| /* |
| * Copyright (c) 2006, 2013, 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. |
| */ |
| |
| /* |
| * |
| * |
| * @bug 6439234 6446941 |
| * |
| * Test attach used in concert with transformers and redefineClasses. |
| * |
| * 6439234 java.lang.instrument: 8 JCK JPLIS tests fail when running in Live phase (no transform events) |
| * 6446941 java.lang.instrument: multiple agent attach fails (first agent chooses capabilities) |
| */ |
| import java.net.Socket; |
| import java.net.InetSocketAddress; |
| import java.io.IOException; |
| import java.util.Arrays; |
| import java.security.ProtectionDomain; |
| import java.lang.instrument.ClassFileTransformer; |
| import java.lang.instrument.Instrumentation; |
| import java.lang.instrument.ClassDefinition; |
| |
| public class RedefineAgent implements ClassFileTransformer { |
| |
| static byte[] classfilebytes; |
| static final String targetName = "RedefineDummy"; |
| static final String targetNameSlashes = "RedefineDummy"; |
| static boolean gotRedefineTransform = false; |
| |
| // test transform and capture class bytes for redefine |
| public byte[] transform(ClassLoader loader, |
| String className, |
| Class<?> classBeingRedefined, |
| ProtectionDomain protectionDomain, |
| byte[] classfileBuffer) { |
| if (className.equals(targetNameSlashes)) { |
| if (classBeingRedefined == null) { |
| System.out.println("Got bytes for: " + className); |
| classfilebytes = Arrays.copyOf(classfileBuffer, classfileBuffer.length); |
| } else { |
| gotRedefineTransform = true; |
| } |
| } |
| return null; |
| } |
| |
| // test transform and redefine for an attached agent |
| public static void testRedefine(Instrumentation inst) throws Exception { |
| Class[] classes = inst.getAllLoadedClasses(); |
| for (Class k : classes) { |
| if (k.getName().equals(targetName)) { |
| throw new Exception("RedefineAgent Test error: class " + targetName + " has already been loaded."); |
| } |
| } |
| inst.addTransformer(new RedefineAgent()); |
| ClassLoader.getSystemClassLoader().loadClass(targetName); |
| classes = inst.getAllLoadedClasses(); |
| Class targetClass = null; |
| for (Class k : classes) { |
| if (k.getName().equals(targetName)) { |
| targetClass = k; |
| break; |
| } |
| } |
| if (targetClass == null) { |
| throw new Exception("RedefineAgent Test error: class " + targetName + " not loaded."); |
| } |
| if (classfilebytes == null) { |
| throw new Exception("RedefineAgent Error(6439234): no transform call for class " + targetName); |
| } |
| ClassDefinition cd = new ClassDefinition(targetClass, classfilebytes); |
| inst.redefineClasses(cd); |
| System.out.println("RedefineAgent did redefine."); |
| if (gotRedefineTransform) { |
| System.out.println("RedefineAgent got redefine transform."); |
| } else { |
| throw new Exception("RedefineAgent Error(6439234): no transform call for redefine " + targetName); |
| } |
| } |
| |
| public static void agentmain(String args, Instrumentation inst) throws Exception { |
| System.out.println("RedefineAgent running..."); |
| System.out.println("RedefineAgent redefine supported: " + inst.isRedefineClassesSupported()); |
| int port = Integer.parseInt(args); |
| System.out.println("RedefineAgent connecting back to Tool...."); |
| Socket s = new Socket(); |
| s.connect( new InetSocketAddress(port) ); |
| System.out.println("RedefineAgent connected to Tool."); |
| |
| testRedefine(inst); |
| |
| s.close(); |
| } |
| |
| } |