[rfc][ARM] Support for safepoint check based on memory protect rather than polling

[Andrew Haley]

On 05/15/2012 06:24 PM, Andrew Dinn wrote:
>>>  
>>> >>    if (jinfo->bc_stackinfo[dest_taken] & BC_COMPILED) {
>> > 
>> > I think this is really the wrong test.  We should just be checking
>> > dest < bci.
> Hmm, I guess so. Although this convention of checking the bc_stackinfo
> flags is used throughout the compiler.

Yes, it is.  My bad; it's not correct for safepoint checks.

Andrew.