--- /dev/null 2019-02-07 20:54:51.336000000 +0300 +++ new/test/jdk/jfr/event/runtime/TestJavaBlockedEvent.java 2019-02-08 18:33:38.663979898 +0300 @@ -0,0 +1,119 @@ +/* + * 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 /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 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); + } +}