1 /* 2 * Copyright (c) 2020, 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 import java.lang.instrument.ClassFileTransformer; 26 import java.lang.instrument.IllegalClassFormatException; 27 import java.security.ProtectionDomain; 28 29 public class RedefineClassesInModuleGraphTransformer implements ClassFileTransformer { 30 public byte[] transform(ClassLoader loader, String name, Class<?> classBeingRedefined, 31 ProtectionDomain pd, byte[] buffer) throws IllegalClassFormatException { 32 System.out.println("transforming " + name); 33 34 if (name.equals("java/lang/Module") || 35 name.equals("java/lang/ModuleLayer") || 36 name.equals("java/lang/module/ResolvedModule")) { 37 throw new RuntimeException("Classes used by the module graph should never be transformed by Java agent"); 38 } 39 return null; 40 } 41 }