Function GC_exclude_static_roots 

pub unsafe extern "C" fn GC_exclude_static_roots(
    arg1: *mut c_void,
    arg2: *mut c_void,
)

Inform the collector that a certain section of statically allocated memory contains no pointers to garbage-collected memory. Thus it does not need to be scanned. This is sometimes important if the application maps large read/write files into the address space, which could be mistaken for dynamic library data segments on some systems. Both section start (low_address) and end (high_address_plus_1) are not needed to be pointer-aligned.