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Issue 21074004: Cleaning up HAllocate space and double alignment selection. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 7 years, 4 months ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 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
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476 476
477 DISALLOW_COPY_AND_ASSIGN(ExternalStringTable); 477 DISALLOW_COPY_AND_ASSIGN(ExternalStringTable);
478 }; 478 };
479 479
480 480
481 enum ArrayStorageAllocationMode { 481 enum ArrayStorageAllocationMode {
482 DONT_INITIALIZE_ARRAY_ELEMENTS, 482 DONT_INITIALIZE_ARRAY_ELEMENTS,
483 INITIALIZE_ARRAY_ELEMENTS_WITH_HOLE 483 INITIALIZE_ARRAY_ELEMENTS_WITH_HOLE
484 }; 484 };
485 485
486
486 class Heap { 487 class Heap {
487 public: 488 public:
488 // Configure heap size before setup. Return false if the heap has been 489 // Configure heap size before setup. Return false if the heap has been
489 // set up already. 490 // set up already.
490 bool ConfigureHeap(int max_semispace_size, 491 bool ConfigureHeap(int max_semispace_size,
491 intptr_t max_old_gen_size, 492 intptr_t max_old_gen_size,
492 intptr_t max_executable_size); 493 intptr_t max_executable_size);
493 bool ConfigureHeapDefault(); 494 bool ConfigureHeapDefault();
494 495
495 // Prepares the heap, setting up memory areas that are needed in the isolate 496 // Prepares the heap, setting up memory areas that are needed in the isolate
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1392 bool Contains(Address addr); 1393 bool Contains(Address addr);
1393 bool Contains(HeapObject* value); 1394 bool Contains(HeapObject* value);
1394 1395
1395 // Checks whether an address/object in a space. 1396 // Checks whether an address/object in a space.
1396 // Currently used by tests, serialization and heap verification only. 1397 // Currently used by tests, serialization and heap verification only.
1397 bool InSpace(Address addr, AllocationSpace space); 1398 bool InSpace(Address addr, AllocationSpace space);
1398 bool InSpace(HeapObject* value, AllocationSpace space); 1399 bool InSpace(HeapObject* value, AllocationSpace space);
1399 1400
1400 // Finds out which space an object should get promoted to based on its type. 1401 // Finds out which space an object should get promoted to based on its type.
1401 inline OldSpace* TargetSpace(HeapObject* object); 1402 inline OldSpace* TargetSpace(HeapObject* object);
1402 inline AllocationSpace TargetSpaceId(InstanceType type); 1403 static inline AllocationSpace TargetSpaceId(InstanceType type);
1403 1404
1404 // Sets the stub_cache_ (only used when expanding the dictionary). 1405 // Sets the stub_cache_ (only used when expanding the dictionary).
1405 void public_set_code_stubs(UnseededNumberDictionary* value) { 1406 void public_set_code_stubs(UnseededNumberDictionary* value) {
1406 roots_[kCodeStubsRootIndex] = value; 1407 roots_[kCodeStubsRootIndex] = value;
1407 } 1408 }
1408 1409
1409 // Support for computing object sizes for old objects during GCs. Returns 1410 // Support for computing object sizes for old objects during GCs. Returns
1410 // a function that is guaranteed to be safe for computing object sizes in 1411 // a function that is guaranteed to be safe for computing object sizes in
1411 // the current GC phase. 1412 // the current GC phase.
1412 HeapObjectCallback GcSafeSizeOfOldObjectFunction() { 1413 HeapObjectCallback GcSafeSizeOfOldObjectFunction() {
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1539 // Adjusts the amount of registered external memory. 1540 // Adjusts the amount of registered external memory.
1540 // Returns the adjusted value. 1541 // Returns the adjusted value.
1541 inline intptr_t AdjustAmountOfExternalAllocatedMemory( 1542 inline intptr_t AdjustAmountOfExternalAllocatedMemory(
1542 intptr_t change_in_bytes); 1543 intptr_t change_in_bytes);
1543 1544
1544 // Allocate uninitialized fixed array. 1545 // Allocate uninitialized fixed array.
1545 MUST_USE_RESULT MaybeObject* AllocateRawFixedArray(int length); 1546 MUST_USE_RESULT MaybeObject* AllocateRawFixedArray(int length);
1546 MUST_USE_RESULT MaybeObject* AllocateRawFixedArray(int length, 1547 MUST_USE_RESULT MaybeObject* AllocateRawFixedArray(int length,
1547 PretenureFlag pretenure); 1548 PretenureFlag pretenure);
1548 1549
1549 // Predicate that governs global pre-tenuring decisions based on observed
1550 // promotion rates of previous collections.
1551 inline bool ShouldGloballyPretenure() {
1552 return FLAG_pretenuring && new_space_high_promotion_mode_active_;
1553 }
1554
1555 // This is only needed for testing high promotion mode. 1550 // This is only needed for testing high promotion mode.
1556 void SetNewSpaceHighPromotionModeActive(bool mode) { 1551 void SetNewSpaceHighPromotionModeActive(bool mode) {
1557 new_space_high_promotion_mode_active_ = mode; 1552 new_space_high_promotion_mode_active_ = mode;
1558 } 1553 }
1559 1554
1555 // Returns the allocation mode (pre-tenuring) based on observed promotion
1556 // rates of previous collections.
1560 inline PretenureFlag GetPretenureMode() { 1557 inline PretenureFlag GetPretenureMode() {
1561 return new_space_high_promotion_mode_active_ ? TENURED : NOT_TENURED; 1558 return FLAG_pretenuring && new_space_high_promotion_mode_active_
1559 ? TENURED : NOT_TENURED;
1562 } 1560 }
1563 1561
1564 inline Address* NewSpaceHighPromotionModeActiveAddress() { 1562 inline Address* NewSpaceHighPromotionModeActiveAddress() {
1565 return reinterpret_cast<Address*>(&new_space_high_promotion_mode_active_); 1563 return reinterpret_cast<Address*>(&new_space_high_promotion_mode_active_);
1566 } 1564 }
1567 1565
1568 inline intptr_t PromotedTotalSize() { 1566 inline intptr_t PromotedTotalSize() {
1569 return PromotedSpaceSizeOfObjects() + PromotedExternalMemorySize(); 1567 return PromotedSpaceSizeOfObjects() + PromotedExternalMemorySize();
1570 } 1568 }
1571 1569
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3051 DisallowHeapAllocation no_allocation; // i.e. no gc allowed. 3049 DisallowHeapAllocation no_allocation; // i.e. no gc allowed.
3052 3050
3053 private: 3051 private:
3054 DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer); 3052 DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
3055 }; 3053 };
3056 #endif // DEBUG 3054 #endif // DEBUG
3057 3055
3058 } } // namespace v8::internal 3056 } } // namespace v8::internal
3059 3057
3060 #endif // V8_HEAP_H_ 3058 #endif // V8_HEAP_H_
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