Handling Segfaults

What is the most portable way to catch segfaults together with their addresses and then resuming at the place where it happened? I.e. to handle array out of bounds exception by expanding array.

I know it is done with signal() on POSIX and with SetUnhandledExceptionFilter() on Windows. But you cant define signal() for Windows, because it has its own stripped down version, useful only for the purpose of handling CTRL-C.

Both don't signal() and SetUnhandledExceptionFilter() have no means of recovering from error.

>>8
You will still have to check the index at some stage to prove that I+1 < N. There is just no way to otherwise know that some index coming from user input or from Internet conforms to the type. So now you have two problems: bounds checks and obscure constructs, you think are helping to reduce checks.