Horton

Fix integer underflow in shared memory debugging

Daniel Gustafsson <dgustafsson@postgresql.org>

View on postgr.es
Commit: 6fd144e3a9664ea545d10008c48dceb6c4e9d38a
Author: Daniel Gustafsson <dgustafsson@postgresql.org>
Date: 2024-02-29T11:19:52Z
Releases: 17.0 
Fix integer underflow in shared memory debugging

dsa_dump would print a large negative number instead of zero for
segment bin 0.  Fix by explicitly checking for underflow and add
special case for bin 0. Backpatch to all supported versions.

Author: Ian Ilyasov <ianilyasov@outlook.com>
Reviewed-by: Robert Haas <robertmhaas@gmail.com>
Discussion: https://postgr.es/m/GV1P251MB1004E0D09D117D3CECF9256ECD502@GV1P251MB1004.EURP251.PROD.OUTLOOK.COM
Backpatch-through: v12

Files

PathChange+/−
src/backend/utils/mmgr/dsa.c modified +7 −3

Discussion