RFR: 8003471 - Add Add instrumentation facilities for Throwables

[Nils Loodin]

Hello all!

Please review this change that would add facilities to help 
instrumentation of Throwables, to get a rough count of how many 
Exceptions and Errors an application has thrown during its lifetime.

This can help developers and people working in customer-related support 
roles to do a high level assessment of a program to see if it has any 
undesirable patterns for instance.

The instrumentation point will Receive the Throwable thrown, from which 
information about message and stack trace and throwable type can be 
extracted.

Webrev: http://cr.openjdk.java.net/~nloodin/exception-tracing/webrev.01/
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=8003322

Cheers,
Nils Loodin