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