mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-11-24 22:36:09 +03:00
82 lines
2.7 KiB
C++
82 lines
2.7 KiB
C++
|
// Copyright 2013 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 "base/metrics/histogram_delta_serialization.h"
|
||
|
|
|
||
|
|
#include "base/logging.h"
|
||
|
|
#include "base/metrics/histogram_base.h"
|
||
|
|
#include "base/metrics/histogram_snapshot_manager.h"
|
||
|
|
#include "base/metrics/statistics_recorder.h"
|
||
|
|
#include "base/numerics/safe_conversions.h"
|
||
|
|
#include "base/pickle.h"
|
||
|
|
#include "base/values.h"
|
||
|
|
|
||
|
|
namespace base {
|
||
|
|
|
||
|
|
namespace {
|
||
|
|
|
||
|
|
// Create or find existing histogram and add the samples from pickle.
|
||
|
|
// Silently returns when seeing any data problem in the pickle.
|
||
|
|
void DeserializeHistogramAndAddSamples(PickleIterator* iter) {
|
||
|
|
HistogramBase* histogram = DeserializeHistogramInfo(iter);
|
||
|
|
if (!histogram)
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (histogram->flags() & HistogramBase::kIPCSerializationSourceFlag) {
|
||
|
|
DVLOG(1) << "Single process mode, histogram observed and not copied: "
|
||
|
|
<< histogram->histogram_name();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
histogram->AddSamplesFromPickle(iter);
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace
|
||
|
|
|
||
|
|
HistogramDeltaSerialization::HistogramDeltaSerialization(
|
||
|
|
const std::string& caller_name)
|
||
|
|
: histogram_snapshot_manager_(this), serialized_deltas_(nullptr) {}
|
||
|
|
|
||
|
|
HistogramDeltaSerialization::~HistogramDeltaSerialization() = default;
|
||
|
|
|
||
|
|
void HistogramDeltaSerialization::PrepareAndSerializeDeltas(
|
||
|
|
std::vector<std::string>* serialized_deltas,
|
||
|
|
bool include_persistent) {
|
||
|
|
DCHECK(thread_checker_.CalledOnValidThread());
|
||
|
|
|
||
|
|
serialized_deltas_ = serialized_deltas;
|
||
|
|
// Note: Before serializing, we set the kIPCSerializationSourceFlag for all
|
||
|
|
// the histograms, so that the receiving process can distinguish them from the
|
||
|
|
// local histograms.
|
||
|
|
StatisticsRecorder::PrepareDeltas(
|
||
|
|
include_persistent, Histogram::kIPCSerializationSourceFlag,
|
||
|
|
Histogram::kNoFlags, &histogram_snapshot_manager_);
|
||
|
|
serialized_deltas_ = nullptr;
|
||
|
|
}
|
||
|
|
|
||
|
|
// static
|
||
|
|
void HistogramDeltaSerialization::DeserializeAndAddSamples(
|
||
|
|
const std::vector<std::string>& serialized_deltas) {
|
||
|
|
for (std::vector<std::string>::const_iterator it = serialized_deltas.begin();
|
||
|
|
it != serialized_deltas.end(); ++it) {
|
||
|
|
Pickle pickle(it->data(), checked_cast<int>(it->size()));
|
||
|
|
PickleIterator iter(pickle);
|
||
|
|
DeserializeHistogramAndAddSamples(&iter);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void HistogramDeltaSerialization::RecordDelta(
|
||
|
|
const HistogramBase& histogram,
|
||
|
|
const HistogramSamples& snapshot) {
|
||
|
|
DCHECK(thread_checker_.CalledOnValidThread());
|
||
|
|
DCHECK_NE(0, snapshot.TotalCount());
|
||
|
|
|
||
|
|
Pickle pickle;
|
||
|
|
histogram.SerializeInfo(&pickle);
|
||
|
|
snapshot.Serialize(&pickle);
|
||
|
|
serialized_deltas_->push_back(
|
||
|
|
std::string(static_cast<const char*>(pickle.data()), pickle.size()));
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace base
|