Function nix::sys::mman::mremap

pub unsafe fn mremap(
    addr: *mut c_void, 
    old_size: size_t, 
    new_size: size_t, 
    flags: MRemapFlags, 
    new_address: Option<*mut c_void>
) -> Result<*mut c_void>

Expands (or shrinks) an existing memory mapping, potentially moving it at the same time.

Safety

See the mremap(2) man page for detailed requirements.