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