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Postings from November 2003
> I have a module (Solaris::Kstat) which implements a tied hash entirely
> from XSUB code. This works fine in 5.6.1, but cores in 5.8.2.
I've done a bit more digging, and this is failing because in 5.6.1 I was
setting the keys & values of the tied hashes to be readonly, and this has
clashed with the way the 'Restricted hash' functionality introduced
post-5.6.1 which also uses the READONLY flags. The implementation of
restricted hashes isn't exactly clearly documented on perlguts, so I haven't
yet figured out exactly what I am doing wrong. I'm setting/unsetting
READONLY on the hashes themselves, and on the entries returned by
hv_fetch(), but obviously this isn't correct. I'm getting the SEGV in
Perl_hv_clear, here:
I32 i;
HE* entry;
for (i = 0; i <= (I32) xhv->xhv_max; i++) {
---> entry = ((HE**)xhv->xhv_array)[i];
because xhv->xhv_array is NULL - I have no idea why yet. Can anyone shed
any light on exactly how the READONLY flags are supposed to be set to get
the various restricted hash behaviours?
--
Alan Burlison
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