%% -*- erlang-indent-level: 2 -*- %%---------------------------------------------------------------------- %% %CopyrightBegin% %% %% Copyright Ericsson AB 2006-2014. 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 %% the License for the specific language governing rights and limitations %% under the License. %% %% %CopyrightEnd% %% %%%------------------------------------------------------------------- %%% File : dialyzer_plt.erl %%% Author : Tobias Lindahl <tobiasl@it.uu.se> %%% Description : Interface to display information in the persistent %%% lookup tables. %%% %%% Created : 23 Jul 2004 by Tobias Lindahl <tobiasl@it.uu.se> %%%------------------------------------------------------------------- -module(dialyzer_plt). -export([check_plt/3, compute_md5_from_files/1, contains_mfa/2, all_modules/1, delete_list/2, delete_module/2, included_files/1, from_file/1, get_default_plt/0, get_types/1, get_exported_types/1, %% insert/3, insert_list/2, insert_contract_list/2, insert_callbacks/2, insert_types/2, insert_exported_types/2, lookup/2, lookup_contract/2, lookup_callbacks/2, lookup_module/2, merge_plts/1, merge_plts_or_report_conflicts/2, new/0, plt_and_info_from_file/1, get_specs/1, get_specs/4, to_file/4, get_mini_plt/1, restore_full_plt/2 ]). %% Debug utilities -export([pp_non_returning/0, pp_mod/1]). -export_type([plt/0, plt_info/0]). %%---------------------------------------------------------------------- -type mod_deps() :: dialyzer_callgraph:mod_deps(). -type deep_string() :: string() | [deep_string()]. %% The following are used for searching the PLT when using the GUI %% (e.g. in show or search PLT contents). The user might be searching %% with a partial specification, in which case the missing items %% default to '_' -type arity_patt() :: '_' | arity(). -type mfa_patt() :: {module(), atom(), arity_patt()}. %%---------------------------------------------------------------------- -record(plt, {info = table_new() :: dict:dict(), types = table_new() :: dict:dict(), contracts = table_new() :: dict:dict(), callbacks = table_new() :: dict:dict(), exported_types = sets:new() :: sets:set()}). -record(mini_plt, {info :: ets:tid(), contracts :: ets:tid(), callbacks :: ets:tid() }). -opaque plt() :: #plt{} | #mini_plt{}. -include("dialyzer.hrl"). -type file_md5() :: {file:filename(), binary()}. -type plt_info() :: {[file_md5()], dict:dict()}. -record(file_plt, {version = "" :: string(), file_md5_list = [] :: [file_md5()], info = dict:new() :: dict:dict(), contracts = dict:new() :: dict:dict(), callbacks = dict:new() :: dict:dict(), types = dict:new() :: dict:dict(), exported_types = sets:new() :: sets:set(), mod_deps :: mod_deps(), implementation_md5 = [] :: [file_md5()]}). %%---------------------------------------------------------------------- -spec new() -> plt(). new() -> #plt{}. -spec delete_module(plt(), atom()) -> plt(). delete_module(#plt{info = Info, types = Types, contracts = Contracts, callbacks = Callbacks, exported_types = ExpTypes}, Mod) -> #plt{info = table_delete_module(Info, Mod), types = table_delete_module2(Types, Mod), contracts = table_delete_module(Contracts, Mod), callbacks = table_delete_module(Callbacks, Mod), exported_types = table_delete_module1(ExpTypes, Mod)}. -spec delete_list(plt(), [mfa() | integer()]) -> plt(). delete_list(#plt{info = Info, types = Types, contracts = Contracts, callbacks = Callbacks, exported_types = ExpTypes}, List) -> #plt{info = table_delete_list(Info, List), types = Types, contracts = table_delete_list(Contracts, List), callbacks = table_delete_list(Callbacks, List), exported_types = ExpTypes}. -spec insert_contract_list(plt(), dialyzer_contracts:plt_contracts()) -> plt(). insert_contract_list(#mini_plt{contracts = Contracts} = PLT, List) -> true = ets:insert(Contracts, List), PLT. -spec insert_callbacks(plt(), dialyzer_codeserver:codeserver()) -> plt(). insert_callbacks(#plt{callbacks = Callbacks} = Plt, Codeserver) -> List = dialyzer_codeserver:get_callbacks(Codeserver), Plt#plt{callbacks = table_insert_list(Callbacks, List)}. -spec lookup_contract(plt(), mfa_patt()) -> 'none' | {'value', #contract{}}. lookup_contract(#mini_plt{contracts = ETSContracts}, {M, F, _} = MFA) when is_atom(M), is_atom(F) -> ets_table_lookup(ETSContracts, MFA). -spec lookup_callbacks(plt(), module()) -> 'none' | {'value', [{mfa(), {{Filename::string(), Line::pos_integer()}, #contract{}}}]}. lookup_callbacks(#mini_plt{callbacks = ETSCallbacks}, Mod) when is_atom(Mod) -> ets_table_lookup(ETSCallbacks, Mod). -type ret_args_types() :: {erl_types:erl_type(), [erl_types:erl_type()]}. -spec insert_list(plt(), [{mfa() | integer(), ret_args_types()}]) -> plt(). insert_list(#mini_plt{info = Info} = PLT, List) -> true = ets:insert(Info, List), PLT. -spec lookup(plt(), integer() | mfa_patt()) -> 'none' | {'value', ret_args_types()}. lookup(Plt, {M, F, _} = MFA) when is_atom(M), is_atom(F) -> lookup_1(Plt, MFA); lookup(Plt, Label) when is_integer(Label) -> lookup_1(Plt, Label). lookup_1(#mini_plt{info = Info}, MFAorLabel) -> ets_table_lookup(Info, MFAorLabel). -spec insert_types(plt(), dict:dict()) -> plt(). insert_types(PLT, Rec) -> PLT#plt{types = Rec}. -spec insert_exported_types(plt(), sets:set()) -> plt(). insert_exported_types(PLT, Set) -> PLT#plt{exported_types = Set}. -spec get_types(plt()) -> dict:dict(). get_types(#plt{types = Types}) -> Types. -spec get_exported_types(plt()) -> sets:set(). get_exported_types(#plt{exported_types = ExpTypes}) -> ExpTypes. -type mfa_types() :: {mfa(), erl_types:erl_type(), [erl_types:erl_type()]}. -spec lookup_module(plt(), atom()) -> 'none' | {'value', [mfa_types()]}. lookup_module(#plt{info = Info}, M) when is_atom(M) -> table_lookup_module(Info, M). -spec all_modules(plt()) -> sets:set(). all_modules(#plt{info = Info, contracts = Cs}) -> sets:union(table_all_modules(Info), table_all_modules(Cs)). -spec contains_mfa(plt(), mfa()) -> boolean(). contains_mfa(#plt{info = Info, contracts = Contracts}, MFA) -> (table_lookup(Info, MFA) =/= none) orelse (table_lookup(Contracts, MFA) =/= none). -spec get_default_plt() -> file:filename(). get_default_plt() -> case os:getenv("DIALYZER_PLT") of false -> case os:getenv("HOME") of false -> plt_error("The HOME environment variable needs to be set " ++ "so that Dialyzer knows where to find the default PLT"); HomeDir -> filename:join(HomeDir, ".dialyzer_plt") end; UserSpecPlt -> UserSpecPlt end. -spec plt_and_info_from_file(file:filename()) -> {plt(), plt_info()}. plt_and_info_from_file(FileName) -> from_file(FileName, true). -spec from_file(file:filename()) -> plt(). from_file(FileName) -> from_file(FileName, false). from_file(FileName, ReturnInfo) -> case get_record_from_file(FileName) of {ok, Rec} -> case check_version(Rec) of error -> Msg = io_lib:format("Old PLT file ~s\n", [FileName]), plt_error(Msg); ok -> Plt = #plt{info = Rec#file_plt.info, types = Rec#file_plt.types, contracts = Rec#file_plt.contracts, callbacks = Rec#file_plt.callbacks, exported_types = Rec#file_plt.exported_types}, case ReturnInfo of false -> Plt; true -> PltInfo = {Rec#file_plt.file_md5_list, Rec#file_plt.mod_deps}, {Plt, PltInfo} end end; {error, Reason} -> Msg = io_lib:format("Could not read PLT file ~s: ~p\n", [FileName, Reason]), plt_error(Msg) end. -type err_rsn() :: 'not_valid' | 'no_such_file' | 'read_error'. -spec included_files(file:filename()) -> {'ok', [file:filename()]} | {'error', err_rsn()}. included_files(FileName) -> case get_record_from_file(FileName) of {ok, #file_plt{file_md5_list = Md5}} -> {ok, [File || {File, _} <- Md5]}; {error, _What} = Error -> Error end. check_version(#file_plt{version = ?VSN, implementation_md5 = ImplMd5}) -> case compute_new_md5(ImplMd5, [], []) of ok -> ok; {differ, _, _} -> error; {error, _} -> error end; check_version(#file_plt{}) -> error. get_record_from_file(FileName) -> case file:read_file(FileName) of {ok, Bin} -> try binary_to_term(Bin) of #file_plt{} = FilePLT -> {ok, FilePLT}; _ -> {error, not_valid} catch _:_ -> {error, not_valid} end; {error, enoent} -> {error, no_such_file}; {error, _} -> {error, read_error} end. -spec merge_plts([plt()]) -> plt(). merge_plts(List) -> {InfoList, TypesList, ExpTypesList, ContractsList, CallbacksList} = group_fields(List), #plt{info = table_merge(InfoList), types = table_merge(TypesList), exported_types = sets_merge(ExpTypesList), contracts = table_merge(ContractsList), callbacks = table_merge(CallbacksList) }. -spec merge_disj_plts([plt()]) -> plt(). merge_disj_plts(List) -> {InfoList, TypesList, ExpTypesList, ContractsList, CallbacksList} = group_fields(List), #plt{info = table_disj_merge(InfoList), types = table_disj_merge(TypesList), exported_types = sets_disj_merge(ExpTypesList), contracts = table_disj_merge(ContractsList), callbacks = table_disj_merge(CallbacksList) }. group_fields(List) -> InfoList = [Info || #plt{info = Info} <- List], TypesList = [Types || #plt{types = Types} <- List], ExpTypesList = [ExpTypes || #plt{exported_types = ExpTypes} <- List], ContractsList = [Contracts || #plt{contracts = Contracts} <- List], CallbacksList = [Callbacks || #plt{callbacks = Callbacks} <- List], {InfoList, TypesList, ExpTypesList, ContractsList, CallbacksList}. -spec merge_plts_or_report_conflicts([file:filename()], [plt()]) -> plt(). merge_plts_or_report_conflicts(PltFiles, Plts) -> try merge_disj_plts(Plts) catch throw:{dialyzer_error, not_disjoint_plts} -> IncFiles = lists:append([begin {ok, Fs} = included_files(F), Fs end || F <- PltFiles]), ConfFiles = find_duplicates(IncFiles), Msg = io_lib:format("Could not merge PLTs since they are not disjoint\n" "The following files are included in more than one " "PLTs:\n~p\n", [ConfFiles]), plt_error(Msg) end. find_duplicates(List) -> ModList = [filename:basename(E) || E <- List], SortedList = lists:usort(ModList), lists:usort(ModList -- SortedList). -spec to_file(file:filename(), plt(), mod_deps(), {[file_md5()], mod_deps()}) -> 'ok'. to_file(FileName, #plt{info = Info, types = Types, contracts = Contracts, callbacks = Callbacks, exported_types = ExpTypes}, ModDeps, {MD5, OldModDeps}) -> NewModDeps = dict:merge(fun(_Key, OldVal, NewVal) -> ordsets:union(OldVal, NewVal) end, OldModDeps, ModDeps), ImplMd5 = compute_implementation_md5(), Record = #file_plt{version = ?VSN, file_md5_list = MD5, info = Info, contracts = Contracts, callbacks = Callbacks, types = Types, exported_types = ExpTypes, mod_deps = NewModDeps, implementation_md5 = ImplMd5}, Bin = term_to_binary(Record, [compressed]), case file:write_file(FileName, Bin) of ok -> ok; {error, Reason} -> Msg = io_lib:format("Could not write PLT file ~s: ~w\n", [FileName, Reason]), throw({dialyzer_error, Msg}) end. -type md5_diff() :: [{'differ', atom()} | {'removed', atom()}]. -type check_error() :: err_rsn() | {'no_file_to_remove', file:filename()}. -spec check_plt(file:filename(), [file:filename()], [file:filename()]) -> 'ok' | {'error', check_error()} | {'differ', [file_md5()], md5_diff(), mod_deps()} | {'old_version', [file_md5()]}. check_plt(FileName, RemoveFiles, AddFiles) -> case get_record_from_file(FileName) of {ok, #file_plt{file_md5_list = Md5, mod_deps = ModDeps} = Rec} -> case check_version(Rec) of ok -> case compute_new_md5(Md5, RemoveFiles, AddFiles) of ok -> ok; {differ, NewMd5, DiffMd5} -> {differ, NewMd5, DiffMd5, ModDeps}; {error, _What} = Err -> Err end; error -> case compute_new_md5(Md5, RemoveFiles, AddFiles) of ok -> {old_version, Md5}; {differ, NewMd5, _DiffMd5} -> {old_version, NewMd5}; {error, _What} = Err -> Err end end; Error -> Error end. compute_new_md5(Md5, [], []) -> compute_new_md5_1(Md5, [], []); compute_new_md5(Md5, RemoveFiles0, AddFiles0) -> %% Assume that files are first removed and then added. Files that %% are both removed and added will be checked for consistency in the %% normal way. If they have moved, we assume that they differ. RemoveFiles = RemoveFiles0 -- AddFiles0, AddFiles = AddFiles0 -- RemoveFiles0, InitDiffList = init_diff_list(RemoveFiles, AddFiles), case init_md5_list(Md5, RemoveFiles, AddFiles) of {ok, NewMd5} -> compute_new_md5_1(NewMd5, [], InitDiffList); {error, _What} = Error -> Error end. compute_new_md5_1([{File, Md5} = Entry|Entries], NewList, Diff) -> case compute_md5_from_file(File) of Md5 -> compute_new_md5_1(Entries, [Entry|NewList], Diff); NewMd5 -> ModName = beam_file_to_module(File), compute_new_md5_1(Entries, [{File, NewMd5}|NewList], [{differ, ModName}|Diff]) end; compute_new_md5_1([], _NewList, []) -> ok; compute_new_md5_1([], NewList, Diff) -> {differ, lists:keysort(1, NewList), Diff}. -spec compute_implementation_md5() -> [file_md5()]. compute_implementation_md5() -> Dir = code:lib_dir(hipe), Files1 = ["erl_bif_types.beam", "erl_types.beam"], Files2 = [filename:join([Dir, "ebin", F]) || F <- Files1], compute_md5_from_files(Files2). -spec compute_md5_from_files([file:filename()]) -> [file_md5()]. compute_md5_from_files(Files) -> lists:keysort(1, [{F, compute_md5_from_file(F)} || F <- Files]). compute_md5_from_file(File) -> case filelib:is_regular(File) of false -> Msg = io_lib:format("Not a regular file: ~s\n", [File]), throw({dialyzer_error, Msg}); true -> case dialyzer_utils:get_abstract_code_from_beam(File) of error -> Msg = io_lib:format("Could not get abstract code for file: ~s (please recompile it with +debug_info)\n", [File]), throw({dialyzer_error, Msg}); {ok, Abs} -> erlang:md5(term_to_binary(Abs)) end end. init_diff_list(RemoveFiles, AddFiles) -> RemoveSet0 = sets:from_list([beam_file_to_module(F) || F <- RemoveFiles]), AddSet0 = sets:from_list([beam_file_to_module(F) || F <- AddFiles]), DiffSet = sets:intersection(AddSet0, RemoveSet0), RemoveSet = sets:subtract(RemoveSet0, DiffSet), %% Added files and diff files will appear as diff files from the md5 check. [{removed, F} || F <- sets:to_list(RemoveSet)]. init_md5_list(Md5, RemoveFiles, AddFiles) -> Files = [{remove, F} || F <- RemoveFiles] ++ [{add, F} || F <- AddFiles], DiffFiles = lists:keysort(2, Files), Md5Sorted = lists:keysort(1, Md5), init_md5_list_1(Md5Sorted, DiffFiles, []). init_md5_list_1([{File, _Md5}|Md5Left], [{remove, File}|DiffLeft], Acc) -> init_md5_list_1(Md5Left, DiffLeft, Acc); init_md5_list_1([{File, _Md5} = Entry|Md5Left], [{add, File}|DiffLeft], Acc) -> init_md5_list_1(Md5Left, DiffLeft, [Entry|Acc]); init_md5_list_1([{File1, _Md5} = Entry|Md5Left] = Md5List, [{Tag, File2}|DiffLeft] = DiffList, Acc) -> case File1 < File2 of true -> init_md5_list_1(Md5Left, DiffList, [Entry|Acc]); false -> %% Just an assert. true = File1 > File2, case Tag of add -> init_md5_list_1(Md5List, DiffLeft, [{File2, <<>>}|Acc]); remove -> {error, {no_file_to_remove, File2}} end end; init_md5_list_1([], DiffList, Acc) -> AddFiles = [{F, <<>>} || {add, F} <- DiffList], {ok, lists:reverse(Acc, AddFiles)}; init_md5_list_1(Md5List, [], Acc) -> {ok, lists:reverse(Acc, Md5List)}. -spec get_mini_plt(plt()) -> plt(). get_mini_plt(#plt{info = Info, contracts = Contracts, callbacks = Callbacks}) -> [ETSInfo, ETSContracts, ETSCallbacks] = [ets:new(Name, [public]) || Name <- [plt_info, plt_contracts, plt_callbacks]], CallbackList = dict:to_list(Callbacks), CallbacksByModule = [{M, [Cb || {{M1,_,_},_} = Cb <- CallbackList, M1 =:= M]} || M <- lists:usort([M || {{M,_,_},_} <- CallbackList])], [true, true] = [ets:insert(ETS, dict:to_list(Data)) || {ETS, Data} <- [{ETSInfo, Info}, {ETSContracts, Contracts}]], true = ets:insert(ETSCallbacks, CallbacksByModule), #mini_plt{info = ETSInfo, contracts = ETSContracts, callbacks = ETSCallbacks}; get_mini_plt(undefined) -> undefined. -spec restore_full_plt(plt(), plt()) -> plt(). restore_full_plt(#mini_plt{info = ETSInfo, contracts = ETSContracts}, Plt) -> Info = dict:from_list(ets:tab2list(ETSInfo)), Contracts = dict:from_list(ets:tab2list(ETSContracts)), ets:delete(ETSContracts), ets:delete(ETSInfo), Plt#plt{info = Info, contracts = Contracts}; restore_full_plt(undefined, undefined) -> undefined. %%--------------------------------------------------------------------------- %% Edoc -spec get_specs(plt()) -> string(). get_specs(#plt{info = Info}) -> %% TODO: Should print contracts as well. L = lists:sort([{MFA, Val} || {{_,_,_} = MFA, Val} <- table_to_list(Info)]), lists:flatten(create_specs(L, [])). beam_file_to_module(Filename) -> list_to_atom(filename:basename(Filename, ".beam")). -spec get_specs(plt(), atom(), atom(), arity_patt()) -> 'none' | string(). get_specs(#plt{info = Info}, M, F, A) when is_atom(M), is_atom(F) -> MFA = {M, F, A}, case table_lookup(Info, MFA) of none -> none; {value, Val} -> lists:flatten(create_specs([{MFA, Val}], [])) end. create_specs([{{M, F, _A}, {Ret, Args}}|Left], M) -> [io_lib:format("-spec ~w(~s) -> ~s\n", [F, expand_args(Args), erl_types:t_to_string(Ret)]) | create_specs(Left, M)]; create_specs(List = [{{M, _F, _A}, {_Ret, _Args}}| _], _M) -> [io_lib:format("\n\n%% ------- Module: ~w -------\n\n", [M]) | create_specs(List, M)]; create_specs([], _) -> []. expand_args([]) -> []; expand_args([ArgType]) -> case erl_types:t_is_any(ArgType) of true -> ["_"]; false -> [erl_types:t_to_string(ArgType)] end; expand_args([ArgType|Left]) -> [case erl_types:t_is_any(ArgType) of true -> "_"; false -> erl_types:t_to_string(ArgType) end ++ ","|expand_args(Left)]. -spec plt_error(deep_string()) -> no_return(). plt_error(Msg) -> throw({dialyzer_error, lists:flatten(Msg)}). %%--------------------------------------------------------------------------- %% Ets table table_new() -> dict:new(). table_to_list(Plt) -> dict:to_list(Plt). table_delete_module(Plt, Mod) -> dict:filter(fun({M, _F, _A}, _Val) -> M =/= Mod; (_, _) -> true end, Plt). table_delete_module1(Plt, Mod) -> sets:filter(fun({M, _F, _A}) -> M =/= Mod end, Plt). table_delete_module2(Plt, Mod) -> dict:filter(fun(M, _Val) -> M =/= Mod end, Plt). table_delete_list(Plt, [H|T]) -> table_delete_list(dict:erase(H, Plt), T); table_delete_list(Plt, []) -> Plt. table_insert_list(Plt, [{Key, Val}|Left]) -> table_insert_list(table_insert(Plt, Key, Val), Left); table_insert_list(Plt, []) -> Plt. table_insert(Plt, Key, {_Ret, _Arg} = Obj) -> dict:store(Key, Obj, Plt); table_insert(Plt, Key, #contract{} = C) -> dict:store(Key, C, Plt). table_lookup(Plt, Obj) -> case dict:find(Obj, Plt) of error -> none; {ok, Val} -> {value, Val} end. ets_table_lookup(Plt, Obj) -> try ets:lookup_element(Plt, Obj, 2) of Val -> {value, Val} catch _:_ -> none end. table_lookup_module(Plt, Mod) -> List = dict:fold(fun(Key, Val, Acc) -> case Key of {Mod, _F, _A} -> [{Key, element(1, Val), element(2, Val)}|Acc]; _ -> Acc end end, [], Plt), case List =:= [] of true -> none; false -> {value, List} end. table_all_modules(Plt) -> Fold = fun({M, _F, _A}, _Val, Acc) -> sets:add_element(M, Acc); (_, _, Acc) -> Acc end, dict:fold(Fold, sets:new(), Plt). table_merge([H|T]) -> table_merge(T, H). table_merge([], Acc) -> Acc; table_merge([Plt|Plts], Acc) -> NewAcc = dict:merge(fun(_Key, Val, Val) -> Val end, Plt, Acc), table_merge(Plts, NewAcc). table_disj_merge([H|T]) -> table_disj_merge(T, H). table_disj_merge([], Acc) -> Acc; table_disj_merge([Plt|Plts], Acc) -> case table_is_disjoint(Plt, Acc) of true -> NewAcc = dict:merge(fun(_Key, _Val1, _Val2) -> gazonk end, Plt, Acc), table_disj_merge(Plts, NewAcc); false -> throw({dialyzer_error, not_disjoint_plts}) end. table_is_disjoint(T1, T2) -> K1 = dict:fetch_keys(T1), K2 = dict:fetch_keys(T2), lists:all(fun(E) -> not lists:member(E, K2) end, K1). sets_merge([H|T]) -> sets_merge(T, H). sets_merge([], Acc) -> Acc; sets_merge([Plt|Plts], Acc) -> NewAcc = sets:union(Plt, Acc), sets_merge(Plts, NewAcc). sets_disj_merge([H|T]) -> sets_disj_merge(T, H). sets_disj_merge([], Acc) -> Acc; sets_disj_merge([Plt|Plts], Acc) -> case sets:is_disjoint(Plt, Acc) of true -> NewAcc = sets:union(Plt, Acc), sets_disj_merge(Plts, NewAcc); false -> throw({dialyzer_error, not_disjoint_plts}) end. %%--------------------------------------------------------------------------- %% Debug utilities. -spec pp_non_returning() -> 'ok'. pp_non_returning() -> PltFile = get_default_plt(), Plt = from_file(PltFile), List = table_to_list(Plt#plt.info), Unit = [{MFA, erl_types:t_fun(Args, Ret)} || {MFA, {Ret, Args}} <- List, erl_types:t_is_unit(Ret)], None = [{MFA, erl_types:t_fun(Args, Ret)} || {MFA, {Ret, Args}} <- List, erl_types:t_is_none(Ret)], io:format("=========================================\n"), io:format("= Loops =\n"), io:format("=========================================\n\n"), lists:foreach(fun({{M, F, _}, Type}) -> io:format("~w:~w~s.\n", [M, F, dialyzer_utils:format_sig(Type)]) end, lists:sort(Unit)), io:format("\n"), io:format("=========================================\n"), io:format("= Errors =\n"), io:format("=========================================\n\n"), lists:foreach(fun({{M, F, _}, Type}) -> io:format("~w:~w~s.\n", [M, F, dialyzer_utils:format_sig(Type)]) end, lists:sort(None)). -spec pp_mod(atom()) -> 'ok'. pp_mod(Mod) when is_atom(Mod) -> PltFile = get_default_plt(), Plt = from_file(PltFile), case lookup_module(Plt, Mod) of {value, List} -> lists:foreach(fun({{_, F, _}, Ret, Args}) -> T = erl_types:t_fun(Args, Ret), S = dialyzer_utils:format_sig(T), io:format("-spec ~w~s.\n", [F, S]) end, lists:sort(List)); none -> io:format("dialyzer: Found no module named '~s' in the PLT\n", [Mod]) end.