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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# description: ftrace - function glob filters
# Make sure that function glob matching filter works.
if ! grep -q function available_tracers; then
echo "no function tracer configured"
exit_unsupported
fi
check_filter_file set_ftrace_filter
disable_tracing
clear_trace
ftrace_filter_check() { # glob grep
echo "$1" > set_ftrace_filter
cut -f1 -d" " set_ftrace_filter > $TMPDIR/actual
cut -f1 -d" " available_filter_functions | grep "$2" > $TMPDIR/expected
DIFF=`diff $TMPDIR/actual $TMPDIR/expected`
test -z "$DIFF"
}
# filter by *, front match
ftrace_filter_check '*schedule' '^.*schedule$'
# filter by *, middle match
ftrace_filter_check '*schedule*' '^.*schedule.*$'
# filter by *, end match
ftrace_filter_check 'schedule*' '^schedule.*$'
# filter by *mid*end
ftrace_filter_check '*pin*lock' '.*pin.*lock$'
# filter by start*mid*
ftrace_filter_check 'mutex*try*' '^mutex.*try.*'
# Advanced full-glob matching feature is recently supported.
# Skip the tests if we are sure the kernel does not support it.
if grep -q 'accepts: .* glob-matching-pattern' README ; then
# filter by *, both side match
ftrace_filter_check 'sch*ule' '^sch.*ule$'
# filter by char class.
ftrace_filter_check '[Ss]y[Ss]_*' '^[Ss]y[Ss]_.*$'
# filter by ?, schedule is always good
if ! echo "sch?dule" > set_ftrace_filter; then
# test for powerpc 64
if ! echo ".sch?dule" > set_ftrace_filter; then
fail "can not enable schedule filter"
fi
cat set_ftrace_filter | grep '^.schedule$'
else
cat set_ftrace_filter | grep '^schedule$'
fi
fi
echo > set_ftrace_filter
enable_tracing
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