1 /* 2 * Copyright (c) 2018, 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.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.testlibrary.jfr.EventNames; 35 import jdk.testlibrary.jfr.Events; 36 import jdk.testlibrary.jfr.OldObjects; 37 38 /* 39 * @test 40 * @key jfr 41 * @requires vm.gc == "null" 42 * @library /lib/testlibrary 43 * @modules jdk.jfr/jdk.jfr.internal.test 44 * @run main/othervm -XX:TLABSize=2k jdk.jfr.event.oldobject.TestListenerLeak 45 */ 46 public class TestListenerLeak { 47 48 private interface TestListener { 49 void onListen(); 50 } 51 52 static class Stuff { 53 } 54 55 static class ListenerThread extends Thread { 56 57 private List<Stuff[]> stuff; 58 59 public ListenerThread(List<Stuff[]> stuff) { 60 this.stuff = stuff; 61 } 62 63 public void run() { 64 listener.add(new TestListener() { 65 @Override 66 public void onListen() { 67 System.out.println(stuff); 68 } 69 }); 70 } 71 } 72 73 private static List<TestListener> listener = new ArrayList<>(); 74 75 public static void main(String[] args) throws Exception { 76 WhiteBox.setWriteAllObjectSamples(true); 77 78 try (Recording r = new Recording()) { 79 r.enable(EventNames.OldObjectSample).withStackTrace().with("cutoff", "infinity"); 80 r.start(); 81 listenerLeak(); 82 r.stop(); 83 List<RecordedEvent> events = Events.fromRecording(r); 84 System.out.println("Event: " + events.size()); 85 for (RecordedEvent event : events) { 86 System.out.println("Event: " + event); 87 } 88 if (OldObjects.countMatchingEvents(events, Stuff[].class, null, null, -1, "listenerLeak") == 0) { 89 throw new Exception("Could not find leak with " + Stuff[].class); 90 } 91 } 92 } 93 94 private static void listenerLeak() throws InterruptedException { 95 List<Stuff[]> stuff = new ArrayList<>(OldObjects.MIN_SIZE); 96 for (int i = 0; i < OldObjects.MIN_SIZE; i++) { 97 // Allocate array to trigger sampling code path for interpreter / c1 98 stuff.add(new Stuff[0]); 99 } 100 101 ListenerThread t = new ListenerThread(stuff); 102 t.start(); 103 t.join(); 104 } 105 106 }