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selftests/ftrace: check for do_sys_openat2 in user-memory test

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More recent libc implementations are now using openat/openat2 system
calls so also add do_sys_openat2 to the tracing so that the test
passes on these systems because do_sys_open may not be called.

Thanks to Masami Hiramatsu for the help on getting this fix to work
correctly.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
Colin Ian King 2020-10-02 14:25:01 +01:00 committed by Shuah Khan
parent dc6bf4da82
commit e3e4031256
1 changed files with 4 additions and 0 deletions
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4
tools/testing/selftests/ftrace/test.d/kprobe/kprobe_args_user.tc
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@ -9,12 +9,16 @@ grep -A10 "fetcharg:" README | grep -q '\[u\]<offset>' || exit_unsupported
:;: "user-memory access syntax and ustring working on user memory";:
echo 'p:myevent do_sys_open path=+0($arg2):ustring path2=+u0($arg2):string' \
> kprobe_events
echo 'p:myevent2 do_sys_openat2 path=+0($arg2):ustring path2=+u0($arg2):string' \
>> kprobe_events
grep myevent kprobe_events | \
grep -q 'path=+0($arg2):ustring path2=+u0($arg2):string'
echo 1 > events/kprobes/myevent/enable
echo 1 > events/kprobes/myevent2/enable
echo > /dev/null
echo 0 > events/kprobes/myevent/enable
echo 0 > events/kprobes/myevent2/enable
grep myevent trace | grep -q 'path="/dev/null" path2="/dev/null"'