1 /* 2 * Copyright (c) 2018, 2020, 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.hasJFR 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.TestThreadLocalLeak 44 */ 45 public class TestThreadLocalLeak { 46 47 private static ThreadLocal<List<ThreadLocalObject[]>> threadLocal = new ThreadLocal<List<ThreadLocalObject[]>>() { 48 @Override 49 public List<ThreadLocalObject[]> initialValue() { 50 return new ArrayList<ThreadLocalObject[]>(OldObjects.MIN_SIZE); 51 } 52 }; 53 54 static class ThreadLocalObject { 55 } 56 main(String[] args)57 public static void main(String[] args) throws Exception { 58 WhiteBox.setWriteAllObjectSamples(true); 59 60 while (true) { 61 try (Recording r = new Recording()) { 62 r.enable(EventNames.OldObjectSample).withStackTrace().with("cutoff", "infinity"); 63 r.start(); 64 allocateThreadLocal(); 65 r.stop(); 66 List<RecordedEvent> events = Events.fromRecording(r); 67 if (OldObjects.countMatchingEvents(events, ThreadLocalObject[].class, null, null, -1, "allocateThreadLocal") > 0) { 68 return; 69 } 70 System.out.println("Failed to find ThreadLocalObject leak. Retrying."); 71 threadLocal.get().clear(); 72 } 73 } 74 } 75 allocateThreadLocal()76 private static void allocateThreadLocal() { 77 for (int i = 0; i < OldObjects.MIN_SIZE; i++) { 78 // Allocate array to trigger sampling code path for interpreter / c1 79 threadLocal.get().add(new ThreadLocalObject[0]); 80 } 81 } 82 83 } 84