1 /* Demangler for GNU C++ - main program 2 Copyright 1989, 1991, 1994, 1995, 1996, 1997, 1998, 1999, 3 2000, 2001, 2002, 2003, 2005, 2007 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 GNU Binutils. 9 10 This program is free software; you can redistribute it and/or modify 11 it under the terms of the GNU General Public License as published by 12 the Free Software Foundation; either version 3 of the License, or (at 13 your option) any later version. 14 15 This program is distributed in the hope that it will be useful, 16 but WITHOUT ANY WARRANTY; without even the implied warranty of 17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 GNU General Public License 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 "sysdep.h" 26 #include "bfd.h" 27 #include "libiberty.h" 28 #include "demangle.h" 29 #include "getopt.h" 30 #include "safe-ctype.h" 31 #include "bucomm.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 ("%s", mangled_name); 67 else 68 { 69 if (mangled_name[0] == '.') 70 putchar ('.'); 71 printf ("%s", 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 if (REPORT_BUGS_TO[0] && status == 0) 119 fprintf (stream, _("Report bugs to %s.\n"), REPORT_BUGS_TO); 120 exit (status); 121 } 122 123 /* Return the string of non-alnum characters that may occur 124 as a valid symbol component, in the standard assembler symbol 125 syntax. */ 126 127 static const char * 128 standard_symbol_characters (void) 129 { 130 return "_$."; 131 } 132 133 /* Return the string of non-alnum characters that may occur 134 as a valid symbol name component in an HP object file. 135 136 Note that, since HP's compiler generates object code straight from 137 C++ source, without going through an assembler, its mangled 138 identifiers can use all sorts of characters that no assembler would 139 tolerate, so the alphabet this function creates is a little odd. 140 Here are some sample mangled identifiers offered by HP: 141 142 typeid*__XT24AddressIndExpClassMember_ 143 [Vftptr]key:__dt__32OrdinaryCompareIndExpClassMemberFv 144 __ct__Q2_9Elf64_Dyn18{unnamed.union.#1}Fv 145 146 This still seems really weird to me, since nowhere else in this 147 file is there anything to recognize curly brackets, parens, etc. 148 I've talked with Srikanth <srikanth@cup.hp.com>, and he assures me 149 this is right, but I still strongly suspect that there's a 150 misunderstanding here. 151 152 If we decide it's better for c++filt to use HP's assembler syntax 153 to scrape identifiers out of its input, here's the definition of 154 the symbol name syntax from the HP assembler manual: 155 156 Symbols are composed of uppercase and lowercase letters, decimal 157 digits, dollar symbol, period (.), ampersand (&), pound sign(#) and 158 underscore (_). A symbol can begin with a letter, digit underscore or 159 dollar sign. If a symbol begins with a digit, it must contain a 160 non-digit character. 161 162 So have fun. */ 163 static const char * 164 hp_symbol_characters (void) 165 { 166 return "_$.<>#,*&[]:(){}"; 167 } 168 169 extern int main (int, char **); 170 171 int 172 main (int argc, char **argv) 173 { 174 int c; 175 const char *valid_symbols; 176 enum demangling_styles style = auto_demangling; 177 178 program_name = argv[0]; 179 xmalloc_set_program_name (program_name); 180 181 expandargv (&argc, &argv); 182 183 while ((c = getopt_long (argc, argv, "_hinps:tv", long_options, (int *) 0)) != EOF) 184 { 185 switch (c) 186 { 187 case '?': 188 usage (stderr, 1); 189 break; 190 case 'h': 191 usage (stdout, 0); 192 case 'n': 193 strip_underscore = 0; 194 break; 195 case 'p': 196 flags &= ~ DMGL_PARAMS; 197 break; 198 case 't': 199 flags |= DMGL_TYPES; 200 break; 201 case 'i': 202 flags &= ~ DMGL_VERBOSE; 203 break; 204 case 'v': 205 print_version ("c++filt"); 206 return 0; 207 case '_': 208 strip_underscore = 1; 209 break; 210 case 's': 211 style = cplus_demangle_name_to_style (optarg); 212 if (style == unknown_demangling) 213 { 214 fprintf (stderr, "%s: unknown demangling style `%s'\n", 215 program_name, optarg); 216 return 1; 217 } 218 cplus_demangle_set_style (style); 219 break; 220 } 221 } 222 223 if (optind < argc) 224 { 225 for ( ; optind < argc; optind++) 226 { 227 demangle_it (argv[optind]); 228 putchar ('\n'); 229 } 230 231 return 0; 232 } 233 234 switch (current_demangling_style) 235 { 236 case gnu_demangling: 237 case lucid_demangling: 238 case arm_demangling: 239 case java_demangling: 240 case edg_demangling: 241 case gnat_demangling: 242 case gnu_v3_demangling: 243 case auto_demangling: 244 valid_symbols = standard_symbol_characters (); 245 break; 246 case hp_demangling: 247 valid_symbols = hp_symbol_characters (); 248 break; 249 default: 250 /* Folks should explicitly indicate the appropriate alphabet for 251 each demangling. Providing a default would allow the 252 question to go unconsidered. */ 253 fatal ("Internal error: no symbol alphabet for current style"); 254 } 255 256 for (;;) 257 { 258 static char mbuffer[32767]; 259 unsigned i = 0; 260 261 c = getchar (); 262 /* Try to read a mangled name. */ 263 while (c != EOF && (ISALNUM (c) || strchr (valid_symbols, c))) 264 { 265 if (i >= sizeof (mbuffer) - 1) 266 break; 267 mbuffer[i++] = c; 268 c = getchar (); 269 } 270 271 if (i > 0) 272 { 273 mbuffer[i] = 0; 274 demangle_it (mbuffer); 275 } 276 277 if (c == EOF) 278 break; 279 280 /* Echo the whitespace characters so that the output looks 281 like the input, only with the mangled names demangled. */ 282 putchar (c); 283 if (c == '\n') 284 fflush (stdout); 285 } 286 287 fflush (stdout); 288 return 0; 289 } 290