Error out if filter expression is attached to unsupported event types

[lttng-tools.git] / src / bin / lttng / commands / enable_events.c

diff --git a/src/bin/lttng/commands/enable_events.c b/src/bin/lttng/commands/enable_events.c
index 62f99a1fcfc760e659a3ab1c3a0e775fc79dccec..d973c5f6e1cc3579998aead3e2fba656f96ad428 100644 (file)
--- a/src/bin/lttng/commands/enable_events.c
+++ b/src/bin/lttng/commands/enable_events.c
@@ -965,6 +965,30 @@ static int enable_events(char *session_name)
                }
        }
 
+       /*
+        * Adding a filter to a probe, function or userspace-probe would be
+        * denied by the kernel tracer as it's not supported at the moment. We
+        * do an early check here to warn the user.
+        */
+       if (opt_filter && opt_kernel) {
+               switch (opt_event_type) {
+               case LTTNG_EVENT_ALL:
+               case LTTNG_EVENT_TRACEPOINT:
+               case LTTNG_EVENT_SYSCALL:
+                       break;
+               case LTTNG_EVENT_PROBE:
+               case LTTNG_EVENT_USERSPACE_PROBE:
+               case LTTNG_EVENT_FUNCTION:
+                       ERR("Filter expressions are not supported for %s events",
+                                       get_event_type_str(opt_event_type));
+                       ret = CMD_ERROR;
+                       goto error;
+               default:
+                       ret = CMD_UNDEFINED;
+                       goto error;
+               }
+       }
+
        channel_name = opt_channel_name;
 
        handle = lttng_create_handle(session_name, &dom);