gdb/testsuite/gdb.btrace/multi-thread-step.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2013-2017 Free Software Foundation, Inc.
   4
   5    Contributed by Intel Corp. <markus.t.metzger@intel.com>
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include <pthread.h>
  21
  22 static pthread_barrier_t barrier;
  23 static int global;
  24
  25 static void *
  26 test (void *arg)
  27 {
  28   pthread_barrier_wait (&barrier);
  29
  30   global = 42; /* bp.1 */
  31
  32   pthread_barrier_wait (&barrier);
  33
  34   global = 42; /* bp.2 */
  35
  36   return arg;
  37 }
  38
  39 int
  40 main (void)
  41 {
  42   pthread_t th;
  43
  44   pthread_barrier_init (&barrier, NULL, 2);
  45   pthread_create (&th, NULL, test, NULL);
  46
  47   test (NULL);
  48
  49   pthread_join (th, NULL);
  50   pthread_barrier_destroy (&barrier);
  51
  52   return 0; /* bp.3 */
  53 }