1 /*

     2  * Copyright (c) 2015, 2016, 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   uintxFlag,

    35   doubleFlag,

    36   ccstrFlag,

    37   ccstrlistFlag,

    38   UnknownFlagType

    39 };

    40 

    41 static const char* flag_type_names[] = {

    42     "bool",

    43     "int",

    44     "uint",

    45     "double",

    46     "string",

    47     "string list",

    48     "unknown"

    49 };

    50 

    51 class DirectivesParser : public JSON {

    52 public:

    53   static bool has_file();

    54   static bool parse_from_flag();

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

    56   static int  parse_string(const char* string, outputStream* st);

    57   int install_directives();

    58 

    59 private:

    60   DirectivesParser(const char* text, outputStream* st, bool silent);

    61   ~DirectivesParser();

    62 

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

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

    65 

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

    67   typedef enum {

    68      type_c1,

    69      type_c2,

    70      type_enable,

    71      type_preset,

    72      type_match,

    73      type_inline,

    74 

    75      // After here, there is no correlation between

    76      // keytype and keys array

    77      //type_strategy,

    78      type_flag,

    79      //type_dir,

    80 

    81      // Synthetic.

    82      type_dir_array,

    83      type_directives,

    84      type_value_array

    85   } keytype;

    86 

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

    88   // this is how we map key-values

    89   typedef struct {

    90      const char *name;

    91      keytype     type;

    92      uint    allow_array_value : 1;

    93      uint    allowedmask;

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

    95      FlagType flag_type;

    96   } key;

    97 

    98   // Array with valid keys for the directive file

    99   static const key keys[];

   100   // Marker for outermost moosewings/array

   101   static const key dir_array_key;

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

   103   static const key dir_key;

   104   // Marker for a multi value

   105   static const key value_array_key;

   106 

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

   108   // Example of max stack usage:

   109   // depth 1: type_dir_array  [

   110   // depth 2: type_directives   {

   111   // depth 3: type_c1             c1: {

   112   // depth 4: type_inline           inline:

   113   // depth 5: type_value_array      [ ...

   114   static const uint MAX_DEPTH = 5;

   115   const key* stack[MAX_DEPTH];

   116   uint depth;

   117 

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

   119   bool push_key(const key* k);

   120   const key* current_key();

   121   const key* pop_key();

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

   123 

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

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

   126 

   127   CompilerDirectives* current_directive;

   128   DirectiveSet*       current_directiveset;

   129 

   130   void push_tmp(CompilerDirectives* dir);

   131   void clean_tmp();

   132   CompilerDirectives* pop_tmp();

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

   134   int _tmp_depth;               // Number of directives that has been parsed but not installed.

   135 

   136   static uint mask(keytype kt);

   137 

   138 #ifndef PRODUCT

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

   140 public:

   141   static void test();

   142 #endif

   143 };

   144 

   145 #endif // SHARE_VM_COMPILER_DIRECTIVESPARSER_HPP