1 /*

     2  * Copyright (c) 2018, 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 8200167 8010319

    27  * @summary Regression test for a bug introduced in 8200167 and fixed in 8010319

    28  * @run main FinalVirtualCallFromInterface

    29  */

    30 

    31 import java.lang.invoke.*;

    32 

    33 /*

    34  * Test that a MethodHandle for a final method, called from an interface, works correctly.

    35  * With only 8200167 applied this fails with:

    36  * Exception in thread "main" java.lang.InternalError: Should only be invoked on a subclass

    37  *        at

    38  * java.base/java.lang.invoke.DirectMethodHandle.checkReceiver(DirectMethodHandle.java:441)

    39  *

    40  * The nestmate update under 8010319 fixes that bug.

    41  */

    42 public class FinalVirtualCallFromInterface {

    43 

    44     static class Final {

    45         public final void fm() {}

    46     }

    47 

    48     static interface FinalUser {

    49         static void test() throws Throwable {

    50             MethodType mt = MethodType.methodType(void.class);

    51             MethodHandle mh = MethodHandles.lookup().findVirtual(Final.class, "fm", mt);

    52             Final f = new Final();

    53             mh.invokeExact(f);

    54             mh.invoke(f);

    55         }

    56     }

    57 

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

    59         FinalUser.test();

    60     }

    61 }