200 _old_marking_cycles_completed_before) {
201 FullGCCount_lock->wait(Mutex::_no_safepoint_check_flag);
202 }
203 }
204 }
205 }
206
207 void VM_CGC_Operation::acquire_pending_list_lock() {
208 _pending_list_locker.lock();
209 }
210
211 void VM_CGC_Operation::release_and_notify_pending_list_lock() {
212 _pending_list_locker.unlock();
213 }
214
215 void VM_CGC_Operation::doit() {
216 GCIdMark gc_id_mark(_gc_id);
217 GCTraceCPUTime tcpu;
218 G1CollectedHeap* g1h = G1CollectedHeap::heap();
219 GCTraceTime(Info, gc) t(_printGCMessage, g1h->concurrent_mark()->gc_timer_cm(), GCCause::_no_gc, true);
220 IsGCActiveMark x;
221 _cl->do_void();
222 }
223
224 bool VM_CGC_Operation::doit_prologue() {
225 // Note the relative order of the locks must match that in
226 // VM_GC_Operation::doit_prologue() or deadlocks can occur
227 if (_needs_pending_list_lock) {
228 acquire_pending_list_lock();
229 }
230 Heap_lock->lock();
231 return true;
232 }
233
234 void VM_CGC_Operation::doit_epilogue() {
235 // Note the relative order of the unlocks must match that in
236 // VM_GC_Operation::doit_epilogue()
237 Heap_lock->unlock();
238 if (_needs_pending_list_lock) {
239 release_and_notify_pending_list_lock();
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200 _old_marking_cycles_completed_before) {
201 FullGCCount_lock->wait(Mutex::_no_safepoint_check_flag);
202 }
203 }
204 }
205 }
206
207 void VM_CGC_Operation::acquire_pending_list_lock() {
208 _pending_list_locker.lock();
209 }
210
211 void VM_CGC_Operation::release_and_notify_pending_list_lock() {
212 _pending_list_locker.unlock();
213 }
214
215 void VM_CGC_Operation::doit() {
216 GCIdMark gc_id_mark(_gc_id);
217 GCTraceCPUTime tcpu;
218 G1CollectedHeap* g1h = G1CollectedHeap::heap();
219 GCTraceTime(Info, gc) t(_printGCMessage, g1h->concurrent_mark()->gc_timer_cm(), GCCause::_no_gc, true);
220 TraceCollectorStats tcs(g1h->g1mm()->conc_collection_counters());
221 SvcGCMarker sgcm(SvcGCMarker::CONCURRENT);
222 IsGCActiveMark x;
223 _cl->do_void();
224 }
225
226 bool VM_CGC_Operation::doit_prologue() {
227 // Note the relative order of the locks must match that in
228 // VM_GC_Operation::doit_prologue() or deadlocks can occur
229 if (_needs_pending_list_lock) {
230 acquire_pending_list_lock();
231 }
232 Heap_lock->lock();
233 return true;
234 }
235
236 void VM_CGC_Operation::doit_epilogue() {
237 // Note the relative order of the unlocks must match that in
238 // VM_GC_Operation::doit_epilogue()
239 Heap_lock->unlock();
240 if (_needs_pending_list_lock) {
241 release_and_notify_pending_list_lock();
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