/*

 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

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 */

/*

 * @test

 * @bug 8072008

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

 * @build GCTest NonInlinedReinvoker

 * @run main ClassFileInstaller sun.hotspot.WhiteBox

 *                              sun.hotspot.WhiteBox$WhiteBoxPermission

 *                              java.lang.invoke.GCTest

 *                              java.lang.invoke.GCTest$T

 *                              java.lang.invoke.NonInlinedReinvoker

 *                              jdk.test.lib.Asserts

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

 *                   -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI

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

 *                      java.lang.invoke.GCTest

 */

package java.lang.invoke;

import sun.hotspot.WhiteBox;

import java.lang.ref.*;

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

public class GCTest {

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

    static class T {

        static int f1() { return 0; }

        static int f2() { return 1; }

    }

    static @Stable MethodHandle mh;

    static PhantomReference<LambdaForm> lform;

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

    static final WhiteBox WB = WhiteBox.getWhiteBox();

    @DontInline

    static int invokeBasic() {

        try {

            return (int) mh.invokeBasic();

        } catch (Throwable e) {

            throw new Error(e);

        }

    }

    static void test(int expected) {

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

            invokeBasic();

        }

        assertEquals(invokeBasic(), expected);

    }

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

        mh = NonInlinedReinvoker.make(

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

        // Monitor LambdaForm GC

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

        test(0);

        WB.clearInlineCaches();

        test(0);

        mh = NonInlinedReinvoker.make(

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

        Reference<?> ref = null;

        while (ref == null) {

            WB.fullGC();

            try {

                ref = rq.remove(1000);

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

        }

        test(1);

        WB.clearInlineCaches();

        test(1);

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

    }

}