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

 *

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 * 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 ../patches

 * @modules java.base/jdk.internal.vm.annotation

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

 * @build sun.hotspot.WhiteBox

 *                         -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI

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

 *                         -XX:+FoldStableValues

 *                         compiler.jsr292.NonInlinedCall.GCTest

 */

package compiler.jsr292.NonInlinedCall;

import java.lang.invoke.MethodHandleHelper;

import java.lang.invoke.MethodHandleHelper.NonInlinedReinvoker;

import java.lang.invoke.MethodHandles;

import java.lang.invoke.MethodHandle;

import java.lang.invoke.MethodType;

import java.lang.ref.PhantomReference;

import java.lang.ref.Reference;

import java.lang.ref.ReferenceQueue;

import jdk.internal.vm.annotation.DontInline;

import jdk.internal.vm.annotation.Stable;

import sun.hotspot.WhiteBox;

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

public class GCTest {

    static final MethodHandles.Lookup LOOKUP = MethodHandleHelper.IMPL_LOOKUP;

    static class T {

        static int f1() { return 0; }

        static int f2() { return 1; }

    }

    static @Stable MethodHandle mh;

    static PhantomReference<Object> lform;

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

    static final WhiteBox WB = WhiteBox.getWhiteBox();

    @DontInline

    static int invokeBasic() {

        try {

            return MethodHandleHelper.invokeBasicI(mh);

        } 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<>(MethodHandleHelper.getLambdaForm(mh), 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");

    }

}