1 /*

     2  * Copyright (c) 2016, 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.assertTrue;

    29 

    30 import java.nio.file.Paths;

    31 import java.time.Duration;

    32 import java.util.concurrent.CountDownLatch;

    33 

    34 import jdk.jfr.Recording;

    35 import jdk.jfr.consumer.RecordedEvent;

    36 import jdk.test.lib.jfr.EventNames;

    37 import jdk.test.lib.jfr.Events;

    38 import jdk.test.lib.thread.TestThread;

    39 import jdk.test.lib.thread.XRun;

    40 

    41 /*

    42  * @test TestJavaMonitorInflateEvent

    43  * @key jfr

    44  * @library /test/lib

    45  * @run main/othervm jdk.jfr.event.runtime.TestJavaMonitorInflateEvent

    46  */

    47 public class TestJavaMonitorInflateEvent {

    48 

    49     private static final String FIELD_KLASS_NAME = "monitorClass.name";

    50     private static final String FIELD_ADDRESS    = "address";

    51     private static final String FIELD_CAUSE      = "cause";

    52 

    53     private static final String EVENT_NAME = EventNames.JavaMonitorInflate;

    54     private static final long WAIT_TIME = 123456;

    55 

    56     static class Lock {

    57     }

    58 

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

    60         Recording recording = new Recording();

    61         recording.enable(EVENT_NAME).withThreshold(Duration.ofMillis(0));

    62         final Lock lock = new Lock();

    63         final CountDownLatch latch = new CountDownLatch(1);

    64         // create a thread that waits

    65         TestThread waitThread = new TestThread(new XRun() {

    66             @Override

    67             public void xrun() throws Throwable {

    68                 synchronized (lock) {

    69                     latch.countDown();

    70                     lock.wait(WAIT_TIME);

    71                 }

    72             }

    73         });

    74         try {

    75             recording.start();

    76             waitThread.start();

    77             latch.await();

    78             synchronized (lock) {

    79                 lock.notifyAll();

    80             }

    81         } finally {

    82             waitThread.join();

    83             recording.stop();

    84         }

    85         final String thisThreadName = Thread.currentThread().getName();

    86         final String waitThreadName = waitThread.getName();

    87         final String lockClassName = lock.getClass().getName().replace('.', '/');

    88         boolean isAnyFound = false;

    89         try {

    90             // Find at least one event with the correct monitor class and check the other fields

    91             for (RecordedEvent event : Events.fromRecording(recording)) {

    92                 assertTrue(EVENT_NAME.equals(event.getEventType().getName()), "mismatched event types?");

    93                 // Check recorded inflation event is associated with the Lock class used in the test

    94                 final String recordedMonitorClassName = Events.assertField(event, FIELD_KLASS_NAME).getValue();

    95                 if (!lockClassName.equals(recordedMonitorClassName)) {

    96                     continue;

    97                 }

    98                 // Check recorded thread matches one of the threads in the test

    99                 final String recordedThreadName = event.getThread().getJavaName();

   100                 if (!(recordedThreadName.equals(waitThreadName) || recordedThreadName.equals(thisThreadName))) {

   101                     continue;

   102                 }

   103                 Events.assertField(event, FIELD_ADDRESS).notEqual(0L);

   104                 Events.assertField(event, FIELD_CAUSE).notNull();

   105                 isAnyFound = true;

   106                 break;

   107             }

   108             assertTrue(isAnyFound, "Expected an inflation event from test");

   109         } catch (Throwable e) {

   110             recording.dump(Paths.get("failed.jfr"));

   111             throw e;

   112         } finally {

   113             recording.close();

   114         }

   115     }

   116 }