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JITPropertyAccess.cpp
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2148 lines (1755 loc) · 93.7 KB
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/*
* Copyright (C) 2008-2022 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)
#include "JIT.h"
#include "BaselineJITRegisters.h"
#include "CacheableIdentifierInlines.h"
#include "CodeBlock.h"
#include "DirectArguments.h"
#include "JITInlines.h"
#include "JITThunks.h"
#include "JSLexicalEnvironment.h"
#include "LinkBuffer.h"
#include "PrivateFieldPutKind.h"
#include "ProbeContext.h"
#include "SlowPathCall.h"
#include "StructureStubInfo.h"
#include "ThunkGenerators.h"
#include <wtf/ScopedLambda.h>
#include <wtf/StringPrintStream.h>
namespace JSC {
void JIT::emit_op_get_by_val(const JSInstruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpGetByVal>();
VirtualRegister dst = bytecode.m_dst;
VirtualRegister base = bytecode.m_base;
VirtualRegister property = bytecode.m_property;
using BaselineJITRegisters::GetByVal::baseJSR;
using BaselineJITRegisters::GetByVal::propertyJSR;
using BaselineJITRegisters::GetByVal::resultJSR;
using BaselineJITRegisters::GetByVal::stubInfoGPR;
using BaselineJITRegisters::GetByVal::profileGPR;
using BaselineJITRegisters::GetByVal::scratch1GPR;
emitGetVirtualRegister(base, baseJSR);
emitGetVirtualRegister(property, propertyJSR);
auto [ stubInfo, stubInfoIndex ] = addUnlinkedStructureStubInfo();
loadStructureStubInfo(stubInfoIndex, stubInfoGPR);
materializePointerIntoMetadata(bytecode, OpGetByVal::Metadata::offsetOfArrayProfile(), profileGPR);
JITGetByValGenerator gen(
nullptr, stubInfo, JITType::BaselineJIT, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), AccessType::GetByVal, RegisterSetBuilder::stubUnavailableRegisters(),
baseJSR, propertyJSR, resultJSR, profileGPR, stubInfoGPR);
if (isOperandConstantInt(property))
stubInfo->propertyIsInt32 = true;
if (bytecode.metadata(m_profiledCodeBlock).m_seenIdentifiers.count() > Options::getByValICMaxNumberOfIdentifiers())
stubInfo->canBeMegamorphic = true;
emitJumpSlowCaseIfNotJSCell(baseJSR, base);
emitArrayProfilingSiteWithCellAndProfile(baseJSR.payloadGPR(), profileGPR, scratch1GPR);
gen.generateBaselineDataICFastPath(*this);
addSlowCase();
m_getByVals.append(gen);
resetSP(); // We might OSR exit here, so we need to conservatively reset SP
setFastPathResumePoint();
emitValueProfilingSite(bytecode, resultJSR);
emitPutVirtualRegister(dst, resultJSR);
}
template<typename OpcodeType>
void JIT::generateGetByValSlowCase(const OpcodeType&, Vector<SlowCaseEntry>::iterator& iter)
{
ASSERT(hasAnySlowCases(iter));
ASSERT(BytecodeIndex(m_bytecodeIndex.offset()) == m_bytecodeIndex);
JITGetByValGenerator& gen = m_getByVals[m_getByValIndex++];
linkAllSlowCases(iter);
gen.reportBaselineDataICSlowPathBegin(label());
emitNakedNearCall(InlineCacheCompiler::generateSlowPathCode(vm(), gen.accessType()).retaggedCode<NoPtrTag>());
}
void JIT::emitSlow_op_get_by_val(const JSInstruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
generateGetByValSlowCase(currentInstruction->as<OpGetByVal>(), iter);
}
void JIT::emit_op_get_private_name(const JSInstruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpGetPrivateName>();
VirtualRegister dst = bytecode.m_dst;
VirtualRegister base = bytecode.m_base;
VirtualRegister property = bytecode.m_property;
using BaselineJITRegisters::GetByVal::baseJSR;
using BaselineJITRegisters::GetByVal::propertyJSR;
using BaselineJITRegisters::GetByVal::resultJSR;
using BaselineJITRegisters::GetByVal::stubInfoGPR;
emitGetVirtualRegister(base, baseJSR);
emitGetVirtualRegister(property, propertyJSR);
auto [ stubInfo, stubInfoIndex ] = addUnlinkedStructureStubInfo();
loadStructureStubInfo(stubInfoIndex, stubInfoGPR);
emitJumpSlowCaseIfNotJSCell(baseJSR, base);
JITGetByValGenerator gen(
nullptr, stubInfo, JITType::BaselineJIT, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), AccessType::GetPrivateName,
RegisterSetBuilder::stubUnavailableRegisters(), baseJSR, propertyJSR, resultJSR, InvalidGPRReg, stubInfoGPR);
gen.generateBaselineDataICFastPath(*this);
addSlowCase();
m_getByVals.append(gen);
setFastPathResumePoint();
emitValueProfilingSite(bytecode, resultJSR);
emitPutVirtualRegister(dst, resultJSR);
}
void JIT::emitSlow_op_get_private_name(const JSInstruction*, Vector<SlowCaseEntry>::iterator& iter)
{
ASSERT(hasAnySlowCases(iter));
ASSERT(BytecodeIndex(m_bytecodeIndex.offset()) == m_bytecodeIndex);
JITGetByValGenerator& gen = m_getByVals[m_getByValIndex++];
linkAllSlowCases(iter);
gen.reportBaselineDataICSlowPathBegin(label());
emitNakedNearCall(InlineCacheCompiler::generateSlowPathCode(vm(), gen.accessType()).retaggedCode<NoPtrTag>());
}
void JIT::emit_op_set_private_brand(const JSInstruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpSetPrivateBrand>();
VirtualRegister base = bytecode.m_base;
VirtualRegister brand = bytecode.m_brand;
using BaselineJITRegisters::PrivateBrand::baseJSR;
using BaselineJITRegisters::PrivateBrand::propertyJSR;
using BaselineJITRegisters::PrivateBrand::stubInfoGPR;
emitGetVirtualRegister(base, baseJSR);
emitGetVirtualRegister(brand, propertyJSR);
auto [ stubInfo, stubInfoIndex ] = addUnlinkedStructureStubInfo();
loadStructureStubInfo(stubInfoIndex, stubInfoGPR);
emitJumpSlowCaseIfNotJSCell(baseJSR, base);
JITPrivateBrandAccessGenerator gen(
nullptr, stubInfo, JITType::BaselineJIT, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), AccessType::SetPrivateBrand, RegisterSetBuilder::stubUnavailableRegisters(),
baseJSR, propertyJSR, stubInfoGPR);
gen.generateBaselineDataICFastPath(*this);
addSlowCase();
m_privateBrandAccesses.append(gen);
// 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_set_private_brand(const JSInstruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
UNUSED_PARAM(currentInstruction);
ASSERT(BytecodeIndex(m_bytecodeIndex.offset()) == m_bytecodeIndex);
JITPrivateBrandAccessGenerator& gen = m_privateBrandAccesses[m_privateBrandAccessIndex++];
linkAllSlowCases(iter);
gen.reportBaselineDataICSlowPathBegin(label());
emitNakedNearCall(InlineCacheCompiler::generateSlowPathCode(vm(), gen.accessType()).retaggedCode<NoPtrTag>());
}
void JIT::emit_op_check_private_brand(const JSInstruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpCheckPrivateBrand>();
VirtualRegister base = bytecode.m_base;
VirtualRegister brand = bytecode.m_brand;
using BaselineJITRegisters::PrivateBrand::baseJSR;
using BaselineJITRegisters::PrivateBrand::propertyJSR;
using BaselineJITRegisters::PrivateBrand::stubInfoGPR;
emitGetVirtualRegister(base, baseJSR);
emitGetVirtualRegister(brand, propertyJSR);
auto [ stubInfo, stubInfoIndex ] = addUnlinkedStructureStubInfo();
loadStructureStubInfo(stubInfoIndex, stubInfoGPR);
emitJumpSlowCaseIfNotJSCell(baseJSR, base);
JITPrivateBrandAccessGenerator gen(
nullptr, stubInfo, JITType::BaselineJIT, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), AccessType::CheckPrivateBrand, RegisterSetBuilder::stubUnavailableRegisters(),
baseJSR, propertyJSR, stubInfoGPR);
gen.generateBaselineDataICFastPath(*this);
addSlowCase();
m_privateBrandAccesses.append(gen);
}
void JIT::emitSlow_op_check_private_brand(const JSInstruction*, Vector<SlowCaseEntry>::iterator& iter)
{
ASSERT(BytecodeIndex(m_bytecodeIndex.offset()) == m_bytecodeIndex);
JITPrivateBrandAccessGenerator& gen = m_privateBrandAccesses[m_privateBrandAccessIndex++];
linkAllSlowCases(iter);
gen.reportBaselineDataICSlowPathBegin(label());
emitNakedNearCall(InlineCacheCompiler::generateSlowPathCode(vm(), gen.accessType()).retaggedCode<NoPtrTag>());
}
template<typename Op>
void JIT::emit_op_put_by_val(const JSInstruction* currentInstruction)
{
auto bytecode = currentInstruction->as<Op>();
VirtualRegister base = bytecode.m_base;
VirtualRegister property = bytecode.m_property;
VirtualRegister value = bytecode.m_value;
using BaselineJITRegisters::PutByVal::baseJSR;
using BaselineJITRegisters::PutByVal::propertyJSR;
using BaselineJITRegisters::PutByVal::valueJSR;
using BaselineJITRegisters::PutByVal::profileGPR; // Keep in mind that this can be a metadataTable register in ARMv7.
using BaselineJITRegisters::PutByVal::stubInfoGPR;
using BaselineJITRegisters::PutByVal::scratch1GPR;
emitGetVirtualRegister(base, baseJSR);
emitGetVirtualRegister(property, propertyJSR);
emitGetVirtualRegister(value, valueJSR);
auto [ stubInfo, stubInfoIndex ] = addUnlinkedStructureStubInfo();
loadStructureStubInfo(stubInfoIndex, stubInfoGPR);
materializePointerIntoMetadata(bytecode, Op::Metadata::offsetOfArrayProfile(), profileGPR);
emitJumpSlowCaseIfNotJSCell(baseJSR, base);
emitArrayProfilingSiteWithCellAndProfile(baseJSR.payloadGPR(), profileGPR, scratch1GPR);
ECMAMode ecmaMode = this->ecmaMode(bytecode);
bool isDirect = std::is_same_v<Op, OpPutByValDirect>;
JITPutByValGenerator gen(
nullptr, stubInfo, JITType::BaselineJIT, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex),
isDirect ? (ecmaMode.isStrict() ? AccessType::PutByValDirectStrict : AccessType::PutByValDirectSloppy) : (ecmaMode.isStrict() ? AccessType::PutByValStrict : AccessType::PutByValSloppy),
RegisterSetBuilder::stubUnavailableRegisters(),
baseJSR, propertyJSR, valueJSR, profileGPR, stubInfoGPR, ecmaMode);
if (isOperandConstantInt(property))
stubInfo->propertyIsInt32 = true;
gen.generateBaselineDataICFastPath(*this);
resetSP(); // We might OSR exit here, so we need to conservatively reset SP
#if CPU(ARM_THUMB2)
// ARMv7 clobbers metadataTable register. Thus we need to restore them back here.
emitMaterializeMetadataAndConstantPoolRegisters();
#endif
addSlowCase();
m_putByVals.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);
setFastPathResumePoint();
}
template void JIT::emit_op_put_by_val<OpPutByVal>(const JSInstruction*);
void JIT::emit_op_put_by_val_direct(const JSInstruction* currentInstruction)
{
emit_op_put_by_val<OpPutByValDirect>(currentInstruction);
}
template<typename OpcodeType>
void JIT::generatePutByValSlowCase(const OpcodeType&, Vector<SlowCaseEntry>::iterator& iter)
{
ASSERT(hasAnySlowCases(iter));
ASSERT(BytecodeIndex(m_bytecodeIndex.offset()) == m_bytecodeIndex);
JITPutByValGenerator& gen = m_putByVals[m_putByValIndex++];
linkAllSlowCases(iter);
gen.reportBaselineDataICSlowPathBegin(label());
emitNakedNearCall(InlineCacheCompiler::generateSlowPathCode(vm(), gen.accessType()).retaggedCode<NoPtrTag>());
}
void JIT::emitSlow_op_put_by_val(const JSInstruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
generatePutByValSlowCase(currentInstruction->as<OpPutByVal>(), iter);
}
void JIT::emitSlow_op_put_by_val_direct(const JSInstruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
generatePutByValSlowCase(currentInstruction->as<OpPutByValDirect>(), iter);
}
void JIT::emit_op_put_private_name(const JSInstruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutPrivateName>();
VirtualRegister base = bytecode.m_base;
VirtualRegister property = bytecode.m_property;
VirtualRegister value = bytecode.m_value;
using BaselineJITRegisters::PutByVal::baseJSR;
using BaselineJITRegisters::PutByVal::propertyJSR;
using BaselineJITRegisters::PutByVal::valueJSR;
using BaselineJITRegisters::PutByVal::stubInfoGPR;
emitGetVirtualRegister(base, baseJSR);
emitGetVirtualRegister(property, propertyJSR);
emitGetVirtualRegister(value, valueJSR);
auto [ stubInfo, stubInfoIndex ] = addUnlinkedStructureStubInfo();
loadStructureStubInfo(stubInfoIndex, stubInfoGPR);
emitJumpSlowCaseIfNotJSCell(baseJSR, base);
JITPutByValGenerator gen(
nullptr, stubInfo, JITType::BaselineJIT, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), bytecode.m_putKind.isDefine() ? AccessType::DefinePrivateNameByVal : AccessType::SetPrivateNameByVal, RegisterSetBuilder::stubUnavailableRegisters(),
baseJSR, propertyJSR, valueJSR, InvalidGPRReg, stubInfoGPR, ECMAMode::sloppy());
gen.generateBaselineDataICFastPath(*this);
addSlowCase();
m_putByVals.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_private_name(const JSInstruction*, Vector<SlowCaseEntry>::iterator& iter)
{
ASSERT(BytecodeIndex(m_bytecodeIndex.offset()) == m_bytecodeIndex);
JITPutByValGenerator& gen = m_putByVals[m_putByValIndex++];
linkAllSlowCases(iter);
gen.reportBaselineDataICSlowPathBegin(label());
emitNakedNearCall(InlineCacheCompiler::generateSlowPathCode(vm(), gen.accessType()).retaggedCode<NoPtrTag>());
}
void JIT::emit_op_put_getter_by_id(const JSInstruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutGetterById>();
emitGetVirtualRegisterPayload(bytecode.m_base, regT0);
int32_t options = bytecode.m_attributes;
emitGetVirtualRegisterPayload(bytecode.m_accessor, regT1);
loadGlobalObject(regT2);
callOperation(operationPutGetterById, regT2, regT0, TrustedImmPtr(m_unlinkedCodeBlock->identifier(bytecode.m_property).impl()), options, regT1);
}
void JIT::emit_op_put_setter_by_id(const JSInstruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutSetterById>();
emitGetVirtualRegisterPayload(bytecode.m_base, regT0);
int32_t options = bytecode.m_attributes;
emitGetVirtualRegisterPayload(bytecode.m_accessor, regT1);
loadGlobalObject(regT2);
callOperation(operationPutSetterById, regT2, regT0, TrustedImmPtr(m_unlinkedCodeBlock->identifier(bytecode.m_property).impl()), options, regT1);
}
void JIT::emit_op_put_getter_setter_by_id(const JSInstruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutGetterSetterById>();
emitGetVirtualRegisterPayload(bytecode.m_base, regT0);
int32_t attribute = bytecode.m_attributes;
emitGetVirtualRegisterPayload(bytecode.m_getter, regT1);
emitGetVirtualRegisterPayload(bytecode.m_setter, regT2);
loadGlobalObject(regT3);
callOperation(operationPutGetterSetter, regT3, regT0, TrustedImmPtr(m_unlinkedCodeBlock->identifier(bytecode.m_property).impl()), attribute, regT1, regT2);
}
void JIT::emit_op_put_getter_by_val(const JSInstruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutGetterByVal>();
using SlowOperation = decltype(operationPutGetterByVal);
constexpr GPRReg globalObjectGRP = preferredArgumentGPR<SlowOperation, 0>();
constexpr GPRReg baseGPR = preferredArgumentGPR<SlowOperation, 1>();
constexpr JSValueRegs propertyJSR = preferredArgumentJSR<SlowOperation, 2>();
// Attributes in argument 3
constexpr GPRReg setterGPR = preferredArgumentGPR<SlowOperation, 4>();
emitGetVirtualRegisterPayload(bytecode.m_base, baseGPR);
emitGetVirtualRegister(bytecode.m_property, propertyJSR);
int32_t attributes = bytecode.m_attributes;
emitGetVirtualRegisterPayload(bytecode.m_accessor, setterGPR);
loadGlobalObject(globalObjectGRP);
callOperation(operationPutGetterByVal, globalObjectGRP, baseGPR, propertyJSR, attributes, setterGPR);
}
void JIT::emit_op_put_setter_by_val(const JSInstruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutSetterByVal>();
using SlowOperation = decltype(operationPutSetterByVal);
constexpr GPRReg globalObjectGRP = preferredArgumentGPR<SlowOperation, 0>();
constexpr GPRReg baseGPR = preferredArgumentGPR<SlowOperation, 1>();
constexpr JSValueRegs propertyJSR = preferredArgumentJSR<SlowOperation, 2>();
// Attributes in argument 3
constexpr GPRReg setterGPR = preferredArgumentGPR<SlowOperation, 4>();
emitGetVirtualRegisterPayload(bytecode.m_base, baseGPR);
emitGetVirtualRegister(bytecode.m_property, propertyJSR);
int32_t attributes = bytecode.m_attributes;
emitGetVirtualRegisterPayload(bytecode.m_accessor, setterGPR);
loadGlobalObject(globalObjectGRP);
callOperation(operationPutSetterByVal, globalObjectGRP, baseGPR, propertyJSR, attributes, setterGPR);
}
void JIT::emit_op_del_by_id(const JSInstruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpDelById>();
VirtualRegister dst = bytecode.m_dst;
VirtualRegister base = bytecode.m_base;
ECMAMode ecmaMode = bytecode.m_ecmaMode;
const Identifier* ident = &(m_unlinkedCodeBlock->identifier(bytecode.m_property));
using BaselineJITRegisters::DelById::baseJSR;
using BaselineJITRegisters::DelById::resultJSR;
using BaselineJITRegisters::DelById::stubInfoGPR;
emitGetVirtualRegister(base, baseJSR);
auto [ stubInfo, stubInfoIndex ] = addUnlinkedStructureStubInfo();
loadStructureStubInfo(stubInfoIndex, stubInfoGPR);
emitJumpSlowCaseIfNotJSCell(baseJSR, base);
JITDelByIdGenerator gen(
nullptr, stubInfo, JITType::BaselineJIT, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), ecmaMode.isStrict() ? AccessType::DeleteByIdStrict : AccessType::DeleteByIdSloppy, RegisterSetBuilder::stubUnavailableRegisters(),
CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_unlinkedCodeBlock, *ident),
baseJSR, resultJSR, stubInfoGPR);
gen.generateBaselineDataICFastPath(*this);
addSlowCase();
m_delByIds.append(gen);
setFastPathResumePoint();
boxBoolean(resultJSR.payloadGPR(), resultJSR);
emitPutVirtualRegister(dst, resultJSR);
// 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::emitSlow_op_del_by_id(const JSInstruction*, Vector<SlowCaseEntry>::iterator& iter)
{
ASSERT(BytecodeIndex(m_bytecodeIndex.offset()) == m_bytecodeIndex);
JITDelByIdGenerator& gen = m_delByIds[m_delByIdIndex++];
linkAllSlowCases(iter);
gen.reportBaselineDataICSlowPathBegin(label());
emitNakedNearCall(InlineCacheCompiler::generateSlowPathCode(vm(), gen.accessType()).retaggedCode<NoPtrTag>());
}
void JIT::emit_op_del_by_val(const JSInstruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpDelByVal>();
VirtualRegister dst = bytecode.m_dst;
VirtualRegister base = bytecode.m_base;
VirtualRegister property = bytecode.m_property;
using BaselineJITRegisters::DelByVal::baseJSR;
using BaselineJITRegisters::DelByVal::propertyJSR;
using BaselineJITRegisters::DelByVal::resultJSR;
using BaselineJITRegisters::DelByVal::stubInfoGPR;
emitGetVirtualRegister(base, baseJSR);
emitGetVirtualRegister(property, propertyJSR);
auto [ stubInfo, stubInfoIndex ] = addUnlinkedStructureStubInfo();
loadStructureStubInfo(stubInfoIndex, stubInfoGPR);
emitJumpSlowCaseIfNotJSCell(baseJSR, base);
emitJumpSlowCaseIfNotJSCell(propertyJSR, property);
JITDelByValGenerator gen(
nullptr, stubInfo, JITType::BaselineJIT, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex),
bytecode.m_ecmaMode.isStrict() ? AccessType::DeleteByValStrict : AccessType::DeleteByValSloppy,
RegisterSetBuilder::stubUnavailableRegisters(),
baseJSR, propertyJSR, resultJSR, stubInfoGPR);
gen.generateBaselineDataICFastPath(*this);
addSlowCase();
m_delByVals.append(gen);
setFastPathResumePoint();
boxBoolean(resultJSR.payloadGPR(), resultJSR);
emitPutVirtualRegister(dst, resultJSR);
// 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 JSInstruction*, Vector<SlowCaseEntry>::iterator& iter)
{
ASSERT(BytecodeIndex(m_bytecodeIndex.offset()) == m_bytecodeIndex);
JITDelByValGenerator& gen = m_delByVals[m_delByValIndex++];
linkAllSlowCases(iter);
gen.reportBaselineDataICSlowPathBegin(label());
emitNakedNearCall(InlineCacheCompiler::generateSlowPathCode(vm(), gen.accessType()).retaggedCode<NoPtrTag>());
}
void JIT::emit_op_try_get_by_id(const JSInstruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpTryGetById>();
VirtualRegister resultVReg = bytecode.m_dst;
VirtualRegister baseVReg = bytecode.m_base;
const Identifier* ident = &(m_unlinkedCodeBlock->identifier(bytecode.m_property));
using BaselineJITRegisters::GetById::baseJSR;
using BaselineJITRegisters::GetById::resultJSR;
using BaselineJITRegisters::GetById::stubInfoGPR;
emitGetVirtualRegister(baseVReg, baseJSR);
auto [ stubInfo, stubInfoIndex ] = addUnlinkedStructureStubInfo();
loadStructureStubInfo(stubInfoIndex, stubInfoGPR);
emitJumpSlowCaseIfNotJSCell(baseJSR, baseVReg);
JITGetByIdGenerator gen(
nullptr, stubInfo, JITType::BaselineJIT, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSetBuilder::stubUnavailableRegisters(),
CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_unlinkedCodeBlock, *ident), baseJSR, resultJSR, stubInfoGPR, AccessType::TryGetById);
gen.generateBaselineDataICFastPath(*this);
addSlowCase();
m_getByIds.append(gen);
setFastPathResumePoint();
emitValueProfilingSite(bytecode, resultJSR);
emitPutVirtualRegister(resultVReg, resultJSR);
}
void JIT::emitSlow_op_try_get_by_id(const JSInstruction*, Vector<SlowCaseEntry>::iterator& iter)
{
ASSERT(BytecodeIndex(m_bytecodeIndex.offset()) == m_bytecodeIndex);
JITGetByIdGenerator& gen = m_getByIds[m_getByIdIndex++];
linkAllSlowCases(iter);
gen.reportBaselineDataICSlowPathBegin(label());
emitNakedNearCall(InlineCacheCompiler::generateSlowPathCode(vm(), gen.accessType()).retaggedCode<NoPtrTag>());
}
void JIT::emit_op_get_by_id_direct(const JSInstruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpGetByIdDirect>();
VirtualRegister resultVReg = bytecode.m_dst;
VirtualRegister baseVReg = bytecode.m_base;
const Identifier* ident = &(m_unlinkedCodeBlock->identifier(bytecode.m_property));
using BaselineJITRegisters::GetById::baseJSR;
using BaselineJITRegisters::GetById::resultJSR;
using BaselineJITRegisters::GetById::stubInfoGPR;
emitGetVirtualRegister(baseVReg, baseJSR);
auto [ stubInfo, stubInfoIndex ] = addUnlinkedStructureStubInfo();
loadStructureStubInfo(stubInfoIndex, stubInfoGPR);
emitJumpSlowCaseIfNotJSCell(baseJSR, baseVReg);
JITGetByIdGenerator gen(
nullptr, stubInfo, JITType::BaselineJIT, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSetBuilder::stubUnavailableRegisters(),
CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_unlinkedCodeBlock, *ident), baseJSR, resultJSR, stubInfoGPR, AccessType::GetByIdDirect);
gen.generateBaselineDataICFastPath(*this);
addSlowCase();
m_getByIds.append(gen);
setFastPathResumePoint();
emitValueProfilingSite(bytecode, resultJSR);
emitPutVirtualRegister(resultVReg, resultJSR);
}
void JIT::emitSlow_op_get_by_id_direct(const JSInstruction*, Vector<SlowCaseEntry>::iterator& iter)
{
ASSERT(BytecodeIndex(m_bytecodeIndex.offset()) == m_bytecodeIndex);
JITGetByIdGenerator& gen = m_getByIds[m_getByIdIndex++];
linkAllSlowCases(iter);
gen.reportBaselineDataICSlowPathBegin(label());
emitNakedNearCall(InlineCacheCompiler::generateSlowPathCode(vm(), gen.accessType()).retaggedCode<NoPtrTag>());
}
void JIT::emit_op_get_by_id(const JSInstruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpGetById>();
VirtualRegister resultVReg = bytecode.m_dst;
VirtualRegister baseVReg = bytecode.m_base;
const Identifier* ident = &(m_unlinkedCodeBlock->identifier(bytecode.m_property));
using BaselineJITRegisters::GetById::baseJSR;
using BaselineJITRegisters::GetById::resultJSR;
using BaselineJITRegisters::GetById::stubInfoGPR;
using BaselineJITRegisters::GetById::scratch1GPR;
emitGetVirtualRegister(baseVReg, baseJSR);
auto [ stubInfo, stubInfoIndex ] = addUnlinkedStructureStubInfo();
loadStructureStubInfo(stubInfoIndex, stubInfoGPR);
emitJumpSlowCaseIfNotJSCell(baseJSR, baseVReg);
if (*ident == vm().propertyNames->length && shouldEmitProfiling()) {
load8FromMetadata(bytecode, OpGetById::Metadata::offsetOfModeMetadata() + GetByIdModeMetadata::offsetOfMode(), scratch1GPR);
Jump notArrayLengthMode = branch32(NotEqual, TrustedImm32(static_cast<uint8_t>(GetByIdMode::ArrayLength)), scratch1GPR);
emitArrayProfilingSiteWithCell(
bytecode,
OpGetById::Metadata::offsetOfModeMetadata() + GetByIdModeMetadataArrayLength::offsetOfArrayProfile(),
baseJSR.payloadGPR(), scratch1GPR);
notArrayLengthMode.link(this);
}
JITGetByIdGenerator gen(
nullptr, stubInfo, JITType::BaselineJIT, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSetBuilder::stubUnavailableRegisters(),
CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_unlinkedCodeBlock, *ident), baseJSR, resultJSR, stubInfoGPR, AccessType::GetById);
gen.generateBaselineDataICFastPath(*this);
resetSP(); // We might OSR exit here, so we need to conservatively reset SP
addSlowCase();
m_getByIds.append(gen);
setFastPathResumePoint();
emitValueProfilingSite(bytecode, resultJSR);
emitPutVirtualRegister(resultVReg, resultJSR);
}
void JIT::emitSlow_op_get_by_id(const JSInstruction*, Vector<SlowCaseEntry>::iterator& iter)
{
ASSERT(BytecodeIndex(m_bytecodeIndex.offset()) == m_bytecodeIndex);
JITGetByIdGenerator& gen = m_getByIds[m_getByIdIndex++];
linkAllSlowCases(iter);
gen.reportBaselineDataICSlowPathBegin(label());
emitNakedNearCall(InlineCacheCompiler::generateSlowPathCode(vm(), gen.accessType()).retaggedCode<NoPtrTag>());
}
void JIT::emit_op_get_by_id_with_this(const JSInstruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpGetByIdWithThis>();
VirtualRegister resultVReg = bytecode.m_dst;
VirtualRegister baseVReg = bytecode.m_base;
VirtualRegister thisVReg = bytecode.m_thisValue;
const Identifier* ident = &(m_unlinkedCodeBlock->identifier(bytecode.m_property));
using BaselineJITRegisters::GetByIdWithThis::baseJSR;
using BaselineJITRegisters::GetByIdWithThis::thisJSR;
using BaselineJITRegisters::GetByIdWithThis::resultJSR;
using BaselineJITRegisters::GetByIdWithThis::stubInfoGPR;
emitGetVirtualRegister(baseVReg, baseJSR);
emitGetVirtualRegister(thisVReg, thisJSR);
auto [ stubInfo, stubInfoIndex ] = addUnlinkedStructureStubInfo();
loadStructureStubInfo(stubInfoIndex, stubInfoGPR);
emitJumpSlowCaseIfNotJSCell(baseJSR, baseVReg);
emitJumpSlowCaseIfNotJSCell(thisJSR, thisVReg);
JITGetByIdWithThisGenerator gen(
nullptr, stubInfo, JITType::BaselineJIT, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSetBuilder::stubUnavailableRegisters(),
CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_unlinkedCodeBlock, *ident), resultJSR, baseJSR, thisJSR, stubInfoGPR);
gen.generateBaselineDataICFastPath(*this);
resetSP(); // We might OSR exit here, so we need to conservatively reset SP
addSlowCase();
m_getByIdsWithThis.append(gen);
setFastPathResumePoint();
emitValueProfilingSite(bytecode, resultJSR);
emitPutVirtualRegister(resultVReg, resultJSR);
}
void JIT::emitSlow_op_get_by_id_with_this(const JSInstruction*, Vector<SlowCaseEntry>::iterator& iter)
{
ASSERT(BytecodeIndex(m_bytecodeIndex.offset()) == m_bytecodeIndex);
JITGetByIdWithThisGenerator& gen = m_getByIdsWithThis[m_getByIdWithThisIndex++];
linkAllSlowCases(iter);
gen.reportBaselineDataICSlowPathBegin(label());
emitNakedNearCall(InlineCacheCompiler::generateSlowPathCode(vm(), gen.accessType()).retaggedCode<NoPtrTag>());
}
void JIT::emit_op_put_by_id(const JSInstruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutById>();
VirtualRegister baseVReg = bytecode.m_base;
VirtualRegister valueVReg = bytecode.m_value;
bool direct = bytecode.m_flags.isDirect();
ECMAMode ecmaMode = this->ecmaMode(bytecode);
const Identifier* ident = &(m_unlinkedCodeBlock->identifier(bytecode.m_property));
// 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.
using BaselineJITRegisters::PutById::baseJSR;
using BaselineJITRegisters::PutById::valueJSR;
using BaselineJITRegisters::PutById::stubInfoGPR;
using BaselineJITRegisters::PutById::scratch1GPR;
emitGetVirtualRegister(baseVReg, baseJSR);
emitGetVirtualRegister(valueVReg, valueJSR);
auto [ stubInfo, stubInfoIndex ] = addUnlinkedStructureStubInfo();
loadStructureStubInfo(stubInfoIndex, stubInfoGPR);
emitJumpSlowCaseIfNotJSCell(baseJSR, baseVReg);
JITPutByIdGenerator gen(
nullptr, stubInfo, JITType::BaselineJIT, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSetBuilder::stubUnavailableRegisters(),
CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_unlinkedCodeBlock, *ident),
baseJSR, valueJSR, stubInfoGPR, scratch1GPR, ecmaMode, direct ? (ecmaMode.isStrict() ? AccessType::PutByIdDirectStrict : AccessType::PutByIdDirectSloppy) : (ecmaMode.isStrict() ? AccessType::PutByIdStrict : AccessType::PutByIdSloppy));
gen.generateBaselineDataICFastPath(*this);
resetSP(); // We might OSR exit here, so we need to conservatively reset SP
addSlowCase();
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(baseVReg, ShouldFilterBase);
}
void JIT::emitSlow_op_put_by_id(const JSInstruction*, Vector<SlowCaseEntry>::iterator& iter)
{
ASSERT(BytecodeIndex(m_bytecodeIndex.offset()) == m_bytecodeIndex);
JITPutByIdGenerator& gen = m_putByIds[m_putByIdIndex++];
linkAllSlowCases(iter);
gen.reportBaselineDataICSlowPathBegin(label());
emitNakedNearCall(InlineCacheCompiler::generateSlowPathCode(vm(), gen.accessType()).retaggedCode<NoPtrTag>());
}
void JIT::emit_op_in_by_id(const JSInstruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpInById>();
VirtualRegister resultVReg = bytecode.m_dst;
VirtualRegister baseVReg = bytecode.m_base;
const Identifier* ident = &(m_unlinkedCodeBlock->identifier(bytecode.m_property));
using BaselineJITRegisters::InById::baseJSR;
using BaselineJITRegisters::InById::resultJSR;
using BaselineJITRegisters::InById::stubInfoGPR;
emitGetVirtualRegister(baseVReg, baseJSR);
auto [ stubInfo, stubInfoIndex ] = addUnlinkedStructureStubInfo();
loadStructureStubInfo(stubInfoIndex, stubInfoGPR);
emitJumpSlowCaseIfNotJSCell(baseJSR, baseVReg);
JITInByIdGenerator gen(
nullptr, stubInfo, JITType::BaselineJIT, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSetBuilder::stubUnavailableRegisters(),
CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_unlinkedCodeBlock, *ident), baseJSR, resultJSR, stubInfoGPR);
gen.generateBaselineDataICFastPath(*this);
addSlowCase();
m_inByIds.append(gen);
setFastPathResumePoint();
emitPutVirtualRegister(resultVReg, resultJSR);
}
void JIT::emitSlow_op_in_by_id(const JSInstruction*, Vector<SlowCaseEntry>::iterator& iter)
{
ASSERT(BytecodeIndex(m_bytecodeIndex.offset()) == m_bytecodeIndex);
JITInByIdGenerator& gen = m_inByIds[m_inByIdIndex++];
linkAllSlowCases(iter);
gen.reportBaselineDataICSlowPathBegin(label());
emitNakedNearCall(InlineCacheCompiler::generateSlowPathCode(vm(), gen.accessType()).retaggedCode<NoPtrTag>());
}
void JIT::emit_op_in_by_val(const JSInstruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpInByVal>();
VirtualRegister dst = bytecode.m_dst;
VirtualRegister base = bytecode.m_base;
VirtualRegister property = bytecode.m_property;
using BaselineJITRegisters::InByVal::baseJSR;
using BaselineJITRegisters::InByVal::propertyJSR;
using BaselineJITRegisters::InByVal::resultJSR;
using BaselineJITRegisters::InByVal::stubInfoGPR;
using BaselineJITRegisters::InByVal::profileGPR;
using BaselineJITRegisters::InByVal::scratch1GPR;
emitGetVirtualRegister(base, baseJSR);
emitGetVirtualRegister(property, propertyJSR);
auto [ stubInfo, stubInfoIndex ] = addUnlinkedStructureStubInfo();
loadStructureStubInfo(stubInfoIndex, stubInfoGPR);
materializePointerIntoMetadata(bytecode, OpInByVal::Metadata::offsetOfArrayProfile(), profileGPR);
emitJumpSlowCaseIfNotJSCell(baseJSR, base);
emitArrayProfilingSiteWithCellAndProfile(baseJSR.payloadGPR(), profileGPR, scratch1GPR);
JITInByValGenerator gen(
nullptr, stubInfo, JITType::BaselineJIT, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), AccessType::InByVal, RegisterSetBuilder::stubUnavailableRegisters(),
baseJSR, propertyJSR, resultJSR, profileGPR, stubInfoGPR);
gen.generateBaselineDataICFastPath(*this);
addSlowCase();
m_inByVals.append(gen);
setFastPathResumePoint();
emitPutVirtualRegister(dst, resultJSR);
}
void JIT::emitSlow_op_in_by_val(const JSInstruction*, Vector<SlowCaseEntry>::iterator& iter)
{
ASSERT(BytecodeIndex(m_bytecodeIndex.offset()) == m_bytecodeIndex);
JITInByValGenerator& gen = m_inByVals[m_inByValIndex++];
linkAllSlowCases(iter);
gen.reportBaselineDataICSlowPathBegin(label());
emitNakedNearCall(InlineCacheCompiler::generateSlowPathCode(vm(), gen.accessType()).retaggedCode<NoPtrTag>());
}
void JIT::emitHasPrivate(VirtualRegister dst, VirtualRegister base, VirtualRegister propertyOrBrand, AccessType type)
{
using BaselineJITRegisters::InByVal::baseJSR;
using BaselineJITRegisters::InByVal::propertyJSR;
using BaselineJITRegisters::InByVal::resultJSR;
using BaselineJITRegisters::InByVal::stubInfoGPR;
emitGetVirtualRegister(base, baseJSR);
emitGetVirtualRegister(propertyOrBrand, propertyJSR);
auto [ stubInfo, stubInfoIndex ] = addUnlinkedStructureStubInfo();
loadStructureStubInfo(stubInfoIndex, stubInfoGPR);
emitJumpSlowCaseIfNotJSCell(baseJSR, base);
JITInByValGenerator gen(
nullptr, stubInfo, JITType::BaselineJIT, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), type, RegisterSetBuilder::stubUnavailableRegisters(),
baseJSR, propertyJSR, resultJSR, InvalidGPRReg, stubInfoGPR);
gen.generateBaselineDataICFastPath(*this);
addSlowCase();
m_inByVals.append(gen);
setFastPathResumePoint();
emitPutVirtualRegister(dst, resultJSR);
}
void JIT::emitHasPrivateSlow(AccessType type, Vector<SlowCaseEntry>::iterator& iter)
{
ASSERT_UNUSED(type, type == AccessType::HasPrivateName || type == AccessType::HasPrivateBrand);
ASSERT(BytecodeIndex(m_bytecodeIndex.offset()) == m_bytecodeIndex);
JITInByValGenerator& gen = m_inByVals[m_inByValIndex++];
linkAllSlowCases(iter);
gen.reportBaselineDataICSlowPathBegin(label());
emitNakedNearCall(InlineCacheCompiler::generateSlowPathCode(vm(), gen.accessType()).retaggedCode<NoPtrTag>());
}
void JIT::emit_op_has_private_name(const JSInstruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpHasPrivateName>();
emitHasPrivate(bytecode.m_dst, bytecode.m_base, bytecode.m_property, AccessType::HasPrivateName);
}
void JIT::emitSlow_op_has_private_name(const JSInstruction*, Vector<SlowCaseEntry>::iterator& iter)
{
emitHasPrivateSlow(AccessType::HasPrivateName, iter);
}
void JIT::emit_op_has_private_brand(const JSInstruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpHasPrivateBrand>();
emitHasPrivate(bytecode.m_dst, bytecode.m_base, bytecode.m_brand, AccessType::HasPrivateBrand);
}
void JIT::emitSlow_op_has_private_brand(const JSInstruction*, Vector<SlowCaseEntry>::iterator& iter)
{
emitHasPrivateSlow(AccessType::HasPrivateBrand, iter);
}
void JIT::emit_op_resolve_scope(const JSInstruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpResolveScope>();
ResolveType profiledResolveType = bytecode.metadata(m_profiledCodeBlock).m_resolveType;
VirtualRegister dst = bytecode.m_dst;
VirtualRegister scope = bytecode.m_scope;
uint32_t bytecodeOffset = m_bytecodeIndex.offset();
ASSERT(BytecodeIndex(m_bytecodeIndex.offset()) == m_bytecodeIndex);
ASSERT(m_unlinkedCodeBlock->instructionAt(m_bytecodeIndex) == currentInstruction);
// If we profile certain resolve types, we're guaranteed all linked code will have the same
// resolve type.
if (profiledResolveType == ModuleVar)
loadPtrFromMetadata(bytecode, OpResolveScope::Metadata::offsetOfLexicalEnvironment(), returnValueGPR);
else {
uint32_t metadataOffset = m_profiledCodeBlock->metadataTable()->offsetInMetadataTable(bytecode);
using BaselineJITRegisters::ResolveScope::metadataGPR;
using BaselineJITRegisters::ResolveScope::scopeGPR;
using BaselineJITRegisters::ResolveScope::bytecodeOffsetGPR;
emitGetVirtualRegisterPayload(scope, scopeGPR);
addPtr(TrustedImm32(metadataOffset), s_metadataGPR, metadataGPR);
move(TrustedImm32(bytecodeOffset), bytecodeOffsetGPR);
MacroAssemblerCodeRef<JITThunkPtrTag> code;
if (profiledResolveType == ClosureVar)
code = vm().getCTIStub(generateOpResolveScopeThunk<ClosureVar>);
else if (profiledResolveType == ClosureVarWithVarInjectionChecks)
code = vm().getCTIStub(generateOpResolveScopeThunk<ClosureVarWithVarInjectionChecks>);
else if (profiledResolveType == GlobalVar)
code = vm().getCTIStub(generateOpResolveScopeThunk<GlobalVar>);
else if (profiledResolveType == GlobalProperty)
code = vm().getCTIStub(generateOpResolveScopeThunk<GlobalProperty>);
else if (profiledResolveType == GlobalLexicalVar)
code = vm().getCTIStub(generateOpResolveScopeThunk<GlobalLexicalVar>);
else if (profiledResolveType == GlobalVarWithVarInjectionChecks)
code = vm().getCTIStub(generateOpResolveScopeThunk<GlobalVarWithVarInjectionChecks>);
else if (profiledResolveType == GlobalPropertyWithVarInjectionChecks)
code = vm().getCTIStub(generateOpResolveScopeThunk<GlobalPropertyWithVarInjectionChecks>);
else if (profiledResolveType == GlobalLexicalVarWithVarInjectionChecks)
code = vm().getCTIStub(generateOpResolveScopeThunk<GlobalLexicalVarWithVarInjectionChecks>);
else
code = vm().getCTIStub(generateOpResolveScopeThunk<GlobalVar>);
emitNakedNearCall(code.retaggedCode<NoPtrTag>());
}
boxCell(returnValueGPR, returnValueJSR);
emitPutVirtualRegister(dst, returnValueJSR);
}
template <ResolveType profiledResolveType>
MacroAssemblerCodeRef<JITThunkPtrTag> JIT::generateOpResolveScopeThunk(VM& vm)
{
// The thunk generated by this function can only work with the LLInt / Baseline JIT because
// it makes assumptions about the right globalObject being available from CallFrame::codeBlock().
// DFG/FTL may inline functions belonging to other globalObjects, which may not match
// CallFrame::codeBlock().
CCallHelpers jit;
using Metadata = OpResolveScope::Metadata;
using BaselineJITRegisters::ResolveScope::metadataGPR; // Incoming
using BaselineJITRegisters::ResolveScope::scopeGPR; // Incoming
using BaselineJITRegisters::ResolveScope::bytecodeOffsetGPR; // Incoming - pass through to slow path.
constexpr GPRReg scratch1GPR = regT5; // local temporary
UNUSED_PARAM(bytecodeOffsetGPR);
static_assert(noOverlap(metadataGPR, scopeGPR, bytecodeOffsetGPR, scratch1GPR));
static_assert(scopeGPR == returnValueGPR); // emitResolveClosure assumes this
jit.tagReturnAddress();
JumpList slowCase;
auto doVarInjectionCheck = [&] (bool needsVarInjectionChecks, GPRReg globalObjectGPR = InvalidGPRReg) {
if (!needsVarInjectionChecks)
return;
if (globalObjectGPR == InvalidGPRReg) {
globalObjectGPR = scratch1GPR;
loadGlobalObject(jit, globalObjectGPR);
}
jit.loadPtr(Address(globalObjectGPR, JSGlobalObject::offsetOfVarInjectionWatchpoint()), scratch1GPR);
slowCase.append(jit.branch8(Equal, Address(scratch1GPR, WatchpointSet::offsetOfState()), TrustedImm32(IsInvalidated)));
};
auto emitResolveClosure = [&] (bool needsVarInjectionChecks) {
doVarInjectionCheck(needsVarInjectionChecks);
jit.load32(Address(metadataGPR, Metadata::offsetOfLocalScopeDepth()), scratch1GPR);
RELEASE_ASSERT(scopeGPR == returnValueGPR);
Label loop = jit.label();
Jump done = jit.branchTest32(Zero, scratch1GPR);
jit.loadPtr(Address(returnValueGPR, JSScope::offsetOfNext()), returnValueGPR);
jit.sub32(TrustedImm32(1), scratch1GPR);
jit.jump().linkTo(loop, &jit);
done.link(&jit);
};
auto emitCode = [&] (ResolveType resolveType) {
switch (resolveType) {
case GlobalProperty:
case GlobalPropertyWithVarInjectionChecks: {
// JSScope::constantScopeForCodeBlock() loads codeBlock->globalObject().
loadGlobalObject(jit, returnValueGPR);
doVarInjectionCheck(needsVarInjectionChecks(resolveType), returnValueGPR);
jit.load32(Address(metadataGPR, Metadata::offsetOfGlobalLexicalBindingEpoch()), scratch1GPR);
slowCase.append(jit.branch32(NotEqual, Address(returnValueGPR, JSGlobalObject::offsetOfGlobalLexicalBindingEpoch()), scratch1GPR));