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