1 /*

     2  * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    24 

    25 #ifndef SHARE_VM_COMPILER_DIRECTIVESPARSER_HPP

    26 #define SHARE_VM_COMPILER_DIRECTIVESPARSER_HPP

    27 

    28 #include "utilities/json.hpp"

    29 #include "compiler/compilerDirectives.hpp"

    30 

    31 enum FlagType {

    32   boolFlag,

    33   intxFlag,

    34   doubleFlag,

    35   ccstrFlag,

    36   UnknownFlagType

    37 };

    38 

    39 static const char* flag_type_names[] = {

    40     "bool",

    41     "int",

    42     "double",

    43     "string",

    44     "unknown"

    45 };

    46 

    47 class DirectivesParser : public JSON {

    48 public:

    49   static bool has_file();

    50   static bool parse_from_flag();

    51   static bool parse_from_file(const char* filename, outputStream* st);

    52   static bool parse_string(const char* string, outputStream* st);

    53   bool install_directives();

    54 

    55 private:

    56   DirectivesParser(const char* text, outputStream* st);

    57   ~DirectivesParser();

    58 

    59   bool callback(JSON_TYPE t, JSON_VAL* v, uint level);

    60   static bool parse_from_file_inner(const char* filename, outputStream* st);

    61 

    62   // types of "keys". i.e recognized <key>:<value> pairs in our JSON syntax

    63   typedef enum {

    64      type_c1,

    65      type_c2,

    66      type_enable,

    67      type_preset,

    68      type_match,

    69      type_inline,

    70 

    71      // After here, there is no correlation between

    72      // keytype and keys array

    73      //type_strategy,

    74      type_flag,

    75      //type_dir,

    76 

    77      // Synthetic.

    78      type_dir_array,

    79      type_directives,

    80      type_value_array

    81   } keytype;

    82 

    83   // name, type, dtd info and maybe a setter

    84   // this is how we map key-values

    85   typedef struct {

    86      const char *name;

    87      keytype     type;

    88      uint    allow_array_value : 1;

    89      uint    allowedmask;

    90      void (DirectiveSet::*set)(void* arg);

    91      FlagType flag_type;

    92   } key;

    93 

    94   // Array with valid keys for the directive file

    95   static const key keys[];

    96   // Marker for outermost moosewings/array

    97   static const key dir_array_key;

    98   // Marker for a directives set (these are "implicit" objects, as in not named)

    99   static const key dir_key;

   100   // Marker for a multi value

   101   static const key value_array_key;

   102 

   103   // A compiler directive shouldn't be able to use more than 5 stack slots.

   104   // Example of max stack usage:

   105   // depth 1: type_dir_array  [

   106   // depth 2: type_directives   {

   107   // depth 3: type_c1             c1: {

   108   // depth 4: type_inline           inline:

   109   // depth 5: type_value_array      [ ...

   110   static const uint MAX_DEPTH = 5;

   111   const key* stack[MAX_DEPTH];

   112   uint depth;

   113 

   114   bool push_key(const char* str, size_t len);

   115   bool push_key(const key* k);

   116   const key* current_key();

   117   const key* pop_key();

   118   static const key* lookup_key(const char* s, size_t len);

   119 

   120   bool set_option(JSON_TYPE t, JSON_VAL* v);

   121   bool set_option_flag(JSON_TYPE t, JSON_VAL* v, const key* option_key, DirectiveSet* set);

   122 

   123   CompilerDirectives* current_directive;

   124   DirectiveSet*       current_directiveset;

   125 

   126   void push_tmp(CompilerDirectives* dir);

   127   CompilerDirectives* pop_tmp();

   128   CompilerDirectives* _tmp_top; // temporary storage for dirs while parsing

   129 

   130   static uint mask(keytype kt);

   131 

   132 #ifndef PRODUCT

   133   static void test(const char* json, bool valid);

   134 public:

   135   static bool test();

   136 #endif

   137 };

   138 

   139 #endif // SHARE_VM_COMPILER_DIRECTIVESPARSER_HPP