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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/. */
/*
* JS object implementation.
*/
#include "vm/PlainObject-inl.h"
#include "mozilla/Assertions.h" // MOZ_ASSERT
#include "mozilla/Maybe.h" // mozilla::Maybe
#include "jspubtd.h" // JSProto_Object
#include "gc/AllocKind.h" // js::gc::AllocKind
#include "vm/JSContext.h" // JSContext
#include "vm/JSFunction.h" // JSFunction
#include "vm/JSObject.h" // JSObject, js::GetPrototypeFromConstructor
#include "vm/ObjectGroup.h" // js::ObjectGroup, js::{Generic,Singleton,Tenured}Object
#include "vm/TaggedProto.h" // js::TaggedProto
#include "vm/JSObject-inl.h" // js::GuessObjectGCKind, js::NewObjectWithGroup, js::NewObjectGCKind
using JS::Handle;
using JS::Rooted;
using js::GenericObject;
using js::GuessObjectGCKind;
using js::NewObjectGCKind;
using js::NewObjectKind;
using js::NewObjectWithGroup;
using js::ObjectGroup;
using js::PlainObject;
using js::TaggedProto;
using js::TenuredObject;
PlainObject* js::CreateThisForFunction(JSContext* cx,
Handle<JSFunction*> callee,
Handle<JSObject*> newTarget,
NewObjectKind newKind) {
MOZ_ASSERT(cx->realm() == callee->realm());
MOZ_ASSERT(!callee->constructorNeedsUninitializedThis());
Rooted<JSObject*> proto(cx);
if (!GetPrototypeFromConstructor(cx, newTarget, JSProto_Object, &proto)) {
return nullptr;
}
PlainObject* res;
if (proto) {
Rooted<ObjectGroup*> group(
cx, ObjectGroup::defaultNewGroup(cx, &PlainObject::class_,
TaggedProto(proto)));
if (!group) {
return nullptr;
}
js::gc::AllocKind allocKind = NewObjectGCKind(&PlainObject::class_);
res = NewObjectWithGroup<PlainObject>(cx, group, allocKind, newKind);
} else {
res = NewBuiltinClassInstanceWithKind<PlainObject>(cx, newKind);
}
MOZ_ASSERT_IF(res, res->nonCCWRealm() == callee->realm());
return res;
}
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