Merge branch 'sverker/unsafe_CancelIoEx/OTP-8937' into dev

* sverker/unsafe_CancelIoEx/OTP-8937:
  Improve test case port_SUITE:close_deaf_port

erts/emulator/test/port_SUITE.erl

@@ -2302,7 +2302,8 @@ load_driver(Dir, Driver) ->
     end.
 
 
-close_deaf_port(doc) -> ["Send data to port program that does not read it, then close port."];
+close_deaf_port(doc) -> ["Send data to port program that does not read it, then close port."
+			 "Primary targeting Windows to test threaded_handle_closer in sys.c"];
 close_deaf_port(suite) -> [];
 close_deaf_port(Config) when is_list(Config) ->
     ?line Dog = test_server:timetrap(test_server:seconds(100)),
@@ -2312,24 +2313,22 @@ close_deaf_port(Config) when is_list(Config) ->
     ?line erlang:port_command(Port,"Hello, can you hear me!?!?"),
     ?line port_close(Port),
 
-    close_deaf_port_1(0, DeadPort).
+    Res = close_deaf_port_1(0, DeadPort),
+    ?line test_server:timetrap_cancel(Dog),
+    Res.
 
 close_deaf_port_1(1000, _) ->
     ok;
 close_deaf_port_1(N, Cmd) ->
     Timeout = integer_to_list(random:uniform(10*1000)),
-    try open_port({spawn,Cmd++" "++Timeout},[]) of
+    ?line try open_port({spawn_executable,Cmd},[{args,[Timeout]}]) of
     	Port ->
 	    ?line erlang:port_command(Port,"Hello, can you hear me!?!?"),
 	    ?line port_close(Port),
 	    close_deaf_port_1(N+1, Cmd)
     catch
-    	exit:eagain ->
+    	_:eagain ->
 	    {comment, "Could not spawn more than " ++ integer_to_list(N) ++ " OS processes."}
     end.
 
 
-repeat(0, _) -> ok;
-repeat(Cnt, Fun) ->
-    Fun(),
-    repeat(Cnt-1, Fun).