HeapSnapshot Class Reference

#include <v8-profiler.h>

Public Types
enum	Type { kFull = 0 }
enum	SerializationFormat { kJSON = 0 }

Public Member Functions
Type	GetType () const
unsigned	GetUid () const
Handle< String >	GetTitle () const
const HeapGraphNode *	GetRoot () const
const HeapGraphNode *	GetNodeById (SnapshotObjectId id) const
int	GetNodesCount () const
const HeapGraphNode *	GetNode (int index) const
SnapshotObjectId	GetMaxSnapshotJSObjectId () const
void	Delete ()
void	Serialize (OutputStream *stream, SerializationFormat format) const

Detailed Description

HeapSnapshots record the state of the JS heap at some moment.

Definition at line 301 of file v8-profiler.h.

Member Enumeration Documentation

enum SerializationFormat

Enumerator
kJSON

Definition at line 306 of file v8-profiler.h.

enum Type

Enumerator
kFull

Definition at line 303 of file v8-profiler.h.

Member Function Documentation

void Delete

(

)

Deletes the snapshot and removes it from HeapProfiler's list. All pointers to nodes, edges and paths previously returned become invalid.

Definition at line 6250 of file api.cc.

References HeapProfiler::DeleteAllSnapshots(), and HeapProfiler::GetSnapshotsCount().

SnapshotObjectId GetMaxSnapshotJSObjectId

(

)

const

Returns a max seen JS object Id.

Definition at line 6314 of file api.cc.

Referenced by TEST().

const HeapGraphNode * GetNode

(

int

index

)

const

Returns a node by index.

Definition at line 6306 of file api.cc.

Referenced by TEST().

const HeapGraphNode * GetNodeById

(

SnapshotObjectId

id

)

const

Returns a node by its id.

Definition at line 6291 of file api.cc.

Referenced by TEST().

int GetNodesCount

(

)

const

Returns total nodes count in the snapshot.

Definition at line 6299 of file api.cc.

Referenced by TEST().

const HeapGraphNode * GetRoot

(

)

const

Returns the root node of the heap graph.

Definition at line 6284 of file api.cc.

Referenced by HasWeakGlobalHandle(), and TEST().

Handle< String > GetTitle

(

)

const

Returns heap snapshot title.

Definition at line 6276 of file api.cc.

References Isolate::factory(), and Factory::LookupAsciiSymbol().

HeapSnapshot::Type GetType

(

)

const

Returns heap snapshot type.

Definition at line 6262 of file api.cc.

unsigned GetUid

(

)

const

Returns heap snapshot UID (assigned by the profiler.)

Definition at line 6269 of file api.cc.

Referenced by TEST().

void Serialize	(	OutputStream *	stream,
		HeapSnapshot::SerializationFormat	format
	)		const

Prepare a serialized representation of the snapshot. The result is written into the stream provided in chunks of specified size. The total length of the serialized snapshot is unknown in advance, it can be roughly equal to JS heap size (that means, it can be really big - tens of megabytes).

For the JSON format, heap contents are represented as an object with the following structure:

{ snapshot: { title: "...", uid: nnn, meta: { meta-info }, node_count: nnn, edge_count: nnn }, nodes: [nodes array], edges: [edges array], strings: [strings array] }

Nodes reference strings, other nodes, and edges by their indexes in corresponding arrays.

Definition at line 6321 of file api.cc.

References OutputStream::GetChunkSize(), OutputStream::GetOutputEncoding(), and OutputStream::kAscii.

Referenced by TEST().

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

• include/v8-profiler.h
• src/api.cc