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diff --git a/lib/debugger/test/bs_match_bin_SUITE.erl b/lib/debugger/test/bs_match_bin_SUITE.erl
new file mode 100644
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+++ b/lib/debugger/test/bs_match_bin_SUITE.erl
@@ -0,0 +1,114 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2000-2010. 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%
+%%
+
+
+-module(bs_match_bin_SUITE).
+
+-author('[email protected]').
+-export([all/1,init_per_testcase/2,fin_per_testcase/2,init_all/1,finish_all/1,
+	 byte_split_binary/1,bit_split_binary/1]).
+
+-include("test_server.hrl").
+
+all(suite) ->
+    [{conf,init_all,cases(),finish_all}].
+
+cases() ->
+    [byte_split_binary,bit_split_binary].
+
+init_per_testcase(_Case, Config) ->
+    test_lib:interpret(?MODULE),
+    Dog = test_server:timetrap(?t:minutes(1)),
+    [{watchdog,Dog}|Config].
+
+fin_per_testcase(_Case, Config) ->
+    Dog = ?config(watchdog, Config),
+    ?t:timetrap_cancel(Dog),
+    ok.
+
+init_all(Config) when is_list(Config) ->
+    ?line test_lib:interpret(?MODULE),
+    ?line true = lists:member(?MODULE, int:interpreted()),
+    ok.
+
+finish_all(Config) when is_list(Config) ->
+    ok.
+
+byte_split_binary(doc) -> "Tries to split a binary at all byte-aligned positions.";
+byte_split_binary(suite) -> [];
+byte_split_binary(Config) when list(Config) ->
+    ?line L = lists:seq(0, 57),
+    ?line B = mkbin(L),
+    ?line byte_split(L, B, size(B)).
+
+byte_split(L, B, Pos) when Pos >= 0 ->
+    ?line Sz1 = Pos,
+    ?line Sz2 = size(B) - Pos,
+    ?line <<B1:Sz1/binary,B2:Sz2/binary>> = B,
+    ?line B1 = list_to_binary(lists:sublist(L, 1, Pos)),
+    ?line B2 = list_to_binary(lists:nthtail(Pos, L)),
+    ?line byte_split(L, B, Pos-1);
+byte_split(_L, _B, _) -> ok.
+
+bit_split_binary(doc) -> "Tries to split a binary at all positions.";
+bit_split_binary(suite) -> [];
+bit_split_binary(Config) when list(Config) ->
+    Fun = fun(Bin, List, SkipBef, N) ->
+		  ?line SkipAft = 8*size(Bin) - N - SkipBef,
+		  io:format("~p, ~p, ~p", [SkipBef,N,SkipAft]),
+		  ?line <<_I1:SkipBef,OutBin:N/binary-unit:1,_I2:SkipAft>> = Bin,
+		  ?line OutBin = make_bin_from_list(List, N)
+	  end,
+    ?line bit_split_binary1(Fun, erlang:md5(<<1,2,3>>)),
+    ok.
+
+bit_split_binary1(Action, Bin) ->
+    BitList = bits_to_list(binary_to_list(Bin), 16#80),
+    bit_split_binary2(Action, Bin, BitList, 0).
+
+bit_split_binary2(Action, Bin, [_|T]=List, Bef) ->
+    bit_split_binary3(Action, Bin, List, Bef, size(Bin)*8),
+    bit_split_binary2(Action, Bin, T, Bef+1);
+bit_split_binary2(_Action, _Bin, [], _Bef) -> ok.
+
+bit_split_binary3(Action, Bin, List, Bef, Aft) when Bef =< Aft ->
+    Action(Bin, List, Bef, (Aft-Bef) div 8 * 8),
+    bit_split_binary3(Action, Bin, List, Bef, Aft-8);
+bit_split_binary3(_, _, _, _, _) -> ok.
+
+make_bin_from_list(_List, 0) ->
+    mkbin([]);
+make_bin_from_list(List, N) ->
+    list_to_binary([make_int(List, 8, 0),
+		    make_bin_from_list(lists:nthtail(8, List), N-8)]).
+
+
+make_int(_List, 0, Acc) -> Acc;
+make_int([H|T], N, Acc) -> make_int(T, N-1, Acc bsl 1 bor H).
+
+bits_to_list([_H|T], 0) -> bits_to_list(T, 16#80);
+bits_to_list([H|_]=List, Mask) ->
+    [case H band Mask of
+	 0 -> 0;
+	 _ -> 1
+     end|bits_to_list(List, Mask bsr 1)];
+bits_to_list([], _) -> [].
+
+
+mkbin(L) when list(L) -> list_to_binary(L).