RFR [9] 8056152 API to create Threads that do not inherit InheritableThreadLocals

[Chris Hegarty]

I received some comments from Paul offline about the test. 

Updated webrev:
  http://cr.openjdk.java.net/~chegar/8056152/01/webrev/

-Chris.

On 8 Dec 2015, at 14:15, Chris Hegarty <chris.hegarty at oracle.com> wrote:

> Many threads created by the platform are short lived and perform some
> simple async operation on behalf of the platform. These threads typically
> use/extend sun.misc.ManagedLocalsThread. This is a convenient internal
> API that can be used to create threads that do not wish to inherit initial
> values from inheritable thread-local variables.
> 
> I'd like to propose an additional java.lang.Thread constructor that exposes
> the ability to explicitly "opt out" of inheriting these initial values ( from
> inheritable thread-local variables ). This seems like useful general
> functionality, given the amount of usage in the JDK of the internal API.
> 
> This new public API can then be used to replace usages of the internal
> sun.misc.ManagedLocalsThread. As part of this bug I've only retrofitted
> the usage in the sources of the base module. Other modules can be done
> as a follow up.
> 
> Webrev:
>  http://cr.openjdk.java.net/~chegar/8056152/00/webrev/
> 
> -Chris.
> 
> [1] https://bugs.openjdk.java.net/browse/JDK-8056152