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
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
|
//===--- RuntimeValueWitness.h ---===//
// Swift Language Bytecode Layouts Runtime Implementation
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
//
// Implementations of runtime determined value witness functions
//
//===----------------------------------------------------------------------===//
#ifndef SWIFT_BYTECODE_LAYOUTS_H
#define SWIFT_BYTECODE_LAYOUTS_H
#include "swift/Runtime/Metadata.h"
#include <cstdint>
#include <vector>
namespace swift {
enum class RefCountingKind : uint8_t {
End = 0x00,
Error = 0x01,
NativeStrong = 0x02,
NativeUnowned = 0x03,
NativeWeak = 0x04,
Unknown = 0x05,
UnknownUnowned = 0x06,
UnknownWeak = 0x07,
Bridge = 0x08,
Block = 0x09,
ObjC = 0x0a,
Custom = 0x0b,
Metatype = 0x0c,
Generic = 0x0d,
Existential = 0x0e,
Resilient = 0x0f,
SinglePayloadEnumSimple = 0x10,
SinglePayloadEnumFN = 0x11,
SinglePayloadEnumFNResolved = 0x12,
SinglePayloadEnumGeneric = 0x13,
MultiPayloadEnumFN = 0x14,
MultiPayloadEnumFNResolved = 0x15,
MultiPayloadEnumGeneric = 0x16,
// Skip = 0x80,
// We may use the MSB as flag that a count follows,
// so all following values are reserved
// Reserved: 0x81 - 0xFF
};
struct LayoutStringReader1 {
const uint8_t *layoutStr;
template <typename T>
inline T readBytes() {
T returnVal;
memcpy(&returnVal, layoutStr, sizeof(T));
layoutStr += sizeof(T);
return returnVal;
}
template <typename... T>
inline void readBytes(T&... result) {
uintptr_t additionalOffset = 0;
([&] {
memcpy(&result, layoutStr + additionalOffset, sizeof(T));
additionalOffset += sizeof(T);
}(), ...);
layoutStr += additionalOffset;
}
template<typename T, typename F>
inline T modify(F &&f) {
LayoutStringReader1 readerCopy = *this;
T res = f(readerCopy);
layoutStr = readerCopy.layoutStr;
return res;
}
template<typename F>
inline void modify(F &&f) {
LayoutStringReader1 readerCopy = *this;
f(readerCopy);
layoutStr = readerCopy.layoutStr;
}
template <typename T>
inline T peekBytes(size_t peekOffset = 0) const {
T returnVal;
memcpy(&returnVal, layoutStr + peekOffset, sizeof(T));
return returnVal;
}
inline void skip(size_t n) { layoutStr += n; }
inline uintptr_t getAbsolute() {
return (uintptr_t) layoutStr;
}
};
struct LayoutStringReader {
const uint8_t *layoutStr;
size_t offset;
template <typename T>
inline T readBytes() {
T returnVal;
memcpy(&returnVal, layoutStr + offset, sizeof(T));
offset += sizeof(T);
return returnVal;
}
template <typename... T>
inline void readBytes(T&... result) {
uintptr_t additionalOffset = 0;
([&] {
memcpy(&result, layoutStr + offset + additionalOffset, sizeof(T));
additionalOffset += sizeof(T);
}(), ...);
offset += additionalOffset;
}
template<typename T, typename F>
inline T modify(F &&f) {
LayoutStringReader readerCopy = *this;
T res = f(readerCopy);
offset = readerCopy.offset;
return res;
}
template<typename F>
inline void modify(F &&f) {
LayoutStringReader readerCopy = *this;
f(readerCopy);
offset = readerCopy.offset;
}
template <typename T>
inline T peekBytes(size_t peekOffset = 0) const {
T returnVal;
memcpy(&returnVal, layoutStr + offset + peekOffset, sizeof(T));
return returnVal;
}
inline void skip(size_t n) { offset += n; }
inline uintptr_t getAbsolute() {
return (uintptr_t) layoutStr + offset;
}
};
struct LayoutStringWriter {
uint8_t *layoutStr;
size_t offset;
template <typename T>
inline void writeBytes(T value) {
memcpy(layoutStr + offset, &value, sizeof(T));
offset += sizeof(T);
}
inline void skip(size_t n) { offset += n; }
};
SWIFT_RUNTIME_EXPORT
void swift_generic_destroy(swift::OpaqueValue *address,
const Metadata *metadata);
SWIFT_RUNTIME_EXPORT
swift::OpaqueValue *swift_generic_assignWithCopy(swift::OpaqueValue *dest,
swift::OpaqueValue *src,
const Metadata *metadata);
SWIFT_RUNTIME_EXPORT
swift::OpaqueValue *swift_generic_assignWithTake(swift::OpaqueValue *dest,
swift::OpaqueValue *src,
const Metadata *metadata);
SWIFT_RUNTIME_EXPORT
swift::OpaqueValue *swift_generic_initWithCopy(swift::OpaqueValue *dest,
swift::OpaqueValue *src,
const Metadata *metadata);
SWIFT_RUNTIME_EXPORT
swift::OpaqueValue *swift_generic_initWithTake(swift::OpaqueValue *dest,
swift::OpaqueValue *src,
const Metadata *metadata);
SWIFT_RUNTIME_EXPORT
swift::OpaqueValue *
swift_generic_initializeBufferWithCopyOfBuffer(swift::ValueBuffer *dest,
swift::ValueBuffer *src,
const Metadata *metadata);
SWIFT_RUNTIME_EXPORT
unsigned swift_singletonEnum_getEnumTag(swift::OpaqueValue *address,
const Metadata *metadata);
SWIFT_RUNTIME_EXPORT
void swift_singletonEnum_destructiveInjectEnumTag(swift::OpaqueValue *address,
unsigned tag,
const Metadata *metadata);
SWIFT_RUNTIME_EXPORT
unsigned swift_enumSimple_getEnumTag(swift::OpaqueValue *address,
const Metadata *metadata);
SWIFT_RUNTIME_EXPORT
void swift_enumSimple_destructiveInjectEnumTag(swift::OpaqueValue *address,
unsigned tag,
const Metadata *metadata);
SWIFT_RUNTIME_EXPORT
unsigned swift_enumFn_getEnumTag(swift::OpaqueValue *address,
const Metadata *metadata);
SWIFT_RUNTIME_EXPORT
unsigned swift_multiPayloadEnumGeneric_getEnumTag(swift::OpaqueValue *address,
const Metadata *metadata);
SWIFT_RUNTIME_EXPORT
void swift_multiPayloadEnumGeneric_destructiveInjectEnumTag(
swift::OpaqueValue *address, unsigned tag, const Metadata *metadata);
SWIFT_RUNTIME_EXPORT
unsigned swift_singlePayloadEnumGeneric_getEnumTag(swift::OpaqueValue *address,
const Metadata *metadata);
SWIFT_RUNTIME_EXPORT
void swift_singlePayloadEnumGeneric_destructiveInjectEnumTag(
swift::OpaqueValue *address, unsigned tag, const Metadata *metadata);
SWIFT_RUNTIME_EXPORT
void swift_generic_instantiateLayoutString(const uint8_t *layoutStr,
Metadata *type);
void swift_resolve_resilientAccessors(uint8_t *layoutStr,
size_t layoutStrOffset,
const uint8_t *fieldLayoutStr,
const Metadata *fieldType);
void swift_generic_arrayDestroy(swift::OpaqueValue *addr,
size_t count,
size_t stride,
const Metadata *metadata);
void swift_generic_arrayInitWithCopy(swift::OpaqueValue *dest,
swift::OpaqueValue *src,
size_t count,
size_t stride,
const Metadata *metadata);
extern "C" void swift_generic_arrayAssignWithCopy(swift::OpaqueValue *dest,
swift::OpaqueValue *src,
size_t count, size_t stride,
const Metadata *metadata);
constexpr size_t layoutStringHeaderSize = sizeof(uint64_t) + sizeof(size_t);
} // namespace swift
#endif // SWIFT_BYTECODE_LAYOUTS_H
|
