/*

 * Copyright (c) 2016, 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.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 * questions.

 */

/**

 * @test

 * @library /testlibrary

 * @run main ContinuousCallSiteTargetChange

 */

import java.lang.invoke.*;

import jdk.test.lib.*;

public class ContinuousCallSiteTargetChange {

    static void testServer() throws Exception {

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(

                "-XX:+IgnoreUnrecognizedVMOptions",

                "-server", "-XX:-TieredCompilation", "-Xbatch",

                "-XX:PerBytecodeRecompilationCutoff=10", "-XX:PerMethodRecompilationCutoff=10",

                "-XX:+PrintCompilation", "-XX:+UnlockDiagnosticVMOptions", "-XX:+PrintInlining",

                "ContinuousCallSiteTargetChange$Test", "100");

        OutputAnalyzer analyzer = new OutputAnalyzer(pb.start());

        analyzer.shouldHaveExitValue(0);

        analyzer.shouldNotContain("made not compilable");

        analyzer.shouldNotContain("decompile_count > PerMethodRecompilationCutoff");

    }

    static void testClient() throws Exception {

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(

                "-XX:+IgnoreUnrecognizedVMOptions",

                "-client", "-XX:+TieredCompilation", "-XX:TieredStopAtLevel=1", "-Xbatch",

                "-XX:PerBytecodeRecompilationCutoff=10", "-XX:PerMethodRecompilationCutoff=10",

                "-XX:+PrintCompilation", "-XX:+UnlockDiagnosticVMOptions", "-XX:+PrintInlining",

                "ContinuousCallSiteTargetChange$Test", "100");

        OutputAnalyzer analyzer = new OutputAnalyzer(pb.start());

        analyzer.shouldHaveExitValue(0);

        analyzer.shouldNotContain("made not compilable");

        analyzer.shouldNotContain("decompile_count > PerMethodRecompilationCutoff");

    }

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

        testServer();

        testClient();

    }

    static class Test {

        static final MethodType mt = MethodType.methodType(void.class);

        static final CallSite cs = new MutableCallSite(mt);

        static final MethodHandle mh = cs.dynamicInvoker();

        static void f() {

        }

        static void test1() throws Throwable {

            mh.invokeExact();

        }

        static void test2() throws Throwable {

            cs.getTarget().invokeExact();

        }

        static void iteration() throws Throwable {

            MethodHandle mh1 = MethodHandles.lookup().findStatic(ContinuousCallSiteTargetChange.Test.class, "f", mt);

            cs.setTarget(mh1);

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

                test1();

                test2();

            }

        }

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

            int iterations = Integer.parseInt(args[0]);

            for (int i = 0; i < iterations; i++) {

                iteration();

            }

        }

    }

}