Re: [PATCH v2 1/3] monitor: Add HMP and QMP interfaces

[Daniel P . Berrangé]

On Mon, Sep 13, 2021 at 02:48:37PM +0200, Paolo Bonzini wrote:
> On 13/09/21 11:35, Daniel P. Berrangé wrote:
> > >    g_autoptr(Error) err = NULL
> > I was mistaken here - Error shouldn't use g_autoptr, just
> > 
> >     Error err = NULL;
> > 
> > > > +    SGXInfo *info = qmp_query_sgx(NULL);
> > > Pass in &err not NULL;
> > > 
> > > Also  declare it with  'g_autoptr(SGXInfo) info = ...'
> > > 
> > > And then
> > > 
> > >     if (err) {
> > >        monitor_printf(mon, "%s\n", error_get_pretty(err);
> > Then use the simpler:
> > 
> >      error_report_err(err);
> 
> Indeed.
> 
> That said, more long term (but this is something Coccinelle could help with)
> perhaps error_report_err should not free the error, and instead we should
> use g_autoptr(Error) in the callers.  I don't like functions that do not
> have free in their name and yet free a pointer...

Yes, this error_report_err surprises me every 6 months when I
come to deal with it. So I think using g_autoptr would be a
nice replacement, with no additional burden in terms of lines
of code in callers too.

Regards,
Daniel
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