Unreviewed, rolling back in part1 of r118646.
This patch includes everything necessary for lazy finalization, but
keeps eager finalization enabled for the time being.
Weak pointer finalization should be lazy
https://bugs.webkit.org/show_bug.cgi?id=87599
Reviewed by Sam Weinig.
- heap/MarkedBlock.cpp:
- heap/MarkedBlock.h:
(JSC::MarkedBlock::resetAllocator):
(JSC::MarkedSpace::resetAllocators):
(JSC::MarkedSpace::resetAllocators): Don't force allocator reset anymore.
It will happen automatically when a weak set is swept. It's simpler to
have only one canonical way for this to happen, and it wasn't buying
us anything to do it eagerly.
(JSC::WeakBlock::sweep): Don't short-circuit a sweep unless we know
the sweep would be a no-op. If even one finalizer is pending, we need to
run it, since we won't get another chance.
(JSC::WeakSet::sweep): This loop can be simpler now that
WeakBlock::sweep() does what we mean.
Reset our allocator after a sweep because this is the optimal time to
start trying to recycle old weak pointers.
(JSC::WeakSet::tryFindAllocator): Don't sweep when searching for an
allocator because we've swept already, and forcing a new sweep would be
wasteful.
(JSC::WeakSet::shrink): Be sure to reset our allocator after a shrink
because the shrink may have removed the block the allocator was going to
allocate out of.
