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Re: [Libunwind-devel] Testing time
From: |
Lassi Tuura |
Subject: |
Re: [Libunwind-devel] Testing time |
Date: |
Mon, 4 Apr 2011 10:34:46 +0200 |
Hey,
> I have some reports of crashes on RHEL6 + GCC 4.6 + gold linker. LTO may be
> involved, I am not sure.
So far this looks like an issue in using gcc/gold/lto. Some more info at:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48384
http://sourceware.org/bugzilla/show_bug.cgi?id=12629
Unfortunately the real details aren't on those reports, but the problem is that
unwind info FDE address ranges are inside .eh_frame, not in .text. Otherwise it
looks to correctly describe functions, so it seems somehow unwind info is
generated with a wrong base address. We don't yet know what causes this, but it
doesn't look like libunwind issue. For all we know we could have even built the
tool chain incorrectly.
Regards,
Lassi