Commit | Line | Data |
---|---|---|
5675fd4e MH |
1 | # SPDX-License-Identifier: GPL-2.0-only |
2 | ||
3 | clear_trace() { # reset trace output | |
4 | echo > trace | |
5 | } | |
6 | ||
7 | disable_tracing() { # stop trace recording | |
8 | echo 0 > tracing_on | |
9 | } | |
10 | ||
11 | enable_tracing() { # start trace recording | |
12 | echo 1 > tracing_on | |
13 | } | |
14 | ||
15 | reset_tracer() { # reset the current tracer | |
16 | echo nop > current_tracer | |
17 | } | |
18 | ||
19 | reset_trigger_file() { | |
20 | # remove action triggers first | |
21 | grep -H ':on[^:]*(' $@ | | |
22 | while read line; do | |
23 | cmd=`echo $line | cut -f2- -d: | cut -f1 -d"["` | |
24 | file=`echo $line | cut -f1 -d:` | |
25 | echo "!$cmd" >> $file | |
26 | done | |
27 | grep -Hv ^# $@ | | |
28 | while read line; do | |
29 | cmd=`echo $line | cut -f2- -d: | cut -f1 -d"["` | |
30 | file=`echo $line | cut -f1 -d:` | |
31 | echo "!$cmd" > $file | |
32 | done | |
33 | } | |
34 | ||
35 | reset_trigger() { # reset all current setting triggers | |
36 | if [ -d events/synthetic ]; then | |
37 | reset_trigger_file events/synthetic/*/trigger | |
38 | fi | |
39 | reset_trigger_file events/*/*/trigger | |
40 | } | |
41 | ||
42 | reset_events_filter() { # reset all current setting filters | |
43 | grep -v ^none events/*/*/filter | | |
44 | while read line; do | |
45 | echo 0 > `echo $line | cut -f1 -d:` | |
46 | done | |
47 | } | |
48 | ||
49 | reset_ftrace_filter() { # reset all triggers in set_ftrace_filter | |
50 | if [ ! -f set_ftrace_filter ]; then | |
51 | return 0 | |
52 | fi | |
53 | echo > set_ftrace_filter | |
54 | grep -v '^#' set_ftrace_filter | while read t; do | |
55 | tr=`echo $t | cut -d: -f2` | |
56 | if [ "$tr" = "" ]; then | |
57 | continue | |
58 | fi | |
59 | if ! grep -q "$t" set_ftrace_filter; then | |
60 | continue; | |
61 | fi | |
62 | name=`echo $t | cut -d: -f1 | cut -d' ' -f1` | |
63 | if [ $tr = "enable_event" -o $tr = "disable_event" ]; then | |
64 | tr=`echo $t | cut -d: -f2-4` | |
65 | limit=`echo $t | cut -d: -f5` | |
66 | else | |
67 | tr=`echo $t | cut -d: -f2` | |
68 | limit=`echo $t | cut -d: -f3` | |
69 | fi | |
70 | if [ "$limit" != "unlimited" ]; then | |
71 | tr="$tr:$limit" | |
72 | fi | |
73 | echo "!$name:$tr" > set_ftrace_filter | |
74 | done | |
75 | } | |
76 | ||
77 | disable_events() { | |
78 | echo 0 > events/enable | |
79 | } | |
80 | ||
81 | clear_synthetic_events() { # reset all current synthetic events | |
82 | grep -v ^# synthetic_events | | |
83 | while read line; do | |
84 | echo "!$line" >> synthetic_events | |
85 | done | |
86 | } | |
87 | ||
88 | initialize_ftrace() { # Reset ftrace to initial-state | |
89 | # As the initial state, ftrace will be set to nop tracer, | |
90 | # no events, no triggers, no filters, no function filters, | |
91 | # no probes, and tracing on. | |
92 | disable_tracing | |
93 | reset_tracer | |
94 | reset_trigger | |
95 | reset_events_filter | |
96 | reset_ftrace_filter | |
97 | disable_events | |
98 | [ -f set_event_pid ] && echo > set_event_pid | |
99 | [ -f set_ftrace_pid ] && echo > set_ftrace_pid | |
100 | [ -f set_ftrace_notrace ] && echo > set_ftrace_notrace | |
101 | [ -f set_graph_function ] && echo | tee set_graph_* | |
102 | [ -f stack_trace_filter ] && echo > stack_trace_filter | |
103 | [ -f kprobe_events ] && echo > kprobe_events | |
104 | [ -f uprobe_events ] && echo > uprobe_events | |
105 | [ -f synthetic_events ] && echo > synthetic_events | |
106 | [ -f snapshot ] && echo 0 > snapshot | |
107 | clear_trace | |
108 | enable_tracing | |
109 | } |