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/*
* Copyright (c) 2022, 2023, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/* @test
* @bug 8289610 8249627 8205132 8320532
* @summary Test that Thread stops throws UOE
* @run junit ThreadStopTest
*/
import java.time.Duration;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.locks.LockSupport;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;
class ThreadStopTest {
/**
* Test current thread calling Thread.stop on itself.
*/
@Test
void testCurrentThread() {
var thread = Thread.currentThread();
assertThrows(UnsupportedOperationException.class, thread::stop);
}
/**
* Test Thread.stop on an unstarted thread.
*/
@Test
void testUnstartedThread() {
Thread thread = new Thread(() -> { });
assertThrows(UnsupportedOperationException.class, thread::stop);
assertTrue(thread.getState() == Thread.State.NEW);
}
/**
* Test Thread.stop on a thread spinning in a loop.
*/
@Test
void testRunnableThread() throws Exception {
AtomicBoolean done = new AtomicBoolean();
Thread thread = new Thread(() -> {
while (!done.get()) {
Thread.onSpinWait();
}
});
thread.start();
try {
assertThrows(UnsupportedOperationException.class, thread::stop);
// thread should not terminate
boolean terminated = thread.join(Duration.ofMillis(500));
assertFalse(terminated);
} finally {
done.set(true);
thread.join();
}
}
/**
* Test Thread.stop on a thread that is parked.
*/
@Test
void testWaitingThread() throws Exception {
Thread thread = new Thread(LockSupport::park);
thread.start();
try {
// wait for thread to park
while ((thread.getState() != Thread.State.WAITING)) {
Thread.sleep(10);
}
assertThrows(UnsupportedOperationException.class, thread::stop);
assertTrue(thread.getState() == Thread.State.WAITING);
} finally {
LockSupport.unpark(thread);
thread.join();
}
}
/**
* Test Thread.stop on a terminated thread.
*/
@Test
void testTerminatedThread() throws Exception {
Thread thread = new Thread(() -> { });
thread.start();
thread.join();
assertThrows(UnsupportedOperationException.class, thread::stop);
assertTrue(thread.getState() == Thread.State.TERMINATED);
}
}
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