| /* Test for shm_open cancellation handling: BZ #18243. |
| Copyright (C) 2016-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library 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 |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <pthread.h> |
| #include <sys/mman.h> |
| #include <semaphore.h> |
| #include <stdio.h> |
| #include <fcntl.h> |
| #include <unistd.h> |
| #include <errno.h> |
| #include <stdlib.h> |
| |
| static sem_t sem; /* Use to sync with thread start. */ |
| static const char shm_name[] = "/glibc-shm_open-cancel"; |
| |
| static void |
| remove_shm (int status, void *arg) |
| { |
| shm_unlink (shm_name); |
| } |
| |
| static void * |
| tf (void *arg) |
| { |
| pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, 0); |
| |
| if (sem_wait (&sem) != 0) |
| { |
| printf ("error: sem_wait failed: %m"); |
| exit (1); |
| } |
| |
| if (pthread_setcancelstate (PTHREAD_CANCEL_ENABLE, 0) != 0) |
| { |
| printf ("error: pthread_setcancelstate failed: %m"); |
| exit (1); |
| } |
| |
| /* Neither sem_unlink or sem_open should act on thread cancellation. */ |
| shm_unlink (shm_name); |
| on_exit (remove_shm, NULL); |
| |
| int fd = shm_open (shm_name, O_CREAT, 0600); |
| if (fd == -1) |
| { |
| int exit_code; |
| if (errno == ENOSYS || errno == EACCES) |
| exit_code = 77; |
| else |
| exit_code = 1; |
| exit (exit_code); |
| } |
| |
| if (pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, 0) != 0) |
| { |
| printf ("error: pthread_setcancelstate failed: %m"); |
| exit (1); |
| } |
| |
| if (close (fd) != 0) |
| { |
| printf ("error: pthread_setcancelstate failed: %m"); |
| exit (1); |
| } |
| |
| return NULL; |
| } |
| |
| static int |
| do_test (void) |
| { |
| pthread_t td; |
| |
| if (sem_init (&sem, 0, 0)) |
| { |
| printf ("error: sem_init failed: %m\n"); |
| exit (1); |
| } |
| |
| if (pthread_create (&td, NULL, tf, NULL) != 0) |
| { |
| printf ("error: pthread_create failed: %m\n"); |
| exit (1); |
| } |
| |
| if (pthread_cancel (td) != 0) |
| { |
| printf ("error: pthread_cancel failed: %m\n"); |
| exit (1); |
| } |
| |
| if (sem_post (&sem) != 0) |
| { |
| printf ("error: sem_post failed: %m\n"); |
| exit (1); |
| } |
| |
| void *r; |
| if (pthread_join (td, &r) != 0) |
| { |
| printf ("error: pthread_join failed: %m\n"); |
| exit (1); |
| } |
| |
| if (r == PTHREAD_CANCELED) |
| { |
| puts ("error: pthread_join returned PTHREAD_CANCELED"); |
| exit (1); |
| } |
| |
| return 0; |
| } |
| |
| #define TEST_FUNCTION do_test () |
| #include <test-skeleton.c> |