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
|
/*
* Copyright (C) 2019 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.
*/
#pragma once
#if ENABLE(WEBASSEMBLY)
#include "BytecodeConventions.h"
#include "InstructionStream.h"
#include "MacroAssemblerCodeRef.h"
#include "WasmLLIntTierUpCounter.h"
#include "WasmOps.h"
#include <wtf/HashMap.h>
#include <wtf/Vector.h>
namespace JSC {
class JITCode;
class LLIntOffsetsExtractor;
template<typename Traits>
class BytecodeGeneratorBase;
namespace Wasm {
class Signature;
struct GeneratorTraits;
// FIXME: Consider merging this with LLIntCallee
// https://bugs.webkit.org/show_bug.cgi?id=203691
class FunctionCodeBlock {
WTF_MAKE_FAST_ALLOCATED;
WTF_MAKE_NONCOPYABLE(FunctionCodeBlock);
friend BytecodeGeneratorBase<GeneratorTraits>;
friend LLIntOffsetsExtractor;
friend class LLIntGenerator;
public:
FunctionCodeBlock(uint32_t functionIndex)
: m_functionIndex(functionIndex)
{
}
uint32_t functionIndex() const { return m_functionIndex; }
unsigned numVars() const { return m_numVars; }
unsigned numCalleeLocals() const { return m_numCalleeLocals; }
uint32_t numArguments() const { return m_numArguments; }
const Vector<Type>& constantTypes() const { return m_constantTypes; }
const Vector<uint64_t>& constants() const { return m_constants; }
const InstructionStream& instructions() const { return *m_instructions; }
void setNumVars(unsigned numVars) { m_numVars = numVars; }
void setNumCalleeLocals(unsigned numCalleeLocals) { m_numCalleeLocals = numCalleeLocals; }
ALWAYS_INLINE uint64_t getConstant(VirtualRegister reg) const { return m_constants[reg.toConstantIndex()]; }
ALWAYS_INLINE Type getConstantType(VirtualRegister reg) const
{
ASSERT(Options::dumpGeneratedWasmBytecodes());
return m_constantTypes[reg.toConstantIndex()];
}
void setInstructions(std::unique_ptr<InstructionStream>);
void addJumpTarget(InstructionStream::Offset jumpTarget) { m_jumpTargets.append(jumpTarget); }
InstructionStream::Offset numberOfJumpTargets() { return m_jumpTargets.size(); }
InstructionStream::Offset lastJumpTarget() { return m_jumpTargets.last(); }
void addOutOfLineJumpTarget(InstructionStream::Offset, int target);
const Instruction* outOfLineJumpTarget(const Instruction*);
InstructionStream::Offset outOfLineJumpOffset(InstructionStream::Offset);
InstructionStream::Offset outOfLineJumpOffset(const InstructionStream::Ref& instruction)
{
return outOfLineJumpOffset(instruction.offset());
}
inline InstructionStream::Offset bytecodeOffset(const Instruction* returnAddress)
{
const auto* instructionsBegin = m_instructions->at(0).ptr();
const auto* instructionsEnd = reinterpret_cast<const Instruction*>(reinterpret_cast<uintptr_t>(instructionsBegin) + m_instructions->size());
RELEASE_ASSERT(returnAddress >= instructionsBegin && returnAddress < instructionsEnd);
return returnAddress - instructionsBegin;
}
LLIntTierUpCounter& tierUpCounter() { return m_tierUpCounter; }
unsigned addSignature(const Signature&);
const Signature& signature(unsigned index) const;
struct JumpTableEntry {
int target { 0 };
unsigned startOffset;
unsigned dropCount;
unsigned keepCount;
};
using JumpTable = Vector<JumpTableEntry>;
JumpTable& addJumpTable(size_t numberOfEntries);
const JumpTable& jumpTable(unsigned tableIndex) const;
unsigned numberOfJumpTables() const;
private:
using OutOfLineJumpTargets = HashMap<InstructionStream::Offset, int>;
uint32_t m_functionIndex;
// Used for the number of WebAssembly locals, as in https://webassembly.github.io/spec/core/syntax/modules.html#syntax-local
unsigned m_numVars { 0 };
// Number of VirtualRegister. The naming is unfortunate, but has to match UnlinkedCodeBlock
unsigned m_numCalleeLocals { 0 };
uint32_t m_numArguments { 0 };
Vector<Type> m_constantTypes;
Vector<uint64_t> m_constants;
std::unique_ptr<InstructionStream> m_instructions;
const void* m_instructionsRawPointer { nullptr };
Vector<InstructionStream::Offset> m_jumpTargets;
Vector<const Signature*> m_signatures;
OutOfLineJumpTargets m_outOfLineJumpTargets;
LLIntTierUpCounter m_tierUpCounter;
Vector<JumpTable> m_jumpTables;
};
} } // namespace JSC::Wasm
#endif // ENABLE(WEBASSEMBLY)
|
