Re: [Xenomai-help] pthread exit and PTHREAD_WARNSW

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

Jeff Weber wrote:

Hi Jeff,

any news about the hostrt patch I sent you for x86_32? Does it work?

> From testing, I found that if I enable PTHREAD_WARNSW for a pthread, I must
> explicitly disable this mode before the thread terminates, or the thread
> draws a signal 24 SIGXCPU.

Yes, the problem is that we can put such migration if the thread
function returns, but it will not work in case pthread_exit is called.

> 
> I've tried to simplify my thread terminations by pushing a function which
> calls pthread_set_mode_np(PTHREAD_WARNSW, 0) onto the thread cleanup stack,
> and always terminating the thread via pthread_exit().  However, this method
> still draws a signal 24 SIGXCPU.    Here's a sample backtrace:

... and pthread_exit is basically a Linux service, so, we can not
guarantee that it does not make any syscall before executing the cleanup
handlers.

-- 
					    Gilles.