/* Demangler for GNU C++ - main program Copyright (C) 1989-2017 Free Software Foundation, Inc. Written by James Clark (jjc@jclark.uucp) Rewritten by Fred Fish (fnf@cygnus.com) for ARM and Lucid demangling Modified by Satish Pai (pai@apollo.hp.com) for HP demangling This file is part of GNU Binutils. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GCC; see the file COPYING. If not, write to the Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ #include "sysdep.h" #include "bfd.h" #include "libiberty.h" #include "demangle.h" #include "getopt.h" #include "safe-ctype.h" #include "bucomm.h" static int flags = DMGL_PARAMS | DMGL_ANSI | DMGL_VERBOSE; static int strip_underscore = TARGET_PREPENDS_UNDERSCORE; static const struct option long_options[] = { {"strip-underscore", no_argument, NULL, '_'}, {"format", required_argument, NULL, 's'}, {"help", no_argument, NULL, 'h'}, {"no-params", no_argument, NULL, 'p'}, {"no-strip-underscores", no_argument, NULL, 'n'}, {"no-verbose", no_argument, NULL, 'i'}, {"types", no_argument, NULL, 't'}, {"version", no_argument, NULL, 'v'}, {NULL, no_argument, NULL, 0} }; static void demangle_it (char *mangled_name) { char *result; unsigned int skip_first = 0; /* _ and $ are sometimes found at the start of function names in assembler sources in order to distinguish them from other names (eg register names). So skip them here. */ if (mangled_name[0] == '.' || mangled_name[0] == '$') ++skip_first; if (strip_underscore && mangled_name[skip_first] == '_') ++skip_first; result = cplus_demangle (mangled_name + skip_first, flags); if (result == NULL) printf ("%s", mangled_name); else { if (mangled_name[0] == '.') putchar ('.'); printf ("%s", result); free (result); } } static void print_demangler_list (FILE *stream) { const struct demangler_engine *demangler; fprintf (stream, "{%s", libiberty_demanglers->demangling_style_name); for (demangler = libiberty_demanglers + 1; demangler->demangling_style != unknown_demangling; ++demangler) fprintf (stream, ",%s", demangler->demangling_style_name); fprintf (stream, "}"); } ATTRIBUTE_NORETURN static void usage (FILE *stream, int status) { fprintf (stream, "\ Usage: %s [options] [mangled names]\n", program_name); fprintf (stream, "\ Options are:\n\ [-_|--strip-underscore] Ignore first leading underscore%s\n", TARGET_PREPENDS_UNDERSCORE ? " (default)" : ""); fprintf (stream, "\ [-n|--no-strip-underscore] Do not ignore a leading underscore%s\n", TARGET_PREPENDS_UNDERSCORE ? "" : " (default)"); fprintf (stream, "\ [-p|--no-params] Do not display function arguments\n\ [-i|--no-verbose] Do not show implementation details (if any)\n\ [-t|--types] Also attempt to demangle type encodings\n\ [-s|--format "); print_demangler_list (stream); fprintf (stream, "]\n"); fprintf (stream, "\ [@<file>] Read extra options from <file>\n\ [-h|--help] Display this information\n\ [-v|--version] Show the version information\n\ Demangled names are displayed to stdout.\n\ If a name cannot be demangled it is just echoed to stdout.\n\ If no names are provided on the command line, stdin is read.\n"); if (REPORT_BUGS_TO[0] && status == 0) fprintf (stream, _("Report bugs to %s.\n"), REPORT_BUGS_TO); exit (status); } /* Return the string of non-alnum characters that may occur as a valid symbol component, in the standard assembler symbol syntax. */ static const char * standard_symbol_characters (void) { return "_$."; } /* Return the string of non-alnum characters that may occur as a valid symbol name component in an HP object file. Note that, since HP's compiler generates object code straight from C++ source, without going through an assembler, its mangled identifiers can use all sorts of characters that no assembler would tolerate, so the alphabet this function creates is a little odd. Here are some sample mangled identifiers offered by HP: typeid*__XT24AddressIndExpClassMember_ [Vftptr]key:__dt__32OrdinaryCompareIndExpClassMemberFv __ct__Q2_9Elf64_Dyn18{unnamed.union.#1}Fv This still seems really weird to me, since nowhere else in this file is there anything to recognize curly brackets, parens, etc. I've talked with Srikanth <srikanth@cup.hp.com>, and he assures me this is right, but I still strongly suspect that there's a misunderstanding here. If we decide it's better for c++filt to use HP's assembler syntax to scrape identifiers out of its input, here's the definition of the symbol name syntax from the HP assembler manual: Symbols are composed of uppercase and lowercase letters, decimal digits, dollar symbol, period (.), ampersand (&), pound sign(#) and underscore (_). A symbol can begin with a letter, digit underscore or dollar sign. If a symbol begins with a digit, it must contain a non-digit character. So have fun. */ static const char * hp_symbol_characters (void) { return "_$.<>#,*&[]:(){}"; } extern int main (int, char **); int main (int argc, char **argv) { int c; const char *valid_symbols; enum demangling_styles style = auto_demangling; program_name = argv[0]; xmalloc_set_program_name (program_name); bfd_set_error_program_name (program_name); expandargv (&argc, &argv); while ((c = getopt_long (argc, argv, "_hinps:tv", long_options, (int *) 0)) != EOF) { switch (c) { case '?': usage (stderr, 1); break; case 'h': usage (stdout, 0); case 'n': strip_underscore = 0; break; case 'p': flags &= ~ DMGL_PARAMS; break; case 't': flags |= DMGL_TYPES; break; case 'i': flags &= ~ DMGL_VERBOSE; break; case 'v': print_version ("c++filt"); return 0; case '_': strip_underscore = 1; break; case 's': style = cplus_demangle_name_to_style (optarg); if (style == unknown_demangling) { fprintf (stderr, "%s: unknown demangling style `%s'\n", program_name, optarg); return 1; } cplus_demangle_set_style (style); break; } } if (optind < argc) { for ( ; optind < argc; optind++) { demangle_it (argv[optind]); putchar ('\n'); } return 0; } switch (current_demangling_style) { case gnu_demangling: case lucid_demangling: case arm_demangling: case java_demangling: case edg_demangling: case gnat_demangling: case gnu_v3_demangling: case dlang_demangling: case rust_demangling: case auto_demangling: valid_symbols = standard_symbol_characters (); break; case hp_demangling: valid_symbols = hp_symbol_characters (); break; default: /* Folks should explicitly indicate the appropriate alphabet for each demangling. Providing a default would allow the question to go unconsidered. */ fatal ("Internal error: no symbol alphabet for current style"); } for (;;) { static char mbuffer[32767]; unsigned i = 0; c = getchar (); /* Try to read a mangled name. */ while (c != EOF && (ISALNUM (c) || strchr (valid_symbols, c))) { if (i >= sizeof (mbuffer) - 1) break; mbuffer[i++] = c; c = getchar (); } if (i > 0) { mbuffer[i] = 0; demangle_it (mbuffer); } if (c == EOF) break; /* Echo the whitespace characters so that the output looks like the input, only with the mangled names demangled. */ putchar (c); if (c == '\n') fflush (stdout); } fflush (stdout); return 0; }