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To: cygwin AT cygwin DOT com
Subject: Re: Debugging sub-processes with gdb
References: <f5boaz0e6qb DOT fsf AT troutbeck DOT inf DOT ed DOT ac DOT uk>	<20140514152505 DOT GB6620 AT ednor DOT casa DOT cgf DOT cx>
From: ht AT inf DOT ed DOT ac DOT uk (Henry S. Thompson)
Date: Wed, 14 May 2014 16:36:59 +0100
In-Reply-To: <20140514152505.GB6620@ednor.casa.cgf.cx> (Christopher Faylor's message of "Wed\, 14 May 2014 11\:25\:05 -0400")
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Christopher Faylor writes:

> On Wed, May 14, 2014 at 04:10:36PM +0100, Henry S. Thompson wrote:
>>I'm trying to debug a problem with xemacs that involves the child
>>process forked when you execute M-x shell.
>>
>>None of the mechanisms in the gdb documentation for choosing to step
>>into the child process (instead of the parent) after a fork() seem to
>>work for me.  That is, in particular, setting follow-for-mode to child
>>still leaves me in the parent after stepping over a fork().
>>
>>Setting detach-on-fork to 'off' also seems to have no effect.
>>
>>Have I misunderstood something, or does this aspect of gdb just not
>>work under cygwin (x86_64, 1.7.29-2)?
>
> Debugging subprocesses doesn't work for Windows gdb.  Sorry.

Thanks for confirming.

> If you have control over the code you could have it print a pid, wait,
> and then attach to it with gdb.  That works.

Understood, will do.

ht
-- 
       Henry S. Thompson, School of Informatics, University of Edinburgh
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