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