linux-kernel - Re: [PATCH 1/2] perf symbol: Set binary

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Message-ID: <b9a82437-cd4a-5331-47da-b0d1640169d7@ispras.ru>
Date: Fri, 20 Sep 2024 20:04:00 +0300 (MSK)
From: Alexander Monakov <amonakov@...ras.ru>
To: Namhyung Kim <namhyung@...nel.org>
cc: Arnaldo Carvalho de Melo <acme@...nel.org>, 
    Ian Rogers <irogers@...gle.com>, Kan Liang <kan.liang@...ux.intel.com>, 
    Jiri Olsa <jolsa@...nel.org>, Adrian Hunter <adrian.hunter@...el.com>, 
    Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...nel.org>, 
    LKML <linux-kernel@...r.kernel.org>, linux-perf-users@...r.kernel.org
Subject: Re: [PATCH 1/2] perf symbol: Set binary_type of dso when loading

Hi,

On Fri, 26 Apr 2024, Namhyung Kim wrote:

> For the kernel dso, it sets the binary type of dso when loading the
> symbol table.  But it seems not to do that for user DSOs.  Actually
> it sets the symtab type only.  It's not clear why we want to maintain
> the two separately but it uses the binary type info before getting
> the disassembly.
> 
> Let's use the symtab type as binary type too if it's not set.  I think
> it's ok to set the binary type when it founds a symsrc whether or not
> it has actual symbols.
> 
> Signed-off-by: Namhyung Kim <namhyung@...nel.org>

Any chance this can be applied and propagated to stable? Annotating
functions outside of the main executable is broken otherwise (regressed
since 873a83731f1c ("perf annotate: Skip DSOs not found")).

Tested-by: Alexander Monakov <amonakov@...ras.ru>

> ---
>  tools/perf/util/symbol.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
> index 7772a4d3e66c..63936269ec15 100644
> --- a/tools/perf/util/symbol.c
> +++ b/tools/perf/util/symbol.c
> @@ -1927,6 +1927,9 @@ int dso__load(struct dso *dso, struct map *map)
>  		if (next_slot) {
>  			ss_pos++;
>  
> +			if (dso__binary_type(dso) == DSO_BINARY_TYPE__NOT_FOUND)
> +				dso__set_binary_type(dso, symtab_type);
> +
>  			if (syms_ss && runtime_ss)
>  				break;
>  		} else {
>