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Issue 1159123002: Revert of Clean up aligned allocation code in preparation for SIMD alignments. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 5 years, 6 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 // 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_HEAP_H_ 5 #ifndef V8_HEAP_HEAP_H_
6 #define V8_HEAP_HEAP_H_ 6 #define V8_HEAP_HEAP_H_
7 7
8 #include <cmath> 8 #include <cmath>
9 #include <map> 9 #include <map>
10 10
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709 bool CanExpandOldGeneration(int size) { 709 bool CanExpandOldGeneration(int size) {
710 return (CommittedOldGenerationMemory() + size) < MaxOldGenerationSize(); 710 return (CommittedOldGenerationMemory() + size) < MaxOldGenerationSize();
711 } 711 }
712 712
713 // Returns a deep copy of the JavaScript object. 713 // Returns a deep copy of the JavaScript object.
714 // Properties and elements are copied too. 714 // Properties and elements are copied too.
715 // Optionally takes an AllocationSite to be appended in an AllocationMemento. 715 // Optionally takes an AllocationSite to be appended in an AllocationMemento.
716 MUST_USE_RESULT AllocationResult 716 MUST_USE_RESULT AllocationResult
717 CopyJSObject(JSObject* source, AllocationSite* site = NULL); 717 CopyJSObject(JSObject* source, AllocationSite* site = NULL);
718 718
719 // Calculates the maximum amount of filler that could be required by the 719 // This method assumes overallocation of one word. It will store a filler
720 // given alignment. 720 // before the object if the given object is not double aligned, otherwise
721 static int GetMaximumFillToAlign(AllocationAlignment alignment); 721 // it will place the filler after the object.
722 // Calculates the actual amount of filler required for a given address at the 722 MUST_USE_RESULT HeapObject* EnsureAligned(HeapObject* object, int size,
723 // given alignment. 723 AllocationAlignment alignment);
724 static int GetFillToAlign(Address address, AllocationAlignment alignment);
725 724
726 // Creates a filler object and returns a heap object immediately after it. 725 MUST_USE_RESULT HeapObject* PrecedeWithFiller(HeapObject* object);
727 MUST_USE_RESULT HeapObject* PrecedeWithFiller(HeapObject* object,
728 int filler_size);
729 // Creates a filler object if needed for alignment and returns a heap object
730 // immediately after it. If any space is left after the returned object,
731 // another filler object is created so the over allocated memory is iterable.
732 MUST_USE_RESULT HeapObject* AlignWithFiller(HeapObject* object,
733 int object_size,
734 int allocation_size,
735 AllocationAlignment alignment);
736 726
737 // Clear the Instanceof cache (used when a prototype changes). 727 // Clear the Instanceof cache (used when a prototype changes).
738 inline void ClearInstanceofCache(); 728 inline void ClearInstanceofCache();
739 729
740 // Iterates the whole code space to clear all ICs of the given kind. 730 // Iterates the whole code space to clear all ICs of the given kind.
741 void ClearAllICsByKind(Code::Kind kind); 731 void ClearAllICsByKind(Code::Kind kind);
742 732
743 // FreeSpace objects have a null map after deserialization. Update the map. 733 // FreeSpace objects have a null map after deserialization. Update the map.
744 void RepairFreeListsAfterDeserialization(); 734 void RepairFreeListsAfterDeserialization();
745 735
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2706 DisallowHeapAllocation no_allocation; // i.e. no gc allowed. 2696 DisallowHeapAllocation no_allocation; // i.e. no gc allowed.
2707 2697
2708 private: 2698 private:
2709 DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer); 2699 DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
2710 }; 2700 };
2711 #endif // DEBUG 2701 #endif // DEBUG
2712 } 2702 }
2713 } // namespace v8::internal 2703 } // namespace v8::internal
2714 2704
2715 #endif // V8_HEAP_HEAP_H_ 2705 #endif // V8_HEAP_HEAP_H_
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