// Copyright 2017 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_OBJECTS_ARGUMENTS_INL_H_
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#define V8_OBJECTS_ARGUMENTS_INL_H_
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#include "src/objects/arguments.h"
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#include "src/contexts-inl.h"
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#include "src/isolate-inl.h"
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#include "src/objects-inl.h"
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#include "src/objects/fixed-array-inl.h"
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// Has to be the last include (doesn't have include guards):
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#include "src/objects/object-macros.h"
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namespace v8 {
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namespace internal {
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CAST_ACCESSOR(AliasedArgumentsEntry)
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CAST_ACCESSOR(JSArgumentsObject)
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CAST_ACCESSOR(SloppyArgumentsElements)
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SMI_ACCESSORS(AliasedArgumentsEntry, aliased_context_slot, kAliasedContextSlot)
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Context* SloppyArgumentsElements::context() {
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return Context::cast(get(kContextIndex));
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}
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FixedArray* SloppyArgumentsElements::arguments() {
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return FixedArray::cast(get(kArgumentsIndex));
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}
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void SloppyArgumentsElements::set_arguments(FixedArray* arguments) {
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set(kArgumentsIndex, arguments);
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}
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uint32_t SloppyArgumentsElements::parameter_map_length() {
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return length() - kParameterMapStart;
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}
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Object* SloppyArgumentsElements::get_mapped_entry(uint32_t entry) {
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return get(entry + kParameterMapStart);
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}
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void SloppyArgumentsElements::set_mapped_entry(uint32_t entry, Object* object) {
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set(entry + kParameterMapStart, object);
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}
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// TODO(danno): This shouldn't be inline here, but to defensively avoid
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// regressions associated with the fix for the bug 778574, it's staying that way
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// until the splice implementation in builtin-arrays.cc can be removed and this
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// function can be moved into runtime-arrays.cc near its other usage.
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bool JSSloppyArgumentsObject::GetSloppyArgumentsLength(Isolate* isolate,
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Handle<JSObject> object,
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int* out) {
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Context* context = *isolate->native_context();
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Map* map = object->map();
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if (map != context->sloppy_arguments_map() &&
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map != context->strict_arguments_map() &&
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map != context->fast_aliased_arguments_map()) {
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return false;
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}
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DCHECK(object->HasFastElements() || object->HasFastArgumentsElements());
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Object* len_obj = object->InObjectPropertyAt(JSArgumentsObject::kLengthIndex);
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if (!len_obj->IsSmi()) return false;
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*out = Max(0, Smi::ToInt(len_obj));
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FixedArray* parameters = FixedArray::cast(object->elements());
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if (object->HasSloppyArgumentsElements()) {
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FixedArray* arguments = FixedArray::cast(parameters->get(1));
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return *out <= arguments->length();
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}
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return *out <= parameters->length();
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}
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} // namespace internal
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} // namespace v8
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#include "src/objects/object-macros-undef.h"
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#endif // V8_OBJECTS_ARGUMENTS_INL_H_
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