[−][src]Function nix::sys::mman::mprotect
pub unsafe fn mprotect(
addr: *mut c_void,
length: size_t,
prot: ProtFlags
) -> Result<()>
Set protection of memory mapping.
See mprotect(3)
for
details.
Safety
Calls to mprotect
are inherently unsafe, as changes to memory protections can lead to
SIGSEGVs.
const ONE_K: size_t = 1024; let mut slice: &mut [u8] = unsafe { let mem = mmap(ptr::null_mut(), ONE_K, ProtFlags::PROT_NONE, MapFlags::MAP_ANON | MapFlags::MAP_PRIVATE, -1, 0).unwrap(); mprotect(mem, ONE_K, ProtFlags::PROT_READ | ProtFlags::PROT_WRITE).unwrap(); std::slice::from_raw_parts_mut(mem as *mut u8, ONE_K) }; assert_eq!(slice[0], 0x00); slice[0] = 0xFF; assert_eq!(slice[0], 0xFF);