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1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #ifndef VM_PAGES_H_ | 5 #ifndef VM_PAGES_H_ |
6 #define VM_PAGES_H_ | 6 #define VM_PAGES_H_ |
7 | 7 |
8 #include "vm/freelist.h" | 8 #include "vm/freelist.h" |
9 #include "vm/globals.h" | 9 #include "vm/globals.h" |
10 #include "vm/virtual_memory.h" | 10 #include "vm/virtual_memory.h" |
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37 } | 37 } |
38 | 38 |
39 void set_used(uword used) { used_ = used; } | 39 void set_used(uword used) { used_ = used; } |
40 uword used() const { return used_; } | 40 uword used() const { return used_; } |
41 void AddUsed(uword size) { | 41 void AddUsed(uword size) { |
42 used_ += size; | 42 used_ += size; |
43 } | 43 } |
44 | 44 |
45 void VisitObjectPointers(ObjectPointerVisitor* visitor) const; | 45 void VisitObjectPointers(ObjectPointerVisitor* visitor) const; |
46 | 46 |
| 47 RawObject* FindObject(FindObjectVisitor* visitor) const; |
| 48 |
47 private: | 49 private: |
48 static HeapPage* Initialize(VirtualMemory* memory, bool is_executable); | 50 static HeapPage* Initialize(VirtualMemory* memory, bool is_executable); |
49 static HeapPage* Allocate(intptr_t size, bool is_executable); | 51 static HeapPage* Allocate(intptr_t size, bool is_executable); |
50 | 52 |
51 // Deallocate the virtual memory backing this page. The page pointer to this | 53 // Deallocate the virtual memory backing this page. The page pointer to this |
52 // page becomes immediately inaccessible. | 54 // page becomes immediately inaccessible. |
53 void Deallocate(); | 55 void Deallocate(); |
54 | 56 |
55 VirtualMemory* memory_; | 57 VirtualMemory* memory_; |
56 HeapPage* next_; | 58 HeapPage* next_; |
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79 bool Contains(uword addr) const; | 81 bool Contains(uword addr) const; |
80 bool IsValidAddress(uword addr) const { | 82 bool IsValidAddress(uword addr) const { |
81 return Contains(addr); | 83 return Contains(addr); |
82 } | 84 } |
83 static bool IsPageAllocatableSize(intptr_t size) { | 85 static bool IsPageAllocatableSize(intptr_t size) { |
84 return size <= kAllocatablePageSize; | 86 return size <= kAllocatablePageSize; |
85 } | 87 } |
86 | 88 |
87 void VisitObjectPointers(ObjectPointerVisitor* visitor) const; | 89 void VisitObjectPointers(ObjectPointerVisitor* visitor) const; |
88 | 90 |
| 91 RawObject* FindObject(FindObjectVisitor* visitor) const; |
| 92 |
89 // Collect the garbage in the page space using mark-sweep. | 93 // Collect the garbage in the page space using mark-sweep. |
90 void MarkSweep(bool invoke_api_callbacks); | 94 void MarkSweep(bool invoke_api_callbacks); |
91 | 95 |
92 static HeapPage* PageFor(RawObject* raw_obj) { | 96 static HeapPage* PageFor(RawObject* raw_obj) { |
93 return reinterpret_cast<HeapPage*>( | 97 return reinterpret_cast<HeapPage*>( |
94 RawObject::ToAddr(raw_obj) & ~(kPageSize -1)); | 98 RawObject::ToAddr(raw_obj) & ~(kPageSize -1)); |
95 } | 99 } |
96 | 100 |
97 private: | 101 private: |
98 static const intptr_t kAllocatablePageSize = kPageSize - sizeof(HeapPage); | 102 static const intptr_t kAllocatablePageSize = kPageSize - sizeof(HeapPage); |
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130 | 134 |
131 // Keep track whether a MarkSweep is currently running. | 135 // Keep track whether a MarkSweep is currently running. |
132 bool sweeping_; | 136 bool sweeping_; |
133 | 137 |
134 DISALLOW_IMPLICIT_CONSTRUCTORS(PageSpace); | 138 DISALLOW_IMPLICIT_CONSTRUCTORS(PageSpace); |
135 }; | 139 }; |
136 | 140 |
137 } // namespace dart | 141 } // namespace dart |
138 | 142 |
139 #endif // VM_PAGES_H_ | 143 #endif // VM_PAGES_H_ |
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