1 /* 2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 package sun.hotspot.cpuinfo; 26 27 import java.util.List; 28 import java.util.ArrayList; 29 import java.util.Arrays; 30 import java.util.Collections; 31 import java.util.regex.Pattern; 32 import java.util.regex.Matcher; 33 34 import sun.hotspot.WhiteBox; 35 36 /** 37 * Information about CPU on test box. 38 * 39 * CPUInfo uses WhiteBox to gather information, 40 * so WhiteBox class should be added to bootclasspath 41 * and option -XX:+WhiteBoxAPI should expclicetly 42 * specified on command line. 43 */ 44 public class CPUInfo { 45 46 private static final List<String> features; 47 private static final String additionalCPUInfo; 48 49 static { 50 WhiteBox wb = WhiteBox.getWhiteBox(); 51 52 Pattern additionalCPUInfoRE = 53 Pattern.compile("([^(]*\\([^)]*\\)[^,]*),\\s*"); 54 55 String cpuFeaturesString = wb.getCPUFeatures(); 56 Matcher matcher = additionalCPUInfoRE.matcher(cpuFeaturesString); 57 if (matcher.find()) { 58 additionalCPUInfo = matcher.group(1); 59 } else { 60 additionalCPUInfo = ""; 61 } 62 String splittedFeatures[] = matcher.replaceAll("").split("(, )| "); 63 64 features = Collections.unmodifiableList(Arrays. 65 asList(splittedFeatures)); 66 } 67 68 /** 69 * Get additional information about CPU. 70 * For example, on X86 in will be family/model/stepping 71 * and number of cores. 72 * 73 * @return additional CPU info 74 */ 75 public static String getAdditionalCPUInfo() { 76 return additionalCPUInfo; 77 } 78 79 /** 80 * Get all known features supported by CPU. 81 * 82 * @return unmodifiable list with names of all known features 83 * supported by CPU. 84 */ 85 public static List<String> getFeatures() { 86 return features; 87 } 88 89 /** 90 * Check if some feature is supported by CPU. 91 * 92 * @param feature Name of feature to be tested. 93 * @return <b>true</b> if tested feature is supported by CPU. 94 */ 95 public static boolean hasFeature(String feature) { 96 return features.contains(feature.toLowerCase()); 97 } 98 }