1 /* 2 * Copyright (c) 2015, 2019, 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.io.File; 26 import java.lang.invoke.MethodHandles; 27 import sun.hotspot.WhiteBox; 28 29 public class RewriteBytecodes { main(String args[])30 public static void main(String args[]) throws Throwable { 31 String from = "___xxx___"; 32 String to = "___yyy___"; 33 File clsFile = new File(args[0]); 34 Class superClass = Util.defineModifiedClass(MethodHandles.lookup(), clsFile, from, to); 35 36 Child child = new Child(); 37 38 if (child.getClass().getSuperclass() != superClass) { 39 throw new RuntimeException("Mismatched super class"); 40 } 41 // Even if the Super class is not loaded from the CDS archive, make sure the Child class 42 // can still be loaded successfully, and properly inherits from the rewritten version 43 // of Super. 44 if (!child.toString().equals(to)) { 45 throw new RuntimeException("Wrong output, expected: " + to + ", but got: " + child.toString()); 46 } 47 48 WhiteBox wb = WhiteBox.getWhiteBox(); 49 if (wb.isSharedClass(superClass)) { 50 throw new RuntimeException("wb.isSharedClass(superClass) should be false"); 51 } 52 if (wb.isSharedClass(child.getClass())) { 53 throw new RuntimeException("wb.isSharedClass(child.getClass()) should be false"); 54 } 55 } 56 } 57