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8141501: Problems with BitMap buffer management

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Reviewed-by: pliden, kbarrett
This commit is contained in:
Stefan Karlsson 2016-05-03 22:45:27 +02:00
parent 46d52062aa
commit f8be292b88
41 changed files with 539 additions and 319 deletions
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3
hotspot/src/share/vm/gc/cms/concurrentMarkSweepGeneration.cpp
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@ -5666,10 +5666,9 @@ bool CMSBitMap::allocate(MemRegion mr) {
}
assert(_virtual_space.committed_size() == brs.size(),
"didn't reserve backing store for all of CMS bit map?");
_bm.set_map((BitMap::bm_word_t*)_virtual_space.low());
assert(_virtual_space.committed_size() << (_shifter + LogBitsPerByte) >=
_bmWordSize, "inconsistency in bit map sizing");
_bm.set_size(_bmWordSize >> _shifter);
_bm = BitMapView((BitMap::bm_word_t*)_virtual_space.low(), _bmWordSize >> _shifter);
// bm.clear(); // can we rely on getting zero'd memory? verify below
assert(isAllClear(),