Date: Sat, 26 Oct 1996 06:39:38 +1000 From: davidn@sdev.usn.blaze.net.au (David Nugent) To: ejc@gargoyle.bazzle.com (Eric J. Chet) Cc: freebsd-current@FreeBSD.ORG Subject: Re: -current as of 10/23/96 Message-ID: <199610252039.GAA28193@sdev.usn.blaze.net.au> In-Reply-To: <Pine.BSF.3.95.961024195811.2302A-100000@gargoyle.bazzle.com>; from Eric J. Chet on Oct 24, 1996 20:16:37 -0400 References: <Pine.BSF.3.95.961024195811.2302A-100000@gargoyle.bazzle.com>
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Eric J. Chet writes:
> Make world as of last night 10/23/96. Can't login using pdksh
> it dumps with sig 11, csh and tcsh are fine. I rebuilt ksh same result.
> It only dumps at login, works fine from another shell.
I had the same result, but since I was busy on something else I just
changed shell and thought I'd get back to it when I had time to download
the pdksh sources again. However, since you've done most of the work
already:
> Program terminated with signal 11, Segmentation fault.
> #0 shf_close (shf=0xd0d0d0d0) at shf.c:203
> 203 if (shf->fd >= 0) {
Do you happen to have /etc/malloc.conf symlinked to 'AD'? (BTW, this
has been a *wonderful* help in debugging things I previously never
realised had problems over the last few days :-)).
If so, then the pattern 0xd0d0d0d0 means that it is an uninitialised
value or a variable that previously existed in memory that has been
subsequently freed. It is more likely you'll discover how this happens
in frame 2:
> #2 0x16397 in main (argc=1, argv=0xefbfde54) at main.c:359
Somewhere above there.
To point out the obvious, this most likely a bug in pdksh. :)
The most likely scenario is something like this:
free(xyz);
shf_close(xyz->shf);
Or perhaps the programmer is as not initialising memory after allocating
it. As I said, I haven't looked yet. If you come across the fix, be sure
to cc me the patch. :)
Hope this helps,
David Nugent, Unique Computing Pty Ltd - Melbourne, Australia
Voice +61-3-791-9547 Data/BBS +61-3-792-3507 3:632/348@fidonet
davidn@blaze.net.au http://www.blaze.net.au/~davidn
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