Mike Dodd | 8cfa702 | 2010-11-17 11:12:26 -0800 | [diff] [blame] | 1 | /** |
| 2 | * @file demangle_java_symbol.cpp |
| 3 | * Demangle a java symbol |
| 4 | * |
| 5 | * @remark Copyright 2007 OProfile authors |
| 6 | * @remark Read the file COPYING |
| 7 | * |
| 8 | * @author Philippe Elie |
| 9 | */ |
| 10 | |
| 11 | #include "demangle_java_symbol.h" |
| 12 | |
| 13 | #include <algorithm> |
| 14 | |
| 15 | using namespace std; |
| 16 | |
| 17 | namespace { |
| 18 | |
| 19 | /** |
| 20 | * The grammar we implement: |
| 21 | * |
| 22 | * field_type: |
| 23 | * base_type | object_type | array_type |
| 24 | * base_type: |
| 25 | * B | C | D | F | I | J | S | Z |
| 26 | * object_type: |
| 27 | * L<classname>; |
| 28 | * array_type: |
| 29 | * [field_type |
| 30 | * method_descriptor: |
| 31 | * ( field_type* ) return_descriptor |
| 32 | * return_descriptor: |
| 33 | * field_type | V |
| 34 | * method_signature: |
| 35 | * object_type method_name method_descriptor |
| 36 | * |
| 37 | */ |
| 38 | |
| 39 | bool array_type(string & result, |
| 40 | string::const_iterator & begin, string::const_iterator end); |
| 41 | bool object_type(string & result, |
| 42 | string::const_iterator & begin, string::const_iterator end); |
| 43 | |
| 44 | |
| 45 | bool base_type(string & result, |
| 46 | string::const_iterator & begin, string::const_iterator end) |
| 47 | { |
| 48 | bool ret = true; |
| 49 | |
| 50 | if (begin == end) |
| 51 | return false; |
| 52 | |
| 53 | switch (*begin) { |
| 54 | case 'B': result += "byte"; break; |
| 55 | case 'C': result += "char"; break; |
| 56 | case 'D': result += "double"; break; |
| 57 | case 'F': result += "float"; break; |
| 58 | case 'I': result += "int"; break; |
| 59 | case 'J': result += "long"; break; |
| 60 | case 'S': result += "short"; break; |
| 61 | case 'Z': result += "boolean"; break; |
| 62 | default: ret = false; break; |
| 63 | } |
| 64 | |
| 65 | if (ret) |
| 66 | ++begin; |
| 67 | return ret; |
| 68 | } |
| 69 | |
| 70 | |
| 71 | bool field_type(string & result, |
| 72 | string::const_iterator & begin, string::const_iterator end) |
| 73 | { |
| 74 | if (base_type(result, begin, end)) |
| 75 | return true; |
| 76 | |
| 77 | if (object_type(result, begin, end)) |
| 78 | return true; |
| 79 | |
| 80 | if (array_type(result, begin, end)) |
| 81 | return true; |
| 82 | |
| 83 | return false; |
| 84 | } |
| 85 | |
| 86 | |
| 87 | bool array_type(string & result, |
| 88 | string::const_iterator & begin, string::const_iterator end) |
| 89 | { |
| 90 | if (begin == end || *begin != '[') |
| 91 | return false; |
| 92 | |
| 93 | ++begin; |
| 94 | if (field_type(result, begin, end)) { |
| 95 | result += "[]"; |
| 96 | return true; |
| 97 | } |
| 98 | |
| 99 | return false; |
| 100 | } |
| 101 | |
| 102 | |
| 103 | bool list_of_field_type(string & result, |
| 104 | string::const_iterator & begin, string::const_iterator end) |
| 105 | { |
| 106 | bool first = false; |
| 107 | while (begin != end) { |
| 108 | if (first) |
| 109 | result += ", "; |
| 110 | |
| 111 | if (!field_type(result, begin, end)) |
| 112 | return false; |
| 113 | |
| 114 | first = true; |
| 115 | } |
| 116 | |
| 117 | return true; |
| 118 | } |
| 119 | |
| 120 | |
| 121 | bool return_descriptor(string & result, |
| 122 | string::const_iterator & begin, string::const_iterator end) |
| 123 | { |
| 124 | if (begin == end) |
| 125 | return false; |
| 126 | if (*begin == 'V') { |
| 127 | ++begin; |
| 128 | result = "void " + result; |
| 129 | return true; |
| 130 | } |
| 131 | |
| 132 | string temp; |
| 133 | if (!field_type(temp, begin, end)) |
| 134 | return false; |
| 135 | result = temp + " " + result; |
| 136 | |
| 137 | return true; |
| 138 | } |
| 139 | |
| 140 | |
| 141 | bool method_descriptor(string & result, |
| 142 | string::const_iterator & begin, string::const_iterator end) |
| 143 | { |
| 144 | if (begin == end || *begin != '(') |
| 145 | return false; |
| 146 | ++begin; |
| 147 | string::const_iterator pos = find(begin, end, ')'); |
| 148 | if (pos == end) |
| 149 | return false; |
| 150 | |
| 151 | result += "("; |
| 152 | |
| 153 | if (!list_of_field_type(result, begin, pos)) |
| 154 | return false; |
| 155 | |
| 156 | if (begin == end || *begin != ')') |
| 157 | return false; |
| 158 | |
| 159 | ++begin; |
| 160 | |
| 161 | if (!return_descriptor(result, begin, end)) |
| 162 | return false; |
| 163 | |
| 164 | result += ')'; |
| 165 | |
| 166 | return true; |
| 167 | } |
| 168 | |
| 169 | |
| 170 | bool methode_name(string & result, |
| 171 | string::const_iterator & begin, string::const_iterator end) |
| 172 | { |
| 173 | if (begin == end) |
| 174 | return false; |
| 175 | |
| 176 | string::const_iterator pos = find(begin, end, '('); |
| 177 | if (pos == end) |
| 178 | return false; |
| 179 | |
| 180 | result += '.' + string(begin, pos); |
| 181 | begin = pos; |
| 182 | |
| 183 | return true; |
| 184 | } |
| 185 | |
| 186 | |
| 187 | bool object_type(string & result, |
| 188 | string::const_iterator & begin, string::const_iterator end) |
| 189 | { |
| 190 | if (begin == end || *begin != 'L') |
| 191 | return false; |
| 192 | string::const_iterator pos = find(begin, end, ';'); |
| 193 | if (pos == end) |
| 194 | return false; |
| 195 | |
| 196 | string temp = string(begin + 1, pos); |
| 197 | replace(temp.begin(), temp.end(), '/', '.'); |
| 198 | result += temp; |
| 199 | |
| 200 | begin = pos + 1; |
| 201 | |
| 202 | return true; |
| 203 | } |
| 204 | |
| 205 | |
| 206 | string demangle_symbol(string::const_iterator begin, |
| 207 | string::const_iterator end) |
| 208 | { |
| 209 | string result; |
| 210 | |
| 211 | if (!object_type(result, begin, end)) |
| 212 | return string(); |
| 213 | |
| 214 | if (!methode_name(result, begin, end)) |
| 215 | return string(); |
| 216 | |
| 217 | if (!method_descriptor(result, begin, end)) |
| 218 | return string(); |
| 219 | |
| 220 | if (begin != end) { |
| 221 | if (*begin == '~') { |
| 222 | // special case for disambiguated symbol. |
| 223 | result += string(begin, end); |
| 224 | } else { |
| 225 | return string(); |
| 226 | } |
| 227 | } |
| 228 | |
| 229 | return result; |
| 230 | } |
| 231 | |
| 232 | } // anonymous namespace |
| 233 | |
| 234 | |
| 235 | string const demangle_java_symbol(string const & name) |
| 236 | { |
| 237 | return demangle_symbol(name.begin(), name.end()); |
| 238 | } |