void CardTableRS::younger_refs_in_space_iterate(Space* sp,
OopsInGenClosure* cl) {
const MemRegion urasm = sp->used_region_at_save_marks();
#ifdef ASSERT
// Convert the assertion check to a warning if we are running
// CMS+ParNew until related bug is fixed.
MemRegion ur = sp->used_region();
assert(ur.contains(urasm) || (UseConcMarkSweepGC && UseParNewGC),
err_msg("Did you forget to call save_marks()? "
"[" PTR_FORMAT ", " PTR_FORMAT ") is not contained in "
"[" PTR_FORMAT ", " PTR_FORMAT ")",
urasm.start(), urasm.end(), ur.start(), ur.end()));
// In the case of CMS+ParNew, issue a warning
if (!ur.contains(urasm)) {
assert(UseConcMarkSweepGC && UseParNewGC, "Tautology: see assert above");
warning("CMS+ParNew: Did you forget to call save_marks()? "
"[" PTR_FORMAT ", " PTR_FORMAT ") is not contained in "
"[" PTR_FORMAT ", " PTR_FORMAT ")",
urasm.start(), urasm.end(), ur.start(), ur.end());
MemRegion ur2 = sp->used_region();
MemRegion urasm2 = sp->used_region_at_save_marks();
if (!ur.equals(ur2)) {
warning("CMS+ParNew: Flickering used_region()!!");
}
if (!urasm.equals(urasm2)) {
warning("CMS+ParNew: Flickering used_region_at_save_marks()!!");
}
ShouldNotReachHere();
}
#endif
_ct_bs->non_clean_card_iterate_possibly_parallel(sp, urasm, cl, this);
}
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;
}
};
}