From 379f9da98cb36003b6694acf2ee6ef5e7758e0d0 Mon Sep 17 00:00:00 2001
From: Mateusz Rzeszutek <mrzeszutek@splunk.com>
Date: Tue, 12 Oct 2021 19:54:40 +0200
Subject: [PATCH] Back VirtualField with a volatile field (#4355)

---
 .../javaagent/tooling/field/RealFieldInjector.java           | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/javaagent-tooling/src/main/java/io/opentelemetry/javaagent/tooling/field/RealFieldInjector.java b/javaagent-tooling/src/main/java/io/opentelemetry/javaagent/tooling/field/RealFieldInjector.java
index 6cb17b65ca83..b85fcad19c14 100644
--- a/javaagent-tooling/src/main/java/io/opentelemetry/javaagent/tooling/field/RealFieldInjector.java
+++ b/javaagent-tooling/src/main/java/io/opentelemetry/javaagent/tooling/field/RealFieldInjector.java
@@ -124,7 +124,10 @@ public void visitEnd() {
         if (!foundField) {
           cv.visitField(
               // Field should be transient to avoid being serialized with the object.
-              Opcodes.ACC_PRIVATE | Opcodes.ACC_TRANSIENT | Opcodes.ACC_SYNTHETIC,
+              Opcodes.ACC_PRIVATE
+                  | Opcodes.ACC_VOLATILE
+                  | Opcodes.ACC_TRANSIENT
+                  | Opcodes.ACC_SYNTHETIC,
               fieldName,
               fieldType.getDescriptor(),
               null,