mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-08 14:20:07 +00:00
93 lines
2.5 KiB
C
93 lines
2.5 KiB
C
/* Test that raise sends signal to current thread even if blocked.
|
|
Copyright (C) 2021-2024 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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <signal.h>
|
|
#include <support/check.h>
|
|
#include <support/xsignal.h>
|
|
#include <support/xthread.h>
|
|
#include <pthread.h>
|
|
#include <unistd.h>
|
|
|
|
/* Used to create a dummy thread ID distinct from all other thread
|
|
IDs. */
|
|
static void *
|
|
noop (void *ignored)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static volatile pthread_t signal_thread;
|
|
|
|
static void
|
|
signal_handler (int signo)
|
|
{
|
|
signal_thread = pthread_self ();
|
|
}
|
|
|
|
/* Used to ensure that waiting_thread has launched and can accept
|
|
signals. */
|
|
static pthread_barrier_t barrier;
|
|
|
|
static void *
|
|
waiting_thread (void *ignored)
|
|
{
|
|
xpthread_barrier_wait (&barrier);
|
|
pause ();
|
|
return NULL;
|
|
}
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
xsignal (SIGUSR1, signal_handler);
|
|
xpthread_barrier_init (&barrier, NULL, 2);
|
|
|
|
/* Distinct thread ID value to */
|
|
pthread_t dummy = xpthread_create (NULL, noop, NULL);
|
|
signal_thread = dummy;
|
|
|
|
pthread_t helper = xpthread_create (NULL, waiting_thread, NULL);
|
|
|
|
/* Make sure that the thread is running. */
|
|
xpthread_barrier_wait (&barrier);
|
|
|
|
/* Block signals on this thread. */
|
|
sigset_t set;
|
|
sigfillset (&set);
|
|
xpthread_sigmask (SIG_BLOCK, &set, NULL);
|
|
|
|
/* Send the signal to this thread. It must not be delivered. */
|
|
raise (SIGUSR1);
|
|
TEST_VERIFY (signal_thread == dummy);
|
|
|
|
/* Wait a bit to give a chance for signal delivery (increases
|
|
chances of failure with bug 28407). */
|
|
usleep (50 * 1000);
|
|
|
|
/* Unblocking should cause synchronous delivery of the signal. */
|
|
xpthread_sigmask (SIG_UNBLOCK, &set, NULL);
|
|
TEST_VERIFY (signal_thread == pthread_self ());
|
|
|
|
xpthread_cancel (helper);
|
|
xpthread_join (helper);
|
|
xpthread_join (dummy);
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|