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annotate test/gc/metaspace/CompressedClassSpaceSizeInJmapHeap.java @ 12986:1b422ef5288a

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8025728: Missing volatile specifier for field G1AllocRegion::_alloc_region Summary: The field G1AllocRegion::_alloc_region needs to be declared volatile as it is used with that intention. Otherwise the compiler may generate the code that reloads the value which might have changed in the meantime, leading to spurious crashes. Reviewed-by: iveresov, simonis, tschatzl Contributed-by: Axel Siebenborn <axel.siebenborn@sap.com>
author tschatzl
date Wed, 23 Oct 2013 10:23:06 +0200
parents 7944aba7ba41
children
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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 CompressedClassSpaceSizeInJmapHeap
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26 * @bug 8004924
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27 * @summary Checks that jmap -heap contains the flag CompressedClassSpaceSize
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28 * @library /testlibrary
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29 * @run main/othervm -XX:CompressedClassSpaceSize=50m CompressedClassSpaceSizeInJmapHeap
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30 */
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31
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32 import com.oracle.java.testlibrary.*;
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33 import java.nio.file.*;
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34 import java.io.File;
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35 import java.nio.charset.Charset;
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36 import java.util.List;
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37
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38 public class CompressedClassSpaceSizeInJmapHeap {
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39 public static void main(String[] args) throws Exception {
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40 String pid = Integer.toString(ProcessTools.getProcessId());
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41
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42 JDKToolLauncher jmap = JDKToolLauncher.create("jmap")
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43 .addToolArg("-heap")
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44 .addToolArg(pid);
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45 ProcessBuilder pb = new ProcessBuilder(jmap.getCommand());
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46
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47 File out = new File("CompressedClassSpaceSizeInJmapHeap.stdout.txt");
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48 pb.redirectOutput(out);
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49
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50 File err = new File("CompressedClassSpaceSizeInJmapHeap.stderr.txt");
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51 pb.redirectError(err);
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52
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53 run(pb);
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54
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55 OutputAnalyzer output = new OutputAnalyzer(read(out));
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56 output.shouldContain("CompressedClassSpaceSize = 52428800 (50.0MB)");
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57 out.delete();
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58 }
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59
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60 private static void run(ProcessBuilder pb) throws Exception {
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61 Process p = pb.start();
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62 p.waitFor();
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63 int exitValue = p.exitValue();
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64 if (exitValue != 0) {
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65 throw new Exception("jmap -heap exited with error code: " + exitValue);
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66 }
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67 }
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68
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69 private static String read(File f) throws Exception {
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70 Path p = f.toPath();
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71 List<String> lines = Files.readAllLines(p, Charset.defaultCharset());
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72
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73 StringBuilder sb = new StringBuilder();
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74 for (String line : lines) {
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75 sb.append(line).append('\n');
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76 }
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77 return sb.toString();
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78 }
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79 }