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7143490: G1: Remove HeapRegion::_top_at_conc_mark_count

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Removed the HeapRegion::_top_at_conc_mark_count field. It is no longer needed as a result of the changes for 6888336 and 7127706. Refactored the closures that finalize and verify the liveness counting data so that common functionality was placed into a base class.

Reviewed-by: brutisso, tonyp
This commit is contained in:
John Cuthbertson 2012-04-25 10:23:12 -07:00
parent f5558edf7b
commit 377a04fe57
6 changed files with 64 additions and 192 deletions
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5
hotspot/src/share/vm/gc_implementation/g1/heapRegion.cpp
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@ -510,9 +510,6 @@ HeapRegion::HeapRegion(uint hrs_index,
_rem_set = new HeapRegionRemSet(sharedOffsetArray, this);
assert(HeapRegionRemSet::num_par_rem_sets() > 0, "Invariant.");
// In case the region is allocated during a pause, note the top.
// We haven't done any counting on a brand new region.
_top_at_conc_mark_count = bottom();
}
class NextCompactionHeapRegionClosure: public HeapRegionClosure {
@ -585,14 +582,12 @@ void HeapRegion::note_self_forwarding_removal_start(bool during_initial_mark,
// we find to be self-forwarded on the next bitmap. So all
// objects need to be below NTAMS.
_next_top_at_mark_start = top();
set_top_at_conc_mark_count(bottom());
_next_marked_bytes = 0;
} else if (during_conc_mark) {
// During concurrent mark, all objects in the CSet (including
// the ones we find to be self-forwarded) are implicitly live.
// So all objects need to be above NTAMS.
_next_top_at_mark_start = bottom();
set_top_at_conc_mark_count(bottom());
_next_marked_bytes = 0;
}
}