services/core/java/com/android/server/am/ProcessRecord.java

/*
 * Copyright (C) 2006 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.am;

import static android.app.ActivityManager.PROCESS_STATE_NONEXISTENT;

import static com.android.server.Watchdog.NATIVE_STACKS_OF_INTEREST;
import static com.android.server.am.ActivityManagerDebugConfig.DEBUG_ANR;
import static com.android.server.am.ActivityManagerDebugConfig.TAG_AM;
import static com.android.server.am.ActivityManagerDebugConfig.TAG_WITH_CLASS_NAME;
import static com.android.server.am.ActivityManagerService.MY_PID;

import android.app.ActivityManager;
import android.app.ApplicationErrorReport;
import android.app.Dialog;
import android.app.IApplicationThread;
import android.content.ComponentName;
import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.res.CompatibilityInfo;
import android.os.Binder;
import android.os.Debug;
import android.os.IBinder;
import android.os.Message;
import android.os.Process;
import android.os.RemoteException;
import android.os.SystemClock;
import android.os.Trace;
import android.os.UserHandle;
import android.provider.Settings;
import android.server.ServerProtoEnums;
import android.util.ArrayMap;
import android.util.ArraySet;
import android.util.DebugUtils;
import android.util.EventLog;
import android.util.Slog;
import android.util.SparseArray;
import android.util.StatsLog;
import android.util.TimeUtils;
import android.util.proto.ProtoOutputStream;

import com.android.internal.app.procstats.ProcessState;
import com.android.internal.app.procstats.ProcessStats;
import com.android.internal.os.BatteryStatsImpl;
import com.android.internal.os.ProcessCpuTracker;
import com.android.internal.os.Zygote;
import com.android.server.wm.WindowProcessController;
import com.android.server.wm.WindowProcessListener;

import java.io.File;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Arrays;

/**
 * Full information about a particular process that
 * is currently running.
 */
final class ProcessRecord implements WindowProcessListener {
    private static final String TAG = TAG_WITH_CLASS_NAME ? "ProcessRecord" : TAG_AM;

    private final ActivityManagerService mService; // where we came from
    final ApplicationInfo info; // all about the first app in the process
    final boolean isolated;     // true if this is a special isolated process
    final int uid;              // uid of process; may be different from 'info' if isolated
    final int userId;           // user of process.
    final String processName;   // name of the process
    // List of packages running in the process
    final PackageList pkgList = new PackageList();
    final class PackageList {
        final ArrayMap<String, ProcessStats.ProcessStateHolder> mPkgList = new ArrayMap<>();

        ProcessStats.ProcessStateHolder put(String key, ProcessStats.ProcessStateHolder value) {
            mWindowProcessController.addPackage(key);
            return mPkgList.put(key, value);
        }

        void clear() {
            mPkgList.clear();
            mWindowProcessController.clearPackageList();
        }

        int size() {
            return mPkgList.size();
        }

        String keyAt(int index) {
            return mPkgList.keyAt(index);
        }

        public ProcessStats.ProcessStateHolder valueAt(int index) {
            return mPkgList.valueAt(index);
        }

        ProcessStats.ProcessStateHolder get(String pkgName) {
            return mPkgList.get(pkgName);
        }

        boolean containsKey(Object key) {
            return mPkgList.containsKey(key);
        }
    }

    final ProcessList.ProcStateMemTracker procStateMemTracker
            = new ProcessList.ProcStateMemTracker();
    UidRecord uidRecord;        // overall state of process's uid.
    ArraySet<String> pkgDeps;   // additional packages we have a dependency on
    IApplicationThread thread;  // the actual proc...  may be null only if
                                // 'persistent' is true (in which case we
                                // are in the process of launching the app)
    ProcessState baseProcessTracker;
    BatteryStatsImpl.Uid.Proc curProcBatteryStats;
    int pid;                    // The process of this application; 0 if none
    String procStatFile;        // path to /proc/<pid>/stat
    int[] gids;                 // The gids this process was launched with
    private String mRequiredAbi;// The ABI this process was launched with
    String instructionSet;      // The instruction set this process was launched with
    boolean starting;           // True if the process is being started
    long lastActivityTime;      // For managing the LRU list
    long lastPssTime;           // Last time we retrieved PSS data
    long nextPssTime;           // Next time we want to request PSS data
    long lastStateTime;         // Last time setProcState changed
    long initialIdlePss;        // Initial memory pss of process for idle maintenance.
    long lastPss;               // Last computed memory pss.
    long lastSwapPss;           // Last computed SwapPss.
    long lastCachedPss;         // Last computed pss when in cached state.
    long lastCachedSwapPss;     // Last computed SwapPss when in cached state.
    int maxAdj;                 // Maximum OOM adjustment for this process
    private int mCurRawAdj;     // Current OOM unlimited adjustment for this process
    int setRawAdj;              // Last set OOM unlimited adjustment for this process
    int curAdj;                 // Current OOM adjustment for this process
    int setAdj;                 // Last set OOM adjustment for this process
    int verifiedAdj;            // The last adjustment that was verified as actually being set
    private int mCurSchedGroup; // Currently desired scheduling class
    int setSchedGroup;          // Last set to background scheduling class
    int trimMemoryLevel;        // Last selected memory trimming level
    private int mCurProcState = PROCESS_STATE_NONEXISTENT; // Currently computed process state
    private int mRepProcState = PROCESS_STATE_NONEXISTENT; // Last reported process state
    int setProcState = PROCESS_STATE_NONEXISTENT; // Last set process state in process tracker
    int pssProcState = PROCESS_STATE_NONEXISTENT; // Currently requesting pss for
    int pssStatType;            // The type of stat collection that we are currently requesting
    int savedPriority;          // Previous priority value if we're switching to non-SCHED_OTHER
    int renderThreadTid;        // TID for RenderThread
    boolean serviceb;           // Process currently is on the service B list
    boolean serviceHighRam;     // We are forcing to service B list due to its RAM use
    boolean notCachedSinceIdle; // Has this process not been in a cached state since last idle?
    private boolean mHasClientActivities;  // Are there any client services with activities?
    boolean hasStartedServices; // Are there any started services running in this process?
    private boolean mHasForegroundServices; // Running any services that are foreground?
    private boolean mHasForegroundActivities; // Running any activities that are foreground?
    boolean repForegroundActivities; // Last reported foreground activities.
    boolean systemNoUi;         // This is a system process, but not currently showing UI.
    boolean hasShownUi;         // Has UI been shown in this process since it was started?
    private boolean mHasTopUi;  // Is this process currently showing a non-activity UI that the user
                                // is interacting with? E.g. The status bar when it is expanded, but
                                // not when it is minimized. When true the
                                // process will be set to use the ProcessList#SCHED_GROUP_TOP_APP
                                // scheduling group to boost performance.
    private boolean mHasOverlayUi; // Is the process currently showing a non-activity UI that
                                // overlays on-top of activity UIs on screen. E.g. display a window
                                // of type
                                // android.view.WindowManager.LayoutParams#TYPE_APPLICATION_OVERLAY
                                // When true the process will oom adj score will be set to
                                // ProcessList#PERCEPTIBLE_APP_ADJ at minimum to reduce the chance
                                // of the process getting killed.
    boolean runningRemoteAnimation; // Is the process currently running a RemoteAnimation? When true
                                // the process will be set to use the
                                // ProcessList#SCHED_GROUP_TOP_APP scheduling group to boost
                                // performance, as well as oom adj score will be set to
                                // ProcessList#VISIBLE_APP_ADJ at minimum to reduce the chance
                                // of the process getting killed.
    private boolean mPendingUiClean; // Want to clean up resources from showing UI?
    boolean hasAboveClient;     // Bound using BIND_ABOVE_CLIENT, so want to be lower
    boolean treatLikeActivity;  // Bound using BIND_TREAT_LIKE_ACTIVITY
    boolean bad;                // True if disabled in the bad process list
    boolean killedByAm;         // True when proc has been killed by activity manager, not for RAM
    boolean killed;             // True once we know the process has been killed
    boolean procStateChanged;   // Keep track of whether we changed 'setAdj'.
    boolean reportedInteraction;// Whether we have told usage stats about it being an interaction
    boolean unlocked;           // True when proc was started in user unlocked state
    private long mInteractionEventTime; // The time we sent the last interaction event
    private long mFgInteractionTime; // When we became foreground for interaction purposes
    String waitingToKill;       // Process is waiting to be killed when in the bg, and reason
    Object forcingToImportant;  // Token that is forcing this process to be important
    int adjSeq;                 // Sequence id for identifying oom_adj assignment cycles
    int completedAdjSeq;        // Sequence id for identifying oom_adj assignment cycles
    boolean containsCycle;      // Whether this app has encountered a cycle in the most recent update
    int lruSeq;                 // Sequence id for identifying LRU update cycles
    CompatibilityInfo compat;   // last used compatibility mode
    IBinder.DeathRecipient deathRecipient; // Who is watching for the death.
    private ActiveInstrumentation mInstr; // Set to currently active instrumentation running in
                                          // process.
    private boolean mUsingWrapper; // Set to true when process was launched with a wrapper attached
    final ArraySet<BroadcastRecord> curReceivers = new ArraySet<BroadcastRecord>();// receivers currently running in the app
    private long mWhenUnimportant; // When (uptime) the process last became unimportant
    long lastCpuTime;           // How long proc has run CPU at last check
    long curCpuTime;            // How long proc has run CPU most recently
    long lastRequestedGc;       // When we last asked the app to do a gc
    long lastLowMemory;         // When we last told the app that memory is low
    long lastProviderTime;      // The last time someone else was using a provider in this process.
    long lastTopTime;           // The last time the process was in the TOP state or greater.
    boolean reportLowMemory;    // Set to true when waiting to report low mem
    boolean empty;              // Is this an empty background process?
    boolean cached;             // Is this a cached process?
    String adjType;             // Debugging: primary thing impacting oom_adj.
    int adjTypeCode;            // Debugging: adj code to report to app.
    Object adjSource;           // Debugging: option dependent object.
    int adjSourceProcState;     // Debugging: proc state of adjSource's process.
    Object adjTarget;           // Debugging: target component impacting oom_adj.
    Runnable crashHandler;      // Optional local handler to be invoked in the process crash.

    // Cache of last retrieve memory info and uptime, to throttle how frequently
    // apps can requyest it.
    Debug.MemoryInfo lastMemInfo;
    long lastMemInfoTime;

    // Controller for driving the process state on the window manager side.
    final private WindowProcessController mWindowProcessController;
    // all ServiceRecord running in this process
    final ArraySet<ServiceRecord> services = new ArraySet<>();
    // services that are currently executing code (need to remain foreground).
    final ArraySet<ServiceRecord> executingServices = new ArraySet<>();
    // All ConnectionRecord this process holds
    final ArraySet<ConnectionRecord> connections = new ArraySet<>();
    // all IIntentReceivers that are registered from this process.
    final ArraySet<ReceiverList> receivers = new ArraySet<>();
    // class (String) -> ContentProviderRecord
    final ArrayMap<String, ContentProviderRecord> pubProviders = new ArrayMap<>();
    // All ContentProviderRecord process is using
    final ArrayList<ContentProviderConnection> conProviders = new ArrayList<>();

    String isolatedEntryPoint;  // Class to run on start if this is a special isolated process.
    String[] isolatedEntryPointArgs; // Arguments to pass to isolatedEntryPoint's main().

    boolean execServicesFg;     // do we need to be executing services in the foreground?
    private boolean mPersistent;// always keep this application running?
    private boolean mCrashing;  // are we in the process of crashing?
    Dialog crashDialog;         // dialog being displayed due to crash.
    boolean forceCrashReport;   // suppress normal auto-dismiss of crash dialog & report UI?
    private boolean mNotResponding; // does the app have a not responding dialog?
    Dialog anrDialog;           // dialog being displayed due to app not resp.
    boolean removed;            // has app package been removed from device?
    private boolean mDebugging; // was app launched for debugging?
    boolean waitedForDebugger;  // has process show wait for debugger dialog?
    Dialog waitDialog;          // current wait for debugger dialog

    String shortStringName;     // caching of toShortString() result.
    String stringName;          // caching of toString() result.
    boolean pendingStart;       // Process start is pending.
    long startSeq;              // Seq no. indicating the latest process start associated with
                                // this process record.
    int mountMode;              // Indicates how the external storage was mounted for this process.

    // These reports are generated & stored when an app gets into an error condition.
    // They will be "null" when all is OK.
    ActivityManager.ProcessErrorStateInfo crashingReport;
    ActivityManager.ProcessErrorStateInfo notRespondingReport;

    // Who will be notified of the error. This is usually an activity in the
    // app that installed the package.
    ComponentName errorReportReceiver;

    // Process is currently hosting a backup agent for backup or restore
    public boolean inFullBackup;
    // App is allowed to manage whitelists such as temporary Power Save mode whitelist.
    boolean whitelistManager;

    // Params used in starting this process.
    String hostingType;
    String hostingNameStr;
    String seInfo;
    long startTime;
    // This will be same as {@link #uid} usually except for some apps used during factory testing.
    int startUid;

    void setStartParams(int startUid, String hostingType, String hostingNameStr, String seInfo,
            long startTime) {
        this.startUid = startUid;
        this.hostingType = hostingType;
        this.hostingNameStr = hostingNameStr;
        this.seInfo = seInfo;
        this.startTime = startTime;
    }

    void dump(PrintWriter pw, String prefix) {
        final long nowUptime = SystemClock.uptimeMillis();

        pw.print(prefix); pw.print("user #"); pw.print(userId);
                pw.print(" uid="); pw.print(info.uid);
        if (uid != info.uid) {
            pw.print(" ISOLATED uid="); pw.print(uid);
        }
        pw.print(" gids={");
        if (gids != null) {
            for (int gi=0; gi<gids.length; gi++) {
                if (gi != 0) pw.print(", ");
                pw.print(gids[gi]);

            }
        }
        pw.println("}");
        pw.print(prefix); pw.print("mRequiredAbi="); pw.print(mRequiredAbi);
                pw.print(" instructionSet="); pw.println(instructionSet);
        if (info.className != null) {
            pw.print(prefix); pw.print("class="); pw.println(info.className);
        }
        if (info.manageSpaceActivityName != null) {
            pw.print(prefix); pw.print("manageSpaceActivityName=");
            pw.println(info.manageSpaceActivityName);
        }

        pw.print(prefix); pw.print("dir="); pw.print(info.sourceDir);
                pw.print(" publicDir="); pw.print(info.publicSourceDir);
                pw.print(" data="); pw.println(info.dataDir);
        pw.print(prefix); pw.print("packageList={");
        for (int i=0; i<pkgList.size(); i++) {
            if (i > 0) pw.print(", ");
            pw.print(pkgList.keyAt(i));
        }
        pw.println("}");
        if (pkgDeps != null) {
            pw.print(prefix); pw.print("packageDependencies={");
            for (int i=0; i<pkgDeps.size(); i++) {
                if (i > 0) pw.print(", ");
                pw.print(pkgDeps.valueAt(i));
            }
            pw.println("}");
        }
        pw.print(prefix); pw.print("compat="); pw.println(compat);
        if (mInstr != null) {
            pw.print(prefix); pw.print("mInstr="); pw.println(mInstr);
        }
        pw.print(prefix); pw.print("thread="); pw.println(thread);
        pw.print(prefix); pw.print("pid="); pw.print(pid); pw.print(" starting=");
                pw.println(starting);
        pw.print(prefix); pw.print("lastActivityTime=");
                TimeUtils.formatDuration(lastActivityTime, nowUptime, pw);
                pw.print(" lastPssTime=");
                TimeUtils.formatDuration(lastPssTime, nowUptime, pw);
                pw.print(" pssStatType="); pw.print(pssStatType);
                pw.print(" nextPssTime=");
                TimeUtils.formatDuration(nextPssTime, nowUptime, pw);
                pw.println();
        pw.print(prefix); pw.print("adjSeq="); pw.print(adjSeq);
                pw.print(" lruSeq="); pw.print(lruSeq);
                pw.print(" lastPss="); DebugUtils.printSizeValue(pw, lastPss*1024);
                pw.print(" lastSwapPss="); DebugUtils.printSizeValue(pw, lastSwapPss*1024);
                pw.print(" lastCachedPss="); DebugUtils.printSizeValue(pw, lastCachedPss*1024);
                pw.print(" lastCachedSwapPss="); DebugUtils.printSizeValue(pw, lastCachedSwapPss*1024);
                pw.println();
        pw.print(prefix); pw.print("procStateMemTracker: ");
        procStateMemTracker.dumpLine(pw);
        pw.print(prefix); pw.print("cached="); pw.print(cached);
                pw.print(" empty="); pw.println(empty);
        if (serviceb) {
            pw.print(prefix); pw.print("serviceb="); pw.print(serviceb);
                    pw.print(" serviceHighRam="); pw.println(serviceHighRam);
        }
        if (notCachedSinceIdle) {
            pw.print(prefix); pw.print("notCachedSinceIdle="); pw.print(notCachedSinceIdle);
                    pw.print(" initialIdlePss="); pw.println(initialIdlePss);
        }
        pw.print(prefix); pw.print("oom: max="); pw.print(maxAdj);
                pw.print(" curRaw="); pw.print(mCurRawAdj);
                pw.print(" setRaw="); pw.print(setRawAdj);
                pw.print(" cur="); pw.print(curAdj);
                pw.print(" set="); pw.println(setAdj);
        pw.print(prefix); pw.print("mCurSchedGroup="); pw.print(mCurSchedGroup);
                pw.print(" setSchedGroup="); pw.print(setSchedGroup);
                pw.print(" systemNoUi="); pw.print(systemNoUi);
                pw.print(" trimMemoryLevel="); pw.println(trimMemoryLevel);
        pw.print(prefix); pw.print("curProcState="); pw.print(getCurProcState());
                pw.print(" mRepProcState="); pw.print(mRepProcState);
                pw.print(" pssProcState="); pw.print(pssProcState);
                pw.print(" setProcState="); pw.print(setProcState);
                pw.print(" lastStateTime=");
                TimeUtils.formatDuration(lastStateTime, nowUptime, pw);
                pw.println();
        if (hasShownUi || mPendingUiClean || hasAboveClient || treatLikeActivity) {
            pw.print(prefix); pw.print("hasShownUi="); pw.print(hasShownUi);
                    pw.print(" pendingUiClean="); pw.print(mPendingUiClean);
                    pw.print(" hasAboveClient="); pw.print(hasAboveClient);
                    pw.print(" treatLikeActivity="); pw.println(treatLikeActivity);
        }
        if (hasTopUi() || hasOverlayUi() || runningRemoteAnimation) {
            pw.print(prefix); pw.print("hasTopUi="); pw.print(hasTopUi());
                    pw.print(" hasOverlayUi="); pw.print(hasOverlayUi());
                    pw.print(" runningRemoteAnimation="); pw.println(runningRemoteAnimation);
        }
        if (mHasForegroundServices || forcingToImportant != null) {
            pw.print(prefix); pw.print("mHasForegroundServices="); pw.print(mHasForegroundServices);
                    pw.print(" forcingToImportant="); pw.println(forcingToImportant);
        }
        if (reportedInteraction || mFgInteractionTime != 0) {
            pw.print(prefix); pw.print("reportedInteraction=");
            pw.print(reportedInteraction);
            if (mInteractionEventTime != 0) {
                pw.print(" time=");
                TimeUtils.formatDuration(mInteractionEventTime, SystemClock.elapsedRealtime(), pw);
            }
            if (mFgInteractionTime != 0) {
                pw.print(" fgInteractionTime=");
                TimeUtils.formatDuration(mFgInteractionTime, SystemClock.elapsedRealtime(), pw);
            }
            pw.println();
        }
        if (mPersistent || removed) {
            pw.print(prefix); pw.print("persistent="); pw.print(mPersistent);
                    pw.print(" removed="); pw.println(removed);
        }
        if (mHasClientActivities || mHasForegroundActivities || repForegroundActivities) {
            pw.print(prefix); pw.print("hasClientActivities="); pw.print(mHasClientActivities);
                    pw.print(" foregroundActivities="); pw.print(mHasForegroundActivities);
                    pw.print(" (rep="); pw.print(repForegroundActivities); pw.println(")");
        }
        if (lastProviderTime > 0) {
            pw.print(prefix); pw.print("lastProviderTime=");
            TimeUtils.formatDuration(lastProviderTime, nowUptime, pw);
            pw.println();
        }
        if (lastTopTime > 0) {
            pw.print(prefix); pw.print("lastTopTime=");
            TimeUtils.formatDuration(lastTopTime, nowUptime, pw);
            pw.println();
        }
        if (hasStartedServices) {
            pw.print(prefix); pw.print("hasStartedServices="); pw.println(hasStartedServices);
        }
        if (pendingStart) {
            pw.print(prefix); pw.print("pendingStart="); pw.println(pendingStart);
        }
        pw.print(prefix); pw.print("startSeq="); pw.println(startSeq);
        pw.print(prefix); pw.print("mountMode="); pw.println(
                DebugUtils.valueToString(Zygote.class, "MOUNT_EXTERNAL_", mountMode));
        if (setProcState > ActivityManager.PROCESS_STATE_SERVICE) {
            pw.print(prefix); pw.print("lastCpuTime="); pw.print(lastCpuTime);
                    if (lastCpuTime > 0) {
                        pw.print(" timeUsed=");
                        TimeUtils.formatDuration(curCpuTime - lastCpuTime, pw);
                    }
                    pw.print(" whenUnimportant=");
                    TimeUtils.formatDuration(mWhenUnimportant - nowUptime, pw);
                    pw.println();
        }
        pw.print(prefix); pw.print("lastRequestedGc=");
                TimeUtils.formatDuration(lastRequestedGc, nowUptime, pw);
                pw.print(" lastLowMemory=");
                TimeUtils.formatDuration(lastLowMemory, nowUptime, pw);
                pw.print(" reportLowMemory="); pw.println(reportLowMemory);
        if (killed || killedByAm || waitingToKill != null) {
            pw.print(prefix); pw.print("killed="); pw.print(killed);
                    pw.print(" killedByAm="); pw.print(killedByAm);
                    pw.print(" waitingToKill="); pw.println(waitingToKill);
        }
        if (mDebugging || mCrashing || crashDialog != null || mNotResponding
                || anrDialog != null || bad) {
            pw.print(prefix); pw.print("mDebugging="); pw.print(mDebugging);
                    pw.print(" mCrashing="); pw.print(mCrashing);
                    pw.print(" "); pw.print(crashDialog);
                    pw.print(" mNotResponding="); pw.print(mNotResponding);
                    pw.print(" " ); pw.print(anrDialog);
                    pw.print(" bad="); pw.print(bad);

                    // mCrashing or mNotResponding is always set before errorReportReceiver
                    if (errorReportReceiver != null) {
                        pw.print(" errorReportReceiver=");
                        pw.print(errorReportReceiver.flattenToShortString());
                    }
                    pw.println();
        }
        if (whitelistManager) {
            pw.print(prefix); pw.print("whitelistManager="); pw.println(whitelistManager);
        }
        if (isolatedEntryPoint != null || isolatedEntryPointArgs != null) {
            pw.print(prefix); pw.print("isolatedEntryPoint="); pw.println(isolatedEntryPoint);
            pw.print(prefix); pw.print("isolatedEntryPointArgs=");
            pw.println(Arrays.toString(isolatedEntryPointArgs));
        }
        mWindowProcessController.dump(pw, prefix);
        if (services.size() > 0) {
            pw.print(prefix); pw.println("Services:");
            for (int i=0; i<services.size(); i++) {
                pw.print(prefix); pw.print("  - "); pw.println(services.valueAt(i));
            }
        }
        if (executingServices.size() > 0) {
            pw.print(prefix); pw.print("Executing Services (fg=");
            pw.print(execServicesFg); pw.println(")");
            for (int i=0; i<executingServices.size(); i++) {
                pw.print(prefix); pw.print("  - "); pw.println(executingServices.valueAt(i));
            }
        }
        if (connections.size() > 0) {
            pw.print(prefix); pw.println("Connections:");
            for (int i=0; i<connections.size(); i++) {
                pw.print(prefix); pw.print("  - "); pw.println(connections.valueAt(i));
            }
        }
        if (pubProviders.size() > 0) {
            pw.print(prefix); pw.println("Published Providers:");
            for (int i=0; i<pubProviders.size(); i++) {
                pw.print(prefix); pw.print("  - "); pw.println(pubProviders.keyAt(i));
                pw.print(prefix); pw.print("    -> "); pw.println(pubProviders.valueAt(i));
            }
        }
        if (conProviders.size() > 0) {
            pw.print(prefix); pw.println("Connected Providers:");
            for (int i=0; i<conProviders.size(); i++) {
                pw.print(prefix); pw.print("  - "); pw.println(conProviders.get(i).toShortString());
            }
        }
        if (!curReceivers.isEmpty()) {
            pw.print(prefix); pw.println("Current Receivers:");
            for (int i=0; i < curReceivers.size(); i++) {
                pw.print(prefix); pw.print("  - "); pw.println(curReceivers.valueAt(i));
            }
        }
        if (receivers.size() > 0) {
            pw.print(prefix); pw.println("Receivers:");
            for (int i=0; i<receivers.size(); i++) {
                pw.print(prefix); pw.print("  - "); pw.println(receivers.valueAt(i));
            }
        }
    }

    ProcessRecord(ActivityManagerService _service, ApplicationInfo _info, String _processName,
            int _uid) {
        mService = _service;
        info = _info;
        isolated = _info.uid != _uid;
        uid = _uid;
        userId = UserHandle.getUserId(_uid);
        processName = _processName;
        maxAdj = ProcessList.UNKNOWN_ADJ;
        mCurRawAdj = setRawAdj = ProcessList.INVALID_ADJ;
        curAdj = setAdj = verifiedAdj = ProcessList.INVALID_ADJ;
        mPersistent = false;
        removed = false;
        lastStateTime = lastPssTime = nextPssTime = SystemClock.uptimeMillis();
        mWindowProcessController = new WindowProcessController(
                mService.mActivityTaskManager, info, processName, uid, userId, this, this);
        pkgList.put(_info.packageName, new ProcessStats.ProcessStateHolder(_info.longVersionCode));
    }

    public void setPid(int _pid) {
        pid = _pid;
        mWindowProcessController.setPid(pid);
        procStatFile = null;
        shortStringName = null;
        stringName = null;
    }

    public void makeActive(IApplicationThread _thread, ProcessStatsService tracker) {
        if (thread == null) {
            final ProcessState origBase = baseProcessTracker;
            if (origBase != null) {
                origBase.setState(ProcessStats.STATE_NOTHING,
                        tracker.getMemFactorLocked(), SystemClock.uptimeMillis(), pkgList.mPkgList);
                for (int ipkg = pkgList.size() - 1; ipkg >= 0; ipkg--) {
                    StatsLog.write(StatsLog.PROCESS_STATE_CHANGED,
                            uid, processName, pkgList.keyAt(ipkg),
                            ActivityManager.processStateAmToProto(ProcessStats.STATE_NOTHING),
                            pkgList.valueAt(ipkg).appVersion);
                }
                origBase.makeInactive();
            }
            baseProcessTracker = tracker.getProcessStateLocked(info.packageName, uid,
                    info.longVersionCode, processName);
            baseProcessTracker.makeActive();
            for (int i=0; i<pkgList.size(); i++) {
                ProcessStats.ProcessStateHolder holder = pkgList.valueAt(i);
                if (holder.state != null && holder.state != origBase) {
                    holder.state.makeInactive();
                }
                tracker.updateProcessStateHolderLocked(holder, pkgList.keyAt(i), uid,
                        info.longVersionCode, processName);
                if (holder.state != baseProcessTracker) {
                    holder.state.makeActive();
                }
            }
        }
        thread = _thread;
        mWindowProcessController.setThread(thread);
    }

    public void makeInactive(ProcessStatsService tracker) {
        thread = null;
        mWindowProcessController.setThread(null);
        final ProcessState origBase = baseProcessTracker;
        if (origBase != null) {
            if (origBase != null) {
                origBase.setState(ProcessStats.STATE_NOTHING,
                        tracker.getMemFactorLocked(), SystemClock.uptimeMillis(), pkgList.mPkgList);
                for (int ipkg = pkgList.size() - 1; ipkg >= 0; ipkg--) {
                    StatsLog.write(StatsLog.PROCESS_STATE_CHANGED,
                            uid, processName, pkgList.keyAt(ipkg),
                            ActivityManager.processStateAmToProto(ProcessStats.STATE_NOTHING),
                            pkgList.valueAt(ipkg).appVersion);
                }
                origBase.makeInactive();
            }
            baseProcessTracker = null;
            for (int i=0; i<pkgList.size(); i++) {
                ProcessStats.ProcessStateHolder holder = pkgList.valueAt(i);
                if (holder.state != null && holder.state != origBase) {
                    holder.state.makeInactive();
                }
                holder.pkg = null;
                holder.state = null;
            }
        }
    }

    boolean hasActivities() {
        return mWindowProcessController.hasActivities();
    }

    void clearActivities() {
        mWindowProcessController.clearActivities();
    }

    boolean hasActivitiesOrRecentTasks() {
        return mWindowProcessController.hasActivitiesOrRecentTasks();
    }

    boolean hasRecentTasks() {
        return mWindowProcessController.hasRecentTasks();
    }

    void clearRecentTasks() {
        mWindowProcessController.clearRecentTasks();
    }

    /**
     * This method returns true if any of the activities within the process record are interesting
     * to the user. See HistoryRecord.isInterestingToUserLocked()
     */
    public boolean isInterestingToUserLocked() {
        if (mWindowProcessController.isInterestingToUser()) {
            return true;
        }

        final int servicesSize = services.size();
        for (int i = 0; i < servicesSize; i++) {
            ServiceRecord r = services.valueAt(i);
            if (r.isForeground) {
                return true;
            }
        }
        return false;
    }

    public void unlinkDeathRecipient() {
        if (deathRecipient != null && thread != null) {
            thread.asBinder().unlinkToDeath(deathRecipient, 0);
        }
        deathRecipient = null;
    }

    void updateHasAboveClientLocked() {
        hasAboveClient = false;
        for (int i=connections.size()-1; i>=0; i--) {
            ConnectionRecord cr = connections.valueAt(i);
            if ((cr.flags&Context.BIND_ABOVE_CLIENT) != 0) {
                hasAboveClient = true;
                break;
            }
        }
    }

    int modifyRawOomAdj(int adj) {
        if (hasAboveClient) {
            // If this process has bound to any services with BIND_ABOVE_CLIENT,
            // then we need to drop its adjustment to be lower than the service's
            // in order to honor the request.  We want to drop it by one adjustment
            // level...  but there is special meaning applied to various levels so
            // we will skip some of them.
            if (adj < ProcessList.FOREGROUND_APP_ADJ) {
                // System process will not get dropped, ever
            } else if (adj < ProcessList.VISIBLE_APP_ADJ) {
                adj = ProcessList.VISIBLE_APP_ADJ;
            } else if (adj < ProcessList.PERCEPTIBLE_APP_ADJ) {
                adj = ProcessList.PERCEPTIBLE_APP_ADJ;
            } else if (adj < ProcessList.CACHED_APP_MIN_ADJ) {
                adj = ProcessList.CACHED_APP_MIN_ADJ;
            } else if (adj < ProcessList.CACHED_APP_MAX_ADJ) {
                adj++;
            }
        }
        return adj;
    }

    void scheduleCrash(String message) {
        // Checking killedbyAm should keep it from showing the crash dialog if the process
        // was already dead for a good / normal reason.
        if (!killedByAm) {
            if (thread != null) {
                if (pid == Process.myPid()) {
                    Slog.w(TAG, "scheduleCrash: trying to crash system process!");
                    return;
                }
                long ident = Binder.clearCallingIdentity();
                try {
                    thread.scheduleCrash(message);
                } catch (RemoteException e) {
                    // If it's already dead our work is done. If it's wedged just kill it.
                    // We won't get the crash dialog or the error reporting.
                    kill("scheduleCrash for '" + message + "' failed", true);
                } finally {
                    Binder.restoreCallingIdentity(ident);
                }
            }
        }
    }

    void kill(String reason, boolean noisy) {
        if (!killedByAm) {
            Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "kill");
            if (mService != null && (noisy || info.uid == mService.mCurOomAdjUid)) {
                mService.reportUidInfoMessageLocked(TAG,
                        "Killing " + toShortString() + " (adj " + setAdj + "): " + reason,
                        info.uid);
            }
            if (pid > 0) {
                EventLog.writeEvent(EventLogTags.AM_KILL, userId, pid, processName, setAdj, reason);
                Process.killProcessQuiet(pid);
                ProcessList.killProcessGroup(uid, pid);
            } else {
                pendingStart = false;
            }
            if (!mPersistent) {
                killed = true;
                killedByAm = true;
            }
            Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);
        }
    }

    @Override
    public void writeToProto(ProtoOutputStream proto, long fieldId) {
        long token = proto.start(fieldId);
        proto.write(ProcessRecordProto.PID, pid);
        proto.write(ProcessRecordProto.PROCESS_NAME, processName);
        if (info.uid < Process.FIRST_APPLICATION_UID) {
            proto.write(ProcessRecordProto.UID, uid);
        } else {
            proto.write(ProcessRecordProto.USER_ID, userId);
            proto.write(ProcessRecordProto.APP_ID, UserHandle.getAppId(info.uid));
            if (uid != info.uid) {
                proto.write(ProcessRecordProto.ISOLATED_APP_ID, UserHandle.getAppId(uid));
            }
        }
        proto.write(ProcessRecordProto.PERSISTENT, mPersistent);
        proto.end(token);
    }

    public String toShortString() {
        if (shortStringName != null) {
            return shortStringName;
        }
        StringBuilder sb = new StringBuilder(128);
        toShortString(sb);
        return shortStringName = sb.toString();
    }

    void toShortString(StringBuilder sb) {
        sb.append(pid);
        sb.append(':');
        sb.append(processName);
        sb.append('/');
        if (info.uid < Process.FIRST_APPLICATION_UID) {
            sb.append(uid);
        } else {
            sb.append('u');
            sb.append(userId);
            int appId = UserHandle.getAppId(info.uid);
            if (appId >= Process.FIRST_APPLICATION_UID) {
                sb.append('a');
                sb.append(appId - Process.FIRST_APPLICATION_UID);
            } else {
                sb.append('s');
                sb.append(appId);
            }
            if (uid != info.uid) {
                sb.append('i');
                sb.append(UserHandle.getAppId(uid) - Process.FIRST_ISOLATED_UID);
            }
        }
    }

    public String toString() {
        if (stringName != null) {
            return stringName;
        }
        StringBuilder sb = new StringBuilder(128);
        sb.append("ProcessRecord{");
        sb.append(Integer.toHexString(System.identityHashCode(this)));
        sb.append(' ');
        toShortString(sb);
        sb.append('}');
        return stringName = sb.toString();
    }

    public String makeAdjReason() {
        if (adjSource != null || adjTarget != null) {
            StringBuilder sb = new StringBuilder(128);
            sb.append(' ');
            if (adjTarget instanceof ComponentName) {
                sb.append(((ComponentName)adjTarget).flattenToShortString());
            } else if (adjTarget != null) {
                sb.append(adjTarget.toString());
            } else {
                sb.append("{null}");
            }
            sb.append("<=");
            if (adjSource instanceof ProcessRecord) {
                sb.append("Proc{");
                sb.append(((ProcessRecord)adjSource).toShortString());
                sb.append("}");
            } else if (adjSource != null) {
                sb.append(adjSource.toString());
            } else {
                sb.append("{null}");
            }
            return sb.toString();
        }
        return null;
    }

    @Override
    public void addPackage(String pkg, long versionCode) {
        synchronized (mService) {
            addPackage(pkg, versionCode, mService.mProcessStats);
        }
    }

    /*
     *  Return true if package has been added false if not
     */
    public boolean addPackage(String pkg, long versionCode, ProcessStatsService tracker) {
        if (!pkgList.containsKey(pkg)) {
            ProcessStats.ProcessStateHolder holder = new ProcessStats.ProcessStateHolder(
                    versionCode);
            if (baseProcessTracker != null) {
                tracker.updateProcessStateHolderLocked(holder, pkg, uid, versionCode, processName);
                pkgList.put(pkg, holder);
                if (holder.state != baseProcessTracker) {
                    holder.state.makeActive();
                }
            } else {
                pkgList.put(pkg, holder);
            }
            return true;
        }
        return false;
    }

    public int getSetAdjWithServices() {
        if (setAdj >= ProcessList.CACHED_APP_MIN_ADJ) {
            if (hasStartedServices) {
                return ProcessList.SERVICE_B_ADJ;
            }
        }
        return setAdj;
    }

    public void forceProcessStateUpTo(int newState) {
        if (mRepProcState > newState) {
            mRepProcState = newState;
            setCurProcState(newState);
            for (int ipkg = pkgList.size() - 1; ipkg >= 0; ipkg--) {
                StatsLog.write(StatsLog.PROCESS_STATE_CHANGED,
                        uid, processName, pkgList.keyAt(ipkg),
                        ActivityManager.processStateAmToProto(mRepProcState),
                        pkgList.valueAt(ipkg).appVersion);
            }
        }
    }

    /*
     *  Delete all packages from list except the package indicated in info
     */
    public void resetPackageList(ProcessStatsService tracker) {
        final int N = pkgList.size();
        if (baseProcessTracker != null) {
            long now = SystemClock.uptimeMillis();
            baseProcessTracker.setState(ProcessStats.STATE_NOTHING,
                    tracker.getMemFactorLocked(), now, pkgList.mPkgList);
            for (int ipkg = pkgList.size() - 1; ipkg >= 0; ipkg--) {
                StatsLog.write(StatsLog.PROCESS_STATE_CHANGED,
                        uid, processName, pkgList.keyAt(ipkg),
                        ActivityManager.processStateAmToProto(ProcessStats.STATE_NOTHING),
                        pkgList.valueAt(ipkg).appVersion);
            }
            if (N != 1) {
                for (int i=0; i<N; i++) {
                    ProcessStats.ProcessStateHolder holder = pkgList.valueAt(i);
                    if (holder.state != null && holder.state != baseProcessTracker) {
                        holder.state.makeInactive();
                    }

                }
                pkgList.clear();
                ProcessStats.ProcessStateHolder holder = new ProcessStats.ProcessStateHolder(
                        info.longVersionCode);
                tracker.updateProcessStateHolderLocked(holder, info.packageName, uid,
                        info.longVersionCode, processName);
                pkgList.put(info.packageName, holder);
                if (holder.state != baseProcessTracker) {
                    holder.state.makeActive();
                }
            }
        } else if (N != 1) {
            pkgList.clear();
            pkgList.put(info.packageName, new ProcessStats.ProcessStateHolder(info.longVersionCode));
        }
    }

    public String[] getPackageList() {
        int size = pkgList.size();
        if (size == 0) {
            return null;
        }
        String list[] = new String[size];
        for (int i=0; i<pkgList.size(); i++) {
            list[i] = pkgList.keyAt(i);
        }
        return list;
    }

    WindowProcessController getWindowProcessController() {
        return mWindowProcessController;
    }

    void setCurrentSchedulingGroup(int curSchedGroup) {
        mCurSchedGroup = curSchedGroup;
        mWindowProcessController.setCurrentSchedulingGroup(curSchedGroup);
    }

    int getCurrentSchedulingGroup() {
        return mCurSchedGroup;
    }

    void setCurProcState(int curProcState) {
        mCurProcState = curProcState;
        mWindowProcessController.setCurrentProcState(mCurProcState);
    }

    int getCurProcState() {
        return mCurProcState;
    }

    void setReportedProcState(int repProcState) {
        mRepProcState = repProcState;
        for (int ipkg = pkgList.size() - 1; ipkg >= 0; ipkg--) {
            StatsLog.write(StatsLog.PROCESS_STATE_CHANGED,
                    uid, processName, pkgList.keyAt(ipkg),
                    ActivityManager.processStateAmToProto(mRepProcState),
                    pkgList.valueAt(ipkg).appVersion);
        }
        mWindowProcessController.setReportedProcState(repProcState);
    }

    int getReportedProcState() {
        return mRepProcState;
    }

    void setCrashing(boolean crashing) {
        mCrashing = crashing;
        mWindowProcessController.setCrashing(crashing);
    }

    boolean isCrashing() {
        return mCrashing;
    }

    void setNotResponding(boolean notResponding) {
        mNotResponding = notResponding;
        mWindowProcessController.setNotResponding(notResponding);
    }

    boolean isNotResponding() {
        return mNotResponding;
    }

    void setPersistent(boolean persistent) {
        mPersistent = persistent;
        mWindowProcessController.setPersistent(persistent);
    }

    boolean isPersistent() {
        return mPersistent;
    }

    public void setRequiredAbi(String requiredAbi) {
        mRequiredAbi = requiredAbi;
        mWindowProcessController.setRequiredAbi(requiredAbi);
    }

    String getRequiredAbi() {
        return mRequiredAbi;
    }

    void setHasForegroundServices(boolean hasForegroundServices) {
        mHasForegroundServices = hasForegroundServices;
        mWindowProcessController.setHasForegroundServices(hasForegroundServices);
    }

    boolean hasForegroundServices() {
        return mHasForegroundServices;
    }

    void setHasForegroundActivities(boolean hasForegroundActivities) {
        mHasForegroundActivities = hasForegroundActivities;
        mWindowProcessController.setHasForegroundActivities(hasForegroundActivities);
    }

    boolean hasForegroundActivities() {
        return mHasForegroundActivities;
    }

    void setHasClientActivities(boolean hasClientActivities) {
        mHasClientActivities = hasClientActivities;
        mWindowProcessController.setHasClientActivities(hasClientActivities);
    }

    boolean hasClientActivities() {
        return mHasClientActivities;
    }

    void setHasTopUi(boolean hasTopUi) {
        mHasTopUi = hasTopUi;
        mWindowProcessController.setHasTopUi(hasTopUi);
    }

    boolean hasTopUi() {
        return mHasTopUi;
    }

    void setHasOverlayUi(boolean hasOverlayUi) {
        mHasOverlayUi = hasOverlayUi;
        mWindowProcessController.setHasOverlayUi(hasOverlayUi);
    }

    boolean hasOverlayUi() {
        return mHasOverlayUi;
    }

    void setInteractionEventTime(long interactionEventTime) {
        mInteractionEventTime = interactionEventTime;
        mWindowProcessController.setInteractionEventTime(interactionEventTime);
    }

    long getInteractionEventTime() {
        return mInteractionEventTime;
    }

    void setFgInteractionTime(long fgInteractionTime) {
        mFgInteractionTime = fgInteractionTime;
        mWindowProcessController.setFgInteractionTime(fgInteractionTime);
    }

    long getFgInteractionTime() {
        return mFgInteractionTime;
    }

    void setWhenUnimportant(long whenUnimportant) {
        mWhenUnimportant = whenUnimportant;
        mWindowProcessController.setWhenUnimportant(whenUnimportant);
    }

    long getWhenUnimportant() {
        return mWhenUnimportant;
    }

    void setDebugging(boolean debugging) {
        mDebugging = debugging;
        mWindowProcessController.setDebugging(debugging);
    }

    boolean isDebugging() {
        return mDebugging;
    }

    void setUsingWrapper(boolean usingWrapper) {
        mUsingWrapper = usingWrapper;
        mWindowProcessController.setUsingWrapper(usingWrapper);
    }

    boolean isUsingWrapper() {
        return mUsingWrapper;
    }

    void setActiveInstrumentation(ActiveInstrumentation instr) {
        mInstr = instr;
        mWindowProcessController.setInstrumenting(instr != null);
    }

    ActiveInstrumentation getActiveInstrumentation() {
        return mInstr;
    }

    void setCurRawAdj(int curRawAdj) {
        mCurRawAdj = curRawAdj;
        mWindowProcessController.setPerceptible(curRawAdj <= ProcessList.PERCEPTIBLE_APP_ADJ);
    }

    int getCurRawAdj() {
        return mCurRawAdj;
    }

    @Override
    public void clearProfilerIfNeeded() {
        synchronized (mService) {
            if (mService.mProfileData.getProfileProc() == null
                    || mService.mProfileData.getProfilerInfo() == null
                    || mService.mProfileData.getProfileProc() != this) {
                return;
            }
            mService.clearProfilerLocked();
        }
    }

    @Override
    public void updateServiceConnectionActivities() {
        synchronized (mService) {
            mService.mServices.updateServiceConnectionActivitiesLocked(this);
        }
    }

    @Override
    public void setPendingUiClean(boolean pendingUiClean) {
        synchronized (mService) {
            mPendingUiClean = pendingUiClean;
            mWindowProcessController.setPendingUiClean(pendingUiClean);
        }
    }

    boolean hasPendingUiClean() {
        return mPendingUiClean;
    }

    @Override
    public void setPendingUiCleanAndForceProcessStateUpTo(int newState) {
        synchronized (mService) {
            setPendingUiClean(true);
            forceProcessStateUpTo(newState);
        }
    }

    @Override
    public void updateProcessInfo(boolean updateServiceConnectionActivities, boolean updateLru,
            boolean activityChange, boolean updateOomAdj) {
        synchronized (mService) {
            if (updateServiceConnectionActivities) {
                mService.mServices.updateServiceConnectionActivitiesLocked(this);
            }
            if (updateLru) {
                mService.mProcessList.updateLruProcessLocked(this, activityChange, null);
            }
            if (updateOomAdj) {
                mService.updateOomAdjLocked();
            }
        }
    }

    @Override
    public void setRemoved(boolean removed) {
        synchronized (mService) {
            this.removed = removed;
        }
    }

    /**
     * Returns the total time (in milliseconds) spent executing in both user and system code.
     * Safe to call without lock held.
     */
    @Override
    public long getCpuTime() {
        return mService.mProcessCpuTracker.getCpuTimeForPid(pid);
    }

    @Override
    public void clearWaitingToKill() {
        synchronized (mService) {
            waitingToKill = null;
        }
    }

    @Override
    public void onStartActivity(int topProcessState, boolean setProfileProc) {
        synchronized (mService) {
            if (setProfileProc) {
                mService.mProfileData.setProfileProc(this);
            }

            hasShownUi = true;
            setPendingUiClean(true);
            forceProcessStateUpTo(topProcessState);
        }
    }

    @Override
    public void appDied() {
        synchronized (mService) {
            mService.appDiedLocked(this);
        }
    }

    public long getInputDispatchingTimeout() {
        return mWindowProcessController.getInputDispatchingTimeout();
    }

    public int getProcessClassEnum() {
        if (pid == MY_PID) {
            return ServerProtoEnums.SYSTEM_SERVER;
        }
        if (info == null) {
            return ServerProtoEnums.ERROR_SOURCE_UNKNOWN;
        }
        return (info.flags & ApplicationInfo.FLAG_SYSTEM) != 0 ? ServerProtoEnums.SYSTEM_APP :
            ServerProtoEnums.DATA_APP;
    }

    void appNotResponding(String activityShortComponentName, ApplicationInfo aInfo,
            String parentShortComponentName, WindowProcessController parentProcess,
            boolean aboveSystem, String annotation) {
        ArrayList<Integer> firstPids = new ArrayList<>(5);
        SparseArray<Boolean> lastPids = new SparseArray<>(20);

        mWindowProcessController.appEarlyNotResponding(annotation, () -> kill("anr", true));

        long anrTime = SystemClock.uptimeMillis();
        if (ActivityManagerService.MONITOR_CPU_USAGE) {
            mService.updateCpuStatsNow();
        }

        // Unless configured otherwise, swallow ANRs in background processes & kill the process.
        boolean showBackground = Settings.Secure.getInt(mService.mContext.getContentResolver(),
                Settings.Secure.ANR_SHOW_BACKGROUND, 0) != 0;

        boolean isSilentANR;

        synchronized (mService) {
            // PowerManager.reboot() can block for a long time, so ignore ANRs while shutting down.
            if (mService.mAtmInternal.isShuttingDown()) {
                Slog.i(TAG, "During shutdown skipping ANR: " + this + " " + annotation);
                return;
            } else if (isNotResponding()) {
                Slog.i(TAG, "Skipping duplicate ANR: " + this + " " + annotation);
                return;
            } else if (isCrashing()) {
                Slog.i(TAG, "Crashing app skipping ANR: " + this + " " + annotation);
                return;
            } else if (killedByAm) {
                Slog.i(TAG, "App already killed by AM skipping ANR: " + this + " " + annotation);
                return;
            } else if (killed) {
                Slog.i(TAG, "Skipping died app ANR: " + this + " " + annotation);
                return;
            }

            // In case we come through here for the same app before completing
            // this one, mark as anring now so we will bail out.
            setNotResponding(true);

            // Log the ANR to the event log.
            EventLog.writeEvent(EventLogTags.AM_ANR, userId, pid, processName, info.flags,
                    annotation);

            // Dump thread traces as quickly as we can, starting with "interesting" processes.
            firstPids.add(pid);

            // Don't dump other PIDs if it's a background ANR
            isSilentANR = !showBackground && !isInterestingForBackgroundTraces();
            if (!isSilentANR) {
                int parentPid = pid;
                if (parentProcess != null && parentProcess.getPid() > 0) {
                    parentPid = parentProcess.getPid();
                }
                if (parentPid != pid) firstPids.add(parentPid);

                if (MY_PID != pid && MY_PID != parentPid) firstPids.add(MY_PID);

                for (int i = mService.mProcessList.mLruProcesses.size() - 1; i >= 0; i--) {
                    ProcessRecord r = mService.mProcessList.mLruProcesses.get(i);
                    if (r != null && r.thread != null) {
                        int myPid = r.pid;
                        if (myPid > 0 && myPid != pid && myPid != parentPid && myPid != MY_PID) {
                            if (r.isPersistent()) {
                                firstPids.add(myPid);
                                if (DEBUG_ANR) Slog.i(TAG, "Adding persistent proc: " + r);
                            } else if (r.treatLikeActivity) {
                                firstPids.add(myPid);
                                if (DEBUG_ANR) Slog.i(TAG, "Adding likely IME: " + r);
                            } else {
                                lastPids.put(myPid, Boolean.TRUE);
                                if (DEBUG_ANR) Slog.i(TAG, "Adding ANR proc: " + r);
                            }
                        }
                    }
                }
            }
        }

        // Log the ANR to the main log.
        StringBuilder info = new StringBuilder();
        info.setLength(0);
        info.append("ANR in ").append(processName);
        if (activityShortComponentName != null) {
            info.append(" (").append(activityShortComponentName).append(")");
        }
        info.append("\n");
        info.append("PID: ").append(pid).append("\n");
        if (annotation != null) {
            info.append("Reason: ").append(annotation).append("\n");
        }
        if (parentShortComponentName != null
                && parentShortComponentName.equals(activityShortComponentName)) {
            info.append("Parent: ").append(parentShortComponentName).append("\n");
        }

        ProcessCpuTracker processCpuTracker = new ProcessCpuTracker(true);

        // don't dump native PIDs for background ANRs unless it is the process of interest
        String[] nativeProcs = null;
        if (isSilentANR) {
            for (int i = 0; i < NATIVE_STACKS_OF_INTEREST.length; i++) {
                if (NATIVE_STACKS_OF_INTEREST[i].equals(processName)) {
                    nativeProcs = new String[] { processName };
                    break;
                }
            }
        } else {
            nativeProcs = NATIVE_STACKS_OF_INTEREST;
        }

        int[] pids = nativeProcs == null ? null : Process.getPidsForCommands(nativeProcs);
        ArrayList<Integer> nativePids = null;

        if (pids != null) {
            nativePids = new ArrayList<>(pids.length);
            for (int i : pids) {
                nativePids.add(i);
            }
        }

        // For background ANRs, don't pass the ProcessCpuTracker to
        // avoid spending 1/2 second collecting stats to rank lastPids.
        File tracesFile = ActivityManagerService.dumpStackTraces(firstPids,
                (isSilentANR) ? null : processCpuTracker, (isSilentANR) ? null : lastPids,
                nativePids);

        String cpuInfo = null;
        if (ActivityManagerService.MONITOR_CPU_USAGE) {
            mService.updateCpuStatsNow();
            synchronized (mService.mProcessCpuTracker) {
                cpuInfo = mService.mProcessCpuTracker.printCurrentState(anrTime);
            }
            info.append(processCpuTracker.printCurrentLoad());
            info.append(cpuInfo);
        }

        info.append(processCpuTracker.printCurrentState(anrTime));

        Slog.e(TAG, info.toString());
        if (tracesFile == null) {
            // There is no trace file, so dump (only) the alleged culprit's threads to the log
            Process.sendSignal(pid, Process.SIGNAL_QUIT);
        }

        StatsLog.write(StatsLog.ANR_OCCURRED, uid, processName,
                activityShortComponentName == null ? "unknown": activityShortComponentName,
                annotation,
                (this.info != null) ? (this.info.isInstantApp()
                        ? StatsLog.ANROCCURRED__IS_INSTANT_APP__TRUE
                        : StatsLog.ANROCCURRED__IS_INSTANT_APP__FALSE)
                        : StatsLog.ANROCCURRED__IS_INSTANT_APP__UNAVAILABLE,
                isInterestingToUserLocked()
                        ? StatsLog.ANROCCURRED__FOREGROUND_STATE__FOREGROUND
                        : StatsLog.ANROCCURRED__FOREGROUND_STATE__BACKGROUND,
                getProcessClassEnum(),
                (this.info != null) ? this.info.packageName : "");
        final ProcessRecord parentPr = parentProcess != null
                ? (ProcessRecord) parentProcess.mOwner : null;
        mService.addErrorToDropBox("anr", this, processName, activityShortComponentName,
                parentShortComponentName, parentPr, annotation, cpuInfo, tracesFile, null);

        if (mWindowProcessController.appNotResponding(info.toString(), () -> kill("anr", true),
                () -> {
                    synchronized (mService) {
                        mService.mServices.scheduleServiceTimeoutLocked(this);
                    }
                })) {
            return;
        }

        synchronized (mService) {
            mService.mBatteryStatsService.noteProcessAnr(processName, uid);

            if (isSilentANR) {
                kill("bg anr", true);
                return;
            }

            // Set the app's notResponding state, and look up the errorReportReceiver
            makeAppNotRespondingLocked(activityShortComponentName,
                    annotation != null ? "ANR " + annotation : "ANR", info.toString());

            // Bring up the infamous App Not Responding dialog
            Message msg = Message.obtain();
            msg.what = ActivityManagerService.SHOW_NOT_RESPONDING_UI_MSG;
            msg.obj = new AppNotRespondingDialog.Data(this, aInfo, aboveSystem);

            mService.mUiHandler.sendMessage(msg);
        }
    }

    private void makeAppNotRespondingLocked(String activity, String shortMsg, String longMsg) {
        setNotResponding(true);
        notRespondingReport = mService.mAppErrors.generateProcessError(this,
                ActivityManager.ProcessErrorStateInfo.NOT_RESPONDING,
                activity, shortMsg, longMsg, null);
        startAppProblemLocked();
        getWindowProcessController().stopFreezingActivities();
    }

    void startAppProblemLocked() {
        // If this app is not running under the current user, then we can't give it a report button
        // because that would require launching the report UI under a different user.
        errorReportReceiver = null;

        for (int userId : mService.mUserController.getCurrentProfileIds()) {
            if (this.userId == userId) {
                errorReportReceiver = ApplicationErrorReport.getErrorReportReceiver(
                        mService.mContext, info.packageName, info.flags);
            }
        }
        mService.skipCurrentReceiverLocked(this);
    }

    private boolean isInterestingForBackgroundTraces() {
        // The system_server is always considered interesting.
        if (pid == MY_PID) {
            return true;
        }

        // A package is considered interesting if any of the following is true :
        //
        // - It's displaying an activity.
        // - It's the SystemUI.
        // - It has an overlay or a top UI visible.
        //
        // NOTE: The check whether a given ProcessRecord belongs to the systemui
        // process is a bit of a kludge, but the same pattern seems repeated at
        // several places in the system server.
        return isInterestingToUserLocked() ||
                (info != null && "com.android.systemui".equals(info.packageName))
                || (hasTopUi() || hasOverlayUi());
    }
}