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-rw-r--r--lib/dialyzer/src/dialyzer_dataflow.erl250
1 files changed, 107 insertions, 143 deletions
diff --git a/lib/dialyzer/src/dialyzer_dataflow.erl b/lib/dialyzer/src/dialyzer_dataflow.erl
index bb5604cd5f..9df9aca69f 100644
--- a/lib/dialyzer/src/dialyzer_dataflow.erl
+++ b/lib/dialyzer/src/dialyzer_dataflow.erl
@@ -53,7 +53,7 @@
t_bitstr/0, t_bitstr/2, t_bitstr_concat/1, t_bitstr_match/2,
t_cons/0, t_cons/2, t_cons_hd/2, t_cons_tl/2,
t_contains_opaque/2,
- t_find_opaque_mismatch/2, t_float/0, t_from_range/2, t_from_term/1,
+ t_find_opaque_mismatch/3, t_float/0, t_from_range/2, t_from_term/1,
t_fun/0, t_fun/2, t_fun_args/1, t_fun_args/2, t_fun_range/1,
t_fun_range/2, t_integer/0, t_integers/1,
t_is_any/1, t_is_atom/1, t_is_atom/2, t_is_any_atom/3,
@@ -136,11 +136,10 @@
get_warnings(Tree, Plt, Callgraph, Records, NoWarnUnused) ->
State1 = analyze_module(Tree, Plt, Callgraph, Records, true),
- State2 = find_mismatched_record_patterns(Tree, State1),
- State3 =
- state__renew_warnings(state__get_warnings(State2, NoWarnUnused), State2),
- State4 = state__get_race_warnings(State3),
- {State4#state.warnings, state__all_fun_types(State4)}.
+ State2 =
+ state__renew_warnings(state__get_warnings(State1, NoWarnUnused), State1),
+ State3 = state__get_race_warnings(State2),
+ {State3#state.warnings, state__all_fun_types(State3)}.
-spec get_fun_types(cerl:c_module(), dialyzer_plt:plt(),
dialyzer_callgraph:callgraph(),
@@ -277,13 +276,8 @@ traverse(Tree, Map, State) ->
{State1, Map1} = lists:foldl(FoldFun, {State, Map}, Defs),
traverse(Body, Map1, State1);
literal ->
- %% This is needed for finding records
- case cerl:unfold_literal(Tree) of
- Tree ->
- Type = literal_type(Tree),
- {State, Map, Type};
- NewTree -> traverse(NewTree, Map, State)
- end;
+ Type = literal_type(Tree),
+ {State, Map, Type};
module ->
handle_module(Tree, Map, State);
primop ->
@@ -1110,7 +1104,7 @@ handle_tuple(Tree, Map, State) ->
%% Let's find out if this is a record
case Elements of
[Tag|Left] ->
- case cerl:is_c_atom(Tag) of
+ case cerl:is_c_atom(Tag) andalso is_literal_record(Tree) of
true ->
TagVal = cerl:atom_val(Tag),
case state__lookup_record(TagVal, length(Left), State1) of
@@ -1240,15 +1234,10 @@ do_clause(C, Arg, ArgType0, OrigArgType, Map, State) ->
false ->
{State1, Map, t_none(), ArgType0};
true ->
- PatString =
- case ErrorType of
- bind -> format_patterns(Pats);
- record -> format_patterns(Pats);
- opaque -> format_patterns(NewPats)
- end,
{Msg, Force} =
case t_is_none(ArgType0) of
true ->
+ PatString = format_patterns(Pats),
PatTypes = [PatString, format_type(OrigArgType, State1)],
%% See if this is covered by an earlier clause or if it
%% simply cannot match
@@ -1298,6 +1287,12 @@ do_clause(C, Arg, ArgType0, OrigArgType, Map, State) ->
false ->
true
end,
+ PatString =
+ case ErrorType of
+ bind -> format_patterns(Pats);
+ record -> format_patterns(NewPats);
+ opaque -> format_patterns(NewPats)
+ end,
PatTypes = case ErrorType of
bind -> [PatString, format_type(ArgType0, State1)];
record -> [PatString, format_type(Type, State1)];
@@ -1444,7 +1439,7 @@ bind_pat_vars([Pat|PatLeft], [Type|TypeLeft], Acc, Map, State, Rev) ->
BinType = t_inf(t_bitstr(), Type, Opaques),
case t_is_none(BinType) of
true ->
- case t_find_opaque_mismatch(t_bitstr(), Type) of
+ case t_find_opaque_mismatch(t_bitstr(), Type, Opaques) of
{ok, T1, T2} ->
bind_error([Pat], T1, T2, opaque);
error ->
@@ -1460,7 +1455,7 @@ bind_pat_vars([Pat|PatLeft], [Type|TypeLeft], Acc, Map, State, Rev) ->
Cons = t_inf(Type, t_cons(), Opaques),
case t_is_none(Cons) of
true ->
- bind_opaque_pats(t_cons(), Type, Pat, Map, State, Rev);
+ bind_opaque_pats(t_cons(), Type, Pat, State);
false ->
{Map1, [HdType, TlType]} =
bind_pat_vars([cerl:cons_hd(Pat), cerl:cons_tl(Pat)],
@@ -1473,7 +1468,7 @@ bind_pat_vars([Pat|PatLeft], [Type|TypeLeft], Acc, Map, State, Rev) ->
Literal = literal_type(Pat),
case t_is_none(t_inf(Literal, Type, Opaques)) of
true ->
- bind_opaque_pats(Literal, Type, Pat, Map, State, Rev);
+ bind_opaque_pats(Literal, Type, Pat, State);
false -> {Map, Literal}
end;
map ->
@@ -1484,7 +1479,7 @@ bind_pat_vars([Pat|PatLeft], [Type|TypeLeft], Acc, Map, State, Rev) ->
case Es of
[] -> {false, t_tuple([])};
[Tag|Left] ->
- case cerl:is_c_atom(Tag) of
+ case cerl:is_c_atom(Tag) andalso is_literal_record(Pat) of
true ->
TagAtom = cerl:atom_val(Tag),
case state__lookup_record(TagAtom, length(Left), State) of
@@ -1500,7 +1495,7 @@ bind_pat_vars([Pat|PatLeft], [Type|TypeLeft], Acc, Map, State, Rev) ->
Tuple = t_inf(Prototype, Type, Opaques),
case t_is_none(Tuple) of
true ->
- bind_opaque_pats(Prototype, Type, Pat, Map, State, Rev);
+ bind_opaque_pats(Prototype, Type, Pat, State);
false ->
SubTuples = t_tuple_subtypes(Tuple, Opaques),
%% Need to call the top function to get the try-catch wrapper
@@ -1549,7 +1544,7 @@ bind_pat_vars([Pat|PatLeft], [Type|TypeLeft], Acc, Map, State, Rev) ->
VarType2 = t_inf(VarType1, Type, Opaques),
case t_is_none(VarType2) of
true ->
- case t_find_opaque_mismatch(VarType1, Type) of
+ case t_find_opaque_mismatch(VarType1, Type, Opaques) of
{ok, T1, T2} ->
bind_error([Pat], T1, T2, opaque);
error ->
@@ -1631,21 +1626,26 @@ bind_bin_segs([Seg|Segs], BinType, Acc, Map, State) ->
bind_bin_segs([], _BinType, Acc, Map, _State) ->
{Map, lists:reverse(Acc)}.
-bind_error(Pats, Type, OpaqueType, Error) ->
+bind_error(Pats, Type, OpaqueType, Error0) ->
+ Error = case {Error0, Pats} of
+ {bind, [Pat]} ->
+ case is_literal_record(Pat) of
+ true -> record;
+ false -> Error0
+ end;
+ _ -> Error0
+ end,
throw({error, Error, Pats, Type, OpaqueType}).
-bind_opaque_pats(GenType, Type, Pat, Map, State, Rev) ->
- case t_find_opaque_mismatch(GenType, Type) of
+-spec bind_opaque_pats(type(), type(), cerl:c_literal(), state()) ->
+ no_return().
+
+bind_opaque_pats(GenType, Type, Pat, State) ->
+ case t_find_opaque_mismatch(GenType, Type, State#state.opaques) of
{ok, T1, T2} ->
- case erl_types:is_opaque_type(T2, State#state.opaques) of
- true ->
- NewType = erl_types:t_struct_from_opaque(Type, [T2]),
- {Map1, _} =
- bind_pat_vars([Pat], [NewType], [], Map, State, Rev),
- {Map1, T2};
- false -> bind_error([Pat], T1, T2, opaque)
- end;
- error -> bind_error([Pat], Type, t_none(), bind)
+ bind_error([Pat], T1, T2, opaque);
+ error ->
+ bind_error([Pat], Type, t_none(), bind)
end.
%%----------------------------------------
@@ -1843,9 +1843,9 @@ handle_guard_comp(Guard, Comp, Map, Env, Eval, State) ->
[Type1, Type2] = ArgTypes,
IsInt1 = t_is_integer(Type1, Opaques),
IsInt2 = t_is_integer(Type2, Opaques),
- case {cerl:type(Arg1), cerl:type(Arg2)} of
- {literal, literal} ->
- case erlang:Comp(cerl:concrete(Arg1), cerl:concrete(Arg2)) of
+ case {type(Arg1), type(Arg2)} of
+ {{literal, Lit1}, {literal, Lit2}} ->
+ case erlang:Comp(cerl:concrete(Lit1), cerl:concrete(Lit2)) of
true when Eval =:= pos -> {Map, t_atom(true)};
true when Eval =:= dont_know -> {Map, t_atom(true)};
true when Eval =:= neg -> {Map, t_atom(true)};
@@ -1854,13 +1854,13 @@ handle_guard_comp(Guard, Comp, Map, Env, Eval, State) ->
false when Eval =:= dont_know -> {Map, t_atom(false)};
false when Eval =:= neg -> {Map, t_atom(false)}
end;
- {literal, var} when IsInt1 andalso IsInt2 andalso (Eval =:= pos) ->
- case bind_comp_literal_var(Arg1, Arg2, Type2, Comp, Map1, Opaques) of
+ {{literal, Lit1}, var} when IsInt1 andalso IsInt2 andalso (Eval =:= pos) ->
+ case bind_comp_literal_var(Lit1, Arg2, Type2, Comp, Map1, Opaques) of
error -> signal_guard_fail(Eval, Guard, ArgTypes, State);
{ok, NewMap} -> {NewMap, t_atom(true)}
end;
- {var, literal} when IsInt1 andalso IsInt2 andalso (Eval =:= pos) ->
- case bind_comp_literal_var(Arg2, Arg1, Type1, invert_comp(Comp),
+ {var, {literal, Lit2}} when IsInt1 andalso IsInt2 andalso (Eval =:= pos) ->
+ case bind_comp_literal_var(Lit2, Arg1, Type1, invert_comp(Comp),
Map1, Opaques) of
error -> signal_guard_fail(Eval, Guard, ArgTypes, State);
{ok, NewMap} -> {NewMap, t_atom(true)}
@@ -1980,15 +1980,15 @@ handle_guard_is_record(Guard, Map, Env, Eval, State) ->
handle_guard_eq(Guard, Map, Env, Eval, State) ->
[Arg1, Arg2] = cerl:call_args(Guard),
- case {cerl:type(Arg1), cerl:type(Arg2)} of
- {literal, literal} ->
- case cerl:concrete(Arg1) =:= cerl:concrete(Arg2) of
+ case {type(Arg1), type(Arg2)} of
+ {{literal, Lit1}, {literal, Lit2}} ->
+ case cerl:concrete(Lit1) =:= cerl:concrete(Lit2) of
true ->
if
Eval =:= pos -> {Map, t_atom(true)};
Eval =:= neg ->
- ArgTypes = [t_from_term(cerl:concrete(Arg1)),
- t_from_term(cerl:concrete(Arg2))],
+ ArgTypes = [t_from_term(cerl:concrete(Lit1)),
+ t_from_term(cerl:concrete(Lit2))],
signal_guard_fail(Eval, Guard, ArgTypes, State);
Eval =:= dont_know -> {Map, t_atom(true)}
end;
@@ -1997,28 +1997,28 @@ handle_guard_eq(Guard, Map, Env, Eval, State) ->
Eval =:= neg -> {Map, t_atom(false)};
Eval =:= dont_know -> {Map, t_atom(false)};
Eval =:= pos ->
- ArgTypes = [t_from_term(cerl:concrete(Arg1)),
- t_from_term(cerl:concrete(Arg2))],
+ ArgTypes = [t_from_term(cerl:concrete(Lit1)),
+ t_from_term(cerl:concrete(Lit2))],
signal_guard_fail(Eval, Guard, ArgTypes, State)
end
end;
- {literal, _} when Eval =:= pos ->
- case cerl:concrete(Arg1) of
+ {{literal, Lit1}, _} when Eval =:= pos ->
+ case cerl:concrete(Lit1) of
Atom when is_atom(Atom) ->
- bind_eqeq_guard_lit_other(Guard, Arg1, Arg2, Map, Env, State);
+ bind_eqeq_guard_lit_other(Guard, Lit1, Arg2, Map, Env, State);
[] ->
- bind_eqeq_guard_lit_other(Guard, Arg1, Arg2, Map, Env, State);
+ bind_eqeq_guard_lit_other(Guard, Lit1, Arg2, Map, Env, State);
_ ->
- bind_eq_guard(Guard, Arg1, Arg2, Map, Env, Eval, State)
+ bind_eq_guard(Guard, Lit1, Arg2, Map, Env, Eval, State)
end;
- {_, literal} when Eval =:= pos ->
- case cerl:concrete(Arg2) of
+ {_, {literal, Lit2}} when Eval =:= pos ->
+ case cerl:concrete(Lit2) of
Atom when is_atom(Atom) ->
- bind_eqeq_guard_lit_other(Guard, Arg2, Arg1, Map, Env, State);
+ bind_eqeq_guard_lit_other(Guard, Lit2, Arg1, Map, Env, State);
[] ->
- bind_eqeq_guard_lit_other(Guard, Arg2, Arg1, Map, Env, State);
+ bind_eqeq_guard_lit_other(Guard, Lit2, Arg1, Map, Env, State);
_ ->
- bind_eq_guard(Guard, Arg1, Arg2, Map, Env, Eval, State)
+ bind_eq_guard(Guard, Arg1, Lit2, Map, Env, Eval, State)
end;
{_, _} ->
bind_eq_guard(Guard, Arg1, Arg2, Map, Env, Eval, State)
@@ -2050,13 +2050,14 @@ bind_eq_guard(Guard, Arg1, Arg2, Map, Env, Eval, State) ->
handle_guard_eqeq(Guard, Map, Env, Eval, State) ->
[Arg1, Arg2] = cerl:call_args(Guard),
- case {cerl:type(Arg1), cerl:type(Arg2)} of
- {literal, literal} ->
- case cerl:concrete(Arg1) =:= cerl:concrete(Arg2) of
+ case {type(Arg1), type(Arg2)} of
+ {{literal, Lit1}, {literal, Lit2}} ->
+
+ case cerl:concrete(Lit1) =:= cerl:concrete(Lit2) of
true ->
if Eval =:= neg ->
- ArgTypes = [t_from_term(cerl:concrete(Arg1)),
- t_from_term(cerl:concrete(Arg2))],
+ ArgTypes = [t_from_term(cerl:concrete(Lit1)),
+ t_from_term(cerl:concrete(Lit2))],
signal_guard_fail(Eval, Guard, ArgTypes, State);
Eval =:= pos -> {Map, t_atom(true)};
Eval =:= dont_know -> {Map, t_atom(true)}
@@ -2065,15 +2066,15 @@ handle_guard_eqeq(Guard, Map, Env, Eval, State) ->
if Eval =:= neg -> {Map, t_atom(false)};
Eval =:= dont_know -> {Map, t_atom(false)};
Eval =:= pos ->
- ArgTypes = [t_from_term(cerl:concrete(Arg1)),
- t_from_term(cerl:concrete(Arg2))],
+ ArgTypes = [t_from_term(cerl:concrete(Lit1)),
+ t_from_term(cerl:concrete(Lit2))],
signal_guard_fail(Eval, Guard, ArgTypes, State)
end
end;
- {literal, _} when Eval =:= pos ->
- bind_eqeq_guard_lit_other(Guard, Arg1, Arg2, Map, Env, State);
- {_, literal} when Eval =:= pos ->
- bind_eqeq_guard_lit_other(Guard, Arg2, Arg1, Map, Env, State);
+ {{literal, Lit1}, _} when Eval =:= pos ->
+ bind_eqeq_guard_lit_other(Guard, Lit1, Arg2, Map, Env, State);
+ {_, {literal, Lit2}} when Eval =:= pos ->
+ bind_eqeq_guard_lit_other(Guard, Lit2, Arg1, Map, Env, State);
{_, _} ->
bind_eqeq_guard(Guard, Arg1, Arg2, Map, Env, Eval, State)
end.
@@ -3281,12 +3282,17 @@ get_file([_|Tail]) -> get_file(Tail).
is_compiler_generated(Ann) ->
lists:member(compiler_generated, Ann) orelse (get_line(Ann) < 1).
+is_literal_record(Tree) ->
+ Ann = cerl:get_ann(Tree),
+ lists:member(record, Ann).
+
-spec format_args([cerl:cerl()], [type()], state()) ->
nonempty_string().
format_args([], [], _State) ->
"()";
-format_args(ArgList, TypeList, State) ->
+format_args(ArgList0, TypeList, State) ->
+ ArgList = fold_literals(ArgList0),
"(" ++ format_args_1(ArgList, TypeList, State) ++ ")".
format_args_1([Arg], [Type], State) ->
@@ -3345,7 +3351,8 @@ format_cerl(Tree) ->
{ribbon, 100000} %% newlines.
]).
-format_patterns(Pats) ->
+format_patterns(Pats0) ->
+ Pats = fold_literals(Pats0),
NewPats = map_pats(cerl:c_values(Pats)),
String = format_cerl(NewPats),
case Pats of
@@ -3377,6 +3384,23 @@ map_pats(Pats) ->
end,
cerl_trees:map(Fun, Pats).
+fold_literals(TreeList) ->
+ [cerl:fold_literal(Tree) || Tree <- TreeList].
+
+type(Tree) ->
+ Folded = cerl:fold_literal(Tree),
+ case cerl:type(Folded) of
+ literal -> {literal, Folded};
+ Type -> Type
+ end.
+
+is_literal(Tree) ->
+ Folded = cerl:fold_literal(Tree),
+ case cerl:is_literal(Folded) of
+ true -> {yes, Folded};
+ false -> no
+ end.
+
parent_allows_this(FunLbl, #state{callgraph = Callgraph, plt = Plt} =State) ->
case state__is_escaping(FunLbl, State) of
false -> false; % if it isn't escaping it can't be a return value
@@ -3421,18 +3445,18 @@ find_terminals(Tree) ->
M0 = cerl:call_module(Tree),
F0 = cerl:call_name(Tree),
A = length(cerl:call_args(Tree)),
- case cerl:is_literal(M0) andalso cerl:is_literal(F0) of
- false ->
- %% We cannot make assumptions. Say that both are true.
- {true, true};
- true ->
- M = cerl:concrete(M0),
- F = cerl:concrete(F0),
+ case {is_literal(M0), is_literal(F0)} of
+ {{yes, LitM}, {yes, LitF}} ->
+ M = cerl:concrete(LitM),
+ F = cerl:concrete(LitF),
case (erl_bif_types:is_known(M, F, A)
andalso t_is_none(erl_bif_types:type(M, F, A))) of
true -> {true, false};
false -> {false, true}
- end
+ end;
+ _ ->
+ %% We cannot make assumptions. Say that both are true.
+ {true, true}
end;
'case' -> find_terminals_list(cerl:case_clauses(Tree));
'catch' -> find_terminals(cerl:catch_body(Tree));
@@ -3477,66 +3501,6 @@ find_terminals_list([], Explicit, Normal) ->
%%----------------------------------------------------------------------------
-%% If you write a record pattern in a matching that violates the
-%% definition it will never match. However, the warning is lost in the
-%% regular analysis. This after-pass catches it.
-
-find_mismatched_record_patterns(Tree, State) ->
- cerl_trees:fold(
- fun(SubTree, AccState) ->
- case cerl:is_c_clause(SubTree) of
- true -> lists:foldl(fun(P, AccState1) ->
- find_rec_warnings(P, AccState1)
- end, AccState, cerl:clause_pats(SubTree));
- false -> AccState
- end
- end, State, Tree).
-
-find_rec_warnings(Tree, State) ->
- cerl_trees:fold(
- fun(SubTree, AccState) ->
- case cerl:is_c_tuple(SubTree) of
- true -> find_rec_warnings_tuple(SubTree, AccState);
- false -> AccState
- end
- end, State, Tree).
-
-find_rec_warnings_tuple(Tree, State) ->
- Elements = cerl:tuple_es(Tree),
- {_, _, EsType} = traverse_list(Elements, map__new(), State),
- TupleType = t_tuple(EsType),
- case t_is_none(TupleType) of
- true -> State;
- false ->
- %% Let's find out if this is a record construction.
- case Elements of
- [Tag|Left] ->
- case cerl:is_c_atom(Tag) of
- true ->
- TagVal = cerl:atom_val(Tag),
- case state__lookup_record(TagVal, length(Left), State) of
- error -> State;
- {ok, Prototype} ->
- InfTupleType = t_inf(Prototype, TupleType),
- case t_is_none(InfTupleType) of
- true ->
- Msg = {record_matching,
- [format_patterns([Tree]), TagVal]},
- state__add_warning(State, ?WARN_MATCHING, Tree, Msg);
- false ->
- State
- end
- end;
- false ->
- State
- end;
- _ ->
- State
- end
- end.
-
-%%----------------------------------------------------------------------------
-
-ifdef(DEBUG_PP).
debug_pp(Tree, true) ->
io:put_chars(cerl_prettypr:format(Tree, [{hook, cerl_typean:pp_hook()}])),
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-17 07:46:05 +0000