[PDF] Exception Handling for C++ - Bjarne Stroustrup

Does C++ support exception handling?

• C++ is designed to coexist with other languages that do not support exception handling. Consequently, we rejected any ideas for exception handling that would have required all functions in a program to be writ- ten in C++. After the presentation of the exception handling scheme we discuss its use compared to ‘traditional’ error handling techniques.

What are C++ exceptions in MSVC?

• C++ exceptions in MSVC are implemented on top of SEH Keywords __try, __except and __finally can be used for compiler-level SEH support The compiler uses a single exception handler per all functions with SEH, but different supporting structures (scope tables) per function The SEH handler registration frame is placed on the stack

What is an exception handler in Java?

• An exception handler is associated with a try-block and is invoked whenever its exception occurs in that block or in any function called directly or indirectly from it. For example, say in the example above that xxiididn’t actually occur in g()but in a function h()called by g():

How does the compiler handle exceptions?

• At the point where an exception is thrown, the compiler might give to the library functions that search for a handler a pointer to a string that names the exception class and all its base classes, along with a pointer to the copy constructor for each.