Path: utzoo!utgpu!watserv1!watmath!att!att!linac!pacific.mps.ohio-state.edu!zaphod.mps.ohio-state.edu!rpi!batcomputer!riley
From: riley@batcomputer.tn.cornell.edu (Daniel S. Riley)
Newsgroups: comp.sys.dec
Subject: Re: Unaligned accesses on a DECstation 3100/Ultrix 4.0
Keywords: Disable the alignment fixer?
Message-ID: <1990Nov28.221219.15331@batcomputer.tn.cornell.edu>
Date: 28 Nov 90 22:12:19 GMT
References: <11824@spool.cs.wisc.edu> <1990Nov28.140934.17734@decuac.dec.com>
Organization: Cornell Theory Center
Lines: 21

In article <1990Nov28.140934.17734@decuac.dec.com> mjr@hussar.dco.dec.com (Marcus J. Ranum) writes:
>elliott@veronica.cs.wisc.edu (James Elliott) writes:
>
>>Now, my problem is that I want to get >rid< of these unaligned
>>accesses, because I consider them bugs.
>
>	Amen! The way I used to catch them (this is GROSS) was by doing
>what amounted to a binary search with the debugger. I'd set breakpoints
>and slowly home in on it until I isolated it.

From a posting by Jeff Michaud (michaud@decwrl.dec.com) from a little
over a year ago:

	Finding them is pretty easy.  dbx the offending program, then

		dbx> 0xNNNNNN/10i

	will tell you the routine-name:linenumber of the offending source line.

-Dan Riley (riley@theory.tn.cornell.edu, cornell!batcomputer!riley)
-Wilson Lab, Cornell University