Capture Chisels GC kick off & OOM error print (#1694)

Author: VadimZy

userspace/sysdig/chisels/wsysdig_summary.lua

@@ -458,6 +458,9 @@ function on_init()
 	finfraname = chisel.request_field("evt.arg.name")
 	fpname = chisel.request_field("proc.pname")
 
+	-- kick off GC
+	collectgarbage()
+
 	print('{"slices": [')
 	return true
 end
@@ -480,7 +483,6 @@ function on_capture_start()
 			end
 		end
 	end
-
 	parse_thread_table_startup()
 	return true
 end
@@ -736,6 +738,10 @@ function on_interval(ts_s, ts_ns, delta)
 	parse_thread_table_interval()
 	parse_container_table()
 
+	if nintervals == 0 then
+		-- clean up events  
+		collectgarbage() 
+	end
 --print(json.encode(ssummary.connectionCount, { indent = true }))
 	add_summaries(ts_s, ts_ns, gsummary, ssummary)
 	reset_summary(ssummary)

userspace/sysdig/sysdig.cpp

@@ -1668,6 +1668,12 @@ sysdig_init_res sysdig_init(int argc, char **argv)
 		handle_end_of_file(print_progress);
 		res.m_res = e.scap_rc();
 	}
+	catch (const std::runtime_error& e) 
+	{
+		cerr << e.what() << endl;
+		handle_end_of_file(print_progress);
+		res.m_res = EXIT_FAILURE;
+	}
 	catch(...)
 	{
 		handle_end_of_file(print_progress);