1 /* Basic C++ demangling support for GDB.
3 Copyright (C) 1991-2014 Free Software Foundation, Inc.
5 Written by Fred Fish at Cygnus Support.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 /* This file contains support code for C++ demangling that is common
24 to a styles of demangling, and GDB specific. */
30 #include "gdb-demangle.h"
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", "arm", "hp", 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 /* See documentation in gdb-demangle.h. */
47 show_demangle (struct ui_file
*file
, int from_tty
,
48 struct cmd_list_element
*c
, const char *value
)
50 fprintf_filtered (file
,
51 _("Demangling of encoded C++/ObjC names "
52 "when displaying symbols is %s.\n"),
56 /* See documentation in gdb-demangle.h. */
60 show_asm_demangle (struct ui_file
*file
, int from_tty
,
61 struct cmd_list_element
*c
, const char *value
)
63 fprintf_filtered (file
,
64 _("Demangling of C++/ObjC names in "
65 "disassembly listings is %s.\n"),
69 /* String name for the current demangling style. Set by the
70 "set demangle-style" command, printed as part of the output by the
71 "show demangle-style" command. */
73 static const char *current_demangling_style_string
;
75 /* The array of names of the known demanglyng styles. Generated by
76 _initialize_demangler from libiberty_demanglers[] array. */
78 static const char **demangling_style_names
;
80 show_demangling_style_names(struct ui_file
*file
, int from_tty
,
81 struct cmd_list_element
*c
, const char *value
)
83 fprintf_filtered (file
, _("The current C++ demangling style is \"%s\".\n"),
87 /* Set current demangling style. Called by the "set demangle-style"
88 command after it has updated the current_demangling_style_string to
89 match what the user has entered.
91 If the user has entered a string that matches a known demangling style
92 name in the demanglers[] array then just leave the string alone and update
93 the current_demangling_style enum value to match.
95 If the user has entered a string that doesn't match, including an empty
96 string, then print a list of the currently known styles and restore
97 the current_demangling_style_string to match the current_demangling_style
100 Note: Assumes that current_demangling_style_string always points to
101 a malloc'd string, even if it is a null-string. */
104 set_demangling_command (char *ignore
, int from_tty
, struct cmd_list_element
*c
)
106 const struct demangler_engine
*dem
;
109 /* First just try to match whatever style name the user supplied with
110 one of the known ones. Don't bother special casing for an empty
111 name, we just treat it as any other style name that doesn't match.
112 If we match, update the current demangling style enum. */
114 for (dem
= libiberty_demanglers
, i
= 0;
115 dem
->demangling_style
!= unknown_demangling
;
118 if (strcmp (current_demangling_style_string
,
119 dem
->demangling_style_name
) == 0)
121 current_demangling_style
= dem
->demangling_style
;
122 current_demangling_style_string
= demangling_style_names
[i
];
128 /* We should have found a match, given we only add known styles to
129 the enumeration list. */
130 gdb_assert (dem
->demangling_style
!= unknown_demangling
);
133 /* G++ uses a special character to indicate certain internal names. Which
134 character it is depends on the platform:
135 - Usually '$' on systems where the assembler will accept that
136 - Usually '.' otherwise (this includes most sysv4-like systems and most
138 - Occasionally '_' if neither of the above is usable
140 We check '$' first because it is the safest, and '.' often has another
141 meaning. We don't currently try to handle '_' because the precise forms
142 of the names are different on those targets. */
144 static char cplus_markers
[] = {'$', '.', '\0'};
146 /* See documentation in gdb-demangle.h. */
149 is_cplus_marker (int c
)
151 return c
&& strchr (cplus_markers
, c
) != NULL
;
154 extern initialize_file_ftype _initialize_demangler
; /* -Wmissing-prototypes */
157 _initialize_demangler (void)
161 /* Fill the demangling_style_names[] array, and set the default
162 demangling style chosen at compilation time. */
164 libiberty_demanglers
[ndems
].demangling_style
!= unknown_demangling
;
167 demangling_style_names
= xcalloc (ndems
+ 1, sizeof (char *));
169 libiberty_demanglers
[i
].demangling_style
!= unknown_demangling
;
172 demangling_style_names
[i
]
173 = xstrdup (libiberty_demanglers
[i
].demangling_style_name
);
175 if (current_demangling_style_string
== NULL
176 && strcmp (DEFAULT_DEMANGLING_STYLE
, demangling_style_names
[i
]) == 0)
177 current_demangling_style_string
= demangling_style_names
[i
];
180 add_setshow_boolean_cmd ("demangle", class_support
, &demangle
, _("\
181 Set demangling of encoded C++/ObjC names when displaying symbols."), _("\
182 Show demangling of encoded C++/ObjC names when displaying symbols."), NULL
,
185 &setprintlist
, &showprintlist
);
187 add_setshow_boolean_cmd ("asm-demangle", class_support
, &asm_demangle
, _("\
188 Set demangling of C++/ObjC names in disassembly listings."), _("\
189 Show demangling of C++/ObjC names in disassembly listings."), NULL
,
192 &setprintlist
, &showprintlist
);
194 add_setshow_enum_cmd ("demangle-style", class_support
,
195 demangling_style_names
,
196 ¤t_demangling_style_string
, _("\
197 Set the current C++ demangling style."), _("\
198 Show the current C++ demangling style."), _("\
199 Use `set demangle-style' without arguments for a list of demangling styles."),
200 set_demangling_command
,
201 show_demangling_style_names
,
202 &setlist
, &showlist
);