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List: openjdk-hotspot-runtime-dev
Subject: Please review (S) 6760773: UseCompressedOops is broken with UseParNewGC
From: Coleen.Phillimore () Sun ! COM (Coleen Phillimore - Sun Microsystems)
Date: 2008-11-05 22:04:46
Message-ID: 4912187E.2090509 () sun ! com
[Download RAW message or body]
The load was sign extending the compressed oop when running with very
large Java heap, so that the compare with super class list for casting
was failing. This causes ClassCastException with specjvm98.
UseParNewGC was coincidental - just caues the oop to have sign bit set
that we're looking for.
Webrev: http://webrev.invokedynamic.info/coleenp/6760773
(internal) bug id: http://monaco.sfbay.sun.com/detail.jsf?cr=6760773
Thanks,
Coleen
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