Re: [Qemu-devel] [PATCH 07/20] libqtest: Simplify qmp_fd_vsend() a bit

["Philippe Mathieu-Daudé" <f4bug@amsat.org>]

On 07/12/2018 08:12 AM, Markus Armbruster wrote:
> Signed-off-by: Markus Armbruster <armbru@redhat.com>

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

> ---
>  tests/libqtest.c | 18 +++++++-----------
>  1 file changed, 7 insertions(+), 11 deletions(-)
> 
> diff --git a/tests/libqtest.c b/tests/libqtest.c
> index c2c08a890c..3bfb062fcb 100644
> --- a/tests/libqtest.c
> +++ b/tests/libqtest.c
> @@ -488,24 +488,20 @@ QDict *qtest_qmp_receive(QTestState *s)
>   */
>  void qmp_fd_vsend(int fd, const char *fmt, va_list ap)
>  {
> -    va_list ap_copy;
>      QObject *qobj;
>  
> -    /* qobject_from_jsonv() silently eats leading 0xff as invalid
> -     * JSON, but we want to test sending them over the wire to force
> -     * resyncs */
> +    /*
> +     * qobject_from_vjsonf_nofail() chokes on leading 0xff as invalid
> +     * JSON, but tests/test-qga.c needs to send that to test QGA
> +     * synchronization
> +     */
>      if (*fmt == '\377') {
>          socket_send(fd, fmt, 1);
>          fmt++;
>      }
>  
> -    /* Going through qobject ensures we escape strings properly.
> -     * This seemingly unnecessary copy is required in case va_list
> -     * is an array type.
> -     */
> -    va_copy(ap_copy, ap);
> -    qobj = qobject_from_jsonv(fmt, &ap_copy, &error_abort);
> -    va_end(ap_copy);
> +    /* Going through qobject ensures we escape strings properly */
> +    qobj = qobject_from_vjsonf_nofail(fmt, ap);
>  
>      /* No need to send anything for an empty QObject.  */
>      if (qobj) {
>