The problematic debug symbol files triggering the valgrind issue.
root@ee:~# readelf --debug-dump=links
/usr/lib/x86_64-linux-gnu/libgmodule-2.0.so.0.6200.1
Contents of the .gnu_debugaltlink section:
Separate debug info file:
/usr/lib/debug/.dwz/x86_64-linux-gnu/libglib2.0-0.debug
Build-ID (0x14 bytes):
cb 51 16 ac 07 e2 cb 3d 10 5e 39 f1 63 ba b7 b1 45 94 a1 49
Contents of the .gnu_debuglink section:
Separate debug info file: 73a7789b7bf820c8546a35c13938e61fac4de0.debug
CRC value: 0xc19e667a
root@ee:~# readelf --debug-dump=links
/usr/lib/debug/.build-id/0f/73a7789b7bf820c8546a35c13938e61fac4de0.debug
readelf: Warning: Unsupported form (DW_FORM_GNU_strp_alt) for attribute
DW_AT_comp_dir
Contents of the .gnu_debugaltlink section:
Separate debug info file:
/usr/lib/debug/.dwz/x86_64-linux-gnu/libglib2.0-0.debug
Build-ID (0x14 bytes):
cb 51 16 ac 07 e2 cb 3d 10 5e 39 f1 63 ba b7 b1 45 94 a1 49
root@ee:~# readelf --debug-dump=links /usr/lib/debug/.dwz/x86_64-linux-
gnu/libglib2.0-0.debug
.gnu_debuglink should not be present in
73a7789b7bf820c8546a35c13938e61fac4de0.debug.
** Description changed:
+ [Impact]
+
+ * With dwz the .gnu_debuglink section may appear duplicated in the
+ debug file referenced originally in the .gnu_debuglink section. In that
+ case Valgrind fails to load the debug symbols.
+
+ [Test Case]
+
+ * In Ubuntu releases earlier than 19.10 use gio from a package rebuilt with
dwz.
+ * Observe no relevant error when running gio with valgrind:
+ $ valgrind /usr/bin/gio ~
+
+ [Regression Potential]
+
+ * The fix is very simple, just ignoring the second .gnu_debuglink
+ found. There are no likely regressions.
+
+ [Original Bug Text]
+
The debug symbols from libglib2.0-0-dbgsym and libgtk-3-0-dbgsym don't
get properly picked up by valgrind in eoan for some reason. The symbols
correctly work under gdb.
There is an warning printed from valgrind
'debuginfo section duplicates a section in the main ELF file'
Laney tried to rebuild without dh_dwz and it makes the warning go away and
the symbol work.
Downgrading valgrind to the disco version doesn't fix the issue.
** Summary changed:
- valgrind fails to use debug symbols from glib/gtk
+ [SRU] valgrind fails to use debug symbols from glib/gtk
** Also affects: valgrind (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: valgrind (Ubuntu Disco)
Importance: Undecided
Status: New
** Changed in: valgrind (Ubuntu Bionic)
Importance: Undecided => Low
** Changed in: valgrind (Ubuntu Disco)
Importance: Undecided => Low
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https://bugs.launchpad.net/bugs/1848211
Title:
[SRU] valgrind fails to use debug symbols from glib/gtk
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