From 23ec68ef0f06710733cdfba5fdeaea1d1df789cf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= <bjorn@erlang.org>
Date: Tue, 24 Jan 2012 16:24:41 +0100
Subject: Ensure that generated record operations don't call local functions
Consistently use external (remote) calls to the BIFs element/2,
setelement/3, and is_record/3.
---
lib/stdlib/src/erl_expand_records.erl | 17 ++++++++++++-----
lib/stdlib/test/erl_expand_records_SUITE.erl | 12 ++++++++++++
2 files changed, 24 insertions(+), 5 deletions(-)
(limited to 'lib/stdlib')
diff --git a/lib/stdlib/src/erl_expand_records.erl b/lib/stdlib/src/erl_expand_records.erl
index 20fd247cea..1c69a131f9 100644
--- a/lib/stdlib/src/erl_expand_records.erl
+++ b/lib/stdlib/src/erl_expand_records.erl
@@ -452,8 +452,10 @@ conj([], _E) ->
conj([{{Name,_Rp},L,R,Sz} | AL], E) ->
NL = neg_line(L),
T1 = {op,NL,'orelse',
- {call,NL,{atom,NL,is_record},[R,{atom,NL,Name},{integer,NL,Sz}]},
- {atom,NL,fail}},
+ {call,NL,
+ {remote,NL,{atom,NL,erlang},{atom,NL,is_record}},
+ [R,{atom,NL,Name},{integer,NL,Sz}]},
+ {atom,NL,fail}},
T2 = case conj(AL, none) of
empty -> T1;
C -> {op,NL,'and',C,T1}
@@ -581,7 +583,9 @@ strict_get_record_field(Line, R, {atom,_,F}=Index, Name, St0) ->
ExpRp = erl_lint:modify_line(ExpR, fun(_L) -> 0 end),
RA = {{Name,ExpRp},Line,ExpR,length(Fs)+1},
St2 = St1#exprec{strict_ra = [RA | St1#exprec.strict_ra]},
- {{call,Line,{atom,Line,element},[I,ExpR]},St2}
+ {{call,Line,
+ {remote,Line,{atom,Line,erlang},{atom,Line,element}},
+ [I,ExpR]},St2}
end.
record_pattern(I, I, Var, Sz, Line, Acc) ->
@@ -593,7 +597,9 @@ record_pattern(_, _, _, _, _, Acc) -> reverse(Acc).
sloppy_get_record_field(Line, R, Index, Name, St) ->
Fs = record_fields(Name, St),
I = index_expr(Line, Index, Name, Fs),
- expr({call,Line,{atom,Line,element},[I,R]}, St).
+ expr({call,Line,
+ {remote,Line,{atom,Line,erlang},{atom,Line,element}},
+ [I,R]}, St).
strict_record_tests([strict_record_tests | _]) -> true;
strict_record_tests([no_strict_record_tests | _]) -> false;
@@ -710,7 +716,8 @@ record_setel(R, Name, Fs, Us0) ->
{'case',Lr,R,
[{clause,Lr,[{tuple,Lr,[{atom,Lr,Name} | Wildcards]}],[],
[foldr(fun ({I,Lf,Val}, Acc) ->
- {call,Lf,{atom,Lf,setelement},[I,Acc,Val]} end,
+ {call,Lf,{remote,Lf,{atom,Lf,erlang},
+ {atom,Lf,setelement}},[I,Acc,Val]} end,
R, Us)]},
{clause,NLr,[{var,NLr,'_'}],[],
[call_error(NLr, {tuple,NLr,[{atom,NLr,badrecord},{atom,NLr,Name}]})]}]}.
diff --git a/lib/stdlib/test/erl_expand_records_SUITE.erl b/lib/stdlib/test/erl_expand_records_SUITE.erl
index f8c1ad783c..8b162cfda0 100644
--- a/lib/stdlib/test/erl_expand_records_SUITE.erl
+++ b/lib/stdlib/test/erl_expand_records_SUITE.erl
@@ -178,6 +178,9 @@ expr(Config) when is_list(Config) ->
true ->
not_ok
end.
+
+ is_record(_, _, _) ->
+ error(wrong_is_record).
">>
],
@@ -366,6 +369,8 @@ strict(Config) when is_list(Config) ->
end
catch error:_ -> ok
end.
+ element(_, _) ->
+ error(wrong_element).
">>
],
?line run(Config, Ts1, [strict_record_tests]),
@@ -380,6 +385,8 @@ strict(Config) when is_list(Config) ->
case foo of
_ when A#r2.a =:= 1 -> ok
end.
+ element(_, _) ->
+ error(wrong_element).
">>
],
?line run(Config, Ts2, [no_strict_record_tests]),
@@ -415,6 +422,11 @@ update(Config) when is_list(Config) ->
t2() ->
R0 = #r{},
#r{_ = R0#r{a = ok}}.
+
+ %% Implicit calls to setelement/3 must go to the BIF,
+ %% not to this function.
+ setelement(_, _, _) ->
+ erlang:error(wrong_setelement_called).
">>
],
?line run(Config, Ts),
--
cgit v1.2.3
From 09d19b4e5e5314d6fc4ee04bc09a673ac8e0bd27 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= <bjorn@erlang.org>
Date: Wed, 25 Jan 2012 11:39:26 +0100
Subject: erl_lint: Disallow call to is_record/3 if there is a local
is_record/3
Attempting to call is_record/3 (without an erlang: prefix) from a
guard if there was a local function named is_record/3 would cause
a compiler crash. For consistency with other guard tests, disallow
the call.
is_record/2 in a guard will still be allowed (and work correctly)
even if there is a local is_record/2. It could be argued that
is_record/2 should be handled in the same way as is_record/3,
but changing that now could break working code.
---
lib/stdlib/src/erl_lint.erl | 12 +++++++++---
lib/stdlib/test/erl_lint_SUITE.erl | 23 +++++++++++++++++------
2 files changed, 26 insertions(+), 9 deletions(-)
(limited to 'lib/stdlib')
diff --git a/lib/stdlib/src/erl_lint.erl b/lib/stdlib/src/erl_lint.erl
index 2f29954dc9..cfbcf54d95 100644
--- a/lib/stdlib/src/erl_lint.erl
+++ b/lib/stdlib/src/erl_lint.erl
@@ -1808,7 +1808,7 @@ guard_test2({call,Line,{atom,_La,F},As}=G, Vt, St0) ->
{Asvt,St1} = gexpr_list(As, Vt, St0), %Always check this.
A = length(As),
case erl_internal:type_test(F, A) of
- true when F =/= is_record ->
+ true when F =/= is_record, A =/= 2 ->
case no_guard_bif_clash(St1, {F,A}) of
false ->
{Asvt,add_error(Line, {illegal_guard_local_call,{F,A}}, St1)};
@@ -1872,9 +1872,15 @@ gexpr({call,Line,{atom,_Lr,is_record},[E,R]}, Vt, St0) ->
gexpr({call,Line,{remote,_Lr,{atom,_Lm,erlang},{atom,Lf,is_record}},[E,A]},
Vt, St0) ->
gexpr({call,Line,{atom,Lf,is_record},[E,A]}, Vt, St0);
-gexpr({call,_Line,{atom,_Lr,is_record},[E,{atom,_,_Name},{integer,_,_}]},
+gexpr({call,Line,{atom,_Lr,is_record},[E0,{atom,_,_Name},{integer,_,_}]},
Vt, St0) ->
- gexpr(E, Vt, St0);
+ {E,St1} = gexpr(E0, Vt, St0),
+ case no_guard_bif_clash(St0, {is_record,3}) of
+ true ->
+ {E,St1};
+ false ->
+ {E,add_error(Line, {illegal_guard_local_call,{is_record,3}}, St1)}
+ end;
gexpr({call,Line,{atom,_Lr,is_record},[_,_,_]=Asvt0}, Vt, St0) ->
{Asvt,St1} = gexpr_list(Asvt0, Vt, St0),
{Asvt,add_error(Line, illegal_guard_expr, St1)};
diff --git a/lib/stdlib/test/erl_lint_SUITE.erl b/lib/stdlib/test/erl_lint_SUITE.erl
index e4c7fd5b02..4e93f056ad 100644
--- a/lib/stdlib/test/erl_lint_SUITE.erl
+++ b/lib/stdlib/test/erl_lint_SUITE.erl
@@ -2633,22 +2633,33 @@ bif_clash(Config) when is_list(Config) ->
[warn_unused_import],
{warnings,[{2,erl_lint,{redefine_bif_import,{binary_part,3}}}]}},
%% Don't accept call to a guard BIF if there is a local definition
- %% or an import with the same name.
+ %% or an import with the same name. Note: is_record/2 is an
+ %% exception, since it is more of syntatic sugar than a real BIF.
{clash21,
<<"-export([is_list/1]).
-import(x, [is_tuple/1]).
+ -record(r, {a,b}).
x(T) when is_tuple(T) -> ok;
x(T) when is_list(T) -> ok.
y(T) when is_tuple(T) =:= true -> ok;
- y(T) when is_list(T) =:= true -> ok.
+ y(T) when is_list(T) =:= true -> ok;
+ y(T) when is_record(T, r, 3) -> ok;
+ y(T) when is_record(T, r, 3) =:= true -> ok;
+ y(T) when is_record(T, r) =:= true -> ok.
is_list(_) ->
ok.
+ is_record(_, _) ->
+ ok.
+ is_record(_, _, _) ->
+ ok.
">>,
[{no_auto_import,[{is_tuple,1}]}],
- {errors,[{3,erl_lint,{illegal_guard_local_call,{is_tuple,1}}},
- {4,erl_lint,{illegal_guard_local_call,{is_list,1}}},
- {5,erl_lint,{illegal_guard_local_call,{is_tuple,1}}},
- {6,erl_lint,{illegal_guard_local_call,{is_list,1}}}],[]}}
+ {errors,[{4,erl_lint,{illegal_guard_local_call,{is_tuple,1}}},
+ {5,erl_lint,{illegal_guard_local_call,{is_list,1}}},
+ {6,erl_lint,{illegal_guard_local_call,{is_tuple,1}}},
+ {7,erl_lint,{illegal_guard_local_call,{is_list,1}}},
+ {8,erl_lint,{illegal_guard_local_call,{is_record,3}}},
+ {9,erl_lint,{illegal_guard_local_call,{is_record,3}}}],[]}}
],
?line [] = run(Config, Ts),
--
cgit v1.2.3