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#include <signal.h>
22
23#define NUM_THREADS 10
24const int num_threads = NUM_THREADS;
25/* Allow for as much timeout as DejaGnu wants, plus a bit of
26   slack.  */
27
28volatile unsigned int timeout = TIMEOUT;
29#define SECONDS (timeout + 20)
30
31pthread_t child_thread[NUM_THREADS];
32volatile pthread_t signal_thread;
33volatile int got_sig;
34
35void
36handler (int signo)
37{
38  got_sig = 1;
39}
40
41void
42loop_broke (void)
43{
44}
45
46#define INF_LOOP				\
47  do						\
48    {						\
49      while (!got_sig)				\
50	;					\
51    }						\
52  while (0)
53
54void *
55child_function (void *arg)
56{
57  pthread_t self = pthread_self ();
58
59  while (1)
60    {
61      /* Reset the timer before going to INF_LOOP.  */
62      alarm (SECONDS);
63      INF_LOOP; /* set thread breakpoint here */
64      loop_broke ();
65    }
66}
67
68int
69main (void)
70{
71  int res;
72  int i;
73
74  /* Call these early so that we're sure their PLTs are quickly
75     resolved now, instead of in the busy threads.  */
76  pthread_kill (pthread_self (), 0);
77  alarm (0);
78
79  signal (SIGUSR1, handler);
80
81  for (i = 0; i < NUM_THREADS; i++)
82    {
83      res = pthread_create (&child_thread[i], NULL, child_function, NULL);
84    }
85
86  while (1)
87    {
88      pthread_kill (signal_thread, SIGUSR1); /* set kill breakpoint here */
89      /* Reset the timer before going to INF_LOOP.  */
90      alarm (SECONDS);
91      INF_LOOP;
92      loop_broke ();
93    }
94
95  exit(EXIT_SUCCESS);
96}
97