1 /*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #define STATSD_DEBUG false // STOPSHIP if true
18 #include "Log.h"
19
20 #include "StatsPuller.h"
21 #include "StatsPullerManager.h"
22 #include "guardrail/StatsdStats.h"
23 #include "puller_util.h"
24 #include "stats_log_util.h"
25
26 namespace android {
27 namespace os {
28 namespace statsd {
29
30 using std::lock_guard;
31
32 sp<UidMap> StatsPuller::mUidMap = nullptr;
SetUidMap(const sp<UidMap> & uidMap)33 void StatsPuller::SetUidMap(const sp<UidMap>& uidMap) { mUidMap = uidMap; }
34
StatsPuller(const int tagId,const int64_t coolDownNs,const int64_t pullTimeoutNs,const std::vector<int> additiveFields)35 StatsPuller::StatsPuller(const int tagId, const int64_t coolDownNs, const int64_t pullTimeoutNs,
36 const std::vector<int> additiveFields)
37 : mTagId(tagId),
38 mPullTimeoutNs(pullTimeoutNs),
39 mCoolDownNs(coolDownNs),
40 mAdditiveFields(additiveFields),
41 mLastPullTimeNs(0),
42 mLastEventTimeNs(0) {
43 }
44
Pull(const int64_t eventTimeNs,std::vector<std::shared_ptr<LogEvent>> * data)45 PullErrorCode StatsPuller::Pull(const int64_t eventTimeNs,
46 std::vector<std::shared_ptr<LogEvent>>* data) {
47 lock_guard<std::mutex> lock(mLock);
48 const int64_t elapsedTimeNs = getElapsedRealtimeNs();
49 const int64_t systemUptimeMillis = getSystemUptimeMillis();
50 StatsdStats::getInstance().notePull(mTagId);
51 const bool shouldUseCache =
52 (mLastEventTimeNs == eventTimeNs) || (elapsedTimeNs - mLastPullTimeNs < mCoolDownNs);
53 if (shouldUseCache) {
54 if (mHasGoodData) {
55 (*data) = mCachedData;
56 StatsdStats::getInstance().notePullFromCache(mTagId);
57
58 }
59 return mHasGoodData ? PULL_SUCCESS : PULL_FAIL;
60 }
61 if (mLastPullTimeNs > 0) {
62 StatsdStats::getInstance().updateMinPullIntervalSec(
63 mTagId, (elapsedTimeNs - mLastPullTimeNs) / NS_PER_SEC);
64 }
65 mCachedData.clear();
66 mLastPullTimeNs = elapsedTimeNs;
67 mLastEventTimeNs = eventTimeNs;
68 PullErrorCode status = PullInternal(&mCachedData);
69 mHasGoodData = (status == PULL_SUCCESS);
70 if (!mHasGoodData) {
71 return status;
72 }
73 const int64_t pullElapsedDurationNs = getElapsedRealtimeNs() - elapsedTimeNs;
74 const int64_t pullSystemUptimeDurationMillis = getSystemUptimeMillis() - systemUptimeMillis;
75 StatsdStats::getInstance().notePullTime(mTagId, pullElapsedDurationNs);
76 const bool pullTimeOut = pullElapsedDurationNs > mPullTimeoutNs;
77 if (pullTimeOut) {
78 // Something went wrong. Discard the data.
79 mCachedData.clear();
80 mHasGoodData = false;
81 StatsdStats::getInstance().notePullTimeout(
82 mTagId, pullSystemUptimeDurationMillis, NanoToMillis(pullElapsedDurationNs));
83 ALOGW("Pull for atom %d exceeds timeout %lld nano seconds.", mTagId,
84 (long long)pullElapsedDurationNs);
85 return PULL_FAIL;
86 }
87
88 if (mCachedData.size() > 0) {
89 mapAndMergeIsolatedUidsToHostUid(mCachedData, mUidMap, mTagId, mAdditiveFields);
90 }
91
92 if (mCachedData.empty()) {
93 VLOG("Data pulled is empty");
94 StatsdStats::getInstance().noteEmptyData(mTagId);
95 }
96
97 (*data) = mCachedData;
98 return PULL_SUCCESS;
99 }
100
ForceClearCache()101 int StatsPuller::ForceClearCache() {
102 return clearCache();
103 }
104
clearCache()105 int StatsPuller::clearCache() {
106 lock_guard<std::mutex> lock(mLock);
107 return clearCacheLocked();
108 }
109
clearCacheLocked()110 int StatsPuller::clearCacheLocked() {
111 int ret = mCachedData.size();
112 mCachedData.clear();
113 mLastPullTimeNs = 0;
114 mLastEventTimeNs = 0;
115 return ret;
116 }
117
ClearCacheIfNecessary(int64_t timestampNs)118 int StatsPuller::ClearCacheIfNecessary(int64_t timestampNs) {
119 if (timestampNs - mLastPullTimeNs > mCoolDownNs) {
120 return clearCache();
121 } else {
122 return 0;
123 }
124 }
125
126 } // namespace statsd
127 } // namespace os
128 } // namespace android
129