Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/parallelScavenge/cardTableExtension.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 | fdde661c8e06 |
| children | bca17e38de00 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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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_GC_IMPLEMENTATION_PARALLELSCAVENGE_CARDTABLEEXTENSION_HPP |
| 26 #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_CARDTABLEEXTENSION_HPP | |
| 27 | |
| 28 #include "memory/cardTableModRefBS.hpp" | |
| 29 | |
| 0 | 30 class MutableSpace; |
| 31 class ObjectStartArray; | |
| 32 class PSPromotionManager; | |
| 33 class GCTaskQueue; | |
| 34 | |
| 35 class CardTableExtension : public CardTableModRefBS { | |
| 36 private: | |
| 37 // Support methods for resizing the card table. | |
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38 // resize_commit_uncommit() returns true if the pages were committed or |
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39 // uncommitted |
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40 bool resize_commit_uncommit(int changed_region, MemRegion new_region); |
| 0 | 41 void resize_update_card_table_entries(int changed_region, |
| 42 MemRegion new_region); | |
| 43 void resize_update_committed_table(int changed_region, MemRegion new_region); | |
| 44 void resize_update_covered_table(int changed_region, MemRegion new_region); | |
| 45 | |
| 46 protected: | |
| 47 | |
| 48 static void verify_all_young_refs_precise_helper(MemRegion mr); | |
| 49 | |
| 50 public: | |
| 51 enum ExtendedCardValue { | |
| 52 youngergen_card = CardTableModRefBS::CT_MR_BS_last_reserved + 1, | |
| 53 verify_card = CardTableModRefBS::CT_MR_BS_last_reserved + 5 | |
| 54 }; | |
| 55 | |
| 56 CardTableExtension(MemRegion whole_heap, int max_covered_regions) : | |
| 57 CardTableModRefBS(whole_heap, max_covered_regions) { } | |
| 58 | |
| 59 // Too risky for the 4/10/02 putback | |
| 60 // BarrierSet::Name kind() { return BarrierSet::CardTableExtension; } | |
| 61 | |
| 62 // Scavenge support | |
| 63 void scavenge_contents(ObjectStartArray* start_array, | |
| 64 MutableSpace* sp, | |
| 65 HeapWord* space_top, | |
| 66 PSPromotionManager* pm); | |
| 67 | |
| 68 void scavenge_contents_parallel(ObjectStartArray* start_array, | |
| 69 MutableSpace* sp, | |
| 70 HeapWord* space_top, | |
| 71 PSPromotionManager* pm, | |
| 72 uint stripe_number); | |
| 73 | |
| 74 // Verification | |
| 75 static void verify_all_young_refs_imprecise(); | |
| 76 static void verify_all_young_refs_precise(); | |
| 77 | |
| 78 bool addr_is_marked_imprecise(void *addr); | |
| 79 bool addr_is_marked_precise(void *addr); | |
| 80 | |
| 81 void set_card_newgen(void* addr) { jbyte* p = byte_for(addr); *p = verify_card; } | |
| 82 | |
| 83 // Testers for entries | |
| 84 static bool card_is_dirty(int value) { return value == dirty_card; } | |
| 85 static bool card_is_newgen(int value) { return value == youngergen_card; } | |
| 86 static bool card_is_clean(int value) { return value == clean_card; } | |
| 87 static bool card_is_verify(int value) { return value == verify_card; } | |
| 88 | |
| 89 // Card marking | |
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90 void inline_write_ref_field_gc(void* field, oop new_val) { |
| 0 | 91 jbyte* byte = byte_for(field); |
| 92 *byte = youngergen_card; | |
| 93 } | |
| 94 | |
| 95 // Adaptive size policy support | |
| 96 // Allows adjustment of the base and size of the covered regions | |
| 97 void resize_covered_region(MemRegion new_region); | |
| 98 // Finds the covered region to resize based on the start address | |
| 99 // of the covered regions. | |
| 100 void resize_covered_region_by_start(MemRegion new_region); | |
| 101 // Finds the covered region to resize based on the end address | |
| 102 // of the covered regions. | |
| 103 void resize_covered_region_by_end(int changed_region, MemRegion new_region); | |
| 104 // Finds the lowest start address of a covered region that is | |
| 105 // previous (i.e., lower index) to the covered region with index "ind". | |
| 106 HeapWord* lowest_prev_committed_start(int ind) const; | |
| 107 | |
| 108 #ifdef ASSERT | |
| 109 | |
| 110 bool is_valid_card_address(jbyte* addr) { | |
| 111 return (addr >= _byte_map) && (addr < _byte_map + _byte_map_size); | |
| 112 } | |
| 113 | |
| 114 #endif // ASSERT | |
| 115 }; | |
| 1972 | 116 |
| 117 #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_CARDTABLEEXTENSION_HPP |