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SubjectRe: [PATCH 2/3] ftracetest: Clear trace buffer after running kprobe testcases
(2014/11/06 11:04), Namhyung Kim wrote:
> The kprobe testcases create, use and delete dynamic events during the
> test but didn't clear the trace buffer so it'll leave the result after
> it finishes.
>
> # ./ftracetest
> ...
>
> # cat trace
> # tracer: nop
> #
> # entries-in-buffer/entries-written: 2/2 #P:12
> #
> # _-----=> irqs-off
> # / _----=> need-resched
> # | / _---=> hardirq/softirq
> # || / _--=> preempt-depth
> # ||| / delay
> # TASK-PID CPU# |||| TIMESTAMP FUNCTION
> # | | | |||| | |
> ftracetest-26474 [009] d..1 79417.143782: Unknown type 1099
> ftracetest-26498 [009] d..1 79417.208034: Unknown type 1101
>
> Signed-off-by: Namhyung Kim <namhyung@kernel.org>

Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>

Thank you!

> ---
> tools/testing/selftests/ftrace/test.d/kprobe/add_and_remove.tc | 1 +
> tools/testing/selftests/ftrace/test.d/kprobe/busy_check.tc | 1 +
> tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args.tc | 1 +
> tools/testing/selftests/ftrace/test.d/kprobe/kretprobe_args.tc | 1 +
> 4 files changed, 4 insertions(+)
>
> diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/add_and_remove.tc b/tools/testing/selftests/ftrace/test.d/kprobe/add_and_remove.tc
> index 1b8b665ab2b3..a5a426211129 100644
> --- a/tools/testing/selftests/ftrace/test.d/kprobe/add_and_remove.tc
> +++ b/tools/testing/selftests/ftrace/test.d/kprobe/add_and_remove.tc
> @@ -9,3 +9,4 @@ echo p:myevent do_fork > kprobe_events
> grep myevent kprobe_events
> test -d events/kprobes/myevent
> echo > kprobe_events
> +clear_trace
> diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/busy_check.tc b/tools/testing/selftests/ftrace/test.d/kprobe/busy_check.tc
> index b55c84003587..d8c7bb6581fe 100644
> --- a/tools/testing/selftests/ftrace/test.d/kprobe/busy_check.tc
> +++ b/tools/testing/selftests/ftrace/test.d/kprobe/busy_check.tc
> @@ -11,3 +11,4 @@ echo 1 > events/kprobes/myevent/enable
> echo > kprobe_events && exit 1 # this must fail
> echo 0 > events/kprobes/myevent/enable
> echo > kprobe_events # this must succeed
> +clear_trace
> diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args.tc b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args.tc
> index a603d3f8db7b..c45ee2761354 100644
> --- a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args.tc
> +++ b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args.tc
> @@ -12,5 +12,6 @@ echo 1 > events/kprobes/testprobe/enable
> ( echo "forked")
> echo 0 > events/kprobes/testprobe/enable
> echo "-:testprobe" >> kprobe_events
> +clear_trace
> test -d events/kprobes/testprobe && exit 1 || exit 0
>
> diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/kretprobe_args.tc b/tools/testing/selftests/ftrace/test.d/kprobe/kretprobe_args.tc
> index 283c29e7f7c4..31717985acc7 100644
> --- a/tools/testing/selftests/ftrace/test.d/kprobe/kretprobe_args.tc
> +++ b/tools/testing/selftests/ftrace/test.d/kprobe/kretprobe_args.tc
> @@ -12,4 +12,5 @@ echo 1 > events/kprobes/testprobe2/enable
> ( echo "forked")
> echo 0 > events/kprobes/testprobe2/enable
> echo '-:testprobe2' >> kprobe_events
> +clear_trace
> test -d events/kprobes/testprobe2 && exit 1 || exit 0
>


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




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