Open Menu / tools / testing / selftests / ftrace / test.d / dynevent / add_remove_eprobe.tc 
 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# description: Generic dynamic event - add/remove eprobe events
# requires: dynamic_events events/syscalls/sys_enter_chdir "<attached-group>.<attached-event> [<args>]":README

echo 0 > events/enable

clear_dynamic_events

SYSTEM="syscalls"
EVENT="sys_enter_chdir"
FIELD="filename"
EPROBE="eprobe_chdir"
OPTIONS="file=+0(\$filename):ustring"
echo "e:$EPROBE $SYSTEM/$EVENT $OPTIONS" >> dynamic_events

grep -q "$EPROBE" dynamic_events
test -d events/eprobes/$EPROBE

echo 1 > events/eprobes/$EPROBE/enable
cd /sys/kernel/tracing
echo 0 > events/eprobes/$EPROBE/enable

content=`grep -e 'file="/sys/kernel/tracing"\|(fault)' trace`
if [ -z "$content" ]; then
	exit_fail
fi

echo "-:$EPROBE" >> dynamic_events

! grep -q "$EPROBE" dynamic_events
! test -d events/eprobes/$EPROBE

# test various ways to remove the probe (already tested with just event name)

# With group name
echo "e:$EPROBE $SYSTEM/$EVENT $OPTIONS" >> dynamic_events
grep -q "$EPROBE" dynamic_events
test -d events/eprobes/$EPROBE
echo "-:eprobes/$EPROBE" >> dynamic_events
! grep -q "$EPROBE" dynamic_events
! test -d events/eprobes/$EPROBE

# With group name and system/event
echo "e:$EPROBE $SYSTEM/$EVENT $OPTIONS" >> dynamic_events
grep -q "$EPROBE" dynamic_events
test -d events/eprobes/$EPROBE
echo "-:eprobes/$EPROBE $SYSTEM/$EVENT" >> dynamic_events
! grep -q "$EPROBE" dynamic_events
! test -d events/eprobes/$EPROBE

# With just event name and system/event
echo "e:$EPROBE $SYSTEM/$EVENT $OPTIONS" >> dynamic_events
grep -q "$EPROBE" dynamic_events
test -d events/eprobes/$EPROBE
echo "-:$EPROBE $SYSTEM/$EVENT" >> dynamic_events
! grep -q "$EPROBE" dynamic_events
! test -d events/eprobes/$EPROBE

# With just event name and system/event and options
echo "e:$EPROBE $SYSTEM/$EVENT $OPTIONS" >> dynamic_events
grep -q "$EPROBE" dynamic_events
test -d events/eprobes/$EPROBE
echo "-:$EPROBE $SYSTEM/$EVENT $OPTIONS" >> dynamic_events
! grep -q "$EPROBE" dynamic_events
! test -d events/eprobes/$EPROBE

# With group name and system/event and options
echo "e:$EPROBE $SYSTEM/$EVENT $OPTIONS" >> dynamic_events
grep -q "$EPROBE" dynamic_events
test -d events/eprobes/$EPROBE
echo "-:eprobes/$EPROBE $SYSTEM/$EVENT $OPTIONS" >> dynamic_events
! grep -q "$EPROBE" dynamic_events
! test -d events/eprobes/$EPROBE

# Finally make sure what is in the dynamic_events file clears it too
echo "e:$EPROBE $SYSTEM/$EVENT $OPTIONS" >> dynamic_events
LINE=`sed -e '/$EPROBE/s/^e/-/' < dynamic_events`
test -d events/eprobes/$EPROBE
echo "-:eprobes/$EPROBE $SYSTEM/$EVENT $OPTIONS" >> dynamic_events
! grep -q "$EPROBE" dynamic_events
! test -d events/eprobes/$EPROBE

if grep -q "e\[:\[<group>/]\[<event>]]" README; then
	echo "e:mygroup/ $SYSTEM/$EVENT $OPTIONS" >> dynamic_events
	test -d events/mygroup
	echo "-:mygroup/" >> dynamic_events
	! test -d events/mygroup
fi

clear_trace