| // Copyright 2017 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "src/api/api.h" |
| #include "src/builtins/builtins-utils-gen.h" |
| #include "src/builtins/builtins.h" |
| #include "src/codegen/code-stub-assembler.h" |
| #include "src/codegen/macro-assembler.h" |
| #include "src/execution/frame-constants.h" |
| #include "src/heap/memory-chunk.h" |
| #include "src/ic/accessor-assembler.h" |
| #include "src/ic/keyed-store-generic.h" |
| #include "src/logging/counters.h" |
| #include "src/objects/debug-objects.h" |
| #include "src/objects/shared-function-info.h" |
| #include "src/runtime/runtime.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // ----------------------------------------------------------------------------- |
| // Stack checks. |
| |
| void Builtins::Generate_StackCheck(MacroAssembler* masm) { |
| masm->TailCallRuntime(Runtime::kStackGuard); |
| } |
| |
| // ----------------------------------------------------------------------------- |
| // TurboFan support builtins. |
| |
| TF_BUILTIN(CopyFastSmiOrObjectElements, CodeStubAssembler) { |
| auto js_object = Parameter<JSObject>(Descriptor::kObject); |
| |
| // Load the {object}s elements. |
| TNode<FixedArrayBase> source = |
| CAST(LoadObjectField(js_object, JSObject::kElementsOffset)); |
| TNode<FixedArrayBase> target = |
| CloneFixedArray(source, ExtractFixedArrayFlag::kFixedArrays); |
| StoreObjectField(js_object, JSObject::kElementsOffset, target); |
| Return(target); |
| } |
| |
| TF_BUILTIN(GrowFastDoubleElements, CodeStubAssembler) { |
| auto object = Parameter<JSObject>(Descriptor::kObject); |
| auto key = Parameter<Smi>(Descriptor::kKey); |
| |
| Label runtime(this, Label::kDeferred); |
| TNode<FixedArrayBase> elements = LoadElements(object); |
| elements = TryGrowElementsCapacity(object, elements, PACKED_DOUBLE_ELEMENTS, |
| key, &runtime); |
| Return(elements); |
| |
| BIND(&runtime); |
| TailCallRuntime(Runtime::kGrowArrayElements, NoContextConstant(), object, |
| key); |
| } |
| |
| TF_BUILTIN(GrowFastSmiOrObjectElements, CodeStubAssembler) { |
| auto object = Parameter<JSObject>(Descriptor::kObject); |
| auto key = Parameter<Smi>(Descriptor::kKey); |
| |
| Label runtime(this, Label::kDeferred); |
| TNode<FixedArrayBase> elements = LoadElements(object); |
| elements = |
| TryGrowElementsCapacity(object, elements, PACKED_ELEMENTS, key, &runtime); |
| Return(elements); |
| |
| BIND(&runtime); |
| TailCallRuntime(Runtime::kGrowArrayElements, NoContextConstant(), object, |
| key); |
| } |
| |
| TF_BUILTIN(ReturnReceiver, CodeStubAssembler) { |
| auto receiver = Parameter<Object>(Descriptor::kReceiver); |
| Return(receiver); |
| } |
| |
| TF_BUILTIN(DebugBreakTrampoline, CodeStubAssembler) { |
| Label tailcall_to_shared(this); |
| auto context = Parameter<Context>(Descriptor::kContext); |
| auto new_target = Parameter<Object>(Descriptor::kJSNewTarget); |
| auto arg_count = |
| UncheckedParameter<Int32T>(Descriptor::kJSActualArgumentsCount); |
| auto function = Parameter<JSFunction>(Descriptor::kJSTarget); |
| |
| // Check break-at-entry flag on the debug info. |
| TNode<SharedFunctionInfo> shared = |
| CAST(LoadObjectField(function, JSFunction::kSharedFunctionInfoOffset)); |
| TNode<Object> maybe_heap_object_or_smi = |
| LoadObjectField(shared, SharedFunctionInfo::kScriptOrDebugInfoOffset); |
| TNode<HeapObject> maybe_debug_info = |
| TaggedToHeapObject(maybe_heap_object_or_smi, &tailcall_to_shared); |
| GotoIfNot(HasInstanceType(maybe_debug_info, InstanceType::DEBUG_INFO_TYPE), |
| &tailcall_to_shared); |
| |
| { |
| TNode<DebugInfo> debug_info = CAST(maybe_debug_info); |
| TNode<Smi> flags = |
| CAST(LoadObjectField(debug_info, DebugInfo::kFlagsOffset)); |
| GotoIfNot(SmiToInt32(SmiAnd(flags, SmiConstant(DebugInfo::kBreakAtEntry))), |
| &tailcall_to_shared); |
| |
| CallRuntime(Runtime::kDebugBreakAtEntry, context, function); |
| Goto(&tailcall_to_shared); |
| } |
| |
| BIND(&tailcall_to_shared); |
| // Tail call into code object on the SharedFunctionInfo. |
| TNode<Code> code = GetSharedFunctionInfoCode(shared); |
| TailCallJSCode(code, context, function, new_target, arg_count); |
| } |
| |
| class RecordWriteCodeStubAssembler : public CodeStubAssembler { |
| public: |
| explicit RecordWriteCodeStubAssembler(compiler::CodeAssemblerState* state) |
| : CodeStubAssembler(state) {} |
| |
| TNode<BoolT> IsMarking() { |
| TNode<ExternalReference> is_marking_addr = ExternalConstant( |
| ExternalReference::heap_is_marking_flag_address(this->isolate())); |
| return Word32NotEqual(Load<Uint8T>(is_marking_addr), Int32Constant(0)); |
| } |
| |
| TNode<BoolT> IsPageFlagSet(TNode<IntPtrT> object, int mask) { |
| TNode<IntPtrT> page = PageFromAddress(object); |
| TNode<IntPtrT> flags = UncheckedCast<IntPtrT>( |
| Load(MachineType::Pointer(), page, |
| IntPtrConstant(BasicMemoryChunk::kFlagsOffset))); |
| return WordNotEqual(WordAnd(flags, IntPtrConstant(mask)), |
| IntPtrConstant(0)); |
| } |
| |
| TNode<BoolT> IsWhite(TNode<IntPtrT> object) { |
| DCHECK_EQ(strcmp(Marking::kWhiteBitPattern, "00"), 0); |
| TNode<IntPtrT> cell; |
| TNode<IntPtrT> mask; |
| GetMarkBit(object, &cell, &mask); |
| TNode<Int32T> mask32 = TruncateIntPtrToInt32(mask); |
| // Non-white has 1 for the first bit, so we only need to check for the first |
| // bit. |
| return Word32Equal(Word32And(Load<Int32T>(cell), mask32), Int32Constant(0)); |
| } |
| |
| void GetMarkBit(TNode<IntPtrT> object, TNode<IntPtrT>* cell, |
| TNode<IntPtrT>* mask) { |
| TNode<IntPtrT> page = PageFromAddress(object); |
| TNode<IntPtrT> bitmap = |
| IntPtrAdd(page, IntPtrConstant(MemoryChunk::kMarkingBitmapOffset)); |
| |
| { |
| // Temp variable to calculate cell offset in bitmap. |
| TNode<WordT> r0; |
| int shift = Bitmap::kBitsPerCellLog2 + kTaggedSizeLog2 - |
| Bitmap::kBytesPerCellLog2; |
| r0 = WordShr(object, IntPtrConstant(shift)); |
| r0 = WordAnd(r0, IntPtrConstant((kPageAlignmentMask >> shift) & |
| ~(Bitmap::kBytesPerCell - 1))); |
| *cell = IntPtrAdd(bitmap, Signed(r0)); |
| } |
| { |
| // Temp variable to calculate bit offset in cell. |
| TNode<WordT> r1; |
| r1 = WordShr(object, IntPtrConstant(kTaggedSizeLog2)); |
| r1 = WordAnd(r1, IntPtrConstant((1 << Bitmap::kBitsPerCellLog2) - 1)); |
| // It seems that LSB(e.g. cl) is automatically used, so no manual masking |
| // is needed. Uncomment the following line otherwise. |
| // WordAnd(r1, IntPtrConstant((1 << kBitsPerByte) - 1))); |
| *mask = WordShl(IntPtrConstant(1), r1); |
| } |
| } |
| |
| TNode<BoolT> ShouldSkipFPRegs(TNode<Smi> mode) { |
| return TaggedEqual(mode, SmiConstant(kDontSaveFPRegs)); |
| } |
| |
| TNode<BoolT> ShouldEmitRememberSet(TNode<Smi> remembered_set) { |
| return TaggedEqual(remembered_set, SmiConstant(EMIT_REMEMBERED_SET)); |
| } |
| |
| template <typename Ret, typename Arg0, typename Arg1> |
| void CallCFunction2WithCallerSavedRegistersMode( |
| TNode<ExternalReference> function, TNode<Arg0> arg0, TNode<Arg1> arg1, |
| TNode<Smi> mode, Label* next) { |
| Label dont_save_fp(this), save_fp(this); |
| Branch(ShouldSkipFPRegs(mode), &dont_save_fp, &save_fp); |
| BIND(&dont_save_fp); |
| { |
| CallCFunctionWithCallerSavedRegisters( |
| function, MachineTypeOf<Ret>::value, kDontSaveFPRegs, |
| std::make_pair(MachineTypeOf<Arg0>::value, arg0), |
| std::make_pair(MachineTypeOf<Arg1>::value, arg1)); |
| Goto(next); |
| } |
| |
| BIND(&save_fp); |
| { |
| CallCFunctionWithCallerSavedRegisters( |
| function, MachineTypeOf<Ret>::value, kSaveFPRegs, |
| std::make_pair(MachineTypeOf<Arg0>::value, arg0), |
| std::make_pair(MachineTypeOf<Arg1>::value, arg1)); |
| Goto(next); |
| } |
| } |
| |
| template <typename Ret, typename Arg0, typename Arg1, typename Arg2> |
| void CallCFunction3WithCallerSavedRegistersMode( |
| TNode<ExternalReference> function, TNode<Arg0> arg0, TNode<Arg1> arg1, |
| TNode<Arg2> arg2, TNode<Smi> mode, Label* next) { |
| Label dont_save_fp(this), save_fp(this); |
| Branch(ShouldSkipFPRegs(mode), &dont_save_fp, &save_fp); |
| BIND(&dont_save_fp); |
| { |
| CallCFunctionWithCallerSavedRegisters( |
| function, MachineTypeOf<Ret>::value, kDontSaveFPRegs, |
| std::make_pair(MachineTypeOf<Arg0>::value, arg0), |
| std::make_pair(MachineTypeOf<Arg1>::value, arg1), |
| std::make_pair(MachineTypeOf<Arg2>::value, arg2)); |
| Goto(next); |
| } |
| |
| BIND(&save_fp); |
| { |
| CallCFunctionWithCallerSavedRegisters( |
| function, MachineTypeOf<Ret>::value, kSaveFPRegs, |
| std::make_pair(MachineTypeOf<Arg0>::value, arg0), |
| std::make_pair(MachineTypeOf<Arg1>::value, arg1), |
| std::make_pair(MachineTypeOf<Arg2>::value, arg2)); |
| Goto(next); |
| } |
| } |
| |
| void InsertIntoRememberedSetAndGotoSlow(TNode<IntPtrT> object, |
| TNode<IntPtrT> slot, TNode<Smi> mode, |
| Label* next) { |
| TNode<IntPtrT> page = PageFromAddress(object); |
| TNode<ExternalReference> function = |
| ExternalConstant(ExternalReference::insert_remembered_set_function()); |
| CallCFunction2WithCallerSavedRegistersMode<Int32T, IntPtrT, IntPtrT>( |
| function, page, slot, mode, next); |
| } |
| |
| void InsertIntoRememberedSetAndGoto(TNode<IntPtrT> object, |
| TNode<IntPtrT> slot, TNode<Smi> mode, |
| Label* next) { |
| Label slow_path(this); |
| TNode<IntPtrT> page = PageFromAddress(object); |
| |
| // Load address of SlotSet |
| TNode<IntPtrT> slot_set = LoadSlotSet(page, &slow_path); |
| TNode<IntPtrT> slot_offset = IntPtrSub(slot, page); |
| |
| // Load bucket |
| TNode<IntPtrT> bucket = LoadBucket(slot_set, slot_offset, &slow_path); |
| |
| // Update cell |
| SetBitInCell(bucket, slot_offset); |
| |
| Goto(next); |
| |
| BIND(&slow_path); |
| InsertIntoRememberedSetAndGotoSlow(object, slot, mode, next); |
| } |
| |
| TNode<IntPtrT> LoadSlotSet(TNode<IntPtrT> page, Label* slow_path) { |
| TNode<IntPtrT> slot_set = UncheckedCast<IntPtrT>( |
| Load(MachineType::Pointer(), page, |
| IntPtrConstant(MemoryChunk::kOldToNewSlotSetOffset))); |
| GotoIf(WordEqual(slot_set, IntPtrConstant(0)), slow_path); |
| |
| return slot_set; |
| } |
| |
| TNode<IntPtrT> LoadBucket(TNode<IntPtrT> slot_set, TNode<WordT> slot_offset, |
| Label* slow_path) { |
| TNode<WordT> bucket_index = |
| WordShr(slot_offset, SlotSet::kBitsPerBucketLog2 + kTaggedSizeLog2); |
| TNode<IntPtrT> bucket = UncheckedCast<IntPtrT>( |
| Load(MachineType::Pointer(), slot_set, |
| WordShl(bucket_index, kSystemPointerSizeLog2))); |
| GotoIf(WordEqual(bucket, IntPtrConstant(0)), slow_path); |
| return bucket; |
| } |
| |
| void SetBitInCell(TNode<IntPtrT> bucket, TNode<WordT> slot_offset) { |
| // Load cell value |
| TNode<WordT> cell_offset = WordAnd( |
| WordShr(slot_offset, SlotSet::kBitsPerCellLog2 + kTaggedSizeLog2 - |
| SlotSet::kCellSizeBytesLog2), |
| IntPtrConstant((SlotSet::kCellsPerBucket - 1) |
| << SlotSet::kCellSizeBytesLog2)); |
| TNode<IntPtrT> cell_address = |
| UncheckedCast<IntPtrT>(IntPtrAdd(bucket, cell_offset)); |
| TNode<IntPtrT> old_cell_value = |
| ChangeInt32ToIntPtr(Load<Int32T>(cell_address)); |
| |
| // Calculate new cell value |
| TNode<WordT> bit_index = WordAnd(WordShr(slot_offset, kTaggedSizeLog2), |
| IntPtrConstant(SlotSet::kBitsPerCell - 1)); |
| TNode<IntPtrT> new_cell_value = UncheckedCast<IntPtrT>( |
| WordOr(old_cell_value, WordShl(IntPtrConstant(1), bit_index))); |
| |
| // Update cell value |
| StoreNoWriteBarrier(MachineRepresentation::kWord32, cell_address, |
| TruncateIntPtrToInt32(new_cell_value)); |
| } |
| }; |
| |
| TF_BUILTIN(RecordWrite, RecordWriteCodeStubAssembler) { |
| Label generational_wb(this); |
| Label incremental_wb(this); |
| Label exit(this); |
| |
| auto remembered_set = UncheckedParameter<Smi>(Descriptor::kRememberedSet); |
| Branch(ShouldEmitRememberSet(remembered_set), &generational_wb, |
| &incremental_wb); |
| |
| BIND(&generational_wb); |
| { |
| Label test_old_to_young_flags(this); |
| Label store_buffer_exit(this), store_buffer_incremental_wb(this); |
| |
| // When incremental marking is not on, we skip cross generation pointer |
| // checking here, because there are checks for |
| // `kPointersFromHereAreInterestingMask` and |
| // `kPointersToHereAreInterestingMask` in |
| // `src/compiler/<arch>/code-generator-<arch>.cc` before calling this stub, |
| // which serves as the cross generation checking. |
| auto slot = UncheckedParameter<IntPtrT>(Descriptor::kSlot); |
| Branch(IsMarking(), &test_old_to_young_flags, &store_buffer_exit); |
| |
| BIND(&test_old_to_young_flags); |
| { |
| // TODO(ishell): do a new-space range check instead. |
| TNode<IntPtrT> value = |
| BitcastTaggedToWord(Load(MachineType::TaggedPointer(), slot)); |
| |
| // TODO(albertnetymk): Try to cache the page flag for value and object, |
| // instead of calling IsPageFlagSet each time. |
| TNode<BoolT> value_is_young = |
| IsPageFlagSet(value, MemoryChunk::kIsInYoungGenerationMask); |
| GotoIfNot(value_is_young, &incremental_wb); |
| |
| TNode<IntPtrT> object = |
| BitcastTaggedToWord(UntypedParameter(Descriptor::kObject)); |
| TNode<BoolT> object_is_young = |
| IsPageFlagSet(object, MemoryChunk::kIsInYoungGenerationMask); |
| Branch(object_is_young, &incremental_wb, &store_buffer_incremental_wb); |
| } |
| |
| BIND(&store_buffer_exit); |
| { |
| auto fp_mode = UncheckedParameter<Smi>(Descriptor::kFPMode); |
| TNode<IntPtrT> object = |
| BitcastTaggedToWord(UntypedParameter(Descriptor::kObject)); |
| InsertIntoRememberedSetAndGoto(object, slot, fp_mode, &exit); |
| } |
| |
| BIND(&store_buffer_incremental_wb); |
| { |
| auto fp_mode = UncheckedParameter<Smi>(Descriptor::kFPMode); |
| TNode<IntPtrT> object = |
| BitcastTaggedToWord(UntypedParameter(Descriptor::kObject)); |
| InsertIntoRememberedSetAndGoto(object, slot, fp_mode, &incremental_wb); |
| } |
| } |
| |
| BIND(&incremental_wb); |
| { |
| Label call_incremental_wb(this); |
| |
| auto slot = UncheckedParameter<IntPtrT>(Descriptor::kSlot); |
| TNode<IntPtrT> value = |
| BitcastTaggedToWord(Load(MachineType::TaggedPointer(), slot)); |
| |
| // There are two cases we need to call incremental write barrier. |
| // 1) value_is_white |
| GotoIf(IsWhite(value), &call_incremental_wb); |
| |
| // 2) is_compacting && value_in_EC && obj_isnt_skip |
| // is_compacting = true when is_marking = true |
| GotoIfNot(IsPageFlagSet(value, MemoryChunk::kEvacuationCandidateMask), |
| &exit); |
| |
| TNode<IntPtrT> object = |
| BitcastTaggedToWord(UntypedParameter(Descriptor::kObject)); |
| Branch( |
| IsPageFlagSet(object, MemoryChunk::kSkipEvacuationSlotsRecordingMask), |
| &exit, &call_incremental_wb); |
| |
| BIND(&call_incremental_wb); |
| { |
| TNode<ExternalReference> function = ExternalConstant( |
| ExternalReference::write_barrier_marking_from_code_function()); |
| auto fp_mode = UncheckedParameter<Smi>(Descriptor::kFPMode); |
| TNode<IntPtrT> object = |
| BitcastTaggedToWord(UntypedParameter(Descriptor::kObject)); |
| CallCFunction2WithCallerSavedRegistersMode<Int32T, IntPtrT, IntPtrT>( |
| function, object, slot, fp_mode, &exit); |
| } |
| } |
| |
| BIND(&exit); |
| IncrementCounter(isolate()->counters()->write_barriers(), 1); |
| Return(TrueConstant()); |
| } |
| |
| TF_BUILTIN(EphemeronKeyBarrier, RecordWriteCodeStubAssembler) { |
| Label exit(this); |
| |
| TNode<ExternalReference> function = ExternalConstant( |
| ExternalReference::ephemeron_key_write_barrier_function()); |
| TNode<ExternalReference> isolate_constant = |
| ExternalConstant(ExternalReference::isolate_address(isolate())); |
| auto address = UncheckedParameter<IntPtrT>(Descriptor::kSlotAddress); |
| TNode<IntPtrT> object = |
| BitcastTaggedToWord(UntypedParameter(Descriptor::kObject)); |
| TNode<Smi> fp_mode = UncheckedParameter<Smi>(Descriptor::kFPMode); |
| CallCFunction3WithCallerSavedRegistersMode<Int32T, IntPtrT, IntPtrT, |
| ExternalReference>( |
| function, object, address, isolate_constant, fp_mode, &exit); |
| |
| BIND(&exit); |
| IncrementCounter(isolate()->counters()->write_barriers(), 1); |
| Return(TrueConstant()); |
| } |
| |
| class DeletePropertyBaseAssembler : public AccessorAssembler { |
| public: |
| explicit DeletePropertyBaseAssembler(compiler::CodeAssemblerState* state) |
| : AccessorAssembler(state) {} |
| |
| void DeleteDictionaryProperty(TNode<Object> receiver, |
| TNode<NameDictionary> properties, |
| TNode<Name> name, TNode<Context> context, |
| Label* dont_delete, Label* notfound) { |
| TVARIABLE(IntPtrT, var_name_index); |
| Label dictionary_found(this, &var_name_index); |
| NameDictionaryLookup<NameDictionary>(properties, name, &dictionary_found, |
| &var_name_index, notfound); |
| |
| BIND(&dictionary_found); |
| TNode<IntPtrT> key_index = var_name_index.value(); |
| TNode<Uint32T> details = LoadDetailsByKeyIndex(properties, key_index); |
| GotoIf(IsSetWord32(details, PropertyDetails::kAttributesDontDeleteMask), |
| dont_delete); |
| // Overwrite the entry itself (see NameDictionary::SetEntry). |
| TNode<Oddball> filler = TheHoleConstant(); |
| DCHECK(RootsTable::IsImmortalImmovable(RootIndex::kTheHoleValue)); |
| StoreFixedArrayElement(properties, key_index, filler, SKIP_WRITE_BARRIER); |
| StoreValueByKeyIndex<NameDictionary>(properties, key_index, filler, |
| SKIP_WRITE_BARRIER); |
| StoreDetailsByKeyIndex<NameDictionary>(properties, key_index, |
| SmiConstant(0)); |
| |
| // Update bookkeeping information (see NameDictionary::ElementRemoved). |
| TNode<Smi> nof = GetNumberOfElements<NameDictionary>(properties); |
| TNode<Smi> new_nof = SmiSub(nof, SmiConstant(1)); |
| SetNumberOfElements<NameDictionary>(properties, new_nof); |
| TNode<Smi> num_deleted = |
| GetNumberOfDeletedElements<NameDictionary>(properties); |
| TNode<Smi> new_deleted = SmiAdd(num_deleted, SmiConstant(1)); |
| SetNumberOfDeletedElements<NameDictionary>(properties, new_deleted); |
| |
| // Shrink the dictionary if necessary (see NameDictionary::Shrink). |
| Label shrinking_done(this); |
| TNode<Smi> capacity = GetCapacity<NameDictionary>(properties); |
| GotoIf(SmiGreaterThan(new_nof, SmiShr(capacity, 2)), &shrinking_done); |
| GotoIf(SmiLessThan(new_nof, SmiConstant(16)), &shrinking_done); |
| CallRuntime(Runtime::kShrinkPropertyDictionary, context, receiver); |
| Goto(&shrinking_done); |
| BIND(&shrinking_done); |
| |
| Return(TrueConstant()); |
| } |
| }; |
| |
| TF_BUILTIN(DeleteProperty, DeletePropertyBaseAssembler) { |
| auto receiver = Parameter<Object>(Descriptor::kObject); |
| auto key = Parameter<Object>(Descriptor::kKey); |
| auto language_mode = Parameter<Smi>(Descriptor::kLanguageMode); |
| auto context = Parameter<Context>(Descriptor::kContext); |
| |
| TVARIABLE(IntPtrT, var_index); |
| TVARIABLE(Name, var_unique); |
| Label if_index(this, &var_index), if_unique_name(this), if_notunique(this), |
| if_notfound(this), slow(this), if_proxy(this); |
| |
| GotoIf(TaggedIsSmi(receiver), &slow); |
| TNode<Map> receiver_map = LoadMap(CAST(receiver)); |
| TNode<Uint16T> instance_type = LoadMapInstanceType(receiver_map); |
| GotoIf(InstanceTypeEqual(instance_type, JS_PROXY_TYPE), &if_proxy); |
| GotoIf(IsCustomElementsReceiverInstanceType(instance_type), &slow); |
| TryToName(key, &if_index, &var_index, &if_unique_name, &var_unique, &slow, |
| &if_notunique); |
| |
| BIND(&if_index); |
| { |
| Comment("integer index"); |
| Goto(&slow); // TODO(jkummerow): Implement more smarts here. |
| } |
| |
| BIND(&if_unique_name); |
| { |
| Comment("key is unique name"); |
| CheckForAssociatedProtector(var_unique.value(), &slow); |
| |
| Label dictionary(this), dont_delete(this); |
| GotoIf(IsDictionaryMap(receiver_map), &dictionary); |
| |
| // Fast properties need to clear recorded slots, which can only be done |
| // in C++. |
| Goto(&slow); |
| |
| BIND(&dictionary); |
| { |
| InvalidateValidityCellIfPrototype(receiver_map); |
| |
| TNode<NameDictionary> properties = |
| CAST(LoadSlowProperties(CAST(receiver))); |
| DeleteDictionaryProperty(receiver, properties, var_unique.value(), |
| context, &dont_delete, &if_notfound); |
| } |
| |
| BIND(&dont_delete); |
| { |
| STATIC_ASSERT(LanguageModeSize == 2); |
| GotoIf(SmiNotEqual(language_mode, SmiConstant(LanguageMode::kSloppy)), |
| &slow); |
| Return(FalseConstant()); |
| } |
| } |
| |
| BIND(&if_notunique); |
| { |
| // If the string was not found in the string table, then no object can |
| // have a property with that name. |
| TryInternalizeString(CAST(key), &if_index, &var_index, &if_unique_name, |
| &var_unique, &if_notfound, &slow); |
| } |
| |
| BIND(&if_notfound); |
| Return(TrueConstant()); |
| |
| BIND(&if_proxy); |
| { |
| TNode<Name> name = CAST(CallBuiltin(Builtins::kToName, context, key)); |
| GotoIf(IsPrivateSymbol(name), &slow); |
| TailCallBuiltin(Builtins::kProxyDeleteProperty, context, receiver, name, |
| language_mode); |
| } |
| |
| BIND(&slow); |
| { |
| TailCallRuntime(Runtime::kDeleteProperty, context, receiver, key, |
| language_mode); |
| } |
| } |
| |
| namespace { |
| |
| class SetOrCopyDataPropertiesAssembler : public CodeStubAssembler { |
| public: |
| explicit SetOrCopyDataPropertiesAssembler(compiler::CodeAssemblerState* state) |
| : CodeStubAssembler(state) {} |
| |
| protected: |
| TNode<Object> SetOrCopyDataProperties(TNode<Context> context, |
| TNode<JSReceiver> target, |
| TNode<Object> source, Label* if_runtime, |
| bool use_set = true) { |
| Label if_done(this), if_noelements(this), |
| if_sourcenotjsobject(this, Label::kDeferred); |
| |
| // JSPrimitiveWrapper wrappers for numbers don't have any enumerable own |
| // properties, so we can immediately skip the whole operation if {source} is |
| // a Smi. |
| GotoIf(TaggedIsSmi(source), &if_done); |
| |
| // Otherwise check if {source} is a proper JSObject, and if not, defer |
| // to testing for non-empty strings below. |
| TNode<Map> source_map = LoadMap(CAST(source)); |
| TNode<Uint16T> source_instance_type = LoadMapInstanceType(source_map); |
| GotoIfNot(IsJSObjectInstanceType(source_instance_type), |
| &if_sourcenotjsobject); |
| |
| TNode<FixedArrayBase> source_elements = LoadElements(CAST(source)); |
| GotoIf(IsEmptyFixedArray(source_elements), &if_noelements); |
| Branch(IsEmptySlowElementDictionary(source_elements), &if_noelements, |
| if_runtime); |
| |
| BIND(&if_noelements); |
| { |
| // If the target is deprecated, the object will be updated on first store. |
| // If the source for that store equals the target, this will invalidate |
| // the cached representation of the source. Handle this case in runtime. |
| TNode<Map> target_map = LoadMap(target); |
| GotoIf(IsDeprecatedMap(target_map), if_runtime); |
| |
| if (use_set) { |
| TNode<BoolT> target_is_simple_receiver = IsSimpleObjectMap(target_map); |
| ForEachEnumerableOwnProperty( |
| context, source_map, CAST(source), kEnumerationOrder, |
| [=](TNode<Name> key, TNode<Object> value) { |
| KeyedStoreGenericGenerator::SetProperty( |
| state(), context, target, target_is_simple_receiver, key, |
| value, LanguageMode::kStrict); |
| }, |
| if_runtime); |
| } else { |
| ForEachEnumerableOwnProperty( |
| context, source_map, CAST(source), kEnumerationOrder, |
| [=](TNode<Name> key, TNode<Object> value) { |
| CallBuiltin(Builtins::kSetPropertyInLiteral, context, target, key, |
| value); |
| }, |
| if_runtime); |
| } |
| Goto(&if_done); |
| } |
| |
| BIND(&if_sourcenotjsobject); |
| { |
| // Handle other JSReceivers in the runtime. |
| GotoIf(IsJSReceiverInstanceType(source_instance_type), if_runtime); |
| |
| // Non-empty strings are the only non-JSReceivers that need to be |
| // handled explicitly by Object.assign() and CopyDataProperties. |
| GotoIfNot(IsStringInstanceType(source_instance_type), &if_done); |
| TNode<IntPtrT> source_length = LoadStringLengthAsWord(CAST(source)); |
| Branch(IntPtrEqual(source_length, IntPtrConstant(0)), &if_done, |
| if_runtime); |
| } |
| |
| BIND(&if_done); |
| return UndefinedConstant(); |
| } |
| }; |
| |
| } // namespace |
| |
| // ES #sec-copydataproperties |
| TF_BUILTIN(CopyDataProperties, SetOrCopyDataPropertiesAssembler) { |
| auto target = Parameter<JSObject>(Descriptor::kTarget); |
| auto source = Parameter<Object>(Descriptor::kSource); |
| auto context = Parameter<Context>(Descriptor::kContext); |
| |
| CSA_ASSERT(this, TaggedNotEqual(target, source)); |
| |
| Label if_runtime(this, Label::kDeferred); |
| Return(SetOrCopyDataProperties(context, target, source, &if_runtime, false)); |
| |
| BIND(&if_runtime); |
| TailCallRuntime(Runtime::kCopyDataProperties, context, target, source); |
| } |
| |
| TF_BUILTIN(SetDataProperties, SetOrCopyDataPropertiesAssembler) { |
| auto target = Parameter<JSReceiver>(Descriptor::kTarget); |
| auto source = Parameter<Object>(Descriptor::kSource); |
| auto context = Parameter<Context>(Descriptor::kContext); |
| |
| Label if_runtime(this, Label::kDeferred); |
| Return(SetOrCopyDataProperties(context, target, source, &if_runtime, true)); |
| |
| BIND(&if_runtime); |
| TailCallRuntime(Runtime::kSetDataProperties, context, target, source); |
| } |
| |
| TF_BUILTIN(ForInEnumerate, CodeStubAssembler) { |
| auto receiver = Parameter<JSReceiver>(Descriptor::kReceiver); |
| auto context = Parameter<Context>(Descriptor::kContext); |
| |
| Label if_empty(this), if_runtime(this, Label::kDeferred); |
| TNode<Map> receiver_map = CheckEnumCache(receiver, &if_empty, &if_runtime); |
| Return(receiver_map); |
| |
| BIND(&if_empty); |
| Return(EmptyFixedArrayConstant()); |
| |
| BIND(&if_runtime); |
| TailCallRuntime(Runtime::kForInEnumerate, context, receiver); |
| } |
| |
| TF_BUILTIN(ForInFilter, CodeStubAssembler) { |
| auto key = Parameter<String>(Descriptor::kKey); |
| auto object = Parameter<HeapObject>(Descriptor::kObject); |
| auto context = Parameter<Context>(Descriptor::kContext); |
| |
| Label if_true(this), if_false(this); |
| TNode<Oddball> result = HasProperty(context, object, key, kForInHasProperty); |
| Branch(IsTrue(result), &if_true, &if_false); |
| |
| BIND(&if_true); |
| Return(key); |
| |
| BIND(&if_false); |
| Return(UndefinedConstant()); |
| } |
| |
| TF_BUILTIN(SameValue, CodeStubAssembler) { |
| auto lhs = Parameter<Object>(Descriptor::kLeft); |
| auto rhs = Parameter<Object>(Descriptor::kRight); |
| |
| Label if_true(this), if_false(this); |
| BranchIfSameValue(lhs, rhs, &if_true, &if_false); |
| |
| BIND(&if_true); |
| Return(TrueConstant()); |
| |
| BIND(&if_false); |
| Return(FalseConstant()); |
| } |
| |
| TF_BUILTIN(SameValueNumbersOnly, CodeStubAssembler) { |
| auto lhs = Parameter<Object>(Descriptor::kLeft); |
| auto rhs = Parameter<Object>(Descriptor::kRight); |
| |
| Label if_true(this), if_false(this); |
| BranchIfSameValue(lhs, rhs, &if_true, &if_false, SameValueMode::kNumbersOnly); |
| |
| BIND(&if_true); |
| Return(TrueConstant()); |
| |
| BIND(&if_false); |
| Return(FalseConstant()); |
| } |
| |
| TF_BUILTIN(AdaptorWithBuiltinExitFrame, CodeStubAssembler) { |
| auto target = Parameter<JSFunction>(Descriptor::kTarget); |
| auto new_target = Parameter<Object>(Descriptor::kNewTarget); |
| auto c_function = UncheckedParameter<WordT>(Descriptor::kCFunction); |
| |
| // The logic contained here is mirrored for TurboFan inlining in |
| // JSTypedLowering::ReduceJSCall{Function,Construct}. Keep these in sync. |
| |
| // Make sure we operate in the context of the called function (for example |
| // ConstructStubs implemented in C++ will be run in the context of the caller |
| // instead of the callee, due to the way that [[Construct]] is defined for |
| // ordinary functions). |
| TNode<Context> context = LoadJSFunctionContext(target); |
| |
| auto actual_argc = |
| UncheckedParameter<Int32T>(Descriptor::kActualArgumentsCount); |
| |
| TVARIABLE(Int32T, pushed_argc, actual_argc); |
| |
| #ifdef V8_NO_ARGUMENTS_ADAPTOR |
| TNode<SharedFunctionInfo> shared = LoadJSFunctionSharedFunctionInfo(target); |
| |
| TNode<Int32T> formal_count = |
| UncheckedCast<Int32T>(LoadSharedFunctionInfoFormalParameterCount(shared)); |
| |
| // The number of arguments pushed is the maximum of actual arguments count |
| // and formal parameters count. Except when the formal parameters count is |
| // the sentinel. |
| Label check_argc(this), update_argc(this), done_argc(this); |
| |
| Branch(Word32Equal(formal_count, Int32Constant(kDontAdaptArgumentsSentinel)), |
| &done_argc, &check_argc); |
| BIND(&check_argc); |
| Branch(Int32GreaterThan(formal_count, pushed_argc.value()), &update_argc, |
| &done_argc); |
| BIND(&update_argc); |
| pushed_argc = formal_count; |
| Goto(&done_argc); |
| BIND(&done_argc); |
| #endif |
| |
| // Update arguments count for CEntry to contain the number of arguments |
| // including the receiver and the extra arguments. |
| TNode<Int32T> argc = Int32Add( |
| pushed_argc.value(), |
| Int32Constant(BuiltinExitFrameConstants::kNumExtraArgsWithReceiver)); |
| |
| const bool builtin_exit_frame = true; |
| TNode<Code> code = HeapConstant(CodeFactory::CEntry( |
| isolate(), 1, kDontSaveFPRegs, kArgvOnStack, builtin_exit_frame)); |
| |
| // Unconditionally push argc, target and new target as extra stack arguments. |
| // They will be used by stack frame iterators when constructing stack trace. |
| TailCallStub(CEntry1ArgvOnStackDescriptor{}, // descriptor |
| code, context, // standard arguments for TailCallStub |
| argc, c_function, // register arguments |
| TheHoleConstant(), // additional stack argument 1 (padding) |
| SmiFromInt32(argc), // additional stack argument 2 |
| target, // additional stack argument 3 |
| new_target); // additional stack argument 4 |
| } |
| |
| TF_BUILTIN(AllocateInYoungGeneration, CodeStubAssembler) { |
| auto requested_size = UncheckedParameter<IntPtrT>(Descriptor::kRequestedSize); |
| CSA_CHECK(this, IsValidPositiveSmi(requested_size)); |
| |
| TNode<Smi> allocation_flags = |
| SmiConstant(Smi::FromInt(AllocateDoubleAlignFlag::encode(false) | |
| AllowLargeObjectAllocationFlag::encode(true))); |
| TailCallRuntime(Runtime::kAllocateInYoungGeneration, NoContextConstant(), |
| SmiFromIntPtr(requested_size), allocation_flags); |
| } |
| |
| TF_BUILTIN(AllocateRegularInYoungGeneration, CodeStubAssembler) { |
| auto requested_size = UncheckedParameter<IntPtrT>(Descriptor::kRequestedSize); |
| CSA_CHECK(this, IsValidPositiveSmi(requested_size)); |
| |
| TNode<Smi> allocation_flags = |
| SmiConstant(Smi::FromInt(AllocateDoubleAlignFlag::encode(false) | |
| AllowLargeObjectAllocationFlag::encode(false))); |
| TailCallRuntime(Runtime::kAllocateInYoungGeneration, NoContextConstant(), |
| SmiFromIntPtr(requested_size), allocation_flags); |
| } |
| |
| TF_BUILTIN(AllocateInOldGeneration, CodeStubAssembler) { |
| auto requested_size = UncheckedParameter<IntPtrT>(Descriptor::kRequestedSize); |
| CSA_CHECK(this, IsValidPositiveSmi(requested_size)); |
| |
| TNode<Smi> runtime_flags = |
| SmiConstant(Smi::FromInt(AllocateDoubleAlignFlag::encode(false) | |
| AllowLargeObjectAllocationFlag::encode(true))); |
| TailCallRuntime(Runtime::kAllocateInOldGeneration, NoContextConstant(), |
| SmiFromIntPtr(requested_size), runtime_flags); |
| } |
| |
| TF_BUILTIN(AllocateRegularInOldGeneration, CodeStubAssembler) { |
| auto requested_size = UncheckedParameter<IntPtrT>(Descriptor::kRequestedSize); |
| CSA_CHECK(this, IsValidPositiveSmi(requested_size)); |
| |
| TNode<Smi> runtime_flags = |
| SmiConstant(Smi::FromInt(AllocateDoubleAlignFlag::encode(false) | |
| AllowLargeObjectAllocationFlag::encode(false))); |
| TailCallRuntime(Runtime::kAllocateInOldGeneration, NoContextConstant(), |
| SmiFromIntPtr(requested_size), runtime_flags); |
| } |
| |
| TF_BUILTIN(Abort, CodeStubAssembler) { |
| auto message_id = Parameter<Smi>(Descriptor::kMessageOrMessageId); |
| TailCallRuntime(Runtime::kAbort, NoContextConstant(), message_id); |
| } |
| |
| TF_BUILTIN(AbortCSAAssert, CodeStubAssembler) { |
| auto message = Parameter<String>(Descriptor::kMessageOrMessageId); |
| TailCallRuntime(Runtime::kAbortCSAAssert, NoContextConstant(), message); |
| } |
| |
| void Builtins::Generate_CEntry_Return1_DontSaveFPRegs_ArgvOnStack_NoBuiltinExit( |
| MacroAssembler* masm) { |
| Generate_CEntry(masm, 1, kDontSaveFPRegs, kArgvOnStack, false); |
| } |
| |
| void Builtins::Generate_CEntry_Return1_DontSaveFPRegs_ArgvOnStack_BuiltinExit( |
| MacroAssembler* masm) { |
| Generate_CEntry(masm, 1, kDontSaveFPRegs, kArgvOnStack, true); |
| } |
| |
| void Builtins:: |
| Generate_CEntry_Return1_DontSaveFPRegs_ArgvInRegister_NoBuiltinExit( |
| MacroAssembler* masm) { |
| Generate_CEntry(masm, 1, kDontSaveFPRegs, kArgvInRegister, false); |
| } |
| |
| void Builtins::Generate_CEntry_Return1_SaveFPRegs_ArgvOnStack_NoBuiltinExit( |
| MacroAssembler* masm) { |
| Generate_CEntry(masm, 1, kSaveFPRegs, kArgvOnStack, false); |
| } |
| |
| void Builtins::Generate_CEntry_Return1_SaveFPRegs_ArgvOnStack_BuiltinExit( |
| MacroAssembler* masm) { |
| Generate_CEntry(masm, 1, kSaveFPRegs, kArgvOnStack, true); |
| } |
| |
| void Builtins::Generate_CEntry_Return2_DontSaveFPRegs_ArgvOnStack_NoBuiltinExit( |
| MacroAssembler* masm) { |
| Generate_CEntry(masm, 2, kDontSaveFPRegs, kArgvOnStack, false); |
| } |
| |
| void Builtins::Generate_CEntry_Return2_DontSaveFPRegs_ArgvOnStack_BuiltinExit( |
| MacroAssembler* masm) { |
| Generate_CEntry(masm, 2, kDontSaveFPRegs, kArgvOnStack, true); |
| } |
| |
| void Builtins:: |
| Generate_CEntry_Return2_DontSaveFPRegs_ArgvInRegister_NoBuiltinExit( |
| MacroAssembler* masm) { |
| Generate_CEntry(masm, 2, kDontSaveFPRegs, kArgvInRegister, false); |
| } |
| |
| void Builtins::Generate_CEntry_Return2_SaveFPRegs_ArgvOnStack_NoBuiltinExit( |
| MacroAssembler* masm) { |
| Generate_CEntry(masm, 2, kSaveFPRegs, kArgvOnStack, false); |
| } |
| |
| void Builtins::Generate_CEntry_Return2_SaveFPRegs_ArgvOnStack_BuiltinExit( |
| MacroAssembler* masm) { |
| Generate_CEntry(masm, 2, kSaveFPRegs, kArgvOnStack, true); |
| } |
| |
| #if !defined(V8_TARGET_ARCH_ARM) && !defined(V8_TARGET_ARCH_MIPS) |
| void Builtins::Generate_MemCopyUint8Uint8(MacroAssembler* masm) { |
| masm->Call(BUILTIN_CODE(masm->isolate(), Illegal), RelocInfo::CODE_TARGET); |
| } |
| #endif // !defined(V8_TARGET_ARCH_ARM) && !defined(V8_TARGET_ARCH_MIPS) |
| |
| #ifndef V8_TARGET_ARCH_IA32 |
| void Builtins::Generate_MemMove(MacroAssembler* masm) { |
| masm->Call(BUILTIN_CODE(masm->isolate(), Illegal), RelocInfo::CODE_TARGET); |
| } |
| #endif // V8_TARGET_ARCH_IA32 |
| |
| // ES6 [[Get]] operation. |
| TF_BUILTIN(GetProperty, CodeStubAssembler) { |
| auto object = Parameter<Object>(Descriptor::kObject); |
| auto key = Parameter<Object>(Descriptor::kKey); |
| auto context = Parameter<Context>(Descriptor::kContext); |
| // TODO(duongn): consider tailcalling to GetPropertyWithReceiver(object, |
| // object, key, OnNonExistent::kReturnUndefined). |
| Label if_notfound(this), if_proxy(this, Label::kDeferred), |
| if_slow(this, Label::kDeferred); |
| |
| CodeStubAssembler::LookupPropertyInHolder lookup_property_in_holder = |
| [=](TNode<HeapObject> receiver, TNode<HeapObject> holder, |
| TNode<Map> holder_map, TNode<Int32T> holder_instance_type, |
| TNode<Name> unique_name, Label* next_holder, Label* if_bailout) { |
| TVARIABLE(Object, var_value); |
| Label if_found(this); |
| TryGetOwnProperty(context, receiver, CAST(holder), holder_map, |
| holder_instance_type, unique_name, &if_found, |
| &var_value, next_holder, if_bailout); |
| BIND(&if_found); |
| Return(var_value.value()); |
| }; |
| |
| CodeStubAssembler::LookupElementInHolder lookup_element_in_holder = |
| [=](TNode<HeapObject> receiver, TNode<HeapObject> holder, |
| TNode<Map> holder_map, TNode<Int32T> holder_instance_type, |
| TNode<IntPtrT> index, Label* next_holder, Label* if_bailout) { |
| // Not supported yet. |
| Use(next_holder); |
| Goto(if_bailout); |
| }; |
| |
| TryPrototypeChainLookup(object, object, key, lookup_property_in_holder, |
| lookup_element_in_holder, &if_notfound, &if_slow, |
| &if_proxy); |
| |
| BIND(&if_notfound); |
| Return(UndefinedConstant()); |
| |
| BIND(&if_slow); |
| TailCallRuntime(Runtime::kGetProperty, context, object, key); |
| |
| BIND(&if_proxy); |
| { |
| // Convert the {key} to a Name first. |
| TNode<Object> name = CallBuiltin(Builtins::kToName, context, key); |
| |
| // The {object} is a JSProxy instance, look up the {name} on it, passing |
| // {object} both as receiver and holder. If {name} is absent we can safely |
| // return undefined from here. |
| TailCallBuiltin(Builtins::kProxyGetProperty, context, object, name, object, |
| SmiConstant(OnNonExistent::kReturnUndefined)); |
| } |
| } |
| |
| // ES6 [[Get]] operation with Receiver. |
| TF_BUILTIN(GetPropertyWithReceiver, CodeStubAssembler) { |
| auto object = Parameter<Object>(Descriptor::kObject); |
| auto key = Parameter<Object>(Descriptor::kKey); |
| auto context = Parameter<Context>(Descriptor::kContext); |
| auto receiver = Parameter<Object>(Descriptor::kReceiver); |
| auto on_non_existent = Parameter<Object>(Descriptor::kOnNonExistent); |
| Label if_notfound(this), if_proxy(this, Label::kDeferred), |
| if_slow(this, Label::kDeferred); |
| |
| CodeStubAssembler::LookupPropertyInHolder lookup_property_in_holder = |
| [=](TNode<HeapObject> receiver, TNode<HeapObject> holder, |
| TNode<Map> holder_map, TNode<Int32T> holder_instance_type, |
| TNode<Name> unique_name, Label* next_holder, Label* if_bailout) { |
| TVARIABLE(Object, var_value); |
| Label if_found(this); |
| TryGetOwnProperty(context, receiver, CAST(holder), holder_map, |
| holder_instance_type, unique_name, &if_found, |
| &var_value, next_holder, if_bailout); |
| BIND(&if_found); |
| Return(var_value.value()); |
| }; |
| |
| CodeStubAssembler::LookupElementInHolder lookup_element_in_holder = |
| [=](TNode<HeapObject> receiver, TNode<HeapObject> holder, |
| TNode<Map> holder_map, TNode<Int32T> holder_instance_type, |
| TNode<IntPtrT> index, Label* next_holder, Label* if_bailout) { |
| // Not supported yet. |
| Use(next_holder); |
| Goto(if_bailout); |
| }; |
| |
| TryPrototypeChainLookup(receiver, object, key, lookup_property_in_holder, |
| lookup_element_in_holder, &if_notfound, &if_slow, |
| &if_proxy); |
| |
| BIND(&if_notfound); |
| Label throw_reference_error(this); |
| GotoIf(TaggedEqual(on_non_existent, |
| SmiConstant(OnNonExistent::kThrowReferenceError)), |
| &throw_reference_error); |
| CSA_ASSERT(this, TaggedEqual(on_non_existent, |
| SmiConstant(OnNonExistent::kReturnUndefined))); |
| Return(UndefinedConstant()); |
| |
| BIND(&throw_reference_error); |
| Return(CallRuntime(Runtime::kThrowReferenceError, context, key)); |
| |
| BIND(&if_slow); |
| TailCallRuntime(Runtime::kGetPropertyWithReceiver, context, object, key, |
| receiver, on_non_existent); |
| |
| BIND(&if_proxy); |
| { |
| // Convert the {key} to a Name first. |
| TNode<Name> name = CAST(CallBuiltin(Builtins::kToName, context, key)); |
| |
| // Proxy cannot handle private symbol so bailout. |
| GotoIf(IsPrivateSymbol(name), &if_slow); |
| |
| // The {object} is a JSProxy instance, look up the {name} on it, passing |
| // {object} both as receiver and holder. If {name} is absent we can safely |
| // return undefined from here. |
| TailCallBuiltin(Builtins::kProxyGetProperty, context, object, name, |
| receiver, on_non_existent); |
| } |
| } |
| |
| // ES6 [[Set]] operation. |
| TF_BUILTIN(SetProperty, CodeStubAssembler) { |
| auto context = Parameter<Context>(Descriptor::kContext); |
| auto receiver = Parameter<Object>(Descriptor::kReceiver); |
| auto key = Parameter<Object>(Descriptor::kKey); |
| auto value = Parameter<Object>(Descriptor::kValue); |
| |
| KeyedStoreGenericGenerator::SetProperty(state(), context, receiver, key, |
| value, LanguageMode::kStrict); |
| } |
| |
| // ES6 CreateDataProperty(), specialized for the case where objects are still |
| // being initialized, and have not yet been made accessible to the user. Thus, |
| // any operation here should be unobservable until after the object has been |
| // returned. |
| TF_BUILTIN(SetPropertyInLiteral, CodeStubAssembler) { |
| auto context = Parameter<Context>(Descriptor::kContext); |
| auto receiver = Parameter<JSObject>(Descriptor::kReceiver); |
| auto key = Parameter<Object>(Descriptor::kKey); |
| auto value = Parameter<Object>(Descriptor::kValue); |
| |
| KeyedStoreGenericGenerator::SetPropertyInLiteral(state(), context, receiver, |
| key, value); |
| } |
| |
| TF_BUILTIN(InstantiateAsmJs, CodeStubAssembler) { |
| Label tailcall_to_function(this); |
| auto context = Parameter<Context>(Descriptor::kContext); |
| auto new_target = Parameter<Object>(Descriptor::kNewTarget); |
| auto arg_count = |
| UncheckedParameter<Int32T>(Descriptor::kActualArgumentsCount); |
| auto function = Parameter<JSFunction>(Descriptor::kTarget); |
| |
| // Retrieve arguments from caller (stdlib, foreign, heap). |
| CodeStubArguments args(this, arg_count); |
| TNode<Object> stdlib = args.GetOptionalArgumentValue(0); |
| TNode<Object> foreign = args.GetOptionalArgumentValue(1); |
| TNode<Object> heap = args.GetOptionalArgumentValue(2); |
| |
| // Call runtime, on success just pass the result to the caller and pop all |
| // arguments. A smi 0 is returned on failure, an object on success. |
| TNode<Object> maybe_result_or_smi_zero = CallRuntime( |
| Runtime::kInstantiateAsmJs, context, function, stdlib, foreign, heap); |
| GotoIf(TaggedIsSmi(maybe_result_or_smi_zero), &tailcall_to_function); |
| |
| #ifdef V8_NO_ARGUMENTS_ADAPTOR |
| TNode<SharedFunctionInfo> shared = LoadJSFunctionSharedFunctionInfo(function); |
| TNode<Int32T> parameter_count = |
| UncheckedCast<Int32T>(LoadSharedFunctionInfoFormalParameterCount(shared)); |
| // This builtin intercepts a call to {function}, where the number of arguments |
| // pushed is the maximum of actual arguments count and formal parameters |
| // count. |
| Label argc_lt_param_count(this), argc_ge_param_count(this); |
| Branch(Int32LessThan(arg_count, parameter_count), &argc_lt_param_count, |
| &argc_ge_param_count); |
| BIND(&argc_lt_param_count); |
| PopAndReturn(Int32Add(parameter_count, Int32Constant(1)), |
| maybe_result_or_smi_zero); |
| BIND(&argc_ge_param_count); |
| #endif |
| args.PopAndReturn(maybe_result_or_smi_zero); |
| |
| BIND(&tailcall_to_function); |
| // On failure, tail call back to regular JavaScript by re-calling the given |
| // function which has been reset to the compile lazy builtin. |
| TNode<Code> code = CAST(LoadObjectField(function, JSFunction::kCodeOffset)); |
| TailCallJSCode(code, context, function, new_target, arg_count); |
| } |
| |
| } // namespace internal |
| } // namespace v8 |
