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From "Cheng, BuQi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HARMONY-5714) [drlvm] Remove extra synchronization runtime helpers.
Date Wed, 12 Nov 2008 07:49:44 GMT

    [ https://issues.apache.org/jira/browse/HARMONY-5714?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12646824#action_12646824
] 

Cheng, BuQi commented on HARMONY-5714:
--------------------------------------

JIT generates a "chknull" instruction before monitor_entry/monitor_exit. The problem is that
in exception handling code generation (in HIR2LIR), the "chknull" instruction is eliminated.
So the problem comes from JIT. 

Thanks!

Buqi

> [drlvm] Remove extra synchronization runtime helpers.
> -----------------------------------------------------
>
>                 Key: HARMONY-5714
>                 URL: https://issues.apache.org/jira/browse/HARMONY-5714
>             Project: Harmony
>          Issue Type: Improvement
>          Components: DRLVM
>            Reporter: Pavel Afremov
>            Assignee: Chunrong Lai
>         Attachments: extra_strong_assert_fix.patch, extra_strong_assert_fix.patch, remove_extra_monitors_helper_1.patch,
remove_extra_monitors_helper_2.patch, remove_extra_monitors_helper_3.patch
>
>
> Remove extra synchronization runtime helpers.
> All list of synchronization runtime helpers:
> •	VM_RT_MONITOR_ENTER_NON_NULL
> •	VM_RT_MONITOR_EXIT_NON_NULL
> •	VM_RT_MONITOR_ENTER_STATIC
> •	VM_RT_MONITOR_EXIT_STATIC
> •	VM_RT_MONITOR_ENTER
> •	VM_RT_MONITOR_EXIT
>  can be replace by two helpers only:
> •	VM_RT_MONITOR_ENTER
> •	VM_RT_MONITOR_EXIT
> It reduces quantity of synchronization helpers in 3 times.

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