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