1 /*
   2  * Copyright (c) 2016, 2019, 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.testlibrary.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.testlibrary.jfr.EventNames;
  37 import jdk.testlibrary.jfr.Events;
  38 import jdk.testlibrary.thread.TestThread;
  39 import jdk.testlibrary.thread.XRun;
  40 
  41 /*
  42  * @test TestJavaMonitorInflateEvent
  43  * @key jfr
  44  * @library /lib/testlibrary
  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                 // unsupported cause in ajdk8
 105                 // Events.assertField(event, FIELD_CAUSE).notNull();
 106                 isAnyFound = true;
 107                 break;
 108             }
 109             assertTrue(isAnyFound, "Expected an inflation event from test");
 110         } catch (Throwable e) {
 111             recording.dump(Paths.get("failed.jfr"));
 112             throw e;
 113         } finally {
 114             recording.close();
 115         }
 116     }
 117 }