src/share/vm/gc/g1/g1ConcurrentMark.cpp

@@ -370,24 +370,30 @@
   assert(res == NULL || res->is_survivor(), "post-condition");
 
   return res;
 }
 
+void G1CMRootRegions::notify_scan_done() {
+  MutexLockerEx x(RootRegionScan_lock, Mutex::_no_safepoint_check_flag);
+  _scan_in_progress = false;
+  RootRegionScan_lock->notify_all();
+}
+
+void G1CMRootRegions::cancel_scan() {
+  notify_scan_done();
+}
+
 void G1CMRootRegions::scan_finished() {
   assert(scan_in_progress(), "pre-condition");
 
   // Currently, only survivors can be root regions.
   if (!_should_abort) {
     assert(_next_survivor == NULL, "we should have claimed all survivors");
   }
   _next_survivor = NULL;
 
-  {
-    MutexLockerEx x(RootRegionScan_lock, Mutex::_no_safepoint_check_flag);
-    _scan_in_progress = false;
-    RootRegionScan_lock->notify_all();
-  }
+  notify_scan_done();
 }
 
 bool G1CMRootRegions::wait_until_scan_finished() {
   if (!scan_in_progress()) return false;