RE: exception handler
Robert Craig wrote:
>
> For the global exception handler, I really
> don't want to support the resumption of the program
> from the point where the error occured.
>
> I have numerous optimizations in the Translator,
> and a couple in the interpreter, that would be ruined
> by this. It would mean the normal program control flow
> could be broken at any moment. The Translator
> could not make the very basic assumption that a
> statement will be executed after the preceding statement,
> without the possibility that all kinds of stuff
> will suddenly change due to an exception,
> e.g. global variable values.
> I can handle jumping into a crash routine, but not
> returning to the point of the exception and
> continuing. It would be too unreliable.
>
> Even with all optimizations turned off, I suspect
> the program would have difficulty in most cases
> trying to continue, e.g. if there was an uninitialized
> variable, a subscript out of bounds, etc. In most cases
> it doesn't seem likely that your handler would be able
> to come up with a good variable value that would let your
> program continue safely and productively.
That's fine. Any improvement is welcome.
I suggest you call it "improved crash handling",
rather than "exception handling", however. That would
be more accurate.
Irv
|
Not Categorized, Please Help
|
|
