1 /* Demangler for GNU C++ - main program
2 Copyright (C) 1989-2017 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
7 This file is part of GNU Binutils.
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.
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.
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
26 #include "libiberty.h"
29 #include "safe-ctype.h"
32 static int flags = DMGL_PARAMS | DMGL_ANSI | DMGL_VERBOSE;
33 static int strip_underscore = TARGET_PREPENDS_UNDERSCORE;
35 static const struct option long_options[] =
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}
49 demangle_it (char *mangled_name)
52 unsigned int skip_first = 0;
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] == '$')
59 if (strip_underscore && mangled_name[skip_first] == '_')
62 result = cplus_demangle (mangled_name + skip_first, flags);
65 printf ("%s", mangled_name);
68 if (mangled_name[0] == '.')
70 printf ("%s", result);
76 print_demangler_list (FILE *stream)
78 const struct demangler_engine *demangler;
80 fprintf (stream, "{%s", libiberty_demanglers->demangling_style_name);
82 for (demangler = libiberty_demanglers + 1;
83 demangler->demangling_style != unknown_demangling;
85 fprintf (stream, ",%s", demangler->demangling_style_name);
87 fprintf (stream, "}");
90 ATTRIBUTE_NORETURN static void
91 usage (FILE *stream, int status)
94 Usage: %s [options] [mangled names]\n", program_name);
97 [-_|--strip-underscore] Ignore first leading underscore%s\n",
98 TARGET_PREPENDS_UNDERSCORE ? " (default)" : "");
100 [-n|--no-strip-underscore] Do not ignore a leading underscore%s\n",
101 TARGET_PREPENDS_UNDERSCORE ? "" : " (default)");
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\
107 print_demangler_list (stream);
108 fprintf (stream, "]\n");
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);
122 /* Return the string of non-alnum characters that may occur
123 as a valid symbol component, in the standard assembler symbol
127 standard_symbol_characters (void)
132 /* Return the string of non-alnum characters that may occur
133 as a valid symbol name component in an HP object file.
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:
141 typeid*__XT24AddressIndExpClassMember_
142 [Vftptr]key:__dt__32OrdinaryCompareIndExpClassMemberFv
143 __ct__Q2_9Elf64_Dyn18{unnamed.union.#1}Fv
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.
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:
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
163 hp_symbol_characters (void)
165 return "_$.<>#,*&[]:(){}";
168 extern int main (int, char **);
171 main (int argc, char **argv)
174 const char *valid_symbols;
175 enum demangling_styles style = auto_demangling;
177 program_name = argv[0];
178 xmalloc_set_program_name (program_name);
179 bfd_set_error_program_name (program_name);
181 expandargv (&argc, &argv);
183 while ((c = getopt_long (argc, argv, "_hinps:tv", long_options, (int *) 0)) != EOF)
193 strip_underscore = 0;
196 flags &= ~ DMGL_PARAMS;
202 flags &= ~ DMGL_VERBOSE;
205 print_version ("c++filt");
208 strip_underscore = 1;
211 style = cplus_demangle_name_to_style (optarg);
212 if (style == unknown_demangling)
214 fprintf (stderr, "%s: unknown demangling style `%s'\n",
215 program_name, optarg);
218 cplus_demangle_set_style (style);
225 for ( ; optind < argc; optind++)
227 demangle_it (argv[optind]);
234 switch (current_demangling_style)
237 case lucid_demangling:
239 case java_demangling:
241 case gnat_demangling:
242 case gnu_v3_demangling:
243 case dlang_demangling:
244 case rust_demangling:
245 case auto_demangling:
246 valid_symbols = standard_symbol_characters ();
249 valid_symbols = hp_symbol_characters ();
252 /* Folks should explicitly indicate the appropriate alphabet for
253 each demangling. Providing a default would allow the
254 question to go unconsidered. */
255 fatal ("Internal error: no symbol alphabet for current style");
260 static char mbuffer[32767];
264 /* Try to read a mangled name. */
265 while (c != EOF && (ISALNUM (c) || strchr (valid_symbols, c)))
267 if (i >= sizeof (mbuffer) - 1)
276 demangle_it (mbuffer);
282 /* Echo the whitespace characters so that the output looks
283 like the input, only with the mangled names demangled. */