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a guest Jan 22nd, 2019 58 Never
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  1. for offset in (0..64 * 1024 * 1024).step_by(8) { }  == for i in range( 0, 64*1024*1024, 8):
  2.  
  3. Reading Raw Bytes:  let strr = unsafe{ std::slice::from_raw_parts(straddr as *const u8, 0x10)  } ;
  4.                     let redone = String::from_utf8_lossy(&strr);
  5.                    
  6. What a string looks like in memory:
  7. ```
  8.     /// waht a string actuallly looks like:
  9.             $2 = alloc::string::String {
  10.               vec: alloc::vec::Vec<u8> {
  11.                 buf: alloc::raw_vec::RawVec<u8, alloc::alloc::Global> {
  12.                   ptr: core::ptr::Unique<u8> {
  13.                     pointer: 0x5555555acde0 "29\n\000",
  14.                     _marker: core::marker::PhantomData<u8>
  15.                   },
  16.                   cap: 0x3,
  17.                   a: alloc::alloc::Global
  18.                 },
  19.                 len: 0x3
  20.               }
  21.             }
  22.     */
  23. ```
  24.  
  25. ```
  26.         //std::slice::from_raw_parts(0x1337 as *const u8, 0x20 )
  27.         /*
  28.             // as long as we never deref the var it never crashes...
  29.             $1 = &[u8] {
  30.               data_ptr: 0x1337 <error: Cannot access memory at address 0x1337>,
  31.               length: 0x20
  32.             }
  33.         */
  34. ```
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