tools/testing/selftests/ftrace/test.d/kprobe/kprobe_eventname.tc

   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