linux_kernel/tools/testing/selftests/ftrace/test.d/trigger/trigger-traceonoff.tc

#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# description: event trigger - test traceon/off trigger

do_reset() {
    reset_trigger
    echo > set_event
    clear_trace
}

fail() { #msg
    do_reset
    echo $1
    exit_fail
}

if [ ! -f set_event -o ! -d events/sched ]; then
    echo "event tracing is not supported"
    exit_unsupported
fi

if [ ! -f events/sched/sched_process_fork/trigger ]; then
    echo "event trigger is not supported"
    exit_unsupported
fi

reset_tracer
do_reset

echo "Test traceoff trigger"
echo 1 > tracing_on
echo 'traceoff' > events/sched/sched_process_fork/trigger
( echo "forked")
if [ `cat tracing_on` -ne 0 ]; then
    fail "traceoff trigger on sched_process_fork did not work"
fi

reset_trigger

echo "Test traceon trigger"
echo 0 > tracing_on
echo 'traceon' > events/sched/sched_process_fork/trigger
( echo "forked")
if [ `cat tracing_on` -ne 1 ]; then
    fail "traceoff trigger on sched_process_fork did not work"
fi

reset_trigger

echo "Test semantic error for traceoff/on trigger"
! echo 'traceoff:badparam' > events/sched/sched_process_fork/trigger
! echo 'traceoff+0' > events/sched/sched_process_fork/trigger
echo 'traceon' > events/sched/sched_process_fork/trigger
! echo 'traceon' > events/sched/sched_process_fork/trigger
! echo 'traceoff' > events/sched/sched_process_fork/trigger

do_reset

exit 0