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 }