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Although 58c6feccf fixed the case for SIGQUIT, we were still calling proc_exit() from signal handlers for SIGTERM and timeout failures in ProcessStartupPacket. Fortunately, at the point where that code runs, we haven't yet connected to shared memory in any meaningful way, so there is nothing we need to undo in shared memory. This means it should be safe to use _exit(1) here, ie, not run any atexit handlers but also inform the postmaster that it's not a crash exit. To make sure nobody breaks the "nothing to undo" expectation, add a cross-check that no on-shmem-exit or before-shmem-exit handlers have been registered yet when we finish using these signal handlers. This change is simple enough that maybe it could be back-patched, but I won't risk that right now. Discussion: https://postgr.es/m/1850884.1599601164@sss.pgh.pa.us
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/.