Re: [Xenomai-help] native skin 2.5.0: rt_task_create() segfaults if stacksize parameter too small

[Stefan Kisdaroczi <kisda@domain.hid>]

[-- Attachment #1: Type: text/plain, Size: 907 bytes --]

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 <= 16911 : Segmentation fault
>> Stacksize >= 16912 : ok
>>
>> Any hints ?
> 
> What does the task do? If it uses printf, printf needs a lot of room on
> the stack.
> 

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


[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 251 bytes --]