blob: 984d5e7388c81401ba571f73baad30d1c1c07b9e [file] [log] [blame]
/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "bindings/v8/SerializedScriptValue.h"
#include "V8Blob.h"
#include "V8DOMFileSystem.h"
#include "V8File.h"
#include "V8FileList.h"
#include "V8ImageData.h"
#include "V8MessagePort.h"
#include "bindings/v8/V8Binding.h"
#include "bindings/v8/V8Utilities.h"
#include "bindings/v8/custom/V8ArrayBufferCustom.h"
#include "bindings/v8/custom/V8ArrayBufferViewCustom.h"
#include "bindings/v8/custom/V8DataViewCustom.h"
#include "bindings/v8/custom/V8Float32ArrayCustom.h"
#include "bindings/v8/custom/V8Float64ArrayCustom.h"
#include "bindings/v8/custom/V8Int16ArrayCustom.h"
#include "bindings/v8/custom/V8Int32ArrayCustom.h"
#include "bindings/v8/custom/V8Int8ArrayCustom.h"
#include "bindings/v8/custom/V8Uint16ArrayCustom.h"
#include "bindings/v8/custom/V8Uint32ArrayCustom.h"
#include "bindings/v8/custom/V8Uint8ArrayCustom.h"
#include "bindings/v8/custom/V8Uint8ClampedArrayCustom.h"
#include "core/dom/ExceptionCode.h"
#include "core/dom/MessagePort.h"
#include "core/fileapi/Blob.h"
#include "core/fileapi/File.h"
#include "core/fileapi/FileList.h"
#include "core/html/ImageData.h"
#include "core/html/canvas/DataView.h"
#include "platform/SharedBuffer.h"
#include "wtf/ArrayBuffer.h"
#include "wtf/ArrayBufferContents.h"
#include "wtf/ArrayBufferView.h"
#include "wtf/Assertions.h"
#include "wtf/ByteOrder.h"
#include "wtf/Float32Array.h"
#include "wtf/Float64Array.h"
#include "wtf/Int16Array.h"
#include "wtf/Int32Array.h"
#include "wtf/Int8Array.h"
#include "wtf/RefCounted.h"
#include "wtf/Uint16Array.h"
#include "wtf/Uint32Array.h"
#include "wtf/Uint8Array.h"
#include "wtf/Uint8ClampedArray.h"
#include "wtf/Vector.h"
#include "wtf/text/StringBuffer.h"
#include "wtf/text/StringUTF8Adaptor.h"
// FIXME: consider crashing in debug mode on deserialization errors
// NOTE: be sure to change wireFormatVersion as necessary!
namespace WebCore {
namespace {
// This code implements the HTML5 Structured Clone algorithm:
// http://www.whatwg.org/specs/web-apps/current-work/multipage/urls.html#safe-passing-of-structured-data
// V8ObjectMap is a map from V8 objects to arbitrary values of type T.
// V8 objects (or handles to V8 objects) cannot be used as keys in ordinary wtf::HashMaps;
// this class should be used instead. GCObject must be a subtype of v8::Object.
// Suggested usage:
// V8ObjectMap<v8::Object, int> map;
// v8::Handle<v8::Object> obj = ...;
// map.set(obj, 42);
template<typename GCObject, typename T>
class V8ObjectMap {
public:
bool contains(const v8::Handle<GCObject>& handle)
{
return m_map.contains(*handle);
}
bool tryGet(const v8::Handle<GCObject>& handle, T* valueOut)
{
typename HandleToT::iterator result = m_map.find(*handle);
if (result != m_map.end()) {
*valueOut = result->value;
return true;
}
return false;
}
void set(const v8::Handle<GCObject>& handle, const T& value)
{
m_map.set(*handle, value);
}
uint32_t size()
{
return m_map.size();
}
private:
// This implementation uses GetIdentityHash(), which sets a hidden property on the object containing
// a random integer (or returns the one that had been previously set). This ensures that the table
// never needs to be rebuilt across garbage collections at the expense of doing additional allocation
// and making more round trips into V8. Note that since GetIdentityHash() is defined only on
// v8::Objects, this V8ObjectMap cannot be used to map v8::Strings to T (because the public V8 API
// considers a v8::String to be a v8::Primitive).
// If V8 exposes a way to get at the address of the object held by a handle, then we can produce
// an alternate implementation that does not need to do any V8-side allocation; however, it will
// need to rehash after every garbage collection because a key object may have been moved.
template<typename G>
struct V8HandlePtrHash {
static unsigned hash(const G* key)
{
return static_cast<unsigned>(unsafeHandleFromRawValue(key)->GetIdentityHash());
}
static bool equal(const G* a, const G* b)
{
return unsafeHandleFromRawValue(a) == unsafeHandleFromRawValue(b);
}
// For HashArg.
static const bool safeToCompareToEmptyOrDeleted = false;
};
typedef WTF::HashMap<GCObject*, T, V8HandlePtrHash<GCObject> > HandleToT;
HandleToT m_map;
};
typedef UChar BufferValueType;
// Serialization format is a sequence of tags followed by zero or more data arguments.
// Tags always take exactly one byte. A serialized stream first begins with
// a complete VersionTag. If the stream does not begin with a VersionTag, we assume that
// the stream is in format 0.
// This format is private to the implementation of SerializedScriptValue. Do not rely on it
// externally. It is safe to persist a SerializedScriptValue as a binary blob, but this
// code should always be used to interpret it.
// WebCoreStrings are read as (length:uint32_t, string:UTF8[length]).
// RawStrings are read as (length:uint32_t, string:UTF8[length]).
// RawUCharStrings are read as (length:uint32_t, string:UChar[length/sizeof(UChar)]).
// RawFiles are read as (path:WebCoreString, url:WebCoreStrng, type:WebCoreString).
// There is a reference table that maps object references (uint32_t) to v8::Values.
// Tokens marked with (ref) are inserted into the reference table and given the next object reference ID after decoding.
// All tags except InvalidTag, PaddingTag, ReferenceCountTag, VersionTag, GenerateFreshObjectTag
// and GenerateFreshArrayTag push their results to the deserialization stack.
// There is also an 'open' stack that is used to resolve circular references. Objects or arrays may
// contain self-references. Before we begin to deserialize the contents of these values, they
// are first given object reference IDs (by GenerateFreshObjectTag/GenerateFreshArrayTag);
// these reference IDs are then used with ObjectReferenceTag to tie the recursive knot.
enum SerializationTag {
InvalidTag = '!', // Causes deserialization to fail.
PaddingTag = '\0', // Is ignored (but consumed).
UndefinedTag = '_', // -> <undefined>
NullTag = '0', // -> <null>
TrueTag = 'T', // -> <true>
FalseTag = 'F', // -> <false>
StringTag = 'S', // string:RawString -> string
StringUCharTag = 'c', // string:RawUCharString -> string
Int32Tag = 'I', // value:ZigZag-encoded int32 -> Integer
Uint32Tag = 'U', // value:uint32_t -> Integer
DateTag = 'D', // value:double -> Date (ref)
MessagePortTag = 'M', // index:int -> MessagePort. Fills the result with transferred MessagePort.
NumberTag = 'N', // value:double -> Number
BlobTag = 'b', // url:WebCoreString, type:WebCoreString, size:uint64_t -> Blob (ref)
FileTag = 'f', // file:RawFile -> File (ref)
DOMFileSystemTag = 'd', // type:int32_t, name:WebCoreString, url:WebCoreString -> FileSystem (ref)
FileListTag = 'l', // length:uint32_t, files:RawFile[length] -> FileList (ref)
ImageDataTag = '#', // width:uint32_t, height:uint32_t, pixelDataLength:uint32_t, data:byte[pixelDataLength] -> ImageData (ref)
ObjectTag = '{', // numProperties:uint32_t -> pops the last object from the open stack;
// fills it with the last numProperties name,value pairs pushed onto the deserialization stack
SparseArrayTag = '@', // numProperties:uint32_t, length:uint32_t -> pops the last object from the open stack;
// fills it with the last numProperties name,value pairs pushed onto the deserialization stack
DenseArrayTag = '$', // numProperties:uint32_t, length:uint32_t -> pops the last object from the open stack;
// fills it with the last length elements and numProperties name,value pairs pushed onto deserialization stack
RegExpTag = 'R', // pattern:RawString, flags:uint32_t -> RegExp (ref)
ArrayBufferTag = 'B', // byteLength:uint32_t, data:byte[byteLength] -> ArrayBuffer (ref)
ArrayBufferTransferTag = 't', // index:uint32_t -> ArrayBuffer. For ArrayBuffer transfer
ArrayBufferViewTag = 'V', // subtag:byte, byteOffset:uint32_t, byteLength:uint32_t -> ArrayBufferView (ref). Consumes an ArrayBuffer from the top of the deserialization stack.
ObjectReferenceTag = '^', // ref:uint32_t -> reference table[ref]
GenerateFreshObjectTag = 'o', // -> empty object allocated an object ID and pushed onto the open stack (ref)
GenerateFreshSparseArrayTag = 'a', // length:uint32_t -> empty array[length] allocated an object ID and pushed onto the open stack (ref)
GenerateFreshDenseArrayTag = 'A', // length:uint32_t -> empty array[length] allocated an object ID and pushed onto the open stack (ref)
ReferenceCountTag = '?', // refTableSize:uint32_t -> If the reference table is not refTableSize big, fails.
StringObjectTag = 's', // string:RawString -> new String(string) (ref)
NumberObjectTag = 'n', // value:double -> new Number(value) (ref)
TrueObjectTag = 'y', // new Boolean(true) (ref)
FalseObjectTag = 'x', // new Boolean(false) (ref)
VersionTag = 0xFF // version:uint32_t -> Uses this as the file version.
};
enum ArrayBufferViewSubTag {
ByteArrayTag = 'b',
UnsignedByteArrayTag = 'B',
UnsignedByteClampedArrayTag = 'C',
ShortArrayTag = 'w',
UnsignedShortArrayTag = 'W',
IntArrayTag = 'd',
UnsignedIntArrayTag = 'D',
FloatArrayTag = 'f',
DoubleArrayTag = 'F',
DataViewTag = '?'
};
static bool shouldCheckForCycles(int depth)
{
ASSERT(depth >= 0);
// Since we are not required to spot the cycle as soon as it
// happens we can check for cycles only when the current depth
// is a power of two.
return !(depth & (depth - 1));
}
static const int maxDepth = 20000;
// VarInt encoding constants.
static const int varIntShift = 7;
static const int varIntMask = (1 << varIntShift) - 1;
// ZigZag encoding helps VarInt encoding stay small for negative
// numbers with small absolute values.
class ZigZag {
public:
static uint32_t encode(uint32_t value)
{
if (value & (1U << 31))
value = ((~value) << 1) + 1;
else
value <<= 1;
return value;
}
static uint32_t decode(uint32_t value)
{
if (value & 1)
value = ~(value >> 1);
else
value >>= 1;
return value;
}
private:
ZigZag();
};
// Writer is responsible for serializing primitive types and storing
// information used to reconstruct composite types.
class Writer {
WTF_MAKE_NONCOPYABLE(Writer);
public:
explicit Writer(v8::Isolate* isolate)
: m_position(0)
, m_isolate(isolate)
{
}
// Write functions for primitive types.
void writeUndefined() { append(UndefinedTag); }
void writeNull() { append(NullTag); }
void writeTrue() { append(TrueTag); }
void writeFalse() { append(FalseTag); }
void writeBooleanObject(bool value)
{
append(value ? TrueObjectTag : FalseObjectTag);
}
void writeString(const char* data, int length)
{
ASSERT(length >= 0);
append(StringTag);
doWriteString(data, length);
}
void writeOneByteString(v8::Handle<v8::String>& string)
{
int stringLength = string->Length();
int utf8Length = string->Utf8Length();
ASSERT(stringLength >= 0 && utf8Length >= 0);
append(StringTag);
doWriteUint32(static_cast<uint32_t>(utf8Length));
ensureSpace(utf8Length);
// ASCII fast path.
if (stringLength == utf8Length)
string->WriteOneByte(byteAt(m_position), 0, utf8Length, v8StringWriteOptions());
else {
char* buffer = reinterpret_cast<char*>(byteAt(m_position));
string->WriteUtf8(buffer, utf8Length, 0, v8StringWriteOptions());
}
m_position += utf8Length;
}
void writeUCharString(v8::Handle<v8::String>& string)
{
int length = string->Length();
ASSERT(length >= 0);
int size = length * sizeof(UChar);
int bytes = bytesNeededToWireEncode(static_cast<uint32_t>(size));
if ((m_position + 1 + bytes) & 1)
append(PaddingTag);
append(StringUCharTag);
doWriteUint32(static_cast<uint32_t>(size));
ensureSpace(size);
ASSERT(!(m_position & 1));
uint16_t* buffer = reinterpret_cast<uint16_t*>(byteAt(m_position));
string->Write(buffer, 0, length, v8StringWriteOptions());
m_position += size;
}
void writeStringObject(const char* data, int length)
{
ASSERT(length >= 0);
append(StringObjectTag);
doWriteString(data, length);
}
void writeWebCoreString(const String& string)
{
// Uses UTF8 encoding so we can read it back as either V8 or
// WebCore string.
append(StringTag);
doWriteWebCoreString(string);
}
void writeVersion()
{
append(VersionTag);
doWriteUint32(SerializedScriptValue::wireFormatVersion);
}
void writeInt32(int32_t value)
{
append(Int32Tag);
doWriteUint32(ZigZag::encode(static_cast<uint32_t>(value)));
}
void writeUint32(uint32_t value)
{
append(Uint32Tag);
doWriteUint32(value);
}
void writeDate(double numberValue)
{
append(DateTag);
doWriteNumber(numberValue);
}
void writeNumber(double number)
{
append(NumberTag);
doWriteNumber(number);
}
void writeNumberObject(double number)
{
append(NumberObjectTag);
doWriteNumber(number);
}
void writeBlob(const String& uuid, const String& type, unsigned long long size)
{
append(BlobTag);
doWriteWebCoreString(uuid);
doWriteWebCoreString(type);
doWriteUint64(size);
}
void writeDOMFileSystem(int type, const String& name, const String& url)
{
append(DOMFileSystemTag);
doWriteUint32(type);
doWriteWebCoreString(name);
doWriteWebCoreString(url);
}
void writeFile(const File& file)
{
append(FileTag);
doWriteFile(file);
}
void writeFileList(const FileList& fileList)
{
append(FileListTag);
uint32_t length = fileList.length();
doWriteUint32(length);
for (unsigned i = 0; i < length; ++i)
doWriteFile(*fileList.item(i));
}
void writeArrayBuffer(const ArrayBuffer& arrayBuffer)
{
append(ArrayBufferTag);
doWriteArrayBuffer(arrayBuffer);
}
void writeArrayBufferView(const ArrayBufferView& arrayBufferView)
{
append(ArrayBufferViewTag);
#ifndef NDEBUG
const ArrayBuffer& arrayBuffer = *arrayBufferView.buffer();
ASSERT(static_cast<const uint8_t*>(arrayBuffer.data()) + arrayBufferView.byteOffset() ==
static_cast<const uint8_t*>(arrayBufferView.baseAddress()));
#endif
ArrayBufferView::ViewType type = arrayBufferView.getType();
if (type == ArrayBufferView::TypeInt8)
append(ByteArrayTag);
else if (type == ArrayBufferView::TypeUint8Clamped)
append(UnsignedByteClampedArrayTag);
else if (type == ArrayBufferView::TypeUint8)
append(UnsignedByteArrayTag);
else if (type == ArrayBufferView::TypeInt16)
append(ShortArrayTag);
else if (type == ArrayBufferView::TypeUint16)
append(UnsignedShortArrayTag);
else if (type == ArrayBufferView::TypeInt32)
append(IntArrayTag);
else if (type == ArrayBufferView::TypeUint32)
append(UnsignedIntArrayTag);
else if (type == ArrayBufferView::TypeFloat32)
append(FloatArrayTag);
else if (type == ArrayBufferView::TypeFloat64)
append(DoubleArrayTag);
else if (type == ArrayBufferView::TypeDataView)
append(DataViewTag);
else
ASSERT_NOT_REACHED();
doWriteUint32(arrayBufferView.byteOffset());
doWriteUint32(arrayBufferView.byteLength());
}
void writeImageData(uint32_t width, uint32_t height, const uint8_t* pixelData, uint32_t pixelDataLength)
{
append(ImageDataTag);
doWriteUint32(width);
doWriteUint32(height);
doWriteUint32(pixelDataLength);
append(pixelData, pixelDataLength);
}
void writeRegExp(v8::Local<v8::String> pattern, v8::RegExp::Flags flags)
{
append(RegExpTag);
v8::String::Utf8Value patternUtf8Value(pattern);
doWriteString(*patternUtf8Value, patternUtf8Value.length());
doWriteUint32(static_cast<uint32_t>(flags));
}
void writeTransferredMessagePort(uint32_t index)
{
append(MessagePortTag);
doWriteUint32(index);
}
void writeTransferredArrayBuffer(uint32_t index)
{
append(ArrayBufferTransferTag);
doWriteUint32(index);
}
void writeObjectReference(uint32_t reference)
{
append(ObjectReferenceTag);
doWriteUint32(reference);
}
void writeObject(uint32_t numProperties)
{
append(ObjectTag);
doWriteUint32(numProperties);
}
void writeSparseArray(uint32_t numProperties, uint32_t length)
{
append(SparseArrayTag);
doWriteUint32(numProperties);
doWriteUint32(length);
}
void writeDenseArray(uint32_t numProperties, uint32_t length)
{
append(DenseArrayTag);
doWriteUint32(numProperties);
doWriteUint32(length);
}
String takeWireString()
{
COMPILE_ASSERT(sizeof(BufferValueType) == 2, BufferValueTypeIsTwoBytes);
fillHole();
String data = String(m_buffer.data(), m_buffer.size());
data.impl()->truncateAssumingIsolated((m_position + 1) / sizeof(BufferValueType));
return data;
}
void writeReferenceCount(uint32_t numberOfReferences)
{
append(ReferenceCountTag);
doWriteUint32(numberOfReferences);
}
void writeGenerateFreshObject()
{
append(GenerateFreshObjectTag);
}
void writeGenerateFreshSparseArray(uint32_t length)
{
append(GenerateFreshSparseArrayTag);
doWriteUint32(length);
}
void writeGenerateFreshDenseArray(uint32_t length)
{
append(GenerateFreshDenseArrayTag);
doWriteUint32(length);
}
v8::Isolate* getIsolate() { return m_isolate; }
private:
void doWriteFile(const File& file)
{
doWriteWebCoreString(file.path());
doWriteWebCoreString(file.uuid());
doWriteWebCoreString(file.type());
}
void doWriteArrayBuffer(const ArrayBuffer& arrayBuffer)
{
uint32_t byteLength = arrayBuffer.byteLength();
doWriteUint32(byteLength);
append(static_cast<const uint8_t*>(arrayBuffer.data()), byteLength);
}
void doWriteString(const char* data, int length)
{
doWriteUint32(static_cast<uint32_t>(length));
append(reinterpret_cast<const uint8_t*>(data), length);
}
void doWriteWebCoreString(const String& string)
{
StringUTF8Adaptor stringUTF8(string);
doWriteString(stringUTF8.data(), stringUTF8.length());
}
int bytesNeededToWireEncode(uint32_t value)
{
int bytes = 1;
while (true) {
value >>= varIntShift;
if (!value)
break;
++bytes;
}
return bytes;
}
template<class T>
void doWriteUintHelper(T value)
{
while (true) {
uint8_t b = (value & varIntMask);
value >>= varIntShift;
if (!value) {
append(b);
break;
}
append(b | (1 << varIntShift));
}
}
void doWriteUint32(uint32_t value)
{
doWriteUintHelper(value);
}
void doWriteUint64(uint64_t value)
{
doWriteUintHelper(value);
}
void doWriteNumber(double number)
{
append(reinterpret_cast<uint8_t*>(&number), sizeof(number));
}
void append(SerializationTag tag)
{
append(static_cast<uint8_t>(tag));
}
void append(uint8_t b)
{
ensureSpace(1);
*byteAt(m_position++) = b;
}
void append(const uint8_t* data, int length)
{
ensureSpace(length);
memcpy(byteAt(m_position), data, length);
m_position += length;
}
void ensureSpace(unsigned extra)
{
COMPILE_ASSERT(sizeof(BufferValueType) == 2, BufferValueTypeIsTwoBytes);
m_buffer.resize((m_position + extra + 1) / sizeof(BufferValueType)); // "+ 1" to round up.
}
void fillHole()
{
COMPILE_ASSERT(sizeof(BufferValueType) == 2, BufferValueTypeIsTwoBytes);
// If the writer is at odd position in the buffer, then one of
// the bytes in the last UChar is not initialized.
if (m_position % 2)
*byteAt(m_position) = static_cast<uint8_t>(PaddingTag);
}
uint8_t* byteAt(int position)
{
return reinterpret_cast<uint8_t*>(m_buffer.data()) + position;
}
int v8StringWriteOptions()
{
return v8::String::NO_NULL_TERMINATION;
}
Vector<BufferValueType> m_buffer;
unsigned m_position;
v8::Isolate* m_isolate;
};
static v8::Handle<v8::Object> toV8Object(MessagePort* impl, v8::Isolate* isolate)
{
if (!impl)
return v8::Handle<v8::Object>();
v8::Handle<v8::Value> wrapper = toV8(impl, v8::Handle<v8::Object>(), isolate);
ASSERT(wrapper->IsObject());
return wrapper.As<v8::Object>();
}
static v8::Handle<v8::ArrayBuffer> toV8Object(ArrayBuffer* impl, v8::Isolate* isolate)
{
if (!impl)
return v8::Handle<v8::ArrayBuffer>();
v8::Handle<v8::Value> wrapper = toV8(impl, v8::Handle<v8::Object>(), isolate);
ASSERT(wrapper->IsArrayBuffer());
return wrapper.As<v8::ArrayBuffer>();
}
class Serializer {
class StateBase;
public:
enum Status {
Success,
InputError,
DataCloneError,
InvalidStateError,
JSException,
JSFailure
};
Serializer(Writer& writer, MessagePortArray* messagePorts, ArrayBufferArray* arrayBuffers, BlobDataHandleMap& blobDataHandles, v8::TryCatch& tryCatch, v8::Isolate* isolate)
: m_writer(writer)
, m_tryCatch(tryCatch)
, m_depth(0)
, m_execDepth(0)
, m_status(Success)
, m_nextObjectReference(0)
, m_blobDataHandles(blobDataHandles)
, m_isolate(isolate)
{
ASSERT(!tryCatch.HasCaught());
if (messagePorts) {
for (size_t i = 0; i < messagePorts->size(); i++)
m_transferredMessagePorts.set(toV8Object(messagePorts->at(i).get(), m_writer.getIsolate()), i);
}
if (arrayBuffers) {
for (size_t i = 0; i < arrayBuffers->size(); i++) {
v8::Handle<v8::Object> v8ArrayBuffer = toV8Object(arrayBuffers->at(i).get(), m_writer.getIsolate());
// Coalesce multiple occurences of the same buffer to the first index.
if (!m_transferredArrayBuffers.contains(v8ArrayBuffer))
m_transferredArrayBuffers.set(v8ArrayBuffer, i);
}
}
}
Status serialize(v8::Handle<v8::Value> value)
{
v8::HandleScope scope(m_isolate);
m_writer.writeVersion();
StateBase* state = doSerialize(value, 0);
while (state)
state = state->advance(*this);
return m_status;
}
// Functions used by serialization states.
StateBase* doSerialize(v8::Handle<v8::Value> value, StateBase* next);
StateBase* checkException(StateBase* state)
{
return m_tryCatch.HasCaught() ? handleError(JSException, state) : 0;
}
StateBase* reportFailure(StateBase* state)
{
return handleError(JSFailure, state);
}
StateBase* writeObject(uint32_t numProperties, StateBase* state)
{
m_writer.writeObject(numProperties);
return pop(state);
}
StateBase* writeSparseArray(uint32_t numProperties, uint32_t length, StateBase* state)
{
m_writer.writeSparseArray(numProperties, length);
return pop(state);
}
StateBase* writeDenseArray(uint32_t numProperties, uint32_t length, StateBase* state)
{
m_writer.writeDenseArray(numProperties, length);
return pop(state);
}
private:
class StateBase {
WTF_MAKE_NONCOPYABLE(StateBase);
public:
virtual ~StateBase() { }
// Link to the next state to form a stack.
StateBase* nextState() { return m_next; }
// Composite object we're processing in this state.
v8::Handle<v8::Value> composite() { return m_composite; }
// Serializes (a part of) the current composite and returns
// the next state to process or null when this is the final
// state.
virtual StateBase* advance(Serializer&) = 0;
// Returns 1 if this state is currently serializing a property
// via an accessor and 0 otherwise.
virtual uint32_t execDepth() const { return 0; }
protected:
StateBase(v8::Handle<v8::Value> composite, StateBase* next)
: m_composite(composite)
, m_next(next)
{
}
private:
v8::Handle<v8::Value> m_composite;
StateBase* m_next;
};
// Dummy state that is used to signal serialization errors.
class ErrorState : public StateBase {
public:
ErrorState()
: StateBase(v8Undefined(), 0)
{
}
virtual StateBase* advance(Serializer&)
{
delete this;
return 0;
}
};
template <typename T>
class State : public StateBase {
public:
v8::Handle<T> composite() { return v8::Handle<T>::Cast(StateBase::composite()); }
protected:
State(v8::Handle<T> composite, StateBase* next)
: StateBase(composite, next)
{
}
};
class AbstractObjectState : public State<v8::Object> {
public:
AbstractObjectState(v8::Handle<v8::Object> object, StateBase* next)
: State<v8::Object>(object, next)
, m_index(0)
, m_numSerializedProperties(0)
, m_nameDone(false)
, m_isSerializingAccessor(false)
{
}
virtual uint32_t execDepth() const { return m_isSerializingAccessor ? 1 : 0; }
protected:
virtual StateBase* objectDone(unsigned numProperties, Serializer&) = 0;
StateBase* serializeProperties(bool ignoreIndexed, Serializer& serializer)
{
m_isSerializingAccessor = false;
while (m_index < m_propertyNames->Length()) {
bool isAccessor = false;
if (!m_nameDone) {
v8::Local<v8::Value> propertyName = m_propertyNames->Get(m_index);
if (StateBase* newState = serializer.checkException(this))
return newState;
if (propertyName.IsEmpty())
return serializer.reportFailure(this);
bool hasStringProperty = propertyName->IsString() && composite()->HasRealNamedProperty(propertyName.As<v8::String>());
if (StateBase* newState = serializer.checkException(this))
return newState;
bool hasIndexedProperty = !hasStringProperty && propertyName->IsUint32() && composite()->HasRealIndexedProperty(propertyName->Uint32Value());
if (StateBase* newState = serializer.checkException(this))
return newState;
isAccessor = hasStringProperty && composite()->HasRealNamedCallbackProperty(propertyName.As<v8::String>());
if (StateBase* newState = serializer.checkException(this))
return newState;
if (hasStringProperty || (hasIndexedProperty && !ignoreIndexed))
m_propertyName = propertyName;
else {
++m_index;
continue;
}
}
ASSERT(!m_propertyName.IsEmpty());
if (!m_nameDone) {
m_nameDone = true;
if (StateBase* newState = serializer.doSerialize(m_propertyName, this))
return newState;
}
v8::Local<v8::Value> value = composite()->Get(m_propertyName);
if (StateBase* newState = serializer.checkException(this))
return newState;
m_nameDone = false;
m_propertyName.Clear();
++m_index;
++m_numSerializedProperties;
m_isSerializingAccessor = isAccessor;
// If we return early here, it's either because we have pushed a new state onto the
// serialization state stack or because we have encountered an error (and in both cases
// we are unwinding the native stack). We reset m_isSerializingAccessor at the beginning
// of advance() for this case (because advance() will be called on us again once we
// are the top of the stack).
if (StateBase* newState = serializer.doSerialize(value, this))
return newState;
m_isSerializingAccessor = false;
}
return objectDone(m_numSerializedProperties, serializer);
}
v8::Local<v8::Array> m_propertyNames;
private:
v8::Local<v8::Value> m_propertyName;
unsigned m_index;
unsigned m_numSerializedProperties;
bool m_nameDone;
// Used along with execDepth() to determine the number of
// accessors under which the serializer is currently serializing.
bool m_isSerializingAccessor;
};
class ObjectState : public AbstractObjectState {
public:
ObjectState(v8::Handle<v8::Object> object, StateBase* next)
: AbstractObjectState(object, next)
{
}
virtual StateBase* advance(Serializer& serializer)
{
if (m_propertyNames.IsEmpty()) {
m_propertyNames = composite()->GetPropertyNames();
if (StateBase* newState = serializer.checkException(this))
return newState;
if (m_propertyNames.IsEmpty())
return serializer.reportFailure(this);
}
return serializeProperties(false, serializer);
}
protected:
virtual StateBase* objectDone(unsigned numProperties, Serializer& serializer)
{
return serializer.writeObject(numProperties, this);
}
};
class DenseArrayState : public AbstractObjectState {
public:
DenseArrayState(v8::Handle<v8::Array> array, v8::Handle<v8::Array> propertyNames, StateBase* next, v8::Isolate* isolate)
: AbstractObjectState(array, next)
, m_arrayIndex(0)
, m_arrayLength(array->Length())
{
m_propertyNames = v8::Local<v8::Array>::New(isolate, propertyNames);
}
virtual StateBase* advance(Serializer& serializer)
{
while (m_arrayIndex < m_arrayLength) {
v8::Handle<v8::Value> value = composite().As<v8::Array>()->Get(m_arrayIndex);
m_arrayIndex++;
if (StateBase* newState = serializer.checkException(this))
return newState;
if (StateBase* newState = serializer.doSerialize(value, this))
return newState;
}
return serializeProperties(true, serializer);
}
protected:
virtual StateBase* objectDone(unsigned numProperties, Serializer& serializer)
{
return serializer.writeDenseArray(numProperties, m_arrayLength, this);
}
private:
uint32_t m_arrayIndex;
uint32_t m_arrayLength;
};
class SparseArrayState : public AbstractObjectState {
public:
SparseArrayState(v8::Handle<v8::Array> array, v8::Handle<v8::Array> propertyNames, StateBase* next, v8::Isolate* isolate)
: AbstractObjectState(array, next)
{
m_propertyNames = v8::Local<v8::Array>::New(isolate, propertyNames);
}
virtual StateBase* advance(Serializer& serializer)
{
return serializeProperties(false, serializer);
}
protected:
virtual StateBase* objectDone(unsigned numProperties, Serializer& serializer)
{
return serializer.writeSparseArray(numProperties, composite().As<v8::Array>()->Length(), this);
}
};
uint32_t execDepth() const
{
return m_execDepth;
}
StateBase* push(StateBase* state)
{
ASSERT(state);
if (state->nextState())
m_execDepth += state->nextState()->execDepth();
++m_depth;
return checkComposite(state) ? state : handleError(InputError, state);
}
StateBase* pop(StateBase* state)
{
ASSERT(state);
--m_depth;
StateBase* next = state->nextState();
if (next)
m_execDepth -= next->execDepth();
delete state;
return next;
}
StateBase* handleError(Status errorStatus, StateBase* state)
{
ASSERT(errorStatus != Success);
m_status = errorStatus;
while (state) {
StateBase* tmp = state->nextState();
delete state;
state = tmp;
if (state)
m_execDepth -= state->execDepth();
}
return new ErrorState;
}
bool checkComposite(StateBase* top)
{
ASSERT(top);
if (m_depth > maxDepth)
return false;
if (!shouldCheckForCycles(m_depth))
return true;
v8::Handle<v8::Value> composite = top->composite();
for (StateBase* state = top->nextState(); state; state = state->nextState()) {
if (state->composite() == composite)
return false;
}
return true;
}
void writeString(v8::Handle<v8::Value> value)
{
v8::Handle<v8::String> string = value.As<v8::String>();
if (!string->Length() || string->IsOneByte())
m_writer.writeOneByteString(string);
else
m_writer.writeUCharString(string);
}
void writeStringObject(v8::Handle<v8::Value> value)
{
v8::Handle<v8::StringObject> stringObject = value.As<v8::StringObject>();
v8::String::Utf8Value stringValue(stringObject->StringValue());
m_writer.writeStringObject(*stringValue, stringValue.length());
}
void writeNumberObject(v8::Handle<v8::Value> value)
{
v8::Handle<v8::NumberObject> numberObject = value.As<v8::NumberObject>();
m_writer.writeNumberObject(numberObject->NumberValue());
}
void writeBooleanObject(v8::Handle<v8::Value> value)
{
v8::Handle<v8::BooleanObject> booleanObject = value.As<v8::BooleanObject>();
m_writer.writeBooleanObject(booleanObject->BooleanValue());
}
void writeBlob(v8::Handle<v8::Value> value)
{
Blob* blob = V8Blob::toNative(value.As<v8::Object>());
if (!blob)
return;
m_writer.writeBlob(blob->uuid(), blob->type(), blob->size());
m_blobDataHandles.add(blob->uuid(), blob->blobDataHandle());
}
StateBase* writeDOMFileSystem(v8::Handle<v8::Value> value, StateBase* next)
{
DOMFileSystem* fs = V8DOMFileSystem::toNative(value.As<v8::Object>());
if (!fs)
return 0;
if (!fs->clonable())
return handleError(DataCloneError, next);
m_writer.writeDOMFileSystem(fs->type(), fs->name(), fs->rootURL().string());
return 0;
}
void writeFile(v8::Handle<v8::Value> value)
{
File* file = V8File::toNative(value.As<v8::Object>());
if (!file)
return;
m_writer.writeFile(*file);
m_blobDataHandles.add(file->uuid(), file->blobDataHandle());
}
void writeFileList(v8::Handle<v8::Value> value)
{
FileList* fileList = V8FileList::toNative(value.As<v8::Object>());
if (!fileList)
return;
m_writer.writeFileList(*fileList);
unsigned length = fileList->length();
for (unsigned i = 0; i < length; ++i)
m_blobDataHandles.add(fileList->item(i)->uuid(), fileList->item(i)->blobDataHandle());
}
void writeImageData(v8::Handle<v8::Value> value)
{
ImageData* imageData = V8ImageData::toNative(value.As<v8::Object>());
if (!imageData)
return;
Uint8ClampedArray* pixelArray = imageData->data();
m_writer.writeImageData(imageData->width(), imageData->height(), pixelArray->data(), pixelArray->length());
}
void writeRegExp(v8::Handle<v8::Value> value)
{
v8::Handle<v8::RegExp> regExp = value.As<v8::RegExp>();
m_writer.writeRegExp(regExp->GetSource(), regExp->GetFlags());
}
StateBase* writeAndGreyArrayBufferView(v8::Handle<v8::Object> object, StateBase* next)
{
ASSERT(!object.IsEmpty());
ArrayBufferView* arrayBufferView = V8ArrayBufferView::toNative(object);
if (!arrayBufferView)
return 0;
if (!arrayBufferView->buffer())
return handleError(DataCloneError, next);
v8::Handle<v8::Value> underlyingBuffer = toV8(arrayBufferView->buffer(), v8::Handle<v8::Object>(), m_writer.getIsolate());
if (underlyingBuffer.IsEmpty())
return handleError(DataCloneError, next);
StateBase* stateOut = doSerialize(underlyingBuffer, 0);
if (stateOut)
return handleError(DataCloneError, next);
m_writer.writeArrayBufferView(*arrayBufferView);
// This should be safe: we serialize something that we know to be a wrapper (see
// the toV8 call above), so the call to doSerialize above should neither cause
// the stack to overflow nor should it have the potential to reach this
// ArrayBufferView again. We do need to grey the underlying buffer before we grey
// its view, however; ArrayBuffers may be shared, so they need to be given reference IDs,
// and an ArrayBufferView cannot be constructed without a corresponding ArrayBuffer
// (or without an additional tag that would allow us to do two-stage construction
// like we do for Objects and Arrays).
greyObject(object);
return 0;
}
StateBase* writeArrayBuffer(v8::Handle<v8::Value> value, StateBase* next)
{
ArrayBuffer* arrayBuffer = V8ArrayBuffer::toNative(value.As<v8::Object>());
if (!arrayBuffer)
return 0;
if (arrayBuffer->isNeutered())
return handleError(InvalidStateError, next);
ASSERT(!m_transferredArrayBuffers.contains(value.As<v8::Object>()));
m_writer.writeArrayBuffer(*arrayBuffer);
return 0;
}
StateBase* writeTransferredArrayBuffer(v8::Handle<v8::Value> value, uint32_t index, StateBase* next)
{
ArrayBuffer* arrayBuffer = V8ArrayBuffer::toNative(value.As<v8::Object>());
if (!arrayBuffer)
return 0;
if (arrayBuffer->isNeutered())
return handleError(DataCloneError, next);
m_writer.writeTransferredArrayBuffer(index);
return 0;
}
static bool shouldSerializeDensely(uint32_t length, uint32_t propertyCount)
{
// Let K be the cost of serializing all property values that are there
// Cost of serializing sparsely: 5*propertyCount + K (5 bytes per uint32_t key)
// Cost of serializing densely: K + 1*(length - propertyCount) (1 byte for all properties that are not there)
// so densely is better than sparsly whenever 6*propertyCount > length
return 6 * propertyCount >= length;
}
StateBase* startArrayState(v8::Handle<v8::Array> array, StateBase* next)
{
v8::Handle<v8::Array> propertyNames = array->GetPropertyNames();
if (StateBase* newState = checkException(next))
return newState;
uint32_t length = array->Length();
if (shouldSerializeDensely(length, propertyNames->Length())) {
m_writer.writeGenerateFreshDenseArray(length);
return push(new DenseArrayState(array, propertyNames, next, m_isolate));
}
m_writer.writeGenerateFreshSparseArray(length);
return push(new SparseArrayState(array, propertyNames, next, m_isolate));
}
StateBase* startObjectState(v8::Handle<v8::Object> object, StateBase* next)
{
m_writer.writeGenerateFreshObject();
// FIXME: check not a wrapper
return push(new ObjectState(object, next));
}
// Marks object as having been visited by the serializer and assigns it a unique object reference ID.
// An object may only be greyed once.
void greyObject(const v8::Handle<v8::Object>& object)
{
ASSERT(!m_objectPool.contains(object));
uint32_t objectReference = m_nextObjectReference++;
m_objectPool.set(object, objectReference);
}
Writer& m_writer;
v8::TryCatch& m_tryCatch;
int m_depth;
int m_execDepth;
Status m_status;
typedef V8ObjectMap<v8::Object, uint32_t> ObjectPool;
ObjectPool m_objectPool;
ObjectPool m_transferredMessagePorts;
ObjectPool m_transferredArrayBuffers;
uint32_t m_nextObjectReference;
BlobDataHandleMap& m_blobDataHandles;
v8::Isolate* m_isolate;
};
Serializer::StateBase* Serializer::doSerialize(v8::Handle<v8::Value> value, StateBase* next)
{
if (m_execDepth + (next ? next->execDepth() : 0) > 1) {
m_writer.writeNull();
return 0;
}
m_writer.writeReferenceCount(m_nextObjectReference);
uint32_t objectReference;
uint32_t arrayBufferIndex;
WrapperWorldType currentWorldType = worldType(m_isolate);
if ((value->IsObject() || value->IsDate() || value->IsRegExp())
&& m_objectPool.tryGet(value.As<v8::Object>(), &objectReference)) {
// Note that IsObject() also detects wrappers (eg, it will catch the things
// that we grey and write below).
ASSERT(!value->IsString());
m_writer.writeObjectReference(objectReference);
} else if (value.IsEmpty())
return reportFailure(next);
else if (value->IsUndefined())
m_writer.writeUndefined();
else if (value->IsNull())
m_writer.writeNull();
else if (value->IsTrue())
m_writer.writeTrue();
else if (value->IsFalse())
m_writer.writeFalse();
else if (value->IsInt32())
m_writer.writeInt32(value->Int32Value());
else if (value->IsUint32())
m_writer.writeUint32(value->Uint32Value());
else if (value->IsNumber())
m_writer.writeNumber(value.As<v8::Number>()->Value());
else if (V8ArrayBufferView::HasInstance(value, m_isolate, currentWorldType))
return writeAndGreyArrayBufferView(value.As<v8::Object>(), next);
else if (value->IsString())
writeString(value);
else if (V8MessagePort::HasInstance(value, m_isolate, currentWorldType)) {
uint32_t messagePortIndex;
if (m_transferredMessagePorts.tryGet(value.As<v8::Object>(), &messagePortIndex))
m_writer.writeTransferredMessagePort(messagePortIndex);
else
return handleError(DataCloneError, next);
} else if (V8ArrayBuffer::HasInstance(value, m_isolate, currentWorldType) && m_transferredArrayBuffers.tryGet(value.As<v8::Object>(), &arrayBufferIndex))
return writeTransferredArrayBuffer(value, arrayBufferIndex, next);
else {
v8::Handle<v8::Object> jsObject = value.As<v8::Object>();
if (jsObject.IsEmpty())
return handleError(DataCloneError, next);
greyObject(jsObject);
if (value->IsDate())
m_writer.writeDate(value->NumberValue());
else if (value->IsStringObject())
writeStringObject(value);
else if (value->IsNumberObject())
writeNumberObject(value);
else if (value->IsBooleanObject())
writeBooleanObject(value);
else if (value->IsArray()) {
return startArrayState(value.As<v8::Array>(), next);
} else if (V8File::HasInstance(value, m_isolate, currentWorldType))
writeFile(value);
else if (V8Blob::HasInstance(value, m_isolate, currentWorldType))
writeBlob(value);
else if (V8DOMFileSystem::HasInstance(value, m_isolate, currentWorldType))
return writeDOMFileSystem(value, next);
else if (V8FileList::HasInstance(value, m_isolate, currentWorldType))
writeFileList(value);
else if (V8ImageData::HasInstance(value, m_isolate, currentWorldType))
writeImageData(value);
else if (value->IsRegExp())
writeRegExp(value);
else if (V8ArrayBuffer::HasInstance(value, m_isolate, currentWorldType))
return writeArrayBuffer(value, next);
else if (value->IsObject()) {
if (isHostObject(jsObject) || jsObject->IsCallable() || value->IsNativeError())
return handleError(DataCloneError, next);
return startObjectState(jsObject, next);
} else
return handleError(DataCloneError, next);
}
return 0;
}
// Interface used by Reader to create objects of composite types.
class CompositeCreator {
public:
virtual ~CompositeCreator() { }
virtual bool consumeTopOfStack(v8::Handle<v8::Value>*) = 0;
virtual uint32_t objectReferenceCount() = 0;
virtual void pushObjectReference(const v8::Handle<v8::Value>&) = 0;
virtual bool tryGetObjectFromObjectReference(uint32_t reference, v8::Handle<v8::Value>*) = 0;
virtual bool tryGetTransferredMessagePort(uint32_t index, v8::Handle<v8::Value>*) = 0;
virtual bool tryGetTransferredArrayBuffer(uint32_t index, v8::Handle<v8::Value>*) = 0;
virtual bool newSparseArray(uint32_t length) = 0;
virtual bool newDenseArray(uint32_t length) = 0;
virtual bool newObject() = 0;
virtual bool completeObject(uint32_t numProperties, v8::Handle<v8::Value>*) = 0;
virtual bool completeSparseArray(uint32_t numProperties, uint32_t length, v8::Handle<v8::Value>*) = 0;
virtual bool completeDenseArray(uint32_t numProperties, uint32_t length, v8::Handle<v8::Value>*) = 0;
};
// Reader is responsible for deserializing primitive types and
// restoring information about saved objects of composite types.
class Reader {
public:
Reader(const uint8_t* buffer, int length, v8::Isolate* isolate, const BlobDataHandleMap& blobDataHandles)
: m_buffer(buffer)
, m_length(length)
, m_position(0)
, m_version(0)
, m_isolate(isolate)
, m_blobDataHandles(blobDataHandles)
{
ASSERT(!(reinterpret_cast<size_t>(buffer) & 1));
ASSERT(length >= 0);
}
bool isEof() const { return m_position >= m_length; }
bool read(v8::Handle<v8::Value>* value, CompositeCreator& creator)
{
SerializationTag tag;
if (!readTag(&tag))
return false;
switch (tag) {
case ReferenceCountTag: {
if (m_version <= 0)
return false;
uint32_t referenceTableSize;
if (!doReadUint32(&referenceTableSize))
return false;
// If this test fails, then the serializer and deserializer disagree about the assignment
// of object reference IDs. On the deserialization side, this means there are too many or too few
// calls to pushObjectReference.
if (referenceTableSize != creator.objectReferenceCount())
return false;
return true;
}
case InvalidTag:
return false;
case PaddingTag:
return true;
case UndefinedTag:
*value = v8::Undefined(m_isolate);
break;
case NullTag:
*value = v8NullWithCheck(m_isolate);
break;
case TrueTag:
*value = v8BooleanWithCheck(true, m_isolate);
break;
case FalseTag:
*value = v8BooleanWithCheck(false, m_isolate);
break;
case TrueObjectTag:
*value = v8::BooleanObject::New(true);
creator.pushObjectReference(*value);
break;
case FalseObjectTag:
*value = v8::BooleanObject::New(false);
creator.pushObjectReference(*value);
break;
case StringTag:
if (!readString(value))
return false;
break;
case StringUCharTag:
if (!readUCharString(value))
return false;
break;
case StringObjectTag:
if (!readStringObject(value))
return false;
creator.pushObjectReference(*value);
break;
case Int32Tag:
if (!readInt32(value))
return false;
break;
case Uint32Tag:
if (!readUint32(value))
return false;
break;
case DateTag:
if (!readDate(value))
return false;
creator.pushObjectReference(*value);
break;
case NumberTag:
if (!readNumber(value))
return false;
break;
case NumberObjectTag:
if (!readNumberObject(value))
return false;
creator.pushObjectReference(*value);
break;
case BlobTag:
if (!readBlob(value))
return false;
creator.pushObjectReference(*value);
break;
case FileTag:
if (!readFile(value))
return false;
creator.pushObjectReference(*value);
break;
case DOMFileSystemTag:
if (!readDOMFileSystem(value))
return false;
creator.pushObjectReference(*value);
break;
case FileListTag:
if (!readFileList(value))
return false;
creator.pushObjectReference(*value);
break;
case ImageDataTag:
if (!readImageData(value))
return false;
creator.pushObjectReference(*value);
break;
case RegExpTag:
if (!readRegExp(value))
return false;
creator.pushObjectReference(*value);
break;
case ObjectTag: {
uint32_t numProperties;
if (!doReadUint32(&numProperties))
return false;
if (!creator.completeObject(numProperties, value))
return false;
break;
}
case SparseArrayTag: {
uint32_t numProperties;
uint32_t length;
if (!doReadUint32(&numProperties))
return false;
if (!doReadUint32(&length))
return false;
if (!creator.completeSparseArray(numProperties, length, value))
return false;
break;
}
case DenseArrayTag: {
uint32_t numProperties;
uint32_t length;
if (!doReadUint32(&numProperties))
return false;
if (!doReadUint32(&length))
return false;
if (!creator.completeDenseArray(numProperties, length, value))
return false;
break;
}
case ArrayBufferViewTag: {
if (m_version <= 0)
return false;
if (!readArrayBufferView(value, creator))
return false;
creator.pushObjectReference(*value);
break;
}
case ArrayBufferTag: {
if (m_version <= 0)
return false;
if (!readArrayBuffer(value))
return false;
creator.pushObjectReference(*value);
break;
}
case GenerateFreshObjectTag: {
if (m_version <= 0)
return false;
if (!creator.newObject())
return false;
return true;
}
case GenerateFreshSparseArrayTag: {
if (m_version <= 0)
return false;
uint32_t length;
if (!doReadUint32(&length))
return false;
if (!creator.newSparseArray(length))
return false;
return true;
}
case GenerateFreshDenseArrayTag: {
if (m_version <= 0)
return false;
uint32_t length;
if (!doReadUint32(&length))
return false;
if (!creator.newDenseArray(length))
return false;
return true;
}
case MessagePortTag: {
if (m_version <= 0)
return false;
uint32_t index;
if (!doReadUint32(&index))
return false;
if (!creator.tryGetTransferredMessagePort(index, value))
return false;
break;
}
case ArrayBufferTransferTag: {
if (m_version <= 0)
return false;
uint32_t index;
if (!doReadUint32(&index))
return false;
if (!creator.tryGetTransferredArrayBuffer(index, value))
return false;
break;
}
case ObjectReferenceTag: {
if (m_version <= 0)
return false;
uint32_t reference;
if (!doReadUint32(&reference))
return false;
if (!creator.tryGetObjectFromObjectReference(reference, value))
return false;
break;
}
default:
return false;
}
return !value->IsEmpty();
}
bool readVersion(uint32_t& version)
{
SerializationTag tag;
if (!readTag(&tag)) {
// This is a nullary buffer. We're still version 0.
version = 0;
return true;
}
if (tag != VersionTag) {
// Versions of the format past 0 start with the version tag.
version = 0;
// Put back the tag.
undoReadTag();
return true;
}
// Version-bearing messages are obligated to finish the version tag.
return doReadUint32(&version);
}
void setVersion(uint32_t version)
{
m_version = version;
}
v8::Isolate* getIsolate() { return m_isolate; }
private:
bool readTag(SerializationTag* tag)
{
if (m_position >= m_length)
return false;
*tag = static_cast<SerializationTag>(m_buffer[m_position++]);
return true;
}
void undoReadTag()
{
if (m_position > 0)
--m_position;
}
bool readArrayBufferViewSubTag(ArrayBufferViewSubTag* tag)
{
if (m_position >= m_length)
return false;
*tag = static_cast<ArrayBufferViewSubTag>(m_buffer[m_position++]);
return true;
}
bool readString(v8::Handle<v8::Value>* value)
{
uint32_t length;
if (!doReadUint32(&length))
return false;
if (m_position + length > m_length)
return false;
*value = v8::String::New(reinterpret_cast<const char*>(m_buffer + m_position), length);
m_position += length;
return true;
}
bool readUCharString(v8::Handle<v8::Value>* value)
{
uint32_t length;
if (!doReadUint32(&length) || (length & 1))
return false;
if (m_position + length > m_length)
return false;
ASSERT(!(m_position & 1));
*value = v8::String::New(reinterpret_cast<const uint16_t*>(m_buffer + m_position), length / sizeof(UChar));
m_position += length;
return true;
}
bool readStringObject(v8::Handle<v8::Value>* value)
{
v8::Handle<v8::Value> stringValue;
if (!readString(&stringValue) || !stringValue->IsString())
return false;
*value = v8::StringObject::New(stringValue.As<v8::String>());
return true;
}
bool readWebCoreString(String* string)
{
uint32_t length;
if (!doReadUint32(&length))
return false;
if (m_position + length > m_length)
return false;
*string = String::fromUTF8(reinterpret_cast<const char*>(m_buffer + m_position), length);
m_position += length;
return true;
}
bool readInt32(v8::Handle<v8::Value>* value)
{
uint32_t rawValue;
if (!doReadUint32(&rawValue))
return false;
*value = v8::Integer::New(static_cast<int32_t>(ZigZag::decode(rawValue)), m_isolate);
return true;
}
bool readUint32(v8::Handle<v8::Value>* value)
{
uint32_t rawValue;
if (!doReadUint32(&rawValue))
return false;
*value = v8::Integer::NewFromUnsigned(rawValue, m_isolate);
return true;
}
bool readDate(v8::Handle<v8::Value>* value)
{
double numberValue;
if (!doReadNumber(&numberValue))
return false;
*value = v8::Date::New(numberValue);
return true;
}
bool readNumber(v8::Handle<v8::Value>* value)
{
double number;
if (!doReadNumber(&number))
return false;
*value = v8::Number::New(m_isolate, number);
return true;
}
bool readNumberObject(v8::Handle<v8::Value>* value)
{
double number;
if (!doReadNumber(&number))
return false;
*value = v8::NumberObject::New(number);
return true;
}
bool readImageData(v8::Handle<v8::Value>* value)
{
uint32_t width;
uint32_t height;
uint32_t pixelDataLength;
if (!doReadUint32(&width))
return false;
if (!doReadUint32(&height))
return false;
if (!doReadUint32(&pixelDataLength))
return false;
if (m_position + pixelDataLength > m_length)
return false;
RefPtr<ImageData> imageData = ImageData::create(IntSize(width, height));
Uint8ClampedArray* pixelArray = imageData->data();
ASSERT(pixelArray);
ASSERT(pixelArray->length() >= pixelDataLength);
memcpy(pixelArray->data(), m_buffer + m_position, pixelDataLength);
m_position += pixelDataLength;
*value = toV8(imageData.release(), v8::Handle<v8::Object>(), m_isolate);
return true;
}
PassRefPtr<ArrayBuffer> doReadArrayBuffer()
{
uint32_t byteLength;
if (!doReadUint32(&byteLength))
return 0;
if (m_position + byteLength > m_length)
return 0;
const void* bufferStart = m_buffer + m_position;
RefPtr<ArrayBuffer> arrayBuffer = ArrayBuffer::create(bufferStart, byteLength);
arrayBuffer->setDeallocationObserver(V8ArrayBufferDeallocationObserver::instance());
m_position += byteLength;
return arrayBuffer.release();
}
bool readArrayBuffer(v8::Handle<v8::Value>* value)
{
RefPtr<ArrayBuffer> arrayBuffer = doReadArrayBuffer();
if (!arrayBuffer)
return false;
*value = toV8(arrayBuffer.release(), v8::Handle<v8::Object>(), m_isolate);
return true;
}
bool readArrayBufferView(v8::Handle<v8::Value>* value, CompositeCreator& creator)
{
ArrayBufferViewSubTag subTag;
uint32_t byteOffset;
uint32_t byteLength;
RefPtr<ArrayBuffer> arrayBuffer;
v8::Handle<v8::Value> arrayBufferV8Value;
if (!readArrayBufferViewSubTag(&subTag))
return false;
if (!doReadUint32(&byteOffset))
return false;
if (!doReadUint32(&byteLength))
return false;
if (!creator.consumeTopOfStack(&arrayBufferV8Value))
return false;
if (arrayBufferV8Value.IsEmpty())
return false;
arrayBuffer = V8ArrayBuffer::toNative(arrayBufferV8Value.As<v8::Object>());
if (!arrayBuffer)
return false;
switch (subTag) {
case ByteArrayTag:
*value = toV8(Int8Array::create(arrayBuffer.release(), byteOffset, byteLength), v8::Handle<v8::Object>(), m_isolate);
break;
case UnsignedByteArrayTag:
*value = toV8(Uint8Array::create(arrayBuffer.release(), byteOffset, byteLength), v8::Handle<v8::Object>(), m_isolate);
break;
case UnsignedByteClampedArrayTag:
*value = toV8(Uint8ClampedArray::create(arrayBuffer.release(), byteOffset, byteLength), v8::Handle<v8::Object>(), m_isolate);
break;
case ShortArrayTag: {
uint32_t shortLength = byteLength / sizeof(int16_t);
if (shortLength * sizeof(int16_t) != byteLength)
return false;
*value = toV8(Int16Array::create(arrayBuffer.release(), byteOffset, shortLength), v8::Handle<v8::Object>(), m_isolate);
break;
}
case UnsignedShortArrayTag: {
uint32_t shortLength = byteLength / sizeof(uint16_t);
if (shortLength * sizeof(uint16_t) != byteLength)
return false;
*value = toV8(Uint16Array::create(arrayBuffer.release(), byteOffset, shortLength), v8::Handle<v8::Object>(), m_isolate);
break;
}
case IntArrayTag: {
uint32_t intLength = byteLength / sizeof(int32_t);
if (intLength * sizeof(int32_t) != byteLength)
return false;
*value = toV8(Int32Array::create(arrayBuffer.release(), byteOffset, intLength), v8::Handle<v8::Object>(), m_isolate);
break;
}
case UnsignedIntArrayTag: {
uint32_t intLength = byteLength / sizeof(uint32_t);
if (intLength * sizeof(uint32_t) != byteLength)
return false;
*value = toV8(Uint32Array::create(arrayBuffer.release(), byteOffset, intLength), v8::Handle<v8::Object>(), m_isolate);
break;
}
case FloatArrayTag: {
uint32_t floatLength = byteLength / sizeof(float);
if (floatLength * sizeof(float) != byteLength)
return false;
*value = toV8(Float32Array::create(arrayBuffer.release(), byteOffset, floatLength), v8::Handle<v8::Object>(), m_isolate);
break;
}
case DoubleArrayTag: {
uint32_t floatLength = byteLength / sizeof(double);
if (floatLength * sizeof(double) != byteLength)
return false;
*value = toV8(Float64Array::create(arrayBuffer.release(), byteOffset, floatLength), v8::Handle<v8::Object>(), m_isolate);
break;
}
case DataViewTag:
*value = toV8(DataView::create(arrayBuffer.release(), byteOffset, byteLength), v8::Handle<v8::Object>(), m_isolate);
break;
default:
return false;
}
// The various *Array::create() methods will return null if the range the view expects is
// mismatched with the range the buffer can provide or if the byte offset is not aligned
// to the size of the element type.
return !value->IsEmpty();
}
bool readRegExp(v8::Handle<v8::Value>* value)
{
v8::Handle<v8::Value> pattern;
if (!readString(&pattern))
return false;
uint32_t flags;
if (!doReadUint32(&flags))
return false;
*value = v8::RegExp::New(pattern.As<v8::String>(), static_cast<v8::RegExp::Flags>(flags));
return true;
}
bool readBlob(v8::Handle<v8::Value>* value)
{
if (m_version < 3)
return false;
String uuid;
String type;
uint64_t size;
if (!readWebCoreString(&uuid))
return false;
if (!readWebCoreString(&type))
return false;
if (!doReadUint64(&size))
return false;
RefPtr<Blob> blob = Blob::create(getOrCreateBlobDataHandle(uuid, type, size));
*value = toV8(blob.release(), v8::Handle<v8::Object>(), m_isolate);
return true;
}
bool readDOMFileSystem(v8::Handle<v8::Value>* value)
{
uint32_t type;
String name;
String url;
if (!doReadUint32(&type))
return false;
if (!readWebCoreString(&name))
return false;
if (!readWebCoreString(&url))
return false;
RefPtr<DOMFileSystem> fs = DOMFileSystem::create(getExecutionContext(), name, static_cast<WebCore::FileSystemType>(type), KURL(ParsedURLString, url));
*value = toV8(fs.release(), v8::Handle<v8::Object>(), m_isolate);
return true;
}
bool readFile(v8::Handle<v8::Value>* value)
{
RefPtr<File> file = doReadFileHelper();
if (!file)
return false;
*value = toV8(file.release(), v8::Handle<v8::Object>(), m_isolate);
return true;
}
bool readFileList(v8::Handle<v8::Value>* value)
{
if (m_version < 3)
return false;
uint32_t length;
if (!doReadUint32(&length))
return false;
RefPtr<FileList> fileList = FileList::create();
for (unsigned i = 0; i < length; ++i) {
RefPtr<File> file = doReadFileHelper();
if (!file)
return false;
fileList->append(file.release());
}
*value = toV8(fileList.release(), v8::Handle<v8::Object>(), m_isolate);
return true;
}
PassRefPtr<File> doReadFileHelper()
{
if (m_version < 3)
return 0;
String path;
String uuid;
String type;
if (!readWebCoreString(&path))
return 0;
if (!readWebCoreString(&uuid))
return 0;
if (!readWebCoreString(&type))
return 0;
return File::create(path, getOrCreateBlobDataHandle(uuid, type));
}
template<class T>
bool doReadUintHelper(T* value)
{
*value = 0;
uint8_t currentByte;
int shift = 0;
do {
if (m_position >= m_length)
return false;
currentByte = m_buffer[m_position++];
*value |= ((currentByte & varIntMask) << shift);
shift += varIntShift;
} while (currentByte & (1 << varIntShift));
return true;
}
bool doReadUint32(uint32_t* value)
{
return doReadUintHelper(value);
}
bool doReadUint64(uint64_t* value)
{
return doReadUintHelper(value);
}
bool doReadNumber(double* number)
{
if (m_position + sizeof(double) > m_length)
return false;
uint8_t* numberAsByteArray = reinterpret_cast<uint8_t*>(number);
for (unsigned i = 0; i < sizeof(double); ++i)
numberAsByteArray[i] = m_buffer[m_position++];
return true;
}
PassRefPtr<BlobDataHandle> getOrCreateBlobDataHandle(const String& uuid, const String& type, long long size = -1)
{
// The containing ssv may have a BDH for this uuid if this ssv is just being
// passed from main to worker thread (for example). We use those values when creating
// the new blob instead of cons'ing up a new BDH.
//
// FIXME: Maybe we should require that it work that way where the ssv must have a BDH for any
// blobs it comes across during deserialization. Would require callers to explicitly populate
// the collection of BDH's for blobs to work, which would encourage lifetimes to be considered
// when passing ssv's around cross process. At present, we get 'lucky' in some cases because
// the blob in the src process happens to still exist at the time the dest process is deserializing.
// For example in sharedWorker.postMesssage(...).
BlobDataHandleMap::const_iterator it = m_blobDataHandles.find(uuid);
if (it != m_blobDataHandles.end()) {
// make assertions about type and size?
return it->value;
}
return BlobDataHandle::create(uuid, type, size);
}
const uint8_t* m_buffer;
const unsigned m_length;
unsigned m_position;
uint32_t m_version;
v8::Isolate* m_isolate;
const BlobDataHandleMap& m_blobDataHandles;
};
typedef Vector<WTF::ArrayBufferContents, 1> ArrayBufferContentsArray;
class Deserializer : public CompositeCreator {
public:
Deserializer(Reader& reader, MessagePortArray* messagePorts, ArrayBufferContentsArray* arrayBufferContents)
: m_reader(reader)
, m_transferredMessagePorts(messagePorts)
, m_arrayBufferContents(arrayBufferContents)
, m_arrayBuffers(arrayBufferContents ? arrayBufferContents->size() : 0)
, m_version(0)
{
}
v8::Handle<v8::Value> deserialize()
{
if (!m_reader.readVersion(m_version) || m_version > SerializedScriptValue::wireFormatVersion)
return v8NullWithCheck(m_reader.getIsolate());
m_reader.setVersion(m_version);
v8::HandleScope scope(m_reader.getIsolate());
while (!m_reader.isEof()) {
if (!doDeserialize())
return v8NullWithCheck(m_reader.getIsolate());
}
if (stackDepth() != 1 || m_openCompositeReferenceStack.size())
return v8NullWithCheck(m_reader.getIsolate());
v8::Handle<v8::Value> result = scope.Close(element(0));
return result;
}
virtual bool newSparseArray(uint32_t)
{
v8::Local<v8::Array> array = v8::Array::New(0);
openComposite(array);
return true;
}
virtual bool newDenseArray(uint32_t length)
{
v8::Local<v8::Array> array = v8::Array::New(length);
openComposite(array);
return true;
}
virtual bool consumeTopOfStack(v8::Handle<v8::Value>* object)
{
if (stackDepth() < 1)
return false;
*object = element(stackDepth() - 1);
pop(1);
return true;
}
virtual bool completeArray(uint32_t length, v8::Handle<v8::Value>* value)
{
if (length > stackDepth())
return false;
v8::Local<v8::Array> array;
if (m_version > 0) {
v8::Local<v8::Value> composite;
if (!closeComposite(&composite))
return false;
array = composite.As<v8::Array>();
} else
array = v8::Array::New(length);
if (array.IsEmpty())
return false;
const int depth = stackDepth() - length;
// The V8 API ensures space exists for any index argument to Set; it will (eg) resize arrays as necessary.
for (unsigned i = 0; i < length; ++i)
array->Set(i, element(depth + i));
pop(length);
*value = array;
return true;
}
virtual bool newObject()
{
v8::Local<v8::Object> object = v8::Object::New();
if (object.IsEmpty())
return false;
openComposite(object);
return true;
}
virtual bool completeObject(uint32_t numProperties, v8::Handle<v8::Value>* value)
{
v8::Local<v8::Object> object;
if (m_version > 0) {
v8::Local<v8::Value> composite;
if (!closeComposite(&composite))
return false;
object = composite.As<v8::Object>();
} else
object = v8::Object::New();
if (object.IsEmpty())
return false;
return initializeObject(object, numProperties, value);
}
virtual bool completeSparseArray(uint32_t numProperties, uint32_t length, v8::Handle<v8::Value>* value)
{
v8::Local<v8::Array> array;
if (m_version > 0) {
v8::Local<v8::Value> composite;
if (!closeComposite(&composite))
return false;
array = composite.As<v8::Array>();
} else
array = v8::Array::New();
if (array.IsEmpty())
return false;
return initializeObject(array, numProperties, value);
}
virtual bool completeDenseArray(uint32_t numProperties, uint32_t length, v8::Handle<v8::Value>* value)
{
v8::Local<v8::Array> array;
if (m_version > 0) {
v8::Local<v8::Value> composite;
if (!closeComposite(&composite))
return false;
array = composite.As<v8::Array>();
}
if (array.IsEmpty())
return false;
if (!initializeObject(array, numProperties, value))
return false;
if (length > stackDepth())
return false;
for (unsigned i = 0, stackPos = stackDepth() - length; i < length; i++, stackPos++) {
v8::Local<v8::Value> elem = element(stackPos);
if (!elem->IsUndefined())
array->Set(i, elem);
}
pop(length);
return true;
}
virtual void pushObjectReference(const v8::Handle<v8::Value>& object)
{
m_objectPool.append(object);
}
virtual bool tryGetTransferredMessagePort(uint32_t index, v8::Handle<v8::Value>* object)
{
if (!m_transferredMessagePorts)
return false;
if (index >= m_transferredMessagePorts->size())
return false;
*object = toV8(m_transferredMessagePorts->at(index).get(), v8::Handle<v8::Object>(), m_reader.getIsolate());
return true;
}
virtual bool tryGetTransferredArrayBuffer(uint32_t index, v8::Handle<v8::Value>* object)
{
if (!m_arrayBufferContents)
return false;
if (index >= m_arrayBuffers.size())
return false;
v8::Handle<v8::Object> result = m_arrayBuffers.at(index);
if (result.IsEmpty()) {
RefPtr<ArrayBuffer> buffer = ArrayBuffer::create(m_arrayBufferContents->at(index));
buffer->setDeallocationObserver(V8ArrayBufferDeallocationObserver::instance());
v8::V8::AdjustAmountOfExternalAllocatedMemory(buffer->byteLength());
result = toV8Object(buffer.get(), m_reader.getIsolate());
m_arrayBuffers[index] = result;
}
*object = result;
return true;
}
virtual bool tryGetObjectFromObjectReference(uint32_t reference, v8::Handle<v8::Value>* object)
{
if (reference >= m_objectPool.size())
return false;
*object = m_objectPool[reference];
return object;
}
virtual uint32_t objectReferenceCount()
{
return m_objectPool.size();
}
private:
bool initializeObject(v8::Handle<v8::Object> object, uint32_t numProperties, v8::Handle<v8::Value>* value)
{
unsigned length = 2 * numProperties;
if (length > stackDepth())
return false;
for (unsigned i = stackDepth() - length; i < stackDepth(); i += 2) {
v8::Local<v8::Value> propertyName = element(i);
v8::Local<v8::Value> propertyValue = element(i + 1);
object->Set(propertyName, propertyValue);
}
pop(length);
*value = object;
return true;
}
bool doDeserialize()
{
v8::Local<v8::Value> value;
if (!m_reader.read(&value, *this))
return false;
if (!value.IsEmpty())
push(value);
return true;
}
void push(v8::Local<v8::Value> value) { m_stack.append(value); }
void pop(unsigned length)
{
ASSERT(length <= m_stack.size());
m_stack.shrink(m_stack.size() - length);
}
unsigned stackDepth() const { return m_stack.size(); }
v8::Local<v8::Value> element(unsigned index)
{
ASSERT_WITH_SECURITY_IMPLICATION(index < m_stack.size());
return m_stack[index];
}
void openComposite(const v8::Local<v8::Value>& object)
{
uint32_t newObjectReference = m_objectPool.size();
m_openCompositeReferenceStack.append(newObjectReference);
m_objectPool.append(object);
}
bool closeComposite(v8::Handle<v8::Value>* object)
{
if (!m_openCompositeReferenceStack.size())
return false;
uint32_t objectReference = m_openCompositeReferenceStack[m_openCompositeReferenceStack.size() - 1];
m_openCompositeReferenceStack.shrink(m_openCompositeReferenceStack.size() - 1);
if (objectReference >= m_objectPool.size())
return false;
*object = m_objectPool[objectReference];
return true;
}
Reader& m_reader;
Vector<v8::Local<v8::Value> > m_stack;
Vector<v8::Handle<v8::Value> > m_objectPool;
Vector<uint32_t> m_openCompositeReferenceStack;
MessagePortArray* m_transferredMessagePorts;
ArrayBufferContentsArray* m_arrayBufferContents;
Vector<v8::Handle<v8::Object> > m_arrayBuffers;
uint32_t m_version;
};
} // namespace
PassRefPtr<SerializedScriptValue> SerializedScriptValue::create(v8::Handle<v8::Value> value, MessagePortArray* messagePorts, ArrayBufferArray* arrayBuffers, bool& didThrow, v8::Isolate* isolate)
{
return adoptRef(new SerializedScriptValue(value, messagePorts, arrayBuffers, didThrow, isolate));
}
PassRefPtr<SerializedScriptValue> SerializedScriptValue::create(v8::Handle<v8::Value> value, v8::Isolate* isolate)
{
bool didThrow;
return adoptRef(new SerializedScriptValue(value, 0, 0, didThrow, isolate));
}
PassRefPtr<SerializedScriptValue> SerializedScriptValue::createAndSwallowExceptions(v8::Handle<v8::Value> value, v8::Isolate* isolate)
{
bool didThrow;
return adoptRef(new SerializedScriptValue(value, 0, 0, didThrow, isolate, DoNotThrowExceptions));
}
PassRefPtr<SerializedScriptValue> SerializedScriptValue::createFromWire(const String& data)
{
return adoptRef(new SerializedScriptValue(data));
}
PassRefPtr<SerializedScriptValue> SerializedScriptValue::createFromWireBytes(const Vector<uint8_t>& data)
{
// Decode wire data from big endian to host byte order.
ASSERT(!(data.size() % sizeof(UChar)));
size_t length = data.size() / sizeof(UChar);
StringBuffer<UChar> buffer(length);
const UChar* src = reinterpret_cast<const UChar*>(data.data());
UChar* dst = buffer.characters();
for (size_t i = 0; i < length; i++)
dst[i] = ntohs(src[i]);
return createFromWire(String::adopt(buffer));
}
PassRefPtr<SerializedScriptValue> SerializedScriptValue::create(const String& data)
{
return create(data, v8::Isolate::GetCurrent());
}
PassRefPtr<SerializedScriptValue> SerializedScriptValue::create(const String& data, v8::Isolate* isolate)
{
Writer writer(isolate);
writer.writeWebCoreString(data);
String wireData = writer.takeWireString();
return adoptRef(new SerializedScriptValue(wireData));
}
PassRefPtr<SerializedScriptValue> SerializedScriptValue::create()
{
return adoptRef(new SerializedScriptValue());
}
PassRefPtr<SerializedScriptValue> SerializedScriptValue::nullValue()
{
return nullValue(v8::Isolate::GetCurrent());
}
PassRefPtr<SerializedScriptValue> SerializedScriptValue::nullValue(v8::Isolate* isolate)
{
Writer writer(isolate);
writer.writeNull();
String wireData = writer.takeWireString();
return adoptRef(new SerializedScriptValue(wireData));
}
PassRefPtr<SerializedScriptValue> SerializedScriptValue::undefinedValue()
{
return undefinedValue(v8::Isolate::GetCurrent());
}
PassRefPtr<SerializedScriptValue> SerializedScriptValue::undefinedValue(v8::Isolate* isolate)
{
Writer writer(isolate);
writer.writeUndefined();
String wireData = writer.takeWireString();
return adoptRef(new SerializedScriptValue(wireData));
}
PassRefPtr<SerializedScriptValue> SerializedScriptValue::booleanValue(bool value)
{
return booleanValue(value, v8::Isolate::GetCurrent());
}
PassRefPtr<SerializedScriptValue> SerializedScriptValue::booleanValue(bool value, v8::Isolate* isolate)
{
Writer writer(isolate);
if (value)
writer.writeTrue();
else
writer.writeFalse();
String wireData = writer.takeWireString();
return adoptRef(new SerializedScriptValue(wireData));
}
PassRefPtr<SerializedScriptValue> SerializedScriptValue::numberValue(double value)
{
return numberValue(value, v8::Isolate::GetCurrent());
}
PassRefPtr<SerializedScriptValue> SerializedScriptValue::numberValue(double value, v8::Isolate* isolate)
{
Writer writer(isolate);
writer.writeNumber(value);
String wireData = writer.takeWireString();
return adoptRef(new SerializedScriptValue(wireData));
}
// Convert serialized string to big endian wire data.
void SerializedScriptValue::toWireBytes(Vector<char>& result) const
{
ASSERT(result.isEmpty());
size_t length = m_data.length();
result.resize(length * sizeof(UChar));
UChar* dst = reinterpret_cast<UChar*>(result.data());
if (m_data.is8Bit()) {
const LChar* src = m_data.characters8();
for (size_t i = 0; i < length; i++)
dst[i] = htons(static_cast<UChar>(src[i]));
} else {
const UChar* src = m_data.characters16();
for (size_t i = 0; i < length; i++)
dst[i] = htons(src[i]);
}
}
PassRefPtr<SerializedScriptValue> SerializedScriptValue::release()
{
RefPtr<SerializedScriptValue> result = adoptRef(new SerializedScriptValue(m_data));
m_data = String();
return result.release();
}
SerializedScriptValue::SerializedScriptValue()
: m_externallyAllocatedMemory(0)
{
}
inline void neuterBinding(ArrayBuffer* object)
{
v8::Isolate* isolate = v8::Isolate::GetCurrent();
Vector<DOMDataStore*>& allStores = V8PerIsolateData::from(isolate)->allStores();
for (size_t i = 0; i < allStores.size(); i++) {
v8::Handle<v8::Object> wrapper = allStores[i]->get<V8ArrayBuffer>(object, isolate);
if (!wrapper.IsEmpty()) {
ASSERT(wrapper->IsArrayBuffer());
v8::Handle<v8::ArrayBuffer>::Cast(wrapper)->Neuter();
}
}
}
inline void neuterBinding(ArrayBufferView* object)
{
v8::Isolate* isolate = v8::Isolate::GetCurrent();
Vector<DOMDataStore*>& allStores = V8PerIsolateData::from(isolate)->allStores();
for (size_t i = 0; i < allStores.size(); i++) {
v8::Handle<v8::Object> wrapper = allStores[i]->get<V8ArrayBufferView>(object, isolate);
if (!wrapper.IsEmpty())
wrapper->SetIndexedPropertiesToExternalArrayData(0, v8::kExternalByteArray, 0);
}
}
PassOwnPtr<SerializedScriptValue::ArrayBufferContentsArray> SerializedScriptValue::transferArrayBuffers(ArrayBufferArray& arrayBuffers, bool& didThrow, v8::Isolate* isolate)
{
ASSERT(arrayBuffers.size());
for (size_t i = 0; i < arrayBuffers.size(); i++) {
if (arrayBuffers[i]->isNeutered()) {
setDOMException(InvalidStateError, isolate);
didThrow = true;
return nullptr;
}
}
OwnPtr<ArrayBufferContentsArray> contents = adoptPtr(new ArrayBufferContentsArray(arrayBuffers.size()));
HashSet<ArrayBuffer*> visited;
for (size_t i = 0; i < arrayBuffers.size(); i++) {
Vector<RefPtr<ArrayBufferView> > neuteredViews;
if (visited.contains(arrayBuffers[i].get()))
continue;
visited.add(arrayBuffers[i].get());
bool result = arrayBuffers[i]->transfer(contents->at(i), neuteredViews);
if (!result) {
setDOMException(InvalidStateError, isolate);
didThrow = true;
return nullptr;
}
neuterBinding(arrayBuffers[i].get());
for (size_t j = 0; j < neuteredViews.size(); j++)
neuterBinding(neuteredViews[j].get());
}
return contents.release();
}
SerializedScriptValue::SerializedScriptValue(v8::Handle<v8::Value> value, MessagePortArray* messagePorts, ArrayBufferArray* arrayBuffers, bool& didThrow, v8::Isolate* isolate, ExceptionPolicy policy)
: m_externallyAllocatedMemory(0)
{
didThrow = false;
Writer writer(isolate);
Serializer::Status status;
{
v8::TryCatch tryCatch;
Serializer serializer(writer, messagePorts, arrayBuffers, m_blobDataHandles, tryCatch, isolate);
status = serializer.serialize(value);
if (status == Serializer::JSException) {
didThrow = true;
// If there was a JS exception thrown, re-throw it.
if (policy == ThrowExceptions)
tryCatch.ReThrow();
return;
}
}
switch (status) {
case Serializer::InputError:
case Serializer::DataCloneError:
// If there was an input error, throw a new exception outside
// of the TryCatch scope.
didThrow = true;
if (policy == ThrowExceptions)
setDOMException(DataCloneError, isolate);
return;
case Serializer::InvalidStateError:
didThrow = true;
if (policy == ThrowExceptions)
setDOMException(InvalidStateError, isolate);
return;
case Serializer::JSFailure:
// If there was a JS failure (but no exception), there's not
// much we can do except for unwinding the C++ stack by
// pretending there was a JS exception.
didThrow = true;
return;
case Serializer::Success:
m_data = writer.takeWireString();
ASSERT(m_data.impl()->hasOneRef());
if (arrayBuffers && arrayBuffers->size())
m_arrayBufferContentsArray = transferArrayBuffers(*arrayBuffers, didThrow, isolate);
return;
case Serializer::JSException:
// We should never get here because this case was handled above.
break;
}
ASSERT_NOT_REACHED();
}
SerializedScriptValue::SerializedScriptValue(const String& wireData)
: m_externallyAllocatedMemory(0)
{
m_data = wireData.isolatedCopy();
}
v8::Handle<v8::Value> SerializedScriptValue::deserialize(MessagePortArray* messagePorts)
{
return deserialize(v8::Isolate::GetCurrent(), messagePorts);
}