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