Fix up potential stale pointer after GC

Fixes #16351 Signed-off-by: Tobi Ajila <atobia@ca.ibm.com>
eclipse-openj9 · Dec 5, 2022 · ef7a4c8 · ef7a4c8
1 parent d1e10d8
commit ef7a4c8
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/runtime/j9vm/javanextvmi.cpp b/runtime/j9vm/javanextvmi.cpp
@@ -343,6 +343,10 @@ JVM_VirtualThreadMountEnd(JNIEnv *env, jobject thread, jboolean firstMount)
 			vmFuncs->setHeapOutOfMemoryError(currentThread);
 			goto release1;
 		}
+
+		/* Re-fetch as the memory allocation above may have moved the object. */
+		threadObj = J9_JNI_UNWRAP_REFERENCE(thread);
+
 		J9VMJAVALANGVIRTUALTHREAD_SET_STATE(currentThread, rootVirtualThread, J9VM_VIRTUALTHREAD_ROOT_NODE_STATE);
 	}