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 }