Re: [Qemu-devel] [PATCH 3/3] hw/machine: Free old values of string properties

[Marcel Apfelbaum <marcel.a@redhat.com>]

On Mon, 2014-06-02 at 13:51 +0200, Markus Armbruster wrote:
> Marcel Apfelbaum <marcel.a@redhat.com> writes:
> 
> > On Fri, 2014-05-30 at 17:02 -0300, Eduardo Habkost wrote:
> >> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
> >> ---
> >> Cc: Marcel Apfelbaum <marcel.a@redhat.com>
> >> Cc: Andreas Färber <afaerber@suse.de>
> >> ---
> >>  hw/core/machine.c | 8 ++++++++
> >>  1 file changed, 8 insertions(+)
> >> 
> >> diff --git a/hw/core/machine.c b/hw/core/machine.c
> >> index cbba679..df612bb 100644
> >> --- a/hw/core/machine.c
> >> +++ b/hw/core/machine.c
> >> @@ -24,6 +24,7 @@ static void machine_set_accel(Object *obj, const char *value, Error **errp)
> >>  {
> >>      MachineState *ms = MACHINE(obj);
> >>  
> >> +    g_free(ms->accel);
> > I am not sure if in QMP is not caller's responsibility to free the input string.
> > If I think about it, I ask an object to set "my" string and it deletes it :(...
> > Same for the others.
> >
> > Added Markus and Luiz, maybe they have an opinion on that.
> >
> >>      ms->accel = g_strdup(value);
> >>  }
> >>  
> 
> Misunderstanding?  Eduardo's patch frees the old value before it
> overwrites it.  It doesn't free "the input string", assuming by "the
> input string" you mean argument value.

You are right! My bad, for some reason I saw g_free(value), but it
was me not reading it right :(.

Thanks,
Marcel