CVS commit: src/lib/libbsdmalloc

["Taylor R Campbell" <riastradh%netbsd.org@localhost>]

Module Name:    src
Committed By:   riastradh
Date:           Tue Jul  4 15:08:55 UTC 2023

Modified Files:
        src/lib/libbsdmalloc: Makefile malloc.c

Log Message:
libbsdmalloc: Provide all allocator front ends and fork hooks.

Front ends:

- aligned_alloc
- calloc
- posix_memalign

Fork hooks:

- _malloc_prefork
- _malloc_postfork
- _malloc_postfork_child

Otherwise these will pull in the jemalloc definitions from libc,
which (a) defeats the purpose, and (b) won't work correctly with
fork and threads.

Thanks to kre@ and the thread on tech-userlevel for pointing me in
the right direction to making this actually work to override
jemalloc:

https://mail-index.netbsd.org/tech-userlevel/2023/06/30/msg013957.html

Note: libbsdmalloc doesn't set errno=ENOMEM on malloc failure, but
these front ends do (even aligned_alloc, which is from C11, which
doesn't define ENOMEM at all, but this pacifies our aligned_alloc
tests in t_posix_memalign.c).  Might want to fix that.

XXX pullup-10


To generate a diff of this commit:
cvs rdiff -u -r1.4 -r1.5 src/lib/libbsdmalloc/Makefile
cvs rdiff -u -r1.2 -r1.3 src/lib/libbsdmalloc/malloc.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.