1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
/*
* Copyright 2018, The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define DEBUG false // STOPSHIP if true
#include "Log.h"
#include "StateTracker.h"
#include "guardrail/StatsdStats.h"
namespace android {
namespace os {
namespace statsd {
using std::string;
using std::unordered_set;
using std::vector;
StateTracker::StateTracker(const ConfigKey& key, const int64_t& id, const int index,
const SimplePredicate& simplePredicate,
const unordered_map<int64_t, int>& trackerNameIndexMap,
const vector<Matcher> primaryKeys)
: ConditionTracker(id, index), mConfigKey(key), mPrimaryKeys(primaryKeys) {
if (simplePredicate.has_start()) {
auto pair = trackerNameIndexMap.find(simplePredicate.start());
if (pair == trackerNameIndexMap.end()) {
ALOGW("Start matcher %lld not found in the config", (long long)simplePredicate.start());
return;
}
mStartLogMatcherIndex = pair->second;
mTrackerIndex.insert(mStartLogMatcherIndex);
} else {
ALOGW("Condition %lld must have a start matcher", (long long)id);
return;
}
if (simplePredicate.has_dimensions()) {
translateFieldMatcher(simplePredicate.dimensions(), &mOutputDimensions);
if (mOutputDimensions.size() > 0) {
mSliced = true;
mDimensionTag = mOutputDimensions[0].mMatcher.getTag();
} else {
ALOGW("Condition %lld has invalid dimensions", (long long)id);
return;
}
} else {
ALOGW("Condition %lld being a state tracker, but has no dimension", (long long)id);
return;
}
if (simplePredicate.initial_value() == SimplePredicate_InitialValue_FALSE) {
mInitialValue = ConditionState::kFalse;
} else {
mInitialValue = ConditionState::kUnknown;
}
mNonSlicedConditionState = mInitialValue;
mInitialized = true;
}
StateTracker::~StateTracker() {
VLOG("~StateTracker()");
}
bool StateTracker::init(const vector<Predicate>& allConditionConfig,
const vector<sp<ConditionTracker>>& allConditionTrackers,
const unordered_map<int64_t, int>& conditionIdIndexMap,
vector<bool>& stack) {
return mInitialized;
}
void StateTracker::dumpState() {
VLOG("StateTracker %lld DUMP:", (long long)mConditionId);
for (const auto& value : mSlicedState) {
VLOG("\t%s -> %s", value.first.toString().c_str(), value.second.toString().c_str());
}
VLOG("Last Changed to True: ");
for (const auto& value : mLastChangedToTrueDimensions) {
VLOG("%s", value.toString().c_str());
}
VLOG("Last Changed to False: ");
for (const auto& value : mLastChangedToFalseDimensions) {
VLOG("%s", value.toString().c_str());
}
}
bool StateTracker::hitGuardRail(const HashableDimensionKey& newKey) {
if (mSlicedState.find(newKey) != mSlicedState.end()) {
// if the condition is not sliced or the key is not new, we are good!
return false;
}
// 1. Report the tuple count if the tuple count > soft limit
if (mSlicedState.size() > StatsdStats::kDimensionKeySizeSoftLimit - 1) {
size_t newTupleCount = mSlicedState.size() + 1;
StatsdStats::getInstance().noteConditionDimensionSize(mConfigKey, mConditionId, newTupleCount);
// 2. Don't add more tuples, we are above the allowed threshold. Drop the data.
if (newTupleCount > StatsdStats::kDimensionKeySizeHardLimit) {
ALOGE("Predicate %lld dropping data for dimension key %s",
(long long)mConditionId, newKey.toString().c_str());
return true;
}
}
return false;
}
void StateTracker::evaluateCondition(const LogEvent& event,
const vector<MatchingState>& eventMatcherValues,
const vector<sp<ConditionTracker>>& mAllConditions,
vector<ConditionState>& conditionCache,
vector<bool>& conditionChangedCache) {
mLastChangedToTrueDimensions.clear();
mLastChangedToFalseDimensions.clear();
if (conditionCache[mIndex] != ConditionState::kNotEvaluated) {
// it has been evaluated.
VLOG("Yes, already evaluated, %lld %d", (long long)mConditionId, conditionCache[mIndex]);
return;
}
if (mStartLogMatcherIndex >= 0 &&
eventMatcherValues[mStartLogMatcherIndex] != MatchingState::kMatched) {
conditionCache[mIndex] =
mSlicedState.size() > 0 ? ConditionState::kTrue : ConditionState::kFalse;
conditionChangedCache[mIndex] = false;
return;
}
VLOG("StateTracker evaluate event %s", event.ToString().c_str());
// Primary key can exclusive fields must be simple fields. so there won't be more than
// one keys matched.
HashableDimensionKey primaryKey;
HashableDimensionKey state;
if ((mPrimaryKeys.size() > 0 && !filterValues(mPrimaryKeys, event.getValues(), &primaryKey)) ||
!filterValues(mOutputDimensions, event.getValues(), &state)) {
ALOGE("Failed to filter fields in the event?? panic now!");
conditionCache[mIndex] =
mSlicedState.size() > 0 ? ConditionState::kTrue : ConditionState::kFalse;
conditionChangedCache[mIndex] = false;
return;
}
hitGuardRail(primaryKey);
VLOG("StateTracker: key %s state %s", primaryKey.toString().c_str(), state.toString().c_str());
auto it = mSlicedState.find(primaryKey);
if (it == mSlicedState.end()) {
mSlicedState[primaryKey] = state;
conditionCache[mIndex] = ConditionState::kTrue;
mLastChangedToTrueDimensions.insert(state);
conditionChangedCache[mIndex] = true;
} else if (!(it->second == state)) {
mLastChangedToFalseDimensions.insert(it->second);
mLastChangedToTrueDimensions.insert(state);
mSlicedState[primaryKey] = state;
conditionCache[mIndex] = ConditionState::kTrue;
conditionChangedCache[mIndex] = true;
} else {
conditionCache[mIndex] = ConditionState::kTrue;
conditionChangedCache[mIndex] = false;
}
if (DEBUG) {
dumpState();
}
return;
}
void StateTracker::isConditionMet(
const ConditionKey& conditionParameters, const vector<sp<ConditionTracker>>& allConditions,
const vector<Matcher>& dimensionFields,
const bool isSubOutputDimensionFields,
const bool isPartialLink,
vector<ConditionState>& conditionCache,
std::unordered_set<HashableDimensionKey>& dimensionsKeySet) const {
if (conditionCache[mIndex] != ConditionState::kNotEvaluated) {
// it has been evaluated.
VLOG("Yes, already evaluated, %lld %d", (long long)mConditionId, conditionCache[mIndex]);
return;
}
const auto pair = conditionParameters.find(mConditionId);
if (pair == conditionParameters.end()) {
if (mSlicedState.size() > 0) {
conditionCache[mIndex] = ConditionState::kTrue;
for (const auto& state : mSlicedState) {
dimensionsKeySet.insert(state.second);
}
} else {
conditionCache[mIndex] = ConditionState::kUnknown;
}
return;
}
const auto& primaryKey = pair->second;
conditionCache[mIndex] = mInitialValue;
auto it = mSlicedState.find(primaryKey);
if (it != mSlicedState.end()) {
conditionCache[mIndex] = ConditionState::kTrue;
dimensionsKeySet.insert(it->second);
}
}
ConditionState StateTracker::getMetConditionDimension(
const std::vector<sp<ConditionTracker>>& allConditions,
const vector<Matcher>& dimensionFields,
const bool isSubOutputDimensionFields,
std::unordered_set<HashableDimensionKey>& dimensionsKeySet) const {
if (mSlicedState.size() > 0) {
for (const auto& state : mSlicedState) {
dimensionsKeySet.insert(state.second);
}
return ConditionState::kTrue;
}
return mInitialValue;
}
} // namespace statsd
} // namespace os
} // namespace android
|
