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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "base/android/record_histogram.h" | |
| 6 | |
| 7 #include <map> | |
| 8 | |
| 9 #include "base/android/jni_android.h" | |
| 10 #include "base/android/jni_string.h" | |
| 11 #include "base/lazy_instance.h" | |
| 12 #include "base/metrics/histogram.h" | |
| 13 #include "base/metrics/sparse_histogram.h" | |
| 14 #include "base/metrics/statistics_recorder.h" | |
| 15 #include "base/synchronization/lock.h" | |
| 16 #include "base/time/time.h" | |
| 17 #include "jni/RecordHistogram_jni.h" | |
| 18 | |
| 19 namespace base { | |
| 20 namespace android { | |
| 21 namespace { | |
| 22 | |
| 23 // Simple thread-safe wrapper for caching histograms. This avoids | |
| 24 // relatively expensive JNI string translation for each recording. | |
| 25 class HistogramCache { | |
| 26 public: | |
| 27 HistogramCache() {} | |
| 28 | |
| 29 HistogramBase* BooleanHistogram(JNIEnv* env, | |
| 30 jstring j_histogram_name, | |
| 31 jint j_histogram_key) { | |
| 32 DCHECK(j_histogram_name); | |
| 33 DCHECK(j_histogram_key); | |
| 34 HistogramBase* histogram = FindLocked(j_histogram_key); | |
| 35 if (histogram) | |
| 36 return histogram; | |
| 37 | |
| 38 std::string histogram_name = ConvertJavaStringToUTF8(env, j_histogram_name); | |
| 39 histogram = BooleanHistogram::FactoryGet( | |
| 40 histogram_name, HistogramBase::kUmaTargetedHistogramFlag); | |
| 41 return InsertLocked(j_histogram_key, histogram); | |
| 42 } | |
| 43 | |
| 44 HistogramBase* EnumeratedHistogram(JNIEnv* env, | |
| 45 jstring j_histogram_name, | |
| 46 jint j_histogram_key, | |
| 47 jint j_boundary) { | |
| 48 DCHECK(j_histogram_name); | |
| 49 DCHECK(j_histogram_key); | |
| 50 HistogramBase* histogram = FindLocked(j_histogram_key); | |
| 51 int boundary = static_cast<int>(j_boundary); | |
| 52 if (histogram) { | |
| 53 DCHECK(histogram->HasConstructionArguments(1, boundary, boundary + 1)); | |
| 54 return histogram; | |
| 55 } | |
| 56 | |
| 57 std::string histogram_name = ConvertJavaStringToUTF8(env, j_histogram_name); | |
| 58 histogram = | |
| 59 LinearHistogram::FactoryGet(histogram_name, 1, boundary, boundary + 1, | |
| 60 HistogramBase::kUmaTargetedHistogramFlag); | |
| 61 return InsertLocked(j_histogram_key, histogram); | |
| 62 } | |
| 63 | |
| 64 HistogramBase* CustomCountHistogram(JNIEnv* env, | |
| 65 jstring j_histogram_name, | |
| 66 jint j_histogram_key, | |
| 67 jint j_min, | |
| 68 jint j_max, | |
| 69 jint j_num_buckets) { | |
| 70 DCHECK(j_histogram_name); | |
| 71 DCHECK(j_histogram_key); | |
| 72 int64 min = static_cast<int64>(j_min); | |
| 73 int64 max = static_cast<int64>(j_max); | |
| 74 int num_buckets = static_cast<int>(j_num_buckets); | |
| 75 HistogramBase* histogram = FindLocked(j_histogram_key); | |
| 76 if (histogram) { | |
| 77 DCHECK(histogram->HasConstructionArguments(min, max, num_buckets)); | |
| 78 return histogram; | |
| 79 } | |
| 80 | |
| 81 std::string histogram_name = ConvertJavaStringToUTF8(env, j_histogram_name); | |
| 82 histogram = | |
| 83 Histogram::FactoryGet(histogram_name, min, max, num_buckets, | |
| 84 HistogramBase::kUmaTargetedHistogramFlag); | |
| 85 return InsertLocked(j_histogram_key, histogram); | |
| 86 } | |
| 87 | |
| 88 HistogramBase* SparseHistogram(JNIEnv* env, | |
| 89 jstring j_histogram_name, | |
| 90 jint j_histogram_key) { | |
| 91 DCHECK(j_histogram_name); | |
| 92 DCHECK(j_histogram_key); | |
| 93 HistogramBase* histogram = FindLocked(j_histogram_key); | |
| 94 if (histogram) | |
| 95 return histogram; | |
| 96 | |
| 97 std::string histogram_name = ConvertJavaStringToUTF8(env, j_histogram_name); | |
| 98 histogram = SparseHistogram::FactoryGet( | |
| 99 histogram_name, HistogramBase::kUmaTargetedHistogramFlag); | |
| 100 return InsertLocked(j_histogram_key, histogram); | |
| 101 } | |
| 102 | |
| 103 HistogramBase* CustomTimesHistogram(JNIEnv* env, | |
| 104 jstring j_histogram_name, | |
| 105 jint j_histogram_key, | |
| 106 jlong j_min, | |
| 107 jlong j_max, | |
| 108 jint j_bucket_count) { | |
| 109 DCHECK(j_histogram_name); | |
| 110 DCHECK(j_histogram_key); | |
| 111 HistogramBase* histogram = FindLocked(j_histogram_key); | |
| 112 int64 min = static_cast<int64>(j_min); | |
| 113 int64 max = static_cast<int64>(j_max); | |
| 114 int bucket_count = static_cast<int>(j_bucket_count); | |
| 115 if (histogram) { | |
| 116 DCHECK(histogram->HasConstructionArguments(min, max, bucket_count)); | |
| 117 return histogram; | |
| 118 } | |
| 119 | |
| 120 std::string histogram_name = ConvertJavaStringToUTF8(env, j_histogram_name); | |
| 121 // This intentionally uses FactoryGet and not FactoryTimeGet. FactoryTimeGet | |
| 122 // is just a convenience for constructing the underlying Histogram with | |
| 123 // TimeDelta arguments. | |
| 124 histogram = Histogram::FactoryGet(histogram_name, min, max, bucket_count, | |
| 125 HistogramBase::kUmaTargetedHistogramFlag); | |
| 126 return InsertLocked(j_histogram_key, histogram); | |
| 127 } | |
| 128 | |
| 129 private: | |
| 130 HistogramBase* FindLocked(jint j_histogram_key) { | |
| 131 base::AutoLock locked(lock_); | |
| 132 auto histogram_it = histograms_.find(j_histogram_key); | |
| 133 return histogram_it != histograms_.end() ? histogram_it->second : nullptr; | |
| 134 } | |
| 135 | |
| 136 HistogramBase* InsertLocked(jint j_histogram_key, HistogramBase* histogram) { | |
| 137 base::AutoLock locked(lock_); | |
| 138 histograms_.insert(std::make_pair(j_histogram_key, histogram)); | |
| 139 return histogram; | |
| 140 } | |
| 141 | |
| 142 base::Lock lock_; | |
| 143 std::map<jint, HistogramBase*> histograms_; | |
| 144 | |
| 145 DISALLOW_COPY_AND_ASSIGN(HistogramCache); | |
| 146 }; | |
| 147 | |
| 148 base::LazyInstance<HistogramCache>::Leaky g_histograms; | |
| 149 | |
| 150 } // namespace | |
| 151 | |
| 152 void RecordBooleanHistogram(JNIEnv* env, | |
| 153 jclass clazz, | |
| 154 jstring j_histogram_name, | |
| 155 jint j_histogram_key, | |
| 156 jboolean j_sample) { | |
| 157 bool sample = static_cast<bool>(j_sample); | |
| 158 g_histograms.Get() | |
| 159 .BooleanHistogram(env, j_histogram_name, j_histogram_key) | |
| 160 ->AddBoolean(sample); | |
| 161 } | |
| 162 | |
| 163 void RecordEnumeratedHistogram(JNIEnv* env, | |
| 164 jclass clazz, | |
| 165 jstring j_histogram_name, | |
| 166 jint j_histogram_key, | |
| 167 jint j_sample, | |
| 168 jint j_boundary) { | |
| 169 int sample = static_cast<int>(j_sample); | |
| 170 | |
| 171 g_histograms.Get() | |
| 172 .EnumeratedHistogram(env, j_histogram_name, j_histogram_key, j_boundary) | |
| 173 ->Add(sample); | |
| 174 } | |
| 175 | |
| 176 void RecordCustomCountHistogram(JNIEnv* env, | |
| 177 jclass clazz, | |
| 178 jstring j_histogram_name, | |
| 179 jint j_histogram_key, | |
| 180 jint j_sample, | |
| 181 jint j_min, | |
| 182 jint j_max, | |
| 183 jint j_num_buckets) { | |
| 184 int sample = static_cast<int>(j_sample); | |
| 185 | |
| 186 g_histograms.Get() | |
| 187 .CustomCountHistogram(env, j_histogram_name, j_histogram_key, j_min, | |
| 188 j_max, j_num_buckets) | |
| 189 ->Add(sample); | |
| 190 } | |
| 191 | |
| 192 void RecordSparseHistogram(JNIEnv* env, | |
| 193 jclass clazz, | |
| 194 jstring j_histogram_name, | |
| 195 jint j_histogram_key, | |
| 196 jint j_sample) { | |
| 197 int sample = static_cast<int>(j_sample); | |
| 198 g_histograms.Get() | |
| 199 .SparseHistogram(env, j_histogram_name, j_histogram_key) | |
| 200 ->Add(sample); | |
| 201 } | |
| 202 | |
| 203 void RecordCustomTimesHistogramMilliseconds(JNIEnv* env, | |
| 204 jclass clazz, | |
| 205 jstring j_histogram_name, | |
| 206 jint j_histogram_key, | |
| 207 jlong j_duration, | |
| 208 jlong j_min, | |
| 209 jlong j_max, | |
| 210 jint j_num_buckets) { | |
| 211 g_histograms.Get() | |
| 212 .CustomTimesHistogram(env, j_histogram_name, j_histogram_key, j_min, | |
| 213 j_max, j_num_buckets) | |
| 214 ->AddTime(TimeDelta::FromMilliseconds(static_cast<int64>(j_duration))); | |
| 215 } | |
| 216 | |
| 217 void Initialize(JNIEnv* env, jclass) { | |
| 218 StatisticsRecorder::Initialize(); | |
| 219 } | |
| 220 | |
| 221 // This backs a Java test util for testing histograms - | |
| 222 // MetricsUtils.HistogramDelta. It should live in a test-specific file, but we | |
| 223 // currently can't have test-specific native code packaged in test-specific Java | |
| 224 // targets - see http://crbug.com/415945. | |
| 225 jint GetHistogramValueCountForTesting(JNIEnv* env, | |
| 226 jclass clazz, | |
| 227 jstring histogram_name, | |
| 228 jint sample) { | |
| 229 HistogramBase* histogram = StatisticsRecorder::FindHistogram( | |
| 230 android::ConvertJavaStringToUTF8(env, histogram_name)); | |
| 231 if (histogram == nullptr) { | |
| 232 // No samples have been recorded for this histogram (yet?). | |
| 233 return 0; | |
| 234 } | |
| 235 | |
| 236 scoped_ptr<HistogramSamples> samples = histogram->SnapshotSamples(); | |
| 237 return samples->GetCount(static_cast<int>(sample)); | |
| 238 } | |
| 239 | |
| 240 bool RegisterRecordHistogram(JNIEnv* env) { | |
| 241 return RegisterNativesImpl(env); | |
| 242 } | |
| 243 | |
| 244 } // namespace android | |
| 245 } // namespace base | |
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