[PATCH v2] qemu_monitor_json.c: use g_autofree

[Peter Krempa]

On Mon, Oct 19, 2020 at 09:17:44 +0800, Yi Li wrote:
> Eliminate cleanup code by using g_autofree in qemuMonitorJSONCheckErrorFull()
> and qemuMonitorJSONCheckReply
> 
> Signed-off-by: Yi Li <yili at winhong.com>
> ---
>  src/qemu/qemu_monitor_json.c | 13 +++++--------
>  1 file changed, 5 insertions(+), 8 deletions(-)
> 
> diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
> index 26ac499fc5..f76b369191 100644
> --- a/src/qemu/qemu_monitor_json.c
> +++ b/src/qemu/qemu_monitor_json.c
> @@ -392,10 +392,11 @@ qemuMonitorJSONCheckErrorFull(virJSONValuePtr cmd,
>                                virJSONValuePtr reply,
>                                bool report)
>  {
> +    g_autofree char *cmdstr = virJSONValueToString(cmd, false);
> +    g_autofree char *replystr = virJSONValueToString(reply, false);
> +
>      if (virJSONValueObjectHasKey(reply, "error")) {
>          virJSONValuePtr error = virJSONValueObjectGet(reply, "error");
> -        g_autofree char *cmdstr = virJSONValueToString(cmd, false);
> -        g_autofree char *replystr = virJSONValueToString(reply, false);
>  
>          /* Log the full JSON formatted command & error */
>          VIR_DEBUG("unable to execute QEMU command %s: %s",
> @@ -417,8 +418,6 @@ qemuMonitorJSONCheckErrorFull(virJSONValuePtr cmd,
>  
>          return -1;
>      } else if (!virJSONValueObjectHasKey(reply, "return")) {
> -        g_autofree char *cmdstr = virJSONValueToString(cmd, false);
> -        g_autofree char *replystr = virJSONValueToString(reply, false);
>  
>          VIR_DEBUG("Neither 'return' nor 'error' is set in the JSON reply %s: %s",
>                    NULLSTR(cmdstr), NULLSTR(replystr));

These two hunks don't make sense in context of the patch, both use
autofree. The patch only changes scope/duplication of the variables.

If you want to do this change it should be separate with separate
justification.

> @@ -455,8 +454,8 @@ qemuMonitorJSONCheckReply(virJSONValuePtr cmd,
>  
>      data = virJSONValueObjectGet(reply, "return");
>      if (virJSONValueGetType(data) != type) {
> -        char *cmdstr = virJSONValueToString(cmd, false);
> -        char *retstr = virJSONValueToString(data, false);
> +        g_autofree char *cmdstr = virJSONValueToString(cmd, false);
> +        g_autofree char *retstr = virJSONValueToString(data, false);
>  
>          VIR_DEBUG("Unexpected return type %d (expecting %d) for command %s: %s",
>                    virJSONValueGetType(data), type, cmdstr, retstr);
> @@ -464,8 +463,6 @@ qemuMonitorJSONCheckReply(virJSONValuePtr cmd,
>                         _("unexpected type returned by QEMU command '%s'"),
>                         qemuMonitorJSONCommandName(cmd));
>  
> -        VIR_FREE(cmdstr);
> -        VIR_FREE(retstr);
>          return -1;
>      }

These hunks are okay.