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.internal.test.WhiteBox; 33 import jdk.testlibrary.jfr.EventNames; 34 import jdk.testlibrary.jfr.OldObjects; 35 36 /* 37 * @test 38 * @key jfr 39 * @requires vm.gc == "null" 40 * @library /lib/testlibrary 41 * @modules jdk.jfr/jdk.jfr.internal.test 42 * @run main/othervm -XX:TLABSize=2k jdk.jfr.event.oldobject.TestHeapShallow 43 */ 44 public class TestHeapShallow { 45 private final static long LARGE_OBJECT_FACTOR = 509; // prime number 46 47 static class LeakObject { 48 Object object = null; 49 50 public LeakObject(Object object) { 51 this.object = object; 52 } 53 } 54 55 public static ArrayList<LeakObject> leak = new ArrayList<>(OldObjects.MIN_SIZE); 56 57 public static void main(String[] args) throws Exception { 58 WhiteBox.setWriteAllObjectSamples(true); 59 60 try (Recording recording = new Recording()) { 61 recording.enable(EventNames.OldObjectSample).withStackTrace().with("cutoff", "infinity"); 62 recording.start(); 63 64 addObjectsToShallowArray(leak); 65 recording.stop(); 66 if (OldObjects.countMatchingEvents(recording, "addObjectsToShallowArray", byte[].class, "object", LeakObject.class, -1) < 1) { 67 throw new Exception("Could not find shallow leak object"); 68 } 69 } 70 } 71 72 private static void addObjectsToShallowArray(List<LeakObject> list) { 73 for (int i = 0; i < OldObjects.MIN_SIZE; i++) { 74 if (i % LARGE_OBJECT_FACTOR == 0) { 75 // Triggers allocation outside TLAB path 76 list.add(new LeakObject(new byte[16384])); 77 } else { 78 // Triggers allocation in TLAB path 79 list.add(new LeakObject(new byte[10])); 80 } 81 } 82 } 83 }