tools/perf/tests/shell/trace+probe_vfs_getname.sh

   1 # Check open filename arg using perf trace + vfs_getname
   2
   3 # Uses the 'perf test shell' library to add probe:vfs_getname to the system
   4 # then use it with 'perf trace' using 'touch' to write to a temp file, then
   5 # checks that that was captured by the vfs_getname was used by 'perf trace',
   6 # that already handles "probe:vfs_getname" if present, and used in the
   7 # "open" syscall "filename" argument beautifier.
   8
   9 # Arnaldo Carvalho de Melo <acme@kernel.org>, 2017
  10
  11 . $(dirname $0)/lib/probe.sh
  12
  13 skip_if_no_perf_probe || exit 2
  14
  15 . $(dirname $0)/lib/probe_vfs_getname.sh
  16
  17 file=$(mktemp /tmp/temporary_file.XXXXX)
  18
  19 trace_open_vfs_getname() {
  20         perf trace -e open touch $file 2>&1 | \
  21         egrep " +[0-9]+\.[0-9]+ +\( +[0-9]+\.[0-9]+ ms\): +touch\/[0-9]+ open\(filename: +${file}, +flags: CREAT\|NOCTTY\|NONBLOCK\|WRONLY, +mode: +IRUGO\|IWUGO\) += +[0-9]+$"
  22 }
  23
  24
  25 add_probe_vfs_getname || skip_if_no_debuginfo
  26 err=$?
  27 if [ $err -ne 0 ] ; then
  28         exit $err
  29 fi
  30
  31 trace_open_vfs_getname
  32 err=$?
  33 rm -f ${file}
  34 cleanup_probe_vfs_getname
  35 exit $err