%% -*- erlang-indent-level: 2 -*-
%%-----------------------------------------------------------------------
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2006-2016. 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%
%%
%%%-------------------------------------------------------------------
%%% 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()], [scc() | module()]}.
sccs_to_pids(SCCs, {_Collector, _Regulator, SCCtoPID}) ->
Fold =
fun(SCC, {Pids, Unknown}) ->
try ets:lookup_element(SCCtoPID, SCC, 2) of
Result -> {[Result|Pids], Unknown}
catch
_:_ -> {Pids, [SCC|Unknown]}
end
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.
