postgresql/src
Tom Lane f727b6ea8f Clean up assorted failures under clang's -fsanitize=undefined checks.
Most of these are cases where we could call memcpy() or other libc
functions with a NULL pointer and a zero count, which is forbidden
by POSIX even though every production version of libc allows it.
We've fixed such things before in a piecemeal way, but apparently
never made an effort to try to get them all.  I don't claim that
this patch does so either, but it gets every failure I observe in
check-world, using clang 12.0.1 on current RHEL8.

numeric.c has a different issue that the sanitizer doesn't like:
"ln(-1.0)" will compute log10(0) and then try to assign the
resulting -Inf to an integer variable.  We don't actually use the
result in such a case, so there's no live bug.

Back-patch to all supported branches, with the idea that we might
start running a buildfarm member that tests this case.  This includes
back-patching c1132aae3 (Check the size in COPY_POINTER_FIELD),
which previously silenced some of these issues in copyfuncs.c.

Discussion: https://postgr.es/m/CALNJ-vT9r0DSsAOw9OXVJFxLENoVS_68kJ5x0p44atoYH+H4dg@mail.gmail.com
2022-03-03 18:13:24 -05:00
..
backend Clean up assorted failures under clang's -fsanitize=undefined checks. 2022-03-03 18:13:24 -05:00
bin pg_waldump: Fix error message for WAL files smaller than XLOG_BLCKSZ. 2022-02-25 10:34:38 -08:00
common Fix buffer overrun in unicode string normalization with empty input 2021-11-11 15:01:57 +09:00
fe_utils Clean up assorted failures under clang's -fsanitize=undefined checks. 2022-03-03 18:13:24 -05:00
include Suppress warning about stack_base_ptr with late-model GCC. 2022-02-17 22:45:34 -05:00
interfaces Allow root-owned SSL private keys in libpq, not only the backend. 2022-03-02 11:57:02 -05:00
makefiles Select CFLAGS_SL at configure time, not in platform-specific Makefiles. 2019-10-21 12:32:35 -04:00
pl Disallow execution of SPI functions during plperl function compilation. 2022-02-25 17:40:45 -05:00
port Stamp 12.10. 2022-02-07 16:19:04 -05:00
template Further tweaking of PG_SYSROOT heuristics for macOS. 2021-01-20 12:07:35 -05:00
test Fix temporary object cleanup failing due to toast access without snapshot. 2022-02-21 08:59:32 -08:00
timezone Update time zone data files to tzdata release 2021e. 2021-10-29 11:38:47 -04:00
tools Allow clean.bat to be run from anywhere 2022-01-20 10:21:02 -05:00
tutorial tutorial: land height is "elevation", not "altitude" 2021-03-10 20:25:18 -05:00
.gitignore Convert cvsignore to gitignore, and add .gitignore for build targets. 2010-09-22 12:57:04 +02:00
DEVELOPERS Replace a couple of references to files that no longer exist in the source 2009-05-04 08:08:47 +00:00
Makefile Fix partial-build problems introduced by having more generated headers. 2018-04-09 16:42:10 -04:00
Makefile.global.in Fix prove_installcheck to use correct paths when used with PGXS 2021-07-01 08:47:04 -04:00
Makefile.shlib Fix pkg-config files for static linking 2021-09-06 09:43:18 +02:00
nls-global.mk NLS: Fix backend gettext triggers 2019-09-23 09:05:50 +02:00