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Re: mach panics

On Tue, 28 Aug 2001, John Reese wrote:

> If you see this twice, it's because from-address based authentication
> on mailing lists is completely broken.

For whatever it's worth, you should see how much spam you're not getting
as a result. (I'm the one who has to click 'reject' or 'accept' for each
of them.) Rest assured that I do try to actually forward things to the
list as often as I can.

Here's a list of what has bounced in the last week (approx.):

1. SPAM: Your Vacation Winning .
2. : Re: install without MacOS?
3. DUPE: mach panics
4. SPAM: Re: Winning Confirmation
5. SPAM: Michael Chrustowicz/MAG/EMEA/APCC is out of the office.
6. SPAM: Enter To Win One of 25 Dream Vacations!! ..

You'll note that three are blatant spam, one is a broken autoresponder
(which might as well be spam), one is a dupe, and exactly one message out
of six actually got approved (#2), and that one may be a dupe, I just
don't have time to search the archive. In other words, it may be
annoying, but it saves you a -lot- of junk mail. :-)



> I'm running:
> MkLinux R1-pre
> Mach 3.0 VERSION(GENERIC_8.): root <osfmk>; Thu Feb 10 15:19:10 PST 2000; mach_kernel/PRODUCTION (build.mklinux.org)
> vmlinux-000203 (development kernel)

That was a goof, since that's Generic #09a2. I need to fix that in the
builds someday.


> on a PowerMac 7100/80 with 80 MB memory.
>
> Opera 5.0, the web browser, regularly causes the machine to panic,
> with a message which includes the following traceback:
>
> 0021d5b8 00231cd0 002149b4 0020c23c 00263ec0 73616d42 17c159f8 100ff6f0
> 100d8e24 10005610 10006108 100f383c 100f3a48 100d4ea8 100eec78 00000000

Ewww. I'll file it in my bug list. From a trivial inspection, the linux
server is doing a call into mach, but not a part of mach I usually look
at. I'm thinking it may be thread-oriented. But that's just going from
my vague recollection of the backtrace numbers. I could be wrong.

Unfortunately, I can't find a map file for that linux server, but I can at
least decode the mach part.

21d5b8: 0021d588 T host_reboot
231cd0: 00231c9c T _Xhost_reboot
2149b4: 00214864 T ipc_kobject_server
20c23c: 0020b690 T mach_msg_overwrite_trap
263ec0: 00263bf0 T shandler

Oh, great. That part is useless. I can't find any system map files newer
than 2.0.35. They may all be on a machine that no longer exists, or it
may be under Linux on my G4 at home (which is currently running Mac OS X.
I'll try to check tonight.


> 73616d42 17c159f8 100ff6f0
> 100d8e24 10005610 10006108 100f383c 100f3a48 100d4ea8 100eec78 00000000

The best I could do was GENERIC #08 (the real one), in which case this
backtrace would involve the HFS code calling the ppp code, which is
obviously wrong. If I can't come up with a better answer, I'll build
another linux server and put it and its system map out where you can get
them. I'm not sure what happened to all my system map files.... I do
seem to have everything from Generic #08 back to the dawn of time,
though. Grrrrr.


David

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References: 
 >mach panics (From: John Reese <email@hidden>)



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