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