[PATCH] for ex9 test case failure

[Steven Munroe]

There a bug in ex9 that on SMP systems can result in two threads calling exit().

The net is that ex9 will segfault in "exit()" attempting to dereference "__exit_funcs". 

diff -rc2P glibc-2.2.5/ChangeLog glibc-2.2.5-pthreads/ChangeLog
*** glibc-2.2.5/ChangeLog	Sun Jan 20 21:20:18 2002
--- glibc-2.2.5-pthreads/ChangeLog	Fri Apr 26 14:58:58 2002
***************
*** 1,2 ****
--- 1,8 ----
+ 2002-04-26  Steven Munroe  <sjmunroe@us.ibm.com>
+ 
+ 	* linuxthreads/Examples/ex9.c
+ 	ex9 thread function is not thread safe and can call exit() from
+ 	two or more threads.
+ 
  2002-01-18  Andreas Schwab  <schwab@suse.de>
  

diff -rc2P glibc-2.2.5/linuxthreads/Examples/ex9.c glibc-2.2.5-pthreads/linuxthreads/Examples/ex9.c
*** glibc-2.2.5/linuxthreads/Examples/ex9.c	Tue Jun 20 23:32:01 2000
--- glibc-2.2.5-pthreads/linuxthreads/Examples/ex9.c	Fri Apr 26 14:55:51 2002
***************
*** 33,37 ****
  main (void)
  {
!   pthread_t th;
    int i;
  
--- 33,38 ----
  main (void)
  {
!   pthread_t th; 
!   pthread_t thread_list[NUM_THREADS]; 
    int i;
  
***************
*** 41,50 ****
    for (i = 0; i < NUM_THREADS; i++)
      {
!       if (pthread_create (&th, NULL, thread, NULL) != 0)
  	error (EXIT_FAILURE, 0, "cannot create thread");
      }
  
    (void) thread (NULL);
!   /* notreached */
    return 0;
  }
--- 42,56 ----
    for (i = 0; i < NUM_THREADS; i++)
      {
!       if (pthread_create (&thread_list[i], NULL, thread, NULL) != 0)
  	error (EXIT_FAILURE, 0, "cannot create thread");
      }
  
    (void) thread (NULL);
! 
!   for (i = 0; i < NUM_THREADS; i++)
!     {
!       pthread_join(thread_list[i], NULL);
!     }
! 
    return 0;
  }
***************
*** 88,92 ****
  	    ++linecount, (unsigned long) self);
      funlockfile (stdout);
!     exit (0);
    }
  
--- 94,100 ----
  	    ++linecount, (unsigned long) self);
      funlockfile (stdout);
!     return;
! 
! /*    exit (0); */
    }