v8::HeapGraphEdge Class Reference

HeapSnapshotEdge represents a directed connection between heap graph nodes: from retainers to retained nodes. More...

#include <v8-profiler.h>

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Public Types
enum	Type {   kContextVariable = 0 , kElement = 1 , kProperty = 2 , kInternal = 3 ,   kHidden = 4 , kShortcut = 5 , kWeak = 6 }

Public Member Functions
Type	GetType () const
	Returns edge type (see HeapGraphEdge::Type). More...
Handle< Value >	GetName () const
	Returns edge name. More...
const HeapGraphNode *	GetFromNode () const
	Returns origin node. More...
const HeapGraphNode *	GetToNode () const
	Returns destination node. More...

Detailed Description

HeapSnapshotEdge represents a directed connection between heap graph nodes: from retainers to retained nodes.

Definition at line 183 of file v8-profiler.h.

Member Enumeration Documentation

Type

enum v8::HeapGraphEdge::Type

Enumerator
kContextVariable
kElement
kProperty
kInternal
kHidden
kShortcut
kWeak

Definition at line 185 of file v8-profiler.h.

            {
    kContextVariable = 0,  // A variable from a function context.
    kElement = 1,          // An element of an array.
    kProperty = 2,         // A named object property.
    kInternal = 3,         // A link that can't be accessed from JS,
                           // thus, its name isn't a real property name
                           // (e.g. parts of a ConsString).
    kHidden = 4,           // A link that is needed for proper sizes
                           // calculation, but may be hidden from user.
    kShortcut = 5,         // A link that must not be followed during
                           // sizes calculation.
    kWeak = 6              // A weak reference (ignored by the GC).
  };

Member Function Documentation

GetFromNode()

const HeapGraphNode * v8::HeapGraphEdge::GetFromNode

(

)

const

Returns origin node.

Definition at line 7245 of file api.cc.

                                                      {
  const i::HeapEntry* from = ToInternal(this)->from();
  return reinterpret_cast<const HeapGraphNode*>(from);
}

References v8::ToInternal().

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GetName()

Handle< Value > v8::HeapGraphEdge::GetName

(

)

const

Returns edge name.

This can be a variable name, an element index, or a property name.

Definition at line 7224 of file api.cc.

                                           {
  i::Isolate* isolate = i::Isolate::Current();
  i::HeapGraphEdge* edge = ToInternal(this);
  switch (edge->type()) {
    case i::HeapGraphEdge::kContextVariable:
    case i::HeapGraphEdge::kInternal:
    case i::HeapGraphEdge::kProperty:
    case i::HeapGraphEdge::kShortcut:
    case i::HeapGraphEdge::kWeak:
      return ToApiHandle<String>(
          isolate->factory()->InternalizeUtf8String(edge->name()));
    case i::HeapGraphEdge::kElement:
    case i::HeapGraphEdge::kHidden:
      return ToApiHandle<Number>(
          isolate->factory()->NewNumberFromInt(edge->index()));
    default: UNREACHABLE();
  }
  return v8::Undefined(reinterpret_cast<v8::Isolate*>(isolate));
}

References v8::internal::Isolate::factory(), v8::kWeak, v8::ToInternal(), v8::Undefined(), and UNREACHABLE.

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GetToNode()

const HeapGraphNode * v8::HeapGraphEdge::GetToNode

(

)

const

Returns destination node.

Definition at line 7251 of file api.cc.

                                                    {
  const i::HeapEntry* to = ToInternal(this)->to();
  return reinterpret_cast<const HeapGraphNode*>(to);
}

References to(), and v8::ToInternal().

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GetType()

HeapGraphEdge::Type v8::HeapGraphEdge::GetType

(

)

const

Returns edge type (see HeapGraphEdge::Type).

Definition at line 7219 of file api.cc.

                                               {
  return static_cast<HeapGraphEdge::Type>(ToInternal(this)->type());
}

References v8::ToInternal().

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The documentation for this class was generated from the following files:

• /mnt/V8SourceCode/include/v8-profiler.h
• /mnt/V8SourceCode/src/api.cc