CVS commit: src/usr.bin/make/unit-tests

["Roland Illig" <rillig%netbsd.org@localhost>]

Module Name:    src
Committed By:   rillig
Date:           Sat Feb  5 10:41:15 UTC 2022

Modified Files:
        src/usr.bin/make/unit-tests: var-scope-local.mk

Log Message:
tests/make: document and try to reproduce the crash in Parse_IsVar

Fixed in parse.c 1.662 from today.  To actually crash make, the end of
the expanded dependency line must be at the end of a mapped region.
There is no guaranteed crash, as this depends on the memory allocator.
NetBSD's jemalloc allocates large contiguous regions, making it less
likely for an allocation to end up at the end of a mapped region.  The
memory allocators used by FreeBSD and OpenBSD are better at detecting
such bugs.


To generate a diff of this commit:
cvs rdiff -u -r1.3 -r1.4 src/usr.bin/make/unit-tests/var-scope-local.mk

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