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Re: [commit] [tests patchv2] FYI unwinder: tests/ update

From: Jan Kratochvil <jan dot kratochvil at redhat dot com>
To: elfutils-devel at lists dot fedorahosted dot org
Date: Thu, 05 Dec 2013 16:19:02 +0100
Subject: Re: [commit] [tests patchv2] FYI unwinder: tests/ update

Hi Mark,

jankratochvil/testsO2

On Thu, 05 Dec 2013 11:26:13 +0100, Mark Wielaard wrote:
> The backtrace generated is:
> 
> TID 31941:
> #0  0x00007fd3a47975db raise
                         sigusr2 is missing here
> #1  0x00007fd3a4bc7dec stdarg
> #2  0x00007fd3a4bc7e70 backtracegen
> #3  0x00007fd3a4bc7e79 start
> #4  0x00007fd3a478f9d1 start_thread
> #5  0x00007fd3a44dcb6d __clone

it is because of -O2 in build CFLAGS and tail call optimization:

Dump of assembler code for function sigusr2:
[...]
   0x00007f1fc53bdd43 <+19>:	mov    $0x6,%edi
   0x00007f1fc53bdd48 <+24>:	add    $0x8,%rsp
   0x00007f1fc53bdd4c <+28>:	jmpq   0x7f1fc53bd960 <raise(a)plt>

OK for check-in?


Thanks,
Jan

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