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authorErlang/OTP <[email protected]>2009-11-20 14:54:40 +0000
committerErlang/OTP <[email protected]>2009-11-20 14:54:40 +0000
commit84adefa331c4159d432d22840663c38f155cd4c1 (patch)
treebff9a9c66adda4df2106dfd0e5c053ab182a12bd /erts/emulator/test/bs_bincomp_SUITE.erl
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The R13B03 release.OTP_R13B03
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+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2006-2009. 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%
+%%
+
+%% Originally based on Per Gustafsson's test suite.
+%%
+
+-module(bs_bincomp_SUITE).
+
+-export([all/1,
+ byte_aligned/1,bit_aligned/1,extended_byte_aligned/1,
+ extended_bit_aligned/1,mixed/1,tracing/1]).
+
+-include("test_server.hrl").
+
+all(suite) ->
+ [byte_aligned,bit_aligned,extended_byte_aligned,
+ extended_bit_aligned,mixed,tracing].
+
+
+byte_aligned(Config) when is_list(Config) ->
+ <<"abcdefg">> = << <<(X+32)>> || <<X>> <= <<"ABCDEFG">> >>,
+ <<1:32/little,2:32/little,3:32/little,4:32/little>> =
+ << <<X:32/little>> || <<X:32>> <= <<1:32,2:32,3:32,4:32>> >>,
+ <<1:32/little,2:32/little,3:32/little,4:32/little>> =
+ << <<X:32/little>> || <<X:16>> <= <<1:16,2:16,3:16,4:16>> >>,
+ ok.
+
+bit_aligned(Config) when is_list(Config) ->
+ <<$a:7,$b:7,$c:7,$d:7,$e:7,$f:7,$g:7>> =
+ << <<(X+32):7>> || <<X>> <= <<"ABCDEFG">> >>,
+ <<"ABCDEFG">> =
+ << <<(X-32)>> || <<X:7>> <= <<$a:7,$b:7,$c:7,$d:7,$e:7,$f:7,$g:7>> >>,
+ <<1:31/little,2:31/little,3:31/little,4:31/little>> =
+ << <<X:31/little>> || <<X:31>> <= <<1:31,2:31,3:31,4:31>> >>,
+ <<1:31/little,2:31/little,3:31/little,4:31/little>> =
+ << <<X:31/little>> || <<X:15>> <= <<1:15,2:15,3:15,4:15>> >>,
+ ok.
+
+extended_byte_aligned(Config) when is_list(Config) ->
+ <<"abcdefg">> = << <<(X+32)>> || X <- "ABCDEFG" >>,
+ "abcdefg" = [(X+32) || <<X>> <= <<"ABCDEFG">>],
+ <<1:32/little,2:32/little,3:32/little,4:32/little>> =
+ << <<X:32/little>> || X <- [1,2,3,4] >>,
+ [256,512,768,1024] =
+ [X || <<X:16/little>> <= <<1:16,2:16,3:16,4:16>>],
+ ok.
+
+extended_bit_aligned(Config) when is_list(Config) ->
+ <<$a:7,$b:7,$c:7,$d:7,$e:7,$f:7,$g:7>> =
+ << <<(X+32):7>> || X <- "ABCDEFG" >>,
+ "ABCDEFG" = [(X-32) || <<X:7>> <= <<$a:7,$b:7,$c:7,$d:7,$e:7,$f:7,$g:7>>],
+ <<1:31/little,2:31/little,3:31/little,4:31/little>> =
+ << <<X:31/little>> || X <- [1,2,3,4] >>,
+ [256,512,768,1024] =
+ [X || <<X:15/little>> <= <<1:15,2:15,3:15,4:15>>],
+ ok.
+
+mixed(Config) when is_list(Config) ->
+ <<2,3,3,4,4,5,5,6>> =
+ << <<(X+Y)>> || <<X>> <= <<1,2,3,4>>, <<Y>> <= <<1,2>> >>,
+ <<2,3,3,4,4,5,5,6>> =
+ << <<(X+Y)>> || <<X>> <= <<1,2,3,4>>, Y <- [1,2] >>,
+ <<2,3,3,4,4,5,5,6>> =
+ << <<(X+Y)>> || X <- [1,2,3,4], Y <- [1,2] >>,
+ [2,3,3,4,4,5,5,6] =
+ [(X+Y) || <<X>> <= <<1,2,3,4>>, <<Y>> <= <<1,2>>],
+ [2,3,3,4,4,5,5,6] =
+ [(X+Y) || <<X>> <= <<1,2,3,4>>, Y <- [1,2]],
+ <<2:3,3:3,3:3,4:3,4:3,5:3,5:3,6:3>> =
+ << <<(X+Y):3>> || <<X:3>> <= <<1:3,2:3,3:3,4:3>>, <<Y:3>> <= <<1:3,2:3>> >>,
+ <<2:3,3:3,3:3,4:3,4:3,5:3,5:3,6:3>> =
+ << <<(X+Y):3>> || <<X:3>> <= <<1:3,2:3,3:3,4:3>>, Y <- [1,2] >>,
+ <<2:3,3:3,3:3,4:3,4:3,5:3,5:3,6:3>> =
+ << <<(X+Y):3>> || X <- [1,2,3,4], Y <- [1,2] >>,
+ [2,3,3,4,4,5,5,6] =
+ [(X+Y) || <<X:3>> <= <<1:3,2:3,3:3,4:3>>, <<Y:3>> <= <<1:3,2:3>>],
+ [2,3,3,4,4,5,5,6] =
+ [(X+Y) || <<X:3>> <= <<1:3,2:3,3:3,4:3>>, Y <- [1,2]],
+ ok.
+
+%% OTP-8179: Call tracing on binary comprehensions would cause a crash.
+tracing(Config) when is_list(Config) ->
+ Self = self(),
+ Tracer = spawn_opt(fun() -> tracer(Self, 0) end,
+ [link,{priority,max}]),
+ Pattern = [{'_',[],[{return_trace}]}],
+ erlang:trace_pattern({?MODULE,'_','_'}, Pattern, [local]),
+ erlang:trace(self(), true, [call,{tracer,Tracer}]),
+ random_binaries(1000),
+ Tracer ! done,
+ receive
+ {Tracer,N} ->
+ {comment,integer_to_list(N) ++ " trace messages"}
+ end.
+
+random_binary() ->
+ Seq = [1,2,3,4,5,6,7,8,9,10],
+ << <<($a + random:uniform($z - $a)):8>> || _ <- Seq >>.
+
+random_binaries(N) when N > 0 ->
+ random_binary(),
+ random_binaries(N - 1);
+random_binaries(_) -> ok.
+
+tracer(Parent, N) ->
+ receive
+ Msg ->
+ case Msg of
+ done ->
+ Parent ! {self(),N};
+ _ ->
+ tracer(Parent, N+1)
+ end
+ end.