1/* This testcase is part of GDB, the GNU debugger.
2
3   Copyright 2016-2023 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*/
19
20#include <pthread.h>
21#include <unistd.h>
22
23#define NUM_THREADS 2
24
25static pthread_barrier_t barrier;
26
27static void
28child_sub_function (void)
29{
30  volatile int dummy = 0;
31  while (1)
32    /* Dummy loop body to allow setting breakpoint.  */
33    dummy = !dummy; /* thread loop line */
34}
35
36static void *
37child_function (void *args)
38{
39  pthread_barrier_wait (&barrier);
40
41  child_sub_function (); /* thread caller line */
42
43  return NULL;
44}
45
46int
47main (void)
48{
49  int i = 0;
50  pthread_t threads[NUM_THREADS];
51
52  /* Make the test exit eventually.  */
53  alarm (20);
54
55  /* Initialize the barrier, NUM_THREADS plus the main thread.  */
56  pthread_barrier_init (&barrier, NULL, NUM_THREADS + 1);
57
58  for (i = 0; i < NUM_THREADS; i++)
59    pthread_create (&threads[i], NULL, child_function, NULL);
60
61  pthread_barrier_wait (&barrier);
62
63  volatile int dummy = 0;
64  while (1)
65    /* Dummy loop body to allow setting breakpoint.  */
66    dummy = !dummy; /* main break line */
67
68  return 0;
69}
70