1 /*
2 * Copyright (c) 2021, Datadog, Inc. 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.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 package jdk.jfr.event.oldobject;
25
26 import java.util.ArrayList;
27 import java.util.List;
28 import java.util.Random;
29
30 import jdk.jfr.Event;
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 * @requires vm.flagless
42 * @requires vm.hasJFR
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.TestObjectSize
46 */
47 public class TestObjectSize {
48
49 private interface Leak {
50 }
51 private static class Leak1 implements Leak {
52 private long field1;
53 }
54 private static class Leak2 implements Leak {
55 private long field1;
56 private long field2;
57 }
58 private static class Leak3 implements Leak {
59 private long field1;
60 private long field2;
61 private long field3;
62 }
63
64 public static List<Object> leak = new ArrayList<>(OldObjects.MIN_SIZE);
65
66 public static void main(String[] args) throws Exception {
67 WhiteBox.setWriteAllObjectSamples(true);
68
69 final Random rand = new Random(1L);
70
71 long sizeLeak1 = -1;
72 long sizeLeak2 = -1;
73 long sizeLeak3 = -1;
74
75 do {
76 try (Recording recording = new Recording()) {
77 leak.clear();
78 recording.enable(EventNames.OldObjectSample).withStackTrace().with("cutoff", "infinity");
79 recording.start();
80
81 for (int i = 0; i < 1000; i++) {
82 if (sizeLeak1 == -1) {
83 leak.add(new Leak1());
84 continue;
85 }
86 if (sizeLeak2 == -1) {
87 leak.add(new Leak2());
88 continue;
89 }
90 if (sizeLeak3 == -1) {
91 leak.add(new Leak3());
92 }
93 }
94
95 recording.stop();
96
97 List<RecordedEvent> events = Events.fromRecording(recording);
98 for (RecordedEvent e : events) {
99 RecordedObject object = e.getValue("object");
100 RecordedClass type = object.getValue("type");
101 long objectSize = e.getLong("objectSize");
102 System.err.println("type = " + type.getName() + ", objectSize = " + e.getLong("objectSize"));
103 if (objectSize <= 0) {
104 throw new Exception("Object size for " + type.getName() + " is lower or equal to 0");
105 }
106 if (type.getName().equals(Leak1.class.getName()) && sizeLeak1 == -1) {
107 sizeLeak1 = objectSize;
108 }
109 if (type.getName().equals(Leak2.class.getName()) && sizeLeak2 == -1) {
110 sizeLeak2 = objectSize;
111 }
112 if (type.getName().equals(Leak3.class.getName()) && sizeLeak3 == -1) {
113 sizeLeak3 = objectSize;
114 }
115 }
116 }
117 } while (sizeLeak1 == -1 || sizeLeak2 == -1 || sizeLeak3 == -1);
118
119 if (sizeLeak3 <= sizeLeak2) {
120 throw new Exception("Object size for " + Leak3.class.getName() + " is lower or equal to size for" + Leak2.class.getName());
121 }
122 if (sizeLeak2 <= sizeLeak1) {
123 throw new Exception("Object size for " + Leak2.class.getName() + " is lower or equal to size for" + Leak1.class.getName());
124 }
125 }
126 }