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selftests/ftrace: Add a test to probe module functions

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Add a kprobes test to ensure that we are able to add a probe on a
module function using 'p <mod>:<func>' format, with/without having to
specify a probe name.

Link: http://lkml.kernel.org/r/2d8087e25a7ad9206f3e2b7b4bb0c3c86eaa38af.1499453040.git.naveen.n.rao@linux.vnet.ibm.com

Suggested-by: Masami Hiramatsu <mhiramat@kernel.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Naveen N. Rao 2017-07-08 00:27:32 +05:30 committed by Steven Rostedt (VMware)
parent f7181e5aaa
commit ff431b1390
1 changed files with 28 additions and 0 deletions
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28
tools/testing/selftests/ftrace/test.d/kprobe/kprobe_module.tc Normal file
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#!/bin/sh
# description: Kprobe dynamic event - probing module
[ -f kprobe_events ] || exit_unsupported # this is configurable
disable_events
echo > kprobe_events
:;: "Add an event on a module function without specifying event name" ;:
MOD=`lsmod | head -n 2 | tail -n 1 | cut -f1 -d" "`
FUNC=`grep -m 1 ".* t .*\\[$MOD\\]" /proc/kallsyms | xargs | cut -f3 -d" "`
[ "x" != "x$MOD" -a "y" != "y$FUNC" ] || exit_unresolved
echo "p $MOD:$FUNC" > kprobe_events
PROBE_NAME=`echo $MOD:$FUNC | tr ".:" "_"`
test -d events/kprobes/p_${PROBE_NAME}_0 || exit_failure
:;: "Add an event on a module function with new event name" ;:
echo "p:event1 $MOD:$FUNC" > kprobe_events
test -d events/kprobes/event1 || exit_failure
:;: "Add an event on a module function with new event and group name" ;:
echo "p:kprobes1/event1 $MOD:$FUNC" > kprobe_events
test -d events/kprobes1/event1 || exit_failure
echo > kprobe_events