1 /* Basic C++ demangling support for GDB.
2 Copyright 1991, 1992 Free Software Foundation, Inc.
3 Written by Fred Fish at Cygnus Support.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
22 /* This file contains support code for C++ demangling that is common
23 to a styles of demangling, and GDB specific. */
31 /* Select the default C++ demangling style to use. The default is "auto",
32 which allows gdb to attempt to pick an appropriate demangling style for
33 the executable it has loaded. It can be set to a specific style ("gnu",
34 "lucid", "cfront", etc.) in which case gdb will never attempt to do auto
35 selection of the style unless you do an explicit "set demangle auto".
36 To select one of these as the default, set DEFAULT_DEMANGLING_STYLE in
37 the appropriate target configuration file. */
39 #ifndef DEFAULT_DEMANGLING_STYLE
40 # define DEFAULT_DEMANGLING_STYLE AUTO_DEMANGLING_STYLE_STRING
43 /* String name for the current demangling style. Set by the "set demangling"
44 command, printed as part of the output by the "show demangling" command. */
46 static char *current_demangling_style_string;
48 /* List of supported demangling styles. Contains the name of the style as
49 seen by the user, and the enum value that corresponds to that style. */
51 static const struct demangler
53 char *demangling_style_name;
54 enum demangling_styles demangling_style;
55 char *demangling_style_doc;
58 {AUTO_DEMANGLING_STYLE_STRING,
60 "Automatic selection based on executable"},
61 {GNU_DEMANGLING_STYLE_STRING,
63 "GNU (g++) style demangling"},
64 {LUCID_DEMANGLING_STYLE_STRING,
66 "Lucid (lcc) style demangling"},
67 {CFRONT_DEMANGLING_STYLE_STRING,
69 "ARM (cfront) style demangling"},
73 /* show current demangling style. */
76 show_demangling_command (ignore, from_tty)
80 /* done automatically by show command. */
84 /* set current demangling style. called by the "set demangling" command
85 after it has updated the current_demangling_style_string to match
86 what the user has entered.
88 if the user has entered a string that matches a known demangling style
89 name in the demanglers[] array then just leave the string alone and update
90 the current_demangling_style enum value to match.
92 if the user has entered a string that doesn't match, including an empty
93 string, then print a list of the currently known styles and restore
94 the current_demangling_style_string to match the current_demangling_style
97 Note: Assumes that current_demangling_style_string always points to
98 a malloc'd string, even if it is a null-string. */
101 set_demangling_command (ignore, from_tty)
105 const struct demangler *dem;
107 /* First just try to match whatever style name the user supplied with
108 one of the known ones. Don't bother special casing for an empty
109 name, we just treat it as any other style name that doesn't match.
110 If we match, update the current demangling style enum. */
112 for (dem = demanglers; dem -> demangling_style_name != NULL; dem++)
114 if (strcmp (current_demangling_style_string,
115 dem -> demangling_style_name) == 0)
117 current_demangling_style = dem -> demangling_style;
122 /* Check to see if we found a match. If not, gripe about any non-empty
123 style name and supply a list of valid ones. FIXME: This should
124 probably be done with some sort of completion and with help. */
126 if (dem -> demangling_style_name == NULL)
128 if (*current_demangling_style_string != '\0')
130 printf ("Unknown demangling style `%s'.\n",
131 current_demangling_style_string);
133 printf ("The currently understood settings are:\n\n");
134 for (dem = demanglers; dem -> demangling_style_name != NULL; dem++)
136 printf ("%-10s %s\n", dem -> demangling_style_name,
137 dem -> demangling_style_doc);
138 if (dem -> demangling_style == current_demangling_style)
140 free (current_demangling_style_string);
141 current_demangling_style_string =
142 strdup (dem -> demangling_style_name);
145 if (current_demangling_style == unknown_demangling)
147 /* This can happen during initialization if gdb is compiled with
148 a DEMANGLING_STYLE value that is unknown, so pick the first
149 one as the default. */
150 current_demangling_style = demanglers[0].demangling_style;
151 current_demangling_style_string =
152 strdup (demanglers[0].demangling_style_name);
153 warning ("`%s' style demangling chosen as the default.\n",
154 current_demangling_style_string);
159 /* Fake a "set demangling" command. */
162 set_demangling_style (style)
165 if (current_demangling_style_string != NULL)
167 free (current_demangling_style_string);
169 current_demangling_style_string = strdup (style);
170 set_demangling_command ((char *) NULL, 0);
174 _initialize_demangler ()
176 struct cmd_list_element *set, *show;
178 set = add_set_cmd ("demangle-style", class_support, var_string_noescape,
179 (char *) ¤t_demangling_style_string,
180 "Set the current C++ demangling style.",
182 show = add_show_from_set (set, &showlist);
183 set -> function.cfunc = set_demangling_command;
184 show -> function.cfunc = show_demangling_command;
186 /* Set the default demangling style chosen at compilation time. */
187 set_demangling_style (DEFAULT_DEMANGLING_STYLE);
188 set_cplus_marker_for_demangling (CPLUS_MARKER);