1 /*

     2  * Copyright (c) 2015, 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 TestOnSpinWait

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

    28  * @bug 8147844

    29  * @library /testlibrary

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

    31  * @run main TestOnSpinWait

    32  */

    33 

    34 import java.lang.invoke.*;

    35 import jdk.test.lib.*;

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

    37 

    38 public class TestOnSpinWait {

    39 

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

    41 

    42         // Test C1 compiler

    43         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(

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

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

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

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

    48 

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

    50 

    51         analyzer.shouldHaveExitValue(0);

    52 

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

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

    55 

    56         // Test C2 compiler

    57         pb = ProcessTools.createJavaProcessBuilder(

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

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

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

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

    62 

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

    64 

    65         analyzer.shouldHaveExitValue(0);

    66 

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

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

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

    70         }

    71     }

    72 

    73     static class Launcher {

    74 

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

    76             int end = 20_000;

    77 

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

    79                 test();

    80             }

    81         }

    82         static void test() {

    83             java.lang.Thread.onSpinWait();

    84         }

    85     }

    86 }