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mrustc (master)
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use std::io::{self, Read}; use std::{ptr, sync::atomic}; pub fn zero_memory(s: &mut String) { let default = u8::default(); for c in unsafe { s.as_bytes_mut() } { unsafe { ptr::write_volatile(c, default) }; } atomic::fence(atomic::Ordering::SeqCst); atomic::compiler_fence(atomic::Ordering::SeqCst); } pub fn test_zero() -> String { let mut buffer = String::new(); io::stdin().read_to_string(&mut buffer).unwrap(); zero_memory(&mut buffer); let copy = buffer[1..3].to_owned(); copy }
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