blob: 697c77ef2e2bf0aab7a7abdb470cccf1c3b1da3c (
plain)
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
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
check_filter_file() { # check filter file introduced by dynamic ftrace
if [ ! -f "$1" ]; then
echo "$1 not found? Is dynamic ftrace not set?"
exit_unsupported
fi
}
clear_trace() { # reset trace output
echo > trace
}
disable_tracing() { # stop trace recording
echo 0 > tracing_on
}
enable_tracing() { # start trace recording
echo 1 > tracing_on
}
reset_tracer() { # reset the current tracer
echo nop > current_tracer
}
reset_trigger_file() {
# remove action triggers first
grep -H ':on[^:]*(' $@ |
while read line; do
cmd=`echo $line | cut -f2- -d: | cut -f1 -d"["`
file=`echo $line | cut -f1 -d:`
echo "!$cmd" >> $file
done
grep -Hv ^# $@ |
while read line; do
cmd=`echo $line | cut -f2- -d: | cut -f1 -d"["`
file=`echo $line | cut -f1 -d:`
echo "!$cmd" > $file
done
}
reset_trigger() { # reset all current setting triggers
if [ -d events/synthetic ]; then
reset_trigger_file events/synthetic/*/trigger
fi
reset_trigger_file events/*/*/trigger
}
reset_events_filter() { # reset all current setting filters
grep -v ^none events/*/*/filter |
while read line; do
echo 0 > `echo $line | cut -f1 -d:`
done
}
reset_ftrace_filter() { # reset all triggers in set_ftrace_filter
if [ ! -f set_ftrace_filter ]; then
return 0
fi
echo > set_ftrace_filter
grep -v '^#' set_ftrace_filter | while read t; do
tr=`echo $t | cut -d: -f2`
if [ "$tr" = "" ]; then
continue
fi
if ! grep -q "$t" set_ftrace_filter; then
continue;
fi
name=`echo $t | cut -d: -f1 | cut -d' ' -f1`
if [ $tr = "enable_event" -o $tr = "disable_event" ]; then
tr=`echo $t | cut -d: -f2-4`
limit=`echo $t | cut -d: -f5`
else
tr=`echo $t | cut -d: -f2`
limit=`echo $t | cut -d: -f3`
fi
if [ "$limit" != "unlimited" ]; then
tr="$tr:$limit"
fi
echo "!$name:$tr" > set_ftrace_filter
done
}
disable_events() {
echo 0 > events/enable
}
clear_synthetic_events() { # reset all current synthetic events
grep -v ^# synthetic_events |
while read line; do
echo "!$line" >> synthetic_events
done
}
initialize_ftrace() { # Reset ftrace to initial-state
# As the initial state, ftrace will be set to nop tracer,
# no events, no triggers, no filters, no function filters,
# no probes, and tracing on.
disable_tracing
reset_tracer
reset_trigger
reset_events_filter
reset_ftrace_filter
disable_events
[ -f set_event_pid ] && echo > set_event_pid
[ -f set_ftrace_pid ] && echo > set_ftrace_pid
[ -f set_ftrace_notrace ] && echo > set_ftrace_notrace
[ -f set_graph_function ] && echo | tee set_graph_*
[ -f stack_trace_filter ] && echo > stack_trace_filter
[ -f kprobe_events ] && echo > kprobe_events
[ -f uprobe_events ] && echo > uprobe_events
[ -f synthetic_events ] && echo > synthetic_events
[ -f snapshot ] && echo 0 > snapshot
clear_trace
enable_tracing
}
LOCALHOST=127.0.0.1
yield() {
ping $LOCALHOST -c 1 || sleep .001 || usleep 1 || sleep 1
}
# Since probe event command may include backslash, explicitly use printf "%s"
# to NOT interpret it.
ftrace_errlog_check() { # err-prefix command-with-error-pos-by-^ command-file
pos=$(printf "%s" "${2%^*}" | wc -c) # error position
command=$(printf "%s" "$2" | tr -d ^)
echo "Test command: $command"
echo > error_log
(! printf "%s" "$command" >> "$3" ) 2> /dev/null
grep "$1: error:" -A 3 error_log
N=$(tail -n 1 error_log | wc -c)
# " Command: " and "^\n" => 13
test $(expr 13 + $pos) -eq $N
}
|
