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  * @modules java.base/jdk.internal.misc
  31  * @requires os.arch=="x86" | os.arch=="amd64" | os.arch=="x86_64"
  32  * @run driver compiler.onSpinWait.TestOnSpinWait
  33  */
  34 
  35 package compiler.onSpinWait;
  36 
  37 import jdk.test.lib.OutputAnalyzer;
  38 import jdk.test.lib.ProcessTools;
  39 
  40 public class TestOnSpinWait {
  41 
  42     public static void main(String[] args) throws Exception {
  43 
  44         // Test C1 compiler
  45         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  46           "-XX:+IgnoreUnrecognizedVMOptions", "-showversion",
  47           "-XX:+TieredCompilation", "-XX:TieredStopAtLevel=1", "-Xbatch",
  48           "-XX:+PrintCompilation", "-XX:+UnlockDiagnosticVMOptions",
  49           "-XX:+PrintInlining", Launcher.class.getName());
  50 
  51         OutputAnalyzer analyzer = new OutputAnalyzer(pb.start());
  52 
  53         analyzer.shouldHaveExitValue(0);
  54 
  55         // The test is applicable only to C1 (present in Server VM).
  56         analyzer.shouldContain("java.lang.Thread::onSpinWait (1 bytes)   intrinsic");
  57 
  58         // Test C2 compiler
  59         pb = ProcessTools.createJavaProcessBuilder(
  60           "-XX:+IgnoreUnrecognizedVMOptions", "-showversion",
  61           "-XX:-TieredCompilation", "-Xbatch",
  62           "-XX:+PrintCompilation", "-XX:+UnlockDiagnosticVMOptions",
  63           "-XX:+PrintInlining", Launcher.class.getName());
  64 
  65         analyzer = new OutputAnalyzer(pb.start());
  66 
  67         analyzer.shouldHaveExitValue(0);
  68 
  69         // The test is applicable only to C2 (present in Server VM).
  70         if (analyzer.getStderr().contains("Server VM")) {
  71             analyzer.shouldContain("java.lang.Thread::onSpinWait (1 bytes)   (intrinsic)");
  72         }
  73     }
  74 
  75     static class Launcher {
  76 
  77         public static void main(final String[] args) throws Exception {
  78             int end = 20_000;
  79 
  80             for (int i=0; i < end; i++) {
  81                 test();
  82             }
  83         }
  84         static void test() {
  85             java.lang.Thread.onSpinWait();
  86         }
  87     }
  88 }