282   if (forwardee == nullptr) {  // forwardee is null when forwarding is successful
283     // We won any races, we "own" this object.
284     oop new_obj = cast_to_oop(new_obj_addr);
285     assert(new_obj == o->forwardee(), "Sanity");
286 
287     // Increment age if obj still in new generation. Now that
288     // we're dealing with a markWord that cannot change, it is
289     // okay to use the non mt safe oop methods.
290     if (!new_obj_is_tenured) {
291       new_obj->incr_age();
292       assert(young_space()->contains(new_obj), "Attempt to push non-promoted obj");
293     }
294 
295     ContinuationGCSupport::transform_stack_chunk(new_obj);
296 
297     // Do the size comparison first with new_obj_size, which we
298     // already have. Hopefully, only a few objects are larger than
299     // _min_array_size_for_chunking, and most of them will be arrays.
300     // So, the objArray test would be very infrequent.
301     if (new_obj_size > _min_array_size_for_chunking &&
302         klass->is_objArray_klass() &&
303         PSChunkLargeArrays) {
304       push_objArray(o, new_obj);
305     } else {
306       // we'll just push its contents
307       push_contents(new_obj);
308 
309       if (StringDedup::is_enabled_string(klass) &&
310           psStringDedup::is_candidate_from_evacuation(new_obj, new_obj_is_tenured)) {
311         _string_dedup_requests.add(o);
312       }
313     }
314     return new_obj;
315   } else {
316     // We lost, someone else "owns" this object.
317     assert(o->is_forwarded(), "Object must be forwarded if the cas failed.");
318     assert(o->forwardee() == forwardee, "invariant");
319 
320     if (new_obj_is_tenured) {
321       _old_lab.unallocate_object(new_obj_addr, new_obj_size);
322     } else {

282   if (forwardee == nullptr) {  // forwardee is null when forwarding is successful
283     // We won any races, we "own" this object.
284     oop new_obj = cast_to_oop(new_obj_addr);
285     assert(new_obj == o->forwardee(), "Sanity");
286 
287     // Increment age if obj still in new generation. Now that
288     // we're dealing with a markWord that cannot change, it is
289     // okay to use the non mt safe oop methods.
290     if (!new_obj_is_tenured) {
291       new_obj->incr_age();
292       assert(young_space()->contains(new_obj), "Attempt to push non-promoted obj");
293     }
294 
295     ContinuationGCSupport::transform_stack_chunk(new_obj);
296 
297     // Do the size comparison first with new_obj_size, which we
298     // already have. Hopefully, only a few objects are larger than
299     // _min_array_size_for_chunking, and most of them will be arrays.
300     // So, the objArray test would be very infrequent.
301     if (new_obj_size > _min_array_size_for_chunking &&
302         klass->is_refArray_klass() &&
303         PSChunkLargeArrays) {
304       push_objArray(o, new_obj);
305     } else {
306       // we'll just push its contents
307       push_contents(new_obj);
308 
309       if (StringDedup::is_enabled_string(klass) &&
310           psStringDedup::is_candidate_from_evacuation(new_obj, new_obj_is_tenured)) {
311         _string_dedup_requests.add(o);
312       }
313     }
314     return new_obj;
315   } else {
316     // We lost, someone else "owns" this object.
317     assert(o->is_forwarded(), "Object must be forwarded if the cas failed.");
318     assert(o->forwardee() == forwardee, "invariant");
319 
320     if (new_obj_is_tenured) {
321       _old_lab.unallocate_object(new_obj_addr, new_obj_size);
322     } else {