1 /*
2 * Copyright (c) 2015, 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.jcmd;
27
28 import java.io.File;
29 import java.io.IOException;
30 import java.util.ArrayList;
31 import java.util.Collections;
32 import java.util.HashMap;
33 import java.util.List;
34 import java.util.Map;
35
36 import jdk.jfr.Enabled;
37 import jdk.jfr.Recording;
38 import jdk.jfr.consumer.RecordedEvent;
39 import jdk.jfr.consumer.RecordedObject;
40 import jdk.jfr.consumer.RecordingFile;
41 import jdk.jfr.internal.test.WhiteBox;
42 import jdk.test.lib.jfr.EventNames;
43
44 /*
45 * @test
46 * @summary Start a recording with or without path-to-gc-roots
47 * @modules jdk.jfr/jdk.jfr.internal.test
48 * @library /test/lib /test/jdk
49 * @key jfr
50 *
51 * @run main/othervm -XX:TLABSize=2k jdk.jfr.jcmd.TestJcmdDumpPathToGCRoots
52 */
53 public class TestJcmdDumpPathToGCRoots {
54
55 private static final int OBJECT_COUNT = 100_000;
56 public static List<Object[]> leak = new ArrayList<>(OBJECT_COUNT);
57
58 public static void main(String[] args) throws Exception {
59 WhiteBox.setWriteAllObjectSamples(true);
60
61 String settingName = EventNames.OldObjectSample + "#" + "cutoff";
62
63 // dump parameter trumps previous setting
64 testDump("path-to-gc-roots=true", Collections.singletonMap(settingName, "infinity"), true);
65 testDump("path-to-gc-roots=true", Collections.singletonMap(settingName, "0 ns"), true);
66 testDump("path-to-gc-roots=true", Collections.emptyMap(), true);
67
68 testDump("path-to-gc-roots=false", Collections.singletonMap(settingName, "infinity"), false);
69 testDump("path-to-gc-roots=false", Collections.singletonMap(settingName, "0 ns"), false);
70 testDump("path-to-gc-roots=false", Collections.emptyMap(), false);
71
72 testDump("", Collections.singletonMap(settingName, "infinity"), true);
73 testDump("", Collections.singletonMap(settingName, "0 ns"), false);
74 testDump("", Collections.emptyMap(), false);
75 }
76
77 private static void testDump(String pathToGcRoots, Map<String, String> settings, boolean expectedChains) throws Exception {
78 try (Recording r = new Recording()) {
79 Map<String, String> p = new HashMap<>(settings);
80 p.put(EventNames.OldObjectSample + "#" + Enabled.NAME, "true");
81 r.setName("dodo");
82 r.setSettings(p);
83 r.setToDisk(true);
84 r.start();
85 clearLeak();
86 System.out.println("Recording id: " + r.getId());
87 System.out.println("Settings: " + settings.toString());
88 System.out.println("Command: JFR.dump " + pathToGcRoots);
89 System.out.println("Chains expected: " + expectedChains);
90 buildLeak();
91 System.gc();
92 System.gc();
93 File recording = new File("TestJcmdDumpPathToGCRoots" + r.getId() + ".jfr");
94 recording.delete();
95 JcmdHelper.jcmd("JFR.dump", "name=dodo", pathToGcRoots, "filename=" + recording.getAbsolutePath());
96 r.setSettings(Collections.emptyMap());
97 List<RecordedEvent> events = RecordingFile.readAllEvents(recording.toPath());
98 if (events.isEmpty()) {
99 throw new Exception("No events found in recoding");
100 }
101 boolean chains = hasChains(events);
102 if (expectedChains && !chains) {
103 System.out.println(events);
104 throw new Exception("Expected chains but found none");
105 }
106 if (!expectedChains && chains) {
107 System.out.println(events);
108 throw new Exception("Didn't expect chains but found some");
109 }
110 }
111 }
112
113 private static void clearLeak() {
114 leak.clear();
115 }
116
117 private static boolean hasChains(List<RecordedEvent> events) throws IOException {
118 for (RecordedEvent e : events) {
119 RecordedObject ro = e.getValue("object");
120 if (ro.getValue("referrer") != null) {
121 return true;
122 }
123 }
124 return false;
125 }
126
127 private static void buildLeak() {
128 for (int i = 0; i < OBJECT_COUNT;i ++) {
129 leak.add(new Object[0]);
130 }
131 }
132 }