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
7if ! grep -q function available_tracers; then
8    echo "no function tracer configured"
9    exit_unsupported
10fi
11
12disable_tracing
13clear_trace
14
15ftrace_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
24ftrace_filter_check '*schedule' '^.*schedule$'
25
26# filter by *, middle match
27ftrace_filter_check '*schedule*' '^.*schedule.*$'
28
29# filter by *, end match
30ftrace_filter_check 'schedule*' '^schedule.*$'
31
32# filter by *mid*end
33ftrace_filter_check '*aw*lock' '.*aw.*lock$'
34
35# filter by start*mid*
36ftrace_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.
40if grep -q 'accepts: .* glob-matching-pattern' README ; then
41
42# filter by *, both side match
43ftrace_filter_check 'sch*ule' '^sch.*ule$'
44
45# filter by char class.
46ftrace_filter_check '[Ss]y[Ss]_*' '^[Ss]y[Ss]_.*$'
47
48# filter by ?, schedule is always good
49if ! 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$'
55else
56    cat set_ftrace_filter | grep '^schedule$'
57fi
58
59fi
60
61echo > set_ftrace_filter
62enable_tracing
63