src/v8/src/heap-snapshot-generator-inl.h

   1 // Copyright 2013 the V8 project 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 V8_HEAP_SNAPSHOT_GENERATOR_INL_H_
   6 #define V8_HEAP_SNAPSHOT_GENERATOR_INL_H_
   7
   8 #include "heap-snapshot-generator.h"
   9
  10 namespace v8 {
  11 namespace internal {
  12
  13
  14 HeapEntry* HeapGraphEdge::from() const {
  15   return &snapshot()->entries()[from_index_];
  16 }
  17
  18
  19 HeapSnapshot* HeapGraphEdge::snapshot() const {
  20   return to_entry_->snapshot();
  21 }
  22
  23
  24 int HeapEntry::index() const {
  25   return static_cast<int>(this - &snapshot_->entries().first());
  26 }
  27
  28
  29 int HeapEntry::set_children_index(int index) {
  30   children_index_ = index;
  31   int next_index = index + children_count_;
  32   children_count_ = 0;
  33   return next_index;
  34 }
  35
  36
  37 HeapGraphEdge** HeapEntry::children_arr() {
  38   ASSERT(children_index_ >= 0);
  39   SLOW_ASSERT(children_index_ < snapshot_->children().length() ||
  40       (children_index_ == snapshot_->children().length() &&
  41        children_count_ == 0));
  42   return &snapshot_->children().first() + children_index_;
  43 }
  44
  45
  46 SnapshotObjectId HeapObjectsMap::GetNthGcSubrootId(int delta) {
  47   return kGcRootsFirstSubrootId + delta * kObjectIdStep;
  48 }
  49
  50
  51 HeapObject* V8HeapExplorer::GetNthGcSubrootObject(int delta) {
  52   return reinterpret_cast<HeapObject*>(
  53       reinterpret_cast<char*>(kFirstGcSubrootObject) +
  54       delta * HeapObjectsMap::kObjectIdStep);
  55 }
  56
  57
  58 int V8HeapExplorer::GetGcSubrootOrder(HeapObject* subroot) {
  59   return static_cast<int>(
  60       (reinterpret_cast<char*>(subroot) -
  61        reinterpret_cast<char*>(kFirstGcSubrootObject)) /
  62       HeapObjectsMap::kObjectIdStep);
  63 }
  64
  65 } }  // namespace v8::internal
  66
  67 #endif  // V8_HEAP_SNAPSHOT_GENERATOR_INL_H_