base/trace_event/process_memory_maps.cc

   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 #include "base/trace_event/process_memory_maps.h"
   6
   7 #include "base/format_macros.h"
   8 #include "base/strings/stringprintf.h"
   9 #include "base/trace_event/trace_event_argument.h"
  10
  11 namespace base {
  12 namespace trace_event {
  13
  14 // static
  15 const uint32 ProcessMemoryMaps::VMRegion::kProtectionFlagsRead = 4;
  16 const uint32 ProcessMemoryMaps::VMRegion::kProtectionFlagsWrite = 2;
  17 const uint32 ProcessMemoryMaps::VMRegion::kProtectionFlagsExec = 1;
  18
  19 ProcessMemoryMaps::VMRegion::VMRegion()
  20     : start_address(0),
  21       size_in_bytes(0),
  22       protection_flags(0),
  23       byte_stats_private_dirty_resident(0),
  24       byte_stats_private_clean_resident(0),
  25       byte_stats_shared_dirty_resident(0),
  26       byte_stats_shared_clean_resident(0),
  27       byte_stats_swapped(0),
  28       byte_stats_proportional_resident(0) {
  29 }
  30
  31 ProcessMemoryMaps::ProcessMemoryMaps() {
  32 }
  33
  34 ProcessMemoryMaps::~ProcessMemoryMaps() {
  35 }
  36
  37 void ProcessMemoryMaps::AsValueInto(TracedValue* value) const {
  38   static const char kHexFmt[] = "%" PRIx64;
  39
  40   // Refer to the design doc goo.gl/sxfFY8 for the semantic of these fields.
  41   value->BeginArray("vm_regions");
  42   for (const auto& region : vm_regions_) {
  43     value->BeginDictionary();
  44
  45     value->SetString("sa", StringPrintf(kHexFmt, region.start_address));
  46     value->SetString("sz", StringPrintf(kHexFmt, region.size_in_bytes));
  47     value->SetInteger("pf", region.protection_flags);
  48     value->SetString("mf", region.mapped_file);
  49
  50     value->BeginDictionary("bs");  // byte stats
  51     value->SetString(
  52         "pss", StringPrintf(kHexFmt, region.byte_stats_proportional_resident));
  53     value->SetString(
  54         "pd", StringPrintf(kHexFmt, region.byte_stats_private_dirty_resident));
  55     value->SetString(
  56         "pc", StringPrintf(kHexFmt, region.byte_stats_private_clean_resident));
  57     value->SetString(
  58         "sd", StringPrintf(kHexFmt, region.byte_stats_shared_dirty_resident));
  59     value->SetString(
  60         "sc", StringPrintf(kHexFmt, region.byte_stats_shared_clean_resident));
  61     value->SetString("sw", StringPrintf(kHexFmt, region.byte_stats_swapped));
  62     value->EndDictionary();
  63
  64     value->EndDictionary();
  65   }
  66   value->EndArray();
  67 }
  68
  69 void ProcessMemoryMaps::Clear() {
  70   vm_regions_.clear();
  71 }
  72
  73 }  // namespace trace_event
  74 }  // namespace base