Exceeding array bound in C — Why does this NOT crash?

by

C compilers generally do not generate code to check array bounds, for the sake of efficiency. Out-of-bounds array accesses result in “undefined behavior”, and one
possible outcome is that “it works”. It’s not guaranteed to cause a crash or other
diagnostic, but if you’re on an operating system with virtual memory support, and your array index points to a virtual memory location that hasn’t yet been mapped to physical memory, your program is more likely to crash.

More Related Contents:

  1. Is it possible to use notation [] with pointers in C?
  2. C array pointer increment
  3. I need help understanding this code in C [closed]
  4. C | Static array: why does writing out-of-bounds not result in exception? [duplicate]
  5. C-programming board game [duplicate]
  6. Is an array name a pointer?
  7. Returning an array using C
  8. Getting a stack overflow exception when declaring a large array
  9. How do I work with dynamic multi-dimensional arrays in C?
  10. Using malloc for allocation of multi-dimensional arrays with different row lengths
  11. Exceptions to array decaying into a pointer?
  12. Why do arrays in C decay to pointers?
  13. What is the maximum size of an array in C?
  14. How does GCC implement variable-length arrays?
  15. Pointer address in a C multidimensional array
  16. No compiler error when fixed size char array is initialized without enough room for null terminator
  17. Performance of 2-dimensional array vs 1-dimensional array
  18. Malloc a 3-Dimensional array in C?
  19. initializing an array of ints
  20. Need help using qsort with an array of structs
  21. Changing array inside function in C
  22. Miscalculation of array size inside a function
  23. Are a, &a, *a, a[0], &a[0] and &a[0][0] identical pointers?
  24. C char array initialization: what happens if there are less characters in the string literal than the array size?
  25. Resizing an array with C
  26. What’s the difference between array and &array?
  27. Reliably determine the number of elements in an array
  28. C Function to Convert float to byte array
  29. C split a char array into different variables
  30. Convert char array to string use C

Leave a Comment