Re: [Qemu-devel] [PATCH v2] qom: Reject attempts to add a property that already exists

[Peter Maydell <peter.maydell@linaro.org>]

Ping!

-- PMM

On 7 September 2012 14:55, Peter Maydell <peter.maydell@linaro.org> wrote:
> Reject attempts to add a property to an object if one of
> that name already exists. This is always a bug in the caller;
> this is merely diagnosing it gracefully rather than behaving
> oddly later.
>
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
> ---
> Changes v1->v2:
>  * use abort() rather than assert(0), as suggested by Paolo
>  * make the diagnostic message a little more helpful by
>    including the type name, and adding '' around names
>  * the patches fixing bugs which this patch makes fatal errors
>    have both now been committed to master, so there's no
>    barrier to committing it now
>
>  qom/object.c |   13 ++++++++++++-
>  1 file changed, 12 insertions(+), 1 deletion(-)
>
> diff --git a/qom/object.c b/qom/object.c
> index e3e9242..3da4c0e 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) {
> +            /* This is always a bug in the caller */
> +            fprintf(stderr, "attempt to add duplicate property '%s'"
> +                    " to object (type '%s')\n", name, object_get_typename(obj));
> +            abort();
> +        }
> +    }
> +
> +    prop = g_malloc0(sizeof(*prop));
>
>      prop->name = g_strdup(name);
>      prop->type = g_strdup(type);
> --
> 1.7.9.5
>
>