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XLogFileNameP() is a wrapper routine able to build a palloc'd string for a WAL segment name, which is used for error string generation. There were several code paths where it gets called in a critical section, where memory allocation is not allowed. This results in triggering an assertion failure instead of generating the wanted error message. Another, more annoying, problem is that if the allocation to generate the WAL segment name fails on OOM, then the failure would be escalated to a PANIC. This removes the routine and all its callers are replaced with a logic using a fixed-size buffer. This way, all the existing mistakes are fixed and future ones are prevented. Author: Masahiko Sawada Reviewed-by: Michael Paquier, Álvaro Herrera Discussion: https://postgr.es/m/CA+fd4k5gC9H4uoWMLg9K_QfNrnkkdEw+-AFveob9YX7z8JnKTA@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. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.