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annotate test/compiler/loopopts/UseCountedLoopSafepoints.java @ 23817:c9035b8e388b

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8147645: get_ctrl_no_update() code is wrong Summary: Array.fill intrinsification code doesn't mark replaced control as dead Reviewed-by: kvn
author roland
date Wed, 03 Feb 2016 10:58:50 +0100
parents cf93dd06db0f
children
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1 /*
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2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 /**
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26 * @test
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27 * @bug 6869327
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28 * @summary Test that C2 flag UseCountedLoopSafepoints ensures a safepoint is kept in a CountedLoop
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29 * @library /testlibrary
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30 * @run main UseCountedLoopSafepoints
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31 */
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32
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33 import java.util.concurrent.atomic.AtomicLong;
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34 import com.oracle.java.testlibrary.ProcessTools;
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35 import com.oracle.java.testlibrary.OutputAnalyzer;
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36
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37 public class UseCountedLoopSafepoints {
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38 private static final AtomicLong _num = new AtomicLong(0);
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39
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40 // Uses the fact that an EnableBiasedLocking vmop will be started
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41 // after 500ms, while we are still in the loop. If there is a
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42 // safepoint in the counted loop, then we will reach safepoint
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43 // very quickly. Otherwise SafepointTimeout will be hit.
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44 public static void main (String args[]) throws Exception {
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45 if (args.length == 1) {
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46 final int loops = Integer.parseInt(args[0]);
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47 for (int i = 0; i < loops; i++) {
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48 _num.addAndGet(1);
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49 }
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50 } else {
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51 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
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52 "-XX:+IgnoreUnrecognizedVMOptions",
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53 "-XX:-TieredCompilation",
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54 "-XX:+UseBiasedLocking",
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55 "-XX:BiasedLockingStartupDelay=500",
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56 "-XX:+SafepointTimeout",
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57 "-XX:SafepointTimeoutDelay=2000",
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58 "-XX:+UseCountedLoopSafepoints",
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59 "UseCountedLoopSafepoints",
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60 "2000000000"
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61 );
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62 OutputAnalyzer output = new OutputAnalyzer(pb.start());
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63 output.shouldNotContain("Timeout detected");
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64 output.shouldHaveExitValue(0);
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65 }
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66 }
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67 }