Include tracetools version string as an arg for rcl_init

tracetools/include/tracetools/tracetools.h

@@ -8,6 +8,8 @@
 #define TRACEPOINT(event_name, ...) \
   (ros_trace_ ## event_name)(__VA_ARGS__)
 
+#define TRACETOOLS_VERSION "0.0.1"
+
 #ifdef __cplusplus
 extern "C"
 {

tracetools/src/tp_call.tp

@@ -4,10 +4,12 @@ TRACEPOINT_EVENT(
   ros2,
   rcl_init,
   TP_ARGS(
-    const void *, context_handle_arg
+    const void *, context_handle_arg,
+    const char *, version_arg
   ),
   TP_FIELDS(
     ctf_integer_hex(const void *, context_handle, context_handle_arg)
+    ctf_string(version, version_arg)
   )
 )
 

tracetools/src/tracetools.c

@@ -24,7 +24,8 @@ void TRACEPOINT(
   CONDITIONAL_TP(
     ros2,
     rcl_init,
-    context_handle);
+    context_handle,
+    TRACETOOLS_VERSION);
 }
 
 void TRACEPOINT(