| /* Basic C++ demangling support for GDB. |
| |
| Copyright (C) 1991-1996, 1998-2001, 2003, 2007-2012 Free Software |
| Foundation, Inc. |
| |
| Written by Fred Fish at Cygnus Support. |
| |
| This file is part of GDB. |
| |
| 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 this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| |
| /* This file contains support code for C++ demangling that is common |
| to a styles of demangling, and GDB specific. */ |
| |
| #include "defs.h" |
| #include "command.h" |
| #include "gdbcmd.h" |
| #include "demangle.h" |
| #include "gdb-demangle.h" |
| #include "gdb_string.h" |
| |
| /* Select the default C++ demangling style to use. The default is "auto", |
| which allows gdb to attempt to pick an appropriate demangling style for |
| the executable it has loaded. It can be set to a specific style ("gnu", |
| "lucid", "arm", "hp", etc.) in which case gdb will never attempt to do auto |
| selection of the style unless you do an explicit "set demangle auto". |
| To select one of these as the default, set DEFAULT_DEMANGLING_STYLE in |
| the appropriate target configuration file. */ |
| |
| #ifndef DEFAULT_DEMANGLING_STYLE |
| #define DEFAULT_DEMANGLING_STYLE AUTO_DEMANGLING_STYLE_STRING |
| #endif |
| |
| /* See documentation in gdb-demangle.h. */ |
| int demangle = 1; |
| |
| static void |
| show_demangle (struct ui_file *file, int from_tty, |
| struct cmd_list_element *c, const char *value) |
| { |
| fprintf_filtered (file, |
| _("Demangling of encoded C++/ObjC names " |
| "when displaying symbols is %s.\n"), |
| value); |
| } |
| |
| /* See documentation in gdb-demangle.h. */ |
| int asm_demangle = 0; |
| |
| static void |
| show_asm_demangle (struct ui_file *file, int from_tty, |
| struct cmd_list_element *c, const char *value) |
| { |
| fprintf_filtered (file, |
| _("Demangling of C++/ObjC names in " |
| "disassembly listings is %s.\n"), |
| value); |
| } |
| |
| /* String name for the current demangling style. Set by the |
| "set demangle-style" command, printed as part of the output by the |
| "show demangle-style" command. */ |
| |
| static char *current_demangling_style_string; |
| |
| /* The array of names of the known demanglyng styles. Generated by |
| _initialize_demangler from libiberty_demanglers[] array. */ |
| |
| static const char **demangling_style_names; |
| static void |
| show_demangling_style_names(struct ui_file *file, int from_tty, |
| struct cmd_list_element *c, const char *value) |
| { |
| fprintf_filtered (file, _("The current C++ demangling style is \"%s\".\n"), |
| value); |
| } |
| |
| /* Set current demangling style. Called by the "set demangle-style" |
| command after it has updated the current_demangling_style_string to |
| match what the user has entered. |
| |
| If the user has entered a string that matches a known demangling style |
| name in the demanglers[] array then just leave the string alone and update |
| the current_demangling_style enum value to match. |
| |
| If the user has entered a string that doesn't match, including an empty |
| string, then print a list of the currently known styles and restore |
| the current_demangling_style_string to match the current_demangling_style |
| enum value. |
| |
| Note: Assumes that current_demangling_style_string always points to |
| a malloc'd string, even if it is a null-string. */ |
| |
| static void |
| set_demangling_command (char *ignore, int from_tty, struct cmd_list_element *c) |
| { |
| const struct demangler_engine *dem; |
| |
| /* First just try to match whatever style name the user supplied with |
| one of the known ones. Don't bother special casing for an empty |
| name, we just treat it as any other style name that doesn't match. |
| If we match, update the current demangling style enum. */ |
| |
| for (dem = libiberty_demanglers; |
| dem->demangling_style != unknown_demangling; |
| dem++) |
| { |
| if (strcmp (current_demangling_style_string, |
| dem->demangling_style_name) == 0) |
| { |
| current_demangling_style = dem->demangling_style; |
| break; |
| } |
| } |
| |
| /* Check to see if we found a match. If not, gripe about any non-empty |
| style name and supply a list of valid ones. FIXME: This should |
| probably be done with some sort of completion and with help. */ |
| |
| if (dem->demangling_style == unknown_demangling) |
| { |
| if (*current_demangling_style_string != '\0') |
| { |
| printf_unfiltered (_("Unknown demangling style `%s'.\n"), |
| current_demangling_style_string); |
| } |
| printf_unfiltered (_("The currently understood settings are:\n\n")); |
| for (dem = libiberty_demanglers; |
| dem->demangling_style != unknown_demangling; |
| dem++) |
| { |
| printf_unfiltered ("%-10s %s\n", dem->demangling_style_name, |
| dem->demangling_style_doc); |
| if (dem->demangling_style == current_demangling_style) |
| { |
| xfree (current_demangling_style_string); |
| current_demangling_style_string = |
| xstrdup (dem->demangling_style_name); |
| } |
| } |
| if (current_demangling_style == unknown_demangling) |
| { |
| /* This can happen during initialization if gdb is compiled with |
| a DEMANGLING_STYLE value that is unknown, so pick the first |
| one as the default. */ |
| current_demangling_style = libiberty_demanglers[0].demangling_style; |
| current_demangling_style_string = |
| xstrdup (libiberty_demanglers[0].demangling_style_name); |
| warning (_("`%s' style demangling chosen as the default."), |
| current_demangling_style_string); |
| } |
| } |
| } |
| |
| /* See documentation in gdb-demangle.h. */ |
| |
| void |
| set_demangling_style (char *style) |
| { |
| if (current_demangling_style_string != NULL) |
| { |
| xfree (current_demangling_style_string); |
| } |
| current_demangling_style_string = xstrdup (style); |
| set_demangling_command ((char *) NULL, 0, (struct cmd_list_element *) NULL); |
| } |
| |
| /* G++ uses a special character to indicate certain internal names. Which |
| character it is depends on the platform: |
| - Usually '$' on systems where the assembler will accept that |
| - Usually '.' otherwise (this includes most sysv4-like systems and most |
| ELF targets) |
| - Occasionally '_' if neither of the above is usable |
| |
| We check '$' first because it is the safest, and '.' often has another |
| meaning. We don't currently try to handle '_' because the precise forms |
| of the names are different on those targets. */ |
| |
| static char cplus_markers[] = {'$', '.', '\0'}; |
| |
| /* See documentation in gdb-demangle.h. */ |
| |
| int |
| is_cplus_marker (int c) |
| { |
| return c && strchr (cplus_markers, c) != NULL; |
| } |
| |
| extern initialize_file_ftype _initialize_demangler; /* -Wmissing-prototypes */ |
| |
| void |
| _initialize_demangler (void) |
| { |
| int i, ndems; |
| |
| /* Fill the demangling_style_names[] array. */ |
| for (ndems = 0; |
| libiberty_demanglers[ndems].demangling_style != unknown_demangling; |
| ndems++) |
| ; |
| demangling_style_names = xcalloc (ndems + 1, sizeof (char *)); |
| for (i = 0; |
| libiberty_demanglers[i].demangling_style != unknown_demangling; |
| i++) |
| demangling_style_names[i] = |
| xstrdup (libiberty_demanglers[i].demangling_style_name); |
| |
| add_setshow_boolean_cmd ("demangle", class_support, &demangle, _("\ |
| Set demangling of encoded C++/ObjC names when displaying symbols."), _("\ |
| Show demangling of encoded C++/ObjC names when displaying symbols."), NULL, |
| NULL, |
| show_demangle, |
| &setprintlist, &showprintlist); |
| |
| add_setshow_boolean_cmd ("asm-demangle", class_support, &asm_demangle, _("\ |
| Set demangling of C++/ObjC names in disassembly listings."), _("\ |
| Show demangling of C++/ObjC names in disassembly listings."), NULL, |
| NULL, |
| show_asm_demangle, |
| &setprintlist, &showprintlist); |
| |
| /* FIXME: cagney/2005-02-20: The code implementing this variable are |
| malloc-ing and free-ing current_demangling_style_string when it |
| should instead just point to an element of |
| demangling_style_names. */ |
| add_setshow_enum_cmd ("demangle-style", class_support, |
| demangling_style_names, |
| (const char **) ¤t_demangling_style_string, _("\ |
| Set the current C++ demangling style."), _("\ |
| Show the current C++ demangling style."), _("\ |
| Use `set demangle-style' without arguments for a list of demangling styles."), |
| set_demangling_command, |
| show_demangling_style_names, |
| &setlist, &showlist); |
| |
| /* Set the default demangling style chosen at compilation time. */ |
| set_demangling_style (DEFAULT_DEMANGLING_STYLE); |
| } |