/**
* Get the interface name and member name (for error messages).
*
* We could instead have each quick stub pass its name to the error-handling
* functions, as that name is statically known. But that would be redundant;
* the information is handy at runtime anyway. Also, this code often produces
* a more specific error message, e.g. "[nsIDOMHTMLDocument.appendChild]"
* rather than "[nsIDOMNode.appendChild]".
*/
static void
GetMemberInfo(JSObject *obj, jsid memberId, const char **ifaceName)
{
*ifaceName = "Unknown";
// Don't try to generate a useful name if there are security wrappers,
// because it isn't worth the risk of something going wrong just to generate
// an error message. Instead, only handle the simple case where we have the
// reflector in hand.
if (IS_WRAPPER_CLASS(js::GetObjectClass(obj))) {
XPCWrappedNativeProto *proto;
if (IS_SLIM_WRAPPER_OBJECT(obj)) {
proto = GetSlimWrapperProto(obj);
} else {
MOZ_ASSERT(IS_WN_WRAPPER_OBJECT(obj));
XPCWrappedNative *wrapper =
static_cast<XPCWrappedNative *>(js::GetObjectPrivate(obj));
proto = wrapper->GetProto();
}
if (proto) {
XPCNativeSet *set = proto->GetSet();
if (set) {
XPCNativeMember *member;
XPCNativeInterface *iface;
if (set->FindMember(memberId, &member, &iface))
*ifaceName = iface->GetNameString();
}
}
}
}
/**
* Get the interface name and member name (for error messages).
*
* We could instead have each quick stub pass its name to the error-handling
* functions, as that name is statically known. But that would be redundant;
* the information is handy at runtime anyway. Also, this code often produces
* a more specific error message, e.g. "[nsIDOMHTMLDocument.appendChild]"
* rather than "[nsIDOMNode.appendChild]".
*/
static void
GetMemberInfo(JSObject *obj,
jsval memberId,
const char **ifaceName,
const char **memberName)
{
// Get the interface name. From DefinePropertyIfFound (in
// xpcwrappednativejsops.cpp) and XPCThrower::Verbosify.
//
// We could instead make the quick stub could pass in its interface name,
// but this code often produces a more specific error message, e.g.
*ifaceName = "Unknown";
NS_ASSERTION(IS_WRAPPER_CLASS(STOBJ_GET_CLASS(obj)) ||
STOBJ_GET_CLASS(obj) == &XPC_WN_Tearoff_JSClass ||
IS_SLIM_WRAPPER(obj),
"obj must be a wrapper");
XPCWrappedNativeProto *proto;
if(IS_SLIM_WRAPPER(obj))
{
proto = GetSlimWrapperProto(obj);
}
else
{
XPCWrappedNative *wrapper = (XPCWrappedNative *) obj->getPrivate();
proto = wrapper->GetProto();
}
if(proto)
{
XPCNativeSet *set = proto->GetSet();
if(set)
{
XPCNativeMember *member;
XPCNativeInterface *iface;
if(set->FindMember(memberId, &member, &iface))
*ifaceName = iface->GetNameString();
}
}
*memberName = (JSVAL_IS_STRING(memberId)
? JS_GetStringBytes(JSVAL_TO_STRING(memberId))
: "unknown");
}
/**
* Get the interface name and member name (for error messages).
*
* We could instead have each quick stub pass its name to the error-handling
* functions, as that name is statically known. But that would be redundant;
* the information is handy at runtime anyway. Also, this code often produces
* a more specific error message, e.g. "[nsIDOMHTMLDocument.appendChild]"
* rather than "[nsIDOMNode.appendChild]".
*/
static void
GetMemberInfo(JSObject *obj, jsid memberId, const char **ifaceName)
{
*ifaceName = "Unknown";
// Don't try to generate a useful name if there are security wrappers,
// because it isn't worth the risk of something going wrong just to generate
// an error message. Instead, only handle the simple case where we have the
// reflector in hand.
if (IS_WN_REFLECTOR(obj)) {
XPCWrappedNative *wrapper = XPCWrappedNative::Get(obj);
XPCWrappedNativeProto *proto = wrapper->GetProto();
if (proto) {
XPCNativeSet *set = proto->GetSet();
if (set) {
XPCNativeMember *member;
XPCNativeInterface *iface;
if (set->FindMember(memberId, &member, &iface))
*ifaceName = iface->GetNameString();
}
}
}
}
bool
XPC_WN_Shared_Enumerate(JSContext* cx, HandleObject obj)
{
XPCCallContext ccx(cx, obj);
XPCWrappedNative* wrapper = ccx.GetWrapper();
THROW_AND_RETURN_IF_BAD_WRAPPER(cx, wrapper);
// Since we aren't going to enumerate tearoff names and the prototype
// handles non-mutated members, we can do this potential short-circuit.
if (!wrapper->HasMutatedSet())
return true;
XPCNativeSet* set = wrapper->GetSet();
XPCNativeSet* protoSet = wrapper->HasProto() ?
wrapper->GetProto()->GetSet() : nullptr;
uint16_t interface_count = set->GetInterfaceCount();
XPCNativeInterface** interfaceArray = set->GetInterfaceArray();
for (uint16_t i = 0; i < interface_count; i++) {
XPCNativeInterface* iface = interfaceArray[i];
uint16_t member_count = iface->GetMemberCount();
for (uint16_t k = 0; k < member_count; k++) {
XPCNativeMember* member = iface->GetMemberAt(k);
jsid name = member->GetName();
// Skip if this member is going to come from the proto.
uint16_t index;
if (protoSet &&
protoSet->FindMember(name, nullptr, &index) && index == i)
continue;
if (!xpc_ForcePropertyResolve(cx, obj, name))
return false;
}
}
return true;
}
bool
XPC_WN_Helper_Resolve(JSContext* cx, HandleObject obj, HandleId id, bool* resolvedp)
{
nsresult rv = NS_OK;
bool retval = true;
bool resolved = false;
XPCCallContext ccx(cx, obj);
XPCWrappedNative* wrapper = ccx.GetWrapper();
THROW_AND_RETURN_IF_BAD_WRAPPER(cx, wrapper);
RootedId old(cx, ccx.SetResolveName(id));
XPCNativeScriptableInfo* si = wrapper->GetScriptableInfo();
if (si && si->GetFlags().WantResolve()) {
XPCWrappedNative* oldResolvingWrapper;
bool allowPropMods = si->GetFlags().AllowPropModsDuringResolve();
if (allowPropMods)
oldResolvingWrapper = ccx.SetResolvingWrapper(wrapper);
rv = si->GetCallback()->Resolve(wrapper, cx, obj, id, &resolved, &retval);
if (allowPropMods)
(void)ccx.SetResolvingWrapper(oldResolvingWrapper);
}
old = ccx.SetResolveName(old);
MOZ_ASSERT(old == id, "bad nest");
if (NS_FAILED(rv)) {
return Throw(rv, cx);
}
if (resolved) {
*resolvedp = true;
} else if (wrapper->HasMutatedSet()) {
// We are here if scriptable did not resolve this property and
// it *might* be in the instance set but not the proto set.
XPCNativeSet* set = wrapper->GetSet();
XPCNativeSet* protoSet = wrapper->HasProto() ?
wrapper->GetProto()->GetSet() : nullptr;
XPCNativeMember* member = nullptr;
RefPtr<XPCNativeInterface> iface;
bool IsLocal = false;
if (set->FindMember(id, &member, &iface, protoSet, &IsLocal) &&
IsLocal) {
XPCWrappedNative* oldResolvingWrapper;
XPCNativeScriptableFlags siFlags(0);
if (si)
siFlags = si->GetFlags();
XPCWrappedNative* wrapperForInterfaceNames =
siFlags.DontReflectInterfaceNames() ? nullptr : wrapper;
oldResolvingWrapper = ccx.SetResolvingWrapper(wrapper);
retval = DefinePropertyIfFound(ccx, obj, id,
set, iface, member,
wrapper->GetScope(),
false,
wrapperForInterfaceNames,
nullptr, si,
JSPROP_ENUMERATE, resolvedp);
(void)ccx.SetResolvingWrapper(oldResolvingWrapper);
}
}
return retval;
}
