2 ms·

If I read it correctly, your implementation might read beyond the end of the buffer, and if it crosses a page boundary into an unmapped page, it will segfault.

If I read it correctly, your implementation might read beyond the end of the buffer, and if it crosses a page boundary into an unmapped page, it will segfault. That's one of the many evils of null terminated strings.

orlp 3y ago
If we go by the absolute strictest interpretation of the C standard, yes, the above is UB. But in practice no one has page boundaries that cross word boundaries, and I align to a word boundary before doing the word-by-word loop.
- gpderetta 3y ago
  good point of course!