non-stop-fair-events.c revision 1.3 
1/* This testcase is part of GDB, the GNU debugger.
2
3   Copyright 2014-2015 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#define SECONDS (TIMEOUT + 20)
28
29pthread_t child_thread[NUM_THREADS];
30volatile pthread_t signal_thread;
31volatile int got_sig;
32
33void
34handler (int signo)
35{
36  got_sig = 1;
37}
38
39void
40loop_broke (void)
41{
42}
43
44#define INF_LOOP				\
45  do						\
46    {						\
47      while (!got_sig)				\
48	;					\
49    }						\
50  while (0)
51
52void *
53child_function (void *arg)
54{
55  pthread_t self = pthread_self ();
56
57  while (1)
58    {
59      /* Reset the timer before going to INF_LOOP.  */
60      alarm (SECONDS);
61      INF_LOOP; /* set thread breakpoint here */
62      loop_broke ();
63    }
64}
65
66int
67main (void)
68{
69  int res;
70  int i;
71
72  signal (SIGUSR1, handler);
73
74  for (i = 0; i < NUM_THREADS; i++)
75    {
76      res = pthread_create (&child_thread[i], NULL, child_function, NULL);
77    }
78
79  while (1)
80    {
81      pthread_kill (signal_thread, SIGUSR1); /* set kill breakpoint here */
82      /* Reset the timer before going to INF_LOOP.  */
83      alarm (SECONDS);
84      INF_LOOP;
85      loop_broke ();
86    }
87
88  exit(EXIT_SUCCESS);
89}
90