| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License |
| */ |
| |
| package com.android.server.pm.dex; |
| |
| import android.util.AtomicFile; |
| import android.util.Slog; |
| import android.os.Build; |
| |
| import com.android.internal.annotations.GuardedBy; |
| import com.android.internal.annotations.VisibleForTesting; |
| import com.android.internal.util.FastPrintWriter; |
| import com.android.server.pm.AbstractStatsBase; |
| import com.android.server.pm.PackageManagerServiceUtils; |
| |
| import java.io.BufferedReader; |
| import java.io.FileNotFoundException; |
| import java.io.FileOutputStream; |
| import java.io.InputStreamReader; |
| import java.io.IOException; |
| import java.io.OutputStreamWriter; |
| import java.io.Reader; |
| import java.io.StringWriter; |
| import java.io.Writer; |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.Set; |
| |
| import dalvik.system.VMRuntime; |
| import libcore.io.IoUtils; |
| |
| /** |
| * Stat file which store usage information about dex files. |
| */ |
| public class PackageDexUsage extends AbstractStatsBase<Void> { |
| private final static String TAG = "PackageDexUsage"; |
| |
| // We support previous version to ensure that the usage list remains valid cross OTAs. |
| private final static int PACKAGE_DEX_USAGE_SUPPORTED_VERSION_1 = 1; |
| // Version 2 added: |
| // - the list of packages that load the dex files |
| // - class loader contexts for secondary dex files |
| // - usage for all code paths (including splits) |
| private final static int PACKAGE_DEX_USAGE_SUPPORTED_VERSION_2 = 2; |
| |
| private final static int PACKAGE_DEX_USAGE_VERSION = PACKAGE_DEX_USAGE_SUPPORTED_VERSION_2; |
| |
| private final static String PACKAGE_DEX_USAGE_VERSION_HEADER = |
| "PACKAGE_MANAGER__PACKAGE_DEX_USAGE__"; |
| |
| private final static String SPLIT_CHAR = ","; |
| private final static String CODE_PATH_LINE_CHAR = "+"; |
| private final static String DEX_LINE_CHAR = "#"; |
| private final static String LOADING_PACKAGE_CHAR = "@"; |
| |
| // One of the things we record about dex files is the class loader context that was used to |
| // load them. That should be stable but if it changes we don't keep track of variable contexts. |
| // Instead we put a special marker in the dex usage file in order to recognize the case and |
| // skip optimizations on that dex files. |
| /*package*/ static final String VARIABLE_CLASS_LOADER_CONTEXT = |
| "=VariableClassLoaderContext="; |
| // The markers used for unknown class loader contexts. This can happen if the dex file was |
| // recorded in a previous version and we didn't have a chance to update its usage. |
| /*package*/ static final String UNKNOWN_CLASS_LOADER_CONTEXT = |
| "=UnknownClassLoaderContext="; |
| |
| // The marker used for unsupported class loader contexts (no longer written, may occur in old |
| // files so discarded on read). |
| private static final String UNSUPPORTED_CLASS_LOADER_CONTEXT = |
| "=UnsupportedClassLoaderContext="; |
| |
| // Map which structures the information we have on a package. |
| // Maps package name to package data (which stores info about UsedByOtherApps and |
| // secondary dex files.). |
| // Access to this map needs synchronized. |
| @GuardedBy("mPackageUseInfoMap") |
| private final Map<String, PackageUseInfo> mPackageUseInfoMap; |
| |
| /* package */ PackageDexUsage() { |
| super("package-dex-usage.list", "PackageDexUsage_DiskWriter", /*lock*/ false); |
| mPackageUseInfoMap = new HashMap<>(); |
| } |
| |
| /** |
| * Record a dex file load. |
| * |
| * Note this is called when apps load dex files and as such it should return |
| * as fast as possible. |
| * |
| * @param owningPackageName the package owning the dex path |
| * @param dexPath the path of the dex files being loaded |
| * @param ownerUserId the user id which runs the code loading the dex files |
| * @param loaderIsa the ISA of the app loading the dex files |
| * @param isUsedByOtherApps whether or not this dex file was not loaded by its owning package |
| * @param primaryOrSplit whether or not the dex file is a primary/split dex. True indicates |
| * the file is either primary or a split. False indicates the file is secondary dex. |
| * @param loadingPackageName the package performing the load. Recorded only if it is different |
| * than {@param owningPackageName}. |
| * @return true if the dex load constitutes new information, or false if this information |
| * has been seen before. |
| */ |
| /* package */ boolean record(String owningPackageName, String dexPath, int ownerUserId, |
| String loaderIsa, boolean isUsedByOtherApps, boolean primaryOrSplit, |
| String loadingPackageName, String classLoaderContext) { |
| if (!PackageManagerServiceUtils.checkISA(loaderIsa)) { |
| throw new IllegalArgumentException("loaderIsa " + loaderIsa + " is unsupported"); |
| } |
| if (classLoaderContext == null) { |
| throw new IllegalArgumentException("Null classLoaderContext"); |
| } |
| |
| synchronized (mPackageUseInfoMap) { |
| PackageUseInfo packageUseInfo = mPackageUseInfoMap.get(owningPackageName); |
| if (packageUseInfo == null) { |
| // This is the first time we see the package. |
| packageUseInfo = new PackageUseInfo(); |
| if (primaryOrSplit) { |
| // If we have a primary or a split apk, set isUsedByOtherApps. |
| // We do not need to record the loaderIsa or the owner because we compile |
| // primaries for all users and all ISAs. |
| packageUseInfo.mergeCodePathUsedByOtherApps(dexPath, isUsedByOtherApps, |
| owningPackageName, loadingPackageName); |
| } else { |
| // For secondary dex files record the loaderISA and the owner. We'll need |
| // to know under which user to compile and for what ISA. |
| DexUseInfo newData = new DexUseInfo(isUsedByOtherApps, ownerUserId, |
| classLoaderContext, loaderIsa); |
| packageUseInfo.mDexUseInfoMap.put(dexPath, newData); |
| maybeAddLoadingPackage(owningPackageName, loadingPackageName, |
| newData.mLoadingPackages); |
| } |
| mPackageUseInfoMap.put(owningPackageName, packageUseInfo); |
| return true; |
| } else { |
| // We already have data on this package. Amend it. |
| if (primaryOrSplit) { |
| // We have a possible update on the primary apk usage. Merge |
| // isUsedByOtherApps information and return if there was an update. |
| return packageUseInfo.mergeCodePathUsedByOtherApps( |
| dexPath, isUsedByOtherApps, owningPackageName, loadingPackageName); |
| } else { |
| DexUseInfo newData = new DexUseInfo( |
| isUsedByOtherApps, ownerUserId, classLoaderContext, loaderIsa); |
| boolean updateLoadingPackages = maybeAddLoadingPackage(owningPackageName, |
| loadingPackageName, newData.mLoadingPackages); |
| |
| DexUseInfo existingData = packageUseInfo.mDexUseInfoMap.get(dexPath); |
| if (existingData == null) { |
| // It's the first time we see this dex file. |
| packageUseInfo.mDexUseInfoMap.put(dexPath, newData); |
| return true; |
| } else { |
| if (ownerUserId != existingData.mOwnerUserId) { |
| // Oups, this should never happen, the DexManager who calls this should |
| // do the proper checks and not call record if the user does not own the |
| // dex path. |
| // Secondary dex files are stored in the app user directory. A change in |
| // owningUser for the same path means that something went wrong at some |
| // higher level, and the loaderUser was allowed to cross |
| // user-boundaries and access data from what we know to be the owner |
| // user. |
| throw new IllegalArgumentException("Trying to change ownerUserId for " |
| + " dex path " + dexPath + " from " + existingData.mOwnerUserId |
| + " to " + ownerUserId); |
| } |
| // Merge the information into the existing data. |
| // Returns true if there was an update. |
| return existingData.merge(newData) || updateLoadingPackages; |
| } |
| } |
| } |
| } |
| } |
| |
| /** |
| * Convenience method for sync reads which does not force the user to pass a useless |
| * (Void) null. |
| */ |
| /* package */ void read() { |
| read((Void) null); |
| } |
| |
| /** |
| * Convenience method for async writes which does not force the user to pass a useless |
| * (Void) null. |
| */ |
| /*package*/ void maybeWriteAsync() { |
| maybeWriteAsync(null); |
| } |
| |
| /*package*/ void writeNow() { |
| writeInternal(null); |
| } |
| |
| @Override |
| protected void writeInternal(Void data) { |
| AtomicFile file = getFile(); |
| FileOutputStream f = null; |
| |
| try { |
| f = file.startWrite(); |
| OutputStreamWriter osw = new OutputStreamWriter(f); |
| write(osw); |
| osw.flush(); |
| file.finishWrite(f); |
| } catch (IOException e) { |
| if (f != null) { |
| file.failWrite(f); |
| } |
| Slog.e(TAG, "Failed to write usage for dex files", e); |
| } |
| } |
| |
| /** |
| * File format: |
| * |
| * file_magic_version |
| * package_name_1 |
| * +code_path1 |
| * @ loading_package_1_1, loading_package_1_2... |
| * +code_path2 |
| * @ loading_package_2_1, loading_package_2_2... |
| * #dex_file_path_1_1 |
| * user_1_1, used_by_other_app_1_1, user_isa_1_1_1, user_isa_1_1_2 |
| * @ loading_package_1_1_1, loading_package_1_1_2... |
| * class_loader_context_1_1 |
| * #dex_file_path_1_2 |
| * user_1_2, used_by_other_app_1_2, user_isa_1_2_1, user_isa_1_2_2 |
| * @ loading_package_1_2_1, loading_package_1_2_2... |
| * class_loader_context_1_2 |
| * ... |
| */ |
| /* package */ void write(Writer out) { |
| // Make a clone to avoid locking while writing to disk. |
| Map<String, PackageUseInfo> packageUseInfoMapClone = clonePackageUseInfoMap(); |
| |
| FastPrintWriter fpw = new FastPrintWriter(out); |
| |
| // Write the header. |
| fpw.print(PACKAGE_DEX_USAGE_VERSION_HEADER); |
| fpw.println(PACKAGE_DEX_USAGE_VERSION); |
| |
| for (Map.Entry<String, PackageUseInfo> pEntry : packageUseInfoMapClone.entrySet()) { |
| // Write the package line. |
| String packageName = pEntry.getKey(); |
| PackageUseInfo packageUseInfo = pEntry.getValue(); |
| fpw.println(packageName); |
| |
| // Write the code paths used by other apps. |
| for (Map.Entry<String, Set<String>> codeEntry : |
| packageUseInfo.mCodePathsUsedByOtherApps.entrySet()) { |
| String codePath = codeEntry.getKey(); |
| Set<String> loadingPackages = codeEntry.getValue(); |
| fpw.println(CODE_PATH_LINE_CHAR + codePath); |
| fpw.println(LOADING_PACKAGE_CHAR + String.join(SPLIT_CHAR, loadingPackages)); |
| } |
| |
| // Write dex file lines. |
| for (Map.Entry<String, DexUseInfo> dEntry : packageUseInfo.mDexUseInfoMap.entrySet()) { |
| String dexPath = dEntry.getKey(); |
| DexUseInfo dexUseInfo = dEntry.getValue(); |
| fpw.println(DEX_LINE_CHAR + dexPath); |
| fpw.print(String.join(SPLIT_CHAR, Integer.toString(dexUseInfo.mOwnerUserId), |
| writeBoolean(dexUseInfo.mIsUsedByOtherApps))); |
| for (String isa : dexUseInfo.mLoaderIsas) { |
| fpw.print(SPLIT_CHAR + isa); |
| } |
| fpw.println(); |
| fpw.println(LOADING_PACKAGE_CHAR |
| + String.join(SPLIT_CHAR, dexUseInfo.mLoadingPackages)); |
| fpw.println(dexUseInfo.getClassLoaderContext()); |
| } |
| } |
| fpw.flush(); |
| } |
| |
| @Override |
| protected void readInternal(Void data) { |
| AtomicFile file = getFile(); |
| BufferedReader in = null; |
| try { |
| in = new BufferedReader(new InputStreamReader(file.openRead())); |
| read(in); |
| } catch (FileNotFoundException expected) { |
| // The file may not be there. E.g. When we first take the OTA with this feature. |
| } catch (IOException e) { |
| Slog.w(TAG, "Failed to parse package dex usage.", e); |
| } finally { |
| IoUtils.closeQuietly(in); |
| } |
| } |
| |
| /* package */ void read(Reader reader) throws IOException { |
| Map<String, PackageUseInfo> data = new HashMap<>(); |
| BufferedReader in = new BufferedReader(reader); |
| // Read header, do version check. |
| String versionLine = in.readLine(); |
| int version; |
| if (versionLine == null) { |
| throw new IllegalStateException("No version line found."); |
| } else { |
| if (!versionLine.startsWith(PACKAGE_DEX_USAGE_VERSION_HEADER)) { |
| // TODO(calin): the caller is responsible to clear the file. |
| throw new IllegalStateException("Invalid version line: " + versionLine); |
| } |
| version = Integer.parseInt( |
| versionLine.substring(PACKAGE_DEX_USAGE_VERSION_HEADER.length())); |
| if (!isSupportedVersion(version)) { |
| throw new IllegalStateException("Unexpected version: " + version); |
| } |
| } |
| |
| String line; |
| String currentPackage = null; |
| PackageUseInfo currentPackageData = null; |
| |
| Set<String> supportedIsas = new HashSet<>(); |
| for (String abi : Build.SUPPORTED_ABIS) { |
| supportedIsas.add(VMRuntime.getInstructionSet(abi)); |
| } |
| while ((line = in.readLine()) != null) { |
| if (line.startsWith(DEX_LINE_CHAR)) { |
| // This is the start of the the dex lines. |
| // We expect 4 lines for each dex entry: |
| // #dexPaths |
| // @loading_package_1,loading_package_2,... |
| // class_loader_context |
| // onwerUserId,isUsedByOtherApps,isa1,isa2 |
| if (currentPackage == null) { |
| throw new IllegalStateException( |
| "Malformed PackageDexUsage file. Expected package line before dex line."); |
| } |
| |
| // Line 1 is the dex path. |
| String dexPath = line.substring(DEX_LINE_CHAR.length()); |
| |
| // Line 2 is the dex data: (userId, isUsedByOtherApps, isa). |
| line = in.readLine(); |
| if (line == null) { |
| throw new IllegalStateException("Could not find dexUseInfo line"); |
| } |
| String[] elems = line.split(SPLIT_CHAR); |
| if (elems.length < 3) { |
| throw new IllegalStateException("Invalid PackageDexUsage line: " + line); |
| } |
| |
| // In version 2 we added the loading packages and class loader context. |
| Set<String> loadingPackages = maybeReadLoadingPackages(in, version); |
| String classLoaderContext = maybeReadClassLoaderContext(in, version); |
| |
| if (UNSUPPORTED_CLASS_LOADER_CONTEXT.equals(classLoaderContext)) { |
| // We used to record use of unsupported class loaders, but we no longer do. |
| // Discard such entries; they will be deleted when we next write the file. |
| continue; |
| } |
| |
| int ownerUserId = Integer.parseInt(elems[0]); |
| boolean isUsedByOtherApps = readBoolean(elems[1]); |
| DexUseInfo dexUseInfo = new DexUseInfo(isUsedByOtherApps, ownerUserId, |
| classLoaderContext, /*isa*/ null); |
| dexUseInfo.mLoadingPackages.addAll(loadingPackages); |
| for (int i = 2; i < elems.length; i++) { |
| String isa = elems[i]; |
| if (supportedIsas.contains(isa)) { |
| dexUseInfo.mLoaderIsas.add(elems[i]); |
| } else { |
| // Should never happen unless someone crafts the file manually. |
| // In theory it could if we drop a supported ISA after an OTA but we don't |
| // do that. |
| Slog.wtf(TAG, "Unsupported ISA when parsing PackageDexUsage: " + isa); |
| } |
| } |
| if (supportedIsas.isEmpty()) { |
| Slog.wtf(TAG, "Ignore dexPath when parsing PackageDexUsage because of " + |
| "unsupported isas. dexPath=" + dexPath); |
| continue; |
| } |
| currentPackageData.mDexUseInfoMap.put(dexPath, dexUseInfo); |
| } else if (line.startsWith(CODE_PATH_LINE_CHAR)) { |
| // This is a code path used by other apps line. |
| if (version < PACKAGE_DEX_USAGE_SUPPORTED_VERSION_2) { |
| throw new IllegalArgumentException("Unexpected code path line when parsing " + |
| "PackageDexUseData: " + line); |
| } |
| |
| // Expects 2 lines: |
| // +code_paths |
| // @loading_packages |
| String codePath = line.substring(CODE_PATH_LINE_CHAR.length()); |
| Set<String> loadingPackages = maybeReadLoadingPackages(in, version); |
| currentPackageData.mCodePathsUsedByOtherApps.put(codePath, loadingPackages); |
| } else { |
| // This is a package line. |
| if (version >= PACKAGE_DEX_USAGE_SUPPORTED_VERSION_2) { |
| currentPackage = line; |
| currentPackageData = new PackageUseInfo(); |
| } else { |
| // Old version (<2) |
| // We expect it to be: `packageName,isUsedByOtherApps`. |
| String[] elems = line.split(SPLIT_CHAR); |
| if (elems.length != 2) { |
| throw new IllegalStateException("Invalid PackageDexUsage line: " + line); |
| } |
| currentPackage = elems[0]; |
| currentPackageData = new PackageUseInfo(); |
| currentPackageData.mUsedByOtherAppsBeforeUpgrade = readBoolean(elems[1]); |
| } |
| data.put(currentPackage, currentPackageData); |
| } |
| } |
| |
| synchronized (mPackageUseInfoMap) { |
| mPackageUseInfoMap.clear(); |
| mPackageUseInfoMap.putAll(data); |
| } |
| } |
| |
| /** |
| * Reads the class loader context encoding from the buffer {@code in} if |
| * {@code version} is at least {PACKAGE_DEX_USAGE_VERSION}. |
| */ |
| private String maybeReadClassLoaderContext(BufferedReader in, int version) throws IOException { |
| String context = null; |
| if (version >= PACKAGE_DEX_USAGE_SUPPORTED_VERSION_2) { |
| context = in.readLine(); |
| if (context == null) { |
| throw new IllegalStateException("Could not find the classLoaderContext line."); |
| } |
| } |
| // The context might be empty if we didn't have the chance to update it after a version |
| // upgrade. In this case return the special marker so that we recognize this is an unknown |
| // context. |
| return context == null ? UNKNOWN_CLASS_LOADER_CONTEXT : context; |
| } |
| |
| /** |
| * Reads the list of loading packages from the buffer {@code in} if |
| * {@code version} is at least {PACKAGE_DEX_USAGE_SUPPORTED_VERSION_2}. |
| */ |
| private Set<String> maybeReadLoadingPackages(BufferedReader in, int version) |
| throws IOException { |
| if (version >= PACKAGE_DEX_USAGE_SUPPORTED_VERSION_2) { |
| String line = in.readLine(); |
| if (line == null) { |
| throw new IllegalStateException("Could not find the loadingPackages line."); |
| } |
| // We expect that most of the times the list of loading packages will be empty. |
| if (line.length() == LOADING_PACKAGE_CHAR.length()) { |
| return Collections.emptySet(); |
| } else { |
| Set<String> result = new HashSet<>(); |
| Collections.addAll(result, |
| line.substring(LOADING_PACKAGE_CHAR.length()).split(SPLIT_CHAR)); |
| return result; |
| } |
| } else { |
| return Collections.emptySet(); |
| } |
| } |
| |
| /** |
| * Utility method which adds {@param loadingPackage} to {@param loadingPackages} only if it's |
| * not equal to {@param owningPackage} |
| */ |
| private boolean maybeAddLoadingPackage(String owningPackage, String loadingPackage, |
| Set<String> loadingPackages) { |
| return !owningPackage.equals(loadingPackage) && loadingPackages.add(loadingPackage); |
| } |
| |
| private boolean isSupportedVersion(int version) { |
| return version == PACKAGE_DEX_USAGE_SUPPORTED_VERSION_1 |
| || version == PACKAGE_DEX_USAGE_SUPPORTED_VERSION_2; |
| } |
| |
| /** |
| * Syncs the existing data with the set of available packages by removing obsolete entries. |
| */ |
| /*package*/ void syncData(Map<String, Set<Integer>> packageToUsersMap, |
| Map<String, Set<String>> packageToCodePaths) { |
| synchronized (mPackageUseInfoMap) { |
| Iterator<Map.Entry<String, PackageUseInfo>> pIt = |
| mPackageUseInfoMap.entrySet().iterator(); |
| while (pIt.hasNext()) { |
| Map.Entry<String, PackageUseInfo> pEntry = pIt.next(); |
| String packageName = pEntry.getKey(); |
| PackageUseInfo packageUseInfo = pEntry.getValue(); |
| Set<Integer> users = packageToUsersMap.get(packageName); |
| if (users == null) { |
| // The package doesn't exist anymore, remove the record. |
| pIt.remove(); |
| } else { |
| // The package exists but we can prune the entries associated with non existing |
| // users. |
| Iterator<Map.Entry<String, DexUseInfo>> dIt = |
| packageUseInfo.mDexUseInfoMap.entrySet().iterator(); |
| while (dIt.hasNext()) { |
| DexUseInfo dexUseInfo = dIt.next().getValue(); |
| if (!users.contains(dexUseInfo.mOwnerUserId)) { |
| // User was probably removed. Delete its dex usage info. |
| dIt.remove(); |
| } |
| } |
| |
| // Sync the code paths. |
| Set<String> codePaths = packageToCodePaths.get(packageName); |
| Iterator<Map.Entry<String, Set<String>>> codeIt = |
| packageUseInfo.mCodePathsUsedByOtherApps.entrySet().iterator(); |
| while (codeIt.hasNext()) { |
| if (!codePaths.contains(codeIt.next().getKey())) { |
| codeIt.remove(); |
| } |
| } |
| |
| // In case the package was marked as used by other apps in a previous version |
| // propagate the flag to all the code paths. |
| // See mUsedByOtherAppsBeforeUpgrade docs on why it is important to do it. |
| if (packageUseInfo.mUsedByOtherAppsBeforeUpgrade) { |
| for (String codePath : codePaths) { |
| packageUseInfo.mergeCodePathUsedByOtherApps(codePath, true, null, null); |
| } |
| } else if (!packageUseInfo.isAnyCodePathUsedByOtherApps() |
| && packageUseInfo.mDexUseInfoMap.isEmpty()) { |
| // The package is not used by other apps and we removed all its dex files |
| // records. Remove the entire package record as well. |
| pIt.remove(); |
| } |
| } |
| } |
| } |
| } |
| |
| /** |
| * Clears the {@code usesByOtherApps} marker for the package {@code packageName}. |
| * @return true if the package usage info was updated. |
| */ |
| /*package*/ boolean clearUsedByOtherApps(String packageName) { |
| synchronized (mPackageUseInfoMap) { |
| PackageUseInfo packageUseInfo = mPackageUseInfoMap.get(packageName); |
| if (packageUseInfo == null) { |
| return false; |
| } |
| return packageUseInfo.clearCodePathUsedByOtherApps(); |
| } |
| } |
| |
| /** |
| * Remove the usage data associated with package {@code packageName}. |
| * @return true if the package usage was found and removed successfully. |
| */ |
| /* package */ boolean removePackage(String packageName) { |
| synchronized (mPackageUseInfoMap) { |
| return mPackageUseInfoMap.remove(packageName) != null; |
| } |
| } |
| |
| /** |
| * Remove all the records about package {@code packageName} belonging to user {@code userId}. |
| * If the package is left with no records of secondary dex usage and is not used by other |
| * apps it will be removed as well. |
| * @return true if the record was found and actually deleted, |
| * false if the record doesn't exist |
| */ |
| /*package*/ boolean removeUserPackage(String packageName, int userId) { |
| synchronized (mPackageUseInfoMap) { |
| PackageUseInfo packageUseInfo = mPackageUseInfoMap.get(packageName); |
| if (packageUseInfo == null) { |
| return false; |
| } |
| boolean updated = false; |
| Iterator<Map.Entry<String, DexUseInfo>> dIt = |
| packageUseInfo.mDexUseInfoMap.entrySet().iterator(); |
| while (dIt.hasNext()) { |
| DexUseInfo dexUseInfo = dIt.next().getValue(); |
| if (dexUseInfo.mOwnerUserId == userId) { |
| dIt.remove(); |
| updated = true; |
| } |
| } |
| // If no secondary dex info is left and the package is not used by other apps |
| // remove the data since it is now useless. |
| if (packageUseInfo.mDexUseInfoMap.isEmpty() |
| && !packageUseInfo.isAnyCodePathUsedByOtherApps()) { |
| mPackageUseInfoMap.remove(packageName); |
| updated = true; |
| } |
| return updated; |
| } |
| } |
| |
| /** |
| * Remove the secondary dex file record belonging to the package {@code packageName} |
| * and user {@code userId}. |
| * @return true if the record was found and actually deleted, |
| * false if the record doesn't exist |
| */ |
| /*package*/ boolean removeDexFile(String packageName, String dexFile, int userId) { |
| synchronized (mPackageUseInfoMap) { |
| PackageUseInfo packageUseInfo = mPackageUseInfoMap.get(packageName); |
| if (packageUseInfo == null) { |
| return false; |
| } |
| return removeDexFile(packageUseInfo, dexFile, userId); |
| } |
| } |
| |
| private boolean removeDexFile(PackageUseInfo packageUseInfo, String dexFile, int userId) { |
| DexUseInfo dexUseInfo = packageUseInfo.mDexUseInfoMap.get(dexFile); |
| if (dexUseInfo == null) { |
| return false; |
| } |
| if (dexUseInfo.mOwnerUserId == userId) { |
| packageUseInfo.mDexUseInfoMap.remove(dexFile); |
| return true; |
| } |
| return false; |
| } |
| |
| /*package*/ PackageUseInfo getPackageUseInfo(String packageName) { |
| synchronized (mPackageUseInfoMap) { |
| PackageUseInfo useInfo = mPackageUseInfoMap.get(packageName); |
| // The useInfo contains a map for secondary dex files which could be modified |
| // concurrently after this method returns and thus outside the locking we do here. |
| // (i.e. the map is updated when new class loaders are created, which can happen anytime |
| // after this method returns) |
| // Make a defensive copy to be sure we don't get concurrent modifications. |
| return useInfo == null ? null : new PackageUseInfo(useInfo); |
| } |
| } |
| |
| /** |
| * Return all packages that contain records of secondary dex files. |
| */ |
| /*package*/ Set<String> getAllPackagesWithSecondaryDexFiles() { |
| Set<String> packages = new HashSet<>(); |
| synchronized (mPackageUseInfoMap) { |
| for (Map.Entry<String, PackageUseInfo> entry : mPackageUseInfoMap.entrySet()) { |
| if (!entry.getValue().mDexUseInfoMap.isEmpty()) { |
| packages.add(entry.getKey()); |
| } |
| } |
| } |
| return packages; |
| } |
| |
| /* package */ void clear() { |
| synchronized (mPackageUseInfoMap) { |
| mPackageUseInfoMap.clear(); |
| } |
| } |
| |
| // Creates a deep copy of the class' mPackageUseInfoMap. |
| private Map<String, PackageUseInfo> clonePackageUseInfoMap() { |
| Map<String, PackageUseInfo> clone = new HashMap<>(); |
| synchronized (mPackageUseInfoMap) { |
| for (Map.Entry<String, PackageUseInfo> e : mPackageUseInfoMap.entrySet()) { |
| clone.put(e.getKey(), new PackageUseInfo(e.getValue())); |
| } |
| } |
| return clone; |
| } |
| |
| private String writeBoolean(boolean bool) { |
| return bool ? "1" : "0"; |
| } |
| |
| private boolean readBoolean(String bool) { |
| if ("0".equals(bool)) return false; |
| if ("1".equals(bool)) return true; |
| throw new IllegalArgumentException("Unknown bool encoding: " + bool); |
| } |
| |
| /* package */ String dump() { |
| StringWriter sw = new StringWriter(); |
| write(sw); |
| return sw.toString(); |
| } |
| |
| /** |
| * Stores data on how a package and its dex files are used. |
| */ |
| public static class PackageUseInfo { |
| // The app's code paths that are used by other apps. |
| // The key is the code path and the value is the set of loading packages. |
| private final Map<String, Set<String>> mCodePathsUsedByOtherApps; |
| // Map dex paths to their data (isUsedByOtherApps, owner id, loader isa). |
| private final Map<String, DexUseInfo> mDexUseInfoMap; |
| |
| // Keeps track of whether or not this package was used by other apps before |
| // we upgraded to VERSION 4 which records the info for each code path separately. |
| // This is unwanted complexity but without it we risk to profile guide compile |
| // something that supposed to be shared. For example: |
| // 1) we determine that chrome is used by another app |
| // 2) we take an OTA which upgrades the way we keep track of usage data |
| // 3) chrome doesn't get used until the background job executes |
| // 4) as part of the backgound job we now think that chrome is not used by others |
| // and we speed-profile. |
| // 5) as a result the next time someone uses chrome it will extract from apk since |
| // the compiled code will be private. |
| private boolean mUsedByOtherAppsBeforeUpgrade; |
| |
| /*package*/ PackageUseInfo() { |
| mCodePathsUsedByOtherApps = new HashMap<>(); |
| mDexUseInfoMap = new HashMap<>(); |
| } |
| |
| // Creates a deep copy of the `other`. |
| private PackageUseInfo(PackageUseInfo other) { |
| mCodePathsUsedByOtherApps = new HashMap<>(); |
| for (Map.Entry<String, Set<String>> e : other.mCodePathsUsedByOtherApps.entrySet()) { |
| mCodePathsUsedByOtherApps.put(e.getKey(), new HashSet<>(e.getValue())); |
| } |
| |
| mDexUseInfoMap = new HashMap<>(); |
| for (Map.Entry<String, DexUseInfo> e : other.mDexUseInfoMap.entrySet()) { |
| mDexUseInfoMap.put(e.getKey(), new DexUseInfo(e.getValue())); |
| } |
| } |
| |
| private boolean mergeCodePathUsedByOtherApps(String codePath, boolean isUsedByOtherApps, |
| String owningPackageName, String loadingPackage) { |
| if (!isUsedByOtherApps) { |
| // Nothing to update if the the code path is not used by other apps. |
| return false; |
| } |
| |
| boolean newCodePath = false; |
| Set<String> loadingPackages = mCodePathsUsedByOtherApps.get(codePath); |
| if (loadingPackages == null) { |
| loadingPackages = new HashSet<>(); |
| mCodePathsUsedByOtherApps.put(codePath, loadingPackages); |
| newCodePath = true; |
| } |
| boolean newLoadingPackage = loadingPackage != null |
| && !loadingPackage.equals(owningPackageName) |
| && loadingPackages.add(loadingPackage); |
| return newCodePath || newLoadingPackage; |
| } |
| |
| public boolean isUsedByOtherApps(String codePath) { |
| return mCodePathsUsedByOtherApps.containsKey(codePath); |
| } |
| |
| public Map<String, DexUseInfo> getDexUseInfoMap() { |
| return mDexUseInfoMap; |
| } |
| |
| public Set<String> getLoadingPackages(String codePath) { |
| return mCodePathsUsedByOtherApps.getOrDefault(codePath, null); |
| } |
| |
| public boolean isAnyCodePathUsedByOtherApps() { |
| return !mCodePathsUsedByOtherApps.isEmpty(); |
| } |
| |
| /** |
| * Clears the usedByOtherApps markers from all code paths. |
| * Returns whether or not there was an update. |
| */ |
| /*package*/ boolean clearCodePathUsedByOtherApps() { |
| // Update mUsedByOtherAppsBeforeUpgrade as well to be consistent with |
| // the new data. This is not saved to disk so we don't need to return it. |
| mUsedByOtherAppsBeforeUpgrade = true; |
| |
| if (mCodePathsUsedByOtherApps.isEmpty()) { |
| return false; |
| } else { |
| mCodePathsUsedByOtherApps.clear(); |
| return true; |
| } |
| } |
| } |
| |
| /** |
| * Stores data about a loaded dex files. |
| */ |
| public static class DexUseInfo { |
| private boolean mIsUsedByOtherApps; |
| private final int mOwnerUserId; |
| // The class loader context for the dex file. This encodes the class loader chain |
| // (class loader type + class path) in a format compatible to dex2oat. |
| // See {@code DexoptUtils.processContextForDexLoad}. |
| private String mClassLoaderContext; |
| // The instructions sets of the applications loading the dex file. |
| private final Set<String> mLoaderIsas; |
| // Packages who load this dex file. |
| private final Set<String> mLoadingPackages; |
| |
| @VisibleForTesting |
| /* package */ DexUseInfo(boolean isUsedByOtherApps, int ownerUserId, |
| String classLoaderContext, String loaderIsa) { |
| mIsUsedByOtherApps = isUsedByOtherApps; |
| mOwnerUserId = ownerUserId; |
| mClassLoaderContext = classLoaderContext; |
| mLoaderIsas = new HashSet<>(); |
| if (loaderIsa != null) { |
| mLoaderIsas.add(loaderIsa); |
| } |
| mLoadingPackages = new HashSet<>(); |
| } |
| |
| // Creates a deep copy of the `other`. |
| private DexUseInfo(DexUseInfo other) { |
| mIsUsedByOtherApps = other.mIsUsedByOtherApps; |
| mOwnerUserId = other.mOwnerUserId; |
| mClassLoaderContext = other.mClassLoaderContext; |
| mLoaderIsas = new HashSet<>(other.mLoaderIsas); |
| mLoadingPackages = new HashSet<>(other.mLoadingPackages); |
| } |
| |
| private boolean merge(DexUseInfo dexUseInfo) { |
| boolean oldIsUsedByOtherApps = mIsUsedByOtherApps; |
| mIsUsedByOtherApps = mIsUsedByOtherApps || dexUseInfo.mIsUsedByOtherApps; |
| boolean updateIsas = mLoaderIsas.addAll(dexUseInfo.mLoaderIsas); |
| boolean updateLoadingPackages = mLoadingPackages.addAll(dexUseInfo.mLoadingPackages); |
| |
| String oldClassLoaderContext = mClassLoaderContext; |
| if (UNKNOWN_CLASS_LOADER_CONTEXT.equals(mClassLoaderContext)) { |
| // Can happen if we read a previous version. |
| mClassLoaderContext = dexUseInfo.mClassLoaderContext; |
| } else if (!Objects.equals(mClassLoaderContext, dexUseInfo.mClassLoaderContext)) { |
| // We detected a context change. |
| mClassLoaderContext = VARIABLE_CLASS_LOADER_CONTEXT; |
| } |
| |
| return updateIsas || |
| (oldIsUsedByOtherApps != mIsUsedByOtherApps) || |
| updateLoadingPackages |
| || !Objects.equals(oldClassLoaderContext, mClassLoaderContext); |
| } |
| |
| public boolean isUsedByOtherApps() { |
| return mIsUsedByOtherApps; |
| } |
| |
| /* package */ int getOwnerUserId() { |
| return mOwnerUserId; |
| } |
| |
| public Set<String> getLoaderIsas() { |
| return mLoaderIsas; |
| } |
| |
| public Set<String> getLoadingPackages() { |
| return mLoadingPackages; |
| } |
| |
| public String getClassLoaderContext() { return mClassLoaderContext; } |
| |
| public boolean isUnknownClassLoaderContext() { |
| // The class loader context may be unknown if we loaded the data from a previous version |
| // which didn't save the context. |
| return UNKNOWN_CLASS_LOADER_CONTEXT.equals(mClassLoaderContext); |
| } |
| |
| public boolean isVariableClassLoaderContext() { |
| return VARIABLE_CLASS_LOADER_CONTEXT.equals(mClassLoaderContext); |
| } |
| } |
| } |