aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--erts/emulator/beam/erl_vm.h4
-rw-r--r--lib/stdlib/src/erl_lint.erl22
-rw-r--r--lib/stdlib/test/erl_lint_SUITE.erl22
-rw-r--r--system/doc/efficiency_guide/advanced.xml4
4 files changed, 40 insertions, 12 deletions
diff --git a/erts/emulator/beam/erl_vm.h b/erts/emulator/beam/erl_vm.h
index 48fa99934e..5b42a2ce11 100644
--- a/erts/emulator/beam/erl_vm.h
+++ b/erts/emulator/beam/erl_vm.h
@@ -1,7 +1,7 @@
/*
* %CopyrightBegin%
*
- * Copyright Ericsson AB 1996-2010. All Rights Reserved.
+ * Copyright Ericsson AB 1996-2011. 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
@@ -47,7 +47,7 @@
#define SEQ_TRACE 1
#define CONTEXT_REDS 2000 /* Swap process out after this number */
-#define MAX_ARG 256 /* Max number of arguments allowed */
+#define MAX_ARG 255 /* Max number of arguments allowed */
#define MAX_REG 1024 /* Max number of x(N) registers used */
/* Scheduler stores data for temporary heaps if
diff --git a/lib/stdlib/src/erl_lint.erl b/lib/stdlib/src/erl_lint.erl
index 0c2d3db8ec..cfb9f0ca98 100644
--- a/lib/stdlib/src/erl_lint.erl
+++ b/lib/stdlib/src/erl_lint.erl
@@ -2,7 +2,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 1996-2010. All Rights Reserved.
+%% Copyright Ericsson AB 1996-2011. 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
@@ -60,6 +60,10 @@ value_option(Flag, Default, On, OnVal, Off, OffVal, Opts) ->
(_Opt, Def) -> Def
end, Default, Opts).
+%% The maximum number of arguments allowed for a function.
+
+-define(MAX_ARGUMENTS, 255).
+
%% The error and warning info structures, {Line,Module,Descriptor},
%% are kept in their seperate fields in the lint state record together
%% with the name of the file (when a new file is entered, marked by
@@ -226,6 +230,9 @@ format_error({obsolete_guard, {F, A}}) ->
io_lib:format("~p/~p obsolete", [F, A]);
format_error({reserved_for_future,K}) ->
io_lib:format("atom ~w: future reserved keyword - rename or quote", [K]);
+format_error({too_many_arguments,Arity}) ->
+ io_lib:format("too many arguments (~w) - "
+ "maximum allowed is ~w", [Arity,?MAX_ARGUMENTS]);
%% --- patterns and guards ---
format_error(illegal_pattern) -> "illegal pattern";
format_error(illegal_bin_pattern) ->
@@ -1307,13 +1314,18 @@ define_function(Line, Name, Arity, St0) ->
true ->
add_error(Line, {redefine_function,NA}, St1);
false ->
- St2 = St1#lint{defined=gb_sets:add_element(NA, St1#lint.defined)},
- case imported(Name, Arity, St2) of
- {yes,_M} -> add_error(Line, {define_import,NA}, St2);
- no -> St2
+ St2 = function_check_max_args(Line, Arity, St1),
+ St3 = St2#lint{defined=gb_sets:add_element(NA, St2#lint.defined)},
+ case imported(Name, Arity, St3) of
+ {yes,_M} -> add_error(Line, {define_import,NA}, St3);
+ no -> St3
end
end.
+function_check_max_args(Line, Arity, St) when Arity > ?MAX_ARGUMENTS ->
+ add_error(Line, {too_many_arguments,Arity}, St);
+function_check_max_args(_, _, St) -> St.
+
%% clauses([Clause], VarTable, State) -> {VarTable, State}.
clauses(Cs, Vt, St) ->
diff --git a/lib/stdlib/test/erl_lint_SUITE.erl b/lib/stdlib/test/erl_lint_SUITE.erl
index d0c0d68b4a..c4158abf32 100644
--- a/lib/stdlib/test/erl_lint_SUITE.erl
+++ b/lib/stdlib/test/erl_lint_SUITE.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 1999-2010. All Rights Reserved.
+%% Copyright Ericsson AB 1999-2011. 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
@@ -54,7 +54,8 @@
otp_7550/1,
otp_8051/1,
format_warn/1,
- on_load/1, on_load_successful/1, on_load_failing/1
+ on_load/1, on_load_successful/1, on_load_failing/1,
+ too_many_arguments/1
]).
% Default timetrap timeout (set in init_per_testcase).
@@ -77,7 +78,7 @@ all(suite) ->
otp_5362, otp_5371, otp_7227, otp_5494, otp_5644, otp_5878, otp_5917, otp_6585,
otp_6885, export_all, bif_clash,
behaviour_basic, behaviour_multiple, otp_7550, otp_8051, format_warn,
- on_load].
+ on_load,too_many_arguments].
unused_vars_warn(suite) ->
[unused_vars_warn_basic, unused_vars_warn_lc, unused_vars_warn_rec,
@@ -2913,6 +2914,21 @@ on_load_failing(Config) when is_list(Config) ->
?line [] = run(Config, Ts),
ok.
+too_many_arguments(doc) ->
+ "Test that too many arguments is not accepted.";
+too_many_arguments(suite) -> [];
+too_many_arguments(Config) when is_list(Config) ->
+ Ts = [{too_many_1,
+ <<"f(_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_,_) -> ok.">>,
+ [],
+ {errors,
+ [{1,erl_lint,{too_many_arguments,256}}],[]}}
+ ],
+
+ ?line [] = run(Config, Ts),
+ ok.
+
+
run(Config, Tests) ->
F = fun({N,P,Ws,E}, BadL) ->
case catch run_test(Config, P, Ws) of
diff --git a/system/doc/efficiency_guide/advanced.xml b/system/doc/efficiency_guide/advanced.xml
index 2383e3cf3d..8126b93a2d 100644
--- a/system/doc/efficiency_guide/advanced.xml
+++ b/system/doc/efficiency_guide/advanced.xml
@@ -4,7 +4,7 @@
<chapter>
<header>
<copyright>
- <year>2001</year><year>2010</year>
+ <year>2001</year><year>2011</year>
<holder>Ericsson AB. All Rights Reserved.</holder>
</copyright>
<legalnotice>
@@ -200,7 +200,7 @@ On 64-bit architectures: 4 words for a reference from the current local node, an
<seealso marker="#ports">the maximum number of Erlang ports</seealso>
available, and operating system specific settings and limits.</item>
<tag><em>Number of arguments to a function or fun</em></tag>
- <item>256</item>
+ <item>255</item>
</taglist>
</section>
</chapter>
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 08:34:38 +0000