PackageManagerServiceUtils.java revision fad6dc10b0e723f81a264ce608a47f2b7c279b2a
1/* 2 * Copyright (C) 2016 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 17package com.android.server.pm; 18 19import com.android.server.pm.dex.DexManager; 20import com.android.server.pm.dex.PackageDexUsage; 21 22import static com.android.server.pm.PackageManagerService.DEBUG_DEXOPT; 23import static com.android.server.pm.PackageManagerService.TAG; 24 25import com.android.internal.util.ArrayUtils; 26 27import android.annotation.NonNull; 28import android.app.AppGlobals; 29import android.content.Intent; 30import android.content.pm.PackageParser; 31import android.content.pm.ResolveInfo; 32import android.os.Build; 33import android.os.RemoteException; 34import android.os.UserHandle; 35import android.system.ErrnoException; 36import android.system.Os; 37import android.util.ArraySet; 38import android.util.Log; 39import android.util.Slog; 40import android.util.jar.StrictJarFile; 41import dalvik.system.VMRuntime; 42import libcore.io.Libcore; 43 44import java.io.File; 45import java.io.IOException; 46import java.util.ArrayList; 47import java.util.Collection; 48import java.util.Collections; 49import java.util.Iterator; 50import java.util.LinkedList; 51import java.util.List; 52import java.util.function.Predicate; 53import java.util.zip.ZipEntry; 54 55/** 56 * Class containing helper methods for the PackageManagerService. 57 * 58 * {@hide} 59 */ 60public class PackageManagerServiceUtils { 61 private final static long SEVEN_DAYS_IN_MILLISECONDS = 7 * 24 * 60 * 60 * 1000; 62 63 private static ArraySet<String> getPackageNamesForIntent(Intent intent, int userId) { 64 List<ResolveInfo> ris = null; 65 try { 66 ris = AppGlobals.getPackageManager().queryIntentReceivers(intent, null, 0, userId) 67 .getList(); 68 } catch (RemoteException e) { 69 } 70 ArraySet<String> pkgNames = new ArraySet<String>(); 71 if (ris != null) { 72 for (ResolveInfo ri : ris) { 73 pkgNames.add(ri.activityInfo.packageName); 74 } 75 } 76 return pkgNames; 77 } 78 79 // Sort a list of apps by their last usage, most recently used apps first. The order of 80 // packages without usage data is undefined (but they will be sorted after the packages 81 // that do have usage data). 82 public static void sortPackagesByUsageDate(List<PackageParser.Package> pkgs, 83 PackageManagerService packageManagerService) { 84 if (!packageManagerService.isHistoricalPackageUsageAvailable()) { 85 return; 86 } 87 88 Collections.sort(pkgs, (pkg1, pkg2) -> 89 Long.compare(pkg2.getLatestForegroundPackageUseTimeInMills(), 90 pkg1.getLatestForegroundPackageUseTimeInMills())); 91 } 92 93 // Apply the given {@code filter} to all packages in {@code packages}. If tested positive, the 94 // package will be removed from {@code packages} and added to {@code result} with its 95 // dependencies. If usage data is available, the positive packages will be sorted by usage 96 // data (with {@code sortTemp} as temporary storage). 97 private static void applyPackageFilter(Predicate<PackageParser.Package> filter, 98 Collection<PackageParser.Package> result, 99 Collection<PackageParser.Package> packages, 100 @NonNull List<PackageParser.Package> sortTemp, 101 PackageManagerService packageManagerService) { 102 for (PackageParser.Package pkg : packages) { 103 if (filter.test(pkg)) { 104 sortTemp.add(pkg); 105 } 106 } 107 108 sortPackagesByUsageDate(sortTemp, packageManagerService); 109 packages.removeAll(sortTemp); 110 111 for (PackageParser.Package pkg : sortTemp) { 112 result.add(pkg); 113 114 Collection<PackageParser.Package> deps = 115 packageManagerService.findSharedNonSystemLibraries(pkg); 116 if (!deps.isEmpty()) { 117 deps.removeAll(result); 118 result.addAll(deps); 119 packages.removeAll(deps); 120 } 121 } 122 123 sortTemp.clear(); 124 } 125 126 // Sort apps by importance for dexopt ordering. Important apps are given 127 // more priority in case the device runs out of space. 128 public static List<PackageParser.Package> getPackagesForDexopt( 129 Collection<PackageParser.Package> packages, 130 PackageManagerService packageManagerService) { 131 ArrayList<PackageParser.Package> remainingPkgs = new ArrayList<>(packages); 132 LinkedList<PackageParser.Package> result = new LinkedList<>(); 133 ArrayList<PackageParser.Package> sortTemp = new ArrayList<>(remainingPkgs.size()); 134 135 // Give priority to core apps. 136 applyPackageFilter((pkg) -> pkg.coreApp, result, remainingPkgs, sortTemp, 137 packageManagerService); 138 139 // Give priority to system apps that listen for pre boot complete. 140 Intent intent = new Intent(Intent.ACTION_PRE_BOOT_COMPLETED); 141 final ArraySet<String> pkgNames = getPackageNamesForIntent(intent, UserHandle.USER_SYSTEM); 142 applyPackageFilter((pkg) -> pkgNames.contains(pkg.packageName), result, remainingPkgs, 143 sortTemp, packageManagerService); 144 145 // Give priority to apps used by other apps. 146 DexManager dexManager = packageManagerService.getDexManager(); 147 applyPackageFilter((pkg) -> 148 dexManager.getPackageUseInfoOrDefault(pkg.packageName).isUsedByOtherApps(), result, 149 remainingPkgs, sortTemp, packageManagerService); 150 151 // Filter out packages that aren't recently used, add all remaining apps. 152 // TODO: add a property to control this? 153 Predicate<PackageParser.Package> remainingPredicate; 154 if (!remainingPkgs.isEmpty() && packageManagerService.isHistoricalPackageUsageAvailable()) { 155 if (DEBUG_DEXOPT) { 156 Log.i(TAG, "Looking at historical package use"); 157 } 158 // Get the package that was used last. 159 PackageParser.Package lastUsed = Collections.max(remainingPkgs, (pkg1, pkg2) -> 160 Long.compare(pkg1.getLatestForegroundPackageUseTimeInMills(), 161 pkg2.getLatestForegroundPackageUseTimeInMills())); 162 if (DEBUG_DEXOPT) { 163 Log.i(TAG, "Taking package " + lastUsed.packageName + " as reference in time use"); 164 } 165 long estimatedPreviousSystemUseTime = 166 lastUsed.getLatestForegroundPackageUseTimeInMills(); 167 // Be defensive if for some reason package usage has bogus data. 168 if (estimatedPreviousSystemUseTime != 0) { 169 final long cutoffTime = estimatedPreviousSystemUseTime - SEVEN_DAYS_IN_MILLISECONDS; 170 remainingPredicate = 171 (pkg) -> pkg.getLatestForegroundPackageUseTimeInMills() >= cutoffTime; 172 } else { 173 // No meaningful historical info. Take all. 174 remainingPredicate = (pkg) -> true; 175 } 176 sortPackagesByUsageDate(remainingPkgs, packageManagerService); 177 } else { 178 // No historical info. Take all. 179 remainingPredicate = (pkg) -> true; 180 } 181 applyPackageFilter(remainingPredicate, result, remainingPkgs, sortTemp, 182 packageManagerService); 183 184 if (DEBUG_DEXOPT) { 185 Log.i(TAG, "Packages to be dexopted: " + packagesToString(result)); 186 Log.i(TAG, "Packages skipped from dexopt: " + packagesToString(remainingPkgs)); 187 } 188 189 return result; 190 } 191 192 /** 193 * Checks if the package was inactive during since <code>thresholdTimeinMillis</code>. 194 * Package is considered active, if: 195 * 1) It was active in foreground. 196 * 2) It was active in background and also used by other apps. 197 * 198 * If it doesn't have sufficient information about the package, it return <code>false</code>. 199 */ 200 static boolean isUnusedSinceTimeInMillis(long firstInstallTime, long currentTimeInMillis, 201 long thresholdTimeinMillis, PackageDexUsage.PackageUseInfo packageUseInfo, 202 long latestPackageUseTimeInMillis, long latestForegroundPackageUseTimeInMillis) { 203 204 if (currentTimeInMillis - firstInstallTime < thresholdTimeinMillis) { 205 return false; 206 } 207 208 // If the app was active in foreground during the threshold period. 209 boolean isActiveInForeground = (currentTimeInMillis 210 - latestForegroundPackageUseTimeInMillis) 211 < thresholdTimeinMillis; 212 213 if (isActiveInForeground) { 214 return false; 215 } 216 217 // If the app was active in background during the threshold period and was used 218 // by other packages. 219 boolean isActiveInBackgroundAndUsedByOtherPackages = ((currentTimeInMillis 220 - latestPackageUseTimeInMillis) 221 < thresholdTimeinMillis) 222 && packageUseInfo.isUsedByOtherApps(); 223 224 return !isActiveInBackgroundAndUsedByOtherPackages; 225 } 226 227 /** 228 * Returns the canonicalized path of {@code path} as per {@code realpath(3)} 229 * semantics. 230 */ 231 public static String realpath(File path) throws IOException { 232 try { 233 return Os.realpath(path.getAbsolutePath()); 234 } catch (ErrnoException ee) { 235 throw ee.rethrowAsIOException(); 236 } 237 } 238 239 public static String packagesToString(Collection<PackageParser.Package> c) { 240 StringBuilder sb = new StringBuilder(); 241 for (PackageParser.Package pkg : c) { 242 if (sb.length() > 0) { 243 sb.append(", "); 244 } 245 sb.append(pkg.packageName); 246 } 247 return sb.toString(); 248 } 249 250 /** 251 * Verifies that the given string {@code isa} is a valid supported isa on 252 * the running device. 253 */ 254 public static boolean checkISA(String isa) { 255 for (String abi : Build.SUPPORTED_ABIS) { 256 if (VMRuntime.getInstructionSet(abi).equals(isa)) { 257 return true; 258 } 259 } 260 return false; 261 } 262 263 /** 264 * Checks that the archive located at {@code fileName} has uncompressed dex file and so 265 * files that can be direclty mapped. 266 */ 267 public static void logApkHasUncompressedCode(String fileName) { 268 StrictJarFile jarFile = null; 269 try { 270 jarFile = new StrictJarFile(fileName, 271 false /*verify*/, false /*signatureSchemeRollbackProtectionsEnforced*/); 272 Iterator<ZipEntry> it = jarFile.iterator(); 273 while (it.hasNext()) { 274 ZipEntry entry = it.next(); 275 if (entry.getName().endsWith(".dex")) { 276 if (entry.getMethod() != ZipEntry.STORED) { 277 Slog.wtf(TAG, "APK " + fileName + " has compressed dex code " + 278 entry.getName()); 279 } else if ((entry.getDataOffset() & 0x3) != 0) { 280 Slog.wtf(TAG, "APK " + fileName + " has unaligned dex code " + 281 entry.getName()); 282 } 283 } else if (entry.getName().endsWith(".so")) { 284 if (entry.getMethod() != ZipEntry.STORED) { 285 Slog.wtf(TAG, "APK " + fileName + " has compressed native code " + 286 entry.getName()); 287 } else if ((entry.getDataOffset() & (0x1000 - 1)) != 0) { 288 Slog.wtf(TAG, "APK " + fileName + " has unaligned native code " + 289 entry.getName()); 290 } 291 } 292 } 293 } catch (IOException ignore) { 294 Slog.wtf(TAG, "Error when parsing APK " + fileName); 295 } finally { 296 try { 297 if (jarFile != null) { 298 jarFile.close(); 299 } 300 } catch (IOException ignore) {} 301 } 302 return; 303 } 304 305 /** 306 * Checks that the APKs in the given package have uncompressed dex file and so 307 * files that can be direclty mapped. 308 */ 309 public static void logPackageHasUncompressedCode(PackageParser.Package pkg) { 310 logApkHasUncompressedCode(pkg.baseCodePath); 311 if (!ArrayUtils.isEmpty(pkg.splitCodePaths)) { 312 for (int i = 0; i < pkg.splitCodePaths.length; i++) { 313 logApkHasUncompressedCode(pkg.splitCodePaths[i]); 314 } 315 } 316 } 317} 318