Implement syscall wildcard support

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

diff --git a/lttng-events.c b/lttng-events.c
index 3616e010410134ee3021260cbf3d7de1bb018610..d09d4c2e81fa9560da8767863f31f0aca19358aa 100644 (file)
--- a/lttng-events.c
+++ b/lttng-events.c
@@ -481,6 +481,7 @@ struct lttng_event *_lttng_event_create(struct lttng_channel *chan,
        case LTTNG_KERNEL_KRETPROBE:
        case LTTNG_KERNEL_FUNCTION:
        case LTTNG_KERNEL_NOOP:
+       case LTTNG_KERNEL_SYSCALL:
                event_name = event_param->name;
                break;
        default:
@@ -614,6 +615,7 @@ struct lttng_event *_lttng_event_create(struct lttng_channel *chan,
                WARN_ON_ONCE(!ret);
                break;
        case LTTNG_KERNEL_NOOP:
+       case LTTNG_KERNEL_SYSCALL:
                event->enabled = 1;
                event->registered = 0;
                event->desc = event_desc;
@@ -711,6 +713,7 @@ int _lttng_event_unregister(struct lttng_event *event)
                ret = 0;
                break;
        case LTTNG_KERNEL_NOOP:
+       case LTTNG_KERNEL_SYSCALL:
                ret = 0;
                break;
        default:
@@ -744,6 +747,7 @@ void _lttng_event_destroy(struct lttng_event *event)
                lttng_ftrace_destroy_private(event);
                break;
        case LTTNG_KERNEL_NOOP:
+       case LTTNG_KERNEL_SYSCALL:
                break;
        default:
                WARN_ON_ONCE(1);
@@ -1025,6 +1029,8 @@ static
 int lttng_event_match_enabler(struct lttng_event *event,
                struct lttng_enabler *enabler)
 {
+       if (enabler->event_param.instrumentation != event->instrumentation)
+               return 0;
        if (lttng_desc_match_enabler(event->desc, enabler)
                        && event->chan == enabler->chan)
                return 1;
@@ -1046,13 +1052,8 @@ struct lttng_enabler_ref *lttng_event_enabler_ref(struct lttng_event *event,
        return NULL;
 }
 
-/*
- * Create struct lttng_event if it is missing and present in the list of
- * tracepoint probes.
- * Should be called with sessions mutex held.
- */
 static
-void lttng_create_event_if_missing(struct lttng_enabler *enabler)
+void lttng_create_tracepoint_if_missing(struct lttng_enabler *enabler)
 {
        struct lttng_session *session = enabler->chan->session;
        struct lttng_probe_desc *probe_desc;
@@ -1109,6 +1110,36 @@ void lttng_create_event_if_missing(struct lttng_enabler *enabler)
        }
 }
 
+static
+void lttng_create_syscall_if_missing(struct lttng_enabler *enabler)
+{
+       int ret;
+
+       ret = lttng_syscalls_register(enabler->chan, NULL);
+       WARN_ON_ONCE(ret);
+}
+
+/*
+ * Create struct lttng_event if it is missing and present in the list of
+ * tracepoint probes.
+ * Should be called with sessions mutex held.
+ */
+static
+void lttng_create_event_if_missing(struct lttng_enabler *enabler)
+{
+       switch (enabler->event_param.instrumentation) {
+       case LTTNG_KERNEL_TRACEPOINT:
+               lttng_create_tracepoint_if_missing(enabler);
+               break;
+       case LTTNG_KERNEL_SYSCALL:
+               lttng_create_syscall_if_missing(enabler);
+               break;
+       default:
+               WARN_ON_ONCE(1);
+               break;
+       }
+}
+
 /*
  * Create events associated with an enabler (if not already present),
  * and add backward reference from the event to the enabler.