Re: Debugging a Multi-threaded application on PowerPC 82xx...

["Gautham Thavva" <gautham.thavva@lycos.com>]

Hi Daniel,

I have read in the archives that you are yet to write a FAQ and already answered this question 5 or 6 times. Please bear with me
for one more time.

A quick recap: I am running a multi-threaded application on
PowerPC 8260 and trying to debug it with gdb-5.3 

In the previous reply, you had asked me to set the solib-absolute-
prefix. I set solib-absolute-prefix and still couldn't debug.
I then built the application as a static executable and tried
to debug it. It got stuck at the system calls in the application.

I then tested the system calls with a test program.
---------------------------------------------
#include <pthread.h>
#include <stdio.h>
#define NUM_THREADS     5


void *PrintHello(void *threadid)
{
<##3##>   printf("\n%d: Hello World!\n", threadid);
   pthread_exit(NULL);
}

int main (int argc, char *argv[])
{
   pthread_t threads[NUM_THREADS];
int rc, t;

<##1##>   system("mkdir story");
   system("rm -rf story");

   for(t=0;t < NUM_THREADS;t++){
<##2##>      printf("Creating thread %d\n", t);
      rc = pthread_create(&threads[t], NULL, PrintHello, (void *)t);
if (rc){
         printf("ERROR; return code from pthread_create() is %d\n", rc);
         exit(-1);
      }
   }
   pthread_exit(NULL);
-------------------------------------------------------------------

I put a breakpoint at points shown by <##X##> in the above code.
It hit breakpoint 2 and 3 but never hit breakpoint 1
I placed the system calls in the main function to exclude
the possibility of gdb not handling system calls in threads.

Please can you tell me how I can resolve this issue. 
I appreciate your help.

with regards,
Gautham Thavva



On Mon, 24 Mar 2003 15:43:57  
 Daniel Jacobowitz wrote:
>How does DDD invoke GDB?  I bet it uses --symbols or the symbol-file
>command.  Don't Do That!  Use "file" or just "gdb gtest" instead.
>Fix DDD or say "file gtest" before saying "target remote".
>
>You also need to have your target libraries present on the host system
>and pointed to by solib-absolute-prefix or solib-search-path.
>
>And I (or someone else!) should write more bulletproof documentation
>about this since it is obviously a FAQ.
>



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