Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/sparsePRT.hpp @ 1995:8df09fb45352
7005259: CMS: BubbleUpRef asserts referent(obj)->is_oop() failed: Enqueued a bad referent
Summary: Relaxed the assert by allowing NULL referents when discovery may be concurrent.
Reviewed-by: johnc, jcoomes
| author | ysr |
|---|---|
| date | Thu, 09 Dec 2010 09:22:57 -0800 |
| parents | f95d63e2154a |
| children | 97ba643ea3ed |
| rev | line source |
|---|---|
| 342 | 1 /* |
| 1972 | 2 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. |
| 342 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1261
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1261
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1261
diff
changeset
|
21 * questions. |
| 342 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_SPARSEPRT_HPP |
| 26 #define SHARE_VM_GC_IMPLEMENTATION_G1_SPARSEPRT_HPP | |
| 27 | |
| 28 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" | |
| 29 #include "gc_implementation/g1/heapRegion.hpp" | |
| 30 #include "memory/allocation.hpp" | |
| 31 #include "memory/cardTableModRefBS.hpp" | |
| 32 #include "runtime/mutex.hpp" | |
| 33 #include "utilities/globalDefinitions.hpp" | |
| 34 | |
| 342 | 35 // Sparse remembered set for a heap region (the "owning" region). Maps |
| 36 // indices of other regions to short sequences of cards in the other region | |
| 37 // that might contain pointers into the owner region. | |
| 38 | |
| 39 // These tables only expand while they are accessed in parallel -- | |
| 40 // deletions may be done in single-threaded code. This allows us to allow | |
| 41 // unsynchronized reads/iterations, as long as expansions caused by | |
| 42 // insertions only enqueue old versions for deletions, but do not delete | |
| 43 // old versions synchronously. | |
| 44 | |
|
549
fe3d7c11b4b7
6700941: G1: allocation spec missing for some G1 classes
apetrusenko
parents:
342
diff
changeset
|
45 class SparsePRTEntry: public CHeapObj { |
| 342 | 46 public: |
| 47 enum SomePublicConstants { | |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1045
diff
changeset
|
48 NullEntry = -1, |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1045
diff
changeset
|
49 UnrollFactor = 4 |
| 342 | 50 }; |
| 51 private: | |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
52 RegionIdx_t _region_ind; |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
53 int _next_index; |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1045
diff
changeset
|
54 CardIdx_t _cards[1]; |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1045
diff
changeset
|
55 // WARNING: Don't put any data members beyond this line. Card array has, in fact, variable length. |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1045
diff
changeset
|
56 // It should always be the last data member. |
| 342 | 57 public: |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1045
diff
changeset
|
58 // Returns the size of the entry, used for entry allocation. |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1045
diff
changeset
|
59 static size_t size() { return sizeof(SparsePRTEntry) + sizeof(CardIdx_t) * (cards_num() - 1); } |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1045
diff
changeset
|
60 // Returns the size of the card array. |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1045
diff
changeset
|
61 static int cards_num() { |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1045
diff
changeset
|
62 // The number of cards should be a multiple of 4, because that's our current |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1045
diff
changeset
|
63 // unrolling factor. |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1045
diff
changeset
|
64 static const int s = MAX2<int>(G1RSetSparseRegionEntries & ~(UnrollFactor - 1), UnrollFactor); |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1045
diff
changeset
|
65 return s; |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1045
diff
changeset
|
66 } |
| 342 | 67 |
| 68 // Set the region_ind to the given value, and delete all cards. | |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
69 inline void init(RegionIdx_t region_ind); |
| 342 | 70 |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
71 RegionIdx_t r_ind() const { return _region_ind; } |
| 342 | 72 bool valid_entry() const { return r_ind() >= 0; } |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
73 void set_r_ind(RegionIdx_t rind) { _region_ind = rind; } |
| 342 | 74 |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
75 int next_index() const { return _next_index; } |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
76 int* next_index_addr() { return &_next_index; } |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
77 void set_next_index(int ni) { _next_index = ni; } |
| 342 | 78 |
| 79 // Returns "true" iff the entry contains the given card index. | |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
80 inline bool contains_card(CardIdx_t card_index) const; |
| 342 | 81 |
| 82 // Returns the number of non-NULL card entries. | |
| 83 inline int num_valid_cards() const; | |
| 84 | |
| 85 // Requires that the entry not contain the given card index. If there is | |
| 86 // space available, add the given card index to the entry and return | |
| 87 // "true"; otherwise, return "false" to indicate that the entry is full. | |
| 88 enum AddCardResult { | |
| 89 overflow, | |
| 90 found, | |
| 91 added | |
| 92 }; | |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
93 inline AddCardResult add_card(CardIdx_t card_index); |
| 342 | 94 |
| 95 // Copy the current entry's cards into "cards". | |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
96 inline void copy_cards(CardIdx_t* cards) const; |
| 342 | 97 // Copy the current entry's cards into the "_card" array of "e." |
| 98 inline void copy_cards(SparsePRTEntry* e) const; | |
| 99 | |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
100 inline CardIdx_t card(int i) const { return _cards[i]; } |
| 342 | 101 }; |
| 102 | |
| 103 | |
| 104 class RSHashTable : public CHeapObj { | |
| 105 | |
| 106 friend class RSHashTableIter; | |
| 107 | |
| 108 enum SomePrivateConstants { | |
| 109 NullEntry = -1 | |
| 110 }; | |
| 111 | |
| 112 size_t _capacity; | |
| 113 size_t _capacity_mask; | |
| 114 size_t _occupied_entries; | |
| 115 size_t _occupied_cards; | |
| 116 | |
| 117 SparsePRTEntry* _entries; | |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
118 int* _buckets; |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
119 int _free_region; |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
120 int _free_list; |
| 342 | 121 |
| 122 // Requires that the caller hold a lock preventing parallel modifying | |
| 123 // operations, and that the the table be less than completely full. If | |
| 124 // an entry for "region_ind" is already in the table, finds it and | |
| 125 // returns its address; otherwise returns "NULL." | |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
126 SparsePRTEntry* entry_for_region_ind(RegionIdx_t region_ind) const; |
| 342 | 127 |
| 128 // Requires that the caller hold a lock preventing parallel modifying | |
| 129 // operations, and that the the table be less than completely full. If | |
| 130 // an entry for "region_ind" is already in the table, finds it and | |
| 131 // returns its address; otherwise allocates, initializes, inserts and | |
| 132 // returns a new entry for "region_ind". | |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
133 SparsePRTEntry* entry_for_region_ind_create(RegionIdx_t region_ind); |
| 342 | 134 |
| 135 // Returns the index of the next free entry in "_entries". | |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
136 int alloc_entry(); |
| 342 | 137 // Declares the entry "fi" to be free. (It must have already been |
| 138 // deleted from any bucket lists. | |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
139 void free_entry(int fi); |
| 342 | 140 |
| 141 public: | |
| 142 RSHashTable(size_t capacity); | |
| 143 ~RSHashTable(); | |
| 144 | |
| 145 // Attempts to ensure that the given card_index in the given region is in | |
| 146 // the sparse table. If successful (because the card was already | |
| 147 // present, or because it was successfullly added) returns "true". | |
| 148 // Otherwise, returns "false" to indicate that the addition would | |
| 149 // overflow the entry for the region. The caller must transfer these | |
| 150 // entries to a larger-capacity representation. | |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
151 bool add_card(RegionIdx_t region_id, CardIdx_t card_index); |
| 342 | 152 |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
153 bool get_cards(RegionIdx_t region_id, CardIdx_t* cards); |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1045
diff
changeset
|
154 |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
155 bool delete_entry(RegionIdx_t region_id); |
| 342 | 156 |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
157 bool contains_card(RegionIdx_t region_id, CardIdx_t card_index) const; |
| 342 | 158 |
| 159 void add_entry(SparsePRTEntry* e); | |
| 160 | |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1045
diff
changeset
|
161 SparsePRTEntry* get_entry(RegionIdx_t region_id); |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1045
diff
changeset
|
162 |
| 342 | 163 void clear(); |
| 164 | |
| 165 size_t capacity() const { return _capacity; } | |
| 166 size_t capacity_mask() const { return _capacity_mask; } | |
| 167 size_t occupied_entries() const { return _occupied_entries; } | |
| 168 size_t occupied_cards() const { return _occupied_cards; } | |
| 169 size_t mem_size() const; | |
| 170 | |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1045
diff
changeset
|
171 SparsePRTEntry* entry(int i) const { return (SparsePRTEntry*)((char*)_entries + SparsePRTEntry::size() * i); } |
| 342 | 172 |
| 173 void print(); | |
| 174 }; | |
| 175 | |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
176 // ValueObj because will be embedded in HRRS iterator. |
|
549
fe3d7c11b4b7
6700941: G1: allocation spec missing for some G1 classes
apetrusenko
parents:
342
diff
changeset
|
177 class RSHashTableIter VALUE_OBJ_CLASS_SPEC { |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
178 int _tbl_ind; // [-1, 0.._rsht->_capacity) |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
179 int _bl_ind; // [-1, 0.._rsht->_capacity) |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1045
diff
changeset
|
180 short _card_ind; // [0..SparsePRTEntry::cards_num()) |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
181 RSHashTable* _rsht; |
| 342 | 182 |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
183 // If the bucket list pointed to by _bl_ind contains a card, sets |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
184 // _bl_ind to the index of that entry, and returns the card. |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
185 // Otherwise, returns SparseEntry::NullEntry. |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
186 CardIdx_t find_first_card_in_list(); |
| 342 | 187 |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
188 // Computes the proper card index for the card whose offset in the |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
189 // current region (as indicated by _bl_ind) is "ci". |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
190 // This is subject to errors when there is iteration concurrent with |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
191 // modification, but these errors should be benign. |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
192 size_t compute_card_ind(CardIdx_t ci); |
| 342 | 193 |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
194 public: |
|
1884
9f4848ebbabd
6992189: G1: inconsistent base used in sparse rem set iterator
tonyp
parents:
1552
diff
changeset
|
195 RSHashTableIter() : |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
196 _tbl_ind(RSHashTable::NullEntry), |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
197 _bl_ind(RSHashTable::NullEntry), |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1045
diff
changeset
|
198 _card_ind((SparsePRTEntry::cards_num() - 1)), |
|
1884
9f4848ebbabd
6992189: G1: inconsistent base used in sparse rem set iterator
tonyp
parents:
1552
diff
changeset
|
199 _rsht(NULL) {} |
| 342 | 200 |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
201 void init(RSHashTable* rsht) { |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
202 _rsht = rsht; |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
203 _tbl_ind = -1; // So that first increment gets to 0. |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
204 _bl_ind = RSHashTable::NullEntry; |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1045
diff
changeset
|
205 _card_ind = (SparsePRTEntry::cards_num() - 1); |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
206 } |
| 342 | 207 |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
208 bool has_next(size_t& card_index); |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
209 }; |
| 342 | 210 |
| 211 // Concurrent accesss to a SparsePRT must be serialized by some external | |
| 212 // mutex. | |
| 213 | |
| 214 class SparsePRTIter; | |
| 215 | |
|
549
fe3d7c11b4b7
6700941: G1: allocation spec missing for some G1 classes
apetrusenko
parents:
342
diff
changeset
|
216 class SparsePRT VALUE_OBJ_CLASS_SPEC { |
| 342 | 217 // Iterations are done on the _cur hash table, since they only need to |
| 218 // see entries visible at the start of a collection pause. | |
| 219 // All other operations are done using the _next hash table. | |
| 220 RSHashTable* _cur; | |
| 221 RSHashTable* _next; | |
| 222 | |
| 223 HeapRegion* _hr; | |
| 224 | |
| 225 enum SomeAdditionalPrivateConstants { | |
| 226 InitialCapacity = 16 | |
| 227 }; | |
| 228 | |
| 229 void expand(); | |
| 230 | |
| 231 bool _expanded; | |
| 232 | |
| 233 bool expanded() { return _expanded; } | |
| 234 void set_expanded(bool b) { _expanded = b; } | |
| 235 | |
| 236 SparsePRT* _next_expanded; | |
| 237 | |
| 238 SparsePRT* next_expanded() { return _next_expanded; } | |
| 239 void set_next_expanded(SparsePRT* nxt) { _next_expanded = nxt; } | |
| 240 | |
| 241 static SparsePRT* _head_expanded_list; | |
| 242 | |
| 243 public: | |
| 244 SparsePRT(HeapRegion* hr); | |
| 245 | |
| 246 ~SparsePRT(); | |
| 247 | |
| 248 size_t occupied() const { return _next->occupied_cards(); } | |
| 249 size_t mem_size() const; | |
| 250 | |
| 251 // Attempts to ensure that the given card_index in the given region is in | |
| 252 // the sparse table. If successful (because the card was already | |
| 253 // present, or because it was successfullly added) returns "true". | |
| 254 // Otherwise, returns "false" to indicate that the addition would | |
| 255 // overflow the entry for the region. The caller must transfer these | |
| 256 // entries to a larger-capacity representation. | |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
257 bool add_card(RegionIdx_t region_id, CardIdx_t card_index); |
| 342 | 258 |
| 259 // If the table hold an entry for "region_ind", Copies its | |
| 260 // cards into "cards", which must be an array of length at least | |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1045
diff
changeset
|
261 // "SparePRTEntry::cards_num()", and returns "true"; otherwise, |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1045
diff
changeset
|
262 // returns "false". |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
263 bool get_cards(RegionIdx_t region_ind, CardIdx_t* cards); |
| 342 | 264 |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1045
diff
changeset
|
265 // Return the pointer to the entry associated with the given region. |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1045
diff
changeset
|
266 SparsePRTEntry* get_entry(RegionIdx_t region_ind); |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1045
diff
changeset
|
267 |
| 342 | 268 // If there is an entry for "region_ind", removes it and return "true"; |
| 269 // otherwise returns "false." | |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
270 bool delete_entry(RegionIdx_t region_ind); |
| 342 | 271 |
| 272 // Clear the table, and reinitialize to initial capacity. | |
| 273 void clear(); | |
| 274 | |
| 275 // Ensure that "_cur" and "_next" point to the same table. | |
| 276 void cleanup(); | |
| 277 | |
| 278 // Clean up all tables on the expanded list. Called single threaded. | |
| 279 static void cleanup_all(); | |
|
617
0db4adb6e914
6810698: G1: two small bugs in the sparse remembered sets
tonyp
parents:
549
diff
changeset
|
280 RSHashTable* cur() const { return _cur; } |
| 342 | 281 |
| 282 void init_iterator(SparsePRTIter* sprt_iter); | |
| 283 | |
| 284 static void add_to_expanded_list(SparsePRT* sprt); | |
| 285 static SparsePRT* get_from_expanded_list(); | |
| 286 | |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
628
diff
changeset
|
287 bool contains_card(RegionIdx_t region_id, CardIdx_t card_index) const { |
| 342 | 288 return _next->contains_card(region_id, card_index); |
| 289 } | |
| 290 }; | |
| 291 | |
| 292 | |
|
1884
9f4848ebbabd
6992189: G1: inconsistent base used in sparse rem set iterator
tonyp
parents:
1552
diff
changeset
|
293 class SparsePRTIter: public RSHashTableIter { |
| 342 | 294 public: |
| 295 void init(const SparsePRT* sprt) { | |
|
617
0db4adb6e914
6810698: G1: two small bugs in the sparse remembered sets
tonyp
parents:
549
diff
changeset
|
296 RSHashTableIter::init(sprt->cur()); |
| 342 | 297 } |
| 298 bool has_next(size_t& card_index) { | |
| 299 return RSHashTableIter::has_next(card_index); | |
| 300 } | |
| 301 }; | |
| 1972 | 302 |
| 303 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_SPARSEPRT_HPP |