From ce20094582493203c8812cd003e3d3b080f88607 Mon Sep 17 00:00:00 2001 From: Hans Bolinder Date: Wed, 12 Mar 2014 09:17:17 +0100 Subject: Fix some Dialyzer warnings Dialyzer recognizes a certain pattern that makes it possible to get rid of 'The created fun has no local return' warnings. --- lib/debugger/src/dbg_iload.erl | 13 ++++++++----- lib/kernel/src/disk_log_server.erl | 12 ++++++++---- lib/kernel/src/global.erl | 22 +++++++++++++--------- lib/stdlib/src/erl_compile.erl | 18 ++++++++++-------- lib/stdlib/src/escript.erl | 10 +++++++++- 5 files changed, 48 insertions(+), 27 deletions(-) (limited to 'lib') diff --git a/lib/debugger/src/dbg_iload.erl b/lib/debugger/src/dbg_iload.erl index 266cf239dd..ad05a7c529 100644 --- a/lib/debugger/src/dbg_iload.erl +++ b/lib/debugger/src/dbg_iload.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1998-2010. All Rights Reserved. +%% Copyright Ericsson AB 1998-2014. 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 @@ -42,18 +42,21 @@ load_mod(Mod, File, Binary, Db) -> Flag = process_flag(trap_exit, true), - Pid = spawn_link(fun () -> load_mod1(Mod, File, Binary, Db) end), + Pid = spawn_link(load_mod1(Mod, File, Binary, Db)), receive {'EXIT', Pid, What} -> process_flag(trap_exit, Flag), What end. --spec load_mod1(atom(), file:filename(), binary(), ets:tid()) -> no_return(). +-spec load_mod1(atom(), file:filename(), binary(), ets:tid()) -> + fun(() -> no_return()). load_mod1(Mod, File, Binary, Db) -> - store_module(Mod, File, Binary, Db), - exit({ok, Mod}). + fun() -> + store_module(Mod, File, Binary, Db), + exit({ok, Mod}) + end. %%==================================================================== %% Internal functions diff --git a/lib/kernel/src/disk_log_server.erl b/lib/kernel/src/disk_log_server.erl index 684ea5b5db..45334912eb 100644 --- a/lib/kernel/src/disk_log_server.erl +++ b/lib/kernel/src/disk_log_server.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1997-2013. All Rights Reserved. +%% Copyright Ericsson AB 1997-2014. 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 @@ -199,7 +199,7 @@ do_open({open, W, #arg{name = Name}=A}=Req, From, State) -> false when W =:= local -> case A#arg.distributed of {true, Nodes} -> - Fun = fun() -> open_distr_rpc(Nodes, A, From) end, + Fun = open_distr_rpc_fun(Nodes, A, From), _Pid = spawn(Fun), %% No pending reply is expected, but don't reply yet. {pending, State}; @@ -225,11 +225,15 @@ do_open({open, W, #arg{name = Name}=A}=Req, From, State) -> end end. +-spec open_distr_rpc_fun([node()], _, _) -> % XXX: underspecified + fun(() -> no_return()). + +open_distr_rpc_fun(Nodes, A, From) -> + fun() -> open_distr_rpc(Nodes, A, From) end. + %% Spawning a process is a means to avoid deadlock when %% disk_log_servers mutually open disk_logs. --spec open_distr_rpc([node()], _, _) -> no_return(). % XXX: underspecified - open_distr_rpc(Nodes, A, From) -> {AllReplies, BadNodes} = rpc:multicall(Nodes, ?MODULE, dist_open, [A]), {Ok, Bad} = cr(AllReplies, [], []), diff --git a/lib/kernel/src/global.erl b/lib/kernel/src/global.erl index ef878b8d0c..0a4edea452 100644 --- a/lib/kernel/src/global.erl +++ b/lib/kernel/src/global.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1996-2013. All Rights Reserved. +%% Copyright Ericsson AB 1996-2014. 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 @@ -1513,14 +1513,18 @@ delete_global_name(_Name, _Pid) -> -record(him, {node, locker, vsn, my_tag}). start_the_locker(DoTrace) -> - spawn_link(fun() -> init_the_locker(DoTrace) end). - -init_the_locker(DoTrace) -> - process_flag(trap_exit, true), % needed? - S0 = #multi{do_trace = DoTrace}, - S1 = update_locker_known({add, get_known()}, S0), - loop_the_locker(S1), - erlang:error(locker_exited). + spawn_link(init_the_locker_fun(DoTrace)). + +-spec init_the_locker_fun(boolean()) -> fun(() -> no_return()). + +init_the_locker_fun(DoTrace) -> + fun() -> + process_flag(trap_exit, true), % needed? + S0 = #multi{do_trace = DoTrace}, + S1 = update_locker_known({add, get_known()}, S0), + loop_the_locker(S1), + erlang:error(locker_exited) + end. loop_the_locker(S) -> ?trace({loop_the_locker,S}), diff --git a/lib/stdlib/src/erl_compile.erl b/lib/stdlib/src/erl_compile.erl index ed8fea5d78..caed4d41d6 100644 --- a/lib/stdlib/src/erl_compile.erl +++ b/lib/stdlib/src/erl_compile.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1997-2013. All Rights Reserved. +%% Copyright Ericsson AB 1997-2014. 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 @@ -66,7 +66,7 @@ my_halt(Reason) -> compile(List) -> process_flag(trap_exit, true), - Pid = spawn_link(fun() -> compiler_runner(List) end), + Pid = spawn_link(compiler_runner(List)), receive {'EXIT', Pid, {compiler_result, Result}} -> Result; @@ -79,14 +79,16 @@ compile(List) -> error end. --spec compiler_runner([cmd_line_arg()]) -> no_return(). +-spec compiler_runner([cmd_line_arg()]) -> fun(() -> no_return()). compiler_runner(List) -> - %% We don't want the current directory in the code path. - %% Remove it. - Path = [D || D <- code:get_path(), D =/= "."], - true = code:set_path(Path), - exit({compiler_result, compile1(List)}). + fun() -> + %% We don't want the current directory in the code path. + %% Remove it. + Path = [D || D <- code:get_path(), D =/= "."], + true = code:set_path(Path), + exit({compiler_result, compile1(List)}) + end. %% Parses the first part of the option list. diff --git a/lib/stdlib/src/escript.erl b/lib/stdlib/src/escript.erl index 35f6dff57e..a8a82272d6 100644 --- a/lib/stdlib/src/escript.erl +++ b/lib/stdlib/src/escript.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 2007-2013. All Rights Reserved. +%% Copyright Ericsson AB 2007-2014. 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 @@ -289,6 +289,8 @@ start(EscriptOptions) -> my_halt(127) end. +-spec parse_and_run(_, _, _) -> no_return(). + parse_and_run(File, Args, Options) -> CheckOnly = lists:member("s", Options), {Source, Module, FormsOrBin, HasRecs, Mode} = @@ -727,6 +729,8 @@ epp_parse_file2(Epp, S, Forms, Parsed) -> %% Evaluate script %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +-spec debug(_, _, _) -> no_return(). + debug(Module, AbsMod, Args) -> case hidden_apply(debugger, debugger, start, []) of {ok, _} -> @@ -742,6 +746,8 @@ debug(Module, AbsMod, Args) -> fatal("Cannot start the debugger") end. +-spec run(_, _) -> no_return(). + run(Module, Args) -> try Module:main(Args), @@ -751,6 +757,8 @@ run(Module, Args) -> fatal(format_exception(Class, Reason)) end. +-spec interpret(_, _, _, _) -> no_return(). + interpret(Forms, HasRecs, File, Args) -> %% Basic validation before execution case erl_lint:module(Forms) of -- cgit v1.2.3 From 69acde6d5415c770e22dafdfdf92608193151111 Mon Sep 17 00:00:00 2001 From: Hans Bolinder Date: Thu, 13 Mar 2014 10:00:21 +0100 Subject: Correct the contract of io:getopts() --- lib/stdlib/src/io.erl | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) (limited to 'lib') diff --git a/lib/stdlib/src/io.erl b/lib/stdlib/src/io.erl index b11d41e2eb..27e2a82b41 100644 --- a/lib/stdlib/src/io.erl +++ b/lib/stdlib/src/io.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1996-2013. All Rights Reserved. +%% Copyright Ericsson AB 1996-2014. 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 @@ -177,13 +177,15 @@ get_password(Io) -> | {'expand_fun', expand_fun()} | {'encoding', encoding()}. --spec getopts() -> [opt_pair()]. +-spec getopts() -> [opt_pair()] | {'error', Reason} when + Reason :: term(). getopts() -> getopts(default_input()). --spec getopts(IoDevice) -> [opt_pair()] when - IoDevice :: device(). +-spec getopts(IoDevice) -> [opt_pair()] | {'error', Reason} when + IoDevice :: device(), + Reason :: term(). getopts(Io) -> request(Io, getopts). -- cgit v1.2.3 From e2733e0dfe107e2f48c083841ffd128bcbf0abef Mon Sep 17 00:00:00 2001 From: Hans Bolinder Date: Thu, 13 Mar 2014 11:47:31 +0100 Subject: test_server: Fix a Dialyzer warning --- lib/test_server/src/test_server_sup.erl | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'lib') diff --git a/lib/test_server/src/test_server_sup.erl b/lib/test_server/src/test_server_sup.erl index 3cfa84a52f..96e369a138 100644 --- a/lib/test_server/src/test_server_sup.erl +++ b/lib/test_server/src/test_server_sup.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1998-2013. All Rights Reserved. +%% Copyright Ericsson AB 1998-2014. 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 @@ -469,7 +469,7 @@ check_instruction(_, {add_application, Application, Type}, _, _) -> check_instruction(_, Instr, _, _) -> throw({error, {low_level_or_invalid_instruction, Instr}}). -check_module(Module, Modules) when is_atom(Module) -> +check_module(Module, Modules) -> case {is_atom(Module), lists:member(Module, Modules)} of {true, true} -> ok; {true, false} -> throw({error, {unknown_module, Module}}); -- cgit v1.2.3