RFR: 8247281: migrate ObjectMonitor::_object to OopStorage [v2]

[Daniel D.Daugherty]

On Fri, 11 Sep 2020 21:31:05 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> Erik's part3 patch ensures that when the ObjectMonitor is allocated,
>> the weak handle is created and initialized to the oop at that point. Since
>> this is still the TSM version, the ObjectMonitor may not yet have a weak
>> handle allocated at the time that object() is called.
>
> Ok, this is cool then and good that this logic is here instead of inside the WeakHandle::resolve/peek functions.  The
> OopHandle similar functions have a null check, so if this was permanent, I'd suggest putting it there.  Since this is
> going to change, having it here and keeping the non-null invariants for WeakHandle::resolve/peek functions is better.

Thanks for confirmation.

-------------

PR: https://git.openjdk.java.net/jdk/pull/135