home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!caen!sdd.hp.com!hpsdr160.sdd.hp.com!user
- From: marshall@sdd.hp.com (Marshall Clow)
- Newsgroups: comp.sys.mac.programmer
- Subject: Re: Does anyone recognize _Jackson?
- Followup-To: comp.sys.mac.programmer,comp.sys.mac.system
- Date: 4 Sep 1992 16:22:21 GMT
- Organization: Hewlett Packard San Diego Printer Division
- Lines: 33
- Distribution: world
- Message-ID: <marshall-040992091550@hpsdr160.sdd.hp.com>
- References: <1992Sep4.133844.20178@dartvax.dartmouth.edu>
- NNTP-Posting-Host: hpsdr160.sdd.hp.com
-
- In article <1992Sep4.133844.20178@dartvax.dartmouth.edu>,
- Roger.W.Brown@dartmouth.edu (Roger W. Brown) wrote:
- >
- > I frequently see this symbol in MacsBug when my Quadra crashes:
- > _Jackson. I haven't looked through the Tech Notes yet. I wondered if
- > anyone knows what it is. It does something with color icons. I just
- > want to know that it isn't a virus, and maybe that it is from an
- > extension that may be causing trouble.
- >
- > --------------------------------------------------------------------
- > Roger Brown roger.brown@dartmouth.edu
- > Software Development
- > Kiewit Computation Center, Dartmouth College, Hanover, NH
-
- It isn't a virus. Look closely, and you will notice that the address that
- you are looking at is in ROM.
-
- On my Quadra 900:
- $4083143A: JACKSONPOLLOCK _Debugger
- $4083143C: RNEWHANDLE _NewHandle, SYS, CLEAR
- $4083143E: RNEWHANDLE + $0002 BNE.S $40831432
- and so on.....
-
- It's where QuickDraw jumps to if it gets an error that it can't recover
- from (mostly when it runs out of memory). Never, never, do region
- operations
- where you could possibly not have enough memory!
-
- Marshall Clow
- San Diego Printer Division Hewlett Packard
- Internet: marshall@sdd.hp.com AppleLink: HP.Marshall AOL: MClow
-
- P.S. "Jackson Pollock" was the code name for 32-bit QuickDraw.
-