// 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. #ifndef V8_OBJECTS_ARGUMENTS_INL_H_ #define V8_OBJECTS_ARGUMENTS_INL_H_ #include "src/objects/arguments.h" #include "src/contexts-inl.h" #include "src/isolate-inl.h" #include "src/objects-inl.h" #include "src/objects/fixed-array-inl.h" // Has to be the last include (doesn't have include guards): #include "src/objects/object-macros.h" namespace v8 { namespace internal { OBJECT_CONSTRUCTORS_IMPL(SloppyArgumentsElements, FixedArray) OBJECT_CONSTRUCTORS_IMPL(JSArgumentsObject, JSObject) OBJECT_CONSTRUCTORS_IMPL(AliasedArgumentsEntry, Struct) CAST_ACCESSOR(AliasedArgumentsEntry) CAST_ACCESSOR(SloppyArgumentsElements) CAST_ACCESSOR(JSArgumentsObject) SMI_ACCESSORS(AliasedArgumentsEntry, aliased_context_slot, kAliasedContextSlotOffset) Context SloppyArgumentsElements::context() { return Context::cast(get(kContextIndex)); } FixedArray SloppyArgumentsElements::arguments() { return FixedArray::cast(get(kArgumentsIndex)); } void SloppyArgumentsElements::set_arguments(FixedArray arguments) { set(kArgumentsIndex, arguments); } uint32_t SloppyArgumentsElements::parameter_map_length() { return length() - kParameterMapStart; } Object SloppyArgumentsElements::get_mapped_entry(uint32_t entry) { return get(entry + kParameterMapStart); } void SloppyArgumentsElements::set_mapped_entry(uint32_t entry, Object object) { set(entry + kParameterMapStart, object); } // TODO(danno): This shouldn't be inline here, but to defensively avoid // regressions associated with the fix for the bug 778574, it's staying that way // until the splice implementation in builtin-arrays.cc can be removed and this // function can be moved into runtime-arrays.cc near its other usage. bool JSSloppyArgumentsObject::GetSloppyArgumentsLength(Isolate* isolate, Handle<JSObject> object, int* out) { Context context = *isolate->native_context(); Map map = object->map(); if (map != context->sloppy_arguments_map() && map != context->strict_arguments_map() && map != context->fast_aliased_arguments_map()) { return false; } DCHECK(object->HasFastElements() || object->HasFastArgumentsElements()); Object len_obj = object->InObjectPropertyAt(JSArgumentsObjectWithLength::kLengthIndex); if (!len_obj->IsSmi()) return false; *out = Max(0, Smi::ToInt(len_obj)); FixedArray parameters = FixedArray::cast(object->elements()); if (object->HasSloppyArgumentsElements()) { FixedArray arguments = FixedArray::cast(parameters->get(1)); return *out <= arguments->length(); } return *out <= parameters->length(); } } // namespace internal } // namespace v8 #include "src/objects/object-macros-undef.h" #endif // V8_OBJECTS_ARGUMENTS_INL_H_