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annotate src/share/vm/memory/cardTableRS.hpp @ 1972:f95d63e2154a
6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg
| author | stefank |
|---|---|
| date | Tue, 23 Nov 2010 13:22:55 -0800 |
| parents | c18cbe5936b8 |
| children | c48ad6ab8bdf |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_MEMORY_CARDTABLERS_HPP |
| 26 #define SHARE_VM_MEMORY_CARDTABLERS_HPP | |
| 27 | |
| 28 #include "memory/cardTableModRefBS.hpp" | |
| 29 #include "memory/genRemSet.hpp" | |
| 30 #include "memory/memRegion.hpp" | |
| 31 | |
| 0 | 32 class Space; |
| 33 class OopsInGenClosure; | |
| 34 class DirtyCardToOopClosure; | |
| 35 | |
| 36 // This kind of "GenRemSet" uses a card table both as shared data structure | |
| 37 // for a mod ref barrier set and for the rem set information. | |
| 38 | |
| 39 class CardTableRS: public GenRemSet { | |
| 40 friend class VMStructs; | |
| 41 // Below are private classes used in impl. | |
| 42 friend class VerifyCTSpaceClosure; | |
| 43 friend class ClearNoncleanCardWrapper; | |
| 44 | |
| 45 static jbyte clean_card_val() { | |
| 46 return CardTableModRefBS::clean_card; | |
| 47 } | |
| 48 | |
| 49 static bool | |
| 50 card_is_dirty_wrt_gen_iter(jbyte cv) { | |
| 51 return CardTableModRefBS::card_is_dirty_wrt_gen_iter(cv); | |
| 52 } | |
| 53 | |
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54 CardTableModRefBSForCTRS* _ct_bs; |
| 0 | 55 |
| 56 virtual void younger_refs_in_space_iterate(Space* sp, OopsInGenClosure* cl); | |
| 57 | |
| 58 void verify_space(Space* s, HeapWord* gen_start); | |
| 59 | |
| 60 enum ExtendedCardValue { | |
| 61 youngergen_card = CardTableModRefBS::CT_MR_BS_last_reserved + 1, | |
| 62 // These are for parallel collection. | |
| 63 // There are three P (parallel) youngergen card values. In general, this | |
| 64 // needs to be more than the number of generations (including the perm | |
| 65 // gen) that might have younger_refs_do invoked on them separately. So | |
| 66 // if we add more gens, we have to add more values. | |
| 67 youngergenP1_card = CardTableModRefBS::CT_MR_BS_last_reserved + 2, | |
| 68 youngergenP2_card = CardTableModRefBS::CT_MR_BS_last_reserved + 3, | |
| 69 youngergenP3_card = CardTableModRefBS::CT_MR_BS_last_reserved + 4, | |
| 70 cur_youngergen_and_prev_nonclean_card = | |
| 71 CardTableModRefBS::CT_MR_BS_last_reserved + 5 | |
| 72 }; | |
| 73 | |
| 74 // An array that contains, for each generation, the card table value last | |
| 75 // used as the current value for a younger_refs_do iteration of that | |
| 76 // portion of the table. (The perm gen is index 0; other gens are at | |
| 77 // their level plus 1. They youngest gen is in the table, but will | |
| 78 // always have the value "clean_card".) | |
| 79 jbyte* _last_cur_val_in_gen; | |
| 80 | |
| 81 jbyte _cur_youngergen_card_val; | |
| 82 | |
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83 int _regions_to_iterate; |
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84 |
| 0 | 85 jbyte cur_youngergen_card_val() { |
| 86 return _cur_youngergen_card_val; | |
| 87 } | |
| 88 void set_cur_youngergen_card_val(jbyte v) { | |
| 89 _cur_youngergen_card_val = v; | |
| 90 } | |
| 91 bool is_prev_youngergen_card_val(jbyte v) { | |
| 92 return | |
| 93 youngergen_card <= v && | |
| 94 v < cur_youngergen_and_prev_nonclean_card && | |
| 95 v != _cur_youngergen_card_val; | |
| 96 } | |
| 97 // Return a youngergen_card_value that is not currently in use. | |
| 98 jbyte find_unused_youngergenP_card_value(); | |
| 99 | |
| 100 public: | |
| 101 CardTableRS(MemRegion whole_heap, int max_covered_regions); | |
| 102 | |
| 103 // *** GenRemSet functions. | |
| 104 GenRemSet::Name rs_kind() { return GenRemSet::CardTable; } | |
| 105 | |
| 106 CardTableRS* as_CardTableRS() { return this; } | |
| 107 | |
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108 CardTableModRefBS* ct_bs() { return _ct_bs; } |
| 0 | 109 |
| 110 // Override. | |
| 111 void prepare_for_younger_refs_iterate(bool parallel); | |
| 112 | |
| 113 // Card table entries are cleared before application; "blk" is | |
| 114 // responsible for dirtying if the oop is still older-to-younger after | |
| 115 // closure application. | |
| 116 void younger_refs_iterate(Generation* g, OopsInGenClosure* blk); | |
| 117 | |
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118 void inline_write_ref_field_gc(void* field, oop new_val) { |
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119 jbyte* byte = _ct_bs->byte_for(field); |
| 0 | 120 *byte = youngergen_card; |
| 121 } | |
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122 void write_ref_field_gc_work(void* field, oop new_val) { |
| 0 | 123 inline_write_ref_field_gc(field, new_val); |
| 124 } | |
| 125 | |
| 126 // Override. Might want to devirtualize this in the same fashion as | |
| 127 // above. Ensures that the value of the card for field says that it's | |
| 128 // a younger card in the current collection. | |
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129 virtual void write_ref_field_gc_par(void* field, oop new_val); |
| 0 | 130 |
| 131 void resize_covered_region(MemRegion new_region); | |
| 132 | |
| 133 bool is_aligned(HeapWord* addr) { | |
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134 return _ct_bs->is_card_aligned(addr); |
| 0 | 135 } |
| 136 | |
| 137 void verify(); | |
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138 void verify_aligned_region_empty(MemRegion mr); |
| 0 | 139 |
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140 void clear(MemRegion mr) { _ct_bs->clear(mr); } |
| 0 | 141 void clear_into_younger(Generation* gen, bool clear_perm); |
| 142 | |
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143 void invalidate(MemRegion mr, bool whole_heap = false) { |
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144 _ct_bs->invalidate(mr, whole_heap); |
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145 } |
| 0 | 146 void invalidate_or_clear(Generation* gen, bool younger, bool perm); |
| 147 | |
| 148 static uintx ct_max_alignment_constraint() { | |
| 149 return CardTableModRefBS::ct_max_alignment_constraint(); | |
| 150 } | |
| 151 | |
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152 jbyte* byte_for(void* p) { return _ct_bs->byte_for(p); } |
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153 jbyte* byte_after(void* p) { return _ct_bs->byte_after(p); } |
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154 HeapWord* addr_for(jbyte* p) { return _ct_bs->addr_for(p); } |
| 0 | 155 |
| 156 bool is_prev_nonclean_card_val(jbyte v) { | |
| 157 return | |
| 158 youngergen_card <= v && | |
| 159 v <= cur_youngergen_and_prev_nonclean_card && | |
| 160 v != _cur_youngergen_card_val; | |
| 161 } | |
| 162 | |
| 163 static bool youngergen_may_have_been_dirty(jbyte cv) { | |
| 164 return cv == CardTableRS::cur_youngergen_and_prev_nonclean_card; | |
| 165 } | |
| 166 | |
| 167 }; | |
| 1972 | 168 |
| 169 #endif // SHARE_VM_MEMORY_CARDTABLERS_HPP |