Re: [Xenomai-help] RTDM task blocks when connecting gdb to realtime task

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

Herrera-Bendezu, Luis wrote:
> I am using Xenomai 2.4.10 on PPC. An RTDM driver creates an RTDM task
> using rtdm_task_init() and goes to sleep periodically via function
> rtdm_task_sleep().
> 
> When driver is loaded, RTDM task executes as expected. Then a realtime
> application is started via gdbserver on target board and on a linux host
> a gdb client is connected to that board. As soon as gdb breakpoints the
> realtime application the RTDM task never returns from rtdm_task_sleep().
> The application does not open the RTMD driver so at this point there is
> no interaction with the driver.
> (...)
> 
> Any ideas on the cause of the problem and fix?

That is a feature actually, in order to help you debug your application,
 all timers in the system are stopped. So, the rtdm task will only
return from rtdm_task_sleep when you will type "continue" in gdb.

The timer which have the XNTIMER_NOBLCK bit are not stopped, but setting
this bit cleanly will need extensions of the RTDM driver API.

-- 
					    Gilles.