aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/tools/testing/selftests/ftrace/test.d/functions
blob: c5dec55b7d95d266ad159477fc4692151da11766 (plain) (blame)
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
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
}

check_requires() { # Check required files and tracers
    for i in "$@" ; do
        r=${i%:README}
        t=${i%:tracer}
        if [ $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
}

# 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
}