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annotate test/testlibrary/whitebox/sun/hotspot/cpuinfo/CPUInfo.java @ 17817:4abb719c5620

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8038240: new WB API to get nmethod Reviewed-by: morris, kvn
author iignatyev
date Thu, 27 Mar 2014 11:17:26 +0400
parents a48e16541e6b
children
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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 package sun.hotspot.cpuinfo;
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26
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27 import java.util.List;
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28 import java.util.ArrayList;
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29 import java.util.Arrays;
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30 import java.util.Collections;
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31 import java.util.regex.Pattern;
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32 import java.util.regex.Matcher;
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33
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34 import sun.hotspot.WhiteBox;
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35
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36 /**
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37 * Information about CPU on test box.
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38 *
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39 * CPUInfo uses WhiteBox to gather information,
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40 * so WhiteBox class should be added to bootclasspath
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41 * and option -XX:+WhiteBoxAPI should expclicetly
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42 * specified on command line.
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43 */
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44 public class CPUInfo {
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45
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46 private static final List<String> features;
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47 private static final String additionalCPUInfo;
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48
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49 static {
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50 WhiteBox wb = WhiteBox.getWhiteBox();
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51
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52 Pattern additionalCPUInfoRE =
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53 Pattern.compile("([^(]*\\([^)]*\\)[^,]*),\\s*");
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54
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55 String cpuFeaturesString = wb.getCPUFeatures();
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56 Matcher matcher = additionalCPUInfoRE.matcher(cpuFeaturesString);
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57 if (matcher.find()) {
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58 additionalCPUInfo = matcher.group(1);
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59 } else {
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60 additionalCPUInfo = "";
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61 }
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62 String splittedFeatures[] = matcher.replaceAll("").split("(, )| ");
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63
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64 features = Collections.unmodifiableList(Arrays.
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65 asList(splittedFeatures));
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66 }
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67
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68 /**
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69 * Get additional information about CPU.
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70 * For example, on X86 in will be family/model/stepping
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71 * and number of cores.
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72 *
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73 * @return additional CPU info
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74 */
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75 public static String getAdditionalCPUInfo() {
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76 return additionalCPUInfo;
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77 }
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78
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79 /**
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80 * Get all known features supported by CPU.
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81 *
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82 * @return unmodifiable list with names of all known features
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83 * supported by CPU.
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84 */
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85 public static List<String> getFeatures() {
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86 return features;
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87 }
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88
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89 /**
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90 * Check if some feature is supported by CPU.
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91 *
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92 * @param feature Name of feature to be tested.
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93 * @return <b>true</b> if tested feature is supported by CPU.
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94 */
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95 public static boolean hasFeature(String feature) {
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96 return features.contains(feature.toLowerCase());
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97 }
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98 }