jdk/test/java/lang/management/ThreadMXBean/ThreadMXBeanStateTest.java - platform/libcore - Git at Google

 /*
  * Copyright (c) 2003, 2015, 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     4967283 5080203 8022208
  * @summary Basic unit test of thread states returned by
  *          ThreadMXBean.getThreadInfo.getThreadState().
  *          It also tests lock information returned by ThreadInfo.
  * @author  Mandy Chung
  *
  * @library ../../Thread
  * @library /lib/testlibrary
  *
  * @build jdk.testlibrary.*
  * @build ThreadMXBeanStateTest ThreadStateController
  * @run main ThreadMXBeanStateTest
  */

 import java.lang.management.ManagementFactory;
 import java.lang.management.ThreadMXBean;
 import java.lang.management.ThreadInfo;
 import static java.lang.Thread.State.*;

 public class ThreadMXBeanStateTest {
     private static final ThreadMXBean tm = ManagementFactory.getThreadMXBean();

     static class Lock {
         private final String name;
         Lock(String name) {
             this.name = name;
         }
         @Override
         public String toString() {
             return name;
         }
     }

     private static final Lock globalLock = new Lock("my lock");

     public static void main(String[] argv) throws Exception {
         // Force thread state initialization now before the test
         // verification begins.
         Thread.currentThread().getState();
         ThreadStateController thread = new ThreadStateController("StateChanger", globalLock);
         thread.setDaemon(true);
         try {
             // before myThread starts
             thread.checkThreadState(NEW);

             thread.start();
             thread.transitionTo(RUNNABLE);
             thread.checkThreadState(RUNNABLE);
             checkLockInfo(thread, RUNNABLE, null, null);

             thread.suspend();
             ThreadStateController.pause(10);
             thread.checkThreadState(RUNNABLE);
             checkSuspendedThreadState(thread, RUNNABLE);
             thread.resume();

             synchronized (globalLock) {
                 thread.transitionTo(BLOCKED);
                 thread.checkThreadState(BLOCKED);
                 checkLockInfo(thread, BLOCKED,
                               globalLock, Thread.currentThread());
             }

             thread.transitionTo(WAITING);
             thread.checkThreadState(WAITING);
             checkLockInfo(thread, Thread.State.WAITING,
                           globalLock, null);

             thread.transitionTo(TIMED_WAITING);
             thread.checkThreadState(TIMED_WAITING);
             checkLockInfo(thread, TIMED_WAITING,
                           globalLock, null);


             thread.transitionToPark(true /* timed park */);
             thread.checkThreadState(TIMED_WAITING);
             checkLockInfo(thread, TIMED_WAITING, null, null);

             thread.transitionToPark(false /* indefinite park */);
             thread.checkThreadState(WAITING);
             checkLockInfo(thread, WAITING, null, null);

             thread.transitionToSleep();
             thread.checkThreadState(TIMED_WAITING);
             checkLockInfo(thread, TIMED_WAITING, null, null);

             thread.transitionTo(TERMINATED);
             thread.checkThreadState(TERMINATED);
         } finally {
             try {
                 System.out.println(thread.getLog());
             } catch (InterruptedException e) {
                 e.printStackTrace();
                 System.out.println("TEST FAILED: Unexpected exception.");
                 throw new RuntimeException(e);
             }
         }
         System.out.println("Test passed.");
     }

     private static void checkSuspendedThreadState(ThreadStateController t, Thread.State state) {
         ThreadInfo info = getThreadInfo(t, state);
         if (info == null) {
             throw new RuntimeException(t.getName() +
                " expected to have ThreadInfo " +
                " but got null.");
         }

         if (info.getThreadState() != state) {
             throw new RuntimeException(t.getName() + " expected to be in " +
                 state + " state but got " + info.getThreadState());
         }

         if (!info.isSuspended()) {
             throw new RuntimeException(t.getName() + " expected to be suspended " +
                 " but isSuspended() returns " + info.isSuspended());
         }
     }

     private static String getLockName(Object lock) {
         if (lock == null) return null;

         return lock.getClass().getName() + '@' +
             Integer.toHexString(System.identityHashCode(lock));
     }

     // maximum number of retries when checking for thread state.
     private static final int MAX_RETRY = 500;
     private static ThreadInfo getThreadInfo(ThreadStateController t, Thread.State expected) {
         // wait for the thread to transition to the expected state.
         // There is a small window between the thread checking the state
         // and the thread actual entering that state.
         int retryCount=0;
         ThreadInfo info = tm.getThreadInfo(t.getId());
         while (info.getThreadState() != expected && retryCount < MAX_RETRY) {
             ThreadStateController.pause(10);
             retryCount++;
             info = tm.getThreadInfo(t.getId());
         }
         return info;
     }

     private static void checkLockInfo(ThreadStateController t, Thread.State state,
                                       Object lock, Thread owner) {
         ThreadInfo info = getThreadInfo(t, state);
         if (info == null) {
             throw new RuntimeException(t.getName() +
                " expected to have ThreadInfo " +
                " but got null.");
         }

         if (info.getThreadState() != state) {
             throw new RuntimeException(t.getName() + " expected to be in " +
                 state + " state but got " + info.getThreadState());
         }

         if (lock == null && info.getLockName() != null) {
             throw new RuntimeException(t.getName() +
                 " expected not to be blocked on any lock" +
                 " but got " + info.getLockName());
         }
         String expectedLockName = getLockName(lock);
         if (lock != null && info.getLockName() == null) {
             throw new RuntimeException(t.getName() +
                 " expected to be blocked on lock [" + expectedLockName +
                 "] but got null.");
         }

         if (lock != null && !expectedLockName.equals(info.getLockName())) {
             throw new RuntimeException(t.getName() +
                 " expected to be blocked on lock [" + expectedLockName +
                 "] but got [" + info.getLockName() + "].");
         }

         if (owner == null && info.getLockOwnerName() != null) {
             throw new RuntimeException("Lock owner is expected " +
                 " to be null but got " + info.getLockOwnerName());
         }

         if (owner != null && info.getLockOwnerName() == null) {
             throw new RuntimeException("Lock owner is expected to be " +
                 owner.getName() +
                 " but got null.");
         }
         if (owner != null && !info.getLockOwnerName().equals(owner.getName())) {
             throw new RuntimeException("Lock owner is expected to be " +
                 owner.getName() +
                 " but got " + owner.getName());
         }
         if (owner == null && info.getLockOwnerId() != -1) {
             throw new RuntimeException("Lock owner is expected " +
                 " to be -1 but got " + info.getLockOwnerId());
         }

         if (owner != null && info.getLockOwnerId() <= 0) {
             throw new RuntimeException("Lock owner is expected to be " +
                 owner.getName() + "(id = " + owner.getId() +
                 ") but got " + info.getLockOwnerId());
         }
         if (owner != null && info.getLockOwnerId() != owner.getId()) {
             throw new RuntimeException("Lock owner is expected to be " +
                 owner.getName() + "(id = " + owner.getId() +
                 ") but got " + info.getLockOwnerId());
         }
         if (info.isSuspended()) {
             throw new RuntimeException(t.getName() +
                 " isSuspended() returns " + info.isSuspended());
         }
     }
 }
	/*
	* Copyright (c) 2003, 2015, 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 4967283 5080203 8022208
	* @summary Basic unit test of thread states returned by
	* ThreadMXBean.getThreadInfo.getThreadState().
	* It also tests lock information returned by ThreadInfo.
	* @author Mandy Chung
	*
	* @library ../../Thread
	* @library /lib/testlibrary
	*
	* @build jdk.testlibrary.*
	* @build ThreadMXBeanStateTest ThreadStateController
	* @run main ThreadMXBeanStateTest
	*/

	import java.lang.management.ManagementFactory;
	import java.lang.management.ThreadMXBean;
	import java.lang.management.ThreadInfo;
	import static java.lang.Thread.State.*;

	public class ThreadMXBeanStateTest {
	private static final ThreadMXBean tm = ManagementFactory.getThreadMXBean();

	static class Lock {
	private final String name;
	Lock(String name) {
	this.name = name;
	}
	@Override
	public String toString() {
	return name;
	}
	}

	private static final Lock globalLock = new Lock("my lock");

	public static void main(String[] argv) throws Exception {
	// Force thread state initialization now before the test
	// verification begins.
	Thread.currentThread().getState();
	ThreadStateController thread = new ThreadStateController("StateChanger", globalLock);
	thread.setDaemon(true);
	try {
	// before myThread starts
	thread.checkThreadState(NEW);

	thread.start();
	thread.transitionTo(RUNNABLE);
	thread.checkThreadState(RUNNABLE);
	checkLockInfo(thread, RUNNABLE, null, null);

	thread.suspend();
	ThreadStateController.pause(10);
	thread.checkThreadState(RUNNABLE);
	checkSuspendedThreadState(thread, RUNNABLE);
	thread.resume();

	synchronized (globalLock) {
	thread.transitionTo(BLOCKED);
	thread.checkThreadState(BLOCKED);
	checkLockInfo(thread, BLOCKED,
	globalLock, Thread.currentThread());
	}

	thread.transitionTo(WAITING);
	thread.checkThreadState(WAITING);
	checkLockInfo(thread, Thread.State.WAITING,
	globalLock, null);

	thread.transitionTo(TIMED_WAITING);
	thread.checkThreadState(TIMED_WAITING);
	checkLockInfo(thread, TIMED_WAITING,
	globalLock, null);


	thread.transitionToPark(true /* timed park */);
	thread.checkThreadState(TIMED_WAITING);
	checkLockInfo(thread, TIMED_WAITING, null, null);

	thread.transitionToPark(false /* indefinite park */);
	thread.checkThreadState(WAITING);
	checkLockInfo(thread, WAITING, null, null);

	thread.transitionToSleep();
	thread.checkThreadState(TIMED_WAITING);
	checkLockInfo(thread, TIMED_WAITING, null, null);

	thread.transitionTo(TERMINATED);
	thread.checkThreadState(TERMINATED);
	} finally {
	try {
	System.out.println(thread.getLog());
	} catch (InterruptedException e) {
	e.printStackTrace();
	System.out.println("TEST FAILED: Unexpected exception.");
	throw new RuntimeException(e);
	}
	}
	System.out.println("Test passed.");
	}

	private static void checkSuspendedThreadState(ThreadStateController t, Thread.State state) {
	ThreadInfo info = getThreadInfo(t, state);
	if (info == null) {
	throw new RuntimeException(t.getName() +
	" expected to have ThreadInfo " +
	" but got null.");
	}

	if (info.getThreadState() != state) {
	throw new RuntimeException(t.getName() + " expected to be in " +
	state + " state but got " + info.getThreadState());
	}

	if (!info.isSuspended()) {
	throw new RuntimeException(t.getName() + " expected to be suspended " +
	" but isSuspended() returns " + info.isSuspended());
	}
	}

	private static String getLockName(Object lock) {
	if (lock == null) return null;

	return lock.getClass().getName() + '@' +
	Integer.toHexString(System.identityHashCode(lock));
	}

	// maximum number of retries when checking for thread state.
	private static final int MAX_RETRY = 500;
	private static ThreadInfo getThreadInfo(ThreadStateController t, Thread.State expected) {
	// wait for the thread to transition to the expected state.
	// There is a small window between the thread checking the state
	// and the thread actual entering that state.
	int retryCount=0;
	ThreadInfo info = tm.getThreadInfo(t.getId());
	while (info.getThreadState() != expected && retryCount < MAX_RETRY) {
	ThreadStateController.pause(10);
	retryCount++;
	info = tm.getThreadInfo(t.getId());
	}
	return info;
	}

	private static void checkLockInfo(ThreadStateController t, Thread.State state,
	Object lock, Thread owner) {
	ThreadInfo info = getThreadInfo(t, state);
	if (info == null) {
	throw new RuntimeException(t.getName() +
	" expected to have ThreadInfo " +
	" but got null.");
	}

	if (info.getThreadState() != state) {
	throw new RuntimeException(t.getName() + " expected to be in " +
	state + " state but got " + info.getThreadState());
	}

	if (lock == null && info.getLockName() != null) {
	throw new RuntimeException(t.getName() +
	" expected not to be blocked on any lock" +
	" but got " + info.getLockName());
	}
	String expectedLockName = getLockName(lock);
	if (lock != null && info.getLockName() == null) {
	throw new RuntimeException(t.getName() +
	" expected to be blocked on lock [" + expectedLockName +
	"] but got null.");
	}

	if (lock != null && !expectedLockName.equals(info.getLockName())) {
	throw new RuntimeException(t.getName() +
	" expected to be blocked on lock [" + expectedLockName +
	"] but got [" + info.getLockName() + "].");
	}

	if (owner == null && info.getLockOwnerName() != null) {
	throw new RuntimeException("Lock owner is expected " +
	" to be null but got " + info.getLockOwnerName());
	}

	if (owner != null && info.getLockOwnerName() == null) {
	throw new RuntimeException("Lock owner is expected to be " +
	owner.getName() +
	" but got null.");
	}
	if (owner != null && !info.getLockOwnerName().equals(owner.getName())) {
	throw new RuntimeException("Lock owner is expected to be " +
	owner.getName() +
	" but got " + owner.getName());
	}
	if (owner == null && info.getLockOwnerId() != -1) {
	throw new RuntimeException("Lock owner is expected " +
	" to be -1 but got " + info.getLockOwnerId());
	}

	if (owner != null && info.getLockOwnerId() <= 0) {
	throw new RuntimeException("Lock owner is expected to be " +
	owner.getName() + "(id = " + owner.getId() +
	") but got " + info.getLockOwnerId());
	}
	if (owner != null && info.getLockOwnerId() != owner.getId()) {
	throw new RuntimeException("Lock owner is expected to be " +
	owner.getName() + "(id = " + owner.getId() +
	") but got " + info.getLockOwnerId());
	}
	if (info.isSuspended()) {
	throw new RuntimeException(t.getName() +
	" isSuspended() returns " + info.isSuspended());
	}
	}
	}