TestOnSpinWait.java revision 11833:1cbffa2beba6 
1/*
2 * Copyright (c) 2015, 2016, 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
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23 */
24
25/**
26 * @test TestOnSpinWait
27 * @summary (x86 only) checks that java.lang.Thread.onSpinWait is intrinsified
28 * @bug 8147844
29 * @library /test/lib
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
35package compiler.onSpinWait;
36
37import jdk.test.lib.process.OutputAnalyzer;
38import jdk.test.lib.process.ProcessTools;
39
40public 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}
89