| # Check open filename arg using perf trace + vfs_getname |
| |
| # Uses the 'perf test shell' library to add probe:vfs_getname to the system |
| # then use it with 'perf trace' using 'touch' to write to a temp file, then |
| # checks that that was captured by the vfs_getname was used by 'perf trace', |
| # that already handles "probe:vfs_getname" if present, and used in the |
| # "open" syscall "filename" argument beautifier. |
| |
| # Arnaldo Carvalho de Melo <acme@kernel.org>, 2017 |
| |
| . $(dirname $0)/lib/probe.sh |
| |
| skip_if_no_perf_probe || exit 2 |
| |
| . $(dirname $0)/lib/probe_vfs_getname.sh |
| |
| file=$(mktemp /tmp/temporary_file.XXXXX) |
| |
| trace_open_vfs_getname() { |
| evts=$(echo $(perf list syscalls:sys_enter_open* 2>&1 | egrep 'open(at)? ' | sed -r 's/.*sys_enter_([a-z]+) +\[.*$/\1/') | sed 's/ /,/') |
| perf trace -e $evts touch $file 2>&1 | \ |
| 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]+$" |
| } |
| |
| |
| add_probe_vfs_getname || skip_if_no_debuginfo |
| err=$? |
| if [ $err -ne 0 ] ; then |
| exit $err |
| fi |
| |
| # Do not use whatever ~/.perfconfig file, it may change the output |
| # via trace.{show_timestamp,show_prefix,etc} |
| export PERF_CONFIG=/dev/null |
| |
| trace_open_vfs_getname |
| err=$? |
| rm -f ${file} |
| cleanup_probe_vfs_getname |
| exit $err |
