aboutsummaryrefslogtreecommitdiffstats
path: root/lib/compiler/test/receive_SUITE.erl
blob: 8cd864c59e4260935bd03ce3629633b8a2290724 (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
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2004-2018. 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%
%%
%%% Purpose : Compiles various modules with tough code

-module(receive_SUITE).

-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
	 init_per_group/2,end_per_group/2,
	 init_per_testcase/2,end_per_testcase/2,
	 export/1,recv/1,coverage/1,otp_7980/1,ref_opt/1,
	 wait/1,recv_in_try/1,double_recv/1,receive_var_zero/1,
         match_built_terms/1,elusive_common_exit/1]).

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

init_per_testcase(_Case, Config) ->
    Config.

end_per_testcase(_Case, _Config) ->
    ok.

suite() ->
    [{ct_hooks,[ts_install_cth]},
     {timetrap,{minutes,2}}].

all() -> 
    [{group,p}].

groups() -> 
    [{p,test_lib:parallel(),
      [recv,coverage,otp_7980,ref_opt,export,wait,
       recv_in_try,double_recv,receive_var_zero,
       match_built_terms,elusive_common_exit]}].


init_per_suite(Config) ->
    test_lib:recompile(?MODULE),
    Config.

end_per_suite(_Config) ->
    ok.

init_per_group(_GroupName, Config) ->
    Config.

end_per_group(_GroupName, Config) ->
    Config.

-record(state, {ena = true}).

recv(Config) when is_list(Config) ->
    Pid = spawn_link(fun() -> loop(#state{}) end),
    Self = self(),
    Pid ! {Self,test},
    receive
	{ok,test} -> ok;
	{error,Other} ->
	    io:format("Got unpexected ~p", [Other]),
	    ct:fail(unexpected)
    after 10000 ->
	    ct:fail(no_answer)
    end,
    receive
	X ->
	    io:format("Unexpected extra message: ~p", [X]),
	    ct:fail(unexpected)
    after 10 ->
	    ok
    end,
    ok.

loop(S) ->
    receive
	_ when S#state.ena == false ->
	    loop(S);
	{P,test} ->
	    P ! {ok,test},
	    loop(S);
	_X ->
	    loop(S)
    end.

coverage(Config) when is_list(Config) ->
    do_link(self()),
    do_unlink(self()),
    do_monitor_node(node(), true),
    do_monitor_node(node(), false),
    do_group_leader(group_leader(), self()),
    id(node(self())),

    erlang:'!'(self(), {a,10}),
    self() ! {b,20},
    [{a,10},{b,20}] = receive_all(),
    self() ! {c,42},
    receive
	{c,42} ->
	    ok
    after infinity ->
	    exit(cant_happen)
    end,

    self() ! 17,
    self() ! 19,
    59 = tuple_to_values(infinity, x),
    61 = tuple_to_values(999999, x),
    0 = tuple_to_values(1, x),

    {'EXIT',{{badmap,[]},_}} = (catch monitor_plus_badmap(self())),

    ok.

monitor_plus_badmap(Pid) ->
    monitor(process, Pid) + []#{}.

receive_all() ->
    receive
	Any ->
	    [Any|receive_all()]
    after 0 ->
	    []
    end.

do_monitor_node(Node, Bool) ->
    monitor_node(Node, Bool).

do_link(Pid) ->
    link(Pid).

do_unlink(Pid) ->
    unlink(Pid).

do_group_leader(Leader, Pid) ->
    group_leader(Leader, Pid).


%% cover sys_core_fold:tuple_to_values/2
tuple_to_values(infinity, X) ->
    {A,B} = case X of
		x ->
		    receive
			Any ->
			    {42,Any}
		    end
	    end,
    A+B;
tuple_to_values(Timeout, X) ->
    {A,B} = case X of
		x ->
		    receive
			Any ->
			    {42,Any}
		    after Timeout ->
			    {0,0}
		    end
	    end,
    A+B.

%% OTP-7980. Thanks to Vincent de Phily. The following code would
%% be inccorrectly optimized by beam_jump.

otp_7980(Config) when is_list(Config) ->
    7 = otp_7980_add_clients(10),
    ok.

otp_7980_add_clients(Count) ->
    Timeout = 42,
    lists:foldl(fun(_, N) ->
			case N of
                           1 -> ok;
			    _ -> receive after Timeout -> ok end
			end,
			N - 1
		end, Count, [1,2,3]).

ref_opt(Config) when is_list(Config) ->
    case ?MODULE of
	receive_SUITE -> ref_opt_1(Config);
	_ -> {skip,"Enough to run this case once."}
    end.

ref_opt_1(Config) ->
    DataDir = proplists:get_value(data_dir, Config),
    PrivDir = proplists:get_value(priv_dir, Config),
    Sources = filelib:wildcard(filename:join([DataDir,"ref_opt","*.{erl,S}"])),
    test_lib:p_run(fun(Src) ->
			   do_ref_opt(Src, PrivDir)
		   end, Sources),
    cover_recv_instructions(),
    ok.

do_ref_opt(Source, PrivDir) ->
    try
	Ext = filename:extension(Source),
	{ok,Mod} = compile:file(Source, [report_errors,report_warnings,
					 {outdir,PrivDir}] ++
					[from_asm || Ext =:= ".S" ]),
	Base = filename:rootname(filename:basename(Source), Ext),
	code:purge(list_to_atom(Base)),
	BeamFile = filename:join(PrivDir, Base),
	code:load_abs(BeamFile),
	ok = Mod:Mod(),
	{beam_file,Mod,_,_,_,Code} = beam_disasm:file(BeamFile),
	case Base of
	    "no_"++_ ->
		[] = collect_recv_opt_instrs(Code);
	    "yes_"++_ ->
		[{recv_mark,{f,L}},{recv_set,{f,L}}] =
		    collect_recv_opt_instrs(Code)
	end,
	ok
    catch Class:Error:Stk ->
	    io:format("~s: ~p ~p\n~p\n", [Source,Class,Error,Stk]),
	    error
    end.

collect_recv_opt_instrs(Code) ->
    L = [ [I || I <- Is,
		begin
		    case I of
			{recv_mark,{f,_}} -> true;
			{recv_set,{f,_}} -> true;
			_ -> false
		    end
		end] || {function,_,_,_,Is} <- Code],
    lists:append(L).

cover_recv_instructions() ->
    %% We want to cover the handling of recv_mark and recv_set in beam_utils.
    %% Since those instructions are introduced in a late optimization pass,
    %% beam_utils:live_opt() will not see them unless the compilation is
    %% started from a .S file. The compile_SUITE:asm/1 test case will
    %% compile all test suite files to .S and then run them through the
    %% compiler again.
    %%
    %% Here will we will ensure that this modules contains recv_mark
    %% and recv_set instructions.
    Pid = spawn_link(fun() ->
			     receive {Parent,Ref} ->
				     Parent ! Ref
			     end
		     end),
    Ref = make_ref(),
    Pid ! {self(),Ref},
    receive
	Ref -> ok
    end.

export(Config) when is_list(Config) ->
    Ref = make_ref(),
    self() ! {result,Ref,42},
    42 = export_1(Ref),
    {error,timeout} = export_1(Ref),

    self() ! {result,Ref},
    {ok,Ref} = export_2(),

    ok.

export_1(Reference) ->
    id(Reference),
    receive
	{result,Reference,Result} ->
	    Result
    after 1 ->
	    Result = {error,timeout}
    end,
    %% Result ({x,1}) is used, but not the return value ({x,0})
    %% of the receive. Used to be incorrectly optimized
    %% by beam_block.
    id({build,self()}),
    Result.

export_2() ->
    receive {result,Result} -> ok end,
    {ok,Result}.

wait(Config) when is_list(Config) ->
    self() ! <<42>>,
    <<42>> = wait_1(r, 1, 2),
    {1,2,3} = wait_1(1, 2, 3),
    {'EXIT',{timeout_value,_}} = (catch receive after [] -> timeout end),
    ok.

wait_1(r, _, _) ->
    receive
	B when byte_size(B) > 0 ->
	    B
    end;
%% beam_utils would wrongly assume that wait/1 could fall through
%% to the next clause.
wait_1(A, B, C) ->
    {A,B,C}.

recv_in_try(_Config) ->
    self() ! {ok,fh}, {ok,fh} = recv_in_try(infinity, native),
    self() ! {ok,ignored}, {ok,42} = recv_in_try(infinity, plain),
    self() ! {error,ignored}, nok = recv_in_try(infinity, plain),
    timeout = recv_in_try(1, plain),
    ok.

recv_in_try(Timeout, Format) ->
    try
	receive
	    {Status,History} ->
                %% {test,is_tuple,{f,148},[{x,0}]}.
                %% {test,test_arity,{f,148},[{x,0},2]}.
                %% {get_tuple_element,{x,0},0,{y,1}}.  %y1 is fragile.
                %%
                %% %% Here the fragility of y1 would be be progated to
                %% %% the 'catch' below. Incorrect, since get_tuple_element
                %% %% can't fail.
                %% {get_tuple_element,{x,0},1,{x,2}}.
                %%
                %% remove_message.                     %y1 fragility cleared.
		FH = case Format of
			native ->
                             id(History);
			plain ->
                             id(42)
		    end,
		case Status of
		    ok ->
			{ok,FH};
		    error ->
			nok
		end
	after Timeout ->
		timeout
	end
    catch
        %% The fragility of y1 incorrectly propagated to here.
        %% beam_validator would complain.
	throw:{error,Reason} ->
	    {nok,Reason}
    end.

%% ERL-703. The compiler would crash because beam_utils:anno_defs/1
%% failed to take into account that code after loop_rec_end is
%% unreachable.

double_recv(_Config) ->
    self() ! {more,{a,term}},
    ok = do_double_recv({more,{a,term}}, any),
    self() ! message,
    ok = do_double_recv(whatever, message),

    error = do_double_recv({more,42}, whatever),
    error = do_double_recv(whatever, whatever),
    ok.

do_double_recv({more, Rest}, _Msg) ->
    receive
        {more, Rest} ->
            ok
    after 0 ->
            error
    end;
do_double_recv(_, Msg) ->
    receive
        Msg ->
            ok
    after 0 ->
            error
    end.

%% Test 'after Z', when Z =:= 0 been propagated as an immediate by the type
%% optimization pass.
receive_var_zero(Config) when is_list(Config) ->
    self() ! x,
    self() ! y,
    Z = zero(),
    timeout = receive
                  z -> ok
              after Z -> timeout
              end,
    timeout = receive
              after Z -> timeout
              end,
    self() ! w,
    receive
	x -> ok;
	Other ->
	    ct:fail({bad_message,Other})
    end.

zero() -> 0.

%% ERL-862; the validator would explode when a term was constructed in a
%% receive guard.

-define(MATCH_BUILT_TERM(Ref, Expr),
        (fun() ->
                 Ref = make_ref(),
                 A = id($a),
                 B = id($b),
                 Built = id(Expr),
                 self() ! {Ref, A, B},
                 receive
                     {Ref, A, B} when Expr =:= Built ->
                         ok
                 after 5000 ->
                     ct:fail("Failed to match message with term built in "
                             "receive guard.")
                 end
         end)()).

match_built_terms(Config) when is_list(Config) ->
    ?MATCH_BUILT_TERM(Ref, [A, B]),
    ?MATCH_BUILT_TERM(Ref, {A, B}),
    ?MATCH_BUILT_TERM(Ref, <<A, B>>),
    ?MATCH_BUILT_TERM(Ref, #{ 1 => A, 2 => B}).

elusive_common_exit(_Config) ->
    self() ! {1, a},
    self() ! {2, b},
    {[z], [{2,b},{1,a}]} = elusive_loop([x,y,z], 2, []),

    CodeServer = whereis(code_server),
    Self = self(),
    Self ! {Self, abc},
    Self ! {CodeServer, []},
    Self ! {Self, other},
    try elusive2([]) of
        Unexpected ->
            ct:fail("Expected an exception; got ~p\n", [Unexpected])
    catch
        throw:[other, CodeServer, Self] ->
            ok
    end,

    ok.

elusive_loop(List, 0, Results) ->
    {List, Results};
elusive_loop(List, ToReceive, Results) ->
    {Result, RemList} =
        receive
            {_Pos, _R} = Res when List =/= [] ->
                [_H|T] = List,
                {Res, T};
            {_Pos, _R} = Res when List =:= [] ->
                {Res, []}
        end,
    %% beam_ssa_pre_codegen:fix_receives() would fail to find
    %% the common exit block for this receive. That would mean
    %% that it would not insert all necessary copy instructions.
    elusive_loop(RemList, ToReceive-1, [Result | Results]).


elusive2(Acc) ->
    receive
        {Pid, abc} ->
            ok;
        {Pid, []} ->
            ok;
        {Pid, Res} ->
            %% beam_ssa_pre_codegen:find_loop_exit/2 attempts to find
            %% the first block of the common code after the receive
            %% statement. It used to only look at the two last clauses
            %% of the receive. In this function, the last two clauses
            %% don't have any common block, so it would be assumed
            %% that there was no common block for any of the
            %% clauses. That would mean that copy instructions would
            %% not be inserted as needed.
            throw([Res | Acc])
    end,
    %% Common code.
    elusive2([Pid | Acc]).

id(I) -> I.