services/core/java/com/android/server/wm/ActivityTaskManagerService.java

/*
 * Copyright (C) 2018 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.wm;

import static android.Manifest.permission.BIND_VOICE_INTERACTION;
import static android.Manifest.permission.CHANGE_CONFIGURATION;
import static android.Manifest.permission.CONTROL_REMOTE_APP_TRANSITION_ANIMATIONS;
import static android.Manifest.permission.INTERACT_ACROSS_USERS;
import static android.Manifest.permission.INTERACT_ACROSS_USERS_FULL;
import static android.Manifest.permission.INTERNAL_SYSTEM_WINDOW;
import static android.Manifest.permission.MANAGE_ACTIVITY_STACKS;
import static android.Manifest.permission.READ_FRAME_BUFFER;
import static android.Manifest.permission.REMOVE_TASKS;
import static android.Manifest.permission.START_TASKS_FROM_RECENTS;
import static android.Manifest.permission.STOP_APP_SWITCHES;
import static android.app.ActivityManager.LOCK_TASK_MODE_NONE;
import static android.app.ActivityManagerInternal.ALLOW_NON_FULL;
import static android.app.ActivityTaskManager.INVALID_TASK_ID;
import static android.app.ActivityTaskManager.RESIZE_MODE_PRESERVE_WINDOW;
import static android.app.ActivityTaskManager.SPLIT_SCREEN_CREATE_MODE_TOP_OR_LEFT;
import static android.app.WindowConfiguration.ACTIVITY_TYPE_UNDEFINED;
import static android.app.WindowConfiguration.WINDOWING_MODE_FREEFORM;
import static android.app.WindowConfiguration.WINDOWING_MODE_FULLSCREEN;
import static android.app.WindowConfiguration.WINDOWING_MODE_PINNED;
import static android.app.WindowConfiguration.WINDOWING_MODE_SPLIT_SCREEN_PRIMARY;
import static android.app.WindowConfiguration.WINDOWING_MODE_UNDEFINED;
import static android.content.Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS;
import static android.content.Intent.FLAG_ACTIVITY_NEW_TASK;
import static android.content.pm.ApplicationInfo.FLAG_FACTORY_TEST;
import static android.content.pm.ConfigurationInfo.GL_ES_VERSION_UNDEFINED;
import static android.content.pm.PackageManager.FEATURE_ACTIVITIES_ON_SECONDARY_DISPLAYS;
import static android.content.pm.PackageManager.FEATURE_FREEFORM_WINDOW_MANAGEMENT;
import static android.content.pm.PackageManager.FEATURE_PICTURE_IN_PICTURE;
import static android.content.pm.PackageManager.PERMISSION_GRANTED;
import static android.os.FactoryTest.FACTORY_TEST_HIGH_LEVEL;
import static android.os.FactoryTest.FACTORY_TEST_LOW_LEVEL;
import static android.os.FactoryTest.FACTORY_TEST_OFF;
import static android.os.Process.FIRST_APPLICATION_UID;
import static android.os.Process.SYSTEM_UID;
import static android.os.Trace.TRACE_TAG_WINDOW_MANAGER;
import static android.provider.Settings.Global.DEVELOPMENT_ENABLE_FREEFORM_WINDOWS_SUPPORT;
import static android.provider.Settings.Global.DEVELOPMENT_ENABLE_SIZECOMPAT_FREEFORM;
import static android.provider.Settings.Global.DEVELOPMENT_FORCE_RESIZABLE_ACTIVITIES;
import static android.provider.Settings.Global.DEVELOPMENT_FORCE_RTL;
import static android.provider.Settings.Global.HIDE_ERROR_DIALOGS;
import static android.provider.Settings.System.FONT_SCALE;
import static android.service.voice.VoiceInteractionSession.SHOW_SOURCE_APPLICATION;
import static android.text.format.DateUtils.MINUTE_IN_MILLIS;
import static android.view.Display.DEFAULT_DISPLAY;
import static android.view.Display.INVALID_DISPLAY;
import static android.view.WindowManager.TRANSIT_NONE;

import static com.android.server.am.ActivityManagerService.ANR_TRACE_DIR;
import static com.android.server.am.ActivityManagerService.MY_PID;
import static com.android.server.am.ActivityManagerService.STOCK_PM_FLAGS;
import static com.android.server.am.ActivityManagerService.dumpStackTraces;
import static com.android.server.am.ActivityManagerServiceDumpActivitiesProto.ROOT_WINDOW_CONTAINER;
import static com.android.server.am.ActivityManagerServiceDumpProcessesProto.CONFIG_WILL_CHANGE;
import static com.android.server.am.ActivityManagerServiceDumpProcessesProto.CONTROLLER;
import static com.android.server.am.ActivityManagerServiceDumpProcessesProto.CURRENT_TRACKER;
import static com.android.server.am.ActivityManagerServiceDumpProcessesProto.Controller.IS_A_MONKEY;
import static com.android.server.am.ActivityManagerServiceDumpProcessesProto.GLOBAL_CONFIGURATION;
import static com.android.server.am.ActivityManagerServiceDumpProcessesProto.GOING_TO_SLEEP;
import static com.android.server.am.ActivityManagerServiceDumpProcessesProto.HEAVY_WEIGHT_PROC;
import static com.android.server.am.ActivityManagerServiceDumpProcessesProto.HOME_PROC;
import static com.android.server.am.ActivityManagerServiceDumpProcessesProto.LAUNCHING_ACTIVITY;
import static com.android.server.am.ActivityManagerServiceDumpProcessesProto.PREVIOUS_PROC;
import static com.android.server.am.ActivityManagerServiceDumpProcessesProto.PREVIOUS_PROC_VISIBLE_TIME_MS;
import static com.android.server.am.ActivityManagerServiceDumpProcessesProto.SCREEN_COMPAT_PACKAGES;
import static com.android.server.am.ActivityManagerServiceDumpProcessesProto.ScreenCompatPackage.MODE;
import static com.android.server.am.ActivityManagerServiceDumpProcessesProto.ScreenCompatPackage.PACKAGE;
import static com.android.server.am.EventLogTags.writeBootProgressEnableScreen;
import static com.android.server.am.EventLogTags.writeConfigurationChanged;
import static com.android.server.wm.ActivityStack.ActivityState.DESTROYED;
import static com.android.server.wm.ActivityStack.ActivityState.DESTROYING;
import static com.android.server.wm.ActivityStackSupervisor.DEFER_RESUME;
import static com.android.server.wm.ActivityStackSupervisor.ON_TOP;
import static com.android.server.wm.ActivityStackSupervisor.PRESERVE_WINDOWS;
import static com.android.server.wm.ActivityStackSupervisor.REMOVE_FROM_RECENTS;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.DEBUG_ALL;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.DEBUG_CONFIGURATION;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.DEBUG_FOCUS;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.DEBUG_IMMERSIVE;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.DEBUG_LOCKTASK;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.DEBUG_STACK;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.DEBUG_SWITCH;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.DEBUG_TASKS;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.DEBUG_VISIBILITY;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.POSTFIX_CONFIGURATION;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.POSTFIX_FOCUS;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.POSTFIX_IMMERSIVE;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.POSTFIX_LOCKTASK;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.POSTFIX_STACK;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.POSTFIX_SWITCH;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.POSTFIX_VISIBILITY;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.TAG_ATM;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.TAG_WITH_CLASS_NAME;
import static com.android.server.wm.ActivityTaskManagerInternal.ASSIST_KEY_CONTENT;
import static com.android.server.wm.ActivityTaskManagerInternal.ASSIST_KEY_DATA;
import static com.android.server.wm.ActivityTaskManagerInternal.ASSIST_KEY_RECEIVER_EXTRAS;
import static com.android.server.wm.ActivityTaskManagerInternal.ASSIST_KEY_STRUCTURE;
import static com.android.server.wm.ActivityTaskManagerService.H.REPORT_TIME_TRACKER_MSG;
import static com.android.server.wm.ActivityTaskManagerService.UiHandler.DISMISS_DIALOG_UI_MSG;
import static com.android.server.wm.RecentsAnimationController.REORDER_KEEP_IN_PLACE;
import static com.android.server.wm.RecentsAnimationController.REORDER_MOVE_TO_ORIGINAL_POSITION;
import static com.android.server.wm.RootWindowContainer.MATCH_TASK_IN_STACKS_ONLY;
import static com.android.server.wm.RootWindowContainer.MATCH_TASK_IN_STACKS_OR_RECENT_TASKS;
import static com.android.server.wm.Task.LOCK_TASK_AUTH_DONT_LOCK;
import static com.android.server.wm.Task.REPARENT_KEEP_STACK_AT_FRONT;
import static com.android.server.wm.Task.REPARENT_LEAVE_STACK_IN_PLACE;

import android.Manifest;
import android.annotation.IntDef;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.annotation.UserIdInt;
import android.app.Activity;
import android.app.ActivityManager;
import android.app.ActivityManagerInternal;
import android.app.ActivityOptions;
import android.app.ActivityTaskManager;
import android.app.ActivityThread;
import android.app.AlertDialog;
import android.app.AppGlobals;
import android.app.AppOpsManager;
import android.app.Dialog;
import android.app.IActivityController;
import android.app.IActivityTaskManager;
import android.app.IApplicationThread;
import android.app.IAssistDataReceiver;
import android.app.INotificationManager;
import android.app.IRequestFinishCallback;
import android.app.ITaskOrganizerController;
import android.app.ITaskStackListener;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.PictureInPictureParams;
import android.app.ProfilerInfo;
import android.app.RemoteAction;
import android.app.WaitResult;
import android.app.WindowConfiguration;
import android.app.admin.DevicePolicyCache;
import android.app.assist.AssistContent;
import android.app.assist.AssistStructure;
import android.app.servertransaction.ClientTransaction;
import android.app.servertransaction.EnterPipRequestedItem;
import android.app.usage.UsageStatsManagerInternal;
import android.content.ActivityNotFoundException;
import android.content.ComponentName;
import android.content.ContentResolver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.IIntentSender;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.pm.ApplicationInfo;
import android.content.pm.ConfigurationInfo;
import android.content.pm.IPackageManager;
import android.content.pm.PackageManager;
import android.content.pm.PackageManagerInternal;
import android.content.pm.ParceledListSlice;
import android.content.pm.ResolveInfo;
import android.content.res.CompatibilityInfo;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.database.ContentObserver;
import android.graphics.Bitmap;
import android.graphics.Point;
import android.graphics.Rect;
import android.metrics.LogMaker;
import android.net.Uri;
import android.os.Binder;
import android.os.Build;
import android.os.Bundle;
import android.os.FactoryTest;
import android.os.FileUtils;
import android.os.Handler;
import android.os.IBinder;
import android.os.IUserManager;
import android.os.LocaleList;
import android.os.Looper;
import android.os.Message;
import android.os.PersistableBundle;
import android.os.PowerManager;
import android.os.PowerManagerInternal;
import android.os.Process;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.os.StrictMode;
import android.os.SystemClock;
import android.os.SystemProperties;
import android.os.Trace;
import android.os.UpdateLock;
import android.os.UserHandle;
import android.os.UserManager;
import android.os.WorkSource;
import android.os.storage.IStorageManager;
import android.os.storage.StorageManager;
import android.provider.Settings;
import android.service.dreams.DreamActivity;
import android.service.dreams.DreamManagerInternal;
import android.service.voice.IVoiceInteractionSession;
import android.service.voice.VoiceInteractionManagerInternal;
import android.sysprop.DisplayProperties;
import android.telecom.TelecomManager;
import android.text.TextUtils;
import android.text.format.TimeMigrationUtils;
import android.util.ArrayMap;
import android.util.ArraySet;
import android.util.Log;
import android.util.Slog;
import android.util.SparseArray;
import android.util.TimeUtils;
import android.util.proto.ProtoOutputStream;
import android.view.IRecentsAnimationRunner;
import android.view.RemoteAnimationAdapter;
import android.view.RemoteAnimationDefinition;
import android.view.WindowContainerTransaction;
import android.view.WindowManager;

import com.android.internal.R;
import com.android.internal.annotations.VisibleForTesting;
import com.android.internal.app.AssistUtils;
import com.android.internal.app.IVoiceInteractor;
import com.android.internal.app.ProcessMap;
import com.android.internal.logging.MetricsLogger;
import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
import com.android.internal.messages.nano.SystemMessageProto.SystemMessage;
import com.android.internal.notification.SystemNotificationChannels;
import com.android.internal.os.TransferPipe;
import com.android.internal.os.logging.MetricsLoggerWrapper;
import com.android.internal.policy.IKeyguardDismissCallback;
import com.android.internal.policy.KeyguardDismissCallback;
import com.android.internal.util.ArrayUtils;
import com.android.internal.util.FastPrintWriter;
import com.android.internal.util.FrameworkStatsLog;
import com.android.internal.util.function.pooled.PooledConsumer;
import com.android.internal.util.function.pooled.PooledFunction;
import com.android.internal.util.function.pooled.PooledLambda;
import com.android.server.AttributeCache;
import com.android.server.LocalServices;
import com.android.server.SystemService;
import com.android.server.SystemServiceManager;
import com.android.server.UiThread;
import com.android.server.Watchdog;
import com.android.server.am.ActivityManagerService;
import com.android.server.am.ActivityManagerServiceDumpProcessesProto;
import com.android.server.am.AppTimeTracker;
import com.android.server.am.BaseErrorDialog;
import com.android.server.am.PendingIntentController;
import com.android.server.am.PendingIntentRecord;
import com.android.server.am.UserState;
import com.android.server.firewall.IntentFirewall;
import com.android.server.inputmethod.InputMethodSystemProperty;
import com.android.server.pm.UserManagerService;
import com.android.server.policy.PermissionPolicyInternal;
import com.android.server.uri.UriGrantsManagerInternal;
import com.android.server.vr.VrManagerInternal;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileDescriptor;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.lang.ref.WeakReference;
import java.text.DateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Objects;
import java.util.Set;

/**
 * System service for managing activities and their containers (task, stacks, displays,... ).
 *
 * {@hide}
 */
public class ActivityTaskManagerService extends IActivityTaskManager.Stub {
    private static final String TAG = TAG_WITH_CLASS_NAME ? "ActivityTaskManagerService" : TAG_ATM;
    static final String TAG_STACK = TAG + POSTFIX_STACK;
    static final String TAG_SWITCH = TAG + POSTFIX_SWITCH;
    private static final String TAG_IMMERSIVE = TAG + POSTFIX_IMMERSIVE;
    private static final String TAG_FOCUS = TAG + POSTFIX_FOCUS;
    private static final String TAG_VISIBILITY = TAG + POSTFIX_VISIBILITY;
    private static final String TAG_LOCKTASK = TAG + POSTFIX_LOCKTASK;
    private static final String TAG_CONFIGURATION = TAG + POSTFIX_CONFIGURATION;

    // How long we wait until we timeout on key dispatching.
    public static final int KEY_DISPATCHING_TIMEOUT_MS = 5 * 1000;
    // How long we wait until we timeout on key dispatching during instrumentation.
    static final int INSTRUMENTATION_KEY_DISPATCHING_TIMEOUT_MS = 60 * 1000;
    // How long we permit background activity starts after an activity in the process
    // started or finished.
    static final long ACTIVITY_BG_START_GRACE_PERIOD_MS = 10 * 1000;

    /** Used to indicate that an app transition should be animated. */
    static final boolean ANIMATE = true;

    /** Hardware-reported OpenGLES version. */
    final int GL_ES_VERSION;

    public static final String DUMP_ACTIVITIES_CMD = "activities" ;
    public static final String DUMP_ACTIVITIES_SHORT_CMD = "a" ;
    public static final String DUMP_LASTANR_CMD = "lastanr" ;
    public static final String DUMP_LASTANR_TRACES_CMD = "lastanr-traces" ;
    public static final String DUMP_STARTER_CMD = "starter" ;
    public static final String DUMP_CONTAINERS_CMD = "containers" ;
    public static final String DUMP_RECENTS_CMD = "recents" ;
    public static final String DUMP_RECENTS_SHORT_CMD = "r" ;

    /** This activity is not being relaunched, or being relaunched for a non-resize reason. */
    public static final int RELAUNCH_REASON_NONE = 0;
    /** This activity is being relaunched due to windowing mode change. */
    public static final int RELAUNCH_REASON_WINDOWING_MODE_RESIZE = 1;
    /** This activity is being relaunched due to a free-resize operation. */
    public static final int RELAUNCH_REASON_FREE_RESIZE = 2;

    Context mContext;

    /**
     * This Context is themable and meant for UI display (AlertDialogs, etc.). The theme can
     * change at runtime. Use mContext for non-UI purposes.
     */
    final Context mUiContext;
    final ActivityThread mSystemThread;
    H mH;
    UiHandler mUiHandler;
    ActivityManagerInternal mAmInternal;
    UriGrantsManagerInternal mUgmInternal;
    private PackageManagerInternal mPmInternal;
    private PermissionPolicyInternal mPermissionPolicyInternal;
    @VisibleForTesting
    final ActivityTaskManagerInternal mInternal;
    PowerManagerInternal mPowerManagerInternal;
    private UsageStatsManagerInternal mUsageStatsInternal;

    PendingIntentController mPendingIntentController;
    IntentFirewall mIntentFirewall;

    /* Global service lock used by the package the owns this service. */
    final WindowManagerGlobalLock mGlobalLock = new WindowManagerGlobalLock();
    /**
     * It is the same instance as {@link #mGlobalLock}, just declared as a type that the
     * locked-region-code-injection does't recognize it. It is used to skip wrapping priority
     * booster for places that are already in the scope of another booster (e.g. computing oom-adj).
     *
     * @see WindowManagerThreadPriorityBooster
     */
    final Object mGlobalLockWithoutBoost = mGlobalLock;
    ActivityStackSupervisor mStackSupervisor;
    RootWindowContainer mRootWindowContainer;
    WindowManagerService mWindowManager;
    private UserManagerService mUserManager;
    private AppOpsManager mAppOpsManager;
    /** All active uids in the system. */
    private final MirrorActiveUids mActiveUids = new MirrorActiveUids();
    private final SparseArray<String> mPendingTempWhitelist = new SparseArray<>();
    /** All processes currently running that might have a window organized by name. */
    final ProcessMap<WindowProcessController> mProcessNames = new ProcessMap<>();
    /** All processes we currently have running mapped by pid and uid */
    final WindowProcessControllerMap mProcessMap = new WindowProcessControllerMap();
    /** This is the process holding what we currently consider to be the "home" activity. */
    WindowProcessController mHomeProcess;
    /** The currently running heavy-weight process, if any. */
    WindowProcessController mHeavyWeightProcess = null;
    boolean mHasHeavyWeightFeature;
    /**
     * This is the process holding the activity the user last visited that is in a different process
     * from the one they are currently in.
     */
    WindowProcessController mPreviousProcess;
    /** The time at which the previous process was last visible. */
    long mPreviousProcessVisibleTime;

    /** List of intents that were used to start the most recent tasks. */
    private RecentTasks mRecentTasks;
    /** State of external calls telling us if the device is awake or asleep. */
    private boolean mKeyguardShown = false;

    // Wrapper around VoiceInteractionServiceManager
    private AssistUtils mAssistUtils;

    // VoiceInteraction session ID that changes for each new request except when
    // being called for multi-window assist in a single session.
    private int mViSessionId = 1000;

    // How long to wait in getAssistContextExtras for the activity and foreground services
    // to respond with the result.
    private static final int PENDING_ASSIST_EXTRAS_TIMEOUT = 500;

    // How long top wait when going through the modern assist (which doesn't need to block
    // on getting this result before starting to launch its UI).
    private static final int PENDING_ASSIST_EXTRAS_LONG_TIMEOUT = 2000;

    // How long to wait in getAutofillAssistStructure() for the activity to respond with the result.
    private static final int PENDING_AUTOFILL_ASSIST_STRUCTURE_TIMEOUT = 2000;

    // Permission tokens are used to temporarily granted a trusted app the ability to call
    // #startActivityAsCaller.  A client is expected to dump its token after this time has elapsed,
    // showing any appropriate error messages to the user.
    private static final long START_AS_CALLER_TOKEN_TIMEOUT =
            10 * MINUTE_IN_MILLIS;

    // How long before the service actually expires a token.  This is slightly longer than
    // START_AS_CALLER_TOKEN_TIMEOUT, to provide a buffer so clients will rarely encounter the
    // expiration exception.
    private static final long START_AS_CALLER_TOKEN_TIMEOUT_IMPL =
            START_AS_CALLER_TOKEN_TIMEOUT + 2 * 1000;

    // How long the service will remember expired tokens, for the purpose of providing error
    // messaging when a client uses an expired token.
    private static final long START_AS_CALLER_TOKEN_EXPIRED_TIMEOUT =
            START_AS_CALLER_TOKEN_TIMEOUT_IMPL + 20 * MINUTE_IN_MILLIS;

    // Activity tokens of system activities that are delegating their call to
    // #startActivityByCaller, keyed by the permissionToken granted to the delegate.
    final HashMap<IBinder, IBinder> mStartActivitySources = new HashMap<>();

    // Permission tokens that have expired, but we remember for error reporting.
    final ArrayList<IBinder> mExpiredStartAsCallerTokens = new ArrayList<>();

    private final ArrayList<PendingAssistExtras> mPendingAssistExtras = new ArrayList<>();

    // Keeps track of the active voice interaction service component, notified from
    // VoiceInteractionManagerService
    ComponentName mActiveVoiceInteractionServiceComponent;

    // A map userId and all its companion app uids
    private final Map<Integer, Set<Integer>> mCompanionAppUidsMap = new ArrayMap<>();

    VrController mVrController;
    KeyguardController mKeyguardController;
    private final ClientLifecycleManager mLifecycleManager;
    private TaskChangeNotificationController mTaskChangeNotificationController;
    /** The controller for all operations related to locktask. */
    private LockTaskController mLockTaskController;
    private ActivityStartController mActivityStartController;

    boolean mSuppressResizeConfigChanges;

    final UpdateConfigurationResult mTmpUpdateConfigurationResult =
            new UpdateConfigurationResult();

    static final class UpdateConfigurationResult {
        // Configuration changes that were updated.
        int changes;
        // If the activity was relaunched to match the new configuration.
        boolean activityRelaunched;

        void reset() {
            changes = 0;
            activityRelaunched = false;
        }
    }

    /** Current sequencing integer of the configuration, for skipping old configurations. */
    private int mConfigurationSeq;
    // To cache the list of supported system locales
    private String[] mSupportedSystemLocales = null;

    /**
     * Temp object used when global and/or display override configuration is updated. It is also
     * sent to outer world instead of {@link #getGlobalConfiguration} because we don't trust
     * anyone...
     */
    private Configuration mTempConfig = new Configuration();

    /** Temporary to avoid allocations. */
    final StringBuilder mStringBuilder = new StringBuilder(256);

    // Amount of time after a call to stopAppSwitches() during which we will
    // prevent further untrusted switches from happening.
    private static final long APP_SWITCH_DELAY_TIME = 5 * 1000;

    /**
     * The time at which we will allow normal application switches again,
     * after a call to {@link #stopAppSwitches()}.
     */
    private long mAppSwitchesAllowedTime;
    /**
     * This is set to true after the first switch after mAppSwitchesAllowedTime
     * is set; any switches after that will clear the time.
     */
    private boolean mDidAppSwitch;

    /**
     * Last stop app switches time, apps finished before this time cannot start background activity
     * even if they are in grace period.
     */
    private long mLastStopAppSwitchesTime;

    IActivityController mController = null;
    boolean mControllerIsAMonkey = false;

    final int mFactoryTest;

    /** Used to control how we initialize the service. */
    ComponentName mTopComponent;
    String mTopAction = Intent.ACTION_MAIN;
    String mTopData;

    /** Profiling app information. */
    String mProfileApp = null;
    WindowProcessController mProfileProc = null;
    ProfilerInfo mProfilerInfo = null;

    /**
     * Dump of the activity state at the time of the last ANR. Cleared after
     * {@link WindowManagerService#LAST_ANR_LIFETIME_DURATION_MSECS}
     */
    String mLastANRState;

    /**
     * Used to retain an update lock when the foreground activity is in
     * immersive mode.
     */
    private final UpdateLock mUpdateLock = new UpdateLock("immersive");

    /**
     * Packages that are being allowed to perform unrestricted app switches.  Mapping is
     * User -> Type -> uid.
     */
    final SparseArray<ArrayMap<String, Integer>> mAllowAppSwitchUids = new SparseArray<>();

    /** The dimensions of the thumbnails in the Recents UI. */
    private int mThumbnailWidth;
    private int mThumbnailHeight;

    /**
     * Flag that indicates if multi-window is enabled.
     *
     * For any particular form of multi-window to be enabled, generic multi-window must be enabled
     * in {@link com.android.internal.R.bool#config_supportsMultiWindow} config or
     * {@link Settings.Global#DEVELOPMENT_FORCE_RESIZABLE_ACTIVITIES} development option set.
     * At least one of the forms of multi-window must be enabled in order for this flag to be
     * initialized to 'true'.
     *
     * @see #mSupportsSplitScreenMultiWindow
     * @see #mSupportsFreeformWindowManagement
     * @see #mSupportsPictureInPicture
     * @see #mSupportsMultiDisplay
     */
    boolean mSupportsMultiWindow;
    boolean mSupportsSplitScreenMultiWindow;
    boolean mSupportsFreeformWindowManagement;
    boolean mSupportsPictureInPicture;
    boolean mSupportsMultiDisplay;
    boolean mForceResizableActivities;
    boolean mSizeCompatFreeform;

    final List<ActivityTaskManagerInternal.ScreenObserver> mScreenObservers = new ArrayList<>();

    // VR Vr2d Display Id.
    int mVr2dDisplayId = INVALID_DISPLAY;

    /**
     * Set while we are wanting to sleep, to prevent any
     * activities from being started/resumed.
     *
     * TODO(b/33594039): Clarify the actual state transitions represented by mSleeping.
     *
     * Currently mSleeping is set to true when transitioning into the sleep state, and remains true
     * while in the sleep state until there is a pending transition out of sleep, in which case
     * mSleeping is set to false, and remains false while awake.
     *
     * Whether mSleeping can quickly toggled between true/false without the device actually
     * display changing states is undefined.
     */
    private boolean mSleeping = false;

    /**
     * The process state used for processes that are running the top activities.
     * This changes between TOP and TOP_SLEEPING to following mSleeping.
     */
    int mTopProcessState = ActivityManager.PROCESS_STATE_TOP;

    @Retention(RetentionPolicy.SOURCE)
    @IntDef({
            LAYOUT_REASON_CONFIG_CHANGED,
            LAYOUT_REASON_VISIBILITY_CHANGED,
    })
    @interface LayoutReason {}
    static final int LAYOUT_REASON_CONFIG_CHANGED = 0x1;
    static final int LAYOUT_REASON_VISIBILITY_CHANGED = 0x2;

    /** The reasons to perform surface placement. */
    @LayoutReason
    private int mLayoutReasons;

    // Whether we should show our dialogs (ANR, crash, etc) or just perform their default action
    // automatically. Important for devices without direct input devices.
    private boolean mShowDialogs = true;

    /** Set if we are shutting down the system, similar to sleeping. */
    boolean mShuttingDown = false;

    /**
     * We want to hold a wake lock while running a voice interaction session, since
     * this may happen with the screen off and we need to keep the CPU running to
     * be able to continue to interact with the user.
     */
    PowerManager.WakeLock mVoiceWakeLock;

    /**
     * Set while we are running a voice interaction. This overrides sleeping while it is active.
     */
    IVoiceInteractionSession mRunningVoice;

    /**
     * The last resumed activity. This is identical to the current resumed activity most
     * of the time but could be different when we're pausing one activity before we resume
     * another activity.
     */
    ActivityRecord mLastResumedActivity;

    /**
     * The activity that is currently being traced as the active resumed activity.
     *
     * @see #updateResumedAppTrace
     */
    private @Nullable ActivityRecord mTracedResumedActivity;

    /** If non-null, we are tracking the time the user spends in the currently focused app. */
    AppTimeTracker mCurAppTimeTracker;

    AppWarnings mAppWarnings;

    /**
     * Packages that the user has asked to have run in screen size
     * compatibility mode instead of filling the screen.
     */
    CompatModePackages mCompatModePackages;

    private FontScaleSettingObserver mFontScaleSettingObserver;

    /**
     * Stores the registration and state of TaskOrganizers in use.
     */
    TaskOrganizerController mTaskOrganizerController = new TaskOrganizerController(this);

    private int mDeviceOwnerUid = Process.INVALID_UID;

    private final class FontScaleSettingObserver extends ContentObserver {
        private final Uri mFontScaleUri = Settings.System.getUriFor(FONT_SCALE);
        private final Uri mHideErrorDialogsUri = Settings.Global.getUriFor(HIDE_ERROR_DIALOGS);

        public FontScaleSettingObserver() {
            super(mH);
            final ContentResolver resolver = mContext.getContentResolver();
            resolver.registerContentObserver(mFontScaleUri, false, this, UserHandle.USER_ALL);
            resolver.registerContentObserver(mHideErrorDialogsUri, false, this,
                    UserHandle.USER_ALL);
        }

        @Override
        public void onChange(boolean selfChange, Uri uri, @UserIdInt int userId) {
            if (mFontScaleUri.equals(uri)) {
                updateFontScaleIfNeeded(userId);
            } else if (mHideErrorDialogsUri.equals(uri)) {
                synchronized (mGlobalLock) {
                    updateShouldShowDialogsLocked(getGlobalConfiguration());
                }
            }
        }
    }

    /** Indicates that the method may be invoked frequently or is sensitive to performance. */
    @Target(ElementType.METHOD)
    @Retention(RetentionPolicy.SOURCE)
    @interface HotPath {
        int NONE = 0;
        int OOM_ADJUSTMENT = 1;
        int LRU_UPDATE = 2;
        int PROCESS_CHANGE = 3;
        int caller() default NONE;
    }

    private final Runnable mUpdateOomAdjRunnable = new Runnable() {
        @Override
        public void run() {
            mAmInternal.updateOomAdj();
        }
    };

    @VisibleForTesting(visibility = VisibleForTesting.Visibility.PACKAGE)
    public ActivityTaskManagerService(Context context) {
        mContext = context;
        mFactoryTest = FactoryTest.getMode();
        mSystemThread = ActivityThread.currentActivityThread();
        mUiContext = mSystemThread.getSystemUiContext();
        mLifecycleManager = new ClientLifecycleManager();
        mInternal = new LocalService();
        GL_ES_VERSION = SystemProperties.getInt("ro.opengles.version", GL_ES_VERSION_UNDEFINED);
    }

    public void onSystemReady() {
        synchronized (mGlobalLock) {
            mHasHeavyWeightFeature = mContext.getPackageManager().hasSystemFeature(
                    PackageManager.FEATURE_CANT_SAVE_STATE);
            mAssistUtils = new AssistUtils(mContext);
            mVrController.onSystemReady();
            mRecentTasks.onSystemReadyLocked();
            mStackSupervisor.onSystemReady();
        }
    }

    public void onInitPowerManagement() {
        synchronized (mGlobalLock) {
            mStackSupervisor.initPowerManagement();
            final PowerManager pm = (PowerManager) mContext.getSystemService(Context.POWER_SERVICE);
            mPowerManagerInternal = LocalServices.getService(PowerManagerInternal.class);
            mVoiceWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "*voice*");
            mVoiceWakeLock.setReferenceCounted(false);
        }
    }

    public void installSystemProviders() {
        mFontScaleSettingObserver = new FontScaleSettingObserver();
    }

    public void retrieveSettings(ContentResolver resolver) {
        final boolean freeformWindowManagement =
                mContext.getPackageManager().hasSystemFeature(FEATURE_FREEFORM_WINDOW_MANAGEMENT)
                        || Settings.Global.getInt(
                        resolver, DEVELOPMENT_ENABLE_FREEFORM_WINDOWS_SUPPORT, 0) != 0;

        final boolean supportsMultiWindow = ActivityTaskManager.supportsMultiWindow(mContext);
        final boolean supportsPictureInPicture = supportsMultiWindow &&
                mContext.getPackageManager().hasSystemFeature(FEATURE_PICTURE_IN_PICTURE);
        final boolean supportsSplitScreenMultiWindow =
                ActivityTaskManager.supportsSplitScreenMultiWindow(mContext);
        final boolean supportsMultiDisplay = mContext.getPackageManager()
                .hasSystemFeature(FEATURE_ACTIVITIES_ON_SECONDARY_DISPLAYS);
        final boolean forceRtl = Settings.Global.getInt(resolver, DEVELOPMENT_FORCE_RTL, 0) != 0;
        final boolean forceResizable = Settings.Global.getInt(
                resolver, DEVELOPMENT_FORCE_RESIZABLE_ACTIVITIES, 0) != 0;
        final boolean sizeCompatFreeform = Settings.Global.getInt(
                resolver, DEVELOPMENT_ENABLE_SIZECOMPAT_FREEFORM, 0) != 0;

        // Transfer any global setting for forcing RTL layout, into a System Property
        DisplayProperties.debug_force_rtl(forceRtl);

        final Configuration configuration = new Configuration();
        Settings.System.getConfiguration(resolver, configuration);
        if (forceRtl) {
            // This will take care of setting the correct layout direction flags
            configuration.setLayoutDirection(configuration.locale);
        }

        synchronized (mGlobalLock) {
            mForceResizableActivities = forceResizable;
            mSizeCompatFreeform = sizeCompatFreeform;
            final boolean multiWindowFormEnabled = freeformWindowManagement
                    || supportsSplitScreenMultiWindow
                    || supportsPictureInPicture
                    || supportsMultiDisplay;
            if ((supportsMultiWindow || forceResizable) && multiWindowFormEnabled) {
                mSupportsMultiWindow = true;
                mSupportsFreeformWindowManagement = freeformWindowManagement;
                mSupportsSplitScreenMultiWindow = supportsSplitScreenMultiWindow;
                mSupportsPictureInPicture = supportsPictureInPicture;
                mSupportsMultiDisplay = supportsMultiDisplay;
            } else {
                mSupportsMultiWindow = false;
                mSupportsFreeformWindowManagement = false;
                mSupportsSplitScreenMultiWindow = false;
                mSupportsPictureInPicture = false;
                mSupportsMultiDisplay = false;
            }
            mWindowManager.mRoot.onSettingsRetrieved();
            // This happens before any activities are started, so we can change global configuration
            // in-place.
            updateConfigurationLocked(configuration, null, true);
            final Configuration globalConfig = getGlobalConfiguration();
            if (DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION, "Initial config: " + globalConfig);

            // Load resources only after the current configuration has been set.
            final Resources res = mContext.getResources();
            mThumbnailWidth = res.getDimensionPixelSize(
                    com.android.internal.R.dimen.thumbnail_width);
            mThumbnailHeight = res.getDimensionPixelSize(
                    com.android.internal.R.dimen.thumbnail_height);
        }
    }

    public WindowManagerGlobalLock getGlobalLock() {
        return mGlobalLock;
    }

    /** For test purpose only. */
    @VisibleForTesting
    public ActivityTaskManagerInternal getAtmInternal() {
        return mInternal;
    }

    public void initialize(IntentFirewall intentFirewall, PendingIntentController intentController,
            Looper looper) {
        mH = new H(looper);
        mUiHandler = new UiHandler();
        mIntentFirewall = intentFirewall;
        final File systemDir = SystemServiceManager.ensureSystemDir();
        mAppWarnings = createAppWarnings(mUiContext, mH, mUiHandler, systemDir);
        mCompatModePackages = new CompatModePackages(this, systemDir, mH);
        mPendingIntentController = intentController;
        mStackSupervisor = createStackSupervisor();

        mTaskChangeNotificationController =
                new TaskChangeNotificationController(mGlobalLock, mStackSupervisor, mH);
        mLockTaskController = new LockTaskController(mContext, mStackSupervisor, mH);
        mActivityStartController = new ActivityStartController(this);
        setRecentTasks(new RecentTasks(this, mStackSupervisor));
        mVrController = new VrController(mGlobalLock);
        mKeyguardController = mStackSupervisor.getKeyguardController();
    }

    public void onActivityManagerInternalAdded() {
        synchronized (mGlobalLock) {
            mAmInternal = LocalServices.getService(ActivityManagerInternal.class);
            mUgmInternal = LocalServices.getService(UriGrantsManagerInternal.class);
        }
    }

    int increaseConfigurationSeqLocked() {
        mConfigurationSeq = Math.max(++mConfigurationSeq, 1);
        return mConfigurationSeq;
    }

    protected ActivityStackSupervisor createStackSupervisor() {
        final ActivityStackSupervisor supervisor = new ActivityStackSupervisor(this, mH.getLooper());
        supervisor.initialize();
        return supervisor;
    }

    protected AppWarnings createAppWarnings(
            Context uiContext, Handler handler, Handler uiHandler, File systemDir) {
        return new AppWarnings(this, uiContext, handler, uiHandler, systemDir);
    }

    public void setWindowManager(WindowManagerService wm) {
        synchronized (mGlobalLock) {
            mWindowManager = wm;
            mRootWindowContainer = wm.mRoot;
            mTempConfig.setToDefaults();
            mTempConfig.setLocales(LocaleList.getDefault());
            mConfigurationSeq = mTempConfig.seq = 1;
            mRootWindowContainer.onConfigurationChanged(mTempConfig);
            mLockTaskController.setWindowManager(wm);
            mStackSupervisor.setWindowManager(wm);
            mRootWindowContainer.setWindowManager(wm);
        }
    }

    public void setUsageStatsManager(UsageStatsManagerInternal usageStatsManager) {
        synchronized (mGlobalLock) {
            mUsageStatsInternal = usageStatsManager;
        }
    }

    UserManagerService getUserManager() {
        if (mUserManager == null) {
            IBinder b = ServiceManager.getService(Context.USER_SERVICE);
            mUserManager = (UserManagerService) IUserManager.Stub.asInterface(b);
        }
        return mUserManager;
    }

    AppOpsManager getAppOpsManager() {
        if (mAppOpsManager == null) {
            mAppOpsManager = mContext.getSystemService(AppOpsManager.class);
        }
        return mAppOpsManager;
    }

    boolean hasUserRestriction(String restriction, int userId) {
        return getUserManager().hasUserRestriction(restriction, userId);
    }

    boolean hasSystemAlertWindowPermission(int callingUid, int callingPid, String callingPackage) {
        final int mode = getAppOpsManager().noteOpNoThrow(AppOpsManager.OP_SYSTEM_ALERT_WINDOW,
                callingUid, callingPackage, /* featureId */ null, "");
        if (mode == AppOpsManager.MODE_DEFAULT) {
            return checkPermission(Manifest.permission.SYSTEM_ALERT_WINDOW, callingPid, callingUid)
                    == PERMISSION_GRANTED;
        }
        return mode == AppOpsManager.MODE_ALLOWED;
    }

    @VisibleForTesting
    protected void setRecentTasks(RecentTasks recentTasks) {
        mRecentTasks = recentTasks;
        mStackSupervisor.setRecentTasks(recentTasks);
    }

    RecentTasks getRecentTasks() {
        return mRecentTasks;
    }

    ClientLifecycleManager getLifecycleManager() {
        return mLifecycleManager;
    }

    ActivityStartController getActivityStartController() {
        return mActivityStartController;
    }

    TaskChangeNotificationController getTaskChangeNotificationController() {
        return mTaskChangeNotificationController;
    }

    LockTaskController getLockTaskController() {
        return mLockTaskController;
    }

    /**
     * Return the global configuration used by the process corresponding to the input pid. This is
     * usually the global configuration with some overrides specific to that process.
     */
    Configuration getGlobalConfigurationForCallingPid() {
        final int pid = Binder.getCallingPid();
        return getGlobalConfigurationForPid(pid);
    }

    /**
     * Return the global configuration used by the process corresponding to the given pid.
     */
    Configuration getGlobalConfigurationForPid(int pid) {
        if (pid == MY_PID || pid < 0) {
            return getGlobalConfiguration();
        }
        synchronized (mGlobalLock) {
            final WindowProcessController app = mProcessMap.getProcess(pid);
            return app != null ? app.getConfiguration() : getGlobalConfiguration();
        }
    }

    /**
     * Return the device configuration info used by the process corresponding to the input pid.
     * The value is consistent with the global configuration for the process.
     */
    @Override
    public ConfigurationInfo getDeviceConfigurationInfo() {
        ConfigurationInfo config = new ConfigurationInfo();
        synchronized (mGlobalLock) {
            final Configuration globalConfig = getGlobalConfigurationForCallingPid();
            config.reqTouchScreen = globalConfig.touchscreen;
            config.reqKeyboardType = globalConfig.keyboard;
            config.reqNavigation = globalConfig.navigation;
            if (globalConfig.navigation == Configuration.NAVIGATION_DPAD
                    || globalConfig.navigation == Configuration.NAVIGATION_TRACKBALL) {
                config.reqInputFeatures |= ConfigurationInfo.INPUT_FEATURE_FIVE_WAY_NAV;
            }
            if (globalConfig.keyboard != Configuration.KEYBOARD_UNDEFINED
                    && globalConfig.keyboard != Configuration.KEYBOARD_NOKEYS) {
                config.reqInputFeatures |= ConfigurationInfo.INPUT_FEATURE_HARD_KEYBOARD;
            }
            config.reqGlEsVersion = GL_ES_VERSION;
        }
        return config;
    }

    private void start() {
        LocalServices.addService(ActivityTaskManagerInternal.class, mInternal);
    }

    public static final class Lifecycle extends SystemService {
        private final ActivityTaskManagerService mService;

        public Lifecycle(Context context) {
            super(context);
            mService = new ActivityTaskManagerService(context);
        }

        @Override
        public void onStart() {
            publishBinderService(Context.ACTIVITY_TASK_SERVICE, mService);
            mService.start();
        }

        @Override
        public void onUnlockUser(int userId) {
            synchronized (mService.getGlobalLock()) {
                mService.mStackSupervisor.onUserUnlocked(userId);
            }
        }

        @Override
        public void onCleanupUser(int userId) {
            synchronized (mService.getGlobalLock()) {
                mService.mStackSupervisor.mLaunchParamsPersister.onCleanupUser(userId);
            }
        }

        public ActivityTaskManagerService getService() {
            return mService;
        }
    }

    @Override
    public final int startActivity(IApplicationThread caller, String callingPackage,
            String callingFeatureId, Intent intent, String resolvedType, IBinder resultTo,
            String resultWho, int requestCode, int startFlags, ProfilerInfo profilerInfo,
            Bundle bOptions) {
        return startActivityAsUser(caller, callingPackage, callingFeatureId, intent, resolvedType,
                resultTo, resultWho, requestCode, startFlags, profilerInfo, bOptions,
                UserHandle.getCallingUserId());
    }

    @Override
    public final int startActivities(IApplicationThread caller, String callingPackage,
            String callingFeatureId, Intent[] intents, String[] resolvedTypes, IBinder resultTo,
            Bundle bOptions, int userId) {
        assertPackageMatchesCallingUid(callingPackage);
        final String reason = "startActivities";
        enforceNotIsolatedCaller(reason);
        userId = handleIncomingUser(Binder.getCallingPid(), Binder.getCallingUid(), userId, reason);
        // TODO: Switch to user app stacks here.
        return getActivityStartController().startActivities(caller, -1, 0, -1, callingPackage,
                callingFeatureId, intents, resolvedTypes, resultTo,
                SafeActivityOptions.fromBundle(bOptions), userId, reason,
                null /* originatingPendingIntent */, false /* allowBackgroundActivityStart */);
    }

    @Override
    public int startActivityAsUser(IApplicationThread caller, String callingPackage,
            String callingFeatureId, Intent intent, String resolvedType, IBinder resultTo,
            String resultWho, int requestCode, int startFlags, ProfilerInfo profilerInfo,
            Bundle bOptions, int userId) {
        return startActivityAsUser(caller, callingPackage, callingFeatureId, intent, resolvedType,
                resultTo, resultWho, requestCode, startFlags, profilerInfo, bOptions, userId,
                true /*validateIncomingUser*/);
    }

    private int startActivityAsUser(IApplicationThread caller, String callingPackage,
            @Nullable String callingFeatureId, Intent intent, String resolvedType,
            IBinder resultTo, String resultWho, int requestCode, int startFlags,
            ProfilerInfo profilerInfo, Bundle bOptions, int userId, boolean validateIncomingUser) {
        assertPackageMatchesCallingUid(callingPackage);
        enforceNotIsolatedCaller("startActivityAsUser");

        userId = getActivityStartController().checkTargetUser(userId, validateIncomingUser,
                Binder.getCallingPid(), Binder.getCallingUid(), "startActivityAsUser");

        // TODO: Switch to user app stacks here.
        return getActivityStartController().obtainStarter(intent, "startActivityAsUser")
                .setCaller(caller)
                .setCallingPackage(callingPackage)
                .setCallingFeatureId(callingFeatureId)
                .setResolvedType(resolvedType)
                .setResultTo(resultTo)
                .setResultWho(resultWho)
                .setRequestCode(requestCode)
                .setStartFlags(startFlags)
                .setProfilerInfo(profilerInfo)
                .setActivityOptions(bOptions)
                .setUserId(userId)
                .execute();

    }

    @Override
    public int startActivityIntentSender(IApplicationThread caller, IIntentSender target,
            IBinder whitelistToken, Intent fillInIntent, String resolvedType, IBinder resultTo,
            String resultWho, int requestCode, int flagsMask, int flagsValues, Bundle bOptions) {
        enforceNotIsolatedCaller("startActivityIntentSender");
        // Refuse possible leaked file descriptors
        if (fillInIntent != null && fillInIntent.hasFileDescriptors()) {
            throw new IllegalArgumentException("File descriptors passed in Intent");
        }

        if (!(target instanceof PendingIntentRecord)) {
            throw new IllegalArgumentException("Bad PendingIntent object");
        }

        PendingIntentRecord pir = (PendingIntentRecord)target;

        synchronized (mGlobalLock) {
            // If this is coming from the currently resumed activity, it is
            // effectively saying that app switches are allowed at this point.
            final ActivityStack stack = getTopDisplayFocusedStack();
            if (stack.mResumedActivity != null &&
                    stack.mResumedActivity.info.applicationInfo.uid == Binder.getCallingUid()) {
                mAppSwitchesAllowedTime = 0;
            }
        }
        return pir.sendInner(0, fillInIntent, resolvedType, whitelistToken, null, null,
                resultTo, resultWho, requestCode, flagsMask, flagsValues, bOptions);
    }

    @Override
    public boolean startNextMatchingActivity(IBinder callingActivity, Intent intent,
            Bundle bOptions) {
        // Refuse possible leaked file descriptors
        if (intent != null && intent.hasFileDescriptors()) {
            throw new IllegalArgumentException("File descriptors passed in Intent");
        }
        SafeActivityOptions options = SafeActivityOptions.fromBundle(bOptions);

        synchronized (mGlobalLock) {
            final ActivityRecord r = ActivityRecord.isInStackLocked(callingActivity);
            if (r == null) {
                SafeActivityOptions.abort(options);
                return false;
            }
            if (!r.attachedToProcess()) {
                // The caller is not running...  d'oh!
                SafeActivityOptions.abort(options);
                return false;
            }
            intent = new Intent(intent);
            // The caller is not allowed to change the data.
            intent.setDataAndType(r.intent.getData(), r.intent.getType());
            // And we are resetting to find the next component...
            intent.setComponent(null);

            final boolean debug = ((intent.getFlags() & Intent.FLAG_DEBUG_LOG_RESOLUTION) != 0);

            ActivityInfo aInfo = null;
            try {
                List<ResolveInfo> resolves =
                        AppGlobals.getPackageManager().queryIntentActivities(
                                intent, r.resolvedType,
                                PackageManager.MATCH_DEFAULT_ONLY | STOCK_PM_FLAGS,
                                UserHandle.getCallingUserId()).getList();

                // Look for the original activity in the list...
                final int N = resolves != null ? resolves.size() : 0;
                for (int i=0; i<N; i++) {
                    ResolveInfo rInfo = resolves.get(i);
                    if (rInfo.activityInfo.packageName.equals(r.packageName)
                            && rInfo.activityInfo.name.equals(r.info.name)) {
                        // We found the current one...  the next matching is
                        // after it.
                        i++;
                        if (i<N) {
                            aInfo = resolves.get(i).activityInfo;
                        }
                        if (debug) {
                            Slog.v(TAG, "Next matching activity: found current " + r.packageName
                                    + "/" + r.info.name);
                            Slog.v(TAG, "Next matching activity: next is " + ((aInfo == null)
                                    ? "null" : aInfo.packageName + "/" + aInfo.name));
                        }
                        break;
                    }
                }
            } catch (RemoteException e) {
            }

            if (aInfo == null) {
                // Nobody who is next!
                SafeActivityOptions.abort(options);
                if (debug) Slog.d(TAG, "Next matching activity: nothing found");
                return false;
            }

            intent.setComponent(new ComponentName(
                    aInfo.applicationInfo.packageName, aInfo.name));
            intent.setFlags(intent.getFlags()&~(
                    Intent.FLAG_ACTIVITY_FORWARD_RESULT|
                            Intent.FLAG_ACTIVITY_CLEAR_TOP|
                            Intent.FLAG_ACTIVITY_MULTIPLE_TASK|
                            FLAG_ACTIVITY_NEW_TASK));

            // Okay now we need to start the new activity, replacing the currently running activity.
            // This is a little tricky because we want to start the new one as if the current one is
            // finished, but not finish the current one first so that there is no flicker.
            // And thus...
            final boolean wasFinishing = r.finishing;
            r.finishing = true;

            // Propagate reply information over to the new activity.
            final ActivityRecord resultTo = r.resultTo;
            final String resultWho = r.resultWho;
            final int requestCode = r.requestCode;
            r.resultTo = null;
            if (resultTo != null) {
                resultTo.removeResultsLocked(r, resultWho, requestCode);
            }

            final long origId = Binder.clearCallingIdentity();
            // TODO(b/64750076): Check if calling pid should really be -1.
            final int res = getActivityStartController()
                    .obtainStarter(intent, "startNextMatchingActivity")
                    .setCaller(r.app.getThread())
                    .setResolvedType(r.resolvedType)
                    .setActivityInfo(aInfo)
                    .setResultTo(resultTo != null ? resultTo.appToken : null)
                    .setResultWho(resultWho)
                    .setRequestCode(requestCode)
                    .setCallingPid(-1)
                    .setCallingUid(r.launchedFromUid)
                    .setCallingPackage(r.launchedFromPackage)
                    .setCallingFeatureId(r.launchedFromFeatureId)
                    .setRealCallingPid(-1)
                    .setRealCallingUid(r.launchedFromUid)
                    .setActivityOptions(options)
                    .execute();
            Binder.restoreCallingIdentity(origId);

            r.finishing = wasFinishing;
            if (res != ActivityManager.START_SUCCESS) {
                return false;
            }
            return true;
        }
    }

    @Override
    public boolean startDreamActivity(Intent intent) {
        final WindowProcessController process = mProcessMap.getProcess(Binder.getCallingPid());
        final long origId = Binder.clearCallingIdentity();

        // The dream activity is only called for non-doze dreams.
        final ComponentName currentDream = LocalServices.getService(DreamManagerInternal.class)
                .getActiveDreamComponent(/* doze= */ false);

        if (currentDream == null || currentDream.getPackageName() == null
                || !currentDream.getPackageName().equals(process.mInfo.packageName)) {
            Slog.e(TAG, "Calling package is not the current dream package. "
                    + "Aborting startDreamActivity...");
            return false;
        }

        final ActivityInfo a = new ActivityInfo();
        a.theme = com.android.internal.R.style.Theme_Dream;
        a.exported = true;
        a.name = DreamActivity.class.getName();


        a.packageName = process.mInfo.packageName;
        a.applicationInfo = process.mInfo;
        a.processName = process.mInfo.processName;
        a.uiOptions = process.mInfo.uiOptions;
        a.taskAffinity = "android:" + a.packageName + "/dream";
        a.enabled = true;
        a.launchMode = ActivityInfo.LAUNCH_SINGLE_INSTANCE;

        a.persistableMode = ActivityInfo.PERSIST_NEVER;
        a.screenOrientation = ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED;
        a.colorMode = ActivityInfo.COLOR_MODE_DEFAULT;
        a.flags |= ActivityInfo.FLAG_EXCLUDE_FROM_RECENTS;

        try {
            getActivityStartController().obtainStarter(intent, "dream")
                    .setActivityInfo(a)
                    .setIsDream(true)
                    .execute();
            return true;
        } finally {
            Binder.restoreCallingIdentity(origId);
        }
    }

    @Override
    public final WaitResult startActivityAndWait(IApplicationThread caller, String callingPackage,
            String callingFeatureId, Intent intent, String resolvedType, IBinder resultTo,
            String resultWho, int requestCode, int startFlags, ProfilerInfo profilerInfo,
            Bundle bOptions, int userId) {
        assertPackageMatchesCallingUid(callingPackage);
        final WaitResult res = new WaitResult();
        enforceNotIsolatedCaller("startActivityAndWait");
        userId = handleIncomingUser(Binder.getCallingPid(), Binder.getCallingUid(),
                userId, "startActivityAndWait");
        // TODO: Switch to user app stacks here.
        getActivityStartController().obtainStarter(intent, "startActivityAndWait")
                .setCaller(caller)
                .setCallingPackage(callingPackage)
                .setCallingFeatureId(callingFeatureId)
                .setResolvedType(resolvedType)
                .setResultTo(resultTo)
                .setResultWho(resultWho)
                .setRequestCode(requestCode)
                .setStartFlags(startFlags)
                .setActivityOptions(bOptions)
                .setUserId(userId)
                .setProfilerInfo(profilerInfo)
                .setWaitResult(res)
                .execute();
        return res;
    }

    @Override
    public final int startActivityWithConfig(IApplicationThread caller, String callingPackage,
            String callingFeatureId, Intent intent, String resolvedType, IBinder resultTo,
            String resultWho, int requestCode, int startFlags, Configuration config,
            Bundle bOptions, int userId) {
        assertPackageMatchesCallingUid(callingPackage);
        enforceNotIsolatedCaller("startActivityWithConfig");
        userId = handleIncomingUser(Binder.getCallingPid(), Binder.getCallingUid(), userId,
                "startActivityWithConfig");
        // TODO: Switch to user app stacks here.
        return getActivityStartController().obtainStarter(intent, "startActivityWithConfig")
                .setCaller(caller)
                .setCallingPackage(callingPackage)
                .setCallingFeatureId(callingFeatureId)
                .setResolvedType(resolvedType)
                .setResultTo(resultTo)
                .setResultWho(resultWho)
                .setRequestCode(requestCode)
                .setStartFlags(startFlags)
                .setGlobalConfiguration(config)
                .setActivityOptions(bOptions)
                .setUserId(userId)
                .execute();
    }

    @Override
    public IBinder requestStartActivityPermissionToken(IBinder delegatorToken) {
        int callingUid = Binder.getCallingUid();
        if (UserHandle.getAppId(callingUid) != SYSTEM_UID) {
            throw new SecurityException("Only the system process can request a permission token, "
                    + "received request from uid: " + callingUid);
        }
        IBinder permissionToken = new Binder();
        synchronized (mGlobalLock) {
            mStartActivitySources.put(permissionToken, delegatorToken);
        }

        Message expireMsg = PooledLambda.obtainMessage(
                ActivityTaskManagerService::expireStartAsCallerTokenMsg, this, permissionToken);
        mUiHandler.sendMessageDelayed(expireMsg, START_AS_CALLER_TOKEN_TIMEOUT_IMPL);

        Message forgetMsg = PooledLambda.obtainMessage(
                ActivityTaskManagerService::forgetStartAsCallerTokenMsg, this, permissionToken);
        mUiHandler.sendMessageDelayed(forgetMsg, START_AS_CALLER_TOKEN_EXPIRED_TIMEOUT);

        return permissionToken;
    }

    @Override
    public final int startActivityAsCaller(IApplicationThread caller, String callingPackage,
            Intent intent, String resolvedType, IBinder resultTo, String resultWho, int requestCode,
            int startFlags, ProfilerInfo profilerInfo, Bundle bOptions, IBinder permissionToken,
            boolean ignoreTargetSecurity, int userId) {
        // This is very dangerous -- it allows you to perform a start activity (including
        // permission grants) as any app that may launch one of your own activities.  So we only
        // allow this in two cases:
        // 1)  The caller is an activity that is part of the core framework, and then only when it
        //     is running as the system.
        // 2)  The caller provides a valid permissionToken.  Permission tokens are one-time use and
        //     can only be requested by a system activity, which may then delegate this call to
        //     another app.
        final ActivityRecord sourceRecord;
        final int targetUid;
        final String targetPackage;
        final String targetFeatureId;
        final boolean isResolver;
        synchronized (mGlobalLock) {
            if (resultTo == null) {
                throw new SecurityException("Must be called from an activity");
            }
            final IBinder sourceToken;
            if (permissionToken != null) {
                // To even attempt to use a permissionToken, an app must also have this signature
                // permission.
                mAmInternal.enforceCallingPermission(
                        android.Manifest.permission.START_ACTIVITY_AS_CALLER,
                        "startActivityAsCaller");
                // If called with a permissionToken, we want the sourceRecord from the delegator
                // activity that requested this token.
                sourceToken = mStartActivitySources.remove(permissionToken);
                if (sourceToken == null) {
                    // Invalid permissionToken, check if it recently expired.
                    if (mExpiredStartAsCallerTokens.contains(permissionToken)) {
                        throw new SecurityException("Called with expired permission token: "
                                + permissionToken);
                    } else {
                        throw new SecurityException("Called with invalid permission token: "
                                + permissionToken);
                    }
                }
            } else {
                // This method was called directly by the source.
                sourceToken = resultTo;
            }

            sourceRecord = mRootWindowContainer.isInAnyStack(sourceToken);
            if (sourceRecord == null) {
                throw new SecurityException("Called with bad activity token: " + sourceToken);
            }
            if (sourceRecord.app == null) {
                throw new SecurityException("Called without a process attached to activity");
            }

            // Whether called directly or from a delegate, the source activity must be from the
            // android package.
            if (!sourceRecord.info.packageName.equals("android")) {
                throw new SecurityException("Must be called from an activity that is "
                        + "declared in the android package");
            }

            if (UserHandle.getAppId(sourceRecord.app.mUid) != SYSTEM_UID) {
                // This is still okay, as long as this activity is running under the
                // uid of the original calling activity.
                if (sourceRecord.app.mUid != sourceRecord.launchedFromUid) {
                    throw new SecurityException(
                            "Calling activity in uid " + sourceRecord.app.mUid
                                    + " must be system uid or original calling uid "
                                    + sourceRecord.launchedFromUid);
                }
            }
            if (ignoreTargetSecurity) {
                if (intent.getComponent() == null) {
                    throw new SecurityException(
                            "Component must be specified with ignoreTargetSecurity");
                }
                if (intent.getSelector() != null) {
                    throw new SecurityException(
                            "Selector not allowed with ignoreTargetSecurity");
                }
            }
            targetUid = sourceRecord.launchedFromUid;
            targetPackage = sourceRecord.launchedFromPackage;
            targetFeatureId = sourceRecord.launchedFromFeatureId;
            isResolver = sourceRecord.isResolverOrChildActivity();
        }

        if (userId == UserHandle.USER_NULL) {
            userId = UserHandle.getUserId(sourceRecord.app.mUid);
        }

        // TODO: Switch to user app stacks here.
        try {
            return getActivityStartController().obtainStarter(intent, "startActivityAsCaller")
                    .setCallingUid(targetUid)
                    .setCallingPackage(targetPackage)
                    .setCallingFeatureId(targetFeatureId)
                    .setResolvedType(resolvedType)
                    .setResultTo(resultTo)
                    .setResultWho(resultWho)
                    .setRequestCode(requestCode)
                    .setStartFlags(startFlags)
                    .setActivityOptions(bOptions)
                    .setUserId(userId)
                    .setIgnoreTargetSecurity(ignoreTargetSecurity)
                    .setFilterCallingUid(isResolver ? 0 /* system */ : targetUid)
                    // The target may well be in the background, which would normally prevent it
                    // from starting an activity. Here we definitely want the start to succeed.
                    .setAllowBackgroundActivityStart(true)
                    .execute();
        } catch (SecurityException e) {
            // XXX need to figure out how to propagate to original app.
            // A SecurityException here is generally actually a fault of the original
            // calling activity (such as a fairly granting permissions), so propagate it
            // back to them.
            /*
            StringBuilder msg = new StringBuilder();
            msg.append("While launching");
            msg.append(intent.toString());
            msg.append(": ");
            msg.append(e.getMessage());
            */
            throw e;
        }
    }

    int handleIncomingUser(int callingPid, int callingUid, int userId, String name) {
        return mAmInternal.handleIncomingUser(callingPid, callingUid, userId, false /* allowAll */,
                ALLOW_NON_FULL, name, null /* callerPackage */);
    }

    @Override
    public int startVoiceActivity(String callingPackage, String callingFeatureId, int callingPid,
            int callingUid, Intent intent, String resolvedType, IVoiceInteractionSession session,
            IVoiceInteractor interactor, int startFlags, ProfilerInfo profilerInfo,
            Bundle bOptions, int userId) {
        assertPackageMatchesCallingUid(callingPackage);
        mAmInternal.enforceCallingPermission(BIND_VOICE_INTERACTION, "startVoiceActivity()");
        if (session == null || interactor == null) {
            throw new NullPointerException("null session or interactor");
        }
        userId = handleIncomingUser(callingPid, callingUid, userId, "startVoiceActivity");
        // TODO: Switch to user app stacks here.
        return getActivityStartController().obtainStarter(intent, "startVoiceActivity")
                .setCallingUid(callingUid)
                .setCallingPackage(callingPackage)
                .setCallingFeatureId(callingFeatureId)
                .setResolvedType(resolvedType)
                .setVoiceSession(session)
                .setVoiceInteractor(interactor)
                .setStartFlags(startFlags)
                .setProfilerInfo(profilerInfo)
                .setActivityOptions(bOptions)
                .setUserId(userId)
                .setAllowBackgroundActivityStart(true)
                .execute();
    }

    @Override
    public int startAssistantActivity(String callingPackage, @NonNull String callingFeatureId,
            int callingPid, int callingUid, Intent intent, String resolvedType, Bundle bOptions,
            int userId) {
        assertPackageMatchesCallingUid(callingPackage);
        mAmInternal.enforceCallingPermission(BIND_VOICE_INTERACTION, "startAssistantActivity()");
        userId = handleIncomingUser(callingPid, callingUid, userId, "startAssistantActivity");

        return getActivityStartController().obtainStarter(intent, "startAssistantActivity")
                .setCallingUid(callingUid)
                .setCallingPackage(callingPackage)
                .setCallingFeatureId(callingFeatureId)
                .setResolvedType(resolvedType)
                .setActivityOptions(bOptions)
                .setUserId(userId)
                .setAllowBackgroundActivityStart(true)
                .execute();
    }

    /**
     * Start the recents activity to perform the recents animation.
     *
     * @param intent The intent to start the recents activity.
     * @param recentsAnimationRunner Pass {@code null} to only preload the activity.
     */
    @Override
    public void startRecentsActivity(Intent intent, @Deprecated IAssistDataReceiver unused,
            @Nullable IRecentsAnimationRunner recentsAnimationRunner) {
        enforceCallerIsRecentsOrHasPermission(MANAGE_ACTIVITY_STACKS, "startRecentsActivity()");
        final int callingPid = Binder.getCallingPid();
        final int callingUid = Binder.getCallingUid();
        final long origId = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                final ComponentName recentsComponent = mRecentTasks.getRecentsComponent();
                final String recentsFeatureId = mRecentTasks.getRecentsComponentFeatureId();
                final int recentsUid = mRecentTasks.getRecentsComponentUid();
                final WindowProcessController caller = getProcessController(callingPid, callingUid);

                // Start a new recents animation
                final RecentsAnimation anim = new RecentsAnimation(this, mStackSupervisor,
                        getActivityStartController(), mWindowManager, intent, recentsComponent,
                        recentsFeatureId, recentsUid, caller);
                if (recentsAnimationRunner == null) {
                    anim.preloadRecentsActivity();
                } else {
                    anim.startRecentsActivity(recentsAnimationRunner);
                }
            }
        } finally {
            Binder.restoreCallingIdentity(origId);
        }
    }

    @Override
    public final int startActivityFromRecents(int taskId, Bundle bOptions) {
        enforceCallerIsRecentsOrHasPermission(START_TASKS_FROM_RECENTS,
                "startActivityFromRecents()");

        final int callingPid = Binder.getCallingPid();
        final int callingUid = Binder.getCallingUid();
        final SafeActivityOptions safeOptions = SafeActivityOptions.fromBundle(bOptions);
        final long origId = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                return mStackSupervisor.startActivityFromRecents(callingPid, callingUid, taskId,
                        safeOptions);
            }
        } finally {
            Binder.restoreCallingIdentity(origId);
        }
    }

    /**
     * Public API to check if the client is allowed to start an activity on specified display.
     *
     * If the target display is private or virtual, some restrictions will apply.
     *
     * @param displayId Target display id.
     * @param intent Intent used to launch the activity.
     * @param resolvedType The MIME type of the intent.
     * @param userId The id of the user for whom the call is made.
     * @return {@code true} if a call to start an activity on the target display should succeed and
     *         no {@link SecurityException} will be thrown, {@code false} otherwise.
     */
    @Override
    public final boolean isActivityStartAllowedOnDisplay(int displayId, Intent intent,
            String resolvedType, int userId) {
        final int callingUid = Binder.getCallingUid();
        final int callingPid = Binder.getCallingPid();
        final long origId = Binder.clearCallingIdentity();

        try {
            // Collect information about the target of the Intent.
            ActivityInfo aInfo = mStackSupervisor.resolveActivity(intent, resolvedType,
                    0 /* startFlags */, null /* profilerInfo */, userId,
                    ActivityStarter.computeResolveFilterUid(callingUid, callingUid,
                            UserHandle.USER_NULL));
            aInfo = mAmInternal.getActivityInfoForUser(aInfo, userId);

            synchronized (mGlobalLock) {
                return mStackSupervisor.canPlaceEntityOnDisplay(displayId, callingPid, callingUid,
                        aInfo);
            }
        } finally {
            Binder.restoreCallingIdentity(origId);
        }
    }

    /**
     * This is the internal entry point for handling Activity.finish().
     *
     * @param token The Binder token referencing the Activity we want to finish.
     * @param resultCode Result code, if any, from this Activity.
     * @param resultData Result data (Intent), if any, from this Activity.
     * @param finishTask Whether to finish the task associated with this Activity.
     *
     * @return Returns true if the activity successfully finished, or false if it is still running.
     */
    @Override
    public final boolean finishActivity(IBinder token, int resultCode, Intent resultData,
            int finishTask) {
        // Refuse possible leaked file descriptors
        if (resultData != null && resultData.hasFileDescriptors()) {
            throw new IllegalArgumentException("File descriptors passed in Intent");
        }

        synchronized (mGlobalLock) {
            final ActivityRecord r = ActivityRecord.isInStackLocked(token);
            if (r == null) {
                return true;
            }
            // Keep track of the root activity of the task before we finish it
            final Task tr = r.getTask();
            final ActivityRecord rootR = tr.getRootActivity();
            if (rootR == null) {
                Slog.w(TAG, "Finishing task with all activities already finished");
            }
            // Do not allow task to finish if last task in lockTask mode. Launchable priv-apps can
            // finish.
            if (getLockTaskController().activityBlockedFromFinish(r)) {
                return false;
            }

            // TODO: There is a dup. of this block of code in ActivityStack.navigateUpToLocked
            // We should consolidate.
            if (mController != null) {
                // Find the first activity that is not finishing.
                final ActivityRecord next =
                        r.getRootTask().topRunningActivity(token, INVALID_TASK_ID);
                if (next != null) {
                    // ask watcher if this is allowed
                    boolean resumeOK = true;
                    try {
                        resumeOK = mController.activityResuming(next.packageName);
                    } catch (RemoteException e) {
                        mController = null;
                        Watchdog.getInstance().setActivityController(null);
                    }

                    if (!resumeOK) {
                        Slog.i(TAG, "Not finishing activity because controller resumed");
                        return false;
                    }
                }
            }

            // note down that the process has finished an activity and is in background activity
            // starts grace period
            if (r.app != null) {
                r.app.setLastActivityFinishTimeIfNeeded(SystemClock.uptimeMillis());
            }

            final long origId = Binder.clearCallingIdentity();
            Trace.traceBegin(TRACE_TAG_WINDOW_MANAGER, "finishActivity");
            try {
                boolean res;
                final boolean finishWithRootActivity =
                        finishTask == Activity.FINISH_TASK_WITH_ROOT_ACTIVITY;
                if (finishTask == Activity.FINISH_TASK_WITH_ACTIVITY
                        || (finishWithRootActivity && r == rootR)) {
                    // If requested, remove the task that is associated to this activity only if it
                    // was the root activity in the task. The result code and data is ignored
                    // because we don't support returning them across task boundaries. Also, to
                    // keep backwards compatibility we remove the task from recents when finishing
                    // task with root activity.
                    mStackSupervisor.removeTask(tr, false /*killProcess*/,
                            finishWithRootActivity, "finish-activity");
                    res = true;
                    // Explicitly dismissing the activity so reset its relaunch flag.
                    r.mRelaunchReason = RELAUNCH_REASON_NONE;
                } else {
                    r.finishIfPossible(resultCode, resultData, "app-request", true /* oomAdj */);
                    res = r.finishing;
                    if (!res) {
                        Slog.i(TAG, "Failed to finish by app-request");
                    }
                }
                return res;
            } finally {
                Trace.traceEnd(TRACE_TAG_WINDOW_MANAGER);
                Binder.restoreCallingIdentity(origId);
            }
        }
    }

    @Override
    public boolean finishActivityAffinity(IBinder token) {
        synchronized (mGlobalLock) {
            final long origId = Binder.clearCallingIdentity();
            try {
                ActivityRecord r = ActivityRecord.isInStackLocked(token);
                if (r == null) {
                    return false;
                }

                // Do not allow task to finish if last task in lockTask mode. Launchable priv-apps
                // can finish.
                if (getLockTaskController().activityBlockedFromFinish(r)) {
                    return false;
                }

                final PooledFunction p = PooledLambda.obtainFunction(
                        ActivityRecord::finishIfSameAffinity, r,
                        PooledLambda.__(ActivityRecord.class));
                r.getTask().forAllActivities(
                        p, r, true /*includeBoundary*/, true /*traverseTopToBottom*/);
                p.recycle();

                return true;
            } finally {
                Binder.restoreCallingIdentity(origId);
            }
        }
    }

    @Override
    public final void activityIdle(IBinder token, Configuration config, boolean stopProfiling) {
        final long origId = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                Trace.traceBegin(TRACE_TAG_WINDOW_MANAGER, "activityIdle");
                final ActivityRecord r = ActivityRecord.forTokenLocked(token);
                if (r == null) {
                    return;
                }
                mStackSupervisor.activityIdleInternal(r, false /* fromTimeout */,
                        false /* processPausingActivities */, config);
                if (stopProfiling && r.hasProcess()) {
                    r.app.clearProfilerIfNeeded();
                }
            }
        } finally {
            Trace.traceEnd(TRACE_TAG_WINDOW_MANAGER);
            Binder.restoreCallingIdentity(origId);
        }
    }

    @Override
    public final void activityResumed(IBinder token) {
        final long origId = Binder.clearCallingIdentity();
        synchronized (mGlobalLock) {
            ActivityRecord.activityResumedLocked(token);
        }
        Binder.restoreCallingIdentity(origId);
    }

    @Override
    public final void activityTopResumedStateLost() {
        final long origId = Binder.clearCallingIdentity();
        synchronized (mGlobalLock) {
            mStackSupervisor.handleTopResumedStateReleased(false /* timeout */);
        }
        Binder.restoreCallingIdentity(origId);
    }

    @Override
    public final void activityPaused(IBinder token) {
        final long origId = Binder.clearCallingIdentity();
        synchronized (mGlobalLock) {
            Trace.traceBegin(TRACE_TAG_WINDOW_MANAGER, "activityPaused");
            final ActivityRecord r = ActivityRecord.forTokenLocked(token);
            if (r != null) {
                r.activityPaused(false);
            }
            Trace.traceEnd(TRACE_TAG_WINDOW_MANAGER);
        }
        Binder.restoreCallingIdentity(origId);
    }

    @Override
    public final void activityStopped(IBinder token, Bundle icicle,
            PersistableBundle persistentState, CharSequence description) {
        if (DEBUG_ALL) Slog.v(TAG, "Activity stopped: token=" + token);

        // Refuse possible leaked file descriptors
        if (icicle != null && icicle.hasFileDescriptors()) {
            throw new IllegalArgumentException("File descriptors passed in Bundle");
        }

        final long origId = Binder.clearCallingIdentity();

        String restartingName = null;
        int restartingUid = 0;
        final ActivityRecord r;
        synchronized (mGlobalLock) {
            Trace.traceBegin(TRACE_TAG_WINDOW_MANAGER, "activityStopped");
            r = ActivityRecord.isInStackLocked(token);
            if (r != null) {
                if (r.attachedToProcess()
                        && r.isState(ActivityStack.ActivityState.RESTARTING_PROCESS)) {
                    // The activity was requested to restart from
                    // {@link #restartActivityProcessIfVisible}.
                    restartingName = r.app.mName;
                    restartingUid = r.app.mUid;
                }
                r.activityStopped(icicle, persistentState, description);
            }
            Trace.traceEnd(TRACE_TAG_WINDOW_MANAGER);
        }

        if (restartingName != null) {
            // In order to let the foreground activity can be restarted with its saved state from
            // {@link android.app.Activity#onSaveInstanceState}, the kill operation is postponed
            // until the activity reports stopped with the state. And the activity record will be
            // kept because the record state is restarting, then the activity will be restarted
            // immediately if it is still the top one.
            mStackSupervisor.removeRestartTimeouts(r);
            mAmInternal.killProcess(restartingName, restartingUid, "restartActivityProcess");
        }
        mAmInternal.trimApplications();

        Binder.restoreCallingIdentity(origId);
    }

    @Override
    public final void activityDestroyed(IBinder token) {
        if (DEBUG_SWITCH) Slog.v(TAG_SWITCH, "ACTIVITY DESTROYED: " + token);
        synchronized (mGlobalLock) {
            final long origId = Binder.clearCallingIdentity();
            Trace.traceBegin(TRACE_TAG_WINDOW_MANAGER, "activityDestroyed");
            try {
                final ActivityRecord activity = ActivityRecord.forTokenLocked(token);
                if (activity != null) {
                    activity.destroyed("activityDestroyed");
                }
            } finally {
                Trace.traceEnd(TRACE_TAG_WINDOW_MANAGER);
                Binder.restoreCallingIdentity(origId);
            }
        }
    }

    @Override
    public final void activityRelaunched(IBinder token) {
        final long origId = Binder.clearCallingIdentity();
        synchronized (mGlobalLock) {
            mStackSupervisor.activityRelaunchedLocked(token);
        }
        Binder.restoreCallingIdentity(origId);
    }

    @Override
    public void setRequestedOrientation(IBinder token, int requestedOrientation) {
        synchronized (mGlobalLock) {
            ActivityRecord r = ActivityRecord.isInStackLocked(token);
            if (r == null) {
                return;
            }
            final long origId = Binder.clearCallingIdentity();
            try {
                r.setRequestedOrientation(requestedOrientation);
            } finally {
                Binder.restoreCallingIdentity(origId);
            }
        }
    }

    @Override
    public int getRequestedOrientation(IBinder token) {
        synchronized (mGlobalLock) {
            final ActivityRecord r = ActivityRecord.isInStackLocked(token);
            return (r != null)
                    ? r.getRequestedOrientation() : ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED;
        }
    }

    @Override
    public void setImmersive(IBinder token, boolean immersive) {
        synchronized (mGlobalLock) {
            final ActivityRecord r = ActivityRecord.isInStackLocked(token);
            if (r == null) {
                throw new IllegalArgumentException();
            }
            r.immersive = immersive;

            // update associated state if we're frontmost
            if (r.isResumedActivityOnDisplay()) {
                if (DEBUG_IMMERSIVE) Slog.d(TAG_IMMERSIVE, "Frontmost changed immersion: "+ r);
                applyUpdateLockStateLocked(r);
            }
        }
    }

    void applyUpdateLockStateLocked(ActivityRecord r) {
        // Modifications to the UpdateLock state are done on our handler, outside
        // the activity manager's locks.  The new state is determined based on the
        // state *now* of the relevant activity record.  The object is passed to
        // the handler solely for logging detail, not to be consulted/modified.
        final boolean nextState = r != null && r.immersive;
        mH.post(() -> {
            if (mUpdateLock.isHeld() != nextState) {
                if (DEBUG_IMMERSIVE) Slog.d(TAG_IMMERSIVE,
                        "Applying new update lock state '" + nextState + "' for " + r);
                if (nextState) {
                    mUpdateLock.acquire();
                } else {
                    mUpdateLock.release();
                }
            }
        });
    }

    @Override
    public boolean isImmersive(IBinder token) {
        synchronized (mGlobalLock) {
            final ActivityRecord r = ActivityRecord.isInStackLocked(token);
            if (r == null) {
                throw new IllegalArgumentException();
            }
            return r.immersive;
        }
    }

    @Override
    public boolean isTopActivityImmersive() {
        enforceNotIsolatedCaller("isTopActivityImmersive");
        synchronized (mGlobalLock) {
            final ActivityRecord r = getTopDisplayFocusedStack().topRunningActivity();
            return (r != null) ? r.immersive : false;
        }
    }

    @Override
    public void overridePendingTransition(IBinder token, String packageName,
            int enterAnim, int exitAnim) {
        synchronized (mGlobalLock) {
            ActivityRecord self = ActivityRecord.isInStackLocked(token);
            if (self == null) {
                return;
            }

            final long origId = Binder.clearCallingIdentity();

            if (self.isState(
                    ActivityStack.ActivityState.RESUMED, ActivityStack.ActivityState.PAUSING)) {
                self.getDisplay().mDisplayContent.mAppTransition.overridePendingAppTransition(
                        packageName, enterAnim, exitAnim, null);
            }

            Binder.restoreCallingIdentity(origId);
        }
    }

    @Override
    public int getFrontActivityScreenCompatMode() {
        enforceNotIsolatedCaller("getFrontActivityScreenCompatMode");
        synchronized (mGlobalLock) {
            final ActivityRecord r = getTopDisplayFocusedStack().topRunningActivity();
            if (r == null) {
                return ActivityManager.COMPAT_MODE_UNKNOWN;
            }
            return mCompatModePackages.computeCompatModeLocked(r.info.applicationInfo);
        }
    }

    @Override
    public void setFrontActivityScreenCompatMode(int mode) {
        mAmInternal.enforceCallingPermission(android.Manifest.permission.SET_SCREEN_COMPATIBILITY,
                "setFrontActivityScreenCompatMode");
        ApplicationInfo ai;
        synchronized (mGlobalLock) {
            final ActivityRecord r = getTopDisplayFocusedStack().topRunningActivity();
            if (r == null) {
                Slog.w(TAG, "setFrontActivityScreenCompatMode failed: no top activity");
                return;
            }
            ai = r.info.applicationInfo;
            mCompatModePackages.setPackageScreenCompatModeLocked(ai, mode);
        }
    }

    @Override
    public int getLaunchedFromUid(IBinder activityToken) {
        ActivityRecord srec;
        synchronized (mGlobalLock) {
            srec = ActivityRecord.forTokenLocked(activityToken);
        }
        if (srec == null) {
            return -1;
        }
        return srec.launchedFromUid;
    }

    @Override
    public String getLaunchedFromPackage(IBinder activityToken) {
        ActivityRecord srec;
        synchronized (mGlobalLock) {
            srec = ActivityRecord.forTokenLocked(activityToken);
        }
        if (srec == null) {
            return null;
        }
        return srec.launchedFromPackage;
    }

    @Override
    public boolean convertFromTranslucent(IBinder token) {
        final long origId = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                final ActivityRecord r = ActivityRecord.isInStackLocked(token);
                if (r == null) {
                    return false;
                }
                return r.setOccludesParent(true);
            }
        } finally {
            Binder.restoreCallingIdentity(origId);
        }
    }

    @Override
    public boolean convertToTranslucent(IBinder token, Bundle options) {
        SafeActivityOptions safeOptions = SafeActivityOptions.fromBundle(options);
        final long origId = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                final ActivityRecord r = ActivityRecord.isInStackLocked(token);
                if (r == null) {
                    return false;
                }
                final ActivityRecord under = r.getTask().getActivityBelow(r);
                if (under != null) {
                    under.returningOptions = safeOptions != null ? safeOptions.getOptions(r) : null;
                }
                return r.setOccludesParent(false);
            }
        } finally {
            Binder.restoreCallingIdentity(origId);
        }
    }

    @Override
    public void notifyActivityDrawn(IBinder token) {
        if (DEBUG_VISIBILITY) Slog.d(TAG_VISIBILITY, "notifyActivityDrawn: token=" + token);
        synchronized (mGlobalLock) {
            ActivityRecord r = mRootWindowContainer.isInAnyStack(token);
            if (r != null) {
                r.getRootTask().notifyActivityDrawnLocked(r);
            }
        }
    }

    @Override
    public void reportActivityFullyDrawn(IBinder token, boolean restoredFromBundle) {
        synchronized (mGlobalLock) {
            ActivityRecord r = ActivityRecord.isInStackLocked(token);
            if (r == null) {
                return;
            }
            r.reportFullyDrawnLocked(restoredFromBundle);
        }
    }

    @Override
    public int getDisplayId(IBinder activityToken) throws RemoteException {
        synchronized (mGlobalLock) {
            final ActivityStack stack = ActivityRecord.getStackLocked(activityToken);
            if (stack != null) {
                final int displayId = stack.getDisplayId();
                return displayId != INVALID_DISPLAY ? displayId : DEFAULT_DISPLAY;
            }
            return DEFAULT_DISPLAY;
        }
    }

    @Override
    public ActivityManager.StackInfo getFocusedStackInfo() throws RemoteException {
        enforceCallerIsRecentsOrHasPermission(MANAGE_ACTIVITY_STACKS, "getStackInfo()");
        long ident = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                ActivityStack focusedStack = getTopDisplayFocusedStack();
                if (focusedStack != null) {
                    return mRootWindowContainer.getStackInfo(focusedStack.mTaskId);
                }
                return null;
            }
        } finally {
            Binder.restoreCallingIdentity(ident);
        }
    }

    @Override
    public void setFocusedStack(int stackId) {
        mAmInternal.enforceCallingPermission(MANAGE_ACTIVITY_STACKS, "setFocusedStack()");
        if (DEBUG_FOCUS) Slog.d(TAG_FOCUS, "setFocusedStack: stackId=" + stackId);
        final long callingId = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                final ActivityStack stack = mRootWindowContainer.getStack(stackId);
                if (stack == null) {
                    Slog.w(TAG, "setFocusedStack: No stack with id=" + stackId);
                    return;
                }
                final ActivityRecord r = stack.topRunningActivity();
                if (r != null && r.moveFocusableActivityToTop("setFocusedStack")) {
                    mRootWindowContainer.resumeFocusedStacksTopActivities();
                }
            }
        } finally {
            Binder.restoreCallingIdentity(callingId);
        }
    }

    @Override
    public void setFocusedTask(int taskId) {
        mAmInternal.enforceCallingPermission(MANAGE_ACTIVITY_STACKS, "setFocusedTask()");
        if (DEBUG_FOCUS) Slog.d(TAG_FOCUS, "setFocusedTask: taskId=" + taskId);
        final long callingId = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                final Task task = mRootWindowContainer.anyTaskForId(taskId,
                        MATCH_TASK_IN_STACKS_ONLY);
                if (task == null) {
                    return;
                }
                final ActivityRecord r = task.topRunningActivityLocked();
                if (r != null && r.moveFocusableActivityToTop("setFocusedTask")) {
                    mRootWindowContainer.resumeFocusedStacksTopActivities();
                }
            }
        } finally {
            Binder.restoreCallingIdentity(callingId);
        }
    }

    @Override
    public void restartActivityProcessIfVisible(IBinder activityToken) {
        mAmInternal.enforceCallingPermission(MANAGE_ACTIVITY_STACKS, "restartActivityProcess()");
        final long callingId = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                final ActivityRecord r = ActivityRecord.isInStackLocked(activityToken);
                if (r == null) {
                    return;
                }
                r.restartProcessIfVisible();
            }
        } finally {
            Binder.restoreCallingIdentity(callingId);
        }
    }

    @Override
    public boolean removeTask(int taskId) {
        enforceCallerIsRecentsOrHasPermission(REMOVE_TASKS, "removeTask()");
        synchronized (mGlobalLock) {
            final long ident = Binder.clearCallingIdentity();
            try {
                return mStackSupervisor.removeTaskById(taskId, true, REMOVE_FROM_RECENTS,
                        "remove-task");
            } finally {
                Binder.restoreCallingIdentity(ident);
            }
        }
    }

    @Override
    public void removeAllVisibleRecentTasks() {
        enforceCallerIsRecentsOrHasPermission(REMOVE_TASKS, "removeAllVisibleRecentTasks()");
        synchronized (mGlobalLock) {
            final long ident = Binder.clearCallingIdentity();
            try {
                getRecentTasks().removeAllVisibleTasks(mAmInternal.getCurrentUserId());
            } finally {
                Binder.restoreCallingIdentity(ident);
            }
        }
    }

    @Override
    public boolean shouldUpRecreateTask(IBinder token, String destAffinity) {
        synchronized (mGlobalLock) {
            final ActivityRecord srec = ActivityRecord.forTokenLocked(token);
            if (srec != null) {
                return srec.getRootTask().shouldUpRecreateTaskLocked(srec, destAffinity);
            }
        }
        return false;
    }

    @Override
    public boolean navigateUpTo(IBinder token, Intent destIntent, int resultCode,
            Intent resultData) {

        synchronized (mGlobalLock) {
            final ActivityRecord r = ActivityRecord.forTokenLocked(token);
            if (r != null) {
                return r.getRootTask().navigateUpTo(
                        r, destIntent, resultCode, resultData);
            }
            return false;
        }
    }

    /**
     * Attempts to move a task backwards in z-order (the order of activities within the task is
     * unchanged).
     *
     * There are several possible results of this call:
     * - if the task is locked, then we will show the lock toast
     * - if there is a task behind the provided task, then that task is made visible and resumed as
     *   this task is moved to the back
     * - otherwise, if there are no other tasks in the stack:
     *     - if this task is in the pinned stack, then we remove the stack completely, which will
     *       have the effect of moving the task to the top or bottom of the fullscreen stack
     *       (depending on whether it is visible)
     *     - otherwise, we simply return home and hide this task
     *
     * @param token A reference to the activity we wish to move
     * @param nonRoot If false then this only works if the activity is the root
     *                of a task; if true it will work for any activity in a task.
     * @return Returns true if the move completed, false if not.
     */
    @Override
    public boolean moveActivityTaskToBack(IBinder token, boolean nonRoot) {
        enforceNotIsolatedCaller("moveActivityTaskToBack");
        synchronized (mGlobalLock) {
            final long origId = Binder.clearCallingIdentity();
            try {
                int taskId = ActivityRecord.getTaskForActivityLocked(token, !nonRoot);
                final Task task = mRootWindowContainer.anyTaskForId(taskId);
                if (task != null) {
                    return ActivityRecord.getStackLocked(token).moveTaskToBack(task);
                }
            } finally {
                Binder.restoreCallingIdentity(origId);
            }
        }
        return false;
    }

    @Override
    public Rect getTaskBounds(int taskId) {
        mAmInternal.enforceCallingPermission(MANAGE_ACTIVITY_STACKS, "getTaskBounds()");
        long ident = Binder.clearCallingIdentity();
        Rect rect = new Rect();
        try {
            synchronized (mGlobalLock) {
                final Task task = mRootWindowContainer.anyTaskForId(taskId,
                        MATCH_TASK_IN_STACKS_OR_RECENT_TASKS);
                if (task == null) {
                    Slog.w(TAG, "getTaskBounds: taskId=" + taskId + " not found");
                    return rect;
                }
                if (task.getParent() != null) {
                    rect.set(task.getBounds());
                } else if (task.mLastNonFullscreenBounds != null) {
                    rect.set(task.mLastNonFullscreenBounds);
                }
            }
        } finally {
            Binder.restoreCallingIdentity(ident);
        }
        return rect;
    }

    @Override
    public ActivityManager.TaskDescription getTaskDescription(int id) {
        synchronized (mGlobalLock) {
            enforceCallerIsRecentsOrHasPermission(
                    MANAGE_ACTIVITY_STACKS, "getTaskDescription()");
            final Task tr = mRootWindowContainer.anyTaskForId(id,
                    MATCH_TASK_IN_STACKS_OR_RECENT_TASKS);
            if (tr != null) {
                return tr.getTaskDescription();
            }
        }
        return null;
    }

    @Override
    public boolean setTaskWindowingMode(int taskId, int windowingMode, boolean toTop) {
        if (windowingMode == WINDOWING_MODE_SPLIT_SCREEN_PRIMARY) {
            return setTaskWindowingModeSplitScreenPrimary(taskId,
                    SPLIT_SCREEN_CREATE_MODE_TOP_OR_LEFT,
                    toTop, ANIMATE, null /* initialBounds */, true /* showRecents */);
        }
        enforceCallerIsRecentsOrHasPermission(MANAGE_ACTIVITY_STACKS, "setTaskWindowingMode()");
        synchronized (mGlobalLock) {
            final long ident = Binder.clearCallingIdentity();
            try {
                if (WindowConfiguration.isSplitScreenWindowingMode(windowingMode)) {
                    return setTaskWindowingModeSplitScreen(taskId, windowingMode, toTop);
                }
                final Task task = mRootWindowContainer.anyTaskForId(taskId,
                        MATCH_TASK_IN_STACKS_ONLY);
                if (task == null) {
                    Slog.w(TAG, "setTaskWindowingMode: No task for id=" + taskId);
                    return false;
                }

                if (DEBUG_STACK) Slog.d(TAG_STACK, "setTaskWindowingMode: moving task=" + taskId
                        + " to windowingMode=" + windowingMode + " toTop=" + toTop);

                if (!task.isActivityTypeStandardOrUndefined()) {
                    throw new IllegalArgumentException("setTaskWindowingMode: Attempt to move"
                            + " non-standard task " + taskId + " to windowing mode="
                            + windowingMode);
                }

                final ActivityStack stack = task.getStack();
                // Convert some windowing-mode changes into root-task reparents for split-screen.
                if (stack.getTile() != null) {
                    stack.getDisplay().onSplitScreenModeDismissed();
                }
                if (toTop) {
                    stack.moveToFront("setTaskWindowingMode", task);
                }
                stack.setWindowingMode(windowingMode);
                stack.getDisplay().ensureActivitiesVisible(null, 0, PRESERVE_WINDOWS,
                        true /* notifyClients */);
                return true;
            } finally {
                Binder.restoreCallingIdentity(ident);
            }
        }
    }

    @Override
    public String getCallingPackage(IBinder token) {
        synchronized (mGlobalLock) {
            ActivityRecord r = getCallingRecordLocked(token);
            return r != null ? r.info.packageName : null;
        }
    }

    @Override
    public ComponentName getCallingActivity(IBinder token) {
        synchronized (mGlobalLock) {
            ActivityRecord r = getCallingRecordLocked(token);
            return r != null ? r.intent.getComponent() : null;
        }
    }

    private ActivityRecord getCallingRecordLocked(IBinder token) {
        ActivityRecord r = ActivityRecord.isInStackLocked(token);
        if (r == null) {
            return null;
        }
        return r.resultTo;
    }

    @Override
    public void unhandledBack() {
        mAmInternal.enforceCallingPermission(android.Manifest.permission.FORCE_BACK, "unhandledBack()");

        synchronized (mGlobalLock) {
            final long origId = Binder.clearCallingIdentity();
            try {
                getTopDisplayFocusedStack().unhandledBackLocked();
            } finally {
                Binder.restoreCallingIdentity(origId);
            }
        }
    }

    @Override
    public void onBackPressedOnTaskRoot(IBinder token, IRequestFinishCallback callback) {
        synchronized (mGlobalLock) {
            ActivityRecord r = ActivityRecord.isInStackLocked(token);
            if (r == null) {
                return;
            }
            ActivityStack stack = r.getRootTask();
            if (stack != null && stack.isSingleTaskInstance()) {
                // Single-task stacks are used for activities which are presented in floating
                // windows above full screen activities. Instead of directly finishing the
                // task, a task change listener is used to notify SystemUI so the action can be
                // handled specially.
                final Task task = r.getTask();
                mTaskChangeNotificationController
                        .notifyBackPressedOnTaskRoot(task.getTaskInfo());
            } else {
                try {
                    callback.requestFinish();
                } catch (RemoteException e) {
                    Slog.e(TAG, "Failed to invoke request finish callback", e);
                }
            }
        }
    }

    /**
     * TODO: Add mController hook
     */
    @Override
    public void moveTaskToFront(IApplicationThread appThread, String callingPackage, int taskId,
            int flags, Bundle bOptions) {
        mAmInternal.enforceCallingPermission(android.Manifest.permission.REORDER_TASKS, "moveTaskToFront()");

        if (DEBUG_STACK) Slog.d(TAG_STACK, "moveTaskToFront: moving taskId=" + taskId);
        synchronized (mGlobalLock) {
            moveTaskToFrontLocked(appThread, callingPackage, taskId, flags,
                    SafeActivityOptions.fromBundle(bOptions), false /* fromRecents */);
        }
    }

    void moveTaskToFrontLocked(@Nullable IApplicationThread appThread,
            @Nullable String callingPackage, int taskId, int flags, SafeActivityOptions options,
            boolean fromRecents) {
        final int callingPid = Binder.getCallingPid();
        final int callingUid = Binder.getCallingUid();
        assertPackageMatchesCallingUid(callingPackage);
        if (!checkAppSwitchAllowedLocked(callingPid, callingUid, -1, -1, "Task to front")) {
            SafeActivityOptions.abort(options);
            return;
        }
        final long origId = Binder.clearCallingIdentity();
        WindowProcessController callerApp = null;
        if (appThread != null) {
            callerApp = getProcessController(appThread);
        }
        final ActivityStarter starter = getActivityStartController().obtainStarter(
                null /* intent */, "moveTaskToFront");
        if (starter.shouldAbortBackgroundActivityStart(callingUid, callingPid, callingPackage, -1,
                -1, callerApp, null, false, false, null)) {
            if (!isBackgroundActivityStartsEnabled()) {
                return;
            }
        }
        try {
            final Task task = mRootWindowContainer.anyTaskForId(taskId);
            if (task == null) {
                Slog.d(TAG, "Could not find task for id: "+ taskId);
                SafeActivityOptions.abort(options);
                return;
            }
            if (getLockTaskController().isLockTaskModeViolation(task)) {
                Slog.e(TAG, "moveTaskToFront: Attempt to violate Lock Task Mode");
                SafeActivityOptions.abort(options);
                return;
            }
            ActivityOptions realOptions = options != null
                    ? options.getOptions(mStackSupervisor)
                    : null;
            mStackSupervisor.findTaskToMoveToFront(task, flags, realOptions, "moveTaskToFront",
                    false /* forceNonResizable */);

            final ActivityRecord topActivity = task.getTopNonFinishingActivity();
            if (topActivity != null) {

                // We are reshowing a task, use a starting window to hide the initial draw delay
                // so the transition can start earlier.
                topActivity.showStartingWindow(null /* prev */, false /* newTask */,
                        true /* taskSwitch */, fromRecents);
            }
        } finally {
            Binder.restoreCallingIdentity(origId);
        }
    }

    /**
     * Return true if callingUid is system, or packageName belongs to that callingUid.
     */
    private boolean isSameApp(int callingUid, @Nullable String packageName) {
        try {
            if (callingUid != 0 && callingUid != SYSTEM_UID) {
                if (packageName == null) {
                    return false;
                }
                final int uid = AppGlobals.getPackageManager().getPackageUid(packageName,
                        PackageManager.MATCH_DEBUG_TRIAGED_MISSING,
                        UserHandle.getUserId(callingUid));
                return UserHandle.isSameApp(callingUid, uid);
            }
        } catch (RemoteException e) {
            // Should not happen
        }
        return true;
    }

    /**
     * Checks that the provided package name matches the current calling UID, throws a security
     * exception if it doesn't.
     */
    void assertPackageMatchesCallingUid(@Nullable String packageName) {
        final int callingUid = Binder.getCallingUid();
        if (isSameApp(callingUid, packageName)) {
            return;
        }
        final String msg = "Permission Denial: package=" + packageName
                + " does not belong to uid=" + callingUid;
        Slog.w(TAG, msg);
        throw new SecurityException(msg);
    }

    boolean checkAppSwitchAllowedLocked(int sourcePid, int sourceUid,
            int callingPid, int callingUid, String name) {
        if (mAppSwitchesAllowedTime < SystemClock.uptimeMillis()) {
            return true;
        }

        if (getRecentTasks().isCallerRecents(sourceUid)) {
            return true;
        }

        int perm = checkComponentPermission(STOP_APP_SWITCHES, sourcePid, sourceUid, -1, true);
        if (perm == PackageManager.PERMISSION_GRANTED) {
            return true;
        }
        if (checkAllowAppSwitchUid(sourceUid)) {
            return true;
        }

        // If the actual IPC caller is different from the logical source, then
        // also see if they are allowed to control app switches.
        if (callingUid != -1 && callingUid != sourceUid) {
            perm = checkComponentPermission(STOP_APP_SWITCHES, callingPid, callingUid, -1, true);
            if (perm == PackageManager.PERMISSION_GRANTED) {
                return true;
            }
            if (checkAllowAppSwitchUid(callingUid)) {
                return true;
            }
        }

        Slog.w(TAG, name + " request from " + sourceUid + " stopped");
        return false;
    }

    private boolean checkAllowAppSwitchUid(int uid) {
        ArrayMap<String, Integer> types = mAllowAppSwitchUids.get(UserHandle.getUserId(uid));
        if (types != null) {
            for (int i = types.size() - 1; i >= 0; i--) {
                if (types.valueAt(i).intValue() == uid) {
                    return true;
                }
            }
        }
        return false;
    }

    @Override
    public void setActivityController(IActivityController controller, boolean imAMonkey) {
        mAmInternal.enforceCallingPermission(android.Manifest.permission.SET_ACTIVITY_WATCHER,
                "setActivityController()");
        synchronized (mGlobalLock) {
            mController = controller;
            mControllerIsAMonkey = imAMonkey;
            Watchdog.getInstance().setActivityController(controller);
        }
    }

    public boolean isControllerAMonkey() {
        synchronized (mGlobalLock) {
            return mController != null && mControllerIsAMonkey;
        }
    }

    @Override
    public int getTaskForActivity(IBinder token, boolean onlyRoot) {
        synchronized (mGlobalLock) {
            return ActivityRecord.getTaskForActivityLocked(token, onlyRoot);
        }
    }

    @Override
    public List<ActivityManager.RunningTaskInfo> getTasks(int maxNum) {
        return getFilteredTasks(maxNum, ACTIVITY_TYPE_UNDEFINED, WINDOWING_MODE_UNDEFINED);
    }

    @Override
    public List<ActivityManager.RunningTaskInfo> getFilteredTasks(int maxNum,
            @WindowConfiguration.ActivityType int ignoreActivityType,
            @WindowConfiguration.WindowingMode int ignoreWindowingMode) {
        final int callingUid = Binder.getCallingUid();
        final int callingPid = Binder.getCallingPid();
        final boolean crossUser = isCrossUserAllowed(callingPid, callingUid);
        final int[] profileIds = getUserManager().getProfileIds(
                UserHandle.getUserId(callingUid), true);
        ArraySet<Integer> callingProfileIds = new ArraySet<>();
        for (int i = 0; i < profileIds.length; i++) {
            callingProfileIds.add(profileIds[i]);
        }
        ArrayList<ActivityManager.RunningTaskInfo> list = new ArrayList<>();

        synchronized (mGlobalLock) {
            if (DEBUG_ALL) Slog.v(TAG, "getTasks: max=" + maxNum);

            final boolean allowed = isGetTasksAllowed("getTasks", callingPid, callingUid);
            mRootWindowContainer.getRunningTasks(maxNum, list, ignoreActivityType,
                    ignoreWindowingMode, callingUid, allowed, crossUser, callingProfileIds);
        }

        return list;
    }

    @Override
    public final void finishSubActivity(IBinder token, String resultWho, int requestCode) {
        synchronized (mGlobalLock) {
            final long origId = Binder.clearCallingIdentity();
            try {
                ActivityRecord r = ActivityRecord.isInStackLocked(token);
                if (r == null) return;

                final PooledConsumer c = PooledLambda.obtainConsumer(
                        ActivityRecord::finishIfSubActivity, PooledLambda.__(ActivityRecord.class),
                        r, resultWho, requestCode);
                // TODO: This should probably only loop over the task since you need to be in the
                // same task to return results.
                r.getRootTask().forAllActivities(c);
                c.recycle();

                updateOomAdj();
            } finally {
                Binder.restoreCallingIdentity(origId);
            }
        }
    }

    @Override
    public boolean willActivityBeVisible(IBinder token) {
        synchronized (mGlobalLock) {
            ActivityStack stack = ActivityRecord.getStackLocked(token);
            if (stack != null) {
                return stack.willActivityBeVisible(token);
            }
            return false;
        }
    }

    @Override
    public void moveTaskToStack(int taskId, int stackId, boolean toTop) {
        enforceCallerIsRecentsOrHasPermission(MANAGE_ACTIVITY_STACKS, "moveTaskToStack()");
        synchronized (mGlobalLock) {
            final long ident = Binder.clearCallingIdentity();
            try {
                final Task task = mRootWindowContainer.anyTaskForId(taskId);
                if (task == null) {
                    Slog.w(TAG, "moveTaskToStack: No task for id=" + taskId);
                    return;
                }

                if (DEBUG_STACK) Slog.d(TAG_STACK, "moveTaskToStack: moving task=" + taskId
                        + " to stackId=" + stackId + " toTop=" + toTop);

                final ActivityStack stack = mRootWindowContainer.getStack(stackId);
                if (stack == null) {
                    throw new IllegalStateException(
                            "moveTaskToStack: No stack for stackId=" + stackId);
                }
                if (!stack.isActivityTypeStandardOrUndefined()) {
                    throw new IllegalArgumentException("moveTaskToStack: Attempt to move task "
                            + taskId + " to stack " + stackId);
                }
                if (stack.inSplitScreenPrimaryWindowingMode()) {
                    mWindowManager.setDockedStackCreateStateLocked(
                            SPLIT_SCREEN_CREATE_MODE_TOP_OR_LEFT, null /* initialBounds */);
                }
                task.reparent(stack, toTop, REPARENT_KEEP_STACK_AT_FRONT, ANIMATE, !DEFER_RESUME,
                        "moveTaskToStack");
            } finally {
                Binder.restoreCallingIdentity(ident);
            }
        }
    }

    /**
     * Moves the specified task to the primary-split-screen stack.
     *
     * @param taskId Id of task to move.
     * @param createMode The mode the primary split screen stack should be created in if it doesn't
     *                   exist already. See
     *                   {@link android.app.ActivityTaskManager#SPLIT_SCREEN_CREATE_MODE_TOP_OR_LEFT}
     *                   and
     *                   {@link android.app.ActivityTaskManager#SPLIT_SCREEN_CREATE_MODE_BOTTOM_OR_RIGHT}
     * @param toTop If the task and stack should be moved to the top.
     * @param animate Whether we should play an animation for the moving the task.
     * @param initialBounds If the primary stack gets created, it will use these bounds for the
     *                      stack. Pass {@code null} to use default bounds.
     * @param showRecents If the recents activity should be shown on the other side of the task
     *                    going into split-screen mode.
     * @return Whether the task was successfully put into splitscreen.
     */
    @Override
    public boolean setTaskWindowingModeSplitScreenPrimary(int taskId, int createMode,
            boolean toTop, boolean animate, Rect initialBounds, boolean showRecents) {
        enforceCallerIsRecentsOrHasPermission(MANAGE_ACTIVITY_STACKS,
                "setTaskWindowingModeSplitScreenPrimary()");
        synchronized (mGlobalLock) {
            final long ident = Binder.clearCallingIdentity();
            try {
                return setTaskWindowingModeSplitScreen(taskId, WINDOWING_MODE_SPLIT_SCREEN_PRIMARY,
                        toTop);
            } finally {
                Binder.restoreCallingIdentity(ident);
            }
        }
    }

    /**
     * Moves the specified task into a split-screen tile.
     */
    private boolean setTaskWindowingModeSplitScreen(int taskId, int windowingMode, boolean toTop) {
        if (!WindowConfiguration.isSplitScreenWindowingMode(windowingMode)) {
            throw new IllegalArgumentException("Calling setTaskWindowingModeSplitScreen with non"
                    + "split-screen mode: " + windowingMode);
        }
        if (isInLockTaskMode()) {
            Slog.w(TAG, "setTaskWindowingModeSplitScreen: Is in lock task mode="
                    + getLockTaskModeState());
            return false;
        }

        final Task task = mRootWindowContainer.anyTaskForId(taskId,
                MATCH_TASK_IN_STACKS_ONLY);
        if (task == null) {
            Slog.w(TAG, "setTaskWindowingModeSplitScreenPrimary: No task for id=" + taskId);
            return false;
        }
        if (!task.isActivityTypeStandardOrUndefined()) {
            throw new IllegalArgumentException("setTaskWindowingMode: Attempt to move"
                    + " non-standard task " + taskId + " to split-screen windowing mode");
        }
        if (!task.supportsSplitScreenWindowingMode()) {
            return false;
        }

        final int prevMode = task.getWindowingMode();
        moveTaskToSplitScreenPrimaryTile(task, toTop);
        return prevMode != task.getWindowingMode();
    }

    void moveTaskToSplitScreenPrimaryTile(Task task, boolean toTop) {
        ActivityStack stack = task.getStack();
        TaskTile tile = null;
        for (int i = stack.getDisplay().getStackCount() - 1; i >= 0; --i) {
            tile = stack.getDisplay().getStackAt(i).asTile();
            if (tile != null && tile.getWindowingMode() == WINDOWING_MODE_SPLIT_SCREEN_PRIMARY) {
                break;
            }
        }
        if (tile == null) {
            throw new IllegalStateException("Can't enter split without associated tile");
        }
        WindowContainerTransaction wct = new WindowContainerTransaction();
        wct.reparent(stack.mRemoteToken, tile.mRemoteToken, toTop);
        mTaskOrganizerController.applyContainerTransaction(wct, null);
    }

    /**
     * Removes stacks in the input windowing modes from the system if they are of activity type
     * ACTIVITY_TYPE_STANDARD or ACTIVITY_TYPE_UNDEFINED
     */
    @Override
    public void removeStacksInWindowingModes(int[] windowingModes) {
        enforceCallerIsRecentsOrHasPermission(MANAGE_ACTIVITY_STACKS,
                "removeStacksInWindowingModes()");

        synchronized (mGlobalLock) {
            final long ident = Binder.clearCallingIdentity();
            try {
                mRootWindowContainer.removeStacksInWindowingModes(windowingModes);
            } finally {
                Binder.restoreCallingIdentity(ident);
            }
        }
    }

    @Override
    public void removeStacksWithActivityTypes(int[] activityTypes) {
        enforceCallerIsRecentsOrHasPermission(MANAGE_ACTIVITY_STACKS,
                "removeStacksWithActivityTypes()");

        synchronized (mGlobalLock) {
            final long ident = Binder.clearCallingIdentity();
            try {
                mRootWindowContainer.removeStacksWithActivityTypes(activityTypes);
            } finally {
                Binder.restoreCallingIdentity(ident);
            }
        }
    }

    @Override
    public ParceledListSlice<ActivityManager.RecentTaskInfo> getRecentTasks(int maxNum, int flags,
            int userId) {
        final int callingUid = Binder.getCallingUid();
        userId = handleIncomingUser(Binder.getCallingPid(), callingUid, userId, "getRecentTasks");
        final boolean allowed = isGetTasksAllowed("getRecentTasks", Binder.getCallingPid(),
                callingUid);
        final boolean detailed = checkGetTasksPermission(
                android.Manifest.permission.GET_DETAILED_TASKS, Binder.getCallingPid(),
                UserHandle.getAppId(callingUid))
                == PackageManager.PERMISSION_GRANTED;

        synchronized (mGlobalLock) {
            return mRecentTasks.getRecentTasks(maxNum, flags, allowed, detailed, userId,
                    callingUid);
        }
    }

    // TODO(148895075): deprecate and replace with task equivalents
    @Override
    public List<ActivityManager.StackInfo> getAllStackInfos() {
        enforceCallerIsRecentsOrHasPermission(MANAGE_ACTIVITY_STACKS, "getAllStackInfos()");
        long ident = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                return mRootWindowContainer.getAllStackInfos(INVALID_DISPLAY);
            }
        } finally {
            Binder.restoreCallingIdentity(ident);
        }
    }

    @Override
    public ActivityManager.StackInfo getStackInfo(int windowingMode, int activityType) {
        enforceCallerIsRecentsOrHasPermission(MANAGE_ACTIVITY_STACKS, "getStackInfo()");
        long ident = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                return mRootWindowContainer.getStackInfo(windowingMode, activityType);
            }
        } finally {
            Binder.restoreCallingIdentity(ident);
        }
    }

    // TODO(148895075): deprecate and replace with task equivalents
    @Override
    public List<ActivityManager.StackInfo> getAllStackInfosOnDisplay(int displayId) {
        enforceCallerIsRecentsOrHasPermission(MANAGE_ACTIVITY_STACKS, "getAllStackInfos()");
        long ident = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                return mRootWindowContainer.getAllStackInfos(displayId);
            }
        } finally {
            Binder.restoreCallingIdentity(ident);
        }
    }

    @Override
    public ActivityManager.StackInfo getStackInfoOnDisplay(int windowingMode, int activityType,
            int displayId) {
        enforceCallerIsRecentsOrHasPermission(MANAGE_ACTIVITY_STACKS, "getStackInfo()");
        long ident = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                return mRootWindowContainer.getStackInfo(windowingMode, activityType, displayId);
            }
        } finally {
            Binder.restoreCallingIdentity(ident);
        }
    }

    @Override
    public void cancelRecentsAnimation(boolean restoreHomeStackPosition) {
        enforceCallerIsRecentsOrHasPermission(MANAGE_ACTIVITY_STACKS, "cancelRecentsAnimation()");
        final long callingUid = Binder.getCallingUid();
        final long origId = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                // Cancel the recents animation synchronously (do not hold the WM lock)
                mWindowManager.cancelRecentsAnimation(restoreHomeStackPosition
                        ? REORDER_MOVE_TO_ORIGINAL_POSITION
                        : REORDER_KEEP_IN_PLACE, "cancelRecentsAnimation/uid=" + callingUid);
            }
        } finally {
            Binder.restoreCallingIdentity(origId);
        }
    }

    @Override
    public void startLockTaskModeByToken(IBinder token) {
        synchronized (mGlobalLock) {
            final ActivityRecord r = ActivityRecord.forTokenLocked(token);
            if (r == null) {
                return;
            }
            startLockTaskModeLocked(r.getTask(), false /* isSystemCaller */);
        }
    }

    @Override
    public void startSystemLockTaskMode(int taskId) {
        mAmInternal.enforceCallingPermission(MANAGE_ACTIVITY_STACKS, "startSystemLockTaskMode");
        // This makes inner call to look as if it was initiated by system.
        long ident = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                final Task task = mRootWindowContainer.anyTaskForId(taskId,
                        MATCH_TASK_IN_STACKS_ONLY);
                if (task == null) {
                    return;
                }

                // When starting lock task mode the stack must be in front and focused
                task.getStack().moveToFront("startSystemLockTaskMode");
                startLockTaskModeLocked(task, true /* isSystemCaller */);
            }
        } finally {
            Binder.restoreCallingIdentity(ident);
        }
    }

    @Override
    public void stopLockTaskModeByToken(IBinder token) {
        synchronized (mGlobalLock) {
            final ActivityRecord r = ActivityRecord.forTokenLocked(token);
            if (r == null) {
                return;
            }
            stopLockTaskModeInternal(r.getTask(), false /* isSystemCaller */);
        }
    }

    /**
     * This API should be called by SystemUI only when user perform certain action to dismiss
     * lock task mode. We should only dismiss pinned lock task mode in this case.
     */
    @Override
    public void stopSystemLockTaskMode() throws RemoteException {
        mAmInternal.enforceCallingPermission(MANAGE_ACTIVITY_STACKS, "stopSystemLockTaskMode");
        stopLockTaskModeInternal(null, true /* isSystemCaller */);
    }

    private void startLockTaskModeLocked(@Nullable Task task, boolean isSystemCaller) {
        if (DEBUG_LOCKTASK) Slog.w(TAG_LOCKTASK, "startLockTaskModeLocked: " + task);
        if (task == null || task.mLockTaskAuth == LOCK_TASK_AUTH_DONT_LOCK) {
            return;
        }

        final ActivityStack stack = mRootWindowContainer.getTopDisplayFocusedStack();
        if (stack == null || task != stack.getTopMostTask()) {
            throw new IllegalArgumentException("Invalid task, not in foreground");
        }

        // {@code isSystemCaller} is used to distinguish whether this request is initiated by the
        // system or a specific app.
        // * System-initiated requests will only start the pinned mode (screen pinning)
        // * App-initiated requests
        //   - will put the device in fully locked mode (LockTask), if the app is whitelisted
        //   - will start the pinned mode, otherwise
        final int callingUid = Binder.getCallingUid();
        long ident = Binder.clearCallingIdentity();
        try {
            // When a task is locked, dismiss the pinned stack if it exists
            mRootWindowContainer.removeStacksInWindowingModes(WINDOWING_MODE_PINNED);

            getLockTaskController().startLockTaskMode(task, isSystemCaller, callingUid);
        } finally {
            Binder.restoreCallingIdentity(ident);
        }
    }

    private void stopLockTaskModeInternal(@Nullable Task task, boolean isSystemCaller) {
        final int callingUid = Binder.getCallingUid();
        long ident = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                getLockTaskController().stopLockTaskMode(task, isSystemCaller, callingUid);
            }
            // Launch in-call UI if a call is ongoing. This is necessary to allow stopping the lock
            // task and jumping straight into a call in the case of emergency call back.
            TelecomManager tm = (TelecomManager) mContext.getSystemService(Context.TELECOM_SERVICE);
            if (tm != null) {
                tm.showInCallScreen(false);
            }
        } finally {
            Binder.restoreCallingIdentity(ident);
        }
    }

    @Override
    public void updateLockTaskPackages(int userId, String[] packages) {
        final int callingUid = Binder.getCallingUid();
        if (callingUid != 0 && callingUid != SYSTEM_UID) {
            mAmInternal.enforceCallingPermission(Manifest.permission.UPDATE_LOCK_TASK_PACKAGES,
                    "updateLockTaskPackages()");
        }
        synchronized (mGlobalLock) {
            if (DEBUG_LOCKTASK) Slog.w(TAG_LOCKTASK, "Whitelisting " + userId + ":"
                    + Arrays.toString(packages));
            getLockTaskController().updateLockTaskPackages(userId, packages);
        }
    }

    @Override
    public boolean isInLockTaskMode() {
        return getLockTaskModeState() != LOCK_TASK_MODE_NONE;
    }

    @Override
    public int getLockTaskModeState() {
        synchronized (mGlobalLock) {
            return getLockTaskController().getLockTaskModeState();
        }
    }

    @Override
    public void setTaskDescription(IBinder token, ActivityManager.TaskDescription td) {
        synchronized (mGlobalLock) {
            ActivityRecord r = ActivityRecord.isInStackLocked(token);
            if (r != null) {
                r.setTaskDescription(td);
                final Task task = r.getTask();
                task.updateTaskDescription();
            }
        }
    }

    @Override
    public Bundle getActivityOptions(IBinder token) {
        final long origId = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                final ActivityRecord r = ActivityRecord.isInStackLocked(token);
                if (r != null) {
                    final ActivityOptions activityOptions = r.takeOptionsLocked(
                            true /* fromClient */);
                    return activityOptions == null ? null : activityOptions.toBundle();
                }
                return null;
            }
        } finally {
            Binder.restoreCallingIdentity(origId);
        }
    }

    @Override
    public List<IBinder> getAppTasks(String callingPackage) {
        int callingUid = Binder.getCallingUid();
        assertPackageMatchesCallingUid(callingPackage);
        long ident = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                return mRecentTasks.getAppTasksList(callingUid, callingPackage);
            }
        } finally {
            Binder.restoreCallingIdentity(ident);
        }
    }

    @Override
    public void finishVoiceTask(IVoiceInteractionSession session) {
        synchronized (mGlobalLock) {
            final long origId = Binder.clearCallingIdentity();
            try {
                // TODO: VI Consider treating local voice interactions and voice tasks
                // differently here
                mRootWindowContainer.finishVoiceTask(session);
            } finally {
                Binder.restoreCallingIdentity(origId);
            }
        }

    }

    @Override
    public boolean isTopOfTask(IBinder token) {
        synchronized (mGlobalLock) {
            ActivityRecord r = ActivityRecord.isInStackLocked(token);
            return r != null && r.getTask().getTopNonFinishingActivity() == r;
        }
    }

    @Override
    public void notifyLaunchTaskBehindComplete(IBinder token) {
        mStackSupervisor.scheduleLaunchTaskBehindComplete(token);
    }

    @Override
    public void notifyEnterAnimationComplete(IBinder token) {
        mH.post(() -> {
            synchronized (mGlobalLock) {
                ActivityRecord r = ActivityRecord.forTokenLocked(token);
                if (r != null && r.attachedToProcess()) {
                    try {
                        r.app.getThread().scheduleEnterAnimationComplete(r.appToken);
                    } catch (RemoteException e) {
                    }
                }
            }

        });
    }

    /** Called from an app when assist data is ready. */
    @Override
    public void reportAssistContextExtras(IBinder token, Bundle extras, AssistStructure structure,
            AssistContent content, Uri referrer) {
        PendingAssistExtras pae = (PendingAssistExtras) token;
        synchronized (pae) {
            pae.result = extras;
            pae.structure = structure;
            pae.content = content;
            if (referrer != null) {
                pae.extras.putParcelable(Intent.EXTRA_REFERRER, referrer);
            }
            if (structure != null) {
                // Pre-fill the task/activity component for all assist data receivers
                structure.setTaskId(pae.activity.getTask().mTaskId);
                structure.setActivityComponent(pae.activity.mActivityComponent);
                structure.setHomeActivity(pae.isHome);
            }
            pae.haveResult = true;
            pae.notifyAll();
            if (pae.intent == null && pae.receiver == null) {
                // Caller is just waiting for the result.
                return;
            }
        }
        // We are now ready to launch the assist activity.
        IAssistDataReceiver sendReceiver = null;
        Bundle sendBundle = null;
        synchronized (mGlobalLock) {
            buildAssistBundleLocked(pae, extras);
            boolean exists = mPendingAssistExtras.remove(pae);
            mUiHandler.removeCallbacks(pae);
            if (!exists) {
                // Timed out.
                return;
            }

            if ((sendReceiver = pae.receiver) != null) {
                // Caller wants result sent back to them.
                sendBundle = new Bundle();
                sendBundle.putInt(ActivityTaskManagerInternal.ASSIST_TASK_ID,
                        pae.activity.getTask().mTaskId);
                sendBundle.putBinder(ActivityTaskManagerInternal.ASSIST_ACTIVITY_ID,
                        pae.activity.assistToken);
                sendBundle.putBundle(ASSIST_KEY_DATA, pae.extras);
                sendBundle.putParcelable(ASSIST_KEY_STRUCTURE, pae.structure);
                sendBundle.putParcelable(ASSIST_KEY_CONTENT, pae.content);
                sendBundle.putBundle(ASSIST_KEY_RECEIVER_EXTRAS, pae.receiverExtras);
            }
        }
        if (sendReceiver != null) {
            try {
                sendReceiver.onHandleAssistData(sendBundle);
            } catch (RemoteException e) {
            }
            return;
        }

        final long ident = Binder.clearCallingIdentity();
        try {
            if (TextUtils.equals(pae.intent.getAction(),
                    android.service.voice.VoiceInteractionService.SERVICE_INTERFACE)) {
                // Start voice interaction through VoiceInteractionManagerService.
                mAssistUtils.showSessionForActiveService(sendBundle, SHOW_SOURCE_APPLICATION,
                        null, null);
            } else {
                pae.intent.replaceExtras(pae.extras);
                pae.intent.setFlags(FLAG_ACTIVITY_NEW_TASK
                        | Intent.FLAG_ACTIVITY_SINGLE_TOP
                        | Intent.FLAG_ACTIVITY_CLEAR_TOP);
                mInternal.closeSystemDialogs("assist");

                try {
                    mContext.startActivityAsUser(pae.intent, new UserHandle(pae.userHandle));
                } catch (ActivityNotFoundException e) {
                    Slog.w(TAG, "No activity to handle assist action.", e);
                }
            }
        } finally {
            Binder.restoreCallingIdentity(ident);
        }
    }

    @Override
    public int addAppTask(IBinder activityToken, Intent intent,
            ActivityManager.TaskDescription description, Bitmap thumbnail) throws RemoteException {
        final int callingUid = Binder.getCallingUid();
        final long callingIdent = Binder.clearCallingIdentity();

        try {
            synchronized (mGlobalLock) {
                ActivityRecord r = ActivityRecord.isInStackLocked(activityToken);
                if (r == null) {
                    throw new IllegalArgumentException("Activity does not exist; token="
                            + activityToken);
                }
                ComponentName comp = intent.getComponent();
                if (comp == null) {
                    throw new IllegalArgumentException("Intent " + intent
                            + " must specify explicit component");
                }
                if (thumbnail.getWidth() != mThumbnailWidth
                        || thumbnail.getHeight() != mThumbnailHeight) {
                    throw new IllegalArgumentException("Bad thumbnail size: got "
                            + thumbnail.getWidth() + "x" + thumbnail.getHeight() + ", require "
                            + mThumbnailWidth + "x" + mThumbnailHeight);
                }
                if (intent.getSelector() != null) {
                    intent.setSelector(null);
                }
                if (intent.getSourceBounds() != null) {
                    intent.setSourceBounds(null);
                }
                if ((intent.getFlags()&Intent.FLAG_ACTIVITY_NEW_DOCUMENT) != 0) {
                    if ((intent.getFlags()&Intent.FLAG_ACTIVITY_RETAIN_IN_RECENTS) == 0) {
                        // The caller has added this as an auto-remove task...  that makes no
                        // sense, so turn off auto-remove.
                        intent.addFlags(Intent.FLAG_ACTIVITY_RETAIN_IN_RECENTS);
                    }
                }
                final ActivityInfo ainfo = AppGlobals.getPackageManager().getActivityInfo(comp,
                        STOCK_PM_FLAGS, UserHandle.getUserId(callingUid));
                if (ainfo.applicationInfo.uid != callingUid) {
                    throw new SecurityException(
                            "Can't add task for another application: target uid="
                                    + ainfo.applicationInfo.uid + ", calling uid=" + callingUid);
                }

                final ActivityStack stack = r.getRootTask();
                final Task task = stack.getDisplay().createStack(stack.getWindowingMode(),
                        stack.getActivityType(), !ON_TOP, ainfo, intent);

                if (!mRecentTasks.addToBottom(task)) {
                    // The app has too many tasks already and we can't add any more
                    stack.removeChild(task, "addAppTask");
                    return INVALID_TASK_ID;
                }
                task.getTaskDescription().copyFrom(description);

                // TODO: Send the thumbnail to WM to store it.

                return task.mTaskId;
            }
        } finally {
            Binder.restoreCallingIdentity(callingIdent);
        }
    }

    @Override
    public Point getAppTaskThumbnailSize() {
        synchronized (mGlobalLock) {
            return new Point(mThumbnailWidth, mThumbnailHeight);
        }
    }

    @Override
    public void setTaskResizeable(int taskId, int resizeableMode) {
        synchronized (mGlobalLock) {
            final Task task = mRootWindowContainer.anyTaskForId(
                    taskId, MATCH_TASK_IN_STACKS_OR_RECENT_TASKS);
            if (task == null) {
                Slog.w(TAG, "setTaskResizeable: taskId=" + taskId + " not found");
                return;
            }
            task.setResizeMode(resizeableMode);
        }
    }

    @Override
    public void resizeTask(int taskId, Rect bounds, int resizeMode) {
        mAmInternal.enforceCallingPermission(MANAGE_ACTIVITY_STACKS, "resizeTask()");
        long ident = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                final Task task = mRootWindowContainer.anyTaskForId(taskId,
                        MATCH_TASK_IN_STACKS_ONLY);
                if (task == null) {
                    Slog.w(TAG, "resizeTask: taskId=" + taskId + " not found");
                    return;
                }
                // Place the task in the right stack if it isn't there already based on
                // the requested bounds.
                // The stack transition logic is:
                // - a null bounds on a freeform task moves that task to fullscreen
                // - a non-null bounds on a non-freeform (fullscreen OR docked) task moves
                //   that task to freeform
                // - otherwise the task is not moved
                ActivityStack stack = task.getStack();
                if (!task.getWindowConfiguration().canResizeTask()) {
                    throw new IllegalArgumentException("resizeTask not allowed on task=" + task);
                }
                if (bounds == null && stack.getWindowingMode() == WINDOWING_MODE_FREEFORM) {
                    stack = stack.getDisplay().getOrCreateStack(
                            WINDOWING_MODE_FULLSCREEN, stack.getActivityType(), ON_TOP);
                } else if (bounds != null && stack.getWindowingMode() != WINDOWING_MODE_FREEFORM) {
                    stack = stack.getDisplay().getOrCreateStack(
                            WINDOWING_MODE_FREEFORM, stack.getActivityType(), ON_TOP);
                }

                // Reparent the task to the right stack if necessary
                boolean preserveWindow = (resizeMode & RESIZE_MODE_PRESERVE_WINDOW) != 0;
                if (stack != task.getStack()) {
                    // Defer resume until the task is resized below
                    task.reparent(stack, ON_TOP, REPARENT_KEEP_STACK_AT_FRONT, ANIMATE,
                            DEFER_RESUME, "resizeTask");
                    preserveWindow = false;
                }

                // After reparenting (which only resizes the task to the stack bounds), resize the
                // task to the actual bounds provided
                task.resize(bounds, resizeMode, preserveWindow, !DEFER_RESUME);
            }
        } finally {
            Binder.restoreCallingIdentity(ident);
        }
    }

    @Override
    public boolean releaseActivityInstance(IBinder token) {
        synchronized (mGlobalLock) {
            final long origId = Binder.clearCallingIdentity();
            try {
                final ActivityRecord r = ActivityRecord.isInStackLocked(token);
                if (r == null || !r.isDestroyable()) {
                    return false;
                }
                r.destroyImmediately(true /* removeFromApp */, "app-req");
                return r.isState(DESTROYING, DESTROYED);
            } finally {
                Binder.restoreCallingIdentity(origId);
            }
        }
    }

    @Override
    public void releaseSomeActivities(IApplicationThread appInt) {
        synchronized (mGlobalLock) {
            final long origId = Binder.clearCallingIdentity();
            try {
                final WindowProcessController app = getProcessController(appInt);
                app.releaseSomeActivities("low-mem");
            } finally {
                Binder.restoreCallingIdentity(origId);
            }
        }
    }

    @Override
    public void setLockScreenShown(boolean keyguardShowing, boolean aodShowing) {
        if (checkCallingPermission(android.Manifest.permission.DEVICE_POWER)
                != PackageManager.PERMISSION_GRANTED) {
            throw new SecurityException("Requires permission "
                    + android.Manifest.permission.DEVICE_POWER);
        }

        synchronized (mGlobalLock) {
            long ident = Binder.clearCallingIdentity();
            if (mKeyguardShown != keyguardShowing) {
                mKeyguardShown = keyguardShowing;
                final Message msg = PooledLambda.obtainMessage(
                        ActivityManagerInternal::reportCurKeyguardUsageEvent, mAmInternal,
                        keyguardShowing);
                mH.sendMessage(msg);
            }
            try {
                mKeyguardController.setKeyguardShown(keyguardShowing, aodShowing);
            } finally {
                Binder.restoreCallingIdentity(ident);
            }
        }

        mH.post(() -> {
            for (int i = mScreenObservers.size() - 1; i >= 0; i--) {
                mScreenObservers.get(i).onKeyguardStateChanged(keyguardShowing);
            }
        });
    }

    public void onScreenAwakeChanged(boolean isAwake) {
        mH.post(() -> {
            for (int i = mScreenObservers.size() - 1; i >= 0; i--) {
                mScreenObservers.get(i).onAwakeStateChanged(isAwake);
            }
        });
    }

    @Override
    public Bitmap getTaskDescriptionIcon(String filePath, int userId) {
        userId = handleIncomingUser(Binder.getCallingPid(), Binder.getCallingUid(),
                userId, "getTaskDescriptionIcon");

        final File passedIconFile = new File(filePath);
        final File legitIconFile = new File(TaskPersister.getUserImagesDir(userId),
                passedIconFile.getName());
        if (!legitIconFile.getPath().equals(filePath)
                || !filePath.contains(ActivityRecord.ACTIVITY_ICON_SUFFIX)) {
            throw new IllegalArgumentException("Bad file path: " + filePath
                    + " passed for userId " + userId);
        }
        return mRecentTasks.getTaskDescriptionIcon(filePath);
    }

    @Override
    public void removeStack(int stackId) {
        enforceCallerIsRecentsOrHasPermission(MANAGE_ACTIVITY_STACKS, "removeStack()");
        synchronized (mGlobalLock) {
            final long ident = Binder.clearCallingIdentity();
            try {
                final ActivityStack stack = mRootWindowContainer.getStack(stackId);
                if (stack == null) {
                    Slog.w(TAG, "removeStack: No stack with id=" + stackId);
                    return;
                }
                if (!stack.isActivityTypeStandardOrUndefined()) {
                    throw new IllegalArgumentException(
                            "Removing non-standard stack is not allowed.");
                }
                mStackSupervisor.removeStack(stack);
            } finally {
                Binder.restoreCallingIdentity(ident);
            }
        }
    }

    @Override
    public void moveStackToDisplay(int stackId, int displayId) {
        mAmInternal.enforceCallingPermission(INTERNAL_SYSTEM_WINDOW, "moveStackToDisplay()");

        synchronized (mGlobalLock) {
            final long ident = Binder.clearCallingIdentity();
            try {
                if (DEBUG_STACK) Slog.d(TAG_STACK, "moveStackToDisplay: moving stackId=" + stackId
                        + " to displayId=" + displayId);
                mRootWindowContainer.moveStackToDisplay(stackId, displayId, ON_TOP);
            } finally {
                Binder.restoreCallingIdentity(ident);
            }
        }
    }

    @Override
    public void toggleFreeformWindowingMode(IBinder token) {
        synchronized (mGlobalLock) {
            long ident = Binder.clearCallingIdentity();
            try {
                final ActivityRecord r = ActivityRecord.forTokenLocked(token);
                if (r == null) {
                    throw new IllegalArgumentException(
                            "toggleFreeformWindowingMode: No activity record matching token="
                                    + token);
                }

                final ActivityStack stack = r.getRootTask();
                if (stack == null) {
                    throw new IllegalStateException("toggleFreeformWindowingMode: the activity "
                            + "doesn't have a stack");
                }

                if (!stack.inFreeformWindowingMode()
                        && stack.getWindowingMode() != WINDOWING_MODE_FULLSCREEN) {
                    throw new IllegalStateException("toggleFreeformWindowingMode: You can only "
                            + "toggle between fullscreen and freeform.");
                }

                if (stack.inFreeformWindowingMode()) {
                    stack.setWindowingMode(WINDOWING_MODE_FULLSCREEN);
                } else if (!mSizeCompatFreeform && r.inSizeCompatMode()) {
                    throw new IllegalStateException("Size-compat windows are currently not"
                            + "freeform-enabled");
                } else if (stack.getParent().inFreeformWindowingMode()) {
                    // If the window is on a freeform display, set it to undefined. It will be
                    // resolved to freeform and it can adjust windowing mode when the display mode
                    // changes in runtime.
                    stack.setWindowingMode(WINDOWING_MODE_UNDEFINED);
                } else {
                    stack.setWindowingMode(WINDOWING_MODE_FREEFORM);
                }
            } finally {
                Binder.restoreCallingIdentity(ident);
            }
        }
    }

    /** Sets the task stack listener that gets callbacks when a task stack changes. */
    @Override
    public void registerTaskStackListener(ITaskStackListener listener) {
        enforceCallerIsRecentsOrHasPermission(MANAGE_ACTIVITY_STACKS,
                "registerTaskStackListener()");
        mTaskChangeNotificationController.registerTaskStackListener(listener);
    }

    /** Unregister a task stack listener so that it stops receiving callbacks. */
    @Override
    public void unregisterTaskStackListener(ITaskStackListener listener) {
        enforceCallerIsRecentsOrHasPermission(MANAGE_ACTIVITY_STACKS,
                "unregisterTaskStackListener()");
        mTaskChangeNotificationController.unregisterTaskStackListener(listener);
    }

    @Override
    public boolean requestAssistContextExtras(int requestType, IAssistDataReceiver receiver,
            Bundle receiverExtras, IBinder activityToken, boolean focused, boolean newSessionId) {
        return enqueueAssistContext(requestType, null, null, receiver, receiverExtras,
                activityToken, focused, newSessionId, UserHandle.getCallingUserId(), null,
                PENDING_ASSIST_EXTRAS_LONG_TIMEOUT, 0) != null;
    }

    @Override
    public boolean requestAutofillData(IAssistDataReceiver receiver, Bundle receiverExtras,
            IBinder activityToken, int flags) {
        return enqueueAssistContext(ActivityManager.ASSIST_CONTEXT_AUTOFILL, null, null,
                receiver, receiverExtras, activityToken, true, true, UserHandle.getCallingUserId(),
                null, PENDING_AUTOFILL_ASSIST_STRUCTURE_TIMEOUT, flags) != null;
    }

    @Override
    public boolean launchAssistIntent(Intent intent, int requestType, String hint, int userHandle,
            Bundle args) {
        return enqueueAssistContext(requestType, intent, hint, null, null, null,
                true /* focused */, true /* newSessionId */, userHandle, args,
                PENDING_ASSIST_EXTRAS_TIMEOUT, 0) != null;
    }

    @Override
    public Bundle getAssistContextExtras(int requestType) {
        PendingAssistExtras pae = enqueueAssistContext(requestType, null, null, null,
                null, null, true /* focused */, true /* newSessionId */,
                UserHandle.getCallingUserId(), null, PENDING_ASSIST_EXTRAS_TIMEOUT, 0);
        if (pae == null) {
            return null;
        }
        synchronized (pae) {
            while (!pae.haveResult) {
                try {
                    pae.wait();
                } catch (InterruptedException e) {
                }
            }
        }
        synchronized (mGlobalLock) {
            buildAssistBundleLocked(pae, pae.result);
            mPendingAssistExtras.remove(pae);
            mUiHandler.removeCallbacks(pae);
        }
        return pae.extras;
    }

    /**
     * Binder IPC calls go through the public entry point.
     * This can be called with or without the global lock held.
     */
    private static int checkCallingPermission(String permission) {
        return checkPermission(
                permission, Binder.getCallingPid(), UserHandle.getAppId(Binder.getCallingUid()));
    }

    /** This can be called with or without the global lock held. */
    private void enforceCallerIsRecentsOrHasPermission(String permission, String func) {
        if (!getRecentTasks().isCallerRecents(Binder.getCallingUid())) {
            mAmInternal.enforceCallingPermission(permission, func);
        }
    }

    @VisibleForTesting
    int checkGetTasksPermission(String permission, int pid, int uid) {
        return checkPermission(permission, pid, uid);
    }

    static int checkPermission(String permission, int pid, int uid) {
        if (permission == null) {
            return PackageManager.PERMISSION_DENIED;
        }
        return checkComponentPermission(permission, pid, uid, -1, true);
    }

    public static int checkComponentPermission(String permission, int pid, int uid,
            int owningUid, boolean exported) {
        return ActivityManagerService.checkComponentPermission(
                permission, pid, uid, owningUid, exported);
    }

    boolean isGetTasksAllowed(String caller, int callingPid, int callingUid) {
        if (getRecentTasks().isCallerRecents(callingUid)) {
            // Always allow the recents component to get tasks
            return true;
        }

        boolean allowed = checkGetTasksPermission(android.Manifest.permission.REAL_GET_TASKS,
                callingPid, callingUid) == PackageManager.PERMISSION_GRANTED;
        if (!allowed) {
            if (checkGetTasksPermission(android.Manifest.permission.GET_TASKS,
                    callingPid, callingUid) == PackageManager.PERMISSION_GRANTED) {
                // Temporary compatibility: some existing apps on the system image may
                // still be requesting the old permission and not switched to the new
                // one; if so, we'll still allow them full access.  This means we need
                // to see if they are holding the old permission and are a system app.
                try {
                    if (AppGlobals.getPackageManager().isUidPrivileged(callingUid)) {
                        allowed = true;
                        if (DEBUG_TASKS) Slog.w(TAG, caller + ": caller " + callingUid
                                + " is using old GET_TASKS but privileged; allowing");
                    }
                } catch (RemoteException e) {
                }
            }
            if (DEBUG_TASKS) Slog.w(TAG, caller + ": caller " + callingUid
                    + " does not hold REAL_GET_TASKS; limiting output");
        }
        return allowed;
    }

    boolean isCrossUserAllowed(int pid, int uid) {
        return checkPermission(INTERACT_ACROSS_USERS, pid, uid) == PERMISSION_GRANTED
                || checkPermission(INTERACT_ACROSS_USERS_FULL, pid, uid) == PERMISSION_GRANTED;
    }

    private PendingAssistExtras enqueueAssistContext(int requestType, Intent intent, String hint,
            IAssistDataReceiver receiver, Bundle receiverExtras, IBinder activityToken,
            boolean focused, boolean newSessionId, int userHandle, Bundle args, long timeout,
            int flags) {
        mAmInternal.enforceCallingPermission(android.Manifest.permission.GET_TOP_ACTIVITY_INFO,
                "enqueueAssistContext()");

        synchronized (mGlobalLock) {
            ActivityRecord activity = getTopDisplayFocusedStack().getTopNonFinishingActivity();
            if (activity == null) {
                Slog.w(TAG, "getAssistContextExtras failed: no top activity");
                return null;
            }
            if (!activity.attachedToProcess()) {
                Slog.w(TAG, "getAssistContextExtras failed: no process for " + activity);
                return null;
            }
            if (focused) {
                if (activityToken != null) {
                    ActivityRecord caller = ActivityRecord.forTokenLocked(activityToken);
                    if (activity != caller) {
                        Slog.w(TAG, "enqueueAssistContext failed: caller " + caller
                                + " is not current top " + activity);
                        return null;
                    }
                }
            } else {
                activity = ActivityRecord.forTokenLocked(activityToken);
                if (activity == null) {
                    Slog.w(TAG, "enqueueAssistContext failed: activity for token=" + activityToken
                            + " couldn't be found");
                    return null;
                }
                if (!activity.attachedToProcess()) {
                    Slog.w(TAG, "enqueueAssistContext failed: no process for " + activity);
                    return null;
                }
            }

            PendingAssistExtras pae;
            Bundle extras = new Bundle();
            if (args != null) {
                extras.putAll(args);
            }
            extras.putString(Intent.EXTRA_ASSIST_PACKAGE, activity.packageName);
            extras.putInt(Intent.EXTRA_ASSIST_UID, activity.app.mUid);

            pae = new PendingAssistExtras(activity, extras, intent, hint, receiver, receiverExtras,
                    userHandle);
            pae.isHome = activity.isActivityTypeHome();

            // Increment the sessionId if necessary
            if (newSessionId) {
                mViSessionId++;
            }
            try {
                activity.app.getThread().requestAssistContextExtras(activity.appToken, pae,
                        requestType, mViSessionId, flags);
                mPendingAssistExtras.add(pae);
                mUiHandler.postDelayed(pae, timeout);
            } catch (RemoteException e) {
                Slog.w(TAG, "getAssistContextExtras failed: crash calling " + activity);
                return null;
            }
            return pae;
        }
    }

    private void buildAssistBundleLocked(PendingAssistExtras pae, Bundle result) {
        if (result != null) {
            pae.extras.putBundle(Intent.EXTRA_ASSIST_CONTEXT, result);
        }
        if (pae.hint != null) {
            pae.extras.putBoolean(pae.hint, true);
        }
    }

    private void pendingAssistExtrasTimedOut(PendingAssistExtras pae) {
        IAssistDataReceiver receiver;
        synchronized (mGlobalLock) {
            mPendingAssistExtras.remove(pae);
            receiver = pae.receiver;
        }
        if (receiver != null) {
            // Caller wants result sent back to them.
            Bundle sendBundle = new Bundle();
            // At least return the receiver extras
            sendBundle.putBundle(ASSIST_KEY_RECEIVER_EXTRAS, pae.receiverExtras);
            try {
                pae.receiver.onHandleAssistData(sendBundle);
            } catch (RemoteException e) {
            }
        }
    }

    public class PendingAssistExtras extends Binder implements Runnable {
        public final ActivityRecord activity;
        public boolean isHome;
        public final Bundle extras;
        public final Intent intent;
        public final String hint;
        public final IAssistDataReceiver receiver;
        public final int userHandle;
        public boolean haveResult = false;
        public Bundle result = null;
        public AssistStructure structure = null;
        public AssistContent content = null;
        public Bundle receiverExtras;

        public PendingAssistExtras(ActivityRecord _activity, Bundle _extras, Intent _intent,
                String _hint, IAssistDataReceiver _receiver, Bundle _receiverExtras,
                int _userHandle) {
            activity = _activity;
            extras = _extras;
            intent = _intent;
            hint = _hint;
            receiver = _receiver;
            receiverExtras = _receiverExtras;
            userHandle = _userHandle;
        }

        @Override
        public void run() {
            Slog.w(TAG, "getAssistContextExtras failed: timeout retrieving from " + activity);
            synchronized (this) {
                haveResult = true;
                notifyAll();
            }
            pendingAssistExtrasTimedOut(this);
        }
    }

    @Override
    public boolean isAssistDataAllowedOnCurrentActivity() {
        int userId;
        synchronized (mGlobalLock) {
            final ActivityStack focusedStack = getTopDisplayFocusedStack();
            if (focusedStack == null || focusedStack.isActivityTypeAssistant()) {
                return false;
            }

            final ActivityRecord activity = focusedStack.getTopNonFinishingActivity();
            if (activity == null) {
                return false;
            }
            userId = activity.mUserId;
        }
        return !DevicePolicyCache.getInstance().getScreenCaptureDisabled(userId);
    }

    @Override
    public boolean showAssistFromActivity(IBinder token, Bundle args) {
        long ident = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                ActivityRecord caller = ActivityRecord.forTokenLocked(token);
                ActivityRecord top = getTopDisplayFocusedStack().getTopNonFinishingActivity();
                if (top != caller) {
                    Slog.w(TAG, "showAssistFromActivity failed: caller " + caller
                            + " is not current top " + top);
                    return false;
                }
                if (!top.nowVisible) {
                    Slog.w(TAG, "showAssistFromActivity failed: caller " + caller
                            + " is not visible");
                    return false;
                }
            }
            return mAssistUtils.showSessionForActiveService(args, SHOW_SOURCE_APPLICATION, null,
                    token);
        } finally {
            Binder.restoreCallingIdentity(ident);
        }
    }

    @Override
    public boolean isRootVoiceInteraction(IBinder token) {
        synchronized (mGlobalLock) {
            ActivityRecord r = ActivityRecord.isInStackLocked(token);
            if (r == null) {
                return false;
            }
            return r.rootVoiceInteraction;
        }
    }

    private void onLocalVoiceInteractionStartedLocked(IBinder activity,
            IVoiceInteractionSession voiceSession, IVoiceInteractor voiceInteractor) {
        ActivityRecord activityToCallback = ActivityRecord.forTokenLocked(activity);
        if (activityToCallback == null) return;
        activityToCallback.setVoiceSessionLocked(voiceSession);

        // Inform the activity
        try {
            activityToCallback.app.getThread().scheduleLocalVoiceInteractionStarted(activity,
                    voiceInteractor);
            long token = Binder.clearCallingIdentity();
            try {
                startRunningVoiceLocked(voiceSession, activityToCallback.info.applicationInfo.uid);
            } finally {
                Binder.restoreCallingIdentity(token);
            }
            // TODO: VI Should we cache the activity so that it's easier to find later
            // rather than scan through all the stacks and activities?
        } catch (RemoteException re) {
            activityToCallback.clearVoiceSessionLocked();
            // TODO: VI Should this terminate the voice session?
        }
    }

    private void startRunningVoiceLocked(IVoiceInteractionSession session, int targetUid) {
        Slog.d(TAG, "<<<  startRunningVoiceLocked()");
        mVoiceWakeLock.setWorkSource(new WorkSource(targetUid));
        if (mRunningVoice == null || mRunningVoice.asBinder() != session.asBinder()) {
            boolean wasRunningVoice = mRunningVoice != null;
            mRunningVoice = session;
            if (!wasRunningVoice) {
                mVoiceWakeLock.acquire();
                updateSleepIfNeededLocked();
            }
        }
    }

    void finishRunningVoiceLocked() {
        if (mRunningVoice != null) {
            mRunningVoice = null;
            mVoiceWakeLock.release();
            updateSleepIfNeededLocked();
        }
    }

    @Override
    public void setVoiceKeepAwake(IVoiceInteractionSession session, boolean keepAwake) {
        synchronized (mGlobalLock) {
            if (mRunningVoice != null && mRunningVoice.asBinder() == session.asBinder()) {
                if (keepAwake) {
                    mVoiceWakeLock.acquire();
                } else {
                    mVoiceWakeLock.release();
                }
            }
        }
    }

    @Override
    public ComponentName getActivityClassForToken(IBinder token) {
        synchronized (mGlobalLock) {
            ActivityRecord r = ActivityRecord.isInStackLocked(token);
            if (r == null) {
                return null;
            }
            return r.intent.getComponent();
        }
    }

    @Override
    public String getPackageForToken(IBinder token) {
        synchronized (mGlobalLock) {
            ActivityRecord r = ActivityRecord.isInStackLocked(token);
            if (r == null) {
                return null;
            }
            return r.packageName;
        }
    }

    @Override
    public void showLockTaskEscapeMessage(IBinder token) {
        synchronized (mGlobalLock) {
            final ActivityRecord r = ActivityRecord.forTokenLocked(token);
            if (r == null) {
                return;
            }
            getLockTaskController().showLockTaskToast();
        }
    }

    @Override
    public void keyguardGoingAway(int flags) {
        enforceNotIsolatedCaller("keyguardGoingAway");
        final long token = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                mKeyguardController.keyguardGoingAway(flags);
            }
        } finally {
            Binder.restoreCallingIdentity(token);
        }
    }

    /**
     * Try to place task to provided position. The final position might be different depending on
     * current user and stacks state. The task will be moved to target stack if it's currently in
     * different stack.
     */
    @Override
    public void positionTaskInStack(int taskId, int stackId, int position) {
        mAmInternal.enforceCallingPermission(MANAGE_ACTIVITY_STACKS, "positionTaskInStack()");
        synchronized (mGlobalLock) {
            long ident = Binder.clearCallingIdentity();
            try {
                if (DEBUG_STACK) Slog.d(TAG_STACK, "positionTaskInStack: positioning task="
                        + taskId + " in stackId=" + stackId + " at position=" + position);
                final Task task = mRootWindowContainer.anyTaskForId(taskId);
                if (task == null) {
                    throw new IllegalArgumentException("positionTaskInStack: no task for id="
                            + taskId);
                }

                final ActivityStack stack = mRootWindowContainer.getStack(stackId);

                if (stack == null) {
                    throw new IllegalArgumentException("positionTaskInStack: no stack for id="
                            + stackId);
                }
                if (!stack.isActivityTypeStandardOrUndefined()) {
                    throw new IllegalArgumentException("positionTaskInStack: Attempt to change"
                            + " the position of task " + taskId + " in/to non-standard stack");
                }

                // TODO: Have the callers of this API call a separate reparent method if that is
                // what they intended to do vs. having this method also do reparenting.
                if (task.getStack() == stack) {
                    // Change position in current stack.
                    stack.positionChildAt(task, position);
                } else {
                    // Reparent to new stack.
                    task.reparent(stack, position, REPARENT_LEAVE_STACK_IN_PLACE, !ANIMATE,
                            !DEFER_RESUME, "positionTaskInStack");
                }
            } finally {
                Binder.restoreCallingIdentity(ident);
            }
        }
    }

    @Override
    public void reportSizeConfigurations(IBinder token, int[] horizontalSizeConfiguration,
            int[] verticalSizeConfigurations, int[] smallestSizeConfigurations) {
        if (DEBUG_CONFIGURATION) Slog.v(TAG, "Report configuration: " + token + " "
                + Arrays.toString(horizontalSizeConfiguration) + " "
                + Arrays.toString(verticalSizeConfigurations));
        synchronized (mGlobalLock) {
            ActivityRecord record = ActivityRecord.isInStackLocked(token);
            if (record == null) {
                throw new IllegalArgumentException("reportSizeConfigurations: ActivityRecord not "
                        + "found for: " + token);
            }
            record.setSizeConfigurations(horizontalSizeConfiguration,
                    verticalSizeConfigurations, smallestSizeConfigurations);
        }
    }

    /**
     * Dismisses Pip
     * @param animate True if the dismissal should be animated.
     * @param animationDuration The duration of the resize animation in milliseconds or -1 if the
     *                          default animation duration should be used.
     */
    @Override
    public void dismissPip(boolean animate, int animationDuration) {
        enforceCallerIsRecentsOrHasPermission(MANAGE_ACTIVITY_STACKS, "dismissPip()");
        final long ident = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                final ActivityStack stack =
                        mRootWindowContainer.getDefaultDisplay().getRootPinnedTask();
                if (stack == null) {
                    Slog.w(TAG, "dismissPip: pinned stack not found.");
                    return;
                }
                if (stack.getWindowingMode() != WINDOWING_MODE_PINNED) {
                    throw new IllegalArgumentException("Stack: " + stack
                            + " doesn't support animated resize.");
                }
                stack.dismissPip();
            }
        } finally {
            Binder.restoreCallingIdentity(ident);
        }
    }

    @Override
    public void suppressResizeConfigChanges(boolean suppress) throws RemoteException {
        mAmInternal.enforceCallingPermission(MANAGE_ACTIVITY_STACKS, "suppressResizeConfigChanges()");
        synchronized (mGlobalLock) {
            mSuppressResizeConfigChanges = suppress;
        }
    }

    @Override
    // TODO: API should just be about changing windowing modes...
    public void moveTasksToFullscreenStack(int fromStackId, boolean onTop) {
        enforceCallerIsRecentsOrHasPermission(MANAGE_ACTIVITY_STACKS,
                "moveTasksToFullscreenStack()");
        synchronized (mGlobalLock) {
            final long origId = Binder.clearCallingIdentity();
            try {
                final ActivityStack stack = mRootWindowContainer.getStack(fromStackId);
                if (stack != null){
                    if (!stack.isActivityTypeStandardOrUndefined()) {
                        throw new IllegalArgumentException(
                                "You can't move tasks from non-standard stacks.");
                    }
                    mStackSupervisor.moveTasksToFullscreenStackLocked(stack, onTop);
                }
            } finally {
                Binder.restoreCallingIdentity(origId);
            }
        }
    }

    /**
     * Moves the top activity in the input stackId to the pinned stack.
     *
     * @param stackId Id of stack to move the top activity to pinned stack.
     * @param bounds Bounds to use for pinned stack.
     *
     * @return True if the top activity of the input stack was successfully moved to the pinned
     *          stack.
     */
    @Override
    public boolean moveTopActivityToPinnedStack(int stackId, Rect bounds) {
        enforceCallerIsRecentsOrHasPermission(MANAGE_ACTIVITY_STACKS,
                "moveTopActivityToPinnedStack()");
        synchronized (mGlobalLock) {
            if (!mSupportsPictureInPicture) {
                throw new IllegalStateException("moveTopActivityToPinnedStack:"
                        + "Device doesn't support picture-in-picture mode");
            }

            long ident = Binder.clearCallingIdentity();
            try {
                return mRootWindowContainer.moveTopStackActivityToPinnedStack(stackId);
            } finally {
                Binder.restoreCallingIdentity(ident);
            }
        }
    }

    @Override
    public boolean isInMultiWindowMode(IBinder token) {
        final long origId = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                final ActivityRecord r = ActivityRecord.isInStackLocked(token);
                if (r == null) {
                    return false;
                }
                // An activity is consider to be in multi-window mode if its task isn't fullscreen.
                return r.inMultiWindowMode();
            }
        } finally {
            Binder.restoreCallingIdentity(origId);
        }
    }

    @Override
    public boolean isInPictureInPictureMode(IBinder token) {
        final long origId = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                return isInPictureInPictureMode(ActivityRecord.forTokenLocked(token));
            }
        } finally {
            Binder.restoreCallingIdentity(origId);
        }
    }

    private boolean isInPictureInPictureMode(ActivityRecord r) {
        return r != null
                && r.getRootTask() != null
                && r.inPinnedWindowingMode()
                && r.getRootTask().isInStackLocked(r) != null;
    }

    @Override
    public boolean enterPictureInPictureMode(IBinder token, final PictureInPictureParams params) {
        final long origId = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                final ActivityRecord r = ensureValidPictureInPictureActivityParamsLocked(
                        "enterPictureInPictureMode", token, params);

                // If the activity is already in picture in picture mode, then just return early
                if (isInPictureInPictureMode(r)) {
                    return true;
                }

                // Activity supports picture-in-picture, now check that we can enter PiP at this
                // point, if it is
                if (!r.checkEnterPictureInPictureState("enterPictureInPictureMode",
                        false /* beforeStopping */)) {
                    return false;
                }

                final Runnable enterPipRunnable = () -> {
                    synchronized (mGlobalLock) {
                        if (r.getParent() == null) {
                            Slog.e(TAG, "Skip enterPictureInPictureMode, destroyed " + r);
                            return;
                        }
                        // Only update the saved args from the args that are set
                        r.setPictureInPictureParams(params);
                        final float aspectRatio = r.pictureInPictureArgs.getAspectRatio();
                        final List<RemoteAction> actions = r.pictureInPictureArgs.getActions();
                        // Adjust the source bounds by the insets for the transition down
                        final Rect sourceBounds = new Rect(
                                r.pictureInPictureArgs.getSourceRectHint());
                        mRootWindowContainer.moveActivityToPinnedStack(
                                r, sourceBounds, aspectRatio, "enterPictureInPictureMode");
                        final ActivityStack stack = r.getRootTask();
                        stack.setPictureInPictureAspectRatio(aspectRatio);
                        stack.setPictureInPictureActions(actions);
                        MetricsLoggerWrapper.logPictureInPictureEnter(mContext,
                                r.info.applicationInfo.uid, r.shortComponentName,
                                r.supportsEnterPipOnTaskSwitch);
                        logPictureInPictureArgs(params);
                    }
                };

                if (isKeyguardLocked()) {
                    // If the keyguard is showing or occluded, then try and dismiss it before
                    // entering picture-in-picture (this will prompt the user to authenticate if the
                    // device is currently locked).
                    dismissKeyguard(token, new KeyguardDismissCallback() {
                        @Override
                        public void onDismissSucceeded() {
                            mH.post(enterPipRunnable);
                        }
                    }, null /* message */);
                } else {
                    // Enter picture in picture immediately otherwise
                    enterPipRunnable.run();
                }
                return true;
            }
        } finally {
            Binder.restoreCallingIdentity(origId);
        }
    }

    @Override
    public void setPictureInPictureParams(IBinder token, final PictureInPictureParams params) {
        final long origId = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                final ActivityRecord r = ensureValidPictureInPictureActivityParamsLocked(
                        "setPictureInPictureParams", token, params);

                // Only update the saved args from the args that are set
                r.setPictureInPictureParams(params);
                if (r.inPinnedWindowingMode()) {
                    // If the activity is already in picture-in-picture, update the pinned stack now
                    // if it is not already expanding to fullscreen. Otherwise, the arguments will
                    // be used the next time the activity enters PiP
                    final ActivityStack stack = r.getRootTask();
                    stack.setPictureInPictureAspectRatio(
                            r.pictureInPictureArgs.getAspectRatio());
                    stack.setPictureInPictureActions(r.pictureInPictureArgs.getActions());
                }
                logPictureInPictureArgs(params);
            }
        } finally {
            Binder.restoreCallingIdentity(origId);
        }
    }

    @Override
    public int getMaxNumPictureInPictureActions(IBinder token) {
        // Currently, this is a static constant, but later, we may change this to be dependent on
        // the context of the activity
        return 3;
    }

    private void logPictureInPictureArgs(PictureInPictureParams params) {
        if (params.hasSetActions()) {
            MetricsLogger.histogram(mContext, "tron_varz_picture_in_picture_actions_count",
                    params.getActions().size());
        }
        if (params.hasSetAspectRatio()) {
            LogMaker lm = new LogMaker(MetricsEvent.ACTION_PICTURE_IN_PICTURE_ASPECT_RATIO_CHANGED);
            lm.addTaggedData(MetricsEvent.PICTURE_IN_PICTURE_ASPECT_RATIO, params.getAspectRatio());
            MetricsLogger.action(lm);
        }
    }

    /**
     * Checks the state of the system and the activity associated with the given {@param token} to
     * verify that picture-in-picture is supported for that activity.
     *
     * @return the activity record for the given {@param token} if all the checks pass.
     */
    private ActivityRecord ensureValidPictureInPictureActivityParamsLocked(String caller,
            IBinder token, PictureInPictureParams params) {
        if (!mSupportsPictureInPicture) {
            throw new IllegalStateException(caller
                    + ": Device doesn't support picture-in-picture mode.");
        }

        final ActivityRecord r = ActivityRecord.forTokenLocked(token);
        if (r == null) {
            throw new IllegalStateException(caller
                    + ": Can't find activity for token=" + token);
        }

        if (!r.supportsPictureInPicture()) {
            throw new IllegalStateException(caller
                    + ": Current activity does not support picture-in-picture.");
        }

        if (params.hasSetAspectRatio()
                && !mWindowManager.isValidPictureInPictureAspectRatio(
                        r.getDisplay(), params.getAspectRatio())) {
            final float minAspectRatio = mContext.getResources().getFloat(
                    com.android.internal.R.dimen.config_pictureInPictureMinAspectRatio);
            final float maxAspectRatio = mContext.getResources().getFloat(
                    com.android.internal.R.dimen.config_pictureInPictureMaxAspectRatio);
            throw new IllegalArgumentException(String.format(caller
                            + ": Aspect ratio is too extreme (must be between %f and %f).",
                    minAspectRatio, maxAspectRatio));
        }

        // Truncate the number of actions if necessary
        params.truncateActions(getMaxNumPictureInPictureActions(token));

        return r;
    }

    @Override
    public IBinder getUriPermissionOwnerForActivity(IBinder activityToken) {
        enforceNotIsolatedCaller("getUriPermissionOwnerForActivity");
        synchronized (mGlobalLock) {
            ActivityRecord r = ActivityRecord.isInStackLocked(activityToken);
            if (r == null) {
                throw new IllegalArgumentException("Activity does not exist; token="
                        + activityToken);
            }
            return r.getUriPermissionsLocked().getExternalToken();
        }
    }

    @Override
    public void resizeDockedStack(Rect dockedBounds, Rect tempDockedTaskBounds,
            Rect tempDockedTaskInsetBounds,
            Rect tempOtherTaskBounds, Rect tempOtherTaskInsetBounds) {
        enforceCallerIsRecentsOrHasPermission(MANAGE_ACTIVITY_STACKS, "resizeDockedStack()");
        long ident = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                mStackSupervisor.resizeDockedStackLocked(dockedBounds, tempDockedTaskBounds,
                        tempDockedTaskInsetBounds, tempOtherTaskBounds, tempOtherTaskInsetBounds,
                        PRESERVE_WINDOWS);
            }
        } finally {
            Binder.restoreCallingIdentity(ident);
        }
    }

    @Override
    public void setSplitScreenResizing(boolean resizing) {
        enforceCallerIsRecentsOrHasPermission(MANAGE_ACTIVITY_STACKS, "setSplitScreenResizing()");
        final long ident = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                mStackSupervisor.setSplitScreenResizing(resizing);
            }
        } finally {
            Binder.restoreCallingIdentity(ident);
        }
    }

    @Override
    public ITaskOrganizerController getTaskOrganizerController() {
        mAmInternal.enforceCallingPermission(MANAGE_ACTIVITY_STACKS,
                "getTaskOrganizerController()");
        return mTaskOrganizerController;
    }

    /**
     * Check that we have the features required for VR-related API calls, and throw an exception if
     * not.
     */
    public void enforceSystemHasVrFeature() {
        if (!mContext.getPackageManager().hasSystemFeature(
                PackageManager.FEATURE_VR_MODE_HIGH_PERFORMANCE)) {
            throw new UnsupportedOperationException("VR mode not supported on this device!");
        }
    }

    @Override
    public int setVrMode(IBinder token, boolean enabled, ComponentName packageName) {
        enforceSystemHasVrFeature();

        final VrManagerInternal vrService = LocalServices.getService(VrManagerInternal.class);

        ActivityRecord r;
        synchronized (mGlobalLock) {
            r = ActivityRecord.isInStackLocked(token);
        }

        if (r == null) {
            throw new IllegalArgumentException();
        }

        int err;
        if ((err = vrService.hasVrPackage(packageName, r.mUserId)) !=
                VrManagerInternal.NO_ERROR) {
            return err;
        }

        // Clear the binder calling uid since this path may call moveToTask().
        final long callingId = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                r.requestedVrComponent = (enabled) ? packageName : null;

                // Update associated state if this activity is currently focused
                if (r.isResumedActivityOnDisplay()) {
                    applyUpdateVrModeLocked(r);
                }
                return 0;
            }
        } finally {
            Binder.restoreCallingIdentity(callingId);
        }
    }

    @Override
    public void startLocalVoiceInteraction(IBinder callingActivity, Bundle options) {
        Slog.i(TAG, "Activity tried to startLocalVoiceInteraction");
        synchronized (mGlobalLock) {
            ActivityRecord activity = getTopDisplayFocusedStack().getTopNonFinishingActivity();
            if (ActivityRecord.forTokenLocked(callingActivity) != activity) {
                throw new SecurityException("Only focused activity can call startVoiceInteraction");
            }
            if (mRunningVoice != null || activity.getTask().voiceSession != null
                    || activity.voiceSession != null) {
                Slog.w(TAG, "Already in a voice interaction, cannot start new voice interaction");
                return;
            }
            if (activity.pendingVoiceInteractionStart) {
                Slog.w(TAG, "Pending start of voice interaction already.");
                return;
            }
            activity.pendingVoiceInteractionStart = true;
        }
        LocalServices.getService(VoiceInteractionManagerInternal.class)
                .startLocalVoiceInteraction(callingActivity, options);
    }

    @Override
    public void stopLocalVoiceInteraction(IBinder callingActivity) {
        LocalServices.getService(VoiceInteractionManagerInternal.class)
                .stopLocalVoiceInteraction(callingActivity);
    }

    @Override
    public boolean supportsLocalVoiceInteraction() {
        return LocalServices.getService(VoiceInteractionManagerInternal.class)
                .supportsLocalVoiceInteraction();
    }

    @Override
    public boolean updateConfiguration(Configuration values) {
        mAmInternal.enforceCallingPermission(CHANGE_CONFIGURATION, "updateConfiguration()");

        synchronized (mGlobalLock) {
            if (mWindowManager == null) {
                Slog.w(TAG, "Skip updateConfiguration because mWindowManager isn't set");
                return false;
            }

            if (values == null) {
                // sentinel: fetch the current configuration from the window manager
                values = mWindowManager.computeNewConfiguration(DEFAULT_DISPLAY);
            }

            mH.sendMessage(PooledLambda.obtainMessage(
                    ActivityManagerInternal::updateOomLevelsForDisplay, mAmInternal,
                    DEFAULT_DISPLAY));

            final long origId = Binder.clearCallingIdentity();
            try {
                if (values != null) {
                    Settings.System.clearConfiguration(values);
                }
                updateConfigurationLocked(values, null, false, false /* persistent */,
                        UserHandle.USER_NULL, false /* deferResume */,
                        mTmpUpdateConfigurationResult);
                return mTmpUpdateConfigurationResult.changes != 0;
            } finally {
                Binder.restoreCallingIdentity(origId);
            }
        }
    }

    @Override
    public void dismissKeyguard(IBinder token, IKeyguardDismissCallback callback,
            CharSequence message) {
        if (message != null) {
            mAmInternal.enforceCallingPermission(
                    Manifest.permission.SHOW_KEYGUARD_MESSAGE, "dismissKeyguard()");
        }
        final long callingId = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                mKeyguardController.dismissKeyguard(token, callback, message);
            }
        } finally {
            Binder.restoreCallingIdentity(callingId);
        }
    }

    @Override
    public void cancelTaskWindowTransition(int taskId) {
        enforceCallerIsRecentsOrHasPermission(MANAGE_ACTIVITY_STACKS,
                "cancelTaskWindowTransition()");
        final long ident = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                final Task task = mRootWindowContainer.anyTaskForId(taskId,
                        MATCH_TASK_IN_STACKS_ONLY);
                if (task == null) {
                    Slog.w(TAG, "cancelTaskWindowTransition: taskId=" + taskId + " not found");
                    return;
                }
                task.cancelTaskWindowTransition();
            }
        } finally {
            Binder.restoreCallingIdentity(ident);
        }
    }

    @Override
    public ActivityManager.TaskSnapshot getTaskSnapshot(int taskId, boolean isLowResolution) {
        enforceCallerIsRecentsOrHasPermission(READ_FRAME_BUFFER, "getTaskSnapshot()");
        final long ident = Binder.clearCallingIdentity();
        try {
            return getTaskSnapshot(taskId, isLowResolution, true /* restoreFromDisk */);
        } finally {
            Binder.restoreCallingIdentity(ident);
        }
    }

    private ActivityManager.TaskSnapshot getTaskSnapshot(int taskId, boolean isLowResolution,
            boolean restoreFromDisk) {
        final Task task;
        synchronized (mGlobalLock) {
            task = mRootWindowContainer.anyTaskForId(taskId,
                    MATCH_TASK_IN_STACKS_OR_RECENT_TASKS);
            if (task == null) {
                Slog.w(TAG, "getTaskSnapshot: taskId=" + taskId + " not found");
                return null;
            }
        }
        // Don't call this while holding the lock as this operation might hit the disk.
        return task.getSnapshot(isLowResolution, restoreFromDisk);
    }

    @Override
    public void setDisablePreviewScreenshots(IBinder token, boolean disable) {
        synchronized (mGlobalLock) {
            final ActivityRecord r = ActivityRecord.isInStackLocked(token);
            if (r == null) {
                Slog.w(TAG, "setDisablePreviewScreenshots: Unable to find activity for token="
                        + token);
                return;
            }
            final long origId = Binder.clearCallingIdentity();
            try {
                r.setDisablePreviewScreenshots(disable);
            } finally {
                Binder.restoreCallingIdentity(origId);
            }
        }
    }

    @Override
    public void invalidateHomeTaskSnapshot(IBinder token) {
        synchronized (mGlobalLock) {
            final ActivityRecord r = ActivityRecord.isInStackLocked(token);
            if (r == null || !r.isActivityTypeHome()) {
                return;
            }
            mWindowManager.mTaskSnapshotController.removeSnapshotCache(r.getTask().mTaskId);
        }
    }

    /** Return the user id of the last resumed activity. */
    @Override
    public @UserIdInt
    int getLastResumedActivityUserId() {
        mAmInternal.enforceCallingPermission(
                Manifest.permission.INTERACT_ACROSS_USERS_FULL, "getLastResumedActivityUserId()");
        synchronized (mGlobalLock) {
            if (mLastResumedActivity == null) {
                return getCurrentUserId();
            }
            return mLastResumedActivity.mUserId;
        }
    }

    @Override
    public void updateLockTaskFeatures(int userId, int flags) {
        final int callingUid = Binder.getCallingUid();
        if (callingUid != 0 && callingUid != SYSTEM_UID) {
            mAmInternal.enforceCallingPermission(android.Manifest.permission.UPDATE_LOCK_TASK_PACKAGES,
                    "updateLockTaskFeatures()");
        }
        synchronized (mGlobalLock) {
            if (DEBUG_LOCKTASK) Slog.w(TAG_LOCKTASK, "Allowing features " + userId + ":0x" +
                    Integer.toHexString(flags));
            getLockTaskController().updateLockTaskFeatures(userId, flags);
        }
    }

    @Override
    public void setShowWhenLocked(IBinder token, boolean showWhenLocked) {
        synchronized (mGlobalLock) {
            final ActivityRecord r = ActivityRecord.isInStackLocked(token);
            if (r == null) {
                return;
            }
            final long origId = Binder.clearCallingIdentity();
            try {
                r.setShowWhenLocked(showWhenLocked);
            } finally {
                Binder.restoreCallingIdentity(origId);
            }
        }
    }

    @Override
    public void setInheritShowWhenLocked(IBinder token, boolean inheritShowWhenLocked) {
        synchronized (mGlobalLock) {
            final ActivityRecord r = ActivityRecord.isInStackLocked(token);
            if (r == null) {
                return;
            }
            final long origId = Binder.clearCallingIdentity();
            try {
                r.setInheritShowWhenLocked(inheritShowWhenLocked);
            } finally {
                Binder.restoreCallingIdentity(origId);
            }
        }
    }

    @Override
    public void setTurnScreenOn(IBinder token, boolean turnScreenOn) {
        synchronized (mGlobalLock) {
            final ActivityRecord r = ActivityRecord.isInStackLocked(token);
            if (r == null) {
                return;
            }
            final long origId = Binder.clearCallingIdentity();
            try {
                r.setTurnScreenOn(turnScreenOn);
            } finally {
                Binder.restoreCallingIdentity(origId);
            }
        }
    }

    @Override
    public void registerRemoteAnimations(IBinder token, RemoteAnimationDefinition definition) {
        mAmInternal.enforceCallingPermission(CONTROL_REMOTE_APP_TRANSITION_ANIMATIONS,
                "registerRemoteAnimations");
        definition.setCallingPidUid(Binder.getCallingPid(), Binder.getCallingUid());
        synchronized (mGlobalLock) {
            final ActivityRecord r = ActivityRecord.isInStackLocked(token);
            if (r == null) {
                return;
            }
            final long origId = Binder.clearCallingIdentity();
            try {
                r.registerRemoteAnimations(definition);
            } finally {
                Binder.restoreCallingIdentity(origId);
            }
        }
    }

    @Override
    public void unregisterRemoteAnimations(IBinder token) {
        mAmInternal.enforceCallingPermission(CONTROL_REMOTE_APP_TRANSITION_ANIMATIONS,
                "unregisterRemoteAnimations");
        synchronized (mGlobalLock) {
            final ActivityRecord r = ActivityRecord.isInStackLocked(token);
            if (r == null) {
                return;
            }
            final long origId = Binder.clearCallingIdentity();
            try {
                r.unregisterRemoteAnimations();
            } finally {
                Binder.restoreCallingIdentity(origId);
            }
        }
    }

    @Override
    public void registerRemoteAnimationForNextActivityStart(String packageName,
            RemoteAnimationAdapter adapter) {
        mAmInternal.enforceCallingPermission(CONTROL_REMOTE_APP_TRANSITION_ANIMATIONS,
                "registerRemoteAnimationForNextActivityStart");
        adapter.setCallingPidUid(Binder.getCallingPid(), Binder.getCallingUid());
        synchronized (mGlobalLock) {
            final long origId = Binder.clearCallingIdentity();
            try {
                getActivityStartController().registerRemoteAnimationForNextActivityStart(
                        packageName, adapter);
            } finally {
                Binder.restoreCallingIdentity(origId);
            }
        }
    }

    @Override
    public void registerRemoteAnimationsForDisplay(int displayId,
            RemoteAnimationDefinition definition) {
        mAmInternal.enforceCallingPermission(CONTROL_REMOTE_APP_TRANSITION_ANIMATIONS,
                "registerRemoteAnimations");
        definition.setCallingPidUid(Binder.getCallingPid(), Binder.getCallingUid());
        synchronized (mGlobalLock) {
            final DisplayContent display = mRootWindowContainer.getDisplayContent(displayId);
            if (display == null) {
                Slog.e(TAG, "Couldn't find display with id: " + displayId);
                return;
            }
            final long origId = Binder.clearCallingIdentity();
            try {
                display.mDisplayContent.registerRemoteAnimations(definition);
            } finally {
                Binder.restoreCallingIdentity(origId);
            }
        }
    }

    /** @see android.app.ActivityManager#alwaysShowUnsupportedCompileSdkWarning */
    @Override
    public void alwaysShowUnsupportedCompileSdkWarning(ComponentName activity) {
        synchronized (mGlobalLock) {
            final long origId = Binder.clearCallingIdentity();
            try {
                mAppWarnings.alwaysShowUnsupportedCompileSdkWarning(activity);
            } finally {
                Binder.restoreCallingIdentity(origId);
            }
        }
    }

    @Override
    public void setVrThread(int tid) {
        enforceSystemHasVrFeature();
        synchronized (mGlobalLock) {
            final int pid = Binder.getCallingPid();
            final WindowProcessController wpc = mProcessMap.getProcess(pid);
            mVrController.setVrThreadLocked(tid, pid, wpc);
        }
    }

    @Override
    public void setPersistentVrThread(int tid) {
        if (checkCallingPermission(Manifest.permission.RESTRICTED_VR_ACCESS)
                != PERMISSION_GRANTED) {
            final String msg = "Permission Denial: setPersistentVrThread() from pid="
                    + Binder.getCallingPid()
                    + ", uid=" + Binder.getCallingUid()
                    + " requires " + Manifest.permission.RESTRICTED_VR_ACCESS;
            Slog.w(TAG, msg);
            throw new SecurityException(msg);
        }
        enforceSystemHasVrFeature();
        synchronized (mGlobalLock) {
            final int pid = Binder.getCallingPid();
            final WindowProcessController proc = mProcessMap.getProcess(pid);
            mVrController.setPersistentVrThreadLocked(tid, pid, proc);
        }
    }

    @Override
    public void stopAppSwitches() {
        enforceCallerIsRecentsOrHasPermission(STOP_APP_SWITCHES, "stopAppSwitches");
        synchronized (mGlobalLock) {
            mAppSwitchesAllowedTime = SystemClock.uptimeMillis() + APP_SWITCH_DELAY_TIME;
            mLastStopAppSwitchesTime = SystemClock.uptimeMillis();
            mDidAppSwitch = false;
            getActivityStartController().schedulePendingActivityLaunches(APP_SWITCH_DELAY_TIME);
        }
    }

    @Override
    public void resumeAppSwitches() {
        enforceCallerIsRecentsOrHasPermission(STOP_APP_SWITCHES, "resumeAppSwitches");
        synchronized (mGlobalLock) {
            // Note that we don't execute any pending app switches... we will
            // let those wait until either the timeout, or the next start
            // activity request.
            mAppSwitchesAllowedTime = 0;
        }
    }

    long getLastStopAppSwitchesTime() {
        return mLastStopAppSwitchesTime;
    }

    void onStartActivitySetDidAppSwitch() {
        if (mDidAppSwitch) {
            // This is the second allowed switch since we stopped switches, so now just generally
            // allow switches. Use case:
            // - user presses home (switches disabled, switch to home, mDidAppSwitch now true);
            // - user taps a home icon (coming from home so allowed, we hit here and now allow
            // anyone to switch again).
            mAppSwitchesAllowedTime = 0;
        } else {
            mDidAppSwitch = true;
        }
    }

    /** @return whether the system should disable UI modes incompatible with VR mode. */
    boolean shouldDisableNonVrUiLocked() {
        return mVrController.shouldDisableNonVrUiLocked();
    }

    private void applyUpdateVrModeLocked(ActivityRecord r) {
        // VR apps are expected to run in a main display. If an app is turning on VR for
        // itself, but isn't on the main display, then move it there before enabling VR Mode.
        if (r.requestedVrComponent != null && r.getDisplayId() != DEFAULT_DISPLAY) {
            Slog.i(TAG, "Moving " + r.shortComponentName + " from display " + r.getDisplayId()
                    + " to main display for VR");
            mRootWindowContainer.moveStackToDisplay(
                    r.getRootTaskId(), DEFAULT_DISPLAY, true /* toTop */);
        }
        mH.post(() -> {
            if (!mVrController.onVrModeChanged(r)) {
                return;
            }
            synchronized (mGlobalLock) {
                final boolean disableNonVrUi = mVrController.shouldDisableNonVrUiLocked();
                mWindowManager.disableNonVrUi(disableNonVrUi);
                if (disableNonVrUi) {
                    // If we are in a VR mode where Picture-in-Picture mode is unsupported,
                    // then remove the pinned stack.
                    mRootWindowContainer.removeStacksInWindowingModes(WINDOWING_MODE_PINNED);
                }
            }
        });
    }

    @Override
    public int getPackageScreenCompatMode(String packageName) {
        enforceNotIsolatedCaller("getPackageScreenCompatMode");
        synchronized (mGlobalLock) {
            return mCompatModePackages.getPackageScreenCompatModeLocked(packageName);
        }
    }

    @Override
    public void setPackageScreenCompatMode(String packageName, int mode) {
        mAmInternal.enforceCallingPermission(android.Manifest.permission.SET_SCREEN_COMPATIBILITY,
                "setPackageScreenCompatMode");
        synchronized (mGlobalLock) {
            mCompatModePackages.setPackageScreenCompatModeLocked(packageName, mode);
        }
    }

    @Override
    public boolean getPackageAskScreenCompat(String packageName) {
        enforceNotIsolatedCaller("getPackageAskScreenCompat");
        synchronized (mGlobalLock) {
            return mCompatModePackages.getPackageAskCompatModeLocked(packageName);
        }
    }

    @Override
    public void setPackageAskScreenCompat(String packageName, boolean ask) {
        mAmInternal.enforceCallingPermission(android.Manifest.permission.SET_SCREEN_COMPATIBILITY,
                "setPackageAskScreenCompat");
        synchronized (mGlobalLock) {
            mCompatModePackages.setPackageAskCompatModeLocked(packageName, ask);
        }
    }

    public static String relaunchReasonToString(int relaunchReason) {
        switch (relaunchReason) {
            case RELAUNCH_REASON_WINDOWING_MODE_RESIZE:
                return "window_resize";
            case RELAUNCH_REASON_FREE_RESIZE:
                return "free_resize";
            default:
                return null;
        }
    }

    ActivityStack getTopDisplayFocusedStack() {
        return mRootWindowContainer.getTopDisplayFocusedStack();
    }

    /** Pokes the task persister. */
    void notifyTaskPersisterLocked(Task task, boolean flush) {
        mRecentTasks.notifyTaskPersisterLocked(task, flush);
    }

    boolean isKeyguardLocked() {
        return mKeyguardController.isKeyguardLocked();
    }

    /**
     * Clears launch params for the given package.
     * @param packageNames the names of the packages of which the launch params are to be cleared
     */
    @Override
    public void clearLaunchParamsForPackages(List<String> packageNames) {
        mAmInternal.enforceCallingPermission(Manifest.permission.MANAGE_ACTIVITY_STACKS,
                "clearLaunchParamsForPackages");
        synchronized (mGlobalLock) {
            for (int i = 0; i < packageNames.size(); ++i) {
                mStackSupervisor.mLaunchParamsPersister.removeRecordForPackage(packageNames.get(i));
            }
        }
    }

    /**
     * Makes the display with the given id a single task instance display. I.e the display can only
     * contain one task.
     */
    @Override
    public void setDisplayToSingleTaskInstance(int displayId) {
        mAmInternal.enforceCallingPermission(Manifest.permission.MANAGE_ACTIVITY_STACKS,
                "setDisplayToSingleTaskInstance");
        final long origId = Binder.clearCallingIdentity();
        try {
            final DisplayContent display =
                    mRootWindowContainer.getDisplayContentOrCreate(displayId);
            if (display != null) {
                display.setDisplayToSingleTaskInstance();
            }
        } finally {
            Binder.restoreCallingIdentity(origId);
        }
    }

    /**
     * Requests that an activity should enter picture-in-picture mode if possible.
     */
    @Override
    public void requestPictureInPictureMode(IBinder token) throws RemoteException {
        mAmInternal.enforceCallingPermission(Manifest.permission.MANAGE_ACTIVITY_STACKS,
                "requestPictureInPictureMode");
        final long origId = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                final ActivityRecord activity = ActivityRecord.forTokenLocked(token);
                if (activity == null) {
                    return;
                }

                final boolean canEnterPictureInPicture = activity.checkEnterPictureInPictureState(
                        "requestPictureInPictureMode", /* beforeStopping */ false);
                if (!canEnterPictureInPicture) {
                    throw new IllegalStateException(
                            "Requested PIP on an activity that doesn't support it");
                }

                try {
                    final ClientTransaction transaction = ClientTransaction.obtain(
                            activity.app.getThread(),
                            activity.token);
                    transaction.addCallback(EnterPipRequestedItem.obtain());
                    getLifecycleManager().scheduleTransaction(transaction);
                } catch (Exception e) {
                    Slog.w(TAG, "Failed to send enter pip requested item: "
                            + activity.intent.getComponent(), e);
                }
            }
        } finally {
            Binder.restoreCallingIdentity(origId);
        }
    }

    void dumpLastANRLocked(PrintWriter pw) {
        pw.println("ACTIVITY MANAGER LAST ANR (dumpsys activity lastanr)");
        if (mLastANRState == null) {
            pw.println("  <no ANR has occurred since boot>");
        } else {
            pw.println(mLastANRState);
        }
    }

    void dumpLastANRTracesLocked(PrintWriter pw) {
        pw.println("ACTIVITY MANAGER LAST ANR TRACES (dumpsys activity lastanr-traces)");

        final File[] files = new File(ANR_TRACE_DIR).listFiles();
        if (ArrayUtils.isEmpty(files)) {
            pw.println("  <no ANR has occurred since boot>");
            return;
        }
        // Find the latest file.
        File latest = null;
        for (File f : files) {
            if ((latest == null) || (latest.lastModified() < f.lastModified())) {
                latest = f;
            }
        }
        pw.print("File: ");
        pw.print(latest.getName());
        pw.println();
        try (BufferedReader in = new BufferedReader(new FileReader(latest))) {
            String line;
            while ((line = in.readLine()) != null) {
                pw.println(line);
            }
        } catch (IOException e) {
            pw.print("Unable to read: ");
            pw.print(e);
            pw.println();
        }
    }

    void dumpActivitiesLocked(FileDescriptor fd, PrintWriter pw, String[] args,
            int opti, boolean dumpAll, boolean dumpClient, String dumpPackage) {
        dumpActivitiesLocked(fd, pw, args, opti, dumpAll, dumpClient, dumpPackage,
                "ACTIVITY MANAGER ACTIVITIES (dumpsys activity activities)");
    }

    void dumpActivitiesLocked(FileDescriptor fd, PrintWriter pw, String[] args,
            int opti, boolean dumpAll, boolean dumpClient, String dumpPackage, String header) {
        pw.println(header);

        boolean printedAnything = mRootWindowContainer.dumpActivities(fd, pw, dumpAll, dumpClient,
                dumpPackage);
        boolean needSep = printedAnything;

        boolean printed = ActivityStackSupervisor.printThisActivity(pw,
                mRootWindowContainer.getTopResumedActivity(),  dumpPackage, needSep,
                "  ResumedActivity: ");
        if (printed) {
            printedAnything = true;
            needSep = false;
        }

        if (dumpPackage == null) {
            if (needSep) {
                pw.println();
            }
            printedAnything = true;
            mStackSupervisor.dump(pw, "  ");
        }

        if (!printedAnything) {
            pw.println("  (nothing)");
        }
    }

    void dumpActivityContainersLocked(PrintWriter pw) {
        pw.println("ACTIVITY MANAGER CONTAINERS (dumpsys activity containers)");
        mRootWindowContainer.dumpChildrenNames(pw, " ");
        pw.println(" ");
    }

    void dumpActivityStarterLocked(PrintWriter pw, String dumpPackage) {
        pw.println("ACTIVITY MANAGER STARTER (dumpsys activity starter)");
        getActivityStartController().dump(pw, "", dumpPackage);
    }

    /**
     * There are three things that cmd can be:
     *  - a flattened component name that matches an existing activity
     *  - the cmd arg isn't the flattened component name of an existing activity:
     *    dump all activity whose component contains the cmd as a substring
     *  - A hex number of the ActivityRecord object instance.
     * <p>
     * The caller should not hold lock when calling this method because it will wait for the
     * activities to complete the dump.
     *
     *  @param dumpVisibleStacksOnly dump activity with {@param name} only if in a visible stack
     *  @param dumpFocusedStackOnly dump activity with {@param name} only if in the focused stack
     */
    protected boolean dumpActivity(FileDescriptor fd, PrintWriter pw, String name, String[] args,
            int opti, boolean dumpAll, boolean dumpVisibleStacksOnly, boolean dumpFocusedStackOnly) {
        ArrayList<ActivityRecord> activities;

        synchronized (mGlobalLock) {
            activities = mRootWindowContainer.getDumpActivities(name, dumpVisibleStacksOnly,
                    dumpFocusedStackOnly);
        }

        if (activities.size() <= 0) {
            return false;
        }

        String[] newArgs = new String[args.length - opti];
        System.arraycopy(args, opti, newArgs, 0, args.length - opti);

        Task lastTask = null;
        boolean needSep = false;
        for (int i = activities.size() - 1; i >= 0; i--) {
            ActivityRecord r = activities.get(i);
            if (needSep) {
                pw.println();
            }
            needSep = true;
            synchronized (mGlobalLock) {
                final Task task = r.getTask();
                if (lastTask != task) {
                    lastTask = task;
                    pw.print("TASK "); pw.print(lastTask.affinity);
                    pw.print(" id="); pw.print(lastTask.mTaskId);
                    pw.print(" userId="); pw.println(lastTask.mUserId);
                    if (dumpAll) {
                        lastTask.dump(pw, "  ");
                    }
                }
            }
            dumpActivity("  ", fd, pw, activities.get(i), newArgs, dumpAll);
        }
        return true;
    }

    /**
     * Invokes IApplicationThread.dumpActivity() on the thread of the specified activity if
     * there is a thread associated with the activity.
     */
    private void dumpActivity(String prefix, FileDescriptor fd, PrintWriter pw,
            final ActivityRecord r, String[] args, boolean dumpAll) {
        String innerPrefix = prefix + "  ";
        IApplicationThread appThread = null;
        synchronized (mGlobalLock) {
            pw.print(prefix); pw.print("ACTIVITY "); pw.print(r.shortComponentName);
            pw.print(" "); pw.print(Integer.toHexString(System.identityHashCode(r)));
            pw.print(" pid=");
            if (r.hasProcess()) {
                pw.println(r.app.getPid());
                appThread = r.app.getThread();
            } else {
                pw.println("(not running)");
            }
            if (dumpAll) {
                r.dump(pw, innerPrefix, true /* dumpAll */);
            }
        }
        if (appThread != null) {
            // flush anything that is already in the PrintWriter since the thread is going
            // to write to the file descriptor directly
            pw.flush();
            try (TransferPipe tp = new TransferPipe()) {
                appThread.dumpActivity(tp.getWriteFd(), r.appToken, innerPrefix, args);
                tp.go(fd);
            } catch (IOException e) {
                pw.println(innerPrefix + "Failure while dumping the activity: " + e);
            } catch (RemoteException e) {
                pw.println(innerPrefix + "Got a RemoteException while dumping the activity");
            }
        }
    }

    private void writeSleepStateToProto(ProtoOutputStream proto, int wakeFullness,
            boolean testPssMode) {
        final long sleepToken = proto.start(ActivityManagerServiceDumpProcessesProto.SLEEP_STATUS);
        proto.write(ActivityManagerServiceDumpProcessesProto.SleepStatus.WAKEFULNESS,
                PowerManagerInternal.wakefulnessToProtoEnum(wakeFullness));
        for (ActivityTaskManagerInternal.SleepToken st : mRootWindowContainer.mSleepTokens) {
            proto.write(ActivityManagerServiceDumpProcessesProto.SleepStatus.SLEEP_TOKENS,
                    st.toString());
        }
        proto.write(ActivityManagerServiceDumpProcessesProto.SleepStatus.SLEEPING, mSleeping);
        proto.write(ActivityManagerServiceDumpProcessesProto.SleepStatus.SHUTTING_DOWN,
                mShuttingDown);
        proto.write(ActivityManagerServiceDumpProcessesProto.SleepStatus.TEST_PSS_MODE,
                testPssMode);
        proto.end(sleepToken);
    }

    int getCurrentUserId() {
        return mAmInternal.getCurrentUserId();
    }

    private void enforceNotIsolatedCaller(String caller) {
        if (UserHandle.isIsolated(Binder.getCallingUid())) {
            throw new SecurityException("Isolated process not allowed to call " + caller);
        }
    }

    public Configuration getConfiguration() {
        Configuration ci;
        synchronized(mGlobalLock) {
            ci = new Configuration(getGlobalConfigurationForCallingPid());
            ci.userSetLocale = false;
        }
        return ci;
    }

    /**
     * Current global configuration information. Contains general settings for the entire system,
     * also corresponds to the merged configuration of the default display.
     */
    Configuration getGlobalConfiguration() {
        // Return default configuration before mRootWindowContainer initialized, which happens
        // while initializing process record for system, see {@link
        // ActivityManagerService#setSystemProcess}.
        return mRootWindowContainer != null ? mRootWindowContainer.getConfiguration()
                : new Configuration();
    }

    boolean updateConfigurationLocked(Configuration values, ActivityRecord starting,
            boolean initLocale) {
        return updateConfigurationLocked(values, starting, initLocale, false /* deferResume */);
    }

    boolean updateConfigurationLocked(Configuration values, ActivityRecord starting,
            boolean initLocale, boolean deferResume) {
        // pass UserHandle.USER_NULL as userId because we don't persist configuration for any user
        return updateConfigurationLocked(values, starting, initLocale, false /* persistent */,
                UserHandle.USER_NULL, deferResume);
    }

    public void updatePersistentConfiguration(Configuration values, @UserIdInt int userId) {
        final long origId = Binder.clearCallingIdentity();
        try {
            synchronized (mGlobalLock) {
                updateConfigurationLocked(values, null, false, true, userId,
                        false /* deferResume */);
            }
        } finally {
            Binder.restoreCallingIdentity(origId);
        }
    }

    private boolean updateConfigurationLocked(Configuration values, ActivityRecord starting,
            boolean initLocale, boolean persistent, int userId, boolean deferResume) {
        return updateConfigurationLocked(values, starting, initLocale, persistent, userId,
                deferResume, null /* result */);
    }

    /**
     * Do either or both things: (1) change the current configuration, and (2)
     * make sure the given activity is running with the (now) current
     * configuration.  Returns true if the activity has been left running, or
     * false if <var>starting</var> is being destroyed to match the new
     * configuration.
     *
     * @param userId is only used when persistent parameter is set to true to persist configuration
     *               for that particular user
     */
    boolean updateConfigurationLocked(Configuration values, ActivityRecord starting,
            boolean initLocale, boolean persistent, int userId, boolean deferResume,
            ActivityTaskManagerService.UpdateConfigurationResult result) {
        int changes = 0;
        boolean kept = true;

        deferWindowLayout();
        try {
            if (values != null) {
                changes = updateGlobalConfigurationLocked(values, initLocale, persistent, userId,
                        deferResume);
            }

            kept = ensureConfigAndVisibilityAfterUpdate(starting, changes);
        } finally {
            continueWindowLayout();
        }

        if (result != null) {
            result.changes = changes;
            result.activityRelaunched = !kept;
        }
        return kept;
    }

    /** Update default (global) configuration and notify listeners about changes. */
    int updateGlobalConfigurationLocked(@NonNull Configuration values, boolean initLocale,
            boolean persistent, int userId, boolean deferResume) {

        final DisplayContent defaultDisplay =
                mRootWindowContainer.getDisplayContent(DEFAULT_DISPLAY);

        mTempConfig.setTo(getGlobalConfiguration());
        final int changes = mTempConfig.updateFrom(values);
        if (changes == 0) {
            // Since calling to Activity.setRequestedOrientation leads to freezing the window with
            // setting WindowManagerService.mWaitingForConfig to true, it is important that we call
            // performDisplayOverrideConfigUpdate in order to send the new display configuration
            // (even if there are no actual changes) to unfreeze the window.
            defaultDisplay.performDisplayOverrideConfigUpdate(values, deferResume);
            return 0;
        }

        if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.i(TAG_CONFIGURATION,
                "Updating global configuration to: " + values);
        writeConfigurationChanged(changes);
        FrameworkStatsLog.write(FrameworkStatsLog.RESOURCE_CONFIGURATION_CHANGED,
                values.colorMode,
                values.densityDpi,
                values.fontScale,
                values.hardKeyboardHidden,
                values.keyboard,
                values.keyboardHidden,
                values.mcc,
                values.mnc,
                values.navigation,
                values.navigationHidden,
                values.orientation,
                values.screenHeightDp,
                values.screenLayout,
                values.screenWidthDp,
                values.smallestScreenWidthDp,
                values.touchscreen,
                values.uiMode);


        if (!initLocale && !values.getLocales().isEmpty() && values.userSetLocale) {
            final LocaleList locales = values.getLocales();
            int bestLocaleIndex = 0;
            if (locales.size() > 1) {
                if (mSupportedSystemLocales == null) {
                    mSupportedSystemLocales = Resources.getSystem().getAssets().getLocales();
                }
                bestLocaleIndex = Math.max(0, locales.getFirstMatchIndex(mSupportedSystemLocales));
            }
            SystemProperties.set("persist.sys.locale",
                    locales.get(bestLocaleIndex).toLanguageTag());
            LocaleList.setDefault(locales, bestLocaleIndex);

            final Message m = PooledLambda.obtainMessage(
                    ActivityTaskManagerService::sendLocaleToMountDaemonMsg, this,
                    locales.get(bestLocaleIndex));
            mH.sendMessage(m);
        }

        mTempConfig.seq = increaseConfigurationSeqLocked();

        // Update stored global config and notify everyone about the change.
        mRootWindowContainer.onConfigurationChanged(mTempConfig);

        Slog.i(TAG, "Config changes=" + Integer.toHexString(changes) + " " + mTempConfig);
        // TODO(multi-display): Update UsageEvents#Event to include displayId.
        mUsageStatsInternal.reportConfigurationChange(mTempConfig, mAmInternal.getCurrentUserId());

        // TODO: If our config changes, should we auto dismiss any currently showing dialogs?
        updateShouldShowDialogsLocked(mTempConfig);

        AttributeCache ac = AttributeCache.instance();
        if (ac != null) {
            ac.updateConfiguration(mTempConfig);
        }

        // Make sure all resources in our process are updated right now, so that anyone who is going
        // to retrieve resource values after we return will be sure to get the new ones. This is
        // especially important during boot, where the first config change needs to guarantee all
        // resources have that config before following boot code is executed.
        mSystemThread.applyConfigurationToResources(mTempConfig);

        // We need another copy of global config because we're scheduling some calls instead of
        // running them in place. We need to be sure that object we send will be handled unchanged.
        final Configuration configCopy = new Configuration(mTempConfig);
        if (persistent && Settings.System.hasInterestingConfigurationChanges(changes)) {
            final Message msg = PooledLambda.obtainMessage(
                    ActivityTaskManagerService::sendPutConfigurationForUserMsg,
                    this, userId, configCopy);
            mH.sendMessage(msg);
        }

        SparseArray<WindowProcessController> pidMap = mProcessMap.getPidMap();
        for (int i = pidMap.size() - 1; i >= 0; i--) {
            final int pid = pidMap.keyAt(i);
            final WindowProcessController app = pidMap.get(pid);
            if (DEBUG_CONFIGURATION) {
                Slog.v(TAG_CONFIGURATION, "Update process config of "
                        + app.mName + " to new config " + configCopy);
            }
            app.onConfigurationChanged(configCopy);
        }

        final Message msg = PooledLambda.obtainMessage(
                ActivityManagerInternal::broadcastGlobalConfigurationChanged,
                mAmInternal, changes, initLocale);
        mH.sendMessage(msg);

        // Override configuration of the default display duplicates global config, so we need to
        // update it also. This will also notify WindowManager about changes.
        defaultDisplay.performDisplayOverrideConfigUpdate(mRootWindowContainer.getConfiguration(),
                deferResume);

        return changes;
    }

    /** @see WindowSurfacePlacer#deferLayout */
    void deferWindowLayout() {
        if (!mWindowManager.mWindowPlacerLocked.isLayoutDeferred()) {
            // Reset the reasons at the first entrance because we only care about the changes in the
            // deferred scope.
            mLayoutReasons = 0;
        }

        mWindowManager.mWindowPlacerLocked.deferLayout();
    }

    /** @see WindowSurfacePlacer#continueLayout */
    void continueWindowLayout() {
        mWindowManager.mWindowPlacerLocked.continueLayout(mLayoutReasons != 0);
        if (DEBUG_ALL && !mWindowManager.mWindowPlacerLocked.isLayoutDeferred()) {
            Slog.i(TAG, "continueWindowLayout reason=" + mLayoutReasons);
        }
    }

    /**
     * If a reason is added between {@link #deferWindowLayout} and {@link #continueWindowLayout},
     * it will make sure {@link WindowSurfacePlacer#performSurfacePlacement} is called when the last
     * defer count is gone.
     */
    void addWindowLayoutReasons(@LayoutReason int reasons) {
        mLayoutReasons |= reasons;
    }

    private void updateEventDispatchingLocked(boolean booted) {
        mWindowManager.setEventDispatching(booted && !mShuttingDown);
    }

    private void sendPutConfigurationForUserMsg(int userId, Configuration config) {
        final ContentResolver resolver = mContext.getContentResolver();
        Settings.System.putConfigurationForUser(resolver, config, userId);
    }

    private void sendLocaleToMountDaemonMsg(Locale l) {
        try {
            IBinder service = ServiceManager.getService("mount");
            IStorageManager storageManager = IStorageManager.Stub.asInterface(service);
            Log.d(TAG, "Storing locale " + l.toLanguageTag() + " for decryption UI");
            storageManager.setField(StorageManager.SYSTEM_LOCALE_KEY, l.toLanguageTag());
        } catch (RemoteException e) {
            Log.e(TAG, "Error storing locale for decryption UI", e);
        }
    }

    private void expireStartAsCallerTokenMsg(IBinder permissionToken) {
        mStartActivitySources.remove(permissionToken);
        mExpiredStartAsCallerTokens.add(permissionToken);
    }

    private void forgetStartAsCallerTokenMsg(IBinder permissionToken) {
        mExpiredStartAsCallerTokens.remove(permissionToken);
    }

    boolean isActivityStartsLoggingEnabled() {
        return mAmInternal.isActivityStartsLoggingEnabled();
    }

    boolean isBackgroundActivityStartsEnabled() {
        return mAmInternal.isBackgroundActivityStartsEnabled();
    }

    void enableScreenAfterBoot(boolean booted) {
        writeBootProgressEnableScreen(SystemClock.uptimeMillis());
        mWindowManager.enableScreenAfterBoot();

        synchronized (mGlobalLock) {
            updateEventDispatchingLocked(booted);
        }
    }

    static long getInputDispatchingTimeoutLocked(ActivityRecord r) {
        if (r == null || !r.hasProcess()) {
            return KEY_DISPATCHING_TIMEOUT_MS;
        }
        return getInputDispatchingTimeoutLocked(r.app);
    }

    private static long getInputDispatchingTimeoutLocked(WindowProcessController r) {
        return r != null ? r.getInputDispatchingTimeout() : KEY_DISPATCHING_TIMEOUT_MS;
    }

    /**
     * Decide based on the configuration whether we should show the ANR,
     * crash, etc dialogs.  The idea is that if there is no affordance to
     * press the on-screen buttons, or the user experience would be more
     * greatly impacted than the crash itself, we shouldn't show the dialog.
     *
     * A thought: SystemUI might also want to get told about this, the Power
     * dialog / global actions also might want different behaviors.
     */
    private void updateShouldShowDialogsLocked(Configuration config) {
        final boolean inputMethodExists = !(config.keyboard == Configuration.KEYBOARD_NOKEYS
                && config.touchscreen == Configuration.TOUCHSCREEN_NOTOUCH
                && config.navigation == Configuration.NAVIGATION_NONAV);
        int modeType = config.uiMode & Configuration.UI_MODE_TYPE_MASK;
        final boolean uiModeSupportsDialogs = (modeType != Configuration.UI_MODE_TYPE_CAR
                && !(modeType == Configuration.UI_MODE_TYPE_WATCH && Build.IS_USER)
                && modeType != Configuration.UI_MODE_TYPE_TELEVISION
                && modeType != Configuration.UI_MODE_TYPE_VR_HEADSET);
        final boolean hideDialogsSet = Settings.Global.getInt(mContext.getContentResolver(),
                HIDE_ERROR_DIALOGS, 0) != 0;
        mShowDialogs = inputMethodExists && uiModeSupportsDialogs && !hideDialogsSet;
    }

    private void updateFontScaleIfNeeded(@UserIdInt int userId) {
        final float scaleFactor = Settings.System.getFloatForUser(mContext.getContentResolver(),
                FONT_SCALE, 1.0f, userId);

        synchronized (mGlobalLock) {
            if (getGlobalConfiguration().fontScale == scaleFactor) {
                return;
            }

            final Configuration configuration
                    = mWindowManager.computeNewConfiguration(DEFAULT_DISPLAY);
            configuration.fontScale = scaleFactor;
            updatePersistentConfiguration(configuration, userId);
        }
    }

    // Actually is sleeping or shutting down or whatever else in the future
    // is an inactive state.
    boolean isSleepingOrShuttingDownLocked() {
        return isSleepingLocked() || mShuttingDown;
    }

    boolean isSleepingLocked() {
        return mSleeping;
    }

    /** Update AMS states when an activity is resumed. */
    void setResumedActivityUncheckLocked(ActivityRecord r, String reason) {
        final Task task = r.getTask();
        if (task.isActivityTypeStandard()) {
            if (mCurAppTimeTracker != r.appTimeTracker) {
                // We are switching app tracking.  Complete the current one.
                if (mCurAppTimeTracker != null) {
                    mCurAppTimeTracker.stop();
                    mH.obtainMessage(
                            REPORT_TIME_TRACKER_MSG, mCurAppTimeTracker).sendToTarget();
                    mRootWindowContainer.clearOtherAppTimeTrackers(r.appTimeTracker);
                    mCurAppTimeTracker = null;
                }
                if (r.appTimeTracker != null) {
                    mCurAppTimeTracker = r.appTimeTracker;
                    startTimeTrackingFocusedActivityLocked();
                }
            } else {
                startTimeTrackingFocusedActivityLocked();
            }
        } else {
            r.appTimeTracker = null;
        }
        // TODO: VI Maybe r.task.voiceInteractor || r.voiceInteractor != null
        // TODO: Probably not, because we don't want to resume voice on switching
        // back to this activity
        if (task.voiceInteractor != null) {
            startRunningVoiceLocked(task.voiceSession, r.info.applicationInfo.uid);
        } else {
            finishRunningVoiceLocked();

            if (mLastResumedActivity != null) {
                final IVoiceInteractionSession session;

                final Task lastResumedActivityTask = mLastResumedActivity.getTask();
                if (lastResumedActivityTask != null
                        && lastResumedActivityTask.voiceSession != null) {
                    session = lastResumedActivityTask.voiceSession;
                } else {
                    session = mLastResumedActivity.voiceSession;
                }

                if (session != null) {
                    // We had been in a voice interaction session, but now focused has
                    // move to something different.  Just finish the session, we can't
                    // return to it and retain the proper state and synchronization with
                    // the voice interaction service.
                    finishVoiceTask(session);
                }
            }
        }

        if (mLastResumedActivity != null && r.mUserId != mLastResumedActivity.mUserId) {
            mAmInternal.sendForegroundProfileChanged(r.mUserId);
        }
        final Task prevTask = mLastResumedActivity != null ? mLastResumedActivity.getTask() : null;

        updateResumedAppTrace(r);
        mLastResumedActivity = r;

        r.getDisplay().setFocusedApp(r, true);

        if (prevTask == null || task != prevTask) {
            if (prevTask != null) {
                mTaskChangeNotificationController.notifyTaskFocusChanged(prevTask.mTaskId, false);
            }
            mTaskChangeNotificationController.notifyTaskFocusChanged(task.mTaskId, true);
        }

        applyUpdateLockStateLocked(r);
        applyUpdateVrModeLocked(r);

        EventLogTags.writeWmSetResumedActivity(
                r == null ? -1 : r.mUserId,
                r == null ? "NULL" : r.shortComponentName,
                reason);
    }

    ActivityTaskManagerInternal.SleepToken acquireSleepToken(String tag, int displayId) {
        synchronized (mGlobalLock) {
            final ActivityTaskManagerInternal.SleepToken token =
                    mRootWindowContainer.createSleepToken(tag, displayId);
            updateSleepIfNeededLocked();
            return token;
        }
    }

    void updateSleepIfNeededLocked() {
        final boolean shouldSleep = !mRootWindowContainer.hasAwakeDisplay();
        final boolean wasSleeping = mSleeping;
        boolean updateOomAdj = false;

        if (!shouldSleep) {
            // If wasSleeping is true, we need to wake up activity manager state from when
            // we started sleeping. In either case, we need to apply the sleep tokens, which
            // will wake up stacks or put them to sleep as appropriate.
            if (wasSleeping) {
                mSleeping = false;
                FrameworkStatsLog.write(FrameworkStatsLog.ACTIVITY_MANAGER_SLEEP_STATE_CHANGED,
                        FrameworkStatsLog.ACTIVITY_MANAGER_SLEEP_STATE_CHANGED__STATE__AWAKE);
                startTimeTrackingFocusedActivityLocked();
                mTopProcessState = ActivityManager.PROCESS_STATE_TOP;
                Slog.d(TAG, "Top Process State changed to PROCESS_STATE_TOP");
                mStackSupervisor.comeOutOfSleepIfNeededLocked();
            }
            mRootWindowContainer.applySleepTokens(true /* applyToStacks */);
            if (wasSleeping) {
                updateOomAdj = true;
            }
        } else if (!mSleeping && shouldSleep) {
            mSleeping = true;
            FrameworkStatsLog.write(FrameworkStatsLog.ACTIVITY_MANAGER_SLEEP_STATE_CHANGED,
                    FrameworkStatsLog.ACTIVITY_MANAGER_SLEEP_STATE_CHANGED__STATE__ASLEEP);
            if (mCurAppTimeTracker != null) {
                mCurAppTimeTracker.stop();
            }
            mTopProcessState = ActivityManager.PROCESS_STATE_TOP_SLEEPING;
            Slog.d(TAG, "Top Process State changed to PROCESS_STATE_TOP_SLEEPING");
            mStackSupervisor.goingToSleepLocked();
            updateResumedAppTrace(null /* resumed */);
            updateOomAdj = true;
        }
        if (updateOomAdj) {
            updateOomAdj();
        }
    }

    void updateOomAdj() {
        mH.removeCallbacks(mUpdateOomAdjRunnable);
        mH.post(mUpdateOomAdjRunnable);
    }

    void updateCpuStats() {
        mH.post(mAmInternal::updateCpuStats);
    }

    void updateBatteryStats(ActivityRecord component, boolean resumed) {
        final Message m = PooledLambda.obtainMessage(ActivityManagerInternal::updateBatteryStats,
                mAmInternal, component.mActivityComponent, component.app.mUid, component.mUserId,
                resumed);
        mH.sendMessage(m);
    }

    void updateActivityUsageStats(ActivityRecord activity, int event) {
        ComponentName taskRoot = null;
        final Task task = activity.getTask();
        if (task != null) {
            final ActivityRecord rootActivity = task.getRootActivity();
            if (rootActivity != null) {
                taskRoot = rootActivity.mActivityComponent;
            }
        }

        final Message m = PooledLambda.obtainMessage(
                ActivityManagerInternal::updateActivityUsageStats, mAmInternal,
                activity.mActivityComponent, activity.mUserId, event, activity.appToken, taskRoot);
        mH.sendMessage(m);
    }

    void startProcessAsync(ActivityRecord activity, boolean knownToBeDead, boolean isTop,
            String hostingType) {
        try {
            if (Trace.isTagEnabled(TRACE_TAG_WINDOW_MANAGER)) {
                Trace.traceBegin(TRACE_TAG_WINDOW_MANAGER, "dispatchingStartProcess:"
                        + activity.processName);
            }
            // Post message to start process to avoid possible deadlock of calling into AMS with the
            // ATMS lock held.
            final Message m = PooledLambda.obtainMessage(ActivityManagerInternal::startProcess,
                    mAmInternal, activity.processName, activity.info.applicationInfo, knownToBeDead,
                    isTop, hostingType, activity.intent.getComponent());
            mH.sendMessage(m);
        } finally {
            Trace.traceEnd(TRACE_TAG_WINDOW_MANAGER);
        }
    }

    void setBooting(boolean booting) {
        mAmInternal.setBooting(booting);
    }

    boolean isBooting() {
        return mAmInternal.isBooting();
    }

    void setBooted(boolean booted) {
        mAmInternal.setBooted(booted);
    }

    boolean isBooted() {
        return mAmInternal.isBooted();
    }

    void postFinishBooting(boolean finishBooting, boolean enableScreen) {
        mH.post(() -> {
            if (finishBooting) {
                mAmInternal.finishBooting();
            }
            if (enableScreen) {
                mInternal.enableScreenAfterBoot(isBooted());
            }
        });
    }

    void setHeavyWeightProcess(ActivityRecord root) {
        mHeavyWeightProcess = root.app;
        final Message m = PooledLambda.obtainMessage(
                ActivityTaskManagerService::postHeavyWeightProcessNotification, this,
                root.app, root.intent, root.mUserId);
        mH.sendMessage(m);
    }

    void clearHeavyWeightProcessIfEquals(WindowProcessController proc) {
        if (mHeavyWeightProcess == null || mHeavyWeightProcess != proc) {
            return;
        }

        mHeavyWeightProcess = null;
        final Message m = PooledLambda.obtainMessage(
                ActivityTaskManagerService::cancelHeavyWeightProcessNotification, this,
                proc.mUserId);
        mH.sendMessage(m);
    }

    private void cancelHeavyWeightProcessNotification(int userId) {
        final INotificationManager inm = NotificationManager.getService();
        if (inm == null) {
            return;
        }
        try {
            inm.cancelNotificationWithTag("android", "android", null,
                    SystemMessage.NOTE_HEAVY_WEIGHT_NOTIFICATION, userId);
        } catch (RuntimeException e) {
            Slog.w(TAG, "Error canceling notification for service", e);
        } catch (RemoteException e) {
        }

    }

    private void postHeavyWeightProcessNotification(
            WindowProcessController proc, Intent intent, int userId) {
        if (proc == null) {
            return;
        }

        final INotificationManager inm = NotificationManager.getService();
        if (inm == null) {
            return;
        }

        try {
            Context context = mContext.createPackageContext(proc.mInfo.packageName, 0);
            String text = mContext.getString(R.string.heavy_weight_notification,
                    context.getApplicationInfo().loadLabel(context.getPackageManager()));
            Notification notification =
                    new Notification.Builder(context,
                            SystemNotificationChannels.HEAVY_WEIGHT_APP)
                            .setSmallIcon(com.android.internal.R.drawable.stat_sys_adb)
                            .setWhen(0)
                            .setOngoing(true)
                            .setTicker(text)
                            .setColor(mContext.getColor(
                                    com.android.internal.R.color.system_notification_accent_color))
                            .setContentTitle(text)
                            .setContentText(
                                    mContext.getText(R.string.heavy_weight_notification_detail))
                            .setContentIntent(PendingIntent.getActivityAsUser(mContext, 0,
                                    intent, PendingIntent.FLAG_CANCEL_CURRENT, null,
                                    new UserHandle(userId)))
                            .build();
            try {
                inm.enqueueNotificationWithTag("android", "android", null,
                        SystemMessage.NOTE_HEAVY_WEIGHT_NOTIFICATION, notification, userId);
            } catch (RuntimeException e) {
                Slog.w(TAG, "Error showing notification for heavy-weight app", e);
            } catch (RemoteException e) {
            }
        } catch (PackageManager.NameNotFoundException e) {
            Slog.w(TAG, "Unable to create context for heavy notification", e);
        }

    }

    IIntentSender getIntentSenderLocked(int type, String packageName, String featureId,
            int callingUid, int userId, IBinder token, String resultWho, int requestCode,
            Intent[] intents, String[] resolvedTypes, int flags, Bundle bOptions) {

        ActivityRecord activity = null;
        if (type == ActivityManager.INTENT_SENDER_ACTIVITY_RESULT) {
            activity = ActivityRecord.isInStackLocked(token);
            if (activity == null) {
                Slog.w(TAG, "Failed createPendingResult: activity " + token + " not in any stack");
                return null;
            }
            if (activity.finishing) {
                Slog.w(TAG, "Failed createPendingResult: activity " + activity + " is finishing");
                return null;
            }
        }

        final PendingIntentRecord rec = mPendingIntentController.getIntentSender(type, packageName,
                featureId, callingUid, userId, token, resultWho, requestCode, intents,
                resolvedTypes, flags, bOptions);
        final boolean noCreate = (flags & PendingIntent.FLAG_NO_CREATE) != 0;
        if (noCreate) {
            return rec;
        }
        if (type == ActivityManager.INTENT_SENDER_ACTIVITY_RESULT) {
            if (activity.pendingResults == null) {
                activity.pendingResults = new HashSet<>();
            }
            activity.pendingResults.add(rec.ref);
        }
        return rec;
    }

    // TODO(b/111541062): Update app time tracking to make it aware of multiple resumed activities
    private void startTimeTrackingFocusedActivityLocked() {
        final ActivityRecord resumedActivity = mRootWindowContainer.getTopResumedActivity();
        if (!mSleeping && mCurAppTimeTracker != null && resumedActivity != null) {
            mCurAppTimeTracker.start(resumedActivity.packageName);
        }
    }

    private void updateResumedAppTrace(@Nullable ActivityRecord resumed) {
        if (mTracedResumedActivity != null) {
            Trace.asyncTraceEnd(TRACE_TAG_WINDOW_MANAGER,
                    constructResumedTraceName(mTracedResumedActivity.packageName), 0);
        }
        if (resumed != null) {
            Trace.asyncTraceBegin(TRACE_TAG_WINDOW_MANAGER,
                    constructResumedTraceName(resumed.packageName), 0);
        }
        mTracedResumedActivity = resumed;
    }

    private String constructResumedTraceName(String packageName) {
        return "focused app: " + packageName;
    }

    /** Applies latest configuration and/or visibility updates if needed. */
    boolean ensureConfigAndVisibilityAfterUpdate(ActivityRecord starting, int changes) {
        boolean kept = true;
        final ActivityStack mainStack = mRootWindowContainer.getTopDisplayFocusedStack();
        // mainStack is null during startup.
        if (mainStack != null) {
            if (changes != 0 && starting == null) {
                // If the configuration changed, and the caller is not already
                // in the process of starting an activity, then find the top
                // activity to check if its configuration needs to change.
                starting = mainStack.topRunningActivity();
            }

            if (starting != null) {
                kept = starting.ensureActivityConfiguration(changes,
                        false /* preserveWindow */);
                // And we need to make sure at this point that all other activities
                // are made visible with the correct configuration.
                mRootWindowContainer.ensureActivitiesVisible(starting, changes,
                        !PRESERVE_WINDOWS);
            }
        }

        return kept;
    }

    void scheduleAppGcsLocked() {
        mH.post(() -> mAmInternal.scheduleAppGcs());
    }

    CompatibilityInfo compatibilityInfoForPackageLocked(ApplicationInfo ai) {
        return mCompatModePackages.compatibilityInfoForPackageLocked(ai);
    }

    /**
     * Returns the PackageManager. Used by classes hosted by {@link ActivityTaskManagerService}. The
     * PackageManager could be unavailable at construction time and therefore needs to be accessed
     * on demand.
     */
    IPackageManager getPackageManager() {
        return AppGlobals.getPackageManager();
    }

    PackageManagerInternal getPackageManagerInternalLocked() {
        if (mPmInternal == null) {
            mPmInternal = LocalServices.getService(PackageManagerInternal.class);
        }
        return mPmInternal;
    }

    PermissionPolicyInternal getPermissionPolicyInternal() {
        if (mPermissionPolicyInternal == null) {
            mPermissionPolicyInternal = LocalServices.getService(PermissionPolicyInternal.class);
        }
        return mPermissionPolicyInternal;
    }

    AppWarnings getAppWarningsLocked() {
        return mAppWarnings;
    }

    Intent getHomeIntent() {
        Intent intent = new Intent(mTopAction, mTopData != null ? Uri.parse(mTopData) : null);
        intent.setComponent(mTopComponent);
        intent.addFlags(Intent.FLAG_DEBUG_TRIAGED_MISSING);
        if (mFactoryTest != FactoryTest.FACTORY_TEST_LOW_LEVEL) {
            intent.addCategory(Intent.CATEGORY_HOME);
        }
        return intent;
    }

    /**
     * Return the intent set with {@link Intent#CATEGORY_SECONDARY_HOME} to resolve secondary home
     * activities.
     *
     * @param preferredPackage Specify a preferred package name, otherwise use secondary home
     *                        component defined in config_secondaryHomeComponent.
     * @return the intent set with {@link Intent#CATEGORY_SECONDARY_HOME}
     */
    Intent getSecondaryHomeIntent(String preferredPackage) {
        final Intent intent = new Intent(mTopAction, mTopData != null ? Uri.parse(mTopData) : null);
        final boolean useSystemProvidedLauncher = mContext.getResources().getBoolean(
                com.android.internal.R.bool.config_useSystemProvidedLauncherForSecondary);
        if (preferredPackage == null || useSystemProvidedLauncher) {
            // Using the component stored in config if no package name or forced.
            final String secondaryHomeComponent = mContext.getResources().getString(
                    com.android.internal.R.string.config_secondaryHomeComponent);
            intent.setComponent(ComponentName.unflattenFromString(secondaryHomeComponent));
        } else {
            intent.setPackage(preferredPackage);
        }
        intent.addFlags(Intent.FLAG_DEBUG_TRIAGED_MISSING);
        if (mFactoryTest != FactoryTest.FACTORY_TEST_LOW_LEVEL) {
            intent.addCategory(Intent.CATEGORY_SECONDARY_HOME);
        }
        return intent;
    }

    ApplicationInfo getAppInfoForUser(ApplicationInfo info, int userId) {
        if (info == null) return null;
        ApplicationInfo newInfo = new ApplicationInfo(info);
        newInfo.initForUser(userId);
        return newInfo;
    }

    WindowProcessController getProcessController(String processName, int uid) {
        if (uid == SYSTEM_UID) {
            // The system gets to run in any process. If there are multiple processes with the same
            // uid, just pick the first (this should never happen).
            final SparseArray<WindowProcessController> procs =
                    mProcessNames.getMap().get(processName);
            if (procs == null) return null;
            final int procCount = procs.size();
            for (int i = 0; i < procCount; i++) {
                final int procUid = procs.keyAt(i);
                if (UserHandle.isApp(procUid) || !UserHandle.isSameUser(procUid, uid)) {
                    // Don't use an app process or different user process for system component.
                    continue;
                }
                return procs.valueAt(i);
            }
        }

        return mProcessNames.get(processName, uid);
    }

    WindowProcessController getProcessController(IApplicationThread thread) {
        if (thread == null) {
            return null;
        }

        final IBinder threadBinder = thread.asBinder();
        final ArrayMap<String, SparseArray<WindowProcessController>> pmap = mProcessNames.getMap();
        for (int i = pmap.size()-1; i >= 0; i--) {
            final SparseArray<WindowProcessController> procs = pmap.valueAt(i);
            for (int j = procs.size() - 1; j >= 0; j--) {
                final WindowProcessController proc = procs.valueAt(j);
                if (proc.hasThread() && proc.getThread().asBinder() == threadBinder) {
                    return proc;
                }
            }
        }

        return null;
    }

    WindowProcessController getProcessController(int pid, int uid) {
        final WindowProcessController proc = mProcessMap.getProcess(pid);
        if (proc == null) return null;
        if (UserHandle.isApp(uid) && proc.mUid == uid) {
            return proc;
        }
        return null;
    }

    int getUidState(int uid) {
        return mActiveUids.getUidState(uid);
    }

    boolean isUidForeground(int uid) {
        // A uid is considered to be foreground if it has a visible non-toast window.
        return mWindowManager.mRoot.isAnyNonToastWindowVisibleForUid(uid);
    }

    boolean isDeviceOwner(int uid) {
        return uid >= 0 && mDeviceOwnerUid == uid;
    }

    void setDeviceOwnerUid(int uid) {
        mDeviceOwnerUid = uid;
    }

    /**
     * @return whitelist tag for a uid from mPendingTempWhitelist, null if not currently on
     * the whitelist
     */
    String getPendingTempWhitelistTagForUidLocked(int uid) {
        return mPendingTempWhitelist.get(uid);
    }

    void logAppTooSlow(WindowProcessController app, long startTime, String msg) {
        if (true || Build.IS_USER) {
            return;
        }

        StrictMode.ThreadPolicy oldPolicy = StrictMode.allowThreadDiskReads();
        StrictMode.allowThreadDiskWrites();
        try {
            File tracesDir = new File("/data/anr");
            File tracesFile = null;
            try {
                tracesFile = File.createTempFile("app_slow", null, tracesDir);

                StringBuilder sb = new StringBuilder();
                String timeString =
                        TimeMigrationUtils.formatMillisWithFixedFormat(System.currentTimeMillis());
                sb.append(timeString);
                sb.append(": ");
                TimeUtils.formatDuration(SystemClock.uptimeMillis()-startTime, sb);
                sb.append(" since ");
                sb.append(msg);
                FileOutputStream fos = new FileOutputStream(tracesFile);
                fos.write(sb.toString().getBytes());
                if (app == null) {
                    fos.write("\n*** No application process!".getBytes());
                }
                fos.close();
                FileUtils.setPermissions(tracesFile.getPath(), 0666, -1, -1); // -rw-rw-rw-
            } catch (IOException e) {
                Slog.w(TAG, "Unable to prepare slow app traces file: " + tracesFile, e);
                return;
            }

            if (app != null && app.getPid() > 0) {
                ArrayList<Integer> firstPids = new ArrayList<Integer>();
                firstPids.add(app.getPid());
                dumpStackTraces(tracesFile.getAbsolutePath(), firstPids, null, null);
            }

            File lastTracesFile = null;
            File curTracesFile = null;
            for (int i=9; i>=0; i--) {
                String name = String.format(Locale.US, "slow%02d.txt", i);
                curTracesFile = new File(tracesDir, name);
                if (curTracesFile.exists()) {
                    if (lastTracesFile != null) {
                        curTracesFile.renameTo(lastTracesFile);
                    } else {
                        curTracesFile.delete();
                    }
                }
                lastTracesFile = curTracesFile;
            }
            tracesFile.renameTo(curTracesFile);
        } finally {
            StrictMode.setThreadPolicy(oldPolicy);
        }
    }

    boolean isAssociatedCompanionApp(int userId, int uid) {
        final Set<Integer> allUids = mCompanionAppUidsMap.get(userId);
        if (allUids == null) {
            return false;
        }
        return allUids.contains(uid);
    }

    void notifySingleTaskDisplayEmpty(int displayId) {
        mTaskChangeNotificationController.notifySingleTaskDisplayEmpty(displayId);
    }

    final class H extends Handler {
        static final int REPORT_TIME_TRACKER_MSG = 1;


        static final int FIRST_ACTIVITY_STACK_MSG = 100;
        static final int FIRST_SUPERVISOR_STACK_MSG = 200;

        H(Looper looper) {
            super(looper);
        }

        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case REPORT_TIME_TRACKER_MSG: {
                    AppTimeTracker tracker = (AppTimeTracker) msg.obj;
                    tracker.deliverResult(mContext);
                } break;
            }
        }
    }

    final class UiHandler extends Handler {
        static final int DISMISS_DIALOG_UI_MSG = 1;

        public UiHandler() {
            super(UiThread.get().getLooper(), null, true);
        }

        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case DISMISS_DIALOG_UI_MSG: {
                    final Dialog d = (Dialog) msg.obj;
                    d.dismiss();
                    break;
                }
            }
        }
    }

    final class LocalService extends ActivityTaskManagerInternal {
        @Override
        public SleepToken acquireSleepToken(String tag, int displayId) {
            Objects.requireNonNull(tag);
            return ActivityTaskManagerService.this.acquireSleepToken(tag, displayId);
        }

        @Override
        public ComponentName getHomeActivityForUser(int userId) {
            synchronized (mGlobalLock) {
                final ActivityRecord homeActivity =
                        mRootWindowContainer.getDefaultDisplayHomeActivityForUser(userId);
                return homeActivity == null ? null : homeActivity.mActivityComponent;
            }
        }

        @Override
        public void onLocalVoiceInteractionStarted(IBinder activity,
                IVoiceInteractionSession voiceSession, IVoiceInteractor voiceInteractor) {
            synchronized (mGlobalLock) {
                onLocalVoiceInteractionStartedLocked(activity, voiceSession, voiceInteractor);
            }
        }

        @Override
        public void notifySingleTaskDisplayDrawn(int displayId) {
            mTaskChangeNotificationController.notifySingleTaskDisplayDrawn(displayId);
        }

        @Override
        public void notifyAppTransitionFinished() {
            synchronized (mGlobalLock) {
                mStackSupervisor.notifyAppTransitionDone();
            }
        }

        @Override
        public void notifyAppTransitionCancelled() {
            synchronized (mGlobalLock) {
                mStackSupervisor.notifyAppTransitionDone();
            }
        }

        @Override
        public List<IBinder> getTopVisibleActivities() {
            synchronized (mGlobalLock) {
                return mRootWindowContainer.getTopVisibleActivities();
            }
        }

        @Override
        public void notifyDockedStackMinimizedChanged(boolean minimized) {
            synchronized (mGlobalLock) {
                mRootWindowContainer.setDockedStackMinimized(minimized);
            }
        }

        @Override
        public int startActivitiesAsPackage(String packageName, @Nullable String featureId,
                int userId, Intent[] intents, Bundle bOptions) {
            Objects.requireNonNull(intents, "intents");
            final String[] resolvedTypes = new String[intents.length];

            // UID of the package on user userId.
            // "= 0" is needed because otherwise catch(RemoteException) would make it look like
            // packageUid may not be initialized.
            int packageUid = 0;
            final long ident = Binder.clearCallingIdentity();

            try {
                for (int i = 0; i < intents.length; i++) {
                    resolvedTypes[i] =
                            intents[i].resolveTypeIfNeeded(mContext.getContentResolver());
                }

                packageUid = AppGlobals.getPackageManager().getPackageUid(
                        packageName, PackageManager.MATCH_DEBUG_TRIAGED_MISSING, userId);
            } catch (RemoteException e) {
                // Shouldn't happen.
            } finally {
                Binder.restoreCallingIdentity(ident);
            }

            return getActivityStartController().startActivitiesInPackage(
                    packageUid, packageName, featureId,
                    intents, resolvedTypes, null /* resultTo */,
                    SafeActivityOptions.fromBundle(bOptions), userId,
                    false /* validateIncomingUser */, null /* originatingPendingIntent */,
                    false /* allowBackgroundActivityStart */);
        }

        @Override
        public int startActivitiesInPackage(int uid, int realCallingPid, int realCallingUid,
                String callingPackage, @Nullable String callingFeatureId, Intent[] intents,
                String[] resolvedTypes, IBinder resultTo, SafeActivityOptions options, int userId,
                boolean validateIncomingUser, PendingIntentRecord originatingPendingIntent,
                boolean allowBackgroundActivityStart) {
            assertPackageMatchesCallingUid(callingPackage);
            synchronized (mGlobalLock) {
                return getActivityStartController().startActivitiesInPackage(uid, realCallingPid,
                        realCallingUid, callingPackage, callingFeatureId, intents, resolvedTypes,
                        resultTo, options, userId, validateIncomingUser, originatingPendingIntent,
                        allowBackgroundActivityStart);
            }
        }

        @Override
        public int startActivityInPackage(int uid, int realCallingPid, int realCallingUid,
                String callingPackage, @Nullable String callingFeatureId, Intent intent,
                String resolvedType, IBinder resultTo, String resultWho, int requestCode,
                int startFlags, SafeActivityOptions options, int userId, Task inTask, String reason,
                boolean validateIncomingUser, PendingIntentRecord originatingPendingIntent,
                boolean allowBackgroundActivityStart) {
            assertPackageMatchesCallingUid(callingPackage);
            synchronized (mGlobalLock) {
                return getActivityStartController().startActivityInPackage(uid, realCallingPid,
                        realCallingUid, callingPackage, callingFeatureId, intent, resolvedType,
                        resultTo, resultWho, requestCode, startFlags, options, userId, inTask,
                        reason, validateIncomingUser, originatingPendingIntent,
                        allowBackgroundActivityStart);
            }
        }

        @Override
        public int startActivityAsUser(IApplicationThread caller, String callerPackage,
                @Nullable String callerFeatureId, Intent intent, @Nullable IBinder resultTo,
                int startFlags, Bundle options, int userId) {
            return ActivityTaskManagerService.this.startActivityAsUser(
                    caller, callerPackage, callerFeatureId, intent,
                    intent.resolveTypeIfNeeded(mContext.getContentResolver()),
                    resultTo, null, 0, startFlags, null, options, userId,
                    false /*validateIncomingUser*/);
        }

        @Override
        public void notifyKeyguardFlagsChanged(@Nullable Runnable callback, int displayId) {
            synchronized (mGlobalLock) {

                // We might change the visibilities here, so prepare an empty app transition which
                // might be overridden later if we actually change visibilities.
                final DisplayContent displayContent =
                        mRootWindowContainer.getDisplayContent(displayId);
                if (displayContent == null) {
                    return;
                }
                final DisplayContent dc = displayContent.mDisplayContent;
                final boolean wasTransitionSet =
                        dc.mAppTransition.getAppTransition() != TRANSIT_NONE;
                if (!wasTransitionSet) {
                    dc.prepareAppTransition(TRANSIT_NONE, false /* alwaysKeepCurrent */);
                }
                mRootWindowContainer.ensureActivitiesVisible(null, 0, !PRESERVE_WINDOWS);

                // If there was a transition set already we don't want to interfere with it as we
                // might be starting it too early.
                if (!wasTransitionSet) {
                    dc.executeAppTransition();
                }
            }
            if (callback != null) {
                callback.run();
            }
        }

        @Override
        public void notifyKeyguardTrustedChanged() {
            synchronized (mGlobalLock) {
                if (mKeyguardController.isKeyguardShowing(DEFAULT_DISPLAY)) {
                    mRootWindowContainer.ensureActivitiesVisible(null, 0, !PRESERVE_WINDOWS);
                }
            }
        }

        /**
         * Called after virtual display Id is updated by
         * {@link com.android.server.vr.Vr2dDisplay} with a specific
         * {@param vrVr2dDisplayId}.
         */
        @Override
        public void setVr2dDisplayId(int vr2dDisplayId) {
            if (DEBUG_STACK) Slog.d(TAG, "setVr2dDisplayId called for: " + vr2dDisplayId);
            synchronized (mGlobalLock) {
                mVr2dDisplayId = vr2dDisplayId;
            }
        }

        @Override
        public void setFocusedActivity(IBinder token) {
            synchronized (mGlobalLock) {
                final ActivityRecord r = ActivityRecord.forTokenLocked(token);
                if (r == null) {
                    throw new IllegalArgumentException(
                            "setFocusedActivity: No activity record matching token=" + token);
                }
                if (r.moveFocusableActivityToTop("setFocusedActivity")) {
                    mRootWindowContainer.resumeFocusedStacksTopActivities();
                }
            }
        }

        @Override
        public void registerScreenObserver(ScreenObserver observer) {
            mScreenObservers.add(observer);
        }

        @Override
        public boolean isCallerRecents(int callingUid) {
            return getRecentTasks().isCallerRecents(callingUid);
        }

        @Override
        public boolean isRecentsComponentHomeActivity(int userId) {
            return getRecentTasks().isRecentsComponentHomeActivity(userId);
        }

        @Override
        public void cancelRecentsAnimation(boolean restoreHomeStackPosition) {
            ActivityTaskManagerService.this.cancelRecentsAnimation(restoreHomeStackPosition);
        }

        @Override
        public void enforceCallerIsRecentsOrHasPermission(String permission, String func) {
            ActivityTaskManagerService.this.enforceCallerIsRecentsOrHasPermission(permission, func);
        }

        @Override
        public void notifyActiveVoiceInteractionServiceChanged(ComponentName component) {
            synchronized (mGlobalLock) {
                mActiveVoiceInteractionServiceComponent = component;
            }
        }

        @Override
        public void setAllowAppSwitches(@NonNull String type, int uid, int userId) {
            if (!mAmInternal.isUserRunning(userId, ActivityManager.FLAG_OR_STOPPED)) {
                return;
            }
            synchronized (mGlobalLock) {
                ArrayMap<String, Integer> types = mAllowAppSwitchUids.get(userId);
                if (types == null) {
                    if (uid < 0) {
                        return;
                    }
                    types = new ArrayMap<>();
                    mAllowAppSwitchUids.put(userId, types);
                }
                if (uid < 0) {
                    types.remove(type);
                } else {
                    types.put(type, uid);
                }
            }
        }

        @Override
        public void onUserStopped(int userId) {
            synchronized (mGlobalLock) {
                getRecentTasks().unloadUserDataFromMemoryLocked(userId);
                mAllowAppSwitchUids.remove(userId);
            }
        }

        @Override
        public boolean isGetTasksAllowed(String caller, int callingPid, int callingUid) {
            synchronized (mGlobalLock) {
                return ActivityTaskManagerService.this.isGetTasksAllowed(
                        caller, callingPid, callingUid);
            }
        }

        @HotPath(caller = HotPath.PROCESS_CHANGE)
        @Override
        public void onProcessAdded(WindowProcessController proc) {
            synchronized (mGlobalLockWithoutBoost) {
                mProcessNames.put(proc.mName, proc.mUid, proc);
            }
        }

        @HotPath(caller = HotPath.PROCESS_CHANGE)
        @Override
        public void onProcessRemoved(String name, int uid) {
            synchronized (mGlobalLockWithoutBoost) {
                mProcessNames.remove(name, uid);
            }
        }

        @HotPath(caller = HotPath.PROCESS_CHANGE)
        @Override
        public void onCleanUpApplicationRecord(WindowProcessController proc) {
            synchronized (mGlobalLockWithoutBoost) {
                if (proc == mHomeProcess) {
                    mHomeProcess = null;
                }
                if (proc == mPreviousProcess) {
                    mPreviousProcess = null;
                }
            }
        }

        @HotPath(caller = HotPath.OOM_ADJUSTMENT)
        @Override
        public int getTopProcessState() {
            synchronized (mGlobalLockWithoutBoost) {
                return mTopProcessState;
            }
        }

        @HotPath(caller = HotPath.OOM_ADJUSTMENT)
        @Override
        public boolean isHeavyWeightProcess(WindowProcessController proc) {
            synchronized (mGlobalLockWithoutBoost) {
                return proc == mHeavyWeightProcess;
            }
        }

        @HotPath(caller = HotPath.PROCESS_CHANGE)
        @Override
        public void clearHeavyWeightProcessIfEquals(WindowProcessController proc) {
            synchronized (mGlobalLockWithoutBoost) {
                ActivityTaskManagerService.this.clearHeavyWeightProcessIfEquals(proc);
            }
        }

        @Override
        public void finishHeavyWeightApp() {
            synchronized (mGlobalLock) {
                if (mHeavyWeightProcess != null) {
                    mHeavyWeightProcess.finishActivities();
                }
                ActivityTaskManagerService.this.clearHeavyWeightProcessIfEquals(
                        mHeavyWeightProcess);
            }
        }

        @HotPath(caller = HotPath.OOM_ADJUSTMENT)
        @Override
        public boolean isSleeping() {
            synchronized (mGlobalLockWithoutBoost) {
                return isSleepingLocked();
            }
        }

        @Override
        public boolean isShuttingDown() {
            synchronized (mGlobalLock) {
                return mShuttingDown;
            }
        }

        @Override
        public boolean shuttingDown(boolean booted, int timeout) {
            synchronized (mGlobalLock) {
                mShuttingDown = true;
                mRootWindowContainer.prepareForShutdown();
                updateEventDispatchingLocked(booted);
                notifyTaskPersisterLocked(null, true);
                return mStackSupervisor.shutdownLocked(timeout);
            }
        }

        @Override
        public void enableScreenAfterBoot(boolean booted) {
            synchronized (mGlobalLock) {
                writeBootProgressEnableScreen(SystemClock.uptimeMillis());
                mWindowManager.enableScreenAfterBoot();
                updateEventDispatchingLocked(booted);
            }
        }

        @Override
        public boolean showStrictModeViolationDialog() {
            synchronized (mGlobalLock) {
                return mShowDialogs && !mSleeping && !mShuttingDown;
            }
        }

        @Override
        public void showSystemReadyErrorDialogsIfNeeded() {
            synchronized (mGlobalLock) {
                try {
                    if (AppGlobals.getPackageManager().hasSystemUidErrors()) {
                        Slog.e(TAG, "UIDs on the system are inconsistent, you need to wipe your"
                                + " data partition or your device will be unstable.");
                        mUiHandler.post(() -> {
                            if (mShowDialogs) {
                                AlertDialog d = new BaseErrorDialog(mUiContext);
                                d.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ERROR);
                                d.setCancelable(false);
                                d.setTitle(mUiContext.getText(R.string.android_system_label));
                                d.setMessage(mUiContext.getText(R.string.system_error_wipe_data));
                                d.setButton(DialogInterface.BUTTON_POSITIVE,
                                        mUiContext.getText(R.string.ok),
                                        mUiHandler.obtainMessage(DISMISS_DIALOG_UI_MSG, d));
                                d.show();
                            }
                        });
                    }
                } catch (RemoteException e) {
                }

                if (!Build.isBuildConsistent()) {
                    Slog.e(TAG, "Build fingerprint is not consistent, warning user");
                    mUiHandler.post(() -> {
                        if (mShowDialogs) {
                            AlertDialog d = new BaseErrorDialog(mUiContext);
                            d.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ERROR);
                            d.setCancelable(false);
                            d.setTitle(mUiContext.getText(R.string.android_system_label));
                            d.setMessage(mUiContext.getText(R.string.system_error_manufacturer));
                            d.setButton(DialogInterface.BUTTON_POSITIVE,
                                    mUiContext.getText(R.string.ok),
                                    mUiHandler.obtainMessage(DISMISS_DIALOG_UI_MSG, d));
                            d.show();
                        }
                    });
                }
            }
        }

        @Override
        public void onProcessMapped(int pid, WindowProcessController proc) {
            synchronized (mGlobalLock) {
                mProcessMap.put(pid, proc);
            }
        }

        @Override
        public void onProcessUnMapped(int pid) {
            synchronized (mGlobalLock) {
                mProcessMap.remove(pid);
            }
        }

        @Override
        public void onPackageDataCleared(String name) {
            synchronized (mGlobalLock) {
                mCompatModePackages.handlePackageDataClearedLocked(name);
                mAppWarnings.onPackageDataCleared(name);
            }
        }

        @Override
        public void onPackageUninstalled(String name) {
            synchronized (mGlobalLock) {
                mAppWarnings.onPackageUninstalled(name);
                mCompatModePackages.handlePackageUninstalledLocked(name);
            }
        }

        @Override
        public void onPackageAdded(String name, boolean replacing) {
            synchronized (mGlobalLock) {
                mCompatModePackages.handlePackageAddedLocked(name, replacing);
            }
        }

        @Override
        public void onPackageReplaced(ApplicationInfo aInfo) {
            synchronized (mGlobalLock) {
                mRootWindowContainer.updateActivityApplicationInfo(aInfo);
            }
        }

        @Override
        public CompatibilityInfo compatibilityInfoForPackage(ApplicationInfo ai) {
            synchronized (mGlobalLock) {
                return compatibilityInfoForPackageLocked(ai);
            }
        }

        /**
         * Set the corresponding display information for the process global configuration. To be
         * called when we need to show IME on a different display.
         *
         * @param pid The process id associated with the IME window.
         * @param displayId The ID of the display showing the IME.
         */
        @Override
        public void onImeWindowSetOnDisplay(final int pid, final int displayId) {
            // Don't update process-level configuration for Multi-Client IME process since other
            // IMEs on other displays will also receive this configuration change due to IME
            // services use the same application config/context.
            if (InputMethodSystemProperty.MULTI_CLIENT_IME_ENABLED) return;

            if (pid == MY_PID || pid < 0) {
                if (DEBUG_CONFIGURATION) {
                    Slog.w(TAG,
                            "Trying to update display configuration for system/invalid process.");
                }
                return;
            }
            synchronized (mGlobalLock) {
                final DisplayContent displayContent =
                        mRootWindowContainer.getDisplayContent(displayId);
                if (displayContent == null) {
                    // Call might come when display is not yet added or has been removed.
                    if (DEBUG_CONFIGURATION) {
                        Slog.w(TAG, "Trying to update display configuration for non-existing "
                                + "displayId=" + displayId);
                    }
                    return;
                }
                final WindowProcessController process = mProcessMap.getProcess(pid);
                if (process == null) {
                    if (DEBUG_CONFIGURATION) {
                        Slog.w(TAG, "Trying to update display configuration for invalid "
                                + "process, pid=" + pid);
                    }
                    return;
                }
                process.mIsImeProcess = true;
                process.registerDisplayConfigurationListener(displayContent);
            }
        }

        @Override
        public void sendActivityResult(int callingUid, IBinder activityToken, String resultWho,
                int requestCode, int resultCode, Intent data) {
            synchronized (mGlobalLock) {
                final ActivityRecord r = ActivityRecord.isInStackLocked(activityToken);
                if (r != null && r.getRootTask() != null) {
                    r.sendResult(callingUid, resultWho, requestCode, resultCode, data);
                }
            }
        }

        @Override
        public void clearPendingResultForActivity(IBinder activityToken,
                WeakReference<PendingIntentRecord> pir) {
            synchronized (mGlobalLock) {
                final ActivityRecord r = ActivityRecord.isInStackLocked(activityToken);
                if (r != null && r.pendingResults != null) {
                    r.pendingResults.remove(pir);
                }
            }
        }

        @Override
        public ActivityTokens getTopActivityForTask(int taskId) {
            synchronized (mGlobalLock) {
                final Task task = mRootWindowContainer.anyTaskForId(taskId);
                if (task == null) {
                    Slog.w(TAG, "getApplicationThreadForTopActivity failed:"
                            + " Requested task not found");
                    return null;
                }
                final ActivityRecord activity = task.getTopNonFinishingActivity();
                if (activity == null) {
                    Slog.w(TAG, "getApplicationThreadForTopActivity failed:"
                            + " Requested activity not found");
                    return null;
                }
                if (!activity.attachedToProcess()) {
                    Slog.w(TAG, "getApplicationThreadForTopActivity failed: No process for "
                            + activity);
                    return null;
                }
                return new ActivityTokens(activity.appToken, activity.assistToken,
                        activity.app.getThread());
            }
        }

        @Override
        public IIntentSender getIntentSender(int type, String packageName,
                @Nullable String featureId, int callingUid, int userId, IBinder token,
                String resultWho, int requestCode, Intent[] intents, String[] resolvedTypes,
                int flags, Bundle bOptions) {
            synchronized (mGlobalLock) {
                return getIntentSenderLocked(type, packageName, featureId, callingUid, userId,
                        token, resultWho, requestCode, intents, resolvedTypes, flags, bOptions);
            }
        }

        @Override
        public ActivityServiceConnectionsHolder getServiceConnectionsHolder(IBinder token) {
            synchronized (mGlobalLock) {
                final ActivityRecord r = ActivityRecord.isInStackLocked(token);
                if (r == null) {
                    return null;
                }
                if (r.mServiceConnectionsHolder == null) {
                    r.mServiceConnectionsHolder = new ActivityServiceConnectionsHolder(
                            ActivityTaskManagerService.this, r);
                }

                return r.mServiceConnectionsHolder;
            }
        }

        @Override
        public Intent getHomeIntent() {
            synchronized (mGlobalLock) {
                return ActivityTaskManagerService.this.getHomeIntent();
            }
        }

        @Override
        public boolean startHomeActivity(int userId, String reason) {
            synchronized (mGlobalLock) {
                return mRootWindowContainer.startHomeOnDisplay(userId, reason, DEFAULT_DISPLAY);
            }
        }

        @Override
        public boolean startHomeOnDisplay(int userId, String reason, int displayId,
                boolean allowInstrumenting, boolean fromHomeKey) {
            synchronized (mGlobalLock) {
                return mRootWindowContainer.startHomeOnDisplay(userId, reason, displayId,
                        allowInstrumenting, fromHomeKey);
            }
        }

        @Override
        public boolean startHomeOnAllDisplays(int userId, String reason) {
            synchronized (mGlobalLock) {
                return mRootWindowContainer.startHomeOnAllDisplays(userId, reason);
            }
        }

        @HotPath(caller = HotPath.PROCESS_CHANGE)
        @Override
        public boolean isFactoryTestProcess(WindowProcessController wpc) {
            synchronized (mGlobalLockWithoutBoost) {
                if (mFactoryTest == FACTORY_TEST_OFF) {
                    return false;
                }
                if (mFactoryTest == FACTORY_TEST_LOW_LEVEL && mTopComponent != null
                        && wpc.mName.equals(mTopComponent.getPackageName())) {
                    return true;
                }
                return mFactoryTest == FACTORY_TEST_HIGH_LEVEL
                        && (wpc.mInfo.flags & FLAG_FACTORY_TEST) != 0;
            }
        }

        @Override
        public void updateTopComponentForFactoryTest() {
            synchronized (mGlobalLock) {
                if (mFactoryTest != FACTORY_TEST_LOW_LEVEL) {
                    return;
                }
                final ResolveInfo ri = mContext.getPackageManager()
                        .resolveActivity(new Intent(Intent.ACTION_FACTORY_TEST), STOCK_PM_FLAGS);
                final CharSequence errorMsg;
                if (ri != null) {
                    final ActivityInfo ai = ri.activityInfo;
                    final ApplicationInfo app = ai.applicationInfo;
                    if ((app.flags & ApplicationInfo.FLAG_SYSTEM) != 0) {
                        mTopAction = Intent.ACTION_FACTORY_TEST;
                        mTopData = null;
                        mTopComponent = new ComponentName(app.packageName, ai.name);
                        errorMsg = null;
                    } else {
                        errorMsg = mContext.getResources().getText(
                                com.android.internal.R.string.factorytest_not_system);
                    }
                } else {
                    errorMsg = mContext.getResources().getText(
                            com.android.internal.R.string.factorytest_no_action);
                }
                if (errorMsg == null) {
                    return;
                }

                mTopAction = null;
                mTopData = null;
                mTopComponent = null;
                mUiHandler.post(() -> {
                    Dialog d = new FactoryErrorDialog(mUiContext, errorMsg);
                    d.show();
                    mAmInternal.ensureBootCompleted();
                });
            }
        }

        @HotPath(caller = HotPath.PROCESS_CHANGE)
        @Override
        public void handleAppDied(WindowProcessController wpc, boolean restarting,
                Runnable finishInstrumentationCallback) {
            synchronized (mGlobalLockWithoutBoost) {
                // Remove this application's activities from active lists.
                boolean hasVisibleActivities = mRootWindowContainer.handleAppDied(wpc);

                wpc.clearRecentTasks();
                wpc.clearActivities();

                if (wpc.isInstrumenting()) {
                    finishInstrumentationCallback.run();
                }

                if (!restarting && hasVisibleActivities) {
                    deferWindowLayout();
                    try {
                        if (!mRootWindowContainer.resumeFocusedStacksTopActivities()) {
                            // If there was nothing to resume, and we are not already restarting
                            // this process, but there is a visible activity that is hosted by the
                            // process...then make sure all visible activities are running, taking
                            // care of restarting this process.
                            mRootWindowContainer.ensureActivitiesVisible(null, 0,
                                    !PRESERVE_WINDOWS);
                        }
                    } finally {
                        continueWindowLayout();
                    }
                }
            }
        }

        @Override
        public void closeSystemDialogs(String reason) {
            enforceNotIsolatedCaller("closeSystemDialogs");

            final int pid = Binder.getCallingPid();
            final int uid = Binder.getCallingUid();
            final long origId = Binder.clearCallingIdentity();
            try {
                synchronized (mGlobalLock) {
                    // Only allow this from foreground processes, so that background
                    // applications can't abuse it to prevent system UI from being shown.
                    if (uid >= FIRST_APPLICATION_UID) {
                        final WindowProcessController proc = mProcessMap.getProcess(pid);
                        if (!proc.isPerceptible()) {
                            Slog.w(TAG, "Ignoring closeSystemDialogs " + reason
                                    + " from background process " + proc);
                            return;
                        }
                    }
                    mWindowManager.closeSystemDialogs(reason);

                    mRootWindowContainer.closeSystemDialogs();
                }
                // Call into AM outside the synchronized block.
                mAmInternal.broadcastCloseSystemDialogs(reason);
            } finally {
                Binder.restoreCallingIdentity(origId);
            }
        }

        @Override
        public void cleanupDisabledPackageComponents(
                String packageName, Set<String> disabledClasses, int userId, boolean booted) {
            synchronized (mGlobalLock) {
                // Clean-up disabled activities.
                if (mRootWindowContainer.finishDisabledPackageActivities(
                        packageName, disabledClasses, true, false, userId) && booted) {
                    mRootWindowContainer.resumeFocusedStacksTopActivities();
                    mStackSupervisor.scheduleIdle();
                }

                // Clean-up disabled tasks
                getRecentTasks().cleanupDisabledPackageTasksLocked(
                        packageName, disabledClasses, userId);
            }
        }

        @Override
        public boolean onForceStopPackage(String packageName, boolean doit, boolean evenPersistent,
                int userId) {
            synchronized (mGlobalLock) {

                boolean didSomething =
                        getActivityStartController().clearPendingActivityLaunches(packageName);
                didSomething |= mRootWindowContainer.finishDisabledPackageActivities(packageName,
                        null, doit, evenPersistent, userId);
                return didSomething;
            }
        }

        @Override
        public void resumeTopActivities(boolean scheduleIdle) {
            synchronized (mGlobalLock) {
                mRootWindowContainer.resumeFocusedStacksTopActivities();
                if (scheduleIdle) {
                    mStackSupervisor.scheduleIdle();
                }
            }
        }

        @HotPath(caller = HotPath.PROCESS_CHANGE)
        @Override
        public void preBindApplication(WindowProcessController wpc) {
            synchronized (mGlobalLockWithoutBoost) {
                mStackSupervisor.getActivityMetricsLogger().notifyBindApplication(wpc.mInfo);
            }
        }

        @HotPath(caller = HotPath.PROCESS_CHANGE)
        @Override
        public boolean attachApplication(WindowProcessController wpc) throws RemoteException {
            synchronized (mGlobalLockWithoutBoost) {
                if (Trace.isTagEnabled(TRACE_TAG_WINDOW_MANAGER)) {
                    Trace.traceBegin(TRACE_TAG_WINDOW_MANAGER, "attachApplication:" + wpc.mName);
                }
                try {
                    return mRootWindowContainer.attachApplication(wpc);
                } finally {
                    Trace.traceEnd(TRACE_TAG_WINDOW_MANAGER);
                }
            }
        }

        @Override
        public void notifyLockedProfile(@UserIdInt int userId, int currentUserId) {
            try {
                if (!AppGlobals.getPackageManager().isUidPrivileged(Binder.getCallingUid())) {
                    throw new SecurityException("Only privileged app can call notifyLockedProfile");
                }
            } catch (RemoteException ex) {
                throw new SecurityException("Fail to check is caller a privileged app", ex);
            }

            synchronized (mGlobalLock) {
                final long ident = Binder.clearCallingIdentity();
                try {
                    if (mAmInternal.shouldConfirmCredentials(userId)) {
                        if (mKeyguardController.isKeyguardLocked()) {
                            // Showing launcher to avoid user entering credential twice.
                            startHomeActivity(currentUserId, "notifyLockedProfile");
                        }
                        mRootWindowContainer.lockAllProfileTasks(userId);
                    }
                } finally {
                    Binder.restoreCallingIdentity(ident);
                }
            }
        }

        @Override
        public void startConfirmDeviceCredentialIntent(Intent intent, Bundle options) {
            mAmInternal.enforceCallingPermission(
                    MANAGE_ACTIVITY_STACKS, "startConfirmDeviceCredentialIntent");

            synchronized (mGlobalLock) {
                final long ident = Binder.clearCallingIdentity();
                try {
                    intent.addFlags(FLAG_ACTIVITY_NEW_TASK | FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
                    final ActivityOptions activityOptions = options != null
                            ? new ActivityOptions(options) : ActivityOptions.makeBasic();
                    mContext.startActivityAsUser(intent, activityOptions.toBundle(),
                            UserHandle.CURRENT);
                } finally {
                    Binder.restoreCallingIdentity(ident);
                }
            }
        }

        @Override
        public void writeActivitiesToProto(ProtoOutputStream proto) {
            synchronized (mGlobalLock) {
                // The output proto of "activity --proto activities"
                mRootWindowContainer.dumpDebug(
                        proto, ROOT_WINDOW_CONTAINER, WindowTraceLogLevel.ALL);
            }
        }

        @Override
        public void saveANRState(String reason) {
            synchronized (mGlobalLock) {
                final StringWriter sw = new StringWriter();
                final PrintWriter pw = new FastPrintWriter(sw, false, 1024);
                pw.println("  ANR time: " + DateFormat.getDateTimeInstance().format(new Date()));
                if (reason != null) {
                    pw.println("  Reason: " + reason);
                }
                pw.println();
                getActivityStartController().dump(pw, "  ", null);
                pw.println();
                pw.println("-------------------------------------------------------------------------------");
                dumpActivitiesLocked(null /* fd */, pw, null /* args */, 0 /* opti */,
                        true /* dumpAll */, false /* dumpClient */, null /* dumpPackage */,
                        "" /* header */);
                pw.println();
                pw.close();

                mLastANRState = sw.toString();
            }
        }

        @Override
        public void clearSavedANRState() {
            synchronized (mGlobalLock) {
                mLastANRState = null;
            }
        }

        @Override
        public void dump(String cmd, FileDescriptor fd, PrintWriter pw, String[] args, int opti,
                boolean dumpAll, boolean dumpClient, String dumpPackage) {
            synchronized (mGlobalLock) {
                if (DUMP_ACTIVITIES_CMD.equals(cmd) || DUMP_ACTIVITIES_SHORT_CMD.equals(cmd)) {
                    dumpActivitiesLocked(fd, pw, args, opti, dumpAll, dumpClient, dumpPackage);
                } else if (DUMP_LASTANR_CMD.equals(cmd)) {
                    dumpLastANRLocked(pw);
                } else if (DUMP_LASTANR_TRACES_CMD.equals(cmd)) {
                    dumpLastANRTracesLocked(pw);
                } else if (DUMP_STARTER_CMD.equals(cmd)) {
                    dumpActivityStarterLocked(pw, dumpPackage);
                } else if (DUMP_CONTAINERS_CMD.equals(cmd)) {
                    dumpActivityContainersLocked(pw);
                } else if (DUMP_RECENTS_CMD.equals(cmd) || DUMP_RECENTS_SHORT_CMD.equals(cmd)) {
                    if (getRecentTasks() != null) {
                        getRecentTasks().dump(pw, dumpAll, dumpPackage);
                    }
                }
            }
        }

        @Override
        public boolean dumpForProcesses(FileDescriptor fd, PrintWriter pw, boolean dumpAll,
                String dumpPackage, int dumpAppId, boolean needSep, boolean testPssMode,
                int wakefulness) {
            synchronized (mGlobalLock) {
                if (mHomeProcess != null && (dumpPackage == null
                        || mHomeProcess.mPkgList.contains(dumpPackage))) {
                    if (needSep) {
                        pw.println();
                        needSep = false;
                    }
                    pw.println("  mHomeProcess: " + mHomeProcess);
                }
                if (mPreviousProcess != null && (dumpPackage == null
                        || mPreviousProcess.mPkgList.contains(dumpPackage))) {
                    if (needSep) {
                        pw.println();
                        needSep = false;
                    }
                    pw.println("  mPreviousProcess: " + mPreviousProcess);
                }
                if (dumpAll && (mPreviousProcess == null || dumpPackage == null
                        || mPreviousProcess.mPkgList.contains(dumpPackage))) {
                    StringBuilder sb = new StringBuilder(128);
                    sb.append("  mPreviousProcessVisibleTime: ");
                    TimeUtils.formatDuration(mPreviousProcessVisibleTime, sb);
                    pw.println(sb);
                }
                if (mHeavyWeightProcess != null && (dumpPackage == null
                        || mHeavyWeightProcess.mPkgList.contains(dumpPackage))) {
                    if (needSep) {
                        pw.println();
                        needSep = false;
                    }
                    pw.println("  mHeavyWeightProcess: " + mHeavyWeightProcess);
                }
                if (dumpPackage == null) {
                    pw.println("  mGlobalConfiguration: " + getGlobalConfiguration());
                    mRootWindowContainer.dumpDisplayConfigs(pw, "  ");
                }
                if (dumpAll) {
                    if (dumpPackage == null) {
                        pw.println("  mConfigWillChange: "
                                + getTopDisplayFocusedStack().mConfigWillChange);
                    }
                    if (mCompatModePackages.getPackages().size() > 0) {
                        boolean printed = false;
                        for (Map.Entry<String, Integer> entry
                                : mCompatModePackages.getPackages().entrySet()) {
                            String pkg = entry.getKey();
                            int mode = entry.getValue();
                            if (dumpPackage != null && !dumpPackage.equals(pkg)) {
                                continue;
                            }
                            if (!printed) {
                                pw.println("  mScreenCompatPackages:");
                                printed = true;
                            }
                            pw.println("    " + pkg + ": " + mode);
                        }
                    }
                }

                if (dumpPackage == null) {
                    pw.println("  mWakefulness="
                            + PowerManagerInternal.wakefulnessToString(wakefulness));
                    pw.println("  mSleepTokens=" + mRootWindowContainer.mSleepTokens);
                    if (mRunningVoice != null) {
                        pw.println("  mRunningVoice=" + mRunningVoice);
                        pw.println("  mVoiceWakeLock" + mVoiceWakeLock);
                    }
                    pw.println("  mSleeping=" + mSleeping);
                    pw.println("  mShuttingDown=" + mShuttingDown + " mTestPssMode=" + testPssMode);
                    pw.println("  mVrController=" + mVrController);
                }
                if (mCurAppTimeTracker != null) {
                    mCurAppTimeTracker.dumpWithHeader(pw, "  ", true);
                }
                if (mAllowAppSwitchUids.size() > 0) {
                    boolean printed = false;
                    for (int i = 0; i < mAllowAppSwitchUids.size(); i++) {
                        ArrayMap<String, Integer> types = mAllowAppSwitchUids.valueAt(i);
                        for (int j = 0; j < types.size(); j++) {
                            if (dumpPackage == null ||
                                    UserHandle.getAppId(types.valueAt(j).intValue()) == dumpAppId) {
                                if (needSep) {
                                    pw.println();
                                    needSep = false;
                                }
                                if (!printed) {
                                    pw.println("  mAllowAppSwitchUids:");
                                    printed = true;
                                }
                                pw.print("    User ");
                                pw.print(mAllowAppSwitchUids.keyAt(i));
                                pw.print(": Type ");
                                pw.print(types.keyAt(j));
                                pw.print(" = ");
                                UserHandle.formatUid(pw, types.valueAt(j).intValue());
                                pw.println();
                            }
                        }
                    }
                }
                if (dumpPackage == null) {
                    if (mController != null) {
                        pw.println("  mController=" + mController
                                + " mControllerIsAMonkey=" + mControllerIsAMonkey);
                    }
                    pw.println("  mGoingToSleepWakeLock=" + mStackSupervisor.mGoingToSleepWakeLock);
                    pw.println("  mLaunchingActivityWakeLock="
                            + mStackSupervisor.mLaunchingActivityWakeLock);
                }

                return needSep;
            }
        }

        @Override
        public void writeProcessesToProto(ProtoOutputStream proto, String dumpPackage,
                int wakeFullness, boolean testPssMode) {
            synchronized (mGlobalLock) {
                if (dumpPackage == null) {
                    getGlobalConfiguration().dumpDebug(proto, GLOBAL_CONFIGURATION);
                    proto.write(CONFIG_WILL_CHANGE, getTopDisplayFocusedStack().mConfigWillChange);
                    writeSleepStateToProto(proto, wakeFullness, testPssMode);
                    if (mRunningVoice != null) {
                        final long vrToken = proto.start(
                                ActivityManagerServiceDumpProcessesProto.RUNNING_VOICE);
                        proto.write(ActivityManagerServiceDumpProcessesProto.Voice.SESSION,
                                mRunningVoice.toString());
                        mVoiceWakeLock.dumpDebug(
                                proto, ActivityManagerServiceDumpProcessesProto.Voice.WAKELOCK);
                        proto.end(vrToken);
                    }
                    mVrController.dumpDebug(proto,
                            ActivityManagerServiceDumpProcessesProto.VR_CONTROLLER);
                    if (mController != null) {
                        final long token = proto.start(CONTROLLER);
                        proto.write(ActivityManagerServiceDumpProcessesProto.Controller.CONTROLLER,
                                mController.toString());
                        proto.write(IS_A_MONKEY, mControllerIsAMonkey);
                        proto.end(token);
                    }
                    mStackSupervisor.mGoingToSleepWakeLock.dumpDebug(proto, GOING_TO_SLEEP);
                    mStackSupervisor.mLaunchingActivityWakeLock.dumpDebug(proto,
                            LAUNCHING_ACTIVITY);
                }

                if (mHomeProcess != null && (dumpPackage == null
                        || mHomeProcess.mPkgList.contains(dumpPackage))) {
                    mHomeProcess.dumpDebug(proto, HOME_PROC);
                }

                if (mPreviousProcess != null && (dumpPackage == null
                        || mPreviousProcess.mPkgList.contains(dumpPackage))) {
                    mPreviousProcess.dumpDebug(proto, PREVIOUS_PROC);
                    proto.write(PREVIOUS_PROC_VISIBLE_TIME_MS, mPreviousProcessVisibleTime);
                }

                if (mHeavyWeightProcess != null && (dumpPackage == null
                        || mHeavyWeightProcess.mPkgList.contains(dumpPackage))) {
                    mHeavyWeightProcess.dumpDebug(proto, HEAVY_WEIGHT_PROC);
                }

                for (Map.Entry<String, Integer> entry
                        : mCompatModePackages.getPackages().entrySet()) {
                    String pkg = entry.getKey();
                    int mode = entry.getValue();
                    if (dumpPackage == null || dumpPackage.equals(pkg)) {
                        long compatToken = proto.start(SCREEN_COMPAT_PACKAGES);
                        proto.write(PACKAGE, pkg);
                        proto.write(MODE, mode);
                        proto.end(compatToken);
                    }
                }

                if (mCurAppTimeTracker != null) {
                    mCurAppTimeTracker.dumpDebug(proto, CURRENT_TRACKER, true);
                }

            }
        }

        @Override
        public boolean dumpActivity(FileDescriptor fd, PrintWriter pw, String name,
                String[] args, int opti, boolean dumpAll, boolean dumpVisibleStacksOnly,
                boolean dumpFocusedStackOnly) {
            return ActivityTaskManagerService.this.dumpActivity(fd, pw, name, args, opti, dumpAll,
                    dumpVisibleStacksOnly, dumpFocusedStackOnly);
        }

        @Override
        public void dumpForOom(PrintWriter pw) {
            synchronized (mGlobalLock) {
                pw.println("  mHomeProcess: " + mHomeProcess);
                pw.println("  mPreviousProcess: " + mPreviousProcess);
                if (mHeavyWeightProcess != null) {
                    pw.println("  mHeavyWeightProcess: " + mHeavyWeightProcess);
                }
            }
        }

        @Override
        public boolean canGcNow() {
            synchronized (mGlobalLock) {
                return isSleeping() || mRootWindowContainer.allResumedActivitiesIdle();
            }
        }

        @HotPath(caller = HotPath.OOM_ADJUSTMENT)
        @Override
        public WindowProcessController getTopApp() {
            synchronized (mGlobalLockWithoutBoost) {
                if (mRootWindowContainer == null) {
                    // Return null if mRootWindowContainer not yet initialize, while update
                    // oomadj after AMS created.
                    return null;
                }
                final ActivityRecord top = mRootWindowContainer.getTopResumedActivity();
                return top != null ? top.app : null;
            }
        }

        @HotPath(caller = HotPath.OOM_ADJUSTMENT)
        @Override
        public void rankTaskLayersIfNeeded() {
            synchronized (mGlobalLockWithoutBoost) {
                if (mRootWindowContainer != null) {
                    mRootWindowContainer.rankTaskLayersIfNeeded();
                }
            }
        }

        @Override
        public void scheduleDestroyAllActivities(String reason) {
            synchronized (mGlobalLock) {
                mRootWindowContainer.scheduleDestroyAllActivities(reason);
            }
        }

        @Override
        public void removeUser(int userId) {
            synchronized (mGlobalLock) {
                mRootWindowContainer.removeUser(userId);
            }
        }

        @Override
        public boolean switchUser(int userId, UserState userState) {
            synchronized (mGlobalLock) {
                return mRootWindowContainer.switchUser(userId, userState);
            }
        }

        @Override
        public void onHandleAppCrash(WindowProcessController wpc) {
            synchronized (mGlobalLock) {
                mRootWindowContainer.handleAppCrash(wpc);
            }
        }

        @Override
        public int finishTopCrashedActivities(WindowProcessController crashedApp, String reason) {
            synchronized (mGlobalLock) {
                return mRootWindowContainer.finishTopCrashedActivities(crashedApp, reason);
            }
        }

        @HotPath(caller = HotPath.OOM_ADJUSTMENT)
        @Override
        public void onUidActive(int uid, int procState) {
            mActiveUids.onUidActive(uid, procState);
        }

        @HotPath(caller = HotPath.OOM_ADJUSTMENT)
        @Override
        public void onUidInactive(int uid) {
            mActiveUids.onUidInactive(uid);
        }

        @HotPath(caller = HotPath.OOM_ADJUSTMENT)
        @Override
        public void onActiveUidsCleared() {
            mActiveUids.onActiveUidsCleared();
        }

        @HotPath(caller = HotPath.OOM_ADJUSTMENT)
        @Override
        public void onUidProcStateChanged(int uid, int procState) {
            mActiveUids.onUidProcStateChanged(uid, procState);
        }

        @Override
        public void onUidAddedToPendingTempWhitelist(int uid, String tag) {
            synchronized (mGlobalLockWithoutBoost) {
                mPendingTempWhitelist.put(uid, tag);
            }
        }

        @Override
        public void onUidRemovedFromPendingTempWhitelist(int uid) {
            synchronized (mGlobalLockWithoutBoost) {
                mPendingTempWhitelist.remove(uid);
            }
        }

        @Override
        public boolean handleAppCrashInActivityController(String processName, int pid,
                String shortMsg, String longMsg, long timeMillis, String stackTrace,
                Runnable killCrashingAppCallback) {
            synchronized (mGlobalLock) {
                if (mController == null) {
                    return false;
                }

                try {
                    if (!mController.appCrashed(processName, pid, shortMsg, longMsg, timeMillis,
                            stackTrace)) {
                        killCrashingAppCallback.run();
                        return true;
                    }
                } catch (RemoteException e) {
                    mController = null;
                    Watchdog.getInstance().setActivityController(null);
                }
                return false;
            }
        }

        @Override
        public void removeRecentTasksByPackageName(String packageName, int userId) {
            synchronized (mGlobalLock) {
                mRecentTasks.removeTasksByPackageName(packageName, userId);
            }
        }

        @Override
        public void cleanupRecentTasksForUser(int userId) {
            synchronized (mGlobalLock) {
                mRecentTasks.cleanupLocked(userId);
            }
        }

        @Override
        public void loadRecentTasksForUser(int userId) {
            synchronized (mGlobalLock) {
                mRecentTasks.loadUserRecentsLocked(userId);
            }
        }

        @Override
        public void onPackagesSuspendedChanged(String[] packages, boolean suspended, int userId) {
            synchronized (mGlobalLock) {
                mRecentTasks.onPackagesSuspendedChanged(packages, suspended, userId);
            }
        }

        @Override
        public void flushRecentTasks() {
            mRecentTasks.flush();
        }

        @Override
        public WindowProcessController getHomeProcess() {
            synchronized (mGlobalLock) {
                return mHomeProcess;
            }
        }

        @Override
        public WindowProcessController getPreviousProcess() {
            synchronized (mGlobalLock) {
                return mPreviousProcess;
            }
        }

        @Override
        public void clearLockedTasks(String reason) {
            synchronized (mGlobalLock) {
                getLockTaskController().clearLockedTasks(reason);
            }
        }

        @Override
        public void updateUserConfiguration() {
            synchronized (mGlobalLock) {
                final Configuration configuration = new Configuration(getGlobalConfiguration());
                final int currentUserId = mAmInternal.getCurrentUserId();
                Settings.System.adjustConfigurationForUser(mContext.getContentResolver(),
                        configuration, currentUserId, Settings.System.canWrite(mContext));
                updateConfigurationLocked(configuration, null /* starting */,
                        false /* initLocale */, false /* persistent */, currentUserId,
                        false /* deferResume */);
            }
        }

        @Override
        public boolean canShowErrorDialogs() {
            synchronized (mGlobalLock) {
                return mShowDialogs && !mSleeping && !mShuttingDown
                        && !mKeyguardController.isKeyguardOrAodShowing(DEFAULT_DISPLAY)
                        && !hasUserRestriction(UserManager.DISALLOW_SYSTEM_ERROR_DIALOGS,
                        mAmInternal.getCurrentUserId())
                        && !(UserManager.isDeviceInDemoMode(mContext)
                        && mAmInternal.getCurrentUser().isDemo());
            }
        }

        @Override
        public void setProfileApp(String profileApp) {
            synchronized (mGlobalLock) {
                mProfileApp = profileApp;
            }
        }

        @Override
        public void setProfileProc(WindowProcessController wpc) {
            synchronized (mGlobalLock) {
                mProfileProc = wpc;
            }
        }

        @Override
        public void setProfilerInfo(ProfilerInfo profilerInfo) {
            synchronized (mGlobalLock) {
                mProfilerInfo = profilerInfo;
            }
        }

        @Override
        public ActivityMetricsLaunchObserverRegistry getLaunchObserverRegistry() {
            synchronized (mGlobalLock) {
                return mStackSupervisor.getActivityMetricsLogger().getLaunchObserverRegistry();
            }
        }

        @Override
        public ActivityManager.TaskSnapshot getTaskSnapshotNoRestore(int taskId,
                boolean isLowResolution) {
            return ActivityTaskManagerService.this.getTaskSnapshot(taskId, isLowResolution,
                    false /* restoreFromDisk */);
        }

        @Override
        public boolean isUidForeground(int uid) {
            synchronized (mGlobalLock) {
                return ActivityTaskManagerService.this.isUidForeground(uid);
            }
        }

        @Override
        public void setDeviceOwnerUid(int uid) {
            synchronized (mGlobalLock) {
                ActivityTaskManagerService.this.setDeviceOwnerUid(uid);
            }
        }

        @Override
        public void setCompanionAppPackages(int userId, Set<String> companionAppPackages) {
            // Translate package names into UIDs
            final Set<Integer> result = new HashSet<>();
            for (String pkg : companionAppPackages) {
                final int uid = getPackageManagerInternalLocked().getPackageUid(pkg, 0, userId);
                if (uid >= 0) {
                    result.add(uid);
                }
            }
            synchronized (mGlobalLock) {
                mCompanionAppUidsMap.put(userId, result);
            }
        }
    }
}