| // 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_ |