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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/doc | |
| 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/doc')
| -rw-r--r-- | gdb/doc/ChangeLog | 5 | ||||
| -rw-r--r-- | gdb/doc/gdb.texinfo | 6 |
2 files changed, 11 insertions, 0 deletions
diff --git a/gdb/doc/ChangeLog b/gdb/doc/ChangeLog index 868cde9..aa4a9ce 100644 --- a/gdb/doc/ChangeLog +++ b/gdb/doc/ChangeLog @@ -1,3 +1,8 @@ +2017-06-11 Simon Marchi <simon.marchi@ericsson.com> + + * gdb.texinfo (Optional Messages about Internal Happenings): + Document {set,show} debug separate-debug-file commands. + 2017-06-07 Sergio Durigan Junior <sergiodj@redhat.com> * gdb.texinfo (Starting) <startup-with-shell>: Add @anchor. diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo index 8d7a1c9..c167a86 100644 --- a/gdb/doc/gdb.texinfo +++ b/gdb/doc/gdb.texinfo @@ -23984,6 +23984,12 @@ the serial line to the remote machine. The info is printed on the @value{GDBN} standard output stream. The default is off. @item show debug remote Displays the state of display of remote packets. + +@item set debug separate-debug-file +Turns on or off display of debug output about separate debug file search. +@item show debug separate-debug-file +Displays the state of separate debug file search debug output. + @item set debug serial Turns on or off display of @value{GDBN} serial debugging info. The default is off. |