Can't get a core file
Martyn Johnson
maj at cl.cam.ac.uk
Wed Dec 6 20:49:55 AEST 1989
VAX Ultrix 3.0 had at least two kernel bugs which messed up core dumps.
One of these provoked exactly the effect you describe; it was a vulgar
bug in the access checking routines which were confused by the EINTR
lying around in u.u_error.
Digital fixed at least one, possibly both, of the bugs on the VAX in
maintenance release 3.1 (the reason I'm not sure is that I actually fixed
them myself in the source and still run 3.0).
The fixes don't seem to have reached RISC Ultrix. The problem you
describe is present in release 3.1A for the 5400. The fixes are trivial
at the source level, so all it takes is for somebody to persuade Digital
to actually release a patch or something.
Martyn Johnson maj at cl.cam.ac.uk
University of Cambridge Computer Lab
New Museums Site
Pembroke Steet
Cambridge
CB2 3QG
UK
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