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_GC_SHENANDOAH_SHENANDOAHBARRIERSET_INLINE_HPP
25 #define SHARE_GC_SHENANDOAH_SHENANDOAHBARRIERSET_INLINE_HPP
26
27 #include "gc/shared/barrierSet.hpp"
28 #include "gc/shenandoah/shenandoahAsserts.hpp"
29 #include "gc/shenandoah/shenandoahBarrierSet.hpp"
30 #include "gc/shenandoah/shenandoahCollectionSet.inline.hpp"
31 #include "gc/shenandoah/shenandoahForwarding.inline.hpp"
32 #include "gc/shenandoah/shenandoahHeap.inline.hpp"
33 #include "gc/shenandoah/shenandoahHeapRegion.hpp"
34 #include "gc/shenandoah/shenandoahMarkingContext.inline.hpp"
35 #include "gc/shenandoah/shenandoahThreadLocalData.hpp"
36 #include "memory/iterator.inline.hpp"
37 #include "oops/oop.inline.hpp"
38
39 inline oop ShenandoahBarrierSet::resolve_forwarded_not_null(oop p) {
40 return ShenandoahForwarding::get_forwardee(p);
41 }
42
43 inline oop ShenandoahBarrierSet::resolve_forwarded(oop p) {
44 if (((HeapWord*) p) != NULL) {
45 return resolve_forwarded_not_null(p);
46 } else {
47 return p;
48 }
49 }
50
51 inline void ShenandoahBarrierSet::enqueue(oop obj) {
52 shenandoah_assert_not_forwarded_if(NULL, obj, _heap->is_concurrent_traversal_in_progress());
53 assert(_satb_mark_queue_set.is_active(), "only get here when SATB active");
54
55 // Filter marked objects before hitting the SATB queues. The same predicate would
56 // be used by SATBMQ::filter to eliminate already marked objects downstream, but
57 // filtering here helps to avoid wasteful SATB queueing work to begin with.
58 if (!_heap->requires_marking<false>(obj)) return;
59
60 ShenandoahThreadLocalData::satb_mark_queue(Thread::current()).enqueue_known_active(obj);
61 }
62
63 template <DecoratorSet decorators, typename T>
64 inline void ShenandoahBarrierSet::satb_barrier(T *field) {
65 if (HasDecorator<decorators, IS_DEST_UNINITIALIZED>::value ||
66 HasDecorator<decorators, AS_NO_KEEPALIVE>::value) {
67 return;
68 }
69 if (ShenandoahSATBBarrier && _heap->is_concurrent_mark_in_progress()) {
70 T heap_oop = RawAccess<>::oop_load(field);
102 keep_alive_barrier(value);
103 }
104 }
105
106 template <DecoratorSet decorators>
107 inline void ShenandoahBarrierSet::keep_alive_if_weak(oop value) {
108 assert((decorators & ON_UNKNOWN_OOP_REF) == 0, "Reference strength must be known");
109 if (!HasDecorator<decorators, ON_STRONG_OOP_REF>::value &&
110 !HasDecorator<decorators, AS_NO_KEEPALIVE>::value) {
111 keep_alive_barrier(value);
112 }
113 }
114
115 template <DecoratorSet decorators, typename BarrierSetT>
116 template <typename T>
117 inline oop ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_load_not_in_heap(T* addr) {
118 oop value = Raw::oop_load_not_in_heap(addr);
119 if (value != NULL) {
120 ShenandoahBarrierSet *const bs = ShenandoahBarrierSet::barrier_set();
121 value = bs->load_reference_barrier_native(value, addr);
122 bs->keep_alive_if_weak<decorators>(value);
123 }
124 return value;
125 }
126
127 template <DecoratorSet decorators, typename BarrierSetT>
128 template <typename T>
129 inline oop ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_load_in_heap(T* addr) {
130 oop value = Raw::oop_load_in_heap(addr);
131 if (value != NULL) {
132 ShenandoahBarrierSet *const bs = ShenandoahBarrierSet::barrier_set();
133 value = bs->load_reference_barrier_not_null(value);
134 bs->keep_alive_if_weak<decorators>(value);
135 }
136 return value;
137 }
138
139 template <DecoratorSet decorators, typename BarrierSetT>
140 inline oop ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_load_in_heap_at(oop base, ptrdiff_t offset) {
141 oop value = Raw::oop_load_in_heap_at(base, offset);
142 if (value != NULL) {
143 ShenandoahBarrierSet *const bs = ShenandoahBarrierSet::barrier_set();
168 oop_store_not_in_heap(addr, value);
169 }
170
171 template <DecoratorSet decorators, typename BarrierSetT>
172 inline void ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_store_in_heap_at(oop base, ptrdiff_t offset, oop value) {
173 oop_store_in_heap(AccessInternal::oop_field_addr<decorators>(base, offset), value);
174 }
175
176 template <DecoratorSet decorators, typename BarrierSetT>
177 template <typename T>
178 inline oop ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_cmpxchg_not_in_heap(T* addr, oop compare_value, oop new_value) {
179 ShenandoahBarrierSet* bs = ShenandoahBarrierSet::barrier_set();
180 bs->storeval_barrier(new_value);
181
182 oop res;
183 oop expected = compare_value;
184 do {
185 compare_value = expected;
186 res = Raw::oop_atomic_cmpxchg(addr, compare_value, new_value);
187 expected = res;
188 } while ((compare_value != expected) && (resolve_forwarded(compare_value) == resolve_forwarded(expected)));
189
190 // Note: We don't need a keep-alive-barrier here. We already enqueue any loaded reference for SATB anyway,
191 // because it must be the previous value.
192 if (res != NULL) {
193 res = ShenandoahBarrierSet::barrier_set()->load_reference_barrier_not_null(res);
194 bs->satb_enqueue(res);
195 }
196 return res;
197 }
198
199 template <DecoratorSet decorators, typename BarrierSetT>
200 template <typename T>
201 inline oop ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_cmpxchg_in_heap(T* addr, oop compare_value, oop new_value) {
202 return oop_atomic_cmpxchg_not_in_heap(addr, compare_value, new_value);
203 }
204
205 template <DecoratorSet decorators, typename BarrierSetT>
206 inline oop ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_cmpxchg_in_heap_at(oop base, ptrdiff_t offset, oop compare_value, oop new_value) {
207 return oop_atomic_cmpxchg_in_heap(AccessInternal::oop_field_addr<decorators>(base, offset), compare_value, new_value);
208 }
|
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_GC_SHENANDOAH_SHENANDOAHBARRIERSET_INLINE_HPP
25 #define SHARE_GC_SHENANDOAH_SHENANDOAHBARRIERSET_INLINE_HPP
26
27 #include "gc/shared/barrierSet.hpp"
28 #include "gc/shenandoah/shenandoahAsserts.hpp"
29 #include "gc/shenandoah/shenandoahBarrierSet.hpp"
30 #include "gc/shenandoah/shenandoahCollectionSet.inline.hpp"
31 #include "gc/shenandoah/shenandoahForwarding.inline.hpp"
32 #include "gc/shenandoah/shenandoahHeap.inline.hpp"
33 #include "gc/shenandoah/shenandoahHeapRegion.hpp"
34 #include "gc/shenandoah/shenandoahMarkingContext.inline.hpp"
35 #include "gc/shenandoah/shenandoahSafepoint.hpp"
36 #include "gc/shenandoah/shenandoahThreadLocalData.hpp"
37 #include "memory/iterator.inline.hpp"
38 #include "oops/oop.inline.hpp"
39
40 inline oop ShenandoahBarrierSet::resolve_forwarded_not_null(oop p) {
41 assert(ShenandoahHeap::heap()->in_collection_set(p) ||
42 ShenandoahSafepoint::is_at_shenandoah_safepoint(),
43 "No forwarding oops outside cset");
44 return ShenandoahForwarding::get_forwardee(p);
45 }
46
47 inline oop ShenandoahBarrierSet::resolve_forwarded(oop p) {
48 if (((HeapWord*) p) != NULL) {
49 return resolve_forwarded_not_null(p);
50 } else {
51 return p;
52 }
53 }
54
55 inline oop ShenandoahBarrierSet::resolve_forwarded_checked(oop p) {
56 if (p == NULL) return p;
57 ShenandoahHeap* const heap = ShenandoahHeap::heap();
58 if (heap->in_collection_set(p) ||
59 (heap->is_concurrent_traversal_in_progress() && heap->is_degenerated_gc_in_progress())) {
60 return resolve_forwarded_not_null(p);
61 } else {
62 return p;
63 }
64 }
65
66 inline void ShenandoahBarrierSet::enqueue(oop obj) {
67 shenandoah_assert_not_forwarded_if(NULL, obj, _heap->is_concurrent_traversal_in_progress());
68 assert(_satb_mark_queue_set.is_active(), "only get here when SATB active");
69
70 // Filter marked objects before hitting the SATB queues. The same predicate would
71 // be used by SATBMQ::filter to eliminate already marked objects downstream, but
72 // filtering here helps to avoid wasteful SATB queueing work to begin with.
73 if (!_heap->requires_marking<false>(obj)) return;
74
75 ShenandoahThreadLocalData::satb_mark_queue(Thread::current()).enqueue_known_active(obj);
76 }
77
78 template <DecoratorSet decorators, typename T>
79 inline void ShenandoahBarrierSet::satb_barrier(T *field) {
80 if (HasDecorator<decorators, IS_DEST_UNINITIALIZED>::value ||
81 HasDecorator<decorators, AS_NO_KEEPALIVE>::value) {
82 return;
83 }
84 if (ShenandoahSATBBarrier && _heap->is_concurrent_mark_in_progress()) {
85 T heap_oop = RawAccess<>::oop_load(field);
117 keep_alive_barrier(value);
118 }
119 }
120
121 template <DecoratorSet decorators>
122 inline void ShenandoahBarrierSet::keep_alive_if_weak(oop value) {
123 assert((decorators & ON_UNKNOWN_OOP_REF) == 0, "Reference strength must be known");
124 if (!HasDecorator<decorators, ON_STRONG_OOP_REF>::value &&
125 !HasDecorator<decorators, AS_NO_KEEPALIVE>::value) {
126 keep_alive_barrier(value);
127 }
128 }
129
130 template <DecoratorSet decorators, typename BarrierSetT>
131 template <typename T>
132 inline oop ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_load_not_in_heap(T* addr) {
133 oop value = Raw::oop_load_not_in_heap(addr);
134 if (value != NULL) {
135 ShenandoahBarrierSet *const bs = ShenandoahBarrierSet::barrier_set();
136 value = bs->load_reference_barrier_native(value, addr);
137 if (value != NULL) {
138 bs->keep_alive_if_weak<decorators>(value);
139 }
140 }
141 return value;
142 }
143
144 template <DecoratorSet decorators, typename BarrierSetT>
145 template <typename T>
146 inline oop ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_load_in_heap(T* addr) {
147 oop value = Raw::oop_load_in_heap(addr);
148 if (value != NULL) {
149 ShenandoahBarrierSet *const bs = ShenandoahBarrierSet::barrier_set();
150 value = bs->load_reference_barrier_not_null(value);
151 bs->keep_alive_if_weak<decorators>(value);
152 }
153 return value;
154 }
155
156 template <DecoratorSet decorators, typename BarrierSetT>
157 inline oop ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_load_in_heap_at(oop base, ptrdiff_t offset) {
158 oop value = Raw::oop_load_in_heap_at(base, offset);
159 if (value != NULL) {
160 ShenandoahBarrierSet *const bs = ShenandoahBarrierSet::barrier_set();
185 oop_store_not_in_heap(addr, value);
186 }
187
188 template <DecoratorSet decorators, typename BarrierSetT>
189 inline void ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_store_in_heap_at(oop base, ptrdiff_t offset, oop value) {
190 oop_store_in_heap(AccessInternal::oop_field_addr<decorators>(base, offset), value);
191 }
192
193 template <DecoratorSet decorators, typename BarrierSetT>
194 template <typename T>
195 inline oop ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_cmpxchg_not_in_heap(T* addr, oop compare_value, oop new_value) {
196 ShenandoahBarrierSet* bs = ShenandoahBarrierSet::barrier_set();
197 bs->storeval_barrier(new_value);
198
199 oop res;
200 oop expected = compare_value;
201 do {
202 compare_value = expected;
203 res = Raw::oop_atomic_cmpxchg(addr, compare_value, new_value);
204 expected = res;
205 } while ((compare_value != expected) && (resolve_forwarded_checked(compare_value) == resolve_forwarded_checked(expected)));
206
207 // Note: We don't need a keep-alive-barrier here. We already enqueue any loaded reference for SATB anyway,
208 // because it must be the previous value.
209 if (res != NULL) {
210 res = ShenandoahBarrierSet::barrier_set()->load_reference_barrier_not_null(res);
211 bs->satb_enqueue(res);
212 }
213 return res;
214 }
215
216 template <DecoratorSet decorators, typename BarrierSetT>
217 template <typename T>
218 inline oop ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_cmpxchg_in_heap(T* addr, oop compare_value, oop new_value) {
219 return oop_atomic_cmpxchg_not_in_heap(addr, compare_value, new_value);
220 }
221
222 template <DecoratorSet decorators, typename BarrierSetT>
223 inline oop ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_cmpxchg_in_heap_at(oop base, ptrdiff_t offset, oop compare_value, oop new_value) {
224 return oop_atomic_cmpxchg_in_heap(AccessInternal::oop_field_addr<decorators>(base, offset), compare_value, new_value);
225 }
|