Red Hat Bugzilla – Bug 453506
debugedit fails under x86_64 with -gstabs+
Last modified: 2011-07-19 05:26:18 EDT
When packaging x86_64 binaries that have been compiled with "gcc -gstabs+",
find-debuginfo.sh, which calls debugedit, constantly dies while trying to strip
useful debug information:
extracting debug info from
Failed to update file: invalid section entry size
This happens on my whole final build tree during the find-debuginfo section. I
was able to trace it back specifically to the debugedit binary that is used.
i386 seems to work fine, but if debugedit is to pass successfully in x86_64,
this flag needs to be taken out. After discussions with upstream, the devs (in
this case Mozilla) were not concerned with how they binaries were compiled, but
how debugedit operates, hence why I'm opening up this bug against it.
If a binary, or more detailed compile info is required, I can provide it.
See also https://bugzilla.novell.com/492390
The problem also happens with http://git.spaceboyz.net/asa.git/snapshot/asa_0.3.2.tar.bz2
If amd64/commit.asm is used (with yasm) debugedit fails with the "invalid section entry size" message, but if instead the C code is used there is no problem.
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This bug blocks firefox/thunderbird to submit crash reports directly to mozilla (instead of out bugzilla).
"Perhaps" has something to do with this...
/* TODO: Handle stabs */
if (strcmp (name, ".stab") == 0)
edit_stabs (dso, i);
Somehow I doubt the generated debuginfo on ix86 is correct either even if it doesn't error out.
Roland, thoughts / comments?
We don't support -gstabs at all. Various other tools won't support it either. Packages must be built with DWARF.
Who is "we"? Mozilla builds its Firefox linux builds with -gstabs, it's needed for their crash reporter/database.
Fedora does not support non-DWARF debuginfo such as stabs.
Fedora package builds do not use it.
So ... until somebody volunteers to write stabs support for debugedit, it seems best to make .stab section presence a hard error instead of failing with a cryptic message on some architectures and silently producing garbage debuginfo on others.
That seems reasonable to me.
rpm >= 4.9.1 now in rawhide aborts the build if stabs is used (and debuginfo generation is enabled and in strict mode, as is the default in Fedora), eg:
extracting debug info from /home/pmatilai/rpmbuild/BUILDROOT/rpm-4.9.90-0.git11184.1.fc15.x86_64/bin/rpm
Stabs debuginfo not supported: /home/pmatilai/rpmbuild/BUILDROOT/rpm-4.9.90-0.git11184.1.fc15.x86_64/bin/rpm
error: Bad exit status from /var/tmp/rpm-tmp.wJalYj (%install)