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| 1 // Copyright 2015 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 #ifndef BASE_TRACE_EVENT_TRACE_EVENT_MEMORY_OVERHEAD_H_ | |
| 6 #define BASE_TRACE_EVENT_TRACE_EVENT_MEMORY_OVERHEAD_H_ | |
| 7 | |
| 8 #include "base/base_export.h" | |
| 9 #include "base/containers/hash_tables.h" | |
| 10 #include "base/containers/small_map.h" | |
| 11 | |
| 12 namespace base { | |
| 13 | |
| 14 class RefCountedString; | |
| 15 class Value; | |
| 16 | |
| 17 namespace trace_event { | |
| 18 | |
| 19 class ProcessMemoryDump; | |
| 20 | |
| 21 // Used to estimate the memory overhead of the tracing infrastructure. | |
| 22 class BASE_EXPORT TraceEventMemoryOverhead { | |
| 23 public: | |
| 24 TraceEventMemoryOverhead(); | |
| 25 ~TraceEventMemoryOverhead(); | |
| 26 | |
| 27 // Use this method to account the overhead of an object for which an estimate | |
| 28 // is known for both the allocated and resident memory. | |
| 29 void Add(const char* object_type, | |
| 30 size_t allocated_size_in_bytes, | |
| 31 size_t resident_size_in_bytes); | |
| 32 | |
| 33 // Similar to Add() above, but assumes that | |
| 34 // |resident_size_in_bytes| == |allocated_size_in_bytes|. | |
| 35 void Add(const char* object_type, size_t allocated_size_in_bytes); | |
| 36 | |
| 37 // Specialized profiling functions for commonly used object types. | |
| 38 void AddString(const std::string& str); | |
| 39 void AddValue(const Value& value); | |
| 40 void AddRefCountedString(const RefCountedString& str); | |
| 41 | |
| 42 // Call this after all the Add* methods above to account the memory used by | |
| 43 // this TraceEventMemoryOverhead instance itself. | |
| 44 void AddSelf(); | |
| 45 | |
| 46 // Adds up and merges all the values from |other| to this instance. | |
| 47 void Update(const TraceEventMemoryOverhead& other); | |
| 48 | |
| 49 void DumpInto(const char* base_name, ProcessMemoryDump* pmd) const; | |
| 50 | |
| 51 private: | |
| 52 struct ObjectCountAndSize { | |
| 53 size_t count; | |
| 54 size_t allocated_size_in_bytes; | |
| 55 size_t resident_size_in_bytes; | |
| 56 }; | |
| 57 using map_type = SmallMap<hash_map<const char*, ObjectCountAndSize>, 16>; | |
| 58 map_type allocated_objects_; | |
| 59 | |
| 60 void AddOrCreateInternal(const char* object_type, | |
| 61 size_t count, | |
| 62 size_t allocated_size_in_bytes, | |
| 63 size_t resident_size_in_bytes); | |
| 64 | |
| 65 DISALLOW_COPY_AND_ASSIGN(TraceEventMemoryOverhead); | |
| 66 }; | |
| 67 | |
| 68 } // namespace trace_event | |
| 69 } // namespace base | |
| 70 | |
| 71 #endif // BASE_TRACE_EVENT_TRACE_EVENT_MEMORY_OVERHEAD_H_ | |
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