linux-kernel - Re: [PATCH 3/3] ftracetests: Add test to test event filter logic

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Date:	Wed, 03 Dec 2014 18:26:43 +0900
From:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Theodore Tso <tytso@....edu>,
	Alexei Starovoitov <ast@...mgrid.com>
Subject: Re: [PATCH 3/3] ftracetests: Add test to test event filter logic

(2014/12/03 12:13), Steven Rostedt wrote:
> From: "Steven Rostedt (Red Hat)" <rostedt@...dmis.org>
> 
> Add a test to test the event filter logic. It currently tests the
> following filters against sched:sched_switch event.
> 
>    ( prev_pid != 0 )
>    ( prev_pid == 0 )
>    ( prev_pid < 100 )
>    ( prev_pid <= $$ )
>    ( prev_pid > 100 )
>    ( prev_pid >= $$ )
>   ! ( prev_pid != 0 )
>   ! ( prev_pid == 0 )
>   ! ( prev_pid < 100 )
>   ! ( prev_pid <= $$ )
>   ! ( prev_pid > 100 )
>   ! ( prev_pid >= $$ )
>    ( prev_pid != 0 && next_pid > 10 )
>    ( prev_pid != 0 || next_pid > 10 )
>   ! ( prev_pid != 0 && next_pid > 10 )
>   ! ( prev_pid != 0 || next_pid > 10 )
>    ( prev_pid & 1 )
>    ( prev_pid & 2 )
>    ( prev_pid & 4 )
>    ( prev_pid & 8 )
>    ( prev_pid & 16 )
>   ! ( prev_pid & 1 )
>   ! ( prev_pid & 2 )
>   ! ( prev_pid & 4 )
>   ! ( prev_pid & 8 )
>   ! ( prev_pid & 16 )
>    ( next_comm ~ "ftrace-test-fil" )
>    ( next_comm != "ftrace-test-fil" )
>   ! ( next_comm ~ "ftrace-test-fil" )
>   ! ( next_comm != "ftrace-test-fil" )
> 

Hmm, this uses some bash-only syntax, here is the result of checkbashisms.

# checkbashisms tools/testing/selftests/ftrace/test.d/ftrace/filter.tc
possible bashism in tools/testing/selftests/ftrace/test.d/ftrace/filter.tc line 70 (should be 'b = a'):
            if [ "$not" == '!' ]; then
possible bashism in tools/testing/selftests/ftrace/test.d/ftrace/filter.tc line 99 (should be 'b = a'):
            if [ "$not" == '!' ]; then
possible bashism in tools/testing/selftests/ftrace/test.d/ftrace/filter.tc line 137 (let ...):
    let x=1
possible bashism in tools/testing/selftests/ftrace/test.d/ftrace/filter.tc line 148 (let ...):
            let val="$pid & $x"
possible bashism in tools/testing/selftests/ftrace/test.d/ftrace/filter.tc line 155 (should be 'b = a'):
            elif [ "$not" == '!' ]; then
possible bashism in tools/testing/selftests/ftrace/test.d/ftrace/filter.tc line 160 (let ...):
        let x="$x << 1"
possible bashism in tools/testing/selftests/ftrace/test.d/ftrace/filter.tc line 182 (should be 'b = a'):
            if [ "$not" == '!' ]; then

to allow run this on busybox or dash, we'd better clean it.

> Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
> ---
[...]
> +# Test more complex compares (&& and !!)
> +test_cmp2 -ne 0 -a -gt 10 "!= 0" "> 10" "&&" ''
> +test_cmp2 -ne 0 -o -gt 10 "!= 0" "> 10" "||" ''

This might better be
test_cmp2 -ne 0 -a -gt 10 "!= 0" "&&" "> 10" ''
test_cmp2 -ne 0 -o -gt 10 "!= 0" "||" "> 10" ''

:-)

> +
> +test_cmp2 -ne 0 -a -gt 10 "!= 0" "> 10" "&&" '!'
> +test_cmp2 -ne 0 -o -gt 10 "!= 0" "> 10" "||" '!'

Thank you,


-- 
Masami HIRAMATSU
Software Platform Research Dept. Linux Technology Research Center
Hitachi, Ltd., Yokohama Research Laboratory
E-mail: masami.hiramatsu.pt@...achi.com


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