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Robert Haas ec7ffb8096 amcheck: fix multiple problems with TOAST pointer validation ... First, don't perform database access while holding a buffer lock. When checking a heap, we can validate that TOAST pointers are sane by performing a scan on the TOAST index and looking up the chunks that correspond to each value ID that appears in a TOAST poiner in the main table. But, to do that while holding a buffer lock at least risks causing other backends to wait uninterruptibly, and probably can cause undetected and uninterruptible deadlocks. So, instead, make a list of checks to perform while holding the lock, and then perform the checks after releasing it. Second, adjust things so that we don't try to follow TOAST pointers for tuples that are already eligible to be pruned. The TOAST tuples become eligible for pruning at the same time that the main tuple does, so trying to check them may lead to spurious reports of corruption, as observed in the buildfarm. The necessary infrastructure to decide whether or not the tuple being checked is prunable was added by commit 3b6c1259f9, but it wasn't actually used for its intended purpose prior to this patch. Mark Dilger, adjusted by me to avoid a memory leak. Discussion: http://postgr.es/m/AC5479E4-6321-473D-AC92-5EC36299FBC2@enterprisedb.com		5 years ago
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backend	Move pg_stat_statements query jumbling to core.	5 years ago
bin	Fix use of cursor sensitivity terminology	5 years ago
common	Refactor HMAC implementations	5 years ago
fe_utils	psql: call clearerr() just before printing	5 years ago
include	Move pg_stat_statements query jumbling to core.	5 years ago
interfaces	libpq: Set Server Name Indication (SNI) for SSL connections	5 years ago
makefiles	Remove libpq.rc, use win32ver.rc for libpq	6 years ago
pl	Remove extra increment of plpgsql's statement counter for FOR loops.	5 years ago
port	Move bsearch_arg to src/port	5 years ago
template	Further tweaking of PG_SYSROOT heuristics for macOS.	5 years ago
test	Remove channel binding requirement from clientcert=verify-full test.	5 years ago
timezone	Update time zone data files to tzdata release 2021a.	5 years ago
tools	amcheck: fix multiple problems with TOAST pointer validation	5 years ago
tutorial	tutorial: land height is "elevation", not "altitude"	5 years ago
.gitignore	…
DEVELOPERS	…
Makefile	Remove the option to build thread_test.c outside configure.	5 years ago
Makefile.global.in	Introduce --with-ssl={openssl} as a configure option	5 years ago
Makefile.shlib	Add PostgreSQL home page to --help output	6 years ago
nls-global.mk	Add errhint_plural() function and make use of it	5 years ago