thread and signals

[Nicolas Vignal]

Hi

I join a sample program who create 2 threads.
The child thread send a SIGSTOP to the father thread.

If I run this program many times, I can see 3 behaviour.
- run great
- freeze before the first child message
- freeze before the second child message

I use glibc-2.1.3 on RedHat 6.2
I didn't see any report about this kind of problem. May be there is a bug in 
my sample.

All advices are welcome.

Regards

        Nicolas


#include <stdio.h>
#include <pthread.h>
#include <signal.h>


int function2(pthread_t fatherID)
{

  printf("\n my father is %d \n\n",fatherID);
  pthread_kill(fatherID, SIGSTOP);

  printf("I am the child\n");
  while(1);

}

int function1(void)
{
  pthread_t threadID2=-1;
  pthread_create(&threadID2, NULL, function2, (void *)pthread_self());

  while(1)
  {
    printf("I am the father \n");
  }

}

int main(int argc, char *argv[])
{

  pthread_t threadID1=-1;

  pthread_create(&threadID1, NULL, function1, NULL);

  while(1);

  return 0;
}