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annotate test/gc/class_unloading/TestCMSClassUnloadingEnabledHWM.java @ 20282:f3aeae1f9fc5

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8048269: Add flag to turn off class unloading after G1 concurrent mark Summary: Added -XX:+/-ClassUnloadingWithConcurrentMark Reviewed-by: jmasa, brutisso, mgerdin
author stefank
date Wed, 06 Aug 2014 09:55:16 +0200
parents
children 8a7429682242
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20282
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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
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26 * @key gc
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27 * @bug 8049831
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28 * @library /testlibrary /testlibrary/whitebox
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29 * @build TestCMSClassUnloadingEnabledHWM AllocateBeyondMetaspaceSize
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30 * @run main ClassFileInstaller sun.hotspot.WhiteBox
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31 * @run driver TestCMSClassUnloadingEnabledHWM
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32 * @summary Test that -XX:-CMSClassUnloadingEnabled will trigger a Full GC when more than MetaspaceSize metadata is allocated.
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33 */
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34
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35 import com.oracle.java.testlibrary.OutputAnalyzer;
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36 import com.oracle.java.testlibrary.ProcessTools;
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37
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38 import java.util.ArrayList;
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39 import java.util.Arrays;
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40
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41 public class TestCMSClassUnloadingEnabledHWM {
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42 private static long MetaspaceSize = 32 * 1024 * 1024;
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43 private static long YoungGenSize = 32 * 1024 * 1024;
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44
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45 private static OutputAnalyzer run(boolean enableUnloading) throws Exception {
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46 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
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47 "-Xbootclasspath/a:.",
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48 "-XX:+WhiteBoxAPI",
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49 "-XX:MetaspaceSize=" + MetaspaceSize,
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50 "-Xmn" + YoungGenSize,
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51 "-XX:+UseConcMarkSweepGC",
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52 "-XX:" + (enableUnloading ? "+" : "-") + "CMSClassUnloadingEnabled",
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53 "-XX:+PrintHeapAtGC",
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54 "-XX:+PrintGCDetails",
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55 "AllocateBeyondMetaspaceSize",
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56 "" + MetaspaceSize,
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57 "" + YoungGenSize);
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58 return new OutputAnalyzer(pb.start());
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59 }
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60
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61 public static OutputAnalyzer runWithCMSClassUnloading() throws Exception {
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62 return run(true);
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63 }
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64
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65 public static OutputAnalyzer runWithoutCMSClassUnloading() throws Exception {
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66 return run(false);
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67 }
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68
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69 public static void testWithoutCMSClassUnloading() throws Exception {
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70 // -XX:-CMSClassUnloadingEnabled is used, so we expect a full GC instead of a concurrent cycle.
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71 OutputAnalyzer out = runWithoutCMSClassUnloading();
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72
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73 out.shouldMatch(".*Full GC.*");
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74 out.shouldNotMatch(".*CMS Initial Mark.*");
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75 }
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76
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77 public static void testWithCMSClassUnloading() throws Exception {
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78 // -XX:+CMSClassUnloadingEnabled is used, so we expect a concurrent cycle instead of a full GC.
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79 OutputAnalyzer out = runWithCMSClassUnloading();
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80
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81 out.shouldMatch(".*CMS Initial Mark.*");
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82 out.shouldNotMatch(".*Full GC.*");
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83 }
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84
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85 public static void main(String args[]) throws Exception {
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86 testWithCMSClassUnloading();
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87 testWithoutCMSClassUnloading();
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88 }
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89 }
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90