https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119926
Bug ID: 119926
Summary: Allow -fasan-shadow-offset= to be used with
-fsanitize=address
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: yshuiv7 at gmail dot com
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org
Target Milestone: ---
Right now gcc limits -fasan-shadow-offset= to -fsanitize=kernel-address (with
clang, I can already use `-mllvm -asan-mapping-offset=` with normal asan). But
setting the shadow offset can be useful for user space programs as well. For
example, wine supports running 32-bit and 64-bit code in the same process, by
changing the shadow offset we can have a single unified shadow rather than
duplicating the shadow at two different offsets.
Related question: what are the differences between -fsanitize=kernel-address
and =address? Is there anything that would stop me from using kernel-address on
user space programs?
