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.RecordedClass; 33 import jdk.jfr.consumer.RecordedEvent; 34 import jdk.jfr.consumer.RecordedObject; 35 import jdk.jfr.internal.test.WhiteBox; 36 import jdk.testlibrary.jfr.EventNames; 37 import jdk.testlibrary.jfr.Events; 38 import jdk.testlibrary.jfr.OldObjects; 39 40 /* 41 * @test 42 * @key jfr 43 * @requires vm.gc == "null" 44 * @library /lib/testlibrary 45 * @modules jdk.jfr/jdk.jfr.internal.test 46 * @run main/othervm -XX:TLABSize=2k jdk.jfr.event.oldobject.TestArrayInformation 47 */ 48 public class TestArrayInformation { 49 50 private static class ArrayLeak { 51 } 52 53 private static final int CHAIN_DEPTH = 50; 54 private static final int ARRAY_SIZE = 52; 55 private static final int ARRAY_INDEX = 26; 56 57 public static List<Object> leak = new ArrayList<>(25); 58 59 public static void main(String[] args) throws Exception { 60 WhiteBox.setWriteAllObjectSamples(true); 61 62 try (Recording recording = new Recording()) { 63 recording.enable(EventNames.OldObjectSample).withoutStackTrace().with("cutoff", "infinity"); 64 recording.start(); 65 for(int i = 0; i < 25; i++) { 66 leak.add( buildNestedArray(CHAIN_DEPTH)); 67 } 68 recording.stop(); 69 List<RecordedEvent> events = Events.fromRecording(recording); 70 Events.hasEvents(events); 71 verifyObjectArray(events); 72 } 73 } 74 75 private static void verifyObjectArray(List<RecordedEvent> events) throws Exception { 76 for (RecordedEvent e : events) { 77 RecordedObject object = e.getValue("object"); 78 RecordedClass objectType = object.getValue("type"); 79 RecordedObject referrer = object.getValue("referrer"); 80 System.out.println(objectType.getName()); 81 if (objectType.getName().equals(ArrayLeak[].class.getName())) { 82 for (int i = 0; i < CHAIN_DEPTH; i++) { 83 object = referrer.getValue("object"); 84 if (object == null) { 85 throw new Exception("Expected referrer object"); 86 } 87 objectType = object.getValue("type"); 88 if (!objectType.getName().equals(Object[].class.getName())) { 89 throw new Exception("Expect array class to be named " + Object[].class + " but found " + objectType.getName()); 90 } 91 RecordedObject field = referrer.getValue("field"); 92 if (field != null) { 93 throw new Exception("Didn't expect to find field"); 94 } 95 RecordedObject array = referrer.getValue("array"); 96 if (array == null) { 97 throw new Exception("Expected array object, but got null"); 98 } 99 int index = referrer.getValue("array.index"); 100 if (index != ARRAY_INDEX) { 101 throw new Exception("Expected array index: " + ARRAY_INDEX + ", but got " + index); 102 } 103 int size = referrer.getValue("array.size"); 104 if (size != ARRAY_SIZE) { 105 throw new Exception("Expected array size: " + ARRAY_SIZE + ", but got " + size); 106 } 107 referrer = object.getValue("referrer"); 108 } 109 return; 110 } 111 } 112 throw new Exception("Could not find event with " + ArrayLeak[].class + " as (leak) object"); 113 } 114 115 private static Object buildNestedArray(int depth) { 116 if (depth > 0) { 117 Object[] array = new Object[ARRAY_SIZE]; 118 array[ARRAY_INDEX] = buildNestedArray(depth - 1); 119 return array; 120 } else { 121 return new ArrayLeak[OldObjects.MIN_SIZE]; 122 } 123 } 124 125 }