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 (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers