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.Recording;

    32 import jdk.jfr.consumer.RecordedEvent;

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

    34 import jdk.test.lib.jfr.EventNames;

    35 import jdk.test.lib.jfr.Events;

    36 

    37 /*

    38  * @test

    39  * @key jfr

    40  * @requires vm.gc == "null"

    41  * @library /test/lib /test/jdk

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

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

    44  */

    45 public class TestListenerLeak {

    46 

    47     private interface TestListener {

    48         void onListen();

    49     }

    50 

    51     static class Stuff {

    52     }

    53 

    54     static class ListenerThread extends Thread {

    55 

    56         private List<Stuff[]> stuff;

    57 

    58         public ListenerThread(List<Stuff[]> stuff) {

    59             this.stuff = stuff;

    60         }

    61 

    62         public void run() {

    63             listener.add(new TestListener() {

    64                 @Override

    65                 public void onListen() {

    66                     System.out.println(stuff);

    67                 }

    68             });

    69         }

    70     }

    71 

    72     private static List<TestListener> listener = new ArrayList<>();

    73 

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

    75         WhiteBox.setWriteAllObjectSamples(true);

    76 

    77         try (Recording r = new Recording()) {

    78             r.enable(EventNames.OldObjectSample).withStackTrace().with("cutoff", "infinity");

    79             r.start();

    80             listenerLeak();

    81             r.stop();

    82             List<RecordedEvent> events = Events.fromRecording(r);

    83             if (OldObjects.countMatchingEvents(events, Stuff[].class, null, null, -1, "listenerLeak") == 0) {

    84                 throw new Exception("Could not find leak with " + Stuff[].class);

    85             }

    86         }

    87     }

    88 

    89     private static void listenerLeak() throws InterruptedException {

    90         List<Stuff[]> stuff = new ArrayList<>(OldObjects.MIN_SIZE);

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

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

    93             stuff.add(new Stuff[0]);

    94         }

    95 

    96         ListenerThread t = new ListenerThread(stuff);

    97         t.start();

    98         t.join();

    99     }

   100 

   101 }