191 lines
6.3 KiB
C
191 lines
6.3 KiB
C
/* Basic C++ demangling support for GDB.
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Copyright 1991, 1992 Free Software Foundation, Inc.
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Written by Fred Fish at Cygnus Support.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* This file contains support code for C++ demangling that is common
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to a styles of demangling, and GDB specific. */
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#include "defs.h"
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#include "command.h"
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#include "gdbcmd.h"
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#include "demangle.h"
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#include <string.h>
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/* Select the default C++ demangling style to use. The default is "auto",
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which allows gdb to attempt to pick an appropriate demangling style for
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the executable it has loaded. It can be set to a specific style ("gnu",
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"lucid", "arm", etc.) in which case gdb will never attempt to do auto
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selection of the style unless you do an explicit "set demangle auto".
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To select one of these as the default, set DEFAULT_DEMANGLING_STYLE in
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the appropriate target configuration file. */
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#ifndef DEFAULT_DEMANGLING_STYLE
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# define DEFAULT_DEMANGLING_STYLE AUTO_DEMANGLING_STYLE_STRING
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#endif
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/* String name for the current demangling style. Set by the "set demangling"
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command, printed as part of the output by the "show demangling" command. */
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static char *current_demangling_style_string;
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/* List of supported demangling styles. Contains the name of the style as
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seen by the user, and the enum value that corresponds to that style. */
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static const struct demangler
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{
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char *demangling_style_name;
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enum demangling_styles demangling_style;
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char *demangling_style_doc;
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} demanglers [] =
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{
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{AUTO_DEMANGLING_STYLE_STRING,
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auto_demangling,
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"Automatic selection based on executable"},
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{GNU_DEMANGLING_STYLE_STRING,
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gnu_demangling,
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"GNU (g++) style demangling"},
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{LUCID_DEMANGLING_STYLE_STRING,
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lucid_demangling,
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"Lucid (lcc) style demangling"},
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{ARM_DEMANGLING_STYLE_STRING,
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arm_demangling,
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"ARM style demangling"},
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{NULL, unknown_demangling, NULL}
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};
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/* show current demangling style. */
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static void
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show_demangling_command (ignore, from_tty)
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char *ignore;
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int from_tty;
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{
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/* done automatically by show command. */
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}
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/* set current demangling style. called by the "set demangling" command
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after it has updated the current_demangling_style_string to match
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what the user has entered.
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if the user has entered a string that matches a known demangling style
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name in the demanglers[] array then just leave the string alone and update
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the current_demangling_style enum value to match.
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if the user has entered a string that doesn't match, including an empty
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string, then print a list of the currently known styles and restore
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the current_demangling_style_string to match the current_demangling_style
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enum value.
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Note: Assumes that current_demangling_style_string always points to
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a malloc'd string, even if it is a null-string. */
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static void
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set_demangling_command (ignore, from_tty)
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char *ignore;
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int from_tty;
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{
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const struct demangler *dem;
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/* First just try to match whatever style name the user supplied with
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one of the known ones. Don't bother special casing for an empty
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name, we just treat it as any other style name that doesn't match.
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If we match, update the current demangling style enum. */
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for (dem = demanglers; dem -> demangling_style_name != NULL; dem++)
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{
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if (STREQ (current_demangling_style_string,
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dem -> demangling_style_name))
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{
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current_demangling_style = dem -> demangling_style;
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break;
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}
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}
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/* Check to see if we found a match. If not, gripe about any non-empty
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style name and supply a list of valid ones. FIXME: This should
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probably be done with some sort of completion and with help. */
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if (dem -> demangling_style_name == NULL)
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{
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if (*current_demangling_style_string != '\0')
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{
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printf ("Unknown demangling style `%s'.\n",
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current_demangling_style_string);
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}
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printf ("The currently understood settings are:\n\n");
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for (dem = demanglers; dem -> demangling_style_name != NULL; dem++)
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{
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printf ("%-10s %s\n", dem -> demangling_style_name,
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dem -> demangling_style_doc);
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if (dem -> demangling_style == current_demangling_style)
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{
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free (current_demangling_style_string);
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current_demangling_style_string =
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strdup (dem -> demangling_style_name);
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}
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}
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if (current_demangling_style == unknown_demangling)
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{
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/* This can happen during initialization if gdb is compiled with
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a DEMANGLING_STYLE value that is unknown, so pick the first
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one as the default. */
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current_demangling_style = demanglers[0].demangling_style;
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current_demangling_style_string =
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strdup (demanglers[0].demangling_style_name);
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warning ("`%s' style demangling chosen as the default.\n",
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current_demangling_style_string);
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}
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}
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}
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/* Fake a "set demangling" command. */
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void
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set_demangling_style (style)
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char *style;
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{
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if (current_demangling_style_string != NULL)
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{
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free (current_demangling_style_string);
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}
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current_demangling_style_string = strdup (style);
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set_demangling_command ((char *) NULL, 0);
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}
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void
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_initialize_demangler ()
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{
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struct cmd_list_element *set, *show;
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set = add_set_cmd ("demangle-style", class_support, var_string_noescape,
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(char *) ¤t_demangling_style_string,
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"Set the current C++ demangling style.\n\
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Use `set demangle-style' without arguments for a list of demangling styles.",
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&setlist);
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show = add_show_from_set (set, &showlist);
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set -> function.cfunc = set_demangling_command;
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show -> function.cfunc = show_demangling_command;
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/* Set the default demangling style chosen at compilation time. */
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set_demangling_style (DEFAULT_DEMANGLING_STYLE);
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set_cplus_marker_for_demangling (CPLUS_MARKER);
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}
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