1 /*

     2  * Copyright (c) 2016, 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 8067247

    27  * @library /test/lib /compiler/whitebox /

    28  * @run main/bootclasspath -Xcomp -Xbatch

    29  *      -XX:CompileCommand=compileonly,InvokerGC::test

    30  *      -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI

    31  *      InvokerGC

    32  */

    33 

    34 import java.lang.invoke.*;

    35 import sun.hotspot.WhiteBox;

    36 

    37 public class InvokerGC {

    38     static final WhiteBox WB = WhiteBox.getWhiteBox();

    39 

    40     static MethodHandle mh;

    41     static {

    42         try {

    43             mh = MethodHandles.lookup().findStatic(InvokerGC.class, "dummy", MethodType.methodType(void.class));

    44         } catch (Exception e) {

    45             throw new Error(e);

    46         }

    47     }

    48 

    49     static void dummy() {}

    50 

    51     static void test() {

    52         try {

    53             mh.invoke();

    54         } catch (Throwable e) {

    55             throw new Error(e);

    56         }

    57     }

    58 

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

    60         mh.invoke(); // Pre-generate an invoker for ()V signature

    61 

    62         test(); // trigger method compilation

    63         test();

    64 

    65         WB.fullGC(); // WB.fullGC has always clear softref policy.

    66 

    67         test();

    68 

    69         WB.clearInlineCaches(true); // Preserve static stubs.

    70 

    71         test(); // Trigger call site re-resolution. Invoker LambdaForm should stay the same.

    72 

    73         System.out.println("TEST PASSED");

    74     }

    75 }