hg: jdk7/hotspot-gc/hotspot: 6953058: G1: A bigapp crashes with SIGSEGV in compiled code

[john.cuthbertson at sun.com]

Changeset: 2458a1f25356
Author:    johnc
Date:      2010-06-07 17:46 -0700
URL:       http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/2458a1f25356

6953058: G1: A bigapp crashes with SIGSEGV in compiled code
Summary: In C2's G1 post write barrier, the loads of the buffer and index fields from the DirtyCardQueue structure may be moved across a safepoint. Use the current value of "control" in the C2 IR to limit how far these loads can move.
Reviewed-by: never, iveresov, kvn

! src/share/vm/opto/graphKit.cpp