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
92
93
94
95
96
97
98
99
100
101
|
#!/bin/bash
TRACEFS=/sys/kernel/debug/tracing
EVENTS=${TRACEFS}/available_events
KPROBES=${TRACEFS}/kprobe_events
UPROBES=${TRACEFS}/uprobe_events
# Check permissions
if [[ ! -r ${EVENTS} ]]; then
echo "ERROR: Cannot read ${EVENTS}" > /dev/stderr
exit 1
elif [[ ! -w ${KPROBES} ]]; then
echo "ERROR: Cannot write to ${KPROBES}" > /dev/stderr
exit 1
elif [[ ! -w ${UPROBES} ]]; then
echo "ERROR: Cannot write to ${UPROBES}" > /dev/stderr
exit 1
fi
# Scan the list of events for any orphaned DTrace probes
{
ps -C dtrace -o pid=
echo '==='
cat ${EVENTS}
} | \
gawk -v kfn=${KPROBES} -v ufn=${UPROBES} \
'function getTimestamp(dt) {
cmd = "date +\"%s.%N\"";
cmd | getline dt;
close(cmd);
return dt;
}
function timeDiff(t0, t1, s0, n0, s1, n1) {
tmp = $0;
$0 = t0;
sub(/\./, " ");
s0 = int($1);
n0 = int($2);
$0 = t1;
sub(/\./, " ");
s1 = int($1);
n1 = int($2);
if (n1 < n0) {
s1--;
n1 += 1000000000;
}
$0 = tmp;
return sprintf("%d.%09d", s1 - s0, n1 - n0);
}
BEGIN { start = getTimestamp(); }
/^===/ {
re = "^dt_(" substr(pids, 2) ")_";
next;
}
!re {
pids = pids "|" int($1);
next;
}
$1 !~ /^dt_[0-9]/ { next; }
$1 ~ re { next; }
{ sub(/:/, "/"); }
{
if (/_(raw)?fbt_/)
kpv[kpc++] = $0;
else
upv[upc++] = $0;
}
END {
for (i = 0; i < kpc; i++) {
print "Orphaned kprobe "kpv[i];
print "-:"kpv[i] >> kfn;
if (i % 20 == 19)
close(kfn);
}
close(kfn);
for (i = 0; i < upc; i++) {
print "Orphaned uprobe "upv[i];
print "-:"upv[i] >> ufn;
if (i % 20 == 19)
close(ufn);
}
close(ufn);
diff = timeDiff(start, getTimestamp());
txt = sprintf(" (%d kprobes, %d uprobes)", kpc, upc);
print "Cleaning took " diff txt;
}'
exit 0
|
