1 #!/bin/sh
2 # SPDX-License-Identifier: GPL-2.0
3 # description: Kprobe event auto/manual naming
4 # requires: kprobe_events
5
6 :;: "Add an event on function without name" ;:
7
8 FUNC=`grep " [tT] .*vfs_read$" /proc/kallsyms | tail -n 1 | cut -f 3 -d " "`
9 [ "x" != "x$FUNC" ] || exit_unresolved
10 echo "p $FUNC" > kprobe_events
11 PROBE_NAME=`echo $FUNC | tr ".:" "_"`
12 test -d events/kprobes/p_${PROBE_NAME}_0 || exit_failure
13
14 :;: "Add an event on function with new name" ;:
15
16 echo "p:event1 $FUNC" > kprobe_events
17 test -d events/kprobes/event1 || exit_failure
18
19 :;: "Add an event on function with new name and group" ;:
20
21 echo "p:kprobes2/event2 $FUNC" > kprobe_events
22 test -d events/kprobes2/event2 || exit_failure
23
24 :;: "Add an event on dot function without name" ;:
25
26 find_dot_func() {
27 if [ ! -f available_filter_functions ]; then
28 grep -m 10 " [tT] .*\.isra\..*$" /proc/kallsyms | tail -n 1 | cut -f 3 -d " "
29 return;
30 fi
31
32 grep " [tT] .*\.isra\..*" /proc/kallsyms | cut -f 3 -d " " | while read f; do
33 cnt=`grep -s $f available_filter_functions | wc -l`;
34 if [ $cnt -eq 1 ]; then
35 echo $f
36 break
37 fi
38 done
39 }
40
41 FUNC=`find_dot_func | tail -n 1`
42 [ "x" != "x$FUNC" ] || exit_unresolved
43 echo "p $FUNC" > kprobe_events
44 EVENT=`grep $FUNC kprobe_events | cut -f 1 -d " " | cut -f 2 -d:`
45 [ "x" != "x$EVENT" ] || exit_failure
46 test -d events/$EVENT || exit_failure
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