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From "Xiao-Feng Li" <xiaofeng...@gmail.com>
Subject Re: [drlvm] vm-jit interface. 1 more method for supension points
Date Tue, 15 May 2007 12:48:44 GMT
George, is it possible to reuse the same function and let it to return
different flags for the purpose, such as NEVER_INTERRUPTIBLE,
SOMETIMES_INTERRUPTIBLE, ALWAYS_INTERRUPTIBLE?

Thanks,
xiaofeng

On 5/15/07, George Timoshenko <george.timoshenko@gmail.com> wrote:
> Some time ago 'vm_helper_is_gc_interruptible' method appeared in the
> interface. It is used in JIT to identify if a helper call can be
> interrupted by gc for enumeration. And if a helper is interruptible in
> some circumstances and is not interruptible in other cases the methods
> returns TRUE, as GC-support in JIT must be ready to provide data for gc.
> (for example there are monitor enter/exit helpers with such behavior)
>
> Another JIT functionality (BBPolling) needs to know if a helper call can
> be interrupted for sure. So that method (vm_helper_is_gc_interruptible)
> can not be used as is.
>
> My suggestion is to extend VM-JIT interface with one more method
> 'vm_helper_is_interruptible' that returns true if a helper can be
> interrupted for sure.
>
> Possible implementation is attached to HARMONY-2057
> (https://issues.apache.org/jira/browse/HARMONY-2057)
>
> What do you think about it?
>
>


-- 
http://xiao-feng.blogspot.com

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