frame unwinding patches

Jan Kratochvil jan.kratochvil@redhat.com
Mon Apr 3 21:23:00 GMT 2017


On Mon, 03 Apr 2017 11:00:03 +0200, Milian Wolff wrote:
> I just got a report from a colleague. As-is, elfutils would fail to unwind 
> from the following location in his application:
> 
> 0x1137ca4
> 
> With the x86_64 patch applied, he got a proper backtrace:

S/he has something wrong with the compiler.  With -fasynchronous-unwind-tables
frame pointer unwinding is never needed
and gcc defaults to -fasynchronous-unwind-tables on x86_64.

This is why I haven't implemented it originally as it only paper overs the
real problem and it leads to unreliable backtraces in longterm.


Jan



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