https://github.com/mozilla/gecko-dev
Tip revision: ae1e734d26dfb74a38e31eed6c9f95c4993f389f authored by ffxbld on 19 October 2016, 23:54:50 UTC
Added FENNEC_49_0_2_RELEASE FENNEC_49_0_2_BUILD2 tag(s) for changeset b8cfe2060804. DONTBUILD CLOSED TREE a=release
Added FENNEC_49_0_2_RELEASE FENNEC_49_0_2_BUILD2 tag(s) for changeset b8cfe2060804. DONTBUILD CLOSED TREE a=release
Tip revision: ae1e734
jsobjinlines.h
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: set ts=8 sts=4 et sw=4 tw=99:
* 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 jsobjinlines_h
#define jsobjinlines_h
#include "jsobj.h"
#include "mozilla/DebugOnly.h"
#include "jsfriendapi.h"
#include "jsfun.h"
#include "builtin/MapObject.h"
#include "builtin/TypedObject.h"
#include "gc/Allocator.h"
#include "vm/ArrayObject.h"
#include "vm/DateObject.h"
#include "vm/NumberObject.h"
#include "vm/Probes.h"
#include "vm/ScopeObject.h"
#include "vm/StringObject.h"
#include "vm/TypedArrayCommon.h"
#include "jsatominlines.h"
#include "jscompartmentinlines.h"
#include "jsgcinlines.h"
#include "vm/TypeInference-inl.h"
namespace js {
// This is needed here for ensureShape() below.
inline bool
MaybeConvertUnboxedObjectToNative(ExclusiveContext* cx, JSObject* obj)
{
if (obj->is<UnboxedPlainObject>())
return UnboxedPlainObject::convertToNative(cx->asJSContext(), obj);
if (obj->is<UnboxedArrayObject>())
return UnboxedArrayObject::convertToNative(cx->asJSContext(), obj);
return true;
}
} // namespace js
inline js::Shape*
JSObject::maybeShape() const
{
if (is<js::UnboxedPlainObject>() || is<js::UnboxedArrayObject>())
return nullptr;
return *reinterpret_cast<js::Shape**>(uintptr_t(this) + offsetOfShape());
}
inline js::Shape*
JSObject::ensureShape(js::ExclusiveContext* cx)
{
if (!js::MaybeConvertUnboxedObjectToNative(cx, this))
return nullptr;
js::Shape* shape = maybeShape();
MOZ_ASSERT(shape);
return shape;
}
inline void
JSObject::finalize(js::FreeOp* fop)
{
js::probes::FinalizeObject(this);
#ifdef DEBUG
MOZ_ASSERT(isTenured());
if (!IsBackgroundFinalized(asTenured().getAllocKind())) {
/* Assert we're on the main thread. */
MOZ_ASSERT(CurrentThreadCanAccessRuntime(fop->runtime()));
}
#endif
const js::Class* clasp = getClass();
if (clasp->hasFinalize())
clasp->doFinalize(fop, this);
if (!clasp->isNative())
return;
js::NativeObject* nobj = &as<js::NativeObject>();
if (nobj->hasDynamicSlots())
fop->free_(nobj->slots_);
if (nobj->hasDynamicElements()) {
js::ObjectElements* elements = nobj->getElementsHeader();
if (elements->isCopyOnWrite()) {
if (elements->ownerObject() == this) {
// Don't free the elements until object finalization finishes,
// so that other objects can access these elements while they
// are themselves finalized.
fop->freeLater(elements);
}
} else {
fop->free_(elements);
}
}
// For dictionary objects (which must be native), it's possible that
// unreachable shapes may be marked whose listp points into this object.
// In case this happens, null out the shape's pointer here so that a moving
// GC will not try to access the dead object.
if (nobj->shape_->listp == &nobj->shape_)
nobj->shape_->listp = nullptr;
}
/* static */ inline bool
JSObject::setSingleton(js::ExclusiveContext* cx, js::HandleObject obj)
{
MOZ_ASSERT_IF(cx->isJSContext(), !IsInsideNursery(obj));
js::ObjectGroup* group = js::ObjectGroup::lazySingletonGroup(cx, obj->getClass(),
obj->taggedProto());
if (!group)
return false;
obj->group_ = group;
return true;
}
inline js::ObjectGroup*
JSObject::getGroup(JSContext* cx)
{
MOZ_ASSERT(cx->compartment() == compartment());
if (hasLazyGroup()) {
JS::RootedObject self(cx, this);
if (cx->compartment() != compartment())
MOZ_CRASH();
return makeLazyGroup(cx, self);
}
return group_;
}
inline void
JSObject::setGroup(js::ObjectGroup* group)
{
MOZ_RELEASE_ASSERT(group);
MOZ_ASSERT(!isSingleton());
group_ = group;
}
/*** Standard internal methods *******************************************************************/
inline bool
js::GetPrototype(JSContext* cx, js::HandleObject obj, js::MutableHandleObject protop)
{
if (obj->hasDynamicPrototype()) {
MOZ_ASSERT(obj->is<js::ProxyObject>());
return js::Proxy::getPrototype(cx, obj, protop);
}
protop.set(obj->taggedProto().toObjectOrNull());
return true;
}
inline bool
js::IsExtensible(ExclusiveContext* cx, HandleObject obj, bool* extensible)
{
if (obj->is<ProxyObject>()) {
if (!cx->shouldBeJSContext())
return false;
return Proxy::isExtensible(cx->asJSContext(), obj, extensible);
}
*extensible = obj->nonProxyIsExtensible();
return true;
}
inline bool
js::HasProperty(JSContext* cx, HandleObject obj, PropertyName* name, bool* found)
{
RootedId id(cx, NameToId(name));
return HasProperty(cx, obj, id, found);
}
inline bool
js::GetElement(JSContext* cx, HandleObject obj, HandleValue receiver, uint32_t index,
MutableHandleValue vp)
{
RootedId id(cx);
if (!IndexToId(cx, index, &id))
return false;
return GetProperty(cx, obj, receiver, id, vp);
}
inline bool
js::GetElement(JSContext* cx, HandleObject obj, HandleObject receiver, uint32_t index,
MutableHandleValue vp)
{
RootedValue receiverValue(cx, ObjectValue(*receiver));
return GetElement(cx, obj, receiverValue, index, vp);
}
inline bool
js::GetElementNoGC(JSContext* cx, JSObject* obj, const Value& receiver, uint32_t index, Value* vp)
{
if (obj->getOpsGetProperty())
return false;
if (index > JSID_INT_MAX)
return false;
return GetPropertyNoGC(cx, obj, receiver, INT_TO_JSID(index), vp);
}
inline bool
js::GetElementNoGC(JSContext* cx, JSObject* obj, JSObject* receiver, uint32_t index, Value* vp)
{
return GetElementNoGC(cx, obj, ObjectValue(*receiver), index, vp);
}
inline bool
js::DeleteProperty(JSContext* cx, HandleObject obj, HandleId id, ObjectOpResult& result)
{
MarkTypePropertyNonData(cx, obj, id);
if (DeletePropertyOp op = obj->getOpsDeleteProperty())
return op(cx, obj, id, result);
return NativeDeleteProperty(cx, obj.as<NativeObject>(), id, result);
}
inline bool
js::DeleteElement(JSContext* cx, HandleObject obj, uint32_t index, ObjectOpResult& result)
{
RootedId id(cx);
if (!IndexToId(cx, index, &id))
return false;
return DeleteProperty(cx, obj, id, result);
}
/* * */
inline bool
JSObject::isQualifiedVarObj() const
{
if (is<js::DebugScopeObject>())
return as<js::DebugScopeObject>().scope().isQualifiedVarObj();
bool rv = hasAllFlags(js::BaseShape::QUALIFIED_VAROBJ);
MOZ_ASSERT_IF(rv,
is<js::GlobalObject>() ||
is<js::CallObject>() ||
is<js::ModuleEnvironmentObject>() ||
is<js::NonSyntacticVariablesObject>() ||
(is<js::DynamicWithObject>() && !as<js::DynamicWithObject>().isSyntactic()));
return rv;
}
inline bool
JSObject::isUnqualifiedVarObj() const
{
if (is<js::DebugScopeObject>())
return as<js::DebugScopeObject>().scope().isUnqualifiedVarObj();
return is<js::GlobalObject>() || is<js::NonSyntacticVariablesObject>();
}
namespace js {
inline bool
ClassCanHaveFixedData(const Class* clasp)
{
// Normally, the number of fixed slots given an object is the maximum
// permitted for its size class. For array buffers and non-shared typed
// arrays we only use enough to cover the class reserved slots, so that
// the remaining space in the object's allocation is available for the
// buffer's data.
return !clasp->isNative()
|| clasp == &js::ArrayBufferObject::class_
|| js::IsTypedArrayClass(clasp);
}
// This function is meant to be called from allocation fast paths.
//
// If we do have an allocation metadata builder, it can cause a GC, so the object
// must be rooted. The usual way to do this would be to make our callers pass a
// HandleObject, but that would require them to pay the cost of rooting the
// object unconditionally, even though collecting metadata is rare. Instead,
// SetNewObjectMetadata's contract is that the caller must use the pointer
// returned in place of the pointer passed. If a GC occurs, the returned pointer
// may be the passed pointer, relocated by GC. If no GC could occur, it's just
// passed through. We root nothing unless necessary.
static MOZ_ALWAYS_INLINE MOZ_MUST_USE JSObject*
SetNewObjectMetadata(ExclusiveContext* cxArg, JSObject* obj)
{
MOZ_ASSERT(!cxArg->compartment()->hasObjectPendingMetadata());
// The metadata builder is invoked for each object created on the main
// thread, except when analysis/compilation is active, to avoid recursion.
if (JSContext* cx = cxArg->maybeJSContext()) {
if (MOZ_UNLIKELY((size_t)cx->compartment()->hasAllocationMetadataBuilder()) &&
!cx->zone()->suppressAllocationMetadataBuilder)
{
// Don't collect metadata on objects that represent metadata.
AutoSuppressAllocationMetadataBuilder suppressMetadata(cx);
RootedObject rooted(cx, obj);
cx->compartment()->setNewObjectMetadata(cx, rooted);
return rooted;
}
}
return obj;
}
} // namespace js
/* static */ inline JSObject*
JSObject::create(js::ExclusiveContext* cx, js::gc::AllocKind kind, js::gc::InitialHeap heap,
js::HandleShape shape, js::HandleObjectGroup group)
{
MOZ_ASSERT(shape && group);
MOZ_ASSERT(group->clasp() == shape->getObjectClass());
MOZ_ASSERT(group->clasp() != &js::ArrayObject::class_);
MOZ_ASSERT_IF(!js::ClassCanHaveFixedData(group->clasp()),
js::gc::GetGCKindSlots(kind, group->clasp()) == shape->numFixedSlots());
MOZ_ASSERT_IF(group->clasp()->flags & JSCLASS_BACKGROUND_FINALIZE,
IsBackgroundFinalized(kind));
MOZ_ASSERT_IF(group->clasp()->hasFinalize(),
heap == js::gc::TenuredHeap ||
(group->clasp()->flags & JSCLASS_SKIP_NURSERY_FINALIZE));
MOZ_ASSERT_IF(group->hasUnanalyzedPreliminaryObjects(),
heap == js::gc::TenuredHeap);
MOZ_ASSERT(!cx->compartment()->hasObjectPendingMetadata());
// Non-native classes cannot have reserved slots or private data, and the
// objects can't have any fixed slots, for compatibility with
// GetReservedOrProxyPrivateSlot.
MOZ_ASSERT_IF(!group->clasp()->isNative(), JSCLASS_RESERVED_SLOTS(group->clasp()) == 0);
MOZ_ASSERT_IF(!group->clasp()->isNative(), !group->clasp()->hasPrivate());
MOZ_ASSERT_IF(!group->clasp()->isNative(), shape->numFixedSlots() == 0);
MOZ_ASSERT_IF(!group->clasp()->isNative(), shape->slotSpan() == 0);
const js::Class* clasp = group->clasp();
size_t nDynamicSlots = 0;
if (group->clasp()->isNative()) {
nDynamicSlots = js::NativeObject::dynamicSlotsCount(shape->numFixedSlots(),
shape->slotSpan(), clasp);
} else if (group->clasp()->isProxy()) {
// Proxy objects overlay the |slots| field with a ProxyValueArray.
MOZ_ASSERT(sizeof(js::detail::ProxyValueArray) % sizeof(js::HeapSlot) == 0);
nDynamicSlots = sizeof(js::detail::ProxyValueArray) / sizeof(js::HeapSlot);
}
JSObject* obj = js::Allocate<JSObject>(cx, kind, nDynamicSlots, heap, clasp);
if (!obj)
return nullptr;
obj->group_.init(group);
obj->setInitialShapeMaybeNonNative(shape);
// Note: slots are created and assigned internally by Allocate<JSObject>.
obj->setInitialElementsMaybeNonNative(js::emptyObjectElements);
if (clasp->hasPrivate())
obj->as<js::NativeObject>().privateRef(shape->numFixedSlots()) = nullptr;
if (size_t span = shape->slotSpan())
obj->as<js::NativeObject>().initializeSlotRange(0, span);
// JSFunction's fixed slots expect POD-style initialization.
if (group->clasp()->isJSFunction()) {
MOZ_ASSERT(kind == js::gc::AllocKind::FUNCTION ||
kind == js::gc::AllocKind::FUNCTION_EXTENDED);
size_t size =
kind == js::gc::AllocKind::FUNCTION ? sizeof(JSFunction) : sizeof(js::FunctionExtended);
memset(obj->as<JSFunction>().fixedSlots(), 0, size - sizeof(js::NativeObject));
if (kind == js::gc::AllocKind::FUNCTION_EXTENDED) {
// SetNewObjectMetadata may gc, which will be unhappy if flags &
// EXTENDED doesn't match the arena's AllocKind.
obj->as<JSFunction>().setFlags(JSFunction::EXTENDED);
}
}
if (group->clasp()->shouldDelayMetadataBuilder())
cx->compartment()->setObjectPendingMetadata(cx, obj);
else
obj = SetNewObjectMetadata(cx, obj);
js::gc::TraceCreateObject(obj);
return obj;
}
inline void
JSObject::setInitialShapeMaybeNonNative(js::Shape* shape)
{
static_cast<js::NativeObject*>(this)->shape_.init(shape);
}
inline void
JSObject::setShapeMaybeNonNative(js::Shape* shape)
{
MOZ_ASSERT(!is<js::UnboxedPlainObject>());
static_cast<js::NativeObject*>(this)->shape_ = shape;
}
inline void
JSObject::setInitialSlotsMaybeNonNative(js::HeapSlot* slots)
{
static_cast<js::NativeObject*>(this)->slots_ = slots;
}
inline void
JSObject::setInitialElementsMaybeNonNative(js::HeapSlot* elements)
{
static_cast<js::NativeObject*>(this)->elements_ = elements;
}
inline js::GlobalObject&
JSObject::global() const
{
/*
* The global is read-barriered so that it is kept live by access through
* the JSCompartment. When accessed through a JSObject, however, the global
* will be already be kept live by the black JSObject's parent pointer, so
* does not need to be read-barriered.
*/
return *compartment()->unsafeUnbarrieredMaybeGlobal();
}
inline bool
JSObject::isOwnGlobal() const
{
return &global() == this;
}
inline bool
JSObject::hasAllFlags(js::BaseShape::Flag flags) const
{
MOZ_ASSERT(flags);
if (js::Shape* shape = maybeShape())
return shape->hasAllObjectFlags(flags);
return false;
}
inline bool
JSObject::nonProxyIsExtensible() const
{
MOZ_ASSERT(!uninlinedIsProxy());
// [[Extensible]] for ordinary non-proxy objects is an object flag.
return !hasAllFlags(js::BaseShape::NOT_EXTENSIBLE);
}
inline bool
JSObject::isBoundFunction() const
{
return is<JSFunction>() && as<JSFunction>().isBoundFunction();
}
inline bool
JSObject::watched() const
{
return hasAllFlags(js::BaseShape::WATCHED);
}
inline bool
JSObject::isDelegate() const
{
return hasAllFlags(js::BaseShape::DELEGATE);
}
inline bool
JSObject::hasUncacheableProto() const
{
return hasAllFlags(js::BaseShape::UNCACHEABLE_PROTO);
}
inline bool
JSObject::hadElementsAccess() const
{
return hasAllFlags(js::BaseShape::HAD_ELEMENTS_ACCESS);
}
inline bool
JSObject::isIndexed() const
{
return hasAllFlags(js::BaseShape::INDEXED);
}
inline bool
JSObject::staticPrototypeIsImmutable() const
{
MOZ_ASSERT(hasStaticPrototype());
return hasAllFlags(js::BaseShape::IMMUTABLE_PROTOTYPE);
}
inline bool
JSObject::isIteratedSingleton() const
{
return hasAllFlags(js::BaseShape::ITERATED_SINGLETON);
}
inline bool
JSObject::isNewGroupUnknown() const
{
return hasAllFlags(js::BaseShape::NEW_GROUP_UNKNOWN);
}
inline bool
JSObject::wasNewScriptCleared() const
{
return hasAllFlags(js::BaseShape::NEW_SCRIPT_CLEARED);
}
namespace js {
static MOZ_ALWAYS_INLINE bool
IsFunctionObject(const js::Value& v)
{
return v.isObject() && v.toObject().is<JSFunction>();
}
static MOZ_ALWAYS_INLINE bool
IsFunctionObject(const js::Value& v, JSFunction** fun)
{
if (v.isObject() && v.toObject().is<JSFunction>()) {
*fun = &v.toObject().as<JSFunction>();
return true;
}
return false;
}
static MOZ_ALWAYS_INLINE bool
IsNativeFunction(const js::Value& v)
{
JSFunction* fun;
return IsFunctionObject(v, &fun) && fun->isNative();
}
static MOZ_ALWAYS_INLINE bool
IsNativeFunction(const js::Value& v, JSFunction** fun)
{
return IsFunctionObject(v, fun) && (*fun)->isNative();
}
static MOZ_ALWAYS_INLINE bool
IsNativeFunction(const js::Value& v, JSNative native)
{
JSFunction* fun;
return IsFunctionObject(v, &fun) && fun->maybeNative() == native;
}
/*
* When we have an object of a builtin class, we don't quite know what its
* valueOf/toString methods are, since these methods may have been overwritten
* or shadowed. However, we can still do better than the general case by
* hard-coding the necessary properties for us to find the native we expect.
*
* TODO: a per-thread shape-based cache would be faster and simpler.
*/
static MOZ_ALWAYS_INLINE bool
ClassMethodIsNative(JSContext* cx, NativeObject* obj, const Class* clasp, jsid methodid, JSNative native)
{
MOZ_ASSERT(obj->getClass() == clasp);
Value v;
if (!HasDataProperty(cx, obj, methodid, &v)) {
JSObject* proto = obj->staticPrototype();
if (!proto || proto->getClass() != clasp || !HasDataProperty(cx, &proto->as<NativeObject>(), methodid, &v))
return false;
}
return IsNativeFunction(v, native);
}
// Return whether looking up 'valueOf' on 'obj' definitely resolves to the
// original Object.prototype.valueOf. The method may conservatively return
// 'false' in the case of proxies or other non-native objects.
static MOZ_ALWAYS_INLINE bool
HasObjectValueOf(JSObject* obj, JSContext* cx)
{
if (obj->is<ProxyObject>() || !obj->isNative())
return false;
jsid valueOf = NameToId(cx->names().valueOf);
Value v;
while (!HasDataProperty(cx, &obj->as<NativeObject>(), valueOf, &v)) {
obj = obj->staticPrototype();
if (!obj || obj->is<ProxyObject>() || !obj->isNative())
return false;
}
return IsNativeFunction(v, obj_valueOf);
}
/* ES6 draft rev 28 (2014 Oct 14) 7.1.14 */
inline bool
ToPropertyKey(JSContext* cx, Value argument, MutableHandleId result)
{
// Steps 1-2.
RootedValue key(cx, argument);
if (!ToPrimitive(cx, JSTYPE_STRING, &key))
return false;
// Steps 3-4.
return ValueToId<CanGC>(cx, key, result);
}
/*
* Return true if this is a compiler-created internal function accessed by
* its own object. Such a function object must not be accessible to script
* or embedding code.
*/
inline bool
IsInternalFunctionObject(JSObject& funobj)
{
JSFunction& fun = funobj.as<JSFunction>();
return fun.isInterpreted() && !fun.environment();
}
/*
* Make an object with the specified prototype. If parent is null, it will
* default to the prototype's global if the prototype is non-null.
*/
JSObject*
NewObjectWithGivenTaggedProto(ExclusiveContext* cx, const Class* clasp, Handle<TaggedProto> proto,
gc::AllocKind allocKind, NewObjectKind newKind,
uint32_t initialShapeFlags = 0);
inline JSObject*
NewObjectWithGivenTaggedProto(ExclusiveContext* cx, const Class* clasp, Handle<TaggedProto> proto,
NewObjectKind newKind = GenericObject,
uint32_t initialShapeFlags = 0)
{
gc::AllocKind allocKind = gc::GetGCObjectKind(clasp);
return NewObjectWithGivenTaggedProto(cx, clasp, proto, allocKind, newKind, initialShapeFlags);
}
template <typename T>
inline T*
NewObjectWithGivenTaggedProto(ExclusiveContext* cx, Handle<TaggedProto> proto,
NewObjectKind newKind = GenericObject,
uint32_t initialShapeFlags = 0)
{
JSObject* obj = NewObjectWithGivenTaggedProto(cx, &T::class_, proto, newKind,
initialShapeFlags);
return obj ? &obj->as<T>() : nullptr;
}
template <typename T>
inline T*
NewObjectWithNullTaggedProto(ExclusiveContext* cx, NewObjectKind newKind = GenericObject,
uint32_t initialShapeFlags = 0)
{
Rooted<TaggedProto> nullProto(cx, TaggedProto(nullptr));
return NewObjectWithGivenTaggedProto<T>(cx, nullProto, newKind, initialShapeFlags);
}
inline JSObject*
NewObjectWithGivenProto(ExclusiveContext* cx, const Class* clasp, HandleObject proto,
gc::AllocKind allocKind, NewObjectKind newKind)
{
return NewObjectWithGivenTaggedProto(cx, clasp, AsTaggedProto(proto), allocKind,
newKind);
}
inline JSObject*
NewObjectWithGivenProto(ExclusiveContext* cx, const Class* clasp, HandleObject proto,
NewObjectKind newKind = GenericObject)
{
return NewObjectWithGivenTaggedProto(cx, clasp, AsTaggedProto(proto), newKind);
}
template <typename T>
inline T*
NewObjectWithGivenProto(ExclusiveContext* cx, HandleObject proto,
NewObjectKind newKind = GenericObject)
{
return NewObjectWithGivenTaggedProto<T>(cx, AsTaggedProto(proto), newKind);
}
template <typename T>
inline T*
NewObjectWithGivenProto(ExclusiveContext* cx, HandleObject proto,
gc::AllocKind allocKind, NewObjectKind newKind = GenericObject)
{
JSObject* obj = NewObjectWithGivenTaggedProto(cx, &T::class_, AsTaggedProto(proto),
allocKind, newKind);
return obj ? &obj->as<T>() : nullptr;
}
// Make an object with the prototype set according to the cached prototype or
// Object.prototype.
JSObject*
NewObjectWithClassProtoCommon(ExclusiveContext* cx, const Class* clasp, HandleObject proto,
gc::AllocKind allocKind, NewObjectKind newKind);
inline JSObject*
NewObjectWithClassProto(ExclusiveContext* cx, const Class* clasp, HandleObject proto,
gc::AllocKind allocKind, NewObjectKind newKind = GenericObject)
{
return NewObjectWithClassProtoCommon(cx, clasp, proto, allocKind, newKind);
}
inline JSObject*
NewObjectWithClassProto(ExclusiveContext* cx, const Class* clasp, HandleObject proto,
NewObjectKind newKind = GenericObject)
{
gc::AllocKind allocKind = gc::GetGCObjectKind(clasp);
return NewObjectWithClassProto(cx, clasp, proto, allocKind, newKind);
}
template<class T>
inline T*
NewObjectWithClassProto(ExclusiveContext* cx, HandleObject proto,
NewObjectKind newKind = GenericObject)
{
JSObject* obj = NewObjectWithClassProto(cx, &T::class_, proto, newKind);
return obj ? &obj->as<T>() : nullptr;
}
template <class T>
inline T*
NewObjectWithClassProto(ExclusiveContext* cx, HandleObject proto, gc::AllocKind allocKind,
NewObjectKind newKind = GenericObject)
{
JSObject* obj = NewObjectWithClassProto(cx, &T::class_, proto, allocKind, newKind);
return obj ? &obj->as<T>() : nullptr;
}
/*
* Create a native instance of the given class with parent and proto set
* according to the context's active global.
*/
inline JSObject*
NewBuiltinClassInstance(ExclusiveContext* cx, const Class* clasp, gc::AllocKind allocKind,
NewObjectKind newKind = GenericObject)
{
return NewObjectWithClassProto(cx, clasp, nullptr, allocKind, newKind);
}
inline JSObject*
NewBuiltinClassInstance(ExclusiveContext* cx, const Class* clasp, NewObjectKind newKind = GenericObject)
{
gc::AllocKind allocKind = gc::GetGCObjectKind(clasp);
return NewBuiltinClassInstance(cx, clasp, allocKind, newKind);
}
template<typename T>
inline T*
NewBuiltinClassInstance(ExclusiveContext* cx, NewObjectKind newKind = GenericObject)
{
JSObject* obj = NewBuiltinClassInstance(cx, &T::class_, newKind);
return obj ? &obj->as<T>() : nullptr;
}
template<typename T>
inline T*
NewBuiltinClassInstance(ExclusiveContext* cx, gc::AllocKind allocKind, NewObjectKind newKind = GenericObject)
{
JSObject* obj = NewBuiltinClassInstance(cx, &T::class_, allocKind, newKind);
return obj ? &obj->as<T>() : nullptr;
}
// Used to optimize calls to (new Object())
bool
NewObjectScriptedCall(JSContext* cx, MutableHandleObject obj);
JSObject*
NewObjectWithGroupCommon(ExclusiveContext* cx, HandleObjectGroup group,
gc::AllocKind allocKind, NewObjectKind newKind);
template <typename T>
inline T*
NewObjectWithGroup(ExclusiveContext* cx, HandleObjectGroup group,
gc::AllocKind allocKind, NewObjectKind newKind = GenericObject)
{
JSObject* obj = NewObjectWithGroupCommon(cx, group, allocKind, newKind);
return obj ? &obj->as<T>() : nullptr;
}
template <typename T>
inline T*
NewObjectWithGroup(ExclusiveContext* cx, HandleObjectGroup group,
NewObjectKind newKind = GenericObject)
{
gc::AllocKind allocKind = gc::GetGCObjectKind(group->clasp());
return NewObjectWithGroup<T>(cx, group, allocKind, newKind);
}
/*
* As for gc::GetGCObjectKind, where numElements is a guess at the final size of
* the object, zero if the final size is unknown. This should only be used for
* objects that do not require any fixed slots.
*/
static inline gc::AllocKind
GuessObjectGCKind(size_t numElements)
{
if (numElements)
return gc::GetGCObjectKind(numElements);
return gc::AllocKind::OBJECT4;
}
static inline gc::AllocKind
GuessArrayGCKind(size_t numElements)
{
if (numElements)
return gc::GetGCArrayKind(numElements);
return gc::AllocKind::OBJECT8;
}
// Returns ESClass_Other if the value isn't an object, or if the object
// isn't of one of the enumerated classes. Otherwise returns the appropriate
// class.
inline bool
GetClassOfValue(JSContext* cx, HandleValue v, ESClassValue* classValue)
{
if (!v.isObject()) {
*classValue = ESClass_Other;
return true;
}
RootedObject obj(cx, &v.toObject());
return GetBuiltinClass(cx, obj, classValue);
}
extern NativeObject*
InitClass(JSContext* cx, HandleObject obj, HandleObject parent_proto,
const Class* clasp, JSNative constructor, unsigned nargs,
const JSPropertySpec* ps, const JSFunctionSpec* fs,
const JSPropertySpec* static_ps, const JSFunctionSpec* static_fs,
NativeObject** ctorp = nullptr,
gc::AllocKind ctorKind = gc::AllocKind::FUNCTION);
} /* namespace js */
#endif /* jsobjinlines_h */