Function test_mremap

tests/mm/mmap.rs:171–189

()

#[cfg(any(target_os = "emscripten", target_os = "linux"))]
#[test]
fn test_mremap() {
    use rustix::mm::{mmap_anonymous, mremap, munmap, MapFlags, MremapFlags, ProtFlags};
    use std::ptr::null_mut;

    unsafe {
        let addr = mmap_anonymous(null_mut(), 8192, ProtFlags::READ, MapFlags::PRIVATE).unwrap();

        assert_eq!(
            mremap(addr, 4096, 16384, MremapFlags::empty()),
            Err(rustix::io::Errno::NOMEM)
        );
        let new = mremap(addr, 4096, 16384, MremapFlags::MAYMOVE).unwrap();
        assert_ne!(new, addr);
        assert!(!new.is_null());

        munmap(new, 16384).unwrap();
        munmap(addr.offset(4096), 4096).unwrap();
    }
}