| // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| #ifndef RUNTIME_VM_VISITOR_H_ |
| #define RUNTIME_VM_VISITOR_H_ |
| |
| #include "vm/allocation.h" |
| #include "vm/class_table.h" |
| #include "vm/globals.h" |
| #include "vm/growable_array.h" |
| |
| namespace dart { |
| |
| // Forward declarations. |
| class Isolate; |
| class IsolateGroup; |
| |
| // An object pointer visitor interface. |
| class ObjectPointerVisitor { |
| public: |
| explicit ObjectPointerVisitor(IsolateGroup* isolate_group); |
| virtual ~ObjectPointerVisitor() {} |
| |
| IsolateGroup* isolate_group() const { return isolate_group_; } |
| |
| // Visit pointers inside the given typed data [view]. |
| // |
| // Range of pointers to visit 'first' <= pointer <= 'last'. |
| virtual void VisitTypedDataViewPointers(TypedDataViewPtr view, |
| ObjectPtr* first, |
| ObjectPtr* last) { |
| VisitPointers(first, last); |
| } |
| |
| // Range of pointers to visit 'first' <= pointer <= 'last'. |
| virtual void VisitPointers(ObjectPtr* first, ObjectPtr* last) = 0; |
| |
| // len argument is the number of pointers to visit starting from 'p'. |
| void VisitPointers(ObjectPtr* p, intptr_t len) { |
| VisitPointers(p, (p + len - 1)); |
| } |
| |
| void VisitPointer(ObjectPtr* p) { VisitPointers(p, p); } |
| |
| const char* gc_root_type() const { return gc_root_type_; } |
| void set_gc_root_type(const char* gc_root_type) { |
| gc_root_type_ = gc_root_type; |
| } |
| |
| void clear_gc_root_type() { gc_root_type_ = "unknown"; } |
| |
| virtual bool visit_weak_persistent_handles() const { return false; } |
| |
| const SharedClassTable* shared_class_table() const { |
| return shared_class_table_; |
| } |
| |
| private: |
| IsolateGroup* isolate_group_; |
| const char* gc_root_type_; |
| SharedClassTable* shared_class_table_; |
| |
| DISALLOW_IMPLICIT_CONSTRUCTORS(ObjectPointerVisitor); |
| }; |
| |
| // An object visitor interface. |
| class ObjectVisitor { |
| public: |
| ObjectVisitor() {} |
| |
| virtual ~ObjectVisitor() {} |
| |
| // Invoked for each object. |
| virtual void VisitObject(ObjectPtr obj) = 0; |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(ObjectVisitor); |
| }; |
| |
| // An object finder visitor interface. |
| class FindObjectVisitor { |
| public: |
| FindObjectVisitor() {} |
| virtual ~FindObjectVisitor() {} |
| |
| // Allow to specify a address filter. |
| virtual uword filter_addr() const { return 0; } |
| bool VisitRange(uword begin_addr, uword end_addr) const { |
| uword addr = filter_addr(); |
| return (addr == 0) || ((begin_addr <= addr) && (addr < end_addr)); |
| } |
| |
| // Check if object matches find condition. |
| virtual bool FindObject(ObjectPtr obj) const = 0; |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(FindObjectVisitor); |
| }; |
| |
| } // namespace dart |
| |
| #endif // RUNTIME_VM_VISITOR_H_ |