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      1 /*
      2  * Copyright (C) 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 package com.android.compatibility.common.util;
     17 import com.android.tradefed.device.CollectingOutputReceiver;
     18 
     19 import com.android.tradefed.device.DeviceNotAvailableException;
     20 import com.android.tradefed.device.ITestDevice;
     21 import java.util.regex.Pattern;
     22 
     23 /**
     24  * Host-side utility class for reading properties and gathering information for testing
     25  * Android device compatibility.
     26  */
     27 public class CpuFeatures {
     28 
     29     private static final String UNAME_OPTION_MACHINE_TYPE = "-m";
     30     private static final String UNAME_OPTION_KERNEL_RELEASE = "-r";
     31 
     32     private static String uname(ITestDevice device, String option) throws DeviceNotAvailableException {
     33         CollectingOutputReceiver Out = new CollectingOutputReceiver();
     34         device.executeShellCommand("uname " + option, Out);
     35         return Out.getOutput().trim();
     36     }
     37 
     38     /**
     39      * Return true if architecture is arm64.
     40      */
     41     public static boolean isArm64(ITestDevice device) throws DeviceNotAvailableException {
     42 
     43         return uname(device, UNAME_OPTION_MACHINE_TYPE).contains("aarch64");
     44     }
     45 
     46     /**
     47      * Return true if architecture is arm32.
     48      */
     49     public static boolean isArm32(ITestDevice device) throws DeviceNotAvailableException {
     50 
     51         return uname(device, UNAME_OPTION_MACHINE_TYPE).contains("armv7");
     52     }
     53 
     54     /**
     55      * Return true if architecture is x86.
     56      */
     57     public static boolean isX86(ITestDevice device) throws DeviceNotAvailableException {
     58 
     59         return uname(device, UNAME_OPTION_MACHINE_TYPE).contains("x86");
     60     }
     61 
     62     /**
     63      * Return true kernel if version is less than input values.
     64      */
     65     public static boolean kernelVersionLessThan(ITestDevice device, int major, int minor)
     66             throws DeviceNotAvailableException {
     67 
     68         String[] kernelVersion = uname(device, UNAME_OPTION_KERNEL_RELEASE).split(Pattern.quote("."));
     69         int deviceMajor = Integer.parseInt(kernelVersion[0]);
     70         int deviceMinor = Integer.parseInt(kernelVersion[1]);
     71 
     72         return (major < deviceMajor) || ((major == deviceMajor) && (minor < deviceMinor));
     73     }
     74 }
     75