aboutsummaryrefslogtreecommitdiffstats
path: root/lib/stdlib/src
diff options
context:
space:
mode:
authorHans Bolinder <[email protected]>2013-02-08 11:44:59 +0100
committerHans Bolinder <[email protected]>2013-02-08 11:44:59 +0100
commit14966543730096365d4fddc5ac1dce8554c40d7c (patch)
treefbe32e232dcfc3e58ec68e6ad32456b2de9b1fbf /lib/stdlib/src
parentc31f807b094f35289828395a90f93a240f15c85f (diff)
parent6e5fcc26742ca7ae3bdd4249c15e87b8667609fc (diff)
downloadotp-14966543730096365d4fddc5ac1dce8554c40d7c.tar.gz
otp-14966543730096365d4fddc5ac1dce8554c40d7c.tar.bz2
otp-14966543730096365d4fddc5ac1dce8554c40d7c.zip
Merge branch 'hb/stdlib/bug_fixes/OTP-10622'
* hb/stdlib/bug_fixes/OTP-10622: [stdlib] Fix a bug that could cause the Erlang shell to loop [stdlib] Fix bugs in eval_bits
Diffstat (limited to 'lib/stdlib/src')
-rw-r--r--lib/stdlib/src/eval_bits.erl64
-rw-r--r--lib/stdlib/src/shell.erl4
2 files changed, 60 insertions, 8 deletions
diff --git a/lib/stdlib/src/eval_bits.erl b/lib/stdlib/src/eval_bits.erl
index f40904df1c..e49cbc1fd1 100644
--- a/lib/stdlib/src/eval_bits.erl
+++ b/lib/stdlib/src/eval_bits.erl
@@ -2,7 +2,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 1999-2011. All Rights Reserved.
+%% Copyright Ericsson AB 1999-2013. 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
@@ -67,7 +67,8 @@ expr_grp([], Bs0, _Lf, Acc) ->
{value,Acc,Bs0}.
eval_field({bin_element, _, {string, _, S}, default, default}, Bs0, _Fun) ->
- {list_to_binary(S),Bs0};
+ Latin1 = [C band 16#FF || C <- S],
+ {list_to_binary(Latin1),Bs0};
eval_field({bin_element, Line, {string, _, S}, Size0, Options0}, Bs, _Fun) ->
{_Size,[Type,_Unit,_Sign,Endian]} =
make_bit_type(Line, Size0, Options0),
@@ -162,8 +163,10 @@ bin_gen([], Bin, _Bs0, _BBs0, _Mfun, _Efun, false) ->
bin_gen_field({bin_element,_,{string,_,S},default,default},
Bin, Bs, BBs, _Mfun, _Efun) ->
- Bits = list_to_binary(S),
- Size = byte_size(Bits),
+ Bits = try list_to_binary(S)
+ catch _:_ -> <<>>
+ end,
+ Size = length(S),
case Bin of
<<Bits:Size/binary,Rest/bitstring>> ->
{match,Bs,BBs,Rest};
@@ -172,16 +175,42 @@ bin_gen_field({bin_element,_,{string,_,S},default,default},
_ ->
done
end;
+bin_gen_field({bin_element,Line,{string,SLine,S},Size0,Options0},
+ Bin0, Bs0, BBs0, Mfun, Efun) ->
+ {Size1, [Type,{unit,Unit},Sign,Endian]} =
+ make_bit_type(Line, Size0, Options0),
+ match_check_size(Mfun, Size1, BBs0),
+ {value, Size, _BBs} = Efun(Size1, BBs0),
+ F = fun(C, Bin, Bs, BBs) ->
+ bin_gen_field1(Bin, Type, Size, Unit, Sign, Endian,
+ {integer,SLine,C}, Bs, BBs, Mfun)
+ end,
+ bin_gen_field_string(S, Bin0, Bs0, BBs0, F);
bin_gen_field({bin_element,Line,VE,Size0,Options0},
Bin, Bs0, BBs0, Mfun, Efun) ->
{Size1, [Type,{unit,Unit},Sign,Endian]} =
make_bit_type(Line, Size0, Options0),
V = erl_eval:partial_eval(VE),
+ NewV = coerce_to_float(V, Type),
match_check_size(Mfun, Size1, BBs0),
{value, Size, _BBs} = Efun(Size1, BBs0),
+ bin_gen_field1(Bin, Type, Size, Unit, Sign, Endian, NewV, Bs0, BBs0, Mfun).
+
+bin_gen_field_string([], Rest, Bs, BBs, _F) ->
+ {match,Bs,BBs,Rest};
+bin_gen_field_string([C|Cs], Bin0, Bs0, BBs0, Fun) ->
+ case Fun(C, Bin0, Bs0, BBs0) of
+ {match,Bs,BBs,Rest} ->
+ bin_gen_field_string(Cs, Rest, Bs, BBs, Fun);
+ {nomatch,Rest} ->
+ {nomatch,Rest};
+ done ->
+ done
+ end.
+
+bin_gen_field1(Bin, Type, Size, Unit, Sign, Endian, NewV, Bs0, BBs0, Mfun) ->
case catch get_value(Bin, Type, Size, Unit, Sign, Endian) of
{Val,<<_/bitstring>>=Rest} ->
- NewV = coerce_to_float(V, Type),
case catch Mfun(match, {NewV,Val,Bs0}) of
{match,Bs} ->
BBs = add_bin_binding(Mfun, NewV, Bs, BBs0),
@@ -223,20 +252,41 @@ match_bits_1([F|Fs], Bits0, Bs0, BBs0, Mfun, Efun) ->
match_field_1({bin_element,_,{string,_,S},default,default},
Bin, Bs, BBs, _Mfun, _Efun) ->
- Bits = list_to_binary(S),
+ Bits = list_to_binary(S), % fails if there are characters > 255
Size = byte_size(Bits),
<<Bits:Size/binary,Rest/binary-unit:1>> = Bin,
{Bs,BBs,Rest};
+match_field_1({bin_element,Line,{string,SLine,S},Size0,Options0},
+ Bin0, Bs0, BBs0, Mfun, Efun) ->
+ {Size1, [Type,{unit,Unit},Sign,Endian]} =
+ make_bit_type(Line, Size0, Options0),
+ Size2 = erl_eval:partial_eval(Size1),
+ match_check_size(Mfun, Size2, BBs0),
+ {value, Size, _BBs} = Efun(Size2, BBs0),
+ F = fun(C, Bin, Bs, BBs) ->
+ match_field(Bin, Type, Size, Unit, Sign, Endian,
+ {integer,SLine,C}, Bs, BBs, Mfun)
+ end,
+ match_field_string(S, Bin0, Bs0, BBs0, F);
match_field_1({bin_element,Line,VE,Size0,Options0},
Bin, Bs0, BBs0, Mfun, Efun) ->
{Size1, [Type,{unit,Unit},Sign,Endian]} =
make_bit_type(Line, Size0, Options0),
V = erl_eval:partial_eval(VE),
+ NewV = coerce_to_float(V, Type),
Size2 = erl_eval:partial_eval(Size1),
match_check_size(Mfun, Size2, BBs0),
{value, Size, _BBs} = Efun(Size2, BBs0),
+ match_field(Bin, Type, Size, Unit, Sign, Endian, NewV, Bs0, BBs0, Mfun).
+
+match_field_string([], Rest, Bs, BBs, _Fun) ->
+ {Bs,BBs,Rest};
+match_field_string([C|Cs], Bin0, Bs0, BBs0, Fun) ->
+ {Bs,BBs,Bin} = Fun(C, Bin0, Bs0, BBs0),
+ match_field_string(Cs, Bin, Bs, BBs, Fun).
+
+match_field(Bin, Type, Size, Unit, Sign, Endian, NewV, Bs0, BBs0, Mfun) ->
{Val,Rest} = get_value(Bin, Type, Size, Unit, Sign, Endian),
- NewV = coerce_to_float(V, Type),
{match,Bs} = Mfun(match, {NewV,Val,Bs0}),
BBs = add_bin_binding(Mfun, NewV, Bs, BBs0),
{Bs,BBs,Rest}.
diff --git a/lib/stdlib/src/shell.erl b/lib/stdlib/src/shell.erl
index 203d2a4f76..0cd408204e 100644
--- a/lib/stdlib/src/shell.erl
+++ b/lib/stdlib/src/shell.erl
@@ -185,7 +185,7 @@ server(StartSync) ->
%% Check if we're in user restricted mode.
RShErr =
case application:get_env(stdlib, restricted_shell) of
- {ok,RShMod} ->
+ {ok,RShMod} when is_atom(RShMod) ->
io:fwrite(<<"Restricted ">>, []),
case code:ensure_loaded(RShMod) of
{module,RShMod} ->
@@ -193,6 +193,8 @@ server(StartSync) ->
{error,What} ->
{RShMod,What}
end;
+ {ok, Term} ->
+ {Term,not_an_atom};
undefined ->
undefined
end,