Mercurial > hg > truffle
annotate test/gc/g1/TestDeferredRSUpdate.java @ 20256:b0b97602393a
8033923: Use BufferingOopClosure for G1 code root scanning
Reviewed-by: mgerdin, brutisso
author | stefank |
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date | Mon, 10 Feb 2014 12:58:09 +0100 |
parents | cd43876f692e |
children | e8ba50da0de0 |
rev | line source |
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1 /* |
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2 * Copyright (c) 2014, 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 * @test TestDeferredRSUpdate |
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26 * @bug 8040977 |
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27 * @summary Ensure that running with -XX:-G1DeferredRSUpdate does not crash the VM |
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28 * @key gc |
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29 * @library /testlibrary |
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30 */ |
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31 |
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32 import com.oracle.java.testlibrary.ProcessTools; |
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33 import com.oracle.java.testlibrary.OutputAnalyzer; |
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34 |
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35 public class TestDeferredRSUpdate { |
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36 public static void main(String[] args) throws Exception { |
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37 GCTest.main(args); |
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38 |
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39 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC", |
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40 "-Xmx10M", |
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41 // G1DeferredRSUpdate is a develop option, but we cannot limit execution of this test to only debug VMs. |
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42 "-XX:+IgnoreUnrecognizedVMOptions", |
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43 "-XX:-G1DeferredRSUpdate", |
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44 GCTest.class.getName()); |
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45 |
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46 OutputAnalyzer output = new OutputAnalyzer(pb.start()); |
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47 output.shouldHaveExitValue(0); |
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48 } |
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49 |
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50 static class GCTest { |
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51 private static Object[] garbage = new Object[32]; |
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52 |
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53 public static void main(String [] args) { |
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54 System.out.println("Creating garbage"); |
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55 // Create 128MB of garbage. This should result in at least one minor GC, with |
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56 // some objects copied to old gen. As references from old to young are installed, |
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57 // the crash due to the use before initialize occurs. |
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58 Object prev = null; |
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59 Object prevPrev = null; |
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60 for (int i = 0; i < 1024; i++) { |
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61 Object[] next = new Object[32 * 1024]; |
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62 next[0] = prev; |
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63 next[1] = prevPrev; |
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64 |
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65 Object[] cur = (Object[]) garbage[i % garbage.length]; |
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66 if (cur != null) { |
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67 cur[0] = null; |
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68 cur[1] = null; |
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69 } |
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70 garbage[i % garbage.length] = next; |
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71 |
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72 prevPrev = prev; |
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73 prev = next; |
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74 } |
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75 System.out.println("Done"); |
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76 } |
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77 } |
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78 } |