44 45 private: 46 // Allocate from the current thread's TLAB, with broken-out slow path. 47 HeapWord* allocate_inside_tlab(Allocation& allocation) const; 48 HeapWord* allocate_inside_tlab_slow(Allocation& allocation) const; 49 HeapWord* allocate_outside_tlab(Allocation& allocation) const; 50 51 protected: 52 MemAllocator(Klass* klass, size_t word_size, Thread* thread) 53 : _heap(Universe::heap()), 54 _thread(thread), 55 _klass(klass), 56 _word_size(word_size) 57 { } 58 59 // This function clears the memory of the object 60 void mem_clear(HeapWord* mem) const; 61 // This finish constructing an oop by installing the mark word and the Klass* pointer 62 // last. At the point when the Klass pointer is initialized, this is a constructed object 63 // that must be parseable as an oop by concurrent collectors. 64 oop finish(HeapWord* mem) const; 65 66 // Raw memory allocation. This may or may not use TLAB allocations to satisfy the 67 // allocation. A GC implementation may override this function to satisfy the allocation 68 // in any way. But the default is to try a TLAB allocation, and otherwise perform 69 // mem_allocate. 70 virtual HeapWord* mem_allocate(Allocation& allocation) const; 71 72 virtual MemRegion obj_memory_range(oop obj) const { 73 return MemRegion((HeapWord*)obj, _word_size); 74 } 75 76 public: 77 oop allocate() const; 78 virtual oop initialize(HeapWord* mem) const = 0; 79 }; 80 81 class ObjAllocator: public MemAllocator { 82 public: 83 ObjAllocator(Klass* klass, size_t word_size, Thread* thread = Thread::current()) 84 : MemAllocator(klass, word_size, thread) {} | 44 45 private: 46 // Allocate from the current thread's TLAB, with broken-out slow path. 47 HeapWord* allocate_inside_tlab(Allocation& allocation) const; 48 HeapWord* allocate_inside_tlab_slow(Allocation& allocation) const; 49 HeapWord* allocate_outside_tlab(Allocation& allocation) const; 50 51 protected: 52 MemAllocator(Klass* klass, size_t word_size, Thread* thread) 53 : _heap(Universe::heap()), 54 _thread(thread), 55 _klass(klass), 56 _word_size(word_size) 57 { } 58 59 // This function clears the memory of the object 60 void mem_clear(HeapWord* mem) const; 61 // This finish constructing an oop by installing the mark word and the Klass* pointer 62 // last. At the point when the Klass pointer is initialized, this is a constructed object 63 // that must be parseable as an oop by concurrent collectors. 64 inline void finish_mark(HeapWord* mem) const; 65 oop finish(HeapWord* mem) const; 66 // Encode any extra metadata properties for arrays 67 oop finish_with_properties(HeapWord* mem, ArrayStorageProperties storage_props) const; 68 69 // Raw memory allocation. This may or may not use TLAB allocations to satisfy the 70 // allocation. A GC implementation may override this function to satisfy the allocation 71 // in any way. But the default is to try a TLAB allocation, and otherwise perform 72 // mem_allocate. 73 virtual HeapWord* mem_allocate(Allocation& allocation) const; 74 75 virtual MemRegion obj_memory_range(oop obj) const { 76 return MemRegion((HeapWord*)obj, _word_size); 77 } 78 79 public: 80 oop allocate() const; 81 virtual oop initialize(HeapWord* mem) const = 0; 82 }; 83 84 class ObjAllocator: public MemAllocator { 85 public: 86 ObjAllocator(Klass* klass, size_t word_size, Thread* thread = Thread::current()) 87 : MemAllocator(klass, word_size, thread) {} |