On 09/09/2015 02:55 PM, David M. Lloyd wrote: > On 09/09/2015 08:17 AM, Andrew Haley wrote: >> On 09/09/2015 02:13 PM, David M. Lloyd wrote: >>> How would you hook into the safepoint to perform the unmapping? You'd >>> have to wait for all threads to arrive at safepoints, wouldn't you? >> >> Yes. That happens in the VM already, e.g. when we need to revoke the >> bias of a lock. It's a well-established mechanism. > > Could you extend the technique to other native resources as well?
Yes, but of course there will be some back-pressure from HotSpot developers: it requires changes to the VM, and you have to be extremely careful not to cause a deadlock. Andrew.
