diff options
Diffstat (limited to 'lib/stdlib/src/gen_event.erl')
| -rw-r--r-- | lib/stdlib/src/gen_event.erl | 42 |
1 files changed, 31 insertions, 11 deletions
diff --git a/lib/stdlib/src/gen_event.erl b/lib/stdlib/src/gen_event.erl index 1b30aaf5eb..b1e9e3a02f 100644 --- a/lib/stdlib/src/gen_event.erl +++ b/lib/stdlib/src/gen_event.erl @@ -1,19 +1,19 @@ %% %% %CopyrightBegin% -%% -%% Copyright Ericsson AB 1996-2009. All Rights Reserved. -%% +%% +%% Copyright Ericsson AB 1996-2010. 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 %% compliance with the License. You should have received a copy of the %% Erlang Public License along with this software. If not, it can be %% retrieved online at http://www.erlang.org/. -%% +%% %% Software distributed under the License is distributed on an "AS IS" %% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See %% the License for the specific language governing rights and limitations %% under the License. -%% +%% %% %CopyrightEnd% %% -module(gen_event). @@ -42,7 +42,6 @@ system_continue/3, system_terminate/4, system_code_change/4, - print_event/3, format_status/2]). -import(error_logger, [error_msg/2]). @@ -239,7 +238,7 @@ fetch_msg(Parent, ServerName, MSL, Debug, Hib) -> Msg when Debug =:= [] -> handle_msg(Msg, Parent, ServerName, MSL, []); Msg -> - Debug1 = sys:handle_debug(Debug, {?MODULE, print_event}, + Debug1 = sys:handle_debug(Debug, fun print_event/3, ServerName, {in, Msg}), handle_msg(Msg, Parent, ServerName, MSL, Debug1) end. @@ -678,12 +677,23 @@ report_error(Handler, Reason, State, LastIn, SName) -> _ -> Reason end, + Mod = Handler#handler.module, + FmtState = case erlang:function_exported(Mod, format_status, 2) of + true -> + Args = [get(), State], + case catch Mod:format_status(terminate, Args) of + {'EXIT', _} -> State; + Else -> Else + end; + _ -> + State + end, error_msg("** gen_event handler ~p crashed.~n" "** Was installed in ~p~n" "** Last event was: ~p~n" "** When handler state == ~p~n" "** Reason == ~p~n", - [handler(Handler),SName,LastIn,State,Reason1]). + [handler(Handler),SName,LastIn,FmtState,Reason1]). handler(Handler) when not Handler#handler.id -> Handler#handler.module; @@ -712,10 +722,20 @@ get_modules(MSL) -> %%----------------------------------------------------------------- %% Status information %%----------------------------------------------------------------- -format_status(_Opt, StatusData) -> - [_PDict, SysState, Parent, _Debug, [ServerName, MSL, _Hib]] = StatusData, +format_status(Opt, StatusData) -> + [PDict, SysState, Parent, _Debug, [ServerName, MSL, _Hib]] = StatusData, Header = lists:concat(["Status for event handler ", ServerName]), + FmtMSL = [case erlang:function_exported(Mod, format_status, 2) of + true -> + Args = [PDict, State], + case catch Mod:format_status(Opt, Args) of + {'EXIT', _} -> MSL; + Else -> MS#handler{state = Else} + end; + _ -> + MS + end || #handler{module = Mod, state = State} = MS <- MSL], [{header, Header}, {data, [{"Status", SysState}, {"Parent", Parent}]}, - {items, {"Installed handlers", MSL}}]. + {items, {"Installed handlers", FmtMSL}}]. |