J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any questions. |
| 22 | */ |
| 23 | |
| 24 | /* |
| 25 | * |
| 26 | * |
| 27 | * @bug 6439234 6446941 |
| 28 | * |
| 29 | * Test attach used in concert with transformers and redefineClasses. |
| 30 | * |
| 31 | * 6439234 java.lang.instrument: 8 JCK JPLIS tests fail when running in Live phase (no transform events) |
| 32 | * 6446941 java.lang.instrument: multiple agent attach fails (first agent chooses capabilities) |
| 33 | */ |
| 34 | import java.net.Socket; |
| 35 | import java.net.InetSocketAddress; |
| 36 | import java.io.IOException; |
| 37 | import java.util.Arrays; |
| 38 | import java.security.ProtectionDomain; |
| 39 | import java.lang.instrument.ClassFileTransformer; |
| 40 | import java.lang.instrument.Instrumentation; |
| 41 | import java.lang.instrument.ClassDefinition; |
| 42 | |
| 43 | public class RedefineAgent implements ClassFileTransformer { |
| 44 | |
| 45 | static byte[] classfilebytes; |
| 46 | static final String targetName = "java.math.BigInteger"; |
| 47 | static final String targetNameSlashes = "java/math/BigInteger"; |
| 48 | static boolean gotRedefineTransform = false; |
| 49 | |
| 50 | // test transform and capture class bytes for redefine |
| 51 | public byte[] transform(ClassLoader loader, |
| 52 | String className, |
| 53 | Class<?> classBeingRedefined, |
| 54 | ProtectionDomain protectionDomain, |
| 55 | byte[] classfileBuffer) { |
| 56 | if (className.equals(targetNameSlashes)) { |
| 57 | if (classBeingRedefined == null) { |
| 58 | System.out.println("Got bytes for: " + className); |
| 59 | classfilebytes = Arrays.copyOf(classfileBuffer, classfileBuffer.length); |
| 60 | } else { |
| 61 | gotRedefineTransform = true; |
| 62 | } |
| 63 | } |
| 64 | return null; |
| 65 | } |
| 66 | |
| 67 | // test transform and redefine for an attached agent |
| 68 | public static void testRedefine(Instrumentation inst) throws Exception { |
| 69 | Class[] classes = inst.getAllLoadedClasses(); |
| 70 | for (Class k : classes) { |
| 71 | if (k.getName().equals(targetName)) { |
| 72 | throw new Exception("RedefineAgent Test error: class " + targetName + " has already been loaded."); |
| 73 | } |
| 74 | } |
| 75 | inst.addTransformer(new RedefineAgent()); |
| 76 | ClassLoader.getSystemClassLoader().loadClass(targetName); |
| 77 | classes = inst.getAllLoadedClasses(); |
| 78 | Class targetClass = null; |
| 79 | for (Class k : classes) { |
| 80 | if (k.getName().equals(targetName)) { |
| 81 | targetClass = k; |
| 82 | break; |
| 83 | } |
| 84 | } |
| 85 | if (targetClass == null) { |
| 86 | throw new Exception("RedefineAgent Test error: class " + targetName + " not loaded."); |
| 87 | } |
| 88 | if (classfilebytes == null) { |
| 89 | throw new Exception("RedefineAgent Error(6439234): no transform call for class " + targetName); |
| 90 | } |
| 91 | ClassDefinition cd = new ClassDefinition(targetClass, classfilebytes); |
| 92 | inst.redefineClasses(cd); |
| 93 | System.out.println("RedefineAgent did redefine."); |
| 94 | if (gotRedefineTransform) { |
| 95 | System.out.println("RedefineAgent got redefine transform."); |
| 96 | } else { |
| 97 | throw new Exception("RedefineAgent Error(6439234): no transform call for redefine " + targetName); |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | public static void agentmain(String args, Instrumentation inst) throws Exception { |
| 102 | System.out.println("RedefineAgent running..."); |
| 103 | System.out.println("RedefineAgent redefine supported: " + inst.isRedefineClassesSupported()); |
| 104 | int port = Integer.parseInt(args); |
| 105 | System.out.println("RedefineAgent connecting back to Tool...."); |
| 106 | Socket s = new Socket(); |
| 107 | s.connect( new InetSocketAddress(port) ); |
| 108 | System.out.println("RedefineAgent connected to Tool."); |
| 109 | |
| 110 | testRedefine(inst); |
| 111 | |
| 112 | s.close(); |
| 113 | } |
| 114 | |
| 115 | } |