Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/parallelScavenge/cardTableExtension.hpp @ 1562:dfe27f03244a
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author | trims |
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date | Tue, 01 Jun 2010 11:48:33 -0700 |
parents | c18cbe5936b8 |
children | fdde661c8e06 |
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0 | 1 /* |
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2 * Copyright (c) 2001, 2008, 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 | |
25 class MutableSpace; | |
26 class ObjectStartArray; | |
27 class PSPromotionManager; | |
28 class GCTaskQueue; | |
29 | |
30 class CardTableExtension : public CardTableModRefBS { | |
31 private: | |
32 // Support methods for resizing the card table. | |
33 void resize_commit_uncommit(int changed_region, MemRegion new_region); | |
34 void resize_update_card_table_entries(int changed_region, | |
35 MemRegion new_region); | |
36 void resize_update_committed_table(int changed_region, MemRegion new_region); | |
37 void resize_update_covered_table(int changed_region, MemRegion new_region); | |
38 | |
39 protected: | |
40 | |
41 static void verify_all_young_refs_precise_helper(MemRegion mr); | |
42 | |
43 public: | |
44 enum ExtendedCardValue { | |
45 youngergen_card = CardTableModRefBS::CT_MR_BS_last_reserved + 1, | |
46 verify_card = CardTableModRefBS::CT_MR_BS_last_reserved + 5 | |
47 }; | |
48 | |
49 CardTableExtension(MemRegion whole_heap, int max_covered_regions) : | |
50 CardTableModRefBS(whole_heap, max_covered_regions) { } | |
51 | |
52 // Too risky for the 4/10/02 putback | |
53 // BarrierSet::Name kind() { return BarrierSet::CardTableExtension; } | |
54 | |
55 // Scavenge support | |
56 void scavenge_contents(ObjectStartArray* start_array, | |
57 MutableSpace* sp, | |
58 HeapWord* space_top, | |
59 PSPromotionManager* pm); | |
60 | |
61 void scavenge_contents_parallel(ObjectStartArray* start_array, | |
62 MutableSpace* sp, | |
63 HeapWord* space_top, | |
64 PSPromotionManager* pm, | |
65 uint stripe_number); | |
66 | |
67 // Verification | |
68 static void verify_all_young_refs_imprecise(); | |
69 static void verify_all_young_refs_precise(); | |
70 | |
71 bool addr_is_marked_imprecise(void *addr); | |
72 bool addr_is_marked_precise(void *addr); | |
73 | |
74 void set_card_newgen(void* addr) { jbyte* p = byte_for(addr); *p = verify_card; } | |
75 | |
76 // Testers for entries | |
77 static bool card_is_dirty(int value) { return value == dirty_card; } | |
78 static bool card_is_newgen(int value) { return value == youngergen_card; } | |
79 static bool card_is_clean(int value) { return value == clean_card; } | |
80 static bool card_is_verify(int value) { return value == verify_card; } | |
81 | |
82 // Card marking | |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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83 void inline_write_ref_field_gc(void* field, oop new_val) { |
0 | 84 jbyte* byte = byte_for(field); |
85 *byte = youngergen_card; | |
86 } | |
87 | |
88 // Adaptive size policy support | |
89 // Allows adjustment of the base and size of the covered regions | |
90 void resize_covered_region(MemRegion new_region); | |
91 // Finds the covered region to resize based on the start address | |
92 // of the covered regions. | |
93 void resize_covered_region_by_start(MemRegion new_region); | |
94 // Finds the covered region to resize based on the end address | |
95 // of the covered regions. | |
96 void resize_covered_region_by_end(int changed_region, MemRegion new_region); | |
97 // Finds the lowest start address of a covered region that is | |
98 // previous (i.e., lower index) to the covered region with index "ind". | |
99 HeapWord* lowest_prev_committed_start(int ind) const; | |
100 | |
101 #ifdef ASSERT | |
102 | |
103 bool is_valid_card_address(jbyte* addr) { | |
104 return (addr >= _byte_map) && (addr < _byte_map + _byte_map_size); | |
105 } | |
106 | |
107 #endif // ASSERT | |
108 }; |