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/dirtyCardQueue.hpp"
29 #include "gc/g1/g1SATBMarkQueueSet.hpp"
30 #include "gc/shared/cardTableBarrierSet.hpp"
31
32 class DirtyCardQueueSet;
33 class CardTable;
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 DirtyCardQueueSet _dirty_card_queue_set;
46
47 static G1BarrierSet* g1_barrier_set() {
48 return barrier_set_cast<G1BarrierSet>(BarrierSet::barrier_set());
49 }
50
51 public:
52 G1BarrierSet(G1CardTable* table);
53 ~G1BarrierSet() { }
54
55 // Add "pre_val" to a set of objects that may have been disconnected from the
56 // pre-marking object graph.
57 static void enqueue(oop pre_val);
58
59 static void enqueue_if_weak(DecoratorSet decorators, oop value);
60
61 template <class T> void write_ref_array_pre_work(T* dst, size_t count);
62 virtual void write_ref_array_pre(oop* dst, size_t count, bool dest_uninitialized);
63 virtual void write_ref_array_pre(narrowOop* dst, size_t count, bool dest_uninitialized);
64
65 template <DecoratorSet decorators, typename T>
71
72 void write_region(MemRegion mr) { invalidate(mr); }
73 void write_ref_array_work(MemRegion mr) { invalidate(mr); }
74
75 template <DecoratorSet decorators, typename T>
76 void write_ref_field_post(T* field, oop new_val);
77 void write_ref_field_post_slow(volatile jbyte* byte);
78
79 virtual void on_thread_create(Thread* thread);
80 virtual void on_thread_destroy(Thread* thread);
81 virtual void on_thread_attach(JavaThread* thread);
82 virtual void on_thread_detach(JavaThread* thread);
83
84 BufferNode::Allocator& satb_mark_queue_buffer_allocator();
85 BufferNode::Allocator& dirty_card_queue_buffer_allocator();
86
87 static G1SATBMarkQueueSet& satb_mark_queue_set() {
88 return g1_barrier_set()->_satb_mark_queue_set;
89 }
90
91 static DirtyCardQueueSet& dirty_card_queue_set() {
92 return g1_barrier_set()->_dirty_card_queue_set;
93 }
94
95 // Callbacks for runtime accesses.
96 template <DecoratorSet decorators, typename BarrierSetT = G1BarrierSet>
97 class AccessBarrier: public ModRefBarrierSet::AccessBarrier<decorators, BarrierSetT> {
98 typedef ModRefBarrierSet::AccessBarrier<decorators, BarrierSetT> ModRef;
99 typedef BarrierSet::AccessBarrier<decorators, BarrierSetT> Raw;
100
101 public:
102 // Needed for loads on non-heap weak references
103 template <typename T>
104 static oop oop_load_not_in_heap(T* addr);
105
106 // Needed for non-heap stores
107 template <typename T>
108 static void oop_store_not_in_heap(T* addr, oop new_value);
109
110 // Needed for weak references
111 static oop oop_load_in_heap_at(oop base, ptrdiff_t offset);
|
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/g1DirtyCardQueue.hpp"
29 #include "gc/g1/g1SATBMarkQueueSet.hpp"
30 #include "gc/shared/cardTableBarrierSet.hpp"
31
32 class CardTable;
33 class G1CardTable;
34
35 // This barrier is specialized to use a logging barrier to support
36 // snapshot-at-the-beginning marking.
37
38 class G1BarrierSet: public CardTableBarrierSet {
39 friend class VMStructs;
40 private:
41 BufferNode::Allocator _satb_mark_queue_buffer_allocator;
42 BufferNode::Allocator _dirty_card_queue_buffer_allocator;
43 G1SATBMarkQueueSet _satb_mark_queue_set;
44 G1DirtyCardQueueSet _dirty_card_queue_set;
45
46 static G1BarrierSet* g1_barrier_set() {
47 return barrier_set_cast<G1BarrierSet>(BarrierSet::barrier_set());
48 }
49
50 public:
51 G1BarrierSet(G1CardTable* table);
52 ~G1BarrierSet() { }
53
54 // Add "pre_val" to a set of objects that may have been disconnected from the
55 // pre-marking object graph.
56 static void enqueue(oop pre_val);
57
58 static void enqueue_if_weak(DecoratorSet decorators, oop value);
59
60 template <class T> void write_ref_array_pre_work(T* dst, size_t count);
61 virtual void write_ref_array_pre(oop* dst, size_t count, bool dest_uninitialized);
62 virtual void write_ref_array_pre(narrowOop* dst, size_t count, bool dest_uninitialized);
63
64 template <DecoratorSet decorators, typename T>
70
71 void write_region(MemRegion mr) { invalidate(mr); }
72 void write_ref_array_work(MemRegion mr) { invalidate(mr); }
73
74 template <DecoratorSet decorators, typename T>
75 void write_ref_field_post(T* field, oop new_val);
76 void write_ref_field_post_slow(volatile jbyte* byte);
77
78 virtual void on_thread_create(Thread* thread);
79 virtual void on_thread_destroy(Thread* thread);
80 virtual void on_thread_attach(JavaThread* thread);
81 virtual void on_thread_detach(JavaThread* thread);
82
83 BufferNode::Allocator& satb_mark_queue_buffer_allocator();
84 BufferNode::Allocator& dirty_card_queue_buffer_allocator();
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);
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