| 1 | /* Demangler for GNU C++ - main program |
| 2 | Copyright (C) 1989-2014 Free Software Foundation, Inc. |
| 3 | Written by James Clark (jjc@jclark.uucp) |
| 4 | Rewritten by Fred Fish (fnf@cygnus.com) for ARM and Lucid demangling |
| 5 | Modified by Satish Pai (pai@apollo.hp.com) for HP demangling |
| 6 | |
| 7 | This file is part of GNU Binutils. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 3 of the License, or (at |
| 12 | your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with GCC; see the file COPYING. If not, write to the Free |
| 21 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
| 22 | 02110-1301, USA. */ |
| 23 | |
| 24 | #include "sysdep.h" |
| 25 | #include "bfd.h" |
| 26 | #include "libiberty.h" |
| 27 | #include "demangle.h" |
| 28 | #include "getopt.h" |
| 29 | #include "safe-ctype.h" |
| 30 | #include "bucomm.h" |
| 31 | |
| 32 | static int flags = DMGL_PARAMS | DMGL_ANSI | DMGL_VERBOSE; |
| 33 | static int strip_underscore = TARGET_PREPENDS_UNDERSCORE; |
| 34 | |
| 35 | static const struct option long_options[] = |
| 36 | { |
| 37 | {"strip-underscore", no_argument, NULL, '_'}, |
| 38 | {"format", required_argument, NULL, 's'}, |
| 39 | {"help", no_argument, NULL, 'h'}, |
| 40 | {"no-params", no_argument, NULL, 'p'}, |
| 41 | {"no-strip-underscores", no_argument, NULL, 'n'}, |
| 42 | {"no-verbose", no_argument, NULL, 'i'}, |
| 43 | {"types", no_argument, NULL, 't'}, |
| 44 | {"version", no_argument, NULL, 'v'}, |
| 45 | {NULL, no_argument, NULL, 0} |
| 46 | }; |
| 47 | |
| 48 | static void |
| 49 | demangle_it (char *mangled_name) |
| 50 | { |
| 51 | char *result; |
| 52 | unsigned int skip_first = 0; |
| 53 | |
| 54 | /* _ and $ are sometimes found at the start of function names |
| 55 | in assembler sources in order to distinguish them from other |
| 56 | names (eg register names). So skip them here. */ |
| 57 | if (mangled_name[0] == '.' || mangled_name[0] == '$') |
| 58 | ++skip_first; |
| 59 | if (strip_underscore && mangled_name[skip_first] == '_') |
| 60 | ++skip_first; |
| 61 | |
| 62 | result = cplus_demangle (mangled_name + skip_first, flags); |
| 63 | |
| 64 | if (result == NULL) |
| 65 | printf ("%s", mangled_name); |
| 66 | else |
| 67 | { |
| 68 | if (mangled_name[0] == '.') |
| 69 | putchar ('.'); |
| 70 | printf ("%s", result); |
| 71 | free (result); |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | static void |
| 76 | print_demangler_list (FILE *stream) |
| 77 | { |
| 78 | const struct demangler_engine *demangler; |
| 79 | |
| 80 | fprintf (stream, "{%s", libiberty_demanglers->demangling_style_name); |
| 81 | |
| 82 | for (demangler = libiberty_demanglers + 1; |
| 83 | demangler->demangling_style != unknown_demangling; |
| 84 | ++demangler) |
| 85 | fprintf (stream, ",%s", demangler->demangling_style_name); |
| 86 | |
| 87 | fprintf (stream, "}"); |
| 88 | } |
| 89 | |
| 90 | static void |
| 91 | usage (FILE *stream, int status) |
| 92 | { |
| 93 | fprintf (stream, "\ |
| 94 | Usage: %s [options] [mangled names]\n", program_name); |
| 95 | fprintf (stream, "\ |
| 96 | Options are:\n\ |
| 97 | [-_|--strip-underscore] Ignore first leading underscore%s\n", |
| 98 | TARGET_PREPENDS_UNDERSCORE ? " (default)" : ""); |
| 99 | fprintf (stream, "\ |
| 100 | [-n|--no-strip-underscore] Do not ignore a leading underscore%s\n", |
| 101 | TARGET_PREPENDS_UNDERSCORE ? "" : " (default)"); |
| 102 | fprintf (stream, "\ |
| 103 | [-p|--no-params] Do not display function arguments\n\ |
| 104 | [-i|--no-verbose] Do not show implementation details (if any)\n\ |
| 105 | [-t|--types] Also attempt to demangle type encodings\n\ |
| 106 | [-s|--format "); |
| 107 | print_demangler_list (stream); |
| 108 | fprintf (stream, "]\n"); |
| 109 | |
| 110 | fprintf (stream, "\ |
| 111 | [@<file>] Read extra options from <file>\n\ |
| 112 | [-h|--help] Display this information\n\ |
| 113 | [-v|--version] Show the version information\n\ |
| 114 | Demangled names are displayed to stdout.\n\ |
| 115 | If a name cannot be demangled it is just echoed to stdout.\n\ |
| 116 | If no names are provided on the command line, stdin is read.\n"); |
| 117 | if (REPORT_BUGS_TO[0] && status == 0) |
| 118 | fprintf (stream, _("Report bugs to %s.\n"), REPORT_BUGS_TO); |
| 119 | exit (status); |
| 120 | } |
| 121 | |
| 122 | /* Return the string of non-alnum characters that may occur |
| 123 | as a valid symbol component, in the standard assembler symbol |
| 124 | syntax. */ |
| 125 | |
| 126 | static const char * |
| 127 | standard_symbol_characters (void) |
| 128 | { |
| 129 | return "_$."; |
| 130 | } |
| 131 | |
| 132 | /* Return the string of non-alnum characters that may occur |
| 133 | as a valid symbol name component in an HP object file. |
| 134 | |
| 135 | Note that, since HP's compiler generates object code straight from |
| 136 | C++ source, without going through an assembler, its mangled |
| 137 | identifiers can use all sorts of characters that no assembler would |
| 138 | tolerate, so the alphabet this function creates is a little odd. |
| 139 | Here are some sample mangled identifiers offered by HP: |
| 140 | |
| 141 | typeid*__XT24AddressIndExpClassMember_ |
| 142 | [Vftptr]key:__dt__32OrdinaryCompareIndExpClassMemberFv |
| 143 | __ct__Q2_9Elf64_Dyn18{unnamed.union.#1}Fv |
| 144 | |
| 145 | This still seems really weird to me, since nowhere else in this |
| 146 | file is there anything to recognize curly brackets, parens, etc. |
| 147 | I've talked with Srikanth <srikanth@cup.hp.com>, and he assures me |
| 148 | this is right, but I still strongly suspect that there's a |
| 149 | misunderstanding here. |
| 150 | |
| 151 | If we decide it's better for c++filt to use HP's assembler syntax |
| 152 | to scrape identifiers out of its input, here's the definition of |
| 153 | the symbol name syntax from the HP assembler manual: |
| 154 | |
| 155 | Symbols are composed of uppercase and lowercase letters, decimal |
| 156 | digits, dollar symbol, period (.), ampersand (&), pound sign(#) and |
| 157 | underscore (_). A symbol can begin with a letter, digit underscore or |
| 158 | dollar sign. If a symbol begins with a digit, it must contain a |
| 159 | non-digit character. |
| 160 | |
| 161 | So have fun. */ |
| 162 | static const char * |
| 163 | hp_symbol_characters (void) |
| 164 | { |
| 165 | return "_$.<>#,*&[]:(){}"; |
| 166 | } |
| 167 | |
| 168 | extern int main (int, char **); |
| 169 | |
| 170 | int |
| 171 | main (int argc, char **argv) |
| 172 | { |
| 173 | int c; |
| 174 | const char *valid_symbols; |
| 175 | enum demangling_styles style = auto_demangling; |
| 176 | |
| 177 | program_name = argv[0]; |
| 178 | xmalloc_set_program_name (program_name); |
| 179 | |
| 180 | expandargv (&argc, &argv); |
| 181 | |
| 182 | while ((c = getopt_long (argc, argv, "_hinps:tv", long_options, (int *) 0)) != EOF) |
| 183 | { |
| 184 | switch (c) |
| 185 | { |
| 186 | case '?': |
| 187 | usage (stderr, 1); |
| 188 | break; |
| 189 | case 'h': |
| 190 | usage (stdout, 0); |
| 191 | case 'n': |
| 192 | strip_underscore = 0; |
| 193 | break; |
| 194 | case 'p': |
| 195 | flags &= ~ DMGL_PARAMS; |
| 196 | break; |
| 197 | case 't': |
| 198 | flags |= DMGL_TYPES; |
| 199 | break; |
| 200 | case 'i': |
| 201 | flags &= ~ DMGL_VERBOSE; |
| 202 | break; |
| 203 | case 'v': |
| 204 | print_version ("c++filt"); |
| 205 | return 0; |
| 206 | case '_': |
| 207 | strip_underscore = 1; |
| 208 | break; |
| 209 | case 's': |
| 210 | style = cplus_demangle_name_to_style (optarg); |
| 211 | if (style == unknown_demangling) |
| 212 | { |
| 213 | fprintf (stderr, "%s: unknown demangling style `%s'\n", |
| 214 | program_name, optarg); |
| 215 | return 1; |
| 216 | } |
| 217 | cplus_demangle_set_style (style); |
| 218 | break; |
| 219 | } |
| 220 | } |
| 221 | |
| 222 | if (optind < argc) |
| 223 | { |
| 224 | for ( ; optind < argc; optind++) |
| 225 | { |
| 226 | demangle_it (argv[optind]); |
| 227 | putchar ('\n'); |
| 228 | } |
| 229 | |
| 230 | return 0; |
| 231 | } |
| 232 | |
| 233 | switch (current_demangling_style) |
| 234 | { |
| 235 | case gnu_demangling: |
| 236 | case lucid_demangling: |
| 237 | case arm_demangling: |
| 238 | case java_demangling: |
| 239 | case edg_demangling: |
| 240 | case gnat_demangling: |
| 241 | case gnu_v3_demangling: |
| 242 | case auto_demangling: |
| 243 | valid_symbols = standard_symbol_characters (); |
| 244 | break; |
| 245 | case hp_demangling: |
| 246 | valid_symbols = hp_symbol_characters (); |
| 247 | break; |
| 248 | default: |
| 249 | /* Folks should explicitly indicate the appropriate alphabet for |
| 250 | each demangling. Providing a default would allow the |
| 251 | question to go unconsidered. */ |
| 252 | fatal ("Internal error: no symbol alphabet for current style"); |
| 253 | } |
| 254 | |
| 255 | for (;;) |
| 256 | { |
| 257 | static char mbuffer[32767]; |
| 258 | unsigned i = 0; |
| 259 | |
| 260 | c = getchar (); |
| 261 | /* Try to read a mangled name. */ |
| 262 | while (c != EOF && (ISALNUM (c) || strchr (valid_symbols, c))) |
| 263 | { |
| 264 | if (i >= sizeof (mbuffer) - 1) |
| 265 | break; |
| 266 | mbuffer[i++] = c; |
| 267 | c = getchar (); |
| 268 | } |
| 269 | |
| 270 | if (i > 0) |
| 271 | { |
| 272 | mbuffer[i] = 0; |
| 273 | demangle_it (mbuffer); |
| 274 | } |
| 275 | |
| 276 | if (c == EOF) |
| 277 | break; |
| 278 | |
| 279 | /* Echo the whitespace characters so that the output looks |
| 280 | like the input, only with the mangled names demangled. */ |
| 281 | putchar (c); |
| 282 | if (c == '\n') |
| 283 | fflush (stdout); |
| 284 | } |
| 285 | |
| 286 | fflush (stdout); |
| 287 | return 0; |
| 288 | } |