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From "Alex Astapchuk (JIRA)" <j...@apache.org>
Subject [jira] Created: (HARMONY-816) Initial WBs for Java in Jitrino.JET
Date Mon, 10 Jul 2006 12:32:29 GMT
Initial WBs for Java in Jitrino.JET 

         Key: HARMONY-816
         URL: http://issues.apache.org/jira/browse/HARMONY-816
     Project: Harmony
        Type: New Feature

  Components: Contributions  
 Environment: DRLVM+Jitrino
    Reporter: Alex Astapchuk

Initial implementation of write barriers for MMTk in Jitrino.JET,
including support for magics.

To use the implementation:
1. copy wb4j_jet.diff into vm/ and apply 'patch -p0 < wb4j_jet.diff'
2. copy magics.cpp into vm/jitrino/src/jet
3. compile attached test.java and PlanLocal.java (note: you need 
org/vmmagic/unboxed or its stubs available)

By default, the WB code generation is off, to turn it on start VM as
ij -Xem jet: -Xjit jet::wb4j test

Currently, you will see no visible effect, you can only test it in debugger.

Note: current implementation only inserts WBs into a method named testWB of class test.

This is done intentionally to avoid breaking normal execution of bootstrap.
If you want to change this behavior, then please edit vm/jitrino/src/jet/compiler.cpp
(look for string test::testWB).

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