[SharedArrayBuffer] Prevent SharedArrayBuffer being used in Web APIs

third_party/WebKit/Source/core/html/ImageData.h

 /*
  * Copyright (C) 2008, 2009 Apple 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 15 matching lines @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef ImageData_h
 #define ImageData_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/CoreExport.h"
 #include "core/dom/DOMArrayBufferView.h"
 #include "core/dom/DOMTypedArray.h"
+#include "core/dom/MaybeShared.h"
 #include "core/imagebitmap/ImageBitmapSource.h"
 #include "platform/geometry/IntRect.h"
 #include "platform/geometry/IntSize.h"
 #include "platform/heap/Handle.h"
 #include "third_party/skia/include/core/SkColorSpace.h"
 #include "wtf/CheckedNumeric.h"
 #include "wtf/Compiler.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
@@ skipping 24 matching lines @@
 const char* const kSRGBImageDataColorSpaceName = "srgb";
 const char* const kLegacyImageDataColorSpaceName = "legacy-srgb";
 
 class CORE_EXPORT ImageData final : public GarbageCollectedFinalized<ImageData>,
                                     public ScriptWrappable,
                                     public ImageBitmapSource {
   DEFINE_WRAPPERTYPEINFO();
 
  public:
   static ImageData* create(const IntSize&);
-  static ImageData* create(const IntSize&, DOMUint8ClampedArray*);
   static ImageData* create(const IntSize&,
-                           DOMUint8ClampedArray*,
+                           const MaybeShared<DOMUint8ClampedArray>&);
+  static ImageData* create(const IntSize&,
+                           const MaybeShared<DOMUint8ClampedArray>&,
                            const String&);
   static ImageData* create(unsigned width, unsigned height, ExceptionState&);
-  static ImageData* create(DOMUint8ClampedArray*,
+  static ImageData* create(const MaybeShared<DOMUint8ClampedArray>&,
                            unsigned width,
                            ExceptionState&);
-  static ImageData* create(DOMUint8ClampedArray*,
+  static ImageData* create(const MaybeShared<DOMUint8ClampedArray>&,
                            unsigned width,
                            unsigned height,
                            ExceptionState&);
 
   static ImageData* createForTest(const IntSize&);
 
   ImageData* createImageData(unsigned width,
                              unsigned height,
                              String colorSpace,
                              ExceptionState&);
-  ImageData* createImageData(DOMUint8ClampedArray*,
+  ImageData* createImageData(const MaybeShared<DOMUint8ClampedArray>&,
                              unsigned width,
                              String colorSpace,
                              ExceptionState&);
-  ImageData* createImageData(DOMUint8ClampedArray*,
+  ImageData* createImageData(const MaybeShared<DOMUint8ClampedArray>&,
                              unsigned width,
                              unsigned height,
                              String colorSpace,
                              ExceptionState&);
 
   static ImageDataColorSpace getImageDataColorSpace(String);
   static String getImageDataColorSpaceName(ImageDataColorSpace);
   static sk_sp<SkColorSpace> imageDataColorSpaceToSkColorSpace(
       ImageDataColorSpace);
 
@@ skipping 25 matching lines @@
   static bool validateConstructorArguments(
       const unsigned&,
       const IntSize* = nullptr,
       const unsigned& = 0,
       const unsigned& = 0,
       const DOMArrayBufferView* = nullptr,
       const String* = nullptr,
       ExceptionState* = nullptr,
       ImageDataType = kUint8ClampedImageData);
 
+  template <typename T>
+  static bool validateDataArgumentIsNotShared(const MaybeShared<T>& maybeShared,
+                                              ExceptionState* exceptionState) {
+    if (maybeShared.isShared()) {
+      if (exceptionState) {
+        exceptionState->throwTypeError(
+            "The data is backed by a SharedArrayBuffer.");
+      }
+      return false;
+    }
+    return true;
+  }
+
  private:
   ImageData(const IntSize&,
             DOMUint8ClampedArray*,
             String = kLegacyImageDataColorSpaceName);
 
   IntSize m_size;
   ImageDataColorSpace m_colorSpace;
   Member<DOMUint8ClampedArray> m_data;
 
   static DOMUint8ClampedArray* allocateAndValidateUint8ClampedArray(
       const unsigned&,
       ExceptionState* = nullptr);
 };
 
 }  // namespace blink
 
 #endif  // ImageData_h