1 /* 2 * Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package jdk.jfr.event.runtime; 27 28 import static jdk.test.lib.Asserts.assertFalse; 29 import static jdk.test.lib.Asserts.assertTrue; 30 31 import java.time.Duration; 32 import java.util.List; 33 import java.util.concurrent.CountDownLatch; 34 import java.util.concurrent.locks.LockSupport; 35 36 import jdk.jfr.Recording; 37 import jdk.jfr.consumer.RecordedEvent; 38 import jdk.test.lib.jfr.EventNames; 39 import jdk.test.lib.jfr.Events; 40 import jdk.test.lib.management.ThreadMXBeanTool; 41 import jdk.test.lib.thread.TestThread; 42 43 44 /** 45 * @test 46 * @key jfr 47 * @requires vm.hasJFR 48 * @library /test/lib 49 * 50 * @run main/othervm jdk.jfr.event.runtime.TestThreadParkEvent 51 */ 52 53 public class TestThreadParkEvent { 54 private static final String EVENT_NAME = EventNames.ThreadPark; 55 private static final long THRESHOLD_MILLIS = 1; 56 57 static class Blocker { 58 } 59 60 public static void main(String[] args) throws Throwable { 61 final CountDownLatch stop = new CountDownLatch(1); 62 final Blocker blocker = new Blocker(); 63 TestThread parkThread = new TestThread(new Runnable() { 64 public void run() { 65 while (stop.getCount() > 0) { 66 LockSupport.park(blocker); 67 } 68 } 69 }); 70 71 Recording recording = new Recording(); 72 recording.enable(EVENT_NAME).withThreshold(Duration.ofMillis(THRESHOLD_MILLIS)); 73 try { 74 recording.start(); 75 parkThread.start(); 76 ThreadMXBeanTool.waitUntilBlockingOnObject(parkThread, Thread.State.WAITING, blocker); 77 // sleep so we know the event is recorded 78 Thread.sleep(2 * THRESHOLD_MILLIS); 79 } finally { 80 stop.countDown(); 81 LockSupport.unpark(parkThread); 82 parkThread.join(); 83 recording.stop(); 84 } 85 86 List<RecordedEvent> events = Events.fromRecording(recording); 87 Events.hasEvents(events); 88 boolean isAnyFound = false; 89 for (RecordedEvent event : events) { 90 System.out.println("Event:" + event); 91 String klassName = Events.assertField(event, "parkedClass.name").notNull().getValue(); 92 if (klassName.equals(blocker.getClass().getName().replace('.', '/'))) { 93 assertFalse(isAnyFound, "Found more than 1 event"); 94 isAnyFound = true; 95 Events.assertField(event, "timeout").equal(0L); 96 Events.assertField(event, "address").notEqual(0L); 97 Events.assertEventThread(event, parkThread); 98 } 99 } 100 assertTrue(isAnyFound, "Correct event not found"); 101 } 102 103 }