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  1. use std::mem;
  2.  
  3. fn main() {
  4.     const N: usize = 32;
  5.  
  6.     let mut addrs = Vec::new();
  7.  
  8.     for _ in 0..20 {
  9.         // Prevent optimization by taking raw pointers and using volatile reads
  10.         let arr: [u8; N] = [0; N];
  11.         let ptr = &arr as *const _ as usize;
  12.         unsafe { std::ptr::read_volatile(&ptr); }
  13.  
  14.         addrs.push(ptr);
  15.     }
  16.  
  17.     for (i, addr) in addrs.iter().enumerate() {
  18.         println!(
  19.             "{:2}: {:#x}   aligned_to_usize = {}",
  20.             i,
  21.             addr,
  22.             addr % mem::align_of::<usize>() == 0
  23.         );
  24.     }
  25. }
  26.  
Success #stdin #stdout 0s 5320KB
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stdin
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Standard input is empty
stdout
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 0: 0x7ffd26caadc0   aligned_to_usize = true
 1: 0x7ffd26caadc0   aligned_to_usize = true
 2: 0x7ffd26caadc0   aligned_to_usize = true
 3: 0x7ffd26caadc0   aligned_to_usize = true
 4: 0x7ffd26caadc0   aligned_to_usize = true
 5: 0x7ffd26caadc0   aligned_to_usize = true
 6: 0x7ffd26caadc0   aligned_to_usize = true
 7: 0x7ffd26caadc0   aligned_to_usize = true
 8: 0x7ffd26caadc0   aligned_to_usize = true
 9: 0x7ffd26caadc0   aligned_to_usize = true
10: 0x7ffd26caadc0   aligned_to_usize = true
11: 0x7ffd26caadc0   aligned_to_usize = true
12: 0x7ffd26caadc0   aligned_to_usize = true
13: 0x7ffd26caadc0   aligned_to_usize = true
14: 0x7ffd26caadc0   aligned_to_usize = true
15: 0x7ffd26caadc0   aligned_to_usize = true
16: 0x7ffd26caadc0   aligned_to_usize = true
17: 0x7ffd26caadc0   aligned_to_usize = true
18: 0x7ffd26caadc0   aligned_to_usize = true
19: 0x7ffd26caadc0   aligned_to_usize = true
https://ideone.com/dvgjwN
language:
Rust (rust 1.56)
created:
5 days ago
visibility:
public

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