117 lines
4.6 KiB
Java
117 lines
4.6 KiB
Java
/*
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* Copyright (c) 2006, 2024, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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*
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*
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* @bug 6439234 6446941
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*
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* Test attach used in concert with transformers and redefineClasses.
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*
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* 6439234 java.lang.instrument: 8 JCK JPLIS tests fail when running in Live phase (no transform events)
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* 6446941 java.lang.instrument: multiple agent attach fails (first agent chooses capabilities)
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*/
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import java.net.Socket;
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import java.net.InetAddress;
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import java.net.InetSocketAddress;
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import java.io.IOException;
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import java.util.Arrays;
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import java.security.ProtectionDomain;
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import java.lang.instrument.ClassFileTransformer;
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import java.lang.instrument.Instrumentation;
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import java.lang.instrument.ClassDefinition;
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public class RedefineAgent implements ClassFileTransformer {
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static byte[] classfilebytes;
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static final String targetName = "RedefineDummy";
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static final String targetNameSlashes = "RedefineDummy";
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static boolean gotRedefineTransform = false;
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// test transform and capture class bytes for redefine
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public byte[] transform(ClassLoader loader,
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String className,
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Class<?> classBeingRedefined,
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ProtectionDomain protectionDomain,
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byte[] classfileBuffer) {
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if (className.equals(targetNameSlashes)) {
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if (classBeingRedefined == null) {
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System.out.println("Got bytes for: " + className);
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classfilebytes = Arrays.copyOf(classfileBuffer, classfileBuffer.length);
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} else {
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gotRedefineTransform = true;
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}
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}
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return null;
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}
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// test transform and redefine for an attached agent
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public static void testRedefine(Instrumentation inst) throws Exception {
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Class[] classes = inst.getAllLoadedClasses();
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for (Class k : classes) {
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if (k.getName().equals(targetName)) {
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throw new Exception("RedefineAgent Test error: class " + targetName + " has already been loaded.");
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}
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}
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inst.addTransformer(new RedefineAgent());
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ClassLoader.getSystemClassLoader().loadClass(targetName);
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classes = inst.getAllLoadedClasses();
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Class targetClass = null;
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for (Class k : classes) {
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if (k.getName().equals(targetName)) {
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targetClass = k;
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break;
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}
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}
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if (targetClass == null) {
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throw new Exception("RedefineAgent Test error: class " + targetName + " not loaded.");
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}
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if (classfilebytes == null) {
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throw new Exception("RedefineAgent Error(6439234): no transform call for class " + targetName);
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}
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ClassDefinition cd = new ClassDefinition(targetClass, classfilebytes);
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inst.redefineClasses(cd);
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System.out.println("RedefineAgent did redefine.");
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if (gotRedefineTransform) {
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System.out.println("RedefineAgent got redefine transform.");
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} else {
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throw new Exception("RedefineAgent Error(6439234): no transform call for redefine " + targetName);
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}
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}
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public static void agentmain(String args, Instrumentation inst) throws Exception {
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System.out.println("RedefineAgent running...");
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System.out.println("RedefineAgent redefine supported: " + inst.isRedefineClassesSupported());
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int port = Integer.parseInt(args);
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System.out.println("RedefineAgent connecting back to Tool....");
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Socket s = new Socket();
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s.connect(new InetSocketAddress(InetAddress.getLoopbackAddress(), port));
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System.out.println("RedefineAgent connected to Tool.");
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testRedefine(inst);
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s.close();
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}
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}
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