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
|
/*
* Copyright (C) 2011 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.
*/
#include "config.h"
#include "LLIntData.h"
#include "BytecodeConventions.h"
#include "CodeBlock.h"
#include "CodeType.h"
#include "Instruction.h"
#include "JSScope.h"
#include "LLIntCLoop.h"
#include "MaxFrameExtentForSlowPathCall.h"
#include "Opcode.h"
#include "PropertyOffset.h"
#include "WriteBarrier.h"
#define STATIC_ASSERT(cond) static_assert(cond, "LLInt assumes " #cond)
namespace JSC { namespace LLInt {
Instruction* Data::s_exceptionInstructions = 0;
Opcode Data::s_opcodeMap[numOpcodeIDs] = { };
#if ENABLE(JIT)
extern "C" void llint_entry(void*);
#endif
void initialize()
{
Data::s_exceptionInstructions = new Instruction[maxOpcodeLength + 1];
#if !ENABLE(JIT)
CLoop::initialize();
#else // ENABLE(JIT)
llint_entry(&Data::s_opcodeMap);
for (int i = 0; i < maxOpcodeLength + 1; ++i)
Data::s_exceptionInstructions[i].u.pointer =
LLInt::getCodePtr(llint_throw_from_slow_path_trampoline);
#endif // ENABLE(JIT)
}
#if COMPILER(CLANG)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wmissing-noreturn"
#endif
void Data::performAssertions(VM& vm)
{
UNUSED_PARAM(vm);
// Assertions to match LowLevelInterpreter.asm. If you change any of this code, be
// prepared to change LowLevelInterpreter.asm as well!!
#if USE(JSVALUE64)
const ptrdiff_t PtrSize = 8;
const ptrdiff_t CallFrameHeaderSlots = 5;
#else // USE(JSVALUE64) // i.e. 32-bit version
const ptrdiff_t PtrSize = 4;
const ptrdiff_t CallFrameHeaderSlots = 4;
#endif
const ptrdiff_t SlotSize = 8;
STATIC_ASSERT(sizeof(void*) == PtrSize);
STATIC_ASSERT(sizeof(Register) == SlotSize);
STATIC_ASSERT(JSStack::CallFrameHeaderSize == CallFrameHeaderSlots);
ASSERT(!CallFrame::callerFrameOffset());
STATIC_ASSERT(JSStack::CallerFrameAndPCSize == (PtrSize * 2) / SlotSize);
ASSERT(CallFrame::returnPCOffset() == CallFrame::callerFrameOffset() + PtrSize);
ASSERT(JSStack::CodeBlock * sizeof(Register) == CallFrame::returnPCOffset() + PtrSize);
STATIC_ASSERT(JSStack::Callee * sizeof(Register) == JSStack::CodeBlock * sizeof(Register) + SlotSize);
STATIC_ASSERT(JSStack::ArgumentCount * sizeof(Register) == JSStack::Callee * sizeof(Register) + SlotSize);
STATIC_ASSERT(JSStack::ThisArgument * sizeof(Register) == JSStack::ArgumentCount * sizeof(Register) + SlotSize);
STATIC_ASSERT(JSStack::CallFrameHeaderSize == JSStack::ThisArgument);
ASSERT(CallFrame::argumentOffsetIncludingThis(0) == JSStack::ThisArgument);
#if CPU(BIG_ENDIAN)
ASSERT(OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.tag) == 0);
ASSERT(OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.payload) == 4);
#else
ASSERT(OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.tag) == 4);
ASSERT(OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.payload) == 0);
#endif
#if USE(JSVALUE32_64)
STATIC_ASSERT(JSValue::Int32Tag == static_cast<unsigned>(-1));
STATIC_ASSERT(JSValue::BooleanTag == static_cast<unsigned>(-2));
STATIC_ASSERT(JSValue::NullTag == static_cast<unsigned>(-3));
STATIC_ASSERT(JSValue::UndefinedTag == static_cast<unsigned>(-4));
STATIC_ASSERT(JSValue::CellTag == static_cast<unsigned>(-5));
STATIC_ASSERT(JSValue::EmptyValueTag == static_cast<unsigned>(-6));
STATIC_ASSERT(JSValue::DeletedValueTag == static_cast<unsigned>(-7));
STATIC_ASSERT(JSValue::LowestTag == static_cast<unsigned>(-7));
#else
STATIC_ASSERT(TagBitTypeOther == 0x2);
STATIC_ASSERT(TagBitBool == 0x4);
STATIC_ASSERT(TagBitUndefined == 0x8);
STATIC_ASSERT(ValueEmpty == 0x0);
STATIC_ASSERT(ValueFalse == (TagBitTypeOther | TagBitBool));
STATIC_ASSERT(ValueTrue == (TagBitTypeOther | TagBitBool | 1));
STATIC_ASSERT(ValueUndefined == (TagBitTypeOther | TagBitUndefined));
STATIC_ASSERT(ValueNull == TagBitTypeOther);
#endif
#if (CPU(X86_64) && !OS(WINDOWS)) || CPU(ARM64) || !ENABLE(JIT)
STATIC_ASSERT(!maxFrameExtentForSlowPathCall);
#elif CPU(ARM) || CPU(SH4)
STATIC_ASSERT(maxFrameExtentForSlowPathCall == 24);
#elif CPU(X86) || CPU(MIPS)
STATIC_ASSERT(maxFrameExtentForSlowPathCall == 40);
#elif CPU(X86_64) && OS(WINDOWS)
STATIC_ASSERT(maxFrameExtentForSlowPathCall == 64);
#endif
#if !ENABLE(JIT) || USE(JSVALUE32_64)
ASSERT(!CodeBlock::llintBaselineCalleeSaveSpaceAsVirtualRegisters());
#elif (CPU(X86_64) && !OS(WINDOWS)) || CPU(ARM64)
ASSERT(CodeBlock::llintBaselineCalleeSaveSpaceAsVirtualRegisters() == 3);
#elif (CPU(X86_64) && OS(WINDOWS))
ASSERT(CodeBlock::llintBaselineCalleeSaveSpaceAsVirtualRegisters() == 3);
#endif
STATIC_ASSERT(StringType == 6);
STATIC_ASSERT(SymbolType == 7);
STATIC_ASSERT(ObjectType == 21);
STATIC_ASSERT(FinalObjectType == 22);
STATIC_ASSERT(MasqueradesAsUndefined == 1);
STATIC_ASSERT(ImplementsDefaultHasInstance == 2);
STATIC_ASSERT(FirstConstantRegisterIndex == 0x40000000);
STATIC_ASSERT(GlobalCode == 0);
STATIC_ASSERT(EvalCode == 1);
STATIC_ASSERT(FunctionCode == 2);
STATIC_ASSERT(ModuleCode == 3);
ASSERT(!(reinterpret_cast<ptrdiff_t>((reinterpret_cast<WriteBarrier<JSCell>*>(0x4000)->slot())) - 0x4000));
static_assert(PutByIdPrimaryTypeMask == 0x6, "LLInt assumes PutByIdPrimaryTypeMask is == 0x6");
static_assert(PutByIdPrimaryTypeSecondary == 0x0, "LLInt assumes PutByIdPrimaryTypeSecondary is == 0x0");
static_assert(PutByIdPrimaryTypeObjectWithStructure == 0x2, "LLInt assumes PutByIdPrimaryTypeObjectWithStructure is == 0x2");
static_assert(PutByIdPrimaryTypeObjectWithStructureOrOther == 0x4, "LLInt assumes PutByIdPrimaryTypeObjectWithStructureOrOther is == 0x4");
static_assert(PutByIdSecondaryTypeMask == -0x8, "LLInt assumes PutByIdSecondaryTypeMask is == -0x8");
static_assert(PutByIdSecondaryTypeBottom == 0x0, "LLInt assumes PutByIdSecondaryTypeBottom is == 0x0");
static_assert(PutByIdSecondaryTypeBoolean == 0x8, "LLInt assumes PutByIdSecondaryTypeBoolean is == 0x8");
static_assert(PutByIdSecondaryTypeOther == 0x10, "LLInt assumes PutByIdSecondaryTypeOther is == 0x10");
static_assert(PutByIdSecondaryTypeInt32 == 0x18, "LLInt assumes PutByIdSecondaryTypeInt32 is == 0x18");
static_assert(PutByIdSecondaryTypeNumber == 0x20, "LLInt assumes PutByIdSecondaryTypeNumber is == 0x20");
static_assert(PutByIdSecondaryTypeString == 0x28, "LLInt assumes PutByIdSecondaryTypeString is == 0x28");
static_assert(PutByIdSecondaryTypeSymbol == 0x30, "LLInt assumes PutByIdSecondaryTypeSymbol is == 0x30");
static_assert(PutByIdSecondaryTypeObject == 0x38, "LLInt assumes PutByIdSecondaryTypeObject is == 0x38");
static_assert(PutByIdSecondaryTypeObjectOrOther == 0x40, "LLInt assumes PutByIdSecondaryTypeObjectOrOther is == 0x40");
static_assert(PutByIdSecondaryTypeTop == 0x48, "LLInt assumes PutByIdSecondaryTypeTop is == 0x48");
static_assert(GlobalProperty == 0, "LLInt assumes GlobalProperty ResultType is == 0");
static_assert(GlobalVar == 1, "LLInt assumes GlobalVar ResultType is == 1");
static_assert(GlobalLexicalVar == 2, "LLInt assumes GlobalLexicalVar ResultType is == 2");
static_assert(ClosureVar == 3, "LLInt assumes ClosureVar ResultType is == 3");
static_assert(LocalClosureVar == 4, "LLInt assumes LocalClosureVar ResultType is == 4");
static_assert(ModuleVar == 5, "LLInt assumes ModuleVar ResultType is == 5");
static_assert(GlobalPropertyWithVarInjectionChecks == 6, "LLInt assumes GlobalPropertyWithVarInjectionChecks ResultType is == 6");
static_assert(GlobalVarWithVarInjectionChecks == 7, "LLInt assumes GlobalVarWithVarInjectionChecks ResultType is == 7");
static_assert(GlobalLexicalVarWithVarInjectionChecks == 8, "LLInt assumes GlobalLexicalVarWithVarInjectionChecks ResultType is == 8");
static_assert(ClosureVarWithVarInjectionChecks == 9, "LLInt assumes ClosureVarWithVarInjectionChecks ResultType is == 9");
static_assert(InitializationMode::Initialization == 0, "LLInt assumes that InitializationMode::Initialization is 0");
STATIC_ASSERT(GetPutInfo::typeBits == 0x3ff);
STATIC_ASSERT(GetPutInfo::initializationShift == 10);
STATIC_ASSERT(GetPutInfo::initializationBits == 0xffc00);
STATIC_ASSERT(MarkedBlock::blockMask == ~static_cast<decltype(MarkedBlock::blockMask)>(0x3fff));
// FIXME: make these assertions less horrible.
#if !ASSERT_DISABLED
Vector<int> testVector;
testVector.resize(42);
ASSERT(bitwise_cast<uint32_t*>(&testVector)[sizeof(void*)/sizeof(uint32_t) + 1] == 42);
ASSERT(bitwise_cast<int**>(&testVector)[0] == testVector.begin());
#endif
ASSERT(StringImpl::s_hashFlag8BitBuffer == 8);
}
#if COMPILER(CLANG)
#pragma clang diagnostic pop
#endif
} } // namespace JSC::LLInt
|
