[foreign] RFR Add sizeof method to Struct type

[Henry Jen]

I am not sure why we need the Util.alignUp call here, that’s supposed to be used for allocation to arrange address space.

The layout should have proper padding and give the right size as if you call sizeof() in C on the struct.

Otherwise, SystemABI.sizeof(Layout) should give you the right size based on platform.

Cheers,
Henry


> On Jul 26, 2018, at 1:50 AM, Sundararajan Athijegannathan <sundararajan.athijegannathan at oracle.com> wrote:
> 
> Please review.
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8208284
> Webrev: http://cr.openjdk.java.net/~sundar/8208284/webrev.00/
> 
> Thanks,
> -Sundar