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  * @modules java.base/jdk.internal.misc
  30  * @library /testlibrary
  31  * @requires os.arch=="x86" | os.arch=="amd64" | os.arch=="x86_64"
  32  * @run main TestOnSpinWait
  33  */
  34 
  35 import java.lang.invoke.*;
  36 import jdk.test.lib.*;
  37 import static jdk.test.lib.Asserts.*;
  38 
  39 public class TestOnSpinWait {
  40 
  41     public static void main(String[] args) throws Exception {
  42 
  43         // Test C1 compiler
  44         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  45           "-XX:+IgnoreUnrecognizedVMOptions", "-showversion",
  46           "-XX:+TieredCompilation", "-XX:TieredStopAtLevel=1", "-Xbatch",
  47           "-XX:+PrintCompilation", "-XX:+UnlockDiagnosticVMOptions",
  48           "-XX:+PrintInlining", "TestOnSpinWait$Launcher");
  49 
  50         OutputAnalyzer analyzer = new OutputAnalyzer(pb.start());
  51 
  52         analyzer.shouldHaveExitValue(0);
  53 
  54         // The test is applicable only to C1 (present in Server VM).
  55         analyzer.shouldContain("java.lang.Thread::onSpinWait (1 bytes)   intrinsic");
  56 
  57         // Test C2 compiler
  58         pb = ProcessTools.createJavaProcessBuilder(
  59           "-XX:+IgnoreUnrecognizedVMOptions", "-showversion",
  60           "-XX:-TieredCompilation", "-Xbatch",
  61           "-XX:+PrintCompilation", "-XX:+UnlockDiagnosticVMOptions",
  62           "-XX:+PrintInlining", "TestOnSpinWait$Launcher");
  63 
  64         analyzer = new OutputAnalyzer(pb.start());
  65 
  66         analyzer.shouldHaveExitValue(0);
  67 
  68         // The test is applicable only to C2 (present in Server VM).
  69         if (analyzer.getStderr().contains("Server VM")) {
  70             analyzer.shouldContain("java.lang.Thread::onSpinWait (1 bytes)   (intrinsic)");
  71         }
  72     }
  73 
  74     static class Launcher {
  75 
  76         public static void main(final String[] args) throws Exception {
  77             int end = 20_000;
  78 
  79             for (int i=0; i < end; i++) {
  80                 test();
  81             }
  82         }
  83         static void test() {
  84             java.lang.Thread.onSpinWait();
  85         }
  86     }
  87 }