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

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 # description: ftrace - function glob filters
   4
   5 # Make sure that function glob matching filter works.
   6
   7 if ! grep -q function available_tracers; then
   8     echo "no function tracer configured"
   9     exit_unsupported
  10 fi
  11
  12 check_filter_file set_ftrace_filter
  13
  14 disable_tracing
  15 clear_trace
  16
  17 ftrace_filter_check() { # glob grep
  18   echo "$1" > set_ftrace_filter
  19   cut -f1 -d" " set_ftrace_filter > $TMPDIR/actual
  20   cut -f1 -d" " available_filter_functions | grep "$2" > $TMPDIR/expected
  21   DIFF=`diff $TMPDIR/actual $TMPDIR/expected`
  22   test -z "$DIFF"
  23 }
  24
  25 # filter by *, front match
  26 ftrace_filter_check '*schedule' '^.*schedule$'
  27
  28 # filter by *, middle match
  29 ftrace_filter_check '*schedule*' '^.*schedule.*$'
  30
  31 # filter by *, end match
  32 ftrace_filter_check 'schedule*' '^schedule.*$'
  33
  34 # filter by *mid*end
  35 ftrace_filter_check '*pin*lock' '.*pin.*lock$'
  36
  37 # filter by start*mid*
  38 ftrace_filter_check 'mutex*try*' '^mutex.*try.*'
  39
  40 # Advanced full-glob matching feature is recently supported.
  41 # Skip the tests if we are sure the kernel does not support it.
  42 if grep -q 'accepts: .* glob-matching-pattern' README ; then
  43
  44 # filter by *, both side match
  45 ftrace_filter_check 'sch*ule' '^sch.*ule$'
  46
  47 # filter by char class.
  48 ftrace_filter_check '[Ss]y[Ss]_*' '^[Ss]y[Ss]_.*$'
  49
  50 # filter by ?, schedule is always good
  51 if ! echo "sch?dule" > set_ftrace_filter; then
  52     # test for powerpc 64
  53     if ! echo ".sch?dule" > set_ftrace_filter; then
  54         fail "can not enable schedule filter"
  55     fi
  56     cat set_ftrace_filter | grep '^.schedule$'
  57 else
  58     cat set_ftrace_filter | grep '^schedule$'
  59 fi
  60
  61 fi
  62
  63 echo > set_ftrace_filter
  64 enable_tracing