Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1clear_trace() { # reset trace output
2 echo > trace
3}
4
5disable_tracing() { # stop trace recording
6 echo 0 > tracing_on
7}
8
9enable_tracing() { # start trace recording
10 echo 1 > tracing_on
11}
12
13reset_tracer() { # reset the current tracer
14 echo nop > current_tracer
15}
16
17reset_trigger_file() {
18 # remove action triggers first
19 grep -H ':on[^:]*(' $@ |
20 while read line; do
21 cmd=`echo $line | cut -f2- -d: | cut -f1 -d"["`
22 file=`echo $line | cut -f1 -d:`
23 echo "!$cmd" >> $file
24 done
25 grep -Hv ^# $@ |
26 while read line; do
27 cmd=`echo $line | cut -f2- -d: | cut -f1 -d"["`
28 file=`echo $line | cut -f1 -d:`
29 echo "!$cmd" > $file
30 done
31}
32
33reset_trigger() { # reset all current setting triggers
34 if [ -d events/synthetic ]; then
35 reset_trigger_file events/synthetic/*/trigger
36 fi
37 reset_trigger_file events/*/*/trigger
38}
39
40reset_events_filter() { # reset all current setting filters
41 grep -v ^none events/*/*/filter |
42 while read line; do
43 echo 0 > `echo $line | cut -f1 -d:`
44 done
45}
46
47reset_ftrace_filter() { # reset all triggers in set_ftrace_filter
48 if [ ! -f set_ftrace_filter ]; then
49 return 0
50 fi
51 echo > set_ftrace_filter
52 grep -v '^#' set_ftrace_filter | while read t; do
53 tr=`echo $t | cut -d: -f2`
54 if [ "$tr" = "" ]; then
55 continue
56 fi
57 if ! grep -q "$t" set_ftrace_filter; then
58 continue;
59 fi
60 name=`echo $t | cut -d: -f1 | cut -d' ' -f1`
61 if [ $tr = "enable_event" -o $tr = "disable_event" ]; then
62 tr=`echo $t | cut -d: -f2-4`
63 limit=`echo $t | cut -d: -f5`
64 else
65 tr=`echo $t | cut -d: -f2`
66 limit=`echo $t | cut -d: -f3`
67 fi
68 if [ "$limit" != "unlimited" ]; then
69 tr="$tr:$limit"
70 fi
71 echo "!$name:$tr" > set_ftrace_filter
72 done
73}
74
75disable_events() {
76 echo 0 > events/enable
77}
78
79clear_synthetic_events() { # reset all current synthetic events
80 grep -v ^# synthetic_events |
81 while read line; do
82 echo "!$line" >> synthetic_events
83 done
84}
85
86initialize_ftrace() { # Reset ftrace to initial-state
87# As the initial state, ftrace will be set to nop tracer,
88# no events, no triggers, no filters, no function filters,
89# no probes, and tracing on.
90 disable_tracing
91 reset_tracer
92 reset_trigger
93 reset_events_filter
94 reset_ftrace_filter
95 disable_events
96 [ -f set_event_pid ] && echo > set_event_pid
97 [ -f set_ftrace_pid ] && echo > set_ftrace_pid
98 [ -f set_ftrace_notrace ] && echo > set_ftrace_notrace
99 [ -f set_graph_function ] && echo | tee set_graph_*
100 [ -f stack_trace_filter ] && echo > stack_trace_filter
101 [ -f kprobe_events ] && echo > kprobe_events
102 [ -f uprobe_events ] && echo > uprobe_events
103 [ -f synthetic_events ] && echo > synthetic_events
104 [ -f snapshot ] && echo 0 > snapshot
105 clear_trace
106 enable_tracing
107}
108
109check_requires() { # Check required files and tracers
110 for i in "$@" ; do
111 r=${i%:README}
112 t=${i%:tracer}
113 if [ $t != $i ]; then
114 if ! grep -wq $t available_tracers ; then
115 echo "Required tracer $t is not configured."
116 exit_unsupported
117 fi
118 elif [ $r != $i ]; then
119 if ! grep -Fq "$r" README ; then
120 echo "Required feature pattern \"$r\" is not in README."
121 exit_unsupported
122 fi
123 elif [ ! -e $i ]; then
124 echo "Required feature interface $i doesn't exist."
125 exit_unsupported
126 fi
127 done
128}
129
130LOCALHOST=127.0.0.1
131
132yield() {
133 ping $LOCALHOST -c 1 || sleep .001 || usleep 1 || sleep 1
134}
135
136# The fork function in the kernel was renamed from "_do_fork" to
137# "kernel_fork". As older tests should still work with older kernels
138# as well as newer kernels, check which version of fork is used on this
139# kernel so that the tests can use the fork function for the running kernel.
140FUNCTION_FORK=`(if grep '\bkernel_clone\b' /proc/kallsyms > /dev/null; then
141 echo kernel_clone; else echo '_do_fork'; fi)`
142
143# Since probe event command may include backslash, explicitly use printf "%s"
144# to NOT interpret it.
145ftrace_errlog_check() { # err-prefix command-with-error-pos-by-^ command-file
146 pos=$(printf "%s" "${2%^*}" | wc -c) # error position
147 command=$(printf "%s" "$2" | tr -d ^)
148 echo "Test command: $command"
149 echo > error_log
150 (! printf "%s" "$command" >> "$3" ) 2> /dev/null
151 grep "$1: error:" -A 3 error_log
152 N=$(tail -n 1 error_log | wc -c)
153 # " Command: " and "^\n" => 13
154 test $(expr 13 + $pos) -eq $N
155}