%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2002-2017. 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(evil_SUITE).
-export([all/0, suite/0,
heap_frag/1,
encode_decode_ext/1,
decode_integer_ext/1,
decode_small_big_ext/1,
decode_large_big_ext/1,
decode_small_big_ext_neg/1,
decode_large_big_ext_neg/1,
decode_too_small/1,
decode_pos_neg_zero/1]).
-include_lib("common_test/include/ct.hrl").
suite() ->
[{ct_hooks,[ts_install_cth]},
{timetrap, {minutes, 1}}].
all() ->
[heap_frag, encode_decode_ext, decode_integer_ext,
decode_small_big_ext, decode_large_big_ext,
decode_small_big_ext_neg, decode_large_big_ext_neg,
decode_too_small, decode_pos_neg_zero].
heap_frag(Config) when is_list(Config) ->
N = 512,
Self = self(),
Pid = spawn_link(fun() -> appender(Self, N) end),
receive
{Pid,Res} ->
Res = my_appender(N);
Garbage ->
io:format("Garbage: ~p\n", [Garbage]),
ct:fail(got_garbage)
end.
%% ######################################################################## %%
%% "Interesting" integers taken from erl_interface ei_decode_SUITE.erl
%% These test cases are not "evil" but the next test case is....
encode_decode_ext(Config) when is_list(Config) ->
enc_dec( 2, 0), % SMALL_INTEGER_EXT smallest
enc_dec( 2, 255), % SMALL_INTEGER_EXT largest
enc_dec( 5, 256), % INTEGER_EXT smallest pos (*)
enc_dec( 5, -1), % INTEGER_EXT largest neg
enc_dec( 5, 16#07ffffff), % INTEGER_EXT largest (28 bits)
enc_dec( 5,-16#08000000), % INTEGER_EXT smallest
enc_dec( 7, 16#08000000), % SMALL_BIG_EXT smallest pos(*)
enc_dec( 7,-16#08000001), % SMALL_BIG_EXT largest neg (*)
enc_dec( 7, 16#7fffffff), % SMALL_BIG_EXT largest i32
enc_dec( 7,-16#80000000), % SMALL_BIG_EXT smallest i32
enc_dec( 7, 16#80000000), % SMALL_BIG_EXT u32
enc_dec( 7, 16#ffffffff), % SMALL_BIG_EXT largest u32
enc_dec( 9, 16#7fffffffffff), % largest i48
enc_dec( 9,-16#800000000000), % smallest i48
enc_dec( 9, 16#ffffffffffff), % largest u48
enc_dec(11, 16#7fffffffffffffff), % largest i64
enc_dec(11,-16#8000000000000000), % smallest i64
enc_dec(11, 16#ffffffffffffffff), % largest u64
ok.
%% ######################################################################## %%
%% "Interesting" integers taken from erl_interface ei_decode_SUITE.erl
%% These test the decoding "unusual", i.e. integers packed according
%% to "erts/emulator/internal_doc/erl_ext_dist.txt" but not the way
%% the emulator or erl_interface encode them.
%%
%% NOTE!!!! The comments below after a decode line is how it currently
%% is encoded in the external format by the emulator and
%% erl_interface, i.e. not how it is encoded in the test case below.
decode_integer_ext(Config) when is_list(Config) ->
decode( 0, <<131,98, 0:32>>), % SMALL_INTEGER_EXT
decode( 42, <<131,98, 42:32>>), % SMALL_INTEGER_EXT
decode(255, <<131,98,255:32>>), % SMALL_INTEGER_EXT
decode( 16#08000000, <<131,98, 16#08000000:32>>), % SMALL_BIG_EXT
decode(-16#08000001, <<131,98,-16#08000001:32>>), % SMALL_BIG_EXT
decode( 16#7fffffff, <<131,98, 16#7fffffff:32>>), % SMALL_BIG_EXT
decode(-16#80000000, <<131,98,-16#80000000:32>>), % SMALL_BIG_EXT
ok.
decode_small_big_ext(Config) when is_list(Config) ->
decode(256,<<131,110,2,0,0,1>>), % INTEGER_EXT
decode(16#07ffffff,<<131,110,4,0,255,255,255,7>>), % INTEGER_EXT
decode(16#7fffffff,<<131,110,4,0,255,255,255,127>>), % SMALL_BIG_EXT
decode(42,<<131,110,1,0,42>>), % SMALL_INTEGER_EXT
decode(42,<<131,110,2,0,42,0>>), % Redundant zeros from now on
decode(42,<<131,110,3,0,42,0,0>>),
decode(42,<<131,110,4,0,42,0,0,0>>),
decode(42,<<131,110,5,0,42,0,0,0,0>>),
decode(42,<<131,110,6,0,42,0,0,0,0,0>>),
decode(42,<<131,110,7,0,42,0,0,0,0,0,0>>),
decode(42,<<131,110,8,0,42,0,0,0,0,0,0,0>>),
ok.
decode_large_big_ext(Config) when is_list(Config) ->
decode(256,<<131,111,2:32,0,0,1>>), % INTEGER_EXT
decode(16#07ffffff,<<131,111,4:32,0,255,255,255,7>>), % INTEG_EXT
decode(16#7fffffff,<<131,111,4:32,0,255,255,255,127>>), % SMA_BIG
decode(16#ffffffff,<<131,111,4:32,0,255,255,255,255>>), % SMA_BIG
N = largest_small_big(),
decode(N,<<131,111,255:32,0,N:2040/little>>), % SMALL_BIG_EXT
decode(42,<<131,111,1:32,0,42>>),
decode(42,<<131,111,2:32,0,42,0>>), % Redundant zeros from now on
decode(42,<<131,111,3:32,0,42,0,0>>),
decode(42,<<131,111,4:32,0,42,0,0,0>>),
decode(42,<<131,111,5:32,0,42,0,0,0,0>>),
decode(42,<<131,111,6:32,0,42,0,0,0,0,0>>),
decode(42,<<131,111,7:32,0,42,0,0,0,0,0,0>>),
decode(42,<<131,111,8:32,0,42,0,0,0,0,0,0,0>>),
ok.
decode_small_big_ext_neg(Config) when is_list(Config) ->
decode(-1,<<131,110,1,1,1>>), % INTEGER_EXT
decode(-16#08000000,<<131,110,4,1,0,0,0,8>>), % INTEGER_EXT
decode(-16#80000000,<<131,110,4,1,0,0,0,128>>), % SMALL_BIG_EXT
decode(-16#ffffffff,<<131,110,4,1,255,255,255,255>>), % SMALL_BIG_EXT
N = largest_small_big(),
decode(-N,<<131,111,255:32,1,N:2040/little>>), % SMALL_BIG_EXT
decode(-42,<<131,110,1,1,42>>),
decode(-42,<<131,110,2,1,42,0>>), % Redundant zeros from now on
decode(-42,<<131,110,3,1,42,0,0>>),
decode(-42,<<131,110,4,1,42,0,0,0>>),
decode(-42,<<131,110,5,1,42,0,0,0,0>>),
decode(-42,<<131,110,6,1,42,0,0,0,0,0>>),
decode(-42,<<131,110,7,1,42,0,0,0,0,0,0>>),
decode(-42,<<131,110,8,1,42,0,0,0,0,0,0,0>>),
ok.
decode_large_big_ext_neg(Config) when is_list(Config) ->
decode(-1,<<131,111,1:32,1,1>>), % INTEGER_EXT
decode(-16#08000000,<<131,111,4:32,1,0,0,0,8>>), % INTEGER_EXT
decode(-16#80000000,<<131,111,4:32,1,0,0,0,128>>), % SMALL_BIG_EXT
decode(-42,<<131,111,1:32,1,42>>),
decode(-42,<<131,111,2:32,1,42,0>>), % Redundant zeros from now on
decode(-42,<<131,111,3:32,1,42,0,0>>),
decode(-42,<<131,111,4:32,1,42,0,0,0>>),
decode(-42,<<131,111,5:32,1,42,0,0,0,0>>),
decode(-42,<<131,111,6:32,1,42,0,0,0,0,0>>),
decode(-42,<<131,111,7:32,1,42,0,0,0,0,0,0>>),
decode(-42,<<131,111,8:32,1,42,0,0,0,0,0,0,0>>),
ok.
decode_pos_neg_zero(Config) when is_list(Config) ->
decode( 0, <<131,110,0,0>>), % SMALL_BIG_EXT (positive zero)
decode( 0, <<131,110,1,0,0>>), % SMALL_BIG_EXT (positive zero)
decode( 0, <<131,110,0,1>>), % SMALL_BIG_EXT (negative zero)
decode( 0, <<131,110,1,1,0>>), % SMALL_BIG_EXT (negative zero)
decode( 0, <<131,111,0:32,0>>), % SMALL_BIG_EXT (positive zero)
decode( 0, <<131,111,1:32,0,0>>), % SMALL_BIG_EXT (positive zero)
decode( 0, <<131,111,0:32,1>>), % SMALL_BIG_EXT (negative zero)
decode( 0, <<131,111,1:32,1,0>>), % SMALL_BIG_EXT (negative zero)
N = largest_small_big(),
decode( N,<<131,110,255,0,N:2040/little>>), % largest SMALL_BIG_EXT
decode(-N,<<131,110,255,1,N:2040/little>>), % largest SMALL_BIG_EXT
ok.
%% Test to decode uncompleted encodings for all in "erl_ext_dist.txt"
decode_too_small(Config) when is_list(Config) ->
decode_badarg(<<131, 97>>),
decode_badarg(<<131, 98>>),
decode_badarg(<<131, 98, 0>>),
decode_badarg(<<131, 98, 0, 0>>),
decode_badarg(<<131, 98, 0, 0, 0>>),
decode_badarg(<<131, 99>>),
decode_badarg(<<131, 99, 0>>),
decode_badarg(<<131, 99, 0:240>>),
decode_badarg(<<131,100>>),
decode_badarg(<<131,100, 1:16/big>>),
decode_badarg(<<131,100, 2:16/big>>),
decode_badarg(<<131,100, 2:16/big, "A">>),
% FIXME node name "A" seem ok, should it be?
% decode_badarg(<<131,101,100,1:16/big,"A",42:32/big,0>>),
decode_badarg(<<131,101>>),
decode_badarg(<<131,101,106>>),
decode_badarg(<<131,101,255>>),
decode_badarg(<<131,101,106,42:8/big>>),
decode_badarg(<<131,101,106,42:16/big>>),
decode_badarg(<<131,101,255,42:24/big>>),
decode_badarg(<<131,101,255,42:32/big,0>>),
decode_badarg(<<131,101,100,1:16/big,"A">>),
decode_badarg(<<131,101,100,1:16/big,"A",42:32/big>>),
decode_badarg(<<131,102>>),
decode_badarg(<<131,102,106,42:32/big,0>>),
decode_badarg(<<131,102,255,42:32/big,0>>),
decode_badarg(<<131,102,100,1:16/big,"A">>),
decode_badarg(<<131,102,100,1:16/big,"A",42:32/big>>),
decode_badarg(<<131,103>>),
decode_badarg(<<131,103,106,42:32/big,0>>),
decode_badarg(<<131,103,255,42:32/big,0>>),
decode_badarg(<<131,103,100,1:16/big,"A">>),
decode_badarg(<<131,103,100,1:16/big,"A",42:32/big>>),
decode_badarg(<<131,103,100,1:16/big,"A",4:32/big,2:32/big>>),
decode_badarg(<<131,104>>),
decode_badarg(<<131,104, 1>>),
decode_badarg(<<131,104, 2, 106>>),
decode_badarg(<<131,105, 1:32/big>>),
decode_badarg(<<131,105, 2:32/big, 106>>),
decode_badarg(<<131,107>>),
decode_badarg(<<131,107, 1:16/big>>),
decode_badarg(<<131,107, 2:16/big>>),
decode_badarg(<<131,107, 2:16/big, "A">>),
decode_badarg(<<131,108>>),
decode_badarg(<<131,108, 1:32/big>>),
decode_badarg(<<131,108, 2:32/big>>),
decode_badarg(<<131,108, 2:32/big, 106>>), % FIXME don't use NIL
decode_badarg(<<131,109>>),
decode_badarg(<<131,109, 1:32/big>>),
decode_badarg(<<131,109, 2:32/big>>),
decode_badarg(<<131,109, 2:32/big, 42>>),
N = largest_small_big(),
decode_badarg(<<131,110>>),
decode_badarg(<<131,110,1>>),
decode_badarg(<<131,110,1,0>>),
decode_badarg(<<131,110,1,1>>),
decode_badarg(<<131,110,2,0,42>>),
decode_badarg(<<131,110,2,1,42>>),
decode_badarg(<<131,110,255,0,N:2032/little>>),
decode_badarg(<<131,110,255,1,N:2032/little>>),
decode_badarg(<<131,111>>),
decode_badarg(<<131,111, 1:32/big>>),
decode_badarg(<<131,111, 1:32/big,0>>),
decode_badarg(<<131,111, 1:32/big,1>>),
decode_badarg(<<131,111, 2:32/big,0,42>>),
decode_badarg(<<131,111, 2:32/big,1,42>>),
decode_badarg(<<131,111,256:32/big,0,N:2032/little>>),
decode_badarg(<<131,111,256:32/big,1,N:2032/little>>),
decode_badarg(<<131,111,256:32/big,0,N:2040/little>>),
decode_badarg(<<131,111,256:32/big,1,N:2040/little>>),
decode_badarg(<<131,111,257:32/big,0,N:2048/little>>),
decode_badarg(<<131,111,257:32/big,1,N:2048/little>>),
% Emulator dies if trying to create large bignum....
% decode_badarg(<<131,111,16#ffffffff:32/big,0>>),
% decode_badarg(<<131,111,16#ffffffff:32/big,1>>),
decode_badarg(<<131, 78>>),
decode_badarg(<<131, 78, 42>>),
decode_badarg(<<131, 78, 42, 1>>),
decode_badarg(<<131, 78, 42, 1:16/big>>),
decode_badarg(<<131, 78, 42, 2:16/big>>),
decode_badarg(<<131, 78, 42, 2:16/big, "A">>),
decode_badarg(<<131, 67>>),
decode_badarg(<<131,114>>),
decode_badarg(<<131,114,0>>),
decode_badarg(<<131,114,1:16/big>>),
decode_badarg(<<131,114,1:16/big,100>>),
decode_badarg(<<131,114,1:16/big,100,1:16/big>>),
decode_badarg(<<131,114,1:16/big,100,1:16/big,"A">>),
decode_badarg(<<131,114,1:16/big,100,1:16/big,"A",0>>),
decode_badarg(<<131,114,1:16/big,100,1:16/big,"A",0,42:8>>),
decode_badarg(<<131,114,1:16/big,100,1:16/big,"A",0,42:16>>),
decode_badarg(<<131,114,1:16/big,100,1:16/big,"A",0,42:24>>),
decode_badarg(<<131,117>>), % FIXME needs more tests
ok.
%% ######################################################################## %%
decode_badarg(Bin) ->
io:format("Trying ~w\n",[Bin]),
{'EXIT',{badarg,_}} = (catch binary_to_term(Bin)).
enc_dec(_Size, Term) ->
Bin = term_to_binary(Term),
Term = binary_to_term(Bin),
ok.
decode(Term, Binary) ->
io:format("Encoding ~w to ~w ... ",[Binary,Term]),
NewTerm = binary_to_term(Binary),
io:format("got ~w\n",[NewTerm]),
Term = NewTerm.
largest_small_big() ->
List = lists:duplicate(255,255),
Limbs = list_to_binary(List),
binary_to_term(<<131,110,255,0,Limbs/binary>>).
%% ######################################################################## %%
appender(Parent, N) ->
seed(),
Res = appender_1(N, {}),
Parent ! {self(),Res}.
appender_1(0, T) -> T;
appender_1(N, T0) ->
U = rnd_term(),
T = erlang:append_element(T0, U),
appender_1(N-1, T).
my_appender(N) ->
seed(),
my_appender_1(N, []).
my_appender_1(0, T) ->
list_to_tuple(lists:reverse(T));
my_appender_1(N, T0) ->
U = rnd_term(),
T = [U|T0],
my_appender_1(N-1, T).
seed() ->
rand:seed(exsplus, {3172,9815,20129}).
rnd_term() ->
U0 = rand:uniform(),
B = <<U0/float>>,
{U0,U0 * 2.5 + 3.14,[U0*2.3,B]}.
