On Thu, May 08, 2014 at 04:21:16PM +0200, Andreas Färber wrote:
> Reimplement it based on qmp_qom_get() to avoid converting QObjects back
> to strings.
>
> Inspired-by: Paolo Bonzini <pbonz...@redhat.com>
> Signed-off-by: Andreas Färber <afaer...@suse.de>
> ---
> hmp-commands.hx | 13 +++++++++++++
> hmp.c | 22 ++++++++++++++++++++++
> hmp.h | 1 +
> 3 files changed, 36 insertions(+)
>
> diff --git a/hmp-commands.hx b/hmp-commands.hx
> index a0166af..c0603e9 100644
> --- a/hmp-commands.hx
> +++ b/hmp-commands.hx
> @@ -1691,6 +1691,19 @@ Print QOM properties of object at location @var{path}
> ETEXI
>
> {
> + .name = "qom-get",
> + .args_type = "path:s,property:s",
> + .params = "path property",
> + .help = "print QOM property",
> + .mhandler.cmd = hmp_qom_get,
> + },
> +
> +STEXI
> +@item qom-get @var{path} @var{property}
> +Print QOM property @var{property} of object at location @var{path}
> +ETEXI
> +
> + {
> .name = "info",
> .args_type = "item:s?",
> .params = "[subcommand]",
> diff --git a/hmp.c b/hmp.c
> index 1c29c8a..d7d7a98 100644
> --- a/hmp.c
> +++ b/hmp.c
> @@ -1693,3 +1693,25 @@ void hmp_qom_list(Monitor *mon, const QDict *qdict)
> }
> hmp_handle_error(mon, &err);
> }
> +
> +void hmp_qom_get(Monitor *mon, const QDict *qdict)
> +{
> + const char *path = qdict_get_str(qdict, "path");
> + const char *property = qdict_get_str(qdict, "property");
> + Error *err = NULL;
> + Object *obj;
> + char *value;
> +
> + obj = object_resolve_path(path, NULL);
> + if (obj == NULL) {
> + error_set(&err, QERR_DEVICE_NOT_FOUND, path);
> + hmp_handle_error(mon, &err);
> + return;
> + }
> + value = object_property_print(obj, property, true, &err);
> + if (err == NULL) {
> + monitor_printf(mon, "%s\n", value);
> + g_free(value);
> + }
> + hmp_handle_error(mon, &err);
> +}
> diff --git a/hmp.h b/hmp.h
> index 7ab969e..269d99e 100644
> --- a/hmp.h
> +++ b/hmp.h
> @@ -94,6 +94,7 @@ void hmp_cpu_add(Monitor *mon, const QDict *qdict);
> void hmp_object_add(Monitor *mon, const QDict *qdict);
> void hmp_object_del(Monitor *mon, const QDict *qdict);
> void hmp_qom_list(Monitor *mon, const QDict *qdict);
> +void hmp_qom_get(Monitor *mon, const QDict *qdict);
> void object_add_completion(ReadLineState *rs, int nb_args, const char *str);
> void object_del_completion(ReadLineState *rs, int nb_args, const char *str);
> void device_add_completion(ReadLineState *rs, int nb_args, const char *str);
This segfaults:
(qemu) qom-get /machine/unattached/device[9] date
Segmentation fault (core dumped)
And so does
(qemu) qom-get /machine/unattached/device[0] filtered-features
Segmentation fault (core dumped)
See: https://lists.gnu.org/archive/html/qemu-devel/2014-05/msg01975.html
