remarkable-linux/tools/testing/selftests/ftrace/test.d/kprobe/kretprobe_maxactive.tc

#!/bin/sh
# description: Kretprobe dynamic event with maxactive

[ -f kprobe_events ] || exit_unsupported # this is configurable
grep -q 'r\[maxactive\]' README || exit_unsupported # this is older version

echo > kprobe_events

# Test if we successfully reject unknown messages
if echo 'a:myprobeaccept inet_csk_accept' > kprobe_events; then false; else true; fi

# Test if we successfully reject too big maxactive
if echo 'r1000000:myprobeaccept inet_csk_accept' > kprobe_events; then false; else true; fi

# Test if we successfully reject unparsable numbers for maxactive
if echo 'r10fuzz:myprobeaccept inet_csk_accept' > kprobe_events; then false; else true; fi

# Test for kretprobe with event name without maxactive
echo 'r:myprobeaccept inet_csk_accept' > kprobe_events
grep myprobeaccept kprobe_events
test -d events/kprobes/myprobeaccept
echo '-:myprobeaccept' >> kprobe_events

# Test for kretprobe with event name with a small maxactive
echo 'r10:myprobeaccept inet_csk_accept' > kprobe_events
grep myprobeaccept kprobe_events
test -d events/kprobes/myprobeaccept
echo '-:myprobeaccept' >> kprobe_events

# Test for kretprobe without event name without maxactive
echo 'r inet_csk_accept' > kprobe_events
grep inet_csk_accept kprobe_events
echo > kprobe_events

# Test for kretprobe without event name with a small maxactive
echo 'r10 inet_csk_accept' > kprobe_events
grep inet_csk_accept kprobe_events
echo > kprobe_events

clear_trace