RFR: 8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe (original) (raw)

Christian Thalinger christian.thalinger at oracle.com
Wed Apr 22 18:28:54 UTC 2015


On Apr 22, 2015, at 11:16 AM, Vitaly Davidovich <vitalyd at gmail.com> wrote:

stray '', I meant On Wed, Apr 22, 2015 at 2:16 PM, Vitaly Davidovich <vitalyd at gmail.com> wrote:

Chris, I think you have a stray '/' here:

_185 if (UseCompressedOops) { _ ?

I do. Thanks for noticing.

On Wed, Apr 22, 2015 at 1:56 PM, Christian Thalinger <_ _christian.thalinger at oracle.com> wrote: https://bugs.openjdk.java.net/browse/JDK-8022853 In some native data structures of the VM oops are stored uncompressed even if compressed oops are turned on, for example Klass::javamirror. Java code which is tightly coupled with the VM should have the ability to read and write such fields. This additional Unsafe API make the implementation of JEP 243: Java-Level JVM Compiler Interface simpler. http://cr.openjdk.java.net/~twisti/8022853/hotspot/webrev.01/ http://cr.openjdk.java.net/~twisti/8022853/jdk/webrev.01/



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