1 /*

     2  * Copyright (c) 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.oldobject;

    27 

    28 import java.time.Duration;

    29 import java.util.ArrayList;

    30 import java.util.List;

    31 

    32 import jdk.jfr.Recording;

    33 import jdk.jfr.consumer.RecordedEvent;

    34 import jdk.jfr.internal.test.WhiteBox;

    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 == "null"

    43  * @library /test/lib /test/jdk

    44  * @modules jdk.jfr/jdk.jfr.internal.test

    45  * @run main/othervm -XX:TLABSize=2k jdk.jfr.event.oldobject.TestObjectAge

    46  */

    47 public class TestObjectAge {

    48 

    49     public final static List<Object[]> leak = new ArrayList<>(OldObjects.MIN_SIZE);

    50 

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

    52         WhiteBox.setWriteAllObjectSamples(true);

    53 

    54         try (Recording recording = new Recording()) {

    55             recording.enable(EventNames.OldObjectSample).withStackTrace().with("cutoff", "1 h");

    56             recording.start();

    57 

    58             // Allocate array to trigger sampling code path for interpreter / c1

    59             for (int i = 0; i < OldObjects.MIN_SIZE; i++) {

    60                 leak.add(new Object[0]);

    61             }

    62             recording.stop();

    63 

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

    65             // OK if we sometimes don't get an event

    66             for (RecordedEvent event : events) {

    67                 Duration objectAge = event.getDuration("objectAge");

    68                 // Sanity check

    69                 if (objectAge.isNegative() || objectAge.toMinutes() > 60) {

    70                     throw new Exception("Object age " + objectAge + " is not reasonable");

    71                 }

    72             }

    73         }

    74     }

    75 }