bool
CreateThis(JSContext *cx, HandleObject callee, MutableHandleValue rval)
{
rval.set(MagicValue(JS_IS_CONSTRUCTING));
if (callee->isFunction()) {
JSFunction *fun = callee->toFunction();
if (fun->isInterpreted()) {
JSScript *script = fun->getOrCreateScript(cx);
if (!script || !script->ensureHasTypes(cx))
return false;
JSObject *thisObj = CreateThisForFunction(cx, callee, false);
if (!thisObj)
return false;
rval.set(ObjectValue(*thisObj));
}
}
return true;
}
JS_SplicePrototype(JSContext* cx, HandleObject obj, HandleObject proto)
{
/*
* Change the prototype of an object which hasn't been used anywhere
* and does not share its type with another object. Unlike JS_SetPrototype,
* does not nuke type information for the object.
*/
CHECK_REQUEST(cx);
if (!obj->isSingleton()) {
/*
* We can see non-singleton objects when trying to splice prototypes
* due to mutable __proto__ (ugh).
*/
return JS_SetPrototype(cx, obj, proto);
}
Rooted<TaggedProto> tagged(cx, TaggedProto(proto));
return obj->splicePrototype(cx, obj->getClass(), tagged);
}
bool
jit::SetPropertyPar(ForkJoinSlice *slice, HandleObject obj, HandlePropertyName name,
HandleValue value, bool strict, jsbytecode *pc)
{
JS_ASSERT(slice->isThreadLocal(obj));
if (*pc == JSOP_SETALIASEDVAR) {
// See comment in jit::SetProperty.
Shape *shape = obj->nativeLookupPure(name);
JS_ASSERT(shape && shape->hasSlot());
return obj->nativeSetSlotIfHasType(shape, value);
}
// Fail early on hooks.
if (obj->getOps()->setProperty)
return TP_RETRY_SEQUENTIALLY;
RootedValue v(slice, value);
RootedId id(slice, NameToId(name));
return baseops::SetPropertyHelper<ParallelExecution>(slice, obj, obj, id, 0, &v, strict);
}
static RawObject
CloneDenseArray(JSContext *cx, HandleObject obj, CloneMemory &clonedObjects)
{
uint32_t len = obj->getArrayLength();
RootedObject clone(cx, NewDenseAllocatedArray(cx, len));
clone->setDenseArrayInitializedLength(len);
for (uint32_t i = 0; i < len; i++)
JSObject::initDenseArrayElementWithType(cx, clone, i, UndefinedValue());
RootedValue elt(cx);
for (uint32_t i = 0; i < len; i++) {
bool present;
if (!obj->getElementIfPresent(cx, obj, obj, i, &elt, &present))
return NULL;
if (present) {
if (!CloneValue(cx, &elt, clonedObjects))
return NULL;
JSObject::setDenseArrayElementWithType(cx, clone, i, elt);
}
}
return clone;
}
static JSBool
fun_enumerate(JSContext *cx, HandleObject obj)
{
JS_ASSERT(obj->isFunction());
RootedId id(cx);
bool found;
if (!obj->isBoundFunction()) {
id = NameToId(cx->runtime->atomState.classPrototypeAtom);
if (!obj->hasProperty(cx, id, &found, JSRESOLVE_QUALIFIED))
return false;
}
id = NameToId(cx->runtime->atomState.lengthAtom);
if (!obj->hasProperty(cx, id, &found, JSRESOLVE_QUALIFIED))
return false;
id = NameToId(cx->runtime->atomState.nameAtom);
if (!obj->hasProperty(cx, id, &found, JSRESOLVE_QUALIFIED))
return false;
for (unsigned i = 0; i < ArrayLength(poisonPillProps); i++) {
const uint16_t offset = poisonPillProps[i];
id = NameToId(OFFSET_TO_NAME(cx->runtime, offset));
if (!obj->hasProperty(cx, id, &found, JSRESOLVE_QUALIFIED))
return false;
}
return true;
}
static inline bool
Enumerate(JSContext* cx, HandleObject pobj, jsid id,
bool enumerable, unsigned flags, Maybe<IdSet>& ht, AutoIdVector* props)
{
if (CheckForDuplicates) {
if (!ht) {
ht.emplace(cx);
// Most of the time there are only a handful of entries.
if (!ht->init(5))
return false;
}
// If we've already seen this, we definitely won't add it.
IdSet::AddPtr p = ht->lookupForAdd(id);
if (MOZ_UNLIKELY(!!p))
return true;
// It's not necessary to add properties to the hash table at the end of
// the prototype chain, but custom enumeration behaviors might return
// duplicated properties, so always add in such cases.
if (pobj->is<ProxyObject>() ||
pobj->staticPrototype() ||
pobj->getClass()->getNewEnumerate())
{
if (!ht->add(p, id))
return false;
}
}
if (!enumerable && !(flags & JSITER_HIDDEN))
return true;
// Symbol-keyed properties and nonenumerable properties are skipped unless
// the caller specifically asks for them. A caller can also filter out
// non-symbols by asking for JSITER_SYMBOLSONLY.
if (JSID_IS_SYMBOL(id) ? !(flags & JSITER_SYMBOLS) : (flags & JSITER_SYMBOLSONLY))
return true;
return props->append(id);
}
static JSBool
ArgSetter(JSContext *cx, HandleObject obj, HandleId id, JSBool strict, Value *vp)
{
if (!obj->isNormalArguments())
return true;
NormalArgumentsObject &argsobj = obj->asNormalArguments();
if (JSID_IS_INT(id)) {
unsigned arg = unsigned(JSID_TO_INT(id));
if (arg < argsobj.initialLength()) {
if (StackFrame *fp = argsobj.maybeStackFrame()) {
JSScript *script = fp->functionScript();
JS_ASSERT(script->needsArgsObj());
if (arg < fp->numFormalArgs()) {
JS_ASSERT(fp->script()->formalIsAliased(arg));
types::TypeScript::SetArgument(cx, script, arg, *vp);
}
fp->canonicalActualArg(arg) = *vp;
return true;
}
}
} else {
JS_ASSERT(JSID_IS_ATOM(id, cx->runtime->atomState.lengthAtom) ||
JSID_IS_ATOM(id, cx->runtime->atomState.calleeAtom));
}
/*
* For simplicity we use delete/define to replace the property with one
* backed by the default Object getter and setter. Note that we rely on
* args_delProperty to clear the corresponding reserved slot so the GC can
* collect its value. Note also that we must define the property instead
* of setting it in case the user has changed the prototype to an object
* that has a setter for this id.
*/
RootedVarValue value(cx);
return baseops::DeleteGeneric(cx, obj, id, value.address(), false) &&
baseops::DefineProperty(cx, obj, id, vp, NULL, NULL, JSPROP_ENUMERATE);
}
bool
ArrayPushDense(JSContext *cx, HandleObject obj, HandleValue v, uint32_t *length)
{
JS_ASSERT(obj->isArray());
Value argv[] = { UndefinedValue(), ObjectValue(*obj), v };
AutoValueArray ava(cx, argv, 3);
if (!js::array_push(cx, 1, argv))
return false;
*length = argv[0].toInt32();
return true;
}
/* static */ void
ArgumentsObject::MaybeForwardToCallObject(jit::JitFrameLayout* frame, HandleObject callObj,
ArgumentsObject* obj, ArgumentsData* data)
{
JSFunction* callee = jit::CalleeTokenToFunction(frame->calleeToken());
JSScript* script = callee->nonLazyScript();
if (callee->needsCallObject() && script->argsObjAliasesFormals()) {
MOZ_ASSERT(callObj && callObj->is<CallObject>());
obj->initFixedSlot(MAYBE_CALL_SLOT, ObjectValue(*callObj.get()));
for (AliasedFormalIter fi(script); fi; fi++)
data->args[fi.frameIndex()] = MagicScopeSlotValue(fi.scopeSlot());
}
}
/* static */ void
ArgumentsObject::MaybeForwardToCallObject(ion::IonJSFrameLayout *frame, HandleObject callObj,
JSObject *obj, ArgumentsData *data)
{
JSFunction *callee = ion::CalleeTokenToFunction(frame->calleeToken());
JSScript *script = callee->nonLazyScript();
if (callee->isHeavyweight() && script->argsObjAliasesFormals()) {
JS_ASSERT(callObj && callObj->is<CallObject>());
obj->initFixedSlot(MAYBE_CALL_SLOT, ObjectValue(*callObj.get()));
for (AliasedFormalIter fi(script); fi; fi++)
data->args[fi.frameIndex()] = MagicValue(JS_FORWARD_TO_CALL_OBJECT);
}
}
bool
SetDenseElement(JSContext *cx, HandleObject obj, int32_t index, HandleValue value,
bool strict)
{
// This function is called from Ion code for StoreElementHole's OOL path.
// In this case we know the object is native, has no indexed properties
// and we can use setDenseElement instead of setDenseElementWithType.
MOZ_ASSERT(obj->isNative());
MOZ_ASSERT(!obj->isIndexed());
JSObject::EnsureDenseResult result = JSObject::ED_SPARSE;
do {
if (index < 0)
break;
bool isArray = obj->is<ArrayObject>();
if (isArray && !obj->as<ArrayObject>().lengthIsWritable())
break;
uint32_t idx = uint32_t(index);
result = obj->ensureDenseElements(cx, idx, 1);
if (result != JSObject::ED_OK)
break;
if (isArray) {
ArrayObject &arr = obj->as<ArrayObject>();
if (idx >= arr.length())
arr.setLengthInt32(idx + 1);
}
obj->setDenseElement(idx, value);
return true;
} while (false);
if (result == JSObject::ED_FAILED)
return false;
MOZ_ASSERT(result == JSObject::ED_SPARSE);
RootedValue indexVal(cx, Int32Value(index));
return SetObjectElement(cx, obj, indexVal, value, strict);
}
bool
GetPropIRGenerator::tryAttachDOMProxyShadowed(HandleObject obj, ObjOperandId objId)
{
MOZ_ASSERT(IsCacheableDOMProxy(obj));
writer.guardShape(objId, obj->maybeShape());
// No need for more guards: we know this is a DOM proxy, since the shape
// guard enforces a given JSClass, so just go ahead and emit the call to
// ProxyGet.
writer.callProxyGetResult(objId, NameToId(name_));
writer.typeMonitorResult();
return true;
}
static JSBool
StrictArgGetter(JSContext *cx, HandleObject obj, HandleId id, MutableHandleValue vp)
{
if (!obj->isStrictArguments())
return true;
StrictArgumentsObject &argsobj = obj->asStrictArguments();
if (JSID_IS_INT(id)) {
/*
* arg can exceed the number of arguments if a script changed the
* prototype to point to another Arguments object with a bigger argc.
*/
unsigned arg = unsigned(JSID_TO_INT(id));
if (arg < argsobj.initialLength() && !argsobj.isElementDeleted(arg))
vp.set(argsobj.element(arg));
} else {
JS_ASSERT(JSID_IS_ATOM(id, cx->names().length));
if (!argsobj.hasOverriddenLength())
vp.setInt32(argsobj.initialLength());
}
return true;
}
bool
SetProperty(JSContext *cx, HandleObject obj, HandlePropertyName name, HandleValue value,
bool strict, int jsop)
{
RootedValue v(cx, value);
RootedId id(cx, NameToId(name));
if (jsop == JSOP_SETALIASEDVAR) {
// Aliased var assigns ignore readonly attributes on the property, as
// required for initializing 'const' closure variables.
Shape *shape = obj->nativeLookup(cx, name);
JS_ASSERT(shape && shape->hasSlot());
JSObject::nativeSetSlotWithType(cx, obj, shape, value);
return true;
}
if (JS_LIKELY(!obj->getOps()->setProperty)) {
unsigned defineHow = (jsop == JSOP_SETNAME || jsop == JSOP_SETGNAME) ? DNP_UNQUALIFIED : 0;
return baseops::SetPropertyHelper(cx, obj, obj, id, defineHow, &v, strict);
}
return JSObject::setGeneric(cx, obj, obj, id, &v, strict);
}
bool
SetProperty(JSContext *cx, HandleObject obj, HandlePropertyName name, HandleValue value,
bool strict, bool isSetName)
{
RootedValue v(cx, value);
RootedId id(cx, NameToId(name));
if (JS_LIKELY(!obj->getOps()->setProperty)) {
unsigned defineHow = isSetName ? DNP_UNQUALIFIED : 0;
return baseops::SetPropertyHelper(cx, obj, obj, id, defineHow, &v, strict);
}
return JSObject::setGeneric(cx, obj, obj, id, &v, strict);
}
static bool
GetUnclonedValue(JSContext *cx, HandleObject selfHostedObject, HandleId id, MutableHandleValue vp)
{
vp.setUndefined();
if (JSID_IS_INT(id)) {
size_t index = JSID_TO_INT(id);
if (index < selfHostedObject->getDenseInitializedLength() &&
!selfHostedObject->getDenseElement(index).isMagic(JS_ELEMENTS_HOLE))
{
vp.set(selfHostedObject->getDenseElement(JSID_TO_INT(id)));
return true;
}
}
// Since all atoms used by self hosting are marked as permanent, any
// attempt to look up a non-permanent atom will fail. We should only
// see such atoms when code is looking for properties on the self
// hosted global which aren't present.
if (JSID_IS_STRING(id) && !JSID_TO_STRING(id)->isPermanentAtom()) {
JS_ASSERT(selfHostedObject->is<GlobalObject>());
RootedValue value(cx, IdToValue(id));
return js_ReportValueErrorFlags(cx, JSREPORT_ERROR, JSMSG_NO_SUCH_SELF_HOSTED_PROP,
JSDVG_IGNORE_STACK, value, NullPtr(), nullptr, nullptr);
}
RootedShape shape(cx, selfHostedObject->nativeLookupPure(id));
if (!shape) {
RootedValue value(cx, IdToValue(id));
return js_ReportValueErrorFlags(cx, JSREPORT_ERROR, JSMSG_NO_SUCH_SELF_HOSTED_PROP,
JSDVG_IGNORE_STACK, value, NullPtr(), nullptr, nullptr);
}
JS_ASSERT(shape->hasSlot() && shape->hasDefaultGetter());
vp.set(selfHostedObject->getSlot(shape->slot()));
return true;
}
static MOZ_ALWAYS_INLINE bool
SetWeakMapEntryInternal(JSContext* cx, Handle<WeakMapObject*> mapObj,
HandleObject key, HandleValue value)
{
ObjectValueMap* map = mapObj->getMap();
if (!map) {
AutoInitGCManagedObject<ObjectValueMap> newMap(
cx->make_unique<ObjectValueMap>(cx, mapObj.get()));
if (!newMap)
return false;
if (!newMap->init()) {
JS_ReportOutOfMemory(cx);
return false;
}
map = newMap.release();
mapObj->setPrivate(map);
}
// Preserve wrapped native keys to prevent wrapper optimization.
if (!TryPreserveReflector(cx, key))
return false;
if (JSWeakmapKeyDelegateOp op = key->getClass()->ext.weakmapKeyDelegateOp) {
RootedObject delegate(cx, op(key));
if (delegate && !TryPreserveReflector(cx, delegate))
return false;
}
MOZ_ASSERT(key->compartment() == mapObj->compartment());
MOZ_ASSERT_IF(value.isObject(), value.toObject().compartment() == mapObj->compartment());
if (!map->put(key, value)) {
JS_ReportOutOfMemory(cx);
return false;
}
WeakMapPostWriteBarrier(cx->runtime(), map, key.get());
return true;
}
/* static */ bool
GlobalObject::warnOnceAbout(JSContext *cx, HandleObject obj, uint32_t slot, unsigned errorNumber)
{
Rooted<GlobalObject*> global(cx, &obj->global());
HeapSlot &v = global->getSlotRef(slot);
if (v.isUndefined()) {
if (!JS_ReportErrorFlagsAndNumber(cx, JSREPORT_WARNING, js_GetErrorMessage, nullptr,
errorNumber))
{
return false;
}
v.init(global, HeapSlot::Slot, slot, BooleanValue(true));
}
return true;
}
/* static */ void
ArgumentsObject::MaybeForwardToCallObject(jit::JitFrameLayout* frame, HandleObject callObj,
ArgumentsObject* obj, ArgumentsData* data)
{
JSFunction* callee = jit::CalleeTokenToFunction(frame->calleeToken());
JSScript* script = callee->nonLazyScript();
if (callee->needsCallObject() && script->argumentsAliasesFormals()) {
MOZ_ASSERT(callObj && callObj->is<CallObject>());
obj->initFixedSlot(MAYBE_CALL_SLOT, ObjectValue(*callObj.get()));
for (PositionalFormalParameterIter fi(script); fi; fi++) {
if (fi.closedOver())
data->args[fi.argumentSlot()] = MagicEnvSlotValue(fi.location().slot());
}
}
}
static JSBool
args_delProperty(JSContext *cx, HandleObject obj, HandleId id, MutableHandleValue vp)
{
ArgumentsObject &argsobj = obj->asArguments();
if (JSID_IS_INT(id)) {
unsigned arg = unsigned(JSID_TO_INT(id));
if (arg < argsobj.initialLength() && !argsobj.isElementDeleted(arg))
argsobj.markElementDeleted(arg);
} else if (JSID_IS_ATOM(id, cx->names().length)) {
argsobj.markLengthOverridden();
} else if (JSID_IS_ATOM(id, cx->names().callee)) {
argsobj.asNormalArguments().clearCallee();
}
return true;
}
static bool
WrapForSameCompartment(JSContext *cx, HandleObject obj, MutableHandleValue vp)
{
JS_ASSERT(cx->compartment == obj->compartment());
if (!cx->runtime->sameCompartmentWrapObjectCallback) {
vp.setObject(*obj);
return true;
}
JSObject *wrapped = cx->runtime->sameCompartmentWrapObjectCallback(cx, obj);
if (!wrapped)
return false;
vp.setObject(*wrapped);
return true;
}
/* static */ bool
GlobalObject::warnOnceAboutWatch(JSContext *cx, HandleObject obj)
{
Rooted<GlobalObject*> global(cx, &obj->global());
HeapSlot &v = global->getSlotRef(WARNED_WATCH_DEPRECATED);
if (v.isUndefined()) {
// Warn only once per global object.
if (!JS_ReportErrorFlagsAndNumber(cx, JSREPORT_WARNING, js_GetErrorMessage, nullptr,
JSMSG_OBJECT_WATCH_DEPRECATED))
{
return false;
}
v.init(global, HeapSlot::Slot, WARNED_WATCH_DEPRECATED, BooleanValue(true));
}
return true;
}
static JSBool
args_delProperty(JSContext *cx, HandleObject obj, HandleId id, Value *vp)
{
ArgumentsObject &argsobj = obj->asArguments();
if (JSID_IS_INT(id)) {
unsigned arg = unsigned(JSID_TO_INT(id));
if (arg < argsobj.initialLength() && !argsobj.isElementDeleted(arg)) {
argsobj.setElement(arg, UndefinedValue());
argsobj.markElementDeleted(arg);
}
} else if (JSID_IS_ATOM(id, cx->runtime->atomState.lengthAtom)) {
argsobj.markLengthOverridden();
} else if (JSID_IS_ATOM(id, cx->runtime->atomState.calleeAtom)) {
argsobj.asNormalArguments().clearCallee();
}
return true;
}
bool
WatchpointMap::watch(JSContext *cx, HandleObject obj, HandleId id,
JSWatchPointHandler handler, HandleObject closure)
{
JS_ASSERT(JSID_IS_STRING(id) || JSID_IS_INT(id));
if (!obj->setWatched(cx))
return false;
Watchpoint w;
w.handler = handler;
w.closure = closure;
w.held = false;
if (!map.put(WatchKey(obj, id), w)) {
js_ReportOutOfMemory(cx);
return false;
}
return true;
}
bool
GetPropIRGenerator::tryAttachDenseElement(HandleObject obj, ObjOperandId objId,
ValOperandId indexId)
{
MOZ_ASSERT(idVal_.isInt32());
if (!obj->isNative())
return false;
if (!obj->as<NativeObject>().containsDenseElement(uint32_t(idVal_.toInt32())))
return false;
writer.guardShape(objId, obj->as<NativeObject>().lastProperty());
Int32OperandId int32IndexId = writer.guardIsInt32(indexId);
writer.loadDenseElementResult(objId, int32IndexId);
writer.typeMonitorResult();
return true;
}
bool
GetPropIRGenerator::tryAttachWindowProxy(HandleObject obj, ObjOperandId objId, HandleId id)
{
// Attach a stub when the receiver is a WindowProxy and we are calling some
// kinds of JSNative getters on the Window object (the global object).
if (!IsWindowProxy(obj))
return false;
// This must be a WindowProxy for the current Window/global. Else it would
// be a cross-compartment wrapper and IsWindowProxy returns false for
// those.
MOZ_ASSERT(obj->getClass() == cx_->maybeWindowProxyClass());
MOZ_ASSERT(ToWindowIfWindowProxy(obj) == cx_->global());
// Now try to do the lookup on the Window (the current global) and see if
// it's a native getter.
HandleObject windowObj = cx_->global();
RootedShape shape(cx_);
RootedNativeObject holder(cx_);
NativeGetPropCacheability type = CanAttachNativeGetProp(cx_, windowObj, id, &holder, &shape, pc_,
engine_, isTemporarilyUnoptimizable_);
if (type != CanAttachCallGetter ||
!IsCacheableGetPropCallNative(windowObj, holder, shape))
{
return false;
}
// Make sure the native getter is okay with the IC passing the Window
// instead of the WindowProxy as |this| value.
JSFunction* callee = &shape->getterObject()->as<JSFunction>();
MOZ_ASSERT(callee->isNative());
if (!callee->jitInfo() || callee->jitInfo()->needsOuterizedThisObject())
return false;
// Guard the incoming object is a WindowProxy and inline a getter call based
// on the Window object.
maybeEmitIdGuard(id);
writer.guardClass(objId, GuardClassKind::WindowProxy);
ObjOperandId windowObjId = writer.loadObject(windowObj);
EmitCallGetterResult(writer, windowObj, holder, shape, windowObjId);
return true;
}
bool
ArrayShiftDense(JSContext *cx, HandleObject obj, MutableHandleValue rval)
{
JS_ASSERT(obj->isArray());
AutoDetectInvalidation adi(cx, rval.address());
Value argv[] = { UndefinedValue(), ObjectValue(*obj) };
AutoValueArray ava(cx, argv, 2);
if (!js::array_shift(cx, 0, argv))
return false;
// If the result is |undefined|, the array was probably empty and we
// have to monitor the return value.
rval.set(argv[0]);
if (rval.isUndefined())
types::TypeScript::Monitor(cx, rval);
return true;
}
static bool
FindErrorInstanceOrPrototype(JSContext* cx, HandleObject obj, MutableHandleObject result)
{
// Walk up the prototype chain until we find an error object instance or
// prototype object. This allows code like:
// Object.create(Error.prototype).stack
// or
// function NYI() { }
// NYI.prototype = new Error;
// (new NYI).stack
// to continue returning stacks that are useless, but at least don't throw.
RootedObject target(cx, CheckedUnwrap(obj));
if (!target) {
ReportAccessDenied(cx);
return false;
}
RootedObject proto(cx);
while (!IsErrorProtoKey(StandardProtoKeyOrNull(target))) {
if (!GetPrototype(cx, target, &proto))
return false;
if (!proto) {
// We walked the whole prototype chain and did not find an Error
// object.
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_INCOMPATIBLE_PROTO,
js_Error_str, "(get stack)", obj->getClass()->name);
return false;
}
target = CheckedUnwrap(proto);
if (!target) {
ReportAccessDenied(cx);
return false;
}
}
result.set(target);
return true;
}
bool
WatchpointMap::watch(JSContext* cx, HandleObject obj, HandleId id,
JSWatchPointHandler handler, HandleObject closure)
{
MOZ_ASSERT(JSID_IS_STRING(id) || JSID_IS_INT(id) || JSID_IS_SYMBOL(id));
if (!obj->setWatched(cx))
return false;
Watchpoint w(handler, closure, false);
if (!map.put(WatchKey(obj, id), w)) {
ReportOutOfMemory(cx);
return false;
}
/*
* For generational GC, we don't need to post-barrier writes to the
* hashtable here because we mark all watchpoints as part of root marking in
* markAll().
*/
return true;
}
/* static */ bool
GlobalObject::warnOnceAbout(JSContext* cx, HandleObject obj, WarnOnceFlag flag,
unsigned errorNumber)
{
Rooted<GlobalObject*> global(cx, &obj->global());
HeapSlot& v = global->getSlotRef(WARNED_ONCE_FLAGS);
MOZ_ASSERT_IF(!v.isUndefined(), v.toInt32());
int32_t flags = v.isUndefined() ? 0 : v.toInt32();
if (!(flags & flag)) {
if (!JS_ReportErrorFlagsAndNumber(cx, JSREPORT_WARNING, GetErrorMessage, nullptr,
errorNumber))
{
return false;
}
if (v.isUndefined())
v.init(global, HeapSlot::Slot, WARNED_ONCE_FLAGS, Int32Value(flags | flag));
else
v.set(global, HeapSlot::Slot, WARNED_ONCE_FLAGS, Int32Value(flags | flag));
}
return true;
}