Andres Freund <and...@anarazel.de> writes:
> The best theory I have so far that I have is that slab.c's idea of
> StandardChunkHeader's size doesn't match what mcxt.c think it is
> (because slab.c simply embeds StandardChunkHeader, but mcxt uses
> MAXALIGN(sizeof(StandardChunkHeader))). That's not good, but I don't
> quite see how that'd cause the issue, since StandardChunkHeader's size
> should always be properly sized.
Uh, wrong. On a 32-bit machine with debug enabled, StandardChunkHeader
will contain 3 4-byte fields. However, there are some such machines on
which MAXALIGN is 8. For example, looking at termite's configure
output:
checking size of void *... 4
checking size of size_t... 4
checking size of long... 4
checking alignment of short... 2
checking alignment of int... 4
checking alignment of long... 4
checking alignment of long long int... 8
checking alignment of double... 8
axolotl's output looks similar. I expect my old HPPA dinosaur
will show the failure as well.
regards, tom lane
--
Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-hackers
