240 lines
7.8 KiB
C
240 lines
7.8 KiB
C
/* Basic C++ demangling support for GDB.
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Copyright 1991, 1992, 1996, 1999 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 "gdb_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", "hp", 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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extern void _initialize_demangler PARAMS ((void));
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/* String name for the current demangling style. Set by the
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"set demangle-style" command, printed as part of the output by the
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"show demangle-style" 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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}
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demanglers[] =
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{
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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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}
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,
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{
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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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}
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,
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{
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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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}
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,
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{
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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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}
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,
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{
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HP_DEMANGLING_STYLE_STRING,
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hp_demangling,
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"HP (aCC) style demangling"
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}
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,
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{
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EDG_DEMANGLING_STYLE_STRING,
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edg_demangling,
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"EDG style demangling"
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}
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,
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{
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NULL, unknown_demangling, NULL
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}
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};
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static void
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set_demangling_command PARAMS ((char *, int, struct cmd_list_element *));
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/* Set current demangling style. Called by the "set demangle-style"
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command after it has updated the current_demangling_style_string to
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match 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, c)
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char *ignore;
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int from_tty;
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struct cmd_list_element *c;
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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_unfiltered ("Unknown demangling style `%s'.\n",
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current_demangling_style_string);
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}
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printf_unfiltered ("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_unfiltered ("%-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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savestring (dem->demangling_style_name,
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strlen (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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savestring (demanglers[0].demangling_style_name,
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strlen (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 demangle-style" 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 = savestring (style, strlen (style));
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set_demangling_command ((char *) NULL, 0, (struct cmd_list_element *) NULL);
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}
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/* In order to allow a single demangler executable to demangle strings
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using various common values of CPLUS_MARKER, as well as any specific
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one set at compile time, we maintain a string containing all the
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commonly used ones, and check to see if the marker we are looking for
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is in that string. CPLUS_MARKER is usually '$' on systems where the
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assembler can deal with that. Where the assembler can't, it's usually
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'.' (but on many systems '.' is used for other things). We put the
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current defined CPLUS_MARKER first (which defaults to '$'), followed
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by the next most common value, followed by an explicit '$' in case
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the value of CPLUS_MARKER is not '$'.
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We could avoid this if we could just get g++ to tell us what the actual
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cplus marker character is as part of the debug information, perhaps by
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ensuring that it is the character that terminates the gcc<n>_compiled
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marker symbol (FIXME). */
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static char cplus_markers[] = {CPLUS_MARKER, '.', '$', '\0'};
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int
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is_cplus_marker (c)
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int c;
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{
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return c && strchr (cplus_markers, c) != NULL;
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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.sfunc = set_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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