/*

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

 * Copyright 2016 Azul Systems, Inc.  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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/**

 * @test TestOnSpinWait

 * @summary (x86 only) checks that java.lang.Thread.onSpinWait is intrinsified

 * @bug 8147844

 * @library /testlibrary

 * @requires os.arch=="x86" | os.arch=="amd64" | os.arch=="x86_64"

 * @run main TestOnSpinWait

 */

import java.lang.invoke.*;

import jdk.test.lib.*;

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

public class TestOnSpinWait {

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

        // Test C1 compiler

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(

          "-XX:+IgnoreUnrecognizedVMOptions", "-showversion",

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

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

          "-XX:+PrintInlining", "TestOnSpinWait$Launcher");

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

        analyzer.shouldHaveExitValue(0);

        // The test is applicable only to C1 (present in Server VM).

        analyzer.shouldContain("java.lang.Thread::onSpinWait (1 bytes)   intrinsic");

        // Test C2 compiler

        pb = ProcessTools.createJavaProcessBuilder(

          "-XX:+IgnoreUnrecognizedVMOptions", "-showversion",

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

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

          "-XX:+PrintInlining", "TestOnSpinWait$Launcher");

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

        analyzer.shouldHaveExitValue(0);

        // The test is applicable only to C2 (present in Server VM).

        if (analyzer.getStderr().contains("Server VM")) {

            analyzer.shouldContain("java.lang.Thread::onSpinWait (1 bytes)   (intrinsic)");

        }

    }

    static class Launcher {

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

            int end = 20_000;

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

                test();

            }

        }

        static void test() {

            java.lang.Thread.onSpinWait();

        }

    }

}