237 lines
8.9 KiB
Java
237 lines
8.9 KiB
Java
/*
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* Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 4967283 5080203 8022208
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* @summary Basic unit test of thread states returned by
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* ThreadMXBean.getThreadInfo.getThreadState().
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* It also tests lock information returned by ThreadInfo.
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* @author Mandy Chung
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*
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* @library ../../Thread
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* @library /lib/testlibrary
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* @library /test/lib
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*
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* @build jdk.testlibrary.*
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* @build ThreadMXBeanStateTest ThreadStateController
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* @run main ThreadMXBeanStateTest
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*/
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import java.lang.management.ManagementFactory;
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import java.lang.management.ThreadMXBean;
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import java.lang.management.ThreadInfo;
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import static java.lang.Thread.State.*;
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public class ThreadMXBeanStateTest {
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private static final ThreadMXBean tm = ManagementFactory.getThreadMXBean();
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static class Lock {
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private final String name;
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Lock(String name) {
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this.name = name;
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}
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@Override
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public String toString() {
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return name;
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}
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}
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private static final Lock globalLock = new Lock("my lock");
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public static void main(String[] argv) throws Exception {
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// Force thread state initialization now before the test
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// verification begins.
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Thread.currentThread().getState();
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ThreadStateController thread = new ThreadStateController("StateChanger", globalLock);
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thread.setDaemon(true);
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try {
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// before myThread starts
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thread.checkThreadState(NEW);
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thread.start();
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thread.transitionTo(RUNNABLE);
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thread.checkThreadState(RUNNABLE);
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checkLockInfo(thread, RUNNABLE, null, null);
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thread.suspend();
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ThreadStateController.pause(10);
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thread.checkThreadState(RUNNABLE);
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checkSuspendedThreadState(thread, RUNNABLE);
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thread.resume();
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synchronized (globalLock) {
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thread.transitionTo(BLOCKED);
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thread.checkThreadState(BLOCKED);
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checkLockInfo(thread, BLOCKED,
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globalLock, Thread.currentThread());
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}
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thread.transitionTo(WAITING);
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thread.checkThreadState(WAITING);
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checkLockInfo(thread, Thread.State.WAITING,
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globalLock, null);
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thread.transitionTo(TIMED_WAITING);
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thread.checkThreadState(TIMED_WAITING);
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checkLockInfo(thread, TIMED_WAITING,
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globalLock, null);
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thread.transitionToPark(true /* timed park */);
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thread.checkThreadState(TIMED_WAITING);
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checkLockInfo(thread, TIMED_WAITING, null, null);
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thread.transitionToPark(false /* indefinite park */);
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thread.checkThreadState(WAITING);
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checkLockInfo(thread, WAITING, null, null);
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thread.transitionToSleep();
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thread.checkThreadState(TIMED_WAITING);
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checkLockInfo(thread, TIMED_WAITING, null, null);
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thread.transitionTo(TERMINATED);
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thread.checkThreadState(TERMINATED);
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} finally {
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try {
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System.out.println(thread.getLog());
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} catch (InterruptedException e) {
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e.printStackTrace();
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System.out.println("TEST FAILED: Unexpected exception.");
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throw new RuntimeException(e);
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}
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}
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System.out.println("Test passed.");
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}
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private static void checkSuspendedThreadState(ThreadStateController t, Thread.State state) {
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ThreadInfo info = getThreadInfo(t, state);
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if (info == null) {
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throw new RuntimeException(t.getName() +
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" expected to have ThreadInfo " +
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" but got null.");
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}
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if (info.getThreadState() != state) {
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throw new RuntimeException(t.getName() + " expected to be in " +
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state + " state but got " + info.getThreadState());
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}
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if (!info.isSuspended()) {
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throw new RuntimeException(t.getName() + " expected to be suspended " +
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" but isSuspended() returns " + info.isSuspended());
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}
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}
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private static String getLockName(Object lock) {
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if (lock == null) return null;
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return lock.getClass().getName() + '@' +
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Integer.toHexString(System.identityHashCode(lock));
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}
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// maximum number of retries when checking for thread state.
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private static final int MAX_RETRY = 500;
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private static ThreadInfo getThreadInfo(ThreadStateController t, Thread.State expected) {
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// wait for the thread to transition to the expected state.
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// There is a small window between the thread checking the state
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// and the thread actual entering that state.
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int retryCount=0;
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ThreadInfo info = tm.getThreadInfo(t.getId());
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while (info.getThreadState() != expected && retryCount < MAX_RETRY) {
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ThreadStateController.pause(10);
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retryCount++;
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info = tm.getThreadInfo(t.getId());
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}
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return info;
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}
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private static void checkLockInfo(ThreadStateController t, Thread.State state,
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Object lock, Thread owner) {
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ThreadInfo info = getThreadInfo(t, state);
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if (info == null) {
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throw new RuntimeException(t.getName() +
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" expected to have ThreadInfo " +
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" but got null.");
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}
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if (info.getThreadState() != state) {
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throw new RuntimeException(t.getName() + " expected to be in " +
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state + " state but got " + info.getThreadState());
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}
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if (lock == null && info.getLockName() != null) {
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throw new RuntimeException(t.getName() +
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" expected not to be blocked on any lock" +
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" but got " + info.getLockName());
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}
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String expectedLockName = getLockName(lock);
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if (lock != null && info.getLockName() == null) {
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throw new RuntimeException(t.getName() +
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" expected to be blocked on lock [" + expectedLockName +
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"] but got null.");
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}
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if (lock != null && !expectedLockName.equals(info.getLockName())) {
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throw new RuntimeException(t.getName() +
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" expected to be blocked on lock [" + expectedLockName +
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"] but got [" + info.getLockName() + "].");
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}
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if (owner == null && info.getLockOwnerName() != null) {
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throw new RuntimeException("Lock owner is expected " +
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" to be null but got " + info.getLockOwnerName());
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}
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if (owner != null && info.getLockOwnerName() == null) {
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throw new RuntimeException("Lock owner is expected to be " +
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owner.getName() +
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" but got null.");
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}
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if (owner != null && !info.getLockOwnerName().equals(owner.getName())) {
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throw new RuntimeException("Lock owner is expected to be " +
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owner.getName() +
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" but got " + owner.getName());
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}
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if (owner == null && info.getLockOwnerId() != -1) {
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throw new RuntimeException("Lock owner is expected " +
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" to be -1 but got " + info.getLockOwnerId());
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}
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if (owner != null && info.getLockOwnerId() <= 0) {
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throw new RuntimeException("Lock owner is expected to be " +
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owner.getName() + "(id = " + owner.getId() +
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") but got " + info.getLockOwnerId());
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}
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if (owner != null && info.getLockOwnerId() != owner.getId()) {
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throw new RuntimeException("Lock owner is expected to be " +
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owner.getName() + "(id = " + owner.getId() +
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") but got " + info.getLockOwnerId());
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}
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if (info.isSuspended()) {
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throw new RuntimeException(t.getName() +
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" isSuspended() returns " + info.isSuspended());
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}
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}
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}
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