user-selected-context-sync.c revision 1.1.1.2 
1/* This testcase is part of GDB, the GNU debugger.
2
3   Copyright 2016-2017 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  while (1); /* thread loop line */
31}
32
33static void *
34child_function (void *args)
35{
36  pthread_barrier_wait (&barrier);
37
38  child_sub_function (); /* thread caller line */
39
40  return NULL;
41}
42
43int
44main (void)
45{
46  int i = 0;
47  pthread_t threads[NUM_THREADS];
48
49  /* Make the test exit eventually.  */
50  alarm (20);
51
52  /* Initialize the barrier, NUM_THREADS plus the main thread.  */
53  pthread_barrier_init (&barrier, NULL, NUM_THREADS + 1);
54
55  for (i = 0; i < NUM_THREADS; i++)
56    pthread_create (&threads[i], NULL, child_function, NULL);
57
58  pthread_barrier_wait (&barrier);
59
60  while (1); /* main break line */
61
62  return 0;
63}
64