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

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Date:   Mon, 10 Feb 2020 12:17:59 -0300
From:   Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
To:     Jiri Olsa <jolsa@...nel.org>
Cc:     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: Re: [PATCH 2/4] perf tools: Mark ksymbol dsos with kernel type

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?


- Arnaldo

>  			return -ENOMEM;
>  
>  		map->start = event->ksymbol.addr;
> -- 
> 2.24.1
> 

-- 

- Arnaldo