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From "Alexey Varlamov (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HARMONY-3784) [drlvm][jit][jet] Incorrect support of vmmagic types and object fields in JET compiler
Date Tue, 08 May 2007 12:45:15 GMT

     [ https://issues.apache.org/jira/browse/HARMONY-3784?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Alexey Varlamov resolved HARMONY-3784.
--------------------------------------

    Resolution: Fixed

Applied at r536179, thanks!
Did a minor fix in cg_fld_arr.cpp:
-    if (!get && compilation_params.exe_notify_field_modification && fieldIsMagic)
 {
+   if (!get && compilation_params.exe_notify_field_modification && !fieldIsMagic)
 {

Probably we need to discuss on dev-list whether we need to notify about accesses to magic
fields or not...

> [drlvm][jit][jet] Incorrect support of vmmagic types and object fields in JET compiler
> --------------------------------------------------------------------------------------
>
>                 Key: HARMONY-3784
>                 URL: https://issues.apache.org/jira/browse/HARMONY-3784
>             Project: Harmony
>          Issue Type: Bug
>          Components: DRLVM
>            Reporter: Mikhail Fursov
>         Assigned To: Alexey Varlamov
>         Attachments: jet.magics
>
>
> VMMagic implementation in JET compiler was initially prototyped but was never actually
used/tested except several particular places in class initializers (DRLVM server mode uses
JET compiler for <clinits>)
> JET has several problems with magic implementation today:
> 1) Magic types are reported to GC. So if GC happend during class initialization DRLVM
will fail
> 2) Magic types are incorrectly stored to fields on EM64T platform with compressed references
mode enabled.
> The only scenario affected today is GCv5 server mode support for EM64T platform where
field of Address type is used.

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