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From "Rana Dasgupta" <rdasg...@gmail.com>
Subject Re: [drlvm] vm-jit interface. 1 more method for supension points
Date Wed, 16 May 2007 05:12:08 GMT
On 5/15/07, George Timoshenko <george.timoshenko@gmail.com> wrote:
> Xiao-Feng Li wrote:
> > 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?
>
> Yes. This is also suitable for me.
> In this case VM-JIT interface will be extended with one more enum
> structure instead of additional method.
>

Yep. Adding the enum to the interface is not very different from
adding another method, but I'm OK with either way.
>
> >
> > 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?
> >>
> >>
> >
> >
>
>

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