70 lines
2.7 KiB
Java
70 lines
2.7 KiB
Java
/*
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* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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/**
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* @test
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* @bug 6869327
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* @summary Test that C2 flag UseCountedLoopSafepoints ensures a safepoint is kept in a CountedLoop
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* @library /testlibrary
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* @modules java.base
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* @ignore 8146096
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* @run main UseCountedLoopSafepoints
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*/
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import java.util.concurrent.atomic.AtomicLong;
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import jdk.test.lib.ProcessTools;
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import jdk.test.lib.OutputAnalyzer;
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public class UseCountedLoopSafepoints {
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private static final AtomicLong _num = new AtomicLong(0);
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// Uses the fact that an EnableBiasedLocking vmop will be started
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// after 500ms, while we are still in the loop. If there is a
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// safepoint in the counted loop, then we will reach safepoint
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// very quickly. Otherwise SafepointTimeout will be hit.
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public static void main (String args[]) throws Exception {
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if (args.length == 1) {
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final int loops = Integer.parseInt(args[0]);
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for (int i = 0; i < loops; i++) {
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_num.addAndGet(1);
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}
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} else {
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ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
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"-XX:+IgnoreUnrecognizedVMOptions",
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"-XX:-TieredCompilation",
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"-XX:+UseBiasedLocking",
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"-XX:BiasedLockingStartupDelay=500",
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"-XX:+SafepointTimeout",
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"-XX:SafepointTimeoutDelay=2000",
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"-XX:+UseCountedLoopSafepoints",
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"UseCountedLoopSafepoints",
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"2000000000"
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);
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OutputAnalyzer output = new OutputAnalyzer(pb.start());
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output.shouldNotContain("Timeout detected");
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output.shouldHaveExitValue(0);
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}
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}
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}
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