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comparison src/share/vm/gc_implementation/g1/g1SATBCardTableModRefBS.hpp @ 20337:1f1d373cd044

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8038423: G1: Decommit memory within heap Summary: Allow G1 to decommit memory of arbitrary regions within the heap and their associated auxiliary data structures card table, BOT, hot card cache, and mark bitmaps. Reviewed-by: mgerdin, brutisso, jwilhelm
author tschatzl
date Thu, 21 Aug 2014 11:47:10 +0200
parents e5035defa3c4
children c02ec279b062
comparison
equal deleted inserted replaced
20336:6701abbc4441 20337:1f1d373cd044
23 */ 23 */
24 24
25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1SATBCARDTABLEMODREFBS_HPP 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1SATBCARDTABLEMODREFBS_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1SATBCARDTABLEMODREFBS_HPP 26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1SATBCARDTABLEMODREFBS_HPP
27 27
28 #include "gc_implementation/g1/g1RegionToSpaceMapper.hpp"
28 #include "memory/cardTableModRefBS.hpp" 29 #include "memory/cardTableModRefBS.hpp"
29 #include "memory/memRegion.hpp" 30 #include "memory/memRegion.hpp"
30 #include "oops/oop.inline.hpp" 31 #include "oops/oop.inline.hpp"
31 #include "utilities/macros.hpp" 32 #include "utilities/macros.hpp"
32 33
33 #if INCLUDE_ALL_GCS 34 #if INCLUDE_ALL_GCS
34 35
35 class DirtyCardQueueSet; 36 class DirtyCardQueueSet;
37 class G1SATBCardTableLoggingModRefBS;
36 38
37 // This barrier is specialized to use a logging barrier to support 39 // This barrier is specialized to use a logging barrier to support
38 // snapshot-at-the-beginning marking. 40 // snapshot-at-the-beginning marking.
39 41
40 class G1SATBCardTableModRefBS: public CardTableModRefBSForCTRS { 42 class G1SATBCardTableModRefBS: public CardTableModRefBSForCTRS {
124 126
125 bool is_card_deferred(size_t card_index) { 127 bool is_card_deferred(size_t card_index) {
126 jbyte val = _byte_map[card_index]; 128 jbyte val = _byte_map[card_index];
127 return (val & (clean_card_mask_val() | deferred_card_val())) == deferred_card_val(); 129 return (val & (clean_card_mask_val() | deferred_card_val())) == deferred_card_val();
128 } 130 }
131 };
129 132
133 class G1SATBCardTableLoggingModRefBSChangedListener : public G1MappingChangedListener {
134 private:
135 G1SATBCardTableLoggingModRefBS* _card_table;
136 public:
137 G1SATBCardTableLoggingModRefBSChangedListener() : _card_table(NULL) { }
138
139 void set_card_table(G1SATBCardTableLoggingModRefBS* card_table) { _card_table = card_table; }
140
141 virtual void on_commit(uint start_idx, size_t num_regions);
130 }; 142 };
131 143
132 // Adds card-table logging to the post-barrier. 144 // Adds card-table logging to the post-barrier.
133 // Usual invariant: all dirty cards are logged in the DirtyCardQueueSet. 145 // Usual invariant: all dirty cards are logged in the DirtyCardQueueSet.
134 class G1SATBCardTableLoggingModRefBS: public G1SATBCardTableModRefBS { 146 class G1SATBCardTableLoggingModRefBS: public G1SATBCardTableModRefBS {
147 friend class G1SATBCardTableLoggingModRefBSChangedListener;
135 private: 148 private:
149 G1SATBCardTableLoggingModRefBSChangedListener _listener;
136 DirtyCardQueueSet& _dcqs; 150 DirtyCardQueueSet& _dcqs;
137 public: 151 public:
152 static size_t compute_size(size_t mem_region_size_in_words) {
153 size_t number_of_slots = (mem_region_size_in_words / card_size_in_words);
154 return ReservedSpace::allocation_align_size_up(number_of_slots);
155 }
156
138 G1SATBCardTableLoggingModRefBS(MemRegion whole_heap, 157 G1SATBCardTableLoggingModRefBS(MemRegion whole_heap,
139 int max_covered_regions); 158 int max_covered_regions);
159
160 virtual void initialize() { }
161 virtual void initialize(G1RegionToSpaceMapper* mapper);
162
163 virtual void resize_covered_region(MemRegion new_region) { ShouldNotReachHere(); }
140 164
141 bool is_a(BarrierSet::Name bsn) { 165 bool is_a(BarrierSet::Name bsn) {
142 return bsn == BarrierSet::G1SATBCTLogging || 166 return bsn == BarrierSet::G1SATBCTLogging ||
143 G1SATBCardTableModRefBS::is_a(bsn); 167 G1SATBCardTableModRefBS::is_a(bsn);
144 } 168 }
152 // above no longer applies. 176 // above no longer applies.
153 void invalidate(MemRegion mr, bool whole_heap = false); 177 void invalidate(MemRegion mr, bool whole_heap = false);
154 178
155 void write_region_work(MemRegion mr) { invalidate(mr); } 179 void write_region_work(MemRegion mr) { invalidate(mr); }
156 void write_ref_array_work(MemRegion mr) { invalidate(mr); } 180 void write_ref_array_work(MemRegion mr) { invalidate(mr); }
157
158
159 }; 181 };
160 182
161 183
162 #endif // INCLUDE_ALL_GCS 184 #endif // INCLUDE_ALL_GCS
163 185