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Commit 153aae5f authored by Masami Hiramatsu's avatar Masami Hiramatsu Committed by Steven Rostedt
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selftests: ftrace: Add a testcase for types of kprobe event 

Add a testcase for types of kprobe event. This checks
kprobe event can accept and correctly expressed the
arguments typed as s32, u32, x32 and bitfield.

Here is the test result.
  -----
  # ./ftracetest test.d/kprobe/kprobe_args_type.tc
  === Ftrace unit tests ===
  [1] Kprobes event arguments with types	[PASS]

  # of passed:  1
  # of failed:  0
  # of unresolved:  0
  # of untested:  0
  # of unsupported:  0
  # of xfailed:  0
  # of undefined(test bug):  0
  -----

Link: http://lkml.kernel.org/r/147928409063.22982.3499119203875115458.stgit@devbox



Signed-off-by: default avatarMasami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
parent 60c1afbf

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

0 → 100644
+37 −0
Original line number Diff line number Diff line 
#!/bin/sh

# description: Kprobes event arguments with types



[ -f kprobe_events ] || exit_unsupported # this is configurable



grep "x8/16/32/64" README > /dev/null || exit_unsupported # version issue



echo 0 > events/enable

echo > kprobe_events

enable_tracing



echo 'p:testprobe _do_fork $stack0:s32 $stack0:u32 $stack0:x32 $stack0:b8@4/32' > kprobe_events

grep testprobe kprobe_events

test -d events/kprobes/testprobe



echo 1 > events/kprobes/testprobe/enable

( echo "forked")

echo 0 > events/kprobes/testprobe/enable

ARGS=`tail -n 1 trace | sed -e 's/.* arg1=\(.*\) arg2=\(.*\) arg3=\(.*\) arg4=\(.*\)/\1 \2 \3 \4/'`



check_types() {

  X1=`printf "%x" $1 | tail -c 8`

  X2=`printf "%x" $2`

  X3=`printf "%x" $3`

  test $X1 = $X2

  test $X2 = $X3

  test 0x$X3 = $3



  B4=`printf "%x" $4`

  B3=`echo -n $X3 | tail -c 3 | head -c 2`

  test $B3 = $B4

}

check_types $ARGS



echo "-:testprobe" >> kprobe_events

clear_trace

test -d events/kprobes/testprobe && exit 1 || exit 0