Merge pull request #8879 from The-OpenROAD-Project-staging/TR-datarace-fix

DRT: fix datarace on frNet::modified_

Author: maliberty

src/drt/src/dr/FlexDR_end.cpp

@@ -26,7 +26,9 @@ void FlexDRWorker::endGetModNets(frOrderedIdSet<frNet*>& modNets)
 {
   for (auto& net : nets_) {
     if (net->isModified()) {
-      modNets.insert(net->getFrNet());
+      auto fr_net = net->getFrNet();
+      fr_net->setModified(true);
+      modNets.insert(fr_net);
     }
   }
   // change modified flag to true if another subnet get routed

src/drt/src/dr/FlexDR_maze.cpp

@@ -1906,9 +1906,6 @@ void FlexDRWorker::route_queue_main(std::queue<RouteQueueEntry>& rerouteQueue)
       }
       // init
       net->setModified(true);
-      if (net->getFrNet()) {
-        net->getFrNet()->setModified(true);
-      }
       net->setNumMarkers(0);
       if (graphics_) {
         graphics_->startNet(net);