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c906108c | 1 | /* Basic C++ demangling support for GDB. |
1bac305b | 2 | |
6aba47ca | 3 | Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, |
7b6bb8da | 4 | 2003, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. |
1bac305b | 5 | |
c906108c SS |
6 | Written by Fred Fish at Cygnus Support. |
7 | ||
8 | This file is part of GDB. | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 12 | the Free Software Foundation; either version 3 of the License, or |
c906108c SS |
13 | (at your option) any later version. |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
22 | |
23 | ||
24 | /* This file contains support code for C++ demangling that is common | |
0963b4bd | 25 | to a styles of demangling, and GDB specific. */ |
c906108c SS |
26 | |
27 | #include "defs.h" | |
28 | #include "command.h" | |
29 | #include "gdbcmd.h" | |
30 | #include "demangle.h" | |
50f182aa | 31 | #include "gdb-demangle.h" |
c906108c SS |
32 | #include "gdb_string.h" |
33 | ||
34 | /* Select the default C++ demangling style to use. The default is "auto", | |
35 | which allows gdb to attempt to pick an appropriate demangling style for | |
36 | the executable it has loaded. It can be set to a specific style ("gnu", | |
37 | "lucid", "arm", "hp", etc.) in which case gdb will never attempt to do auto | |
38 | selection of the style unless you do an explicit "set demangle auto". | |
39 | To select one of these as the default, set DEFAULT_DEMANGLING_STYLE in | |
0963b4bd | 40 | the appropriate target configuration file. */ |
c906108c SS |
41 | |
42 | #ifndef DEFAULT_DEMANGLING_STYLE | |
43 | #define DEFAULT_DEMANGLING_STYLE AUTO_DEMANGLING_STYLE_STRING | |
44 | #endif | |
45 | ||
50f182aa DE |
46 | /* See documentation in gdb-demangle.h. */ |
47 | int demangle = 1; | |
48 | ||
49 | static void | |
50 | show_demangle (struct ui_file *file, int from_tty, | |
51 | struct cmd_list_element *c, const char *value) | |
52 | { | |
53 | fprintf_filtered (file, | |
54 | _("Demangling of encoded C++/ObjC names " | |
55 | "when displaying symbols is %s.\n"), | |
56 | value); | |
57 | } | |
58 | ||
59 | /* See documentation in gdb-demangle.h. */ | |
60 | int asm_demangle = 0; | |
61 | ||
62 | static void | |
63 | show_asm_demangle (struct ui_file *file, int from_tty, | |
64 | struct cmd_list_element *c, const char *value) | |
65 | { | |
66 | fprintf_filtered (file, | |
67 | _("Demangling of C++/ObjC names in " | |
68 | "disassembly listings is %s.\n"), | |
69 | value); | |
70 | } | |
392a587b | 71 | |
c906108c SS |
72 | /* String name for the current demangling style. Set by the |
73 | "set demangle-style" command, printed as part of the output by the | |
0963b4bd | 74 | "show demangle-style" command. */ |
c906108c SS |
75 | |
76 | static char *current_demangling_style_string; | |
77 | ||
fa58ee11 EZ |
78 | /* The array of names of the known demanglyng styles. Generated by |
79 | _initialize_demangler from libiberty_demanglers[] array. */ | |
80 | ||
81 | static const char **demangling_style_names; | |
920d2a44 AC |
82 | static void |
83 | show_demangling_style_names(struct ui_file *file, int from_tty, | |
84 | struct cmd_list_element *c, const char *value) | |
85 | { | |
86 | fprintf_filtered (file, _("The current C++ demangling style is \"%s\".\n"), | |
87 | value); | |
88 | } | |
89 | ||
c906108c SS |
90 | /* Set current demangling style. Called by the "set demangle-style" |
91 | command after it has updated the current_demangling_style_string to | |
92 | match what the user has entered. | |
93 | ||
94 | If the user has entered a string that matches a known demangling style | |
95 | name in the demanglers[] array then just leave the string alone and update | |
96 | the current_demangling_style enum value to match. | |
97 | ||
98 | If the user has entered a string that doesn't match, including an empty | |
99 | string, then print a list of the currently known styles and restore | |
100 | the current_demangling_style_string to match the current_demangling_style | |
101 | enum value. | |
102 | ||
103 | Note: Assumes that current_demangling_style_string always points to | |
0963b4bd | 104 | a malloc'd string, even if it is a null-string. */ |
c906108c SS |
105 | |
106 | static void | |
fba45db2 | 107 | set_demangling_command (char *ignore, int from_tty, struct cmd_list_element *c) |
c906108c | 108 | { |
770de199 | 109 | const struct demangler_engine *dem; |
c906108c SS |
110 | |
111 | /* First just try to match whatever style name the user supplied with | |
112 | one of the known ones. Don't bother special casing for an empty | |
113 | name, we just treat it as any other style name that doesn't match. | |
0963b4bd | 114 | If we match, update the current demangling style enum. */ |
c906108c | 115 | |
770de199 DB |
116 | for (dem = libiberty_demanglers; |
117 | dem->demangling_style != unknown_demangling; | |
118 | dem++) | |
c906108c | 119 | { |
bde58177 AC |
120 | if (strcmp (current_demangling_style_string, |
121 | dem->demangling_style_name) == 0) | |
c906108c SS |
122 | { |
123 | current_demangling_style = dem->demangling_style; | |
124 | break; | |
125 | } | |
126 | } | |
127 | ||
128 | /* Check to see if we found a match. If not, gripe about any non-empty | |
0963b4bd MS |
129 | style name and supply a list of valid ones. FIXME: This should |
130 | probably be done with some sort of completion and with help. */ | |
c906108c | 131 | |
770de199 | 132 | if (dem->demangling_style == unknown_demangling) |
c906108c SS |
133 | { |
134 | if (*current_demangling_style_string != '\0') | |
135 | { | |
a3f17187 | 136 | printf_unfiltered (_("Unknown demangling style `%s'.\n"), |
c906108c SS |
137 | current_demangling_style_string); |
138 | } | |
a3f17187 | 139 | printf_unfiltered (_("The currently understood settings are:\n\n")); |
770de199 DB |
140 | for (dem = libiberty_demanglers; |
141 | dem->demangling_style != unknown_demangling; | |
142 | dem++) | |
c906108c SS |
143 | { |
144 | printf_unfiltered ("%-10s %s\n", dem->demangling_style_name, | |
145 | dem->demangling_style_doc); | |
146 | if (dem->demangling_style == current_demangling_style) | |
147 | { | |
b8c9b27d | 148 | xfree (current_demangling_style_string); |
c906108c | 149 | current_demangling_style_string = |
1b36a34b | 150 | xstrdup (dem->demangling_style_name); |
c906108c SS |
151 | } |
152 | } | |
153 | if (current_demangling_style == unknown_demangling) | |
154 | { | |
155 | /* This can happen during initialization if gdb is compiled with | |
156 | a DEMANGLING_STYLE value that is unknown, so pick the first | |
0963b4bd | 157 | one as the default. */ |
770de199 | 158 | current_demangling_style = libiberty_demanglers[0].demangling_style; |
c906108c | 159 | current_demangling_style_string = |
1b36a34b | 160 | xstrdup (libiberty_demanglers[0].demangling_style_name); |
8a3fe4f8 | 161 | warning (_("`%s' style demangling chosen as the default."), |
c906108c SS |
162 | current_demangling_style_string); |
163 | } | |
164 | } | |
165 | } | |
166 | ||
50f182aa | 167 | /* See documentation in gdb-demangle.h. */ |
c906108c SS |
168 | |
169 | void | |
fba45db2 | 170 | set_demangling_style (char *style) |
c906108c SS |
171 | { |
172 | if (current_demangling_style_string != NULL) | |
173 | { | |
b8c9b27d | 174 | xfree (current_demangling_style_string); |
c906108c | 175 | } |
1b36a34b | 176 | current_demangling_style_string = xstrdup (style); |
c906108c SS |
177 | set_demangling_command ((char *) NULL, 0, (struct cmd_list_element *) NULL); |
178 | } | |
179 | ||
8343f86c DJ |
180 | /* G++ uses a special character to indicate certain internal names. Which |
181 | character it is depends on the platform: | |
182 | - Usually '$' on systems where the assembler will accept that | |
183 | - Usually '.' otherwise (this includes most sysv4-like systems and most | |
184 | ELF targets) | |
185 | - Occasionally '_' if neither of the above is usable | |
186 | ||
187 | We check '$' first because it is the safest, and '.' often has another | |
188 | meaning. We don't currently try to handle '_' because the precise forms | |
189 | of the names are different on those targets. */ | |
190 | ||
191 | static char cplus_markers[] = {'$', '.', '\0'}; | |
c906108c | 192 | |
50f182aa DE |
193 | /* See documentation in gdb-demangle.h. */ |
194 | ||
c906108c | 195 | int |
fba45db2 | 196 | is_cplus_marker (int c) |
c906108c SS |
197 | { |
198 | return c && strchr (cplus_markers, c) != NULL; | |
199 | } | |
200 | ||
50f182aa DE |
201 | extern initialize_file_ftype _initialize_demangler; /* -Wmissing-prototypes */ |
202 | ||
c906108c | 203 | void |
fba45db2 | 204 | _initialize_demangler (void) |
c906108c | 205 | { |
fa58ee11 EZ |
206 | int i, ndems; |
207 | ||
208 | /* Fill the demangling_style_names[] array. */ | |
209 | for (ndems = 0; | |
210 | libiberty_demanglers[ndems].demangling_style != unknown_demangling; | |
211 | ndems++) | |
212 | ; | |
9e0c176c | 213 | demangling_style_names = xcalloc (ndems + 1, sizeof (char *)); |
fa58ee11 EZ |
214 | for (i = 0; |
215 | libiberty_demanglers[i].demangling_style != unknown_demangling; | |
216 | i++) | |
217 | demangling_style_names[i] = | |
218 | xstrdup (libiberty_demanglers[i].demangling_style_name); | |
219 | ||
50f182aa DE |
220 | add_setshow_boolean_cmd ("demangle", class_support, &demangle, _("\ |
221 | Set demangling of encoded C++/ObjC names when displaying symbols."), _("\ | |
222 | Show demangling of encoded C++/ObjC names when displaying symbols."), NULL, | |
223 | NULL, | |
224 | show_demangle, | |
225 | &setprintlist, &showprintlist); | |
226 | ||
227 | add_setshow_boolean_cmd ("asm-demangle", class_support, &asm_demangle, _("\ | |
228 | Set demangling of C++/ObjC names in disassembly listings."), _("\ | |
229 | Show demangling of C++/ObjC names in disassembly listings."), NULL, | |
230 | NULL, | |
231 | show_asm_demangle, | |
232 | &setprintlist, &showprintlist); | |
233 | ||
7ab04401 AC |
234 | /* FIXME: cagney/2005-02-20: The code implementing this variable are |
235 | malloc-ing and free-ing current_demangling_style_string when it | |
236 | should instead just point to an element of | |
237 | demangling_style_names. */ | |
238 | add_setshow_enum_cmd ("demangle-style", class_support, | |
239 | demangling_style_names, | |
240 | (const char **) ¤t_demangling_style_string, _("\ | |
241 | Set the current C++ demangling style."), _("\ | |
242 | Show the current C++ demangling style."), _("\ | |
243 | Use `set demangle-style' without arguments for a list of demangling styles."), | |
244 | set_demangling_command, | |
920d2a44 | 245 | show_demangling_style_names, |
7ab04401 | 246 | &setlist, &showlist); |
c906108c | 247 | |
0963b4bd | 248 | /* Set the default demangling style chosen at compilation time. */ |
c906108c | 249 | set_demangling_style (DEFAULT_DEMANGLING_STYLE); |
c906108c | 250 | } |