229 assert(_worker_id == _par_scan_state->worker_id(), "sanity");
230
231 const G1HeapRegionAttr state = _g1h->region_attr(obj);
232 if (state.is_in_cset()) {
233 oop forwardee;
234 markWord m = obj->mark_raw();
235 if (m.is_marked()) {
236 forwardee = (oop) m.decode_pointer();
237 } else {
238 forwardee = _par_scan_state->copy_to_survivor_space(state, obj, m);
239 }
240 assert(forwardee != NULL, "forwardee should not be NULL");
241 RawAccess<IS_NOT_NULL>::oop_store(p, forwardee);
242
243 if (barrier == G1BarrierCLD) {
244 do_cld_barrier(forwardee);
245 }
246 } else {
247 if (state.is_humongous()) {
248 _g1h->set_humongous_is_live(obj);
249 } else if ((barrier != G1BarrierNoOptRoots) && state.is_optional()) {
250 _par_scan_state->remember_root_into_optional_region(p);
251 }
252
253 // The object is not in collection set. If we're a root scanning
254 // closure during an initial mark pause then attempt to mark the object.
255 if (do_mark_object == G1MarkFromRoot) {
256 mark_object(obj);
257 }
258 }
259 trim_queue_partially();
260 }
261
262 template <class T> void G1RebuildRemSetClosure::do_oop_work(T* p) {
263 oop const obj = RawAccess<MO_VOLATILE>::oop_load(p);
264 if (obj == NULL) {
265 return;
266 }
267
268 if (HeapRegion::is_in_same_region(p, obj)) {
269 return;
270 }
|
229 assert(_worker_id == _par_scan_state->worker_id(), "sanity");
230
231 const G1HeapRegionAttr state = _g1h->region_attr(obj);
232 if (state.is_in_cset()) {
233 oop forwardee;
234 markWord m = obj->mark_raw();
235 if (m.is_marked()) {
236 forwardee = (oop) m.decode_pointer();
237 } else {
238 forwardee = _par_scan_state->copy_to_survivor_space(state, obj, m);
239 }
240 assert(forwardee != NULL, "forwardee should not be NULL");
241 RawAccess<IS_NOT_NULL>::oop_store(p, forwardee);
242
243 if (barrier == G1BarrierCLD) {
244 do_cld_barrier(forwardee);
245 }
246 } else {
247 if (state.is_humongous()) {
248 _g1h->set_humongous_is_live(obj);
249 } else if (state.is_optional()) {
250 // Skip collecting oops from nmethods into the optional collection set as
251 // we already collect the corresponding nmethods in the region's strong code
252 // roots set.
253 // If these were present there would be opportunity for multiple threads to try
254 // to change this oop* at the same time. Since embedded oops are not necessarily
255 // word-aligned, this could lead to word tearing during update and crashes.
256 if (barrier != G1BarrierNMethod) {
257 _par_scan_state->remember_root_into_optional_region(p);
258 }
259 }
260
261 // The object is not in collection set. If we're a root scanning
262 // closure during an initial mark pause then attempt to mark the object.
263 if (do_mark_object == G1MarkFromRoot) {
264 mark_object(obj);
265 }
266 }
267 trim_queue_partially();
268 }
269
270 template <class T> void G1RebuildRemSetClosure::do_oop_work(T* p) {
271 oop const obj = RawAccess<MO_VOLATILE>::oop_load(p);
272 if (obj == NULL) {
273 return;
274 }
275
276 if (HeapRegion::is_in_same_region(p, obj)) {
277 return;
278 }
|