8270320: JDK-8270110 committed invalid copyright headers
Backport-of: 353e9c8607e3a433aac786bd7b818d77ff75dd11
diff --git a/test/hotspot/jtreg/gc/shenandoah/jni/TestStringCriticalWithDedup.java b/test/hotspot/jtreg/gc/shenandoah/jni/TestStringCriticalWithDedup.java
index 8bd3d88..4eaf93f 100644
--- a/test/hotspot/jtreg/gc/shenandoah/jni/TestStringCriticalWithDedup.java
+++ b/test/hotspot/jtreg/gc/shenandoah/jni/TestStringCriticalWithDedup.java
@@ -1,5 +1,6 @@
/*
* Copyright (c) 2021, Red Hat, Inc. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
diff --git a/test/hotspot/jtreg/gc/shenandoah/jni/libTestStringCriticalWithDedup.c b/test/hotspot/jtreg/gc/shenandoah/jni/libTestStringCriticalWithDedup.c
index 665ae58..6b09818 100644
--- a/test/hotspot/jtreg/gc/shenandoah/jni/libTestStringCriticalWithDedup.c
+++ b/test/hotspot/jtreg/gc/shenandoah/jni/libTestStringCriticalWithDedup.c
@@ -1,5 +1,6 @@
/*
* Copyright (c) 2021, Red Hat, Inc. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
