8278031: MultiThreadedRefCounter should not use relaxed atomic decrement

Reviewed-by: kbarrett
openjdk · Dec 6, 2021 · d14f06a9630d2cd2a929d0e44ebe4bb10e20dbd4 · dholmes-ora · Dec 6, 2021 · d14f06a
1 parent 8d190dd
commit d14f06a9630d2cd2a929d0e44ebe4bb10e20dbd4
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/src/hotspot/share/jfr/utilities/jfrRefCountPointer.hpp b/src/hotspot/share/jfr/utilities/jfrRefCountPointer.hpp
@@ -116,7 +116,11 @@ class MultiThreadedRefCounter {
   }
 
   bool dec() const {
-    return 0 == Atomic::sub(&_refs, 1, memory_order_relaxed);
+    if (0 == Atomic::sub(&_refs, 1, memory_order_release)) {
+      OrderAccess::acquire();
+      return true;
+    }
+    return false;
   }
 
   intptr_t current() const {