Allowing overriding the default ASAN shadow mapping offset with the` -asan-shadow-offset` option, and allow zero to be specified for both offset and scale. This is useful for bootstrapping or stand-alone ASAN implementations.
This was removed back in r202033 by Kostya.
It's mostly only useful when starting to port ASan, AFAICT.
I'm curious, what do you mean with "stand-alone ASAN implementations"?
Not sure if I can re-open the revision. We got a failure on one of the PS4 buildbots:
opt: for the -asan-mapping-offset option: Cannot find option named '0xdeadbeef'! FileCheck error: '-' is empty.