gdb/testsuite/gdb.threads/manythreads.c

   1 /* Manythreads test program.
   2    Copyright 2004, 2006, 2007, 2008, 2009, 2010 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 #include <stdio.h>
  24 #include <limits.h>
  25
  26 void *
  27 thread_function (void *arg)
  28 {
  29   int x = * (int *) arg;
  30
  31   printf ("Thread <%d> executing\n", x);
  32
  33   return NULL;
  34 }
  35
  36 int
  37 main (int argc, char **argv)
  38 {
  39   pthread_attr_t attr;
  40   pthread_t threads[256];
  41   int args[256];
  42   int i, j;
  43
  44   pthread_attr_init (&attr);
  45
  46 #ifdef PTHREAD_STACK_MIN
  47   pthread_attr_setstacksize (&attr, 2*PTHREAD_STACK_MIN);
  48 #endif
  49
  50   /* Create a ton of quick-executing threads, then wait for them to
  51      complete.  */
  52   for (i = 0; i < 1000; ++i)
  53     {
  54       for (j = 0; j < 256; ++j)
  55         {
  56           args[j] = i * 1000 + j;
  57           pthread_create (&threads[j], &attr, thread_function, &args[j]);
  58         }
  59
  60       for (j = 0; j < 256; ++j)
  61         {
  62           pthread_join (threads[j], NULL);
  63         }
  64     }
  65
  66   pthread_attr_destroy (&attr);
  67
  68   return 0;
  69 }