/*
* Copyright (c) 2023 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
#include <sys/sysctl.h>
#include <sys/wait.h>
#include <darwintest.h>
#include <signal.h>
T_GLOBAL_META(
T_META_NAMESPACE("xnu.epoch_sync_tests"),
T_META_RADAR_COMPONENT_NAME("xnu"),
T_META_RADAR_COMPONENT_VERSION("scheduler"),
T_META_OWNER("mphalan"));
#define TEST_SYSCTL "debug.test.esync_test"
T_DECL(epoch_sync_test, "Test Epoch Sync",
T_META_REQUIRES_SYSCTL_EQ(TEST_SYSCTL, 0))
{
int64_t old = 0;
size_t old_len = sizeof(old);
int64_t new = 10;
size_t new_len = sizeof(new);
int rc = sysctlbyname(TEST_SYSCTL, &old, &old_len, &new, new_len);
T_QUIET; T_ASSERT_POSIX_SUCCESS(rc, "sysctlbyname(" TEST_SYSCTL ")");
}
#define TIMEOUT 10
static void
timeout(__unused int ignored)
{
T_ASSERT_FAIL("child didn't exit in time");
}
#define TEST_WAIT_SYSCTL "debug.test.esync_test_wait"
T_DECL(epoch_sync_test_wait, "Test Epoch Sync Wait",
T_META_REQUIRES_SYSCTL_EQ(TEST_WAIT_SYSCTL, 0))
{
int64_t old = 0;
size_t old_len = sizeof(old);
int64_t new = 10;
size_t new_len = sizeof(new);
pid_t pid = fork();
T_ASSERT_POSIX_SUCCESS(pid, "fork");
/* Have the child block in an abortable esync_wait call. */
if (pid == 0) {
int rc = sysctlbyname(TEST_WAIT_SYSCTL, &old, &old_len, &new, new_len);
/*
* The only way out of this syscall is if the process is killed.
* So nothing after this point should run.
*/
T_ASSERT_FAIL("Unexpectedly returned from sysctl (%d)", rc);
}
/* Give enough time for the child to block in esync_wait. */
sleep(1);
/* Kill the child. */
int ret = kill(pid, SIGKILL);
T_ASSERT_POSIX_SUCCESS(ret, "killing child");
/* Wait a maximum of TIMEOUT seconds for the child to exit. */
T_ASSERT_NE(signal(SIGALRM, timeout), SIG_ERR, NULL);
T_ASSERT_POSIX_SUCCESS(alarm(TIMEOUT), NULL);
int status = 0;
T_ASSERT_POSIX_SUCCESS(waitpid(pid, &status, 0), "waiting for child");
/* Check that the child was killed. */
T_ASSERT_TRUE(WIFSIGNALED(status), "exited due to signal");
T_ASSERT_EQ(WTERMSIG(status), SIGKILL, "killed with SIGKILL");
}