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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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126 histogram->SetFlags(HistogramBase::kCallbackExists); | 125 histogram->SetFlags(HistogramBase::kCallbackExists); |
127 else | 126 else |
128 histogram->ClearFlags(HistogramBase::kCallbackExists); | 127 histogram->ClearFlags(HistogramBase::kCallbackExists); |
129 } | 128 } |
130 histogram_to_return = histogram; | 129 histogram_to_return = histogram; |
131 } else if (histogram == it->second) { | 130 } else if (histogram == it->second) { |
132 // The histogram was registered before. | 131 // The histogram was registered before. |
133 histogram_to_return = histogram; | 132 histogram_to_return = histogram; |
134 } else { | 133 } else { |
135 // We already have one histogram with this name. | 134 // We already have one histogram with this name. |
136 CHECK_EQ(histogram->histogram_name(), | 135 DCHECK_EQ(histogram->histogram_name(), |
137 it->second->histogram_name()) << "hash collision"; | 136 it->second->histogram_name()) << "hash collision"; |
138 histogram_to_return = it->second; | 137 histogram_to_return = it->second; |
139 histogram_to_delete = histogram; | 138 histogram_to_delete = histogram; |
140 } | 139 } |
141 base::debug::Alias(&it); | |
142 base::debug::Alias(&name); | |
143 base::debug::Alias(&name_hash); | |
144 } | 140 } |
145 } | 141 } |
146 base::debug::Alias(&histogram); | |
147 delete histogram_to_delete; | 142 delete histogram_to_delete; |
148 return histogram_to_return; | 143 return histogram_to_return; |
149 } | 144 } |
150 | 145 |
151 // static | 146 // static |
152 const BucketRanges* StatisticsRecorder::RegisterOrDeleteDuplicateRanges( | 147 const BucketRanges* StatisticsRecorder::RegisterOrDeleteDuplicateRanges( |
153 const BucketRanges* ranges) { | 148 const BucketRanges* ranges) { |
154 DCHECK(ranges->HasValidChecksum()); | 149 DCHECK(ranges->HasValidChecksum()); |
155 scoped_ptr<const BucketRanges> ranges_deleter; | 150 scoped_ptr<const BucketRanges> ranges_deleter; |
156 | 151 |
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286 } | 281 } |
287 | 282 |
288 // static | 283 // static |
289 HistogramBase* StatisticsRecorder::FindHistogram(base::StringPiece name) { | 284 HistogramBase* StatisticsRecorder::FindHistogram(base::StringPiece name) { |
290 if (lock_ == NULL) | 285 if (lock_ == NULL) |
291 return NULL; | 286 return NULL; |
292 base::AutoLock auto_lock(*lock_); | 287 base::AutoLock auto_lock(*lock_); |
293 if (histograms_ == NULL) | 288 if (histograms_ == NULL) |
294 return NULL; | 289 return NULL; |
295 | 290 |
296 const uint64_t lookup_hash = HashMetricName(name); | 291 HistogramMap::iterator it = histograms_->find(HashMetricName(name)); |
297 HistogramMap::iterator it = histograms_->find(lookup_hash); | |
298 if (histograms_->end() == it) | 292 if (histograms_->end() == it) |
299 return NULL; | 293 return NULL; |
300 | 294 DCHECK_EQ(name, it->second->histogram_name()) << "hash collision"; |
301 const uint64_t existing_hash = it->first; | |
302 const char* existing_name = it->second->histogram_name().c_str(); | |
303 HistogramMap* histograms = histograms_; | |
304 CHECK_EQ(name, it->second->histogram_name()) << "hash collision"; | |
305 base::debug::Alias(&lookup_hash); | |
306 base::debug::Alias(&existing_hash); | |
307 base::debug::Alias(&name); | |
308 base::debug::Alias(&existing_name); | |
309 base::debug::Alias(&it); | |
310 base::debug::Alias(&histograms); | |
311 | |
312 return it->second; | 295 return it->second; |
313 } | 296 } |
314 | 297 |
315 // static | 298 // static |
316 StatisticsRecorder::HistogramIterator StatisticsRecorder::begin( | 299 StatisticsRecorder::HistogramIterator StatisticsRecorder::begin( |
317 bool include_persistent) { | 300 bool include_persistent) { |
318 return HistogramIterator(histograms_->begin(), include_persistent); | 301 return HistogramIterator(histograms_->begin(), include_persistent); |
319 } | 302 } |
320 | 303 |
321 // static | 304 // static |
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474 // static | 457 // static |
475 StatisticsRecorder::HistogramMap* StatisticsRecorder::histograms_ = NULL; | 458 StatisticsRecorder::HistogramMap* StatisticsRecorder::histograms_ = NULL; |
476 // static | 459 // static |
477 StatisticsRecorder::CallbackMap* StatisticsRecorder::callbacks_ = NULL; | 460 StatisticsRecorder::CallbackMap* StatisticsRecorder::callbacks_ = NULL; |
478 // static | 461 // static |
479 StatisticsRecorder::RangesMap* StatisticsRecorder::ranges_ = NULL; | 462 StatisticsRecorder::RangesMap* StatisticsRecorder::ranges_ = NULL; |
480 // static | 463 // static |
481 base::Lock* StatisticsRecorder::lock_ = NULL; | 464 base::Lock* StatisticsRecorder::lock_ = NULL; |
482 | 465 |
483 } // namespace base | 466 } // namespace base |
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