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
8check_filter_file set_ftrace_filter
9
10# prepare
11echo nop > current_tracer
12echo _do_fork > set_ftrace_filter
13echo 'p:testprobe _do_fork' > kprobe_events
14
15# kprobe on / ftrace off
16echo 1 > events/kprobes/testprobe/enable
17echo > trace
18( echo "forked")
19grep testprobe trace
20! grep '_do_fork <-' trace
21
22# kprobe on / ftrace on
23echo function > current_tracer
24echo > trace
25( echo "forked")
26grep testprobe trace
27grep '_do_fork <-' trace
28
29# kprobe off / ftrace on
30echo 0 > events/kprobes/testprobe/enable
31echo > trace
32( echo "forked")
33! grep testprobe trace
34grep '_do_fork <-' trace
35
36# kprobe on / ftrace on
37echo 1 > events/kprobes/testprobe/enable
38echo function > current_tracer
39echo > trace
40( echo "forked")
41grep testprobe trace
42grep '_do_fork <-' trace
43
44# kprobe on / ftrace off
45echo nop > current_tracer
46echo > trace
47( echo "forked")
48grep testprobe trace
49! grep '_do_fork <-' trace
50