Connect SparseHistogram with the rest of stats system

base/metrics/histogram.cc

 // Copyright (c) 2012 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.
 
 // Histogram is an object that aggregates statistics, and can summarize them in
 // various forms, including ASCII graphical, HTML, and numerically (as a
 // vector of numbers corresponding to each of the aggregating buckets).
 // See header file for details and examples.
 
 #include "base/metrics/histogram.h"
@@ skipping 66 matching lines @@
 }
 
 }  // namespace
 
 typedef HistogramBase::Count Count;
 typedef HistogramBase::Sample Sample;
 
 // static
 const size_t Histogram::kBucketCount_MAX = 16384u;
 
-// TODO(rtenneti): delete this code after debugging.
-void CheckCorruption(const Histogram& histogram, bool new_histogram) {
-  const std::string& histogram_name = histogram.histogram_name();
-  char histogram_name_buf[128];
-  base::strlcpy(histogram_name_buf,
-                histogram_name.c_str(),
-                arraysize(histogram_name_buf));
-  base::debug::Alias(histogram_name_buf);
-
-  bool debug_new_histogram[1];
-  debug_new_histogram[0] = new_histogram;
-  base::debug::Alias(debug_new_histogram);
-
-  Sample previous_range = -1;  // Bottom range is always 0.
-  for (size_t index = 0; index < histogram.bucket_count(); ++index) {
-    int new_range = histogram.ranges(index);
-    CHECK_LT(previous_range, new_range);
-    previous_range = new_range;
-  }
-
-  CHECK(histogram.bucket_ranges()->HasValidChecksum());
-}
-
 HistogramBase* Histogram::FactoryGet(const string& name,
                                      Sample minimum,
                                      Sample maximum,
                                      size_t bucket_count,
                                      int32 flags) {
   bool valid_arguments =
       InspectConstructionArguments(name, &minimum, &maximum, &bucket_count);
   DCHECK(valid_arguments);
 
-  Histogram* histogram = StatisticsRecorder::FindHistogram(name);
+  HistogramBase* histogram = StatisticsRecorder::FindHistogram(name);
   if (!histogram) {
     // To avoid racy destruction at shutdown, the following will be leaked.
     BucketRanges* ranges = new BucketRanges(bucket_count + 1);
     InitializeBucketRanges(minimum, maximum, bucket_count, ranges);
     const BucketRanges* registered_ranges =
         StatisticsRecorder::RegisterOrDeleteDuplicateRanges(ranges);
 
     Histogram* tentative_histogram =
         new Histogram(name, minimum, maximum, bucket_count, registered_ranges);
-    CheckCorruption(*tentative_histogram, true);
 
     tentative_histogram->SetFlags(flags);
     histogram =
         StatisticsRecorder::RegisterOrDeleteDuplicate(tentative_histogram);
   }
-  // TODO(rtenneti): delete this code after debugging.
-  CheckCorruption(*histogram, false);
 
-  CHECK_EQ(HISTOGRAM, histogram->GetHistogramType());
+  DCHECK_EQ(HISTOGRAM, histogram->GetHistogramType());
   CHECK(histogram->HasConstructionArguments(minimum, maximum, bucket_count));
   return histogram;
 }
 
 HistogramBase* Histogram::FactoryTimeGet(const string& name,
                                          TimeDelta minimum,
                                          TimeDelta maximum,
                                          size_t bucket_count,
                                          int32 flags) {
   return FactoryGet(name, minimum.InMilliseconds(), maximum.InMilliseconds(),
@@ skipping 44 matching lines @@
       ++current;  // Just do a narrow bucket, and keep trying.
     ranges->set_range(bucket_index, current);
   }
   ranges->set_range(ranges->size() - 1, HistogramBase::kSampleType_MAX);
   ranges->ResetChecksum();
 }
 
 // static
 const int Histogram::kCommonRaceBasedCountMismatch = 5;
 
-Histogram::Inconsistencies Histogram::FindCorruption(
-    const HistogramSamples& samples) const {
+int Histogram::FindCorruption(const HistogramSamples& samples) const {
   int inconsistencies = NO_INCONSISTENCIES;
   Sample previous_range = -1;  // Bottom range is always 0.
   for (size_t index = 0; index < bucket_count(); ++index) {
     int new_range = ranges(index);
     if (previous_range >= new_range)
       inconsistencies |= BUCKET_ORDER_ERROR;
     previous_range = new_range;
   }
 
   if (!bucket_ranges()->HasValidChecksum())
     inconsistencies |= RANGE_CHECKSUM_ERROR;
 
   int64 delta64 = samples.redundant_count() - samples.TotalCount();
   if (delta64 != 0) {
     int delta = static_cast<int>(delta64);
     if (delta != delta64)
       delta = INT_MAX;  // Flag all giant errors as INT_MAX.
     if (delta > 0) {
       UMA_HISTOGRAM_COUNTS("Histogram.InconsistentCountHigh", delta);
       if (delta > kCommonRaceBasedCountMismatch)
         inconsistencies |= COUNT_HIGH_ERROR;
     } else {
       DCHECK_GT(0, delta);
       UMA_HISTOGRAM_COUNTS("Histogram.InconsistentCountLow", -delta);
       if (-delta > kCommonRaceBasedCountMismatch)
         inconsistencies |= COUNT_LOW_ERROR;
     }
   }
-  return static_cast<Inconsistencies>(inconsistencies);
+  return inconsistencies;
 }
 
 Sample Histogram::ranges(size_t i) const {
   return bucket_ranges_->range(i);
 }
 
 size_t Histogram::bucket_count() const {
   return bucket_count_;
 }
 
@@ skipping 348 matching lines @@
       const std::string& name,
       Sample minimum,
       Sample maximum,
       size_t bucket_count,
       int32 flags,
       const DescriptionPair descriptions[]) {
   bool valid_arguments = Histogram::InspectConstructionArguments(
       name, &minimum, &maximum, &bucket_count);
   DCHECK(valid_arguments);
 
-  Histogram* histogram = StatisticsRecorder::FindHistogram(name);
+  HistogramBase* histogram = StatisticsRecorder::FindHistogram(name);
   if (!histogram) {
     // To avoid racy destruction at shutdown, the following will be leaked.
     BucketRanges* ranges = new BucketRanges(bucket_count + 1);
     InitializeBucketRanges(minimum, maximum, bucket_count, ranges);
     const BucketRanges* registered_ranges =
         StatisticsRecorder::RegisterOrDeleteDuplicateRanges(ranges);
 
     LinearHistogram* tentative_histogram =
         new LinearHistogram(name, minimum, maximum, bucket_count,
                             registered_ranges);
-    CheckCorruption(*tentative_histogram, true);
 
     // Set range descriptions.
     if (descriptions) {
       for (int i = 0; descriptions[i].description; ++i) {
         tentative_histogram->bucket_description_[descriptions[i].sample] =
             descriptions[i].description;
       }
     }
 
     tentative_histogram->SetFlags(flags);
     histogram =
         StatisticsRecorder::RegisterOrDeleteDuplicate(tentative_histogram);
   }
-  // TODO(rtenneti): delete this code after debugging.
-  CheckCorruption(*histogram, false);
 
-  CHECK_EQ(LINEAR_HISTOGRAM, histogram->GetHistogramType());
+  DCHECK_EQ(LINEAR_HISTOGRAM, histogram->GetHistogramType());
   CHECK(histogram->HasConstructionArguments(minimum, maximum, bucket_count));
   return histogram;
 }
 
 HistogramType LinearHistogram::GetHistogramType() const {
   return LINEAR_HISTOGRAM;
 }
 
 LinearHistogram::LinearHistogram(const string& name,
                                  Sample minimum,
@@ skipping 62 matching lines @@
     return NULL;
   }
   return histogram;
 }
 
 //------------------------------------------------------------------------------
 // This section provides implementation for BooleanHistogram.
 //------------------------------------------------------------------------------
 
 HistogramBase* BooleanHistogram::FactoryGet(const string& name, int32 flags) {
-  Histogram* histogram = StatisticsRecorder::FindHistogram(name);
+  HistogramBase* histogram = StatisticsRecorder::FindHistogram(name);
   if (!histogram) {
     // To avoid racy destruction at shutdown, the following will be leaked.
     BucketRanges* ranges = new BucketRanges(4);
     LinearHistogram::InitializeBucketRanges(1, 2, 3, ranges);
     const BucketRanges* registered_ranges =
         StatisticsRecorder::RegisterOrDeleteDuplicateRanges(ranges);
 
     BooleanHistogram* tentative_histogram =
         new BooleanHistogram(name, registered_ranges);
-    CheckCorruption(*tentative_histogram, true);
 
     tentative_histogram->SetFlags(flags);
     histogram =
         StatisticsRecorder::RegisterOrDeleteDuplicate(tentative_histogram);
   }
-  // TODO(rtenneti): delete this code after debugging.
-  CheckCorruption(*histogram, false);
 
-  CHECK_EQ(BOOLEAN_HISTOGRAM, histogram->GetHistogramType());
+  DCHECK_EQ(BOOLEAN_HISTOGRAM, histogram->GetHistogramType());
   return histogram;
 }
 
 HistogramType BooleanHistogram::GetHistogramType() const {
   return BOOLEAN_HISTOGRAM;
 }
 
 BooleanHistogram::BooleanHistogram(const string& name,
                                    const BucketRanges* ranges)
     : LinearHistogram(name, 1, 2, 3, ranges) {}
@@ skipping 22 matching lines @@
 
 //------------------------------------------------------------------------------
 // CustomHistogram:
 //------------------------------------------------------------------------------
 
 HistogramBase* CustomHistogram::FactoryGet(const string& name,
                                            const vector<Sample>& custom_ranges,
                                            int32 flags) {
   CHECK(ValidateCustomRanges(custom_ranges));
 
-  Histogram* histogram = StatisticsRecorder::FindHistogram(name);
+  HistogramBase* histogram = StatisticsRecorder::FindHistogram(name);
   if (!histogram) {
     BucketRanges* ranges = CreateBucketRangesFromCustomRanges(custom_ranges);
     const BucketRanges* registered_ranges =
         StatisticsRecorder::RegisterOrDeleteDuplicateRanges(ranges);
 
     // To avoid racy destruction at shutdown, the following will be leaked.
     CustomHistogram* tentative_histogram =
         new CustomHistogram(name, registered_ranges);
-    CheckCorruption(*tentative_histogram, true);
 
     tentative_histogram->SetFlags(flags);
 
     histogram =
         StatisticsRecorder::RegisterOrDeleteDuplicate(tentative_histogram);
   }
-  // TODO(rtenneti): delete this code after debugging.
-  CheckCorruption(*histogram, false);
 
-  CHECK_EQ(histogram->GetHistogramType(), CUSTOM_HISTOGRAM);
+  DCHECK_EQ(histogram->GetHistogramType(), CUSTOM_HISTOGRAM);
   return histogram;
 }
 
 HistogramType CustomHistogram::GetHistogramType() const {
   return CUSTOM_HISTOGRAM;
 }
 
 // static
 vector<Sample> CustomHistogram::ArrayToCustomRanges(
     const Sample* values, size_t num_values) {
@@ skipping 91 matching lines @@
 
   BucketRanges* bucket_ranges = new BucketRanges(ranges.size());
   for (size_t i = 0; i < ranges.size(); i++) {
     bucket_ranges->set_range(i, ranges[i]);
   }
   bucket_ranges->ResetChecksum();
   return bucket_ranges;
 }
 
 }  // namespace base