From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Thu, 07 Jan 2010 16:48:37 +0100
From: Stefan Kisdaroczi <kisda@domain.hid>
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Subject: Re: [Xenomai-help] native skin 2.5.0: rt_task_create() segfaults if
 stacksize parameter too small
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To: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
Cc: xenomai@xenomai.org

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Am 07.01.2010 15:36, schrieb Gilles Chanteperdrix:
> Stefan Kisdaroczi wrote:
>> hi,
>>
>> i have upgraded xenomai to 2.5.0 (x86,32bit). My application segfaults=
 when I
>> try to create a task with stacksize 2048, this worked with 2.4.10.
>> Because my app is written in pascal i have reproduced the problem with=
 the
>> xenomai trivial-periodic.c example:
>>
>> -	rt_task_create(&demo_task, "trivial", 0, 99, 0);
>> +	rt_task_create(&demo_task, "trivial",16911, 99, 0);
>>
>> Stacksize 0 -> default stack size : ok
>> Stacksize > 0 and <=3D 16911 : Segmentation fault
>> Stacksize >=3D 16912 : ok
>>
>> Any hints ?
>=20
> What does the task do? If it uses printf, printf needs a lot of room on=

> the stack.
>=20

To clarify:
It does not depend on the task body, the task is not even started.
The segfault happens when calling rt_task_create(), before rt_task_start(=
)
is called.

kisda


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