lkml.org 
[lkml]   [2016]   [Nov]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH -tip v2 2/6] selftests: ftrace: Initialize ftrace before each test
On Mon, 14 Nov 2016 13:12:00 -0500
Steven Rostedt <rostedt@goodmis.org> wrote:

> On Sun, 30 Oct 2016 15:54:10 +0900
> Masami Hiramatsu <mhiramat@kernel.org> wrote:
>
> > Reset ftrace to initial state before running each test.
> > This fixes some test cases to enable tracing before starting
> > trace test. This can avoid false-positive failure when
> > previous testcase fails while disabling tracing.
> >
> > Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
> > Suggested-by: Steven Rostedt <rostedt@goodmis.org>
> > ---
> > tools/testing/selftests/ftrace/ftracetest | 2 +-
> > tools/testing/selftests/ftrace/test.d/functions | 25 +++++++++++++++++++++++
> > 2 files changed, 26 insertions(+), 1 deletion(-)
> >
> > diff --git a/tools/testing/selftests/ftrace/ftracetest b/tools/testing/selftests/ftrace/ftracetest
> > index 4c6a0bf..a03d366 100755
> > --- a/tools/testing/selftests/ftrace/ftracetest
> > +++ b/tools/testing/selftests/ftrace/ftracetest
> > @@ -228,7 +228,7 @@ trap 'SIG_RESULT=$XFAIL' $SIG_XFAIL
> >
> > __run_test() { # testfile
> > # setup PID and PPID, $$ is not updated.
> > - (cd $TRACING_DIR; read PID _ < /proc/self/stat ; set -e; set -x; . $1)
> > + (cd $TRACING_DIR; read PID _ < /proc/self/stat; set -e; set -x; initialize_ftrace; . $1)
> > [ $? -ne 0 ] && kill -s $SIG_FAIL $SIG_PID
> > }
> >
> > diff --git a/tools/testing/selftests/ftrace/test.d/functions b/tools/testing/selftests/ftrace/test.d/functions
> > index c37262f..fbaf565 100644
> > --- a/tools/testing/selftests/ftrace/test.d/functions
> > +++ b/tools/testing/selftests/ftrace/test.d/functions
> > @@ -23,3 +23,28 @@ reset_trigger() { # reset all current setting triggers
> > done
> > }
> >
> > +reset_events_filter() { # reset all current setting filters
> > + grep -v ^none events/*/*/filter |
> > + while read line; do
> > + echo 0 > `echo $line | cut -f1 -d:`
> > + done
> > +}
> > +
> > +disable_events() {
> > + echo 0 > events/enable
> > +}
> > +
> > +initialize_ftrace() { # Reset ftrace to initial-state
> > +# As the initial state, ftrace will be set to nop tracer,
> > +# no events, no triggers, no filters, no function filters,
> > +# no probes, and tracing on.
> > + disable_tracing
> > + reset_tracer
> > + reset_trigger
> > + reset_events_filter
> > + disable_events
> > + echo | tee set_ftrace_* set_graph_* stack_trace_filter set_event_pid
>
> I just disabled function graph tracing, and this causes every test to
> fail.
>
> tee: set_graph_*: Permission denied

Oops, right. OK, I'll fix that.

Thanks!

>
> -- Steve
>
> > + echo > kprobe_events
> > + echo > uprobe_events
> > + enable_tracing
> > +}
>


--
Masami Hiramatsu <mhiramat@kernel.org>

\
 
 \ /
  Last update: 2016-11-15 07:33    [W:0.049 / U:1.112 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site