Provide comma-separated list of all process names

core/CMakeLists.txt

@@ -145,6 +145,7 @@ define(_LF_CLOCK_SYNC_EXCHANGES_PER_INTERVAL)
 define(_LF_CLOCK_SYNC_INITIAL)
 define(_LF_CLOCK_SYNC_ON)
 define(_LF_CLOCK_SYNC_PERIOD_NS)
+define(_LF_FEDERATE_NAMES_COMMA_SEPARATED)
 define(ADVANCE_MESSAGE_INTERVAL)
 define(EXECUTABLE_PREAMBLE)
 define(FEDERATED_CENTRALIZED)

core/federated/RTI/main.c

@@ -312,7 +312,7 @@ int main(int argc, const char* argv[]) {
     // sync thread. Add 1 for the thread that responds to erroneous
     // connections attempted after initialization phase has completed. Add 1
     // for the main thread.
-    lf_tracing_global_init("rti", -1, _lf_number_of_workers * 2 + 3);
+    lf_tracing_global_init("rti", NULL, -1, _lf_number_of_workers * 2 + 3);
     lf_print("Tracing the RTI execution in %s file.", rti_trace_file_name);
   }
 

core/reactor_common.c

@@ -1215,9 +1215,9 @@ void initialize_global(void) {
   // -- threads are spawned to listen to upstream federates. Add 1 for the
   // clock sync thread and add 1 for the staa thread
   max_threads_tracing += NUMBER_OF_FEDERATES + 2;
-  lf_tracing_global_init(envs[0].name, FEDERATE_ID, max_threads_tracing);
+  lf_tracing_global_init(envs[0].name, _LF_FEDERATE_NAMES_COMMA_SEPARATED, FEDERATE_ID, max_threads_tracing);
 #else
-  lf_tracing_global_init("trace", 0, max_threads_tracing);
+  lf_tracing_global_init("main", NULL, 0, max_threads_tracing);
 #endif
   // Call the code-generated function to initialize all actions, timers, and ports
   // This is done for all environments/enclaves at the same time.

include/core/tracepoint.h

@@ -351,8 +351,9 @@ static inline void tracepoint_federate_from_federate(trace_event_t event_type, i
   (void)partner_id;
   (void)tag;
 }
-static inline void lf_tracing_global_init(char* file_name_prefix, int process_id, int max_num_local_threads) {
-  (void)file_name_prefix;
+static inline void lf_tracing_global_init(char* process_name, char* process_names, int process_id, int max_num_local_threads) {
+  (void)process_name;
+  (void)process_names;
   (void)process_id;
   (void)max_num_local_threads;
 }

trace/api/trace.h

@@ -176,12 +176,14 @@ typedef struct {
  * calling this procedure is undefined behavior.
  *
  * @param process_name The name of the current federate, or a placeholder if this is not a federate.
+ * @param process_names The names of all federates, separated by commas, or NULL
+ * if that information is not available.
  * @param process_id The ID of the current federate, or -1 if this is the RTI. 0
  * if unfederated.
  * @param max_num_local_threads An upper bound on the number of threads created
  * by this process.
  */
-void lf_tracing_global_init(char* process_name, int process_id, int max_num_local_threads);
+void lf_tracing_global_init(char* process_name, char* process_names, int process_id, int max_num_local_threads);
 /**
  * @brief Register a kind of trace event. This should be called before
  * tracepoints are reached.

trace/impl/src/trace_impl.c

@@ -253,7 +253,7 @@ void lf_tracing_tracepoint(int worker, trace_record_nodeps_t* tr) {
   }
 }
 
-void lf_tracing_global_init(char* process_name, int fedid, int max_num_local_threads) {
+void lf_tracing_global_init(char* process_name, char* process_names, int fedid, int max_num_local_threads) {
   trace_mutex = lf_platform_mutex_new();
   if (!trace_mutex) {
     fprintf(stderr, "WARNING: Failed to initialize trace mutex.\n");