1 /* Multiple source language support for GDB.
3 Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
4 2002, 2003, 2004, 2005, 2007, 2008 Free Software Foundation, Inc.
6 Contributed by the Department of Computer Science at the State University
7 of New York at Buffalo.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 /* This file contains functions that return things that are specific
25 to languages. Each function should examine current_language if necessary,
26 and return the appropriate result. */
28 /* FIXME: Most of these would be better organized as macros which
29 return data out of a "language-specific" struct pointer that is set
30 whenever the working language changes. That would be a lot faster. */
34 #include "gdb_string.h"
40 #include "expression.h"
43 #include "parser-defs.h"
48 extern void _initialize_language (void);
50 static void set_case_str (void);
52 static void set_range_str (void);
54 static void set_type_str (void);
56 static void set_lang_str (void);
58 static void unk_lang_error (char *);
60 static int unk_lang_parser (void);
62 static void show_check (char *, int);
64 static void set_check (char *, int);
66 static void set_type_range_case (void);
68 static void unk_lang_emit_char (int c, struct ui_file *stream, int quoter);
70 static void unk_lang_printchar (int c, struct ui_file *stream);
72 static void unk_lang_print_type (struct type *, char *, struct ui_file *,
75 static int unk_lang_value_print (struct value *, struct ui_file *, int, enum val_prettyprint);
77 static CORE_ADDR unk_lang_trampoline (struct frame_info *, CORE_ADDR pc);
79 /* Forward declaration */
80 extern const struct language_defn unknown_language_defn;
82 /* The current (default at startup) state of type and range checking.
83 (If the modes are set to "auto", though, these are changed based
84 on the default language at startup, and then again based on the
85 language of the first source file. */
87 enum range_mode range_mode = range_mode_auto;
88 enum range_check range_check = range_check_off;
89 enum type_mode type_mode = type_mode_auto;
90 enum type_check type_check = type_check_off;
91 enum case_mode case_mode = case_mode_auto;
92 enum case_sensitivity case_sensitivity = case_sensitive_on;
94 /* The current language and language_mode (see language.h) */
96 const struct language_defn *current_language = &unknown_language_defn;
97 enum language_mode language_mode = language_mode_auto;
99 /* The language that the user expects to be typing in (the language
100 of main(), or the last language we notified them about, or C). */
102 const struct language_defn *expected_language;
104 /* The list of supported languages. The list itself is malloc'd. */
106 static const struct language_defn **languages;
107 static unsigned languages_size;
108 static unsigned languages_allocsize;
109 #define DEFAULT_ALLOCSIZE 4
111 /* The "set language/type/range" commands all put stuff in these
112 buffers. This is to make them work as set/show commands. The
113 user's string is copied here, then the set_* commands look at
114 them and update them to something that looks nice when it is
117 static char *language;
120 static char *case_sensitive;
122 /* Warning issued when current_language and the language of the current
123 frame do not match. */
124 char lang_frame_mismatch_warn[] =
125 "Warning: the current language does not match this frame.";
127 /* This page contains the functions corresponding to GDB commands
128 and their helpers. */
130 /* Show command. Display a warning if the language set
131 does not match the frame. */
133 show_language_command (struct ui_file *file, int from_tty,
134 struct cmd_list_element *c, const char *value)
136 enum language flang; /* The language of the current frame */
138 deprecated_show_value_hack (file, from_tty, c, value);
139 flang = get_frame_language ();
140 if (flang != language_unknown &&
141 language_mode == language_mode_manual &&
142 current_language->la_language != flang)
143 printf_filtered ("%s\n", lang_frame_mismatch_warn);
146 /* Set command. Change the current working language. */
148 set_language_command (char *ignore, int from_tty, struct cmd_list_element *c)
154 if (!language || !language[0])
156 printf_unfiltered (_("\
157 The currently understood settings are:\n\n\
158 local or auto Automatic setting based on source file\n"));
160 for (i = 0; i < languages_size; ++i)
162 /* Already dealt with these above. */
163 if (languages[i]->la_language == language_unknown
164 || languages[i]->la_language == language_auto)
167 /* FIXME: i18n: for now assume that the human-readable name
168 is just a capitalization of the internal name. */
169 printf_unfiltered ("%-16s Use the %c%s language\n",
170 languages[i]->la_name,
171 /* Capitalize first letter of language
173 toupper (languages[i]->la_name[0]),
174 languages[i]->la_name + 1);
176 /* Restore the silly string. */
177 set_language (current_language->la_language);
181 /* Search the list of languages for a match. */
182 for (i = 0; i < languages_size; i++)
184 if (strcmp (languages[i]->la_name, language) == 0)
186 /* Found it! Go into manual mode, and use this language. */
187 if (languages[i]->la_language == language_auto)
189 /* Enter auto mode. Set to the current frame's language, if
190 known, or fallback to the initial language. */
191 language_mode = language_mode_auto;
192 flang = get_frame_language ();
193 if (flang != language_unknown)
194 set_language (flang);
196 set_initial_language ();
197 expected_language = current_language;
202 /* Enter manual mode. Set the specified language. */
203 language_mode = language_mode_manual;
204 current_language = languages[i];
205 set_type_range_case ();
207 expected_language = current_language;
213 /* Reset the language (esp. the global string "language") to the
215 err_lang = savestring (language, strlen (language));
216 make_cleanup (xfree, err_lang); /* Free it after error */
217 set_language (current_language->la_language);
218 error (_("Unknown language `%s'."), err_lang);
221 /* Show command. Display a warning if the type setting does
222 not match the current language. */
224 show_type_command (struct ui_file *file, int from_tty,
225 struct cmd_list_element *c, const char *value)
227 deprecated_show_value_hack (file, from_tty, c, value);
228 if (type_check != current_language->la_type_check)
230 "Warning: the current type check setting does not match the language.\n");
233 /* Set command. Change the setting for type checking. */
235 set_type_command (char *ignore, int from_tty, struct cmd_list_element *c)
237 if (strcmp (type, "on") == 0)
239 type_check = type_check_on;
240 type_mode = type_mode_manual;
242 else if (strcmp (type, "warn") == 0)
244 type_check = type_check_warn;
245 type_mode = type_mode_manual;
247 else if (strcmp (type, "off") == 0)
249 type_check = type_check_off;
250 type_mode = type_mode_manual;
252 else if (strcmp (type, "auto") == 0)
254 type_mode = type_mode_auto;
255 set_type_range_case ();
256 /* Avoid hitting the set_type_str call below. We
257 did it in set_type_range_case. */
262 warning (_("Unrecognized type check setting: \"%s\""), type);
265 show_type_command (NULL, from_tty, NULL, NULL);
268 /* Show command. Display a warning if the range setting does
269 not match the current language. */
271 show_range_command (struct ui_file *file, int from_tty,
272 struct cmd_list_element *c, const char *value)
274 deprecated_show_value_hack (file, from_tty, c, value);
275 if (range_check != current_language->la_range_check)
277 "Warning: the current range check setting does not match the language.\n");
280 /* Set command. Change the setting for range checking. */
282 set_range_command (char *ignore, int from_tty, struct cmd_list_element *c)
284 if (strcmp (range, "on") == 0)
286 range_check = range_check_on;
287 range_mode = range_mode_manual;
289 else if (strcmp (range, "warn") == 0)
291 range_check = range_check_warn;
292 range_mode = range_mode_manual;
294 else if (strcmp (range, "off") == 0)
296 range_check = range_check_off;
297 range_mode = range_mode_manual;
299 else if (strcmp (range, "auto") == 0)
301 range_mode = range_mode_auto;
302 set_type_range_case ();
303 /* Avoid hitting the set_range_str call below. We
304 did it in set_type_range_case. */
309 warning (_("Unrecognized range check setting: \"%s\""), range);
312 show_range_command (NULL, from_tty, NULL, NULL);
315 /* Show command. Display a warning if the case sensitivity setting does
316 not match the current language. */
318 show_case_command (struct ui_file *file, int from_tty,
319 struct cmd_list_element *c, const char *value)
321 deprecated_show_value_hack (file, from_tty, c, value);
322 if (case_sensitivity != current_language->la_case_sensitivity)
324 "Warning: the current case sensitivity setting does not match the language.\n");
327 /* Set command. Change the setting for case sensitivity. */
330 set_case_command (char *ignore, int from_tty, struct cmd_list_element *c)
332 if (strcmp (case_sensitive, "on") == 0)
334 case_sensitivity = case_sensitive_on;
335 case_mode = case_mode_manual;
337 else if (strcmp (case_sensitive, "off") == 0)
339 case_sensitivity = case_sensitive_off;
340 case_mode = case_mode_manual;
342 else if (strcmp (case_sensitive, "auto") == 0)
344 case_mode = case_mode_auto;
345 set_type_range_case ();
346 /* Avoid hitting the set_case_str call below. We did it in
347 set_type_range_case. */
352 warning (_("Unrecognized case-sensitive setting: \"%s\""),
356 show_case_command (NULL, from_tty, NULL, NULL);
359 /* Set the status of range and type checking and case sensitivity based on
360 the current modes and the current language.
361 If SHOW is non-zero, then print out the current language,
362 type and range checking status. */
364 set_type_range_case (void)
367 if (range_mode == range_mode_auto)
368 range_check = current_language->la_range_check;
370 if (type_mode == type_mode_auto)
371 type_check = current_language->la_type_check;
373 if (case_mode == case_mode_auto)
374 case_sensitivity = current_language->la_case_sensitivity;
381 /* Set current language to (enum language) LANG. Returns previous language. */
384 set_language (enum language lang)
387 enum language prev_language;
389 prev_language = current_language->la_language;
391 for (i = 0; i < languages_size; i++)
393 if (languages[i]->la_language == lang)
395 current_language = languages[i];
396 set_type_range_case ();
402 return prev_language;
405 /* This page contains functions that update the global vars
406 language, type and range. */
414 if (language_mode == language_mode_auto)
415 prefix = "auto; currently ";
417 language = concat (prefix, current_language->la_name, (char *)NULL);
423 char *tmp = NULL, *prefix = "";
427 if (type_mode == type_mode_auto)
428 prefix = "auto; currently ";
438 case type_check_warn:
442 error (_("Unrecognized type check setting."));
445 type = concat (prefix, tmp, (char *)NULL);
451 char *tmp, *pref = "";
453 if (range_mode == range_mode_auto)
454 pref = "auto; currently ";
461 case range_check_off:
464 case range_check_warn:
468 error (_("Unrecognized range check setting."));
473 range = concat (pref, tmp, (char *)NULL);
479 char *tmp = NULL, *prefix = "";
481 if (case_mode==case_mode_auto)
482 prefix = "auto; currently ";
484 switch (case_sensitivity)
486 case case_sensitive_on:
489 case case_sensitive_off:
493 error (_("Unrecognized case-sensitive setting."));
496 xfree (case_sensitive);
497 case_sensitive = concat (prefix, tmp, (char *)NULL);
500 /* Print out the current language settings: language, range and
501 type checking. If QUIETLY, print only what has changed. */
504 language_info (int quietly)
506 if (quietly && expected_language == current_language)
509 expected_language = current_language;
510 printf_unfiltered (_("Current language: %s\n"), language);
511 show_language_command (NULL, 1, NULL, NULL);
515 printf_unfiltered (_("Type checking: %s\n"), type);
516 show_type_command (NULL, 1, NULL, NULL);
517 printf_unfiltered (_("Range checking: %s\n"), range);
518 show_range_command (NULL, 1, NULL, NULL);
519 printf_unfiltered (_("Case sensitivity: %s\n"), case_sensitive);
520 show_case_command (NULL, 1, NULL, NULL);
524 /* Return the result of a binary operation. */
526 #if 0 /* Currently unused */
529 binop_result_type (struct value *v1, struct value *v2)
532 struct type *t1 = check_typedef (VALUE_TYPE (v1));
533 struct type *t2 = check_typedef (VALUE_TYPE (v2));
535 int l1 = TYPE_LENGTH (t1);
536 int l2 = TYPE_LENGTH (t2);
538 switch (current_language->la_language)
543 if (TYPE_CODE (t1) == TYPE_CODE_FLT)
544 return TYPE_CODE (t2) == TYPE_CODE_FLT && l2 > l1 ?
545 VALUE_TYPE (v2) : VALUE_TYPE (v1);
546 else if (TYPE_CODE (t2) == TYPE_CODE_FLT)
547 return TYPE_CODE (t1) == TYPE_CODE_FLT && l1 > l2 ?
548 VALUE_TYPE (v1) : VALUE_TYPE (v2);
549 else if (TYPE_UNSIGNED (t1) && l1 > l2)
550 return VALUE_TYPE (v1);
551 else if (TYPE_UNSIGNED (t2) && l2 > l1)
552 return VALUE_TYPE (v2);
553 else /* Both are signed. Result is the longer type */
554 return l1 > l2 ? VALUE_TYPE (v1) : VALUE_TYPE (v2);
557 /* If we are doing type-checking, l1 should equal l2, so this is
559 return l1 > l2 ? VALUE_TYPE (v1) : VALUE_TYPE (v2);
562 internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
563 return (struct type *) 0; /* For lint */
568 /* This page contains functions that are used in type/range checking.
569 They all return zero if the type/range check fails.
571 It is hoped that these will make extending GDB to parse different
572 languages a little easier. These are primarily used in eval.c when
573 evaluating expressions and making sure that their types are correct.
574 Instead of having a mess of conjucted/disjuncted expressions in an "if",
575 the ideas of type can be wrapped up in the following functions.
577 Note that some of them are not currently dependent upon which language
578 is currently being parsed. For example, floats are the same in
579 C and Modula-2 (ie. the only floating point type has TYPE_CODE of
580 TYPE_CODE_FLT), while booleans are different. */
582 /* Returns non-zero if its argument is a simple type. This is the same for
583 both Modula-2 and for C. In the C case, TYPE_CODE_CHAR will never occur,
584 and thus will never cause the failure of the test. */
586 simple_type (struct type *type)
588 CHECK_TYPEDEF (type);
589 switch (TYPE_CODE (type))
595 case TYPE_CODE_RANGE:
604 /* Returns non-zero if its argument is of an ordered type.
605 An ordered type is one in which the elements can be tested for the
606 properties of "greater than", "less than", etc, or for which the
607 operations "increment" or "decrement" make sense. */
609 ordered_type (struct type *type)
611 CHECK_TYPEDEF (type);
612 switch (TYPE_CODE (type))
618 case TYPE_CODE_RANGE:
626 /* Returns non-zero if the two types are the same */
628 same_type (struct type *arg1, struct type *arg2)
630 CHECK_TYPEDEF (type);
631 if (structured_type (arg1) ? !structured_type (arg2) : structured_type (arg2))
632 /* One is structured and one isn't */
634 else if (structured_type (arg1) && structured_type (arg2))
636 else if (numeric_type (arg1) && numeric_type (arg2))
637 return (TYPE_CODE (arg2) == TYPE_CODE (arg1)) &&
638 (TYPE_UNSIGNED (arg1) == TYPE_UNSIGNED (arg2))
644 /* Returns non-zero if the type is integral */
646 integral_type (struct type *type)
648 CHECK_TYPEDEF (type);
649 switch (current_language->la_language)
654 return (TYPE_CODE (type) != TYPE_CODE_INT) &&
655 (TYPE_CODE (type) != TYPE_CODE_ENUM) ? 0 : 1;
657 case language_pascal:
658 return TYPE_CODE (type) != TYPE_CODE_INT ? 0 : 1;
660 error (_("Language not supported."));
664 /* Returns non-zero if the value is numeric */
666 numeric_type (struct type *type)
668 CHECK_TYPEDEF (type);
669 switch (TYPE_CODE (type))
680 /* Returns non-zero if the value is a character type */
682 character_type (struct type *type)
684 CHECK_TYPEDEF (type);
685 switch (current_language->la_language)
688 case language_pascal:
689 return TYPE_CODE (type) != TYPE_CODE_CHAR ? 0 : 1;
694 return (TYPE_CODE (type) == TYPE_CODE_INT) &&
695 TYPE_LENGTH (type) == sizeof (char)
702 /* Returns non-zero if the value is a string type */
704 string_type (struct type *type)
706 CHECK_TYPEDEF (type);
707 switch (current_language->la_language)
710 case language_pascal:
711 return TYPE_CODE (type) != TYPE_CODE_STRING ? 0 : 1;
716 /* C does not have distinct string type. */
723 /* Returns non-zero if the value is a boolean type */
725 boolean_type (struct type *type)
727 CHECK_TYPEDEF (type);
728 if (TYPE_CODE (type) == TYPE_CODE_BOOL)
730 switch (current_language->la_language)
735 /* Might be more cleanly handled by having a
736 TYPE_CODE_INT_NOT_BOOL for (the deleted) CHILL and such
737 languages, or a TYPE_CODE_INT_OR_BOOL for C. */
738 if (TYPE_CODE (type) == TYPE_CODE_INT)
746 /* Returns non-zero if the value is a floating-point type */
748 float_type (struct type *type)
750 CHECK_TYPEDEF (type);
751 return TYPE_CODE (type) == TYPE_CODE_FLT;
754 /* Returns non-zero if the value is a pointer type */
756 pointer_type (struct type *type)
758 return TYPE_CODE (type) == TYPE_CODE_PTR ||
759 TYPE_CODE (type) == TYPE_CODE_REF;
762 /* Returns non-zero if the value is a structured type */
764 structured_type (struct type *type)
766 CHECK_TYPEDEF (type);
767 switch (current_language->la_language)
772 return (TYPE_CODE (type) == TYPE_CODE_STRUCT) ||
773 (TYPE_CODE (type) == TYPE_CODE_UNION) ||
774 (TYPE_CODE (type) == TYPE_CODE_ARRAY);
775 case language_pascal:
776 return (TYPE_CODE(type) == TYPE_CODE_STRUCT) ||
777 (TYPE_CODE(type) == TYPE_CODE_UNION) ||
778 (TYPE_CODE(type) == TYPE_CODE_SET) ||
779 (TYPE_CODE(type) == TYPE_CODE_ARRAY);
781 return (TYPE_CODE (type) == TYPE_CODE_STRUCT) ||
782 (TYPE_CODE (type) == TYPE_CODE_SET) ||
783 (TYPE_CODE (type) == TYPE_CODE_ARRAY);
791 lang_bool_type (void)
795 switch (current_language->la_language)
797 case language_fortran:
798 sym = lookup_symbol ("logical", NULL, VAR_DOMAIN, NULL, NULL);
801 type = SYMBOL_TYPE (sym);
802 if (type && TYPE_CODE (type) == TYPE_CODE_BOOL)
805 return builtin_type_f_logical_s2;
807 case language_pascal:
809 if (current_language->la_language==language_cplus)
810 {sym = lookup_symbol ("bool", NULL, VAR_DOMAIN, NULL, NULL);}
812 {sym = lookup_symbol ("boolean", NULL, VAR_DOMAIN, NULL, NULL);}
815 type = SYMBOL_TYPE (sym);
816 if (type && TYPE_CODE (type) == TYPE_CODE_BOOL)
819 return builtin_type_bool;
821 sym = lookup_symbol ("boolean", NULL, VAR_DOMAIN, NULL, NULL);
824 type = SYMBOL_TYPE (sym);
825 if (type && TYPE_CODE (type) == TYPE_CODE_BOOL)
828 return java_boolean_type;
831 return builtin_type_int;
835 /* This page contains functions that return info about
836 (struct value) values used in GDB. */
838 /* Returns non-zero if the value VAL represents a true value. */
840 value_true (struct value *val)
842 /* It is possible that we should have some sort of error if a non-boolean
843 value is used in this context. Possibly dependent on some kind of
844 "boolean-checking" option like range checking. But it should probably
845 not depend on the language except insofar as is necessary to identify
846 a "boolean" value (i.e. in C using a float, pointer, etc., as a boolean
847 should be an error, probably). */
848 return !value_logical_not (val);
851 /* This page contains functions for the printing out of
852 error messages that occur during type- and range-
855 /* These are called when a language fails a type- or range-check. The
856 first argument should be a printf()-style format string, and the
857 rest of the arguments should be its arguments. If
858 [type|range]_check is [type|range]_check_on, an error is printed;
859 if [type|range]_check_warn, a warning; otherwise just the
863 type_error (const char *string,...)
866 va_start (args, string);
870 case type_check_warn:
871 vwarning (string, args);
874 verror (string, args);
877 /* FIXME: cagney/2002-01-30: Should this function print anything
878 when type error is off? */
879 vfprintf_filtered (gdb_stderr, string, args);
880 fprintf_filtered (gdb_stderr, "\n");
883 internal_error (__FILE__, __LINE__, _("bad switch"));
889 range_error (const char *string,...)
892 va_start (args, string);
896 case range_check_warn:
897 vwarning (string, args);
900 verror (string, args);
902 case range_check_off:
903 /* FIXME: cagney/2002-01-30: Should this function print anything
904 when range error is off? */
905 vfprintf_filtered (gdb_stderr, string, args);
906 fprintf_filtered (gdb_stderr, "\n");
909 internal_error (__FILE__, __LINE__, _("bad switch"));
915 /* This page contains miscellaneous functions */
917 /* Return the language enum for a given language string. */
920 language_enum (char *str)
924 for (i = 0; i < languages_size; i++)
925 if (strcmp (languages[i]->la_name, str) == 0)
926 return languages[i]->la_language;
928 return language_unknown;
931 /* Return the language struct for a given language enum. */
933 const struct language_defn *
934 language_def (enum language lang)
938 for (i = 0; i < languages_size; i++)
940 if (languages[i]->la_language == lang)
948 /* Return the language as a string */
950 language_str (enum language lang)
954 for (i = 0; i < languages_size; i++)
956 if (languages[i]->la_language == lang)
958 return languages[i]->la_name;
965 set_check (char *ignore, int from_tty)
968 "\"set check\" must be followed by the name of a check subcommand.\n");
969 help_list (setchecklist, "set check ", -1, gdb_stdout);
973 show_check (char *ignore, int from_tty)
975 cmd_show_list (showchecklist, from_tty, "");
978 /* Add a language to the set of known languages. */
981 add_language (const struct language_defn *lang)
983 if (lang->la_magic != LANG_MAGIC)
985 fprintf_unfiltered (gdb_stderr, "Magic number of %s language struct wrong\n",
987 internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
992 languages_allocsize = DEFAULT_ALLOCSIZE;
993 languages = (const struct language_defn **) xmalloc
994 (languages_allocsize * sizeof (*languages));
996 if (languages_size >= languages_allocsize)
998 languages_allocsize *= 2;
999 languages = (const struct language_defn **) xrealloc ((char *) languages,
1000 languages_allocsize * sizeof (*languages));
1002 languages[languages_size++] = lang;
1005 /* Iterate through all registered languages looking for and calling
1006 any non-NULL struct language_defn.skip_trampoline() functions.
1007 Return the result from the first that returns non-zero, or 0 if all
1010 skip_language_trampoline (struct frame_info *frame, CORE_ADDR pc)
1014 for (i = 0; i < languages_size; i++)
1016 if (languages[i]->skip_trampoline)
1018 CORE_ADDR real_pc = (languages[i]->skip_trampoline) (frame, pc);
1027 /* Return demangled language symbol, or NULL.
1028 FIXME: Options are only useful for certain languages and ignored
1029 by others, so it would be better to remove them here and have a
1030 more flexible demangler for the languages that need it.
1031 FIXME: Sometimes the demangler is invoked when we don't know the
1032 language, so we can't use this everywhere. */
1034 language_demangle (const struct language_defn *current_language,
1035 const char *mangled, int options)
1037 if (current_language != NULL && current_language->la_demangle)
1038 return current_language->la_demangle (mangled, options);
1042 /* Return class name from physname or NULL. */
1044 language_class_name_from_physname (const struct language_defn *current_language,
1045 const char *physname)
1047 if (current_language != NULL && current_language->la_class_name_from_physname)
1048 return current_language->la_class_name_from_physname (physname);
1052 /* Return non-zero if TYPE should be passed (and returned) by
1053 reference at the language level. */
1055 language_pass_by_reference (struct type *type)
1057 return current_language->la_pass_by_reference (type);
1060 /* Return zero; by default, types are passed by value at the language
1061 level. The target ABI may pass or return some structs by reference
1062 independent of this. */
1064 default_pass_by_reference (struct type *type)
1069 /* Return the default string containing the list of characters
1070 delimiting words. This is a reasonable default value that
1071 most languages should be able to use. */
1074 default_word_break_characters (void)
1076 return " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-";
1079 /* Print the index of array elements using the C99 syntax. */
1082 default_print_array_index (struct value *index_value, struct ui_file *stream,
1083 int format, enum val_prettyprint pretty)
1085 fprintf_filtered (stream, "[");
1086 LA_VALUE_PRINT (index_value, stream, format, pretty);
1087 fprintf_filtered (stream, "] = ");
1090 /* Define the language that is no language. */
1093 unk_lang_parser (void)
1099 unk_lang_error (char *msg)
1101 error (_("Attempted to parse an expression with unknown language"));
1105 unk_lang_emit_char (int c, struct ui_file *stream, int quoter)
1107 error (_("internal error - unimplemented function unk_lang_emit_char called."));
1111 unk_lang_printchar (int c, struct ui_file *stream)
1113 error (_("internal error - unimplemented function unk_lang_printchar called."));
1117 unk_lang_printstr (struct ui_file *stream, const gdb_byte *string,
1118 unsigned int length, int width, int force_ellipses)
1120 error (_("internal error - unimplemented function unk_lang_printstr called."));
1124 unk_lang_print_type (struct type *type, char *varstring, struct ui_file *stream,
1125 int show, int level)
1127 error (_("internal error - unimplemented function unk_lang_print_type called."));
1131 unk_lang_val_print (struct type *type, const gdb_byte *valaddr,
1132 int embedded_offset, CORE_ADDR address,
1133 struct ui_file *stream, int format,
1134 int deref_ref, int recurse, enum val_prettyprint pretty)
1136 error (_("internal error - unimplemented function unk_lang_val_print called."));
1140 unk_lang_value_print (struct value *val, struct ui_file *stream, int format,
1141 enum val_prettyprint pretty)
1143 error (_("internal error - unimplemented function unk_lang_value_print called."));
1146 static CORE_ADDR unk_lang_trampoline (struct frame_info *frame, CORE_ADDR pc)
1151 /* Unknown languages just use the cplus demangler. */
1152 static char *unk_lang_demangle (const char *mangled, int options)
1154 return cplus_demangle (mangled, options);
1157 static char *unk_lang_class_name (const char *mangled)
1162 static const struct op_print unk_op_print_tab[] =
1164 {NULL, OP_NULL, PREC_NULL, 0}
1168 unknown_language_arch_info (struct gdbarch *gdbarch,
1169 struct language_arch_info *lai)
1171 lai->string_char_type = builtin_type (gdbarch)->builtin_char;
1172 lai->primitive_type_vector = GDBARCH_OBSTACK_CALLOC (gdbarch, 1,
1176 const struct language_defn unknown_language_defn =
1184 &exp_descriptor_standard,
1188 unk_lang_printchar, /* Print character constant */
1191 unk_lang_print_type, /* Print a type using appropriate syntax */
1192 unk_lang_val_print, /* Print a value using appropriate syntax */
1193 unk_lang_value_print, /* Print a top-level value */
1194 unk_lang_trampoline, /* Language specific skip_trampoline */
1195 value_of_this, /* value_of_this */
1196 basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
1197 basic_lookup_transparent_type,/* lookup_transparent_type */
1198 unk_lang_demangle, /* Language specific symbol demangler */
1199 unk_lang_class_name, /* Language specific class_name_from_physname */
1200 unk_op_print_tab, /* expression operators for printing */
1201 1, /* c-style arrays */
1202 0, /* String lower bound */
1203 default_word_break_characters,
1204 default_make_symbol_completion_list,
1205 unknown_language_arch_info, /* la_language_arch_info. */
1206 default_print_array_index,
1207 default_pass_by_reference,
1211 /* These two structs define fake entries for the "local" and "auto" options. */
1212 const struct language_defn auto_language_defn =
1220 &exp_descriptor_standard,
1224 unk_lang_printchar, /* Print character constant */
1227 unk_lang_print_type, /* Print a type using appropriate syntax */
1228 unk_lang_val_print, /* Print a value using appropriate syntax */
1229 unk_lang_value_print, /* Print a top-level value */
1230 unk_lang_trampoline, /* Language specific skip_trampoline */
1231 value_of_this, /* value_of_this */
1232 basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
1233 basic_lookup_transparent_type,/* lookup_transparent_type */
1234 unk_lang_demangle, /* Language specific symbol demangler */
1235 unk_lang_class_name, /* Language specific class_name_from_physname */
1236 unk_op_print_tab, /* expression operators for printing */
1237 1, /* c-style arrays */
1238 0, /* String lower bound */
1239 default_word_break_characters,
1240 default_make_symbol_completion_list,
1241 unknown_language_arch_info, /* la_language_arch_info. */
1242 default_print_array_index,
1243 default_pass_by_reference,
1247 const struct language_defn local_language_defn =
1255 &exp_descriptor_standard,
1259 unk_lang_printchar, /* Print character constant */
1262 unk_lang_print_type, /* Print a type using appropriate syntax */
1263 unk_lang_val_print, /* Print a value using appropriate syntax */
1264 unk_lang_value_print, /* Print a top-level value */
1265 unk_lang_trampoline, /* Language specific skip_trampoline */
1266 value_of_this, /* value_of_this */
1267 basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
1268 basic_lookup_transparent_type,/* lookup_transparent_type */
1269 unk_lang_demangle, /* Language specific symbol demangler */
1270 unk_lang_class_name, /* Language specific class_name_from_physname */
1271 unk_op_print_tab, /* expression operators for printing */
1272 1, /* c-style arrays */
1273 0, /* String lower bound */
1274 default_word_break_characters,
1275 default_make_symbol_completion_list,
1276 unknown_language_arch_info, /* la_language_arch_info. */
1277 default_print_array_index,
1278 default_pass_by_reference,
1282 /* Per-architecture language information. */
1284 static struct gdbarch_data *language_gdbarch_data;
1286 struct language_gdbarch
1288 /* A vector of per-language per-architecture info. Indexed by "enum
1290 struct language_arch_info arch_info[nr_languages];
1294 language_gdbarch_post_init (struct gdbarch *gdbarch)
1296 struct language_gdbarch *l;
1299 l = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct language_gdbarch);
1300 for (i = 0; i < languages_size; i++)
1302 if (languages[i] != NULL
1303 && languages[i]->la_language_arch_info != NULL)
1304 languages[i]->la_language_arch_info
1305 (gdbarch, l->arch_info + languages[i]->la_language);
1311 language_string_char_type (const struct language_defn *la,
1312 struct gdbarch *gdbarch)
1314 struct language_gdbarch *ld = gdbarch_data (gdbarch,
1315 language_gdbarch_data);
1316 return ld->arch_info[la->la_language].string_char_type;
1320 language_lookup_primitive_type_by_name (const struct language_defn *la,
1321 struct gdbarch *gdbarch,
1324 struct language_gdbarch *ld = gdbarch_data (gdbarch,
1325 language_gdbarch_data);
1326 struct type *const *p;
1327 for (p = ld->arch_info[la->la_language].primitive_type_vector;
1331 if (strcmp (TYPE_NAME (*p), name) == 0)
1337 /* Initialize the language routines */
1340 _initialize_language (void)
1342 struct cmd_list_element *set, *show;
1344 language_gdbarch_data
1345 = gdbarch_data_register_post_init (language_gdbarch_post_init);
1347 /* GDB commands for language specific stuff */
1349 /* FIXME: cagney/2005-02-20: This should be implemented using an
1351 add_setshow_string_noescape_cmd ("language", class_support, &language, _("\
1352 Set the current source language."), _("\
1353 Show the current source language."), NULL,
1354 set_language_command,
1355 show_language_command,
1356 &setlist, &showlist);
1358 add_prefix_cmd ("check", no_class, set_check,
1359 _("Set the status of the type/range checker."),
1360 &setchecklist, "set check ", 0, &setlist);
1361 add_alias_cmd ("c", "check", no_class, 1, &setlist);
1362 add_alias_cmd ("ch", "check", no_class, 1, &setlist);
1364 add_prefix_cmd ("check", no_class, show_check,
1365 _("Show the status of the type/range checker."),
1366 &showchecklist, "show check ", 0, &showlist);
1367 add_alias_cmd ("c", "check", no_class, 1, &showlist);
1368 add_alias_cmd ("ch", "check", no_class, 1, &showlist);
1370 /* FIXME: cagney/2005-02-20: This should be implemented using an
1372 add_setshow_string_noescape_cmd ("type", class_support, &type, _("\
1373 Set type checking. (on/warn/off/auto)"), _("\
1374 Show type checking. (on/warn/off/auto)"), NULL,
1377 &setchecklist, &showchecklist);
1379 /* FIXME: cagney/2005-02-20: This should be implemented using an
1381 add_setshow_string_noescape_cmd ("range", class_support, &range, _("\
1382 Set range checking. (on/warn/off/auto)"), _("\
1383 Show range checking. (on/warn/off/auto)"), NULL,
1386 &setchecklist, &showchecklist);
1388 /* FIXME: cagney/2005-02-20: This should be implemented using an
1390 add_setshow_string_noescape_cmd ("case-sensitive", class_support,
1391 &case_sensitive, _("\
1392 Set case sensitivity in name search. (on/off/auto)"), _("\
1393 Show case sensitivity in name search. (on/off/auto)"), _("\
1394 For Fortran the default is off; for other languages the default is on."),
1397 &setlist, &showlist);
1399 add_language (&unknown_language_defn);
1400 add_language (&local_language_defn);
1401 add_language (&auto_language_defn);
1403 language = savestring ("auto", strlen ("auto"));
1404 type = savestring ("auto", strlen ("auto"));
1405 range = savestring ("auto", strlen ("auto"));
1406 case_sensitive = savestring ("auto",strlen ("auto"));
1408 /* Have the above take effect */
1409 set_language (language_auto);