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David Rowley 6f3820f37a Fix race condition in TupleDescCompactAttr assert code ... 5983a4cff added CompactAttribute as an abbreviated alternative to FormData_pg_attribute to allow more cache-friendly processing in tasks related to TupleDescs. That commit contained some assert-only code to check that the CompactAttribute had been populated correctly, however, the method used to do that checking caused the TupleDesc's CompactAttribute to be zeroed before it was repopulated and compared to the snapshot taken before the memset call. This caused issues as the type cache caches TupleDescs in shared memory which can be used by multiple backend processes at the same time. There was a window of time between the zero and repopulation of the CompactAttribute where another process would mistakenly think that the CompactAttribute is invalid due to the memset. To fix this, instead of taking a snapshot of the CompactAttribute and calling populate_compact_attribute() and comparing the snapshot to the freshly populated TupleDesc's CompactAttribute, refactor things so we can just populate a temporary CompactAttribute on the stack. This way we don't touch the TupleDesc's memory. Reported-by: Alexander Lakhin, SQLsmith Discussion: https://postgr.es/m/ca3a256a-5d12-42db-aabe-a75a030d9fb9@gmail.com		1 year ago
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backend	Fix race condition in TupleDescCompactAttr assert code	1 year ago
bin	Try to avoid semaphore-related test failures on NetBSD/OpenBSD.	1 year ago
common	Fix outdated comment of scram_build_secret()	1 year ago
fe_utils	Fix incorrect source filename references	1 year ago
include	Fix race condition in TupleDescCompactAttr assert code	1 year ago
interfaces	libpq: Add service name to PGconn and PQservice()	1 year ago
makefiles	Use __attribute__((target(...))) for AVX-512 support.	1 year ago
pl	Remove useless casts to (void *)	1 year ago
port	Fix elog(FATAL) before PostmasterMain() or just after fork().	1 year ago
template	thread-safety: gmtime_r(), localtime_r()	1 year ago
test	Remove pg_attribute.attcacheoff column	1 year ago
timezone	Update time zone data files to tzdata release 2024b.	1 year ago
tools	Introduce CompactAttribute array in TupleDesc, take 2	1 year ago
tutorial	Update copyright for 2024	2 years ago
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nls-global.mk	Remove distprep	2 years ago