| /* Basic C++ demangling support for GDB. |
| Copyright 1991, 1992, 1996, 1999 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 2 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, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| |
| |
| /* 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_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 |
| |
| /* 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; |
| |
| /* List of supported demangling styles. Contains the name of the style as |
| seen by the user, and the enum value that corresponds to that style. */ |
| |
| static const struct demangler |
| { |
| char *demangling_style_name; |
| enum demangling_styles demangling_style; |
| char *demangling_style_doc; |
| } |
| demanglers[] = |
| { |
| { |
| AUTO_DEMANGLING_STYLE_STRING, |
| auto_demangling, |
| "Automatic selection based on executable" |
| } |
| , |
| { |
| GNU_DEMANGLING_STYLE_STRING, |
| gnu_demangling, |
| "GNU (g++) style demangling" |
| } |
| , |
| { |
| LUCID_DEMANGLING_STYLE_STRING, |
| lucid_demangling, |
| "Lucid (lcc) style demangling" |
| } |
| , |
| { |
| ARM_DEMANGLING_STYLE_STRING, |
| arm_demangling, |
| "ARM style demangling" |
| } |
| , |
| { |
| HP_DEMANGLING_STYLE_STRING, |
| hp_demangling, |
| "HP (aCC) style demangling" |
| } |
| , |
| { |
| EDG_DEMANGLING_STYLE_STRING, |
| edg_demangling, |
| "EDG style demangling" |
| } |
| , |
| { |
| NULL, unknown_demangling, NULL |
| } |
| }; |
| |
| static void |
| set_demangling_command PARAMS ((char *, int, struct cmd_list_element *)); |
| |
| /* 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 (ignore, from_tty, c) |
| char *ignore; |
| int from_tty; |
| struct cmd_list_element *c; |
| { |
| const struct demangler *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 = demanglers; dem->demangling_style_name != NULL; dem++) |
| { |
| if (STREQ (current_demangling_style_string, |
| dem->demangling_style_name)) |
| { |
| 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_name == NULL) |
| { |
| 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 = demanglers; dem->demangling_style_name != NULL; dem++) |
| { |
| printf_unfiltered ("%-10s %s\n", dem->demangling_style_name, |
| dem->demangling_style_doc); |
| if (dem->demangling_style == current_demangling_style) |
| { |
| free (current_demangling_style_string); |
| current_demangling_style_string = |
| savestring (dem->demangling_style_name, |
| strlen (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 = demanglers[0].demangling_style; |
| current_demangling_style_string = |
| savestring (demanglers[0].demangling_style_name, |
| strlen (demanglers[0].demangling_style_name)); |
| warning ("`%s' style demangling chosen as the default.\n", |
| current_demangling_style_string); |
| } |
| } |
| } |
| |
| /* Fake a "set demangle-style" command. */ |
| |
| void |
| set_demangling_style (style) |
| char *style; |
| { |
| if (current_demangling_style_string != NULL) |
| { |
| free (current_demangling_style_string); |
| } |
| current_demangling_style_string = savestring (style, strlen (style)); |
| set_demangling_command ((char *) NULL, 0, (struct cmd_list_element *) NULL); |
| } |
| |
| /* In order to allow a single demangler executable to demangle strings |
| using various common values of CPLUS_MARKER, as well as any specific |
| one set at compile time, we maintain a string containing all the |
| commonly used ones, and check to see if the marker we are looking for |
| is in that string. CPLUS_MARKER is usually '$' on systems where the |
| assembler can deal with that. Where the assembler can't, it's usually |
| '.' (but on many systems '.' is used for other things). We put the |
| current defined CPLUS_MARKER first (which defaults to '$'), followed |
| by the next most common value, followed by an explicit '$' in case |
| the value of CPLUS_MARKER is not '$'. |
| |
| We could avoid this if we could just get g++ to tell us what the actual |
| cplus marker character is as part of the debug information, perhaps by |
| ensuring that it is the character that terminates the gcc<n>_compiled |
| marker symbol (FIXME). */ |
| |
| static char cplus_markers[] = {CPLUS_MARKER, '.', '$', '\0'}; |
| |
| int |
| is_cplus_marker (c) |
| int c; |
| { |
| return c && strchr (cplus_markers, c) != NULL; |
| } |
| |
| void |
| _initialize_demangler () |
| { |
| struct cmd_list_element *set, *show; |
| |
| set = add_set_cmd ("demangle-style", class_support, var_string_noescape, |
| (char *) ¤t_demangling_style_string, |
| "Set the current C++ demangling style.\n\ |
| Use `set demangle-style' without arguments for a list of demangling styles.", |
| &setlist); |
| show = add_show_from_set (set, &showlist); |
| set->function.sfunc = set_demangling_command; |
| |
| /* Set the default demangling style chosen at compilation time. */ |
| set_demangling_style (DEFAULT_DEMANGLING_STYLE); |
| set_cplus_marker_for_demangling (CPLUS_MARKER); |
| } |