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From: di@athena.mit.edu (David Israel)
Newsgroups: comp.windows.x
Subject: Re: Sun 386i server bug
Message-ID: <1991Mar19.233244.4272@athena.mit.edu>
Date: 19 Mar 91 23:32:44 GMT
References: <4343@gmdzi.gmd.de>
Sender: news@athena.mit.edu (News system)
Organization: Massachusetts Institute of Technology
Lines: 52

In article <4343@gmdzi.gmd.de> mayer@gmdzi.gmd.de (Hans Mayer) writes:
>Environment:
>Sun 386i, os 4.0.2, X11R4 patchlevel 18
>
>The recently posted tgif-2.1 is capable of crashing a sun386i color server.
>I don't know if it is a bug in the generic color code or if it is 386i
>specific because I have no other color system to test.
>The crash is not reproducible on a sun3/80 with b/w monitor and server.
>
>{venus:6} dbx /usr/local/bin/X11/Xsun core
>Reading symbolic information...
>Read 2017 symbols
>stack overwritten
>program terminated by signal SEGV (no mapping at the fault address)
>(dbx) where
>miPolyBuildEdge(0x0, 0x1, 0x0, 0x0, 0x0, 0x1e2, 0x70, 0x30, 0x1e0, 0x80, 0x1, 0xfbfffff0) at 0x5d725
>miPolyBuildPoly(0xfbfffabc, 0xfbfffa7c, 0x3, 0x1e0, 0x80, 0xfbfffa08, 0xfbfff998, 0xfbfff994, 0xfbfff990, 0xfbfff988) at 0x5da9d
>warning: core file read error: data space address too high
>warning: core file read error: data space address too high
>miLineJoin() at 0x5dfc8
>stack overwritten
>
>Any help appreciated. Thanks - Hans
>

I suspect that this is a 386i Server bug.  By coincidence, I discovered 
today on a color 386i running SunOs 4.0.1 and X11R4, that the 3-D plotting
program "pdraw" (available from export.lcs.mit.edu in "3dplot.tar.Z") 
causes a nearly identical core-dump:

dbx /usr/local/X11R4/usr/bin/X11/Xsun core
Reading symbolic information...
Read 2028 symbols
stack overwritten
(dbx) where
miPolyBuildEdge(0x0, 0x1, 0x0, 0x0, 0xffffffff, 0x80000000, 0x153, 0xffffffd3, 0
x153, 0x135, 0x1, 0xfbfffffc) at 0x5e35e
miPolyBuildPoly(0xfbfffa20, 0xfbfff9e0, 0x3, 0x153, 0x135, 0xfbfff96c, 0xfbfff8f
c, 0xfbfff8f8, 0xfbfff8f4, 0xfbfff8ec) at 0x5e6d1
warning: core file read error: data space address too high
warning: core file read error: data space address too high
miLineJoin() at 0x5ebfc
stack overwritten
(dbx) quit

I have confirmed that pdraw has no trouble on at least one other
server.  Other than confirming that this is a bug in the 386i server, 
I'm not able to help -- has anybody fixed this?  If not, would any 
server hackers care to venture a guess as to where the problem lies?
Thanks.

David Israel (di@hstbme.mit.edu)