14eaf97e8SMichael Petlan#!/bin/sh 2e498f336SArnaldo Carvalho de Melo# Check open filename arg using perf trace + vfs_getname 3e498f336SArnaldo Carvalho de Melo 4e498f336SArnaldo Carvalho de Melo# Uses the 'perf test shell' library to add probe:vfs_getname to the system 5e498f336SArnaldo Carvalho de Melo# then use it with 'perf trace' using 'touch' to write to a temp file, then 6e498f336SArnaldo Carvalho de Melo# checks that that was captured by the vfs_getname was used by 'perf trace', 7e498f336SArnaldo Carvalho de Melo# that already handles "probe:vfs_getname" if present, and used in the 8e498f336SArnaldo Carvalho de Melo# "open" syscall "filename" argument beautifier. 9e498f336SArnaldo Carvalho de Melo 105875cf4cSArnaldo Carvalho de Melo# SPDX-License-Identifier: GPL-2.0 11e498f336SArnaldo Carvalho de Melo# Arnaldo Carvalho de Melo <acme@kernel.org>, 2017 12e498f336SArnaldo Carvalho de Melo 1338beba67SAkanksha J N. "$(dirname $0)"/lib/probe.sh 141ad5a182SArnaldo Carvalho de Melo 151ad5a182SArnaldo Carvalho de Meloskip_if_no_perf_probe || exit 2 1683244772STommi Rantalaskip_if_no_perf_trace || exit 2 171ad5a182SArnaldo Carvalho de Melo 1838beba67SAkanksha J N. "$(dirname $0)"/lib/probe_vfs_getname.sh 19e498f336SArnaldo Carvalho de Melo 20e498f336SArnaldo Carvalho de Melotrace_open_vfs_getname() { 2138beba67SAkanksha J N evts="$(echo "$(perf list syscalls:sys_enter_open* 2>/dev/null | grep -E 'open(at)? ' | sed -r 's/.*sys_enter_([a-z]+) +\[.*$/\1/')" | sed ':a;N;s:\n:,:g')" 2269b5c953SMichael Petlan perf trace -e $evts touch $file 2>&1 | \ 23*6f769c34SArnaldo Carvalho de Melo grep -E " +[0-9]+\.[0-9]+ +\( +[0-9]+\.[0-9]+ ms\): +touch/[0-9]+ open(at)?\((dfd: +CWD, +)?filename: +\"?${file}\"?, +flags: CREAT\|NOCTTY\|NONBLOCK\|WRONLY, +mode: +IRUGO\|IWUGO\) += +[0-9]+$" 24e498f336SArnaldo Carvalho de Melo} 25e498f336SArnaldo Carvalho de Melo 26e498f336SArnaldo Carvalho de Melo 27e498f336SArnaldo Carvalho de Meloadd_probe_vfs_getname || skip_if_no_debuginfo 28e498f336SArnaldo Carvalho de Meloerr=$? 29e498f336SArnaldo Carvalho de Meloif [ $err -ne 0 ] ; then 30e498f336SArnaldo Carvalho de Melo exit $err 31e498f336SArnaldo Carvalho de Melofi 32e498f336SArnaldo Carvalho de Melo 3339c53488SJames Clarkfile=$(mktemp /tmp/temporary_file.XXXXX) 3439c53488SJames Clark 354fe94ce1SArnaldo Carvalho de Melo# Do not use whatever ~/.perfconfig file, it may change the output 364fe94ce1SArnaldo Carvalho de Melo# via trace.{show_timestamp,show_prefix,etc} 374fe94ce1SArnaldo Carvalho de Meloexport PERF_CONFIG=/dev/null 384fe94ce1SArnaldo Carvalho de Melo 39e498f336SArnaldo Carvalho de Melotrace_open_vfs_getname 40e498f336SArnaldo Carvalho de Meloerr=$? 41e498f336SArnaldo Carvalho de Melorm -f ${file} 42e498f336SArnaldo Carvalho de Melocleanup_probe_vfs_getname 43e498f336SArnaldo Carvalho de Meloexit $err 44