non-stop-fair-events.c revision 1.1 
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
26pthread_t child_thread[NUM_THREADS];
27volatile pthread_t signal_thread;
28volatile int got_sig;
29
30void
31handler (int signo)
32{
33  got_sig = 1;
34}
35
36void
37loop_broke (void)
38{
39}
40
41#define INF_LOOP				\
42  do						\
43    {						\
44      while (!got_sig)				\
45	;					\
46    }						\
47  while (0)
48
49void *
50child_function (void *arg)
51{
52  pthread_t self = pthread_self ();
53
54  while (1)
55    {
56      INF_LOOP; /* set thread breakpoint here */
57      loop_broke ();
58    }
59}
60
61int
62main (void)
63{
64  int res;
65  int i;
66
67  alarm (60);
68
69  signal (SIGUSR1, handler);
70
71  for (i = 0; i < NUM_THREADS; i++)
72    {
73      res = pthread_create (&child_thread[i], NULL, child_function, NULL);
74    }
75
76  while (1)
77    {
78      pthread_kill (signal_thread, SIGUSR1); /* set kill breakpoint here */
79      INF_LOOP;
80      loop_broke ();
81    }
82
83  exit(EXIT_SUCCESS);
84}
85