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selftests/ftrace: Test kprobe-event argument with various bitsize

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Improve the kprobe-event with argument types testcase
to test it with various bitsize.
kprobe-event argument can be recorded in given types with
various bitsize (8, 16, 32, 64), thus the type testcase
should test the different bitsize too.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
This commit is contained in:
Masami Hiramatsu 2018-08-30 23:19:03 +09:00 • committed by Shuah Khan (Samsung OSG)
parent 1e51263ef4
commit 00b2f2bc3a
1 changed files with 32 additions and 16 deletions
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48
tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_type.tc
View file

@ -6,29 +6,45 @@
grep "x8/16/32/64" README > /dev/null || exit_unsupported # version issue grep "x8/16/32/64" README > /dev/null || exit_unsupported # version issue
echo 'p:testprobe _do_fork $stack0:s32 $stack0:u32 $stack0:x32 $stack0:b8@4/32' > kprobe_events gen_event() { # Bitsize
grep testprobe kprobe_events echo "p:testprobe _do_fork \$stack0:s$1 \$stack0:u$1 \$stack0:x$1 \$stack0:b4@4/$1"
test -d events/kprobes/testprobe }
echo 1 > events/kprobes/testprobe/enable check_types() { # s-type u-type x-type bf-type width
( echo "forked") test $# -eq 5
echo 0 > events/kprobes/testprobe/enable CW=$5
ARGS=`tail -n 1 trace | sed -e 's/.* arg1=\(.*\) arg2=\(.*\) arg3=\(.*\) arg4=\(.*\)/\1 \2 \3 \4/'` CW=$((CW / 4))
X1=`printf "%x" $1 | tail -c ${CW}`
check_types() {
X1=`printf "%x" $1 | tail -c 8`
X2=`printf "%x" $2` X2=`printf "%x" $2`
X3=`printf "%x" $3` X3=`printf "%x" $3`
test $X1 = $X2 test $X1 = $X2
test $X2 = $X3 test $X2 = $X3
test 0x$X3 = $3 test 0x$X3 = $3
B4=`printf "%02x" $4` B4=`printf "%1x" $4`
B3=`echo -n $X3 | tail -c 3 | head -c 2` B3=`printf "%03x" 0x$X3 | tail -c 2 | head -c 1`
test $B3 = $B4 test $B3 = $B4
} }
check_types $ARGS
echo "-:testprobe" >> kprobe_events for width in 64 32 16 8; do
clear_trace : "Add new event with basic types"
test -d events/kprobes/testprobe && exit_fail || exit_pass gen_event $width > kprobe_events
grep testprobe kprobe_events
test -d events/kprobes/testprobe
: "Trace the event"
echo 1 > events/kprobes/testprobe/enable
( echo "forked")
echo 0 > events/kprobes/testprobe/enable
: "Confirm the arguments is recorded in given types correctly"
ARGS=`grep "testprobe" trace | sed -e 's/.* arg1=\(.*\) arg2=\(.*\) arg3=\(.*\) arg4=\(.*\)/\1 \2 \3 \4/'`
check_types $ARGS $width
: "Clear event for next loop"
echo "-:testprobe" >> kprobe_events
clear_trace
done
exit_pass