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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "base/metrics/statistics_recorder.h" | 5 #include "base/metrics/statistics_recorder.h" |
6 | 6 |
7 #include "base/at_exit.h" | 7 #include "base/at_exit.h" |
8 #include "base/debug/alias.h" | |
9 #include "base/debug/leak_annotations.h" | 8 #include "base/debug/leak_annotations.h" |
10 #include "base/json/string_escape.h" | 9 #include "base/json/string_escape.h" |
11 #include "base/logging.h" | 10 #include "base/logging.h" |
12 #include "base/memory/scoped_ptr.h" | 11 #include "base/memory/scoped_ptr.h" |
13 #include "base/metrics/histogram.h" | 12 #include "base/metrics/histogram.h" |
14 #include "base/metrics/metrics_hashes.h" | 13 #include "base/metrics/metrics_hashes.h" |
15 #include "base/stl_util.h" | 14 #include "base/stl_util.h" |
16 #include "base/strings/stringprintf.h" | 15 #include "base/strings/stringprintf.h" |
17 #include "base/synchronization/lock.h" | 16 #include "base/synchronization/lock.h" |
18 #include "base/values.h" | 17 #include "base/values.h" |
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117 histogram->SetFlags(HistogramBase::kCallbackExists); | 116 histogram->SetFlags(HistogramBase::kCallbackExists); |
118 else | 117 else |
119 histogram->ClearFlags(HistogramBase::kCallbackExists); | 118 histogram->ClearFlags(HistogramBase::kCallbackExists); |
120 } | 119 } |
121 histogram_to_return = histogram; | 120 histogram_to_return = histogram; |
122 } else if (histogram == it->second) { | 121 } else if (histogram == it->second) { |
123 // The histogram was registered before. | 122 // The histogram was registered before. |
124 histogram_to_return = histogram; | 123 histogram_to_return = histogram; |
125 } else { | 124 } else { |
126 // We already have one histogram with this name. | 125 // We already have one histogram with this name. |
127 CHECK_EQ(histogram->histogram_name(), | 126 DCHECK_EQ(histogram->histogram_name(), |
128 it->second->histogram_name()) << "hash collision"; | 127 it->second->histogram_name()) << "hash collision"; |
129 histogram_to_return = it->second; | 128 histogram_to_return = it->second; |
130 histogram_to_delete = histogram; | 129 histogram_to_delete = histogram; |
131 } | 130 } |
132 base::debug::Alias(&it); | |
133 base::debug::Alias(&name); | |
134 base::debug::Alias(&name_hash); | |
135 } | 131 } |
136 } | 132 } |
137 base::debug::Alias(&histogram); | |
138 delete histogram_to_delete; | 133 delete histogram_to_delete; |
139 return histogram_to_return; | 134 return histogram_to_return; |
140 } | 135 } |
141 | 136 |
142 // static | 137 // static |
143 const BucketRanges* StatisticsRecorder::RegisterOrDeleteDuplicateRanges( | 138 const BucketRanges* StatisticsRecorder::RegisterOrDeleteDuplicateRanges( |
144 const BucketRanges* ranges) { | 139 const BucketRanges* ranges) { |
145 DCHECK(ranges->HasValidChecksum()); | 140 DCHECK(ranges->HasValidChecksum()); |
146 scoped_ptr<const BucketRanges> ranges_deleter; | 141 scoped_ptr<const BucketRanges> ranges_deleter; |
147 | 142 |
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277 } | 272 } |
278 | 273 |
279 // static | 274 // static |
280 HistogramBase* StatisticsRecorder::FindHistogram(base::StringPiece name) { | 275 HistogramBase* StatisticsRecorder::FindHistogram(base::StringPiece name) { |
281 if (lock_ == NULL) | 276 if (lock_ == NULL) |
282 return NULL; | 277 return NULL; |
283 base::AutoLock auto_lock(*lock_); | 278 base::AutoLock auto_lock(*lock_); |
284 if (histograms_ == NULL) | 279 if (histograms_ == NULL) |
285 return NULL; | 280 return NULL; |
286 | 281 |
287 const uint64_t lookup_hash = HashMetricName(name); | 282 HistogramMap::iterator it = histograms_->find(HashMetricName(name)); |
288 HistogramMap::iterator it = histograms_->find(lookup_hash); | |
289 if (histograms_->end() == it) | 283 if (histograms_->end() == it) |
290 return NULL; | 284 return NULL; |
291 | 285 DCHECK_EQ(name, it->second->histogram_name()) << "hash collision"; |
292 const uint64_t existing_hash = it->first; | |
293 const char* existing_name = it->second->histogram_name().c_str(); | |
294 HistogramMap* histograms = histograms_; | |
295 CHECK_EQ(name, it->second->histogram_name()) << "hash collision"; | |
296 base::debug::Alias(&lookup_hash); | |
297 base::debug::Alias(&existing_hash); | |
298 base::debug::Alias(&name); | |
299 base::debug::Alias(&existing_name); | |
300 base::debug::Alias(&it); | |
301 base::debug::Alias(&histograms); | |
302 | |
303 return it->second; | 286 return it->second; |
304 } | 287 } |
305 | 288 |
306 // static | 289 // static |
307 StatisticsRecorder::HistogramIterator StatisticsRecorder::begin( | 290 StatisticsRecorder::HistogramIterator StatisticsRecorder::begin( |
308 bool include_persistent) { | 291 bool include_persistent) { |
309 return HistogramIterator(histograms_->begin(), include_persistent); | 292 return HistogramIterator(histograms_->begin(), include_persistent); |
310 } | 293 } |
311 | 294 |
312 // static | 295 // static |
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461 // static | 444 // static |
462 StatisticsRecorder::HistogramMap* StatisticsRecorder::histograms_ = NULL; | 445 StatisticsRecorder::HistogramMap* StatisticsRecorder::histograms_ = NULL; |
463 // static | 446 // static |
464 StatisticsRecorder::CallbackMap* StatisticsRecorder::callbacks_ = NULL; | 447 StatisticsRecorder::CallbackMap* StatisticsRecorder::callbacks_ = NULL; |
465 // static | 448 // static |
466 StatisticsRecorder::RangesMap* StatisticsRecorder::ranges_ = NULL; | 449 StatisticsRecorder::RangesMap* StatisticsRecorder::ranges_ = NULL; |
467 // static | 450 // static |
468 base::Lock* StatisticsRecorder::lock_ = NULL; | 451 base::Lock* StatisticsRecorder::lock_ = NULL; |
469 | 452 |
470 } // namespace base | 453 } // namespace base |
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