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.gc == "Serial" | vm.gc == null

    42  * @library /test/lib /test/jdk

    43  * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:-UseFastUnorderedTimeStamps -XX:+UseSerialGC -XX:-UseCompressedOops -XX:MarkSweepDeadRatio=0 -XX:+IgnoreUnrecognizedVMOptions jdk.jfr.event.gc.objectcount.TestObjectCountEvent

    44  */

    45 public class TestObjectCountEvent {

    46     private static final String objectCountEventPath = EventNames.ObjectCount;

    47     private static final String heapSummaryEventPath = EventNames.GCHeapSummary;

    48 

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

    50         Recording recording = new Recording();

    51         recording.enable(objectCountEventPath);

    52         recording.enable(heapSummaryEventPath);

    53 

    54         ObjectCountEventVerifier.createTestData();

    55         System.gc();

    56         recording.start();

    57         recording.stop();

    58 

    59         List<RecordedEvent> events = Events.fromRecording(recording);

    60         for (RecordedEvent event : events) {

    61             System.out.println("Event: " + event);

    62         }

    63 

    64         Optional<RecordedEvent> heapSummaryEvent = events.stream()

    65                                 .filter(e -> Events.isEventType(e, heapSummaryEventPath))

    66                                 .filter(e -> "After GC".equals(Events.assertField(e, "when").getValue()))

    67                                 .findFirst();

    68         Asserts.assertTrue(heapSummaryEvent.isPresent(), "No heapSummary with cause='After GC'");

    69         System.out.println("Found heapSummaryEvent: " + heapSummaryEvent.get());

    70         Events.assertField(heapSummaryEvent.get(), "heapUsed").atLeast(0L).getValue();

    71         int gcId = Events.assertField(heapSummaryEvent.get(), "gcId").getValue();

    72 

    73         List<RecordedEvent> objCountEvents = events.stream()

    74                                 .filter(e -> Events.isEventType(e, objectCountEventPath))

    75                                 .filter(e -> isGcId(e, gcId))

    76                                 .collect(Collectors.toList());

    77         Asserts.assertFalse(objCountEvents.isEmpty(), "No objCountEvents for gcId=" + gcId);

    78         ObjectCountEventVerifier.verify(objCountEvents);

    79     }

    80 

    81     private static boolean isGcId(RecordedEvent event, int gcId) {

    82         return gcId == (int)Events.assertField(event, "gcId").getValue();

    83     }

    84 

    85 }