1/* Manythreads test program.
2   Copyright 2004-2023 Free Software Foundation, Inc.
3
4   Written by Jeff Johnston <jjohnstn@redhat.com>
5   Contributed by Red Hat
6
7   This file is part of GDB.
8
9   This program is free software; you can redistribute it and/or modify
10   it under the terms of the GNU General Public License as published by
11   the Free Software Foundation; either version 3 of the License, or
12   (at your option) any later version.
13
14   This program is distributed in the hope that it will be useful,
15   but WITHOUT ANY WARRANTY; without even the implied warranty of
16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17   GNU General Public License for more details.
18
19   You should have received a copy of the GNU General Public License
20   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
21
22#include <pthread.h>
23#ifdef DEBUG
24#include <stdio.h>
25#endif
26#include <limits.h>
27
28void *
29thread_function (void *arg)
30{
31  int x = * (int *) arg;
32
33#ifdef DEBUG
34  printf ("Thread <%d> executing\n", x);
35#endif /* DEBUG */
36
37  return NULL;
38}
39
40int
41main (int argc, char **argv)
42{
43  pthread_attr_t attr;
44  pthread_t threads[256];
45  int args[256];
46  int i, j;
47
48  pthread_attr_init (&attr);
49
50#ifdef PTHREAD_STACK_MIN
51  pthread_attr_setstacksize (&attr, 2*PTHREAD_STACK_MIN);
52#endif
53
54  /* Create a ton of quick-executing threads, then wait for them to
55     complete.  */
56  for (i = 0; i < 1000; ++i)
57    {
58      for (j = 0; j < 256; ++j)
59	{
60	  args[j] = i * 1000 + j;
61	  pthread_create (&threads[j], &attr, thread_function, &args[j]);
62	}
63
64      for (j = 0; j < 256; ++j)
65	{
66	  pthread_join (threads[j], NULL);
67	}
68    }
69
70  pthread_attr_destroy (&attr);
71
72  return 0;
73}
74