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
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
|
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
}
clear_dynamic_events() { # reset all current dynamic events
again=1
stop=1
# loop mulitple times as some events require other to be removed first
while [ $again -eq 1 ]; do
stop=$((stop+1))
# Prevent infinite loops
if [ $stop -gt 10 ]; then
break;
fi
again=2
grep -v '^#' dynamic_events|
while read line; do
del=`echo $line | sed -e 's/^.\([^ ]*\).*/-\1/'`
if ! echo "$del" >> dynamic_events; then
again=1
fi
done
done
}
initialize_ftrace() { # Reset ftrace to initial-state
# As the initial state, ftrace will be set to nop tracer,
# no events, no triggers, no filters, no function filters,
# no probes, and tracing on.
disable_tracing
reset_tracer
reset_trigger
reset_events_filter
reset_ftrace_filter
disable_events
clear_dynamic_events
[ -f set_event_pid ] && echo > set_event_pid
[ -f set_ftrace_pid ] && echo > set_ftrace_pid
[ -f set_ftrace_notrace ] && echo > set_ftrace_notrace
[ -f set_graph_function ] && echo | tee set_graph_*
[ -f stack_trace_filter ] && echo > stack_trace_filter
[ -f kprobe_events ] && echo > kprobe_events
[ -f uprobe_events ] && echo > uprobe_events
[ -f synthetic_events ] && echo > synthetic_events
[ -f snapshot ] && echo 0 > snapshot
# Stop tracing while reading the trace file by default, to prevent
# the test results while checking it and to avoid taking a long time
# to check the result.
[ -f options/pause-on-trace ] && echo 1 > options/pause-on-trace
clear_trace
enable_tracing
}
finish_ftrace() {
initialize_ftrace
# And recover it to default.
[ -f options/pause-on-trace ] && echo 0 > options/pause-on-trace
}
check_requires() { # Check required files and tracers
for i in "$@" ; do
p=${i%:program}
r=${i%:README}
t=${i%:tracer}
if [ $p != $i ]; then
if ! which $p ; then
echo "Required program $p is not found."
exit_unresolved
fi
elif [ $t != $i ]; then
if ! grep -wq $t available_tracers ; then
echo "Required tracer $t is not configured."
exit_unsupported
fi
elif [ "$r" != "$i" ]; then
if ! grep -Fq "$r" README ; then
echo "Required feature pattern \"$r\" is not in README."
exit_unsupported
fi
elif [ ! -e $i ]; then
echo "Required feature interface $i doesn't exist."
exit_unsupported
fi
done
}
LOCALHOST=127.0.0.1
yield() {
ping $LOCALHOST -c 1 || sleep .001 || usleep 1 || sleep 1
}
# The fork function in the kernel was renamed from "_do_fork" to
# "kernel_fork". As older tests should still work with older kernels
# as well as newer kernels, check which version of fork is used on this
# kernel so that the tests can use the fork function for the running kernel.
FUNCTION_FORK=`(if grep '\bkernel_clone\b' /proc/kallsyms > /dev/null; then
echo kernel_clone; else echo '_do_fork'; fi)`
# Since probe event command may include backslash, explicitly use printf "%s"
# to NOT interpret it.
ftrace_errlog_check() { # err-prefix command-with-error-pos-by-^ command-file
pos=$(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 $N
}
# Helper to get the tracefs mount point
get_mount_point() {
local mount_point=`stat -c '%m' .`
# If stat -c '%m' does not work (e.g. busybox) or failed, try to use the
# current working directory (which should be a tracefs) as the mount point.
if [ ! -d "$mount_point" ]; then
if mount | grep -qw "$PWD"; then
mount_point=$PWD
else
# If PWD doesn't work, that is an environmental problem.
exit_unresolved
fi
fi
echo "$mount_point"
}
# Helper function to retrieve mount options for a given mount point
get_mnt_options() {
local mnt_point="$1"
local opts=$(mount | grep -m1 "$mnt_point" | sed -e 's/.*(\(.*\)).*/\1/')
echo "$opts"
}
|
