Horton

Make EXEC_BACKEND more convenient on macOS.

Thomas Munro <tmunro@postgresql.org>

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Commit: 88cbbbfa3e2b0d38d6047af83764f140face5991
Author: Thomas Munro <tmunro@postgresql.org>
Date: 2021-08-12T23:09:00Z
Releases: 15.0 
Make EXEC_BACKEND more convenient on macOS.

It's hard to disable ASLR on current macOS releases, for testing with
-DEXEC_BACKEND.  You could already set the environment variable
PG_SHMEM_ADDR to something not likely to collide with mappings created
earlier in process startup.  Let's also provide a default value that
works on current releases and architectures, for developer convenience.

As noted in the pre-existing comment, this is a horrible hack, but
-DEXEC_BACKEND is only used by Unix-based PostgreSQL developers for
testing some otherwise Windows-only code paths, so it seems excusable.

Back-patch to all supported branches.

Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/20210806032944.m4tz7j2w47mant26%40alap3.anarazel.de

Files

PathChange+/−
src/backend/port/sysv_shmem.c modified +10 −0

Discussion