1 /* Manythreads test program. 2 Copyright 2004-2020 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 28 void * 29 thread_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 40 int 41 main (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