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| author | Simon Marchi <simon.marchi@ericsson.com> | 2017-06-11 23:16:01 +0200 |
|---|---|---|
| committer | Simon Marchi <simon.marchi@ericsson.com> | 2017-06-11 23:16:28 +0200 |
| commit | c4dcb155c446cee135101d72172b47e3fc99caf9 (patch) | |
| tree | 5e69677386d293f20ddebb33b6dafb327f554588 /gdb/symfile.h | |
| parent | 9b97dfbf8049bed3b2f79c6c785afaf18206dad3 (diff) | |
| download | gdb-c4dcb155c446cee135101d72172b47e3fc99caf9.zip gdb-c4dcb155c446cee135101d72172b47e3fc99caf9.tar.gz gdb-c4dcb155c446cee135101d72172b47e3fc99caf9.tar.bz2 | |
Introduce "set debug separate-debug-file"
I helped someone figure out why their separate debug info (debug
link-based) was not found by gdb. It turns out that the debug file was
not named properly. It made me realize that it is quite difficult to
diagnose this kind of problems. This patch adds some debug output to
show where GDB looks for those files, so that it should be (more)
obvious to find what's wrong.
Here's an example of the result, first with an example of unsuccessful lookup,
and then a successful one.
(gdb) set debug separate-debug-file on
(gdb) file /usr/bin/gnome-calculator
Reading symbols from /usr/bin/gnome-calculator...
Looking for separate debug info (build-id) for /usr/bin/gnome-calculator
Trying /usr/local/lib/debug/.build-id/0d/5c5e8c86dbe4f4f95f7a13de04f91d377f3c6a.debug
Looking for separate debug info (debug link) for /usr/bin/gnome-calculator
Trying /usr/bin/5c5e8c86dbe4f4f95f7a13de04f91d377f3c6a.debug
Trying /usr/bin/.debug/5c5e8c86dbe4f4f95f7a13de04f91d377f3c6a.debug
Trying /usr/local/lib/debug//usr/bin/5c5e8c86dbe4f4f95f7a13de04f91d377f3c6a.debug
(no debugging symbols found)...done.
(gdb) set debug-file-directory /usr/lib/debug
(gdb) file /usr/bin/gnome-calculator
Reading symbols from /usr/bin/gnome-calculator...
Looking for separate debug info by build-id for /usr/bin/gnome-calculator
Trying /usr/lib/debug/.build-id/0d/5c5e8c86dbe4f4f95f7a13de04f91d377f3c6a.debug
Reading symbols from /usr/lib/debug/.build-id/0d/5c5e8c86dbe4f4f95f7a13de04f91d377f3c6a.debug...done.
done.
Note: here, the debug link happens to be named like the build-id, but it
doesn't have to be this way. It puzzled me for a minute.
gdb/ChangeLog:
* NEWS (Changes since GDB 8.0): Announce {set,show} debug
separate-debug-file commands.
* symfile.h (separate_debug_file_debug): New global.
* symfile.c (separate_debug_file_debug): New global.
(separate_debug_file_exists, find_separate_debug_file): Add
debug output.
(_initialize_symfile): Add "set debug separate-debug-file"
command.
* build-id.c (build_id_to_debug_bfd,
find_separate_debug_file_by_buildid): Add debug output.
gdb/doc/ChangeLog:
* gdb.texinfo (Optional Messages about Internal Happenings):
Document {set,show} debug separate-debug-file commands.
Diffstat (limited to 'gdb/symfile.h')
| -rw-r--r-- | gdb/symfile.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gdb/symfile.h b/gdb/symfile.h index ab536e8..bb47fdf 100644 --- a/gdb/symfile.h +++ b/gdb/symfile.h @@ -646,4 +646,8 @@ extern void elfmdebug_build_psymtabs (struct objfile *, extern gdb_bfd_ref_ptr find_separate_debug_file_in_section (struct objfile *); +/* True if we are printing debug output about separate debug info files. */ + +extern int separate_debug_file_debug; + #endif /* !defined(SYMFILE_H) */ |