Question

int arr[ 5 ] = { 0 };

int i = 8; // out of bounds

arr[ i ] = 8;

I know that I can just check i like this if( i < 0 || i > 5 ) ….

I also know about SEH in Visual Studio, but it looks like not working solution.

__try { /* code */ } 

__except(GetExceptionCode() == EXCEPTION_ARRAY_BOUNDS_EXCEEDED)

This is not working. As I see SEH working in situations like divide to 0, access protected pages … How can I protect my program from crashes?

Answer 1

There is no guarantee that SEH will catch this – it depends on your hardware detecting the access , which does not happen for all invalid array accesses. If you want to be sure of catching it, use the standard C++ std::vector container instead of an array, and access it via its at() member function, rather than the [] operator – this will raise a standard C++ exception if the access is invalid.