1 /*
   2  * Copyright (c) 2013, 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 java.util.List;
  29 
  30 import jdk.jfr.Recording;
  31 import jdk.jfr.consumer.RecordedClass;
  32 import jdk.jfr.consumer.RecordedEvent;
  33 import jdk.jfr.consumer.RecordedThread;
  34 import jdk.testlibrary.Asserts;
  35 import jdk.testlibrary.jfr.EventNames;
  36 import jdk.testlibrary.jfr.Events;
  37 
  38 /*
  39  * @test
  40  * @key jfr
  41  * @library /lib/testlibrary
  42  * @run main/othervm jdk.jfr.event.runtime.TestJavaMonitorWaitTimeOut
  43  */
  44 public class TestJavaMonitorWaitTimeOut {
  45 
  46     static final class Lock {
  47 
  48     }
  49 
  50     private static final String THREAD_NAME = "Notifier";
  51 
  52     static class Notifierhread extends Thread {
  53         private final Object lock;
  54 
  55         Notifierhread(Object lock) {
  56             super(THREAD_NAME);
  57             this.lock = lock;
  58         }
  59 
  60         public void run() {
  61             synchronized (lock) {
  62                 lock.notify();
  63             }
  64         }
  65     }
  66 
  67     public static void main(String[] args) throws Throwable {
  68         try (Recording recording = new Recording()) {
  69             recording.enable(EventNames.JavaMonitorWait).withoutThreshold().withoutStackTrace();
  70             recording.start();
  71             Lock lock = new Lock();
  72 
  73             synchronized (lock) {
  74                 // event without notifier, should be null
  75                 lock.wait(10);
  76             }
  77             Notifierhread s = new Notifierhread(lock);
  78 
  79             synchronized (lock) {
  80                 s.start();
  81                 // event with a notifier
  82                 lock.wait(1_000_000);
  83                 s.join();
  84             }
  85 
  86             synchronized (lock) {
  87                 // event without a notifier, should be null
  88                 lock.wait(11);
  89             }
  90             recording.stop();
  91             List<RecordedEvent> events = Events.fromRecording(recording);
  92             for (RecordedEvent e : events) {
  93                 if (isWaitEvent(e)) {
  94                     System.out.println(e);
  95                 }
  96             }
  97             assertTimeOutEvent(events, 10, null);
  98             assertTimeOutEvent(events, 1_000_000, THREAD_NAME);
  99             assertTimeOutEvent(events, 11, null);
 100         }
 101     }
 102 
 103     private static boolean isWaitEvent(RecordedEvent event) {
 104         RecordedClass t = event.getValue("monitorClass");
 105         return t != null && t.getName().equals(Lock.class.getName());
 106     }
 107 
 108     private static void assertTimeOutEvent(List<RecordedEvent> events, long timeout, String expectedThreadName) {
 109         for (RecordedEvent e : events) {
 110             if (isWaitEvent(e)) {
 111                 Long l = e.getValue("timeout");
 112                 if (l == timeout) {
 113                     RecordedThread notifier = e.getValue("notifier");
 114                     String threadName = null;
 115                     if (notifier != null) {
 116                         threadName = notifier.getJavaName();
 117                     }
 118                     Asserts.assertEquals(threadName, expectedThreadName, "Invalid thread");
 119                     return;
 120                 }
 121             }
 122         }
 123         Asserts.fail("Could not find event with monitorClass" + Lock.class.getName());
 124     }
 125 }