#!/bin/sh
|
# Use vfs_getname probe to get syscall args filenames
|
|
# Uses the 'perf test shell' library to add probe:vfs_getname to the system
|
# then use it with 'perf record' using 'touch' to write to a temp file, then
|
# checks that that was captured by the vfs_getname probe in the generated
|
# perf.data file, with the temp file name as the pathname argument.
|
|
# SPDX-License-Identifier: GPL-2.0
|
# Arnaldo Carvalho de Melo <acme@kernel.org>, 2017
|
|
. $(dirname $0)/lib/probe.sh
|
|
skip_if_no_perf_probe || exit 2
|
|
. $(dirname $0)/lib/probe_vfs_getname.sh
|
|
perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
|
file=$(mktemp /tmp/temporary_file.XXXXX)
|
|
record_open_file() {
|
echo "Recording open file:"
|
perf record -o ${perfdata} -e probe:vfs_getname\* touch $file
|
}
|
|
perf_script_filenames() {
|
echo "Looking at perf.data file for vfs_getname records for the file we touched:"
|
perf script -i ${perfdata} | \
|
egrep " +touch +[0-9]+ +\[[0-9]+\] +[0-9]+\.[0-9]+: +probe:vfs_getname[_0-9]*: +\([[:xdigit:]]+\) +pathname=\"${file}\""
|
}
|
|
add_probe_vfs_getname || skip_if_no_debuginfo
|
err=$?
|
if [ $err -ne 0 ] ; then
|
exit $err
|
fi
|
|
record_open_file && perf_script_filenames
|
err=$?
|
rm -f ${perfdata}
|
rm -f ${file}
|
cleanup_probe_vfs_getname
|
exit $err
|
