1 /* 2 * Copyright (C) 2015 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 17 package com.android.server.pm; 18 19 import android.os.Build; 20 import android.os.SystemProperties; 21 import android.text.TextUtils; 22 import android.util.ArraySet; 23 24 import com.android.server.pm.parsing.pkg.AndroidPackage; 25 import com.android.server.pm.parsing.pkg.AndroidPackageUtils; 26 27 import dalvik.system.VMRuntime; 28 29 import java.util.ArrayList; 30 import java.util.List; 31 32 /** 33 * Provides various methods for obtaining and converting of instruction sets. 34 * 35 * @hide 36 */ 37 public class InstructionSets { 38 private static final String PREFERRED_INSTRUCTION_SET = 39 VMRuntime.getInstructionSet(Build.SUPPORTED_ABIS[0]); 40 getAppDexInstructionSets(String primaryCpuAbi, String secondaryCpuAbi)41 public static String[] getAppDexInstructionSets(String primaryCpuAbi, String secondaryCpuAbi) { 42 if (primaryCpuAbi != null) { 43 if (secondaryCpuAbi != null) { 44 return new String[] { 45 VMRuntime.getInstructionSet(primaryCpuAbi), 46 VMRuntime.getInstructionSet(secondaryCpuAbi) }; 47 } else { 48 return new String[] { 49 VMRuntime.getInstructionSet(primaryCpuAbi) }; 50 } 51 } 52 53 return new String[] { getPreferredInstructionSet() }; 54 } 55 getPreferredInstructionSet()56 public static String getPreferredInstructionSet() { 57 return PREFERRED_INSTRUCTION_SET; 58 } 59 60 /** 61 * Returns the instruction set that should be used to compile dex code. In the presence of 62 * a native bridge this might be different than the one shared libraries use. 63 */ getDexCodeInstructionSet(String sharedLibraryIsa)64 public static String getDexCodeInstructionSet(String sharedLibraryIsa) { 65 // TODO b/19550105 Build mapping once instead of querying each time 66 String dexCodeIsa = SystemProperties.get("ro.dalvik.vm.isa." + sharedLibraryIsa); 67 return TextUtils.isEmpty(dexCodeIsa) ? sharedLibraryIsa : dexCodeIsa; 68 } 69 getDexCodeInstructionSets(String[] instructionSets)70 public static String[] getDexCodeInstructionSets(String[] instructionSets) { 71 ArraySet<String> dexCodeInstructionSets = new ArraySet<String>(instructionSets.length); 72 for (String instructionSet : instructionSets) { 73 dexCodeInstructionSets.add(getDexCodeInstructionSet(instructionSet)); 74 } 75 return dexCodeInstructionSets.toArray(new String[dexCodeInstructionSets.size()]); 76 } 77 78 /** 79 * Returns deduplicated list of supported instructions for dex code. 80 */ getAllDexCodeInstructionSets()81 public static String[] getAllDexCodeInstructionSets() { 82 String[] supportedInstructionSets = new String[Build.SUPPORTED_ABIS.length]; 83 for (int i = 0; i < supportedInstructionSets.length; i++) { 84 String abi = Build.SUPPORTED_ABIS[i]; 85 supportedInstructionSets[i] = VMRuntime.getInstructionSet(abi); 86 } 87 return getDexCodeInstructionSets(supportedInstructionSets); 88 } 89 getAllInstructionSets()90 public static List<String> getAllInstructionSets() { 91 final String[] allAbis = Build.SUPPORTED_ABIS; 92 final List<String> allInstructionSets = new ArrayList<String>(allAbis.length); 93 94 for (String abi : allAbis) { 95 final String instructionSet = VMRuntime.getInstructionSet(abi); 96 if (!allInstructionSets.contains(instructionSet)) { 97 allInstructionSets.add(instructionSet); 98 } 99 } 100 101 return allInstructionSets; 102 } 103 104 /** 105 * Calculates the primary instruction set based on the computed Abis of a given package. 106 */ getPrimaryInstructionSet(PackageAbiHelper.Abis abis)107 public static String getPrimaryInstructionSet(PackageAbiHelper.Abis abis) { 108 if (abis.primary == null) { 109 return getPreferredInstructionSet(); 110 } 111 112 return VMRuntime.getInstructionSet(abis.primary); 113 } 114 } 115