gdb/testsuite/gdb.threads/async.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2019-2020 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 #include <stdio.h>
  19 #include <unistd.h>
  20 #include <stdlib.h>
  21 #include <pthread.h>
  22
  23 #define NUM 2
  24
  25 static pthread_barrier_t threads_started_barrier;
  26
  27 static void *
  28 thread_function (void *arg)
  29 {
  30   pthread_barrier_wait (&threads_started_barrier);
  31
  32   while (1)
  33     {
  34       /* Sleep a bit to give the other threads a chance to run.  */
  35       usleep (1); /* set breakpoint here */
  36     }
  37
  38   pthread_exit (NULL);
  39 }
  40
  41 static void
  42 all_started (void)
  43 {
  44 }
  45
  46 int
  47 main ()
  48 {
  49   pthread_t threads[NUM];
  50   long i;
  51
  52   pthread_barrier_init (&threads_started_barrier, NULL, NUM + 1);
  53
  54   for (i = 1; i <= NUM; i++)
  55     {
  56       int res;
  57
  58       res = pthread_create (&threads[i - 1],
  59                             NULL,
  60                             thread_function, NULL);
  61     }
  62
  63   pthread_barrier_wait (&threads_started_barrier);
  64
  65   all_started ();
  66
  67   sleep (180);
  68
  69   exit (EXIT_SUCCESS);
  70 }