linux-kernel - Re: [PATCH] perf script: Add --[no-]-demangle/--[no-]-demangle-kernel

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Date:	Thu, 27 Aug 2015 11:13:23 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Yannick Brosseau <scientist@...com>
Cc:	ak@...ux.intel.com, jolsa@...nel.org, linux-kernel@...r.kernel.org,
	Mark Drayton <mbd@...com>
Subject: Re: [PATCH] perf script: Add --[no-]-demangle/--[no-]-demangle-kernel

Em Wed, Aug 26, 2015 at 12:18:15PM -0700, Yannick Brosseau escreveu:
> From: Mark Drayton <mbd@...com>
> 
> Summary: Sometimes when post-processing output from `perf script` one
> does not want to demangle C++ symbol names. Add an option to allow this.
> Also add --[no-]demangle-kernel to be consistent with top/report/probe.
> 
> Signed-off-by: Mark Drayton <mbd@...com>
> Signed-off-by: Yannick Brosseau <scientist@...com>

Thanks, applied after fixing up it wrt other changes in
builtin-script.c, next time, for new features like this, make sure it
applies to my perf/core branch at:

git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git

- Arnaldo

> ---
>  tools/perf/Documentation/perf-script.txt | 7 +++++++
>  tools/perf/builtin-script.c              | 4 ++++
>  2 files changed, 11 insertions(+)
> 
> diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
> index c82df57..347c73a 100644
> --- a/tools/perf/Documentation/perf-script.txt
> +++ b/tools/perf/Documentation/perf-script.txt
> @@ -222,6 +222,13 @@ OPTIONS
>  --show-mmap-events
>  	Display mmap related events (e.g. MMAP, MMAP2).
>  
> +--demangle::
> +	Demangle symbol names to human readable form. It's enabled by default,
> +	disable with --no-demangle.
> +
> +--demangle-kernel::
> +	Demangle kernel symbol names to human readable form (for C++ kernels).
> +
>  --header
>  	Show perf.data header.
>  
> diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
> index 24809787..f3b3ba0 100644
> --- a/tools/perf/builtin-script.c
> +++ b/tools/perf/builtin-script.c
> @@ -1622,6 +1622,10 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
>  	OPT_CALLBACK_OPTARG(0, "itrace", &itrace_synth_opts, NULL, "opts",
>  			    "Instruction Tracing options",
>  			    itrace_parse_synth_opts),
> +	OPT_BOOLEAN(0, "demangle", &symbol_conf.demangle,
> +		    "Enable symbol demangling"),
> +	OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
> +		    "Enable kernel symbol demangling"),
>  	OPT_END()
>  	};
>  	const char * const script_subcommands[] = { "record", "report", NULL };
> -- 
> 2.1.4
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