Code review request for 6998871 "Support making the Throwable.stackTrace field immutable"

[Joe Darcy]

Hello.

Returning to some earlier work, I've developed a proposed fix for

    6998871 "Support making the Throwable.stackTrace field immutable"
    http://cr.openjdk.java.net/~darcy/6998871.2/

One constructor of Throwable now takes an additional boolean argument to 
make the stack trace information immutable.  Analogous constructors are 
added to Exception, RuntimeException, and Error.

Mandy and David have already reviewed the change; I'm interested in 
getting additional feedback on the design of the API.

Cheers,

-Joe