Date: Wed, 29 Sep 1999 13:01:33 +0600 From: Konstantin Chuguev <joy@urc.ac.ru> To: Alex Belits <abelits@phobos.illtel.denver.co.us> Cc: "Darren R. Davis" <drdavis@calderasystems.com>, Nate Williams <nate@mt.sri.com>, Scm486@aol.com, freebsd-hackers@FreeBSD.ORG Subject: Re: Netscape Bus Error Message-ID: <37F1B94D.7B215AF4@urc.ac.ru> References: <Pine.LNX.4.02A.9909281208490.18466-100000@phobos.illtel.denver.co.us>
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Alex Belits wrote:
> On Tue, 28 Sep 1999, Darren R. Davis wrote:
>
> > I believe that a Bus Error is specifically referencing miss aligned data vs
> > segmentation violation
> > (SIGSEGV) which is accessing data that is either free'd or not yours, etc.
> > I always thought
> > it strange on an Intel processor, since this was more a 68K/RISC thing.
> > The only penalty on Intel
> > was taking many more cycles to complete. Of course I haven't looked that
> > deeply at what the
> > code handling for the bus error signal really detects. But, never the
> > less, it is still a Netscape bug.
>
> It's SIGSEGV in disguise -- netscape intercepts it and generates SIGBUS:
> ---8<---
> abelits@es1840$ netscape&
> [1] 67114
> abelits@es1840$ kill -SEGV 67114
> abelits@es1840$ [1]+ Bus error netscape
>
> abelits@es1840$
> --->8---
>
Or Netscape crashes with SIGBUS in SIGSEGV handler? :-)
--
Konstantin V. Chuguev. System administrator of Southern
http://www.urc.ac.ru/~joy/ Ural Regional Center of FREEnet,
mailto:joy@urc.ac.ru Chelyabinsk, Russia.
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