[tip:perf/core] tools lib traceevent: Unregister handler when function plugin is unloaded

From: tip-bot for Namhyung Kim
Date: Sun Jan 19 2014 - 07:23:18 EST

Commit-ID: ac668c7b7d87c1895faf196a337b5ddfd32a0e21
Gitweb: http://git.kernel.org/tip/ac668c7b7d87c1895faf196a337b5ddfd32a0e21
Author: Namhyung Kim <namhyung@xxxxxxxxxx>
AuthorDate: Thu, 16 Jan 2014 11:31:09 +0900
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Thu, 16 Jan 2014 16:26:24 -0300

tools lib traceevent: Unregister handler when function plugin is unloaded

The function handler should be unregistered when the plugin is unloaded
otherwise it'll try to access invalid memory.

Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
Reviewed-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Acked-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung.kim@xxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1389839478-5887-4-git-send-email-namhyung@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
tools/lib/traceevent/plugin_function.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/tools/lib/traceevent/plugin_function.c b/tools/lib/traceevent/plugin_function.c
index 3946148..80ba4ff 100644
--- a/tools/lib/traceevent/plugin_function.c
+++ b/tools/lib/traceevent/plugin_function.c
@@ -148,6 +148,9 @@ void PEVENT_PLUGIN_UNLOADER(struct pevent *pevent)
int i, x;

+ pevent_unregister_event_handler(pevent, -1, "ftrace", "function",
+ function_handler, NULL);
for (i = 0; i <= cpus; i++) {
for (x = 0; x < fstack[i].size && fstack[i].stack[x]; x++)
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