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
|
/*
* Copyright (C) 2013 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef CallFrameInlines_h
#define CallFrameInlines_h
#include "CallFrame.h"
#include "CodeBlock.h"
namespace JSC {
inline uint32_t CallFrame::Location::encode(CallFrame::Location::TypeTag tag, uint32_t bits)
{
#if USE(JSVALUE64)
ASSERT(!(bits & s_shiftedMask));
ASSERT(!(tag & ~s_mask));
return bits | (tag << s_shift);
#else
ASSERT(!(tag & ~s_mask));
if (tag & CodeOriginIndexTag)
bits = (bits << s_shift);
ASSERT(!(bits & s_mask));
bits |= tag;
return bits;
#endif
}
inline uint32_t CallFrame::Location::decode(uint32_t bits)
{
#if USE(JSVALUE64)
return bits & ~s_shiftedMask;
#else
if (isCodeOriginIndex(bits))
return bits >> s_shift;
return bits & ~s_mask;
#endif
}
#if USE(JSVALUE64)
inline uint32_t CallFrame::Location::encodeAsBytecodeOffset(uint32_t bits)
{
uint32_t encodedBits = encode(BytecodeLocationTag, bits);
ASSERT(isBytecodeLocation(encodedBits));
return encodedBits;
}
#else
inline uint32_t CallFrame::Location::encodeAsBytecodeInstruction(Instruction* instruction)
{
uint32_t encodedBits = encode(BytecodeLocationTag, reinterpret_cast<uint32_t>(instruction));
ASSERT(isBytecodeLocation(encodedBits));
return encodedBits;
}
#endif
inline uint32_t CallFrame::Location::encodeAsCodeOriginIndex(uint32_t bits)
{
uint32_t encodedBits = encode(CodeOriginIndexTag, bits);
ASSERT(isCodeOriginIndex(encodedBits));
return encodedBits;
}
inline bool CallFrame::Location::isBytecodeLocation(uint32_t bits)
{
return !isCodeOriginIndex(bits);
}
inline bool CallFrame::Location::isCodeOriginIndex(uint32_t bits)
{
#if USE(JSVALUE64)
TypeTag tag = static_cast<TypeTag>(bits >> s_shift);
return !!(tag & CodeOriginIndexTag);
#else
return !!(bits & CodeOriginIndexTag);
#endif
}
inline bool CallFrame::hasLocationAsBytecodeOffset() const
{
return Location::isBytecodeLocation(locationAsRawBits());
}
inline bool CallFrame::hasLocationAsCodeOriginIndex() const
{
return Location::isCodeOriginIndex(locationAsRawBits());
}
inline unsigned CallFrame::locationAsRawBits() const
{
return this[JSStack::ArgumentCount].tag();
}
inline void CallFrame::setLocationAsRawBits(unsigned bits)
{
this[JSStack::ArgumentCount].tag() = static_cast<int32_t>(bits);
}
#if USE(JSVALUE64)
inline unsigned CallFrame::locationAsBytecodeOffset() const
{
ASSERT(hasLocationAsBytecodeOffset());
ASSERT(codeBlock());
return Location::decode(locationAsRawBits());
}
inline void CallFrame::setLocationAsBytecodeOffset(unsigned offset)
{
ASSERT(codeBlock());
setLocationAsRawBits(Location::encodeAsBytecodeOffset(offset));
ASSERT(hasLocationAsBytecodeOffset());
}
#endif // USE(JSVALUE64)
inline unsigned CallFrame::locationAsCodeOriginIndex() const
{
ASSERT(hasLocationAsCodeOriginIndex());
ASSERT(codeBlock());
return Location::decode(locationAsRawBits());
}
inline JSValue CallFrame::uncheckedActivation() const
{
CodeBlock* codeBlock = this->codeBlock();
RELEASE_ASSERT(codeBlock->needsActivation());
VirtualRegister activationRegister = codeBlock->activationRegister();
return registers()[activationRegister.offset()].jsValue();
}
} // namespace JSC
#endif // CallFrameInlines_h
|
