1452 lines
37 KiB
C
1452 lines
37 KiB
C
/* Multiple source language support for GDB.
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Copyright 1991, 1992 Free Software Foundation, Inc.
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Contributed by the Department of Computer Science at the State University
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of New York at Buffalo.
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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 functions that return things that are specific
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to languages. Each function should examine current_language if necessary,
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and return the appropriate result. */
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/* FIXME: Most of these would be better organized as macros which
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return data out of a "language-specific" struct pointer that is set
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whenever the working language changes. That would be a lot faster. */
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#include "defs.h"
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#include <ctype.h>
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#include "gdb_string.h"
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#include "symtab.h"
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#include "gdbtypes.h"
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#include "value.h"
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#include "gdbcmd.h"
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#include "frame.h"
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#include "expression.h"
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#include "language.h"
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#include "target.h"
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#include "parser-defs.h"
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static void
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show_language_command PARAMS ((char *, int));
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static void
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set_language_command PARAMS ((char *, int));
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static void
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show_type_command PARAMS ((char *, int));
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static void
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set_type_command PARAMS ((char *, int));
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static void
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show_range_command PARAMS ((char *, int));
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static void
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set_range_command PARAMS ((char *, int));
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static void
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set_range_str PARAMS ((void));
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static void
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set_type_str PARAMS ((void));
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static void
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set_lang_str PARAMS ((void));
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static void
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unk_lang_error PARAMS ((char *));
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static int
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unk_lang_parser PARAMS ((void));
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static void
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show_check PARAMS ((char *, int));
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static void
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set_check PARAMS ((char *, int));
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static void
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set_type_range PARAMS ((void));
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static void
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unk_lang_emit_char PARAMS ((int c, GDB_FILE *stream, int quoter));
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static void
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unk_lang_printchar PARAMS ((int c, GDB_FILE *stream));
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static void
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unk_lang_printstr PARAMS ((GDB_FILE *stream, char *string, unsigned int length, int width, int force_ellipses));
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static struct type *
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unk_lang_create_fundamental_type PARAMS ((struct objfile *, int));
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static void
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unk_lang_print_type PARAMS ((struct type *, char *, GDB_FILE *, int, int));
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static int
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unk_lang_val_print PARAMS ((struct type *, char *, int, CORE_ADDR, GDB_FILE *,
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int, int, int, enum val_prettyprint));
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static int
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unk_lang_value_print PARAMS ((value_ptr, GDB_FILE *, int, enum val_prettyprint));
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/* Forward declaration */
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extern const struct language_defn unknown_language_defn;
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extern char *warning_pre_print;
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/* The current (default at startup) state of type and range checking.
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(If the modes are set to "auto", though, these are changed based
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on the default language at startup, and then again based on the
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language of the first source file. */
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enum range_mode range_mode = range_mode_auto;
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enum range_check range_check = range_check_off;
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enum type_mode type_mode = type_mode_auto;
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enum type_check type_check = type_check_off;
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/* The current language and language_mode (see language.h) */
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const struct language_defn *current_language = &unknown_language_defn;
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enum language_mode language_mode = language_mode_auto;
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/* The language that the user expects to be typing in (the language
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of main(), or the last language we notified them about, or C). */
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const struct language_defn *expected_language;
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/* The list of supported languages. The list itself is malloc'd. */
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static const struct language_defn **languages;
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static unsigned languages_size;
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static unsigned languages_allocsize;
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#define DEFAULT_ALLOCSIZE 4
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/* The "set language/type/range" commands all put stuff in these
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buffers. This is to make them work as set/show commands. The
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user's string is copied here, then the set_* commands look at
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them and update them to something that looks nice when it is
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printed out. */
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static char *language;
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static char *type;
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static char *range;
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/* Warning issued when current_language and the language of the current
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frame do not match. */
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char lang_frame_mismatch_warn[] =
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"Warning: the current language does not match this frame.";
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/* This page contains the functions corresponding to GDB commands
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and their helpers. */
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/* Show command. Display a warning if the language set
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does not match the frame. */
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static void
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show_language_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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enum language flang; /* The language of the current frame */
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flang = get_frame_language();
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if (flang != language_unknown &&
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language_mode == language_mode_manual &&
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current_language->la_language != flang)
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printf_filtered("%s\n",lang_frame_mismatch_warn);
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}
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/* Set command. Change the current working language. */
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static void
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set_language_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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int i;
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enum language flang;
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char *err_lang;
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if (!language || !language[0])
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{
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printf_unfiltered("The currently understood settings are:\n\n");
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printf_unfiltered ("local or auto Automatic setting based on source file\n");
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for (i = 0; i < languages_size; ++i)
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{
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/* Already dealt with these above. */
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if (languages[i]->la_language == language_unknown
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|| languages[i]->la_language == language_auto)
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continue;
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/* FIXME for now assume that the human-readable name is just
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a capitalization of the internal name. */
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printf_unfiltered ("%-16s Use the %c%s language\n",
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languages[i]->la_name,
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/* Capitalize first letter of language
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name. */
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toupper (languages[i]->la_name[0]),
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languages[i]->la_name + 1);
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}
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/* Restore the silly string. */
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set_language(current_language->la_language);
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return;
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}
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/* Search the list of languages for a match. */
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for (i = 0; i < languages_size; i++) {
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if (STREQ (languages[i]->la_name, language)) {
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/* Found it! Go into manual mode, and use this language. */
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if (languages[i]->la_language == language_auto) {
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/* Enter auto mode. Set to the current frame's language, if known. */
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language_mode = language_mode_auto;
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flang = get_frame_language();
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if (flang!=language_unknown)
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set_language(flang);
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expected_language = current_language;
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return;
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} else {
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/* Enter manual mode. Set the specified language. */
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language_mode = language_mode_manual;
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current_language = languages[i];
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set_type_range ();
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set_lang_str();
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expected_language = current_language;
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return;
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}
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}
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}
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/* Reset the language (esp. the global string "language") to the
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correct values. */
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err_lang=savestring(language,strlen(language));
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make_cleanup (free, err_lang); /* Free it after error */
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set_language(current_language->la_language);
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error ("Unknown language `%s'.",err_lang);
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}
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/* Show command. Display a warning if the type setting does
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not match the current language. */
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static void
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show_type_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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if (type_check != current_language->la_type_check)
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printf_unfiltered(
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"Warning: the current type check setting does not match the language.\n");
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}
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/* Set command. Change the setting for type checking. */
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static void
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set_type_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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if (STREQ(type,"on"))
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{
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type_check = type_check_on;
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type_mode = type_mode_manual;
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}
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else if (STREQ(type,"warn"))
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{
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type_check = type_check_warn;
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type_mode = type_mode_manual;
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}
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else if (STREQ(type,"off"))
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{
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type_check = type_check_off;
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type_mode = type_mode_manual;
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}
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else if (STREQ(type,"auto"))
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{
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type_mode = type_mode_auto;
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set_type_range();
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/* Avoid hitting the set_type_str call below. We
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did it in set_type_range. */
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return;
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}
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set_type_str();
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show_type_command((char *)NULL, from_tty);
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}
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/* Show command. Display a warning if the range setting does
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not match the current language. */
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static void
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show_range_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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if (range_check != current_language->la_range_check)
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printf_unfiltered(
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"Warning: the current range check setting does not match the language.\n");
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}
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/* Set command. Change the setting for range checking. */
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static void
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set_range_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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if (STREQ(range,"on"))
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{
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range_check = range_check_on;
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range_mode = range_mode_manual;
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}
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else if (STREQ(range,"warn"))
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{
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range_check = range_check_warn;
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range_mode = range_mode_manual;
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}
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else if (STREQ(range,"off"))
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{
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range_check = range_check_off;
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range_mode = range_mode_manual;
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}
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else if (STREQ(range,"auto"))
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{
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range_mode = range_mode_auto;
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set_type_range();
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/* Avoid hitting the set_range_str call below. We
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did it in set_type_range. */
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return;
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}
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set_range_str();
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show_range_command((char *)0, from_tty);
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}
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/* Set the status of range and type checking based on
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the current modes and the current language.
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If SHOW is non-zero, then print out the current language,
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type and range checking status. */
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static void
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set_type_range()
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{
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if (range_mode == range_mode_auto)
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range_check = current_language->la_range_check;
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if (type_mode == type_mode_auto)
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type_check = current_language->la_type_check;
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set_type_str();
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set_range_str();
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}
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/* Set current language to (enum language) LANG. Returns previous language. */
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enum language
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set_language(lang)
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enum language lang;
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{
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int i;
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enum language prev_language;
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prev_language = current_language->la_language;
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for (i = 0; i < languages_size; i++) {
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if (languages[i]->la_language == lang) {
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current_language = languages[i];
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set_type_range ();
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set_lang_str();
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break;
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}
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}
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return prev_language;
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}
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/* This page contains functions that update the global vars
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language, type and range. */
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static void
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set_lang_str()
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{
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char *prefix = "";
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free (language);
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if (language_mode == language_mode_auto)
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prefix = "auto; currently ";
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language = concat(prefix, current_language->la_name, NULL);
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}
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static void
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set_type_str()
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{
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char *tmp, *prefix = "";
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free (type);
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if (type_mode==type_mode_auto)
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prefix = "auto; currently ";
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switch(type_check)
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{
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case type_check_on:
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tmp = "on";
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break;
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case type_check_off:
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tmp = "off";
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break;
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case type_check_warn:
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tmp = "warn";
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break;
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default:
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error ("Unrecognized type check setting.");
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}
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type = concat(prefix,tmp,NULL);
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}
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static void
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set_range_str()
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{
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char *tmp, *pref = "";
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free (range);
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if (range_mode==range_mode_auto)
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pref = "auto; currently ";
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switch(range_check)
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{
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case range_check_on:
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tmp = "on";
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break;
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case range_check_off:
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tmp = "off";
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break;
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case range_check_warn:
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tmp = "warn";
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break;
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default:
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error ("Unrecognized range check setting.");
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}
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range = concat(pref,tmp,NULL);
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}
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/* Print out the current language settings: language, range and
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type checking. If QUIETLY, print only what has changed. */
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void
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language_info (quietly)
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int quietly;
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{
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if (quietly && expected_language == current_language)
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return;
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expected_language = current_language;
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printf_unfiltered("Current language: %s\n",language);
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show_language_command((char *)0, 1);
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if (!quietly)
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{
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printf_unfiltered("Type checking: %s\n",type);
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show_type_command((char *)0, 1);
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printf_unfiltered("Range checking: %s\n",range);
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show_range_command((char *)0, 1);
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}
|
||
}
|
||
|
||
/* Return the result of a binary operation. */
|
||
|
||
#if 0 /* Currently unused */
|
||
|
||
struct type *
|
||
binop_result_type (v1, v2)
|
||
value_ptr v1, v2;
|
||
{
|
||
int size,uns;
|
||
struct type *t1 = check_typedef (VALUE_TYPE (v1));
|
||
struct type *t2 = check_typedef (VALUE_TYPE (v2));
|
||
|
||
int l1 = TYPE_LENGTH (t1);
|
||
int l2 = TYPE_LENGTH (t2);
|
||
|
||
switch(current_language->la_language)
|
||
{
|
||
case language_c:
|
||
case language_cplus:
|
||
if (TYPE_CODE (t1)==TYPE_CODE_FLT)
|
||
return TYPE_CODE(t2) == TYPE_CODE_FLT && l2 > l1 ?
|
||
VALUE_TYPE(v2) : VALUE_TYPE(v1);
|
||
else if (TYPE_CODE(t2)==TYPE_CODE_FLT)
|
||
return TYPE_CODE(t1)) == TYPE_CODE_FLT && l1 > l2 ?
|
||
VALUE_TYPE(v1) : VALUE_TYPE(v2);
|
||
else if (TYPE_UNSIGNED(t1) && l1 > l2)
|
||
return VALUE_TYPE(v1);
|
||
else if (TYPE_UNSIGNED(t2) && l2 > l1)
|
||
return VALUE_TYPE(v2);
|
||
else /* Both are signed. Result is the longer type */
|
||
return l1 > l2 ? VALUE_TYPE(v1) : VALUE_TYPE(v2);
|
||
break;
|
||
case language_m2:
|
||
/* If we are doing type-checking, l1 should equal l2, so this is
|
||
not needed. */
|
||
return l1 > l2 ? VALUE_TYPE(v1) : VALUE_TYPE(v2);
|
||
break;
|
||
case language_chill:
|
||
error ("Missing Chill support in function binop_result_check.");/*FIXME*/
|
||
}
|
||
abort();
|
||
return (struct type *)0; /* For lint */
|
||
}
|
||
|
||
#endif /* 0 */
|
||
|
||
|
||
/* This page contains functions that return format strings for
|
||
printf for printing out numbers in different formats */
|
||
|
||
/* Returns the appropriate printf format for hexadecimal
|
||
numbers. */
|
||
char *
|
||
local_hex_format_custom(pre)
|
||
char *pre;
|
||
{
|
||
static char form[50];
|
||
|
||
strcpy (form, local_hex_format_prefix ());
|
||
strcat (form, "%");
|
||
strcat (form, pre);
|
||
strcat (form, local_hex_format_specifier ());
|
||
strcat (form, local_hex_format_suffix ());
|
||
return form;
|
||
}
|
||
|
||
/* Converts a number to hexadecimal and stores it in a static
|
||
string. Returns a pointer to this string. */
|
||
char *
|
||
local_hex_string (num)
|
||
unsigned long num;
|
||
{
|
||
static char res[50];
|
||
|
||
sprintf (res, local_hex_format(), num);
|
||
return res;
|
||
}
|
||
|
||
/* Converts a number to custom hexadecimal and stores it in a static
|
||
string. Returns a pointer to this string. */
|
||
char *
|
||
local_hex_string_custom(num,pre)
|
||
unsigned long num;
|
||
char *pre;
|
||
{
|
||
static char res[50];
|
||
|
||
sprintf (res, local_hex_format_custom(pre), num);
|
||
return res;
|
||
}
|
||
|
||
/* Returns the appropriate printf format for octal
|
||
numbers. */
|
||
char *
|
||
local_octal_format_custom(pre)
|
||
char *pre;
|
||
{
|
||
static char form[50];
|
||
|
||
strcpy (form, local_octal_format_prefix ());
|
||
strcat (form, "%");
|
||
strcat (form, pre);
|
||
strcat (form, local_octal_format_specifier ());
|
||
strcat (form, local_octal_format_suffix ());
|
||
return form;
|
||
}
|
||
|
||
/* Returns the appropriate printf format for decimal numbers. */
|
||
char *
|
||
local_decimal_format_custom(pre)
|
||
char *pre;
|
||
{
|
||
static char form[50];
|
||
|
||
strcpy (form, local_decimal_format_prefix ());
|
||
strcat (form, "%");
|
||
strcat (form, pre);
|
||
strcat (form, local_decimal_format_specifier ());
|
||
strcat (form, local_decimal_format_suffix ());
|
||
return form;
|
||
}
|
||
|
||
#if 0
|
||
/* This page contains functions that are used in type/range checking.
|
||
They all return zero if the type/range check fails.
|
||
|
||
It is hoped that these will make extending GDB to parse different
|
||
languages a little easier. These are primarily used in eval.c when
|
||
evaluating expressions and making sure that their types are correct.
|
||
Instead of having a mess of conjucted/disjuncted expressions in an "if",
|
||
the ideas of type can be wrapped up in the following functions.
|
||
|
||
Note that some of them are not currently dependent upon which language
|
||
is currently being parsed. For example, floats are the same in
|
||
C and Modula-2 (ie. the only floating point type has TYPE_CODE of
|
||
TYPE_CODE_FLT), while booleans are different. */
|
||
|
||
/* Returns non-zero if its argument is a simple type. This is the same for
|
||
both Modula-2 and for C. In the C case, TYPE_CODE_CHAR will never occur,
|
||
and thus will never cause the failure of the test. */
|
||
int
|
||
simple_type(type)
|
||
struct type *type;
|
||
{
|
||
CHECK_TYPEDEF (type);
|
||
switch (TYPE_CODE (type)) {
|
||
case TYPE_CODE_INT:
|
||
case TYPE_CODE_CHAR:
|
||
case TYPE_CODE_ENUM:
|
||
case TYPE_CODE_FLT:
|
||
case TYPE_CODE_RANGE:
|
||
case TYPE_CODE_BOOL:
|
||
return 1;
|
||
|
||
default:
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
/* Returns non-zero if its argument is of an ordered type.
|
||
An ordered type is one in which the elements can be tested for the
|
||
properties of "greater than", "less than", etc, or for which the
|
||
operations "increment" or "decrement" make sense. */
|
||
int
|
||
ordered_type (type)
|
||
struct type *type;
|
||
{
|
||
CHECK_TYPEDEF (type);
|
||
switch (TYPE_CODE (type)) {
|
||
case TYPE_CODE_INT:
|
||
case TYPE_CODE_CHAR:
|
||
case TYPE_CODE_ENUM:
|
||
case TYPE_CODE_FLT:
|
||
case TYPE_CODE_RANGE:
|
||
return 1;
|
||
|
||
default:
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
/* Returns non-zero if the two types are the same */
|
||
int
|
||
same_type (arg1, arg2)
|
||
struct type *arg1, *arg2;
|
||
{
|
||
CHECK_TYPEDEF (type);
|
||
if (structured_type(arg1) ? !structured_type(arg2) : structured_type(arg2))
|
||
/* One is structured and one isn't */
|
||
return 0;
|
||
else if (structured_type(arg1) && structured_type(arg2))
|
||
return arg1 == arg2;
|
||
else if (numeric_type(arg1) && numeric_type(arg2))
|
||
return (TYPE_CODE(arg2) == TYPE_CODE(arg1)) &&
|
||
(TYPE_UNSIGNED(arg1) == TYPE_UNSIGNED(arg2))
|
||
? 1 : 0;
|
||
else
|
||
return arg1==arg2;
|
||
}
|
||
|
||
/* Returns non-zero if the type is integral */
|
||
int
|
||
integral_type (type)
|
||
struct type *type;
|
||
{
|
||
CHECK_TYPEDEF (type);
|
||
switch(current_language->la_language)
|
||
{
|
||
case language_c:
|
||
case language_cplus:
|
||
return (TYPE_CODE(type) != TYPE_CODE_INT) &&
|
||
(TYPE_CODE(type) != TYPE_CODE_ENUM) ? 0 : 1;
|
||
case language_m2:
|
||
return TYPE_CODE(type) != TYPE_CODE_INT ? 0 : 1;
|
||
case language_chill:
|
||
error ("Missing Chill support in function integral_type."); /*FIXME*/
|
||
default:
|
||
error ("Language not supported.");
|
||
}
|
||
}
|
||
|
||
/* Returns non-zero if the value is numeric */
|
||
int
|
||
numeric_type (type)
|
||
struct type *type;
|
||
{
|
||
CHECK_TYPEDEF (type);
|
||
switch (TYPE_CODE (type)) {
|
||
case TYPE_CODE_INT:
|
||
case TYPE_CODE_FLT:
|
||
return 1;
|
||
|
||
default:
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
/* Returns non-zero if the value is a character type */
|
||
int
|
||
character_type (type)
|
||
struct type *type;
|
||
{
|
||
CHECK_TYPEDEF (type);
|
||
switch(current_language->la_language)
|
||
{
|
||
case language_chill:
|
||
case language_m2:
|
||
return TYPE_CODE(type) != TYPE_CODE_CHAR ? 0 : 1;
|
||
|
||
case language_c:
|
||
case language_cplus:
|
||
return (TYPE_CODE(type) == TYPE_CODE_INT) &&
|
||
TYPE_LENGTH(type) == sizeof(char)
|
||
? 1 : 0;
|
||
default:
|
||
return (0);
|
||
}
|
||
}
|
||
|
||
/* Returns non-zero if the value is a string type */
|
||
int
|
||
string_type (type)
|
||
struct type *type;
|
||
{
|
||
CHECK_TYPEDEF (type);
|
||
switch(current_language->la_language)
|
||
{
|
||
case language_chill:
|
||
case language_m2:
|
||
return TYPE_CODE(type) != TYPE_CODE_STRING ? 0 : 1;
|
||
|
||
case language_c:
|
||
case language_cplus:
|
||
/* C does not have distinct string type. */
|
||
return (0);
|
||
default:
|
||
return (0);
|
||
}
|
||
}
|
||
|
||
/* Returns non-zero if the value is a boolean type */
|
||
int
|
||
boolean_type (type)
|
||
struct type *type;
|
||
{
|
||
CHECK_TYPEDEF (type);
|
||
if (TYPE_CODE (type) == TYPE_CODE_BOOL)
|
||
return 1;
|
||
switch(current_language->la_language)
|
||
{
|
||
case language_c:
|
||
case language_cplus:
|
||
/* Might be more cleanly handled by having a TYPE_CODE_INT_NOT_BOOL
|
||
for CHILL and such languages, or a TYPE_CODE_INT_OR_BOOL for C. */
|
||
if (TYPE_CODE (type) == TYPE_CODE_INT)
|
||
return 1;
|
||
default:
|
||
break;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/* Returns non-zero if the value is a floating-point type */
|
||
int
|
||
float_type (type)
|
||
struct type *type;
|
||
{
|
||
CHECK_TYPEDEF (type);
|
||
return TYPE_CODE(type) == TYPE_CODE_FLT;
|
||
}
|
||
|
||
/* Returns non-zero if the value is a pointer type */
|
||
int
|
||
pointer_type(type)
|
||
struct type *type;
|
||
{
|
||
return TYPE_CODE(type) == TYPE_CODE_PTR ||
|
||
TYPE_CODE(type) == TYPE_CODE_REF;
|
||
}
|
||
|
||
/* Returns non-zero if the value is a structured type */
|
||
int
|
||
structured_type(type)
|
||
struct type *type;
|
||
{
|
||
CHECK_TYPEDEF (type);
|
||
switch(current_language->la_language)
|
||
{
|
||
case language_c:
|
||
case language_cplus:
|
||
return (TYPE_CODE(type) == TYPE_CODE_STRUCT) ||
|
||
(TYPE_CODE(type) == TYPE_CODE_UNION) ||
|
||
(TYPE_CODE(type) == TYPE_CODE_ARRAY);
|
||
case language_m2:
|
||
return (TYPE_CODE(type) == TYPE_CODE_STRUCT) ||
|
||
(TYPE_CODE(type) == TYPE_CODE_SET) ||
|
||
(TYPE_CODE(type) == TYPE_CODE_ARRAY);
|
||
case language_chill:
|
||
error ("Missing Chill support in function structured_type."); /*FIXME*/
|
||
default:
|
||
return (0);
|
||
}
|
||
}
|
||
#endif
|
||
|
||
struct type *
|
||
lang_bool_type ()
|
||
{
|
||
struct symbol *sym;
|
||
struct type *type;
|
||
switch(current_language->la_language)
|
||
{
|
||
case language_chill:
|
||
return builtin_type_chill_bool;
|
||
case language_fortran:
|
||
sym = lookup_symbol ("logical", NULL, VAR_NAMESPACE, NULL, NULL);
|
||
if (sym)
|
||
{
|
||
type = SYMBOL_TYPE (sym);
|
||
if (type && TYPE_CODE (type) == TYPE_CODE_BOOL)
|
||
return type;
|
||
}
|
||
return builtin_type_f_logical_s2;
|
||
case language_cplus:
|
||
sym = lookup_symbol ("bool", NULL, VAR_NAMESPACE, NULL, NULL);
|
||
if (sym)
|
||
{
|
||
type = SYMBOL_TYPE (sym);
|
||
if (type && TYPE_CODE (type) == TYPE_CODE_BOOL)
|
||
return type;
|
||
}
|
||
return builtin_type_bool;
|
||
default:
|
||
return builtin_type_int;
|
||
}
|
||
}
|
||
|
||
/* This page contains functions that return info about
|
||
(struct value) values used in GDB. */
|
||
|
||
/* Returns non-zero if the value VAL represents a true value. */
|
||
int
|
||
value_true (val)
|
||
value_ptr val;
|
||
{
|
||
/* It is possible that we should have some sort of error if a non-boolean
|
||
value is used in this context. Possibly dependent on some kind of
|
||
"boolean-checking" option like range checking. But it should probably
|
||
not depend on the language except insofar as is necessary to identify
|
||
a "boolean" value (i.e. in C using a float, pointer, etc., as a boolean
|
||
should be an error, probably). */
|
||
return !value_logical_not (val);
|
||
}
|
||
|
||
/* Returns non-zero if the operator OP is defined on
|
||
the values ARG1 and ARG2. */
|
||
|
||
#if 0 /* Currently unused */
|
||
|
||
void
|
||
binop_type_check(arg1,arg2,op)
|
||
value_ptr arg1,arg2;
|
||
int op;
|
||
{
|
||
struct type *t1, *t2;
|
||
|
||
/* If we're not checking types, always return success. */
|
||
if (!STRICT_TYPE)
|
||
return;
|
||
|
||
t1=VALUE_TYPE(arg1);
|
||
if (arg2 != NULL)
|
||
t2=VALUE_TYPE(arg2);
|
||
else
|
||
t2=NULL;
|
||
|
||
switch(op)
|
||
{
|
||
case BINOP_ADD:
|
||
case BINOP_SUB:
|
||
if ((numeric_type(t1) && pointer_type(t2)) ||
|
||
(pointer_type(t1) && numeric_type(t2)))
|
||
{
|
||
warning ("combining pointer and integer.\n");
|
||
break;
|
||
}
|
||
case BINOP_MUL:
|
||
case BINOP_LSH:
|
||
case BINOP_RSH:
|
||
if (!numeric_type(t1) || !numeric_type(t2))
|
||
type_op_error ("Arguments to %s must be numbers.",op);
|
||
else if (!same_type(t1,t2))
|
||
type_op_error ("Arguments to %s must be of the same type.",op);
|
||
break;
|
||
|
||
case BINOP_LOGICAL_AND:
|
||
case BINOP_LOGICAL_OR:
|
||
if (!boolean_type(t1) || !boolean_type(t2))
|
||
type_op_error ("Arguments to %s must be of boolean type.",op);
|
||
break;
|
||
|
||
case BINOP_EQUAL:
|
||
if ((pointer_type(t1) && !(pointer_type(t2) || integral_type(t2))) ||
|
||
(pointer_type(t2) && !(pointer_type(t1) || integral_type(t1))))
|
||
type_op_error ("A pointer can only be compared to an integer or pointer.",op);
|
||
else if ((pointer_type(t1) && integral_type(t2)) ||
|
||
(integral_type(t1) && pointer_type(t2)))
|
||
{
|
||
warning ("combining integer and pointer.\n");
|
||
break;
|
||
}
|
||
else if (!simple_type(t1) || !simple_type(t2))
|
||
type_op_error ("Arguments to %s must be of simple type.",op);
|
||
else if (!same_type(t1,t2))
|
||
type_op_error ("Arguments to %s must be of the same type.",op);
|
||
break;
|
||
|
||
case BINOP_REM:
|
||
case BINOP_MOD:
|
||
if (!integral_type(t1) || !integral_type(t2))
|
||
type_op_error ("Arguments to %s must be of integral type.",op);
|
||
break;
|
||
|
||
case BINOP_LESS:
|
||
case BINOP_GTR:
|
||
case BINOP_LEQ:
|
||
case BINOP_GEQ:
|
||
if (!ordered_type(t1) || !ordered_type(t2))
|
||
type_op_error ("Arguments to %s must be of ordered type.",op);
|
||
else if (!same_type(t1,t2))
|
||
type_op_error ("Arguments to %s must be of the same type.",op);
|
||
break;
|
||
|
||
case BINOP_ASSIGN:
|
||
if (pointer_type(t1) && !integral_type(t2))
|
||
type_op_error ("A pointer can only be assigned an integer.",op);
|
||
else if (pointer_type(t1) && integral_type(t2))
|
||
{
|
||
warning ("combining integer and pointer.");
|
||
break;
|
||
}
|
||
else if (!simple_type(t1) || !simple_type(t2))
|
||
type_op_error ("Arguments to %s must be of simple type.",op);
|
||
else if (!same_type(t1,t2))
|
||
type_op_error ("Arguments to %s must be of the same type.",op);
|
||
break;
|
||
|
||
case BINOP_CONCAT:
|
||
/* FIXME: Needs to handle bitstrings as well. */
|
||
if (!(string_type(t1) || character_type(t1) || integral_type(t1))
|
||
|| !(string_type(t2) || character_type(t2) || integral_type(t2)))
|
||
type_op_error ("Arguments to %s must be strings or characters.", op);
|
||
break;
|
||
|
||
/* Unary checks -- arg2 is null */
|
||
|
||
case UNOP_LOGICAL_NOT:
|
||
if (!boolean_type(t1))
|
||
type_op_error ("Argument to %s must be of boolean type.",op);
|
||
break;
|
||
|
||
case UNOP_PLUS:
|
||
case UNOP_NEG:
|
||
if (!numeric_type(t1))
|
||
type_op_error ("Argument to %s must be of numeric type.",op);
|
||
break;
|
||
|
||
case UNOP_IND:
|
||
if (integral_type(t1))
|
||
{
|
||
warning ("combining pointer and integer.\n");
|
||
break;
|
||
}
|
||
else if (!pointer_type(t1))
|
||
type_op_error ("Argument to %s must be a pointer.",op);
|
||
break;
|
||
|
||
case UNOP_PREINCREMENT:
|
||
case UNOP_POSTINCREMENT:
|
||
case UNOP_PREDECREMENT:
|
||
case UNOP_POSTDECREMENT:
|
||
if (!ordered_type(t1))
|
||
type_op_error ("Argument to %s must be of an ordered type.",op);
|
||
break;
|
||
|
||
default:
|
||
/* Ok. The following operators have different meanings in
|
||
different languages. */
|
||
switch(current_language->la_language)
|
||
{
|
||
#ifdef _LANG_c
|
||
case language_c:
|
||
case language_cplus:
|
||
switch(op)
|
||
{
|
||
case BINOP_DIV:
|
||
if (!numeric_type(t1) || !numeric_type(t2))
|
||
type_op_error ("Arguments to %s must be numbers.",op);
|
||
break;
|
||
}
|
||
break;
|
||
#endif
|
||
|
||
#ifdef _LANG_m2
|
||
case language_m2:
|
||
switch(op)
|
||
{
|
||
case BINOP_DIV:
|
||
if (!float_type(t1) || !float_type(t2))
|
||
type_op_error ("Arguments to %s must be floating point numbers.",op);
|
||
break;
|
||
case BINOP_INTDIV:
|
||
if (!integral_type(t1) || !integral_type(t2))
|
||
type_op_error ("Arguments to %s must be of integral type.",op);
|
||
break;
|
||
}
|
||
#endif
|
||
|
||
#ifdef _LANG_chill
|
||
case language_chill:
|
||
error ("Missing Chill support in function binop_type_check.");/*FIXME*/
|
||
#endif
|
||
|
||
}
|
||
}
|
||
}
|
||
|
||
#endif /* 0 */
|
||
|
||
|
||
/* This page contains functions for the printing out of
|
||
error messages that occur during type- and range-
|
||
checking. */
|
||
|
||
/* Prints the format string FMT with the operator as a string
|
||
corresponding to the opcode OP. If FATAL is non-zero, then
|
||
this is an error and error () is called. Otherwise, it is
|
||
a warning and printf() is called. */
|
||
void
|
||
op_error (fmt,op,fatal)
|
||
char *fmt;
|
||
enum exp_opcode op;
|
||
int fatal;
|
||
{
|
||
if (fatal)
|
||
error (fmt,op_string(op));
|
||
else
|
||
{
|
||
warning (fmt,op_string(op));
|
||
}
|
||
}
|
||
|
||
/* These are called when a language fails a type- or range-check.
|
||
The first argument should be a printf()-style format string, and
|
||
the rest of the arguments should be its arguments. If
|
||
[type|range]_check is [type|range]_check_on, then return_to_top_level()
|
||
is called in the style of error (). Otherwise, the message is prefixed
|
||
by the value of warning_pre_print and we do not return to the top level. */
|
||
|
||
void
|
||
#ifdef ANSI_PROTOTYPES
|
||
type_error (char *string, ...)
|
||
#else
|
||
type_error (va_alist)
|
||
va_dcl
|
||
#endif
|
||
{
|
||
va_list args;
|
||
#ifdef ANSI_PROTOTYPES
|
||
va_start (args, string);
|
||
#else
|
||
char *string;
|
||
va_start (args);
|
||
string = va_arg (args, char *);
|
||
#endif
|
||
|
||
if (type_check == type_check_warn)
|
||
fprintf_filtered (gdb_stderr, warning_pre_print);
|
||
else
|
||
error_begin ();
|
||
|
||
vfprintf_filtered (gdb_stderr, string, args);
|
||
fprintf_filtered (gdb_stderr, "\n");
|
||
va_end (args);
|
||
if (type_check == type_check_on)
|
||
return_to_top_level (RETURN_ERROR);
|
||
}
|
||
|
||
void
|
||
#ifdef ANSI_PROTOTYPES
|
||
range_error (char *string, ...)
|
||
#else
|
||
range_error (va_alist)
|
||
va_dcl
|
||
#endif
|
||
{
|
||
va_list args;
|
||
#ifdef ANSI_PROTOTYPES
|
||
va_start (args, string);
|
||
#else
|
||
char *string;
|
||
va_start (args);
|
||
string = va_arg (args, char *);
|
||
#endif
|
||
|
||
if (range_check == range_check_warn)
|
||
fprintf_filtered (gdb_stderr, warning_pre_print);
|
||
else
|
||
error_begin ();
|
||
|
||
vfprintf_filtered (gdb_stderr, string, args);
|
||
fprintf_filtered (gdb_stderr, "\n");
|
||
va_end (args);
|
||
if (range_check == range_check_on)
|
||
return_to_top_level (RETURN_ERROR);
|
||
}
|
||
|
||
|
||
/* This page contains miscellaneous functions */
|
||
|
||
/* Return the language enum for a given language string. */
|
||
|
||
enum language
|
||
language_enum (str)
|
||
char *str;
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; i < languages_size; i++)
|
||
if (STREQ (languages[i]->la_name, str))
|
||
return languages[i]->la_language;
|
||
|
||
return language_unknown;
|
||
}
|
||
|
||
/* Return the language struct for a given language enum. */
|
||
|
||
const struct language_defn *
|
||
language_def(lang)
|
||
enum language lang;
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; i < languages_size; i++) {
|
||
if (languages[i]->la_language == lang) {
|
||
return languages[i];
|
||
}
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
/* Return the language as a string */
|
||
char *
|
||
language_str(lang)
|
||
enum language lang;
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; i < languages_size; i++) {
|
||
if (languages[i]->la_language == lang) {
|
||
return languages[i]->la_name;
|
||
}
|
||
}
|
||
return "Unknown";
|
||
}
|
||
|
||
static void
|
||
set_check (ignore, from_tty)
|
||
char *ignore;
|
||
int from_tty;
|
||
{
|
||
printf_unfiltered(
|
||
"\"set check\" must be followed by the name of a check subcommand.\n");
|
||
help_list(setchecklist, "set check ", -1, gdb_stdout);
|
||
}
|
||
|
||
static void
|
||
show_check (ignore, from_tty)
|
||
char *ignore;
|
||
int from_tty;
|
||
{
|
||
cmd_show_list(showchecklist, from_tty, "");
|
||
}
|
||
|
||
/* Add a language to the set of known languages. */
|
||
|
||
void
|
||
add_language (lang)
|
||
const struct language_defn *lang;
|
||
{
|
||
if (lang->la_magic != LANG_MAGIC)
|
||
{
|
||
fprintf_unfiltered(gdb_stderr, "Magic number of %s language struct wrong\n",
|
||
lang->la_name);
|
||
abort();
|
||
}
|
||
|
||
if (!languages)
|
||
{
|
||
languages_allocsize = DEFAULT_ALLOCSIZE;
|
||
languages = (const struct language_defn **) xmalloc
|
||
(languages_allocsize * sizeof (*languages));
|
||
}
|
||
if (languages_size >= languages_allocsize)
|
||
{
|
||
languages_allocsize *= 2;
|
||
languages = (const struct language_defn **) xrealloc ((char *) languages,
|
||
languages_allocsize * sizeof (*languages));
|
||
}
|
||
languages[languages_size++] = lang;
|
||
}
|
||
|
||
/* Define the language that is no language. */
|
||
|
||
static int
|
||
unk_lang_parser ()
|
||
{
|
||
return 1;
|
||
}
|
||
|
||
static void
|
||
unk_lang_error (msg)
|
||
char *msg;
|
||
{
|
||
error ("Attempted to parse an expression with unknown language");
|
||
}
|
||
|
||
static void
|
||
unk_lang_emit_char (c, stream, quoter)
|
||
register int c;
|
||
GDB_FILE *stream;
|
||
int quoter;
|
||
{
|
||
error ("internal error - unimplemented function unk_lang_emit_char called.");
|
||
}
|
||
|
||
static void
|
||
unk_lang_printchar (c, stream)
|
||
register int c;
|
||
GDB_FILE *stream;
|
||
{
|
||
error ("internal error - unimplemented function unk_lang_printchar called.");
|
||
}
|
||
|
||
static void
|
||
unk_lang_printstr (stream, string, length, width, force_ellipses)
|
||
GDB_FILE *stream;
|
||
char *string;
|
||
unsigned int length;
|
||
int width;
|
||
int force_ellipses;
|
||
{
|
||
error ("internal error - unimplemented function unk_lang_printstr called.");
|
||
}
|
||
|
||
static struct type *
|
||
unk_lang_create_fundamental_type (objfile, typeid)
|
||
struct objfile *objfile;
|
||
int typeid;
|
||
{
|
||
error ("internal error - unimplemented function unk_lang_create_fundamental_type called.");
|
||
}
|
||
|
||
static void
|
||
unk_lang_print_type (type, varstring, stream, show, level)
|
||
struct type *type;
|
||
char *varstring;
|
||
GDB_FILE *stream;
|
||
int show;
|
||
int level;
|
||
{
|
||
error ("internal error - unimplemented function unk_lang_print_type called.");
|
||
}
|
||
|
||
static int
|
||
unk_lang_val_print (type, valaddr, embedded_offset, address, stream, format, deref_ref,
|
||
recurse, pretty)
|
||
struct type *type;
|
||
char *valaddr;
|
||
int embedded_offset;
|
||
CORE_ADDR address;
|
||
GDB_FILE *stream;
|
||
int format;
|
||
int deref_ref;
|
||
int recurse;
|
||
enum val_prettyprint pretty;
|
||
{
|
||
error ("internal error - unimplemented function unk_lang_val_print called.");
|
||
}
|
||
|
||
static int
|
||
unk_lang_value_print (val, stream, format, pretty)
|
||
value_ptr val;
|
||
GDB_FILE *stream;
|
||
int format;
|
||
enum val_prettyprint pretty;
|
||
{
|
||
error ("internal error - unimplemented function unk_lang_value_print called.");
|
||
}
|
||
|
||
static struct type ** CONST_PTR (unknown_builtin_types[]) = { 0 };
|
||
static const struct op_print unk_op_print_tab[] = {
|
||
{NULL, OP_NULL, PREC_NULL, 0}
|
||
};
|
||
|
||
const struct language_defn unknown_language_defn = {
|
||
"unknown",
|
||
language_unknown,
|
||
&unknown_builtin_types[0],
|
||
range_check_off,
|
||
type_check_off,
|
||
unk_lang_parser,
|
||
unk_lang_error,
|
||
evaluate_subexp_standard,
|
||
unk_lang_printchar, /* Print character constant */
|
||
unk_lang_printstr,
|
||
unk_lang_emit_char,
|
||
unk_lang_create_fundamental_type,
|
||
unk_lang_print_type, /* Print a type using appropriate syntax */
|
||
unk_lang_val_print, /* Print a value using appropriate syntax */
|
||
unk_lang_value_print, /* Print a top-level value */
|
||
{"", "", "", ""}, /* Binary format info */
|
||
{"0%lo", "0", "o", ""}, /* Octal format info */
|
||
{"%ld", "", "d", ""}, /* Decimal format info */
|
||
{"0x%lx", "0x", "x", ""}, /* Hex format info */
|
||
unk_op_print_tab, /* expression operators for printing */
|
||
1, /* c-style arrays */
|
||
0, /* String lower bound */
|
||
&builtin_type_char, /* Type of string elements */
|
||
LANG_MAGIC
|
||
};
|
||
|
||
/* These two structs define fake entries for the "local" and "auto" options. */
|
||
const struct language_defn auto_language_defn = {
|
||
"auto",
|
||
language_auto,
|
||
&unknown_builtin_types[0],
|
||
range_check_off,
|
||
type_check_off,
|
||
unk_lang_parser,
|
||
unk_lang_error,
|
||
evaluate_subexp_standard,
|
||
unk_lang_printchar, /* Print character constant */
|
||
unk_lang_printstr,
|
||
unk_lang_emit_char,
|
||
unk_lang_create_fundamental_type,
|
||
unk_lang_print_type, /* Print a type using appropriate syntax */
|
||
unk_lang_val_print, /* Print a value using appropriate syntax */
|
||
unk_lang_value_print, /* Print a top-level value */
|
||
{"", "", "", ""}, /* Binary format info */
|
||
{"0%lo", "0", "o", ""}, /* Octal format info */
|
||
{"%ld", "", "d", ""}, /* Decimal format info */
|
||
{"0x%lx", "0x", "x", ""}, /* Hex format info */
|
||
unk_op_print_tab, /* expression operators for printing */
|
||
1, /* c-style arrays */
|
||
0, /* String lower bound */
|
||
&builtin_type_char, /* Type of string elements */
|
||
LANG_MAGIC
|
||
};
|
||
|
||
const struct language_defn local_language_defn = {
|
||
"local",
|
||
language_auto,
|
||
&unknown_builtin_types[0],
|
||
range_check_off,
|
||
type_check_off,
|
||
unk_lang_parser,
|
||
unk_lang_error,
|
||
evaluate_subexp_standard,
|
||
unk_lang_printchar, /* Print character constant */
|
||
unk_lang_printstr,
|
||
unk_lang_emit_char,
|
||
unk_lang_create_fundamental_type,
|
||
unk_lang_print_type, /* Print a type using appropriate syntax */
|
||
unk_lang_val_print, /* Print a value using appropriate syntax */
|
||
unk_lang_value_print, /* Print a top-level value */
|
||
{"", "", "", ""}, /* Binary format info */
|
||
{"0%lo", "0", "o", ""}, /* Octal format info */
|
||
{"%ld", "", "d", ""}, /* Decimal format info */
|
||
{"0x%lx", "0x", "x", ""}, /* Hex format info */
|
||
unk_op_print_tab, /* expression operators for printing */
|
||
1, /* c-style arrays */
|
||
0, /* String lower bound */
|
||
&builtin_type_char, /* Type of string elements */
|
||
LANG_MAGIC
|
||
};
|
||
|
||
/* Initialize the language routines */
|
||
|
||
void
|
||
_initialize_language()
|
||
{
|
||
struct cmd_list_element *set, *show;
|
||
|
||
/* GDB commands for language specific stuff */
|
||
|
||
set = add_set_cmd ("language", class_support, var_string_noescape,
|
||
(char *)&language,
|
||
"Set the current source language.",
|
||
&setlist);
|
||
show = add_show_from_set (set, &showlist);
|
||
set->function.cfunc = set_language_command;
|
||
show->function.cfunc = show_language_command;
|
||
|
||
add_prefix_cmd ("check", no_class, set_check,
|
||
"Set the status of the type/range checker",
|
||
&setchecklist, "set check ", 0, &setlist);
|
||
add_alias_cmd ("c", "check", no_class, 1, &setlist);
|
||
add_alias_cmd ("ch", "check", no_class, 1, &setlist);
|
||
|
||
add_prefix_cmd ("check", no_class, show_check,
|
||
"Show the status of the type/range checker",
|
||
&showchecklist, "show check ", 0, &showlist);
|
||
add_alias_cmd ("c", "check", no_class, 1, &showlist);
|
||
add_alias_cmd ("ch", "check", no_class, 1, &showlist);
|
||
|
||
set = add_set_cmd ("type", class_support, var_string_noescape,
|
||
(char *)&type,
|
||
"Set type checking. (on/warn/off/auto)",
|
||
&setchecklist);
|
||
show = add_show_from_set (set, &showchecklist);
|
||
set->function.cfunc = set_type_command;
|
||
show->function.cfunc = show_type_command;
|
||
|
||
set = add_set_cmd ("range", class_support, var_string_noescape,
|
||
(char *)&range,
|
||
"Set range checking. (on/warn/off/auto)",
|
||
&setchecklist);
|
||
show = add_show_from_set (set, &showchecklist);
|
||
set->function.cfunc = set_range_command;
|
||
show->function.cfunc = show_range_command;
|
||
|
||
add_language (&unknown_language_defn);
|
||
add_language (&local_language_defn);
|
||
add_language (&auto_language_defn);
|
||
|
||
language = savestring ("auto",strlen("auto"));
|
||
range = savestring ("auto",strlen("auto"));
|
||
type = savestring ("auto",strlen("auto"));
|
||
|
||
/* Have the above take effect */
|
||
|
||
set_language_command (language, 0);
|
||
set_type_command (NULL, 0);
|
||
set_range_command (NULL, 0);
|
||
}
|