projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| e498f336 ACM |
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 | ||
| 1ad5a182 ACM |
11 | . $(dirname $0)/lib/probe.sh |
| 12 | ||
| 13 | skip_if_no_perf_probe || exit 2 | |
| 14 | ||
| e498f336 ACM |
15 | . $(dirname $0)/lib/probe_vfs_getname.sh |
| 16 | ||
| 17 | file=$(mktemp /tmp/temporary_file.XXXXX) | |
| 18 | ||
| 19 | trace_open_vfs_getname() { | |
| ccafc38f TR |
20 | test "$(uname -m)" = s390x && { svc="openat"; txt="dfd: +CWD, +"; } |
| 21 | ||
| 22 | perf trace -e ${svc:-open} touch $file 2>&1 | \ | |
| 23 | 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]+$" | |
| e498f336 ACM |
24 | } |
| 25 | ||
| 26 | ||
| 27 | add_probe_vfs_getname || skip_if_no_debuginfo | |
| 28 | err=$? | |
| 29 | if [ $err -ne 0 ] ; then | |
| 30 | exit $err | |
| 31 | fi | |
| 32 | ||
| 33 | trace_open_vfs_getname | |
| 34 | err=$? | |
| 35 | rm -f ${file} | |
| 36 | cleanup_probe_vfs_getname | |
| 37 | exit $err |