1 /*

     2  * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.

     3  * Copyright 2016 Azul Systems, Inc.  All Rights Reserved.

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

     5  *

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

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

     8  * published by the Free Software Foundation.

     9  *

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

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

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

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

    14  * accompanied this code).

    15  *

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

    17  * 2 along with this work; if not, write to the Free Software Foundation,

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

    19  *

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

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

    22  * questions.

    23  */

    24 

    25 /**

    26  * @test TestOnSpinWaitC1

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

    28  * @bug 8147844

    29  * @library /test/lib

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

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

    32  * @requires vm.compiler1.enabled

    33  * @run driver compiler.onSpinWait.TestOnSpinWait

    34  */

    35 

    36 package compiler.onSpinWait;

    37 

    38 import jdk.test.lib.process.OutputAnalyzer;

    39 import jdk.test.lib.process.ProcessTools;

    40 

    41 public class TestOnSpinWaitC1 {

    42 

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

    44 

    45         // Test C1 compiler

    46         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(

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

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

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

    50           "-XX:+PrintInlining", Launcher.class.getName());

    51 

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

    53 

    54         analyzer.shouldHaveExitValue(0);

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

    56     }

    57 

    58     static class Launcher {

    59 

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

    61             int end = 20_000;

    62 

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

    64                 test();

    65             }

    66         }

    67         static void test() {

    68             java.lang.Thread.onSpinWait();

    69         }

    70     }

    71 }