1 #!/bin/sh
2 # SPDX-License-Identifier: GPL-2.0
3 # description: Test ftrace direct functions against kprobes
4 # requires: kprobe_events
5
6 rmmod ftrace-direct ||:
7 if ! modprobe ftrace-direct ; then
8 echo "No ftrace-direct sample module - please build with CONFIG_SAMPLE_FTRACE_DIRECT=m"
9 exit_unresolved;
10 fi
11
12 echo "Let the module run a little"
13 sleep 1
14
15 grep -q "my_direct_func: waking up" trace
16
17 rmmod ftrace-direct
18
19 echo 'p:kwake wake_up_process task=$arg1' > kprobe_events
20
21 start_direct() {
22 echo > trace
23 modprobe ftrace-direct
24 sleep 1
25 grep -q "my_direct_func: waking up" trace
26 }
27
28 stop_direct() {
29 rmmod ftrace-direct
30 }
31
32 enable_probe() {
33 echo > trace
34 echo 1 > events/kprobes/kwake/enable
35 sleep 1
36 grep -q "kwake:" trace
37 }
38
39 disable_probe() {
40 echo 0 > events/kprobes/kwake/enable
41 }
42
43 test_kprobes() {
44 # probe -> direct -> no direct > no probe
45 enable_probe
46 start_direct
47 stop_direct
48 disable_probe
49
50 # probe -> direct -> no probe > no direct
51 enable_probe
52 start_direct
53 disable_probe
54 stop_direct
55
56 # direct -> probe -> no probe > no direct
57 start_direct
58 enable_probe
59 disable_probe
60 stop_direct
61
62 # direct -> probe -> no direct > no noprobe
63 start_direct
64 enable_probe
65 stop_direct
66 disable_probe
67 }
68
69 test_kprobes
70
71 # Now do this with a second registered direct function
72 echo "Running with another ftrace direct function"
73
74 modprobe ftrace-direct-too
75
76 test_kprobes
77
78 rmmod ftrace-direct-too
79
80 echo > kprobe_events
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