selftests: ftrace: Add a testcase for string type with kprobe_event

Add a testcase for string type with kprobe event.
This tests good/bad syntax combinations and also
the traced data is correct in several way.

Link: http://lkml.kernel.org/r/152129038381.31874.9201387794548737554.stgit@devbox

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Masami Hiramatsu 2018-03-17 21:39:44 +09:00 committed by Steven Rostedt (VMware)
parent 871bef2000
commit 5fbdbed797
1 changed files with 46 additions and 0 deletions

View File

@ -0,0 +1,46 @@
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# description: Kprobe event string type argument
[ -f kprobe_events ] || exit_unsupported # this is configurable
echo 0 > events/enable
echo > kprobe_events
case `uname -m` in
x86_64)
ARG2=%si
OFFS=8
;;
i[3456]86)
ARG2=%cx
OFFS=4
;;
aarch64)
ARG2=%x1
OFFS=8
;;
arm*)
ARG2=%r1
OFFS=4
;;
*)
echo "Please implement other architecture here"
exit_untested
esac
: "Test get argument (1)"
echo "p:testprobe create_trace_kprobe arg1=+0(+0(${ARG2})):string" > kprobe_events
echo 1 > events/kprobes/testprobe/enable
! echo test >> kprobe_events
tail -n 1 trace | grep -qe "testprobe.* arg1=\"test\""
echo 0 > events/kprobes/testprobe/enable
: "Test get argument (2)"
echo "p:testprobe create_trace_kprobe arg1=+0(+0(${ARG2})):string arg2=+0(+${OFFS}(${ARG2})):string" > kprobe_events
echo 1 > events/kprobes/testprobe/enable
! echo test1 test2 >> kprobe_events
tail -n 1 trace | grep -qe "testprobe.* arg1=\"test1\" arg2=\"test2\""
echo 0 > events/enable
echo > kprobe_events