aboutsummaryrefslogtreecommitdiffstats
path: root/lib/dialyzer/src/dialyzer_coordinator.erl
blob: de239f5c930e54d0974cb169fb1b6adc3b6f30e5 (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
%% -*- erlang-indent-level: 2 -*-
%%
%% 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.

%%%-------------------------------------------------------------------
%%% File        : dialyzer_coordinator.erl
%%% Authors     : Stavros Aronis <[email protected]>
%%%-------------------------------------------------------------------

-module(dialyzer_coordinator).

%%% Export for dialyzer main process
-export([parallel_job/4]).

%%% Export for all possible workers
-export([job_done/3]).

%%% Exports for the typesig and dataflow analysis workers
-export([sccs_to_pids/2, request_activation/1]).

%%% Exports for the compilation workers
-export([get_next_label/2]).

-export_type([coordinator/0, mode/0, init_data/0, result/0, job/0]).

%%--------------------------------------------------------------------

-type collector()  :: pid().
-type regulator()  :: pid().
-type scc_to_pid() :: ets:tid() | 'unused'.

-opaque coordinator() :: {collector(), regulator(), scc_to_pid()}.
-type timing() :: dialyzer_timing:timing_server().

-type scc()     :: [mfa_or_funlbl()].
-type mode()    :: 'typesig' | 'dataflow' | 'compile' | 'warnings'.

-type compile_job()  :: file:filename().
-type typesig_job()  :: scc().
-type dataflow_job() :: module().
-type warnings_job() :: module().

-type job() :: compile_job() | typesig_job() | dataflow_job() | warnings_job().

-type compile_init_data()  :: dialyzer_analysis_callgraph:compile_init_data().
-type typesig_init_data()  :: dialyzer_succ_typings:typesig_init_data().
-type dataflow_init_data() :: dialyzer_succ_typings:dataflow_init_data().
-type warnings_init_data() :: dialyzer_succ_typings:warnings_init_data().

-type compile_result()  :: dialyzer_analysis_callgraph:compile_result().
-type typesig_result()  :: [mfa_or_funlbl()].
-type dataflow_result() :: [mfa_or_funlbl()].
-type warnings_result() :: [dial_warning()].

-type init_data() :: compile_init_data() | typesig_init_data() |
		     dataflow_init_data() | warnings_init_data().

-type result() :: compile_result() | typesig_result() |
		  dataflow_result() | warnings_result().

-type job_result() :: dialyzer_analysis_callgraph:one_file_mid_error() |
                      dialyzer_analysis_callgraph:one_file_result_ok() |
                      typesig_result() | dataflow_result() | warnings_result().

-record(state, {mode           :: mode(),
		active     = 0 :: integer(),
		result         :: result(),
		next_label = 0 :: integer(),
		init_data      :: init_data(),
		regulator      :: regulator(),
		scc_to_pid     :: scc_to_pid()
	       }).

-include("dialyzer.hrl").

%%--------------------------------------------------------------------

-spec parallel_job('compile', [compile_job()], compile_init_data(), timing()) ->
		      {compile_result(), integer()};
		  ('typesig', [typesig_job()], typesig_init_data(), timing()) ->
		      typesig_result();
		  ('dataflow', [dataflow_job()], dataflow_init_data(),
		   timing()) -> dataflow_result();
		  ('warnings', [warnings_job()], warnings_init_data(),
		   timing()) -> warnings_result().

parallel_job(Mode, Jobs, InitData, Timing) ->
  State = spawn_jobs(Mode, Jobs, InitData, Timing),
  collect_result(State).

spawn_jobs(Mode, Jobs, InitData, Timing) ->
  Collector = self(),
  Regulator = spawn_regulator(),
  TypesigOrDataflow = (Mode =:= 'typesig') orelse (Mode =:= 'dataflow'),
  SCCtoPID =
    case TypesigOrDataflow of
      true  -> ets:new(scc_to_pid, [{read_concurrency, true}]);
      false -> unused
    end,
  Coordinator = {Collector, Regulator, SCCtoPID},
  Fold =
    fun(Job, Count) ->
	Pid = dialyzer_worker:launch(Mode, Job, InitData, Coordinator),
	case TypesigOrDataflow of
	  true  -> true = ets:insert(SCCtoPID, {Job, Pid}), ok;
	  false -> ok
	end,
	Count + 1
    end,
  JobCount = lists:foldl(Fold, 0, Jobs),
  Unit =
    case Mode of
      'typesig'  -> "SCCs";
      _          -> "modules"
    end,
  dialyzer_timing:send_size_info(Timing, JobCount, Unit),
  InitResult =
    case Mode of
      'compile' -> dialyzer_analysis_callgraph:compile_init_result();
      _ -> []
    end,
  #state{mode = Mode, active = JobCount, result = InitResult, next_label = 0,
	 init_data = InitData, regulator = Regulator, scc_to_pid = SCCtoPID}.

collect_result(#state{mode = Mode, active = Active, result = Result,
		      next_label = NextLabel, init_data = InitData,
		      regulator = Regulator, scc_to_pid = SCCtoPID} = State) ->
  receive
    {next_label_request, Estimation, Pid} ->
      Pid ! {next_label_reply, NextLabel},
      collect_result(State#state{next_label = NextLabel + Estimation});
    {done, Job, Data} ->
      NewResult = update_result(Mode, InitData, Job, Data, Result),
      case Active of
	1 ->
	  kill_regulator(Regulator),
	  case Mode of
	    'compile' ->
	      {NewResult, NextLabel};
	    X when X =:= 'typesig'; X =:= 'dataflow' ->
	      ets:delete(SCCtoPID),
	      NewResult;
	    'warnings' ->
	      NewResult
	  end;
	N ->
	  collect_result(State#state{result = NewResult, active = N - 1})
      end
  end.

update_result(Mode, InitData, Job, Data, Result) ->
  case Mode of
    'compile' ->
      dialyzer_analysis_callgraph:add_to_result(Job, Data, Result,
						InitData);
    X when X =:= 'typesig'; X =:= 'dataflow' ->
      dialyzer_succ_typings:lookup_names(Data, InitData) ++ Result;
    'warnings' ->
      Data ++ Result
  end.

-spec sccs_to_pids([scc() | module()], coordinator()) ->
        [dialyzer_worker:worker()].

sccs_to_pids(SCCs, {_Collector, _Regulator, SCCtoPID}) ->
  Fold =
    fun(SCC, Pids) ->
        %% The SCCs that SCC depends on have always been started.
	Result = ets:lookup_element(SCCtoPID, SCC, 2),
        [Result|Pids]
    end,
  lists:foldl(Fold, [], SCCs).

-spec job_done(job(), job_result(), coordinator()) -> ok.

job_done(Job, Result, {Collector, Regulator, _SCCtoPID}) ->
  Regulator ! done,
  Collector ! {done, Job, Result},
  ok.

-spec get_next_label(integer(), coordinator()) -> integer().

get_next_label(EstimatedSize, {Collector, _Regulator, _SCCtoPID}) ->
  Collector ! {next_label_request, EstimatedSize, self()},
  receive
    {next_label_reply, NextLabel} -> NextLabel
  end.

-spec wait_activation() -> ok.

wait_activation() ->
  receive activate -> ok end.

activate_pid(Pid) ->
  Pid ! activate.

-spec request_activation(coordinator()) -> ok.

request_activation({_Collector, Regulator, _SCCtoPID}) ->
  Regulator ! {req, self()},
  wait_activation().

spawn_regulator() ->
  InitTickets = dialyzer_utils:parallelism(),
  spawn_link(fun() -> regulator_loop(InitTickets, queue:new()) end).

regulator_loop(Tickets, Queue) ->
  receive
    {req, Pid} ->
      case Tickets of
	0 ->
	  regulator_loop(0, queue:in(Pid, Queue));
	N ->
	  activate_pid(Pid),
	  regulator_loop(N-1, Queue)
      end;
    done ->
      {Waiting, NewQueue} = queue:out(Queue),
      NewTickets =
	case Waiting of
	  empty -> Tickets + 1;
	  {value, Pid} ->
	    activate_pid(Pid),
	    Tickets
	end,
      regulator_loop(NewTickets, NewQueue);
    stop -> ok
  end.

kill_regulator(Regulator) ->
  Regulator ! stop.