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

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Message-ID: <20200210200847.GA36715@krava>
Date:   Mon, 10 Feb 2020 21:08:47 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Jiri Olsa <jolsa@...nel.org>,
        Ravi Bangoria <ravi.bangoria@...ux.ibm.com>,
        lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Michael Petlan <mpetlan@...hat.com>
Subject: [PATCHv2 2/4] perf tools: Mark ksymbol dsos with kernel type

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@...ux.ibm.com>
> > > Tested-by: Ravi Bangoria <ravi.bangoria@...ux.ibm.com>
> > > Signed-off-by: Jiri Olsa <jolsa@...nel.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,
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@...ux.ibm.com>
Tested-by: Ravi Bangoria <ravi.bangoria@...ux.ibm.com>
Signed-off-by: Jiri Olsa <jolsa@...nel.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