/* * Copyright (c) 2015, 2017, 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. * */ import java.io.File; import sun.hotspot.WhiteBox; public class RewriteBytecodes { public static void main(String args[]) throws Throwable { String from = "___xxx___"; String to = "___yyy___"; File clsFile = new File(args[0]); Class superClass = Util.defineModifiedClass(RewriteBytecodes.class.getClassLoader(), clsFile, from, to); Child child = new Child(); if (child.getClass().getSuperclass() != superClass) { throw new RuntimeException("Mismatched super class"); } // Even if the Super class is not loaded from the CDS archive, make sure the Child class // can still be loaded successfully, and properly inherits from the rewritten version // of Super. if (!child.toString().equals(to)) { throw new RuntimeException("Wrong output, expected: " + to + ", but got: " + child.toString()); } WhiteBox wb = WhiteBox.getWhiteBox(); if (wb.isSharedClass(superClass)) { throw new RuntimeException("wb.isSharedClass(superClass) should be false"); } if (wb.isSharedClass(child.getClass())) { throw new RuntimeException("wb.isSharedClass(child.getClass()) should be false"); } } }