1 /* Demangler for GNU C++ - main program 2 Copyright 1989, 1991, 1994, 1995, 1996, 1997, 1998, 1999, 3 2000, 2001, 2002, 2003, 2005 Free Software Foundation, Inc. 4 Written by James Clark (jjc@jclark.uucp) 5 Rewritten by Fred Fish (fnf@cygnus.com) for ARM and Lucid demangling 6 Modified by Satish Pai (pai@apollo.hp.com) for HP demangling 7 8 This file is part of GCC. 9 10 GCC is free software; you can redistribute it and/or modify it under 11 the terms of the GNU General Public License as published by the Free 12 Software Foundation; either version 2, or (at your option) any later 13 version. 14 15 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 16 WARRANTY; without even the implied warranty of MERCHANTABILITY or 17 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 18 for more details. 19 20 You should have received a copy of the GNU General Public License 21 along with GCC; see the file COPYING. If not, write to the Free 22 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 23 02110-1301, USA. */ 24 25 #include "config.h" 26 #include "bfd.h" 27 #include "bucomm.h" 28 #include "libiberty.h" 29 #include "demangle.h" 30 #include "getopt.h" 31 #include "safe-ctype.h" 32 33 static int flags = DMGL_PARAMS | DMGL_ANSI | DMGL_VERBOSE; 34 static int strip_underscore = TARGET_PREPENDS_UNDERSCORE; 35 36 static const struct option long_options[] = 37 { 38 {"strip-underscore", no_argument, NULL, '_'}, 39 {"format", required_argument, NULL, 's'}, 40 {"help", no_argument, NULL, 'h'}, 41 {"no-params", no_argument, NULL, 'p'}, 42 {"no-strip-underscores", no_argument, NULL, 'n'}, 43 {"no-verbose", no_argument, NULL, 'i'}, 44 {"types", no_argument, NULL, 't'}, 45 {"version", no_argument, NULL, 'v'}, 46 {NULL, no_argument, NULL, 0} 47 }; 48 49 static void 50 demangle_it (char *mangled_name) 51 { 52 char *result; 53 unsigned int skip_first = 0; 54 55 /* _ and $ are sometimes found at the start of function names 56 in assembler sources in order to distinguish them from other 57 names (eg register names). So skip them here. */ 58 if (mangled_name[0] == '.' || mangled_name[0] == '$') 59 ++skip_first; 60 if (strip_underscore && mangled_name[skip_first] == '_') 61 ++skip_first; 62 63 result = cplus_demangle (mangled_name + skip_first, flags); 64 65 if (result == NULL) 66 printf (mangled_name); 67 else 68 { 69 if (mangled_name[0] == '.') 70 putchar ('.'); 71 printf (result); 72 free (result); 73 } 74 } 75 76 static void 77 print_demangler_list (FILE *stream) 78 { 79 const struct demangler_engine *demangler; 80 81 fprintf (stream, "{%s", libiberty_demanglers->demangling_style_name); 82 83 for (demangler = libiberty_demanglers + 1; 84 demangler->demangling_style != unknown_demangling; 85 ++demangler) 86 fprintf (stream, ",%s", demangler->demangling_style_name); 87 88 fprintf (stream, "}"); 89 } 90 91 static void 92 usage (FILE *stream, int status) 93 { 94 fprintf (stream, "\ 95 Usage: %s [options] [mangled names]\n", program_name); 96 fprintf (stream, "\ 97 Options are:\n\ 98 [-_|--strip-underscore] Ignore first leading underscore%s\n", 99 TARGET_PREPENDS_UNDERSCORE ? " (default)" : ""); 100 fprintf (stream, "\ 101 [-n|--no-strip-underscore] Do not ignore a leading underscore%s\n", 102 TARGET_PREPENDS_UNDERSCORE ? "" : " (default)"); 103 fprintf (stream, "\ 104 [-p|--no-params] Do not display function arguments\n\ 105 [-i|--no-verbose] Do not show implementation details (if any)\n\ 106 [-t|--types] Also attempt to demangle type encodings\n\ 107 [-s|--format "); 108 print_demangler_list (stream); 109 fprintf (stream, "]\n"); 110 111 fprintf (stream, "\ 112 [@<file>] Read extra options from <file>\n\ 113 [-h|--help] Display this information\n\ 114 [-v|--version] Show the version information\n\ 115 Demangled names are displayed to stdout.\n\ 116 If a name cannot be demangled it is just echoed to stdout.\n\ 117 If no names are provided on the command line, stdin is read.\n"); 118 exit (status); 119 } 120 121 /* Return the string of non-alnum characters that may occur 122 as a valid symbol component, in the standard assembler symbol 123 syntax. */ 124 125 static const char * 126 standard_symbol_characters (void) 127 { 128 return "_$."; 129 } 130 131 /* Return the string of non-alnum characters that may occur 132 as a valid symbol name component in an HP object file. 133 134 Note that, since HP's compiler generates object code straight from 135 C++ source, without going through an assembler, its mangled 136 identifiers can use all sorts of characters that no assembler would 137 tolerate, so the alphabet this function creates is a little odd. 138 Here are some sample mangled identifiers offered by HP: 139 140 typeid*__XT24AddressIndExpClassMember_ 141 [Vftptr]key:__dt__32OrdinaryCompareIndExpClassMemberFv 142 __ct__Q2_9Elf64_Dyn18{unnamed.union.#1}Fv 143 144 This still seems really weird to me, since nowhere else in this 145 file is there anything to recognize curly brackets, parens, etc. 146 I've talked with Srikanth <srikanth@cup.hp.com>, and he assures me 147 this is right, but I still strongly suspect that there's a 148 misunderstanding here. 149 150 If we decide it's better for c++filt to use HP's assembler syntax 151 to scrape identifiers out of its input, here's the definition of 152 the symbol name syntax from the HP assembler manual: 153 154 Symbols are composed of uppercase and lowercase letters, decimal 155 digits, dollar symbol, period (.), ampersand (&), pound sign(#) and 156 underscore (_). A symbol can begin with a letter, digit underscore or 157 dollar sign. If a symbol begins with a digit, it must contain a 158 non-digit character. 159 160 So have fun. */ 161 static const char * 162 hp_symbol_characters (void) 163 { 164 return "_$.<>#,*&[]:(){}"; 165 } 166 167 extern int main (int, char **); 168 169 int 170 main (int argc, char **argv) 171 { 172 int c; 173 const char *valid_symbols; 174 enum demangling_styles style = auto_demangling; 175 176 program_name = argv[0]; 177 xmalloc_set_program_name (program_name); 178 179 expandargv (&argc, &argv); 180 181 while ((c = getopt_long (argc, argv, "_hinps:tv", long_options, (int *) 0)) != EOF) 182 { 183 switch (c) 184 { 185 case '?': 186 usage (stderr, 1); 187 break; 188 case 'h': 189 usage (stdout, 0); 190 case 'n': 191 strip_underscore = 0; 192 break; 193 case 'p': 194 flags &= ~ DMGL_PARAMS; 195 break; 196 case 't': 197 flags |= DMGL_TYPES; 198 break; 199 case 'i': 200 flags &= ~ DMGL_VERBOSE; 201 break; 202 case 'v': 203 print_version ("c++filt"); 204 return 0; 205 case '_': 206 strip_underscore = 1; 207 break; 208 case 's': 209 style = cplus_demangle_name_to_style (optarg); 210 if (style == unknown_demangling) 211 { 212 fprintf (stderr, "%s: unknown demangling style `%s'\n", 213 program_name, optarg); 214 return 1; 215 } 216 cplus_demangle_set_style (style); 217 break; 218 } 219 } 220 221 if (optind < argc) 222 { 223 for ( ; optind < argc; optind++) 224 { 225 demangle_it (argv[optind]); 226 putchar ('\n'); 227 } 228 229 return 0; 230 } 231 232 switch (current_demangling_style) 233 { 234 case gnu_demangling: 235 case lucid_demangling: 236 case arm_demangling: 237 case java_demangling: 238 case edg_demangling: 239 case gnat_demangling: 240 case gnu_v3_demangling: 241 case auto_demangling: 242 valid_symbols = standard_symbol_characters (); 243 break; 244 case hp_demangling: 245 valid_symbols = hp_symbol_characters (); 246 break; 247 default: 248 /* Folks should explicitly indicate the appropriate alphabet for 249 each demangling. Providing a default would allow the 250 question to go unconsidered. */ 251 fatal ("Internal error: no symbol alphabet for current style"); 252 } 253 254 for (;;) 255 { 256 static char mbuffer[32767]; 257 unsigned i = 0; 258 259 c = getchar (); 260 /* Try to read a mangled name. */ 261 while (c != EOF && (ISALNUM (c) || strchr (valid_symbols, c))) 262 { 263 if (i >= sizeof (mbuffer) - 1) 264 break; 265 mbuffer[i++] = c; 266 c = getchar (); 267 } 268 269 if (i > 0) 270 { 271 mbuffer[i] = 0; 272 demangle_it (mbuffer); 273 } 274 275 if (c == EOF) 276 break; 277 278 /* Echo the whitespace characters so that the output looks 279 like the input, only with the mangled names demangled. */ 280 putchar (c); 281 if (c == '\n') 282 fflush (stdout); 283 } 284 285 fflush (stdout); 286 return 0; 287 } 288