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1 // Copyright 2015 the V8 project authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef V8_HEAP_ARRAY_BUFFER_TRACKER_H_ | 5 #ifndef V8_HEAP_ARRAY_BUFFER_TRACKER_H_ |
6 #define V8_HEAP_ARRAY_BUFFER_TRACKER_H_ | 6 #define V8_HEAP_ARRAY_BUFFER_TRACKER_H_ |
7 | 7 |
8 #include <map> | 8 #include <map> |
9 | 9 |
10 #include "src/base/platform/mutex.h" | |
11 #include "src/globals.h" | 10 #include "src/globals.h" |
12 | 11 |
13 namespace v8 { | 12 namespace v8 { |
14 namespace internal { | 13 namespace internal { |
15 | 14 |
16 // Forward declarations. | 15 // Forward declarations. |
17 class Heap; | 16 class Heap; |
18 class JSArrayBuffer; | 17 class JSArrayBuffer; |
19 | 18 |
20 class ArrayBufferTracker { | 19 class ArrayBufferTracker { |
(...skipping 20 matching lines...) Expand all Loading... |
41 void FreeDead(bool from_scavenge); | 40 void FreeDead(bool from_scavenge); |
42 | 41 |
43 // Prepare for a new scavenge phase. A new marking phase is implicitly | 42 // Prepare for a new scavenge phase. A new marking phase is implicitly |
44 // prepared by finishing the previous one. | 43 // prepared by finishing the previous one. |
45 void PrepareDiscoveryInNewSpace(); | 44 void PrepareDiscoveryInNewSpace(); |
46 | 45 |
47 // An ArrayBuffer moved from new space to old space. | 46 // An ArrayBuffer moved from new space to old space. |
48 void Promote(JSArrayBuffer* buffer); | 47 void Promote(JSArrayBuffer* buffer); |
49 | 48 |
50 private: | 49 private: |
51 base::Mutex mutex_; | |
52 Heap* heap_; | 50 Heap* heap_; |
53 | 51 |
54 // |live_array_buffers_| maps externally allocated memory used as backing | 52 // |live_array_buffers_| maps externally allocated memory used as backing |
55 // store for ArrayBuffers to the length of the respective memory blocks. | 53 // store for ArrayBuffers to the length of the respective memory blocks. |
56 // | 54 // |
57 // At the beginning of mark/compact, |not_yet_discovered_array_buffers_| is | 55 // At the beginning of mark/compact, |not_yet_discovered_array_buffers_| is |
58 // a copy of |live_array_buffers_| and we remove pointers as we discover live | 56 // a copy of |live_array_buffers_| and we remove pointers as we discover live |
59 // ArrayBuffer objects during marking. At the end of mark/compact, the | 57 // ArrayBuffer objects during marking. At the end of mark/compact, the |
60 // remaining memory blocks can be freed. | 58 // remaining memory blocks can be freed. |
61 std::map<void*, size_t> live_array_buffers_; | 59 std::map<void*, size_t> live_array_buffers_; |
62 std::map<void*, size_t> not_yet_discovered_array_buffers_; | 60 std::map<void*, size_t> not_yet_discovered_array_buffers_; |
63 | 61 |
64 // To be able to free memory held by ArrayBuffers during scavenge as well, we | 62 // To be able to free memory held by ArrayBuffers during scavenge as well, we |
65 // have a separate list of allocated memory held by ArrayBuffers in new space. | 63 // have a separate list of allocated memory held by ArrayBuffers in new space. |
66 // | 64 // |
67 // Since mark/compact also evacuates the new space, all pointers in the | 65 // Since mark/compact also evacuates the new space, all pointers in the |
68 // |live_array_buffers_for_scavenge_| list are also in the | 66 // |live_array_buffers_for_scavenge_| list are also in the |
69 // |live_array_buffers_| list. | 67 // |live_array_buffers_| list. |
70 std::map<void*, size_t> live_array_buffers_for_scavenge_; | 68 std::map<void*, size_t> live_array_buffers_for_scavenge_; |
71 std::map<void*, size_t> not_yet_discovered_array_buffers_for_scavenge_; | 69 std::map<void*, size_t> not_yet_discovered_array_buffers_for_scavenge_; |
72 }; | 70 }; |
73 } // namespace internal | 71 } // namespace internal |
74 } // namespace v8 | 72 } // namespace v8 |
75 #endif // V8_HEAP_ARRAY_BUFFER_TRACKER_H_ | 73 #endif // V8_HEAP_ARRAY_BUFFER_TRACKER_H_ |
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