1 /*
2 * Copyright (c) 2015, 2016, 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 * @bug 8008678
27 * @summary JSR 292: constant pool reconstitution must support pseudo strings
28 * @library /test/lib
29 * @modules java.base/jdk.internal.misc
30 * java.instrument
31 * java.management
32 * jdk.jartool/sun.tools.jar
33 * @compile -XDignore.symbol.file TestLambdaFormRetransformation.java
34 * @run main TestLambdaFormRetransformation
35 */
36
37 import java.io.IOException;
38 import java.lang.instrument.ClassFileTransformer;
39 import java.lang.instrument.IllegalClassFormatException;
40 import java.lang.instrument.Instrumentation;
41 import java.lang.instrument.UnmodifiableClassException;
42 import java.nio.file.Files;
43 import java.nio.file.Path;
44 import java.nio.file.Paths;
45 import java.security.ProtectionDomain;
46 import java.util.Arrays;
47
48 import jdk.test.lib.process.ExitCode;
49 import jdk.test.lib.process.OutputAnalyzer;
50 import jdk.test.lib.process.ProcessTools;
51
52 public class TestLambdaFormRetransformation {
53 private static String MANIFEST = String.format("Manifest-Version: 1.0\n" +
54 "Premain-Class: %s\n" +
55 "Can-Retransform-Classes: true\n",
56 Agent.class.getName());
57
58 private static String CP = System.getProperty("test.classes");
59
60 public static void main(String args[]) throws Throwable {
61 Path agent = TestLambdaFormRetransformation.buildAgent();
62 OutputAnalyzer oa = ProcessTools.executeTestJvm("-javaagent:" +
63 agent.toAbsolutePath().toString(), "-version");
64 oa.shouldHaveExitValue(ExitCode.OK.value);
65 }
66
67 private static Path buildAgent() throws IOException {
68 Path manifest = TestLambdaFormRetransformation.createManifest();
69 Path jar = Files.createTempFile(Paths.get("."), null, ".jar");
70
71 String[] args = new String[] {
72 "-cfm",
73 jar.toAbsolutePath().toString(),
74 manifest.toAbsolutePath().toString(),
75 "-C",
76 TestLambdaFormRetransformation.CP,
77 Agent.class.getName() + ".class"
78 };
79
80 sun.tools.jar.Main jarTool = new sun.tools.jar.Main(System.out, System.err, "jar");
81
82 if (!jarTool.run(args)) {
83 throw new Error("jar failed: args=" + Arrays.toString(args));
84 }
85 return jar;
86 }
87
88 private static Path createManifest() throws IOException {
89 Path manifest = Files.createTempFile(Paths.get("."), null, ".mf");
90 byte[] manifestBytes = TestLambdaFormRetransformation.MANIFEST.getBytes();
91 Files.write(manifest, manifestBytes);
92 return manifest;
93 }
94 }
95
96 class Agent implements ClassFileTransformer {
97 private static Runnable lambda = () -> {
98 System.out.println("I'll crash you!");
99 };
100
101 public static void premain(String args, Instrumentation instrumentation) {
102 if (!instrumentation.isRetransformClassesSupported()) {
103 System.out.println("Class retransformation is not supported.");
104 return;
105 }
106 System.out.println("Calling lambda to ensure that lambda forms were created");
107
108 Agent.lambda.run();
109
110 System.out.println("Registering class file transformer");
111
112 instrumentation.addTransformer(new Agent());
113
114 for (Class c : instrumentation.getAllLoadedClasses()) {
115 if (c.getName().contains("LambdaForm") &&
116 instrumentation.isModifiableClass(c)) {
117 System.out.format("We've found a modifiable lambda form: %s%n", c.getName());
118 try {
119 instrumentation.retransformClasses(c);
120 } catch (UnmodifiableClassException e) {
121 throw new AssertionError("Modification of modifiable class " +
122 "caused UnmodifiableClassException", e);
123 }
124 }
125 }
126 }
127
128 public static void main(String args[]) {
129 }
130
131 @Override
132 public byte[] transform(ClassLoader loader,
133 String className,
134 Class<?> classBeingRedefined,
135 ProtectionDomain protectionDomain,
136 byte[] classfileBuffer
137 ) throws IllegalClassFormatException {
138 System.out.println("Transforming " + className);
139 return classfileBuffer.clone();
140 }
141 }