Date: Fri, 20 Feb 2009 12:13:03 -0500
From: Christopher Faylor <cgf-use-the-mailinglist-please@cygwin.com>
To: cygwin@cygwin.com
Subject: Re: Strange freezes when using gdb (rxvt/mintty but not dos box)
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On Fri, Feb 20, 2009 at 04:45:00PM +0000, Dave Korn wrote:
>Roland Schwingel wrote:
>>gdb freezes upon execution of the inferior process when used from
>>within mintty/rxvt, but does not freeze when gdb is invoked from a
>>(conventional) bash inside of a windows DOS box.
>
>>The application I want to debug is compiled for mingw.
>
>You're trying to use a Cygwin GDB to cross-debug a MinGW (== plain old
>win32) application.  Dunno if that's completely guaranteed to work, but
>it probably should for simple programs.

Yes, it should work fine.

>>So I assume some threading issues here in communication with the
>>console/terminal from multiple threads...
>
>Assumption probably wrong.
>
>>But why does it work with DOS box and not using mintty/rxvt???
>
>Clue here.  You are launching a win32 app, from a cygwin app, in a
>(non-console-based) GUI window.  Won't work.  Use a console.  See
>discussions around CYGWIN=tty for full details (which, if you had it
>set, ought to make the crash occur in a console as well as in
>rxvt/mintty, but isn't anything you can turn off for rxvt and get it
>working).

Right on, Dave.  There are all sorts of potential problems with using
a cygwin pty/tty and a mingw process.

So: what he said.

cgf

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