1 #!/bin/sh
2 # SPDX-License-Identifier: GPL-2.0
3 # description: Test ftrace direct functions against tracers
4
5 rmmod ftrace-direct ||:
6 if ! modprobe ftrace-direct ; then
7 echo "No ftrace-direct sample module - please make CONFIG_SAMPLE_FTRACE_DIRECT=m"
8 exit_unresolved;
9 fi
10
11 echo "Let the module run a little"
12 sleep 1
13
14 grep -q "my_direct_func: waking up" trace
15
16 rmmod ftrace-direct
17
18 test_tracer() {
19 tracer=$1
20
21 # tracer -> direct -> no direct > no tracer
22 echo $tracer > current_tracer
23 modprobe ftrace-direct
24 rmmod ftrace-direct
25 echo nop > current_tracer
26
27 # tracer -> direct -> no tracer > no direct
28 echo $tracer > current_tracer
29 modprobe ftrace-direct
30 echo nop > current_tracer
31 rmmod ftrace-direct
32
33 # direct -> tracer -> no tracer > no direct
34 modprobe ftrace-direct
35 echo $tracer > current_tracer
36 echo nop > current_tracer
37 rmmod ftrace-direct
38
39 # direct -> tracer -> no direct > no notracer
40 modprobe ftrace-direct
41 echo $tracer > current_tracer
42 rmmod ftrace-direct
43 echo nop > current_tracer
44 }
45
46 for t in `cat available_tracers`; do
47 if [ "$t" != "nop" ]; then
48 test_tracer $t
49 fi
50 done
51
52 echo nop > current_tracer
53 rmmod ftrace-direct ||:
54
55 # Now do the same thing with another direct function registered
56 echo "Running with another ftrace direct function"
57
58 rmmod ftrace-direct-too ||:
59 modprobe ftrace-direct-too
60
61 for t in `cat available_tracers`; do
62 if [ "$t" != "nop" ]; then
63 test_tracer $t
64 fi
65 done
66
67 echo nop > current_tracer
68 rmmod ftrace-direct ||:
69 rmmod ftrace-direct-too ||:
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.