2013-03-11 16:17:08 +08:00
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/* Branch trace support for GDB, the GNU debugger.
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2017-01-01 14:50:51 +08:00
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Copyright (C) 2013-2017 Free Software Foundation, Inc.
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2013-03-11 16:17:08 +08:00
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Contributed by Intel Corp. <markus.t.metzger@intel.com>
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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2014-07-25 19:18:00 +08:00
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#include "defs.h"
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2013-03-11 16:17:08 +08:00
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#include "btrace.h"
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#include "gdbthread.h"
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#include "inferior.h"
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#include "target.h"
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#include "record.h"
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#include "symtab.h"
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#include "disasm.h"
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#include "source.h"
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#include "filenames.h"
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2013-03-11 16:28:58 +08:00
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#include "xml-support.h"
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2013-09-10 18:27:14 +08:00
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#include "regcache.h"
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btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
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#include "rsp-low.h"
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btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
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#include "gdbcmd.h"
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#include "cli/cli-utils.h"
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btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
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#include <inttypes.h>
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btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
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#include <ctype.h>
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gdb: Use std::min and std::max throughout
Otherwise including <string> or some other C++ header is broken.
E.g.:
In file included from /opt/gcc/include/c++/7.0.0/bits/char_traits.h:39:0,
from /opt/gcc/include/c++/7.0.0/string:40,
from /home/pedro/gdb/mygit/cxx-convertion/src/gdb/infrun.c:68:
/opt/gcc/include/c++/7.0.0/bits/stl_algobase.h:243:56: error: macro "min" passed 3 arguments, but takes just 2
min(const _Tp& __a, const _Tp& __b, _Compare __comp)
^
/opt/gcc/include/c++/7.0.0/bits/stl_algobase.h:265:56: error: macro "max" passed 3 arguments, but takes just 2
max(const _Tp& __a, const _Tp& __b, _Compare __comp)
^
In file included from .../src/gdb/infrun.c:21:0:
To the best of my grepping abilities, I believe I adjusted all min/max
calls.
gdb/ChangeLog:
2016-09-16 Pedro Alves <palves@redhat.com>
* defs.h (min, max): Delete.
* aarch64-tdep.c: Include <algorithm> and use std::min and
std::max throughout.
* aarch64-tdep.c: Likewise.
* alpha-tdep.c: Likewise.
* amd64-tdep.c: Likewise.
* amd64-windows-tdep.c: Likewise.
* arm-tdep.c: Likewise.
* avr-tdep.c: Likewise.
* breakpoint.c: Likewise.
* btrace.c: Likewise.
* ctf.c: Likewise.
* disasm.c: Likewise.
* doublest.c: Likewise.
* dwarf2loc.c: Likewise.
* dwarf2read.c: Likewise.
* environ.c: Likewise.
* exec.c: Likewise.
* f-exp.y: Likewise.
* findcmd.c: Likewise.
* ft32-tdep.c: Likewise.
* gcore.c: Likewise.
* hppa-tdep.c: Likewise.
* i386-darwin-tdep.c: Likewise.
* i386-tdep.c: Likewise.
* linux-thread-db.c: Likewise.
* lm32-tdep.c: Likewise.
* m32r-tdep.c: Likewise.
* m88k-tdep.c: Likewise.
* memrange.c: Likewise.
* minidebug.c: Likewise.
* mips-tdep.c: Likewise.
* moxie-tdep.c: Likewise.
* nds32-tdep.c: Likewise.
* nios2-tdep.c: Likewise.
* nto-procfs.c: Likewise.
* parse.c: Likewise.
* ppc-sysv-tdep.c: Likewise.
* probe.c: Likewise.
* record-btrace.c: Likewise.
* remote.c: Likewise.
* rs6000-tdep.c: Likewise.
* rx-tdep.c: Likewise.
* s390-linux-nat.c: Likewise.
* s390-linux-tdep.c: Likewise.
* ser-tcp.c: Likewise.
* sh-tdep.c: Likewise.
* sh64-tdep.c: Likewise.
* source.c: Likewise.
* sparc-tdep.c: Likewise.
* symfile.c: Likewise.
* target-memory.c: Likewise.
* target.c: Likewise.
* tic6x-tdep.c: Likewise.
* tilegx-tdep.c: Likewise.
* tracefile-tfile.c: Likewise.
* tracepoint.c: Likewise.
* valprint.c: Likewise.
* value.c: Likewise.
* xtensa-tdep.c: Likewise.
* cli/cli-cmds.c: Likewise.
* compile/compile-object-load.c: Likewise.
2016-09-17 02:55:17 +08:00
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#include <algorithm>
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btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
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/* Command lists for btrace maintenance commands. */
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static struct cmd_list_element *maint_btrace_cmdlist;
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static struct cmd_list_element *maint_btrace_set_cmdlist;
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static struct cmd_list_element *maint_btrace_show_cmdlist;
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static struct cmd_list_element *maint_btrace_pt_set_cmdlist;
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static struct cmd_list_element *maint_btrace_pt_show_cmdlist;
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/* Control whether to skip PAD packets when computing the packet history. */
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static int maint_btrace_pt_skip_pad = 1;
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btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
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static void btrace_add_pc (struct thread_info *tp);
|
2013-03-11 16:17:08 +08:00
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/* Print a record debug message. Use do ... while (0) to avoid ambiguities
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|
when used in if statements. */
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#define DEBUG(msg, args...) \
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do \
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{ \
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if (record_debug != 0) \
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fprintf_unfiltered (gdb_stdlog, \
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"[btrace] " msg "\n", ##args); \
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} \
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while (0)
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#define DEBUG_FTRACE(msg, args...) DEBUG ("[ftrace] " msg, ##args)
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/* Return the function name of a recorded function segment for printing.
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This function never returns NULL. */
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static const char *
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
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ftrace_print_function_name (const struct btrace_function *bfun)
|
2013-03-11 16:17:08 +08:00
|
|
|
{
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|
struct minimal_symbol *msym;
|
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|
struct symbol *sym;
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|
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msym = bfun->msym;
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|
sym = bfun->sym;
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|
if (sym != NULL)
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return SYMBOL_PRINT_NAME (sym);
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if (msym != NULL)
|
change minsym representation
In a later patch we're going to change the minimal symbol address
calculation to apply section offsets at the point of use. To make it
simpler to catch potential problem spots, this patch changes the
representation of minimal symbols and introduces new
minimal-symbol-specific variants of the various accessors. This is
necessary because it would be excessively ambitious to try to convert
all the symbol types at once.
The core of this change is just renaming a field in minimal_symbol;
the rest is just a fairly mechanical rewording.
2014-02-26 Tom Tromey <tromey@redhat.com>
* symtab.h (struct minimal_symbol) <mginfo>: Rename from ginfo.
(MSYMBOL_VALUE, MSYMBOL_VALUE_ADDRESS, MSYMBOL_VALUE_BYTES)
(MSYMBOL_BLOCK_VALUE, MSYMBOL_VALUE_CHAIN, MSYMBOL_LANGUAGE)
(MSYMBOL_SECTION, MSYMBOL_OBJ_SECTION, MSYMBOL_NATURAL_NAME)
(MSYMBOL_LINKAGE_NAME, MSYMBOL_PRINT_NAME, MSYMBOL_DEMANGLED_NAME)
(MSYMBOL_SET_LANGUAGE, MSYMBOL_SEARCH_NAME)
(MSYMBOL_MATCHES_SEARCH_NAME, MSYMBOL_SET_NAMES): New macros.
* ada-lang.c (ada_main_name): Update.
(ada_lookup_simple_minsym): Update.
(ada_make_symbol_completion_list): Update.
(ada_add_standard_exceptions): Update.
* ada-tasks.c (read_atcb, ada_tasks_inferior_data_sniffer): Update.
* aix-thread.c (pdc_symbol_addrs, pd_enable): Update.
* amd64-windows-tdep.c (amd64_skip_main_prologue): Update.
* arm-tdep.c (skip_prologue_function): Update.
(arm_skip_stack_protector, arm_skip_stub): Update.
* arm-wince-tdep.c (arm_pe_skip_trampoline_code): Update.
(arm_wince_skip_main_prologue): Update.
* auxv.c (ld_so_xfer_auxv): Update.
* avr-tdep.c (avr_scan_prologue): Update.
* ax-gdb.c (gen_var_ref): Update.
* block.c (call_site_for_pc): Update.
* blockframe.c (get_pc_function_start): Update.
(find_pc_partial_function_gnu_ifunc): Update.
* breakpoint.c (create_overlay_event_breakpoint): Update.
(create_longjmp_master_breakpoint): Update.
(create_std_terminate_master_breakpoint): Update.
(create_exception_master_breakpoint): Update.
(resolve_sal_pc): Update.
* bsd-uthread.c (bsd_uthread_lookup_address): Update.
* btrace.c (ftrace_print_function_name, ftrace_function_switched):
Update.
* c-valprint.c (c_val_print): Update.
* coff-pe-read.c (add_pe_forwarded_sym): Update.
* coffread.c (coff_symfile_read): Update.
* common/agent.c (agent_look_up_symbols): Update.
* dbxread.c (find_stab_function_addr): Update.
(end_psymtab): Update.
* dwarf2loc.c (call_site_to_target_addr): Update.
(func_verify_no_selftailcall): Update.
(tailcall_dump): Update.
(call_site_find_chain_1): Update.
(dwarf_expr_reg_to_entry_parameter): Update.
* elfread.c (elf_gnu_ifunc_record_cache): Update.
(elf_gnu_ifunc_resolve_by_got): Update.
* f-valprint.c (info_common_command): Update.
* findvar.c (read_var_value): Update.
* frame.c (get_prev_frame_1): Update.
(inside_main_func): Update.
* frv-tdep.c (frv_skip_main_prologue): Update.
(frv_frame_this_id): Update.
* glibc-tdep.c (glibc_skip_solib_resolver): Update.
* gnu-v2-abi.c (gnuv2_value_rtti_type): Update.
* gnu-v3-abi.c (gnuv3_rtti_type): Update.
(gnuv3_skip_trampoline): Update.
* hppa-hpux-tdep.c (hppa32_hpux_in_solib_call_trampoline): Update.
(hppa64_hpux_in_solib_call_trampoline): Update.
(hppa_hpux_skip_trampoline_code): Update.
(hppa64_hpux_search_dummy_call_sequence): Update.
(hppa_hpux_find_import_stub_for_addr): Update.
(hppa_hpux_find_dummy_bpaddr): Update.
* hppa-tdep.c (hppa_symbol_address)
(hppa_lookup_stub_minimal_symbol): Update.
* i386-tdep.c (i386_skip_main_prologue): Update.
(i386_pe_skip_trampoline_code): Update.
* ia64-tdep.c (ia64_convert_from_func_ptr_addr): Update.
* infcall.c (get_function_name): Update.
* infcmd.c (until_next_command): Update.
* jit.c (jit_breakpoint_re_set_internal): Update.
(jit_inferior_init): Update.
* linespec.c (minsym_found): Update.
(add_minsym): Update.
* linux-fork.c (info_checkpoints_command): Update.
* linux-nat.c (get_signo): Update.
* linux-thread-db.c (inferior_has_bug): Update.
* m32c-tdep.c (m32c_return_value): Update.
(m32c_m16c_address_to_pointer): Update.
(m32c_m16c_pointer_to_address): Update.
* m32r-tdep.c (m32r_frame_this_id): Update.
* m68hc11-tdep.c (m68hc11_get_register_info): Update.
* machoread.c (macho_resolve_oso_sym_with_minsym): Update.
* maint.c (maintenance_translate_address): Update.
* minsyms.c (add_minsym_to_hash_table): Update.
(add_minsym_to_demangled_hash_table): Update.
(msymbol_objfile): Update.
(lookup_minimal_symbol): Update.
(iterate_over_minimal_symbols): Update.
(lookup_minimal_symbol_text): Update.
(lookup_minimal_symbol_by_pc_name): Update.
(lookup_minimal_symbol_solib_trampoline): Update.
(lookup_minimal_symbol_by_pc_section_1): Update.
(lookup_minimal_symbol_and_objfile): Update.
(prim_record_minimal_symbol_full): Update.
(compare_minimal_symbols): Update.
(compact_minimal_symbols): Update.
(build_minimal_symbol_hash_tables): Update.
(install_minimal_symbols): Update.
(terminate_minimal_symbol_table): Update.
(find_solib_trampoline_target): Update.
(minimal_symbol_upper_bound): Update.
* mips-linux-tdep.c (mips_linux_skip_resolver): Update.
* mips-tdep.c (mips_stub_frame_sniffer): Update.
(mips_skip_pic_trampoline_code): Update.
* msp430-tdep.c (msp430_skip_trampoline_code): Update.
* objc-lang.c (selectors_info): Update.
(classes_info): Update.
(find_methods): Update.
(find_imps): Update.
(find_objc_msgsend): Update.
* objfiles.c (objfile_relocate1): Update.
* objfiles.h (ALL_OBJFILE_MSYMBOLS): Update.
* obsd-tdep.c (obsd_skip_solib_resolver): Update.
* p-valprint.c (pascal_val_print): Update.
* parse.c (write_exp_msymbol): Update.
* ppc-linux-tdep.c (powerpc_linux_in_dynsym_resolve_code)
(ppc_linux_spe_context_lookup, ppc_elfv2_skip_entrypoint): Update.
* ppc-sysv-tdep.c (convert_code_addr_to_desc_addr): Update.
* printcmd.c (build_address_symbolic): Update.
(sym_info): Update.
(address_info): Update.
* proc-service.c (ps_pglobal_lookup): Update.
* psymtab.c (find_pc_sect_psymtab_closer): Update.
(find_pc_sect_psymtab): Update.
* python/py-framefilter.c (py_print_frame): Update.
* ravenscar-thread.c (get_running_thread_id): Update.
* record-btrace.c (btrace_call_history, btrace_get_bfun_name):
Update.
* remote.c (remote_check_symbols): Update.
* rs6000-tdep.c (rs6000_skip_main_prologue): Update.
(rs6000_skip_trampoline_code): Update.
* sh64-tdep.c (sh64_elf_make_msymbol_special): Update.
* sol2-tdep.c (sol2_skip_solib_resolver): Update.
* solib-dsbt.c (lm_base): Update.
* solib-frv.c (lm_base): Update.
(main_got): Update.
* solib-irix.c (locate_base): Update.
* solib-som.c (som_solib_create_inferior_hook): Update.
(som_solib_desire_dynamic_linker_symbols): Update.
(link_map_start): Update.
* solib-spu.c (spu_enable_break): Update.
(ocl_enable_break): Update.
* solib-svr4.c (elf_locate_base): Update.
(enable_break): Update.
* spu-tdep.c (spu_get_overlay_table): Update.
(spu_catch_start): Update.
(flush_ea_cache): Update.
* stabsread.c (define_symbol): Update.
(scan_file_globals): Update.
* stack.c (find_frame_funname): Update.
(frame_info): Update.
* symfile.c (simple_read_overlay_table): Update.
(simple_overlay_update): Update.
* symmisc.c (dump_msymbols): Update.
* symtab.c (fixup_section): Update.
(find_pc_sect_line): Update.
(skip_prologue_sal): Update.
(search_symbols): Update.
(print_msymbol_info): Update.
(rbreak_command): Update.
(MCOMPLETION_LIST_ADD_SYMBOL): New macro.
(completion_list_objc_symbol): Update.
(default_make_symbol_completion_list_break_on): Update.
* tracepoint.c (scope_info): Update.
* tui/tui-disasm.c (tui_find_disassembly_address): Update.
(tui_get_begin_asm_address): Update.
* valops.c (find_function_in_inferior): Update.
* value.c (value_static_field): Update.
(value_fn_field): Update.
2013-08-15 22:43:43 +08:00
|
|
|
return MSYMBOL_PRINT_NAME (msym);
|
2013-03-11 16:17:08 +08:00
|
|
|
|
|
|
|
return "<unknown>";
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Return the file name of a recorded function segment for printing.
|
|
|
|
This function never returns NULL. */
|
|
|
|
|
|
|
|
static const char *
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
ftrace_print_filename (const struct btrace_function *bfun)
|
2013-03-11 16:17:08 +08:00
|
|
|
{
|
|
|
|
struct symbol *sym;
|
|
|
|
const char *filename;
|
|
|
|
|
|
|
|
sym = bfun->sym;
|
|
|
|
|
|
|
|
if (sym != NULL)
|
2014-12-23 23:21:10 +08:00
|
|
|
filename = symtab_to_filename_for_display (symbol_symtab (sym));
|
2013-03-11 16:17:08 +08:00
|
|
|
else
|
|
|
|
filename = "<unknown>";
|
|
|
|
|
|
|
|
return filename;
|
|
|
|
}
|
|
|
|
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
/* Return a string representation of the address of an instruction.
|
|
|
|
This function never returns NULL. */
|
2013-03-11 16:17:08 +08:00
|
|
|
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
static const char *
|
|
|
|
ftrace_print_insn_addr (const struct btrace_insn *insn)
|
2013-03-11 16:17:08 +08:00
|
|
|
{
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
if (insn == NULL)
|
|
|
|
return "<nil>";
|
|
|
|
|
|
|
|
return core_addr_to_string_nz (insn->pc);
|
2013-03-11 16:17:08 +08:00
|
|
|
}
|
|
|
|
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
/* Print an ftrace debug status message. */
|
2013-03-11 16:17:08 +08:00
|
|
|
|
|
|
|
static void
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
ftrace_debug (const struct btrace_function *bfun, const char *prefix)
|
2013-03-11 16:17:08 +08:00
|
|
|
{
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
const char *fun, *file;
|
|
|
|
unsigned int ibegin, iend;
|
2014-06-24 20:25:50 +08:00
|
|
|
int level;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
|
|
|
fun = ftrace_print_function_name (bfun);
|
|
|
|
file = ftrace_print_filename (bfun);
|
|
|
|
level = bfun->level;
|
|
|
|
|
|
|
|
ibegin = bfun->insn_offset;
|
btrace: Store btrace_insn in an std::vector
Because it contains a non-POD type field (flags), the type btrace_insn
should be new'ed/delete'd. Replace the VEC (btrace_insn_s) in
btrace_function with an std::vector.
gdb/ChangeLog:
* btrace.h (btrace_insn_s, DEF_VEC_O (btrace_insn_s)): Remove.
(btrace_function) <insn>: Change type to use std::vector.
* btrace.c (ftrace_debug, ftrace_call_num_insn,
ftrace_find_call, ftrace_new_gap, ftrace_update_function,
ftrace_update_insns, ftrace_compute_global_level_offset,
btrace_stitch_bts, btrace_clear, btrace_insn_get,
btrace_insn_end, btrace_insn_next, btrace_insn_prev): Adjust to
change to std::vector.
(ftrace_update_insns): Adjust to change to std::vector, change
type of INSN parameter.
(btrace_compute_ftrace_bts): Adjust call to ftrace_update_insns.
* record-btrace.c (btrace_call_history_insn_range,
btrace_compute_src_line_range,
record_btrace_frame_prev_register): Adjust to change to
std::vector.
* python/py-record-btrace.c (recpy_bt_func_instructions): Adjust
to change to std::vector.
2017-09-04 16:46:36 +08:00
|
|
|
iend = ibegin + bfun->insn.size ();
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2014-06-24 20:25:50 +08:00
|
|
|
DEBUG_FTRACE ("%s: fun = %s, file = %s, level = %d, insn = [%u; %u)",
|
|
|
|
prefix, fun, file, level, ibegin, iend);
|
2013-03-11 16:17:08 +08:00
|
|
|
}
|
|
|
|
|
2016-11-21 23:39:57 +08:00
|
|
|
/* Return the number of instructions in a given function call segment. */
|
|
|
|
|
|
|
|
static unsigned int
|
|
|
|
ftrace_call_num_insn (const struct btrace_function* bfun)
|
|
|
|
{
|
|
|
|
if (bfun == NULL)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
/* A gap is always counted as one instruction. */
|
|
|
|
if (bfun->errcode != 0)
|
|
|
|
return 1;
|
|
|
|
|
btrace: Store btrace_insn in an std::vector
Because it contains a non-POD type field (flags), the type btrace_insn
should be new'ed/delete'd. Replace the VEC (btrace_insn_s) in
btrace_function with an std::vector.
gdb/ChangeLog:
* btrace.h (btrace_insn_s, DEF_VEC_O (btrace_insn_s)): Remove.
(btrace_function) <insn>: Change type to use std::vector.
* btrace.c (ftrace_debug, ftrace_call_num_insn,
ftrace_find_call, ftrace_new_gap, ftrace_update_function,
ftrace_update_insns, ftrace_compute_global_level_offset,
btrace_stitch_bts, btrace_clear, btrace_insn_get,
btrace_insn_end, btrace_insn_next, btrace_insn_prev): Adjust to
change to std::vector.
(ftrace_update_insns): Adjust to change to std::vector, change
type of INSN parameter.
(btrace_compute_ftrace_bts): Adjust call to ftrace_update_insns.
* record-btrace.c (btrace_call_history_insn_range,
btrace_compute_src_line_range,
record_btrace_frame_prev_register): Adjust to change to
std::vector.
* python/py-record-btrace.c (recpy_bt_func_instructions): Adjust
to change to std::vector.
2017-09-04 16:46:36 +08:00
|
|
|
return bfun->insn.size ();
|
2016-11-21 23:39:57 +08:00
|
|
|
}
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
/* Return the function segment with the given NUMBER or NULL if no such segment
|
|
|
|
exists. BTINFO is the branch trace information for the current thread. */
|
|
|
|
|
|
|
|
static struct btrace_function *
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_find_call_by_number (struct btrace_thread_info *btinfo,
|
|
|
|
unsigned int number)
|
|
|
|
{
|
|
|
|
if (number == 0 || number > btinfo->functions.size ())
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
return &btinfo->functions[number - 1];
|
|
|
|
}
|
|
|
|
|
|
|
|
/* A const version of the function above. */
|
|
|
|
|
|
|
|
static const struct btrace_function *
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_find_call_by_number (const struct btrace_thread_info *btinfo,
|
|
|
|
unsigned int number)
|
|
|
|
{
|
|
|
|
if (number == 0 || number > btinfo->functions.size ())
|
|
|
|
return NULL;
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
return &btinfo->functions[number - 1];
|
2017-05-30 18:47:37 +08:00
|
|
|
}
|
|
|
|
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
/* Return non-zero if BFUN does not match MFUN and FUN,
|
|
|
|
return zero otherwise. */
|
2013-03-11 16:17:08 +08:00
|
|
|
|
|
|
|
static int
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
ftrace_function_switched (const struct btrace_function *bfun,
|
|
|
|
const struct minimal_symbol *mfun,
|
|
|
|
const struct symbol *fun)
|
2013-03-11 16:17:08 +08:00
|
|
|
{
|
|
|
|
struct minimal_symbol *msym;
|
|
|
|
struct symbol *sym;
|
|
|
|
|
|
|
|
msym = bfun->msym;
|
|
|
|
sym = bfun->sym;
|
|
|
|
|
|
|
|
/* If the minimal symbol changed, we certainly switched functions. */
|
|
|
|
if (mfun != NULL && msym != NULL
|
change minsym representation
In a later patch we're going to change the minimal symbol address
calculation to apply section offsets at the point of use. To make it
simpler to catch potential problem spots, this patch changes the
representation of minimal symbols and introduces new
minimal-symbol-specific variants of the various accessors. This is
necessary because it would be excessively ambitious to try to convert
all the symbol types at once.
The core of this change is just renaming a field in minimal_symbol;
the rest is just a fairly mechanical rewording.
2014-02-26 Tom Tromey <tromey@redhat.com>
* symtab.h (struct minimal_symbol) <mginfo>: Rename from ginfo.
(MSYMBOL_VALUE, MSYMBOL_VALUE_ADDRESS, MSYMBOL_VALUE_BYTES)
(MSYMBOL_BLOCK_VALUE, MSYMBOL_VALUE_CHAIN, MSYMBOL_LANGUAGE)
(MSYMBOL_SECTION, MSYMBOL_OBJ_SECTION, MSYMBOL_NATURAL_NAME)
(MSYMBOL_LINKAGE_NAME, MSYMBOL_PRINT_NAME, MSYMBOL_DEMANGLED_NAME)
(MSYMBOL_SET_LANGUAGE, MSYMBOL_SEARCH_NAME)
(MSYMBOL_MATCHES_SEARCH_NAME, MSYMBOL_SET_NAMES): New macros.
* ada-lang.c (ada_main_name): Update.
(ada_lookup_simple_minsym): Update.
(ada_make_symbol_completion_list): Update.
(ada_add_standard_exceptions): Update.
* ada-tasks.c (read_atcb, ada_tasks_inferior_data_sniffer): Update.
* aix-thread.c (pdc_symbol_addrs, pd_enable): Update.
* amd64-windows-tdep.c (amd64_skip_main_prologue): Update.
* arm-tdep.c (skip_prologue_function): Update.
(arm_skip_stack_protector, arm_skip_stub): Update.
* arm-wince-tdep.c (arm_pe_skip_trampoline_code): Update.
(arm_wince_skip_main_prologue): Update.
* auxv.c (ld_so_xfer_auxv): Update.
* avr-tdep.c (avr_scan_prologue): Update.
* ax-gdb.c (gen_var_ref): Update.
* block.c (call_site_for_pc): Update.
* blockframe.c (get_pc_function_start): Update.
(find_pc_partial_function_gnu_ifunc): Update.
* breakpoint.c (create_overlay_event_breakpoint): Update.
(create_longjmp_master_breakpoint): Update.
(create_std_terminate_master_breakpoint): Update.
(create_exception_master_breakpoint): Update.
(resolve_sal_pc): Update.
* bsd-uthread.c (bsd_uthread_lookup_address): Update.
* btrace.c (ftrace_print_function_name, ftrace_function_switched):
Update.
* c-valprint.c (c_val_print): Update.
* coff-pe-read.c (add_pe_forwarded_sym): Update.
* coffread.c (coff_symfile_read): Update.
* common/agent.c (agent_look_up_symbols): Update.
* dbxread.c (find_stab_function_addr): Update.
(end_psymtab): Update.
* dwarf2loc.c (call_site_to_target_addr): Update.
(func_verify_no_selftailcall): Update.
(tailcall_dump): Update.
(call_site_find_chain_1): Update.
(dwarf_expr_reg_to_entry_parameter): Update.
* elfread.c (elf_gnu_ifunc_record_cache): Update.
(elf_gnu_ifunc_resolve_by_got): Update.
* f-valprint.c (info_common_command): Update.
* findvar.c (read_var_value): Update.
* frame.c (get_prev_frame_1): Update.
(inside_main_func): Update.
* frv-tdep.c (frv_skip_main_prologue): Update.
(frv_frame_this_id): Update.
* glibc-tdep.c (glibc_skip_solib_resolver): Update.
* gnu-v2-abi.c (gnuv2_value_rtti_type): Update.
* gnu-v3-abi.c (gnuv3_rtti_type): Update.
(gnuv3_skip_trampoline): Update.
* hppa-hpux-tdep.c (hppa32_hpux_in_solib_call_trampoline): Update.
(hppa64_hpux_in_solib_call_trampoline): Update.
(hppa_hpux_skip_trampoline_code): Update.
(hppa64_hpux_search_dummy_call_sequence): Update.
(hppa_hpux_find_import_stub_for_addr): Update.
(hppa_hpux_find_dummy_bpaddr): Update.
* hppa-tdep.c (hppa_symbol_address)
(hppa_lookup_stub_minimal_symbol): Update.
* i386-tdep.c (i386_skip_main_prologue): Update.
(i386_pe_skip_trampoline_code): Update.
* ia64-tdep.c (ia64_convert_from_func_ptr_addr): Update.
* infcall.c (get_function_name): Update.
* infcmd.c (until_next_command): Update.
* jit.c (jit_breakpoint_re_set_internal): Update.
(jit_inferior_init): Update.
* linespec.c (minsym_found): Update.
(add_minsym): Update.
* linux-fork.c (info_checkpoints_command): Update.
* linux-nat.c (get_signo): Update.
* linux-thread-db.c (inferior_has_bug): Update.
* m32c-tdep.c (m32c_return_value): Update.
(m32c_m16c_address_to_pointer): Update.
(m32c_m16c_pointer_to_address): Update.
* m32r-tdep.c (m32r_frame_this_id): Update.
* m68hc11-tdep.c (m68hc11_get_register_info): Update.
* machoread.c (macho_resolve_oso_sym_with_minsym): Update.
* maint.c (maintenance_translate_address): Update.
* minsyms.c (add_minsym_to_hash_table): Update.
(add_minsym_to_demangled_hash_table): Update.
(msymbol_objfile): Update.
(lookup_minimal_symbol): Update.
(iterate_over_minimal_symbols): Update.
(lookup_minimal_symbol_text): Update.
(lookup_minimal_symbol_by_pc_name): Update.
(lookup_minimal_symbol_solib_trampoline): Update.
(lookup_minimal_symbol_by_pc_section_1): Update.
(lookup_minimal_symbol_and_objfile): Update.
(prim_record_minimal_symbol_full): Update.
(compare_minimal_symbols): Update.
(compact_minimal_symbols): Update.
(build_minimal_symbol_hash_tables): Update.
(install_minimal_symbols): Update.
(terminate_minimal_symbol_table): Update.
(find_solib_trampoline_target): Update.
(minimal_symbol_upper_bound): Update.
* mips-linux-tdep.c (mips_linux_skip_resolver): Update.
* mips-tdep.c (mips_stub_frame_sniffer): Update.
(mips_skip_pic_trampoline_code): Update.
* msp430-tdep.c (msp430_skip_trampoline_code): Update.
* objc-lang.c (selectors_info): Update.
(classes_info): Update.
(find_methods): Update.
(find_imps): Update.
(find_objc_msgsend): Update.
* objfiles.c (objfile_relocate1): Update.
* objfiles.h (ALL_OBJFILE_MSYMBOLS): Update.
* obsd-tdep.c (obsd_skip_solib_resolver): Update.
* p-valprint.c (pascal_val_print): Update.
* parse.c (write_exp_msymbol): Update.
* ppc-linux-tdep.c (powerpc_linux_in_dynsym_resolve_code)
(ppc_linux_spe_context_lookup, ppc_elfv2_skip_entrypoint): Update.
* ppc-sysv-tdep.c (convert_code_addr_to_desc_addr): Update.
* printcmd.c (build_address_symbolic): Update.
(sym_info): Update.
(address_info): Update.
* proc-service.c (ps_pglobal_lookup): Update.
* psymtab.c (find_pc_sect_psymtab_closer): Update.
(find_pc_sect_psymtab): Update.
* python/py-framefilter.c (py_print_frame): Update.
* ravenscar-thread.c (get_running_thread_id): Update.
* record-btrace.c (btrace_call_history, btrace_get_bfun_name):
Update.
* remote.c (remote_check_symbols): Update.
* rs6000-tdep.c (rs6000_skip_main_prologue): Update.
(rs6000_skip_trampoline_code): Update.
* sh64-tdep.c (sh64_elf_make_msymbol_special): Update.
* sol2-tdep.c (sol2_skip_solib_resolver): Update.
* solib-dsbt.c (lm_base): Update.
* solib-frv.c (lm_base): Update.
(main_got): Update.
* solib-irix.c (locate_base): Update.
* solib-som.c (som_solib_create_inferior_hook): Update.
(som_solib_desire_dynamic_linker_symbols): Update.
(link_map_start): Update.
* solib-spu.c (spu_enable_break): Update.
(ocl_enable_break): Update.
* solib-svr4.c (elf_locate_base): Update.
(enable_break): Update.
* spu-tdep.c (spu_get_overlay_table): Update.
(spu_catch_start): Update.
(flush_ea_cache): Update.
* stabsread.c (define_symbol): Update.
(scan_file_globals): Update.
* stack.c (find_frame_funname): Update.
(frame_info): Update.
* symfile.c (simple_read_overlay_table): Update.
(simple_overlay_update): Update.
* symmisc.c (dump_msymbols): Update.
* symtab.c (fixup_section): Update.
(find_pc_sect_line): Update.
(skip_prologue_sal): Update.
(search_symbols): Update.
(print_msymbol_info): Update.
(rbreak_command): Update.
(MCOMPLETION_LIST_ADD_SYMBOL): New macro.
(completion_list_objc_symbol): Update.
(default_make_symbol_completion_list_break_on): Update.
* tracepoint.c (scope_info): Update.
* tui/tui-disasm.c (tui_find_disassembly_address): Update.
(tui_get_begin_asm_address): Update.
* valops.c (find_function_in_inferior): Update.
* value.c (value_static_field): Update.
(value_fn_field): Update.
2013-08-15 22:43:43 +08:00
|
|
|
&& strcmp (MSYMBOL_LINKAGE_NAME (mfun), MSYMBOL_LINKAGE_NAME (msym)) != 0)
|
2013-03-11 16:17:08 +08:00
|
|
|
return 1;
|
|
|
|
|
|
|
|
/* If the symbol changed, we certainly switched functions. */
|
|
|
|
if (fun != NULL && sym != NULL)
|
|
|
|
{
|
|
|
|
const char *bfname, *fname;
|
|
|
|
|
|
|
|
/* Check the function name. */
|
|
|
|
if (strcmp (SYMBOL_LINKAGE_NAME (fun), SYMBOL_LINKAGE_NAME (sym)) != 0)
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
/* Check the location of those functions, as well. */
|
2014-12-23 23:21:10 +08:00
|
|
|
bfname = symtab_to_fullname (symbol_symtab (sym));
|
|
|
|
fname = symtab_to_fullname (symbol_symtab (fun));
|
2013-03-11 16:17:08 +08:00
|
|
|
if (filename_cmp (fname, bfname) != 0)
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
/* If we lost symbol information, we switched functions. */
|
|
|
|
if (!(msym == NULL && sym == NULL) && mfun == NULL && fun == NULL)
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
/* If we gained symbol information, we switched functions. */
|
|
|
|
if (msym == NULL && sym == NULL && !(mfun == NULL && fun == NULL))
|
|
|
|
return 1;
|
|
|
|
|
2013-03-11 16:17:08 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
/* Allocate and initialize a new branch trace function segment at the end of
|
|
|
|
the trace.
|
2017-05-30 18:47:37 +08:00
|
|
|
BTINFO is the branch trace information for the current thread.
|
2017-05-30 18:47:37 +08:00
|
|
|
MFUN and FUN are the symbol information we have for this function.
|
|
|
|
This invalidates all struct btrace_function pointer currently held. */
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
|
|
|
static struct btrace_function *
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_new_function (struct btrace_thread_info *btinfo,
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
struct minimal_symbol *mfun,
|
|
|
|
struct symbol *fun)
|
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
int level;
|
|
|
|
unsigned int number, insn_offset;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
if (btinfo->functions.empty ())
|
2013-05-13 20:57:42 +08:00
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
/* Start counting NUMBER and INSN_OFFSET at one. */
|
|
|
|
level = 0;
|
|
|
|
number = 1;
|
|
|
|
insn_offset = 1;
|
2013-05-13 20:57:42 +08:00
|
|
|
}
|
|
|
|
else
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
const struct btrace_function *prev = &btinfo->functions.back ();
|
|
|
|
level = prev->level;
|
|
|
|
number = prev->number + 1;
|
|
|
|
insn_offset = prev->insn_offset + ftrace_call_num_insn (prev);
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
}
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
btinfo->functions.emplace_back (mfun, fun, number, insn_offset, level);
|
|
|
|
return &btinfo->functions.back ();
|
2013-03-11 16:17:08 +08:00
|
|
|
}
|
|
|
|
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
/* Update the UP field of a function segment. */
|
2013-03-11 16:17:08 +08:00
|
|
|
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
static void
|
|
|
|
ftrace_update_caller (struct btrace_function *bfun,
|
|
|
|
struct btrace_function *caller,
|
|
|
|
enum btrace_function_flag flags)
|
2013-03-11 16:17:08 +08:00
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
if (bfun->up != 0)
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
ftrace_debug (bfun, "updating caller");
|
2013-03-11 16:17:08 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
bfun->up = caller->number;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
bfun->flags = flags;
|
|
|
|
|
|
|
|
ftrace_debug (bfun, "set caller");
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
ftrace_debug (caller, "..to");
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Fix up the caller for all segments of a function. */
|
|
|
|
|
|
|
|
static void
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_fixup_caller (struct btrace_thread_info *btinfo,
|
|
|
|
struct btrace_function *bfun,
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
struct btrace_function *caller,
|
|
|
|
enum btrace_function_flag flags)
|
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
unsigned int prev, next;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
prev = bfun->prev;
|
|
|
|
next = bfun->next;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
ftrace_update_caller (bfun, caller, flags);
|
|
|
|
|
|
|
|
/* Update all function segments belonging to the same function. */
|
2017-05-30 18:47:37 +08:00
|
|
|
for (; prev != 0; prev = bfun->prev)
|
|
|
|
{
|
|
|
|
bfun = ftrace_find_call_by_number (btinfo, prev);
|
|
|
|
ftrace_update_caller (bfun, caller, flags);
|
|
|
|
}
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
for (; next != 0; next = bfun->next)
|
|
|
|
{
|
|
|
|
bfun = ftrace_find_call_by_number (btinfo, next);
|
|
|
|
ftrace_update_caller (bfun, caller, flags);
|
|
|
|
}
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
}
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
/* Add a new function segment for a call at the end of the trace.
|
2017-05-30 18:47:37 +08:00
|
|
|
BTINFO is the branch trace information for the current thread.
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
MFUN and FUN are the symbol information we have for this function. */
|
|
|
|
|
|
|
|
static struct btrace_function *
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_new_call (struct btrace_thread_info *btinfo,
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
struct minimal_symbol *mfun,
|
|
|
|
struct symbol *fun)
|
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
const unsigned int length = btinfo->functions.size ();
|
2017-05-30 18:47:37 +08:00
|
|
|
struct btrace_function *bfun = ftrace_new_function (btinfo, mfun, fun);
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
bfun->up = length;
|
record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
|
|
|
bfun->level += 1;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
|
|
|
ftrace_debug (bfun, "new call");
|
|
|
|
|
|
|
|
return bfun;
|
|
|
|
}
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
/* Add a new function segment for a tail call at the end of the trace.
|
2017-05-30 18:47:37 +08:00
|
|
|
BTINFO is the branch trace information for the current thread.
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
MFUN and FUN are the symbol information we have for this function. */
|
|
|
|
|
|
|
|
static struct btrace_function *
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_new_tailcall (struct btrace_thread_info *btinfo,
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
struct minimal_symbol *mfun,
|
|
|
|
struct symbol *fun)
|
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
const unsigned int length = btinfo->functions.size ();
|
2017-05-30 18:47:37 +08:00
|
|
|
struct btrace_function *bfun = ftrace_new_function (btinfo, mfun, fun);
|
2013-03-11 16:17:08 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
bfun->up = length;
|
record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
|
|
|
bfun->level += 1;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
bfun->flags |= BFUN_UP_LINKS_TO_TAILCALL;
|
2013-03-11 16:17:08 +08:00
|
|
|
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
ftrace_debug (bfun, "new tail call");
|
|
|
|
|
|
|
|
return bfun;
|
|
|
|
}
|
|
|
|
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
/* Return the caller of BFUN or NULL if there is none. This function skips
|
2017-05-30 18:47:37 +08:00
|
|
|
tail calls in the call chain. BTINFO is the branch trace information for
|
|
|
|
the current thread. */
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
static struct btrace_function *
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_get_caller (struct btrace_thread_info *btinfo,
|
|
|
|
struct btrace_function *bfun)
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
for (; bfun != NULL; bfun = ftrace_find_call_by_number (btinfo, bfun->up))
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
if ((bfun->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0)
|
2017-05-30 18:47:37 +08:00
|
|
|
return ftrace_find_call_by_number (btinfo, bfun->up);
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
/* Find the innermost caller in the back trace of BFUN with MFUN/FUN
|
2017-05-30 18:47:37 +08:00
|
|
|
symbol information. BTINFO is the branch trace information for the current
|
|
|
|
thread. */
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
|
|
|
static struct btrace_function *
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_find_caller (struct btrace_thread_info *btinfo,
|
|
|
|
struct btrace_function *bfun,
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
struct minimal_symbol *mfun,
|
|
|
|
struct symbol *fun)
|
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
for (; bfun != NULL; bfun = ftrace_find_call_by_number (btinfo, bfun->up))
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
{
|
|
|
|
/* Skip functions with incompatible symbol information. */
|
|
|
|
if (ftrace_function_switched (bfun, mfun, fun))
|
|
|
|
continue;
|
|
|
|
|
|
|
|
/* This is the function segment we're looking for. */
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
return bfun;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Find the innermost caller in the back trace of BFUN, skipping all
|
|
|
|
function segments that do not end with a call instruction (e.g.
|
2017-05-30 18:47:37 +08:00
|
|
|
tail calls ending with a jump). BTINFO is the branch trace information for
|
|
|
|
the current thread. */
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
|
|
|
static struct btrace_function *
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_find_call (struct btrace_thread_info *btinfo,
|
|
|
|
struct btrace_function *bfun)
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
for (; bfun != NULL; bfun = ftrace_find_call_by_number (btinfo, bfun->up))
|
2013-03-11 16:17:08 +08:00
|
|
|
{
|
record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
|
|
|
/* Skip gaps. */
|
|
|
|
if (bfun->errcode != 0)
|
|
|
|
continue;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
btrace: Store btrace_insn in an std::vector
Because it contains a non-POD type field (flags), the type btrace_insn
should be new'ed/delete'd. Replace the VEC (btrace_insn_s) in
btrace_function with an std::vector.
gdb/ChangeLog:
* btrace.h (btrace_insn_s, DEF_VEC_O (btrace_insn_s)): Remove.
(btrace_function) <insn>: Change type to use std::vector.
* btrace.c (ftrace_debug, ftrace_call_num_insn,
ftrace_find_call, ftrace_new_gap, ftrace_update_function,
ftrace_update_insns, ftrace_compute_global_level_offset,
btrace_stitch_bts, btrace_clear, btrace_insn_get,
btrace_insn_end, btrace_insn_next, btrace_insn_prev): Adjust to
change to std::vector.
(ftrace_update_insns): Adjust to change to std::vector, change
type of INSN parameter.
(btrace_compute_ftrace_bts): Adjust call to ftrace_update_insns.
* record-btrace.c (btrace_call_history_insn_range,
btrace_compute_src_line_range,
record_btrace_frame_prev_register): Adjust to change to
std::vector.
* python/py-record-btrace.c (recpy_bt_func_instructions): Adjust
to change to std::vector.
2017-09-04 16:46:36 +08:00
|
|
|
btrace_insn &last = bfun->insn.back ();
|
2013-03-11 16:17:08 +08:00
|
|
|
|
btrace: Store btrace_insn in an std::vector
Because it contains a non-POD type field (flags), the type btrace_insn
should be new'ed/delete'd. Replace the VEC (btrace_insn_s) in
btrace_function with an std::vector.
gdb/ChangeLog:
* btrace.h (btrace_insn_s, DEF_VEC_O (btrace_insn_s)): Remove.
(btrace_function) <insn>: Change type to use std::vector.
* btrace.c (ftrace_debug, ftrace_call_num_insn,
ftrace_find_call, ftrace_new_gap, ftrace_update_function,
ftrace_update_insns, ftrace_compute_global_level_offset,
btrace_stitch_bts, btrace_clear, btrace_insn_get,
btrace_insn_end, btrace_insn_next, btrace_insn_prev): Adjust to
change to std::vector.
(ftrace_update_insns): Adjust to change to std::vector, change
type of INSN parameter.
(btrace_compute_ftrace_bts): Adjust call to ftrace_update_insns.
* record-btrace.c (btrace_call_history_insn_range,
btrace_compute_src_line_range,
record_btrace_frame_prev_register): Adjust to change to
std::vector.
* python/py-record-btrace.c (recpy_bt_func_instructions): Adjust
to change to std::vector.
2017-09-04 16:46:36 +08:00
|
|
|
if (last.iclass == BTRACE_INSN_CALL)
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
return bfun;
|
|
|
|
}
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
/* Add a continuation segment for a function into which we return at the end of
|
|
|
|
the trace.
|
2017-05-30 18:47:37 +08:00
|
|
|
BTINFO is the branch trace information for the current thread.
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
MFUN and FUN are the symbol information we have for this function. */
|
|
|
|
|
|
|
|
static struct btrace_function *
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_new_return (struct btrace_thread_info *btinfo,
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
struct minimal_symbol *mfun,
|
|
|
|
struct symbol *fun)
|
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
struct btrace_function *prev, *bfun, *caller;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
bfun = ftrace_new_function (btinfo, mfun, fun);
|
2017-05-30 18:47:37 +08:00
|
|
|
prev = ftrace_find_call_by_number (btinfo, bfun->number - 1);
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
|
|
|
/* It is important to start at PREV's caller. Otherwise, we might find
|
|
|
|
PREV itself, if PREV is a recursive function. */
|
2017-05-30 18:47:37 +08:00
|
|
|
caller = ftrace_find_call_by_number (btinfo, prev->up);
|
|
|
|
caller = ftrace_find_caller (btinfo, caller, mfun, fun);
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
if (caller != NULL)
|
|
|
|
{
|
|
|
|
/* The caller of PREV is the preceding btrace function segment in this
|
|
|
|
function instance. */
|
2017-05-30 18:47:37 +08:00
|
|
|
gdb_assert (caller->next == 0);
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
caller->next = bfun->number;
|
|
|
|
bfun->prev = caller->number;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
|
|
|
/* Maintain the function level. */
|
|
|
|
bfun->level = caller->level;
|
|
|
|
|
|
|
|
/* Maintain the call stack. */
|
|
|
|
bfun->up = caller->up;
|
|
|
|
bfun->flags = caller->flags;
|
|
|
|
|
|
|
|
ftrace_debug (bfun, "new return");
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
/* We did not find a caller. This could mean that something went
|
|
|
|
wrong or that the call is simply not included in the trace. */
|
2013-03-11 16:17:08 +08:00
|
|
|
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
/* Let's search for some actual call. */
|
2017-05-30 18:47:37 +08:00
|
|
|
caller = ftrace_find_call_by_number (btinfo, prev->up);
|
|
|
|
caller = ftrace_find_call (btinfo, caller);
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
if (caller == NULL)
|
2013-03-11 16:17:08 +08:00
|
|
|
{
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
/* There is no call in PREV's back trace. We assume that the
|
|
|
|
branch trace did not include it. */
|
|
|
|
|
btrace: preserve function level for unexpected returns
When encountering a return for which we have not seen a corresponding call, GDB
starts a new back trace from level -1, i.e. from the level of the first function
in the trace.
In the presence of trace gaps, this may cause some rather big jump.
(gdb) record function-call-history /c 192, +8
192 sbrk
193 brk
194 __x86.get_pc_thunk.bx
195 brk
196 __kernel_vsyscall
197 [disabled]
198 __kernel_vsyscall
199 brk
200 sbrk
This doesn't help to make things more clear. Let's remain on the same level
instead.
(gdb) record function-call-history /c 192, +8
192 sbrk
193 brk
194 __x86.get_pc_thunk.bx
195 brk
196 __kernel_vsyscall
197 [disabled]
198 __kernel_vsyscall
199 brk
200 sbrk
In this case it will look like we were able to connect the trace parts across
the disabled gap. We were not. More work is required to achieve this.
In the general case, the function-call history for the two trace parts won't
match. They may be off by a few levels or they may be entirely different. All
this patch does is to preserve the indentation level of the record
function-call-history command.
The disabled gap is caused by a sysenter not returning to the next instruction.
(gdb) record function-call-history /i 196, +1
196 __kernel_vsyscall inst 66515,66519
(gdb) record instruction-history 66515
66515 0xb7fdcbf8 <__kernel_vsyscall+0>: push %ecx
66516 0xb7fdcbf9 <__kernel_vsyscall+1>: push %edx
66517 0xb7fdcbfa <__kernel_vsyscall+2>: push %ebp
66518 0xb7fdcbfb <__kernel_vsyscall+3>: mov %esp,%ebp
66519 0xb7fdcbfd <__kernel_vsyscall+5>: sysenter
[disabled]
66520 0xb7fdcc08 <__kernel_vsyscall+16>: pop %ebp
66521 0xb7fdcc09 <__kernel_vsyscall+17>: pop %edx
66522 0xb7fdcc0a <__kernel_vsyscall+18>: pop %ecx
66523 0xb7fdcc0b <__kernel_vsyscall+19>: ret
66524 0xb7e8e09e <brk+30>: xchg %ecx,%ebx
(gdb) disassemble 0xb7fdcbf8, 0xb7fdcc0c
Dump of assembler code from 0xb7fdcbf8 to 0xb7fdcc0c:
0xb7fdcbf8 <__kernel_vsyscall+0>: push %ecx
0xb7fdcbf9 <__kernel_vsyscall+1>: push %edx
0xb7fdcbfa <__kernel_vsyscall+2>: push %ebp
0xb7fdcbfb <__kernel_vsyscall+3>: mov %esp,%ebp
0xb7fdcbfd <__kernel_vsyscall+5>: sysenter
0xb7fdcbff <__kernel_vsyscall+7>: nop
0xb7fdcc00 <__kernel_vsyscall+8>: nop
0xb7fdcc01 <__kernel_vsyscall+9>: nop
0xb7fdcc02 <__kernel_vsyscall+10>: nop
0xb7fdcc03 <__kernel_vsyscall+11>: nop
0xb7fdcc04 <__kernel_vsyscall+12>: nop
0xb7fdcc05 <__kernel_vsyscall+13>: nop
0xb7fdcc06 <__kernel_vsyscall+14>: int $0x80
0xb7fdcc08 <__kernel_vsyscall+16>: pop %ebp
0xb7fdcc09 <__kernel_vsyscall+17>: pop %edx
0xb7fdcc0a <__kernel_vsyscall+18>: pop %ecx
0xb7fdcc0b <__kernel_vsyscall+19>: ret
End of assembler dump.
I've seen this on 32-bit Fedora 23. I have not investigated what causes this
and whether we can avoid the gap in the first place. Let's first try to make
GDB handle such gaps more gracefully.
gdb/
* btrace.c (ftrace_new_return): Start from the previous function's level
if we can't find a matching call for a return.
2016-01-19 21:54:19 +08:00
|
|
|
/* Let's find the topmost function and add a new caller for it.
|
|
|
|
This should handle a series of initial tail calls. */
|
2017-05-30 18:47:37 +08:00
|
|
|
while (prev->up != 0)
|
|
|
|
prev = ftrace_find_call_by_number (btinfo, prev->up);
|
2013-03-11 16:17:08 +08:00
|
|
|
|
btrace: preserve function level for unexpected returns
When encountering a return for which we have not seen a corresponding call, GDB
starts a new back trace from level -1, i.e. from the level of the first function
in the trace.
In the presence of trace gaps, this may cause some rather big jump.
(gdb) record function-call-history /c 192, +8
192 sbrk
193 brk
194 __x86.get_pc_thunk.bx
195 brk
196 __kernel_vsyscall
197 [disabled]
198 __kernel_vsyscall
199 brk
200 sbrk
This doesn't help to make things more clear. Let's remain on the same level
instead.
(gdb) record function-call-history /c 192, +8
192 sbrk
193 brk
194 __x86.get_pc_thunk.bx
195 brk
196 __kernel_vsyscall
197 [disabled]
198 __kernel_vsyscall
199 brk
200 sbrk
In this case it will look like we were able to connect the trace parts across
the disabled gap. We were not. More work is required to achieve this.
In the general case, the function-call history for the two trace parts won't
match. They may be off by a few levels or they may be entirely different. All
this patch does is to preserve the indentation level of the record
function-call-history command.
The disabled gap is caused by a sysenter not returning to the next instruction.
(gdb) record function-call-history /i 196, +1
196 __kernel_vsyscall inst 66515,66519
(gdb) record instruction-history 66515
66515 0xb7fdcbf8 <__kernel_vsyscall+0>: push %ecx
66516 0xb7fdcbf9 <__kernel_vsyscall+1>: push %edx
66517 0xb7fdcbfa <__kernel_vsyscall+2>: push %ebp
66518 0xb7fdcbfb <__kernel_vsyscall+3>: mov %esp,%ebp
66519 0xb7fdcbfd <__kernel_vsyscall+5>: sysenter
[disabled]
66520 0xb7fdcc08 <__kernel_vsyscall+16>: pop %ebp
66521 0xb7fdcc09 <__kernel_vsyscall+17>: pop %edx
66522 0xb7fdcc0a <__kernel_vsyscall+18>: pop %ecx
66523 0xb7fdcc0b <__kernel_vsyscall+19>: ret
66524 0xb7e8e09e <brk+30>: xchg %ecx,%ebx
(gdb) disassemble 0xb7fdcbf8, 0xb7fdcc0c
Dump of assembler code from 0xb7fdcbf8 to 0xb7fdcc0c:
0xb7fdcbf8 <__kernel_vsyscall+0>: push %ecx
0xb7fdcbf9 <__kernel_vsyscall+1>: push %edx
0xb7fdcbfa <__kernel_vsyscall+2>: push %ebp
0xb7fdcbfb <__kernel_vsyscall+3>: mov %esp,%ebp
0xb7fdcbfd <__kernel_vsyscall+5>: sysenter
0xb7fdcbff <__kernel_vsyscall+7>: nop
0xb7fdcc00 <__kernel_vsyscall+8>: nop
0xb7fdcc01 <__kernel_vsyscall+9>: nop
0xb7fdcc02 <__kernel_vsyscall+10>: nop
0xb7fdcc03 <__kernel_vsyscall+11>: nop
0xb7fdcc04 <__kernel_vsyscall+12>: nop
0xb7fdcc05 <__kernel_vsyscall+13>: nop
0xb7fdcc06 <__kernel_vsyscall+14>: int $0x80
0xb7fdcc08 <__kernel_vsyscall+16>: pop %ebp
0xb7fdcc09 <__kernel_vsyscall+17>: pop %edx
0xb7fdcc0a <__kernel_vsyscall+18>: pop %ecx
0xb7fdcc0b <__kernel_vsyscall+19>: ret
End of assembler dump.
I've seen this on 32-bit Fedora 23. I have not investigated what causes this
and whether we can avoid the gap in the first place. Let's first try to make
GDB handle such gaps more gracefully.
gdb/
* btrace.c (ftrace_new_return): Start from the previous function's level
if we can't find a matching call for a return.
2016-01-19 21:54:19 +08:00
|
|
|
bfun->level = prev->level - 1;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
|
|
|
/* Fix up the call stack for PREV. */
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_fixup_caller (btinfo, prev, bfun, BFUN_UP_LINKS_TO_RET);
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
|
|
|
ftrace_debug (bfun, "new return - no caller");
|
|
|
|
}
|
|
|
|
else
|
2013-03-11 16:17:08 +08:00
|
|
|
{
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
/* There is a call in PREV's back trace to which we should have
|
btrace: preserve function level for unexpected returns
When encountering a return for which we have not seen a corresponding call, GDB
starts a new back trace from level -1, i.e. from the level of the first function
in the trace.
In the presence of trace gaps, this may cause some rather big jump.
(gdb) record function-call-history /c 192, +8
192 sbrk
193 brk
194 __x86.get_pc_thunk.bx
195 brk
196 __kernel_vsyscall
197 [disabled]
198 __kernel_vsyscall
199 brk
200 sbrk
This doesn't help to make things more clear. Let's remain on the same level
instead.
(gdb) record function-call-history /c 192, +8
192 sbrk
193 brk
194 __x86.get_pc_thunk.bx
195 brk
196 __kernel_vsyscall
197 [disabled]
198 __kernel_vsyscall
199 brk
200 sbrk
In this case it will look like we were able to connect the trace parts across
the disabled gap. We were not. More work is required to achieve this.
In the general case, the function-call history for the two trace parts won't
match. They may be off by a few levels or they may be entirely different. All
this patch does is to preserve the indentation level of the record
function-call-history command.
The disabled gap is caused by a sysenter not returning to the next instruction.
(gdb) record function-call-history /i 196, +1
196 __kernel_vsyscall inst 66515,66519
(gdb) record instruction-history 66515
66515 0xb7fdcbf8 <__kernel_vsyscall+0>: push %ecx
66516 0xb7fdcbf9 <__kernel_vsyscall+1>: push %edx
66517 0xb7fdcbfa <__kernel_vsyscall+2>: push %ebp
66518 0xb7fdcbfb <__kernel_vsyscall+3>: mov %esp,%ebp
66519 0xb7fdcbfd <__kernel_vsyscall+5>: sysenter
[disabled]
66520 0xb7fdcc08 <__kernel_vsyscall+16>: pop %ebp
66521 0xb7fdcc09 <__kernel_vsyscall+17>: pop %edx
66522 0xb7fdcc0a <__kernel_vsyscall+18>: pop %ecx
66523 0xb7fdcc0b <__kernel_vsyscall+19>: ret
66524 0xb7e8e09e <brk+30>: xchg %ecx,%ebx
(gdb) disassemble 0xb7fdcbf8, 0xb7fdcc0c
Dump of assembler code from 0xb7fdcbf8 to 0xb7fdcc0c:
0xb7fdcbf8 <__kernel_vsyscall+0>: push %ecx
0xb7fdcbf9 <__kernel_vsyscall+1>: push %edx
0xb7fdcbfa <__kernel_vsyscall+2>: push %ebp
0xb7fdcbfb <__kernel_vsyscall+3>: mov %esp,%ebp
0xb7fdcbfd <__kernel_vsyscall+5>: sysenter
0xb7fdcbff <__kernel_vsyscall+7>: nop
0xb7fdcc00 <__kernel_vsyscall+8>: nop
0xb7fdcc01 <__kernel_vsyscall+9>: nop
0xb7fdcc02 <__kernel_vsyscall+10>: nop
0xb7fdcc03 <__kernel_vsyscall+11>: nop
0xb7fdcc04 <__kernel_vsyscall+12>: nop
0xb7fdcc05 <__kernel_vsyscall+13>: nop
0xb7fdcc06 <__kernel_vsyscall+14>: int $0x80
0xb7fdcc08 <__kernel_vsyscall+16>: pop %ebp
0xb7fdcc09 <__kernel_vsyscall+17>: pop %edx
0xb7fdcc0a <__kernel_vsyscall+18>: pop %ecx
0xb7fdcc0b <__kernel_vsyscall+19>: ret
End of assembler dump.
I've seen this on 32-bit Fedora 23. I have not investigated what causes this
and whether we can avoid the gap in the first place. Let's first try to make
GDB handle such gaps more gracefully.
gdb/
* btrace.c (ftrace_new_return): Start from the previous function's level
if we can't find a matching call for a return.
2016-01-19 21:54:19 +08:00
|
|
|
returned but didn't. Let's start a new, separate back trace
|
|
|
|
from PREV's level. */
|
|
|
|
bfun->level = prev->level - 1;
|
|
|
|
|
|
|
|
/* We fix up the back trace for PREV but leave other function segments
|
|
|
|
on the same level as they are.
|
|
|
|
This should handle things like schedule () correctly where we're
|
|
|
|
switching contexts. */
|
2017-05-30 18:47:37 +08:00
|
|
|
prev->up = bfun->number;
|
btrace: preserve function level for unexpected returns
When encountering a return for which we have not seen a corresponding call, GDB
starts a new back trace from level -1, i.e. from the level of the first function
in the trace.
In the presence of trace gaps, this may cause some rather big jump.
(gdb) record function-call-history /c 192, +8
192 sbrk
193 brk
194 __x86.get_pc_thunk.bx
195 brk
196 __kernel_vsyscall
197 [disabled]
198 __kernel_vsyscall
199 brk
200 sbrk
This doesn't help to make things more clear. Let's remain on the same level
instead.
(gdb) record function-call-history /c 192, +8
192 sbrk
193 brk
194 __x86.get_pc_thunk.bx
195 brk
196 __kernel_vsyscall
197 [disabled]
198 __kernel_vsyscall
199 brk
200 sbrk
In this case it will look like we were able to connect the trace parts across
the disabled gap. We were not. More work is required to achieve this.
In the general case, the function-call history for the two trace parts won't
match. They may be off by a few levels or they may be entirely different. All
this patch does is to preserve the indentation level of the record
function-call-history command.
The disabled gap is caused by a sysenter not returning to the next instruction.
(gdb) record function-call-history /i 196, +1
196 __kernel_vsyscall inst 66515,66519
(gdb) record instruction-history 66515
66515 0xb7fdcbf8 <__kernel_vsyscall+0>: push %ecx
66516 0xb7fdcbf9 <__kernel_vsyscall+1>: push %edx
66517 0xb7fdcbfa <__kernel_vsyscall+2>: push %ebp
66518 0xb7fdcbfb <__kernel_vsyscall+3>: mov %esp,%ebp
66519 0xb7fdcbfd <__kernel_vsyscall+5>: sysenter
[disabled]
66520 0xb7fdcc08 <__kernel_vsyscall+16>: pop %ebp
66521 0xb7fdcc09 <__kernel_vsyscall+17>: pop %edx
66522 0xb7fdcc0a <__kernel_vsyscall+18>: pop %ecx
66523 0xb7fdcc0b <__kernel_vsyscall+19>: ret
66524 0xb7e8e09e <brk+30>: xchg %ecx,%ebx
(gdb) disassemble 0xb7fdcbf8, 0xb7fdcc0c
Dump of assembler code from 0xb7fdcbf8 to 0xb7fdcc0c:
0xb7fdcbf8 <__kernel_vsyscall+0>: push %ecx
0xb7fdcbf9 <__kernel_vsyscall+1>: push %edx
0xb7fdcbfa <__kernel_vsyscall+2>: push %ebp
0xb7fdcbfb <__kernel_vsyscall+3>: mov %esp,%ebp
0xb7fdcbfd <__kernel_vsyscall+5>: sysenter
0xb7fdcbff <__kernel_vsyscall+7>: nop
0xb7fdcc00 <__kernel_vsyscall+8>: nop
0xb7fdcc01 <__kernel_vsyscall+9>: nop
0xb7fdcc02 <__kernel_vsyscall+10>: nop
0xb7fdcc03 <__kernel_vsyscall+11>: nop
0xb7fdcc04 <__kernel_vsyscall+12>: nop
0xb7fdcc05 <__kernel_vsyscall+13>: nop
0xb7fdcc06 <__kernel_vsyscall+14>: int $0x80
0xb7fdcc08 <__kernel_vsyscall+16>: pop %ebp
0xb7fdcc09 <__kernel_vsyscall+17>: pop %edx
0xb7fdcc0a <__kernel_vsyscall+18>: pop %ecx
0xb7fdcc0b <__kernel_vsyscall+19>: ret
End of assembler dump.
I've seen this on 32-bit Fedora 23. I have not investigated what causes this
and whether we can avoid the gap in the first place. Let's first try to make
GDB handle such gaps more gracefully.
gdb/
* btrace.c (ftrace_new_return): Start from the previous function's level
if we can't find a matching call for a return.
2016-01-19 21:54:19 +08:00
|
|
|
prev->flags = BFUN_UP_LINKS_TO_RET;
|
2013-03-11 16:17:08 +08:00
|
|
|
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
ftrace_debug (bfun, "new return - unknown caller");
|
2013-03-11 16:17:08 +08:00
|
|
|
}
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
return bfun;
|
|
|
|
}
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
/* Add a new function segment for a function switch at the end of the trace.
|
2017-05-30 18:47:37 +08:00
|
|
|
BTINFO is the branch trace information for the current thread.
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
MFUN and FUN are the symbol information we have for this function. */
|
|
|
|
|
|
|
|
static struct btrace_function *
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_new_switch (struct btrace_thread_info *btinfo,
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
struct minimal_symbol *mfun,
|
|
|
|
struct symbol *fun)
|
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
struct btrace_function *prev, *bfun;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2017-01-30 16:16:27 +08:00
|
|
|
/* This is an unexplained function switch. We can't really be sure about the
|
|
|
|
call stack, yet the best I can think of right now is to preserve it. */
|
2017-05-30 18:47:37 +08:00
|
|
|
bfun = ftrace_new_function (btinfo, mfun, fun);
|
2017-05-30 18:47:37 +08:00
|
|
|
prev = ftrace_find_call_by_number (btinfo, bfun->number - 1);
|
2017-01-30 16:16:27 +08:00
|
|
|
bfun->up = prev->up;
|
|
|
|
bfun->flags = prev->flags;
|
2013-03-11 16:17:08 +08:00
|
|
|
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
ftrace_debug (bfun, "new switch");
|
|
|
|
|
|
|
|
return bfun;
|
|
|
|
}
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
/* Add a new function segment for a gap in the trace due to a decode error at
|
|
|
|
the end of the trace.
|
2017-05-30 18:47:37 +08:00
|
|
|
BTINFO is the branch trace information for the current thread.
|
record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
|
|
|
ERRCODE is the format-specific error code. */
|
|
|
|
|
|
|
|
static struct btrace_function *
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_new_gap (struct btrace_thread_info *btinfo, int errcode,
|
|
|
|
std::vector<unsigned int> &gaps)
|
record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
|
|
|
{
|
|
|
|
struct btrace_function *bfun;
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
if (btinfo->functions.empty ())
|
2017-05-30 18:47:37 +08:00
|
|
|
bfun = ftrace_new_function (btinfo, NULL, NULL);
|
2017-05-30 18:47:37 +08:00
|
|
|
else
|
|
|
|
{
|
|
|
|
/* We hijack the previous function segment if it was empty. */
|
2017-05-30 18:47:37 +08:00
|
|
|
bfun = &btinfo->functions.back ();
|
btrace: Store btrace_insn in an std::vector
Because it contains a non-POD type field (flags), the type btrace_insn
should be new'ed/delete'd. Replace the VEC (btrace_insn_s) in
btrace_function with an std::vector.
gdb/ChangeLog:
* btrace.h (btrace_insn_s, DEF_VEC_O (btrace_insn_s)): Remove.
(btrace_function) <insn>: Change type to use std::vector.
* btrace.c (ftrace_debug, ftrace_call_num_insn,
ftrace_find_call, ftrace_new_gap, ftrace_update_function,
ftrace_update_insns, ftrace_compute_global_level_offset,
btrace_stitch_bts, btrace_clear, btrace_insn_get,
btrace_insn_end, btrace_insn_next, btrace_insn_prev): Adjust to
change to std::vector.
(ftrace_update_insns): Adjust to change to std::vector, change
type of INSN parameter.
(btrace_compute_ftrace_bts): Adjust call to ftrace_update_insns.
* record-btrace.c (btrace_call_history_insn_range,
btrace_compute_src_line_range,
record_btrace_frame_prev_register): Adjust to change to
std::vector.
* python/py-record-btrace.c (recpy_bt_func_instructions): Adjust
to change to std::vector.
2017-09-04 16:46:36 +08:00
|
|
|
if (bfun->errcode != 0 || !bfun->insn.empty ())
|
2017-05-30 18:47:37 +08:00
|
|
|
bfun = ftrace_new_function (btinfo, NULL, NULL);
|
|
|
|
}
|
record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
|
|
|
|
|
|
|
bfun->errcode = errcode;
|
2017-05-30 18:47:37 +08:00
|
|
|
gaps.push_back (bfun->number);
|
record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
|
|
|
|
|
|
|
ftrace_debug (bfun, "new gap");
|
|
|
|
|
|
|
|
return bfun;
|
|
|
|
}
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
/* Update the current function segment at the end of the trace in BTINFO with
|
|
|
|
respect to the instruction at PC. This may create new function segments.
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
Return the chronologically latest function segment, never NULL. */
|
|
|
|
|
|
|
|
static struct btrace_function *
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_update_function (struct btrace_thread_info *btinfo, CORE_ADDR pc)
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
{
|
|
|
|
struct bound_minimal_symbol bmfun;
|
|
|
|
struct minimal_symbol *mfun;
|
|
|
|
struct symbol *fun;
|
2017-05-30 18:47:37 +08:00
|
|
|
struct btrace_function *bfun;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
|
|
|
/* Try to determine the function we're in. We use both types of symbols
|
|
|
|
to avoid surprises when we sometimes get a full symbol and sometimes
|
|
|
|
only a minimal symbol. */
|
|
|
|
fun = find_pc_function (pc);
|
|
|
|
bmfun = lookup_minimal_symbol_by_pc (pc);
|
|
|
|
mfun = bmfun.minsym;
|
|
|
|
|
|
|
|
if (fun == NULL && mfun == NULL)
|
|
|
|
DEBUG_FTRACE ("no symbol at %s", core_addr_to_string_nz (pc));
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
/* If we didn't have a function, we create one. */
|
|
|
|
if (btinfo->functions.empty ())
|
|
|
|
return ftrace_new_function (btinfo, mfun, fun);
|
|
|
|
|
|
|
|
/* If we had a gap before, we create a function. */
|
2017-05-30 18:47:37 +08:00
|
|
|
bfun = &btinfo->functions.back ();
|
2017-05-30 18:47:37 +08:00
|
|
|
if (bfun->errcode != 0)
|
2017-05-30 18:47:37 +08:00
|
|
|
return ftrace_new_function (btinfo, mfun, fun);
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
|
|
|
/* Check the last instruction, if we have one.
|
|
|
|
We do this check first, since it allows us to fill in the call stack
|
|
|
|
links in addition to the normal flow links. */
|
btrace: Store btrace_insn in an std::vector
Because it contains a non-POD type field (flags), the type btrace_insn
should be new'ed/delete'd. Replace the VEC (btrace_insn_s) in
btrace_function with an std::vector.
gdb/ChangeLog:
* btrace.h (btrace_insn_s, DEF_VEC_O (btrace_insn_s)): Remove.
(btrace_function) <insn>: Change type to use std::vector.
* btrace.c (ftrace_debug, ftrace_call_num_insn,
ftrace_find_call, ftrace_new_gap, ftrace_update_function,
ftrace_update_insns, ftrace_compute_global_level_offset,
btrace_stitch_bts, btrace_clear, btrace_insn_get,
btrace_insn_end, btrace_insn_next, btrace_insn_prev): Adjust to
change to std::vector.
(ftrace_update_insns): Adjust to change to std::vector, change
type of INSN parameter.
(btrace_compute_ftrace_bts): Adjust call to ftrace_update_insns.
* record-btrace.c (btrace_call_history_insn_range,
btrace_compute_src_line_range,
record_btrace_frame_prev_register): Adjust to change to
std::vector.
* python/py-record-btrace.c (recpy_bt_func_instructions): Adjust
to change to std::vector.
2017-09-04 16:46:36 +08:00
|
|
|
btrace_insn *last = NULL;
|
|
|
|
if (!bfun->insn.empty ())
|
|
|
|
last = &bfun->insn.back ();
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
|
|
|
if (last != NULL)
|
|
|
|
{
|
2014-01-29 19:56:09 +08:00
|
|
|
switch (last->iclass)
|
|
|
|
{
|
|
|
|
case BTRACE_INSN_RETURN:
|
2015-01-23 20:32:12 +08:00
|
|
|
{
|
|
|
|
const char *fname;
|
|
|
|
|
|
|
|
/* On some systems, _dl_runtime_resolve returns to the resolved
|
|
|
|
function instead of jumping to it. From our perspective,
|
|
|
|
however, this is a tailcall.
|
|
|
|
If we treated it as return, we wouldn't be able to find the
|
|
|
|
resolved function in our stack back trace. Hence, we would
|
|
|
|
lose the current stack back trace and start anew with an empty
|
|
|
|
back trace. When the resolved function returns, we would then
|
|
|
|
create a stack back trace with the same function names but
|
|
|
|
different frame id's. This will confuse stepping. */
|
|
|
|
fname = ftrace_print_function_name (bfun);
|
|
|
|
if (strcmp (fname, "_dl_runtime_resolve") == 0)
|
2017-05-30 18:47:37 +08:00
|
|
|
return ftrace_new_tailcall (btinfo, mfun, fun);
|
2015-01-23 20:32:12 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
return ftrace_new_return (btinfo, mfun, fun);
|
2015-01-23 20:32:12 +08:00
|
|
|
}
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2014-01-29 19:56:09 +08:00
|
|
|
case BTRACE_INSN_CALL:
|
|
|
|
/* Ignore calls to the next instruction. They are used for PIC. */
|
|
|
|
if (last->pc + last->size == pc)
|
|
|
|
break;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
return ftrace_new_call (btinfo, mfun, fun);
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2014-01-29 19:56:09 +08:00
|
|
|
case BTRACE_INSN_JUMP:
|
|
|
|
{
|
|
|
|
CORE_ADDR start;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2014-01-29 19:56:09 +08:00
|
|
|
start = get_pc_function_start (pc);
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2016-01-12 23:05:15 +08:00
|
|
|
/* A jump to the start of a function is (typically) a tail call. */
|
|
|
|
if (start == pc)
|
2017-05-30 18:47:37 +08:00
|
|
|
return ftrace_new_tailcall (btinfo, mfun, fun);
|
2016-01-12 23:05:15 +08:00
|
|
|
|
2014-01-29 19:56:09 +08:00
|
|
|
/* If we can't determine the function for PC, we treat a jump at
|
2016-01-12 23:05:15 +08:00
|
|
|
the end of the block as tail call if we're switching functions
|
|
|
|
and as an intra-function branch if we don't. */
|
|
|
|
if (start == 0 && ftrace_function_switched (bfun, mfun, fun))
|
2017-05-30 18:47:37 +08:00
|
|
|
return ftrace_new_tailcall (btinfo, mfun, fun);
|
2016-01-12 23:05:15 +08:00
|
|
|
|
|
|
|
break;
|
2014-01-29 19:56:09 +08:00
|
|
|
}
|
2013-03-11 16:17:08 +08:00
|
|
|
}
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Check if we're switching functions for some other reason. */
|
|
|
|
if (ftrace_function_switched (bfun, mfun, fun))
|
|
|
|
{
|
|
|
|
DEBUG_FTRACE ("switching from %s in %s at %s",
|
|
|
|
ftrace_print_insn_addr (last),
|
|
|
|
ftrace_print_function_name (bfun),
|
|
|
|
ftrace_print_filename (bfun));
|
2013-03-11 16:17:08 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
return ftrace_new_switch (btinfo, mfun, fun);
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
return bfun;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Add the instruction at PC to BFUN's instructions. */
|
|
|
|
|
|
|
|
static void
|
btrace: Store btrace_insn in an std::vector
Because it contains a non-POD type field (flags), the type btrace_insn
should be new'ed/delete'd. Replace the VEC (btrace_insn_s) in
btrace_function with an std::vector.
gdb/ChangeLog:
* btrace.h (btrace_insn_s, DEF_VEC_O (btrace_insn_s)): Remove.
(btrace_function) <insn>: Change type to use std::vector.
* btrace.c (ftrace_debug, ftrace_call_num_insn,
ftrace_find_call, ftrace_new_gap, ftrace_update_function,
ftrace_update_insns, ftrace_compute_global_level_offset,
btrace_stitch_bts, btrace_clear, btrace_insn_get,
btrace_insn_end, btrace_insn_next, btrace_insn_prev): Adjust to
change to std::vector.
(ftrace_update_insns): Adjust to change to std::vector, change
type of INSN parameter.
(btrace_compute_ftrace_bts): Adjust call to ftrace_update_insns.
* record-btrace.c (btrace_call_history_insn_range,
btrace_compute_src_line_range,
record_btrace_frame_prev_register): Adjust to change to
std::vector.
* python/py-record-btrace.c (recpy_bt_func_instructions): Adjust
to change to std::vector.
2017-09-04 16:46:36 +08:00
|
|
|
ftrace_update_insns (struct btrace_function *bfun, const btrace_insn &insn)
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
{
|
btrace: Store btrace_insn in an std::vector
Because it contains a non-POD type field (flags), the type btrace_insn
should be new'ed/delete'd. Replace the VEC (btrace_insn_s) in
btrace_function with an std::vector.
gdb/ChangeLog:
* btrace.h (btrace_insn_s, DEF_VEC_O (btrace_insn_s)): Remove.
(btrace_function) <insn>: Change type to use std::vector.
* btrace.c (ftrace_debug, ftrace_call_num_insn,
ftrace_find_call, ftrace_new_gap, ftrace_update_function,
ftrace_update_insns, ftrace_compute_global_level_offset,
btrace_stitch_bts, btrace_clear, btrace_insn_get,
btrace_insn_end, btrace_insn_next, btrace_insn_prev): Adjust to
change to std::vector.
(ftrace_update_insns): Adjust to change to std::vector, change
type of INSN parameter.
(btrace_compute_ftrace_bts): Adjust call to ftrace_update_insns.
* record-btrace.c (btrace_call_history_insn_range,
btrace_compute_src_line_range,
record_btrace_frame_prev_register): Adjust to change to
std::vector.
* python/py-record-btrace.c (recpy_bt_func_instructions): Adjust
to change to std::vector.
2017-09-04 16:46:36 +08:00
|
|
|
bfun->insn.push_back (insn);
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
|
|
|
if (record_debug > 1)
|
|
|
|
ftrace_debug (bfun, "update insn");
|
|
|
|
}
|
|
|
|
|
2014-01-29 19:56:09 +08:00
|
|
|
/* Classify the instruction at PC. */
|
|
|
|
|
|
|
|
static enum btrace_insn_class
|
|
|
|
ftrace_classify_insn (struct gdbarch *gdbarch, CORE_ADDR pc)
|
|
|
|
{
|
|
|
|
enum btrace_insn_class iclass;
|
|
|
|
|
|
|
|
iclass = BTRACE_INSN_OTHER;
|
Split TRY_CATCH into TRY + CATCH
This patch splits the TRY_CATCH macro into three, so that we go from
this:
~~~
volatile gdb_exception ex;
TRY_CATCH (ex, RETURN_MASK_ERROR)
{
}
if (ex.reason < 0)
{
}
~~~
to this:
~~~
TRY
{
}
CATCH (ex, RETURN_MASK_ERROR)
{
}
END_CATCH
~~~
Thus, we'll be getting rid of the local volatile exception object, and
declaring the caught exception in the catch block.
This allows reimplementing TRY/CATCH in terms of C++ exceptions when
building in C++ mode, while still allowing to build GDB in C mode
(using setjmp/longjmp), as a transition step.
TBC, after this patch, is it _not_ valid to have code between the TRY
and the CATCH blocks, like:
TRY
{
}
// some code here.
CATCH (ex, RETURN_MASK_ERROR)
{
}
END_CATCH
Just like it isn't valid to do that with C++'s native try/catch.
By switching to creating the exception object inside the CATCH block
scope, we can get rid of all the explicitly allocated volatile
exception objects all over the tree, and map the CATCH block more
directly to C++'s catch blocks.
The majority of the TRY_CATCH -> TRY+CATCH+END_CATCH conversion was
done with a script, rerun from scratch at every rebase, no manual
editing involved. After the mechanical conversion, a few places
needed manual intervention, to fix preexisting cases where we were
using the exception object outside of the TRY_CATCH block, and cases
where we were using "else" after a 'if (ex.reason) < 0)' [a CATCH
after this patch]. The result was folded into this patch so that GDB
still builds at each incremental step.
END_CATCH is necessary for two reasons:
First, because we name the exception object in the CATCH block, which
requires creating a scope, which in turn must be closed somewhere.
Declaring the exception variable in the initializer field of a for
block, like:
#define CATCH(EXCEPTION, mask) \
for (struct gdb_exception EXCEPTION; \
exceptions_state_mc_catch (&EXCEPTION, MASK); \
EXCEPTION = exception_none)
would avoid needing END_CATCH, but alas, in C mode, we build with C90,
which doesn't allow mixed declarations and code.
Second, because when TRY/CATCH are wired to real C++ try/catch, as
long as we need to handle cleanup chains, even if there's no CATCH
block that wants to catch the exception, we need for stop at every
frame in the unwind chain and run cleanups, then rethrow. That will
be done in END_CATCH.
After we require C++, we'll still need TRY/CATCH/END_CATCH until
cleanups are completely phased out -- TRY/CATCH in C++ mode will
save/restore the current cleanup chain, like in C mode, and END_CATCH
catches otherwise uncaugh exceptions, runs cleanups and rethrows, so
that C++ cleanups and exceptions can coexist.
IMO, this still makes the TRY/CATCH code look a bit more like a
newcomer would expect, so IMO worth it even if we weren't considering
C++.
gdb/ChangeLog.
2015-03-07 Pedro Alves <palves@redhat.com>
* common/common-exceptions.c (struct catcher) <exception>: No
longer a pointer to volatile exception. Now an exception value.
<mask>: Delete field.
(exceptions_state_mc_init): Remove all parameters. Adjust.
(exceptions_state_mc): No longer pop the catcher here.
(exceptions_state_mc_catch): New function.
(throw_exception): Adjust.
* common/common-exceptions.h (exceptions_state_mc_init): Remove
all parameters.
(exceptions_state_mc_catch): Declare.
(TRY_CATCH): Rename to ...
(TRY): ... this. Remove EXCEPTION and MASK parameters.
(CATCH, END_CATCH): New.
All callers adjusted.
gdb/gdbserver/ChangeLog:
2015-03-07 Pedro Alves <palves@redhat.com>
Adjust all callers of TRY_CATCH to use TRY/CATCH/END_CATCH
instead.
2015-03-07 23:14:14 +08:00
|
|
|
TRY
|
2014-01-29 19:56:09 +08:00
|
|
|
{
|
|
|
|
if (gdbarch_insn_is_call (gdbarch, pc))
|
|
|
|
iclass = BTRACE_INSN_CALL;
|
|
|
|
else if (gdbarch_insn_is_ret (gdbarch, pc))
|
|
|
|
iclass = BTRACE_INSN_RETURN;
|
|
|
|
else if (gdbarch_insn_is_jump (gdbarch, pc))
|
|
|
|
iclass = BTRACE_INSN_JUMP;
|
|
|
|
}
|
Split TRY_CATCH into TRY + CATCH
This patch splits the TRY_CATCH macro into three, so that we go from
this:
~~~
volatile gdb_exception ex;
TRY_CATCH (ex, RETURN_MASK_ERROR)
{
}
if (ex.reason < 0)
{
}
~~~
to this:
~~~
TRY
{
}
CATCH (ex, RETURN_MASK_ERROR)
{
}
END_CATCH
~~~
Thus, we'll be getting rid of the local volatile exception object, and
declaring the caught exception in the catch block.
This allows reimplementing TRY/CATCH in terms of C++ exceptions when
building in C++ mode, while still allowing to build GDB in C mode
(using setjmp/longjmp), as a transition step.
TBC, after this patch, is it _not_ valid to have code between the TRY
and the CATCH blocks, like:
TRY
{
}
// some code here.
CATCH (ex, RETURN_MASK_ERROR)
{
}
END_CATCH
Just like it isn't valid to do that with C++'s native try/catch.
By switching to creating the exception object inside the CATCH block
scope, we can get rid of all the explicitly allocated volatile
exception objects all over the tree, and map the CATCH block more
directly to C++'s catch blocks.
The majority of the TRY_CATCH -> TRY+CATCH+END_CATCH conversion was
done with a script, rerun from scratch at every rebase, no manual
editing involved. After the mechanical conversion, a few places
needed manual intervention, to fix preexisting cases where we were
using the exception object outside of the TRY_CATCH block, and cases
where we were using "else" after a 'if (ex.reason) < 0)' [a CATCH
after this patch]. The result was folded into this patch so that GDB
still builds at each incremental step.
END_CATCH is necessary for two reasons:
First, because we name the exception object in the CATCH block, which
requires creating a scope, which in turn must be closed somewhere.
Declaring the exception variable in the initializer field of a for
block, like:
#define CATCH(EXCEPTION, mask) \
for (struct gdb_exception EXCEPTION; \
exceptions_state_mc_catch (&EXCEPTION, MASK); \
EXCEPTION = exception_none)
would avoid needing END_CATCH, but alas, in C mode, we build with C90,
which doesn't allow mixed declarations and code.
Second, because when TRY/CATCH are wired to real C++ try/catch, as
long as we need to handle cleanup chains, even if there's no CATCH
block that wants to catch the exception, we need for stop at every
frame in the unwind chain and run cleanups, then rethrow. That will
be done in END_CATCH.
After we require C++, we'll still need TRY/CATCH/END_CATCH until
cleanups are completely phased out -- TRY/CATCH in C++ mode will
save/restore the current cleanup chain, like in C mode, and END_CATCH
catches otherwise uncaugh exceptions, runs cleanups and rethrows, so
that C++ cleanups and exceptions can coexist.
IMO, this still makes the TRY/CATCH code look a bit more like a
newcomer would expect, so IMO worth it even if we weren't considering
C++.
gdb/ChangeLog.
2015-03-07 Pedro Alves <palves@redhat.com>
* common/common-exceptions.c (struct catcher) <exception>: No
longer a pointer to volatile exception. Now an exception value.
<mask>: Delete field.
(exceptions_state_mc_init): Remove all parameters. Adjust.
(exceptions_state_mc): No longer pop the catcher here.
(exceptions_state_mc_catch): New function.
(throw_exception): Adjust.
* common/common-exceptions.h (exceptions_state_mc_init): Remove
all parameters.
(exceptions_state_mc_catch): Declare.
(TRY_CATCH): Rename to ...
(TRY): ... this. Remove EXCEPTION and MASK parameters.
(CATCH, END_CATCH): New.
All callers adjusted.
gdb/gdbserver/ChangeLog:
2015-03-07 Pedro Alves <palves@redhat.com>
Adjust all callers of TRY_CATCH to use TRY/CATCH/END_CATCH
instead.
2015-03-07 23:14:14 +08:00
|
|
|
CATCH (error, RETURN_MASK_ERROR)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
END_CATCH
|
2014-01-29 19:56:09 +08:00
|
|
|
|
|
|
|
return iclass;
|
|
|
|
}
|
|
|
|
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
/* Try to match the back trace at LHS to the back trace at RHS. Returns the
|
|
|
|
number of matching function segments or zero if the back traces do not
|
2017-05-30 18:47:37 +08:00
|
|
|
match. BTINFO is the branch trace information for the current thread. */
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
|
|
|
|
static int
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_match_backtrace (struct btrace_thread_info *btinfo,
|
|
|
|
struct btrace_function *lhs,
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
struct btrace_function *rhs)
|
|
|
|
{
|
|
|
|
int matches;
|
|
|
|
|
|
|
|
for (matches = 0; lhs != NULL && rhs != NULL; ++matches)
|
|
|
|
{
|
|
|
|
if (ftrace_function_switched (lhs, rhs->msym, rhs->sym))
|
|
|
|
return 0;
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
lhs = ftrace_get_caller (btinfo, lhs);
|
|
|
|
rhs = ftrace_get_caller (btinfo, rhs);
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
return matches;
|
|
|
|
}
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
/* Add ADJUSTMENT to the level of BFUN and succeeding function segments.
|
|
|
|
BTINFO is the branch trace information for the current thread. */
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
|
|
|
|
static void
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_fixup_level (struct btrace_thread_info *btinfo,
|
|
|
|
struct btrace_function *bfun, int adjustment)
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
{
|
|
|
|
if (adjustment == 0)
|
|
|
|
return;
|
|
|
|
|
|
|
|
DEBUG_FTRACE ("fixup level (%+d)", adjustment);
|
|
|
|
ftrace_debug (bfun, "..bfun");
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
while (bfun != NULL)
|
|
|
|
{
|
|
|
|
bfun->level += adjustment;
|
|
|
|
bfun = ftrace_find_call_by_number (btinfo, bfun->number + 1);
|
|
|
|
}
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Recompute the global level offset. Traverse the function trace and compute
|
|
|
|
the global level offset as the negative of the minimal function level. */
|
|
|
|
|
|
|
|
static void
|
|
|
|
ftrace_compute_global_level_offset (struct btrace_thread_info *btinfo)
|
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
int level = INT_MAX;
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
|
|
|
|
if (btinfo == NULL)
|
|
|
|
return;
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
if (btinfo->functions.empty ())
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
return;
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
unsigned int length = btinfo->functions.size() - 1;
|
|
|
|
for (unsigned int i = 0; i < length; ++i)
|
2017-05-30 18:47:37 +08:00
|
|
|
level = std::min (level, btinfo->functions[i].level);
|
2017-05-30 18:47:37 +08:00
|
|
|
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
/* The last function segment contains the current instruction, which is not
|
|
|
|
really part of the trace. If it contains just this one instruction, we
|
2017-05-30 18:47:37 +08:00
|
|
|
ignore the segment. */
|
2017-05-30 18:47:37 +08:00
|
|
|
struct btrace_function *last = &btinfo->functions.back();
|
btrace: Store btrace_insn in an std::vector
Because it contains a non-POD type field (flags), the type btrace_insn
should be new'ed/delete'd. Replace the VEC (btrace_insn_s) in
btrace_function with an std::vector.
gdb/ChangeLog:
* btrace.h (btrace_insn_s, DEF_VEC_O (btrace_insn_s)): Remove.
(btrace_function) <insn>: Change type to use std::vector.
* btrace.c (ftrace_debug, ftrace_call_num_insn,
ftrace_find_call, ftrace_new_gap, ftrace_update_function,
ftrace_update_insns, ftrace_compute_global_level_offset,
btrace_stitch_bts, btrace_clear, btrace_insn_get,
btrace_insn_end, btrace_insn_next, btrace_insn_prev): Adjust to
change to std::vector.
(ftrace_update_insns): Adjust to change to std::vector, change
type of INSN parameter.
(btrace_compute_ftrace_bts): Adjust call to ftrace_update_insns.
* record-btrace.c (btrace_call_history_insn_range,
btrace_compute_src_line_range,
record_btrace_frame_prev_register): Adjust to change to
std::vector.
* python/py-record-btrace.c (recpy_bt_func_instructions): Adjust
to change to std::vector.
2017-09-04 16:46:36 +08:00
|
|
|
if (last->insn.size () != 1)
|
2017-05-30 18:47:37 +08:00
|
|
|
level = std::min (level, last->level);
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
|
|
|
|
DEBUG_FTRACE ("setting global level offset: %d", -level);
|
|
|
|
btinfo->level = -level;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Connect the function segments PREV and NEXT in a bottom-to-top walk as in
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_connect_backtrace. BTINFO is the branch trace information for the
|
|
|
|
current thread. */
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
|
|
|
|
static void
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_connect_bfun (struct btrace_thread_info *btinfo,
|
|
|
|
struct btrace_function *prev,
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
struct btrace_function *next)
|
|
|
|
{
|
|
|
|
DEBUG_FTRACE ("connecting...");
|
|
|
|
ftrace_debug (prev, "..prev");
|
|
|
|
ftrace_debug (next, "..next");
|
|
|
|
|
|
|
|
/* The function segments are not yet connected. */
|
2017-05-30 18:47:37 +08:00
|
|
|
gdb_assert (prev->next == 0);
|
|
|
|
gdb_assert (next->prev == 0);
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
prev->next = next->number;
|
|
|
|
next->prev = prev->number;
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
|
|
|
|
/* We may have moved NEXT to a different function level. */
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_fixup_level (btinfo, next, prev->level - next->level);
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
|
|
|
|
/* If we run out of back trace for one, let's use the other's. */
|
2017-05-30 18:47:37 +08:00
|
|
|
if (prev->up == 0)
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
const btrace_function_flags flags = next->flags;
|
|
|
|
|
|
|
|
next = ftrace_find_call_by_number (btinfo, next->up);
|
|
|
|
if (next != NULL)
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
{
|
|
|
|
DEBUG_FTRACE ("using next's callers");
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_fixup_caller (btinfo, prev, next, flags);
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
}
|
|
|
|
}
|
2017-05-30 18:47:37 +08:00
|
|
|
else if (next->up == 0)
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
const btrace_function_flags flags = prev->flags;
|
|
|
|
|
|
|
|
prev = ftrace_find_call_by_number (btinfo, prev->up);
|
|
|
|
if (prev != NULL)
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
{
|
|
|
|
DEBUG_FTRACE ("using prev's callers");
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_fixup_caller (btinfo, next, prev, flags);
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
/* PREV may have a tailcall caller, NEXT can't. If it does, fixup the up
|
|
|
|
link to add the tail callers to NEXT's back trace.
|
|
|
|
|
|
|
|
This removes NEXT->UP from NEXT's back trace. It will be added back
|
|
|
|
when connecting NEXT and PREV's callers - provided they exist.
|
|
|
|
|
|
|
|
If PREV's back trace consists of a series of tail calls without an
|
|
|
|
actual call, there will be no further connection and NEXT's caller will
|
|
|
|
be removed for good. To catch this case, we handle it here and connect
|
|
|
|
the top of PREV's back trace to NEXT's caller. */
|
|
|
|
if ((prev->flags & BFUN_UP_LINKS_TO_TAILCALL) != 0)
|
|
|
|
{
|
|
|
|
struct btrace_function *caller;
|
2017-05-30 18:47:37 +08:00
|
|
|
btrace_function_flags next_flags, prev_flags;
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
|
|
|
|
/* We checked NEXT->UP above so CALLER can't be NULL. */
|
2017-05-30 18:47:37 +08:00
|
|
|
caller = ftrace_find_call_by_number (btinfo, next->up);
|
|
|
|
next_flags = next->flags;
|
|
|
|
prev_flags = prev->flags;
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
|
|
|
|
DEBUG_FTRACE ("adding prev's tail calls to next");
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
prev = ftrace_find_call_by_number (btinfo, prev->up);
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_fixup_caller (btinfo, next, prev, prev_flags);
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
for (; prev != NULL; prev = ftrace_find_call_by_number (btinfo,
|
|
|
|
prev->up))
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
{
|
|
|
|
/* At the end of PREV's back trace, continue with CALLER. */
|
2017-05-30 18:47:37 +08:00
|
|
|
if (prev->up == 0)
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
{
|
|
|
|
DEBUG_FTRACE ("fixing up link for tailcall chain");
|
|
|
|
ftrace_debug (prev, "..top");
|
|
|
|
ftrace_debug (caller, "..up");
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_fixup_caller (btinfo, prev, caller, next_flags);
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
|
|
|
|
/* If we skipped any tail calls, this may move CALLER to a
|
|
|
|
different function level.
|
|
|
|
|
|
|
|
Note that changing CALLER's level is only OK because we
|
|
|
|
know that this is the last iteration of the bottom-to-top
|
|
|
|
walk in ftrace_connect_backtrace.
|
|
|
|
|
|
|
|
Otherwise we will fix up CALLER's level when we connect it
|
|
|
|
to PREV's caller in the next iteration. */
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_fixup_level (btinfo, caller,
|
|
|
|
prev->level - caller->level - 1);
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* There's nothing to do if we find a real call. */
|
|
|
|
if ((prev->flags & BFUN_UP_LINKS_TO_TAILCALL) == 0)
|
|
|
|
{
|
|
|
|
DEBUG_FTRACE ("will fix up link in next iteration");
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Connect function segments on the same level in the back trace at LHS and RHS.
|
|
|
|
The back traces at LHS and RHS are expected to match according to
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_match_backtrace. BTINFO is the branch trace information for the
|
|
|
|
current thread. */
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
|
|
|
|
static void
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_connect_backtrace (struct btrace_thread_info *btinfo,
|
|
|
|
struct btrace_function *lhs,
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
struct btrace_function *rhs)
|
|
|
|
{
|
|
|
|
while (lhs != NULL && rhs != NULL)
|
|
|
|
{
|
|
|
|
struct btrace_function *prev, *next;
|
|
|
|
|
|
|
|
gdb_assert (!ftrace_function_switched (lhs, rhs->msym, rhs->sym));
|
|
|
|
|
|
|
|
/* Connecting LHS and RHS may change the up link. */
|
|
|
|
prev = lhs;
|
|
|
|
next = rhs;
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
lhs = ftrace_get_caller (btinfo, lhs);
|
|
|
|
rhs = ftrace_get_caller (btinfo, rhs);
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_connect_bfun (btinfo, prev, next);
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Bridge the gap between two function segments left and right of a gap if their
|
2017-05-30 18:47:37 +08:00
|
|
|
respective back traces match in at least MIN_MATCHES functions. BTINFO is
|
|
|
|
the branch trace information for the current thread.
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
|
|
|
|
Returns non-zero if the gap could be bridged, zero otherwise. */
|
|
|
|
|
|
|
|
static int
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_bridge_gap (struct btrace_thread_info *btinfo,
|
|
|
|
struct btrace_function *lhs, struct btrace_function *rhs,
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
int min_matches)
|
|
|
|
{
|
|
|
|
struct btrace_function *best_l, *best_r, *cand_l, *cand_r;
|
|
|
|
int best_matches;
|
|
|
|
|
|
|
|
DEBUG_FTRACE ("checking gap at insn %u (req matches: %d)",
|
|
|
|
rhs->insn_offset - 1, min_matches);
|
|
|
|
|
|
|
|
best_matches = 0;
|
|
|
|
best_l = NULL;
|
|
|
|
best_r = NULL;
|
|
|
|
|
|
|
|
/* We search the back traces of LHS and RHS for valid connections and connect
|
|
|
|
the two functon segments that give the longest combined back trace. */
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
for (cand_l = lhs; cand_l != NULL;
|
|
|
|
cand_l = ftrace_get_caller (btinfo, cand_l))
|
|
|
|
for (cand_r = rhs; cand_r != NULL;
|
|
|
|
cand_r = ftrace_get_caller (btinfo, cand_r))
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
{
|
|
|
|
int matches;
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
matches = ftrace_match_backtrace (btinfo, cand_l, cand_r);
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
if (best_matches < matches)
|
|
|
|
{
|
|
|
|
best_matches = matches;
|
|
|
|
best_l = cand_l;
|
|
|
|
best_r = cand_r;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* We need at least MIN_MATCHES matches. */
|
|
|
|
gdb_assert (min_matches > 0);
|
|
|
|
if (best_matches < min_matches)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
DEBUG_FTRACE ("..matches: %d", best_matches);
|
|
|
|
|
|
|
|
/* We will fix up the level of BEST_R and succeeding function segments such
|
|
|
|
that BEST_R's level matches BEST_L's when we connect BEST_L to BEST_R.
|
|
|
|
|
|
|
|
This will ignore the level of RHS and following if BEST_R != RHS. I.e. if
|
|
|
|
BEST_R is a successor of RHS in the back trace of RHS (phases 1 and 3).
|
|
|
|
|
|
|
|
To catch this, we already fix up the level here where we can start at RHS
|
|
|
|
instead of at BEST_R. We will ignore the level fixup when connecting
|
|
|
|
BEST_L to BEST_R as they will already be on the same level. */
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_fixup_level (btinfo, rhs, best_l->level - best_r->level);
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_connect_backtrace (btinfo, best_l, best_r);
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
|
|
|
|
return best_matches;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Try to bridge gaps due to overflow or decode errors by connecting the
|
|
|
|
function segments that are separated by the gap. */
|
|
|
|
|
|
|
|
static void
|
2017-05-30 18:47:37 +08:00
|
|
|
btrace_bridge_gaps (struct thread_info *tp, std::vector<unsigned int> &gaps)
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
struct btrace_thread_info *btinfo = &tp->btrace;
|
2017-05-30 18:47:37 +08:00
|
|
|
std::vector<unsigned int> remaining;
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
int min_matches;
|
|
|
|
|
|
|
|
DEBUG ("bridge gaps");
|
|
|
|
|
|
|
|
/* We require a minimum amount of matches for bridging a gap. The number of
|
|
|
|
required matches will be lowered with each iteration.
|
|
|
|
|
|
|
|
The more matches the higher our confidence that the bridging is correct.
|
|
|
|
For big gaps or small traces, however, it may not be feasible to require a
|
|
|
|
high number of matches. */
|
|
|
|
for (min_matches = 5; min_matches > 0; --min_matches)
|
|
|
|
{
|
|
|
|
/* Let's try to bridge as many gaps as we can. In some cases, we need to
|
|
|
|
skip a gap and revisit it again after we closed later gaps. */
|
2017-05-30 18:47:37 +08:00
|
|
|
while (!gaps.empty ())
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
for (const unsigned int number : gaps)
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
struct btrace_function *gap, *lhs, *rhs;
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
int bridged;
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
gap = ftrace_find_call_by_number (btinfo, number);
|
|
|
|
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
/* We may have a sequence of gaps if we run from one error into
|
|
|
|
the next as we try to re-sync onto the trace stream. Ignore
|
|
|
|
all but the leftmost gap in such a sequence.
|
|
|
|
|
|
|
|
Also ignore gaps at the beginning of the trace. */
|
2017-05-30 18:47:37 +08:00
|
|
|
lhs = ftrace_find_call_by_number (btinfo, gap->number - 1);
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
if (lhs == NULL || lhs->errcode != 0)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
/* Skip gaps to the right. */
|
2017-05-30 18:47:37 +08:00
|
|
|
rhs = ftrace_find_call_by_number (btinfo, gap->number + 1);
|
|
|
|
while (rhs != NULL && rhs->errcode != 0)
|
|
|
|
rhs = ftrace_find_call_by_number (btinfo, rhs->number + 1);
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
|
|
|
|
/* Ignore gaps at the end of the trace. */
|
|
|
|
if (rhs == NULL)
|
|
|
|
continue;
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
bridged = ftrace_bridge_gap (btinfo, lhs, rhs, min_matches);
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
|
|
|
|
/* Keep track of gaps we were not able to bridge and try again.
|
|
|
|
If we just pushed them to the end of GAPS we would risk an
|
|
|
|
infinite loop in case we simply cannot bridge a gap. */
|
|
|
|
if (bridged == 0)
|
2017-05-30 18:47:37 +08:00
|
|
|
remaining.push_back (number);
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Let's see if we made any progress. */
|
2017-05-30 18:47:37 +08:00
|
|
|
if (remaining.size () == gaps.size ())
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
break;
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
gaps.clear ();
|
|
|
|
gaps.swap (remaining);
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* We get here if either GAPS is empty or if GAPS equals REMAINING. */
|
2017-05-30 18:47:37 +08:00
|
|
|
if (gaps.empty ())
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
break;
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
remaining.clear ();
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* We may omit this in some cases. Not sure it is worth the extra
|
|
|
|
complication, though. */
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_compute_global_level_offset (btinfo);
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
}
|
|
|
|
|
2013-11-13 22:31:07 +08:00
|
|
|
/* Compute the function branch trace from BTS trace. */
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
|
|
|
static void
|
2014-01-29 18:12:06 +08:00
|
|
|
btrace_compute_ftrace_bts (struct thread_info *tp,
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
const struct btrace_data_bts *btrace,
|
2017-05-30 18:47:37 +08:00
|
|
|
std::vector<unsigned int> &gaps)
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
{
|
2014-01-29 18:12:06 +08:00
|
|
|
struct btrace_thread_info *btinfo;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
struct gdbarch *gdbarch;
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
unsigned int blk;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
int level;
|
|
|
|
|
|
|
|
gdbarch = target_gdbarch ();
|
2014-01-29 18:12:06 +08:00
|
|
|
btinfo = &tp->btrace;
|
2013-11-13 22:31:07 +08:00
|
|
|
blk = VEC_length (btrace_block_s, btrace->blocks);
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
if (btinfo->functions.empty ())
|
|
|
|
level = INT_MAX;
|
|
|
|
else
|
|
|
|
level = -btinfo->level;
|
|
|
|
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
while (blk != 0)
|
|
|
|
{
|
|
|
|
btrace_block_s *block;
|
|
|
|
CORE_ADDR pc;
|
|
|
|
|
|
|
|
blk -= 1;
|
|
|
|
|
2013-11-13 22:31:07 +08:00
|
|
|
block = VEC_index (btrace_block_s, btrace->blocks, blk);
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
pc = block->begin;
|
|
|
|
|
|
|
|
for (;;)
|
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
struct btrace_function *bfun;
|
2014-01-29 19:56:09 +08:00
|
|
|
struct btrace_insn insn;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
int size;
|
|
|
|
|
|
|
|
/* We should hit the end of the block. Warn if we went too far. */
|
|
|
|
if (block->end < pc)
|
|
|
|
{
|
2016-01-18 23:59:21 +08:00
|
|
|
/* Indicate the gap in the trace. */
|
2017-05-30 18:47:37 +08:00
|
|
|
bfun = ftrace_new_gap (btinfo, BDE_BTS_OVERFLOW, gaps);
|
2016-01-18 23:59:21 +08:00
|
|
|
|
|
|
|
warning (_("Recorded trace may be corrupted at instruction "
|
2017-05-30 18:47:37 +08:00
|
|
|
"%u (pc = %s)."), bfun->insn_offset - 1,
|
2016-01-18 23:59:21 +08:00
|
|
|
core_addr_to_string_nz (pc));
|
2016-01-12 17:44:37 +08:00
|
|
|
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
bfun = ftrace_update_function (btinfo, pc);
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2013-04-18 16:58:05 +08:00
|
|
|
/* Maintain the function level offset.
|
|
|
|
For all but the last block, we do it here. */
|
|
|
|
if (blk != 0)
|
2017-05-30 18:47:37 +08:00
|
|
|
level = std::min (level, bfun->level);
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2014-01-29 19:56:09 +08:00
|
|
|
size = 0;
|
Split TRY_CATCH into TRY + CATCH
This patch splits the TRY_CATCH macro into three, so that we go from
this:
~~~
volatile gdb_exception ex;
TRY_CATCH (ex, RETURN_MASK_ERROR)
{
}
if (ex.reason < 0)
{
}
~~~
to this:
~~~
TRY
{
}
CATCH (ex, RETURN_MASK_ERROR)
{
}
END_CATCH
~~~
Thus, we'll be getting rid of the local volatile exception object, and
declaring the caught exception in the catch block.
This allows reimplementing TRY/CATCH in terms of C++ exceptions when
building in C++ mode, while still allowing to build GDB in C mode
(using setjmp/longjmp), as a transition step.
TBC, after this patch, is it _not_ valid to have code between the TRY
and the CATCH blocks, like:
TRY
{
}
// some code here.
CATCH (ex, RETURN_MASK_ERROR)
{
}
END_CATCH
Just like it isn't valid to do that with C++'s native try/catch.
By switching to creating the exception object inside the CATCH block
scope, we can get rid of all the explicitly allocated volatile
exception objects all over the tree, and map the CATCH block more
directly to C++'s catch blocks.
The majority of the TRY_CATCH -> TRY+CATCH+END_CATCH conversion was
done with a script, rerun from scratch at every rebase, no manual
editing involved. After the mechanical conversion, a few places
needed manual intervention, to fix preexisting cases where we were
using the exception object outside of the TRY_CATCH block, and cases
where we were using "else" after a 'if (ex.reason) < 0)' [a CATCH
after this patch]. The result was folded into this patch so that GDB
still builds at each incremental step.
END_CATCH is necessary for two reasons:
First, because we name the exception object in the CATCH block, which
requires creating a scope, which in turn must be closed somewhere.
Declaring the exception variable in the initializer field of a for
block, like:
#define CATCH(EXCEPTION, mask) \
for (struct gdb_exception EXCEPTION; \
exceptions_state_mc_catch (&EXCEPTION, MASK); \
EXCEPTION = exception_none)
would avoid needing END_CATCH, but alas, in C mode, we build with C90,
which doesn't allow mixed declarations and code.
Second, because when TRY/CATCH are wired to real C++ try/catch, as
long as we need to handle cleanup chains, even if there's no CATCH
block that wants to catch the exception, we need for stop at every
frame in the unwind chain and run cleanups, then rethrow. That will
be done in END_CATCH.
After we require C++, we'll still need TRY/CATCH/END_CATCH until
cleanups are completely phased out -- TRY/CATCH in C++ mode will
save/restore the current cleanup chain, like in C mode, and END_CATCH
catches otherwise uncaugh exceptions, runs cleanups and rethrows, so
that C++ cleanups and exceptions can coexist.
IMO, this still makes the TRY/CATCH code look a bit more like a
newcomer would expect, so IMO worth it even if we weren't considering
C++.
gdb/ChangeLog.
2015-03-07 Pedro Alves <palves@redhat.com>
* common/common-exceptions.c (struct catcher) <exception>: No
longer a pointer to volatile exception. Now an exception value.
<mask>: Delete field.
(exceptions_state_mc_init): Remove all parameters. Adjust.
(exceptions_state_mc): No longer pop the catcher here.
(exceptions_state_mc_catch): New function.
(throw_exception): Adjust.
* common/common-exceptions.h (exceptions_state_mc_init): Remove
all parameters.
(exceptions_state_mc_catch): Declare.
(TRY_CATCH): Rename to ...
(TRY): ... this. Remove EXCEPTION and MASK parameters.
(CATCH, END_CATCH): New.
All callers adjusted.
gdb/gdbserver/ChangeLog:
2015-03-07 Pedro Alves <palves@redhat.com>
Adjust all callers of TRY_CATCH to use TRY/CATCH/END_CATCH
instead.
2015-03-07 23:14:14 +08:00
|
|
|
TRY
|
|
|
|
{
|
|
|
|
size = gdb_insn_length (gdbarch, pc);
|
|
|
|
}
|
|
|
|
CATCH (error, RETURN_MASK_ERROR)
|
|
|
|
{
|
|
|
|
}
|
|
|
|
END_CATCH
|
2014-01-29 19:56:09 +08:00
|
|
|
|
|
|
|
insn.pc = pc;
|
|
|
|
insn.size = size;
|
|
|
|
insn.iclass = ftrace_classify_insn (gdbarch, pc);
|
2014-03-19 20:49:58 +08:00
|
|
|
insn.flags = 0;
|
2014-01-29 19:56:09 +08:00
|
|
|
|
btrace: Store btrace_insn in an std::vector
Because it contains a non-POD type field (flags), the type btrace_insn
should be new'ed/delete'd. Replace the VEC (btrace_insn_s) in
btrace_function with an std::vector.
gdb/ChangeLog:
* btrace.h (btrace_insn_s, DEF_VEC_O (btrace_insn_s)): Remove.
(btrace_function) <insn>: Change type to use std::vector.
* btrace.c (ftrace_debug, ftrace_call_num_insn,
ftrace_find_call, ftrace_new_gap, ftrace_update_function,
ftrace_update_insns, ftrace_compute_global_level_offset,
btrace_stitch_bts, btrace_clear, btrace_insn_get,
btrace_insn_end, btrace_insn_next, btrace_insn_prev): Adjust to
change to std::vector.
(ftrace_update_insns): Adjust to change to std::vector, change
type of INSN parameter.
(btrace_compute_ftrace_bts): Adjust call to ftrace_update_insns.
* record-btrace.c (btrace_call_history_insn_range,
btrace_compute_src_line_range,
record_btrace_frame_prev_register): Adjust to change to
std::vector.
* python/py-record-btrace.c (recpy_bt_func_instructions): Adjust
to change to std::vector.
2017-09-04 16:46:36 +08:00
|
|
|
ftrace_update_insns (bfun, insn);
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
|
|
|
/* We're done once we pushed the instruction at the end. */
|
|
|
|
if (block->end == pc)
|
|
|
|
break;
|
|
|
|
|
2014-01-29 19:56:09 +08:00
|
|
|
/* We can't continue if we fail to compute the size. */
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
if (size <= 0)
|
|
|
|
{
|
record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
|
|
|
/* Indicate the gap in the trace. We just added INSN so we're
|
|
|
|
not at the beginning. */
|
2017-05-30 18:47:37 +08:00
|
|
|
bfun = ftrace_new_gap (btinfo, BDE_BTS_INSN_SIZE, gaps);
|
record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
|
|
|
|
2016-01-12 17:44:37 +08:00
|
|
|
warning (_("Recorded trace may be incomplete at instruction %u "
|
2017-05-30 18:47:37 +08:00
|
|
|
"(pc = %s)."), bfun->insn_offset - 1,
|
2016-01-12 17:44:37 +08:00
|
|
|
core_addr_to_string_nz (pc));
|
|
|
|
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
pc += size;
|
2013-04-18 16:58:05 +08:00
|
|
|
|
|
|
|
/* Maintain the function level offset.
|
|
|
|
For the last block, we do it here to not consider the last
|
|
|
|
instruction.
|
|
|
|
Since the last instruction corresponds to the current instruction
|
|
|
|
and is not really part of the execution history, it shouldn't
|
|
|
|
affect the level. */
|
|
|
|
if (blk == 0)
|
2017-05-30 18:47:37 +08:00
|
|
|
level = std::min (level, bfun->level);
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
}
|
2013-03-11 16:17:08 +08:00
|
|
|
}
|
|
|
|
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
/* LEVEL is the minimal function level of all btrace function segments.
|
|
|
|
Define the global level offset to -LEVEL so all function levels are
|
|
|
|
normalized to start at zero. */
|
|
|
|
btinfo->level = -level;
|
2013-03-11 16:17:08 +08:00
|
|
|
}
|
|
|
|
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
#if defined (HAVE_LIBIPT)
|
|
|
|
|
|
|
|
static enum btrace_insn_class
|
|
|
|
pt_reclassify_insn (enum pt_insn_class iclass)
|
|
|
|
{
|
|
|
|
switch (iclass)
|
|
|
|
{
|
|
|
|
case ptic_call:
|
|
|
|
return BTRACE_INSN_CALL;
|
|
|
|
|
|
|
|
case ptic_return:
|
|
|
|
return BTRACE_INSN_RETURN;
|
|
|
|
|
|
|
|
case ptic_jump:
|
|
|
|
return BTRACE_INSN_JUMP;
|
|
|
|
|
|
|
|
default:
|
|
|
|
return BTRACE_INSN_OTHER;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-03-19 20:49:58 +08:00
|
|
|
/* Return the btrace instruction flags for INSN. */
|
|
|
|
|
2016-04-16 04:14:07 +08:00
|
|
|
static btrace_insn_flags
|
2017-04-25 08:27:42 +08:00
|
|
|
pt_btrace_insn_flags (const struct pt_insn &insn)
|
2014-03-19 20:49:58 +08:00
|
|
|
{
|
2016-04-16 04:14:07 +08:00
|
|
|
btrace_insn_flags flags = 0;
|
2014-03-19 20:49:58 +08:00
|
|
|
|
2017-04-25 08:27:42 +08:00
|
|
|
if (insn.speculative)
|
2014-03-19 20:49:58 +08:00
|
|
|
flags |= BTRACE_INSN_FLAG_SPECULATIVE;
|
|
|
|
|
|
|
|
return flags;
|
|
|
|
}
|
|
|
|
|
2017-04-25 08:27:42 +08:00
|
|
|
/* Return the btrace instruction for INSN. */
|
|
|
|
|
|
|
|
static btrace_insn
|
|
|
|
pt_btrace_insn (const struct pt_insn &insn)
|
|
|
|
{
|
|
|
|
return {(CORE_ADDR) insn.ip, (gdb_byte) insn.size,
|
|
|
|
pt_reclassify_insn (insn.iclass),
|
|
|
|
pt_btrace_insn_flags (insn)};
|
|
|
|
}
|
|
|
|
|
2016-11-21 21:27:57 +08:00
|
|
|
/* Handle instruction decode events (libipt-v2). */
|
|
|
|
|
|
|
|
static int
|
|
|
|
handle_pt_insn_events (struct btrace_thread_info *btinfo,
|
|
|
|
struct pt_insn_decoder *decoder,
|
|
|
|
std::vector<unsigned int> &gaps, int status)
|
|
|
|
{
|
|
|
|
#if defined (HAVE_PT_INSN_EVENT)
|
|
|
|
while (status & pts_event_pending)
|
|
|
|
{
|
|
|
|
struct btrace_function *bfun;
|
|
|
|
struct pt_event event;
|
|
|
|
uint64_t offset;
|
|
|
|
|
|
|
|
status = pt_insn_event (decoder, &event, sizeof (event));
|
|
|
|
if (status < 0)
|
|
|
|
break;
|
|
|
|
|
|
|
|
switch (event.type)
|
|
|
|
{
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ptev_enabled:
|
|
|
|
if (event.variant.enabled.resumed == 0 && !btinfo->functions.empty ())
|
|
|
|
{
|
|
|
|
bfun = ftrace_new_gap (btinfo, BDE_PT_DISABLED, gaps);
|
|
|
|
|
|
|
|
pt_insn_get_offset (decoder, &offset);
|
|
|
|
|
|
|
|
warning (_("Non-contiguous trace at instruction %u (offset = 0x%"
|
|
|
|
PRIx64 ")."), bfun->insn_offset - 1, offset);
|
|
|
|
}
|
|
|
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ptev_overflow:
|
|
|
|
bfun = ftrace_new_gap (btinfo, BDE_PT_OVERFLOW, gaps);
|
|
|
|
|
|
|
|
pt_insn_get_offset (decoder, &offset);
|
|
|
|
|
|
|
|
warning (_("Overflow at instruction %u (offset = 0x%" PRIx64 ")."),
|
|
|
|
bfun->insn_offset - 1, offset);
|
|
|
|
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif /* defined (HAVE_PT_INSN_EVENT) */
|
|
|
|
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Handle events indicated by flags in INSN (libipt-v1). */
|
|
|
|
|
|
|
|
static void
|
|
|
|
handle_pt_insn_event_flags (struct btrace_thread_info *btinfo,
|
|
|
|
struct pt_insn_decoder *decoder,
|
|
|
|
const struct pt_insn &insn,
|
|
|
|
std::vector<unsigned int> &gaps)
|
|
|
|
{
|
|
|
|
#if defined (HAVE_STRUCT_PT_INSN_ENABLED)
|
|
|
|
/* Tracing is disabled and re-enabled each time we enter the kernel. Most
|
|
|
|
times, we continue from the same instruction we stopped before. This is
|
|
|
|
indicated via the RESUMED instruction flag. The ENABLED instruction flag
|
|
|
|
means that we continued from some other instruction. Indicate this as a
|
|
|
|
trace gap except when tracing just started. */
|
|
|
|
if (insn.enabled && !btinfo->functions.empty ())
|
|
|
|
{
|
|
|
|
struct btrace_function *bfun;
|
|
|
|
uint64_t offset;
|
|
|
|
|
|
|
|
bfun = ftrace_new_gap (btinfo, BDE_PT_DISABLED, gaps);
|
|
|
|
|
|
|
|
pt_insn_get_offset (decoder, &offset);
|
|
|
|
|
|
|
|
warning (_("Non-contiguous trace at instruction %u (offset = 0x%" PRIx64
|
|
|
|
", pc = 0x%" PRIx64 ")."), bfun->insn_offset - 1, offset,
|
|
|
|
insn.ip);
|
|
|
|
}
|
|
|
|
#endif /* defined (HAVE_STRUCT_PT_INSN_ENABLED) */
|
|
|
|
|
|
|
|
#if defined (HAVE_STRUCT_PT_INSN_RESYNCED)
|
|
|
|
/* Indicate trace overflows. */
|
|
|
|
if (insn.resynced)
|
|
|
|
{
|
|
|
|
struct btrace_function *bfun;
|
|
|
|
uint64_t offset;
|
|
|
|
|
|
|
|
bfun = ftrace_new_gap (btinfo, BDE_PT_OVERFLOW, gaps);
|
|
|
|
|
|
|
|
pt_insn_get_offset (decoder, &offset);
|
|
|
|
|
|
|
|
warning (_("Overflow at instruction %u (offset = 0x%" PRIx64 ", pc = 0x%"
|
|
|
|
PRIx64 ")."), bfun->insn_offset - 1, offset, insn.ip);
|
|
|
|
}
|
|
|
|
#endif /* defined (HAVE_STRUCT_PT_INSN_RESYNCED) */
|
|
|
|
}
|
2017-04-25 08:27:42 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
/* Add function branch trace to BTINFO using DECODER. */
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
|
|
|
|
static void
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_add_pt (struct btrace_thread_info *btinfo,
|
|
|
|
struct pt_insn_decoder *decoder,
|
2017-05-30 18:47:37 +08:00
|
|
|
int *plevel,
|
2017-05-30 18:47:37 +08:00
|
|
|
std::vector<unsigned int> &gaps)
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
struct btrace_function *bfun;
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
uint64_t offset;
|
2016-11-21 21:27:57 +08:00
|
|
|
int status;
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
|
|
|
|
for (;;)
|
|
|
|
{
|
|
|
|
struct pt_insn insn;
|
|
|
|
|
2016-11-21 21:27:57 +08:00
|
|
|
status = pt_insn_sync_forward (decoder);
|
|
|
|
if (status < 0)
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
{
|
2016-11-21 21:27:57 +08:00
|
|
|
if (status != -pte_eos)
|
2016-01-12 23:03:11 +08:00
|
|
|
warning (_("Failed to synchronize onto the Intel Processor "
|
2016-11-21 21:27:57 +08:00
|
|
|
"Trace stream: %s."), pt_errstr (pt_errcode (status)));
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
for (;;)
|
|
|
|
{
|
2016-11-21 21:27:57 +08:00
|
|
|
/* Handle events from the previous iteration or synchronization. */
|
|
|
|
status = handle_pt_insn_events (btinfo, decoder, gaps, status);
|
|
|
|
if (status < 0)
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
break;
|
|
|
|
|
2016-11-21 21:27:57 +08:00
|
|
|
status = pt_insn_next (decoder, &insn, sizeof(insn));
|
|
|
|
if (status < 0)
|
|
|
|
break;
|
2016-01-18 23:59:21 +08:00
|
|
|
|
2016-11-21 21:27:57 +08:00
|
|
|
/* Handle events indicated by flags in INSN. */
|
|
|
|
handle_pt_insn_event_flags (btinfo, decoder, insn, gaps);
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
bfun = ftrace_update_function (btinfo, insn.ip);
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
|
|
|
|
/* Maintain the function level offset. */
|
2017-05-30 18:47:37 +08:00
|
|
|
*plevel = std::min (*plevel, bfun->level);
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
|
2017-09-04 23:01:17 +08:00
|
|
|
ftrace_update_insns (bfun, pt_btrace_insn (insn));
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
}
|
|
|
|
|
2016-11-21 21:27:57 +08:00
|
|
|
if (status == -pte_eos)
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
break;
|
|
|
|
|
|
|
|
/* Indicate the gap in the trace. */
|
2016-11-21 21:27:57 +08:00
|
|
|
bfun = ftrace_new_gap (btinfo, status, gaps);
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
|
2016-01-12 17:44:37 +08:00
|
|
|
pt_insn_get_offset (decoder, &offset);
|
|
|
|
|
|
|
|
warning (_("Decode error (%d) at instruction %u (offset = 0x%" PRIx64
|
2016-11-21 21:27:57 +08:00
|
|
|
", pc = 0x%" PRIx64 "): %s."), status, bfun->insn_offset - 1,
|
|
|
|
offset, insn.ip, pt_errstr (pt_errcode (status)));
|
2016-01-12 17:44:37 +08:00
|
|
|
}
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* A callback function to allow the trace decoder to read the inferior's
|
|
|
|
memory. */
|
|
|
|
|
|
|
|
static int
|
|
|
|
btrace_pt_readmem_callback (gdb_byte *buffer, size_t size,
|
btrace: fix build fail with 32-bit BFD
When compiling GDB with 32-bit BFD, the build fails with:
In file included from btrace.h:33:0,
from btrace.c:23:
/usr/include/intel-pt.h:1643:51: note: expected 'int (*)(uint8_t *, size_t,
const struct pt_asid *, uint64_t, void *)' but argument is of type 'int
(*)(gdb_byte *, size_t, const struct pt_asid *, CORE_ADDR, void *)' extern
pt_export int pt_image_set_callback(struct pt_image *image, ^
gdb/
* btrace.c (btrace_pt_readmem_callback): Change type of PC argument.
2015-07-07 19:54:34 +08:00
|
|
|
const struct pt_asid *asid, uint64_t pc,
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
void *context)
|
|
|
|
{
|
2015-12-23 20:53:53 +08:00
|
|
|
int result, errcode;
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
|
2015-12-23 20:53:53 +08:00
|
|
|
result = (int) size;
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
TRY
|
|
|
|
{
|
btrace: fix build fail with 32-bit BFD
When compiling GDB with 32-bit BFD, the build fails with:
In file included from btrace.h:33:0,
from btrace.c:23:
/usr/include/intel-pt.h:1643:51: note: expected 'int (*)(uint8_t *, size_t,
const struct pt_asid *, uint64_t, void *)' but argument is of type 'int
(*)(gdb_byte *, size_t, const struct pt_asid *, CORE_ADDR, void *)' extern
pt_export int pt_image_set_callback(struct pt_image *image, ^
gdb/
* btrace.c (btrace_pt_readmem_callback): Change type of PC argument.
2015-07-07 19:54:34 +08:00
|
|
|
errcode = target_read_code ((CORE_ADDR) pc, buffer, size);
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
if (errcode != 0)
|
2015-12-23 20:53:53 +08:00
|
|
|
result = -pte_nomap;
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
}
|
|
|
|
CATCH (error, RETURN_MASK_ERROR)
|
|
|
|
{
|
2015-12-23 20:53:53 +08:00
|
|
|
result = -pte_nomap;
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
}
|
|
|
|
END_CATCH
|
|
|
|
|
2015-12-23 20:53:53 +08:00
|
|
|
return result;
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Translate the vendor from one enum to another. */
|
|
|
|
|
|
|
|
static enum pt_cpu_vendor
|
|
|
|
pt_translate_cpu_vendor (enum btrace_cpu_vendor vendor)
|
|
|
|
{
|
|
|
|
switch (vendor)
|
|
|
|
{
|
|
|
|
default:
|
|
|
|
return pcv_unknown;
|
|
|
|
|
|
|
|
case CV_INTEL:
|
|
|
|
return pcv_intel;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Finalize the function branch trace after decode. */
|
|
|
|
|
|
|
|
static void btrace_finalize_ftrace_pt (struct pt_insn_decoder *decoder,
|
|
|
|
struct thread_info *tp, int level)
|
|
|
|
{
|
|
|
|
pt_insn_free_decoder (decoder);
|
|
|
|
|
|
|
|
/* LEVEL is the minimal function level of all btrace function segments.
|
|
|
|
Define the global level offset to -LEVEL so all function levels are
|
|
|
|
normalized to start at zero. */
|
|
|
|
tp->btrace.level = -level;
|
|
|
|
|
|
|
|
/* Add a single last instruction entry for the current PC.
|
|
|
|
This allows us to compute the backtrace at the current PC using both
|
|
|
|
standard unwind and btrace unwind.
|
|
|
|
This extra entry is ignored by all record commands. */
|
|
|
|
btrace_add_pc (tp);
|
|
|
|
}
|
|
|
|
|
2016-01-12 23:03:11 +08:00
|
|
|
/* Compute the function branch trace from Intel Processor Trace
|
|
|
|
format. */
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
|
|
|
|
static void
|
|
|
|
btrace_compute_ftrace_pt (struct thread_info *tp,
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
const struct btrace_data_pt *btrace,
|
2017-05-30 18:47:37 +08:00
|
|
|
std::vector<unsigned int> &gaps)
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
{
|
|
|
|
struct btrace_thread_info *btinfo;
|
|
|
|
struct pt_insn_decoder *decoder;
|
|
|
|
struct pt_config config;
|
|
|
|
int level, errcode;
|
|
|
|
|
|
|
|
if (btrace->size == 0)
|
|
|
|
return;
|
|
|
|
|
|
|
|
btinfo = &tp->btrace;
|
2017-05-30 18:47:37 +08:00
|
|
|
if (btinfo->functions.empty ())
|
|
|
|
level = INT_MAX;
|
|
|
|
else
|
|
|
|
level = -btinfo->level;
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
|
|
|
|
pt_config_init(&config);
|
|
|
|
config.begin = btrace->data;
|
|
|
|
config.end = btrace->data + btrace->size;
|
|
|
|
|
|
|
|
config.cpu.vendor = pt_translate_cpu_vendor (btrace->config.cpu.vendor);
|
|
|
|
config.cpu.family = btrace->config.cpu.family;
|
|
|
|
config.cpu.model = btrace->config.cpu.model;
|
|
|
|
config.cpu.stepping = btrace->config.cpu.stepping;
|
|
|
|
|
|
|
|
errcode = pt_cpu_errata (&config.errata, &config.cpu);
|
|
|
|
if (errcode < 0)
|
2016-01-12 23:03:11 +08:00
|
|
|
error (_("Failed to configure the Intel Processor Trace decoder: %s."),
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
pt_errstr (pt_errcode (errcode)));
|
|
|
|
|
|
|
|
decoder = pt_insn_alloc_decoder (&config);
|
|
|
|
if (decoder == NULL)
|
2016-01-12 23:03:11 +08:00
|
|
|
error (_("Failed to allocate the Intel Processor Trace decoder."));
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
|
|
|
|
TRY
|
|
|
|
{
|
|
|
|
struct pt_image *image;
|
|
|
|
|
|
|
|
image = pt_insn_get_image(decoder);
|
|
|
|
if (image == NULL)
|
2016-01-12 23:03:11 +08:00
|
|
|
error (_("Failed to configure the Intel Processor Trace decoder."));
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
|
|
|
|
errcode = pt_image_set_callback(image, btrace_pt_readmem_callback, NULL);
|
|
|
|
if (errcode < 0)
|
2016-01-12 23:03:11 +08:00
|
|
|
error (_("Failed to configure the Intel Processor Trace decoder: "
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
"%s."), pt_errstr (pt_errcode (errcode)));
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_add_pt (btinfo, decoder, &level, gaps);
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
}
|
|
|
|
CATCH (error, RETURN_MASK_ALL)
|
|
|
|
{
|
|
|
|
/* Indicate a gap in the trace if we quit trace processing. */
|
2017-05-30 18:47:37 +08:00
|
|
|
if (error.reason == RETURN_QUIT && !btinfo->functions.empty ())
|
2017-05-30 18:47:37 +08:00
|
|
|
ftrace_new_gap (btinfo, BDE_PT_USER_QUIT, gaps);
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
|
|
|
|
btrace_finalize_ftrace_pt (decoder, tp, level);
|
|
|
|
|
|
|
|
throw_exception (error);
|
|
|
|
}
|
|
|
|
END_CATCH
|
|
|
|
|
|
|
|
btrace_finalize_ftrace_pt (decoder, tp, level);
|
|
|
|
}
|
|
|
|
|
|
|
|
#else /* defined (HAVE_LIBIPT) */
|
|
|
|
|
|
|
|
static void
|
|
|
|
btrace_compute_ftrace_pt (struct thread_info *tp,
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
const struct btrace_data_pt *btrace,
|
2017-05-30 18:47:37 +08:00
|
|
|
std::vector<unsigned int> &gaps)
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
{
|
|
|
|
internal_error (__FILE__, __LINE__, _("Unexpected branch trace format."));
|
|
|
|
}
|
|
|
|
|
|
|
|
#endif /* defined (HAVE_LIBIPT) */
|
|
|
|
|
2013-11-13 22:31:07 +08:00
|
|
|
/* Compute the function branch trace from a block branch trace BTRACE for
|
|
|
|
a thread given by BTINFO. */
|
|
|
|
|
|
|
|
static void
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
btrace_compute_ftrace_1 (struct thread_info *tp, struct btrace_data *btrace,
|
2017-05-30 18:47:37 +08:00
|
|
|
std::vector<unsigned int> &gaps)
|
2013-11-13 22:31:07 +08:00
|
|
|
{
|
|
|
|
DEBUG ("compute ftrace");
|
|
|
|
|
|
|
|
switch (btrace->format)
|
|
|
|
{
|
|
|
|
case BTRACE_FORMAT_NONE:
|
|
|
|
return;
|
|
|
|
|
|
|
|
case BTRACE_FORMAT_BTS:
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
btrace_compute_ftrace_bts (tp, &btrace->variant.bts, gaps);
|
2013-11-13 22:31:07 +08:00
|
|
|
return;
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
|
|
|
|
case BTRACE_FORMAT_PT:
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
btrace_compute_ftrace_pt (tp, &btrace->variant.pt, gaps);
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
return;
|
2013-11-13 22:31:07 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
internal_error (__FILE__, __LINE__, _("Unkown branch trace format."));
|
|
|
|
}
|
|
|
|
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
static void
|
2017-05-30 18:47:37 +08:00
|
|
|
btrace_finalize_ftrace (struct thread_info *tp, std::vector<unsigned int> &gaps)
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
if (!gaps.empty ())
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
tp->btrace.ngaps += gaps.size ();
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
btrace_bridge_gaps (tp, gaps);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
btrace_compute_ftrace (struct thread_info *tp, struct btrace_data *btrace)
|
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
std::vector<unsigned int> gaps;
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
|
|
|
|
TRY
|
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
btrace_compute_ftrace_1 (tp, btrace, gaps);
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
}
|
|
|
|
CATCH (error, RETURN_MASK_ALL)
|
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
btrace_finalize_ftrace (tp, gaps);
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
|
|
|
|
throw_exception (error);
|
|
|
|
}
|
|
|
|
END_CATCH
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
btrace_finalize_ftrace (tp, gaps);
|
btrace: bridge gaps
Most of the time, the trace should be in one piece. This case is handled fine
by GDB. In some cases, however, there may be gaps in the trace. They result
from trace decode errors or from overflows.
A gap in the trace means we lost an unknown amount of trace. Gaps can be very
small, such as a few instructions in the same function, or they can be rather
big. We may, for example, lose a few function calls or returns. The trace may
continue in a different function and we likely don't know how we got there.
Even though we can't say how the program executed across a gap, higher levels
may not be impacted too much by it. Let's assume we have functions a-e and a
trace that looks roughly like this:
a
\
b b
\ /
c <gap> c
/
d d
\ /
e
Even though we can't say for sure, it is likely that b and c are the same
function instance before and after the gap. This patch is trying to connect
the c and b function segments across the gap.
This will add a to the back trace of b on the right hand side. The changes are
reflected in GDB's internal representation of the trace and will improve:
- the output of "record function-call-history /c"
- the output of "backtrace" in replay mode
- source stepping in replay mode
will be improved indirectly via the improved back trace
I don't have an automated test for this patch; decode errors will be fixed and
overflows occur sporadically and are quite rare. I tested it by hacking GDB to
provoke a decode error and on the expected gap in the gdb.btrace/dlopen.exp
test.
The issue is that we can't predict where we will be able to re-sync in case of
errors. For the expected decode error in gdb.btrace/dlopen.exp, for example, we
may be able to re-sync somewhere in dlclose, in test, in main, or not at all.
Here's one example run of gdb.btrace/dlopen.exp with and without this patch.
(gdb) info record
Active record target: record-btrace
Recording format: Intel Processor Trace.
Buffer size: 16kB.
warning: Non-contiguous trace at instruction 66608 (offset = 0xa83, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66652 (offset = 0xa9b, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66770 (offset = 0xacb, pc = 0xb7fdcc31).
warning: Non-contiguous trace at instruction 66966 (offset = 0xb60, pc = 0xb7ff5ee4).
warning: Non-contiguous trace at instruction 66994 (offset = 0xb74, pc = 0xb7ff5f24).
warning: Non-contiguous trace at instruction 67334 (offset = 0xbac, pc = 0xb7ff5e6d).
warning: Non-contiguous trace at instruction 69022 (offset = 0xc04, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69116 (offset = 0xc1c, pc = 0xb7ff60b3).
warning: Non-contiguous trace at instruction 69504 (offset = 0xc74, pc = 0xb7ff605d).
warning: Non-contiguous trace at instruction 83648 (offset = 0xecc, pc = 0xb7ff6134).
warning: Decode error (-13) at instruction 83876 (offset = 0xf48, pc = 0xb7fd6380): no memory mapped at this address.
warning: Non-contiguous trace at instruction 83876 (offset = 0x11b7, pc = 0xb7ff1c70).
Recorded 83948 instructions in 912 functions (12 gaps) for thread 1 (process 12996).
(gdb) record instruction-history 83876, +2
83876 => 0xb7fec46f <call_init.part.0+95>: call *%eax
[decode error (-13): no memory mapped at this address]
[disabled]
83877 0xb7ff1c70 <_dl_close_worker.part.0+1584>: nop
Without the patch, the trace is disconnected and the backtrace is short:
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
Backtrace stopped: not enough registers or memory available to unwind further
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
With the patch, GDB is able to connect the trace pieces and we get a full
backtrace.
(gdb) record goto 83876
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7fec46f in call_init.part () from /lib/ld-linux.so.2
#1 0xb7fec5d0 in _dl_init () from /lib/ld-linux.so.2
#2 0xb7ff0fe3 in dl_open_worker () from /lib/ld-linux.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7ff02e2 in _dl_open () from /lib/ld-linux.so.2
#5 0xb7fc3c65 in dlopen_doit () from /lib/libdl.so.2
#6 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#7 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#8 0xb7fc3d0e in dlopen@@GLIBC_2.1 () from /lib/libdl.so.2
#9 0xb7ff28ee in _dl_runtime_resolve () from /lib/ld-linux.so.2
#10 0x0804841c in ?? ()
#11 0x08048470 in dlopen@plt ()
#12 0x080485a3 in test ()
#13 0x08048628 in main ()
(gdb) record goto 83877
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
(gdb) backtrace
#0 0xb7ff1c70 in _dl_close_worker.part.0 () from /lib/ld-linux.so.2
#1 0xb7ff287a in _dl_close () from /lib/ld-linux.so.2
#2 0xb7fc3d5d in dlclose_doit () from /lib/libdl.so.2
#3 0xb7fec354 in _dl_catch_error () from /lib/ld-linux.so.2
#4 0xb7fc43dd in _dlerror_run () from /lib/libdl.so.2
#5 0xb7fc3d98 in dlclose () from /lib/libdl.so.2
#6 0x0804860a in test ()
#7 0x08048628 in main ()
It worked nicely in this case but it may, of course, also lead to weird
connections; it is a heuristic, after all.
It works best when the gap is small and the trace pieces are long.
gdb/
* btrace.c (bfun_s): New typedef.
(ftrace_update_caller): Print caller in debug dump.
(ftrace_get_caller, ftrace_match_backtrace, ftrace_fixup_level)
(ftrace_compute_global_level_offset, ftrace_connect_bfun)
(ftrace_connect_backtrace, ftrace_bridge_gap, btrace_bridge_gaps): New.
(btrace_compute_ftrace_bts): Pass vector of gaps. Collect gaps.
(btrace_compute_ftrace_pt): Likewise.
(btrace_compute_ftrace): Split into this, ...
(btrace_compute_ftrace_1): ... this, and ...
(btrace_finalize_ftrace): ... this. Call btrace_bridge_gaps.
2016-01-21 22:02:27 +08:00
|
|
|
}
|
|
|
|
|
2013-09-10 18:27:14 +08:00
|
|
|
/* Add an entry for the current PC. */
|
|
|
|
|
|
|
|
static void
|
|
|
|
btrace_add_pc (struct thread_info *tp)
|
|
|
|
{
|
2013-11-13 22:31:07 +08:00
|
|
|
struct btrace_data btrace;
|
2013-09-10 18:27:14 +08:00
|
|
|
struct btrace_block *block;
|
|
|
|
struct regcache *regcache;
|
|
|
|
struct cleanup *cleanup;
|
|
|
|
CORE_ADDR pc;
|
|
|
|
|
|
|
|
regcache = get_thread_regcache (tp->ptid);
|
|
|
|
pc = regcache_read_pc (regcache);
|
|
|
|
|
2013-11-13 22:31:07 +08:00
|
|
|
btrace_data_init (&btrace);
|
|
|
|
btrace.format = BTRACE_FORMAT_BTS;
|
|
|
|
btrace.variant.bts.blocks = NULL;
|
2013-09-10 18:27:14 +08:00
|
|
|
|
2013-11-13 22:31:07 +08:00
|
|
|
cleanup = make_cleanup_btrace_data (&btrace);
|
|
|
|
|
|
|
|
block = VEC_safe_push (btrace_block_s, btrace.variant.bts.blocks, NULL);
|
2013-09-10 18:27:14 +08:00
|
|
|
block->begin = pc;
|
|
|
|
block->end = pc;
|
|
|
|
|
2014-01-29 18:12:06 +08:00
|
|
|
btrace_compute_ftrace (tp, &btrace);
|
2013-09-10 18:27:14 +08:00
|
|
|
|
|
|
|
do_cleanups (cleanup);
|
|
|
|
}
|
|
|
|
|
2013-03-11 16:17:08 +08:00
|
|
|
/* See btrace.h. */
|
|
|
|
|
|
|
|
void
|
2013-11-28 22:44:13 +08:00
|
|
|
btrace_enable (struct thread_info *tp, const struct btrace_config *conf)
|
2013-03-11 16:17:08 +08:00
|
|
|
{
|
|
|
|
if (tp->btrace.target != NULL)
|
|
|
|
return;
|
|
|
|
|
2015-11-19 21:33:41 +08:00
|
|
|
#if !defined (HAVE_LIBIPT)
|
|
|
|
if (conf->format == BTRACE_FORMAT_PT)
|
2016-01-12 23:03:11 +08:00
|
|
|
error (_("GDB does not support Intel Processor Trace."));
|
2015-11-19 21:33:41 +08:00
|
|
|
#endif /* !defined (HAVE_LIBIPT) */
|
|
|
|
|
2013-11-28 22:44:13 +08:00
|
|
|
if (!target_supports_btrace (conf->format))
|
2013-03-11 16:17:08 +08:00
|
|
|
error (_("Target does not support branch tracing."));
|
|
|
|
|
Centralize thread ID printing
Add a new function to print a thread ID, in the style of paddress,
plongest, etc. and adjust all CLI-reachable paths to use it.
This gives us a single place to tweak to print inferior-qualified
thread IDs later:
- [Switching to thread 1 (Thread 0x7ffff7fc2740 (LWP 8155))]
+ [Switching to thread 1.1 (Thread 0x7ffff7fc2740 (LWP 8155))]
etc., though for now, this has no user-visible change.
No regressions on x86_64 Fedora 20.
gdb/ChangeLog:
2016-01-13 Pedro Alves <palves@redhat.com>
* breakpoint.c (remove_threaded_breakpoints)
(print_one_breakpoint_location): Use print_thread_id.
* btrace.c (btrace_enable, btrace_disable, btrace_teardown)
(btrace_fetch, btrace_clear): Use print_thread_id.
* common/print-utils.c (CELLSIZE): Delete.
(get_cell): Rename to ...
(get_print_cell): ... this and made extern. Adjust call callers.
Adjust to use PRINT_CELL_SIZE.
* common/print-utils.h (get_print_cell): Declare.
(PRINT_CELL_SIZE): New.
* gdbthread.h (print_thread_id): Declare.
* infcmd.c (signal_command): Use print_thread_id.
* inferior.c (print_inferior): Use print_thread_id.
* infrun.c (handle_signal_stop)
(insert_exception_resume_breakpoint)
(insert_exception_resume_from_probe)
(print_signal_received_reason): Use print_thread_id.
* record-btrace.c (record_btrace_info)
(record_btrace_resume_thread, record_btrace_cancel_resume)
(record_btrace_step_thread, record_btrace_wait): Use
print_thread_id.
* thread.c (thread_apply_all_command): Use print_thread_id.
(print_thread_id): New function.
(thread_apply_command): Use print_thread_id.
(thread_command, thread_find_command, do_captured_thread_select):
Use print_thread_id.
2016-01-13 18:56:06 +08:00
|
|
|
DEBUG ("enable thread %s (%s)", print_thread_id (tp),
|
|
|
|
target_pid_to_str (tp->ptid));
|
2013-03-11 16:17:08 +08:00
|
|
|
|
2013-11-28 22:44:13 +08:00
|
|
|
tp->btrace.target = target_enable_btrace (tp->ptid, conf);
|
2013-09-10 18:27:14 +08:00
|
|
|
|
2016-11-30 18:05:38 +08:00
|
|
|
/* We're done if we failed to enable tracing. */
|
|
|
|
if (tp->btrace.target == NULL)
|
|
|
|
return;
|
|
|
|
|
|
|
|
/* We need to undo the enable in case of errors. */
|
|
|
|
TRY
|
|
|
|
{
|
|
|
|
/* Add an entry for the current PC so we start tracing from where we
|
|
|
|
enabled it.
|
|
|
|
|
|
|
|
If we can't access TP's registers, TP is most likely running. In this
|
|
|
|
case, we can't really say where tracing was enabled so it should be
|
|
|
|
safe to simply skip this step.
|
|
|
|
|
|
|
|
This is not relevant for BTRACE_FORMAT_PT since the trace will already
|
|
|
|
start at the PC at which tracing was enabled. */
|
|
|
|
if (conf->format != BTRACE_FORMAT_PT
|
|
|
|
&& can_access_registers_ptid (tp->ptid))
|
|
|
|
btrace_add_pc (tp);
|
|
|
|
}
|
|
|
|
CATCH (exception, RETURN_MASK_ALL)
|
|
|
|
{
|
|
|
|
btrace_disable (tp);
|
|
|
|
|
|
|
|
throw_exception (exception);
|
|
|
|
}
|
|
|
|
END_CATCH
|
2013-03-11 16:17:08 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* See btrace.h. */
|
|
|
|
|
2013-11-28 22:44:13 +08:00
|
|
|
const struct btrace_config *
|
|
|
|
btrace_conf (const struct btrace_thread_info *btinfo)
|
|
|
|
{
|
|
|
|
if (btinfo->target == NULL)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
return target_btrace_conf (btinfo->target);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* See btrace.h. */
|
|
|
|
|
2013-03-11 16:17:08 +08:00
|
|
|
void
|
|
|
|
btrace_disable (struct thread_info *tp)
|
|
|
|
{
|
|
|
|
struct btrace_thread_info *btp = &tp->btrace;
|
|
|
|
int errcode = 0;
|
|
|
|
|
|
|
|
if (btp->target == NULL)
|
|
|
|
return;
|
|
|
|
|
Centralize thread ID printing
Add a new function to print a thread ID, in the style of paddress,
plongest, etc. and adjust all CLI-reachable paths to use it.
This gives us a single place to tweak to print inferior-qualified
thread IDs later:
- [Switching to thread 1 (Thread 0x7ffff7fc2740 (LWP 8155))]
+ [Switching to thread 1.1 (Thread 0x7ffff7fc2740 (LWP 8155))]
etc., though for now, this has no user-visible change.
No regressions on x86_64 Fedora 20.
gdb/ChangeLog:
2016-01-13 Pedro Alves <palves@redhat.com>
* breakpoint.c (remove_threaded_breakpoints)
(print_one_breakpoint_location): Use print_thread_id.
* btrace.c (btrace_enable, btrace_disable, btrace_teardown)
(btrace_fetch, btrace_clear): Use print_thread_id.
* common/print-utils.c (CELLSIZE): Delete.
(get_cell): Rename to ...
(get_print_cell): ... this and made extern. Adjust call callers.
Adjust to use PRINT_CELL_SIZE.
* common/print-utils.h (get_print_cell): Declare.
(PRINT_CELL_SIZE): New.
* gdbthread.h (print_thread_id): Declare.
* infcmd.c (signal_command): Use print_thread_id.
* inferior.c (print_inferior): Use print_thread_id.
* infrun.c (handle_signal_stop)
(insert_exception_resume_breakpoint)
(insert_exception_resume_from_probe)
(print_signal_received_reason): Use print_thread_id.
* record-btrace.c (record_btrace_info)
(record_btrace_resume_thread, record_btrace_cancel_resume)
(record_btrace_step_thread, record_btrace_wait): Use
print_thread_id.
* thread.c (thread_apply_all_command): Use print_thread_id.
(print_thread_id): New function.
(thread_apply_command): Use print_thread_id.
(thread_command, thread_find_command, do_captured_thread_select):
Use print_thread_id.
2016-01-13 18:56:06 +08:00
|
|
|
DEBUG ("disable thread %s (%s)", print_thread_id (tp),
|
|
|
|
target_pid_to_str (tp->ptid));
|
2013-03-11 16:17:08 +08:00
|
|
|
|
|
|
|
target_disable_btrace (btp->target);
|
|
|
|
btp->target = NULL;
|
|
|
|
|
|
|
|
btrace_clear (tp);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* See btrace.h. */
|
|
|
|
|
|
|
|
void
|
|
|
|
btrace_teardown (struct thread_info *tp)
|
|
|
|
{
|
|
|
|
struct btrace_thread_info *btp = &tp->btrace;
|
|
|
|
int errcode = 0;
|
|
|
|
|
|
|
|
if (btp->target == NULL)
|
|
|
|
return;
|
|
|
|
|
Centralize thread ID printing
Add a new function to print a thread ID, in the style of paddress,
plongest, etc. and adjust all CLI-reachable paths to use it.
This gives us a single place to tweak to print inferior-qualified
thread IDs later:
- [Switching to thread 1 (Thread 0x7ffff7fc2740 (LWP 8155))]
+ [Switching to thread 1.1 (Thread 0x7ffff7fc2740 (LWP 8155))]
etc., though for now, this has no user-visible change.
No regressions on x86_64 Fedora 20.
gdb/ChangeLog:
2016-01-13 Pedro Alves <palves@redhat.com>
* breakpoint.c (remove_threaded_breakpoints)
(print_one_breakpoint_location): Use print_thread_id.
* btrace.c (btrace_enable, btrace_disable, btrace_teardown)
(btrace_fetch, btrace_clear): Use print_thread_id.
* common/print-utils.c (CELLSIZE): Delete.
(get_cell): Rename to ...
(get_print_cell): ... this and made extern. Adjust call callers.
Adjust to use PRINT_CELL_SIZE.
* common/print-utils.h (get_print_cell): Declare.
(PRINT_CELL_SIZE): New.
* gdbthread.h (print_thread_id): Declare.
* infcmd.c (signal_command): Use print_thread_id.
* inferior.c (print_inferior): Use print_thread_id.
* infrun.c (handle_signal_stop)
(insert_exception_resume_breakpoint)
(insert_exception_resume_from_probe)
(print_signal_received_reason): Use print_thread_id.
* record-btrace.c (record_btrace_info)
(record_btrace_resume_thread, record_btrace_cancel_resume)
(record_btrace_step_thread, record_btrace_wait): Use
print_thread_id.
* thread.c (thread_apply_all_command): Use print_thread_id.
(print_thread_id): New function.
(thread_apply_command): Use print_thread_id.
(thread_command, thread_find_command, do_captured_thread_select):
Use print_thread_id.
2016-01-13 18:56:06 +08:00
|
|
|
DEBUG ("teardown thread %s (%s)", print_thread_id (tp),
|
|
|
|
target_pid_to_str (tp->ptid));
|
2013-03-11 16:17:08 +08:00
|
|
|
|
|
|
|
target_teardown_btrace (btp->target);
|
|
|
|
btp->target = NULL;
|
|
|
|
|
|
|
|
btrace_clear (tp);
|
|
|
|
}
|
|
|
|
|
2013-11-13 22:31:07 +08:00
|
|
|
/* Stitch branch trace in BTS format. */
|
2013-06-03 21:39:35 +08:00
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static int
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record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
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btrace_stitch_bts (struct btrace_data_bts *btrace, struct thread_info *tp)
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2013-06-03 21:39:35 +08:00
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{
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record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
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struct btrace_thread_info *btinfo;
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2013-06-03 21:39:35 +08:00
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struct btrace_function *last_bfun;
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btrace_block_s *first_new_block;
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record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
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btinfo = &tp->btrace;
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2017-05-30 18:47:37 +08:00
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gdb_assert (!btinfo->functions.empty ());
|
record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
|
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|
gdb_assert (!VEC_empty (btrace_block_s, btrace->blocks));
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2017-05-30 18:47:37 +08:00
|
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last_bfun = &btinfo->functions.back ();
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2017-05-30 18:47:37 +08:00
|
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record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
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/* If the existing trace ends with a gap, we just glue the traces
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together. We need to drop the last (i.e. chronologically first) block
|
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of the new trace, though, since we can't fill in the start address.*/
|
btrace: Store btrace_insn in an std::vector
Because it contains a non-POD type field (flags), the type btrace_insn
should be new'ed/delete'd. Replace the VEC (btrace_insn_s) in
btrace_function with an std::vector.
gdb/ChangeLog:
* btrace.h (btrace_insn_s, DEF_VEC_O (btrace_insn_s)): Remove.
(btrace_function) <insn>: Change type to use std::vector.
* btrace.c (ftrace_debug, ftrace_call_num_insn,
ftrace_find_call, ftrace_new_gap, ftrace_update_function,
ftrace_update_insns, ftrace_compute_global_level_offset,
btrace_stitch_bts, btrace_clear, btrace_insn_get,
btrace_insn_end, btrace_insn_next, btrace_insn_prev): Adjust to
change to std::vector.
(ftrace_update_insns): Adjust to change to std::vector, change
type of INSN parameter.
(btrace_compute_ftrace_bts): Adjust call to ftrace_update_insns.
* record-btrace.c (btrace_call_history_insn_range,
btrace_compute_src_line_range,
record_btrace_frame_prev_register): Adjust to change to
std::vector.
* python/py-record-btrace.c (recpy_bt_func_instructions): Adjust
to change to std::vector.
2017-09-04 16:46:36 +08:00
|
|
|
if (last_bfun->insn.empty ())
|
record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
|
|
|
{
|
|
|
|
VEC_pop (btrace_block_s, btrace->blocks);
|
|
|
|
return 0;
|
|
|
|
}
|
2013-06-03 21:39:35 +08:00
|
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|
/* Beware that block trace starts with the most recent block, so the
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|
chronologically first block in the new trace is the last block in
|
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|
the new trace's block vector. */
|
2013-11-13 22:31:07 +08:00
|
|
|
first_new_block = VEC_last (btrace_block_s, btrace->blocks);
|
btrace: Store btrace_insn in an std::vector
Because it contains a non-POD type field (flags), the type btrace_insn
should be new'ed/delete'd. Replace the VEC (btrace_insn_s) in
btrace_function with an std::vector.
gdb/ChangeLog:
* btrace.h (btrace_insn_s, DEF_VEC_O (btrace_insn_s)): Remove.
(btrace_function) <insn>: Change type to use std::vector.
* btrace.c (ftrace_debug, ftrace_call_num_insn,
ftrace_find_call, ftrace_new_gap, ftrace_update_function,
ftrace_update_insns, ftrace_compute_global_level_offset,
btrace_stitch_bts, btrace_clear, btrace_insn_get,
btrace_insn_end, btrace_insn_next, btrace_insn_prev): Adjust to
change to std::vector.
(ftrace_update_insns): Adjust to change to std::vector, change
type of INSN parameter.
(btrace_compute_ftrace_bts): Adjust call to ftrace_update_insns.
* record-btrace.c (btrace_call_history_insn_range,
btrace_compute_src_line_range,
record_btrace_frame_prev_register): Adjust to change to
std::vector.
* python/py-record-btrace.c (recpy_bt_func_instructions): Adjust
to change to std::vector.
2017-09-04 16:46:36 +08:00
|
|
|
const btrace_insn &last_insn = last_bfun->insn.back ();
|
2013-06-03 21:39:35 +08:00
|
|
|
|
|
|
|
/* If the current PC at the end of the block is the same as in our current
|
|
|
|
trace, there are two explanations:
|
|
|
|
1. we executed the instruction and some branch brought us back.
|
|
|
|
2. we have not made any progress.
|
|
|
|
In the first case, the delta trace vector should contain at least two
|
|
|
|
entries.
|
|
|
|
In the second case, the delta trace vector should contain exactly one
|
|
|
|
entry for the partial block containing the current PC. Remove it. */
|
btrace: Store btrace_insn in an std::vector
Because it contains a non-POD type field (flags), the type btrace_insn
should be new'ed/delete'd. Replace the VEC (btrace_insn_s) in
btrace_function with an std::vector.
gdb/ChangeLog:
* btrace.h (btrace_insn_s, DEF_VEC_O (btrace_insn_s)): Remove.
(btrace_function) <insn>: Change type to use std::vector.
* btrace.c (ftrace_debug, ftrace_call_num_insn,
ftrace_find_call, ftrace_new_gap, ftrace_update_function,
ftrace_update_insns, ftrace_compute_global_level_offset,
btrace_stitch_bts, btrace_clear, btrace_insn_get,
btrace_insn_end, btrace_insn_next, btrace_insn_prev): Adjust to
change to std::vector.
(ftrace_update_insns): Adjust to change to std::vector, change
type of INSN parameter.
(btrace_compute_ftrace_bts): Adjust call to ftrace_update_insns.
* record-btrace.c (btrace_call_history_insn_range,
btrace_compute_src_line_range,
record_btrace_frame_prev_register): Adjust to change to
std::vector.
* python/py-record-btrace.c (recpy_bt_func_instructions): Adjust
to change to std::vector.
2017-09-04 16:46:36 +08:00
|
|
|
if (first_new_block->end == last_insn.pc
|
2013-11-13 22:31:07 +08:00
|
|
|
&& VEC_length (btrace_block_s, btrace->blocks) == 1)
|
2013-06-03 21:39:35 +08:00
|
|
|
{
|
2013-11-13 22:31:07 +08:00
|
|
|
VEC_pop (btrace_block_s, btrace->blocks);
|
2013-06-03 21:39:35 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
btrace: Store btrace_insn in an std::vector
Because it contains a non-POD type field (flags), the type btrace_insn
should be new'ed/delete'd. Replace the VEC (btrace_insn_s) in
btrace_function with an std::vector.
gdb/ChangeLog:
* btrace.h (btrace_insn_s, DEF_VEC_O (btrace_insn_s)): Remove.
(btrace_function) <insn>: Change type to use std::vector.
* btrace.c (ftrace_debug, ftrace_call_num_insn,
ftrace_find_call, ftrace_new_gap, ftrace_update_function,
ftrace_update_insns, ftrace_compute_global_level_offset,
btrace_stitch_bts, btrace_clear, btrace_insn_get,
btrace_insn_end, btrace_insn_next, btrace_insn_prev): Adjust to
change to std::vector.
(ftrace_update_insns): Adjust to change to std::vector, change
type of INSN parameter.
(btrace_compute_ftrace_bts): Adjust call to ftrace_update_insns.
* record-btrace.c (btrace_call_history_insn_range,
btrace_compute_src_line_range,
record_btrace_frame_prev_register): Adjust to change to
std::vector.
* python/py-record-btrace.c (recpy_bt_func_instructions): Adjust
to change to std::vector.
2017-09-04 16:46:36 +08:00
|
|
|
DEBUG ("stitching %s to %s", ftrace_print_insn_addr (&last_insn),
|
2013-06-03 21:39:35 +08:00
|
|
|
core_addr_to_string_nz (first_new_block->end));
|
|
|
|
|
|
|
|
/* Do a simple sanity check to make sure we don't accidentally end up
|
|
|
|
with a bad block. This should not occur in practice. */
|
btrace: Store btrace_insn in an std::vector
Because it contains a non-POD type field (flags), the type btrace_insn
should be new'ed/delete'd. Replace the VEC (btrace_insn_s) in
btrace_function with an std::vector.
gdb/ChangeLog:
* btrace.h (btrace_insn_s, DEF_VEC_O (btrace_insn_s)): Remove.
(btrace_function) <insn>: Change type to use std::vector.
* btrace.c (ftrace_debug, ftrace_call_num_insn,
ftrace_find_call, ftrace_new_gap, ftrace_update_function,
ftrace_update_insns, ftrace_compute_global_level_offset,
btrace_stitch_bts, btrace_clear, btrace_insn_get,
btrace_insn_end, btrace_insn_next, btrace_insn_prev): Adjust to
change to std::vector.
(ftrace_update_insns): Adjust to change to std::vector, change
type of INSN parameter.
(btrace_compute_ftrace_bts): Adjust call to ftrace_update_insns.
* record-btrace.c (btrace_call_history_insn_range,
btrace_compute_src_line_range,
record_btrace_frame_prev_register): Adjust to change to
std::vector.
* python/py-record-btrace.c (recpy_bt_func_instructions): Adjust
to change to std::vector.
2017-09-04 16:46:36 +08:00
|
|
|
if (first_new_block->end < last_insn.pc)
|
2013-06-03 21:39:35 +08:00
|
|
|
{
|
|
|
|
warning (_("Error while trying to read delta trace. Falling back to "
|
|
|
|
"a full read."));
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* We adjust the last block to start at the end of our current trace. */
|
|
|
|
gdb_assert (first_new_block->begin == 0);
|
btrace: Store btrace_insn in an std::vector
Because it contains a non-POD type field (flags), the type btrace_insn
should be new'ed/delete'd. Replace the VEC (btrace_insn_s) in
btrace_function with an std::vector.
gdb/ChangeLog:
* btrace.h (btrace_insn_s, DEF_VEC_O (btrace_insn_s)): Remove.
(btrace_function) <insn>: Change type to use std::vector.
* btrace.c (ftrace_debug, ftrace_call_num_insn,
ftrace_find_call, ftrace_new_gap, ftrace_update_function,
ftrace_update_insns, ftrace_compute_global_level_offset,
btrace_stitch_bts, btrace_clear, btrace_insn_get,
btrace_insn_end, btrace_insn_next, btrace_insn_prev): Adjust to
change to std::vector.
(ftrace_update_insns): Adjust to change to std::vector, change
type of INSN parameter.
(btrace_compute_ftrace_bts): Adjust call to ftrace_update_insns.
* record-btrace.c (btrace_call_history_insn_range,
btrace_compute_src_line_range,
record_btrace_frame_prev_register): Adjust to change to
std::vector.
* python/py-record-btrace.c (recpy_bt_func_instructions): Adjust
to change to std::vector.
2017-09-04 16:46:36 +08:00
|
|
|
first_new_block->begin = last_insn.pc;
|
2013-06-03 21:39:35 +08:00
|
|
|
|
|
|
|
/* We simply pop the last insn so we can insert it again as part of
|
|
|
|
the normal branch trace computation.
|
|
|
|
Since instruction iterators are based on indices in the instructions
|
|
|
|
vector, we don't leave any pointers dangling. */
|
|
|
|
DEBUG ("pruning insn at %s for stitching",
|
btrace: Store btrace_insn in an std::vector
Because it contains a non-POD type field (flags), the type btrace_insn
should be new'ed/delete'd. Replace the VEC (btrace_insn_s) in
btrace_function with an std::vector.
gdb/ChangeLog:
* btrace.h (btrace_insn_s, DEF_VEC_O (btrace_insn_s)): Remove.
(btrace_function) <insn>: Change type to use std::vector.
* btrace.c (ftrace_debug, ftrace_call_num_insn,
ftrace_find_call, ftrace_new_gap, ftrace_update_function,
ftrace_update_insns, ftrace_compute_global_level_offset,
btrace_stitch_bts, btrace_clear, btrace_insn_get,
btrace_insn_end, btrace_insn_next, btrace_insn_prev): Adjust to
change to std::vector.
(ftrace_update_insns): Adjust to change to std::vector, change
type of INSN parameter.
(btrace_compute_ftrace_bts): Adjust call to ftrace_update_insns.
* record-btrace.c (btrace_call_history_insn_range,
btrace_compute_src_line_range,
record_btrace_frame_prev_register): Adjust to change to
std::vector.
* python/py-record-btrace.c (recpy_bt_func_instructions): Adjust
to change to std::vector.
2017-09-04 16:46:36 +08:00
|
|
|
ftrace_print_insn_addr (&last_insn));
|
2013-06-03 21:39:35 +08:00
|
|
|
|
btrace: Store btrace_insn in an std::vector
Because it contains a non-POD type field (flags), the type btrace_insn
should be new'ed/delete'd. Replace the VEC (btrace_insn_s) in
btrace_function with an std::vector.
gdb/ChangeLog:
* btrace.h (btrace_insn_s, DEF_VEC_O (btrace_insn_s)): Remove.
(btrace_function) <insn>: Change type to use std::vector.
* btrace.c (ftrace_debug, ftrace_call_num_insn,
ftrace_find_call, ftrace_new_gap, ftrace_update_function,
ftrace_update_insns, ftrace_compute_global_level_offset,
btrace_stitch_bts, btrace_clear, btrace_insn_get,
btrace_insn_end, btrace_insn_next, btrace_insn_prev): Adjust to
change to std::vector.
(ftrace_update_insns): Adjust to change to std::vector, change
type of INSN parameter.
(btrace_compute_ftrace_bts): Adjust call to ftrace_update_insns.
* record-btrace.c (btrace_call_history_insn_range,
btrace_compute_src_line_range,
record_btrace_frame_prev_register): Adjust to change to
std::vector.
* python/py-record-btrace.c (recpy_bt_func_instructions): Adjust
to change to std::vector.
2017-09-04 16:46:36 +08:00
|
|
|
last_bfun->insn.pop_back ();
|
2013-06-03 21:39:35 +08:00
|
|
|
|
|
|
|
/* The instructions vector may become empty temporarily if this has
|
|
|
|
been the only instruction in this function segment.
|
|
|
|
This violates the invariant but will be remedied shortly by
|
|
|
|
btrace_compute_ftrace when we add the new trace. */
|
record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
|
|
|
|
|
|
|
/* The only case where this would hurt is if the entire trace consisted
|
|
|
|
of just that one instruction. If we remove it, we might turn the now
|
|
|
|
empty btrace function segment into a gap. But we don't want gaps at
|
|
|
|
the beginning. To avoid this, we remove the entire old trace. */
|
btrace: Store btrace_insn in an std::vector
Because it contains a non-POD type field (flags), the type btrace_insn
should be new'ed/delete'd. Replace the VEC (btrace_insn_s) in
btrace_function with an std::vector.
gdb/ChangeLog:
* btrace.h (btrace_insn_s, DEF_VEC_O (btrace_insn_s)): Remove.
(btrace_function) <insn>: Change type to use std::vector.
* btrace.c (ftrace_debug, ftrace_call_num_insn,
ftrace_find_call, ftrace_new_gap, ftrace_update_function,
ftrace_update_insns, ftrace_compute_global_level_offset,
btrace_stitch_bts, btrace_clear, btrace_insn_get,
btrace_insn_end, btrace_insn_next, btrace_insn_prev): Adjust to
change to std::vector.
(ftrace_update_insns): Adjust to change to std::vector, change
type of INSN parameter.
(btrace_compute_ftrace_bts): Adjust call to ftrace_update_insns.
* record-btrace.c (btrace_call_history_insn_range,
btrace_compute_src_line_range,
record_btrace_frame_prev_register): Adjust to change to
std::vector.
* python/py-record-btrace.c (recpy_bt_func_instructions): Adjust
to change to std::vector.
2017-09-04 16:46:36 +08:00
|
|
|
if (last_bfun->number == 1 && last_bfun->insn.empty ())
|
record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
|
|
|
btrace_clear (tp);
|
|
|
|
|
2013-06-03 21:39:35 +08:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2013-11-13 22:31:07 +08:00
|
|
|
/* Adjust the block trace in order to stitch old and new trace together.
|
|
|
|
BTRACE is the new delta trace between the last and the current stop.
|
record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
|
|
|
TP is the traced thread.
|
|
|
|
May modifx BTRACE as well as the existing trace in TP.
|
2013-11-13 22:31:07 +08:00
|
|
|
Return 0 on success, -1 otherwise. */
|
|
|
|
|
|
|
|
static int
|
record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
|
|
|
btrace_stitch_trace (struct btrace_data *btrace, struct thread_info *tp)
|
2013-11-13 22:31:07 +08:00
|
|
|
{
|
|
|
|
/* If we don't have trace, there's nothing to do. */
|
|
|
|
if (btrace_data_empty (btrace))
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
switch (btrace->format)
|
|
|
|
{
|
|
|
|
case BTRACE_FORMAT_NONE:
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
case BTRACE_FORMAT_BTS:
|
record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
|
|
|
return btrace_stitch_bts (&btrace->variant.bts, tp);
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
|
|
|
|
case BTRACE_FORMAT_PT:
|
|
|
|
/* Delta reads are not supported. */
|
|
|
|
return -1;
|
2013-11-13 22:31:07 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
internal_error (__FILE__, __LINE__, _("Unkown branch trace format."));
|
|
|
|
}
|
|
|
|
|
2013-06-03 21:39:35 +08:00
|
|
|
/* Clear the branch trace histories in BTINFO. */
|
|
|
|
|
|
|
|
static void
|
|
|
|
btrace_clear_history (struct btrace_thread_info *btinfo)
|
|
|
|
{
|
|
|
|
xfree (btinfo->insn_history);
|
|
|
|
xfree (btinfo->call_history);
|
|
|
|
xfree (btinfo->replay);
|
|
|
|
|
|
|
|
btinfo->insn_history = NULL;
|
|
|
|
btinfo->call_history = NULL;
|
|
|
|
btinfo->replay = NULL;
|
|
|
|
}
|
|
|
|
|
btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
|
|
|
/* Clear the branch trace maintenance histories in BTINFO. */
|
|
|
|
|
|
|
|
static void
|
|
|
|
btrace_maint_clear (struct btrace_thread_info *btinfo)
|
|
|
|
{
|
|
|
|
switch (btinfo->data.format)
|
|
|
|
{
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
|
|
|
|
case BTRACE_FORMAT_BTS:
|
|
|
|
btinfo->maint.variant.bts.packet_history.begin = 0;
|
|
|
|
btinfo->maint.variant.bts.packet_history.end = 0;
|
|
|
|
break;
|
|
|
|
|
|
|
|
#if defined (HAVE_LIBIPT)
|
|
|
|
case BTRACE_FORMAT_PT:
|
|
|
|
xfree (btinfo->maint.variant.pt.packets);
|
|
|
|
|
|
|
|
btinfo->maint.variant.pt.packets = NULL;
|
|
|
|
btinfo->maint.variant.pt.packet_history.begin = 0;
|
|
|
|
btinfo->maint.variant.pt.packet_history.end = 0;
|
|
|
|
break;
|
|
|
|
#endif /* defined (HAVE_LIBIPT) */
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2013-03-11 16:17:08 +08:00
|
|
|
/* See btrace.h. */
|
|
|
|
|
2016-11-21 23:39:57 +08:00
|
|
|
const char *
|
|
|
|
btrace_decode_error (enum btrace_format format, int errcode)
|
|
|
|
{
|
|
|
|
switch (format)
|
|
|
|
{
|
|
|
|
case BTRACE_FORMAT_BTS:
|
|
|
|
switch (errcode)
|
|
|
|
{
|
|
|
|
case BDE_BTS_OVERFLOW:
|
|
|
|
return _("instruction overflow");
|
|
|
|
|
|
|
|
case BDE_BTS_INSN_SIZE:
|
|
|
|
return _("unknown instruction");
|
|
|
|
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
|
|
|
#if defined (HAVE_LIBIPT)
|
|
|
|
case BTRACE_FORMAT_PT:
|
|
|
|
switch (errcode)
|
|
|
|
{
|
|
|
|
case BDE_PT_USER_QUIT:
|
|
|
|
return _("trace decode cancelled");
|
|
|
|
|
|
|
|
case BDE_PT_DISABLED:
|
|
|
|
return _("disabled");
|
|
|
|
|
|
|
|
case BDE_PT_OVERFLOW:
|
|
|
|
return _("overflow");
|
|
|
|
|
|
|
|
default:
|
|
|
|
if (errcode < 0)
|
|
|
|
return pt_errstr (pt_errcode (errcode));
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
#endif /* defined (HAVE_LIBIPT) */
|
|
|
|
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
return _("unknown");
|
|
|
|
}
|
|
|
|
|
|
|
|
/* See btrace.h. */
|
|
|
|
|
2013-03-11 16:17:08 +08:00
|
|
|
void
|
|
|
|
btrace_fetch (struct thread_info *tp)
|
|
|
|
{
|
|
|
|
struct btrace_thread_info *btinfo;
|
2013-06-03 21:39:35 +08:00
|
|
|
struct btrace_target_info *tinfo;
|
2013-11-13 22:31:07 +08:00
|
|
|
struct btrace_data btrace;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
struct cleanup *cleanup;
|
2013-06-03 21:39:35 +08:00
|
|
|
int errcode;
|
2013-03-11 16:17:08 +08:00
|
|
|
|
Centralize thread ID printing
Add a new function to print a thread ID, in the style of paddress,
plongest, etc. and adjust all CLI-reachable paths to use it.
This gives us a single place to tweak to print inferior-qualified
thread IDs later:
- [Switching to thread 1 (Thread 0x7ffff7fc2740 (LWP 8155))]
+ [Switching to thread 1.1 (Thread 0x7ffff7fc2740 (LWP 8155))]
etc., though for now, this has no user-visible change.
No regressions on x86_64 Fedora 20.
gdb/ChangeLog:
2016-01-13 Pedro Alves <palves@redhat.com>
* breakpoint.c (remove_threaded_breakpoints)
(print_one_breakpoint_location): Use print_thread_id.
* btrace.c (btrace_enable, btrace_disable, btrace_teardown)
(btrace_fetch, btrace_clear): Use print_thread_id.
* common/print-utils.c (CELLSIZE): Delete.
(get_cell): Rename to ...
(get_print_cell): ... this and made extern. Adjust call callers.
Adjust to use PRINT_CELL_SIZE.
* common/print-utils.h (get_print_cell): Declare.
(PRINT_CELL_SIZE): New.
* gdbthread.h (print_thread_id): Declare.
* infcmd.c (signal_command): Use print_thread_id.
* inferior.c (print_inferior): Use print_thread_id.
* infrun.c (handle_signal_stop)
(insert_exception_resume_breakpoint)
(insert_exception_resume_from_probe)
(print_signal_received_reason): Use print_thread_id.
* record-btrace.c (record_btrace_info)
(record_btrace_resume_thread, record_btrace_cancel_resume)
(record_btrace_step_thread, record_btrace_wait): Use
print_thread_id.
* thread.c (thread_apply_all_command): Use print_thread_id.
(print_thread_id): New function.
(thread_apply_command): Use print_thread_id.
(thread_command, thread_find_command, do_captured_thread_select):
Use print_thread_id.
2016-01-13 18:56:06 +08:00
|
|
|
DEBUG ("fetch thread %s (%s)", print_thread_id (tp),
|
|
|
|
target_pid_to_str (tp->ptid));
|
2013-03-11 16:17:08 +08:00
|
|
|
|
|
|
|
btinfo = &tp->btrace;
|
2013-06-03 21:39:35 +08:00
|
|
|
tinfo = btinfo->target;
|
|
|
|
if (tinfo == NULL)
|
|
|
|
return;
|
|
|
|
|
|
|
|
/* There's no way we could get new trace while replaying.
|
|
|
|
On the other hand, delta trace would return a partial record with the
|
|
|
|
current PC, which is the replay PC, not the last PC, as expected. */
|
|
|
|
if (btinfo->replay != NULL)
|
2013-03-11 16:17:08 +08:00
|
|
|
return;
|
|
|
|
|
2017-05-02 17:35:54 +08:00
|
|
|
/* With CLI usage, TP->PTID always equals INFERIOR_PTID here. Now that we
|
|
|
|
can store a gdb.Record object in Python referring to a different thread
|
|
|
|
than the current one, temporarily set INFERIOR_PTID. */
|
Remove save_inferior_ptid
This removes save_inferior_ptid, a cleanup function, in favor of
scoped_restore.
This also fixes a possible (it seems unlikely that it could happen in
practice) memory leak -- save_inferior_ptid should have used
make_cleanup_dtor, because it allocated memory.
I tested this on the buildbot. However, there are two caveats to
this. First, sometimes it seems I misread the results. Second, I
think this patch touches some platforms that can't be tested by the
buildbot. So, extra care seems warranted.
ChangeLog
2017-08-18 Tom Tromey <tom@tromey.com>
Pedro Alves <palves@redhat.com>
* spu-multiarch.c (parse_spufs_run): Use scoped_restore.
* sol-thread.c (sol_thread_resume, sol_thread_wait)
(sol_thread_xfer_partial, rw_common): Use scoped_restore.
* procfs.c (procfs_do_thread_registers): Use scoped_restore.
* proc-service.c (ps_xfer_memory): Use scoped_restore.
* linux-tdep.c (linux_corefile_thread): Remove a cleanup.
(linux_get_siginfo_data): Add "thread" argument. Use
scoped_restore.
* linux-nat.c (linux_child_follow_fork)
(check_stopped_by_watchpoint): Use scoped_restore.
* infrun.c (displaced_step_prepare_throw, write_memory_ptid)
(THREAD_STOPPED_BY, handle_signal_stop): Use scoped_restore.
(restore_inferior_ptid, save_inferior_ptid): Remove.
* btrace.c (btrace_fetch): Use scoped_restore.
* bsd-uthread.c (bsd_uthread_fetch_registers)
(bsd_uthread_store_registers): Use scoped_restore.
* breakpoint.c (reattach_breakpoints, detach_breakpoints): Use
scoped_restore.
* aix-thread.c (aix_thread_resume, aix_thread_wait)
(aix_thread_xfer_partial): Use scoped_restore.
* inferior.h (save_inferior_ptid): Remove.
2017-08-16 13:36:09 +08:00
|
|
|
scoped_restore save_inferior_ptid = make_scoped_restore (&inferior_ptid);
|
2017-05-02 17:35:54 +08:00
|
|
|
inferior_ptid = tp->ptid;
|
|
|
|
|
2016-11-30 18:05:38 +08:00
|
|
|
/* We should not be called on running or exited threads. */
|
|
|
|
gdb_assert (can_access_registers_ptid (tp->ptid));
|
|
|
|
|
2013-11-13 22:31:07 +08:00
|
|
|
btrace_data_init (&btrace);
|
Remove save_inferior_ptid
This removes save_inferior_ptid, a cleanup function, in favor of
scoped_restore.
This also fixes a possible (it seems unlikely that it could happen in
practice) memory leak -- save_inferior_ptid should have used
make_cleanup_dtor, because it allocated memory.
I tested this on the buildbot. However, there are two caveats to
this. First, sometimes it seems I misread the results. Second, I
think this patch touches some platforms that can't be tested by the
buildbot. So, extra care seems warranted.
ChangeLog
2017-08-18 Tom Tromey <tom@tromey.com>
Pedro Alves <palves@redhat.com>
* spu-multiarch.c (parse_spufs_run): Use scoped_restore.
* sol-thread.c (sol_thread_resume, sol_thread_wait)
(sol_thread_xfer_partial, rw_common): Use scoped_restore.
* procfs.c (procfs_do_thread_registers): Use scoped_restore.
* proc-service.c (ps_xfer_memory): Use scoped_restore.
* linux-tdep.c (linux_corefile_thread): Remove a cleanup.
(linux_get_siginfo_data): Add "thread" argument. Use
scoped_restore.
* linux-nat.c (linux_child_follow_fork)
(check_stopped_by_watchpoint): Use scoped_restore.
* infrun.c (displaced_step_prepare_throw, write_memory_ptid)
(THREAD_STOPPED_BY, handle_signal_stop): Use scoped_restore.
(restore_inferior_ptid, save_inferior_ptid): Remove.
* btrace.c (btrace_fetch): Use scoped_restore.
* bsd-uthread.c (bsd_uthread_fetch_registers)
(bsd_uthread_store_registers): Use scoped_restore.
* breakpoint.c (reattach_breakpoints, detach_breakpoints): Use
scoped_restore.
* aix-thread.c (aix_thread_resume, aix_thread_wait)
(aix_thread_xfer_partial): Use scoped_restore.
* inferior.h (save_inferior_ptid): Remove.
2017-08-16 13:36:09 +08:00
|
|
|
cleanup = make_cleanup_btrace_data (&btrace);
|
2013-03-11 16:17:08 +08:00
|
|
|
|
2013-06-03 21:39:35 +08:00
|
|
|
/* Let's first try to extend the trace we already have. */
|
2017-05-30 18:47:37 +08:00
|
|
|
if (!btinfo->functions.empty ())
|
2013-06-03 21:39:35 +08:00
|
|
|
{
|
|
|
|
errcode = target_read_btrace (&btrace, tinfo, BTRACE_READ_DELTA);
|
|
|
|
if (errcode == 0)
|
|
|
|
{
|
|
|
|
/* Success. Let's try to stitch the traces together. */
|
record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
|
|
|
errcode = btrace_stitch_trace (&btrace, tp);
|
2013-06-03 21:39:35 +08:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
/* We failed to read delta trace. Let's try to read new trace. */
|
|
|
|
errcode = target_read_btrace (&btrace, tinfo, BTRACE_READ_NEW);
|
|
|
|
|
|
|
|
/* If we got any new trace, discard what we have. */
|
2013-11-13 22:31:07 +08:00
|
|
|
if (errcode == 0 && !btrace_data_empty (&btrace))
|
2013-06-03 21:39:35 +08:00
|
|
|
btrace_clear (tp);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* If we were not able to read the trace, we start over. */
|
|
|
|
if (errcode != 0)
|
|
|
|
{
|
|
|
|
btrace_clear (tp);
|
|
|
|
errcode = target_read_btrace (&btrace, tinfo, BTRACE_READ_ALL);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else
|
|
|
|
errcode = target_read_btrace (&btrace, tinfo, BTRACE_READ_ALL);
|
|
|
|
|
|
|
|
/* If we were not able to read the branch trace, signal an error. */
|
|
|
|
if (errcode != 0)
|
|
|
|
error (_("Failed to read branch trace."));
|
|
|
|
|
|
|
|
/* Compute the trace, provided we have any. */
|
2013-11-13 22:31:07 +08:00
|
|
|
if (!btrace_data_empty (&btrace))
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
{
|
2014-02-03 18:40:50 +08:00
|
|
|
/* Store the raw trace data. The stored data will be cleared in
|
|
|
|
btrace_clear, so we always append the new trace. */
|
|
|
|
btrace_data_append (&btinfo->data, &btrace);
|
btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
|
|
|
btrace_maint_clear (btinfo);
|
2014-02-03 18:40:50 +08:00
|
|
|
|
2013-06-03 21:39:35 +08:00
|
|
|
btrace_clear_history (btinfo);
|
2014-01-29 18:12:06 +08:00
|
|
|
btrace_compute_ftrace (tp, &btrace);
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
}
|
2013-03-11 16:17:08 +08:00
|
|
|
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
do_cleanups (cleanup);
|
2013-03-11 16:17:08 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* See btrace.h. */
|
|
|
|
|
|
|
|
void
|
|
|
|
btrace_clear (struct thread_info *tp)
|
|
|
|
{
|
|
|
|
struct btrace_thread_info *btinfo;
|
|
|
|
|
Centralize thread ID printing
Add a new function to print a thread ID, in the style of paddress,
plongest, etc. and adjust all CLI-reachable paths to use it.
This gives us a single place to tweak to print inferior-qualified
thread IDs later:
- [Switching to thread 1 (Thread 0x7ffff7fc2740 (LWP 8155))]
+ [Switching to thread 1.1 (Thread 0x7ffff7fc2740 (LWP 8155))]
etc., though for now, this has no user-visible change.
No regressions on x86_64 Fedora 20.
gdb/ChangeLog:
2016-01-13 Pedro Alves <palves@redhat.com>
* breakpoint.c (remove_threaded_breakpoints)
(print_one_breakpoint_location): Use print_thread_id.
* btrace.c (btrace_enable, btrace_disable, btrace_teardown)
(btrace_fetch, btrace_clear): Use print_thread_id.
* common/print-utils.c (CELLSIZE): Delete.
(get_cell): Rename to ...
(get_print_cell): ... this and made extern. Adjust call callers.
Adjust to use PRINT_CELL_SIZE.
* common/print-utils.h (get_print_cell): Declare.
(PRINT_CELL_SIZE): New.
* gdbthread.h (print_thread_id): Declare.
* infcmd.c (signal_command): Use print_thread_id.
* inferior.c (print_inferior): Use print_thread_id.
* infrun.c (handle_signal_stop)
(insert_exception_resume_breakpoint)
(insert_exception_resume_from_probe)
(print_signal_received_reason): Use print_thread_id.
* record-btrace.c (record_btrace_info)
(record_btrace_resume_thread, record_btrace_cancel_resume)
(record_btrace_step_thread, record_btrace_wait): Use
print_thread_id.
* thread.c (thread_apply_all_command): Use print_thread_id.
(print_thread_id): New function.
(thread_apply_command): Use print_thread_id.
(thread_command, thread_find_command, do_captured_thread_select):
Use print_thread_id.
2016-01-13 18:56:06 +08:00
|
|
|
DEBUG ("clear thread %s (%s)", print_thread_id (tp),
|
|
|
|
target_pid_to_str (tp->ptid));
|
2013-03-11 16:17:08 +08:00
|
|
|
|
2013-03-27 16:49:47 +08:00
|
|
|
/* Make sure btrace frames that may hold a pointer into the branch
|
|
|
|
trace data are destroyed. */
|
|
|
|
reinit_frame_cache ();
|
|
|
|
|
2013-03-11 16:17:08 +08:00
|
|
|
btinfo = &tp->btrace;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
btinfo->functions.clear ();
|
record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
|
|
|
btinfo->ngaps = 0;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
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/* Must clear the maint data before - it depends on BTINFO->DATA. */
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btrace_maint_clear (btinfo);
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2014-02-03 18:40:50 +08:00
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btrace_data_clear (&btinfo->data);
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2013-06-03 21:39:35 +08:00
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btrace_clear_history (btinfo);
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2013-03-11 16:17:08 +08:00
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}
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/* See btrace.h. */
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void
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btrace_free_objfile (struct objfile *objfile)
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{
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struct thread_info *tp;
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DEBUG ("free objfile");
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Fix next over threaded execl with "set scheduler-locking step".
Running gdb.threads/thread-execl.exp with scheduler-locking set to
"step" reveals a problem:
(gdb) next^M
[Thread 0x7ffff7fda700 (LWP 27168) exited]^M
[New LWP 27168]^M
[Thread 0x7ffff74ee700 (LWP 27174) exited]^M
process 27168 is executing new program: /home/jkratoch/redhat/gdb-clean/gdb/testsuite/gdb.threads/thread-execl^M
[Thread debugging using libthread_db enabled]^M
Using host libthread_db library "/lib64/libthread_db.so.1".^M
infrun.c:5225: internal-error: switch_back_to_stepped_thread: Assertion `!schedlock_applies (1)' failed.^M
A problem internal to GDB has been detected,^M
further debugging may prove unreliable.^M
Quit this debugging session? (y or n) FAIL: gdb.threads/thread-execl.exp: schedlock step: get to main in new image (GDB internal error)
The assertion is correct. The issue is that GDB is mistakenly trying
to switch back to an exited thread, that was previously stepping when
it exited. This is exactly the sort of thing the test wants to make
sure doesn't happen:
# Now set a breakpoint at `main', and step over the execl call. The
# breakpoint at main should be reached. GDB should not try to revert
# back to the old thread from the old image and resume stepping it
We don't see this bug with schedlock off only because a different
sequence of events makes GDB manage to delete the thread instead of
marking it exited.
This particular internal error can be fixed by making the loop over
all threads in switch_back_to_stepped_thread skip exited threads.
But, looking over other ALL_THREADS users, all either can or should be
skipping exited threads too. So for simplicity, this patch replaces
ALL_THREADS with a new macro that skips exited threads itself, and
updates everything to use it.
Tested on x86_64 Fedora 20.
gdb/
2014-06-19 Pedro Alves <palves@redhat.com>
* gdbthread.h (ALL_THREADS): Delete.
(ALL_NON_EXITED_THREADS): New macro.
* btrace.c (btrace_free_objfile): Use ALL_NON_EXITED_THREADS
instead of ALL_THREADS.
* infrun.c (find_thread_needs_step_over)
(switch_back_to_stepped_thread): Use ALL_NON_EXITED_THREADS
instead of ALL_THREADS.
* record-btrace.c (record_btrace_open)
(record_btrace_stop_recording, record_btrace_close)
(record_btrace_is_replaying, record_btrace_resume)
(record_btrace_find_thread_to_move, record_btrace_wait): Likewise.
* remote.c (append_pending_thread_resumptions): Likewise.
* thread.c (thread_apply_all_command): Likewise.
gdb/testsuite/
2014-06-19 Pedro Alves <palves@redhat.com>
* gdb.threads/thread-execl.exp (do_test): New procedure, factored
out from ...
(top level): ... here. Iterate running tests under different
scheduler-locking settings.
2014-06-19 18:59:03 +08:00
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ALL_NON_EXITED_THREADS (tp)
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2013-03-11 16:17:08 +08:00
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btrace_clear (tp);
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}
|
2013-03-11 16:28:58 +08:00
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#if defined (HAVE_LIBEXPAT)
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/* Check the btrace document version. */
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static void
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check_xml_btrace_version (struct gdb_xml_parser *parser,
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const struct gdb_xml_element *element,
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void *user_data, VEC (gdb_xml_value_s) *attributes)
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{
|
Add some more casts (1/2)
Note: I needed to split this patch in two, otherwise it's too big for
the mailing list.
This patch adds explicit casts to situations where a void pointer is
assigned to a pointer to the "real" type. Building in C++ mode requires
those assignments to use an explicit cast. This includes, for example:
- callback arguments (cleanups, comparison functions, ...)
- data attached to some object (objfile, program space, etc) in the form
of a void pointer
- "user data" passed to some function
This patch comes from the commit "(mostly) auto-generated patch to insert
casts needed for C++", taken from Pedro's C++ branch.
Only files built on x86 with --enable-targets=all are modified, so the
native files for other arches will need to be dealt with separately.
I built-tested this with --enable-targets=all and reg-tested. To my
surprise, a test case (selftest.exp) had to be adjusted.
Here's the ChangeLog entry. Again, this was relatively quick to make
despite the length, thanks to David Malcom's script, although I don't
believe it's very useful information in that particular case...
gdb/ChangeLog:
* aarch64-tdep.c (aarch64_make_prologue_cache): Add cast(s).
(aarch64_make_stub_cache): Likewise.
(value_of_aarch64_user_reg): Likewise.
* ada-lang.c (ada_inferior_data_cleanup): Likewise.
(get_ada_inferior_data): Likewise.
(get_ada_pspace_data): Likewise.
(ada_pspace_data_cleanup): Likewise.
(ada_complete_symbol_matcher): Likewise.
(ada_exc_search_name_matches): Likewise.
* ada-tasks.c (get_ada_tasks_pspace_data): Likewise.
(get_ada_tasks_inferior_data): Likewise.
* addrmap.c (addrmap_mutable_foreach_worker): Likewise.
(splay_obstack_alloc): Likewise.
(splay_obstack_free): Likewise.
* alpha-linux-tdep.c (alpha_linux_supply_gregset): Likewise.
(alpha_linux_collect_gregset): Likewise.
(alpha_linux_supply_fpregset): Likewise.
(alpha_linux_collect_fpregset): Likewise.
* alpha-mdebug-tdep.c (alpha_mdebug_frame_unwind_cache): Likewise.
* alpha-tdep.c (alpha_lds): Likewise.
(alpha_sts): Likewise.
(alpha_sigtramp_frame_unwind_cache): Likewise.
(alpha_heuristic_frame_unwind_cache): Likewise.
(alpha_supply_int_regs): Likewise.
(alpha_fill_int_regs): Likewise.
(alpha_supply_fp_regs): Likewise.
(alpha_fill_fp_regs): Likewise.
* alphanbsd-tdep.c (alphanbsd_supply_fpregset): Likewise.
(alphanbsd_aout_supply_gregset): Likewise.
(alphanbsd_supply_gregset): Likewise.
* amd64-linux-tdep.c (amd64_linux_init_abi): Likewise.
(amd64_x32_linux_init_abi): Likewise.
* amd64-nat.c (amd64_supply_native_gregset): Likewise.
(amd64_collect_native_gregset): Likewise.
* amd64-tdep.c (amd64_frame_cache): Likewise.
(amd64_sigtramp_frame_cache): Likewise.
(amd64_epilogue_frame_cache): Likewise.
(amd64_supply_fxsave): Likewise.
(amd64_supply_xsave): Likewise.
(amd64_collect_fxsave): Likewise.
(amd64_collect_xsave): Likewise.
* amd64-windows-tdep.c (amd64_windows_frame_cache): Likewise.
* amd64obsd-tdep.c (amd64obsd_trapframe_cache): Likewise.
* arm-linux-tdep.c (arm_linux_supply_gregset): Likewise.
(arm_linux_collect_gregset): Likewise.
(arm_linux_supply_nwfpe): Likewise.
(arm_linux_collect_nwfpe): Likewise.
(arm_linux_supply_vfp): Likewise.
(arm_linux_collect_vfp): Likewise.
* arm-tdep.c (arm_find_mapping_symbol): Likewise.
(arm_prologue_unwind_stop_reason): Likewise.
(arm_prologue_this_id): Likewise.
(arm_prologue_prev_register): Likewise.
(arm_exidx_data_free): Likewise.
(arm_find_exidx_entry): Likewise.
(arm_stub_this_id): Likewise.
(arm_m_exception_this_id): Likewise.
(arm_m_exception_prev_register): Likewise.
(arm_normal_frame_base): Likewise.
(gdb_print_insn_arm): Likewise.
(arm_objfile_data_free): Likewise.
(arm_record_special_symbol): Likewise.
(value_of_arm_user_reg): Likewise.
* armbsd-tdep.c (armbsd_supply_fpregset): Likewise.
(armbsd_supply_gregset): Likewise.
* auto-load.c (auto_load_pspace_data_cleanup): Likewise.
(get_auto_load_pspace_data): Likewise.
(hash_loaded_script_entry): Likewise.
(eq_loaded_script_entry): Likewise.
(clear_section_scripts): Likewise.
(collect_matching_scripts): Likewise.
* auxv.c (auxv_inferior_data_cleanup): Likewise.
(get_auxv_inferior_data): Likewise.
* avr-tdep.c (avr_frame_unwind_cache): Likewise.
* ax-general.c (do_free_agent_expr_cleanup): Likewise.
* bfd-target.c (target_bfd_xfer_partial): Likewise.
(target_bfd_xclose): Likewise.
(target_bfd_get_section_table): Likewise.
* bfin-tdep.c (bfin_frame_cache): Likewise.
* block.c (find_block_in_blockvector): Likewise.
(call_site_for_pc): Likewise.
(block_find_non_opaque_type_preferred): Likewise.
* break-catch-sig.c (signal_catchpoint_insert_location): Likewise.
(signal_catchpoint_remove_location): Likewise.
(signal_catchpoint_breakpoint_hit): Likewise.
(signal_catchpoint_print_one): Likewise.
(signal_catchpoint_print_mention): Likewise.
(signal_catchpoint_print_recreate): Likewise.
* break-catch-syscall.c (get_catch_syscall_inferior_data): Likewise.
* breakpoint.c (do_cleanup_counted_command_line): Likewise.
(bp_location_compare_addrs): Likewise.
(get_first_locp_gte_addr): Likewise.
(check_tracepoint_command): Likewise.
(do_map_commands_command): Likewise.
(get_breakpoint_objfile_data): Likewise.
(free_breakpoint_probes): Likewise.
(do_captured_breakpoint_query): Likewise.
(compare_breakpoints): Likewise.
(bp_location_compare): Likewise.
(bpstat_remove_breakpoint_callback): Likewise.
(do_delete_breakpoint_cleanup): Likewise.
* bsd-uthread.c (bsd_uthread_set_supply_uthread): Likewise.
(bsd_uthread_set_collect_uthread): Likewise.
(bsd_uthread_activate): Likewise.
(bsd_uthread_fetch_registers): Likewise.
(bsd_uthread_store_registers): Likewise.
* btrace.c (check_xml_btrace_version): Likewise.
(parse_xml_btrace_block): Likewise.
(parse_xml_btrace_pt_config_cpu): Likewise.
(parse_xml_btrace_pt_raw): Likewise.
(parse_xml_btrace_pt): Likewise.
(parse_xml_btrace_conf_bts): Likewise.
(parse_xml_btrace_conf_pt): Likewise.
(do_btrace_data_cleanup): Likewise.
* c-typeprint.c (find_typedef_for_canonicalize): Likewise.
* charset.c (cleanup_iconv): Likewise.
(do_cleanup_iterator): Likewise.
* cli-out.c (cli_uiout_dtor): Likewise.
(cli_table_begin): Likewise.
(cli_table_body): Likewise.
(cli_table_end): Likewise.
(cli_table_header): Likewise.
(cli_begin): Likewise.
(cli_end): Likewise.
(cli_field_int): Likewise.
(cli_field_skip): Likewise.
(cli_field_string): Likewise.
(cli_field_fmt): Likewise.
(cli_spaces): Likewise.
(cli_text): Likewise.
(cli_message): Likewise.
(cli_wrap_hint): Likewise.
(cli_flush): Likewise.
(cli_redirect): Likewise.
(out_field_fmt): Likewise.
(field_separator): Likewise.
(cli_out_set_stream): Likewise.
* cli/cli-cmds.c (compare_symtabs): Likewise.
* cli/cli-dump.c (call_dump_func): Likewise.
(restore_section_callback): Likewise.
* cli/cli-script.c (clear_hook_in_cleanup): Likewise.
(do_restore_user_call_depth): Likewise.
(do_free_command_lines_cleanup): Likewise.
* coff-pe-read.c (get_section_vmas): Likewise.
(pe_as16): Likewise.
(pe_as32): Likewise.
* coffread.c (coff_symfile_read): Likewise.
* common/agent.c (agent_look_up_symbols): Likewise.
* common/filestuff.c (do_close_cleanup): Likewise.
* common/format.c (free_format_pieces_cleanup): Likewise.
* common/vec.c (vec_o_reserve): Likewise.
* compile/compile-c-support.c (print_one_macro): Likewise.
* compile/compile-c-symbols.c (hash_symbol_error): Likewise.
(eq_symbol_error): Likewise.
(del_symbol_error): Likewise.
(error_symbol_once): Likewise.
(gcc_convert_symbol): Likewise.
(gcc_symbol_address): Likewise.
(hash_symname): Likewise.
(eq_symname): Likewise.
* compile/compile-c-types.c (hash_type_map_instance): Likewise.
(eq_type_map_instance): Likewise.
(insert_type): Likewise.
(convert_type): Likewise.
* compile/compile-object-load.c (munmap_listp_free_cleanup): Likewise.
(setup_sections): Likewise.
(link_hash_table_free): Likewise.
(copy_sections): Likewise.
* compile/compile-object-run.c (do_module_cleanup): Likewise.
* compile/compile.c (compile_print_value): Likewise.
(do_rmdir): Likewise.
(cleanup_compile_instance): Likewise.
(cleanup_unlink_file): Likewise.
* completer.c (free_completion_tracker): Likewise.
* corelow.c (add_to_spuid_list): Likewise.
* cp-namespace.c (reset_directive_searched): Likewise.
* cp-support.c (reset_directive_searched): Likewise.
* cris-tdep.c (cris_sigtramp_frame_unwind_cache): Likewise.
(cris_frame_unwind_cache): Likewise.
* d-lang.c (builtin_d_type): Likewise.
* d-namespace.c (reset_directive_searched): Likewise.
* dbxread.c (dbx_free_symfile_info): Likewise.
(do_free_bincl_list_cleanup): Likewise.
* disasm.c (hash_dis_line_entry): Likewise.
(eq_dis_line_entry): Likewise.
(dis_asm_print_address): Likewise.
(fprintf_disasm): Likewise.
(do_ui_file_delete): Likewise.
* doublest.c (convert_floatformat_to_doublest): Likewise.
* dummy-frame.c (pop_dummy_frame_bpt): Likewise.
(dummy_frame_prev_register): Likewise.
(dummy_frame_this_id): Likewise.
* dwarf2-frame-tailcall.c (cache_hash): Likewise.
(cache_eq): Likewise.
(cache_find): Likewise.
(tailcall_frame_this_id): Likewise.
(dwarf2_tailcall_prev_register_first): Likewise.
(tailcall_frame_prev_register): Likewise.
(tailcall_frame_dealloc_cache): Likewise.
(tailcall_frame_prev_arch): Likewise.
* dwarf2-frame.c (dwarf2_frame_state_free): Likewise.
(dwarf2_frame_set_init_reg): Likewise.
(dwarf2_frame_init_reg): Likewise.
(dwarf2_frame_set_signal_frame_p): Likewise.
(dwarf2_frame_signal_frame_p): Likewise.
(dwarf2_frame_set_adjust_regnum): Likewise.
(dwarf2_frame_adjust_regnum): Likewise.
(clear_pointer_cleanup): Likewise.
(dwarf2_frame_cache): Likewise.
(find_cie): Likewise.
(dwarf2_frame_find_fde): Likewise.
* dwarf2expr.c (dwarf_expr_address_type): Likewise.
(free_dwarf_expr_context_cleanup): Likewise.
* dwarf2loc.c (locexpr_find_frame_base_location): Likewise.
(locexpr_get_frame_base): Likewise.
(loclist_find_frame_base_location): Likewise.
(loclist_get_frame_base): Likewise.
(dwarf_expr_dwarf_call): Likewise.
(dwarf_expr_get_base_type): Likewise.
(dwarf_expr_push_dwarf_reg_entry_value): Likewise.
(dwarf_expr_get_obj_addr): Likewise.
(entry_data_value_coerce_ref): Likewise.
(entry_data_value_copy_closure): Likewise.
(entry_data_value_free_closure): Likewise.
(get_frame_address_in_block_wrapper): Likewise.
(dwarf2_evaluate_property): Likewise.
(dwarf2_compile_property_to_c): Likewise.
(needs_frame_read_addr_from_reg): Likewise.
(needs_frame_get_reg_value): Likewise.
(needs_frame_frame_base): Likewise.
(needs_frame_frame_cfa): Likewise.
(needs_frame_tls_address): Likewise.
(needs_frame_dwarf_call): Likewise.
(needs_dwarf_reg_entry_value): Likewise.
(get_ax_pc): Likewise.
(locexpr_read_variable): Likewise.
(locexpr_read_variable_at_entry): Likewise.
(locexpr_read_needs_frame): Likewise.
(locexpr_describe_location): Likewise.
(locexpr_tracepoint_var_ref): Likewise.
(locexpr_generate_c_location): Likewise.
(loclist_read_variable): Likewise.
(loclist_read_variable_at_entry): Likewise.
(loclist_describe_location): Likewise.
(loclist_tracepoint_var_ref): Likewise.
(loclist_generate_c_location): Likewise.
* dwarf2read.c (line_header_hash_voidp): Likewise.
(line_header_eq_voidp): Likewise.
(dwarf2_has_info): Likewise.
(dwarf2_get_section_info): Likewise.
(locate_dwz_sections): Likewise.
(hash_file_name_entry): Likewise.
(eq_file_name_entry): Likewise.
(delete_file_name_entry): Likewise.
(dw2_setup): Likewise.
(dw2_get_file_names_reader): Likewise.
(dw2_find_pc_sect_compunit_symtab): Likewise.
(hash_signatured_type): Likewise.
(eq_signatured_type): Likewise.
(add_signatured_type_cu_to_table): Likewise.
(create_debug_types_hash_table): Likewise.
(lookup_dwo_signatured_type): Likewise.
(lookup_dwp_signatured_type): Likewise.
(lookup_signatured_type): Likewise.
(hash_type_unit_group): Likewise.
(eq_type_unit_group): Likewise.
(get_type_unit_group): Likewise.
(process_psymtab_comp_unit_reader): Likewise.
(sort_tu_by_abbrev_offset): Likewise.
(process_skeletonless_type_unit): Likewise.
(psymtabs_addrmap_cleanup): Likewise.
(dwarf2_read_symtab): Likewise.
(psymtab_to_symtab_1): Likewise.
(die_hash): Likewise.
(die_eq): Likewise.
(load_full_comp_unit_reader): Likewise.
(reset_die_in_process): Likewise.
(free_cu_line_header): Likewise.
(handle_DW_AT_stmt_list): Likewise.
(hash_dwo_file): Likewise.
(eq_dwo_file): Likewise.
(hash_dwo_unit): Likewise.
(eq_dwo_unit): Likewise.
(create_dwo_cu_reader): Likewise.
(create_dwo_unit_in_dwp_v1): Likewise.
(create_dwo_unit_in_dwp_v2): Likewise.
(lookup_dwo_unit_in_dwp): Likewise.
(dwarf2_locate_dwo_sections): Likewise.
(dwarf2_locate_common_dwp_sections): Likewise.
(dwarf2_locate_v2_dwp_sections): Likewise.
(hash_dwp_loaded_cutus): Likewise.
(eq_dwp_loaded_cutus): Likewise.
(lookup_dwo_cutu): Likewise.
(abbrev_table_free_cleanup): Likewise.
(dwarf2_free_abbrev_table): Likewise.
(find_partial_die_in_comp_unit): Likewise.
(free_line_header_voidp): Likewise.
(follow_die_offset): Likewise.
(follow_die_sig_1): Likewise.
(free_heap_comp_unit): Likewise.
(free_stack_comp_unit): Likewise.
(dwarf2_free_objfile): Likewise.
(per_cu_offset_and_type_hash): Likewise.
(per_cu_offset_and_type_eq): Likewise.
(get_die_type_at_offset): Likewise.
(partial_die_hash): Likewise.
(partial_die_eq): Likewise.
(dwarf2_per_objfile_free): Likewise.
(hash_strtab_entry): Likewise.
(eq_strtab_entry): Likewise.
(add_string): Likewise.
(hash_symtab_entry): Likewise.
(eq_symtab_entry): Likewise.
(delete_symtab_entry): Likewise.
(cleanup_mapped_symtab): Likewise.
(add_indices_to_cpool): Likewise.
(hash_psymtab_cu_index): Likewise.
(eq_psymtab_cu_index): Likewise.
(add_address_entry_worker): Likewise.
(unlink_if_set): Likewise.
(write_one_signatured_type): Likewise.
(save_gdb_index_command): Likewise.
* elfread.c (elf_symtab_read): Likewise.
(elf_gnu_ifunc_cache_hash): Likewise.
(elf_gnu_ifunc_cache_eq): Likewise.
(elf_gnu_ifunc_record_cache): Likewise.
(elf_gnu_ifunc_resolve_by_cache): Likewise.
(elf_get_probes): Likewise.
(probe_key_free): Likewise.
* f-lang.c (builtin_f_type): Likewise.
* frame-base.c (frame_base_append_sniffer): Likewise.
(frame_base_set_default): Likewise.
(frame_base_find_by_frame): Likewise.
* frame-unwind.c (frame_unwind_prepend_unwinder): Likewise.
(frame_unwind_append_unwinder): Likewise.
(frame_unwind_find_by_frame): Likewise.
* frame.c (frame_addr_hash): Likewise.
(frame_addr_hash_eq): Likewise.
(frame_stash_find): Likewise.
(do_frame_register_read): Likewise.
(unwind_to_current_frame): Likewise.
(frame_cleanup_after_sniffer): Likewise.
* frv-linux-tdep.c (frv_linux_sigtramp_frame_cache): Likewise.
* frv-tdep.c (frv_frame_unwind_cache): Likewise.
* ft32-tdep.c (ft32_frame_cache): Likewise.
* gcore.c (do_bfd_delete_cleanup): Likewise.
(gcore_create_callback): Likewise.
* gdb_bfd.c (hash_bfd): Likewise.
(eq_bfd): Likewise.
(gdb_bfd_open): Likewise.
(free_one_bfd_section): Likewise.
(gdb_bfd_ref): Likewise.
(gdb_bfd_unref): Likewise.
(get_section_descriptor): Likewise.
(gdb_bfd_map_section): Likewise.
(gdb_bfd_crc): Likewise.
(gdb_bfd_mark_parent): Likewise.
(gdb_bfd_record_inclusion): Likewise.
(gdb_bfd_requires_relocations): Likewise.
(print_one_bfd): Likewise.
* gdbtypes.c (type_pair_hash): Likewise.
(type_pair_eq): Likewise.
(builtin_type): Likewise.
(objfile_type): Likewise.
* gnu-v3-abi.c (vtable_ptrdiff_type): Likewise.
(vtable_address_point_offset): Likewise.
(gnuv3_get_vtable): Likewise.
(hash_value_and_voffset): Likewise.
(eq_value_and_voffset): Likewise.
(compare_value_and_voffset): Likewise.
(compute_vtable_size): Likewise.
(gnuv3_get_typeid_type): Likewise.
* go-lang.c (builtin_go_type): Likewise.
* guile/scm-block.c (bkscm_hash_block_smob): Likewise.
(bkscm_eq_block_smob): Likewise.
(bkscm_objfile_block_map): Likewise.
(bkscm_del_objfile_blocks): Likewise.
* guile/scm-breakpoint.c (bpscm_build_bp_list): Likewise.
* guile/scm-disasm.c (gdbscm_disasm_read_memory_worker): Likewise.
(gdbscm_disasm_print_address): Likewise.
* guile/scm-frame.c (frscm_hash_frame_smob): Likewise.
(frscm_eq_frame_smob): Likewise.
(frscm_inferior_frame_map): Likewise.
(frscm_del_inferior_frames): Likewise.
* guile/scm-gsmob.c (gdbscm_add_objfile_ref): Likewise.
* guile/scm-objfile.c (ofscm_handle_objfile_deleted): Likewise.
(ofscm_objfile_smob_from_objfile): Likewise.
* guile/scm-ports.c (ioscm_write): Likewise.
(ioscm_file_port_delete): Likewise.
(ioscm_file_port_rewind): Likewise.
(ioscm_file_port_put): Likewise.
(ioscm_file_port_write): Likewise.
* guile/scm-progspace.c (psscm_handle_pspace_deleted): Likewise.
(psscm_pspace_smob_from_pspace): Likewise.
* guile/scm-safe-call.c (scscm_recording_pre_unwind_handler): Likewise.
(scscm_recording_unwind_handler): Likewise.
(gdbscm_with_catch): Likewise.
(scscm_call_0_body): Likewise.
(scscm_call_1_body): Likewise.
(scscm_call_2_body): Likewise.
(scscm_call_3_body): Likewise.
(scscm_call_4_body): Likewise.
(scscm_apply_1_body): Likewise.
(scscm_eval_scheme_string): Likewise.
(gdbscm_safe_eval_string): Likewise.
(scscm_source_scheme_script): Likewise.
(gdbscm_safe_source_script): Likewise.
* guile/scm-string.c (gdbscm_call_scm_to_stringn): Likewise.
(gdbscm_call_scm_from_stringn): Likewise.
* guile/scm-symbol.c (syscm_hash_symbol_smob): Likewise.
(syscm_eq_symbol_smob): Likewise.
(syscm_get_symbol_map): Likewise.
(syscm_del_objfile_symbols): Likewise.
* guile/scm-symtab.c (stscm_hash_symtab_smob): Likewise.
(stscm_eq_symtab_smob): Likewise.
(stscm_objfile_symtab_map): Likewise.
(stscm_del_objfile_symtabs): Likewise.
* guile/scm-type.c (tyscm_hash_type_smob): Likewise.
(tyscm_eq_type_smob): Likewise.
(tyscm_type_map): Likewise.
(tyscm_copy_type_recursive): Likewise.
(save_objfile_types): Likewise.
* guile/scm-utils.c (extract_arg): Likewise.
* h8300-tdep.c (h8300_frame_cache): Likewise.
* hppa-linux-tdep.c (hppa_linux_sigtramp_frame_unwind_cache): Likewise.
* hppa-tdep.c (compare_unwind_entries): Likewise.
(find_unwind_entry): Likewise.
(hppa_frame_cache): Likewise.
(hppa_stub_frame_unwind_cache): Likewise.
* hppanbsd-tdep.c (hppanbsd_supply_gregset): Likewise.
* hppaobsd-tdep.c (hppaobsd_supply_gregset): Likewise.
(hppaobsd_supply_fpregset): Likewise.
* i386-cygwin-tdep.c (core_process_module_section): Likewise.
* i386-linux-tdep.c (i386_linux_init_abi): Likewise.
* i386-tdep.c (i386_frame_cache): Likewise.
(i386_epilogue_frame_cache): Likewise.
(i386_sigtramp_frame_cache): Likewise.
(i386_supply_gregset): Likewise.
(i386_collect_gregset): Likewise.
(i386_gdbarch_init): Likewise.
* i386obsd-tdep.c (i386obsd_aout_supply_regset): Likewise.
(i386obsd_trapframe_cache): Likewise.
* i387-tdep.c (i387_supply_fsave): Likewise.
(i387_collect_fsave): Likewise.
(i387_supply_fxsave): Likewise.
(i387_collect_fxsave): Likewise.
(i387_supply_xsave): Likewise.
(i387_collect_xsave): Likewise.
* ia64-tdep.c (ia64_frame_cache): Likewise.
(ia64_sigtramp_frame_cache): Likewise.
* infcmd.c (attach_command_continuation): Likewise.
(attach_command_continuation_free_args): Likewise.
* inferior.c (restore_inferior): Likewise.
(delete_thread_of_inferior): Likewise.
* inflow.c (inflow_inferior_data_cleanup): Likewise.
(get_inflow_inferior_data): Likewise.
(inflow_inferior_exit): Likewise.
* infrun.c (displaced_step_clear_cleanup): Likewise.
(restore_current_uiout_cleanup): Likewise.
(release_stop_context_cleanup): Likewise.
(do_restore_infcall_suspend_state_cleanup): Likewise.
(do_restore_infcall_control_state_cleanup): Likewise.
(restore_inferior_ptid): Likewise.
* inline-frame.c (block_starting_point_at): Likewise.
* iq2000-tdep.c (iq2000_frame_cache): Likewise.
* jit.c (get_jit_objfile_data): Likewise.
(get_jit_program_space_data): Likewise.
(jit_object_close_impl): Likewise.
(jit_find_objf_with_entry_addr): Likewise.
(jit_breakpoint_deleted): Likewise.
(jit_unwind_reg_set_impl): Likewise.
(jit_unwind_reg_get_impl): Likewise.
(jit_dealloc_cache): Likewise.
(jit_frame_sniffer): Likewise.
(jit_frame_prev_register): Likewise.
(jit_prepend_unwinder): Likewise.
(jit_inferior_exit_hook): Likewise.
(free_objfile_data): Likewise.
* jv-lang.c (jv_per_objfile_free): Likewise.
(get_dynamics_objfile): Likewise.
(get_java_class_symtab): Likewise.
(builtin_java_type): Likewise.
* language.c (language_string_char_type): Likewise.
(language_bool_type): Likewise.
(language_lookup_primitive_type): Likewise.
(language_lookup_primitive_type_as_symbol): Likewise.
* linespec.c (hash_address_entry): Likewise.
(eq_address_entry): Likewise.
(iterate_inline_only): Likewise.
(iterate_name_matcher): Likewise.
(decode_line_2_compare_items): Likewise.
(collect_one_symbol): Likewise.
(compare_symbols): Likewise.
(compare_msymbols): Likewise.
(add_symtabs_to_list): Likewise.
(collect_symbols): Likewise.
(compare_msyms): Likewise.
(add_minsym): Likewise.
(cleanup_linespec_result): Likewise.
* linux-fork.c (inferior_call_waitpid_cleanup): Likewise.
* linux-nat.c (delete_lwp_cleanup): Likewise.
(count_events_callback): Likewise.
(select_event_lwp_callback): Likewise.
(resume_stopped_resumed_lwps): Likewise.
* linux-tdep.c (get_linux_gdbarch_data): Likewise.
(invalidate_linux_cache_inf): Likewise.
(get_linux_inferior_data): Likewise.
(linux_find_memory_regions_thunk): Likewise.
(linux_make_mappings_callback): Likewise.
(linux_corefile_thread_callback): Likewise.
(find_mapping_size): Likewise.
* linux-thread-db.c (find_new_threads_callback): Likewise.
* lm32-tdep.c (lm32_frame_cache): Likewise.
* m2-lang.c (builtin_m2_type): Likewise.
* m32c-tdep.c (m32c_analyze_frame_prologue): Likewise.
* m32r-linux-tdep.c (m32r_linux_sigtramp_frame_cache): Likewise.
(m32r_linux_supply_gregset): Likewise.
(m32r_linux_collect_gregset): Likewise.
* m32r-tdep.c (m32r_frame_unwind_cache): Likewise.
* m68hc11-tdep.c (m68hc11_frame_unwind_cache): Likewise.
* m68k-tdep.c (m68k_frame_cache): Likewise.
* m68kbsd-tdep.c (m68kbsd_supply_fpregset): Likewise.
(m68kbsd_supply_gregset): Likewise.
* m68klinux-tdep.c (m68k_linux_sigtramp_frame_cache): Likewise.
* m88k-tdep.c (m88k_frame_cache): Likewise.
(m88k_supply_gregset): Likewise.
gdb/gdbserver/ChangeLog:
* dll.c (match_dll): Add cast(s).
(unloaded_dll): Likewise.
* linux-low.c (second_thread_of_pid_p): Likewise.
(delete_lwp_callback): Likewise.
(count_events_callback): Likewise.
(select_event_lwp_callback): Likewise.
(linux_set_resume_request): Likewise.
* server.c (accumulate_file_name_length): Likewise.
(emit_dll_description): Likewise.
(handle_qxfer_threads_worker): Likewise.
(visit_actioned_threads): Likewise.
* thread-db.c (any_thread_of): Likewise.
* tracepoint.c (same_process_p): Likewise.
(match_blocktype): Likewise.
(build_traceframe_info_xml): Likewise.
gdb/testsuite/ChangeLog:
* gdb.gdb/selftest.exp (do_steps_and_nexts): Adjust expected
source line.
2015-09-26 02:08:07 +08:00
|
|
|
const char *version
|
|
|
|
= (const char *) xml_find_attribute (attributes, "version")->value;
|
2013-03-11 16:28:58 +08:00
|
|
|
|
|
|
|
if (strcmp (version, "1.0") != 0)
|
|
|
|
gdb_xml_error (parser, _("Unsupported btrace version: \"%s\""), version);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Parse a btrace "block" xml record. */
|
|
|
|
|
|
|
|
static void
|
|
|
|
parse_xml_btrace_block (struct gdb_xml_parser *parser,
|
|
|
|
const struct gdb_xml_element *element,
|
|
|
|
void *user_data, VEC (gdb_xml_value_s) *attributes)
|
|
|
|
{
|
2013-11-13 22:31:07 +08:00
|
|
|
struct btrace_data *btrace;
|
2013-03-11 16:28:58 +08:00
|
|
|
struct btrace_block *block;
|
|
|
|
ULONGEST *begin, *end;
|
|
|
|
|
Add some more casts (1/2)
Note: I needed to split this patch in two, otherwise it's too big for
the mailing list.
This patch adds explicit casts to situations where a void pointer is
assigned to a pointer to the "real" type. Building in C++ mode requires
those assignments to use an explicit cast. This includes, for example:
- callback arguments (cleanups, comparison functions, ...)
- data attached to some object (objfile, program space, etc) in the form
of a void pointer
- "user data" passed to some function
This patch comes from the commit "(mostly) auto-generated patch to insert
casts needed for C++", taken from Pedro's C++ branch.
Only files built on x86 with --enable-targets=all are modified, so the
native files for other arches will need to be dealt with separately.
I built-tested this with --enable-targets=all and reg-tested. To my
surprise, a test case (selftest.exp) had to be adjusted.
Here's the ChangeLog entry. Again, this was relatively quick to make
despite the length, thanks to David Malcom's script, although I don't
believe it's very useful information in that particular case...
gdb/ChangeLog:
* aarch64-tdep.c (aarch64_make_prologue_cache): Add cast(s).
(aarch64_make_stub_cache): Likewise.
(value_of_aarch64_user_reg): Likewise.
* ada-lang.c (ada_inferior_data_cleanup): Likewise.
(get_ada_inferior_data): Likewise.
(get_ada_pspace_data): Likewise.
(ada_pspace_data_cleanup): Likewise.
(ada_complete_symbol_matcher): Likewise.
(ada_exc_search_name_matches): Likewise.
* ada-tasks.c (get_ada_tasks_pspace_data): Likewise.
(get_ada_tasks_inferior_data): Likewise.
* addrmap.c (addrmap_mutable_foreach_worker): Likewise.
(splay_obstack_alloc): Likewise.
(splay_obstack_free): Likewise.
* alpha-linux-tdep.c (alpha_linux_supply_gregset): Likewise.
(alpha_linux_collect_gregset): Likewise.
(alpha_linux_supply_fpregset): Likewise.
(alpha_linux_collect_fpregset): Likewise.
* alpha-mdebug-tdep.c (alpha_mdebug_frame_unwind_cache): Likewise.
* alpha-tdep.c (alpha_lds): Likewise.
(alpha_sts): Likewise.
(alpha_sigtramp_frame_unwind_cache): Likewise.
(alpha_heuristic_frame_unwind_cache): Likewise.
(alpha_supply_int_regs): Likewise.
(alpha_fill_int_regs): Likewise.
(alpha_supply_fp_regs): Likewise.
(alpha_fill_fp_regs): Likewise.
* alphanbsd-tdep.c (alphanbsd_supply_fpregset): Likewise.
(alphanbsd_aout_supply_gregset): Likewise.
(alphanbsd_supply_gregset): Likewise.
* amd64-linux-tdep.c (amd64_linux_init_abi): Likewise.
(amd64_x32_linux_init_abi): Likewise.
* amd64-nat.c (amd64_supply_native_gregset): Likewise.
(amd64_collect_native_gregset): Likewise.
* amd64-tdep.c (amd64_frame_cache): Likewise.
(amd64_sigtramp_frame_cache): Likewise.
(amd64_epilogue_frame_cache): Likewise.
(amd64_supply_fxsave): Likewise.
(amd64_supply_xsave): Likewise.
(amd64_collect_fxsave): Likewise.
(amd64_collect_xsave): Likewise.
* amd64-windows-tdep.c (amd64_windows_frame_cache): Likewise.
* amd64obsd-tdep.c (amd64obsd_trapframe_cache): Likewise.
* arm-linux-tdep.c (arm_linux_supply_gregset): Likewise.
(arm_linux_collect_gregset): Likewise.
(arm_linux_supply_nwfpe): Likewise.
(arm_linux_collect_nwfpe): Likewise.
(arm_linux_supply_vfp): Likewise.
(arm_linux_collect_vfp): Likewise.
* arm-tdep.c (arm_find_mapping_symbol): Likewise.
(arm_prologue_unwind_stop_reason): Likewise.
(arm_prologue_this_id): Likewise.
(arm_prologue_prev_register): Likewise.
(arm_exidx_data_free): Likewise.
(arm_find_exidx_entry): Likewise.
(arm_stub_this_id): Likewise.
(arm_m_exception_this_id): Likewise.
(arm_m_exception_prev_register): Likewise.
(arm_normal_frame_base): Likewise.
(gdb_print_insn_arm): Likewise.
(arm_objfile_data_free): Likewise.
(arm_record_special_symbol): Likewise.
(value_of_arm_user_reg): Likewise.
* armbsd-tdep.c (armbsd_supply_fpregset): Likewise.
(armbsd_supply_gregset): Likewise.
* auto-load.c (auto_load_pspace_data_cleanup): Likewise.
(get_auto_load_pspace_data): Likewise.
(hash_loaded_script_entry): Likewise.
(eq_loaded_script_entry): Likewise.
(clear_section_scripts): Likewise.
(collect_matching_scripts): Likewise.
* auxv.c (auxv_inferior_data_cleanup): Likewise.
(get_auxv_inferior_data): Likewise.
* avr-tdep.c (avr_frame_unwind_cache): Likewise.
* ax-general.c (do_free_agent_expr_cleanup): Likewise.
* bfd-target.c (target_bfd_xfer_partial): Likewise.
(target_bfd_xclose): Likewise.
(target_bfd_get_section_table): Likewise.
* bfin-tdep.c (bfin_frame_cache): Likewise.
* block.c (find_block_in_blockvector): Likewise.
(call_site_for_pc): Likewise.
(block_find_non_opaque_type_preferred): Likewise.
* break-catch-sig.c (signal_catchpoint_insert_location): Likewise.
(signal_catchpoint_remove_location): Likewise.
(signal_catchpoint_breakpoint_hit): Likewise.
(signal_catchpoint_print_one): Likewise.
(signal_catchpoint_print_mention): Likewise.
(signal_catchpoint_print_recreate): Likewise.
* break-catch-syscall.c (get_catch_syscall_inferior_data): Likewise.
* breakpoint.c (do_cleanup_counted_command_line): Likewise.
(bp_location_compare_addrs): Likewise.
(get_first_locp_gte_addr): Likewise.
(check_tracepoint_command): Likewise.
(do_map_commands_command): Likewise.
(get_breakpoint_objfile_data): Likewise.
(free_breakpoint_probes): Likewise.
(do_captured_breakpoint_query): Likewise.
(compare_breakpoints): Likewise.
(bp_location_compare): Likewise.
(bpstat_remove_breakpoint_callback): Likewise.
(do_delete_breakpoint_cleanup): Likewise.
* bsd-uthread.c (bsd_uthread_set_supply_uthread): Likewise.
(bsd_uthread_set_collect_uthread): Likewise.
(bsd_uthread_activate): Likewise.
(bsd_uthread_fetch_registers): Likewise.
(bsd_uthread_store_registers): Likewise.
* btrace.c (check_xml_btrace_version): Likewise.
(parse_xml_btrace_block): Likewise.
(parse_xml_btrace_pt_config_cpu): Likewise.
(parse_xml_btrace_pt_raw): Likewise.
(parse_xml_btrace_pt): Likewise.
(parse_xml_btrace_conf_bts): Likewise.
(parse_xml_btrace_conf_pt): Likewise.
(do_btrace_data_cleanup): Likewise.
* c-typeprint.c (find_typedef_for_canonicalize): Likewise.
* charset.c (cleanup_iconv): Likewise.
(do_cleanup_iterator): Likewise.
* cli-out.c (cli_uiout_dtor): Likewise.
(cli_table_begin): Likewise.
(cli_table_body): Likewise.
(cli_table_end): Likewise.
(cli_table_header): Likewise.
(cli_begin): Likewise.
(cli_end): Likewise.
(cli_field_int): Likewise.
(cli_field_skip): Likewise.
(cli_field_string): Likewise.
(cli_field_fmt): Likewise.
(cli_spaces): Likewise.
(cli_text): Likewise.
(cli_message): Likewise.
(cli_wrap_hint): Likewise.
(cli_flush): Likewise.
(cli_redirect): Likewise.
(out_field_fmt): Likewise.
(field_separator): Likewise.
(cli_out_set_stream): Likewise.
* cli/cli-cmds.c (compare_symtabs): Likewise.
* cli/cli-dump.c (call_dump_func): Likewise.
(restore_section_callback): Likewise.
* cli/cli-script.c (clear_hook_in_cleanup): Likewise.
(do_restore_user_call_depth): Likewise.
(do_free_command_lines_cleanup): Likewise.
* coff-pe-read.c (get_section_vmas): Likewise.
(pe_as16): Likewise.
(pe_as32): Likewise.
* coffread.c (coff_symfile_read): Likewise.
* common/agent.c (agent_look_up_symbols): Likewise.
* common/filestuff.c (do_close_cleanup): Likewise.
* common/format.c (free_format_pieces_cleanup): Likewise.
* common/vec.c (vec_o_reserve): Likewise.
* compile/compile-c-support.c (print_one_macro): Likewise.
* compile/compile-c-symbols.c (hash_symbol_error): Likewise.
(eq_symbol_error): Likewise.
(del_symbol_error): Likewise.
(error_symbol_once): Likewise.
(gcc_convert_symbol): Likewise.
(gcc_symbol_address): Likewise.
(hash_symname): Likewise.
(eq_symname): Likewise.
* compile/compile-c-types.c (hash_type_map_instance): Likewise.
(eq_type_map_instance): Likewise.
(insert_type): Likewise.
(convert_type): Likewise.
* compile/compile-object-load.c (munmap_listp_free_cleanup): Likewise.
(setup_sections): Likewise.
(link_hash_table_free): Likewise.
(copy_sections): Likewise.
* compile/compile-object-run.c (do_module_cleanup): Likewise.
* compile/compile.c (compile_print_value): Likewise.
(do_rmdir): Likewise.
(cleanup_compile_instance): Likewise.
(cleanup_unlink_file): Likewise.
* completer.c (free_completion_tracker): Likewise.
* corelow.c (add_to_spuid_list): Likewise.
* cp-namespace.c (reset_directive_searched): Likewise.
* cp-support.c (reset_directive_searched): Likewise.
* cris-tdep.c (cris_sigtramp_frame_unwind_cache): Likewise.
(cris_frame_unwind_cache): Likewise.
* d-lang.c (builtin_d_type): Likewise.
* d-namespace.c (reset_directive_searched): Likewise.
* dbxread.c (dbx_free_symfile_info): Likewise.
(do_free_bincl_list_cleanup): Likewise.
* disasm.c (hash_dis_line_entry): Likewise.
(eq_dis_line_entry): Likewise.
(dis_asm_print_address): Likewise.
(fprintf_disasm): Likewise.
(do_ui_file_delete): Likewise.
* doublest.c (convert_floatformat_to_doublest): Likewise.
* dummy-frame.c (pop_dummy_frame_bpt): Likewise.
(dummy_frame_prev_register): Likewise.
(dummy_frame_this_id): Likewise.
* dwarf2-frame-tailcall.c (cache_hash): Likewise.
(cache_eq): Likewise.
(cache_find): Likewise.
(tailcall_frame_this_id): Likewise.
(dwarf2_tailcall_prev_register_first): Likewise.
(tailcall_frame_prev_register): Likewise.
(tailcall_frame_dealloc_cache): Likewise.
(tailcall_frame_prev_arch): Likewise.
* dwarf2-frame.c (dwarf2_frame_state_free): Likewise.
(dwarf2_frame_set_init_reg): Likewise.
(dwarf2_frame_init_reg): Likewise.
(dwarf2_frame_set_signal_frame_p): Likewise.
(dwarf2_frame_signal_frame_p): Likewise.
(dwarf2_frame_set_adjust_regnum): Likewise.
(dwarf2_frame_adjust_regnum): Likewise.
(clear_pointer_cleanup): Likewise.
(dwarf2_frame_cache): Likewise.
(find_cie): Likewise.
(dwarf2_frame_find_fde): Likewise.
* dwarf2expr.c (dwarf_expr_address_type): Likewise.
(free_dwarf_expr_context_cleanup): Likewise.
* dwarf2loc.c (locexpr_find_frame_base_location): Likewise.
(locexpr_get_frame_base): Likewise.
(loclist_find_frame_base_location): Likewise.
(loclist_get_frame_base): Likewise.
(dwarf_expr_dwarf_call): Likewise.
(dwarf_expr_get_base_type): Likewise.
(dwarf_expr_push_dwarf_reg_entry_value): Likewise.
(dwarf_expr_get_obj_addr): Likewise.
(entry_data_value_coerce_ref): Likewise.
(entry_data_value_copy_closure): Likewise.
(entry_data_value_free_closure): Likewise.
(get_frame_address_in_block_wrapper): Likewise.
(dwarf2_evaluate_property): Likewise.
(dwarf2_compile_property_to_c): Likewise.
(needs_frame_read_addr_from_reg): Likewise.
(needs_frame_get_reg_value): Likewise.
(needs_frame_frame_base): Likewise.
(needs_frame_frame_cfa): Likewise.
(needs_frame_tls_address): Likewise.
(needs_frame_dwarf_call): Likewise.
(needs_dwarf_reg_entry_value): Likewise.
(get_ax_pc): Likewise.
(locexpr_read_variable): Likewise.
(locexpr_read_variable_at_entry): Likewise.
(locexpr_read_needs_frame): Likewise.
(locexpr_describe_location): Likewise.
(locexpr_tracepoint_var_ref): Likewise.
(locexpr_generate_c_location): Likewise.
(loclist_read_variable): Likewise.
(loclist_read_variable_at_entry): Likewise.
(loclist_describe_location): Likewise.
(loclist_tracepoint_var_ref): Likewise.
(loclist_generate_c_location): Likewise.
* dwarf2read.c (line_header_hash_voidp): Likewise.
(line_header_eq_voidp): Likewise.
(dwarf2_has_info): Likewise.
(dwarf2_get_section_info): Likewise.
(locate_dwz_sections): Likewise.
(hash_file_name_entry): Likewise.
(eq_file_name_entry): Likewise.
(delete_file_name_entry): Likewise.
(dw2_setup): Likewise.
(dw2_get_file_names_reader): Likewise.
(dw2_find_pc_sect_compunit_symtab): Likewise.
(hash_signatured_type): Likewise.
(eq_signatured_type): Likewise.
(add_signatured_type_cu_to_table): Likewise.
(create_debug_types_hash_table): Likewise.
(lookup_dwo_signatured_type): Likewise.
(lookup_dwp_signatured_type): Likewise.
(lookup_signatured_type): Likewise.
(hash_type_unit_group): Likewise.
(eq_type_unit_group): Likewise.
(get_type_unit_group): Likewise.
(process_psymtab_comp_unit_reader): Likewise.
(sort_tu_by_abbrev_offset): Likewise.
(process_skeletonless_type_unit): Likewise.
(psymtabs_addrmap_cleanup): Likewise.
(dwarf2_read_symtab): Likewise.
(psymtab_to_symtab_1): Likewise.
(die_hash): Likewise.
(die_eq): Likewise.
(load_full_comp_unit_reader): Likewise.
(reset_die_in_process): Likewise.
(free_cu_line_header): Likewise.
(handle_DW_AT_stmt_list): Likewise.
(hash_dwo_file): Likewise.
(eq_dwo_file): Likewise.
(hash_dwo_unit): Likewise.
(eq_dwo_unit): Likewise.
(create_dwo_cu_reader): Likewise.
(create_dwo_unit_in_dwp_v1): Likewise.
(create_dwo_unit_in_dwp_v2): Likewise.
(lookup_dwo_unit_in_dwp): Likewise.
(dwarf2_locate_dwo_sections): Likewise.
(dwarf2_locate_common_dwp_sections): Likewise.
(dwarf2_locate_v2_dwp_sections): Likewise.
(hash_dwp_loaded_cutus): Likewise.
(eq_dwp_loaded_cutus): Likewise.
(lookup_dwo_cutu): Likewise.
(abbrev_table_free_cleanup): Likewise.
(dwarf2_free_abbrev_table): Likewise.
(find_partial_die_in_comp_unit): Likewise.
(free_line_header_voidp): Likewise.
(follow_die_offset): Likewise.
(follow_die_sig_1): Likewise.
(free_heap_comp_unit): Likewise.
(free_stack_comp_unit): Likewise.
(dwarf2_free_objfile): Likewise.
(per_cu_offset_and_type_hash): Likewise.
(per_cu_offset_and_type_eq): Likewise.
(get_die_type_at_offset): Likewise.
(partial_die_hash): Likewise.
(partial_die_eq): Likewise.
(dwarf2_per_objfile_free): Likewise.
(hash_strtab_entry): Likewise.
(eq_strtab_entry): Likewise.
(add_string): Likewise.
(hash_symtab_entry): Likewise.
(eq_symtab_entry): Likewise.
(delete_symtab_entry): Likewise.
(cleanup_mapped_symtab): Likewise.
(add_indices_to_cpool): Likewise.
(hash_psymtab_cu_index): Likewise.
(eq_psymtab_cu_index): Likewise.
(add_address_entry_worker): Likewise.
(unlink_if_set): Likewise.
(write_one_signatured_type): Likewise.
(save_gdb_index_command): Likewise.
* elfread.c (elf_symtab_read): Likewise.
(elf_gnu_ifunc_cache_hash): Likewise.
(elf_gnu_ifunc_cache_eq): Likewise.
(elf_gnu_ifunc_record_cache): Likewise.
(elf_gnu_ifunc_resolve_by_cache): Likewise.
(elf_get_probes): Likewise.
(probe_key_free): Likewise.
* f-lang.c (builtin_f_type): Likewise.
* frame-base.c (frame_base_append_sniffer): Likewise.
(frame_base_set_default): Likewise.
(frame_base_find_by_frame): Likewise.
* frame-unwind.c (frame_unwind_prepend_unwinder): Likewise.
(frame_unwind_append_unwinder): Likewise.
(frame_unwind_find_by_frame): Likewise.
* frame.c (frame_addr_hash): Likewise.
(frame_addr_hash_eq): Likewise.
(frame_stash_find): Likewise.
(do_frame_register_read): Likewise.
(unwind_to_current_frame): Likewise.
(frame_cleanup_after_sniffer): Likewise.
* frv-linux-tdep.c (frv_linux_sigtramp_frame_cache): Likewise.
* frv-tdep.c (frv_frame_unwind_cache): Likewise.
* ft32-tdep.c (ft32_frame_cache): Likewise.
* gcore.c (do_bfd_delete_cleanup): Likewise.
(gcore_create_callback): Likewise.
* gdb_bfd.c (hash_bfd): Likewise.
(eq_bfd): Likewise.
(gdb_bfd_open): Likewise.
(free_one_bfd_section): Likewise.
(gdb_bfd_ref): Likewise.
(gdb_bfd_unref): Likewise.
(get_section_descriptor): Likewise.
(gdb_bfd_map_section): Likewise.
(gdb_bfd_crc): Likewise.
(gdb_bfd_mark_parent): Likewise.
(gdb_bfd_record_inclusion): Likewise.
(gdb_bfd_requires_relocations): Likewise.
(print_one_bfd): Likewise.
* gdbtypes.c (type_pair_hash): Likewise.
(type_pair_eq): Likewise.
(builtin_type): Likewise.
(objfile_type): Likewise.
* gnu-v3-abi.c (vtable_ptrdiff_type): Likewise.
(vtable_address_point_offset): Likewise.
(gnuv3_get_vtable): Likewise.
(hash_value_and_voffset): Likewise.
(eq_value_and_voffset): Likewise.
(compare_value_and_voffset): Likewise.
(compute_vtable_size): Likewise.
(gnuv3_get_typeid_type): Likewise.
* go-lang.c (builtin_go_type): Likewise.
* guile/scm-block.c (bkscm_hash_block_smob): Likewise.
(bkscm_eq_block_smob): Likewise.
(bkscm_objfile_block_map): Likewise.
(bkscm_del_objfile_blocks): Likewise.
* guile/scm-breakpoint.c (bpscm_build_bp_list): Likewise.
* guile/scm-disasm.c (gdbscm_disasm_read_memory_worker): Likewise.
(gdbscm_disasm_print_address): Likewise.
* guile/scm-frame.c (frscm_hash_frame_smob): Likewise.
(frscm_eq_frame_smob): Likewise.
(frscm_inferior_frame_map): Likewise.
(frscm_del_inferior_frames): Likewise.
* guile/scm-gsmob.c (gdbscm_add_objfile_ref): Likewise.
* guile/scm-objfile.c (ofscm_handle_objfile_deleted): Likewise.
(ofscm_objfile_smob_from_objfile): Likewise.
* guile/scm-ports.c (ioscm_write): Likewise.
(ioscm_file_port_delete): Likewise.
(ioscm_file_port_rewind): Likewise.
(ioscm_file_port_put): Likewise.
(ioscm_file_port_write): Likewise.
* guile/scm-progspace.c (psscm_handle_pspace_deleted): Likewise.
(psscm_pspace_smob_from_pspace): Likewise.
* guile/scm-safe-call.c (scscm_recording_pre_unwind_handler): Likewise.
(scscm_recording_unwind_handler): Likewise.
(gdbscm_with_catch): Likewise.
(scscm_call_0_body): Likewise.
(scscm_call_1_body): Likewise.
(scscm_call_2_body): Likewise.
(scscm_call_3_body): Likewise.
(scscm_call_4_body): Likewise.
(scscm_apply_1_body): Likewise.
(scscm_eval_scheme_string): Likewise.
(gdbscm_safe_eval_string): Likewise.
(scscm_source_scheme_script): Likewise.
(gdbscm_safe_source_script): Likewise.
* guile/scm-string.c (gdbscm_call_scm_to_stringn): Likewise.
(gdbscm_call_scm_from_stringn): Likewise.
* guile/scm-symbol.c (syscm_hash_symbol_smob): Likewise.
(syscm_eq_symbol_smob): Likewise.
(syscm_get_symbol_map): Likewise.
(syscm_del_objfile_symbols): Likewise.
* guile/scm-symtab.c (stscm_hash_symtab_smob): Likewise.
(stscm_eq_symtab_smob): Likewise.
(stscm_objfile_symtab_map): Likewise.
(stscm_del_objfile_symtabs): Likewise.
* guile/scm-type.c (tyscm_hash_type_smob): Likewise.
(tyscm_eq_type_smob): Likewise.
(tyscm_type_map): Likewise.
(tyscm_copy_type_recursive): Likewise.
(save_objfile_types): Likewise.
* guile/scm-utils.c (extract_arg): Likewise.
* h8300-tdep.c (h8300_frame_cache): Likewise.
* hppa-linux-tdep.c (hppa_linux_sigtramp_frame_unwind_cache): Likewise.
* hppa-tdep.c (compare_unwind_entries): Likewise.
(find_unwind_entry): Likewise.
(hppa_frame_cache): Likewise.
(hppa_stub_frame_unwind_cache): Likewise.
* hppanbsd-tdep.c (hppanbsd_supply_gregset): Likewise.
* hppaobsd-tdep.c (hppaobsd_supply_gregset): Likewise.
(hppaobsd_supply_fpregset): Likewise.
* i386-cygwin-tdep.c (core_process_module_section): Likewise.
* i386-linux-tdep.c (i386_linux_init_abi): Likewise.
* i386-tdep.c (i386_frame_cache): Likewise.
(i386_epilogue_frame_cache): Likewise.
(i386_sigtramp_frame_cache): Likewise.
(i386_supply_gregset): Likewise.
(i386_collect_gregset): Likewise.
(i386_gdbarch_init): Likewise.
* i386obsd-tdep.c (i386obsd_aout_supply_regset): Likewise.
(i386obsd_trapframe_cache): Likewise.
* i387-tdep.c (i387_supply_fsave): Likewise.
(i387_collect_fsave): Likewise.
(i387_supply_fxsave): Likewise.
(i387_collect_fxsave): Likewise.
(i387_supply_xsave): Likewise.
(i387_collect_xsave): Likewise.
* ia64-tdep.c (ia64_frame_cache): Likewise.
(ia64_sigtramp_frame_cache): Likewise.
* infcmd.c (attach_command_continuation): Likewise.
(attach_command_continuation_free_args): Likewise.
* inferior.c (restore_inferior): Likewise.
(delete_thread_of_inferior): Likewise.
* inflow.c (inflow_inferior_data_cleanup): Likewise.
(get_inflow_inferior_data): Likewise.
(inflow_inferior_exit): Likewise.
* infrun.c (displaced_step_clear_cleanup): Likewise.
(restore_current_uiout_cleanup): Likewise.
(release_stop_context_cleanup): Likewise.
(do_restore_infcall_suspend_state_cleanup): Likewise.
(do_restore_infcall_control_state_cleanup): Likewise.
(restore_inferior_ptid): Likewise.
* inline-frame.c (block_starting_point_at): Likewise.
* iq2000-tdep.c (iq2000_frame_cache): Likewise.
* jit.c (get_jit_objfile_data): Likewise.
(get_jit_program_space_data): Likewise.
(jit_object_close_impl): Likewise.
(jit_find_objf_with_entry_addr): Likewise.
(jit_breakpoint_deleted): Likewise.
(jit_unwind_reg_set_impl): Likewise.
(jit_unwind_reg_get_impl): Likewise.
(jit_dealloc_cache): Likewise.
(jit_frame_sniffer): Likewise.
(jit_frame_prev_register): Likewise.
(jit_prepend_unwinder): Likewise.
(jit_inferior_exit_hook): Likewise.
(free_objfile_data): Likewise.
* jv-lang.c (jv_per_objfile_free): Likewise.
(get_dynamics_objfile): Likewise.
(get_java_class_symtab): Likewise.
(builtin_java_type): Likewise.
* language.c (language_string_char_type): Likewise.
(language_bool_type): Likewise.
(language_lookup_primitive_type): Likewise.
(language_lookup_primitive_type_as_symbol): Likewise.
* linespec.c (hash_address_entry): Likewise.
(eq_address_entry): Likewise.
(iterate_inline_only): Likewise.
(iterate_name_matcher): Likewise.
(decode_line_2_compare_items): Likewise.
(collect_one_symbol): Likewise.
(compare_symbols): Likewise.
(compare_msymbols): Likewise.
(add_symtabs_to_list): Likewise.
(collect_symbols): Likewise.
(compare_msyms): Likewise.
(add_minsym): Likewise.
(cleanup_linespec_result): Likewise.
* linux-fork.c (inferior_call_waitpid_cleanup): Likewise.
* linux-nat.c (delete_lwp_cleanup): Likewise.
(count_events_callback): Likewise.
(select_event_lwp_callback): Likewise.
(resume_stopped_resumed_lwps): Likewise.
* linux-tdep.c (get_linux_gdbarch_data): Likewise.
(invalidate_linux_cache_inf): Likewise.
(get_linux_inferior_data): Likewise.
(linux_find_memory_regions_thunk): Likewise.
(linux_make_mappings_callback): Likewise.
(linux_corefile_thread_callback): Likewise.
(find_mapping_size): Likewise.
* linux-thread-db.c (find_new_threads_callback): Likewise.
* lm32-tdep.c (lm32_frame_cache): Likewise.
* m2-lang.c (builtin_m2_type): Likewise.
* m32c-tdep.c (m32c_analyze_frame_prologue): Likewise.
* m32r-linux-tdep.c (m32r_linux_sigtramp_frame_cache): Likewise.
(m32r_linux_supply_gregset): Likewise.
(m32r_linux_collect_gregset): Likewise.
* m32r-tdep.c (m32r_frame_unwind_cache): Likewise.
* m68hc11-tdep.c (m68hc11_frame_unwind_cache): Likewise.
* m68k-tdep.c (m68k_frame_cache): Likewise.
* m68kbsd-tdep.c (m68kbsd_supply_fpregset): Likewise.
(m68kbsd_supply_gregset): Likewise.
* m68klinux-tdep.c (m68k_linux_sigtramp_frame_cache): Likewise.
* m88k-tdep.c (m88k_frame_cache): Likewise.
(m88k_supply_gregset): Likewise.
gdb/gdbserver/ChangeLog:
* dll.c (match_dll): Add cast(s).
(unloaded_dll): Likewise.
* linux-low.c (second_thread_of_pid_p): Likewise.
(delete_lwp_callback): Likewise.
(count_events_callback): Likewise.
(select_event_lwp_callback): Likewise.
(linux_set_resume_request): Likewise.
* server.c (accumulate_file_name_length): Likewise.
(emit_dll_description): Likewise.
(handle_qxfer_threads_worker): Likewise.
(visit_actioned_threads): Likewise.
* thread-db.c (any_thread_of): Likewise.
* tracepoint.c (same_process_p): Likewise.
(match_blocktype): Likewise.
(build_traceframe_info_xml): Likewise.
gdb/testsuite/ChangeLog:
* gdb.gdb/selftest.exp (do_steps_and_nexts): Adjust expected
source line.
2015-09-26 02:08:07 +08:00
|
|
|
btrace = (struct btrace_data *) user_data;
|
2013-11-13 22:31:07 +08:00
|
|
|
|
|
|
|
switch (btrace->format)
|
|
|
|
{
|
|
|
|
case BTRACE_FORMAT_BTS:
|
|
|
|
break;
|
|
|
|
|
|
|
|
case BTRACE_FORMAT_NONE:
|
|
|
|
btrace->format = BTRACE_FORMAT_BTS;
|
|
|
|
btrace->variant.bts.blocks = NULL;
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
gdb_xml_error (parser, _("Btrace format error."));
|
|
|
|
}
|
2013-03-11 16:28:58 +08:00
|
|
|
|
2015-09-27 05:15:05 +08:00
|
|
|
begin = (ULONGEST *) xml_find_attribute (attributes, "begin")->value;
|
|
|
|
end = (ULONGEST *) xml_find_attribute (attributes, "end")->value;
|
2013-03-11 16:28:58 +08:00
|
|
|
|
2013-11-13 22:31:07 +08:00
|
|
|
block = VEC_safe_push (btrace_block_s, btrace->variant.bts.blocks, NULL);
|
2013-03-11 16:28:58 +08:00
|
|
|
block->begin = *begin;
|
|
|
|
block->end = *end;
|
|
|
|
}
|
|
|
|
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
/* Parse a "raw" xml record. */
|
|
|
|
|
|
|
|
static void
|
|
|
|
parse_xml_raw (struct gdb_xml_parser *parser, const char *body_text,
|
2015-07-08 15:38:16 +08:00
|
|
|
gdb_byte **pdata, size_t *psize)
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
{
|
|
|
|
struct cleanup *cleanup;
|
|
|
|
gdb_byte *data, *bin;
|
2015-07-08 15:38:16 +08:00
|
|
|
size_t len, size;
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
|
|
|
|
len = strlen (body_text);
|
2015-07-08 15:38:16 +08:00
|
|
|
if (len % 2 != 0)
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
gdb_xml_error (parser, _("Bad raw data size."));
|
|
|
|
|
2015-07-08 15:38:16 +08:00
|
|
|
size = len / 2;
|
|
|
|
|
2015-09-26 02:08:06 +08:00
|
|
|
bin = data = (gdb_byte *) xmalloc (size);
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
cleanup = make_cleanup (xfree, data);
|
|
|
|
|
|
|
|
/* We use hex encoding - see common/rsp-low.h. */
|
|
|
|
while (len > 0)
|
|
|
|
{
|
|
|
|
char hi, lo;
|
|
|
|
|
|
|
|
hi = *body_text++;
|
|
|
|
lo = *body_text++;
|
|
|
|
|
|
|
|
if (hi == 0 || lo == 0)
|
|
|
|
gdb_xml_error (parser, _("Bad hex encoding."));
|
|
|
|
|
|
|
|
*bin++ = fromhex (hi) * 16 + fromhex (lo);
|
|
|
|
len -= 2;
|
|
|
|
}
|
|
|
|
|
|
|
|
discard_cleanups (cleanup);
|
|
|
|
|
|
|
|
*pdata = data;
|
|
|
|
*psize = size;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Parse a btrace pt-config "cpu" xml record. */
|
|
|
|
|
|
|
|
static void
|
|
|
|
parse_xml_btrace_pt_config_cpu (struct gdb_xml_parser *parser,
|
|
|
|
const struct gdb_xml_element *element,
|
|
|
|
void *user_data,
|
|
|
|
VEC (gdb_xml_value_s) *attributes)
|
|
|
|
{
|
|
|
|
struct btrace_data *btrace;
|
|
|
|
const char *vendor;
|
|
|
|
ULONGEST *family, *model, *stepping;
|
|
|
|
|
Add some more casts (1/2)
Note: I needed to split this patch in two, otherwise it's too big for
the mailing list.
This patch adds explicit casts to situations where a void pointer is
assigned to a pointer to the "real" type. Building in C++ mode requires
those assignments to use an explicit cast. This includes, for example:
- callback arguments (cleanups, comparison functions, ...)
- data attached to some object (objfile, program space, etc) in the form
of a void pointer
- "user data" passed to some function
This patch comes from the commit "(mostly) auto-generated patch to insert
casts needed for C++", taken from Pedro's C++ branch.
Only files built on x86 with --enable-targets=all are modified, so the
native files for other arches will need to be dealt with separately.
I built-tested this with --enable-targets=all and reg-tested. To my
surprise, a test case (selftest.exp) had to be adjusted.
Here's the ChangeLog entry. Again, this was relatively quick to make
despite the length, thanks to David Malcom's script, although I don't
believe it's very useful information in that particular case...
gdb/ChangeLog:
* aarch64-tdep.c (aarch64_make_prologue_cache): Add cast(s).
(aarch64_make_stub_cache): Likewise.
(value_of_aarch64_user_reg): Likewise.
* ada-lang.c (ada_inferior_data_cleanup): Likewise.
(get_ada_inferior_data): Likewise.
(get_ada_pspace_data): Likewise.
(ada_pspace_data_cleanup): Likewise.
(ada_complete_symbol_matcher): Likewise.
(ada_exc_search_name_matches): Likewise.
* ada-tasks.c (get_ada_tasks_pspace_data): Likewise.
(get_ada_tasks_inferior_data): Likewise.
* addrmap.c (addrmap_mutable_foreach_worker): Likewise.
(splay_obstack_alloc): Likewise.
(splay_obstack_free): Likewise.
* alpha-linux-tdep.c (alpha_linux_supply_gregset): Likewise.
(alpha_linux_collect_gregset): Likewise.
(alpha_linux_supply_fpregset): Likewise.
(alpha_linux_collect_fpregset): Likewise.
* alpha-mdebug-tdep.c (alpha_mdebug_frame_unwind_cache): Likewise.
* alpha-tdep.c (alpha_lds): Likewise.
(alpha_sts): Likewise.
(alpha_sigtramp_frame_unwind_cache): Likewise.
(alpha_heuristic_frame_unwind_cache): Likewise.
(alpha_supply_int_regs): Likewise.
(alpha_fill_int_regs): Likewise.
(alpha_supply_fp_regs): Likewise.
(alpha_fill_fp_regs): Likewise.
* alphanbsd-tdep.c (alphanbsd_supply_fpregset): Likewise.
(alphanbsd_aout_supply_gregset): Likewise.
(alphanbsd_supply_gregset): Likewise.
* amd64-linux-tdep.c (amd64_linux_init_abi): Likewise.
(amd64_x32_linux_init_abi): Likewise.
* amd64-nat.c (amd64_supply_native_gregset): Likewise.
(amd64_collect_native_gregset): Likewise.
* amd64-tdep.c (amd64_frame_cache): Likewise.
(amd64_sigtramp_frame_cache): Likewise.
(amd64_epilogue_frame_cache): Likewise.
(amd64_supply_fxsave): Likewise.
(amd64_supply_xsave): Likewise.
(amd64_collect_fxsave): Likewise.
(amd64_collect_xsave): Likewise.
* amd64-windows-tdep.c (amd64_windows_frame_cache): Likewise.
* amd64obsd-tdep.c (amd64obsd_trapframe_cache): Likewise.
* arm-linux-tdep.c (arm_linux_supply_gregset): Likewise.
(arm_linux_collect_gregset): Likewise.
(arm_linux_supply_nwfpe): Likewise.
(arm_linux_collect_nwfpe): Likewise.
(arm_linux_supply_vfp): Likewise.
(arm_linux_collect_vfp): Likewise.
* arm-tdep.c (arm_find_mapping_symbol): Likewise.
(arm_prologue_unwind_stop_reason): Likewise.
(arm_prologue_this_id): Likewise.
(arm_prologue_prev_register): Likewise.
(arm_exidx_data_free): Likewise.
(arm_find_exidx_entry): Likewise.
(arm_stub_this_id): Likewise.
(arm_m_exception_this_id): Likewise.
(arm_m_exception_prev_register): Likewise.
(arm_normal_frame_base): Likewise.
(gdb_print_insn_arm): Likewise.
(arm_objfile_data_free): Likewise.
(arm_record_special_symbol): Likewise.
(value_of_arm_user_reg): Likewise.
* armbsd-tdep.c (armbsd_supply_fpregset): Likewise.
(armbsd_supply_gregset): Likewise.
* auto-load.c (auto_load_pspace_data_cleanup): Likewise.
(get_auto_load_pspace_data): Likewise.
(hash_loaded_script_entry): Likewise.
(eq_loaded_script_entry): Likewise.
(clear_section_scripts): Likewise.
(collect_matching_scripts): Likewise.
* auxv.c (auxv_inferior_data_cleanup): Likewise.
(get_auxv_inferior_data): Likewise.
* avr-tdep.c (avr_frame_unwind_cache): Likewise.
* ax-general.c (do_free_agent_expr_cleanup): Likewise.
* bfd-target.c (target_bfd_xfer_partial): Likewise.
(target_bfd_xclose): Likewise.
(target_bfd_get_section_table): Likewise.
* bfin-tdep.c (bfin_frame_cache): Likewise.
* block.c (find_block_in_blockvector): Likewise.
(call_site_for_pc): Likewise.
(block_find_non_opaque_type_preferred): Likewise.
* break-catch-sig.c (signal_catchpoint_insert_location): Likewise.
(signal_catchpoint_remove_location): Likewise.
(signal_catchpoint_breakpoint_hit): Likewise.
(signal_catchpoint_print_one): Likewise.
(signal_catchpoint_print_mention): Likewise.
(signal_catchpoint_print_recreate): Likewise.
* break-catch-syscall.c (get_catch_syscall_inferior_data): Likewise.
* breakpoint.c (do_cleanup_counted_command_line): Likewise.
(bp_location_compare_addrs): Likewise.
(get_first_locp_gte_addr): Likewise.
(check_tracepoint_command): Likewise.
(do_map_commands_command): Likewise.
(get_breakpoint_objfile_data): Likewise.
(free_breakpoint_probes): Likewise.
(do_captured_breakpoint_query): Likewise.
(compare_breakpoints): Likewise.
(bp_location_compare): Likewise.
(bpstat_remove_breakpoint_callback): Likewise.
(do_delete_breakpoint_cleanup): Likewise.
* bsd-uthread.c (bsd_uthread_set_supply_uthread): Likewise.
(bsd_uthread_set_collect_uthread): Likewise.
(bsd_uthread_activate): Likewise.
(bsd_uthread_fetch_registers): Likewise.
(bsd_uthread_store_registers): Likewise.
* btrace.c (check_xml_btrace_version): Likewise.
(parse_xml_btrace_block): Likewise.
(parse_xml_btrace_pt_config_cpu): Likewise.
(parse_xml_btrace_pt_raw): Likewise.
(parse_xml_btrace_pt): Likewise.
(parse_xml_btrace_conf_bts): Likewise.
(parse_xml_btrace_conf_pt): Likewise.
(do_btrace_data_cleanup): Likewise.
* c-typeprint.c (find_typedef_for_canonicalize): Likewise.
* charset.c (cleanup_iconv): Likewise.
(do_cleanup_iterator): Likewise.
* cli-out.c (cli_uiout_dtor): Likewise.
(cli_table_begin): Likewise.
(cli_table_body): Likewise.
(cli_table_end): Likewise.
(cli_table_header): Likewise.
(cli_begin): Likewise.
(cli_end): Likewise.
(cli_field_int): Likewise.
(cli_field_skip): Likewise.
(cli_field_string): Likewise.
(cli_field_fmt): Likewise.
(cli_spaces): Likewise.
(cli_text): Likewise.
(cli_message): Likewise.
(cli_wrap_hint): Likewise.
(cli_flush): Likewise.
(cli_redirect): Likewise.
(out_field_fmt): Likewise.
(field_separator): Likewise.
(cli_out_set_stream): Likewise.
* cli/cli-cmds.c (compare_symtabs): Likewise.
* cli/cli-dump.c (call_dump_func): Likewise.
(restore_section_callback): Likewise.
* cli/cli-script.c (clear_hook_in_cleanup): Likewise.
(do_restore_user_call_depth): Likewise.
(do_free_command_lines_cleanup): Likewise.
* coff-pe-read.c (get_section_vmas): Likewise.
(pe_as16): Likewise.
(pe_as32): Likewise.
* coffread.c (coff_symfile_read): Likewise.
* common/agent.c (agent_look_up_symbols): Likewise.
* common/filestuff.c (do_close_cleanup): Likewise.
* common/format.c (free_format_pieces_cleanup): Likewise.
* common/vec.c (vec_o_reserve): Likewise.
* compile/compile-c-support.c (print_one_macro): Likewise.
* compile/compile-c-symbols.c (hash_symbol_error): Likewise.
(eq_symbol_error): Likewise.
(del_symbol_error): Likewise.
(error_symbol_once): Likewise.
(gcc_convert_symbol): Likewise.
(gcc_symbol_address): Likewise.
(hash_symname): Likewise.
(eq_symname): Likewise.
* compile/compile-c-types.c (hash_type_map_instance): Likewise.
(eq_type_map_instance): Likewise.
(insert_type): Likewise.
(convert_type): Likewise.
* compile/compile-object-load.c (munmap_listp_free_cleanup): Likewise.
(setup_sections): Likewise.
(link_hash_table_free): Likewise.
(copy_sections): Likewise.
* compile/compile-object-run.c (do_module_cleanup): Likewise.
* compile/compile.c (compile_print_value): Likewise.
(do_rmdir): Likewise.
(cleanup_compile_instance): Likewise.
(cleanup_unlink_file): Likewise.
* completer.c (free_completion_tracker): Likewise.
* corelow.c (add_to_spuid_list): Likewise.
* cp-namespace.c (reset_directive_searched): Likewise.
* cp-support.c (reset_directive_searched): Likewise.
* cris-tdep.c (cris_sigtramp_frame_unwind_cache): Likewise.
(cris_frame_unwind_cache): Likewise.
* d-lang.c (builtin_d_type): Likewise.
* d-namespace.c (reset_directive_searched): Likewise.
* dbxread.c (dbx_free_symfile_info): Likewise.
(do_free_bincl_list_cleanup): Likewise.
* disasm.c (hash_dis_line_entry): Likewise.
(eq_dis_line_entry): Likewise.
(dis_asm_print_address): Likewise.
(fprintf_disasm): Likewise.
(do_ui_file_delete): Likewise.
* doublest.c (convert_floatformat_to_doublest): Likewise.
* dummy-frame.c (pop_dummy_frame_bpt): Likewise.
(dummy_frame_prev_register): Likewise.
(dummy_frame_this_id): Likewise.
* dwarf2-frame-tailcall.c (cache_hash): Likewise.
(cache_eq): Likewise.
(cache_find): Likewise.
(tailcall_frame_this_id): Likewise.
(dwarf2_tailcall_prev_register_first): Likewise.
(tailcall_frame_prev_register): Likewise.
(tailcall_frame_dealloc_cache): Likewise.
(tailcall_frame_prev_arch): Likewise.
* dwarf2-frame.c (dwarf2_frame_state_free): Likewise.
(dwarf2_frame_set_init_reg): Likewise.
(dwarf2_frame_init_reg): Likewise.
(dwarf2_frame_set_signal_frame_p): Likewise.
(dwarf2_frame_signal_frame_p): Likewise.
(dwarf2_frame_set_adjust_regnum): Likewise.
(dwarf2_frame_adjust_regnum): Likewise.
(clear_pointer_cleanup): Likewise.
(dwarf2_frame_cache): Likewise.
(find_cie): Likewise.
(dwarf2_frame_find_fde): Likewise.
* dwarf2expr.c (dwarf_expr_address_type): Likewise.
(free_dwarf_expr_context_cleanup): Likewise.
* dwarf2loc.c (locexpr_find_frame_base_location): Likewise.
(locexpr_get_frame_base): Likewise.
(loclist_find_frame_base_location): Likewise.
(loclist_get_frame_base): Likewise.
(dwarf_expr_dwarf_call): Likewise.
(dwarf_expr_get_base_type): Likewise.
(dwarf_expr_push_dwarf_reg_entry_value): Likewise.
(dwarf_expr_get_obj_addr): Likewise.
(entry_data_value_coerce_ref): Likewise.
(entry_data_value_copy_closure): Likewise.
(entry_data_value_free_closure): Likewise.
(get_frame_address_in_block_wrapper): Likewise.
(dwarf2_evaluate_property): Likewise.
(dwarf2_compile_property_to_c): Likewise.
(needs_frame_read_addr_from_reg): Likewise.
(needs_frame_get_reg_value): Likewise.
(needs_frame_frame_base): Likewise.
(needs_frame_frame_cfa): Likewise.
(needs_frame_tls_address): Likewise.
(needs_frame_dwarf_call): Likewise.
(needs_dwarf_reg_entry_value): Likewise.
(get_ax_pc): Likewise.
(locexpr_read_variable): Likewise.
(locexpr_read_variable_at_entry): Likewise.
(locexpr_read_needs_frame): Likewise.
(locexpr_describe_location): Likewise.
(locexpr_tracepoint_var_ref): Likewise.
(locexpr_generate_c_location): Likewise.
(loclist_read_variable): Likewise.
(loclist_read_variable_at_entry): Likewise.
(loclist_describe_location): Likewise.
(loclist_tracepoint_var_ref): Likewise.
(loclist_generate_c_location): Likewise.
* dwarf2read.c (line_header_hash_voidp): Likewise.
(line_header_eq_voidp): Likewise.
(dwarf2_has_info): Likewise.
(dwarf2_get_section_info): Likewise.
(locate_dwz_sections): Likewise.
(hash_file_name_entry): Likewise.
(eq_file_name_entry): Likewise.
(delete_file_name_entry): Likewise.
(dw2_setup): Likewise.
(dw2_get_file_names_reader): Likewise.
(dw2_find_pc_sect_compunit_symtab): Likewise.
(hash_signatured_type): Likewise.
(eq_signatured_type): Likewise.
(add_signatured_type_cu_to_table): Likewise.
(create_debug_types_hash_table): Likewise.
(lookup_dwo_signatured_type): Likewise.
(lookup_dwp_signatured_type): Likewise.
(lookup_signatured_type): Likewise.
(hash_type_unit_group): Likewise.
(eq_type_unit_group): Likewise.
(get_type_unit_group): Likewise.
(process_psymtab_comp_unit_reader): Likewise.
(sort_tu_by_abbrev_offset): Likewise.
(process_skeletonless_type_unit): Likewise.
(psymtabs_addrmap_cleanup): Likewise.
(dwarf2_read_symtab): Likewise.
(psymtab_to_symtab_1): Likewise.
(die_hash): Likewise.
(die_eq): Likewise.
(load_full_comp_unit_reader): Likewise.
(reset_die_in_process): Likewise.
(free_cu_line_header): Likewise.
(handle_DW_AT_stmt_list): Likewise.
(hash_dwo_file): Likewise.
(eq_dwo_file): Likewise.
(hash_dwo_unit): Likewise.
(eq_dwo_unit): Likewise.
(create_dwo_cu_reader): Likewise.
(create_dwo_unit_in_dwp_v1): Likewise.
(create_dwo_unit_in_dwp_v2): Likewise.
(lookup_dwo_unit_in_dwp): Likewise.
(dwarf2_locate_dwo_sections): Likewise.
(dwarf2_locate_common_dwp_sections): Likewise.
(dwarf2_locate_v2_dwp_sections): Likewise.
(hash_dwp_loaded_cutus): Likewise.
(eq_dwp_loaded_cutus): Likewise.
(lookup_dwo_cutu): Likewise.
(abbrev_table_free_cleanup): Likewise.
(dwarf2_free_abbrev_table): Likewise.
(find_partial_die_in_comp_unit): Likewise.
(free_line_header_voidp): Likewise.
(follow_die_offset): Likewise.
(follow_die_sig_1): Likewise.
(free_heap_comp_unit): Likewise.
(free_stack_comp_unit): Likewise.
(dwarf2_free_objfile): Likewise.
(per_cu_offset_and_type_hash): Likewise.
(per_cu_offset_and_type_eq): Likewise.
(get_die_type_at_offset): Likewise.
(partial_die_hash): Likewise.
(partial_die_eq): Likewise.
(dwarf2_per_objfile_free): Likewise.
(hash_strtab_entry): Likewise.
(eq_strtab_entry): Likewise.
(add_string): Likewise.
(hash_symtab_entry): Likewise.
(eq_symtab_entry): Likewise.
(delete_symtab_entry): Likewise.
(cleanup_mapped_symtab): Likewise.
(add_indices_to_cpool): Likewise.
(hash_psymtab_cu_index): Likewise.
(eq_psymtab_cu_index): Likewise.
(add_address_entry_worker): Likewise.
(unlink_if_set): Likewise.
(write_one_signatured_type): Likewise.
(save_gdb_index_command): Likewise.
* elfread.c (elf_symtab_read): Likewise.
(elf_gnu_ifunc_cache_hash): Likewise.
(elf_gnu_ifunc_cache_eq): Likewise.
(elf_gnu_ifunc_record_cache): Likewise.
(elf_gnu_ifunc_resolve_by_cache): Likewise.
(elf_get_probes): Likewise.
(probe_key_free): Likewise.
* f-lang.c (builtin_f_type): Likewise.
* frame-base.c (frame_base_append_sniffer): Likewise.
(frame_base_set_default): Likewise.
(frame_base_find_by_frame): Likewise.
* frame-unwind.c (frame_unwind_prepend_unwinder): Likewise.
(frame_unwind_append_unwinder): Likewise.
(frame_unwind_find_by_frame): Likewise.
* frame.c (frame_addr_hash): Likewise.
(frame_addr_hash_eq): Likewise.
(frame_stash_find): Likewise.
(do_frame_register_read): Likewise.
(unwind_to_current_frame): Likewise.
(frame_cleanup_after_sniffer): Likewise.
* frv-linux-tdep.c (frv_linux_sigtramp_frame_cache): Likewise.
* frv-tdep.c (frv_frame_unwind_cache): Likewise.
* ft32-tdep.c (ft32_frame_cache): Likewise.
* gcore.c (do_bfd_delete_cleanup): Likewise.
(gcore_create_callback): Likewise.
* gdb_bfd.c (hash_bfd): Likewise.
(eq_bfd): Likewise.
(gdb_bfd_open): Likewise.
(free_one_bfd_section): Likewise.
(gdb_bfd_ref): Likewise.
(gdb_bfd_unref): Likewise.
(get_section_descriptor): Likewise.
(gdb_bfd_map_section): Likewise.
(gdb_bfd_crc): Likewise.
(gdb_bfd_mark_parent): Likewise.
(gdb_bfd_record_inclusion): Likewise.
(gdb_bfd_requires_relocations): Likewise.
(print_one_bfd): Likewise.
* gdbtypes.c (type_pair_hash): Likewise.
(type_pair_eq): Likewise.
(builtin_type): Likewise.
(objfile_type): Likewise.
* gnu-v3-abi.c (vtable_ptrdiff_type): Likewise.
(vtable_address_point_offset): Likewise.
(gnuv3_get_vtable): Likewise.
(hash_value_and_voffset): Likewise.
(eq_value_and_voffset): Likewise.
(compare_value_and_voffset): Likewise.
(compute_vtable_size): Likewise.
(gnuv3_get_typeid_type): Likewise.
* go-lang.c (builtin_go_type): Likewise.
* guile/scm-block.c (bkscm_hash_block_smob): Likewise.
(bkscm_eq_block_smob): Likewise.
(bkscm_objfile_block_map): Likewise.
(bkscm_del_objfile_blocks): Likewise.
* guile/scm-breakpoint.c (bpscm_build_bp_list): Likewise.
* guile/scm-disasm.c (gdbscm_disasm_read_memory_worker): Likewise.
(gdbscm_disasm_print_address): Likewise.
* guile/scm-frame.c (frscm_hash_frame_smob): Likewise.
(frscm_eq_frame_smob): Likewise.
(frscm_inferior_frame_map): Likewise.
(frscm_del_inferior_frames): Likewise.
* guile/scm-gsmob.c (gdbscm_add_objfile_ref): Likewise.
* guile/scm-objfile.c (ofscm_handle_objfile_deleted): Likewise.
(ofscm_objfile_smob_from_objfile): Likewise.
* guile/scm-ports.c (ioscm_write): Likewise.
(ioscm_file_port_delete): Likewise.
(ioscm_file_port_rewind): Likewise.
(ioscm_file_port_put): Likewise.
(ioscm_file_port_write): Likewise.
* guile/scm-progspace.c (psscm_handle_pspace_deleted): Likewise.
(psscm_pspace_smob_from_pspace): Likewise.
* guile/scm-safe-call.c (scscm_recording_pre_unwind_handler): Likewise.
(scscm_recording_unwind_handler): Likewise.
(gdbscm_with_catch): Likewise.
(scscm_call_0_body): Likewise.
(scscm_call_1_body): Likewise.
(scscm_call_2_body): Likewise.
(scscm_call_3_body): Likewise.
(scscm_call_4_body): Likewise.
(scscm_apply_1_body): Likewise.
(scscm_eval_scheme_string): Likewise.
(gdbscm_safe_eval_string): Likewise.
(scscm_source_scheme_script): Likewise.
(gdbscm_safe_source_script): Likewise.
* guile/scm-string.c (gdbscm_call_scm_to_stringn): Likewise.
(gdbscm_call_scm_from_stringn): Likewise.
* guile/scm-symbol.c (syscm_hash_symbol_smob): Likewise.
(syscm_eq_symbol_smob): Likewise.
(syscm_get_symbol_map): Likewise.
(syscm_del_objfile_symbols): Likewise.
* guile/scm-symtab.c (stscm_hash_symtab_smob): Likewise.
(stscm_eq_symtab_smob): Likewise.
(stscm_objfile_symtab_map): Likewise.
(stscm_del_objfile_symtabs): Likewise.
* guile/scm-type.c (tyscm_hash_type_smob): Likewise.
(tyscm_eq_type_smob): Likewise.
(tyscm_type_map): Likewise.
(tyscm_copy_type_recursive): Likewise.
(save_objfile_types): Likewise.
* guile/scm-utils.c (extract_arg): Likewise.
* h8300-tdep.c (h8300_frame_cache): Likewise.
* hppa-linux-tdep.c (hppa_linux_sigtramp_frame_unwind_cache): Likewise.
* hppa-tdep.c (compare_unwind_entries): Likewise.
(find_unwind_entry): Likewise.
(hppa_frame_cache): Likewise.
(hppa_stub_frame_unwind_cache): Likewise.
* hppanbsd-tdep.c (hppanbsd_supply_gregset): Likewise.
* hppaobsd-tdep.c (hppaobsd_supply_gregset): Likewise.
(hppaobsd_supply_fpregset): Likewise.
* i386-cygwin-tdep.c (core_process_module_section): Likewise.
* i386-linux-tdep.c (i386_linux_init_abi): Likewise.
* i386-tdep.c (i386_frame_cache): Likewise.
(i386_epilogue_frame_cache): Likewise.
(i386_sigtramp_frame_cache): Likewise.
(i386_supply_gregset): Likewise.
(i386_collect_gregset): Likewise.
(i386_gdbarch_init): Likewise.
* i386obsd-tdep.c (i386obsd_aout_supply_regset): Likewise.
(i386obsd_trapframe_cache): Likewise.
* i387-tdep.c (i387_supply_fsave): Likewise.
(i387_collect_fsave): Likewise.
(i387_supply_fxsave): Likewise.
(i387_collect_fxsave): Likewise.
(i387_supply_xsave): Likewise.
(i387_collect_xsave): Likewise.
* ia64-tdep.c (ia64_frame_cache): Likewise.
(ia64_sigtramp_frame_cache): Likewise.
* infcmd.c (attach_command_continuation): Likewise.
(attach_command_continuation_free_args): Likewise.
* inferior.c (restore_inferior): Likewise.
(delete_thread_of_inferior): Likewise.
* inflow.c (inflow_inferior_data_cleanup): Likewise.
(get_inflow_inferior_data): Likewise.
(inflow_inferior_exit): Likewise.
* infrun.c (displaced_step_clear_cleanup): Likewise.
(restore_current_uiout_cleanup): Likewise.
(release_stop_context_cleanup): Likewise.
(do_restore_infcall_suspend_state_cleanup): Likewise.
(do_restore_infcall_control_state_cleanup): Likewise.
(restore_inferior_ptid): Likewise.
* inline-frame.c (block_starting_point_at): Likewise.
* iq2000-tdep.c (iq2000_frame_cache): Likewise.
* jit.c (get_jit_objfile_data): Likewise.
(get_jit_program_space_data): Likewise.
(jit_object_close_impl): Likewise.
(jit_find_objf_with_entry_addr): Likewise.
(jit_breakpoint_deleted): Likewise.
(jit_unwind_reg_set_impl): Likewise.
(jit_unwind_reg_get_impl): Likewise.
(jit_dealloc_cache): Likewise.
(jit_frame_sniffer): Likewise.
(jit_frame_prev_register): Likewise.
(jit_prepend_unwinder): Likewise.
(jit_inferior_exit_hook): Likewise.
(free_objfile_data): Likewise.
* jv-lang.c (jv_per_objfile_free): Likewise.
(get_dynamics_objfile): Likewise.
(get_java_class_symtab): Likewise.
(builtin_java_type): Likewise.
* language.c (language_string_char_type): Likewise.
(language_bool_type): Likewise.
(language_lookup_primitive_type): Likewise.
(language_lookup_primitive_type_as_symbol): Likewise.
* linespec.c (hash_address_entry): Likewise.
(eq_address_entry): Likewise.
(iterate_inline_only): Likewise.
(iterate_name_matcher): Likewise.
(decode_line_2_compare_items): Likewise.
(collect_one_symbol): Likewise.
(compare_symbols): Likewise.
(compare_msymbols): Likewise.
(add_symtabs_to_list): Likewise.
(collect_symbols): Likewise.
(compare_msyms): Likewise.
(add_minsym): Likewise.
(cleanup_linespec_result): Likewise.
* linux-fork.c (inferior_call_waitpid_cleanup): Likewise.
* linux-nat.c (delete_lwp_cleanup): Likewise.
(count_events_callback): Likewise.
(select_event_lwp_callback): Likewise.
(resume_stopped_resumed_lwps): Likewise.
* linux-tdep.c (get_linux_gdbarch_data): Likewise.
(invalidate_linux_cache_inf): Likewise.
(get_linux_inferior_data): Likewise.
(linux_find_memory_regions_thunk): Likewise.
(linux_make_mappings_callback): Likewise.
(linux_corefile_thread_callback): Likewise.
(find_mapping_size): Likewise.
* linux-thread-db.c (find_new_threads_callback): Likewise.
* lm32-tdep.c (lm32_frame_cache): Likewise.
* m2-lang.c (builtin_m2_type): Likewise.
* m32c-tdep.c (m32c_analyze_frame_prologue): Likewise.
* m32r-linux-tdep.c (m32r_linux_sigtramp_frame_cache): Likewise.
(m32r_linux_supply_gregset): Likewise.
(m32r_linux_collect_gregset): Likewise.
* m32r-tdep.c (m32r_frame_unwind_cache): Likewise.
* m68hc11-tdep.c (m68hc11_frame_unwind_cache): Likewise.
* m68k-tdep.c (m68k_frame_cache): Likewise.
* m68kbsd-tdep.c (m68kbsd_supply_fpregset): Likewise.
(m68kbsd_supply_gregset): Likewise.
* m68klinux-tdep.c (m68k_linux_sigtramp_frame_cache): Likewise.
* m88k-tdep.c (m88k_frame_cache): Likewise.
(m88k_supply_gregset): Likewise.
gdb/gdbserver/ChangeLog:
* dll.c (match_dll): Add cast(s).
(unloaded_dll): Likewise.
* linux-low.c (second_thread_of_pid_p): Likewise.
(delete_lwp_callback): Likewise.
(count_events_callback): Likewise.
(select_event_lwp_callback): Likewise.
(linux_set_resume_request): Likewise.
* server.c (accumulate_file_name_length): Likewise.
(emit_dll_description): Likewise.
(handle_qxfer_threads_worker): Likewise.
(visit_actioned_threads): Likewise.
* thread-db.c (any_thread_of): Likewise.
* tracepoint.c (same_process_p): Likewise.
(match_blocktype): Likewise.
(build_traceframe_info_xml): Likewise.
gdb/testsuite/ChangeLog:
* gdb.gdb/selftest.exp (do_steps_and_nexts): Adjust expected
source line.
2015-09-26 02:08:07 +08:00
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vendor = (const char *) xml_find_attribute (attributes, "vendor")->value;
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family = (ULONGEST *) xml_find_attribute (attributes, "family")->value;
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model = (ULONGEST *) xml_find_attribute (attributes, "model")->value;
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stepping = (ULONGEST *) xml_find_attribute (attributes, "stepping")->value;
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btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
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Add some more casts (1/2)
Note: I needed to split this patch in two, otherwise it's too big for
the mailing list.
This patch adds explicit casts to situations where a void pointer is
assigned to a pointer to the "real" type. Building in C++ mode requires
those assignments to use an explicit cast. This includes, for example:
- callback arguments (cleanups, comparison functions, ...)
- data attached to some object (objfile, program space, etc) in the form
of a void pointer
- "user data" passed to some function
This patch comes from the commit "(mostly) auto-generated patch to insert
casts needed for C++", taken from Pedro's C++ branch.
Only files built on x86 with --enable-targets=all are modified, so the
native files for other arches will need to be dealt with separately.
I built-tested this with --enable-targets=all and reg-tested. To my
surprise, a test case (selftest.exp) had to be adjusted.
Here's the ChangeLog entry. Again, this was relatively quick to make
despite the length, thanks to David Malcom's script, although I don't
believe it's very useful information in that particular case...
gdb/ChangeLog:
* aarch64-tdep.c (aarch64_make_prologue_cache): Add cast(s).
(aarch64_make_stub_cache): Likewise.
(value_of_aarch64_user_reg): Likewise.
* ada-lang.c (ada_inferior_data_cleanup): Likewise.
(get_ada_inferior_data): Likewise.
(get_ada_pspace_data): Likewise.
(ada_pspace_data_cleanup): Likewise.
(ada_complete_symbol_matcher): Likewise.
(ada_exc_search_name_matches): Likewise.
* ada-tasks.c (get_ada_tasks_pspace_data): Likewise.
(get_ada_tasks_inferior_data): Likewise.
* addrmap.c (addrmap_mutable_foreach_worker): Likewise.
(splay_obstack_alloc): Likewise.
(splay_obstack_free): Likewise.
* alpha-linux-tdep.c (alpha_linux_supply_gregset): Likewise.
(alpha_linux_collect_gregset): Likewise.
(alpha_linux_supply_fpregset): Likewise.
(alpha_linux_collect_fpregset): Likewise.
* alpha-mdebug-tdep.c (alpha_mdebug_frame_unwind_cache): Likewise.
* alpha-tdep.c (alpha_lds): Likewise.
(alpha_sts): Likewise.
(alpha_sigtramp_frame_unwind_cache): Likewise.
(alpha_heuristic_frame_unwind_cache): Likewise.
(alpha_supply_int_regs): Likewise.
(alpha_fill_int_regs): Likewise.
(alpha_supply_fp_regs): Likewise.
(alpha_fill_fp_regs): Likewise.
* alphanbsd-tdep.c (alphanbsd_supply_fpregset): Likewise.
(alphanbsd_aout_supply_gregset): Likewise.
(alphanbsd_supply_gregset): Likewise.
* amd64-linux-tdep.c (amd64_linux_init_abi): Likewise.
(amd64_x32_linux_init_abi): Likewise.
* amd64-nat.c (amd64_supply_native_gregset): Likewise.
(amd64_collect_native_gregset): Likewise.
* amd64-tdep.c (amd64_frame_cache): Likewise.
(amd64_sigtramp_frame_cache): Likewise.
(amd64_epilogue_frame_cache): Likewise.
(amd64_supply_fxsave): Likewise.
(amd64_supply_xsave): Likewise.
(amd64_collect_fxsave): Likewise.
(amd64_collect_xsave): Likewise.
* amd64-windows-tdep.c (amd64_windows_frame_cache): Likewise.
* amd64obsd-tdep.c (amd64obsd_trapframe_cache): Likewise.
* arm-linux-tdep.c (arm_linux_supply_gregset): Likewise.
(arm_linux_collect_gregset): Likewise.
(arm_linux_supply_nwfpe): Likewise.
(arm_linux_collect_nwfpe): Likewise.
(arm_linux_supply_vfp): Likewise.
(arm_linux_collect_vfp): Likewise.
* arm-tdep.c (arm_find_mapping_symbol): Likewise.
(arm_prologue_unwind_stop_reason): Likewise.
(arm_prologue_this_id): Likewise.
(arm_prologue_prev_register): Likewise.
(arm_exidx_data_free): Likewise.
(arm_find_exidx_entry): Likewise.
(arm_stub_this_id): Likewise.
(arm_m_exception_this_id): Likewise.
(arm_m_exception_prev_register): Likewise.
(arm_normal_frame_base): Likewise.
(gdb_print_insn_arm): Likewise.
(arm_objfile_data_free): Likewise.
(arm_record_special_symbol): Likewise.
(value_of_arm_user_reg): Likewise.
* armbsd-tdep.c (armbsd_supply_fpregset): Likewise.
(armbsd_supply_gregset): Likewise.
* auto-load.c (auto_load_pspace_data_cleanup): Likewise.
(get_auto_load_pspace_data): Likewise.
(hash_loaded_script_entry): Likewise.
(eq_loaded_script_entry): Likewise.
(clear_section_scripts): Likewise.
(collect_matching_scripts): Likewise.
* auxv.c (auxv_inferior_data_cleanup): Likewise.
(get_auxv_inferior_data): Likewise.
* avr-tdep.c (avr_frame_unwind_cache): Likewise.
* ax-general.c (do_free_agent_expr_cleanup): Likewise.
* bfd-target.c (target_bfd_xfer_partial): Likewise.
(target_bfd_xclose): Likewise.
(target_bfd_get_section_table): Likewise.
* bfin-tdep.c (bfin_frame_cache): Likewise.
* block.c (find_block_in_blockvector): Likewise.
(call_site_for_pc): Likewise.
(block_find_non_opaque_type_preferred): Likewise.
* break-catch-sig.c (signal_catchpoint_insert_location): Likewise.
(signal_catchpoint_remove_location): Likewise.
(signal_catchpoint_breakpoint_hit): Likewise.
(signal_catchpoint_print_one): Likewise.
(signal_catchpoint_print_mention): Likewise.
(signal_catchpoint_print_recreate): Likewise.
* break-catch-syscall.c (get_catch_syscall_inferior_data): Likewise.
* breakpoint.c (do_cleanup_counted_command_line): Likewise.
(bp_location_compare_addrs): Likewise.
(get_first_locp_gte_addr): Likewise.
(check_tracepoint_command): Likewise.
(do_map_commands_command): Likewise.
(get_breakpoint_objfile_data): Likewise.
(free_breakpoint_probes): Likewise.
(do_captured_breakpoint_query): Likewise.
(compare_breakpoints): Likewise.
(bp_location_compare): Likewise.
(bpstat_remove_breakpoint_callback): Likewise.
(do_delete_breakpoint_cleanup): Likewise.
* bsd-uthread.c (bsd_uthread_set_supply_uthread): Likewise.
(bsd_uthread_set_collect_uthread): Likewise.
(bsd_uthread_activate): Likewise.
(bsd_uthread_fetch_registers): Likewise.
(bsd_uthread_store_registers): Likewise.
* btrace.c (check_xml_btrace_version): Likewise.
(parse_xml_btrace_block): Likewise.
(parse_xml_btrace_pt_config_cpu): Likewise.
(parse_xml_btrace_pt_raw): Likewise.
(parse_xml_btrace_pt): Likewise.
(parse_xml_btrace_conf_bts): Likewise.
(parse_xml_btrace_conf_pt): Likewise.
(do_btrace_data_cleanup): Likewise.
* c-typeprint.c (find_typedef_for_canonicalize): Likewise.
* charset.c (cleanup_iconv): Likewise.
(do_cleanup_iterator): Likewise.
* cli-out.c (cli_uiout_dtor): Likewise.
(cli_table_begin): Likewise.
(cli_table_body): Likewise.
(cli_table_end): Likewise.
(cli_table_header): Likewise.
(cli_begin): Likewise.
(cli_end): Likewise.
(cli_field_int): Likewise.
(cli_field_skip): Likewise.
(cli_field_string): Likewise.
(cli_field_fmt): Likewise.
(cli_spaces): Likewise.
(cli_text): Likewise.
(cli_message): Likewise.
(cli_wrap_hint): Likewise.
(cli_flush): Likewise.
(cli_redirect): Likewise.
(out_field_fmt): Likewise.
(field_separator): Likewise.
(cli_out_set_stream): Likewise.
* cli/cli-cmds.c (compare_symtabs): Likewise.
* cli/cli-dump.c (call_dump_func): Likewise.
(restore_section_callback): Likewise.
* cli/cli-script.c (clear_hook_in_cleanup): Likewise.
(do_restore_user_call_depth): Likewise.
(do_free_command_lines_cleanup): Likewise.
* coff-pe-read.c (get_section_vmas): Likewise.
(pe_as16): Likewise.
(pe_as32): Likewise.
* coffread.c (coff_symfile_read): Likewise.
* common/agent.c (agent_look_up_symbols): Likewise.
* common/filestuff.c (do_close_cleanup): Likewise.
* common/format.c (free_format_pieces_cleanup): Likewise.
* common/vec.c (vec_o_reserve): Likewise.
* compile/compile-c-support.c (print_one_macro): Likewise.
* compile/compile-c-symbols.c (hash_symbol_error): Likewise.
(eq_symbol_error): Likewise.
(del_symbol_error): Likewise.
(error_symbol_once): Likewise.
(gcc_convert_symbol): Likewise.
(gcc_symbol_address): Likewise.
(hash_symname): Likewise.
(eq_symname): Likewise.
* compile/compile-c-types.c (hash_type_map_instance): Likewise.
(eq_type_map_instance): Likewise.
(insert_type): Likewise.
(convert_type): Likewise.
* compile/compile-object-load.c (munmap_listp_free_cleanup): Likewise.
(setup_sections): Likewise.
(link_hash_table_free): Likewise.
(copy_sections): Likewise.
* compile/compile-object-run.c (do_module_cleanup): Likewise.
* compile/compile.c (compile_print_value): Likewise.
(do_rmdir): Likewise.
(cleanup_compile_instance): Likewise.
(cleanup_unlink_file): Likewise.
* completer.c (free_completion_tracker): Likewise.
* corelow.c (add_to_spuid_list): Likewise.
* cp-namespace.c (reset_directive_searched): Likewise.
* cp-support.c (reset_directive_searched): Likewise.
* cris-tdep.c (cris_sigtramp_frame_unwind_cache): Likewise.
(cris_frame_unwind_cache): Likewise.
* d-lang.c (builtin_d_type): Likewise.
* d-namespace.c (reset_directive_searched): Likewise.
* dbxread.c (dbx_free_symfile_info): Likewise.
(do_free_bincl_list_cleanup): Likewise.
* disasm.c (hash_dis_line_entry): Likewise.
(eq_dis_line_entry): Likewise.
(dis_asm_print_address): Likewise.
(fprintf_disasm): Likewise.
(do_ui_file_delete): Likewise.
* doublest.c (convert_floatformat_to_doublest): Likewise.
* dummy-frame.c (pop_dummy_frame_bpt): Likewise.
(dummy_frame_prev_register): Likewise.
(dummy_frame_this_id): Likewise.
* dwarf2-frame-tailcall.c (cache_hash): Likewise.
(cache_eq): Likewise.
(cache_find): Likewise.
(tailcall_frame_this_id): Likewise.
(dwarf2_tailcall_prev_register_first): Likewise.
(tailcall_frame_prev_register): Likewise.
(tailcall_frame_dealloc_cache): Likewise.
(tailcall_frame_prev_arch): Likewise.
* dwarf2-frame.c (dwarf2_frame_state_free): Likewise.
(dwarf2_frame_set_init_reg): Likewise.
(dwarf2_frame_init_reg): Likewise.
(dwarf2_frame_set_signal_frame_p): Likewise.
(dwarf2_frame_signal_frame_p): Likewise.
(dwarf2_frame_set_adjust_regnum): Likewise.
(dwarf2_frame_adjust_regnum): Likewise.
(clear_pointer_cleanup): Likewise.
(dwarf2_frame_cache): Likewise.
(find_cie): Likewise.
(dwarf2_frame_find_fde): Likewise.
* dwarf2expr.c (dwarf_expr_address_type): Likewise.
(free_dwarf_expr_context_cleanup): Likewise.
* dwarf2loc.c (locexpr_find_frame_base_location): Likewise.
(locexpr_get_frame_base): Likewise.
(loclist_find_frame_base_location): Likewise.
(loclist_get_frame_base): Likewise.
(dwarf_expr_dwarf_call): Likewise.
(dwarf_expr_get_base_type): Likewise.
(dwarf_expr_push_dwarf_reg_entry_value): Likewise.
(dwarf_expr_get_obj_addr): Likewise.
(entry_data_value_coerce_ref): Likewise.
(entry_data_value_copy_closure): Likewise.
(entry_data_value_free_closure): Likewise.
(get_frame_address_in_block_wrapper): Likewise.
(dwarf2_evaluate_property): Likewise.
(dwarf2_compile_property_to_c): Likewise.
(needs_frame_read_addr_from_reg): Likewise.
(needs_frame_get_reg_value): Likewise.
(needs_frame_frame_base): Likewise.
(needs_frame_frame_cfa): Likewise.
(needs_frame_tls_address): Likewise.
(needs_frame_dwarf_call): Likewise.
(needs_dwarf_reg_entry_value): Likewise.
(get_ax_pc): Likewise.
(locexpr_read_variable): Likewise.
(locexpr_read_variable_at_entry): Likewise.
(locexpr_read_needs_frame): Likewise.
(locexpr_describe_location): Likewise.
(locexpr_tracepoint_var_ref): Likewise.
(locexpr_generate_c_location): Likewise.
(loclist_read_variable): Likewise.
(loclist_read_variable_at_entry): Likewise.
(loclist_describe_location): Likewise.
(loclist_tracepoint_var_ref): Likewise.
(loclist_generate_c_location): Likewise.
* dwarf2read.c (line_header_hash_voidp): Likewise.
(line_header_eq_voidp): Likewise.
(dwarf2_has_info): Likewise.
(dwarf2_get_section_info): Likewise.
(locate_dwz_sections): Likewise.
(hash_file_name_entry): Likewise.
(eq_file_name_entry): Likewise.
(delete_file_name_entry): Likewise.
(dw2_setup): Likewise.
(dw2_get_file_names_reader): Likewise.
(dw2_find_pc_sect_compunit_symtab): Likewise.
(hash_signatured_type): Likewise.
(eq_signatured_type): Likewise.
(add_signatured_type_cu_to_table): Likewise.
(create_debug_types_hash_table): Likewise.
(lookup_dwo_signatured_type): Likewise.
(lookup_dwp_signatured_type): Likewise.
(lookup_signatured_type): Likewise.
(hash_type_unit_group): Likewise.
(eq_type_unit_group): Likewise.
(get_type_unit_group): Likewise.
(process_psymtab_comp_unit_reader): Likewise.
(sort_tu_by_abbrev_offset): Likewise.
(process_skeletonless_type_unit): Likewise.
(psymtabs_addrmap_cleanup): Likewise.
(dwarf2_read_symtab): Likewise.
(psymtab_to_symtab_1): Likewise.
(die_hash): Likewise.
(die_eq): Likewise.
(load_full_comp_unit_reader): Likewise.
(reset_die_in_process): Likewise.
(free_cu_line_header): Likewise.
(handle_DW_AT_stmt_list): Likewise.
(hash_dwo_file): Likewise.
(eq_dwo_file): Likewise.
(hash_dwo_unit): Likewise.
(eq_dwo_unit): Likewise.
(create_dwo_cu_reader): Likewise.
(create_dwo_unit_in_dwp_v1): Likewise.
(create_dwo_unit_in_dwp_v2): Likewise.
(lookup_dwo_unit_in_dwp): Likewise.
(dwarf2_locate_dwo_sections): Likewise.
(dwarf2_locate_common_dwp_sections): Likewise.
(dwarf2_locate_v2_dwp_sections): Likewise.
(hash_dwp_loaded_cutus): Likewise.
(eq_dwp_loaded_cutus): Likewise.
(lookup_dwo_cutu): Likewise.
(abbrev_table_free_cleanup): Likewise.
(dwarf2_free_abbrev_table): Likewise.
(find_partial_die_in_comp_unit): Likewise.
(free_line_header_voidp): Likewise.
(follow_die_offset): Likewise.
(follow_die_sig_1): Likewise.
(free_heap_comp_unit): Likewise.
(free_stack_comp_unit): Likewise.
(dwarf2_free_objfile): Likewise.
(per_cu_offset_and_type_hash): Likewise.
(per_cu_offset_and_type_eq): Likewise.
(get_die_type_at_offset): Likewise.
(partial_die_hash): Likewise.
(partial_die_eq): Likewise.
(dwarf2_per_objfile_free): Likewise.
(hash_strtab_entry): Likewise.
(eq_strtab_entry): Likewise.
(add_string): Likewise.
(hash_symtab_entry): Likewise.
(eq_symtab_entry): Likewise.
(delete_symtab_entry): Likewise.
(cleanup_mapped_symtab): Likewise.
(add_indices_to_cpool): Likewise.
(hash_psymtab_cu_index): Likewise.
(eq_psymtab_cu_index): Likewise.
(add_address_entry_worker): Likewise.
(unlink_if_set): Likewise.
(write_one_signatured_type): Likewise.
(save_gdb_index_command): Likewise.
* elfread.c (elf_symtab_read): Likewise.
(elf_gnu_ifunc_cache_hash): Likewise.
(elf_gnu_ifunc_cache_eq): Likewise.
(elf_gnu_ifunc_record_cache): Likewise.
(elf_gnu_ifunc_resolve_by_cache): Likewise.
(elf_get_probes): Likewise.
(probe_key_free): Likewise.
* f-lang.c (builtin_f_type): Likewise.
* frame-base.c (frame_base_append_sniffer): Likewise.
(frame_base_set_default): Likewise.
(frame_base_find_by_frame): Likewise.
* frame-unwind.c (frame_unwind_prepend_unwinder): Likewise.
(frame_unwind_append_unwinder): Likewise.
(frame_unwind_find_by_frame): Likewise.
* frame.c (frame_addr_hash): Likewise.
(frame_addr_hash_eq): Likewise.
(frame_stash_find): Likewise.
(do_frame_register_read): Likewise.
(unwind_to_current_frame): Likewise.
(frame_cleanup_after_sniffer): Likewise.
* frv-linux-tdep.c (frv_linux_sigtramp_frame_cache): Likewise.
* frv-tdep.c (frv_frame_unwind_cache): Likewise.
* ft32-tdep.c (ft32_frame_cache): Likewise.
* gcore.c (do_bfd_delete_cleanup): Likewise.
(gcore_create_callback): Likewise.
* gdb_bfd.c (hash_bfd): Likewise.
(eq_bfd): Likewise.
(gdb_bfd_open): Likewise.
(free_one_bfd_section): Likewise.
(gdb_bfd_ref): Likewise.
(gdb_bfd_unref): Likewise.
(get_section_descriptor): Likewise.
(gdb_bfd_map_section): Likewise.
(gdb_bfd_crc): Likewise.
(gdb_bfd_mark_parent): Likewise.
(gdb_bfd_record_inclusion): Likewise.
(gdb_bfd_requires_relocations): Likewise.
(print_one_bfd): Likewise.
* gdbtypes.c (type_pair_hash): Likewise.
(type_pair_eq): Likewise.
(builtin_type): Likewise.
(objfile_type): Likewise.
* gnu-v3-abi.c (vtable_ptrdiff_type): Likewise.
(vtable_address_point_offset): Likewise.
(gnuv3_get_vtable): Likewise.
(hash_value_and_voffset): Likewise.
(eq_value_and_voffset): Likewise.
(compare_value_and_voffset): Likewise.
(compute_vtable_size): Likewise.
(gnuv3_get_typeid_type): Likewise.
* go-lang.c (builtin_go_type): Likewise.
* guile/scm-block.c (bkscm_hash_block_smob): Likewise.
(bkscm_eq_block_smob): Likewise.
(bkscm_objfile_block_map): Likewise.
(bkscm_del_objfile_blocks): Likewise.
* guile/scm-breakpoint.c (bpscm_build_bp_list): Likewise.
* guile/scm-disasm.c (gdbscm_disasm_read_memory_worker): Likewise.
(gdbscm_disasm_print_address): Likewise.
* guile/scm-frame.c (frscm_hash_frame_smob): Likewise.
(frscm_eq_frame_smob): Likewise.
(frscm_inferior_frame_map): Likewise.
(frscm_del_inferior_frames): Likewise.
* guile/scm-gsmob.c (gdbscm_add_objfile_ref): Likewise.
* guile/scm-objfile.c (ofscm_handle_objfile_deleted): Likewise.
(ofscm_objfile_smob_from_objfile): Likewise.
* guile/scm-ports.c (ioscm_write): Likewise.
(ioscm_file_port_delete): Likewise.
(ioscm_file_port_rewind): Likewise.
(ioscm_file_port_put): Likewise.
(ioscm_file_port_write): Likewise.
* guile/scm-progspace.c (psscm_handle_pspace_deleted): Likewise.
(psscm_pspace_smob_from_pspace): Likewise.
* guile/scm-safe-call.c (scscm_recording_pre_unwind_handler): Likewise.
(scscm_recording_unwind_handler): Likewise.
(gdbscm_with_catch): Likewise.
(scscm_call_0_body): Likewise.
(scscm_call_1_body): Likewise.
(scscm_call_2_body): Likewise.
(scscm_call_3_body): Likewise.
(scscm_call_4_body): Likewise.
(scscm_apply_1_body): Likewise.
(scscm_eval_scheme_string): Likewise.
(gdbscm_safe_eval_string): Likewise.
(scscm_source_scheme_script): Likewise.
(gdbscm_safe_source_script): Likewise.
* guile/scm-string.c (gdbscm_call_scm_to_stringn): Likewise.
(gdbscm_call_scm_from_stringn): Likewise.
* guile/scm-symbol.c (syscm_hash_symbol_smob): Likewise.
(syscm_eq_symbol_smob): Likewise.
(syscm_get_symbol_map): Likewise.
(syscm_del_objfile_symbols): Likewise.
* guile/scm-symtab.c (stscm_hash_symtab_smob): Likewise.
(stscm_eq_symtab_smob): Likewise.
(stscm_objfile_symtab_map): Likewise.
(stscm_del_objfile_symtabs): Likewise.
* guile/scm-type.c (tyscm_hash_type_smob): Likewise.
(tyscm_eq_type_smob): Likewise.
(tyscm_type_map): Likewise.
(tyscm_copy_type_recursive): Likewise.
(save_objfile_types): Likewise.
* guile/scm-utils.c (extract_arg): Likewise.
* h8300-tdep.c (h8300_frame_cache): Likewise.
* hppa-linux-tdep.c (hppa_linux_sigtramp_frame_unwind_cache): Likewise.
* hppa-tdep.c (compare_unwind_entries): Likewise.
(find_unwind_entry): Likewise.
(hppa_frame_cache): Likewise.
(hppa_stub_frame_unwind_cache): Likewise.
* hppanbsd-tdep.c (hppanbsd_supply_gregset): Likewise.
* hppaobsd-tdep.c (hppaobsd_supply_gregset): Likewise.
(hppaobsd_supply_fpregset): Likewise.
* i386-cygwin-tdep.c (core_process_module_section): Likewise.
* i386-linux-tdep.c (i386_linux_init_abi): Likewise.
* i386-tdep.c (i386_frame_cache): Likewise.
(i386_epilogue_frame_cache): Likewise.
(i386_sigtramp_frame_cache): Likewise.
(i386_supply_gregset): Likewise.
(i386_collect_gregset): Likewise.
(i386_gdbarch_init): Likewise.
* i386obsd-tdep.c (i386obsd_aout_supply_regset): Likewise.
(i386obsd_trapframe_cache): Likewise.
* i387-tdep.c (i387_supply_fsave): Likewise.
(i387_collect_fsave): Likewise.
(i387_supply_fxsave): Likewise.
(i387_collect_fxsave): Likewise.
(i387_supply_xsave): Likewise.
(i387_collect_xsave): Likewise.
* ia64-tdep.c (ia64_frame_cache): Likewise.
(ia64_sigtramp_frame_cache): Likewise.
* infcmd.c (attach_command_continuation): Likewise.
(attach_command_continuation_free_args): Likewise.
* inferior.c (restore_inferior): Likewise.
(delete_thread_of_inferior): Likewise.
* inflow.c (inflow_inferior_data_cleanup): Likewise.
(get_inflow_inferior_data): Likewise.
(inflow_inferior_exit): Likewise.
* infrun.c (displaced_step_clear_cleanup): Likewise.
(restore_current_uiout_cleanup): Likewise.
(release_stop_context_cleanup): Likewise.
(do_restore_infcall_suspend_state_cleanup): Likewise.
(do_restore_infcall_control_state_cleanup): Likewise.
(restore_inferior_ptid): Likewise.
* inline-frame.c (block_starting_point_at): Likewise.
* iq2000-tdep.c (iq2000_frame_cache): Likewise.
* jit.c (get_jit_objfile_data): Likewise.
(get_jit_program_space_data): Likewise.
(jit_object_close_impl): Likewise.
(jit_find_objf_with_entry_addr): Likewise.
(jit_breakpoint_deleted): Likewise.
(jit_unwind_reg_set_impl): Likewise.
(jit_unwind_reg_get_impl): Likewise.
(jit_dealloc_cache): Likewise.
(jit_frame_sniffer): Likewise.
(jit_frame_prev_register): Likewise.
(jit_prepend_unwinder): Likewise.
(jit_inferior_exit_hook): Likewise.
(free_objfile_data): Likewise.
* jv-lang.c (jv_per_objfile_free): Likewise.
(get_dynamics_objfile): Likewise.
(get_java_class_symtab): Likewise.
(builtin_java_type): Likewise.
* language.c (language_string_char_type): Likewise.
(language_bool_type): Likewise.
(language_lookup_primitive_type): Likewise.
(language_lookup_primitive_type_as_symbol): Likewise.
* linespec.c (hash_address_entry): Likewise.
(eq_address_entry): Likewise.
(iterate_inline_only): Likewise.
(iterate_name_matcher): Likewise.
(decode_line_2_compare_items): Likewise.
(collect_one_symbol): Likewise.
(compare_symbols): Likewise.
(compare_msymbols): Likewise.
(add_symtabs_to_list): Likewise.
(collect_symbols): Likewise.
(compare_msyms): Likewise.
(add_minsym): Likewise.
(cleanup_linespec_result): Likewise.
* linux-fork.c (inferior_call_waitpid_cleanup): Likewise.
* linux-nat.c (delete_lwp_cleanup): Likewise.
(count_events_callback): Likewise.
(select_event_lwp_callback): Likewise.
(resume_stopped_resumed_lwps): Likewise.
* linux-tdep.c (get_linux_gdbarch_data): Likewise.
(invalidate_linux_cache_inf): Likewise.
(get_linux_inferior_data): Likewise.
(linux_find_memory_regions_thunk): Likewise.
(linux_make_mappings_callback): Likewise.
(linux_corefile_thread_callback): Likewise.
(find_mapping_size): Likewise.
* linux-thread-db.c (find_new_threads_callback): Likewise.
* lm32-tdep.c (lm32_frame_cache): Likewise.
* m2-lang.c (builtin_m2_type): Likewise.
* m32c-tdep.c (m32c_analyze_frame_prologue): Likewise.
* m32r-linux-tdep.c (m32r_linux_sigtramp_frame_cache): Likewise.
(m32r_linux_supply_gregset): Likewise.
(m32r_linux_collect_gregset): Likewise.
* m32r-tdep.c (m32r_frame_unwind_cache): Likewise.
* m68hc11-tdep.c (m68hc11_frame_unwind_cache): Likewise.
* m68k-tdep.c (m68k_frame_cache): Likewise.
* m68kbsd-tdep.c (m68kbsd_supply_fpregset): Likewise.
(m68kbsd_supply_gregset): Likewise.
* m68klinux-tdep.c (m68k_linux_sigtramp_frame_cache): Likewise.
* m88k-tdep.c (m88k_frame_cache): Likewise.
(m88k_supply_gregset): Likewise.
gdb/gdbserver/ChangeLog:
* dll.c (match_dll): Add cast(s).
(unloaded_dll): Likewise.
* linux-low.c (second_thread_of_pid_p): Likewise.
(delete_lwp_callback): Likewise.
(count_events_callback): Likewise.
(select_event_lwp_callback): Likewise.
(linux_set_resume_request): Likewise.
* server.c (accumulate_file_name_length): Likewise.
(emit_dll_description): Likewise.
(handle_qxfer_threads_worker): Likewise.
(visit_actioned_threads): Likewise.
* thread-db.c (any_thread_of): Likewise.
* tracepoint.c (same_process_p): Likewise.
(match_blocktype): Likewise.
(build_traceframe_info_xml): Likewise.
gdb/testsuite/ChangeLog:
* gdb.gdb/selftest.exp (do_steps_and_nexts): Adjust expected
source line.
2015-09-26 02:08:07 +08:00
|
|
|
btrace = (struct btrace_data *) user_data;
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
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if (strcmp (vendor, "GenuineIntel") == 0)
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btrace->variant.pt.config.cpu.vendor = CV_INTEL;
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btrace->variant.pt.config.cpu.family = *family;
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btrace->variant.pt.config.cpu.model = *model;
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btrace->variant.pt.config.cpu.stepping = *stepping;
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}
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/* Parse a btrace pt "raw" xml record. */
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static void
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parse_xml_btrace_pt_raw (struct gdb_xml_parser *parser,
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const struct gdb_xml_element *element,
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void *user_data, const char *body_text)
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{
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struct btrace_data *btrace;
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Add some more casts (1/2)
Note: I needed to split this patch in two, otherwise it's too big for
the mailing list.
This patch adds explicit casts to situations where a void pointer is
assigned to a pointer to the "real" type. Building in C++ mode requires
those assignments to use an explicit cast. This includes, for example:
- callback arguments (cleanups, comparison functions, ...)
- data attached to some object (objfile, program space, etc) in the form
of a void pointer
- "user data" passed to some function
This patch comes from the commit "(mostly) auto-generated patch to insert
casts needed for C++", taken from Pedro's C++ branch.
Only files built on x86 with --enable-targets=all are modified, so the
native files for other arches will need to be dealt with separately.
I built-tested this with --enable-targets=all and reg-tested. To my
surprise, a test case (selftest.exp) had to be adjusted.
Here's the ChangeLog entry. Again, this was relatively quick to make
despite the length, thanks to David Malcom's script, although I don't
believe it's very useful information in that particular case...
gdb/ChangeLog:
* aarch64-tdep.c (aarch64_make_prologue_cache): Add cast(s).
(aarch64_make_stub_cache): Likewise.
(value_of_aarch64_user_reg): Likewise.
* ada-lang.c (ada_inferior_data_cleanup): Likewise.
(get_ada_inferior_data): Likewise.
(get_ada_pspace_data): Likewise.
(ada_pspace_data_cleanup): Likewise.
(ada_complete_symbol_matcher): Likewise.
(ada_exc_search_name_matches): Likewise.
* ada-tasks.c (get_ada_tasks_pspace_data): Likewise.
(get_ada_tasks_inferior_data): Likewise.
* addrmap.c (addrmap_mutable_foreach_worker): Likewise.
(splay_obstack_alloc): Likewise.
(splay_obstack_free): Likewise.
* alpha-linux-tdep.c (alpha_linux_supply_gregset): Likewise.
(alpha_linux_collect_gregset): Likewise.
(alpha_linux_supply_fpregset): Likewise.
(alpha_linux_collect_fpregset): Likewise.
* alpha-mdebug-tdep.c (alpha_mdebug_frame_unwind_cache): Likewise.
* alpha-tdep.c (alpha_lds): Likewise.
(alpha_sts): Likewise.
(alpha_sigtramp_frame_unwind_cache): Likewise.
(alpha_heuristic_frame_unwind_cache): Likewise.
(alpha_supply_int_regs): Likewise.
(alpha_fill_int_regs): Likewise.
(alpha_supply_fp_regs): Likewise.
(alpha_fill_fp_regs): Likewise.
* alphanbsd-tdep.c (alphanbsd_supply_fpregset): Likewise.
(alphanbsd_aout_supply_gregset): Likewise.
(alphanbsd_supply_gregset): Likewise.
* amd64-linux-tdep.c (amd64_linux_init_abi): Likewise.
(amd64_x32_linux_init_abi): Likewise.
* amd64-nat.c (amd64_supply_native_gregset): Likewise.
(amd64_collect_native_gregset): Likewise.
* amd64-tdep.c (amd64_frame_cache): Likewise.
(amd64_sigtramp_frame_cache): Likewise.
(amd64_epilogue_frame_cache): Likewise.
(amd64_supply_fxsave): Likewise.
(amd64_supply_xsave): Likewise.
(amd64_collect_fxsave): Likewise.
(amd64_collect_xsave): Likewise.
* amd64-windows-tdep.c (amd64_windows_frame_cache): Likewise.
* amd64obsd-tdep.c (amd64obsd_trapframe_cache): Likewise.
* arm-linux-tdep.c (arm_linux_supply_gregset): Likewise.
(arm_linux_collect_gregset): Likewise.
(arm_linux_supply_nwfpe): Likewise.
(arm_linux_collect_nwfpe): Likewise.
(arm_linux_supply_vfp): Likewise.
(arm_linux_collect_vfp): Likewise.
* arm-tdep.c (arm_find_mapping_symbol): Likewise.
(arm_prologue_unwind_stop_reason): Likewise.
(arm_prologue_this_id): Likewise.
(arm_prologue_prev_register): Likewise.
(arm_exidx_data_free): Likewise.
(arm_find_exidx_entry): Likewise.
(arm_stub_this_id): Likewise.
(arm_m_exception_this_id): Likewise.
(arm_m_exception_prev_register): Likewise.
(arm_normal_frame_base): Likewise.
(gdb_print_insn_arm): Likewise.
(arm_objfile_data_free): Likewise.
(arm_record_special_symbol): Likewise.
(value_of_arm_user_reg): Likewise.
* armbsd-tdep.c (armbsd_supply_fpregset): Likewise.
(armbsd_supply_gregset): Likewise.
* auto-load.c (auto_load_pspace_data_cleanup): Likewise.
(get_auto_load_pspace_data): Likewise.
(hash_loaded_script_entry): Likewise.
(eq_loaded_script_entry): Likewise.
(clear_section_scripts): Likewise.
(collect_matching_scripts): Likewise.
* auxv.c (auxv_inferior_data_cleanup): Likewise.
(get_auxv_inferior_data): Likewise.
* avr-tdep.c (avr_frame_unwind_cache): Likewise.
* ax-general.c (do_free_agent_expr_cleanup): Likewise.
* bfd-target.c (target_bfd_xfer_partial): Likewise.
(target_bfd_xclose): Likewise.
(target_bfd_get_section_table): Likewise.
* bfin-tdep.c (bfin_frame_cache): Likewise.
* block.c (find_block_in_blockvector): Likewise.
(call_site_for_pc): Likewise.
(block_find_non_opaque_type_preferred): Likewise.
* break-catch-sig.c (signal_catchpoint_insert_location): Likewise.
(signal_catchpoint_remove_location): Likewise.
(signal_catchpoint_breakpoint_hit): Likewise.
(signal_catchpoint_print_one): Likewise.
(signal_catchpoint_print_mention): Likewise.
(signal_catchpoint_print_recreate): Likewise.
* break-catch-syscall.c (get_catch_syscall_inferior_data): Likewise.
* breakpoint.c (do_cleanup_counted_command_line): Likewise.
(bp_location_compare_addrs): Likewise.
(get_first_locp_gte_addr): Likewise.
(check_tracepoint_command): Likewise.
(do_map_commands_command): Likewise.
(get_breakpoint_objfile_data): Likewise.
(free_breakpoint_probes): Likewise.
(do_captured_breakpoint_query): Likewise.
(compare_breakpoints): Likewise.
(bp_location_compare): Likewise.
(bpstat_remove_breakpoint_callback): Likewise.
(do_delete_breakpoint_cleanup): Likewise.
* bsd-uthread.c (bsd_uthread_set_supply_uthread): Likewise.
(bsd_uthread_set_collect_uthread): Likewise.
(bsd_uthread_activate): Likewise.
(bsd_uthread_fetch_registers): Likewise.
(bsd_uthread_store_registers): Likewise.
* btrace.c (check_xml_btrace_version): Likewise.
(parse_xml_btrace_block): Likewise.
(parse_xml_btrace_pt_config_cpu): Likewise.
(parse_xml_btrace_pt_raw): Likewise.
(parse_xml_btrace_pt): Likewise.
(parse_xml_btrace_conf_bts): Likewise.
(parse_xml_btrace_conf_pt): Likewise.
(do_btrace_data_cleanup): Likewise.
* c-typeprint.c (find_typedef_for_canonicalize): Likewise.
* charset.c (cleanup_iconv): Likewise.
(do_cleanup_iterator): Likewise.
* cli-out.c (cli_uiout_dtor): Likewise.
(cli_table_begin): Likewise.
(cli_table_body): Likewise.
(cli_table_end): Likewise.
(cli_table_header): Likewise.
(cli_begin): Likewise.
(cli_end): Likewise.
(cli_field_int): Likewise.
(cli_field_skip): Likewise.
(cli_field_string): Likewise.
(cli_field_fmt): Likewise.
(cli_spaces): Likewise.
(cli_text): Likewise.
(cli_message): Likewise.
(cli_wrap_hint): Likewise.
(cli_flush): Likewise.
(cli_redirect): Likewise.
(out_field_fmt): Likewise.
(field_separator): Likewise.
(cli_out_set_stream): Likewise.
* cli/cli-cmds.c (compare_symtabs): Likewise.
* cli/cli-dump.c (call_dump_func): Likewise.
(restore_section_callback): Likewise.
* cli/cli-script.c (clear_hook_in_cleanup): Likewise.
(do_restore_user_call_depth): Likewise.
(do_free_command_lines_cleanup): Likewise.
* coff-pe-read.c (get_section_vmas): Likewise.
(pe_as16): Likewise.
(pe_as32): Likewise.
* coffread.c (coff_symfile_read): Likewise.
* common/agent.c (agent_look_up_symbols): Likewise.
* common/filestuff.c (do_close_cleanup): Likewise.
* common/format.c (free_format_pieces_cleanup): Likewise.
* common/vec.c (vec_o_reserve): Likewise.
* compile/compile-c-support.c (print_one_macro): Likewise.
* compile/compile-c-symbols.c (hash_symbol_error): Likewise.
(eq_symbol_error): Likewise.
(del_symbol_error): Likewise.
(error_symbol_once): Likewise.
(gcc_convert_symbol): Likewise.
(gcc_symbol_address): Likewise.
(hash_symname): Likewise.
(eq_symname): Likewise.
* compile/compile-c-types.c (hash_type_map_instance): Likewise.
(eq_type_map_instance): Likewise.
(insert_type): Likewise.
(convert_type): Likewise.
* compile/compile-object-load.c (munmap_listp_free_cleanup): Likewise.
(setup_sections): Likewise.
(link_hash_table_free): Likewise.
(copy_sections): Likewise.
* compile/compile-object-run.c (do_module_cleanup): Likewise.
* compile/compile.c (compile_print_value): Likewise.
(do_rmdir): Likewise.
(cleanup_compile_instance): Likewise.
(cleanup_unlink_file): Likewise.
* completer.c (free_completion_tracker): Likewise.
* corelow.c (add_to_spuid_list): Likewise.
* cp-namespace.c (reset_directive_searched): Likewise.
* cp-support.c (reset_directive_searched): Likewise.
* cris-tdep.c (cris_sigtramp_frame_unwind_cache): Likewise.
(cris_frame_unwind_cache): Likewise.
* d-lang.c (builtin_d_type): Likewise.
* d-namespace.c (reset_directive_searched): Likewise.
* dbxread.c (dbx_free_symfile_info): Likewise.
(do_free_bincl_list_cleanup): Likewise.
* disasm.c (hash_dis_line_entry): Likewise.
(eq_dis_line_entry): Likewise.
(dis_asm_print_address): Likewise.
(fprintf_disasm): Likewise.
(do_ui_file_delete): Likewise.
* doublest.c (convert_floatformat_to_doublest): Likewise.
* dummy-frame.c (pop_dummy_frame_bpt): Likewise.
(dummy_frame_prev_register): Likewise.
(dummy_frame_this_id): Likewise.
* dwarf2-frame-tailcall.c (cache_hash): Likewise.
(cache_eq): Likewise.
(cache_find): Likewise.
(tailcall_frame_this_id): Likewise.
(dwarf2_tailcall_prev_register_first): Likewise.
(tailcall_frame_prev_register): Likewise.
(tailcall_frame_dealloc_cache): Likewise.
(tailcall_frame_prev_arch): Likewise.
* dwarf2-frame.c (dwarf2_frame_state_free): Likewise.
(dwarf2_frame_set_init_reg): Likewise.
(dwarf2_frame_init_reg): Likewise.
(dwarf2_frame_set_signal_frame_p): Likewise.
(dwarf2_frame_signal_frame_p): Likewise.
(dwarf2_frame_set_adjust_regnum): Likewise.
(dwarf2_frame_adjust_regnum): Likewise.
(clear_pointer_cleanup): Likewise.
(dwarf2_frame_cache): Likewise.
(find_cie): Likewise.
(dwarf2_frame_find_fde): Likewise.
* dwarf2expr.c (dwarf_expr_address_type): Likewise.
(free_dwarf_expr_context_cleanup): Likewise.
* dwarf2loc.c (locexpr_find_frame_base_location): Likewise.
(locexpr_get_frame_base): Likewise.
(loclist_find_frame_base_location): Likewise.
(loclist_get_frame_base): Likewise.
(dwarf_expr_dwarf_call): Likewise.
(dwarf_expr_get_base_type): Likewise.
(dwarf_expr_push_dwarf_reg_entry_value): Likewise.
(dwarf_expr_get_obj_addr): Likewise.
(entry_data_value_coerce_ref): Likewise.
(entry_data_value_copy_closure): Likewise.
(entry_data_value_free_closure): Likewise.
(get_frame_address_in_block_wrapper): Likewise.
(dwarf2_evaluate_property): Likewise.
(dwarf2_compile_property_to_c): Likewise.
(needs_frame_read_addr_from_reg): Likewise.
(needs_frame_get_reg_value): Likewise.
(needs_frame_frame_base): Likewise.
(needs_frame_frame_cfa): Likewise.
(needs_frame_tls_address): Likewise.
(needs_frame_dwarf_call): Likewise.
(needs_dwarf_reg_entry_value): Likewise.
(get_ax_pc): Likewise.
(locexpr_read_variable): Likewise.
(locexpr_read_variable_at_entry): Likewise.
(locexpr_read_needs_frame): Likewise.
(locexpr_describe_location): Likewise.
(locexpr_tracepoint_var_ref): Likewise.
(locexpr_generate_c_location): Likewise.
(loclist_read_variable): Likewise.
(loclist_read_variable_at_entry): Likewise.
(loclist_describe_location): Likewise.
(loclist_tracepoint_var_ref): Likewise.
(loclist_generate_c_location): Likewise.
* dwarf2read.c (line_header_hash_voidp): Likewise.
(line_header_eq_voidp): Likewise.
(dwarf2_has_info): Likewise.
(dwarf2_get_section_info): Likewise.
(locate_dwz_sections): Likewise.
(hash_file_name_entry): Likewise.
(eq_file_name_entry): Likewise.
(delete_file_name_entry): Likewise.
(dw2_setup): Likewise.
(dw2_get_file_names_reader): Likewise.
(dw2_find_pc_sect_compunit_symtab): Likewise.
(hash_signatured_type): Likewise.
(eq_signatured_type): Likewise.
(add_signatured_type_cu_to_table): Likewise.
(create_debug_types_hash_table): Likewise.
(lookup_dwo_signatured_type): Likewise.
(lookup_dwp_signatured_type): Likewise.
(lookup_signatured_type): Likewise.
(hash_type_unit_group): Likewise.
(eq_type_unit_group): Likewise.
(get_type_unit_group): Likewise.
(process_psymtab_comp_unit_reader): Likewise.
(sort_tu_by_abbrev_offset): Likewise.
(process_skeletonless_type_unit): Likewise.
(psymtabs_addrmap_cleanup): Likewise.
(dwarf2_read_symtab): Likewise.
(psymtab_to_symtab_1): Likewise.
(die_hash): Likewise.
(die_eq): Likewise.
(load_full_comp_unit_reader): Likewise.
(reset_die_in_process): Likewise.
(free_cu_line_header): Likewise.
(handle_DW_AT_stmt_list): Likewise.
(hash_dwo_file): Likewise.
(eq_dwo_file): Likewise.
(hash_dwo_unit): Likewise.
(eq_dwo_unit): Likewise.
(create_dwo_cu_reader): Likewise.
(create_dwo_unit_in_dwp_v1): Likewise.
(create_dwo_unit_in_dwp_v2): Likewise.
(lookup_dwo_unit_in_dwp): Likewise.
(dwarf2_locate_dwo_sections): Likewise.
(dwarf2_locate_common_dwp_sections): Likewise.
(dwarf2_locate_v2_dwp_sections): Likewise.
(hash_dwp_loaded_cutus): Likewise.
(eq_dwp_loaded_cutus): Likewise.
(lookup_dwo_cutu): Likewise.
(abbrev_table_free_cleanup): Likewise.
(dwarf2_free_abbrev_table): Likewise.
(find_partial_die_in_comp_unit): Likewise.
(free_line_header_voidp): Likewise.
(follow_die_offset): Likewise.
(follow_die_sig_1): Likewise.
(free_heap_comp_unit): Likewise.
(free_stack_comp_unit): Likewise.
(dwarf2_free_objfile): Likewise.
(per_cu_offset_and_type_hash): Likewise.
(per_cu_offset_and_type_eq): Likewise.
(get_die_type_at_offset): Likewise.
(partial_die_hash): Likewise.
(partial_die_eq): Likewise.
(dwarf2_per_objfile_free): Likewise.
(hash_strtab_entry): Likewise.
(eq_strtab_entry): Likewise.
(add_string): Likewise.
(hash_symtab_entry): Likewise.
(eq_symtab_entry): Likewise.
(delete_symtab_entry): Likewise.
(cleanup_mapped_symtab): Likewise.
(add_indices_to_cpool): Likewise.
(hash_psymtab_cu_index): Likewise.
(eq_psymtab_cu_index): Likewise.
(add_address_entry_worker): Likewise.
(unlink_if_set): Likewise.
(write_one_signatured_type): Likewise.
(save_gdb_index_command): Likewise.
* elfread.c (elf_symtab_read): Likewise.
(elf_gnu_ifunc_cache_hash): Likewise.
(elf_gnu_ifunc_cache_eq): Likewise.
(elf_gnu_ifunc_record_cache): Likewise.
(elf_gnu_ifunc_resolve_by_cache): Likewise.
(elf_get_probes): Likewise.
(probe_key_free): Likewise.
* f-lang.c (builtin_f_type): Likewise.
* frame-base.c (frame_base_append_sniffer): Likewise.
(frame_base_set_default): Likewise.
(frame_base_find_by_frame): Likewise.
* frame-unwind.c (frame_unwind_prepend_unwinder): Likewise.
(frame_unwind_append_unwinder): Likewise.
(frame_unwind_find_by_frame): Likewise.
* frame.c (frame_addr_hash): Likewise.
(frame_addr_hash_eq): Likewise.
(frame_stash_find): Likewise.
(do_frame_register_read): Likewise.
(unwind_to_current_frame): Likewise.
(frame_cleanup_after_sniffer): Likewise.
* frv-linux-tdep.c (frv_linux_sigtramp_frame_cache): Likewise.
* frv-tdep.c (frv_frame_unwind_cache): Likewise.
* ft32-tdep.c (ft32_frame_cache): Likewise.
* gcore.c (do_bfd_delete_cleanup): Likewise.
(gcore_create_callback): Likewise.
* gdb_bfd.c (hash_bfd): Likewise.
(eq_bfd): Likewise.
(gdb_bfd_open): Likewise.
(free_one_bfd_section): Likewise.
(gdb_bfd_ref): Likewise.
(gdb_bfd_unref): Likewise.
(get_section_descriptor): Likewise.
(gdb_bfd_map_section): Likewise.
(gdb_bfd_crc): Likewise.
(gdb_bfd_mark_parent): Likewise.
(gdb_bfd_record_inclusion): Likewise.
(gdb_bfd_requires_relocations): Likewise.
(print_one_bfd): Likewise.
* gdbtypes.c (type_pair_hash): Likewise.
(type_pair_eq): Likewise.
(builtin_type): Likewise.
(objfile_type): Likewise.
* gnu-v3-abi.c (vtable_ptrdiff_type): Likewise.
(vtable_address_point_offset): Likewise.
(gnuv3_get_vtable): Likewise.
(hash_value_and_voffset): Likewise.
(eq_value_and_voffset): Likewise.
(compare_value_and_voffset): Likewise.
(compute_vtable_size): Likewise.
(gnuv3_get_typeid_type): Likewise.
* go-lang.c (builtin_go_type): Likewise.
* guile/scm-block.c (bkscm_hash_block_smob): Likewise.
(bkscm_eq_block_smob): Likewise.
(bkscm_objfile_block_map): Likewise.
(bkscm_del_objfile_blocks): Likewise.
* guile/scm-breakpoint.c (bpscm_build_bp_list): Likewise.
* guile/scm-disasm.c (gdbscm_disasm_read_memory_worker): Likewise.
(gdbscm_disasm_print_address): Likewise.
* guile/scm-frame.c (frscm_hash_frame_smob): Likewise.
(frscm_eq_frame_smob): Likewise.
(frscm_inferior_frame_map): Likewise.
(frscm_del_inferior_frames): Likewise.
* guile/scm-gsmob.c (gdbscm_add_objfile_ref): Likewise.
* guile/scm-objfile.c (ofscm_handle_objfile_deleted): Likewise.
(ofscm_objfile_smob_from_objfile): Likewise.
* guile/scm-ports.c (ioscm_write): Likewise.
(ioscm_file_port_delete): Likewise.
(ioscm_file_port_rewind): Likewise.
(ioscm_file_port_put): Likewise.
(ioscm_file_port_write): Likewise.
* guile/scm-progspace.c (psscm_handle_pspace_deleted): Likewise.
(psscm_pspace_smob_from_pspace): Likewise.
* guile/scm-safe-call.c (scscm_recording_pre_unwind_handler): Likewise.
(scscm_recording_unwind_handler): Likewise.
(gdbscm_with_catch): Likewise.
(scscm_call_0_body): Likewise.
(scscm_call_1_body): Likewise.
(scscm_call_2_body): Likewise.
(scscm_call_3_body): Likewise.
(scscm_call_4_body): Likewise.
(scscm_apply_1_body): Likewise.
(scscm_eval_scheme_string): Likewise.
(gdbscm_safe_eval_string): Likewise.
(scscm_source_scheme_script): Likewise.
(gdbscm_safe_source_script): Likewise.
* guile/scm-string.c (gdbscm_call_scm_to_stringn): Likewise.
(gdbscm_call_scm_from_stringn): Likewise.
* guile/scm-symbol.c (syscm_hash_symbol_smob): Likewise.
(syscm_eq_symbol_smob): Likewise.
(syscm_get_symbol_map): Likewise.
(syscm_del_objfile_symbols): Likewise.
* guile/scm-symtab.c (stscm_hash_symtab_smob): Likewise.
(stscm_eq_symtab_smob): Likewise.
(stscm_objfile_symtab_map): Likewise.
(stscm_del_objfile_symtabs): Likewise.
* guile/scm-type.c (tyscm_hash_type_smob): Likewise.
(tyscm_eq_type_smob): Likewise.
(tyscm_type_map): Likewise.
(tyscm_copy_type_recursive): Likewise.
(save_objfile_types): Likewise.
* guile/scm-utils.c (extract_arg): Likewise.
* h8300-tdep.c (h8300_frame_cache): Likewise.
* hppa-linux-tdep.c (hppa_linux_sigtramp_frame_unwind_cache): Likewise.
* hppa-tdep.c (compare_unwind_entries): Likewise.
(find_unwind_entry): Likewise.
(hppa_frame_cache): Likewise.
(hppa_stub_frame_unwind_cache): Likewise.
* hppanbsd-tdep.c (hppanbsd_supply_gregset): Likewise.
* hppaobsd-tdep.c (hppaobsd_supply_gregset): Likewise.
(hppaobsd_supply_fpregset): Likewise.
* i386-cygwin-tdep.c (core_process_module_section): Likewise.
* i386-linux-tdep.c (i386_linux_init_abi): Likewise.
* i386-tdep.c (i386_frame_cache): Likewise.
(i386_epilogue_frame_cache): Likewise.
(i386_sigtramp_frame_cache): Likewise.
(i386_supply_gregset): Likewise.
(i386_collect_gregset): Likewise.
(i386_gdbarch_init): Likewise.
* i386obsd-tdep.c (i386obsd_aout_supply_regset): Likewise.
(i386obsd_trapframe_cache): Likewise.
* i387-tdep.c (i387_supply_fsave): Likewise.
(i387_collect_fsave): Likewise.
(i387_supply_fxsave): Likewise.
(i387_collect_fxsave): Likewise.
(i387_supply_xsave): Likewise.
(i387_collect_xsave): Likewise.
* ia64-tdep.c (ia64_frame_cache): Likewise.
(ia64_sigtramp_frame_cache): Likewise.
* infcmd.c (attach_command_continuation): Likewise.
(attach_command_continuation_free_args): Likewise.
* inferior.c (restore_inferior): Likewise.
(delete_thread_of_inferior): Likewise.
* inflow.c (inflow_inferior_data_cleanup): Likewise.
(get_inflow_inferior_data): Likewise.
(inflow_inferior_exit): Likewise.
* infrun.c (displaced_step_clear_cleanup): Likewise.
(restore_current_uiout_cleanup): Likewise.
(release_stop_context_cleanup): Likewise.
(do_restore_infcall_suspend_state_cleanup): Likewise.
(do_restore_infcall_control_state_cleanup): Likewise.
(restore_inferior_ptid): Likewise.
* inline-frame.c (block_starting_point_at): Likewise.
* iq2000-tdep.c (iq2000_frame_cache): Likewise.
* jit.c (get_jit_objfile_data): Likewise.
(get_jit_program_space_data): Likewise.
(jit_object_close_impl): Likewise.
(jit_find_objf_with_entry_addr): Likewise.
(jit_breakpoint_deleted): Likewise.
(jit_unwind_reg_set_impl): Likewise.
(jit_unwind_reg_get_impl): Likewise.
(jit_dealloc_cache): Likewise.
(jit_frame_sniffer): Likewise.
(jit_frame_prev_register): Likewise.
(jit_prepend_unwinder): Likewise.
(jit_inferior_exit_hook): Likewise.
(free_objfile_data): Likewise.
* jv-lang.c (jv_per_objfile_free): Likewise.
(get_dynamics_objfile): Likewise.
(get_java_class_symtab): Likewise.
(builtin_java_type): Likewise.
* language.c (language_string_char_type): Likewise.
(language_bool_type): Likewise.
(language_lookup_primitive_type): Likewise.
(language_lookup_primitive_type_as_symbol): Likewise.
* linespec.c (hash_address_entry): Likewise.
(eq_address_entry): Likewise.
(iterate_inline_only): Likewise.
(iterate_name_matcher): Likewise.
(decode_line_2_compare_items): Likewise.
(collect_one_symbol): Likewise.
(compare_symbols): Likewise.
(compare_msymbols): Likewise.
(add_symtabs_to_list): Likewise.
(collect_symbols): Likewise.
(compare_msyms): Likewise.
(add_minsym): Likewise.
(cleanup_linespec_result): Likewise.
* linux-fork.c (inferior_call_waitpid_cleanup): Likewise.
* linux-nat.c (delete_lwp_cleanup): Likewise.
(count_events_callback): Likewise.
(select_event_lwp_callback): Likewise.
(resume_stopped_resumed_lwps): Likewise.
* linux-tdep.c (get_linux_gdbarch_data): Likewise.
(invalidate_linux_cache_inf): Likewise.
(get_linux_inferior_data): Likewise.
(linux_find_memory_regions_thunk): Likewise.
(linux_make_mappings_callback): Likewise.
(linux_corefile_thread_callback): Likewise.
(find_mapping_size): Likewise.
* linux-thread-db.c (find_new_threads_callback): Likewise.
* lm32-tdep.c (lm32_frame_cache): Likewise.
* m2-lang.c (builtin_m2_type): Likewise.
* m32c-tdep.c (m32c_analyze_frame_prologue): Likewise.
* m32r-linux-tdep.c (m32r_linux_sigtramp_frame_cache): Likewise.
(m32r_linux_supply_gregset): Likewise.
(m32r_linux_collect_gregset): Likewise.
* m32r-tdep.c (m32r_frame_unwind_cache): Likewise.
* m68hc11-tdep.c (m68hc11_frame_unwind_cache): Likewise.
* m68k-tdep.c (m68k_frame_cache): Likewise.
* m68kbsd-tdep.c (m68kbsd_supply_fpregset): Likewise.
(m68kbsd_supply_gregset): Likewise.
* m68klinux-tdep.c (m68k_linux_sigtramp_frame_cache): Likewise.
* m88k-tdep.c (m88k_frame_cache): Likewise.
(m88k_supply_gregset): Likewise.
gdb/gdbserver/ChangeLog:
* dll.c (match_dll): Add cast(s).
(unloaded_dll): Likewise.
* linux-low.c (second_thread_of_pid_p): Likewise.
(delete_lwp_callback): Likewise.
(count_events_callback): Likewise.
(select_event_lwp_callback): Likewise.
(linux_set_resume_request): Likewise.
* server.c (accumulate_file_name_length): Likewise.
(emit_dll_description): Likewise.
(handle_qxfer_threads_worker): Likewise.
(visit_actioned_threads): Likewise.
* thread-db.c (any_thread_of): Likewise.
* tracepoint.c (same_process_p): Likewise.
(match_blocktype): Likewise.
(build_traceframe_info_xml): Likewise.
gdb/testsuite/ChangeLog:
* gdb.gdb/selftest.exp (do_steps_and_nexts): Adjust expected
source line.
2015-09-26 02:08:07 +08:00
|
|
|
btrace = (struct btrace_data *) user_data;
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
parse_xml_raw (parser, body_text, &btrace->variant.pt.data,
|
|
|
|
&btrace->variant.pt.size);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Parse a btrace "pt" xml record. */
|
|
|
|
|
|
|
|
static void
|
|
|
|
parse_xml_btrace_pt (struct gdb_xml_parser *parser,
|
|
|
|
const struct gdb_xml_element *element,
|
|
|
|
void *user_data, VEC (gdb_xml_value_s) *attributes)
|
|
|
|
{
|
|
|
|
struct btrace_data *btrace;
|
|
|
|
|
Add some more casts (1/2)
Note: I needed to split this patch in two, otherwise it's too big for
the mailing list.
This patch adds explicit casts to situations where a void pointer is
assigned to a pointer to the "real" type. Building in C++ mode requires
those assignments to use an explicit cast. This includes, for example:
- callback arguments (cleanups, comparison functions, ...)
- data attached to some object (objfile, program space, etc) in the form
of a void pointer
- "user data" passed to some function
This patch comes from the commit "(mostly) auto-generated patch to insert
casts needed for C++", taken from Pedro's C++ branch.
Only files built on x86 with --enable-targets=all are modified, so the
native files for other arches will need to be dealt with separately.
I built-tested this with --enable-targets=all and reg-tested. To my
surprise, a test case (selftest.exp) had to be adjusted.
Here's the ChangeLog entry. Again, this was relatively quick to make
despite the length, thanks to David Malcom's script, although I don't
believe it's very useful information in that particular case...
gdb/ChangeLog:
* aarch64-tdep.c (aarch64_make_prologue_cache): Add cast(s).
(aarch64_make_stub_cache): Likewise.
(value_of_aarch64_user_reg): Likewise.
* ada-lang.c (ada_inferior_data_cleanup): Likewise.
(get_ada_inferior_data): Likewise.
(get_ada_pspace_data): Likewise.
(ada_pspace_data_cleanup): Likewise.
(ada_complete_symbol_matcher): Likewise.
(ada_exc_search_name_matches): Likewise.
* ada-tasks.c (get_ada_tasks_pspace_data): Likewise.
(get_ada_tasks_inferior_data): Likewise.
* addrmap.c (addrmap_mutable_foreach_worker): Likewise.
(splay_obstack_alloc): Likewise.
(splay_obstack_free): Likewise.
* alpha-linux-tdep.c (alpha_linux_supply_gregset): Likewise.
(alpha_linux_collect_gregset): Likewise.
(alpha_linux_supply_fpregset): Likewise.
(alpha_linux_collect_fpregset): Likewise.
* alpha-mdebug-tdep.c (alpha_mdebug_frame_unwind_cache): Likewise.
* alpha-tdep.c (alpha_lds): Likewise.
(alpha_sts): Likewise.
(alpha_sigtramp_frame_unwind_cache): Likewise.
(alpha_heuristic_frame_unwind_cache): Likewise.
(alpha_supply_int_regs): Likewise.
(alpha_fill_int_regs): Likewise.
(alpha_supply_fp_regs): Likewise.
(alpha_fill_fp_regs): Likewise.
* alphanbsd-tdep.c (alphanbsd_supply_fpregset): Likewise.
(alphanbsd_aout_supply_gregset): Likewise.
(alphanbsd_supply_gregset): Likewise.
* amd64-linux-tdep.c (amd64_linux_init_abi): Likewise.
(amd64_x32_linux_init_abi): Likewise.
* amd64-nat.c (amd64_supply_native_gregset): Likewise.
(amd64_collect_native_gregset): Likewise.
* amd64-tdep.c (amd64_frame_cache): Likewise.
(amd64_sigtramp_frame_cache): Likewise.
(amd64_epilogue_frame_cache): Likewise.
(amd64_supply_fxsave): Likewise.
(amd64_supply_xsave): Likewise.
(amd64_collect_fxsave): Likewise.
(amd64_collect_xsave): Likewise.
* amd64-windows-tdep.c (amd64_windows_frame_cache): Likewise.
* amd64obsd-tdep.c (amd64obsd_trapframe_cache): Likewise.
* arm-linux-tdep.c (arm_linux_supply_gregset): Likewise.
(arm_linux_collect_gregset): Likewise.
(arm_linux_supply_nwfpe): Likewise.
(arm_linux_collect_nwfpe): Likewise.
(arm_linux_supply_vfp): Likewise.
(arm_linux_collect_vfp): Likewise.
* arm-tdep.c (arm_find_mapping_symbol): Likewise.
(arm_prologue_unwind_stop_reason): Likewise.
(arm_prologue_this_id): Likewise.
(arm_prologue_prev_register): Likewise.
(arm_exidx_data_free): Likewise.
(arm_find_exidx_entry): Likewise.
(arm_stub_this_id): Likewise.
(arm_m_exception_this_id): Likewise.
(arm_m_exception_prev_register): Likewise.
(arm_normal_frame_base): Likewise.
(gdb_print_insn_arm): Likewise.
(arm_objfile_data_free): Likewise.
(arm_record_special_symbol): Likewise.
(value_of_arm_user_reg): Likewise.
* armbsd-tdep.c (armbsd_supply_fpregset): Likewise.
(armbsd_supply_gregset): Likewise.
* auto-load.c (auto_load_pspace_data_cleanup): Likewise.
(get_auto_load_pspace_data): Likewise.
(hash_loaded_script_entry): Likewise.
(eq_loaded_script_entry): Likewise.
(clear_section_scripts): Likewise.
(collect_matching_scripts): Likewise.
* auxv.c (auxv_inferior_data_cleanup): Likewise.
(get_auxv_inferior_data): Likewise.
* avr-tdep.c (avr_frame_unwind_cache): Likewise.
* ax-general.c (do_free_agent_expr_cleanup): Likewise.
* bfd-target.c (target_bfd_xfer_partial): Likewise.
(target_bfd_xclose): Likewise.
(target_bfd_get_section_table): Likewise.
* bfin-tdep.c (bfin_frame_cache): Likewise.
* block.c (find_block_in_blockvector): Likewise.
(call_site_for_pc): Likewise.
(block_find_non_opaque_type_preferred): Likewise.
* break-catch-sig.c (signal_catchpoint_insert_location): Likewise.
(signal_catchpoint_remove_location): Likewise.
(signal_catchpoint_breakpoint_hit): Likewise.
(signal_catchpoint_print_one): Likewise.
(signal_catchpoint_print_mention): Likewise.
(signal_catchpoint_print_recreate): Likewise.
* break-catch-syscall.c (get_catch_syscall_inferior_data): Likewise.
* breakpoint.c (do_cleanup_counted_command_line): Likewise.
(bp_location_compare_addrs): Likewise.
(get_first_locp_gte_addr): Likewise.
(check_tracepoint_command): Likewise.
(do_map_commands_command): Likewise.
(get_breakpoint_objfile_data): Likewise.
(free_breakpoint_probes): Likewise.
(do_captured_breakpoint_query): Likewise.
(compare_breakpoints): Likewise.
(bp_location_compare): Likewise.
(bpstat_remove_breakpoint_callback): Likewise.
(do_delete_breakpoint_cleanup): Likewise.
* bsd-uthread.c (bsd_uthread_set_supply_uthread): Likewise.
(bsd_uthread_set_collect_uthread): Likewise.
(bsd_uthread_activate): Likewise.
(bsd_uthread_fetch_registers): Likewise.
(bsd_uthread_store_registers): Likewise.
* btrace.c (check_xml_btrace_version): Likewise.
(parse_xml_btrace_block): Likewise.
(parse_xml_btrace_pt_config_cpu): Likewise.
(parse_xml_btrace_pt_raw): Likewise.
(parse_xml_btrace_pt): Likewise.
(parse_xml_btrace_conf_bts): Likewise.
(parse_xml_btrace_conf_pt): Likewise.
(do_btrace_data_cleanup): Likewise.
* c-typeprint.c (find_typedef_for_canonicalize): Likewise.
* charset.c (cleanup_iconv): Likewise.
(do_cleanup_iterator): Likewise.
* cli-out.c (cli_uiout_dtor): Likewise.
(cli_table_begin): Likewise.
(cli_table_body): Likewise.
(cli_table_end): Likewise.
(cli_table_header): Likewise.
(cli_begin): Likewise.
(cli_end): Likewise.
(cli_field_int): Likewise.
(cli_field_skip): Likewise.
(cli_field_string): Likewise.
(cli_field_fmt): Likewise.
(cli_spaces): Likewise.
(cli_text): Likewise.
(cli_message): Likewise.
(cli_wrap_hint): Likewise.
(cli_flush): Likewise.
(cli_redirect): Likewise.
(out_field_fmt): Likewise.
(field_separator): Likewise.
(cli_out_set_stream): Likewise.
* cli/cli-cmds.c (compare_symtabs): Likewise.
* cli/cli-dump.c (call_dump_func): Likewise.
(restore_section_callback): Likewise.
* cli/cli-script.c (clear_hook_in_cleanup): Likewise.
(do_restore_user_call_depth): Likewise.
(do_free_command_lines_cleanup): Likewise.
* coff-pe-read.c (get_section_vmas): Likewise.
(pe_as16): Likewise.
(pe_as32): Likewise.
* coffread.c (coff_symfile_read): Likewise.
* common/agent.c (agent_look_up_symbols): Likewise.
* common/filestuff.c (do_close_cleanup): Likewise.
* common/format.c (free_format_pieces_cleanup): Likewise.
* common/vec.c (vec_o_reserve): Likewise.
* compile/compile-c-support.c (print_one_macro): Likewise.
* compile/compile-c-symbols.c (hash_symbol_error): Likewise.
(eq_symbol_error): Likewise.
(del_symbol_error): Likewise.
(error_symbol_once): Likewise.
(gcc_convert_symbol): Likewise.
(gcc_symbol_address): Likewise.
(hash_symname): Likewise.
(eq_symname): Likewise.
* compile/compile-c-types.c (hash_type_map_instance): Likewise.
(eq_type_map_instance): Likewise.
(insert_type): Likewise.
(convert_type): Likewise.
* compile/compile-object-load.c (munmap_listp_free_cleanup): Likewise.
(setup_sections): Likewise.
(link_hash_table_free): Likewise.
(copy_sections): Likewise.
* compile/compile-object-run.c (do_module_cleanup): Likewise.
* compile/compile.c (compile_print_value): Likewise.
(do_rmdir): Likewise.
(cleanup_compile_instance): Likewise.
(cleanup_unlink_file): Likewise.
* completer.c (free_completion_tracker): Likewise.
* corelow.c (add_to_spuid_list): Likewise.
* cp-namespace.c (reset_directive_searched): Likewise.
* cp-support.c (reset_directive_searched): Likewise.
* cris-tdep.c (cris_sigtramp_frame_unwind_cache): Likewise.
(cris_frame_unwind_cache): Likewise.
* d-lang.c (builtin_d_type): Likewise.
* d-namespace.c (reset_directive_searched): Likewise.
* dbxread.c (dbx_free_symfile_info): Likewise.
(do_free_bincl_list_cleanup): Likewise.
* disasm.c (hash_dis_line_entry): Likewise.
(eq_dis_line_entry): Likewise.
(dis_asm_print_address): Likewise.
(fprintf_disasm): Likewise.
(do_ui_file_delete): Likewise.
* doublest.c (convert_floatformat_to_doublest): Likewise.
* dummy-frame.c (pop_dummy_frame_bpt): Likewise.
(dummy_frame_prev_register): Likewise.
(dummy_frame_this_id): Likewise.
* dwarf2-frame-tailcall.c (cache_hash): Likewise.
(cache_eq): Likewise.
(cache_find): Likewise.
(tailcall_frame_this_id): Likewise.
(dwarf2_tailcall_prev_register_first): Likewise.
(tailcall_frame_prev_register): Likewise.
(tailcall_frame_dealloc_cache): Likewise.
(tailcall_frame_prev_arch): Likewise.
* dwarf2-frame.c (dwarf2_frame_state_free): Likewise.
(dwarf2_frame_set_init_reg): Likewise.
(dwarf2_frame_init_reg): Likewise.
(dwarf2_frame_set_signal_frame_p): Likewise.
(dwarf2_frame_signal_frame_p): Likewise.
(dwarf2_frame_set_adjust_regnum): Likewise.
(dwarf2_frame_adjust_regnum): Likewise.
(clear_pointer_cleanup): Likewise.
(dwarf2_frame_cache): Likewise.
(find_cie): Likewise.
(dwarf2_frame_find_fde): Likewise.
* dwarf2expr.c (dwarf_expr_address_type): Likewise.
(free_dwarf_expr_context_cleanup): Likewise.
* dwarf2loc.c (locexpr_find_frame_base_location): Likewise.
(locexpr_get_frame_base): Likewise.
(loclist_find_frame_base_location): Likewise.
(loclist_get_frame_base): Likewise.
(dwarf_expr_dwarf_call): Likewise.
(dwarf_expr_get_base_type): Likewise.
(dwarf_expr_push_dwarf_reg_entry_value): Likewise.
(dwarf_expr_get_obj_addr): Likewise.
(entry_data_value_coerce_ref): Likewise.
(entry_data_value_copy_closure): Likewise.
(entry_data_value_free_closure): Likewise.
(get_frame_address_in_block_wrapper): Likewise.
(dwarf2_evaluate_property): Likewise.
(dwarf2_compile_property_to_c): Likewise.
(needs_frame_read_addr_from_reg): Likewise.
(needs_frame_get_reg_value): Likewise.
(needs_frame_frame_base): Likewise.
(needs_frame_frame_cfa): Likewise.
(needs_frame_tls_address): Likewise.
(needs_frame_dwarf_call): Likewise.
(needs_dwarf_reg_entry_value): Likewise.
(get_ax_pc): Likewise.
(locexpr_read_variable): Likewise.
(locexpr_read_variable_at_entry): Likewise.
(locexpr_read_needs_frame): Likewise.
(locexpr_describe_location): Likewise.
(locexpr_tracepoint_var_ref): Likewise.
(locexpr_generate_c_location): Likewise.
(loclist_read_variable): Likewise.
(loclist_read_variable_at_entry): Likewise.
(loclist_describe_location): Likewise.
(loclist_tracepoint_var_ref): Likewise.
(loclist_generate_c_location): Likewise.
* dwarf2read.c (line_header_hash_voidp): Likewise.
(line_header_eq_voidp): Likewise.
(dwarf2_has_info): Likewise.
(dwarf2_get_section_info): Likewise.
(locate_dwz_sections): Likewise.
(hash_file_name_entry): Likewise.
(eq_file_name_entry): Likewise.
(delete_file_name_entry): Likewise.
(dw2_setup): Likewise.
(dw2_get_file_names_reader): Likewise.
(dw2_find_pc_sect_compunit_symtab): Likewise.
(hash_signatured_type): Likewise.
(eq_signatured_type): Likewise.
(add_signatured_type_cu_to_table): Likewise.
(create_debug_types_hash_table): Likewise.
(lookup_dwo_signatured_type): Likewise.
(lookup_dwp_signatured_type): Likewise.
(lookup_signatured_type): Likewise.
(hash_type_unit_group): Likewise.
(eq_type_unit_group): Likewise.
(get_type_unit_group): Likewise.
(process_psymtab_comp_unit_reader): Likewise.
(sort_tu_by_abbrev_offset): Likewise.
(process_skeletonless_type_unit): Likewise.
(psymtabs_addrmap_cleanup): Likewise.
(dwarf2_read_symtab): Likewise.
(psymtab_to_symtab_1): Likewise.
(die_hash): Likewise.
(die_eq): Likewise.
(load_full_comp_unit_reader): Likewise.
(reset_die_in_process): Likewise.
(free_cu_line_header): Likewise.
(handle_DW_AT_stmt_list): Likewise.
(hash_dwo_file): Likewise.
(eq_dwo_file): Likewise.
(hash_dwo_unit): Likewise.
(eq_dwo_unit): Likewise.
(create_dwo_cu_reader): Likewise.
(create_dwo_unit_in_dwp_v1): Likewise.
(create_dwo_unit_in_dwp_v2): Likewise.
(lookup_dwo_unit_in_dwp): Likewise.
(dwarf2_locate_dwo_sections): Likewise.
(dwarf2_locate_common_dwp_sections): Likewise.
(dwarf2_locate_v2_dwp_sections): Likewise.
(hash_dwp_loaded_cutus): Likewise.
(eq_dwp_loaded_cutus): Likewise.
(lookup_dwo_cutu): Likewise.
(abbrev_table_free_cleanup): Likewise.
(dwarf2_free_abbrev_table): Likewise.
(find_partial_die_in_comp_unit): Likewise.
(free_line_header_voidp): Likewise.
(follow_die_offset): Likewise.
(follow_die_sig_1): Likewise.
(free_heap_comp_unit): Likewise.
(free_stack_comp_unit): Likewise.
(dwarf2_free_objfile): Likewise.
(per_cu_offset_and_type_hash): Likewise.
(per_cu_offset_and_type_eq): Likewise.
(get_die_type_at_offset): Likewise.
(partial_die_hash): Likewise.
(partial_die_eq): Likewise.
(dwarf2_per_objfile_free): Likewise.
(hash_strtab_entry): Likewise.
(eq_strtab_entry): Likewise.
(add_string): Likewise.
(hash_symtab_entry): Likewise.
(eq_symtab_entry): Likewise.
(delete_symtab_entry): Likewise.
(cleanup_mapped_symtab): Likewise.
(add_indices_to_cpool): Likewise.
(hash_psymtab_cu_index): Likewise.
(eq_psymtab_cu_index): Likewise.
(add_address_entry_worker): Likewise.
(unlink_if_set): Likewise.
(write_one_signatured_type): Likewise.
(save_gdb_index_command): Likewise.
* elfread.c (elf_symtab_read): Likewise.
(elf_gnu_ifunc_cache_hash): Likewise.
(elf_gnu_ifunc_cache_eq): Likewise.
(elf_gnu_ifunc_record_cache): Likewise.
(elf_gnu_ifunc_resolve_by_cache): Likewise.
(elf_get_probes): Likewise.
(probe_key_free): Likewise.
* f-lang.c (builtin_f_type): Likewise.
* frame-base.c (frame_base_append_sniffer): Likewise.
(frame_base_set_default): Likewise.
(frame_base_find_by_frame): Likewise.
* frame-unwind.c (frame_unwind_prepend_unwinder): Likewise.
(frame_unwind_append_unwinder): Likewise.
(frame_unwind_find_by_frame): Likewise.
* frame.c (frame_addr_hash): Likewise.
(frame_addr_hash_eq): Likewise.
(frame_stash_find): Likewise.
(do_frame_register_read): Likewise.
(unwind_to_current_frame): Likewise.
(frame_cleanup_after_sniffer): Likewise.
* frv-linux-tdep.c (frv_linux_sigtramp_frame_cache): Likewise.
* frv-tdep.c (frv_frame_unwind_cache): Likewise.
* ft32-tdep.c (ft32_frame_cache): Likewise.
* gcore.c (do_bfd_delete_cleanup): Likewise.
(gcore_create_callback): Likewise.
* gdb_bfd.c (hash_bfd): Likewise.
(eq_bfd): Likewise.
(gdb_bfd_open): Likewise.
(free_one_bfd_section): Likewise.
(gdb_bfd_ref): Likewise.
(gdb_bfd_unref): Likewise.
(get_section_descriptor): Likewise.
(gdb_bfd_map_section): Likewise.
(gdb_bfd_crc): Likewise.
(gdb_bfd_mark_parent): Likewise.
(gdb_bfd_record_inclusion): Likewise.
(gdb_bfd_requires_relocations): Likewise.
(print_one_bfd): Likewise.
* gdbtypes.c (type_pair_hash): Likewise.
(type_pair_eq): Likewise.
(builtin_type): Likewise.
(objfile_type): Likewise.
* gnu-v3-abi.c (vtable_ptrdiff_type): Likewise.
(vtable_address_point_offset): Likewise.
(gnuv3_get_vtable): Likewise.
(hash_value_and_voffset): Likewise.
(eq_value_and_voffset): Likewise.
(compare_value_and_voffset): Likewise.
(compute_vtable_size): Likewise.
(gnuv3_get_typeid_type): Likewise.
* go-lang.c (builtin_go_type): Likewise.
* guile/scm-block.c (bkscm_hash_block_smob): Likewise.
(bkscm_eq_block_smob): Likewise.
(bkscm_objfile_block_map): Likewise.
(bkscm_del_objfile_blocks): Likewise.
* guile/scm-breakpoint.c (bpscm_build_bp_list): Likewise.
* guile/scm-disasm.c (gdbscm_disasm_read_memory_worker): Likewise.
(gdbscm_disasm_print_address): Likewise.
* guile/scm-frame.c (frscm_hash_frame_smob): Likewise.
(frscm_eq_frame_smob): Likewise.
(frscm_inferior_frame_map): Likewise.
(frscm_del_inferior_frames): Likewise.
* guile/scm-gsmob.c (gdbscm_add_objfile_ref): Likewise.
* guile/scm-objfile.c (ofscm_handle_objfile_deleted): Likewise.
(ofscm_objfile_smob_from_objfile): Likewise.
* guile/scm-ports.c (ioscm_write): Likewise.
(ioscm_file_port_delete): Likewise.
(ioscm_file_port_rewind): Likewise.
(ioscm_file_port_put): Likewise.
(ioscm_file_port_write): Likewise.
* guile/scm-progspace.c (psscm_handle_pspace_deleted): Likewise.
(psscm_pspace_smob_from_pspace): Likewise.
* guile/scm-safe-call.c (scscm_recording_pre_unwind_handler): Likewise.
(scscm_recording_unwind_handler): Likewise.
(gdbscm_with_catch): Likewise.
(scscm_call_0_body): Likewise.
(scscm_call_1_body): Likewise.
(scscm_call_2_body): Likewise.
(scscm_call_3_body): Likewise.
(scscm_call_4_body): Likewise.
(scscm_apply_1_body): Likewise.
(scscm_eval_scheme_string): Likewise.
(gdbscm_safe_eval_string): Likewise.
(scscm_source_scheme_script): Likewise.
(gdbscm_safe_source_script): Likewise.
* guile/scm-string.c (gdbscm_call_scm_to_stringn): Likewise.
(gdbscm_call_scm_from_stringn): Likewise.
* guile/scm-symbol.c (syscm_hash_symbol_smob): Likewise.
(syscm_eq_symbol_smob): Likewise.
(syscm_get_symbol_map): Likewise.
(syscm_del_objfile_symbols): Likewise.
* guile/scm-symtab.c (stscm_hash_symtab_smob): Likewise.
(stscm_eq_symtab_smob): Likewise.
(stscm_objfile_symtab_map): Likewise.
(stscm_del_objfile_symtabs): Likewise.
* guile/scm-type.c (tyscm_hash_type_smob): Likewise.
(tyscm_eq_type_smob): Likewise.
(tyscm_type_map): Likewise.
(tyscm_copy_type_recursive): Likewise.
(save_objfile_types): Likewise.
* guile/scm-utils.c (extract_arg): Likewise.
* h8300-tdep.c (h8300_frame_cache): Likewise.
* hppa-linux-tdep.c (hppa_linux_sigtramp_frame_unwind_cache): Likewise.
* hppa-tdep.c (compare_unwind_entries): Likewise.
(find_unwind_entry): Likewise.
(hppa_frame_cache): Likewise.
(hppa_stub_frame_unwind_cache): Likewise.
* hppanbsd-tdep.c (hppanbsd_supply_gregset): Likewise.
* hppaobsd-tdep.c (hppaobsd_supply_gregset): Likewise.
(hppaobsd_supply_fpregset): Likewise.
* i386-cygwin-tdep.c (core_process_module_section): Likewise.
* i386-linux-tdep.c (i386_linux_init_abi): Likewise.
* i386-tdep.c (i386_frame_cache): Likewise.
(i386_epilogue_frame_cache): Likewise.
(i386_sigtramp_frame_cache): Likewise.
(i386_supply_gregset): Likewise.
(i386_collect_gregset): Likewise.
(i386_gdbarch_init): Likewise.
* i386obsd-tdep.c (i386obsd_aout_supply_regset): Likewise.
(i386obsd_trapframe_cache): Likewise.
* i387-tdep.c (i387_supply_fsave): Likewise.
(i387_collect_fsave): Likewise.
(i387_supply_fxsave): Likewise.
(i387_collect_fxsave): Likewise.
(i387_supply_xsave): Likewise.
(i387_collect_xsave): Likewise.
* ia64-tdep.c (ia64_frame_cache): Likewise.
(ia64_sigtramp_frame_cache): Likewise.
* infcmd.c (attach_command_continuation): Likewise.
(attach_command_continuation_free_args): Likewise.
* inferior.c (restore_inferior): Likewise.
(delete_thread_of_inferior): Likewise.
* inflow.c (inflow_inferior_data_cleanup): Likewise.
(get_inflow_inferior_data): Likewise.
(inflow_inferior_exit): Likewise.
* infrun.c (displaced_step_clear_cleanup): Likewise.
(restore_current_uiout_cleanup): Likewise.
(release_stop_context_cleanup): Likewise.
(do_restore_infcall_suspend_state_cleanup): Likewise.
(do_restore_infcall_control_state_cleanup): Likewise.
(restore_inferior_ptid): Likewise.
* inline-frame.c (block_starting_point_at): Likewise.
* iq2000-tdep.c (iq2000_frame_cache): Likewise.
* jit.c (get_jit_objfile_data): Likewise.
(get_jit_program_space_data): Likewise.
(jit_object_close_impl): Likewise.
(jit_find_objf_with_entry_addr): Likewise.
(jit_breakpoint_deleted): Likewise.
(jit_unwind_reg_set_impl): Likewise.
(jit_unwind_reg_get_impl): Likewise.
(jit_dealloc_cache): Likewise.
(jit_frame_sniffer): Likewise.
(jit_frame_prev_register): Likewise.
(jit_prepend_unwinder): Likewise.
(jit_inferior_exit_hook): Likewise.
(free_objfile_data): Likewise.
* jv-lang.c (jv_per_objfile_free): Likewise.
(get_dynamics_objfile): Likewise.
(get_java_class_symtab): Likewise.
(builtin_java_type): Likewise.
* language.c (language_string_char_type): Likewise.
(language_bool_type): Likewise.
(language_lookup_primitive_type): Likewise.
(language_lookup_primitive_type_as_symbol): Likewise.
* linespec.c (hash_address_entry): Likewise.
(eq_address_entry): Likewise.
(iterate_inline_only): Likewise.
(iterate_name_matcher): Likewise.
(decode_line_2_compare_items): Likewise.
(collect_one_symbol): Likewise.
(compare_symbols): Likewise.
(compare_msymbols): Likewise.
(add_symtabs_to_list): Likewise.
(collect_symbols): Likewise.
(compare_msyms): Likewise.
(add_minsym): Likewise.
(cleanup_linespec_result): Likewise.
* linux-fork.c (inferior_call_waitpid_cleanup): Likewise.
* linux-nat.c (delete_lwp_cleanup): Likewise.
(count_events_callback): Likewise.
(select_event_lwp_callback): Likewise.
(resume_stopped_resumed_lwps): Likewise.
* linux-tdep.c (get_linux_gdbarch_data): Likewise.
(invalidate_linux_cache_inf): Likewise.
(get_linux_inferior_data): Likewise.
(linux_find_memory_regions_thunk): Likewise.
(linux_make_mappings_callback): Likewise.
(linux_corefile_thread_callback): Likewise.
(find_mapping_size): Likewise.
* linux-thread-db.c (find_new_threads_callback): Likewise.
* lm32-tdep.c (lm32_frame_cache): Likewise.
* m2-lang.c (builtin_m2_type): Likewise.
* m32c-tdep.c (m32c_analyze_frame_prologue): Likewise.
* m32r-linux-tdep.c (m32r_linux_sigtramp_frame_cache): Likewise.
(m32r_linux_supply_gregset): Likewise.
(m32r_linux_collect_gregset): Likewise.
* m32r-tdep.c (m32r_frame_unwind_cache): Likewise.
* m68hc11-tdep.c (m68hc11_frame_unwind_cache): Likewise.
* m68k-tdep.c (m68k_frame_cache): Likewise.
* m68kbsd-tdep.c (m68kbsd_supply_fpregset): Likewise.
(m68kbsd_supply_gregset): Likewise.
* m68klinux-tdep.c (m68k_linux_sigtramp_frame_cache): Likewise.
* m88k-tdep.c (m88k_frame_cache): Likewise.
(m88k_supply_gregset): Likewise.
gdb/gdbserver/ChangeLog:
* dll.c (match_dll): Add cast(s).
(unloaded_dll): Likewise.
* linux-low.c (second_thread_of_pid_p): Likewise.
(delete_lwp_callback): Likewise.
(count_events_callback): Likewise.
(select_event_lwp_callback): Likewise.
(linux_set_resume_request): Likewise.
* server.c (accumulate_file_name_length): Likewise.
(emit_dll_description): Likewise.
(handle_qxfer_threads_worker): Likewise.
(visit_actioned_threads): Likewise.
* thread-db.c (any_thread_of): Likewise.
* tracepoint.c (same_process_p): Likewise.
(match_blocktype): Likewise.
(build_traceframe_info_xml): Likewise.
gdb/testsuite/ChangeLog:
* gdb.gdb/selftest.exp (do_steps_and_nexts): Adjust expected
source line.
2015-09-26 02:08:07 +08:00
|
|
|
btrace = (struct btrace_data *) user_data;
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
btrace->format = BTRACE_FORMAT_PT;
|
|
|
|
btrace->variant.pt.config.cpu.vendor = CV_UNKNOWN;
|
|
|
|
btrace->variant.pt.data = NULL;
|
|
|
|
btrace->variant.pt.size = 0;
|
|
|
|
}
|
|
|
|
|
2013-03-11 16:28:58 +08:00
|
|
|
static const struct gdb_xml_attribute block_attributes[] = {
|
|
|
|
{ "begin", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL },
|
|
|
|
{ "end", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL },
|
|
|
|
{ NULL, GDB_XML_AF_NONE, NULL, NULL }
|
|
|
|
};
|
|
|
|
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
static const struct gdb_xml_attribute btrace_pt_config_cpu_attributes[] = {
|
|
|
|
{ "vendor", GDB_XML_AF_NONE, NULL, NULL },
|
|
|
|
{ "family", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL },
|
|
|
|
{ "model", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL },
|
|
|
|
{ "stepping", GDB_XML_AF_NONE, gdb_xml_parse_attr_ulongest, NULL },
|
|
|
|
{ NULL, GDB_XML_AF_NONE, NULL, NULL }
|
|
|
|
};
|
|
|
|
|
|
|
|
static const struct gdb_xml_element btrace_pt_config_children[] = {
|
|
|
|
{ "cpu", btrace_pt_config_cpu_attributes, NULL, GDB_XML_EF_OPTIONAL,
|
|
|
|
parse_xml_btrace_pt_config_cpu, NULL },
|
|
|
|
{ NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
|
|
|
|
};
|
|
|
|
|
|
|
|
static const struct gdb_xml_element btrace_pt_children[] = {
|
|
|
|
{ "pt-config", NULL, btrace_pt_config_children, GDB_XML_EF_OPTIONAL, NULL,
|
|
|
|
NULL },
|
|
|
|
{ "raw", NULL, NULL, GDB_XML_EF_OPTIONAL, NULL, parse_xml_btrace_pt_raw },
|
|
|
|
{ NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
|
|
|
|
};
|
|
|
|
|
2013-03-11 16:28:58 +08:00
|
|
|
static const struct gdb_xml_attribute btrace_attributes[] = {
|
|
|
|
{ "version", GDB_XML_AF_NONE, NULL, NULL },
|
|
|
|
{ NULL, GDB_XML_AF_NONE, NULL, NULL }
|
|
|
|
};
|
|
|
|
|
|
|
|
static const struct gdb_xml_element btrace_children[] = {
|
|
|
|
{ "block", block_attributes, NULL,
|
|
|
|
GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL, parse_xml_btrace_block, NULL },
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
{ "pt", NULL, btrace_pt_children, GDB_XML_EF_OPTIONAL, parse_xml_btrace_pt,
|
|
|
|
NULL },
|
2013-03-11 16:28:58 +08:00
|
|
|
{ NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
|
|
|
|
};
|
|
|
|
|
|
|
|
static const struct gdb_xml_element btrace_elements[] = {
|
|
|
|
{ "btrace", btrace_attributes, btrace_children, GDB_XML_EF_NONE,
|
|
|
|
check_xml_btrace_version, NULL },
|
|
|
|
{ NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
|
|
|
|
};
|
|
|
|
|
|
|
|
#endif /* defined (HAVE_LIBEXPAT) */
|
|
|
|
|
|
|
|
/* See btrace.h. */
|
|
|
|
|
2013-11-13 22:31:07 +08:00
|
|
|
void
|
|
|
|
parse_xml_btrace (struct btrace_data *btrace, const char *buffer)
|
2013-03-11 16:28:58 +08:00
|
|
|
{
|
|
|
|
struct cleanup *cleanup;
|
|
|
|
int errcode;
|
|
|
|
|
|
|
|
#if defined (HAVE_LIBEXPAT)
|
|
|
|
|
2013-11-13 22:31:07 +08:00
|
|
|
btrace->format = BTRACE_FORMAT_NONE;
|
|
|
|
|
|
|
|
cleanup = make_cleanup_btrace_data (btrace);
|
2013-03-11 16:28:58 +08:00
|
|
|
errcode = gdb_xml_parse_quick (_("btrace"), "btrace.dtd", btrace_elements,
|
2013-11-13 22:31:07 +08:00
|
|
|
buffer, btrace);
|
2013-03-11 16:28:58 +08:00
|
|
|
if (errcode != 0)
|
2013-06-03 21:39:35 +08:00
|
|
|
error (_("Error parsing branch trace."));
|
2013-03-11 16:28:58 +08:00
|
|
|
|
|
|
|
/* Keep parse results. */
|
|
|
|
discard_cleanups (cleanup);
|
|
|
|
|
|
|
|
#else /* !defined (HAVE_LIBEXPAT) */
|
|
|
|
|
|
|
|
error (_("Cannot process branch trace. XML parsing is not supported."));
|
|
|
|
|
|
|
|
#endif /* !defined (HAVE_LIBEXPAT) */
|
|
|
|
}
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2013-11-28 22:44:13 +08:00
|
|
|
#if defined (HAVE_LIBEXPAT)
|
|
|
|
|
|
|
|
/* Parse a btrace-conf "bts" xml record. */
|
|
|
|
|
|
|
|
static void
|
|
|
|
parse_xml_btrace_conf_bts (struct gdb_xml_parser *parser,
|
|
|
|
const struct gdb_xml_element *element,
|
|
|
|
void *user_data, VEC (gdb_xml_value_s) *attributes)
|
|
|
|
{
|
|
|
|
struct btrace_config *conf;
|
2013-11-28 23:39:12 +08:00
|
|
|
struct gdb_xml_value *size;
|
2013-11-28 22:44:13 +08:00
|
|
|
|
Add some more casts (1/2)
Note: I needed to split this patch in two, otherwise it's too big for
the mailing list.
This patch adds explicit casts to situations where a void pointer is
assigned to a pointer to the "real" type. Building in C++ mode requires
those assignments to use an explicit cast. This includes, for example:
- callback arguments (cleanups, comparison functions, ...)
- data attached to some object (objfile, program space, etc) in the form
of a void pointer
- "user data" passed to some function
This patch comes from the commit "(mostly) auto-generated patch to insert
casts needed for C++", taken from Pedro's C++ branch.
Only files built on x86 with --enable-targets=all are modified, so the
native files for other arches will need to be dealt with separately.
I built-tested this with --enable-targets=all and reg-tested. To my
surprise, a test case (selftest.exp) had to be adjusted.
Here's the ChangeLog entry. Again, this was relatively quick to make
despite the length, thanks to David Malcom's script, although I don't
believe it's very useful information in that particular case...
gdb/ChangeLog:
* aarch64-tdep.c (aarch64_make_prologue_cache): Add cast(s).
(aarch64_make_stub_cache): Likewise.
(value_of_aarch64_user_reg): Likewise.
* ada-lang.c (ada_inferior_data_cleanup): Likewise.
(get_ada_inferior_data): Likewise.
(get_ada_pspace_data): Likewise.
(ada_pspace_data_cleanup): Likewise.
(ada_complete_symbol_matcher): Likewise.
(ada_exc_search_name_matches): Likewise.
* ada-tasks.c (get_ada_tasks_pspace_data): Likewise.
(get_ada_tasks_inferior_data): Likewise.
* addrmap.c (addrmap_mutable_foreach_worker): Likewise.
(splay_obstack_alloc): Likewise.
(splay_obstack_free): Likewise.
* alpha-linux-tdep.c (alpha_linux_supply_gregset): Likewise.
(alpha_linux_collect_gregset): Likewise.
(alpha_linux_supply_fpregset): Likewise.
(alpha_linux_collect_fpregset): Likewise.
* alpha-mdebug-tdep.c (alpha_mdebug_frame_unwind_cache): Likewise.
* alpha-tdep.c (alpha_lds): Likewise.
(alpha_sts): Likewise.
(alpha_sigtramp_frame_unwind_cache): Likewise.
(alpha_heuristic_frame_unwind_cache): Likewise.
(alpha_supply_int_regs): Likewise.
(alpha_fill_int_regs): Likewise.
(alpha_supply_fp_regs): Likewise.
(alpha_fill_fp_regs): Likewise.
* alphanbsd-tdep.c (alphanbsd_supply_fpregset): Likewise.
(alphanbsd_aout_supply_gregset): Likewise.
(alphanbsd_supply_gregset): Likewise.
* amd64-linux-tdep.c (amd64_linux_init_abi): Likewise.
(amd64_x32_linux_init_abi): Likewise.
* amd64-nat.c (amd64_supply_native_gregset): Likewise.
(amd64_collect_native_gregset): Likewise.
* amd64-tdep.c (amd64_frame_cache): Likewise.
(amd64_sigtramp_frame_cache): Likewise.
(amd64_epilogue_frame_cache): Likewise.
(amd64_supply_fxsave): Likewise.
(amd64_supply_xsave): Likewise.
(amd64_collect_fxsave): Likewise.
(amd64_collect_xsave): Likewise.
* amd64-windows-tdep.c (amd64_windows_frame_cache): Likewise.
* amd64obsd-tdep.c (amd64obsd_trapframe_cache): Likewise.
* arm-linux-tdep.c (arm_linux_supply_gregset): Likewise.
(arm_linux_collect_gregset): Likewise.
(arm_linux_supply_nwfpe): Likewise.
(arm_linux_collect_nwfpe): Likewise.
(arm_linux_supply_vfp): Likewise.
(arm_linux_collect_vfp): Likewise.
* arm-tdep.c (arm_find_mapping_symbol): Likewise.
(arm_prologue_unwind_stop_reason): Likewise.
(arm_prologue_this_id): Likewise.
(arm_prologue_prev_register): Likewise.
(arm_exidx_data_free): Likewise.
(arm_find_exidx_entry): Likewise.
(arm_stub_this_id): Likewise.
(arm_m_exception_this_id): Likewise.
(arm_m_exception_prev_register): Likewise.
(arm_normal_frame_base): Likewise.
(gdb_print_insn_arm): Likewise.
(arm_objfile_data_free): Likewise.
(arm_record_special_symbol): Likewise.
(value_of_arm_user_reg): Likewise.
* armbsd-tdep.c (armbsd_supply_fpregset): Likewise.
(armbsd_supply_gregset): Likewise.
* auto-load.c (auto_load_pspace_data_cleanup): Likewise.
(get_auto_load_pspace_data): Likewise.
(hash_loaded_script_entry): Likewise.
(eq_loaded_script_entry): Likewise.
(clear_section_scripts): Likewise.
(collect_matching_scripts): Likewise.
* auxv.c (auxv_inferior_data_cleanup): Likewise.
(get_auxv_inferior_data): Likewise.
* avr-tdep.c (avr_frame_unwind_cache): Likewise.
* ax-general.c (do_free_agent_expr_cleanup): Likewise.
* bfd-target.c (target_bfd_xfer_partial): Likewise.
(target_bfd_xclose): Likewise.
(target_bfd_get_section_table): Likewise.
* bfin-tdep.c (bfin_frame_cache): Likewise.
* block.c (find_block_in_blockvector): Likewise.
(call_site_for_pc): Likewise.
(block_find_non_opaque_type_preferred): Likewise.
* break-catch-sig.c (signal_catchpoint_insert_location): Likewise.
(signal_catchpoint_remove_location): Likewise.
(signal_catchpoint_breakpoint_hit): Likewise.
(signal_catchpoint_print_one): Likewise.
(signal_catchpoint_print_mention): Likewise.
(signal_catchpoint_print_recreate): Likewise.
* break-catch-syscall.c (get_catch_syscall_inferior_data): Likewise.
* breakpoint.c (do_cleanup_counted_command_line): Likewise.
(bp_location_compare_addrs): Likewise.
(get_first_locp_gte_addr): Likewise.
(check_tracepoint_command): Likewise.
(do_map_commands_command): Likewise.
(get_breakpoint_objfile_data): Likewise.
(free_breakpoint_probes): Likewise.
(do_captured_breakpoint_query): Likewise.
(compare_breakpoints): Likewise.
(bp_location_compare): Likewise.
(bpstat_remove_breakpoint_callback): Likewise.
(do_delete_breakpoint_cleanup): Likewise.
* bsd-uthread.c (bsd_uthread_set_supply_uthread): Likewise.
(bsd_uthread_set_collect_uthread): Likewise.
(bsd_uthread_activate): Likewise.
(bsd_uthread_fetch_registers): Likewise.
(bsd_uthread_store_registers): Likewise.
* btrace.c (check_xml_btrace_version): Likewise.
(parse_xml_btrace_block): Likewise.
(parse_xml_btrace_pt_config_cpu): Likewise.
(parse_xml_btrace_pt_raw): Likewise.
(parse_xml_btrace_pt): Likewise.
(parse_xml_btrace_conf_bts): Likewise.
(parse_xml_btrace_conf_pt): Likewise.
(do_btrace_data_cleanup): Likewise.
* c-typeprint.c (find_typedef_for_canonicalize): Likewise.
* charset.c (cleanup_iconv): Likewise.
(do_cleanup_iterator): Likewise.
* cli-out.c (cli_uiout_dtor): Likewise.
(cli_table_begin): Likewise.
(cli_table_body): Likewise.
(cli_table_end): Likewise.
(cli_table_header): Likewise.
(cli_begin): Likewise.
(cli_end): Likewise.
(cli_field_int): Likewise.
(cli_field_skip): Likewise.
(cli_field_string): Likewise.
(cli_field_fmt): Likewise.
(cli_spaces): Likewise.
(cli_text): Likewise.
(cli_message): Likewise.
(cli_wrap_hint): Likewise.
(cli_flush): Likewise.
(cli_redirect): Likewise.
(out_field_fmt): Likewise.
(field_separator): Likewise.
(cli_out_set_stream): Likewise.
* cli/cli-cmds.c (compare_symtabs): Likewise.
* cli/cli-dump.c (call_dump_func): Likewise.
(restore_section_callback): Likewise.
* cli/cli-script.c (clear_hook_in_cleanup): Likewise.
(do_restore_user_call_depth): Likewise.
(do_free_command_lines_cleanup): Likewise.
* coff-pe-read.c (get_section_vmas): Likewise.
(pe_as16): Likewise.
(pe_as32): Likewise.
* coffread.c (coff_symfile_read): Likewise.
* common/agent.c (agent_look_up_symbols): Likewise.
* common/filestuff.c (do_close_cleanup): Likewise.
* common/format.c (free_format_pieces_cleanup): Likewise.
* common/vec.c (vec_o_reserve): Likewise.
* compile/compile-c-support.c (print_one_macro): Likewise.
* compile/compile-c-symbols.c (hash_symbol_error): Likewise.
(eq_symbol_error): Likewise.
(del_symbol_error): Likewise.
(error_symbol_once): Likewise.
(gcc_convert_symbol): Likewise.
(gcc_symbol_address): Likewise.
(hash_symname): Likewise.
(eq_symname): Likewise.
* compile/compile-c-types.c (hash_type_map_instance): Likewise.
(eq_type_map_instance): Likewise.
(insert_type): Likewise.
(convert_type): Likewise.
* compile/compile-object-load.c (munmap_listp_free_cleanup): Likewise.
(setup_sections): Likewise.
(link_hash_table_free): Likewise.
(copy_sections): Likewise.
* compile/compile-object-run.c (do_module_cleanup): Likewise.
* compile/compile.c (compile_print_value): Likewise.
(do_rmdir): Likewise.
(cleanup_compile_instance): Likewise.
(cleanup_unlink_file): Likewise.
* completer.c (free_completion_tracker): Likewise.
* corelow.c (add_to_spuid_list): Likewise.
* cp-namespace.c (reset_directive_searched): Likewise.
* cp-support.c (reset_directive_searched): Likewise.
* cris-tdep.c (cris_sigtramp_frame_unwind_cache): Likewise.
(cris_frame_unwind_cache): Likewise.
* d-lang.c (builtin_d_type): Likewise.
* d-namespace.c (reset_directive_searched): Likewise.
* dbxread.c (dbx_free_symfile_info): Likewise.
(do_free_bincl_list_cleanup): Likewise.
* disasm.c (hash_dis_line_entry): Likewise.
(eq_dis_line_entry): Likewise.
(dis_asm_print_address): Likewise.
(fprintf_disasm): Likewise.
(do_ui_file_delete): Likewise.
* doublest.c (convert_floatformat_to_doublest): Likewise.
* dummy-frame.c (pop_dummy_frame_bpt): Likewise.
(dummy_frame_prev_register): Likewise.
(dummy_frame_this_id): Likewise.
* dwarf2-frame-tailcall.c (cache_hash): Likewise.
(cache_eq): Likewise.
(cache_find): Likewise.
(tailcall_frame_this_id): Likewise.
(dwarf2_tailcall_prev_register_first): Likewise.
(tailcall_frame_prev_register): Likewise.
(tailcall_frame_dealloc_cache): Likewise.
(tailcall_frame_prev_arch): Likewise.
* dwarf2-frame.c (dwarf2_frame_state_free): Likewise.
(dwarf2_frame_set_init_reg): Likewise.
(dwarf2_frame_init_reg): Likewise.
(dwarf2_frame_set_signal_frame_p): Likewise.
(dwarf2_frame_signal_frame_p): Likewise.
(dwarf2_frame_set_adjust_regnum): Likewise.
(dwarf2_frame_adjust_regnum): Likewise.
(clear_pointer_cleanup): Likewise.
(dwarf2_frame_cache): Likewise.
(find_cie): Likewise.
(dwarf2_frame_find_fde): Likewise.
* dwarf2expr.c (dwarf_expr_address_type): Likewise.
(free_dwarf_expr_context_cleanup): Likewise.
* dwarf2loc.c (locexpr_find_frame_base_location): Likewise.
(locexpr_get_frame_base): Likewise.
(loclist_find_frame_base_location): Likewise.
(loclist_get_frame_base): Likewise.
(dwarf_expr_dwarf_call): Likewise.
(dwarf_expr_get_base_type): Likewise.
(dwarf_expr_push_dwarf_reg_entry_value): Likewise.
(dwarf_expr_get_obj_addr): Likewise.
(entry_data_value_coerce_ref): Likewise.
(entry_data_value_copy_closure): Likewise.
(entry_data_value_free_closure): Likewise.
(get_frame_address_in_block_wrapper): Likewise.
(dwarf2_evaluate_property): Likewise.
(dwarf2_compile_property_to_c): Likewise.
(needs_frame_read_addr_from_reg): Likewise.
(needs_frame_get_reg_value): Likewise.
(needs_frame_frame_base): Likewise.
(needs_frame_frame_cfa): Likewise.
(needs_frame_tls_address): Likewise.
(needs_frame_dwarf_call): Likewise.
(needs_dwarf_reg_entry_value): Likewise.
(get_ax_pc): Likewise.
(locexpr_read_variable): Likewise.
(locexpr_read_variable_at_entry): Likewise.
(locexpr_read_needs_frame): Likewise.
(locexpr_describe_location): Likewise.
(locexpr_tracepoint_var_ref): Likewise.
(locexpr_generate_c_location): Likewise.
(loclist_read_variable): Likewise.
(loclist_read_variable_at_entry): Likewise.
(loclist_describe_location): Likewise.
(loclist_tracepoint_var_ref): Likewise.
(loclist_generate_c_location): Likewise.
* dwarf2read.c (line_header_hash_voidp): Likewise.
(line_header_eq_voidp): Likewise.
(dwarf2_has_info): Likewise.
(dwarf2_get_section_info): Likewise.
(locate_dwz_sections): Likewise.
(hash_file_name_entry): Likewise.
(eq_file_name_entry): Likewise.
(delete_file_name_entry): Likewise.
(dw2_setup): Likewise.
(dw2_get_file_names_reader): Likewise.
(dw2_find_pc_sect_compunit_symtab): Likewise.
(hash_signatured_type): Likewise.
(eq_signatured_type): Likewise.
(add_signatured_type_cu_to_table): Likewise.
(create_debug_types_hash_table): Likewise.
(lookup_dwo_signatured_type): Likewise.
(lookup_dwp_signatured_type): Likewise.
(lookup_signatured_type): Likewise.
(hash_type_unit_group): Likewise.
(eq_type_unit_group): Likewise.
(get_type_unit_group): Likewise.
(process_psymtab_comp_unit_reader): Likewise.
(sort_tu_by_abbrev_offset): Likewise.
(process_skeletonless_type_unit): Likewise.
(psymtabs_addrmap_cleanup): Likewise.
(dwarf2_read_symtab): Likewise.
(psymtab_to_symtab_1): Likewise.
(die_hash): Likewise.
(die_eq): Likewise.
(load_full_comp_unit_reader): Likewise.
(reset_die_in_process): Likewise.
(free_cu_line_header): Likewise.
(handle_DW_AT_stmt_list): Likewise.
(hash_dwo_file): Likewise.
(eq_dwo_file): Likewise.
(hash_dwo_unit): Likewise.
(eq_dwo_unit): Likewise.
(create_dwo_cu_reader): Likewise.
(create_dwo_unit_in_dwp_v1): Likewise.
(create_dwo_unit_in_dwp_v2): Likewise.
(lookup_dwo_unit_in_dwp): Likewise.
(dwarf2_locate_dwo_sections): Likewise.
(dwarf2_locate_common_dwp_sections): Likewise.
(dwarf2_locate_v2_dwp_sections): Likewise.
(hash_dwp_loaded_cutus): Likewise.
(eq_dwp_loaded_cutus): Likewise.
(lookup_dwo_cutu): Likewise.
(abbrev_table_free_cleanup): Likewise.
(dwarf2_free_abbrev_table): Likewise.
(find_partial_die_in_comp_unit): Likewise.
(free_line_header_voidp): Likewise.
(follow_die_offset): Likewise.
(follow_die_sig_1): Likewise.
(free_heap_comp_unit): Likewise.
(free_stack_comp_unit): Likewise.
(dwarf2_free_objfile): Likewise.
(per_cu_offset_and_type_hash): Likewise.
(per_cu_offset_and_type_eq): Likewise.
(get_die_type_at_offset): Likewise.
(partial_die_hash): Likewise.
(partial_die_eq): Likewise.
(dwarf2_per_objfile_free): Likewise.
(hash_strtab_entry): Likewise.
(eq_strtab_entry): Likewise.
(add_string): Likewise.
(hash_symtab_entry): Likewise.
(eq_symtab_entry): Likewise.
(delete_symtab_entry): Likewise.
(cleanup_mapped_symtab): Likewise.
(add_indices_to_cpool): Likewise.
(hash_psymtab_cu_index): Likewise.
(eq_psymtab_cu_index): Likewise.
(add_address_entry_worker): Likewise.
(unlink_if_set): Likewise.
(write_one_signatured_type): Likewise.
(save_gdb_index_command): Likewise.
* elfread.c (elf_symtab_read): Likewise.
(elf_gnu_ifunc_cache_hash): Likewise.
(elf_gnu_ifunc_cache_eq): Likewise.
(elf_gnu_ifunc_record_cache): Likewise.
(elf_gnu_ifunc_resolve_by_cache): Likewise.
(elf_get_probes): Likewise.
(probe_key_free): Likewise.
* f-lang.c (builtin_f_type): Likewise.
* frame-base.c (frame_base_append_sniffer): Likewise.
(frame_base_set_default): Likewise.
(frame_base_find_by_frame): Likewise.
* frame-unwind.c (frame_unwind_prepend_unwinder): Likewise.
(frame_unwind_append_unwinder): Likewise.
(frame_unwind_find_by_frame): Likewise.
* frame.c (frame_addr_hash): Likewise.
(frame_addr_hash_eq): Likewise.
(frame_stash_find): Likewise.
(do_frame_register_read): Likewise.
(unwind_to_current_frame): Likewise.
(frame_cleanup_after_sniffer): Likewise.
* frv-linux-tdep.c (frv_linux_sigtramp_frame_cache): Likewise.
* frv-tdep.c (frv_frame_unwind_cache): Likewise.
* ft32-tdep.c (ft32_frame_cache): Likewise.
* gcore.c (do_bfd_delete_cleanup): Likewise.
(gcore_create_callback): Likewise.
* gdb_bfd.c (hash_bfd): Likewise.
(eq_bfd): Likewise.
(gdb_bfd_open): Likewise.
(free_one_bfd_section): Likewise.
(gdb_bfd_ref): Likewise.
(gdb_bfd_unref): Likewise.
(get_section_descriptor): Likewise.
(gdb_bfd_map_section): Likewise.
(gdb_bfd_crc): Likewise.
(gdb_bfd_mark_parent): Likewise.
(gdb_bfd_record_inclusion): Likewise.
(gdb_bfd_requires_relocations): Likewise.
(print_one_bfd): Likewise.
* gdbtypes.c (type_pair_hash): Likewise.
(type_pair_eq): Likewise.
(builtin_type): Likewise.
(objfile_type): Likewise.
* gnu-v3-abi.c (vtable_ptrdiff_type): Likewise.
(vtable_address_point_offset): Likewise.
(gnuv3_get_vtable): Likewise.
(hash_value_and_voffset): Likewise.
(eq_value_and_voffset): Likewise.
(compare_value_and_voffset): Likewise.
(compute_vtable_size): Likewise.
(gnuv3_get_typeid_type): Likewise.
* go-lang.c (builtin_go_type): Likewise.
* guile/scm-block.c (bkscm_hash_block_smob): Likewise.
(bkscm_eq_block_smob): Likewise.
(bkscm_objfile_block_map): Likewise.
(bkscm_del_objfile_blocks): Likewise.
* guile/scm-breakpoint.c (bpscm_build_bp_list): Likewise.
* guile/scm-disasm.c (gdbscm_disasm_read_memory_worker): Likewise.
(gdbscm_disasm_print_address): Likewise.
* guile/scm-frame.c (frscm_hash_frame_smob): Likewise.
(frscm_eq_frame_smob): Likewise.
(frscm_inferior_frame_map): Likewise.
(frscm_del_inferior_frames): Likewise.
* guile/scm-gsmob.c (gdbscm_add_objfile_ref): Likewise.
* guile/scm-objfile.c (ofscm_handle_objfile_deleted): Likewise.
(ofscm_objfile_smob_from_objfile): Likewise.
* guile/scm-ports.c (ioscm_write): Likewise.
(ioscm_file_port_delete): Likewise.
(ioscm_file_port_rewind): Likewise.
(ioscm_file_port_put): Likewise.
(ioscm_file_port_write): Likewise.
* guile/scm-progspace.c (psscm_handle_pspace_deleted): Likewise.
(psscm_pspace_smob_from_pspace): Likewise.
* guile/scm-safe-call.c (scscm_recording_pre_unwind_handler): Likewise.
(scscm_recording_unwind_handler): Likewise.
(gdbscm_with_catch): Likewise.
(scscm_call_0_body): Likewise.
(scscm_call_1_body): Likewise.
(scscm_call_2_body): Likewise.
(scscm_call_3_body): Likewise.
(scscm_call_4_body): Likewise.
(scscm_apply_1_body): Likewise.
(scscm_eval_scheme_string): Likewise.
(gdbscm_safe_eval_string): Likewise.
(scscm_source_scheme_script): Likewise.
(gdbscm_safe_source_script): Likewise.
* guile/scm-string.c (gdbscm_call_scm_to_stringn): Likewise.
(gdbscm_call_scm_from_stringn): Likewise.
* guile/scm-symbol.c (syscm_hash_symbol_smob): Likewise.
(syscm_eq_symbol_smob): Likewise.
(syscm_get_symbol_map): Likewise.
(syscm_del_objfile_symbols): Likewise.
* guile/scm-symtab.c (stscm_hash_symtab_smob): Likewise.
(stscm_eq_symtab_smob): Likewise.
(stscm_objfile_symtab_map): Likewise.
(stscm_del_objfile_symtabs): Likewise.
* guile/scm-type.c (tyscm_hash_type_smob): Likewise.
(tyscm_eq_type_smob): Likewise.
(tyscm_type_map): Likewise.
(tyscm_copy_type_recursive): Likewise.
(save_objfile_types): Likewise.
* guile/scm-utils.c (extract_arg): Likewise.
* h8300-tdep.c (h8300_frame_cache): Likewise.
* hppa-linux-tdep.c (hppa_linux_sigtramp_frame_unwind_cache): Likewise.
* hppa-tdep.c (compare_unwind_entries): Likewise.
(find_unwind_entry): Likewise.
(hppa_frame_cache): Likewise.
(hppa_stub_frame_unwind_cache): Likewise.
* hppanbsd-tdep.c (hppanbsd_supply_gregset): Likewise.
* hppaobsd-tdep.c (hppaobsd_supply_gregset): Likewise.
(hppaobsd_supply_fpregset): Likewise.
* i386-cygwin-tdep.c (core_process_module_section): Likewise.
* i386-linux-tdep.c (i386_linux_init_abi): Likewise.
* i386-tdep.c (i386_frame_cache): Likewise.
(i386_epilogue_frame_cache): Likewise.
(i386_sigtramp_frame_cache): Likewise.
(i386_supply_gregset): Likewise.
(i386_collect_gregset): Likewise.
(i386_gdbarch_init): Likewise.
* i386obsd-tdep.c (i386obsd_aout_supply_regset): Likewise.
(i386obsd_trapframe_cache): Likewise.
* i387-tdep.c (i387_supply_fsave): Likewise.
(i387_collect_fsave): Likewise.
(i387_supply_fxsave): Likewise.
(i387_collect_fxsave): Likewise.
(i387_supply_xsave): Likewise.
(i387_collect_xsave): Likewise.
* ia64-tdep.c (ia64_frame_cache): Likewise.
(ia64_sigtramp_frame_cache): Likewise.
* infcmd.c (attach_command_continuation): Likewise.
(attach_command_continuation_free_args): Likewise.
* inferior.c (restore_inferior): Likewise.
(delete_thread_of_inferior): Likewise.
* inflow.c (inflow_inferior_data_cleanup): Likewise.
(get_inflow_inferior_data): Likewise.
(inflow_inferior_exit): Likewise.
* infrun.c (displaced_step_clear_cleanup): Likewise.
(restore_current_uiout_cleanup): Likewise.
(release_stop_context_cleanup): Likewise.
(do_restore_infcall_suspend_state_cleanup): Likewise.
(do_restore_infcall_control_state_cleanup): Likewise.
(restore_inferior_ptid): Likewise.
* inline-frame.c (block_starting_point_at): Likewise.
* iq2000-tdep.c (iq2000_frame_cache): Likewise.
* jit.c (get_jit_objfile_data): Likewise.
(get_jit_program_space_data): Likewise.
(jit_object_close_impl): Likewise.
(jit_find_objf_with_entry_addr): Likewise.
(jit_breakpoint_deleted): Likewise.
(jit_unwind_reg_set_impl): Likewise.
(jit_unwind_reg_get_impl): Likewise.
(jit_dealloc_cache): Likewise.
(jit_frame_sniffer): Likewise.
(jit_frame_prev_register): Likewise.
(jit_prepend_unwinder): Likewise.
(jit_inferior_exit_hook): Likewise.
(free_objfile_data): Likewise.
* jv-lang.c (jv_per_objfile_free): Likewise.
(get_dynamics_objfile): Likewise.
(get_java_class_symtab): Likewise.
(builtin_java_type): Likewise.
* language.c (language_string_char_type): Likewise.
(language_bool_type): Likewise.
(language_lookup_primitive_type): Likewise.
(language_lookup_primitive_type_as_symbol): Likewise.
* linespec.c (hash_address_entry): Likewise.
(eq_address_entry): Likewise.
(iterate_inline_only): Likewise.
(iterate_name_matcher): Likewise.
(decode_line_2_compare_items): Likewise.
(collect_one_symbol): Likewise.
(compare_symbols): Likewise.
(compare_msymbols): Likewise.
(add_symtabs_to_list): Likewise.
(collect_symbols): Likewise.
(compare_msyms): Likewise.
(add_minsym): Likewise.
(cleanup_linespec_result): Likewise.
* linux-fork.c (inferior_call_waitpid_cleanup): Likewise.
* linux-nat.c (delete_lwp_cleanup): Likewise.
(count_events_callback): Likewise.
(select_event_lwp_callback): Likewise.
(resume_stopped_resumed_lwps): Likewise.
* linux-tdep.c (get_linux_gdbarch_data): Likewise.
(invalidate_linux_cache_inf): Likewise.
(get_linux_inferior_data): Likewise.
(linux_find_memory_regions_thunk): Likewise.
(linux_make_mappings_callback): Likewise.
(linux_corefile_thread_callback): Likewise.
(find_mapping_size): Likewise.
* linux-thread-db.c (find_new_threads_callback): Likewise.
* lm32-tdep.c (lm32_frame_cache): Likewise.
* m2-lang.c (builtin_m2_type): Likewise.
* m32c-tdep.c (m32c_analyze_frame_prologue): Likewise.
* m32r-linux-tdep.c (m32r_linux_sigtramp_frame_cache): Likewise.
(m32r_linux_supply_gregset): Likewise.
(m32r_linux_collect_gregset): Likewise.
* m32r-tdep.c (m32r_frame_unwind_cache): Likewise.
* m68hc11-tdep.c (m68hc11_frame_unwind_cache): Likewise.
* m68k-tdep.c (m68k_frame_cache): Likewise.
* m68kbsd-tdep.c (m68kbsd_supply_fpregset): Likewise.
(m68kbsd_supply_gregset): Likewise.
* m68klinux-tdep.c (m68k_linux_sigtramp_frame_cache): Likewise.
* m88k-tdep.c (m88k_frame_cache): Likewise.
(m88k_supply_gregset): Likewise.
gdb/gdbserver/ChangeLog:
* dll.c (match_dll): Add cast(s).
(unloaded_dll): Likewise.
* linux-low.c (second_thread_of_pid_p): Likewise.
(delete_lwp_callback): Likewise.
(count_events_callback): Likewise.
(select_event_lwp_callback): Likewise.
(linux_set_resume_request): Likewise.
* server.c (accumulate_file_name_length): Likewise.
(emit_dll_description): Likewise.
(handle_qxfer_threads_worker): Likewise.
(visit_actioned_threads): Likewise.
* thread-db.c (any_thread_of): Likewise.
* tracepoint.c (same_process_p): Likewise.
(match_blocktype): Likewise.
(build_traceframe_info_xml): Likewise.
gdb/testsuite/ChangeLog:
* gdb.gdb/selftest.exp (do_steps_and_nexts): Adjust expected
source line.
2015-09-26 02:08:07 +08:00
|
|
|
conf = (struct btrace_config *) user_data;
|
2013-11-28 22:44:13 +08:00
|
|
|
conf->format = BTRACE_FORMAT_BTS;
|
2013-11-28 23:39:12 +08:00
|
|
|
conf->bts.size = 0;
|
|
|
|
|
|
|
|
size = xml_find_attribute (attributes, "size");
|
|
|
|
if (size != NULL)
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
conf->bts.size = (unsigned int) *(ULONGEST *) size->value;
|
2013-11-28 22:44:13 +08:00
|
|
|
}
|
|
|
|
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
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/* Parse a btrace-conf "pt" xml record. */
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static void
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parse_xml_btrace_conf_pt (struct gdb_xml_parser *parser,
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const struct gdb_xml_element *element,
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void *user_data, VEC (gdb_xml_value_s) *attributes)
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{
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struct btrace_config *conf;
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struct gdb_xml_value *size;
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Add some more casts (1/2)
Note: I needed to split this patch in two, otherwise it's too big for
the mailing list.
This patch adds explicit casts to situations where a void pointer is
assigned to a pointer to the "real" type. Building in C++ mode requires
those assignments to use an explicit cast. This includes, for example:
- callback arguments (cleanups, comparison functions, ...)
- data attached to some object (objfile, program space, etc) in the form
of a void pointer
- "user data" passed to some function
This patch comes from the commit "(mostly) auto-generated patch to insert
casts needed for C++", taken from Pedro's C++ branch.
Only files built on x86 with --enable-targets=all are modified, so the
native files for other arches will need to be dealt with separately.
I built-tested this with --enable-targets=all and reg-tested. To my
surprise, a test case (selftest.exp) had to be adjusted.
Here's the ChangeLog entry. Again, this was relatively quick to make
despite the length, thanks to David Malcom's script, although I don't
believe it's very useful information in that particular case...
gdb/ChangeLog:
* aarch64-tdep.c (aarch64_make_prologue_cache): Add cast(s).
(aarch64_make_stub_cache): Likewise.
(value_of_aarch64_user_reg): Likewise.
* ada-lang.c (ada_inferior_data_cleanup): Likewise.
(get_ada_inferior_data): Likewise.
(get_ada_pspace_data): Likewise.
(ada_pspace_data_cleanup): Likewise.
(ada_complete_symbol_matcher): Likewise.
(ada_exc_search_name_matches): Likewise.
* ada-tasks.c (get_ada_tasks_pspace_data): Likewise.
(get_ada_tasks_inferior_data): Likewise.
* addrmap.c (addrmap_mutable_foreach_worker): Likewise.
(splay_obstack_alloc): Likewise.
(splay_obstack_free): Likewise.
* alpha-linux-tdep.c (alpha_linux_supply_gregset): Likewise.
(alpha_linux_collect_gregset): Likewise.
(alpha_linux_supply_fpregset): Likewise.
(alpha_linux_collect_fpregset): Likewise.
* alpha-mdebug-tdep.c (alpha_mdebug_frame_unwind_cache): Likewise.
* alpha-tdep.c (alpha_lds): Likewise.
(alpha_sts): Likewise.
(alpha_sigtramp_frame_unwind_cache): Likewise.
(alpha_heuristic_frame_unwind_cache): Likewise.
(alpha_supply_int_regs): Likewise.
(alpha_fill_int_regs): Likewise.
(alpha_supply_fp_regs): Likewise.
(alpha_fill_fp_regs): Likewise.
* alphanbsd-tdep.c (alphanbsd_supply_fpregset): Likewise.
(alphanbsd_aout_supply_gregset): Likewise.
(alphanbsd_supply_gregset): Likewise.
* amd64-linux-tdep.c (amd64_linux_init_abi): Likewise.
(amd64_x32_linux_init_abi): Likewise.
* amd64-nat.c (amd64_supply_native_gregset): Likewise.
(amd64_collect_native_gregset): Likewise.
* amd64-tdep.c (amd64_frame_cache): Likewise.
(amd64_sigtramp_frame_cache): Likewise.
(amd64_epilogue_frame_cache): Likewise.
(amd64_supply_fxsave): Likewise.
(amd64_supply_xsave): Likewise.
(amd64_collect_fxsave): Likewise.
(amd64_collect_xsave): Likewise.
* amd64-windows-tdep.c (amd64_windows_frame_cache): Likewise.
* amd64obsd-tdep.c (amd64obsd_trapframe_cache): Likewise.
* arm-linux-tdep.c (arm_linux_supply_gregset): Likewise.
(arm_linux_collect_gregset): Likewise.
(arm_linux_supply_nwfpe): Likewise.
(arm_linux_collect_nwfpe): Likewise.
(arm_linux_supply_vfp): Likewise.
(arm_linux_collect_vfp): Likewise.
* arm-tdep.c (arm_find_mapping_symbol): Likewise.
(arm_prologue_unwind_stop_reason): Likewise.
(arm_prologue_this_id): Likewise.
(arm_prologue_prev_register): Likewise.
(arm_exidx_data_free): Likewise.
(arm_find_exidx_entry): Likewise.
(arm_stub_this_id): Likewise.
(arm_m_exception_this_id): Likewise.
(arm_m_exception_prev_register): Likewise.
(arm_normal_frame_base): Likewise.
(gdb_print_insn_arm): Likewise.
(arm_objfile_data_free): Likewise.
(arm_record_special_symbol): Likewise.
(value_of_arm_user_reg): Likewise.
* armbsd-tdep.c (armbsd_supply_fpregset): Likewise.
(armbsd_supply_gregset): Likewise.
* auto-load.c (auto_load_pspace_data_cleanup): Likewise.
(get_auto_load_pspace_data): Likewise.
(hash_loaded_script_entry): Likewise.
(eq_loaded_script_entry): Likewise.
(clear_section_scripts): Likewise.
(collect_matching_scripts): Likewise.
* auxv.c (auxv_inferior_data_cleanup): Likewise.
(get_auxv_inferior_data): Likewise.
* avr-tdep.c (avr_frame_unwind_cache): Likewise.
* ax-general.c (do_free_agent_expr_cleanup): Likewise.
* bfd-target.c (target_bfd_xfer_partial): Likewise.
(target_bfd_xclose): Likewise.
(target_bfd_get_section_table): Likewise.
* bfin-tdep.c (bfin_frame_cache): Likewise.
* block.c (find_block_in_blockvector): Likewise.
(call_site_for_pc): Likewise.
(block_find_non_opaque_type_preferred): Likewise.
* break-catch-sig.c (signal_catchpoint_insert_location): Likewise.
(signal_catchpoint_remove_location): Likewise.
(signal_catchpoint_breakpoint_hit): Likewise.
(signal_catchpoint_print_one): Likewise.
(signal_catchpoint_print_mention): Likewise.
(signal_catchpoint_print_recreate): Likewise.
* break-catch-syscall.c (get_catch_syscall_inferior_data): Likewise.
* breakpoint.c (do_cleanup_counted_command_line): Likewise.
(bp_location_compare_addrs): Likewise.
(get_first_locp_gte_addr): Likewise.
(check_tracepoint_command): Likewise.
(do_map_commands_command): Likewise.
(get_breakpoint_objfile_data): Likewise.
(free_breakpoint_probes): Likewise.
(do_captured_breakpoint_query): Likewise.
(compare_breakpoints): Likewise.
(bp_location_compare): Likewise.
(bpstat_remove_breakpoint_callback): Likewise.
(do_delete_breakpoint_cleanup): Likewise.
* bsd-uthread.c (bsd_uthread_set_supply_uthread): Likewise.
(bsd_uthread_set_collect_uthread): Likewise.
(bsd_uthread_activate): Likewise.
(bsd_uthread_fetch_registers): Likewise.
(bsd_uthread_store_registers): Likewise.
* btrace.c (check_xml_btrace_version): Likewise.
(parse_xml_btrace_block): Likewise.
(parse_xml_btrace_pt_config_cpu): Likewise.
(parse_xml_btrace_pt_raw): Likewise.
(parse_xml_btrace_pt): Likewise.
(parse_xml_btrace_conf_bts): Likewise.
(parse_xml_btrace_conf_pt): Likewise.
(do_btrace_data_cleanup): Likewise.
* c-typeprint.c (find_typedef_for_canonicalize): Likewise.
* charset.c (cleanup_iconv): Likewise.
(do_cleanup_iterator): Likewise.
* cli-out.c (cli_uiout_dtor): Likewise.
(cli_table_begin): Likewise.
(cli_table_body): Likewise.
(cli_table_end): Likewise.
(cli_table_header): Likewise.
(cli_begin): Likewise.
(cli_end): Likewise.
(cli_field_int): Likewise.
(cli_field_skip): Likewise.
(cli_field_string): Likewise.
(cli_field_fmt): Likewise.
(cli_spaces): Likewise.
(cli_text): Likewise.
(cli_message): Likewise.
(cli_wrap_hint): Likewise.
(cli_flush): Likewise.
(cli_redirect): Likewise.
(out_field_fmt): Likewise.
(field_separator): Likewise.
(cli_out_set_stream): Likewise.
* cli/cli-cmds.c (compare_symtabs): Likewise.
* cli/cli-dump.c (call_dump_func): Likewise.
(restore_section_callback): Likewise.
* cli/cli-script.c (clear_hook_in_cleanup): Likewise.
(do_restore_user_call_depth): Likewise.
(do_free_command_lines_cleanup): Likewise.
* coff-pe-read.c (get_section_vmas): Likewise.
(pe_as16): Likewise.
(pe_as32): Likewise.
* coffread.c (coff_symfile_read): Likewise.
* common/agent.c (agent_look_up_symbols): Likewise.
* common/filestuff.c (do_close_cleanup): Likewise.
* common/format.c (free_format_pieces_cleanup): Likewise.
* common/vec.c (vec_o_reserve): Likewise.
* compile/compile-c-support.c (print_one_macro): Likewise.
* compile/compile-c-symbols.c (hash_symbol_error): Likewise.
(eq_symbol_error): Likewise.
(del_symbol_error): Likewise.
(error_symbol_once): Likewise.
(gcc_convert_symbol): Likewise.
(gcc_symbol_address): Likewise.
(hash_symname): Likewise.
(eq_symname): Likewise.
* compile/compile-c-types.c (hash_type_map_instance): Likewise.
(eq_type_map_instance): Likewise.
(insert_type): Likewise.
(convert_type): Likewise.
* compile/compile-object-load.c (munmap_listp_free_cleanup): Likewise.
(setup_sections): Likewise.
(link_hash_table_free): Likewise.
(copy_sections): Likewise.
* compile/compile-object-run.c (do_module_cleanup): Likewise.
* compile/compile.c (compile_print_value): Likewise.
(do_rmdir): Likewise.
(cleanup_compile_instance): Likewise.
(cleanup_unlink_file): Likewise.
* completer.c (free_completion_tracker): Likewise.
* corelow.c (add_to_spuid_list): Likewise.
* cp-namespace.c (reset_directive_searched): Likewise.
* cp-support.c (reset_directive_searched): Likewise.
* cris-tdep.c (cris_sigtramp_frame_unwind_cache): Likewise.
(cris_frame_unwind_cache): Likewise.
* d-lang.c (builtin_d_type): Likewise.
* d-namespace.c (reset_directive_searched): Likewise.
* dbxread.c (dbx_free_symfile_info): Likewise.
(do_free_bincl_list_cleanup): Likewise.
* disasm.c (hash_dis_line_entry): Likewise.
(eq_dis_line_entry): Likewise.
(dis_asm_print_address): Likewise.
(fprintf_disasm): Likewise.
(do_ui_file_delete): Likewise.
* doublest.c (convert_floatformat_to_doublest): Likewise.
* dummy-frame.c (pop_dummy_frame_bpt): Likewise.
(dummy_frame_prev_register): Likewise.
(dummy_frame_this_id): Likewise.
* dwarf2-frame-tailcall.c (cache_hash): Likewise.
(cache_eq): Likewise.
(cache_find): Likewise.
(tailcall_frame_this_id): Likewise.
(dwarf2_tailcall_prev_register_first): Likewise.
(tailcall_frame_prev_register): Likewise.
(tailcall_frame_dealloc_cache): Likewise.
(tailcall_frame_prev_arch): Likewise.
* dwarf2-frame.c (dwarf2_frame_state_free): Likewise.
(dwarf2_frame_set_init_reg): Likewise.
(dwarf2_frame_init_reg): Likewise.
(dwarf2_frame_set_signal_frame_p): Likewise.
(dwarf2_frame_signal_frame_p): Likewise.
(dwarf2_frame_set_adjust_regnum): Likewise.
(dwarf2_frame_adjust_regnum): Likewise.
(clear_pointer_cleanup): Likewise.
(dwarf2_frame_cache): Likewise.
(find_cie): Likewise.
(dwarf2_frame_find_fde): Likewise.
* dwarf2expr.c (dwarf_expr_address_type): Likewise.
(free_dwarf_expr_context_cleanup): Likewise.
* dwarf2loc.c (locexpr_find_frame_base_location): Likewise.
(locexpr_get_frame_base): Likewise.
(loclist_find_frame_base_location): Likewise.
(loclist_get_frame_base): Likewise.
(dwarf_expr_dwarf_call): Likewise.
(dwarf_expr_get_base_type): Likewise.
(dwarf_expr_push_dwarf_reg_entry_value): Likewise.
(dwarf_expr_get_obj_addr): Likewise.
(entry_data_value_coerce_ref): Likewise.
(entry_data_value_copy_closure): Likewise.
(entry_data_value_free_closure): Likewise.
(get_frame_address_in_block_wrapper): Likewise.
(dwarf2_evaluate_property): Likewise.
(dwarf2_compile_property_to_c): Likewise.
(needs_frame_read_addr_from_reg): Likewise.
(needs_frame_get_reg_value): Likewise.
(needs_frame_frame_base): Likewise.
(needs_frame_frame_cfa): Likewise.
(needs_frame_tls_address): Likewise.
(needs_frame_dwarf_call): Likewise.
(needs_dwarf_reg_entry_value): Likewise.
(get_ax_pc): Likewise.
(locexpr_read_variable): Likewise.
(locexpr_read_variable_at_entry): Likewise.
(locexpr_read_needs_frame): Likewise.
(locexpr_describe_location): Likewise.
(locexpr_tracepoint_var_ref): Likewise.
(locexpr_generate_c_location): Likewise.
(loclist_read_variable): Likewise.
(loclist_read_variable_at_entry): Likewise.
(loclist_describe_location): Likewise.
(loclist_tracepoint_var_ref): Likewise.
(loclist_generate_c_location): Likewise.
* dwarf2read.c (line_header_hash_voidp): Likewise.
(line_header_eq_voidp): Likewise.
(dwarf2_has_info): Likewise.
(dwarf2_get_section_info): Likewise.
(locate_dwz_sections): Likewise.
(hash_file_name_entry): Likewise.
(eq_file_name_entry): Likewise.
(delete_file_name_entry): Likewise.
(dw2_setup): Likewise.
(dw2_get_file_names_reader): Likewise.
(dw2_find_pc_sect_compunit_symtab): Likewise.
(hash_signatured_type): Likewise.
(eq_signatured_type): Likewise.
(add_signatured_type_cu_to_table): Likewise.
(create_debug_types_hash_table): Likewise.
(lookup_dwo_signatured_type): Likewise.
(lookup_dwp_signatured_type): Likewise.
(lookup_signatured_type): Likewise.
(hash_type_unit_group): Likewise.
(eq_type_unit_group): Likewise.
(get_type_unit_group): Likewise.
(process_psymtab_comp_unit_reader): Likewise.
(sort_tu_by_abbrev_offset): Likewise.
(process_skeletonless_type_unit): Likewise.
(psymtabs_addrmap_cleanup): Likewise.
(dwarf2_read_symtab): Likewise.
(psymtab_to_symtab_1): Likewise.
(die_hash): Likewise.
(die_eq): Likewise.
(load_full_comp_unit_reader): Likewise.
(reset_die_in_process): Likewise.
(free_cu_line_header): Likewise.
(handle_DW_AT_stmt_list): Likewise.
(hash_dwo_file): Likewise.
(eq_dwo_file): Likewise.
(hash_dwo_unit): Likewise.
(eq_dwo_unit): Likewise.
(create_dwo_cu_reader): Likewise.
(create_dwo_unit_in_dwp_v1): Likewise.
(create_dwo_unit_in_dwp_v2): Likewise.
(lookup_dwo_unit_in_dwp): Likewise.
(dwarf2_locate_dwo_sections): Likewise.
(dwarf2_locate_common_dwp_sections): Likewise.
(dwarf2_locate_v2_dwp_sections): Likewise.
(hash_dwp_loaded_cutus): Likewise.
(eq_dwp_loaded_cutus): Likewise.
(lookup_dwo_cutu): Likewise.
(abbrev_table_free_cleanup): Likewise.
(dwarf2_free_abbrev_table): Likewise.
(find_partial_die_in_comp_unit): Likewise.
(free_line_header_voidp): Likewise.
(follow_die_offset): Likewise.
(follow_die_sig_1): Likewise.
(free_heap_comp_unit): Likewise.
(free_stack_comp_unit): Likewise.
(dwarf2_free_objfile): Likewise.
(per_cu_offset_and_type_hash): Likewise.
(per_cu_offset_and_type_eq): Likewise.
(get_die_type_at_offset): Likewise.
(partial_die_hash): Likewise.
(partial_die_eq): Likewise.
(dwarf2_per_objfile_free): Likewise.
(hash_strtab_entry): Likewise.
(eq_strtab_entry): Likewise.
(add_string): Likewise.
(hash_symtab_entry): Likewise.
(eq_symtab_entry): Likewise.
(delete_symtab_entry): Likewise.
(cleanup_mapped_symtab): Likewise.
(add_indices_to_cpool): Likewise.
(hash_psymtab_cu_index): Likewise.
(eq_psymtab_cu_index): Likewise.
(add_address_entry_worker): Likewise.
(unlink_if_set): Likewise.
(write_one_signatured_type): Likewise.
(save_gdb_index_command): Likewise.
* elfread.c (elf_symtab_read): Likewise.
(elf_gnu_ifunc_cache_hash): Likewise.
(elf_gnu_ifunc_cache_eq): Likewise.
(elf_gnu_ifunc_record_cache): Likewise.
(elf_gnu_ifunc_resolve_by_cache): Likewise.
(elf_get_probes): Likewise.
(probe_key_free): Likewise.
* f-lang.c (builtin_f_type): Likewise.
* frame-base.c (frame_base_append_sniffer): Likewise.
(frame_base_set_default): Likewise.
(frame_base_find_by_frame): Likewise.
* frame-unwind.c (frame_unwind_prepend_unwinder): Likewise.
(frame_unwind_append_unwinder): Likewise.
(frame_unwind_find_by_frame): Likewise.
* frame.c (frame_addr_hash): Likewise.
(frame_addr_hash_eq): Likewise.
(frame_stash_find): Likewise.
(do_frame_register_read): Likewise.
(unwind_to_current_frame): Likewise.
(frame_cleanup_after_sniffer): Likewise.
* frv-linux-tdep.c (frv_linux_sigtramp_frame_cache): Likewise.
* frv-tdep.c (frv_frame_unwind_cache): Likewise.
* ft32-tdep.c (ft32_frame_cache): Likewise.
* gcore.c (do_bfd_delete_cleanup): Likewise.
(gcore_create_callback): Likewise.
* gdb_bfd.c (hash_bfd): Likewise.
(eq_bfd): Likewise.
(gdb_bfd_open): Likewise.
(free_one_bfd_section): Likewise.
(gdb_bfd_ref): Likewise.
(gdb_bfd_unref): Likewise.
(get_section_descriptor): Likewise.
(gdb_bfd_map_section): Likewise.
(gdb_bfd_crc): Likewise.
(gdb_bfd_mark_parent): Likewise.
(gdb_bfd_record_inclusion): Likewise.
(gdb_bfd_requires_relocations): Likewise.
(print_one_bfd): Likewise.
* gdbtypes.c (type_pair_hash): Likewise.
(type_pair_eq): Likewise.
(builtin_type): Likewise.
(objfile_type): Likewise.
* gnu-v3-abi.c (vtable_ptrdiff_type): Likewise.
(vtable_address_point_offset): Likewise.
(gnuv3_get_vtable): Likewise.
(hash_value_and_voffset): Likewise.
(eq_value_and_voffset): Likewise.
(compare_value_and_voffset): Likewise.
(compute_vtable_size): Likewise.
(gnuv3_get_typeid_type): Likewise.
* go-lang.c (builtin_go_type): Likewise.
* guile/scm-block.c (bkscm_hash_block_smob): Likewise.
(bkscm_eq_block_smob): Likewise.
(bkscm_objfile_block_map): Likewise.
(bkscm_del_objfile_blocks): Likewise.
* guile/scm-breakpoint.c (bpscm_build_bp_list): Likewise.
* guile/scm-disasm.c (gdbscm_disasm_read_memory_worker): Likewise.
(gdbscm_disasm_print_address): Likewise.
* guile/scm-frame.c (frscm_hash_frame_smob): Likewise.
(frscm_eq_frame_smob): Likewise.
(frscm_inferior_frame_map): Likewise.
(frscm_del_inferior_frames): Likewise.
* guile/scm-gsmob.c (gdbscm_add_objfile_ref): Likewise.
* guile/scm-objfile.c (ofscm_handle_objfile_deleted): Likewise.
(ofscm_objfile_smob_from_objfile): Likewise.
* guile/scm-ports.c (ioscm_write): Likewise.
(ioscm_file_port_delete): Likewise.
(ioscm_file_port_rewind): Likewise.
(ioscm_file_port_put): Likewise.
(ioscm_file_port_write): Likewise.
* guile/scm-progspace.c (psscm_handle_pspace_deleted): Likewise.
(psscm_pspace_smob_from_pspace): Likewise.
* guile/scm-safe-call.c (scscm_recording_pre_unwind_handler): Likewise.
(scscm_recording_unwind_handler): Likewise.
(gdbscm_with_catch): Likewise.
(scscm_call_0_body): Likewise.
(scscm_call_1_body): Likewise.
(scscm_call_2_body): Likewise.
(scscm_call_3_body): Likewise.
(scscm_call_4_body): Likewise.
(scscm_apply_1_body): Likewise.
(scscm_eval_scheme_string): Likewise.
(gdbscm_safe_eval_string): Likewise.
(scscm_source_scheme_script): Likewise.
(gdbscm_safe_source_script): Likewise.
* guile/scm-string.c (gdbscm_call_scm_to_stringn): Likewise.
(gdbscm_call_scm_from_stringn): Likewise.
* guile/scm-symbol.c (syscm_hash_symbol_smob): Likewise.
(syscm_eq_symbol_smob): Likewise.
(syscm_get_symbol_map): Likewise.
(syscm_del_objfile_symbols): Likewise.
* guile/scm-symtab.c (stscm_hash_symtab_smob): Likewise.
(stscm_eq_symtab_smob): Likewise.
(stscm_objfile_symtab_map): Likewise.
(stscm_del_objfile_symtabs): Likewise.
* guile/scm-type.c (tyscm_hash_type_smob): Likewise.
(tyscm_eq_type_smob): Likewise.
(tyscm_type_map): Likewise.
(tyscm_copy_type_recursive): Likewise.
(save_objfile_types): Likewise.
* guile/scm-utils.c (extract_arg): Likewise.
* h8300-tdep.c (h8300_frame_cache): Likewise.
* hppa-linux-tdep.c (hppa_linux_sigtramp_frame_unwind_cache): Likewise.
* hppa-tdep.c (compare_unwind_entries): Likewise.
(find_unwind_entry): Likewise.
(hppa_frame_cache): Likewise.
(hppa_stub_frame_unwind_cache): Likewise.
* hppanbsd-tdep.c (hppanbsd_supply_gregset): Likewise.
* hppaobsd-tdep.c (hppaobsd_supply_gregset): Likewise.
(hppaobsd_supply_fpregset): Likewise.
* i386-cygwin-tdep.c (core_process_module_section): Likewise.
* i386-linux-tdep.c (i386_linux_init_abi): Likewise.
* i386-tdep.c (i386_frame_cache): Likewise.
(i386_epilogue_frame_cache): Likewise.
(i386_sigtramp_frame_cache): Likewise.
(i386_supply_gregset): Likewise.
(i386_collect_gregset): Likewise.
(i386_gdbarch_init): Likewise.
* i386obsd-tdep.c (i386obsd_aout_supply_regset): Likewise.
(i386obsd_trapframe_cache): Likewise.
* i387-tdep.c (i387_supply_fsave): Likewise.
(i387_collect_fsave): Likewise.
(i387_supply_fxsave): Likewise.
(i387_collect_fxsave): Likewise.
(i387_supply_xsave): Likewise.
(i387_collect_xsave): Likewise.
* ia64-tdep.c (ia64_frame_cache): Likewise.
(ia64_sigtramp_frame_cache): Likewise.
* infcmd.c (attach_command_continuation): Likewise.
(attach_command_continuation_free_args): Likewise.
* inferior.c (restore_inferior): Likewise.
(delete_thread_of_inferior): Likewise.
* inflow.c (inflow_inferior_data_cleanup): Likewise.
(get_inflow_inferior_data): Likewise.
(inflow_inferior_exit): Likewise.
* infrun.c (displaced_step_clear_cleanup): Likewise.
(restore_current_uiout_cleanup): Likewise.
(release_stop_context_cleanup): Likewise.
(do_restore_infcall_suspend_state_cleanup): Likewise.
(do_restore_infcall_control_state_cleanup): Likewise.
(restore_inferior_ptid): Likewise.
* inline-frame.c (block_starting_point_at): Likewise.
* iq2000-tdep.c (iq2000_frame_cache): Likewise.
* jit.c (get_jit_objfile_data): Likewise.
(get_jit_program_space_data): Likewise.
(jit_object_close_impl): Likewise.
(jit_find_objf_with_entry_addr): Likewise.
(jit_breakpoint_deleted): Likewise.
(jit_unwind_reg_set_impl): Likewise.
(jit_unwind_reg_get_impl): Likewise.
(jit_dealloc_cache): Likewise.
(jit_frame_sniffer): Likewise.
(jit_frame_prev_register): Likewise.
(jit_prepend_unwinder): Likewise.
(jit_inferior_exit_hook): Likewise.
(free_objfile_data): Likewise.
* jv-lang.c (jv_per_objfile_free): Likewise.
(get_dynamics_objfile): Likewise.
(get_java_class_symtab): Likewise.
(builtin_java_type): Likewise.
* language.c (language_string_char_type): Likewise.
(language_bool_type): Likewise.
(language_lookup_primitive_type): Likewise.
(language_lookup_primitive_type_as_symbol): Likewise.
* linespec.c (hash_address_entry): Likewise.
(eq_address_entry): Likewise.
(iterate_inline_only): Likewise.
(iterate_name_matcher): Likewise.
(decode_line_2_compare_items): Likewise.
(collect_one_symbol): Likewise.
(compare_symbols): Likewise.
(compare_msymbols): Likewise.
(add_symtabs_to_list): Likewise.
(collect_symbols): Likewise.
(compare_msyms): Likewise.
(add_minsym): Likewise.
(cleanup_linespec_result): Likewise.
* linux-fork.c (inferior_call_waitpid_cleanup): Likewise.
* linux-nat.c (delete_lwp_cleanup): Likewise.
(count_events_callback): Likewise.
(select_event_lwp_callback): Likewise.
(resume_stopped_resumed_lwps): Likewise.
* linux-tdep.c (get_linux_gdbarch_data): Likewise.
(invalidate_linux_cache_inf): Likewise.
(get_linux_inferior_data): Likewise.
(linux_find_memory_regions_thunk): Likewise.
(linux_make_mappings_callback): Likewise.
(linux_corefile_thread_callback): Likewise.
(find_mapping_size): Likewise.
* linux-thread-db.c (find_new_threads_callback): Likewise.
* lm32-tdep.c (lm32_frame_cache): Likewise.
* m2-lang.c (builtin_m2_type): Likewise.
* m32c-tdep.c (m32c_analyze_frame_prologue): Likewise.
* m32r-linux-tdep.c (m32r_linux_sigtramp_frame_cache): Likewise.
(m32r_linux_supply_gregset): Likewise.
(m32r_linux_collect_gregset): Likewise.
* m32r-tdep.c (m32r_frame_unwind_cache): Likewise.
* m68hc11-tdep.c (m68hc11_frame_unwind_cache): Likewise.
* m68k-tdep.c (m68k_frame_cache): Likewise.
* m68kbsd-tdep.c (m68kbsd_supply_fpregset): Likewise.
(m68kbsd_supply_gregset): Likewise.
* m68klinux-tdep.c (m68k_linux_sigtramp_frame_cache): Likewise.
* m88k-tdep.c (m88k_frame_cache): Likewise.
(m88k_supply_gregset): Likewise.
gdb/gdbserver/ChangeLog:
* dll.c (match_dll): Add cast(s).
(unloaded_dll): Likewise.
* linux-low.c (second_thread_of_pid_p): Likewise.
(delete_lwp_callback): Likewise.
(count_events_callback): Likewise.
(select_event_lwp_callback): Likewise.
(linux_set_resume_request): Likewise.
* server.c (accumulate_file_name_length): Likewise.
(emit_dll_description): Likewise.
(handle_qxfer_threads_worker): Likewise.
(visit_actioned_threads): Likewise.
* thread-db.c (any_thread_of): Likewise.
* tracepoint.c (same_process_p): Likewise.
(match_blocktype): Likewise.
(build_traceframe_info_xml): Likewise.
gdb/testsuite/ChangeLog:
* gdb.gdb/selftest.exp (do_steps_and_nexts): Adjust expected
source line.
2015-09-26 02:08:07 +08:00
|
|
|
conf = (struct btrace_config *) user_data;
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
conf->format = BTRACE_FORMAT_PT;
|
|
|
|
conf->pt.size = 0;
|
|
|
|
|
|
|
|
size = xml_find_attribute (attributes, "size");
|
|
|
|
if (size != NULL)
|
|
|
|
conf->pt.size = (unsigned int) *(ULONGEST *) size->value;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct gdb_xml_attribute btrace_conf_pt_attributes[] = {
|
|
|
|
{ "size", GDB_XML_AF_OPTIONAL, gdb_xml_parse_attr_ulongest, NULL },
|
|
|
|
{ NULL, GDB_XML_AF_NONE, NULL, NULL }
|
|
|
|
};
|
|
|
|
|
2013-11-28 23:39:12 +08:00
|
|
|
static const struct gdb_xml_attribute btrace_conf_bts_attributes[] = {
|
|
|
|
{ "size", GDB_XML_AF_OPTIONAL, gdb_xml_parse_attr_ulongest, NULL },
|
|
|
|
{ NULL, GDB_XML_AF_NONE, NULL, NULL }
|
|
|
|
};
|
|
|
|
|
2013-11-28 22:44:13 +08:00
|
|
|
static const struct gdb_xml_element btrace_conf_children[] = {
|
2013-11-28 23:39:12 +08:00
|
|
|
{ "bts", btrace_conf_bts_attributes, NULL, GDB_XML_EF_OPTIONAL,
|
|
|
|
parse_xml_btrace_conf_bts, NULL },
|
btrace: support Intel(R) Processor Trace
Adds a new command "record btrace pt" to configure the kernel to use
Intel(R) Processor Trace instead of Branch Trace Strore.
The "record btrace" command chooses the tracing format automatically.
Intel(R) Processor Trace support requires Linux 4.1 and libipt.
gdb/
* NEWS: Announce new commands "record btrace pt" and "record pt".
Announce new options "set|show record btrace pt buffer-size".
* btrace.c: Include "rsp-low.h".
Include "inttypes.h".
(btrace_add_pc): Add forward declaration.
(pt_reclassify_insn, ftrace_add_pt, btrace_pt_readmem_callback)
(pt_translate_cpu_vendor, btrace_finalize_ftrace_pt)
(btrace_compute_ftrace_pt): New.
(btrace_compute_ftrace): Support BTRACE_FORMAT_PT.
(check_xml_btrace_version): Update version check.
(parse_xml_raw, parse_xml_btrace_pt_config_cpu)
(parse_xml_btrace_pt_raw, parse_xml_btrace_pt)
(btrace_pt_config_cpu_attributes, btrace_pt_config_children)
(btrace_pt_children): New.
(btrace_children): Add support for "pt".
(parse_xml_btrace_conf_pt, btrace_conf_pt_attributes): New.
(btrace_conf_children): Add support for "pt".
* btrace.h: Include "intel-pt.h".
(btrace_pt_error): New.
* common/btrace-common.c (btrace_format_string, btrace_data_fini)
(btrace_data_empty): Support BTRACE_FORMAT_PT.
* common/btrace-common.h (btrace_format): Add BTRACE_FORMAT_PT.
(struct btrace_config_pt): New.
(struct btrace_config)<pt>: New.
(struct btrace_data_pt_config, struct btrace_data_pt): New.
(struct btrace_data)<pt>: New.
* features/btrace-conf.dtd (btrace-conf)<pt>: New.
(pt): New.
* features/btrace.dtd (btrace)<pt>: New.
(pt, pt-config, cpu): New.
* nat/linux-btrace.c (perf_event_read, perf_event_read_all)
(perf_event_pt_event_type, kernel_supports_pt)
(linux_supports_pt): New.
(linux_supports_btrace): Support BTRACE_FORMAT_PT.
(linux_enable_bts): Free tinfo on error.
(linux_enable_pt): New.
(linux_enable_btrace): Support BTRACE_FORMAT_PT.
(linux_disable_pt): New.
(linux_disable_btrace): Support BTRACE_FORMAT_PT.
(linux_fill_btrace_pt_config, linux_read_pt): New.
(linux_read_btrace): Support BTRACE_FORMAT_PT.
* nat/linux-btrace.h (struct btrace_tinfo_pt): New.
(struct btrace_target_info)<pt>: New.
* record-btrace.c (set_record_btrace_pt_cmdlist)
(show_record_btrace_pt_cmdlist): New.
(record_btrace_print_pt_conf): New.
(record_btrace_print_conf): Support BTRACE_FORMAT_PT.
(btrace_ui_out_decode_error): Support BTRACE_FORMAT_PT.
(cmd_record_btrace_pt_start): New.
(cmd_record_btrace_start): Support BTRACE_FORMAT_PT.
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): New.
(_initialize_record_btrace): Add new commands.
* remote.c (PACKET_Qbtrace_pt, PACKET_Qbtrace_conf_pt_size): New.
(remote_protocol_features): Add "Qbtrace:pt".
Add "Qbtrace-conf:pt:size".
(remote_supports_btrace): Support BTRACE_FORMAT_PT.
(btrace_sync_conf): Support PACKET_Qbtrace_conf_pt_size.
(remote_enable_btrace): Support BTRACE_FORMAT_PT.
(_initialize_remote): Add new commands.
gdbserver/
* linux-low.c: Include "rsp-low.h"
(linux_low_encode_pt_config, linux_low_encode_raw): New.
(linux_low_read_btrace): Support BTRACE_FORMAT_PT.
(linux_low_btrace_conf): Support BTRACE_FORMAT_PT.
(handle_btrace_enable_pt): New.
(handle_btrace_general_set): Support "pt".
(handle_btrace_conf_general_set): Support "pt:size".
doc/
* gdb.texinfo (Process Record and Replay): Spell out that variables
and registers are not available during btrace replay.
Describe the new "record btrace pt" command.
Describe the new "set|show record btrace pt buffer-size" options.
(General Query Packets): Describe the new Qbtrace:pt and
Qbtrace-conf:pt:size packets.
Expand "bts" to "Branch Trace Store".
Update the branch trace DTD.
2014-01-24 20:45:47 +08:00
|
|
|
{ "pt", btrace_conf_pt_attributes, NULL, GDB_XML_EF_OPTIONAL,
|
|
|
|
parse_xml_btrace_conf_pt, NULL },
|
2013-11-28 22:44:13 +08:00
|
|
|
{ NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
|
|
|
|
};
|
|
|
|
|
|
|
|
static const struct gdb_xml_attribute btrace_conf_attributes[] = {
|
|
|
|
{ "version", GDB_XML_AF_NONE, NULL, NULL },
|
|
|
|
{ NULL, GDB_XML_AF_NONE, NULL, NULL }
|
|
|
|
};
|
|
|
|
|
|
|
|
static const struct gdb_xml_element btrace_conf_elements[] = {
|
|
|
|
{ "btrace-conf", btrace_conf_attributes, btrace_conf_children,
|
|
|
|
GDB_XML_EF_NONE, NULL, NULL },
|
|
|
|
{ NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
|
|
|
|
};
|
|
|
|
|
|
|
|
#endif /* defined (HAVE_LIBEXPAT) */
|
|
|
|
|
|
|
|
/* See btrace.h. */
|
|
|
|
|
|
|
|
void
|
|
|
|
parse_xml_btrace_conf (struct btrace_config *conf, const char *xml)
|
|
|
|
{
|
|
|
|
int errcode;
|
|
|
|
|
|
|
|
#if defined (HAVE_LIBEXPAT)
|
|
|
|
|
|
|
|
errcode = gdb_xml_parse_quick (_("btrace-conf"), "btrace-conf.dtd",
|
|
|
|
btrace_conf_elements, xml, conf);
|
|
|
|
if (errcode != 0)
|
|
|
|
error (_("Error parsing branch trace configuration."));
|
|
|
|
|
|
|
|
#else /* !defined (HAVE_LIBEXPAT) */
|
|
|
|
|
|
|
|
error (_("XML parsing is not supported."));
|
|
|
|
|
|
|
|
#endif /* !defined (HAVE_LIBEXPAT) */
|
|
|
|
}
|
|
|
|
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
/* See btrace.h. */
|
|
|
|
|
|
|
|
const struct btrace_insn *
|
|
|
|
btrace_insn_get (const struct btrace_insn_iterator *it)
|
|
|
|
{
|
|
|
|
const struct btrace_function *bfun;
|
|
|
|
unsigned int index, end;
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
index = it->insn_index;
|
2017-05-30 18:47:37 +08:00
|
|
|
bfun = &it->btinfo->functions[it->call_index];
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
|
|
|
/* Check if the iterator points to a gap in the trace. */
|
|
|
|
if (bfun->errcode != 0)
|
|
|
|
return NULL;
|
|
|
|
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
/* The index is within the bounds of this function's instruction vector. */
|
btrace: Store btrace_insn in an std::vector
Because it contains a non-POD type field (flags), the type btrace_insn
should be new'ed/delete'd. Replace the VEC (btrace_insn_s) in
btrace_function with an std::vector.
gdb/ChangeLog:
* btrace.h (btrace_insn_s, DEF_VEC_O (btrace_insn_s)): Remove.
(btrace_function) <insn>: Change type to use std::vector.
* btrace.c (ftrace_debug, ftrace_call_num_insn,
ftrace_find_call, ftrace_new_gap, ftrace_update_function,
ftrace_update_insns, ftrace_compute_global_level_offset,
btrace_stitch_bts, btrace_clear, btrace_insn_get,
btrace_insn_end, btrace_insn_next, btrace_insn_prev): Adjust to
change to std::vector.
(ftrace_update_insns): Adjust to change to std::vector, change
type of INSN parameter.
(btrace_compute_ftrace_bts): Adjust call to ftrace_update_insns.
* record-btrace.c (btrace_call_history_insn_range,
btrace_compute_src_line_range,
record_btrace_frame_prev_register): Adjust to change to
std::vector.
* python/py-record-btrace.c (recpy_bt_func_instructions): Adjust
to change to std::vector.
2017-09-04 16:46:36 +08:00
|
|
|
end = bfun->insn.size ();
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
gdb_assert (0 < end);
|
|
|
|
gdb_assert (index < end);
|
|
|
|
|
btrace: Store btrace_insn in an std::vector
Because it contains a non-POD type field (flags), the type btrace_insn
should be new'ed/delete'd. Replace the VEC (btrace_insn_s) in
btrace_function with an std::vector.
gdb/ChangeLog:
* btrace.h (btrace_insn_s, DEF_VEC_O (btrace_insn_s)): Remove.
(btrace_function) <insn>: Change type to use std::vector.
* btrace.c (ftrace_debug, ftrace_call_num_insn,
ftrace_find_call, ftrace_new_gap, ftrace_update_function,
ftrace_update_insns, ftrace_compute_global_level_offset,
btrace_stitch_bts, btrace_clear, btrace_insn_get,
btrace_insn_end, btrace_insn_next, btrace_insn_prev): Adjust to
change to std::vector.
(ftrace_update_insns): Adjust to change to std::vector, change
type of INSN parameter.
(btrace_compute_ftrace_bts): Adjust call to ftrace_update_insns.
* record-btrace.c (btrace_call_history_insn_range,
btrace_compute_src_line_range,
record_btrace_frame_prev_register): Adjust to change to
std::vector.
* python/py-record-btrace.c (recpy_bt_func_instructions): Adjust
to change to std::vector.
2017-09-04 16:46:36 +08:00
|
|
|
return &bfun->insn[index];
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* See btrace.h. */
|
|
|
|
|
2016-11-21 23:39:57 +08:00
|
|
|
int
|
|
|
|
btrace_insn_get_error (const struct btrace_insn_iterator *it)
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
return it->btinfo->functions[it->call_index].errcode;
|
2016-11-21 23:39:57 +08:00
|
|
|
}
|
record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
|
|
|
|
2016-11-21 23:39:57 +08:00
|
|
|
/* See btrace.h. */
|
record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
|
|
|
|
2016-11-21 23:39:57 +08:00
|
|
|
unsigned int
|
|
|
|
btrace_insn_number (const struct btrace_insn_iterator *it)
|
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
return it->btinfo->functions[it->call_index].insn_offset + it->insn_index;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* See btrace.h. */
|
|
|
|
|
|
|
|
void
|
|
|
|
btrace_insn_begin (struct btrace_insn_iterator *it,
|
|
|
|
const struct btrace_thread_info *btinfo)
|
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
if (btinfo->functions.empty ())
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
error (_("No trace."));
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
it->btinfo = btinfo;
|
2017-05-30 18:47:37 +08:00
|
|
|
it->call_index = 0;
|
|
|
|
it->insn_index = 0;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* See btrace.h. */
|
|
|
|
|
|
|
|
void
|
|
|
|
btrace_insn_end (struct btrace_insn_iterator *it,
|
|
|
|
const struct btrace_thread_info *btinfo)
|
|
|
|
{
|
|
|
|
const struct btrace_function *bfun;
|
|
|
|
unsigned int length;
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
if (btinfo->functions.empty ())
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
error (_("No trace."));
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
bfun = &btinfo->functions.back ();
|
btrace: Store btrace_insn in an std::vector
Because it contains a non-POD type field (flags), the type btrace_insn
should be new'ed/delete'd. Replace the VEC (btrace_insn_s) in
btrace_function with an std::vector.
gdb/ChangeLog:
* btrace.h (btrace_insn_s, DEF_VEC_O (btrace_insn_s)): Remove.
(btrace_function) <insn>: Change type to use std::vector.
* btrace.c (ftrace_debug, ftrace_call_num_insn,
ftrace_find_call, ftrace_new_gap, ftrace_update_function,
ftrace_update_insns, ftrace_compute_global_level_offset,
btrace_stitch_bts, btrace_clear, btrace_insn_get,
btrace_insn_end, btrace_insn_next, btrace_insn_prev): Adjust to
change to std::vector.
(ftrace_update_insns): Adjust to change to std::vector, change
type of INSN parameter.
(btrace_compute_ftrace_bts): Adjust call to ftrace_update_insns.
* record-btrace.c (btrace_call_history_insn_range,
btrace_compute_src_line_range,
record_btrace_frame_prev_register): Adjust to change to
std::vector.
* python/py-record-btrace.c (recpy_bt_func_instructions): Adjust
to change to std::vector.
2017-09-04 16:46:36 +08:00
|
|
|
length = bfun->insn.size ();
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
|
|
|
/* The last function may either be a gap or it contains the current
|
|
|
|
instruction, which is one past the end of the execution trace; ignore
|
|
|
|
it. */
|
|
|
|
if (length > 0)
|
|
|
|
length -= 1;
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
it->btinfo = btinfo;
|
2017-05-30 18:47:37 +08:00
|
|
|
it->call_index = bfun->number - 1;
|
|
|
|
it->insn_index = length;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* See btrace.h. */
|
|
|
|
|
|
|
|
unsigned int
|
|
|
|
btrace_insn_next (struct btrace_insn_iterator *it, unsigned int stride)
|
|
|
|
{
|
|
|
|
const struct btrace_function *bfun;
|
|
|
|
unsigned int index, steps;
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
bfun = &it->btinfo->functions[it->call_index];
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
steps = 0;
|
2017-05-30 18:47:37 +08:00
|
|
|
index = it->insn_index;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
|
|
|
while (stride != 0)
|
|
|
|
{
|
|
|
|
unsigned int end, space, adv;
|
|
|
|
|
btrace: Store btrace_insn in an std::vector
Because it contains a non-POD type field (flags), the type btrace_insn
should be new'ed/delete'd. Replace the VEC (btrace_insn_s) in
btrace_function with an std::vector.
gdb/ChangeLog:
* btrace.h (btrace_insn_s, DEF_VEC_O (btrace_insn_s)): Remove.
(btrace_function) <insn>: Change type to use std::vector.
* btrace.c (ftrace_debug, ftrace_call_num_insn,
ftrace_find_call, ftrace_new_gap, ftrace_update_function,
ftrace_update_insns, ftrace_compute_global_level_offset,
btrace_stitch_bts, btrace_clear, btrace_insn_get,
btrace_insn_end, btrace_insn_next, btrace_insn_prev): Adjust to
change to std::vector.
(ftrace_update_insns): Adjust to change to std::vector, change
type of INSN parameter.
(btrace_compute_ftrace_bts): Adjust call to ftrace_update_insns.
* record-btrace.c (btrace_call_history_insn_range,
btrace_compute_src_line_range,
record_btrace_frame_prev_register): Adjust to change to
std::vector.
* python/py-record-btrace.c (recpy_bt_func_instructions): Adjust
to change to std::vector.
2017-09-04 16:46:36 +08:00
|
|
|
end = bfun->insn.size ();
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
|
|
|
/* An empty function segment represents a gap in the trace. We count
|
|
|
|
it as one instruction. */
|
|
|
|
if (end == 0)
|
|
|
|
{
|
|
|
|
const struct btrace_function *next;
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
next = ftrace_find_call_by_number (it->btinfo, bfun->number + 1);
|
record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
|
|
|
if (next == NULL)
|
|
|
|
break;
|
|
|
|
|
|
|
|
stride -= 1;
|
|
|
|
steps += 1;
|
|
|
|
|
|
|
|
bfun = next;
|
|
|
|
index = 0;
|
|
|
|
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
gdb_assert (0 < end);
|
|
|
|
gdb_assert (index < end);
|
|
|
|
|
|
|
|
/* Compute the number of instructions remaining in this segment. */
|
|
|
|
space = end - index;
|
|
|
|
|
|
|
|
/* Advance the iterator as far as possible within this segment. */
|
gdb: Use std::min and std::max throughout
Otherwise including <string> or some other C++ header is broken.
E.g.:
In file included from /opt/gcc/include/c++/7.0.0/bits/char_traits.h:39:0,
from /opt/gcc/include/c++/7.0.0/string:40,
from /home/pedro/gdb/mygit/cxx-convertion/src/gdb/infrun.c:68:
/opt/gcc/include/c++/7.0.0/bits/stl_algobase.h:243:56: error: macro "min" passed 3 arguments, but takes just 2
min(const _Tp& __a, const _Tp& __b, _Compare __comp)
^
/opt/gcc/include/c++/7.0.0/bits/stl_algobase.h:265:56: error: macro "max" passed 3 arguments, but takes just 2
max(const _Tp& __a, const _Tp& __b, _Compare __comp)
^
In file included from .../src/gdb/infrun.c:21:0:
To the best of my grepping abilities, I believe I adjusted all min/max
calls.
gdb/ChangeLog:
2016-09-16 Pedro Alves <palves@redhat.com>
* defs.h (min, max): Delete.
* aarch64-tdep.c: Include <algorithm> and use std::min and
std::max throughout.
* aarch64-tdep.c: Likewise.
* alpha-tdep.c: Likewise.
* amd64-tdep.c: Likewise.
* amd64-windows-tdep.c: Likewise.
* arm-tdep.c: Likewise.
* avr-tdep.c: Likewise.
* breakpoint.c: Likewise.
* btrace.c: Likewise.
* ctf.c: Likewise.
* disasm.c: Likewise.
* doublest.c: Likewise.
* dwarf2loc.c: Likewise.
* dwarf2read.c: Likewise.
* environ.c: Likewise.
* exec.c: Likewise.
* f-exp.y: Likewise.
* findcmd.c: Likewise.
* ft32-tdep.c: Likewise.
* gcore.c: Likewise.
* hppa-tdep.c: Likewise.
* i386-darwin-tdep.c: Likewise.
* i386-tdep.c: Likewise.
* linux-thread-db.c: Likewise.
* lm32-tdep.c: Likewise.
* m32r-tdep.c: Likewise.
* m88k-tdep.c: Likewise.
* memrange.c: Likewise.
* minidebug.c: Likewise.
* mips-tdep.c: Likewise.
* moxie-tdep.c: Likewise.
* nds32-tdep.c: Likewise.
* nios2-tdep.c: Likewise.
* nto-procfs.c: Likewise.
* parse.c: Likewise.
* ppc-sysv-tdep.c: Likewise.
* probe.c: Likewise.
* record-btrace.c: Likewise.
* remote.c: Likewise.
* rs6000-tdep.c: Likewise.
* rx-tdep.c: Likewise.
* s390-linux-nat.c: Likewise.
* s390-linux-tdep.c: Likewise.
* ser-tcp.c: Likewise.
* sh-tdep.c: Likewise.
* sh64-tdep.c: Likewise.
* source.c: Likewise.
* sparc-tdep.c: Likewise.
* symfile.c: Likewise.
* target-memory.c: Likewise.
* target.c: Likewise.
* tic6x-tdep.c: Likewise.
* tilegx-tdep.c: Likewise.
* tracefile-tfile.c: Likewise.
* tracepoint.c: Likewise.
* valprint.c: Likewise.
* value.c: Likewise.
* xtensa-tdep.c: Likewise.
* cli/cli-cmds.c: Likewise.
* compile/compile-object-load.c: Likewise.
2016-09-17 02:55:17 +08:00
|
|
|
adv = std::min (space, stride);
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
stride -= adv;
|
|
|
|
index += adv;
|
|
|
|
steps += adv;
|
|
|
|
|
|
|
|
/* Move to the next function if we're at the end of this one. */
|
|
|
|
if (index == end)
|
|
|
|
{
|
|
|
|
const struct btrace_function *next;
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
next = ftrace_find_call_by_number (it->btinfo, bfun->number + 1);
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
if (next == NULL)
|
|
|
|
{
|
|
|
|
/* We stepped past the last function.
|
|
|
|
|
|
|
|
Let's adjust the index to point to the last instruction in
|
|
|
|
the previous function. */
|
|
|
|
index -= 1;
|
|
|
|
steps -= 1;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* We now point to the first instruction in the new function. */
|
|
|
|
bfun = next;
|
|
|
|
index = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* We did make progress. */
|
|
|
|
gdb_assert (adv > 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Update the iterator. */
|
2017-05-30 18:47:37 +08:00
|
|
|
it->call_index = bfun->number - 1;
|
|
|
|
it->insn_index = index;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
|
|
|
return steps;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* See btrace.h. */
|
|
|
|
|
|
|
|
unsigned int
|
|
|
|
btrace_insn_prev (struct btrace_insn_iterator *it, unsigned int stride)
|
|
|
|
{
|
|
|
|
const struct btrace_function *bfun;
|
|
|
|
unsigned int index, steps;
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
bfun = &it->btinfo->functions[it->call_index];
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
steps = 0;
|
2017-05-30 18:47:37 +08:00
|
|
|
index = it->insn_index;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
|
|
|
while (stride != 0)
|
|
|
|
{
|
|
|
|
unsigned int adv;
|
|
|
|
|
|
|
|
/* Move to the previous function if we're at the start of this one. */
|
|
|
|
if (index == 0)
|
|
|
|
{
|
|
|
|
const struct btrace_function *prev;
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
prev = ftrace_find_call_by_number (it->btinfo, bfun->number - 1);
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
if (prev == NULL)
|
|
|
|
break;
|
|
|
|
|
|
|
|
/* We point to one after the last instruction in the new function. */
|
|
|
|
bfun = prev;
|
btrace: Store btrace_insn in an std::vector
Because it contains a non-POD type field (flags), the type btrace_insn
should be new'ed/delete'd. Replace the VEC (btrace_insn_s) in
btrace_function with an std::vector.
gdb/ChangeLog:
* btrace.h (btrace_insn_s, DEF_VEC_O (btrace_insn_s)): Remove.
(btrace_function) <insn>: Change type to use std::vector.
* btrace.c (ftrace_debug, ftrace_call_num_insn,
ftrace_find_call, ftrace_new_gap, ftrace_update_function,
ftrace_update_insns, ftrace_compute_global_level_offset,
btrace_stitch_bts, btrace_clear, btrace_insn_get,
btrace_insn_end, btrace_insn_next, btrace_insn_prev): Adjust to
change to std::vector.
(ftrace_update_insns): Adjust to change to std::vector, change
type of INSN parameter.
(btrace_compute_ftrace_bts): Adjust call to ftrace_update_insns.
* record-btrace.c (btrace_call_history_insn_range,
btrace_compute_src_line_range,
record_btrace_frame_prev_register): Adjust to change to
std::vector.
* python/py-record-btrace.c (recpy_bt_func_instructions): Adjust
to change to std::vector.
2017-09-04 16:46:36 +08:00
|
|
|
index = bfun->insn.size ();
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
|
|
|
/* An empty function segment represents a gap in the trace. We count
|
|
|
|
it as one instruction. */
|
|
|
|
if (index == 0)
|
|
|
|
{
|
|
|
|
stride -= 1;
|
|
|
|
steps += 1;
|
|
|
|
|
|
|
|
continue;
|
|
|
|
}
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Advance the iterator as far as possible within this segment. */
|
gdb: Use std::min and std::max throughout
Otherwise including <string> or some other C++ header is broken.
E.g.:
In file included from /opt/gcc/include/c++/7.0.0/bits/char_traits.h:39:0,
from /opt/gcc/include/c++/7.0.0/string:40,
from /home/pedro/gdb/mygit/cxx-convertion/src/gdb/infrun.c:68:
/opt/gcc/include/c++/7.0.0/bits/stl_algobase.h:243:56: error: macro "min" passed 3 arguments, but takes just 2
min(const _Tp& __a, const _Tp& __b, _Compare __comp)
^
/opt/gcc/include/c++/7.0.0/bits/stl_algobase.h:265:56: error: macro "max" passed 3 arguments, but takes just 2
max(const _Tp& __a, const _Tp& __b, _Compare __comp)
^
In file included from .../src/gdb/infrun.c:21:0:
To the best of my grepping abilities, I believe I adjusted all min/max
calls.
gdb/ChangeLog:
2016-09-16 Pedro Alves <palves@redhat.com>
* defs.h (min, max): Delete.
* aarch64-tdep.c: Include <algorithm> and use std::min and
std::max throughout.
* aarch64-tdep.c: Likewise.
* alpha-tdep.c: Likewise.
* amd64-tdep.c: Likewise.
* amd64-windows-tdep.c: Likewise.
* arm-tdep.c: Likewise.
* avr-tdep.c: Likewise.
* breakpoint.c: Likewise.
* btrace.c: Likewise.
* ctf.c: Likewise.
* disasm.c: Likewise.
* doublest.c: Likewise.
* dwarf2loc.c: Likewise.
* dwarf2read.c: Likewise.
* environ.c: Likewise.
* exec.c: Likewise.
* f-exp.y: Likewise.
* findcmd.c: Likewise.
* ft32-tdep.c: Likewise.
* gcore.c: Likewise.
* hppa-tdep.c: Likewise.
* i386-darwin-tdep.c: Likewise.
* i386-tdep.c: Likewise.
* linux-thread-db.c: Likewise.
* lm32-tdep.c: Likewise.
* m32r-tdep.c: Likewise.
* m88k-tdep.c: Likewise.
* memrange.c: Likewise.
* minidebug.c: Likewise.
* mips-tdep.c: Likewise.
* moxie-tdep.c: Likewise.
* nds32-tdep.c: Likewise.
* nios2-tdep.c: Likewise.
* nto-procfs.c: Likewise.
* parse.c: Likewise.
* ppc-sysv-tdep.c: Likewise.
* probe.c: Likewise.
* record-btrace.c: Likewise.
* remote.c: Likewise.
* rs6000-tdep.c: Likewise.
* rx-tdep.c: Likewise.
* s390-linux-nat.c: Likewise.
* s390-linux-tdep.c: Likewise.
* ser-tcp.c: Likewise.
* sh-tdep.c: Likewise.
* sh64-tdep.c: Likewise.
* source.c: Likewise.
* sparc-tdep.c: Likewise.
* symfile.c: Likewise.
* target-memory.c: Likewise.
* target.c: Likewise.
* tic6x-tdep.c: Likewise.
* tilegx-tdep.c: Likewise.
* tracefile-tfile.c: Likewise.
* tracepoint.c: Likewise.
* valprint.c: Likewise.
* value.c: Likewise.
* xtensa-tdep.c: Likewise.
* cli/cli-cmds.c: Likewise.
* compile/compile-object-load.c: Likewise.
2016-09-17 02:55:17 +08:00
|
|
|
adv = std::min (index, stride);
|
record-btrace: indicate gaps
Indicate gaps in the trace due to decode errors. Internally, a gap is
represented as a btrace function segment without instructions and with a
non-zero format-specific error code.
Show the gap when traversing the instruction or function call history.
Also indicate gaps in "info record".
It looks like this:
(gdb) info record
Active record target: record-btrace
Recording format: Branch Trace Store.
Buffer size: 64KB.
Recorded 32 instructions in 5 functions (1 gaps) for thread 1 (process 7182).
(gdb) record function-call-history /cli
1 fib inst 1,9 at src/fib.c:9,14
2 fib inst 10,20 at src/fib.c:6,14
3 [decode error (1): instruction overflow]
4 fib inst 21,28 at src/fib.c:11,14
5 fib inst 29,33 at src/fib.c:6,9
(gdb) record instruction-history 20,22
20 0x000000000040062f <fib+47>: sub $0x1,%rax
[decode error (1): instruction overflow]
21 0x0000000000400613 <fib+19>: add $0x1,%rax
22 0x0000000000400617 <fib+23>: mov %rax,0x200a3a(%rip)
(gdb)
Gaps are ignored during reverse execution and replay.
2015-02-09 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_find_call): Skip gaps.
(ftrace_new_function): Initialize level.
(ftrace_new_call, ftrace_new_tailcall, ftrace_new_return)
(ftrace_new_switch): Update
level computation.
(ftrace_new_gap): New.
(ftrace_update_function): Create new function after gap.
(btrace_compute_ftrace_bts): Create gap on error.
(btrace_stitch_bts): Update parameters. Clear trace if it
becomes empty.
(btrace_stitch_trace): Update parameters. Update callers.
(btrace_clear): Reset the number of gaps.
(btrace_insn_get): Return NULL if the iterator points to a gap.
(btrace_insn_number): Return zero if the iterator points to a gap.
(btrace_insn_end): Allow gaps at the end.
(btrace_insn_next, btrace_insn_prev, btrace_insn_cmp): Handle gaps.
(btrace_find_insn_by_number): Assert that the found iterator does
not point to a gap.
(btrace_call_next, btrace_call_prev): Assert that the last function
is not a gap.
* btrace.h (btrace_bts_error): New.
(btrace_function): Update comment.
(btrace_function) <insn, insn_offset, number>: Update comment.
(btrace_function) <errcode>: New.
(btrace_thread_info) <ngaps>: New.
(btrace_thread_info) <replay>: Update comment.
(btrace_insn_get): Update comment.
* record-btrace.c (btrace_ui_out_decode_error): New.
(record_btrace_info): Print number of gaps.
(btrace_insn_history, btrace_call_history): Call
btrace_ui_out_decode_error for gaps.
(record_btrace_step_thread, record_btrace_start_replaying): Skip gaps.
testsuite/
* gdb.btrace/buffer-size.exp: Update "info record" output.
* gdb.btrace/delta.exp: Update "info record" output.
* gdb.btrace/enable.exp: Update "info record" output.
* gdb.btrace/finish.exp: Update "info record" output.
* gdb.btrace/instruction_history.exp: Update "info record" output.
* gdb.btrace/next.exp: Update "info record" output.
* gdb.btrace/nexti.exp: Update "info record" output.
* gdb.btrace/step.exp: Update "info record" output.
* gdb.btrace/stepi.exp: Update "info record" output.
* gdb.btrace/nohist.exp: Update "info record" output.
2014-01-30 16:51:10 +08:00
|
|
|
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
stride -= adv;
|
|
|
|
index -= adv;
|
|
|
|
steps += adv;
|
|
|
|
|
|
|
|
/* We did make progress. */
|
|
|
|
gdb_assert (adv > 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Update the iterator. */
|
2017-05-30 18:47:37 +08:00
|
|
|
it->call_index = bfun->number - 1;
|
|
|
|
it->insn_index = index;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
|
|
|
return steps;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* See btrace.h. */
|
|
|
|
|
|
|
|
int
|
|
|
|
btrace_insn_cmp (const struct btrace_insn_iterator *lhs,
|
|
|
|
const struct btrace_insn_iterator *rhs)
|
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
gdb_assert (lhs->btinfo == rhs->btinfo);
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
if (lhs->call_index != rhs->call_index)
|
|
|
|
return lhs->call_index - rhs->call_index;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
return lhs->insn_index - rhs->insn_index;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* See btrace.h. */
|
|
|
|
|
|
|
|
int
|
|
|
|
btrace_find_insn_by_number (struct btrace_insn_iterator *it,
|
|
|
|
const struct btrace_thread_info *btinfo,
|
|
|
|
unsigned int number)
|
|
|
|
{
|
|
|
|
const struct btrace_function *bfun;
|
2016-11-21 23:39:57 +08:00
|
|
|
unsigned int upper, lower;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
if (btinfo->functions.empty ())
|
2016-11-21 23:39:57 +08:00
|
|
|
return 0;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2016-11-21 23:39:57 +08:00
|
|
|
lower = 0;
|
2017-05-30 18:47:37 +08:00
|
|
|
bfun = &btinfo->functions[lower];
|
2016-11-21 23:39:57 +08:00
|
|
|
if (number < bfun->insn_offset)
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
return 0;
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
upper = btinfo->functions.size () - 1;
|
2017-05-30 18:47:37 +08:00
|
|
|
bfun = &btinfo->functions[upper];
|
2016-11-21 23:39:57 +08:00
|
|
|
if (number >= bfun->insn_offset + ftrace_call_num_insn (bfun))
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
return 0;
|
|
|
|
|
2016-11-21 23:39:57 +08:00
|
|
|
/* We assume that there are no holes in the numbering. */
|
|
|
|
for (;;)
|
|
|
|
{
|
|
|
|
const unsigned int average = lower + (upper - lower) / 2;
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
bfun = &btinfo->functions[average];
|
2016-11-21 23:39:57 +08:00
|
|
|
|
|
|
|
if (number < bfun->insn_offset)
|
|
|
|
{
|
|
|
|
upper = average - 1;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (number >= bfun->insn_offset + ftrace_call_num_insn (bfun))
|
|
|
|
{
|
|
|
|
lower = average + 1;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
it->btinfo = btinfo;
|
2017-05-30 18:47:37 +08:00
|
|
|
it->call_index = bfun->number - 1;
|
|
|
|
it->insn_index = number - bfun->insn_offset;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
/* Returns true if the recording ends with a function segment that
|
|
|
|
contains only a single (i.e. the current) instruction. */
|
|
|
|
|
|
|
|
static bool
|
|
|
|
btrace_ends_with_single_insn (const struct btrace_thread_info *btinfo)
|
|
|
|
{
|
|
|
|
const btrace_function *bfun;
|
|
|
|
|
|
|
|
if (btinfo->functions.empty ())
|
|
|
|
return false;
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
bfun = &btinfo->functions.back ();
|
2017-05-30 18:47:37 +08:00
|
|
|
if (bfun->errcode != 0)
|
|
|
|
return false;
|
|
|
|
|
|
|
|
return ftrace_call_num_insn (bfun) == 1;
|
|
|
|
}
|
|
|
|
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
/* See btrace.h. */
|
|
|
|
|
|
|
|
const struct btrace_function *
|
|
|
|
btrace_call_get (const struct btrace_call_iterator *it)
|
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
if (it->index >= it->btinfo->functions.size ())
|
|
|
|
return NULL;
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
return &it->btinfo->functions[it->index];
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* See btrace.h. */
|
|
|
|
|
|
|
|
unsigned int
|
|
|
|
btrace_call_number (const struct btrace_call_iterator *it)
|
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
const unsigned int length = it->btinfo->functions.size ();
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
/* If the last function segment contains only a single instruction (i.e. the
|
|
|
|
current instruction), skip it. */
|
|
|
|
if ((it->index == length) && btrace_ends_with_single_insn (it->btinfo))
|
|
|
|
return length;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
return it->index + 1;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* See btrace.h. */
|
|
|
|
|
|
|
|
void
|
|
|
|
btrace_call_begin (struct btrace_call_iterator *it,
|
|
|
|
const struct btrace_thread_info *btinfo)
|
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
if (btinfo->functions.empty ())
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
error (_("No trace."));
|
|
|
|
|
|
|
|
it->btinfo = btinfo;
|
2017-05-30 18:47:37 +08:00
|
|
|
it->index = 0;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* See btrace.h. */
|
|
|
|
|
|
|
|
void
|
|
|
|
btrace_call_end (struct btrace_call_iterator *it,
|
|
|
|
const struct btrace_thread_info *btinfo)
|
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
if (btinfo->functions.empty ())
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
error (_("No trace."));
|
|
|
|
|
|
|
|
it->btinfo = btinfo;
|
2017-05-30 18:47:37 +08:00
|
|
|
it->index = btinfo->functions.size ();
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* See btrace.h. */
|
|
|
|
|
|
|
|
unsigned int
|
|
|
|
btrace_call_next (struct btrace_call_iterator *it, unsigned int stride)
|
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
const unsigned int length = it->btinfo->functions.size ();
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
if (it->index + stride < length - 1)
|
|
|
|
/* Default case: Simply advance the iterator. */
|
|
|
|
it->index += stride;
|
|
|
|
else if (it->index + stride == length - 1)
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
/* We land exactly at the last function segment. If it contains only one
|
|
|
|
instruction (i.e. the current instruction) it is not actually part of
|
|
|
|
the trace. */
|
|
|
|
if (btrace_ends_with_single_insn (it->btinfo))
|
|
|
|
it->index = length;
|
|
|
|
else
|
|
|
|
it->index = length - 1;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
/* We land past the last function segment and have to adjust the stride.
|
|
|
|
If the last function segment contains only one instruction (i.e. the
|
|
|
|
current instruction) it is not actually part of the trace. */
|
|
|
|
if (btrace_ends_with_single_insn (it->btinfo))
|
|
|
|
stride = length - it->index - 1;
|
|
|
|
else
|
|
|
|
stride = length - it->index;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
it->index = length;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
}
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
return stride;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* See btrace.h. */
|
|
|
|
|
|
|
|
unsigned int
|
|
|
|
btrace_call_prev (struct btrace_call_iterator *it, unsigned int stride)
|
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
const unsigned int length = it->btinfo->functions.size ();
|
|
|
|
int steps = 0;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
gdb_assert (it->index <= length);
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
if (stride == 0 || it->index == 0)
|
|
|
|
return 0;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
/* If we are at the end, the first step is a special case. If the last
|
|
|
|
function segment contains only one instruction (i.e. the current
|
|
|
|
instruction) it is not actually part of the trace. To be able to step
|
|
|
|
over this instruction, we need at least one more function segment. */
|
|
|
|
if ((it->index == length) && (length > 1))
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
if (btrace_ends_with_single_insn (it->btinfo))
|
|
|
|
it->index = length - 2;
|
|
|
|
else
|
|
|
|
it->index = length - 1;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
steps = 1;
|
|
|
|
stride -= 1;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
}
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
stride = std::min (stride, it->index);
|
|
|
|
|
|
|
|
it->index -= stride;
|
|
|
|
return steps + stride;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* See btrace.h. */
|
|
|
|
|
|
|
|
int
|
|
|
|
btrace_call_cmp (const struct btrace_call_iterator *lhs,
|
|
|
|
const struct btrace_call_iterator *rhs)
|
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
gdb_assert (lhs->btinfo == rhs->btinfo);
|
|
|
|
return (int) (lhs->index - rhs->index);
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* See btrace.h. */
|
|
|
|
|
|
|
|
int
|
|
|
|
btrace_find_call_by_number (struct btrace_call_iterator *it,
|
|
|
|
const struct btrace_thread_info *btinfo,
|
|
|
|
unsigned int number)
|
|
|
|
{
|
2017-05-30 18:47:37 +08:00
|
|
|
const unsigned int length = btinfo->functions.size ();
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
if ((number == 0) || (number > length))
|
|
|
|
return 0;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
it->btinfo = btinfo;
|
|
|
|
it->index = number - 1;
|
|
|
|
return 1;
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* See btrace.h. */
|
|
|
|
|
|
|
|
void
|
|
|
|
btrace_set_insn_history (struct btrace_thread_info *btinfo,
|
|
|
|
const struct btrace_insn_iterator *begin,
|
|
|
|
const struct btrace_insn_iterator *end)
|
|
|
|
{
|
|
|
|
if (btinfo->insn_history == NULL)
|
Replace some xmalloc-family functions with XNEW-family ones
This patch is part of the make-gdb-buildable-in-C++ effort. The idea is
to change some calls to the xmalloc family of functions to calls to the
equivalents in the XNEW family. This avoids adding an explicit cast, so
it keeps the code a bit more readable. Some of them also map relatively
well to a C++ equivalent (XNEW (struct foo) -> new foo), so it will be
possible to do scripted replacements if needed.
I only changed calls that were obviously allocating memory for one or
multiple "objects". Allocation of variable sizes (such as strings or
buffer handling) will be for later (and won't use XNEW).
- xmalloc (sizeof (struct foo)) -> XNEW (struct foo)
- xmalloc (num * sizeof (struct foo)) -> XNEWVEC (struct foo, num)
- xcalloc (1, sizeof (struct foo)) -> XCNEW (struct foo)
- xcalloc (num, sizeof (struct foo)) -> XCNEWVEC (struct foo, num)
- xrealloc (p, num * sizeof (struct foo) -> XRESIZEVEC (struct foo, p, num)
- obstack_alloc (ob, sizeof (struct foo)) -> XOBNEW (ob, struct foo)
- obstack_alloc (ob, num * sizeof (struct foo)) -> XOBNEWVEC (ob, struct foo, num)
- alloca (sizeof (struct foo)) -> XALLOCA (struct foo)
- alloca (num * sizeof (struct foo)) -> XALLOCAVEC (struct foo, num)
Some instances of xmalloc followed by memset to zero the buffer were
replaced by XCNEW or XCNEWVEC.
I regtested on x86-64, Ubuntu 14.04, but the patch touches many
architecture-specific files. For those I'll have to rely on the
buildbot or people complaining that I broke their gdb.
gdb/ChangeLog:
* aarch64-linux-nat.c (aarch64_add_process): Likewise.
* aarch64-tdep.c (aarch64_gdbarch_init): Likewise.
* ada-exp.y (write_ambiguous_var): Likewise.
* ada-lang.c (resolve_subexp): Likewise.
(user_select_syms): Likewise.
(assign_aggregate): Likewise.
(ada_evaluate_subexp): Likewise.
(cache_symbol): Likewise.
* addrmap.c (allocate_key): Likewise.
(addrmap_create_mutable): Likewise.
* aix-thread.c (sync_threadlists): Likewise.
* alpha-tdep.c (alpha_push_dummy_call): Likewise.
(alpha_gdbarch_init): Likewise.
* amd64-windows-tdep.c (amd64_windows_push_arguments): Likewise.
* arm-linux-nat.c (arm_linux_add_process): Likewise.
* arm-linux-tdep.c (arm_linux_displaced_step_copy_insn): Likewise.
* arm-tdep.c (push_stack_item): Likewise.
(arm_displaced_step_copy_insn): Likewise.
(arm_gdbarch_init): Likewise.
(_initialize_arm_tdep): Likewise.
* avr-tdep.c (push_stack_item): Likewise.
* ax-general.c (new_agent_expr): Likewise.
* block.c (block_initialize_namespace): Likewise.
* breakpoint.c (alloc_counted_command_line): Likewise.
(update_dprintf_command_list): Likewise.
(parse_breakpoint_sals): Likewise.
(decode_static_tracepoint_spec): Likewise.
(until_break_command): Likewise.
(clear_command): Likewise.
(update_global_location_list): Likewise.
(get_breakpoint_objfile_data) Likewise.
* btrace.c (ftrace_new_function): Likewise.
(btrace_set_insn_history): Likewise.
(btrace_set_call_history): Likewise.
* buildsym.c (add_symbol_to_list): Likewise.
(record_pending_block): Likewise.
(start_subfile): Likewise.
(start_buildsym_compunit): Likewise.
(push_subfile): Likewise.
(end_symtab_get_static_block): Likewise.
(buildsym_init): Likewise.
* cli/cli-cmds.c (source_command): Likewise.
* cli/cli-decode.c (add_cmd): Likewise.
* cli/cli-script.c (build_command_line): Likewise.
(setup_user_args): Likewise.
(realloc_body_list): Likewise.
(process_next_line): Likewise.
(copy_command_lines): Likewise.
* cli/cli-setshow.c (do_set_command): Likewise.
* coff-pe-read.c (read_pe_exported_syms): Likewise.
* coffread.c (coff_locate_sections): Likewise.
(coff_symtab_read): Likewise.
(coff_read_struct_type): Likewise.
* common/cleanups.c (make_my_cleanup2): Likewise.
* common/common-exceptions.c (throw_it): Likewise.
* common/filestuff.c (make_cleanup_close): Likewise.
* common/format.c (parse_format_string): Likewise.
* common/queue.h (DEFINE_QUEUE_P): Likewise.
* compile/compile-object-load.c (munmap_list_add): Likewise.
(compile_object_load): Likewise.
* compile/compile-object-run.c (compile_object_run): Likewise.
* compile/compile.c (append_args): Likewise.
* corefile.c (specify_exec_file_hook): Likewise.
* cp-support.c (make_symbol_overload_list): Likewise.
* cris-tdep.c (push_stack_item): Likewise.
(cris_gdbarch_init): Likewise.
* ctf.c (ctf_trace_file_writer_new): Likewise.
* dbxread.c (init_header_files): Likewise.
(add_new_header_file): Likewise.
(init_bincl_list): Likewise.
(dbx_end_psymtab): Likewise.
(start_psymtab): Likewise.
(dbx_end_psymtab): Likewise.
* dcache.c (dcache_init): Likewise.
* dictionary.c (dict_create_hashed): Likewise.
(dict_create_hashed_expandable): Likewise.
(dict_create_linear): Likewise.
(dict_create_linear_expandable): Likewise.
* dtrace-probe.c (dtrace_process_dof_probe): Likewise.
* dummy-frame.c (register_dummy_frame_dtor): Likewise.
* dwarf2-frame-tailcall.c (cache_new_ref1): Likewise.
* dwarf2-frame.c (dwarf2_build_frame_info): Likewise.
(decode_frame_entry_1): Likewise.
* dwarf2expr.c (new_dwarf_expr_context): Likewise.
* dwarf2loc.c (dwarf2_compile_expr_to_ax): Likewise.
* dwarf2read.c (dwarf2_has_info): Likewise.
(create_signatured_type_table_from_index): Likewise.
(dwarf2_read_index): Likewise.
(dw2_get_file_names_reader): Likewise.
(create_all_type_units): Likewise.
(read_cutu_die_from_dwo): Likewise.
(init_tu_and_read_dwo_dies): Likewise.
(init_cutu_and_read_dies): Likewise.
(create_all_comp_units): Likewise.
(queue_comp_unit): Likewise.
(inherit_abstract_dies): Likewise.
(read_call_site_scope): Likewise.
(dwarf2_add_field): Likewise.
(dwarf2_add_typedef): Likewise.
(dwarf2_add_member_fn): Likewise.
(attr_to_dynamic_prop): Likewise.
(abbrev_table_alloc_abbrev): Likewise.
(abbrev_table_read_table): Likewise.
(add_include_dir): Likewise.
(add_file_name): Likewise.
(dwarf_decode_line_header): Likewise.
(dwarf2_const_value_attr): Likewise.
(dwarf_alloc_block): Likewise.
(parse_macro_definition): Likewise.
(set_die_type): Likewise.
(write_psymtabs_to_index): Likewise.
(create_cus_from_index): Likewise.
(dwarf2_create_include_psymtab): Likewise.
(process_psymtab_comp_unit_reader): Likewise.
(build_type_psymtab_dependencies): Likewise.
(read_comp_units_from_section): Likewise.
(compute_compunit_symtab_includes): Likewise.
(create_dwo_unit_in_dwp_v1): Likewise.
(create_dwo_unit_in_dwp_v2): Likewise.
(read_func_scope): Likewise.
(process_structure_scope): Likewise.
(mark_common_block_symbol_computed): Likewise.
(load_partial_dies): Likewise.
(dwarf2_symbol_mark_computed): Likewise.
* elfread.c (elf_symfile_segments): Likewise.
(elf_read_minimal_symbols): Likewise.
* environ.c (make_environ): Likewise.
* eval.c (evaluate_subexp_standard): Likewise.
* event-loop.c (create_file_handler): Likewise.
(create_async_signal_handler): Likewise.
(create_async_event_handler): Likewise.
(create_timer): Likewise.
* exec.c (build_section_table): Likewise.
* fbsd-nat.c (fbsd_remember_child): Likewise.
* fork-child.c (fork_inferior): Likewise.
* frv-tdep.c (new_variant): Likewise.
* gdbarch.sh (gdbarch_alloc): Likewise.
(append_name): Likewise.
* gdbtypes.c (rank_function): Likewise.
(copy_type_recursive): Likewise.
(add_dyn_prop): Likewise.
* gnu-nat.c (make_proc): Likewise.
(make_inf): Likewise.
(gnu_write_inferior): Likewise.
* gnu-v3-abi.c (build_gdb_vtable_type): Likewise.
(build_std_type_info_type): Likewise.
* guile/scm-param.c (compute_enum_list): Likewise.
* guile/scm-utils.c (gdbscm_parse_function_args): Likewise.
* guile/scm-value.c (gdbscm_value_call): Likewise.
* h8300-tdep.c (h8300_gdbarch_init): Likewise.
* hppa-tdep.c (hppa_init_objfile_priv_data): Likewise.
(read_unwind_info): Likewise.
* ia64-tdep.c (ia64_gdbarch_init): Likewise.
* infcall.c (dummy_frame_context_saver_setup): Likewise.
(call_function_by_hand_dummy): Likewise.
* infcmd.c (step_once): Likewise.
(finish_forward): Likewise.
(attach_command): Likewise.
(notice_new_inferior): Likewise.
* inferior.c (add_inferior_silent): Likewise.
* infrun.c (add_displaced_stepping_state): Likewise.
(save_infcall_control_state): Likewise.
(save_inferior_ptid): Likewise.
(_initialize_infrun): Likewise.
* jit.c (bfd_open_from_target_memory): Likewise.
(jit_gdbarch_data_init): Likewise.
* language.c (add_language): Likewise.
* linespec.c (decode_line_2): Likewise.
* linux-nat.c (add_to_pid_list): Likewise.
(add_initial_lwp): Likewise.
* linux-thread-db.c (add_thread_db_info): Likewise.
(record_thread): Likewise.
(info_auto_load_libthread_db): Likewise.
* m32c-tdep.c (m32c_gdbarch_init): Likewise.
* m68hc11-tdep.c (m68hc11_gdbarch_init): Likewise.
* m68k-tdep.c (m68k_gdbarch_init): Likewise.
* m88k-tdep.c (m88k_analyze_prologue): Likewise.
* macrocmd.c (macro_define_command): Likewise.
* macroexp.c (gather_arguments): Likewise.
* macroscope.c (sal_macro_scope): Likewise.
* macrotab.c (new_macro_table): Likewise.
* mdebugread.c (push_parse_stack): Likewise.
(parse_partial_symbols): Likewise.
(parse_symbol): Likewise.
(psymtab_to_symtab_1): Likewise.
(new_block): Likewise.
(new_psymtab): Likewise.
(mdebug_build_psymtabs): Likewise.
(add_pending): Likewise.
(elfmdebug_build_psymtabs): Likewise.
* mep-tdep.c (mep_gdbarch_init): Likewise.
* mi/mi-main.c (mi_execute_command): Likewise.
* mi/mi-parse.c (mi_parse_argv): Likewise.
* minidebug.c (lzma_open): Likewise.
* minsyms.c (terminate_minimal_symbol_table): Likewise.
* mips-linux-nat.c (mips_linux_insert_watchpoint): Likewise.
* mips-tdep.c (mips_gdbarch_init): Likewise.
* mn10300-tdep.c (mn10300_gdbarch_init): Likewise.
* msp430-tdep.c (msp430_gdbarch_init): Likewise.
* mt-tdep.c (mt_registers_info): Likewise.
* nat/aarch64-linux.c (aarch64_linux_new_thread): Likewise.
* nat/linux-btrace.c (linux_enable_bts): Likewise.
(linux_enable_pt): Likewise.
* nat/linux-osdata.c (linux_xfer_osdata_processes): Likewise.
(linux_xfer_osdata_processgroups): Likewise.
* nios2-tdep.c (nios2_gdbarch_init): Likewise.
* nto-procfs.c (procfs_meminfo): Likewise.
* objc-lang.c (start_msglist): Likewise.
(selectors_info): Likewise.
(classes_info): Likewise.
(find_methods): Likewise.
* objfiles.c (allocate_objfile): Likewise.
(update_section_map): Likewise.
* osabi.c (gdbarch_register_osabi): Likewise.
(gdbarch_register_osabi_sniffer): Likewise.
* parse.c (start_arglist): Likewise.
* ppc-linux-nat.c (hwdebug_find_thread_points_by_tid): Likewise.
(hwdebug_insert_point): Likewise.
* printcmd.c (display_command): Likewise.
(ui_printf): Likewise.
* procfs.c (create_procinfo): Likewise.
(load_syscalls): Likewise.
(proc_get_LDT_entry): Likewise.
(proc_update_threads): Likewise.
* prologue-value.c (make_pv_area): Likewise.
(pv_area_store): Likewise.
* psymtab.c (extend_psymbol_list): Likewise.
(init_psymbol_list): Likewise.
(allocate_psymtab): Likewise.
* python/py-inferior.c (add_thread_object): Likewise.
* python/py-param.c (compute_enum_values): Likewise.
* python/py-value.c (valpy_call): Likewise.
* python/py-varobj.c (py_varobj_iter_next): Likewise.
* python/python.c (ensure_python_env): Likewise.
* record-btrace.c (record_btrace_start_replaying): Likewise.
* record-full.c (record_full_reg_alloc): Likewise.
(record_full_mem_alloc): Likewise.
(record_full_end_alloc): Likewise.
(record_full_core_xfer_partial): Likewise.
* regcache.c (get_thread_arch_aspace_regcache): Likewise.
* remote-fileio.c (remote_fileio_init_fd_map): Likewise.
* remote-notif.c (remote_notif_state_allocate): Likewise.
* remote.c (demand_private_info): Likewise.
(remote_notif_stop_alloc_reply): Likewise.
(remote_enable_btrace): Likewise.
* reverse.c (save_bookmark_command): Likewise.
* rl78-tdep.c (rl78_gdbarch_init): Likewise.
* rx-tdep.c (rx_gdbarch_init): Likewise.
* s390-linux-nat.c (s390_insert_watchpoint): Likewise.
* ser-go32.c (dos_get_tty_state): Likewise.
(dos_copy_tty_state): Likewise.
* ser-mingw.c (ser_windows_open): Likewise.
(ser_console_wait_handle): Likewise.
(ser_console_get_tty_state): Likewise.
(make_pipe_state): Likewise.
(net_windows_open): Likewise.
* ser-unix.c (hardwire_get_tty_state): Likewise.
(hardwire_copy_tty_state): Likewise.
* solib-aix.c (solib_aix_new_lm_info): Likewise.
* solib-dsbt.c (dsbt_current_sos): Likewise.
(dsbt_relocate_main_executable): Likewise.
* solib-frv.c (frv_current_sos): Likewise.
(frv_relocate_main_executable): Likewise.
* solib-spu.c (spu_bfd_fopen): Likewise.
* solib-svr4.c (lm_info_read): Likewise.
(svr4_copy_library_list): Likewise.
(svr4_default_sos): Likewise.
* source.c (find_source_lines): Likewise.
(line_info): Likewise.
(add_substitute_path_rule): Likewise.
* spu-linux-nat.c (spu_bfd_open): Likewise.
* spu-tdep.c (info_spu_dma_cmdlist): Likewise.
* stabsread.c (dbx_lookup_type): Likewise.
(read_type): Likewise.
(read_member_functions): Likewise.
(read_struct_fields): Likewise.
(read_baseclasses): Likewise.
(read_args): Likewise.
(_initialize_stabsread): Likewise.
* stack.c (func_command): Likewise.
* stap-probe.c (handle_stap_probe): Likewise.
* symfile.c (addrs_section_sort): Likewise.
(addr_info_make_relative): Likewise.
(load_section_callback): Likewise.
(add_symbol_file_command): Likewise.
(init_filename_language_table): Likewise.
* symtab.c (create_filename_seen_cache): Likewise.
(sort_search_symbols_remove_dups): Likewise.
(search_symbols): Likewise.
* target.c (make_cleanup_restore_target_terminal): Likewise.
* thread.c (new_thread): Likewise.
(enable_thread_stack_temporaries): Likewise.
(make_cleanup_restore_current_thread): Likewise.
(thread_apply_all_command): Likewise.
* tic6x-tdep.c (tic6x_gdbarch_init): Likewise.
* top.c (gdb_readline_wrapper): Likewise.
* tracefile-tfile.c (tfile_trace_file_writer_new): Likewise.
* tracepoint.c (trace_find_line_command): Likewise.
(all_tracepoint_actions_and_cleanup): Likewise.
(make_cleanup_restore_current_traceframe): Likewise.
(get_uploaded_tp): Likewise.
(get_uploaded_tsv): Likewise.
* tui/tui-data.c (tui_alloc_generic_win_info): Likewise.
(tui_alloc_win_info): Likewise.
(tui_alloc_content): Likewise.
(tui_add_content_elements): Likewise.
* tui/tui-disasm.c (tui_find_disassembly_address): Likewise.
(tui_set_disassem_content): Likewise.
* ui-file.c (ui_file_new): Likewise.
(stdio_file_new): Likewise.
(tee_file_new): Likewise.
* utils.c (make_cleanup_restore_integer): Likewise.
(add_internal_problem_command): Likewise.
* v850-tdep.c (v850_gdbarch_init): Likewise.
* valops.c (find_oload_champ): Likewise.
* value.c (allocate_value_lazy): Likewise.
(record_latest_value): Likewise.
(create_internalvar): Likewise.
* varobj.c (install_variable): Likewise.
(new_variable): Likewise.
(new_root_variable): Likewise.
(cppush): Likewise.
(_initialize_varobj): Likewise.
* windows-nat.c (windows_make_so): Likewise.
* x86-nat.c (x86_add_process): Likewise.
* xcoffread.c (arrange_linetable): Likewise.
(allocate_include_entry): Likewise.
(process_linenos): Likewise.
(SYMBOL_DUP): Likewise.
(xcoff_start_psymtab): Likewise.
(xcoff_end_psymtab): Likewise.
* xml-support.c (gdb_xml_parse_attr_ulongest): Likewise.
* xtensa-tdep.c (xtensa_register_type): Likewise.
* gdbarch.c: Regenerate.
* gdbarch.h: Regenerate.
gdb/gdbserver/ChangeLog:
* ax.c (gdb_parse_agent_expr): Likewise.
(compile_bytecodes): Likewise.
* dll.c (loaded_dll): Likewise.
* event-loop.c (append_callback_event): Likewise.
(create_file_handler): Likewise.
(create_file_event): Likewise.
* hostio.c (handle_open): Likewise.
* inferiors.c (add_thread): Likewise.
(add_process): Likewise.
* linux-aarch64-low.c (aarch64_linux_new_process): Likewise.
* linux-arm-low.c (arm_new_process): Likewise.
(arm_new_thread): Likewise.
* linux-low.c (add_to_pid_list): Likewise.
(linux_add_process): Likewise.
(handle_extended_wait): Likewise.
(add_lwp): Likewise.
(enqueue_one_deferred_signal): Likewise.
(enqueue_pending_signal): Likewise.
(linux_resume_one_lwp_throw): Likewise.
(linux_resume_one_thread): Likewise.
(linux_read_memory): Likewise.
(linux_write_memory): Likewise.
* linux-mips-low.c (mips_linux_new_process): Likewise.
(mips_linux_new_thread): Likewise.
(mips_add_watchpoint): Likewise.
* linux-x86-low.c (initialize_low_arch): Likewise.
* lynx-low.c (lynx_add_process): Likewise.
* mem-break.c (set_raw_breakpoint_at): Likewise.
(set_breakpoint): Likewise.
(add_condition_to_breakpoint): Likewise.
(add_commands_to_breakpoint): Likewise.
(clone_agent_expr): Likewise.
(clone_one_breakpoint): Likewise.
* regcache.c (new_register_cache): Likewise.
* remote-utils.c (look_up_one_symbol): Likewise.
* server.c (queue_stop_reply): Likewise.
(start_inferior): Likewise.
(queue_stop_reply_callback): Likewise.
(handle_target_event): Likewise.
* spu-low.c (fetch_ppc_memory): Likewise.
(store_ppc_memory): Likewise.
* target.c (set_target_ops): Likewise.
* thread-db.c (thread_db_load_search): Likewise.
(try_thread_db_load_1): Likewise.
* tracepoint.c (add_tracepoint): Likewise.
(add_tracepoint_action): Likewise.
(create_trace_state_variable): Likewise.
(cmd_qtdpsrc): Likewise.
(cmd_qtro): Likewise.
(add_while_stepping_state): Likewise.
* win32-low.c (child_add_thread): Likewise.
(get_image_name): Likewise.
2015-08-27 05:16:07 +08:00
|
|
|
btinfo->insn_history = XCNEW (struct btrace_insn_history);
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
|
|
|
btinfo->insn_history->begin = *begin;
|
|
|
|
btinfo->insn_history->end = *end;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* See btrace.h. */
|
|
|
|
|
|
|
|
void
|
|
|
|
btrace_set_call_history (struct btrace_thread_info *btinfo,
|
|
|
|
const struct btrace_call_iterator *begin,
|
|
|
|
const struct btrace_call_iterator *end)
|
|
|
|
{
|
|
|
|
gdb_assert (begin->btinfo == end->btinfo);
|
|
|
|
|
|
|
|
if (btinfo->call_history == NULL)
|
Replace some xmalloc-family functions with XNEW-family ones
This patch is part of the make-gdb-buildable-in-C++ effort. The idea is
to change some calls to the xmalloc family of functions to calls to the
equivalents in the XNEW family. This avoids adding an explicit cast, so
it keeps the code a bit more readable. Some of them also map relatively
well to a C++ equivalent (XNEW (struct foo) -> new foo), so it will be
possible to do scripted replacements if needed.
I only changed calls that were obviously allocating memory for one or
multiple "objects". Allocation of variable sizes (such as strings or
buffer handling) will be for later (and won't use XNEW).
- xmalloc (sizeof (struct foo)) -> XNEW (struct foo)
- xmalloc (num * sizeof (struct foo)) -> XNEWVEC (struct foo, num)
- xcalloc (1, sizeof (struct foo)) -> XCNEW (struct foo)
- xcalloc (num, sizeof (struct foo)) -> XCNEWVEC (struct foo, num)
- xrealloc (p, num * sizeof (struct foo) -> XRESIZEVEC (struct foo, p, num)
- obstack_alloc (ob, sizeof (struct foo)) -> XOBNEW (ob, struct foo)
- obstack_alloc (ob, num * sizeof (struct foo)) -> XOBNEWVEC (ob, struct foo, num)
- alloca (sizeof (struct foo)) -> XALLOCA (struct foo)
- alloca (num * sizeof (struct foo)) -> XALLOCAVEC (struct foo, num)
Some instances of xmalloc followed by memset to zero the buffer were
replaced by XCNEW or XCNEWVEC.
I regtested on x86-64, Ubuntu 14.04, but the patch touches many
architecture-specific files. For those I'll have to rely on the
buildbot or people complaining that I broke their gdb.
gdb/ChangeLog:
* aarch64-linux-nat.c (aarch64_add_process): Likewise.
* aarch64-tdep.c (aarch64_gdbarch_init): Likewise.
* ada-exp.y (write_ambiguous_var): Likewise.
* ada-lang.c (resolve_subexp): Likewise.
(user_select_syms): Likewise.
(assign_aggregate): Likewise.
(ada_evaluate_subexp): Likewise.
(cache_symbol): Likewise.
* addrmap.c (allocate_key): Likewise.
(addrmap_create_mutable): Likewise.
* aix-thread.c (sync_threadlists): Likewise.
* alpha-tdep.c (alpha_push_dummy_call): Likewise.
(alpha_gdbarch_init): Likewise.
* amd64-windows-tdep.c (amd64_windows_push_arguments): Likewise.
* arm-linux-nat.c (arm_linux_add_process): Likewise.
* arm-linux-tdep.c (arm_linux_displaced_step_copy_insn): Likewise.
* arm-tdep.c (push_stack_item): Likewise.
(arm_displaced_step_copy_insn): Likewise.
(arm_gdbarch_init): Likewise.
(_initialize_arm_tdep): Likewise.
* avr-tdep.c (push_stack_item): Likewise.
* ax-general.c (new_agent_expr): Likewise.
* block.c (block_initialize_namespace): Likewise.
* breakpoint.c (alloc_counted_command_line): Likewise.
(update_dprintf_command_list): Likewise.
(parse_breakpoint_sals): Likewise.
(decode_static_tracepoint_spec): Likewise.
(until_break_command): Likewise.
(clear_command): Likewise.
(update_global_location_list): Likewise.
(get_breakpoint_objfile_data) Likewise.
* btrace.c (ftrace_new_function): Likewise.
(btrace_set_insn_history): Likewise.
(btrace_set_call_history): Likewise.
* buildsym.c (add_symbol_to_list): Likewise.
(record_pending_block): Likewise.
(start_subfile): Likewise.
(start_buildsym_compunit): Likewise.
(push_subfile): Likewise.
(end_symtab_get_static_block): Likewise.
(buildsym_init): Likewise.
* cli/cli-cmds.c (source_command): Likewise.
* cli/cli-decode.c (add_cmd): Likewise.
* cli/cli-script.c (build_command_line): Likewise.
(setup_user_args): Likewise.
(realloc_body_list): Likewise.
(process_next_line): Likewise.
(copy_command_lines): Likewise.
* cli/cli-setshow.c (do_set_command): Likewise.
* coff-pe-read.c (read_pe_exported_syms): Likewise.
* coffread.c (coff_locate_sections): Likewise.
(coff_symtab_read): Likewise.
(coff_read_struct_type): Likewise.
* common/cleanups.c (make_my_cleanup2): Likewise.
* common/common-exceptions.c (throw_it): Likewise.
* common/filestuff.c (make_cleanup_close): Likewise.
* common/format.c (parse_format_string): Likewise.
* common/queue.h (DEFINE_QUEUE_P): Likewise.
* compile/compile-object-load.c (munmap_list_add): Likewise.
(compile_object_load): Likewise.
* compile/compile-object-run.c (compile_object_run): Likewise.
* compile/compile.c (append_args): Likewise.
* corefile.c (specify_exec_file_hook): Likewise.
* cp-support.c (make_symbol_overload_list): Likewise.
* cris-tdep.c (push_stack_item): Likewise.
(cris_gdbarch_init): Likewise.
* ctf.c (ctf_trace_file_writer_new): Likewise.
* dbxread.c (init_header_files): Likewise.
(add_new_header_file): Likewise.
(init_bincl_list): Likewise.
(dbx_end_psymtab): Likewise.
(start_psymtab): Likewise.
(dbx_end_psymtab): Likewise.
* dcache.c (dcache_init): Likewise.
* dictionary.c (dict_create_hashed): Likewise.
(dict_create_hashed_expandable): Likewise.
(dict_create_linear): Likewise.
(dict_create_linear_expandable): Likewise.
* dtrace-probe.c (dtrace_process_dof_probe): Likewise.
* dummy-frame.c (register_dummy_frame_dtor): Likewise.
* dwarf2-frame-tailcall.c (cache_new_ref1): Likewise.
* dwarf2-frame.c (dwarf2_build_frame_info): Likewise.
(decode_frame_entry_1): Likewise.
* dwarf2expr.c (new_dwarf_expr_context): Likewise.
* dwarf2loc.c (dwarf2_compile_expr_to_ax): Likewise.
* dwarf2read.c (dwarf2_has_info): Likewise.
(create_signatured_type_table_from_index): Likewise.
(dwarf2_read_index): Likewise.
(dw2_get_file_names_reader): Likewise.
(create_all_type_units): Likewise.
(read_cutu_die_from_dwo): Likewise.
(init_tu_and_read_dwo_dies): Likewise.
(init_cutu_and_read_dies): Likewise.
(create_all_comp_units): Likewise.
(queue_comp_unit): Likewise.
(inherit_abstract_dies): Likewise.
(read_call_site_scope): Likewise.
(dwarf2_add_field): Likewise.
(dwarf2_add_typedef): Likewise.
(dwarf2_add_member_fn): Likewise.
(attr_to_dynamic_prop): Likewise.
(abbrev_table_alloc_abbrev): Likewise.
(abbrev_table_read_table): Likewise.
(add_include_dir): Likewise.
(add_file_name): Likewise.
(dwarf_decode_line_header): Likewise.
(dwarf2_const_value_attr): Likewise.
(dwarf_alloc_block): Likewise.
(parse_macro_definition): Likewise.
(set_die_type): Likewise.
(write_psymtabs_to_index): Likewise.
(create_cus_from_index): Likewise.
(dwarf2_create_include_psymtab): Likewise.
(process_psymtab_comp_unit_reader): Likewise.
(build_type_psymtab_dependencies): Likewise.
(read_comp_units_from_section): Likewise.
(compute_compunit_symtab_includes): Likewise.
(create_dwo_unit_in_dwp_v1): Likewise.
(create_dwo_unit_in_dwp_v2): Likewise.
(read_func_scope): Likewise.
(process_structure_scope): Likewise.
(mark_common_block_symbol_computed): Likewise.
(load_partial_dies): Likewise.
(dwarf2_symbol_mark_computed): Likewise.
* elfread.c (elf_symfile_segments): Likewise.
(elf_read_minimal_symbols): Likewise.
* environ.c (make_environ): Likewise.
* eval.c (evaluate_subexp_standard): Likewise.
* event-loop.c (create_file_handler): Likewise.
(create_async_signal_handler): Likewise.
(create_async_event_handler): Likewise.
(create_timer): Likewise.
* exec.c (build_section_table): Likewise.
* fbsd-nat.c (fbsd_remember_child): Likewise.
* fork-child.c (fork_inferior): Likewise.
* frv-tdep.c (new_variant): Likewise.
* gdbarch.sh (gdbarch_alloc): Likewise.
(append_name): Likewise.
* gdbtypes.c (rank_function): Likewise.
(copy_type_recursive): Likewise.
(add_dyn_prop): Likewise.
* gnu-nat.c (make_proc): Likewise.
(make_inf): Likewise.
(gnu_write_inferior): Likewise.
* gnu-v3-abi.c (build_gdb_vtable_type): Likewise.
(build_std_type_info_type): Likewise.
* guile/scm-param.c (compute_enum_list): Likewise.
* guile/scm-utils.c (gdbscm_parse_function_args): Likewise.
* guile/scm-value.c (gdbscm_value_call): Likewise.
* h8300-tdep.c (h8300_gdbarch_init): Likewise.
* hppa-tdep.c (hppa_init_objfile_priv_data): Likewise.
(read_unwind_info): Likewise.
* ia64-tdep.c (ia64_gdbarch_init): Likewise.
* infcall.c (dummy_frame_context_saver_setup): Likewise.
(call_function_by_hand_dummy): Likewise.
* infcmd.c (step_once): Likewise.
(finish_forward): Likewise.
(attach_command): Likewise.
(notice_new_inferior): Likewise.
* inferior.c (add_inferior_silent): Likewise.
* infrun.c (add_displaced_stepping_state): Likewise.
(save_infcall_control_state): Likewise.
(save_inferior_ptid): Likewise.
(_initialize_infrun): Likewise.
* jit.c (bfd_open_from_target_memory): Likewise.
(jit_gdbarch_data_init): Likewise.
* language.c (add_language): Likewise.
* linespec.c (decode_line_2): Likewise.
* linux-nat.c (add_to_pid_list): Likewise.
(add_initial_lwp): Likewise.
* linux-thread-db.c (add_thread_db_info): Likewise.
(record_thread): Likewise.
(info_auto_load_libthread_db): Likewise.
* m32c-tdep.c (m32c_gdbarch_init): Likewise.
* m68hc11-tdep.c (m68hc11_gdbarch_init): Likewise.
* m68k-tdep.c (m68k_gdbarch_init): Likewise.
* m88k-tdep.c (m88k_analyze_prologue): Likewise.
* macrocmd.c (macro_define_command): Likewise.
* macroexp.c (gather_arguments): Likewise.
* macroscope.c (sal_macro_scope): Likewise.
* macrotab.c (new_macro_table): Likewise.
* mdebugread.c (push_parse_stack): Likewise.
(parse_partial_symbols): Likewise.
(parse_symbol): Likewise.
(psymtab_to_symtab_1): Likewise.
(new_block): Likewise.
(new_psymtab): Likewise.
(mdebug_build_psymtabs): Likewise.
(add_pending): Likewise.
(elfmdebug_build_psymtabs): Likewise.
* mep-tdep.c (mep_gdbarch_init): Likewise.
* mi/mi-main.c (mi_execute_command): Likewise.
* mi/mi-parse.c (mi_parse_argv): Likewise.
* minidebug.c (lzma_open): Likewise.
* minsyms.c (terminate_minimal_symbol_table): Likewise.
* mips-linux-nat.c (mips_linux_insert_watchpoint): Likewise.
* mips-tdep.c (mips_gdbarch_init): Likewise.
* mn10300-tdep.c (mn10300_gdbarch_init): Likewise.
* msp430-tdep.c (msp430_gdbarch_init): Likewise.
* mt-tdep.c (mt_registers_info): Likewise.
* nat/aarch64-linux.c (aarch64_linux_new_thread): Likewise.
* nat/linux-btrace.c (linux_enable_bts): Likewise.
(linux_enable_pt): Likewise.
* nat/linux-osdata.c (linux_xfer_osdata_processes): Likewise.
(linux_xfer_osdata_processgroups): Likewise.
* nios2-tdep.c (nios2_gdbarch_init): Likewise.
* nto-procfs.c (procfs_meminfo): Likewise.
* objc-lang.c (start_msglist): Likewise.
(selectors_info): Likewise.
(classes_info): Likewise.
(find_methods): Likewise.
* objfiles.c (allocate_objfile): Likewise.
(update_section_map): Likewise.
* osabi.c (gdbarch_register_osabi): Likewise.
(gdbarch_register_osabi_sniffer): Likewise.
* parse.c (start_arglist): Likewise.
* ppc-linux-nat.c (hwdebug_find_thread_points_by_tid): Likewise.
(hwdebug_insert_point): Likewise.
* printcmd.c (display_command): Likewise.
(ui_printf): Likewise.
* procfs.c (create_procinfo): Likewise.
(load_syscalls): Likewise.
(proc_get_LDT_entry): Likewise.
(proc_update_threads): Likewise.
* prologue-value.c (make_pv_area): Likewise.
(pv_area_store): Likewise.
* psymtab.c (extend_psymbol_list): Likewise.
(init_psymbol_list): Likewise.
(allocate_psymtab): Likewise.
* python/py-inferior.c (add_thread_object): Likewise.
* python/py-param.c (compute_enum_values): Likewise.
* python/py-value.c (valpy_call): Likewise.
* python/py-varobj.c (py_varobj_iter_next): Likewise.
* python/python.c (ensure_python_env): Likewise.
* record-btrace.c (record_btrace_start_replaying): Likewise.
* record-full.c (record_full_reg_alloc): Likewise.
(record_full_mem_alloc): Likewise.
(record_full_end_alloc): Likewise.
(record_full_core_xfer_partial): Likewise.
* regcache.c (get_thread_arch_aspace_regcache): Likewise.
* remote-fileio.c (remote_fileio_init_fd_map): Likewise.
* remote-notif.c (remote_notif_state_allocate): Likewise.
* remote.c (demand_private_info): Likewise.
(remote_notif_stop_alloc_reply): Likewise.
(remote_enable_btrace): Likewise.
* reverse.c (save_bookmark_command): Likewise.
* rl78-tdep.c (rl78_gdbarch_init): Likewise.
* rx-tdep.c (rx_gdbarch_init): Likewise.
* s390-linux-nat.c (s390_insert_watchpoint): Likewise.
* ser-go32.c (dos_get_tty_state): Likewise.
(dos_copy_tty_state): Likewise.
* ser-mingw.c (ser_windows_open): Likewise.
(ser_console_wait_handle): Likewise.
(ser_console_get_tty_state): Likewise.
(make_pipe_state): Likewise.
(net_windows_open): Likewise.
* ser-unix.c (hardwire_get_tty_state): Likewise.
(hardwire_copy_tty_state): Likewise.
* solib-aix.c (solib_aix_new_lm_info): Likewise.
* solib-dsbt.c (dsbt_current_sos): Likewise.
(dsbt_relocate_main_executable): Likewise.
* solib-frv.c (frv_current_sos): Likewise.
(frv_relocate_main_executable): Likewise.
* solib-spu.c (spu_bfd_fopen): Likewise.
* solib-svr4.c (lm_info_read): Likewise.
(svr4_copy_library_list): Likewise.
(svr4_default_sos): Likewise.
* source.c (find_source_lines): Likewise.
(line_info): Likewise.
(add_substitute_path_rule): Likewise.
* spu-linux-nat.c (spu_bfd_open): Likewise.
* spu-tdep.c (info_spu_dma_cmdlist): Likewise.
* stabsread.c (dbx_lookup_type): Likewise.
(read_type): Likewise.
(read_member_functions): Likewise.
(read_struct_fields): Likewise.
(read_baseclasses): Likewise.
(read_args): Likewise.
(_initialize_stabsread): Likewise.
* stack.c (func_command): Likewise.
* stap-probe.c (handle_stap_probe): Likewise.
* symfile.c (addrs_section_sort): Likewise.
(addr_info_make_relative): Likewise.
(load_section_callback): Likewise.
(add_symbol_file_command): Likewise.
(init_filename_language_table): Likewise.
* symtab.c (create_filename_seen_cache): Likewise.
(sort_search_symbols_remove_dups): Likewise.
(search_symbols): Likewise.
* target.c (make_cleanup_restore_target_terminal): Likewise.
* thread.c (new_thread): Likewise.
(enable_thread_stack_temporaries): Likewise.
(make_cleanup_restore_current_thread): Likewise.
(thread_apply_all_command): Likewise.
* tic6x-tdep.c (tic6x_gdbarch_init): Likewise.
* top.c (gdb_readline_wrapper): Likewise.
* tracefile-tfile.c (tfile_trace_file_writer_new): Likewise.
* tracepoint.c (trace_find_line_command): Likewise.
(all_tracepoint_actions_and_cleanup): Likewise.
(make_cleanup_restore_current_traceframe): Likewise.
(get_uploaded_tp): Likewise.
(get_uploaded_tsv): Likewise.
* tui/tui-data.c (tui_alloc_generic_win_info): Likewise.
(tui_alloc_win_info): Likewise.
(tui_alloc_content): Likewise.
(tui_add_content_elements): Likewise.
* tui/tui-disasm.c (tui_find_disassembly_address): Likewise.
(tui_set_disassem_content): Likewise.
* ui-file.c (ui_file_new): Likewise.
(stdio_file_new): Likewise.
(tee_file_new): Likewise.
* utils.c (make_cleanup_restore_integer): Likewise.
(add_internal_problem_command): Likewise.
* v850-tdep.c (v850_gdbarch_init): Likewise.
* valops.c (find_oload_champ): Likewise.
* value.c (allocate_value_lazy): Likewise.
(record_latest_value): Likewise.
(create_internalvar): Likewise.
* varobj.c (install_variable): Likewise.
(new_variable): Likewise.
(new_root_variable): Likewise.
(cppush): Likewise.
(_initialize_varobj): Likewise.
* windows-nat.c (windows_make_so): Likewise.
* x86-nat.c (x86_add_process): Likewise.
* xcoffread.c (arrange_linetable): Likewise.
(allocate_include_entry): Likewise.
(process_linenos): Likewise.
(SYMBOL_DUP): Likewise.
(xcoff_start_psymtab): Likewise.
(xcoff_end_psymtab): Likewise.
* xml-support.c (gdb_xml_parse_attr_ulongest): Likewise.
* xtensa-tdep.c (xtensa_register_type): Likewise.
* gdbarch.c: Regenerate.
* gdbarch.h: Regenerate.
gdb/gdbserver/ChangeLog:
* ax.c (gdb_parse_agent_expr): Likewise.
(compile_bytecodes): Likewise.
* dll.c (loaded_dll): Likewise.
* event-loop.c (append_callback_event): Likewise.
(create_file_handler): Likewise.
(create_file_event): Likewise.
* hostio.c (handle_open): Likewise.
* inferiors.c (add_thread): Likewise.
(add_process): Likewise.
* linux-aarch64-low.c (aarch64_linux_new_process): Likewise.
* linux-arm-low.c (arm_new_process): Likewise.
(arm_new_thread): Likewise.
* linux-low.c (add_to_pid_list): Likewise.
(linux_add_process): Likewise.
(handle_extended_wait): Likewise.
(add_lwp): Likewise.
(enqueue_one_deferred_signal): Likewise.
(enqueue_pending_signal): Likewise.
(linux_resume_one_lwp_throw): Likewise.
(linux_resume_one_thread): Likewise.
(linux_read_memory): Likewise.
(linux_write_memory): Likewise.
* linux-mips-low.c (mips_linux_new_process): Likewise.
(mips_linux_new_thread): Likewise.
(mips_add_watchpoint): Likewise.
* linux-x86-low.c (initialize_low_arch): Likewise.
* lynx-low.c (lynx_add_process): Likewise.
* mem-break.c (set_raw_breakpoint_at): Likewise.
(set_breakpoint): Likewise.
(add_condition_to_breakpoint): Likewise.
(add_commands_to_breakpoint): Likewise.
(clone_agent_expr): Likewise.
(clone_one_breakpoint): Likewise.
* regcache.c (new_register_cache): Likewise.
* remote-utils.c (look_up_one_symbol): Likewise.
* server.c (queue_stop_reply): Likewise.
(start_inferior): Likewise.
(queue_stop_reply_callback): Likewise.
(handle_target_event): Likewise.
* spu-low.c (fetch_ppc_memory): Likewise.
(store_ppc_memory): Likewise.
* target.c (set_target_ops): Likewise.
* thread-db.c (thread_db_load_search): Likewise.
(try_thread_db_load_1): Likewise.
* tracepoint.c (add_tracepoint): Likewise.
(add_tracepoint_action): Likewise.
(create_trace_state_variable): Likewise.
(cmd_qtdpsrc): Likewise.
(cmd_qtro): Likewise.
(add_while_stepping_state): Likewise.
* win32-low.c (child_add_thread): Likewise.
(get_image_name): Likewise.
2015-08-27 05:16:07 +08:00
|
|
|
btinfo->call_history = XCNEW (struct btrace_call_history);
|
btrace: change branch trace data structure
The branch trace is represented as 3 vectors:
- a block vector
- a instruction vector
- a function vector
Each vector (except for the first) is computed from the one above.
Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
- control flow
- same function (instance)
- call stack
This allows us to navigate in the branch trace. We will need this for "record
goto" and reverse execution.
This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.
It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.
The current instruction had been part of the branch trace. This will look odd
once we start support for reverse execution. Remove it. We still keep it in
the trace itself to allow extending the branch trace more easily in the future.
2014-01-16 Markus Metzger <markus.t.metzger@intel.com>
* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.
testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.
2013-03-22 21:32:47 +08:00
|
|
|
|
|
|
|
btinfo->call_history->begin = *begin;
|
|
|
|
btinfo->call_history->end = *end;
|
|
|
|
}
|
2013-04-26 14:37:06 +08:00
|
|
|
|
|
|
|
/* See btrace.h. */
|
|
|
|
|
|
|
|
int
|
|
|
|
btrace_is_replaying (struct thread_info *tp)
|
|
|
|
{
|
|
|
|
return tp->btrace.replay != NULL;
|
|
|
|
}
|
2013-09-10 18:27:14 +08:00
|
|
|
|
|
|
|
/* See btrace.h. */
|
|
|
|
|
|
|
|
int
|
|
|
|
btrace_is_empty (struct thread_info *tp)
|
|
|
|
{
|
|
|
|
struct btrace_insn_iterator begin, end;
|
|
|
|
struct btrace_thread_info *btinfo;
|
|
|
|
|
|
|
|
btinfo = &tp->btrace;
|
|
|
|
|
2017-05-30 18:47:37 +08:00
|
|
|
if (btinfo->functions.empty ())
|
2013-09-10 18:27:14 +08:00
|
|
|
return 1;
|
|
|
|
|
|
|
|
btrace_insn_begin (&begin, btinfo);
|
|
|
|
btrace_insn_end (&end, btinfo);
|
|
|
|
|
|
|
|
return btrace_insn_cmp (&begin, &end) == 0;
|
|
|
|
}
|
2013-11-13 22:31:07 +08:00
|
|
|
|
|
|
|
/* Forward the cleanup request. */
|
|
|
|
|
|
|
|
static void
|
|
|
|
do_btrace_data_cleanup (void *arg)
|
|
|
|
{
|
Add some more casts (1/2)
Note: I needed to split this patch in two, otherwise it's too big for
the mailing list.
This patch adds explicit casts to situations where a void pointer is
assigned to a pointer to the "real" type. Building in C++ mode requires
those assignments to use an explicit cast. This includes, for example:
- callback arguments (cleanups, comparison functions, ...)
- data attached to some object (objfile, program space, etc) in the form
of a void pointer
- "user data" passed to some function
This patch comes from the commit "(mostly) auto-generated patch to insert
casts needed for C++", taken from Pedro's C++ branch.
Only files built on x86 with --enable-targets=all are modified, so the
native files for other arches will need to be dealt with separately.
I built-tested this with --enable-targets=all and reg-tested. To my
surprise, a test case (selftest.exp) had to be adjusted.
Here's the ChangeLog entry. Again, this was relatively quick to make
despite the length, thanks to David Malcom's script, although I don't
believe it's very useful information in that particular case...
gdb/ChangeLog:
* aarch64-tdep.c (aarch64_make_prologue_cache): Add cast(s).
(aarch64_make_stub_cache): Likewise.
(value_of_aarch64_user_reg): Likewise.
* ada-lang.c (ada_inferior_data_cleanup): Likewise.
(get_ada_inferior_data): Likewise.
(get_ada_pspace_data): Likewise.
(ada_pspace_data_cleanup): Likewise.
(ada_complete_symbol_matcher): Likewise.
(ada_exc_search_name_matches): Likewise.
* ada-tasks.c (get_ada_tasks_pspace_data): Likewise.
(get_ada_tasks_inferior_data): Likewise.
* addrmap.c (addrmap_mutable_foreach_worker): Likewise.
(splay_obstack_alloc): Likewise.
(splay_obstack_free): Likewise.
* alpha-linux-tdep.c (alpha_linux_supply_gregset): Likewise.
(alpha_linux_collect_gregset): Likewise.
(alpha_linux_supply_fpregset): Likewise.
(alpha_linux_collect_fpregset): Likewise.
* alpha-mdebug-tdep.c (alpha_mdebug_frame_unwind_cache): Likewise.
* alpha-tdep.c (alpha_lds): Likewise.
(alpha_sts): Likewise.
(alpha_sigtramp_frame_unwind_cache): Likewise.
(alpha_heuristic_frame_unwind_cache): Likewise.
(alpha_supply_int_regs): Likewise.
(alpha_fill_int_regs): Likewise.
(alpha_supply_fp_regs): Likewise.
(alpha_fill_fp_regs): Likewise.
* alphanbsd-tdep.c (alphanbsd_supply_fpregset): Likewise.
(alphanbsd_aout_supply_gregset): Likewise.
(alphanbsd_supply_gregset): Likewise.
* amd64-linux-tdep.c (amd64_linux_init_abi): Likewise.
(amd64_x32_linux_init_abi): Likewise.
* amd64-nat.c (amd64_supply_native_gregset): Likewise.
(amd64_collect_native_gregset): Likewise.
* amd64-tdep.c (amd64_frame_cache): Likewise.
(amd64_sigtramp_frame_cache): Likewise.
(amd64_epilogue_frame_cache): Likewise.
(amd64_supply_fxsave): Likewise.
(amd64_supply_xsave): Likewise.
(amd64_collect_fxsave): Likewise.
(amd64_collect_xsave): Likewise.
* amd64-windows-tdep.c (amd64_windows_frame_cache): Likewise.
* amd64obsd-tdep.c (amd64obsd_trapframe_cache): Likewise.
* arm-linux-tdep.c (arm_linux_supply_gregset): Likewise.
(arm_linux_collect_gregset): Likewise.
(arm_linux_supply_nwfpe): Likewise.
(arm_linux_collect_nwfpe): Likewise.
(arm_linux_supply_vfp): Likewise.
(arm_linux_collect_vfp): Likewise.
* arm-tdep.c (arm_find_mapping_symbol): Likewise.
(arm_prologue_unwind_stop_reason): Likewise.
(arm_prologue_this_id): Likewise.
(arm_prologue_prev_register): Likewise.
(arm_exidx_data_free): Likewise.
(arm_find_exidx_entry): Likewise.
(arm_stub_this_id): Likewise.
(arm_m_exception_this_id): Likewise.
(arm_m_exception_prev_register): Likewise.
(arm_normal_frame_base): Likewise.
(gdb_print_insn_arm): Likewise.
(arm_objfile_data_free): Likewise.
(arm_record_special_symbol): Likewise.
(value_of_arm_user_reg): Likewise.
* armbsd-tdep.c (armbsd_supply_fpregset): Likewise.
(armbsd_supply_gregset): Likewise.
* auto-load.c (auto_load_pspace_data_cleanup): Likewise.
(get_auto_load_pspace_data): Likewise.
(hash_loaded_script_entry): Likewise.
(eq_loaded_script_entry): Likewise.
(clear_section_scripts): Likewise.
(collect_matching_scripts): Likewise.
* auxv.c (auxv_inferior_data_cleanup): Likewise.
(get_auxv_inferior_data): Likewise.
* avr-tdep.c (avr_frame_unwind_cache): Likewise.
* ax-general.c (do_free_agent_expr_cleanup): Likewise.
* bfd-target.c (target_bfd_xfer_partial): Likewise.
(target_bfd_xclose): Likewise.
(target_bfd_get_section_table): Likewise.
* bfin-tdep.c (bfin_frame_cache): Likewise.
* block.c (find_block_in_blockvector): Likewise.
(call_site_for_pc): Likewise.
(block_find_non_opaque_type_preferred): Likewise.
* break-catch-sig.c (signal_catchpoint_insert_location): Likewise.
(signal_catchpoint_remove_location): Likewise.
(signal_catchpoint_breakpoint_hit): Likewise.
(signal_catchpoint_print_one): Likewise.
(signal_catchpoint_print_mention): Likewise.
(signal_catchpoint_print_recreate): Likewise.
* break-catch-syscall.c (get_catch_syscall_inferior_data): Likewise.
* breakpoint.c (do_cleanup_counted_command_line): Likewise.
(bp_location_compare_addrs): Likewise.
(get_first_locp_gte_addr): Likewise.
(check_tracepoint_command): Likewise.
(do_map_commands_command): Likewise.
(get_breakpoint_objfile_data): Likewise.
(free_breakpoint_probes): Likewise.
(do_captured_breakpoint_query): Likewise.
(compare_breakpoints): Likewise.
(bp_location_compare): Likewise.
(bpstat_remove_breakpoint_callback): Likewise.
(do_delete_breakpoint_cleanup): Likewise.
* bsd-uthread.c (bsd_uthread_set_supply_uthread): Likewise.
(bsd_uthread_set_collect_uthread): Likewise.
(bsd_uthread_activate): Likewise.
(bsd_uthread_fetch_registers): Likewise.
(bsd_uthread_store_registers): Likewise.
* btrace.c (check_xml_btrace_version): Likewise.
(parse_xml_btrace_block): Likewise.
(parse_xml_btrace_pt_config_cpu): Likewise.
(parse_xml_btrace_pt_raw): Likewise.
(parse_xml_btrace_pt): Likewise.
(parse_xml_btrace_conf_bts): Likewise.
(parse_xml_btrace_conf_pt): Likewise.
(do_btrace_data_cleanup): Likewise.
* c-typeprint.c (find_typedef_for_canonicalize): Likewise.
* charset.c (cleanup_iconv): Likewise.
(do_cleanup_iterator): Likewise.
* cli-out.c (cli_uiout_dtor): Likewise.
(cli_table_begin): Likewise.
(cli_table_body): Likewise.
(cli_table_end): Likewise.
(cli_table_header): Likewise.
(cli_begin): Likewise.
(cli_end): Likewise.
(cli_field_int): Likewise.
(cli_field_skip): Likewise.
(cli_field_string): Likewise.
(cli_field_fmt): Likewise.
(cli_spaces): Likewise.
(cli_text): Likewise.
(cli_message): Likewise.
(cli_wrap_hint): Likewise.
(cli_flush): Likewise.
(cli_redirect): Likewise.
(out_field_fmt): Likewise.
(field_separator): Likewise.
(cli_out_set_stream): Likewise.
* cli/cli-cmds.c (compare_symtabs): Likewise.
* cli/cli-dump.c (call_dump_func): Likewise.
(restore_section_callback): Likewise.
* cli/cli-script.c (clear_hook_in_cleanup): Likewise.
(do_restore_user_call_depth): Likewise.
(do_free_command_lines_cleanup): Likewise.
* coff-pe-read.c (get_section_vmas): Likewise.
(pe_as16): Likewise.
(pe_as32): Likewise.
* coffread.c (coff_symfile_read): Likewise.
* common/agent.c (agent_look_up_symbols): Likewise.
* common/filestuff.c (do_close_cleanup): Likewise.
* common/format.c (free_format_pieces_cleanup): Likewise.
* common/vec.c (vec_o_reserve): Likewise.
* compile/compile-c-support.c (print_one_macro): Likewise.
* compile/compile-c-symbols.c (hash_symbol_error): Likewise.
(eq_symbol_error): Likewise.
(del_symbol_error): Likewise.
(error_symbol_once): Likewise.
(gcc_convert_symbol): Likewise.
(gcc_symbol_address): Likewise.
(hash_symname): Likewise.
(eq_symname): Likewise.
* compile/compile-c-types.c (hash_type_map_instance): Likewise.
(eq_type_map_instance): Likewise.
(insert_type): Likewise.
(convert_type): Likewise.
* compile/compile-object-load.c (munmap_listp_free_cleanup): Likewise.
(setup_sections): Likewise.
(link_hash_table_free): Likewise.
(copy_sections): Likewise.
* compile/compile-object-run.c (do_module_cleanup): Likewise.
* compile/compile.c (compile_print_value): Likewise.
(do_rmdir): Likewise.
(cleanup_compile_instance): Likewise.
(cleanup_unlink_file): Likewise.
* completer.c (free_completion_tracker): Likewise.
* corelow.c (add_to_spuid_list): Likewise.
* cp-namespace.c (reset_directive_searched): Likewise.
* cp-support.c (reset_directive_searched): Likewise.
* cris-tdep.c (cris_sigtramp_frame_unwind_cache): Likewise.
(cris_frame_unwind_cache): Likewise.
* d-lang.c (builtin_d_type): Likewise.
* d-namespace.c (reset_directive_searched): Likewise.
* dbxread.c (dbx_free_symfile_info): Likewise.
(do_free_bincl_list_cleanup): Likewise.
* disasm.c (hash_dis_line_entry): Likewise.
(eq_dis_line_entry): Likewise.
(dis_asm_print_address): Likewise.
(fprintf_disasm): Likewise.
(do_ui_file_delete): Likewise.
* doublest.c (convert_floatformat_to_doublest): Likewise.
* dummy-frame.c (pop_dummy_frame_bpt): Likewise.
(dummy_frame_prev_register): Likewise.
(dummy_frame_this_id): Likewise.
* dwarf2-frame-tailcall.c (cache_hash): Likewise.
(cache_eq): Likewise.
(cache_find): Likewise.
(tailcall_frame_this_id): Likewise.
(dwarf2_tailcall_prev_register_first): Likewise.
(tailcall_frame_prev_register): Likewise.
(tailcall_frame_dealloc_cache): Likewise.
(tailcall_frame_prev_arch): Likewise.
* dwarf2-frame.c (dwarf2_frame_state_free): Likewise.
(dwarf2_frame_set_init_reg): Likewise.
(dwarf2_frame_init_reg): Likewise.
(dwarf2_frame_set_signal_frame_p): Likewise.
(dwarf2_frame_signal_frame_p): Likewise.
(dwarf2_frame_set_adjust_regnum): Likewise.
(dwarf2_frame_adjust_regnum): Likewise.
(clear_pointer_cleanup): Likewise.
(dwarf2_frame_cache): Likewise.
(find_cie): Likewise.
(dwarf2_frame_find_fde): Likewise.
* dwarf2expr.c (dwarf_expr_address_type): Likewise.
(free_dwarf_expr_context_cleanup): Likewise.
* dwarf2loc.c (locexpr_find_frame_base_location): Likewise.
(locexpr_get_frame_base): Likewise.
(loclist_find_frame_base_location): Likewise.
(loclist_get_frame_base): Likewise.
(dwarf_expr_dwarf_call): Likewise.
(dwarf_expr_get_base_type): Likewise.
(dwarf_expr_push_dwarf_reg_entry_value): Likewise.
(dwarf_expr_get_obj_addr): Likewise.
(entry_data_value_coerce_ref): Likewise.
(entry_data_value_copy_closure): Likewise.
(entry_data_value_free_closure): Likewise.
(get_frame_address_in_block_wrapper): Likewise.
(dwarf2_evaluate_property): Likewise.
(dwarf2_compile_property_to_c): Likewise.
(needs_frame_read_addr_from_reg): Likewise.
(needs_frame_get_reg_value): Likewise.
(needs_frame_frame_base): Likewise.
(needs_frame_frame_cfa): Likewise.
(needs_frame_tls_address): Likewise.
(needs_frame_dwarf_call): Likewise.
(needs_dwarf_reg_entry_value): Likewise.
(get_ax_pc): Likewise.
(locexpr_read_variable): Likewise.
(locexpr_read_variable_at_entry): Likewise.
(locexpr_read_needs_frame): Likewise.
(locexpr_describe_location): Likewise.
(locexpr_tracepoint_var_ref): Likewise.
(locexpr_generate_c_location): Likewise.
(loclist_read_variable): Likewise.
(loclist_read_variable_at_entry): Likewise.
(loclist_describe_location): Likewise.
(loclist_tracepoint_var_ref): Likewise.
(loclist_generate_c_location): Likewise.
* dwarf2read.c (line_header_hash_voidp): Likewise.
(line_header_eq_voidp): Likewise.
(dwarf2_has_info): Likewise.
(dwarf2_get_section_info): Likewise.
(locate_dwz_sections): Likewise.
(hash_file_name_entry): Likewise.
(eq_file_name_entry): Likewise.
(delete_file_name_entry): Likewise.
(dw2_setup): Likewise.
(dw2_get_file_names_reader): Likewise.
(dw2_find_pc_sect_compunit_symtab): Likewise.
(hash_signatured_type): Likewise.
(eq_signatured_type): Likewise.
(add_signatured_type_cu_to_table): Likewise.
(create_debug_types_hash_table): Likewise.
(lookup_dwo_signatured_type): Likewise.
(lookup_dwp_signatured_type): Likewise.
(lookup_signatured_type): Likewise.
(hash_type_unit_group): Likewise.
(eq_type_unit_group): Likewise.
(get_type_unit_group): Likewise.
(process_psymtab_comp_unit_reader): Likewise.
(sort_tu_by_abbrev_offset): Likewise.
(process_skeletonless_type_unit): Likewise.
(psymtabs_addrmap_cleanup): Likewise.
(dwarf2_read_symtab): Likewise.
(psymtab_to_symtab_1): Likewise.
(die_hash): Likewise.
(die_eq): Likewise.
(load_full_comp_unit_reader): Likewise.
(reset_die_in_process): Likewise.
(free_cu_line_header): Likewise.
(handle_DW_AT_stmt_list): Likewise.
(hash_dwo_file): Likewise.
(eq_dwo_file): Likewise.
(hash_dwo_unit): Likewise.
(eq_dwo_unit): Likewise.
(create_dwo_cu_reader): Likewise.
(create_dwo_unit_in_dwp_v1): Likewise.
(create_dwo_unit_in_dwp_v2): Likewise.
(lookup_dwo_unit_in_dwp): Likewise.
(dwarf2_locate_dwo_sections): Likewise.
(dwarf2_locate_common_dwp_sections): Likewise.
(dwarf2_locate_v2_dwp_sections): Likewise.
(hash_dwp_loaded_cutus): Likewise.
(eq_dwp_loaded_cutus): Likewise.
(lookup_dwo_cutu): Likewise.
(abbrev_table_free_cleanup): Likewise.
(dwarf2_free_abbrev_table): Likewise.
(find_partial_die_in_comp_unit): Likewise.
(free_line_header_voidp): Likewise.
(follow_die_offset): Likewise.
(follow_die_sig_1): Likewise.
(free_heap_comp_unit): Likewise.
(free_stack_comp_unit): Likewise.
(dwarf2_free_objfile): Likewise.
(per_cu_offset_and_type_hash): Likewise.
(per_cu_offset_and_type_eq): Likewise.
(get_die_type_at_offset): Likewise.
(partial_die_hash): Likewise.
(partial_die_eq): Likewise.
(dwarf2_per_objfile_free): Likewise.
(hash_strtab_entry): Likewise.
(eq_strtab_entry): Likewise.
(add_string): Likewise.
(hash_symtab_entry): Likewise.
(eq_symtab_entry): Likewise.
(delete_symtab_entry): Likewise.
(cleanup_mapped_symtab): Likewise.
(add_indices_to_cpool): Likewise.
(hash_psymtab_cu_index): Likewise.
(eq_psymtab_cu_index): Likewise.
(add_address_entry_worker): Likewise.
(unlink_if_set): Likewise.
(write_one_signatured_type): Likewise.
(save_gdb_index_command): Likewise.
* elfread.c (elf_symtab_read): Likewise.
(elf_gnu_ifunc_cache_hash): Likewise.
(elf_gnu_ifunc_cache_eq): Likewise.
(elf_gnu_ifunc_record_cache): Likewise.
(elf_gnu_ifunc_resolve_by_cache): Likewise.
(elf_get_probes): Likewise.
(probe_key_free): Likewise.
* f-lang.c (builtin_f_type): Likewise.
* frame-base.c (frame_base_append_sniffer): Likewise.
(frame_base_set_default): Likewise.
(frame_base_find_by_frame): Likewise.
* frame-unwind.c (frame_unwind_prepend_unwinder): Likewise.
(frame_unwind_append_unwinder): Likewise.
(frame_unwind_find_by_frame): Likewise.
* frame.c (frame_addr_hash): Likewise.
(frame_addr_hash_eq): Likewise.
(frame_stash_find): Likewise.
(do_frame_register_read): Likewise.
(unwind_to_current_frame): Likewise.
(frame_cleanup_after_sniffer): Likewise.
* frv-linux-tdep.c (frv_linux_sigtramp_frame_cache): Likewise.
* frv-tdep.c (frv_frame_unwind_cache): Likewise.
* ft32-tdep.c (ft32_frame_cache): Likewise.
* gcore.c (do_bfd_delete_cleanup): Likewise.
(gcore_create_callback): Likewise.
* gdb_bfd.c (hash_bfd): Likewise.
(eq_bfd): Likewise.
(gdb_bfd_open): Likewise.
(free_one_bfd_section): Likewise.
(gdb_bfd_ref): Likewise.
(gdb_bfd_unref): Likewise.
(get_section_descriptor): Likewise.
(gdb_bfd_map_section): Likewise.
(gdb_bfd_crc): Likewise.
(gdb_bfd_mark_parent): Likewise.
(gdb_bfd_record_inclusion): Likewise.
(gdb_bfd_requires_relocations): Likewise.
(print_one_bfd): Likewise.
* gdbtypes.c (type_pair_hash): Likewise.
(type_pair_eq): Likewise.
(builtin_type): Likewise.
(objfile_type): Likewise.
* gnu-v3-abi.c (vtable_ptrdiff_type): Likewise.
(vtable_address_point_offset): Likewise.
(gnuv3_get_vtable): Likewise.
(hash_value_and_voffset): Likewise.
(eq_value_and_voffset): Likewise.
(compare_value_and_voffset): Likewise.
(compute_vtable_size): Likewise.
(gnuv3_get_typeid_type): Likewise.
* go-lang.c (builtin_go_type): Likewise.
* guile/scm-block.c (bkscm_hash_block_smob): Likewise.
(bkscm_eq_block_smob): Likewise.
(bkscm_objfile_block_map): Likewise.
(bkscm_del_objfile_blocks): Likewise.
* guile/scm-breakpoint.c (bpscm_build_bp_list): Likewise.
* guile/scm-disasm.c (gdbscm_disasm_read_memory_worker): Likewise.
(gdbscm_disasm_print_address): Likewise.
* guile/scm-frame.c (frscm_hash_frame_smob): Likewise.
(frscm_eq_frame_smob): Likewise.
(frscm_inferior_frame_map): Likewise.
(frscm_del_inferior_frames): Likewise.
* guile/scm-gsmob.c (gdbscm_add_objfile_ref): Likewise.
* guile/scm-objfile.c (ofscm_handle_objfile_deleted): Likewise.
(ofscm_objfile_smob_from_objfile): Likewise.
* guile/scm-ports.c (ioscm_write): Likewise.
(ioscm_file_port_delete): Likewise.
(ioscm_file_port_rewind): Likewise.
(ioscm_file_port_put): Likewise.
(ioscm_file_port_write): Likewise.
* guile/scm-progspace.c (psscm_handle_pspace_deleted): Likewise.
(psscm_pspace_smob_from_pspace): Likewise.
* guile/scm-safe-call.c (scscm_recording_pre_unwind_handler): Likewise.
(scscm_recording_unwind_handler): Likewise.
(gdbscm_with_catch): Likewise.
(scscm_call_0_body): Likewise.
(scscm_call_1_body): Likewise.
(scscm_call_2_body): Likewise.
(scscm_call_3_body): Likewise.
(scscm_call_4_body): Likewise.
(scscm_apply_1_body): Likewise.
(scscm_eval_scheme_string): Likewise.
(gdbscm_safe_eval_string): Likewise.
(scscm_source_scheme_script): Likewise.
(gdbscm_safe_source_script): Likewise.
* guile/scm-string.c (gdbscm_call_scm_to_stringn): Likewise.
(gdbscm_call_scm_from_stringn): Likewise.
* guile/scm-symbol.c (syscm_hash_symbol_smob): Likewise.
(syscm_eq_symbol_smob): Likewise.
(syscm_get_symbol_map): Likewise.
(syscm_del_objfile_symbols): Likewise.
* guile/scm-symtab.c (stscm_hash_symtab_smob): Likewise.
(stscm_eq_symtab_smob): Likewise.
(stscm_objfile_symtab_map): Likewise.
(stscm_del_objfile_symtabs): Likewise.
* guile/scm-type.c (tyscm_hash_type_smob): Likewise.
(tyscm_eq_type_smob): Likewise.
(tyscm_type_map): Likewise.
(tyscm_copy_type_recursive): Likewise.
(save_objfile_types): Likewise.
* guile/scm-utils.c (extract_arg): Likewise.
* h8300-tdep.c (h8300_frame_cache): Likewise.
* hppa-linux-tdep.c (hppa_linux_sigtramp_frame_unwind_cache): Likewise.
* hppa-tdep.c (compare_unwind_entries): Likewise.
(find_unwind_entry): Likewise.
(hppa_frame_cache): Likewise.
(hppa_stub_frame_unwind_cache): Likewise.
* hppanbsd-tdep.c (hppanbsd_supply_gregset): Likewise.
* hppaobsd-tdep.c (hppaobsd_supply_gregset): Likewise.
(hppaobsd_supply_fpregset): Likewise.
* i386-cygwin-tdep.c (core_process_module_section): Likewise.
* i386-linux-tdep.c (i386_linux_init_abi): Likewise.
* i386-tdep.c (i386_frame_cache): Likewise.
(i386_epilogue_frame_cache): Likewise.
(i386_sigtramp_frame_cache): Likewise.
(i386_supply_gregset): Likewise.
(i386_collect_gregset): Likewise.
(i386_gdbarch_init): Likewise.
* i386obsd-tdep.c (i386obsd_aout_supply_regset): Likewise.
(i386obsd_trapframe_cache): Likewise.
* i387-tdep.c (i387_supply_fsave): Likewise.
(i387_collect_fsave): Likewise.
(i387_supply_fxsave): Likewise.
(i387_collect_fxsave): Likewise.
(i387_supply_xsave): Likewise.
(i387_collect_xsave): Likewise.
* ia64-tdep.c (ia64_frame_cache): Likewise.
(ia64_sigtramp_frame_cache): Likewise.
* infcmd.c (attach_command_continuation): Likewise.
(attach_command_continuation_free_args): Likewise.
* inferior.c (restore_inferior): Likewise.
(delete_thread_of_inferior): Likewise.
* inflow.c (inflow_inferior_data_cleanup): Likewise.
(get_inflow_inferior_data): Likewise.
(inflow_inferior_exit): Likewise.
* infrun.c (displaced_step_clear_cleanup): Likewise.
(restore_current_uiout_cleanup): Likewise.
(release_stop_context_cleanup): Likewise.
(do_restore_infcall_suspend_state_cleanup): Likewise.
(do_restore_infcall_control_state_cleanup): Likewise.
(restore_inferior_ptid): Likewise.
* inline-frame.c (block_starting_point_at): Likewise.
* iq2000-tdep.c (iq2000_frame_cache): Likewise.
* jit.c (get_jit_objfile_data): Likewise.
(get_jit_program_space_data): Likewise.
(jit_object_close_impl): Likewise.
(jit_find_objf_with_entry_addr): Likewise.
(jit_breakpoint_deleted): Likewise.
(jit_unwind_reg_set_impl): Likewise.
(jit_unwind_reg_get_impl): Likewise.
(jit_dealloc_cache): Likewise.
(jit_frame_sniffer): Likewise.
(jit_frame_prev_register): Likewise.
(jit_prepend_unwinder): Likewise.
(jit_inferior_exit_hook): Likewise.
(free_objfile_data): Likewise.
* jv-lang.c (jv_per_objfile_free): Likewise.
(get_dynamics_objfile): Likewise.
(get_java_class_symtab): Likewise.
(builtin_java_type): Likewise.
* language.c (language_string_char_type): Likewise.
(language_bool_type): Likewise.
(language_lookup_primitive_type): Likewise.
(language_lookup_primitive_type_as_symbol): Likewise.
* linespec.c (hash_address_entry): Likewise.
(eq_address_entry): Likewise.
(iterate_inline_only): Likewise.
(iterate_name_matcher): Likewise.
(decode_line_2_compare_items): Likewise.
(collect_one_symbol): Likewise.
(compare_symbols): Likewise.
(compare_msymbols): Likewise.
(add_symtabs_to_list): Likewise.
(collect_symbols): Likewise.
(compare_msyms): Likewise.
(add_minsym): Likewise.
(cleanup_linespec_result): Likewise.
* linux-fork.c (inferior_call_waitpid_cleanup): Likewise.
* linux-nat.c (delete_lwp_cleanup): Likewise.
(count_events_callback): Likewise.
(select_event_lwp_callback): Likewise.
(resume_stopped_resumed_lwps): Likewise.
* linux-tdep.c (get_linux_gdbarch_data): Likewise.
(invalidate_linux_cache_inf): Likewise.
(get_linux_inferior_data): Likewise.
(linux_find_memory_regions_thunk): Likewise.
(linux_make_mappings_callback): Likewise.
(linux_corefile_thread_callback): Likewise.
(find_mapping_size): Likewise.
* linux-thread-db.c (find_new_threads_callback): Likewise.
* lm32-tdep.c (lm32_frame_cache): Likewise.
* m2-lang.c (builtin_m2_type): Likewise.
* m32c-tdep.c (m32c_analyze_frame_prologue): Likewise.
* m32r-linux-tdep.c (m32r_linux_sigtramp_frame_cache): Likewise.
(m32r_linux_supply_gregset): Likewise.
(m32r_linux_collect_gregset): Likewise.
* m32r-tdep.c (m32r_frame_unwind_cache): Likewise.
* m68hc11-tdep.c (m68hc11_frame_unwind_cache): Likewise.
* m68k-tdep.c (m68k_frame_cache): Likewise.
* m68kbsd-tdep.c (m68kbsd_supply_fpregset): Likewise.
(m68kbsd_supply_gregset): Likewise.
* m68klinux-tdep.c (m68k_linux_sigtramp_frame_cache): Likewise.
* m88k-tdep.c (m88k_frame_cache): Likewise.
(m88k_supply_gregset): Likewise.
gdb/gdbserver/ChangeLog:
* dll.c (match_dll): Add cast(s).
(unloaded_dll): Likewise.
* linux-low.c (second_thread_of_pid_p): Likewise.
(delete_lwp_callback): Likewise.
(count_events_callback): Likewise.
(select_event_lwp_callback): Likewise.
(linux_set_resume_request): Likewise.
* server.c (accumulate_file_name_length): Likewise.
(emit_dll_description): Likewise.
(handle_qxfer_threads_worker): Likewise.
(visit_actioned_threads): Likewise.
* thread-db.c (any_thread_of): Likewise.
* tracepoint.c (same_process_p): Likewise.
(match_blocktype): Likewise.
(build_traceframe_info_xml): Likewise.
gdb/testsuite/ChangeLog:
* gdb.gdb/selftest.exp (do_steps_and_nexts): Adjust expected
source line.
2015-09-26 02:08:07 +08:00
|
|
|
btrace_data_fini ((struct btrace_data *) arg);
|
2013-11-13 22:31:07 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* See btrace.h. */
|
|
|
|
|
|
|
|
struct cleanup *
|
|
|
|
make_cleanup_btrace_data (struct btrace_data *data)
|
|
|
|
{
|
|
|
|
return make_cleanup (do_btrace_data_cleanup, data);
|
|
|
|
}
|
btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
|
|
|
|
|
|
|
#if defined (HAVE_LIBIPT)
|
|
|
|
|
|
|
|
/* Print a single packet. */
|
|
|
|
|
|
|
|
static void
|
|
|
|
pt_print_packet (const struct pt_packet *packet)
|
|
|
|
{
|
|
|
|
switch (packet->type)
|
|
|
|
{
|
|
|
|
default:
|
|
|
|
printf_unfiltered (("[??: %x]"), packet->type);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ppt_psb:
|
|
|
|
printf_unfiltered (("psb"));
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ppt_psbend:
|
|
|
|
printf_unfiltered (("psbend"));
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ppt_pad:
|
|
|
|
printf_unfiltered (("pad"));
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ppt_tip:
|
|
|
|
printf_unfiltered (("tip %u: 0x%" PRIx64 ""),
|
|
|
|
packet->payload.ip.ipc,
|
|
|
|
packet->payload.ip.ip);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ppt_tip_pge:
|
|
|
|
printf_unfiltered (("tip.pge %u: 0x%" PRIx64 ""),
|
|
|
|
packet->payload.ip.ipc,
|
|
|
|
packet->payload.ip.ip);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ppt_tip_pgd:
|
|
|
|
printf_unfiltered (("tip.pgd %u: 0x%" PRIx64 ""),
|
|
|
|
packet->payload.ip.ipc,
|
|
|
|
packet->payload.ip.ip);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ppt_fup:
|
|
|
|
printf_unfiltered (("fup %u: 0x%" PRIx64 ""),
|
|
|
|
packet->payload.ip.ipc,
|
|
|
|
packet->payload.ip.ip);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ppt_tnt_8:
|
|
|
|
printf_unfiltered (("tnt-8 %u: 0x%" PRIx64 ""),
|
|
|
|
packet->payload.tnt.bit_size,
|
|
|
|
packet->payload.tnt.payload);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ppt_tnt_64:
|
|
|
|
printf_unfiltered (("tnt-64 %u: 0x%" PRIx64 ""),
|
|
|
|
packet->payload.tnt.bit_size,
|
|
|
|
packet->payload.tnt.payload);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ppt_pip:
|
2015-07-02 21:16:09 +08:00
|
|
|
printf_unfiltered (("pip %" PRIx64 "%s"), packet->payload.pip.cr3,
|
|
|
|
packet->payload.pip.nr ? (" nr") : (""));
|
btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
|
|
|
break;
|
|
|
|
|
|
|
|
case ppt_tsc:
|
|
|
|
printf_unfiltered (("tsc %" PRIx64 ""), packet->payload.tsc.tsc);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ppt_cbr:
|
|
|
|
printf_unfiltered (("cbr %u"), packet->payload.cbr.ratio);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ppt_mode:
|
|
|
|
switch (packet->payload.mode.leaf)
|
|
|
|
{
|
|
|
|
default:
|
|
|
|
printf_unfiltered (("mode %u"), packet->payload.mode.leaf);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case pt_mol_exec:
|
|
|
|
printf_unfiltered (("mode.exec%s%s"),
|
|
|
|
packet->payload.mode.bits.exec.csl
|
|
|
|
? (" cs.l") : (""),
|
|
|
|
packet->payload.mode.bits.exec.csd
|
|
|
|
? (" cs.d") : (""));
|
|
|
|
break;
|
|
|
|
|
|
|
|
case pt_mol_tsx:
|
|
|
|
printf_unfiltered (("mode.tsx%s%s"),
|
|
|
|
packet->payload.mode.bits.tsx.intx
|
|
|
|
? (" intx") : (""),
|
|
|
|
packet->payload.mode.bits.tsx.abrt
|
|
|
|
? (" abrt") : (""));
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ppt_ovf:
|
|
|
|
printf_unfiltered (("ovf"));
|
|
|
|
break;
|
|
|
|
|
2015-07-02 21:16:09 +08:00
|
|
|
case ppt_stop:
|
|
|
|
printf_unfiltered (("stop"));
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ppt_vmcs:
|
|
|
|
printf_unfiltered (("vmcs %" PRIx64 ""), packet->payload.vmcs.base);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ppt_tma:
|
|
|
|
printf_unfiltered (("tma %x %x"), packet->payload.tma.ctc,
|
|
|
|
packet->payload.tma.fc);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ppt_mtc:
|
|
|
|
printf_unfiltered (("mtc %x"), packet->payload.mtc.ctc);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ppt_cyc:
|
|
|
|
printf_unfiltered (("cyc %" PRIx64 ""), packet->payload.cyc.value);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ppt_mnt:
|
|
|
|
printf_unfiltered (("mnt %" PRIx64 ""), packet->payload.mnt.payload);
|
|
|
|
break;
|
btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Decode packets into MAINT using DECODER. */
|
|
|
|
|
|
|
|
static void
|
|
|
|
btrace_maint_decode_pt (struct btrace_maint_info *maint,
|
|
|
|
struct pt_packet_decoder *decoder)
|
|
|
|
{
|
|
|
|
int errcode;
|
|
|
|
|
|
|
|
for (;;)
|
|
|
|
{
|
|
|
|
struct btrace_pt_packet packet;
|
|
|
|
|
|
|
|
errcode = pt_pkt_sync_forward (decoder);
|
|
|
|
if (errcode < 0)
|
|
|
|
break;
|
|
|
|
|
|
|
|
for (;;)
|
|
|
|
{
|
|
|
|
pt_pkt_get_offset (decoder, &packet.offset);
|
|
|
|
|
|
|
|
errcode = pt_pkt_next (decoder, &packet.packet,
|
|
|
|
sizeof(packet.packet));
|
|
|
|
if (errcode < 0)
|
|
|
|
break;
|
|
|
|
|
|
|
|
if (maint_btrace_pt_skip_pad == 0 || packet.packet.type != ppt_pad)
|
|
|
|
{
|
|
|
|
packet.errcode = pt_errcode (errcode);
|
|
|
|
VEC_safe_push (btrace_pt_packet_s, maint->variant.pt.packets,
|
|
|
|
&packet);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (errcode == -pte_eos)
|
|
|
|
break;
|
|
|
|
|
|
|
|
packet.errcode = pt_errcode (errcode);
|
|
|
|
VEC_safe_push (btrace_pt_packet_s, maint->variant.pt.packets,
|
|
|
|
&packet);
|
|
|
|
|
|
|
|
warning (_("Error at trace offset 0x%" PRIx64 ": %s."),
|
|
|
|
packet.offset, pt_errstr (packet.errcode));
|
|
|
|
}
|
|
|
|
|
|
|
|
if (errcode != -pte_eos)
|
2016-01-12 23:03:11 +08:00
|
|
|
warning (_("Failed to synchronize onto the Intel Processor Trace "
|
btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
|
|
|
"stream: %s."), pt_errstr (pt_errcode (errcode)));
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Update the packet history in BTINFO. */
|
|
|
|
|
|
|
|
static void
|
|
|
|
btrace_maint_update_pt_packets (struct btrace_thread_info *btinfo)
|
|
|
|
{
|
|
|
|
volatile struct gdb_exception except;
|
|
|
|
struct pt_packet_decoder *decoder;
|
|
|
|
struct btrace_data_pt *pt;
|
|
|
|
struct pt_config config;
|
|
|
|
int errcode;
|
|
|
|
|
|
|
|
pt = &btinfo->data.variant.pt;
|
|
|
|
|
|
|
|
/* Nothing to do if there is no trace. */
|
|
|
|
if (pt->size == 0)
|
|
|
|
return;
|
|
|
|
|
|
|
|
memset (&config, 0, sizeof(config));
|
|
|
|
|
|
|
|
config.size = sizeof (config);
|
|
|
|
config.begin = pt->data;
|
|
|
|
config.end = pt->data + pt->size;
|
|
|
|
|
|
|
|
config.cpu.vendor = pt_translate_cpu_vendor (pt->config.cpu.vendor);
|
|
|
|
config.cpu.family = pt->config.cpu.family;
|
|
|
|
config.cpu.model = pt->config.cpu.model;
|
|
|
|
config.cpu.stepping = pt->config.cpu.stepping;
|
|
|
|
|
|
|
|
errcode = pt_cpu_errata (&config.errata, &config.cpu);
|
|
|
|
if (errcode < 0)
|
2016-01-12 23:03:11 +08:00
|
|
|
error (_("Failed to configure the Intel Processor Trace decoder: %s."),
|
btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
|
|
|
pt_errstr (pt_errcode (errcode)));
|
|
|
|
|
|
|
|
decoder = pt_pkt_alloc_decoder (&config);
|
|
|
|
if (decoder == NULL)
|
2016-01-12 23:03:11 +08:00
|
|
|
error (_("Failed to allocate the Intel Processor Trace decoder."));
|
btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
|
|
|
|
|
|
|
TRY
|
|
|
|
{
|
|
|
|
btrace_maint_decode_pt (&btinfo->maint, decoder);
|
|
|
|
}
|
|
|
|
CATCH (except, RETURN_MASK_ALL)
|
|
|
|
{
|
|
|
|
pt_pkt_free_decoder (decoder);
|
|
|
|
|
|
|
|
if (except.reason < 0)
|
|
|
|
throw_exception (except);
|
|
|
|
}
|
|
|
|
END_CATCH
|
|
|
|
|
|
|
|
pt_pkt_free_decoder (decoder);
|
|
|
|
}
|
|
|
|
|
|
|
|
#endif /* !defined (HAVE_LIBIPT) */
|
|
|
|
|
|
|
|
/* Update the packet maintenance information for BTINFO and store the
|
|
|
|
low and high bounds into BEGIN and END, respectively.
|
|
|
|
Store the current iterator state into FROM and TO. */
|
|
|
|
|
|
|
|
static void
|
|
|
|
btrace_maint_update_packets (struct btrace_thread_info *btinfo,
|
|
|
|
unsigned int *begin, unsigned int *end,
|
|
|
|
unsigned int *from, unsigned int *to)
|
|
|
|
{
|
|
|
|
switch (btinfo->data.format)
|
|
|
|
{
|
|
|
|
default:
|
|
|
|
*begin = 0;
|
|
|
|
*end = 0;
|
|
|
|
*from = 0;
|
|
|
|
*to = 0;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case BTRACE_FORMAT_BTS:
|
|
|
|
/* Nothing to do - we operate directly on BTINFO->DATA. */
|
|
|
|
*begin = 0;
|
|
|
|
*end = VEC_length (btrace_block_s, btinfo->data.variant.bts.blocks);
|
|
|
|
*from = btinfo->maint.variant.bts.packet_history.begin;
|
|
|
|
*to = btinfo->maint.variant.bts.packet_history.end;
|
|
|
|
break;
|
|
|
|
|
|
|
|
#if defined (HAVE_LIBIPT)
|
|
|
|
case BTRACE_FORMAT_PT:
|
|
|
|
if (VEC_empty (btrace_pt_packet_s, btinfo->maint.variant.pt.packets))
|
|
|
|
btrace_maint_update_pt_packets (btinfo);
|
|
|
|
|
|
|
|
*begin = 0;
|
|
|
|
*end = VEC_length (btrace_pt_packet_s, btinfo->maint.variant.pt.packets);
|
|
|
|
*from = btinfo->maint.variant.pt.packet_history.begin;
|
|
|
|
*to = btinfo->maint.variant.pt.packet_history.end;
|
|
|
|
break;
|
|
|
|
#endif /* defined (HAVE_LIBIPT) */
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Print packets in BTINFO from BEGIN (inclusive) until END (exclusive) and
|
|
|
|
update the current iterator position. */
|
|
|
|
|
|
|
|
static void
|
|
|
|
btrace_maint_print_packets (struct btrace_thread_info *btinfo,
|
|
|
|
unsigned int begin, unsigned int end)
|
|
|
|
{
|
|
|
|
switch (btinfo->data.format)
|
|
|
|
{
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
|
|
|
|
case BTRACE_FORMAT_BTS:
|
|
|
|
{
|
|
|
|
VEC (btrace_block_s) *blocks;
|
|
|
|
unsigned int blk;
|
|
|
|
|
|
|
|
blocks = btinfo->data.variant.bts.blocks;
|
|
|
|
for (blk = begin; blk < end; ++blk)
|
|
|
|
{
|
|
|
|
const btrace_block_s *block;
|
|
|
|
|
|
|
|
block = VEC_index (btrace_block_s, blocks, blk);
|
|
|
|
|
|
|
|
printf_unfiltered ("%u\tbegin: %s, end: %s\n", blk,
|
|
|
|
core_addr_to_string_nz (block->begin),
|
|
|
|
core_addr_to_string_nz (block->end));
|
|
|
|
}
|
|
|
|
|
|
|
|
btinfo->maint.variant.bts.packet_history.begin = begin;
|
|
|
|
btinfo->maint.variant.bts.packet_history.end = end;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
|
|
|
#if defined (HAVE_LIBIPT)
|
|
|
|
case BTRACE_FORMAT_PT:
|
|
|
|
{
|
|
|
|
VEC (btrace_pt_packet_s) *packets;
|
|
|
|
unsigned int pkt;
|
|
|
|
|
|
|
|
packets = btinfo->maint.variant.pt.packets;
|
|
|
|
for (pkt = begin; pkt < end; ++pkt)
|
|
|
|
{
|
|
|
|
const struct btrace_pt_packet *packet;
|
|
|
|
|
|
|
|
packet = VEC_index (btrace_pt_packet_s, packets, pkt);
|
|
|
|
|
|
|
|
printf_unfiltered ("%u\t", pkt);
|
|
|
|
printf_unfiltered ("0x%" PRIx64 "\t", packet->offset);
|
|
|
|
|
|
|
|
if (packet->errcode == pte_ok)
|
|
|
|
pt_print_packet (&packet->packet);
|
|
|
|
else
|
|
|
|
printf_unfiltered ("[error: %s]", pt_errstr (packet->errcode));
|
|
|
|
|
|
|
|
printf_unfiltered ("\n");
|
|
|
|
}
|
|
|
|
|
|
|
|
btinfo->maint.variant.pt.packet_history.begin = begin;
|
|
|
|
btinfo->maint.variant.pt.packet_history.end = end;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
#endif /* defined (HAVE_LIBIPT) */
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Read a number from an argument string. */
|
|
|
|
|
|
|
|
static unsigned int
|
2017-09-13 11:12:42 +08:00
|
|
|
get_uint (const char **arg)
|
btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
|
|
|
{
|
2017-09-13 11:12:42 +08:00
|
|
|
const char *begin, *pos;
|
|
|
|
char *end;
|
btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
|
|
|
unsigned long number;
|
|
|
|
|
|
|
|
begin = *arg;
|
|
|
|
pos = skip_spaces (begin);
|
|
|
|
|
|
|
|
if (!isdigit (*pos))
|
|
|
|
error (_("Expected positive number, got: %s."), pos);
|
|
|
|
|
|
|
|
number = strtoul (pos, &end, 10);
|
|
|
|
if (number > UINT_MAX)
|
|
|
|
error (_("Number too big."));
|
|
|
|
|
|
|
|
*arg += (end - begin);
|
|
|
|
|
|
|
|
return (unsigned int) number;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Read a context size from an argument string. */
|
|
|
|
|
|
|
|
static int
|
2017-09-13 11:12:42 +08:00
|
|
|
get_context_size (const char **arg)
|
btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
|
|
|
{
|
2017-09-13 11:12:42 +08:00
|
|
|
const char *pos = skip_spaces (*arg);
|
btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
|
|
|
|
|
|
|
if (!isdigit (*pos))
|
|
|
|
error (_("Expected positive number, got: %s."), pos);
|
|
|
|
|
2017-09-13 11:12:42 +08:00
|
|
|
char *end;
|
|
|
|
long result = strtol (pos, &end, 10);
|
|
|
|
*arg = end;
|
|
|
|
return result;
|
btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Complain about junk at the end of an argument string. */
|
|
|
|
|
|
|
|
static void
|
2017-09-13 11:12:42 +08:00
|
|
|
no_chunk (const char *arg)
|
btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
|
|
|
{
|
|
|
|
if (*arg != 0)
|
|
|
|
error (_("Junk after argument: %s."), arg);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* The "maintenance btrace packet-history" command. */
|
|
|
|
|
|
|
|
static void
|
2017-09-13 11:12:42 +08:00
|
|
|
maint_btrace_packet_history_cmd (const char *arg, int from_tty)
|
btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
|
|
|
{
|
|
|
|
struct btrace_thread_info *btinfo;
|
|
|
|
struct thread_info *tp;
|
|
|
|
unsigned int size, begin, end, from, to;
|
|
|
|
|
|
|
|
tp = find_thread_ptid (inferior_ptid);
|
|
|
|
if (tp == NULL)
|
|
|
|
error (_("No thread."));
|
|
|
|
|
|
|
|
size = 10;
|
|
|
|
btinfo = &tp->btrace;
|
|
|
|
|
|
|
|
btrace_maint_update_packets (btinfo, &begin, &end, &from, &to);
|
|
|
|
if (begin == end)
|
|
|
|
{
|
|
|
|
printf_unfiltered (_("No trace.\n"));
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (arg == NULL || *arg == 0 || strcmp (arg, "+") == 0)
|
|
|
|
{
|
|
|
|
from = to;
|
|
|
|
|
|
|
|
if (end - from < size)
|
|
|
|
size = end - from;
|
|
|
|
to = from + size;
|
|
|
|
}
|
|
|
|
else if (strcmp (arg, "-") == 0)
|
|
|
|
{
|
|
|
|
to = from;
|
|
|
|
|
|
|
|
if (to - begin < size)
|
|
|
|
size = to - begin;
|
|
|
|
from = to - size;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
from = get_uint (&arg);
|
|
|
|
if (end <= from)
|
|
|
|
error (_("'%u' is out of range."), from);
|
|
|
|
|
|
|
|
arg = skip_spaces (arg);
|
|
|
|
if (*arg == ',')
|
|
|
|
{
|
|
|
|
arg = skip_spaces (++arg);
|
|
|
|
|
|
|
|
if (*arg == '+')
|
|
|
|
{
|
|
|
|
arg += 1;
|
|
|
|
size = get_context_size (&arg);
|
|
|
|
|
|
|
|
no_chunk (arg);
|
|
|
|
|
|
|
|
if (end - from < size)
|
|
|
|
size = end - from;
|
|
|
|
to = from + size;
|
|
|
|
}
|
|
|
|
else if (*arg == '-')
|
|
|
|
{
|
|
|
|
arg += 1;
|
|
|
|
size = get_context_size (&arg);
|
|
|
|
|
|
|
|
no_chunk (arg);
|
|
|
|
|
|
|
|
/* Include the packet given as first argument. */
|
|
|
|
from += 1;
|
|
|
|
to = from;
|
|
|
|
|
|
|
|
if (to - begin < size)
|
|
|
|
size = to - begin;
|
|
|
|
from = to - size;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
to = get_uint (&arg);
|
|
|
|
|
|
|
|
/* Include the packet at the second argument and silently
|
|
|
|
truncate the range. */
|
|
|
|
if (to < end)
|
|
|
|
to += 1;
|
|
|
|
else
|
|
|
|
to = end;
|
|
|
|
|
|
|
|
no_chunk (arg);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
no_chunk (arg);
|
|
|
|
|
|
|
|
if (end - from < size)
|
|
|
|
size = end - from;
|
|
|
|
to = from + size;
|
|
|
|
}
|
|
|
|
|
|
|
|
dont_repeat ();
|
|
|
|
}
|
|
|
|
|
|
|
|
btrace_maint_print_packets (btinfo, from, to);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* The "maintenance btrace clear-packet-history" command. */
|
|
|
|
|
|
|
|
static void
|
2017-09-13 11:12:42 +08:00
|
|
|
maint_btrace_clear_packet_history_cmd (const char *args, int from_tty)
|
btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
|
|
|
{
|
|
|
|
struct btrace_thread_info *btinfo;
|
|
|
|
struct thread_info *tp;
|
|
|
|
|
|
|
|
if (args != NULL && *args != 0)
|
|
|
|
error (_("Invalid argument."));
|
|
|
|
|
|
|
|
tp = find_thread_ptid (inferior_ptid);
|
|
|
|
if (tp == NULL)
|
|
|
|
error (_("No thread."));
|
|
|
|
|
|
|
|
btinfo = &tp->btrace;
|
|
|
|
|
|
|
|
/* Must clear the maint data before - it depends on BTINFO->DATA. */
|
|
|
|
btrace_maint_clear (btinfo);
|
|
|
|
btrace_data_clear (&btinfo->data);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* The "maintenance btrace clear" command. */
|
|
|
|
|
|
|
|
static void
|
2017-09-13 11:12:42 +08:00
|
|
|
maint_btrace_clear_cmd (const char *args, int from_tty)
|
btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
|
|
|
{
|
|
|
|
struct btrace_thread_info *btinfo;
|
|
|
|
struct thread_info *tp;
|
|
|
|
|
|
|
|
if (args != NULL && *args != 0)
|
|
|
|
error (_("Invalid argument."));
|
|
|
|
|
|
|
|
tp = find_thread_ptid (inferior_ptid);
|
|
|
|
if (tp == NULL)
|
|
|
|
error (_("No thread."));
|
|
|
|
|
|
|
|
btrace_clear (tp);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* The "maintenance btrace" command. */
|
|
|
|
|
|
|
|
static void
|
Constify add_prefix_cmd
This changes add_prefix_cmd to accept a const-taking function as an
argument; then fixes up all the callers.
In a couple of spots I had to add a non-const overload of a function,
because the function is passed to two different command-adding
"constructors". These overloads are temporary; once constification is
complete they can be removed.
This patch also fixes a typo I happened to notice while constifying.
Note that this touches a couple of files (gnu-nat.c and go32-nat.c)
that I can't build. So, while I made a best-effort there, I am not
certain they will still compile.
Tested by rebuilding.
gdb/ChangeLog
2017-10-11 Tom Tromey <tom@tromey.com>
* gdbthread.h (thread_command): Constify.
* inferior.h (detach_command): Constify.
* top.h (set_history, show_history): Constify.
* arm-tdep.c (set_arm_command, show_arm_command): Constify.
* serial.c (serial_set_cmd, serial_show_cmd): Constify.
* bsd-kvm.c (bsd_kvm_cmd): Constify.
* printcmd.c (set_command): Constify.
(non_const_set_command): New function.
* dcache.c (set_dcache_command, show_dcache_command): Constify.
* breakpoint.c (enable_command, disable_command, delete_command)
(catch_command, tcatch_command, set_breakpoint_cmd)
(show_breakpoint_cmd): Constify.
* macrocmd.c (macro_command): Constify.
* infcmd.c (unset_command, kill_command, detach_command)
(info_proc_cmd): Constify.
* i386-tdep.c (set_mpx_cmd, show_mpx_cmd): Constify.
* auto-load.c (show_auto_load_cmd, set_auto_load_cmd)
(info_auto_load_cmd): Constify.
* target-descriptions.c (set_tdesc_cmd, show_tdesc_cmd)
(unset_tdesc_cmd): Constify.
* ada-lang.c (set_ada_command, show_ada_command)
(maint_set_ada_cmd, maint_show_ada_cmd): Constify.
* guile/guile.c (set_guile_command, show_guile_command)
(info_guile_command): Constify.
* tui/tui-win.c (tui_command, set_tui_cmd, show_tui_cmd):
Constify.
* skip.c (skip_command): Constify.
* compile/compile.c (_initialize_compile): Constify.
* dwarf2read.c (set_dwarf_cmd, show_dwarf_cmd): Constify.
* btrace.c (maint_btrace_cmd, maint_btrace_set_cmd)
(maint_btrace_show_cmd, maint_btrace_pt_set_cmd)
(maint_btrace_pt_show_cmd): Constify.
* remote.c (set_remote_cmd, show_remote_cmd, remote_command):
Constify.
* python/python.c (user_show_python, user_set_python): Constify.
* mips-tdep.c (set_mips_command, show_mips_command)
(set_mipsfpu_command): Constify.
* record-btrace.c (cmd_record_btrace_start)
(cmd_set_record_btrace, cmd_show_record_btrace)
(cmd_set_record_btrace_bts, cmd_show_record_btrace_bts)
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): Constify.
* rs6000-tdep.c (set_powerpc_command, show_powerpc_command):
Constify.
* symfile.c (overlay_command): Constify.
* spu-tdep.c (set_spu_command, show_spu_command): Constify.
* cli/cli-logging.c (set_logging_command, show_logging_command):
Constify.
* cli/cli-dump.c (dump_command, append_command)
(srec_dump_command, ihex_dump_command, verilog_dump_command)
(tekhex_dump_command, binary_dump_command)
(binary_append_command): Constify.
* cli/cli-decode.c (struct cmd_list_element): Change type of
"fun".
* cli/cli-cmds.c (info_command, show_command, set_debug)
(show_debug): Constify.
(show_command): Add non-const overload.
* top.c (set_history, show_history): Constify.
* sh-tdep.c (set_sh_command, show_sh_command): Constify.
* command.h (add_prefix_cmd): Accept a cmd_const_cfunc_ftype.
* target.c (target_command): Constify.
* sparc64-tdep.c (info_adi_command): Constify.
* record-full.c (cmd_record_full_start): Constify.
(set_record_full_command): Constify. Fix typo.
(show_record_full_command): Constify.
* thread.c (thread_command, thread_apply_command): Constify.
* memattr.c (dummy_cmd): Constify.
* value.c (function_command): Constify.
* frame.c (set_backtrace_cmd, show_backtrace_cmd): Constify.
* probe.c (info_probes_command): Constify.
* ser-tcp.c (set_tcp_cmd, show_tcp_cmd): Constify.
* gnu-nat.c (set_task_cmd, show_task_cmd, set_thread_cmd)
(show_thread_cmd, set_thread_default_cmd)
(show_thread_default_cmd): Constify.
(check_empty): Constify.
* tracepoint.c (tfind_command): Constify.
* cp-support.c (maint_cplus_command): Constify.
* windows-tdep.c (info_w32_command): Constify.
* record.c (cmd_record_start, set_record_command)
(show_record_command, info_record_command, cmd_record_goto):
Constify.
* ravenscar-thread.c (set_ravenscar_command)
(show_ravenscar_command): Constify.
* utils.c (set_internal_problem_cmd, show_internal_problem_cmd):
Constify.
(add_internal_problem_command): Remove casts.
* arc-tdep.c (maintenance_print_arc_command): Constify.
* valprint.c (set_print, show_print, set_print_raw)
(show_print_raw): Constify.
* maint.c (maintenance_command, maintenance_info_command)
(maintenance_print_command, maintenance_set_cmd)
(maintenance_show_cmd, set_per_command_cmd)
(show_per_command_cmd, maintenance_check_command): Constify.
* language.c (set_check, show_check): Constify.
* typeprint.c (show_print_type, set_print_type): Constify.
* go32-nat.c (go32_info_dos_command): Constify.
2017-09-26 12:28:30 +08:00
|
|
|
maint_btrace_cmd (const char *args, int from_tty)
|
btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
|
|
|
{
|
|
|
|
help_list (maint_btrace_cmdlist, "maintenance btrace ", all_commands,
|
|
|
|
gdb_stdout);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* The "maintenance set btrace" command. */
|
|
|
|
|
|
|
|
static void
|
Constify add_prefix_cmd
This changes add_prefix_cmd to accept a const-taking function as an
argument; then fixes up all the callers.
In a couple of spots I had to add a non-const overload of a function,
because the function is passed to two different command-adding
"constructors". These overloads are temporary; once constification is
complete they can be removed.
This patch also fixes a typo I happened to notice while constifying.
Note that this touches a couple of files (gnu-nat.c and go32-nat.c)
that I can't build. So, while I made a best-effort there, I am not
certain they will still compile.
Tested by rebuilding.
gdb/ChangeLog
2017-10-11 Tom Tromey <tom@tromey.com>
* gdbthread.h (thread_command): Constify.
* inferior.h (detach_command): Constify.
* top.h (set_history, show_history): Constify.
* arm-tdep.c (set_arm_command, show_arm_command): Constify.
* serial.c (serial_set_cmd, serial_show_cmd): Constify.
* bsd-kvm.c (bsd_kvm_cmd): Constify.
* printcmd.c (set_command): Constify.
(non_const_set_command): New function.
* dcache.c (set_dcache_command, show_dcache_command): Constify.
* breakpoint.c (enable_command, disable_command, delete_command)
(catch_command, tcatch_command, set_breakpoint_cmd)
(show_breakpoint_cmd): Constify.
* macrocmd.c (macro_command): Constify.
* infcmd.c (unset_command, kill_command, detach_command)
(info_proc_cmd): Constify.
* i386-tdep.c (set_mpx_cmd, show_mpx_cmd): Constify.
* auto-load.c (show_auto_load_cmd, set_auto_load_cmd)
(info_auto_load_cmd): Constify.
* target-descriptions.c (set_tdesc_cmd, show_tdesc_cmd)
(unset_tdesc_cmd): Constify.
* ada-lang.c (set_ada_command, show_ada_command)
(maint_set_ada_cmd, maint_show_ada_cmd): Constify.
* guile/guile.c (set_guile_command, show_guile_command)
(info_guile_command): Constify.
* tui/tui-win.c (tui_command, set_tui_cmd, show_tui_cmd):
Constify.
* skip.c (skip_command): Constify.
* compile/compile.c (_initialize_compile): Constify.
* dwarf2read.c (set_dwarf_cmd, show_dwarf_cmd): Constify.
* btrace.c (maint_btrace_cmd, maint_btrace_set_cmd)
(maint_btrace_show_cmd, maint_btrace_pt_set_cmd)
(maint_btrace_pt_show_cmd): Constify.
* remote.c (set_remote_cmd, show_remote_cmd, remote_command):
Constify.
* python/python.c (user_show_python, user_set_python): Constify.
* mips-tdep.c (set_mips_command, show_mips_command)
(set_mipsfpu_command): Constify.
* record-btrace.c (cmd_record_btrace_start)
(cmd_set_record_btrace, cmd_show_record_btrace)
(cmd_set_record_btrace_bts, cmd_show_record_btrace_bts)
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): Constify.
* rs6000-tdep.c (set_powerpc_command, show_powerpc_command):
Constify.
* symfile.c (overlay_command): Constify.
* spu-tdep.c (set_spu_command, show_spu_command): Constify.
* cli/cli-logging.c (set_logging_command, show_logging_command):
Constify.
* cli/cli-dump.c (dump_command, append_command)
(srec_dump_command, ihex_dump_command, verilog_dump_command)
(tekhex_dump_command, binary_dump_command)
(binary_append_command): Constify.
* cli/cli-decode.c (struct cmd_list_element): Change type of
"fun".
* cli/cli-cmds.c (info_command, show_command, set_debug)
(show_debug): Constify.
(show_command): Add non-const overload.
* top.c (set_history, show_history): Constify.
* sh-tdep.c (set_sh_command, show_sh_command): Constify.
* command.h (add_prefix_cmd): Accept a cmd_const_cfunc_ftype.
* target.c (target_command): Constify.
* sparc64-tdep.c (info_adi_command): Constify.
* record-full.c (cmd_record_full_start): Constify.
(set_record_full_command): Constify. Fix typo.
(show_record_full_command): Constify.
* thread.c (thread_command, thread_apply_command): Constify.
* memattr.c (dummy_cmd): Constify.
* value.c (function_command): Constify.
* frame.c (set_backtrace_cmd, show_backtrace_cmd): Constify.
* probe.c (info_probes_command): Constify.
* ser-tcp.c (set_tcp_cmd, show_tcp_cmd): Constify.
* gnu-nat.c (set_task_cmd, show_task_cmd, set_thread_cmd)
(show_thread_cmd, set_thread_default_cmd)
(show_thread_default_cmd): Constify.
(check_empty): Constify.
* tracepoint.c (tfind_command): Constify.
* cp-support.c (maint_cplus_command): Constify.
* windows-tdep.c (info_w32_command): Constify.
* record.c (cmd_record_start, set_record_command)
(show_record_command, info_record_command, cmd_record_goto):
Constify.
* ravenscar-thread.c (set_ravenscar_command)
(show_ravenscar_command): Constify.
* utils.c (set_internal_problem_cmd, show_internal_problem_cmd):
Constify.
(add_internal_problem_command): Remove casts.
* arc-tdep.c (maintenance_print_arc_command): Constify.
* valprint.c (set_print, show_print, set_print_raw)
(show_print_raw): Constify.
* maint.c (maintenance_command, maintenance_info_command)
(maintenance_print_command, maintenance_set_cmd)
(maintenance_show_cmd, set_per_command_cmd)
(show_per_command_cmd, maintenance_check_command): Constify.
* language.c (set_check, show_check): Constify.
* typeprint.c (show_print_type, set_print_type): Constify.
* go32-nat.c (go32_info_dos_command): Constify.
2017-09-26 12:28:30 +08:00
|
|
|
maint_btrace_set_cmd (const char *args, int from_tty)
|
btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
|
|
|
{
|
|
|
|
help_list (maint_btrace_set_cmdlist, "maintenance set btrace ", all_commands,
|
|
|
|
gdb_stdout);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* The "maintenance show btrace" command. */
|
|
|
|
|
|
|
|
static void
|
Constify add_prefix_cmd
This changes add_prefix_cmd to accept a const-taking function as an
argument; then fixes up all the callers.
In a couple of spots I had to add a non-const overload of a function,
because the function is passed to two different command-adding
"constructors". These overloads are temporary; once constification is
complete they can be removed.
This patch also fixes a typo I happened to notice while constifying.
Note that this touches a couple of files (gnu-nat.c and go32-nat.c)
that I can't build. So, while I made a best-effort there, I am not
certain they will still compile.
Tested by rebuilding.
gdb/ChangeLog
2017-10-11 Tom Tromey <tom@tromey.com>
* gdbthread.h (thread_command): Constify.
* inferior.h (detach_command): Constify.
* top.h (set_history, show_history): Constify.
* arm-tdep.c (set_arm_command, show_arm_command): Constify.
* serial.c (serial_set_cmd, serial_show_cmd): Constify.
* bsd-kvm.c (bsd_kvm_cmd): Constify.
* printcmd.c (set_command): Constify.
(non_const_set_command): New function.
* dcache.c (set_dcache_command, show_dcache_command): Constify.
* breakpoint.c (enable_command, disable_command, delete_command)
(catch_command, tcatch_command, set_breakpoint_cmd)
(show_breakpoint_cmd): Constify.
* macrocmd.c (macro_command): Constify.
* infcmd.c (unset_command, kill_command, detach_command)
(info_proc_cmd): Constify.
* i386-tdep.c (set_mpx_cmd, show_mpx_cmd): Constify.
* auto-load.c (show_auto_load_cmd, set_auto_load_cmd)
(info_auto_load_cmd): Constify.
* target-descriptions.c (set_tdesc_cmd, show_tdesc_cmd)
(unset_tdesc_cmd): Constify.
* ada-lang.c (set_ada_command, show_ada_command)
(maint_set_ada_cmd, maint_show_ada_cmd): Constify.
* guile/guile.c (set_guile_command, show_guile_command)
(info_guile_command): Constify.
* tui/tui-win.c (tui_command, set_tui_cmd, show_tui_cmd):
Constify.
* skip.c (skip_command): Constify.
* compile/compile.c (_initialize_compile): Constify.
* dwarf2read.c (set_dwarf_cmd, show_dwarf_cmd): Constify.
* btrace.c (maint_btrace_cmd, maint_btrace_set_cmd)
(maint_btrace_show_cmd, maint_btrace_pt_set_cmd)
(maint_btrace_pt_show_cmd): Constify.
* remote.c (set_remote_cmd, show_remote_cmd, remote_command):
Constify.
* python/python.c (user_show_python, user_set_python): Constify.
* mips-tdep.c (set_mips_command, show_mips_command)
(set_mipsfpu_command): Constify.
* record-btrace.c (cmd_record_btrace_start)
(cmd_set_record_btrace, cmd_show_record_btrace)
(cmd_set_record_btrace_bts, cmd_show_record_btrace_bts)
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): Constify.
* rs6000-tdep.c (set_powerpc_command, show_powerpc_command):
Constify.
* symfile.c (overlay_command): Constify.
* spu-tdep.c (set_spu_command, show_spu_command): Constify.
* cli/cli-logging.c (set_logging_command, show_logging_command):
Constify.
* cli/cli-dump.c (dump_command, append_command)
(srec_dump_command, ihex_dump_command, verilog_dump_command)
(tekhex_dump_command, binary_dump_command)
(binary_append_command): Constify.
* cli/cli-decode.c (struct cmd_list_element): Change type of
"fun".
* cli/cli-cmds.c (info_command, show_command, set_debug)
(show_debug): Constify.
(show_command): Add non-const overload.
* top.c (set_history, show_history): Constify.
* sh-tdep.c (set_sh_command, show_sh_command): Constify.
* command.h (add_prefix_cmd): Accept a cmd_const_cfunc_ftype.
* target.c (target_command): Constify.
* sparc64-tdep.c (info_adi_command): Constify.
* record-full.c (cmd_record_full_start): Constify.
(set_record_full_command): Constify. Fix typo.
(show_record_full_command): Constify.
* thread.c (thread_command, thread_apply_command): Constify.
* memattr.c (dummy_cmd): Constify.
* value.c (function_command): Constify.
* frame.c (set_backtrace_cmd, show_backtrace_cmd): Constify.
* probe.c (info_probes_command): Constify.
* ser-tcp.c (set_tcp_cmd, show_tcp_cmd): Constify.
* gnu-nat.c (set_task_cmd, show_task_cmd, set_thread_cmd)
(show_thread_cmd, set_thread_default_cmd)
(show_thread_default_cmd): Constify.
(check_empty): Constify.
* tracepoint.c (tfind_command): Constify.
* cp-support.c (maint_cplus_command): Constify.
* windows-tdep.c (info_w32_command): Constify.
* record.c (cmd_record_start, set_record_command)
(show_record_command, info_record_command, cmd_record_goto):
Constify.
* ravenscar-thread.c (set_ravenscar_command)
(show_ravenscar_command): Constify.
* utils.c (set_internal_problem_cmd, show_internal_problem_cmd):
Constify.
(add_internal_problem_command): Remove casts.
* arc-tdep.c (maintenance_print_arc_command): Constify.
* valprint.c (set_print, show_print, set_print_raw)
(show_print_raw): Constify.
* maint.c (maintenance_command, maintenance_info_command)
(maintenance_print_command, maintenance_set_cmd)
(maintenance_show_cmd, set_per_command_cmd)
(show_per_command_cmd, maintenance_check_command): Constify.
* language.c (set_check, show_check): Constify.
* typeprint.c (show_print_type, set_print_type): Constify.
* go32-nat.c (go32_info_dos_command): Constify.
2017-09-26 12:28:30 +08:00
|
|
|
maint_btrace_show_cmd (const char *args, int from_tty)
|
btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
|
|
|
{
|
|
|
|
help_list (maint_btrace_show_cmdlist, "maintenance show btrace ",
|
|
|
|
all_commands, gdb_stdout);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* The "maintenance set btrace pt" command. */
|
|
|
|
|
|
|
|
static void
|
Constify add_prefix_cmd
This changes add_prefix_cmd to accept a const-taking function as an
argument; then fixes up all the callers.
In a couple of spots I had to add a non-const overload of a function,
because the function is passed to two different command-adding
"constructors". These overloads are temporary; once constification is
complete they can be removed.
This patch also fixes a typo I happened to notice while constifying.
Note that this touches a couple of files (gnu-nat.c and go32-nat.c)
that I can't build. So, while I made a best-effort there, I am not
certain they will still compile.
Tested by rebuilding.
gdb/ChangeLog
2017-10-11 Tom Tromey <tom@tromey.com>
* gdbthread.h (thread_command): Constify.
* inferior.h (detach_command): Constify.
* top.h (set_history, show_history): Constify.
* arm-tdep.c (set_arm_command, show_arm_command): Constify.
* serial.c (serial_set_cmd, serial_show_cmd): Constify.
* bsd-kvm.c (bsd_kvm_cmd): Constify.
* printcmd.c (set_command): Constify.
(non_const_set_command): New function.
* dcache.c (set_dcache_command, show_dcache_command): Constify.
* breakpoint.c (enable_command, disable_command, delete_command)
(catch_command, tcatch_command, set_breakpoint_cmd)
(show_breakpoint_cmd): Constify.
* macrocmd.c (macro_command): Constify.
* infcmd.c (unset_command, kill_command, detach_command)
(info_proc_cmd): Constify.
* i386-tdep.c (set_mpx_cmd, show_mpx_cmd): Constify.
* auto-load.c (show_auto_load_cmd, set_auto_load_cmd)
(info_auto_load_cmd): Constify.
* target-descriptions.c (set_tdesc_cmd, show_tdesc_cmd)
(unset_tdesc_cmd): Constify.
* ada-lang.c (set_ada_command, show_ada_command)
(maint_set_ada_cmd, maint_show_ada_cmd): Constify.
* guile/guile.c (set_guile_command, show_guile_command)
(info_guile_command): Constify.
* tui/tui-win.c (tui_command, set_tui_cmd, show_tui_cmd):
Constify.
* skip.c (skip_command): Constify.
* compile/compile.c (_initialize_compile): Constify.
* dwarf2read.c (set_dwarf_cmd, show_dwarf_cmd): Constify.
* btrace.c (maint_btrace_cmd, maint_btrace_set_cmd)
(maint_btrace_show_cmd, maint_btrace_pt_set_cmd)
(maint_btrace_pt_show_cmd): Constify.
* remote.c (set_remote_cmd, show_remote_cmd, remote_command):
Constify.
* python/python.c (user_show_python, user_set_python): Constify.
* mips-tdep.c (set_mips_command, show_mips_command)
(set_mipsfpu_command): Constify.
* record-btrace.c (cmd_record_btrace_start)
(cmd_set_record_btrace, cmd_show_record_btrace)
(cmd_set_record_btrace_bts, cmd_show_record_btrace_bts)
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): Constify.
* rs6000-tdep.c (set_powerpc_command, show_powerpc_command):
Constify.
* symfile.c (overlay_command): Constify.
* spu-tdep.c (set_spu_command, show_spu_command): Constify.
* cli/cli-logging.c (set_logging_command, show_logging_command):
Constify.
* cli/cli-dump.c (dump_command, append_command)
(srec_dump_command, ihex_dump_command, verilog_dump_command)
(tekhex_dump_command, binary_dump_command)
(binary_append_command): Constify.
* cli/cli-decode.c (struct cmd_list_element): Change type of
"fun".
* cli/cli-cmds.c (info_command, show_command, set_debug)
(show_debug): Constify.
(show_command): Add non-const overload.
* top.c (set_history, show_history): Constify.
* sh-tdep.c (set_sh_command, show_sh_command): Constify.
* command.h (add_prefix_cmd): Accept a cmd_const_cfunc_ftype.
* target.c (target_command): Constify.
* sparc64-tdep.c (info_adi_command): Constify.
* record-full.c (cmd_record_full_start): Constify.
(set_record_full_command): Constify. Fix typo.
(show_record_full_command): Constify.
* thread.c (thread_command, thread_apply_command): Constify.
* memattr.c (dummy_cmd): Constify.
* value.c (function_command): Constify.
* frame.c (set_backtrace_cmd, show_backtrace_cmd): Constify.
* probe.c (info_probes_command): Constify.
* ser-tcp.c (set_tcp_cmd, show_tcp_cmd): Constify.
* gnu-nat.c (set_task_cmd, show_task_cmd, set_thread_cmd)
(show_thread_cmd, set_thread_default_cmd)
(show_thread_default_cmd): Constify.
(check_empty): Constify.
* tracepoint.c (tfind_command): Constify.
* cp-support.c (maint_cplus_command): Constify.
* windows-tdep.c (info_w32_command): Constify.
* record.c (cmd_record_start, set_record_command)
(show_record_command, info_record_command, cmd_record_goto):
Constify.
* ravenscar-thread.c (set_ravenscar_command)
(show_ravenscar_command): Constify.
* utils.c (set_internal_problem_cmd, show_internal_problem_cmd):
Constify.
(add_internal_problem_command): Remove casts.
* arc-tdep.c (maintenance_print_arc_command): Constify.
* valprint.c (set_print, show_print, set_print_raw)
(show_print_raw): Constify.
* maint.c (maintenance_command, maintenance_info_command)
(maintenance_print_command, maintenance_set_cmd)
(maintenance_show_cmd, set_per_command_cmd)
(show_per_command_cmd, maintenance_check_command): Constify.
* language.c (set_check, show_check): Constify.
* typeprint.c (show_print_type, set_print_type): Constify.
* go32-nat.c (go32_info_dos_command): Constify.
2017-09-26 12:28:30 +08:00
|
|
|
maint_btrace_pt_set_cmd (const char *args, int from_tty)
|
btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
|
|
|
{
|
|
|
|
help_list (maint_btrace_pt_set_cmdlist, "maintenance set btrace pt ",
|
|
|
|
all_commands, gdb_stdout);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* The "maintenance show btrace pt" command. */
|
|
|
|
|
|
|
|
static void
|
Constify add_prefix_cmd
This changes add_prefix_cmd to accept a const-taking function as an
argument; then fixes up all the callers.
In a couple of spots I had to add a non-const overload of a function,
because the function is passed to two different command-adding
"constructors". These overloads are temporary; once constification is
complete they can be removed.
This patch also fixes a typo I happened to notice while constifying.
Note that this touches a couple of files (gnu-nat.c and go32-nat.c)
that I can't build. So, while I made a best-effort there, I am not
certain they will still compile.
Tested by rebuilding.
gdb/ChangeLog
2017-10-11 Tom Tromey <tom@tromey.com>
* gdbthread.h (thread_command): Constify.
* inferior.h (detach_command): Constify.
* top.h (set_history, show_history): Constify.
* arm-tdep.c (set_arm_command, show_arm_command): Constify.
* serial.c (serial_set_cmd, serial_show_cmd): Constify.
* bsd-kvm.c (bsd_kvm_cmd): Constify.
* printcmd.c (set_command): Constify.
(non_const_set_command): New function.
* dcache.c (set_dcache_command, show_dcache_command): Constify.
* breakpoint.c (enable_command, disable_command, delete_command)
(catch_command, tcatch_command, set_breakpoint_cmd)
(show_breakpoint_cmd): Constify.
* macrocmd.c (macro_command): Constify.
* infcmd.c (unset_command, kill_command, detach_command)
(info_proc_cmd): Constify.
* i386-tdep.c (set_mpx_cmd, show_mpx_cmd): Constify.
* auto-load.c (show_auto_load_cmd, set_auto_load_cmd)
(info_auto_load_cmd): Constify.
* target-descriptions.c (set_tdesc_cmd, show_tdesc_cmd)
(unset_tdesc_cmd): Constify.
* ada-lang.c (set_ada_command, show_ada_command)
(maint_set_ada_cmd, maint_show_ada_cmd): Constify.
* guile/guile.c (set_guile_command, show_guile_command)
(info_guile_command): Constify.
* tui/tui-win.c (tui_command, set_tui_cmd, show_tui_cmd):
Constify.
* skip.c (skip_command): Constify.
* compile/compile.c (_initialize_compile): Constify.
* dwarf2read.c (set_dwarf_cmd, show_dwarf_cmd): Constify.
* btrace.c (maint_btrace_cmd, maint_btrace_set_cmd)
(maint_btrace_show_cmd, maint_btrace_pt_set_cmd)
(maint_btrace_pt_show_cmd): Constify.
* remote.c (set_remote_cmd, show_remote_cmd, remote_command):
Constify.
* python/python.c (user_show_python, user_set_python): Constify.
* mips-tdep.c (set_mips_command, show_mips_command)
(set_mipsfpu_command): Constify.
* record-btrace.c (cmd_record_btrace_start)
(cmd_set_record_btrace, cmd_show_record_btrace)
(cmd_set_record_btrace_bts, cmd_show_record_btrace_bts)
(cmd_set_record_btrace_pt, cmd_show_record_btrace_pt): Constify.
* rs6000-tdep.c (set_powerpc_command, show_powerpc_command):
Constify.
* symfile.c (overlay_command): Constify.
* spu-tdep.c (set_spu_command, show_spu_command): Constify.
* cli/cli-logging.c (set_logging_command, show_logging_command):
Constify.
* cli/cli-dump.c (dump_command, append_command)
(srec_dump_command, ihex_dump_command, verilog_dump_command)
(tekhex_dump_command, binary_dump_command)
(binary_append_command): Constify.
* cli/cli-decode.c (struct cmd_list_element): Change type of
"fun".
* cli/cli-cmds.c (info_command, show_command, set_debug)
(show_debug): Constify.
(show_command): Add non-const overload.
* top.c (set_history, show_history): Constify.
* sh-tdep.c (set_sh_command, show_sh_command): Constify.
* command.h (add_prefix_cmd): Accept a cmd_const_cfunc_ftype.
* target.c (target_command): Constify.
* sparc64-tdep.c (info_adi_command): Constify.
* record-full.c (cmd_record_full_start): Constify.
(set_record_full_command): Constify. Fix typo.
(show_record_full_command): Constify.
* thread.c (thread_command, thread_apply_command): Constify.
* memattr.c (dummy_cmd): Constify.
* value.c (function_command): Constify.
* frame.c (set_backtrace_cmd, show_backtrace_cmd): Constify.
* probe.c (info_probes_command): Constify.
* ser-tcp.c (set_tcp_cmd, show_tcp_cmd): Constify.
* gnu-nat.c (set_task_cmd, show_task_cmd, set_thread_cmd)
(show_thread_cmd, set_thread_default_cmd)
(show_thread_default_cmd): Constify.
(check_empty): Constify.
* tracepoint.c (tfind_command): Constify.
* cp-support.c (maint_cplus_command): Constify.
* windows-tdep.c (info_w32_command): Constify.
* record.c (cmd_record_start, set_record_command)
(show_record_command, info_record_command, cmd_record_goto):
Constify.
* ravenscar-thread.c (set_ravenscar_command)
(show_ravenscar_command): Constify.
* utils.c (set_internal_problem_cmd, show_internal_problem_cmd):
Constify.
(add_internal_problem_command): Remove casts.
* arc-tdep.c (maintenance_print_arc_command): Constify.
* valprint.c (set_print, show_print, set_print_raw)
(show_print_raw): Constify.
* maint.c (maintenance_command, maintenance_info_command)
(maintenance_print_command, maintenance_set_cmd)
(maintenance_show_cmd, set_per_command_cmd)
(show_per_command_cmd, maintenance_check_command): Constify.
* language.c (set_check, show_check): Constify.
* typeprint.c (show_print_type, set_print_type): Constify.
* go32-nat.c (go32_info_dos_command): Constify.
2017-09-26 12:28:30 +08:00
|
|
|
maint_btrace_pt_show_cmd (const char *args, int from_tty)
|
btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
|
|
|
{
|
|
|
|
help_list (maint_btrace_pt_show_cmdlist, "maintenance show btrace pt ",
|
|
|
|
all_commands, gdb_stdout);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* The "maintenance info btrace" command. */
|
|
|
|
|
|
|
|
static void
|
2017-09-13 11:12:42 +08:00
|
|
|
maint_info_btrace_cmd (const char *args, int from_tty)
|
btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
|
|
|
{
|
|
|
|
struct btrace_thread_info *btinfo;
|
|
|
|
struct thread_info *tp;
|
|
|
|
const struct btrace_config *conf;
|
|
|
|
|
|
|
|
if (args != NULL && *args != 0)
|
|
|
|
error (_("Invalid argument."));
|
|
|
|
|
|
|
|
tp = find_thread_ptid (inferior_ptid);
|
|
|
|
if (tp == NULL)
|
|
|
|
error (_("No thread."));
|
|
|
|
|
|
|
|
btinfo = &tp->btrace;
|
|
|
|
|
|
|
|
conf = btrace_conf (btinfo);
|
|
|
|
if (conf == NULL)
|
|
|
|
error (_("No btrace configuration."));
|
|
|
|
|
|
|
|
printf_unfiltered (_("Format: %s.\n"),
|
|
|
|
btrace_format_string (conf->format));
|
|
|
|
|
|
|
|
switch (conf->format)
|
|
|
|
{
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
|
|
|
|
case BTRACE_FORMAT_BTS:
|
|
|
|
printf_unfiltered (_("Number of packets: %u.\n"),
|
|
|
|
VEC_length (btrace_block_s,
|
|
|
|
btinfo->data.variant.bts.blocks));
|
|
|
|
break;
|
|
|
|
|
|
|
|
#if defined (HAVE_LIBIPT)
|
|
|
|
case BTRACE_FORMAT_PT:
|
|
|
|
{
|
|
|
|
struct pt_version version;
|
|
|
|
|
|
|
|
version = pt_library_version ();
|
|
|
|
printf_unfiltered (_("Version: %u.%u.%u%s.\n"), version.major,
|
|
|
|
version.minor, version.build,
|
|
|
|
version.ext != NULL ? version.ext : "");
|
|
|
|
|
|
|
|
btrace_maint_update_pt_packets (btinfo);
|
|
|
|
printf_unfiltered (_("Number of packets: %u.\n"),
|
|
|
|
VEC_length (btrace_pt_packet_s,
|
|
|
|
btinfo->maint.variant.pt.packets));
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
#endif /* defined (HAVE_LIBIPT) */
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
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|
/* The "maint show btrace pt skip-pad" show value function. */
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static void
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show_maint_btrace_pt_skip_pad (struct ui_file *file, int from_tty,
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struct cmd_list_element *c,
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const char *value)
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{
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fprintf_filtered (file, _("Skip PAD packets is %s.\n"), value);
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}
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/* Initialize btrace maintenance commands. */
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void
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_initialize_btrace (void)
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{
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add_cmd ("btrace", class_maintenance, maint_info_btrace_cmd,
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_("Info about branch tracing data."), &maintenanceinfolist);
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add_prefix_cmd ("btrace", class_maintenance, maint_btrace_cmd,
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_("Branch tracing maintenance commands."),
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&maint_btrace_cmdlist, "maintenance btrace ",
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0, &maintenancelist);
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add_prefix_cmd ("btrace", class_maintenance, maint_btrace_set_cmd, _("\
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Set branch tracing specific variables."),
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&maint_btrace_set_cmdlist, "maintenance set btrace ",
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0, &maintenance_set_cmdlist);
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add_prefix_cmd ("pt", class_maintenance, maint_btrace_pt_set_cmd, _("\
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2016-01-12 23:03:11 +08:00
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Set Intel Processor Trace specific variables."),
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btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
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&maint_btrace_pt_set_cmdlist, "maintenance set btrace pt ",
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0, &maint_btrace_set_cmdlist);
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add_prefix_cmd ("btrace", class_maintenance, maint_btrace_show_cmd, _("\
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Show branch tracing specific variables."),
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&maint_btrace_show_cmdlist, "maintenance show btrace ",
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0, &maintenance_show_cmdlist);
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add_prefix_cmd ("pt", class_maintenance, maint_btrace_pt_show_cmd, _("\
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2016-01-12 23:03:11 +08:00
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Show Intel Processor Trace specific variables."),
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btrace: maintenance commands
Add maintenance commands that help debugging the btrace record target.
The following new commands are added:
maint info btrace
Print information about branch tracing internals.
maint btrace packet-history
Print the raw branch tracing data.
maint btrace clear-packet-history
Discard the stored raw branch tracing data.
maint btrace clear
Discard all branch tracing data. It will be fetched and processed
anew by the next "record" command.
maint set|show btrace pt skip-pad
Set and show whether PAD packets are skipped when computing the
packet history.
gdb/
* btrace.c: Include gdbcmd.h, cli/cli-utils.h, and ctype.h.
(maint_btrace_cmdlist, maint_btrace_set_cmdlist)
(maint_btrace_show_cmdlist, maint_btrace_pt_set_cmdlist)
(maint_btrace_pt_show_cmdlist, maint_btrace_pt_skip_pad)
(btrace_maint_clear): New.
(btrace_fetch, btrace_clear): Call btrace_maint_clear.
(pt_print_packet, btrace_maint_decode_pt)
(btrace_maint_update_pt_packets, btrace_maint_update_packets)
(btrace_maint_print_packets, get_uint, get_context_size, no_chunk)
(maint_btrace_packet_history_cmd)
(maint_btrace_clear_packet_history_cmd, maint_btrace_clear_cmd)
(maint_btrace_cmd, maint_btrace_set_cmd, maint_btrace_show_cmd)
(maint_btrace_pt_set_cmd, maint_btrace_pt_show_cmd)
(maint_info_btrace_cmd, _initialize_btrace): New.
* btrace.h (btrace_pt_packet, btrace_pt_packet_s)
(btrace_maint_packet_history, btrace_maint_info): New.
(btrace_thread_info) <maint>: New.
* NEWS: Announce it.
doc/
* gdb.texinfo (Maintenance Commands): Document "maint btrace"
commands.
2014-02-03 21:35:28 +08:00
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&maint_btrace_pt_show_cmdlist, "maintenance show btrace pt ",
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0, &maint_btrace_show_cmdlist);
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add_setshow_boolean_cmd ("skip-pad", class_maintenance,
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&maint_btrace_pt_skip_pad, _("\
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Set whether PAD packets should be skipped in the btrace packet history."), _("\
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Show whether PAD packets should be skipped in the btrace packet history."),_("\
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When enabled, PAD packets are ignored in the btrace packet history."),
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NULL, show_maint_btrace_pt_skip_pad,
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&maint_btrace_pt_set_cmdlist,
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&maint_btrace_pt_show_cmdlist);
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add_cmd ("packet-history", class_maintenance, maint_btrace_packet_history_cmd,
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_("Print the raw branch tracing data.\n\
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With no argument, print ten more packets after the previous ten-line print.\n\
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With '-' as argument print ten packets before a previous ten-line print.\n\
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One argument specifies the starting packet of a ten-line print.\n\
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Two arguments with comma between specify starting and ending packets to \
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print.\n\
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Preceded with '+'/'-' the second argument specifies the distance from the \
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first.\n"),
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&maint_btrace_cmdlist);
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add_cmd ("clear-packet-history", class_maintenance,
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maint_btrace_clear_packet_history_cmd,
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_("Clears the branch tracing packet history.\n\
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Discards the raw branch tracing data but not the execution history data.\n\
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"),
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&maint_btrace_cmdlist);
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add_cmd ("clear", class_maintenance, maint_btrace_clear_cmd,
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_("Clears the branch tracing data.\n\
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Discards the raw branch tracing data and the execution history data.\n\
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The next 'record' command will fetch the branch tracing data anew.\n\
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"),
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&maint_btrace_cmdlist);
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}
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