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

From: tip-bot for Namhyung Kim
Date: Sun Jan 19 2014 - 07:23:54 EST


Commit-ID: 354a2bd0318e0758f93b8b24553f3376fa9dfa21
Gitweb: http://git.kernel.org/tip/354a2bd0318e0758f93b8b24553f3376fa9dfa21
Author: Namhyung Kim <namhyung@xxxxxxxxxx>
AuthorDate: Thu, 16 Jan 2014 11:31:12 +0900
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Thu, 16 Jan 2014 16:26:24 -0300

tools lib traceevent: Unregister handler when kvm plugin is unloaded

The kvm handlers should be unregistered when the plugin is unloaded
otherwise they'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/1389839478-5887-7-git-send-email-namhyung@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/lib/traceevent/plugin_kvm.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)

diff --git a/tools/lib/traceevent/plugin_kvm.c b/tools/lib/traceevent/plugin_kvm.c
index a0e282c..9e0e8c6 100644
--- a/tools/lib/traceevent/plugin_kvm.c
+++ b/tools/lib/traceevent/plugin_kvm.c
@@ -434,3 +434,32 @@ int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
PEVENT_FUNC_ARG_VOID);
return 0;
}
+
+void PEVENT_PLUGIN_UNLOADER(struct pevent *pevent)
+{
+ pevent_unregister_event_handler(pevent, -1, "kvm", "kvm_exit",
+ kvm_exit_handler, NULL);
+
+ pevent_unregister_event_handler(pevent, -1, "kvm", "kvm_emulate_insn",
+ kvm_emulate_insn_handler, NULL);
+
+ pevent_unregister_event_handler(pevent, -1, "kvmmmu", "kvm_mmu_get_page",
+ kvm_mmu_get_page_handler, NULL);
+
+ pevent_unregister_event_handler(pevent, -1, "kvmmmu", "kvm_mmu_sync_page",
+ kvm_mmu_print_role, NULL);
+
+ pevent_unregister_event_handler(pevent, -1,
+ "kvmmmu", "kvm_mmu_unsync_page",
+ kvm_mmu_print_role, NULL);
+
+ pevent_unregister_event_handler(pevent, -1, "kvmmmu", "kvm_mmu_zap_page",
+ kvm_mmu_print_role, NULL);
+
+ pevent_unregister_event_handler(pevent, -1, "kvmmmu",
+ "kvm_mmu_prepare_zap_page", kvm_mmu_print_role,
+ NULL);
+
+ pevent_unregister_print_function(pevent, process_is_writable_pte,
+ "is_writable_pte");
+}
--
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