44 lines
1.4 KiB
Bash
Executable File
44 lines
1.4 KiB
Bash
Executable File
#!/bin/sh
|
|
# 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.
|
|
|
|
# SPDX-License-Identifier: GPL-2.0
|
|
# Arnaldo Carvalho de Melo <acme@kernel.org>, 2017
|
|
|
|
. $(dirname $0)/lib/probe.sh
|
|
|
|
skip_if_no_perf_probe || exit 2
|
|
skip_if_no_perf_trace || 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>/dev/null | 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
|