1/* This testcase is part of GDB, the GNU debugger.
2
3   Copyright 2014-2020 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#include <signal.h>
23
24pthread_barrier_t barrier;
25
26void
27handler (int sig)
28{
29}
30
31void *
32thread_function (void *arg)
33{
34  pthread_barrier_wait (&barrier);
35
36  while (1)
37    usleep (1);
38}
39
40int
41main (void)
42{
43  pthread_t child_thread[2];
44  int i;
45
46  signal (SIGUSR1, handler);
47
48  pthread_barrier_init (&barrier, NULL, 3);
49
50  for (i = 0; i < 2; i++)
51    pthread_create (&child_thread[i], NULL, thread_function, NULL);
52
53  pthread_barrier_wait (&barrier);
54
55  pthread_kill (child_thread[0], SIGUSR1);
56
57  for (i = 0; i < 2; i++)
58    pthread_join (child_thread[i], NULL);
59
60  return 0;
61}
62