| /* This testcase is part of GDB, the GNU debugger. |
| |
| Copyright 2009-2017 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> |
| #include <stdio.h> |
| #include <string.h> |
| #include <assert.h> |
| |
| static const char *image; |
| static volatile pthread_t main_thread; |
| static pthread_barrier_t barrier; |
| static char *argv1 = "go away"; |
| |
| static void * |
| thread_execler (void *arg) |
| { |
| int i; |
| |
| pthread_barrier_wait (&barrier); |
| |
| i = pthread_join (main_thread, NULL); |
| assert (i == 0); |
| |
| /* Exec ourselves again. */ |
| if (execl (image, image, argv1, NULL) == -1) /* break-here */ |
| { |
| perror ("execl"); |
| abort (); |
| } |
| |
| return NULL; |
| } |
| |
| static void * |
| just_loop (void *arg) |
| { |
| unsigned int i; |
| |
| pthread_barrier_wait (&barrier); |
| |
| for (i = 1; i > 0; i++) |
| usleep (1); |
| |
| return NULL; |
| } |
| |
| #define THREADS 5 |
| |
| pthread_t loop_thread[THREADS]; |
| |
| int |
| main (int argc, char **argv) |
| { |
| pthread_t thread; |
| int i, t; |
| |
| image = argv[0]; |
| |
| /* Pass "inf" as argument to keep re-execing ad infinitum, which can |
| be useful for manual testing. Passing any other argument exits |
| immediately (and that's what the execl above does by |
| default). */ |
| if (argc == 2 && strcmp (argv[1], "inf") == 0) |
| argv1 = argv[1]; |
| else if (argc > 1) |
| exit (0); |
| |
| main_thread = pthread_self (); |
| |
| pthread_barrier_init (&barrier, NULL, 2 + THREADS); |
| |
| i = pthread_create (&thread, NULL, thread_execler, NULL); |
| assert (i == 0); |
| |
| for (t = 0; t < THREADS; t++) |
| { |
| i = pthread_create (&loop_thread[t], NULL, just_loop, NULL); |
| assert (i == 0); |
| } |
| |
| pthread_barrier_wait (&barrier); |
| |
| pthread_exit (NULL); |
| /* NOTREACHED */ |
| return 0; |
| } |