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authorStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
committerStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
commit071ea11e85eb9d529cc5eb3d35f6247466a21b99 (patch)
tree5deda65b8d7b04d1f4cbc534c3206d328e1267ec /gdb/demangle.c
parent1730ec6b1848f0f32154277f788fb29f88d8475b (diff)
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Initial creation of sourceware repository
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-/* Basic C++ demangling support for GDB.
- Copyright 1991, 1992, 1996, 1999 Free Software Foundation, Inc.
- Written by Fred Fish at Cygnus Support.
-
- This file is part of GDB.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
-
-/* This file contains support code for C++ demangling that is common
- to a styles of demangling, and GDB specific. */
-
-#include "defs.h"
-#include "command.h"
-#include "gdbcmd.h"
-#include "demangle.h"
-#include "gdb_string.h"
-
-/* Select the default C++ demangling style to use. The default is "auto",
- which allows gdb to attempt to pick an appropriate demangling style for
- the executable it has loaded. It can be set to a specific style ("gnu",
- "lucid", "arm", "hp", etc.) in which case gdb will never attempt to do auto
- selection of the style unless you do an explicit "set demangle auto".
- To select one of these as the default, set DEFAULT_DEMANGLING_STYLE in
- the appropriate target configuration file. */
-
-#ifndef DEFAULT_DEMANGLING_STYLE
-#define DEFAULT_DEMANGLING_STYLE AUTO_DEMANGLING_STYLE_STRING
-#endif
-
-/* String name for the current demangling style. Set by the
- "set demangle-style" command, printed as part of the output by the
- "show demangle-style" command. */
-
-static char *current_demangling_style_string;
-
-/* List of supported demangling styles. Contains the name of the style as
- seen by the user, and the enum value that corresponds to that style. */
-
-static const struct demangler
- {
- char *demangling_style_name;
- enum demangling_styles demangling_style;
- char *demangling_style_doc;
- }
-demanglers[] =
-{
- {
- AUTO_DEMANGLING_STYLE_STRING,
- auto_demangling,
- "Automatic selection based on executable"
- }
- ,
- {
- GNU_DEMANGLING_STYLE_STRING,
- gnu_demangling,
- "GNU (g++) style demangling"
- }
- ,
- {
- LUCID_DEMANGLING_STYLE_STRING,
- lucid_demangling,
- "Lucid (lcc) style demangling"
- }
- ,
- {
- ARM_DEMANGLING_STYLE_STRING,
- arm_demangling,
- "ARM style demangling"
- }
- ,
- {
- HP_DEMANGLING_STYLE_STRING,
- hp_demangling,
- "HP (aCC) style demangling"
- }
- ,
- {
- EDG_DEMANGLING_STYLE_STRING,
- edg_demangling,
- "EDG style demangling"
- }
- ,
- {
- NULL, unknown_demangling, NULL
- }
-};
-
-static void
-set_demangling_command PARAMS ((char *, int, struct cmd_list_element *));
-
-/* Set current demangling style. Called by the "set demangle-style"
- command after it has updated the current_demangling_style_string to
- match what the user has entered.
-
- If the user has entered a string that matches a known demangling style
- name in the demanglers[] array then just leave the string alone and update
- the current_demangling_style enum value to match.
-
- If the user has entered a string that doesn't match, including an empty
- string, then print a list of the currently known styles and restore
- the current_demangling_style_string to match the current_demangling_style
- enum value.
-
- Note: Assumes that current_demangling_style_string always points to
- a malloc'd string, even if it is a null-string. */
-
-static void
-set_demangling_command (ignore, from_tty, c)
- char *ignore;
- int from_tty;
- struct cmd_list_element *c;
-{
- const struct demangler *dem;
-
- /* First just try to match whatever style name the user supplied with
- one of the known ones. Don't bother special casing for an empty
- name, we just treat it as any other style name that doesn't match.
- If we match, update the current demangling style enum. */
-
- for (dem = demanglers; dem->demangling_style_name != NULL; dem++)
- {
- if (STREQ (current_demangling_style_string,
- dem->demangling_style_name))
- {
- current_demangling_style = dem->demangling_style;
- break;
- }
- }
-
- /* Check to see if we found a match. If not, gripe about any non-empty
- style name and supply a list of valid ones. FIXME: This should
- probably be done with some sort of completion and with help. */
-
- if (dem->demangling_style_name == NULL)
- {
- if (*current_demangling_style_string != '\0')
- {
- printf_unfiltered ("Unknown demangling style `%s'.\n",
- current_demangling_style_string);
- }
- printf_unfiltered ("The currently understood settings are:\n\n");
- for (dem = demanglers; dem->demangling_style_name != NULL; dem++)
- {
- printf_unfiltered ("%-10s %s\n", dem->demangling_style_name,
- dem->demangling_style_doc);
- if (dem->demangling_style == current_demangling_style)
- {
- free (current_demangling_style_string);
- current_demangling_style_string =
- savestring (dem->demangling_style_name,
- strlen (dem->demangling_style_name));
- }
- }
- if (current_demangling_style == unknown_demangling)
- {
- /* This can happen during initialization if gdb is compiled with
- a DEMANGLING_STYLE value that is unknown, so pick the first
- one as the default. */
- current_demangling_style = demanglers[0].demangling_style;
- current_demangling_style_string =
- savestring (demanglers[0].demangling_style_name,
- strlen (demanglers[0].demangling_style_name));
- warning ("`%s' style demangling chosen as the default.\n",
- current_demangling_style_string);
- }
- }
-}
-
-/* Fake a "set demangle-style" command. */
-
-void
-set_demangling_style (style)
- char *style;
-{
- if (current_demangling_style_string != NULL)
- {
- free (current_demangling_style_string);
- }
- current_demangling_style_string = savestring (style, strlen (style));
- set_demangling_command ((char *) NULL, 0, (struct cmd_list_element *) NULL);
-}
-
-/* In order to allow a single demangler executable to demangle strings
- using various common values of CPLUS_MARKER, as well as any specific
- one set at compile time, we maintain a string containing all the
- commonly used ones, and check to see if the marker we are looking for
- is in that string. CPLUS_MARKER is usually '$' on systems where the
- assembler can deal with that. Where the assembler can't, it's usually
- '.' (but on many systems '.' is used for other things). We put the
- current defined CPLUS_MARKER first (which defaults to '$'), followed
- by the next most common value, followed by an explicit '$' in case
- the value of CPLUS_MARKER is not '$'.
-
- We could avoid this if we could just get g++ to tell us what the actual
- cplus marker character is as part of the debug information, perhaps by
- ensuring that it is the character that terminates the gcc<n>_compiled
- marker symbol (FIXME). */
-
-static char cplus_markers[] = {CPLUS_MARKER, '.', '$', '\0'};
-
-int
-is_cplus_marker (c)
- int c;
-{
- return c && strchr (cplus_markers, c) != NULL;
-}
-
-void
-_initialize_demangler ()
-{
- struct cmd_list_element *set, *show;
-
- set = add_set_cmd ("demangle-style", class_support, var_string_noescape,
- (char *) &current_demangling_style_string,
- "Set the current C++ demangling style.\n\
-Use `set demangle-style' without arguments for a list of demangling styles.",
- &setlist);
- show = add_show_from_set (set, &showlist);
- set->function.sfunc = set_demangling_command;
-
- /* Set the default demangling style chosen at compilation time. */
- set_demangling_style (DEFAULT_DEMANGLING_STYLE);
- set_cplus_marker_for_demangling (CPLUS_MARKER);
-}