File 2344-stdlib-Add-checks-of-the-dialyzer-attribut... of Package erlang

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File 2344-stdlib-Add-checks-of-the-dialyzer-attribute-to-the-l.patch of Package erlang

From 3dd15a193e4a5aea1dd100d6a4e5ad3401334dfe Mon Sep 17 00:00:00 2001
From: Hans Bolinder <hasse@erlang.org>
Date: Tue, 11 Apr 2017 13:06:50 +0200
Subject: [PATCH] stdlib: Add checks of the dialyzer attribute to the linter

The same checks are also performed by the Dialyzer.
---
 lib/dialyzer/doc/src/dialyzer.xml     |  7 +---
 lib/dialyzer/src/dialyzer_options.erl |  3 ++
 lib/dialyzer/test/plt_SUITE.erl       | 37 ++++++++++++++------
 lib/stdlib/src/erl_lint.erl           | 63 +++++++++++++++++++++++++++++++++--
 lib/stdlib/test/erl_lint_SUITE.erl    | 52 ++++++++++++++++++++++++++---
 5 files changed, 138 insertions(+), 24 deletions(-)

diff --git a/lib/dialyzer/doc/src/dialyzer.xml b/lib/dialyzer/doc/src/dialyzer.xml
index 4b7eb4ad6..e34ffd6de 100644
--- a/lib/dialyzer/doc/src/dialyzer.xml
+++ b/lib/dialyzer/doc/src/dialyzer.xml
@@ -4,7 +4,7 @@
 <erlref>
 <header>
 <copyright>
- <year>2006</year><year>2016</year>
+ <year>2006</year><year>2017</year>
 <holder>Ericsson AB. All Rights Reserved.</holder>
 </copyright>
 <legalnotice>
@@ -457,11 +457,6 @@ dialyzer --plts plt_1 ... plt_n -- files_to_analyze</code>
 <c>gui/1</c></seealso> below (<c>WarnOpts</c>).
 
 <note>
- Attribute <c>-dialyzer()</c> is not checked by the Erlang
- compiler, but by Dialyzer itself.
- </note>
-
- <note>
 Warning option <c>-Wrace_conditions</c> has no effect when
 set in source files.
 </note>
diff --git a/lib/dialyzer/src/dialyzer_options.erl b/lib/dialyzer/src/dialyzer_options.erl
index 616e8834f..ec3f41311 100644
--- a/lib/dialyzer/src/dialyzer_options.erl
+++ b/lib/dialyzer/src/dialyzer_options.erl
@@ -277,6 +277,9 @@ assert_solvers([Term|_]) ->
 
 -spec build_warnings([atom()], dial_warn_tags()) -> dial_warn_tags().
 
+%% The warning options are checked by the code linter.
+%% The function erl_lint:is_module_dialyzer_option/1 must
+%% be updated if options are added or removed.
 build_warnings([Opt|Opts], Warnings) ->
 NewWarnings =
 case Opt of
diff --git a/lib/stdlib/src/erl_lint.erl b/lib/stdlib/src/erl_lint.erl
index 0789f5dfb..78b7a0e75 100644
--- a/lib/stdlib/src/erl_lint.erl
+++ b/lib/stdlib/src/erl_lint.erl
@@ -404,6 +404,10 @@ format_error({not_exported_opaque, {TypeName, Arity}}) ->
 format_error({underspecified_opaque, {TypeName, Arity}}) ->
 io_lib:format("opaque type ~w~s is underspecified and therefore meaningless",
 [TypeName, gen_type_paren(Arity)]);
+format_error({bad_dialyzer_attribute,Term}) ->
+ io_lib:format("badly formed dialyzer attribute: ~w", [Term]);
+format_error({bad_dialyzer_option,Term}) ->
+ io_lib:format("unknown dialyzer warning option: ~w", [Term]);
 %% --- obsolete? unused? ---
 format_error({format_error, {Fmt, Args}}) ->
 io_lib:format(Fmt, Args).
@@ -796,8 +800,7 @@ attribute_state(Form, St) ->
 %% State'
 %% Allow for record, type and opaque type definitions and spec
 %% declarations to be intersperced within function definitions.
-%% Dialyzer attributes are also allowed everywhere, but are not
-%% checked at all.
+%% Dialyzer attributes are also allowed everywhere.
 
 function_state({attribute,L,record,{Name,Fields}}, St) ->
 record_def(L, Name, Fields, St);
@@ -883,7 +886,8 @@ post_traversal_check(Forms, St0) ->
 StD = check_on_load(StC),
 StE = check_unused_records(Forms, StD),
 StF = check_local_opaque_types(StE),
- check_callback_information(StF).
+ StG = check_dialyzer_attribute(Forms, StF),
+ check_callback_information(StG).
 
 %% check_behaviour(State0) -> State
 %% Check that the behaviour attribute is valid.
@@ -3116,6 +3120,59 @@ check_local_opaque_types(St) ->
 end,
 dict:fold(FoldFun, St, Ts).
 
+check_dialyzer_attribute(Forms, St0) ->
+ Vals = [{L,V} ||
+ {attribute,L,dialyzer,Val} <- Forms,
+ V0 <- lists:flatten([Val]),
+ V <- case V0 of
+ {O,F} ->
+ [{A,B} ||
+ A <- lists:flatten([O]),
+ B <- lists:flatten([F])];
+ T -> [T]
+ end],
+ {Wellformed, Bad} =
+ lists:partition(fun ({_,{Option,FA}}) when is_atom(Option) ->
+ is_fa(FA);
+ ({_,Option}) when is_atom(Option) -> true;
+ (_) -> false
+ end, Vals),
+ St1 = foldl(fun ({L,Term}, St) ->
+		 add_error(L, {bad_dialyzer_attribute,Term}, St)
+	 end, St0, Bad),
+ DefFunctions = (gb_sets:to_list(St0#lint.defined) -- pseudolocals()),
+ Fun = fun ({L,{Option,FA}}, St) ->
+ case is_function_dialyzer_option(Option) of
+ true ->
+ case lists:member(FA, DefFunctions) of
+ true -> St;
+ false ->
+ add_error(L, {undefined_function,FA}, St)
+ end;
+ false ->
+ add_error(L, {bad_dialyzer_option,Option}, St)
+ end;
+ ({L,Option}, St) ->
+ case is_module_dialyzer_option(Option) of
+ true -> St;
+ false ->
+ add_error(L, {bad_dialyzer_option,Option}, St)
+ end
+ end,
+ foldl(Fun, St1, Wellformed).
+
+is_function_dialyzer_option(nowarn_function) -> true;
+is_function_dialyzer_option(Option) ->
+ is_module_dialyzer_option(Option).
+
+is_module_dialyzer_option(Option) ->
+ lists:member(Option,
+ [no_return,no_unused,no_improper_lists,no_fun_app,
+ no_match,no_opaque,no_fail_call,no_contracts,
+ no_behaviours,no_undefined_callbacks,unmatched_returns,
+ error_handling,race_conditions,no_missing_calls,
+ specdiffs,overspecs,underspecs,unknown]).
+
 %% icrt_clauses(Clauses, In, ImportVarTable, State) ->
 %% {UpdVt,State}.
 
-- 
2.12.2

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