8360474: Add missing include guards for some HotSpot headers

Reviewed-by: mhaessig, stefank, dholmes

src/hotspot/os/aix/decoder_aix.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 2025, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2013 SAP SE. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
@@ -23,6 +23,9 @@
  *
  */
 
+#ifndef OS_AIX_DECODER_AIX_HPP
+#define OS_AIX_DECODER_AIX_HPP
+
 #include "utilities/decoder.hpp"
 #include "porting_aix.hpp"
 
@@ -44,3 +47,4 @@ class AIXDecoder: public AbstractDecoder {
 
 };
 
+#endif // OS_AIX_DECODER_AIX_HPP

src/hotspot/share/gc/g1/g1SharedClosures.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2025, Oracle and/or its affiliates. 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
@@ -22,6 +22,9 @@
  *
  */
 
+#ifndef SHARE_GC_G1_G1SHAREDCLOSURES_HPP
+#define SHARE_GC_G1_G1SHAREDCLOSURES_HPP
+
 #include "gc/g1/g1NMethodClosure.hpp"
 #include "gc/g1/g1OopClosures.hpp"
 #include "memory/iterator.hpp"
@@ -54,3 +57,5 @@ public:
     _clds(&_oops_in_cld, process_only_dirty),
     _nmethods(pss->worker_id(), &_oops_in_nmethod, should_mark) {}
 };
+
+#endif // SHARE_GC_G1_G1SHAREDCLOSURES_HPP

src/hotspot/share/opto/library_call.hpp

@@ -22,6 +22,9 @@
  *
  */
 
+#ifndef SHARE_OPTO_LIBRARY_CALL_HPP
+#define SHARE_OPTO_LIBRARY_CALL_HPP
+
 #include "ci/ciMethod.hpp"
 #include "classfile/javaClasses.hpp"
 #include "opto/callGenerator.hpp"
@@ -416,3 +419,4 @@ class LibraryCallKit : public GraphKit {
   bool inline_blackhole();
 };
 
+#endif // SHARE_OPTO_LIBRARY_CALL_HPP

src/hotspot/share/utilities/packedTable.hpp

@@ -22,6 +22,9 @@
  *
  */
 
+#ifndef SHARE_UTILITIES_PACKEDTABLE_HPP
+#define SHARE_UTILITIES_PACKEDTABLE_HPP
+
 #include "oops/array.hpp"
 #include "utilities/globalDefinitions.hpp"
 
@@ -121,3 +124,5 @@ public:
     }
   }
 };
+
+#endif // SHARE_UTILITIES_PACKEDTABLE_HPP