mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-27 04:52:05 +08:00
00b400574a
Using std::string here makes the string building simpler thank playing with char*. A stack allocation is replaced with heap allocation, but I don't think this is really performance-critical code. gdb/ChangeLog: * build-id.c (build_id_to_debug_bfd): Use std::string.
154 lines
3.9 KiB
C
154 lines
3.9 KiB
C
/* build-id-related functions.
|
|
|
|
Copyright (C) 1991-2018 Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#include "defs.h"
|
|
#include "bfd.h"
|
|
#include "gdb_bfd.h"
|
|
#include "build-id.h"
|
|
#include "gdb_vecs.h"
|
|
#include "symfile.h"
|
|
#include "objfiles.h"
|
|
#include "filenames.h"
|
|
#include "gdbcore.h"
|
|
|
|
/* See build-id.h. */
|
|
|
|
const struct bfd_build_id *
|
|
build_id_bfd_get (bfd *abfd)
|
|
{
|
|
if (!bfd_check_format (abfd, bfd_object))
|
|
return NULL;
|
|
|
|
if (abfd->build_id != NULL)
|
|
return abfd->build_id;
|
|
|
|
/* No build-id */
|
|
return NULL;
|
|
}
|
|
|
|
/* See build-id.h. */
|
|
|
|
int
|
|
build_id_verify (bfd *abfd, size_t check_len, const bfd_byte *check)
|
|
{
|
|
const struct bfd_build_id *found;
|
|
int retval = 0;
|
|
|
|
found = build_id_bfd_get (abfd);
|
|
|
|
if (found == NULL)
|
|
warning (_("File \"%s\" has no build-id, file skipped"),
|
|
bfd_get_filename (abfd));
|
|
else if (found->size != check_len
|
|
|| memcmp (found->data, check, found->size) != 0)
|
|
warning (_("File \"%s\" has a different build-id, file skipped"),
|
|
bfd_get_filename (abfd));
|
|
else
|
|
retval = 1;
|
|
|
|
return retval;
|
|
}
|
|
|
|
/* See build-id.h. */
|
|
|
|
gdb_bfd_ref_ptr
|
|
build_id_to_debug_bfd (size_t build_id_len, const bfd_byte *build_id)
|
|
{
|
|
gdb_bfd_ref_ptr abfd;
|
|
|
|
/* Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
|
|
cause "/.build-id/..." lookups. */
|
|
|
|
std::vector<gdb::unique_xmalloc_ptr<char>> debugdir_vec
|
|
= dirnames_to_char_ptr_vec (debug_file_directory);
|
|
|
|
for (const gdb::unique_xmalloc_ptr<char> &debugdir : debugdir_vec)
|
|
{
|
|
const gdb_byte *data = build_id;
|
|
size_t size = build_id_len;
|
|
|
|
std::string link = debugdir.get ();
|
|
link += "/.build-id/";
|
|
|
|
if (size > 0)
|
|
{
|
|
size--;
|
|
string_appendf (link, "%02x/", (unsigned) *data++);
|
|
}
|
|
|
|
while (size-- > 0)
|
|
string_appendf (link, "%02x", (unsigned) *data++);
|
|
|
|
link += ".debug";
|
|
|
|
if (separate_debug_file_debug)
|
|
printf_unfiltered (_(" Trying %s\n"), link.c_str ());
|
|
|
|
/* lrealpath() is expensive even for the usually non-existent files. */
|
|
gdb::unique_xmalloc_ptr<char> filename;
|
|
if (access (link.c_str (), F_OK) == 0)
|
|
filename.reset (lrealpath (link.c_str ()));
|
|
|
|
if (filename == NULL)
|
|
continue;
|
|
|
|
/* We expect to be silent on the non-existing files. */
|
|
abfd = gdb_bfd_open (filename.get (), gnutarget, -1);
|
|
|
|
if (abfd == NULL)
|
|
continue;
|
|
|
|
if (build_id_verify (abfd.get(), build_id_len, build_id))
|
|
break;
|
|
|
|
abfd.release ();
|
|
}
|
|
|
|
return abfd;
|
|
}
|
|
|
|
/* See build-id.h. */
|
|
|
|
std::string
|
|
find_separate_debug_file_by_buildid (struct objfile *objfile)
|
|
{
|
|
const struct bfd_build_id *build_id;
|
|
|
|
build_id = build_id_bfd_get (objfile->obfd);
|
|
if (build_id != NULL)
|
|
{
|
|
if (separate_debug_file_debug)
|
|
printf_unfiltered (_("\nLooking for separate debug info (build-id) for "
|
|
"%s\n"), objfile_name (objfile));
|
|
|
|
gdb_bfd_ref_ptr abfd (build_id_to_debug_bfd (build_id->size,
|
|
build_id->data));
|
|
/* Prevent looping on a stripped .debug file. */
|
|
if (abfd != NULL
|
|
&& filename_cmp (bfd_get_filename (abfd.get ()),
|
|
objfile_name (objfile)) == 0)
|
|
warning (_("\"%s\": separate debug info file has no debug info"),
|
|
bfd_get_filename (abfd.get ()));
|
|
else if (abfd != NULL)
|
|
return std::string (bfd_get_filename (abfd.get ()));
|
|
}
|
|
|
|
return std::string ();
|
|
}
|