Re: [Xenomai-help] Stack sizes etc. (Re: POSIX skin/Blackfin: SIGSEGV when stracing or gdb'ing)

[Philippe Gerum <rpm@xenomai.org>]

On Wed, 2009-07-29 at 13:40 +0200, Kolja Waschk wrote:
> Hi,
> 
> > One of the problems appears when the following code is run via
> > gdbserver, a breakpoint is hit at main() and I "step" over
> > rt_task_shadow:
> >
> >> Xenomai: fatal: xnshadow_relax() failed for thread maintask[222]

This may be an I-pipe issue. As I understand, you are currently running
2009R1-RC2 unmodified, could you summarize where the various Xenomai
related components come from so I could try looking at the issue?

e.g. I-pipe/Adeos patch from uclinux-dist's bfin_patch/adeos_patches/ ?
     Xenomai 2.4.7 support from xenomai.org?

There are two different sources for the I-pipe support for Blackfin, so
it is important to know which one comes into play here.

> 
> I just observed the same without gdb in play, with main extended a bit,
> creating a second (RT) thread from main (after rt_task_shadow in main).
> 
> Xenomai: fatal: xnshadow_relax() failed for thread logger[219]
>   CPU  PID    PRI      TIMEOUT  STAT      NAME
>     0  0       50      0        00400088  ROOT
>     0  217     50      0        00300380  maintask
> >  0  219     50      0        00300380  logger
> Master time base: clock=74044591006
> 
> However, it doesn't happen with the simple example I posted last week.
> Maybe I can find some evolutional stage between that example and my
> larger application that just causes the failure.
> 
> Kolja
-- 
Philippe.