1/* This testcase is part of GDB, the GNU debugger.
2
3   Copyright 2014-2023 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#include <pthread.h>
19#include <unistd.h>
20#include <stdlib.h>
21
22pthread_barrier_t barrier;
23pthread_t child_thread;
24
25volatile unsigned int counter = 1;
26volatile unsigned int watch_me;
27volatile unsigned int other;
28
29void *
30child_function (void *arg)
31{
32  pthread_barrier_wait (&barrier);
33
34  while (counter > 0)
35    {
36      counter++;
37
38      watch_me = 1; /* set breakpoint child here */
39      other = 1;
40      usleep (1);
41    }
42
43  pthread_exit (NULL);
44}
45
46int
47main ()
48{
49  int res;
50  long i;
51
52  alarm (300);
53
54  pthread_barrier_init (&barrier, NULL, 2);
55
56  res = pthread_create (&child_thread, NULL, child_function, NULL);
57  pthread_barrier_wait (&barrier);
58
59  /* Use an infinite loop with no function calls so that "step" over
60     this line never finishes before the watchpoint in the other
61     thread triggers.  That can happen if the step-over of thread 2 is
62     done with displaced stepping on a target that is always in
63     non-stop mode, as in that case GDB runs both threads
64     simultaneously.  */
65  while (1); /* set wait-thread breakpoint here */
66
67  pthread_join (child_thread, NULL);
68
69  exit (EXIT_SUCCESS);
70}
71