1#!/bin/sh 2# SPDX-License-Identifier: GPL-2.0 3# description: Kprobe dynamic event with function tracer 4 5[ -f kprobe_events ] || exit_unsupported # this is configurable 6grep function available_tracers || exit_unsupported # this is configurable 7 8# prepare 9echo nop > current_tracer 10echo _do_fork > set_ftrace_filter 11echo 'p:testprobe _do_fork' > kprobe_events 12 13# kprobe on / ftrace off 14echo 1 > events/kprobes/testprobe/enable 15echo > trace 16( echo "forked") 17grep testprobe trace 18! grep '_do_fork <-' trace 19 20# kprobe on / ftrace on 21echo function > current_tracer 22echo > trace 23( echo "forked") 24grep testprobe trace 25grep '_do_fork <-' trace 26 27# kprobe off / ftrace on 28echo 0 > events/kprobes/testprobe/enable 29echo > trace 30( echo "forked") 31! grep testprobe trace 32grep '_do_fork <-' trace 33 34# kprobe on / ftrace on 35echo 1 > events/kprobes/testprobe/enable 36echo function > current_tracer 37echo > trace 38( echo "forked") 39grep testprobe trace 40grep '_do_fork <-' trace 41 42# kprobe on / ftrace off 43echo nop > current_tracer 44echo > trace 45( echo "forked") 46grep testprobe trace 47! grep '_do_fork <-' trace 48