test.d/kprobe/kprobe_eventname.tc

0001 #!/bin/sh
0002 # SPDX-License-Identifier: GPL-2.0
0003 # description: Kprobe event auto/manual naming
0004 # requires: kprobe_events
0005
0006 :;: "Add an event on function without name" ;:
0007
0008 FUNC=`grep " [tT] .*vfs_read$" /proc/kallsyms | tail -n 1 | cut -f 3 -d " "`
0009 [ "x" != "x$FUNC" ] || exit_unresolved
0010 echo "p $FUNC" > kprobe_events
0011 PROBE_NAME=`echo $FUNC | tr ".:" "_"`
0012 test -d events/kprobes/p_${PROBE_NAME}_0 || exit_failure
0013
0014 :;: "Add an event on function with new name" ;:
0015
0016 echo "p:event1 $FUNC" > kprobe_events
0017 test -d events/kprobes/event1 || exit_failure
0018
0019 :;: "Add an event on function with new name and group" ;:
0020
0021 echo "p:kprobes2/event2 $FUNC" > kprobe_events
0022 test -d events/kprobes2/event2 || exit_failure
0023
0024 :;: "Add an event on dot function without name" ;:
0025
0026 find_dot_func() {
0027         if [ ! -f available_filter_functions ]; then
0028                 grep -m 10 " [tT] .*\.isra\..*$" /proc/kallsyms | tail -n 1 | cut -f 3 -d " "
0029                 return;
0030         fi
0031
0032         grep " [tT] .*\.isra\..*" /proc/kallsyms | cut -f 3 -d " " | while read f; do
0033                 if grep -s $f available_filter_functions; then
0034                         echo $f
0035                         break
0036                 fi
0037         done
0038 }
0039
0040 FUNC=`find_dot_func | tail -n 1`
0041 [ "x" != "x$FUNC" ] || exit_unresolved
0042 echo "p $FUNC" > kprobe_events
0043 EVENT=`grep $FUNC kprobe_events | cut -f 1 -d " " | cut -f 2 -d:`
0044 [ "x" != "x$EVENT" ] || exit_failure
0045 test -d events/$EVENT || exit_failure