rev 48471 : [mq]: RFE_Access_constantPoolCache_new_decorator
1 /*
2 * Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
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_VM_GC_G1_G1SATBCARDTABLEMODREFBS_INLINE_HPP
26 #define SHARE_VM_GC_G1_G1SATBCARDTABLEMODREFBS_INLINE_HPP
27
28 #include "gc/shared/accessBarrierSupport.inline.hpp"
29 #include "gc/g1/g1SATBCardTableModRefBS.hpp"
30 #include "oops/oop.inline.hpp"
31
32 template <DecoratorSet decorators, typename T>
33 inline void G1SATBCardTableModRefBS::write_ref_field_pre(T* field) {
34 if (HasDecorator<decorators, ARRAYCOPY_DEST_NOT_INITIALIZED>::value ||
35 HasDecorator<decorators, AS_NO_KEEPALIVE>::value) {
36 return;
37 }
38
39 T heap_oop = oopDesc::load_heap_oop(field);
40 if (!oopDesc::is_null(heap_oop)) {
41 enqueue(oopDesc::decode_heap_oop_not_null(heap_oop));
42 }
43 }
44
45 template <DecoratorSet decorators, typename T>
46 inline void G1SATBCardTableLoggingModRefBS::write_ref_field_post(T* field, oop new_val) {
47 volatile jbyte* byte = byte_for(field);
48 if (*byte != g1_young_gen) {
49 // Take a slow path for cards in old
50 write_ref_field_post_slow(byte);
51 }
52 }
53
54 void G1SATBCardTableModRefBS::set_card_claimed(size_t card_index) {
55 jbyte val = _byte_map[card_index];
56 if (val == clean_card_val()) {
57 val = (jbyte)claimed_card_val();
58 } else {
59 val |= (jbyte)claimed_card_val();
60 }
61 _byte_map[card_index] = val;
62 }
63
64 inline void G1SATBCardTableModRefBS::enqueue_if_weak(DecoratorSet decorators, oop value) {
65 assert((decorators & ON_UNKNOWN_OOP_REF) == 0, "Reference strength must be known");
66 const bool on_strong_oop_ref = (decorators & ON_STRONG_OOP_REF) != 0;
67 const bool peek = (decorators & AS_NO_KEEPALIVE) != 0;
68
69 if (!peek && !on_strong_oop_ref && value != NULL) {
70 enqueue(value);
71 }
72 }
73
74 template <DecoratorSet decorators, typename BarrierSetT>
75 template <typename T>
76 inline oop G1SATBCardTableLoggingModRefBS::AccessBarrier<decorators, BarrierSetT>::
77 oop_load_not_in_heap(T* addr) {
78 oop value = ModRef::oop_load_not_in_heap(addr);
79 enqueue_if_weak(decorators, value);
80 return value;
81 }
82
83 template <DecoratorSet decorators, typename BarrierSetT>
84 template <typename T>
85 inline oop G1SATBCardTableLoggingModRefBS::AccessBarrier<decorators, BarrierSetT>::
86 oop_load_in_heap(T* addr) {
87 oop value = ModRef::oop_load_in_heap(addr);
88 enqueue_if_weak(decorators, value);
89 return value;
90 }
91
92 template <DecoratorSet decorators, typename BarrierSetT>
93 inline oop G1SATBCardTableLoggingModRefBS::AccessBarrier<decorators, BarrierSetT>::
94 oop_load_in_heap_at(oop base, ptrdiff_t offset) {
95 oop value = ModRef::oop_load_in_heap_at(base, offset);
96 enqueue_if_weak(AccessBarrierSupport::resolve_possibly_unknown_oop_ref_strength<decorators>(base, offset), value);
97 return value;
98 }
99
100 template <DecoratorSet decorators, typename BarrierSetT>
101 template <typename T>
102 inline void G1SATBCardTableLoggingModRefBS::AccessBarrier<decorators, BarrierSetT>::
103 oop_store_not_in_heap(T* addr, oop new_value) {
104 if (HasDecorator<decorators, IN_CONCURRENT_ROOT>::value) {
105 // For roots not scanned in a safepoint, we have to apply SATB barriers
106 // even for roots.
107 G1SATBCardTableLoggingModRefBS *bs = barrier_set_cast<G1SATBCardTableLoggingModRefBS>(BarrierSet::barrier_set());
108 bs->write_ref_field_pre<decorators>(addr);
109 }
110 Raw::oop_store(addr, new_value);
111 }
112
113 #endif // SHARE_VM_GC_G1_G1SATBCARDTABLEMODREFBS_INLINE_HPP
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