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c906108c | 1 | /* Source-language-related definitions for GDB. |
1bac305b | 2 | |
6aba47ca DJ |
3 | Copyright (C) 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2000, 2003, 2004, |
4 | 2007 Free Software Foundation, Inc. | |
1bac305b | 5 | |
c906108c SS |
6 | Contributed by the Department of Computer Science at the State University |
7 | of New York at Buffalo. | |
8 | ||
c5aa993b | 9 | This file is part of GDB. |
c906108c | 10 | |
c5aa993b JM |
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 | |
a9762ec7 | 13 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 14 | (at your option) any later version. |
c906108c | 15 | |
c5aa993b JM |
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. | |
c906108c | 20 | |
c5aa993b | 21 | You should have received a copy of the GNU General Public License |
a9762ec7 | 22 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
23 | |
24 | #if !defined (LANGUAGE_H) | |
25 | #define LANGUAGE_H 1 | |
26 | ||
104c1213 | 27 | /* Forward decls for prototypes */ |
c906108c SS |
28 | struct value; |
29 | struct objfile; | |
52f729a7 | 30 | struct frame_info; |
c906108c | 31 | struct expression; |
da3331ec AC |
32 | struct ui_file; |
33 | ||
c5aa993b | 34 | /* enum exp_opcode; ANSI's `wisdom' didn't include forward enum decls. */ |
c906108c SS |
35 | |
36 | /* This used to be included to configure GDB for one or more specific | |
7e73cedf | 37 | languages. Now it is left out to configure for all of them. FIXME. */ |
c906108c SS |
38 | /* #include "lang_def.h" */ |
39 | #define _LANG_c | |
40 | #define _LANG_m2 | |
750ba382 PM |
41 | #define _LANG_fortran |
42 | #define _LANG_pascal | |
c906108c | 43 | |
c5aa993b | 44 | #define MAX_FORTRAN_DIMS 7 /* Maximum number of F77 array dims */ |
c906108c SS |
45 | |
46 | /* range_mode == | |
47 | range_mode_auto: range_check set automatically to default of language. | |
48 | range_mode_manual: range_check set manually by user. */ | |
49 | ||
c5aa993b JM |
50 | extern enum range_mode |
51 | { | |
52 | range_mode_auto, range_mode_manual | |
53 | } | |
54 | range_mode; | |
c906108c SS |
55 | |
56 | /* range_check == | |
57 | range_check_on: Ranges are checked in GDB expressions, producing errors. | |
58 | range_check_warn: Ranges are checked, producing warnings. | |
59 | range_check_off: Ranges are not checked in GDB expressions. */ | |
60 | ||
61 | extern enum range_check | |
c5aa993b JM |
62 | { |
63 | range_check_off, range_check_warn, range_check_on | |
64 | } | |
65 | range_check; | |
c906108c SS |
66 | |
67 | /* type_mode == | |
68 | type_mode_auto: type_check set automatically to default of language | |
69 | type_mode_manual: type_check set manually by user. */ | |
70 | ||
c5aa993b JM |
71 | extern enum type_mode |
72 | { | |
73 | type_mode_auto, type_mode_manual | |
74 | } | |
75 | type_mode; | |
c906108c SS |
76 | |
77 | /* type_check == | |
78 | type_check_on: Types are checked in GDB expressions, producing errors. | |
79 | type_check_warn: Types are checked, producing warnings. | |
80 | type_check_off: Types are not checked in GDB expressions. */ | |
81 | ||
82 | extern enum type_check | |
c5aa993b JM |
83 | { |
84 | type_check_off, type_check_warn, type_check_on | |
85 | } | |
86 | type_check; | |
63872f9d JG |
87 | |
88 | /* case_mode == | |
89 | case_mode_auto: case_sensitivity set upon selection of scope | |
90 | case_mode_manual: case_sensitivity set only by user. */ | |
91 | ||
92 | extern enum case_mode | |
93 | { | |
94 | case_mode_auto, case_mode_manual | |
95 | } | |
96 | case_mode; | |
97 | ||
7ca2d3a3 DL |
98 | /* array_ordering == |
99 | array_row_major: Arrays are in row major order | |
100 | array_column_major: Arrays are in column major order.*/ | |
101 | ||
102 | extern enum array_ordering | |
103 | { | |
104 | array_row_major, array_column_major | |
105 | } | |
106 | array_ordering; | |
107 | ||
108 | ||
63872f9d JG |
109 | /* case_sensitivity == |
110 | case_sensitive_on: Case sensitivity in name matching is used | |
111 | case_sensitive_off: Case sensitivity in name matching is not used */ | |
112 | ||
113 | extern enum case_sensitivity | |
114 | { | |
115 | case_sensitive_on, case_sensitive_off | |
116 | } | |
117 | case_sensitivity; | |
c906108c | 118 | \f |
f290d38e AC |
119 | /* Per architecture (OS/ABI) language information. */ |
120 | ||
121 | struct language_arch_info | |
122 | { | |
5a44ea29 | 123 | /* Its primitive types. This is a vector ended by a NULL pointer. |
f290d38e AC |
124 | These types can be specified by name in parsing types in |
125 | expressions, regardless of whether the program being debugged | |
126 | actually defines such a type. */ | |
5a44ea29 | 127 | struct type **primitive_type_vector; |
f290d38e AC |
128 | /* Type of elements of strings. */ |
129 | struct type *string_char_type; | |
130 | }; | |
131 | ||
132 | struct type *language_string_char_type (const struct language_defn *l, | |
133 | struct gdbarch *gdbarch); | |
134 | ||
5a44ea29 | 135 | struct type *language_lookup_primitive_type_by_name (const struct language_defn *l, |
f290d38e AC |
136 | struct gdbarch *gdbarch, |
137 | const char *name); | |
138 | ||
c906108c SS |
139 | /* Structure tying together assorted information about a language. */ |
140 | ||
141 | struct language_defn | |
c5aa993b JM |
142 | { |
143 | /* Name of the language */ | |
c906108c | 144 | |
c5aa993b | 145 | char *la_name; |
c906108c | 146 | |
c5aa993b | 147 | /* its symtab language-enum (defs.h) */ |
c906108c | 148 | |
c5aa993b | 149 | enum language la_language; |
c906108c | 150 | |
c5aa993b | 151 | /* Default range checking */ |
c906108c | 152 | |
c5aa993b | 153 | enum range_check la_range_check; |
c906108c | 154 | |
c5aa993b | 155 | /* Default type checking */ |
c906108c | 156 | |
c5aa993b | 157 | enum type_check la_type_check; |
c906108c | 158 | |
63872f9d JG |
159 | /* Default case sensitivity */ |
160 | enum case_sensitivity la_case_sensitivity; | |
161 | ||
7ca2d3a3 DL |
162 | /* Multi-dimensional array ordering */ |
163 | enum array_ordering la_array_ordering; | |
164 | ||
5f9769d1 PH |
165 | /* Definitions related to expression printing, prefixifying, and |
166 | dumping */ | |
167 | ||
168 | const struct exp_descriptor *la_exp_desc; | |
169 | ||
c5aa993b | 170 | /* Parser function. */ |
c906108c | 171 | |
507f3c78 | 172 | int (*la_parser) (void); |
c906108c | 173 | |
c5aa993b | 174 | /* Parser error function */ |
c906108c | 175 | |
507f3c78 | 176 | void (*la_error) (char *); |
c906108c | 177 | |
e85c3284 PH |
178 | /* Given an expression *EXPP created by prefixifying the result of |
179 | la_parser, perform any remaining processing necessary to complete | |
180 | its translation. *EXPP may change; la_post_parser is responsible | |
181 | for releasing its previous contents, if necessary. If | |
182 | VOID_CONTEXT_P, then no value is expected from the expression. */ | |
183 | ||
184 | void (*la_post_parser) (struct expression ** expp, int void_context_p); | |
185 | ||
d9fcf2fb | 186 | void (*la_printchar) (int ch, struct ui_file * stream); |
c906108c | 187 | |
fc1a4b47 | 188 | void (*la_printstr) (struct ui_file * stream, const gdb_byte *string, |
d9fcf2fb JM |
189 | unsigned int length, int width, |
190 | int force_ellipses); | |
c906108c | 191 | |
d9fcf2fb | 192 | void (*la_emitchar) (int ch, struct ui_file * stream, int quoter); |
c906108c | 193 | |
c5aa993b | 194 | /* Print a type using syntax appropriate for this language. */ |
c906108c | 195 | |
d9fcf2fb JM |
196 | void (*la_print_type) (struct type *, char *, struct ui_file *, int, |
197 | int); | |
c906108c | 198 | |
c5aa993b | 199 | /* Print a value using syntax appropriate for this language. */ |
c906108c | 200 | |
fc1a4b47 | 201 | int (*la_val_print) (struct type *, const gdb_byte *, int, CORE_ADDR, |
d9fcf2fb JM |
202 | struct ui_file *, int, int, int, |
203 | enum val_prettyprint); | |
c906108c | 204 | |
c5aa993b | 205 | /* Print a top-level value using syntax appropriate for this language. */ |
c906108c | 206 | |
d9fcf2fb JM |
207 | int (*la_value_print) (struct value *, struct ui_file *, |
208 | int, enum val_prettyprint); | |
c906108c | 209 | |
f636b87d AF |
210 | /* PC is possibly an unknown languages trampoline. |
211 | If that PC falls in a trampoline belonging to this language, | |
212 | return the address of the first pc in the real function, or 0 | |
213 | if it isn't a language tramp for this language. */ | |
52f729a7 | 214 | CORE_ADDR (*skip_trampoline) (struct frame_info *, CORE_ADDR); |
f636b87d | 215 | |
5f9a71c3 DC |
216 | /* Now come some hooks for lookup_symbol. */ |
217 | ||
218 | /* If this is non-NULL, lookup_symbol will do the 'field_of_this' | |
219 | check, using this function to find the value of this. */ | |
220 | ||
221 | /* FIXME: carlton/2003-05-19: Audit all the language_defn structs | |
222 | to make sure we're setting this appropriately: I'm sure it | |
223 | could be NULL in more languages. */ | |
224 | ||
225 | struct value *(*la_value_of_this) (int complain); | |
226 | ||
227 | /* This is a function that lookup_symbol will call when it gets to | |
228 | the part of symbol lookup where C looks up static and global | |
229 | variables. */ | |
230 | ||
231 | struct symbol *(*la_lookup_symbol_nonlocal) (const char *, | |
232 | const char *, | |
233 | const struct block *, | |
234 | const domain_enum, | |
235 | struct symtab **); | |
236 | ||
b368761e DC |
237 | /* Find the definition of the type with the given name. */ |
238 | struct type *(*la_lookup_transparent_type) (const char *); | |
239 | ||
9a3d7dfd AF |
240 | /* Return demangled language symbol, or NULL. */ |
241 | char *(*la_demangle) (const char *mangled, int options); | |
242 | ||
31c27f77 JJ |
243 | /* Return class name of a mangled method name or NULL. */ |
244 | char *(*la_class_name_from_physname) (const char *physname); | |
245 | ||
c5aa993b | 246 | /* Table for printing expressions */ |
c906108c | 247 | |
c5aa993b | 248 | const struct op_print *la_op_print_tab; |
c906108c | 249 | |
c5aa993b JM |
250 | /* Zero if the language has first-class arrays. True if there are no |
251 | array values, and array objects decay to pointers, as in C. */ | |
c906108c | 252 | |
c5aa993b | 253 | char c_style_arrays; |
c906108c | 254 | |
c5aa993b JM |
255 | /* Index to use for extracting the first element of a string. */ |
256 | char string_lower_bound; | |
c906108c | 257 | |
6084f43a JB |
258 | /* The list of characters forming word boundaries. */ |
259 | char *(*la_word_break_characters) (void); | |
260 | ||
f290d38e AC |
261 | /* The per-architecture (OS/ABI) language information. */ |
262 | void (*la_language_arch_info) (struct gdbarch *, | |
263 | struct language_arch_info *); | |
264 | ||
e79af960 JB |
265 | /* Print the index of an element of an array. */ |
266 | void (*la_print_array_index) (struct value *index_value, | |
267 | struct ui_file *stream, | |
268 | int format, | |
269 | enum val_prettyprint pretty); | |
270 | ||
41f1b697 DJ |
271 | /* Return non-zero if TYPE should be passed (and returned) by |
272 | reference at the language level. */ | |
273 | int (*la_pass_by_reference) (struct type *type); | |
274 | ||
c5aa993b JM |
275 | /* Add fields above this point, so the magic number is always last. */ |
276 | /* Magic number for compat checking */ | |
277 | ||
278 | long la_magic; | |
279 | ||
280 | }; | |
c906108c SS |
281 | |
282 | #define LANG_MAGIC 910823L | |
283 | ||
284 | /* Pointer to the language_defn for our current language. This pointer | |
285 | always points to *some* valid struct; it can be used without checking | |
286 | it for validity. | |
287 | ||
288 | The current language affects expression parsing and evaluation | |
289 | (FIXME: it might be cleaner to make the evaluation-related stuff | |
290 | separate exp_opcodes for each different set of semantics. We | |
291 | should at least think this through more clearly with respect to | |
292 | what happens if the language is changed between parsing and | |
293 | evaluation) and printing of things like types and arrays. It does | |
294 | *not* affect symbol-reading-- each source file in a symbol-file has | |
295 | its own language and we should keep track of that regardless of the | |
296 | language when symbols are read. If we want some manual setting for | |
297 | the language of symbol files (e.g. detecting when ".c" files are | |
7e73cedf | 298 | C++), it should be a separate setting from the current_language. */ |
c906108c SS |
299 | |
300 | extern const struct language_defn *current_language; | |
301 | ||
302 | /* Pointer to the language_defn expected by the user, e.g. the language | |
303 | of main(), or the language we last mentioned in a message, or C. */ | |
304 | ||
305 | extern const struct language_defn *expected_language; | |
306 | ||
307 | /* language_mode == | |
308 | language_mode_auto: current_language automatically set upon selection | |
c5aa993b | 309 | of scope (e.g. stack frame) |
c906108c SS |
310 | language_mode_manual: current_language set only by user. */ |
311 | ||
312 | extern enum language_mode | |
c5aa993b JM |
313 | { |
314 | language_mode_auto, language_mode_manual | |
315 | } | |
316 | language_mode; | |
c906108c SS |
317 | \f |
318 | /* These macros define the behaviour of the expression | |
319 | evaluator. */ | |
320 | ||
321 | /* Should we strictly type check expressions? */ | |
322 | #define STRICT_TYPE (type_check != type_check_off) | |
323 | ||
324 | /* Should we range check values against the domain of their type? */ | |
325 | #define RANGE_CHECK (range_check != range_check_off) | |
326 | ||
327 | /* "cast" really means conversion */ | |
328 | /* FIXME -- should be a setting in language_defn */ | |
329 | #define CAST_IS_CONVERSION (current_language->la_language == language_c || \ | |
806e6073 AF |
330 | current_language->la_language == language_cplus || \ |
331 | current_language->la_language == language_objc) | |
c906108c | 332 | |
a14ed312 | 333 | extern void language_info (int); |
c906108c | 334 | |
a14ed312 | 335 | extern enum language set_language (enum language); |
c906108c | 336 | \f |
c5aa993b | 337 | |
c906108c SS |
338 | /* This page contains functions that return things that are |
339 | specific to languages. Each of these functions is based on | |
340 | the current setting of working_lang, which the user sets | |
341 | with the "set language" command. */ | |
342 | ||
c906108c SS |
343 | #define LA_PRINT_TYPE(type,varstring,stream,show,level) \ |
344 | (current_language->la_print_type(type,varstring,stream,show,level)) | |
345 | ||
346 | #define LA_VAL_PRINT(type,valaddr,offset,addr,stream,fmt,deref,recurse,pretty) \ | |
347 | (current_language->la_val_print(type,valaddr,offset,addr,stream,fmt,deref, \ | |
348 | recurse,pretty)) | |
349 | #define LA_VALUE_PRINT(val,stream,fmt,pretty) \ | |
350 | (current_language->la_value_print(val,stream,fmt,pretty)) | |
351 | ||
c906108c SS |
352 | #define LA_PRINT_CHAR(ch, stream) \ |
353 | (current_language->la_printchar(ch, stream)) | |
354 | #define LA_PRINT_STRING(stream, string, length, width, force_ellipses) \ | |
355 | (current_language->la_printstr(stream, string, length, width, force_ellipses)) | |
356 | #define LA_EMIT_CHAR(ch, stream, quoter) \ | |
357 | (current_language->la_emitchar(ch, stream, quoter)) | |
358 | ||
e79af960 JB |
359 | #define LA_PRINT_ARRAY_INDEX(index_value, stream, format, pretty) \ |
360 | (current_language->la_print_array_index(index_value, stream, format, pretty)) | |
361 | ||
c906108c SS |
362 | /* Test a character to decide whether it can be printed in literal form |
363 | or needs to be printed in another representation. For example, | |
364 | in C the literal form of the character with octal value 141 is 'a' | |
365 | and the "other representation" is '\141'. The "other representation" | |
366 | is program language dependent. */ | |
367 | ||
368 | #define PRINT_LITERAL_FORM(c) \ | |
369 | ((c) >= 0x20 \ | |
370 | && ((c) < 0x7F || (c) >= 0xA0) \ | |
371 | && (!sevenbit_strings || (c) < 0x80)) | |
372 | ||
7acb79c8 AC |
373 | #if 0 |
374 | /* FIXME: cagney/2000-03-04: This function does not appear to be used. | |
375 | It can be deleted once 5.0 has been released. */ | |
c4093a6a JM |
376 | /* Return a string that contains the hex digits of the number. No preceeding |
377 | "0x" */ | |
378 | ||
a14ed312 | 379 | extern char *longest_raw_hex_string (LONGEST); |
7acb79c8 | 380 | #endif |
c4093a6a | 381 | |
c906108c SS |
382 | /* Type predicates */ |
383 | ||
a14ed312 | 384 | extern int simple_type (struct type *); |
c906108c | 385 | |
a14ed312 | 386 | extern int ordered_type (struct type *); |
c906108c | 387 | |
a14ed312 | 388 | extern int same_type (struct type *, struct type *); |
c906108c | 389 | |
a14ed312 | 390 | extern int integral_type (struct type *); |
c906108c | 391 | |
a14ed312 | 392 | extern int numeric_type (struct type *); |
c906108c | 393 | |
a14ed312 | 394 | extern int character_type (struct type *); |
c906108c | 395 | |
a14ed312 | 396 | extern int boolean_type (struct type *); |
c906108c | 397 | |
a14ed312 | 398 | extern int float_type (struct type *); |
c906108c | 399 | |
a14ed312 | 400 | extern int pointer_type (struct type *); |
c906108c | 401 | |
a14ed312 | 402 | extern int structured_type (struct type *); |
c906108c SS |
403 | |
404 | /* Checks Binary and Unary operations for semantic type correctness */ | |
405 | /* FIXME: Does not appear to be used */ | |
406 | #define unop_type_check(v,o) binop_type_check((v),NULL,(o)) | |
407 | ||
a14ed312 | 408 | extern void binop_type_check (struct value *, struct value *, int); |
c906108c SS |
409 | |
410 | /* Error messages */ | |
411 | ||
98b3ab73 AC |
412 | extern void op_error (const char *lhs, enum exp_opcode, |
413 | const char *rhs); | |
c906108c | 414 | |
ddfe3c15 | 415 | extern void type_error (const char *, ...) ATTR_FORMAT (printf, 1, 2); |
c906108c | 416 | |
ddfe3c15 | 417 | extern void range_error (const char *, ...) ATTR_FORMAT (printf, 1, 2); |
c906108c SS |
418 | |
419 | /* Data: Does this value represent "truth" to the current language? */ | |
420 | ||
a14ed312 | 421 | extern int value_true (struct value *); |
c906108c | 422 | |
a14ed312 | 423 | extern struct type *lang_bool_type (void); |
c906108c SS |
424 | |
425 | /* The type used for Boolean values in the current language. */ | |
426 | #define LA_BOOL_TYPE lang_bool_type () | |
427 | ||
428 | /* Misc: The string representing a particular enum language. */ | |
429 | ||
a14ed312 | 430 | extern enum language language_enum (char *str); |
c906108c | 431 | |
a14ed312 | 432 | extern const struct language_defn *language_def (enum language); |
7a292a7a | 433 | |
a14ed312 | 434 | extern char *language_str (enum language); |
c906108c SS |
435 | |
436 | /* Add a language to the set known by GDB (at initialization time). */ | |
437 | ||
a14ed312 | 438 | extern void add_language (const struct language_defn *); |
c906108c | 439 | |
a14ed312 | 440 | extern enum language get_frame_language (void); /* In stack.c */ |
c906108c | 441 | |
f636b87d AF |
442 | /* Check for a language-specific trampoline. */ |
443 | ||
52f729a7 | 444 | extern CORE_ADDR skip_language_trampoline (struct frame_info *, CORE_ADDR pc); |
f636b87d | 445 | |
9a3d7dfd AF |
446 | /* Return demangled language symbol, or NULL. */ |
447 | extern char *language_demangle (const struct language_defn *current_language, | |
448 | const char *mangled, int options); | |
449 | ||
31c27f77 JJ |
450 | /* Return class name from physname, or NULL. */ |
451 | extern char *language_class_name_from_physname (const struct language_defn *, | |
452 | const char *physname); | |
453 | ||
9f0a5303 JB |
454 | /* Splitting strings into words. */ |
455 | extern char *default_word_break_characters (void); | |
456 | ||
e79af960 JB |
457 | /* Print the index of an array element using the C99 syntax. */ |
458 | extern void default_print_array_index (struct value *index_value, | |
459 | struct ui_file *stream, | |
460 | int format, | |
461 | enum val_prettyprint pretty); | |
462 | ||
41f1b697 DJ |
463 | /* Return non-zero if TYPE should be passed (and returned) by |
464 | reference at the language level. */ | |
465 | int language_pass_by_reference (struct type *type); | |
466 | ||
467 | /* Return zero; by default, types are passed by value at the language | |
468 | level. The target ABI may pass or return some structs by reference | |
469 | independent of this. */ | |
470 | int default_pass_by_reference (struct type *type); | |
471 | ||
c5aa993b | 472 | #endif /* defined (LANGUAGE_H) */ |