Sharing of SharedArrayBuffer via PostMessage transfer

Source/bindings/core/v8/ScriptValueSerializer.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ScriptValueSerializer_h
 #define ScriptValueSerializer_h
 
 #include "bindings/core/v8/SerializationTag.h"
 #include "bindings/core/v8/SerializedScriptValue.h"
 #include "bindings/core/v8/V8Binding.h"
 #include "core/CoreExport.h"
 #include "wtf/ArrayBufferContents.h"
 #include "wtf/HashMap.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/Vector.h"
 #include "wtf/text/WTFString.h"
 #include <v8.h>
 
 namespace blink {
 
 class CompositorProxy;
 class DOMArrayBuffer;
 class DOMArrayBufferView;
+class DOMSharedArrayBuffer;
 class File;
 class FileList;
 
 typedef Vector<WTF::ArrayBufferContents, 1> ArrayBufferContentsArray;
 
 // 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;
@@ skipping 93 matching lines @@
     void writeFile(const File&);
     void writeFileIndex(int blobIndex);
     void writeFileList(const FileList&);
     void writeFileListIndex(const Vector<int>& blobIndices);
     void writeArrayBuffer(const DOMArrayBuffer&);
     void writeArrayBufferView(const DOMArrayBufferView&);
     void writeImageData(uint32_t width, uint32_t height, const uint8_t* pixelData, uint32_t pixelDataLength);
     void writeRegExp(v8::Local<v8::String> pattern, v8::RegExp::Flags);
     void writeTransferredMessagePort(uint32_t index);
     void writeTransferredArrayBuffer(uint32_t index);
+    void writeTransferredSharedArrayBuffer(uint32_t index);
     void writeObjectReference(uint32_t reference);
     void writeObject(uint32_t numProperties);
     void writeSparseArray(uint32_t numProperties, uint32_t length);
     void writeDenseArray(uint32_t numProperties, uint32_t length);
     String takeWireString();
     void writeReferenceCount(uint32_t numberOfReferences);
     void writeGenerateFreshObject();
     void writeGenerateFreshSparseArray(uint32_t length);
     void writeGenerateFreshDenseArray(uint32_t length);
 
@@ skipping 40 matching lines @@
 protected:
     class StateBase;
 public:
     enum Status {
         Success,
         InputError,
         DataCloneError,
         JSException
     };
 
-    ScriptValueSerializer(SerializedScriptValueWriter&, MessagePortArray* messagePorts, ArrayBufferArray* arrayBuffers, WebBlobInfoArray*, BlobDataHandleMap& blobDataHandles, v8::TryCatch&, ScriptState*);
+    ScriptValueSerializer(SerializedScriptValueWriter&, MessagePortArray* messagePorts, ArrayBufferArray* arrayBuffers, SharedArrayBufferArray* sharedArrayBuffers, WebBlobInfoArray*, BlobDataHandleMap& blobDataHandles, v8::TryCatch&, ScriptState*);
     v8::Isolate* isolate() { return m_scriptState->isolate(); }
     v8::Local<v8::Context> context() { return m_scriptState->context(); }
 
     Status serialize(v8::Local<v8::Value>);
     String errorMessage() { return m_errorMessage; }
 
 protected:
     class StateBase {
         WTF_MAKE_NONCOPYABLE(StateBase);
     public:
@@ skipping 153 matching lines @@
     void writeBooleanObject(v8::Local<v8::Value>);
     StateBase* writeBlob(v8::Local<v8::Value>, StateBase* next);
     StateBase* writeCompositorProxy(v8::Local<v8::Value>, StateBase* next);
     StateBase* writeFile(v8::Local<v8::Value>, StateBase* next);
     StateBase* writeFileList(v8::Local<v8::Value>, StateBase* next);
     void writeImageData(v8::Local<v8::Value>);
     void writeRegExp(v8::Local<v8::Value>);
     StateBase* writeAndGreyArrayBufferView(v8::Local<v8::Object>, StateBase* next);
     StateBase* writeArrayBuffer(v8::Local<v8::Value>, StateBase* next);
     StateBase* writeTransferredArrayBuffer(v8::Local<v8::Value>, uint32_t index, StateBase* next);
+    StateBase* writeTransferredSharedArrayBuffer(v8::Local<v8::Value>, uint32_t index, StateBase* next);
     static bool shouldSerializeDensely(uint32_t length, uint32_t propertyCount);
 
     StateBase* startArrayState(v8::Local<v8::Array>, StateBase* next);
     StateBase* startObjectState(v8::Local<v8::Object>, StateBase* next);
 
     bool appendBlobInfo(const String& uuid, const String& type, unsigned long long size, int* index);
     bool appendFileInfo(const File*, int* index);
 
 protected:
     // 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::Local<v8::Object>&);
 
     StateBase* handleError(Status errorStatus, const String& message, StateBase*);
 
     SerializedScriptValueWriter& writer() { return m_writer; }
     uint32_t nextObjectReference() const { return m_nextObjectReference; }
 
 private:
     RefPtr<ScriptState> m_scriptState;
     SerializedScriptValueWriter& m_writer;
     v8::TryCatch& m_tryCatch;
     int m_depth;
     Status m_status;
     String m_errorMessage;
     typedef V8ObjectMap<v8::Object, uint32_t> ObjectPool;
     ObjectPool m_objectPool;
     ObjectPool m_transferredMessagePorts;
     ObjectPool m_transferredArrayBuffers;
+    ObjectPool m_transferredSharedArrayBuffers;
     uint32_t m_nextObjectReference;
     WebBlobInfoArray* m_blobInfo;
     BlobDataHandleMap& m_blobDataHandles;
 };
 
 // Interface used by SerializedScriptValueReader to create objects of composite types.
 class CORE_EXPORT ScriptValueCompositeCreator {
     STACK_ALLOCATED();
     WTF_MAKE_NONCOPYABLE(ScriptValueCompositeCreator);
 public:
     ScriptValueCompositeCreator() { }
     virtual ~ScriptValueCompositeCreator() { }
 
     virtual bool consumeTopOfStack(v8::Local<v8::Value>*) = 0;
     virtual uint32_t objectReferenceCount() = 0;
     virtual void pushObjectReference(const v8::Local<v8::Value>&) = 0;
     virtual bool tryGetObjectFromObjectReference(uint32_t reference, v8::Local<v8::Value>*) = 0;
     virtual bool tryGetTransferredMessagePort(uint32_t index, v8::Local<v8::Value>*) = 0;
     virtual bool tryGetTransferredArrayBuffer(uint32_t index, v8::Local<v8::Value>*) = 0;
+    virtual bool tryGetTransferredSharedArrayBuffer(uint32_t index, v8::Local<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::Local<v8::Value>*) = 0;
     virtual bool completeSparseArray(uint32_t numProperties, uint32_t length, v8::Local<v8::Value>*) = 0;
     virtual bool completeDenseArray(uint32_t numProperties, uint32_t length, v8::Local<v8::Value>*) = 0;
 };
 
 // SerializedScriptValueReader is responsible for deserializing primitive types and
 // restoring information about saved objects of composite types.
@@ skipping 114 matching lines @@
     virtual bool newSparseArray(uint32_t) override;
     virtual bool newDenseArray(uint32_t length) override;
     virtual bool consumeTopOfStack(v8::Local<v8::Value>*) override;
     virtual bool newObject() override;
     virtual bool completeObject(uint32_t numProperties, v8::Local<v8::Value>*) override;
     virtual bool completeSparseArray(uint32_t numProperties, uint32_t length, v8::Local<v8::Value>*) override;
     virtual bool completeDenseArray(uint32_t numProperties, uint32_t length, v8::Local<v8::Value>*) override;
     virtual void pushObjectReference(const v8::Local<v8::Value>&) override;
     virtual bool tryGetTransferredMessagePort(uint32_t index, v8::Local<v8::Value>*) override;
     virtual bool tryGetTransferredArrayBuffer(uint32_t index, v8::Local<v8::Value>*) override;
+    virtual bool tryGetTransferredSharedArrayBuffer(uint32_t index, v8::Local<v8::Value>*) override;
     virtual bool tryGetObjectFromObjectReference(uint32_t reference, v8::Local<v8::Value>*) override;
     virtual uint32_t objectReferenceCount() override;
 
 protected:
     SerializedScriptValueReader& reader() { return m_reader; }
     virtual bool read(v8::Local<v8::Value>*);
 
 private:
     bool initializeObject(v8::Local<v8::Object>, uint32_t numProperties, v8::Local<v8::Value>*);
     bool doDeserialize();
@@ skipping 15 matching lines @@
     Vector<uint32_t> m_openCompositeReferenceStack;
     MessagePortArray* m_transferredMessagePorts;
     ArrayBufferContentsArray* m_arrayBufferContents;
     Vector<v8::Local<v8::Value>> m_arrayBuffers;
     uint32_t m_version;
 };
 
 } // namespace blink
 
 #endif // ScriptValueSerializer_h