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.*$'
  31
  32 # filter by *mid*end
  33 ftrace_filter_check '*aw*lock' '.*aw.*lock$'
  34
  35 # filter by start*mid*
  36 ftrace_filter_check 'mutex*try*' '^mutex.*try.*'
  37
  38 # Advanced full-glob matching feature is recently supported.
  39 # Skip the tests if we are sure the kernel does not support it.
  40 if grep -q 'accepts: .* glob-matching-pattern' README ; then
  41
  42 # filter by *, both side match
  43 ftrace_filter_check 'sch*ule' '^sch.*ule$'
  44
  45 # filter by char class.
  46 ftrace_filter_check '[Ss]y[Ss]_*' '^[Ss]y[Ss]_.*$'
  47
  48 # filter by ?, schedule is always good
  49 if ! echo "sch?dule" > set_ftrace_filter; then
  50     # test for powerpc 64
  51     if ! echo ".sch?dule" > set_ftrace_filter; then
  52         fail "can not enable schedule filter"
  53     fi
  54     cat set_ftrace_filter | grep '^.schedule$'
  55 else
  56     cat set_ftrace_filter | grep '^schedule$'
  57 fi
  58
  59 fi
  60
  61 echo > set_ftrace_filter
  62 enable_tracing