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Copy pathLLIntData.cpp
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172 lines (151 loc) · 6.43 KB
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/*
* 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 "CodeType.h"
#include "Instruction.h"
#include "JSScope.h"
#include "LLIntCLoop.h"
#include "MaxFrameExtentForSlowPathCall.h"
#include "Opcode.h"
#include "PropertyOffset.h"
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!!
#ifndef NDEBUG
#if USE(JSVALUE64)
const ptrdiff_t PtrSize = 8;
const ptrdiff_t CallFrameHeaderSlots = 6;
#else // USE(JSVALUE64) // i.e. 32-bit version
const ptrdiff_t PtrSize = 4;
const ptrdiff_t CallFrameHeaderSlots = 5;
#endif
const ptrdiff_t SlotSize = 8;
#endif
ASSERT(sizeof(void*) == PtrSize);
ASSERT(sizeof(Register) == SlotSize);
ASSERT(JSStack::CallFrameHeaderSize == CallFrameHeaderSlots);
ASSERT(!CallFrame::callerFrameOffset());
ASSERT(JSStack::CallerFrameAndPCSize == (PtrSize * 2) / SlotSize);
ASSERT(CallFrame::returnPCOffset() == CallFrame::callerFrameOffset() + PtrSize);
ASSERT(JSStack::CodeBlock * sizeof(Register) == CallFrame::returnPCOffset() + PtrSize);
ASSERT(JSStack::ScopeChain * sizeof(Register) == JSStack::CodeBlock * sizeof(Register) + SlotSize);
ASSERT(JSStack::Callee * sizeof(Register) == JSStack::ScopeChain * sizeof(Register) + SlotSize);
ASSERT(JSStack::ArgumentCount * sizeof(Register) == JSStack::Callee * sizeof(Register) + SlotSize);
ASSERT(JSStack::ThisArgument * sizeof(Register) == JSStack::ArgumentCount * sizeof(Register) + SlotSize);
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)
ASSERT(JSValue::Int32Tag == static_cast<unsigned>(-1));
ASSERT(JSValue::BooleanTag == static_cast<unsigned>(-2));
ASSERT(JSValue::NullTag == static_cast<unsigned>(-3));
ASSERT(JSValue::UndefinedTag == static_cast<unsigned>(-4));
ASSERT(JSValue::CellTag == static_cast<unsigned>(-5));
ASSERT(JSValue::EmptyValueTag == static_cast<unsigned>(-6));
ASSERT(JSValue::DeletedValueTag == static_cast<unsigned>(-7));
ASSERT(JSValue::LowestTag == static_cast<unsigned>(-7));
#else
ASSERT(TagBitTypeOther == 0x2);
ASSERT(TagBitBool == 0x4);
ASSERT(TagBitUndefined == 0x8);
ASSERT(ValueEmpty == 0x0);
ASSERT(ValueFalse == (TagBitTypeOther | TagBitBool));
ASSERT(ValueTrue == (TagBitTypeOther | TagBitBool | 1));
ASSERT(ValueUndefined == (TagBitTypeOther | TagBitUndefined));
ASSERT(ValueNull == TagBitTypeOther);
#endif
#if (CPU(X86_64) && !OS(WINDOWS)) || CPU(ARM64) || !ENABLE(JIT)
ASSERT(!maxFrameExtentForSlowPathCall);
#elif CPU(ARM) || CPU(SH4)
ASSERT(maxFrameExtentForSlowPathCall == 24);
#elif CPU(X86) || CPU(MIPS)
ASSERT(maxFrameExtentForSlowPathCall == 40);
#elif CPU(X86_64) && OS(WINDOWS)
ASSERT(maxFrameExtentForSlowPathCall == 64);
#endif
ASSERT(StringType == 5);
ASSERT(ObjectType == 18);
ASSERT(FinalObjectType == 19);
ASSERT(MasqueradesAsUndefined == 1);
ASSERT(ImplementsHasInstance == 2);
ASSERT(ImplementsDefaultHasInstance == 8);
ASSERT(FirstConstantRegisterIndex == 0x40000000);
ASSERT(GlobalCode == 0);
ASSERT(EvalCode == 1);
ASSERT(FunctionCode == 2);
ASSERT(GlobalProperty == 0);
ASSERT(GlobalVar == 1);
ASSERT(ClosureVar == 2);
ASSERT(GlobalPropertyWithVarInjectionChecks == 3);
ASSERT(GlobalVarWithVarInjectionChecks == 4);
ASSERT(ClosureVarWithVarInjectionChecks == 5);
ASSERT(Dynamic == 6);
ASSERT(ResolveModeAndType::mask == 0xffff);
ASSERT(MarkedBlock::blockMask == ~static_cast<decltype(MarkedBlock::blockMask)>(0xffff));
// 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 == 32);
}
#if COMPILER(CLANG)
#pragma clang diagnostic pop
#endif
} } // namespace JSC::LLInt