// Copyright 2018 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_OBJECTS_FEEDBACK_CELL_H_ #define V8_OBJECTS_FEEDBACK_CELL_H_ #include "src/objects/struct.h" // Has to be the last include (doesn't have include guards): #include "src/objects/object-macros.h" namespace v8 { namespace internal { // This is a special cell used to maintain both the link between a // closure and its feedback vector, as well as a way to count the // number of closures created for a certain function per native // context. There's at most one FeedbackCell for each function in // a native context. class FeedbackCell : public Struct { public: static int GetInitialInterruptBudget() { if (FLAG_lazy_feedback_allocation) { return FLAG_budget_for_feedback_vector_allocation; } return FLAG_interrupt_budget; } // [value]: value of the cell. DECL_ACCESSORS(value, HeapObject) DECL_INT32_ACCESSORS(interrupt_budget) DECL_CAST(FeedbackCell) // Dispatched behavior. DECL_PRINTER(FeedbackCell) DECL_VERIFIER(FeedbackCell) // Layout description. DEFINE_FIELD_OFFSET_CONSTANTS(HeapObject::kHeaderSize, TORQUE_GENERATED_FEEDBACK_CELL_FIELDS) static const int kUnalignedSize = kSize; static const int kAlignedSize = RoundUp<kObjectAlignment>(int{kSize}); inline void clear_padding(); inline void reset(); using BodyDescriptor = FixedBodyDescriptor<kValueOffset, kInterruptBudgetOffset, kAlignedSize>; OBJECT_CONSTRUCTORS(FeedbackCell, Struct); }; } // namespace internal } // namespace v8 #include "src/objects/object-macros-undef.h" #endif // V8_OBJECTS_FEEDBACK_CELL_H_