%% -*- erlang-indent-level: 2 -*-
%%-----------------------------------------------------------------------
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2006-2011. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
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%% under the License.
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%%
%%%-------------------------------------------------------------------
%%% File : dialyzer_coordinator.erl
%%% Authors : Stavros Aronis <[email protected]>
%%%
%%% Description:
%%%
%%% The parallel version of Dialyzer's typesig analysis is spread over 4 modules
%%% with the intention to both minimize the changes on the original code and use
%%% a separate module for every kind of Erlang process that will be running.
%%%
%%% There are therefore 3 kinds of processes:
%%%
%%% - The original Dialyzer backend (in succ_typings module)
%%% - The worker process for the typesig analysis (in typesig and
%%% worker)
%%% - A coordinator of the worker processes (in coordinator)
%%%
%%% Operation guidelines:
%%%
%%% - The backend requests from the coordinator to spawn a worker for each SCC
%%% - The backend notifies the coordinator when all SCC have been spawned and
%%% waits for the server to report that the PLT has been updated
%%% - Each worker is responsible to notify all those who wait for it.
%%%
%%%-------------------------------------------------------------------
-module(dialyzer_coordinator).
%%% Exports for all possible uses of coordinator from main process
-export([start/2,
all_spawned/1]).
%%% Exports for all possible workers
-export([job_done/3]).
%%% Export for the typesig, dataflow and warnings main process
-export([scc_spawn/2]).
%%% Export for the typesig and dataflow analysis main process
-export([receive_not_fixpoint/0]).
%%% Export for warning main process
-export([receive_warnings/0]).
%%% Exports for the typesig and dataflow analysis workers
-export([sccs_to_pids/1]).
%%% Exports for the compilation main process
-export([compiler_spawn/2,
receive_compilation_data/0]).
%%% Exports for the compilation workers
-export([compilation_done/3,
get_next_label/2]).
-export_type([coordinator/0, mode/0]).
-behaviour(gen_server).
-export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2,
code_change/3]).
%%--------------------------------------------------------------------
-define(MAP, dialyzer_coordinator_map).
-type coordinator() :: pid(). %%opaque
-type scc() :: [mfa_or_funlbl()] | module().
-type mode() :: 'typesig' | 'dataflow' | 'compile' | 'warnings'.
-type servers() :: dialyzer_succ_typings:servers() |
dialyzer_analysis_callgraph:servers() |
dialyzer_succ_typings:warning_servers().
-record(state, {parent :: pid(),
mode :: mode(),
spawn_count = 0 :: integer(),
all_spawned = false :: boolean(),
next_label :: integer(),
result :: [mfa_or_funlbl()] |
dialyzer_analysis_callgraph:result() |
[dial_warning()],
init_job_data :: servers()
}).
-include("dialyzer.hrl").
%%--------------------------------------------------------------------
-spec start(mode(), servers()) -> coordinator().
start(Mode, Servers) ->
{ok, Pid} = gen_server:start(?MODULE, {self(), Mode, Servers}, []),
Pid.
-spec scc_spawn(scc() | module(), coordinator()) -> ok.
scc_spawn(SCC, Coordinator) ->
cast({scc_spawn, SCC}, Coordinator).
-spec sccs_to_pids([scc()]) -> {[dialyzer_worker:worker()], [scc()]}.
sccs_to_pids(SCCs) ->
lists:foldl(fun pid_partition/2, {[], []}, SCCs).
pid_partition(SCC, {Pids, Unknown}) ->
try ets:lookup_element(?MAP, SCC, 2) of
Result -> {[Result|Pids], Unknown}
catch
_:_ -> {Pids, [SCC|Unknown]}
end.
-spec job_done(scc() | file:filename(), term(), coordinator()) -> ok.
job_done(Job, Result, Coordinator) ->
cast({done, Job, Result}, Coordinator).
-spec compilation_done(file:filename(),
dialyzer_analysis_callgraph:compilation_data(),
coordinator()) -> ok.
compilation_done(Filename, CompilationData, Coordinator) ->
cast({done, Filename, CompilationData}, Coordinator).
-spec all_spawned(coordinator()) -> ok.
all_spawned(Coordinator) ->
cast(all_spawned, Coordinator).
send_done_to_parent(#state{mode = Mode,
parent = Parent,
result = Result,
next_label = NextLabel}) ->
Msg =
case Mode of
X when X =:= 'typesig'; X =:= 'dataflow' -> {not_fixpoint, Result};
'compile' -> {compilation_data, Result, NextLabel};
'warnings' -> {warnings, Result}
end,
Parent ! Msg,
ok.
-spec receive_not_fixpoint() -> [mfa_or_funlbl()].
receive_not_fixpoint() ->
receive {not_fixpoint, NotFixpoint} -> NotFixpoint end.
-spec receive_compilation_data() ->
{dialyzer_analysis_callgraph:result(), integer()}.
receive_compilation_data() ->
receive {compilation_data, CompilationData, NextLabel} ->
{CompilationData, NextLabel}
end.
-spec receive_warnings() -> [dial_warning()].
receive_warnings() ->
receive {warnings, Warnings} -> Warnings end.
-spec compiler_spawn(file:filename(), coordinator()) -> ok.
compiler_spawn(Filename, Coordinator) ->
cast({compiler_spawn, Filename}, Coordinator).
-spec get_next_label(integer(), coordinator()) -> integer().
get_next_label(EstimatedSize, Coordinator) ->
call({get_next_label, EstimatedSize}, Coordinator).
%%--------------------------------------------------------------------
-spec init({pid(), mode(), servers()}) -> {ok, #state{}}.
init({Parent, Mode, InitJobData}) ->
InitState = #state{parent = Parent, mode = Mode, init_job_data = InitJobData},
State =
case Mode of
X when X =:= 'typesig'; X =:= 'dataflow' ->
?MAP = ets:new(?MAP, [named_table, {read_concurrency, true}]),
InitState#state{result = []};
'warnings' ->
InitState#state{result = []};
'compile' ->
InitResult = dialyzer_analysis_callgraph:compile_coordinator_init(),
InitState#state{result = InitResult, next_label = 0}
end,
{ok, State}.
-spec handle_call(Query::term(), From::term(), #state{}) ->
{reply, Reply::term(), #state{}}.
handle_call({get_next_label, EstimatedSize}, _From,
#state{next_label = NextLabel} = State) ->
{reply, NextLabel, State#state{next_label = NextLabel + EstimatedSize}}.
-spec handle_cast(Msg::term(), #state{}) ->
{noreply, #state{}} | {stop, normal, #state{}}.
handle_cast({done, Job, NewData},
#state{mode = Mode,
spawn_count = SpawnCount,
all_spawned = AllSpawned,
result = OldResult,
init_job_data = Servers
} = State) ->
NewResult =
case Mode of
X when X =:= 'typesig'; X =:= 'dataflow' ->
FinalData = dialyzer_succ_typings:lookup_names(NewData, Servers),
ordsets:union(OldResult, FinalData);
'compile' ->
dialyzer_analysis_callgraph:add_to_result(Job, NewData, OldResult);
'warnings' ->
NewData ++ OldResult
end,
UpdatedState = State#state{result = NewResult},
Action =
case AllSpawned of
false -> reduce;
true ->
case SpawnCount of
1 -> finish;
_ -> reduce
end
end,
case Action of
reduce ->
NewState = UpdatedState#state{spawn_count = SpawnCount - 1},
{noreply, NewState};
finish ->
send_done_to_parent(UpdatedState),
{stop, normal, State}
end;
handle_cast(all_spawned, #state{spawn_count = SpawnCount} = State) ->
case SpawnCount of
0 ->
send_done_to_parent(State),
{stop, normal, State};
_ ->
NewState = State#state{all_spawned = true},
{noreply, NewState}
end;
handle_cast({scc_spawn, SCC},
#state{mode = Mode,
init_job_data = Servers,
spawn_count = SpawnCount} = State) ->
Pid = dialyzer_worker:launch(Mode, SCC, Servers, self()),
case Mode of
X when X =:= 'typesig'; X =:= 'dataflow' ->
true = ets:insert(?MAP, {SCC, Pid});
_ -> true
end,
{noreply, State#state{spawn_count = SpawnCount + 1}};
handle_cast({compiler_spawn, Filename},
#state{mode = Mode,
init_job_data = Servers,
spawn_count = SpawnCount
} = State) ->
dialyzer_worker:launch(Mode, Filename, Servers, self()),
{noreply,
State#state{spawn_count = SpawnCount + 1}
}.
-spec handle_info(term(), #state{}) -> {noreply, #state{}}.
handle_info(_Info, State) ->
{noreply, State}.
-spec terminate(term(), #state{}) -> ok.
terminate(_Reason, #state{mode = Mode}) ->
case Mode of
X when X =:= 'typesig'; X =:= 'dataflow' -> ets:delete(?MAP);
_ -> true
end,
ok.
-spec code_change(term(), #state{}, term()) -> {ok, #state{}}.
code_change(_OldVsn, State, _Extra) ->
{ok, State}.
%%--------------------------------------------------------------------
cast(Message, Coordinator) ->
gen_server:cast(Coordinator, Message).
call(Message, Coordinator) ->
gen_server:call(Coordinator, Message).
