Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1check_filter_file() { # check filter file introduced by dynamic ftrace
2 if [ ! -f "$1" ]; then
3 echo "$1 not found? Is dynamic ftrace not set?"
4 exit_unsupported
5 fi
6}
7
8clear_trace() { # reset trace output
9 echo > trace
10}
11
12disable_tracing() { # stop trace recording
13 echo 0 > tracing_on
14}
15
16enable_tracing() { # start trace recording
17 echo 1 > tracing_on
18}
19
20reset_tracer() { # reset the current tracer
21 echo nop > current_tracer
22}
23
24reset_trigger_file() {
25 # remove action triggers first
26 grep -H ':on[^:]*(' $@ |
27 while read line; do
28 cmd=`echo $line | cut -f2- -d: | cut -f1 -d"["`
29 file=`echo $line | cut -f1 -d:`
30 echo "!$cmd" >> $file
31 done
32 grep -Hv ^# $@ |
33 while read line; do
34 cmd=`echo $line | cut -f2- -d: | cut -f1 -d"["`
35 file=`echo $line | cut -f1 -d:`
36 echo "!$cmd" > $file
37 done
38}
39
40reset_trigger() { # reset all current setting triggers
41 if [ -d events/synthetic ]; then
42 reset_trigger_file events/synthetic/*/trigger
43 fi
44 reset_trigger_file events/*/*/trigger
45}
46
47reset_events_filter() { # reset all current setting filters
48 grep -v ^none events/*/*/filter |
49 while read line; do
50 echo 0 > `echo $line | cut -f1 -d:`
51 done
52}
53
54reset_ftrace_filter() { # reset all triggers in set_ftrace_filter
55 if [ ! -f set_ftrace_filter ]; then
56 return 0
57 fi
58 echo > set_ftrace_filter
59 grep -v '^#' set_ftrace_filter | while read t; do
60 tr=`echo $t | cut -d: -f2`
61 if [ "$tr" = "" ]; then
62 continue
63 fi
64 if ! grep -q "$t" set_ftrace_filter; then
65 continue;
66 fi
67 name=`echo $t | cut -d: -f1 | cut -d' ' -f1`
68 if [ $tr = "enable_event" -o $tr = "disable_event" ]; then
69 tr=`echo $t | cut -d: -f2-4`
70 limit=`echo $t | cut -d: -f5`
71 else
72 tr=`echo $t | cut -d: -f2`
73 limit=`echo $t | cut -d: -f3`
74 fi
75 if [ "$limit" != "unlimited" ]; then
76 tr="$tr:$limit"
77 fi
78 echo "!$name:$tr" > set_ftrace_filter
79 done
80}
81
82disable_events() {
83 echo 0 > events/enable
84}
85
86clear_synthetic_events() { # reset all current synthetic events
87 grep -v ^# synthetic_events |
88 while read line; do
89 echo "!$line" >> synthetic_events
90 done
91}
92
93initialize_ftrace() { # Reset ftrace to initial-state
94# As the initial state, ftrace will be set to nop tracer,
95# no events, no triggers, no filters, no function filters,
96# no probes, and tracing on.
97 disable_tracing
98 reset_tracer
99 reset_trigger
100 reset_events_filter
101 reset_ftrace_filter
102 disable_events
103 [ -f set_event_pid ] && echo > set_event_pid
104 [ -f set_ftrace_pid ] && echo > set_ftrace_pid
105 [ -f set_ftrace_notrace ] && echo > set_ftrace_notrace
106 [ -f set_graph_function ] && echo | tee set_graph_*
107 [ -f stack_trace_filter ] && echo > stack_trace_filter
108 [ -f kprobe_events ] && echo > kprobe_events
109 [ -f uprobe_events ] && echo > uprobe_events
110 [ -f synthetic_events ] && echo > synthetic_events
111 [ -f snapshot ] && echo 0 > snapshot
112 clear_trace
113 enable_tracing
114}
115
116LOCALHOST=127.0.0.1
117
118yield() {
119 ping $LOCALHOST -c 1 || sleep .001 || usleep 1 || sleep 1
120}
121
122ftrace_errlog_check() { # err-prefix command-with-error-pos-by-^ command-file
123 pos=$(echo -n "${2%^*}" | wc -c) # error position
124 command=$(echo "$2" | tr -d ^)
125 echo "Test command: $command"
126 echo > error_log
127 (! echo "$command" >> "$3" ) 2> /dev/null
128 grep "$1: error:" -A 3 error_log
129 N=$(tail -n 1 error_log | wc -c)
130 # " Command: " and "^\n" => 13
131 test $(expr 13 + $pos) -eq $N
132}