detailed syscall tracing (work in progress)

[lttng-modules.git] / ltt-events.c

diff --git a/ltt-events.c b/ltt-events.c
index f9688f549be3bee9f105dd87b29130ef2839431d..c64c20368aa6ec07b4afa6a8b08e9a27ba5ad6af 100644 (file)
--- a/ltt-events.c
+++ b/ltt-events.c
@@ -266,7 +266,8 @@ void _ltt_channel_destroy(struct ltt_channel *chan)
  */
 struct ltt_event *ltt_event_create(struct ltt_channel *chan,
                                   struct lttng_kernel_event *event_param,
-                                  void *filter)
+                                  void *filter,
+                                  const struct lttng_event_desc *internal_desc)
 {
        struct ltt_event *event;
        int ret;
@@ -366,6 +367,9 @@ struct ltt_event *ltt_event_create(struct ltt_channel *chan,
                WARN_ON_ONCE(!ret);
                break;
        case LTTNG_KERNEL_NOOP:
+               event->desc = internal_desc;
+               if (!event->desc)
+                       goto register_error;
                break;
        default:
                WARN_ON_ONCE(1);
@@ -378,10 +382,7 @@ struct ltt_event *ltt_event_create(struct ltt_channel *chan,
        return event;
 
 statedump_error:
-       WARN_ON_ONCE(tracepoint_probe_unregister(event_param->name,
-                               event->desc->probe_callback,
-                               event));
-       ltt_event_put(event->desc);
+       /* If a statedump error occurs, events will not be readable. */
 register_error:
        kmem_cache_free(event_cache, event);
 cache_error:
@@ -418,6 +419,9 @@ int _ltt_event_unregister(struct ltt_event *event)
                lttng_ftrace_unregister(event);
                ret = 0;
                break;
+       case LTTNG_KERNEL_NOOP:
+               ret = 0;
+               break;
        default:
                WARN_ON_ONCE(1);
        }
@@ -446,6 +450,8 @@ void _ltt_event_destroy(struct ltt_event *event)
                module_put(event->desc->owner);
                lttng_ftrace_destroy_private(event);
                break;
+       case LTTNG_KERNEL_NOOP:
+               break;
        default:
                WARN_ON_ONCE(1);
        }