JITPropertyAccess32_64.cpp [plain text]
#include "config.h"
#if ENABLE(JIT)
#if USE(JSVALUE32_64)
#include "JIT.h"
#include "CodeBlock.h"
#include "GCAwareJITStubRoutine.h"
#include "Interpreter.h"
#include "JITInlines.h"
#include "JITStubCall.h"
#include "JSArray.h"
#include "JSFunction.h"
#include "JSPropertyNameIterator.h"
#include "JSVariableObject.h"
#include "LinkBuffer.h"
#include "RepatchBuffer.h"
#include "ResultType.h"
#include "SamplingTool.h"
#include <wtf/StringPrintStream.h>
#ifndef NDEBUG
#include <stdio.h>
#endif
using namespace std;
namespace JSC {
void JIT::emit_op_put_by_index(Instruction* currentInstruction)
{
unsigned base = currentInstruction[1].u.operand;
unsigned property = currentInstruction[2].u.operand;
unsigned value = currentInstruction[3].u.operand;
JITStubCall stubCall(this, cti_op_put_by_index);
stubCall.addArgument(base);
stubCall.addArgument(TrustedImm32(property));
stubCall.addArgument(value);
stubCall.call();
}
void JIT::emit_op_put_getter_setter(Instruction* currentInstruction)
{
unsigned base = currentInstruction[1].u.operand;
unsigned property = currentInstruction[2].u.operand;
unsigned getter = currentInstruction[3].u.operand;
unsigned setter = currentInstruction[4].u.operand;
JITStubCall stubCall(this, cti_op_put_getter_setter);
stubCall.addArgument(base);
stubCall.addArgument(TrustedImmPtr(&m_codeBlock->identifier(property)));
stubCall.addArgument(getter);
stubCall.addArgument(setter);
stubCall.call();
}
void JIT::emit_op_del_by_id(Instruction* currentInstruction)
{
unsigned dst = currentInstruction[1].u.operand;
unsigned base = currentInstruction[2].u.operand;
unsigned property = currentInstruction[3].u.operand;
JITStubCall stubCall(this, cti_op_del_by_id);
stubCall.addArgument(base);
stubCall.addArgument(TrustedImmPtr(&m_codeBlock->identifier(property)));
stubCall.call(dst);
}
JIT::CodeRef JIT::stringGetByValStubGenerator(VM* vm)
{
JSInterfaceJIT jit;
JumpList failures;
failures.append(jit.branchPtr(NotEqual, Address(regT0, JSCell::structureOffset()), TrustedImmPtr(vm->stringStructure.get())));
jit.load32(Address(regT0, ThunkHelpers::jsStringLengthOffset()), regT1);
jit.loadPtr(Address(regT0, ThunkHelpers::jsStringValueOffset()), regT0);
failures.append(jit.branchTest32(Zero, regT0));
failures.append(jit.branch32(AboveOrEqual, regT2, regT1));
JumpList is16Bit;
JumpList cont8Bit;
jit.loadPtr(Address(regT0, StringImpl::flagsOffset()), regT1);
jit.loadPtr(Address(regT0, StringImpl::dataOffset()), regT0);
is16Bit.append(jit.branchTest32(Zero, regT1, TrustedImm32(StringImpl::flagIs8Bit())));
jit.load8(BaseIndex(regT0, regT2, TimesOne, 0), regT0);
cont8Bit.append(jit.jump());
is16Bit.link(&jit);
jit.load16(BaseIndex(regT0, regT2, TimesTwo, 0), regT0);
cont8Bit.link(&jit);
failures.append(jit.branch32(AboveOrEqual, regT0, TrustedImm32(0x100)));
jit.move(TrustedImmPtr(vm->smallStrings.singleCharacterStrings()), regT1);
jit.loadPtr(BaseIndex(regT1, regT0, ScalePtr, 0), regT0);
jit.move(TrustedImm32(JSValue::CellTag), regT1); jit.ret();
failures.link(&jit);
jit.move(TrustedImm32(0), regT0);
jit.ret();
LinkBuffer patchBuffer(*vm, &jit, GLOBAL_THUNK_ID);
return FINALIZE_CODE(patchBuffer, ("String get_by_val stub"));
}
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;
ArrayProfile* profile = currentInstruction[4].u.arrayProfile;
emitLoad2(base, regT1, regT0, property, regT3, regT2);
addSlowCase(branch32(NotEqual, regT3, TrustedImm32(JSValue::Int32Tag)));
emitJumpSlowCaseIfNotJSCell(base, regT1);
loadPtr(Address(regT0, JSCell::structureOffset()), regT1);
emitArrayProfilingSite(regT1, regT3, profile);
and32(TrustedImm32(IndexingShapeMask), regT1);
PatchableJump badType;
JumpList slowCases;
JITArrayMode mode = chooseArrayMode(profile);
switch (mode) {
case JITInt32:
slowCases = emitInt32GetByVal(currentInstruction, badType);
break;
case JITDouble:
slowCases = emitDoubleGetByVal(currentInstruction, badType);
break;
case JITContiguous:
slowCases = emitContiguousGetByVal(currentInstruction, badType);
break;
case JITArrayStorage:
slowCases = emitArrayStorageGetByVal(currentInstruction, badType);
break;
default:
CRASH();
}
addSlowCase(badType);
addSlowCase(slowCases);
Label done = label();
#if !ASSERT_DISABLED
Jump resultOK = branch32(NotEqual, regT1, TrustedImm32(JSValue::EmptyValueTag));
breakpoint();
resultOK.link(this);
#endif
emitValueProfilingSite();
emitStore(dst, regT1, regT0);
map(m_bytecodeOffset + OPCODE_LENGTH(op_get_by_val), dst, regT1, regT0);
m_byValCompilationInfo.append(ByValCompilationInfo(m_bytecodeOffset, badType, mode, done));
}
JIT::JumpList JIT::emitContiguousGetByVal(Instruction*, PatchableJump& badType, IndexingType expectedShape)
{
JumpList slowCases;
badType = patchableBranch32(NotEqual, regT1, TrustedImm32(expectedShape));
loadPtr(Address(regT0, JSObject::butterflyOffset()), regT3);
slowCases.append(branch32(AboveOrEqual, regT2, Address(regT3, Butterfly::offsetOfPublicLength())));
load32(BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.tag)), regT1); load32(BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.payload)), regT0); slowCases.append(branch32(Equal, regT1, TrustedImm32(JSValue::EmptyValueTag)));
return slowCases;
}
JIT::JumpList JIT::emitDoubleGetByVal(Instruction*, PatchableJump& badType)
{
JumpList slowCases;
badType = patchableBranch32(NotEqual, regT1, TrustedImm32(DoubleShape));
loadPtr(Address(regT0, JSObject::butterflyOffset()), regT3);
slowCases.append(branch32(AboveOrEqual, regT2, Address(regT3, Butterfly::offsetOfPublicLength())));
loadDouble(BaseIndex(regT3, regT2, TimesEight), fpRegT0);
slowCases.append(branchDouble(DoubleNotEqualOrUnordered, fpRegT0, fpRegT0));
moveDoubleToInts(fpRegT0, regT0, regT1);
return slowCases;
}
JIT::JumpList JIT::emitArrayStorageGetByVal(Instruction*, PatchableJump& badType)
{
JumpList slowCases;
add32(TrustedImm32(-ArrayStorageShape), regT1, regT3);
badType = patchableBranch32(Above, regT3, TrustedImm32(SlowPutArrayStorageShape - ArrayStorageShape));
loadPtr(Address(regT0, JSObject::butterflyOffset()), regT3);
slowCases.append(branch32(AboveOrEqual, regT2, Address(regT3, ArrayStorage::vectorLengthOffset())));
load32(BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), regT1); load32(BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + OBJECT_OFFSETOF(JSValue, u.asBits.payload)), regT0); slowCases.append(branch32(Equal, regT1, TrustedImm32(JSValue::EmptyValueTag)));
return slowCases;
}
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;
ArrayProfile* profile = currentInstruction[4].u.arrayProfile;
linkSlowCase(iter); linkSlowCaseIfNotJSCell(iter, base);
Jump nonCell = jump();
linkSlowCase(iter); Jump notString = branchPtr(NotEqual, Address(regT0, JSCell::structureOffset()), TrustedImmPtr(m_vm->stringStructure.get()));
emitNakedCall(m_vm->getCTIStub(stringGetByValStubGenerator).code());
Jump failed = branchTestPtr(Zero, regT0);
emitStore(dst, regT1, regT0);
emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_get_by_val));
failed.link(this);
notString.link(this);
nonCell.link(this);
Jump skipProfiling = jump();
linkSlowCase(iter); linkSlowCase(iter);
emitArrayProfileOutOfBoundsSpecialCase(profile);
skipProfiling.link(this);
Label slowPath = label();
JITStubCall stubCall(this, cti_op_get_by_val);
stubCall.addArgument(base);
stubCall.addArgument(property);
Call call = stubCall.call(dst);
m_byValCompilationInfo[m_byValInstructionIndex].slowPathTarget = slowPath;
m_byValCompilationInfo[m_byValInstructionIndex].returnAddress = call;
m_byValInstructionIndex++;
emitValueProfilingSite();
}
void JIT::emit_op_put_by_val(Instruction* currentInstruction)
{
unsigned base = currentInstruction[1].u.operand;
unsigned property = currentInstruction[2].u.operand;
ArrayProfile* profile = currentInstruction[4].u.arrayProfile;
emitLoad2(base, regT1, regT0, property, regT3, regT2);
addSlowCase(branch32(NotEqual, regT3, TrustedImm32(JSValue::Int32Tag)));
emitJumpSlowCaseIfNotJSCell(base, regT1);
loadPtr(Address(regT0, JSCell::structureOffset()), regT1);
emitArrayProfilingSite(regT1, regT3, profile);
and32(TrustedImm32(IndexingShapeMask), regT1);
PatchableJump badType;
JumpList slowCases;
JITArrayMode mode = chooseArrayMode(profile);
switch (mode) {
case JITInt32:
slowCases = emitInt32PutByVal(currentInstruction, badType);
break;
case JITDouble:
slowCases = emitDoublePutByVal(currentInstruction, badType);
break;
case JITContiguous:
slowCases = emitContiguousPutByVal(currentInstruction, badType);
break;
case JITArrayStorage:
slowCases = emitArrayStoragePutByVal(currentInstruction, badType);
break;
default:
CRASH();
break;
}
addSlowCase(badType);
addSlowCase(slowCases);
Label done = label();
m_byValCompilationInfo.append(ByValCompilationInfo(m_bytecodeOffset, badType, mode, done));
}
JIT::JumpList JIT::emitGenericContiguousPutByVal(Instruction* currentInstruction, PatchableJump& badType, IndexingType indexingShape)
{
unsigned value = currentInstruction[3].u.operand;
ArrayProfile* profile = currentInstruction[4].u.arrayProfile;
JumpList slowCases;
badType = patchableBranch32(NotEqual, regT1, TrustedImm32(ContiguousShape));
loadPtr(Address(regT0, JSObject::butterflyOffset()), regT3);
Jump outOfBounds = branch32(AboveOrEqual, regT2, Address(regT3, Butterfly::offsetOfPublicLength()));
Label storeResult = label();
emitLoad(value, regT1, regT0);
switch (indexingShape) {
case Int32Shape:
slowCases.append(branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag)));
case ContiguousShape:
store32(regT0, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.payload)));
store32(regT1, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.tag)));
break;
case DoubleShape: {
Jump notInt = branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag));
convertInt32ToDouble(regT0, fpRegT0);
Jump ready = jump();
notInt.link(this);
moveIntsToDouble(regT0, regT1, fpRegT0, fpRegT1);
slowCases.append(branchDouble(DoubleNotEqualOrUnordered, fpRegT0, fpRegT0));
ready.link(this);
storeDouble(fpRegT0, BaseIndex(regT3, regT2, TimesEight));
break;
}
default:
CRASH();
break;
}
Jump done = jump();
outOfBounds.link(this);
slowCases.append(branch32(AboveOrEqual, regT2, Address(regT3, Butterfly::offsetOfVectorLength())));
emitArrayProfileStoreToHoleSpecialCase(profile);
add32(TrustedImm32(1), regT2, regT1);
store32(regT1, Address(regT3, Butterfly::offsetOfPublicLength()));
jump().linkTo(storeResult, this);
done.link(this);
emitWriteBarrier(regT0, regT1, regT1, regT3, UnconditionalWriteBarrier, WriteBarrierForPropertyAccess);
return slowCases;
}
JIT::JumpList JIT::emitArrayStoragePutByVal(Instruction* currentInstruction, PatchableJump& badType)
{
unsigned value = currentInstruction[3].u.operand;
ArrayProfile* profile = currentInstruction[4].u.arrayProfile;
JumpList slowCases;
badType = patchableBranch32(NotEqual, regT1, TrustedImm32(ArrayStorageShape));
loadPtr(Address(regT0, JSObject::butterflyOffset()), regT3);
slowCases.append(branch32(AboveOrEqual, regT2, Address(regT3, ArrayStorage::vectorLengthOffset())));
Jump empty = branch32(Equal, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), TrustedImm32(JSValue::EmptyValueTag));
Label storeResult(this);
emitLoad(value, regT1, regT0);
store32(regT0, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + OBJECT_OFFSETOF(JSValue, u.asBits.payload))); store32(regT1, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + OBJECT_OFFSETOF(JSValue, u.asBits.tag))); Jump end = jump();
empty.link(this);
emitArrayProfileStoreToHoleSpecialCase(profile);
add32(TrustedImm32(1), Address(regT3, OBJECT_OFFSETOF(ArrayStorage, m_numValuesInVector)));
branch32(Below, regT2, Address(regT3, ArrayStorage::lengthOffset())).linkTo(storeResult, this);
add32(TrustedImm32(1), regT2, regT0);
store32(regT0, Address(regT3, ArrayStorage::lengthOffset()));
jump().linkTo(storeResult, this);
end.link(this);
emitWriteBarrier(regT0, regT1, regT1, regT3, UnconditionalWriteBarrier, WriteBarrierForPropertyAccess);
return slowCases;
}
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;
ArrayProfile* profile = currentInstruction[4].u.arrayProfile;
linkSlowCase(iter); linkSlowCaseIfNotJSCell(iter, base); linkSlowCase(iter);
JITArrayMode mode = chooseArrayMode(profile);
switch (mode) {
case JITInt32:
case JITDouble:
linkSlowCase(iter); break;
default:
break;
}
Jump skipProfiling = jump();
linkSlowCase(iter); emitArrayProfileOutOfBoundsSpecialCase(profile);
skipProfiling.link(this);
Label slowPath = label();
JITStubCall stubPutByValCall(this, cti_op_put_by_val);
stubPutByValCall.addArgument(base);
stubPutByValCall.addArgument(property);
stubPutByValCall.addArgument(value);
Call call = stubPutByValCall.call();
m_byValCompilationInfo[m_byValInstructionIndex].slowPathTarget = slowPath;
m_byValCompilationInfo[m_byValInstructionIndex].returnAddress = call;
m_byValInstructionIndex++;
}
void JIT::emit_op_get_by_id(Instruction* currentInstruction)
{
int dst = currentInstruction[1].u.operand;
int base = currentInstruction[2].u.operand;
Identifier* ident = &(m_codeBlock->identifier(currentInstruction[3].u.operand));
emitLoad(base, regT1, regT0);
emitJumpSlowCaseIfNotJSCell(base, regT1);
compileGetByIdHotPath(ident);
emitValueProfilingSite();
emitStore(dst, regT1, regT0);
map(m_bytecodeOffset + OPCODE_LENGTH(op_get_by_id), dst, regT1, regT0);
}
void JIT::compileGetByIdHotPath(Identifier* ident)
{
if (*ident == m_vm->propertyNames->length && shouldEmitProfiling()) {
loadPtr(Address(regT0, JSCell::structureOffset()), regT2);
emitArrayProfilingSiteForBytecodeIndex(regT2, regT3, m_bytecodeOffset);
}
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);
ConvertibleLoadLabel propertyStorageLoad = convertibleLoadPtr(Address(regT0, JSObject::butterflyOffset()), regT2);
DataLabelCompact displacementLabel1 = loadPtrWithCompactAddressOffsetPatch(Address(regT2, patchGetByIdDefaultOffset), regT0); DataLabelCompact displacementLabel2 = loadPtrWithCompactAddressOffsetPatch(Address(regT2, patchGetByIdDefaultOffset), regT1);
Label putResult(this);
END_UNINTERRUPTED_SEQUENCE(sequenceGetByIdHotPath);
m_propertyAccessCompilationInfo.append(PropertyStubCompilationInfo(PropertyStubGetById, m_bytecodeOffset, hotPathBegin, structureToCompare, structureCheck, propertyStorageLoad, displacementLabel1, displacementLabel2, putResult));
}
void JIT::emitSlow_op_get_by_id(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
int dst = currentInstruction[1].u.operand;
int base = currentInstruction[2].u.operand;
int ident = currentInstruction[3].u.operand;
compileGetByIdSlowCase(dst, base, &(m_codeBlock->identifier(ident)), iter);
emitValueProfilingSite();
}
void JIT::compileGetByIdSlowCase(int dst, int base, Identifier* ident, Vector<SlowCaseEntry>::iterator& iter)
{
linkSlowCaseIfNotJSCell(iter, base);
linkSlowCase(iter);
BEGIN_UNINTERRUPTED_SEQUENCE(sequenceGetByIdSlowCase);
Label coldPathBegin(this);
JITStubCall stubCall(this, cti_op_get_by_id);
stubCall.addArgument(regT1, regT0);
stubCall.addArgument(TrustedImmPtr(ident));
Call call = stubCall.call(dst);
END_UNINTERRUPTED_SEQUENCE_FOR_PUT(sequenceGetByIdSlowCase, dst);
m_propertyAccessCompilationInfo[m_propertyAccessInstructionIndex++].slowCaseInfo(PropertyStubGetById, coldPathBegin, call);
}
void JIT::emit_op_put_by_id(Instruction* currentInstruction)
{
int base = currentInstruction[1].u.operand;
int value = currentInstruction[3].u.operand;
emitLoad2(base, regT1, regT0, value, regT3, regT2);
emitJumpSlowCaseIfNotJSCell(base, regT1);
BEGIN_UNINTERRUPTED_SEQUENCE(sequencePutById);
Label hotPathBegin(this);
DataLabelPtr structureToCompare;
addSlowCase(branchPtrWithPatch(NotEqual, Address(regT0, JSCell::structureOffset()), structureToCompare, TrustedImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure))));
ConvertibleLoadLabel propertyStorageLoad = convertibleLoadPtr(Address(regT0, JSObject::butterflyOffset()), regT1);
DataLabel32 displacementLabel1 = storePtrWithAddressOffsetPatch(regT2, Address(regT1, patchPutByIdDefaultOffset)); DataLabel32 displacementLabel2 = storePtrWithAddressOffsetPatch(regT3, Address(regT1, patchPutByIdDefaultOffset));
END_UNINTERRUPTED_SEQUENCE(sequencePutById);
emitWriteBarrier(regT0, regT2, regT1, regT2, ShouldFilterImmediates, WriteBarrierForPropertyAccess);
m_propertyAccessCompilationInfo.append(PropertyStubCompilationInfo(PropertyStubPutById, m_bytecodeOffset, hotPathBegin, structureToCompare, propertyStorageLoad, displacementLabel1, displacementLabel2));
}
void JIT::emitSlow_op_put_by_id(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
int base = currentInstruction[1].u.operand;
int ident = currentInstruction[2].u.operand;
int direct = currentInstruction[8].u.operand;
linkSlowCaseIfNotJSCell(iter, base);
linkSlowCase(iter);
JITStubCall stubCall(this, direct ? cti_op_put_by_id_direct : cti_op_put_by_id);
stubCall.addArgument(base);
stubCall.addArgument(TrustedImmPtr(&(m_codeBlock->identifier(ident))));
stubCall.addArgument(regT3, regT2);
Call call = stubCall.call();
m_propertyAccessCompilationInfo[m_propertyAccessInstructionIndex++].slowCaseInfo(PropertyStubPutById, call);
}
void JIT::compilePutDirectOffset(RegisterID base, RegisterID valueTag, RegisterID valuePayload, PropertyOffset cachedOffset)
{
if (isOutOfLineOffset(cachedOffset))
loadPtr(Address(base, JSObject::butterflyOffset()), base);
emitStore(indexRelativeToBase(cachedOffset), valueTag, valuePayload, base);
}
void JIT::compileGetDirectOffset(RegisterID base, RegisterID resultTag, RegisterID resultPayload, PropertyOffset cachedOffset)
{
if (isInlineOffset(cachedOffset)) {
emitLoad(indexRelativeToBase(cachedOffset), resultTag, resultPayload, base);
return;
}
RegisterID temp = resultPayload;
loadPtr(Address(base, JSObject::butterflyOffset()), temp);
emitLoad(indexRelativeToBase(cachedOffset), resultTag, resultPayload, temp);
}
void JIT::compileGetDirectOffset(JSObject* base, RegisterID resultTag, RegisterID resultPayload, PropertyOffset cachedOffset)
{
if (isInlineOffset(cachedOffset)) {
move(TrustedImmPtr(base->locationForOffset(cachedOffset)), resultTag);
load32(Address(resultTag, OBJECT_OFFSETOF(JSValue, u.asBits.payload)), resultPayload);
load32(Address(resultTag, OBJECT_OFFSETOF(JSValue, u.asBits.tag)), resultTag);
return;
}
loadPtr(base->butterflyAddress(), resultTag);
load32(Address(resultTag, offsetInButterfly(cachedOffset) * sizeof(WriteBarrier<Unknown>) + OBJECT_OFFSETOF(JSValue, u.asBits.payload)), resultPayload);
load32(Address(resultTag, offsetInButterfly(cachedOffset) * sizeof(WriteBarrier<Unknown>) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), resultTag);
}
void JIT::privateCompilePutByIdTransition(StructureStubInfo* stubInfo, Structure* oldStructure, Structure* newStructure, PropertyOffset cachedOffset, StructureChain* chain, ReturnAddressPtr returnAddress, bool direct)
{
#if CPU(MIPS) || CPU(SH4) || CPU(ARM)
load32(Address(stackPointerRegister, OBJECT_OFFSETOF(JITStackFrame, args[0]) + OBJECT_OFFSETOF(JSValue, u.asBits.payload)), regT0);
load32(Address(stackPointerRegister, OBJECT_OFFSETOF(JITStackFrame, args[0]) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), regT1);
#else
load32(Address(stackPointerRegister, OBJECT_OFFSETOF(JITStackFrame, args[0]) + sizeof(void*) + OBJECT_OFFSETOF(JSValue, u.asBits.payload)), regT0);
load32(Address(stackPointerRegister, OBJECT_OFFSETOF(JITStackFrame, args[0]) + sizeof(void*) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), regT1);
#endif
JumpList failureCases;
failureCases.append(branch32(NotEqual, regT1, TrustedImm32(JSValue::CellTag)));
failureCases.append(branchPtr(NotEqual, Address(regT0, JSCell::structureOffset()), TrustedImmPtr(oldStructure)));
testPrototype(oldStructure->storedPrototype(), failureCases, stubInfo);
if (!direct) {
for (WriteBarrier<Structure>* it = chain->head(); *it; ++it)
testPrototype((*it)->storedPrototype(), failureCases, stubInfo);
}
#if ENABLE(VALUE_PROFILER)
if (m_codeBlock->canCompileWithDFG() >= DFG::MayInline) {
sub32(
TrustedImm32(1),
AbsoluteAddress(&m_codeBlock->rareCaseProfileForBytecodeOffset(stubInfo->bytecodeIndex)->m_counter));
}
#endif
Call callTarget;
bool willNeedStorageRealloc = oldStructure->outOfLineCapacity() != newStructure->outOfLineCapacity();
if (willNeedStorageRealloc) {
preserveReturnAddressAfterCall(regT3);
JITStubCall stubCall(this, cti_op_put_by_id_transition_realloc);
stubCall.skipArgument(); stubCall.skipArgument(); stubCall.skipArgument(); stubCall.addArgument(TrustedImm32(oldStructure->outOfLineCapacity()));
stubCall.addArgument(TrustedImmPtr(newStructure));
stubCall.call(regT0);
restoreReturnAddressBeforeReturn(regT3);
#if CPU(MIPS) || CPU(SH4) || CPU(ARM)
load32(Address(stackPointerRegister, OBJECT_OFFSETOF(JITStackFrame, args[0]) + OBJECT_OFFSETOF(JSValue, u.asBits.payload)), regT0);
load32(Address(stackPointerRegister, OBJECT_OFFSETOF(JITStackFrame, args[0]) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), regT1);
#else
load32(Address(stackPointerRegister, OBJECT_OFFSETOF(JITStackFrame, args[0]) + sizeof(void*) + OBJECT_OFFSETOF(JSValue, u.asBits.payload)), regT0);
load32(Address(stackPointerRegister, OBJECT_OFFSETOF(JITStackFrame, args[0]) + sizeof(void*) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), regT1);
#endif
}
emitWriteBarrier(regT0, regT1, regT1, regT3, UnconditionalWriteBarrier, WriteBarrierForPropertyAccess);
storePtr(TrustedImmPtr(newStructure), Address(regT0, JSCell::structureOffset()));
#if CPU(MIPS) || CPU(SH4) || CPU(ARM)
load32(Address(stackPointerRegister, OBJECT_OFFSETOF(JITStackFrame, args[2]) + OBJECT_OFFSETOF(JSValue, u.asBits.payload)), regT3);
load32(Address(stackPointerRegister, OBJECT_OFFSETOF(JITStackFrame, args[2]) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), regT2);
#else
load32(Address(stackPointerRegister, OBJECT_OFFSETOF(JITStackFrame, args[2]) + sizeof(void*) + OBJECT_OFFSETOF(JSValue, u.asBits.payload)), regT3);
load32(Address(stackPointerRegister, OBJECT_OFFSETOF(JITStackFrame, args[2]) + sizeof(void*) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), regT2);
#endif
compilePutDirectOffset(regT0, regT2, regT3, cachedOffset);
ret();
ASSERT(!failureCases.empty());
failureCases.link(this);
restoreArgumentReferenceForTrampoline();
Call failureCall = tailRecursiveCall();
LinkBuffer patchBuffer(*m_vm, 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 = createJITStubRoutine(
FINALIZE_CODE(
patchBuffer,
("Baseline put_by_id transition stub for %s, return point %p",
toCString(*m_codeBlock).data(), returnAddress.value())),
*m_vm,
m_codeBlock->ownerExecutable(),
willNeedStorageRealloc,
newStructure);
RepatchBuffer repatchBuffer(m_codeBlock);
repatchBuffer.relinkCallerToTrampoline(returnAddress, CodeLocationLabel(stubInfo->stubRoutine->code().code()));
}
void JIT::patchGetByIdSelf(CodeBlock* codeBlock, StructureStubInfo* stubInfo, Structure* structure, PropertyOffset cachedOffset, ReturnAddressPtr returnAddress)
{
RepatchBuffer repatchBuffer(codeBlock);
repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_self_fail));
repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelPtrAtOffset(stubInfo->patch.baseline.u.get.structureToCompare), structure);
repatchBuffer.setLoadInstructionIsActive(stubInfo->hotPathBegin.convertibleLoadAtOffset(stubInfo->patch.baseline.u.get.propertyStorageLoad), isOutOfLineOffset(cachedOffset));
repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelCompactAtOffset(stubInfo->patch.baseline.u.get.displacementLabel1), offsetRelativeToPatchedStorage(cachedOffset) + OBJECT_OFFSETOF(JSValue, u.asBits.payload)); repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelCompactAtOffset(stubInfo->patch.baseline.u.get.displacementLabel2), offsetRelativeToPatchedStorage(cachedOffset) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)); }
void JIT::patchPutByIdReplace(CodeBlock* codeBlock, StructureStubInfo* stubInfo, Structure* structure, PropertyOffset 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));
repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelPtrAtOffset(stubInfo->patch.baseline.u.put.structureToCompare), structure);
repatchBuffer.setLoadInstructionIsActive(stubInfo->hotPathBegin.convertibleLoadAtOffset(stubInfo->patch.baseline.u.put.propertyStorageLoad), isOutOfLineOffset(cachedOffset));
repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabel32AtOffset(stubInfo->patch.baseline.u.put.displacementLabel1), offsetRelativeToPatchedStorage(cachedOffset) + OBJECT_OFFSETOF(JSValue, u.asBits.payload)); repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabel32AtOffset(stubInfo->patch.baseline.u.put.displacementLabel2), offsetRelativeToPatchedStorage(cachedOffset) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)); }
void JIT::privateCompilePatchGetArrayLength(ReturnAddressPtr returnAddress)
{
StructureStubInfo* stubInfo = &m_codeBlock->getStubInfo(returnAddress);
loadPtr(Address(regT0, JSCell::structureOffset()), regT2);
Jump failureCases1 = branchTest32(Zero, regT2, TrustedImm32(IsArray));
Jump failureCases2 = branchTest32(Zero, regT2, TrustedImm32(IndexingShapeMask));
loadPtr(Address(regT0, JSArray::butterflyOffset()), regT2);
load32(Address(regT2, ArrayStorage::lengthOffset()), regT2);
Jump failureCases3 = branch32(Above, regT2, TrustedImm32(INT_MAX));
move(regT2, regT0);
move(TrustedImm32(JSValue::Int32Tag), regT1);
Jump success = jump();
LinkBuffer patchBuffer(*m_vm, this, m_codeBlock);
CodeLocationLabel slowCaseBegin = stubInfo->callReturnLocation.labelAtOffset(-stubInfo->patch.baseline.u.get.coldPathBegin);
patchBuffer.link(failureCases1, slowCaseBegin);
patchBuffer.link(failureCases2, slowCaseBegin);
patchBuffer.link(failureCases3, slowCaseBegin);
patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(stubInfo->patch.baseline.u.get.putResult));
stubInfo->stubRoutine = FINALIZE_CODE_FOR_STUB(
patchBuffer,
("Baseline get_by_id array length stub for %s, return point %p",
toCString(*m_codeBlock).data(), stubInfo->hotPathBegin.labelAtOffset(
stubInfo->patch.baseline.u.get.putResult).executableAddress()));
CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(stubInfo->patch.baseline.u.get.structureCheck);
RepatchBuffer repatchBuffer(m_codeBlock);
repatchBuffer.relink(jumpLocation, CodeLocationLabel(stubInfo->stubRoutine->code().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, PropertyOffset cachedOffset, ReturnAddressPtr returnAddress, CallFrame* callFrame)
{
JSObject* protoObject = asObject(structure->prototypeForLookup(callFrame));
Jump failureCases1 = checkStructure(regT0, structure);
Jump failureCases2 = addStructureTransitionCheck(protoObject, prototypeStructure, stubInfo, regT3);
bool needsStubLink = false;
if (slot.cachedPropertyType() == PropertySlot::Getter) {
needsStubLink = true;
compileGetDirectOffset(protoObject, regT2, 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, regT1, regT0, cachedOffset);
Jump success = jump();
LinkBuffer patchBuffer(*m_vm, this, m_codeBlock);
CodeLocationLabel slowCaseBegin = stubInfo->callReturnLocation.labelAtOffset(-stubInfo->patch.baseline.u.get.coldPathBegin);
patchBuffer.link(failureCases1, slowCaseBegin);
if (failureCases2.isSet())
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 = createJITStubRoutine(
FINALIZE_CODE(
patchBuffer,
("Baseline get_by_id proto stub for %s, return point %p",
toCString(*m_codeBlock).data(), stubInfo->hotPathBegin.labelAtOffset(
stubInfo->patch.baseline.u.get.putResult).executableAddress())),
*m_vm,
m_codeBlock->ownerExecutable(),
needsStubLink);
CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(stubInfo->patch.baseline.u.get.structureCheck);
RepatchBuffer repatchBuffer(m_codeBlock);
repatchBuffer.relink(jumpLocation, CodeLocationLabel(stubInfo->stubRoutine->code().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, PropertyOffset cachedOffset)
{
Jump failureCase = checkStructure(regT0, structure);
bool needsStubLink = false;
bool isDirect = false;
if (slot.cachedPropertyType() == PropertySlot::Getter) {
needsStubLink = true;
compileGetDirectOffset(regT0, regT2, 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, regT1, regT0, cachedOffset);
}
Jump success = jump();
LinkBuffer patchBuffer(*m_vm, 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(JITStubRoutine::asCodePtr(polymorphicStructures->list[currentIndex - 1].stubRoutine));
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));
RefPtr<JITStubRoutine> stubRoutine = createJITStubRoutine(
FINALIZE_CODE(
patchBuffer,
("Baseline get_by_id self list stub for %s, return point %p",
toCString(*m_codeBlock).data(), stubInfo->hotPathBegin.labelAtOffset(
stubInfo->patch.baseline.u.get.putResult).executableAddress())),
*m_vm,
m_codeBlock->ownerExecutable(),
needsStubLink);
polymorphicStructures->list[currentIndex].set(*m_vm, m_codeBlock->ownerExecutable(), stubRoutine, structure, isDirect);
CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(stubInfo->patch.baseline.u.get.structureCheck);
RepatchBuffer repatchBuffer(m_codeBlock);
repatchBuffer.relink(jumpLocation, CodeLocationLabel(stubRoutine->code().code()));
}
void JIT::privateCompileGetByIdProtoList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* prototypeStructures, int currentIndex, Structure* structure, Structure* prototypeStructure, const Identifier& ident, const PropertySlot& slot, PropertyOffset cachedOffset, CallFrame* callFrame)
{
JSObject* protoObject = asObject(structure->prototypeForLookup(callFrame));
Jump failureCases1 = checkStructure(regT0, structure);
Jump failureCases2 = addStructureTransitionCheck(protoObject, prototypeStructure, stubInfo, regT3);
bool needsStubLink = false;
bool isDirect = false;
if (slot.cachedPropertyType() == PropertySlot::Getter) {
needsStubLink = true;
compileGetDirectOffset(protoObject, regT2, 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, regT1, regT0, cachedOffset);
}
Jump success = jump();
LinkBuffer patchBuffer(*m_vm, 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(JITStubRoutine::asCodePtr(prototypeStructures->list[currentIndex - 1].stubRoutine));
patchBuffer.link(failureCases1, lastProtoBegin);
if (failureCases2.isSet())
patchBuffer.link(failureCases2, lastProtoBegin);
patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(stubInfo->patch.baseline.u.get.putResult));
RefPtr<JITStubRoutine> stubRoutine = createJITStubRoutine(
FINALIZE_CODE(
patchBuffer,
("Baseline get_by_id proto list stub for %s, return point %p",
toCString(*m_codeBlock).data(), stubInfo->hotPathBegin.labelAtOffset(
stubInfo->patch.baseline.u.get.putResult).executableAddress())),
*m_vm,
m_codeBlock->ownerExecutable(),
needsStubLink);
prototypeStructures->list[currentIndex].set(callFrame->vm(), m_codeBlock->ownerExecutable(), stubRoutine, structure, prototypeStructure, isDirect);
CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(stubInfo->patch.baseline.u.get.structureCheck);
RepatchBuffer repatchBuffer(m_codeBlock);
repatchBuffer.relink(jumpLocation, CodeLocationLabel(stubRoutine->code().code()));
}
void JIT::privateCompileGetByIdChainList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* prototypeStructures, int currentIndex, Structure* structure, StructureChain* chain, size_t count, const Identifier& ident, const PropertySlot& slot, PropertyOffset cachedOffset, 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, stubInfo);
}
ASSERT(protoObject);
bool needsStubLink = false;
bool isDirect = false;
if (slot.cachedPropertyType() == PropertySlot::Getter) {
needsStubLink = true;
compileGetDirectOffset(protoObject, regT2, 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, regT1, regT0, cachedOffset);
}
Jump success = jump();
LinkBuffer patchBuffer(*m_vm, 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(JITStubRoutine::asCodePtr(prototypeStructures->list[currentIndex - 1].stubRoutine));
patchBuffer.link(bucketsOfFail, lastProtoBegin);
patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(stubInfo->patch.baseline.u.get.putResult));
RefPtr<JITStubRoutine> stubRoutine = createJITStubRoutine(
FINALIZE_CODE(
patchBuffer,
("Baseline get_by_id chain list stub for %s, return point %p",
toCString(*m_codeBlock).data(), stubInfo->hotPathBegin.labelAtOffset(
stubInfo->patch.baseline.u.get.putResult).executableAddress())),
*m_vm,
m_codeBlock->ownerExecutable(),
needsStubLink);
prototypeStructures->list[currentIndex].set(callFrame->vm(), 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().code()));
}
void JIT::privateCompileGetByIdChain(StructureStubInfo* stubInfo, Structure* structure, StructureChain* chain, size_t count, const Identifier& ident, const PropertySlot& slot, PropertyOffset 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, stubInfo);
}
ASSERT(protoObject);
bool needsStubLink = false;
if (slot.cachedPropertyType() == PropertySlot::Getter) {
needsStubLink = true;
compileGetDirectOffset(protoObject, regT2, 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, regT1, regT0, cachedOffset);
Jump success = jump();
LinkBuffer patchBuffer(*m_vm, 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));
RefPtr<JITStubRoutine> stubRoutine = createJITStubRoutine(
FINALIZE_CODE(
patchBuffer,
("Baseline get_by_id chain stub for %s, return point %p",
toCString(*m_codeBlock).data(), stubInfo->hotPathBegin.labelAtOffset(
stubInfo->patch.baseline.u.get.putResult).executableAddress())),
*m_vm,
m_codeBlock->ownerExecutable(),
needsStubLink);
stubInfo->stubRoutine = stubRoutine;
CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(stubInfo->patch.baseline.u.get.structureCheck);
RepatchBuffer repatchBuffer(m_codeBlock);
repatchBuffer.relink(jumpLocation, CodeLocationLabel(stubRoutine->code().code()));
repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_proto_list));
}
void JIT::compileGetDirectOffset(RegisterID base, RegisterID resultTag, RegisterID resultPayload, RegisterID offset, FinalObjectMode finalObjectMode)
{
ASSERT(sizeof(JSValue) == 8);
if (finalObjectMode == MayBeFinal) {
Jump isInline = branch32(LessThan, offset, TrustedImm32(firstOutOfLineOffset));
loadPtr(Address(base, JSObject::butterflyOffset()), base);
neg32(offset);
Jump done = jump();
isInline.link(this);
addPtr(TrustedImmPtr(JSObject::offsetOfInlineStorage() - (firstOutOfLineOffset - 2) * sizeof(EncodedJSValue)), base);
done.link(this);
} else {
#if !ASSERT_DISABLED
Jump isOutOfLine = branch32(GreaterThanOrEqual, offset, TrustedImm32(firstOutOfLineOffset));
breakpoint();
isOutOfLine.link(this);
#endif
loadPtr(Address(base, JSObject::butterflyOffset()), base);
neg32(offset);
}
load32(BaseIndex(base, offset, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.payload) + (firstOutOfLineOffset - 2) * sizeof(EncodedJSValue)), resultPayload);
load32(BaseIndex(base, offset, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.tag) + (firstOutOfLineOffset - 2) * sizeof(EncodedJSValue)), resultTag);
}
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;
emitLoad2(property, regT1, regT0, base, regT3, regT2);
emitJumpSlowCaseIfNotJSCell(property, regT1);
addSlowCase(branchPtr(NotEqual, regT0, payloadFor(expected)));
emitJumpSlowCaseIfNotJSCell(base, regT3);
emitLoadPayload(iter, regT1);
loadPtr(Address(regT2, JSCell::structureOffset()), regT0);
addSlowCase(branchPtr(NotEqual, regT0, 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))));
Jump inlineProperty = branch32(Below, regT3, Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_cachedStructureInlineCapacity)));
add32(TrustedImm32(firstOutOfLineOffset), regT3);
sub32(Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_cachedStructureInlineCapacity)), regT3);
inlineProperty.link(this);
compileGetDirectOffset(regT2, regT1, regT0, regT3);
emitStore(dst, regT1, regT0);
map(m_bytecodeOffset + OPCODE_LENGTH(op_get_by_pname), dst, regT1, 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;
linkSlowCaseIfNotJSCell(iter, property);
linkSlowCase(iter);
linkSlowCaseIfNotJSCell(iter, base);
linkSlowCase(iter);
linkSlowCase(iter);
JITStubCall stubCall(this, cti_op_get_by_val_generic);
stubCall.addArgument(base);
stubCall.addArgument(property);
stubCall.call(dst);
}
void JIT::emit_op_get_scoped_var(Instruction* currentInstruction)
{
int dst = currentInstruction[1].u.operand;
int index = currentInstruction[2].u.operand;
int skip = currentInstruction[3].u.operand;
emitGetFromCallFrameHeaderPtr(JSStack::ScopeChain, regT2);
bool checkTopLevel = m_codeBlock->codeType() == FunctionCode && m_codeBlock->needsFullScopeChain();
ASSERT(skip || !checkTopLevel);
if (checkTopLevel && skip--) {
Jump activationNotCreated;
if (checkTopLevel)
activationNotCreated = branch32(Equal, tagFor(m_codeBlock->activationRegister()), TrustedImm32(JSValue::EmptyValueTag));
loadPtr(Address(regT2, JSScope::offsetOfNext()), regT2);
activationNotCreated.link(this);
}
while (skip--)
loadPtr(Address(regT2, JSScope::offsetOfNext()), regT2);
loadPtr(Address(regT2, JSVariableObject::offsetOfRegisters()), regT2);
emitLoad(index, regT1, regT0, regT2);
emitValueProfilingSite();
emitStore(dst, regT1, regT0);
map(m_bytecodeOffset + OPCODE_LENGTH(op_get_scoped_var), dst, regT1, regT0);
}
void JIT::emit_op_put_scoped_var(Instruction* currentInstruction)
{
int index = currentInstruction[1].u.operand;
int skip = currentInstruction[2].u.operand;
int value = currentInstruction[3].u.operand;
emitLoad(value, regT1, regT0);
emitGetFromCallFrameHeaderPtr(JSStack::ScopeChain, regT2);
bool checkTopLevel = m_codeBlock->codeType() == FunctionCode && m_codeBlock->needsFullScopeChain();
ASSERT(skip || !checkTopLevel);
if (checkTopLevel && skip--) {
Jump activationNotCreated;
if (checkTopLevel)
activationNotCreated = branch32(Equal, tagFor(m_codeBlock->activationRegister()), TrustedImm32(JSValue::EmptyValueTag));
loadPtr(Address(regT2, JSScope::offsetOfNext()), regT2);
activationNotCreated.link(this);
}
while (skip--)
loadPtr(Address(regT2, JSScope::offsetOfNext()), regT2);
loadPtr(Address(regT2, JSVariableObject::offsetOfRegisters()), regT3);
emitStore(index, regT1, regT0, regT3);
emitWriteBarrier(regT2, regT1, regT0, regT1, ShouldFilterImmediates, WriteBarrierForVariableAccess);
}
void JIT::emit_op_init_global_const(Instruction* currentInstruction)
{
WriteBarrier<Unknown>* registerPointer = currentInstruction[1].u.registerPointer;
int value = currentInstruction[2].u.operand;
JSGlobalObject* globalObject = m_codeBlock->globalObject();
emitLoad(value, regT1, regT0);
if (Heap::isWriteBarrierEnabled()) {
move(TrustedImmPtr(globalObject), regT2);
emitWriteBarrier(globalObject, regT1, regT3, ShouldFilterImmediates, WriteBarrierForVariableAccess);
}
store32(regT1, registerPointer->tagPointer());
store32(regT0, registerPointer->payloadPointer());
map(m_bytecodeOffset + OPCODE_LENGTH(op_init_global_const), value, regT1, regT0);
}
void JIT::emit_op_init_global_const_check(Instruction* currentInstruction)
{
WriteBarrier<Unknown>* registerPointer = currentInstruction[1].u.registerPointer;
int value = currentInstruction[2].u.operand;
JSGlobalObject* globalObject = m_codeBlock->globalObject();
emitLoad(value, regT1, regT0);
addSlowCase(branchTest8(NonZero, AbsoluteAddress(currentInstruction[3].u.predicatePointer)));
if (Heap::isWriteBarrierEnabled()) {
move(TrustedImmPtr(globalObject), regT2);
emitWriteBarrier(globalObject, regT1, regT3, ShouldFilterImmediates, WriteBarrierForVariableAccess);
}
store32(regT1, registerPointer->tagPointer());
store32(regT0, registerPointer->payloadPointer());
unmap();
}
void JIT::emitSlow_op_init_global_const_check(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkSlowCase(iter);
JITStubCall stubCall(this, cti_op_init_global_const_check);
stubCall.addArgument(regT1, regT0);
stubCall.addArgument(TrustedImm32(currentInstruction[4].u.operand));
stubCall.call();
}
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*>(unusedPointer));
repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelCompactAtOffset(stubInfo->patch.baseline.u.get.displacementLabel1), 0);
repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelCompactAtOffset(stubInfo->patch.baseline.u.get.displacementLabel2), 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*>(unusedPointer));
repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabel32AtOffset(stubInfo->patch.baseline.u.put.displacementLabel1), 0);
repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabel32AtOffset(stubInfo->patch.baseline.u.put.displacementLabel2), 0);
}
}
#endif // USE(JSVALUE32_64)
#endif // ENABLE(JIT)