From owner-freebsd-hackers  Mon Oct 29  4:30:25 2001
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To: k Macy <kip_macy@yahoo.com>
Cc: freebsd-hackers@freebsd.org
Subject: Re: problems with recurring SIGTRAP under gdb 
In-Reply-To: Your message of "Sun, 28 Oct 2001 18:37:46 PST."
             <20011029023746.94559.qmail@web14001.mail.yahoo.com> 
Date: Mon, 29 Oct 2001 12:30:22 +0000
From: Ian Dowse <iedowse@maths.tcd.ie>
Message-ID:  <200110291230.aa64062@salmon.maths.tcd.ie>
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In message <20011029023746.94559.qmail@web14001.mail.yahoo.com>, k Macy writes:
>Any idea why when I insert a breakpoint I get a
>SIGTRAP 
>and can't continue any further? Is this a bug in the 

I've seen this on applications that use SIGIO on stdin. If this is the
case, a workaround is to disable the SIGIO signal while using the
debugger, e.g:

	(gdb) set $oldsigio = signal(23, (void *)1)

The signal handler can be put back later with:

	call signal(23, (void *)$oldsigio)

Ian

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