| # 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. |
| |
| # 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: +\([[:xdigit:]]+\) +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 |
