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/*
* Copyright (C) 2008-2018 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"
#if ENABLE(JIT)
#if USE(JSVALUE32_64)
#include "JIT.h"
#include "CodeBlock.h"
#include "Interpreter.h"
#include "JITInlines.h"
#include "JSArray.h"
#include "JSFunction.h"
#include "JSCInlines.h"
#include "LinkBuffer.h"
#include "ResultType.h"
#include "SetupVarargsFrame.h"
#include "StackAlignment.h"
#include "ThunkGenerators.h"
#include <wtf/StringPrintStream.h>
namespace JSC {
void JIT::emitPutCallResult(Instruction* instruction)
{
int dst = instruction[1].u.operand;
emitValueProfilingSite();
emitStore(dst, regT1, regT0);
}
void JIT::emit_op_ret(Instruction* currentInstruction)
{
unsigned dst = currentInstruction[1].u.operand;
emitLoad(dst, regT1, regT0);
checkStackPointerAlignment();
emitRestoreCalleeSaves();
emitFunctionEpilogue();
ret();
}
void JIT::emitSlow_op_call(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
compileOpCallSlowCase(op_call, currentInstruction, iter, m_callLinkInfoIndex++);
}
void JIT::emitSlow_op_tail_call(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
compileOpCallSlowCase(op_tail_call, currentInstruction, iter, m_callLinkInfoIndex++);
}
void JIT::emitSlow_op_call_eval(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
compileOpCallSlowCase(op_call_eval, currentInstruction, iter, m_callLinkInfoIndex);
}
void JIT::emitSlow_op_call_varargs(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
compileOpCallSlowCase(op_call_varargs, currentInstruction, iter, m_callLinkInfoIndex++);
}
void JIT::emitSlow_op_tail_call_varargs(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
compileOpCallSlowCase(op_tail_call_varargs, currentInstruction, iter, m_callLinkInfoIndex++);
}
void JIT::emitSlow_op_tail_call_forward_arguments(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
compileOpCallSlowCase(op_tail_call_forward_arguments, currentInstruction, iter, m_callLinkInfoIndex++);
}
void JIT::emitSlow_op_construct_varargs(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
compileOpCallSlowCase(op_construct_varargs, currentInstruction, iter, m_callLinkInfoIndex++);
}
void JIT::emitSlow_op_construct(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
compileOpCallSlowCase(op_construct, currentInstruction, iter, m_callLinkInfoIndex++);
}
void JIT::emit_op_call(Instruction* currentInstruction)
{
compileOpCall(op_call, currentInstruction, m_callLinkInfoIndex++);
}
void JIT::emit_op_tail_call(Instruction* currentInstruction)
{
compileOpCall(op_tail_call, currentInstruction, m_callLinkInfoIndex++);
}
void JIT::emit_op_call_eval(Instruction* currentInstruction)
{
compileOpCall(op_call_eval, currentInstruction, m_callLinkInfoIndex);
}
void JIT::emit_op_call_varargs(Instruction* currentInstruction)
{
compileOpCall(op_call_varargs, currentInstruction, m_callLinkInfoIndex++);
}
void JIT::emit_op_tail_call_varargs(Instruction* currentInstruction)
{
compileOpCall(op_tail_call_varargs, currentInstruction, m_callLinkInfoIndex++);
}
void JIT::emit_op_tail_call_forward_arguments(Instruction* currentInstruction)
{
compileOpCall(op_tail_call_forward_arguments, currentInstruction, m_callLinkInfoIndex++);
}
void JIT::emit_op_construct_varargs(Instruction* currentInstruction)
{
compileOpCall(op_construct_varargs, currentInstruction, m_callLinkInfoIndex++);
}
void JIT::emit_op_construct(Instruction* currentInstruction)
{
compileOpCall(op_construct, currentInstruction, m_callLinkInfoIndex++);
}
void JIT::compileSetupVarargsFrame(OpcodeID opcode, Instruction* instruction, CallLinkInfo* info)
{
int thisValue = instruction[3].u.operand;
int arguments = instruction[4].u.operand;
int firstFreeRegister = instruction[5].u.operand;
int firstVarArgOffset = instruction[6].u.operand;
emitLoad(arguments, regT1, regT0);
Z_JITOperation_EJZZ sizeOperation;
if (opcode == op_tail_call_forward_arguments)
sizeOperation = operationSizeFrameForForwardArguments;
else
sizeOperation = operationSizeFrameForVarargs;
callOperation(sizeOperation, JSValueRegs(regT1, regT0), -firstFreeRegister, firstVarArgOffset);
move(TrustedImm32(-firstFreeRegister), regT1);
emitSetVarargsFrame(*this, returnValueGPR, false, regT1, regT1);
addPtr(TrustedImm32(-(sizeof(CallerFrameAndPC) + WTF::roundUpToMultipleOf(stackAlignmentBytes(), 6 * sizeof(void*)))), regT1, stackPointerRegister);
emitLoad(arguments, regT2, regT4);
F_JITOperation_EFJZZ setupOperation;
if (opcode == op_tail_call_forward_arguments)
setupOperation = operationSetupForwardArgumentsFrame;
else
setupOperation = operationSetupVarargsFrame;
callOperation(setupOperation, regT1, JSValueRegs(regT2, regT4), firstVarArgOffset, regT0);
move(returnValueGPR, regT1);
// Profile the argument count.
load32(Address(regT1, CallFrameSlot::argumentCount * static_cast<int>(sizeof(Register)) + PayloadOffset), regT2);
load32(info->addressOfMaxNumArguments(), regT0);
Jump notBiggest = branch32(Above, regT0, regT2);
store32(regT2, info->addressOfMaxNumArguments());
notBiggest.link(this);
// Initialize 'this'.
emitLoad(thisValue, regT2, regT0);
store32(regT0, Address(regT1, PayloadOffset + (CallFrame::thisArgumentOffset() * static_cast<int>(sizeof(Register)))));
store32(regT2, Address(regT1, TagOffset + (CallFrame::thisArgumentOffset() * static_cast<int>(sizeof(Register)))));
addPtr(TrustedImm32(sizeof(CallerFrameAndPC)), regT1, stackPointerRegister);
}
void JIT::compileCallEval(Instruction* instruction)
{
addPtr(TrustedImm32(-static_cast<ptrdiff_t>(sizeof(CallerFrameAndPC))), stackPointerRegister, regT1);
storePtr(callFrameRegister, Address(regT1, CallFrame::callerFrameOffset()));
addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
callOperation(operationCallEval, regT1);
addSlowCase(branch32(Equal, regT1, TrustedImm32(JSValue::EmptyValueTag)));
sampleCodeBlock(m_codeBlock);
emitPutCallResult(instruction);
}
void JIT::compileCallEvalSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
CallLinkInfo* info = m_codeBlock->addCallLinkInfo();
info->setUpCall(CallLinkInfo::Call, CodeOrigin(m_bytecodeOffset), regT0);
int registerOffset = -instruction[4].u.operand;
int callee = instruction[2].u.operand;
addPtr(TrustedImm32(registerOffset * sizeof(Register) + sizeof(CallerFrameAndPC)), callFrameRegister, stackPointerRegister);
emitLoad(callee, regT1, regT0);
emitDumbVirtualCall(*vm(), info);
addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
checkStackPointerAlignment();
sampleCodeBlock(m_codeBlock);
emitPutCallResult(instruction);
}
void JIT::compileOpCall(OpcodeID opcodeID, Instruction* instruction, unsigned callLinkInfoIndex)
{
int callee = instruction[2].u.operand;
/* Caller always:
- Updates callFrameRegister to callee callFrame.
- Initializes ArgumentCount; CallerFrame; Callee.
For a JS call:
- Callee initializes ReturnPC; CodeBlock.
- Callee restores callFrameRegister before return.
For a non-JS call:
- Caller initializes ReturnPC; CodeBlock.
- Caller restores callFrameRegister after return.
*/
CallLinkInfo* info = nullptr;
if (opcodeID != op_call_eval)
info = m_codeBlock->addCallLinkInfo();
if (opcodeID == op_call_varargs || opcodeID == op_construct_varargs || opcodeID == op_tail_call_varargs || opcodeID == op_tail_call_forward_arguments)
compileSetupVarargsFrame(opcodeID, instruction, info);
else {
int argCount = instruction[3].u.operand;
int registerOffset = -instruction[4].u.operand;
if (opcodeID == op_call && shouldEmitProfiling()) {
emitLoad(registerOffset + CallFrame::argumentOffsetIncludingThis(0), regT0, regT1);
Jump done = branch32(NotEqual, regT0, TrustedImm32(JSValue::CellTag));
loadPtr(Address(regT1, JSCell::structureIDOffset()), regT1);
storePtr(regT1, instruction[OPCODE_LENGTH(op_call) - 2].u.arrayProfile->addressOfLastSeenStructureID());
done.link(this);
}
addPtr(TrustedImm32(registerOffset * sizeof(Register) + sizeof(CallerFrameAndPC)), callFrameRegister, stackPointerRegister);
store32(TrustedImm32(argCount), Address(stackPointerRegister, CallFrameSlot::argumentCount * static_cast<int>(sizeof(Register)) + PayloadOffset - sizeof(CallerFrameAndPC)));
} // SP holds newCallFrame + sizeof(CallerFrameAndPC), with ArgumentCount initialized.
uint32_t locationBits = CallSiteIndex(instruction).bits();
store32(TrustedImm32(locationBits), tagFor(CallFrameSlot::argumentCount, callFrameRegister));
emitLoad(callee, regT1, regT0); // regT1, regT0 holds callee.
store32(regT0, Address(stackPointerRegister, CallFrameSlot::callee * static_cast<int>(sizeof(Register)) + PayloadOffset - sizeof(CallerFrameAndPC)));
store32(regT1, Address(stackPointerRegister, CallFrameSlot::callee * static_cast<int>(sizeof(Register)) + TagOffset - sizeof(CallerFrameAndPC)));
if (opcodeID == op_call_eval) {
compileCallEval(instruction);
return;
}
if (opcodeID == op_tail_call || opcodeID == op_tail_call_varargs)
emitRestoreCalleeSaves();
addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag)));
DataLabelPtr addressOfLinkedFunctionCheck;
Jump slowCase = branchPtrWithPatch(NotEqual, regT0, addressOfLinkedFunctionCheck, TrustedImmPtr(nullptr));
addSlowCase(slowCase);
ASSERT(m_callCompilationInfo.size() == callLinkInfoIndex);
info->setUpCall(CallLinkInfo::callTypeFor(opcodeID), CodeOrigin(m_bytecodeOffset), regT0);
m_callCompilationInfo.append(CallCompilationInfo());
m_callCompilationInfo[callLinkInfoIndex].hotPathBegin = addressOfLinkedFunctionCheck;
m_callCompilationInfo[callLinkInfoIndex].callLinkInfo = info;
checkStackPointerAlignment();
if (opcodeID == op_tail_call || opcodeID == op_tail_call_varargs || opcodeID == op_tail_call_forward_arguments) {
prepareForTailCallSlow();
m_callCompilationInfo[callLinkInfoIndex].hotPathOther = emitNakedTailCall();
return;
}
m_callCompilationInfo[callLinkInfoIndex].hotPathOther = emitNakedCall();
addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
checkStackPointerAlignment();
sampleCodeBlock(m_codeBlock);
emitPutCallResult(instruction);
}
void JIT::compileOpCallSlowCase(OpcodeID opcodeID, Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter, unsigned callLinkInfoIndex)
{
if (opcodeID == op_call_eval) {
compileCallEvalSlowCase(instruction, iter);
return;
}
linkAllSlowCases(iter);
move(TrustedImmPtr(m_callCompilationInfo[callLinkInfoIndex].callLinkInfo), regT2);
if (opcodeID == op_tail_call || opcodeID == op_tail_call_varargs)
emitRestoreCalleeSaves();
m_callCompilationInfo[callLinkInfoIndex].callReturnLocation = emitNakedCall(m_vm->getCTIStub(linkCallThunkGenerator).retaggedCode<NoPtrTag>());
if (opcodeID == op_tail_call || opcodeID == op_tail_call_varargs) {
abortWithReason(JITDidReturnFromTailCall);
return;
}
addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
checkStackPointerAlignment();
sampleCodeBlock(m_codeBlock);
emitPutCallResult(instruction);
}
} // namespace JSC
#endif // USE(JSVALUE32_64)
#endif // ENABLE(JIT)