Re: [PATCH] tools lib traceevent: Fix "robust" test of do_generate_dynamic_list_file

[Steven Rostedt]

On Mon, 5 Aug 2019 13:01:50 -0400
Steven Rostedt <rostedt@xxxxxxxxxxx> 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@xxxxxxxxxxx>
> 
> 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@xxxxxxxxxxxxxxx
> Fixes: 6467753d61399 ("tools lib traceevent: Robustify do_generate_dynamic_list_file")
> Reported-by: Tzvetomir Stoyanov <tstoyanov@xxxxxxxxxx>
> Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
> ---
>  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 '};';						\