1 /*

     2  * Copyright (c) 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  * @test

    26  * @bug 8225325

    27  * @summary Add tests for redefining a class' private method during resolution of the bootstrap specifier

    28  * @library /test/lib

    29  * @modules java.base/jdk.internal.misc

    30  * @modules java.compiler

    31  *          java.instrument

    32  *          jdk.jartool/sun.tools.jar

    33  * @compile ../NamedBuffer.java

    34  * @compile redef/Xost.java

    35  * @run main RedefineClassHelper

    36  * @run main/othervm -javaagent:redefineagent.jar -Xlog:redefine+class*=trace RedefineInterfaceMethods

    37  */

    38 

    39 class Host {

    40     static void log(String msg) { System.out.println(msg); }

    41 

    42     static interface B {

    43         int ORIGINAL_RETURN = 1;

    44         int NEW_RETURN = 2;

    45 

    46         private int privateMethod() {

    47             Runnable race1 = () -> log("Hello from inside privateMethod");

    48             race1.run();

    49             return ORIGINAL_RETURN;

    50         }

    51 

    52         public default int defaultMethod(String p) {

    53             log(p + "from interface B's defaultMethod");

    54             return privateMethod();

    55         }

    56     }

    57 

    58     static class Impl implements B {

    59     }

    60 }

    61 

    62 public class RedefineInterfaceMethods {

    63     private static byte[] bytesForHostClass(char replace) throws Throwable {

    64         return NamedBuffer.bytesForHostClass(replace, "Host$B");

    65     }

    66 

    67     public static void main(String[] args) throws Throwable {

    68         Host.Impl impl = new Host.Impl();

    69 

    70         int res = impl.defaultMethod("Hello ");

    71         if (res != Host.B.ORIGINAL_RETURN)

    72             throw new Error("defaultMethod returned " + res +

    73                             " expected " + Host.B.ORIGINAL_RETURN);

    74 

    75         byte[] buf = bytesForHostClass('X');

    76         RedefineClassHelper.redefineClass(Host.B.class, buf);

    77 

    78         res = impl.defaultMethod("Goodbye ");

    79         if (res != Host.B.NEW_RETURN)

    80             throw new Error("defaultMethod returned " + res +

    81                             " expected " + Host.B.NEW_RETURN);

    82     }

    83 }