1.5.24-2: Applications automatically restart on crash

[Dave Korn]

Christopher Morlier wrote on 25 March 2008 20:08:

> Hi Everyone,
> For a couple of years I have noticed that when I run programs from
> within Cygwin (currently 1.5.24-2), if the program crashes (ie segfault)
> then the program gets automatically restarted.  This is primarily a
> problem when compiling/testing a windows program I am developing
> (compiled with MSVC), as I have to wait for the program to
> restart so I
> can shut it down. It seems like this hasn't always been the behavior,
> although it has been for several years (in the past, it just didn't
> effect me as much). 

  Yep.  Because it's a non-cygwin child process, cygwin doesn't realise it's
started and crashed, it thinks the process creation suffered a temporary
failure and has up to 5 retries.

> 
> I was wondering, is this a bug or a feature? 

  Feature.

> And if it is a
> feature is there a way to prevent it from happening?

  Recompile the dll, with attention to sigproc.cc:

int child_info::retry_count = 10;

and the way that child_info::proc_retry decrements the 'retry' counter which
is initialised to that value.

  See also the thread at
http://cygwin.com/ml/cygwin-patches/2008-q1/msg00063.html
and particularly
http://cygwin.com/ml/cygwin-patches/2008-q1/msg00066.html


    cheers,
      DaveK
-- 
Can't think of a witty .sigline today....


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