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 }