88 lines
2.6 KiB
C
88 lines
2.6 KiB
C
|
/* Test that pthread_cancel succeeds during thread exit.
|
||
|
|
Copyright (C) 2021-2022 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/>. */
|
||
|
|
|
||
|
|
/* This test tries to trigger an internal race condition in
|
||
|
|
pthread_cancel, where the cancellation signal is sent after the
|
||
|
|
thread has begun the cancellation process. This can result in a
|
||
|
|
spurious ESRCH error. For the original bug 12889, the window is
|
||
|
|
quite small, so the bug was not reproduced in every run. */
|
||
|
|
|
||
|
|
#include <stdbool.h>
|
||
|
|
#include <stddef.h>
|
||
|
|
#include <support/check.h>
|
||
|
|
#include <support/xthread.h>
|
||
|
|
#include <support/xunistd.h>
|
||
|
|
#include <sys/select.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
|
||
|
|
/* Set to true by timeout_thread_function when the test should
|
||
|
|
terminate. */
|
||
|
|
static bool timeout;
|
||
|
|
|
||
|
|
static void *
|
||
|
|
timeout_thread_function (void *unused)
|
||
|
|
{
|
||
|
|
usleep (5 * 1000 * 1000);
|
||
|
|
__atomic_store_n (&timeout, true, __ATOMIC_RELAXED);
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Used for blocking the select function below. */
|
||
|
|
static int pipe_fds[2];
|
||
|
|
|
||
|
|
static void *
|
||
|
|
canceled_thread_function (void *unused)
|
||
|
|
{
|
||
|
|
while (true)
|
||
|
|
{
|
||
|
|
fd_set rfs;
|
||
|
|
fd_set wfs;
|
||
|
|
fd_set efs;
|
||
|
|
FD_ZERO (&rfs);
|
||
|
|
FD_ZERO (&wfs);
|
||
|
|
FD_ZERO (&efs);
|
||
|
|
FD_SET (pipe_fds[0], &rfs);
|
||
|
|
|
||
|
|
/* If the cancellation request is recognized early, the thread
|
||
|
|
begins exiting while the cancellation signal arrives. */
|
||
|
|
select (FD_SETSIZE, &rfs, &wfs, &efs, NULL);
|
||
|
|
}
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int
|
||
|
|
do_test (void)
|
||
|
|
{
|
||
|
|
xpipe (pipe_fds);
|
||
|
|
pthread_t thr_timeout = xpthread_create (NULL, timeout_thread_function, NULL);
|
||
|
|
|
||
|
|
while (!__atomic_load_n (&timeout, __ATOMIC_RELAXED))
|
||
|
|
{
|
||
|
|
pthread_t thr = xpthread_create (NULL, canceled_thread_function, NULL);
|
||
|
|
xpthread_cancel (thr);
|
||
|
|
TEST_VERIFY (xpthread_join (thr) == PTHREAD_CANCELED);
|
||
|
|
}
|
||
|
|
|
||
|
|
xpthread_join (thr_timeout);
|
||
|
|
xclose (pipe_fds[0]);
|
||
|
|
xclose (pipe_fds[1]);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
#include <support/test-driver.c>
|