1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
// Copyright 2019 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_OBJECTS_TAGGED_FIELD_INL_H_
#define V8_OBJECTS_TAGGED_FIELD_INL_H_
#include "src/objects/tagged-field.h"
#include "src/common/ptr-compr-inl.h"
namespace v8 {
namespace internal {
// static
template <typename T, int kFieldOffset>
Address TaggedField<T, kFieldOffset>::address(HeapObject host, int offset) {
return host.address() + kFieldOffset + offset;
}
// static
template <typename T, int kFieldOffset>
Tagged_t* TaggedField<T, kFieldOffset>::location(HeapObject host, int offset) {
return reinterpret_cast<Tagged_t*>(address(host, offset));
}
// static
template <typename T, int kFieldOffset>
template <typename TOnHeapAddress>
Address TaggedField<T, kFieldOffset>::tagged_to_full(
TOnHeapAddress on_heap_addr, Tagged_t tagged_value) {
#ifdef V8_COMPRESS_POINTERS
if (kIsSmi) {
return DecompressTaggedSigned(tagged_value);
} else if (kIsHeapObject) {
return DecompressTaggedPointer(on_heap_addr, tagged_value);
} else {
return DecompressTaggedAny(on_heap_addr, tagged_value);
}
#else
return tagged_value;
#endif
}
// static
template <typename T, int kFieldOffset>
Tagged_t TaggedField<T, kFieldOffset>::full_to_tagged(Address value) {
#ifdef V8_COMPRESS_POINTERS
return CompressTagged(value);
#else
return value;
#endif
}
// static
template <typename T, int kFieldOffset>
T TaggedField<T, kFieldOffset>::load(HeapObject host, int offset) {
Tagged_t value = *location(host, offset);
return T(tagged_to_full(host.ptr(), value));
}
// static
template <typename T, int kFieldOffset>
T TaggedField<T, kFieldOffset>::load(Isolate* isolate, HeapObject host,
int offset) {
Tagged_t value = *location(host, offset);
return T(tagged_to_full(isolate, value));
}
// static
template <typename T, int kFieldOffset>
void TaggedField<T, kFieldOffset>::store(HeapObject host, T value) {
#ifdef V8_CONCURRENT_MARKING
Relaxed_Store(host, value);
#else
*location(host) = full_to_tagged(value.ptr());
#endif
}
// static
template <typename T, int kFieldOffset>
void TaggedField<T, kFieldOffset>::store(HeapObject host, int offset, T value) {
#ifdef V8_CONCURRENT_MARKING
Relaxed_Store(host, offset, value);
#else
*location(host, offset) = full_to_tagged(value.ptr());
#endif
}
// static
template <typename T, int kFieldOffset>
T TaggedField<T, kFieldOffset>::Relaxed_Load(HeapObject host, int offset) {
AtomicTagged_t value = AsAtomicTagged::Relaxed_Load(location(host, offset));
return T(tagged_to_full(host.ptr(), value));
}
// static
template <typename T, int kFieldOffset>
T TaggedField<T, kFieldOffset>::Relaxed_Load(Isolate* isolate, HeapObject host,
int offset) {
AtomicTagged_t value = AsAtomicTagged::Relaxed_Load(location(host, offset));
return T(tagged_to_full(isolate, value));
}
// static
template <typename T, int kFieldOffset>
void TaggedField<T, kFieldOffset>::Relaxed_Store(HeapObject host, T value) {
AsAtomicTagged::Relaxed_Store(location(host), full_to_tagged(value.ptr()));
}
// static
template <typename T, int kFieldOffset>
void TaggedField<T, kFieldOffset>::Relaxed_Store(HeapObject host, int offset,
T value) {
AsAtomicTagged::Relaxed_Store(location(host, offset),
full_to_tagged(value.ptr()));
}
// static
template <typename T, int kFieldOffset>
T TaggedField<T, kFieldOffset>::Acquire_Load(HeapObject host, int offset) {
AtomicTagged_t value = AsAtomicTagged::Acquire_Load(location(host, offset));
return T(tagged_to_full(host.ptr(), value));
}
// static
template <typename T, int kFieldOffset>
T TaggedField<T, kFieldOffset>::Acquire_Load(Isolate* isolate, HeapObject host,
int offset) {
AtomicTagged_t value = AsAtomicTagged::Acquire_Load(location(host, offset));
return T(tagged_to_full(isolate, value));
}
// static
template <typename T, int kFieldOffset>
void TaggedField<T, kFieldOffset>::Release_Store(HeapObject host, T value) {
AsAtomicTagged::Release_Store(location(host), full_to_tagged(value.ptr()));
}
// static
template <typename T, int kFieldOffset>
void TaggedField<T, kFieldOffset>::Release_Store(HeapObject host, int offset,
T value) {
AsAtomicTagged::Release_Store(location(host, offset),
full_to_tagged(value.ptr()));
}
// static
template <typename T, int kFieldOffset>
Tagged_t TaggedField<T, kFieldOffset>::Release_CompareAndSwap(HeapObject host,
T old, T value) {
Tagged_t old_value = full_to_tagged(old.ptr());
Tagged_t new_value = full_to_tagged(value.ptr());
Tagged_t result = AsAtomicTagged::Release_CompareAndSwap(
location(host), old_value, new_value);
return result;
}
} // namespace internal
} // namespace v8
#endif // V8_OBJECTS_TAGGED_FIELD_INL_H_
|
