File 0200-dialyzer-Fix-a-bug-regarding-contracts.patch of Package erlang
From 0d0799b4971e3353943614a311502cd4dd7b3ec9 Mon Sep 17 00:00:00 2001
From: Hans Bolinder <hasse@erlang.org>
Date: Tue, 5 Feb 2019 15:12:24 +0100
Subject: [PATCH] dialyzer: Fix a bug regarding contracts
See also https://bugs.erlang.org/browse/ERL-845.
Fix a bug that caused Dialyzer to crash when analyzing a contract with
a module name differing from the analyzed module's name. The bug was
introduced in Erlang/OTP 18.
---
lib/dialyzer/src/dialyzer_codeserver.erl | 8 +-
lib/dialyzer/src/dialyzer_contracts.erl | 130 ++++++++++++---------
lib/dialyzer/src/dialyzer_utils.erl | 37 +++---
.../small_SUITE_data/results/spec_other_module | 2 +
.../small_SUITE_data/src/spec_other_module.erl | 7 ++
5 files changed, 107 insertions(+), 77 deletions(-)
create mode 100644 lib/dialyzer/test/small_SUITE_data/results/spec_other_module
create mode 100644 lib/dialyzer/test/small_SUITE_data/src/spec_other_module.erl
diff --git a/lib/dialyzer/src/dialyzer_codeserver.erl b/lib/dialyzer/src/dialyzer_codeserver.erl
index 5587cf2bdf..c4e3c322e5 100644
--- a/lib/dialyzer/src/dialyzer_codeserver.erl
+++ b/lib/dialyzer/src/dialyzer_codeserver.erl
@@ -347,13 +347,11 @@ get_file_contract(Key, ContDict) ->
lookup_mfa_contract(MFA, #codeserver{contracts = ContDict}) ->
ets_dict_find(MFA, ContDict).
--spec lookup_meta_info(module() | mfa(), codeserver()) -> meta_info().
+-spec lookup_meta_info(module() | mfa(), codeserver()) ->
+ {'ok', meta_info()} | 'error'.
lookup_meta_info(MorMFA, #codeserver{fun_meta_info = FunMetaInfo}) ->
- case ets_dict_find(MorMFA, FunMetaInfo) of
- error -> [];
- {ok, PropList} -> PropList
- end.
+ ets_dict_find(MorMFA, FunMetaInfo).
-spec get_contracts(codeserver()) ->
dict:dict(mfa(), dialyzer_contracts:file_contract()).
diff --git a/lib/dialyzer/src/dialyzer_contracts.erl b/lib/dialyzer/src/dialyzer_contracts.erl
index af7f4385ad..9c36d745c3 100644
--- a/lib/dialyzer/src/dialyzer_contracts.erl
+++ b/lib/dialyzer/src/dialyzer_contracts.erl
@@ -25,7 +25,7 @@
%% get_contract_signature/1,
is_overloaded/1,
process_contract_remote_types/1,
- store_tmp_contract/5]).
+ store_tmp_contract/6]).
-export_type([file_contract/0, plt_contracts/0]).
@@ -146,18 +146,18 @@ process_contract_remote_types(CodeServer) ->
Mods = dialyzer_codeserver:all_temp_modules(CodeServer),
RecordTable = dialyzer_codeserver:get_records_table(CodeServer),
ExpTypes = dialyzer_codeserver:get_exported_types(CodeServer),
- ContractFun =
- fun({{_M, _F, _A}=MFA, {File, TmpContract, Xtra}}, C0) ->
- #tmp_contract{contract_funs = CFuns, forms = Forms} = TmpContract,
- {NewCs, C2} = lists:mapfoldl(fun(CFun, C1) ->
- CFun(ExpTypes, RecordTable, C1)
- end, C0, CFuns),
- Args = general_domain(NewCs),
- Contract = #contract{contracts = NewCs, args = Args, forms = Forms},
- {{MFA, {File, Contract, Xtra}}, C2}
- end,
ModuleFun =
fun(ModuleName) ->
+ ContractFun =
+ fun({MFA, {File, TmpContract, Xtra}}, C0) ->
+ #tmp_contract{contract_funs = CFuns, forms = Forms} = TmpContract,
+ {NewCs, C2} = lists:mapfoldl(fun(CFun, C1) ->
+ CFun(ExpTypes, RecordTable, C1)
+ end, C0, CFuns),
+ Args = general_domain(NewCs),
+ Contract = #contract{contracts = NewCs, args = Args, forms = Forms},
+ {{MFA, {File, Contract, Xtra}}, C2}
+ end,
Cache = erl_types:cache__new(),
{ContractMap, CallbackMap} =
dialyzer_codeserver:get_temp_contracts(ModuleName, CodeServer),
@@ -474,26 +474,29 @@ insert_constraints([], Map) -> Map.
-type spec_data() :: {TypeSpec :: [_], Xtra:: [_]}.
--spec store_tmp_contract(mfa(), file_line(), spec_data(), contracts(), types()) ->
- contracts().
+-spec store_tmp_contract(module(), mfa(), file_line(), spec_data(),
+ contracts(), types()) -> contracts().
-store_tmp_contract(MFA, FileLine, {TypeSpec, Xtra}, SpecMap, RecordsDict) ->
+store_tmp_contract(Module, MFA, FileLine, {TypeSpec, Xtra}, SpecMap,
+ RecordsDict) ->
%% io:format("contract from form: ~tp\n", [TypeSpec]),
- TmpContract = contract_from_form(TypeSpec, MFA, RecordsDict, FileLine),
+ TmpContract = contract_from_form(TypeSpec, Module, MFA, RecordsDict, FileLine),
%% io:format("contract: ~tp\n", [TmpContract]),
maps:put(MFA, {FileLine, TmpContract, Xtra}, SpecMap).
-contract_from_form(Forms, MFA, RecDict, FileLine) ->
- {CFuns, Forms1} = contract_from_form(Forms, MFA, RecDict, FileLine, [], []),
+contract_from_form(Forms, Module, MFA, RecDict, FileLine) ->
+ {CFuns, Forms1} =
+ contract_from_form(Forms, Module, MFA, RecDict, FileLine, [], []),
#tmp_contract{contract_funs = CFuns, forms = Forms1}.
-contract_from_form([{type, _, 'fun', [_, _]} = Form | Left], MFA, RecDict,
- FileLine, TypeAcc, FormAcc) ->
+contract_from_form([{type, _, 'fun', [_, _]} = Form | Left], Module, MFA,
+ RecDict, FileLine, TypeAcc, FormAcc) ->
TypeFun =
fun(ExpTypes, RecordTable, Cache) ->
{NewType, NewCache} =
try
- from_form_with_check(Form, ExpTypes, MFA, RecordTable, Cache)
+ from_form_with_check(Form, ExpTypes, Module, MFA, RecordTable,
+ Cache)
catch
throw:{error, Msg} ->
{File, Line} = FileLine,
@@ -506,68 +509,74 @@ contract_from_form([{type, _, 'fun', [_, _]} = Form | Left], MFA, RecDict,
end,
NewTypeAcc = [TypeFun | TypeAcc],
NewFormAcc = [{Form, []} | FormAcc],
- contract_from_form(Left, MFA, RecDict, FileLine, NewTypeAcc, NewFormAcc);
+ contract_from_form(Left, Module, MFA, RecDict, FileLine, NewTypeAcc,
+ NewFormAcc);
contract_from_form([{type, _L1, bounded_fun,
[{type, _L2, 'fun', [_, _]} = Form, Constr]}| Left],
- MFA, RecDict, FileLine, TypeAcc, FormAcc) ->
+ Module, MFA, RecDict, FileLine, TypeAcc, FormAcc) ->
TypeFun =
fun(ExpTypes, RecordTable, Cache) ->
{Constr1, VarTable, Cache1} =
- process_constraints(Constr, MFA, RecDict, ExpTypes, RecordTable,
- Cache),
+ process_constraints(Constr, Module, MFA, RecDict, ExpTypes,
+ RecordTable, Cache),
{NewType, NewCache} =
- from_form_with_check(Form, ExpTypes, MFA, RecordTable,
+ from_form_with_check(Form, ExpTypes, Module, MFA, RecordTable,
VarTable, Cache1),
NewTypeNoVars = erl_types:subst_all_vars_to_any(NewType),
{{NewTypeNoVars, Constr1}, NewCache}
end,
NewTypeAcc = [TypeFun | TypeAcc],
NewFormAcc = [{Form, Constr} | FormAcc],
- contract_from_form(Left, MFA, RecDict, FileLine, NewTypeAcc, NewFormAcc);
-contract_from_form([], _MFA, _RecDict, _FileLine, TypeAcc, FormAcc) ->
+ contract_from_form(Left, Module, MFA, RecDict, FileLine, NewTypeAcc,
+ NewFormAcc);
+contract_from_form([], _Mod, _MFA, _RecDict, _FileLine, TypeAcc, FormAcc) ->
{lists:reverse(TypeAcc), lists:reverse(FormAcc)}.
-process_constraints(Constrs, MFA, RecDict, ExpTypes, RecordTable, Cache) ->
- {Init0, NewCache} = initialize_constraints(Constrs, MFA, RecDict, ExpTypes,
- RecordTable, Cache),
+process_constraints(Constrs, Module, MFA, RecDict, ExpTypes, RecordTable,
+ Cache) ->
+ {Init0, NewCache} = initialize_constraints(Constrs, Module, MFA, RecDict,
+ ExpTypes, RecordTable, Cache),
Init = remove_cycles(Init0),
- constraints_fixpoint(Init, MFA, RecDict, ExpTypes, RecordTable, NewCache).
+ constraints_fixpoint(Init, Module, MFA, RecDict, ExpTypes, RecordTable,
+ NewCache).
-initialize_constraints(Constrs, MFA, RecDict, ExpTypes, RecordTable, Cache) ->
- initialize_constraints(Constrs, MFA, RecDict, ExpTypes, RecordTable,
+initialize_constraints(Constrs, Module, MFA, RecDict, ExpTypes, RecordTable,
+ Cache) ->
+ initialize_constraints(Constrs, Module, MFA, RecDict, ExpTypes, RecordTable,
Cache, []).
-initialize_constraints([], _MFA, _RecDict, _ExpTypes, _RecordTable,
+initialize_constraints([], _Module, _MFA, _RecDict, _ExpTypes, _RecordTable,
Cache, Acc) ->
{Acc, Cache};
-initialize_constraints([Constr|Rest], MFA, RecDict, ExpTypes, RecordTable,
- Cache, Acc) ->
+initialize_constraints([Constr|Rest], Module, MFA, RecDict, ExpTypes,
+ RecordTable, Cache, Acc) ->
case Constr of
{type, _, constraint, [{atom, _, is_subtype}, [Type1, Type2]]} ->
VarTable = erl_types:var_table__new(),
{T1, NewCache} =
- final_form(Type1, ExpTypes, MFA, RecordTable, VarTable, Cache),
+ final_form(Type1, ExpTypes, Module, MFA, RecordTable, VarTable, Cache),
Entry = {T1, Type2},
- initialize_constraints(Rest, MFA, RecDict, ExpTypes, RecordTable,
- NewCache, [Entry|Acc]);
+ initialize_constraints(Rest, Module, MFA, RecDict, ExpTypes,
+ RecordTable, NewCache, [Entry|Acc]);
{type, _, constraint, [{atom,_,Name}, List]} ->
N = length(List),
throw({error,
io_lib:format("Unsupported type guard ~tw/~w\n", [Name, N])})
end.
-constraints_fixpoint(Constrs, MFA, RecDict, ExpTypes, RecordTable, Cache) ->
+constraints_fixpoint(Constrs, Module, MFA, RecDict, ExpTypes, RecordTable,
+ Cache) ->
VarTable = erl_types:var_table__new(),
{VarTab, NewCache} =
- constraints_to_dict(Constrs, MFA, RecDict, ExpTypes, RecordTable,
+ constraints_to_dict(Constrs, Module, MFA, RecDict, ExpTypes, RecordTable,
VarTable, Cache),
- constraints_fixpoint(VarTab, MFA, Constrs, RecDict, ExpTypes,
+ constraints_fixpoint(VarTab, Module, MFA, Constrs, RecDict, ExpTypes,
RecordTable, NewCache).
-constraints_fixpoint(OldVarTab, MFA, Constrs, RecDict, ExpTypes,
+constraints_fixpoint(OldVarTab, Module, MFA, Constrs, RecDict, ExpTypes,
RecordTable, Cache) ->
{NewVarTab, NewCache} =
- constraints_to_dict(Constrs, MFA, RecDict, ExpTypes, RecordTable,
+ constraints_to_dict(Constrs, Module, MFA, RecDict, ExpTypes, RecordTable,
OldVarTab, Cache),
case NewVarTab of
OldVarTab ->
@@ -578,19 +587,23 @@ constraints_fixpoint(OldVarTab, MFA, Constrs, RecDict, ExpTypes,
FinalConstrs = maps:fold(Fun, [], NewVarTab),
{FinalConstrs, NewVarTab, NewCache};
_Other ->
- constraints_fixpoint(NewVarTab, MFA, Constrs, RecDict, ExpTypes,
+ constraints_fixpoint(NewVarTab, Module, MFA, Constrs, RecDict, ExpTypes,
RecordTable, NewCache)
end.
-final_form(Form, ExpTypes, MFA, RecordTable, VarTable, Cache) ->
- from_form_with_check(Form, ExpTypes, MFA, RecordTable, VarTable, Cache).
+final_form(Form, ExpTypes, Module, MFA, RecordTable, VarTable, Cache) ->
+ from_form_with_check(Form, ExpTypes, Module, MFA, RecordTable, VarTable,
+ Cache).
-from_form_with_check(Form, ExpTypes, MFA, RecordTable, Cache) ->
+from_form_with_check(Form, ExpTypes, Module, MFA, RecordTable, Cache) ->
VarTable = erl_types:var_table__new(),
- from_form_with_check(Form, ExpTypes, MFA, RecordTable, VarTable, Cache).
+ from_form_with_check(Form, ExpTypes, Module, MFA, RecordTable, VarTable,
+ Cache).
-from_form_with_check(Form, ExpTypes, MFA, RecordTable, VarTable, Cache) ->
- Site = {spec, MFA},
+from_form_with_check(Form, ExpTypes, Module, MFA, RecordTable, VarTable,
+ Cache) ->
+ {_, F, A} = MFA,
+ Site = {spec, {Module, F, A}},
C1 = erl_types:t_check_record_fields(Form, ExpTypes, Site, RecordTable,
VarTable, Cache),
%% The check costs some time, and with the assumption that contracts
@@ -598,22 +611,22 @@ from_form_with_check(Form, ExpTypes, MFA, RecordTable, VarTable, Cache) ->
%% erl_types:t_from_form_check_remote(Form, ExpTypes, MFA, RecordTable),
erl_types:t_from_form(Form, ExpTypes, Site, RecordTable, VarTable, C1).
-constraints_to_dict(Constrs, MFA, RecDict, ExpTypes, RecordTable,
+constraints_to_dict(Constrs, Module, MFA, RecDict, ExpTypes, RecordTable,
VarTab, Cache) ->
{Subtypes, NewCache} =
- constraints_to_subs(Constrs, MFA, RecDict, ExpTypes, RecordTable,
+ constraints_to_subs(Constrs, Module, MFA, RecDict, ExpTypes, RecordTable,
VarTab, Cache, []),
{insert_constraints(Subtypes), NewCache}.
-constraints_to_subs([], _MFA, _RecDict, _ExpTypes, _RecordTable,
+constraints_to_subs([], _Module, _MFA, _RecDict, _ExpTypes, _RecordTable,
_VarTab, Cache, Acc) ->
{Acc, Cache};
-constraints_to_subs([{T1, Form2}|Rest], MFA, RecDict, ExpTypes, RecordTable,
- VarTab, Cache, Acc) ->
+constraints_to_subs([{T1, Form2}|Rest], Module, MFA, RecDict, ExpTypes,
+ RecordTable, VarTab, Cache, Acc) ->
{T2, NewCache} =
- final_form(Form2, ExpTypes, MFA, RecordTable, VarTab, Cache),
+ final_form(Form2, ExpTypes, Module, MFA, RecordTable, VarTab, Cache),
NewAcc = [{subtype, T1, T2}|Acc],
- constraints_to_subs(Rest, MFA, RecDict, ExpTypes, RecordTable,
+ constraints_to_subs(Rest, Module, MFA, RecDict, ExpTypes, RecordTable,
VarTab, NewCache, NewAcc).
%% Replaces variables with '_' when necessary to break up cycles among
@@ -898,6 +911,7 @@ is_remote_types_related(Contract, CSig, Sig, MFA, RecDict) ->
t_from_forms_without_remote([{FType, []}], MFA, RecDict) ->
Site = {spec, MFA},
+ %% FIXME
Type1 = erl_types:t_from_form_without_remote(FType, Site, RecDict),
{ok, erl_types:subst_all_vars_to_any(Type1)};
t_from_forms_without_remote([{_FType, _Constrs}], _MFA, _RecDict) ->
diff --git a/lib/dialyzer/src/dialyzer_utils.erl b/lib/dialyzer/src/dialyzer_utils.erl
index abd89034f3..310301ee0b 100644
--- a/lib/dialyzer/src/dialyzer_utils.erl
+++ b/lib/dialyzer/src/dialyzer_utils.erl
@@ -450,8 +450,9 @@ get_spec_info([{Contract, Ln, [{Id, TypeSpec}]}|Left],
error ->
SpecData = {TypeSpec, Xtra},
NewActiveMap =
- dialyzer_contracts:store_tmp_contract(MFA, {File, Ln}, SpecData,
- ActiveMap, RecordsMap),
+ dialyzer_contracts:store_tmp_contract(ModName, MFA, {File, Ln},
+ SpecData, ActiveMap,
+ RecordsMap),
{NewSpecMap, NewCallbackMap} =
case Contract of
spec -> {NewActiveMap, CallbackMap};
@@ -599,24 +600,32 @@ collect_attribute([], _Tag, _File) ->
-spec is_suppressed_fun(mfa(), codeserver()) -> boolean().
is_suppressed_fun(MFA, CodeServer) ->
- lookup_fun_property(MFA, nowarn_function, CodeServer).
+ lookup_fun_property(MFA, nowarn_function, CodeServer, false).
-spec is_suppressed_tag(mfa() | module(), dial_warn_tag(), codeserver()) ->
boolean().
is_suppressed_tag(MorMFA, Tag, Codeserver) ->
- not lookup_fun_property(MorMFA, Tag, Codeserver).
-
-lookup_fun_property({M, _F, _A}=MFA, Property, CodeServer) ->
- MFAPropList = dialyzer_codeserver:lookup_meta_info(MFA, CodeServer),
- case proplists:get_value(Property, MFAPropList, no) of
- mod -> false; % suppressed in function
- func -> true; % requested in function
- no -> lookup_fun_property(M, Property, CodeServer)
+ not lookup_fun_property(MorMFA, Tag, Codeserver, true).
+
+lookup_fun_property({M, _F, _A}=MFA, Property, CodeServer, NoInfoReturn) ->
+ case dialyzer_codeserver:lookup_meta_info(MFA, CodeServer) of
+ error ->
+ lookup_fun_property(M, Property, CodeServer, NoInfoReturn);
+ {ok, MFAPropList} ->
+ case proplists:get_value(Property, MFAPropList, no) of
+ mod -> false; % suppressed in function
+ func -> true; % requested in function
+ no -> lookup_fun_property(M, Property, CodeServer, NoInfoReturn)
+ end
end;
-lookup_fun_property(M, Property, CodeServer) when is_atom(M) ->
- MPropList = dialyzer_codeserver:lookup_meta_info(M, CodeServer),
- proplists:is_defined(Property, MPropList).
+lookup_fun_property(M, Property, CodeServer, NoInfoReturn) when is_atom(M) ->
+ case dialyzer_codeserver:lookup_meta_info(M, CodeServer) of
+ error ->
+ NoInfoReturn;
+ {ok, MPropList} ->
+ proplists:is_defined(Property, MPropList)
+ end.
%% ============================================================================
%%
diff --git a/lib/dialyzer/test/small_SUITE_data/results/spec_other_module b/lib/dialyzer/test/small_SUITE_data/results/spec_other_module
new file mode 100644
index 0000000000..ab2e35cf55
--- /dev/null
+++ b/lib/dialyzer/test/small_SUITE_data/results/spec_other_module
@@ -0,0 +1,2 @@
+
+spec_other_module.erl:7: Contract for function that does not exist: lists:flatten/1
diff --git a/lib/dialyzer/test/small_SUITE_data/src/spec_other_module.erl b/lib/dialyzer/test/small_SUITE_data/src/spec_other_module.erl
new file mode 100644
index 0000000000..b36742b1bd
--- /dev/null
+++ b/lib/dialyzer/test/small_SUITE_data/src/spec_other_module.erl
@@ -0,0 +1,7 @@
+-module(spec_other_module).
+
+%% OTP-15562 and ERL-845. Example provided by Kostis.
+
+-type deep_list(A) :: [A | deep_list(A)].
+
+-spec lists:flatten(deep_list(A)) -> [A].
--
2.16.4
