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

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Date:   Tue, 13 Aug 2019 18:35:08 -0300
From:   Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.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

Em Tue, Aug 13, 2019 at 05:21:12PM -0400, Steven Rostedt escreveu:
> 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?

Will apply later today, thanks,

- Arnaldo
 
> -- 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 '};';						\

-- 

- Arnaldo