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Diffstat (limited to 'chromium/base/android/record_histogram.cc')
| -rw-r--r-- | chromium/base/android/record_histogram.cc | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/chromium/base/android/record_histogram.cc b/chromium/base/android/record_histogram.cc new file mode 100644 index 00000000000..9a68deca54f --- /dev/null +++ b/chromium/base/android/record_histogram.cc @@ -0,0 +1,245 @@ +// 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 "base/android/record_histogram.h" + +#include <map> + +#include "base/android/jni_android.h" +#include "base/android/jni_string.h" +#include "base/lazy_instance.h" +#include "base/metrics/histogram.h" +#include "base/metrics/sparse_histogram.h" +#include "base/metrics/statistics_recorder.h" +#include "base/synchronization/lock.h" +#include "base/time/time.h" +#include "jni/RecordHistogram_jni.h" + +namespace base { +namespace android { +namespace { + +// Simple thread-safe wrapper for caching histograms. This avoids +// relatively expensive JNI string translation for each recording. +class HistogramCache { + public: + HistogramCache() {} + + HistogramBase* BooleanHistogram(JNIEnv* env, + jstring j_histogram_name, + jint j_histogram_key) { + DCHECK(j_histogram_name); + DCHECK(j_histogram_key); + HistogramBase* histogram = FindLocked(j_histogram_key); + if (histogram) + return histogram; + + std::string histogram_name = ConvertJavaStringToUTF8(env, j_histogram_name); + histogram = BooleanHistogram::FactoryGet( + histogram_name, HistogramBase::kUmaTargetedHistogramFlag); + return InsertLocked(j_histogram_key, histogram); + } + + HistogramBase* EnumeratedHistogram(JNIEnv* env, + jstring j_histogram_name, + jint j_histogram_key, + jint j_boundary) { + DCHECK(j_histogram_name); + DCHECK(j_histogram_key); + HistogramBase* histogram = FindLocked(j_histogram_key); + int boundary = static_cast<int>(j_boundary); + if (histogram) { + DCHECK(histogram->HasConstructionArguments(1, boundary, boundary + 1)); + return histogram; + } + + std::string histogram_name = ConvertJavaStringToUTF8(env, j_histogram_name); + histogram = + LinearHistogram::FactoryGet(histogram_name, 1, boundary, boundary + 1, + HistogramBase::kUmaTargetedHistogramFlag); + return InsertLocked(j_histogram_key, histogram); + } + + HistogramBase* CustomCountHistogram(JNIEnv* env, + jstring j_histogram_name, + jint j_histogram_key, + jint j_min, + jint j_max, + jint j_num_buckets) { + DCHECK(j_histogram_name); + DCHECK(j_histogram_key); + int64 min = static_cast<int64>(j_min); + int64 max = static_cast<int64>(j_max); + int num_buckets = static_cast<int>(j_num_buckets); + HistogramBase* histogram = FindLocked(j_histogram_key); + if (histogram) { + DCHECK(histogram->HasConstructionArguments(min, max, num_buckets)); + return histogram; + } + + std::string histogram_name = ConvertJavaStringToUTF8(env, j_histogram_name); + histogram = + Histogram::FactoryGet(histogram_name, min, max, num_buckets, + HistogramBase::kUmaTargetedHistogramFlag); + return InsertLocked(j_histogram_key, histogram); + } + + HistogramBase* SparseHistogram(JNIEnv* env, + jstring j_histogram_name, + jint j_histogram_key) { + DCHECK(j_histogram_name); + DCHECK(j_histogram_key); + HistogramBase* histogram = FindLocked(j_histogram_key); + if (histogram) + return histogram; + + std::string histogram_name = ConvertJavaStringToUTF8(env, j_histogram_name); + histogram = SparseHistogram::FactoryGet( + histogram_name, HistogramBase::kUmaTargetedHistogramFlag); + return InsertLocked(j_histogram_key, histogram); + } + + HistogramBase* CustomTimesHistogram(JNIEnv* env, + jstring j_histogram_name, + jint j_histogram_key, + jlong j_min, + jlong j_max, + jint j_bucket_count) { + DCHECK(j_histogram_name); + DCHECK(j_histogram_key); + HistogramBase* histogram = FindLocked(j_histogram_key); + int64 min = static_cast<int64>(j_min); + int64 max = static_cast<int64>(j_max); + int bucket_count = static_cast<int>(j_bucket_count); + if (histogram) { + DCHECK(histogram->HasConstructionArguments(min, max, bucket_count)); + return histogram; + } + + std::string histogram_name = ConvertJavaStringToUTF8(env, j_histogram_name); + // This intentionally uses FactoryGet and not FactoryTimeGet. FactoryTimeGet + // is just a convenience for constructing the underlying Histogram with + // TimeDelta arguments. + histogram = Histogram::FactoryGet(histogram_name, min, max, bucket_count, + HistogramBase::kUmaTargetedHistogramFlag); + return InsertLocked(j_histogram_key, histogram); + } + + private: + HistogramBase* FindLocked(jint j_histogram_key) { + base::AutoLock locked(lock_); + auto histogram_it = histograms_.find(j_histogram_key); + return histogram_it != histograms_.end() ? histogram_it->second : nullptr; + } + + HistogramBase* InsertLocked(jint j_histogram_key, HistogramBase* histogram) { + base::AutoLock locked(lock_); + histograms_.insert(std::make_pair(j_histogram_key, histogram)); + return histogram; + } + + base::Lock lock_; + std::map<jint, HistogramBase*> histograms_; + + DISALLOW_COPY_AND_ASSIGN(HistogramCache); +}; + +base::LazyInstance<HistogramCache>::Leaky g_histograms; + +} // namespace + +void RecordBooleanHistogram(JNIEnv* env, + jclass clazz, + jstring j_histogram_name, + jint j_histogram_key, + jboolean j_sample) { + bool sample = static_cast<bool>(j_sample); + g_histograms.Get() + .BooleanHistogram(env, j_histogram_name, j_histogram_key) + ->AddBoolean(sample); +} + +void RecordEnumeratedHistogram(JNIEnv* env, + jclass clazz, + jstring j_histogram_name, + jint j_histogram_key, + jint j_sample, + jint j_boundary) { + int sample = static_cast<int>(j_sample); + + g_histograms.Get() + .EnumeratedHistogram(env, j_histogram_name, j_histogram_key, j_boundary) + ->Add(sample); +} + +void RecordCustomCountHistogram(JNIEnv* env, + jclass clazz, + jstring j_histogram_name, + jint j_histogram_key, + jint j_sample, + jint j_min, + jint j_max, + jint j_num_buckets) { + int sample = static_cast<int>(j_sample); + + g_histograms.Get() + .CustomCountHistogram(env, j_histogram_name, j_histogram_key, j_min, + j_max, j_num_buckets) + ->Add(sample); +} + +void RecordSparseHistogram(JNIEnv* env, + jclass clazz, + jstring j_histogram_name, + jint j_histogram_key, + jint j_sample) { + int sample = static_cast<int>(j_sample); + g_histograms.Get() + .SparseHistogram(env, j_histogram_name, j_histogram_key) + ->Add(sample); +} + +void RecordCustomTimesHistogramMilliseconds(JNIEnv* env, + jclass clazz, + jstring j_histogram_name, + jint j_histogram_key, + jlong j_duration, + jlong j_min, + jlong j_max, + jint j_num_buckets) { + g_histograms.Get() + .CustomTimesHistogram(env, j_histogram_name, j_histogram_key, j_min, + j_max, j_num_buckets) + ->AddTime(TimeDelta::FromMilliseconds(static_cast<int64>(j_duration))); +} + +void Initialize(JNIEnv* env, jclass) { + StatisticsRecorder::Initialize(); +} + +// This backs a Java test util for testing histograms - +// MetricsUtils.HistogramDelta. It should live in a test-specific file, but we +// currently can't have test-specific native code packaged in test-specific Java +// targets - see http://crbug.com/415945. +jint GetHistogramValueCountForTesting(JNIEnv* env, + jclass clazz, + jstring histogram_name, + jint sample) { + HistogramBase* histogram = StatisticsRecorder::FindHistogram( + android::ConvertJavaStringToUTF8(env, histogram_name)); + if (histogram == nullptr) { + // No samples have been recorded for this histogram (yet?). + return 0; + } + + scoped_ptr<HistogramSamples> samples = histogram->SnapshotSamples(); + return samples->GetCount(static_cast<int>(sample)); +} + +bool RegisterRecordHistogram(JNIEnv* env) { + return RegisterNativesImpl(env); +} + +} // namespace android +} // namespace base |