gdb/testsuite/gdb.threads/no-unwaited-for-left.c

   1 /* Copyright 2007-2015 Free Software Foundation, Inc.
   2
   3    This program is free software; you can redistribute it and/or modify
   4    it under the terms of the GNU General Public License as published by
   5    the Free Software Foundation; either version 3 of the License, or
   6    (at your option) any later version.
   7
   8    This program is distributed in the hope that it will be useful,
   9    but WITHOUT ANY WARRANTY; without even the implied warranty of
  10    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11    GNU General Public License for more details.
  12
  13    You should have received a copy of the GNU General Public License
  14    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  15
  16 #include <pthread.h>
  17 #include <assert.h>
  18 #include <unistd.h>
  19
  20 static volatile pthread_t main_thread;
  21 pthread_barrier_t barrier;
  22
  23 static void *
  24 thread_a (void *arg)
  25 {
  26   int i;
  27
  28   return 0; /* break-here */
  29 }
  30
  31 static void *
  32 thread_b (void *arg)
  33 {
  34   int i;
  35
  36   pthread_barrier_wait (&barrier);
  37
  38   i = pthread_join (main_thread, NULL);
  39   assert (i == 0);
  40
  41   return arg;
  42 }
  43
  44 int
  45 main (void)
  46 {
  47   pthread_t thread;
  48   int i;
  49
  50   /* First test resuming only `thread_a', which exits.  */
  51   i = pthread_create (&thread, NULL, thread_a, NULL);
  52   assert (i == 0);
  53   pthread_join (thread, NULL);
  54
  55   /* Then test resuming only the leader, which also exits.  */
  56   main_thread = pthread_self ();
  57
  58   pthread_barrier_init (&barrier, NULL, 2);
  59
  60   i = pthread_create (&thread, NULL, thread_b, NULL);
  61   assert (i == 0);
  62
  63   pthread_barrier_wait (&barrier);
  64
  65   pthread_exit (NULL); /* break-here-2 */
  66   /* NOTREACHED */
  67   return 0;
  68 }