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 doubleFlag, 35 ccstrFlag, 36 ccstrlistFlag, 37 UnknownFlagType 38 }; 39 40 static const char* flag_type_names[] = { 41 "bool", 42 "int", 43 "double", 44 "string", 45 "string list", 46 "unknown" 47 }; 48 49 class DirectivesParser : public JSON { 50 public: 51 static bool has_file(); 52 static bool parse_from_flag(); 53 static bool parse_from_file(const char* filename, outputStream* st); 54 static int parse_string(const char* string, outputStream* st); 55 int install_directives(); 56 57 private: 58 DirectivesParser(const char* text, outputStream* st); 59 ~DirectivesParser(); 60 61 bool callback(JSON_TYPE t, JSON_VAL* v, uint level); 62 static bool parse_from_file_inner(const char* filename, outputStream* st); 63 64 // types of "keys". i.e recognized <key>:<value> pairs in our JSON syntax 65 typedef enum { 66 type_c1, 67 type_c2, 68 type_enable, 69 type_preset, 70 type_match, 71 type_inline, 72 73 // After here, there is no correlation between 74 // keytype and keys array 75 //type_strategy, 76 type_flag, 77 //type_dir, 78 79 // Synthetic. 80 type_dir_array, 81 type_directives, 82 type_value_array 83 } keytype; 84 85 // name, type, dtd info and maybe a setter 86 // this is how we map key-values 87 typedef struct { 88 const char *name; 89 keytype type; 90 uint allow_array_value : 1; 91 uint allowedmask; 92 void (DirectiveSet::*set)(void* arg); 93 FlagType flag_type; 94 } key; 95 96 // Array with valid keys for the directive file 97 static const key keys[]; 98 // Marker for outermost moosewings/array 99 static const key dir_array_key; 100 // Marker for a directives set (these are "implicit" objects, as in not named) 101 static const key dir_key; 102 // Marker for a multi value 103 static const key value_array_key; 104 105 // A compiler directive shouldn't be able to use more than 5 stack slots. 106 // Example of max stack usage: 107 // depth 1: type_dir_array [ 108 // depth 2: type_directives { 109 // depth 3: type_c1 c1: { 110 // depth 4: type_inline inline: 111 // depth 5: type_value_array [ ... 112 static const uint MAX_DEPTH = 5; 113 const key* stack[MAX_DEPTH]; 114 uint depth; 115 116 bool push_key(const char* str, size_t len); 117 bool push_key(const key* k); 118 const key* current_key(); 119 const key* pop_key(); 120 static const key* lookup_key(const char* s, size_t len); 121 122 bool set_option(JSON_TYPE t, JSON_VAL* v); 123 bool set_option_flag(JSON_TYPE t, JSON_VAL* v, const key* option_key, DirectiveSet* set); 124 125 CompilerDirectives* current_directive; 126 DirectiveSet* current_directiveset; 127 128 void push_tmp(CompilerDirectives* dir); 129 void clean_tmp(); 130 CompilerDirectives* pop_tmp(); 131 CompilerDirectives* _tmp_top; // temporary storage for dirs while parsing 132 int _tmp_depth; // Number of directives that has been parsed but not installed. 133 134 static uint mask(keytype kt); 135 136 #ifndef PRODUCT 137 static void test(const char* json, bool valid); 138 public: 139 static void test(); 140 #endif 141 }; 142 143 #endif // SHARE_VM_COMPILER_DIRECTIVESPARSER_HPP