record+script_probe_vfs_getname.sh (1239B)
1#!/bin/sh 2# Use vfs_getname probe to get syscall args filenames 3 4# Uses the 'perf test shell' library to add probe:vfs_getname to the system 5# then use it with 'perf record' using 'touch' to write to a temp file, then 6# checks that that was captured by the vfs_getname probe in the generated 7# perf.data file, with the temp file name as the pathname argument. 8 9# SPDX-License-Identifier: GPL-2.0 10# Arnaldo Carvalho de Melo <acme@kernel.org>, 2017 11 12. $(dirname $0)/lib/probe.sh 13 14skip_if_no_perf_probe || exit 2 15 16. $(dirname $0)/lib/probe_vfs_getname.sh 17 18record_open_file() { 19 echo "Recording open file:" 20 perf record -o ${perfdata} -e probe:vfs_getname\* touch $file 21} 22 23perf_script_filenames() { 24 echo "Looking at perf.data file for vfs_getname records for the file we touched:" 25 perf script -i ${perfdata} | \ 26 egrep " +touch +[0-9]+ +\[[0-9]+\] +[0-9]+\.[0-9]+: +probe:vfs_getname[_0-9]*: +\([[:xdigit:]]+\) +pathname=\"${file}\"" 27} 28 29add_probe_vfs_getname || skip_if_no_debuginfo 30err=$? 31if [ $err -ne 0 ] ; then 32 exit $err 33fi 34 35perfdata=$(mktemp /tmp/__perf_test.perf.data.XXXXX) 36file=$(mktemp /tmp/temporary_file.XXXXX) 37 38record_open_file && perf_script_filenames 39err=$? 40rm -f ${perfdata} 41rm -f ${file} 42cleanup_probe_vfs_getname 43exit $err