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  * @library /test/lib

    48  *

    49  * @run main/othervm jdk.jfr.event.runtime.TestThreadParkEvent

    50  */

    51 

    52 public class TestThreadParkEvent {

    53     private static final String EVENT_NAME = EventNames.ThreadPark;

    54     private static final long THRESHOLD_MILLIS = 1;

    55 

    56     static class Blocker {

    57     }

    58 

    59     public static void main(String[] args) throws Throwable {

    60         final CountDownLatch stop = new CountDownLatch(1);

    61         final Blocker blocker = new Blocker();

    62         TestThread parkThread = new TestThread(new Runnable() {

    63             public void run() {

    64                 while (stop.getCount() > 0) {

    65                     LockSupport.park(blocker);

    66                 }

    67             }

    68         });

    69 

    70         Recording recording = new Recording();

    71         recording.enable(EVENT_NAME).withThreshold(Duration.ofMillis(THRESHOLD_MILLIS));

    72         try {

    73             recording.start();

    74             parkThread.start();

    75             ThreadMXBeanTool.waitUntilBlockingOnObject(parkThread, Thread.State.WAITING, blocker);

    76             // sleep so we know the event is recorded

    77             Thread.sleep(2 * THRESHOLD_MILLIS);

    78         } finally {

    79             stop.countDown();

    80             LockSupport.unpark(parkThread);

    81             parkThread.join();

    82             recording.stop();

    83         }

    84 

    85         List<RecordedEvent> events = Events.fromRecording(recording);

    86         Events.hasEvents(events);

    87         boolean isAnyFound = false;

    88         for (RecordedEvent event : events) {

    89             System.out.println("Event:" + event);

    90             String klassName = Events.assertField(event, "parkedClass.name").notNull().getValue();

    91             if (klassName.equals(blocker.getClass().getName().replace('.', '/'))) {

    92                 assertFalse(isAnyFound, "Found more than 1 event");

    93                 isAnyFound = true;

    94                 Events.assertField(event, "timeout").equal(0L);

    95                 Events.assertField(event, "address").notEqual(0L);

    96                 Events.assertEventThread(event, parkThread);

    97             }

    98         }

    99         assertTrue(isAnyFound, "Correct event not found");

   100     }

   101 

   102 }