10971
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1 /*
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2 * Copyright (c) 2013, 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 CdsSameObjectAlignment
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26 * @summary Testing CDS (class data sharing) using varying object alignment.
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27 * Using same object alignment for each dump/load pair
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28 * @library /testlibrary
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29 */
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30
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31 import com.oracle.java.testlibrary.*;
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32
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33 public class CdsSameObjectAlignment {
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34 public static void main(String[] args) throws Exception {
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35 String nativeWordSize = System.getProperty("sun.arch.data.model");
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36 if (!Platform.is64bit()) {
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37 System.out.println("ObjectAlignmentInBytes for CDS is only " +
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38 "supported on 64bit platforms; this plaform is " +
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39 nativeWordSize);
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40 System.out.println("Skipping the test");
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41 } else {
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42 dumpAndLoadSharedArchive(8);
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43 dumpAndLoadSharedArchive(16);
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44 dumpAndLoadSharedArchive(32);
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45 dumpAndLoadSharedArchive(64);
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46 }
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47 }
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48
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49 private static void
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50 dumpAndLoadSharedArchive(int objectAlignmentInBytes) throws Exception {
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51 String objectAlignmentArg = "-XX:ObjectAlignmentInBytes="
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52 + objectAlignmentInBytes;
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53 System.out.println("dumpAndLoadSharedArchive(): objectAlignmentInBytes = "
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54 + objectAlignmentInBytes);
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55
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56 // create shared archive
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57 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
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58 "-XX:+UnlockDiagnosticVMOptions",
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59 "-XX:SharedArchiveFile=./sample.jsa",
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60 "-Xshare:dump",
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61 objectAlignmentArg);
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62
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63 OutputAnalyzer output = new OutputAnalyzer(pb.start());
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64 output.shouldContain("Loading classes to share");
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65 output.shouldHaveExitValue(0);
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66
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67
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68 // run using the shared archive
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69 pb = ProcessTools.createJavaProcessBuilder(
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70 "-XX:+UnlockDiagnosticVMOptions",
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71 "-XX:SharedArchiveFile=./sample.jsa",
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72 "-Xshare:on",
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73 objectAlignmentArg,
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74 "-version");
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75
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76 output = new OutputAnalyzer(pb.start());
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77
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78 try {
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79 output.shouldContain("sharing");
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80 output.shouldHaveExitValue(0);
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81 } catch (RuntimeException e) {
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82 // CDS uses absolute addresses for performance.
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83 // It will try to reserve memory at a specific address;
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84 // there is a chance such reservation will fail
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85 // If it does, it is NOT considered a failure of the feature,
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86 // rather a possible expected outcome, though not likely
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87 output.shouldContain(
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88 "Unable to reserve shared space at required address");
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89 output.shouldHaveExitValue(1);
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90 }
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91 }
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92 }
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