Add the erts/emulator/utils/loaded script

1 files changed, 44 insertions, 0 deletions

diff --git a/erts/emulator/utils/loaded b/erts/emulator/utils/loaded
new file mode 100644
index 0000000000..99a66e7fdb
--- /dev/null
+++ b/erts/emulator/utils/loaded
@@ -0,0 +1,44 @@
+%% -*- erlang -*-
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 1998-2010. All Rights Reserved.
+%%
+%% The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved online at http://www.erlang.org/.
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and limitations
+%% under the License.
+%%
+%% %CopyrightEnd%
+%%
+
+%% Run like:
+%%   $ERL_TOP/bin/escript erts/emulator/utils/loaded
+
+-mode(compile).
+
+main(_) ->
+    LibDir = code:lib_dir(),
+    io:format("Library root is ~s\n", [LibDir]),
+    Wc = filename:join(LibDir, "*/ebin/*.beam"),
+    Beams = filelib:wildcard(Wc),
+    BeamFileSize = lists:sum([filelib:file_size(Beam) || Beam <- Beams]),
+    io:format("~w BEAM files containing ~w bytes\n",
+	      [length(Beams),BeamFileSize]),
+    Ms = [list_to_atom(filename:rootname(filename:basename(Beam))) ||
+	     Beam <- Beams],
+    [{module,_} = code:ensure_loaded(M) || M <- Ms],
+    <<"Current code: ",T/binary>> = erlang:system_info(loaded),
+    Digits = grab_digits(T),
+    io:format("~w modules comprising ~s words when loaded\n",
+	      [length(Ms),Digits]).
+
+grab_digits(<<H,T/binary>>) when $0 =< H, H =< $9 ->
+    [H|grab_digits(T)];
+grab_digits(<<$\n,_/binary>>) -> [].