src/hotspot/share/gc/shared/markBitMap.cpp

rev 50076 : Fold Partial GC into Traversal GC

*** 77,81 ****
--- 77,90 ----
    assert(!mr.is_empty(), "unexpected empty region");
    // convert address range into offset range
    _bm.clear_large_range(heapWordToOffset(mr.start()),
                          heapWordToOffset(mr.end()));
  }
+ 
+ void MarkBitMap::copy_from(MarkBitMap* other, MemRegion mr) {
+   guarantee(startWord() == other->startWord(), "bitmaps must cover same region");
+   guarantee(endWord() == other->endWord(), "bitmaps must cover same region");
+   mr.intersection(MemRegion(_bmStartWord, _bmWordSize));
+   size_t start_offset = heapWordToOffset(mr.start());
+   size_t end_offset = heapWordToOffset(mr.end());
+   _bm.copy_from(other->_bm, start_offset, end_offset);
+ }