OLD | NEW |
1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
(...skipping 2424 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
2435 | 2435 |
2436 // ----------------------------------------------------------------------------- | 2436 // ----------------------------------------------------------------------------- |
2437 // Large objects ( > Page::kMaxHeapObjectSize ) are allocated and managed by | 2437 // Large objects ( > Page::kMaxHeapObjectSize ) are allocated and managed by |
2438 // the large object space. A large object is allocated from OS heap with | 2438 // the large object space. A large object is allocated from OS heap with |
2439 // extra padding bytes (Page::kPageSize + Page::kObjectStartOffset). | 2439 // extra padding bytes (Page::kPageSize + Page::kObjectStartOffset). |
2440 // A large object always starts at Page::kObjectStartOffset to a page. | 2440 // A large object always starts at Page::kObjectStartOffset to a page. |
2441 // Large objects do not move during garbage collections. | 2441 // Large objects do not move during garbage collections. |
2442 | 2442 |
2443 class LargeObjectSpace : public Space { | 2443 class LargeObjectSpace : public Space { |
2444 public: | 2444 public: |
2445 LargeObjectSpace(Heap* heap, AllocationSpace id); | 2445 LargeObjectSpace(Heap* heap, intptr_t max_capacity, AllocationSpace id); |
2446 virtual ~LargeObjectSpace() {} | 2446 virtual ~LargeObjectSpace() {} |
2447 | 2447 |
2448 // Initializes internal data structures. | 2448 // Initializes internal data structures. |
2449 bool Setup(); | 2449 bool Setup(); |
2450 | 2450 |
2451 // Releases internal resources, frees objects in this space. | 2451 // Releases internal resources, frees objects in this space. |
2452 void TearDown(); | 2452 void TearDown(); |
2453 | 2453 |
2454 static intptr_t ObjectSizeFor(intptr_t chunk_size) { | 2454 static intptr_t ObjectSizeFor(intptr_t chunk_size) { |
2455 if (chunk_size <= (Page::kPageSize + Page::kObjectStartOffset)) return 0; | 2455 if (chunk_size <= (Page::kPageSize + Page::kObjectStartOffset)) return 0; |
(...skipping 49 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
2505 virtual void Verify(); | 2505 virtual void Verify(); |
2506 virtual void Print(); | 2506 virtual void Print(); |
2507 void ReportStatistics(); | 2507 void ReportStatistics(); |
2508 void CollectCodeStatistics(); | 2508 void CollectCodeStatistics(); |
2509 #endif | 2509 #endif |
2510 // Checks whether an address is in the object area in this space. It | 2510 // Checks whether an address is in the object area in this space. It |
2511 // iterates all objects in the space. May be slow. | 2511 // iterates all objects in the space. May be slow. |
2512 bool SlowContains(Address addr) { return !FindObject(addr)->IsFailure(); } | 2512 bool SlowContains(Address addr) { return !FindObject(addr)->IsFailure(); } |
2513 | 2513 |
2514 private: | 2514 private: |
| 2515 intptr_t max_capacity_; |
2515 // The head of the linked list of large object chunks. | 2516 // The head of the linked list of large object chunks. |
2516 LargePage* first_page_; | 2517 LargePage* first_page_; |
2517 intptr_t size_; // allocated bytes | 2518 intptr_t size_; // allocated bytes |
2518 int page_count_; // number of chunks | 2519 int page_count_; // number of chunks |
2519 intptr_t objects_size_; // size of objects | 2520 intptr_t objects_size_; // size of objects |
2520 | 2521 |
2521 friend class LargeObjectIterator; | 2522 friend class LargeObjectIterator; |
2522 | 2523 |
2523 public: | 2524 public: |
2524 TRACK_MEMORY("LargeObjectSpace") | 2525 TRACK_MEMORY("LargeObjectSpace") |
(...skipping 89 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
2614 } | 2615 } |
2615 // Must be small, since an iteration is used for lookup. | 2616 // Must be small, since an iteration is used for lookup. |
2616 static const int kMaxComments = 64; | 2617 static const int kMaxComments = 64; |
2617 }; | 2618 }; |
2618 #endif | 2619 #endif |
2619 | 2620 |
2620 | 2621 |
2621 } } // namespace v8::internal | 2622 } } // namespace v8::internal |
2622 | 2623 |
2623 #endif // V8_SPACES_H_ | 2624 #endif // V8_SPACES_H_ |
OLD | NEW |