| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "components/cronet/histogram_manager.h" |
| |
| #include <string> |
| #include <vector> |
| |
| #include "base/lazy_instance.h" |
| #include "base/metrics/histogram_macros.h" |
| #include "base/metrics/histogram_samples.h" |
| #include "base/metrics/statistics_recorder.h" |
| #include "components/metrics/histogram_encoder.h" |
| |
| namespace cronet { |
| |
| // TODO(rtenneti): move g_histogram_manager into java code. |
| static base::LazyInstance<HistogramManager>::Leaky |
| g_histogram_manager = LAZY_INSTANCE_INITIALIZER; |
| |
| HistogramManager::HistogramManager() : histogram_snapshot_manager_(this) { |
| } |
| |
| HistogramManager::~HistogramManager() { |
| } |
| |
| // static |
| HistogramManager* HistogramManager::GetInstance() { |
| return g_histogram_manager.Pointer(); |
| } |
| |
| void HistogramManager::RecordDelta(const base::HistogramBase& histogram, |
| const base::HistogramSamples& snapshot) { |
| EncodeHistogramDelta(histogram.histogram_name(), snapshot, &uma_proto_); |
| } |
| |
| void HistogramManager::InconsistencyDetected( |
| base::HistogramBase::Inconsistency problem) { |
| UMA_HISTOGRAM_ENUMERATION("Histogram.InconsistenciesBrowser.Cronet", |
| problem, base::HistogramBase::NEVER_EXCEEDED_VALUE); |
| } |
| |
| void HistogramManager::UniqueInconsistencyDetected( |
| base::HistogramBase::Inconsistency problem) { |
| UMA_HISTOGRAM_ENUMERATION("Histogram.InconsistenciesBrowserUnique.Cronet", |
| problem, base::HistogramBase::NEVER_EXCEEDED_VALUE); |
| } |
| |
| void HistogramManager::InconsistencyDetectedInLoggedCount(int amount) { |
| UMA_HISTOGRAM_COUNTS("Histogram.InconsistentSnapshotBrowser.Cronet", |
| std::abs(amount)); |
| } |
| |
| bool HistogramManager::GetDeltas(std::vector<uint8_t>* data) { |
| if (get_deltas_lock_.Try()) { |
| base::AutoLock lock(get_deltas_lock_, base::AutoLock::AlreadyAcquired()); |
| // Clear the protobuf between calls. |
| uma_proto_.Clear(); |
| // "false" to StatisticsRecorder::begin() indicates to *not* include |
| // histograms held in persistent storage on the assumption that they will be |
| // visible to the recipient through other means. |
| histogram_snapshot_manager_.PrepareDeltas( |
| base::StatisticsRecorder::begin(false), base::StatisticsRecorder::end(), |
| base::Histogram::kNoFlags, base::Histogram::kUmaTargetedHistogramFlag); |
| int32_t data_size = uma_proto_.ByteSize(); |
| data->resize(data_size); |
| if (uma_proto_.SerializeToArray(&(*data)[0], data_size)) |
| return true; |
| } |
| data->clear(); |
| return false; |
| } |
| |
| } // namespace cronet |