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From: Philippe Gerum <rpm@xenomai.org>
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Date: Wed, 22 Dec 2010 15:20:17 +0100
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Subject: Re: [Xenomai-help] gdb/gdbserver hangs during rt_task_create
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To: Kolja Waschk <xenoka09@domain.hid>
Cc: Xenomai GNA <xenomai@xenomai.org>

On Wed, 2010-12-22 at 15:17 +0100, Philippe Gerum wrote:
> On Wed, 2010-12-22 at 15:14 +0100, Kolja Waschk wrote:
> > > Your Makefile may have an issue. Do you happen to link with
> > > libpthread_rt.so in addition to libnative.so?
> > 
> > Yes, because most of the code uses the native API, but one part uses pthread_* calls.. ?
> > 
> 
> Ok, you should have a look at this commit then, and introduce
> wrap-link.sh in the link rules for your app: 
> http://git.xenomai.org/?p=xenomai-gch.git;a=commit;h=8f5330c9da75f5fdedee5b7cf60e525ee5845300
> 

In short, it is Xenomai's pthread_cond_wait() version which returns
EPERM to the linuxthread manager, because it does not want to be called
from a non-Xenomai thread. Obviously, the manager thread should not
invoke any Xenomai service in the first place, and this is where the
link magic bites.

> 
> > Kolja
> > 
> 

-- 
Philippe.