[jira] Created: (RVM-859) Rework barrier plumbing between MMTk and Jikes RVM

Rework barrier plumbing between MMTk and Jikes RVM
--------------------------------------------------

                 Key: RVM-859
                 URL: http://jira.codehaus.org/browse/RVM-859
             Project: RVM
          Issue Type: Improvement
          Components: MMTk
            Reporter: Steve Blackburn
            Assignee: Steve Blackburn
             Fix For: svn head


The plumbing of read and write barriers between the VM and MMTk has been pretty messy and is limited to object references.

Planed (and completed) actions:

- consistently use Java-specific nomenclature on the VM side (eg "putfield") and language neutral on the MMTk side (eg "fieldWrite")
- move barriers out of MemoryManager into their own class (done)
- ensure nomenclature is clean and consistent across types
- expand interface to include primitive types
- differentiate VM-barriers from GC-barriers (for example, some VM optimization may wish to barrier all array accesses, independent of the GC)

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     [ http://jira.codehaus.org/browse/RVM-859?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steve Blackburn updated RVM-859:
--------------------------------

    Issue Type: Sub-task  (was: Improvement)
        Parent: RVM-845

> Rework barrier plumbing between MMTk and Jikes RVM
> --------------------------------------------------
>
>                 Key: RVM-859
>                 URL: http://jira.codehaus.org/browse/RVM-859
>             Project: RVM
>          Issue Type: Sub-task
>          Components: MMTk
>            Reporter: Steve Blackburn
>            Assignee: Steve Blackburn
>             Fix For: svn head
>
>
> The plumbing of read and write barriers between the VM and MMTk has been pretty messy and is limited to object references.
> Planed (and completed) actions:
> - consistently use Java-specific nomenclature on the VM side (eg "putfield") and language neutral on the MMTk side (eg "fieldWrite")
> - move barriers out of MemoryManager into their own class (done)
> - ensure nomenclature is clean and consistent across types
> - expand interface to include primitive types
> - differentiate VM-barriers from GC-barriers (for example, some VM optimization may wish to barrier all array accesses, independent of the GC)

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     [ http://jira.codehaus.org/browse/RVM-859?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steve Blackburn resolved RVM-859.
---------------------------------

    Resolution: Fixed

I believe this is now complete.

It is covered in the following commits: r15772 and r15780-7.

> Rework barrier plumbing between MMTk and Jikes RVM
> --------------------------------------------------
>
>                 Key: RVM-859
>                 URL: http://jira.codehaus.org/browse/RVM-859
>             Project: RVM
>          Issue Type: Sub-task
>          Components: MMTk
>            Reporter: Steve Blackburn
>            Assignee: Steve Blackburn
>             Fix For: svn head
>
>
> The plumbing of read and write barriers between the VM and MMTk has been pretty messy and is limited to object references.
> Planed (and completed) actions:
> - consistently use Java-specific nomenclature on the VM side (eg "putfield") and language neutral on the MMTk side (eg "fieldWrite")
> - move barriers out of MemoryManager into their own class (done)
> - ensure nomenclature is clean and consistent across types
> - expand interface to include primitive types
> - differentiate VM-barriers from GC-barriers (for example, some VM optimization may wish to barrier all array accesses, independent of the GC)

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