binutils-gdb/binutils/cxxfilt.c

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/* Demangler for GNU C++ - main program
Copyright (C) 1989-2019 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
2007-07-05 18:54:46 +02:00
This file is part of GNU Binutils.
2007-07-05 18:54:46 +02:00
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.
2007-07-05 18:54:46 +02:00
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'},
Synchronize libiberty with gcc and add --no-recruse-limit option to tools that support name demangling. This patch addresses the multitude of bug reports about resource exhaustion in libiberty's name demangling code. It adds a limit to the amount of recursion that is allowed, before an error is triggered. It also adds a new demangling option to disable this limit. (The limit is enabled by default). PR 87681 PR 87675 PR 87636 PR 87335 libiberty * cp-demangle.h (struct d_info): Add recursion_limit field. * cp-demangle.c (d_function_type): If the recursion limit is enabled and reached, return with a failure result. (d_demangle_callback): If the recursion limit is enabled, check for a mangled string that is so long that there is not enough stack space for the local arrays. * cplus-dem.c (struct work): Add recursion_level field. (demangle_nested_args): If the recursion limit is enabled and reached, return with a failure result. include * demangle.h (DMGL_RECURSE_LIMIT): Define. (DEMANGLE_RECURSION_LIMIT): Prototype. binutuils * addr2line.c (demangle_flags): New static variable. (long_options): Add --recurse-limit and --no-recurse-limit. (translate_address): Pass demangle_flags to bfd_demangle. (main): Handle --recurse-limit and --no-recurse-limit options. * cxxfilt.c (flags): Add DMGL_RECURSE_LIMIT. (long_options): Add --recurse-limit and --no-recurse-limit. (main): Handle new options. * dlltool.c (gen_def_file): Include DMGL_RECURSE_LIMIT in flags passed to cplus_demangle. * nm.c (demangle_flags): New static variable. (long_options): Add --recurse-limit and --no-recurse-limit. (main): Handle new options. * objdump.c (demangle_flags): New static variable. (usage): Add --recurse-limit and --no-recurse-limit. (long_options): Likewise. (objdump_print_symname): Pass demangle_flags to bfd_demangle. (disassemble_section): Likewise. (dump_dymbols): Likewise. (main): Handle new options. * prdbg.c (demangle_flags): New static variable. (tg_variable): Pass demangle_flags to demangler. (tg_start_function): Likewise. * stabs.c (demangle_flags): New static variable. (stab_demangle_template): Pass demangle_flags to demangler. (stab_demangle_v3_argtypes): Likewise. (stab_demangle_v3_arg): Likewise. * doc/binutuls.texi: Document new command line options. * NEWS: Mention the new feature. * testsuite/config/default.exp (CXXFILT): Define if not already defined. (CXXFILTFLAGS): Likewise. * testsuite/binutils-all/cxxfilt.exp: New file. Runs a few simple tests of the cxxfilt program.
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{"recurse-limit", no_argument, NULL, 'R'},
{"recursion-limit", no_argument, NULL, 'R'},
{"no-recurse-limit", no_argument, NULL, 'r'},
{"no-recursion-limit", no_argument, NULL, 'r'},
{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\
Synchronize libiberty with gcc and add --no-recruse-limit option to tools that support name demangling. This patch addresses the multitude of bug reports about resource exhaustion in libiberty's name demangling code. It adds a limit to the amount of recursion that is allowed, before an error is triggered. It also adds a new demangling option to disable this limit. (The limit is enabled by default). PR 87681 PR 87675 PR 87636 PR 87335 libiberty * cp-demangle.h (struct d_info): Add recursion_limit field. * cp-demangle.c (d_function_type): If the recursion limit is enabled and reached, return with a failure result. (d_demangle_callback): If the recursion limit is enabled, check for a mangled string that is so long that there is not enough stack space for the local arrays. * cplus-dem.c (struct work): Add recursion_level field. (demangle_nested_args): If the recursion limit is enabled and reached, return with a failure result. include * demangle.h (DMGL_RECURSE_LIMIT): Define. (DEMANGLE_RECURSION_LIMIT): Prototype. binutuils * addr2line.c (demangle_flags): New static variable. (long_options): Add --recurse-limit and --no-recurse-limit. (translate_address): Pass demangle_flags to bfd_demangle. (main): Handle --recurse-limit and --no-recurse-limit options. * cxxfilt.c (flags): Add DMGL_RECURSE_LIMIT. (long_options): Add --recurse-limit and --no-recurse-limit. (main): Handle new options. * dlltool.c (gen_def_file): Include DMGL_RECURSE_LIMIT in flags passed to cplus_demangle. * nm.c (demangle_flags): New static variable. (long_options): Add --recurse-limit and --no-recurse-limit. (main): Handle new options. * objdump.c (demangle_flags): New static variable. (usage): Add --recurse-limit and --no-recurse-limit. (long_options): Likewise. (objdump_print_symname): Pass demangle_flags to bfd_demangle. (disassemble_section): Likewise. (dump_dymbols): Likewise. (main): Handle new options. * prdbg.c (demangle_flags): New static variable. (tg_variable): Pass demangle_flags to demangler. (tg_start_function): Likewise. * stabs.c (demangle_flags): New static variable. (stab_demangle_template): Pass demangle_flags to demangler. (stab_demangle_v3_argtypes): Likewise. (stab_demangle_v3_arg): Likewise. * doc/binutuls.texi: Document new command line options. * NEWS: Mention the new feature. * testsuite/config/default.exp (CXXFILT): Define if not already defined. (CXXFILTFLAGS): Likewise. * testsuite/binutils-all/cxxfilt.exp: New file. Runs a few simple tests of the cxxfilt program.
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[-R|--recurse-limit] Enable a limit on recursion whilst demangling. [Default]\n\
]-r|--no-recurse-limit] Disable a limit on recursion whilst demangling\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");
top level: 2007-02-17 Mark Mitchell <mark@codesourcery.com> Nathan Sidwell <nathan@codesourcery.com> Vladimir Prus <vladimir@codesourcery.com Joseph Myers <joseph@codesourcery.com> * configure.ac (TOPLEVEL_CONFIGURE_ARGUMENTS): Fix quoting. * configure: Regenerate. bfd: 2007-02-17 Mark Mitchell <mark@codesourcery.com> Nathan Sidwell <nathan@codesourcery.com> Vladimir Prus <vladimir@codesourcery.com Joseph Myers <joseph@codesourcery.com> * configure.in (--with-pkgversion): New option. * configure: Regenerate. * Makefile.am (bfdver.h): Substitute for @bfd_version_package@. * Makefile.in: Regenerate. * version.h (BFD_VERSION_STRING): Define using @bfd_version_package@. bfd/doc: 2007-02-17 Mark Mitchell <mark@codesourcery.com> Nathan Sidwell <nathan@codesourcery.com> Vladimir Prus <vladimir@codesourcery.com Joseph Myers <joseph@codesourcery.com> * Makefile.in: Regenerate. binutils: 2007-02-17 Mark Mitchell <mark@codesourcery.com> Nathan Sidwell <nathan@codesourcery.com> Vladimir Prus <vladimir@codesourcery.com Joseph Myers <joseph@codesourcery.com> * configure.in (--with-bugurl): New option. * configure: Regenerate. * Makefile.am (REPORT_BUGS_TO): Define. (INCLUDES): Define REPORT_BUGS_TO. Regenerate dependencies. * Makefile.in: Regenerate. * doc/Makefile.in: Regenerate. * bucomm.h: Remove include of bin-bugs.h. * addr2line.c (usage): Don't print empty REPORT_BUGS_TO. * ar.c (usage): Pass s to list_supported_targets. Don't print empty REPORT_BUGS_TO. * coffdump.c (show_usage): Don't print empty REPORT_BUGS_TO. * cxxfilt.c (usage): Print bug url when giving help. * dlltool.c (usage): Likewise. * dllwrap.c (usage): Likewise. * nlmconv.c (show_usage): Don't print empty REPORT_BUGS_TO. * nm.c (usage): Likewise. * objcopy.c (copy_usage, strip_usage): Likewise. * objdump.c (usage): Likewise. * readelf.c ((usage): Likewise. Add STREAM argument. Adjust callers. * size.c (usage): Don't print empty REPORT_BUGS_TO. * srconv.c (show_usage): Likewise. * strings.c (usage): Likewise. * sysdymp.c (show_usage): Likewise. * windres.c (usage): Likewise. gas: 2007-02-17 Mark Mitchell <mark@codesourcery.com> Nathan Sidwell <nathan@codesourcery.com> Vladimir Prus <vladimir@codesourcery.com Joseph Myers <joseph@codesourcery.com> * configure.in (--with-bugurl): New option. * configure: Regenerate. * dep-in.sed: Remove bin-bugs.h. * Makefile.am (REPORT_BUGS_TO): Define. (INCLUDES): Define REPORT_BUGS_TO. (DEP_INCLUDES): Likewise. ($(OBJS)): No longer depend on bin-bugs.h. * Makefile.in: Regenerate. * doc/Makefile.in: Regenerate. * as.c (show_usage): Don't print empty REPORT_BUGS_TO. * as.h: Remove include of bin-bugs.h. gprof: 2007-02-17 Mark Mitchell <mark@codesourcery.com> Nathan Sidwell <nathan@codesourcery.com> Vladimir Prus <vladimir@codesourcery.com Joseph Myers <joseph@codesourcery.com> * configure.in (--with-pkgversion, --with-bugurl): New options. * configure: Regenerate. * Makefile.am (PKGVERSION, REPORT_BUGS_TO): Define. (INCLUDES): Define PKGVERSION and REPORT_BUGS_TO. Regenerate dependencies. * Makefile.in: Regenerate. * gprof.c (usage): Don't print empty REPORT_BUGS_TO. (main): Include PKGVERSION in version output. * gprof.h: Remove include of bin-bugs.h. include: 2007-02-17 Mark Mitchell <mark@codesourcery.com> Nathan Sidwell <nathan@codesourcery.com> Vladimir Prus <vladimir@codesourcery.com Joseph Myers <joseph@codesourcery.com> * bin-bugs.h: Remove. ld: 2007-02-17 Mark Mitchell <mark@codesourcery.com> Nathan Sidwell <nathan@codesourcery.com> Vladimir Prus <vladimir@codesourcery.com Joseph Myers <joseph@codesourcery.com> * configure.in (--with-bugurl): New option. * configure: Regenerate. * Makefile.am (REPORT_BUGS_TO): Define. (INCLUDES): Define REPORT_BUGS_TO. Regenerate dependencies. * Makefile.in: Regenerate. * ld.h: Remove include of bin-bugs.h. * lexsup.c (help): Don't print empty REPORT_BUGS_TO.
2007-02-17 14:33:57 +01:00
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 "_$.";
}
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);
Fix memory access violations triggered by running strip on fuzzed binaries. PR binutils/17512 * coffcode.h (coff_set_arch_mach_hook): Check return value from bfd_malloc. (coff_slurp_line_table): Return FALSE if the line number information was corrupt. (coff_slurp_symbol_table): Return FALSE if the symbol information was corrupt. * mach-o.c (bfd_mach_o_bfd_copy_private_header_data): Always initialise the fields of the dyld_info structure. (bfd_mach_o_build_exec_seg_command): Replace assertion with an error message and a return value. (bfd_mach_o_layout_commands): Change the function to boolean. Return FALSE if the function fails. (bfd_mach_o_build_commands): Fail if bfd_mach_o_layout_commands fails. (bfd_mach_o_read_command): Fail if an unrecognised command is encountered. * peXXigen.c (_bfd_XXi_swap_aouthdr_in): Set bfd_error if the read fails. (slurp_symtab): Check the return from bfd_malloc. (_bfd_XX_bfd_copy_private_bfd_data_common): Fail if the copy encountered an error. (_bfd_XXi_final_link_postscript): Fail if a section could not be copied. * peicode.h (pe_bfd_object_p): Fail if the header could not be swapped in. * tekhex.c (first_phase): Fail if the section is too big. * versados.c (struct esdid): Add content_size field. (process_otr): Use and check the new field. (versados_get_section_contents): Check that the section exists and that the requested data is available. PR binutils/17512 * addr2line.c (main): Call bfd_set_error_program_name. * ar.c (main): Likewise. * coffdump.c (main): Likewise. * cxxfilt.c (main): Likewise. * dlltool.c (main): Likewise. * nlmconv.c (main): Likewise. * nm.c (main): Likewise. * objdump.c (main): Likewise. * size.c (main): Likewise. * srconv.c (main): Likewise. * strings.c (main): Likewise. * sysdump.c (main): Likewise. * windmc.c (main): Likewise. * windres.c (main): Likewise. * objcopy.c (main): Likewise. (copy_relocations_in_section): Check for relocs without associated symbol pointers.
2015-01-21 18:37:23 +01:00
bfd_set_error_program_name (program_name);
expandargv (&argc, &argv);
Synchronize libiberty with gcc and add --no-recruse-limit option to tools that support name demangling. This patch addresses the multitude of bug reports about resource exhaustion in libiberty's name demangling code. It adds a limit to the amount of recursion that is allowed, before an error is triggered. It also adds a new demangling option to disable this limit. (The limit is enabled by default). PR 87681 PR 87675 PR 87636 PR 87335 libiberty * cp-demangle.h (struct d_info): Add recursion_limit field. * cp-demangle.c (d_function_type): If the recursion limit is enabled and reached, return with a failure result. (d_demangle_callback): If the recursion limit is enabled, check for a mangled string that is so long that there is not enough stack space for the local arrays. * cplus-dem.c (struct work): Add recursion_level field. (demangle_nested_args): If the recursion limit is enabled and reached, return with a failure result. include * demangle.h (DMGL_RECURSE_LIMIT): Define. (DEMANGLE_RECURSION_LIMIT): Prototype. binutuils * addr2line.c (demangle_flags): New static variable. (long_options): Add --recurse-limit and --no-recurse-limit. (translate_address): Pass demangle_flags to bfd_demangle. (main): Handle --recurse-limit and --no-recurse-limit options. * cxxfilt.c (flags): Add DMGL_RECURSE_LIMIT. (long_options): Add --recurse-limit and --no-recurse-limit. (main): Handle new options. * dlltool.c (gen_def_file): Include DMGL_RECURSE_LIMIT in flags passed to cplus_demangle. * nm.c (demangle_flags): New static variable. (long_options): Add --recurse-limit and --no-recurse-limit. (main): Handle new options. * objdump.c (demangle_flags): New static variable. (usage): Add --recurse-limit and --no-recurse-limit. (long_options): Likewise. (objdump_print_symname): Pass demangle_flags to bfd_demangle. (disassemble_section): Likewise. (dump_dymbols): Likewise. (main): Handle new options. * prdbg.c (demangle_flags): New static variable. (tg_variable): Pass demangle_flags to demangler. (tg_start_function): Likewise. * stabs.c (demangle_flags): New static variable. (stab_demangle_template): Pass demangle_flags to demangler. (stab_demangle_v3_argtypes): Likewise. (stab_demangle_v3_arg): Likewise. * doc/binutuls.texi: Document new command line options. * NEWS: Mention the new feature. * testsuite/config/default.exp (CXXFILT): Define if not already defined. (CXXFILTFLAGS): Likewise. * testsuite/binutils-all/cxxfilt.exp: New file. Runs a few simple tests of the cxxfilt program.
2018-12-07 12:32:55 +01:00
while ((c = getopt_long (argc, argv, "_hinprRs: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;
Synchronize libiberty with gcc and add --no-recruse-limit option to tools that support name demangling. This patch addresses the multitude of bug reports about resource exhaustion in libiberty's name demangling code. It adds a limit to the amount of recursion that is allowed, before an error is triggered. It also adds a new demangling option to disable this limit. (The limit is enabled by default). PR 87681 PR 87675 PR 87636 PR 87335 libiberty * cp-demangle.h (struct d_info): Add recursion_limit field. * cp-demangle.c (d_function_type): If the recursion limit is enabled and reached, return with a failure result. (d_demangle_callback): If the recursion limit is enabled, check for a mangled string that is so long that there is not enough stack space for the local arrays. * cplus-dem.c (struct work): Add recursion_level field. (demangle_nested_args): If the recursion limit is enabled and reached, return with a failure result. include * demangle.h (DMGL_RECURSE_LIMIT): Define. (DEMANGLE_RECURSION_LIMIT): Prototype. binutuils * addr2line.c (demangle_flags): New static variable. (long_options): Add --recurse-limit and --no-recurse-limit. (translate_address): Pass demangle_flags to bfd_demangle. (main): Handle --recurse-limit and --no-recurse-limit options. * cxxfilt.c (flags): Add DMGL_RECURSE_LIMIT. (long_options): Add --recurse-limit and --no-recurse-limit. (main): Handle new options. * dlltool.c (gen_def_file): Include DMGL_RECURSE_LIMIT in flags passed to cplus_demangle. * nm.c (demangle_flags): New static variable. (long_options): Add --recurse-limit and --no-recurse-limit. (main): Handle new options. * objdump.c (demangle_flags): New static variable. (usage): Add --recurse-limit and --no-recurse-limit. (long_options): Likewise. (objdump_print_symname): Pass demangle_flags to bfd_demangle. (disassemble_section): Likewise. (dump_dymbols): Likewise. (main): Handle new options. * prdbg.c (demangle_flags): New static variable. (tg_variable): Pass demangle_flags to demangler. (tg_start_function): Likewise. * stabs.c (demangle_flags): New static variable. (stab_demangle_template): Pass demangle_flags to demangler. (stab_demangle_v3_argtypes): Likewise. (stab_demangle_v3_arg): Likewise. * doc/binutuls.texi: Document new command line options. * NEWS: Mention the new feature. * testsuite/config/default.exp (CXXFILT): Define if not already defined. (CXXFILTFLAGS): Likewise. * testsuite/binutils-all/cxxfilt.exp: New file. Runs a few simple tests of the cxxfilt program.
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case 'r':
flags |= DMGL_NO_RECURSE_LIMIT;
break;
case 'R':
flags &= ~ DMGL_NO_RECURSE_LIMIT;
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 auto_demangling:
case gnu_v3_demangling:
case java_demangling:
case gnat_demangling:
case dlang_demangling:
2016-11-17 01:28:09 +01:00
case rust_demangling:
valid_symbols = standard_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;
}