--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/compiler/directivesParser.hpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,145 @@
+/*
+ * 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_COMPILER_DIRECTIVESPARSER_HPP
+#define SHARE_VM_COMPILER_DIRECTIVESPARSER_HPP
+
+#include "utilities/json.hpp"
+#include "compiler/compilerDirectives.hpp"
+
+enum FlagType {
+  boolFlag,
+  intxFlag,
+  uintxFlag,
+  doubleFlag,
+  ccstrFlag,
+  ccstrlistFlag,
+  UnknownFlagType
+};
+
+static const char* flag_type_names[] = {
+    "bool",
+    "int",
+    "uint",
+    "double",
+    "string",
+    "string list",
+    "unknown"
+};
+
+class DirectivesParser : public JSON {
+public:
+  static bool has_file();
+  static bool parse_from_flag();
+  static bool parse_from_file(const char* filename, outputStream* st);
+  static int  parse_string(const char* string, outputStream* st);
+  int install_directives();
+
+private:
+  DirectivesParser(const char* text, outputStream* st, bool silent);
+  ~DirectivesParser();
+
+  bool callback(JSON_TYPE t, JSON_VAL* v, uint level);
+  static bool parse_from_file_inner(const char* filename, outputStream* st);
+
+  // types of "keys". i.e recognized <key>:<value> pairs in our JSON syntax
+  typedef enum {
+     type_c1,
+     type_c2,
+     type_enable,
+     type_preset,
+     type_match,
+     type_inline,
+
+     // After here, there is no correlation between
+     // keytype and keys array
+     //type_strategy,
+     type_flag,
+     //type_dir,
+
+     // Synthetic.
+     type_dir_array,
+     type_directives,
+     type_value_array
+  } keytype;
+
+  // name, type, dtd info and maybe a setter
+  // this is how we map key-values
+  typedef struct {
+     const char *name;
+     keytype     type;
+     uint    allow_array_value : 1;
+     uint    allowedmask;
+     void (DirectiveSet::*set)(void* arg);
+     FlagType flag_type;
+  } key;
+
+  // Array with valid keys for the directive file
+  static const key keys[];
+  // Marker for outermost moosewings/array
+  static const key dir_array_key;
+  // Marker for a directives set (these are "implicit" objects, as in not named)
+  static const key dir_key;
+  // Marker for a multi value
+  static const key value_array_key;
+
+  // A compiler directive shouldn't be able to use more than 5 stack slots.
+  // Example of max stack usage:
+  // depth 1: type_dir_array  [
+  // depth 2: type_directives   {
+  // depth 3: type_c1             c1: {
+  // depth 4: type_inline           inline:
+  // depth 5: type_value_array      [ ...
+  static const uint MAX_DEPTH = 5;
+  const key* stack[MAX_DEPTH];
+  uint depth;
+
+  bool push_key(const char* str, size_t len);
+  bool push_key(const key* k);
+  const key* current_key();
+  const key* pop_key();
+  static const key* lookup_key(const char* s, size_t len);
+
+  bool set_option(JSON_TYPE t, JSON_VAL* v);
+  bool set_option_flag(JSON_TYPE t, JSON_VAL* v, const key* option_key, DirectiveSet* set);
+
+  CompilerDirectives* current_directive;
+  DirectiveSet*       current_directiveset;
+
+  void push_tmp(CompilerDirectives* dir);
+  void clean_tmp();
+  CompilerDirectives* pop_tmp();
+  CompilerDirectives* _tmp_top; // temporary storage for dirs while parsing
+  int _tmp_depth;               // Number of directives that has been parsed but not installed.
+
+  static uint mask(keytype kt);
+
+#ifndef PRODUCT
+  static void test(const char* json, bool valid);
+public:
+  static void test();
+#endif
+};
+
+#endif // SHARE_VM_COMPILER_DIRECTIVESPARSER_HPP