Commit-ID: dd004c475cd15a5749b04b0283d41ffdfa57d658
Gitweb: http://git.kernel.org/tip/dd004c475cd15a5749b04b0283d41ffdfa57d658
Author: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
AuthorDate: Tue, 27 Oct 2009 16:42:44 -0400
Committer: Ingo Molnar <mingo@xxxxxxx>
CommitDate: Thu, 29 Oct 2009 08:47:47 +0100
kprobe-tracer: Compare both of event-name and event-group to find probe
Fix find_probe_event() to compare both of event-name and
event-group. Without this fix, kprobe-tracer overwrites existing
same event-name probe even if its group-name is different.
Signed-off-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Jim Keniston <jkenisto@xxxxxxxxxx>
Cc: Ananth N Mavinakayanahalli <ananth@xxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Cc: Frank Ch. Eigler <fche@xxxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Jason Baron <jbaron@xxxxxxxxxx>
Cc: K.Prasad <prasad@xxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Srikar Dronamraju <srikar@xxxxxxxxxxxxxxxxxx>
LKML-Reference: <20091027204244.30545.27516.stgit@harusame>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
kernel/trace/trace_kprobe.c | 8 +++++---
1 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index b8ef707..a86c3ac 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -353,12 +353,14 @@ static void free_trace_probe(struct trace_probe *tp)
kfree(tp);
}
-static struct trace_probe *find_probe_event(const char *event)
+static struct trace_probe *find_probe_event(const char *event,
+ const char *group)
{
struct trace_probe *tp;
list_for_each_entry(tp, &probe_list, list)
- if (!strcmp(tp->call.name, event))
+ if (strcmp(tp->call.name, event) == 0 &&
+ strcmp(tp->call.system, group) == 0)
return tp;
return NULL;
}
@@ -383,7 +385,7 @@ static int register_trace_probe(struct trace_probe *tp)
mutex_lock(&probe_lock);
/* register as an event */
- old_tp = find_probe_event(tp->call.name);
+ old_tp = find_probe_event(tp->call.name, tp->call.system);
if (old_tp) {
/* delete old event */
unregister_trace_probe(old_tp);
--
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