/* This testcase is part of GDB, the GNU debugger. Copyright 2014-2016 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include <pthread.h> #include <assert.h> #include <unistd.h> #include <stdlib.h> pthread_barrier_t barrier; volatile int second_child; void breakpoint_function (void) { /* GDB sets a breakpoint in this function. */ } void * child_function_0 (void *arg) { volatile unsigned int counter = 1; pthread_barrier_wait (&barrier); while (counter > 0) { counter++; usleep (1); if (second_child) continue; breakpoint_function (); } pthread_exit (NULL); } void * child_function_1 (void *arg) { volatile unsigned int counter = 1; pthread_barrier_wait (&barrier); while (counter > 0) { counter++; usleep (1); if (!second_child) continue; breakpoint_function (); } pthread_exit (NULL); } static int wait_threads (void) { return 1; /* in wait_threads */ } int main (void) { pthread_t child_thread[2]; int res; pthread_barrier_init (&barrier, NULL, 3); res = pthread_create (&child_thread[0], NULL, child_function_0, NULL); assert (res == 0); res = pthread_create (&child_thread[1], NULL, child_function_1, NULL); assert (res == 0); pthread_barrier_wait (&barrier); wait_threads (); /* set wait-thread breakpoint here */ pthread_join (child_thread[0], NULL); pthread_join (child_thread[1], NULL); exit (EXIT_SUCCESS); }