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Date: Thu, 11 Aug 2011 22:09:54 +0200
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
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Subject: Re: [Xenomai-core] gcc-4.6 issue
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To: Daniele Nicolodi <daniele@domain.hid>
Cc: xenomai@xenomai.org

On 08/11/2011 08:42 PM, Daniele Nicolodi wrote:
> On 11/08/11 19:22, Gilles Chanteperdrix wrote:
> 
>> Please try and find the point in the latency test where the hang happens
>> (it probably happens when calling a xenomai service, so, not
>> sched_setscheduler), and then post the two disassemblies of this service
>> implementation in libnative.so, the one compiled with 4.4, the other
>> with 4.6.
> 
> The latency test hangs in rt_task_create() attached the function
> disassemblies obtained with gcc-4.4 and gcc-4.6. Hope that this helps,
> those are Aramaic to me.

The gcc 4.6 version is compiled with frame pointer disabled, whereas the
4.4 version is compiled with frame pointers. Enabling the
-fomit-frame-pointer option with gcc 4.4 seems to cause issues as well.

Could you test passing -fno-omit-frame-pointers in the CFLAGS with gcc
4.6 to see if it avoids the issue?

Regards.

-- 
                                                                Gilles.