tree cafbf3a2863945fb585e27f4ba8550d5ee797ffd
parent d29cce91d03aef747b5ee1766f0c3808aaa2e34a
author Gilles Peskine <Gilles.Peskine@arm.com> 1698961472 +0100
committer Gilles Peskine <Gilles.Peskine@arm.com> 1701282123 +0100

Fix memory poisoning with Asan on arbitrary byte boundaries

Asan poisons memory with an 8-byte granularity. We want to make sure that
the whole specified region is poisoned (our typical use case is a
heap-allocated object, and we want to poison the whole object, and we don't
care about the bytes after the end of the object and up to the beginning of
the next object). So align the start and end of the region to (un)poison to
an 8-byte boundary.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>