1/*
2 * Copyright (C) 2016 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#if ENABLE(B3_JIT)
29
30#include "B3SparseCollection.h"
31#include <limits.h>
32#include <wtf/FastMalloc.h>
33#include <wtf/Noncopyable.h>
34#include <wtf/PrintStream.h>
35
36namespace JSC { namespace B3 {
37
38class Procedure;
39
40namespace Air {
41class StackSlot;
42} // namespace Air
43
44class StackSlot {
45 WTF_MAKE_NONCOPYABLE(StackSlot);
46 WTF_MAKE_FAST_ALLOCATED;
47
48public:
49 ~StackSlot();
50
51 unsigned byteSize() const { return m_byteSize; }
52 unsigned index() const { return m_index; }
53
54 // This gets assigned at the end of compilation. But, you can totally pin stack slots. Use the
55 // set method to do that.
56 intptr_t offsetFromFP() const { return m_offsetFromFP; }
57
58 // Note that this is meaningless unless the stack slot is Locked.
59 void setOffsetFromFP(intptr_t value)
60 {
61 m_offsetFromFP = value;
62 }
63
64 void dump(PrintStream&) const;
65 void deepDump(PrintStream&) const;
66
67private:
68 friend class Air::StackSlot;
69 friend class Procedure;
70 friend class SparseCollection<StackSlot>;
71
72 StackSlot(unsigned byteSize);
73
74 unsigned m_index { UINT_MAX };
75 unsigned m_byteSize { 0 };
76 intptr_t m_offsetFromFP { 0 };
77};
78
79class DeepStackSlotDump {
80public:
81 DeepStackSlotDump(const StackSlot* slot)
82 : m_slot(slot)
83 {
84 }
85
86 void dump(PrintStream& out) const
87 {
88 if (m_slot)
89 m_slot->deepDump(out);
90 else
91 out.print("<null>");
92 }
93
94private:
95 const StackSlot* m_slot;
96};
97
98inline DeepStackSlotDump deepDump(const StackSlot* slot)
99{
100 return DeepStackSlotDump(slot);
101}
102
103} } // namespace JSC::B3
104
105#endif // ENABLE(B3_JIT)
106