aboutsummaryrefslogtreecommitdiffstats
path: root/lib/debugger/test/bs_match_int_SUITE.erl
blob: 9d2490eea2f2321c5aa90aa447a9616b4f60dbe5 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2000-2016. 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(bs_match_int_SUITE).

-export([all/0, suite/0,groups/0,init_per_group/2,end_per_group/2,
	 init_per_testcase/2,end_per_testcase/2,
	 init_per_suite/1,end_per_suite/1,
	 integer/1,signed_integer/1,dynamic/1,more_dynamic/1,mml/1,
	 match_huge_int/1,bignum/1,unaligned_32_bit/1]).

-include_lib("common_test/include/ct.hrl").

-import(lists, [seq/2]).

suite() -> [{ct_hooks,[ts_install_cth]}].

all() -> 
    [integer, signed_integer, dynamic, more_dynamic, mml,
     match_huge_int, bignum, unaligned_32_bit].

groups() -> 
    [].

init_per_group(_GroupName, Config) ->
    Config.

end_per_group(_GroupName, Config) ->
    Config.

init_per_testcase(_Case, Config) ->
    test_lib:interpret(?MODULE),
    Dog = test_server:timetrap(?t:minutes(4)),
    [{watchdog,Dog}|Config].

end_per_testcase(_Case, Config) ->
    Dog = ?config(watchdog, Config),
    ?t:timetrap_cancel(Dog),
    ok.

init_per_suite(Config) when is_list(Config) ->
    ?line test_lib:interpret(?MODULE),
    ?line true = lists:member(?MODULE, int:interpreted()),
    Config.

end_per_suite(Config) when is_list(Config) ->
    ok.

integer(Config) when is_list(Config) ->
    ?line 0 = get_int(mkbin([])),
    ?line 0 = get_int(mkbin([0])),
    ?line 42 = get_int(mkbin([42])),
    ?line 255 = get_int(mkbin([255])),
    ?line 256 = get_int(mkbin([1,0])),
    ?line 257 = get_int(mkbin([1,1])),
    ?line 258 = get_int(mkbin([1,2])),
    ?line 258 = get_int(mkbin([1,2])),
    ?line 65534 = get_int(mkbin([255,254])),
    ?line 16776455 = get_int(mkbin([255,253,7])),
    ?line 4245492555 = get_int(mkbin([253,13,19,75])),
    ?line 4294967294 = get_int(mkbin([255,255,255,254])),
    ?line 4294967295 = get_int(mkbin([255,255,255,255])),
    ?line Eight = [200,1,19,128,222,42,97,111],
    ?line cmp128(Eight, uint(Eight)),
    ?line fun_clause(catch get_int(mkbin(seq(1,5)))),
    ok.

get_int(Bin) ->
    I = get_int1(Bin),
    get_int(Bin, I).

get_int(Bin0, I) when size(Bin0) < 4 ->
    Bin = <<0,Bin0/binary>>,
    I = get_int1(Bin),
    get_int(Bin, I);
get_int(_, I) -> I.

get_int1(<<I:0>>) -> I;
get_int1(<<I:8>>) -> I;
get_int1(<<I:16>>) -> I;
get_int1(<<I:24>>) -> I;
get_int1(<<I:32>>) -> I.

cmp128(<<I:128>>, I) -> equal;
cmp128(_, _) -> not_equal.

signed_integer(Config) when is_list(Config) ->
    ?line {no_match,_} = sint(mkbin([])),
    ?line {no_match,_} = sint(mkbin([1,2,3])),
    ?line 127 = sint(mkbin([127])),
    ?line -1 = sint(mkbin([255])),
    ?line -128 = sint(mkbin([128])),
    ?line 42 = sint(mkbin([42,255])),
    ?line 127 = sint(mkbin([127,255])).

sint(Bin) ->
    case Bin of
	<<I:8/signed>> -> I;
	<<I:8/signed,_:3,_:5>> -> I;
	Other -> {no_match,Other}
    end.

uint(L) -> uint(L, 0).
uint([H|T], Acc) -> uint(T, Acc bsl 8 bor H);
uint([], Acc) -> Acc.

dynamic(Config) when is_list(Config) ->
    dynamic(mkbin([255]), 8),
    dynamic(mkbin([255,255]), 16),
    dynamic(mkbin([255,255,255]), 24),
    dynamic(mkbin([255,255,255,255]), 32),
    ok.

dynamic(Bin, S1) when S1 >= 0 ->
    S2 = size(Bin) * 8 - S1,
    dynamic(Bin, S1, S2, (1 bsl S1) - 1, (1 bsl S2) - 1),
    dynamic(Bin, S1-1);
dynamic(_, _) -> ok.

dynamic(Bin, S1, S2, A, B) ->
%    io:format("~p ~p ~p ~p\n", [S1,S2,A,B]),
    case Bin of
	<<A:S1,B:S2>> ->
	    io:format("~p ~p ~p ~p\n", [S1,S2,A,B]),
	    ok;
	_Other -> erlang:error(badmatch, [Bin,S1,S2,A,B])
    end.

more_dynamic(doc) -> "Extract integers at different alignments and of different sizes.";
more_dynamic(Config) when is_list(Config) ->

    % Unsigned big-endian numbers.
    Unsigned  = fun(Bin, List, SkipBef, N) ->
			SkipAft = 8*size(Bin) - N - SkipBef,
			<<_:SkipBef,Int:N,_:SkipAft>> = Bin,
			Int = make_int(List, N, 0)
		end,
    ?line more_dynamic1(Unsigned, funny_binary(42)),

    %% Signed big-endian numbers.
    Signed  = fun(Bin, List, SkipBef, N) ->
		      SkipAft = 8*size(Bin) - N - SkipBef,
		      <<_:SkipBef,Int:N/signed,_:SkipAft>> = Bin,
		      case make_signed_int(List, N) of
			  Int -> ok;
			  Other ->
			      io:format("Bin = ~p,", [Bin]),
			      io:format("SkipBef = ~p, N = ~p", [SkipBef,N]),
			      io:format("Expected ~p, got ~p", [Int,Other]),
			      ?t:fail()
		      end
	      end,
    ?line more_dynamic1(Signed, funny_binary(43)),

    %% Unsigned little-endian numbers.
    UnsLittle  = fun(Bin, List, SkipBef, N) ->
			 SkipAft = 8*size(Bin) - N - SkipBef,
			 <<_:SkipBef,Int:N/little,_:SkipAft>> = Bin,
			 Int = make_int(big_to_little(List, N), N, 0)
		 end,
    ?line more_dynamic1(UnsLittle, funny_binary(44)),

    %% Signed little-endian numbers.
    SignLittle  = fun(Bin, List, SkipBef, N) ->
			  SkipAft = 8*size(Bin) - N - SkipBef,
			  <<_:SkipBef,Int:N/signed-little,_:SkipAft>> = Bin,
			  Little = big_to_little(List, N),
			  Int = make_signed_int(Little, N)
		  end,
    ?line more_dynamic1(SignLittle, funny_binary(45)),

    ok.

more_dynamic1(Action, Bin) ->
    BitList = bits_to_list(binary_to_list(Bin), 16#80),
    more_dynamic2(Action, Bin, BitList, 0).

more_dynamic2(Action, Bin, [_|T]=List, Bef) ->
    more_dynamic3(Action, Bin, List, Bef, size(Bin)*8),
    more_dynamic2(Action, Bin, T, Bef+1);
more_dynamic2(_, _, [], _) -> ok.

more_dynamic3(Action, Bin, List, Bef, Aft) when Bef =< Aft ->
%%    io:format("~p, ~p", [Bef,Aft-Bef]),
    Action(Bin, List, Bef, Aft-Bef),
    more_dynamic3(Action, Bin, List, Bef, Aft-1);
more_dynamic3(_, _, _, _, _) -> ok.

big_to_little(List, N) -> big_to_little(List, N, []).

big_to_little([B0,B1,B2,B3,B4,B5,B6,B7|T], N, Acc) when N >= 8 ->
    big_to_little(T, N-8, [B0,B1,B2,B3,B4,B5,B6,B7|Acc]);
big_to_little(List, N, Acc) -> lists:sublist(List, 1, N) ++ Acc.

make_signed_int(_List, 0) -> 0;
make_signed_int([0|_]=List, N) -> make_int(List, N, 0);
make_signed_int([1|_]=List0, N) ->
    List1 = reversed_sublist(List0, N, []),
    List2 = two_complement_and_reverse(List1, 1, []),
    -make_int(List2, length(List2), 0).

reversed_sublist(_List, 0, Acc) -> Acc;
reversed_sublist([H|T], N, Acc) -> reversed_sublist(T, N-1, [H|Acc]).

two_complement_and_reverse([H|T], Carry, Acc) ->
    Sum = 1-H+Carry,
    two_complement_and_reverse(T, Sum div 2, [Sum rem 2|Acc]);
two_complement_and_reverse([], Carry, Acc) -> [Carry|Acc].

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([_|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([], _) -> [].

fun_clause({'EXIT',{function_clause,_}}) -> ok.
mkbin(L) when is_list(L) -> list_to_binary(L).

funny_binary(N) ->
    B0 = erlang:md5([N]),
    {B1,_B2} = split_binary(B0, byte_size(B0) div 3),
    B1.

mml(Config) when is_list(Config) ->
    ?line single_byte_binary = mml_choose(<<42>>),
    ?line multi_byte_binary = mml_choose(<<42,43>>).

mml_choose(<<_A:8>>) -> single_byte_binary;
mml_choose(<<_A:8,_T/binary>>) -> multi_byte_binary.

match_huge_int(Config) when is_list(Config) ->
    Sz = 1 bsl 27,
    ?line Bin = <<0:Sz,13:8>>,
    ?line skip_huge_int_1(Sz, Bin),
    ?line 0 = match_huge_int_1(Sz, Bin),

    %% Test overflowing the size of an integer field.
    ?line nomatch = overflow_huge_int_skip_32(Bin),
    case erlang:system_info(wordsize) of
	4 ->
	    ?line nomatch = overflow_huge_int_32(Bin);
	8 ->
	    %% An attempt will be made to allocate heap space for
	    %% the bignum (which will probably fail); only if the
	    %% allocation succeds will the matching fail because
	    %% the binary is too small.
	    ok
    end,
    ?line nomatch = overflow_huge_int_skip_64(Bin),
    ?line nomatch = overflow_huge_int_64(Bin),

    %% Test overflowing the size of an integer field using variables as sizes.
    ?line Sizes = case erlang:system_info(wordsize) of
		      4 -> lists:seq(25, 32);
		      8 -> []
		  end ++ lists:seq(50, 64),
    ?line ok = overflow_huge_int_unit128(Bin, Sizes),

    ok.

overflow_huge_int_unit128(Bin, [Sz0|Sizes]) ->
    Sz = id(1 bsl Sz0),
    case Bin of
	<<_:Sz/unit:128,0,_/binary>> ->
	    {error,Sz};
	_ ->
	    case Bin of
		<<Var:Sz/unit:128,0,_/binary>> ->
		    {error,Sz,Var};
		_ ->
		    overflow_huge_int_unit128(Bin, Sizes)
	    end
    end;
overflow_huge_int_unit128(_, []) -> ok.

match_huge_int_1(I, Bin) ->
    <<Int:I,13>> = Bin,
    Int.

skip_huge_int_1(I, Bin) ->
    <<_:I,13>> = Bin.

overflow_huge_int_skip_32(<<_:4294967296,0,_/binary>>) -> 1; % 1 bsl 32
overflow_huge_int_skip_32(<<_:33554432/unit:128,0,_/binary>>) -> 2; % 1 bsl 25
overflow_huge_int_skip_32(<<_:67108864/unit:64,0,_/binary>>) -> 3; % 1 bsl 26
overflow_huge_int_skip_32(<<_:134217728/unit:32,0,_/binary>>) -> 4; % 1 bsl 27
overflow_huge_int_skip_32(<<_:268435456/unit:16,0,_/binary>>) -> 5; % 1 bsl 28
overflow_huge_int_skip_32(<<_:536870912/unit:8,0,_/binary>>) -> 6; % 1 bsl 29
overflow_huge_int_skip_32(<<_:1073741824/unit:8,0,_/binary>>) -> 7; % 1 bsl 30
overflow_huge_int_skip_32(<<_:2147483648/unit:8,0,_/binary>>) -> 8; % 1 bsl 31
overflow_huge_int_skip_32(_) -> nomatch.

overflow_huge_int_32(<<Int:4294967296,_/binary>>) -> {1,Int}; % 1 bsl 32
overflow_huge_int_32(<<Int:33554432/unit:128,0,_/binary>>) -> {2,Int}; % 1 bsl 25
overflow_huge_int_32(<<Int:67108864/unit:128,0,_/binary>>) -> {3,Int}; % 1 bsl 26
overflow_huge_int_32(<<Int:134217728/unit:128,0,_/binary>>) -> {4,Int}; % 1 bsl 27
overflow_huge_int_32(<<Int:268435456/unit:128,0,_/binary>>) -> {5,Int}; % 1 bsl 28
overflow_huge_int_32(<<Int:536870912/unit:128,0,_/binary>>) -> {6,Int}; % 1 bsl 29
overflow_huge_int_32(<<Int:1073741824/unit:128,0,_/binary>>) -> {7,Int}; % 1 bsl 30
overflow_huge_int_32(<<Int:2147483648/unit:128,0,_/binary>>) -> {8,Int}; % 1 bsl 31
overflow_huge_int_32(_) -> nomatch.

overflow_huge_int_skip_64(<<_:18446744073709551616,_/binary>>) -> 1; % 1 bsl 64
overflow_huge_int_skip_64(<<_:144115188075855872/unit:128,0,_/binary>>) -> 2; % 1 bsl 57
overflow_huge_int_skip_64(<<_:288230376151711744/unit:64,0,_/binary>>) -> 3; % 1 bsl 58
overflow_huge_int_skip_64(<<_:576460752303423488/unit:32,0,_/binary>>) -> 4; % 1 bsl 59
overflow_huge_int_skip_64(<<_:1152921504606846976/unit:16,0,_/binary>>) -> 5; % 1 bsl 60
overflow_huge_int_skip_64(<<_:2305843009213693952/unit:8,0,_/binary>>) -> 6; % 1 bsl 61
overflow_huge_int_skip_64(<<_:4611686018427387904/unit:8,0,_/binary>>) -> 7; % 1 bsl 62
overflow_huge_int_skip_64(<<_:9223372036854775808/unit:8,0,_/binary>>) -> 8; % 1 bsl 63
overflow_huge_int_skip_64(_) -> nomatch.

overflow_huge_int_64(<<Int:18446744073709551616,_/binary>>) -> {1,Int}; % 1 bsl 64
overflow_huge_int_64(<<Int:144115188075855872/unit:128,0,_/binary>>) -> {2,Int}; % 1 bsl 57
overflow_huge_int_64(<<Int:288230376151711744/unit:128,0,_/binary>>) -> {3,Int}; % 1 bsl 58
overflow_huge_int_64(<<Int:576460752303423488/unit:128,0,_/binary>>) -> {4,Int}; % 1 bsl 59
overflow_huge_int_64(<<Int:1152921504606846976/unit:128,0,_/binary>>) -> {5,Int}; % 1 bsl 60
overflow_huge_int_64(<<Int:2305843009213693952/unit:128,0,_/binary>>) -> {6,Int}; % 1 bsl 61
overflow_huge_int_64(<<Int:4611686018427387904/unit:128,0,_/binary>>) -> {7,Int}; % 1 bsl 62
overflow_huge_int_64(<<Int:9223372036854775808/unit:128,0,_/binary>>) -> {8,Int}; % 1 bsl 63
overflow_huge_int_64(_) -> nomatch.

bignum(Config) when is_list(Config) ->
    ?line Bin = id(<<42,0:1024/unit:8,43>>),
    ?line <<42:1025/little-integer-unit:8,_:8>> = Bin,
    ?line <<_:8,43:1025/integer-unit:8>> = Bin,

    ?line BignumBin = id(<<0:512/unit:8,258254417031933722623:9/unit:8>>),
    ?line <<258254417031933722623:(512+9)/unit:8>> = BignumBin,
    erlang:garbage_collect(),			%Search for holes in debug-build.
    ok.

unaligned_32_bit(Config) when is_list(Config) ->
    %% There used to be a risk for heap overflow (fixed in R11B-5).
    ?line L = unaligned_32_bit_1(<<-1:(64*1024)>>),
    ?line unaligned_32_bit_verify(L, 1638).

unaligned_32_bit_1(<<1:1,U:32,_:7,T/binary>>) ->
    [U|unaligned_32_bit_1(T)];
unaligned_32_bit_1(_) ->
    [].

unaligned_32_bit_verify([], 0) -> ok;
unaligned_32_bit_verify([4294967295|T], N) when N > 0 ->
    unaligned_32_bit_verify(T, N-1).

id(I) -> I.