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Commit 2c6c3946 authored by Namhyung Kim's avatar Namhyung Kim Committed by Shuah Khan
Browse files

kselftests/ftrace: Add a test case for event pid filtering 



Check event is filtered by set_event_pid and options/event-fork.

Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
Signed-off-by: default avatarShuah Khan <shuahkh@osg.samsung.com>
parent 5a614ec8

tools/testing/selftests/ftrace/test.d/event/event-pid.tc

0 → 100644
+72 −0
Original line number Diff line number Diff line 
#!/bin/sh

# description: event tracing - restricts events based on pid



do_reset() {

    echo > set_event

    echo > set_event_pid

    echo 0 > options/event-fork

    clear_trace

}



fail() { #msg

    do_reset

    echo $1

    exit $FAIL

}



yield() {

    ping localhost -c 1 || sleep .001 || usleep 1 || sleep 1

}



if [ ! -f set_event -o ! -d events/sched ]; then

    echo "event tracing is not supported"

    exit_unsupported

fi



if [ ! -f set_event_pid ]; then

    echo "event pid filtering is not supported"

    exit_unsupported

fi



reset_tracer

do_reset



echo 1 > events/sched/sched_switch/enable



yield



count=`cat trace | grep sched_switch | wc -l`

if [ $count -eq 0 ]; then

    fail "sched_switch events are not recorded"

fi



do_reset



read mypid rest < /proc/self/stat



echo $mypid > set_event_pid

echo 'sched:sched_switch' > set_event



yield



count=`cat trace | grep sched_switch | grep -v "pid=$mypid" | wc -l`

if [ $count -ne 0 ]; then

    fail "sched_switch events from other task are recorded"

fi



do_reset



echo $mypid > set_event_pid

echo 1 > options/event-fork

echo 1 > events/sched/sched_switch/enable



yield



count=`cat trace | grep sched_switch | grep -v "pid=$mypid" | wc -l`

if [ $count -eq 0 ]; then

    fail "sched_switch events from other task are not recorded"

fi



do_reset



exit 0