1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
/*
* Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @library /test/lib
* @summary Test that retransforming and redefining anonymous classes gets UnmodifiableClassException
* @modules java.base/jdk.internal.misc
* @modules java.instrument
* jdk.jartool/sun.tools.jar
* @run main ModifyAnonymous buildagent
* @run main/othervm -javaagent:redefineagent.jar ModifyAnonymous
*/
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.lang.RuntimeException;
import java.lang.instrument.ClassDefinition;
import java.lang.instrument.ClassFileTransformer;
import java.lang.instrument.IllegalClassFormatException;
import java.lang.instrument.Instrumentation;
import java.security.ProtectionDomain;
import jdk.test.lib.compiler.InMemoryJavaCompiler;
public class ModifyAnonymous {
public static class LambdaTransformer implements ClassFileTransformer {
@Override
public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined,
ProtectionDomain protectionDomain, byte[] classfileBuffer)
throws IllegalClassFormatException {
return null;
}
}
static Instrumentation inst = null;
static volatile boolean done = false;
public static void premain(String args, Instrumentation instrumentation) {
inst = instrumentation;
System.out.println("javaagent in da house!");
instrumentation.addTransformer(new LambdaTransformer());
}
private static void buildAgent() {
try {
ClassFileInstaller.main("ModifyAnonymous");
} catch (Exception e) {
throw new RuntimeException("Could not write agent classfile", e);
}
try {
PrintWriter pw = new PrintWriter("MANIFEST.MF");
pw.println("Premain-Class: ModifyAnonymous");
pw.println("Agent-Class: ModifyAnonymous");
pw.println("Can-Retransform-Classes: true");
pw.println("Can-Redefine-Classes: true");
pw.close();
} catch (FileNotFoundException e) {
throw new RuntimeException("Could not write manifest file for the agent", e);
}
sun.tools.jar.Main jarTool = new sun.tools.jar.Main(System.out, System.err, "jar");
if (!jarTool.run(new String[] { "-cmf", "MANIFEST.MF", "redefineagent.jar", "ModifyAnonymous.class" })) {
throw new RuntimeException("Could not write the agent jar file");
}
}
public static class InstanceMethodCallSiteApp {
public static void test() throws InterruptedException {
for (int i = 0; i < 2; i++) {
InstanceMethodCallSiteApp app = new InstanceMethodCallSiteApp();
Runnable r = app::doWork; // this creates an anonymous class
while (!done) {
r.run();
Thread.sleep(10);
}
}
}
public void doWork() {
System.out.print(".");
}
}
static void runTest() {
while (!done) {
Class[] allLoadedClasses = inst.getAllLoadedClasses();
for (Class clazz : allLoadedClasses) {
final String name = clazz.getName();
if (name.contains("$$Lambda$") && name.contains("App")) {
if (inst.isModifiableClass(clazz)) {
throw new RuntimeException ("Class should not be modifiable");
}
// Try to modify them anyway.
try {
System.out.println("retransform called for " + name);
inst.retransformClasses(clazz);
} catch(java.lang.instrument.UnmodifiableClassException t) {
System.out.println("PASSED: expecting UnmodifiableClassException");
t.printStackTrace();
}
try {
System.out.println("redefine called for " + name);
String newclass = "class Dummy {}";
byte[] bytecode = InMemoryJavaCompiler.compile("Dummy", newclass);
ClassDefinition cld = new ClassDefinition(clazz, bytecode);
inst.redefineClasses(new ClassDefinition[] { cld });
} catch(java.lang.instrument.UnmodifiableClassException t) {
System.out.println("PASSED: expecting UnmodifiableClassException");
t.printStackTrace();
} catch(java.lang.ClassNotFoundException e) {
throw new RuntimeException ("ClassNotFoundException thrown");
}
done = true;
}
}
}
}
public static void main(String argv[]) throws InterruptedException, RuntimeException {
if (argv.length == 1 && argv[0].equals("buildagent")) {
buildAgent();
return;
}
if (inst == null) {
throw new RuntimeException("Instrumentation object was null");
}
new Thread() {
public void run() {
runTest();
}
}.start();
// Test that NCDFE is not thrown for anonymous class:
// ModifyAnonymous$InstanceMethodCallSiteApp$$Lambda$18
try {
ModifyAnonymous test = new ModifyAnonymous();
InstanceMethodCallSiteApp.test();
} catch (NoClassDefFoundError e) {
throw new RuntimeException("FAILED: NoClassDefFoundError thrown for " + e.getMessage());
}
System.out.println("PASSED: NoClassDefFound error not thrown");
}
}
|
