Is there a way to force calling functions to place calls to things that can throw exceptions in try{} block?

Well, almost anything is possible in Perl. You could, after compilation, put all functions in wrappers where the wrapper walks the call stack and searches for a try. If only some functions throw exceptions, you can give those functions an attribute, and use the attribute mechanism to place those functions in wrappers.

This is of course costly, as any function call is replaced with two calls, with doing some work in between as well. You can of course use a switch (command-line argument, environment variable, etc) that recognizes a development or testing environment, and only places wrappers in development and testing environments. This requires your test set to cover all function calls (this is different from having all functions called!).

Abigail