| /* |
| * Copyright (c) 2013, 2018, 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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. |
| */ |
| |
| package jdk.jfr.event.runtime; |
| |
| import static jdk.test.lib.Asserts.assertFalse; |
| import static jdk.test.lib.Asserts.assertTrue; |
| |
| import java.time.Duration; |
| import java.util.List; |
| import java.util.concurrent.CountDownLatch; |
| |
| import jdk.jfr.Recording; |
| import jdk.jfr.consumer.RecordedEvent; |
| import jdk.test.lib.jfr.EventNames; |
| import jdk.test.lib.jfr.Events; |
| import jdk.test.lib.management.ThreadMXBeanTool; |
| import jdk.test.lib.thread.TestThread; |
| import jdk.test.lib.thread.XRun; |
| |
| /* |
| * @test |
| * @key jfr |
| * @library /test/lib |
| * |
| * @run main/othervm jdk.jfr.event.runtime.TestJavaBlockedEvent |
| */ |
| public class TestJavaBlockedEvent { |
| private static final String EVENT_NAME = EventNames.JavaMonitorEnter; |
| private static final long THRESHOLD_MILLIS = 1; |
| |
| static class Lock { |
| } |
| |
| public static void main(String[] args) throws Throwable { |
| Recording recording = new Recording(); |
| |
| recording.enable(EVENT_NAME).withThreshold(Duration.ofMillis(THRESHOLD_MILLIS)); |
| recording.start(); |
| final Lock lock = new Lock(); |
| final CountDownLatch blockerInLock = new CountDownLatch(1); |
| final CountDownLatch blockingFinished = new CountDownLatch(1); |
| final CountDownLatch blockedFinished = new CountDownLatch(1); |
| TestThread blockerThread = new TestThread(new XRun() { |
| @Override |
| public void xrun() throws Throwable { |
| synchronized (lock) { |
| blockerInLock.countDown(); |
| blockingFinished.await(); |
| } |
| blockedFinished.await(); |
| } |
| }); |
| |
| TestThread blockedThread = new TestThread(new XRun() { |
| @Override |
| public void xrun() throws Throwable { |
| blockerInLock.await(); |
| synchronized (lock) { |
| blockedFinished.countDown(); |
| } |
| } |
| }); |
| blockerThread.start(); |
| blockedThread.start(); |
| |
| blockerInLock.await(); |
| ThreadMXBeanTool.waitUntilBlockingOnObject(blockedThread, Thread.State.BLOCKED, lock); |
| Thread.sleep(2 * THRESHOLD_MILLIS); |
| blockingFinished.countDown(); |
| blockedFinished.await(); |
| |
| blockedThread.join(); |
| blockerThread.join(); |
| recording.stop(); |
| |
| List<RecordedEvent> events = Events.fromRecording(recording); |
| boolean isAnyFound = false; |
| for (RecordedEvent event : events) { |
| System.out.println("Event:" + event); |
| if (event.getThread().getJavaThreadId() == blockedThread.getId()) { |
| if (isMyLock(Events.assertField(event, "monitorClass.name").getValue())) { |
| Events.assertEventThread(event, "previousOwner", blockerThread); |
| Events.assertField(event, "address").above(0L); |
| assertFalse(isAnyFound, "Found multiple events"); |
| isAnyFound = true; |
| } |
| } |
| } |
| assertTrue(isAnyFound, "No blocking event from " + blockedThread.getName()); |
| } |
| |
| private static boolean isMyLock(String className) { |
| return Lock.class.getName().replace('.', '/').equals(className); |
| } |
| } |