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.gc.objectcount;
  27 
  28 import java.util.List;
  29 import java.util.Optional;
  30 import java.util.stream.Collectors;
  31 
  32 import jdk.jfr.Recording;
  33 import jdk.jfr.consumer.RecordedEvent;
  34 import jdk.test.lib.Asserts;
  35 import jdk.test.lib.jfr.EventNames;
  36 import jdk.test.lib.jfr.Events;
  37 
  38 /**
  39  * @test
  40  * @key jfr
  41  * @requires vm.hasJFR
  42  * @requires vm.gc == "Serial" | vm.gc == null
  43  * @library /test/lib /test/jdk
  44  * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:-UseFastUnorderedTimeStamps -XX:+UseSerialGC -XX:-UseCompressedOops -XX:MarkSweepDeadRatio=0 -XX:+IgnoreUnrecognizedVMOptions jdk.jfr.event.gc.objectcount.TestObjectCountEvent
  45  */
  46 public class TestObjectCountEvent {
  47     private static final String objectCountEventPath = EventNames.ObjectCount;
  48     private static final String heapSummaryEventPath = EventNames.GCHeapSummary;
  49 
  50     public static void main(String[] args) throws Exception {
  51         Recording recording = new Recording();
  52         recording.enable(objectCountEventPath);
  53         recording.enable(heapSummaryEventPath);
  54 
  55         ObjectCountEventVerifier.createTestData();
  56         System.gc();
  57         recording.start();
  58         recording.stop();
  59 
  60         List<RecordedEvent> events = Events.fromRecording(recording);
  61         for (RecordedEvent event : events) {
  62             System.out.println("Event: " + event);
  63         }
  64 
  65         Optional<RecordedEvent> heapSummaryEvent = events.stream()
  66                                 .filter(e -> Events.isEventType(e, heapSummaryEventPath))
  67                                 .filter(e -> "After GC".equals(Events.assertField(e, "when").getValue()))
  68                                 .findFirst();
  69         Asserts.assertTrue(heapSummaryEvent.isPresent(), "No heapSummary with cause='After GC'");
  70         System.out.println("Found heapSummaryEvent: " + heapSummaryEvent.get());
  71         Events.assertField(heapSummaryEvent.get(), "heapUsed").atLeast(0L).getValue();
  72         int gcId = Events.assertField(heapSummaryEvent.get(), "gcId").getValue();
  73 
  74         List<RecordedEvent> objCountEvents = events.stream()
  75                                 .filter(e -> Events.isEventType(e, objectCountEventPath))
  76                                 .filter(e -> isGcId(e, gcId))
  77                                 .collect(Collectors.toList());
  78         Asserts.assertFalse(objCountEvents.isEmpty(), "No objCountEvents for gcId=" + gcId);
  79         ObjectCountEventVerifier.verify(objCountEvents);
  80     }
  81 
  82     private static boolean isGcId(RecordedEvent event, int gcId) {
  83         return gcId == (int)Events.assertField(event, "gcId").getValue();
  84     }
  85 
  86 }