RFR 8214442: Improve stack walk API by adding handle marks

[Mandy Chung]

Looks good.  Thanks for fixing it.

Mandy

On 1/8/19 6:17 AM, Harold David Seigel wrote:
> Hi,
>
> Please review this small JDK-13 change to add handle marks to the 
> stack walk API for reasons described in the bug.
>
> Open Webrev: 
> http://cr.openjdk.java.net/~hseigel/bug_8214442/webrev/index.html
>
> JBS Bug:  https://bugs.openjdk.java.net/browse/JDK-8214442
>
> The fix was regression tested by running Mach5 tiers 1 and 2 tests and 
> builds on Linux-x64, Windows, and Mac OS X, Mach5 tiers 3 -5 o 
> Linux-x64, and by running JCK-12 Lang and VM tests on Linux-x64.
>
> Thanks, Harold
>