Mercurial > hg > graal-jvmci-8
view test/compiler/loopopts/UseCountedLoopSafepoints.java @ 23787:fcffda51e6fe
-XX:+JVMCIPrintProperties should exit after printing (JDK-8168295)
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 19 Oct 2016 20:22:48 +0200 |
parents | cf93dd06db0f |
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/* * Copyright (c) 2015, Oracle and/or its affiliates. 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 * @bug 6869327 * @summary Test that C2 flag UseCountedLoopSafepoints ensures a safepoint is kept in a CountedLoop * @library /testlibrary * @run main UseCountedLoopSafepoints */ import java.util.concurrent.atomic.AtomicLong; import com.oracle.java.testlibrary.ProcessTools; import com.oracle.java.testlibrary.OutputAnalyzer; public class UseCountedLoopSafepoints { private static final AtomicLong _num = new AtomicLong(0); // Uses the fact that an EnableBiasedLocking vmop will be started // after 500ms, while we are still in the loop. If there is a // safepoint in the counted loop, then we will reach safepoint // very quickly. Otherwise SafepointTimeout will be hit. public static void main (String args[]) throws Exception { if (args.length == 1) { final int loops = Integer.parseInt(args[0]); for (int i = 0; i < loops; i++) { _num.addAndGet(1); } } else { ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( "-XX:+IgnoreUnrecognizedVMOptions", "-XX:-TieredCompilation", "-XX:+UseBiasedLocking", "-XX:BiasedLockingStartupDelay=500", "-XX:+SafepointTimeout", "-XX:SafepointTimeoutDelay=2000", "-XX:+UseCountedLoopSafepoints", "UseCountedLoopSafepoints", "2000000000" ); OutputAnalyzer output = new OutputAnalyzer(pb.start()); output.shouldNotContain("Timeout detected"); output.shouldHaveExitValue(0); } } }