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Date: Wed, 1 Feb 2023 22:21:57 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Namhyung Kim <namhyung@...nel.org>,
Henry Castro <hcvcastro@...il.com>
Cc: Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Jiri Olsa <jolsa@...nel.org>,
"Masami Hiramatsu (Google)" <mhiramat@...nel.org>,
linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] perf: fix the probe finder location (.dwo files)
Em Sun, Jan 29, 2023 at 07:21:28PM -0400, Henry Castro escreveu:
> If the file object is compiled using -gsplit-dwarf,
> the probe finder location will fail.
>
> Signed-off-by: Henry Castro <hcvcastro@...il.com>
> ---
>
> Hi,
>
> Polite ping? Any feedback?
Namhyung, are you ok now? Masami, can you please take a look and provide
an Acked-by or Reviewed-by?
- Arnaldo
> Regards
> Henry
>
> tools/perf/util/probe-finder.c | 14 ++++++++++++++
> 1 file changed, 14 insertions(+)
>
> diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
> index 50d861a80f57..5f6781e712db 100644
> --- a/tools/perf/util/probe-finder.c
> +++ b/tools/perf/util/probe-finder.c
> @@ -1200,6 +1200,20 @@ static int debuginfo__find_probe_location(struct debuginfo *dbg,
> continue;
> }
>
> +#if _ELFUTILS_PREREQ(0, 171)
> + {
> + uint8_t unit_type;
> + Dwarf_Die cudie, subdie;
> +
> + /* Check separate debug information file. */
> + if (dwarf_cu_info(pf->cu_die.cu, NULL,
> + &unit_type, &cudie,
> + &subdie, NULL,
> + NULL, NULL) == 0
> + && unit_type == DW_UT_skeleton)
> + pf->cu_die = subdie;
> + }
> +#endif
> /* Check if target file is included. */
> if (pp->file)
> pf->fname = cu_find_realpath(&pf->cu_die, pp->file);
> --
> 2.20.1
>
--
- Arnaldo
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