--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/runtime/flags/jvmFlagRangeList.hpp	Thu Apr 26 11:19:05 2018 -0500
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2015, 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_RUNTIME_JVMFLAGRANGELIST_HPP
+#define SHARE_VM_RUNTIME_JVMFLAGRANGELIST_HPP
+
+#include "memory/metaspaceShared.hpp"
+#include "runtime/flags/jvmFlag.hpp"
+#include "utilities/growableArray.hpp"
+
+/*
+ * Here we have a mechanism for extracting ranges specified in flag macro tables.
+ *
+ * The specified ranges are used to verify that flags have valid values.
+ *
+ * An example of a range is "min <= flag <= max". Both "min" and "max" must be
+ * constant and can not change. If either "min" or "max" can change,
+ * then we need to use constraint instead.
+ */
+
+class CommandLineError : public AllStatic {
+public:
+  static void print(bool verbose, const char* msg, ...);
+};
+
+class JVMFlagRange : public CHeapObj<mtArguments> {
+private:
+  const char* _name;
+public:
+  // the "name" argument must be a string literal
+  JVMFlagRange(const char* name) { _name=name; }
+  ~JVMFlagRange() {}
+  const char* name() { return _name; }
+  virtual JVMFlag::Error check(bool verbose = true) { ShouldNotReachHere(); return JVMFlag::ERR_OTHER; }
+  virtual JVMFlag::Error check_int(int value, bool verbose = true) { ShouldNotReachHere(); return JVMFlag::ERR_OTHER; }
+  virtual JVMFlag::Error check_intx(intx value, bool verbose = true) { ShouldNotReachHere(); return JVMFlag::ERR_OTHER; }
+  virtual JVMFlag::Error check_uint(uint value, bool verbose = true) { ShouldNotReachHere(); return JVMFlag::ERR_OTHER; }
+  virtual JVMFlag::Error check_uintx(uintx value, bool verbose = true) { ShouldNotReachHere(); return JVMFlag::ERR_OTHER; }
+  virtual JVMFlag::Error check_uint64_t(uint64_t value, bool verbose = true) { ShouldNotReachHere(); return JVMFlag::ERR_OTHER; }
+  virtual JVMFlag::Error check_size_t(size_t value, bool verbose = true) { ShouldNotReachHere(); return JVMFlag::ERR_OTHER; }
+  virtual JVMFlag::Error check_double(double value, bool verbose = true) { ShouldNotReachHere(); return JVMFlag::ERR_OTHER; }
+  virtual void print(outputStream* st) { ; }
+};
+
+class JVMFlagRangeList : public AllStatic {
+  static GrowableArray<JVMFlagRange*>* _ranges;
+public:
+  static void init();
+  static int length() { return (_ranges != NULL) ? _ranges->length() : 0; }
+  static JVMFlagRange* at(int i) { return (_ranges != NULL) ? _ranges->at(i) : NULL; }
+  static JVMFlagRange* find(const char* name);
+  static void add(JVMFlagRange* range) { _ranges->append(range); }
+  static void print(outputStream* st, const char* name, RangeStrFunc default_range_str_func);
+  // Check the final values of all flags for ranges.
+  static bool check_ranges();
+};
+
+#endif // SHARE_VM_RUNTIME_JVMFLAGRANGELIST_HPP