base/trace_event/process_memory_maps.h

   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_PROCESS_MEMORY_MAPS_H_
   6 #define BASE_TRACE_EVENT_PROCESS_MEMORY_MAPS_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/base_export.h"
  12 #include "base/basictypes.h"
  13
  14 namespace base {
  15 namespace trace_event {
  16
  17 class TracedValue;
  18
  19 // Data model for process-wide memory stats.
  20 class BASE_EXPORT ProcessMemoryMaps {
  21  public:
  22   struct VMRegion {
  23     static const uint32 kProtectionFlagsRead;
  24     static const uint32 kProtectionFlagsWrite;
  25     static const uint32 kProtectionFlagsExec;
  26
  27     uint64 start_address;
  28     uint64 size_in_bytes;
  29     uint32 protection_flags;
  30     std::string mapped_file;
  31
  32     // private_resident + shared_resident = resident set size.
  33     uint64 byte_stats_private_resident;
  34     uint64 byte_stats_shared_resident;
  35
  36     // For multiprocess accounting.
  37     uint64 byte_stats_proportional_resident;
  38   };
  39
  40   ProcessMemoryMaps();
  41   ~ProcessMemoryMaps();
  42
  43   void AddVMRegion(const VMRegion& region) { vm_regions_.push_back(region); }
  44   const std::vector<VMRegion>& vm_regions() const { return vm_regions_; }
  45
  46   // Called at trace generation time to populate the TracedValue.
  47   void AsValueInto(TracedValue* value) const;
  48
  49  private:
  50   std::vector<VMRegion> vm_regions_;
  51
  52   DISALLOW_COPY_AND_ASSIGN(ProcessMemoryMaps);
  53 };
  54
  55 }  // namespace trace_event
  56 }  // namespace base
  57
  58 #endif  // BASE_TRACE_EVENT_PROCESS_MEMORY_MAPS_H_