Re: [PATCHv2 2/4] perf tools: Mark ksymbol dsos with kernel type

From: Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>
To: Jiri Olsa <jolsa@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>,
	Ravi Bangoria <ravi.bangoria@linux.ibm.com>,
	lkml <linux-kernel@vger.kernel.org>,
	Ingo Molnar <mingo@kernel.org>,
	Namhyung Kim <namhyung@kernel.org>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Michael Petlan <mpetlan@redhat.com>
Subject: Re: [PATCHv2 2/4] perf tools: Mark ksymbol dsos with kernel type
Date: Tue, 11 Feb 2020 10:47:13 -0300	[thread overview]
Message-ID: <20200211134713.GB32066@kernel.org> (raw)
In-Reply-To: <20200210200847.GA36715@krava>

Em Mon, Feb 10, 2020 at 09:08:47PM +0100, Jiri Olsa escreveu:
> On Mon, Feb 10, 2020 at 04:25:37PM +0100, Jiri Olsa wrote:
> > On Mon, Feb 10, 2020 at 12:17:59PM -0300, Arnaldo Carvalho de Melo wrote:
> > > Em Mon, Feb 10, 2020 at 03:32:16PM +0100, Jiri Olsa escreveu:
> > > > We add ksymbol map into machine->kmaps, so it needs to be
> > > > created as 'struct kmap', which is dependent on its dso
> > > > having kernel type.
> > > > 
> > > > Reported-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
> > > > Tested-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
> > > > Signed-off-by: Jiri Olsa <jolsa@kernel.org>
> > > > ---
> > > >  tools/perf/util/machine.c | 10 ++++++++--
> > > >  1 file changed, 8 insertions(+), 2 deletions(-)
> > > > 
> > > > diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
> > > > index e3e5490f6de5..0a43dc83d7b2 100644
> > > > --- a/tools/perf/util/machine.c
> > > > +++ b/tools/perf/util/machine.c
> > > > @@ -727,8 +727,14 @@ static int machine__process_ksymbol_register(struct machine *machine,
> > > >  	struct map *map = maps__find(&machine->kmaps, event->ksymbol.addr);
> > > >  
> > > >  	if (!map) {
> > > > -		map = dso__new_map(event->ksymbol.name);
> > > > -		if (!map)
> > > > +		struct dso *dso = dso__new(event->ksymbol.name);
> > > > +
> > > > +		if (dso) {
> > > > +			dso->kernel = DSO_TYPE_KERNEL;
> > > > +			map = map__new2(0, dso);
> > > > +		}
> > > > +
> > > > +		if (!dso || !map)
> > > 
> > > We leak dso if map creation fails?
> > 
> > yep :-\ will post v2
> 
> v2 attached, it's also all in my perf/top branch

Thanks for fixing it, will process it into my perf/urgent branch.

- Arnaldo

> thanks,
> jirka
> 
> 
> ---
> We add ksymbol map into machine->kmaps, so it needs to be
> created as 'struct kmap', which is dependent on its dso
> having kernel type.
> 
> Reported-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
> Tested-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
> Signed-off-by: Jiri Olsa <jolsa@kernel.org>
> ---
>  tools/perf/util/machine.c | 12 ++++++++++--
>  1 file changed, 10 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
> index e3e5490f6de5..0ad026561c7f 100644
> --- a/tools/perf/util/machine.c
> +++ b/tools/perf/util/machine.c
> @@ -727,9 +727,17 @@ static int machine__process_ksymbol_register(struct machine *machine,
>  	struct map *map = maps__find(&machine->kmaps, event->ksymbol.addr);
>  
>  	if (!map) {
> -		map = dso__new_map(event->ksymbol.name);
> -		if (!map)
> +		struct dso *dso = dso__new(event->ksymbol.name);
> +
> +		if (dso) {
> +			dso->kernel = DSO_TYPE_KERNEL;
> +			map = map__new2(0, dso);
> +		}
> +
> +		if (!dso || !map) {
> +			dso__put(dso);
>  			return -ENOMEM;
> +		}
>  
>  		map->start = event->ksymbol.addr;
>  		map->end = map->start + event->ksymbol.len;
> -- 
> 2.24.1
> 

-- 

- Arnaldo