1 /*

     2  * Copyright (c) 2015, 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 8072008

    27  * @requires vm.opt.final.ClassUnloading

    28  * @library /test/lib ../patches

    29  * @modules java.base/jdk.internal.misc

    30  *          java.base/jdk.internal.vm.annotation

    31  *

    32  * @build java.base/java.lang.invoke.MethodHandleHelper

    33  * @build sun.hotspot.WhiteBox

    34  * @run main/bootclasspath/othervm -XX:+IgnoreUnrecognizedVMOptions

    35  *                                 -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI

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

    37  *                                 -XX:+FoldStableValues

    38  *                                 compiler.jsr292.NonInlinedCall.GCTest

    39  */

    40 

    41 package compiler.jsr292.NonInlinedCall;

    42 

    43 import jdk.internal.vm.annotation.DontInline;

    44 import jdk.internal.vm.annotation.Stable;

    45 import sun.hotspot.WhiteBox;

    46 

    47 import java.lang.invoke.MethodHandle;

    48 import java.lang.invoke.MethodHandleHelper;

    49 import java.lang.invoke.MethodHandleHelper.NonInlinedReinvoker;

    50 import java.lang.invoke.MethodHandles;

    51 import java.lang.invoke.MethodType;

    52 import java.lang.ref.PhantomReference;

    53 import java.lang.ref.Reference;

    54 import java.lang.ref.ReferenceQueue;

    55 

    56 import static jdk.test.lib.Asserts.assertEquals;

    57 

    58 public class GCTest {

    59     static final MethodHandles.Lookup LOOKUP = MethodHandleHelper.IMPL_LOOKUP;

    60 

    61     static class T {

    62         static int f1() { return 0; }

    63         static int f2() { return 1; }

    64     }

    65 

    66     static @Stable MethodHandle mh;

    67     static PhantomReference<Object> lform;

    68 

    69     static final ReferenceQueue<Object> rq = new ReferenceQueue<>();

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

    71 

    72     @DontInline

    73     static int invokeBasic() {

    74         try {

    75             return MethodHandleHelper.invokeBasicI(mh);

    76         } catch (Throwable e) {

    77             throw new Error(e);

    78         }

    79     }

    80 

    81     static void test(int expected) {

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

    83             invokeBasic();

    84         }

    85         assertEquals(invokeBasic(), expected);

    86     }

    87 

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

    89         mh = NonInlinedReinvoker.make(

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

    91 

    92         // Monitor LambdaForm GC

    93         lform = new PhantomReference<>(MethodHandleHelper.getLambdaForm(mh), rq);

    94 

    95         test(0);

    96         WB.clearInlineCaches();

    97         test(0);

    98 

    99         mh = NonInlinedReinvoker.make(

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

   101 

   102         Reference<?> ref = null;

   103         while (ref == null) {

   104             WB.fullGC();

   105             try {

   106                 ref = rq.remove(1000);

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

   108         }

   109 

   110         test(1);

   111         WB.clearInlineCaches();

   112         test(1);

   113 

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

   115     }

   116 }