diff options
Diffstat (limited to 'erts/preloaded/src')
| -rw-r--r-- | erts/preloaded/src/prim_inet.erl | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/erts/preloaded/src/prim_inet.erl b/erts/preloaded/src/prim_inet.erl index 36a650cb5c..fb1269cf91 100644 --- a/erts/preloaded/src/prim_inet.erl +++ b/erts/preloaded/src/prim_inet.erl @@ -177,8 +177,32 @@ close_pend_loop(S, N) -> end. close_port(S) -> - catch erlang:port_close(S), - receive {'EXIT',S,_} -> ok after 0 -> ok end. + case erlang:process_info(self(), trap_exit) of + {trap_exit,true} -> + %% Ensure exit message and consume it + link(S), + %% This is still not a perfect solution. + %% + %% The problem is to close the port and consume any exit + %% message while not knowing if this process traps exit + %% nor if this process has a link to the port. Here we + %% just knows that this process traps exit. + %% + %% If we right here get killed for some reason that exit + %% signal will propagate to the port and onwards to anyone + %% that is linked to the port. E.g when we close a socket + %% that is not ours. + %% + %% The problem can be solved with lists:member on our link + %% list but we deem that as potentially too expensive. We + %% need an is_linked/1 function or guard, or we need + %% a port_close function that can atomically unlink... + catch erlang:port_close(S), + receive {'EXIT',S,_} -> ok end; + {trap_exit,false} -> + catch erlang:port_close(S), + ok + end. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% |