Aurimas Liutikas | 88c7ff1 | 2023-08-10 12:42:26 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2021 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.annotation.Nullable; |
| 20 | import android.content.pm.SharedLibraryInfo; |
| 21 | |
| 22 | import com.android.server.pm.pkg.PackageStateInternal; |
| 23 | import com.android.server.pm.pkg.SharedLibraryWrapper; |
| 24 | import com.android.server.utils.WatchedLongSparseArray; |
| 25 | |
| 26 | import java.util.ArrayList; |
| 27 | import java.util.Collections; |
| 28 | import java.util.HashSet; |
| 29 | import java.util.List; |
| 30 | import java.util.Map; |
| 31 | import java.util.Set; |
| 32 | |
| 33 | final class SharedLibraryUtils { |
| 34 | |
| 35 | /** |
| 36 | * Returns false if the adding shared library already exists in the map and so could not be |
| 37 | * added. |
| 38 | */ |
| 39 | public static boolean addSharedLibraryToPackageVersionMap( |
| 40 | Map<String, WatchedLongSparseArray<SharedLibraryInfo>> target, |
| 41 | SharedLibraryInfo library) { |
| 42 | final String name = library.getName(); |
| 43 | if (target.containsKey(name)) { |
| 44 | if (library.getType() != SharedLibraryInfo.TYPE_STATIC) { |
| 45 | // We've already added this non-version-specific library to the map. |
| 46 | return false; |
| 47 | } else if (target.get(name).indexOfKey(library.getLongVersion()) >= 0) { |
| 48 | // We've already added this version of a version-specific library to the map. |
| 49 | return false; |
| 50 | } |
| 51 | } else { |
| 52 | target.put(name, new WatchedLongSparseArray<>()); |
| 53 | } |
| 54 | target.get(name).put(library.getLongVersion(), library); |
| 55 | return true; |
| 56 | } |
| 57 | |
| 58 | @Nullable |
| 59 | public static SharedLibraryInfo getSharedLibraryInfo(String name, long version, |
| 60 | Map<String, WatchedLongSparseArray<SharedLibraryInfo>> existingLibraries, |
| 61 | @Nullable Map<String, WatchedLongSparseArray<SharedLibraryInfo>> newLibraries) { |
| 62 | if (newLibraries != null) { |
| 63 | final WatchedLongSparseArray<SharedLibraryInfo> versionedLib = newLibraries.get(name); |
| 64 | SharedLibraryInfo info = null; |
| 65 | if (versionedLib != null) { |
| 66 | info = versionedLib.get(version); |
| 67 | } |
| 68 | if (info != null) { |
| 69 | return info; |
| 70 | } |
| 71 | } |
| 72 | final WatchedLongSparseArray<SharedLibraryInfo> versionedLib = existingLibraries.get(name); |
| 73 | if (versionedLib == null) { |
| 74 | return null; |
| 75 | } |
| 76 | return versionedLib.get(version); |
| 77 | } |
| 78 | |
| 79 | public static List<SharedLibraryInfo> findSharedLibraries(PackageStateInternal pkgSetting) { |
| 80 | if (!pkgSetting.getTransientState().getUsesLibraryInfos().isEmpty()) { |
| 81 | ArrayList<SharedLibraryInfo> retValue = new ArrayList<>(); |
| 82 | Set<String> collectedNames = new HashSet<>(); |
| 83 | for (SharedLibraryWrapper info : pkgSetting.getTransientState().getUsesLibraryInfos()) { |
| 84 | findSharedLibrariesRecursive(info.getInfo(), retValue, collectedNames); |
| 85 | } |
| 86 | return retValue; |
| 87 | } else { |
| 88 | return Collections.emptyList(); |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | private static void findSharedLibrariesRecursive(SharedLibraryInfo info, |
| 93 | ArrayList<SharedLibraryInfo> collected, Set<String> collectedNames) { |
| 94 | if (!collectedNames.contains(info.getName())) { |
| 95 | collectedNames.add(info.getName()); |
| 96 | collected.add(info); |
| 97 | |
| 98 | if (info.getDependencies() != null) { |
| 99 | for (SharedLibraryInfo dep : info.getDependencies()) { |
| 100 | findSharedLibrariesRecursive(dep, collected, collectedNames); |
| 101 | } |
| 102 | } |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | } |