Mathew Inwood | e188acc | 2019-06-20 15:13:33 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2019 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.compat; |
| 18 | |
atrost | f69bbe1 | 2019-11-06 16:00:38 +0000 | [diff] [blame] | 19 | import android.app.ActivityManager; |
| 20 | import android.app.IActivityManager; |
Andrei Onea | 6cd9d4d | 2019-07-17 19:03:10 +0100 | [diff] [blame] | 21 | import android.content.Context; |
Mathew Inwood | e188acc | 2019-06-20 15:13:33 +0100 | [diff] [blame] | 22 | import android.content.pm.ApplicationInfo; |
atrost | 12d0da3 | 2019-09-18 12:48:44 +0100 | [diff] [blame] | 23 | import android.content.pm.PackageManager; |
atrost | f69bbe1 | 2019-11-06 16:00:38 +0000 | [diff] [blame] | 24 | import android.os.Binder; |
| 25 | import android.os.RemoteException; |
atrost | 5076854 | 2019-10-22 19:44:09 +0100 | [diff] [blame] | 26 | import android.os.UserHandle; |
Mathew Inwood | e188acc | 2019-06-20 15:13:33 +0100 | [diff] [blame] | 27 | import android.util.Slog; |
atrost | e36b1a1 | 2019-08-28 15:40:37 +0100 | [diff] [blame] | 28 | import android.util.StatsLog; |
Mathew Inwood | e188acc | 2019-06-20 15:13:33 +0100 | [diff] [blame] | 29 | |
atrost | e36b1a1 | 2019-08-28 15:40:37 +0100 | [diff] [blame] | 30 | import com.android.internal.compat.ChangeReporter; |
Andrei Onea | ea997f2 | 2019-09-12 18:08:59 +0100 | [diff] [blame] | 31 | import com.android.internal.compat.CompatibilityChangeConfig; |
Andrei Onea | 18041f78 | 2019-10-01 14:34:56 +0100 | [diff] [blame] | 32 | import com.android.internal.compat.CompatibilityChangeInfo; |
atrost | a6a4d60 | 2019-08-21 16:48:56 +0100 | [diff] [blame] | 33 | import com.android.internal.compat.IPlatformCompat; |
Andrei Onea | 6cd9d4d | 2019-07-17 19:03:10 +0100 | [diff] [blame] | 34 | import com.android.internal.util.DumpUtils; |
| 35 | |
| 36 | import java.io.FileDescriptor; |
| 37 | import java.io.PrintWriter; |
| 38 | |
Mathew Inwood | e188acc | 2019-06-20 15:13:33 +0100 | [diff] [blame] | 39 | /** |
| 40 | * System server internal API for gating and reporting compatibility changes. |
| 41 | */ |
Andrei Onea | 6cd9d4d | 2019-07-17 19:03:10 +0100 | [diff] [blame] | 42 | public class PlatformCompat extends IPlatformCompat.Stub { |
Mathew Inwood | e188acc | 2019-06-20 15:13:33 +0100 | [diff] [blame] | 43 | |
| 44 | private static final String TAG = "Compatibility"; |
| 45 | |
Andrei Onea | 6cd9d4d | 2019-07-17 19:03:10 +0100 | [diff] [blame] | 46 | private final Context mContext; |
atrost | e36b1a1 | 2019-08-28 15:40:37 +0100 | [diff] [blame] | 47 | private final ChangeReporter mChangeReporter; |
Andrei Onea | 6cd9d4d | 2019-07-17 19:03:10 +0100 | [diff] [blame] | 48 | |
| 49 | public PlatformCompat(Context context) { |
| 50 | mContext = context; |
atrost | 6624ffa | 2019-09-20 16:30:07 +0100 | [diff] [blame] | 51 | mChangeReporter = new ChangeReporter( |
| 52 | StatsLog.APP_COMPATIBILITY_CHANGE_REPORTED__SOURCE__SYSTEM_SERVER); |
Andrei Onea | 6cd9d4d | 2019-07-17 19:03:10 +0100 | [diff] [blame] | 53 | } |
| 54 | |
| 55 | @Override |
| 56 | public void reportChange(long changeId, ApplicationInfo appInfo) { |
atrost | 64cacec | 2019-10-03 15:21:24 +0100 | [diff] [blame] | 57 | reportChange(changeId, appInfo.uid, |
| 58 | StatsLog.APP_COMPATIBILITY_CHANGE_REPORTED__STATE__LOGGED); |
Mathew Inwood | e188acc | 2019-06-20 15:13:33 +0100 | [diff] [blame] | 59 | } |
| 60 | |
Andrei Onea | 6cd9d4d | 2019-07-17 19:03:10 +0100 | [diff] [blame] | 61 | @Override |
atrost | 5076854 | 2019-10-22 19:44:09 +0100 | [diff] [blame] | 62 | public void reportChangeByPackageName(long changeId, String packageName, int userId) { |
| 63 | ApplicationInfo appInfo = getApplicationInfo(packageName, userId); |
atrost | 12d0da3 | 2019-09-18 12:48:44 +0100 | [diff] [blame] | 64 | if (appInfo == null) { |
| 65 | return; |
| 66 | } |
| 67 | reportChange(changeId, appInfo); |
| 68 | } |
| 69 | |
| 70 | @Override |
atrost | 64cacec | 2019-10-03 15:21:24 +0100 | [diff] [blame] | 71 | public void reportChangeByUid(long changeId, int uid) { |
| 72 | reportChange(changeId, uid, StatsLog.APP_COMPATIBILITY_CHANGE_REPORTED__STATE__LOGGED); |
| 73 | } |
| 74 | |
| 75 | @Override |
Andrei Onea | 6cd9d4d | 2019-07-17 19:03:10 +0100 | [diff] [blame] | 76 | public boolean isChangeEnabled(long changeId, ApplicationInfo appInfo) { |
Mathew Inwood | e188acc | 2019-06-20 15:13:33 +0100 | [diff] [blame] | 77 | if (CompatConfig.get().isChangeEnabled(changeId, appInfo)) { |
atrost | 64cacec | 2019-10-03 15:21:24 +0100 | [diff] [blame] | 78 | reportChange(changeId, appInfo.uid, |
atrost | e36b1a1 | 2019-08-28 15:40:37 +0100 | [diff] [blame] | 79 | StatsLog.APP_COMPATIBILITY_CHANGE_REPORTED__STATE__ENABLED); |
Mathew Inwood | e188acc | 2019-06-20 15:13:33 +0100 | [diff] [blame] | 80 | return true; |
| 81 | } |
atrost | 64cacec | 2019-10-03 15:21:24 +0100 | [diff] [blame] | 82 | reportChange(changeId, appInfo.uid, |
atrost | e36b1a1 | 2019-08-28 15:40:37 +0100 | [diff] [blame] | 83 | StatsLog.APP_COMPATIBILITY_CHANGE_REPORTED__STATE__DISABLED); |
Mathew Inwood | e188acc | 2019-06-20 15:13:33 +0100 | [diff] [blame] | 84 | return false; |
| 85 | } |
Andrei Onea | 6cd9d4d | 2019-07-17 19:03:10 +0100 | [diff] [blame] | 86 | |
| 87 | @Override |
atrost | 5076854 | 2019-10-22 19:44:09 +0100 | [diff] [blame] | 88 | public boolean isChangeEnabledByPackageName(long changeId, String packageName, int userId) { |
| 89 | ApplicationInfo appInfo = getApplicationInfo(packageName, userId); |
atrost | 12d0da3 | 2019-09-18 12:48:44 +0100 | [diff] [blame] | 90 | if (appInfo == null) { |
| 91 | return true; |
| 92 | } |
| 93 | return isChangeEnabled(changeId, appInfo); |
| 94 | } |
| 95 | |
| 96 | @Override |
atrost | 64cacec | 2019-10-03 15:21:24 +0100 | [diff] [blame] | 97 | public boolean isChangeEnabledByUid(long changeId, int uid) { |
| 98 | String[] packages = mContext.getPackageManager().getPackagesForUid(uid); |
| 99 | if (packages == null || packages.length == 0) { |
| 100 | return true; |
| 101 | } |
| 102 | boolean enabled = true; |
| 103 | for (String packageName : packages) { |
atrost | 5076854 | 2019-10-22 19:44:09 +0100 | [diff] [blame] | 104 | enabled = enabled && isChangeEnabledByPackageName(changeId, packageName, |
| 105 | UserHandle.getUserId(uid)); |
atrost | 64cacec | 2019-10-03 15:21:24 +0100 | [diff] [blame] | 106 | } |
| 107 | return enabled; |
| 108 | } |
| 109 | |
| 110 | @Override |
Andrei Onea | ea997f2 | 2019-09-12 18:08:59 +0100 | [diff] [blame] | 111 | public void setOverrides(CompatibilityChangeConfig overrides, String packageName) { |
| 112 | CompatConfig.get().addOverrides(overrides, packageName); |
atrost | f69bbe1 | 2019-11-06 16:00:38 +0000 | [diff] [blame] | 113 | killPackage(packageName); |
| 114 | } |
| 115 | |
| 116 | @Override |
| 117 | public void setOverridesForTest(CompatibilityChangeConfig overrides, String packageName) { |
| 118 | CompatConfig.get().addOverrides(overrides, packageName); |
Andrei Onea | ea997f2 | 2019-09-12 18:08:59 +0100 | [diff] [blame] | 119 | } |
| 120 | |
| 121 | @Override |
| 122 | public void clearOverrides(String packageName) { |
| 123 | CompatConfig config = CompatConfig.get(); |
| 124 | config.removePackageOverrides(packageName); |
atrost | f69bbe1 | 2019-11-06 16:00:38 +0000 | [diff] [blame] | 125 | killPackage(packageName); |
| 126 | } |
| 127 | |
| 128 | @Override |
Andrei Onea | 02d81c0 | 2019-11-18 14:21:44 +0000 | [diff] [blame] | 129 | public void clearOverridesForTest(String packageName) { |
| 130 | CompatConfig config = CompatConfig.get(); |
| 131 | config.removePackageOverrides(packageName); |
| 132 | } |
| 133 | |
| 134 | @Override |
atrost | f69bbe1 | 2019-11-06 16:00:38 +0000 | [diff] [blame] | 135 | public boolean clearOverride(long changeId, String packageName) { |
| 136 | boolean existed = CompatConfig.get().removeOverride(changeId, packageName); |
| 137 | killPackage(packageName); |
| 138 | return existed; |
Andrei Onea | ea997f2 | 2019-09-12 18:08:59 +0100 | [diff] [blame] | 139 | } |
| 140 | |
| 141 | @Override |
Andrei Onea | 18041f78 | 2019-10-01 14:34:56 +0100 | [diff] [blame] | 142 | public CompatibilityChangeConfig getAppConfig(ApplicationInfo appInfo) { |
| 143 | return CompatConfig.get().getAppConfig(appInfo); |
| 144 | } |
| 145 | |
| 146 | @Override |
| 147 | public CompatibilityChangeInfo[] listAllChanges() { |
| 148 | return CompatConfig.get().dumpChanges(); |
| 149 | } |
| 150 | |
atrost | f69bbe1 | 2019-11-06 16:00:38 +0000 | [diff] [blame] | 151 | /** |
| 152 | * Check whether the change is known to the compat config. |
| 153 | * @param changeId |
| 154 | * @return {@code true} if the change is known. |
| 155 | */ |
| 156 | public boolean isKnownChangeId(long changeId) { |
| 157 | return CompatConfig.get().isKnownChangeId(changeId); |
| 158 | |
| 159 | } |
| 160 | |
| 161 | /** |
| 162 | * Retrieves the set of disabled changes for a given app. Any change ID not in the returned |
| 163 | * array is by default enabled for the app. |
| 164 | * |
| 165 | * @param appInfo The app in question |
| 166 | * @return A sorted long array of change IDs. We use a primitive array to minimize memory |
| 167 | * footprint: Every app process will store this array statically so we aim to reduce |
| 168 | * overhead as much as possible. |
| 169 | */ |
| 170 | public long[] getDisabledChanges(ApplicationInfo appInfo) { |
| 171 | return CompatConfig.get().getDisabledChanges(appInfo); |
| 172 | } |
| 173 | |
| 174 | /** |
| 175 | * Look up a change ID by name. |
| 176 | * |
| 177 | * @param name Name of the change to look up |
| 178 | * @return The change ID, or {@code -1} if no change with that name exists. |
| 179 | */ |
| 180 | public long lookupChangeId(String name) { |
| 181 | return CompatConfig.get().lookupChangeId(name); |
| 182 | } |
| 183 | |
Andrei Onea | 18041f78 | 2019-10-01 14:34:56 +0100 | [diff] [blame] | 184 | @Override |
Andrei Onea | 6cd9d4d | 2019-07-17 19:03:10 +0100 | [diff] [blame] | 185 | protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { |
| 186 | if (!DumpUtils.checkDumpAndUsageStatsPermission(mContext, "platform_compat", pw)) return; |
Andrei Onea | c61bf0c | 2019-07-10 16:43:09 +0100 | [diff] [blame] | 187 | CompatConfig.get().dumpConfig(pw); |
Andrei Onea | 6cd9d4d | 2019-07-17 19:03:10 +0100 | [diff] [blame] | 188 | } |
atrost | e36b1a1 | 2019-08-28 15:40:37 +0100 | [diff] [blame] | 189 | |
atrost | 893f84d | 2019-09-30 11:29:44 +0100 | [diff] [blame] | 190 | /** |
| 191 | * Clears information stored about events reported on behalf of an app. |
| 192 | * To be called once upon app start or end. A second call would be a no-op. |
| 193 | * @param appInfo the app to reset |
| 194 | */ |
| 195 | public void resetReporting(ApplicationInfo appInfo) { |
| 196 | mChangeReporter.resetReportedChanges(appInfo.uid); |
| 197 | } |
| 198 | |
atrost | 5076854 | 2019-10-22 19:44:09 +0100 | [diff] [blame] | 199 | private ApplicationInfo getApplicationInfo(String packageName, int userId) { |
atrost | 12d0da3 | 2019-09-18 12:48:44 +0100 | [diff] [blame] | 200 | try { |
atrost | 5076854 | 2019-10-22 19:44:09 +0100 | [diff] [blame] | 201 | return mContext.getPackageManager().getApplicationInfoAsUser(packageName, 0, userId); |
atrost | 12d0da3 | 2019-09-18 12:48:44 +0100 | [diff] [blame] | 202 | } catch (PackageManager.NameNotFoundException e) { |
| 203 | Slog.e(TAG, "No installed package " + packageName); |
| 204 | } |
| 205 | return null; |
| 206 | } |
| 207 | |
atrost | 64cacec | 2019-10-03 15:21:24 +0100 | [diff] [blame] | 208 | private void reportChange(long changeId, int uid, int state) { |
atrost | 6624ffa | 2019-09-20 16:30:07 +0100 | [diff] [blame] | 209 | mChangeReporter.reportChange(uid, changeId, state); |
atrost | e36b1a1 | 2019-08-28 15:40:37 +0100 | [diff] [blame] | 210 | } |
atrost | f69bbe1 | 2019-11-06 16:00:38 +0000 | [diff] [blame] | 211 | |
| 212 | private void killPackage(String packageName) { |
| 213 | int uid = -1; |
| 214 | try { |
| 215 | uid = mContext.getPackageManager().getPackageUid(packageName, 0); |
| 216 | } catch (PackageManager.NameNotFoundException e) { |
| 217 | Slog.w(TAG, "Didn't find package " + packageName + " on device.", e); |
| 218 | return; |
| 219 | } |
| 220 | |
| 221 | Slog.d(TAG, "Killing package " + packageName + " (UID " + uid + ")."); |
| 222 | killUid(UserHandle.getAppId(uid), |
| 223 | UserHandle.USER_ALL, "PlatformCompat overrides"); |
| 224 | } |
| 225 | |
| 226 | private void killUid(int appId, int userId, String reason) { |
| 227 | final long identity = Binder.clearCallingIdentity(); |
| 228 | try { |
| 229 | IActivityManager am = ActivityManager.getService(); |
| 230 | if (am != null) { |
| 231 | try { |
| 232 | am.killUid(appId, userId, reason); |
| 233 | } catch (RemoteException e) { |
| 234 | /* ignore - same process */ |
| 235 | } |
| 236 | } |
| 237 | } finally { |
| 238 | Binder.restoreCallingIdentity(identity); |
| 239 | } |
| 240 | } |
Mathew Inwood | e188acc | 2019-06-20 15:13:33 +0100 | [diff] [blame] | 241 | } |