1 /*
   2  * Copyright (c) 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.oldobject;
  27 
  28 import java.util.ArrayList;
  29 import java.util.List;
  30 
  31 import jdk.jfr.Event;
  32 import jdk.jfr.Recording;
  33 import jdk.jfr.consumer.RecordedClass;
  34 import jdk.jfr.consumer.RecordedEvent;
  35 import jdk.jfr.consumer.RecordedObject;
  36 import jdk.jfr.internal.test.WhiteBox;
  37 import jdk.test.lib.jfr.EventNames;
  38 import jdk.test.lib.jfr.Events;
  39 
  40 /*
  41  * @test
  42  * @key jfr
  43  * @requires vm.gc == "null"
  44  * @library /test/lib /test/jdk
  45  * @modules jdk.jfr/jdk.jfr.internal.test
  46  * @run main/othervm  -XX:TLABSize=2k -XX:-FastTLABRefill jdk.jfr.event.oldobject.TestAllocationTime
  47  */
  48 public class TestAllocationTime {
  49 
  50     private static class BeforeLeakEvent extends Event {
  51     }
  52     private static class AfterLeakEvent extends Event {
  53     }
  54     private static class Leak {
  55     }
  56 
  57     public static List<Leak[]> leak = new ArrayList<>(OldObjects.MIN_SIZE);
  58 
  59     public static void main(String[] args) throws Exception {
  60         WhiteBox.setWriteAllObjectSamples(true);
  61 
  62         while(true) {
  63             try (Recording recording = new Recording()) {
  64                 leak.clear();
  65                 recording.enable(EventNames.OldObjectSample).withStackTrace().with("cutoff", "1 h");
  66                 recording.start();
  67 
  68                 BeforeLeakEvent be = new BeforeLeakEvent();
  69                 be.commit();
  70 
  71                 // Allocate array to trigger sampling code path for interpreter / c1
  72                 for (int i = 0; i < OldObjects.MIN_SIZE; i++) {
  73                     leak.add(new Leak[0]);
  74                 }
  75 
  76                 AfterLeakEvent ae = new AfterLeakEvent();
  77                 ae.commit();
  78 
  79                 recording.stop();
  80 
  81                 List<RecordedEvent> events = Events.fromRecording(recording);
  82                 Events.hasEvents(events);
  83                 RecordedObject sample = findLeak(events, BeforeLeakEvent.class.getName());
  84                 if (sample != null)  {
  85                     long beforeTime = find(events, BeforeLeakEvent.class.getName()).getValue("startTime");
  86                     long allocationTime = sample.getValue("allocationTime");
  87                     long afterTime = find(events, AfterLeakEvent.class.getName()).getValue("startTime");
  88                     System.out.println("Before time     : " + beforeTime);
  89                     System.out.println("Allocation time : " + allocationTime);
  90                     System.out.println("After time      : " + afterTime);
  91 
  92                     if (allocationTime < beforeTime) {
  93                         throw new Exception("Allocation should not happen this early");
  94                     }
  95                     if (allocationTime > afterTime) {
  96                         throw new Exception("Allocation should not happen this late");
  97                     }
  98                     return; // sample ok
  99                 }
 100             }
 101         }
 102     }
 103 
 104     private static RecordedObject findLeak(List<RecordedEvent> events, String name) throws Exception {
 105         for (RecordedEvent e : events) {
 106             if (e.getEventType().getName().equals(EventNames.OldObjectSample)) {
 107                 RecordedObject object = e.getValue("object");
 108                 RecordedClass rc = object.getValue("type");
 109                 if (rc.getName().equals(Leak[].class.getName())) {
 110                     return e;
 111                 }
 112             }
 113         }
 114         return null;
 115     }
 116 
 117     private static RecordedEvent find(List<RecordedEvent> events, String name) throws Exception {
 118         for (RecordedEvent e : events) {
 119             if (e.getEventType().getName().equals(name)) {
 120                 return e;
 121             }
 122         }
 123         throw new Exception("Could not find event with name " + name);
 124     }
 125 }