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/*
* Copyright (C) 2008-2019 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.
*/
#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 "OpcodeInlines.h"
#include "ResultType.h"
#include "SetupVarargsFrame.h"
#include "StackAlignment.h"
#include "ThunkGenerators.h"
#include <wtf/StringPrintStream.h>
namespace JSC {
template<typename Op>
void JIT::emitPutCallResult(const Op& bytecode)
{
emitValueProfilingSite(bytecode.metadata(m_codeBlock));
emitStore(bytecode.m_dst, regT1, regT0);
}
void JIT::emit_op_ret(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpRet>();
VirtualRegister value = bytecode.m_value;
emitLoad(value, regT1, regT0);
checkStackPointerAlignment();
emitRestoreCalleeSaves();
emitFunctionEpilogue();
ret();
}
void JIT::emitSlow_op_call(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
compileOpCallSlowCase<OpCall>(currentInstruction, iter, m_callLinkInfoIndex++);
}
void JIT::emitSlow_op_tail_call(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
compileOpCallSlowCase<OpTailCall>(currentInstruction, iter, m_callLinkInfoIndex++);
}
void JIT::emitSlow_op_call_eval(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
compileOpCallSlowCase<OpCallEval>(currentInstruction, iter, m_callLinkInfoIndex);
}
void JIT::emitSlow_op_call_varargs(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
compileOpCallSlowCase<OpCallVarargs>(currentInstruction, iter, m_callLinkInfoIndex++);
}
void JIT::emitSlow_op_tail_call_varargs(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
compileOpCallSlowCase<OpTailCallVarargs>(currentInstruction, iter, m_callLinkInfoIndex++);
}
void JIT::emitSlow_op_tail_call_forward_arguments(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
compileOpCallSlowCase<OpTailCallForwardArguments>(currentInstruction, iter, m_callLinkInfoIndex++);
}
void JIT::emitSlow_op_construct_varargs(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
compileOpCallSlowCase<OpConstructVarargs>(currentInstruction, iter, m_callLinkInfoIndex++);
}
void JIT::emitSlow_op_construct(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
compileOpCallSlowCase<OpConstruct>(currentInstruction, iter, m_callLinkInfoIndex++);
}
void JIT::emit_op_call(const Instruction* currentInstruction)
{
compileOpCall<OpCall>(currentInstruction, m_callLinkInfoIndex++);
}
void JIT::emit_op_tail_call(const Instruction* currentInstruction)
{
compileOpCall<OpTailCall>(currentInstruction, m_callLinkInfoIndex++);
}
void JIT::emit_op_call_eval(const Instruction* currentInstruction)
{
compileOpCall<OpCallEval>(currentInstruction, m_callLinkInfoIndex);
}
void JIT::emit_op_call_varargs(const Instruction* currentInstruction)
{
compileOpCall<OpCallVarargs>(currentInstruction, m_callLinkInfoIndex++);
}
void JIT::emit_op_tail_call_varargs(const Instruction* currentInstruction)
{
compileOpCall<OpTailCallVarargs>(currentInstruction, m_callLinkInfoIndex++);
}
void JIT::emit_op_tail_call_forward_arguments(const Instruction* currentInstruction)
{
compileOpCall<OpTailCallForwardArguments>(currentInstruction, m_callLinkInfoIndex++);
}
void JIT::emit_op_construct_varargs(const Instruction* currentInstruction)
{
compileOpCall<OpConstructVarargs>(currentInstruction, m_callLinkInfoIndex++);
}
void JIT::emit_op_construct(const Instruction* currentInstruction)
{
compileOpCall<OpConstruct>(currentInstruction, m_callLinkInfoIndex++);
}
template <typename Op>
std::enable_if_t<
Op::opcodeID != op_call_varargs && Op::opcodeID != op_construct_varargs
&& Op::opcodeID != op_tail_call_varargs && Op::opcodeID != op_tail_call_forward_arguments
, void>
JIT::compileSetupFrame(const Op& bytecode, CallLinkInfo*)
{
auto& metadata = bytecode.metadata(m_codeBlock);
int argCount = bytecode.m_argc;
int registerOffset = -static_cast<int>(bytecode.m_argv);
if (Op::opcodeID == op_call && shouldEmitProfiling()) {
emitLoad(VirtualRegister(registerOffset + CallFrame::argumentOffsetIncludingThis(0)), regT0, regT1);
Jump done = branchIfNotCell(regT0);
load32(Address(regT1, JSCell::structureIDOffset()), regT1);
store32(regT1, metadata.m_callLinkInfo.m_arrayProfile.addressOfLastSeenStructureID());
done.link(this);
}
addPtr(TrustedImm32(registerOffset * sizeof(Register) + sizeof(CallerFrameAndPC)), callFrameRegister, stackPointerRegister);
store32(TrustedImm32(argCount), Address(stackPointerRegister, CallFrameSlot::argumentCountIncludingThis * static_cast<int>(sizeof(Register)) + PayloadOffset - sizeof(CallerFrameAndPC)));
}
template<typename Op>
std::enable_if_t<
Op::opcodeID == op_call_varargs || Op::opcodeID == op_construct_varargs
|| Op::opcodeID == op_tail_call_varargs || Op::opcodeID == op_tail_call_forward_arguments
, void>
JIT::compileSetupFrame(const Op& bytecode, CallLinkInfo* info)
{
OpcodeID opcodeID = Op::opcodeID;
VirtualRegister thisValue = bytecode.m_thisValue;
VirtualRegister arguments = bytecode.m_arguments;
int firstFreeRegister = bytecode.m_firstFree.offset();
int firstVarArgOffset = bytecode.m_firstVarArg;
emitLoad(arguments, regT1, regT0);
Z_JITOperation_GJZZ sizeOperation;
if (Op::opcodeID == op_tail_call_forward_arguments)
sizeOperation = operationSizeFrameForForwardArguments;
else
sizeOperation = operationSizeFrameForVarargs;
callOperation(sizeOperation, m_codeBlock->globalObject(), 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_GFJZZ setupOperation;
if (opcodeID == op_tail_call_forward_arguments)
setupOperation = operationSetupForwardArgumentsFrame;
else
setupOperation = operationSetupVarargsFrame;
callOperation(setupOperation, m_codeBlock->globalObject(), regT1, JSValueRegs(regT2, regT4), firstVarArgOffset, regT0);
move(returnValueGPR, regT1);
// Profile the argument count.
load32(Address(regT1, CallFrameSlot::argumentCountIncludingThis * static_cast<int>(sizeof(Register)) + PayloadOffset), regT2);
load32(info->addressOfMaxArgumentCountIncludingThis(), regT0);
Jump notBiggest = branch32(Above, regT0, regT2);
store32(regT2, info->addressOfMaxArgumentCountIncludingThis());
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);
}
template<typename Op>
bool JIT::compileCallEval(const Op&)
{
return false;
}
template<>
bool JIT::compileCallEval(const OpCallEval& bytecode)
{
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, m_codeBlock->globalObject(), regT1);
addSlowCase(branchIfEmpty(regT1));
sampleCodeBlock(m_codeBlock);
emitPutCallResult(bytecode);
return true;
}
void JIT::compileCallEvalSlowCase(const Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
auto bytecode = instruction->as<OpCallEval>();
CallLinkInfo* info = m_codeBlock->addCallLinkInfo();
info->setUpCall(CallLinkInfo::Call, CodeOrigin(m_bytecodeIndex), regT0);
int registerOffset = -bytecode.m_argv;
VirtualRegister callee = bytecode.m_callee;
addPtr(TrustedImm32(registerOffset * sizeof(Register) + sizeof(CallerFrameAndPC)), callFrameRegister, stackPointerRegister);
emitLoad(callee, regT1, regT0);
emitDumbVirtualCall(vm(), m_codeBlock->globalObject(), info);
addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
checkStackPointerAlignment();
sampleCodeBlock(m_codeBlock);
emitPutCallResult(bytecode);
}
template <typename Op>
void JIT::compileOpCall(const Instruction* instruction, unsigned callLinkInfoIndex)
{
OpcodeID opcodeID = Op::opcodeID;
auto bytecode = instruction->as<Op>();
VirtualRegister callee = bytecode.m_callee;
/* 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();
compileSetupFrame(bytecode, info);
// SP holds newCallFrame + sizeof(CallerFrameAndPC), with ArgumentCount initialized.
auto bytecodeIndex = m_codeBlock->bytecodeIndex(instruction);
uint32_t locationBits = CallSiteIndex(bytecodeIndex).bits();
store32(TrustedImm32(locationBits), tagFor(CallFrameSlot::argumentCountIncludingThis));
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 (compileCallEval(bytecode))
return;
if (opcodeID == op_tail_call || opcodeID == op_tail_call_varargs)
emitRestoreCalleeSaves();
addSlowCase(branchIfNotCell(regT1));
DataLabelPtr addressOfLinkedFunctionCheck;
Jump slowCase = branchPtrWithPatch(NotEqual, regT0, addressOfLinkedFunctionCheck, TrustedImmPtr(nullptr));
addSlowCase(slowCase);
ASSERT(m_callCompilationInfo.size() == callLinkInfoIndex);
info->setUpCall(CallLinkInfo::callTypeFor(opcodeID), CodeOrigin(m_bytecodeIndex), 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(bytecode);
}
template <typename Op>
void JIT::compileOpCallSlowCase(const Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter, unsigned callLinkInfoIndex)
{
OpcodeID opcodeID = Op::opcodeID;
if (opcodeID == op_call_eval) {
compileCallEvalSlowCase(instruction, iter);
return;
}
linkAllSlowCases(iter);
move(TrustedImmPtr(m_codeBlock->globalObject()), regT3);
move(TrustedImmPtr(m_callCompilationInfo[callLinkInfoIndex].callLinkInfo), regT2);
if (opcodeID == op_tail_call || opcodeID == op_tail_call_varargs || opcodeID == op_tail_call_forward_arguments)
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);
auto bytecode = instruction->as<Op>();
emitPutCallResult(bytecode);
}
} // namespace JSC
#endif // USE(JSVALUE32_64)
#endif // ENABLE(JIT)