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// Copyright 2016 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. #ifndef V8_BUILTINS_BUILTINS_CONSTRUCTOR_H_ #define V8_BUILTINS_BUILTINS_CONSTRUCTOR_H_ #include "src/objects/contexts.h" #include "src/objects/dictionary.h" #include "src/objects/js-array.h" #include "src/objects/objects.h" namespace v8 { namespace internal { class ConstructorBuiltins { public: static int MaximumFunctionContextSlots() { return FLAG_test_small_max_function_context_stub_size ? kSmallMaximumSlots : kMaximumSlots; } // Maximum number of elements in copied array (chosen so that even an array // backed by a double backing store will fit into new-space). static const int kMaximumClonedShallowArrayElements = JSArray::kInitialMaxFastElementArray; // Maximum number of properties in copied object so that the properties store // will fit into new-space. This constant is based on the assumption that // NameDictionaries are 50% over-allocated. static const int kMaximumClonedShallowObjectProperties = NameDictionary::kMaxRegularCapacity / 3 * 2; private: static const int kMaximumSlots = (kMaxRegularHeapObjectSize - Context::kTodoHeaderSize) / kTaggedSize - 1; static const int kSmallMaximumSlots = 10; // FastNewFunctionContext can only allocate closures which fit in the // new space. STATIC_ASSERT(Context::SizeFor(kMaximumSlots + Context::MIN_CONTEXT_SLOTS) < kMaxRegularHeapObjectSize); }; } // namespace internal } // namespace v8 #endif // V8_BUILTINS_BUILTINS_CONSTRUCTOR_H_