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. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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