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.api.consumer;
27
28 import java.util.List;
29
30 import jdk.jfr.Recording;
31 import jdk.jfr.consumer.RecordedClass;
32 import jdk.jfr.consumer.RecordedClassLoader;
33 import jdk.jfr.consumer.RecordedEvent;
34 import jdk.test.lib.Asserts;
35 import jdk.test.lib.jfr.EventNames;
36 import jdk.test.lib.jfr.Events;
37 import jdk.test.lib.jfr.TestClassLoader;
38
39 /**
40 * @test
41 * @summary Verifies the methods of the RecordedClassLoader
42 * @key jfr
43 *
44 * @library /lib /
45 * @run main/othervm jdk.jfr.api.consumer.TestRecordedClassLoader
46 */
47 public class TestRecordedClassLoader {
48 private final static String TEST_CLASS_NAME = "jdk.jfr.api.consumer.TestRecordedClassLoader$MyTestClass";
49 private final static String EVENT_NAME = EventNames.ClassDefine;
50
51 static class MyTestClass {
52 }
53
54 public static void main(String[] args) throws Exception {
55 Recording recording = new Recording();
56 recording.enable(EVENT_NAME).withoutStackTrace();
57 TestClassLoader cl = new TestClassLoader();
58 recording.start();
59 cl.loadClass(TEST_CLASS_NAME);
60 recording.stop();
61
62 List<RecordedEvent> events = Events.fromRecording(recording);
63 boolean isDefined = false;
64 for (RecordedEvent event : events) {
65 RecordedClass definedClass = event.getValue("definedClass");
66 if (TEST_CLASS_NAME.equals(definedClass.getName())) {
67 System.out.println(event);
68
69 // get the RecordedClassLoader from the RecordedClass, the "definedClass"
70 RecordedClassLoader definingClassLoader = definedClass.getClassLoader();
71 Asserts.assertNotNull(definingClassLoader, "Defining Class Loader should not be null");
72
73 // invoke RecordedClassLoader.getType() in order to validate the type of the RecordedClassLoader
74 RecordedClass definingClassLoaderType = definingClassLoader.getType();
75 Asserts.assertNotNull(definingClassLoaderType, "The defining Class Loader type should not be null");
76
77 // verify matching types
78 Asserts.assertEquals(cl.getClass().getName(), definingClassLoaderType.getName(),
79 "Expected type " + cl.getClass().getName() + ", got type " + definingClassLoaderType.getName());
80
81 // get a RecordedClassLoader directly from the "definingClassLoader" field as well
82 RecordedClassLoader definingClassLoaderFromField = event.getValue("definingClassLoader");
83 Asserts.assertNotNull(definingClassLoaderFromField,
84 "Defining Class Loader instantatiated from field should not be null");
85
86 // ensure that the class loader instance used in the test actually has a name
87 //Asserts.assertNotNull(cl.getName(),
88 // "Expected a valid name for the TestClassLoader");
89
90 // invoke RecordedClassLoader.getName() to get the name of the class loader instance
91 //Asserts.assertEquals(cl.getName(), definingClassLoader.getName(),
92 // "Defining Class Loader should have the same name as the original class loader");
93 Asserts.assertEquals(definingClassLoaderFromField.getName(), definingClassLoader.getName(),
94 "Defining Class Loader representations should have the same class loader name");
95
96 // invoke uniqueID()
97 Asserts.assertGreaterThan(definingClassLoader.getId(), 0L, "Invalid id assignment");
98
99 // second order class loader information ("check class loader of the class loader")
100 RecordedClassLoader classLoaderOfDefClassLoader = definingClassLoaderType.getClassLoader();
101 Asserts.assertNotNull(classLoaderOfDefClassLoader,
102 "The class loader for the definining class loader should not be null");
103 // Asserts.assertEquals(cl.getClass().getClassLoader().getName(), classLoaderOfDefClassLoader.getName(),
104 // "Expected class loader name " + cl.getClass().getClassLoader().getName() + ", got name " + classLoaderOfDefClassLoader.getName());
105
106 RecordedClass classLoaderOfDefClassLoaderType = classLoaderOfDefClassLoader.getType();
107 Asserts.assertNotNull(classLoaderOfDefClassLoaderType,
108 "The class loader type for the defining class loader should not be null");
109 Asserts.assertEquals(cl.getClass().getClassLoader().getClass().getName(), classLoaderOfDefClassLoaderType.getName(),
110 "Expected type " + cl.getClass().getClassLoader().getClass().getName() + ", got type " + classLoaderOfDefClassLoaderType.getName());
111
112 Asserts.assertGreaterThan(definingClassLoader.getId(), classLoaderOfDefClassLoader.getId(),
113 "expected id assignment invariant broken for Class Loaders");
114
115 isDefined = true;
116 }
117 }
118 Asserts.assertTrue(isDefined, "No class define event found to verify RecordedClassLoader");
119 }
120 }