1e498f336SArnaldo Carvalho de Melo# Check open filename arg using perf trace + vfs_getname 2e498f336SArnaldo Carvalho de Melo 3e498f336SArnaldo Carvalho de Melo# Uses the 'perf test shell' library to add probe:vfs_getname to the system 4e498f336SArnaldo Carvalho de Melo# then use it with 'perf trace' using 'touch' to write to a temp file, then 5e498f336SArnaldo Carvalho de Melo# checks that that was captured by the vfs_getname was used by 'perf trace', 6e498f336SArnaldo Carvalho de Melo# that already handles "probe:vfs_getname" if present, and used in the 7e498f336SArnaldo Carvalho de Melo# "open" syscall "filename" argument beautifier. 8e498f336SArnaldo Carvalho de Melo 9e498f336SArnaldo Carvalho de Melo# Arnaldo Carvalho de Melo <acme@kernel.org>, 2017 10e498f336SArnaldo Carvalho de Melo 111ad5a182SArnaldo Carvalho de Melo. $(dirname $0)/lib/probe.sh 121ad5a182SArnaldo Carvalho de Melo 131ad5a182SArnaldo Carvalho de Meloskip_if_no_perf_probe || exit 2 141ad5a182SArnaldo Carvalho de Melo 15e498f336SArnaldo Carvalho de Melo. $(dirname $0)/lib/probe_vfs_getname.sh 16e498f336SArnaldo Carvalho de Melo 17e498f336SArnaldo Carvalho de Melofile=$(mktemp /tmp/temporary_file.XXXXX) 18e498f336SArnaldo Carvalho de Melo 19e498f336SArnaldo Carvalho de Melotrace_open_vfs_getname() { 2069b5c953SMichael Petlan evts=$(echo $(perf list syscalls:sys_enter_open* |& egrep 'open(at)? ' | sed -r 's/.*sys_enter_([a-z]+) +\[.*$/\1/') | sed 's/ /,/') 2169b5c953SMichael Petlan perf trace -e $evts touch $file 2>&1 | \ 2269b5c953SMichael Petlan egrep " +[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]+$" 23e498f336SArnaldo Carvalho de Melo} 24e498f336SArnaldo Carvalho de Melo 25e498f336SArnaldo Carvalho de Melo 26e498f336SArnaldo Carvalho de Meloadd_probe_vfs_getname || skip_if_no_debuginfo 27e498f336SArnaldo Carvalho de Meloerr=$? 28e498f336SArnaldo Carvalho de Meloif [ $err -ne 0 ] ; then 29e498f336SArnaldo Carvalho de Melo exit $err 30e498f336SArnaldo Carvalho de Melofi 31e498f336SArnaldo Carvalho de Melo 32e498f336SArnaldo Carvalho de Melotrace_open_vfs_getname 33e498f336SArnaldo Carvalho de Meloerr=$? 34e498f336SArnaldo Carvalho de Melorm -f ${file} 35e498f336SArnaldo Carvalho de Melocleanup_probe_vfs_getname 36e498f336SArnaldo Carvalho de Meloexit $err 37