RFR (S): 8191888: Refactor ClassLoaderData::remove_handle to use the Access API
erik.osterlund at oracle.com
Mon Nov 27 09:06:59 UTC 2017
The ClassLoaderData::remove_handle() member function currently uses
explicit G1 SATB barriers to remove an oop from the root set, as these
handles are not necessarily walked by the GC in a safepoint. Therefore
G1 needs pre-write barriers.
This should now be modeled as a
RootAccess<IN_CONCURRENT_ROOT>::oop_store instead. This maps to
performing a pre-write SATB barrier with G1, but other GCs are free to
do other things as necessary.
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