tools/testing/selftests/ftrace/test.d/ftrace/func-filter-glob.tc

   1 #!/bin/sh
   2 # description: ftrace - function glob filters
   3
   4 # Make sure that function glob matching filter works.
   5
   6 if ! grep -q function available_tracers; then
   7     echo "no function tracer configured"
   8     exit_unsupported
   9 fi
  10
  11 disable_tracing
  12 clear_trace
  13
  14 ftrace_filter_check() { # glob grep
  15   echo "$1" > set_ftrace_filter
  16   cut -f1 -d" " set_ftrace_filter > $TMPDIR/actual
  17   cut -f1 -d" " available_filter_functions | grep "$2" > $TMPDIR/expected
  18   DIFF=`diff $TMPDIR/actual $TMPDIR/expected`
  19   test -z "$DIFF"
  20 }
  21
  22 # filter by *, front match
  23 ftrace_filter_check '*schedule' '^.*schedule$'
  24
  25 # filter by *, middle match
  26 ftrace_filter_check '*schedule*' '^.*schedule.*$'
  27
  28 # filter by *, end match
  29 ftrace_filter_check 'schedule*' '^schedule.*$'
  30
  31 # Advanced full-glob matching feature is recently supported.
  32 # Skip the tests if we are sure the kernel does not support it.
  33 if grep -q 'accepts: .* glob-matching-pattern' README ; then
  34
  35 # filter by *, both side match
  36 ftrace_filter_check 'sch*ule' '^sch.*ule$'
  37
  38 # filter by char class.
  39 ftrace_filter_check '[Ss]y[Ss]_*' '^[Ss]y[Ss]_.*$'
  40
  41 # filter by ?, schedule is always good
  42 if ! echo "sch?dule" > set_ftrace_filter; then
  43     # test for powerpc 64
  44     if ! echo ".sch?dule" > set_ftrace_filter; then
  45         fail "can not enable schedule filter"
  46     fi
  47     cat set_ftrace_filter | grep '^.schedule$'
  48 else
  49     cat set_ftrace_filter | grep '^schedule$'
  50 fi
  51
  52 fi
  53
  54 echo > set_ftrace_filter
  55 enable_tracing