Module fixup 

Pointer fixup after relocation.

After objects are relocated and the forwarding table is populated, we must update all pointers (in live objects and root set) to point to the new locations.

Functions

fixup_nanboxed_bits

Fix up a NaN-boxed u64 value in-place if it contains a forwarded heap pointer.

fixup_ptr

Fix up a single raw pointer if it has a forwarding entry.

fixup_region

Fix up pointers within all live objects in a region.

fixup_roots

Fix up all pointers in the root set using the forwarding table.