[LLVMdev] How to handle divide-by-zero exception?

[Mike Stump]

On May 8, 2008, at 7:17 PM, Talin wrote:
> Currently it states in the language manual that the results of  
> division
> by zero are undefined. However, I'm curious as to how you would  
> normally
> handle either divide by zero or other "hardware" exceptions (null
> pointer dereference and so on) and turn them into LLVM exceptions.

See Java and Ada in gcc for an example of how this is done.   
Essentially, you install a trap handler on the OS for the traps your  
interested in and have them create an exception.  The inline code is  
`normal', no special funniness to it, other than exception tables and  
unwind tables that explain what to do.  This scheme can even be made  
to work for asynchronous events as well.