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comparison src/share/vm/gc_interface/collectedHeap.hpp @ 113:ba764ed4b6f2

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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold
author coleenp
date Sun, 13 Apr 2008 17:43:42 -0400
parents a61af66fc99e
children d1605aabd0a1 37f87013dfd8
comparison
equal deleted inserted replaced
110:a49a647afe9a 113:ba764ed4b6f2
51 MemRegion _reserved; 51 MemRegion _reserved;
52 BarrierSet* _barrier_set; 52 BarrierSet* _barrier_set;
53 bool _is_gc_active; 53 bool _is_gc_active;
54 unsigned int _total_collections; // ... started 54 unsigned int _total_collections; // ... started
55 unsigned int _total_full_collections; // ... started 55 unsigned int _total_full_collections; // ... started
56 size_t _max_heap_capacity;
57 NOT_PRODUCT(volatile size_t _promotion_failure_alot_count;) 56 NOT_PRODUCT(volatile size_t _promotion_failure_alot_count;)
58 NOT_PRODUCT(volatile size_t _promotion_failure_alot_gc_number;) 57 NOT_PRODUCT(volatile size_t _promotion_failure_alot_gc_number;)
59 58
60 // Reason for current garbage collection. Should be set to 59 // Reason for current garbage collection. Should be set to
61 // a value reflecting no collection between collections. 60 // a value reflecting no collection between collections.
147 // after the Universe is fully formed, but before general heap allocation is allowed. 146 // after the Universe is fully formed, but before general heap allocation is allowed.
148 // This is the correct place to place such initialization methods. 147 // This is the correct place to place such initialization methods.
149 virtual void post_initialize() = 0; 148 virtual void post_initialize() = 0;
150 149
151 MemRegion reserved_region() const { return _reserved; } 150 MemRegion reserved_region() const { return _reserved; }
152 151 address base() const { return (address)reserved_region().start(); }
153 // Return the number of bytes currently reserved, committed, and used,
154 // respectively, for holding objects.
155 size_t reserved_obj_bytes() const { return _reserved.byte_size(); }
156 152
157 // Future cleanup here. The following functions should specify bytes or 153 // Future cleanup here. The following functions should specify bytes or
158 // heapwords as part of their signature. 154 // heapwords as part of their signature.
159 virtual size_t capacity() const = 0; 155 virtual size_t capacity() const = 0;
160 virtual size_t used() const = 0; 156 virtual size_t used() const = 0;