--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/compiler/onSpinWait/TestOnSpinWait.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2015, 2016, 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 /test/lib
+ * @modules java.base/jdk.internal.misc
+ * @requires os.arch=="x86" | os.arch=="amd64" | os.arch=="x86_64"
+ * @run driver compiler.onSpinWait.TestOnSpinWait
+ */
+
+package compiler.onSpinWait;
+
+import jdk.test.lib.process.OutputAnalyzer;
+import jdk.test.lib.process.ProcessTools;
+
+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", Launcher.class.getName());
+
+ 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", Launcher.class.getName());
+
+ 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();
+ }
+ }
+}