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From "Eugene S. Ostrovsky (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HARMONY-1527) [DRLVM] JVMTI watched fields callbacks is called from jit with direct pointers arguments.
Date Thu, 21 Sep 2006 13:11:24 GMT
     [ http://issues.apache.org/jira/browse/HARMONY-1527?page=all ]

Eugene S. Ostrovsky updated HARMONY-1527:
-----------------------------------------

    Attachment: JVMTI-watched-fields-callbacks-is-called-from-jit-with-direct-pointers-arguments.patch

> [DRLVM] JVMTI watched fields callbacks is called from jit with direct pointers arguments.
> -----------------------------------------------------------------------------------------
>
>                 Key: HARMONY-1527
>                 URL: http://issues.apache.org/jira/browse/HARMONY-1527
>             Project: Harmony
>          Issue Type: Improvement
>          Components: DRLVM
>            Reporter: Eugene S. Ostrovsky
>         Attachments: JVMTI-watched-fields-callbacks-is-called-from-jit-with-direct-pointers-arguments.patch
>
>
> By declaration jvmti_field_access_callback() & jvmti_field_modification_callback()
must recieve pointer to jobject (GC-safe object handle). But actually JIT transfers non GC-safe
direct pointers to managed objects. This results in crash on any attempt to use recieved object.
> Also JIT passes direct pointer instead of gc-safe handle in jvalue.l field of new_value
argument to jvmti_field_modification_callback().
> Proposed patch fixes callbacks interface and implementation according to actual data
type passed from JIT.

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