Print trace plugins in tracecmgr LIST output

Author: Artyom Abakumov

doc/README.services_extension

@@ -131,10 +131,11 @@ List of existing trace sessions
 	output
 		text messages with list and state of trace sessions
 			- Session ID: <number>
-			-   name:  <string>
-			-   user:  <string>
-			-   date:  YYYY-MM-DD HH:NN:SS
-			-   flags: <string>
+			-   name:    <string>
+			-   user:    <string>
+			-   date:    YYYY-MM-DD HH:NN:SS
+			-   flags:   <string>
+			-   plugins: <string list>
 
 		"name" is trace session name and not printed if empty.
 		"user" is creator user name

src/jrd/trace/TraceService.cpp

@@ -219,6 +219,10 @@ bool TraceSvcJrd::changeFlags(ULONG id, int setFlags, int clearFlags)
 
 void TraceSvcJrd::listSessions()
 {
+	// Do not use value from Config::getDefaultConfig() because
+	// tracemgr will reread config in embedded mode
+	constexpr const char* defaultPlugins = "<default>";
+
 	m_svc.started();
 
 	// Writing into service when storage is locked could lead to deadlock,
@@ -235,12 +239,12 @@ void TraceSvcJrd::listSessions()
 		{
 			m_svc.printf(false, "\nSession ID: %d\n", session.ses_id);
 			if (!session.ses_name.empty()) {
-				m_svc.printf(false, "  name:  %s\n", session.ses_name.c_str());
+				m_svc.printf(false, "  name:    %s\n", session.ses_name.c_str());
 			}
-			m_svc.printf(false, "  user:  %s\n", session.ses_user.c_str());
+			m_svc.printf(false, "  user:    %s\n", session.ses_user.c_str());
 
 			const struct tm* t = localtime(&session.ses_start);
-			m_svc.printf(false, "  date:  %04d-%02d-%02d %02d:%02d:%02d\n",
+			m_svc.printf(false, "  date:    %04d-%02d-%02d %02d:%02d:%02d\n",
 					t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
 					t->tm_hour, t->tm_min, t->tm_sec);
 
@@ -266,7 +270,10 @@ void TraceSvcJrd::listSessions()
 			if (session.ses_flags & trs_log_full) {
 				flags += ", log full";
 			}
-			m_svc.printf(false, "  flags: %s\n", flags.c_str());
+			m_svc.printf(false, "  flags:   %s\n", flags.c_str());
+
+			const char* pluginsList = session.getPluginsList();
+			m_svc.printf(false, "  plugins: %s\n", pluginsList ? pluginsList : defaultPlugins);
 		}
 	}
 }