Re: [PATCH v4 3/3] hw/misc/mos6522: move timer_new from init() into realize() to avoid memleaks

[David Gibson <david@gibson.dropbear.id.au>]

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On Fri, Mar 06, 2020 at 09:56:52AM +1100, David Gibson wrote:
> On Thu, Mar 05, 2020 at 02:54:22PM +0800, Pan Nengyuan wrote:
> > There are some memleaks when we call 'device_list_properties'. This patch move timer_new from init into realize to fix it.
> > 
> > Reported-by: Euler Robot <euler.robot@huawei.com>
> > Signed-off-by: Pan Nengyuan <pannengyuan@huawei.com>
> 
> Applied to ppc-for-5.0.
> 
> Probably the memory region stuff should be in realize() rather than
> init() as well, but that can be fixed later.

....and removed again.  This causes SEGVs during make
check-qtest-ppc64.

> 
> > ---
> > Cc: Laurent Vivier <laurent@vivier.eu>
> > Cc: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
> > Cc: David Gibson <david@gibson.dropbear.id.au>
> > Cc: qemu-ppc@nongnu.org
> > ---
> > v2->v1:
> > - no changes in this patch.
> > v3->v2:
> > - remove null check in reset, and add calls to mos6522_realize() in mac_via_realize to make this move to be valid.
> > v4->v3:
> > - split patch into two, this patch fix the memleaks.
> > ---
> >  hw/misc/mos6522.c | 6 ++++++
> >  1 file changed, 6 insertions(+)
> > 
> > diff --git a/hw/misc/mos6522.c b/hw/misc/mos6522.c
> > index 19e154b870..c1cd154a84 100644
> > --- a/hw/misc/mos6522.c
> > +++ b/hw/misc/mos6522.c
> > @@ -485,6 +485,11 @@ static void mos6522_init(Object *obj)
> >      for (i = 0; i < ARRAY_SIZE(s->timers); i++) {
> >          s->timers[i].index = i;
> >      }
> > +}
> > +
> > +static void mos6522_realize(DeviceState *dev, Error **errp)
> > +{
> > +    MOS6522State *s = MOS6522(dev);
> >  
> >      s->timers[0].timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, mos6522_timer1, s);
> >      s->timers[1].timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, mos6522_timer2, s);
> > @@ -502,6 +507,7 @@ static void mos6522_class_init(ObjectClass *oc, void *data)
> >  
> >      dc->reset = mos6522_reset;
> >      dc->vmsd = &vmstate_mos6522;
> > +    dc->realize = mos6522_realize;
> >      device_class_set_props(dc, mos6522_properties);
> >      mdc->parent_reset = dc->reset;
> >      mdc->set_sr_int = mos6522_set_sr_int;
> 



-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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