JITPropertyAccess.cpp [plain text]
#include "config.h"
#if ENABLE(JIT)
#include "JIT.h"
#include "CodeBlock.h"
#include "GetterSetter.h"
#include "JITInlineMethods.h"
#include "JITStubCall.h"
#include "JSArray.h"
#include "JSFunction.h"
#include "JSPropertyNameIterator.h"
#include "Interpreter.h"
#include "LinkBuffer.h"
#include "RepatchBuffer.h"
#include "ResultType.h"
#include "SamplingTool.h"
#ifndef NDEBUG
#include <stdio.h>
#endif
using namespace std;
namespace JSC {
#if USE(JSVALUE64)
JIT::CodeRef JIT::stringGetByValStubGenerator(JSGlobalData* globalData)
{
JSInterfaceJIT jit;
JumpList failures;
failures.append(jit.branchPtr(NotEqual, Address(regT0, JSCell::classInfoOffset()), TrustedImmPtr(&JSString::s_info)));
jit.load32(Address(regT0, ThunkHelpers::jsStringLengthOffset()), regT2);
jit.loadPtr(Address(regT0, ThunkHelpers::jsStringValueOffset()), regT0);
failures.append(jit.branchTest32(Zero, regT0));
failures.append(jit.branch32(AboveOrEqual, regT1, regT2));
JumpList is16Bit;
JumpList cont8Bit;
jit.loadPtr(Address(regT0, ThunkHelpers::stringImplFlagsOffset()), regT2);
jit.loadPtr(Address(regT0, ThunkHelpers::stringImplDataOffset()), regT0);
is16Bit.append(jit.branchTest32(Zero, regT2, TrustedImm32(ThunkHelpers::stringImpl8BitFlag())));
jit.load8(BaseIndex(regT0, regT1, TimesOne, 0), regT0);
cont8Bit.append(jit.jump());
is16Bit.link(&jit);
jit.load16(BaseIndex(regT0, regT1, TimesTwo, 0), regT0);
cont8Bit.link(&jit);
failures.append(jit.branch32(AboveOrEqual, regT0, TrustedImm32(0x100)));
jit.move(TrustedImmPtr(globalData->smallStrings.singleCharacterStrings()), regT1);
jit.loadPtr(BaseIndex(regT1, regT0, ScalePtr, 0), regT0);
jit.ret();
failures.link(&jit);
jit.move(TrustedImm32(0), regT0);
jit.ret();
LinkBuffer patchBuffer(*globalData, &jit, GLOBAL_THUNK_ID);
return patchBuffer.finalizeCode();
}
void JIT::emit_op_get_by_val(Instruction* currentInstruction)
{
unsigned dst = currentInstruction[1].u.operand;
unsigned base = currentInstruction[2].u.operand;
unsigned property = currentInstruction[3].u.operand;
emitGetVirtualRegisters(base, regT0, property, regT1);
emitJumpSlowCaseIfNotImmediateInteger(regT1);
zeroExtend32ToPtr(regT1, regT1);
emitJumpSlowCaseIfNotJSCell(regT0, base);
addSlowCase(branchPtr(NotEqual, Address(regT0, JSCell::classInfoOffset()), TrustedImmPtr(&JSArray::s_info)));
loadPtr(Address(regT0, JSArray::storageOffset()), regT2);
addSlowCase(branch32(AboveOrEqual, regT1, Address(regT0, JSArray::vectorLengthOffset())));
loadPtr(BaseIndex(regT2, regT1, ScalePtr, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])), regT0);
addSlowCase(branchTestPtr(Zero, regT0));
emitValueProfilingSite();
emitPutVirtualRegister(dst);
}
void JIT::emitSlow_op_get_by_val(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
unsigned dst = currentInstruction[1].u.operand;
unsigned base = currentInstruction[2].u.operand;
unsigned property = currentInstruction[3].u.operand;
linkSlowCase(iter); linkSlowCaseIfNotJSCell(iter, base); Jump nonCell = jump();
linkSlowCase(iter); Jump notString = branchPtr(NotEqual, Address(regT0, JSCell::classInfoOffset()), TrustedImmPtr(&JSString::s_info));
emitNakedCall(CodeLocationLabel(m_globalData->getCTIStub(stringGetByValStubGenerator).code()));
Jump failed = branchTestPtr(Zero, regT0);
emitPutVirtualRegister(dst, regT0);
emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_get_by_val));
failed.link(this);
notString.link(this);
nonCell.link(this);
linkSlowCase(iter); linkSlowCase(iter);
JITStubCall stubCall(this, cti_op_get_by_val);
stubCall.addArgument(base, regT2);
stubCall.addArgument(property, regT2);
stubCall.call(dst);
emitValueProfilingSite();
}
void JIT::compileGetDirectOffset(RegisterID base, RegisterID result, RegisterID offset, RegisterID scratch)
{
loadPtr(Address(base, JSObject::offsetOfPropertyStorage()), scratch);
loadPtr(BaseIndex(scratch, offset, ScalePtr, 0), result);
}
void JIT::emit_op_get_by_pname(Instruction* currentInstruction)
{
unsigned dst = currentInstruction[1].u.operand;
unsigned base = currentInstruction[2].u.operand;
unsigned property = currentInstruction[3].u.operand;
unsigned expected = currentInstruction[4].u.operand;
unsigned iter = currentInstruction[5].u.operand;
unsigned i = currentInstruction[6].u.operand;
emitGetVirtualRegister(property, regT0);
addSlowCase(branchPtr(NotEqual, regT0, addressFor(expected)));
emitGetVirtualRegisters(base, regT0, iter, regT1);
emitJumpSlowCaseIfNotJSCell(regT0, base);
loadPtr(Address(regT0, JSCell::structureOffset()), regT2);
addSlowCase(branchPtr(NotEqual, regT2, Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_cachedStructure))));
load32(addressFor(i), regT3);
sub32(TrustedImm32(1), regT3);
addSlowCase(branch32(AboveOrEqual, regT3, Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_numCacheableSlots))));
compileGetDirectOffset(regT0, regT0, regT3, regT1);
emitPutVirtualRegister(dst, regT0);
}
void JIT::emitSlow_op_get_by_pname(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
unsigned dst = currentInstruction[1].u.operand;
unsigned base = currentInstruction[2].u.operand;
unsigned property = currentInstruction[3].u.operand;
linkSlowCase(iter);
linkSlowCaseIfNotJSCell(iter, base);
linkSlowCase(iter);
linkSlowCase(iter);
JITStubCall stubCall(this, cti_op_get_by_val);
stubCall.addArgument(base, regT2);
stubCall.addArgument(property, regT2);
stubCall.call(dst);
}
void JIT::emit_op_put_by_val(Instruction* currentInstruction)
{
unsigned base = currentInstruction[1].u.operand;
unsigned property = currentInstruction[2].u.operand;
unsigned value = currentInstruction[3].u.operand;
emitGetVirtualRegisters(base, regT0, property, regT1);
emitJumpSlowCaseIfNotImmediateInteger(regT1);
zeroExtend32ToPtr(regT1, regT1);
emitJumpSlowCaseIfNotJSCell(regT0, base);
addSlowCase(branchPtr(NotEqual, Address(regT0, JSCell::classInfoOffset()), TrustedImmPtr(&JSArray::s_info)));
addSlowCase(branch32(AboveOrEqual, regT1, Address(regT0, JSArray::vectorLengthOffset())));
loadPtr(Address(regT0, JSArray::storageOffset()), regT2);
Jump empty = branchTestPtr(Zero, BaseIndex(regT2, regT1, ScalePtr, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])));
Label storeResult(this);
emitGetVirtualRegister(value, regT3);
storePtr(regT3, BaseIndex(regT2, regT1, ScalePtr, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])));
Jump end = jump();
empty.link(this);
add32(TrustedImm32(1), Address(regT2, OBJECT_OFFSETOF(ArrayStorage, m_numValuesInVector)));
branch32(Below, regT1, Address(regT2, OBJECT_OFFSETOF(ArrayStorage, m_length))).linkTo(storeResult, this);
add32(TrustedImm32(1), regT1);
store32(regT1, Address(regT2, OBJECT_OFFSETOF(ArrayStorage, m_length)));
sub32(TrustedImm32(1), regT1);
jump().linkTo(storeResult, this);
end.link(this);
emitWriteBarrier(regT0, regT3, regT1, regT3, ShouldFilterImmediates, WriteBarrierForPropertyAccess);
}
void JIT::emitSlow_op_put_by_val(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
unsigned base = currentInstruction[1].u.operand;
unsigned property = currentInstruction[2].u.operand;
unsigned value = currentInstruction[3].u.operand;
linkSlowCase(iter); linkSlowCaseIfNotJSCell(iter, base); linkSlowCase(iter); linkSlowCase(iter);
JITStubCall stubPutByValCall(this, cti_op_put_by_val);
stubPutByValCall.addArgument(regT0);
stubPutByValCall.addArgument(property, regT2);
stubPutByValCall.addArgument(value, regT2);
stubPutByValCall.call();
}
void JIT::emit_op_put_by_index(Instruction* currentInstruction)
{
JITStubCall stubCall(this, cti_op_put_by_index);
stubCall.addArgument(currentInstruction[1].u.operand, regT2);
stubCall.addArgument(TrustedImm32(currentInstruction[2].u.operand));
stubCall.addArgument(currentInstruction[3].u.operand, regT2);
stubCall.call();
}
void JIT::emit_op_put_getter_setter(Instruction* currentInstruction)
{
JITStubCall stubCall(this, cti_op_put_getter_setter);
stubCall.addArgument(currentInstruction[1].u.operand, regT2);
stubCall.addArgument(TrustedImmPtr(&m_codeBlock->identifier(currentInstruction[2].u.operand)));
stubCall.addArgument(currentInstruction[3].u.operand, regT2);
stubCall.addArgument(currentInstruction[4].u.operand, regT2);
stubCall.call();
}
void JIT::emit_op_del_by_id(Instruction* currentInstruction)
{
JITStubCall stubCall(this, cti_op_del_by_id);
stubCall.addArgument(currentInstruction[2].u.operand, regT2);
stubCall.addArgument(TrustedImmPtr(&m_codeBlock->identifier(currentInstruction[3].u.operand)));
stubCall.call(currentInstruction[1].u.operand);
}
void JIT::emit_op_method_check(Instruction* currentInstruction)
{
ASSERT(m_interpreter->getOpcodeID((currentInstruction + OPCODE_LENGTH(op_method_check))->u.opcode) == op_get_by_id);
currentInstruction += OPCODE_LENGTH(op_method_check);
unsigned resultVReg = currentInstruction[1].u.operand;
unsigned baseVReg = currentInstruction[2].u.operand;
Identifier* ident = &(m_codeBlock->identifier(currentInstruction[3].u.operand));
emitGetVirtualRegister(baseVReg, regT0);
m_methodCallCompilationInfo.append(MethodCallCompilationInfo(m_bytecodeOffset, m_propertyAccessCompilationInfo.size()));
MethodCallCompilationInfo& info = m_methodCallCompilationInfo.last();
Jump notCell = emitJumpIfNotJSCell(regT0);
BEGIN_UNINTERRUPTED_SEQUENCE(sequenceMethodCheck);
Jump structureCheck = branchPtrWithPatch(NotEqual, Address(regT0, JSCell::structureOffset()), info.structureToCompare, TrustedImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure)));
DataLabelPtr protoStructureToCompare, protoObj = moveWithPatch(TrustedImmPtr(0), regT1);
Jump protoStructureCheck = branchPtrWithPatch(NotEqual, Address(regT1, JSCell::structureOffset()), protoStructureToCompare, TrustedImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure)));
DataLabelPtr putFunction = moveWithPatch(TrustedImmPtr(0), regT0);
END_UNINTERRUPTED_SEQUENCE(sequenceMethodCheck);
Jump match = jump();
notCell.link(this);
structureCheck.link(this);
protoStructureCheck.link(this);
compileGetByIdHotPath(baseVReg, ident);
match.link(this);
emitValueProfilingSite(m_bytecodeOffset + OPCODE_LENGTH(op_method_check));
emitPutVirtualRegister(resultVReg);
m_bytecodeOffset += OPCODE_LENGTH(op_get_by_id);
m_propertyAccessCompilationInfo.last().addMethodCheckInfo(info.structureToCompare, protoObj, protoStructureToCompare, putFunction);
}
void JIT::emitSlow_op_method_check(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
currentInstruction += OPCODE_LENGTH(op_method_check);
unsigned resultVReg = currentInstruction[1].u.operand;
unsigned baseVReg = currentInstruction[2].u.operand;
Identifier* ident = &(m_codeBlock->identifier(currentInstruction[3].u.operand));
compileGetByIdSlowCase(resultVReg, baseVReg, ident, iter, true);
emitValueProfilingSite(m_bytecodeOffset + OPCODE_LENGTH(op_method_check));
m_bytecodeOffset += OPCODE_LENGTH(op_get_by_id);
}
void JIT::emit_op_get_by_id(Instruction* currentInstruction)
{
unsigned resultVReg = currentInstruction[1].u.operand;
unsigned baseVReg = currentInstruction[2].u.operand;
Identifier* ident = &(m_codeBlock->identifier(currentInstruction[3].u.operand));
emitGetVirtualRegister(baseVReg, regT0);
compileGetByIdHotPath(baseVReg, ident);
emitValueProfilingSite();
emitPutVirtualRegister(resultVReg);
}
void JIT::compileGetByIdHotPath(int baseVReg, Identifier*)
{
emitJumpSlowCaseIfNotJSCell(regT0, baseVReg);
BEGIN_UNINTERRUPTED_SEQUENCE(sequenceGetByIdHotPath);
Label hotPathBegin(this);
DataLabelPtr structureToCompare;
PatchableJump structureCheck = patchableBranchPtrWithPatch(NotEqual, Address(regT0, JSCell::structureOffset()), structureToCompare, TrustedImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure)));
addSlowCase(structureCheck);
loadPtr(Address(regT0, JSObject::offsetOfPropertyStorage()), regT0);
DataLabelCompact displacementLabel = loadPtrWithCompactAddressOffsetPatch(Address(regT0, patchGetByIdDefaultOffset), regT0);
Label putResult(this);
END_UNINTERRUPTED_SEQUENCE(sequenceGetByIdHotPath);
m_propertyAccessCompilationInfo.append(PropertyStubCompilationInfo(PropertyStubGetById, m_bytecodeOffset, hotPathBegin, structureToCompare, structureCheck, displacementLabel, putResult));
}
void JIT::emitSlow_op_get_by_id(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
unsigned resultVReg = currentInstruction[1].u.operand;
unsigned baseVReg = currentInstruction[2].u.operand;
Identifier* ident = &(m_codeBlock->identifier(currentInstruction[3].u.operand));
compileGetByIdSlowCase(resultVReg, baseVReg, ident, iter, false);
emitValueProfilingSite();
}
void JIT::compileGetByIdSlowCase(int resultVReg, int baseVReg, Identifier* ident, Vector<SlowCaseEntry>::iterator& iter, bool isMethodCheck)
{
linkSlowCaseIfNotJSCell(iter, baseVReg);
linkSlowCase(iter);
BEGIN_UNINTERRUPTED_SEQUENCE(sequenceGetByIdSlowCase);
Label coldPathBegin(this);
JITStubCall stubCall(this, isMethodCheck ? cti_op_get_by_id_method_check : cti_op_get_by_id);
stubCall.addArgument(regT0);
stubCall.addArgument(TrustedImmPtr(ident));
Call call = stubCall.call(resultVReg);
END_UNINTERRUPTED_SEQUENCE(sequenceGetByIdSlowCase);
m_propertyAccessCompilationInfo[m_propertyAccessInstructionIndex++].slowCaseInfo(PropertyStubGetById, coldPathBegin, call);
}
void JIT::emit_op_put_by_id(Instruction* currentInstruction)
{
unsigned baseVReg = currentInstruction[1].u.operand;
unsigned valueVReg = currentInstruction[3].u.operand;
emitGetVirtualRegisters(baseVReg, regT0, valueVReg, regT1);
emitJumpSlowCaseIfNotJSCell(regT0, baseVReg);
BEGIN_UNINTERRUPTED_SEQUENCE(sequencePutById);
Label hotPathBegin(this);
DataLabelPtr structureToCompare;
addSlowCase(branchPtrWithPatch(NotEqual, Address(regT0, JSCell::structureOffset()), structureToCompare, TrustedImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure))));
loadPtr(Address(regT0, JSObject::offsetOfPropertyStorage()), regT2);
DataLabel32 displacementLabel = storePtrWithAddressOffsetPatch(regT1, Address(regT2, patchPutByIdDefaultOffset));
END_UNINTERRUPTED_SEQUENCE(sequencePutById);
emitWriteBarrier(regT0, regT1, regT2, regT3, ShouldFilterImmediates, WriteBarrierForPropertyAccess);
m_propertyAccessCompilationInfo.append(PropertyStubCompilationInfo(PropertyStubPutById, m_bytecodeOffset, hotPathBegin, structureToCompare, displacementLabel));
}
void JIT::emitSlow_op_put_by_id(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
unsigned baseVReg = currentInstruction[1].u.operand;
Identifier* ident = &(m_codeBlock->identifier(currentInstruction[2].u.operand));
unsigned direct = currentInstruction[8].u.operand;
linkSlowCaseIfNotJSCell(iter, baseVReg);
linkSlowCase(iter);
JITStubCall stubCall(this, direct ? cti_op_put_by_id_direct : cti_op_put_by_id);
stubCall.addArgument(regT0);
stubCall.addArgument(TrustedImmPtr(ident));
stubCall.addArgument(regT1);
Call call = stubCall.call();
m_propertyAccessCompilationInfo[m_propertyAccessInstructionIndex++].slowCaseInfo(PropertyStubPutById, call);
}
void JIT::compilePutDirectOffset(RegisterID base, RegisterID value, size_t cachedOffset)
{
int offset = cachedOffset * sizeof(JSValue);
loadPtr(Address(base, JSObject::offsetOfPropertyStorage()), base);
storePtr(value, Address(base, offset));
}
void JIT::compileGetDirectOffset(RegisterID base, RegisterID result, size_t cachedOffset)
{
int offset = cachedOffset * sizeof(JSValue);
loadPtr(Address(base, JSObject::offsetOfPropertyStorage()), result);
loadPtr(Address(result, offset), result);
}
void JIT::compileGetDirectOffset(JSObject* base, RegisterID result, size_t cachedOffset)
{
loadPtr(base->addressOfPropertyStorage(), result);
loadPtr(Address(result, cachedOffset * sizeof(WriteBarrier<Unknown>)), result);
}
void JIT::privateCompilePutByIdTransition(StructureStubInfo* stubInfo, Structure* oldStructure, Structure* newStructure, size_t cachedOffset, StructureChain* chain, ReturnAddressPtr returnAddress, bool direct)
{
JumpList failureCases;
failureCases.append(emitJumpIfNotJSCell(regT0));
failureCases.append(branchPtr(NotEqual, Address(regT0, JSCell::structureOffset()), TrustedImmPtr(oldStructure)));
testPrototype(oldStructure->storedPrototype(), failureCases);
ASSERT(oldStructure->storedPrototype().isNull() || oldStructure->storedPrototype().asCell()->structure() == chain->head()->get());
if (!direct) {
for (WriteBarrier<Structure>* it = chain->head(); *it; ++it) {
ASSERT((*it)->storedPrototype().isNull() || (*it)->storedPrototype().asCell()->structure() == it[1].get());
testPrototype((*it)->storedPrototype(), failureCases);
}
}
#if ENABLE(VALUE_PROFILER)
if (m_codeBlock->canCompileWithDFG()) {
sub32(
TrustedImm32(1),
AbsoluteAddress(&m_codeBlock->rareCaseProfileForBytecodeOffset(stubInfo->bytecodeIndex)->m_counter));
}
#endif
bool willNeedStorageRealloc = oldStructure->propertyStorageCapacity() != newStructure->propertyStorageCapacity();
if (willNeedStorageRealloc) {
preserveReturnAddressAfterCall(regT3);
JITStubCall stubCall(this, cti_op_put_by_id_transition_realloc);
stubCall.skipArgument(); stubCall.skipArgument(); stubCall.skipArgument(); stubCall.addArgument(TrustedImm32(oldStructure->propertyStorageCapacity()));
stubCall.addArgument(TrustedImmPtr(newStructure));
stubCall.call(regT0);
emitGetJITStubArg(2, regT1);
restoreReturnAddressBeforeReturn(regT3);
}
emitWriteBarrier(regT0, regT1, regT2, regT3, UnconditionalWriteBarrier, WriteBarrierForPropertyAccess);
ASSERT(newStructure->classInfo() == oldStructure->classInfo());
storePtr(TrustedImmPtr(newStructure), Address(regT0, JSCell::structureOffset()));
compilePutDirectOffset(regT0, regT1, cachedOffset);
ret();
ASSERT(!failureCases.empty());
failureCases.link(this);
restoreArgumentReferenceForTrampoline();
Call failureCall = tailRecursiveCall();
LinkBuffer patchBuffer(*m_globalData, this, m_codeBlock);
patchBuffer.link(failureCall, FunctionPtr(direct ? cti_op_put_by_id_direct_fail : cti_op_put_by_id_fail));
if (willNeedStorageRealloc) {
ASSERT(m_calls.size() == 1);
patchBuffer.link(m_calls[0].from, FunctionPtr(cti_op_put_by_id_transition_realloc));
}
stubInfo->stubRoutine = patchBuffer.finalizeCode();
RepatchBuffer repatchBuffer(m_codeBlock);
repatchBuffer.relinkCallerToTrampoline(returnAddress, CodeLocationLabel(stubInfo->stubRoutine.code()));
}
void JIT::patchGetByIdSelf(CodeBlock* codeBlock, StructureStubInfo* stubInfo, Structure* structure, size_t cachedOffset, ReturnAddressPtr returnAddress)
{
RepatchBuffer repatchBuffer(codeBlock);
repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_self_fail));
int offset = sizeof(JSValue) * cachedOffset;
repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelPtrAtOffset(stubInfo->patch.baseline.u.get.structureToCompare), structure);
repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelCompactAtOffset(stubInfo->patch.baseline.u.get.displacementLabel), offset);
}
void JIT::patchPutByIdReplace(CodeBlock* codeBlock, StructureStubInfo* stubInfo, Structure* structure, size_t cachedOffset, ReturnAddressPtr returnAddress, bool direct)
{
RepatchBuffer repatchBuffer(codeBlock);
repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(direct ? cti_op_put_by_id_direct_generic : cti_op_put_by_id_generic));
int offset = sizeof(JSValue) * cachedOffset;
repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelPtrAtOffset(stubInfo->patch.baseline.u.put.structureToCompare), structure);
repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabel32AtOffset(stubInfo->patch.baseline.u.put.displacementLabel), offset);
}
void JIT::privateCompilePatchGetArrayLength(ReturnAddressPtr returnAddress)
{
StructureStubInfo* stubInfo = &m_codeBlock->getStubInfo(returnAddress);
Jump failureCases1 = branchPtr(NotEqual, Address(regT0, JSCell::classInfoOffset()), TrustedImmPtr(&JSArray::s_info));
loadPtr(Address(regT0, JSArray::storageOffset()), regT3);
load32(Address(regT3, OBJECT_OFFSETOF(ArrayStorage, m_length)), regT2);
Jump failureCases2 = branch32(LessThan, regT2, TrustedImm32(0));
emitFastArithIntToImmNoCheck(regT2, regT0);
Jump success = jump();
LinkBuffer patchBuffer(*m_globalData, this, m_codeBlock);
CodeLocationLabel slowCaseBegin = stubInfo->callReturnLocation.labelAtOffset(-stubInfo->patch.baseline.u.get.coldPathBegin);
patchBuffer.link(failureCases1, slowCaseBegin);
patchBuffer.link(failureCases2, slowCaseBegin);
patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(stubInfo->patch.baseline.u.get.putResult));
stubInfo->stubRoutine = patchBuffer.finalizeCode();
CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(stubInfo->patch.baseline.u.get.structureCheck);
RepatchBuffer repatchBuffer(m_codeBlock);
repatchBuffer.relink(jumpLocation, CodeLocationLabel(stubInfo->stubRoutine.code()));
repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_array_fail));
}
void JIT::privateCompileGetByIdProto(StructureStubInfo* stubInfo, Structure* structure, Structure* prototypeStructure, const Identifier& ident, const PropertySlot& slot, size_t cachedOffset, ReturnAddressPtr returnAddress, CallFrame* callFrame)
{
JSObject* protoObject = asObject(structure->prototypeForLookup(callFrame));
Jump failureCases1 = checkStructure(regT0, structure);
move(TrustedImmPtr(protoObject), regT3);
Jump failureCases2 = branchPtr(NotEqual, Address(regT3, JSCell::structureOffset()), TrustedImmPtr(prototypeStructure));
bool needsStubLink = false;
if (slot.cachedPropertyType() == PropertySlot::Getter) {
needsStubLink = true;
compileGetDirectOffset(protoObject, regT1, cachedOffset);
JITStubCall stubCall(this, cti_op_get_by_id_getter_stub);
stubCall.addArgument(regT1);
stubCall.addArgument(regT0);
stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress()));
stubCall.call();
} else if (slot.cachedPropertyType() == PropertySlot::Custom) {
needsStubLink = true;
JITStubCall stubCall(this, cti_op_get_by_id_custom_stub);
stubCall.addArgument(TrustedImmPtr(protoObject));
stubCall.addArgument(TrustedImmPtr(FunctionPtr(slot.customGetter()).executableAddress()));
stubCall.addArgument(TrustedImmPtr(const_cast<Identifier*>(&ident)));
stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress()));
stubCall.call();
} else
compileGetDirectOffset(protoObject, regT0, cachedOffset);
Jump success = jump();
LinkBuffer patchBuffer(*m_globalData, this, m_codeBlock);
CodeLocationLabel slowCaseBegin = stubInfo->callReturnLocation.labelAtOffset(-stubInfo->patch.baseline.u.get.coldPathBegin);
patchBuffer.link(failureCases1, slowCaseBegin);
patchBuffer.link(failureCases2, slowCaseBegin);
patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(stubInfo->patch.baseline.u.get.putResult));
if (needsStubLink) {
for (Vector<CallRecord>::iterator iter = m_calls.begin(); iter != m_calls.end(); ++iter) {
if (iter->to)
patchBuffer.link(iter->from, FunctionPtr(iter->to));
}
}
stubInfo->stubRoutine = patchBuffer.finalizeCode();
CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(stubInfo->patch.baseline.u.get.structureCheck);
RepatchBuffer repatchBuffer(m_codeBlock);
repatchBuffer.relink(jumpLocation, CodeLocationLabel(stubInfo->stubRoutine.code()));
repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_proto_list));
}
void JIT::privateCompileGetByIdSelfList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* polymorphicStructures, int currentIndex, Structure* structure, const Identifier& ident, const PropertySlot& slot, size_t cachedOffset)
{
Jump failureCase = checkStructure(regT0, structure);
bool needsStubLink = false;
bool isDirect = false;
if (slot.cachedPropertyType() == PropertySlot::Getter) {
needsStubLink = true;
compileGetDirectOffset(regT0, regT1, cachedOffset);
JITStubCall stubCall(this, cti_op_get_by_id_getter_stub);
stubCall.addArgument(regT1);
stubCall.addArgument(regT0);
stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress()));
stubCall.call();
} else if (slot.cachedPropertyType() == PropertySlot::Custom) {
needsStubLink = true;
JITStubCall stubCall(this, cti_op_get_by_id_custom_stub);
stubCall.addArgument(regT0);
stubCall.addArgument(TrustedImmPtr(FunctionPtr(slot.customGetter()).executableAddress()));
stubCall.addArgument(TrustedImmPtr(const_cast<Identifier*>(&ident)));
stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress()));
stubCall.call();
} else {
isDirect = true;
compileGetDirectOffset(regT0, regT0, cachedOffset);
}
Jump success = jump();
LinkBuffer patchBuffer(*m_globalData, this, m_codeBlock);
if (needsStubLink) {
for (Vector<CallRecord>::iterator iter = m_calls.begin(); iter != m_calls.end(); ++iter) {
if (iter->to)
patchBuffer.link(iter->from, FunctionPtr(iter->to));
}
}
CodeLocationLabel lastProtoBegin = CodeLocationLabel(polymorphicStructures->list[currentIndex - 1].stubRoutine.code());
if (!lastProtoBegin)
lastProtoBegin = stubInfo->callReturnLocation.labelAtOffset(-stubInfo->patch.baseline.u.get.coldPathBegin);
patchBuffer.link(failureCase, lastProtoBegin);
patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(stubInfo->patch.baseline.u.get.putResult));
MacroAssemblerCodeRef stubCode = patchBuffer.finalizeCode();
polymorphicStructures->list[currentIndex].set(*m_globalData, m_codeBlock->ownerExecutable(), stubCode, structure, isDirect);
CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(stubInfo->patch.baseline.u.get.structureCheck);
RepatchBuffer repatchBuffer(m_codeBlock);
repatchBuffer.relink(jumpLocation, CodeLocationLabel(stubCode.code()));
}
void JIT::privateCompileGetByIdProtoList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* prototypeStructures, int currentIndex, Structure* structure, Structure* prototypeStructure, const Identifier& ident, const PropertySlot& slot, size_t cachedOffset, CallFrame* callFrame)
{
JSObject* protoObject = asObject(structure->prototypeForLookup(callFrame));
Jump failureCases1 = checkStructure(regT0, structure);
move(TrustedImmPtr(protoObject), regT3);
Jump failureCases2 = branchPtr(NotEqual, Address(regT3, JSCell::structureOffset()), TrustedImmPtr(prototypeStructure));
bool needsStubLink = false;
bool isDirect = false;
if (slot.cachedPropertyType() == PropertySlot::Getter) {
needsStubLink = true;
compileGetDirectOffset(protoObject, regT1, cachedOffset);
JITStubCall stubCall(this, cti_op_get_by_id_getter_stub);
stubCall.addArgument(regT1);
stubCall.addArgument(regT0);
stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress()));
stubCall.call();
} else if (slot.cachedPropertyType() == PropertySlot::Custom) {
needsStubLink = true;
JITStubCall stubCall(this, cti_op_get_by_id_custom_stub);
stubCall.addArgument(TrustedImmPtr(protoObject));
stubCall.addArgument(TrustedImmPtr(FunctionPtr(slot.customGetter()).executableAddress()));
stubCall.addArgument(TrustedImmPtr(const_cast<Identifier*>(&ident)));
stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress()));
stubCall.call();
} else {
isDirect = true;
compileGetDirectOffset(protoObject, regT0, cachedOffset);
}
Jump success = jump();
LinkBuffer patchBuffer(*m_globalData, this, m_codeBlock);
if (needsStubLink) {
for (Vector<CallRecord>::iterator iter = m_calls.begin(); iter != m_calls.end(); ++iter) {
if (iter->to)
patchBuffer.link(iter->from, FunctionPtr(iter->to));
}
}
CodeLocationLabel lastProtoBegin = CodeLocationLabel(prototypeStructures->list[currentIndex - 1].stubRoutine.code());
patchBuffer.link(failureCases1, lastProtoBegin);
patchBuffer.link(failureCases2, lastProtoBegin);
patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(stubInfo->patch.baseline.u.get.putResult));
MacroAssemblerCodeRef stubCode = patchBuffer.finalizeCode();
prototypeStructures->list[currentIndex].set(*m_globalData, m_codeBlock->ownerExecutable(), stubCode, structure, prototypeStructure, isDirect);
CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(stubInfo->patch.baseline.u.get.structureCheck);
RepatchBuffer repatchBuffer(m_codeBlock);
repatchBuffer.relink(jumpLocation, CodeLocationLabel(stubCode.code()));
}
void JIT::privateCompileGetByIdChainList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* prototypeStructures, int currentIndex, Structure* structure, StructureChain* chain, size_t count, const Identifier& ident, const PropertySlot& slot, size_t cachedOffset, CallFrame* callFrame)
{
ASSERT(count);
JumpList bucketsOfFail;
Jump baseObjectCheck = checkStructure(regT0, structure);
bucketsOfFail.append(baseObjectCheck);
Structure* currStructure = structure;
WriteBarrier<Structure>* it = chain->head();
JSObject* protoObject = 0;
for (unsigned i = 0; i < count; ++i, ++it) {
protoObject = asObject(currStructure->prototypeForLookup(callFrame));
currStructure = it->get();
testPrototype(protoObject, bucketsOfFail);
}
ASSERT(protoObject);
bool needsStubLink = false;
bool isDirect = false;
if (slot.cachedPropertyType() == PropertySlot::Getter) {
needsStubLink = true;
compileGetDirectOffset(protoObject, regT1, cachedOffset);
JITStubCall stubCall(this, cti_op_get_by_id_getter_stub);
stubCall.addArgument(regT1);
stubCall.addArgument(regT0);
stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress()));
stubCall.call();
} else if (slot.cachedPropertyType() == PropertySlot::Custom) {
needsStubLink = true;
JITStubCall stubCall(this, cti_op_get_by_id_custom_stub);
stubCall.addArgument(TrustedImmPtr(protoObject));
stubCall.addArgument(TrustedImmPtr(FunctionPtr(slot.customGetter()).executableAddress()));
stubCall.addArgument(TrustedImmPtr(const_cast<Identifier*>(&ident)));
stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress()));
stubCall.call();
} else {
isDirect = true;
compileGetDirectOffset(protoObject, regT0, cachedOffset);
}
Jump success = jump();
LinkBuffer patchBuffer(*m_globalData, this, m_codeBlock);
if (needsStubLink) {
for (Vector<CallRecord>::iterator iter = m_calls.begin(); iter != m_calls.end(); ++iter) {
if (iter->to)
patchBuffer.link(iter->from, FunctionPtr(iter->to));
}
}
CodeLocationLabel lastProtoBegin = CodeLocationLabel(prototypeStructures->list[currentIndex - 1].stubRoutine.code());
patchBuffer.link(bucketsOfFail, lastProtoBegin);
patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(stubInfo->patch.baseline.u.get.putResult));
CodeRef stubRoutine = patchBuffer.finalizeCode();
prototypeStructures->list[currentIndex].set(callFrame->globalData(), m_codeBlock->ownerExecutable(), stubRoutine, structure, chain, isDirect);
CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(stubInfo->patch.baseline.u.get.structureCheck);
RepatchBuffer repatchBuffer(m_codeBlock);
repatchBuffer.relink(jumpLocation, CodeLocationLabel(stubRoutine.code()));
}
void JIT::privateCompileGetByIdChain(StructureStubInfo* stubInfo, Structure* structure, StructureChain* chain, size_t count, const Identifier& ident, const PropertySlot& slot, size_t cachedOffset, ReturnAddressPtr returnAddress, CallFrame* callFrame)
{
ASSERT(count);
JumpList bucketsOfFail;
bucketsOfFail.append(checkStructure(regT0, structure));
Structure* currStructure = structure;
WriteBarrier<Structure>* it = chain->head();
JSObject* protoObject = 0;
for (unsigned i = 0; i < count; ++i, ++it) {
protoObject = asObject(currStructure->prototypeForLookup(callFrame));
currStructure = it->get();
testPrototype(protoObject, bucketsOfFail);
}
ASSERT(protoObject);
bool needsStubLink = false;
if (slot.cachedPropertyType() == PropertySlot::Getter) {
needsStubLink = true;
compileGetDirectOffset(protoObject, regT1, cachedOffset);
JITStubCall stubCall(this, cti_op_get_by_id_getter_stub);
stubCall.addArgument(regT1);
stubCall.addArgument(regT0);
stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress()));
stubCall.call();
} else if (slot.cachedPropertyType() == PropertySlot::Custom) {
needsStubLink = true;
JITStubCall stubCall(this, cti_op_get_by_id_custom_stub);
stubCall.addArgument(TrustedImmPtr(protoObject));
stubCall.addArgument(TrustedImmPtr(FunctionPtr(slot.customGetter()).executableAddress()));
stubCall.addArgument(TrustedImmPtr(const_cast<Identifier*>(&ident)));
stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress()));
stubCall.call();
} else
compileGetDirectOffset(protoObject, regT0, cachedOffset);
Jump success = jump();
LinkBuffer patchBuffer(*m_globalData, this, m_codeBlock);
if (needsStubLink) {
for (Vector<CallRecord>::iterator iter = m_calls.begin(); iter != m_calls.end(); ++iter) {
if (iter->to)
patchBuffer.link(iter->from, FunctionPtr(iter->to));
}
}
patchBuffer.link(bucketsOfFail, stubInfo->callReturnLocation.labelAtOffset(-stubInfo->patch.baseline.u.get.coldPathBegin));
patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(stubInfo->patch.baseline.u.get.putResult));
CodeRef stubRoutine = patchBuffer.finalizeCode();
stubInfo->stubRoutine = stubRoutine;
CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(stubInfo->patch.baseline.u.get.structureCheck);
RepatchBuffer repatchBuffer(m_codeBlock);
repatchBuffer.relink(jumpLocation, CodeLocationLabel(stubRoutine.code()));
repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_proto_list));
}
void JIT::emit_op_get_scoped_var(Instruction* currentInstruction)
{
int skip = currentInstruction[3].u.operand;
emitGetFromCallFrameHeaderPtr(RegisterFile::ScopeChain, regT0);
bool checkTopLevel = m_codeBlock->codeType() == FunctionCode && m_codeBlock->needsFullScopeChain();
ASSERT(skip || !checkTopLevel);
if (checkTopLevel && skip--) {
Jump activationNotCreated;
if (checkTopLevel)
activationNotCreated = branchTestPtr(Zero, addressFor(m_codeBlock->activationRegister()));
loadPtr(Address(regT0, OBJECT_OFFSETOF(ScopeChainNode, next)), regT0);
activationNotCreated.link(this);
}
while (skip--)
loadPtr(Address(regT0, OBJECT_OFFSETOF(ScopeChainNode, next)), regT0);
loadPtr(Address(regT0, OBJECT_OFFSETOF(ScopeChainNode, object)), regT0);
loadPtr(Address(regT0, JSVariableObject::offsetOfRegisters()), regT0);
loadPtr(Address(regT0, currentInstruction[2].u.operand * sizeof(Register)), regT0);
emitValueProfilingSite();
emitPutVirtualRegister(currentInstruction[1].u.operand);
}
void JIT::emit_op_put_scoped_var(Instruction* currentInstruction)
{
int skip = currentInstruction[2].u.operand;
emitGetVirtualRegister(currentInstruction[3].u.operand, regT0);
emitGetFromCallFrameHeaderPtr(RegisterFile::ScopeChain, regT1);
bool checkTopLevel = m_codeBlock->codeType() == FunctionCode && m_codeBlock->needsFullScopeChain();
ASSERT(skip || !checkTopLevel);
if (checkTopLevel && skip--) {
Jump activationNotCreated;
if (checkTopLevel)
activationNotCreated = branchTestPtr(Zero, addressFor(m_codeBlock->activationRegister()));
loadPtr(Address(regT1, OBJECT_OFFSETOF(ScopeChainNode, next)), regT1);
activationNotCreated.link(this);
}
while (skip--)
loadPtr(Address(regT1, OBJECT_OFFSETOF(ScopeChainNode, next)), regT1);
loadPtr(Address(regT1, OBJECT_OFFSETOF(ScopeChainNode, object)), regT1);
emitWriteBarrier(regT1, regT0, regT2, regT3, ShouldFilterImmediates, WriteBarrierForVariableAccess);
loadPtr(Address(regT1, JSVariableObject::offsetOfRegisters()), regT1);
storePtr(regT0, Address(regT1, currentInstruction[1].u.operand * sizeof(Register)));
}
void JIT::emit_op_get_global_var(Instruction* currentInstruction)
{
JSVariableObject* globalObject = m_codeBlock->globalObject();
loadPtr(&globalObject->m_registers, regT0);
loadPtr(Address(regT0, currentInstruction[2].u.operand * sizeof(Register)), regT0);
emitValueProfilingSite();
emitPutVirtualRegister(currentInstruction[1].u.operand);
}
void JIT::emit_op_put_global_var(Instruction* currentInstruction)
{
JSGlobalObject* globalObject = m_codeBlock->globalObject();
emitGetVirtualRegister(currentInstruction[2].u.operand, regT0);
move(TrustedImmPtr(globalObject), regT1);
loadPtr(Address(regT1, JSVariableObject::offsetOfRegisters()), regT1);
storePtr(regT0, Address(regT1, currentInstruction[1].u.operand * sizeof(Register)));
emitWriteBarrier(globalObject, regT0, regT2, ShouldFilterImmediates, WriteBarrierForVariableAccess);
}
void JIT::resetPatchGetById(RepatchBuffer& repatchBuffer, StructureStubInfo* stubInfo)
{
repatchBuffer.relink(stubInfo->callReturnLocation, cti_op_get_by_id);
repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelPtrAtOffset(stubInfo->patch.baseline.u.get.structureToCompare), reinterpret_cast<void*>(-1));
repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelCompactAtOffset(stubInfo->patch.baseline.u.get.displacementLabel), 0);
repatchBuffer.relink(stubInfo->hotPathBegin.jumpAtOffset(stubInfo->patch.baseline.u.get.structureCheck), stubInfo->callReturnLocation.labelAtOffset(-stubInfo->patch.baseline.u.get.coldPathBegin));
}
void JIT::resetPatchPutById(RepatchBuffer& repatchBuffer, StructureStubInfo* stubInfo)
{
if (isDirectPutById(stubInfo))
repatchBuffer.relink(stubInfo->callReturnLocation, cti_op_put_by_id_direct);
else
repatchBuffer.relink(stubInfo->callReturnLocation, cti_op_put_by_id);
repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelPtrAtOffset(stubInfo->patch.baseline.u.put.structureToCompare), reinterpret_cast<void*>(-1));
repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelCompactAtOffset(stubInfo->patch.baseline.u.put.displacementLabel), 0);
}
#endif // USE(JSVALUE64)
void JIT::emitWriteBarrier(RegisterID owner, RegisterID value, RegisterID scratch, RegisterID scratch2, WriteBarrierMode mode, WriteBarrierUseKind useKind)
{
UNUSED_PARAM(owner);
UNUSED_PARAM(scratch);
UNUSED_PARAM(scratch2);
UNUSED_PARAM(useKind);
UNUSED_PARAM(value);
UNUSED_PARAM(mode);
ASSERT(owner != scratch);
ASSERT(owner != scratch2);
#if ENABLE(WRITE_BARRIER_PROFILING)
emitCount(WriteBarrierCounters::jitCounterFor(useKind));
#endif
#if ENABLE(GGC)
Jump filterCells;
if (mode == ShouldFilterImmediates)
filterCells = emitJumpIfNotJSCell(value);
move(owner, scratch);
andPtr(TrustedImm32(static_cast<int32_t>(MarkedBlock::blockMask)), scratch);
move(owner, scratch2);
rshift32(TrustedImm32(MarkedBlock::atomShift + 8), scratch2);
andPtr(TrustedImm32(MarkedBlock::atomMask >> 8), scratch2);
Jump filter = branchTest8(Zero, BaseIndex(scratch, scratch2, TimesOne, MarkedBlock::offsetOfMarks()));
move(owner, scratch2);
rshift32(TrustedImm32(MarkedBlock::cardShift), scratch2);
andPtr(TrustedImm32(MarkedBlock::cardMask), scratch2);
store8(TrustedImm32(1), BaseIndex(scratch, scratch2, TimesOne, MarkedBlock::offsetOfCards()));
filter.link(this);
if (mode == ShouldFilterImmediates)
filterCells.link(this);
#endif
}
void JIT::emitWriteBarrier(JSCell* owner, RegisterID value, RegisterID scratch, WriteBarrierMode mode, WriteBarrierUseKind useKind)
{
UNUSED_PARAM(owner);
UNUSED_PARAM(scratch);
UNUSED_PARAM(useKind);
UNUSED_PARAM(value);
UNUSED_PARAM(mode);
#if ENABLE(WRITE_BARRIER_PROFILING)
emitCount(WriteBarrierCounters::jitCounterFor(useKind));
#endif
#if ENABLE(GGC)
Jump filterCells;
if (mode == ShouldFilterImmediates)
filterCells = emitJumpIfNotJSCell(value);
uint8_t* cardAddress = Heap::addressOfCardFor(owner);
move(TrustedImmPtr(cardAddress), scratch);
store8(TrustedImm32(1), Address(scratch));
if (mode == ShouldFilterImmediates)
filterCells.link(this);
#endif
}
void JIT::testPrototype(JSValue prototype, JumpList& failureCases)
{
if (prototype.isNull())
return;
ASSERT(prototype.isCell());
move(TrustedImmPtr(prototype.asCell()), regT3);
failureCases.append(branchPtr(NotEqual, Address(regT3, JSCell::structureOffset()), TrustedImmPtr(prototype.asCell()->structure())));
}
void JIT::patchMethodCallProto(JSGlobalData& globalData, CodeBlock* codeBlock, MethodCallLinkInfo& methodCallLinkInfo, StructureStubInfo& stubInfo, JSObject* callee, Structure* structure, JSObject* proto, ReturnAddressPtr returnAddress)
{
RepatchBuffer repatchBuffer(codeBlock);
CodeLocationDataLabelPtr structureLocation = methodCallLinkInfo.cachedStructure.location();
methodCallLinkInfo.cachedStructure.set(globalData, structureLocation, codeBlock->ownerExecutable(), structure);
Structure* prototypeStructure = proto->structure();
methodCallLinkInfo.cachedPrototypeStructure.set(globalData, structureLocation.dataLabelPtrAtOffset(stubInfo.patch.baseline.methodCheckProtoStructureToCompare), codeBlock->ownerExecutable(), prototypeStructure);
methodCallLinkInfo.cachedPrototype.set(globalData, structureLocation.dataLabelPtrAtOffset(stubInfo.patch.baseline.methodCheckProtoObj), codeBlock->ownerExecutable(), proto);
methodCallLinkInfo.cachedFunction.set(globalData, structureLocation.dataLabelPtrAtOffset(stubInfo.patch.baseline.methodCheckPutFunction), codeBlock->ownerExecutable(), callee);
repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_method_check_update));
}
bool JIT::isDirectPutById(StructureStubInfo* stubInfo)
{
switch (stubInfo->accessType) {
case access_put_by_id_transition_normal:
return false;
case access_put_by_id_transition_direct:
return true;
case access_put_by_id_replace:
case access_put_by_id_generic: {
void* oldCall = MacroAssembler::readCallTarget(stubInfo->callReturnLocation).executableAddress();
if (oldCall == bitwise_cast<void*>(cti_op_put_by_id_direct)
|| oldCall == bitwise_cast<void*>(cti_op_put_by_id_direct_generic)
|| oldCall == bitwise_cast<void*>(cti_op_put_by_id_direct_fail))
return true;
ASSERT(oldCall == bitwise_cast<void*>(cti_op_put_by_id)
|| oldCall == bitwise_cast<void*>(cti_op_put_by_id_generic)
|| oldCall == bitwise_cast<void*>(cti_op_put_by_id_fail));
return false;
}
default:
ASSERT_NOT_REACHED();
return false;
}
}
}
#endif // ENABLE(JIT)