/* build-id-related functions.
- Copyright (C) 1991-2019 Free Software Foundation, Inc.
+ Copyright (C) 1991-2020 Free Software Foundation, Inc.
This file is part of GDB.
#include "bfd.h"
#include "gdb_bfd.h"
#include "build-id.h"
-#include "gdb_vecs.h"
+#include "gdbsupport/gdb_vecs.h"
#include "symfile.h"
#include "objfiles.h"
#include "filenames.h"
const struct bfd_build_id *
build_id_bfd_get (bfd *abfd)
{
- if (!bfd_check_format (abfd, bfd_object))
+ if (!bfd_check_format (abfd, bfd_object)
+ && !bfd_check_format (abfd, bfd_core))
return NULL;
if (abfd->build_id != NULL)
return retval;
}
-/* See build-id.h. */
+/* Helper for build_id_to_debug_bfd. LINK is a path to a potential
+ build-id-based separate debug file, potentially a symlink to the real file.
+ If the file exists and matches BUILD_ID, return a BFD reference to it. */
-gdb_bfd_ref_ptr
-build_id_to_debug_bfd (size_t build_id_len, const bfd_byte *build_id)
+static gdb_bfd_ref_ptr
+build_id_to_debug_bfd_1 (const std::string &link, size_t build_id_len,
+ const bfd_byte *build_id)
{
- gdb_bfd_ref_ptr abfd;
+ if (separate_debug_file_debug)
+ {
+ printf_unfiltered (_(" Trying %s..."), link.c_str ());
+ gdb_flush (gdb_stdout);
+ }
+
+ /* 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)
+ {
+ if (separate_debug_file_debug)
+ printf_unfiltered (_(" no, unable to compute real path\n"));
+
+ return {};
+ }
+
+ /* We expect to be silent on the non-existing files. */
+ gdb_bfd_ref_ptr debug_bfd = gdb_bfd_open (filename.get (), gnutarget, -1);
+
+ if (debug_bfd == NULL)
+ {
+ if (separate_debug_file_debug)
+ printf_unfiltered (_(" no, unable to open.\n"));
+
+ return {};
+ }
+
+ if (!build_id_verify (debug_bfd.get(), build_id_len, build_id))
+ {
+ if (separate_debug_file_debug)
+ printf_unfiltered (_(" no, build-id does not match.\n"));
+
+ return {};
+ }
+
+ if (separate_debug_file_debug)
+ printf_unfiltered (_(" yes!\n"));
+
+ return debug_bfd;
+}
+
+/* Common code for finding BFDs of a given build-id. This function
+ works with both debuginfo files (SUFFIX == ".debug") and executable
+ files (SUFFIX == ""). */
+static gdb_bfd_ref_ptr
+build_id_to_bfd_suffix (size_t build_id_len, const bfd_byte *build_id,
+ const char *suffix)
+{
/* Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
cause "/.build-id/..." lookups. */
const gdb_byte *data = build_id;
size_t size = build_id_len;
+ /* Compute where the file named after the build-id would be.
+
+ If debugdir is "/usr/lib/debug" and the build-id is abcdef, this will
+ give "/usr/lib/debug/.build-id/ab/cdef.debug". */
std::string link = debugdir.get ();
link += "/.build-id/";
while (size-- > 0)
string_appendf (link, "%02x", (unsigned) *data++);
- link += ".debug";
+ link += suffix;
- if (separate_debug_file_debug)
- {
- printf_unfiltered (_(" Trying %s..."), link.c_str ());
- gdb_flush (gdb_stdout);
- }
+ gdb_bfd_ref_ptr debug_bfd
+ = build_id_to_debug_bfd_1 (link, build_id_len, build_id);
+ if (debug_bfd != NULL)
+ return debug_bfd;
- /* 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 ()));
+ /* Try to look under the sysroot as well. If the sysroot is
+ "/the/sysroot", it will give
+ "/the/sysroot/usr/lib/debug/.build-id/ab/cdef.debug".
- if (filename == NULL)
+ Don't do it if the sysroot is the target system ("target:"). It
+ could work in theory, but the lrealpath in build_id_to_debug_bfd_1
+ only works with local paths. */
+ if (strcmp (gdb_sysroot, TARGET_SYSROOT_PREFIX) != 0)
{
- if (separate_debug_file_debug)
- printf_unfiltered (_(" no, unable to compute real path\n"));
-
- continue;
+ link = gdb_sysroot + link;
+ debug_bfd = build_id_to_debug_bfd_1 (link, build_id_len, build_id);
+ if (debug_bfd != NULL)
+ return debug_bfd;
}
+ }
- /* We expect to be silent on the non-existing files. */
- abfd = gdb_bfd_open (filename.get (), gnutarget, -1);
-
- if (abfd == NULL)
- {
- if (separate_debug_file_debug)
- printf_unfiltered (_(" no, unable to open.\n"));
-
- continue;
- }
+ return {};
+}
- if (build_id_verify (abfd.get(), build_id_len, build_id))
- {
- if (separate_debug_file_debug)
- printf_unfiltered (_(" yes!\n"));
+/* See build-id.h. */
- break;
- }
- else
- {
- if (separate_debug_file_debug)
- printf_unfiltered (_(" no, build-id does not match.\n"));
- }
+gdb_bfd_ref_ptr
+build_id_to_debug_bfd (size_t build_id_len, const bfd_byte *build_id)
+{
+ return build_id_to_bfd_suffix (build_id_len, build_id, ".debug");
+}
- abfd.release ();
- }
+/* See build-id.h. */
- return abfd;
+gdb_bfd_ref_ptr
+build_id_to_exec_bfd (size_t build_id_len, const bfd_byte *build_id)
+{
+ return build_id_to_bfd_suffix (build_id_len, build_id, "");
}
/* See build-id.h. */
projects / deliverable / binutils-gdb.git / blobdiff