Re: [Xenomai-help] rt_task_join() call hangs in shared lib destructor

[Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>]

Mauro Salvini wrote:
> 
>> It looks like a typical pthread_join deadlock. The thread you are 
>> joining is locked on a pthread mutex, that some other thread (I
>> would say, the one calling pthread_join) has. It can not work. You
>> should not call pthread_join while holding a mutex.
> 
> Yes, it looks like this, but I don't use any mutex in my task. It
> looks like dlclose() locks a mutex used also by pthread_join() (that
> was called into shared object destructor), and here is deadlock. But
> executing realtime task as normal thread does not raise this issue.

The trace you sent clearly shows that the problem happens because
rt_task_trampoline calls pthread_exit. In your tests with
rt_task_shadow/pthread_create, did you try to use pthread_exit? Or could
you try replacing the call to pthread_exit in rt_task_trampoline with a
return?


-- 
                                                                Gilles.