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 BASE_EXPORT VMRegion {
  23     static const uint32 kProtectionFlagsRead;
  24     static const uint32 kProtectionFlagsWrite;
  25     static const uint32 kProtectionFlagsExec;
  26
  27     VMRegion();
  28
  29     uint64 start_address;
  30     uint64 size_in_bytes;
  31     uint32 protection_flags;
  32     std::string mapped_file;
  33
  34     // private_dirty_resident + private_clean_resident + shared_dirty_resident +
  35     // shared_clean_resident = resident set size.
  36     uint64 byte_stats_private_dirty_resident;
  37     uint64 byte_stats_private_clean_resident;
  38     uint64 byte_stats_shared_dirty_resident;
  39     uint64 byte_stats_shared_clean_resident;
  40
  41     uint64 byte_stats_swapped;
  42
  43     // For multiprocess accounting.
  44     uint64 byte_stats_proportional_resident;
  45   };
  46
  47   ProcessMemoryMaps();
  48   ~ProcessMemoryMaps();
  49
  50   void AddVMRegion(const VMRegion& region) { vm_regions_.push_back(region); }
  51   const std::vector<VMRegion>& vm_regions() const { return vm_regions_; }
  52
  53   // Called at trace generation time to populate the TracedValue.
  54   void AsValueInto(TracedValue* value) const;
  55
  56   // Clears up all the VMRegion(s) stored.
  57   void Clear();
  58
  59  private:
  60   std::vector<VMRegion> vm_regions_;
  61
  62   DISALLOW_COPY_AND_ASSIGN(ProcessMemoryMaps);
  63 };
  64
  65 }  // namespace trace_event
  66 }  // namespace base
  67
  68 #endif  // BASE_TRACE_EVENT_PROCESS_MEMORY_MAPS_H_