1 /* 2 * Copyright (c) 2015, 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 package jdk.jfr.event.oldobject; 26 27 import java.util.ArrayList; 28 import java.util.List; 29 30 import jdk.jfr.Recording; 31 import jdk.jfr.consumer.RecordedEvent; 32 import jdk.jfr.internal.test.WhiteBox; 33 import jdk.test.lib.jfr.EventNames; 34 import jdk.test.lib.jfr.Events; 35 36 /** 37 * @test 38 * @key jfr 39 * @requires vm.hasJFR 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.TestHeapDeep 44 */ 45 public class TestHeapDeep { 46 47 final static class ChainNode { 48 final ChainNode next; 49 List<byte[]> leaks; 50 51 public ChainNode(ChainNode node) { 52 next = node; 53 } 54 } 55 56 public static ChainNode leak; 57 58 public static void main(String[] args) throws Exception { 59 WhiteBox.setWriteAllObjectSamples(true); 60 61 try (Recording r = new Recording()) { 62 r.enable(EventNames.OldObjectSample).withStackTrace().with("cutoff", "infinity"); 63 r.start(); 64 leak = createChain(); 65 List<RecordedEvent> events = Events.fromRecording(r); 66 if (OldObjects.countMatchingEvents(events, byte[].class, null, null, -1, "createChain") == 0) { 67 throw new Exception("Could not find ChainNode"); 68 } 69 for (RecordedEvent e : events) { 70 OldObjects.validateReferenceChainLimit(e, OldObjects.MAX_CHAIN_LENGTH); 71 } 72 } 73 } 74 75 private static ChainNode createChain() { 76 ChainNode node = new ChainNode(null); 77 node.leaks = new ArrayList<>(); 78 for (int i = 0; i < 100; i++) { 79 // Allocate arrays to trigger sampling code path for interpreter / c1 80 node.leaks.add(new byte[10_000]); 81 } 82 for (int i = 0; i < OldObjects.MIN_SIZE; i++) { 83 node = new ChainNode(node); 84 } 85 return node; 86 } 87 }