mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-06 00:34:26 +08:00
a068643d69
Currently the target pid_to_str method returns a const char *, so many implementations have a static buffer that they update. This patch changes these methods to return a std::string instead. I think this is cleaner and avoids possible gotchas when calling pid_to_str on different ptids in a single statement. (Though no such calls exist currently.) This also updates various helper functions, and the gdbarch pid_to_str methods. I also made a best effort to fix all the callers, but I can't build some of the *-nat.c files. Tested by the buildbot. gdb/ChangeLog 2019-03-13 Tom Tromey <tromey@adacore.com> * i386-gnu-nat.c (i386_gnu_nat_target::fetch_registers) (i386_gnu_nat_target::store_registers): Update. * target-debug.h (target_debug_print_std_string): New macro. * x86-linux-nat.c (x86_linux_nat_target::enable_btrace): Update. * windows-tdep.c (display_one_tib): Update. * tui/tui-stack.c (tui_make_status_line): Update. * top.c (print_inferior_quit_action): Update. * thread.c (thr_try_catch_cmd): Update. (add_thread_with_info): Update. (thread_target_id_str): Update. (thr_try_catch_cmd): Update. (thread_command): Update. (thread_find_command): Update. * record-btrace.c (record_btrace_target::info_record) (record_btrace_resume_thread, record_btrace_target::resume) (record_btrace_cancel_resume, record_btrace_step_thread) (record_btrace_target::wait, record_btrace_target::wait) (record_btrace_target::wait, record_btrace_target::stop): Update. * progspace.c (print_program_space): Update. * process-stratum-target.c (process_stratum_target::thread_address_space): Update. * linux-fork.c (linux_fork_mourn_inferior) (detach_checkpoint_command, info_checkpoints_command) (linux_fork_context): Update. (linux_fork_detach): Update. (class scoped_switch_fork_info): Update. (delete_checkpoint_command): Update. * infrun.c (follow_fork_inferior): Update. (follow_fork_inferior): Update. (proceed_after_vfork_done): Update. (handle_vfork_child_exec_or_exit): Update. (follow_exec): Update. (displaced_step_prepare_throw): Update. (displaced_step_restore): Update. (start_step_over): Update. (resume_1): Update. (clear_proceed_status_thread): Update. (proceed): Update. (print_target_wait_results): Update. (do_target_wait): Update. (context_switch): Update. (stop_all_threads): Update. (restart_threads): Update. (finish_step_over): Update. (handle_signal_stop): Update. (switch_back_to_stepped_thread): Update. (keep_going_pass_signal): Update. (print_exited_reason): Update. (normal_stop): Update. * inferior.c (inferior_pid_to_str): Change return type. (print_selected_inferior): Update. (add_inferior): Update. (detach_inferior): Update. * dummy-frame.c (fprint_dummy_frames): Update. * dcache.c (dcache_info_1): Update. * btrace.c (btrace_enable, btrace_disable, btrace_teardown) (btrace_fetch, btrace_clear): Update. * linux-tdep.c (linux_core_pid_to_str): Change return type. * i386-cygwin-tdep.c (i386_windows_core_pid_to_str): Change return type. * fbsd-tdep.c (fbsd_core_pid_to_str): Change return type. * sol2-tdep.h (sol2_core_pid_to_str): Change return type. * sol2-tdep.c (sol2_core_pid_to_str): Change return type. * gdbarch.c, gdbarch.h: Rebuild. * gdbarch.sh (core_pid_to_str): Change return type. * windows-nat.c (struct windows_nat_target) <pid_to_str>: Change return type. (windows_nat_target::pid_to_str): Change return type. (windows_delete_thread): Update. (windows_nat_target::attach): Update. (windows_nat_target::files_info): Update. * target-delegates.c: Rebuild. * sol-thread.c (class sol_thread_target) <pid_to_str>: Change return type. (sol_thread_target::pid_to_str): Change return type. * remote.c (class remote_target) <pid_to_str>: Change return type. (remote_target::pid_to_str): Change return type. (extended_remote_target::attach, remote_target::remote_stop_ns) (remote_target::remote_notif_remove_queued_reply) (remote_target::push_stop_reply, remote_target::disable_btrace): Update. (extended_remote_target::attach): Update. * remote-sim.c (struct gdbsim_target) <pid_to_str>: Change return type. (gdbsim_target::pid_to_str): Change return type. * ravenscar-thread.c (struct ravenscar_thread_target) <pid_to_str>: Change return type. (ravenscar_thread_target::pid_to_str): Change return type. * procfs.c (class procfs_target) <pid_to_str>: Change return type. (procfs_target::pid_to_str): Change return type. (procfs_target::attach): Update. (procfs_target::detach): Update. (procfs_target::fetch_registers): Update. (procfs_target::store_registers): Update. (procfs_target::wait): Update. (procfs_target::files_info): Update. * obsd-nat.c (obsd_nat_target::pid_to_str): Change return type. * nto-procfs.c (struct nto_procfs_target) <pid_to_str>: Change return type. (nto_procfs_target::pid_to_str): Change return type. (nto_procfs_target::files_info, nto_procfs_target::attach): Update. * linux-thread-db.c (class thread_db_target) <pid_to_str>: Change return type. * linux-nat.c (linux_nat_target::pid_to_str): Change return type. (exit_lwp): Update. (attach_proc_task_lwp_callback, get_detach_signal) (detach_one_lwp, resume_lwp, linux_nat_target::resume) (linux_nat_target::resume, wait_lwp, stop_callback) (maybe_clear_ignore_sigint, stop_wait_callback, status_callback) (save_stop_reason, select_event_lwp, linux_nat_filter_event) (linux_nat_wait_1, resume_stopped_resumed_lwps) (linux_nat_target::wait, linux_nat_stop_lwp): Update. * inf-ptrace.c (inf_ptrace_target::pid_to_str): Change return type. (inf_ptrace_target::attach): Update. (inf_ptrace_target::files_info): Update. * go32-nat.c (struct go32_nat_target) <pid_to_str>: Change return type. (go32_nat_target::pid_to_str): Change return type. * gnu-nat.c (gnu_nat_target::pid_to_str): Change return type. (gnu_nat_target::wait): Update. (gnu_nat_target::wait): Update. (gnu_nat_target::resume): Update. * fbsd-nat.c (fbsd_nat_target::pid_to_str): Change return type. (fbsd_nat_target::wait): Update. * darwin-nat.c (darwin_nat_target::pid_to_str): Change return type. (darwin_nat_target::attach): Update. * corelow.c (class core_target) <pid_to_str>: Change return type. (core_target::pid_to_str): Change return type. * target.c (normal_pid_to_str): Change return type. (default_pid_to_str): Likewise. (target_pid_to_str): Change return type. (target_translate_tls_address): Update. (target_announce_detach): Update. * bsd-uthread.c (struct bsd_uthread_target) <pid_to_str>: Change return type. (bsd_uthread_target::pid_to_str): Change return type. * bsd-kvm.c (class bsd_kvm_target) <pid_to_str>: Change return type. (bsd_kvm_target::pid_to_str): Change return type. * aix-thread.c (class aix_thread_target) <pid_to_str>: Change return type. (aix_thread_target::pid_to_str): Change return type. * target.h (struct target_ops) <pid_to_str>: Change return type. (target_pid_to_str, normal_pid_to_str): Likewise. * obsd-nat.h (class obsd_nat_target) <pid_to_str>: Change return type. * linux-nat.h (class linux_nat_target) <pid_to_str>: Change return type. * inf-ptrace.h (struct inf_ptrace_target) <pid_to_str>: Change return type. * gnu-nat.h (struct gnu_nat_target) <pid_to_str>: Change return type. * fbsd-nat.h (class fbsd_nat_target) <pid_to_str>: Change return type. * darwin-nat.h (class darwin_nat_target) <pid_to_str>: Change return type.
330 lines
10 KiB
C++
330 lines
10 KiB
C++
/* Native debugging support for GNU/Linux (LWP layer).
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Copyright (C) 2000-2019 Free Software Foundation, Inc.
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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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#ifndef LINUX_NAT_H
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#define LINUX_NAT_H
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#include "nat/linux-nat.h"
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#include "inf-ptrace.h"
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#include "target.h"
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#include <signal.h>
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/* A prototype generic GNU/Linux target. A concrete instance should
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override it with local methods. */
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class linux_nat_target : public inf_ptrace_target
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{
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public:
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linux_nat_target ();
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~linux_nat_target () override = 0;
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thread_control_capabilities get_thread_control_capabilities () override
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{ return tc_schedlock; }
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void create_inferior (const char *, const std::string &,
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char **, int) override;
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void attach (const char *, int) override;
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void detach (inferior *, int) override;
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void resume (ptid_t, int, enum gdb_signal) override;
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ptid_t wait (ptid_t, struct target_waitstatus *, int) override;
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void pass_signals (gdb::array_view<const unsigned char>) override;
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enum target_xfer_status xfer_partial (enum target_object object,
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const char *annex,
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gdb_byte *readbuf,
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const gdb_byte *writebuf,
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ULONGEST offset, ULONGEST len,
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ULONGEST *xfered_len) override;
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void kill () override;
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void mourn_inferior () override;
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bool thread_alive (ptid_t ptid) override;
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void update_thread_list () override;
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std::string pid_to_str (ptid_t) override;
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const char *thread_name (struct thread_info *) override;
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struct address_space *thread_address_space (ptid_t) override;
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bool stopped_by_watchpoint () override;
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bool stopped_data_address (CORE_ADDR *) override;
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bool stopped_by_sw_breakpoint () override;
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bool supports_stopped_by_sw_breakpoint () override;
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bool stopped_by_hw_breakpoint () override;
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bool supports_stopped_by_hw_breakpoint () override;
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void thread_events (int) override;
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bool can_async_p () override;
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bool is_async_p () override;
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bool supports_non_stop () override;
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bool always_non_stop_p () override;
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void async (int) override;
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void close () override;
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void stop (ptid_t) override;
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bool supports_multi_process () override;
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bool supports_disable_randomization () override;
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int core_of_thread (ptid_t ptid) override;
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bool filesystem_is_local () override;
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int fileio_open (struct inferior *inf, const char *filename,
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int flags, int mode, int warn_if_slow,
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int *target_errno) override;
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gdb::optional<std::string>
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fileio_readlink (struct inferior *inf,
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const char *filename,
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int *target_errno) override;
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int fileio_unlink (struct inferior *inf,
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const char *filename,
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int *target_errno) override;
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int insert_fork_catchpoint (int) override;
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int remove_fork_catchpoint (int) override;
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int insert_vfork_catchpoint (int) override;
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int remove_vfork_catchpoint (int) override;
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int insert_exec_catchpoint (int) override;
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int remove_exec_catchpoint (int) override;
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int set_syscall_catchpoint (int pid, bool needed, int any_count,
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gdb::array_view<const int> syscall_counts) override;
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char *pid_to_exec_file (int pid) override;
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void post_startup_inferior (ptid_t) override;
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void post_attach (int) override;
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int follow_fork (int, int) override;
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std::vector<static_tracepoint_marker>
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static_tracepoint_markers_by_strid (const char *id) override;
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/* Methods that are meant to overridden by the concrete
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arch-specific target instance. */
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virtual void low_resume (ptid_t ptid, int step, enum gdb_signal sig)
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{ inf_ptrace_target::resume (ptid, step, sig); }
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virtual bool low_stopped_by_watchpoint ()
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{ return false; }
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virtual bool low_stopped_data_address (CORE_ADDR *addr_p)
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{ return false; }
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/* The method to call, if any, when a new thread is attached. */
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virtual void low_new_thread (struct lwp_info *)
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{}
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/* The method to call, if any, when a thread is destroyed. */
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virtual void low_delete_thread (struct arch_lwp_info *lp)
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{
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gdb_assert (lp == NULL);
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}
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/* The method to call, if any, when a new fork is attached. */
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virtual void low_new_fork (struct lwp_info *parent, pid_t child_pid)
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{}
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/* The method to call, if any, when a process is no longer
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attached. */
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virtual void low_forget_process (pid_t pid)
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{}
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/* Hook to call prior to resuming a thread. */
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virtual void low_prepare_to_resume (struct lwp_info *)
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{}
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/* Convert a ptrace/host siginfo object, into/from the siginfo in
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the layout of the inferiors' architecture. Returns true if any
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conversion was done; false otherwise, in which case the caller
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does a straight memcpy. If DIRECTION is 1, then copy from INF to
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PTRACE. If DIRECTION is 0, copy from PTRACE to INF. */
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virtual bool low_siginfo_fixup (siginfo_t *ptrace, gdb_byte *inf,
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int direction)
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{ return false; }
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/* SIGTRAP-like breakpoint status events recognizer. The default
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recognizes SIGTRAP only. */
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virtual bool low_status_is_event (int status);
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};
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/* The final/concrete instance. */
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extern linux_nat_target *linux_target;
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struct arch_lwp_info;
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/* Structure describing an LWP. This is public only for the purposes
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of ALL_LWPS; target-specific code should generally not access it
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directly. */
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struct lwp_info
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{
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/* The process id of the LWP. This is a combination of the LWP id
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and overall process id. */
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ptid_t ptid;
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/* If this flag is set, we need to set the event request flags the
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next time we see this LWP stop. */
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int must_set_ptrace_flags;
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/* Non-zero if we sent this LWP a SIGSTOP (but the LWP didn't report
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it back yet). */
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int signalled;
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/* Non-zero if this LWP is stopped. */
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int stopped;
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/* Non-zero if this LWP will be/has been resumed. Note that an LWP
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can be marked both as stopped and resumed at the same time. This
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happens if we try to resume an LWP that has a wait status
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pending. We shouldn't let the LWP run until that wait status has
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been processed, but we should not report that wait status if GDB
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didn't try to let the LWP run. */
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int resumed;
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/* The last resume GDB requested on this thread. */
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enum resume_kind last_resume_kind;
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/* If non-zero, a pending wait status. */
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int status;
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/* When 'stopped' is set, this is where the lwp last stopped, with
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decr_pc_after_break already accounted for. If the LWP is
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running, and stepping, this is the address at which the lwp was
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resumed (that is, it's the previous stop PC). If the LWP is
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running and not stepping, this is 0. */
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CORE_ADDR stop_pc;
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/* Non-zero if we were stepping this LWP. */
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int step;
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/* The reason the LWP last stopped, if we need to track it
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(breakpoint, watchpoint, etc.) */
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enum target_stop_reason stop_reason;
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/* On architectures where it is possible to know the data address of
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a triggered watchpoint, STOPPED_DATA_ADDRESS_P is non-zero, and
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STOPPED_DATA_ADDRESS contains such data address. Otherwise,
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STOPPED_DATA_ADDRESS_P is false, and STOPPED_DATA_ADDRESS is
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undefined. Only valid if STOPPED_BY_WATCHPOINT is true. */
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int stopped_data_address_p;
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CORE_ADDR stopped_data_address;
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/* Non-zero if we expect a duplicated SIGINT. */
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int ignore_sigint;
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/* If WAITSTATUS->KIND != TARGET_WAITKIND_SPURIOUS, the waitstatus
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for this LWP's last event. This may correspond to STATUS above,
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or to a local variable in lin_lwp_wait. */
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struct target_waitstatus waitstatus;
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/* Signal whether we are in a SYSCALL_ENTRY or
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in a SYSCALL_RETURN event.
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Values:
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- TARGET_WAITKIND_SYSCALL_ENTRY
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- TARGET_WAITKIND_SYSCALL_RETURN */
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enum target_waitkind syscall_state;
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/* The processor core this LWP was last seen on. */
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int core;
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/* Arch-specific additions. */
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struct arch_lwp_info *arch_private;
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/* Previous and next pointers in doubly-linked list of known LWPs,
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sorted by reverse creation order. */
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struct lwp_info *prev;
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struct lwp_info *next;
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};
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/* The global list of LWPs, for ALL_LWPS. Unlike the threads list,
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there is always at least one LWP on the list while the GNU/Linux
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native target is active. */
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extern struct lwp_info *lwp_list;
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/* Does the current host support PTRACE_GETREGSET? */
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extern enum tribool have_ptrace_getregset;
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/* Iterate over each active thread (light-weight process). */
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#define ALL_LWPS(LP) \
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for ((LP) = lwp_list; \
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(LP) != NULL; \
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(LP) = (LP)->next)
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/* Attempt to initialize libthread_db. */
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void check_for_thread_db (void);
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/* Called from the LWP layer to inform the thread_db layer that PARENT
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spawned CHILD. Both LWPs are currently stopped. This function
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does whatever is required to have the child LWP under the
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thread_db's control --- e.g., enabling event reporting. Returns
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true on success, false if the process isn't using libpthread. */
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extern int thread_db_notice_clone (ptid_t parent, ptid_t child);
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/* Return the set of signals used by the threads library. */
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extern void lin_thread_get_thread_signals (sigset_t *mask);
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/* Find process PID's pending signal set from /proc/pid/status. */
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void linux_proc_pending_signals (int pid, sigset_t *pending,
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sigset_t *blocked, sigset_t *ignored);
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/* For linux_stop_lwp see nat/linux-nat.h. */
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/* Stop all LWPs, synchronously. (Any events that trigger while LWPs
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are being stopped are left pending.) */
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extern void linux_stop_and_wait_all_lwps (void);
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/* Set resumed LWPs running again, as they were before being stopped
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with linux_stop_and_wait_all_lwps. (LWPS with pending events are
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left stopped.) */
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extern void linux_unstop_all_lwps (void);
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/* Update linux-nat internal state when changing from one fork
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to another. */
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void linux_nat_switch_fork (ptid_t new_ptid);
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/* Store the saved siginfo associated with PTID in *SIGINFO.
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Return 1 if it was retrieved successfully, 0 otherwise (*SIGINFO is
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uninitialized in such case). */
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int linux_nat_get_siginfo (ptid_t ptid, siginfo_t *siginfo);
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#endif /* LINUX_NAT_H */
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