mirror of
https://https.git.savannah.gnu.org/git/gnulib.git
synced 2026-04-28 06:33:36 +00:00
a297266a67
Reported by Pádraig Brady. * tests/test-pthread_sigmask2.c (main): Reestablish the signal handler after SIGINT arrived. * tests/test-sigdelay2.c (main): Likewise.
152 lines
4.0 KiB
C
152 lines
4.0 KiB
C
/* Test of pthread_sigmask in a multi-threaded process.
|
|
Copyright (C) 2011-2026 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 <https://www.gnu.org/licenses/>. */
|
|
|
|
/* Written by Bruno Haible <bruno@clisp.org>, 2011. */
|
|
|
|
#include <config.h>
|
|
|
|
#include <signal.h>
|
|
|
|
#include <errno.h>
|
|
#include <pthread.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
|
|
#include "virtualbox.h"
|
|
#include "macros.h"
|
|
|
|
#if USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS
|
|
|
|
static pthread_t main_thread;
|
|
static pthread_t killer_thread1;
|
|
static pthread_t killer_thread2;
|
|
|
|
static void *
|
|
killer_thread1_func (_GL_UNUSED void *arg)
|
|
{
|
|
sleep (1);
|
|
pthread_kill (main_thread, SIGINT);
|
|
return NULL;
|
|
}
|
|
|
|
static void *
|
|
killer_thread2_func (_GL_UNUSED void *arg)
|
|
{
|
|
sleep (1);
|
|
pthread_kill (pthread_self (), SIGINT);
|
|
return NULL;
|
|
}
|
|
|
|
static volatile int sigint_occurred;
|
|
|
|
static void
|
|
sigint_handler (_GL_UNUSED int sig)
|
|
{
|
|
sigint_occurred++;
|
|
}
|
|
|
|
int
|
|
main ()
|
|
{
|
|
/* This test occasionally fails on Linux (glibc or musl libc), in a
|
|
VirtualBox VM with paravirtualization = Default or KVM, with ≥ 2 CPUs,
|
|
when "Nested VT-x/AMD-V" and "PAE/NX" are not both enabled.
|
|
Skip the test in this situation. */
|
|
if (is_running_under_virtualbox_kvm () && num_cpus () > 1)
|
|
{
|
|
fputs ("Skipping test: avoiding VirtualBox bug with KVM paravirtualization\n",
|
|
stderr);
|
|
return 77;
|
|
}
|
|
|
|
signal (SIGINT, sigint_handler);
|
|
|
|
sigset_t set;
|
|
sigemptyset (&set);
|
|
sigaddset (&set, SIGINT);
|
|
|
|
/* Check error handling. */
|
|
/* This call returns 0 on NetBSD 8.0. */
|
|
#if !defined __NetBSD__
|
|
ASSERT (pthread_sigmask (1729, &set, NULL) == EINVAL);
|
|
#endif
|
|
|
|
/* Block SIGINT. */
|
|
ASSERT (pthread_sigmask (SIG_BLOCK, &set, NULL) == 0);
|
|
|
|
/* Request a SIGINT signal from another thread. */
|
|
main_thread = pthread_self ();
|
|
ASSERT (pthread_create (&killer_thread1, NULL, killer_thread1_func, NULL)
|
|
== 0);
|
|
|
|
/* Wait. */
|
|
sleep (2);
|
|
|
|
/* The signal should not have arrived yet, because it is blocked. */
|
|
ASSERT (sigint_occurred == 0);
|
|
|
|
/* Unblock SIGINT. */
|
|
ASSERT (pthread_sigmask (SIG_UNBLOCK, &set, NULL) == 0);
|
|
|
|
/* The signal should have arrived now, because POSIX says
|
|
"If there are any pending unblocked signals after the call to
|
|
pthread_sigmask(), at least one of those signals shall be delivered
|
|
before the call to pthread_sigmask() returns." */
|
|
ASSERT (sigint_occurred == 1);
|
|
|
|
/* On SystemV derivatives, we need to reestablish the signal handler. */
|
|
#if defined __sun || defined _AIX /* Solaris, AIX */
|
|
signal (SIGINT, sigint_handler);
|
|
#endif
|
|
|
|
/* Request a SIGINT signal from another thread. */
|
|
ASSERT (pthread_create (&killer_thread2, NULL, killer_thread2_func, NULL)
|
|
== 0);
|
|
|
|
/* Block SIGINT. */
|
|
ASSERT (pthread_sigmask (SIG_BLOCK, &set, NULL) == 0);
|
|
|
|
/* Wait. */
|
|
sleep (2);
|
|
|
|
/* The signal should have arrived yet, because it is blocked only in the
|
|
main thread, not in killer_thread2. */
|
|
ASSERT (sigint_occurred == 2);
|
|
|
|
/* Unblock SIGINT. */
|
|
ASSERT (pthread_sigmask (SIG_UNBLOCK, &set, NULL) == 0);
|
|
|
|
ASSERT (sigint_occurred == 2);
|
|
|
|
/* Clean up the threads. This avoids a "ThreadSanitizer: thread leak" warning
|
|
from "gcc -fsanitize=thread". */
|
|
ASSERT (pthread_join (killer_thread1, NULL) == 0);
|
|
ASSERT (pthread_join (killer_thread2, NULL) == 0);
|
|
|
|
return test_exit_status;
|
|
}
|
|
|
|
#else
|
|
|
|
int
|
|
main ()
|
|
{
|
|
fputs ("Skipping test: POSIX threads not enabled\n", stderr);
|
|
return 77;
|
|
}
|
|
|
|
#endif
|