1 /* This testcase is part of GDB, the GNU debugger. 2 3 Copyright 2015-2023 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 <assert.h> 19 #include <pthread.h> 20 #include <unistd.h> 21 22 /* Number of threads. Each thread continuously steps over a 23 breakpoint. */ 24 #define NTHREADS 10 25 26 pthread_t threads[NTHREADS]; 27 28 pthread_barrier_t barrier; 29 30 /* Used to create a conditional breakpoint that always fails. */ 31 volatile int zero; 32 33 static void * 34 thread_func (void *arg) 35 { 36 pthread_barrier_wait (&barrier); 37 38 while (1) 39 { 40 usleep (1); /* set break here */ 41 } 42 43 return NULL; 44 } 45 46 int 47 main (void) 48 { 49 int ret; 50 int i; 51 52 /* Don't run forever. */ 53 alarm (180); 54 55 pthread_barrier_init (&barrier, NULL, NTHREADS + 1); 56 57 /* Start the threads that constantly hits a conditional breakpoint 58 that needs to be stepped over. */ 59 for (i = 0; i < NTHREADS; i++) 60 { 61 ret = pthread_create (&threads[i], NULL, thread_func, NULL); 62 assert (ret == 0); 63 } 64 65 /* Wait until all threads are up and running. */ 66 pthread_barrier_wait (&barrier); 67 68 /* Let them start hitting the breakpoint. */ 69 usleep (100); 70 71 /* Exit abruptly. */ 72 return 0; 73 } 74