ppc: GDB terminates with signal SIGTRAP

["Ajay Patel" <ajayp@kymasys.com>]

[-- Attachment #1: Type: text/plain, Size: 712 bytes --]

Hi,

I have a simple threaded program. (Program attached)
The program is compiled with STATIC linking.

When I setup a breakpoint in newly created thread
(setup breakpoint at run_thread1) and run this program
it terminates with 
"Program terminated with signal SIGTRAP, Trace/breakpoint trap." error.

I have tried this with gdb 6.3 (gdb_6.3-6 patch)
and gdb(6.3.0.0-1.21rh).

I have compiled the program with glibc 2.3.4 & gcc 3.4.3.
I have also compiled the program with glibc 2.3.5 and gcc 4.0.
(Kernel version 2.6.11)

But gdb always terminates.

If I compile the program with dynamic linking it does
not have any problem. 

Any help/Suggestion to debug this problem?

Thanks in advance for the help.

Ajay


[-- Attachment #2: pthread_test.c --]
[-- Type: application/octet-stream, Size: 1825 bytes --]

/* $OpenBSD: pthread_kill.c,v 1.4 2003/07/31 21:48:05 deraadt Exp $ */
/* PUBLIC DOMAIN Oct 2002 <marc@snafu.org> */

/*
 * Verify that pthread_kill does the right thing, i.e. the signal
 * is delivered to the correct thread and proper signal processing
 * is performed.
 */

#include <signal.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <pthread.h>
#include <stdio.h>
#include <sys/fcntl.h>
#include <sys/types.h>
#include <sys/time.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <string.h>


static void
act_handler (int signal, siginfo_t * siginfo, void *context)
{
    struct sigaction sa;
    char *str;

    sigaction (SIGUSR1, NULL, &sa);
    if (sa.sa_handler != SIG_DFL)
	abort ();
    if (siginfo == NULL)
	abort ();
    asprintf (&str, "act_handler: signal %d, siginfo %p, context %p\n",
	      signal, siginfo, context);
    write (STDOUT_FILENO, str, (size_t)strlen(str));
    free (str);
}

static void *
run_thread1 (void *arg)
{
    printf ("Starting THREAD1\n");
    while (1) {
	sleep(4);
    	printf ("THREAD1 is going back to sleep\n");
    }
}


static void *
run_thread2 (void *arg)
{
    printf ("Starting THREAD2\n");
    while (1) {
	sleep(4);
    	printf ("THREAD2 is going back to sleep\n");
    }
}

int
main (int argc, char **argv)
{
    int i;
    pthread_t thread1;
    pthread_t thread2;
    struct sigaction act;

    act.sa_sigaction = act_handler;
    sigemptyset (&act.sa_mask);
    act.sa_flags = SA_SIGINFO | SA_RESETHAND | SA_NODEFER;
    sigaction (SIGUSR1, &act, NULL);
    pthread_create (&thread1, NULL, run_thread1, NULL);
    pthread_create (&thread2, NULL, run_thread2, NULL);
    sleep (1);

    while (1) {
	sleep(4);
    	printf ("Main thread is going back to sleep\n");
    }
}