1 /*
2 * Copyright (c) 2013, 2018, Red Hat, Inc. All rights reserved.
3 *
4 * This code is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 only, as
6 * published by the Free Software Foundation.
7 *
8 * This code is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
11 * version 2 for more details (a copy is included in the LICENSE file that
12 * accompanied this code).
13 *
14 * You should have received a copy of the GNU General Public License version
15 * 2 along with this work; if not, write to the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
17 *
18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
19 * or visit www.oracle.com if you need additional information or have any
20 * questions.
21 *
22 */
23
24 #ifndef SHARE_VM_GC_SHENANDOAH_SHENANDOAHBARRIERSET_HPP
25 #define SHARE_VM_GC_SHENANDOAH_SHENANDOAHBARRIERSET_HPP
26
27 #include "gc/shared/accessBarrierSupport.hpp"
28 #include "gc/shared/barrierSet.hpp"
29 #include "gc/shenandoah/shenandoahHeap.hpp"
30 #include "gc/shenandoah/shenandoahSATBMarkQueue.hpp"
31
32 class ShenandoahBarrierSetAssembler;
33
34 class ShenandoahBarrierSet: public BarrierSet {
35 public:
36 enum ArrayCopyStoreValMode {
37 NONE,
38 RESOLVE_BARRIER,
39 EVAC_BARRIER
40 };
41 private:
42
43 static ShenandoahSATBMarkQueueSet _satb_mark_queue_set;
44
45 ShenandoahHeap* _heap;
46
47 public:
48 ShenandoahBarrierSet(ShenandoahHeap* heap);
49
50 static ShenandoahBarrierSetAssembler* assembler();
51
52 inline static ShenandoahBarrierSet* barrier_set() {
53 return barrier_set_cast<ShenandoahBarrierSet>(BarrierSet::barrier_set());
54 }
55
56 static ShenandoahSATBMarkQueueSet& satb_mark_queue_set() {
57 return _satb_mark_queue_set;
58 }
59
60 static bool need_load_reference_barrier(DecoratorSet decorators, BasicType type);
61 static bool need_keep_alive_barrier(DecoratorSet decorators, BasicType type);
62
63 void print_on(outputStream* st) const;
64
65 bool is_a(BarrierSet::Name bsn);
66
67 bool is_aligned(HeapWord* hw);
68
69 template <class T>
70 inline void arraycopy_barrier(T* src, T* dst, size_t count);
71 inline void clone_barrier(oop src);
72 void clone_barrier_runtime(oop src);
73
74 virtual void on_thread_create(Thread* thread);
75 virtual void on_thread_destroy(Thread* thread);
76 virtual void on_thread_attach(JavaThread* thread);
77 virtual void on_thread_detach(JavaThread* thread);
78
79 static inline oop resolve_forwarded_not_null(oop p);
80 static inline oop resolve_forwarded_not_null_mutator(oop p);
81 static inline oop resolve_forwarded(oop p);
82
83 template <DecoratorSet decorators, typename T>
84 inline void satb_barrier(T* field);
85 inline void satb_enqueue(oop value);
86 inline void storeval_barrier(oop obj);
87
88 template <DecoratorSet decorators>
89 inline void keep_alive_if_weak(oop value);
90 inline void keep_alive_if_weak(DecoratorSet decorators, oop value);
91
92 inline void enqueue(oop obj);
93
94 oop load_reference_barrier(oop obj);
95 oop load_reference_barrier_not_null(oop obj);
96
97 template <class T>
98 inline oop load_reference_barrier_mutator(oop obj, T* load_addr);
99
100 private:
101 template <class T>
102 inline void arraycopy_marking(T* src, T* dst, size_t count);
103 template <class T>
104 inline void arraycopy_evacuation(T* src, size_t count);
105 template <class T>
106 inline void arraycopy_update(T* src, size_t count);
107
108 inline void clone_marking(oop src);
109 inline void clone_evacuation(oop src);
110 inline void clone_update(oop src);
111
112 template <class T, bool HAS_FWD, bool EVAC, bool ENQUEUE>
113 inline void arraycopy_work(T* src, size_t count);
114
115 oop load_reference_barrier_impl(oop obj);
116
117 inline bool need_bulk_update(HeapWord* dst);
118 public:
119 // Callbacks for runtime accesses.
120 template <DecoratorSet decorators, typename BarrierSetT = ShenandoahBarrierSet>
121 class AccessBarrier: public BarrierSet::AccessBarrier<decorators, BarrierSetT> {
122 typedef BarrierSet::AccessBarrier<decorators, BarrierSetT> Raw;
123
124 public:
125 // Heap oop accesses. These accessors get resolved when
126 // IN_HEAP is set (e.g. when using the HeapAccess API), it is
127 // an oop_* overload, and the barrier strength is AS_NORMAL.
128 template <typename T>
129 static oop oop_load_in_heap(T* addr);
130 static oop oop_load_in_heap_at(oop base, ptrdiff_t offset);
131
132 template <typename T>
133 static void oop_store_in_heap(T* addr, oop value);
134 static void oop_store_in_heap_at(oop base, ptrdiff_t offset, oop value);
135
136 template <typename T>
137 static oop oop_atomic_cmpxchg_in_heap(oop new_value, T* addr, oop compare_value);
138 static oop oop_atomic_cmpxchg_in_heap_at(oop new_value, oop base, ptrdiff_t offset, oop compare_value);
139
140 template <typename T>
141 static oop oop_atomic_xchg_in_heap(oop new_value, T* addr);
142 static oop oop_atomic_xchg_in_heap_at(oop new_value, oop base, ptrdiff_t offset);
143
144 template <typename T>
145 static bool oop_arraycopy_in_heap(arrayOop src_obj, size_t src_offset_in_bytes, T* src_raw,
146 arrayOop dst_obj, size_t dst_offset_in_bytes, T* dst_raw,
147 size_t length);
148
149 // Clone barrier support
150 static void clone_in_heap(oop src, oop dst, size_t size);
151
152 // Needed for loads on non-heap weak references
153 template <typename T>
154 static oop oop_load_not_in_heap(T* addr);
155
156 // Used for catching bad stores
157 template <typename T>
158 static void oop_store_not_in_heap(T* addr, oop value);
159
160 template <typename T>
161 static oop oop_atomic_cmpxchg_not_in_heap(oop new_value, T* addr, oop compare_value);
162
163 template <typename T>
164 static oop oop_atomic_xchg_not_in_heap(oop new_value, T* addr);
165
166 };
167
168 };
169
170 template<>
171 struct BarrierSet::GetName<ShenandoahBarrierSet> {
172 static const BarrierSet::Name value = BarrierSet::ShenandoahBarrierSet;
173 };
174
175 template<>
176 struct BarrierSet::GetType<BarrierSet::ShenandoahBarrierSet> {
177 typedef ::ShenandoahBarrierSet type;
178 };
179
180 #endif //SHARE_VM_GC_SHENANDOAH_SHENANDOAHBARRIERSET_HPP