Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1 | // Copyright 2015 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #ifndef V8_CONTEXT_MEASURE_H_ |
| 6 | #define V8_CONTEXT_MEASURE_H_ |
| 7 | |
| 8 | #include "src/address-map.h" |
| 9 | #include "src/assert-scope.h" |
| 10 | #include "src/objects.h" |
| 11 | |
| 12 | namespace v8 { |
| 13 | namespace internal { |
| 14 | |
| 15 | class ContextMeasure : public ObjectVisitor { |
| 16 | public: |
| 17 | explicit ContextMeasure(Context* context); |
| 18 | |
| 19 | int Size() { return size_; } |
| 20 | int Count() { return count_; } |
| 21 | |
| 22 | void VisitPointers(Object** start, Object** end) override; |
| 23 | |
| 24 | private: |
| 25 | void MeasureObject(HeapObject* object); |
| 26 | void MeasureDeferredObjects(); |
| 27 | void MeasureAndRecurse(HeapObject* object); |
| 28 | bool IsShared(HeapObject* object); |
| 29 | |
| 30 | Context* context_; |
| 31 | |
| 32 | BackReferenceMap back_reference_map_; |
| 33 | RootIndexMap root_index_map_; |
| 34 | |
| 35 | static const int kMaxRecursion = 16; |
| 36 | int recursion_depth_; |
| 37 | List<HeapObject*> deferred_objects_; |
| 38 | |
| 39 | int count_; |
| 40 | int size_; |
| 41 | |
| 42 | DisallowHeapAllocation no_gc_; |
| 43 | |
| 44 | DISALLOW_COPY_AND_ASSIGN(ContextMeasure); |
| 45 | }; |
| 46 | } // namespace internal |
| 47 | } // namespace v8 |
| 48 | |
| 49 | #endif // V8_CONTEXT_MEASURE_H_ |