/*
* 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"
#if ENABLE(LLINT)
#include "BytecodeConventions.h"
#include "CodeType.h"
#include "Instruction.h"
#include "JSScope.h"
#include "LLIntCLoop.h"
#include "Opcode.h"
#include "PropertyOffset.h"
namespace JSC { namespace LLInt {
Instruction* Data::s_exceptionInstructions = 0;
Opcode* Data::s_opcodeMap = 0;
void initialize()
{
Data::s_exceptionInstructions = new Instruction[maxOpcodeLength + 1];
Data::s_opcodeMap = new Opcode[numOpcodeIDs];
#if ENABLE(LLINT_C_LOOP)
CLoop::initialize();
#else // !ENABLE(LLINT_C_LOOP)
for (int i = 0; i < maxOpcodeLength + 1; ++i)
Data::s_exceptionInstructions[i].u.pointer =
LLInt::getCodePtr(llint_throw_from_slow_path_trampoline);
#define OPCODE_ENTRY(opcode, length) \
Data::s_opcodeMap[opcode] = LLInt::getCodePtr(llint_##opcode);
FOR_EACH_OPCODE_ID(OPCODE_ENTRY);
#undef OPCODE_ENTRY
#endif // !ENABLE(LLINT_C_LOOP)
}
#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(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