gdb/testsuite/gdb.threads/manythreads.c

   1 /* Manythreads test program.
   2    Copyright 2004, 2006, 2007, 2008, 2009, 2010, 2011
   3    Free Software Foundation, Inc.
   4
   5    Written by Jeff Johnston <jjohnstn@redhat.com>
   6    Contributed by Red Hat
   7
   8    This file is part of GDB.
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  22
  23 #include <pthread.h>
  24 #include <stdio.h>
  25 #include <limits.h>
  26
  27 void *
  28 thread_function (void *arg)
  29 {
  30   int x = * (int *) arg;
  31
  32   printf ("Thread <%d> executing\n", x);
  33
  34   return NULL;
  35 }
  36
  37 int
  38 main (int argc, char **argv)
  39 {
  40   pthread_attr_t attr;
  41   pthread_t threads[256];
  42   int args[256];
  43   int i, j;
  44
  45   pthread_attr_init (&attr);
  46
  47 #ifdef PTHREAD_STACK_MIN
  48   pthread_attr_setstacksize (&attr, 2*PTHREAD_STACK_MIN);
  49 #endif
  50
  51   /* Create a ton of quick-executing threads, then wait for them to
  52      complete.  */
  53   for (i = 0; i < 1000; ++i)
  54     {
  55       for (j = 0; j < 256; ++j)
  56         {
  57           args[j] = i * 1000 + j;
  58           pthread_create (&threads[j], &attr, thread_function, &args[j]);
  59         }
  60
  61       for (j = 0; j < 256; ++j)
  62         {
  63           pthread_join (threads[j], NULL);
  64         }
  65     }
  66
  67   pthread_attr_destroy (&attr);
  68
  69   return 0;
  70 }