--- /dev/null 2016-04-01 00:36:15.000000000 +0300 +++ new/test/compiler/onSpinWait/TestOnSpinWait.java 2016-04-01 00:36:15.000000000 +0300 @@ -0,0 +1,86 @@ +/* + * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. + * Copyright 2016 Azul Systems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +/** + * @test TestOnSpinWait + * @summary (x86 only) checks that java.lang.Thread.onSpinWait is intrinsified + * @bug 8147844 + * @library /testlibrary + * @requires os.arch=="x86" | os.arch=="amd64" | os.arch=="x86_64" + * @run main TestOnSpinWait + */ + +import java.lang.invoke.*; +import jdk.test.lib.*; +import static jdk.test.lib.Asserts.*; + +public class TestOnSpinWait { + + public static void main(String[] args) throws Exception { + + // Test C1 compiler + ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( + "-XX:+IgnoreUnrecognizedVMOptions", "-showversion", + "-XX:+TieredCompilation", "-XX:TieredStopAtLevel=1", "-Xbatch", + "-XX:+PrintCompilation", "-XX:+UnlockDiagnosticVMOptions", + "-XX:+PrintInlining", "TestOnSpinWait$Launcher"); + + OutputAnalyzer analyzer = new OutputAnalyzer(pb.start()); + + analyzer.shouldHaveExitValue(0); + + // The test is applicable only to C1 (present in Server VM). + analyzer.shouldContain("java.lang.Thread::onSpinWait (1 bytes) intrinsic"); + + // Test C2 compiler + pb = ProcessTools.createJavaProcessBuilder( + "-XX:+IgnoreUnrecognizedVMOptions", "-showversion", + "-XX:-TieredCompilation", "-Xbatch", + "-XX:+PrintCompilation", "-XX:+UnlockDiagnosticVMOptions", + "-XX:+PrintInlining", "TestOnSpinWait$Launcher"); + + analyzer = new OutputAnalyzer(pb.start()); + + analyzer.shouldHaveExitValue(0); + + // The test is applicable only to C2 (present in Server VM). + if (analyzer.getStderr().contains("Server VM")) { + analyzer.shouldContain("java.lang.Thread::onSpinWait (1 bytes) (intrinsic)"); + } + } + + static class Launcher { + + public static void main(final String[] args) throws Exception { + int end = 20_000; + + for (int i=0; i < end; i++) { + test(); + } + } + static void test() { + java.lang.Thread.onSpinWait(); + } + } +}