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.

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    23 

    24 /*

    25  * @test

    26  * @bug 8195650

    27  * @summary Test linking of method references to VarHandle access methods.

    28  * @run testng VarHandleMethodReferenceTest

    29  */

    30 

    31 import org.testng.annotations.Test;

    32 

    33 import java.lang.invoke.*;

    34 

    35 public class VarHandleMethodReferenceTest {

    36 

    37   interface R {

    38       void apply();

    39   }

    40 

    41   @Test

    42   public void testMethodReferences() {

    43       VarHandle vh = MethodHandles.arrayElementVarHandle(int[].class);

    44 

    45       // The compilation of these method references will result in the

    46       // placement of MethodHandles in the constant pool that reference

    47       // VarHandle signature polymorphic methods.

    48       // When those constant method handles are loaded the VarHandle invoker

    49       // mechanism will be used where the first argument to invocation will be

    50       // the bound VarHandle instance

    51 

    52       // VarHandle invokers are tested by other test classes so here it

    53       // is just necessary to check that functional objects can be successfully

    54       // obtained, it does not matter about the signature of the functional

    55       // interface

    56 

    57       R r;

    58       r = vh::get;

    59       r = vh::set;

    60       r = vh::getVolatile;

    61       r = vh::setVolatile;

    62       r = vh::getOpaque;

    63       r = vh::setOpaque;

    64       r = vh::getAcquire;

    65       r = vh::setRelease;

    66 

    67       r = vh::compareAndSet;

    68       r = vh::compareAndExchange;

    69       r = vh::compareAndExchangeAcquire;

    70       r = vh::compareAndExchangeRelease;

    71       r = vh::weakCompareAndSetPlain;

    72       r = vh::weakCompareAndSet;

    73       r = vh::weakCompareAndSetAcquire;

    74       r = vh::weakCompareAndSetRelease;

    75 

    76       r = vh::getAndSet;

    77       r = vh::getAndSetAcquire;

    78       r = vh::getAndSetRelease;

    79       r = vh::getAndAdd;

    80       r = vh::getAndAddAcquire;

    81       r = vh::getAndAddRelease;

    82       r = vh::getAndBitwiseOr;

    83       r = vh::getAndBitwiseOrAcquire;

    84       r = vh::getAndBitwiseOrRelease;

    85       r = vh::getAndBitwiseAnd;

    86       r = vh::getAndBitwiseAndAcquire;

    87       r = vh::getAndBitwiseAndRelease;

    88       r = vh::getAndBitwiseXor;

    89       r = vh::getAndBitwiseXorAcquire;

    90       r = vh::getAndBitwiseXorRelease;

    91   }

    92 }