Traditional exception handlers are procedural.
Procedural exception handling breaks the normal flow of execution and executes a pre-registered exception handler. The details of how this is done depends on whether it is a hardware or software exception and how the software exception is implemented. Some exceptions, especially hardware ones, may be handled so gracefully that execution can resume where it was interrupted. ( Wiki)
Alternative approaches to exception handling in software are error checking, which maintains normal program flow with later explicit checks for contingencies reported using special return values or some auxiliary global
variable such as C's
errno or floating point status flags; or input validation to premptively
filter exceptional cases. (
Wiki).
Some programmers write software with error reporting features that collect details that may be helpful in fixing the problem, and display those details on the screen, or store them to a file such as a core dump, or in some cases an automatic error reporting system such as Windows Error Reporting can automatically phone home and email those details to the programmers ( Wiki).
Updated on 04 Jun 2017.