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

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 # description: Register/unregister many kprobe events
   4
   5 [ -f kprobe_events ] || exit_unsupported # this is configurable
   6
   7 # ftrace fentry skip size depends on the machine architecture.
   8 # Currently HAVE_KPROBES_ON_FTRACE defined on x86 and powerpc64le
   9 case `uname -m` in
  10   x86_64|i[3456]86) OFFS=5;;
  11   ppc64le) OFFS=8;;
  12   *) OFFS=0;;
  13 esac
  14
  15 if [ -d events/kprobes ]; then
  16   echo 0 > events/kprobes/enable
  17   echo > kprobe_events
  18 fi
  19
  20 N=0
  21 echo "Setup up kprobes on first available 256 text symbols"
  22 grep -i " t " /proc/kallsyms | cut -f3 -d" " | grep -v .*\\..* | \
  23 while read i; do
  24   echo p ${i}+${OFFS} >> kprobe_events && N=$((N+1)) ||:
  25   test $N -eq 256 && break
  26 done
  27
  28 L=`wc -l kprobe_events`
  29 if [ $L -ne $N ]; then
  30   echo "The number of kprobes events ($L) is not $N"
  31   exit_fail
  32 fi
  33
  34 echo 1 > events/kprobes/enable
  35 echo 0 > events/kprobes/enable
  36 echo > kprobe_events
  37 echo "Waiting for unoptimizing & freeing"
  38 sleep 5
  39 echo "Done"