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 }