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 C2: (x86 only) checks that java.lang.Runtime.onSpinWait is intrinsified 28 * @bug 8147844 29 * @library /testlibrary 30 * @requires os.arch=="x86" | os.arch=="amd64" | os.arch=="x86_64" 31 * @run main/othervm 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 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 42 "-XX:+IgnoreUnrecognizedVMOptions", "-showversion", 43 "-server", "-XX:-TieredCompilation", "-Xbatch", "-Xcomp", 44 "-XX:+PrintCompilation", "-XX:+UnlockDiagnosticVMOptions", 45 "-XX:+PrintInlining", "TestOnSpinWait$Launcher"); 46 47 OutputAnalyzer analyzer = new OutputAnalyzer(pb.start()); 48 49 analyzer.shouldHaveExitValue(0); 50 51 // The test is applicable only to C2 (present in Server VM). 52 if (analyzer.getStderr().contains("Server VM")) { 53 analyzer.shouldContain("java.lang.Runtime::onSpinWait (1 bytes) (intrinsic)"); 54 } 55 } 56 57 static class Launcher { 58 59 public static void main(final String[] args) throws Exception { 60 int end = 20_000; 61 62 for (int i=0; i < end; i++) { 63 java.lang.Runtime.onSpinWait(); 64 } 65 } 66 } 67 }