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(parent: db8855b) | patch
Fix integer underflow in shared memory debugging
authorDaniel Gustafsson <dgustafsson@postgresql.org>
Thu, 29 Feb 2024 11:19:52 +0000 (12:19 +0100)
committerDaniel Gustafsson <dgustafsson@postgresql.org>
Thu, 29 Feb 2024 11:19:52 +0000 (12:19 +0100)
commit55ea12a2827791b7fb3f30b207a122a35df951d8
treee69f1c8a139ff51d48e1d26f6ba298bd70e23582tree
parentdb8855b66f5cfd9761b1763fdc6b8d93179607dfcommit | diff
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
src/backend/utils/mmgr/dsa.c diff | blob | blame | history
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