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268a13a5a3
This is the next patch in the ongoing series to move gdbsever to the top level. This patch just renames the "common" directory. The idea is to do this move in two parts: first rename the directory (this patch), then move the directory to the top. This approach makes the patches a bit more tractable. I chose the name "gdbsupport" for the directory. However, as this patch was largely written by sed, we could pick a new name without too much difficulty. Tested by the buildbot. gdb/ChangeLog 2019-07-09 Tom Tromey <tom@tromey.com> * contrib/ari/gdb_ari.sh: Change common to gdbsupport. * configure: Rebuild. * configure.ac: Change common to gdbsupport. * gdbsupport: Rename from common. * acinclude.m4: Change common to gdbsupport. * Makefile.in (CONFIG_SRC_SUBDIR, COMMON_SFILES) (HFILES_NO_SRCDIR, stamp-version, ALLDEPFILES): Change common to gdbsupport. * aarch64-tdep.c, ada-lang.c, ada-lang.h, agent.c, alloc.c, amd64-darwin-tdep.c, amd64-dicos-tdep.c, amd64-fbsd-nat.c, amd64-fbsd-tdep.c, amd64-linux-nat.c, amd64-linux-tdep.c, amd64-nbsd-tdep.c, amd64-obsd-tdep.c, amd64-sol2-tdep.c, amd64-tdep.c, amd64-windows-tdep.c, arch-utils.c, arch/aarch64-insn.c, arch/aarch64.c, arch/aarch64.h, arch/amd64.c, arch/amd64.h, arch/arm-get-next-pcs.c, arch/arm-linux.c, arch/arm.c, arch/i386.c, arch/i386.h, arch/ppc-linux-common.c, arch/riscv.c, arch/riscv.h, arch/tic6x.c, arm-tdep.c, auto-load.c, auxv.c, ax-gdb.c, ax-general.c, ax.h, breakpoint.c, breakpoint.h, btrace.c, btrace.h, build-id.c, build-id.h, c-lang.h, charset.c, charset.h, cli/cli-cmds.c, cli/cli-cmds.h, cli/cli-decode.c, cli/cli-dump.c, cli/cli-option.h, cli/cli-script.c, coff-pe-read.c, command.h, compile/compile-c-support.c, compile/compile-c.h, compile/compile-cplus-symbols.c, compile/compile-cplus-types.c, compile/compile-cplus.h, compile/compile-loc2c.c, compile/compile.c, completer.c, completer.h, contrib/ari/gdb_ari.sh, corefile.c, corelow.c, cp-support.c, cp-support.h, cp-valprint.c, csky-tdep.c, ctf.c, darwin-nat.c, debug.c, defs.h, disasm-selftests.c, disasm.c, disasm.h, dtrace-probe.c, dwarf-index-cache.c, dwarf-index-cache.h, dwarf-index-write.c, dwarf2-frame.c, dwarf2expr.c, dwarf2loc.c, dwarf2read.c, event-loop.c, event-top.c, exceptions.c, exec.c, extension.h, fbsd-nat.c, features/aarch64-core.c, features/aarch64-fpu.c, features/aarch64-pauth.c, features/aarch64-sve.c, features/i386/32bit-avx.c, features/i386/32bit-avx512.c, features/i386/32bit-core.c, features/i386/32bit-linux.c, features/i386/32bit-mpx.c, features/i386/32bit-pkeys.c, features/i386/32bit-segments.c, features/i386/32bit-sse.c, features/i386/64bit-avx.c, features/i386/64bit-avx512.c, features/i386/64bit-core.c, features/i386/64bit-linux.c, features/i386/64bit-mpx.c, features/i386/64bit-pkeys.c, features/i386/64bit-segments.c, features/i386/64bit-sse.c, features/i386/x32-core.c, features/riscv/32bit-cpu.c, features/riscv/32bit-csr.c, features/riscv/32bit-fpu.c, features/riscv/64bit-cpu.c, features/riscv/64bit-csr.c, features/riscv/64bit-fpu.c, features/tic6x-c6xp.c, features/tic6x-core.c, features/tic6x-gp.c, filename-seen-cache.h, findcmd.c, findvar.c, fork-child.c, gcore.c, gdb_bfd.c, gdb_bfd.h, gdb_proc_service.h, gdb_regex.c, gdb_select.h, gdb_usleep.c, gdbarch-selftests.c, gdbthread.h, gdbtypes.h, gnu-nat.c, go32-nat.c, guile/guile.c, guile/scm-ports.c, guile/scm-safe-call.c, guile/scm-type.c, i386-fbsd-nat.c, i386-fbsd-tdep.c, i386-go32-tdep.c, i386-linux-nat.c, i386-linux-tdep.c, i386-tdep.c, i387-tdep.c, ia64-libunwind-tdep.c, ia64-linux-nat.c, inf-child.c, inf-ptrace.c, infcall.c, infcall.h, infcmd.c, inferior-iter.h, inferior.c, inferior.h, inflow.c, inflow.h, infrun.c, infrun.h, inline-frame.c, language.h, linespec.c, linux-fork.c, linux-nat.c, linux-tdep.c, linux-thread-db.c, location.c, machoread.c, macrotab.h, main.c, maint.c, maint.h, memattr.c, memrange.h, mi/mi-cmd-break.h, mi/mi-cmd-env.c, mi/mi-cmd-stack.c, mi/mi-cmd-var.c, mi/mi-interp.c, mi/mi-main.c, mi/mi-parse.h, minsyms.c, mips-linux-tdep.c, namespace.h, nat/aarch64-linux-hw-point.c, nat/aarch64-linux-hw-point.h, nat/aarch64-linux.c, nat/aarch64-sve-linux-ptrace.c, nat/amd64-linux-siginfo.c, nat/fork-inferior.c, nat/linux-btrace.c, nat/linux-btrace.h, nat/linux-namespaces.c, nat/linux-nat.h, nat/linux-osdata.c, nat/linux-personality.c, nat/linux-procfs.c, nat/linux-ptrace.c, nat/linux-ptrace.h, nat/linux-waitpid.c, nat/mips-linux-watch.c, nat/mips-linux-watch.h, nat/ppc-linux.c, nat/x86-dregs.c, nat/x86-dregs.h, nat/x86-linux-dregs.c, nat/x86-linux.c, nto-procfs.c, nto-tdep.c, objfile-flags.h, objfiles.c, objfiles.h, obsd-nat.c, observable.h, osdata.c, p-valprint.c, parse.c, parser-defs.h, ppc-linux-nat.c, printcmd.c, probe.c, proc-api.c, procfs.c, producer.c, progspace.h, psymtab.h, python/py-framefilter.c, python/py-inferior.c, python/py-ref.h, python/py-type.c, python/python.c, record-btrace.c, record-full.c, record.c, record.h, regcache-dump.c, regcache.c, regcache.h, remote-fileio.c, remote-fileio.h, remote-sim.c, remote.c, riscv-tdep.c, rs6000-aix-tdep.c, rust-exp.y, s12z-tdep.c, selftest-arch.c, ser-base.c, ser-event.c, ser-pipe.c, ser-tcp.c, ser-unix.c, skip.c, solib-aix.c, solib-target.c, solib.c, source-cache.c, source.c, source.h, sparc-nat.c, spu-linux-nat.c, stack.c, stap-probe.c, symfile-add-flags.h, symfile.c, symfile.h, symtab.c, symtab.h, target-descriptions.c, target-descriptions.h, target-memory.c, target.c, target.h, target/waitstatus.c, target/waitstatus.h, thread-iter.h, thread.c, tilegx-tdep.c, top.c, top.h, tracefile-tfile.c, tracefile.c, tracepoint.c, tracepoint.h, tui/tui-io.c, ui-file.c, ui-out.h, unittests/array-view-selftests.c, unittests/child-path-selftests.c, unittests/cli-utils-selftests.c, unittests/common-utils-selftests.c, unittests/copy_bitwise-selftests.c, unittests/environ-selftests.c, unittests/format_pieces-selftests.c, unittests/function-view-selftests.c, unittests/lookup_name_info-selftests.c, unittests/memory-map-selftests.c, unittests/memrange-selftests.c, unittests/mkdir-recursive-selftests.c, unittests/observable-selftests.c, unittests/offset-type-selftests.c, unittests/optional-selftests.c, unittests/parse-connection-spec-selftests.c, unittests/ptid-selftests.c, unittests/rsp-low-selftests.c, unittests/scoped_fd-selftests.c, unittests/scoped_mmap-selftests.c, unittests/scoped_restore-selftests.c, unittests/string_view-selftests.c, unittests/style-selftests.c, unittests/tracepoint-selftests.c, unittests/unpack-selftests.c, unittests/utils-selftests.c, unittests/xml-utils-selftests.c, utils.c, utils.h, valarith.c, valops.c, valprint.c, value.c, value.h, varobj.c, varobj.h, windows-nat.c, x86-linux-nat.c, xml-support.c, xml-support.h, xml-tdesc.h, xstormy16-tdep.c, xtensa-linux-nat.c, dwarf2read.h: Change common to gdbsupport. gdb/gdbserver/ChangeLog 2019-07-09 Tom Tromey <tom@tromey.com> * configure: Rebuild. * configure.ac: Change common to gdbsupport. * acinclude.m4: Change common to gdbsupport. * Makefile.in (SFILES, OBS, GDBREPLAY_OBS, IPA_OBJS) (version-generated.c, gdbsupport/%-ipa.o, gdbsupport/%.o): Change common to gdbsupport. * ax.c, event-loop.c, fork-child.c, gdb_proc_service.h, gdbreplay.c, gdbthread.h, hostio-errno.c, hostio.c, i387-fp.c, inferiors.c, inferiors.h, linux-aarch64-tdesc-selftest.c, linux-amd64-ipa.c, linux-i386-ipa.c, linux-low.c, linux-tic6x-low.c, linux-x86-low.c, linux-x86-tdesc-selftest.c, linux-x86-tdesc.c, lynx-i386-low.c, lynx-low.c, mem-break.h, nto-x86-low.c, regcache.c, regcache.h, remote-utils.c, server.c, server.h, spu-low.c, symbol.c, target.h, tdesc.c, tdesc.h, thread-db.c, tracepoint.c, win32-i386-low.c, win32-low.c: Change common to gdbsupport.
359 lines
13 KiB
C++
359 lines
13 KiB
C++
/* Program and address space management, for GDB, the GNU debugger.
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Copyright (C) 2009-2019 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 PROGSPACE_H
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#define PROGSPACE_H
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#include "target.h"
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#include "gdbsupport/vec.h"
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#include "gdb_bfd.h"
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#include "gdbsupport/gdb_vecs.h"
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#include "registry.h"
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#include "gdbsupport/next-iterator.h"
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#include "gdbsupport/safe-iterator.h"
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struct target_ops;
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struct bfd;
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struct objfile;
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struct inferior;
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struct exec;
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struct address_space;
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struct program_space_data;
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struct address_space_data;
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/* A program space represents a symbolic view of an address space.
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Roughly speaking, it holds all the data associated with a
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non-running-yet program (main executable, main symbols), and when
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an inferior is running and is bound to it, includes the list of its
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mapped in shared libraries.
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In the traditional debugging scenario, there's a 1-1 correspondence
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among program spaces, inferiors and address spaces, like so:
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pspace1 (prog1) <--> inf1(pid1) <--> aspace1
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In the case of debugging more than one traditional unix process or
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program, we still have:
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|-----------------+------------+---------|
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| pspace1 (prog1) | inf1(pid1) | aspace1 |
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|----------------------------------------|
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| pspace2 (prog1) | no inf yet | aspace2 |
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|-----------------+------------+---------|
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| pspace3 (prog2) | inf2(pid2) | aspace3 |
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|-----------------+------------+---------|
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In the former example, if inf1 forks (and GDB stays attached to
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both processes), the new child will have its own program and
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address spaces. Like so:
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|-----------------+------------+---------|
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| pspace1 (prog1) | inf1(pid1) | aspace1 |
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|-----------------+------------+---------|
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| pspace2 (prog1) | inf2(pid2) | aspace2 |
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|-----------------+------------+---------|
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However, had inf1 from the latter case vforked instead, it would
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share the program and address spaces with its parent, until it
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execs or exits, like so:
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|-----------------+------------+---------|
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| pspace1 (prog1) | inf1(pid1) | aspace1 |
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| | inf2(pid2) | |
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|-----------------+------------+---------|
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When the vfork child execs, it is finally given new program and
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address spaces.
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|-----------------+------------+---------|
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| pspace1 (prog1) | inf1(pid1) | aspace1 |
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|-----------------+------------+---------|
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| pspace2 (prog1) | inf2(pid2) | aspace2 |
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|-----------------+------------+---------|
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There are targets where the OS (if any) doesn't provide memory
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management or VM protection, where all inferiors share the same
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address space --- e.g. uClinux. GDB models this by having all
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inferiors share the same address space, but, giving each its own
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program space, like so:
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|-----------------+------------+---------|
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| pspace1 (prog1) | inf1(pid1) | |
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|-----------------+------------+ |
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| pspace2 (prog1) | inf2(pid2) | aspace1 |
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|-----------------+------------+ |
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| pspace3 (prog2) | inf3(pid3) | |
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|-----------------+------------+---------|
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The address space sharing matters for run control and breakpoints
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management. E.g., did we just hit a known breakpoint that we need
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to step over? Is this breakpoint a duplicate of this other one, or
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do I need to insert a trap?
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Then, there are targets where all symbols look the same for all
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inferiors, although each has its own address space, as e.g.,
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Ericsson DICOS. In such case, the model is:
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|---------+------------+---------|
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| | inf1(pid1) | aspace1 |
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| +------------+---------|
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| pspace | inf2(pid2) | aspace2 |
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| +------------+---------|
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| | inf3(pid3) | aspace3 |
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|---------+------------+---------|
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Note however, that the DICOS debug API takes care of making GDB
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believe that breakpoints are "global". That is, although each
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process does have its own private copy of data symbols (just like a
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bunch of forks), to the breakpoints module, all processes share a
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single address space, so all breakpoints set at the same address
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are duplicates of each other, even breakpoints set in the data
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space (e.g., call dummy breakpoints placed on stack). This allows
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a simplification in the spaces implementation: we avoid caring for
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a many-many links between address and program spaces. Either
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there's a single address space bound to the program space
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(traditional unix/uClinux), or, in the DICOS case, the address
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space bound to the program space is mostly ignored. */
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/* The program space structure. */
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struct program_space
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{
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program_space (address_space *aspace_);
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~program_space ();
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typedef next_adapter<struct objfile> objfiles_range;
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/* Return an iterarable object that can be used to iterate over all
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objfiles. The basic use is in a foreach, like:
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for (objfile *objf : pspace->objfiles ()) { ... } */
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objfiles_range objfiles ()
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{
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return objfiles_range (objfiles_head);
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}
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typedef next_adapter<struct objfile,
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basic_safe_iterator<next_iterator<objfile>>>
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objfiles_safe_range;
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/* An iterable object that can be used to iterate over all objfiles.
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The basic use is in a foreach, like:
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for (objfile *objf : pspace->objfiles_safe ()) { ... }
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This variant uses a basic_safe_iterator so that objfiles can be
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deleted during iteration. */
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objfiles_safe_range objfiles_safe ()
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{
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return objfiles_safe_range (objfiles_head);
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}
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/* Pointer to next in linked list. */
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struct program_space *next = NULL;
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/* Unique ID number. */
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int num = 0;
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/* The main executable loaded into this program space. This is
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managed by the exec target. */
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/* The BFD handle for the main executable. */
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bfd *ebfd = NULL;
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/* The last-modified time, from when the exec was brought in. */
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long ebfd_mtime = 0;
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/* Similar to bfd_get_filename (exec_bfd) but in original form given
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by user, without symbolic links and pathname resolved.
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It needs to be freed by xfree. It is not NULL iff EBFD is not NULL. */
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char *pspace_exec_filename = NULL;
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/* Binary file diddling handle for the core file. */
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gdb_bfd_ref_ptr cbfd;
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/* The address space attached to this program space. More than one
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program space may be bound to the same address space. In the
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traditional unix-like debugging scenario, this will usually
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match the address space bound to the inferior, and is mostly
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used by the breakpoints module for address matches. If the
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target shares a program space for all inferiors and breakpoints
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are global, then this field is ignored (we don't currently
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support inferiors sharing a program space if the target doesn't
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make breakpoints global). */
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struct address_space *aspace = NULL;
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/* True if this program space's section offsets don't yet represent
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the final offsets of the "live" address space (that is, the
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section addresses still require the relocation offsets to be
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applied, and hence we can't trust the section addresses for
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anything that pokes at live memory). E.g., for qOffsets
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targets, or for PIE executables, until we connect and ask the
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target for the final relocation offsets, the symbols we've used
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to set breakpoints point at the wrong addresses. */
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int executing_startup = 0;
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/* True if no breakpoints should be inserted in this program
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space. */
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int breakpoints_not_allowed = 0;
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/* The object file that the main symbol table was loaded from
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(e.g. the argument to the "symbol-file" or "file" command). */
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struct objfile *symfile_object_file = NULL;
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/* All known objfiles are kept in a linked list. This points to
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the head of this list. */
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struct objfile *objfiles_head = NULL;
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/* The set of target sections matching the sections mapped into
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this program space. Managed by both exec_ops and solib.c. */
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struct target_section_table target_sections {};
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/* List of shared objects mapped into this space. Managed by
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solib.c. */
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struct so_list *so_list = NULL;
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/* Number of calls to solib_add. */
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unsigned int solib_add_generation = 0;
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/* When an solib is added, it is also added to this vector. This
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is so we can properly report solib changes to the user. */
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std::vector<struct so_list *> added_solibs;
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/* When an solib is removed, its name is added to this vector.
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This is so we can properly report solib changes to the user. */
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std::vector<std::string> deleted_solibs;
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/* Per pspace data-pointers required by other GDB modules. */
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REGISTRY_FIELDS {};
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};
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/* An address space. It is used for comparing if
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pspaces/inferior/threads see the same address space and for
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associating caches to each address space. */
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struct address_space
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{
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int num;
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/* Per aspace data-pointers required by other GDB modules. */
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REGISTRY_FIELDS;
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};
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/* The object file that the main symbol table was loaded from (e.g. the
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argument to the "symbol-file" or "file" command). */
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#define symfile_objfile current_program_space->symfile_object_file
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/* All known objfiles are kept in a linked list. This points to the
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root of this list. */
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#define object_files current_program_space->objfiles_head
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/* The set of target sections matching the sections mapped into the
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current program space. */
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#define current_target_sections (¤t_program_space->target_sections)
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/* The list of all program spaces. There's always at least one. */
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extern struct program_space *program_spaces;
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/* The current program space. This is always non-null. */
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extern struct program_space *current_program_space;
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#define ALL_PSPACES(pspace) \
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for ((pspace) = program_spaces; (pspace) != NULL; (pspace) = (pspace)->next)
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/* Remove a program space from the program spaces list and release it. It is
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an error to call this function while PSPACE is the current program space. */
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extern void delete_program_space (struct program_space *pspace);
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/* Returns the number of program spaces listed. */
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extern int number_of_program_spaces (void);
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/* Returns true iff there's no inferior bound to PSPACE. */
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extern int program_space_empty_p (struct program_space *pspace);
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/* Copies program space SRC to DEST. Copies the main executable file,
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and the main symbol file. Returns DEST. */
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extern struct program_space *clone_program_space (struct program_space *dest,
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struct program_space *src);
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|
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/* Sets PSPACE as the current program space. This is usually used
|
|
instead of set_current_space_and_thread when the current
|
|
thread/inferior is not important for the operations that follow.
|
|
E.g., when accessing the raw symbol tables. If memory access is
|
|
required, then you should use switch_to_program_space_and_thread.
|
|
Otherwise, it is the caller's responsibility to make sure that the
|
|
currently selected inferior/thread matches the selected program
|
|
space. */
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extern void set_current_program_space (struct program_space *pspace);
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|
|
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/* Save/restore the current program space. */
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|
|
|
class scoped_restore_current_program_space
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|
{
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|
public:
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|
scoped_restore_current_program_space ()
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|
: m_saved_pspace (current_program_space)
|
|
{}
|
|
|
|
~scoped_restore_current_program_space ()
|
|
{ set_current_program_space (m_saved_pspace); }
|
|
|
|
DISABLE_COPY_AND_ASSIGN (scoped_restore_current_program_space);
|
|
|
|
private:
|
|
program_space *m_saved_pspace;
|
|
};
|
|
|
|
/* Create a new address space object, and add it to the list. */
|
|
extern struct address_space *new_address_space (void);
|
|
|
|
/* Maybe create a new address space object, and add it to the list, or
|
|
return a pointer to an existing address space, in case inferiors
|
|
share an address space. */
|
|
extern struct address_space *maybe_new_address_space (void);
|
|
|
|
/* Returns the integer address space id of ASPACE. */
|
|
extern int address_space_num (struct address_space *aspace);
|
|
|
|
/* Update all program spaces matching to address spaces. The user may
|
|
have created several program spaces, and loaded executables into
|
|
them before connecting to the target interface that will create the
|
|
inferiors. All that happens before GDB has a chance to know if the
|
|
inferiors will share an address space or not. Call this after
|
|
having connected to the target interface and having fetched the
|
|
target description, to fixup the program/address spaces
|
|
mappings. */
|
|
extern void update_address_spaces (void);
|
|
|
|
/* Reset saved solib data at the start of an solib event. This lets
|
|
us properly collect the data when calling solib_add, so it can then
|
|
later be printed. */
|
|
extern void clear_program_space_solib_cache (struct program_space *);
|
|
|
|
/* Keep a registry of per-pspace data-pointers required by other GDB
|
|
modules. */
|
|
|
|
DECLARE_REGISTRY (program_space);
|
|
|
|
/* Keep a registry of per-aspace data-pointers required by other GDB
|
|
modules. */
|
|
|
|
DECLARE_REGISTRY (address_space);
|
|
|
|
#endif
|