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_GC_G1_G1BARRIERSET_HPP
26 #define SHARE_GC_G1_G1BARRIERSET_HPP
27
28 #include "gc/g1/g1SATBMarkQueueSet.hpp"
29 #include "gc/shared/bufferNode.hpp"
30 #include "gc/shared/cardTable.hpp"
31 #include "gc/shared/cardTableBarrierSet.hpp"
32 #include "runtime/atomic.hpp"
33
34 class G1CardTable;
35 class Thread;
36
37 // This barrier set is specialized to manage two card tables:
38 // * one the mutator is currently working on ("card table")
39 // * one the refinement threads or GC during pause are working on ("refinement table")
40 //
41 // The card table acts like a regular card table where the mutator dirties cards
42 // containing potentially interesting references.
43 //
44 // When the amount of dirty cards on the card table exceeds a threshold, G1 swaps
45 // the card tables and has the refinement threads reduce them by "refining"
46 // them.
47 // I.e. refinement looks at all dirty cards on the refinement table, and updates
99
100 template <DecoratorSet decorators, typename T>
101 void write_ref_field_pre(T* field);
102
103 virtual void write_region(MemRegion mr);
104
105 template <DecoratorSet decorators = DECORATORS_NONE, typename T>
106 void write_ref_field_post(T* field);
107
108 virtual void on_thread_create(Thread* thread);
109 virtual void on_thread_destroy(Thread* thread);
110 virtual void on_thread_attach(Thread* thread);
111 virtual void on_thread_detach(Thread* thread);
112
113 static G1SATBMarkQueueSet& satb_mark_queue_set() {
114 return g1_barrier_set()->_satb_mark_queue_set;
115 }
116
117 virtual void print_on(outputStream* st) const;
118
119 // Callbacks for runtime accesses.
120 template <DecoratorSet decorators, typename BarrierSetT = G1BarrierSet>
121 class AccessBarrier: public CardTableBarrierSet::AccessBarrier<decorators, BarrierSetT> {
122 typedef CardTableBarrierSet::AccessBarrier<decorators, BarrierSetT> CardTableBS;
123 typedef BarrierSet::AccessBarrier<decorators, BarrierSetT> Raw;
124
125 public:
126 // Needed for loads on non-heap weak references
127 template <typename T>
128 static oop oop_load_not_in_heap(T* addr);
129
130 // Needed for non-heap stores
131 template <typename T>
132 static void oop_store_not_in_heap(T* addr, oop new_value);
133
134 // Needed for weak references
135 static oop oop_load_in_heap_at(oop base, ptrdiff_t offset);
136
137 // Defensive: will catch weak oops at addresses in heap
138 template <typename T>
|
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_GC_G1_G1BARRIERSET_HPP
26 #define SHARE_GC_G1_G1BARRIERSET_HPP
27
28 #include "gc/g1/g1HeapRegion.hpp"
29 #include "gc/g1/g1SATBMarkQueueSet.hpp"
30 #include "gc/shared/bufferNode.hpp"
31 #include "gc/shared/cardTable.hpp"
32 #include "gc/shared/cardTableBarrierSet.hpp"
33 #include "runtime/atomic.hpp"
34
35 class G1CardTable;
36 class Thread;
37
38 // This barrier set is specialized to manage two card tables:
39 // * one the mutator is currently working on ("card table")
40 // * one the refinement threads or GC during pause are working on ("refinement table")
41 //
42 // The card table acts like a regular card table where the mutator dirties cards
43 // containing potentially interesting references.
44 //
45 // When the amount of dirty cards on the card table exceeds a threshold, G1 swaps
46 // the card tables and has the refinement threads reduce them by "refining"
47 // them.
48 // I.e. refinement looks at all dirty cards on the refinement table, and updates
100
101 template <DecoratorSet decorators, typename T>
102 void write_ref_field_pre(T* field);
103
104 virtual void write_region(MemRegion mr);
105
106 template <DecoratorSet decorators = DECORATORS_NONE, typename T>
107 void write_ref_field_post(T* field);
108
109 virtual void on_thread_create(Thread* thread);
110 virtual void on_thread_destroy(Thread* thread);
111 virtual void on_thread_attach(Thread* thread);
112 virtual void on_thread_detach(Thread* thread);
113
114 static G1SATBMarkQueueSet& satb_mark_queue_set() {
115 return g1_barrier_set()->_satb_mark_queue_set;
116 }
117
118 virtual void print_on(outputStream* st) const;
119
120 virtual uint grain_shift() { return G1HeapRegion::LogOfHRGrainBytes; }
121
122 // Callbacks for runtime accesses.
123 template <DecoratorSet decorators, typename BarrierSetT = G1BarrierSet>
124 class AccessBarrier: public CardTableBarrierSet::AccessBarrier<decorators, BarrierSetT> {
125 typedef CardTableBarrierSet::AccessBarrier<decorators, BarrierSetT> CardTableBS;
126 typedef BarrierSet::AccessBarrier<decorators, BarrierSetT> Raw;
127
128 public:
129 // Needed for loads on non-heap weak references
130 template <typename T>
131 static oop oop_load_not_in_heap(T* addr);
132
133 // Needed for non-heap stores
134 template <typename T>
135 static void oop_store_not_in_heap(T* addr, oop new_value);
136
137 // Needed for weak references
138 static oop oop_load_in_heap_at(oop base, ptrdiff_t offset);
139
140 // Defensive: will catch weak oops at addresses in heap
141 template <typename T>
|