gdb/testsuite/gdb.threads/manythreads.c

   1 /* Manythreads test program.
   2    Copyright 2004, 2006, 2007 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 2 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, write to the Free Software
  21    Foundation, Inc., 59 Temple Place - Suite 330,
  22    Boston, MA 02111-1307, USA.  */
  23
  24 #include <pthread.h>
  25 #include <stdio.h>
  26 #include <limits.h>
  27
  28 void *
  29 thread_function (void *arg)
  30 {
  31   int x = * (int *) arg;
  32
  33   printf ("Thread <%d> executing\n", x);
  34
  35   return NULL;
  36 }
  37
  38 int
  39 main (int argc, char **argv)
  40 {
  41   pthread_attr_t attr;
  42   pthread_t threads[256];
  43   int args[256];
  44   int i, j;
  45
  46   pthread_attr_init (&attr);
  47   pthread_attr_setstacksize (&attr, PTHREAD_STACK_MIN);
  48
  49   /* Create a ton of quick-executing threads, then wait for them to
  50      complete.  */
  51   for (i = 0; i < 1000; ++i)
  52     {
  53       for (j = 0; j < 256; ++j)
  54         {
  55           args[j] = i * 1000 + j;
  56           pthread_create (&threads[j], &attr, thread_function, &args[j]);
  57         }
  58
  59       for (j = 0; j < 256; ++j)
  60         {
  61           pthread_join (threads[j], NULL);
  62         }
  63     }
  64
  65   pthread_attr_destroy (&attr);
  66
  67   return 0;
  68 }