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
429 set_language (enum language lang)
432 enum language prev_language;
434 prev_language = current_language->la_language;
436 for (i = 0; i < languages_size; i++)
438 if (languages[i]->la_language == lang)
440 current_language = languages[i];
441 set_type_range_case ();
446 return prev_language;
450 /* Print out the current language settings: language, range and
451 type checking. If QUIETLY, print only what has changed. */
454 language_info (int quietly)
456 if (quietly && expected_language == current_language)
459 expected_language = current_language;
460 printf_unfiltered (_("Current language: %s\n"), language);
461 show_language_command (NULL, 1, NULL, NULL);
465 printf_unfiltered (_("Type checking: %s\n"), type);
466 show_type_command (NULL, 1, NULL, NULL);
467 printf_unfiltered (_("Range checking: %s\n"), range);
468 show_range_command (NULL, 1, NULL, NULL);
469 printf_unfiltered (_("Case sensitivity: %s\n"), case_sensitive);
470 show_case_command (NULL, 1, NULL, NULL);
474 /* Return the result of a binary operation. */
476 #if 0 /* Currently unused */
479 binop_result_type (struct value *v1, struct value *v2)
482 struct type *t1 = check_typedef (VALUE_TYPE (v1));
483 struct type *t2 = check_typedef (VALUE_TYPE (v2));
485 int l1 = TYPE_LENGTH (t1);
486 int l2 = TYPE_LENGTH (t2);
488 switch (current_language->la_language)
494 if (TYPE_CODE (t1) == TYPE_CODE_FLT)
495 return TYPE_CODE (t2) == TYPE_CODE_FLT && l2 > l1 ?
496 VALUE_TYPE (v2) : VALUE_TYPE (v1);
497 else if (TYPE_CODE (t2) == TYPE_CODE_FLT)
498 return TYPE_CODE (t1) == TYPE_CODE_FLT && l1 > l2 ?
499 VALUE_TYPE (v1) : VALUE_TYPE (v2);
500 else if (TYPE_UNSIGNED (t1) && l1 > l2)
501 return VALUE_TYPE (v1);
502 else if (TYPE_UNSIGNED (t2) && l2 > l1)
503 return VALUE_TYPE (v2);
504 else /* Both are signed. Result is the
506 return l1 > l2 ? VALUE_TYPE (v1) : VALUE_TYPE (v2);
509 /* If we are doing type-checking, l1 should equal l2, so this is
511 return l1 > l2 ? VALUE_TYPE (v1) : VALUE_TYPE (v2);
514 internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
515 return (struct type *) 0; /* For lint */
520 /* This page contains functions that are used in type/range checking.
521 They all return zero if the type/range check fails.
523 It is hoped that these will make extending GDB to parse different
524 languages a little easier. These are primarily used in eval.c when
525 evaluating expressions and making sure that their types are correct.
526 Instead of having a mess of conjucted/disjuncted expressions in an "if",
527 the ideas of type can be wrapped up in the following functions.
529 Note that some of them are not currently dependent upon which language
530 is currently being parsed. For example, floats are the same in
531 C and Modula-2 (ie. the only floating point type has TYPE_CODE of
532 TYPE_CODE_FLT), while booleans are different. */
534 /* Returns non-zero if its argument is a simple type. This is the same for
535 both Modula-2 and for C. In the C case, TYPE_CODE_CHAR will never occur,
536 and thus will never cause the failure of the test. */
538 simple_type (struct type *type)
540 CHECK_TYPEDEF (type);
541 switch (TYPE_CODE (type))
547 case TYPE_CODE_RANGE:
556 /* Returns non-zero if its argument is of an ordered type.
557 An ordered type is one in which the elements can be tested for the
558 properties of "greater than", "less than", etc, or for which the
559 operations "increment" or "decrement" make sense. */
561 ordered_type (struct type *type)
563 CHECK_TYPEDEF (type);
564 switch (TYPE_CODE (type))
570 case TYPE_CODE_RANGE:
578 /* Returns non-zero if the two types are the same. */
580 same_type (struct type *arg1, struct type *arg2)
582 CHECK_TYPEDEF (type);
583 if (structured_type (arg1)
584 ? !structured_type (arg2) : structured_type (arg2))
585 /* One is structured and one isn't. */
587 else if (structured_type (arg1) && structured_type (arg2))
589 else if (numeric_type (arg1) && numeric_type (arg2))
590 return (TYPE_CODE (arg2) == TYPE_CODE (arg1)) &&
591 (TYPE_UNSIGNED (arg1) == TYPE_UNSIGNED (arg2))
597 /* Returns non-zero if the type is integral. */
599 integral_type (struct type *type)
601 CHECK_TYPEDEF (type);
602 switch (current_language->la_language)
608 return (TYPE_CODE (type) != TYPE_CODE_INT) &&
609 (TYPE_CODE (type) != TYPE_CODE_ENUM) ? 0 : 1;
611 case language_pascal:
612 return TYPE_CODE (type) != TYPE_CODE_INT ? 0 : 1;
614 error (_("Language not supported."));
618 /* Returns non-zero if the value is numeric. */
620 numeric_type (struct type *type)
622 CHECK_TYPEDEF (type);
623 switch (TYPE_CODE (type))
634 /* Returns non-zero if the value is a character type. */
636 character_type (struct type *type)
638 CHECK_TYPEDEF (type);
639 switch (current_language->la_language)
642 case language_pascal:
643 return TYPE_CODE (type) != TYPE_CODE_CHAR ? 0 : 1;
649 return (TYPE_CODE (type) == TYPE_CODE_INT) &&
650 TYPE_LENGTH (type) == sizeof (char)
657 /* Returns non-zero if the value is a string type. */
659 string_type (struct type *type)
661 CHECK_TYPEDEF (type);
662 switch (current_language->la_language)
665 case language_pascal:
666 return TYPE_CODE (type) != TYPE_CODE_STRING ? 0 : 1;
672 /* C does not have distinct string type. */
679 /* Returns non-zero if the value is a boolean type. */
681 boolean_type (struct type *type)
683 CHECK_TYPEDEF (type);
684 if (TYPE_CODE (type) == TYPE_CODE_BOOL)
686 switch (current_language->la_language)
692 /* Might be more cleanly handled by having a
693 TYPE_CODE_INT_NOT_BOOL for (the deleted) CHILL and such
694 languages, or a TYPE_CODE_INT_OR_BOOL for C. */
695 if (TYPE_CODE (type) == TYPE_CODE_INT)
703 /* Returns non-zero if the value is a floating-point type. */
705 float_type (struct type *type)
707 CHECK_TYPEDEF (type);
708 return TYPE_CODE (type) == TYPE_CODE_FLT;
712 /* Returns non-zero if the value is a pointer type. */
714 pointer_type (struct type *type)
716 return TYPE_CODE (type) == TYPE_CODE_PTR ||
717 TYPE_CODE (type) == TYPE_CODE_REF;
721 /* Returns non-zero if the value is a structured type. */
723 structured_type (struct type *type)
725 CHECK_TYPEDEF (type);
726 switch (current_language->la_language)
732 return (TYPE_CODE (type) == TYPE_CODE_STRUCT) ||
733 (TYPE_CODE (type) == TYPE_CODE_UNION) ||
734 (TYPE_CODE (type) == TYPE_CODE_ARRAY);
735 case language_pascal:
736 return (TYPE_CODE(type) == TYPE_CODE_STRUCT) ||
737 (TYPE_CODE(type) == TYPE_CODE_UNION) ||
738 (TYPE_CODE(type) == TYPE_CODE_SET) ||
739 (TYPE_CODE(type) == TYPE_CODE_ARRAY);
741 return (TYPE_CODE (type) == TYPE_CODE_STRUCT) ||
742 (TYPE_CODE (type) == TYPE_CODE_SET) ||
743 (TYPE_CODE (type) == TYPE_CODE_ARRAY);
750 /* This page contains functions that return info about
751 (struct value) values used in GDB. */
753 /* Returns non-zero if the value VAL represents a true value. */
755 value_true (struct value *val)
757 /* It is possible that we should have some sort of error if a non-boolean
758 value is used in this context. Possibly dependent on some kind of
759 "boolean-checking" option like range checking. But it should probably
760 not depend on the language except insofar as is necessary to identify
761 a "boolean" value (i.e. in C using a float, pointer, etc., as a boolean
762 should be an error, probably). */
763 return !value_logical_not (val);
766 /* This page contains functions for the printing out of
767 error messages that occur during type- and range-
770 /* These are called when a language fails a type- or range-check. The
771 first argument should be a printf()-style format string, and the
772 rest of the arguments should be its arguments. If
773 [type|range]_check is [type|range]_check_on, an error is printed;
774 if [type|range]_check_warn, a warning; otherwise just the
778 type_error (const char *string,...)
782 va_start (args, string);
785 case type_check_warn:
786 vwarning (string, args);
789 verror (string, args);
792 /* FIXME: cagney/2002-01-30: Should this function print anything
793 when type error is off? */
794 vfprintf_filtered (gdb_stderr, string, args);
795 fprintf_filtered (gdb_stderr, "\n");
798 internal_error (__FILE__, __LINE__, _("bad switch"));
804 range_error (const char *string,...)
808 va_start (args, string);
811 case range_check_warn:
812 vwarning (string, args);
815 verror (string, args);
817 case range_check_off:
818 /* FIXME: cagney/2002-01-30: Should this function print anything
819 when range error is off? */
820 vfprintf_filtered (gdb_stderr, string, args);
821 fprintf_filtered (gdb_stderr, "\n");
824 internal_error (__FILE__, __LINE__, _("bad switch"));
830 /* This page contains miscellaneous functions. */
832 /* Return the language enum for a given language string. */
835 language_enum (char *str)
839 for (i = 0; i < languages_size; i++)
840 if (strcmp (languages[i]->la_name, str) == 0)
841 return languages[i]->la_language;
843 return language_unknown;
846 /* Return the language struct for a given language enum. */
848 const struct language_defn *
849 language_def (enum language lang)
853 for (i = 0; i < languages_size; i++)
855 if (languages[i]->la_language == lang)
863 /* Return the language as a string. */
865 language_str (enum language lang)
869 for (i = 0; i < languages_size; i++)
871 if (languages[i]->la_language == lang)
873 return languages[i]->la_name;
880 set_check (char *ignore, int from_tty)
883 "\"set check\" must be followed by the name of a check subcommand.\n");
884 help_list (setchecklist, "set check ", -1, gdb_stdout);
888 show_check (char *ignore, int from_tty)
890 cmd_show_list (showchecklist, from_tty, "");
893 /* Add a language to the set of known languages. */
896 add_language (const struct language_defn *lang)
898 /* For the "set language" command. */
899 static char **language_names = NULL;
900 /* For the "help set language" command. */
901 char *language_set_doc = NULL;
904 struct ui_file *tmp_stream;
906 if (lang->la_magic != LANG_MAGIC)
908 fprintf_unfiltered (gdb_stderr,
909 "Magic number of %s language struct wrong\n",
911 internal_error (__FILE__, __LINE__,
912 _("failed internal consistency check"));
917 languages_allocsize = DEFAULT_ALLOCSIZE;
918 languages = (const struct language_defn **) xmalloc
919 (languages_allocsize * sizeof (*languages));
921 if (languages_size >= languages_allocsize)
923 languages_allocsize *= 2;
924 languages = (const struct language_defn **) xrealloc ((char *) languages,
925 languages_allocsize * sizeof (*languages));
927 languages[languages_size++] = lang;
929 /* Build the language names array, to be used as enumeration in the
930 set language" enum command. */
931 language_names = xrealloc (language_names,
932 (languages_size + 1) * sizeof (const char *));
933 for (i = 0; i < languages_size; ++i)
934 language_names[i] = languages[i]->la_name;
935 language_names[i] = NULL;
937 /* Build the "help set language" docs. */
938 tmp_stream = mem_fileopen ();
940 fprintf_unfiltered (tmp_stream,
941 _("Set the current source language.\n"
942 "The currently understood settings are:\n\nlocal or "
943 "auto Automatic setting based on source file\n"));
945 for (i = 0; i < languages_size; ++i)
947 /* Already dealt with these above. */
948 if (languages[i]->la_language == language_unknown
949 || languages[i]->la_language == language_auto)
952 /* FIXME: i18n: for now assume that the human-readable name
953 is just a capitalization of the internal name. */
954 fprintf_unfiltered (tmp_stream, "%-16s Use the %c%s language\n",
955 languages[i]->la_name,
956 /* Capitalize first letter of language
958 toupper (languages[i]->la_name[0]),
959 languages[i]->la_name + 1);
962 language_set_doc = ui_file_xstrdup (tmp_stream, NULL);
963 ui_file_delete (tmp_stream);
965 add_setshow_enum_cmd ("language", class_support,
966 (const char **) language_names,
969 _("Show the current source language."),
970 NULL, set_language_command,
971 show_language_command,
972 &setlist, &showlist);
974 xfree (language_set_doc);
977 /* Iterate through all registered languages looking for and calling
978 any non-NULL struct language_defn.skip_trampoline() functions.
979 Return the result from the first that returns non-zero, or 0 if all
982 skip_language_trampoline (struct frame_info *frame, CORE_ADDR pc)
986 for (i = 0; i < languages_size; i++)
988 if (languages[i]->skip_trampoline)
990 CORE_ADDR real_pc = (languages[i]->skip_trampoline) (frame, pc);
1000 /* Return demangled language symbol, or NULL.
1001 FIXME: Options are only useful for certain languages and ignored
1002 by others, so it would be better to remove them here and have a
1003 more flexible demangler for the languages that need it.
1004 FIXME: Sometimes the demangler is invoked when we don't know the
1005 language, so we can't use this everywhere. */
1007 language_demangle (const struct language_defn *current_language,
1008 const char *mangled, int options)
1010 if (current_language != NULL && current_language->la_demangle)
1011 return current_language->la_demangle (mangled, options);
1015 /* Return class name from physname or NULL. */
1017 language_class_name_from_physname (const struct language_defn *lang,
1018 const char *physname)
1020 if (lang != NULL && lang->la_class_name_from_physname)
1021 return lang->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"
1208 const struct language_defn auto_language_defn =
1217 &exp_descriptor_standard,
1221 unk_lang_printchar, /* Print character constant */
1224 unk_lang_print_type, /* Print a type using appropriate syntax */
1225 default_print_typedef, /* Print a typedef using appropriate syntax */
1226 unk_lang_val_print, /* Print a value using appropriate syntax */
1227 unk_lang_value_print, /* Print a top-level value */
1228 unk_lang_trampoline, /* Language specific skip_trampoline */
1229 "this", /* name_of_this */
1230 basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
1231 basic_lookup_transparent_type,/* lookup_transparent_type */
1232 unk_lang_demangle, /* Language specific symbol demangler */
1233 unk_lang_class_name, /* Language specific
1234 class_name_from_physname */
1235 unk_op_print_tab, /* expression operators for printing */
1236 1, /* c-style arrays */
1237 0, /* String lower bound */
1238 default_word_break_characters,
1239 default_make_symbol_completion_list,
1240 unknown_language_arch_info, /* la_language_arch_info. */
1241 default_print_array_index,
1242 default_pass_by_reference,
1247 const struct language_defn local_language_defn =
1256 &exp_descriptor_standard,
1260 unk_lang_printchar, /* Print character constant */
1263 unk_lang_print_type, /* Print a type using appropriate syntax */
1264 default_print_typedef, /* Print a typedef using appropriate syntax */
1265 unk_lang_val_print, /* Print a value using appropriate syntax */
1266 unk_lang_value_print, /* Print a top-level value */
1267 unk_lang_trampoline, /* Language specific skip_trampoline */
1268 "this", /* name_of_this */
1269 basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
1270 basic_lookup_transparent_type,/* lookup_transparent_type */
1271 unk_lang_demangle, /* Language specific symbol demangler */
1272 unk_lang_class_name, /* Language specific
1273 class_name_from_physname */
1274 unk_op_print_tab, /* expression operators for printing */
1275 1, /* c-style arrays */
1276 0, /* String lower bound */
1277 default_word_break_characters,
1278 default_make_symbol_completion_list,
1279 unknown_language_arch_info, /* la_language_arch_info. */
1280 default_print_array_index,
1281 default_pass_by_reference,
1286 /* Per-architecture language information. */
1288 static struct gdbarch_data *language_gdbarch_data;
1290 struct language_gdbarch
1292 /* A vector of per-language per-architecture info. Indexed by "enum
1294 struct language_arch_info arch_info[nr_languages];
1298 language_gdbarch_post_init (struct gdbarch *gdbarch)
1300 struct language_gdbarch *l;
1303 l = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct language_gdbarch);
1304 for (i = 0; i < languages_size; i++)
1306 if (languages[i] != NULL
1307 && languages[i]->la_language_arch_info != NULL)
1308 languages[i]->la_language_arch_info
1309 (gdbarch, l->arch_info + languages[i]->la_language);
1315 language_string_char_type (const struct language_defn *la,
1316 struct gdbarch *gdbarch)
1318 struct language_gdbarch *ld = gdbarch_data (gdbarch,
1319 language_gdbarch_data);
1321 return ld->arch_info[la->la_language].string_char_type;
1325 language_bool_type (const struct language_defn *la,
1326 struct gdbarch *gdbarch)
1328 struct language_gdbarch *ld = gdbarch_data (gdbarch,
1329 language_gdbarch_data);
1331 if (ld->arch_info[la->la_language].bool_type_symbol)
1335 sym = lookup_symbol (ld->arch_info[la->la_language].bool_type_symbol,
1336 NULL, VAR_DOMAIN, NULL);
1339 struct type *type = SYMBOL_TYPE (sym);
1341 if (type && TYPE_CODE (type) == TYPE_CODE_BOOL)
1346 return ld->arch_info[la->la_language].bool_type_default;
1350 language_lookup_primitive_type_by_name (const struct language_defn *la,
1351 struct gdbarch *gdbarch,
1354 struct language_gdbarch *ld = gdbarch_data (gdbarch,
1355 language_gdbarch_data);
1356 struct type *const *p;
1358 for (p = ld->arch_info[la->la_language].primitive_type_vector;
1362 if (strcmp (TYPE_NAME (*p), name) == 0)
1368 /* Initialize the language routines. */
1371 _initialize_language (void)
1373 static const char *type_or_range_names[]
1374 = { "on", "off", "warn", "auto", NULL };
1376 static const char *case_sensitive_names[]
1377 = { "on", "off", "auto", NULL };
1379 language_gdbarch_data
1380 = gdbarch_data_register_post_init (language_gdbarch_post_init);
1382 /* GDB commands for language specific stuff. */
1384 add_prefix_cmd ("check", no_class, set_check,
1385 _("Set the status of the type/range checker."),
1386 &setchecklist, "set check ", 0, &setlist);
1387 add_alias_cmd ("c", "check", no_class, 1, &setlist);
1388 add_alias_cmd ("ch", "check", no_class, 1, &setlist);
1390 add_prefix_cmd ("check", no_class, show_check,
1391 _("Show the status of the type/range checker."),
1392 &showchecklist, "show check ", 0, &showlist);
1393 add_alias_cmd ("c", "check", no_class, 1, &showlist);
1394 add_alias_cmd ("ch", "check", no_class, 1, &showlist);
1396 add_setshow_enum_cmd ("type", class_support, type_or_range_names, &type,
1397 _("Set type checking. (on/warn/off/auto)"),
1398 _("Show type checking. (on/warn/off/auto)"),
1399 NULL, set_type_command,
1401 &setchecklist, &showchecklist);
1403 add_setshow_enum_cmd ("range", class_support, type_or_range_names,
1405 _("Set range checking. (on/warn/off/auto)"),
1406 _("Show range checking. (on/warn/off/auto)"),
1407 NULL, set_range_command,
1409 &setchecklist, &showchecklist);
1411 add_setshow_enum_cmd ("case-sensitive", class_support, case_sensitive_names,
1412 &case_sensitive, _("\
1413 Set case sensitivity in name search. (on/off/auto)"), _("\
1414 Show case sensitivity in name search. (on/off/auto)"), _("\
1415 For Fortran the default is off; for other languages the default is on."),
1418 &setlist, &showlist);
1420 add_language (&auto_language_defn);
1421 add_language (&local_language_defn);
1422 add_language (&unknown_language_defn);
1424 language = xstrdup ("auto");
1425 type = xstrdup ("auto");
1426 range = xstrdup ("auto");
1427 case_sensitive = xstrdup ("auto");
1429 /* Have the above take effect. */
1430 set_language (language_auto);