1 /*
2 * Copyright (c) 2018, 2025, 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.
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
29 import jdk.jfr.Event;
30 import jdk.jfr.Recording;
31 import jdk.jfr.consumer.RecordedClass;
32 import jdk.jfr.consumer.RecordedEvent;
33 import jdk.jfr.consumer.RecordedObject;
34 import jdk.jfr.internal.test.WhiteBox;
35 import jdk.test.lib.jfr.EventNames;
36 import jdk.test.lib.jfr.Events;
37
38 /**
39 * @test
40 * @requires vm.flagless
41 * @requires vm.hasJFR
42 * @library /test/lib /test/jdk
43 * @modules jdk.jfr/jdk.jfr.internal.test
44 * @run main/othervm -XX:TLABSize=2k jdk.jfr.event.oldobject.TestAllocationTime
45 */
46 public class TestAllocationTime {
47
48 private static class BeforeLeakEvent extends Event {
49 }
50 private static class AfterLeakEvent extends Event {
51 }
52 private static class Leak {
53 }
54
55 public static List<Leak[]> leak = new ArrayList<>(OldObjects.MIN_SIZE);
56
57 public static void main(String[] args) throws Exception {
58 WhiteBox.setWriteAllObjectSamples(true);
59
60 while(true) {
61 try (Recording recording = new Recording()) {
62 leak.clear();
63 recording.enable(EventNames.OldObjectSample).withStackTrace().with("cutoff", "1 h");
64 recording.start();
65
66 BeforeLeakEvent be = new BeforeLeakEvent();
67 be.commit();
68
69 // Allocate array to trigger sampling code path for interpreter / c1
70 for (int i = 0; i < OldObjects.MIN_SIZE; i++) {
71 leak.add(new Leak[0]);
72 }
73
74 AfterLeakEvent ae = new AfterLeakEvent();
75 ae.commit();
76
77 recording.stop();
78
79 List<RecordedEvent> events = Events.fromRecording(recording);
80 Events.hasEvents(events);
81 RecordedObject sample = findLeak(events, BeforeLeakEvent.class.getName());
82 if (sample != null) {
83 long beforeTime = find(events, BeforeLeakEvent.class.getName()).getValue("startTime");
84 long allocationTime = sample.getValue("allocationTime");
85 long afterTime = find(events, AfterLeakEvent.class.getName()).getValue("startTime");
86 System.out.println("Before time : " + beforeTime);
87 System.out.println("Allocation time : " + allocationTime);
88 System.out.println("After time : " + afterTime);
89
90 if (allocationTime < beforeTime) {
91 throw new Exception("Allocation should not happen this early");
92 }
93 if (allocationTime > afterTime) {
94 throw new Exception("Allocation should not happen this late");
95 }
96 return; // sample ok
97 }
98 }
99 }
100 }
101
102 private static RecordedObject findLeak(List<RecordedEvent> events, String name) throws Exception {
103 for (RecordedEvent e : events) {
104 if (e.getEventType().getName().equals(EventNames.OldObjectSample)) {
105 RecordedObject object = e.getValue("object");
106 RecordedClass rc = object.getValue("type");
107 if (rc.getName().equals(Leak[].class.getName())) {
108 return e;
109 }
110 }
111 }
112 return null;
113 }
114
115 private static RecordedEvent find(List<RecordedEvent> events, String name) throws Exception {
116 for (RecordedEvent e : events) {
117 if (e.getEventType().getName().equals(name)) {
118 return e;
119 }
120 }
121 throw new Exception("Could not find event with name " + name);
122 }
123 }