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Message-ID:	<52110E7E.4000105@cs.utoronto.ca>
Date:	Sun, 18 Aug 2013 14:12:14 -0400
From:	Ryan Johnson <ryan DOT johnson AT cs DOT utoronto DOT ca>
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To:	cygwin AT cygwin DOT com
Subject:	Re: emacs-nox hogs CPU if backgrounded during compile
References:	<520FC3DC DOT 4010700 AT cs DOT utoronto DOT ca> <20130818045342 DOT GA1639 AT ednor DOT casa DOT cgf DOT cx>
In-Reply-To:	<20130818045342.GA1639@ednor.casa.cgf.cx>

On 18/08/2013 12:53 AM, Christopher Faylor wrote:
> On Sat, Aug 17, 2013 at 02:41:32PM -0400, Ryan Johnson wrote:
>> The following STC causes emacs-nox to peg a CPU indefinitely. Emacs
>> remains responsive, but C-c C-k doesn't kill the compile; you have to
>> exit emacs to remove the "Compiling" status. Killing the buffer or
>> starting a new compile offers to kill the offending process, but doesn't.
>>
>> Attaching gdb shows an endless loop inside
>> kernelbase.dll!RaiseException, but provides no other clues that I could see.
> I don't know if this trick works on 64-bit Cygwin or not but you could try:
>
> set $rsp=$rbp
> bt
>
> And, if you get something sensible try it on every thread.
(gdb) p $rbp
$5 = (void *) 0x16

Ryan


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