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/g1DirtyCardQueue.hpp"
29 #include "gc/g1/g1SATBMarkQueueSet.hpp"
30 #include "gc/shared/cardTable.hpp"
31 #include "gc/shared/cardTableBarrierSet.hpp"
32 #include "gc/shared/bufferNode.hpp"
33
34 class G1CardTable;
35
36 // This barrier is specialized to use a logging barrier to support
37 // snapshot-at-the-beginning marking.
38
39 class G1BarrierSet: public CardTableBarrierSet {
40 friend class VMStructs;
41 private:
42 BufferNode::Allocator _satb_mark_queue_buffer_allocator;
43 BufferNode::Allocator _dirty_card_queue_buffer_allocator;
44 G1SATBMarkQueueSet _satb_mark_queue_set;
45 G1DirtyCardQueueSet _dirty_card_queue_set;
46
47 static G1BarrierSet* g1_barrier_set() {
48 return barrier_set_cast<G1BarrierSet>(BarrierSet::barrier_set());
74 inline void write_region(MemRegion mr);
75 void write_region(JavaThread* thread, MemRegion mr);
76
77 template <DecoratorSet decorators, typename T>
78 void write_ref_field_post(T* field);
79 void write_ref_field_post_slow(volatile CardValue* byte);
80
81 virtual void on_thread_create(Thread* thread);
82 virtual void on_thread_destroy(Thread* thread);
83 virtual void on_thread_attach(Thread* thread);
84 virtual void on_thread_detach(Thread* thread);
85
86 static G1SATBMarkQueueSet& satb_mark_queue_set() {
87 return g1_barrier_set()->_satb_mark_queue_set;
88 }
89
90 static G1DirtyCardQueueSet& dirty_card_queue_set() {
91 return g1_barrier_set()->_dirty_card_queue_set;
92 }
93
94 // Callbacks for runtime accesses.
95 template <DecoratorSet decorators, typename BarrierSetT = G1BarrierSet>
96 class AccessBarrier: public ModRefBarrierSet::AccessBarrier<decorators, BarrierSetT> {
97 typedef ModRefBarrierSet::AccessBarrier<decorators, BarrierSetT> ModRef;
98 typedef BarrierSet::AccessBarrier<decorators, BarrierSetT> Raw;
99
100 public:
101 // Needed for loads on non-heap weak references
102 template <typename T>
103 static oop oop_load_not_in_heap(T* addr);
104
105 // Needed for non-heap stores
106 template <typename T>
107 static void oop_store_not_in_heap(T* addr, oop new_value);
108
109 // Needed for weak references
110 static oop oop_load_in_heap_at(oop base, ptrdiff_t offset);
111
112 // Defensive: will catch weak oops at addresses in heap
113 template <typename T>
|
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/g1DirtyCardQueue.hpp"
29 #include "gc/g1/g1HeapRegion.hpp"
30 #include "gc/g1/g1SATBMarkQueueSet.hpp"
31 #include "gc/shared/cardTable.hpp"
32 #include "gc/shared/cardTableBarrierSet.hpp"
33 #include "gc/shared/bufferNode.hpp"
34
35 class G1CardTable;
36
37 // This barrier is specialized to use a logging barrier to support
38 // snapshot-at-the-beginning marking.
39
40 class G1BarrierSet: public CardTableBarrierSet {
41 friend class VMStructs;
42 private:
43 BufferNode::Allocator _satb_mark_queue_buffer_allocator;
44 BufferNode::Allocator _dirty_card_queue_buffer_allocator;
45 G1SATBMarkQueueSet _satb_mark_queue_set;
46 G1DirtyCardQueueSet _dirty_card_queue_set;
47
48 static G1BarrierSet* g1_barrier_set() {
49 return barrier_set_cast<G1BarrierSet>(BarrierSet::barrier_set());
75 inline void write_region(MemRegion mr);
76 void write_region(JavaThread* thread, MemRegion mr);
77
78 template <DecoratorSet decorators, typename T>
79 void write_ref_field_post(T* field);
80 void write_ref_field_post_slow(volatile CardValue* byte);
81
82 virtual void on_thread_create(Thread* thread);
83 virtual void on_thread_destroy(Thread* thread);
84 virtual void on_thread_attach(Thread* thread);
85 virtual void on_thread_detach(Thread* thread);
86
87 static G1SATBMarkQueueSet& satb_mark_queue_set() {
88 return g1_barrier_set()->_satb_mark_queue_set;
89 }
90
91 static G1DirtyCardQueueSet& dirty_card_queue_set() {
92 return g1_barrier_set()->_dirty_card_queue_set;
93 }
94
95 virtual uint grain_shift() { return G1HeapRegion::LogOfHRGrainBytes; }
96
97 // Callbacks for runtime accesses.
98 template <DecoratorSet decorators, typename BarrierSetT = G1BarrierSet>
99 class AccessBarrier: public ModRefBarrierSet::AccessBarrier<decorators, BarrierSetT> {
100 typedef ModRefBarrierSet::AccessBarrier<decorators, BarrierSetT> ModRef;
101 typedef BarrierSet::AccessBarrier<decorators, BarrierSetT> Raw;
102
103 public:
104 // Needed for loads on non-heap weak references
105 template <typename T>
106 static oop oop_load_not_in_heap(T* addr);
107
108 // Needed for non-heap stores
109 template <typename T>
110 static void oop_store_not_in_heap(T* addr, oop new_value);
111
112 // Needed for weak references
113 static oop oop_load_in_heap_at(oop base, ptrdiff_t offset);
114
115 // Defensive: will catch weak oops at addresses in heap
116 template <typename T>
|