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Commit ce1ac64b authored by Namhyung Kim's avatar Namhyung Kim Committed by Steven Rostedt
Browse files

ftracetest: Clear trace buffer after running kprobe testcases 

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

Link: http://lkml.kernel.org/r/1415239470-28705-2-git-send-email-namhyung@kernel.org



Acked-by: default avatarMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
parent 347e0e46

tools/testing/selftests/ftrace/test.d/kprobe/add_and_remove.tc

+1 −0
Original line number Diff line number Diff line
@@ -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

tools/testing/selftests/ftrace/test.d/kprobe/busy_check.tc

+1 −0
Original line number Diff line number Diff line
@@ -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

tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args.tc

+1 −0
Original line number Diff line number Diff line
@@ -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

tools/testing/selftests/ftrace/test.d/kprobe/kretprobe_args.tc

+1 −0
Original line number Diff line number Diff line
@@ -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