From a316c06e03e06b86ceca376cf20dcb9c526905f5 Mon Sep 17 00:00:00 2001
From: Zhengyu Gu <zgu@openjdk.org>
Date: Wed, 3 Nov 2021 12:08:37 +0000
Subject: [PATCH] 8275730: Relax memory constraint on MultiThreadedRefCounter

Reviewed-by: mgronlun, minqi
---
 src/hotspot/share/jfr/utilities/jfrRefCountPointer.hpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/hotspot/share/jfr/utilities/jfrRefCountPointer.hpp b/src/hotspot/share/jfr/utilities/jfrRefCountPointer.hpp
index d24da8fdd82b0..149047837b7ef 100644
--- a/src/hotspot/share/jfr/utilities/jfrRefCountPointer.hpp
+++ b/src/hotspot/share/jfr/utilities/jfrRefCountPointer.hpp
@@ -112,15 +112,15 @@ class MultiThreadedRefCounter {
   MultiThreadedRefCounter() : _refs(0) {}
 
   void inc() const {
-    Atomic::add(&_refs, 1);
+    Atomic::inc(&_refs, memory_order_relaxed);
   }
 
   bool dec() const {
-    return 0 == Atomic::add(&_refs, (-1));
+    return 0 == Atomic::sub(&_refs, 1, memory_order_relaxed);
   }
 
   intptr_t current() const {
-   return _refs;
+    return Atomic::load(&_refs);
   }
 };