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120 lines
2.4 KiB
C
120 lines
2.4 KiB
C
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2008-2018 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <pthread.h>
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#include <assert.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#define NUMTHREADS 10
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volatile int done = 0;
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static pthread_barrier_t barrier;
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static void *
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start (void *arg)
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{
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while (!done)
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usleep (100);
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assert (0);
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return arg;
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}
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void *
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thread_function (void *arg)
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{
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int x = * (int *) arg;
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printf ("Thread <%d> executing\n", x);
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pthread_barrier_wait (&barrier);
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while (!done)
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usleep (100);
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return NULL;
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}
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void *
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thread_forker (void *arg)
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{
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int x = * (int *) arg;
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pid_t pid;
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int rv;
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int i;
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pthread_t thread;
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printf ("Thread forker <%d> executing\n", x);
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pthread_barrier_wait (&barrier);
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switch ((pid = fork ()))
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{
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case -1:
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assert (0);
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default:
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wait (&rv);
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done = 1;
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break;
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case 0:
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i = pthread_create (&thread, NULL, start, NULL);
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assert (i == 0);
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i = pthread_join (thread, NULL);
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assert (i == 0);
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assert (0);
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}
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return NULL;
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}
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int
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main (void)
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{
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pthread_t threads[NUMTHREADS];
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int args[NUMTHREADS];
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int i, j;
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alarm (600);
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i = pthread_barrier_init (&barrier, NULL, NUMTHREADS);
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assert (i == 0);
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/* Create a few threads that do mostly nothing, and then one that
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forks. */
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for (j = 0; j < NUMTHREADS - 1; ++j)
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{
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args[j] = j;
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pthread_create (&threads[j], NULL, thread_function, &args[j]);
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}
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args[j] = j;
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pthread_create (&threads[j], NULL, thread_forker, &args[j]);
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for (j = 0; j < NUMTHREADS; ++j)
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{
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pthread_join (threads[j], NULL);
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}
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return 0;
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}
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