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This patch uses new BFD support for detecting build-ids in core files. After this patch, it is possible to run gdb with only the core file, and gdb will automatically load the executable and debug info [example from tests]: $ gdb -nx -q (gdb) core-file corefile-buildid.core [New LWP 29471] Reading symbols from gdb.base/corefile-buildid/debugdir-exec/.build-id/36/fe5722c5a7ca3ac746a84e223c6a2a69193a24... Core was generated by `outputs/gdb.base/coref'. Program terminated with signal SIGABRT, Aborted. (gdb) This work is based on functionality available in Fedora originally written by Jan Kratochvil. Regression tested on buildbot. gdb/ChangeLog: 2019-12-07 Keith Seitz <keiths@redhat.com> * build-id.c (build_id_bfd_get): Permit bfd_core, too. (build_id_to_debug_bfd): Make static, rewriting to use build_id_to_bfd_suffix. (build_id_to_bfd_suffix): Copy of build_id_to_debug_bfd, adding `suffix' parameter. Append SUFFIX to file names when searching for matching files. (build_id_to_debug_bfd): Use build_id_to_bfd_suffix. (build_id_to_exec_bfd): Likewise. * build-id.h (build_id_to_debug_bfd): Clarify that function searches for BFD of debug info file. (build_id_to_exec_bfd): Declare. * corelow.c: Include build-id.h. (locate_exec_from_corefile_build_id): New function. (core_target_open): If no executable BFD is found, search for a core file BFD using build-id. gdb/testsuite/ChangeLog: 2019-12-07 Keith Seitz <keiths@redhat.com> * gdb.base/corefile-buildid-shlib-shr.c: New file. * gdb.base/corefile-buildid-shlib.c: New file. * gdb.base/corefile-buildid.c: New file. * gdb.base/corefile-buildid.exp: New file. Change-Id: I15e9e8e58f10c68b5cae55e2eba58df1e8aef529
68 lines
2.2 KiB
C++
68 lines
2.2 KiB
C++
/* build-id-related functions.
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Copyright (C) 1991-2019 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 BUILD_ID_H
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#define BUILD_ID_H
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#include "gdb_bfd.h"
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#include "gdbsupport/rsp-low.h"
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/* Locate NT_GNU_BUILD_ID from ABFD and return its content. */
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extern const struct bfd_build_id *build_id_bfd_get (bfd *abfd);
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/* Return true if ABFD has NT_GNU_BUILD_ID matching the CHECK value.
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Otherwise, issue a warning and return false. */
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extern int build_id_verify (bfd *abfd,
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size_t check_len, const bfd_byte *check);
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/* Find and open a BFD for a debuginfo file given a build-id. If no BFD
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can be found, return NULL. */
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extern gdb_bfd_ref_ptr build_id_to_debug_bfd (size_t build_id_len,
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const bfd_byte *build_id);
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/* Find and open a BFD for an executable file given a build-id. If no BFD
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can be found, return NULL. The returned reference to the BFD must be
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released by the caller. */
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extern gdb_bfd_ref_ptr build_id_to_exec_bfd (size_t build_id_len,
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const bfd_byte *build_id);
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/* Find the separate debug file for OBJFILE, by using the build-id
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associated with OBJFILE's BFD. If successful, returns the file name for the
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separate debug file, otherwise, return an empty string. */
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extern std::string find_separate_debug_file_by_buildid
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(struct objfile *objfile);
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/* Return an hex-string representation of BUILD_ID. */
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static inline std::string
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build_id_to_string (const bfd_build_id *build_id)
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{
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gdb_assert (build_id != NULL);
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return bin2hex (build_id->data, build_id->size);
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}
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#endif /* BUILD_ID_H */
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