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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@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: K.Prasad <prasad@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
LKML-Reference: <20091027204244.30545.27516.stgit@harusame>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Masami Hiramatsu 2009-10-27 16:42:44 -04:00 committed by Ingo Molnar
parent 3f7e454af1
commit dd004c475c
1 changed files with 5 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
kernel/trace/trace_kprobe.c
View File

@ -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);