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Diffstat (limited to 'gdb/demangle.c')
| -rw-r--r-- | gdb/demangle.c | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/gdb/demangle.c b/gdb/demangle.c new file mode 100644 index 0000000..669d9ab --- /dev/null +++ b/gdb/demangle.c @@ -0,0 +1,237 @@ +/* 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 *) ¤t_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); +} |