1 /* A small multi-threaded test case.
2
3 Copyright 2004-2021 Free Software Foundation, Inc.
4
5 This file is part of GDB.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19
20 #include <pthread.h>
21 #include <stdio.h>
22 #include <time.h>
23 #include <unistd.h>
24
25 void
cond_wait(pthread_cond_t * cond,pthread_mutex_t * mut)26 cond_wait (pthread_cond_t *cond, pthread_mutex_t *mut)
27 {
28 pthread_mutex_lock(mut);
29 pthread_cond_wait (cond, mut);
30 pthread_mutex_unlock (mut);
31 }
32
33 void
noreturn(void)34 noreturn (void)
35 {
36 pthread_mutex_t mut;
37 pthread_cond_t cond;
38
39 pthread_mutex_init (&mut, NULL);
40 pthread_cond_init (&cond, NULL);
41
42 /* Wait for a condition that will never be signaled, so we effectively
43 block the thread here. */
44 cond_wait (&cond, &mut);
45 }
46
47 void *
forever_pthread(void * unused)48 forever_pthread (void *unused)
49 {
50 noreturn ();
51 }
52
53 void
break_me(void)54 break_me (void)
55 {
56 /* Just an anchor to help putting a breakpoint. */
57 }
58
59 int
main(void)60 main (void)
61 {
62 pthread_t forever;
63
64 pthread_create (&forever, NULL, forever_pthread, NULL);
65 for (;;)
66 {
67 sleep (2);
68 break_me();
69 }
70
71 return 0;
72 }
73
74