1 /*

     2  * Copyright (c) 2015, 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 8072008

    27  * @library /testlibrary /../../test/lib

    28  * @build GCTest NonInlinedReinvoker

    29  * @run main ClassFileInstaller sun.hotspot.WhiteBox

    30  *                              sun.hotspot.WhiteBox$WhiteBoxPermission

    31  *                              java.lang.invoke.GCTest

    32  *                              java.lang.invoke.GCTest$T

    33  *                              java.lang.invoke.NonInlinedReinvoker

    34  *                              jdk.test.lib.Asserts

    35  * @run main/othervm -Xbootclasspath/a:. -XX:+IgnoreUnrecognizedVMOptions

    36  *                   -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI

    37  *                   -Xbatch -XX:-TieredCompilation -XX:CICompilerCount=1

    38  *                      java.lang.invoke.GCTest

    39  */

    40 package java.lang.invoke;

    41 

    42 import sun.hotspot.WhiteBox;

    43 

    44 import java.lang.ref.*;

    45 import static jdk.test.lib.Asserts.*;

    46 

    47 public class GCTest {

    48     static final MethodHandles.Lookup LOOKUP = MethodHandles.Lookup.IMPL_LOOKUP;

    49 

    50     static class T {

    51         static int f1() { return 0; }

    52         static int f2() { return 1; }

    53     }

    54 

    55     static @Stable MethodHandle mh;

    56     static PhantomReference<LambdaForm> lform;

    57 

    58     static final ReferenceQueue<LambdaForm> rq = new ReferenceQueue<>();

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

    60 

    61     @DontInline

    62     static int invokeBasic() {

    63         try {

    64             return (int) mh.invokeBasic();

    65         } catch (Throwable e) {

    66             throw new Error(e);

    67         }

    68     }

    69 

    70     static void test(int expected) {

    71         for (int i = 0; i < 20_000; i++) {

    72             invokeBasic();

    73         }

    74         assertEquals(invokeBasic(), expected);

    75     }

    76 

    77     public static void main(String[] args) throws Exception {

    78         mh = NonInlinedReinvoker.make(

    79                 LOOKUP.findStatic(T.class, "f1", MethodType.methodType(int.class)));

    80 

    81         // Monitor LambdaForm GC

    82         lform = new PhantomReference<>(mh.form, rq);

    83 

    84         test(0);

    85         WB.clearInlineCaches();

    86         test(0);

    87 

    88         mh = NonInlinedReinvoker.make(

    89                 LOOKUP.findStatic(T.class, "f2", MethodType.methodType(int.class)));

    90 

    91         Reference<?> ref = null;

    92         while (ref == null) {

    93             WB.fullGC();

    94             try {

    95                 ref = rq.remove(1000);

    96             } catch (InterruptedException e) { /*ignore*/ }

    97         }

    98 

    99         test(1);

   100         WB.clearInlineCaches();

   101         test(1);

   102 

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

   104     }

   105 }