tools/testing/selftests/ftrace/test.d/filter/event-filter-function.tc

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 # description: event filter function - test event filtering on functions
   4 # requires: set_event events/kmem/kmem_cache_free/filter
   5 # flags: instance
   6
   7 fail() { #msg
   8     echo $1
   9     exit_fail
  10 }
  11
  12 echo "Test event filter function name"
  13 echo 0 > tracing_on
  14 echo 0 > events/enable
  15 echo > trace
  16 echo 'call_site.function == exit_mmap' > events/kmem/kmem_cache_free/filter
  17 echo 1 > events/kmem/kmem_cache_free/enable
  18 echo 1 > tracing_on
  19 ls > /dev/null
  20 echo 0 > events/kmem/kmem_cache_free/enable
  21
  22 hitcnt=`grep kmem_cache_free trace| grep exit_mmap | wc -l`
  23 misscnt=`grep kmem_cache_free trace| grep -v exit_mmap | wc -l`
  24
  25 if [ $hitcnt -eq 0 ]; then
  26         exit_fail
  27 fi
  28
  29 if [ $misscnt -gt 0 ]; then
  30         exit_fail
  31 fi
  32
  33 address=`grep ' exit_mmap$' /proc/kallsyms | cut -d' ' -f1`
  34
  35 echo "Test event filter function address"
  36 echo 0 > tracing_on
  37 echo 0 > events/enable
  38 echo > trace
  39 echo "call_site.function == 0x$address" > events/kmem/kmem_cache_free/filter
  40 echo 1 > events/kmem/kmem_cache_free/enable
  41 echo 1 > tracing_on
  42 sleep 1
  43 echo 0 > events/kmem/kmem_cache_free/enable
  44
  45 hitcnt=`grep kmem_cache_free trace| grep exit_mmap | wc -l`
  46 misscnt=`grep kmem_cache_free trace| grep -v exit_mmap | wc -l`
  47
  48 if [ $hitcnt -eq 0 ]; then
  49         exit_fail
  50 fi
  51
  52 if [ $misscnt -gt 0 ]; then
  53         exit_fail
  54 fi
  55
  56 reset_events_filter
  57
  58 exit 0