1 /*
2 * Copyright (c) 2014, 2015, 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 /*
25 * @test
26 * @summary Test of diagnostic command VM.classloader_stats
27 * @library /testlibrary
28 * @modules java.base/jdk.internal.misc
29 * java.compiler
30 * java.management
31 * jdk.jvmstat/sun.jvmstat.monitor
32 * @build jdk.test.lib.*
33 * @build jdk.test.lib.dcmd.*
34 * @run testng ClassLoaderStatsTest
35 */
36
37 import org.testng.annotations.Test;
38 import org.testng.Assert;
39
40 import jdk.test.lib.OutputAnalyzer;
41 import jdk.test.lib.dcmd.CommandExecutor;
42 import jdk.test.lib.dcmd.JMXExecutor;
43
44 import java.io.File;
45 import java.io.FileInputStream;
46 import java.io.IOException;
47 import java.nio.ByteBuffer;
48 import java.nio.channels.FileChannel;
49 import java.util.Iterator;
50 import java.util.regex.Matcher;
51 import java.util.regex.Pattern;
52
53 public class ClassLoaderStatsTest {
54
55 // ClassLoader Parent CLD* Classes ChunkSz BlockSz Type
56 // 0x00000007c0215928 0x0000000000000000 0x0000000000000000 0 0 0 org.eclipse.osgi.baseadaptor.BaseAdaptor$1
57 // 0x00000007c0009868 0x0000000000000000 0x00007fc52aebcc80 1 6144 3768 sun.reflect.DelegatingClassLoader
58 // 0x00000007c0009868 0x0000000000000000 0x00007fc52b8916d0 1 6144 3688 sun.reflect.DelegatingClassLoader
59 // 0x00000007c0009868 0x00000007c0038ba8 0x00007fc52afb8760 1 6144 3688 sun.reflect.DelegatingClassLoader
60 // 0x00000007c0009868 0x0000000000000000 0x00007fc52afbb1a0 1 6144 3688 sun.reflect.DelegatingClassLoader
61 // 0x0000000000000000 0x0000000000000000 0x00007fc523416070 5019 30060544 29956216 <boot classloader>
62 // 455 1210368 672848 + unsafe anonymous classes
63 // 0x00000007c016b5c8 0x00000007c0038ba8 0x00007fc52a995000 5 8192 5864 org.netbeans.StandardModule$OneModuleClassLoader
64 // 0x00000007c0009868 0x00000007c016b5c8 0x00007fc52ac13640 1 6144 3896 sun.reflect.DelegatingClassLoader
65 // ...
66
67 static Pattern clLine = Pattern.compile("0x\\p{XDigit}*\\s*0x\\p{XDigit}*\\s*0x\\p{XDigit}*\\s*(\\d*)\\s*(\\d*)\\s*(\\d*)\\s*(.*)");
68 static Pattern anonLine = Pattern.compile("\\s*(\\d*)\\s*(\\d*)\\s*(\\d*)\\s*.*");
69
70 public static DummyClassLoader dummyloader;
71
72 public void run(CommandExecutor executor) throws ClassNotFoundException {
73
74 // create a classloader and load our special class
75 dummyloader = new DummyClassLoader();
76 Class<?> c = Class.forName("TestClass", true, dummyloader);
77 if (c.getClassLoader() != dummyloader) {
78 Assert.fail("TestClass defined by wrong classloader: " + c.getClassLoader());
79 }
80
81 OutputAnalyzer output = executor.execute("VM.classloader_stats");
82 Iterator<String> lines = output.asLines().iterator();
83 while (lines.hasNext()) {
84 String line = lines.next();
85 Matcher m = clLine.matcher(line);
86 if (m.matches()) {
87 // verify that DummyClassLoader has loaded 1 class and 1 anonymous class
88 if (m.group(4).equals("ClassLoaderStatsTest$DummyClassLoader")) {
89 System.out.println("line: " + line);
90 if (!m.group(1).equals("1")) {
91 Assert.fail("Should have loaded 1 class: " + line);
92 }
93 checkPositiveInt(m.group(2));
94 checkPositiveInt(m.group(3));
95
96 String next = lines.next();
97 System.out.println("next: " + next);
98 Matcher m1 = anonLine.matcher(next);
99 m1.matches();
100 if (!m1.group(1).equals("1")) {
101 Assert.fail("Should have loaded 1 anonymous class, but found : " + m1.group(1));
102 }
103 checkPositiveInt(m1.group(2));
104 checkPositiveInt(m1.group(3));
105 }
106 }
107 }
108 }
109
110 private static void checkPositiveInt(String s) {
111 if (Integer.parseInt(s) <= 0) {
112 Assert.fail("Value should have been > 0: " + s);
113 }
114 }
115
116 public static class DummyClassLoader extends ClassLoader {
117
118 public static final String CLASS_NAME = "TestClass";
119
120 static ByteBuffer readClassFile(String name)
121 {
122 File f = new File(System.getProperty("test.classes", "."),
123 name);
124 try (FileInputStream fin = new FileInputStream(f);
125 FileChannel fc = fin.getChannel())
126 {
127 return fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
128 } catch (IOException e) {
129 Assert.fail("Can't open file: " + name, e);
130 }
131
132 /* Will not reach here as Assert.fail() throws exception */
133 return null;
134 }
135
136 protected Class<?> loadClass(String name, boolean resolve)
137 throws ClassNotFoundException
138 {
139 Class<?> c;
140 if (!"TestClass".equals(name)) {
141 c = super.loadClass(name, resolve);
142 } else {
143 // should not delegate to the system class loader
144 c = findClass(name);
145 if (resolve) {
146 resolveClass(c);
147 }
148 }
149 return c;
150 }
151
152 protected Class<?> findClass(String name)
153 throws ClassNotFoundException
154 {
155 if (!"TestClass".equals(name)) {
156 throw new ClassNotFoundException("Unexpected class: " + name);
157 }
158 return defineClass(name, readClassFile(name + ".class"), null);
159 }
160 } /* DummyClassLoader */
161
162 @Test
163 public void jmx() throws ClassNotFoundException {
164 run(new JMXExecutor());
165 }
166 }
167
168 class TestClass {
169 static {
170 // force creation of anonymous class (for the lambdaform)
171 Runnable r = () -> System.out.println("Hello");
172 r.run();
173 }
174 }