1
2 /*
3 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 */
24
25 /**
26 * @test
27 * @bug 8008678
28 * @summary JSR 292: constant pool reconstitution must support pseudo strings
29 * @library /test/lib
30 * @modules java.base/jdk.internal.misc
31 * java.instrument
32 * java.management
33 * jdk.jartool/sun.tools.jar
34 * @compile -XDignore.symbol.file TestLambdaFormRetransformation.java
35 * @run main TestLambdaFormRetransformation
36 */
37
38 import java.io.IOException;
39 import java.lang.instrument.ClassFileTransformer;
40 import java.lang.instrument.IllegalClassFormatException;
41 import java.lang.instrument.Instrumentation;
42 import java.lang.instrument.UnmodifiableClassException;
43 import java.nio.file.Files;
44 import java.nio.file.Path;
45 import java.nio.file.Paths;
46 import java.security.ProtectionDomain;
47 import java.util.Arrays;
48
49 import jdk.test.lib.process.ExitCode;
50 import jdk.test.lib.process.OutputAnalyzer;
51 import jdk.test.lib.process.ProcessTools;
52
53 public class TestLambdaFormRetransformation {
54 private static String MANIFEST = String.format("Manifest-Version: 1.0\n" +
55 "Premain-Class: %s\n" +
56 "Can-Retransform-Classes: true\n",
57 Agent.class.getName());
58
59 private static String CP = System.getProperty("test.classes");
60
61 public static void main(String args[]) throws Throwable {
62 Path agent = TestLambdaFormRetransformation.buildAgent();
63 OutputAnalyzer oa = ProcessTools.executeTestJvm("-javaagent:" +
64 agent.toAbsolutePath().toString(), "-version");
65 oa.shouldHaveExitValue(ExitCode.OK.value);
66 }
67
68 private static Path buildAgent() throws IOException {
69 Path manifest = TestLambdaFormRetransformation.createManifest();
70 Path jar = Files.createTempFile(Paths.get("."), null, ".jar");
71
72 String[] args = new String[] {
73 "-cfm",
74 jar.toAbsolutePath().toString(),
75 manifest.toAbsolutePath().toString(),
76 "-C",
77 TestLambdaFormRetransformation.CP,
78 Agent.class.getName() + ".class"
79 };
80
81 sun.tools.jar.Main jarTool = new sun.tools.jar.Main(System.out, System.err, "jar");
82
83 if (!jarTool.run(args)) {
84 throw new Error("jar failed: args=" + Arrays.toString(args));
85 }
86 return jar;
87 }
88
89 private static Path createManifest() throws IOException {
90 Path manifest = Files.createTempFile(Paths.get("."), null, ".mf");
91 byte[] manifestBytes = TestLambdaFormRetransformation.MANIFEST.getBytes();
92 Files.write(manifest, manifestBytes);
93 return manifest;
94 }
95 }
96
97 class Agent implements ClassFileTransformer {
98 private static Runnable lambda = () -> {
99 System.out.println("I'll crash you!");
100 };
101
102 public static void premain(String args, Instrumentation instrumentation) {
103 if (!instrumentation.isRetransformClassesSupported()) {
104 System.out.println("Class retransformation is not supported.");
105 return;
106 }
107 System.out.println("Calling lambda to ensure that lambda forms were created");
108
109 Agent.lambda.run();
110
111 System.out.println("Registering class file transformer");
112
113 instrumentation.addTransformer(new Agent());
114
115 for (Class c : instrumentation.getAllLoadedClasses()) {
116 if (c.getName().contains("LambdaForm") &&
117 instrumentation.isModifiableClass(c)) {
118 System.out.format("We've found a modifiable lambda form: %s%n", c.getName());
119 try {
120 instrumentation.retransformClasses(c);
121 } catch (UnmodifiableClassException e) {
122 throw new AssertionError("Modification of modifiable class " +
123 "caused UnmodifiableClassException", e);
124 }
125 }
126 }
127 }
128
129 public static void main(String args[]) {
130 }
131
132 @Override
133 public byte[] transform(ClassLoader loader,
134 String className,
135 Class<?> classBeingRedefined,
136 ProtectionDomain protectionDomain,
137 byte[] classfileBuffer
138 ) throws IllegalClassFormatException {
139 System.out.println("Transforming " + className);
140 return classfileBuffer.clone();
141 }
142 }