Wrap JSFunction bindings in a helper object

src/objects-inl.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // Review notes:
 //
 // - The use of macros in these inline functions may seem superfluous
 // but it is absolutely needed to make sure gcc generates optimal
 // code. gcc is not happy when attempting to inline too deep.
 //
@@ skipping 713 matching lines @@
 
 bool Object::IsTransitionArray() const {
   return IsFixedArray();
 }
 
 
 bool Object::IsTypeFeedbackVector() const { return IsFixedArray(); }
 
 
 bool Object::IsLiteralsArray() const { return IsFixedArray(); }
+bool Object::IsBindingsArray() const { return IsFixedArray(); }
 
 
 bool Object::IsDeoptimizationInputData() const {
   // Must be a fixed array.
   if (!IsFixedArray()) return false;
 
   // There's no sure way to detect the difference between a fixed array and
   // a deoptimization data array.  Since this is used for asserts we can
   // check that the length is zero or else the fixed size plus a multiple of
   // the entry size.
@@ skipping 2755 matching lines @@
 void LiteralsArray::set_literal(int literal_index, Object* literal) {
   set(kFirstLiteralIndex + literal_index, literal);
 }
 
 
 int LiteralsArray::literals_count() const {
   return length() - kFirstLiteralIndex;
 }
 
 
+Object* BindingsArray::get(int index) const { return FixedArray::get(index); }
+
+
+void BindingsArray::set(int index, Object* value) {
+  FixedArray::set(index, value);
+}
+
+
+void BindingsArray::set(int index, Smi* value) {
+  FixedArray::set(index, value);
+}
+
+
+void BindingsArray::set(int index, Object* value, WriteBarrierMode mode) {
+  FixedArray::set(index, value, mode);
+}
+
+
+int BindingsArray::length() const { return FixedArray::length(); }
+
+
+BindingsArray* BindingsArray::cast(Object* object) {
+  SLOW_DCHECK(object->IsBindingsArray());
+  return reinterpret_cast<BindingsArray*>(object);
+}
+
+void BindingsArray::set_feedback_vector(TypeFeedbackVector* vector) {
+  set(kVectorIndex, vector);
+}
+
+
+TypeFeedbackVector* BindingsArray::feedback_vector() const {
+  return TypeFeedbackVector::cast(get(kVectorIndex));
+}
+
+
+JSReceiver* BindingsArray::bound_function() const {
+  return JSReceiver::cast(get(kBoundFunctionIndex));
+}
+
+
+void BindingsArray::set_bound_function(JSReceiver* function) {
+  set(kBoundFunctionIndex, function);
+}
+
+
+Object* BindingsArray::bound_this() const { return get(kBoundThisIndex); }
+
+
+void BindingsArray::set_bound_this(Object* bound_this) {
+  set(kBoundThisIndex, bound_this);
+}
+
+
+Object* BindingsArray::binding(int binding_index) const {
+  return get(kFirstBindingIndex + binding_index);
+}
+
+
+void BindingsArray::set_binding(int binding_index, Object* binding) {
+  set(kFirstBindingIndex + binding_index, binding);
+}
+
+
+int BindingsArray::bindings_count() const {
+  return length() - kFirstBindingIndex;
+}
+
+
 void HandlerTable::SetRangeStart(int index, int value) {
   set(index * kRangeEntrySize + kRangeStartIndex, Smi::FromInt(value));
 }
 
 
 void HandlerTable::SetRangeEnd(int index, int value) {
   set(index * kRangeEntrySize + kRangeEndIndex, Smi::FromInt(value));
 }
 
 
@@ skipping 2796 matching lines @@
   return LiteralsArray::cast(literals_or_bindings());
 }
 
 
 void JSFunction::set_literals(LiteralsArray* literals) {
   DCHECK(!shared()->bound());
   set_literals_or_bindings(literals);
 }
 
 
-FixedArray* JSFunction::function_bindings() {
+BindingsArray* JSFunction::function_bindings() {
   DCHECK(shared()->bound());
-  return literals_or_bindings();
+  return BindingsArray::cast(literals_or_bindings());
 }
 
 
-void JSFunction::set_function_bindings(FixedArray* bindings) {
+void JSFunction::set_function_bindings(BindingsArray* bindings) {
   DCHECK(shared()->bound());
   // Bound function literal may be initialized to the empty fixed array
   // before the bindings are set.
   DCHECK(bindings == GetHeap()->empty_fixed_array() ||
          bindings->map() == GetHeap()->fixed_array_map());
   set_literals_or_bindings(bindings);
 }
 
 
 int JSFunction::NumberOfLiterals() {
@@ skipping 1700 matching lines @@
 #undef READ_INT64_FIELD
 #undef WRITE_INT64_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_