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annotate test/serviceability/dcmd/DcmdUtil.java @ 14304:a2866d45e99e

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8027454: Do not traverse string table during G1 remark when treating them as strong roots during initial mark Summary: Do not try to unlink string table entries unconditionally during remark. This is without side effects as the preceding initial mark always uses the string table as strong roots. Needs to be fixed with class unloading during concurrent mark. Reviewed-by: brutisso, mgerdin
author tschatzl
date Mon, 20 Jan 2014 11:47:29 +0100
parents afa21611f918
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 import sun.management.ManagementFactoryHelper;
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25
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26 import com.sun.management.DiagnosticCommandMBean;
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27
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28 public class DcmdUtil
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29 {
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30 public static String executeDcmd(String cmd, String ... args) {
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31 DiagnosticCommandMBean dcmd = ManagementFactoryHelper.getDiagnosticCommandMBean();
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32 Object[] dcmdArgs = {args};
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33 String[] signature = {String[].class.getName()};
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34
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35 try {
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36 System.out.print("> " + cmd + " ");
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37 for (String s : args) {
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38 System.out.print(s + " ");
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39 }
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40 System.out.println(":");
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41 String result = (String) dcmd.invoke(transform(cmd), dcmdArgs, signature);
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42 System.out.println(result);
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43 return result;
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44 } catch(Exception ex) {
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45 ex.printStackTrace();
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46 }
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47 return null;
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48 }
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49
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50 private static String transform(String name) {
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51 StringBuilder sb = new StringBuilder();
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52 boolean toLower = true;
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53 boolean toUpper = false;
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54 for (int i = 0; i < name.length(); i++) {
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55 char c = name.charAt(i);
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56 if (c == '.' || c == '_') {
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57 toLower = false;
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58 toUpper = true;
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59 } else {
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60 if (toUpper) {
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61 toUpper = false;
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62 sb.append(Character.toUpperCase(c));
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63 } else if(toLower) {
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64 sb.append(Character.toLowerCase(c));
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65 } else {
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66 sb.append(c);
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67 }
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68 }
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69 }
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70 return sb.toString();
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71 }
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72
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73 }