6a5c94364c
Internal implementation of the puller API. Registers pullers by putting them in the kAllPullAtomInfo map. Implements the actual pull, with condition variables to timeout. Lastly, keys the kAllPullAtom info by a PullerKey, which is a uid and atom id. However, the uid is just set to a default of -1 for now. I will work the security implementation in a follow up CL. Test: builds, boots Test: I will write unit tests in the future. It's very difficult to write any without StatsEvent being completed. Change-Id: Id602dd297b6ba7df811e2d5ab2e77efc0684e418
115 lines
3.4 KiB
C++
115 lines
3.4 KiB
C++
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define DEBUG false // STOPSHIP if true
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#include "Log.h"
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#include "StatsPuller.h"
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#include "StatsPullerManager.h"
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#include "guardrail/StatsdStats.h"
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#include "puller_util.h"
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#include "stats_log_util.h"
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namespace android {
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namespace os {
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namespace statsd {
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using std::lock_guard;
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sp<UidMap> StatsPuller::mUidMap = nullptr;
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void StatsPuller::SetUidMap(const sp<UidMap>& uidMap) { mUidMap = uidMap; }
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StatsPuller::StatsPuller(const int tagId)
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: mTagId(tagId), mLastPullTimeNs(0) {
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}
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bool StatsPuller::Pull(std::vector<std::shared_ptr<LogEvent>>* data) {
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lock_guard<std::mutex> lock(mLock);
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int64_t elapsedTimeNs = getElapsedRealtimeNs();
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StatsdStats::getInstance().notePull(mTagId);
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const bool shouldUseCache =
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elapsedTimeNs - mLastPullTimeNs <
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StatsPullerManager::kAllPullAtomInfo.at({.atomTag = mTagId}).coolDownNs;
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if (shouldUseCache) {
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if (mHasGoodData) {
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(*data) = mCachedData;
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StatsdStats::getInstance().notePullFromCache(mTagId);
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}
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return mHasGoodData;
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}
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if (mLastPullTimeNs > 0) {
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StatsdStats::getInstance().updateMinPullIntervalSec(
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mTagId, (elapsedTimeNs - mLastPullTimeNs) / NS_PER_SEC);
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}
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mCachedData.clear();
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mLastPullTimeNs = elapsedTimeNs;
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mHasGoodData = PullInternal(&mCachedData);
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if (!mHasGoodData) {
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return mHasGoodData;
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}
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const int64_t pullDurationNs = getElapsedRealtimeNs() - elapsedTimeNs;
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StatsdStats::getInstance().notePullTime(mTagId, pullDurationNs);
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const bool pullTimeOut =
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pullDurationNs >
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StatsPullerManager::kAllPullAtomInfo.at({.atomTag = mTagId}).pullTimeoutNs;
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if (pullTimeOut) {
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// Something went wrong. Discard the data.
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clearCacheLocked();
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mHasGoodData = false;
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StatsdStats::getInstance().notePullTimeout(mTagId);
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ALOGW("Pull for atom %d exceeds timeout %lld nano seconds.", mTagId,
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(long long)pullDurationNs);
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return mHasGoodData;
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}
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if (mCachedData.size() > 0) {
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mapAndMergeIsolatedUidsToHostUid(mCachedData, mUidMap, mTagId);
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}
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(*data) = mCachedData;
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return mHasGoodData;
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}
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int StatsPuller::ForceClearCache() {
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return clearCache();
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}
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int StatsPuller::clearCache() {
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lock_guard<std::mutex> lock(mLock);
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return clearCacheLocked();
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}
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int StatsPuller::clearCacheLocked() {
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int ret = mCachedData.size();
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mCachedData.clear();
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mLastPullTimeNs = 0;
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return ret;
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}
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int StatsPuller::ClearCacheIfNecessary(int64_t timestampNs) {
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if (timestampNs - mLastPullTimeNs >
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StatsPullerManager::kAllPullAtomInfo.at({.atomTag = mTagId}).coolDownNs) {
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return clearCache();
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} else {
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return 0;
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}
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}
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} // namespace statsd
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} // namespace os
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} // namespace android
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