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124 lines
3.5 KiB
C
124 lines
3.5 KiB
C
/* Test that pthread_kill succeeds during thread exit.
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Copyright (C) 2021-2023 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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/* This test verifies that pthread_kill for a thread that is exiting
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succeeds (with or without actually delivering the signal). */
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#include <array_length.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include <support/xsignal.h>
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#include <support/xthread.h>
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#include <unistd.h>
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/* Set to true by timeout_thread_function when the test should
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terminate. */
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static bool timeout;
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static void *
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timeout_thread_function (void *unused)
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{
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usleep (1000 * 1000);
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__atomic_store_n (&timeout, true, __ATOMIC_RELAXED);
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return NULL;
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}
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/* Used to synchronize the sending threads with the target thread and
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main thread. */
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static pthread_barrier_t barrier_1;
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static pthread_barrier_t barrier_2;
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/* The target thread to which signals are to be sent. */
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static pthread_t target_thread;
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/* Set by the main thread to true after timeout has been set to
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true. */
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static bool exiting;
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static void *
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sender_thread_function (void *unused)
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{
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while (true)
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{
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/* Wait until target_thread has been initialized. The target
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thread and main thread participate in this barrier. */
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xpthread_barrier_wait (&barrier_1);
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if (exiting)
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break;
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xpthread_kill (target_thread, SIGUSR1);
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/* Communicate that the signal has been sent. The main thread
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participates in this barrier. */
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xpthread_barrier_wait (&barrier_2);
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}
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return NULL;
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}
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static void *
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target_thread_function (void *unused)
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{
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target_thread = pthread_self ();
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xpthread_barrier_wait (&barrier_1);
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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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xsignal (SIGUSR1, SIG_IGN);
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pthread_t thr_timeout = xpthread_create (NULL, timeout_thread_function, NULL);
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pthread_t threads[4];
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xpthread_barrier_init (&barrier_1, NULL, array_length (threads) + 2);
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xpthread_barrier_init (&barrier_2, NULL, array_length (threads) + 1);
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for (int i = 0; i < array_length (threads); ++i)
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threads[i] = xpthread_create (NULL, sender_thread_function, NULL);
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while (!__atomic_load_n (&timeout, __ATOMIC_RELAXED))
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{
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xpthread_create (NULL, target_thread_function, NULL);
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/* Wait for the target thread to be set up and signal sending to
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start. */
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xpthread_barrier_wait (&barrier_1);
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/* Wait for signal sending to complete. */
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xpthread_barrier_wait (&barrier_2);
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xpthread_join (target_thread);
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}
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exiting = true;
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/* Signal the sending threads to exit. */
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xpthread_create (NULL, target_thread_function, NULL);
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xpthread_barrier_wait (&barrier_1);
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for (int i = 0; i < array_length (threads); ++i)
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xpthread_join (threads[i]);
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xpthread_join (thr_timeout);
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return 0;
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}
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#include <support/test-driver.c>
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