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darling-JavaScriptCore/jit/JITPropertyAccess32_64.cpp

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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 "CacheableIdentifierInlines.h"
#include "CodeBlock.h"
#include "DirectArguments.h"
#include "GCAwareJITStubRoutine.h"
#include "InterpreterInlines.h"
#include "JITInlines.h"
#include "JSArray.h"
#include "JSFunction.h"
#include "JSLexicalEnvironment.h"
#include "JSPromise.h"
#include "LinkBuffer.h"
#include "OpcodeInlines.h"
#include "ResultType.h"
#include "SlowPathCall.h"
#include "StructureStubInfo.h"
#include <wtf/StringPrintStream.h>
namespace JSC {
void JIT::emit_op_put_getter_by_id(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutGetterById>();
VirtualRegister base = bytecode.m_base;
int property = bytecode.m_property;
int options = bytecode.m_attributes;
VirtualRegister getter = bytecode.m_accessor;
emitLoadPayload(base, regT1);
emitLoadPayload(getter, regT3);
callOperation(operationPutGetterById, m_codeBlock->globalObject(), regT1, m_codeBlock->identifier(property).impl(), options, regT3);
}
void JIT::emit_op_put_setter_by_id(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutSetterById>();
VirtualRegister base = bytecode.m_base;
int property = bytecode.m_property;
int options = bytecode.m_attributes;
VirtualRegister setter = bytecode.m_accessor;
emitLoadPayload(base, regT1);
emitLoadPayload(setter, regT3);
callOperation(operationPutSetterById, m_codeBlock->globalObject(), regT1, m_codeBlock->identifier(property).impl(), options, regT3);
}
void JIT::emit_op_put_getter_setter_by_id(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutGetterSetterById>();
VirtualRegister base = bytecode.m_base;
int property = bytecode.m_property;
int attributes = bytecode.m_attributes;
VirtualRegister getter = bytecode.m_getter;
VirtualRegister setter = bytecode.m_setter;
emitLoadPayload(base, regT1);
emitLoadPayload(getter, regT3);
emitLoadPayload(setter, regT4);
callOperation(operationPutGetterSetter, m_codeBlock->globalObject(), regT1, m_codeBlock->identifier(property).impl(), attributes, regT3, regT4);
}
void JIT::emit_op_put_getter_by_val(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutGetterByVal>();
VirtualRegister base = bytecode.m_base;
VirtualRegister property = bytecode.m_property;
int32_t attributes = bytecode.m_attributes;
VirtualRegister getter = bytecode.m_accessor;
emitLoadPayload(base, regT2);
emitLoad(property, regT1, regT0);
emitLoadPayload(getter, regT3);
callOperation(operationPutGetterByVal, m_codeBlock->globalObject(), regT2, JSValueRegs(regT1, regT0), attributes, regT3);
}
void JIT::emit_op_put_setter_by_val(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutSetterByVal>();
VirtualRegister base = bytecode.m_base;
VirtualRegister property = bytecode.m_property;
int32_t attributes = bytecode.m_attributes;
VirtualRegister setter = bytecode.m_accessor;
emitLoadPayload(base, regT2);
emitLoad(property, regT1, regT0);
emitLoadPayload(setter, regT3);
callOperation(operationPutSetterByVal, m_codeBlock->globalObject(), regT2, JSValueRegs(regT1, regT0), attributes, regT3);
}
void JIT::emit_op_del_by_id(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpDelById>();
VirtualRegister dst = bytecode.m_dst;
VirtualRegister base = bytecode.m_base;
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
JSValueRegs baseRegs = JSValueRegs(regT3, regT2);
JSValueRegs resultRegs = JSValueRegs(regT1, regT0);
emitLoad(base, baseRegs.tagGPR(), baseRegs.payloadGPR());
emitJumpSlowCaseIfNotJSCell(base, baseRegs.tagGPR());
JITDelByIdGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSet::stubUnavailableRegisters(),
CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident),
baseRegs, resultRegs, regT4);
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_delByIds.append(gen);
boxBoolean(regT0, resultRegs);
emitPutVirtualRegister(dst, resultRegs);
// IC can write new Structure without write-barrier if a base is cell.
// We should emit write-barrier at the end of sequence since write-barrier clobbers registers.
// FIXME: Use UnconditionalWriteBarrier in Baseline effectively to reduce code size.
// https://bugs.webkit.org/show_bug.cgi?id=209395
emitWriteBarrier(base, ShouldFilterBase);
}
void JIT::emit_op_del_by_val(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpDelByVal>();
VirtualRegister dst = bytecode.m_dst;
VirtualRegister base = bytecode.m_base;
VirtualRegister property = bytecode.m_property;
JSValueRegs baseRegs = JSValueRegs(regT3, regT2);
JSValueRegs propertyRegs = JSValueRegs(regT1, regT0);
JSValueRegs resultRegs = JSValueRegs(regT1, regT0);
emitLoad2(base, baseRegs.tagGPR(), baseRegs.payloadGPR(), property, propertyRegs.tagGPR(), propertyRegs.payloadGPR());
emitJumpSlowCaseIfNotJSCell(base, baseRegs.tagGPR());
emitJumpSlowCaseIfNotJSCell(property, propertyRegs.tagGPR());
JITDelByValGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSet::stubUnavailableRegisters(),
baseRegs, propertyRegs, resultRegs, regT4);
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_delByVals.append(gen);
boxBoolean(regT0, resultRegs);
emitPutVirtualRegister(dst, resultRegs);
// We should emit write-barrier at the end of sequence since write-barrier clobbers registers.
// IC can write new Structure without write-barrier if a base is cell.
// FIXME: Use UnconditionalWriteBarrier in Baseline effectively to reduce code size.
// https://bugs.webkit.org/show_bug.cgi?id=209395
emitWriteBarrier(base, ShouldFilterBase);
}
void JIT::emitSlow_op_del_by_val(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
auto bytecode = currentInstruction->as<OpDelByVal>();
VirtualRegister dst = bytecode.m_dst;
VirtualRegister base = bytecode.m_base;
VirtualRegister property = bytecode.m_property;
JITDelByValGenerator& gen = m_delByVals[m_delByValIndex++];
Label coldPathBegin = label();
JSValueRegs baseRegs = JSValueRegs(regT3, regT2);
JSValueRegs propertyRegs = JSValueRegs(regT1, regT0);
JSValueRegs resultRegs = JSValueRegs(regT1, regT0);
emitLoad2(base, baseRegs.tagGPR(), baseRegs.payloadGPR(), property, propertyRegs.tagGPR(), propertyRegs.payloadGPR());
Call call = callOperation(operationDeleteByValOptimize, TrustedImmPtr(m_codeBlock->globalObject()), gen.stubInfo(), JSValueRegs(baseRegs.tagGPR(), baseRegs.payloadGPR()), JSValueRegs(propertyRegs.tagGPR(), propertyRegs.payloadGPR()), TrustedImm32(bytecode.m_ecmaMode.value()));
gen.reportSlowPathCall(coldPathBegin, call);
boxBoolean(regT0, resultRegs);
emitPutVirtualRegister(dst, resultRegs);
}
void JIT::emitSlow_op_del_by_id(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
auto bytecode = currentInstruction->as<OpDelById>();
VirtualRegister dst = bytecode.m_dst;
VirtualRegister base = bytecode.m_base;
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
JSValueRegs baseRegs = JSValueRegs(regT1, regT0);
JSValueRegs resultRegs = JSValueRegs(regT1, regT0);
JITDelByIdGenerator& gen = m_delByIds[m_delByIdIndex++];
Label coldPathBegin = label();
emitLoad(base, baseRegs.tagGPR(), baseRegs.payloadGPR());
Call call = callOperation(operationDeleteByIdOptimize, TrustedImmPtr(m_codeBlock->globalObject()), gen.stubInfo(), baseRegs, CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident).rawBits(), TrustedImm32(bytecode.m_ecmaMode.value()));
gen.reportSlowPathCall(coldPathBegin, call);
boxBoolean(regT0, resultRegs);
emitPutVirtualRegister(dst, resultRegs);
}
void JIT::emit_op_get_by_val(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpGetByVal>();
auto& metadata = bytecode.metadata(m_codeBlock);
VirtualRegister dst = bytecode.m_dst;
VirtualRegister base = bytecode.m_base;
VirtualRegister property = bytecode.m_property;
ArrayProfile* profile = &metadata.m_arrayProfile;
emitLoad2(base, regT1, regT0, property, regT3, regT2);
if (metadata.m_seenIdentifiers.count() > Options::getByValICMaxNumberOfIdentifiers()) {
auto notCell = branchIfNotCell(regT1);
emitArrayProfilingSiteWithCell(regT0, regT4, profile);
notCell.link(this);
callOperationWithProfile(bytecode.metadata(m_codeBlock), operationGetByVal, dst, TrustedImmPtr(m_codeBlock->globalObject()), JSValueRegs(regT1, regT0), JSValueRegs(regT3, regT2));
} else {
emitJumpSlowCaseIfNotJSCell(base, regT1);
emitArrayProfilingSiteWithCell(regT0, regT4, profile);
JSValueRegs resultRegs = JSValueRegs(regT1, regT0);
JITGetByValGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), AccessType::GetByVal, RegisterSet::stubUnavailableRegisters(),
JSValueRegs::payloadOnly(regT0), JSValueRegs(regT3, regT2), resultRegs);
if (isOperandConstantInt(property))
gen.stubInfo()->propertyIsInt32 = true;
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_getByVals.append(gen);
emitValueProfilingSite(bytecode.metadata(m_codeBlock), resultRegs);
emitStore(dst, regT1, regT0);
}
}
void JIT::emitSlow_op_get_by_val(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
if (hasAnySlowCases(iter)) {
auto bytecode = currentInstruction->as<OpGetByVal>();
VirtualRegister dst = bytecode.m_dst;
auto& metadata = bytecode.metadata(m_codeBlock);
ArrayProfile* profile = &metadata.m_arrayProfile;
JITGetByValGenerator& gen = m_getByVals[m_getByValIndex];
++m_getByValIndex;
linkAllSlowCases(iter);
Label coldPathBegin = label();
Call call = callOperationWithProfile(bytecode.metadata(m_codeBlock), operationGetByValOptimize, dst, TrustedImmPtr(m_codeBlock->globalObject()), gen.stubInfo(), profile, JSValueRegs(regT1, regT0), JSValueRegs(regT3, regT2));
gen.reportSlowPathCall(coldPathBegin, call);
}
}
void JIT::emit_op_get_private_name(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpGetPrivateName>();
VirtualRegister dst = bytecode.m_dst;
VirtualRegister base = bytecode.m_base;
VirtualRegister property = bytecode.m_property;
auto baseGPR = JSValueRegs::payloadOnly(regT0);
auto propertyGPR = JSValueRegs(regT3, regT2);
emitLoad2(base, regT1, regT0, property, regT3, regT2);
emitJumpSlowCaseIfNotJSCell(base, regT1);
JSValueRegs resultRegs = JSValueRegs(regT1, regT0);
JITGetByValGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), AccessType::GetPrivateName,
RegisterSet::stubUnavailableRegisters(), baseGPR, propertyGPR, resultRegs);
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_getByVals.append(gen);
emitValueProfilingSite(bytecode.metadata(m_codeBlock), resultRegs);
emitStore(dst, resultRegs.tagGPR(), resultRegs.payloadGPR());
}
void JIT::emitSlow_op_get_private_name(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
ASSERT(hasAnySlowCases(iter));
auto bytecode = currentInstruction->as<OpGetPrivateName>();
VirtualRegister dst = bytecode.m_dst;
linkAllSlowCases(iter);
JITGetByValGenerator& gen = m_getByVals[m_getByValIndex];
++m_getByValIndex;
Label coldPathBegin = label();
auto baseGPR = JSValueRegs(regT1, regT0);
auto propertyGPR = JSValueRegs(regT3, regT2);
Call call = callOperationWithProfile(bytecode.metadata(m_codeBlock), operationGetPrivateNameOptimize, dst, TrustedImmPtr(m_codeBlock->globalObject()), gen.stubInfo(), baseGPR, propertyGPR);
gen.reportSlowPathCall(coldPathBegin, call);
}
void JIT::emit_op_put_private_name(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutPrivateName>();
VirtualRegister base = bytecode.m_base;
VirtualRegister property = bytecode.m_property;
ByValInfo* byValInfo = m_codeBlock->addByValInfo(m_bytecodeIndex);
emitLoad2(base, regT1, regT0, property, regT3, regT2);
emitJumpSlowCaseIfNotJSCell(base, regT1);
PatchableJump fastPathJmp = patchableJump();
addSlowCase(fastPathJmp);
Label done = label();
m_byValCompilationInfo.append(ByValCompilationInfo(byValInfo, m_bytecodeIndex, fastPathJmp, done, done));
}
void JIT::emitSlow_op_put_private_name(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
auto bytecode = currentInstruction->as<OpPutPrivateName>();
VirtualRegister base = bytecode.m_base;
VirtualRegister property = bytecode.m_property;
VirtualRegister value = bytecode.m_value;
ByValInfo* byValInfo = m_byValCompilationInfo[m_byValInstructionIndex].byValInfo;
PrivateFieldPutKind putKind = bytecode.m_putKind;
linkAllSlowCases(iter);
Label slowPath = label();
JSValueRegs baseRegs(regT1, regT0);
JSValueRegs propertyRegs(regT3, regT2);
JSValueRegs valueRegs(regT5, regT4);
emitLoad(base, baseRegs.tagGPR(), baseRegs.payloadGPR());
emitLoad(property, propertyRegs.tagGPR(), propertyRegs.payloadGPR());
emitLoad(value, valueRegs.tagGPR(), valueRegs.payloadGPR());
Call call = callOperation(operationPutPrivateNameOptimize, TrustedImmPtr(m_codeBlock->globalObject()), baseRegs, propertyRegs, valueRegs, byValInfo, TrustedImm32(putKind.value()));
m_byValCompilationInfo[m_byValInstructionIndex].slowPathTarget = slowPath;
m_byValCompilationInfo[m_byValInstructionIndex].returnAddress = call;
m_byValInstructionIndex++;
}
void JIT::emit_op_put_by_val_direct(const Instruction* currentInstruction)
{
emit_op_put_by_val<OpPutByValDirect>(currentInstruction);
}
template<typename Op>
void JIT::emit_op_put_by_val(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<Op>();
auto& metadata = bytecode.metadata(m_codeBlock);
VirtualRegister base = bytecode.m_base;
VirtualRegister property = bytecode.m_property;
ArrayProfile* profile = &metadata.m_arrayProfile;
ByValInfo* byValInfo = m_codeBlock->addByValInfo(m_bytecodeIndex);
emitLoad2(base, regT1, regT0, property, regT3, regT2);
emitJumpSlowCaseIfNotJSCell(base, regT1);
PatchableJump notIndex = patchableBranch32(NotEqual, regT3, TrustedImm32(JSValue::Int32Tag));
addSlowCase(notIndex);
emitArrayProfilingSiteWithCell(regT0, regT1, profile);
PatchableJump badType;
JumpList slowCases;
// FIXME: Maybe we should do this inline?
addSlowCase(branchTest32(NonZero, regT1, TrustedImm32(CopyOnWrite)));
and32(TrustedImm32(IndexingShapeMask), regT1);
JITArrayMode mode = chooseArrayMode(profile);
switch (mode) {
case JITInt32:
slowCases = emitInt32PutByVal(bytecode, badType);
break;
case JITDouble:
slowCases = emitDoublePutByVal(bytecode, badType);
break;
case JITContiguous:
slowCases = emitContiguousPutByVal(bytecode, badType);
break;
case JITArrayStorage:
slowCases = emitArrayStoragePutByVal(bytecode, badType);
break;
default:
CRASH();
break;
}
addSlowCase(badType);
addSlowCase(slowCases);
Label done = label();
m_byValCompilationInfo.append(ByValCompilationInfo(byValInfo, m_bytecodeIndex, notIndex, badType, mode, profile, done, done));
}
template <typename Op>
JIT::JumpList JIT::emitGenericContiguousPutByVal(Op bytecode, PatchableJump& badType, IndexingType indexingShape)
{
auto& metadata = bytecode.metadata(m_codeBlock);
VirtualRegister base = bytecode.m_base;
VirtualRegister value = bytecode.m_value;
ArrayProfile* profile = &metadata.m_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(branchIfNotInt32(regT1));
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 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)));
emitLoad(base, regT2, regT3);
emitWriteBarrier(base, value, ShouldFilterValue);
break;
case DoubleShape: {
Jump notInt = branchIfNotInt32(regT1);
convertInt32ToDouble(regT0, fpRegT0);
Jump ready = jump();
notInt.link(this);
moveIntsToDouble(regT0, regT1, fpRegT0, fpRegT1);
slowCases.append(branchIfNaN(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);
return slowCases;
}
template <typename Op>
JIT::JumpList JIT::emitArrayStoragePutByVal(Op bytecode, PatchableJump& badType)
{
auto& metadata = bytecode.metadata(m_codeBlock);
VirtualRegister base = bytecode.m_base;
VirtualRegister value = bytecode.m_value;
ArrayProfile* profile = &metadata.m_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, ArrayStorage::vectorOffset() + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), TrustedImm32(JSValue::EmptyValueTag));
Label storeResult(this);
emitLoad(value, regT1, regT0);
store32(regT0, BaseIndex(regT3, regT2, TimesEight, ArrayStorage::vectorOffset() + OBJECT_OFFSETOF(JSValue, u.asBits.payload))); // payload
store32(regT1, BaseIndex(regT3, regT2, TimesEight, ArrayStorage::vectorOffset() + OBJECT_OFFSETOF(JSValue, u.asBits.tag))); // 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(base, value, ShouldFilterValue);
return slowCases;
}
void JIT::emitSlow_op_put_by_val(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
bool isDirect = currentInstruction->opcodeID() == op_put_by_val_direct;
VirtualRegister base;
VirtualRegister property;
VirtualRegister value;
ECMAMode ecmaMode = ECMAMode::strict();
auto load = [&](auto bytecode) {
base = bytecode.m_base;
property = bytecode.m_property;
value = bytecode.m_value;
ecmaMode = JIT::ecmaMode(bytecode);
};
if (isDirect)
load(currentInstruction->as<OpPutByValDirect>());
else
load(currentInstruction->as<OpPutByVal>());
ByValInfo* byValInfo = m_byValCompilationInfo[m_byValInstructionIndex].byValInfo;
linkAllSlowCases(iter);
Label slowPath = label();
// The register selection below is chosen to reduce register swapping on ARM.
// Swapping shouldn't happen on other platforms.
emitLoad(base, regT2, regT1);
emitLoad(property, regT3, regT0);
emitLoad(value, regT5, regT4);
Call call = callOperation(isDirect ? operationDirectPutByValOptimize : operationPutByValOptimize, m_codeBlock->globalObject(), JSValueRegs(regT2, regT1), JSValueRegs(regT3, regT0), JSValueRegs(regT5, regT4), byValInfo, TrustedImm32(ecmaMode.value()));
m_byValCompilationInfo[m_byValInstructionIndex].slowPathTarget = slowPath;
m_byValCompilationInfo[m_byValInstructionIndex].returnAddress = call;
m_byValInstructionIndex++;
}
void JIT::emit_op_try_get_by_id(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpTryGetById>();
VirtualRegister dst = bytecode.m_dst;
VirtualRegister base = bytecode.m_base;
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
emitLoad(base, regT1, regT0);
emitJumpSlowCaseIfNotJSCell(base, regT1);
JSValueRegs resultRegs = JSValueRegs(regT1, regT0);
JITGetByIdGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSet::stubUnavailableRegisters(),
CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident), JSValueRegs::payloadOnly(regT0), resultRegs, AccessType::TryGetById);
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_getByIds.append(gen);
emitValueProfilingSite(bytecode.metadata(m_codeBlock), resultRegs);
emitStore(dst, resultRegs.tagGPR(), resultRegs.payloadGPR());
}
void JIT::emitSlow_op_try_get_by_id(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
auto bytecode = currentInstruction->as<OpTryGetById>();
VirtualRegister resultVReg = bytecode.m_dst;
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
JITGetByIdGenerator& gen = m_getByIds[m_getByIdIndex++];
Label coldPathBegin = label();
Call call = callOperation(operationTryGetByIdOptimize, resultVReg, m_codeBlock->globalObject(), gen.stubInfo(), JSValueRegs(regT1, regT0), CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident).rawBits());
gen.reportSlowPathCall(coldPathBegin, call);
}
void JIT::emit_op_get_by_id_direct(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpGetByIdDirect>();
VirtualRegister dst = bytecode.m_dst;
VirtualRegister base = bytecode.m_base;
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
emitLoad(base, regT1, regT0);
emitJumpSlowCaseIfNotJSCell(base, regT1);
JSValueRegs resultRegs = JSValueRegs(regT1, regT0);
JITGetByIdGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSet::stubUnavailableRegisters(),
CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident), JSValueRegs::payloadOnly(regT0), resultRegs, AccessType::GetByIdDirect);
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_getByIds.append(gen);
emitValueProfilingSite(bytecode.metadata(m_codeBlock), resultRegs);
emitStore(dst, resultRegs.tagGPR(), resultRegs.payloadGPR());
}
void JIT::emitSlow_op_get_by_id_direct(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
auto bytecode = currentInstruction->as<OpGetByIdDirect>();
VirtualRegister resultVReg = bytecode.m_dst;
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
JITGetByIdGenerator& gen = m_getByIds[m_getByIdIndex++];
Label coldPathBegin = label();
Call call = callOperationWithProfile(bytecode.metadata(m_codeBlock), operationGetByIdDirectOptimize, resultVReg, m_codeBlock->globalObject(), gen.stubInfo(), JSValueRegs(regT1, regT0), CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident).rawBits());
gen.reportSlowPathCall(coldPathBegin, call);
}
void JIT::emit_op_get_by_id(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpGetById>();
auto& metadata = bytecode.metadata(m_codeBlock);
VirtualRegister dst = bytecode.m_dst;
VirtualRegister base = bytecode.m_base;
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
emitLoad(base, regT1, regT0);
emitJumpSlowCaseIfNotJSCell(base, regT1);
if (*ident == m_vm->propertyNames->length && shouldEmitProfiling()) {
Jump notArrayLengthMode = branch8(NotEqual, AbsoluteAddress(&metadata.m_modeMetadata.mode), TrustedImm32(static_cast<uint8_t>(GetByIdMode::ArrayLength)));
emitArrayProfilingSiteWithCell(regT0, regT2, &metadata.m_modeMetadata.arrayLengthMode.arrayProfile);
notArrayLengthMode.link(this);
}
JSValueRegs resultRegs = JSValueRegs(regT1, regT0);
JITGetByIdGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSet::stubUnavailableRegisters(),
CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident), JSValueRegs::payloadOnly(regT0), resultRegs, AccessType::GetById);
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_getByIds.append(gen);
emitValueProfilingSite(bytecode.metadata(m_codeBlock), resultRegs);
emitStore(dst, resultRegs.tagGPR(), resultRegs.payloadGPR());
}
void JIT::emitSlow_op_get_by_id(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
auto bytecode = currentInstruction->as<OpGetById>();
VirtualRegister resultVReg = bytecode.m_dst;
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
JITGetByIdGenerator& gen = m_getByIds[m_getByIdIndex++];
Label coldPathBegin = label();
Call call = callOperationWithProfile(bytecode.metadata(m_codeBlock), operationGetByIdOptimize, resultVReg, m_codeBlock->globalObject(), gen.stubInfo(), JSValueRegs(regT1, regT0), CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident).rawBits());
gen.reportSlowPathCall(coldPathBegin, call);
}
void JIT::emit_op_get_by_id_with_this(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpGetByIdWithThis>();
VirtualRegister dst = bytecode.m_dst;
VirtualRegister base = bytecode.m_base;
VirtualRegister thisVReg = bytecode.m_thisValue;
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
emitLoad(base, regT1, regT0);
emitLoad(thisVReg, regT4, regT3);
emitJumpSlowCaseIfNotJSCell(base, regT1);
emitJumpSlowCaseIfNotJSCell(thisVReg, regT4);
JSValueRegs resultRegs = JSValueRegs(regT1, regT0);
JITGetByIdWithThisGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSet::stubUnavailableRegisters(),
CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident), resultRegs, JSValueRegs::payloadOnly(regT0), JSValueRegs(regT4, regT3));
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_getByIdsWithThis.append(gen);
emitValueProfilingSite(bytecode.metadata(m_codeBlock), resultRegs);
emitStore(dst, resultRegs.tagGPR(), resultRegs.payloadGPR());
}
void JIT::emitSlow_op_get_by_id_with_this(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
auto bytecode = currentInstruction->as<OpGetByIdWithThis>();
VirtualRegister resultVReg = bytecode.m_dst;
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
JITGetByIdWithThisGenerator& gen = m_getByIdsWithThis[m_getByIdWithThisIndex++];
Label coldPathBegin = label();
Call call = callOperationWithProfile(bytecode.metadata(m_codeBlock), operationGetByIdWithThisOptimize, resultVReg, m_codeBlock->globalObject(), gen.stubInfo(), JSValueRegs(regT1, regT0), JSValueRegs(regT4, regT3), CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident).rawBits());
gen.reportSlowPathCall(coldPathBegin, call);
}
void JIT::emit_op_put_by_id(const Instruction* currentInstruction)
{
// In order to be able to patch both the Structure, and the object offset, we store one pointer,
// to just after the arguments have been loaded into registers 'hotPathBegin', and we generate code
// such that the Structure & offset are always at the same distance from this.
auto bytecode = currentInstruction->as<OpPutById>();
VirtualRegister base = bytecode.m_base;
VirtualRegister value = bytecode.m_value;
bool direct = bytecode.m_flags.isDirect();
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
emitLoad2(base, regT1, regT0, value, regT3, regT2);
emitJumpSlowCaseIfNotJSCell(base, regT1);
JITPutByIdGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSet::stubUnavailableRegisters(),
CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident),
JSValueRegs::payloadOnly(regT0), JSValueRegs(regT3, regT2),
regT1, bytecode.m_flags.ecmaMode(), direct ? PutKind::Direct : PutKind::NotDirect);
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_putByIds.append(gen);
// IC can write new Structure without write-barrier if a base is cell.
// FIXME: Use UnconditionalWriteBarrier in Baseline effectively to reduce code size.
// https://bugs.webkit.org/show_bug.cgi?id=209395
emitWriteBarrier(base, ShouldFilterBase);
}
void JIT::emitSlow_op_put_by_id(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
auto bytecode = currentInstruction->as<OpPutById>();
VirtualRegister base = bytecode.m_base;
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
Label coldPathBegin(this);
// JITPutByIdGenerator only preserve the value and the base's payload, we have to reload the tag.
emitLoadTag(base, regT1);
JITPutByIdGenerator& gen = m_putByIds[m_putByIdIndex++];
Call call = callOperation(
gen.slowPathFunction(), m_codeBlock->globalObject(), gen.stubInfo(), JSValueRegs(regT3, regT2), JSValueRegs(regT1, regT0), CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident).rawBits());
gen.reportSlowPathCall(coldPathBegin, call);
}
void JIT::emit_op_in_by_id(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpInById>();
VirtualRegister dst = bytecode.m_dst;
VirtualRegister base = bytecode.m_base;
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
emitLoad(base, regT1, regT0);
emitJumpSlowCaseIfNotJSCell(base, regT1);
JITInByIdGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSet::stubUnavailableRegisters(),
CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident), JSValueRegs::payloadOnly(regT0), JSValueRegs(regT1, regT0));
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_inByIds.append(gen);
emitStore(dst, regT1, regT0);
}
void JIT::emitSlow_op_in_by_id(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
auto bytecode = currentInstruction->as<OpInById>();
VirtualRegister resultVReg = bytecode.m_dst;
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
JITInByIdGenerator& gen = m_inByIds[m_inByIdIndex++];
Label coldPathBegin = label();
Call call = callOperation(operationInByIdOptimize, resultVReg, m_codeBlock->globalObject(), gen.stubInfo(), JSValueRegs(regT1, regT0), CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident).rawBits());
gen.reportSlowPathCall(coldPathBegin, call);
}
void JIT::emitVarInjectionCheck(bool needsVarInjectionChecks)
{
if (!needsVarInjectionChecks)
return;
addSlowCase(branch8(Equal, AbsoluteAddress(m_codeBlock->globalObject()->varInjectionWatchpoint()->addressOfState()), TrustedImm32(IsInvalidated)));
}
void JIT::emitResolveClosure(VirtualRegister dst, VirtualRegister scope, bool needsVarInjectionChecks, unsigned depth)
{
emitVarInjectionCheck(needsVarInjectionChecks);
move(TrustedImm32(JSValue::CellTag), regT1);
emitLoadPayload(scope, regT0);
for (unsigned i = 0; i < depth; ++i)
loadPtr(Address(regT0, JSScope::offsetOfNext()), regT0);
emitStore(dst, regT1, regT0);
}
void JIT::emit_op_resolve_scope(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpResolveScope>();
auto& metadata = bytecode.metadata(m_codeBlock);
VirtualRegister dst = bytecode.m_dst;
VirtualRegister scope = bytecode.m_scope;
ResolveType resolveType = metadata.m_resolveType;
unsigned depth = metadata.m_localScopeDepth;
auto emitCode = [&] (ResolveType resolveType) {
switch (resolveType) {
case GlobalProperty:
case GlobalPropertyWithVarInjectionChecks: {
JSScope* constantScope = JSScope::constantScopeForCodeBlock(resolveType, m_codeBlock);
RELEASE_ASSERT(constantScope);
emitVarInjectionCheck(needsVarInjectionChecks(resolveType));
load32(&metadata.m_globalLexicalBindingEpoch, regT1);
addSlowCase(branch32(NotEqual, AbsoluteAddress(m_codeBlock->globalObject()->addressOfGlobalLexicalBindingEpoch()), regT1));
move(TrustedImm32(JSValue::CellTag), regT1);
move(TrustedImmPtr(constantScope), regT0);
emitStore(dst, regT1, regT0);
break;
}
case GlobalVar:
case GlobalVarWithVarInjectionChecks:
case GlobalLexicalVar:
case GlobalLexicalVarWithVarInjectionChecks: {
JSScope* constantScope = JSScope::constantScopeForCodeBlock(resolveType, m_codeBlock);
RELEASE_ASSERT(constantScope);
emitVarInjectionCheck(needsVarInjectionChecks(resolveType));
move(TrustedImm32(JSValue::CellTag), regT1);
move(TrustedImmPtr(constantScope), regT0);
emitStore(dst, regT1, regT0);
break;
}
case ClosureVar:
case ClosureVarWithVarInjectionChecks:
emitResolveClosure(dst, scope, needsVarInjectionChecks(resolveType), depth);
break;
case ModuleVar:
move(TrustedImm32(JSValue::CellTag), regT1);
move(TrustedImmPtr(metadata.m_lexicalEnvironment.get()), regT0);
emitStore(dst, regT1, regT0);
break;
case Dynamic:
addSlowCase(jump());
break;
case LocalClosureVar:
case UnresolvedProperty:
case UnresolvedPropertyWithVarInjectionChecks:
RELEASE_ASSERT_NOT_REACHED();
}
};
switch (resolveType) {
case GlobalProperty:
case GlobalPropertyWithVarInjectionChecks: {
JumpList skipToEnd;
load32(&metadata.m_resolveType, regT0);
Jump notGlobalProperty = branch32(NotEqual, regT0, TrustedImm32(resolveType));
emitCode(resolveType);
skipToEnd.append(jump());
notGlobalProperty.link(this);
emitCode(needsVarInjectionChecks(resolveType) ? GlobalLexicalVarWithVarInjectionChecks : GlobalLexicalVar);
skipToEnd.link(this);
break;
}
case UnresolvedProperty:
case UnresolvedPropertyWithVarInjectionChecks: {
JumpList skipToEnd;
load32(&metadata.m_resolveType, regT0);
Jump notGlobalProperty = branch32(NotEqual, regT0, TrustedImm32(GlobalProperty));
emitCode(GlobalProperty);
skipToEnd.append(jump());
notGlobalProperty.link(this);
Jump notGlobalPropertyWithVarInjections = branch32(NotEqual, regT0, TrustedImm32(GlobalPropertyWithVarInjectionChecks));
emitCode(GlobalPropertyWithVarInjectionChecks);
skipToEnd.append(jump());
notGlobalPropertyWithVarInjections.link(this);
Jump notGlobalLexicalVar = branch32(NotEqual, regT0, TrustedImm32(GlobalLexicalVar));
emitCode(GlobalLexicalVar);
skipToEnd.append(jump());
notGlobalLexicalVar.link(this);
Jump notGlobalLexicalVarWithVarInjections = branch32(NotEqual, regT0, TrustedImm32(GlobalLexicalVarWithVarInjectionChecks));
emitCode(GlobalLexicalVarWithVarInjectionChecks);
skipToEnd.append(jump());
notGlobalLexicalVarWithVarInjections.link(this);
addSlowCase(jump());
skipToEnd.link(this);
break;
}
default:
emitCode(resolveType);
break;
}
}
void JIT::emitLoadWithStructureCheck(VirtualRegister scope, Structure** structureSlot)
{
emitLoad(scope, regT1, regT0);
loadPtr(structureSlot, regT2);
addSlowCase(branchPtr(NotEqual, Address(regT0, JSCell::structureIDOffset()), regT2));
}
void JIT::emitGetVarFromPointer(JSValue* operand, GPRReg tag, GPRReg payload)
{
uintptr_t rawAddress = bitwise_cast<uintptr_t>(operand);
load32(bitwise_cast<void*>(rawAddress + TagOffset), tag);
load32(bitwise_cast<void*>(rawAddress + PayloadOffset), payload);
}
void JIT::emitGetVarFromIndirectPointer(JSValue** operand, GPRReg tag, GPRReg payload)
{
loadPtr(operand, payload);
load32(Address(payload, TagOffset), tag);
load32(Address(payload, PayloadOffset), payload);
}
void JIT::emitGetClosureVar(VirtualRegister scope, uintptr_t operand)
{
emitLoad(scope, regT1, regT0);
load32(Address(regT0, JSLexicalEnvironment::offsetOfVariables() + operand * sizeof(Register) + TagOffset), regT1);
load32(Address(regT0, JSLexicalEnvironment::offsetOfVariables() + operand * sizeof(Register) + PayloadOffset), regT0);
}
void JIT::emit_op_get_from_scope(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpGetFromScope>();
auto& metadata = bytecode.metadata(m_codeBlock);
VirtualRegister dst = bytecode.m_dst;
VirtualRegister scope = bytecode.m_scope;
ResolveType resolveType = metadata.m_getPutInfo.resolveType();
Structure** structureSlot = metadata.m_structure.slot();
uintptr_t* operandSlot = reinterpret_cast<uintptr_t*>(&metadata.m_operand);
auto emitCode = [&] (ResolveType resolveType, bool indirectLoadForOperand) {
switch (resolveType) {
case GlobalProperty:
case GlobalPropertyWithVarInjectionChecks: {
emitLoadWithStructureCheck(scope, structureSlot); // Structure check covers var injection.
GPRReg base = regT2;
GPRReg resultTag = regT1;
GPRReg resultPayload = regT0;
GPRReg offset = regT3;
move(regT0, base);
load32(operandSlot, offset);
if (ASSERT_ENABLED) {
Jump isOutOfLine = branch32(GreaterThanOrEqual, offset, TrustedImm32(firstOutOfLineOffset));
abortWithReason(JITOffsetIsNotOutOfLine);
isOutOfLine.link(this);
}
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);
break;
}
case GlobalVar:
case GlobalVarWithVarInjectionChecks:
case GlobalLexicalVar:
case GlobalLexicalVarWithVarInjectionChecks:
emitVarInjectionCheck(needsVarInjectionChecks(resolveType));
if (indirectLoadForOperand)
emitGetVarFromIndirectPointer(bitwise_cast<JSValue**>(operandSlot), regT1, regT0);
else
emitGetVarFromPointer(bitwise_cast<JSValue*>(*operandSlot), regT1, regT0);
if (resolveType == GlobalLexicalVar || resolveType == GlobalLexicalVarWithVarInjectionChecks) // TDZ check.
addSlowCase(branchIfEmpty(regT1));
break;
case ClosureVar:
case ClosureVarWithVarInjectionChecks:
emitVarInjectionCheck(needsVarInjectionChecks(resolveType));
emitGetClosureVar(scope, *operandSlot);
break;
case Dynamic:
addSlowCase(jump());
break;
case ModuleVar:
case LocalClosureVar:
case UnresolvedProperty:
case UnresolvedPropertyWithVarInjectionChecks:
RELEASE_ASSERT_NOT_REACHED();
}
};
switch (resolveType) {
case GlobalProperty:
case GlobalPropertyWithVarInjectionChecks: {
JumpList skipToEnd;
load32(&metadata.m_getPutInfo, regT0);
and32(TrustedImm32(GetPutInfo::typeBits), regT0); // Load ResolveType into T0
Jump isNotGlobalProperty = branch32(NotEqual, regT0, TrustedImm32(resolveType));
emitCode(resolveType, false);
skipToEnd.append(jump());
isNotGlobalProperty.link(this);
emitCode(needsVarInjectionChecks(resolveType) ? GlobalLexicalVarWithVarInjectionChecks : GlobalLexicalVar, true);
skipToEnd.link(this);
break;
}
case UnresolvedProperty:
case UnresolvedPropertyWithVarInjectionChecks: {
JumpList skipToEnd;
load32(&metadata.m_getPutInfo, regT0);
and32(TrustedImm32(GetPutInfo::typeBits), regT0); // Load ResolveType into T0
Jump isGlobalProperty = branch32(Equal, regT0, TrustedImm32(GlobalProperty));
Jump notGlobalPropertyWithVarInjections = branch32(NotEqual, regT0, TrustedImm32(GlobalPropertyWithVarInjectionChecks));
isGlobalProperty.link(this);
emitCode(GlobalProperty, false);
skipToEnd.append(jump());
notGlobalPropertyWithVarInjections.link(this);
Jump notGlobalLexicalVar = branch32(NotEqual, regT0, TrustedImm32(GlobalLexicalVar));
emitCode(GlobalLexicalVar, true);
skipToEnd.append(jump());
notGlobalLexicalVar.link(this);
Jump notGlobalLexicalVarWithVarInjections = branch32(NotEqual, regT0, TrustedImm32(GlobalLexicalVarWithVarInjectionChecks));
emitCode(GlobalLexicalVarWithVarInjectionChecks, true);
skipToEnd.append(jump());
notGlobalLexicalVarWithVarInjections.link(this);
addSlowCase(jump());
skipToEnd.link(this);
break;
}
default:
emitCode(resolveType, false);
break;
}
emitValueProfilingSite(bytecode.metadata(m_codeBlock), JSValueRegs(regT1, regT0));
emitStore(dst, regT1, regT0);
}
void JIT::emitSlow_op_get_from_scope(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
auto bytecode = currentInstruction->as<OpGetFromScope>();
VirtualRegister dst = bytecode.m_dst;
callOperationWithProfile(bytecode.metadata(m_codeBlock), operationGetFromScope, dst, m_codeBlock->globalObject(), currentInstruction);
}
void JIT::emitPutGlobalVariable(JSValue* operand, VirtualRegister value, WatchpointSet* set)
{
emitLoad(value, regT1, regT0);
emitNotifyWrite(set);
uintptr_t rawAddress = bitwise_cast<uintptr_t>(operand);
store32(regT1, bitwise_cast<void*>(rawAddress + TagOffset));
store32(regT0, bitwise_cast<void*>(rawAddress + PayloadOffset));
}
void JIT::emitPutGlobalVariableIndirect(JSValue** addressOfOperand, VirtualRegister value, WatchpointSet** indirectWatchpointSet)
{
emitLoad(value, regT1, regT0);
loadPtr(indirectWatchpointSet, regT2);
emitNotifyWrite(regT2);
loadPtr(addressOfOperand, regT2);
store32(regT1, Address(regT2, TagOffset));
store32(regT0, Address(regT2, PayloadOffset));
}
void JIT::emitPutClosureVar(VirtualRegister scope, uintptr_t operand, VirtualRegister value, WatchpointSet* set)
{
emitLoad(value, regT3, regT2);
emitLoad(scope, regT1, regT0);
emitNotifyWrite(set);
store32(regT3, Address(regT0, JSLexicalEnvironment::offsetOfVariables() + operand * sizeof(Register) + TagOffset));
store32(regT2, Address(regT0, JSLexicalEnvironment::offsetOfVariables() + operand * sizeof(Register) + PayloadOffset));
}
void JIT::emit_op_put_to_scope(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutToScope>();
auto& metadata = bytecode.metadata(m_codeBlock);
VirtualRegister scope = bytecode.m_scope;
VirtualRegister value = bytecode.m_value;
GetPutInfo getPutInfo = copiedGetPutInfo(bytecode);
ResolveType resolveType = getPutInfo.resolveType();
Structure** structureSlot = metadata.m_structure.slot();
uintptr_t* operandSlot = reinterpret_cast<uintptr_t*>(&metadata.m_operand);
auto emitCode = [&] (ResolveType resolveType, bool indirectLoadForOperand) {
switch (resolveType) {
case GlobalProperty:
case GlobalPropertyWithVarInjectionChecks: {
emitWriteBarrier(m_codeBlock->globalObject(), value, ShouldFilterValue);
emitLoadWithStructureCheck(scope, structureSlot); // Structure check covers var injection.
emitLoad(value, regT3, regT2);
loadPtr(Address(regT0, JSObject::butterflyOffset()), regT0);
loadPtr(operandSlot, regT1);
negPtr(regT1);
store32(regT3, BaseIndex(regT0, regT1, TimesEight, (firstOutOfLineOffset - 2) * sizeof(EncodedJSValue) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.tag)));
store32(regT2, BaseIndex(regT0, regT1, TimesEight, (firstOutOfLineOffset - 2) * sizeof(EncodedJSValue) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.payload)));
break;
}
case GlobalVar:
case GlobalVarWithVarInjectionChecks:
case GlobalLexicalVar:
case GlobalLexicalVarWithVarInjectionChecks: {
JSScope* constantScope = JSScope::constantScopeForCodeBlock(resolveType, m_codeBlock);
RELEASE_ASSERT(constantScope);
emitWriteBarrier(constantScope, value, ShouldFilterValue);
emitVarInjectionCheck(needsVarInjectionChecks(resolveType));
if (!isInitialization(getPutInfo.initializationMode()) && (resolveType == GlobalLexicalVar || resolveType == GlobalLexicalVarWithVarInjectionChecks)) {
// We need to do a TDZ check here because we can't always prove we need to emit TDZ checks statically.
if (indirectLoadForOperand)
emitGetVarFromIndirectPointer(bitwise_cast<JSValue**>(operandSlot), regT1, regT0);
else
emitGetVarFromPointer(bitwise_cast<JSValue*>(*operandSlot), regT1, regT0);
addSlowCase(branchIfEmpty(regT1));
}
if (indirectLoadForOperand)
emitPutGlobalVariableIndirect(bitwise_cast<JSValue**>(operandSlot), value, &metadata.m_watchpointSet);
else
emitPutGlobalVariable(bitwise_cast<JSValue*>(*operandSlot), value, metadata.m_watchpointSet);
break;
}
case LocalClosureVar:
case ClosureVar:
case ClosureVarWithVarInjectionChecks:
emitWriteBarrier(scope, value, ShouldFilterValue);
emitVarInjectionCheck(needsVarInjectionChecks(resolveType));
emitPutClosureVar(scope, *operandSlot, value, metadata.m_watchpointSet);
break;
case ModuleVar:
case Dynamic:
addSlowCase(jump());
break;
case UnresolvedProperty:
case UnresolvedPropertyWithVarInjectionChecks:
RELEASE_ASSERT_NOT_REACHED();
}
};
switch (resolveType) {
case GlobalProperty:
case GlobalPropertyWithVarInjectionChecks: {
JumpList skipToEnd;
load32(&metadata.m_getPutInfo, regT0);
and32(TrustedImm32(GetPutInfo::typeBits), regT0); // Load ResolveType into T0
Jump isGlobalProperty = branch32(Equal, regT0, TrustedImm32(resolveType));
Jump isGlobalLexicalVar = branch32(Equal, regT0, TrustedImm32(needsVarInjectionChecks(resolveType) ? GlobalLexicalVarWithVarInjectionChecks : GlobalLexicalVar));
addSlowCase(jump()); // Dynamic, it can happen if we attempt to put a value to already-initialized const binding.
isGlobalLexicalVar.link(this);
emitCode(needsVarInjectionChecks(resolveType) ? GlobalLexicalVarWithVarInjectionChecks : GlobalLexicalVar, true);
skipToEnd.append(jump());
isGlobalProperty.link(this);
emitCode(resolveType, false);
skipToEnd.link(this);
break;
}
case UnresolvedProperty:
case UnresolvedPropertyWithVarInjectionChecks: {
JumpList skipToEnd;
load32(&metadata.m_getPutInfo, regT0);
and32(TrustedImm32(GetPutInfo::typeBits), regT0); // Load ResolveType into T0
Jump isGlobalProperty = branch32(Equal, regT0, TrustedImm32(GlobalProperty));
Jump notGlobalPropertyWithVarInjections = branch32(NotEqual, regT0, TrustedImm32(GlobalPropertyWithVarInjectionChecks));
isGlobalProperty.link(this);
emitCode(GlobalProperty, false);
skipToEnd.append(jump());
notGlobalPropertyWithVarInjections.link(this);
Jump notGlobalLexicalVar = branch32(NotEqual, regT0, TrustedImm32(GlobalLexicalVar));
emitCode(GlobalLexicalVar, true);
skipToEnd.append(jump());
notGlobalLexicalVar.link(this);
Jump notGlobalLexicalVarWithVarInjections = branch32(NotEqual, regT0, TrustedImm32(GlobalLexicalVarWithVarInjectionChecks));
emitCode(GlobalLexicalVarWithVarInjectionChecks, true);
skipToEnd.append(jump());
notGlobalLexicalVarWithVarInjections.link(this);
addSlowCase(jump());
skipToEnd.link(this);
break;
}
default:
emitCode(resolveType, false);
break;
}
}
void JIT::emitSlow_op_put_to_scope(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
auto bytecode = currentInstruction->as<OpPutToScope>();
ResolveType resolveType = copiedGetPutInfo(bytecode).resolveType();
if (resolveType == ModuleVar) {
JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_throw_strict_mode_readonly_property_write_error);
slowPathCall.call();
} else
callOperation(operationPutToScope, m_codeBlock->globalObject(), currentInstruction);
}
void JIT::emit_op_get_from_arguments(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpGetFromArguments>();
VirtualRegister dst = bytecode.m_dst;
VirtualRegister arguments = bytecode.m_arguments;
int index = bytecode.m_index;
JSValueRegs resutlRegs = JSValueRegs(regT1, regT0);
emitLoadPayload(arguments, regT0);
load32(Address(regT0, DirectArguments::storageOffset() + index * sizeof(WriteBarrier<Unknown>) + TagOffset), resutlRegs.tagGPR());
load32(Address(regT0, DirectArguments::storageOffset() + index * sizeof(WriteBarrier<Unknown>) + PayloadOffset), resutlRegs.payloadGPR());
emitValueProfilingSite(bytecode.metadata(m_codeBlock), resutlRegs);
emitStore(dst, resutlRegs.tagGPR(), resutlRegs.payloadGPR());
}
void JIT::emit_op_put_to_arguments(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutToArguments>();
VirtualRegister arguments = bytecode.m_arguments;
int index = bytecode.m_index;
VirtualRegister value = bytecode.m_value;
emitWriteBarrier(arguments, value, ShouldFilterValue);
emitLoadPayload(arguments, regT0);
emitLoad(value, regT1, regT2);
store32(regT1, Address(regT0, DirectArguments::storageOffset() + index * sizeof(WriteBarrier<Unknown>) + TagOffset));
store32(regT2, Address(regT0, DirectArguments::storageOffset() + index * sizeof(WriteBarrier<Unknown>) + PayloadOffset));
}
void JIT::emit_op_get_internal_field(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpGetInternalField>();
auto& metadata = bytecode.metadata(m_codeBlock);
VirtualRegister dst = bytecode.m_dst;
VirtualRegister base = bytecode.m_base;
unsigned index = bytecode.m_index;
JSValueRegs resultRegs = JSValueRegs(regT1, regT0);
emitLoadPayload(base, regT2);
load32(Address(regT2, JSInternalFieldObjectImpl<>::offsetOfInternalField(index) + TagOffset), resultRegs.tagGPR());
load32(Address(regT2, JSInternalFieldObjectImpl<>::offsetOfInternalField(index) + PayloadOffset), resultRegs.payloadGPR());
emitValueProfilingSite(metadata, resultRegs);
emitStore(dst, resultRegs.tagGPR(), resultRegs.payloadGPR());
}
void JIT::emit_op_put_internal_field(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutInternalField>();
VirtualRegister base = bytecode.m_base;
VirtualRegister value = bytecode.m_value;
unsigned index = bytecode.m_index;
emitLoadPayload(base, regT0);
emitLoad(value, regT1, regT2);
store32(regT1, Address(regT0, JSInternalFieldObjectImpl<>::offsetOfInternalField(index) + TagOffset));
store32(regT2, Address(regT0, JSInternalFieldObjectImpl<>::offsetOfInternalField(index) + PayloadOffset));
emitWriteBarrier(base, value, ShouldFilterValue);
}
template void JIT::emit_op_put_by_val<OpPutByVal>(const Instruction*);
} // namespace JSC
#endif // USE(JSVALUE32_64)
#endif // ENABLE(JIT)
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