Commit | Line | Data |
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c906108c | 1 | /* Modula 2 language support routines for GDB, the GNU debugger. |
ce27fb25 | 2 | |
e2882c85 | 3 | Copyright (C) 1992-2018 Free Software Foundation, Inc. |
c906108c | 4 | |
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 10 | (at your option) any later version. |
c906108c | 11 | |
c5aa993b JM |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
c906108c | 16 | |
c5aa993b | 17 | You should have received a copy of the GNU General Public License |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
19 | |
20 | #include "defs.h" | |
21 | #include "symtab.h" | |
22 | #include "gdbtypes.h" | |
23 | #include "expression.h" | |
24 | #include "parser-defs.h" | |
25 | #include "language.h" | |
a53b64ea | 26 | #include "varobj.h" |
c906108c SS |
27 | #include "m2-lang.h" |
28 | #include "c-lang.h" | |
745b8ca0 | 29 | #include "valprint.h" |
c906108c | 30 | |
6c7a06a3 TT |
31 | static void m2_printchar (int, struct type *, struct ui_file *); |
32 | static void m2_emit_char (int, struct type *, struct ui_file *, int); | |
c906108c SS |
33 | |
34 | /* Print the character C on STREAM as part of the contents of a literal | |
35 | string whose delimiter is QUOTER. Note that that format for printing | |
36 | characters and strings is language specific. | |
37 | FIXME: This is a copy of the same function from c-exp.y. It should | |
844781a1 | 38 | be replaced with a true Modula version. */ |
c906108c SS |
39 | |
40 | static void | |
6c7a06a3 | 41 | m2_emit_char (int c, struct type *type, struct ui_file *stream, int quoter) |
c906108c SS |
42 | { |
43 | ||
025bb325 | 44 | c &= 0xFF; /* Avoid sign bit follies. */ |
c906108c SS |
45 | |
46 | if (PRINT_LITERAL_FORM (c)) | |
47 | { | |
48 | if (c == '\\' || c == quoter) | |
49 | { | |
50 | fputs_filtered ("\\", stream); | |
51 | } | |
52 | fprintf_filtered (stream, "%c", c); | |
53 | } | |
54 | else | |
55 | { | |
56 | switch (c) | |
57 | { | |
58 | case '\n': | |
59 | fputs_filtered ("\\n", stream); | |
60 | break; | |
61 | case '\b': | |
62 | fputs_filtered ("\\b", stream); | |
63 | break; | |
64 | case '\t': | |
65 | fputs_filtered ("\\t", stream); | |
66 | break; | |
67 | case '\f': | |
68 | fputs_filtered ("\\f", stream); | |
69 | break; | |
70 | case '\r': | |
71 | fputs_filtered ("\\r", stream); | |
72 | break; | |
73 | case '\033': | |
74 | fputs_filtered ("\\e", stream); | |
75 | break; | |
76 | case '\007': | |
77 | fputs_filtered ("\\a", stream); | |
78 | break; | |
79 | default: | |
80 | fprintf_filtered (stream, "\\%.3o", (unsigned int) c); | |
81 | break; | |
82 | } | |
83 | } | |
84 | } | |
85 | ||
86 | /* FIXME: This is a copy of the same function from c-exp.y. It should | |
844781a1 | 87 | be replaced with a true Modula version. */ |
c906108c SS |
88 | |
89 | static void | |
6c7a06a3 | 90 | m2_printchar (int c, struct type *type, struct ui_file *stream) |
c906108c SS |
91 | { |
92 | fputs_filtered ("'", stream); | |
6c7a06a3 | 93 | LA_EMIT_CHAR (c, type, stream, '\''); |
c906108c SS |
94 | fputs_filtered ("'", stream); |
95 | } | |
96 | ||
97 | /* Print the character string STRING, printing at most LENGTH characters. | |
98 | Printing stops early if the number hits print_max; repeat counts | |
99 | are printed as appropriate. Print ellipses at the end if we | |
100 | had to stop before printing LENGTH characters, or if FORCE_ELLIPSES. | |
101 | FIXME: This is a copy of the same function from c-exp.y. It should | |
844781a1 | 102 | be replaced with a true Modula version. */ |
c906108c SS |
103 | |
104 | static void | |
6c7a06a3 | 105 | m2_printstr (struct ui_file *stream, struct type *type, const gdb_byte *string, |
be759fcf | 106 | unsigned int length, const char *encoding, int force_ellipses, |
79a45b7d | 107 | const struct value_print_options *options) |
c906108c | 108 | { |
f86f5ca3 | 109 | unsigned int i; |
c906108c SS |
110 | unsigned int things_printed = 0; |
111 | int in_quotes = 0; | |
112 | int need_comma = 0; | |
c906108c SS |
113 | |
114 | if (length == 0) | |
115 | { | |
116 | fputs_filtered ("\"\"", gdb_stdout); | |
117 | return; | |
118 | } | |
119 | ||
79a45b7d | 120 | for (i = 0; i < length && things_printed < options->print_max; ++i) |
c906108c SS |
121 | { |
122 | /* Position of the character we are examining | |
c5aa993b | 123 | to see whether it is repeated. */ |
c906108c SS |
124 | unsigned int rep1; |
125 | /* Number of repetitions we have detected so far. */ | |
126 | unsigned int reps; | |
127 | ||
128 | QUIT; | |
129 | ||
130 | if (need_comma) | |
131 | { | |
132 | fputs_filtered (", ", stream); | |
133 | need_comma = 0; | |
134 | } | |
135 | ||
136 | rep1 = i + 1; | |
137 | reps = 1; | |
138 | while (rep1 < length && string[rep1] == string[i]) | |
139 | { | |
140 | ++rep1; | |
141 | ++reps; | |
142 | } | |
143 | ||
79a45b7d | 144 | if (reps > options->repeat_count_threshold) |
c906108c SS |
145 | { |
146 | if (in_quotes) | |
147 | { | |
e93a8774 | 148 | fputs_filtered ("\", ", stream); |
c906108c SS |
149 | in_quotes = 0; |
150 | } | |
6c7a06a3 | 151 | m2_printchar (string[i], type, stream); |
c906108c SS |
152 | fprintf_filtered (stream, " <repeats %u times>", reps); |
153 | i = rep1 - 1; | |
79a45b7d | 154 | things_printed += options->repeat_count_threshold; |
c906108c SS |
155 | need_comma = 1; |
156 | } | |
157 | else | |
158 | { | |
159 | if (!in_quotes) | |
160 | { | |
e93a8774 | 161 | fputs_filtered ("\"", stream); |
c906108c SS |
162 | in_quotes = 1; |
163 | } | |
6c7a06a3 | 164 | LA_EMIT_CHAR (string[i], type, stream, '"'); |
c906108c SS |
165 | ++things_printed; |
166 | } | |
167 | } | |
168 | ||
169 | /* Terminate the quotes if necessary. */ | |
170 | if (in_quotes) | |
e93a8774 | 171 | fputs_filtered ("\"", stream); |
c906108c SS |
172 | |
173 | if (force_ellipses || i < length) | |
174 | fputs_filtered ("...", stream); | |
175 | } | |
176 | ||
844781a1 GM |
177 | static struct value * |
178 | evaluate_subexp_modula2 (struct type *expect_type, struct expression *exp, | |
179 | int *pos, enum noside noside) | |
180 | { | |
181 | enum exp_opcode op = exp->elts[*pos].opcode; | |
182 | struct value *arg1; | |
183 | struct value *arg2; | |
184 | struct type *type; | |
b8d56208 | 185 | |
844781a1 GM |
186 | switch (op) |
187 | { | |
188 | case UNOP_HIGH: | |
189 | (*pos)++; | |
190 | arg1 = evaluate_subexp_with_coercion (exp, pos, noside); | |
191 | ||
192 | if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS) | |
193 | return arg1; | |
194 | else | |
195 | { | |
196 | arg1 = coerce_ref (arg1); | |
197 | type = check_typedef (value_type (arg1)); | |
198 | ||
199 | if (m2_is_unbounded_array (type)) | |
200 | { | |
201 | struct value *temp = arg1; | |
b8d56208 | 202 | |
844781a1 GM |
203 | type = TYPE_FIELD_TYPE (type, 1); |
204 | /* i18n: Do not translate the "_m2_high" part! */ | |
205 | arg1 = value_struct_elt (&temp, NULL, "_m2_high", NULL, | |
206 | _("unbounded structure " | |
207 | "missing _m2_high field")); | |
208 | ||
209 | if (value_type (arg1) != type) | |
210 | arg1 = value_cast (type, arg1); | |
211 | } | |
212 | } | |
213 | return arg1; | |
214 | ||
215 | case BINOP_SUBSCRIPT: | |
216 | (*pos)++; | |
217 | arg1 = evaluate_subexp_with_coercion (exp, pos, noside); | |
218 | arg2 = evaluate_subexp_with_coercion (exp, pos, noside); | |
219 | if (noside == EVAL_SKIP) | |
220 | goto nosideret; | |
221 | /* If the user attempts to subscript something that is not an | |
222 | array or pointer type (like a plain int variable for example), | |
223 | then report this as an error. */ | |
224 | ||
225 | arg1 = coerce_ref (arg1); | |
226 | type = check_typedef (value_type (arg1)); | |
227 | ||
228 | if (m2_is_unbounded_array (type)) | |
229 | { | |
230 | struct value *temp = arg1; | |
231 | type = TYPE_FIELD_TYPE (type, 0); | |
b8d56208 MS |
232 | if (type == NULL || (TYPE_CODE (type) != TYPE_CODE_PTR)) |
233 | { | |
025bb325 MS |
234 | warning (_("internal error: unbounded " |
235 | "array structure is unknown")); | |
b8d56208 MS |
236 | return evaluate_subexp_standard (expect_type, exp, pos, noside); |
237 | } | |
844781a1 GM |
238 | /* i18n: Do not translate the "_m2_contents" part! */ |
239 | arg1 = value_struct_elt (&temp, NULL, "_m2_contents", NULL, | |
240 | _("unbounded structure " | |
241 | "missing _m2_contents field")); | |
242 | ||
243 | if (value_type (arg1) != type) | |
244 | arg1 = value_cast (type, arg1); | |
245 | ||
976aa66e | 246 | check_typedef (value_type (arg1)); |
2497b498 | 247 | return value_ind (value_ptradd (arg1, value_as_long (arg2))); |
844781a1 GM |
248 | } |
249 | else | |
250 | if (TYPE_CODE (type) != TYPE_CODE_ARRAY) | |
251 | { | |
252 | if (TYPE_NAME (type)) | |
253 | error (_("cannot subscript something of type `%s'"), | |
254 | TYPE_NAME (type)); | |
255 | else | |
256 | error (_("cannot subscript requested type")); | |
257 | } | |
258 | ||
259 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
260 | return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1)); | |
261 | else | |
2497b498 | 262 | return value_subscript (arg1, value_as_long (arg2)); |
844781a1 GM |
263 | |
264 | default: | |
265 | return evaluate_subexp_standard (expect_type, exp, pos, noside); | |
266 | } | |
267 | ||
268 | nosideret: | |
22601c15 | 269 | return value_from_longest (builtin_type (exp->gdbarch)->builtin_int, 1); |
844781a1 | 270 | } |
c906108c | 271 | \f |
c5aa993b | 272 | |
c906108c SS |
273 | /* Table of operators and their precedences for printing expressions. */ |
274 | ||
c5aa993b JM |
275 | static const struct op_print m2_op_print_tab[] = |
276 | { | |
277 | {"+", BINOP_ADD, PREC_ADD, 0}, | |
278 | {"+", UNOP_PLUS, PREC_PREFIX, 0}, | |
279 | {"-", BINOP_SUB, PREC_ADD, 0}, | |
280 | {"-", UNOP_NEG, PREC_PREFIX, 0}, | |
281 | {"*", BINOP_MUL, PREC_MUL, 0}, | |
282 | {"/", BINOP_DIV, PREC_MUL, 0}, | |
283 | {"DIV", BINOP_INTDIV, PREC_MUL, 0}, | |
284 | {"MOD", BINOP_REM, PREC_MUL, 0}, | |
285 | {":=", BINOP_ASSIGN, PREC_ASSIGN, 1}, | |
286 | {"OR", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0}, | |
287 | {"AND", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0}, | |
288 | {"NOT", UNOP_LOGICAL_NOT, PREC_PREFIX, 0}, | |
289 | {"=", BINOP_EQUAL, PREC_EQUAL, 0}, | |
290 | {"<>", BINOP_NOTEQUAL, PREC_EQUAL, 0}, | |
291 | {"<=", BINOP_LEQ, PREC_ORDER, 0}, | |
292 | {">=", BINOP_GEQ, PREC_ORDER, 0}, | |
293 | {">", BINOP_GTR, PREC_ORDER, 0}, | |
294 | {"<", BINOP_LESS, PREC_ORDER, 0}, | |
295 | {"^", UNOP_IND, PREC_PREFIX, 0}, | |
296 | {"@", BINOP_REPEAT, PREC_REPEAT, 0}, | |
297 | {"CAP", UNOP_CAP, PREC_BUILTIN_FUNCTION, 0}, | |
298 | {"CHR", UNOP_CHR, PREC_BUILTIN_FUNCTION, 0}, | |
299 | {"ORD", UNOP_ORD, PREC_BUILTIN_FUNCTION, 0}, | |
300 | {"FLOAT", UNOP_FLOAT, PREC_BUILTIN_FUNCTION, 0}, | |
301 | {"HIGH", UNOP_HIGH, PREC_BUILTIN_FUNCTION, 0}, | |
302 | {"MAX", UNOP_MAX, PREC_BUILTIN_FUNCTION, 0}, | |
303 | {"MIN", UNOP_MIN, PREC_BUILTIN_FUNCTION, 0}, | |
304 | {"ODD", UNOP_ODD, PREC_BUILTIN_FUNCTION, 0}, | |
305 | {"TRUNC", UNOP_TRUNC, PREC_BUILTIN_FUNCTION, 0}, | |
f486487f | 306 | {NULL, OP_NULL, PREC_BUILTIN_FUNCTION, 0} |
c906108c SS |
307 | }; |
308 | \f | |
309 | /* The built-in types of Modula-2. */ | |
310 | ||
cad351d1 UW |
311 | enum m2_primitive_types { |
312 | m2_primitive_type_char, | |
313 | m2_primitive_type_int, | |
314 | m2_primitive_type_card, | |
315 | m2_primitive_type_real, | |
316 | m2_primitive_type_bool, | |
317 | nr_m2_primitive_types | |
c906108c SS |
318 | }; |
319 | ||
cad351d1 UW |
320 | static void |
321 | m2_language_arch_info (struct gdbarch *gdbarch, | |
322 | struct language_arch_info *lai) | |
323 | { | |
5760b90a UW |
324 | const struct builtin_m2_type *builtin = builtin_m2_type (gdbarch); |
325 | ||
326 | lai->string_char_type = builtin->builtin_char; | |
cad351d1 UW |
327 | lai->primitive_type_vector |
328 | = GDBARCH_OBSTACK_CALLOC (gdbarch, nr_m2_primitive_types + 1, | |
329 | struct type *); | |
330 | ||
331 | lai->primitive_type_vector [m2_primitive_type_char] | |
5760b90a | 332 | = builtin->builtin_char; |
cad351d1 | 333 | lai->primitive_type_vector [m2_primitive_type_int] |
5760b90a | 334 | = builtin->builtin_int; |
cad351d1 | 335 | lai->primitive_type_vector [m2_primitive_type_card] |
5760b90a | 336 | = builtin->builtin_card; |
cad351d1 | 337 | lai->primitive_type_vector [m2_primitive_type_real] |
5760b90a | 338 | = builtin->builtin_real; |
cad351d1 | 339 | lai->primitive_type_vector [m2_primitive_type_bool] |
5760b90a | 340 | = builtin->builtin_bool; |
fbb06eb1 UW |
341 | |
342 | lai->bool_type_symbol = "BOOLEAN"; | |
343 | lai->bool_type_default = builtin->builtin_bool; | |
cad351d1 UW |
344 | } |
345 | ||
844781a1 GM |
346 | const struct exp_descriptor exp_descriptor_modula2 = |
347 | { | |
348 | print_subexp_standard, | |
349 | operator_length_standard, | |
c0201579 | 350 | operator_check_standard, |
844781a1 GM |
351 | op_name_standard, |
352 | dump_subexp_body_standard, | |
353 | evaluate_subexp_modula2 | |
354 | }; | |
355 | ||
47e77640 | 356 | extern const struct language_defn m2_language_defn = |
c5aa993b | 357 | { |
c906108c | 358 | "modula-2", |
6abde28f | 359 | "Modula-2", |
c906108c | 360 | language_m2, |
c906108c | 361 | range_check_on, |
63872f9d | 362 | case_sensitive_on, |
7ca2d3a3 | 363 | array_row_major, |
9a044a89 | 364 | macro_expansion_no, |
56618e20 | 365 | NULL, |
844781a1 | 366 | &exp_descriptor_modula2, |
c906108c | 367 | m2_parse, /* parser */ |
e85c3284 | 368 | null_post_parser, |
c906108c SS |
369 | m2_printchar, /* Print character constant */ |
370 | m2_printstr, /* function to print string constant */ | |
371 | m2_emit_char, /* Function to print a single character */ | |
c906108c | 372 | m2_print_type, /* Print a type using appropriate syntax */ |
5c6ce71d | 373 | m2_print_typedef, /* Print a typedef using appropriate syntax */ |
c906108c SS |
374 | m2_val_print, /* Print a value using appropriate syntax */ |
375 | c_value_print, /* Print a top-level value */ | |
a5ee536b | 376 | default_read_var_value, /* la_read_var_value */ |
f636b87d | 377 | NULL, /* Language specific skip_trampoline */ |
2b2d9e11 | 378 | NULL, /* name_of_this */ |
59cc4834 | 379 | false, /* la_store_sym_names_in_linkage_form_p */ |
5f9a71c3 | 380 | basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */ |
b368761e | 381 | basic_lookup_transparent_type,/* lookup_transparent_type */ |
9a3d7dfd | 382 | NULL, /* Language specific symbol demangler */ |
8b302db8 | 383 | NULL, |
025bb325 MS |
384 | NULL, /* Language specific |
385 | class_name_from_physname */ | |
c906108c SS |
386 | m2_op_print_tab, /* expression operators for printing */ |
387 | 0, /* arrays are first-class (not c-style) */ | |
388 | 0, /* String lower bound */ | |
6084f43a | 389 | default_word_break_characters, |
eb3ff9a5 | 390 | default_collect_symbol_completion_matches, |
cad351d1 | 391 | m2_language_arch_info, |
e79af960 | 392 | default_print_array_index, |
41f1b697 | 393 | default_pass_by_reference, |
ae6a3a4c | 394 | default_get_string, |
43cc5389 | 395 | c_watch_location_expression, |
b5ec771e | 396 | NULL, /* la_get_symbol_name_matcher */ |
f8eba3c6 | 397 | iterate_over_symbols, |
5ffa0793 | 398 | default_search_name_hash, |
a53b64ea | 399 | &default_varobj_ops, |
bb2ec1b3 TT |
400 | NULL, |
401 | NULL, | |
c906108c SS |
402 | LANG_MAGIC |
403 | }; | |
404 | ||
5760b90a UW |
405 | static void * |
406 | build_m2_types (struct gdbarch *gdbarch) | |
c906108c | 407 | { |
5760b90a UW |
408 | struct builtin_m2_type *builtin_m2_type |
409 | = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct builtin_m2_type); | |
410 | ||
c906108c | 411 | /* Modula-2 "pervasive" types. NOTE: these can be redefined!!! */ |
e9bb382b UW |
412 | builtin_m2_type->builtin_int |
413 | = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), 0, "INTEGER"); | |
414 | builtin_m2_type->builtin_card | |
415 | = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), 1, "CARDINAL"); | |
416 | builtin_m2_type->builtin_real | |
49f190bc UW |
417 | = arch_float_type (gdbarch, gdbarch_float_bit (gdbarch), "REAL", |
418 | gdbarch_float_format (gdbarch)); | |
e9bb382b UW |
419 | builtin_m2_type->builtin_char |
420 | = arch_character_type (gdbarch, TARGET_CHAR_BIT, 1, "CHAR"); | |
421 | builtin_m2_type->builtin_bool | |
422 | = arch_boolean_type (gdbarch, gdbarch_int_bit (gdbarch), 1, "BOOLEAN"); | |
c906108c | 423 | |
5760b90a UW |
424 | return builtin_m2_type; |
425 | } | |
426 | ||
427 | static struct gdbarch_data *m2_type_data; | |
428 | ||
429 | const struct builtin_m2_type * | |
430 | builtin_m2_type (struct gdbarch *gdbarch) | |
431 | { | |
9a3c8263 | 432 | return (const struct builtin_m2_type *) gdbarch_data (gdbarch, m2_type_data); |
5760b90a UW |
433 | } |
434 | ||
435 | ||
436 | /* Initialization for Modula-2 */ | |
437 | ||
438 | void | |
439 | _initialize_m2_language (void) | |
440 | { | |
441 | m2_type_data = gdbarch_data_register_post_init (build_m2_types); | |
c906108c | 442 | } |