linux-kernel - Re: [PATCH] tools lib traceevent: Fix "robust" test of do_generate_dynamic_list

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Date:   Tue, 13 Aug 2019 17:21:12 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Wang Nan <wangnan0@...wei.com>, He Kuang <hekuang@...wei.com>,
        Michal Marek <mmarek@...e.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Stephane Eranian <eranian@...gle.com>,
        Paul Turner <pjt@...gle.com>,
        David Carrillo-Cisneros <davidcc@...gle.com>,
        Tzvetomir Stoyanov <tstoyanov@...are.com>
Subject: Re: [PATCH] tools lib traceevent: Fix "robust" test of
 do_generate_dynamic_list_file

On Mon, 5 Aug 2019 13:01:50 -0400
Steven Rostedt <rostedt@...dmis.org> wrote:

> [
>   Not sure why I wasn't Cc'd on the original patch (or the one before that)
>   but I guess I need to add tools/lib/traceevent under MAINTAINERs for
>   perhaps tracing?
> ]
> 

Ping?

-- Steve

> From: "Steven Rostedt (VMware)" <rostedt@...dmis.org>
> 
> The tools/lib/traceevent/Makefile had a test added to it to detect a failure
> of the "nm" when making the dynamic list file (whatever that is). The
> problem is that the test sorts the values "U W w" and some versions of sort
> will place "w" ahead of "W" (even though it has a higher ASCII value, and
> break the test.
> 
> Add 'tr "w" "W"' to merge the two and not worry about the ordering.
> 
> Cc: stable@...r.kernel.org
> Fixes: 6467753d61399 ("tools lib traceevent: Robustify do_generate_dynamic_list_file")
> Reported-by: Tzvetomir Stoyanov <tstoyanov@...are.com>
> Signed-off-by: Steven Rostedt (VMware) <rostedt@...dmis.org>
> ---
>  tools/lib/traceevent/Makefile | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/lib/traceevent/Makefile b/tools/lib/traceevent/Makefile
> index 3292c290654f..8352d53dcb5a 100644
> --- a/tools/lib/traceevent/Makefile
> +++ b/tools/lib/traceevent/Makefile
> @@ -266,8 +266,8 @@ endef
>  
>  define do_generate_dynamic_list_file
>  	symbol_type=`$(NM) -u -D $1 | awk 'NF>1 {print $$1}' | \
> -	xargs echo "U W w" | tr ' ' '\n' | sort -u | xargs echo`;\
> -	if [ "$$symbol_type" = "U W w" ];then				\
> +	xargs echo "U w W" | tr 'w ' 'W\n' | sort -u | xargs echo`;\
> +	if [ "$$symbol_type" = "U W" ];then				\
>  		(echo '{';						\
>  		$(NM) -u -D $1 | awk 'NF>1 {print "\t"$$2";"}' | sort -u;\
>  		echo '};';						\