inline void CMSBitMap::par_markRange(MemRegion mr) {
assert_locked();
mr = mr.intersection(MemRegion(_bmStartWord, _bmWordSize));
assert(!mr.is_empty(), "unexpected empty region");
// convert address range into offset range
size_t start_ofs = heapWordToOffset(mr.start());
size_t end_ofs = heapWordToOffset(mr.end());
// Range size is usually just 1 bit.
_bm.par_set_range(start_ofs, end_ofs, BitMap::small_range);
}
void ContiguousSpace::oop_iterate(MemRegion mr, OopClosure* blk) {
if (is_empty()) {
return;
}
MemRegion cur = MemRegion(bottom(), top());
mr = mr.intersection(cur);
if (mr.is_empty()) {
return;
}
if (mr.equals(cur)) {
oop_iterate(blk);
return;
}
assert(mr.end() <= top(), "just took an intersection above");
HeapWord* obj_addr = block_start(mr.start());
HeapWord* t = mr.end();
// Handle first object specially.
oop obj = oop(obj_addr);
SpaceMemRegionOopsIterClosure smr_blk(blk, mr);
obj_addr += obj->oop_iterate(&smr_blk);
while (obj_addr < t) {
oop obj = oop(obj_addr);
assert(obj->is_oop(), "expected an oop");
obj_addr += obj->size();
// If "obj_addr" is not greater than top, then the
// entire object "obj" is within the region.
if (obj_addr <= t) {
obj->oop_iterate(blk);
} else {
// "obj" extends beyond end of region
obj->oop_iterate(&smr_blk);
break;
}
};
}
void CardTableRS::clear(MemRegion mr) {
for (int i = 0; i < _ct_bs._cur_covered_regions; i++) {
MemRegion mri = mr.intersection(_ct_bs._covered[i]);
if (mri.byte_size() > 0) clear_MemRegion(mri);
}
}