| /* This testcase is part of GDB, the GNU debugger. |
| |
| Copyright 2022 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 <sys/syscall.h> |
| |
| #define NUM_THREADS 32 |
| |
| pthread_barrier_t barrier; |
| |
| static void |
| do_exit (int exitcode) |
| { |
| /* Synchronize all threads up to here so that they all exit at |
| roughly the same time. */ |
| pthread_barrier_wait (&barrier); |
| |
| /* All threads exit with SYS_exit, even the main thread, to avoid |
| exiting with a group-exit syscall, as that syscall changes the |
| exit status of all still-alive threads, thus potentially masking |
| a bug. */ |
| syscall (SYS_exit, exitcode); |
| } |
| |
| static void * |
| start (void *arg) |
| { |
| int thread_return_value = *(int *) arg; |
| |
| do_exit (thread_return_value); |
| } |
| |
| int |
| main(void) |
| { |
| pthread_t threads[NUM_THREADS]; |
| int thread_return_val[NUM_THREADS]; |
| int i; |
| |
| pthread_barrier_init (&barrier, NULL, NUM_THREADS + 1); |
| |
| for (i = 0; i < NUM_THREADS; ++i) |
| { |
| thread_return_val[i] = i + 2; |
| pthread_create (&threads[i], NULL, start, &thread_return_val[i]); |
| } |
| |
| do_exit (1); |
| } |