| /* 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/types.h> |
| #include <sys/wait.h> |
| #include <errno.h> |
| #include <assert.h> |
| #include <limits.h> |
| |
| /* Number of threads doing forks. */ |
| #define N_FORKERS 4 |
| |
| static void * |
| forker (void *arg) |
| { |
| for (;;) |
| { |
| pid_t pid = FORK_FUNC (); |
| |
| if (pid == 0) |
| _exit (11); |
| |
| assert (pid > 0); |
| |
| /* Wait for children to exit. */ |
| int ret; |
| int stat; |
| do |
| { |
| ret = waitpid (pid, &stat, 0); |
| } while (ret == EINTR); |
| |
| assert (ret == pid); |
| assert (WIFEXITED (stat)); |
| assert (WEXITSTATUS (stat) == 11); |
| |
| /* We need a sleep, otherwise the forking threads spam events and the |
| stepping thread doesn't make progress. Sleep for a bit less than |
| `sleep_a_bit` does, so that forks are likely to interrupt a "next". */ |
| usleep (40 * 1000); |
| } |
| |
| return NULL; |
| } |
| |
| static void |
| sleep_a_bit (void) |
| { |
| usleep (1000 * 50); |
| } |
| |
| int |
| main (void) |
| { |
| int i; |
| |
| alarm (60); |
| |
| pthread_t thread[N_FORKERS]; |
| for (i = 0; i < N_FORKERS; ++i) |
| { |
| int ret = pthread_create (&thread[i], NULL, forker, NULL); |
| assert (ret == 0); |
| } |
| |
| for (i = 0; i < INT_MAX; ++i) /* for loop */ |
| { |
| sleep_a_bit (); /* break here */ |
| sleep_a_bit (); /* other line */ |
| } |
| |
| for (i = 0; i < N_FORKERS; ++i) |
| pthread_join (thread[i], NULL); |
| |
| return 0; |
| } |