Commit | Line | Data |
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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() { | |
69b5c953 MP |
20 | evts=$(echo $(perf list syscalls:sys_enter_open* |& egrep 'open(at)? ' | sed -r 's/.*sys_enter_([a-z]+) +\[.*$/\1/') | sed 's/ /,/') |
21 | perf trace -e $evts touch $file 2>&1 | \ | |
22 | 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]+$" | |
e498f336 ACM |
23 | } |
24 | ||
25 | ||
26 | add_probe_vfs_getname || skip_if_no_debuginfo | |
27 | err=$? | |
28 | if [ $err -ne 0 ] ; then | |
29 | exit $err | |
30 | fi | |
31 | ||
32 | trace_open_vfs_getname | |
33 | err=$? | |
34 | rm -f ${file} | |
35 | cleanup_probe_vfs_getname | |
36 | exit $err |