[erlang-questions] Code upgrade messages

Éric Pailleau <>
Mon Jun 8 20:53:30 CEST 2015


Hi,
Catch a special case on code_server module upgrade... ;-) 

Le 8 juin 2015 12:20, Marc Worrell <> a écrit :
>
> Hi, 
>
> Thanks for the suggestions and the idea to trace the code_server. 
> I have checked the code_server source code, and added a trace on the post_beam_load/1 function. 
>
>
>     erlang:trace_pattern( 
>                   {code_server, post_beam_load, '_'}, 
>                   [{'_',[],[{return_trace}]}],  % dbg:fun2ms(fun(_) -> return_trace() end) 
>                   [local]), 
>     erlang:trace(whereis(code_server), true, [call]), 
>
>
> Now is hoping that that function is “stable” between releases :) 
>
> Thanks, 
>
> Marc 
>
>
> > On 6 jun. 2015, at 01:52, Éric Pailleau <> wrote: 
> > 
> > Hi, 
> > You may 'simply' have to trace 
> > delete_module(Module) 
> > used by code server, with dbg or other tracing tools... And catch the Module name. 
> > 
> > Le 5 juin 2015 10:17, Marc Worrell <> a écrit : 
> >> 
> >> Hi, 
> >> 
> >> For Zotonic we would love to be able to know if any Erlang module got a code upgrade (by loading a new version). 
> >> This because we use the list of exported functions to hook the module into the internal notification systems. 
> >> 
> >> Is it possible to have a process that receives a code-upgrade notification for any module in the running Erlang beam.smp? 
> >> 
> >> Best, 
> >> 
> >> Marc 
> >> _______________________________________________ 
> >> erlang-questions mailing list 
> >>  
> >> http://erlang.org/mailman/listinfo/erlang-questions 
>


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