1 /* This testcase is part of GDB, the GNU debugger. 2 3 Copyright 2016-2019 Free Software Foundation, Inc. 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 3 of the License, or 8 (at your option) any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 17 18 #include <pthread.h> 19 #include <unistd.h> 20 #include <stdlib.h> 21 22 #define NUM_THREADS 20 23 const int num_threads = NUM_THREADS; 24 25 static pthread_t child_thread[NUM_THREADS]; 26 27 static pthread_barrier_t threads_started_barrier; 28 29 volatile int always_zero; 30 volatile unsigned int dummy; 31 32 static void 33 infinite_loop (void) 34 { 35 while (1) 36 { 37 dummy++; /* set breakpoint here */ 38 } 39 } 40 41 static void * 42 child_function (void *arg) 43 { 44 pthread_barrier_wait (&threads_started_barrier); 45 46 infinite_loop (); 47 } 48 49 void 50 all_started (void) 51 { 52 } 53 54 int 55 main (void) 56 { 57 int res; 58 int i; 59 60 alarm (300); 61 62 pthread_barrier_init (&threads_started_barrier, NULL, NUM_THREADS + 1); 63 64 for (i = 0; i < NUM_THREADS; i++) 65 { 66 res = pthread_create (&child_thread[i], NULL, child_function, NULL); 67 } 68 69 /* Wait until all threads have been scheduled. */ 70 pthread_barrier_wait (&threads_started_barrier); 71 72 all_started (); 73 74 infinite_loop (); 75 } 76