50eb4e1181
Because long is 32-bit on 64-bit Windows, it isn't a good datatype to store the difference between 2 pointers. The under-sized type could overflow and lead to scary warnings in MEMORY_CONTEXT_CHECKING builds, such as: WARNING: problem in alloc set ExecutorState: bad single-chunk %p in block %p However, the problem lies only in the code running the check, not from an actual memory accounting bug. Fix by using "Size" instead of "long". This means using an unsigned type rather than the previous signed type. If the block's freeptr was corrupted, we'd still catch that if the unsigned type wrapped. Unsigned allows us to avoid further needless complexities around comparing signed and unsigned types. Author: David Rowley <dgrowleyml@gmail.com> Reviewed-by: Michael Paquier <michael@paquier.xyz> Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us> Backpatch-through: 13 Discussion: https://postgr.es/m/CAApHDvo-RmiT4s33J=aC9C_-wPZjOXQ232V-EZFgKftSsNRi4w@mail.gmail.com
PostgreSQL Database Management System
This directory contains the source code distribution of the PostgreSQL database management system.
PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.