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, 2009, 2010, 2011
5 Free Software Foundation, Inc.
7 Contributed by the Department of Computer Science at the State University
8 of New York at Buffalo.
10 This file is part of GDB.
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 3 of the License, or
15 (at your option) any later version.
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
22 You should have received a copy of the GNU General Public License
23 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 /* This file contains functions that return things that are specific
26 to languages. Each function should examine current_language if necessary,
27 and return the appropriate result. */
29 /* FIXME: Most of these would be better organized as macros which
30 return data out of a "language-specific" struct pointer that is set
31 whenever the working language changes. That would be a lot faster. */
35 #include "gdb_string.h"
41 #include "expression.h"
44 #include "parser-defs.h"
49 extern void _initialize_language (void);
51 static void unk_lang_error (char *);
53 static int unk_lang_parser (void);
55 static void show_check (char *, int);
57 static void set_check (char *, int);
59 static void set_type_range_case (void);
61 static void unk_lang_emit_char (int c, struct type *type,
62 struct ui_file *stream, int quoter);
64 static void unk_lang_printchar (int c, struct type *type,
65 struct ui_file *stream);
67 static void unk_lang_print_type (struct type *, const char *, struct ui_file *,
70 static int unk_lang_value_print (struct value *, struct ui_file *,
71 const struct value_print_options *);
73 static CORE_ADDR unk_lang_trampoline (struct frame_info *, CORE_ADDR pc);
75 /* Forward declaration */
76 extern const struct language_defn unknown_language_defn;
78 /* The current (default at startup) state of type and range checking.
79 (If the modes are set to "auto", though, these are changed based
80 on the default language at startup, and then again based on the
81 language of the first source file. */
83 enum range_mode range_mode = range_mode_auto;
84 enum range_check range_check = range_check_off;
85 enum type_mode type_mode = type_mode_auto;
86 enum type_check type_check = type_check_off;
87 enum case_mode case_mode = case_mode_auto;
88 enum case_sensitivity case_sensitivity = case_sensitive_on;
90 /* The current language and language_mode (see language.h) */
92 const struct language_defn *current_language = &unknown_language_defn;
93 enum language_mode language_mode = language_mode_auto;
95 /* The language that the user expects to be typing in (the language
96 of main(), or the last language we notified them about, or C). */
98 const struct language_defn *expected_language;
100 /* The list of supported languages. The list itself is malloc'd. */
102 static const struct language_defn **languages;
103 static unsigned languages_size;
104 static unsigned languages_allocsize;
105 #define DEFAULT_ALLOCSIZE 4
107 /* The current values of the "set language/type/range" enum
109 static const char *language;
110 static const char *type;
111 static const char *range;
112 static const char *case_sensitive;
114 /* Warning issued when current_language and the language of the current
115 frame do not match. */
116 char lang_frame_mismatch_warn[] =
117 "Warning: the current language does not match this frame.";
119 /* This page contains the functions corresponding to GDB commands
120 and their helpers. */
122 /* Show command. Display a warning if the language set
123 does not match the frame. */
125 show_language_command (struct ui_file *file, int from_tty,
126 struct cmd_list_element *c, const char *value)
128 enum language flang; /* The language of the current frame */
130 if (language_mode == language_mode_auto)
131 fprintf_filtered (gdb_stdout,
132 _("The current source language is "
133 "\"auto; currently %s\".\n"),
134 current_language->la_name);
136 fprintf_filtered (gdb_stdout,
137 _("The current source language is \"%s\".\n"),
138 current_language->la_name);
140 flang = get_frame_language ();
141 if (flang != language_unknown &&
142 language_mode == language_mode_manual &&
143 current_language->la_language != flang)
144 printf_filtered ("%s\n", lang_frame_mismatch_warn);
147 /* Set command. Change the current working language. */
149 set_language_command (char *ignore, int from_tty, struct cmd_list_element *c)
154 /* Search the list of languages for a match. */
155 for (i = 0; i < languages_size; i++)
157 if (strcmp (languages[i]->la_name, language) == 0)
159 /* Found it! Go into manual mode, and use this language. */
160 if (languages[i]->la_language == language_auto)
162 /* Enter auto mode. Set to the current frame's language, if
163 known, or fallback to the initial language. */
164 language_mode = language_mode_auto;
165 flang = get_frame_language ();
166 if (flang != language_unknown)
167 set_language (flang);
169 set_initial_language ();
170 expected_language = current_language;
175 /* Enter manual mode. Set the specified language. */
176 language_mode = language_mode_manual;
177 current_language = languages[i];
178 set_type_range_case ();
179 expected_language = current_language;
185 internal_error (__FILE__, __LINE__,
186 "Couldn't find language `%s' in known languages list.",
190 /* Show command. Display a warning if the type setting does
191 not match the current language. */
193 show_type_command (struct ui_file *file, int from_tty,
194 struct cmd_list_element *c, const char *value)
196 if (type_mode == type_mode_auto)
208 case type_check_warn:
212 internal_error (__FILE__, __LINE__,
213 "Unrecognized type check setting.");
216 fprintf_filtered (gdb_stdout,
217 _("Type checking is \"auto; currently %s\".\n"),
221 fprintf_filtered (gdb_stdout, _("Type checking is \"%s\".\n"),
224 if (type_check != current_language->la_type_check)
225 warning (_("the current type check setting"
226 " does not match the language.\n"));
229 /* Set command. Change the setting for type checking. */
231 set_type_command (char *ignore, int from_tty, struct cmd_list_element *c)
233 if (strcmp (type, "on") == 0)
235 type_check = type_check_on;
236 type_mode = type_mode_manual;
238 else if (strcmp (type, "warn") == 0)
240 type_check = type_check_warn;
241 type_mode = type_mode_manual;
243 else if (strcmp (type, "off") == 0)
245 type_check = type_check_off;
246 type_mode = type_mode_manual;
248 else if (strcmp (type, "auto") == 0)
250 type_mode = type_mode_auto;
251 set_type_range_case ();
255 internal_error (__FILE__, __LINE__,
256 _("Unrecognized type check setting: \"%s\""), type);
258 if (type_check != current_language->la_type_check)
259 warning (_("the current type check setting"
260 " does not match the language.\n"));
263 /* Show command. Display a warning if the range setting does
264 not match the current language. */
266 show_range_command (struct ui_file *file, int from_tty,
267 struct cmd_list_element *c, const char *value)
269 if (range_mode == range_mode_auto)
278 case range_check_off:
281 case range_check_warn:
285 internal_error (__FILE__, __LINE__,
286 "Unrecognized range check setting.");
289 fprintf_filtered (gdb_stdout,
290 _("Range checking is \"auto; currently %s\".\n"),
294 fprintf_filtered (gdb_stdout, _("Range checking is \"%s\".\n"),
297 if (range_check != current_language->la_range_check)
298 warning (_("the current range check setting "
299 "does not match the language.\n"));
302 /* Set command. Change the setting for range checking. */
304 set_range_command (char *ignore, int from_tty, struct cmd_list_element *c)
306 if (strcmp (range, "on") == 0)
308 range_check = range_check_on;
309 range_mode = range_mode_manual;
311 else if (strcmp (range, "warn") == 0)
313 range_check = range_check_warn;
314 range_mode = range_mode_manual;
316 else if (strcmp (range, "off") == 0)
318 range_check = range_check_off;
319 range_mode = range_mode_manual;
321 else if (strcmp (range, "auto") == 0)
323 range_mode = range_mode_auto;
324 set_type_range_case ();
329 internal_error (__FILE__, __LINE__,
330 _("Unrecognized range check setting: \"%s\""), range);
332 if (range_check != current_language->la_range_check)
333 warning (_("the current range check setting "
334 "does not match the language.\n"));
337 /* Show command. Display a warning if the case sensitivity setting does
338 not match the current language. */
340 show_case_command (struct ui_file *file, int from_tty,
341 struct cmd_list_element *c, const char *value)
343 if (case_mode == case_mode_auto)
347 switch (case_sensitivity)
349 case case_sensitive_on:
352 case case_sensitive_off:
356 internal_error (__FILE__, __LINE__,
357 "Unrecognized case-sensitive setting.");
360 fprintf_filtered (gdb_stdout,
361 _("Case sensitivity in "
362 "name search is \"auto; currently %s\".\n"),
366 fprintf_filtered (gdb_stdout,
367 _("Case sensitivity in name search is \"%s\".\n"),
370 if (case_sensitivity != current_language->la_case_sensitivity)
371 warning (_("the current case sensitivity setting does not match "
375 /* Set command. Change the setting for case sensitivity. */
378 set_case_command (char *ignore, int from_tty, struct cmd_list_element *c)
380 if (strcmp (case_sensitive, "on") == 0)
382 case_sensitivity = case_sensitive_on;
383 case_mode = case_mode_manual;
385 else if (strcmp (case_sensitive, "off") == 0)
387 case_sensitivity = case_sensitive_off;
388 case_mode = case_mode_manual;
390 else if (strcmp (case_sensitive, "auto") == 0)
392 case_mode = case_mode_auto;
393 set_type_range_case ();
398 internal_error (__FILE__, __LINE__,
399 "Unrecognized case-sensitive setting: \"%s\"",
403 if (case_sensitivity != current_language->la_case_sensitivity)
404 warning (_("the current case sensitivity setting does not match "
408 /* Set the status of range and type checking and case sensitivity based on
409 the current modes and the current language.
410 If SHOW is non-zero, then print out the current language,
411 type and range checking status. */
413 set_type_range_case (void)
415 if (range_mode == range_mode_auto)
416 range_check = current_language->la_range_check;
418 if (type_mode == type_mode_auto)
419 type_check = current_language->la_type_check;
421 if (case_mode == case_mode_auto)
422 case_sensitivity = current_language->la_case_sensitivity;
425 /* Set current language to (enum language) LANG. Returns previous language. */
428 set_language (enum language lang)
431 enum language prev_language;
433 prev_language = current_language->la_language;
435 for (i = 0; i < languages_size; i++)
437 if (languages[i]->la_language == lang)
439 current_language = languages[i];
440 set_type_range_case ();
445 return prev_language;
449 /* Print out the current language settings: language, range and
450 type checking. If QUIETLY, print only what has changed. */
453 language_info (int quietly)
455 if (quietly && expected_language == current_language)
458 expected_language = current_language;
459 printf_unfiltered (_("Current language: %s\n"), language);
460 show_language_command (NULL, 1, NULL, NULL);
464 printf_unfiltered (_("Type checking: %s\n"), type);
465 show_type_command (NULL, 1, NULL, NULL);
466 printf_unfiltered (_("Range checking: %s\n"), range);
467 show_range_command (NULL, 1, NULL, NULL);
468 printf_unfiltered (_("Case sensitivity: %s\n"), case_sensitive);
469 show_case_command (NULL, 1, NULL, NULL);
473 /* Return the result of a binary operation. */
475 #if 0 /* Currently unused */
478 binop_result_type (struct value *v1, struct value *v2)
481 struct type *t1 = check_typedef (VALUE_TYPE (v1));
482 struct type *t2 = check_typedef (VALUE_TYPE (v2));
484 int l1 = TYPE_LENGTH (t1);
485 int l2 = TYPE_LENGTH (t2);
487 switch (current_language->la_language)
493 if (TYPE_CODE (t1) == TYPE_CODE_FLT)
494 return TYPE_CODE (t2) == TYPE_CODE_FLT && l2 > l1 ?
495 VALUE_TYPE (v2) : VALUE_TYPE (v1);
496 else if (TYPE_CODE (t2) == TYPE_CODE_FLT)
497 return TYPE_CODE (t1) == TYPE_CODE_FLT && l1 > l2 ?
498 VALUE_TYPE (v1) : VALUE_TYPE (v2);
499 else if (TYPE_UNSIGNED (t1) && l1 > l2)
500 return VALUE_TYPE (v1);
501 else if (TYPE_UNSIGNED (t2) && l2 > l1)
502 return VALUE_TYPE (v2);
503 else /* Both are signed. Result is the
505 return l1 > l2 ? VALUE_TYPE (v1) : VALUE_TYPE (v2);
508 /* If we are doing type-checking, l1 should equal l2, so this is
510 return l1 > l2 ? VALUE_TYPE (v1) : VALUE_TYPE (v2);
513 internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
514 return (struct type *) 0; /* For lint */
519 /* This page contains functions that are used in type/range checking.
520 They all return zero if the type/range check fails.
522 It is hoped that these will make extending GDB to parse different
523 languages a little easier. These are primarily used in eval.c when
524 evaluating expressions and making sure that their types are correct.
525 Instead of having a mess of conjucted/disjuncted expressions in an "if",
526 the ideas of type can be wrapped up in the following functions.
528 Note that some of them are not currently dependent upon which language
529 is currently being parsed. For example, floats are the same in
530 C and Modula-2 (ie. the only floating point type has TYPE_CODE of
531 TYPE_CODE_FLT), while booleans are different. */
533 /* Returns non-zero if its argument is a simple type. This is the same for
534 both Modula-2 and for C. In the C case, TYPE_CODE_CHAR will never occur,
535 and thus will never cause the failure of the test. */
537 simple_type (struct type *type)
539 CHECK_TYPEDEF (type);
540 switch (TYPE_CODE (type))
546 case TYPE_CODE_RANGE:
555 /* Returns non-zero if its argument is of an ordered type.
556 An ordered type is one in which the elements can be tested for the
557 properties of "greater than", "less than", etc, or for which the
558 operations "increment" or "decrement" make sense. */
560 ordered_type (struct type *type)
562 CHECK_TYPEDEF (type);
563 switch (TYPE_CODE (type))
569 case TYPE_CODE_RANGE:
577 /* Returns non-zero if the two types are the same */
579 same_type (struct type *arg1, struct type *arg2)
581 CHECK_TYPEDEF (type);
582 if (structured_type (arg1)
583 ? !structured_type (arg2) : structured_type (arg2))
584 /* One is structured and one isn't */
586 else if (structured_type (arg1) && structured_type (arg2))
588 else if (numeric_type (arg1) && numeric_type (arg2))
589 return (TYPE_CODE (arg2) == TYPE_CODE (arg1)) &&
590 (TYPE_UNSIGNED (arg1) == TYPE_UNSIGNED (arg2))
596 /* Returns non-zero if the type is integral */
598 integral_type (struct type *type)
600 CHECK_TYPEDEF (type);
601 switch (current_language->la_language)
607 return (TYPE_CODE (type) != TYPE_CODE_INT) &&
608 (TYPE_CODE (type) != TYPE_CODE_ENUM) ? 0 : 1;
610 case language_pascal:
611 return TYPE_CODE (type) != TYPE_CODE_INT ? 0 : 1;
613 error (_("Language not supported."));
617 /* Returns non-zero if the value is numeric */
619 numeric_type (struct type *type)
621 CHECK_TYPEDEF (type);
622 switch (TYPE_CODE (type))
633 /* Returns non-zero if the value is a character type */
635 character_type (struct type *type)
637 CHECK_TYPEDEF (type);
638 switch (current_language->la_language)
641 case language_pascal:
642 return TYPE_CODE (type) != TYPE_CODE_CHAR ? 0 : 1;
648 return (TYPE_CODE (type) == TYPE_CODE_INT) &&
649 TYPE_LENGTH (type) == sizeof (char)
656 /* Returns non-zero if the value is a string type */
658 string_type (struct type *type)
660 CHECK_TYPEDEF (type);
661 switch (current_language->la_language)
664 case language_pascal:
665 return TYPE_CODE (type) != TYPE_CODE_STRING ? 0 : 1;
671 /* C does not have distinct string type. */
678 /* Returns non-zero if the value is a boolean type */
680 boolean_type (struct type *type)
682 CHECK_TYPEDEF (type);
683 if (TYPE_CODE (type) == TYPE_CODE_BOOL)
685 switch (current_language->la_language)
691 /* Might be more cleanly handled by having a
692 TYPE_CODE_INT_NOT_BOOL for (the deleted) CHILL and such
693 languages, or a TYPE_CODE_INT_OR_BOOL for C. */
694 if (TYPE_CODE (type) == TYPE_CODE_INT)
702 /* Returns non-zero if the value is a floating-point type */
704 float_type (struct type *type)
706 CHECK_TYPEDEF (type);
707 return TYPE_CODE (type) == TYPE_CODE_FLT;
711 /* Returns non-zero if the value is a pointer type */
713 pointer_type (struct type *type)
715 return TYPE_CODE (type) == TYPE_CODE_PTR ||
716 TYPE_CODE (type) == TYPE_CODE_REF;
720 /* Returns non-zero if the value is a structured type */
722 structured_type (struct type *type)
724 CHECK_TYPEDEF (type);
725 switch (current_language->la_language)
731 return (TYPE_CODE (type) == TYPE_CODE_STRUCT) ||
732 (TYPE_CODE (type) == TYPE_CODE_UNION) ||
733 (TYPE_CODE (type) == TYPE_CODE_ARRAY);
734 case language_pascal:
735 return (TYPE_CODE(type) == TYPE_CODE_STRUCT) ||
736 (TYPE_CODE(type) == TYPE_CODE_UNION) ||
737 (TYPE_CODE(type) == TYPE_CODE_SET) ||
738 (TYPE_CODE(type) == TYPE_CODE_ARRAY);
740 return (TYPE_CODE (type) == TYPE_CODE_STRUCT) ||
741 (TYPE_CODE (type) == TYPE_CODE_SET) ||
742 (TYPE_CODE (type) == TYPE_CODE_ARRAY);
749 /* This page contains functions that return info about
750 (struct value) values used in GDB. */
752 /* Returns non-zero if the value VAL represents a true value. */
754 value_true (struct value *val)
756 /* It is possible that we should have some sort of error if a non-boolean
757 value is used in this context. Possibly dependent on some kind of
758 "boolean-checking" option like range checking. But it should probably
759 not depend on the language except insofar as is necessary to identify
760 a "boolean" value (i.e. in C using a float, pointer, etc., as a boolean
761 should be an error, probably). */
762 return !value_logical_not (val);
765 /* This page contains functions for the printing out of
766 error messages that occur during type- and range-
769 /* These are called when a language fails a type- or range-check. The
770 first argument should be a printf()-style format string, and the
771 rest of the arguments should be its arguments. If
772 [type|range]_check is [type|range]_check_on, an error is printed;
773 if [type|range]_check_warn, a warning; otherwise just the
777 type_error (const char *string,...)
781 va_start (args, string);
784 case type_check_warn:
785 vwarning (string, args);
788 verror (string, args);
791 /* FIXME: cagney/2002-01-30: Should this function print anything
792 when type error is off? */
793 vfprintf_filtered (gdb_stderr, string, args);
794 fprintf_filtered (gdb_stderr, "\n");
797 internal_error (__FILE__, __LINE__, _("bad switch"));
803 range_error (const char *string,...)
807 va_start (args, string);
810 case range_check_warn:
811 vwarning (string, args);
814 verror (string, args);
816 case range_check_off:
817 /* FIXME: cagney/2002-01-30: Should this function print anything
818 when range error is off? */
819 vfprintf_filtered (gdb_stderr, string, args);
820 fprintf_filtered (gdb_stderr, "\n");
823 internal_error (__FILE__, __LINE__, _("bad switch"));
829 /* This page contains miscellaneous functions */
831 /* Return the language enum for a given language string. */
834 language_enum (char *str)
838 for (i = 0; i < languages_size; i++)
839 if (strcmp (languages[i]->la_name, str) == 0)
840 return languages[i]->la_language;
842 return language_unknown;
845 /* Return the language struct for a given language enum. */
847 const struct language_defn *
848 language_def (enum language lang)
852 for (i = 0; i < languages_size; i++)
854 if (languages[i]->la_language == lang)
862 /* Return the language as a string */
864 language_str (enum language lang)
868 for (i = 0; i < languages_size; i++)
870 if (languages[i]->la_language == lang)
872 return languages[i]->la_name;
879 set_check (char *ignore, int from_tty)
882 "\"set check\" must be followed by the name of a check subcommand.\n");
883 help_list (setchecklist, "set check ", -1, gdb_stdout);
887 show_check (char *ignore, int from_tty)
889 cmd_show_list (showchecklist, from_tty, "");
892 /* Add a language to the set of known languages. */
895 add_language (const struct language_defn *lang)
897 /* For the "set language" command. */
898 static char **language_names = NULL;
899 /* For the "help set language" command. */
900 char *language_set_doc = NULL;
903 struct ui_file *tmp_stream;
905 if (lang->la_magic != LANG_MAGIC)
907 fprintf_unfiltered (gdb_stderr,
908 "Magic number of %s language struct wrong\n",
910 internal_error (__FILE__, __LINE__,
911 _("failed internal consistency check"));
916 languages_allocsize = DEFAULT_ALLOCSIZE;
917 languages = (const struct language_defn **) xmalloc
918 (languages_allocsize * sizeof (*languages));
920 if (languages_size >= languages_allocsize)
922 languages_allocsize *= 2;
923 languages = (const struct language_defn **) xrealloc ((char *) languages,
924 languages_allocsize * sizeof (*languages));
926 languages[languages_size++] = lang;
928 /* Build the language names array, to be used as enumeration in the
929 set language" enum command. */
930 language_names = xrealloc (language_names,
931 (languages_size + 1) * sizeof (const char *));
932 for (i = 0; i < languages_size; ++i)
933 language_names[i] = languages[i]->la_name;
934 language_names[i] = NULL;
936 /* Build the "help set language" docs. */
937 tmp_stream = mem_fileopen ();
939 fprintf_unfiltered (tmp_stream,
940 _("Set the current source language.\n"
941 "The currently understood settings are:\n\nlocal or "
942 "auto Automatic setting based on source file\n"));
944 for (i = 0; i < languages_size; ++i)
946 /* Already dealt with these above. */
947 if (languages[i]->la_language == language_unknown
948 || languages[i]->la_language == language_auto)
951 /* FIXME: i18n: for now assume that the human-readable name
952 is just a capitalization of the internal name. */
953 fprintf_unfiltered (tmp_stream, "%-16s Use the %c%s language\n",
954 languages[i]->la_name,
955 /* Capitalize first letter of language
957 toupper (languages[i]->la_name[0]),
958 languages[i]->la_name + 1);
961 language_set_doc = ui_file_xstrdup (tmp_stream, NULL);
962 ui_file_delete (tmp_stream);
964 add_setshow_enum_cmd ("language", class_support,
965 (const char **) language_names,
968 _("Show the current source language."),
969 NULL, set_language_command,
970 show_language_command,
971 &setlist, &showlist);
973 xfree (language_set_doc);
976 /* Iterate through all registered languages looking for and calling
977 any non-NULL struct language_defn.skip_trampoline() functions.
978 Return the result from the first that returns non-zero, or 0 if all
981 skip_language_trampoline (struct frame_info *frame, CORE_ADDR pc)
985 for (i = 0; i < languages_size; i++)
987 if (languages[i]->skip_trampoline)
989 CORE_ADDR real_pc = (languages[i]->skip_trampoline) (frame, pc);
999 /* Return demangled language symbol, or NULL.
1000 FIXME: Options are only useful for certain languages and ignored
1001 by others, so it would be better to remove them here and have a
1002 more flexible demangler for the languages that need it.
1003 FIXME: Sometimes the demangler is invoked when we don't know the
1004 language, so we can't use this everywhere. */
1006 language_demangle (const struct language_defn *current_language,
1007 const char *mangled, int options)
1009 if (current_language != NULL && current_language->la_demangle)
1010 return current_language->la_demangle (mangled, options);
1014 /* Return class name from physname or NULL. */
1016 language_class_name_from_physname (const struct language_defn *current_language,
1017 const char *physname)
1019 if (current_language != NULL
1020 && current_language->la_class_name_from_physname)
1021 return current_language->la_class_name_from_physname (physname);
1025 /* Return non-zero if TYPE should be passed (and returned) by
1026 reference at the language level. */
1028 language_pass_by_reference (struct type *type)
1030 return current_language->la_pass_by_reference (type);
1033 /* Return zero; by default, types are passed by value at the language
1034 level. The target ABI may pass or return some structs by reference
1035 independent of this. */
1037 default_pass_by_reference (struct type *type)
1042 /* Return the default string containing the list of characters
1043 delimiting words. This is a reasonable default value that
1044 most languages should be able to use. */
1047 default_word_break_characters (void)
1049 return " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-";
1052 /* Print the index of array elements using the C99 syntax. */
1055 default_print_array_index (struct value *index_value, struct ui_file *stream,
1056 const struct value_print_options *options)
1058 fprintf_filtered (stream, "[");
1059 LA_VALUE_PRINT (index_value, stream, options);
1060 fprintf_filtered (stream, "] = ");
1064 default_get_string (struct value *value, gdb_byte **buffer, int *length,
1065 struct type **char_type, const char **charset)
1067 error (_("Getting a string is unsupported in this language."));
1070 /* Define the language that is no language. */
1073 unk_lang_parser (void)
1079 unk_lang_error (char *msg)
1081 error (_("Attempted to parse an expression with unknown language"));
1085 unk_lang_emit_char (int c, struct type *type, struct ui_file *stream,
1088 error (_("internal error - unimplemented "
1089 "function unk_lang_emit_char called."));
1093 unk_lang_printchar (int c, struct type *type, struct ui_file *stream)
1095 error (_("internal error - unimplemented "
1096 "function unk_lang_printchar called."));
1100 unk_lang_printstr (struct ui_file *stream, struct type *type,
1101 const gdb_byte *string, unsigned int length,
1102 const char *encoding, int force_ellipses,
1103 const struct value_print_options *options)
1105 error (_("internal error - unimplemented "
1106 "function unk_lang_printstr called."));
1110 unk_lang_print_type (struct type *type, const char *varstring,
1111 struct ui_file *stream, int show, int level)
1113 error (_("internal error - unimplemented "
1114 "function unk_lang_print_type called."));
1118 unk_lang_val_print (struct type *type, const gdb_byte *valaddr,
1119 int embedded_offset, CORE_ADDR address,
1120 struct ui_file *stream, int recurse,
1121 const struct value *val,
1122 const struct value_print_options *options)
1124 error (_("internal error - unimplemented "
1125 "function unk_lang_val_print called."));
1129 unk_lang_value_print (struct value *val, struct ui_file *stream,
1130 const struct value_print_options *options)
1132 error (_("internal error - unimplemented "
1133 "function unk_lang_value_print called."));
1136 static CORE_ADDR unk_lang_trampoline (struct frame_info *frame, CORE_ADDR pc)
1141 /* Unknown languages just use the cplus demangler. */
1142 static char *unk_lang_demangle (const char *mangled, int options)
1144 return cplus_demangle (mangled, options);
1147 static char *unk_lang_class_name (const char *mangled)
1152 static const struct op_print unk_op_print_tab[] =
1154 {NULL, OP_NULL, PREC_NULL, 0}
1158 unknown_language_arch_info (struct gdbarch *gdbarch,
1159 struct language_arch_info *lai)
1161 lai->string_char_type = builtin_type (gdbarch)->builtin_char;
1162 lai->bool_type_default = builtin_type (gdbarch)->builtin_int;
1163 lai->primitive_type_vector = GDBARCH_OBSTACK_CALLOC (gdbarch, 1,
1167 const struct language_defn unknown_language_defn =
1176 &exp_descriptor_standard,
1180 unk_lang_printchar, /* Print character constant */
1183 unk_lang_print_type, /* Print a type using appropriate syntax */
1184 default_print_typedef, /* Print a typedef using appropriate syntax */
1185 unk_lang_val_print, /* Print a value using appropriate syntax */
1186 unk_lang_value_print, /* Print a top-level value */
1187 unk_lang_trampoline, /* Language specific skip_trampoline */
1188 "this", /* name_of_this */
1189 basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
1190 basic_lookup_transparent_type,/* lookup_transparent_type */
1191 unk_lang_demangle, /* Language specific symbol demangler */
1192 unk_lang_class_name, /* Language specific
1193 class_name_from_physname */
1194 unk_op_print_tab, /* expression operators for printing */
1195 1, /* c-style arrays */
1196 0, /* String lower bound */
1197 default_word_break_characters,
1198 default_make_symbol_completion_list,
1199 unknown_language_arch_info, /* la_language_arch_info. */
1200 default_print_array_index,
1201 default_pass_by_reference,
1206 /* These two structs define fake entries for the "local" and "auto" options. */
1207 const struct language_defn auto_language_defn =
1216 &exp_descriptor_standard,
1220 unk_lang_printchar, /* Print character constant */
1223 unk_lang_print_type, /* Print a type using appropriate syntax */
1224 default_print_typedef, /* Print a typedef using appropriate syntax */
1225 unk_lang_val_print, /* Print a value using appropriate syntax */
1226 unk_lang_value_print, /* Print a top-level value */
1227 unk_lang_trampoline, /* Language specific skip_trampoline */
1228 "this", /* name_of_this */
1229 basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
1230 basic_lookup_transparent_type,/* lookup_transparent_type */
1231 unk_lang_demangle, /* Language specific symbol demangler */
1232 unk_lang_class_name, /* Language specific
1233 class_name_from_physname */
1234 unk_op_print_tab, /* expression operators for printing */
1235 1, /* c-style arrays */
1236 0, /* String lower bound */
1237 default_word_break_characters,
1238 default_make_symbol_completion_list,
1239 unknown_language_arch_info, /* la_language_arch_info. */
1240 default_print_array_index,
1241 default_pass_by_reference,
1246 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 default_print_typedef, /* Print a typedef using appropriate syntax */
1264 unk_lang_val_print, /* Print a value using appropriate syntax */
1265 unk_lang_value_print, /* Print a top-level value */
1266 unk_lang_trampoline, /* Language specific skip_trampoline */
1267 "this", /* name_of_this */
1268 basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
1269 basic_lookup_transparent_type,/* lookup_transparent_type */
1270 unk_lang_demangle, /* Language specific symbol demangler */
1271 unk_lang_class_name, /* Language specific
1272 class_name_from_physname */
1273 unk_op_print_tab, /* expression operators for printing */
1274 1, /* c-style arrays */
1275 0, /* String lower bound */
1276 default_word_break_characters,
1277 default_make_symbol_completion_list,
1278 unknown_language_arch_info, /* la_language_arch_info. */
1279 default_print_array_index,
1280 default_pass_by_reference,
1285 /* Per-architecture language information. */
1287 static struct gdbarch_data *language_gdbarch_data;
1289 struct language_gdbarch
1291 /* A vector of per-language per-architecture info. Indexed by "enum
1293 struct language_arch_info arch_info[nr_languages];
1297 language_gdbarch_post_init (struct gdbarch *gdbarch)
1299 struct language_gdbarch *l;
1302 l = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct language_gdbarch);
1303 for (i = 0; i < languages_size; i++)
1305 if (languages[i] != NULL
1306 && languages[i]->la_language_arch_info != NULL)
1307 languages[i]->la_language_arch_info
1308 (gdbarch, l->arch_info + languages[i]->la_language);
1314 language_string_char_type (const struct language_defn *la,
1315 struct gdbarch *gdbarch)
1317 struct language_gdbarch *ld = gdbarch_data (gdbarch,
1318 language_gdbarch_data);
1320 return ld->arch_info[la->la_language].string_char_type;
1324 language_bool_type (const struct language_defn *la,
1325 struct gdbarch *gdbarch)
1327 struct language_gdbarch *ld = gdbarch_data (gdbarch,
1328 language_gdbarch_data);
1330 if (ld->arch_info[la->la_language].bool_type_symbol)
1334 sym = lookup_symbol (ld->arch_info[la->la_language].bool_type_symbol,
1335 NULL, VAR_DOMAIN, NULL);
1338 struct type *type = SYMBOL_TYPE (sym);
1340 if (type && TYPE_CODE (type) == TYPE_CODE_BOOL)
1345 return ld->arch_info[la->la_language].bool_type_default;
1349 language_lookup_primitive_type_by_name (const struct language_defn *la,
1350 struct gdbarch *gdbarch,
1353 struct language_gdbarch *ld = gdbarch_data (gdbarch,
1354 language_gdbarch_data);
1355 struct type *const *p;
1357 for (p = ld->arch_info[la->la_language].primitive_type_vector;
1361 if (strcmp (TYPE_NAME (*p), name) == 0)
1367 /* Initialize the language routines */
1370 _initialize_language (void)
1372 static const char *type_or_range_names[]
1373 = { "on", "off", "warn", "auto", NULL };
1375 static const char *case_sensitive_names[]
1376 = { "on", "off", "auto", NULL };
1378 language_gdbarch_data
1379 = gdbarch_data_register_post_init (language_gdbarch_post_init);
1381 /* GDB commands for language specific stuff */
1383 add_prefix_cmd ("check", no_class, set_check,
1384 _("Set the status of the type/range checker."),
1385 &setchecklist, "set check ", 0, &setlist);
1386 add_alias_cmd ("c", "check", no_class, 1, &setlist);
1387 add_alias_cmd ("ch", "check", no_class, 1, &setlist);
1389 add_prefix_cmd ("check", no_class, show_check,
1390 _("Show the status of the type/range checker."),
1391 &showchecklist, "show check ", 0, &showlist);
1392 add_alias_cmd ("c", "check", no_class, 1, &showlist);
1393 add_alias_cmd ("ch", "check", no_class, 1, &showlist);
1395 add_setshow_enum_cmd ("type", class_support, type_or_range_names, &type,
1396 _("Set type checking. (on/warn/off/auto)"),
1397 _("Show type checking. (on/warn/off/auto)"),
1398 NULL, set_type_command,
1400 &setchecklist, &showchecklist);
1402 add_setshow_enum_cmd ("range", class_support, type_or_range_names,
1404 _("Set range checking. (on/warn/off/auto)"),
1405 _("Show range checking. (on/warn/off/auto)"),
1406 NULL, set_range_command,
1408 &setchecklist, &showchecklist);
1410 add_setshow_enum_cmd ("case-sensitive", class_support, case_sensitive_names,
1411 &case_sensitive, _("\
1412 Set case sensitivity in name search. (on/off/auto)"), _("\
1413 Show case sensitivity in name search. (on/off/auto)"), _("\
1414 For Fortran the default is off; for other languages the default is on."),
1417 &setlist, &showlist);
1419 add_language (&auto_language_defn);
1420 add_language (&local_language_defn);
1421 add_language (&unknown_language_defn);
1423 language = xstrdup ("auto");
1424 type = xstrdup ("auto");
1425 range = xstrdup ("auto");
1426 case_sensitive = xstrdup ("auto");
1428 /* Have the above take effect */
1429 set_language (language_auto);