Re: unable to debug statically linked program with linux threads

[Eric Desjardins <eric dot desjardins at discreet dot com>]

Hi,

I got this problem too but I use dynamic linking and I run without
LD_ASSUME_KERNEL 2.4.19 env variable set (using NTPL support). 
If you do not use NTPL support, you won't have this problem.

Normally when you get a sig32 signal, your thread is doing something
and is interrupted. For example, suppose your thread is waiting on a
select call and the thread is destroyed, the thread will receive a sig32
signal.

I assume this should not be happening and usually considers that as a
bug. In your case, the sleep command on your thread is interrupted so I
guess this is why you receive this signal.

Have you tried setting a signal handler?

Eric


On Thu, 2005-03-17 at 17:06, Ajay Patel wrote:
> Hi,
>   I have a FC3 based i686 machine with gdb version 6.1.
>   I got a simple threaded program from one BSD. (program attached)
> 
>   With dynamic linking (linux threads), I can run
>   the program under gdb without a problem.
>   All thread related commands seems to work properly.
> 
>   With static linking, when I run this program under
>   gdb, first I get
>        "Program received signal SIG32/SIG33 Real-time event 32/32".
>   I avoid this problem by
>         "handle SIG32/SIG33 pass nostop noprint".
> 
>   However none of the thread related command works.
> 
>   Any suggestion?
> 
> Thanks
> Ajay
> 
> /****************************************************************************
>  *
>  * Simple diff mode test.
>  *
>  * $FreeBSD: src/lib/libpthread/test/hello_d.c,v 1.1 2000/04/24 21:07:37
> jasone Exp $
>  *
>  ****************************************************************************/
> 
> #include <stdio.h>
> #include <string.h>
> #include <pthread.h>
> 
> void *
> entry1(void * a_arg)
> {
>         fprintf(stderr, "Hello world1\n");
> 
>         sleep(100);
> }
> 
> void *
> entry2(void * a_arg)
> {
>         fprintf(stderr, "Hello world2\n");
> 
>         sleep(100);
> }
> int
> main()
> {
>         pthread_t thread1, thread2;
>         int error;
> 
>         error = pthread_create(&thread1, NULL, entry1, NULL);
>         if (error)
>                 fprintf(stderr, "Error in pthread_create(): %s\n",
>                         strerror(error));
> 
>         error = pthread_create(&thread2, NULL, entry2, NULL);
>         if (error)
>                 fprintf(stderr, "Error in pthread_create(): %s\n",
>                         strerror(error));
> 
>         error = pthread_join(thread1, NULL);
>         if (error)
>                 fprintf(stderr, "Error in pthread_join(): %s\n",
>                         strerror(error));
>         error = pthread_join(thread2, NULL);
>         if (error)
>                 fprintf(stderr, "Error in pthread_join(): %s\n",
>                         strerror(error));
> 
>         return 0;
> }