290 lines
7.2 KiB
C
290 lines
7.2 KiB
C
/* Demangler for GNU C++ - main program
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Copyright 1989, 1991, 1994, 1995, 1996, 1997, 1998, 1999,
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2000, 2001, 2002, 2003 Free Software Foundation, Inc.
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Written by James Clark (jjc@jclark.uucp)
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Rewritten by Fred Fish (fnf@cygnus.com) for ARM and Lucid demangling
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Modified by Satish Pai (pai@apollo.hp.com) for HP demangling
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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#include "config.h"
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#include "bfd.h"
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#include "bucomm.h"
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#include "libiberty.h"
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#include "demangle.h"
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#include "getopt.h"
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#include "safe-ctype.h"
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static int flags = DMGL_PARAMS | DMGL_ANSI | DMGL_VERBOSE;
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static void demangle_it (char *);
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static void usage (FILE *, int) ATTRIBUTE_NORETURN;
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static void print_demangler_list (FILE *);
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static void
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demangle_it (char *mangled_name)
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{
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char *result;
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/* For command line args, also try to demangle type encodings. */
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result = cplus_demangle (mangled_name, flags | DMGL_TYPES);
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if (result == NULL)
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{
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printf ("%s\n", mangled_name);
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}
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else
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{
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printf ("%s\n", result);
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free (result);
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}
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}
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static void
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print_demangler_list (FILE *stream)
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{
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const struct demangler_engine *demangler;
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fprintf (stream, "{%s", libiberty_demanglers->demangling_style_name);
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for (demangler = libiberty_demanglers + 1;
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demangler->demangling_style != unknown_demangling;
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++demangler)
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fprintf (stream, ",%s", demangler->demangling_style_name);
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fprintf (stream, "}");
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}
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static void
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usage (FILE *stream, int status)
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{
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fprintf (stream, "\
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Usage: %s [-_] [-n] [--strip-underscores] [--no-strip-underscores] \n",
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program_name);
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fprintf (stream, "\
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[-s ");
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print_demangler_list (stream);
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fprintf (stream, "]\n");
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fprintf (stream, "\
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[--format ");
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print_demangler_list (stream);
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fprintf (stream, "]\n");
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fprintf (stream, "\
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[--help] [--version] [arg...]\n");
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exit (status);
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}
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#define MBUF_SIZE 32767
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char mbuffer[MBUF_SIZE];
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int strip_underscore = 0;
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static const struct option long_options[] = {
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{"strip-underscores", no_argument, 0, '_'},
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{"format", required_argument, 0, 's'},
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{"help", no_argument, 0, 'h'},
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{"no-params", no_argument, 0, 'p'},
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{"no-strip-underscores", no_argument, 0, 'n'},
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{"version", no_argument, 0, 'v'},
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{0, no_argument, 0, 0}
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};
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static const char *standard_symbol_characters (void);
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static const char *hp_symbol_characters (void);
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/* Return the string of non-alnum characters that may occur
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as a valid symbol component, in the standard assembler symbol
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syntax. */
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static const char *
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standard_symbol_characters (void)
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{
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return "_$.";
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}
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/* Return the string of non-alnum characters that may occur
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as a valid symbol name component in an HP object file.
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Note that, since HP's compiler generates object code straight from
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C++ source, without going through an assembler, its mangled
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identifiers can use all sorts of characters that no assembler would
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tolerate, so the alphabet this function creates is a little odd.
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Here are some sample mangled identifiers offered by HP:
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typeid*__XT24AddressIndExpClassMember_
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[Vftptr]key:__dt__32OrdinaryCompareIndExpClassMemberFv
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__ct__Q2_9Elf64_Dyn18{unnamed.union.#1}Fv
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This still seems really weird to me, since nowhere else in this
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file is there anything to recognize curly brackets, parens, etc.
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I've talked with Srikanth <srikanth@cup.hp.com>, and he assures me
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this is right, but I still strongly suspect that there's a
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misunderstanding here.
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If we decide it's better for c++filt to use HP's assembler syntax
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to scrape identifiers out of its input, here's the definition of
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the symbol name syntax from the HP assembler manual:
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Symbols are composed of uppercase and lowercase letters, decimal
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digits, dollar symbol, period (.), ampersand (&), pound sign(#) and
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underscore (_). A symbol can begin with a letter, digit underscore or
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dollar sign. If a symbol begins with a digit, it must contain a
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non-digit character.
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So have fun. */
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static const char *
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hp_symbol_characters (void)
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{
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return "_$.<>#,*&[]:(){}";
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}
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extern int main (int, char **);
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int
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main (int argc, char **argv)
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{
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char *result;
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int c;
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const char *valid_symbols;
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enum demangling_styles style = auto_demangling;
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program_name = argv[0];
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xmalloc_set_program_name (program_name);
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strip_underscore = TARGET_PREPENDS_UNDERSCORE;
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while ((c = getopt_long (argc, argv, "_nps:", long_options, (int *) 0)) != EOF)
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{
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switch (c)
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{
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case '?':
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usage (stderr, 1);
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break;
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case 'h':
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usage (stdout, 0);
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case 'n':
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strip_underscore = 0;
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break;
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case 'p':
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flags &= ~ DMGL_PARAMS;
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break;
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case 'v':
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print_version ("c++filt");
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return (0);
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case '_':
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strip_underscore = 1;
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break;
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case 's':
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{
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style = cplus_demangle_name_to_style (optarg);
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if (style == unknown_demangling)
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{
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fprintf (stderr, "%s: unknown demangling style `%s'\n",
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program_name, optarg);
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return (1);
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}
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else
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cplus_demangle_set_style (style);
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}
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break;
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}
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}
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if (optind < argc)
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{
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for ( ; optind < argc; optind++)
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{
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demangle_it (argv[optind]);
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}
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}
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else
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{
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switch (current_demangling_style)
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{
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case gnu_demangling:
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case lucid_demangling:
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case arm_demangling:
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case java_demangling:
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case edg_demangling:
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case gnat_demangling:
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case gnu_v3_demangling:
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case auto_demangling:
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valid_symbols = standard_symbol_characters ();
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break;
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case hp_demangling:
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valid_symbols = hp_symbol_characters ();
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break;
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default:
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/* Folks should explicitly indicate the appropriate alphabet for
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each demangling. Providing a default would allow the
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question to go unconsidered. */
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fatal ("Internal error: no symbol alphabet for current style");
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}
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for (;;)
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{
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int i = 0;
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c = getchar ();
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/* Try to read a label. */
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while (c != EOF && (ISALNUM (c) || strchr (valid_symbols, c)))
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{
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if (i >= MBUF_SIZE-1)
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break;
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mbuffer[i++] = c;
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c = getchar ();
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}
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if (i > 0)
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{
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int skip_first = 0;
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mbuffer[i] = 0;
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if (mbuffer[0] == '.' || mbuffer[0] == '$')
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++skip_first;
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if (strip_underscore && mbuffer[skip_first] == '_')
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++skip_first;
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if (skip_first > i)
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skip_first = i;
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flags |= (int) style;
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result = cplus_demangle (mbuffer + skip_first, flags);
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if (result)
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{
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if (mbuffer[0] == '.')
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putc ('.', stdout);
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fputs (result, stdout);
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free (result);
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}
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else
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fputs (mbuffer, stdout);
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fflush (stdout);
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}
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if (c == EOF)
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break;
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putchar (c);
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fflush (stdout);
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}
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}
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return (0);
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}
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