linux-kernel - Re: [PATCH v2 0/3] tools/perf: Fix perf probe crash by clang DWARF5 file

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Date:   Thu, 3 Nov 2022 09:31:55 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Namhyung Kim <namhyung@...nel.org>
Cc:     "Masami Hiramatsu (Google)" <mhiramat@...nel.org>,
        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>, linux-perf-users@...r.kernel.org,
        linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [PATCH v2 0/3] tools/perf: Fix perf probe crash by clang DWARF5
 file

Em Tue, Nov 01, 2022 at 05:03:51PM -0700, Namhyung Kim escreveu:
> On Tue, Nov 1, 2022 at 6:48 AM Masami Hiramatsu (Google)
> <mhiramat@...nel.org> wrote:
> > Here is the 2nd version of the patches for perf probe which improves the
> > robustness against clang DWARF5 file.
> >
> > Since the Clang generates a bit different DWARF5 file, the perf probe
> > crashes or failes to analyze it. There are actually fragile code against
> > it, so I fixed it ([1/3]) to avoid crash by SEGV. And make it accepts
> > Clang's DWARF5 file ([2/3],[3/3]).

> > Masami Hiramatsu (Google) (3):
> >       tools/perf: Fix to avoid crashing if DW_AT_decl_file is NULL
> >       tools/perf: Fix to use dwarf_attr_integrate for generic attr accessor
> >       tools/perf: Fix to get declared file name from clang DWARF5
> 
> Acked-by: Namhyung Kim <namhyung@...nel.org>

Thanks, applied.

- Arnaldo