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Make elf loader search for debug links in .debug dirs

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When the distribution is built using yocto project, it's possible
to specify 'dbg-pkgs' image feature, see:
https://docs.yoctoproject.org/dev/ref-manual/features.html
This image feature makes files with package debug symbols being
placed under .debug directories accompanying the original binary
directories and mentioned in the .gnu_debuglink of the original binary.
Effectively the symbols of e.g. /x/y/libz.so will be placed in
/x/y/.debug/libz.so.

This change makes sysprof's elf loader to search for debug links
in such a .debug directories.
This commit is contained in:
Pawel Lampe
2025-05-16 14:46:29 +02:00
parent 77582ec84e
commit 975a8d1a9e
1 changed files with 7 additions and 0 deletions
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7
src/libsysprof/sysprof-elf-loader.c
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@ -336,6 +336,7 @@ sysprof_elf_loader_annotate (SysprofElfLoader *self,
g_autofree char *directory_name = NULL; g_autofree char *directory_name = NULL;
g_autofree char *debug_path = NULL; g_autofree char *debug_path = NULL;
g_autofree char *short_debug_path = NULL; g_autofree char *short_debug_path = NULL;
g_autofree char *shorter_debug_path = NULL;
const char *short_directory_name; const char *short_directory_name;
const char *debug_dir = self->debug_dirs[i]; const char *debug_dir = self->debug_dirs[i];
const char *build_id; const char *build_id;
@ -360,6 +361,12 @@ sysprof_elf_loader_annotate (SysprofElfLoader *self,
sysprof_elf_set_debug_link_elf (elf, get_deepest_debuglink (debug_link_elf)); sysprof_elf_set_debug_link_elf (elf, get_deepest_debuglink (debug_link_elf));
return; return;
} }
shorter_debug_path = g_build_filename (directory_name, ".debug", debug_link, NULL);
if ((debug_link_elf = sysprof_elf_loader_load (self, mount_namespace, shorter_debug_path, build_id, 0, NULL)))
{
sysprof_elf_set_debug_link_elf (elf, get_deepest_debuglink (debug_link_elf));
return;
}
} }
} }