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103 lines
2.3 KiB
C
103 lines
2.3 KiB
C
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2009-2018 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 <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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static const char *image;
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static volatile pthread_t main_thread;
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static pthread_barrier_t barrier;
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static char *argv1 = "go away";
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static void *
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thread_execler (void *arg)
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{
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int i;
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pthread_barrier_wait (&barrier);
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i = pthread_join (main_thread, NULL);
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assert (i == 0);
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/* Exec ourselves again. */
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if (execl (image, image, argv1, NULL) == -1) /* break-here */
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{
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perror ("execl");
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abort ();
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}
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return NULL;
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}
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static void *
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just_loop (void *arg)
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{
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unsigned int i;
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pthread_barrier_wait (&barrier);
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for (i = 1; i > 0; i++)
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usleep (1);
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return NULL;
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}
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#define THREADS 5
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pthread_t loop_thread[THREADS];
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int
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main (int argc, char **argv)
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{
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pthread_t thread;
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int i, t;
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image = argv[0];
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/* Pass "inf" as argument to keep re-execing ad infinitum, which can
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be useful for manual testing. Passing any other argument exits
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immediately (and that's what the execl above does by
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default). */
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if (argc == 2 && strcmp (argv[1], "inf") == 0)
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argv1 = argv[1];
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else if (argc > 1)
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exit (0);
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main_thread = pthread_self ();
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pthread_barrier_init (&barrier, NULL, 2 + THREADS);
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i = pthread_create (&thread, NULL, thread_execler, NULL);
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assert (i == 0);
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for (t = 0; t < THREADS; t++)
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{
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i = pthread_create (&loop_thread[t], NULL, just_loop, NULL);
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assert (i == 0);
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}
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pthread_barrier_wait (&barrier);
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pthread_exit (NULL);
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/* NOTREACHED */
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return 0;
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}
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