| /* This testcase is part of GDB, the GNU debugger. |
| |
| Copyright 2008-2015 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 <stdio.h> |
| #include <stdlib.h> |
| #include <errno.h> |
| #include <unistd.h> |
| #include <sys/types.h> |
| #include <sys/wait.h> |
| |
| #define NUMTHREADS 10 |
| |
| volatile int done = 0; |
| static pthread_barrier_t barrier; |
| |
| static void * |
| start (void *arg) |
| { |
| while (!done) |
| usleep (100); |
| assert (0); |
| return arg; |
| } |
| |
| void * |
| thread_function (void *arg) |
| { |
| int x = * (int *) arg; |
| |
| printf ("Thread <%d> executing\n", x); |
| |
| pthread_barrier_wait (&barrier); |
| |
| while (!done) |
| usleep (100); |
| |
| return NULL; |
| } |
| |
| void * |
| thread_forker (void *arg) |
| { |
| int x = * (int *) arg; |
| pid_t pid; |
| int rv; |
| int i; |
| pthread_t thread; |
| |
| printf ("Thread forker <%d> executing\n", x); |
| |
| pthread_barrier_wait (&barrier); |
| |
| switch ((pid = fork ())) |
| { |
| case -1: |
| assert (0); |
| default: |
| wait (&rv); |
| done = 1; |
| break; |
| case 0: |
| i = pthread_create (&thread, NULL, start, NULL); |
| assert (i == 0); |
| i = pthread_join (thread, NULL); |
| assert (i == 0); |
| |
| assert (0); |
| } |
| |
| return NULL; |
| } |
| |
| int |
| main (void) |
| { |
| pthread_t threads[NUMTHREADS]; |
| int args[NUMTHREADS]; |
| int i, j; |
| |
| alarm (600); |
| |
| i = pthread_barrier_init (&barrier, NULL, NUMTHREADS); |
| assert (i == 0); |
| |
| /* Create a few threads that do mostly nothing, and then one that |
| forks. */ |
| for (j = 0; j < NUMTHREADS - 1; ++j) |
| { |
| args[j] = j; |
| pthread_create (&threads[j], NULL, thread_function, &args[j]); |
| } |
| |
| args[j] = j; |
| pthread_create (&threads[j], NULL, thread_forker, &args[j]); |
| |
| for (j = 0; j < NUMTHREADS; ++j) |
| { |
| pthread_join (threads[j], NULL); |
| } |
| |
| return 0; |
| } |