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ReceiverGuard-inl.h
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ReceiverGuard-inl.h
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef vm_ReceiverGuard_inl_h
#define vm_ReceiverGuard_inl_h
#include "vm/ReceiverGuard.h"
#include "builtin/TypedObject.h"
#include "vm/JSObject.h"
#include "vm/ShapedObject.h"
#include "vm/UnboxedObject.h"
namespace js {
MOZ_ALWAYS_INLINE
ReceiverGuard::ReceiverGuard(JSObject* obj) : group(nullptr), shape(nullptr) {
if (!obj->isNative()) {
if (obj->is<UnboxedPlainObject>()) {
group = obj->group();
if (UnboxedExpandoObject* expando =
obj->as<UnboxedPlainObject>().maybeExpando()) {
shape = expando->lastProperty();
}
return;
}
if (obj->is<TypedObject>()) {
group = obj->group();
return;
}
}
shape = obj->as<ShapedObject>().shape();
}
MOZ_ALWAYS_INLINE
ReceiverGuard::ReceiverGuard(ObjectGroup* group, Shape* shape)
: group(group), shape(shape) {
if (group) {
const Class* clasp = group->clasp();
if (clasp == &UnboxedPlainObject::class_) {
// Keep both group and shape.
} else if (IsTypedObjectClass(clasp)) {
this->shape = nullptr;
} else {
this->group = nullptr;
}
}
}
} // namespace js
#endif /* vm_ReceiverGuard_inl_h */