1 /* This testcase is part of GDB, the GNU debugger.
2
3 Copyright 2015-2020 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 <assert.h>
19 #include <pthread.h>
20 #include <unistd.h>
21
22 /* Number of threads. Each thread continuously steps over a
23 breakpoint. */
24 #define NTHREADS 10
25
26 pthread_t threads[NTHREADS];
27
28 pthread_barrier_t barrier;
29
30 /* Used to create a conditional breakpoint that always fails. */
31 volatile int zero;
32
33 static void *
thread_func(void * arg)34 thread_func (void *arg)
35 {
36 pthread_barrier_wait (&barrier);
37
38 while (1)
39 {
40 usleep (1); /* set break here */
41 }
42
43 return NULL;
44 }
45
46 int
main(void)47 main (void)
48 {
49 int ret;
50 int i;
51
52 /* Don't run forever. */
53 alarm (180);
54
55 pthread_barrier_init (&barrier, NULL, NTHREADS + 1);
56
57 /* Start the threads that constantly hits a conditional breakpoint
58 that needs to be stepped over. */
59 for (i = 0; i < NTHREADS; i++)
60 {
61 ret = pthread_create (&threads[i], NULL, thread_func, NULL);
62 assert (ret == 0);
63 }
64
65 /* Wait until all threads are up and running. */
66 pthread_barrier_wait (&barrier);
67
68 /* Let them start hitting the breakpoint. */
69 usleep (100);
70
71 /* Exit abruptly. */
72 return 0;
73 }
74