diff --git a/interop/run_endpoint.sh b/interop/run_endpoint.sh
index 6a64002a..62474abd 100644
--- a/interop/run_endpoint.sh
+++ b/interop/run_endpoint.sh
@@ -14,6 +14,8 @@ esac
 
 LOG_DIR="/logs"
 cd /xquic_bin/
+ulimit -c unlimited
+
 
 if [ "$ROLE" == "client" ]; then
     # Wait for the simulator to start up.
@@ -101,3 +103,10 @@ elif [ "$ROLE" == "server" ]; then
     echo "./demo_server $ARGS"
     ./demo_server $ARGS
 fi
+
+# debug for coredump
+core_res=`find . -name "core*"`
+if [ "$core_res" != "" ]; then
+    tar -zcvf core.tar.gz *
+    cp core.tar.gz /logs/
+fi