Commit c3ca46ef authored by Masami Hiramatsu's avatar Masami Hiramatsu Committed by Shuah Khan
Browse files

ftrace/kprobes: selftests: Check kretprobe maxactive is supported 



Check the kretprobe maxactive is supported by kprobe_events
interface. To ensure the kernel feature, this changes ftrace
README to describe it.

Signed-off-by: default avatarMasami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: default avatarShuah Khan <shuahkh@osg.samsung.com>
parent 1d0864db

kernel/trace/trace.c

+2 −1
Original line number Diff line number Diff line
@@ -4473,7 +4473,8 @@ static const char readme_msg[] = 
#endif

#if defined(CONFIG_KPROBE_EVENTS) || defined(CONFIG_UPROBE_EVENTS)

	"\t  accepts: event-definitions (one definition per line)\n"

	"\t   Format: p|r[:[<group>/]<event>] <place> [<args>]\n"

	"\t   Format: p[:[<group>/]<event>] <place> [<args>]\n"

	"\t           r[maxactive][:[<group>/]<event>] <place> [<args>]\n"

	"\t           -:[<group>/]<event>\n"

#ifdef CONFIG_KPROBE_EVENTS

	"\t    place: [<module>:]<symbol>[+<offset>]|<memaddr>\n"

tools/testing/selftests/ftrace/test.d/kprobe/kretprobe_maxactive.tc

+1 −0
Original line number Diff line number Diff line
@@ -2,6 +2,7 @@ 
# description: Kretprobe dynamic event with maxactive



[ -f kprobe_events ] || exit_unsupported # this is configurable

grep -q 'r\[maxactive\]' README || exit_unsupported # this is older version



echo > kprobe_events

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