| /* This testcase is part of GDB, the GNU debugger. |
| |
| Copyright 2016-2020 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 <unistd.h> |
| #include <stdlib.h> |
| |
| #define NUM_THREADS 20 |
| const int num_threads = NUM_THREADS; |
| |
| static pthread_t child_thread[NUM_THREADS]; |
| |
| static pthread_barrier_t threads_started_barrier; |
| |
| volatile int always_zero; |
| volatile unsigned int dummy; |
| |
| static void |
| infinite_loop (void) |
| { |
| while (1) |
| { |
| dummy++; /* set breakpoint here */ |
| } |
| } |
| |
| static void * |
| child_function (void *arg) |
| { |
| pthread_barrier_wait (&threads_started_barrier); |
| |
| infinite_loop (); |
| } |
| |
| void |
| all_started (void) |
| { |
| } |
| |
| int |
| main (void) |
| { |
| int res; |
| int i; |
| |
| alarm (300); |
| |
| pthread_barrier_init (&threads_started_barrier, NULL, NUM_THREADS + 1); |
| |
| for (i = 0; i < NUM_THREADS; i++) |
| { |
| res = pthread_create (&child_thread[i], NULL, child_function, NULL); |
| } |
| |
| /* Wait until all threads have been scheduled. */ |
| pthread_barrier_wait (&threads_started_barrier); |
| |
| all_started (); |
| |
| infinite_loop (); |
| } |