97 lines
3.0 KiB
Java
97 lines
3.0 KiB
Java
/*
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* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package sun.hotspot.cpuinfo;
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import java.util.List;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.regex.Pattern;
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import java.util.regex.Matcher;
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import sun.hotspot.WhiteBox;
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/**
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* Information about CPU on test box.
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*
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* CPUInfo uses WhiteBox to gather information,
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* so WhiteBox class should be added to bootclasspath
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* and option -XX:+WhiteBoxAPI should be explicitly
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* specified on command line.
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*/
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public class CPUInfo {
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private static final List<String> features;
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private static final String additionalCPUInfo;
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static {
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WhiteBox wb = WhiteBox.getWhiteBox();
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Pattern additionalCPUInfoRE =
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Pattern.compile("([^(]*\\([^)]*\\)[^,]*),\\s*");
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String cpuFeaturesString = wb.getCPUFeatures();
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Matcher matcher = additionalCPUInfoRE.matcher(cpuFeaturesString);
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if (matcher.find()) {
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additionalCPUInfo = matcher.group(1);
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} else {
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additionalCPUInfo = "";
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}
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String splittedFeatures[] = matcher.replaceAll("").split("(, )| ");
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features = Collections.unmodifiableList(Arrays.
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asList(splittedFeatures));
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}
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/**
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* Get additional information about CPU.
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* For example, on X86 in will be family/model/stepping
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* and number of cores.
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*
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* @return additional CPU info
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*/
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public static String getAdditionalCPUInfo() {
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return additionalCPUInfo;
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}
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/**
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* Get all known features supported by CPU.
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*
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* @return unmodifiable list with names of all known features
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* supported by CPU.
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*/
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public static List<String> getFeatures() {
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return features;
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}
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/**
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* Check if some feature is supported by CPU.
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*
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* @param feature Name of feature to be tested.
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* @return <b>true</b> if tested feature is supported by CPU.
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*/
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public static boolean hasFeature(String feature) {
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return features.contains(feature.toLowerCase());
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}
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}
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