Re: [Qemu-devel] [PATCH v4 1/2] qom: Detect attempts to add a property that already exists

[Anthony Liguori <aliguori@us.ibm.com>]

Peter Maydell <peter.maydell@linaro.org> writes:

> Detect attempts to add a property to an object if one of
> that name already exists, and report them as critical
> errors. In particular, for static properties (eg qdev
> Property arrays) this will manifest as an abort() with
> a useful error message.
>
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>

Regards,

Anthony Liguori

> ---
>  qom/object.c |   13 ++++++++++++-
>  1 file changed, 12 insertions(+), 1 deletion(-)
>
> diff --git a/qom/object.c b/qom/object.c
> index e3e9242..a9dfc8c 100644
> --- a/qom/object.c
> +++ b/qom/object.c
> @@ -620,7 +620,18 @@ void object_property_add(Object *obj, const char *name, const char *type,
>                           ObjectPropertyRelease *release,
>                           void *opaque, Error **errp)
>  {
> -    ObjectProperty *prop = g_malloc0(sizeof(*prop));
> +    ObjectProperty *prop;
> +
> +    QTAILQ_FOREACH(prop, &obj->properties, node) {
> +        if (strcmp(prop->name, name) == 0) {
> +            error_setg(errp, "attempt to add duplicate property '%s'"
> +                       " to object (type '%s')\n", name,
> +                       object_get_typename(obj));
> +            return;
> +        }
> +    }
> +
> +    prop = g_malloc0(sizeof(*prop));
>  
>      prop->name = g_strdup(name);
>      prop->type = g_strdup(type);
> -- 
> 1.7.9.5