197 lines
3.9 KiB
C
197 lines
3.9 KiB
C
/* Copyright (C) 2002-2022 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 <errno.h>
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#include <pthread.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <sys/wait.h>
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#include <string.h>
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static sigset_t ss;
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static pthread_barrier_t *b;
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static void *
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tf (void *arg)
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{
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pthread_barrier_wait (b);
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puts ("child: calling sigwait now");
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int sig;
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int err;
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err = sigwait (&ss, &sig);
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if (err != 0)
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{
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printf ("sigwait returned unsuccessfully: %s (%d)\n",
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strerror (err), err);
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_exit (1);
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}
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puts ("sigwait returned");
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if (sig != SIGINT)
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{
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printf ("caught signal %d, expected %d (SIGINT)\n", sig, SIGINT);
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_exit (1);
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}
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puts ("child thread terminating now");
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return NULL;
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}
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static void
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receiver (void)
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{
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pthread_t th;
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/* Make sure the process doesn't run forever. */
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alarm (10);
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sigfillset (&ss);
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if (pthread_sigmask (SIG_SETMASK, &ss, NULL) != 0)
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{
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puts ("1st pthread_sigmask failed");
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_exit (1);
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}
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if (pthread_create (&th, NULL, tf, NULL) != 0)
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{
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puts ("pthread_create failed");
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_exit (1);
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}
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if (pthread_join (th, NULL) != 0)
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{
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puts ("thread didn't join");
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_exit (1);
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}
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puts ("join succeeded");
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_exit (0);
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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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char tmp[] = "/tmp/tst-signal1-XXXXXX";
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int fd = mkstemp (tmp);
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if (fd == -1)
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{
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puts ("mkstemp failed");
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exit (1);
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}
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unlink (tmp);
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int i;
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for (i = 0; i < 20; ++i)
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write (fd, "foobar xyzzy", 12);
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b = mmap (NULL, sizeof (pthread_barrier_t), PROT_READ | PROT_WRITE,
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MAP_SHARED, fd, 0);
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if (b == MAP_FAILED)
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{
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puts ("mmap failed");
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exit (1);
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}
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pthread_barrierattr_t ba;
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if (pthread_barrierattr_init (&ba) != 0)
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{
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puts ("barrierattr_init failed");
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exit (1);
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}
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if (pthread_barrierattr_setpshared (&ba, PTHREAD_PROCESS_SHARED) != 0)
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{
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puts ("barrierattr_setpshared failed");
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exit (1);
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}
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if (pthread_barrier_init (b, &ba, 2) != 0)
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{
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puts ("barrier_init failed");
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exit (1);
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}
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if (pthread_barrierattr_destroy (&ba) != 0)
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{
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puts ("barrierattr_destroy failed");
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exit (1);
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}
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pid_t pid = fork ();
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if (pid == -1)
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{
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puts ("fork failed");
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exit (1);
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}
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if (pid == 0)
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receiver ();
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pthread_barrier_wait (b);
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/* Wait a bit more. */
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struct timespec ts = { .tv_sec = 0, .tv_nsec = 10000000 };
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nanosleep (&ts, NULL);
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/* Send the signal. */
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puts ("sending the signal now");
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kill (pid, SIGINT);
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/* Wait for the process to terminate. */
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int status;
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if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
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{
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puts ("wrong child reported terminated");
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exit (1);
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}
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if (!WIFEXITED (status))
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{
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if (WIFSIGNALED (status))
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printf ("child exited with signal %d\n", WTERMSIG (status));
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else
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puts ("child didn't exit normally");
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exit (1);
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}
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if (WEXITSTATUS (status) != 0)
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{
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printf ("exit status %d != 0\n", WEXITSTATUS (status));
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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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