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_G1_G1SATBCARDTABLEMODREFBS_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1SATBCARDTABLEMODREFBS_HPP
27
28 #include "gc_implementation/g1/g1RegionToSpaceMapper.hpp"
29 #include "memory/cardTableModRefBS.hpp"
30 #include "memory/memRegion.hpp"
31 #include "oops/oop.hpp"
32 #include "utilities/macros.hpp"
33
34 class DirtyCardQueueSet;
35 class G1SATBCardTableLoggingModRefBS;
36
37 // This barrier is specialized to use a logging barrier to support
38 // snapshot-at-the-beginning marking.
39
40 class G1SATBCardTableModRefBS: public CardTableModRefBS {
41 protected:
42 enum G1CardValues {
43 g1_young_gen = CT_MR_BS_last_reserved << 1
44 };
45
46 G1SATBCardTableModRefBS(MemRegion whole_heap, const BarrierSet::FakeRtti& fake_rtti);
47 ~G1SATBCardTableModRefBS() { }
48
49 public:
166 virtual void resize_covered_region(MemRegion new_region) { ShouldNotReachHere(); }
167
168 void write_ref_field_work(void* field, oop new_val, bool release = false);
169
170 // Can be called from static contexts.
171 static void write_ref_field_static(void* field, oop new_val);
172
173 // NB: if you do a whole-heap invalidation, the "usual invariant" defined
174 // above no longer applies.
175 void invalidate(MemRegion mr, bool whole_heap = false);
176
177 void write_region_work(MemRegion mr) { invalidate(mr); }
178 void write_ref_array_work(MemRegion mr) { invalidate(mr); }
179 };
180
181 template<>
182 struct BarrierSet::GetName<G1SATBCardTableLoggingModRefBS> {
183 static const BarrierSet::Name value = BarrierSet::G1SATBCTLogging;
184 };
185
186 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1SATBCARDTABLEMODREFBS_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_G1_G1SATBCARDTABLEMODREFBS_HPP
26 #define SHARE_VM_GC_G1_G1SATBCARDTABLEMODREFBS_HPP
27
28 #include "gc/g1/g1RegionToSpaceMapper.hpp"
29 #include "gc/shared/cardTableModRefBS.hpp"
30 #include "memory/memRegion.hpp"
31 #include "oops/oop.hpp"
32 #include "utilities/macros.hpp"
33
34 class DirtyCardQueueSet;
35 class G1SATBCardTableLoggingModRefBS;
36
37 // This barrier is specialized to use a logging barrier to support
38 // snapshot-at-the-beginning marking.
39
40 class G1SATBCardTableModRefBS: public CardTableModRefBS {
41 protected:
42 enum G1CardValues {
43 g1_young_gen = CT_MR_BS_last_reserved << 1
44 };
45
46 G1SATBCardTableModRefBS(MemRegion whole_heap, const BarrierSet::FakeRtti& fake_rtti);
47 ~G1SATBCardTableModRefBS() { }
48
49 public:
166 virtual void resize_covered_region(MemRegion new_region) { ShouldNotReachHere(); }
167
168 void write_ref_field_work(void* field, oop new_val, bool release = false);
169
170 // Can be called from static contexts.
171 static void write_ref_field_static(void* field, oop new_val);
172
173 // NB: if you do a whole-heap invalidation, the "usual invariant" defined
174 // above no longer applies.
175 void invalidate(MemRegion mr, bool whole_heap = false);
176
177 void write_region_work(MemRegion mr) { invalidate(mr); }
178 void write_ref_array_work(MemRegion mr) { invalidate(mr); }
179 };
180
181 template<>
182 struct BarrierSet::GetName<G1SATBCardTableLoggingModRefBS> {
183 static const BarrierSet::Name value = BarrierSet::G1SATBCTLogging;
184 };
185
186 #endif // SHARE_VM_GC_G1_G1SATBCARDTABLEMODREFBS_HPP
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