| /* |
| * Copyright (C) 2011-2020 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 "CommonSlowPaths.h" |
| |
| #include "ArithProfile.h" |
| #include "BytecodeStructs.h" |
| #include "ClonedArguments.h" |
| #include "DefinePropertyAttributes.h" |
| #include "DirectArguments.h" |
| #include "ErrorHandlingScope.h" |
| #include "ExceptionFuzz.h" |
| #include "FrameTracers.h" |
| #include "JSArrayIterator.h" |
| #include "JSAsyncGenerator.h" |
| #include "JSCInlines.h" |
| #include "JSImmutableButterfly.h" |
| #include "JSInternalPromise.h" |
| #include "JSInternalPromiseConstructor.h" |
| #include "JSLexicalEnvironment.h" |
| #include "JSPromiseConstructor.h" |
| #include "JSPropertyNameEnumerator.h" |
| #include "JSWithScope.h" |
| #include "LLIntCommon.h" |
| #include "LLIntExceptions.h" |
| #include "MathCommon.h" |
| #include "ObjectConstructor.h" |
| #include "ScopedArguments.h" |
| #include "TypeProfilerLog.h" |
| |
| namespace JSC { |
| |
| #define BEGIN_NO_SET_PC() \ |
| CodeBlock* codeBlock = callFrame->codeBlock(); \ |
| JSGlobalObject* globalObject = codeBlock->globalObject(); \ |
| VM& vm = codeBlock->vm(); \ |
| SlowPathFrameTracer tracer(vm, callFrame); \ |
| auto throwScope = DECLARE_THROW_SCOPE(vm); \ |
| UNUSED_PARAM(throwScope) |
| |
| #ifndef NDEBUG |
| #define SET_PC_FOR_STUBS() do { \ |
| codeBlock->bytecodeOffset(pc); \ |
| callFrame->setCurrentVPC(pc); \ |
| } while (false) |
| #else |
| #define SET_PC_FOR_STUBS() do { \ |
| callFrame->setCurrentVPC(pc); \ |
| } while (false) |
| #endif |
| |
| #define RETURN_TO_THROW(pc) pc = LLInt::returnToThrow(vm) |
| |
| #define BEGIN() \ |
| BEGIN_NO_SET_PC(); \ |
| SET_PC_FOR_STUBS() |
| |
| #define GET(operand) (callFrame->uncheckedR(operand)) |
| #define GET_C(operand) (callFrame->r(operand)) |
| |
| #define RETURN_TWO(first, second) do { \ |
| return encodeResult(first, second); \ |
| } while (false) |
| |
| #define END_IMPL() RETURN_TWO(pc, callFrame) |
| |
| #define THROW(exceptionToThrow) do { \ |
| throwException(globalObject, throwScope, exceptionToThrow); \ |
| RETURN_TO_THROW(pc); \ |
| END_IMPL(); \ |
| } while (false) |
| |
| #define CHECK_EXCEPTION() do { \ |
| doExceptionFuzzingIfEnabled(globalObject, throwScope, "CommonSlowPaths", pc); \ |
| if (UNLIKELY(throwScope.exception())) { \ |
| RETURN_TO_THROW(pc); \ |
| END_IMPL(); \ |
| } \ |
| } while (false) |
| |
| #define END() do { \ |
| CHECK_EXCEPTION(); \ |
| END_IMPL(); \ |
| } while (false) |
| |
| #define BRANCH(condition) do { \ |
| bool bCondition = (condition); \ |
| CHECK_EXCEPTION(); \ |
| if (bCondition) \ |
| pc = bytecode.m_targetLabel \ |
| ? reinterpret_cast<const Instruction*>(reinterpret_cast<const uint8_t*>(pc) + bytecode.m_targetLabel) \ |
| : codeBlock->outOfLineJumpTarget(pc); \ |
| else \ |
| pc = reinterpret_cast<const Instruction*>(reinterpret_cast<const uint8_t*>(pc) + pc->size()); \ |
| END_IMPL(); \ |
| } while (false) |
| |
| #define RETURN_WITH_PROFILING_CUSTOM(result__, value__, profilingAction__) do { \ |
| JSValue returnValue__ = (value__); \ |
| CHECK_EXCEPTION(); \ |
| GET(result__) = returnValue__; \ |
| profilingAction__; \ |
| END_IMPL(); \ |
| } while (false) |
| |
| #define RETURN_WITH_PROFILING(value__, profilingAction__) RETURN_WITH_PROFILING_CUSTOM(bytecode.m_dst, value__, profilingAction__) |
| |
| #define RETURN(value) \ |
| RETURN_WITH_PROFILING(value, { }) |
| |
| #define RETURN_PROFILED(value__) \ |
| RETURN_WITH_PROFILING(value__, PROFILE_VALUE(returnValue__)) |
| |
| #define PROFILE_VALUE(value__) \ |
| PROFILE_VALUE_IN(value__, m_profile) |
| |
| #define PROFILE_VALUE_IN(value, profileName) do { \ |
| bytecode.metadata(codeBlock).profileName.m_buckets[0] = JSValue::encode(value); \ |
| } while (false) |
| |
| static void throwArityCheckStackOverflowError(JSGlobalObject* globalObject, ThrowScope& scope) |
| { |
| JSObject* error = createStackOverflowError(globalObject); |
| throwException(globalObject, scope, error); |
| #if LLINT_TRACING |
| if (UNLIKELY(Options::traceLLIntSlowPath())) |
| dataLog("Throwing exception ", JSValue(scope.exception()), ".\n"); |
| #endif |
| } |
| |
| SLOW_PATH_DECL(slow_path_call_arityCheck) |
| { |
| BEGIN(); |
| int slotsToAdd = CommonSlowPaths::arityCheckFor(vm, callFrame, CodeForCall); |
| if (UNLIKELY(slotsToAdd < 0)) { |
| CodeBlock* codeBlock = CommonSlowPaths::codeBlockFromCallFrameCallee(callFrame, CodeForCall); |
| callFrame->convertToStackOverflowFrame(vm, codeBlock); |
| SlowPathFrameTracer tracer(vm, callFrame); |
| ErrorHandlingScope errorScope(vm); |
| throwScope.release(); |
| throwArityCheckStackOverflowError(globalObject, throwScope); |
| RETURN_TWO(bitwise_cast<void*>(static_cast<uintptr_t>(1)), callFrame); |
| } |
| RETURN_TWO(nullptr, bitwise_cast<void*>(static_cast<uintptr_t>(slotsToAdd))); |
| } |
| |
| SLOW_PATH_DECL(slow_path_construct_arityCheck) |
| { |
| BEGIN(); |
| int slotsToAdd = CommonSlowPaths::arityCheckFor(vm, callFrame, CodeForConstruct); |
| if (UNLIKELY(slotsToAdd < 0)) { |
| CodeBlock* codeBlock = CommonSlowPaths::codeBlockFromCallFrameCallee(callFrame, CodeForConstruct); |
| callFrame->convertToStackOverflowFrame(vm, codeBlock); |
| SlowPathFrameTracer tracer(vm, callFrame); |
| ErrorHandlingScope errorScope(vm); |
| throwArityCheckStackOverflowError(globalObject, throwScope); |
| RETURN_TWO(bitwise_cast<void*>(static_cast<uintptr_t>(1)), callFrame); |
| } |
| RETURN_TWO(nullptr, bitwise_cast<void*>(static_cast<uintptr_t>(slotsToAdd))); |
| } |
| |
| SLOW_PATH_DECL(slow_path_create_direct_arguments) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpCreateDirectArguments>(); |
| RETURN(DirectArguments::createByCopying(globalObject, callFrame)); |
| } |
| |
| SLOW_PATH_DECL(slow_path_create_scoped_arguments) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpCreateScopedArguments>(); |
| JSLexicalEnvironment* scope = jsCast<JSLexicalEnvironment*>(GET(bytecode.m_scope).jsValue()); |
| ScopedArgumentsTable* table = scope->symbolTable()->arguments(); |
| RETURN(ScopedArguments::createByCopying(globalObject, callFrame, table, scope)); |
| } |
| |
| SLOW_PATH_DECL(slow_path_create_cloned_arguments) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpCreateClonedArguments>(); |
| RETURN(ClonedArguments::createWithMachineFrame(globalObject, callFrame, ArgumentsMode::Cloned)); |
| } |
| |
| SLOW_PATH_DECL(slow_path_create_arguments_butterfly) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpCreateArgumentsButterfly>(); |
| int32_t argumentCount = callFrame->argumentCount(); |
| JSImmutableButterfly* butterfly = JSImmutableButterfly::tryCreate(vm, vm.immutableButterflyStructures[arrayIndexFromIndexingType(CopyOnWriteArrayWithContiguous) - NumberOfIndexingShapes].get(), argumentCount); |
| if (!butterfly) |
| THROW(createOutOfMemoryError(globalObject)); |
| for (int32_t index = 0; index < argumentCount; ++index) |
| butterfly->setIndex(vm, index, callFrame->uncheckedArgument(index)); |
| RETURN(butterfly); |
| } |
| |
| SLOW_PATH_DECL(slow_path_create_this) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpCreateThis>(); |
| JSObject* result; |
| JSObject* constructorAsObject = asObject(GET(bytecode.m_callee).jsValue()); |
| JSFunction* constructor = jsDynamicCast<JSFunction*>(vm, constructorAsObject); |
| if (constructor && constructor->canUseAllocationProfile()) { |
| WriteBarrier<JSCell>& cachedCallee = bytecode.metadata(codeBlock).m_cachedCallee; |
| if (!cachedCallee) |
| cachedCallee.set(vm, codeBlock, constructor); |
| else if (cachedCallee.unvalidatedGet() != JSCell::seenMultipleCalleeObjects() && cachedCallee.get() != constructor) |
| cachedCallee.setWithoutWriteBarrier(JSCell::seenMultipleCalleeObjects()); |
| |
| size_t inlineCapacity = bytecode.m_inlineCapacity; |
| ObjectAllocationProfileWithPrototype* allocationProfile = constructor->ensureRareDataAndAllocationProfile(globalObject, inlineCapacity)->objectAllocationProfile(); |
| throwScope.releaseAssertNoException(); |
| Structure* structure = allocationProfile->structure(); |
| result = constructEmptyObject(vm, structure); |
| if (structure->hasPolyProto()) { |
| JSObject* prototype = allocationProfile->prototype(); |
| ASSERT(prototype == constructor->prototypeForConstruction(vm, globalObject)); |
| result->putDirect(vm, knownPolyProtoOffset, prototype); |
| prototype->didBecomePrototype(); |
| ASSERT_WITH_MESSAGE(!hasIndexedProperties(result->indexingType()), "We rely on JSFinalObject not starting out with an indexing type otherwise we would potentially need to convert to slow put storage"); |
| } |
| } else { |
| // http://ecma-international.org/ecma-262/6.0/#sec-ordinarycreatefromconstructor |
| JSValue proto = constructorAsObject->get(globalObject, vm.propertyNames->prototype); |
| CHECK_EXCEPTION(); |
| if (proto.isObject()) |
| result = constructEmptyObject(globalObject, asObject(proto)); |
| else |
| result = constructEmptyObject(globalObject); |
| } |
| RETURN(result); |
| } |
| |
| SLOW_PATH_DECL(slow_path_create_promise) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpCreatePromise>(); |
| JSObject* constructorAsObject = asObject(GET(bytecode.m_callee).jsValue()); |
| |
| JSPromise* result = nullptr; |
| if (bytecode.m_isInternalPromise) { |
| Structure* structure = constructorAsObject == globalObject->internalPromiseConstructor() |
| ? globalObject->internalPromiseStructure() |
| : InternalFunction::createSubclassStructure(globalObject, constructorAsObject, getFunctionRealm(vm, constructorAsObject)->internalPromiseStructure()); |
| CHECK_EXCEPTION(); |
| result = JSInternalPromise::create(vm, structure); |
| } else { |
| Structure* structure = constructorAsObject == globalObject->promiseConstructor() |
| ? globalObject->promiseStructure() |
| : InternalFunction::createSubclassStructure(globalObject, constructorAsObject, getFunctionRealm(vm, constructorAsObject)->promiseStructure()); |
| CHECK_EXCEPTION(); |
| result = JSPromise::create(vm, structure); |
| } |
| |
| JSFunction* constructor = jsDynamicCast<JSFunction*>(vm, constructorAsObject); |
| if (constructor && constructor->canUseAllocationProfile()) { |
| WriteBarrier<JSCell>& cachedCallee = bytecode.metadata(codeBlock).m_cachedCallee; |
| if (!cachedCallee) |
| cachedCallee.set(vm, codeBlock, constructor); |
| else if (cachedCallee.unvalidatedGet() != JSCell::seenMultipleCalleeObjects() && cachedCallee.get() != constructor) |
| cachedCallee.setWithoutWriteBarrier(JSCell::seenMultipleCalleeObjects()); |
| } |
| RETURN(result); |
| } |
| |
| SLOW_PATH_DECL(slow_path_new_promise) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpNewPromise>(); |
| JSPromise* result = nullptr; |
| if (bytecode.m_isInternalPromise) |
| result = JSInternalPromise::create(vm, globalObject->internalPromiseStructure()); |
| else |
| result = JSPromise::create(vm, globalObject->promiseStructure()); |
| RETURN(result); |
| } |
| |
| template<typename JSClass, typename Bytecode> |
| static JSClass* createInternalFieldObject(JSGlobalObject* globalObject, VM& vm, CodeBlock* codeBlock, const Bytecode& bytecode, JSObject* constructorAsObject, Structure* baseStructure) |
| { |
| auto scope = DECLARE_THROW_SCOPE(vm); |
| |
| Structure* structure = InternalFunction::createSubclassStructure(globalObject, constructorAsObject, baseStructure); |
| RETURN_IF_EXCEPTION(scope, nullptr); |
| JSClass* result = JSClass::create(vm, structure); |
| |
| JSFunction* constructor = jsDynamicCast<JSFunction*>(vm, constructorAsObject); |
| if (constructor && constructor->canUseAllocationProfile()) { |
| WriteBarrier<JSCell>& cachedCallee = bytecode.metadata(codeBlock).m_cachedCallee; |
| if (!cachedCallee) |
| cachedCallee.set(vm, codeBlock, constructor); |
| else if (cachedCallee.unvalidatedGet() != JSCell::seenMultipleCalleeObjects() && cachedCallee.get() != constructor) |
| cachedCallee.setWithoutWriteBarrier(JSCell::seenMultipleCalleeObjects()); |
| } |
| RELEASE_AND_RETURN(scope, result); |
| } |
| |
| SLOW_PATH_DECL(slow_path_create_generator) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpCreateGenerator>(); |
| RETURN(createInternalFieldObject<JSGenerator>(globalObject, vm, codeBlock, bytecode, asObject(GET(bytecode.m_callee).jsValue()), globalObject->generatorStructure())); |
| } |
| |
| SLOW_PATH_DECL(slow_path_create_async_generator) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpCreateAsyncGenerator>(); |
| RETURN(createInternalFieldObject<JSAsyncGenerator>(globalObject, vm, codeBlock, bytecode, asObject(GET(bytecode.m_callee).jsValue()), globalObject->asyncGeneratorStructure())); |
| } |
| |
| SLOW_PATH_DECL(slow_path_new_generator) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpNewGenerator>(); |
| JSGenerator* result = JSGenerator::create(vm, globalObject->generatorStructure()); |
| RETURN(result); |
| } |
| |
| SLOW_PATH_DECL(slow_path_to_this) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpToThis>(); |
| auto& metadata = bytecode.metadata(codeBlock); |
| JSValue v1 = GET(bytecode.m_srcDst).jsValue(); |
| if (v1.isCell()) { |
| StructureID myStructureID = v1.asCell()->structureID(); |
| StructureID otherStructureID = metadata.m_cachedStructureID; |
| if (myStructureID != otherStructureID) { |
| if (otherStructureID) |
| metadata.m_toThisStatus = ToThisConflicted; |
| metadata.m_cachedStructureID = myStructureID; |
| vm.heap.writeBarrier(codeBlock, vm.getStructure(myStructureID)); |
| } |
| } else { |
| metadata.m_toThisStatus = ToThisConflicted; |
| metadata.m_cachedStructureID = 0; |
| } |
| // Note: We only need to do this value profiling here on the slow path. The fast path |
| // just returns the input to to_this if the structure check succeeds. If the structure |
| // check succeeds, doing value profiling here is equivalent to doing it with a potentially |
| // different object that still has the same structure on the fast path since it'll produce |
| // the same SpeculatedType. Therefore, we don't need to worry about value profiling on the |
| // fast path. |
| auto value = v1.toThis(globalObject, bytecode.m_ecmaMode); |
| RETURN_WITH_PROFILING_CUSTOM(bytecode.m_srcDst, value, PROFILE_VALUE(value)); |
| } |
| |
| SLOW_PATH_DECL(slow_path_throw_tdz_error) |
| { |
| BEGIN(); |
| THROW(createTDZError(globalObject)); |
| } |
| |
| SLOW_PATH_DECL(slow_path_check_tdz) |
| { |
| BEGIN(); |
| THROW(createTDZError(globalObject)); |
| } |
| |
| SLOW_PATH_DECL(slow_path_throw_strict_mode_readonly_property_write_error) |
| { |
| BEGIN(); |
| THROW(createTypeError(globalObject, ReadonlyPropertyWriteError)); |
| } |
| |
| SLOW_PATH_DECL(slow_path_not) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpNot>(); |
| RETURN(jsBoolean(!GET_C(bytecode.m_operand).jsValue().toBoolean(globalObject))); |
| } |
| |
| SLOW_PATH_DECL(slow_path_eq) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpEq>(); |
| RETURN(jsBoolean(JSValue::equal(globalObject, GET_C(bytecode.m_lhs).jsValue(), GET_C(bytecode.m_rhs).jsValue()))); |
| } |
| |
| SLOW_PATH_DECL(slow_path_neq) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpNeq>(); |
| RETURN(jsBoolean(!JSValue::equal(globalObject, GET_C(bytecode.m_lhs).jsValue(), GET_C(bytecode.m_rhs).jsValue()))); |
| } |
| |
| SLOW_PATH_DECL(slow_path_stricteq) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpStricteq>(); |
| RETURN(jsBoolean(JSValue::strictEqual(globalObject, GET_C(bytecode.m_lhs).jsValue(), GET_C(bytecode.m_rhs).jsValue()))); |
| } |
| |
| SLOW_PATH_DECL(slow_path_nstricteq) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpNstricteq>(); |
| RETURN(jsBoolean(!JSValue::strictEqual(globalObject, GET_C(bytecode.m_lhs).jsValue(), GET_C(bytecode.m_rhs).jsValue()))); |
| } |
| |
| SLOW_PATH_DECL(slow_path_less) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpLess>(); |
| RETURN(jsBoolean(jsLess<true>(globalObject, GET_C(bytecode.m_lhs).jsValue(), GET_C(bytecode.m_rhs).jsValue()))); |
| } |
| |
| SLOW_PATH_DECL(slow_path_lesseq) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpLesseq>(); |
| RETURN(jsBoolean(jsLessEq<true>(globalObject, GET_C(bytecode.m_lhs).jsValue(), GET_C(bytecode.m_rhs).jsValue()))); |
| } |
| |
| SLOW_PATH_DECL(slow_path_greater) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpGreater>(); |
| RETURN(jsBoolean(jsLess<false>(globalObject, GET_C(bytecode.m_rhs).jsValue(), GET_C(bytecode.m_lhs).jsValue()))); |
| } |
| |
| SLOW_PATH_DECL(slow_path_greatereq) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpGreatereq>(); |
| RETURN(jsBoolean(jsLessEq<false>(globalObject, GET_C(bytecode.m_rhs).jsValue(), GET_C(bytecode.m_lhs).jsValue()))); |
| } |
| |
| SLOW_PATH_DECL(slow_path_inc) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpInc>(); |
| JSValue argument = GET_C(bytecode.m_srcDst).jsValue(); |
| JSValue result = jsInc(globalObject, argument); |
| CHECK_EXCEPTION(); |
| RETURN_WITH_PROFILING_CUSTOM(bytecode.m_srcDst, result, { }); |
| } |
| |
| SLOW_PATH_DECL(slow_path_dec) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpDec>(); |
| JSValue argument = GET_C(bytecode.m_srcDst).jsValue(); |
| JSValue result = jsDec(globalObject, argument); |
| CHECK_EXCEPTION(); |
| RETURN_WITH_PROFILING_CUSTOM(bytecode.m_srcDst, result, { }); |
| } |
| |
| SLOW_PATH_DECL(slow_path_to_string) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpToString>(); |
| RETURN(GET_C(bytecode.m_operand).jsValue().toString(globalObject)); |
| } |
| |
| #if ENABLE(JIT) |
| static void updateArithProfileForUnaryArithOp(OpNegate::Metadata& metadata, JSValue result, JSValue operand) |
| { |
| UnaryArithProfile& profile = metadata.m_arithProfile; |
| profile.observeArg(operand); |
| ASSERT(result.isNumber() || result.isBigInt()); |
| |
| if (result.isHeapBigInt()) |
| profile.setObservedHeapBigInt(); |
| #if USE(BIGINT32) |
| else if (result.isBigInt32()) |
| profile.setObservedBigInt32(); |
| #endif |
| else { |
| ASSERT(result.isNumber()); |
| if (!result.isInt32()) { |
| if (operand.isInt32()) |
| profile.setObservedInt32Overflow(); |
| |
| double doubleVal = result.asNumber(); |
| if (!doubleVal && std::signbit(doubleVal)) |
| profile.setObservedNegZeroDouble(); |
| else { |
| profile.setObservedNonNegZeroDouble(); |
| |
| // The Int52 overflow check here intentionally omits 1ll << 51 as a valid negative Int52 value. |
| // Therefore, we will get a false positive if the result is that value. This is intentionally |
| // done to simplify the checking algorithm. |
| static const int64_t int52OverflowPoint = (1ll << 51); |
| int64_t int64Val = static_cast<int64_t>(std::abs(doubleVal)); |
| if (int64Val >= int52OverflowPoint) |
| profile.setObservedInt52Overflow(); |
| } |
| } |
| } |
| } |
| #else |
| static void updateArithProfileForUnaryArithOp(OpNegate::Metadata&, JSValue, JSValue) { } |
| #endif |
| |
| SLOW_PATH_DECL(slow_path_negate) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpNegate>(); |
| auto& metadata = bytecode.metadata(codeBlock); |
| JSValue operand = GET_C(bytecode.m_operand).jsValue(); |
| JSValue primValue = operand.toPrimitive(globalObject, PreferNumber); |
| CHECK_EXCEPTION(); |
| |
| #if USE(BIGINT32) |
| if (primValue.isBigInt32()) { |
| JSValue result = JSBigInt::unaryMinus(globalObject, primValue.bigInt32AsInt32()); |
| CHECK_EXCEPTION(); |
| RETURN_WITH_PROFILING(result, { |
| updateArithProfileForUnaryArithOp(metadata, result, operand); |
| }); |
| } |
| #endif |
| |
| if (primValue.isHeapBigInt()) { |
| JSValue result = JSBigInt::unaryMinus(globalObject, primValue.asHeapBigInt()); |
| CHECK_EXCEPTION(); |
| RETURN_WITH_PROFILING(result, { |
| updateArithProfileForUnaryArithOp(metadata, result, operand); |
| }); |
| } |
| |
| JSValue result = jsNumber(-primValue.toNumber(globalObject)); |
| CHECK_EXCEPTION(); |
| RETURN_WITH_PROFILING(result, { |
| updateArithProfileForUnaryArithOp(metadata, result, operand); |
| }); |
| } |
| |
| #if ENABLE(DFG_JIT) |
| static void updateArithProfileForBinaryArithOp(JSGlobalObject*, CodeBlock* codeBlock, const Instruction* pc, JSValue result, JSValue left, JSValue right) |
| { |
| BinaryArithProfile& profile = *codeBlock->binaryArithProfileForPC(pc); |
| |
| if (result.isNumber()) { |
| if (!result.isInt32()) { |
| if (left.isInt32() && right.isInt32()) |
| profile.setObservedInt32Overflow(); |
| |
| double doubleVal = result.asNumber(); |
| if (!doubleVal && std::signbit(doubleVal)) |
| profile.setObservedNegZeroDouble(); |
| else { |
| profile.setObservedNonNegZeroDouble(); |
| |
| // The Int52 overflow check here intentionally omits 1ll << 51 as a valid negative Int52 value. |
| // Therefore, we will get a false positive if the result is that value. This is intentionally |
| // done to simplify the checking algorithm. |
| static const int64_t int52OverflowPoint = (1ll << 51); |
| int64_t int64Val = static_cast<int64_t>(std::abs(doubleVal)); |
| if (int64Val >= int52OverflowPoint) |
| profile.setObservedInt52Overflow(); |
| } |
| } |
| } else if (result.isHeapBigInt()) |
| profile.setObservedHeapBigInt(); |
| #if USE(BIGINT32) |
| else if (result.isBigInt32()) |
| profile.setObservedBigInt32(); |
| #endif |
| else |
| profile.setObservedNonNumeric(); |
| } |
| #else |
| static void updateArithProfileForBinaryArithOp(JSGlobalObject*, CodeBlock*, const Instruction*, JSValue, JSValue, JSValue) { } |
| #endif |
| |
| SLOW_PATH_DECL(slow_path_to_number) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpToNumber>(); |
| JSValue argument = GET_C(bytecode.m_operand).jsValue(); |
| JSValue result = jsNumber(argument.toNumber(globalObject)); |
| RETURN_PROFILED(result); |
| } |
| |
| SLOW_PATH_DECL(slow_path_to_numeric) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpToNumeric>(); |
| JSValue argument = GET_C(bytecode.m_operand).jsValue(); |
| JSValue result = argument.toNumeric(globalObject); |
| CHECK_EXCEPTION(); |
| RETURN_PROFILED(result); |
| } |
| |
| SLOW_PATH_DECL(slow_path_to_object) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpToObject>(); |
| JSValue argument = GET_C(bytecode.m_operand).jsValue(); |
| if (UNLIKELY(argument.isUndefinedOrNull())) { |
| const Identifier& ident = codeBlock->identifier(bytecode.m_message); |
| if (!ident.isEmpty()) |
| THROW(createTypeError(globalObject, ident.impl())); |
| } |
| JSObject* result = argument.toObject(globalObject); |
| RETURN_PROFILED(result); |
| } |
| |
| SLOW_PATH_DECL(slow_path_add) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpAdd>(); |
| JSValue v1 = GET_C(bytecode.m_lhs).jsValue(); |
| JSValue v2 = GET_C(bytecode.m_rhs).jsValue(); |
| |
| BinaryArithProfile& arithProfile = *codeBlock->binaryArithProfileForPC(pc); |
| arithProfile.observeLHSAndRHS(v1, v2); |
| |
| JSValue result = jsAdd(globalObject, v1, v2); |
| |
| RETURN_WITH_PROFILING(result, { |
| updateArithProfileForBinaryArithOp(globalObject, codeBlock, pc, result, v1, v2); |
| }); |
| } |
| |
| // The following arithmetic and bitwise operations need to be sure to run |
| // toNumeric/toBigIntOrInt32() on their operands in order. (A call to these is idempotent |
| // if an exception is already set on the CallFrame.) |
| |
| SLOW_PATH_DECL(slow_path_mul) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpMul>(); |
| JSValue left = GET_C(bytecode.m_lhs).jsValue(); |
| JSValue right = GET_C(bytecode.m_rhs).jsValue(); |
| JSValue result = jsMul(globalObject, left, right); |
| CHECK_EXCEPTION(); |
| RETURN_WITH_PROFILING(result, { |
| updateArithProfileForBinaryArithOp(globalObject, codeBlock, pc, result, left, right); |
| }); |
| } |
| |
| SLOW_PATH_DECL(slow_path_sub) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpSub>(); |
| JSValue left = GET_C(bytecode.m_lhs).jsValue(); |
| JSValue right = GET_C(bytecode.m_rhs).jsValue(); |
| JSValue result = jsSub(globalObject, left, right); |
| CHECK_EXCEPTION(); |
| RETURN_WITH_PROFILING(result, { |
| updateArithProfileForBinaryArithOp(globalObject, codeBlock, pc, result, left, right); |
| }); |
| } |
| |
| SLOW_PATH_DECL(slow_path_div) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpDiv>(); |
| JSValue left = GET_C(bytecode.m_lhs).jsValue(); |
| JSValue right = GET_C(bytecode.m_rhs).jsValue(); |
| JSValue result = jsDiv(globalObject, left, right); |
| CHECK_EXCEPTION(); |
| RETURN_WITH_PROFILING(result, { |
| updateArithProfileForBinaryArithOp(globalObject, codeBlock, pc, result, left, right); |
| }); |
| } |
| |
| SLOW_PATH_DECL(slow_path_mod) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpMod>(); |
| JSValue left = GET_C(bytecode.m_lhs).jsValue(); |
| JSValue right = GET_C(bytecode.m_rhs).jsValue(); |
| JSValue result = jsRemainder(globalObject, left, right); |
| CHECK_EXCEPTION(); |
| RETURN(result); |
| } |
| |
| SLOW_PATH_DECL(slow_path_pow) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpPow>(); |
| JSValue left = GET_C(bytecode.m_lhs).jsValue(); |
| JSValue right = GET_C(bytecode.m_rhs).jsValue(); |
| JSValue result = jsPow(globalObject, left, right); |
| CHECK_EXCEPTION(); |
| RETURN(result); |
| } |
| |
| SLOW_PATH_DECL(slow_path_lshift) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpLshift>(); |
| JSValue left = GET_C(bytecode.m_lhs).jsValue(); |
| JSValue right = GET_C(bytecode.m_rhs).jsValue(); |
| |
| JSValue result = jsLShift(globalObject, left, right); |
| CHECK_EXCEPTION(); |
| RETURN_PROFILED(result); |
| } |
| |
| SLOW_PATH_DECL(slow_path_rshift) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpRshift>(); |
| JSValue left = GET_C(bytecode.m_lhs).jsValue(); |
| JSValue right = GET_C(bytecode.m_rhs).jsValue(); |
| |
| JSValue result = jsRShift(globalObject, left, right); |
| CHECK_EXCEPTION(); |
| RETURN_PROFILED(result); |
| } |
| |
| SLOW_PATH_DECL(slow_path_urshift) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpUrshift>(); |
| JSValue left = GET_C(bytecode.m_lhs).jsValue(); |
| JSValue right = GET_C(bytecode.m_rhs).jsValue(); |
| |
| JSValue result = jsURShift(globalObject, left, right); |
| CHECK_EXCEPTION(); |
| RETURN(result); |
| } |
| |
| SLOW_PATH_DECL(slow_path_unsigned) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpUnsigned>(); |
| uint32_t a = GET_C(bytecode.m_operand).jsValue().toUInt32(globalObject); |
| RETURN(jsNumber(a)); |
| } |
| |
| SLOW_PATH_DECL(slow_path_bitnot) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpBitnot>(); |
| auto operand = GET_C(bytecode.m_operand).jsValue(); |
| |
| auto result = jsBitwiseNot(globalObject, operand); |
| CHECK_EXCEPTION(); |
| RETURN_PROFILED(result); |
| } |
| |
| SLOW_PATH_DECL(slow_path_bitand) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpBitand>(); |
| auto left = GET_C(bytecode.m_lhs).jsValue(); |
| auto right = GET_C(bytecode.m_rhs).jsValue(); |
| |
| JSValue result = jsBitwiseAnd(globalObject, left, right); |
| CHECK_EXCEPTION(); |
| RETURN_PROFILED(result); |
| } |
| |
| SLOW_PATH_DECL(slow_path_bitor) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpBitor>(); |
| auto left = GET_C(bytecode.m_lhs).jsValue(); |
| auto right = GET_C(bytecode.m_rhs).jsValue(); |
| |
| JSValue result = jsBitwiseOr(globalObject, left, right); |
| CHECK_EXCEPTION(); |
| RETURN_PROFILED(result); |
| } |
| |
| SLOW_PATH_DECL(slow_path_bitxor) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpBitxor>(); |
| auto left = GET_C(bytecode.m_lhs).jsValue(); |
| auto right = GET_C(bytecode.m_rhs).jsValue(); |
| |
| JSValue result = jsBitwiseXor(globalObject, left, right); |
| CHECK_EXCEPTION(); |
| RETURN_PROFILED(result); |
| } |
| |
| SLOW_PATH_DECL(slow_path_typeof) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpTypeof>(); |
| RETURN(jsTypeStringForValue(globalObject, GET_C(bytecode.m_value).jsValue())); |
| } |
| |
| SLOW_PATH_DECL(slow_path_is_object_or_null) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpIsObjectOrNull>(); |
| RETURN(jsBoolean(jsIsObjectTypeOrNull(globalObject, GET_C(bytecode.m_operand).jsValue()))); |
| } |
| |
| SLOW_PATH_DECL(slow_path_is_function) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpIsFunction>(); |
| RETURN(jsBoolean(GET_C(bytecode.m_operand).jsValue().isCallable(vm))); |
| } |
| |
| SLOW_PATH_DECL(slow_path_is_constructor) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpIsConstructor>(); |
| RETURN(jsBoolean(GET_C(bytecode.m_operand).jsValue().isConstructor(vm))); |
| } |
| |
| SLOW_PATH_DECL(slow_path_in_by_val) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpInByVal>(); |
| auto& metadata = bytecode.metadata(codeBlock); |
| RETURN(jsBoolean(CommonSlowPaths::opInByVal(globalObject, GET_C(bytecode.m_base).jsValue(), GET_C(bytecode.m_property).jsValue(), &metadata.m_arrayProfile))); |
| } |
| |
| SLOW_PATH_DECL(slow_path_in_by_id) |
| { |
| BEGIN(); |
| |
| auto bytecode = pc->as<OpInById>(); |
| JSValue baseValue = GET_C(bytecode.m_base).jsValue(); |
| if (!baseValue.isObject()) |
| THROW(createInvalidInParameterError(globalObject, baseValue)); |
| |
| RETURN(jsBoolean(asObject(baseValue)->hasProperty(globalObject, codeBlock->identifier(bytecode.m_property)))); |
| } |
| |
| template<OpcodeSize width> |
| SlowPathReturnType SLOW_PATH iterator_open_try_fast(CallFrame* callFrame, const Instruction* pc) |
| { |
| // Don't set PC; we can't throw and it's relatively slow. |
| BEGIN_NO_SET_PC(); |
| |
| auto bytecode = pc->asKnownWidth<OpIteratorOpen, width>(); |
| auto& metadata = bytecode.metadata(codeBlock); |
| JSValue iterable = GET_C(bytecode.m_iterable).jsValue(); |
| PROFILE_VALUE_IN(iterable, m_iterableProfile); |
| JSValue symbolIterator = GET_C(bytecode.m_symbolIterator).jsValue(); |
| auto& iterator = GET(bytecode.m_iterator); |
| |
| auto prepareForFastArrayIteration = [&] { |
| if (!globalObject->arrayIteratorProtocolWatchpointSet().isStillValid()) |
| return IterationMode::Generic; |
| |
| // This is correct because we just checked the watchpoint is still valid. |
| JSFunction* symbolIteratorFunction = jsDynamicCast<JSFunction*>(vm, symbolIterator); |
| if (!symbolIteratorFunction) |
| return IterationMode::Generic; |
| |
| // We don't want to allocate the values function just to check if it's the same as our function at so we use the concurrent accessor. |
| // FIXME: This only works for arrays from the same global object as ourselves but we should be able to support any pairing. |
| if (globalObject->arrayProtoValuesFunctionConcurrently() != symbolIteratorFunction) |
| return IterationMode::Generic; |
| |
| // We should be good to go. |
| metadata.m_iterationMetadata.seenModes = metadata.m_iterationMetadata.seenModes | IterationMode::FastArray; |
| GET(bytecode.m_next) = JSValue(); |
| auto* iteratedObject = jsCast<JSObject*>(iterable); |
| iterator = JSArrayIterator::create(vm, globalObject->arrayIteratorStructure(), iteratedObject, IterationKind::Values); |
| PROFILE_VALUE_IN(iterator.jsValue(), m_iteratorProfile); |
| return IterationMode::FastArray; |
| }; |
| |
| if (iterable.inherits<JSArray>(vm)) { |
| if (prepareForFastArrayIteration() == IterationMode::FastArray) |
| return encodeResult(pc, reinterpret_cast<void*>(IterationMode::FastArray)); |
| } |
| |
| // Return to the bytecode to try in generic mode. |
| metadata.m_iterationMetadata.seenModes = metadata.m_iterationMetadata.seenModes | IterationMode::Generic; |
| return encodeResult(pc, reinterpret_cast<void*>(IterationMode::Generic)); |
| } |
| |
| SLOW_PATH_DECL(iterator_open_try_fast_narrow) |
| { |
| return iterator_open_try_fast<Narrow>(callFrame, pc); |
| } |
| |
| SLOW_PATH_DECL(iterator_open_try_fast_wide16) |
| { |
| return iterator_open_try_fast<Wide16>(callFrame, pc); |
| } |
| |
| SLOW_PATH_DECL(iterator_open_try_fast_wide32) |
| { |
| return iterator_open_try_fast<Wide32>(callFrame, pc); |
| } |
| |
| template<OpcodeSize width> |
| SlowPathReturnType SLOW_PATH iterator_next_try_fast(CallFrame* callFrame, const Instruction* pc) |
| { |
| BEGIN(); |
| |
| auto bytecode = pc->asKnownWidth<OpIteratorNext, width>(); |
| auto& metadata = bytecode.metadata(codeBlock); |
| |
| ASSERT(!GET(bytecode.m_next).jsValue()); |
| JSObject* iterator = jsCast<JSObject*>(GET(bytecode.m_iterator).jsValue());; |
| JSCell* iterable = GET(bytecode.m_iterable).jsValue().asCell(); |
| if (auto arrayIterator = jsDynamicCast<JSArrayIterator*>(vm, iterator)) { |
| if (auto array = jsDynamicCast<JSArray*>(vm, iterable)) { |
| metadata.m_iterableProfile.observeStructureID(array->structureID()); |
| |
| metadata.m_iterationMetadata.seenModes = metadata.m_iterationMetadata.seenModes | IterationMode::FastArray; |
| auto& indexSlot = arrayIterator->internalField(JSArrayIterator::Field::Index); |
| int64_t index = indexSlot.get().asAnyInt(); |
| ASSERT(0 <= index && index <= maxSafeInteger()); |
| |
| JSValue value; |
| bool done = index == JSArrayIterator::doneIndex || index >= array->length(); |
| GET(bytecode.m_done) = jsBoolean(done); |
| if (!done) { |
| // No need for a barrier here because we know this is a primitive. |
| indexSlot.setWithoutWriteBarrier(jsNumber(index + 1)); |
| ASSERT(index == static_cast<unsigned>(index)); |
| value = array->getIndex(globalObject, static_cast<unsigned>(index)); |
| CHECK_EXCEPTION(); |
| PROFILE_VALUE_IN(value, m_valueProfile); |
| } else { |
| // No need for a barrier here because we know this is a primitive. |
| indexSlot.setWithoutWriteBarrier(jsNumber(-1)); |
| } |
| |
| GET(bytecode.m_value) = value; |
| return encodeResult(pc, reinterpret_cast<void*>(IterationMode::FastArray)); |
| } |
| } |
| RELEASE_ASSERT_NOT_REACHED(); |
| } |
| |
| SLOW_PATH_DECL(iterator_next_try_fast_narrow) |
| { |
| return iterator_next_try_fast<Narrow>(callFrame, pc); |
| } |
| |
| SLOW_PATH_DECL(iterator_next_try_fast_wide16) |
| { |
| return iterator_next_try_fast<Wide16>(callFrame, pc); |
| } |
| |
| SLOW_PATH_DECL(iterator_next_try_fast_wide32) |
| { |
| return iterator_next_try_fast<Wide32>(callFrame, pc); |
| } |
| |
| SLOW_PATH_DECL(slow_path_del_by_val) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpDelByVal>(); |
| JSValue baseValue = GET_C(bytecode.m_base).jsValue(); |
| JSObject* baseObject = baseValue.toObject(globalObject); |
| CHECK_EXCEPTION(); |
| |
| JSValue subscript = GET_C(bytecode.m_property).jsValue(); |
| |
| bool couldDelete; |
| |
| uint32_t i; |
| if (subscript.getUInt32(i)) |
| couldDelete = baseObject->methodTable(vm)->deletePropertyByIndex(baseObject, globalObject, i); |
| else { |
| CHECK_EXCEPTION(); |
| auto property = subscript.toPropertyKey(globalObject); |
| CHECK_EXCEPTION(); |
| couldDelete = JSCell::deleteProperty(baseObject, globalObject, property); |
| } |
| CHECK_EXCEPTION(); |
| |
| if (!couldDelete && bytecode.m_ecmaMode.isStrict()) |
| THROW(createTypeError(globalObject, UnableToDeletePropertyError)); |
| |
| RETURN(jsBoolean(couldDelete)); |
| } |
| |
| SLOW_PATH_DECL(slow_path_strcat) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpStrcat>(); |
| RETURN(jsStringFromRegisterArray(globalObject, &GET(bytecode.m_src), bytecode.m_count)); |
| } |
| |
| SLOW_PATH_DECL(slow_path_to_primitive) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpToPrimitive>(); |
| RETURN(GET_C(bytecode.m_src).jsValue().toPrimitive(globalObject)); |
| } |
| |
| SLOW_PATH_DECL(slow_path_enter) |
| { |
| BEGIN(); |
| Heap::heap(codeBlock)->writeBarrier(codeBlock); |
| END(); |
| } |
| |
| SLOW_PATH_DECL(slow_path_to_property_key) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpToPropertyKey>(); |
| RETURN(GET_C(bytecode.m_src).jsValue().toPropertyKeyValue(globalObject)); |
| } |
| |
| SLOW_PATH_DECL(slow_path_get_enumerable_length) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpGetEnumerableLength>(); |
| JSValue enumeratorValue = GET_C(bytecode.m_base).jsValue(); |
| if (enumeratorValue.isUndefinedOrNull()) |
| RETURN(jsNumber(0)); |
| |
| JSPropertyNameEnumerator* enumerator = jsCast<JSPropertyNameEnumerator*>(enumeratorValue.asCell()); |
| |
| RETURN(jsNumber(enumerator->indexedLength())); |
| } |
| |
| SLOW_PATH_DECL(slow_path_has_indexed_property) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpHasIndexedProperty>(); |
| auto& metadata = bytecode.metadata(codeBlock); |
| JSObject* base = GET_C(bytecode.m_base).jsValue().toObject(globalObject); |
| CHECK_EXCEPTION(); |
| JSValue property = GET(bytecode.m_property).jsValue(); |
| metadata.m_arrayProfile.observeStructure(base->structure(vm)); |
| ASSERT(property.isUInt32AsAnyInt()); |
| RETURN(jsBoolean(base->hasPropertyGeneric(globalObject, property.asUInt32AsAnyInt(), PropertySlot::InternalMethodType::GetOwnProperty))); |
| } |
| |
| SLOW_PATH_DECL(slow_path_has_structure_property) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpHasStructureProperty>(); |
| JSObject* base = GET_C(bytecode.m_base).jsValue().toObject(globalObject); |
| CHECK_EXCEPTION(); |
| JSValue property = GET(bytecode.m_property).jsValue(); |
| RELEASE_ASSERT(property.isString()); |
| #if USE(JSVALUE32_64) |
| JSPropertyNameEnumerator* enumerator = jsCast<JSPropertyNameEnumerator*>(GET(bytecode.m_enumerator).jsValue().asCell()); |
| if (base->structure(vm)->id() == enumerator->cachedStructureID()) |
| RETURN(jsBoolean(true)); |
| #endif |
| JSString* string = asString(property); |
| auto propertyName = string->toIdentifier(globalObject); |
| CHECK_EXCEPTION(); |
| RETURN(jsBoolean(base->hasPropertyGeneric(globalObject, propertyName, PropertySlot::InternalMethodType::GetOwnProperty))); |
| } |
| |
| SLOW_PATH_DECL(slow_path_has_own_structure_property) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpHasOwnStructureProperty>(); |
| JSValue base = GET_C(bytecode.m_base).jsValue(); |
| |
| #if USE(JSVALUE32_64) |
| JSPropertyNameEnumerator* enumerator = jsCast<JSPropertyNameEnumerator*>(GET(bytecode.m_enumerator).jsValue().asCell()); |
| if (base.isCell() && base.asCell()->structure(vm)->id() == enumerator->cachedStructureID()) |
| RETURN(jsBoolean(true)); |
| #endif |
| |
| JSValue property = GET(bytecode.m_property).jsValue(); |
| RELEASE_ASSERT(property.isString()); |
| JSString* string = asString(property); |
| auto propertyName = string->toIdentifier(globalObject); |
| CHECK_EXCEPTION(); |
| |
| RETURN(jsBoolean(objectPrototypeHasOwnProperty(globalObject, base, propertyName))); |
| } |
| |
| SLOW_PATH_DECL(slow_path_in_structure_property) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpInStructureProperty>(); |
| JSValue base = GET_C(bytecode.m_base).jsValue(); |
| #if USE(JSVALUE32_64) |
| JSPropertyNameEnumerator* enumerator = jsCast<JSPropertyNameEnumerator*>(GET(bytecode.m_enumerator).jsValue().asCell()); |
| if (base.isCell() && base.asCell()->structure(vm)->id() == enumerator->cachedStructureID()) |
| RETURN(jsBoolean(true)); |
| #endif |
| JSValue property = GET(bytecode.m_property).jsValue(); |
| RELEASE_ASSERT(property.isString()); |
| RETURN(jsBoolean(CommonSlowPaths::opInByVal(globalObject, base, asString(property)))); |
| } |
| |
| SLOW_PATH_DECL(slow_path_has_generic_property) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpHasGenericProperty>(); |
| JSObject* base = GET_C(bytecode.m_base).jsValue().toObject(globalObject); |
| CHECK_EXCEPTION(); |
| JSValue property = GET(bytecode.m_property).jsValue(); |
| ASSERT(property.isString()); |
| JSString* string = asString(property); |
| auto propertyName = string->toIdentifier(globalObject); |
| CHECK_EXCEPTION(); |
| RETURN(jsBoolean(base->hasPropertyGeneric(globalObject, propertyName, PropertySlot::InternalMethodType::GetOwnProperty))); |
| } |
| |
| SLOW_PATH_DECL(slow_path_get_direct_pname) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpGetDirectPname>(); |
| JSValue baseValue = GET_C(bytecode.m_base).jsValue(); |
| JSValue property = GET(bytecode.m_property).jsValue(); |
| ASSERT(property.isString()); |
| JSString* string = asString(property); |
| auto propertyName = string->toIdentifier(globalObject); |
| CHECK_EXCEPTION(); |
| RETURN(baseValue.get(globalObject, propertyName)); |
| } |
| |
| SLOW_PATH_DECL(slow_path_get_property_enumerator) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpGetPropertyEnumerator>(); |
| JSValue baseValue = GET_C(bytecode.m_base).jsValue(); |
| if (baseValue.isUndefinedOrNull()) |
| RETURN(vm.emptyPropertyNameEnumerator()); |
| |
| JSObject* base = baseValue.toObject(globalObject); |
| CHECK_EXCEPTION(); |
| |
| RETURN(propertyNameEnumerator(globalObject, base)); |
| } |
| |
| SLOW_PATH_DECL(slow_path_enumerator_structure_pname) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpEnumeratorStructurePname>(); |
| JSPropertyNameEnumerator* enumerator = jsCast<JSPropertyNameEnumerator*>(GET(bytecode.m_enumerator).jsValue().asCell()); |
| uint32_t index = GET(bytecode.m_index).jsValue().asUInt32(); |
| |
| JSString* propertyName = nullptr; |
| if (index < enumerator->endStructurePropertyIndex()) |
| propertyName = enumerator->propertyNameAtIndex(index); |
| RETURN(propertyName ? propertyName : jsNull()); |
| } |
| |
| SLOW_PATH_DECL(slow_path_enumerator_generic_pname) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpEnumeratorGenericPname>(); |
| JSPropertyNameEnumerator* enumerator = jsCast<JSPropertyNameEnumerator*>(GET(bytecode.m_enumerator).jsValue().asCell()); |
| uint32_t index = GET(bytecode.m_index).jsValue().asUInt32(); |
| |
| JSString* propertyName = nullptr; |
| if (enumerator->endStructurePropertyIndex() <= index && index < enumerator->endGenericPropertyIndex()) |
| propertyName = enumerator->propertyNameAtIndex(index); |
| RETURN(propertyName ? propertyName : jsNull()); |
| } |
| |
| SLOW_PATH_DECL(slow_path_to_index_string) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpToIndexString>(); |
| JSValue indexValue = GET(bytecode.m_index).jsValue(); |
| ASSERT(indexValue.isUInt32AsAnyInt()); |
| RETURN(jsString(vm, Identifier::from(vm, indexValue.asUInt32AsAnyInt()).string())); |
| } |
| |
| SLOW_PATH_DECL(slow_path_profile_type_clear_log) |
| { |
| BEGIN(); |
| vm.typeProfilerLog()->processLogEntries(vm, "LLInt log full."_s); |
| END(); |
| } |
| |
| SLOW_PATH_DECL(slow_path_unreachable) |
| { |
| BEGIN(); |
| UNREACHABLE_FOR_PLATFORM(); |
| END(); |
| } |
| |
| SLOW_PATH_DECL(slow_path_create_lexical_environment) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpCreateLexicalEnvironment>(); |
| JSScope* currentScope = callFrame->uncheckedR(bytecode.m_scope).Register::scope(); |
| SymbolTable* symbolTable = jsCast<SymbolTable*>(GET_C(bytecode.m_symbolTable).jsValue()); |
| JSValue initialValue = GET_C(bytecode.m_initialValue).jsValue(); |
| ASSERT(initialValue == jsUndefined() || initialValue == jsTDZValue()); |
| JSScope* newScope = JSLexicalEnvironment::create(vm, globalObject, currentScope, symbolTable, initialValue); |
| RETURN(newScope); |
| } |
| |
| SLOW_PATH_DECL(slow_path_push_with_scope) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpPushWithScope>(); |
| JSObject* newScope = GET_C(bytecode.m_newScope).jsValue().toObject(globalObject); |
| CHECK_EXCEPTION(); |
| |
| JSScope* currentScope = callFrame->uncheckedR(bytecode.m_currentScope).Register::scope(); |
| RETURN(JSWithScope::create(vm, globalObject, currentScope, newScope)); |
| } |
| |
| SLOW_PATH_DECL(slow_path_resolve_scope_for_hoisting_func_decl_in_eval) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpResolveScopeForHoistingFuncDeclInEval>(); |
| const Identifier& ident = codeBlock->identifier(bytecode.m_property); |
| JSScope* scope = callFrame->uncheckedR(bytecode.m_scope).Register::scope(); |
| JSValue resolvedScope = JSScope::resolveScopeForHoistingFuncDeclInEval(globalObject, scope, ident); |
| |
| CHECK_EXCEPTION(); |
| |
| RETURN(resolvedScope); |
| } |
| |
| SLOW_PATH_DECL(slow_path_resolve_scope) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpResolveScope>(); |
| auto& metadata = bytecode.metadata(codeBlock); |
| const Identifier& ident = codeBlock->identifier(bytecode.m_var); |
| JSScope* scope = callFrame->uncheckedR(bytecode.m_scope).Register::scope(); |
| JSObject* resolvedScope = JSScope::resolve(globalObject, scope, ident); |
| // Proxy can throw an error here, e.g. Proxy in with statement's @unscopables. |
| CHECK_EXCEPTION(); |
| |
| ResolveType resolveType = metadata.m_resolveType; |
| |
| // ModuleVar does not keep the scope register value alive in DFG. |
| ASSERT(resolveType != ModuleVar); |
| |
| switch (resolveType) { |
| case GlobalProperty: |
| case GlobalPropertyWithVarInjectionChecks: |
| case UnresolvedProperty: |
| case UnresolvedPropertyWithVarInjectionChecks: { |
| if (resolvedScope->isGlobalObject()) { |
| JSGlobalObject* globalObject = jsCast<JSGlobalObject*>(resolvedScope); |
| bool hasProperty = globalObject->hasProperty(globalObject, ident); |
| CHECK_EXCEPTION(); |
| if (hasProperty) { |
| ConcurrentJSLocker locker(codeBlock->m_lock); |
| metadata.m_resolveType = needsVarInjectionChecks(resolveType) ? GlobalPropertyWithVarInjectionChecks : GlobalProperty; |
| metadata.m_globalObject.set(vm, codeBlock, globalObject); |
| metadata.m_globalLexicalBindingEpoch = globalObject->globalLexicalBindingEpoch(); |
| } |
| } else if (resolvedScope->isGlobalLexicalEnvironment()) { |
| JSGlobalLexicalEnvironment* globalLexicalEnvironment = jsCast<JSGlobalLexicalEnvironment*>(resolvedScope); |
| ConcurrentJSLocker locker(codeBlock->m_lock); |
| metadata.m_resolveType = needsVarInjectionChecks(resolveType) ? GlobalLexicalVarWithVarInjectionChecks : GlobalLexicalVar; |
| metadata.m_globalLexicalEnvironment.set(vm, codeBlock, globalLexicalEnvironment); |
| } |
| break; |
| } |
| default: |
| break; |
| } |
| |
| RETURN(resolvedScope); |
| } |
| |
| SLOW_PATH_DECL(slow_path_create_rest) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpCreateRest>(); |
| unsigned arraySize = GET_C(bytecode.m_arraySize).jsValue().asUInt32(); |
| Structure* structure = globalObject->restParameterStructure(); |
| unsigned numParamsToSkip = bytecode.m_numParametersToSkip; |
| JSValue* argumentsToCopyRegion = callFrame->addressOfArgumentsStart() + numParamsToSkip; |
| RETURN(constructArray(globalObject, structure, argumentsToCopyRegion, arraySize)); |
| } |
| |
| SLOW_PATH_DECL(slow_path_get_by_id_with_this) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpGetByIdWithThis>(); |
| const Identifier& ident = codeBlock->identifier(bytecode.m_property); |
| JSValue baseValue = GET_C(bytecode.m_base).jsValue(); |
| JSValue thisVal = GET_C(bytecode.m_thisValue).jsValue(); |
| PropertySlot slot(thisVal, PropertySlot::PropertySlot::InternalMethodType::Get); |
| JSValue result = baseValue.get(globalObject, ident, slot); |
| RETURN_PROFILED(result); |
| } |
| |
| SLOW_PATH_DECL(slow_path_get_by_val_with_this) |
| { |
| BEGIN(); |
| |
| auto bytecode = pc->as<OpGetByValWithThis>(); |
| JSValue baseValue = GET_C(bytecode.m_base).jsValue(); |
| JSValue thisValue = GET_C(bytecode.m_thisValue).jsValue(); |
| JSValue subscript = GET_C(bytecode.m_property).jsValue(); |
| |
| if (LIKELY(baseValue.isCell() && subscript.isString())) { |
| Structure& structure = *baseValue.asCell()->structure(vm); |
| if (JSCell::canUseFastGetOwnProperty(structure)) { |
| RefPtr<AtomStringImpl> existingAtomString = asString(subscript)->toExistingAtomString(globalObject); |
| CHECK_EXCEPTION(); |
| if (existingAtomString) { |
| if (JSValue result = baseValue.asCell()->fastGetOwnProperty(vm, structure, existingAtomString.get())) |
| RETURN_PROFILED(result); |
| } |
| } |
| } |
| |
| PropertySlot slot(thisValue, PropertySlot::PropertySlot::InternalMethodType::Get); |
| if (subscript.isUInt32()) { |
| uint32_t i = subscript.asUInt32(); |
| if (isJSString(baseValue) && asString(baseValue)->canGetIndex(i)) |
| RETURN_PROFILED(asString(baseValue)->getIndex(globalObject, i)); |
| |
| RETURN_PROFILED(baseValue.get(globalObject, i, slot)); |
| } |
| |
| baseValue.requireObjectCoercible(globalObject); |
| CHECK_EXCEPTION(); |
| auto property = subscript.toPropertyKey(globalObject); |
| CHECK_EXCEPTION(); |
| RETURN_PROFILED(baseValue.get(globalObject, property, slot)); |
| } |
| |
| SLOW_PATH_DECL(slow_path_get_private_name) |
| { |
| BEGIN(); |
| |
| auto bytecode = pc->as<OpGetPrivateName>(); |
| JSValue baseValue = GET_C(bytecode.m_base).jsValue(); |
| JSValue subscript = GET_C(bytecode.m_property).jsValue(); |
| ASSERT(subscript.isSymbol()); |
| |
| baseValue.requireObjectCoercible(globalObject); |
| CHECK_EXCEPTION(); |
| auto property = subscript.toPropertyKey(globalObject); |
| CHECK_EXCEPTION(); |
| ASSERT(property.isPrivateName()); |
| |
| PropertySlot slot(baseValue, PropertySlot::InternalMethodType::GetOwnProperty); |
| asObject(baseValue)->getPrivateField(globalObject, property, slot); |
| CHECK_EXCEPTION(); |
| |
| RETURN_PROFILED(slot.getValue(globalObject, property)); |
| } |
| |
| SLOW_PATH_DECL(slow_path_get_prototype_of) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpGetPrototypeOf>(); |
| JSValue value = GET_C(bytecode.m_value).jsValue(); |
| RETURN_PROFILED(value.getPrototype(globalObject)); |
| } |
| |
| SLOW_PATH_DECL(slow_path_put_by_id_with_this) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpPutByIdWithThis>(); |
| const Identifier& ident = codeBlock->identifier(bytecode.m_property); |
| JSValue baseValue = GET_C(bytecode.m_base).jsValue(); |
| JSValue thisVal = GET_C(bytecode.m_thisValue).jsValue(); |
| JSValue putValue = GET_C(bytecode.m_value).jsValue(); |
| PutPropertySlot slot(thisVal, bytecode.m_ecmaMode.isStrict(), codeBlock->putByIdContext()); |
| baseValue.putInline(globalObject, ident, putValue, slot); |
| END(); |
| } |
| |
| SLOW_PATH_DECL(slow_path_put_by_val_with_this) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpPutByValWithThis>(); |
| JSValue baseValue = GET_C(bytecode.m_base).jsValue(); |
| JSValue thisValue = GET_C(bytecode.m_thisValue).jsValue(); |
| JSValue subscript = GET_C(bytecode.m_property).jsValue(); |
| JSValue value = GET_C(bytecode.m_value).jsValue(); |
| |
| auto property = subscript.toPropertyKey(globalObject); |
| CHECK_EXCEPTION(); |
| PutPropertySlot slot(thisValue, bytecode.m_ecmaMode.isStrict()); |
| baseValue.put(globalObject, property, value, slot); |
| END(); |
| } |
| |
| SLOW_PATH_DECL(slow_path_define_data_property) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpDefineDataProperty>(); |
| JSObject* base = asObject(GET_C(bytecode.m_base).jsValue()); |
| JSValue property = GET_C(bytecode.m_property).jsValue(); |
| JSValue value = GET_C(bytecode.m_value).jsValue(); |
| JSValue attributes = GET_C(bytecode.m_attributes).jsValue(); |
| ASSERT(attributes.isInt32()); |
| |
| auto propertyName = property.toPropertyKey(globalObject); |
| CHECK_EXCEPTION(); |
| PropertyDescriptor descriptor = toPropertyDescriptor(value, jsUndefined(), jsUndefined(), DefinePropertyAttributes(attributes.asInt32())); |
| ASSERT((descriptor.attributes() & PropertyAttribute::Accessor) || (!descriptor.isAccessorDescriptor())); |
| base->methodTable(vm)->defineOwnProperty(base, globalObject, propertyName, descriptor, true); |
| END(); |
| } |
| |
| SLOW_PATH_DECL(slow_path_define_accessor_property) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpDefineAccessorProperty>(); |
| JSObject* base = asObject(GET_C(bytecode.m_base).jsValue()); |
| JSValue property = GET_C(bytecode.m_property).jsValue(); |
| JSValue getter = GET_C(bytecode.m_getter).jsValue(); |
| JSValue setter = GET_C(bytecode.m_setter).jsValue(); |
| JSValue attributes = GET_C(bytecode.m_attributes).jsValue(); |
| ASSERT(attributes.isInt32()); |
| |
| auto propertyName = property.toPropertyKey(globalObject); |
| CHECK_EXCEPTION(); |
| PropertyDescriptor descriptor = toPropertyDescriptor(jsUndefined(), getter, setter, DefinePropertyAttributes(attributes.asInt32())); |
| ASSERT((descriptor.attributes() & PropertyAttribute::Accessor) || (!descriptor.isAccessorDescriptor())); |
| base->methodTable(vm)->defineOwnProperty(base, globalObject, propertyName, descriptor, true); |
| END(); |
| } |
| |
| SLOW_PATH_DECL(slow_path_throw_static_error) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpThrowStaticError>(); |
| JSValue errorMessageValue = GET_C(bytecode.m_message).jsValue(); |
| RELEASE_ASSERT(errorMessageValue.isString()); |
| String errorMessage = asString(errorMessageValue)->value(globalObject); |
| ErrorTypeWithExtension errorType = bytecode.m_errorType; |
| THROW(createError(globalObject, errorType, errorMessage)); |
| } |
| |
| SLOW_PATH_DECL(slow_path_new_array_with_spread) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpNewArrayWithSpread>(); |
| int numItems = bytecode.m_argc; |
| ASSERT(numItems >= 0); |
| const BitVector& bitVector = codeBlock->unlinkedCodeBlock()->bitVector(bytecode.m_bitVector); |
| |
| JSValue* values = bitwise_cast<JSValue*>(&GET(bytecode.m_argv)); |
| |
| if (numItems == 1 && bitVector.get(0)) { |
| Structure* structure = globalObject->arrayStructureForIndexingTypeDuringAllocation(CopyOnWriteArrayWithContiguous); |
| if (isCopyOnWrite(structure->indexingMode())) { |
| JSArray* result = CommonSlowPaths::allocateNewArrayBuffer(vm, structure, jsCast<JSImmutableButterfly*>(values[0])); |
| RETURN(result); |
| } |
| } |
| |
| Checked<unsigned, RecordOverflow> checkedArraySize = 0; |
| for (int i = 0; i < numItems; i++) { |
| if (bitVector.get(i)) { |
| JSValue value = values[-i]; |
| JSImmutableButterfly* array = jsCast<JSImmutableButterfly*>(value); |
| checkedArraySize += array->publicLength(); |
| } else |
| checkedArraySize += 1; |
| } |
| if (UNLIKELY(checkedArraySize.hasOverflowed())) |
| THROW(createOutOfMemoryError(globalObject)); |
| |
| unsigned arraySize = checkedArraySize.unsafeGet(); |
| if (UNLIKELY(arraySize >= MIN_ARRAY_STORAGE_CONSTRUCTION_LENGTH)) |
| THROW(createOutOfMemoryError(globalObject)); |
| |
| Structure* structure = globalObject->arrayStructureForIndexingTypeDuringAllocation(ArrayWithContiguous); |
| |
| JSArray* result = JSArray::tryCreate(vm, structure, arraySize); |
| if (UNLIKELY(!result)) |
| THROW(createOutOfMemoryError(globalObject)); |
| CHECK_EXCEPTION(); |
| |
| unsigned index = 0; |
| for (int i = 0; i < numItems; i++) { |
| JSValue value = values[-i]; |
| if (bitVector.get(i)) { |
| // We are spreading. |
| JSImmutableButterfly* array = jsCast<JSImmutableButterfly*>(value); |
| for (unsigned i = 0; i < array->publicLength(); i++) { |
| RELEASE_ASSERT(array->get(i)); |
| result->putDirectIndex(globalObject, index, array->get(i)); |
| CHECK_EXCEPTION(); |
| ++index; |
| } |
| } else { |
| // We are not spreading. |
| result->putDirectIndex(globalObject, index, value); |
| CHECK_EXCEPTION(); |
| ++index; |
| } |
| } |
| |
| RETURN(result); |
| } |
| |
| SLOW_PATH_DECL(slow_path_new_array_buffer) |
| { |
| BEGIN(); |
| auto bytecode = pc->as<OpNewArrayBuffer>(); |
| ASSERT(bytecode.m_immutableButterfly.isConstant()); |
| JSImmutableButterfly* immutableButterfly = bitwise_cast<JSImmutableButterfly*>(GET_C(bytecode.m_immutableButterfly).jsValue().asCell()); |
| auto& profile = bytecode.metadata(codeBlock).m_arrayAllocationProfile; |
| |
| IndexingType indexingMode = profile.selectIndexingType(); |
| Structure* structure = globalObject->arrayStructureForIndexingTypeDuringAllocation(indexingMode); |
| ASSERT(isCopyOnWrite(indexingMode)); |
| ASSERT(!structure->outOfLineCapacity()); |
| |
| if (UNLIKELY(immutableButterfly->indexingMode() != indexingMode)) { |
| auto* newButterfly = JSImmutableButterfly::create(vm, indexingMode, immutableButterfly->length()); |
| for (unsigned i = 0; i < immutableButterfly->length(); ++i) |
| newButterfly->setIndex(vm, i, immutableButterfly->get(i)); |
| immutableButterfly = newButterfly; |
| |
| // FIXME: This is kinda gross and only works because we can't inline new_array_bufffer in the baseline. |
| // We also cannot allocate a new butterfly from compilation threads since it's invalid to allocate cells from |
| // a compilation thread. |
| WTF::storeStoreFence(); |
| codeBlock->constantRegister(bytecode.m_immutableButterfly).set(vm, codeBlock, immutableButterfly); |
| WTF::storeStoreFence(); |
| } |
| |
| JSArray* result = CommonSlowPaths::allocateNewArrayBuffer(vm, structure, immutableButterfly); |
| ASSERT(isCopyOnWrite(result->indexingMode()) || globalObject->isHavingABadTime()); |
| ArrayAllocationProfile::updateLastAllocationFor(&profile, result); |
| RETURN(result); |
| } |
| |
| SLOW_PATH_DECL(slow_path_spread) |
| { |
| BEGIN(); |
| |
| auto bytecode = pc->as<OpSpread>(); |
| JSValue iterable = GET_C(bytecode.m_argument).jsValue(); |
| |
| if (iterable.isCell() && isJSArray(iterable.asCell())) { |
| JSArray* array = jsCast<JSArray*>(iterable); |
| if (array->isIteratorProtocolFastAndNonObservable()) { |
| // JSImmutableButterfly::createFromArray does not consult the prototype chain, |
| // so we must be sure that not consulting the prototype chain would |
| // produce the same value during iteration. |
| RETURN(JSImmutableButterfly::createFromArray(globalObject, vm, array)); |
| } |
| } |
| |
| JSArray* array; |
| { |
| JSFunction* iterationFunction = globalObject->iteratorProtocolFunction(); |
| auto callData = getCallData(vm, iterationFunction); |
| ASSERT(callData.type != CallData::Type::None); |
| |
| MarkedArgumentBuffer arguments; |
| arguments.append(iterable); |
| ASSERT(!arguments.hasOverflowed()); |
| JSValue arrayResult = call(globalObject, iterationFunction, callData, jsNull(), arguments); |
| CHECK_EXCEPTION(); |
| array = jsCast<JSArray*>(arrayResult); |
| } |
| |
| RETURN(JSImmutableButterfly::createFromArray(globalObject, vm, array)); |
| } |
| |
| } // namespace JSC |
