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 disable_tracing
  13 clear_trace
  14
  15 ftrace_filter_check() { # glob grep
  16   echo "$1" > set_ftrace_filter
  17   cut -f1 -d" " set_ftrace_filter > $TMPDIR/actual
  18   cut -f1 -d" " available_filter_functions | grep "$2" > $TMPDIR/expected
  19   DIFF=`diff $TMPDIR/actual $TMPDIR/expected`
  20   test -z "$DIFF"
  21 }
  22
  23 # filter by *, front match
  24 ftrace_filter_check '*schedule' '^.*schedule$'
  25
  26 # filter by *, middle match
  27 ftrace_filter_check '*schedule*' '^.*schedule.*$'
  28
  29 # filter by *, end match
  30 ftrace_filter_check 'schedule*' '^schedule.*$'
  31
  32 # Advanced full-glob matching feature is recently supported.
  33 # Skip the tests if we are sure the kernel does not support it.
  34 if grep -q 'accepts: .* glob-matching-pattern' README ; then
  35
  36 # filter by *, both side match
  37 ftrace_filter_check 'sch*ule' '^sch.*ule$'
  38
  39 # filter by char class.
  40 ftrace_filter_check '[Ss]y[Ss]_*' '^[Ss]y[Ss]_.*$'
  41
  42 # filter by ?, schedule is always good
  43 if ! echo "sch?dule" > set_ftrace_filter; then
  44     # test for powerpc 64
  45     if ! echo ".sch?dule" > set_ftrace_filter; then
  46         fail "can not enable schedule filter"
  47     fi
  48     cat set_ftrace_filter | grep '^.schedule$'
  49 else
  50     cat set_ftrace_filter | grep '^schedule$'
  51 fi
  52
  53 fi
  54
  55 echo > set_ftrace_filter
  56 enable_tracing