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| author | Masami Hiramatsu <mhiramat@redhat.com> | 2009-10-27 16:42:44 -0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-10-29 08:47:47 +0100 |
| commit | dd004c475cd15a5749b04b0283d41ffdfa57d658 (patch) | |
| tree | e5656577b7a2805ed99dfaf6a966756568c6390d /kernel/trace/trace_kprobe.c | |
| parent | 3f7e454af1dd8b9cea410d9380d3f71477e94f2b (diff) | |
| download | lwn-dd004c475cd15a5749b04b0283d41ffdfa57d658.tar.gz lwn-dd004c475cd15a5749b04b0283d41ffdfa57d658.zip | |
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>
Diffstat (limited to 'kernel/trace/trace_kprobe.c')
| -rw-r--r-- | 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 b8ef707c84d7..a86c3ac0df21 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); |