src/guardrail/StatsdStats.cpp

/*
 * Copyright 2017, 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.
 */
#define DEBUG false  // STOPSHIP if true
#include "Log.h"

#include "StatsdStats.h"

#include <android/util/ProtoOutputStream.h>
#include "../stats_log_util.h"
#include "statslog_statsd.h"
#include "storage/StorageManager.h"

namespace android {
namespace os {
namespace statsd {

using android::util::FIELD_COUNT_REPEATED;
using android::util::FIELD_TYPE_BOOL;
using android::util::FIELD_TYPE_FLOAT;
using android::util::FIELD_TYPE_INT32;
using android::util::FIELD_TYPE_INT64;
using android::util::FIELD_TYPE_MESSAGE;
using android::util::FIELD_TYPE_STRING;
using android::util::ProtoOutputStream;
using std::lock_guard;
using std::shared_ptr;
using std::string;
using std::to_string;
using std::vector;

const int FIELD_ID_BEGIN_TIME = 1;
const int FIELD_ID_END_TIME = 2;
const int FIELD_ID_CONFIG_STATS = 3;
const int FIELD_ID_ATOM_STATS = 7;
const int FIELD_ID_UIDMAP_STATS = 8;
const int FIELD_ID_ANOMALY_ALARM_STATS = 9;
const int FIELD_ID_PERIODIC_ALARM_STATS = 12;
const int FIELD_ID_SYSTEM_SERVER_RESTART = 15;
const int FIELD_ID_LOGGER_ERROR_STATS = 16;
const int FIELD_ID_OVERFLOW = 18;
const int FIELD_ID_ACTIVATION_BROADCAST_GUARDRAIL = 19;

const int FIELD_ID_ATOM_STATS_TAG = 1;
const int FIELD_ID_ATOM_STATS_COUNT = 2;
const int FIELD_ID_ATOM_STATS_ERROR_COUNT = 3;

const int FIELD_ID_ANOMALY_ALARMS_REGISTERED = 1;
const int FIELD_ID_PERIODIC_ALARMS_REGISTERED = 1;

const int FIELD_ID_LOG_LOSS_STATS_TIME = 1;
const int FIELD_ID_LOG_LOSS_STATS_COUNT = 2;
const int FIELD_ID_LOG_LOSS_STATS_ERROR = 3;
const int FIELD_ID_LOG_LOSS_STATS_TAG = 4;
const int FIELD_ID_LOG_LOSS_STATS_UID = 5;
const int FIELD_ID_LOG_LOSS_STATS_PID = 6;

const int FIELD_ID_OVERFLOW_COUNT = 1;
const int FIELD_ID_OVERFLOW_MAX_HISTORY = 2;
const int FIELD_ID_OVERFLOW_MIN_HISTORY = 3;

const int FIELD_ID_CONFIG_STATS_UID = 1;
const int FIELD_ID_CONFIG_STATS_ID = 2;
const int FIELD_ID_CONFIG_STATS_CREATION = 3;
const int FIELD_ID_CONFIG_STATS_RESET = 19;
const int FIELD_ID_CONFIG_STATS_DELETION = 4;
const int FIELD_ID_CONFIG_STATS_METRIC_COUNT = 5;
const int FIELD_ID_CONFIG_STATS_CONDITION_COUNT = 6;
const int FIELD_ID_CONFIG_STATS_MATCHER_COUNT = 7;
const int FIELD_ID_CONFIG_STATS_ALERT_COUNT = 8;
const int FIELD_ID_CONFIG_STATS_VALID = 9;
const int FIELD_ID_CONFIG_STATS_BROADCAST = 10;
const int FIELD_ID_CONFIG_STATS_DATA_DROP_TIME = 11;
const int FIELD_ID_CONFIG_STATS_DATA_DROP_BYTES = 21;
const int FIELD_ID_CONFIG_STATS_DUMP_REPORT_TIME = 12;
const int FIELD_ID_CONFIG_STATS_DUMP_REPORT_BYTES = 20;
const int FIELD_ID_CONFIG_STATS_MATCHER_STATS = 13;
const int FIELD_ID_CONFIG_STATS_CONDITION_STATS = 14;
const int FIELD_ID_CONFIG_STATS_METRIC_STATS = 15;
const int FIELD_ID_CONFIG_STATS_ALERT_STATS = 16;
const int FIELD_ID_CONFIG_STATS_METRIC_DIMENSION_IN_CONDITION_STATS = 17;
const int FIELD_ID_CONFIG_STATS_ANNOTATION = 18;
const int FIELD_ID_CONFIG_STATS_ACTIVATION = 22;
const int FIELD_ID_CONFIG_STATS_DEACTIVATION = 23;
const int FIELD_ID_CONFIG_STATS_ANNOTATION_INT64 = 1;
const int FIELD_ID_CONFIG_STATS_ANNOTATION_INT32 = 2;

const int FIELD_ID_MATCHER_STATS_ID = 1;
const int FIELD_ID_MATCHER_STATS_COUNT = 2;
const int FIELD_ID_CONDITION_STATS_ID = 1;
const int FIELD_ID_CONDITION_STATS_COUNT = 2;
const int FIELD_ID_METRIC_STATS_ID = 1;
const int FIELD_ID_METRIC_STATS_COUNT = 2;
const int FIELD_ID_ALERT_STATS_ID = 1;
const int FIELD_ID_ALERT_STATS_COUNT = 2;

const int FIELD_ID_UID_MAP_CHANGES = 1;
const int FIELD_ID_UID_MAP_BYTES_USED = 2;
const int FIELD_ID_UID_MAP_DROPPED_CHANGES = 3;
const int FIELD_ID_UID_MAP_DELETED_APPS = 4;

const int FIELD_ID_ACTIVATION_BROADCAST_GUARDRAIL_UID = 1;
const int FIELD_ID_ACTIVATION_BROADCAST_GUARDRAIL_TIME = 2;

const std::map<int, std::pair<size_t, size_t>> StatsdStats::kAtomDimensionKeySizeLimitMap = {
        {util::BINDER_CALLS, {6000, 10000}},
        {util::LOOPER_STATS, {1500, 2500}},
        {util::CPU_TIME_PER_UID_FREQ, {6000, 10000}},
};

StatsdStats::StatsdStats() {
    mPushedAtomStats.resize(kMaxPushedAtomId + 1);
    mStartTimeSec = getWallClockSec();
}

StatsdStats& StatsdStats::getInstance() {
    static StatsdStats statsInstance;
    return statsInstance;
}

void StatsdStats::addToIceBoxLocked(shared_ptr<ConfigStats>& stats) {
    // The size of mIceBox grows strictly by one at a time. It won't be > kMaxIceBoxSize.
    if (mIceBox.size() == kMaxIceBoxSize) {
        mIceBox.pop_front();
    }
    mIceBox.push_back(stats);
}

void StatsdStats::noteConfigReceived(
        const ConfigKey& key, int metricsCount, int conditionsCount, int matchersCount,
        int alertsCount, const std::list<std::pair<const int64_t, const int32_t>>& annotations,
        bool isValid) {
    lock_guard<std::mutex> lock(mLock);
    int32_t nowTimeSec = getWallClockSec();

    // If there is an existing config for the same key, icebox the old config.
    noteConfigRemovedInternalLocked(key);

    shared_ptr<ConfigStats> configStats = std::make_shared<ConfigStats>();
    configStats->uid = key.GetUid();
    configStats->id = key.GetId();
    configStats->creation_time_sec = nowTimeSec;
    configStats->metric_count = metricsCount;
    configStats->condition_count = conditionsCount;
    configStats->matcher_count = matchersCount;
    configStats->alert_count = alertsCount;
    configStats->is_valid = isValid;
    for (auto& v : annotations) {
        configStats->annotations.emplace_back(v);
    }

    if (isValid) {
        mConfigStats[key] = configStats;
    } else {
        configStats->deletion_time_sec = nowTimeSec;
        addToIceBoxLocked(configStats);
    }
}

void StatsdStats::noteConfigRemovedInternalLocked(const ConfigKey& key) {
    auto it = mConfigStats.find(key);
    if (it != mConfigStats.end()) {
        int32_t nowTimeSec = getWallClockSec();
        it->second->deletion_time_sec = nowTimeSec;
        addToIceBoxLocked(it->second);
        mConfigStats.erase(it);
    }
}

void StatsdStats::noteConfigRemoved(const ConfigKey& key) {
    lock_guard<std::mutex> lock(mLock);
    noteConfigRemovedInternalLocked(key);
}

void StatsdStats::noteConfigResetInternalLocked(const ConfigKey& key) {
    auto it = mConfigStats.find(key);
    if (it != mConfigStats.end()) {
        it->second->reset_time_sec = getWallClockSec();
    }
}

void StatsdStats::noteConfigReset(const ConfigKey& key) {
    lock_guard<std::mutex> lock(mLock);
    noteConfigResetInternalLocked(key);
}

void StatsdStats::noteLogLost(int32_t wallClockTimeSec, int32_t count, int32_t lastError,
                              int32_t lastTag, int32_t uid, int32_t pid) {
    lock_guard<std::mutex> lock(mLock);
    if (mLogLossStats.size() == kMaxLoggerErrors) {
        mLogLossStats.pop_front();
    }
    mLogLossStats.emplace_back(wallClockTimeSec, count, lastError, lastTag, uid, pid);
}

void StatsdStats::noteBroadcastSent(const ConfigKey& key) {
    noteBroadcastSent(key, getWallClockSec());
}

void StatsdStats::noteBroadcastSent(const ConfigKey& key, int32_t timeSec) {
    lock_guard<std::mutex> lock(mLock);
    auto it = mConfigStats.find(key);
    if (it == mConfigStats.end()) {
        ALOGE("Config key %s not found!", key.ToString().c_str());
        return;
    }
    if (it->second->broadcast_sent_time_sec.size() == kMaxTimestampCount) {
        it->second->broadcast_sent_time_sec.pop_front();
    }
    it->second->broadcast_sent_time_sec.push_back(timeSec);
}

void StatsdStats::noteActiveStatusChanged(const ConfigKey& key, bool activated) {
    noteActiveStatusChanged(key, activated, getWallClockSec());
}

void StatsdStats::noteActiveStatusChanged(const ConfigKey& key, bool activated, int32_t timeSec) {
    lock_guard<std::mutex> lock(mLock);
    auto it = mConfigStats.find(key);
    if (it == mConfigStats.end()) {
        ALOGE("Config key %s not found!", key.ToString().c_str());
        return;
    }
    auto& vec = activated ? it->second->activation_time_sec
                          : it->second->deactivation_time_sec;
    if (vec.size() == kMaxTimestampCount) {
        vec.pop_front();
    }
    vec.push_back(timeSec);
}

void StatsdStats::noteActivationBroadcastGuardrailHit(const int uid) {
    noteActivationBroadcastGuardrailHit(uid, getWallClockSec());
}

void StatsdStats::noteActivationBroadcastGuardrailHit(const int uid, const int32_t timeSec) {
    lock_guard<std::mutex> lock(mLock);
    auto& guardrailTimes = mActivationBroadcastGuardrailStats[uid];
    if (guardrailTimes.size() == kMaxTimestampCount) {
        guardrailTimes.pop_front();
    }
    guardrailTimes.push_back(timeSec);
}

void StatsdStats::noteDataDropped(const ConfigKey& key, const size_t totalBytes) {
    noteDataDropped(key, totalBytes, getWallClockSec());
}

void StatsdStats::noteEventQueueOverflow(int64_t oldestEventTimestampNs) {
    lock_guard<std::mutex> lock(mLock);

    mOverflowCount++;

    int64_t history = getElapsedRealtimeNs() - oldestEventTimestampNs;

    if (history > mMaxQueueHistoryNs) {
        mMaxQueueHistoryNs = history;
    }

    if (history < mMinQueueHistoryNs) {
        mMinQueueHistoryNs = history;
    }
}

void StatsdStats::noteDataDropped(const ConfigKey& key, const size_t totalBytes, int32_t timeSec) {
    lock_guard<std::mutex> lock(mLock);
    auto it = mConfigStats.find(key);
    if (it == mConfigStats.end()) {
        ALOGE("Config key %s not found!", key.ToString().c_str());
        return;
    }
    if (it->second->data_drop_time_sec.size() == kMaxTimestampCount) {
        it->second->data_drop_time_sec.pop_front();
        it->second->data_drop_bytes.pop_front();
    }
    it->second->data_drop_time_sec.push_back(timeSec);
    it->second->data_drop_bytes.push_back(totalBytes);
}

void StatsdStats::noteMetricsReportSent(const ConfigKey& key, const size_t num_bytes) {
    noteMetricsReportSent(key, num_bytes, getWallClockSec());
}

void StatsdStats::noteMetricsReportSent(const ConfigKey& key, const size_t num_bytes,
                                        int32_t timeSec) {
    lock_guard<std::mutex> lock(mLock);
    auto it = mConfigStats.find(key);
    if (it == mConfigStats.end()) {
        ALOGE("Config key %s not found!", key.ToString().c_str());
        return;
    }
    if (it->second->dump_report_stats.size() == kMaxTimestampCount) {
        it->second->dump_report_stats.pop_front();
    }
    it->second->dump_report_stats.push_back(std::make_pair(timeSec, num_bytes));
}

void StatsdStats::noteUidMapDropped(int deltas) {
    lock_guard<std::mutex> lock(mLock);
    mUidMapStats.dropped_changes += mUidMapStats.dropped_changes + deltas;
}

void StatsdStats::noteUidMapAppDeletionDropped() {
    lock_guard<std::mutex> lock(mLock);
    mUidMapStats.deleted_apps++;
}

void StatsdStats::setUidMapChanges(int changes) {
    lock_guard<std::mutex> lock(mLock);
    mUidMapStats.changes = changes;
}

void StatsdStats::setCurrentUidMapMemory(int bytes) {
    lock_guard<std::mutex> lock(mLock);
    mUidMapStats.bytes_used = bytes;
}

void StatsdStats::noteConditionDimensionSize(const ConfigKey& key, const int64_t& id, int size) {
    lock_guard<std::mutex> lock(mLock);
    // if name doesn't exist before, it will create the key with count 0.
    auto statsIt = mConfigStats.find(key);
    if (statsIt == mConfigStats.end()) {
        return;
    }

    auto& conditionSizeMap = statsIt->second->condition_stats;
    if (size > conditionSizeMap[id]) {
        conditionSizeMap[id] = size;
    }
}

void StatsdStats::noteMetricDimensionSize(const ConfigKey& key, const int64_t& id, int size) {
    lock_guard<std::mutex> lock(mLock);
    // if name doesn't exist before, it will create the key with count 0.
    auto statsIt = mConfigStats.find(key);
    if (statsIt == mConfigStats.end()) {
        return;
    }
    auto& metricsDimensionMap = statsIt->second->metric_stats;
    if (size > metricsDimensionMap[id]) {
        metricsDimensionMap[id] = size;
    }
}

void StatsdStats::noteMetricDimensionInConditionSize(
        const ConfigKey& key, const int64_t& id, int size) {
    lock_guard<std::mutex> lock(mLock);
    // if name doesn't exist before, it will create the key with count 0.
    auto statsIt = mConfigStats.find(key);
    if (statsIt == mConfigStats.end()) {
        return;
    }
    auto& metricsDimensionMap = statsIt->second->metric_dimension_in_condition_stats;
    if (size > metricsDimensionMap[id]) {
        metricsDimensionMap[id] = size;
    }
}

void StatsdStats::noteMatcherMatched(const ConfigKey& key, const int64_t& id) {
    lock_guard<std::mutex> lock(mLock);

    auto statsIt = mConfigStats.find(key);
    if (statsIt == mConfigStats.end()) {
        return;
    }
    statsIt->second->matcher_stats[id]++;
}

void StatsdStats::noteAnomalyDeclared(const ConfigKey& key, const int64_t& id) {
    lock_guard<std::mutex> lock(mLock);
    auto statsIt = mConfigStats.find(key);
    if (statsIt == mConfigStats.end()) {
        return;
    }
    statsIt->second->alert_stats[id]++;
}

void StatsdStats::noteRegisteredAnomalyAlarmChanged() {
    lock_guard<std::mutex> lock(mLock);
    mAnomalyAlarmRegisteredStats++;
}

void StatsdStats::noteRegisteredPeriodicAlarmChanged() {
    lock_guard<std::mutex> lock(mLock);
    mPeriodicAlarmRegisteredStats++;
}

void StatsdStats::updateMinPullIntervalSec(int pullAtomId, long intervalSec) {
    lock_guard<std::mutex> lock(mLock);
    mPulledAtomStats[pullAtomId].minPullIntervalSec =
            std::min(mPulledAtomStats[pullAtomId].minPullIntervalSec, intervalSec);
}

void StatsdStats::notePull(int pullAtomId) {
    lock_guard<std::mutex> lock(mLock);
    mPulledAtomStats[pullAtomId].totalPull++;
}

void StatsdStats::notePullFromCache(int pullAtomId) {
    lock_guard<std::mutex> lock(mLock);
    mPulledAtomStats[pullAtomId].totalPullFromCache++;
}

void StatsdStats::notePullTime(int pullAtomId, int64_t pullTimeNs) {
    lock_guard<std::mutex> lock(mLock);
    auto& pullStats = mPulledAtomStats[pullAtomId];
    pullStats.maxPullTimeNs = std::max(pullStats.maxPullTimeNs, pullTimeNs);
    pullStats.avgPullTimeNs = (pullStats.avgPullTimeNs * pullStats.numPullTime + pullTimeNs) /
                              (pullStats.numPullTime + 1);
    pullStats.numPullTime += 1;
}

void StatsdStats::notePullDelay(int pullAtomId, int64_t pullDelayNs) {
    lock_guard<std::mutex> lock(mLock);
    auto& pullStats = mPulledAtomStats[pullAtomId];
    pullStats.maxPullDelayNs = std::max(pullStats.maxPullDelayNs, pullDelayNs);
    pullStats.avgPullDelayNs =
        (pullStats.avgPullDelayNs * pullStats.numPullDelay + pullDelayNs) /
            (pullStats.numPullDelay + 1);
    pullStats.numPullDelay += 1;
}

void StatsdStats::notePullDataError(int pullAtomId) {
    lock_guard<std::mutex> lock(mLock);
    mPulledAtomStats[pullAtomId].dataError++;
}

void StatsdStats::notePullTimeout(int pullAtomId,
                                  int64_t pullUptimeMillis,
                                  int64_t pullElapsedMillis) {
    lock_guard<std::mutex> lock(mLock);
    PulledAtomStats& pulledAtomStats = mPulledAtomStats[pullAtomId];
    pulledAtomStats.pullTimeout++;

    if (pulledAtomStats.pullTimeoutMetadata.size() == kMaxTimestampCount) {
        pulledAtomStats.pullTimeoutMetadata.pop_front();
    }

    pulledAtomStats.pullTimeoutMetadata.emplace_back(pullUptimeMillis, pullElapsedMillis);
}

void StatsdStats::notePullExceedMaxDelay(int pullAtomId) {
    lock_guard<std::mutex> lock(mLock);
    mPulledAtomStats[pullAtomId].pullExceedMaxDelay++;
}

void StatsdStats::noteAtomLogged(int atomId, int32_t timeSec) {
    lock_guard<std::mutex> lock(mLock);

    if (atomId >= 0 && atomId <= kMaxPushedAtomId) {
        mPushedAtomStats[atomId]++;
    } else {
        if (atomId < 0) {
            android_errorWriteLog(0x534e4554, "187957589");
        }
        if (mNonPlatformPushedAtomStats.size() < kMaxNonPlatformPushedAtoms) {
            mNonPlatformPushedAtomStats[atomId]++;
        }
    }
}

void StatsdStats::noteSystemServerRestart(int32_t timeSec) {
    lock_guard<std::mutex> lock(mLock);

    if (mSystemServerRestartSec.size() == kMaxSystemServerRestarts) {
        mSystemServerRestartSec.pop_front();
    }
    mSystemServerRestartSec.push_back(timeSec);
}

void StatsdStats::notePullFailed(int atomId) {
    lock_guard<std::mutex> lock(mLock);
    mPulledAtomStats[atomId].pullFailed++;
}

void StatsdStats::notePullUidProviderNotFound(int atomId) {
    lock_guard<std::mutex> lock(mLock);
    mPulledAtomStats[atomId].pullUidProviderNotFound++;
}

void StatsdStats::notePullerNotFound(int atomId) {
    lock_guard<std::mutex> lock(mLock);
    mPulledAtomStats[atomId].pullerNotFound++;
}

void StatsdStats::notePullBinderCallFailed(int atomId) {
    lock_guard<std::mutex> lock(mLock);
    mPulledAtomStats[atomId].binderCallFailCount++;
}

void StatsdStats::noteEmptyData(int atomId) {
    lock_guard<std::mutex> lock(mLock);
    mPulledAtomStats[atomId].emptyData++;
}

void StatsdStats::notePullerCallbackRegistrationChanged(int atomId, bool registered) {
    lock_guard<std::mutex> lock(mLock);
    if (registered) {
        mPulledAtomStats[atomId].registeredCount++;
    } else {
        mPulledAtomStats[atomId].unregisteredCount++;
    }
}

void StatsdStats::noteHardDimensionLimitReached(int64_t metricId) {
    lock_guard<std::mutex> lock(mLock);
    getAtomMetricStats(metricId).hardDimensionLimitReached++;
}

void StatsdStats::noteLateLogEventSkipped(int64_t metricId) {
    lock_guard<std::mutex> lock(mLock);
    getAtomMetricStats(metricId).lateLogEventSkipped++;
}

void StatsdStats::noteSkippedForwardBuckets(int64_t metricId) {
    lock_guard<std::mutex> lock(mLock);
    getAtomMetricStats(metricId).skippedForwardBuckets++;
}

void StatsdStats::noteBadValueType(int64_t metricId) {
    lock_guard<std::mutex> lock(mLock);
    getAtomMetricStats(metricId).badValueType++;
}

void StatsdStats::noteBucketDropped(int64_t metricId) {
    lock_guard<std::mutex> lock(mLock);
    getAtomMetricStats(metricId).bucketDropped++;
}

void StatsdStats::noteBucketUnknownCondition(int64_t metricId) {
    lock_guard<std::mutex> lock(mLock);
    getAtomMetricStats(metricId).bucketUnknownCondition++;
}

void StatsdStats::noteConditionChangeInNextBucket(int64_t metricId) {
    lock_guard<std::mutex> lock(mLock);
    getAtomMetricStats(metricId).conditionChangeInNextBucket++;
}

void StatsdStats::noteInvalidatedBucket(int64_t metricId) {
    lock_guard<std::mutex> lock(mLock);
    getAtomMetricStats(metricId).invalidatedBucket++;
}

void StatsdStats::noteBucketCount(int64_t metricId) {
    lock_guard<std::mutex> lock(mLock);
    getAtomMetricStats(metricId).bucketCount++;
}

void StatsdStats::noteBucketBoundaryDelayNs(int64_t metricId, int64_t timeDelayNs) {
    lock_guard<std::mutex> lock(mLock);
    AtomMetricStats& metricStats = getAtomMetricStats(metricId);
    metricStats.maxBucketBoundaryDelayNs =
            std::max(metricStats.maxBucketBoundaryDelayNs, timeDelayNs);
    metricStats.minBucketBoundaryDelayNs =
            std::min(metricStats.minBucketBoundaryDelayNs, timeDelayNs);
}

void StatsdStats::noteAtomError(int atomTag, bool pull) {
    lock_guard<std::mutex> lock(mLock);
    if (pull) {
        mPulledAtomStats[atomTag].atomErrorCount++;
        return;
    }

    bool present = (mPushedAtomErrorStats.find(atomTag) != mPushedAtomErrorStats.end());
    bool full = (mPushedAtomErrorStats.size() >= (size_t)kMaxPushedAtomErrorStatsSize);
    if (!full || present) {
        mPushedAtomErrorStats[atomTag]++;
    }
}

StatsdStats::AtomMetricStats& StatsdStats::getAtomMetricStats(int64_t metricId) {
    auto atomMetricStatsIter = mAtomMetricStats.find(metricId);
    if (atomMetricStatsIter != mAtomMetricStats.end()) {
        return atomMetricStatsIter->second;
    }
    auto emplaceResult = mAtomMetricStats.emplace(metricId, AtomMetricStats());
    return emplaceResult.first->second;
}

void StatsdStats::reset() {
    lock_guard<std::mutex> lock(mLock);
    resetInternalLocked();
}

void StatsdStats::resetInternalLocked() {
    // Reset the historical data, but keep the active ConfigStats
    mStartTimeSec = getWallClockSec();
    mIceBox.clear();
    std::fill(mPushedAtomStats.begin(), mPushedAtomStats.end(), 0);
    mNonPlatformPushedAtomStats.clear();
    mAnomalyAlarmRegisteredStats = 0;
    mPeriodicAlarmRegisteredStats = 0;
    mSystemServerRestartSec.clear();
    mLogLossStats.clear();
    mOverflowCount = 0;
    mMinQueueHistoryNs = kInt64Max;
    mMaxQueueHistoryNs = 0;
    for (auto& config : mConfigStats) {
        config.second->broadcast_sent_time_sec.clear();
        config.second->activation_time_sec.clear();
        config.second->deactivation_time_sec.clear();
        config.second->data_drop_time_sec.clear();
        config.second->data_drop_bytes.clear();
        config.second->dump_report_stats.clear();
        config.second->annotations.clear();
        config.second->matcher_stats.clear();
        config.second->condition_stats.clear();
        config.second->metric_stats.clear();
        config.second->metric_dimension_in_condition_stats.clear();
        config.second->alert_stats.clear();
    }
    for (auto& pullStats : mPulledAtomStats) {
        pullStats.second.totalPull = 0;
        pullStats.second.totalPullFromCache = 0;
        pullStats.second.minPullIntervalSec = LONG_MAX;
        pullStats.second.avgPullTimeNs = 0;
        pullStats.second.maxPullTimeNs = 0;
        pullStats.second.numPullTime = 0;
        pullStats.second.avgPullDelayNs = 0;
        pullStats.second.maxPullDelayNs = 0;
        pullStats.second.numPullDelay = 0;
        pullStats.second.dataError = 0;
        pullStats.second.pullTimeout = 0;
        pullStats.second.pullExceedMaxDelay = 0;
        pullStats.second.pullFailed = 0;
        pullStats.second.pullUidProviderNotFound = 0;
        pullStats.second.pullerNotFound = 0;
        pullStats.second.registeredCount = 0;
        pullStats.second.unregisteredCount = 0;
        pullStats.second.atomErrorCount = 0;
        pullStats.second.binderCallFailCount = 0;
        pullStats.second.pullTimeoutMetadata.clear();
    }
    mAtomMetricStats.clear();
    mActivationBroadcastGuardrailStats.clear();
    mPushedAtomErrorStats.clear();
}

string buildTimeString(int64_t timeSec) {
    time_t t = timeSec;
    struct tm* tm = localtime(&t);
    char timeBuffer[80];
    strftime(timeBuffer, sizeof(timeBuffer), "%Y-%m-%d %I:%M%p", tm);
    return string(timeBuffer);
}

int StatsdStats::getPushedAtomErrors(int atomId) const {
    const auto& it = mPushedAtomErrorStats.find(atomId);
    if (it != mPushedAtomErrorStats.end()) {
        return it->second;
    } else {
        return 0;
    }
}

void StatsdStats::dumpStats(int out) const {
    lock_guard<std::mutex> lock(mLock);
    time_t t = mStartTimeSec;
    struct tm* tm = localtime(&t);
    char timeBuffer[80];
    strftime(timeBuffer, sizeof(timeBuffer), "%Y-%m-%d %I:%M%p\n", tm);
    dprintf(out, "Stats collection start second: %s\n", timeBuffer);
    dprintf(out, "%lu Config in icebox: \n", (unsigned long)mIceBox.size());
    for (const auto& configStats : mIceBox) {
        dprintf(out,
                "Config {%d_%lld}: creation=%d, deletion=%d, reset=%d, #metric=%d, #condition=%d, "
                "#matcher=%d, #alert=%d,  valid=%d\n",
                configStats->uid, (long long)configStats->id, configStats->creation_time_sec,
                configStats->deletion_time_sec, configStats->reset_time_sec,
                configStats->metric_count, configStats->condition_count, configStats->matcher_count,
                configStats->alert_count, configStats->is_valid);

        for (const auto& broadcastTime : configStats->broadcast_sent_time_sec) {
            dprintf(out, "\tbroadcast time: %d\n", broadcastTime);
        }

        for (const int& activationTime : configStats->activation_time_sec) {
            dprintf(out, "\tactivation time: %d\n", activationTime);
        }

        for (const int& deactivationTime : configStats->deactivation_time_sec) {
            dprintf(out, "\tdeactivation time: %d\n", deactivationTime);
        }

        auto dropTimePtr = configStats->data_drop_time_sec.begin();
        auto dropBytesPtr = configStats->data_drop_bytes.begin();
        for (int i = 0; i < (int)configStats->data_drop_time_sec.size();
             i++, dropTimePtr++, dropBytesPtr++) {
            dprintf(out, "\tdata drop time: %d with size %lld", *dropTimePtr,
                    (long long)*dropBytesPtr);
        }
    }
    dprintf(out, "%lu Active Configs\n", (unsigned long)mConfigStats.size());
    for (auto& pair : mConfigStats) {
        auto& configStats = pair.second;
        dprintf(out,
                "Config {%d-%lld}: creation=%d, deletion=%d, #metric=%d, #condition=%d, "
                "#matcher=%d, #alert=%d,  valid=%d\n",
                configStats->uid, (long long)configStats->id, configStats->creation_time_sec,
                configStats->deletion_time_sec, configStats->metric_count,
                configStats->condition_count, configStats->matcher_count, configStats->alert_count,
                configStats->is_valid);
        for (const auto& annotation : configStats->annotations) {
            dprintf(out, "\tannotation: %lld, %d\n", (long long)annotation.first,
                    annotation.second);
        }

        for (const auto& broadcastTime : configStats->broadcast_sent_time_sec) {
            dprintf(out, "\tbroadcast time: %s(%lld)\n", buildTimeString(broadcastTime).c_str(),
                    (long long)broadcastTime);
        }

        for (const int& activationTime : configStats->activation_time_sec) {
            dprintf(out, "\tactivation time: %d\n", activationTime);
        }

        for (const int& deactivationTime : configStats->deactivation_time_sec) {
            dprintf(out, "\tdeactivation time: %d\n", deactivationTime);
        }

        auto dropTimePtr = configStats->data_drop_time_sec.begin();
        auto dropBytesPtr = configStats->data_drop_bytes.begin();
        for (int i = 0; i < (int)configStats->data_drop_time_sec.size();
             i++, dropTimePtr++, dropBytesPtr++) {
            dprintf(out, "\tdata drop time: %s(%lld) with %lld bytes\n",
                    buildTimeString(*dropTimePtr).c_str(), (long long)*dropTimePtr,
                    (long long)*dropBytesPtr);
        }

        for (const auto& dump : configStats->dump_report_stats) {
            dprintf(out, "\tdump report time: %s(%lld) bytes: %lld\n",
                    buildTimeString(dump.first).c_str(), (long long)dump.first,
                    (long long)dump.second);
        }

        for (const auto& stats : pair.second->matcher_stats) {
            dprintf(out, "matcher %lld matched %d times\n", (long long)stats.first, stats.second);
        }

        for (const auto& stats : pair.second->condition_stats) {
            dprintf(out, "condition %lld max output tuple size %d\n", (long long)stats.first,
                    stats.second);
        }

        for (const auto& stats : pair.second->condition_stats) {
            dprintf(out, "metrics %lld max output tuple size %d\n", (long long)stats.first,
                    stats.second);
        }

        for (const auto& stats : pair.second->alert_stats) {
            dprintf(out, "alert %lld declared %d times\n", (long long)stats.first, stats.second);
        }
    }
    dprintf(out, "********Disk Usage stats***********\n");
    StorageManager::printStats(out);
    dprintf(out, "********Pushed Atom stats***********\n");
    const size_t atomCounts = mPushedAtomStats.size();
    for (size_t i = 2; i < atomCounts; i++) {
        if (mPushedAtomStats[i] > 0) {
            dprintf(out, "Atom %zu->(total count)%d, (error count)%d\n", i, mPushedAtomStats[i],
                    getPushedAtomErrors((int)i));
        }
    }
    for (const auto& pair : mNonPlatformPushedAtomStats) {
        dprintf(out, "Atom %d->(total count)%d, (error count)%d\n", pair.first, pair.second,
                getPushedAtomErrors(pair.first));
    }

    dprintf(out, "********Pulled Atom stats***********\n");
    for (const auto& pair : mPulledAtomStats) {
        dprintf(out,
                "Atom %d->(total pull)%ld, (pull from cache)%ld, "
                "(pull failed)%ld, (min pull interval)%ld \n"
                "  (average pull time nanos)%lld, (max pull time nanos)%lld, (average pull delay "
                "nanos)%lld, "
                "  (max pull delay nanos)%lld, (data error)%ld\n"
                "  (pull timeout)%ld, (pull exceed max delay)%ld"
                "  (no uid provider count)%ld, (no puller found count)%ld\n"
                "  (registered count) %ld, (unregistered count) %ld"
                "  (atom error count) %d\n",
                (int)pair.first, (long)pair.second.totalPull, (long)pair.second.totalPullFromCache,
                (long)pair.second.pullFailed, (long)pair.second.minPullIntervalSec,
                (long long)pair.second.avgPullTimeNs, (long long)pair.second.maxPullTimeNs,
                (long long)pair.second.avgPullDelayNs, (long long)pair.second.maxPullDelayNs,
                pair.second.dataError, pair.second.pullTimeout, pair.second.pullExceedMaxDelay,
                pair.second.pullUidProviderNotFound, pair.second.pullerNotFound,
                pair.second.registeredCount, pair.second.unregisteredCount,
                pair.second.atomErrorCount);
        if (pair.second.pullTimeoutMetadata.size() > 0) {
            string uptimeMillis = "(pull timeout system uptime millis) ";
            string pullTimeoutMillis = "(pull timeout elapsed time millis) ";
            for (const auto& stats : pair.second.pullTimeoutMetadata) {
                uptimeMillis.append(to_string(stats.pullTimeoutUptimeMillis)).append(",");;
                pullTimeoutMillis.append(to_string(stats.pullTimeoutElapsedMillis)).append(",");
            }
            uptimeMillis.pop_back();
            uptimeMillis.push_back('\n');
            pullTimeoutMillis.pop_back();
            pullTimeoutMillis.push_back('\n');
            dprintf(out, "%s", uptimeMillis.c_str());
            dprintf(out, "%s", pullTimeoutMillis.c_str());
        }
    }

    if (mAnomalyAlarmRegisteredStats > 0) {
        dprintf(out, "********AnomalyAlarmStats stats***********\n");
        dprintf(out, "Anomaly alarm registrations: %d\n", mAnomalyAlarmRegisteredStats);
    }

    if (mPeriodicAlarmRegisteredStats > 0) {
        dprintf(out, "********SubscriberAlarmStats stats***********\n");
        dprintf(out, "Subscriber alarm registrations: %d\n", mPeriodicAlarmRegisteredStats);
    }

    dprintf(out, "UID map stats: bytes=%d, changes=%d, deleted=%d, changes lost=%d\n",
            mUidMapStats.bytes_used, mUidMapStats.changes, mUidMapStats.deleted_apps,
            mUidMapStats.dropped_changes);

    for (const auto& restart : mSystemServerRestartSec) {
        dprintf(out, "System server restarts at %s(%lld)\n", buildTimeString(restart).c_str(),
                (long long)restart);
    }

    for (const auto& loss : mLogLossStats) {
        dprintf(out,
                "Log loss: %lld (wall clock sec) - %d (count), %d (last error), %d (last tag), %d "
                "(uid), %d (pid)\n",
                (long long)loss.mWallClockSec, loss.mCount, loss.mLastError, loss.mLastTag,
                loss.mUid, loss.mPid);
    }

    dprintf(out, "Event queue overflow: %d; MaxHistoryNs: %lld; MinHistoryNs: %lld\n",
            mOverflowCount, (long long)mMaxQueueHistoryNs, (long long)mMinQueueHistoryNs);

    if (mActivationBroadcastGuardrailStats.size() > 0) {
        dprintf(out, "********mActivationBroadcastGuardrail stats***********\n");
        for (const auto& pair: mActivationBroadcastGuardrailStats) {
            dprintf(out, "Uid %d: Times: ", pair.first);
            for (const auto& guardrailHitTime : pair.second) {
                dprintf(out, "%d ", guardrailHitTime);
            }
        }
        dprintf(out, "\n");
    }
}

void addConfigStatsToProto(const ConfigStats& configStats, ProtoOutputStream* proto) {
    uint64_t token =
            proto->start(FIELD_TYPE_MESSAGE | FIELD_COUNT_REPEATED | FIELD_ID_CONFIG_STATS);
    proto->write(FIELD_TYPE_INT32 | FIELD_ID_CONFIG_STATS_UID, configStats.uid);
    proto->write(FIELD_TYPE_INT64 | FIELD_ID_CONFIG_STATS_ID, (long long)configStats.id);
    proto->write(FIELD_TYPE_INT32 | FIELD_ID_CONFIG_STATS_CREATION, configStats.creation_time_sec);
    if (configStats.reset_time_sec != 0) {
        proto->write(FIELD_TYPE_INT32 | FIELD_ID_CONFIG_STATS_RESET, configStats.reset_time_sec);
    }
    if (configStats.deletion_time_sec != 0) {
        proto->write(FIELD_TYPE_INT32 | FIELD_ID_CONFIG_STATS_DELETION,
                     configStats.deletion_time_sec);
    }
    proto->write(FIELD_TYPE_INT32 | FIELD_ID_CONFIG_STATS_METRIC_COUNT, configStats.metric_count);
    proto->write(FIELD_TYPE_INT32 | FIELD_ID_CONFIG_STATS_CONDITION_COUNT,
                 configStats.condition_count);
    proto->write(FIELD_TYPE_INT32 | FIELD_ID_CONFIG_STATS_MATCHER_COUNT, configStats.matcher_count);
    proto->write(FIELD_TYPE_INT32 | FIELD_ID_CONFIG_STATS_ALERT_COUNT, configStats.alert_count);
    proto->write(FIELD_TYPE_BOOL | FIELD_ID_CONFIG_STATS_VALID, configStats.is_valid);

    for (const auto& broadcast : configStats.broadcast_sent_time_sec) {
        proto->write(FIELD_TYPE_INT32 | FIELD_ID_CONFIG_STATS_BROADCAST | FIELD_COUNT_REPEATED,
                     broadcast);
    }

    for (const auto& activation : configStats.activation_time_sec) {
        proto->write(FIELD_TYPE_INT32 | FIELD_ID_CONFIG_STATS_ACTIVATION | FIELD_COUNT_REPEATED,
                     activation);
    }

    for (const auto& deactivation : configStats.deactivation_time_sec) {
        proto->write(FIELD_TYPE_INT32 | FIELD_ID_CONFIG_STATS_DEACTIVATION | FIELD_COUNT_REPEATED,
                     deactivation);
    }

    for (const auto& drop_time : configStats.data_drop_time_sec) {
        proto->write(FIELD_TYPE_INT32 | FIELD_ID_CONFIG_STATS_DATA_DROP_TIME | FIELD_COUNT_REPEATED,
                     drop_time);
    }

    for (const auto& drop_bytes : configStats.data_drop_bytes) {
        proto->write(
                FIELD_TYPE_INT64 | FIELD_ID_CONFIG_STATS_DATA_DROP_BYTES | FIELD_COUNT_REPEATED,
                (long long)drop_bytes);
    }

    for (const auto& dump : configStats.dump_report_stats) {
        proto->write(FIELD_TYPE_INT32 | FIELD_ID_CONFIG_STATS_DUMP_REPORT_TIME |
                     FIELD_COUNT_REPEATED,
                     dump.first);
    }

    for (const auto& dump : configStats.dump_report_stats) {
        proto->write(FIELD_TYPE_INT64 | FIELD_ID_CONFIG_STATS_DUMP_REPORT_BYTES |
                     FIELD_COUNT_REPEATED,
                     (long long)dump.second);
    }

    for (const auto& annotation : configStats.annotations) {
        uint64_t token = proto->start(FIELD_TYPE_MESSAGE | FIELD_COUNT_REPEATED |
                                      FIELD_ID_CONFIG_STATS_ANNOTATION);
        proto->write(FIELD_TYPE_INT64 | FIELD_ID_CONFIG_STATS_ANNOTATION_INT64,
                     (long long)annotation.first);
        proto->write(FIELD_TYPE_INT32 | FIELD_ID_CONFIG_STATS_ANNOTATION_INT32, annotation.second);
        proto->end(token);
    }

    for (const auto& pair : configStats.matcher_stats) {
        uint64_t tmpToken = proto->start(FIELD_TYPE_MESSAGE | FIELD_COUNT_REPEATED |
                                          FIELD_ID_CONFIG_STATS_MATCHER_STATS);
        proto->write(FIELD_TYPE_INT64 | FIELD_ID_MATCHER_STATS_ID, (long long)pair.first);
        proto->write(FIELD_TYPE_INT32 | FIELD_ID_MATCHER_STATS_COUNT, pair.second);
        proto->end(tmpToken);
    }

    for (const auto& pair : configStats.condition_stats) {
        uint64_t tmpToken = proto->start(FIELD_TYPE_MESSAGE | FIELD_COUNT_REPEATED |
                                          FIELD_ID_CONFIG_STATS_CONDITION_STATS);
        proto->write(FIELD_TYPE_INT64 | FIELD_ID_CONDITION_STATS_ID, (long long)pair.first);
        proto->write(FIELD_TYPE_INT32 | FIELD_ID_CONDITION_STATS_COUNT, pair.second);
        proto->end(tmpToken);
    }

    for (const auto& pair : configStats.metric_stats) {
        uint64_t tmpToken = proto->start(FIELD_TYPE_MESSAGE | FIELD_COUNT_REPEATED |
                                          FIELD_ID_CONFIG_STATS_METRIC_STATS);
        proto->write(FIELD_TYPE_INT64 | FIELD_ID_METRIC_STATS_ID, (long long)pair.first);
        proto->write(FIELD_TYPE_INT32 | FIELD_ID_METRIC_STATS_COUNT, pair.second);
        proto->end(tmpToken);
    }
    for (const auto& pair : configStats.metric_dimension_in_condition_stats) {
        uint64_t tmpToken = proto->start(FIELD_TYPE_MESSAGE | FIELD_COUNT_REPEATED |
                                         FIELD_ID_CONFIG_STATS_METRIC_DIMENSION_IN_CONDITION_STATS);
        proto->write(FIELD_TYPE_INT64 | FIELD_ID_METRIC_STATS_ID, (long long)pair.first);
        proto->write(FIELD_TYPE_INT32 | FIELD_ID_METRIC_STATS_COUNT, pair.second);
        proto->end(tmpToken);
    }

    for (const auto& pair : configStats.alert_stats) {
        uint64_t tmpToken = proto->start(FIELD_TYPE_MESSAGE | FIELD_COUNT_REPEATED |
                                          FIELD_ID_CONFIG_STATS_ALERT_STATS);
        proto->write(FIELD_TYPE_INT64 | FIELD_ID_ALERT_STATS_ID, (long long)pair.first);
        proto->write(FIELD_TYPE_INT32 | FIELD_ID_ALERT_STATS_COUNT, pair.second);
        proto->end(tmpToken);
    }

    proto->end(token);
}

void StatsdStats::dumpStats(std::vector<uint8_t>* output, bool reset) {
    lock_guard<std::mutex> lock(mLock);

    ProtoOutputStream proto;
    proto.write(FIELD_TYPE_INT32 | FIELD_ID_BEGIN_TIME, mStartTimeSec);
    proto.write(FIELD_TYPE_INT32 | FIELD_ID_END_TIME, (int32_t)getWallClockSec());

    for (const auto& configStats : mIceBox) {
        addConfigStatsToProto(*configStats, &proto);
    }

    for (auto& pair : mConfigStats) {
        addConfigStatsToProto(*(pair.second), &proto);
    }

    const size_t atomCounts = mPushedAtomStats.size();
    for (size_t i = 2; i < atomCounts; i++) {
        if (mPushedAtomStats[i] > 0) {
            uint64_t token =
                    proto.start(FIELD_TYPE_MESSAGE | FIELD_ID_ATOM_STATS | FIELD_COUNT_REPEATED);
            proto.write(FIELD_TYPE_INT32 | FIELD_ID_ATOM_STATS_TAG, (int32_t)i);
            proto.write(FIELD_TYPE_INT32 | FIELD_ID_ATOM_STATS_COUNT, mPushedAtomStats[i]);
            int errors = getPushedAtomErrors(i);
            if (errors > 0) {
                proto.write(FIELD_TYPE_INT32 | FIELD_ID_ATOM_STATS_ERROR_COUNT, errors);
            }
            proto.end(token);
        }
    }

    for (const auto& pair : mNonPlatformPushedAtomStats) {
        uint64_t token =
                proto.start(FIELD_TYPE_MESSAGE | FIELD_ID_ATOM_STATS | FIELD_COUNT_REPEATED);
        proto.write(FIELD_TYPE_INT32 | FIELD_ID_ATOM_STATS_TAG, pair.first);
        proto.write(FIELD_TYPE_INT32 | FIELD_ID_ATOM_STATS_COUNT, pair.second);
        int errors = getPushedAtomErrors(pair.first);
        if (errors > 0) {
            proto.write(FIELD_TYPE_INT32 | FIELD_ID_ATOM_STATS_ERROR_COUNT, errors);
        }
        proto.end(token);
    }

    for (const auto& pair : mPulledAtomStats) {
        android::os::statsd::writePullerStatsToStream(pair, &proto);
    }

    for (const auto& pair : mAtomMetricStats) {
        android::os::statsd::writeAtomMetricStatsToStream(pair, &proto);
    }

    if (mAnomalyAlarmRegisteredStats > 0) {
        uint64_t token = proto.start(FIELD_TYPE_MESSAGE | FIELD_ID_ANOMALY_ALARM_STATS);
        proto.write(FIELD_TYPE_INT32 | FIELD_ID_ANOMALY_ALARMS_REGISTERED,
                    mAnomalyAlarmRegisteredStats);
        proto.end(token);
    }

    if (mPeriodicAlarmRegisteredStats > 0) {
        uint64_t token = proto.start(FIELD_TYPE_MESSAGE | FIELD_ID_PERIODIC_ALARM_STATS);
        proto.write(FIELD_TYPE_INT32 | FIELD_ID_PERIODIC_ALARMS_REGISTERED,
                    mPeriodicAlarmRegisteredStats);
        proto.end(token);
    }

    uint64_t uidMapToken = proto.start(FIELD_TYPE_MESSAGE | FIELD_ID_UIDMAP_STATS);
    proto.write(FIELD_TYPE_INT32 | FIELD_ID_UID_MAP_CHANGES, mUidMapStats.changes);
    proto.write(FIELD_TYPE_INT32 | FIELD_ID_UID_MAP_BYTES_USED, mUidMapStats.bytes_used);
    proto.write(FIELD_TYPE_INT32 | FIELD_ID_UID_MAP_DROPPED_CHANGES, mUidMapStats.dropped_changes);
    proto.write(FIELD_TYPE_INT32 | FIELD_ID_UID_MAP_DELETED_APPS, mUidMapStats.deleted_apps);
    proto.end(uidMapToken);

    for (const auto& error : mLogLossStats) {
        uint64_t token = proto.start(FIELD_TYPE_MESSAGE | FIELD_ID_LOGGER_ERROR_STATS |
                                      FIELD_COUNT_REPEATED);
        proto.write(FIELD_TYPE_INT32 | FIELD_ID_LOG_LOSS_STATS_TIME, error.mWallClockSec);
        proto.write(FIELD_TYPE_INT32 | FIELD_ID_LOG_LOSS_STATS_COUNT, error.mCount);
        proto.write(FIELD_TYPE_INT32 | FIELD_ID_LOG_LOSS_STATS_ERROR, error.mLastError);
        proto.write(FIELD_TYPE_INT32 | FIELD_ID_LOG_LOSS_STATS_TAG, error.mLastTag);
        proto.write(FIELD_TYPE_INT32 | FIELD_ID_LOG_LOSS_STATS_UID, error.mUid);
        proto.write(FIELD_TYPE_INT32 | FIELD_ID_LOG_LOSS_STATS_PID, error.mPid);
        proto.end(token);
    }

    if (mOverflowCount > 0) {
        uint64_t token = proto.start(FIELD_TYPE_MESSAGE | FIELD_ID_OVERFLOW);
        proto.write(FIELD_TYPE_INT32 | FIELD_ID_OVERFLOW_COUNT, (int32_t)mOverflowCount);
        proto.write(FIELD_TYPE_INT64 | FIELD_ID_OVERFLOW_MAX_HISTORY,
                    (long long)mMaxQueueHistoryNs);
        proto.write(FIELD_TYPE_INT64 | FIELD_ID_OVERFLOW_MIN_HISTORY,
                    (long long)mMinQueueHistoryNs);
        proto.end(token);
    }

    for (const auto& restart : mSystemServerRestartSec) {
        proto.write(FIELD_TYPE_INT32 | FIELD_ID_SYSTEM_SERVER_RESTART | FIELD_COUNT_REPEATED,
                    restart);
    }

    for (const auto& pair: mActivationBroadcastGuardrailStats) {
        uint64_t token = proto.start(FIELD_TYPE_MESSAGE |
                                     FIELD_ID_ACTIVATION_BROADCAST_GUARDRAIL |
                                     FIELD_COUNT_REPEATED);
        proto.write(FIELD_TYPE_INT32 | FIELD_ID_ACTIVATION_BROADCAST_GUARDRAIL_UID,
                    (int32_t) pair.first);
        for (const auto& guardrailHitTime : pair.second) {
            proto.write(FIELD_TYPE_INT32 | FIELD_ID_ACTIVATION_BROADCAST_GUARDRAIL_TIME |
                            FIELD_COUNT_REPEATED,
                        guardrailHitTime);
        }
        proto.end(token);
    }

    output->clear();
    size_t bufferSize = proto.size();
    output->resize(bufferSize);

    size_t pos = 0;
    sp<android::util::ProtoReader> reader = proto.data();
    while (reader->readBuffer() != NULL) {
        size_t toRead = reader->currentToRead();
        std::memcpy(&((*output)[pos]), reader->readBuffer(), toRead);
        pos += toRead;
        reader->move(toRead);
    }

    if (reset) {
        resetInternalLocked();
    }

    VLOG("reset=%d, returned proto size %lu", reset, (unsigned long)bufferSize);
}

}  // namespace statsd
}  // namespace os
}  // namespace android