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// 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/execution/isolate-inl.h"
#include "src/objects/contexts-inl.h"
#include "src/objects/fixed-array-inl.h"
#include "src/objects/objects-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)
TQ_OBJECT_CONSTRUCTORS_IMPL(JSArgumentsObject)
TQ_OBJECT_CONSTRUCTORS_IMPL(AliasedArgumentsEntry)
CAST_ACCESSOR(SloppyArgumentsElements)
TQ_SMI_ACCESSORS(AliasedArgumentsEntry, aliased_context_slot)
DEF_GETTER(SloppyArgumentsElements, context, Context) {
return TaggedField<Context>::load(isolate, *this,
OffsetOfElementAt(kContextIndex));
}
DEF_GETTER(SloppyArgumentsElements, arguments, FixedArray) {
return TaggedField<FixedArray>::load(isolate, *this,
OffsetOfElementAt(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_