hg: hsx/hotspot-gc/hotspot: 7121623: G1: always be able to reliably calculate the length of a forwarded chunked array

[tony.printezis at oracle.com]

Changeset: 02838862dec8
Author:    tonyp
Date:      2012-01-07 00:43 -0500
URL:       http://hg.openjdk.java.net/hsx/hotspot-gc/hotspot/rev/02838862dec8

7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
Summary: Store the "next chunk start index" in the length field of the to-space object, instead of the from-space object, so that we can always reliably read the size of all from-space objects.
Reviewed-by: johnc, ysr, jmasa

! src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp