[socket-nif|test] ttest improvements

Added a ttest lib module for some common functions.
Added a process (server handler and reader processes) stats
printouts. So far only used by the server.

There is still a "leak". Its a term leak. Some of the
functions take a ref as argument (recv, send and accept for
instance). This is stored internally, by way of a call to
the enif_make_copy, in order to be used later in a select
call. Its not "released" though, until the environment is
released, which happens when the socket dtor callback function
is called.

Possible solution: We need to keep "temporary" environments (one
for each of the queues), which we can clear (basically we need two,
one that is currently used for new ref's and one for the old ref's).

OTP-14831

1 files changed, 125 insertions, 0 deletions

diff --git a/erts/emulator/test/socket_test_ttest_lib.erl b/erts/emulator/test/socket_test_ttest_lib.erl
new file mode 100644
index 0000000000..71679bc6d6
--- /dev/null
+++ b/erts/emulator/test/socket_test_ttest_lib.erl
@@ -0,0 +1,125 @@
+%%
+%% %CopyrightBegin%
+%% 
+%% Copyright Ericsson AB 2018-2018. All Rights Reserved.
+%% 
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%% 
+%% %CopyrightEnd%
+%%
+
+-module(socket_test_ttest_lib).
+
+-compile({no_auto_import, [error/2]}).
+
+-export([
+         t/0, tdiff/2,
+         formated_timestamp/0, format_timestamp/1,
+         format_time/1,
+
+         formated_process_stats/1, formated_process_stats/2,
+
+         format/2,
+         error/1, error/2,
+         info/1, info/2
+        ]).
+
+%% ==========================================================================
+
+t() ->
+    os:timestamp().
+
+tdiff({A1, B1, C1} = _T1x, {A2, B2, C2} = _T2x) ->
+    T1 = A1*1000000000+B1*1000+(C1 div 1000), 
+    T2 = A2*1000000000+B2*1000+(C2 div 1000), 
+    T2 - T1.
+
+formated_timestamp() ->
+    format_timestamp(os:timestamp()).
+
+format_timestamp({_N1, _N2, N3} = TS) ->
+    {_Date, Time}  = calendar:now_to_local_time(TS),
+    {Hour,Min,Sec} = Time,
+    FormatTS = io_lib:format("~.2.0w:~.2.0w:~.2.0w.4~w",
+                             [Hour, Min, Sec, round(N3/1000)]),  
+    lists:flatten(FormatTS).
+
+%% Time is always in number os ms (milli seconds)
+%% At some point, we should convert this to a more readable format...
+format_time(T) ->
+    format("~p", [T]).
+
+
+formated_process_stats(Pid) ->
+    formated_process_stats("", Pid).
+
+formated_process_stats(Prefix, Pid) when is_list(Prefix) andalso is_pid(Pid) ->
+    try
+        begin
+            TotHeapSz = pi(Pid, total_heap_size),
+            HeapSz    = pi(Pid, heap_size),
+            StackSz   = pi(Pid, stack_size),
+            Reds      = pi(Pid, reductions),
+            GCInfo    = pi(Pid, garbage_collection),
+            MinBinVHeapSz = proplists:get_value(min_bin_vheap_size, GCInfo),
+            MinHeapSz     = proplists:get_value(min_heap_size,      GCInfo),
+            MinGCS        = proplists:get_value(minor_gcs,          GCInfo),
+            format("~n   ~sTotal Heap Size:         ~p"
+                   "~n   ~sHeap Size:               ~p"
+                   "~n   ~sStack Size:              ~p"
+                   "~n   ~sReductions:              ~p"
+                   "~n   ~s[GC] Min Bin VHeap Size: ~p"
+                   "~n   ~s[GC] Min Heap Size:      ~p"
+                   "~n   ~s[GC] Minor GCS:          ~p",
+                   [Prefix, TotHeapSz,
+                    Prefix, HeapSz,
+                    Prefix, StackSz,
+                    Prefix, Reds,
+                    Prefix, MinBinVHeapSz,
+                    Prefix, MinHeapSz,
+                    Prefix, MinGCS])
+        end
+    catch
+        _:_:_ ->
+            ""
+    end.
+
+
+pi(Pid, Item) ->
+    {Item, Info} = process_info(Pid, Item),
+    Info.
+
+
+
+%% ==========================================================================
+
+format(F, A) ->
+    lists:flatten(io_lib:format(F, A)).
+
+error(F) ->
+    error(F, []).
+
+error(F, A) ->
+    print(get(sname), "<ERROR> " ++ F, A).
+
+info(F) ->
+    info(F, []).
+
+info(F, A) ->
+    print(get(sname), "<INFO> " ++ F, A).
+
+print(undefined, F, A) ->
+    print("- ", F, A);
+print(Prefix, F, A) ->
+    io:format("[~s, ~s] " ++ F ++ "~n", [formated_timestamp(), Prefix |A]).
+