8151265: Add a way to extend UL tags

Reviewed-by: dholmes, kbarrett

hotspot/src/share/vm/logging/logTag.hpp

@@ -24,6 +24,7 @@
 #ifndef SHARE_VM_LOGGING_LOGTAG_HPP
 #define SHARE_VM_LOGGING_LOGTAG_HPP
 
+#include "logging/logTag_ext.hpp"
 #include "memory/allocation.hpp"
 #include "utilities/globalDefinitions.hpp"
 
@@ -91,7 +92,8 @@
   LOG_TAG(verboseverification) \
   LOG_TAG(verify) \
   LOG_TAG(vmoperation) \
-  LOG_TAG(vtables)
+  LOG_TAG(vtables) \
+  LOG_TAG_LIST_EXT
 
 #define PREFIX_LOG_TAG(T) (LogTag::_##T)
 

hotspot/src/share/vm/logging/logTag_ext.hpp

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2016, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+#ifndef SHARE_VM_LOGGING_LOGTAG_EXT_HPP
+#define SHARE_VM_LOGGING_LOGTAG_EXT_HPP
+
+#define LOG_TAG_LIST_EXT
+
+#endif // SHARE_VM_LOGGING_LOGTAG_EXT_HPP