--- /dev/null 2018-06-17 23:18:20.806999507 +0800 +++ new/test/jdk/jfr/event/oldobject/TestListenerLeak.java 2019-01-29 11:04:10.589650129 +0800 @@ -0,0 +1,106 @@ +/* + * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +package jdk.jfr.event.oldobject; + +import java.util.ArrayList; +import java.util.List; + +import jdk.jfr.Recording; +import jdk.jfr.consumer.RecordedEvent; +import jdk.jfr.internal.test.WhiteBox; +import jdk.testlibrary.jfr.EventNames; +import jdk.testlibrary.jfr.Events; +import jdk.testlibrary.jfr.OldObjects; + +/* + * @test + * @key jfr + * @requires vm.gc == "null" + * @library /lib/testlibrary + * @modules jdk.jfr/jdk.jfr.internal.test + * @run main/othervm -XX:TLABSize=2k jdk.jfr.event.oldobject.TestListenerLeak + */ +public class TestListenerLeak { + + private interface TestListener { + void onListen(); + } + + static class Stuff { + } + + static class ListenerThread extends Thread { + + private List stuff; + + public ListenerThread(List stuff) { + this.stuff = stuff; + } + + public void run() { + listener.add(new TestListener() { + @Override + public void onListen() { + System.out.println(stuff); + } + }); + } + } + + private static List listener = new ArrayList<>(); + + public static void main(String[] args) throws Exception { + WhiteBox.setWriteAllObjectSamples(true); + + try (Recording r = new Recording()) { + r.enable(EventNames.OldObjectSample).withStackTrace().with("cutoff", "infinity"); + r.start(); + listenerLeak(); + r.stop(); + List events = Events.fromRecording(r); + System.out.println("Event: " + events.size()); + for (RecordedEvent event : events) { + System.out.println("Event: " + event); + } + if (OldObjects.countMatchingEvents(events, Stuff[].class, null, null, -1, "listenerLeak") == 0) { + throw new Exception("Could not find leak with " + Stuff[].class); + } + } + } + + private static void listenerLeak() throws InterruptedException { + List stuff = new ArrayList<>(OldObjects.MIN_SIZE); + for (int i = 0; i < OldObjects.MIN_SIZE; i++) { + // Allocate array to trigger sampling code path for interpreter / c1 + stuff.add(new Stuff[0]); + } + + ListenerThread t = new ListenerThread(stuff); + t.start(); + t.join(); + } + +}