--- a/src/hotspot/share/services/mallocSiteTable.hpp	Mon Nov 25 12:30:24 2019 +0100
+++ b/src/hotspot/share/services/mallocSiteTable.hpp	Mon Nov 25 12:31:39 2019 +0100
@@ -153,7 +153,7 @@
     // Acquire shared lock.
     // Return true if shared access is granted.
     inline bool sharedLock() {
-      jint res = Atomic::add(1, _lock);
+      jint res = Atomic::add(_lock, 1);
       if (res < 0) {
         Atomic::dec(_lock);
         return false;