188 // actually taking the lock and doing the wait.
189 if (g1h->old_marking_cycles_completed() <=
190 _old_marking_cycles_completed_before) {
191 // The following is largely copied from CMS
192
193 Thread* thr = Thread::current();
194 assert(thr->is_Java_thread(), "invariant");
195 JavaThread* jt = (JavaThread*)thr;
196 ThreadToNativeFromVM native(jt);
197
198 MutexLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag);
199 while (g1h->old_marking_cycles_completed() <=
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 assert(_needs_pending_list_lock, "don't call this otherwise");
209 _pending_list_locker.lock();
210 }
211
212 void VM_CGC_Operation::release_and_notify_pending_list_lock() {
213 assert(_needs_pending_list_lock, "don't call this otherwise");
214 _pending_list_locker.unlock();
215 }
216
217 void VM_CGC_Operation::doit() {
218 GCIdMark gc_id_mark(_gc_id);
219 GCTraceCPUTime tcpu;
220 G1CollectedHeap* g1h = G1CollectedHeap::heap();
221 GCTraceTime(Info, gc) t(_printGCMessage, g1h->gc_timer_cm(), GCCause::_no_gc, true);
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;
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188 // actually taking the lock and doing the wait.
189 if (g1h->old_marking_cycles_completed() <=
190 _old_marking_cycles_completed_before) {
191 // The following is largely copied from CMS
192
193 Thread* thr = Thread::current();
194 assert(thr->is_Java_thread(), "invariant");
195 JavaThread* jt = (JavaThread*)thr;
196 ThreadToNativeFromVM native(jt);
197
198 MutexLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag);
199 while (g1h->old_marking_cycles_completed() <=
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->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;
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