linux-kernel - Re: [PATCH v3 13/14] tracing/selftest: Add selftests to test trace

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Date:   Thu, 31 May 2018 08:09:41 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Tom Zanussi <tom.zanussi@...ux.intel.com>,
        Clark Williams <williams@...hat.com>,
        Karim Yaghmour <karim.yaghmour@...rsys.com>,
        Brendan Gregg <bgregg@...flix.com>,
        Joel Fernandes <joel@...lfernandes.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Yann Ylavic <ylavic.dev@...il.com>,
        linux-rt-users@...r.kernel.org, Shuah Khan <shuahkhan@...il.com>
Subject: Re: [PATCH v3 13/14] tracing/selftest: Add selftests to test
 trace_marker histogram triggers

On Mon, 28 May 2018 21:20:55 -0400
Steven Rostedt <rostedt@...dmis.org> wrote:

> On Mon, 28 May 2018 01:32:58 +0900
> Masami Hiramatsu <mhiramat@...nel.org> wrote:
> 
> > Hi Steve,
> > 
> > On Fri, 25 May 2018 17:13:53 -0400
> > Steven Rostedt <rostedt@...dmis.org> wrote:
> > 
> > > On Fri, 25 May 2018 17:12:29 -0400
> > > Steven Rostedt <rostedt@...dmis.org> wrote:
> > > 
> > >    
> > > > #!/bin/sh  
> > > 
> > > Hmm, I think I need to make this #!/bin/bash
> > >   
> > > > test_trace() {
> > > >     file=$1
> > > >     x=$2
> > > > 
> > > >     cat $file | while read line; do
> > > > 	if [ "$line" != "${line/\#/}" ]; then
> > > > 	    continue
> > > > 	fi
> > > > 	echo "testing $line for >$x<"
> > > > 	if [ "$line" == "${line/>$x</}" ]; then  
> > > 
> > > The ${line/>$x</} is unique to bash I believe.  
> > 
> > Hmm, could you try to use only posix-shell based test ?
> > Since I would like to keep this can run on small 
> > environment, like busybox, etc.
> >
> 
> Like something like this?

This looks good to me. :)

Acked-by: Masami Hiramatsu <mhiramat@...nel.org>

Thanks,

> 
> -- Steve
> 
> diff --git a/tools/testing/selftests/ftrace/test.d/trigger/trigger-trace-marker-snapshot.tc b/tools/testing/selftests/ftrace/test.d/trigger/trigger-trace-marker-snapshot.tc
> index c6c50a2..3a3c33d 100644
> --- a/tools/testing/selftests/ftrace/test.d/trigger/trigger-trace-marker-snapshot.tc
> +++ b/tools/testing/selftests/ftrace/test.d/trigger/trigger-trace-marker-snapshot.tc
> @@ -41,11 +41,13 @@ test_trace() {
>      x=$2
>  
>      cat $file | while read line; do
> -	if [ "$line" != "${line/\#/}" ]; then
> +	comment=`echo $line | sed -e 's/^#//'`
> +	if [ "$line" != "$comment" ]; then
>  	    continue
>  	fi
>  	echo "testing $line for >$x<"
> -	if [ "$line" == "${line/>$x</}" ]; then
> +	match=`echo $line | sed -e "s/>$x<//"`
> +	if [ "$line" == "$match" ]; then
>  	    fail "$line does not have >$x< in it"
>  	fi
>  	let x=$x+2


-- 
Masami Hiramatsu <mhiramat@...nel.org>