[scudo] Add GWP-ASan state/metadata pointer proxies.

Provide accessor proxies for the gwp-asan regions that are useful in
symbolizing dumps offline. Should be useful for Fuchsia to be able to
locate these internal pointers to stash the data in a minidump.

Reviewed By: cryptoad

Differential Revision: https://reviews.llvm.org/D107909

GitOrigin-RevId: 32adf108c8edd989caf9392131a5ebaf9de762f2
1 file changed