1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2 * vim: set ts=8 sts=2 et sw=2 tw=80:
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
7 #ifndef vm_ObjectFlags_inl_h
8 #define vm_ObjectFlags_inl_h
10 #include "vm/ObjectFlags.h"
12 #include "builtin/Array.h"
13 #include "vm/JSAtomState.h"
14 #include "vm/JSContext.h"
15 #include "vm/PlainObject.h"
16 #include "vm/PropertyInfo.h"
20 MOZ_ALWAYS_INLINE ObjectFlags
21 GetObjectFlagsForNewProperty(const JSClass
* clasp
, ObjectFlags flags
, jsid id
,
22 PropertyFlags propFlags
, JSContext
* cx
) {
24 if (IdIsIndex(id
, &index
)) {
25 flags
.setFlag(ObjectFlag::Indexed
);
26 } else if (id
.isSymbol() && id
.toSymbol()->isInterestingSymbol()) {
27 flags
.setFlag(ObjectFlag::HasInterestingSymbol
);
30 if ((!propFlags
.isDataProperty() || !propFlags
.writable()) &&
31 clasp
== &PlainObject::class_
&& !id
.isAtom(cx
->names().proto_
)) {
32 flags
.setFlag(ObjectFlag::HasNonWritableOrAccessorPropExclProto
);
35 // https://tc39.es/ecma262/multipage/ordinary-and-exotic-objects-behaviours.html#sec-proxy-object-internal-methods-and-internal-slots-get-p-receiver
36 // Proxy.[[Get]] or [[Set]] Step 9
37 if (!propFlags
.configurable()) {
38 MOZ_ASSERT(clasp
->isNativeObject());
39 // NOTE: there is a hole which this flag does not cover, which is if the
40 // class has a resolve hook which could lazily define a non-configurable
41 // non-writable property. We can just look this up directly though in the
43 if (propFlags
.isDataProperty() && !propFlags
.writable()) {
44 flags
.setFlag(ObjectFlag::NeedsProxyGetSetResultValidation
);
45 } else if (propFlags
.isAccessorProperty()) {
46 // This will cover us for both get trap validation and set trap
47 // validation. We could be more aggressive, because what we really
48 // care about is if there is a getter but not a setter and vice
49 // versa, but the first pass at doing that resulted in test
50 // failures. We'll need to work on that as a follow-up if it is
52 flags
.setFlag(ObjectFlag::NeedsProxyGetSetResultValidation
);
56 if (propFlags
.enumerable()) {
57 flags
.setFlag(ObjectFlag::HasEnumerable
);
63 // When reusing another shape's PropMap, we need to copy the object flags that
64 // are based on property information. This is equivalent to (but faster than)
65 // calling GetObjectFlagsForNewProperty for all properties in the map.
66 inline ObjectFlags
CopyPropMapObjectFlags(ObjectFlags dest
,
68 if (source
.hasFlag(ObjectFlag::Indexed
)) {
69 dest
.setFlag(ObjectFlag::Indexed
);
71 if (source
.hasFlag(ObjectFlag::HasInterestingSymbol
)) {
72 dest
.setFlag(ObjectFlag::HasInterestingSymbol
);
74 if (source
.hasFlag(ObjectFlag::HasNonWritableOrAccessorPropExclProto
)) {
75 dest
.setFlag(ObjectFlag::HasNonWritableOrAccessorPropExclProto
);
77 if (source
.hasFlag(ObjectFlag::NeedsProxyGetSetResultValidation
)) {
78 dest
.setFlag(ObjectFlag::NeedsProxyGetSetResultValidation
);
85 #endif /* vm_ObjectFlags_inl_h */