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src/share/vm/gc/shenandoah/shenandoahHeap.hpp
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rev 14453 : Remove secondary marking bitmap.
@@ -133,12 +133,12 @@
ShenandoahHeapLock _lock;
ShenandoahCollectorPolicy* _shenandoah_policy;
size_t _bitmap_size;
size_t _bitmap_words_per_region;
MemRegion _heap_region;
- MemRegion _bitmap0_region;
- MemRegion _bitmap1_region;
+ MemRegion _bitmap_region;
+ MemRegion _aux_bitmap_region;
// Sortable array of regions
ShenandoahHeapRegionSet* _ordered_regions;
ShenandoahFreeSet* _free_regions;
ShenandoahCollectionSet* _collection_set;
@@ -163,20 +163,16 @@
volatile size_t _used;
volatile size_t _committed;
MarkBitMap _verification_bit_map;
- MarkBitMap _mark_bit_map0;
- MarkBitMap _mark_bit_map1;
- MarkBitMap* _complete_mark_bit_map;
- MarkBitMap* _next_mark_bit_map;
+ MarkBitMap _aux_bit_map;
+ MarkBitMap _mark_bit_map;
+ bool _bitmap_valid;
- HeapWord** _complete_top_at_mark_starts;
- HeapWord** _complete_top_at_mark_starts_base;
-
- HeapWord** _next_top_at_mark_starts;
- HeapWord** _next_top_at_mark_starts_base;
+ HeapWord** _top_at_mark_starts;
+ HeapWord** _top_at_mark_starts_base;
volatile jbyte _cancelled_concgc;
size_t _bytes_allocated_since_cm;
size_t _bytes_allocated_during_cm;
@@ -189,11 +185,11 @@
bool _update_refs_in_progress;
bool _concurrent_partial_in_progress;
unsigned int _evacuation_in_progress;
bool _need_update_refs;
- bool _need_reset_bitmaps;
+ bool _need_reset_bitmap;
ReferenceProcessor* _ref_processor;
ShenandoahForwardedIsAliveClosure _forwarded_is_alive;
ShenandoahIsAliveClosure _is_alive;
@@ -343,17 +339,13 @@
inline bool in_collection_set(ShenandoahHeapRegion* r) const;
template <class T>
inline bool in_collection_set(T obj) const;
- inline bool allocated_after_next_mark_start(HeapWord* addr) const;
- void set_next_top_at_mark_start(HeapWord* region_base, HeapWord* addr);
- HeapWord* next_top_at_mark_start(HeapWord* region_base);
-
- inline bool allocated_after_complete_mark_start(HeapWord* addr) const;
- void set_complete_top_at_mark_start(HeapWord* region_base, HeapWord* addr);
- HeapWord* complete_top_at_mark_start(HeapWord* region_base);
+ inline bool allocated_after_mark_start(HeapWord* addr) const;
+ void set_top_at_mark_start(HeapWord* region_base, HeapWord* addr);
+ HeapWord* top_at_mark_start(HeapWord* region_base);
// Evacuates object src. Returns the evacuated object if this thread
// succeeded, otherwise rolls back the evacuation and returns the
// evacuated object by the competing thread. 'succeeded' is an out
// param and set to true if this thread succeeded, otherwise to false.
@@ -381,21 +373,20 @@
void handle_heap_shrinkage();
size_t garbage();
- void reset_next_mark_bitmap(WorkGang* gang);
- void reset_complete_mark_bitmap(WorkGang* gang);
+ void reset_mark_bitmap(WorkGang* gang);
+
+ MarkBitMap* mark_bit_map();
+ inline bool is_marked(oop obj) const;
+ inline bool mark(oop obj);
+ bool is_bitmap_clear();
+ bool is_bitmap_clear_range(HeapWord* start, HeapWord* end);
- MarkBitMap* complete_mark_bit_map();
- MarkBitMap* next_mark_bit_map();
- inline bool is_marked_complete(oop obj) const;
- inline bool mark_next(oop obj) const;
- inline bool is_marked_next(oop obj) const;
- bool is_next_bitmap_clear();
- bool is_next_bitmap_clear_range(HeapWord* start, HeapWord* end);
- bool is_complete_bitmap_clear_range(HeapWord* start, HeapWord* end);
+ bool is_bitmap_valid() const { return _bitmap_valid; }
+ void set_bitmap_valid(bool valid) { _bitmap_valid = valid; }
bool commit_bitmaps(ShenandoahHeapRegion* r);
bool uncommit_bitmaps(ShenandoahHeapRegion* r);
template <class T>
@@ -457,12 +448,10 @@
template<class T>
inline void marked_object_oop_safe_iterate(ShenandoahHeapRegion* region, T* cl);
GCTimer* gc_timer() const;
- void swap_mark_bitmaps();
-
void cancel_concgc(GCCause::Cause cause);
void cancel_concgc(ShenandoahCancelCause cause);
ShenandoahHeapLock* lock() { return &_lock; }
void assert_heaplock_owned_by_current_thread() PRODUCT_RETURN;
@@ -501,15 +490,15 @@
inline HeapWord* allocate_from_gclab(Thread* thread, size_t size);
HeapWord* allocate_from_gclab_slow(Thread* thread, size_t size);
HeapWord* allocate_new_gclab(size_t word_size);
template<class T>
- inline void do_marked_object(MarkBitMap* bitmap, T* cl, oop obj);
+ inline void do_marked_object(T* cl, oop obj);
ShenandoahConcurrentThread* concurrent_thread() { return _concurrent_gc_thread; }
- inline bool mark_next_no_checks(oop obj) const;
+ inline bool mark_no_checks(oop obj);
public:
inline oop atomic_compare_exchange_oop(oop n, narrowOop* addr, oop c);
inline oop atomic_compare_exchange_oop(oop n, oop* addr, oop c);
@@ -543,8 +532,10 @@
void set_alloc_seq_gc_start();
void set_alloc_seq_gc_end();
void set_used_at_last_gc() {_used_at_last_gc = used();}
+
+ void make_tlabs_parsable(bool retire_tlabs) /* override */;
};
#endif // SHARE_VM_GC_SHENANDOAH_SHENANDOAHHEAP_HPP
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