Alvaro Herrera f0ff52f25c Avoid memcpy() with a NULL source pointer and count == 0 ...

When memcpy() is called on a pointer, the compiler is entitled to assume
that the pointer is not null, which can lead to optimizing nearby code
in potentially undesirable ways.  We still want such optimizations
(gcc's -fdelete-null-pointer-checks) in cases where they're valid.

Related: commit 13bba02271dc.

Backpatch to pg11, where this particular instance appeared.

Reported-by: Ranier Vilela <ranier.vf@gmail.com>
Reported-by: Zhihong Yu <zyu@yugabyte.com>
Discussion: https://postgr.es/m/CAEudQApUndmQkr5fLrCKXQ7+ib44i7S+Kk93pyVThS85PnG3bQ@mail.gmail.com
Discussion: https://postgr.es/m/CALNJ-vSdhwSM5f4tnNn1cdLHvXMVe_S+V3nR5GwNrmCPNB2VtQ@mail.gmail.com

2020-12-01 11:46:56 -03:00

..

backend

Avoid memcpy() with a NULL source pointer and count == 0

2020-12-01 11:46:56 -03:00

bin

Fix recently-introduced breakage in psql's \connect command.

2020-11-29 15:22:04 -05:00

common

Fix command-line colorization on Windows with VT100-compatible environments

2020-03-02 15:46:24 +09:00

fe_utils

Fix parallel restore of FKs to partitioned tables

2019-10-17 09:58:01 +02:00

include

Properly check index mark/restore in ExecSupportsMarkRestore.

2020-11-24 21:17:02 +00:00

interfaces

Stamp 12.5.

2020-11-09 17:26:33 -05:00

makefiles

Select CFLAGS_SL at configure time, not in platform-specific Makefiles.

2019-10-21 12:32:35 -04:00

pl

Translation updates

2020-11-09 12:36:44 +01:00

port

Stamp 12.5.

2020-11-09 17:26:33 -05:00

template

On macOS, use -isysroot in link steps as well as compile steps.

2020-11-20 00:58:26 -05:00

test

Fix miscomputation of direct_lateral_relids for join relations.

2020-11-30 12:22:43 -05:00

timezone

Update time zone data files to tzdata release 2020d.

2020-10-22 21:24:07 -04:00

tools

Sync our copy of the timezone library with IANA release tzcode2020c.

2020-10-16 21:40:16 -04:00

tutorial

Phase 2 pgindent run for v12.

2019-05-22 13:04:48 -04:00

.gitignore

…

DEVELOPERS

…

Makefile

…

Makefile.global.in

Select CFLAGS_SL at configure time, not in platform-specific Makefiles.

2019-10-21 12:32:35 -04:00

Makefile.shlib

Ensure static libraries have correct mod time even if ranlib messes it up.

2018-11-29 15:53:44 -05:00

nls-global.mk

NLS: Fix backend gettext triggers

2019-09-23 09:05:50 +02:00