1/* This testcase is part of GDB, the GNU debugger.
2
3   Copyright 2002-2020 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   This file is based on schedlock.c.  */
19
20#include <stdio.h>
21#include <unistd.h>
22#include <stdlib.h>
23#include <pthread.h>
24
25int THREADS = 10;
26unsigned int *args;
27volatile int done = 0;
28
29void *
30thread_function (void *arg)
31{
32  int my_number = (long) arg;
33  volatile int *myp = (volatile int *) &args[my_number];
34
35  /* Don't run forever.  Run just short of it :)  */
36  while (*myp > 0 && !done)
37    {
38      (*myp)++; /* set breakpoint here */
39    }
40
41  if (done)
42    usleep (100); /* Some time to make sure we don't mask any bad
43		     SIGTRAP handling.  */
44
45  pthread_exit (NULL);
46}
47
48int
49main (int argc, char **argv)
50{
51  int res;
52  pthread_t *threads;
53  void *thread_result;
54  long i = 0;
55
56  threads = malloc (THREADS * sizeof (pthread_t));
57  args = malloc (THREADS * sizeof (unsigned int));
58
59  for (i = 0; i < THREADS; i++)
60    {
61      args[i] = 1; /* Init value.  */
62      res = pthread_create (&threads[i],
63			    NULL,
64			    thread_function,
65			    (void *) i);
66    }
67
68  for (i = 0; i < THREADS; i++)
69    pthread_join (threads[i], &thread_result);
70
71  exit(EXIT_SUCCESS);
72}
73