diff options
Diffstat (limited to 'lib/kernel/src/error_logger.erl')
| -rw-r--r-- | lib/kernel/src/error_logger.erl | 115 |
1 files changed, 110 insertions, 5 deletions
diff --git a/lib/kernel/src/error_logger.erl b/lib/kernel/src/error_logger.erl index eb231fd155..585507c545 100644 --- a/lib/kernel/src/error_logger.erl +++ b/lib/kernel/src/error_logger.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1996-2013. All Rights Reserved. +%% Copyright Ericsson AB 1996-2017. All Rights Reserved. %% %% Licensed under the Apache License, Version 2.0 (the "License"); %% you may not use this file except in compliance with the License. @@ -31,6 +31,8 @@ handle_event/2, handle_call/2, handle_info/2, terminate/2]). +-export([get_format_depth/0, limit_term/1]). + -define(buffer_size, 10). %%----------------------------------------------------------------- @@ -360,8 +362,12 @@ init(Max) when is_integer(Max) -> %% go back. init({go_back, _PostState}) -> {ok, {?buffer_size, 0, []}}; -init(_) -> %% Start and just relay to other - {ok, []}. %% node if node(GLeader) =/= node(). +init(_) -> + %% The error logger process may receive a huge amount of + %% messages. Make sure that they are stored off heap to + %% avoid exessive GCs. + process_flag(message_queue_data, off_heap), + {ok, []}. -spec handle_event(term(), state()) -> {'ok', state()}. @@ -435,5 +441,104 @@ add_node(X, Pid) -> %% Can't do io_lib:format -display2(Tag,F,A) -> - erlang:display({error_logger,Tag,F,A}). +display2({{_Y,_Mo,_D},{_H,_Mi,_S}} = Date, F, A) -> + display_date(Date), + display3(string_p(F), F, A). + +display_date({{Y,Mo,D},{H,Mi,S}}) -> + erlang:display_string( + integer_to_list(Y) ++ "-" ++ + two_digits(Mo) ++ "-" ++ + two_digits(D) ++ " " ++ + two_digits(H) ++ ":" ++ + two_digits(Mi) ++ ":" ++ + two_digits(S) ++ " "). + +two_digits(N) when 0 =< N, N =< 9 -> + [$0, $0 + N]; +two_digits(N) -> + integer_to_list(N). + +display3(true, F, A) -> + %% Format string with arguments + erlang:display_string(F ++ "\n"), + [begin + erlang:display_string("\t"), + erlang:display(Arg) + end || Arg <- A], + ok; +display3(false, Atom, A) when is_atom(Atom) -> + %% The widest atom seems to be 'supervisor_report' at 17. + ColumnWidth = 20, + AtomString = atom_to_list(Atom), + AtomLength = length(AtomString), + Padding = lists:duplicate(ColumnWidth - AtomLength, $\s), + erlang:display_string(AtomString ++ Padding), + display4(A); +display3(_, F, A) -> + erlang:display({F, A}). + +display4([A, []]) -> + %% Not sure why crash reports look like this. + display4(A); +display4(A = [_|_]) -> + case lists:all(fun({Key,_Value}) -> is_atom(Key); (_) -> false end, A) of + true -> + erlang:display_string("\n"), + lists:foreach( + fun({Key, Value}) -> + erlang:display_string( + " " ++ + atom_to_list(Key) ++ + ": "), + erlang:display(Value) + end, A); + false -> + erlang:display(A) + end; +display4(A) -> + erlang:display(A). + +string_p([]) -> + false; +string_p(Term) -> + string_p1(Term). + +string_p1([H|T]) when is_integer(H), H >= $\040, H =< $\176 -> + string_p1(T); +string_p1([H|T]) when is_integer(H), H >= 16#A0, H < 16#D800; + is_integer(H), H > 16#DFFF, H < 16#FFFE; + is_integer(H), H > 16#FFFF, H =< 16#10FFFF -> + string_p1(T); +string_p1([$\n|T]) -> string_p1(T); +string_p1([$\r|T]) -> string_p1(T); +string_p1([$\t|T]) -> string_p1(T); +string_p1([$\v|T]) -> string_p1(T); +string_p1([$\b|T]) -> string_p1(T); +string_p1([$\f|T]) -> string_p1(T); +string_p1([$\e|T]) -> string_p1(T); +string_p1([H|T]) when is_list(H) -> + case string_p1(H) of + true -> string_p1(T); + _ -> false + end; +string_p1([]) -> true; +string_p1(_) -> false. + +-spec limit_term(term()) -> term(). + +limit_term(Term) -> + case get_format_depth() of + unlimited -> Term; + D -> io_lib:limit_term(Term, D) + end. + +-spec get_format_depth() -> 'unlimited' | pos_integer(). + +get_format_depth() -> + case application:get_env(kernel, error_logger_format_depth) of + {ok, Depth} when is_integer(Depth) -> + max(10, Depth); + undefined -> + unlimited + end. |