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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
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
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.
38 // resize_commit_uncommit() returns true if the pages were committed or
39 // uncommitted
40 bool resize_commit_uncommit(int changed_region, MemRegion new_region);
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);
104 // of the covered regions.
105 void resize_covered_region_by_end(int changed_region, MemRegion new_region);
106 // Finds the lowest start address of a covered region that is
107 // previous (i.e., lower index) to the covered region with index "ind".
108 HeapWord* lowest_prev_committed_start(int ind) const;
109
110 #ifdef ASSERT
111
112 bool is_valid_card_address(jbyte* addr) {
113 return (addr >= _byte_map) && (addr < _byte_map + _byte_map_size);
114 }
115
116 #endif // ASSERT
117 };
118
119 template<>
120 struct BarrierSet::GetName<CardTableExtension> {
121 static const BarrierSet::Name value = BarrierSet::CardTableExtension;
122 };
123
124 #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_CARDTABLEEXTENSION_HPP
|
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_GC_PARALLEL_CARDTABLEEXTENSION_HPP
26 #define SHARE_VM_GC_PARALLEL_CARDTABLEEXTENSION_HPP
27
28 #include "gc/shared/cardTableModRefBS.hpp"
29
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.
38 // resize_commit_uncommit() returns true if the pages were committed or
39 // uncommitted
40 bool resize_commit_uncommit(int changed_region, MemRegion new_region);
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);
104 // of the covered regions.
105 void resize_covered_region_by_end(int changed_region, MemRegion new_region);
106 // Finds the lowest start address of a covered region that is
107 // previous (i.e., lower index) to the covered region with index "ind".
108 HeapWord* lowest_prev_committed_start(int ind) const;
109
110 #ifdef ASSERT
111
112 bool is_valid_card_address(jbyte* addr) {
113 return (addr >= _byte_map) && (addr < _byte_map + _byte_map_size);
114 }
115
116 #endif // ASSERT
117 };
118
119 template<>
120 struct BarrierSet::GetName<CardTableExtension> {
121 static const BarrierSet::Name value = BarrierSet::CardTableExtension;
122 };
123
124 #endif // SHARE_VM_GC_PARALLEL_CARDTABLEEXTENSION_HPP
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