1 /*
2 * Copyright (c) 2014, 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.runtime;
27
28 import java.io.File;
29 import java.io.FileInputStream;
30 import java.io.IOException;
31 import java.nio.ByteBuffer;
32 import java.nio.channels.FileChannel;
33 import java.util.List;
34
35 import jdk.jfr.Recording;
36 import jdk.jfr.consumer.RecordedClassLoader;
37 import jdk.jfr.consumer.RecordedEvent;
38 import jdk.test.lib.Asserts;
39 import jdk.test.lib.jfr.EventNames;
40 import jdk.test.lib.jfr.Events;
41
42 /*
43 * @test
44 * @key jfr
45 * @library /test/lib /test/jdk
46 * @build jdk.jfr.event.runtime.TestClasses
47 * @run main/othervm jdk.jfr.event.runtime.TestClassLoaderStatsEvent
48 */
49 public class TestClassLoaderStatsEvent {
50 private final static String EVENT_NAME = EventNames.ClassLoaderStatistics;
51 private final static String CLASS_LOADER_NAME = "MyDummyClassLoader";
52 private final static String CLASSLOADER_TYPE_NAME = "jdk.jfr.event.runtime.TestClassLoaderStatsEvent$DummyClassLoader";
53 public static DummyClassLoader dummyloader;
54
55 public static void main(String[] args) throws Throwable {
56 createDummyClassLoader(CLASS_LOADER_NAME);
57
58 Recording recording = new Recording();
59 recording.enable(EVENT_NAME);
60 recording.start();
61 recording.stop();
62 List<RecordedEvent> consumer = Events.fromRecording(recording);
63 Events.hasEvents(consumer);
64
65 boolean isAnyFound = false;
66 for (RecordedEvent event : consumer) {
67 System.out.println("Event:" + event);
68 if (Events.assertField(event, "classLoader").getValue() == null) {
69 continue;
70 }
71 RecordedClassLoader recordedClassLoader = event.getValue("classLoader");
72 if (CLASSLOADER_TYPE_NAME.equals(recordedClassLoader.getType().getName())) {
73 Asserts.assertEquals(CLASS_LOADER_NAME, recordedClassLoader.getName(),
74 "Expected class loader name " + CLASS_LOADER_NAME + ", got name " + recordedClassLoader.getName());
75 Events.assertField(event, "classCount").equal(1L);
76 Events.assertField(event, "chunkSize").above(1L);
77 Events.assertField(event, "blockSize").above(1L);
78 Events.assertField(event, "anonymousClassCount").equal(1L);
79 Events.assertField(event, "anonymousChunkSize").above(1L);
80 Events.assertField(event, "anonymousBlockSize").above(1L);
81 isAnyFound = true;
82 }
83 }
84 Asserts.assertTrue(isAnyFound, "No events found");
85 }
86
87 private static void createDummyClassLoader(String name) throws Throwable {
88 dummyloader = new DummyClassLoader(name);
89 Class<?> c = Class.forName(TestClass.class.getName(), true, dummyloader);
90 if (c.getClassLoader() != dummyloader) {
91 throw new RuntimeException("TestClass defined by wrong classloader: " + c.getClassLoader());
92 }
93 }
94
95 public static class DummyClassLoader extends ClassLoader {
96
97 static ByteBuffer readClassFile(String name) {
98 String testClasses = System.getProperty("test.classes");
99 File f = new File(testClasses, name);
100 try (FileInputStream fin = new FileInputStream(f)) {
101 FileChannel fc = fin.getChannel();
102 return fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
103 } catch (IOException e) {
104 throw new RuntimeException("Can't open file: " + f, e);
105 }
106 }
107
108 protected Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
109 Class<?> c;
110 if (TestClass.class.getName().equals(name)) {
111 c = findClass(name);
112 if (resolve) {
113 resolveClass(c);
114 }
115 } else {
116 c = super.loadClass(name, resolve);
117 }
118 return c;
119 }
120
121 protected Class<?> findClass(String name) throws ClassNotFoundException {
122 if (!TestClass.class.getName().equals(name)) {
123 throw new ClassNotFoundException("Unexpected class: " + name);
124 }
125 return defineClass(name, readClassFile(TestClass.class.getName().replace(".", File.separator) + ".class"), null);
126 }
127
128 public DummyClassLoader(String name) {
129 super(name, ClassLoader.getSystemClassLoader());
130 }
131 }
132 }