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JITOperations.cpp
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3426 lines (2791 loc) · 152 KB
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/*
* Copyright (C) 2013-2020 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 "JITOperations.h"
#if ENABLE(JIT)
#include "ArithProfile.h"
#include "ArrayConstructor.h"
#include "CacheableIdentifierInlines.h"
#include "CommonSlowPathsInlines.h"
#include "DFGCompilationMode.h"
#include "DFGDriver.h"
#include "DFGOSREntry.h"
#include "DFGThunks.h"
#include "DFGWorklist.h"
#include "Debugger.h"
#include "ExceptionFuzz.h"
#include "FrameTracers.h"
#include "GetterSetter.h"
#include "ICStats.h"
#include "Interpreter.h"
#include "JIT.h"
#include "JITExceptions.h"
#include "JITToDFGDeferredCompilationCallback.h"
#include "JSAsyncFunction.h"
#include "JSAsyncGenerator.h"
#include "JSAsyncGeneratorFunction.h"
#include "JSCInlines.h"
#include "JSCPtrTag.h"
#include "JSGeneratorFunction.h"
#include "JSGlobalObjectFunctions.h"
#include "JSInternalPromise.h"
#include "JSLexicalEnvironment.h"
#include "JSWithScope.h"
#include "LLIntEntrypoint.h"
#include "ObjectConstructor.h"
#include "PropertyName.h"
#include "RegExpObject.h"
#include "Repatch.h"
#include "ShadowChicken.h"
#include "StructureStubInfo.h"
#include "SuperSampler.h"
#include "ThunkGenerators.h"
#include "TypeProfilerLog.h"
#include "VMInlines.h"
IGNORE_WARNINGS_BEGIN("frame-address")
namespace JSC {
ALWAYS_INLINE JSValue profiledAdd(JSGlobalObject* globalObject, JSValue op1, JSValue op2, BinaryArithProfile& arithProfile)
{
arithProfile.observeLHSAndRHS(op1, op2);
JSValue result = jsAdd(globalObject, op1, op2);
arithProfile.observeResult(result);
return result;
}
#if COMPILER(MSVC)
extern "C" void * _ReturnAddress(void);
#pragma intrinsic(_ReturnAddress)
#define OUR_RETURN_ADDRESS _ReturnAddress()
#else
#define OUR_RETURN_ADDRESS __builtin_return_address(0)
#endif
#if ENABLE(OPCODE_SAMPLING)
#define CTI_SAMPLER vm.interpreter->sampler()
#else
#define CTI_SAMPLER 0
#endif
JSC_DEFINE_JIT_OPERATION(operationThrowStackOverflowError, void, (CodeBlock* codeBlock))
{
// We pass in our own code block, because the callframe hasn't been populated.
VM& vm = codeBlock->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
auto scope = DECLARE_THROW_SCOPE(vm);
callFrame->convertToStackOverflowFrame(vm, codeBlock);
throwStackOverflowError(codeBlock->globalObject(), scope);
}
JSC_DEFINE_JIT_OPERATION(operationThrowStackOverflowErrorFromThunk, void, (JSGlobalObject* globalObject))
{
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
auto scope = DECLARE_THROW_SCOPE(vm);
throwStackOverflowError(globalObject, scope);
genericUnwind(vm, callFrame);
ASSERT(vm.targetMachinePCForThrow);
}
JSC_DEFINE_JIT_OPERATION(operationThrowIteratorResultIsNotObject, void, (JSGlobalObject* globalObject))
{
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
auto scope = DECLARE_THROW_SCOPE(vm);
throwTypeError(globalObject, scope, "Iterator result interface is not an object."_s);
}
JSC_DEFINE_JIT_OPERATION(operationCallArityCheck, int32_t, (JSGlobalObject* globalObject))
{
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
auto scope = DECLARE_THROW_SCOPE(vm);
int32_t missingArgCount = CommonSlowPaths::arityCheckFor(vm, callFrame, CodeForCall);
if (UNLIKELY(missingArgCount < 0)) {
CodeBlock* codeBlock = CommonSlowPaths::codeBlockFromCallFrameCallee(callFrame, CodeForCall);
callFrame->convertToStackOverflowFrame(vm, codeBlock);
throwStackOverflowError(globalObject, scope);
}
return missingArgCount;
}
JSC_DEFINE_JIT_OPERATION(operationConstructArityCheck, int32_t, (JSGlobalObject* globalObject))
{
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
auto scope = DECLARE_THROW_SCOPE(vm);
int32_t missingArgCount = CommonSlowPaths::arityCheckFor(vm, callFrame, CodeForConstruct);
if (UNLIKELY(missingArgCount < 0)) {
CodeBlock* codeBlock = CommonSlowPaths::codeBlockFromCallFrameCallee(callFrame, CodeForConstruct);
callFrame->convertToStackOverflowFrame(vm, codeBlock);
throwStackOverflowError(globalObject, scope);
}
return missingArgCount;
}
JSC_DEFINE_JIT_OPERATION(operationTryGetById, EncodedJSValue, (JSGlobalObject* globalObject, StructureStubInfo* stubInfo, EncodedJSValue base, uintptr_t rawCacheableIdentifier))
{
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
CacheableIdentifier identifier = CacheableIdentifier::createFromRawBits(rawCacheableIdentifier);
Identifier ident = Identifier::fromUid(vm, identifier.uid());
stubInfo->tookSlowPath = true;
JSValue baseValue = JSValue::decode(base);
PropertySlot slot(baseValue, PropertySlot::InternalMethodType::VMInquiry, &vm);
baseValue.getPropertySlot(globalObject, ident, slot);
return JSValue::encode(slot.getPureResult());
}
JSC_DEFINE_JIT_OPERATION(operationTryGetByIdGeneric, EncodedJSValue, (JSGlobalObject* globalObject, EncodedJSValue base, uintptr_t rawCacheableIdentifier))
{
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
CacheableIdentifier identifier = CacheableIdentifier::createFromRawBits(rawCacheableIdentifier);
Identifier ident = Identifier::fromUid(vm, identifier.uid());
JSValue baseValue = JSValue::decode(base);
PropertySlot slot(baseValue, PropertySlot::InternalMethodType::VMInquiry, &vm);
baseValue.getPropertySlot(globalObject, ident, slot);
return JSValue::encode(slot.getPureResult());
}
JSC_DEFINE_JIT_OPERATION(operationTryGetByIdOptimize, EncodedJSValue, (JSGlobalObject* globalObject, StructureStubInfo* stubInfo, EncodedJSValue base, uintptr_t rawCacheableIdentifier))
{
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
auto scope = DECLARE_THROW_SCOPE(vm);
CacheableIdentifier identifier = CacheableIdentifier::createFromRawBits(rawCacheableIdentifier);
Identifier ident = Identifier::fromUid(vm, identifier.uid());
JSValue baseValue = JSValue::decode(base);
PropertySlot slot(baseValue, PropertySlot::InternalMethodType::VMInquiry, &vm);
baseValue.getPropertySlot(globalObject, ident, slot);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
CodeBlock* codeBlock = callFrame->codeBlock();
if (stubInfo->considerCachingBy(vm, codeBlock, baseValue.structureOrNull(vm), identifier) && !slot.isTaintedByOpaqueObject() && (slot.isCacheableValue() || slot.isCacheableGetter() || slot.isUnset()))
repatchGetBy(globalObject, codeBlock, baseValue, identifier, slot, *stubInfo, GetByKind::Try);
return JSValue::encode(slot.getPureResult());
}
JSC_DEFINE_JIT_OPERATION(operationGetByIdDirect, EncodedJSValue, (JSGlobalObject* globalObject, StructureStubInfo* stubInfo, EncodedJSValue base, uintptr_t rawCacheableIdentifier))
{
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
auto scope = DECLARE_THROW_SCOPE(vm);
CacheableIdentifier identifier = CacheableIdentifier::createFromRawBits(rawCacheableIdentifier);
Identifier ident = Identifier::fromUid(vm, identifier.uid());
stubInfo->tookSlowPath = true;
JSValue baseValue = JSValue::decode(base);
PropertySlot slot(baseValue, PropertySlot::InternalMethodType::GetOwnProperty);
bool found = baseValue.getOwnPropertySlot(globalObject, ident, slot);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
RELEASE_AND_RETURN(scope, JSValue::encode(found ? slot.getValue(globalObject, ident) : jsUndefined()));
}
JSC_DEFINE_JIT_OPERATION(operationGetByIdDirectGeneric, EncodedJSValue, (JSGlobalObject* globalObject, EncodedJSValue base, uintptr_t rawCacheableIdentifier))
{
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
auto scope = DECLARE_THROW_SCOPE(vm);
CacheableIdentifier identifier = CacheableIdentifier::createFromRawBits(rawCacheableIdentifier);
Identifier ident = Identifier::fromUid(vm, identifier.uid());
JSValue baseValue = JSValue::decode(base);
PropertySlot slot(baseValue, PropertySlot::InternalMethodType::GetOwnProperty);
bool found = baseValue.getOwnPropertySlot(globalObject, ident, slot);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
RELEASE_AND_RETURN(scope, JSValue::encode(found ? slot.getValue(globalObject, ident) : jsUndefined()));
}
JSC_DEFINE_JIT_OPERATION(operationGetByIdDirectOptimize, EncodedJSValue, (JSGlobalObject* globalObject, StructureStubInfo* stubInfo, EncodedJSValue base, uintptr_t rawCacheableIdentifier))
{
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
auto scope = DECLARE_THROW_SCOPE(vm);
CacheableIdentifier identifier = CacheableIdentifier::createFromRawBits(rawCacheableIdentifier);
Identifier ident = Identifier::fromUid(vm, identifier.uid());
JSValue baseValue = JSValue::decode(base);
PropertySlot slot(baseValue, PropertySlot::InternalMethodType::GetOwnProperty);
bool found = baseValue.getOwnPropertySlot(globalObject, ident, slot);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
CodeBlock* codeBlock = callFrame->codeBlock();
if (stubInfo->considerCachingBy(vm, codeBlock, baseValue.structureOrNull(vm), identifier))
repatchGetBy(globalObject, codeBlock, baseValue, identifier, slot, *stubInfo, GetByKind::Direct);
RELEASE_AND_RETURN(scope, JSValue::encode(found ? slot.getValue(globalObject, ident) : jsUndefined()));
}
JSC_DEFINE_JIT_OPERATION(operationGetById, EncodedJSValue, (JSGlobalObject* globalObject, StructureStubInfo* stubInfo, EncodedJSValue base, uintptr_t rawCacheableIdentifier))
{
SuperSamplerScope superSamplerScope(false);
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
stubInfo->tookSlowPath = true;
JSValue baseValue = JSValue::decode(base);
PropertySlot slot(baseValue, PropertySlot::InternalMethodType::Get);
CacheableIdentifier identifier = CacheableIdentifier::createFromRawBits(rawCacheableIdentifier);
Identifier ident = Identifier::fromUid(vm, identifier.uid());
JSValue result = baseValue.get(globalObject, ident, slot);
LOG_IC((ICEvent::OperationGetById, baseValue.classInfoOrNull(vm), ident, baseValue == slot.slotBase()));
return JSValue::encode(result);
}
JSC_DEFINE_JIT_OPERATION(operationGetByIdGeneric, EncodedJSValue, (JSGlobalObject* globalObject, EncodedJSValue base, uintptr_t rawCacheableIdentifier))
{
SuperSamplerScope superSamplerScope(false);
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
JSValue baseValue = JSValue::decode(base);
PropertySlot slot(baseValue, PropertySlot::InternalMethodType::Get);
CacheableIdentifier identifier = CacheableIdentifier::createFromRawBits(rawCacheableIdentifier);
Identifier ident = Identifier::fromUid(vm, identifier.uid());
JSValue result = baseValue.get(globalObject, ident, slot);
LOG_IC((ICEvent::OperationGetByIdGeneric, baseValue.classInfoOrNull(vm), ident, baseValue == slot.slotBase()));
return JSValue::encode(result);
}
JSC_DEFINE_JIT_OPERATION(operationGetByIdOptimize, EncodedJSValue, (JSGlobalObject* globalObject, StructureStubInfo* stubInfo, EncodedJSValue base, uintptr_t rawCacheableIdentifier))
{
SuperSamplerScope superSamplerScope(false);
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
CacheableIdentifier identifier = CacheableIdentifier::createFromRawBits(rawCacheableIdentifier);
Identifier ident = Identifier::fromUid(vm, identifier.uid());
JSValue baseValue = JSValue::decode(base);
return JSValue::encode(baseValue.getPropertySlot(globalObject, ident, [&] (bool found, PropertySlot& slot) -> JSValue {
LOG_IC((ICEvent::OperationGetByIdOptimize, baseValue.classInfoOrNull(vm), ident, baseValue == slot.slotBase()));
CodeBlock* codeBlock = callFrame->codeBlock();
if (stubInfo->considerCachingBy(vm, codeBlock, baseValue.structureOrNull(vm), identifier))
repatchGetBy(globalObject, codeBlock, baseValue, identifier, slot, *stubInfo, GetByKind::Normal);
return found ? slot.getValue(globalObject, ident) : jsUndefined();
}));
}
JSC_DEFINE_JIT_OPERATION(operationGetByIdWithThis, EncodedJSValue, (JSGlobalObject* globalObject, StructureStubInfo* stubInfo, EncodedJSValue base, EncodedJSValue thisEncoded, uintptr_t rawCacheableIdentifier))
{
SuperSamplerScope superSamplerScope(false);
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
CacheableIdentifier identifier = CacheableIdentifier::createFromRawBits(rawCacheableIdentifier);
Identifier ident = Identifier::fromUid(vm, identifier.uid());
stubInfo->tookSlowPath = true;
JSValue baseValue = JSValue::decode(base);
JSValue thisValue = JSValue::decode(thisEncoded);
PropertySlot slot(thisValue, PropertySlot::InternalMethodType::Get);
return JSValue::encode(baseValue.get(globalObject, ident, slot));
}
JSC_DEFINE_JIT_OPERATION(operationGetByIdWithThisGeneric, EncodedJSValue, (JSGlobalObject* globalObject, EncodedJSValue base, EncodedJSValue thisEncoded, uintptr_t rawCacheableIdentifier))
{
SuperSamplerScope superSamplerScope(false);
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
CacheableIdentifier identifier = CacheableIdentifier::createFromRawBits(rawCacheableIdentifier);
Identifier ident = Identifier::fromUid(vm, identifier.uid());
JSValue baseValue = JSValue::decode(base);
JSValue thisValue = JSValue::decode(thisEncoded);
PropertySlot slot(thisValue, PropertySlot::InternalMethodType::Get);
return JSValue::encode(baseValue.get(globalObject, ident, slot));
}
JSC_DEFINE_JIT_OPERATION(operationGetByIdWithThisOptimize, EncodedJSValue, (JSGlobalObject* globalObject, StructureStubInfo* stubInfo, EncodedJSValue base, EncodedJSValue thisEncoded, uintptr_t rawCacheableIdentifier))
{
SuperSamplerScope superSamplerScope(false);
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
CacheableIdentifier identifier = CacheableIdentifier::createFromRawBits(rawCacheableIdentifier);
Identifier ident = Identifier::fromUid(vm, identifier.uid());
JSValue baseValue = JSValue::decode(base);
JSValue thisValue = JSValue::decode(thisEncoded);
PropertySlot slot(thisValue, PropertySlot::InternalMethodType::Get);
return JSValue::encode(baseValue.getPropertySlot(globalObject, ident, slot, [&] (bool found, PropertySlot& slot) -> JSValue {
LOG_IC((ICEvent::OperationGetByIdWithThisOptimize, baseValue.classInfoOrNull(vm), ident, baseValue == slot.slotBase()));
CodeBlock* codeBlock = callFrame->codeBlock();
if (stubInfo->considerCachingBy(vm, codeBlock, baseValue.structureOrNull(vm), identifier))
repatchGetBy(globalObject, codeBlock, baseValue, identifier, slot, *stubInfo, GetByKind::WithThis);
return found ? slot.getValue(globalObject, ident) : jsUndefined();
}));
}
JSC_DEFINE_JIT_OPERATION(operationInById, EncodedJSValue, (JSGlobalObject* globalObject, StructureStubInfo* stubInfo, EncodedJSValue base, uintptr_t rawCacheableIdentifier))
{
SuperSamplerScope superSamplerScope(false);
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
auto scope = DECLARE_THROW_SCOPE(vm);
stubInfo->tookSlowPath = true;
CacheableIdentifier identifier = CacheableIdentifier::createFromRawBits(rawCacheableIdentifier);
Identifier ident = Identifier::fromUid(vm, identifier.uid());
JSValue baseValue = JSValue::decode(base);
if (!baseValue.isObject()) {
throwException(globalObject, scope, createInvalidInParameterError(globalObject, baseValue));
return JSValue::encode(jsUndefined());
}
JSObject* baseObject = asObject(baseValue);
LOG_IC((ICEvent::OperationInById, baseObject->classInfo(vm), ident));
scope.release();
PropertySlot slot(baseObject, PropertySlot::InternalMethodType::HasProperty);
return JSValue::encode(jsBoolean(baseObject->getPropertySlot(globalObject, ident, slot)));
}
JSC_DEFINE_JIT_OPERATION(operationInByIdOptimize, EncodedJSValue, (JSGlobalObject* globalObject, StructureStubInfo* stubInfo, EncodedJSValue base, uintptr_t rawCacheableIdentifier))
{
SuperSamplerScope superSamplerScope(false);
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
auto scope = DECLARE_THROW_SCOPE(vm);
CacheableIdentifier identifier = CacheableIdentifier::createFromRawBits(rawCacheableIdentifier);
Identifier ident = Identifier::fromUid(vm, identifier.uid());
JSValue baseValue = JSValue::decode(base);
if (!baseValue.isObject()) {
throwException(globalObject, scope, createInvalidInParameterError(globalObject, baseValue));
return JSValue::encode(jsUndefined());
}
JSObject* baseObject = asObject(baseValue);
LOG_IC((ICEvent::OperationInByIdOptimize, baseObject->classInfo(vm), ident));
scope.release();
PropertySlot slot(baseObject, PropertySlot::InternalMethodType::HasProperty);
bool found = baseObject->getPropertySlot(globalObject, ident, slot);
CodeBlock* codeBlock = callFrame->codeBlock();
if (stubInfo->considerCachingBy(vm, codeBlock, baseObject->structure(vm), identifier))
repatchInByID(globalObject, codeBlock, baseObject, identifier, found, slot, *stubInfo);
return JSValue::encode(jsBoolean(found));
}
JSC_DEFINE_JIT_OPERATION(operationInByVal, EncodedJSValue, (JSGlobalObject* globalObject, JSCell* base, EncodedJSValue key))
{
SuperSamplerScope superSamplerScope(false);
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
return JSValue::encode(jsBoolean(CommonSlowPaths::opInByVal(globalObject, base, JSValue::decode(key))));
}
JSC_DEFINE_JIT_OPERATION(operationPutByIdStrict, void, (JSGlobalObject* globalObject, StructureStubInfo* stubInfo, EncodedJSValue encodedValue, EncodedJSValue encodedBase, uintptr_t rawCacheableIdentifier))
{
SuperSamplerScope superSamplerScope(false);
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
stubInfo->tookSlowPath = true;
JSValue baseValue = JSValue::decode(encodedBase);
CacheableIdentifier identifier = CacheableIdentifier::createFromRawBits(rawCacheableIdentifier);
Identifier ident = Identifier::fromUid(vm, identifier.uid());
PutPropertySlot slot(baseValue, true, callFrame->codeBlock()->putByIdContext());
baseValue.putInline(globalObject, ident, JSValue::decode(encodedValue), slot);
LOG_IC((ICEvent::OperationPutByIdStrict, baseValue.classInfoOrNull(vm), ident, slot.base() == baseValue));
}
JSC_DEFINE_JIT_OPERATION(operationPutByIdNonStrict, void, (JSGlobalObject* globalObject, StructureStubInfo* stubInfo, EncodedJSValue encodedValue, EncodedJSValue encodedBase, uintptr_t rawCacheableIdentifier))
{
SuperSamplerScope superSamplerScope(false);
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
stubInfo->tookSlowPath = true;
JSValue baseValue = JSValue::decode(encodedBase);
CacheableIdentifier identifier = CacheableIdentifier::createFromRawBits(rawCacheableIdentifier);
Identifier ident = Identifier::fromUid(vm, identifier.uid());
PutPropertySlot slot(baseValue, false, callFrame->codeBlock()->putByIdContext());
baseValue.putInline(globalObject, ident, JSValue::decode(encodedValue), slot);
LOG_IC((ICEvent::OperationPutByIdNonStrict, baseValue.classInfoOrNull(vm), ident, slot.base() == baseValue));
}
JSC_DEFINE_JIT_OPERATION(operationPutByIdDirectStrict, void, (JSGlobalObject* globalObject, StructureStubInfo* stubInfo, EncodedJSValue encodedValue, EncodedJSValue encodedBase, uintptr_t rawCacheableIdentifier))
{
SuperSamplerScope superSamplerScope(false);
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
stubInfo->tookSlowPath = true;
JSValue baseValue = JSValue::decode(encodedBase);
CacheableIdentifier identifier = CacheableIdentifier::createFromRawBits(rawCacheableIdentifier);
Identifier ident = Identifier::fromUid(vm, identifier.uid());
PutPropertySlot slot(baseValue, true, callFrame->codeBlock()->putByIdContext());
CommonSlowPaths::putDirectWithReify(vm, globalObject, asObject(baseValue), ident, JSValue::decode(encodedValue), slot);
LOG_IC((ICEvent::OperationPutByIdDirectStrict, baseValue.classInfoOrNull(vm), ident, slot.base() == baseValue));
}
JSC_DEFINE_JIT_OPERATION(operationPutByIdDirectNonStrict, void, (JSGlobalObject* globalObject, StructureStubInfo* stubInfo, EncodedJSValue encodedValue, EncodedJSValue encodedBase, uintptr_t rawCacheableIdentifier))
{
SuperSamplerScope superSamplerScope(false);
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
stubInfo->tookSlowPath = true;
JSValue baseValue = JSValue::decode(encodedBase);
CacheableIdentifier identifier = CacheableIdentifier::createFromRawBits(rawCacheableIdentifier);
Identifier ident = Identifier::fromUid(vm, identifier.uid());
PutPropertySlot slot(baseValue, false, callFrame->codeBlock()->putByIdContext());
CommonSlowPaths::putDirectWithReify(vm, globalObject, asObject(baseValue), ident, JSValue::decode(encodedValue), slot);
LOG_IC((ICEvent::OperationPutByIdDirectNonStrict, baseValue.classInfoOrNull(vm), ident, slot.base() == baseValue));
}
JSC_DEFINE_JIT_OPERATION(operationPutByIdStrictOptimize, void, (JSGlobalObject* globalObject, StructureStubInfo* stubInfo, EncodedJSValue encodedValue, EncodedJSValue encodedBase, uintptr_t rawCacheableIdentifier))
{
SuperSamplerScope superSamplerScope(false);
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
auto scope = DECLARE_THROW_SCOPE(vm);
CacheableIdentifier identifier = CacheableIdentifier::createFromRawBits(rawCacheableIdentifier);
Identifier ident = Identifier::fromUid(vm, identifier.uid());
AccessType accessType = static_cast<AccessType>(stubInfo->accessType);
JSValue value = JSValue::decode(encodedValue);
JSValue baseValue = JSValue::decode(encodedBase);
CodeBlock* codeBlock = callFrame->codeBlock();
PutPropertySlot slot(baseValue, true, codeBlock->putByIdContext());
Structure* structure = CommonSlowPaths::originalStructureBeforePut(vm, baseValue);
baseValue.putInline(globalObject, ident, value, slot);
LOG_IC((ICEvent::OperationPutByIdStrictOptimize, baseValue.classInfoOrNull(vm), ident, slot.base() == baseValue));
RETURN_IF_EXCEPTION(scope, void());
if (accessType != static_cast<AccessType>(stubInfo->accessType))
return;
if (stubInfo->considerCachingBy(vm, codeBlock, structure, identifier))
repatchPutByID(globalObject, codeBlock, baseValue, structure, identifier, slot, *stubInfo, PutKind::NotDirect);
}
JSC_DEFINE_JIT_OPERATION(operationPutByIdNonStrictOptimize, void, (JSGlobalObject* globalObject, StructureStubInfo* stubInfo, EncodedJSValue encodedValue, EncodedJSValue encodedBase, uintptr_t rawCacheableIdentifier))
{
SuperSamplerScope superSamplerScope(false);
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
auto scope = DECLARE_THROW_SCOPE(vm);
CacheableIdentifier identifier = CacheableIdentifier::createFromRawBits(rawCacheableIdentifier);
Identifier ident = Identifier::fromUid(vm, identifier.uid());
AccessType accessType = static_cast<AccessType>(stubInfo->accessType);
JSValue value = JSValue::decode(encodedValue);
JSValue baseValue = JSValue::decode(encodedBase);
CodeBlock* codeBlock = callFrame->codeBlock();
PutPropertySlot slot(baseValue, false, codeBlock->putByIdContext());
Structure* structure = CommonSlowPaths::originalStructureBeforePut(vm, baseValue);
baseValue.putInline(globalObject, ident, value, slot);
LOG_IC((ICEvent::OperationPutByIdNonStrictOptimize, baseValue.classInfoOrNull(vm), ident, slot.base() == baseValue));
RETURN_IF_EXCEPTION(scope, void());
if (accessType != static_cast<AccessType>(stubInfo->accessType))
return;
if (stubInfo->considerCachingBy(vm, codeBlock, structure, identifier))
repatchPutByID(globalObject, codeBlock, baseValue, structure, identifier, slot, *stubInfo, PutKind::NotDirect);
}
JSC_DEFINE_JIT_OPERATION(operationPutByIdDirectStrictOptimize, void, (JSGlobalObject* globalObject, StructureStubInfo* stubInfo, EncodedJSValue encodedValue, EncodedJSValue encodedBase, uintptr_t rawCacheableIdentifier))
{
SuperSamplerScope superSamplerScope(false);
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
auto scope = DECLARE_THROW_SCOPE(vm);
CacheableIdentifier identifier = CacheableIdentifier::createFromRawBits(rawCacheableIdentifier);
Identifier ident = Identifier::fromUid(vm, identifier.uid());
AccessType accessType = static_cast<AccessType>(stubInfo->accessType);
JSValue value = JSValue::decode(encodedValue);
JSObject* baseObject = asObject(JSValue::decode(encodedBase));
CodeBlock* codeBlock = callFrame->codeBlock();
PutPropertySlot slot(baseObject, true, codeBlock->putByIdContext());
Structure* structure = nullptr;
CommonSlowPaths::putDirectWithReify(vm, globalObject, baseObject, ident, value, slot, &structure);
LOG_IC((ICEvent::OperationPutByIdDirectStrictOptimize, baseObject->classInfo(vm), ident, slot.base() == baseObject));
RETURN_IF_EXCEPTION(scope, void());
if (accessType != static_cast<AccessType>(stubInfo->accessType))
return;
if (stubInfo->considerCachingBy(vm, codeBlock, structure, identifier))
repatchPutByID(globalObject, codeBlock, baseObject, structure, identifier, slot, *stubInfo, PutKind::Direct);
}
JSC_DEFINE_JIT_OPERATION(operationPutByIdDirectNonStrictOptimize, void, (JSGlobalObject* globalObject, StructureStubInfo* stubInfo, EncodedJSValue encodedValue, EncodedJSValue encodedBase, uintptr_t rawCacheableIdentifier))
{
SuperSamplerScope superSamplerScope(false);
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
auto scope = DECLARE_THROW_SCOPE(vm);
CacheableIdentifier identifier = CacheableIdentifier::createFromRawBits(rawCacheableIdentifier);
Identifier ident = Identifier::fromUid(vm, identifier.uid());
AccessType accessType = static_cast<AccessType>(stubInfo->accessType);
JSValue value = JSValue::decode(encodedValue);
JSObject* baseObject = asObject(JSValue::decode(encodedBase));
CodeBlock* codeBlock = callFrame->codeBlock();
PutPropertySlot slot(baseObject, false, codeBlock->putByIdContext());
Structure* structure = nullptr;
CommonSlowPaths::putDirectWithReify(vm, globalObject, baseObject, ident, value, slot, &structure);
LOG_IC((ICEvent::OperationPutByIdDirectNonStrictOptimize, baseObject->classInfo(vm), ident, slot.base() == baseObject));
RETURN_IF_EXCEPTION(scope, void());
if (accessType != static_cast<AccessType>(stubInfo->accessType))
return;
if (stubInfo->considerCachingBy(vm, codeBlock, structure, identifier))
repatchPutByID(globalObject, codeBlock, baseObject, structure, identifier, slot, *stubInfo, PutKind::Direct);
}
template<typename PutPrivateFieldCallback>
ALWAYS_INLINE static void setPrivateField(VM& vm, JSGlobalObject* globalObject, CallFrame* callFrame, JSValue baseValue, CacheableIdentifier identifier, JSValue value, PutPrivateFieldCallback callback)
{
auto scope = DECLARE_THROW_SCOPE(vm);
Identifier ident = Identifier::fromUid(vm, identifier.uid());
ASSERT(ident.isPrivateName());
JSObject* baseObject = baseValue.toObject(globalObject);
RETURN_IF_EXCEPTION(scope, void());
CodeBlock* codeBlock = callFrame->codeBlock();
Structure* oldStructure = baseObject->structure(vm);
PutPropertySlot putSlot(baseObject, true, codeBlock->putByIdContext());
baseObject->setPrivateField(globalObject, ident, value, putSlot);
RETURN_IF_EXCEPTION(scope, void());
callback(vm, codeBlock, oldStructure, putSlot, ident);
}
template<typename PutPrivateFieldCallback>
ALWAYS_INLINE static void definePrivateField(VM& vm, JSGlobalObject* globalObject, CallFrame* callFrame, JSValue baseValue, CacheableIdentifier identifier, JSValue value, PutPrivateFieldCallback callback)
{
auto scope = DECLARE_THROW_SCOPE(vm);
Identifier ident = Identifier::fromUid(vm, identifier.uid());
ASSERT(ident.isPrivateName());
JSObject* baseObject = baseValue.toObject(globalObject);
RETURN_IF_EXCEPTION(scope, void());
CodeBlock* codeBlock = callFrame->codeBlock();
Structure* oldStructure = baseObject->structure(vm);
PutPropertySlot putSlot(baseObject, true, codeBlock->putByIdContext());
baseObject->definePrivateField(globalObject, ident, value, putSlot);
RETURN_IF_EXCEPTION(scope, void());
callback(vm, codeBlock, oldStructure, putSlot, ident);
}
JSC_DEFINE_JIT_OPERATION(operationPutByIdDefinePrivateFieldStrict, void, (JSGlobalObject* globalObject, StructureStubInfo*, EncodedJSValue encodedValue, EncodedJSValue encodedBase, uintptr_t rawCacheableIdentifier))
{
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
CacheableIdentifier identifier = CacheableIdentifier::createFromRawBits(rawCacheableIdentifier);
JSValue value = JSValue::decode(encodedValue);
JSValue baseValue = JSValue::decode(encodedBase);
definePrivateField(vm, globalObject, callFrame, baseValue, identifier, value, [](VM&, CodeBlock*, Structure*, PutPropertySlot&, const Identifier&) { });
}
JSC_DEFINE_JIT_OPERATION(operationPutByIdDefinePrivateFieldStrictOptimize, void, (JSGlobalObject* globalObject, StructureStubInfo* stubInfo, EncodedJSValue encodedValue, EncodedJSValue encodedBase, uintptr_t rawCacheableIdentifier))
{
SuperSamplerScope superSamplerScope(false);
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
CacheableIdentifier identifier = CacheableIdentifier::createFromRawBits(rawCacheableIdentifier);
AccessType accessType = static_cast<AccessType>(stubInfo->accessType);
JSValue value = JSValue::decode(encodedValue);
JSValue baseValue = JSValue::decode(encodedBase);
definePrivateField(vm, globalObject, callFrame, baseValue, identifier, value, [=](VM& vm, CodeBlock* codeBlock, Structure* oldStructure, PutPropertySlot& putSlot, const Identifier& ident) {
JSObject* baseObject = asObject(baseValue);
LOG_IC((ICEvent::OperationPutByIdDefinePrivateFieldFieldStrictOptimize, baseObject->classInfo(vm), ident, putSlot.base() == baseObject));
ASSERT_UNUSED(accessType, accessType == static_cast<AccessType>(stubInfo->accessType));
if (stubInfo->considerCachingBy(vm, codeBlock, oldStructure, identifier))
repatchPutByID(globalObject, codeBlock, baseObject, oldStructure, identifier, putSlot, *stubInfo, PutKind::DirectPrivateFieldDefine);
});
}
JSC_DEFINE_JIT_OPERATION(operationPutByIdSetPrivateFieldStrict, void, (JSGlobalObject* globalObject, StructureStubInfo*, EncodedJSValue encodedValue, EncodedJSValue encodedBase, uintptr_t rawCacheableIdentifier))
{
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
CacheableIdentifier identifier = CacheableIdentifier::createFromRawBits(rawCacheableIdentifier);
JSValue value = JSValue::decode(encodedValue);
JSValue baseValue = JSValue::decode(encodedBase);
setPrivateField(vm, globalObject, callFrame, baseValue, identifier, value, [](VM&, CodeBlock*, Structure*, PutPropertySlot&, const Identifier&) { });
}
JSC_DEFINE_JIT_OPERATION(operationPutByIdSetPrivateFieldStrictOptimize, void, (JSGlobalObject* globalObject, StructureStubInfo* stubInfo, EncodedJSValue encodedValue, EncodedJSValue encodedBase, uintptr_t rawCacheableIdentifier))
{
SuperSamplerScope superSamplerScope(false);
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
CacheableIdentifier identifier = CacheableIdentifier::createFromRawBits(rawCacheableIdentifier);
AccessType accessType = static_cast<AccessType>(stubInfo->accessType);
JSValue value = JSValue::decode(encodedValue);
JSValue baseValue = JSValue::decode(encodedBase);
setPrivateField(vm, globalObject, callFrame, baseValue, identifier, value, [&](VM& vm, CodeBlock* codeBlock, Structure* oldStructure, PutPropertySlot& putSlot, const Identifier& ident) {
JSObject* baseObject = asObject(baseValue);
LOG_IC((ICEvent::OperationPutByIdPutPrivateFieldFieldStrictOptimize, baseObject->classInfo(vm), ident, putSlot.base() == baseObject));
ASSERT_UNUSED(accessType, accessType == static_cast<AccessType>(stubInfo->accessType));
if (stubInfo->considerCachingBy(vm, codeBlock, oldStructure, identifier))
repatchPutByID(globalObject, codeBlock, baseObject, oldStructure, identifier, putSlot, *stubInfo, PutKind::DirectPrivateFieldSet);
});
}
static void putByVal(JSGlobalObject* globalObject, JSValue baseValue, JSValue subscript, JSValue value, ByValInfo* byValInfo, ECMAMode ecmaMode)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
if (Optional<uint32_t> index = subscript.tryGetAsUint32Index()) {
byValInfo->tookSlowPath = true;
uint32_t i = *index;
if (baseValue.isObject()) {
JSObject* object = asObject(baseValue);
if (object->canSetIndexQuickly(i, value)) {
object->setIndexQuickly(vm, i, value);
return;
}
byValInfo->arrayProfile->setOutOfBounds();
scope.release();
object->methodTable(vm)->putByIndex(object, globalObject, i, value, ecmaMode.isStrict());
return;
}
scope.release();
baseValue.putByIndex(globalObject, i, value, ecmaMode.isStrict());
return;
}
if (subscript.isNumber()) {
byValInfo->tookSlowPath = true;
if (baseValue.isObject())
byValInfo->arrayProfile->setOutOfBounds();
}
auto property = subscript.toPropertyKey(globalObject);
// Don't put to an object if toString threw an exception.
RETURN_IF_EXCEPTION(scope, void());
if (byValInfo->stubInfo && (!CacheableIdentifier::isCacheableIdentifierCell(subscript) || byValInfo->cachedId.uid() != property))
byValInfo->tookSlowPath = true;
scope.release();
PutPropertySlot slot(baseValue, ecmaMode.isStrict());
baseValue.putInline(globalObject, property, value, slot);
}
static void directPutByVal(JSGlobalObject* globalObject, JSObject* baseObject, JSValue subscript, JSValue value, ByValInfo* byValInfo, ECMAMode ecmaMode)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
if (Optional<uint32_t> maybeIndex = subscript.tryGetAsUint32Index()) {
byValInfo->tookSlowPath = true;
uint32_t index = *maybeIndex;
switch (baseObject->indexingType()) {
case ALL_INT32_INDEXING_TYPES:
case ALL_DOUBLE_INDEXING_TYPES:
case ALL_CONTIGUOUS_INDEXING_TYPES:
case ALL_ARRAY_STORAGE_INDEXING_TYPES:
if (index < baseObject->butterfly()->vectorLength())
break;
FALLTHROUGH;
default:
byValInfo->arrayProfile->setOutOfBounds();
break;
}
scope.release();
baseObject->putDirectIndex(globalObject, index, value, 0, ecmaMode.isStrict() ? PutDirectIndexShouldThrow : PutDirectIndexShouldNotThrow);
return;
}
// Don't put to an object if toString threw an exception.
auto property = subscript.toPropertyKey(globalObject);
RETURN_IF_EXCEPTION(scope, void());
if (Optional<uint32_t> index = parseIndex(property)) {
byValInfo->tookSlowPath = true;
scope.release();
baseObject->putDirectIndex(globalObject, index.value(), value, 0, ecmaMode.isStrict() ? PutDirectIndexShouldThrow : PutDirectIndexShouldNotThrow);
return;
}
if (byValInfo->stubInfo && (!CacheableIdentifier::isCacheableIdentifierCell(subscript) || byValInfo->cachedId.uid() != property))
byValInfo->tookSlowPath = true;
scope.release();
PutPropertySlot slot(baseObject, ecmaMode.isStrict());
CommonSlowPaths::putDirectWithReify(vm, globalObject, baseObject, property, value, slot);
}
enum class OptimizationResult {
NotOptimized,
SeenOnce,
Optimized,
GiveUp,
};
static OptimizationResult tryPutByValOptimize(JSGlobalObject* globalObject, CallFrame* callFrame, CodeBlock* codeBlock, JSValue baseValue, JSValue subscript, ByValInfo* byValInfo, ReturnAddressPtr returnAddress)
{
UNUSED_PARAM(callFrame);
// See if it's worth optimizing at all.
OptimizationResult optimizationResult = OptimizationResult::NotOptimized;
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
if (baseValue.isObject() && isCopyOnWrite(baseValue.getObject()->indexingMode()))
return OptimizationResult::GiveUp;
if (baseValue.isObject() && subscript.isInt32()) {
JSObject* object = asObject(baseValue);
ASSERT(callFrame->bytecodeIndex() != BytecodeIndex(0));
ASSERT(!byValInfo->stubRoutine);
Structure* structure = object->structure(vm);
if (hasOptimizableIndexing(structure)) {
// Attempt to optimize.
JITArrayMode arrayMode = jitArrayModeForStructure(structure);
if (jitArrayModePermitsPut(arrayMode) && arrayMode != byValInfo->arrayMode) {
ConcurrentJSLocker locker(codeBlock->m_lock);
byValInfo->arrayProfile->computeUpdatedPrediction(locker, codeBlock, structure);
JIT::compilePutByVal(locker, vm, codeBlock, byValInfo, returnAddress, arrayMode);
optimizationResult = OptimizationResult::Optimized;
}
}
// If we failed to patch and we have some object that intercepts indexed get, then don't even wait until 10 times.
if (optimizationResult != OptimizationResult::Optimized && object->structure(vm)->typeInfo().interceptsGetOwnPropertySlotByIndexEvenWhenLengthIsNotZero())
optimizationResult = OptimizationResult::GiveUp;
}
if (baseValue.isObject() && CacheableIdentifier::isCacheableIdentifierCell(subscript)) {
const Identifier propertyName = subscript.toPropertyKey(globalObject);
RETURN_IF_EXCEPTION(scope, OptimizationResult::GiveUp);
if (subscript.isSymbol() || !parseIndex(propertyName)) {
ASSERT(callFrame->bytecodeIndex() != BytecodeIndex(0));
ASSERT(!byValInfo->stubRoutine);
if (byValInfo->seen) {
if (byValInfo->cachedId.uid() == propertyName) {
JIT::compilePutByValWithCachedId<OpPutByVal>(vm, codeBlock, byValInfo, returnAddress, PutKind::NotDirect, byValInfo->cachedId);
optimizationResult = OptimizationResult::Optimized;
} else {
// Seem like a generic property access site.
optimizationResult = OptimizationResult::GiveUp;
}
} else {
{
ConcurrentJSLocker locker(codeBlock->m_lock);
byValInfo->seen = true;
byValInfo->cachedId = CacheableIdentifier::createFromCell(subscript.asCell());
optimizationResult = OptimizationResult::SeenOnce;
}
vm.heap.writeBarrier(codeBlock, subscript.asCell());
}
}
}
if (optimizationResult != OptimizationResult::Optimized && optimizationResult != OptimizationResult::SeenOnce) {
// If we take slow path more than 10 times without patching then make sure we
// never make that mistake again. For cases where we see non-index-intercepting
// objects, this gives 10 iterations worth of opportunity for us to observe
// that the put_by_val may be polymorphic. We count up slowPathCount even if
// the result is GiveUp.
if (++byValInfo->slowPathCount >= 10)
optimizationResult = OptimizationResult::GiveUp;
}
return optimizationResult;
}
JSC_DEFINE_JIT_OPERATION(operationPutByValOptimize, void, (JSGlobalObject* globalObject, EncodedJSValue encodedBaseValue, EncodedJSValue encodedSubscript, EncodedJSValue encodedValue, ByValInfo* byValInfo, ECMAMode ecmaMode))
{
VM& vm = globalObject->vm();
CallFrame* callFrame = DECLARE_CALL_FRAME(vm);
JITOperationPrologueCallFrameTracer tracer(vm, callFrame);
auto scope = DECLARE_THROW_SCOPE(vm);
JSValue baseValue = JSValue::decode(encodedBaseValue);
JSValue subscript = JSValue::decode(encodedSubscript);
JSValue value = JSValue::decode(encodedValue);
CodeBlock* codeBlock = callFrame->codeBlock();
OptimizationResult result = tryPutByValOptimize(globalObject, callFrame, codeBlock, baseValue, subscript, byValInfo, ReturnAddressPtr(OUR_RETURN_ADDRESS));
RETURN_IF_EXCEPTION(scope, void());
if (result == OptimizationResult::GiveUp) {
// Don't ever try to optimize.
byValInfo->tookSlowPath = true;
ctiPatchCallByReturnAddress(ReturnAddressPtr(OUR_RETURN_ADDRESS), operationPutByValGeneric);
}
RELEASE_AND_RETURN(scope, putByVal(globalObject, baseValue, subscript, value, byValInfo, ecmaMode));
}
static OptimizationResult tryDirectPutByValOptimize(JSGlobalObject* globalObject, CallFrame* callFrame, CodeBlock* codeBlock, JSObject* object, JSValue subscript, ByValInfo* byValInfo, ReturnAddressPtr returnAddress)
{
UNUSED_PARAM(callFrame);
// See if it's worth optimizing at all.
OptimizationResult optimizationResult = OptimizationResult::NotOptimized;
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
if (subscript.isInt32()) {
ASSERT(callFrame->bytecodeIndex() != BytecodeIndex(0));
ASSERT(!byValInfo->stubRoutine);
Structure* structure = object->structure(vm);
if (hasOptimizableIndexing(structure)) {
// Attempt to optimize.
JITArrayMode arrayMode = jitArrayModeForStructure(structure);
if (jitArrayModePermitsPutDirect(arrayMode) && arrayMode != byValInfo->arrayMode) {
ConcurrentJSLocker locker(codeBlock->m_lock);
byValInfo->arrayProfile->computeUpdatedPrediction(locker, codeBlock, structure);
JIT::compileDirectPutByVal(locker, vm, codeBlock, byValInfo, returnAddress, arrayMode);
optimizationResult = OptimizationResult::Optimized;
}
}