Re: [Xenomai-help] Debugging

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

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Stephan Zimmermann wrote:
 > Hello List,
 > I am facing some trouble debugging my Xenomai application. When I set a 
 > breakpoint in my main() task, everything works fine. If I set a breakpoint in 
 > another task, the debugger won't stop the application. Is this a known 
 > problem, or am I doing something wrong (compiler/debugger options)? I tryed 
 > it within Eclipse and gdb commandline interface, both gave me the same 
 > results. Can someone give me a Hint?

I tested putting a breakpoint on the function "thread_routine" of the
attached program, and it works. Could you send us a minimal program
where this does not work ? 

Another detail: in order to correctly debug threaded programs, gdb needs
the libthread_db library, do you see the following line when starting
gdb:
Using host libthread_db library "/lib/libthread_db.so.1".

 > 
 > My System:
 > Debian 3.1 on AMD X2, running in 32bit mode
 > Xenomai 2.2 on Kernel 2.6.17.6, with no other patches
 > debian standard gcc 3.3.5
 > (same problem on intel notebook)
 > The program I'm working on is written in C++, wrapping classes around the 
 > native skin.

You may be reinventing the wheel, there is a xenomm projects which
provides a C++ interface to the native skin, see:
https://gna.org/projects/xenomm

-- 


					    Gilles Chanteperdrix.

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#include <pthread.h>
#include <semaphore.h>

void *thread_routine(void *cookie)
{
	sem_t *sem = (sem_t *) cookie;
	sem_wait(sem);
	return NULL;
}

int main(int argc, const char *argv[])
{
	pthread_t thread;
	sem_t sem;

	sem_init(&sem, 0, 0);
	pthread_create(&thread, NULL, &thread_routine, &sem);
	sem_post(&sem);

	pthread_join(thread, NULL);
	
	return 0;
}