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# 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() {
test "$(uname -m)" = s390x && { svc="openat"; txt="dfd: +CWD, +"; }
perf trace -e ${svc:-open} touch $file 2>&1 | \
egrep " +[0-9]+\.[0-9]+ +\( +[0-9]+\.[0-9]+ ms\): +touch\/[0-9]+ ${svc:-open}\(${txt}filename: +${file}, +flags: CREAT\|NOCTTY\|NONBLOCK\|WRONLY, +mode: +IRUGO\|IWUGO\) += +[0-9]+$"
}
add_probe_vfs_getname || skip_if_no_debuginfo
err=$?
if [ $err -ne 0 ] ; then
exit $err
fi
trace_open_vfs_getname
err=$?
rm -f ${file}
cleanup_probe_vfs_getname
exit $err
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