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140 lines
3.1 KiB
C
140 lines
3.1 KiB
C
/* Test for shm_open cancellation handling: BZ #18243.
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Copyright (C) 2016-2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <pthread.h>
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#include <sys/mman.h>
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#include <semaphore.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <errno.h>
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#include <stdlib.h>
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static sem_t sem; /* Use to sync with thread start. */
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static char shm_name[sizeof "/glibc-shm_open-cancel-" + sizeof (pid_t) * 3];
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static void
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init_shm_name (void)
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{
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snprintf (shm_name, sizeof (shm_name), "/glibc-shm_open-cancel-%u",
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getpid ());
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}
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static void
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remove_shm (int status, void *arg)
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{
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shm_unlink (shm_name);
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}
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static void *
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tf (void *arg)
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{
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pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, 0);
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if (sem_wait (&sem) != 0)
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{
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printf ("error: sem_wait failed: %m");
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exit (1);
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}
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if (pthread_setcancelstate (PTHREAD_CANCEL_ENABLE, 0) != 0)
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{
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printf ("error: pthread_setcancelstate failed: %m");
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exit (1);
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}
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/* Neither sem_unlink or sem_open should act on thread cancellation. */
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shm_unlink (shm_name);
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on_exit (remove_shm, NULL);
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int fd = shm_open (shm_name, O_CREAT, 0600);
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if (fd == -1)
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{
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int exit_code;
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if (errno == ENOSYS || errno == EACCES)
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exit_code = 77;
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else
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exit_code = 1;
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exit (exit_code);
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}
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if (pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, 0) != 0)
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{
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printf ("error: pthread_setcancelstate failed: %m");
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exit (1);
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}
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if (close (fd) != 0)
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{
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printf ("error: pthread_setcancelstate failed: %m");
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exit (1);
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}
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return NULL;
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}
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static int
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do_test (void)
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{
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pthread_t td;
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init_shm_name ();
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if (sem_init (&sem, 0, 0))
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{
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printf ("error: sem_init failed: %m\n");
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exit (1);
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}
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if (pthread_create (&td, NULL, tf, NULL) != 0)
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{
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printf ("error: pthread_create failed: %m\n");
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exit (1);
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}
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if (pthread_cancel (td) != 0)
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{
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printf ("error: pthread_cancel failed: %m\n");
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exit (1);
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}
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if (sem_post (&sem) != 0)
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{
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printf ("error: sem_post failed: %m\n");
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exit (1);
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}
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void *r;
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if (pthread_join (td, &r) != 0)
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{
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printf ("error: pthread_join failed: %m\n");
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exit (1);
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}
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if (r == PTHREAD_CANCELED)
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{
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puts ("error: pthread_join returned PTHREAD_CANCELED");
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exit (1);
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}
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return 0;
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}
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#define TEST_FUNCTION do_test ()
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#include <test-skeleton.c>
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