Re: [Qemu-devel] [PATCH V11 13/17] block: dump to buffer for bdrv_snapshot_dump() and bdrv_image_info_dump()

[Markus Armbruster <armbru@redhat.com>]

Stefan Hajnoczi <stefanha@gmail.com> writes:

> On Tue, Apr 02, 2013 at 07:47:26PM +0800, Wenchao Xia wrote:
>> diff --git a/qemu-img.c b/qemu-img.c
>> index 5b229a9..032f68c 100644
>> --- a/qemu-img.c
>> +++ b/qemu-img.c
>> @@ -1558,18 +1558,24 @@ static void dump_snapshots(BlockDriverState *bs)
>>  {
>>      QEMUSnapshotInfo *sn_tab, *sn;
>>      int nb_sns, i;
>> -    char buf[256];
>> +    GString *buf = g_string_new(NULL);
>>  
>>      nb_sns = bdrv_snapshot_list(bs, &sn_tab);
>>      if (nb_sns <= 0)
>>          return;
>
> Leaks buf.

Trivially avoided my moving the initialization behind the return.

>> diff --git a/savevm.c b/savevm.c
>> index e4e0008..ce0bbe1 100644
>> --- a/savevm.c
>> +++ b/savevm.c
>> @@ -2466,7 +2466,7 @@ void do_info_snapshots(Monitor *mon, const QDict *qdict)
>>      int nb_sns, i, ret, available;
>>      int total;
>>      int *available_snapshots;
>> -    char buf[256];
>> +    GString *buf = NULL;
>>  
>>      bs = bdrv_snapshots();
>>      if (!bs) {
>> @@ -2509,11 +2509,16 @@ void do_info_snapshots(Monitor *mon, const
>> QDict *qdict)
>>      }
>>  
>>      if (total > 0) {
>
> Please declare buf here since it is only used in this scope.

Matter of taste.  I'd keep it where it is :)