Merge branch 'lukas/erts/forker'

* lukas/erts/forker: (28 commits)
  erts: Never abort in the forked child
  erts: Mend ASSERT makro for erl_child_setup
  erts: Allow enomem failures in port_SUITE
  erts: iter_port sleep longer on freebsd
  erts: Allow one dangling fd if there is a gethost port
  erts: Only use forker StackAck on freebsd
  erts: It is not possible to exit the forker driver
  erts: Add forker StartAck for port start flowcontrol
  erts: Fix large open_port arg segfault for win32
  erts: Fix memory leak at async open port
  kernel: Remove cmd server for unix os:cmd
  erts: Add testcase for huge port environment
  erts: Move os_pid to port hash to child setup
  erts: Handle all EINTR and EAGAIN cases in child setup
  erts: Make child_setup work with large environments
  erts: Fix forker driver ifdefs for win32
  erts: Fix uds socket handling for os x
  erts: Fix dereferencing of unaligned integer for sparc
  erts: Flatten too long io vectors in uds write
  erts: Add fd count test for spawn_driver
  ...

Conflicts:
	erts/emulator/beam/erl_node_tables.c
	erts/preloaded/src/erts_internal.erl

1 files changed, 24 insertions, 2 deletions

diff --git a/erts/emulator/test/driver_SUITE.erl b/erts/emulator/test/driver_SUITE.erl
index 4fd7b36e6a..ce55fe3c52 100644
--- a/erts/emulator/test/driver_SUITE.erl
+++ b/erts/emulator/test/driver_SUITE.erl
@@ -2395,13 +2395,35 @@ z_test(Config) when is_list(Config) ->
 
 check_io_debug() ->
     get_stable_check_io_info(),
-    {NoErrorFds, NoUsedFds, NoDrvSelStructs, NoDrvEvStructs}
+    {NoErrorFds, NoUsedFds, NoDrvSelStructs, NoDrvEvStructs} = CheckIoDebug
 	= erts_debug:get_internal_state(check_io_debug),
+    HasGetHost = has_gethost(),
+    ct:log("check_io_debug: ~p~n"
+           "HasGetHost: ~p",[CheckIoDebug, HasGetHost]),
     0 = NoErrorFds,
-    NoUsedFds = NoDrvSelStructs,
+    if
+        NoUsedFds == NoDrvSelStructs ->
+            ok;
+        HasGetHost andalso (NoUsedFds == (NoDrvSelStructs - 1)) ->
+            %% If the inet_gethost port is alive, we may have
+            %% one extra used fd that is not selected on
+            ok
+    end,
     0 = NoDrvEvStructs,
     ok.
 
+has_gethost() ->
+    has_gethost(erlang:ports()).
+has_gethost([P|T]) ->
+    case erlang:port_info(P, name) of
+        {name,"inet_gethost"++_} ->
+            true;
+        _ ->
+            has_gethost(T)
+    end;
+has_gethost([]) ->
+    false.
+
 %flush_msgs() ->
 %    receive
 %	M ->