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From "Alex Astapchuk (JIRA)" <j...@apache.org>
Subject [jira] Created: (HARMONY-1806) [drlvm][.jet] wb4j - write barriers for Java-based GC
Date Tue, 10 Oct 2006 10:41:19 GMT
[drlvm][.jet] wb4j - write barriers for Java-based GC

                 Key: HARMONY-1806
                 URL: http://issues.apache.org/jira/browse/HARMONY-1806
             Project: Harmony
          Issue Type: New Feature
          Components: DRLVM
            Reporter: Alex Astapchuk

Attached is implementation of write barriers in Jitrino.JET for Java-based GC (WB4J).

The WB4J is off by default.

Current implementation calls org.mmtk.vm.Barriers::performWriteInBarrier() method.
Attached Barriers.class is the fake implementation of the method. 

Please make sure the class is accessible via the *boot*classpath.

Presuming the Barriers.class is in ./org/mmtk/vm/ and you're using .jet-only mode,
the following command line turns WB4J on:

java -Xbootclasspath/p:. -Xem:jet -Djit.JET.arg.wb4j=true Hello

This patch depends on HARMONY-1785.

When both wb4c and wb4j requested, then WB4J has a higher priority.

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