1 /* 2 * Copyright (c) 2006, 2013, 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 * 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 = "RedefineDummy"; 47 static final String targetNameSlashes = "RedefineDummy"; 48 static boolean gotRedefineTransform = false; 49 50 // test transform and capture class bytes for redefine transform(ClassLoader loader, String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer)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 testRedefine(Instrumentation inst)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 agentmain(String args, Instrumentation inst)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 } 116