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AccessCase.cpp
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1595 lines (1502 loc) · 54.2 KB
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/*
* Copyright (C) 2017-2022 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"
#include "AccessCase.h"
#if ENABLE(JIT)
#include "CCallHelpers.h"
#include "CacheableIdentifierInlines.h"
#include "CallLinkInfo.h"
#include "DirectArguments.h"
#include "GetterSetter.h"
#include "GetterSetterAccessCase.h"
#include "InlineCacheCompiler.h"
#include "InstanceOfAccessCase.h"
#include "IntrinsicGetterAccessCase.h"
#include "JSCInlines.h"
#include "JSModuleEnvironment.h"
#include "JSModuleNamespaceObject.h"
#include "LLIntThunks.h"
#include "LinkBuffer.h"
#include "ModuleNamespaceAccessCase.h"
#include "ProxyObjectAccessCase.h"
#include "ScopedArguments.h"
#include "ScratchRegisterAllocator.h"
#include "StructureStubInfo.h"
#include "SuperSampler.h"
#include "ThunkGenerators.h"
namespace JSC {
DEFINE_ALLOCATOR_WITH_HEAP_IDENTIFIER(AccessCase);
AccessCase::AccessCase(VM& vm, JSCell* owner, AccessType type, CacheableIdentifier identifier, PropertyOffset offset, Structure* structure, const ObjectPropertyConditionSet& conditionSet, RefPtr<PolyProtoAccessChain>&& prototypeAccessChain)
: m_type(type)
, m_offset(offset)
, m_polyProtoAccessChain(WTFMove(prototypeAccessChain))
, m_identifier(identifier)
{
m_structureID.setMayBeNull(vm, owner, structure);
m_conditionSet = conditionSet;
RELEASE_ASSERT(m_conditionSet.isValid());
}
Ref<AccessCase> AccessCase::create(VM& vm, JSCell* owner, AccessType type, CacheableIdentifier identifier, PropertyOffset offset, Structure* structure, const ObjectPropertyConditionSet& conditionSet, RefPtr<PolyProtoAccessChain>&& prototypeAccessChain)
{
switch (type) {
case LoadMegamorphic:
case StoreMegamorphic:
case InMegamorphic:
case InHit:
case InMiss:
case DeleteNonConfigurable:
case DeleteMiss:
break;
case ArrayLength:
case StringLength:
case DirectArgumentsLength:
case ScopedArgumentsLength:
case ModuleNamespaceLoad:
case ProxyObjectHas:
case ProxyObjectLoad:
case ProxyObjectStore:
case Replace:
case InstanceOfGeneric:
case IndexedProxyObjectLoad:
case IndexedMegamorphicLoad:
case IndexedMegamorphicStore:
case IndexedMegamorphicIn:
case IndexedInt32Load:
case IndexedDoubleLoad:
case IndexedContiguousLoad:
case IndexedArrayStorageLoad:
case IndexedScopedArgumentsLoad:
case IndexedDirectArgumentsLoad:
case IndexedTypedArrayInt8Load:
case IndexedTypedArrayUint8Load:
case IndexedTypedArrayUint8ClampedLoad:
case IndexedTypedArrayInt16Load:
case IndexedTypedArrayUint16Load:
case IndexedTypedArrayInt32Load:
case IndexedTypedArrayUint32Load:
case IndexedTypedArrayFloat32Load:
case IndexedTypedArrayFloat64Load:
case IndexedResizableTypedArrayInt8Load:
case IndexedResizableTypedArrayUint8Load:
case IndexedResizableTypedArrayUint8ClampedLoad:
case IndexedResizableTypedArrayInt16Load:
case IndexedResizableTypedArrayUint16Load:
case IndexedResizableTypedArrayInt32Load:
case IndexedResizableTypedArrayUint32Load:
case IndexedResizableTypedArrayFloat32Load:
case IndexedResizableTypedArrayFloat64Load:
case IndexedStringLoad:
case IndexedNoIndexingMiss:
case IndexedInt32Store:
case IndexedDoubleStore:
case IndexedContiguousStore:
case IndexedArrayStorageStore:
case IndexedTypedArrayInt8Store:
case IndexedTypedArrayUint8Store:
case IndexedTypedArrayUint8ClampedStore:
case IndexedTypedArrayInt16Store:
case IndexedTypedArrayUint16Store:
case IndexedTypedArrayInt32Store:
case IndexedTypedArrayUint32Store:
case IndexedTypedArrayFloat32Store:
case IndexedTypedArrayFloat64Store:
case IndexedResizableTypedArrayInt8Store:
case IndexedResizableTypedArrayUint8Store:
case IndexedResizableTypedArrayUint8ClampedStore:
case IndexedResizableTypedArrayInt16Store:
case IndexedResizableTypedArrayUint16Store:
case IndexedResizableTypedArrayInt32Store:
case IndexedResizableTypedArrayUint32Store:
case IndexedResizableTypedArrayFloat32Store:
case IndexedResizableTypedArrayFloat64Store:
case IndexedInt32InHit:
case IndexedDoubleInHit:
case IndexedContiguousInHit:
case IndexedArrayStorageInHit:
case IndexedScopedArgumentsInHit:
case IndexedDirectArgumentsInHit:
case IndexedTypedArrayInt8InHit:
case IndexedTypedArrayUint8InHit:
case IndexedTypedArrayUint8ClampedInHit:
case IndexedTypedArrayInt16InHit:
case IndexedTypedArrayUint16InHit:
case IndexedTypedArrayInt32InHit:
case IndexedTypedArrayUint32InHit:
case IndexedTypedArrayFloat32InHit:
case IndexedTypedArrayFloat64InHit:
case IndexedResizableTypedArrayInt8InHit:
case IndexedResizableTypedArrayUint8InHit:
case IndexedResizableTypedArrayUint8ClampedInHit:
case IndexedResizableTypedArrayInt16InHit:
case IndexedResizableTypedArrayUint16InHit:
case IndexedResizableTypedArrayInt32InHit:
case IndexedResizableTypedArrayUint32InHit:
case IndexedResizableTypedArrayFloat32InHit:
case IndexedResizableTypedArrayFloat64InHit:
case IndexedStringInHit:
case IndexedNoIndexingInMiss:
RELEASE_ASSERT(!prototypeAccessChain);
break;
case Load:
case Miss:
case Delete:
case Transition:
case GetGetter:
case Getter:
case Setter:
case CustomValueGetter:
case CustomValueSetter:
case CustomAccessorGetter:
case CustomAccessorSetter:
case IntrinsicGetter:
case InstanceOfHit:
case InstanceOfMiss:
case CheckPrivateBrand:
case SetPrivateBrand:
RELEASE_ASSERT_NOT_REACHED();
};
return adoptRef(*new AccessCase(vm, owner, type, identifier, offset, structure, conditionSet, WTFMove(prototypeAccessChain)));
}
RefPtr<AccessCase> AccessCase::createTransition(
VM& vm, JSCell* owner, CacheableIdentifier identifier, PropertyOffset offset, Structure* oldStructure, Structure* newStructure,
const ObjectPropertyConditionSet& conditionSet, RefPtr<PolyProtoAccessChain>&& prototypeAccessChain, const StructureStubInfo& stubInfo)
{
RELEASE_ASSERT(oldStructure == newStructure->previousID());
// Skip optimizing the case where we need a realloc, if we don't have
// enough registers to make it happen.
if (oldStructure->outOfLineCapacity() != newStructure->outOfLineCapacity()) {
// In 64 bits jsc uses 1 register for value, and it uses 2 registers in 32 bits
size_t requiredRegisters = 1; // stubInfo.valueRegs()
#if USE(JSVALUE32_64)
++requiredRegisters;
#endif
// 1 register for the property in 64 bits
++requiredRegisters;
#if USE(JSVALUE32_64)
// In 32 bits, jsc uses may use one extra register, if it is not a Cell
if (stubInfo.propertyRegs().tagGPR() != InvalidGPRReg)
++requiredRegisters;
#endif
// 1 register for the base in 64 bits
++requiredRegisters;
#if USE(JSVALUE32_64)
// In 32 bits, jsc uses may use one extra register, if it is not a Cell
if (stubInfo.baseRegs().tagGPR() != InvalidGPRReg)
++requiredRegisters;
#endif
if (stubInfo.m_stubInfoGPR != InvalidGPRReg)
++requiredRegisters;
if (stubInfo.m_arrayProfileGPR != InvalidGPRReg)
++requiredRegisters;
// One extra register for scratchGPR
++requiredRegisters;
// Check if we have enough registers when reallocating
if (oldStructure->outOfLineCapacity() && GPRInfo::numberOfRegisters < requiredRegisters)
return nullptr;
// If we are (re)allocating inline, jsc needs two extra scratchGPRs
if (!oldStructure->couldHaveIndexingHeader() && GPRInfo::numberOfRegisters < (requiredRegisters + 2))
return nullptr;
}
return adoptRef(*new AccessCase(vm, owner, Transition, identifier, offset, newStructure, conditionSet, WTFMove(prototypeAccessChain)));
}
Ref<AccessCase> AccessCase::createDelete(
VM& vm, JSCell* owner, CacheableIdentifier identifier, PropertyOffset offset, Structure* oldStructure, Structure* newStructure)
{
RELEASE_ASSERT(oldStructure == newStructure->previousID());
ASSERT(!newStructure->outOfLineCapacity() || oldStructure->outOfLineCapacity());
return adoptRef(*new AccessCase(vm, owner, Delete, identifier, offset, newStructure, { }, { }));
}
Ref<AccessCase> AccessCase::createCheckPrivateBrand(VM& vm, JSCell* owner, CacheableIdentifier identifier, Structure* structure)
{
return adoptRef(*new AccessCase(vm, owner, CheckPrivateBrand, identifier, invalidOffset, structure, { }, { }));
}
Ref<AccessCase> AccessCase::createSetPrivateBrand(
VM& vm, JSCell* owner, CacheableIdentifier identifier, Structure* oldStructure, Structure* newStructure)
{
RELEASE_ASSERT(oldStructure == newStructure->previousID());
return adoptRef(*new AccessCase(vm, owner, SetPrivateBrand, identifier, invalidOffset, newStructure, { }, { }));
}
Ref<AccessCase> AccessCase::createReplace(VM& vm, JSCell* owner, CacheableIdentifier identifier, PropertyOffset offset, Structure* oldStructure, bool viaGlobalProxy)
{
auto result = adoptRef(*new AccessCase(vm, owner, Replace, identifier, offset, oldStructure, { }, { }));
result->m_viaGlobalProxy = viaGlobalProxy;
return result;
}
RefPtr<AccessCase> AccessCase::fromStructureStubInfo(
VM& vm, JSCell* owner, CacheableIdentifier identifier, StructureStubInfo& stubInfo)
{
switch (stubInfo.cacheType()) {
case CacheType::GetByIdSelf:
RELEASE_ASSERT(stubInfo.hasConstantIdentifier);
return ProxyableAccessCase::create(vm, owner, Load, identifier, stubInfo.byIdSelfOffset, stubInfo.inlineAccessBaseStructure());
case CacheType::PutByIdReplace:
RELEASE_ASSERT(stubInfo.hasConstantIdentifier);
return AccessCase::createReplace(vm, owner, identifier, stubInfo.byIdSelfOffset, stubInfo.inlineAccessBaseStructure(), false);
case CacheType::InByIdSelf:
RELEASE_ASSERT(stubInfo.hasConstantIdentifier);
return AccessCase::create(vm, owner, InHit, identifier, stubInfo.byIdSelfOffset, stubInfo.inlineAccessBaseStructure());
case CacheType::ArrayLength:
RELEASE_ASSERT(stubInfo.hasConstantIdentifier);
return AccessCase::create(vm, owner, AccessCase::ArrayLength, CacheableIdentifier::createFromImmortalIdentifier(vm.propertyNames->length.impl()));
case CacheType::StringLength:
RELEASE_ASSERT(stubInfo.hasConstantIdentifier);
return AccessCase::create(vm, owner, AccessCase::StringLength, CacheableIdentifier::createFromImmortalIdentifier(vm.propertyNames->length.impl()));
default:
return nullptr;
}
}
JSObject* AccessCase::tryGetAlternateBaseImpl() const
{
switch (m_type) {
case AccessCase::Getter:
case AccessCase::Setter:
case AccessCase::CustomValueGetter:
case AccessCase::CustomAccessorGetter:
case AccessCase::CustomValueSetter:
case AccessCase::CustomAccessorSetter:
case AccessCase::IntrinsicGetter:
case AccessCase::Load:
case AccessCase::GetGetter:
if (!conditionSet().isEmpty())
return conditionSet().slotBaseCondition().object();
return nullptr;
default:
return nullptr;
}
}
bool AccessCase::guardedByStructureCheckSkippingConstantIdentifierCheck() const
{
if (viaGlobalProxy())
return false;
if (m_polyProtoAccessChain)
return false;
switch (m_type) {
case LoadMegamorphic:
case StoreMegamorphic:
case InMegamorphic:
case ArrayLength:
case StringLength:
case DirectArgumentsLength:
case ScopedArgumentsLength:
case ModuleNamespaceLoad:
case ProxyObjectHas:
case ProxyObjectLoad:
case ProxyObjectStore:
case InstanceOfHit:
case InstanceOfMiss:
case InstanceOfGeneric:
case IndexedProxyObjectLoad:
case IndexedMegamorphicLoad:
case IndexedMegamorphicStore:
case IndexedMegamorphicIn:
case IndexedInt32Load:
case IndexedDoubleLoad:
case IndexedContiguousLoad:
case IndexedArrayStorageLoad:
case IndexedScopedArgumentsLoad:
case IndexedDirectArgumentsLoad:
case IndexedTypedArrayInt8Load:
case IndexedTypedArrayUint8Load:
case IndexedTypedArrayUint8ClampedLoad:
case IndexedTypedArrayInt16Load:
case IndexedTypedArrayUint16Load:
case IndexedTypedArrayInt32Load:
case IndexedTypedArrayUint32Load:
case IndexedTypedArrayFloat32Load:
case IndexedTypedArrayFloat64Load:
case IndexedResizableTypedArrayInt8Load:
case IndexedResizableTypedArrayUint8Load:
case IndexedResizableTypedArrayUint8ClampedLoad:
case IndexedResizableTypedArrayInt16Load:
case IndexedResizableTypedArrayUint16Load:
case IndexedResizableTypedArrayInt32Load:
case IndexedResizableTypedArrayUint32Load:
case IndexedResizableTypedArrayFloat32Load:
case IndexedResizableTypedArrayFloat64Load:
case IndexedStringLoad:
case IndexedInt32Store:
case IndexedDoubleStore:
case IndexedContiguousStore:
case IndexedArrayStorageStore:
case IndexedTypedArrayInt8Store:
case IndexedTypedArrayUint8Store:
case IndexedTypedArrayUint8ClampedStore:
case IndexedTypedArrayInt16Store:
case IndexedTypedArrayUint16Store:
case IndexedTypedArrayInt32Store:
case IndexedTypedArrayUint32Store:
case IndexedTypedArrayFloat32Store:
case IndexedTypedArrayFloat64Store:
case IndexedResizableTypedArrayInt8Store:
case IndexedResizableTypedArrayUint8Store:
case IndexedResizableTypedArrayUint8ClampedStore:
case IndexedResizableTypedArrayInt16Store:
case IndexedResizableTypedArrayUint16Store:
case IndexedResizableTypedArrayInt32Store:
case IndexedResizableTypedArrayUint32Store:
case IndexedResizableTypedArrayFloat32Store:
case IndexedResizableTypedArrayFloat64Store:
case IndexedInt32InHit:
case IndexedDoubleInHit:
case IndexedContiguousInHit:
case IndexedArrayStorageInHit:
case IndexedScopedArgumentsInHit:
case IndexedDirectArgumentsInHit:
case IndexedTypedArrayInt8InHit:
case IndexedTypedArrayUint8InHit:
case IndexedTypedArrayUint8ClampedInHit:
case IndexedTypedArrayInt16InHit:
case IndexedTypedArrayUint16InHit:
case IndexedTypedArrayInt32InHit:
case IndexedTypedArrayUint32InHit:
case IndexedTypedArrayFloat32InHit:
case IndexedTypedArrayFloat64InHit:
case IndexedResizableTypedArrayInt8InHit:
case IndexedResizableTypedArrayUint8InHit:
case IndexedResizableTypedArrayUint8ClampedInHit:
case IndexedResizableTypedArrayInt16InHit:
case IndexedResizableTypedArrayUint16InHit:
case IndexedResizableTypedArrayInt32InHit:
case IndexedResizableTypedArrayUint32InHit:
case IndexedResizableTypedArrayFloat32InHit:
case IndexedResizableTypedArrayFloat64InHit:
case IndexedStringInHit:
return false;
case Load:
case Miss:
case Delete:
case DeleteNonConfigurable:
case DeleteMiss:
case Replace:
case IndexedNoIndexingMiss:
case IndexedNoIndexingInMiss:
case Transition:
case GetGetter:
case Getter:
case Setter:
case CustomValueGetter:
case CustomValueSetter:
case CustomAccessorGetter:
case CustomAccessorSetter:
case InHit:
case InMiss:
case IntrinsicGetter:
case CheckPrivateBrand:
case SetPrivateBrand:
return true;
}
RELEASE_ASSERT_NOT_REACHED();
}
bool AccessCase::requiresIdentifierNameMatch() const
{
switch (m_type) {
case Load:
case LoadMegamorphic:
case StoreMegamorphic:
case InMegamorphic:
// We don't currently have a by_val for these puts, but we do care about the identifier.
case Transition:
case Delete:
case DeleteNonConfigurable:
case DeleteMiss:
case Replace:
case Miss:
case GetGetter:
case Getter:
case Setter:
case CustomValueGetter:
case CustomAccessorGetter:
case CustomValueSetter:
case CustomAccessorSetter:
case IntrinsicGetter:
case InHit:
case InMiss:
case ArrayLength:
case StringLength:
case DirectArgumentsLength:
case ScopedArgumentsLength:
case ModuleNamespaceLoad:
case ProxyObjectHas:
case ProxyObjectLoad:
case ProxyObjectStore:
case CheckPrivateBrand:
case SetPrivateBrand:
return true;
case InstanceOfHit:
case InstanceOfMiss:
case InstanceOfGeneric:
case IndexedProxyObjectLoad:
case IndexedMegamorphicLoad:
case IndexedMegamorphicStore:
case IndexedMegamorphicIn:
case IndexedInt32Load:
case IndexedDoubleLoad:
case IndexedContiguousLoad:
case IndexedArrayStorageLoad:
case IndexedScopedArgumentsLoad:
case IndexedDirectArgumentsLoad:
case IndexedTypedArrayInt8Load:
case IndexedTypedArrayUint8Load:
case IndexedTypedArrayUint8ClampedLoad:
case IndexedTypedArrayInt16Load:
case IndexedTypedArrayUint16Load:
case IndexedTypedArrayInt32Load:
case IndexedTypedArrayUint32Load:
case IndexedTypedArrayFloat32Load:
case IndexedTypedArrayFloat64Load:
case IndexedResizableTypedArrayInt8Load:
case IndexedResizableTypedArrayUint8Load:
case IndexedResizableTypedArrayUint8ClampedLoad:
case IndexedResizableTypedArrayInt16Load:
case IndexedResizableTypedArrayUint16Load:
case IndexedResizableTypedArrayInt32Load:
case IndexedResizableTypedArrayUint32Load:
case IndexedResizableTypedArrayFloat32Load:
case IndexedResizableTypedArrayFloat64Load:
case IndexedStringLoad:
case IndexedNoIndexingMiss:
case IndexedInt32Store:
case IndexedDoubleStore:
case IndexedContiguousStore:
case IndexedArrayStorageStore:
case IndexedTypedArrayInt8Store:
case IndexedTypedArrayUint8Store:
case IndexedTypedArrayUint8ClampedStore:
case IndexedTypedArrayInt16Store:
case IndexedTypedArrayUint16Store:
case IndexedTypedArrayInt32Store:
case IndexedTypedArrayUint32Store:
case IndexedTypedArrayFloat32Store:
case IndexedTypedArrayFloat64Store:
case IndexedResizableTypedArrayInt8Store:
case IndexedResizableTypedArrayUint8Store:
case IndexedResizableTypedArrayUint8ClampedStore:
case IndexedResizableTypedArrayInt16Store:
case IndexedResizableTypedArrayUint16Store:
case IndexedResizableTypedArrayInt32Store:
case IndexedResizableTypedArrayUint32Store:
case IndexedResizableTypedArrayFloat32Store:
case IndexedResizableTypedArrayFloat64Store:
case IndexedInt32InHit:
case IndexedDoubleInHit:
case IndexedContiguousInHit:
case IndexedArrayStorageInHit:
case IndexedScopedArgumentsInHit:
case IndexedDirectArgumentsInHit:
case IndexedTypedArrayInt8InHit:
case IndexedTypedArrayUint8InHit:
case IndexedTypedArrayUint8ClampedInHit:
case IndexedTypedArrayInt16InHit:
case IndexedTypedArrayUint16InHit:
case IndexedTypedArrayInt32InHit:
case IndexedTypedArrayUint32InHit:
case IndexedTypedArrayFloat32InHit:
case IndexedTypedArrayFloat64InHit:
case IndexedResizableTypedArrayInt8InHit:
case IndexedResizableTypedArrayUint8InHit:
case IndexedResizableTypedArrayUint8ClampedInHit:
case IndexedResizableTypedArrayInt16InHit:
case IndexedResizableTypedArrayUint16InHit:
case IndexedResizableTypedArrayInt32InHit:
case IndexedResizableTypedArrayUint32InHit:
case IndexedResizableTypedArrayFloat32InHit:
case IndexedResizableTypedArrayFloat64InHit:
case IndexedStringInHit:
case IndexedNoIndexingInMiss:
return false;
}
RELEASE_ASSERT_NOT_REACHED();
}
bool AccessCase::requiresInt32PropertyCheck() const
{
switch (m_type) {
case Load:
case LoadMegamorphic:
case StoreMegamorphic:
case InMegamorphic:
case Transition:
case Delete:
case DeleteNonConfigurable:
case DeleteMiss:
case Replace:
case Miss:
case GetGetter:
case Getter:
case Setter:
case CustomValueGetter:
case CustomAccessorGetter:
case CustomValueSetter:
case CustomAccessorSetter:
case IntrinsicGetter:
case InHit:
case InMiss:
case ArrayLength:
case StringLength:
case DirectArgumentsLength:
case ScopedArgumentsLength:
case ModuleNamespaceLoad:
case ProxyObjectHas:
case ProxyObjectLoad:
case ProxyObjectStore:
case InstanceOfHit:
case InstanceOfMiss:
case InstanceOfGeneric:
case CheckPrivateBrand:
case SetPrivateBrand:
case IndexedProxyObjectLoad:
case IndexedMegamorphicLoad:
case IndexedMegamorphicStore:
case IndexedMegamorphicIn:
return false;
case IndexedInt32Load:
case IndexedDoubleLoad:
case IndexedContiguousLoad:
case IndexedArrayStorageLoad:
case IndexedScopedArgumentsLoad:
case IndexedDirectArgumentsLoad:
case IndexedTypedArrayInt8Load:
case IndexedTypedArrayUint8Load:
case IndexedTypedArrayUint8ClampedLoad:
case IndexedTypedArrayInt16Load:
case IndexedTypedArrayUint16Load:
case IndexedTypedArrayInt32Load:
case IndexedTypedArrayUint32Load:
case IndexedTypedArrayFloat32Load:
case IndexedTypedArrayFloat64Load:
case IndexedResizableTypedArrayInt8Load:
case IndexedResizableTypedArrayUint8Load:
case IndexedResizableTypedArrayUint8ClampedLoad:
case IndexedResizableTypedArrayInt16Load:
case IndexedResizableTypedArrayUint16Load:
case IndexedResizableTypedArrayInt32Load:
case IndexedResizableTypedArrayUint32Load:
case IndexedResizableTypedArrayFloat32Load:
case IndexedResizableTypedArrayFloat64Load:
case IndexedStringLoad:
case IndexedNoIndexingMiss:
case IndexedInt32Store:
case IndexedDoubleStore:
case IndexedContiguousStore:
case IndexedArrayStorageStore:
case IndexedTypedArrayInt8Store:
case IndexedTypedArrayUint8Store:
case IndexedTypedArrayUint8ClampedStore:
case IndexedTypedArrayInt16Store:
case IndexedTypedArrayUint16Store:
case IndexedTypedArrayInt32Store:
case IndexedTypedArrayUint32Store:
case IndexedTypedArrayFloat32Store:
case IndexedTypedArrayFloat64Store:
case IndexedResizableTypedArrayInt8Store:
case IndexedResizableTypedArrayUint8Store:
case IndexedResizableTypedArrayUint8ClampedStore:
case IndexedResizableTypedArrayInt16Store:
case IndexedResizableTypedArrayUint16Store:
case IndexedResizableTypedArrayInt32Store:
case IndexedResizableTypedArrayUint32Store:
case IndexedResizableTypedArrayFloat32Store:
case IndexedResizableTypedArrayFloat64Store:
case IndexedInt32InHit:
case IndexedDoubleInHit:
case IndexedContiguousInHit:
case IndexedArrayStorageInHit:
case IndexedScopedArgumentsInHit:
case IndexedDirectArgumentsInHit:
case IndexedTypedArrayInt8InHit:
case IndexedTypedArrayUint8InHit:
case IndexedTypedArrayUint8ClampedInHit:
case IndexedTypedArrayInt16InHit:
case IndexedTypedArrayUint16InHit:
case IndexedTypedArrayInt32InHit:
case IndexedTypedArrayUint32InHit:
case IndexedTypedArrayFloat32InHit:
case IndexedTypedArrayFloat64InHit:
case IndexedResizableTypedArrayInt8InHit:
case IndexedResizableTypedArrayUint8InHit:
case IndexedResizableTypedArrayUint8ClampedInHit:
case IndexedResizableTypedArrayInt16InHit:
case IndexedResizableTypedArrayUint16InHit:
case IndexedResizableTypedArrayInt32InHit:
case IndexedResizableTypedArrayUint32InHit:
case IndexedResizableTypedArrayFloat32InHit:
case IndexedResizableTypedArrayFloat64InHit:
case IndexedStringInHit:
case IndexedNoIndexingInMiss:
return true;
}
RELEASE_ASSERT_NOT_REACHED();
}
template<typename Functor>
void AccessCase::forEachDependentCell(VM&, const Functor& functor) const
{
m_conditionSet.forEachDependentCell(functor);
if (m_structureID)
functor(m_structureID.get());
if (m_polyProtoAccessChain) {
for (StructureID structureID : m_polyProtoAccessChain->chain())
functor(structureID.decode());
}
switch (type()) {
case Getter:
case Setter: {
break;
}
case CustomValueGetter:
case CustomValueSetter: {
auto& accessor = this->as<GetterSetterAccessCase>();
if (accessor.customSlotBase())
functor(accessor.customSlotBase());
break;
}
case IntrinsicGetter: {
auto& intrinsic = this->as<IntrinsicGetterAccessCase>();
if (intrinsic.intrinsicFunction())
functor(intrinsic.intrinsicFunction());
break;
}
case ModuleNamespaceLoad: {
auto& accessCase = this->as<ModuleNamespaceAccessCase>();
if (accessCase.moduleNamespaceObject())
functor(accessCase.moduleNamespaceObject());
if (accessCase.moduleEnvironment())
functor(accessCase.moduleEnvironment());
break;
}
case ProxyObjectHas:
case ProxyObjectLoad:
case ProxyObjectStore:
case IndexedProxyObjectLoad: {
break;
}
case InstanceOfHit:
case InstanceOfMiss:
if (as<InstanceOfAccessCase>().prototype())
functor(as<InstanceOfAccessCase>().prototype());
break;
case CustomAccessorGetter:
case CustomAccessorSetter:
case Load:
case LoadMegamorphic:
case StoreMegamorphic:
case InMegamorphic:
case Transition:
case Delete:
case DeleteNonConfigurable:
case DeleteMiss:
case Replace:
case Miss:
case GetGetter:
case InHit:
case InMiss:
case CheckPrivateBrand:
case SetPrivateBrand:
case ArrayLength:
case StringLength:
case DirectArgumentsLength:
case ScopedArgumentsLength:
case InstanceOfGeneric:
case IndexedMegamorphicLoad:
case IndexedMegamorphicStore:
case IndexedMegamorphicIn:
case IndexedInt32Load:
case IndexedDoubleLoad:
case IndexedContiguousLoad:
case IndexedArrayStorageLoad:
case IndexedScopedArgumentsLoad:
case IndexedDirectArgumentsLoad:
case IndexedTypedArrayInt8Load:
case IndexedTypedArrayUint8Load:
case IndexedTypedArrayUint8ClampedLoad:
case IndexedTypedArrayInt16Load:
case IndexedTypedArrayUint16Load:
case IndexedTypedArrayInt32Load:
case IndexedTypedArrayUint32Load:
case IndexedTypedArrayFloat32Load:
case IndexedTypedArrayFloat64Load:
case IndexedResizableTypedArrayInt8Load:
case IndexedResizableTypedArrayUint8Load:
case IndexedResizableTypedArrayUint8ClampedLoad:
case IndexedResizableTypedArrayInt16Load:
case IndexedResizableTypedArrayUint16Load:
case IndexedResizableTypedArrayInt32Load:
case IndexedResizableTypedArrayUint32Load:
case IndexedResizableTypedArrayFloat32Load:
case IndexedResizableTypedArrayFloat64Load:
case IndexedStringLoad:
case IndexedNoIndexingMiss:
case IndexedInt32Store:
case IndexedDoubleStore:
case IndexedContiguousStore:
case IndexedArrayStorageStore:
case IndexedTypedArrayInt8Store:
case IndexedTypedArrayUint8Store:
case IndexedTypedArrayUint8ClampedStore:
case IndexedTypedArrayInt16Store:
case IndexedTypedArrayUint16Store:
case IndexedTypedArrayInt32Store:
case IndexedTypedArrayUint32Store:
case IndexedTypedArrayFloat32Store:
case IndexedTypedArrayFloat64Store:
case IndexedResizableTypedArrayInt8Store:
case IndexedResizableTypedArrayUint8Store:
case IndexedResizableTypedArrayUint8ClampedStore:
case IndexedResizableTypedArrayInt16Store:
case IndexedResizableTypedArrayUint16Store:
case IndexedResizableTypedArrayInt32Store:
case IndexedResizableTypedArrayUint32Store:
case IndexedResizableTypedArrayFloat32Store:
case IndexedResizableTypedArrayFloat64Store:
case IndexedInt32InHit:
case IndexedDoubleInHit:
case IndexedContiguousInHit:
case IndexedArrayStorageInHit:
case IndexedScopedArgumentsInHit:
case IndexedDirectArgumentsInHit:
case IndexedTypedArrayInt8InHit:
case IndexedTypedArrayUint8InHit:
case IndexedTypedArrayUint8ClampedInHit:
case IndexedTypedArrayInt16InHit:
case IndexedTypedArrayUint16InHit:
case IndexedTypedArrayInt32InHit:
case IndexedTypedArrayUint32InHit:
case IndexedTypedArrayFloat32InHit:
case IndexedTypedArrayFloat64InHit:
case IndexedResizableTypedArrayInt8InHit:
case IndexedResizableTypedArrayUint8InHit:
case IndexedResizableTypedArrayUint8ClampedInHit:
case IndexedResizableTypedArrayInt16InHit:
case IndexedResizableTypedArrayUint16InHit:
case IndexedResizableTypedArrayInt32InHit:
case IndexedResizableTypedArrayUint32InHit:
case IndexedResizableTypedArrayFloat32InHit:
case IndexedResizableTypedArrayFloat64InHit:
case IndexedStringInHit:
case IndexedNoIndexingInMiss:
break;
}
}
bool AccessCase::doesCalls(VM&) const
{
bool doesCalls = false;
switch (type()) {
case Transition:
doesCalls = newStructure()->outOfLineCapacity() != structure()->outOfLineCapacity() && structure()->couldHaveIndexingHeader();
break;
case Getter:
case Setter:
case CustomValueGetter:
case CustomAccessorGetter:
case CustomValueSetter:
case CustomAccessorSetter:
case ProxyObjectHas:
case ProxyObjectLoad:
case ProxyObjectStore:
case IndexedProxyObjectLoad:
case StoreMegamorphic:
case IndexedMegamorphicStore:
doesCalls = true;
break;
case IntrinsicGetter: {
doesCalls = this->as<IntrinsicGetterAccessCase>().doesCalls();
break;
}
case Delete:
case DeleteNonConfigurable:
case DeleteMiss:
case Load:
case LoadMegamorphic:
case InMegamorphic:
case Miss:
case GetGetter:
case InHit:
case InMiss:
case CheckPrivateBrand:
case SetPrivateBrand:
case ArrayLength:
case StringLength:
case DirectArgumentsLength:
case ScopedArgumentsLength:
case ModuleNamespaceLoad:
case InstanceOfHit:
case InstanceOfMiss:
case InstanceOfGeneric:
case IndexedMegamorphicLoad:
case IndexedMegamorphicIn:
case IndexedInt32Load:
case IndexedDoubleLoad:
case IndexedContiguousLoad:
case IndexedArrayStorageLoad:
case IndexedScopedArgumentsLoad:
case IndexedDirectArgumentsLoad:
case IndexedTypedArrayInt8Load:
case IndexedTypedArrayUint8Load:
case IndexedTypedArrayUint8ClampedLoad:
case IndexedTypedArrayInt16Load:
case IndexedTypedArrayUint16Load:
case IndexedTypedArrayInt32Load:
case IndexedTypedArrayUint32Load:
case IndexedTypedArrayFloat32Load:
case IndexedTypedArrayFloat64Load:
case IndexedResizableTypedArrayInt8Load:
case IndexedResizableTypedArrayUint8Load:
case IndexedResizableTypedArrayUint8ClampedLoad:
case IndexedResizableTypedArrayInt16Load:
case IndexedResizableTypedArrayUint16Load:
case IndexedResizableTypedArrayInt32Load:
case IndexedResizableTypedArrayUint32Load:
case IndexedResizableTypedArrayFloat32Load:
case IndexedResizableTypedArrayFloat64Load:
case IndexedStringLoad:
case IndexedNoIndexingMiss:
case IndexedInt32Store:
case IndexedDoubleStore:
case IndexedContiguousStore:
case IndexedArrayStorageStore:
case IndexedTypedArrayInt8Store:
case IndexedTypedArrayUint8Store:
case IndexedTypedArrayUint8ClampedStore:
case IndexedTypedArrayInt16Store:
case IndexedTypedArrayUint16Store:
case IndexedTypedArrayInt32Store:
case IndexedTypedArrayUint32Store:
case IndexedTypedArrayFloat32Store:
case IndexedTypedArrayFloat64Store:
case IndexedResizableTypedArrayInt8Store:
case IndexedResizableTypedArrayUint8Store:
case IndexedResizableTypedArrayUint8ClampedStore:
case IndexedResizableTypedArrayInt16Store:
case IndexedResizableTypedArrayUint16Store:
case IndexedResizableTypedArrayInt32Store:
case IndexedResizableTypedArrayUint32Store:
case IndexedResizableTypedArrayFloat32Store:
case IndexedResizableTypedArrayFloat64Store:
case IndexedInt32InHit:
case IndexedDoubleInHit:
case IndexedContiguousInHit:
case IndexedArrayStorageInHit:
case IndexedScopedArgumentsInHit:
case IndexedDirectArgumentsInHit:
case IndexedTypedArrayInt8InHit:
case IndexedTypedArrayUint8InHit:
case IndexedTypedArrayUint8ClampedInHit:
case IndexedTypedArrayInt16InHit:
case IndexedTypedArrayUint16InHit:
case IndexedTypedArrayInt32InHit:
case IndexedTypedArrayUint32InHit:
case IndexedTypedArrayFloat32InHit:
case IndexedTypedArrayFloat64InHit:
case IndexedResizableTypedArrayInt8InHit:
case IndexedResizableTypedArrayUint8InHit:
case IndexedResizableTypedArrayUint8ClampedInHit:
case IndexedResizableTypedArrayInt16InHit:
case IndexedResizableTypedArrayUint16InHit:
case IndexedResizableTypedArrayInt32InHit:
case IndexedResizableTypedArrayUint32InHit:
case IndexedResizableTypedArrayFloat32InHit:
case IndexedResizableTypedArrayFloat64InHit:
case IndexedStringInHit:
case IndexedNoIndexingInMiss:
doesCalls = false;
break;
case Replace:
doesCalls = viaGlobalProxy();
break;
}
return doesCalls;
}
bool AccessCase::couldStillSucceed() const
{
for (const ObjectPropertyCondition& condition : m_conditionSet) {
if (condition.condition().kind() == PropertyCondition::Equivalence) {
if (!condition.isWatchableAssumingImpurePropertyWatchpoint(PropertyCondition::WatchabilityEffort::EnsureWatchability, Concurrency::MainThread))
return false;
} else {
if (!condition.structureEnsuresValidityAssumingImpurePropertyWatchpoint(Concurrency::MainThread))
return false;
}
}
return true;
}
bool AccessCase::canReplace(const AccessCase& other) const
{
// This puts in a good effort to try to figure out if 'other' is made superfluous by '*this'.
// It's fine for this to return false if it's in doubt.
//
// Note that if A->guardedByStructureCheck() && B->guardedByStructureCheck() then
// A->canReplace(B) == B->canReplace(A).
if (m_identifier != other.m_identifier)
return false;
if (viaGlobalProxy() != other.viaGlobalProxy())
return false;
auto checkPolyProtoAndStructure = [&] {
if (m_polyProtoAccessChain) {
if (!other.m_polyProtoAccessChain)
return false;
// This is the only check we need since PolyProtoAccessChain contains the base structure.
// If we ever change it to contain only the prototype chain, we'll also need to change
// this to check the base structure.