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
|
/*
* Copyright (C) 2016 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 B3StackSlot_h
#define B3StackSlot_h
#if ENABLE(B3_JIT)
#include "B3SparseCollection.h"
#include <limits.h>
#include <wtf/FastMalloc.h>
#include <wtf/Noncopyable.h>
#include <wtf/PrintStream.h>
namespace JSC { namespace B3 {
class Procedure;
namespace Air {
class StackSlot;
} // namespace Air
class StackSlot {
WTF_MAKE_NONCOPYABLE(StackSlot);
WTF_MAKE_FAST_ALLOCATED;
public:
~StackSlot();
unsigned byteSize() const { return m_byteSize; }
unsigned index() const { return m_index; }
// This gets assigned at the end of compilation. But, you can totally pin stack slots. Use the
// set method to do that.
intptr_t offsetFromFP() const { return m_offsetFromFP; }
// Note that this is meaningless unless the stack slot is Locked.
void setOffsetFromFP(intptr_t value)
{
m_offsetFromFP = value;
}
void dump(PrintStream&) const;
void deepDump(PrintStream&) const;
private:
friend class Air::StackSlot;
friend class Procedure;
friend class SparseCollection<StackSlot>;
StackSlot(unsigned byteSize);
unsigned m_index { UINT_MAX };
unsigned m_byteSize { 0 };
intptr_t m_offsetFromFP { 0 };
};
class DeepStackSlotDump {
public:
DeepStackSlotDump(const StackSlot* slot)
: m_slot(slot)
{
}
void dump(PrintStream& out) const
{
if (m_slot)
m_slot->deepDump(out);
else
out.print("<null>");
}
private:
const StackSlot* m_slot;
};
inline DeepStackSlotDump deepDump(const StackSlot* slot)
{
return DeepStackSlotDump(slot);
}
} } // namespace JSC::B3
#endif // ENABLE(B3_JIT)
#endif // B3StackSlot_h
|
