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6e681866 | 1 | /* Ada language support routines for GDB, the GNU debugger. |
10a2c479 | 2 | |
b811d2c2 | 3 | Copyright (C) 1992-2020 Free Software Foundation, Inc. |
14f9c5c9 | 4 | |
a9762ec7 | 5 | This file is part of GDB. |
14f9c5c9 | 6 | |
a9762ec7 JB |
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 | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
14f9c5c9 | 11 | |
a9762ec7 JB |
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. | |
14f9c5c9 | 16 | |
a9762ec7 JB |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
14f9c5c9 | 19 | |
96d887e8 | 20 | |
4c4b4cd2 | 21 | #include "defs.h" |
14f9c5c9 | 22 | #include <ctype.h> |
d55e5aa6 | 23 | #include "gdb_regex.h" |
4de283e4 TT |
24 | #include "frame.h" |
25 | #include "symtab.h" | |
26 | #include "gdbtypes.h" | |
14f9c5c9 | 27 | #include "gdbcmd.h" |
4de283e4 TT |
28 | #include "expression.h" |
29 | #include "parser-defs.h" | |
30 | #include "language.h" | |
31 | #include "varobj.h" | |
4de283e4 TT |
32 | #include "inferior.h" |
33 | #include "symfile.h" | |
34 | #include "objfiles.h" | |
35 | #include "breakpoint.h" | |
14f9c5c9 | 36 | #include "gdbcore.h" |
4c4b4cd2 | 37 | #include "hashtab.h" |
4de283e4 TT |
38 | #include "gdb_obstack.h" |
39 | #include "ada-lang.h" | |
40 | #include "completer.h" | |
4de283e4 TT |
41 | #include "ui-out.h" |
42 | #include "block.h" | |
04714b91 | 43 | #include "infcall.h" |
4de283e4 TT |
44 | #include "annotate.h" |
45 | #include "valprint.h" | |
d55e5aa6 | 46 | #include "source.h" |
4de283e4 | 47 | #include "observable.h" |
692465f1 | 48 | #include "stack.h" |
79d43c61 | 49 | #include "typeprint.h" |
4de283e4 | 50 | #include "namespace.h" |
7f6aba03 | 51 | #include "cli/cli-style.h" |
4de283e4 | 52 | |
40bc484c | 53 | #include "value.h" |
4de283e4 TT |
54 | #include "mi/mi-common.h" |
55 | #include "arch-utils.h" | |
56 | #include "cli/cli-utils.h" | |
268a13a5 TT |
57 | #include "gdbsupport/function-view.h" |
58 | #include "gdbsupport/byte-vector.h" | |
4de283e4 | 59 | #include <algorithm> |
ccefe4c4 | 60 | |
4c4b4cd2 | 61 | /* Define whether or not the C operator '/' truncates towards zero for |
0963b4bd | 62 | differently signed operands (truncation direction is undefined in C). |
4c4b4cd2 PH |
63 | Copied from valarith.c. */ |
64 | ||
65 | #ifndef TRUNCATION_TOWARDS_ZERO | |
66 | #define TRUNCATION_TOWARDS_ZERO ((-5 / 2) == -2) | |
67 | #endif | |
68 | ||
d2e4a39e | 69 | static struct type *desc_base_type (struct type *); |
14f9c5c9 | 70 | |
d2e4a39e | 71 | static struct type *desc_bounds_type (struct type *); |
14f9c5c9 | 72 | |
d2e4a39e | 73 | static struct value *desc_bounds (struct value *); |
14f9c5c9 | 74 | |
d2e4a39e | 75 | static int fat_pntr_bounds_bitpos (struct type *); |
14f9c5c9 | 76 | |
d2e4a39e | 77 | static int fat_pntr_bounds_bitsize (struct type *); |
14f9c5c9 | 78 | |
556bdfd4 | 79 | static struct type *desc_data_target_type (struct type *); |
14f9c5c9 | 80 | |
d2e4a39e | 81 | static struct value *desc_data (struct value *); |
14f9c5c9 | 82 | |
d2e4a39e | 83 | static int fat_pntr_data_bitpos (struct type *); |
14f9c5c9 | 84 | |
d2e4a39e | 85 | static int fat_pntr_data_bitsize (struct type *); |
14f9c5c9 | 86 | |
d2e4a39e | 87 | static struct value *desc_one_bound (struct value *, int, int); |
14f9c5c9 | 88 | |
d2e4a39e | 89 | static int desc_bound_bitpos (struct type *, int, int); |
14f9c5c9 | 90 | |
d2e4a39e | 91 | static int desc_bound_bitsize (struct type *, int, int); |
14f9c5c9 | 92 | |
d2e4a39e | 93 | static struct type *desc_index_type (struct type *, int); |
14f9c5c9 | 94 | |
d2e4a39e | 95 | static int desc_arity (struct type *); |
14f9c5c9 | 96 | |
d2e4a39e | 97 | static int ada_type_match (struct type *, struct type *, int); |
14f9c5c9 | 98 | |
d2e4a39e | 99 | static int ada_args_match (struct symbol *, struct value **, int); |
14f9c5c9 | 100 | |
40bc484c | 101 | static struct value *make_array_descriptor (struct type *, struct value *); |
14f9c5c9 | 102 | |
4c4b4cd2 | 103 | static void ada_add_block_symbols (struct obstack *, |
b5ec771e PA |
104 | const struct block *, |
105 | const lookup_name_info &lookup_name, | |
106 | domain_enum, struct objfile *); | |
14f9c5c9 | 107 | |
22cee43f | 108 | static void ada_add_all_symbols (struct obstack *, const struct block *, |
b5ec771e PA |
109 | const lookup_name_info &lookup_name, |
110 | domain_enum, int, int *); | |
22cee43f | 111 | |
d12307c1 | 112 | static int is_nonfunction (struct block_symbol *, int); |
14f9c5c9 | 113 | |
76a01679 | 114 | static void add_defn_to_vec (struct obstack *, struct symbol *, |
dda83cd7 | 115 | const struct block *); |
14f9c5c9 | 116 | |
4c4b4cd2 PH |
117 | static int num_defns_collected (struct obstack *); |
118 | ||
d12307c1 | 119 | static struct block_symbol *defns_collected (struct obstack *, int); |
14f9c5c9 | 120 | |
e9d9f57e | 121 | static struct value *resolve_subexp (expression_up *, int *, int, |
dda83cd7 | 122 | struct type *, int, |
699bd4cf | 123 | innermost_block_tracker *); |
14f9c5c9 | 124 | |
e9d9f57e | 125 | static void replace_operator_with_call (expression_up *, int, int, int, |
dda83cd7 | 126 | struct symbol *, const struct block *); |
14f9c5c9 | 127 | |
d2e4a39e | 128 | static int possible_user_operator_p (enum exp_opcode, struct value **); |
14f9c5c9 | 129 | |
4c4b4cd2 | 130 | static const char *ada_decoded_op_name (enum exp_opcode); |
14f9c5c9 | 131 | |
d2e4a39e | 132 | static int numeric_type_p (struct type *); |
14f9c5c9 | 133 | |
d2e4a39e | 134 | static int integer_type_p (struct type *); |
14f9c5c9 | 135 | |
d2e4a39e | 136 | static int scalar_type_p (struct type *); |
14f9c5c9 | 137 | |
d2e4a39e | 138 | static int discrete_type_p (struct type *); |
14f9c5c9 | 139 | |
a121b7c1 | 140 | static struct type *ada_lookup_struct_elt_type (struct type *, const char *, |
dda83cd7 | 141 | int, int); |
4c4b4cd2 | 142 | |
d2e4a39e | 143 | static struct value *evaluate_subexp_type (struct expression *, int *); |
14f9c5c9 | 144 | |
b4ba55a1 | 145 | static struct type *ada_find_parallel_type_with_name (struct type *, |
dda83cd7 | 146 | const char *); |
b4ba55a1 | 147 | |
d2e4a39e | 148 | static int is_dynamic_field (struct type *, int); |
14f9c5c9 | 149 | |
10a2c479 | 150 | static struct type *to_fixed_variant_branch_type (struct type *, |
fc1a4b47 | 151 | const gdb_byte *, |
dda83cd7 | 152 | CORE_ADDR, struct value *); |
4c4b4cd2 PH |
153 | |
154 | static struct type *to_fixed_array_type (struct type *, struct value *, int); | |
14f9c5c9 | 155 | |
28c85d6c | 156 | static struct type *to_fixed_range_type (struct type *, struct value *); |
14f9c5c9 | 157 | |
d2e4a39e | 158 | static struct type *to_static_fixed_type (struct type *); |
f192137b | 159 | static struct type *static_unwrap_type (struct type *type); |
14f9c5c9 | 160 | |
d2e4a39e | 161 | static struct value *unwrap_value (struct value *); |
14f9c5c9 | 162 | |
ad82864c | 163 | static struct type *constrained_packed_array_type (struct type *, long *); |
14f9c5c9 | 164 | |
ad82864c | 165 | static struct type *decode_constrained_packed_array_type (struct type *); |
14f9c5c9 | 166 | |
ad82864c JB |
167 | static long decode_packed_array_bitsize (struct type *); |
168 | ||
169 | static struct value *decode_constrained_packed_array (struct value *); | |
170 | ||
ad82864c | 171 | static int ada_is_unconstrained_packed_array_type (struct type *); |
14f9c5c9 | 172 | |
d2e4a39e | 173 | static struct value *value_subscript_packed (struct value *, int, |
dda83cd7 | 174 | struct value **); |
14f9c5c9 | 175 | |
4c4b4cd2 | 176 | static struct value *coerce_unspec_val_to_type (struct value *, |
dda83cd7 | 177 | struct type *); |
14f9c5c9 | 178 | |
d2e4a39e | 179 | static int lesseq_defined_than (struct symbol *, struct symbol *); |
14f9c5c9 | 180 | |
d2e4a39e | 181 | static int equiv_types (struct type *, struct type *); |
14f9c5c9 | 182 | |
d2e4a39e | 183 | static int is_name_suffix (const char *); |
14f9c5c9 | 184 | |
59c8a30b | 185 | static int advance_wild_match (const char **, const char *, char); |
73589123 | 186 | |
b5ec771e | 187 | static bool wild_match (const char *name, const char *patn); |
14f9c5c9 | 188 | |
d2e4a39e | 189 | static struct value *ada_coerce_ref (struct value *); |
14f9c5c9 | 190 | |
4c4b4cd2 PH |
191 | static LONGEST pos_atr (struct value *); |
192 | ||
3cb382c9 | 193 | static struct value *value_pos_atr (struct type *, struct value *); |
14f9c5c9 | 194 | |
53a47a3e TT |
195 | static struct value *val_atr (struct type *, LONGEST); |
196 | ||
d2e4a39e | 197 | static struct value *value_val_atr (struct type *, struct value *); |
14f9c5c9 | 198 | |
4c4b4cd2 | 199 | static struct symbol *standard_lookup (const char *, const struct block *, |
dda83cd7 | 200 | domain_enum); |
14f9c5c9 | 201 | |
108d56a4 | 202 | static struct value *ada_search_struct_field (const char *, struct value *, int, |
dda83cd7 | 203 | struct type *); |
4c4b4cd2 | 204 | |
0d5cff50 | 205 | static int find_struct_field (const char *, struct type *, int, |
dda83cd7 | 206 | struct type **, int *, int *, int *, int *); |
4c4b4cd2 | 207 | |
d12307c1 | 208 | static int ada_resolve_function (struct block_symbol *, int, |
dda83cd7 SM |
209 | struct value **, int, const char *, |
210 | struct type *, int); | |
4c4b4cd2 | 211 | |
4c4b4cd2 PH |
212 | static int ada_is_direct_array_type (struct type *); |
213 | ||
52ce6436 PH |
214 | static struct value *ada_index_struct_field (int, struct value *, int, |
215 | struct type *); | |
216 | ||
217 | static struct value *assign_aggregate (struct value *, struct value *, | |
0963b4bd MS |
218 | struct expression *, |
219 | int *, enum noside); | |
52ce6436 PH |
220 | |
221 | static void aggregate_assign_from_choices (struct value *, struct value *, | |
222 | struct expression *, | |
223 | int *, LONGEST *, int *, | |
224 | int, LONGEST, LONGEST); | |
225 | ||
226 | static void aggregate_assign_positional (struct value *, struct value *, | |
227 | struct expression *, | |
228 | int *, LONGEST *, int *, int, | |
229 | LONGEST, LONGEST); | |
230 | ||
231 | ||
232 | static void aggregate_assign_others (struct value *, struct value *, | |
233 | struct expression *, | |
234 | int *, LONGEST *, int, LONGEST, LONGEST); | |
235 | ||
236 | ||
237 | static void add_component_interval (LONGEST, LONGEST, LONGEST *, int *, int); | |
238 | ||
239 | ||
240 | static struct value *ada_evaluate_subexp (struct type *, struct expression *, | |
241 | int *, enum noside); | |
242 | ||
243 | static void ada_forward_operator_length (struct expression *, int, int *, | |
244 | int *); | |
852dff6c JB |
245 | |
246 | static struct type *ada_find_any_type (const char *name); | |
b5ec771e PA |
247 | |
248 | static symbol_name_matcher_ftype *ada_get_symbol_name_matcher | |
249 | (const lookup_name_info &lookup_name); | |
250 | ||
4c4b4cd2 PH |
251 | \f |
252 | ||
ee01b665 JB |
253 | /* The result of a symbol lookup to be stored in our symbol cache. */ |
254 | ||
255 | struct cache_entry | |
256 | { | |
257 | /* The name used to perform the lookup. */ | |
258 | const char *name; | |
259 | /* The namespace used during the lookup. */ | |
fe978cb0 | 260 | domain_enum domain; |
ee01b665 JB |
261 | /* The symbol returned by the lookup, or NULL if no matching symbol |
262 | was found. */ | |
263 | struct symbol *sym; | |
264 | /* The block where the symbol was found, or NULL if no matching | |
265 | symbol was found. */ | |
266 | const struct block *block; | |
267 | /* A pointer to the next entry with the same hash. */ | |
268 | struct cache_entry *next; | |
269 | }; | |
270 | ||
271 | /* The Ada symbol cache, used to store the result of Ada-mode symbol | |
272 | lookups in the course of executing the user's commands. | |
273 | ||
274 | The cache is implemented using a simple, fixed-sized hash. | |
275 | The size is fixed on the grounds that there are not likely to be | |
276 | all that many symbols looked up during any given session, regardless | |
277 | of the size of the symbol table. If we decide to go to a resizable | |
278 | table, let's just use the stuff from libiberty instead. */ | |
279 | ||
280 | #define HASH_SIZE 1009 | |
281 | ||
282 | struct ada_symbol_cache | |
283 | { | |
284 | /* An obstack used to store the entries in our cache. */ | |
285 | struct obstack cache_space; | |
286 | ||
287 | /* The root of the hash table used to implement our symbol cache. */ | |
288 | struct cache_entry *root[HASH_SIZE]; | |
289 | }; | |
290 | ||
291 | static void ada_free_symbol_cache (struct ada_symbol_cache *sym_cache); | |
76a01679 | 292 | |
4c4b4cd2 | 293 | /* Maximum-sized dynamic type. */ |
14f9c5c9 AS |
294 | static unsigned int varsize_limit; |
295 | ||
67cb5b2d | 296 | static const char ada_completer_word_break_characters[] = |
4c4b4cd2 PH |
297 | #ifdef VMS |
298 | " \t\n!@#%^&*()+=|~`}{[]\";:?/,-"; | |
299 | #else | |
14f9c5c9 | 300 | " \t\n!@#$%^&*()+=|~`}{[]\";:?/,-"; |
4c4b4cd2 | 301 | #endif |
14f9c5c9 | 302 | |
4c4b4cd2 | 303 | /* The name of the symbol to use to get the name of the main subprogram. */ |
76a01679 | 304 | static const char ADA_MAIN_PROGRAM_SYMBOL_NAME[] |
4c4b4cd2 | 305 | = "__gnat_ada_main_program_name"; |
14f9c5c9 | 306 | |
4c4b4cd2 PH |
307 | /* Limit on the number of warnings to raise per expression evaluation. */ |
308 | static int warning_limit = 2; | |
309 | ||
310 | /* Number of warning messages issued; reset to 0 by cleanups after | |
311 | expression evaluation. */ | |
312 | static int warnings_issued = 0; | |
313 | ||
27087b7f | 314 | static const char * const known_runtime_file_name_patterns[] = { |
4c4b4cd2 PH |
315 | ADA_KNOWN_RUNTIME_FILE_NAME_PATTERNS NULL |
316 | }; | |
317 | ||
27087b7f | 318 | static const char * const known_auxiliary_function_name_patterns[] = { |
4c4b4cd2 PH |
319 | ADA_KNOWN_AUXILIARY_FUNCTION_NAME_PATTERNS NULL |
320 | }; | |
321 | ||
c6044dd1 JB |
322 | /* Maintenance-related settings for this module. */ |
323 | ||
324 | static struct cmd_list_element *maint_set_ada_cmdlist; | |
325 | static struct cmd_list_element *maint_show_ada_cmdlist; | |
326 | ||
c6044dd1 JB |
327 | /* The "maintenance ada set/show ignore-descriptive-type" value. */ |
328 | ||
491144b5 | 329 | static bool ada_ignore_descriptive_types_p = false; |
c6044dd1 | 330 | |
e802dbe0 JB |
331 | /* Inferior-specific data. */ |
332 | ||
333 | /* Per-inferior data for this module. */ | |
334 | ||
335 | struct ada_inferior_data | |
336 | { | |
337 | /* The ada__tags__type_specific_data type, which is used when decoding | |
338 | tagged types. With older versions of GNAT, this type was directly | |
339 | accessible through a component ("tsd") in the object tag. But this | |
340 | is no longer the case, so we cache it for each inferior. */ | |
f37b313d | 341 | struct type *tsd_type = nullptr; |
3eecfa55 JB |
342 | |
343 | /* The exception_support_info data. This data is used to determine | |
344 | how to implement support for Ada exception catchpoints in a given | |
345 | inferior. */ | |
f37b313d | 346 | const struct exception_support_info *exception_info = nullptr; |
e802dbe0 JB |
347 | }; |
348 | ||
349 | /* Our key to this module's inferior data. */ | |
f37b313d | 350 | static const struct inferior_key<ada_inferior_data> ada_inferior_data; |
e802dbe0 JB |
351 | |
352 | /* Return our inferior data for the given inferior (INF). | |
353 | ||
354 | This function always returns a valid pointer to an allocated | |
355 | ada_inferior_data structure. If INF's inferior data has not | |
356 | been previously set, this functions creates a new one with all | |
357 | fields set to zero, sets INF's inferior to it, and then returns | |
358 | a pointer to that newly allocated ada_inferior_data. */ | |
359 | ||
360 | static struct ada_inferior_data * | |
361 | get_ada_inferior_data (struct inferior *inf) | |
362 | { | |
363 | struct ada_inferior_data *data; | |
364 | ||
f37b313d | 365 | data = ada_inferior_data.get (inf); |
e802dbe0 | 366 | if (data == NULL) |
f37b313d | 367 | data = ada_inferior_data.emplace (inf); |
e802dbe0 JB |
368 | |
369 | return data; | |
370 | } | |
371 | ||
372 | /* Perform all necessary cleanups regarding our module's inferior data | |
373 | that is required after the inferior INF just exited. */ | |
374 | ||
375 | static void | |
376 | ada_inferior_exit (struct inferior *inf) | |
377 | { | |
f37b313d | 378 | ada_inferior_data.clear (inf); |
e802dbe0 JB |
379 | } |
380 | ||
ee01b665 JB |
381 | |
382 | /* program-space-specific data. */ | |
383 | ||
384 | /* This module's per-program-space data. */ | |
385 | struct ada_pspace_data | |
386 | { | |
f37b313d TT |
387 | ~ada_pspace_data () |
388 | { | |
389 | if (sym_cache != NULL) | |
390 | ada_free_symbol_cache (sym_cache); | |
391 | } | |
392 | ||
ee01b665 | 393 | /* The Ada symbol cache. */ |
f37b313d | 394 | struct ada_symbol_cache *sym_cache = nullptr; |
ee01b665 JB |
395 | }; |
396 | ||
397 | /* Key to our per-program-space data. */ | |
f37b313d | 398 | static const struct program_space_key<ada_pspace_data> ada_pspace_data_handle; |
ee01b665 JB |
399 | |
400 | /* Return this module's data for the given program space (PSPACE). | |
401 | If not is found, add a zero'ed one now. | |
402 | ||
403 | This function always returns a valid object. */ | |
404 | ||
405 | static struct ada_pspace_data * | |
406 | get_ada_pspace_data (struct program_space *pspace) | |
407 | { | |
408 | struct ada_pspace_data *data; | |
409 | ||
f37b313d | 410 | data = ada_pspace_data_handle.get (pspace); |
ee01b665 | 411 | if (data == NULL) |
f37b313d | 412 | data = ada_pspace_data_handle.emplace (pspace); |
ee01b665 JB |
413 | |
414 | return data; | |
415 | } | |
416 | ||
dda83cd7 | 417 | /* Utilities */ |
4c4b4cd2 | 418 | |
720d1a40 | 419 | /* If TYPE is a TYPE_CODE_TYPEDEF type, return the target type after |
eed9788b | 420 | all typedef layers have been peeled. Otherwise, return TYPE. |
720d1a40 JB |
421 | |
422 | Normally, we really expect a typedef type to only have 1 typedef layer. | |
423 | In other words, we really expect the target type of a typedef type to be | |
424 | a non-typedef type. This is particularly true for Ada units, because | |
425 | the language does not have a typedef vs not-typedef distinction. | |
426 | In that respect, the Ada compiler has been trying to eliminate as many | |
427 | typedef definitions in the debugging information, since they generally | |
428 | do not bring any extra information (we still use typedef under certain | |
429 | circumstances related mostly to the GNAT encoding). | |
430 | ||
431 | Unfortunately, we have seen situations where the debugging information | |
432 | generated by the compiler leads to such multiple typedef layers. For | |
433 | instance, consider the following example with stabs: | |
434 | ||
435 | .stabs "pck__float_array___XUP:Tt(0,46)=s16P_ARRAY:(0,47)=[...]"[...] | |
436 | .stabs "pck__float_array___XUP:t(0,36)=(0,46)",128,0,6,0 | |
437 | ||
438 | This is an error in the debugging information which causes type | |
439 | pck__float_array___XUP to be defined twice, and the second time, | |
440 | it is defined as a typedef of a typedef. | |
441 | ||
442 | This is on the fringe of legality as far as debugging information is | |
443 | concerned, and certainly unexpected. But it is easy to handle these | |
444 | situations correctly, so we can afford to be lenient in this case. */ | |
445 | ||
446 | static struct type * | |
447 | ada_typedef_target_type (struct type *type) | |
448 | { | |
78134374 | 449 | while (type->code () == TYPE_CODE_TYPEDEF) |
720d1a40 JB |
450 | type = TYPE_TARGET_TYPE (type); |
451 | return type; | |
452 | } | |
453 | ||
41d27058 JB |
454 | /* Given DECODED_NAME a string holding a symbol name in its |
455 | decoded form (ie using the Ada dotted notation), returns | |
456 | its unqualified name. */ | |
457 | ||
458 | static const char * | |
459 | ada_unqualified_name (const char *decoded_name) | |
460 | { | |
2b0f535a JB |
461 | const char *result; |
462 | ||
463 | /* If the decoded name starts with '<', it means that the encoded | |
464 | name does not follow standard naming conventions, and thus that | |
465 | it is not your typical Ada symbol name. Trying to unqualify it | |
466 | is therefore pointless and possibly erroneous. */ | |
467 | if (decoded_name[0] == '<') | |
468 | return decoded_name; | |
469 | ||
470 | result = strrchr (decoded_name, '.'); | |
41d27058 JB |
471 | if (result != NULL) |
472 | result++; /* Skip the dot... */ | |
473 | else | |
474 | result = decoded_name; | |
475 | ||
476 | return result; | |
477 | } | |
478 | ||
39e7af3e | 479 | /* Return a string starting with '<', followed by STR, and '>'. */ |
41d27058 | 480 | |
39e7af3e | 481 | static std::string |
41d27058 JB |
482 | add_angle_brackets (const char *str) |
483 | { | |
39e7af3e | 484 | return string_printf ("<%s>", str); |
41d27058 | 485 | } |
96d887e8 | 486 | |
de93309a SM |
487 | /* Assuming V points to an array of S objects, make sure that it contains at |
488 | least M objects, updating V and S as necessary. */ | |
489 | ||
490 | #define GROW_VECT(v, s, m) \ | |
491 | if ((s) < (m)) (v) = (char *) grow_vect (v, &(s), m, sizeof *(v)); | |
492 | ||
f27cf670 | 493 | /* Assuming VECT points to an array of *SIZE objects of size |
14f9c5c9 | 494 | ELEMENT_SIZE, grow it to contain at least MIN_SIZE objects, |
f27cf670 | 495 | updating *SIZE as necessary and returning the (new) array. */ |
14f9c5c9 | 496 | |
de93309a | 497 | static void * |
f27cf670 | 498 | grow_vect (void *vect, size_t *size, size_t min_size, int element_size) |
14f9c5c9 | 499 | { |
d2e4a39e AS |
500 | if (*size < min_size) |
501 | { | |
502 | *size *= 2; | |
503 | if (*size < min_size) | |
dda83cd7 | 504 | *size = min_size; |
f27cf670 | 505 | vect = xrealloc (vect, *size * element_size); |
d2e4a39e | 506 | } |
f27cf670 | 507 | return vect; |
14f9c5c9 AS |
508 | } |
509 | ||
510 | /* True (non-zero) iff TARGET matches FIELD_NAME up to any trailing | |
4c4b4cd2 | 511 | suffix of FIELD_NAME beginning "___". */ |
14f9c5c9 AS |
512 | |
513 | static int | |
ebf56fd3 | 514 | field_name_match (const char *field_name, const char *target) |
14f9c5c9 AS |
515 | { |
516 | int len = strlen (target); | |
5b4ee69b | 517 | |
d2e4a39e | 518 | return |
4c4b4cd2 PH |
519 | (strncmp (field_name, target, len) == 0 |
520 | && (field_name[len] == '\0' | |
dda83cd7 SM |
521 | || (startswith (field_name + len, "___") |
522 | && strcmp (field_name + strlen (field_name) - 6, | |
523 | "___XVN") != 0))); | |
14f9c5c9 AS |
524 | } |
525 | ||
526 | ||
872c8b51 JB |
527 | /* Assuming TYPE is a TYPE_CODE_STRUCT or a TYPE_CODE_TYPDEF to |
528 | a TYPE_CODE_STRUCT, find the field whose name matches FIELD_NAME, | |
529 | and return its index. This function also handles fields whose name | |
530 | have ___ suffixes because the compiler sometimes alters their name | |
531 | by adding such a suffix to represent fields with certain constraints. | |
532 | If the field could not be found, return a negative number if | |
533 | MAYBE_MISSING is set. Otherwise raise an error. */ | |
4c4b4cd2 PH |
534 | |
535 | int | |
536 | ada_get_field_index (const struct type *type, const char *field_name, | |
dda83cd7 | 537 | int maybe_missing) |
4c4b4cd2 PH |
538 | { |
539 | int fieldno; | |
872c8b51 JB |
540 | struct type *struct_type = check_typedef ((struct type *) type); |
541 | ||
1f704f76 | 542 | for (fieldno = 0; fieldno < struct_type->num_fields (); fieldno++) |
872c8b51 | 543 | if (field_name_match (TYPE_FIELD_NAME (struct_type, fieldno), field_name)) |
4c4b4cd2 PH |
544 | return fieldno; |
545 | ||
546 | if (!maybe_missing) | |
323e0a4a | 547 | error (_("Unable to find field %s in struct %s. Aborting"), |
dda83cd7 | 548 | field_name, struct_type->name ()); |
4c4b4cd2 PH |
549 | |
550 | return -1; | |
551 | } | |
552 | ||
553 | /* The length of the prefix of NAME prior to any "___" suffix. */ | |
14f9c5c9 AS |
554 | |
555 | int | |
d2e4a39e | 556 | ada_name_prefix_len (const char *name) |
14f9c5c9 AS |
557 | { |
558 | if (name == NULL) | |
559 | return 0; | |
d2e4a39e | 560 | else |
14f9c5c9 | 561 | { |
d2e4a39e | 562 | const char *p = strstr (name, "___"); |
5b4ee69b | 563 | |
14f9c5c9 | 564 | if (p == NULL) |
dda83cd7 | 565 | return strlen (name); |
14f9c5c9 | 566 | else |
dda83cd7 | 567 | return p - name; |
14f9c5c9 AS |
568 | } |
569 | } | |
570 | ||
4c4b4cd2 PH |
571 | /* Return non-zero if SUFFIX is a suffix of STR. |
572 | Return zero if STR is null. */ | |
573 | ||
14f9c5c9 | 574 | static int |
d2e4a39e | 575 | is_suffix (const char *str, const char *suffix) |
14f9c5c9 AS |
576 | { |
577 | int len1, len2; | |
5b4ee69b | 578 | |
14f9c5c9 AS |
579 | if (str == NULL) |
580 | return 0; | |
581 | len1 = strlen (str); | |
582 | len2 = strlen (suffix); | |
4c4b4cd2 | 583 | return (len1 >= len2 && strcmp (str + len1 - len2, suffix) == 0); |
14f9c5c9 AS |
584 | } |
585 | ||
4c4b4cd2 PH |
586 | /* The contents of value VAL, treated as a value of type TYPE. The |
587 | result is an lval in memory if VAL is. */ | |
14f9c5c9 | 588 | |
d2e4a39e | 589 | static struct value * |
4c4b4cd2 | 590 | coerce_unspec_val_to_type (struct value *val, struct type *type) |
14f9c5c9 | 591 | { |
61ee279c | 592 | type = ada_check_typedef (type); |
df407dfe | 593 | if (value_type (val) == type) |
4c4b4cd2 | 594 | return val; |
d2e4a39e | 595 | else |
14f9c5c9 | 596 | { |
4c4b4cd2 PH |
597 | struct value *result; |
598 | ||
599 | /* Make sure that the object size is not unreasonable before | |
dda83cd7 | 600 | trying to allocate some memory for it. */ |
c1b5a1a6 | 601 | ada_ensure_varsize_limit (type); |
4c4b4cd2 | 602 | |
41e8491f | 603 | if (value_lazy (val) |
dda83cd7 | 604 | || TYPE_LENGTH (type) > TYPE_LENGTH (value_type (val))) |
41e8491f JK |
605 | result = allocate_value_lazy (type); |
606 | else | |
607 | { | |
608 | result = allocate_value (type); | |
9a0dc9e3 | 609 | value_contents_copy_raw (result, 0, val, 0, TYPE_LENGTH (type)); |
41e8491f | 610 | } |
74bcbdf3 | 611 | set_value_component_location (result, val); |
9bbda503 AC |
612 | set_value_bitsize (result, value_bitsize (val)); |
613 | set_value_bitpos (result, value_bitpos (val)); | |
c408a94f TT |
614 | if (VALUE_LVAL (result) == lval_memory) |
615 | set_value_address (result, value_address (val)); | |
14f9c5c9 AS |
616 | return result; |
617 | } | |
618 | } | |
619 | ||
fc1a4b47 AC |
620 | static const gdb_byte * |
621 | cond_offset_host (const gdb_byte *valaddr, long offset) | |
14f9c5c9 AS |
622 | { |
623 | if (valaddr == NULL) | |
624 | return NULL; | |
625 | else | |
626 | return valaddr + offset; | |
627 | } | |
628 | ||
629 | static CORE_ADDR | |
ebf56fd3 | 630 | cond_offset_target (CORE_ADDR address, long offset) |
14f9c5c9 AS |
631 | { |
632 | if (address == 0) | |
633 | return 0; | |
d2e4a39e | 634 | else |
14f9c5c9 AS |
635 | return address + offset; |
636 | } | |
637 | ||
4c4b4cd2 PH |
638 | /* Issue a warning (as for the definition of warning in utils.c, but |
639 | with exactly one argument rather than ...), unless the limit on the | |
640 | number of warnings has passed during the evaluation of the current | |
641 | expression. */ | |
a2249542 | 642 | |
77109804 AC |
643 | /* FIXME: cagney/2004-10-10: This function is mimicking the behavior |
644 | provided by "complaint". */ | |
a0b31db1 | 645 | static void lim_warning (const char *format, ...) ATTRIBUTE_PRINTF (1, 2); |
77109804 | 646 | |
14f9c5c9 | 647 | static void |
a2249542 | 648 | lim_warning (const char *format, ...) |
14f9c5c9 | 649 | { |
a2249542 | 650 | va_list args; |
a2249542 | 651 | |
5b4ee69b | 652 | va_start (args, format); |
4c4b4cd2 PH |
653 | warnings_issued += 1; |
654 | if (warnings_issued <= warning_limit) | |
a2249542 MK |
655 | vwarning (format, args); |
656 | ||
657 | va_end (args); | |
4c4b4cd2 PH |
658 | } |
659 | ||
714e53ab PH |
660 | /* Issue an error if the size of an object of type T is unreasonable, |
661 | i.e. if it would be a bad idea to allocate a value of this type in | |
662 | GDB. */ | |
663 | ||
c1b5a1a6 JB |
664 | void |
665 | ada_ensure_varsize_limit (const struct type *type) | |
714e53ab PH |
666 | { |
667 | if (TYPE_LENGTH (type) > varsize_limit) | |
323e0a4a | 668 | error (_("object size is larger than varsize-limit")); |
714e53ab PH |
669 | } |
670 | ||
0963b4bd | 671 | /* Maximum value of a SIZE-byte signed integer type. */ |
4c4b4cd2 | 672 | static LONGEST |
c3e5cd34 | 673 | max_of_size (int size) |
4c4b4cd2 | 674 | { |
76a01679 | 675 | LONGEST top_bit = (LONGEST) 1 << (size * 8 - 2); |
5b4ee69b | 676 | |
76a01679 | 677 | return top_bit | (top_bit - 1); |
4c4b4cd2 PH |
678 | } |
679 | ||
0963b4bd | 680 | /* Minimum value of a SIZE-byte signed integer type. */ |
4c4b4cd2 | 681 | static LONGEST |
c3e5cd34 | 682 | min_of_size (int size) |
4c4b4cd2 | 683 | { |
c3e5cd34 | 684 | return -max_of_size (size) - 1; |
4c4b4cd2 PH |
685 | } |
686 | ||
0963b4bd | 687 | /* Maximum value of a SIZE-byte unsigned integer type. */ |
4c4b4cd2 | 688 | static ULONGEST |
c3e5cd34 | 689 | umax_of_size (int size) |
4c4b4cd2 | 690 | { |
76a01679 | 691 | ULONGEST top_bit = (ULONGEST) 1 << (size * 8 - 1); |
5b4ee69b | 692 | |
76a01679 | 693 | return top_bit | (top_bit - 1); |
4c4b4cd2 PH |
694 | } |
695 | ||
0963b4bd | 696 | /* Maximum value of integral type T, as a signed quantity. */ |
c3e5cd34 PH |
697 | static LONGEST |
698 | max_of_type (struct type *t) | |
4c4b4cd2 | 699 | { |
c6d940a9 | 700 | if (t->is_unsigned ()) |
c3e5cd34 PH |
701 | return (LONGEST) umax_of_size (TYPE_LENGTH (t)); |
702 | else | |
703 | return max_of_size (TYPE_LENGTH (t)); | |
704 | } | |
705 | ||
0963b4bd | 706 | /* Minimum value of integral type T, as a signed quantity. */ |
c3e5cd34 PH |
707 | static LONGEST |
708 | min_of_type (struct type *t) | |
709 | { | |
c6d940a9 | 710 | if (t->is_unsigned ()) |
c3e5cd34 PH |
711 | return 0; |
712 | else | |
713 | return min_of_size (TYPE_LENGTH (t)); | |
4c4b4cd2 PH |
714 | } |
715 | ||
716 | /* The largest value in the domain of TYPE, a discrete type, as an integer. */ | |
43bbcdc2 PH |
717 | LONGEST |
718 | ada_discrete_type_high_bound (struct type *type) | |
4c4b4cd2 | 719 | { |
b249d2c2 | 720 | type = resolve_dynamic_type (type, {}, 0); |
78134374 | 721 | switch (type->code ()) |
4c4b4cd2 PH |
722 | { |
723 | case TYPE_CODE_RANGE: | |
d1fd641e SM |
724 | { |
725 | const dynamic_prop &high = type->bounds ()->high; | |
726 | ||
727 | if (high.kind () == PROP_CONST) | |
728 | return high.const_val (); | |
729 | else | |
730 | { | |
731 | gdb_assert (high.kind () == PROP_UNDEFINED); | |
732 | ||
733 | /* This happens when trying to evaluate a type's dynamic bound | |
734 | without a live target. There is nothing relevant for us to | |
735 | return here, so return 0. */ | |
736 | return 0; | |
737 | } | |
738 | } | |
4c4b4cd2 | 739 | case TYPE_CODE_ENUM: |
1f704f76 | 740 | return TYPE_FIELD_ENUMVAL (type, type->num_fields () - 1); |
690cc4eb PH |
741 | case TYPE_CODE_BOOL: |
742 | return 1; | |
743 | case TYPE_CODE_CHAR: | |
76a01679 | 744 | case TYPE_CODE_INT: |
690cc4eb | 745 | return max_of_type (type); |
4c4b4cd2 | 746 | default: |
43bbcdc2 | 747 | error (_("Unexpected type in ada_discrete_type_high_bound.")); |
4c4b4cd2 PH |
748 | } |
749 | } | |
750 | ||
14e75d8e | 751 | /* The smallest value in the domain of TYPE, a discrete type, as an integer. */ |
43bbcdc2 PH |
752 | LONGEST |
753 | ada_discrete_type_low_bound (struct type *type) | |
4c4b4cd2 | 754 | { |
b249d2c2 | 755 | type = resolve_dynamic_type (type, {}, 0); |
78134374 | 756 | switch (type->code ()) |
4c4b4cd2 PH |
757 | { |
758 | case TYPE_CODE_RANGE: | |
d1fd641e SM |
759 | { |
760 | const dynamic_prop &low = type->bounds ()->low; | |
761 | ||
762 | if (low.kind () == PROP_CONST) | |
763 | return low.const_val (); | |
764 | else | |
765 | { | |
766 | gdb_assert (low.kind () == PROP_UNDEFINED); | |
767 | ||
768 | /* This happens when trying to evaluate a type's dynamic bound | |
769 | without a live target. There is nothing relevant for us to | |
770 | return here, so return 0. */ | |
771 | return 0; | |
772 | } | |
773 | } | |
4c4b4cd2 | 774 | case TYPE_CODE_ENUM: |
14e75d8e | 775 | return TYPE_FIELD_ENUMVAL (type, 0); |
690cc4eb PH |
776 | case TYPE_CODE_BOOL: |
777 | return 0; | |
778 | case TYPE_CODE_CHAR: | |
76a01679 | 779 | case TYPE_CODE_INT: |
690cc4eb | 780 | return min_of_type (type); |
4c4b4cd2 | 781 | default: |
43bbcdc2 | 782 | error (_("Unexpected type in ada_discrete_type_low_bound.")); |
4c4b4cd2 PH |
783 | } |
784 | } | |
785 | ||
786 | /* The identity on non-range types. For range types, the underlying | |
76a01679 | 787 | non-range scalar type. */ |
4c4b4cd2 PH |
788 | |
789 | static struct type * | |
18af8284 | 790 | get_base_type (struct type *type) |
4c4b4cd2 | 791 | { |
78134374 | 792 | while (type != NULL && type->code () == TYPE_CODE_RANGE) |
4c4b4cd2 | 793 | { |
76a01679 | 794 | if (type == TYPE_TARGET_TYPE (type) || TYPE_TARGET_TYPE (type) == NULL) |
dda83cd7 | 795 | return type; |
4c4b4cd2 PH |
796 | type = TYPE_TARGET_TYPE (type); |
797 | } | |
798 | return type; | |
14f9c5c9 | 799 | } |
41246937 JB |
800 | |
801 | /* Return a decoded version of the given VALUE. This means returning | |
802 | a value whose type is obtained by applying all the GNAT-specific | |
85102364 | 803 | encodings, making the resulting type a static but standard description |
41246937 JB |
804 | of the initial type. */ |
805 | ||
806 | struct value * | |
807 | ada_get_decoded_value (struct value *value) | |
808 | { | |
809 | struct type *type = ada_check_typedef (value_type (value)); | |
810 | ||
811 | if (ada_is_array_descriptor_type (type) | |
812 | || (ada_is_constrained_packed_array_type (type) | |
dda83cd7 | 813 | && type->code () != TYPE_CODE_PTR)) |
41246937 | 814 | { |
78134374 | 815 | if (type->code () == TYPE_CODE_TYPEDEF) /* array access type. */ |
dda83cd7 | 816 | value = ada_coerce_to_simple_array_ptr (value); |
41246937 | 817 | else |
dda83cd7 | 818 | value = ada_coerce_to_simple_array (value); |
41246937 JB |
819 | } |
820 | else | |
821 | value = ada_to_fixed_value (value); | |
822 | ||
823 | return value; | |
824 | } | |
825 | ||
826 | /* Same as ada_get_decoded_value, but with the given TYPE. | |
827 | Because there is no associated actual value for this type, | |
828 | the resulting type might be a best-effort approximation in | |
829 | the case of dynamic types. */ | |
830 | ||
831 | struct type * | |
832 | ada_get_decoded_type (struct type *type) | |
833 | { | |
834 | type = to_static_fixed_type (type); | |
835 | if (ada_is_constrained_packed_array_type (type)) | |
836 | type = ada_coerce_to_simple_array_type (type); | |
837 | return type; | |
838 | } | |
839 | ||
4c4b4cd2 | 840 | \f |
76a01679 | 841 | |
dda83cd7 | 842 | /* Language Selection */ |
14f9c5c9 AS |
843 | |
844 | /* If the main program is in Ada, return language_ada, otherwise return LANG | |
ccefe4c4 | 845 | (the main program is in Ada iif the adainit symbol is found). */ |
d2e4a39e | 846 | |
de93309a | 847 | static enum language |
ccefe4c4 | 848 | ada_update_initial_language (enum language lang) |
14f9c5c9 | 849 | { |
cafb3438 | 850 | if (lookup_minimal_symbol ("adainit", NULL, NULL).minsym != NULL) |
4c4b4cd2 | 851 | return language_ada; |
14f9c5c9 AS |
852 | |
853 | return lang; | |
854 | } | |
96d887e8 PH |
855 | |
856 | /* If the main procedure is written in Ada, then return its name. | |
857 | The result is good until the next call. Return NULL if the main | |
858 | procedure doesn't appear to be in Ada. */ | |
859 | ||
860 | char * | |
861 | ada_main_name (void) | |
862 | { | |
3b7344d5 | 863 | struct bound_minimal_symbol msym; |
e83e4e24 | 864 | static gdb::unique_xmalloc_ptr<char> main_program_name; |
6c038f32 | 865 | |
96d887e8 PH |
866 | /* For Ada, the name of the main procedure is stored in a specific |
867 | string constant, generated by the binder. Look for that symbol, | |
868 | extract its address, and then read that string. If we didn't find | |
869 | that string, then most probably the main procedure is not written | |
870 | in Ada. */ | |
871 | msym = lookup_minimal_symbol (ADA_MAIN_PROGRAM_SYMBOL_NAME, NULL, NULL); | |
872 | ||
3b7344d5 | 873 | if (msym.minsym != NULL) |
96d887e8 | 874 | { |
66920317 | 875 | CORE_ADDR main_program_name_addr = BMSYMBOL_VALUE_ADDRESS (msym); |
96d887e8 | 876 | if (main_program_name_addr == 0) |
dda83cd7 | 877 | error (_("Invalid address for Ada main program name.")); |
96d887e8 | 878 | |
66920317 | 879 | main_program_name = target_read_string (main_program_name_addr, 1024); |
e83e4e24 | 880 | return main_program_name.get (); |
96d887e8 PH |
881 | } |
882 | ||
883 | /* The main procedure doesn't seem to be in Ada. */ | |
884 | return NULL; | |
885 | } | |
14f9c5c9 | 886 | \f |
dda83cd7 | 887 | /* Symbols */ |
d2e4a39e | 888 | |
4c4b4cd2 PH |
889 | /* Table of Ada operators and their GNAT-encoded names. Last entry is pair |
890 | of NULLs. */ | |
14f9c5c9 | 891 | |
d2e4a39e AS |
892 | const struct ada_opname_map ada_opname_table[] = { |
893 | {"Oadd", "\"+\"", BINOP_ADD}, | |
894 | {"Osubtract", "\"-\"", BINOP_SUB}, | |
895 | {"Omultiply", "\"*\"", BINOP_MUL}, | |
896 | {"Odivide", "\"/\"", BINOP_DIV}, | |
897 | {"Omod", "\"mod\"", BINOP_MOD}, | |
898 | {"Orem", "\"rem\"", BINOP_REM}, | |
899 | {"Oexpon", "\"**\"", BINOP_EXP}, | |
900 | {"Olt", "\"<\"", BINOP_LESS}, | |
901 | {"Ole", "\"<=\"", BINOP_LEQ}, | |
902 | {"Ogt", "\">\"", BINOP_GTR}, | |
903 | {"Oge", "\">=\"", BINOP_GEQ}, | |
904 | {"Oeq", "\"=\"", BINOP_EQUAL}, | |
905 | {"One", "\"/=\"", BINOP_NOTEQUAL}, | |
906 | {"Oand", "\"and\"", BINOP_BITWISE_AND}, | |
907 | {"Oor", "\"or\"", BINOP_BITWISE_IOR}, | |
908 | {"Oxor", "\"xor\"", BINOP_BITWISE_XOR}, | |
909 | {"Oconcat", "\"&\"", BINOP_CONCAT}, | |
910 | {"Oabs", "\"abs\"", UNOP_ABS}, | |
911 | {"Onot", "\"not\"", UNOP_LOGICAL_NOT}, | |
912 | {"Oadd", "\"+\"", UNOP_PLUS}, | |
913 | {"Osubtract", "\"-\"", UNOP_NEG}, | |
914 | {NULL, NULL} | |
14f9c5c9 AS |
915 | }; |
916 | ||
5c4258f4 | 917 | /* The "encoded" form of DECODED, according to GNAT conventions. If |
b5ec771e | 918 | THROW_ERRORS, throw an error if invalid operator name is found. |
5c4258f4 | 919 | Otherwise, return the empty string in that case. */ |
4c4b4cd2 | 920 | |
5c4258f4 | 921 | static std::string |
b5ec771e | 922 | ada_encode_1 (const char *decoded, bool throw_errors) |
14f9c5c9 | 923 | { |
4c4b4cd2 | 924 | if (decoded == NULL) |
5c4258f4 | 925 | return {}; |
14f9c5c9 | 926 | |
5c4258f4 TT |
927 | std::string encoding_buffer; |
928 | for (const char *p = decoded; *p != '\0'; p += 1) | |
14f9c5c9 | 929 | { |
cdc7bb92 | 930 | if (*p == '.') |
5c4258f4 | 931 | encoding_buffer.append ("__"); |
14f9c5c9 | 932 | else if (*p == '"') |
dda83cd7 SM |
933 | { |
934 | const struct ada_opname_map *mapping; | |
935 | ||
936 | for (mapping = ada_opname_table; | |
937 | mapping->encoded != NULL | |
938 | && !startswith (p, mapping->decoded); mapping += 1) | |
939 | ; | |
940 | if (mapping->encoded == NULL) | |
b5ec771e PA |
941 | { |
942 | if (throw_errors) | |
943 | error (_("invalid Ada operator name: %s"), p); | |
944 | else | |
5c4258f4 | 945 | return {}; |
b5ec771e | 946 | } |
5c4258f4 | 947 | encoding_buffer.append (mapping->encoded); |
dda83cd7 SM |
948 | break; |
949 | } | |
d2e4a39e | 950 | else |
5c4258f4 | 951 | encoding_buffer.push_back (*p); |
14f9c5c9 AS |
952 | } |
953 | ||
4c4b4cd2 | 954 | return encoding_buffer; |
14f9c5c9 AS |
955 | } |
956 | ||
5c4258f4 | 957 | /* The "encoded" form of DECODED, according to GNAT conventions. */ |
b5ec771e | 958 | |
5c4258f4 | 959 | std::string |
b5ec771e PA |
960 | ada_encode (const char *decoded) |
961 | { | |
962 | return ada_encode_1 (decoded, true); | |
963 | } | |
964 | ||
14f9c5c9 | 965 | /* Return NAME folded to lower case, or, if surrounded by single |
4c4b4cd2 PH |
966 | quotes, unfolded, but with the quotes stripped away. Result good |
967 | to next call. */ | |
968 | ||
de93309a | 969 | static char * |
e0802d59 | 970 | ada_fold_name (gdb::string_view name) |
14f9c5c9 | 971 | { |
d2e4a39e | 972 | static char *fold_buffer = NULL; |
14f9c5c9 AS |
973 | static size_t fold_buffer_size = 0; |
974 | ||
e0802d59 | 975 | int len = name.size (); |
d2e4a39e | 976 | GROW_VECT (fold_buffer, fold_buffer_size, len + 1); |
14f9c5c9 AS |
977 | |
978 | if (name[0] == '\'') | |
979 | { | |
e0802d59 | 980 | strncpy (fold_buffer, name.data () + 1, len - 2); |
d2e4a39e | 981 | fold_buffer[len - 2] = '\000'; |
14f9c5c9 AS |
982 | } |
983 | else | |
984 | { | |
985 | int i; | |
5b4ee69b | 986 | |
14f9c5c9 | 987 | for (i = 0; i <= len; i += 1) |
dda83cd7 | 988 | fold_buffer[i] = tolower (name[i]); |
14f9c5c9 AS |
989 | } |
990 | ||
991 | return fold_buffer; | |
992 | } | |
993 | ||
529cad9c PH |
994 | /* Return nonzero if C is either a digit or a lowercase alphabet character. */ |
995 | ||
996 | static int | |
997 | is_lower_alphanum (const char c) | |
998 | { | |
999 | return (isdigit (c) || (isalpha (c) && islower (c))); | |
1000 | } | |
1001 | ||
c90092fe JB |
1002 | /* ENCODED is the linkage name of a symbol and LEN contains its length. |
1003 | This function saves in LEN the length of that same symbol name but | |
1004 | without either of these suffixes: | |
29480c32 JB |
1005 | . .{DIGIT}+ |
1006 | . ${DIGIT}+ | |
1007 | . ___{DIGIT}+ | |
1008 | . __{DIGIT}+. | |
c90092fe | 1009 | |
29480c32 JB |
1010 | These are suffixes introduced by the compiler for entities such as |
1011 | nested subprogram for instance, in order to avoid name clashes. | |
1012 | They do not serve any purpose for the debugger. */ | |
1013 | ||
1014 | static void | |
1015 | ada_remove_trailing_digits (const char *encoded, int *len) | |
1016 | { | |
1017 | if (*len > 1 && isdigit (encoded[*len - 1])) | |
1018 | { | |
1019 | int i = *len - 2; | |
5b4ee69b | 1020 | |
29480c32 | 1021 | while (i > 0 && isdigit (encoded[i])) |
dda83cd7 | 1022 | i--; |
29480c32 | 1023 | if (i >= 0 && encoded[i] == '.') |
dda83cd7 | 1024 | *len = i; |
29480c32 | 1025 | else if (i >= 0 && encoded[i] == '$') |
dda83cd7 | 1026 | *len = i; |
61012eef | 1027 | else if (i >= 2 && startswith (encoded + i - 2, "___")) |
dda83cd7 | 1028 | *len = i - 2; |
61012eef | 1029 | else if (i >= 1 && startswith (encoded + i - 1, "__")) |
dda83cd7 | 1030 | *len = i - 1; |
29480c32 JB |
1031 | } |
1032 | } | |
1033 | ||
1034 | /* Remove the suffix introduced by the compiler for protected object | |
1035 | subprograms. */ | |
1036 | ||
1037 | static void | |
1038 | ada_remove_po_subprogram_suffix (const char *encoded, int *len) | |
1039 | { | |
1040 | /* Remove trailing N. */ | |
1041 | ||
1042 | /* Protected entry subprograms are broken into two | |
1043 | separate subprograms: The first one is unprotected, and has | |
1044 | a 'N' suffix; the second is the protected version, and has | |
0963b4bd | 1045 | the 'P' suffix. The second calls the first one after handling |
29480c32 JB |
1046 | the protection. Since the P subprograms are internally generated, |
1047 | we leave these names undecoded, giving the user a clue that this | |
1048 | entity is internal. */ | |
1049 | ||
1050 | if (*len > 1 | |
1051 | && encoded[*len - 1] == 'N' | |
1052 | && (isdigit (encoded[*len - 2]) || islower (encoded[*len - 2]))) | |
1053 | *len = *len - 1; | |
1054 | } | |
1055 | ||
1056 | /* If ENCODED follows the GNAT entity encoding conventions, then return | |
1057 | the decoded form of ENCODED. Otherwise, return "<%s>" where "%s" is | |
f945dedf | 1058 | replaced by ENCODED. */ |
14f9c5c9 | 1059 | |
f945dedf | 1060 | std::string |
4c4b4cd2 | 1061 | ada_decode (const char *encoded) |
14f9c5c9 AS |
1062 | { |
1063 | int i, j; | |
1064 | int len0; | |
d2e4a39e | 1065 | const char *p; |
14f9c5c9 | 1066 | int at_start_name; |
f945dedf | 1067 | std::string decoded; |
d2e4a39e | 1068 | |
0d81f350 JG |
1069 | /* With function descriptors on PPC64, the value of a symbol named |
1070 | ".FN", if it exists, is the entry point of the function "FN". */ | |
1071 | if (encoded[0] == '.') | |
1072 | encoded += 1; | |
1073 | ||
29480c32 JB |
1074 | /* The name of the Ada main procedure starts with "_ada_". |
1075 | This prefix is not part of the decoded name, so skip this part | |
1076 | if we see this prefix. */ | |
61012eef | 1077 | if (startswith (encoded, "_ada_")) |
4c4b4cd2 | 1078 | encoded += 5; |
14f9c5c9 | 1079 | |
29480c32 JB |
1080 | /* If the name starts with '_', then it is not a properly encoded |
1081 | name, so do not attempt to decode it. Similarly, if the name | |
1082 | starts with '<', the name should not be decoded. */ | |
4c4b4cd2 | 1083 | if (encoded[0] == '_' || encoded[0] == '<') |
14f9c5c9 AS |
1084 | goto Suppress; |
1085 | ||
4c4b4cd2 | 1086 | len0 = strlen (encoded); |
4c4b4cd2 | 1087 | |
29480c32 JB |
1088 | ada_remove_trailing_digits (encoded, &len0); |
1089 | ada_remove_po_subprogram_suffix (encoded, &len0); | |
529cad9c | 1090 | |
4c4b4cd2 PH |
1091 | /* Remove the ___X.* suffix if present. Do not forget to verify that |
1092 | the suffix is located before the current "end" of ENCODED. We want | |
1093 | to avoid re-matching parts of ENCODED that have previously been | |
1094 | marked as discarded (by decrementing LEN0). */ | |
1095 | p = strstr (encoded, "___"); | |
1096 | if (p != NULL && p - encoded < len0 - 3) | |
14f9c5c9 AS |
1097 | { |
1098 | if (p[3] == 'X') | |
dda83cd7 | 1099 | len0 = p - encoded; |
14f9c5c9 | 1100 | else |
dda83cd7 | 1101 | goto Suppress; |
14f9c5c9 | 1102 | } |
4c4b4cd2 | 1103 | |
29480c32 JB |
1104 | /* Remove any trailing TKB suffix. It tells us that this symbol |
1105 | is for the body of a task, but that information does not actually | |
1106 | appear in the decoded name. */ | |
1107 | ||
61012eef | 1108 | if (len0 > 3 && startswith (encoded + len0 - 3, "TKB")) |
14f9c5c9 | 1109 | len0 -= 3; |
76a01679 | 1110 | |
a10967fa JB |
1111 | /* Remove any trailing TB suffix. The TB suffix is slightly different |
1112 | from the TKB suffix because it is used for non-anonymous task | |
1113 | bodies. */ | |
1114 | ||
61012eef | 1115 | if (len0 > 2 && startswith (encoded + len0 - 2, "TB")) |
a10967fa JB |
1116 | len0 -= 2; |
1117 | ||
29480c32 JB |
1118 | /* Remove trailing "B" suffixes. */ |
1119 | /* FIXME: brobecker/2006-04-19: Not sure what this are used for... */ | |
1120 | ||
61012eef | 1121 | if (len0 > 1 && startswith (encoded + len0 - 1, "B")) |
14f9c5c9 AS |
1122 | len0 -= 1; |
1123 | ||
4c4b4cd2 | 1124 | /* Make decoded big enough for possible expansion by operator name. */ |
29480c32 | 1125 | |
f945dedf | 1126 | decoded.resize (2 * len0 + 1, 'X'); |
14f9c5c9 | 1127 | |
29480c32 JB |
1128 | /* Remove trailing __{digit}+ or trailing ${digit}+. */ |
1129 | ||
4c4b4cd2 | 1130 | if (len0 > 1 && isdigit (encoded[len0 - 1])) |
d2e4a39e | 1131 | { |
4c4b4cd2 PH |
1132 | i = len0 - 2; |
1133 | while ((i >= 0 && isdigit (encoded[i])) | |
dda83cd7 SM |
1134 | || (i >= 1 && encoded[i] == '_' && isdigit (encoded[i - 1]))) |
1135 | i -= 1; | |
4c4b4cd2 | 1136 | if (i > 1 && encoded[i] == '_' && encoded[i - 1] == '_') |
dda83cd7 | 1137 | len0 = i - 1; |
4c4b4cd2 | 1138 | else if (encoded[i] == '$') |
dda83cd7 | 1139 | len0 = i; |
d2e4a39e | 1140 | } |
14f9c5c9 | 1141 | |
29480c32 JB |
1142 | /* The first few characters that are not alphabetic are not part |
1143 | of any encoding we use, so we can copy them over verbatim. */ | |
1144 | ||
4c4b4cd2 PH |
1145 | for (i = 0, j = 0; i < len0 && !isalpha (encoded[i]); i += 1, j += 1) |
1146 | decoded[j] = encoded[i]; | |
14f9c5c9 AS |
1147 | |
1148 | at_start_name = 1; | |
1149 | while (i < len0) | |
1150 | { | |
29480c32 | 1151 | /* Is this a symbol function? */ |
4c4b4cd2 | 1152 | if (at_start_name && encoded[i] == 'O') |
dda83cd7 SM |
1153 | { |
1154 | int k; | |
1155 | ||
1156 | for (k = 0; ada_opname_table[k].encoded != NULL; k += 1) | |
1157 | { | |
1158 | int op_len = strlen (ada_opname_table[k].encoded); | |
1159 | if ((strncmp (ada_opname_table[k].encoded + 1, encoded + i + 1, | |
1160 | op_len - 1) == 0) | |
1161 | && !isalnum (encoded[i + op_len])) | |
1162 | { | |
1163 | strcpy (&decoded.front() + j, ada_opname_table[k].decoded); | |
1164 | at_start_name = 0; | |
1165 | i += op_len; | |
1166 | j += strlen (ada_opname_table[k].decoded); | |
1167 | break; | |
1168 | } | |
1169 | } | |
1170 | if (ada_opname_table[k].encoded != NULL) | |
1171 | continue; | |
1172 | } | |
14f9c5c9 AS |
1173 | at_start_name = 0; |
1174 | ||
529cad9c | 1175 | /* Replace "TK__" with "__", which will eventually be translated |
dda83cd7 | 1176 | into "." (just below). */ |
529cad9c | 1177 | |
61012eef | 1178 | if (i < len0 - 4 && startswith (encoded + i, "TK__")) |
dda83cd7 | 1179 | i += 2; |
529cad9c | 1180 | |
29480c32 | 1181 | /* Replace "__B_{DIGITS}+__" sequences by "__", which will eventually |
dda83cd7 SM |
1182 | be translated into "." (just below). These are internal names |
1183 | generated for anonymous blocks inside which our symbol is nested. */ | |
29480c32 JB |
1184 | |
1185 | if (len0 - i > 5 && encoded [i] == '_' && encoded [i+1] == '_' | |
dda83cd7 SM |
1186 | && encoded [i+2] == 'B' && encoded [i+3] == '_' |
1187 | && isdigit (encoded [i+4])) | |
1188 | { | |
1189 | int k = i + 5; | |
1190 | ||
1191 | while (k < len0 && isdigit (encoded[k])) | |
1192 | k++; /* Skip any extra digit. */ | |
1193 | ||
1194 | /* Double-check that the "__B_{DIGITS}+" sequence we found | |
1195 | is indeed followed by "__". */ | |
1196 | if (len0 - k > 2 && encoded [k] == '_' && encoded [k+1] == '_') | |
1197 | i = k; | |
1198 | } | |
29480c32 | 1199 | |
529cad9c PH |
1200 | /* Remove _E{DIGITS}+[sb] */ |
1201 | ||
1202 | /* Just as for protected object subprograms, there are 2 categories | |
dda83cd7 SM |
1203 | of subprograms created by the compiler for each entry. The first |
1204 | one implements the actual entry code, and has a suffix following | |
1205 | the convention above; the second one implements the barrier and | |
1206 | uses the same convention as above, except that the 'E' is replaced | |
1207 | by a 'B'. | |
529cad9c | 1208 | |
dda83cd7 SM |
1209 | Just as above, we do not decode the name of barrier functions |
1210 | to give the user a clue that the code he is debugging has been | |
1211 | internally generated. */ | |
529cad9c PH |
1212 | |
1213 | if (len0 - i > 3 && encoded [i] == '_' && encoded[i+1] == 'E' | |
dda83cd7 SM |
1214 | && isdigit (encoded[i+2])) |
1215 | { | |
1216 | int k = i + 3; | |
1217 | ||
1218 | while (k < len0 && isdigit (encoded[k])) | |
1219 | k++; | |
1220 | ||
1221 | if (k < len0 | |
1222 | && (encoded[k] == 'b' || encoded[k] == 's')) | |
1223 | { | |
1224 | k++; | |
1225 | /* Just as an extra precaution, make sure that if this | |
1226 | suffix is followed by anything else, it is a '_'. | |
1227 | Otherwise, we matched this sequence by accident. */ | |
1228 | if (k == len0 | |
1229 | || (k < len0 && encoded[k] == '_')) | |
1230 | i = k; | |
1231 | } | |
1232 | } | |
529cad9c PH |
1233 | |
1234 | /* Remove trailing "N" in [a-z0-9]+N__. The N is added by | |
dda83cd7 | 1235 | the GNAT front-end in protected object subprograms. */ |
529cad9c PH |
1236 | |
1237 | if (i < len0 + 3 | |
dda83cd7 SM |
1238 | && encoded[i] == 'N' && encoded[i+1] == '_' && encoded[i+2] == '_') |
1239 | { | |
1240 | /* Backtrack a bit up until we reach either the begining of | |
1241 | the encoded name, or "__". Make sure that we only find | |
1242 | digits or lowercase characters. */ | |
1243 | const char *ptr = encoded + i - 1; | |
1244 | ||
1245 | while (ptr >= encoded && is_lower_alphanum (ptr[0])) | |
1246 | ptr--; | |
1247 | if (ptr < encoded | |
1248 | || (ptr > encoded && ptr[0] == '_' && ptr[-1] == '_')) | |
1249 | i++; | |
1250 | } | |
529cad9c | 1251 | |
4c4b4cd2 | 1252 | if (encoded[i] == 'X' && i != 0 && isalnum (encoded[i - 1])) |
dda83cd7 SM |
1253 | { |
1254 | /* This is a X[bn]* sequence not separated from the previous | |
1255 | part of the name with a non-alpha-numeric character (in other | |
1256 | words, immediately following an alpha-numeric character), then | |
1257 | verify that it is placed at the end of the encoded name. If | |
1258 | not, then the encoding is not valid and we should abort the | |
1259 | decoding. Otherwise, just skip it, it is used in body-nested | |
1260 | package names. */ | |
1261 | do | |
1262 | i += 1; | |
1263 | while (i < len0 && (encoded[i] == 'b' || encoded[i] == 'n')); | |
1264 | if (i < len0) | |
1265 | goto Suppress; | |
1266 | } | |
cdc7bb92 | 1267 | else if (i < len0 - 2 && encoded[i] == '_' && encoded[i + 1] == '_') |
dda83cd7 SM |
1268 | { |
1269 | /* Replace '__' by '.'. */ | |
1270 | decoded[j] = '.'; | |
1271 | at_start_name = 1; | |
1272 | i += 2; | |
1273 | j += 1; | |
1274 | } | |
14f9c5c9 | 1275 | else |
dda83cd7 SM |
1276 | { |
1277 | /* It's a character part of the decoded name, so just copy it | |
1278 | over. */ | |
1279 | decoded[j] = encoded[i]; | |
1280 | i += 1; | |
1281 | j += 1; | |
1282 | } | |
14f9c5c9 | 1283 | } |
f945dedf | 1284 | decoded.resize (j); |
14f9c5c9 | 1285 | |
29480c32 JB |
1286 | /* Decoded names should never contain any uppercase character. |
1287 | Double-check this, and abort the decoding if we find one. */ | |
1288 | ||
f945dedf | 1289 | for (i = 0; i < decoded.length(); ++i) |
4c4b4cd2 | 1290 | if (isupper (decoded[i]) || decoded[i] == ' ') |
14f9c5c9 AS |
1291 | goto Suppress; |
1292 | ||
f945dedf | 1293 | return decoded; |
14f9c5c9 AS |
1294 | |
1295 | Suppress: | |
4c4b4cd2 | 1296 | if (encoded[0] == '<') |
f945dedf | 1297 | decoded = encoded; |
14f9c5c9 | 1298 | else |
f945dedf | 1299 | decoded = '<' + std::string(encoded) + '>'; |
4c4b4cd2 PH |
1300 | return decoded; |
1301 | ||
1302 | } | |
1303 | ||
1304 | /* Table for keeping permanent unique copies of decoded names. Once | |
1305 | allocated, names in this table are never released. While this is a | |
1306 | storage leak, it should not be significant unless there are massive | |
1307 | changes in the set of decoded names in successive versions of a | |
1308 | symbol table loaded during a single session. */ | |
1309 | static struct htab *decoded_names_store; | |
1310 | ||
1311 | /* Returns the decoded name of GSYMBOL, as for ada_decode, caching it | |
1312 | in the language-specific part of GSYMBOL, if it has not been | |
1313 | previously computed. Tries to save the decoded name in the same | |
1314 | obstack as GSYMBOL, if possible, and otherwise on the heap (so that, | |
1315 | in any case, the decoded symbol has a lifetime at least that of | |
0963b4bd | 1316 | GSYMBOL). |
4c4b4cd2 PH |
1317 | The GSYMBOL parameter is "mutable" in the C++ sense: logically |
1318 | const, but nevertheless modified to a semantically equivalent form | |
0963b4bd | 1319 | when a decoded name is cached in it. */ |
4c4b4cd2 | 1320 | |
45e6c716 | 1321 | const char * |
f85f34ed | 1322 | ada_decode_symbol (const struct general_symbol_info *arg) |
4c4b4cd2 | 1323 | { |
f85f34ed TT |
1324 | struct general_symbol_info *gsymbol = (struct general_symbol_info *) arg; |
1325 | const char **resultp = | |
615b3f62 | 1326 | &gsymbol->language_specific.demangled_name; |
5b4ee69b | 1327 | |
f85f34ed | 1328 | if (!gsymbol->ada_mangled) |
4c4b4cd2 | 1329 | { |
4d4eaa30 | 1330 | std::string decoded = ada_decode (gsymbol->linkage_name ()); |
f85f34ed | 1331 | struct obstack *obstack = gsymbol->language_specific.obstack; |
5b4ee69b | 1332 | |
f85f34ed | 1333 | gsymbol->ada_mangled = 1; |
5b4ee69b | 1334 | |
f85f34ed | 1335 | if (obstack != NULL) |
f945dedf | 1336 | *resultp = obstack_strdup (obstack, decoded.c_str ()); |
f85f34ed | 1337 | else |
dda83cd7 | 1338 | { |
f85f34ed TT |
1339 | /* Sometimes, we can't find a corresponding objfile, in |
1340 | which case, we put the result on the heap. Since we only | |
1341 | decode when needed, we hope this usually does not cause a | |
1342 | significant memory leak (FIXME). */ | |
1343 | ||
dda83cd7 SM |
1344 | char **slot = (char **) htab_find_slot (decoded_names_store, |
1345 | decoded.c_str (), INSERT); | |
5b4ee69b | 1346 | |
dda83cd7 SM |
1347 | if (*slot == NULL) |
1348 | *slot = xstrdup (decoded.c_str ()); | |
1349 | *resultp = *slot; | |
1350 | } | |
4c4b4cd2 | 1351 | } |
14f9c5c9 | 1352 | |
4c4b4cd2 PH |
1353 | return *resultp; |
1354 | } | |
76a01679 | 1355 | |
2c0b251b | 1356 | static char * |
76a01679 | 1357 | ada_la_decode (const char *encoded, int options) |
4c4b4cd2 | 1358 | { |
f945dedf | 1359 | return xstrdup (ada_decode (encoded).c_str ()); |
14f9c5c9 AS |
1360 | } |
1361 | ||
14f9c5c9 | 1362 | \f |
d2e4a39e | 1363 | |
dda83cd7 | 1364 | /* Arrays */ |
14f9c5c9 | 1365 | |
28c85d6c JB |
1366 | /* Assuming that INDEX_DESC_TYPE is an ___XA structure, a structure |
1367 | generated by the GNAT compiler to describe the index type used | |
1368 | for each dimension of an array, check whether it follows the latest | |
1369 | known encoding. If not, fix it up to conform to the latest encoding. | |
1370 | Otherwise, do nothing. This function also does nothing if | |
1371 | INDEX_DESC_TYPE is NULL. | |
1372 | ||
85102364 | 1373 | The GNAT encoding used to describe the array index type evolved a bit. |
28c85d6c JB |
1374 | Initially, the information would be provided through the name of each |
1375 | field of the structure type only, while the type of these fields was | |
1376 | described as unspecified and irrelevant. The debugger was then expected | |
1377 | to perform a global type lookup using the name of that field in order | |
1378 | to get access to the full index type description. Because these global | |
1379 | lookups can be very expensive, the encoding was later enhanced to make | |
1380 | the global lookup unnecessary by defining the field type as being | |
1381 | the full index type description. | |
1382 | ||
1383 | The purpose of this routine is to allow us to support older versions | |
1384 | of the compiler by detecting the use of the older encoding, and by | |
1385 | fixing up the INDEX_DESC_TYPE to follow the new one (at this point, | |
1386 | we essentially replace each field's meaningless type by the associated | |
1387 | index subtype). */ | |
1388 | ||
1389 | void | |
1390 | ada_fixup_array_indexes_type (struct type *index_desc_type) | |
1391 | { | |
1392 | int i; | |
1393 | ||
1394 | if (index_desc_type == NULL) | |
1395 | return; | |
1f704f76 | 1396 | gdb_assert (index_desc_type->num_fields () > 0); |
28c85d6c JB |
1397 | |
1398 | /* Check if INDEX_DESC_TYPE follows the older encoding (it is sufficient | |
1399 | to check one field only, no need to check them all). If not, return | |
1400 | now. | |
1401 | ||
1402 | If our INDEX_DESC_TYPE was generated using the older encoding, | |
1403 | the field type should be a meaningless integer type whose name | |
1404 | is not equal to the field name. */ | |
940da03e SM |
1405 | if (index_desc_type->field (0).type ()->name () != NULL |
1406 | && strcmp (index_desc_type->field (0).type ()->name (), | |
dda83cd7 | 1407 | TYPE_FIELD_NAME (index_desc_type, 0)) == 0) |
28c85d6c JB |
1408 | return; |
1409 | ||
1410 | /* Fixup each field of INDEX_DESC_TYPE. */ | |
1f704f76 | 1411 | for (i = 0; i < index_desc_type->num_fields (); i++) |
28c85d6c | 1412 | { |
0d5cff50 | 1413 | const char *name = TYPE_FIELD_NAME (index_desc_type, i); |
28c85d6c JB |
1414 | struct type *raw_type = ada_check_typedef (ada_find_any_type (name)); |
1415 | ||
1416 | if (raw_type) | |
5d14b6e5 | 1417 | index_desc_type->field (i).set_type (raw_type); |
28c85d6c JB |
1418 | } |
1419 | } | |
1420 | ||
4c4b4cd2 PH |
1421 | /* The desc_* routines return primitive portions of array descriptors |
1422 | (fat pointers). */ | |
14f9c5c9 AS |
1423 | |
1424 | /* The descriptor or array type, if any, indicated by TYPE; removes | |
4c4b4cd2 PH |
1425 | level of indirection, if needed. */ |
1426 | ||
d2e4a39e AS |
1427 | static struct type * |
1428 | desc_base_type (struct type *type) | |
14f9c5c9 AS |
1429 | { |
1430 | if (type == NULL) | |
1431 | return NULL; | |
61ee279c | 1432 | type = ada_check_typedef (type); |
78134374 | 1433 | if (type->code () == TYPE_CODE_TYPEDEF) |
720d1a40 JB |
1434 | type = ada_typedef_target_type (type); |
1435 | ||
1265e4aa | 1436 | if (type != NULL |
78134374 | 1437 | && (type->code () == TYPE_CODE_PTR |
dda83cd7 | 1438 | || type->code () == TYPE_CODE_REF)) |
61ee279c | 1439 | return ada_check_typedef (TYPE_TARGET_TYPE (type)); |
14f9c5c9 AS |
1440 | else |
1441 | return type; | |
1442 | } | |
1443 | ||
4c4b4cd2 PH |
1444 | /* True iff TYPE indicates a "thin" array pointer type. */ |
1445 | ||
14f9c5c9 | 1446 | static int |
d2e4a39e | 1447 | is_thin_pntr (struct type *type) |
14f9c5c9 | 1448 | { |
d2e4a39e | 1449 | return |
14f9c5c9 AS |
1450 | is_suffix (ada_type_name (desc_base_type (type)), "___XUT") |
1451 | || is_suffix (ada_type_name (desc_base_type (type)), "___XUT___XVE"); | |
1452 | } | |
1453 | ||
4c4b4cd2 PH |
1454 | /* The descriptor type for thin pointer type TYPE. */ |
1455 | ||
d2e4a39e AS |
1456 | static struct type * |
1457 | thin_descriptor_type (struct type *type) | |
14f9c5c9 | 1458 | { |
d2e4a39e | 1459 | struct type *base_type = desc_base_type (type); |
5b4ee69b | 1460 | |
14f9c5c9 AS |
1461 | if (base_type == NULL) |
1462 | return NULL; | |
1463 | if (is_suffix (ada_type_name (base_type), "___XVE")) | |
1464 | return base_type; | |
d2e4a39e | 1465 | else |
14f9c5c9 | 1466 | { |
d2e4a39e | 1467 | struct type *alt_type = ada_find_parallel_type (base_type, "___XVE"); |
5b4ee69b | 1468 | |
14f9c5c9 | 1469 | if (alt_type == NULL) |
dda83cd7 | 1470 | return base_type; |
14f9c5c9 | 1471 | else |
dda83cd7 | 1472 | return alt_type; |
14f9c5c9 AS |
1473 | } |
1474 | } | |
1475 | ||
4c4b4cd2 PH |
1476 | /* A pointer to the array data for thin-pointer value VAL. */ |
1477 | ||
d2e4a39e AS |
1478 | static struct value * |
1479 | thin_data_pntr (struct value *val) | |
14f9c5c9 | 1480 | { |
828292f2 | 1481 | struct type *type = ada_check_typedef (value_type (val)); |
556bdfd4 | 1482 | struct type *data_type = desc_data_target_type (thin_descriptor_type (type)); |
5b4ee69b | 1483 | |
556bdfd4 UW |
1484 | data_type = lookup_pointer_type (data_type); |
1485 | ||
78134374 | 1486 | if (type->code () == TYPE_CODE_PTR) |
556bdfd4 | 1487 | return value_cast (data_type, value_copy (val)); |
d2e4a39e | 1488 | else |
42ae5230 | 1489 | return value_from_longest (data_type, value_address (val)); |
14f9c5c9 AS |
1490 | } |
1491 | ||
4c4b4cd2 PH |
1492 | /* True iff TYPE indicates a "thick" array pointer type. */ |
1493 | ||
14f9c5c9 | 1494 | static int |
d2e4a39e | 1495 | is_thick_pntr (struct type *type) |
14f9c5c9 AS |
1496 | { |
1497 | type = desc_base_type (type); | |
78134374 | 1498 | return (type != NULL && type->code () == TYPE_CODE_STRUCT |
dda83cd7 | 1499 | && lookup_struct_elt_type (type, "P_BOUNDS", 1) != NULL); |
14f9c5c9 AS |
1500 | } |
1501 | ||
4c4b4cd2 PH |
1502 | /* If TYPE is the type of an array descriptor (fat or thin pointer) or a |
1503 | pointer to one, the type of its bounds data; otherwise, NULL. */ | |
76a01679 | 1504 | |
d2e4a39e AS |
1505 | static struct type * |
1506 | desc_bounds_type (struct type *type) | |
14f9c5c9 | 1507 | { |
d2e4a39e | 1508 | struct type *r; |
14f9c5c9 AS |
1509 | |
1510 | type = desc_base_type (type); | |
1511 | ||
1512 | if (type == NULL) | |
1513 | return NULL; | |
1514 | else if (is_thin_pntr (type)) | |
1515 | { | |
1516 | type = thin_descriptor_type (type); | |
1517 | if (type == NULL) | |
dda83cd7 | 1518 | return NULL; |
14f9c5c9 AS |
1519 | r = lookup_struct_elt_type (type, "BOUNDS", 1); |
1520 | if (r != NULL) | |
dda83cd7 | 1521 | return ada_check_typedef (r); |
14f9c5c9 | 1522 | } |
78134374 | 1523 | else if (type->code () == TYPE_CODE_STRUCT) |
14f9c5c9 AS |
1524 | { |
1525 | r = lookup_struct_elt_type (type, "P_BOUNDS", 1); | |
1526 | if (r != NULL) | |
dda83cd7 | 1527 | return ada_check_typedef (TYPE_TARGET_TYPE (ada_check_typedef (r))); |
14f9c5c9 AS |
1528 | } |
1529 | return NULL; | |
1530 | } | |
1531 | ||
1532 | /* If ARR is an array descriptor (fat or thin pointer), or pointer to | |
4c4b4cd2 PH |
1533 | one, a pointer to its bounds data. Otherwise NULL. */ |
1534 | ||
d2e4a39e AS |
1535 | static struct value * |
1536 | desc_bounds (struct value *arr) | |
14f9c5c9 | 1537 | { |
df407dfe | 1538 | struct type *type = ada_check_typedef (value_type (arr)); |
5b4ee69b | 1539 | |
d2e4a39e | 1540 | if (is_thin_pntr (type)) |
14f9c5c9 | 1541 | { |
d2e4a39e | 1542 | struct type *bounds_type = |
dda83cd7 | 1543 | desc_bounds_type (thin_descriptor_type (type)); |
14f9c5c9 AS |
1544 | LONGEST addr; |
1545 | ||
4cdfadb1 | 1546 | if (bounds_type == NULL) |
dda83cd7 | 1547 | error (_("Bad GNAT array descriptor")); |
14f9c5c9 AS |
1548 | |
1549 | /* NOTE: The following calculation is not really kosher, but | |
dda83cd7 SM |
1550 | since desc_type is an XVE-encoded type (and shouldn't be), |
1551 | the correct calculation is a real pain. FIXME (and fix GCC). */ | |
78134374 | 1552 | if (type->code () == TYPE_CODE_PTR) |
dda83cd7 | 1553 | addr = value_as_long (arr); |
d2e4a39e | 1554 | else |
dda83cd7 | 1555 | addr = value_address (arr); |
14f9c5c9 | 1556 | |
d2e4a39e | 1557 | return |
dda83cd7 SM |
1558 | value_from_longest (lookup_pointer_type (bounds_type), |
1559 | addr - TYPE_LENGTH (bounds_type)); | |
14f9c5c9 AS |
1560 | } |
1561 | ||
1562 | else if (is_thick_pntr (type)) | |
05e522ef JB |
1563 | { |
1564 | struct value *p_bounds = value_struct_elt (&arr, NULL, "P_BOUNDS", NULL, | |
1565 | _("Bad GNAT array descriptor")); | |
1566 | struct type *p_bounds_type = value_type (p_bounds); | |
1567 | ||
1568 | if (p_bounds_type | |
78134374 | 1569 | && p_bounds_type->code () == TYPE_CODE_PTR) |
05e522ef JB |
1570 | { |
1571 | struct type *target_type = TYPE_TARGET_TYPE (p_bounds_type); | |
1572 | ||
e46d3488 | 1573 | if (target_type->is_stub ()) |
05e522ef JB |
1574 | p_bounds = value_cast (lookup_pointer_type |
1575 | (ada_check_typedef (target_type)), | |
1576 | p_bounds); | |
1577 | } | |
1578 | else | |
1579 | error (_("Bad GNAT array descriptor")); | |
1580 | ||
1581 | return p_bounds; | |
1582 | } | |
14f9c5c9 AS |
1583 | else |
1584 | return NULL; | |
1585 | } | |
1586 | ||
4c4b4cd2 PH |
1587 | /* If TYPE is the type of an array-descriptor (fat pointer), the bit |
1588 | position of the field containing the address of the bounds data. */ | |
1589 | ||
14f9c5c9 | 1590 | static int |
d2e4a39e | 1591 | fat_pntr_bounds_bitpos (struct type *type) |
14f9c5c9 AS |
1592 | { |
1593 | return TYPE_FIELD_BITPOS (desc_base_type (type), 1); | |
1594 | } | |
1595 | ||
1596 | /* If TYPE is the type of an array-descriptor (fat pointer), the bit | |
4c4b4cd2 PH |
1597 | size of the field containing the address of the bounds data. */ |
1598 | ||
14f9c5c9 | 1599 | static int |
d2e4a39e | 1600 | fat_pntr_bounds_bitsize (struct type *type) |
14f9c5c9 AS |
1601 | { |
1602 | type = desc_base_type (type); | |
1603 | ||
d2e4a39e | 1604 | if (TYPE_FIELD_BITSIZE (type, 1) > 0) |
14f9c5c9 AS |
1605 | return TYPE_FIELD_BITSIZE (type, 1); |
1606 | else | |
940da03e | 1607 | return 8 * TYPE_LENGTH (ada_check_typedef (type->field (1).type ())); |
14f9c5c9 AS |
1608 | } |
1609 | ||
4c4b4cd2 | 1610 | /* If TYPE is the type of an array descriptor (fat or thin pointer) or a |
556bdfd4 UW |
1611 | pointer to one, the type of its array data (a array-with-no-bounds type); |
1612 | otherwise, NULL. Use ada_type_of_array to get an array type with bounds | |
1613 | data. */ | |
4c4b4cd2 | 1614 | |
d2e4a39e | 1615 | static struct type * |
556bdfd4 | 1616 | desc_data_target_type (struct type *type) |
14f9c5c9 AS |
1617 | { |
1618 | type = desc_base_type (type); | |
1619 | ||
4c4b4cd2 | 1620 | /* NOTE: The following is bogus; see comment in desc_bounds. */ |
14f9c5c9 | 1621 | if (is_thin_pntr (type)) |
940da03e | 1622 | return desc_base_type (thin_descriptor_type (type)->field (1).type ()); |
14f9c5c9 | 1623 | else if (is_thick_pntr (type)) |
556bdfd4 UW |
1624 | { |
1625 | struct type *data_type = lookup_struct_elt_type (type, "P_ARRAY", 1); | |
1626 | ||
1627 | if (data_type | |
78134374 | 1628 | && ada_check_typedef (data_type)->code () == TYPE_CODE_PTR) |
05e522ef | 1629 | return ada_check_typedef (TYPE_TARGET_TYPE (data_type)); |
556bdfd4 UW |
1630 | } |
1631 | ||
1632 | return NULL; | |
14f9c5c9 AS |
1633 | } |
1634 | ||
1635 | /* If ARR is an array descriptor (fat or thin pointer), a pointer to | |
1636 | its array data. */ | |
4c4b4cd2 | 1637 | |
d2e4a39e AS |
1638 | static struct value * |
1639 | desc_data (struct value *arr) | |
14f9c5c9 | 1640 | { |
df407dfe | 1641 | struct type *type = value_type (arr); |
5b4ee69b | 1642 | |
14f9c5c9 AS |
1643 | if (is_thin_pntr (type)) |
1644 | return thin_data_pntr (arr); | |
1645 | else if (is_thick_pntr (type)) | |
d2e4a39e | 1646 | return value_struct_elt (&arr, NULL, "P_ARRAY", NULL, |
dda83cd7 | 1647 | _("Bad GNAT array descriptor")); |
14f9c5c9 AS |
1648 | else |
1649 | return NULL; | |
1650 | } | |
1651 | ||
1652 | ||
1653 | /* If TYPE is the type of an array-descriptor (fat pointer), the bit | |
4c4b4cd2 PH |
1654 | position of the field containing the address of the data. */ |
1655 | ||
14f9c5c9 | 1656 | static int |
d2e4a39e | 1657 | fat_pntr_data_bitpos (struct type *type) |
14f9c5c9 AS |
1658 | { |
1659 | return TYPE_FIELD_BITPOS (desc_base_type (type), 0); | |
1660 | } | |
1661 | ||
1662 | /* If TYPE is the type of an array-descriptor (fat pointer), the bit | |
4c4b4cd2 PH |
1663 | size of the field containing the address of the data. */ |
1664 | ||
14f9c5c9 | 1665 | static int |
d2e4a39e | 1666 | fat_pntr_data_bitsize (struct type *type) |
14f9c5c9 AS |
1667 | { |
1668 | type = desc_base_type (type); | |
1669 | ||
1670 | if (TYPE_FIELD_BITSIZE (type, 0) > 0) | |
1671 | return TYPE_FIELD_BITSIZE (type, 0); | |
d2e4a39e | 1672 | else |
940da03e | 1673 | return TARGET_CHAR_BIT * TYPE_LENGTH (type->field (0).type ()); |
14f9c5c9 AS |
1674 | } |
1675 | ||
4c4b4cd2 | 1676 | /* If BOUNDS is an array-bounds structure (or pointer to one), return |
14f9c5c9 | 1677 | the Ith lower bound stored in it, if WHICH is 0, and the Ith upper |
4c4b4cd2 PH |
1678 | bound, if WHICH is 1. The first bound is I=1. */ |
1679 | ||
d2e4a39e AS |
1680 | static struct value * |
1681 | desc_one_bound (struct value *bounds, int i, int which) | |
14f9c5c9 | 1682 | { |
250106a7 TT |
1683 | char bound_name[20]; |
1684 | xsnprintf (bound_name, sizeof (bound_name), "%cB%d", | |
1685 | which ? 'U' : 'L', i - 1); | |
1686 | return value_struct_elt (&bounds, NULL, bound_name, NULL, | |
dda83cd7 | 1687 | _("Bad GNAT array descriptor bounds")); |
14f9c5c9 AS |
1688 | } |
1689 | ||
1690 | /* If BOUNDS is an array-bounds structure type, return the bit position | |
1691 | of the Ith lower bound stored in it, if WHICH is 0, and the Ith upper | |
4c4b4cd2 PH |
1692 | bound, if WHICH is 1. The first bound is I=1. */ |
1693 | ||
14f9c5c9 | 1694 | static int |
d2e4a39e | 1695 | desc_bound_bitpos (struct type *type, int i, int which) |
14f9c5c9 | 1696 | { |
d2e4a39e | 1697 | return TYPE_FIELD_BITPOS (desc_base_type (type), 2 * i + which - 2); |
14f9c5c9 AS |
1698 | } |
1699 | ||
1700 | /* If BOUNDS is an array-bounds structure type, return the bit field size | |
1701 | of the Ith lower bound stored in it, if WHICH is 0, and the Ith upper | |
4c4b4cd2 PH |
1702 | bound, if WHICH is 1. The first bound is I=1. */ |
1703 | ||
76a01679 | 1704 | static int |
d2e4a39e | 1705 | desc_bound_bitsize (struct type *type, int i, int which) |
14f9c5c9 AS |
1706 | { |
1707 | type = desc_base_type (type); | |
1708 | ||
d2e4a39e AS |
1709 | if (TYPE_FIELD_BITSIZE (type, 2 * i + which - 2) > 0) |
1710 | return TYPE_FIELD_BITSIZE (type, 2 * i + which - 2); | |
1711 | else | |
940da03e | 1712 | return 8 * TYPE_LENGTH (type->field (2 * i + which - 2).type ()); |
14f9c5c9 AS |
1713 | } |
1714 | ||
1715 | /* If TYPE is the type of an array-bounds structure, the type of its | |
4c4b4cd2 PH |
1716 | Ith bound (numbering from 1). Otherwise, NULL. */ |
1717 | ||
d2e4a39e AS |
1718 | static struct type * |
1719 | desc_index_type (struct type *type, int i) | |
14f9c5c9 AS |
1720 | { |
1721 | type = desc_base_type (type); | |
1722 | ||
78134374 | 1723 | if (type->code () == TYPE_CODE_STRUCT) |
250106a7 TT |
1724 | { |
1725 | char bound_name[20]; | |
1726 | xsnprintf (bound_name, sizeof (bound_name), "LB%d", i - 1); | |
1727 | return lookup_struct_elt_type (type, bound_name, 1); | |
1728 | } | |
d2e4a39e | 1729 | else |
14f9c5c9 AS |
1730 | return NULL; |
1731 | } | |
1732 | ||
4c4b4cd2 PH |
1733 | /* The number of index positions in the array-bounds type TYPE. |
1734 | Return 0 if TYPE is NULL. */ | |
1735 | ||
14f9c5c9 | 1736 | static int |
d2e4a39e | 1737 | desc_arity (struct type *type) |
14f9c5c9 AS |
1738 | { |
1739 | type = desc_base_type (type); | |
1740 | ||
1741 | if (type != NULL) | |
1f704f76 | 1742 | return type->num_fields () / 2; |
14f9c5c9 AS |
1743 | return 0; |
1744 | } | |
1745 | ||
4c4b4cd2 PH |
1746 | /* Non-zero iff TYPE is a simple array type (not a pointer to one) or |
1747 | an array descriptor type (representing an unconstrained array | |
1748 | type). */ | |
1749 | ||
76a01679 JB |
1750 | static int |
1751 | ada_is_direct_array_type (struct type *type) | |
4c4b4cd2 PH |
1752 | { |
1753 | if (type == NULL) | |
1754 | return 0; | |
61ee279c | 1755 | type = ada_check_typedef (type); |
78134374 | 1756 | return (type->code () == TYPE_CODE_ARRAY |
dda83cd7 | 1757 | || ada_is_array_descriptor_type (type)); |
4c4b4cd2 PH |
1758 | } |
1759 | ||
52ce6436 | 1760 | /* Non-zero iff TYPE represents any kind of array in Ada, or a pointer |
0963b4bd | 1761 | * to one. */ |
52ce6436 | 1762 | |
2c0b251b | 1763 | static int |
52ce6436 PH |
1764 | ada_is_array_type (struct type *type) |
1765 | { | |
78134374 SM |
1766 | while (type != NULL |
1767 | && (type->code () == TYPE_CODE_PTR | |
1768 | || type->code () == TYPE_CODE_REF)) | |
52ce6436 PH |
1769 | type = TYPE_TARGET_TYPE (type); |
1770 | return ada_is_direct_array_type (type); | |
1771 | } | |
1772 | ||
4c4b4cd2 | 1773 | /* Non-zero iff TYPE is a simple array type or pointer to one. */ |
14f9c5c9 | 1774 | |
14f9c5c9 | 1775 | int |
4c4b4cd2 | 1776 | ada_is_simple_array_type (struct type *type) |
14f9c5c9 AS |
1777 | { |
1778 | if (type == NULL) | |
1779 | return 0; | |
61ee279c | 1780 | type = ada_check_typedef (type); |
78134374 SM |
1781 | return (type->code () == TYPE_CODE_ARRAY |
1782 | || (type->code () == TYPE_CODE_PTR | |
1783 | && (ada_check_typedef (TYPE_TARGET_TYPE (type))->code () | |
1784 | == TYPE_CODE_ARRAY))); | |
14f9c5c9 AS |
1785 | } |
1786 | ||
4c4b4cd2 PH |
1787 | /* Non-zero iff TYPE belongs to a GNAT array descriptor. */ |
1788 | ||
14f9c5c9 | 1789 | int |
4c4b4cd2 | 1790 | ada_is_array_descriptor_type (struct type *type) |
14f9c5c9 | 1791 | { |
556bdfd4 | 1792 | struct type *data_type = desc_data_target_type (type); |
14f9c5c9 AS |
1793 | |
1794 | if (type == NULL) | |
1795 | return 0; | |
61ee279c | 1796 | type = ada_check_typedef (type); |
556bdfd4 | 1797 | return (data_type != NULL |
78134374 | 1798 | && data_type->code () == TYPE_CODE_ARRAY |
556bdfd4 | 1799 | && desc_arity (desc_bounds_type (type)) > 0); |
14f9c5c9 AS |
1800 | } |
1801 | ||
1802 | /* Non-zero iff type is a partially mal-formed GNAT array | |
4c4b4cd2 | 1803 | descriptor. FIXME: This is to compensate for some problems with |
14f9c5c9 | 1804 | debugging output from GNAT. Re-examine periodically to see if it |
4c4b4cd2 PH |
1805 | is still needed. */ |
1806 | ||
14f9c5c9 | 1807 | int |
ebf56fd3 | 1808 | ada_is_bogus_array_descriptor (struct type *type) |
14f9c5c9 | 1809 | { |
d2e4a39e | 1810 | return |
14f9c5c9 | 1811 | type != NULL |
78134374 | 1812 | && type->code () == TYPE_CODE_STRUCT |
14f9c5c9 | 1813 | && (lookup_struct_elt_type (type, "P_BOUNDS", 1) != NULL |
dda83cd7 | 1814 | || lookup_struct_elt_type (type, "P_ARRAY", 1) != NULL) |
4c4b4cd2 | 1815 | && !ada_is_array_descriptor_type (type); |
14f9c5c9 AS |
1816 | } |
1817 | ||
1818 | ||
4c4b4cd2 | 1819 | /* If ARR has a record type in the form of a standard GNAT array descriptor, |
14f9c5c9 | 1820 | (fat pointer) returns the type of the array data described---specifically, |
4c4b4cd2 | 1821 | a pointer-to-array type. If BOUNDS is non-zero, the bounds data are filled |
14f9c5c9 | 1822 | in from the descriptor; otherwise, they are left unspecified. If |
4c4b4cd2 PH |
1823 | the ARR denotes a null array descriptor and BOUNDS is non-zero, |
1824 | returns NULL. The result is simply the type of ARR if ARR is not | |
14f9c5c9 | 1825 | a descriptor. */ |
de93309a SM |
1826 | |
1827 | static struct type * | |
d2e4a39e | 1828 | ada_type_of_array (struct value *arr, int bounds) |
14f9c5c9 | 1829 | { |
ad82864c JB |
1830 | if (ada_is_constrained_packed_array_type (value_type (arr))) |
1831 | return decode_constrained_packed_array_type (value_type (arr)); | |
14f9c5c9 | 1832 | |
df407dfe AC |
1833 | if (!ada_is_array_descriptor_type (value_type (arr))) |
1834 | return value_type (arr); | |
d2e4a39e AS |
1835 | |
1836 | if (!bounds) | |
ad82864c JB |
1837 | { |
1838 | struct type *array_type = | |
1839 | ada_check_typedef (desc_data_target_type (value_type (arr))); | |
1840 | ||
1841 | if (ada_is_unconstrained_packed_array_type (value_type (arr))) | |
1842 | TYPE_FIELD_BITSIZE (array_type, 0) = | |
1843 | decode_packed_array_bitsize (value_type (arr)); | |
1844 | ||
1845 | return array_type; | |
1846 | } | |
14f9c5c9 AS |
1847 | else |
1848 | { | |
d2e4a39e | 1849 | struct type *elt_type; |
14f9c5c9 | 1850 | int arity; |
d2e4a39e | 1851 | struct value *descriptor; |
14f9c5c9 | 1852 | |
df407dfe AC |
1853 | elt_type = ada_array_element_type (value_type (arr), -1); |
1854 | arity = ada_array_arity (value_type (arr)); | |
14f9c5c9 | 1855 | |
d2e4a39e | 1856 | if (elt_type == NULL || arity == 0) |
dda83cd7 | 1857 | return ada_check_typedef (value_type (arr)); |
14f9c5c9 AS |
1858 | |
1859 | descriptor = desc_bounds (arr); | |
d2e4a39e | 1860 | if (value_as_long (descriptor) == 0) |
dda83cd7 | 1861 | return NULL; |
d2e4a39e | 1862 | while (arity > 0) |
dda83cd7 SM |
1863 | { |
1864 | struct type *range_type = alloc_type_copy (value_type (arr)); | |
1865 | struct type *array_type = alloc_type_copy (value_type (arr)); | |
1866 | struct value *low = desc_one_bound (descriptor, arity, 0); | |
1867 | struct value *high = desc_one_bound (descriptor, arity, 1); | |
1868 | ||
1869 | arity -= 1; | |
1870 | create_static_range_type (range_type, value_type (low), | |
0c9c3474 SA |
1871 | longest_to_int (value_as_long (low)), |
1872 | longest_to_int (value_as_long (high))); | |
dda83cd7 | 1873 | elt_type = create_array_type (array_type, elt_type, range_type); |
ad82864c JB |
1874 | |
1875 | if (ada_is_unconstrained_packed_array_type (value_type (arr))) | |
e67ad678 JB |
1876 | { |
1877 | /* We need to store the element packed bitsize, as well as | |
dda83cd7 | 1878 | recompute the array size, because it was previously |
e67ad678 JB |
1879 | computed based on the unpacked element size. */ |
1880 | LONGEST lo = value_as_long (low); | |
1881 | LONGEST hi = value_as_long (high); | |
1882 | ||
1883 | TYPE_FIELD_BITSIZE (elt_type, 0) = | |
1884 | decode_packed_array_bitsize (value_type (arr)); | |
1885 | /* If the array has no element, then the size is already | |
dda83cd7 | 1886 | zero, and does not need to be recomputed. */ |
e67ad678 JB |
1887 | if (lo < hi) |
1888 | { | |
1889 | int array_bitsize = | |
dda83cd7 | 1890 | (hi - lo + 1) * TYPE_FIELD_BITSIZE (elt_type, 0); |
e67ad678 JB |
1891 | |
1892 | TYPE_LENGTH (array_type) = (array_bitsize + 7) / 8; | |
1893 | } | |
1894 | } | |
dda83cd7 | 1895 | } |
14f9c5c9 AS |
1896 | |
1897 | return lookup_pointer_type (elt_type); | |
1898 | } | |
1899 | } | |
1900 | ||
1901 | /* If ARR does not represent an array, returns ARR unchanged. | |
4c4b4cd2 PH |
1902 | Otherwise, returns either a standard GDB array with bounds set |
1903 | appropriately or, if ARR is a non-null fat pointer, a pointer to a standard | |
1904 | GDB array. Returns NULL if ARR is a null fat pointer. */ | |
1905 | ||
d2e4a39e AS |
1906 | struct value * |
1907 | ada_coerce_to_simple_array_ptr (struct value *arr) | |
14f9c5c9 | 1908 | { |
df407dfe | 1909 | if (ada_is_array_descriptor_type (value_type (arr))) |
14f9c5c9 | 1910 | { |
d2e4a39e | 1911 | struct type *arrType = ada_type_of_array (arr, 1); |
5b4ee69b | 1912 | |
14f9c5c9 | 1913 | if (arrType == NULL) |
dda83cd7 | 1914 | return NULL; |
14f9c5c9 AS |
1915 | return value_cast (arrType, value_copy (desc_data (arr))); |
1916 | } | |
ad82864c JB |
1917 | else if (ada_is_constrained_packed_array_type (value_type (arr))) |
1918 | return decode_constrained_packed_array (arr); | |
14f9c5c9 AS |
1919 | else |
1920 | return arr; | |
1921 | } | |
1922 | ||
1923 | /* If ARR does not represent an array, returns ARR unchanged. | |
1924 | Otherwise, returns a standard GDB array describing ARR (which may | |
4c4b4cd2 PH |
1925 | be ARR itself if it already is in the proper form). */ |
1926 | ||
720d1a40 | 1927 | struct value * |
d2e4a39e | 1928 | ada_coerce_to_simple_array (struct value *arr) |
14f9c5c9 | 1929 | { |
df407dfe | 1930 | if (ada_is_array_descriptor_type (value_type (arr))) |
14f9c5c9 | 1931 | { |
d2e4a39e | 1932 | struct value *arrVal = ada_coerce_to_simple_array_ptr (arr); |
5b4ee69b | 1933 | |
14f9c5c9 | 1934 | if (arrVal == NULL) |
dda83cd7 | 1935 | error (_("Bounds unavailable for null array pointer.")); |
c1b5a1a6 | 1936 | ada_ensure_varsize_limit (TYPE_TARGET_TYPE (value_type (arrVal))); |
14f9c5c9 AS |
1937 | return value_ind (arrVal); |
1938 | } | |
ad82864c JB |
1939 | else if (ada_is_constrained_packed_array_type (value_type (arr))) |
1940 | return decode_constrained_packed_array (arr); | |
d2e4a39e | 1941 | else |
14f9c5c9 AS |
1942 | return arr; |
1943 | } | |
1944 | ||
1945 | /* If TYPE represents a GNAT array type, return it translated to an | |
1946 | ordinary GDB array type (possibly with BITSIZE fields indicating | |
4c4b4cd2 PH |
1947 | packing). For other types, is the identity. */ |
1948 | ||
d2e4a39e AS |
1949 | struct type * |
1950 | ada_coerce_to_simple_array_type (struct type *type) | |
14f9c5c9 | 1951 | { |
ad82864c JB |
1952 | if (ada_is_constrained_packed_array_type (type)) |
1953 | return decode_constrained_packed_array_type (type); | |
17280b9f UW |
1954 | |
1955 | if (ada_is_array_descriptor_type (type)) | |
556bdfd4 | 1956 | return ada_check_typedef (desc_data_target_type (type)); |
17280b9f UW |
1957 | |
1958 | return type; | |
14f9c5c9 AS |
1959 | } |
1960 | ||
4c4b4cd2 PH |
1961 | /* Non-zero iff TYPE represents a standard GNAT packed-array type. */ |
1962 | ||
ad82864c | 1963 | static int |
57567375 | 1964 | ada_is_gnat_encoded_packed_array_type (struct type *type) |
14f9c5c9 AS |
1965 | { |
1966 | if (type == NULL) | |
1967 | return 0; | |
4c4b4cd2 | 1968 | type = desc_base_type (type); |
61ee279c | 1969 | type = ada_check_typedef (type); |
d2e4a39e | 1970 | return |
14f9c5c9 AS |
1971 | ada_type_name (type) != NULL |
1972 | && strstr (ada_type_name (type), "___XP") != NULL; | |
1973 | } | |
1974 | ||
ad82864c JB |
1975 | /* Non-zero iff TYPE represents a standard GNAT constrained |
1976 | packed-array type. */ | |
1977 | ||
1978 | int | |
1979 | ada_is_constrained_packed_array_type (struct type *type) | |
1980 | { | |
57567375 | 1981 | return ada_is_gnat_encoded_packed_array_type (type) |
ad82864c JB |
1982 | && !ada_is_array_descriptor_type (type); |
1983 | } | |
1984 | ||
1985 | /* Non-zero iff TYPE represents an array descriptor for a | |
1986 | unconstrained packed-array type. */ | |
1987 | ||
1988 | static int | |
1989 | ada_is_unconstrained_packed_array_type (struct type *type) | |
1990 | { | |
57567375 TT |
1991 | if (!ada_is_array_descriptor_type (type)) |
1992 | return 0; | |
1993 | ||
1994 | if (ada_is_gnat_encoded_packed_array_type (type)) | |
1995 | return 1; | |
1996 | ||
1997 | /* If we saw GNAT encodings, then the above code is sufficient. | |
1998 | However, with minimal encodings, we will just have a thick | |
1999 | pointer instead. */ | |
2000 | if (is_thick_pntr (type)) | |
2001 | { | |
2002 | type = desc_base_type (type); | |
2003 | /* The structure's first field is a pointer to an array, so this | |
2004 | fetches the array type. */ | |
2005 | type = TYPE_TARGET_TYPE (type->field (0).type ()); | |
2006 | /* Now we can see if the array elements are packed. */ | |
2007 | return TYPE_FIELD_BITSIZE (type, 0) > 0; | |
2008 | } | |
2009 | ||
2010 | return 0; | |
ad82864c JB |
2011 | } |
2012 | ||
c9a28cbe TT |
2013 | /* Return true if TYPE is a (Gnat-encoded) constrained packed array |
2014 | type, or if it is an ordinary (non-Gnat-encoded) packed array. */ | |
2015 | ||
2016 | static bool | |
2017 | ada_is_any_packed_array_type (struct type *type) | |
2018 | { | |
2019 | return (ada_is_constrained_packed_array_type (type) | |
2020 | || (type->code () == TYPE_CODE_ARRAY | |
2021 | && TYPE_FIELD_BITSIZE (type, 0) % 8 != 0)); | |
2022 | } | |
2023 | ||
ad82864c JB |
2024 | /* Given that TYPE encodes a packed array type (constrained or unconstrained), |
2025 | return the size of its elements in bits. */ | |
2026 | ||
2027 | static long | |
2028 | decode_packed_array_bitsize (struct type *type) | |
2029 | { | |
0d5cff50 DE |
2030 | const char *raw_name; |
2031 | const char *tail; | |
ad82864c JB |
2032 | long bits; |
2033 | ||
720d1a40 JB |
2034 | /* Access to arrays implemented as fat pointers are encoded as a typedef |
2035 | of the fat pointer type. We need the name of the fat pointer type | |
2036 | to do the decoding, so strip the typedef layer. */ | |
78134374 | 2037 | if (type->code () == TYPE_CODE_TYPEDEF) |
720d1a40 JB |
2038 | type = ada_typedef_target_type (type); |
2039 | ||
2040 | raw_name = ada_type_name (ada_check_typedef (type)); | |
ad82864c JB |
2041 | if (!raw_name) |
2042 | raw_name = ada_type_name (desc_base_type (type)); | |
2043 | ||
2044 | if (!raw_name) | |
2045 | return 0; | |
2046 | ||
2047 | tail = strstr (raw_name, "___XP"); | |
57567375 TT |
2048 | if (tail == nullptr) |
2049 | { | |
2050 | gdb_assert (is_thick_pntr (type)); | |
2051 | /* The structure's first field is a pointer to an array, so this | |
2052 | fetches the array type. */ | |
2053 | type = TYPE_TARGET_TYPE (type->field (0).type ()); | |
2054 | /* Now we can see if the array elements are packed. */ | |
2055 | return TYPE_FIELD_BITSIZE (type, 0); | |
2056 | } | |
ad82864c JB |
2057 | |
2058 | if (sscanf (tail + sizeof ("___XP") - 1, "%ld", &bits) != 1) | |
2059 | { | |
2060 | lim_warning | |
2061 | (_("could not understand bit size information on packed array")); | |
2062 | return 0; | |
2063 | } | |
2064 | ||
2065 | return bits; | |
2066 | } | |
2067 | ||
14f9c5c9 AS |
2068 | /* Given that TYPE is a standard GDB array type with all bounds filled |
2069 | in, and that the element size of its ultimate scalar constituents | |
2070 | (that is, either its elements, or, if it is an array of arrays, its | |
2071 | elements' elements, etc.) is *ELT_BITS, return an identical type, | |
2072 | but with the bit sizes of its elements (and those of any | |
2073 | constituent arrays) recorded in the BITSIZE components of its | |
4c4b4cd2 | 2074 | TYPE_FIELD_BITSIZE values, and with *ELT_BITS set to its total size |
4a46959e JB |
2075 | in bits. |
2076 | ||
2077 | Note that, for arrays whose index type has an XA encoding where | |
2078 | a bound references a record discriminant, getting that discriminant, | |
2079 | and therefore the actual value of that bound, is not possible | |
2080 | because none of the given parameters gives us access to the record. | |
2081 | This function assumes that it is OK in the context where it is being | |
2082 | used to return an array whose bounds are still dynamic and where | |
2083 | the length is arbitrary. */ | |
4c4b4cd2 | 2084 | |
d2e4a39e | 2085 | static struct type * |
ad82864c | 2086 | constrained_packed_array_type (struct type *type, long *elt_bits) |
14f9c5c9 | 2087 | { |
d2e4a39e AS |
2088 | struct type *new_elt_type; |
2089 | struct type *new_type; | |
99b1c762 JB |
2090 | struct type *index_type_desc; |
2091 | struct type *index_type; | |
14f9c5c9 AS |
2092 | LONGEST low_bound, high_bound; |
2093 | ||
61ee279c | 2094 | type = ada_check_typedef (type); |
78134374 | 2095 | if (type->code () != TYPE_CODE_ARRAY) |
14f9c5c9 AS |
2096 | return type; |
2097 | ||
99b1c762 JB |
2098 | index_type_desc = ada_find_parallel_type (type, "___XA"); |
2099 | if (index_type_desc) | |
940da03e | 2100 | index_type = to_fixed_range_type (index_type_desc->field (0).type (), |
99b1c762 JB |
2101 | NULL); |
2102 | else | |
3d967001 | 2103 | index_type = type->index_type (); |
99b1c762 | 2104 | |
e9bb382b | 2105 | new_type = alloc_type_copy (type); |
ad82864c JB |
2106 | new_elt_type = |
2107 | constrained_packed_array_type (ada_check_typedef (TYPE_TARGET_TYPE (type)), | |
2108 | elt_bits); | |
99b1c762 | 2109 | create_array_type (new_type, new_elt_type, index_type); |
14f9c5c9 | 2110 | TYPE_FIELD_BITSIZE (new_type, 0) = *elt_bits; |
d0e39ea2 | 2111 | new_type->set_name (ada_type_name (type)); |
14f9c5c9 | 2112 | |
78134374 | 2113 | if ((check_typedef (index_type)->code () == TYPE_CODE_RANGE |
4a46959e JB |
2114 | && is_dynamic_type (check_typedef (index_type))) |
2115 | || get_discrete_bounds (index_type, &low_bound, &high_bound) < 0) | |
14f9c5c9 AS |
2116 | low_bound = high_bound = 0; |
2117 | if (high_bound < low_bound) | |
2118 | *elt_bits = TYPE_LENGTH (new_type) = 0; | |
d2e4a39e | 2119 | else |
14f9c5c9 AS |
2120 | { |
2121 | *elt_bits *= (high_bound - low_bound + 1); | |
d2e4a39e | 2122 | TYPE_LENGTH (new_type) = |
dda83cd7 | 2123 | (*elt_bits + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT; |
14f9c5c9 AS |
2124 | } |
2125 | ||
9cdd0d12 | 2126 | new_type->set_is_fixed_instance (true); |
14f9c5c9 AS |
2127 | return new_type; |
2128 | } | |
2129 | ||
ad82864c JB |
2130 | /* The array type encoded by TYPE, where |
2131 | ada_is_constrained_packed_array_type (TYPE). */ | |
4c4b4cd2 | 2132 | |
d2e4a39e | 2133 | static struct type * |
ad82864c | 2134 | decode_constrained_packed_array_type (struct type *type) |
d2e4a39e | 2135 | { |
0d5cff50 | 2136 | const char *raw_name = ada_type_name (ada_check_typedef (type)); |
727e3d2e | 2137 | char *name; |
0d5cff50 | 2138 | const char *tail; |
d2e4a39e | 2139 | struct type *shadow_type; |
14f9c5c9 | 2140 | long bits; |
14f9c5c9 | 2141 | |
727e3d2e JB |
2142 | if (!raw_name) |
2143 | raw_name = ada_type_name (desc_base_type (type)); | |
2144 | ||
2145 | if (!raw_name) | |
2146 | return NULL; | |
2147 | ||
2148 | name = (char *) alloca (strlen (raw_name) + 1); | |
2149 | tail = strstr (raw_name, "___XP"); | |
4c4b4cd2 PH |
2150 | type = desc_base_type (type); |
2151 | ||
14f9c5c9 AS |
2152 | memcpy (name, raw_name, tail - raw_name); |
2153 | name[tail - raw_name] = '\000'; | |
2154 | ||
b4ba55a1 JB |
2155 | shadow_type = ada_find_parallel_type_with_name (type, name); |
2156 | ||
2157 | if (shadow_type == NULL) | |
14f9c5c9 | 2158 | { |
323e0a4a | 2159 | lim_warning (_("could not find bounds information on packed array")); |
14f9c5c9 AS |
2160 | return NULL; |
2161 | } | |
f168693b | 2162 | shadow_type = check_typedef (shadow_type); |
14f9c5c9 | 2163 | |
78134374 | 2164 | if (shadow_type->code () != TYPE_CODE_ARRAY) |
14f9c5c9 | 2165 | { |
0963b4bd MS |
2166 | lim_warning (_("could not understand bounds " |
2167 | "information on packed array")); | |
14f9c5c9 AS |
2168 | return NULL; |
2169 | } | |
d2e4a39e | 2170 | |
ad82864c JB |
2171 | bits = decode_packed_array_bitsize (type); |
2172 | return constrained_packed_array_type (shadow_type, &bits); | |
14f9c5c9 AS |
2173 | } |
2174 | ||
a7400e44 TT |
2175 | /* Helper function for decode_constrained_packed_array. Set the field |
2176 | bitsize on a series of packed arrays. Returns the number of | |
2177 | elements in TYPE. */ | |
2178 | ||
2179 | static LONGEST | |
2180 | recursively_update_array_bitsize (struct type *type) | |
2181 | { | |
2182 | gdb_assert (type->code () == TYPE_CODE_ARRAY); | |
2183 | ||
2184 | LONGEST low, high; | |
2185 | if (get_discrete_bounds (type->index_type (), &low, &high) < 0 | |
2186 | || low > high) | |
2187 | return 0; | |
2188 | LONGEST our_len = high - low + 1; | |
2189 | ||
2190 | struct type *elt_type = TYPE_TARGET_TYPE (type); | |
2191 | if (elt_type->code () == TYPE_CODE_ARRAY) | |
2192 | { | |
2193 | LONGEST elt_len = recursively_update_array_bitsize (elt_type); | |
2194 | LONGEST elt_bitsize = elt_len * TYPE_FIELD_BITSIZE (elt_type, 0); | |
2195 | TYPE_FIELD_BITSIZE (type, 0) = elt_bitsize; | |
2196 | ||
2197 | TYPE_LENGTH (type) = ((our_len * elt_bitsize + HOST_CHAR_BIT - 1) | |
2198 | / HOST_CHAR_BIT); | |
2199 | } | |
2200 | ||
2201 | return our_len; | |
2202 | } | |
2203 | ||
ad82864c JB |
2204 | /* Given that ARR is a struct value *indicating a GNAT constrained packed |
2205 | array, returns a simple array that denotes that array. Its type is a | |
14f9c5c9 AS |
2206 | standard GDB array type except that the BITSIZEs of the array |
2207 | target types are set to the number of bits in each element, and the | |
4c4b4cd2 | 2208 | type length is set appropriately. */ |
14f9c5c9 | 2209 | |
d2e4a39e | 2210 | static struct value * |
ad82864c | 2211 | decode_constrained_packed_array (struct value *arr) |
14f9c5c9 | 2212 | { |
4c4b4cd2 | 2213 | struct type *type; |
14f9c5c9 | 2214 | |
11aa919a PMR |
2215 | /* If our value is a pointer, then dereference it. Likewise if |
2216 | the value is a reference. Make sure that this operation does not | |
2217 | cause the target type to be fixed, as this would indirectly cause | |
2218 | this array to be decoded. The rest of the routine assumes that | |
2219 | the array hasn't been decoded yet, so we use the basic "coerce_ref" | |
2220 | and "value_ind" routines to perform the dereferencing, as opposed | |
2221 | to using "ada_coerce_ref" or "ada_value_ind". */ | |
2222 | arr = coerce_ref (arr); | |
78134374 | 2223 | if (ada_check_typedef (value_type (arr))->code () == TYPE_CODE_PTR) |
284614f0 | 2224 | arr = value_ind (arr); |
4c4b4cd2 | 2225 | |
ad82864c | 2226 | type = decode_constrained_packed_array_type (value_type (arr)); |
14f9c5c9 AS |
2227 | if (type == NULL) |
2228 | { | |
323e0a4a | 2229 | error (_("can't unpack array")); |
14f9c5c9 AS |
2230 | return NULL; |
2231 | } | |
61ee279c | 2232 | |
a7400e44 TT |
2233 | /* Decoding the packed array type could not correctly set the field |
2234 | bitsizes for any dimension except the innermost, because the | |
2235 | bounds may be variable and were not passed to that function. So, | |
2236 | we further resolve the array bounds here and then update the | |
2237 | sizes. */ | |
2238 | const gdb_byte *valaddr = value_contents_for_printing (arr); | |
2239 | CORE_ADDR address = value_address (arr); | |
2240 | gdb::array_view<const gdb_byte> view | |
2241 | = gdb::make_array_view (valaddr, TYPE_LENGTH (type)); | |
2242 | type = resolve_dynamic_type (type, view, address); | |
2243 | recursively_update_array_bitsize (type); | |
2244 | ||
d5a22e77 | 2245 | if (type_byte_order (value_type (arr)) == BFD_ENDIAN_BIG |
32c9a795 | 2246 | && ada_is_modular_type (value_type (arr))) |
61ee279c PH |
2247 | { |
2248 | /* This is a (right-justified) modular type representing a packed | |
2249 | array with no wrapper. In order to interpret the value through | |
2250 | the (left-justified) packed array type we just built, we must | |
2251 | first left-justify it. */ | |
2252 | int bit_size, bit_pos; | |
2253 | ULONGEST mod; | |
2254 | ||
df407dfe | 2255 | mod = ada_modulus (value_type (arr)) - 1; |
61ee279c PH |
2256 | bit_size = 0; |
2257 | while (mod > 0) | |
2258 | { | |
2259 | bit_size += 1; | |
2260 | mod >>= 1; | |
2261 | } | |
df407dfe | 2262 | bit_pos = HOST_CHAR_BIT * TYPE_LENGTH (value_type (arr)) - bit_size; |
61ee279c PH |
2263 | arr = ada_value_primitive_packed_val (arr, NULL, |
2264 | bit_pos / HOST_CHAR_BIT, | |
2265 | bit_pos % HOST_CHAR_BIT, | |
2266 | bit_size, | |
2267 | type); | |
2268 | } | |
2269 | ||
4c4b4cd2 | 2270 | return coerce_unspec_val_to_type (arr, type); |
14f9c5c9 AS |
2271 | } |
2272 | ||
2273 | ||
2274 | /* The value of the element of packed array ARR at the ARITY indices | |
4c4b4cd2 | 2275 | given in IND. ARR must be a simple array. */ |
14f9c5c9 | 2276 | |
d2e4a39e AS |
2277 | static struct value * |
2278 | value_subscript_packed (struct value *arr, int arity, struct value **ind) | |
14f9c5c9 AS |
2279 | { |
2280 | int i; | |
2281 | int bits, elt_off, bit_off; | |
2282 | long elt_total_bit_offset; | |
d2e4a39e AS |
2283 | struct type *elt_type; |
2284 | struct value *v; | |
14f9c5c9 AS |
2285 | |
2286 | bits = 0; | |
2287 | elt_total_bit_offset = 0; | |
df407dfe | 2288 | elt_type = ada_check_typedef (value_type (arr)); |
d2e4a39e | 2289 | for (i = 0; i < arity; i += 1) |
14f9c5c9 | 2290 | { |
78134374 | 2291 | if (elt_type->code () != TYPE_CODE_ARRAY |
dda83cd7 SM |
2292 | || TYPE_FIELD_BITSIZE (elt_type, 0) == 0) |
2293 | error | |
2294 | (_("attempt to do packed indexing of " | |
0963b4bd | 2295 | "something other than a packed array")); |
14f9c5c9 | 2296 | else |
dda83cd7 SM |
2297 | { |
2298 | struct type *range_type = elt_type->index_type (); | |
2299 | LONGEST lowerbound, upperbound; | |
2300 | LONGEST idx; | |
2301 | ||
2302 | if (get_discrete_bounds (range_type, &lowerbound, &upperbound) < 0) | |
2303 | { | |
2304 | lim_warning (_("don't know bounds of array")); | |
2305 | lowerbound = upperbound = 0; | |
2306 | } | |
2307 | ||
2308 | idx = pos_atr (ind[i]); | |
2309 | if (idx < lowerbound || idx > upperbound) | |
2310 | lim_warning (_("packed array index %ld out of bounds"), | |
0963b4bd | 2311 | (long) idx); |
dda83cd7 SM |
2312 | bits = TYPE_FIELD_BITSIZE (elt_type, 0); |
2313 | elt_total_bit_offset += (idx - lowerbound) * bits; | |
2314 | elt_type = ada_check_typedef (TYPE_TARGET_TYPE (elt_type)); | |
2315 | } | |
14f9c5c9 AS |
2316 | } |
2317 | elt_off = elt_total_bit_offset / HOST_CHAR_BIT; | |
2318 | bit_off = elt_total_bit_offset % HOST_CHAR_BIT; | |
d2e4a39e AS |
2319 | |
2320 | v = ada_value_primitive_packed_val (arr, NULL, elt_off, bit_off, | |
dda83cd7 | 2321 | bits, elt_type); |
14f9c5c9 AS |
2322 | return v; |
2323 | } | |
2324 | ||
4c4b4cd2 | 2325 | /* Non-zero iff TYPE includes negative integer values. */ |
14f9c5c9 AS |
2326 | |
2327 | static int | |
d2e4a39e | 2328 | has_negatives (struct type *type) |
14f9c5c9 | 2329 | { |
78134374 | 2330 | switch (type->code ()) |
d2e4a39e AS |
2331 | { |
2332 | default: | |
2333 | return 0; | |
2334 | case TYPE_CODE_INT: | |
c6d940a9 | 2335 | return !type->is_unsigned (); |
d2e4a39e | 2336 | case TYPE_CODE_RANGE: |
5537ddd0 | 2337 | return type->bounds ()->low.const_val () - type->bounds ()->bias < 0; |
d2e4a39e | 2338 | } |
14f9c5c9 | 2339 | } |
d2e4a39e | 2340 | |
f93fca70 | 2341 | /* With SRC being a buffer containing BIT_SIZE bits of data at BIT_OFFSET, |
5b639dea | 2342 | unpack that data into UNPACKED. UNPACKED_LEN is the size in bytes of |
f93fca70 | 2343 | the unpacked buffer. |
14f9c5c9 | 2344 | |
5b639dea JB |
2345 | The size of the unpacked buffer (UNPACKED_LEN) is expected to be large |
2346 | enough to contain at least BIT_OFFSET bits. If not, an error is raised. | |
2347 | ||
f93fca70 JB |
2348 | IS_BIG_ENDIAN is nonzero if the data is stored in big endian mode, |
2349 | zero otherwise. | |
14f9c5c9 | 2350 | |
f93fca70 | 2351 | IS_SIGNED_TYPE is nonzero if the data corresponds to a signed type. |
a1c95e6b | 2352 | |
f93fca70 JB |
2353 | IS_SCALAR is nonzero if the data corresponds to a signed type. */ |
2354 | ||
2355 | static void | |
2356 | ada_unpack_from_contents (const gdb_byte *src, int bit_offset, int bit_size, | |
2357 | gdb_byte *unpacked, int unpacked_len, | |
2358 | int is_big_endian, int is_signed_type, | |
2359 | int is_scalar) | |
2360 | { | |
a1c95e6b JB |
2361 | int src_len = (bit_size + bit_offset + HOST_CHAR_BIT - 1) / 8; |
2362 | int src_idx; /* Index into the source area */ | |
2363 | int src_bytes_left; /* Number of source bytes left to process. */ | |
2364 | int srcBitsLeft; /* Number of source bits left to move */ | |
2365 | int unusedLS; /* Number of bits in next significant | |
dda83cd7 | 2366 | byte of source that are unused */ |
a1c95e6b | 2367 | |
a1c95e6b JB |
2368 | int unpacked_idx; /* Index into the unpacked buffer */ |
2369 | int unpacked_bytes_left; /* Number of bytes left to set in unpacked. */ | |
2370 | ||
4c4b4cd2 | 2371 | unsigned long accum; /* Staging area for bits being transferred */ |
a1c95e6b | 2372 | int accumSize; /* Number of meaningful bits in accum */ |
14f9c5c9 | 2373 | unsigned char sign; |
a1c95e6b | 2374 | |
4c4b4cd2 PH |
2375 | /* Transmit bytes from least to most significant; delta is the direction |
2376 | the indices move. */ | |
f93fca70 | 2377 | int delta = is_big_endian ? -1 : 1; |
14f9c5c9 | 2378 | |
5b639dea JB |
2379 | /* Make sure that unpacked is large enough to receive the BIT_SIZE |
2380 | bits from SRC. .*/ | |
2381 | if ((bit_size + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT > unpacked_len) | |
2382 | error (_("Cannot unpack %d bits into buffer of %d bytes"), | |
2383 | bit_size, unpacked_len); | |
2384 | ||
14f9c5c9 | 2385 | srcBitsLeft = bit_size; |
086ca51f | 2386 | src_bytes_left = src_len; |
f93fca70 | 2387 | unpacked_bytes_left = unpacked_len; |
14f9c5c9 | 2388 | sign = 0; |
f93fca70 JB |
2389 | |
2390 | if (is_big_endian) | |
14f9c5c9 | 2391 | { |
086ca51f | 2392 | src_idx = src_len - 1; |
f93fca70 JB |
2393 | if (is_signed_type |
2394 | && ((src[0] << bit_offset) & (1 << (HOST_CHAR_BIT - 1)))) | |
dda83cd7 | 2395 | sign = ~0; |
d2e4a39e AS |
2396 | |
2397 | unusedLS = | |
dda83cd7 SM |
2398 | (HOST_CHAR_BIT - (bit_size + bit_offset) % HOST_CHAR_BIT) |
2399 | % HOST_CHAR_BIT; | |
14f9c5c9 | 2400 | |
f93fca70 JB |
2401 | if (is_scalar) |
2402 | { | |
dda83cd7 SM |
2403 | accumSize = 0; |
2404 | unpacked_idx = unpacked_len - 1; | |
f93fca70 JB |
2405 | } |
2406 | else | |
2407 | { | |
dda83cd7 SM |
2408 | /* Non-scalar values must be aligned at a byte boundary... */ |
2409 | accumSize = | |
2410 | (HOST_CHAR_BIT - bit_size % HOST_CHAR_BIT) % HOST_CHAR_BIT; | |
2411 | /* ... And are placed at the beginning (most-significant) bytes | |
2412 | of the target. */ | |
2413 | unpacked_idx = (bit_size + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT - 1; | |
2414 | unpacked_bytes_left = unpacked_idx + 1; | |
f93fca70 | 2415 | } |
14f9c5c9 | 2416 | } |
d2e4a39e | 2417 | else |
14f9c5c9 AS |
2418 | { |
2419 | int sign_bit_offset = (bit_size + bit_offset - 1) % 8; | |
2420 | ||
086ca51f | 2421 | src_idx = unpacked_idx = 0; |
14f9c5c9 AS |
2422 | unusedLS = bit_offset; |
2423 | accumSize = 0; | |
2424 | ||
f93fca70 | 2425 | if (is_signed_type && (src[src_len - 1] & (1 << sign_bit_offset))) |
dda83cd7 | 2426 | sign = ~0; |
14f9c5c9 | 2427 | } |
d2e4a39e | 2428 | |
14f9c5c9 | 2429 | accum = 0; |
086ca51f | 2430 | while (src_bytes_left > 0) |
14f9c5c9 AS |
2431 | { |
2432 | /* Mask for removing bits of the next source byte that are not | |
dda83cd7 | 2433 | part of the value. */ |
d2e4a39e | 2434 | unsigned int unusedMSMask = |
dda83cd7 SM |
2435 | (1 << (srcBitsLeft >= HOST_CHAR_BIT ? HOST_CHAR_BIT : srcBitsLeft)) - |
2436 | 1; | |
4c4b4cd2 | 2437 | /* Sign-extend bits for this byte. */ |
14f9c5c9 | 2438 | unsigned int signMask = sign & ~unusedMSMask; |
5b4ee69b | 2439 | |
d2e4a39e | 2440 | accum |= |
dda83cd7 | 2441 | (((src[src_idx] >> unusedLS) & unusedMSMask) | signMask) << accumSize; |
14f9c5c9 | 2442 | accumSize += HOST_CHAR_BIT - unusedLS; |
d2e4a39e | 2443 | if (accumSize >= HOST_CHAR_BIT) |
dda83cd7 SM |
2444 | { |
2445 | unpacked[unpacked_idx] = accum & ~(~0UL << HOST_CHAR_BIT); | |
2446 | accumSize -= HOST_CHAR_BIT; | |
2447 | accum >>= HOST_CHAR_BIT; | |
2448 | unpacked_bytes_left -= 1; | |
2449 | unpacked_idx += delta; | |
2450 | } | |
14f9c5c9 AS |
2451 | srcBitsLeft -= HOST_CHAR_BIT - unusedLS; |
2452 | unusedLS = 0; | |
086ca51f JB |
2453 | src_bytes_left -= 1; |
2454 | src_idx += delta; | |
14f9c5c9 | 2455 | } |
086ca51f | 2456 | while (unpacked_bytes_left > 0) |
14f9c5c9 AS |
2457 | { |
2458 | accum |= sign << accumSize; | |
db297a65 | 2459 | unpacked[unpacked_idx] = accum & ~(~0UL << HOST_CHAR_BIT); |
14f9c5c9 | 2460 | accumSize -= HOST_CHAR_BIT; |
9cd4d857 JB |
2461 | if (accumSize < 0) |
2462 | accumSize = 0; | |
14f9c5c9 | 2463 | accum >>= HOST_CHAR_BIT; |
086ca51f JB |
2464 | unpacked_bytes_left -= 1; |
2465 | unpacked_idx += delta; | |
14f9c5c9 | 2466 | } |
f93fca70 JB |
2467 | } |
2468 | ||
2469 | /* Create a new value of type TYPE from the contents of OBJ starting | |
2470 | at byte OFFSET, and bit offset BIT_OFFSET within that byte, | |
2471 | proceeding for BIT_SIZE bits. If OBJ is an lval in memory, then | |
2472 | assigning through the result will set the field fetched from. | |
2473 | VALADDR is ignored unless OBJ is NULL, in which case, | |
2474 | VALADDR+OFFSET must address the start of storage containing the | |
2475 | packed value. The value returned in this case is never an lval. | |
2476 | Assumes 0 <= BIT_OFFSET < HOST_CHAR_BIT. */ | |
2477 | ||
2478 | struct value * | |
2479 | ada_value_primitive_packed_val (struct value *obj, const gdb_byte *valaddr, | |
2480 | long offset, int bit_offset, int bit_size, | |
dda83cd7 | 2481 | struct type *type) |
f93fca70 JB |
2482 | { |
2483 | struct value *v; | |
bfb1c796 | 2484 | const gdb_byte *src; /* First byte containing data to unpack */ |
f93fca70 | 2485 | gdb_byte *unpacked; |
220475ed | 2486 | const int is_scalar = is_scalar_type (type); |
d5a22e77 | 2487 | const int is_big_endian = type_byte_order (type) == BFD_ENDIAN_BIG; |
d5722aa2 | 2488 | gdb::byte_vector staging; |
f93fca70 JB |
2489 | |
2490 | type = ada_check_typedef (type); | |
2491 | ||
d0a9e810 | 2492 | if (obj == NULL) |
bfb1c796 | 2493 | src = valaddr + offset; |
d0a9e810 | 2494 | else |
bfb1c796 | 2495 | src = value_contents (obj) + offset; |
d0a9e810 JB |
2496 | |
2497 | if (is_dynamic_type (type)) | |
2498 | { | |
2499 | /* The length of TYPE might by dynamic, so we need to resolve | |
2500 | TYPE in order to know its actual size, which we then use | |
2501 | to create the contents buffer of the value we return. | |
2502 | The difficulty is that the data containing our object is | |
2503 | packed, and therefore maybe not at a byte boundary. So, what | |
2504 | we do, is unpack the data into a byte-aligned buffer, and then | |
2505 | use that buffer as our object's value for resolving the type. */ | |
d5722aa2 PA |
2506 | int staging_len = (bit_size + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT; |
2507 | staging.resize (staging_len); | |
d0a9e810 JB |
2508 | |
2509 | ada_unpack_from_contents (src, bit_offset, bit_size, | |
dda83cd7 | 2510 | staging.data (), staging.size (), |
d0a9e810 JB |
2511 | is_big_endian, has_negatives (type), |
2512 | is_scalar); | |
b249d2c2 | 2513 | type = resolve_dynamic_type (type, staging, 0); |
0cafa88c JB |
2514 | if (TYPE_LENGTH (type) < (bit_size + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT) |
2515 | { | |
2516 | /* This happens when the length of the object is dynamic, | |
2517 | and is actually smaller than the space reserved for it. | |
2518 | For instance, in an array of variant records, the bit_size | |
2519 | we're given is the array stride, which is constant and | |
2520 | normally equal to the maximum size of its element. | |
2521 | But, in reality, each element only actually spans a portion | |
2522 | of that stride. */ | |
2523 | bit_size = TYPE_LENGTH (type) * HOST_CHAR_BIT; | |
2524 | } | |
d0a9e810 JB |
2525 | } |
2526 | ||
f93fca70 JB |
2527 | if (obj == NULL) |
2528 | { | |
2529 | v = allocate_value (type); | |
bfb1c796 | 2530 | src = valaddr + offset; |
f93fca70 JB |
2531 | } |
2532 | else if (VALUE_LVAL (obj) == lval_memory && value_lazy (obj)) | |
2533 | { | |
0cafa88c | 2534 | int src_len = (bit_size + bit_offset + HOST_CHAR_BIT - 1) / 8; |
bfb1c796 | 2535 | gdb_byte *buf; |
0cafa88c | 2536 | |
f93fca70 | 2537 | v = value_at (type, value_address (obj) + offset); |
bfb1c796 PA |
2538 | buf = (gdb_byte *) alloca (src_len); |
2539 | read_memory (value_address (v), buf, src_len); | |
2540 | src = buf; | |
f93fca70 JB |
2541 | } |
2542 | else | |
2543 | { | |
2544 | v = allocate_value (type); | |
bfb1c796 | 2545 | src = value_contents (obj) + offset; |
f93fca70 JB |
2546 | } |
2547 | ||
2548 | if (obj != NULL) | |
2549 | { | |
2550 | long new_offset = offset; | |
2551 | ||
2552 | set_value_component_location (v, obj); | |
2553 | set_value_bitpos (v, bit_offset + value_bitpos (obj)); | |
2554 | set_value_bitsize (v, bit_size); | |
2555 | if (value_bitpos (v) >= HOST_CHAR_BIT) | |
dda83cd7 | 2556 | { |
f93fca70 | 2557 | ++new_offset; |
dda83cd7 SM |
2558 | set_value_bitpos (v, value_bitpos (v) - HOST_CHAR_BIT); |
2559 | } | |
f93fca70 JB |
2560 | set_value_offset (v, new_offset); |
2561 | ||
2562 | /* Also set the parent value. This is needed when trying to | |
2563 | assign a new value (in inferior memory). */ | |
2564 | set_value_parent (v, obj); | |
2565 | } | |
2566 | else | |
2567 | set_value_bitsize (v, bit_size); | |
bfb1c796 | 2568 | unpacked = value_contents_writeable (v); |
f93fca70 JB |
2569 | |
2570 | if (bit_size == 0) | |
2571 | { | |
2572 | memset (unpacked, 0, TYPE_LENGTH (type)); | |
2573 | return v; | |
2574 | } | |
2575 | ||
d5722aa2 | 2576 | if (staging.size () == TYPE_LENGTH (type)) |
f93fca70 | 2577 | { |
d0a9e810 JB |
2578 | /* Small short-cut: If we've unpacked the data into a buffer |
2579 | of the same size as TYPE's length, then we can reuse that, | |
2580 | instead of doing the unpacking again. */ | |
d5722aa2 | 2581 | memcpy (unpacked, staging.data (), staging.size ()); |
f93fca70 | 2582 | } |
d0a9e810 JB |
2583 | else |
2584 | ada_unpack_from_contents (src, bit_offset, bit_size, | |
2585 | unpacked, TYPE_LENGTH (type), | |
2586 | is_big_endian, has_negatives (type), is_scalar); | |
f93fca70 | 2587 | |
14f9c5c9 AS |
2588 | return v; |
2589 | } | |
d2e4a39e | 2590 | |
14f9c5c9 AS |
2591 | /* Store the contents of FROMVAL into the location of TOVAL. |
2592 | Return a new value with the location of TOVAL and contents of | |
2593 | FROMVAL. Handles assignment into packed fields that have | |
4c4b4cd2 | 2594 | floating-point or non-scalar types. */ |
14f9c5c9 | 2595 | |
d2e4a39e AS |
2596 | static struct value * |
2597 | ada_value_assign (struct value *toval, struct value *fromval) | |
14f9c5c9 | 2598 | { |
df407dfe AC |
2599 | struct type *type = value_type (toval); |
2600 | int bits = value_bitsize (toval); | |
14f9c5c9 | 2601 | |
52ce6436 PH |
2602 | toval = ada_coerce_ref (toval); |
2603 | fromval = ada_coerce_ref (fromval); | |
2604 | ||
2605 | if (ada_is_direct_array_type (value_type (toval))) | |
2606 | toval = ada_coerce_to_simple_array (toval); | |
2607 | if (ada_is_direct_array_type (value_type (fromval))) | |
2608 | fromval = ada_coerce_to_simple_array (fromval); | |
2609 | ||
88e3b34b | 2610 | if (!deprecated_value_modifiable (toval)) |
323e0a4a | 2611 | error (_("Left operand of assignment is not a modifiable lvalue.")); |
14f9c5c9 | 2612 | |
d2e4a39e | 2613 | if (VALUE_LVAL (toval) == lval_memory |
14f9c5c9 | 2614 | && bits > 0 |
78134374 | 2615 | && (type->code () == TYPE_CODE_FLT |
dda83cd7 | 2616 | || type->code () == TYPE_CODE_STRUCT)) |
14f9c5c9 | 2617 | { |
df407dfe AC |
2618 | int len = (value_bitpos (toval) |
2619 | + bits + HOST_CHAR_BIT - 1) / HOST_CHAR_BIT; | |
aced2898 | 2620 | int from_size; |
224c3ddb | 2621 | gdb_byte *buffer = (gdb_byte *) alloca (len); |
d2e4a39e | 2622 | struct value *val; |
42ae5230 | 2623 | CORE_ADDR to_addr = value_address (toval); |
14f9c5c9 | 2624 | |
78134374 | 2625 | if (type->code () == TYPE_CODE_FLT) |
dda83cd7 | 2626 | fromval = value_cast (type, fromval); |
14f9c5c9 | 2627 | |
52ce6436 | 2628 | read_memory (to_addr, buffer, len); |
aced2898 PH |
2629 | from_size = value_bitsize (fromval); |
2630 | if (from_size == 0) | |
2631 | from_size = TYPE_LENGTH (value_type (fromval)) * TARGET_CHAR_BIT; | |
d48e62f4 | 2632 | |
d5a22e77 | 2633 | const int is_big_endian = type_byte_order (type) == BFD_ENDIAN_BIG; |
d48e62f4 TT |
2634 | ULONGEST from_offset = 0; |
2635 | if (is_big_endian && is_scalar_type (value_type (fromval))) | |
2636 | from_offset = from_size - bits; | |
2637 | copy_bitwise (buffer, value_bitpos (toval), | |
2638 | value_contents (fromval), from_offset, | |
2639 | bits, is_big_endian); | |
972daa01 | 2640 | write_memory_with_notification (to_addr, buffer, len); |
8cebebb9 | 2641 | |
14f9c5c9 | 2642 | val = value_copy (toval); |
0fd88904 | 2643 | memcpy (value_contents_raw (val), value_contents (fromval), |
dda83cd7 | 2644 | TYPE_LENGTH (type)); |
04624583 | 2645 | deprecated_set_value_type (val, type); |
d2e4a39e | 2646 | |
14f9c5c9 AS |
2647 | return val; |
2648 | } | |
2649 | ||
2650 | return value_assign (toval, fromval); | |
2651 | } | |
2652 | ||
2653 | ||
7c512744 JB |
2654 | /* Given that COMPONENT is a memory lvalue that is part of the lvalue |
2655 | CONTAINER, assign the contents of VAL to COMPONENTS's place in | |
2656 | CONTAINER. Modifies the VALUE_CONTENTS of CONTAINER only, not | |
2657 | COMPONENT, and not the inferior's memory. The current contents | |
2658 | of COMPONENT are ignored. | |
2659 | ||
2660 | Although not part of the initial design, this function also works | |
2661 | when CONTAINER and COMPONENT are not_lval's: it works as if CONTAINER | |
2662 | had a null address, and COMPONENT had an address which is equal to | |
2663 | its offset inside CONTAINER. */ | |
2664 | ||
52ce6436 PH |
2665 | static void |
2666 | value_assign_to_component (struct value *container, struct value *component, | |
2667 | struct value *val) | |
2668 | { | |
2669 | LONGEST offset_in_container = | |
42ae5230 | 2670 | (LONGEST) (value_address (component) - value_address (container)); |
7c512744 | 2671 | int bit_offset_in_container = |
52ce6436 PH |
2672 | value_bitpos (component) - value_bitpos (container); |
2673 | int bits; | |
7c512744 | 2674 | |
52ce6436 PH |
2675 | val = value_cast (value_type (component), val); |
2676 | ||
2677 | if (value_bitsize (component) == 0) | |
2678 | bits = TARGET_CHAR_BIT * TYPE_LENGTH (value_type (component)); | |
2679 | else | |
2680 | bits = value_bitsize (component); | |
2681 | ||
d5a22e77 | 2682 | if (type_byte_order (value_type (container)) == BFD_ENDIAN_BIG) |
2a62dfa9 JB |
2683 | { |
2684 | int src_offset; | |
2685 | ||
2686 | if (is_scalar_type (check_typedef (value_type (component)))) | |
dda83cd7 | 2687 | src_offset |
2a62dfa9 JB |
2688 | = TYPE_LENGTH (value_type (component)) * TARGET_CHAR_BIT - bits; |
2689 | else | |
2690 | src_offset = 0; | |
a99bc3d2 JB |
2691 | copy_bitwise (value_contents_writeable (container) + offset_in_container, |
2692 | value_bitpos (container) + bit_offset_in_container, | |
2693 | value_contents (val), src_offset, bits, 1); | |
2a62dfa9 | 2694 | } |
52ce6436 | 2695 | else |
a99bc3d2 JB |
2696 | copy_bitwise (value_contents_writeable (container) + offset_in_container, |
2697 | value_bitpos (container) + bit_offset_in_container, | |
2698 | value_contents (val), 0, bits, 0); | |
7c512744 JB |
2699 | } |
2700 | ||
736ade86 XR |
2701 | /* Determine if TYPE is an access to an unconstrained array. */ |
2702 | ||
d91e9ea8 | 2703 | bool |
736ade86 XR |
2704 | ada_is_access_to_unconstrained_array (struct type *type) |
2705 | { | |
78134374 | 2706 | return (type->code () == TYPE_CODE_TYPEDEF |
736ade86 XR |
2707 | && is_thick_pntr (ada_typedef_target_type (type))); |
2708 | } | |
2709 | ||
4c4b4cd2 PH |
2710 | /* The value of the element of array ARR at the ARITY indices given in IND. |
2711 | ARR may be either a simple array, GNAT array descriptor, or pointer | |
14f9c5c9 AS |
2712 | thereto. */ |
2713 | ||
d2e4a39e AS |
2714 | struct value * |
2715 | ada_value_subscript (struct value *arr, int arity, struct value **ind) | |
14f9c5c9 AS |
2716 | { |
2717 | int k; | |
d2e4a39e AS |
2718 | struct value *elt; |
2719 | struct type *elt_type; | |
14f9c5c9 AS |
2720 | |
2721 | elt = ada_coerce_to_simple_array (arr); | |
2722 | ||
df407dfe | 2723 | elt_type = ada_check_typedef (value_type (elt)); |
78134374 | 2724 | if (elt_type->code () == TYPE_CODE_ARRAY |
14f9c5c9 AS |
2725 | && TYPE_FIELD_BITSIZE (elt_type, 0) > 0) |
2726 | return value_subscript_packed (elt, arity, ind); | |
2727 | ||
2728 | for (k = 0; k < arity; k += 1) | |
2729 | { | |
b9c50e9a XR |
2730 | struct type *saved_elt_type = TYPE_TARGET_TYPE (elt_type); |
2731 | ||
78134374 | 2732 | if (elt_type->code () != TYPE_CODE_ARRAY) |
dda83cd7 | 2733 | error (_("too many subscripts (%d expected)"), k); |
b9c50e9a | 2734 | |
2497b498 | 2735 | elt = value_subscript (elt, pos_atr (ind[k])); |
b9c50e9a XR |
2736 | |
2737 | if (ada_is_access_to_unconstrained_array (saved_elt_type) | |
78134374 | 2738 | && value_type (elt)->code () != TYPE_CODE_TYPEDEF) |
b9c50e9a XR |
2739 | { |
2740 | /* The element is a typedef to an unconstrained array, | |
2741 | except that the value_subscript call stripped the | |
2742 | typedef layer. The typedef layer is GNAT's way to | |
2743 | specify that the element is, at the source level, an | |
2744 | access to the unconstrained array, rather than the | |
2745 | unconstrained array. So, we need to restore that | |
2746 | typedef layer, which we can do by forcing the element's | |
2747 | type back to its original type. Otherwise, the returned | |
2748 | value is going to be printed as the array, rather | |
2749 | than as an access. Another symptom of the same issue | |
2750 | would be that an expression trying to dereference the | |
2751 | element would also be improperly rejected. */ | |
2752 | deprecated_set_value_type (elt, saved_elt_type); | |
2753 | } | |
2754 | ||
2755 | elt_type = ada_check_typedef (value_type (elt)); | |
14f9c5c9 | 2756 | } |
b9c50e9a | 2757 | |
14f9c5c9 AS |
2758 | return elt; |
2759 | } | |
2760 | ||
deede10c JB |
2761 | /* Assuming ARR is a pointer to a GDB array, the value of the element |
2762 | of *ARR at the ARITY indices given in IND. | |
919e6dbe PMR |
2763 | Does not read the entire array into memory. |
2764 | ||
2765 | Note: Unlike what one would expect, this function is used instead of | |
2766 | ada_value_subscript for basically all non-packed array types. The reason | |
2767 | for this is that a side effect of doing our own pointer arithmetics instead | |
2768 | of relying on value_subscript is that there is no implicit typedef peeling. | |
2769 | This is important for arrays of array accesses, where it allows us to | |
2770 | preserve the fact that the array's element is an array access, where the | |
2771 | access part os encoded in a typedef layer. */ | |
14f9c5c9 | 2772 | |
2c0b251b | 2773 | static struct value * |
deede10c | 2774 | ada_value_ptr_subscript (struct value *arr, int arity, struct value **ind) |
14f9c5c9 AS |
2775 | { |
2776 | int k; | |
919e6dbe | 2777 | struct value *array_ind = ada_value_ind (arr); |
deede10c | 2778 | struct type *type |
919e6dbe PMR |
2779 | = check_typedef (value_enclosing_type (array_ind)); |
2780 | ||
78134374 | 2781 | if (type->code () == TYPE_CODE_ARRAY |
919e6dbe PMR |
2782 | && TYPE_FIELD_BITSIZE (type, 0) > 0) |
2783 | return value_subscript_packed (array_ind, arity, ind); | |
14f9c5c9 AS |
2784 | |
2785 | for (k = 0; k < arity; k += 1) | |
2786 | { | |
2787 | LONGEST lwb, upb; | |
14f9c5c9 | 2788 | |
78134374 | 2789 | if (type->code () != TYPE_CODE_ARRAY) |
dda83cd7 | 2790 | error (_("too many subscripts (%d expected)"), k); |
d2e4a39e | 2791 | arr = value_cast (lookup_pointer_type (TYPE_TARGET_TYPE (type)), |
dda83cd7 | 2792 | value_copy (arr)); |
3d967001 | 2793 | get_discrete_bounds (type->index_type (), &lwb, &upb); |
53a47a3e | 2794 | arr = value_ptradd (arr, pos_atr (ind[k]) - lwb); |
14f9c5c9 AS |
2795 | type = TYPE_TARGET_TYPE (type); |
2796 | } | |
2797 | ||
2798 | return value_ind (arr); | |
2799 | } | |
2800 | ||
0b5d8877 | 2801 | /* Given that ARRAY_PTR is a pointer or reference to an array of type TYPE (the |
aa715135 JG |
2802 | actual type of ARRAY_PTR is ignored), returns the Ada slice of |
2803 | HIGH'Pos-LOW'Pos+1 elements starting at index LOW. The lower bound of | |
2804 | this array is LOW, as per Ada rules. */ | |
0b5d8877 | 2805 | static struct value * |
f5938064 | 2806 | ada_value_slice_from_ptr (struct value *array_ptr, struct type *type, |
dda83cd7 | 2807 | int low, int high) |
0b5d8877 | 2808 | { |
b0dd7688 | 2809 | struct type *type0 = ada_check_typedef (type); |
3d967001 | 2810 | struct type *base_index_type = TYPE_TARGET_TYPE (type0->index_type ()); |
0c9c3474 | 2811 | struct type *index_type |
aa715135 | 2812 | = create_static_range_type (NULL, base_index_type, low, high); |
9fe561ab JB |
2813 | struct type *slice_type = create_array_type_with_stride |
2814 | (NULL, TYPE_TARGET_TYPE (type0), index_type, | |
24e99c6c | 2815 | type0->dyn_prop (DYN_PROP_BYTE_STRIDE), |
9fe561ab | 2816 | TYPE_FIELD_BITSIZE (type0, 0)); |
3d967001 | 2817 | int base_low = ada_discrete_type_low_bound (type0->index_type ()); |
aa715135 JG |
2818 | LONGEST base_low_pos, low_pos; |
2819 | CORE_ADDR base; | |
2820 | ||
2821 | if (!discrete_position (base_index_type, low, &low_pos) | |
2822 | || !discrete_position (base_index_type, base_low, &base_low_pos)) | |
2823 | { | |
2824 | warning (_("unable to get positions in slice, use bounds instead")); | |
2825 | low_pos = low; | |
2826 | base_low_pos = base_low; | |
2827 | } | |
5b4ee69b | 2828 | |
7ff5b937 TT |
2829 | ULONGEST stride = TYPE_FIELD_BITSIZE (slice_type, 0) / 8; |
2830 | if (stride == 0) | |
2831 | stride = TYPE_LENGTH (TYPE_TARGET_TYPE (type0)); | |
2832 | ||
2833 | base = value_as_address (array_ptr) + (low_pos - base_low_pos) * stride; | |
f5938064 | 2834 | return value_at_lazy (slice_type, base); |
0b5d8877 PH |
2835 | } |
2836 | ||
2837 | ||
2838 | static struct value * | |
2839 | ada_value_slice (struct value *array, int low, int high) | |
2840 | { | |
b0dd7688 | 2841 | struct type *type = ada_check_typedef (value_type (array)); |
3d967001 | 2842 | struct type *base_index_type = TYPE_TARGET_TYPE (type->index_type ()); |
0c9c3474 | 2843 | struct type *index_type |
3d967001 | 2844 | = create_static_range_type (NULL, type->index_type (), low, high); |
9fe561ab JB |
2845 | struct type *slice_type = create_array_type_with_stride |
2846 | (NULL, TYPE_TARGET_TYPE (type), index_type, | |
24e99c6c | 2847 | type->dyn_prop (DYN_PROP_BYTE_STRIDE), |
9fe561ab | 2848 | TYPE_FIELD_BITSIZE (type, 0)); |
aa715135 | 2849 | LONGEST low_pos, high_pos; |
5b4ee69b | 2850 | |
aa715135 JG |
2851 | if (!discrete_position (base_index_type, low, &low_pos) |
2852 | || !discrete_position (base_index_type, high, &high_pos)) | |
2853 | { | |
2854 | warning (_("unable to get positions in slice, use bounds instead")); | |
2855 | low_pos = low; | |
2856 | high_pos = high; | |
2857 | } | |
2858 | ||
2859 | return value_cast (slice_type, | |
2860 | value_slice (array, low, high_pos - low_pos + 1)); | |
0b5d8877 PH |
2861 | } |
2862 | ||
14f9c5c9 AS |
2863 | /* If type is a record type in the form of a standard GNAT array |
2864 | descriptor, returns the number of dimensions for type. If arr is a | |
2865 | simple array, returns the number of "array of"s that prefix its | |
4c4b4cd2 | 2866 | type designation. Otherwise, returns 0. */ |
14f9c5c9 AS |
2867 | |
2868 | int | |
d2e4a39e | 2869 | ada_array_arity (struct type *type) |
14f9c5c9 AS |
2870 | { |
2871 | int arity; | |
2872 | ||
2873 | if (type == NULL) | |
2874 | return 0; | |
2875 | ||
2876 | type = desc_base_type (type); | |
2877 | ||
2878 | arity = 0; | |
78134374 | 2879 | if (type->code () == TYPE_CODE_STRUCT) |
14f9c5c9 | 2880 | return desc_arity (desc_bounds_type (type)); |
d2e4a39e | 2881 | else |
78134374 | 2882 | while (type->code () == TYPE_CODE_ARRAY) |
14f9c5c9 | 2883 | { |
dda83cd7 SM |
2884 | arity += 1; |
2885 | type = ada_check_typedef (TYPE_TARGET_TYPE (type)); | |
14f9c5c9 | 2886 | } |
d2e4a39e | 2887 | |
14f9c5c9 AS |
2888 | return arity; |
2889 | } | |
2890 | ||
2891 | /* If TYPE is a record type in the form of a standard GNAT array | |
2892 | descriptor or a simple array type, returns the element type for | |
2893 | TYPE after indexing by NINDICES indices, or by all indices if | |
4c4b4cd2 | 2894 | NINDICES is -1. Otherwise, returns NULL. */ |
14f9c5c9 | 2895 | |
d2e4a39e AS |
2896 | struct type * |
2897 | ada_array_element_type (struct type *type, int nindices) | |
14f9c5c9 AS |
2898 | { |
2899 | type = desc_base_type (type); | |
2900 | ||
78134374 | 2901 | if (type->code () == TYPE_CODE_STRUCT) |
14f9c5c9 AS |
2902 | { |
2903 | int k; | |
d2e4a39e | 2904 | struct type *p_array_type; |
14f9c5c9 | 2905 | |
556bdfd4 | 2906 | p_array_type = desc_data_target_type (type); |
14f9c5c9 AS |
2907 | |
2908 | k = ada_array_arity (type); | |
2909 | if (k == 0) | |
dda83cd7 | 2910 | return NULL; |
d2e4a39e | 2911 | |
4c4b4cd2 | 2912 | /* Initially p_array_type = elt_type(*)[]...(k times)...[]. */ |
14f9c5c9 | 2913 | if (nindices >= 0 && k > nindices) |
dda83cd7 | 2914 | k = nindices; |
d2e4a39e | 2915 | while (k > 0 && p_array_type != NULL) |
dda83cd7 SM |
2916 | { |
2917 | p_array_type = ada_check_typedef (TYPE_TARGET_TYPE (p_array_type)); | |
2918 | k -= 1; | |
2919 | } | |
14f9c5c9 AS |
2920 | return p_array_type; |
2921 | } | |
78134374 | 2922 | else if (type->code () == TYPE_CODE_ARRAY) |
14f9c5c9 | 2923 | { |
78134374 | 2924 | while (nindices != 0 && type->code () == TYPE_CODE_ARRAY) |
dda83cd7 SM |
2925 | { |
2926 | type = TYPE_TARGET_TYPE (type); | |
2927 | nindices -= 1; | |
2928 | } | |
14f9c5c9 AS |
2929 | return type; |
2930 | } | |
2931 | ||
2932 | return NULL; | |
2933 | } | |
2934 | ||
4c4b4cd2 | 2935 | /* The type of nth index in arrays of given type (n numbering from 1). |
dd19d49e UW |
2936 | Does not examine memory. Throws an error if N is invalid or TYPE |
2937 | is not an array type. NAME is the name of the Ada attribute being | |
2938 | evaluated ('range, 'first, 'last, or 'length); it is used in building | |
2939 | the error message. */ | |
14f9c5c9 | 2940 | |
1eea4ebd UW |
2941 | static struct type * |
2942 | ada_index_type (struct type *type, int n, const char *name) | |
14f9c5c9 | 2943 | { |
4c4b4cd2 PH |
2944 | struct type *result_type; |
2945 | ||
14f9c5c9 AS |
2946 | type = desc_base_type (type); |
2947 | ||
1eea4ebd UW |
2948 | if (n < 0 || n > ada_array_arity (type)) |
2949 | error (_("invalid dimension number to '%s"), name); | |
14f9c5c9 | 2950 | |
4c4b4cd2 | 2951 | if (ada_is_simple_array_type (type)) |
14f9c5c9 AS |
2952 | { |
2953 | int i; | |
2954 | ||
2955 | for (i = 1; i < n; i += 1) | |
dda83cd7 | 2956 | type = TYPE_TARGET_TYPE (type); |
3d967001 | 2957 | result_type = TYPE_TARGET_TYPE (type->index_type ()); |
4c4b4cd2 | 2958 | /* FIXME: The stabs type r(0,0);bound;bound in an array type |
dda83cd7 SM |
2959 | has a target type of TYPE_CODE_UNDEF. We compensate here, but |
2960 | perhaps stabsread.c would make more sense. */ | |
78134374 | 2961 | if (result_type && result_type->code () == TYPE_CODE_UNDEF) |
dda83cd7 | 2962 | result_type = NULL; |
14f9c5c9 | 2963 | } |
d2e4a39e | 2964 | else |
1eea4ebd UW |
2965 | { |
2966 | result_type = desc_index_type (desc_bounds_type (type), n); | |
2967 | if (result_type == NULL) | |
2968 | error (_("attempt to take bound of something that is not an array")); | |
2969 | } | |
2970 | ||
2971 | return result_type; | |
14f9c5c9 AS |
2972 | } |
2973 | ||
2974 | /* Given that arr is an array type, returns the lower bound of the | |
2975 | Nth index (numbering from 1) if WHICH is 0, and the upper bound if | |
4c4b4cd2 | 2976 | WHICH is 1. This returns bounds 0 .. -1 if ARR_TYPE is an |
1eea4ebd UW |
2977 | array-descriptor type. It works for other arrays with bounds supplied |
2978 | by run-time quantities other than discriminants. */ | |
14f9c5c9 | 2979 | |
abb68b3e | 2980 | static LONGEST |
fb5e3d5c | 2981 | ada_array_bound_from_type (struct type *arr_type, int n, int which) |
14f9c5c9 | 2982 | { |
8a48ac95 | 2983 | struct type *type, *index_type_desc, *index_type; |
1ce677a4 | 2984 | int i; |
262452ec JK |
2985 | |
2986 | gdb_assert (which == 0 || which == 1); | |
14f9c5c9 | 2987 | |
ad82864c JB |
2988 | if (ada_is_constrained_packed_array_type (arr_type)) |
2989 | arr_type = decode_constrained_packed_array_type (arr_type); | |
14f9c5c9 | 2990 | |
4c4b4cd2 | 2991 | if (arr_type == NULL || !ada_is_simple_array_type (arr_type)) |
1eea4ebd | 2992 | return (LONGEST) - which; |
14f9c5c9 | 2993 | |
78134374 | 2994 | if (arr_type->code () == TYPE_CODE_PTR) |
14f9c5c9 AS |
2995 | type = TYPE_TARGET_TYPE (arr_type); |
2996 | else | |
2997 | type = arr_type; | |
2998 | ||
22c4c60c | 2999 | if (type->is_fixed_instance ()) |
bafffb51 JB |
3000 | { |
3001 | /* The array has already been fixed, so we do not need to | |
3002 | check the parallel ___XA type again. That encoding has | |
3003 | already been applied, so ignore it now. */ | |
3004 | index_type_desc = NULL; | |
3005 | } | |
3006 | else | |
3007 | { | |
3008 | index_type_desc = ada_find_parallel_type (type, "___XA"); | |
3009 | ada_fixup_array_indexes_type (index_type_desc); | |
3010 | } | |
3011 | ||
262452ec | 3012 | if (index_type_desc != NULL) |
940da03e | 3013 | index_type = to_fixed_range_type (index_type_desc->field (n - 1).type (), |
28c85d6c | 3014 | NULL); |
262452ec | 3015 | else |
8a48ac95 JB |
3016 | { |
3017 | struct type *elt_type = check_typedef (type); | |
3018 | ||
3019 | for (i = 1; i < n; i++) | |
3020 | elt_type = check_typedef (TYPE_TARGET_TYPE (elt_type)); | |
3021 | ||
3d967001 | 3022 | index_type = elt_type->index_type (); |
8a48ac95 | 3023 | } |
262452ec | 3024 | |
43bbcdc2 PH |
3025 | return |
3026 | (LONGEST) (which == 0 | |
dda83cd7 SM |
3027 | ? ada_discrete_type_low_bound (index_type) |
3028 | : ada_discrete_type_high_bound (index_type)); | |
14f9c5c9 AS |
3029 | } |
3030 | ||
3031 | /* Given that arr is an array value, returns the lower bound of the | |
abb68b3e JB |
3032 | nth index (numbering from 1) if WHICH is 0, and the upper bound if |
3033 | WHICH is 1. This routine will also work for arrays with bounds | |
4c4b4cd2 | 3034 | supplied by run-time quantities other than discriminants. */ |
14f9c5c9 | 3035 | |
1eea4ebd | 3036 | static LONGEST |
4dc81987 | 3037 | ada_array_bound (struct value *arr, int n, int which) |
14f9c5c9 | 3038 | { |
eb479039 JB |
3039 | struct type *arr_type; |
3040 | ||
78134374 | 3041 | if (check_typedef (value_type (arr))->code () == TYPE_CODE_PTR) |
eb479039 JB |
3042 | arr = value_ind (arr); |
3043 | arr_type = value_enclosing_type (arr); | |
14f9c5c9 | 3044 | |
ad82864c JB |
3045 | if (ada_is_constrained_packed_array_type (arr_type)) |
3046 | return ada_array_bound (decode_constrained_packed_array (arr), n, which); | |
4c4b4cd2 | 3047 | else if (ada_is_simple_array_type (arr_type)) |
1eea4ebd | 3048 | return ada_array_bound_from_type (arr_type, n, which); |
14f9c5c9 | 3049 | else |
1eea4ebd | 3050 | return value_as_long (desc_one_bound (desc_bounds (arr), n, which)); |
14f9c5c9 AS |
3051 | } |
3052 | ||
3053 | /* Given that arr is an array value, returns the length of the | |
3054 | nth index. This routine will also work for arrays with bounds | |
4c4b4cd2 PH |
3055 | supplied by run-time quantities other than discriminants. |
3056 | Does not work for arrays indexed by enumeration types with representation | |
3057 | clauses at the moment. */ | |
14f9c5c9 | 3058 | |
1eea4ebd | 3059 | static LONGEST |
d2e4a39e | 3060 | ada_array_length (struct value *arr, int n) |
14f9c5c9 | 3061 | { |
aa715135 JG |
3062 | struct type *arr_type, *index_type; |
3063 | int low, high; | |
eb479039 | 3064 | |
78134374 | 3065 | if (check_typedef (value_type (arr))->code () == TYPE_CODE_PTR) |
eb479039 JB |
3066 | arr = value_ind (arr); |
3067 | arr_type = value_enclosing_type (arr); | |
14f9c5c9 | 3068 | |
ad82864c JB |
3069 | if (ada_is_constrained_packed_array_type (arr_type)) |
3070 | return ada_array_length (decode_constrained_packed_array (arr), n); | |
14f9c5c9 | 3071 | |
4c4b4cd2 | 3072 | if (ada_is_simple_array_type (arr_type)) |
aa715135 JG |
3073 | { |
3074 | low = ada_array_bound_from_type (arr_type, n, 0); | |
3075 | high = ada_array_bound_from_type (arr_type, n, 1); | |
3076 | } | |
14f9c5c9 | 3077 | else |
aa715135 JG |
3078 | { |
3079 | low = value_as_long (desc_one_bound (desc_bounds (arr), n, 0)); | |
3080 | high = value_as_long (desc_one_bound (desc_bounds (arr), n, 1)); | |
3081 | } | |
3082 | ||
f168693b | 3083 | arr_type = check_typedef (arr_type); |
7150d33c | 3084 | index_type = ada_index_type (arr_type, n, "length"); |
aa715135 JG |
3085 | if (index_type != NULL) |
3086 | { | |
3087 | struct type *base_type; | |
78134374 | 3088 | if (index_type->code () == TYPE_CODE_RANGE) |
aa715135 JG |
3089 | base_type = TYPE_TARGET_TYPE (index_type); |
3090 | else | |
3091 | base_type = index_type; | |
3092 | ||
3093 | low = pos_atr (value_from_longest (base_type, low)); | |
3094 | high = pos_atr (value_from_longest (base_type, high)); | |
3095 | } | |
3096 | return high - low + 1; | |
4c4b4cd2 PH |
3097 | } |
3098 | ||
bff8c71f TT |
3099 | /* An array whose type is that of ARR_TYPE (an array type), with |
3100 | bounds LOW to HIGH, but whose contents are unimportant. If HIGH is | |
3101 | less than LOW, then LOW-1 is used. */ | |
4c4b4cd2 PH |
3102 | |
3103 | static struct value * | |
bff8c71f | 3104 | empty_array (struct type *arr_type, int low, int high) |
4c4b4cd2 | 3105 | { |
b0dd7688 | 3106 | struct type *arr_type0 = ada_check_typedef (arr_type); |
0c9c3474 SA |
3107 | struct type *index_type |
3108 | = create_static_range_type | |
dda83cd7 | 3109 | (NULL, TYPE_TARGET_TYPE (arr_type0->index_type ()), low, |
bff8c71f | 3110 | high < low ? low - 1 : high); |
b0dd7688 | 3111 | struct type *elt_type = ada_array_element_type (arr_type0, 1); |
5b4ee69b | 3112 | |
0b5d8877 | 3113 | return allocate_value (create_array_type (NULL, elt_type, index_type)); |
14f9c5c9 | 3114 | } |
14f9c5c9 | 3115 | \f |
d2e4a39e | 3116 | |
dda83cd7 | 3117 | /* Name resolution */ |
14f9c5c9 | 3118 | |
4c4b4cd2 PH |
3119 | /* The "decoded" name for the user-definable Ada operator corresponding |
3120 | to OP. */ | |
14f9c5c9 | 3121 | |
d2e4a39e | 3122 | static const char * |
4c4b4cd2 | 3123 | ada_decoded_op_name (enum exp_opcode op) |
14f9c5c9 AS |
3124 | { |
3125 | int i; | |
3126 | ||
4c4b4cd2 | 3127 | for (i = 0; ada_opname_table[i].encoded != NULL; i += 1) |
14f9c5c9 AS |
3128 | { |
3129 | if (ada_opname_table[i].op == op) | |
dda83cd7 | 3130 | return ada_opname_table[i].decoded; |
14f9c5c9 | 3131 | } |
323e0a4a | 3132 | error (_("Could not find operator name for opcode")); |
14f9c5c9 AS |
3133 | } |
3134 | ||
de93309a SM |
3135 | /* Returns true (non-zero) iff decoded name N0 should appear before N1 |
3136 | in a listing of choices during disambiguation (see sort_choices, below). | |
3137 | The idea is that overloadings of a subprogram name from the | |
3138 | same package should sort in their source order. We settle for ordering | |
3139 | such symbols by their trailing number (__N or $N). */ | |
14f9c5c9 | 3140 | |
de93309a SM |
3141 | static int |
3142 | encoded_ordered_before (const char *N0, const char *N1) | |
14f9c5c9 | 3143 | { |
de93309a SM |
3144 | if (N1 == NULL) |
3145 | return 0; | |
3146 | else if (N0 == NULL) | |
3147 | return 1; | |
3148 | else | |
3149 | { | |
3150 | int k0, k1; | |
30b15541 | 3151 | |
de93309a | 3152 | for (k0 = strlen (N0) - 1; k0 > 0 && isdigit (N0[k0]); k0 -= 1) |
dda83cd7 | 3153 | ; |
de93309a | 3154 | for (k1 = strlen (N1) - 1; k1 > 0 && isdigit (N1[k1]); k1 -= 1) |
dda83cd7 | 3155 | ; |
de93309a | 3156 | if ((N0[k0] == '_' || N0[k0] == '$') && N0[k0 + 1] != '\000' |
dda83cd7 SM |
3157 | && (N1[k1] == '_' || N1[k1] == '$') && N1[k1 + 1] != '\000') |
3158 | { | |
3159 | int n0, n1; | |
3160 | ||
3161 | n0 = k0; | |
3162 | while (N0[n0] == '_' && n0 > 0 && N0[n0 - 1] == '_') | |
3163 | n0 -= 1; | |
3164 | n1 = k1; | |
3165 | while (N1[n1] == '_' && n1 > 0 && N1[n1 - 1] == '_') | |
3166 | n1 -= 1; | |
3167 | if (n0 == n1 && strncmp (N0, N1, n0) == 0) | |
3168 | return (atoi (N0 + k0 + 1) < atoi (N1 + k1 + 1)); | |
3169 | } | |
de93309a SM |
3170 | return (strcmp (N0, N1) < 0); |
3171 | } | |
14f9c5c9 AS |
3172 | } |
3173 | ||
de93309a SM |
3174 | /* Sort SYMS[0..NSYMS-1] to put the choices in a canonical order by the |
3175 | encoded names. */ | |
14f9c5c9 | 3176 | |
de93309a SM |
3177 | static void |
3178 | sort_choices (struct block_symbol syms[], int nsyms) | |
14f9c5c9 | 3179 | { |
14f9c5c9 | 3180 | int i; |
14f9c5c9 | 3181 | |
de93309a | 3182 | for (i = 1; i < nsyms; i += 1) |
14f9c5c9 | 3183 | { |
de93309a SM |
3184 | struct block_symbol sym = syms[i]; |
3185 | int j; | |
3186 | ||
3187 | for (j = i - 1; j >= 0; j -= 1) | |
dda83cd7 SM |
3188 | { |
3189 | if (encoded_ordered_before (syms[j].symbol->linkage_name (), | |
3190 | sym.symbol->linkage_name ())) | |
3191 | break; | |
3192 | syms[j + 1] = syms[j]; | |
3193 | } | |
de93309a SM |
3194 | syms[j + 1] = sym; |
3195 | } | |
3196 | } | |
14f9c5c9 | 3197 | |
de93309a SM |
3198 | /* Whether GDB should display formals and return types for functions in the |
3199 | overloads selection menu. */ | |
3200 | static bool print_signatures = true; | |
4c4b4cd2 | 3201 | |
de93309a SM |
3202 | /* Print the signature for SYM on STREAM according to the FLAGS options. For |
3203 | all but functions, the signature is just the name of the symbol. For | |
3204 | functions, this is the name of the function, the list of types for formals | |
3205 | and the return type (if any). */ | |
4c4b4cd2 | 3206 | |
de93309a SM |
3207 | static void |
3208 | ada_print_symbol_signature (struct ui_file *stream, struct symbol *sym, | |
3209 | const struct type_print_options *flags) | |
3210 | { | |
3211 | struct type *type = SYMBOL_TYPE (sym); | |
14f9c5c9 | 3212 | |
987012b8 | 3213 | fprintf_filtered (stream, "%s", sym->print_name ()); |
de93309a SM |
3214 | if (!print_signatures |
3215 | || type == NULL | |
78134374 | 3216 | || type->code () != TYPE_CODE_FUNC) |
de93309a | 3217 | return; |
4c4b4cd2 | 3218 | |
1f704f76 | 3219 | if (type->num_fields () > 0) |
de93309a SM |
3220 | { |
3221 | int i; | |
14f9c5c9 | 3222 | |
de93309a | 3223 | fprintf_filtered (stream, " ("); |
1f704f76 | 3224 | for (i = 0; i < type->num_fields (); ++i) |
de93309a SM |
3225 | { |
3226 | if (i > 0) | |
3227 | fprintf_filtered (stream, "; "); | |
940da03e | 3228 | ada_print_type (type->field (i).type (), NULL, stream, -1, 0, |
de93309a SM |
3229 | flags); |
3230 | } | |
3231 | fprintf_filtered (stream, ")"); | |
3232 | } | |
3233 | if (TYPE_TARGET_TYPE (type) != NULL | |
78134374 | 3234 | && TYPE_TARGET_TYPE (type)->code () != TYPE_CODE_VOID) |
de93309a SM |
3235 | { |
3236 | fprintf_filtered (stream, " return "); | |
3237 | ada_print_type (TYPE_TARGET_TYPE (type), NULL, stream, -1, 0, flags); | |
3238 | } | |
3239 | } | |
14f9c5c9 | 3240 | |
de93309a SM |
3241 | /* Read and validate a set of numeric choices from the user in the |
3242 | range 0 .. N_CHOICES-1. Place the results in increasing | |
3243 | order in CHOICES[0 .. N-1], and return N. | |
14f9c5c9 | 3244 | |
de93309a SM |
3245 | The user types choices as a sequence of numbers on one line |
3246 | separated by blanks, encoding them as follows: | |
14f9c5c9 | 3247 | |
de93309a SM |
3248 | + A choice of 0 means to cancel the selection, throwing an error. |
3249 | + If IS_ALL_CHOICE, a choice of 1 selects the entire set 0 .. N_CHOICES-1. | |
3250 | + The user chooses k by typing k+IS_ALL_CHOICE+1. | |
14f9c5c9 | 3251 | |
de93309a | 3252 | The user is not allowed to choose more than MAX_RESULTS values. |
14f9c5c9 | 3253 | |
de93309a SM |
3254 | ANNOTATION_SUFFIX, if present, is used to annotate the input |
3255 | prompts (for use with the -f switch). */ | |
14f9c5c9 | 3256 | |
de93309a SM |
3257 | static int |
3258 | get_selections (int *choices, int n_choices, int max_results, | |
dda83cd7 | 3259 | int is_all_choice, const char *annotation_suffix) |
de93309a | 3260 | { |
992a7040 | 3261 | const char *args; |
de93309a SM |
3262 | const char *prompt; |
3263 | int n_chosen; | |
3264 | int first_choice = is_all_choice ? 2 : 1; | |
14f9c5c9 | 3265 | |
de93309a SM |
3266 | prompt = getenv ("PS2"); |
3267 | if (prompt == NULL) | |
3268 | prompt = "> "; | |
4c4b4cd2 | 3269 | |
de93309a | 3270 | args = command_line_input (prompt, annotation_suffix); |
4c4b4cd2 | 3271 | |
de93309a SM |
3272 | if (args == NULL) |
3273 | error_no_arg (_("one or more choice numbers")); | |
14f9c5c9 | 3274 | |
de93309a | 3275 | n_chosen = 0; |
4c4b4cd2 | 3276 | |
de93309a SM |
3277 | /* Set choices[0 .. n_chosen-1] to the users' choices in ascending |
3278 | order, as given in args. Choices are validated. */ | |
3279 | while (1) | |
14f9c5c9 | 3280 | { |
de93309a SM |
3281 | char *args2; |
3282 | int choice, j; | |
76a01679 | 3283 | |
de93309a SM |
3284 | args = skip_spaces (args); |
3285 | if (*args == '\0' && n_chosen == 0) | |
dda83cd7 | 3286 | error_no_arg (_("one or more choice numbers")); |
de93309a | 3287 | else if (*args == '\0') |
dda83cd7 | 3288 | break; |
76a01679 | 3289 | |
de93309a SM |
3290 | choice = strtol (args, &args2, 10); |
3291 | if (args == args2 || choice < 0 | |
dda83cd7 SM |
3292 | || choice > n_choices + first_choice - 1) |
3293 | error (_("Argument must be choice number")); | |
de93309a | 3294 | args = args2; |
76a01679 | 3295 | |
de93309a | 3296 | if (choice == 0) |
dda83cd7 | 3297 | error (_("cancelled")); |
76a01679 | 3298 | |
de93309a | 3299 | if (choice < first_choice) |
dda83cd7 SM |
3300 | { |
3301 | n_chosen = n_choices; | |
3302 | for (j = 0; j < n_choices; j += 1) | |
3303 | choices[j] = j; | |
3304 | break; | |
3305 | } | |
de93309a | 3306 | choice -= first_choice; |
76a01679 | 3307 | |
de93309a | 3308 | for (j = n_chosen - 1; j >= 0 && choice < choices[j]; j -= 1) |
dda83cd7 SM |
3309 | { |
3310 | } | |
4c4b4cd2 | 3311 | |
de93309a | 3312 | if (j < 0 || choice != choices[j]) |
dda83cd7 SM |
3313 | { |
3314 | int k; | |
4c4b4cd2 | 3315 | |
dda83cd7 SM |
3316 | for (k = n_chosen - 1; k > j; k -= 1) |
3317 | choices[k + 1] = choices[k]; | |
3318 | choices[j + 1] = choice; | |
3319 | n_chosen += 1; | |
3320 | } | |
14f9c5c9 AS |
3321 | } |
3322 | ||
de93309a SM |
3323 | if (n_chosen > max_results) |
3324 | error (_("Select no more than %d of the above"), max_results); | |
3325 | ||
3326 | return n_chosen; | |
14f9c5c9 AS |
3327 | } |
3328 | ||
de93309a SM |
3329 | /* Given a list of NSYMS symbols in SYMS, select up to MAX_RESULTS>0 |
3330 | by asking the user (if necessary), returning the number selected, | |
3331 | and setting the first elements of SYMS items. Error if no symbols | |
3332 | selected. */ | |
3333 | ||
3334 | /* NOTE: Adapted from decode_line_2 in symtab.c, with which it ought | |
3335 | to be re-integrated one of these days. */ | |
14f9c5c9 AS |
3336 | |
3337 | static int | |
de93309a | 3338 | user_select_syms (struct block_symbol *syms, int nsyms, int max_results) |
14f9c5c9 | 3339 | { |
de93309a SM |
3340 | int i; |
3341 | int *chosen = XALLOCAVEC (int , nsyms); | |
3342 | int n_chosen; | |
3343 | int first_choice = (max_results == 1) ? 1 : 2; | |
3344 | const char *select_mode = multiple_symbols_select_mode (); | |
14f9c5c9 | 3345 | |
de93309a SM |
3346 | if (max_results < 1) |
3347 | error (_("Request to select 0 symbols!")); | |
3348 | if (nsyms <= 1) | |
3349 | return nsyms; | |
14f9c5c9 | 3350 | |
de93309a SM |
3351 | if (select_mode == multiple_symbols_cancel) |
3352 | error (_("\ | |
3353 | canceled because the command is ambiguous\n\ | |
3354 | See set/show multiple-symbol.")); | |
14f9c5c9 | 3355 | |
de93309a SM |
3356 | /* If select_mode is "all", then return all possible symbols. |
3357 | Only do that if more than one symbol can be selected, of course. | |
3358 | Otherwise, display the menu as usual. */ | |
3359 | if (select_mode == multiple_symbols_all && max_results > 1) | |
3360 | return nsyms; | |
14f9c5c9 | 3361 | |
de93309a SM |
3362 | printf_filtered (_("[0] cancel\n")); |
3363 | if (max_results > 1) | |
3364 | printf_filtered (_("[1] all\n")); | |
14f9c5c9 | 3365 | |
de93309a | 3366 | sort_choices (syms, nsyms); |
14f9c5c9 | 3367 | |
de93309a SM |
3368 | for (i = 0; i < nsyms; i += 1) |
3369 | { | |
3370 | if (syms[i].symbol == NULL) | |
dda83cd7 | 3371 | continue; |
14f9c5c9 | 3372 | |
de93309a | 3373 | if (SYMBOL_CLASS (syms[i].symbol) == LOC_BLOCK) |
dda83cd7 SM |
3374 | { |
3375 | struct symtab_and_line sal = | |
3376 | find_function_start_sal (syms[i].symbol, 1); | |
14f9c5c9 | 3377 | |
de93309a SM |
3378 | printf_filtered ("[%d] ", i + first_choice); |
3379 | ada_print_symbol_signature (gdb_stdout, syms[i].symbol, | |
3380 | &type_print_raw_options); | |
3381 | if (sal.symtab == NULL) | |
3382 | printf_filtered (_(" at %p[<no source file available>%p]:%d\n"), | |
3383 | metadata_style.style ().ptr (), nullptr, sal.line); | |
3384 | else | |
3385 | printf_filtered | |
3386 | (_(" at %ps:%d\n"), | |
3387 | styled_string (file_name_style.style (), | |
3388 | symtab_to_filename_for_display (sal.symtab)), | |
3389 | sal.line); | |
dda83cd7 SM |
3390 | continue; |
3391 | } | |
76a01679 | 3392 | else |
dda83cd7 SM |
3393 | { |
3394 | int is_enumeral = | |
3395 | (SYMBOL_CLASS (syms[i].symbol) == LOC_CONST | |
3396 | && SYMBOL_TYPE (syms[i].symbol) != NULL | |
3397 | && SYMBOL_TYPE (syms[i].symbol)->code () == TYPE_CODE_ENUM); | |
de93309a | 3398 | struct symtab *symtab = NULL; |
4c4b4cd2 | 3399 | |
de93309a SM |
3400 | if (SYMBOL_OBJFILE_OWNED (syms[i].symbol)) |
3401 | symtab = symbol_symtab (syms[i].symbol); | |
3402 | ||
dda83cd7 | 3403 | if (SYMBOL_LINE (syms[i].symbol) != 0 && symtab != NULL) |
de93309a SM |
3404 | { |
3405 | printf_filtered ("[%d] ", i + first_choice); | |
3406 | ada_print_symbol_signature (gdb_stdout, syms[i].symbol, | |
3407 | &type_print_raw_options); | |
3408 | printf_filtered (_(" at %s:%d\n"), | |
3409 | symtab_to_filename_for_display (symtab), | |
3410 | SYMBOL_LINE (syms[i].symbol)); | |
3411 | } | |
dda83cd7 SM |
3412 | else if (is_enumeral |
3413 | && SYMBOL_TYPE (syms[i].symbol)->name () != NULL) | |
3414 | { | |
3415 | printf_filtered (("[%d] "), i + first_choice); | |
3416 | ada_print_type (SYMBOL_TYPE (syms[i].symbol), NULL, | |
3417 | gdb_stdout, -1, 0, &type_print_raw_options); | |
3418 | printf_filtered (_("'(%s) (enumeral)\n"), | |
987012b8 | 3419 | syms[i].symbol->print_name ()); |
dda83cd7 | 3420 | } |
de93309a SM |
3421 | else |
3422 | { | |
3423 | printf_filtered ("[%d] ", i + first_choice); | |
3424 | ada_print_symbol_signature (gdb_stdout, syms[i].symbol, | |
3425 | &type_print_raw_options); | |
3426 | ||
3427 | if (symtab != NULL) | |
3428 | printf_filtered (is_enumeral | |
3429 | ? _(" in %s (enumeral)\n") | |
3430 | : _(" at %s:?\n"), | |
3431 | symtab_to_filename_for_display (symtab)); | |
3432 | else | |
3433 | printf_filtered (is_enumeral | |
3434 | ? _(" (enumeral)\n") | |
3435 | : _(" at ?\n")); | |
3436 | } | |
dda83cd7 | 3437 | } |
14f9c5c9 | 3438 | } |
14f9c5c9 | 3439 | |
de93309a | 3440 | n_chosen = get_selections (chosen, nsyms, max_results, max_results > 1, |
dda83cd7 | 3441 | "overload-choice"); |
14f9c5c9 | 3442 | |
de93309a SM |
3443 | for (i = 0; i < n_chosen; i += 1) |
3444 | syms[i] = syms[chosen[i]]; | |
14f9c5c9 | 3445 | |
de93309a SM |
3446 | return n_chosen; |
3447 | } | |
14f9c5c9 | 3448 | |
de93309a SM |
3449 | /* Resolve the operator of the subexpression beginning at |
3450 | position *POS of *EXPP. "Resolving" consists of replacing | |
3451 | the symbols that have undefined namespaces in OP_VAR_VALUE nodes | |
3452 | with their resolutions, replacing built-in operators with | |
3453 | function calls to user-defined operators, where appropriate, and, | |
3454 | when DEPROCEDURE_P is non-zero, converting function-valued variables | |
3455 | into parameterless calls. May expand *EXPP. The CONTEXT_TYPE functions | |
3456 | are as in ada_resolve, above. */ | |
14f9c5c9 | 3457 | |
de93309a SM |
3458 | static struct value * |
3459 | resolve_subexp (expression_up *expp, int *pos, int deprocedure_p, | |
dda83cd7 | 3460 | struct type *context_type, int parse_completion, |
de93309a | 3461 | innermost_block_tracker *tracker) |
14f9c5c9 | 3462 | { |
de93309a SM |
3463 | int pc = *pos; |
3464 | int i; | |
3465 | struct expression *exp; /* Convenience: == *expp. */ | |
3466 | enum exp_opcode op = (*expp)->elts[pc].opcode; | |
3467 | struct value **argvec; /* Vector of operand types (alloca'ed). */ | |
3468 | int nargs; /* Number of operands. */ | |
3469 | int oplen; | |
14f9c5c9 | 3470 | |
de93309a SM |
3471 | argvec = NULL; |
3472 | nargs = 0; | |
3473 | exp = expp->get (); | |
4c4b4cd2 | 3474 | |
de93309a SM |
3475 | /* Pass one: resolve operands, saving their types and updating *pos, |
3476 | if needed. */ | |
3477 | switch (op) | |
3478 | { | |
3479 | case OP_FUNCALL: | |
3480 | if (exp->elts[pc + 3].opcode == OP_VAR_VALUE | |
dda83cd7 SM |
3481 | && SYMBOL_DOMAIN (exp->elts[pc + 5].symbol) == UNDEF_DOMAIN) |
3482 | *pos += 7; | |
de93309a | 3483 | else |
dda83cd7 SM |
3484 | { |
3485 | *pos += 3; | |
3486 | resolve_subexp (expp, pos, 0, NULL, parse_completion, tracker); | |
3487 | } | |
de93309a SM |
3488 | nargs = longest_to_int (exp->elts[pc + 1].longconst); |
3489 | break; | |
14f9c5c9 | 3490 | |
de93309a SM |
3491 | case UNOP_ADDR: |
3492 | *pos += 1; | |
3493 | resolve_subexp (expp, pos, 0, NULL, parse_completion, tracker); | |
3494 | break; | |
3495 | ||
3496 | case UNOP_QUAL: | |
3497 | *pos += 3; | |
3498 | resolve_subexp (expp, pos, 1, check_typedef (exp->elts[pc + 1].type), | |
3499 | parse_completion, tracker); | |
3500 | break; | |
3501 | ||
3502 | case OP_ATR_MODULUS: | |
3503 | case OP_ATR_SIZE: | |
3504 | case OP_ATR_TAG: | |
3505 | case OP_ATR_FIRST: | |
3506 | case OP_ATR_LAST: | |
3507 | case OP_ATR_LENGTH: | |
3508 | case OP_ATR_POS: | |
3509 | case OP_ATR_VAL: | |
3510 | case OP_ATR_MIN: | |
3511 | case OP_ATR_MAX: | |
3512 | case TERNOP_IN_RANGE: | |
3513 | case BINOP_IN_BOUNDS: | |
3514 | case UNOP_IN_RANGE: | |
3515 | case OP_AGGREGATE: | |
3516 | case OP_OTHERS: | |
3517 | case OP_CHOICES: | |
3518 | case OP_POSITIONAL: | |
3519 | case OP_DISCRETE_RANGE: | |
3520 | case OP_NAME: | |
3521 | ada_forward_operator_length (exp, pc, &oplen, &nargs); | |
3522 | *pos += oplen; | |
3523 | break; | |
3524 | ||
3525 | case BINOP_ASSIGN: | |
3526 | { | |
dda83cd7 SM |
3527 | struct value *arg1; |
3528 | ||
3529 | *pos += 1; | |
3530 | arg1 = resolve_subexp (expp, pos, 0, NULL, parse_completion, tracker); | |
3531 | if (arg1 == NULL) | |
3532 | resolve_subexp (expp, pos, 1, NULL, parse_completion, tracker); | |
3533 | else | |
3534 | resolve_subexp (expp, pos, 1, value_type (arg1), parse_completion, | |
de93309a | 3535 | tracker); |
dda83cd7 | 3536 | break; |
de93309a SM |
3537 | } |
3538 | ||
3539 | case UNOP_CAST: | |
3540 | *pos += 3; | |
3541 | nargs = 1; | |
3542 | break; | |
3543 | ||
3544 | case BINOP_ADD: | |
3545 | case BINOP_SUB: | |
3546 | case BINOP_MUL: | |
3547 | case BINOP_DIV: | |
3548 | case BINOP_REM: | |
3549 | case BINOP_MOD: | |
3550 | case BINOP_EXP: | |
3551 | case BINOP_CONCAT: | |
3552 | case BINOP_LOGICAL_AND: | |
3553 | case BINOP_LOGICAL_OR: | |
3554 | case BINOP_BITWISE_AND: | |
3555 | case BINOP_BITWISE_IOR: | |
3556 | case BINOP_BITWISE_XOR: | |
3557 | ||
3558 | case BINOP_EQUAL: | |
3559 | case BINOP_NOTEQUAL: | |
3560 | case BINOP_LESS: | |
3561 | case BINOP_GTR: | |
3562 | case BINOP_LEQ: | |
3563 | case BINOP_GEQ: | |
3564 | ||
3565 | case BINOP_REPEAT: | |
3566 | case BINOP_SUBSCRIPT: | |
3567 | case BINOP_COMMA: | |
3568 | *pos += 1; | |
3569 | nargs = 2; | |
3570 | break; | |
3571 | ||
3572 | case UNOP_NEG: | |
3573 | case UNOP_PLUS: | |
3574 | case UNOP_LOGICAL_NOT: | |
3575 | case UNOP_ABS: | |
3576 | case UNOP_IND: | |
3577 | *pos += 1; | |
3578 | nargs = 1; | |
3579 | break; | |
3580 | ||
3581 | case OP_LONG: | |
3582 | case OP_FLOAT: | |
3583 | case OP_VAR_VALUE: | |
3584 | case OP_VAR_MSYM_VALUE: | |
3585 | *pos += 4; | |
3586 | break; | |
3587 | ||
3588 | case OP_TYPE: | |
3589 | case OP_BOOL: | |
3590 | case OP_LAST: | |
3591 | case OP_INTERNALVAR: | |
3592 | *pos += 3; | |
3593 | break; | |
3594 | ||
3595 | case UNOP_MEMVAL: | |
3596 | *pos += 3; | |
3597 | nargs = 1; | |
3598 | break; | |
3599 | ||
3600 | case OP_REGISTER: | |
3601 | *pos += 4 + BYTES_TO_EXP_ELEM (exp->elts[pc + 1].longconst + 1); | |
3602 | break; | |
3603 | ||
3604 | case STRUCTOP_STRUCT: | |
3605 | *pos += 4 + BYTES_TO_EXP_ELEM (exp->elts[pc + 1].longconst + 1); | |
3606 | nargs = 1; | |
3607 | break; | |
3608 | ||
3609 | case TERNOP_SLICE: | |
3610 | *pos += 1; | |
3611 | nargs = 3; | |
3612 | break; | |
3613 | ||
3614 | case OP_STRING: | |
3615 | break; | |
3616 | ||
3617 | default: | |
3618 | error (_("Unexpected operator during name resolution")); | |
14f9c5c9 | 3619 | } |
14f9c5c9 | 3620 | |
de93309a SM |
3621 | argvec = XALLOCAVEC (struct value *, nargs + 1); |
3622 | for (i = 0; i < nargs; i += 1) | |
3623 | argvec[i] = resolve_subexp (expp, pos, 1, NULL, parse_completion, | |
3624 | tracker); | |
3625 | argvec[i] = NULL; | |
3626 | exp = expp->get (); | |
4c4b4cd2 | 3627 | |
de93309a SM |
3628 | /* Pass two: perform any resolution on principal operator. */ |
3629 | switch (op) | |
14f9c5c9 | 3630 | { |
de93309a SM |
3631 | default: |
3632 | break; | |
5b4ee69b | 3633 | |
de93309a SM |
3634 | case OP_VAR_VALUE: |
3635 | if (SYMBOL_DOMAIN (exp->elts[pc + 2].symbol) == UNDEF_DOMAIN) | |
dda83cd7 SM |
3636 | { |
3637 | std::vector<struct block_symbol> candidates; | |
3638 | int n_candidates; | |
3639 | ||
3640 | n_candidates = | |
3641 | ada_lookup_symbol_list (exp->elts[pc + 2].symbol->linkage_name (), | |
3642 | exp->elts[pc + 1].block, VAR_DOMAIN, | |
3643 | &candidates); | |
3644 | ||
3645 | if (n_candidates > 1) | |
3646 | { | |
3647 | /* Types tend to get re-introduced locally, so if there | |
3648 | are any local symbols that are not types, first filter | |
3649 | out all types. */ | |
3650 | int j; | |
3651 | for (j = 0; j < n_candidates; j += 1) | |
3652 | switch (SYMBOL_CLASS (candidates[j].symbol)) | |
3653 | { | |
3654 | case LOC_REGISTER: | |
3655 | case LOC_ARG: | |
3656 | case LOC_REF_ARG: | |
3657 | case LOC_REGPARM_ADDR: | |
3658 | case LOC_LOCAL: | |
3659 | case LOC_COMPUTED: | |
3660 | goto FoundNonType; | |
3661 | default: | |
3662 | break; | |
3663 | } | |
3664 | FoundNonType: | |
3665 | if (j < n_candidates) | |
3666 | { | |
3667 | j = 0; | |
3668 | while (j < n_candidates) | |
3669 | { | |
3670 | if (SYMBOL_CLASS (candidates[j].symbol) == LOC_TYPEDEF) | |
3671 | { | |
3672 | candidates[j] = candidates[n_candidates - 1]; | |
3673 | n_candidates -= 1; | |
3674 | } | |
3675 | else | |
3676 | j += 1; | |
3677 | } | |
3678 | } | |
3679 | } | |
3680 | ||
3681 | if (n_candidates == 0) | |
3682 | error (_("No definition found for %s"), | |
3683 | exp->elts[pc + 2].symbol->print_name ()); | |
3684 | else if (n_candidates == 1) | |
3685 | i = 0; | |
3686 | else if (deprocedure_p | |
3687 | && !is_nonfunction (candidates.data (), n_candidates)) | |
3688 | { | |
3689 | i = ada_resolve_function | |
3690 | (candidates.data (), n_candidates, NULL, 0, | |
3691 | exp->elts[pc + 2].symbol->linkage_name (), | |
3692 | context_type, parse_completion); | |
3693 | if (i < 0) | |
3694 | error (_("Could not find a match for %s"), | |
3695 | exp->elts[pc + 2].symbol->print_name ()); | |
3696 | } | |
3697 | else | |
3698 | { | |
3699 | printf_filtered (_("Multiple matches for %s\n"), | |
3700 | exp->elts[pc + 2].symbol->print_name ()); | |
3701 | user_select_syms (candidates.data (), n_candidates, 1); | |
3702 | i = 0; | |
3703 | } | |
3704 | ||
3705 | exp->elts[pc + 1].block = candidates[i].block; | |
3706 | exp->elts[pc + 2].symbol = candidates[i].symbol; | |
de93309a | 3707 | tracker->update (candidates[i]); |
dda83cd7 | 3708 | } |
14f9c5c9 | 3709 | |
de93309a | 3710 | if (deprocedure_p |
dda83cd7 SM |
3711 | && (SYMBOL_TYPE (exp->elts[pc + 2].symbol)->code () |
3712 | == TYPE_CODE_FUNC)) | |
3713 | { | |
3714 | replace_operator_with_call (expp, pc, 0, 4, | |
3715 | exp->elts[pc + 2].symbol, | |
3716 | exp->elts[pc + 1].block); | |
3717 | exp = expp->get (); | |
3718 | } | |
de93309a SM |
3719 | break; |
3720 | ||
3721 | case OP_FUNCALL: | |
3722 | { | |
dda83cd7 SM |
3723 | if (exp->elts[pc + 3].opcode == OP_VAR_VALUE |
3724 | && SYMBOL_DOMAIN (exp->elts[pc + 5].symbol) == UNDEF_DOMAIN) | |
3725 | { | |
de93309a | 3726 | std::vector<struct block_symbol> candidates; |
dda83cd7 SM |
3727 | int n_candidates; |
3728 | ||
3729 | n_candidates = | |
3730 | ada_lookup_symbol_list (exp->elts[pc + 5].symbol->linkage_name (), | |
3731 | exp->elts[pc + 4].block, VAR_DOMAIN, | |
3732 | &candidates); | |
3733 | ||
3734 | if (n_candidates == 1) | |
3735 | i = 0; | |
3736 | else | |
3737 | { | |
3738 | i = ada_resolve_function | |
3739 | (candidates.data (), n_candidates, | |
3740 | argvec, nargs, | |
3741 | exp->elts[pc + 5].symbol->linkage_name (), | |
3742 | context_type, parse_completion); | |
3743 | if (i < 0) | |
3744 | error (_("Could not find a match for %s"), | |
3745 | exp->elts[pc + 5].symbol->print_name ()); | |
3746 | } | |
3747 | ||
3748 | exp->elts[pc + 4].block = candidates[i].block; | |
3749 | exp->elts[pc + 5].symbol = candidates[i].symbol; | |
de93309a | 3750 | tracker->update (candidates[i]); |
dda83cd7 | 3751 | } |
de93309a SM |
3752 | } |
3753 | break; | |
3754 | case BINOP_ADD: | |
3755 | case BINOP_SUB: | |
3756 | case BINOP_MUL: | |
3757 | case BINOP_DIV: | |
3758 | case BINOP_REM: | |
3759 | case BINOP_MOD: | |
3760 | case BINOP_CONCAT: | |
3761 | case BINOP_BITWISE_AND: | |
3762 | case BINOP_BITWISE_IOR: | |
3763 | case BINOP_BITWISE_XOR: | |
3764 | case BINOP_EQUAL: | |
3765 | case BINOP_NOTEQUAL: | |
3766 | case BINOP_LESS: | |
3767 | case BINOP_GTR: | |
3768 | case BINOP_LEQ: | |
3769 | case BINOP_GEQ: | |
3770 | case BINOP_EXP: | |
3771 | case UNOP_NEG: | |
3772 | case UNOP_PLUS: | |
3773 | case UNOP_LOGICAL_NOT: | |
3774 | case UNOP_ABS: | |
3775 | if (possible_user_operator_p (op, argvec)) | |
dda83cd7 | 3776 | { |
de93309a | 3777 | std::vector<struct block_symbol> candidates; |
dda83cd7 | 3778 | int n_candidates; |
d72413e6 | 3779 | |
dda83cd7 SM |
3780 | n_candidates = |
3781 | ada_lookup_symbol_list (ada_decoded_op_name (op), | |
de93309a | 3782 | NULL, VAR_DOMAIN, |
dda83cd7 | 3783 | &candidates); |
d72413e6 | 3784 | |
dda83cd7 | 3785 | i = ada_resolve_function (candidates.data (), n_candidates, argvec, |
de93309a SM |
3786 | nargs, ada_decoded_op_name (op), NULL, |
3787 | parse_completion); | |
dda83cd7 SM |
3788 | if (i < 0) |
3789 | break; | |
d72413e6 | 3790 | |
de93309a SM |
3791 | replace_operator_with_call (expp, pc, nargs, 1, |
3792 | candidates[i].symbol, | |
3793 | candidates[i].block); | |
dda83cd7 SM |
3794 | exp = expp->get (); |
3795 | } | |
de93309a | 3796 | break; |
d72413e6 | 3797 | |
de93309a SM |
3798 | case OP_TYPE: |
3799 | case OP_REGISTER: | |
3800 | return NULL; | |
d72413e6 | 3801 | } |
d72413e6 | 3802 | |
de93309a SM |
3803 | *pos = pc; |
3804 | if (exp->elts[pc].opcode == OP_VAR_MSYM_VALUE) | |
3805 | return evaluate_var_msym_value (EVAL_AVOID_SIDE_EFFECTS, | |
3806 | exp->elts[pc + 1].objfile, | |
3807 | exp->elts[pc + 2].msymbol); | |
3808 | else | |
3809 | return evaluate_subexp_type (exp, pos); | |
3810 | } | |
14f9c5c9 | 3811 | |
de93309a SM |
3812 | /* Return non-zero if formal type FTYPE matches actual type ATYPE. If |
3813 | MAY_DEREF is non-zero, the formal may be a pointer and the actual | |
3814 | a non-pointer. */ | |
3815 | /* The term "match" here is rather loose. The match is heuristic and | |
3816 | liberal. */ | |
14f9c5c9 | 3817 | |
de93309a SM |
3818 | static int |
3819 | ada_type_match (struct type *ftype, struct type *atype, int may_deref) | |
14f9c5c9 | 3820 | { |
de93309a SM |
3821 | ftype = ada_check_typedef (ftype); |
3822 | atype = ada_check_typedef (atype); | |
14f9c5c9 | 3823 | |
78134374 | 3824 | if (ftype->code () == TYPE_CODE_REF) |
de93309a | 3825 | ftype = TYPE_TARGET_TYPE (ftype); |
78134374 | 3826 | if (atype->code () == TYPE_CODE_REF) |
de93309a | 3827 | atype = TYPE_TARGET_TYPE (atype); |
14f9c5c9 | 3828 | |
78134374 | 3829 | switch (ftype->code ()) |
14f9c5c9 | 3830 | { |
de93309a | 3831 | default: |
78134374 | 3832 | return ftype->code () == atype->code (); |
de93309a | 3833 | case TYPE_CODE_PTR: |
78134374 | 3834 | if (atype->code () == TYPE_CODE_PTR) |
dda83cd7 SM |
3835 | return ada_type_match (TYPE_TARGET_TYPE (ftype), |
3836 | TYPE_TARGET_TYPE (atype), 0); | |
d2e4a39e | 3837 | else |
dda83cd7 SM |
3838 | return (may_deref |
3839 | && ada_type_match (TYPE_TARGET_TYPE (ftype), atype, 0)); | |
de93309a SM |
3840 | case TYPE_CODE_INT: |
3841 | case TYPE_CODE_ENUM: | |
3842 | case TYPE_CODE_RANGE: | |
78134374 | 3843 | switch (atype->code ()) |
dda83cd7 SM |
3844 | { |
3845 | case TYPE_CODE_INT: | |
3846 | case TYPE_CODE_ENUM: | |
3847 | case TYPE_CODE_RANGE: | |
3848 | return 1; | |
3849 | default: | |
3850 | return 0; | |
3851 | } | |
d2e4a39e | 3852 | |
de93309a | 3853 | case TYPE_CODE_ARRAY: |
78134374 | 3854 | return (atype->code () == TYPE_CODE_ARRAY |
dda83cd7 | 3855 | || ada_is_array_descriptor_type (atype)); |
14f9c5c9 | 3856 | |
de93309a SM |
3857 | case TYPE_CODE_STRUCT: |
3858 | if (ada_is_array_descriptor_type (ftype)) | |
dda83cd7 SM |
3859 | return (atype->code () == TYPE_CODE_ARRAY |
3860 | || ada_is_array_descriptor_type (atype)); | |
de93309a | 3861 | else |
dda83cd7 SM |
3862 | return (atype->code () == TYPE_CODE_STRUCT |
3863 | && !ada_is_array_descriptor_type (atype)); | |
14f9c5c9 | 3864 | |
de93309a SM |
3865 | case TYPE_CODE_UNION: |
3866 | case TYPE_CODE_FLT: | |
78134374 | 3867 | return (atype->code () == ftype->code ()); |
de93309a | 3868 | } |
14f9c5c9 AS |
3869 | } |
3870 | ||
de93309a SM |
3871 | /* Return non-zero if the formals of FUNC "sufficiently match" the |
3872 | vector of actual argument types ACTUALS of size N_ACTUALS. FUNC | |
3873 | may also be an enumeral, in which case it is treated as a 0- | |
3874 | argument function. */ | |
14f9c5c9 | 3875 | |
de93309a SM |
3876 | static int |
3877 | ada_args_match (struct symbol *func, struct value **actuals, int n_actuals) | |
3878 | { | |
3879 | int i; | |
3880 | struct type *func_type = SYMBOL_TYPE (func); | |
14f9c5c9 | 3881 | |
de93309a | 3882 | if (SYMBOL_CLASS (func) == LOC_CONST |
78134374 | 3883 | && func_type->code () == TYPE_CODE_ENUM) |
de93309a | 3884 | return (n_actuals == 0); |
78134374 | 3885 | else if (func_type == NULL || func_type->code () != TYPE_CODE_FUNC) |
de93309a | 3886 | return 0; |
14f9c5c9 | 3887 | |
1f704f76 | 3888 | if (func_type->num_fields () != n_actuals) |
de93309a | 3889 | return 0; |
14f9c5c9 | 3890 | |
de93309a SM |
3891 | for (i = 0; i < n_actuals; i += 1) |
3892 | { | |
3893 | if (actuals[i] == NULL) | |
dda83cd7 | 3894 | return 0; |
de93309a | 3895 | else |
dda83cd7 SM |
3896 | { |
3897 | struct type *ftype = ada_check_typedef (func_type->field (i).type ()); | |
3898 | struct type *atype = ada_check_typedef (value_type (actuals[i])); | |
14f9c5c9 | 3899 | |
dda83cd7 SM |
3900 | if (!ada_type_match (ftype, atype, 1)) |
3901 | return 0; | |
3902 | } | |
de93309a SM |
3903 | } |
3904 | return 1; | |
3905 | } | |
d2e4a39e | 3906 | |
de93309a SM |
3907 | /* False iff function type FUNC_TYPE definitely does not produce a value |
3908 | compatible with type CONTEXT_TYPE. Conservatively returns 1 if | |
3909 | FUNC_TYPE is not a valid function type with a non-null return type | |
3910 | or an enumerated type. A null CONTEXT_TYPE indicates any non-void type. */ | |
14f9c5c9 | 3911 | |
de93309a SM |
3912 | static int |
3913 | return_match (struct type *func_type, struct type *context_type) | |
3914 | { | |
3915 | struct type *return_type; | |
d2e4a39e | 3916 | |
de93309a SM |
3917 | if (func_type == NULL) |
3918 | return 1; | |
14f9c5c9 | 3919 | |
78134374 | 3920 | if (func_type->code () == TYPE_CODE_FUNC) |
de93309a SM |
3921 | return_type = get_base_type (TYPE_TARGET_TYPE (func_type)); |
3922 | else | |
3923 | return_type = get_base_type (func_type); | |
3924 | if (return_type == NULL) | |
3925 | return 1; | |
76a01679 | 3926 | |
de93309a | 3927 | context_type = get_base_type (context_type); |
14f9c5c9 | 3928 | |
78134374 | 3929 | if (return_type->code () == TYPE_CODE_ENUM) |
de93309a SM |
3930 | return context_type == NULL || return_type == context_type; |
3931 | else if (context_type == NULL) | |
78134374 | 3932 | return return_type->code () != TYPE_CODE_VOID; |
de93309a | 3933 | else |
78134374 | 3934 | return return_type->code () == context_type->code (); |
de93309a | 3935 | } |
14f9c5c9 | 3936 | |
14f9c5c9 | 3937 | |
de93309a SM |
3938 | /* Returns the index in SYMS[0..NSYMS-1] that contains the symbol for the |
3939 | function (if any) that matches the types of the NARGS arguments in | |
3940 | ARGS. If CONTEXT_TYPE is non-null and there is at least one match | |
3941 | that returns that type, then eliminate matches that don't. If | |
3942 | CONTEXT_TYPE is void and there is at least one match that does not | |
3943 | return void, eliminate all matches that do. | |
14f9c5c9 | 3944 | |
de93309a SM |
3945 | Asks the user if there is more than one match remaining. Returns -1 |
3946 | if there is no such symbol or none is selected. NAME is used | |
3947 | solely for messages. May re-arrange and modify SYMS in | |
3948 | the process; the index returned is for the modified vector. */ | |
14f9c5c9 | 3949 | |
de93309a SM |
3950 | static int |
3951 | ada_resolve_function (struct block_symbol syms[], | |
dda83cd7 SM |
3952 | int nsyms, struct value **args, int nargs, |
3953 | const char *name, struct type *context_type, | |
de93309a SM |
3954 | int parse_completion) |
3955 | { | |
3956 | int fallback; | |
3957 | int k; | |
3958 | int m; /* Number of hits */ | |
14f9c5c9 | 3959 | |
de93309a SM |
3960 | m = 0; |
3961 | /* In the first pass of the loop, we only accept functions matching | |
3962 | context_type. If none are found, we add a second pass of the loop | |
3963 | where every function is accepted. */ | |
3964 | for (fallback = 0; m == 0 && fallback < 2; fallback++) | |
3965 | { | |
3966 | for (k = 0; k < nsyms; k += 1) | |
dda83cd7 SM |
3967 | { |
3968 | struct type *type = ada_check_typedef (SYMBOL_TYPE (syms[k].symbol)); | |
5b4ee69b | 3969 | |
dda83cd7 SM |
3970 | if (ada_args_match (syms[k].symbol, args, nargs) |
3971 | && (fallback || return_match (type, context_type))) | |
3972 | { | |
3973 | syms[m] = syms[k]; | |
3974 | m += 1; | |
3975 | } | |
3976 | } | |
14f9c5c9 AS |
3977 | } |
3978 | ||
de93309a SM |
3979 | /* If we got multiple matches, ask the user which one to use. Don't do this |
3980 | interactive thing during completion, though, as the purpose of the | |
3981 | completion is providing a list of all possible matches. Prompting the | |
3982 | user to filter it down would be completely unexpected in this case. */ | |
3983 | if (m == 0) | |
3984 | return -1; | |
3985 | else if (m > 1 && !parse_completion) | |
3986 | { | |
3987 | printf_filtered (_("Multiple matches for %s\n"), name); | |
3988 | user_select_syms (syms, m, 1); | |
3989 | return 0; | |
3990 | } | |
3991 | return 0; | |
14f9c5c9 AS |
3992 | } |
3993 | ||
4c4b4cd2 PH |
3994 | /* Replace the operator of length OPLEN at position PC in *EXPP with a call |
3995 | on the function identified by SYM and BLOCK, and taking NARGS | |
3996 | arguments. Update *EXPP as needed to hold more space. */ | |
14f9c5c9 AS |
3997 | |
3998 | static void | |
e9d9f57e | 3999 | replace_operator_with_call (expression_up *expp, int pc, int nargs, |
dda83cd7 SM |
4000 | int oplen, struct symbol *sym, |
4001 | const struct block *block) | |
14f9c5c9 | 4002 | { |
00158a68 TT |
4003 | /* We want to add 6 more elements (3 for funcall, 4 for function |
4004 | symbol, -OPLEN for operator being replaced) to the | |
4005 | expression. */ | |
e9d9f57e | 4006 | struct expression *exp = expp->get (); |
00158a68 | 4007 | int save_nelts = exp->nelts; |
f51f9f1d TV |
4008 | int extra_elts = 7 - oplen; |
4009 | exp->nelts += extra_elts; | |
14f9c5c9 | 4010 | |
f51f9f1d TV |
4011 | if (extra_elts > 0) |
4012 | exp->resize (exp->nelts); | |
00158a68 TT |
4013 | memmove (exp->elts + pc + 7, exp->elts + pc + oplen, |
4014 | EXP_ELEM_TO_BYTES (save_nelts - pc - oplen)); | |
f51f9f1d TV |
4015 | if (extra_elts < 0) |
4016 | exp->resize (exp->nelts); | |
14f9c5c9 | 4017 | |
00158a68 TT |
4018 | exp->elts[pc].opcode = exp->elts[pc + 2].opcode = OP_FUNCALL; |
4019 | exp->elts[pc + 1].longconst = (LONGEST) nargs; | |
14f9c5c9 | 4020 | |
00158a68 TT |
4021 | exp->elts[pc + 3].opcode = exp->elts[pc + 6].opcode = OP_VAR_VALUE; |
4022 | exp->elts[pc + 4].block = block; | |
4023 | exp->elts[pc + 5].symbol = sym; | |
d2e4a39e | 4024 | } |
14f9c5c9 AS |
4025 | |
4026 | /* Type-class predicates */ | |
4027 | ||
4c4b4cd2 PH |
4028 | /* True iff TYPE is numeric (i.e., an INT, RANGE (of numeric type), |
4029 | or FLOAT). */ | |
14f9c5c9 AS |
4030 | |
4031 | static int | |
d2e4a39e | 4032 | numeric_type_p (struct type *type) |
14f9c5c9 AS |
4033 | { |
4034 | if (type == NULL) | |
4035 | return 0; | |
d2e4a39e AS |
4036 | else |
4037 | { | |
78134374 | 4038 | switch (type->code ()) |
dda83cd7 SM |
4039 | { |
4040 | case TYPE_CODE_INT: | |
4041 | case TYPE_CODE_FLT: | |
4042 | return 1; | |
4043 | case TYPE_CODE_RANGE: | |
4044 | return (type == TYPE_TARGET_TYPE (type) | |
4045 | || numeric_type_p (TYPE_TARGET_TYPE (type))); | |
4046 | default: | |
4047 | return 0; | |
4048 | } | |
d2e4a39e | 4049 | } |
14f9c5c9 AS |
4050 | } |
4051 | ||
4c4b4cd2 | 4052 | /* True iff TYPE is integral (an INT or RANGE of INTs). */ |
14f9c5c9 AS |
4053 | |
4054 | static int | |
d2e4a39e | 4055 | integer_type_p (struct type *type) |
14f9c5c9 AS |
4056 | { |
4057 | if (type == NULL) | |
4058 | return 0; | |
d2e4a39e AS |
4059 | else |
4060 | { | |
78134374 | 4061 | switch (type->code ()) |
dda83cd7 SM |
4062 | { |
4063 | case TYPE_CODE_INT: | |
4064 | return 1; | |
4065 | case TYPE_CODE_RANGE: | |
4066 | return (type == TYPE_TARGET_TYPE (type) | |
4067 | || integer_type_p (TYPE_TARGET_TYPE (type))); | |
4068 | default: | |
4069 | return 0; | |
4070 | } | |
d2e4a39e | 4071 | } |
14f9c5c9 AS |
4072 | } |
4073 | ||
4c4b4cd2 | 4074 | /* True iff TYPE is scalar (INT, RANGE, FLOAT, ENUM). */ |
14f9c5c9 AS |
4075 | |
4076 | static int | |
d2e4a39e | 4077 | scalar_type_p (struct type *type) |
14f9c5c9 AS |
4078 | { |
4079 | if (type == NULL) | |
4080 | return 0; | |
d2e4a39e AS |
4081 | else |
4082 | { | |
78134374 | 4083 | switch (type->code ()) |
dda83cd7 SM |
4084 | { |
4085 | case TYPE_CODE_INT: | |
4086 | case TYPE_CODE_RANGE: | |
4087 | case TYPE_CODE_ENUM: | |
4088 | case TYPE_CODE_FLT: | |
4089 | return 1; | |
4090 | default: | |
4091 | return 0; | |
4092 | } | |
d2e4a39e | 4093 | } |
14f9c5c9 AS |
4094 | } |
4095 | ||
4c4b4cd2 | 4096 | /* True iff TYPE is discrete (INT, RANGE, ENUM). */ |
14f9c5c9 AS |
4097 | |
4098 | static int | |
d2e4a39e | 4099 | discrete_type_p (struct type *type) |
14f9c5c9 AS |
4100 | { |
4101 | if (type == NULL) | |
4102 | return 0; | |
d2e4a39e AS |
4103 | else |
4104 | { | |
78134374 | 4105 | switch (type->code ()) |
dda83cd7 SM |
4106 | { |
4107 | case TYPE_CODE_INT: | |
4108 | case TYPE_CODE_RANGE: | |
4109 | case TYPE_CODE_ENUM: | |
4110 | case TYPE_CODE_BOOL: | |
4111 | return 1; | |
4112 | default: | |
4113 | return 0; | |
4114 | } | |
d2e4a39e | 4115 | } |
14f9c5c9 AS |
4116 | } |
4117 | ||
4c4b4cd2 PH |
4118 | /* Returns non-zero if OP with operands in the vector ARGS could be |
4119 | a user-defined function. Errs on the side of pre-defined operators | |
4120 | (i.e., result 0). */ | |
14f9c5c9 AS |
4121 | |
4122 | static int | |
d2e4a39e | 4123 | possible_user_operator_p (enum exp_opcode op, struct value *args[]) |
14f9c5c9 | 4124 | { |
76a01679 | 4125 | struct type *type0 = |
df407dfe | 4126 | (args[0] == NULL) ? NULL : ada_check_typedef (value_type (args[0])); |
d2e4a39e | 4127 | struct type *type1 = |
df407dfe | 4128 | (args[1] == NULL) ? NULL : ada_check_typedef (value_type (args[1])); |
d2e4a39e | 4129 | |
4c4b4cd2 PH |
4130 | if (type0 == NULL) |
4131 | return 0; | |
4132 | ||
14f9c5c9 AS |
4133 | switch (op) |
4134 | { | |
4135 | default: | |
4136 | return 0; | |
4137 | ||
4138 | case BINOP_ADD: | |
4139 | case BINOP_SUB: | |
4140 | case BINOP_MUL: | |
4141 | case BINOP_DIV: | |
d2e4a39e | 4142 | return (!(numeric_type_p (type0) && numeric_type_p (type1))); |
14f9c5c9 AS |
4143 | |
4144 | case BINOP_REM: | |
4145 | case BINOP_MOD: | |
4146 | case BINOP_BITWISE_AND: | |
4147 | case BINOP_BITWISE_IOR: | |
4148 | case BINOP_BITWISE_XOR: | |
d2e4a39e | 4149 | return (!(integer_type_p (type0) && integer_type_p (type1))); |
14f9c5c9 AS |
4150 | |
4151 | case BINOP_EQUAL: | |
4152 | case BINOP_NOTEQUAL: | |
4153 | case BINOP_LESS: | |
4154 | case BINOP_GTR: | |
4155 | case BINOP_LEQ: | |
4156 | case BINOP_GEQ: | |
d2e4a39e | 4157 | return (!(scalar_type_p (type0) && scalar_type_p (type1))); |
14f9c5c9 AS |
4158 | |
4159 | case BINOP_CONCAT: | |
ee90b9ab | 4160 | return !ada_is_array_type (type0) || !ada_is_array_type (type1); |
14f9c5c9 AS |
4161 | |
4162 | case BINOP_EXP: | |
d2e4a39e | 4163 | return (!(numeric_type_p (type0) && integer_type_p (type1))); |
14f9c5c9 AS |
4164 | |
4165 | case UNOP_NEG: | |
4166 | case UNOP_PLUS: | |
4167 | case UNOP_LOGICAL_NOT: | |
d2e4a39e AS |
4168 | case UNOP_ABS: |
4169 | return (!numeric_type_p (type0)); | |
14f9c5c9 AS |
4170 | |
4171 | } | |
4172 | } | |
4173 | \f | |
dda83cd7 | 4174 | /* Renaming */ |
14f9c5c9 | 4175 | |
aeb5907d JB |
4176 | /* NOTES: |
4177 | ||
4178 | 1. In the following, we assume that a renaming type's name may | |
4179 | have an ___XD suffix. It would be nice if this went away at some | |
4180 | point. | |
4181 | 2. We handle both the (old) purely type-based representation of | |
4182 | renamings and the (new) variable-based encoding. At some point, | |
4183 | it is devoutly to be hoped that the former goes away | |
4184 | (FIXME: hilfinger-2007-07-09). | |
4185 | 3. Subprogram renamings are not implemented, although the XRS | |
4186 | suffix is recognized (FIXME: hilfinger-2007-07-09). */ | |
4187 | ||
4188 | /* If SYM encodes a renaming, | |
4189 | ||
4190 | <renaming> renames <renamed entity>, | |
4191 | ||
4192 | sets *LEN to the length of the renamed entity's name, | |
4193 | *RENAMED_ENTITY to that name (not null-terminated), and *RENAMING_EXPR to | |
4194 | the string describing the subcomponent selected from the renamed | |
0963b4bd | 4195 | entity. Returns ADA_NOT_RENAMING if SYM does not encode a renaming |
aeb5907d JB |
4196 | (in which case, the values of *RENAMED_ENTITY, *LEN, and *RENAMING_EXPR |
4197 | are undefined). Otherwise, returns a value indicating the category | |
4198 | of entity renamed: an object (ADA_OBJECT_RENAMING), exception | |
4199 | (ADA_EXCEPTION_RENAMING), package (ADA_PACKAGE_RENAMING), or | |
4200 | subprogram (ADA_SUBPROGRAM_RENAMING). Does no allocation; the | |
4201 | strings returned in *RENAMED_ENTITY and *RENAMING_EXPR should not be | |
4202 | deallocated. The values of RENAMED_ENTITY, LEN, or RENAMING_EXPR | |
4203 | may be NULL, in which case they are not assigned. | |
4204 | ||
4205 | [Currently, however, GCC does not generate subprogram renamings.] */ | |
4206 | ||
4207 | enum ada_renaming_category | |
4208 | ada_parse_renaming (struct symbol *sym, | |
4209 | const char **renamed_entity, int *len, | |
4210 | const char **renaming_expr) | |
4211 | { | |
4212 | enum ada_renaming_category kind; | |
4213 | const char *info; | |
4214 | const char *suffix; | |
4215 | ||
4216 | if (sym == NULL) | |
4217 | return ADA_NOT_RENAMING; | |
4218 | switch (SYMBOL_CLASS (sym)) | |
14f9c5c9 | 4219 | { |
aeb5907d JB |
4220 | default: |
4221 | return ADA_NOT_RENAMING; | |
aeb5907d JB |
4222 | case LOC_LOCAL: |
4223 | case LOC_STATIC: | |
4224 | case LOC_COMPUTED: | |
4225 | case LOC_OPTIMIZED_OUT: | |
987012b8 | 4226 | info = strstr (sym->linkage_name (), "___XR"); |
aeb5907d JB |
4227 | if (info == NULL) |
4228 | return ADA_NOT_RENAMING; | |
4229 | switch (info[5]) | |
4230 | { | |
4231 | case '_': | |
4232 | kind = ADA_OBJECT_RENAMING; | |
4233 | info += 6; | |
4234 | break; | |
4235 | case 'E': | |
4236 | kind = ADA_EXCEPTION_RENAMING; | |
4237 | info += 7; | |
4238 | break; | |
4239 | case 'P': | |
4240 | kind = ADA_PACKAGE_RENAMING; | |
4241 | info += 7; | |
4242 | break; | |
4243 | case 'S': | |
4244 | kind = ADA_SUBPROGRAM_RENAMING; | |
4245 | info += 7; | |
4246 | break; | |
4247 | default: | |
4248 | return ADA_NOT_RENAMING; | |
4249 | } | |
14f9c5c9 | 4250 | } |
4c4b4cd2 | 4251 | |
de93309a SM |
4252 | if (renamed_entity != NULL) |
4253 | *renamed_entity = info; | |
4254 | suffix = strstr (info, "___XE"); | |
4255 | if (suffix == NULL || suffix == info) | |
4256 | return ADA_NOT_RENAMING; | |
4257 | if (len != NULL) | |
4258 | *len = strlen (info) - strlen (suffix); | |
4259 | suffix += 5; | |
4260 | if (renaming_expr != NULL) | |
4261 | *renaming_expr = suffix; | |
4262 | return kind; | |
4263 | } | |
4264 | ||
4265 | /* Compute the value of the given RENAMING_SYM, which is expected to | |
4266 | be a symbol encoding a renaming expression. BLOCK is the block | |
4267 | used to evaluate the renaming. */ | |
4268 | ||
4269 | static struct value * | |
4270 | ada_read_renaming_var_value (struct symbol *renaming_sym, | |
4271 | const struct block *block) | |
4272 | { | |
4273 | const char *sym_name; | |
4274 | ||
987012b8 | 4275 | sym_name = renaming_sym->linkage_name (); |
de93309a SM |
4276 | expression_up expr = parse_exp_1 (&sym_name, 0, block, 0); |
4277 | return evaluate_expression (expr.get ()); | |
4278 | } | |
4279 | \f | |
4280 | ||
dda83cd7 | 4281 | /* Evaluation: Function Calls */ |
de93309a SM |
4282 | |
4283 | /* Return an lvalue containing the value VAL. This is the identity on | |
4284 | lvalues, and otherwise has the side-effect of allocating memory | |
4285 | in the inferior where a copy of the value contents is copied. */ | |
4286 | ||
4287 | static struct value * | |
4288 | ensure_lval (struct value *val) | |
4289 | { | |
4290 | if (VALUE_LVAL (val) == not_lval | |
4291 | || VALUE_LVAL (val) == lval_internalvar) | |
4292 | { | |
4293 | int len = TYPE_LENGTH (ada_check_typedef (value_type (val))); | |
4294 | const CORE_ADDR addr = | |
dda83cd7 | 4295 | value_as_long (value_allocate_space_in_inferior (len)); |
de93309a SM |
4296 | |
4297 | VALUE_LVAL (val) = lval_memory; | |
4298 | set_value_address (val, addr); | |
4299 | write_memory (addr, value_contents (val), len); | |
4300 | } | |
4301 | ||
4302 | return val; | |
4303 | } | |
4304 | ||
4305 | /* Given ARG, a value of type (pointer or reference to a)* | |
4306 | structure/union, extract the component named NAME from the ultimate | |
4307 | target structure/union and return it as a value with its | |
4308 | appropriate type. | |
4309 | ||
4310 | The routine searches for NAME among all members of the structure itself | |
4311 | and (recursively) among all members of any wrapper members | |
4312 | (e.g., '_parent'). | |
4313 | ||
4314 | If NO_ERR, then simply return NULL in case of error, rather than | |
4315 | calling error. */ | |
4316 | ||
4317 | static struct value * | |
4318 | ada_value_struct_elt (struct value *arg, const char *name, int no_err) | |
4319 | { | |
4320 | struct type *t, *t1; | |
4321 | struct value *v; | |
4322 | int check_tag; | |
4323 | ||
4324 | v = NULL; | |
4325 | t1 = t = ada_check_typedef (value_type (arg)); | |
78134374 | 4326 | if (t->code () == TYPE_CODE_REF) |
de93309a SM |
4327 | { |
4328 | t1 = TYPE_TARGET_TYPE (t); | |
4329 | if (t1 == NULL) | |
4330 | goto BadValue; | |
4331 | t1 = ada_check_typedef (t1); | |
78134374 | 4332 | if (t1->code () == TYPE_CODE_PTR) |
dda83cd7 SM |
4333 | { |
4334 | arg = coerce_ref (arg); | |
4335 | t = t1; | |
4336 | } | |
de93309a SM |
4337 | } |
4338 | ||
78134374 | 4339 | while (t->code () == TYPE_CODE_PTR) |
de93309a SM |
4340 | { |
4341 | t1 = TYPE_TARGET_TYPE (t); | |
4342 | if (t1 == NULL) | |
4343 | goto BadValue; | |
4344 | t1 = ada_check_typedef (t1); | |
78134374 | 4345 | if (t1->code () == TYPE_CODE_PTR) |
dda83cd7 SM |
4346 | { |
4347 | arg = value_ind (arg); | |
4348 | t = t1; | |
4349 | } | |
de93309a | 4350 | else |
dda83cd7 | 4351 | break; |
de93309a | 4352 | } |
aeb5907d | 4353 | |
78134374 | 4354 | if (t1->code () != TYPE_CODE_STRUCT && t1->code () != TYPE_CODE_UNION) |
de93309a | 4355 | goto BadValue; |
52ce6436 | 4356 | |
de93309a SM |
4357 | if (t1 == t) |
4358 | v = ada_search_struct_field (name, arg, 0, t); | |
4359 | else | |
4360 | { | |
4361 | int bit_offset, bit_size, byte_offset; | |
4362 | struct type *field_type; | |
4363 | CORE_ADDR address; | |
a5ee536b | 4364 | |
78134374 | 4365 | if (t->code () == TYPE_CODE_PTR) |
de93309a SM |
4366 | address = value_address (ada_value_ind (arg)); |
4367 | else | |
4368 | address = value_address (ada_coerce_ref (arg)); | |
d2e4a39e | 4369 | |
de93309a | 4370 | /* Check to see if this is a tagged type. We also need to handle |
dda83cd7 SM |
4371 | the case where the type is a reference to a tagged type, but |
4372 | we have to be careful to exclude pointers to tagged types. | |
4373 | The latter should be shown as usual (as a pointer), whereas | |
4374 | a reference should mostly be transparent to the user. */ | |
14f9c5c9 | 4375 | |
de93309a | 4376 | if (ada_is_tagged_type (t1, 0) |
dda83cd7 SM |
4377 | || (t1->code () == TYPE_CODE_REF |
4378 | && ada_is_tagged_type (TYPE_TARGET_TYPE (t1), 0))) | |
4379 | { | |
4380 | /* We first try to find the searched field in the current type. | |
de93309a | 4381 | If not found then let's look in the fixed type. */ |
14f9c5c9 | 4382 | |
dda83cd7 SM |
4383 | if (!find_struct_field (name, t1, 0, |
4384 | &field_type, &byte_offset, &bit_offset, | |
4385 | &bit_size, NULL)) | |
de93309a SM |
4386 | check_tag = 1; |
4387 | else | |
4388 | check_tag = 0; | |
dda83cd7 | 4389 | } |
de93309a SM |
4390 | else |
4391 | check_tag = 0; | |
c3e5cd34 | 4392 | |
de93309a SM |
4393 | /* Convert to fixed type in all cases, so that we have proper |
4394 | offsets to each field in unconstrained record types. */ | |
4395 | t1 = ada_to_fixed_type (ada_get_base_type (t1), NULL, | |
4396 | address, NULL, check_tag); | |
4397 | ||
24aa1b02 TT |
4398 | /* Resolve the dynamic type as well. */ |
4399 | arg = value_from_contents_and_address (t1, nullptr, address); | |
4400 | t1 = value_type (arg); | |
4401 | ||
de93309a | 4402 | if (find_struct_field (name, t1, 0, |
dda83cd7 SM |
4403 | &field_type, &byte_offset, &bit_offset, |
4404 | &bit_size, NULL)) | |
4405 | { | |
4406 | if (bit_size != 0) | |
4407 | { | |
4408 | if (t->code () == TYPE_CODE_REF) | |
4409 | arg = ada_coerce_ref (arg); | |
4410 | else | |
4411 | arg = ada_value_ind (arg); | |
4412 | v = ada_value_primitive_packed_val (arg, NULL, byte_offset, | |
4413 | bit_offset, bit_size, | |
4414 | field_type); | |
4415 | } | |
4416 | else | |
4417 | v = value_at_lazy (field_type, address + byte_offset); | |
4418 | } | |
c3e5cd34 | 4419 | } |
14f9c5c9 | 4420 | |
de93309a SM |
4421 | if (v != NULL || no_err) |
4422 | return v; | |
4423 | else | |
4424 | error (_("There is no member named %s."), name); | |
4425 | ||
4426 | BadValue: | |
4427 | if (no_err) | |
4428 | return NULL; | |
4429 | else | |
4430 | error (_("Attempt to extract a component of " | |
4431 | "a value that is not a record.")); | |
14f9c5c9 AS |
4432 | } |
4433 | ||
4434 | /* Return the value ACTUAL, converted to be an appropriate value for a | |
4435 | formal of type FORMAL_TYPE. Use *SP as a stack pointer for | |
4436 | allocating any necessary descriptors (fat pointers), or copies of | |
4c4b4cd2 | 4437 | values not residing in memory, updating it as needed. */ |
14f9c5c9 | 4438 | |
a93c0eb6 | 4439 | struct value * |
40bc484c | 4440 | ada_convert_actual (struct value *actual, struct type *formal_type0) |
14f9c5c9 | 4441 | { |
df407dfe | 4442 | struct type *actual_type = ada_check_typedef (value_type (actual)); |
61ee279c | 4443 | struct type *formal_type = ada_check_typedef (formal_type0); |
d2e4a39e | 4444 | struct type *formal_target = |
78134374 | 4445 | formal_type->code () == TYPE_CODE_PTR |
61ee279c | 4446 | ? ada_check_typedef (TYPE_TARGET_TYPE (formal_type)) : formal_type; |
d2e4a39e | 4447 | struct type *actual_target = |
78134374 | 4448 | actual_type->code () == TYPE_CODE_PTR |
61ee279c | 4449 | ? ada_check_typedef (TYPE_TARGET_TYPE (actual_type)) : actual_type; |
14f9c5c9 | 4450 | |
4c4b4cd2 | 4451 | if (ada_is_array_descriptor_type (formal_target) |
78134374 | 4452 | && actual_target->code () == TYPE_CODE_ARRAY) |
40bc484c | 4453 | return make_array_descriptor (formal_type, actual); |
78134374 SM |
4454 | else if (formal_type->code () == TYPE_CODE_PTR |
4455 | || formal_type->code () == TYPE_CODE_REF) | |
14f9c5c9 | 4456 | { |
a84a8a0d | 4457 | struct value *result; |
5b4ee69b | 4458 | |
78134374 | 4459 | if (formal_target->code () == TYPE_CODE_ARRAY |
dda83cd7 | 4460 | && ada_is_array_descriptor_type (actual_target)) |
a84a8a0d | 4461 | result = desc_data (actual); |
78134374 | 4462 | else if (formal_type->code () != TYPE_CODE_PTR) |
dda83cd7 SM |
4463 | { |
4464 | if (VALUE_LVAL (actual) != lval_memory) | |
4465 | { | |
4466 | struct value *val; | |
4467 | ||
4468 | actual_type = ada_check_typedef (value_type (actual)); | |
4469 | val = allocate_value (actual_type); | |
4470 | memcpy ((char *) value_contents_raw (val), | |
4471 | (char *) value_contents (actual), | |
4472 | TYPE_LENGTH (actual_type)); | |
4473 | actual = ensure_lval (val); | |
4474 | } | |
4475 | result = value_addr (actual); | |
4476 | } | |
a84a8a0d JB |
4477 | else |
4478 | return actual; | |
b1af9e97 | 4479 | return value_cast_pointers (formal_type, result, 0); |
14f9c5c9 | 4480 | } |
78134374 | 4481 | else if (actual_type->code () == TYPE_CODE_PTR) |
14f9c5c9 | 4482 | return ada_value_ind (actual); |
8344af1e JB |
4483 | else if (ada_is_aligner_type (formal_type)) |
4484 | { | |
4485 | /* We need to turn this parameter into an aligner type | |
4486 | as well. */ | |
4487 | struct value *aligner = allocate_value (formal_type); | |
4488 | struct value *component = ada_value_struct_elt (aligner, "F", 0); | |
4489 | ||
4490 | value_assign_to_component (aligner, component, actual); | |
4491 | return aligner; | |
4492 | } | |
14f9c5c9 AS |
4493 | |
4494 | return actual; | |
4495 | } | |
4496 | ||
438c98a1 JB |
4497 | /* Convert VALUE (which must be an address) to a CORE_ADDR that is a pointer of |
4498 | type TYPE. This is usually an inefficient no-op except on some targets | |
4499 | (such as AVR) where the representation of a pointer and an address | |
4500 | differs. */ | |
4501 | ||
4502 | static CORE_ADDR | |
4503 | value_pointer (struct value *value, struct type *type) | |
4504 | { | |
4505 | struct gdbarch *gdbarch = get_type_arch (type); | |
4506 | unsigned len = TYPE_LENGTH (type); | |
224c3ddb | 4507 | gdb_byte *buf = (gdb_byte *) alloca (len); |
438c98a1 JB |
4508 | CORE_ADDR addr; |
4509 | ||
4510 | addr = value_address (value); | |
4511 | gdbarch_address_to_pointer (gdbarch, type, buf, addr); | |
34877895 | 4512 | addr = extract_unsigned_integer (buf, len, type_byte_order (type)); |
438c98a1 JB |
4513 | return addr; |
4514 | } | |
4515 | ||
14f9c5c9 | 4516 | |
4c4b4cd2 PH |
4517 | /* Push a descriptor of type TYPE for array value ARR on the stack at |
4518 | *SP, updating *SP to reflect the new descriptor. Return either | |
14f9c5c9 | 4519 | an lvalue representing the new descriptor, or (if TYPE is a pointer- |
4c4b4cd2 PH |
4520 | to-descriptor type rather than a descriptor type), a struct value * |
4521 | representing a pointer to this descriptor. */ | |
14f9c5c9 | 4522 | |
d2e4a39e | 4523 | static struct value * |
40bc484c | 4524 | make_array_descriptor (struct type *type, struct value *arr) |
14f9c5c9 | 4525 | { |
d2e4a39e AS |
4526 | struct type *bounds_type = desc_bounds_type (type); |
4527 | struct type *desc_type = desc_base_type (type); | |
4528 | struct value *descriptor = allocate_value (desc_type); | |
4529 | struct value *bounds = allocate_value (bounds_type); | |
14f9c5c9 | 4530 | int i; |
d2e4a39e | 4531 | |
0963b4bd MS |
4532 | for (i = ada_array_arity (ada_check_typedef (value_type (arr))); |
4533 | i > 0; i -= 1) | |
14f9c5c9 | 4534 | { |
19f220c3 JK |
4535 | modify_field (value_type (bounds), value_contents_writeable (bounds), |
4536 | ada_array_bound (arr, i, 0), | |
4537 | desc_bound_bitpos (bounds_type, i, 0), | |
4538 | desc_bound_bitsize (bounds_type, i, 0)); | |
4539 | modify_field (value_type (bounds), value_contents_writeable (bounds), | |
4540 | ada_array_bound (arr, i, 1), | |
4541 | desc_bound_bitpos (bounds_type, i, 1), | |
4542 | desc_bound_bitsize (bounds_type, i, 1)); | |
14f9c5c9 | 4543 | } |
d2e4a39e | 4544 | |
40bc484c | 4545 | bounds = ensure_lval (bounds); |
d2e4a39e | 4546 | |
19f220c3 JK |
4547 | modify_field (value_type (descriptor), |
4548 | value_contents_writeable (descriptor), | |
4549 | value_pointer (ensure_lval (arr), | |
940da03e | 4550 | desc_type->field (0).type ()), |
19f220c3 JK |
4551 | fat_pntr_data_bitpos (desc_type), |
4552 | fat_pntr_data_bitsize (desc_type)); | |
4553 | ||
4554 | modify_field (value_type (descriptor), | |
4555 | value_contents_writeable (descriptor), | |
4556 | value_pointer (bounds, | |
940da03e | 4557 | desc_type->field (1).type ()), |
19f220c3 JK |
4558 | fat_pntr_bounds_bitpos (desc_type), |
4559 | fat_pntr_bounds_bitsize (desc_type)); | |
14f9c5c9 | 4560 | |
40bc484c | 4561 | descriptor = ensure_lval (descriptor); |
14f9c5c9 | 4562 | |
78134374 | 4563 | if (type->code () == TYPE_CODE_PTR) |
14f9c5c9 AS |
4564 | return value_addr (descriptor); |
4565 | else | |
4566 | return descriptor; | |
4567 | } | |
14f9c5c9 | 4568 | \f |
dda83cd7 | 4569 | /* Symbol Cache Module */ |
3d9434b5 | 4570 | |
3d9434b5 | 4571 | /* Performance measurements made as of 2010-01-15 indicate that |
ee01b665 | 4572 | this cache does bring some noticeable improvements. Depending |
3d9434b5 JB |
4573 | on the type of entity being printed, the cache can make it as much |
4574 | as an order of magnitude faster than without it. | |
4575 | ||
4576 | The descriptive type DWARF extension has significantly reduced | |
4577 | the need for this cache, at least when DWARF is being used. However, | |
4578 | even in this case, some expensive name-based symbol searches are still | |
4579 | sometimes necessary - to find an XVZ variable, mostly. */ | |
4580 | ||
ee01b665 | 4581 | /* Initialize the contents of SYM_CACHE. */ |
3d9434b5 | 4582 | |
ee01b665 JB |
4583 | static void |
4584 | ada_init_symbol_cache (struct ada_symbol_cache *sym_cache) | |
4585 | { | |
4586 | obstack_init (&sym_cache->cache_space); | |
4587 | memset (sym_cache->root, '\000', sizeof (sym_cache->root)); | |
4588 | } | |
3d9434b5 | 4589 | |
ee01b665 JB |
4590 | /* Free the memory used by SYM_CACHE. */ |
4591 | ||
4592 | static void | |
4593 | ada_free_symbol_cache (struct ada_symbol_cache *sym_cache) | |
3d9434b5 | 4594 | { |
ee01b665 JB |
4595 | obstack_free (&sym_cache->cache_space, NULL); |
4596 | xfree (sym_cache); | |
4597 | } | |
3d9434b5 | 4598 | |
ee01b665 JB |
4599 | /* Return the symbol cache associated to the given program space PSPACE. |
4600 | If not allocated for this PSPACE yet, allocate and initialize one. */ | |
3d9434b5 | 4601 | |
ee01b665 JB |
4602 | static struct ada_symbol_cache * |
4603 | ada_get_symbol_cache (struct program_space *pspace) | |
4604 | { | |
4605 | struct ada_pspace_data *pspace_data = get_ada_pspace_data (pspace); | |
ee01b665 | 4606 | |
66c168ae | 4607 | if (pspace_data->sym_cache == NULL) |
ee01b665 | 4608 | { |
66c168ae JB |
4609 | pspace_data->sym_cache = XCNEW (struct ada_symbol_cache); |
4610 | ada_init_symbol_cache (pspace_data->sym_cache); | |
ee01b665 JB |
4611 | } |
4612 | ||
66c168ae | 4613 | return pspace_data->sym_cache; |
ee01b665 | 4614 | } |
3d9434b5 JB |
4615 | |
4616 | /* Clear all entries from the symbol cache. */ | |
4617 | ||
4618 | static void | |
4619 | ada_clear_symbol_cache (void) | |
4620 | { | |
ee01b665 JB |
4621 | struct ada_symbol_cache *sym_cache |
4622 | = ada_get_symbol_cache (current_program_space); | |
4623 | ||
4624 | obstack_free (&sym_cache->cache_space, NULL); | |
4625 | ada_init_symbol_cache (sym_cache); | |
3d9434b5 JB |
4626 | } |
4627 | ||
fe978cb0 | 4628 | /* Search our cache for an entry matching NAME and DOMAIN. |
3d9434b5 JB |
4629 | Return it if found, or NULL otherwise. */ |
4630 | ||
4631 | static struct cache_entry ** | |
fe978cb0 | 4632 | find_entry (const char *name, domain_enum domain) |
3d9434b5 | 4633 | { |
ee01b665 JB |
4634 | struct ada_symbol_cache *sym_cache |
4635 | = ada_get_symbol_cache (current_program_space); | |
3d9434b5 JB |
4636 | int h = msymbol_hash (name) % HASH_SIZE; |
4637 | struct cache_entry **e; | |
4638 | ||
ee01b665 | 4639 | for (e = &sym_cache->root[h]; *e != NULL; e = &(*e)->next) |
3d9434b5 | 4640 | { |
fe978cb0 | 4641 | if (domain == (*e)->domain && strcmp (name, (*e)->name) == 0) |
dda83cd7 | 4642 | return e; |
3d9434b5 JB |
4643 | } |
4644 | return NULL; | |
4645 | } | |
4646 | ||
fe978cb0 | 4647 | /* Search the symbol cache for an entry matching NAME and DOMAIN. |
3d9434b5 JB |
4648 | Return 1 if found, 0 otherwise. |
4649 | ||
4650 | If an entry was found and SYM is not NULL, set *SYM to the entry's | |
4651 | SYM. Same principle for BLOCK if not NULL. */ | |
96d887e8 | 4652 | |
96d887e8 | 4653 | static int |
fe978cb0 | 4654 | lookup_cached_symbol (const char *name, domain_enum domain, |
dda83cd7 | 4655 | struct symbol **sym, const struct block **block) |
96d887e8 | 4656 | { |
fe978cb0 | 4657 | struct cache_entry **e = find_entry (name, domain); |
3d9434b5 JB |
4658 | |
4659 | if (e == NULL) | |
4660 | return 0; | |
4661 | if (sym != NULL) | |
4662 | *sym = (*e)->sym; | |
4663 | if (block != NULL) | |
4664 | *block = (*e)->block; | |
4665 | return 1; | |
96d887e8 PH |
4666 | } |
4667 | ||
3d9434b5 | 4668 | /* Assuming that (SYM, BLOCK) is the result of the lookup of NAME |
fe978cb0 | 4669 | in domain DOMAIN, save this result in our symbol cache. */ |
3d9434b5 | 4670 | |
96d887e8 | 4671 | static void |
fe978cb0 | 4672 | cache_symbol (const char *name, domain_enum domain, struct symbol *sym, |
dda83cd7 | 4673 | const struct block *block) |
96d887e8 | 4674 | { |
ee01b665 JB |
4675 | struct ada_symbol_cache *sym_cache |
4676 | = ada_get_symbol_cache (current_program_space); | |
3d9434b5 | 4677 | int h; |
3d9434b5 JB |
4678 | struct cache_entry *e; |
4679 | ||
1994afbf DE |
4680 | /* Symbols for builtin types don't have a block. |
4681 | For now don't cache such symbols. */ | |
4682 | if (sym != NULL && !SYMBOL_OBJFILE_OWNED (sym)) | |
4683 | return; | |
4684 | ||
3d9434b5 JB |
4685 | /* If the symbol is a local symbol, then do not cache it, as a search |
4686 | for that symbol depends on the context. To determine whether | |
4687 | the symbol is local or not, we check the block where we found it | |
4688 | against the global and static blocks of its associated symtab. */ | |
4689 | if (sym | |
08be3fe3 | 4690 | && BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (symbol_symtab (sym)), |
439247b6 | 4691 | GLOBAL_BLOCK) != block |
08be3fe3 | 4692 | && BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (symbol_symtab (sym)), |
439247b6 | 4693 | STATIC_BLOCK) != block) |
3d9434b5 JB |
4694 | return; |
4695 | ||
4696 | h = msymbol_hash (name) % HASH_SIZE; | |
e39db4db | 4697 | e = XOBNEW (&sym_cache->cache_space, cache_entry); |
ee01b665 JB |
4698 | e->next = sym_cache->root[h]; |
4699 | sym_cache->root[h] = e; | |
2ef5453b | 4700 | e->name = obstack_strdup (&sym_cache->cache_space, name); |
3d9434b5 | 4701 | e->sym = sym; |
fe978cb0 | 4702 | e->domain = domain; |
3d9434b5 | 4703 | e->block = block; |
96d887e8 | 4704 | } |
4c4b4cd2 | 4705 | \f |
dda83cd7 | 4706 | /* Symbol Lookup */ |
4c4b4cd2 | 4707 | |
b5ec771e PA |
4708 | /* Return the symbol name match type that should be used used when |
4709 | searching for all symbols matching LOOKUP_NAME. | |
c0431670 JB |
4710 | |
4711 | LOOKUP_NAME is expected to be a symbol name after transformation | |
f98b2e33 | 4712 | for Ada lookups. */ |
c0431670 | 4713 | |
b5ec771e PA |
4714 | static symbol_name_match_type |
4715 | name_match_type_from_name (const char *lookup_name) | |
c0431670 | 4716 | { |
b5ec771e PA |
4717 | return (strstr (lookup_name, "__") == NULL |
4718 | ? symbol_name_match_type::WILD | |
4719 | : symbol_name_match_type::FULL); | |
c0431670 JB |
4720 | } |
4721 | ||
4c4b4cd2 PH |
4722 | /* Return the result of a standard (literal, C-like) lookup of NAME in |
4723 | given DOMAIN, visible from lexical block BLOCK. */ | |
4724 | ||
4725 | static struct symbol * | |
4726 | standard_lookup (const char *name, const struct block *block, | |
dda83cd7 | 4727 | domain_enum domain) |
4c4b4cd2 | 4728 | { |
acbd605d | 4729 | /* Initialize it just to avoid a GCC false warning. */ |
6640a367 | 4730 | struct block_symbol sym = {}; |
4c4b4cd2 | 4731 | |
d12307c1 PMR |
4732 | if (lookup_cached_symbol (name, domain, &sym.symbol, NULL)) |
4733 | return sym.symbol; | |
a2cd4f14 | 4734 | ada_lookup_encoded_symbol (name, block, domain, &sym); |
d12307c1 PMR |
4735 | cache_symbol (name, domain, sym.symbol, sym.block); |
4736 | return sym.symbol; | |
4c4b4cd2 PH |
4737 | } |
4738 | ||
4739 | ||
4740 | /* Non-zero iff there is at least one non-function/non-enumeral symbol | |
4741 | in the symbol fields of SYMS[0..N-1]. We treat enumerals as functions, | |
4742 | since they contend in overloading in the same way. */ | |
4743 | static int | |
d12307c1 | 4744 | is_nonfunction (struct block_symbol syms[], int n) |
4c4b4cd2 PH |
4745 | { |
4746 | int i; | |
4747 | ||
4748 | for (i = 0; i < n; i += 1) | |
78134374 | 4749 | if (SYMBOL_TYPE (syms[i].symbol)->code () != TYPE_CODE_FUNC |
dda83cd7 SM |
4750 | && (SYMBOL_TYPE (syms[i].symbol)->code () != TYPE_CODE_ENUM |
4751 | || SYMBOL_CLASS (syms[i].symbol) != LOC_CONST)) | |
14f9c5c9 AS |
4752 | return 1; |
4753 | ||
4754 | return 0; | |
4755 | } | |
4756 | ||
4757 | /* If true (non-zero), then TYPE0 and TYPE1 represent equivalent | |
4c4b4cd2 | 4758 | struct types. Otherwise, they may not. */ |
14f9c5c9 AS |
4759 | |
4760 | static int | |
d2e4a39e | 4761 | equiv_types (struct type *type0, struct type *type1) |
14f9c5c9 | 4762 | { |
d2e4a39e | 4763 | if (type0 == type1) |
14f9c5c9 | 4764 | return 1; |
d2e4a39e | 4765 | if (type0 == NULL || type1 == NULL |
78134374 | 4766 | || type0->code () != type1->code ()) |
14f9c5c9 | 4767 | return 0; |
78134374 SM |
4768 | if ((type0->code () == TYPE_CODE_STRUCT |
4769 | || type0->code () == TYPE_CODE_ENUM) | |
14f9c5c9 | 4770 | && ada_type_name (type0) != NULL && ada_type_name (type1) != NULL |
4c4b4cd2 | 4771 | && strcmp (ada_type_name (type0), ada_type_name (type1)) == 0) |
14f9c5c9 | 4772 | return 1; |
d2e4a39e | 4773 | |
14f9c5c9 AS |
4774 | return 0; |
4775 | } | |
4776 | ||
4777 | /* True iff SYM0 represents the same entity as SYM1, or one that is | |
4c4b4cd2 | 4778 | no more defined than that of SYM1. */ |
14f9c5c9 AS |
4779 | |
4780 | static int | |
d2e4a39e | 4781 | lesseq_defined_than (struct symbol *sym0, struct symbol *sym1) |
14f9c5c9 AS |
4782 | { |
4783 | if (sym0 == sym1) | |
4784 | return 1; | |
176620f1 | 4785 | if (SYMBOL_DOMAIN (sym0) != SYMBOL_DOMAIN (sym1) |
14f9c5c9 AS |
4786 | || SYMBOL_CLASS (sym0) != SYMBOL_CLASS (sym1)) |
4787 | return 0; | |
4788 | ||
d2e4a39e | 4789 | switch (SYMBOL_CLASS (sym0)) |
14f9c5c9 AS |
4790 | { |
4791 | case LOC_UNDEF: | |
4792 | return 1; | |
4793 | case LOC_TYPEDEF: | |
4794 | { | |
dda83cd7 SM |
4795 | struct type *type0 = SYMBOL_TYPE (sym0); |
4796 | struct type *type1 = SYMBOL_TYPE (sym1); | |
4797 | const char *name0 = sym0->linkage_name (); | |
4798 | const char *name1 = sym1->linkage_name (); | |
4799 | int len0 = strlen (name0); | |
4800 | ||
4801 | return | |
4802 | type0->code () == type1->code () | |
4803 | && (equiv_types (type0, type1) | |
4804 | || (len0 < strlen (name1) && strncmp (name0, name1, len0) == 0 | |
4805 | && startswith (name1 + len0, "___XV"))); | |
14f9c5c9 AS |
4806 | } |
4807 | case LOC_CONST: | |
4808 | return SYMBOL_VALUE (sym0) == SYMBOL_VALUE (sym1) | |
dda83cd7 | 4809 | && equiv_types (SYMBOL_TYPE (sym0), SYMBOL_TYPE (sym1)); |
4b610737 TT |
4810 | |
4811 | case LOC_STATIC: | |
4812 | { | |
dda83cd7 SM |
4813 | const char *name0 = sym0->linkage_name (); |
4814 | const char *name1 = sym1->linkage_name (); | |
4815 | return (strcmp (name0, name1) == 0 | |
4816 | && SYMBOL_VALUE_ADDRESS (sym0) == SYMBOL_VALUE_ADDRESS (sym1)); | |
4b610737 TT |
4817 | } |
4818 | ||
d2e4a39e AS |
4819 | default: |
4820 | return 0; | |
14f9c5c9 AS |
4821 | } |
4822 | } | |
4823 | ||
d12307c1 | 4824 | /* Append (SYM,BLOCK,SYMTAB) to the end of the array of struct block_symbol |
4c4b4cd2 | 4825 | records in OBSTACKP. Do nothing if SYM is a duplicate. */ |
14f9c5c9 AS |
4826 | |
4827 | static void | |
76a01679 | 4828 | add_defn_to_vec (struct obstack *obstackp, |
dda83cd7 SM |
4829 | struct symbol *sym, |
4830 | const struct block *block) | |
14f9c5c9 AS |
4831 | { |
4832 | int i; | |
d12307c1 | 4833 | struct block_symbol *prevDefns = defns_collected (obstackp, 0); |
14f9c5c9 | 4834 | |
529cad9c PH |
4835 | /* Do not try to complete stub types, as the debugger is probably |
4836 | already scanning all symbols matching a certain name at the | |
4837 | time when this function is called. Trying to replace the stub | |
4838 | type by its associated full type will cause us to restart a scan | |
4839 | which may lead to an infinite recursion. Instead, the client | |
4840 | collecting the matching symbols will end up collecting several | |
4841 | matches, with at least one of them complete. It can then filter | |
4842 | out the stub ones if needed. */ | |
4843 | ||
4c4b4cd2 PH |
4844 | for (i = num_defns_collected (obstackp) - 1; i >= 0; i -= 1) |
4845 | { | |
d12307c1 | 4846 | if (lesseq_defined_than (sym, prevDefns[i].symbol)) |
dda83cd7 | 4847 | return; |
d12307c1 | 4848 | else if (lesseq_defined_than (prevDefns[i].symbol, sym)) |
dda83cd7 SM |
4849 | { |
4850 | prevDefns[i].symbol = sym; | |
4851 | prevDefns[i].block = block; | |
4852 | return; | |
4853 | } | |
4c4b4cd2 PH |
4854 | } |
4855 | ||
4856 | { | |
d12307c1 | 4857 | struct block_symbol info; |
4c4b4cd2 | 4858 | |
d12307c1 | 4859 | info.symbol = sym; |
4c4b4cd2 | 4860 | info.block = block; |
d12307c1 | 4861 | obstack_grow (obstackp, &info, sizeof (struct block_symbol)); |
4c4b4cd2 PH |
4862 | } |
4863 | } | |
4864 | ||
d12307c1 PMR |
4865 | /* Number of block_symbol structures currently collected in current vector in |
4866 | OBSTACKP. */ | |
4c4b4cd2 | 4867 | |
76a01679 JB |
4868 | static int |
4869 | num_defns_collected (struct obstack *obstackp) | |
4c4b4cd2 | 4870 | { |
d12307c1 | 4871 | return obstack_object_size (obstackp) / sizeof (struct block_symbol); |
4c4b4cd2 PH |
4872 | } |
4873 | ||
d12307c1 PMR |
4874 | /* Vector of block_symbol structures currently collected in current vector in |
4875 | OBSTACKP. If FINISH, close off the vector and return its final address. */ | |
4c4b4cd2 | 4876 | |
d12307c1 | 4877 | static struct block_symbol * |
4c4b4cd2 PH |
4878 | defns_collected (struct obstack *obstackp, int finish) |
4879 | { | |
4880 | if (finish) | |
224c3ddb | 4881 | return (struct block_symbol *) obstack_finish (obstackp); |
4c4b4cd2 | 4882 | else |
d12307c1 | 4883 | return (struct block_symbol *) obstack_base (obstackp); |
4c4b4cd2 PH |
4884 | } |
4885 | ||
7c7b6655 TT |
4886 | /* Return a bound minimal symbol matching NAME according to Ada |
4887 | decoding rules. Returns an invalid symbol if there is no such | |
4888 | minimal symbol. Names prefixed with "standard__" are handled | |
4889 | specially: "standard__" is first stripped off, and only static and | |
4890 | global symbols are searched. */ | |
4c4b4cd2 | 4891 | |
7c7b6655 | 4892 | struct bound_minimal_symbol |
96d887e8 | 4893 | ada_lookup_simple_minsym (const char *name) |
4c4b4cd2 | 4894 | { |
7c7b6655 | 4895 | struct bound_minimal_symbol result; |
4c4b4cd2 | 4896 | |
7c7b6655 TT |
4897 | memset (&result, 0, sizeof (result)); |
4898 | ||
b5ec771e PA |
4899 | symbol_name_match_type match_type = name_match_type_from_name (name); |
4900 | lookup_name_info lookup_name (name, match_type); | |
4901 | ||
4902 | symbol_name_matcher_ftype *match_name | |
4903 | = ada_get_symbol_name_matcher (lookup_name); | |
4c4b4cd2 | 4904 | |
2030c079 | 4905 | for (objfile *objfile : current_program_space->objfiles ()) |
5325b9bf | 4906 | { |
7932255d | 4907 | for (minimal_symbol *msymbol : objfile->msymbols ()) |
5325b9bf | 4908 | { |
c9d95fa3 | 4909 | if (match_name (msymbol->linkage_name (), lookup_name, NULL) |
5325b9bf TT |
4910 | && MSYMBOL_TYPE (msymbol) != mst_solib_trampoline) |
4911 | { | |
4912 | result.minsym = msymbol; | |
4913 | result.objfile = objfile; | |
4914 | break; | |
4915 | } | |
4916 | } | |
4917 | } | |
4c4b4cd2 | 4918 | |
7c7b6655 | 4919 | return result; |
96d887e8 | 4920 | } |
4c4b4cd2 | 4921 | |
96d887e8 PH |
4922 | /* For all subprograms that statically enclose the subprogram of the |
4923 | selected frame, add symbols matching identifier NAME in DOMAIN | |
4924 | and their blocks to the list of data in OBSTACKP, as for | |
48b78332 JB |
4925 | ada_add_block_symbols (q.v.). If WILD_MATCH_P, treat as NAME |
4926 | with a wildcard prefix. */ | |
4c4b4cd2 | 4927 | |
96d887e8 PH |
4928 | static void |
4929 | add_symbols_from_enclosing_procs (struct obstack *obstackp, | |
b5ec771e PA |
4930 | const lookup_name_info &lookup_name, |
4931 | domain_enum domain) | |
96d887e8 | 4932 | { |
96d887e8 | 4933 | } |
14f9c5c9 | 4934 | |
96d887e8 PH |
4935 | /* True if TYPE is definitely an artificial type supplied to a symbol |
4936 | for which no debugging information was given in the symbol file. */ | |
14f9c5c9 | 4937 | |
96d887e8 PH |
4938 | static int |
4939 | is_nondebugging_type (struct type *type) | |
4940 | { | |
0d5cff50 | 4941 | const char *name = ada_type_name (type); |
5b4ee69b | 4942 | |
96d887e8 PH |
4943 | return (name != NULL && strcmp (name, "<variable, no debug info>") == 0); |
4944 | } | |
4c4b4cd2 | 4945 | |
8f17729f JB |
4946 | /* Return nonzero if TYPE1 and TYPE2 are two enumeration types |
4947 | that are deemed "identical" for practical purposes. | |
4948 | ||
4949 | This function assumes that TYPE1 and TYPE2 are both TYPE_CODE_ENUM | |
4950 | types and that their number of enumerals is identical (in other | |
1f704f76 | 4951 | words, type1->num_fields () == type2->num_fields ()). */ |
8f17729f JB |
4952 | |
4953 | static int | |
4954 | ada_identical_enum_types_p (struct type *type1, struct type *type2) | |
4955 | { | |
4956 | int i; | |
4957 | ||
4958 | /* The heuristic we use here is fairly conservative. We consider | |
4959 | that 2 enumerate types are identical if they have the same | |
4960 | number of enumerals and that all enumerals have the same | |
4961 | underlying value and name. */ | |
4962 | ||
4963 | /* All enums in the type should have an identical underlying value. */ | |
1f704f76 | 4964 | for (i = 0; i < type1->num_fields (); i++) |
14e75d8e | 4965 | if (TYPE_FIELD_ENUMVAL (type1, i) != TYPE_FIELD_ENUMVAL (type2, i)) |
8f17729f JB |
4966 | return 0; |
4967 | ||
4968 | /* All enumerals should also have the same name (modulo any numerical | |
4969 | suffix). */ | |
1f704f76 | 4970 | for (i = 0; i < type1->num_fields (); i++) |
8f17729f | 4971 | { |
0d5cff50 DE |
4972 | const char *name_1 = TYPE_FIELD_NAME (type1, i); |
4973 | const char *name_2 = TYPE_FIELD_NAME (type2, i); | |
8f17729f JB |
4974 | int len_1 = strlen (name_1); |
4975 | int len_2 = strlen (name_2); | |
4976 | ||
4977 | ada_remove_trailing_digits (TYPE_FIELD_NAME (type1, i), &len_1); | |
4978 | ada_remove_trailing_digits (TYPE_FIELD_NAME (type2, i), &len_2); | |
4979 | if (len_1 != len_2 | |
dda83cd7 | 4980 | || strncmp (TYPE_FIELD_NAME (type1, i), |
8f17729f JB |
4981 | TYPE_FIELD_NAME (type2, i), |
4982 | len_1) != 0) | |
4983 | return 0; | |
4984 | } | |
4985 | ||
4986 | return 1; | |
4987 | } | |
4988 | ||
4989 | /* Return nonzero if all the symbols in SYMS are all enumeral symbols | |
4990 | that are deemed "identical" for practical purposes. Sometimes, | |
4991 | enumerals are not strictly identical, but their types are so similar | |
4992 | that they can be considered identical. | |
4993 | ||
4994 | For instance, consider the following code: | |
4995 | ||
4996 | type Color is (Black, Red, Green, Blue, White); | |
4997 | type RGB_Color is new Color range Red .. Blue; | |
4998 | ||
4999 | Type RGB_Color is a subrange of an implicit type which is a copy | |
5000 | of type Color. If we call that implicit type RGB_ColorB ("B" is | |
5001 | for "Base Type"), then type RGB_ColorB is a copy of type Color. | |
5002 | As a result, when an expression references any of the enumeral | |
5003 | by name (Eg. "print green"), the expression is technically | |
5004 | ambiguous and the user should be asked to disambiguate. But | |
5005 | doing so would only hinder the user, since it wouldn't matter | |
5006 | what choice he makes, the outcome would always be the same. | |
5007 | So, for practical purposes, we consider them as the same. */ | |
5008 | ||
5009 | static int | |
54d343a2 | 5010 | symbols_are_identical_enums (const std::vector<struct block_symbol> &syms) |
8f17729f JB |
5011 | { |
5012 | int i; | |
5013 | ||
5014 | /* Before performing a thorough comparison check of each type, | |
5015 | we perform a series of inexpensive checks. We expect that these | |
5016 | checks will quickly fail in the vast majority of cases, and thus | |
5017 | help prevent the unnecessary use of a more expensive comparison. | |
5018 | Said comparison also expects us to make some of these checks | |
5019 | (see ada_identical_enum_types_p). */ | |
5020 | ||
5021 | /* Quick check: All symbols should have an enum type. */ | |
54d343a2 | 5022 | for (i = 0; i < syms.size (); i++) |
78134374 | 5023 | if (SYMBOL_TYPE (syms[i].symbol)->code () != TYPE_CODE_ENUM) |
8f17729f JB |
5024 | return 0; |
5025 | ||
5026 | /* Quick check: They should all have the same value. */ | |
54d343a2 | 5027 | for (i = 1; i < syms.size (); i++) |
d12307c1 | 5028 | if (SYMBOL_VALUE (syms[i].symbol) != SYMBOL_VALUE (syms[0].symbol)) |
8f17729f JB |
5029 | return 0; |
5030 | ||
5031 | /* Quick check: They should all have the same number of enumerals. */ | |
54d343a2 | 5032 | for (i = 1; i < syms.size (); i++) |
1f704f76 | 5033 | if (SYMBOL_TYPE (syms[i].symbol)->num_fields () |
dda83cd7 | 5034 | != SYMBOL_TYPE (syms[0].symbol)->num_fields ()) |
8f17729f JB |
5035 | return 0; |
5036 | ||
5037 | /* All the sanity checks passed, so we might have a set of | |
5038 | identical enumeration types. Perform a more complete | |
5039 | comparison of the type of each symbol. */ | |
54d343a2 | 5040 | for (i = 1; i < syms.size (); i++) |
d12307c1 | 5041 | if (!ada_identical_enum_types_p (SYMBOL_TYPE (syms[i].symbol), |
dda83cd7 | 5042 | SYMBOL_TYPE (syms[0].symbol))) |
8f17729f JB |
5043 | return 0; |
5044 | ||
5045 | return 1; | |
5046 | } | |
5047 | ||
54d343a2 | 5048 | /* Remove any non-debugging symbols in SYMS that definitely |
96d887e8 PH |
5049 | duplicate other symbols in the list (The only case I know of where |
5050 | this happens is when object files containing stabs-in-ecoff are | |
5051 | linked with files containing ordinary ecoff debugging symbols (or no | |
5052 | debugging symbols)). Modifies SYMS to squeeze out deleted entries. | |
5053 | Returns the number of items in the modified list. */ | |
4c4b4cd2 | 5054 | |
96d887e8 | 5055 | static int |
54d343a2 | 5056 | remove_extra_symbols (std::vector<struct block_symbol> *syms) |
96d887e8 PH |
5057 | { |
5058 | int i, j; | |
4c4b4cd2 | 5059 | |
8f17729f JB |
5060 | /* We should never be called with less than 2 symbols, as there |
5061 | cannot be any extra symbol in that case. But it's easy to | |
5062 | handle, since we have nothing to do in that case. */ | |
54d343a2 TT |
5063 | if (syms->size () < 2) |
5064 | return syms->size (); | |
8f17729f | 5065 | |
96d887e8 | 5066 | i = 0; |
54d343a2 | 5067 | while (i < syms->size ()) |
96d887e8 | 5068 | { |
a35ddb44 | 5069 | int remove_p = 0; |
339c13b6 JB |
5070 | |
5071 | /* If two symbols have the same name and one of them is a stub type, | |
dda83cd7 | 5072 | the get rid of the stub. */ |
339c13b6 | 5073 | |
e46d3488 | 5074 | if (SYMBOL_TYPE ((*syms)[i].symbol)->is_stub () |
dda83cd7 SM |
5075 | && (*syms)[i].symbol->linkage_name () != NULL) |
5076 | { | |
5077 | for (j = 0; j < syms->size (); j++) | |
5078 | { | |
5079 | if (j != i | |
5080 | && !SYMBOL_TYPE ((*syms)[j].symbol)->is_stub () | |
5081 | && (*syms)[j].symbol->linkage_name () != NULL | |
5082 | && strcmp ((*syms)[i].symbol->linkage_name (), | |
5083 | (*syms)[j].symbol->linkage_name ()) == 0) | |
5084 | remove_p = 1; | |
5085 | } | |
5086 | } | |
339c13b6 JB |
5087 | |
5088 | /* Two symbols with the same name, same class and same address | |
dda83cd7 | 5089 | should be identical. */ |
339c13b6 | 5090 | |
987012b8 | 5091 | else if ((*syms)[i].symbol->linkage_name () != NULL |
dda83cd7 SM |
5092 | && SYMBOL_CLASS ((*syms)[i].symbol) == LOC_STATIC |
5093 | && is_nondebugging_type (SYMBOL_TYPE ((*syms)[i].symbol))) | |
5094 | { | |
5095 | for (j = 0; j < syms->size (); j += 1) | |
5096 | { | |
5097 | if (i != j | |
5098 | && (*syms)[j].symbol->linkage_name () != NULL | |
5099 | && strcmp ((*syms)[i].symbol->linkage_name (), | |
5100 | (*syms)[j].symbol->linkage_name ()) == 0 | |
5101 | && SYMBOL_CLASS ((*syms)[i].symbol) | |
54d343a2 | 5102 | == SYMBOL_CLASS ((*syms)[j].symbol) |
dda83cd7 SM |
5103 | && SYMBOL_VALUE_ADDRESS ((*syms)[i].symbol) |
5104 | == SYMBOL_VALUE_ADDRESS ((*syms)[j].symbol)) | |
5105 | remove_p = 1; | |
5106 | } | |
5107 | } | |
339c13b6 | 5108 | |
a35ddb44 | 5109 | if (remove_p) |
54d343a2 | 5110 | syms->erase (syms->begin () + i); |
1b788fb6 TT |
5111 | else |
5112 | i += 1; | |
14f9c5c9 | 5113 | } |
8f17729f JB |
5114 | |
5115 | /* If all the remaining symbols are identical enumerals, then | |
5116 | just keep the first one and discard the rest. | |
5117 | ||
5118 | Unlike what we did previously, we do not discard any entry | |
5119 | unless they are ALL identical. This is because the symbol | |
5120 | comparison is not a strict comparison, but rather a practical | |
5121 | comparison. If all symbols are considered identical, then | |
5122 | we can just go ahead and use the first one and discard the rest. | |
5123 | But if we cannot reduce the list to a single element, we have | |
5124 | to ask the user to disambiguate anyways. And if we have to | |
5125 | present a multiple-choice menu, it's less confusing if the list | |
5126 | isn't missing some choices that were identical and yet distinct. */ | |
54d343a2 TT |
5127 | if (symbols_are_identical_enums (*syms)) |
5128 | syms->resize (1); | |
8f17729f | 5129 | |
54d343a2 | 5130 | return syms->size (); |
14f9c5c9 AS |
5131 | } |
5132 | ||
96d887e8 PH |
5133 | /* Given a type that corresponds to a renaming entity, use the type name |
5134 | to extract the scope (package name or function name, fully qualified, | |
5135 | and following the GNAT encoding convention) where this renaming has been | |
49d83361 | 5136 | defined. */ |
4c4b4cd2 | 5137 | |
49d83361 | 5138 | static std::string |
96d887e8 | 5139 | xget_renaming_scope (struct type *renaming_type) |
14f9c5c9 | 5140 | { |
96d887e8 | 5141 | /* The renaming types adhere to the following convention: |
0963b4bd | 5142 | <scope>__<rename>___<XR extension>. |
96d887e8 PH |
5143 | So, to extract the scope, we search for the "___XR" extension, |
5144 | and then backtrack until we find the first "__". */ | |
76a01679 | 5145 | |
7d93a1e0 | 5146 | const char *name = renaming_type->name (); |
108d56a4 SM |
5147 | const char *suffix = strstr (name, "___XR"); |
5148 | const char *last; | |
14f9c5c9 | 5149 | |
96d887e8 PH |
5150 | /* Now, backtrack a bit until we find the first "__". Start looking |
5151 | at suffix - 3, as the <rename> part is at least one character long. */ | |
14f9c5c9 | 5152 | |
96d887e8 PH |
5153 | for (last = suffix - 3; last > name; last--) |
5154 | if (last[0] == '_' && last[1] == '_') | |
5155 | break; | |
76a01679 | 5156 | |
96d887e8 | 5157 | /* Make a copy of scope and return it. */ |
49d83361 | 5158 | return std::string (name, last); |
4c4b4cd2 PH |
5159 | } |
5160 | ||
96d887e8 | 5161 | /* Return nonzero if NAME corresponds to a package name. */ |
4c4b4cd2 | 5162 | |
96d887e8 PH |
5163 | static int |
5164 | is_package_name (const char *name) | |
4c4b4cd2 | 5165 | { |
96d887e8 PH |
5166 | /* Here, We take advantage of the fact that no symbols are generated |
5167 | for packages, while symbols are generated for each function. | |
5168 | So the condition for NAME represent a package becomes equivalent | |
5169 | to NAME not existing in our list of symbols. There is only one | |
5170 | small complication with library-level functions (see below). */ | |
4c4b4cd2 | 5171 | |
96d887e8 PH |
5172 | /* If it is a function that has not been defined at library level, |
5173 | then we should be able to look it up in the symbols. */ | |
5174 | if (standard_lookup (name, NULL, VAR_DOMAIN) != NULL) | |
5175 | return 0; | |
14f9c5c9 | 5176 | |
96d887e8 PH |
5177 | /* Library-level function names start with "_ada_". See if function |
5178 | "_ada_" followed by NAME can be found. */ | |
14f9c5c9 | 5179 | |
96d887e8 | 5180 | /* Do a quick check that NAME does not contain "__", since library-level |
e1d5a0d2 | 5181 | functions names cannot contain "__" in them. */ |
96d887e8 PH |
5182 | if (strstr (name, "__") != NULL) |
5183 | return 0; | |
4c4b4cd2 | 5184 | |
528e1572 | 5185 | std::string fun_name = string_printf ("_ada_%s", name); |
14f9c5c9 | 5186 | |
528e1572 | 5187 | return (standard_lookup (fun_name.c_str (), NULL, VAR_DOMAIN) == NULL); |
96d887e8 | 5188 | } |
14f9c5c9 | 5189 | |
96d887e8 | 5190 | /* Return nonzero if SYM corresponds to a renaming entity that is |
aeb5907d | 5191 | not visible from FUNCTION_NAME. */ |
14f9c5c9 | 5192 | |
96d887e8 | 5193 | static int |
0d5cff50 | 5194 | old_renaming_is_invisible (const struct symbol *sym, const char *function_name) |
96d887e8 | 5195 | { |
aeb5907d JB |
5196 | if (SYMBOL_CLASS (sym) != LOC_TYPEDEF) |
5197 | return 0; | |
5198 | ||
49d83361 | 5199 | std::string scope = xget_renaming_scope (SYMBOL_TYPE (sym)); |
14f9c5c9 | 5200 | |
96d887e8 | 5201 | /* If the rename has been defined in a package, then it is visible. */ |
49d83361 TT |
5202 | if (is_package_name (scope.c_str ())) |
5203 | return 0; | |
14f9c5c9 | 5204 | |
96d887e8 PH |
5205 | /* Check that the rename is in the current function scope by checking |
5206 | that its name starts with SCOPE. */ | |
76a01679 | 5207 | |
96d887e8 PH |
5208 | /* If the function name starts with "_ada_", it means that it is |
5209 | a library-level function. Strip this prefix before doing the | |
5210 | comparison, as the encoding for the renaming does not contain | |
5211 | this prefix. */ | |
61012eef | 5212 | if (startswith (function_name, "_ada_")) |
96d887e8 | 5213 | function_name += 5; |
f26caa11 | 5214 | |
49d83361 | 5215 | return !startswith (function_name, scope.c_str ()); |
f26caa11 PH |
5216 | } |
5217 | ||
aeb5907d JB |
5218 | /* Remove entries from SYMS that corresponds to a renaming entity that |
5219 | is not visible from the function associated with CURRENT_BLOCK or | |
5220 | that is superfluous due to the presence of more specific renaming | |
5221 | information. Places surviving symbols in the initial entries of | |
5222 | SYMS and returns the number of surviving symbols. | |
96d887e8 PH |
5223 | |
5224 | Rationale: | |
aeb5907d JB |
5225 | First, in cases where an object renaming is implemented as a |
5226 | reference variable, GNAT may produce both the actual reference | |
5227 | variable and the renaming encoding. In this case, we discard the | |
5228 | latter. | |
5229 | ||
5230 | Second, GNAT emits a type following a specified encoding for each renaming | |
96d887e8 PH |
5231 | entity. Unfortunately, STABS currently does not support the definition |
5232 | of types that are local to a given lexical block, so all renamings types | |
5233 | are emitted at library level. As a consequence, if an application | |
5234 | contains two renaming entities using the same name, and a user tries to | |
5235 | print the value of one of these entities, the result of the ada symbol | |
5236 | lookup will also contain the wrong renaming type. | |
f26caa11 | 5237 | |
96d887e8 PH |
5238 | This function partially covers for this limitation by attempting to |
5239 | remove from the SYMS list renaming symbols that should be visible | |
5240 | from CURRENT_BLOCK. However, there does not seem be a 100% reliable | |
5241 | method with the current information available. The implementation | |
5242 | below has a couple of limitations (FIXME: brobecker-2003-05-12): | |
5243 | ||
5244 | - When the user tries to print a rename in a function while there | |
dda83cd7 SM |
5245 | is another rename entity defined in a package: Normally, the |
5246 | rename in the function has precedence over the rename in the | |
5247 | package, so the latter should be removed from the list. This is | |
5248 | currently not the case. | |
5249 | ||
96d887e8 | 5250 | - This function will incorrectly remove valid renames if |
dda83cd7 SM |
5251 | the CURRENT_BLOCK corresponds to a function which symbol name |
5252 | has been changed by an "Export" pragma. As a consequence, | |
5253 | the user will be unable to print such rename entities. */ | |
4c4b4cd2 | 5254 | |
14f9c5c9 | 5255 | static int |
54d343a2 TT |
5256 | remove_irrelevant_renamings (std::vector<struct block_symbol> *syms, |
5257 | const struct block *current_block) | |
4c4b4cd2 PH |
5258 | { |
5259 | struct symbol *current_function; | |
0d5cff50 | 5260 | const char *current_function_name; |
4c4b4cd2 | 5261 | int i; |
aeb5907d JB |
5262 | int is_new_style_renaming; |
5263 | ||
5264 | /* If there is both a renaming foo___XR... encoded as a variable and | |
5265 | a simple variable foo in the same block, discard the latter. | |
0963b4bd | 5266 | First, zero out such symbols, then compress. */ |
aeb5907d | 5267 | is_new_style_renaming = 0; |
54d343a2 | 5268 | for (i = 0; i < syms->size (); i += 1) |
aeb5907d | 5269 | { |
54d343a2 TT |
5270 | struct symbol *sym = (*syms)[i].symbol; |
5271 | const struct block *block = (*syms)[i].block; | |
aeb5907d JB |
5272 | const char *name; |
5273 | const char *suffix; | |
5274 | ||
5275 | if (sym == NULL || SYMBOL_CLASS (sym) == LOC_TYPEDEF) | |
5276 | continue; | |
987012b8 | 5277 | name = sym->linkage_name (); |
aeb5907d JB |
5278 | suffix = strstr (name, "___XR"); |
5279 | ||
5280 | if (suffix != NULL) | |
5281 | { | |
5282 | int name_len = suffix - name; | |
5283 | int j; | |
5b4ee69b | 5284 | |
aeb5907d | 5285 | is_new_style_renaming = 1; |
54d343a2 TT |
5286 | for (j = 0; j < syms->size (); j += 1) |
5287 | if (i != j && (*syms)[j].symbol != NULL | |
987012b8 | 5288 | && strncmp (name, (*syms)[j].symbol->linkage_name (), |
aeb5907d | 5289 | name_len) == 0 |
54d343a2 TT |
5290 | && block == (*syms)[j].block) |
5291 | (*syms)[j].symbol = NULL; | |
aeb5907d JB |
5292 | } |
5293 | } | |
5294 | if (is_new_style_renaming) | |
5295 | { | |
5296 | int j, k; | |
5297 | ||
54d343a2 TT |
5298 | for (j = k = 0; j < syms->size (); j += 1) |
5299 | if ((*syms)[j].symbol != NULL) | |
aeb5907d | 5300 | { |
54d343a2 | 5301 | (*syms)[k] = (*syms)[j]; |
aeb5907d JB |
5302 | k += 1; |
5303 | } | |
5304 | return k; | |
5305 | } | |
4c4b4cd2 PH |
5306 | |
5307 | /* Extract the function name associated to CURRENT_BLOCK. | |
5308 | Abort if unable to do so. */ | |
76a01679 | 5309 | |
4c4b4cd2 | 5310 | if (current_block == NULL) |
54d343a2 | 5311 | return syms->size (); |
76a01679 | 5312 | |
7f0df278 | 5313 | current_function = block_linkage_function (current_block); |
4c4b4cd2 | 5314 | if (current_function == NULL) |
54d343a2 | 5315 | return syms->size (); |
4c4b4cd2 | 5316 | |
987012b8 | 5317 | current_function_name = current_function->linkage_name (); |
4c4b4cd2 | 5318 | if (current_function_name == NULL) |
54d343a2 | 5319 | return syms->size (); |
4c4b4cd2 PH |
5320 | |
5321 | /* Check each of the symbols, and remove it from the list if it is | |
5322 | a type corresponding to a renaming that is out of the scope of | |
5323 | the current block. */ | |
5324 | ||
5325 | i = 0; | |
54d343a2 | 5326 | while (i < syms->size ()) |
4c4b4cd2 | 5327 | { |
54d343a2 | 5328 | if (ada_parse_renaming ((*syms)[i].symbol, NULL, NULL, NULL) |
dda83cd7 SM |
5329 | == ADA_OBJECT_RENAMING |
5330 | && old_renaming_is_invisible ((*syms)[i].symbol, | |
54d343a2 TT |
5331 | current_function_name)) |
5332 | syms->erase (syms->begin () + i); | |
4c4b4cd2 | 5333 | else |
dda83cd7 | 5334 | i += 1; |
4c4b4cd2 PH |
5335 | } |
5336 | ||
54d343a2 | 5337 | return syms->size (); |
4c4b4cd2 PH |
5338 | } |
5339 | ||
339c13b6 JB |
5340 | /* Add to OBSTACKP all symbols from BLOCK (and its super-blocks) |
5341 | whose name and domain match NAME and DOMAIN respectively. | |
5342 | If no match was found, then extend the search to "enclosing" | |
5343 | routines (in other words, if we're inside a nested function, | |
5344 | search the symbols defined inside the enclosing functions). | |
d0a8ab18 JB |
5345 | If WILD_MATCH_P is nonzero, perform the naming matching in |
5346 | "wild" mode (see function "wild_match" for more info). | |
339c13b6 JB |
5347 | |
5348 | Note: This function assumes that OBSTACKP has 0 (zero) element in it. */ | |
5349 | ||
5350 | static void | |
b5ec771e PA |
5351 | ada_add_local_symbols (struct obstack *obstackp, |
5352 | const lookup_name_info &lookup_name, | |
5353 | const struct block *block, domain_enum domain) | |
339c13b6 JB |
5354 | { |
5355 | int block_depth = 0; | |
5356 | ||
5357 | while (block != NULL) | |
5358 | { | |
5359 | block_depth += 1; | |
b5ec771e | 5360 | ada_add_block_symbols (obstackp, block, lookup_name, domain, NULL); |
339c13b6 JB |
5361 | |
5362 | /* If we found a non-function match, assume that's the one. */ | |
5363 | if (is_nonfunction (defns_collected (obstackp, 0), | |
dda83cd7 SM |
5364 | num_defns_collected (obstackp))) |
5365 | return; | |
339c13b6 JB |
5366 | |
5367 | block = BLOCK_SUPERBLOCK (block); | |
5368 | } | |
5369 | ||
5370 | /* If no luck so far, try to find NAME as a local symbol in some lexically | |
5371 | enclosing subprogram. */ | |
5372 | if (num_defns_collected (obstackp) == 0 && block_depth > 2) | |
b5ec771e | 5373 | add_symbols_from_enclosing_procs (obstackp, lookup_name, domain); |
339c13b6 JB |
5374 | } |
5375 | ||
ccefe4c4 | 5376 | /* An object of this type is used as the user_data argument when |
40658b94 | 5377 | calling the map_matching_symbols method. */ |
ccefe4c4 | 5378 | |
40658b94 | 5379 | struct match_data |
ccefe4c4 | 5380 | { |
40658b94 | 5381 | struct objfile *objfile; |
ccefe4c4 | 5382 | struct obstack *obstackp; |
40658b94 PH |
5383 | struct symbol *arg_sym; |
5384 | int found_sym; | |
ccefe4c4 TT |
5385 | }; |
5386 | ||
199b4314 TT |
5387 | /* A callback for add_nonlocal_symbols that adds symbol, found in BSYM, |
5388 | to a list of symbols. DATA is a pointer to a struct match_data * | |
40658b94 PH |
5389 | containing the obstack that collects the symbol list, the file that SYM |
5390 | must come from, a flag indicating whether a non-argument symbol has | |
5391 | been found in the current block, and the last argument symbol | |
5392 | passed in SYM within the current block (if any). When SYM is null, | |
5393 | marking the end of a block, the argument symbol is added if no | |
5394 | other has been found. */ | |
ccefe4c4 | 5395 | |
199b4314 TT |
5396 | static bool |
5397 | aux_add_nonlocal_symbols (struct block_symbol *bsym, | |
5398 | struct match_data *data) | |
ccefe4c4 | 5399 | { |
199b4314 TT |
5400 | const struct block *block = bsym->block; |
5401 | struct symbol *sym = bsym->symbol; | |
5402 | ||
40658b94 PH |
5403 | if (sym == NULL) |
5404 | { | |
5405 | if (!data->found_sym && data->arg_sym != NULL) | |
5406 | add_defn_to_vec (data->obstackp, | |
5407 | fixup_symbol_section (data->arg_sym, data->objfile), | |
5408 | block); | |
5409 | data->found_sym = 0; | |
5410 | data->arg_sym = NULL; | |
5411 | } | |
5412 | else | |
5413 | { | |
5414 | if (SYMBOL_CLASS (sym) == LOC_UNRESOLVED) | |
199b4314 | 5415 | return true; |
40658b94 PH |
5416 | else if (SYMBOL_IS_ARGUMENT (sym)) |
5417 | data->arg_sym = sym; | |
5418 | else | |
5419 | { | |
5420 | data->found_sym = 1; | |
5421 | add_defn_to_vec (data->obstackp, | |
5422 | fixup_symbol_section (sym, data->objfile), | |
5423 | block); | |
5424 | } | |
5425 | } | |
199b4314 | 5426 | return true; |
40658b94 PH |
5427 | } |
5428 | ||
b5ec771e PA |
5429 | /* Helper for add_nonlocal_symbols. Find symbols in DOMAIN which are |
5430 | targeted by renamings matching LOOKUP_NAME in BLOCK. Add these | |
5431 | symbols to OBSTACKP. Return whether we found such symbols. */ | |
22cee43f PMR |
5432 | |
5433 | static int | |
5434 | ada_add_block_renamings (struct obstack *obstackp, | |
5435 | const struct block *block, | |
b5ec771e PA |
5436 | const lookup_name_info &lookup_name, |
5437 | domain_enum domain) | |
22cee43f PMR |
5438 | { |
5439 | struct using_direct *renaming; | |
5440 | int defns_mark = num_defns_collected (obstackp); | |
5441 | ||
b5ec771e PA |
5442 | symbol_name_matcher_ftype *name_match |
5443 | = ada_get_symbol_name_matcher (lookup_name); | |
5444 | ||
22cee43f PMR |
5445 | for (renaming = block_using (block); |
5446 | renaming != NULL; | |
5447 | renaming = renaming->next) | |
5448 | { | |
5449 | const char *r_name; | |
22cee43f PMR |
5450 | |
5451 | /* Avoid infinite recursions: skip this renaming if we are actually | |
5452 | already traversing it. | |
5453 | ||
5454 | Currently, symbol lookup in Ada don't use the namespace machinery from | |
5455 | C++/Fortran support: skip namespace imports that use them. */ | |
5456 | if (renaming->searched | |
5457 | || (renaming->import_src != NULL | |
5458 | && renaming->import_src[0] != '\0') | |
5459 | || (renaming->import_dest != NULL | |
5460 | && renaming->import_dest[0] != '\0')) | |
5461 | continue; | |
5462 | renaming->searched = 1; | |
5463 | ||
5464 | /* TODO: here, we perform another name-based symbol lookup, which can | |
5465 | pull its own multiple overloads. In theory, we should be able to do | |
5466 | better in this case since, in DWARF, DW_AT_import is a DIE reference, | |
5467 | not a simple name. But in order to do this, we would need to enhance | |
5468 | the DWARF reader to associate a symbol to this renaming, instead of a | |
5469 | name. So, for now, we do something simpler: re-use the C++/Fortran | |
5470 | namespace machinery. */ | |
5471 | r_name = (renaming->alias != NULL | |
5472 | ? renaming->alias | |
5473 | : renaming->declaration); | |
b5ec771e PA |
5474 | if (name_match (r_name, lookup_name, NULL)) |
5475 | { | |
5476 | lookup_name_info decl_lookup_name (renaming->declaration, | |
5477 | lookup_name.match_type ()); | |
5478 | ada_add_all_symbols (obstackp, block, decl_lookup_name, domain, | |
5479 | 1, NULL); | |
5480 | } | |
22cee43f PMR |
5481 | renaming->searched = 0; |
5482 | } | |
5483 | return num_defns_collected (obstackp) != defns_mark; | |
5484 | } | |
5485 | ||
db230ce3 JB |
5486 | /* Implements compare_names, but only applying the comparision using |
5487 | the given CASING. */ | |
5b4ee69b | 5488 | |
40658b94 | 5489 | static int |
db230ce3 JB |
5490 | compare_names_with_case (const char *string1, const char *string2, |
5491 | enum case_sensitivity casing) | |
40658b94 PH |
5492 | { |
5493 | while (*string1 != '\0' && *string2 != '\0') | |
5494 | { | |
db230ce3 JB |
5495 | char c1, c2; |
5496 | ||
40658b94 PH |
5497 | if (isspace (*string1) || isspace (*string2)) |
5498 | return strcmp_iw_ordered (string1, string2); | |
db230ce3 JB |
5499 | |
5500 | if (casing == case_sensitive_off) | |
5501 | { | |
5502 | c1 = tolower (*string1); | |
5503 | c2 = tolower (*string2); | |
5504 | } | |
5505 | else | |
5506 | { | |
5507 | c1 = *string1; | |
5508 | c2 = *string2; | |
5509 | } | |
5510 | if (c1 != c2) | |
40658b94 | 5511 | break; |
db230ce3 | 5512 | |
40658b94 PH |
5513 | string1 += 1; |
5514 | string2 += 1; | |
5515 | } | |
db230ce3 | 5516 | |
40658b94 PH |
5517 | switch (*string1) |
5518 | { | |
5519 | case '(': | |
5520 | return strcmp_iw_ordered (string1, string2); | |
5521 | case '_': | |
5522 | if (*string2 == '\0') | |
5523 | { | |
052874e8 | 5524 | if (is_name_suffix (string1)) |
40658b94 PH |
5525 | return 0; |
5526 | else | |
1a1d5513 | 5527 | return 1; |
40658b94 | 5528 | } |
dbb8534f | 5529 | /* FALLTHROUGH */ |
40658b94 PH |
5530 | default: |
5531 | if (*string2 == '(') | |
5532 | return strcmp_iw_ordered (string1, string2); | |
5533 | else | |
db230ce3 JB |
5534 | { |
5535 | if (casing == case_sensitive_off) | |
5536 | return tolower (*string1) - tolower (*string2); | |
5537 | else | |
5538 | return *string1 - *string2; | |
5539 | } | |
40658b94 | 5540 | } |
ccefe4c4 TT |
5541 | } |
5542 | ||
db230ce3 JB |
5543 | /* Compare STRING1 to STRING2, with results as for strcmp. |
5544 | Compatible with strcmp_iw_ordered in that... | |
5545 | ||
5546 | strcmp_iw_ordered (STRING1, STRING2) <= 0 | |
5547 | ||
5548 | ... implies... | |
5549 | ||
5550 | compare_names (STRING1, STRING2) <= 0 | |
5551 | ||
5552 | (they may differ as to what symbols compare equal). */ | |
5553 | ||
5554 | static int | |
5555 | compare_names (const char *string1, const char *string2) | |
5556 | { | |
5557 | int result; | |
5558 | ||
5559 | /* Similar to what strcmp_iw_ordered does, we need to perform | |
5560 | a case-insensitive comparison first, and only resort to | |
5561 | a second, case-sensitive, comparison if the first one was | |
5562 | not sufficient to differentiate the two strings. */ | |
5563 | ||
5564 | result = compare_names_with_case (string1, string2, case_sensitive_off); | |
5565 | if (result == 0) | |
5566 | result = compare_names_with_case (string1, string2, case_sensitive_on); | |
5567 | ||
5568 | return result; | |
5569 | } | |
5570 | ||
b5ec771e PA |
5571 | /* Convenience function to get at the Ada encoded lookup name for |
5572 | LOOKUP_NAME, as a C string. */ | |
5573 | ||
5574 | static const char * | |
5575 | ada_lookup_name (const lookup_name_info &lookup_name) | |
5576 | { | |
5577 | return lookup_name.ada ().lookup_name ().c_str (); | |
5578 | } | |
5579 | ||
339c13b6 | 5580 | /* Add to OBSTACKP all non-local symbols whose name and domain match |
b5ec771e PA |
5581 | LOOKUP_NAME and DOMAIN respectively. The search is performed on |
5582 | GLOBAL_BLOCK symbols if GLOBAL is non-zero, or on STATIC_BLOCK | |
5583 | symbols otherwise. */ | |
339c13b6 JB |
5584 | |
5585 | static void | |
b5ec771e PA |
5586 | add_nonlocal_symbols (struct obstack *obstackp, |
5587 | const lookup_name_info &lookup_name, | |
5588 | domain_enum domain, int global) | |
339c13b6 | 5589 | { |
40658b94 | 5590 | struct match_data data; |
339c13b6 | 5591 | |
6475f2fe | 5592 | memset (&data, 0, sizeof data); |
ccefe4c4 | 5593 | data.obstackp = obstackp; |
339c13b6 | 5594 | |
b5ec771e PA |
5595 | bool is_wild_match = lookup_name.ada ().wild_match_p (); |
5596 | ||
199b4314 TT |
5597 | auto callback = [&] (struct block_symbol *bsym) |
5598 | { | |
5599 | return aux_add_nonlocal_symbols (bsym, &data); | |
5600 | }; | |
5601 | ||
2030c079 | 5602 | for (objfile *objfile : current_program_space->objfiles ()) |
40658b94 PH |
5603 | { |
5604 | data.objfile = objfile; | |
5605 | ||
b054970d TT |
5606 | objfile->sf->qf->map_matching_symbols (objfile, lookup_name, |
5607 | domain, global, callback, | |
5608 | (is_wild_match | |
5609 | ? NULL : compare_names)); | |
22cee43f | 5610 | |
b669c953 | 5611 | for (compunit_symtab *cu : objfile->compunits ()) |
22cee43f PMR |
5612 | { |
5613 | const struct block *global_block | |
5614 | = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cu), GLOBAL_BLOCK); | |
5615 | ||
b5ec771e PA |
5616 | if (ada_add_block_renamings (obstackp, global_block, lookup_name, |
5617 | domain)) | |
22cee43f PMR |
5618 | data.found_sym = 1; |
5619 | } | |
40658b94 PH |
5620 | } |
5621 | ||
5622 | if (num_defns_collected (obstackp) == 0 && global && !is_wild_match) | |
5623 | { | |
b5ec771e | 5624 | const char *name = ada_lookup_name (lookup_name); |
e0802d59 TT |
5625 | std::string bracket_name = std::string ("<_ada_") + name + '>'; |
5626 | lookup_name_info name1 (bracket_name, symbol_name_match_type::FULL); | |
b5ec771e | 5627 | |
2030c079 | 5628 | for (objfile *objfile : current_program_space->objfiles ()) |
dda83cd7 | 5629 | { |
40658b94 | 5630 | data.objfile = objfile; |
b054970d | 5631 | objfile->sf->qf->map_matching_symbols (objfile, name1, |
199b4314 | 5632 | domain, global, callback, |
b5ec771e | 5633 | compare_names); |
40658b94 PH |
5634 | } |
5635 | } | |
339c13b6 JB |
5636 | } |
5637 | ||
b5ec771e PA |
5638 | /* Find symbols in DOMAIN matching LOOKUP_NAME, in BLOCK and, if |
5639 | FULL_SEARCH is non-zero, enclosing scope and in global scopes, | |
5640 | returning the number of matches. Add these to OBSTACKP. | |
4eeaa230 | 5641 | |
22cee43f PMR |
5642 | When FULL_SEARCH is non-zero, any non-function/non-enumeral |
5643 | symbol match within the nest of blocks whose innermost member is BLOCK, | |
4c4b4cd2 | 5644 | is the one match returned (no other matches in that or |
d9680e73 | 5645 | enclosing blocks is returned). If there are any matches in or |
22cee43f | 5646 | surrounding BLOCK, then these alone are returned. |
4eeaa230 | 5647 | |
b5ec771e PA |
5648 | Names prefixed with "standard__" are handled specially: |
5649 | "standard__" is first stripped off (by the lookup_name | |
5650 | constructor), and only static and global symbols are searched. | |
14f9c5c9 | 5651 | |
22cee43f PMR |
5652 | If MADE_GLOBAL_LOOKUP_P is non-null, set it before return to whether we had |
5653 | to lookup global symbols. */ | |
5654 | ||
5655 | static void | |
5656 | ada_add_all_symbols (struct obstack *obstackp, | |
5657 | const struct block *block, | |
b5ec771e | 5658 | const lookup_name_info &lookup_name, |
22cee43f PMR |
5659 | domain_enum domain, |
5660 | int full_search, | |
5661 | int *made_global_lookup_p) | |
14f9c5c9 AS |
5662 | { |
5663 | struct symbol *sym; | |
14f9c5c9 | 5664 | |
22cee43f PMR |
5665 | if (made_global_lookup_p) |
5666 | *made_global_lookup_p = 0; | |
339c13b6 JB |
5667 | |
5668 | /* Special case: If the user specifies a symbol name inside package | |
5669 | Standard, do a non-wild matching of the symbol name without | |
5670 | the "standard__" prefix. This was primarily introduced in order | |
5671 | to allow the user to specifically access the standard exceptions | |
5672 | using, for instance, Standard.Constraint_Error when Constraint_Error | |
5673 | is ambiguous (due to the user defining its own Constraint_Error | |
5674 | entity inside its program). */ | |
b5ec771e PA |
5675 | if (lookup_name.ada ().standard_p ()) |
5676 | block = NULL; | |
4c4b4cd2 | 5677 | |
339c13b6 | 5678 | /* Check the non-global symbols. If we have ANY match, then we're done. */ |
14f9c5c9 | 5679 | |
4eeaa230 DE |
5680 | if (block != NULL) |
5681 | { | |
5682 | if (full_search) | |
b5ec771e | 5683 | ada_add_local_symbols (obstackp, lookup_name, block, domain); |
4eeaa230 DE |
5684 | else |
5685 | { | |
5686 | /* In the !full_search case we're are being called by | |
4009ee92 | 5687 | iterate_over_symbols, and we don't want to search |
4eeaa230 | 5688 | superblocks. */ |
b5ec771e | 5689 | ada_add_block_symbols (obstackp, block, lookup_name, domain, NULL); |
4eeaa230 | 5690 | } |
22cee43f PMR |
5691 | if (num_defns_collected (obstackp) > 0 || !full_search) |
5692 | return; | |
4eeaa230 | 5693 | } |
d2e4a39e | 5694 | |
339c13b6 JB |
5695 | /* No non-global symbols found. Check our cache to see if we have |
5696 | already performed this search before. If we have, then return | |
5697 | the same result. */ | |
5698 | ||
b5ec771e PA |
5699 | if (lookup_cached_symbol (ada_lookup_name (lookup_name), |
5700 | domain, &sym, &block)) | |
4c4b4cd2 PH |
5701 | { |
5702 | if (sym != NULL) | |
b5ec771e | 5703 | add_defn_to_vec (obstackp, sym, block); |
22cee43f | 5704 | return; |
4c4b4cd2 | 5705 | } |
14f9c5c9 | 5706 | |
22cee43f PMR |
5707 | if (made_global_lookup_p) |
5708 | *made_global_lookup_p = 1; | |
b1eedac9 | 5709 | |
339c13b6 JB |
5710 | /* Search symbols from all global blocks. */ |
5711 | ||
b5ec771e | 5712 | add_nonlocal_symbols (obstackp, lookup_name, domain, 1); |
d2e4a39e | 5713 | |
4c4b4cd2 | 5714 | /* Now add symbols from all per-file blocks if we've gotten no hits |
339c13b6 | 5715 | (not strictly correct, but perhaps better than an error). */ |
d2e4a39e | 5716 | |
22cee43f | 5717 | if (num_defns_collected (obstackp) == 0) |
b5ec771e | 5718 | add_nonlocal_symbols (obstackp, lookup_name, domain, 0); |
22cee43f PMR |
5719 | } |
5720 | ||
b5ec771e PA |
5721 | /* Find symbols in DOMAIN matching LOOKUP_NAME, in BLOCK and, if FULL_SEARCH |
5722 | is non-zero, enclosing scope and in global scopes, returning the number of | |
22cee43f | 5723 | matches. |
54d343a2 TT |
5724 | Fills *RESULTS with (SYM,BLOCK) tuples, indicating the symbols |
5725 | found and the blocks and symbol tables (if any) in which they were | |
5726 | found. | |
22cee43f PMR |
5727 | |
5728 | When full_search is non-zero, any non-function/non-enumeral | |
5729 | symbol match within the nest of blocks whose innermost member is BLOCK, | |
5730 | is the one match returned (no other matches in that or | |
5731 | enclosing blocks is returned). If there are any matches in or | |
5732 | surrounding BLOCK, then these alone are returned. | |
5733 | ||
5734 | Names prefixed with "standard__" are handled specially: "standard__" | |
5735 | is first stripped off, and only static and global symbols are searched. */ | |
5736 | ||
5737 | static int | |
b5ec771e PA |
5738 | ada_lookup_symbol_list_worker (const lookup_name_info &lookup_name, |
5739 | const struct block *block, | |
22cee43f | 5740 | domain_enum domain, |
54d343a2 | 5741 | std::vector<struct block_symbol> *results, |
22cee43f PMR |
5742 | int full_search) |
5743 | { | |
22cee43f PMR |
5744 | int syms_from_global_search; |
5745 | int ndefns; | |
ec6a20c2 | 5746 | auto_obstack obstack; |
22cee43f | 5747 | |
ec6a20c2 | 5748 | ada_add_all_symbols (&obstack, block, lookup_name, |
b5ec771e | 5749 | domain, full_search, &syms_from_global_search); |
14f9c5c9 | 5750 | |
ec6a20c2 JB |
5751 | ndefns = num_defns_collected (&obstack); |
5752 | ||
54d343a2 TT |
5753 | struct block_symbol *base = defns_collected (&obstack, 1); |
5754 | for (int i = 0; i < ndefns; ++i) | |
5755 | results->push_back (base[i]); | |
4c4b4cd2 | 5756 | |
54d343a2 | 5757 | ndefns = remove_extra_symbols (results); |
4c4b4cd2 | 5758 | |
b1eedac9 | 5759 | if (ndefns == 0 && full_search && syms_from_global_search) |
b5ec771e | 5760 | cache_symbol (ada_lookup_name (lookup_name), domain, NULL, NULL); |
14f9c5c9 | 5761 | |
b1eedac9 | 5762 | if (ndefns == 1 && full_search && syms_from_global_search) |
b5ec771e PA |
5763 | cache_symbol (ada_lookup_name (lookup_name), domain, |
5764 | (*results)[0].symbol, (*results)[0].block); | |
14f9c5c9 | 5765 | |
54d343a2 | 5766 | ndefns = remove_irrelevant_renamings (results, block); |
ec6a20c2 | 5767 | |
14f9c5c9 AS |
5768 | return ndefns; |
5769 | } | |
5770 | ||
b5ec771e | 5771 | /* Find symbols in DOMAIN matching NAME, in BLOCK and enclosing scope and |
54d343a2 TT |
5772 | in global scopes, returning the number of matches, and filling *RESULTS |
5773 | with (SYM,BLOCK) tuples. | |
ec6a20c2 | 5774 | |
4eeaa230 DE |
5775 | See ada_lookup_symbol_list_worker for further details. */ |
5776 | ||
5777 | int | |
b5ec771e | 5778 | ada_lookup_symbol_list (const char *name, const struct block *block, |
54d343a2 TT |
5779 | domain_enum domain, |
5780 | std::vector<struct block_symbol> *results) | |
4eeaa230 | 5781 | { |
b5ec771e PA |
5782 | symbol_name_match_type name_match_type = name_match_type_from_name (name); |
5783 | lookup_name_info lookup_name (name, name_match_type); | |
5784 | ||
5785 | return ada_lookup_symbol_list_worker (lookup_name, block, domain, results, 1); | |
4eeaa230 DE |
5786 | } |
5787 | ||
4e5c77fe JB |
5788 | /* The result is as for ada_lookup_symbol_list with FULL_SEARCH set |
5789 | to 1, but choosing the first symbol found if there are multiple | |
5790 | choices. | |
5791 | ||
5e2336be JB |
5792 | The result is stored in *INFO, which must be non-NULL. |
5793 | If no match is found, INFO->SYM is set to NULL. */ | |
4e5c77fe JB |
5794 | |
5795 | void | |
5796 | ada_lookup_encoded_symbol (const char *name, const struct block *block, | |
fe978cb0 | 5797 | domain_enum domain, |
d12307c1 | 5798 | struct block_symbol *info) |
14f9c5c9 | 5799 | { |
b5ec771e PA |
5800 | /* Since we already have an encoded name, wrap it in '<>' to force a |
5801 | verbatim match. Otherwise, if the name happens to not look like | |
5802 | an encoded name (because it doesn't include a "__"), | |
5803 | ada_lookup_name_info would re-encode/fold it again, and that | |
5804 | would e.g., incorrectly lowercase object renaming names like | |
5805 | "R28b" -> "r28b". */ | |
5806 | std::string verbatim = std::string ("<") + name + '>'; | |
5807 | ||
5e2336be | 5808 | gdb_assert (info != NULL); |
65392b3e | 5809 | *info = ada_lookup_symbol (verbatim.c_str (), block, domain); |
4e5c77fe | 5810 | } |
aeb5907d JB |
5811 | |
5812 | /* Return a symbol in DOMAIN matching NAME, in BLOCK0 and enclosing | |
5813 | scope and in global scopes, or NULL if none. NAME is folded and | |
5814 | encoded first. Otherwise, the result is as for ada_lookup_symbol_list, | |
65392b3e | 5815 | choosing the first symbol if there are multiple choices. */ |
4e5c77fe | 5816 | |
d12307c1 | 5817 | struct block_symbol |
aeb5907d | 5818 | ada_lookup_symbol (const char *name, const struct block *block0, |
dda83cd7 | 5819 | domain_enum domain) |
aeb5907d | 5820 | { |
54d343a2 | 5821 | std::vector<struct block_symbol> candidates; |
f98fc17b | 5822 | int n_candidates; |
f98fc17b PA |
5823 | |
5824 | n_candidates = ada_lookup_symbol_list (name, block0, domain, &candidates); | |
f98fc17b PA |
5825 | |
5826 | if (n_candidates == 0) | |
54d343a2 | 5827 | return {}; |
f98fc17b PA |
5828 | |
5829 | block_symbol info = candidates[0]; | |
5830 | info.symbol = fixup_symbol_section (info.symbol, NULL); | |
d12307c1 | 5831 | return info; |
4c4b4cd2 | 5832 | } |
14f9c5c9 | 5833 | |
14f9c5c9 | 5834 | |
4c4b4cd2 PH |
5835 | /* True iff STR is a possible encoded suffix of a normal Ada name |
5836 | that is to be ignored for matching purposes. Suffixes of parallel | |
5837 | names (e.g., XVE) are not included here. Currently, the possible suffixes | |
5823c3ef | 5838 | are given by any of the regular expressions: |
4c4b4cd2 | 5839 | |
babe1480 JB |
5840 | [.$][0-9]+ [nested subprogram suffix, on platforms such as GNU/Linux] |
5841 | ___[0-9]+ [nested subprogram suffix, on platforms such as HP/UX] | |
9ac7f98e | 5842 | TKB [subprogram suffix for task bodies] |
babe1480 | 5843 | _E[0-9]+[bs]$ [protected object entry suffixes] |
61ee279c | 5844 | (X[nb]*)?((\$|__)[0-9](_?[0-9]+)|___(JM|LJM|X([FDBUP].*|R[^T]?)))?$ |
babe1480 JB |
5845 | |
5846 | Also, any leading "__[0-9]+" sequence is skipped before the suffix | |
5847 | match is performed. This sequence is used to differentiate homonyms, | |
5848 | is an optional part of a valid name suffix. */ | |
4c4b4cd2 | 5849 | |
14f9c5c9 | 5850 | static int |
d2e4a39e | 5851 | is_name_suffix (const char *str) |
14f9c5c9 AS |
5852 | { |
5853 | int k; | |
4c4b4cd2 PH |
5854 | const char *matching; |
5855 | const int len = strlen (str); | |
5856 | ||
babe1480 JB |
5857 | /* Skip optional leading __[0-9]+. */ |
5858 | ||
4c4b4cd2 PH |
5859 | if (len > 3 && str[0] == '_' && str[1] == '_' && isdigit (str[2])) |
5860 | { | |
babe1480 JB |
5861 | str += 3; |
5862 | while (isdigit (str[0])) | |
dda83cd7 | 5863 | str += 1; |
4c4b4cd2 | 5864 | } |
babe1480 JB |
5865 | |
5866 | /* [.$][0-9]+ */ | |
4c4b4cd2 | 5867 | |
babe1480 | 5868 | if (str[0] == '.' || str[0] == '$') |
4c4b4cd2 | 5869 | { |
babe1480 | 5870 | matching = str + 1; |
4c4b4cd2 | 5871 | while (isdigit (matching[0])) |
dda83cd7 | 5872 | matching += 1; |
4c4b4cd2 | 5873 | if (matching[0] == '\0') |
dda83cd7 | 5874 | return 1; |
4c4b4cd2 PH |
5875 | } |
5876 | ||
5877 | /* ___[0-9]+ */ | |
babe1480 | 5878 | |
4c4b4cd2 PH |
5879 | if (len > 3 && str[0] == '_' && str[1] == '_' && str[2] == '_') |
5880 | { | |
5881 | matching = str + 3; | |
5882 | while (isdigit (matching[0])) | |
dda83cd7 | 5883 | matching += 1; |
4c4b4cd2 | 5884 | if (matching[0] == '\0') |
dda83cd7 | 5885 | return 1; |
4c4b4cd2 PH |
5886 | } |
5887 | ||
9ac7f98e JB |
5888 | /* "TKB" suffixes are used for subprograms implementing task bodies. */ |
5889 | ||
5890 | if (strcmp (str, "TKB") == 0) | |
5891 | return 1; | |
5892 | ||
529cad9c PH |
5893 | #if 0 |
5894 | /* FIXME: brobecker/2005-09-23: Protected Object subprograms end | |
0963b4bd MS |
5895 | with a N at the end. Unfortunately, the compiler uses the same |
5896 | convention for other internal types it creates. So treating | |
529cad9c | 5897 | all entity names that end with an "N" as a name suffix causes |
0963b4bd MS |
5898 | some regressions. For instance, consider the case of an enumerated |
5899 | type. To support the 'Image attribute, it creates an array whose | |
529cad9c PH |
5900 | name ends with N. |
5901 | Having a single character like this as a suffix carrying some | |
0963b4bd | 5902 | information is a bit risky. Perhaps we should change the encoding |
529cad9c PH |
5903 | to be something like "_N" instead. In the meantime, do not do |
5904 | the following check. */ | |
5905 | /* Protected Object Subprograms */ | |
5906 | if (len == 1 && str [0] == 'N') | |
5907 | return 1; | |
5908 | #endif | |
5909 | ||
5910 | /* _E[0-9]+[bs]$ */ | |
5911 | if (len > 3 && str[0] == '_' && str [1] == 'E' && isdigit (str[2])) | |
5912 | { | |
5913 | matching = str + 3; | |
5914 | while (isdigit (matching[0])) | |
dda83cd7 | 5915 | matching += 1; |
529cad9c | 5916 | if ((matching[0] == 'b' || matching[0] == 's') |
dda83cd7 SM |
5917 | && matching [1] == '\0') |
5918 | return 1; | |
529cad9c PH |
5919 | } |
5920 | ||
4c4b4cd2 PH |
5921 | /* ??? We should not modify STR directly, as we are doing below. This |
5922 | is fine in this case, but may become problematic later if we find | |
5923 | that this alternative did not work, and want to try matching | |
5924 | another one from the begining of STR. Since we modified it, we | |
5925 | won't be able to find the begining of the string anymore! */ | |
14f9c5c9 AS |
5926 | if (str[0] == 'X') |
5927 | { | |
5928 | str += 1; | |
d2e4a39e | 5929 | while (str[0] != '_' && str[0] != '\0') |
dda83cd7 SM |
5930 | { |
5931 | if (str[0] != 'n' && str[0] != 'b') | |
5932 | return 0; | |
5933 | str += 1; | |
5934 | } | |
14f9c5c9 | 5935 | } |
babe1480 | 5936 | |
14f9c5c9 AS |
5937 | if (str[0] == '\000') |
5938 | return 1; | |
babe1480 | 5939 | |
d2e4a39e | 5940 | if (str[0] == '_') |
14f9c5c9 AS |
5941 | { |
5942 | if (str[1] != '_' || str[2] == '\000') | |
dda83cd7 | 5943 | return 0; |
d2e4a39e | 5944 | if (str[2] == '_') |
dda83cd7 SM |
5945 | { |
5946 | if (strcmp (str + 3, "JM") == 0) | |
5947 | return 1; | |
5948 | /* FIXME: brobecker/2004-09-30: GNAT will soon stop using | |
5949 | the LJM suffix in favor of the JM one. But we will | |
5950 | still accept LJM as a valid suffix for a reasonable | |
5951 | amount of time, just to allow ourselves to debug programs | |
5952 | compiled using an older version of GNAT. */ | |
5953 | if (strcmp (str + 3, "LJM") == 0) | |
5954 | return 1; | |
5955 | if (str[3] != 'X') | |
5956 | return 0; | |
5957 | if (str[4] == 'F' || str[4] == 'D' || str[4] == 'B' | |
5958 | || str[4] == 'U' || str[4] == 'P') | |
5959 | return 1; | |
5960 | if (str[4] == 'R' && str[5] != 'T') | |
5961 | return 1; | |
5962 | return 0; | |
5963 | } | |
4c4b4cd2 | 5964 | if (!isdigit (str[2])) |
dda83cd7 | 5965 | return 0; |
4c4b4cd2 | 5966 | for (k = 3; str[k] != '\0'; k += 1) |
dda83cd7 SM |
5967 | if (!isdigit (str[k]) && str[k] != '_') |
5968 | return 0; | |
14f9c5c9 AS |
5969 | return 1; |
5970 | } | |
4c4b4cd2 | 5971 | if (str[0] == '$' && isdigit (str[1])) |
14f9c5c9 | 5972 | { |
4c4b4cd2 | 5973 | for (k = 2; str[k] != '\0'; k += 1) |
dda83cd7 SM |
5974 | if (!isdigit (str[k]) && str[k] != '_') |
5975 | return 0; | |
14f9c5c9 AS |
5976 | return 1; |
5977 | } | |
5978 | return 0; | |
5979 | } | |
d2e4a39e | 5980 | |
aeb5907d JB |
5981 | /* Return non-zero if the string starting at NAME and ending before |
5982 | NAME_END contains no capital letters. */ | |
529cad9c PH |
5983 | |
5984 | static int | |
5985 | is_valid_name_for_wild_match (const char *name0) | |
5986 | { | |
f945dedf | 5987 | std::string decoded_name = ada_decode (name0); |
529cad9c PH |
5988 | int i; |
5989 | ||
5823c3ef JB |
5990 | /* If the decoded name starts with an angle bracket, it means that |
5991 | NAME0 does not follow the GNAT encoding format. It should then | |
5992 | not be allowed as a possible wild match. */ | |
5993 | if (decoded_name[0] == '<') | |
5994 | return 0; | |
5995 | ||
529cad9c PH |
5996 | for (i=0; decoded_name[i] != '\0'; i++) |
5997 | if (isalpha (decoded_name[i]) && !islower (decoded_name[i])) | |
5998 | return 0; | |
5999 | ||
6000 | return 1; | |
6001 | } | |
6002 | ||
59c8a30b JB |
6003 | /* Advance *NAMEP to next occurrence in the string NAME0 of the TARGET0 |
6004 | character which could start a simple name. Assumes that *NAMEP points | |
6005 | somewhere inside the string beginning at NAME0. */ | |
4c4b4cd2 | 6006 | |
14f9c5c9 | 6007 | static int |
59c8a30b | 6008 | advance_wild_match (const char **namep, const char *name0, char target0) |
14f9c5c9 | 6009 | { |
73589123 | 6010 | const char *name = *namep; |
5b4ee69b | 6011 | |
5823c3ef | 6012 | while (1) |
14f9c5c9 | 6013 | { |
59c8a30b | 6014 | char t0, t1; |
73589123 PH |
6015 | |
6016 | t0 = *name; | |
6017 | if (t0 == '_') | |
6018 | { | |
6019 | t1 = name[1]; | |
6020 | if ((t1 >= 'a' && t1 <= 'z') || (t1 >= '0' && t1 <= '9')) | |
6021 | { | |
6022 | name += 1; | |
61012eef | 6023 | if (name == name0 + 5 && startswith (name0, "_ada")) |
73589123 PH |
6024 | break; |
6025 | else | |
6026 | name += 1; | |
6027 | } | |
aa27d0b3 JB |
6028 | else if (t1 == '_' && ((name[2] >= 'a' && name[2] <= 'z') |
6029 | || name[2] == target0)) | |
73589123 PH |
6030 | { |
6031 | name += 2; | |
6032 | break; | |
6033 | } | |
6034 | else | |
6035 | return 0; | |
6036 | } | |
6037 | else if ((t0 >= 'a' && t0 <= 'z') || (t0 >= '0' && t0 <= '9')) | |
6038 | name += 1; | |
6039 | else | |
5823c3ef | 6040 | return 0; |
73589123 PH |
6041 | } |
6042 | ||
6043 | *namep = name; | |
6044 | return 1; | |
6045 | } | |
6046 | ||
b5ec771e PA |
6047 | /* Return true iff NAME encodes a name of the form prefix.PATN. |
6048 | Ignores any informational suffixes of NAME (i.e., for which | |
6049 | is_name_suffix is true). Assumes that PATN is a lower-cased Ada | |
6050 | simple name. */ | |
73589123 | 6051 | |
b5ec771e | 6052 | static bool |
73589123 PH |
6053 | wild_match (const char *name, const char *patn) |
6054 | { | |
22e048c9 | 6055 | const char *p; |
73589123 PH |
6056 | const char *name0 = name; |
6057 | ||
6058 | while (1) | |
6059 | { | |
6060 | const char *match = name; | |
6061 | ||
6062 | if (*name == *patn) | |
6063 | { | |
6064 | for (name += 1, p = patn + 1; *p != '\0'; name += 1, p += 1) | |
6065 | if (*p != *name) | |
6066 | break; | |
6067 | if (*p == '\0' && is_name_suffix (name)) | |
b5ec771e | 6068 | return match == name0 || is_valid_name_for_wild_match (name0); |
73589123 PH |
6069 | |
6070 | if (name[-1] == '_') | |
6071 | name -= 1; | |
6072 | } | |
6073 | if (!advance_wild_match (&name, name0, *patn)) | |
b5ec771e | 6074 | return false; |
96d887e8 | 6075 | } |
96d887e8 PH |
6076 | } |
6077 | ||
b5ec771e PA |
6078 | /* Returns true iff symbol name SYM_NAME matches SEARCH_NAME, ignoring |
6079 | any trailing suffixes that encode debugging information or leading | |
6080 | _ada_ on SYM_NAME (see is_name_suffix commentary for the debugging | |
6081 | information that is ignored). */ | |
40658b94 | 6082 | |
b5ec771e | 6083 | static bool |
c4d840bd PH |
6084 | full_match (const char *sym_name, const char *search_name) |
6085 | { | |
b5ec771e PA |
6086 | size_t search_name_len = strlen (search_name); |
6087 | ||
6088 | if (strncmp (sym_name, search_name, search_name_len) == 0 | |
6089 | && is_name_suffix (sym_name + search_name_len)) | |
6090 | return true; | |
6091 | ||
6092 | if (startswith (sym_name, "_ada_") | |
6093 | && strncmp (sym_name + 5, search_name, search_name_len) == 0 | |
6094 | && is_name_suffix (sym_name + search_name_len + 5)) | |
6095 | return true; | |
c4d840bd | 6096 | |
b5ec771e PA |
6097 | return false; |
6098 | } | |
c4d840bd | 6099 | |
b5ec771e PA |
6100 | /* Add symbols from BLOCK matching LOOKUP_NAME in DOMAIN to vector |
6101 | *defn_symbols, updating the list of symbols in OBSTACKP (if | |
6102 | necessary). OBJFILE is the section containing BLOCK. */ | |
96d887e8 PH |
6103 | |
6104 | static void | |
6105 | ada_add_block_symbols (struct obstack *obstackp, | |
b5ec771e PA |
6106 | const struct block *block, |
6107 | const lookup_name_info &lookup_name, | |
6108 | domain_enum domain, struct objfile *objfile) | |
96d887e8 | 6109 | { |
8157b174 | 6110 | struct block_iterator iter; |
96d887e8 PH |
6111 | /* A matching argument symbol, if any. */ |
6112 | struct symbol *arg_sym; | |
6113 | /* Set true when we find a matching non-argument symbol. */ | |
6114 | int found_sym; | |
6115 | struct symbol *sym; | |
6116 | ||
6117 | arg_sym = NULL; | |
6118 | found_sym = 0; | |
b5ec771e PA |
6119 | for (sym = block_iter_match_first (block, lookup_name, &iter); |
6120 | sym != NULL; | |
6121 | sym = block_iter_match_next (lookup_name, &iter)) | |
96d887e8 | 6122 | { |
c1b5c1eb | 6123 | if (symbol_matches_domain (sym->language (), SYMBOL_DOMAIN (sym), domain)) |
b5ec771e PA |
6124 | { |
6125 | if (SYMBOL_CLASS (sym) != LOC_UNRESOLVED) | |
6126 | { | |
6127 | if (SYMBOL_IS_ARGUMENT (sym)) | |
6128 | arg_sym = sym; | |
6129 | else | |
6130 | { | |
6131 | found_sym = 1; | |
6132 | add_defn_to_vec (obstackp, | |
6133 | fixup_symbol_section (sym, objfile), | |
6134 | block); | |
6135 | } | |
6136 | } | |
6137 | } | |
96d887e8 PH |
6138 | } |
6139 | ||
22cee43f PMR |
6140 | /* Handle renamings. */ |
6141 | ||
b5ec771e | 6142 | if (ada_add_block_renamings (obstackp, block, lookup_name, domain)) |
22cee43f PMR |
6143 | found_sym = 1; |
6144 | ||
96d887e8 PH |
6145 | if (!found_sym && arg_sym != NULL) |
6146 | { | |
76a01679 | 6147 | add_defn_to_vec (obstackp, |
dda83cd7 SM |
6148 | fixup_symbol_section (arg_sym, objfile), |
6149 | block); | |
96d887e8 PH |
6150 | } |
6151 | ||
b5ec771e | 6152 | if (!lookup_name.ada ().wild_match_p ()) |
96d887e8 PH |
6153 | { |
6154 | arg_sym = NULL; | |
6155 | found_sym = 0; | |
b5ec771e PA |
6156 | const std::string &ada_lookup_name = lookup_name.ada ().lookup_name (); |
6157 | const char *name = ada_lookup_name.c_str (); | |
6158 | size_t name_len = ada_lookup_name.size (); | |
96d887e8 PH |
6159 | |
6160 | ALL_BLOCK_SYMBOLS (block, iter, sym) | |
76a01679 | 6161 | { |
dda83cd7 SM |
6162 | if (symbol_matches_domain (sym->language (), |
6163 | SYMBOL_DOMAIN (sym), domain)) | |
6164 | { | |
6165 | int cmp; | |
6166 | ||
6167 | cmp = (int) '_' - (int) sym->linkage_name ()[0]; | |
6168 | if (cmp == 0) | |
6169 | { | |
6170 | cmp = !startswith (sym->linkage_name (), "_ada_"); | |
6171 | if (cmp == 0) | |
6172 | cmp = strncmp (name, sym->linkage_name () + 5, | |
6173 | name_len); | |
6174 | } | |
6175 | ||
6176 | if (cmp == 0 | |
6177 | && is_name_suffix (sym->linkage_name () + name_len + 5)) | |
6178 | { | |
2a2d4dc3 AS |
6179 | if (SYMBOL_CLASS (sym) != LOC_UNRESOLVED) |
6180 | { | |
6181 | if (SYMBOL_IS_ARGUMENT (sym)) | |
6182 | arg_sym = sym; | |
6183 | else | |
6184 | { | |
6185 | found_sym = 1; | |
6186 | add_defn_to_vec (obstackp, | |
6187 | fixup_symbol_section (sym, objfile), | |
6188 | block); | |
6189 | } | |
6190 | } | |
dda83cd7 SM |
6191 | } |
6192 | } | |
76a01679 | 6193 | } |
96d887e8 PH |
6194 | |
6195 | /* NOTE: This really shouldn't be needed for _ada_ symbols. | |
dda83cd7 | 6196 | They aren't parameters, right? */ |
96d887e8 | 6197 | if (!found_sym && arg_sym != NULL) |
dda83cd7 SM |
6198 | { |
6199 | add_defn_to_vec (obstackp, | |
6200 | fixup_symbol_section (arg_sym, objfile), | |
6201 | block); | |
6202 | } | |
96d887e8 PH |
6203 | } |
6204 | } | |
6205 | \f | |
41d27058 | 6206 | |
dda83cd7 | 6207 | /* Symbol Completion */ |
41d27058 | 6208 | |
b5ec771e | 6209 | /* See symtab.h. */ |
41d27058 | 6210 | |
b5ec771e PA |
6211 | bool |
6212 | ada_lookup_name_info::matches | |
6213 | (const char *sym_name, | |
6214 | symbol_name_match_type match_type, | |
a207cff2 | 6215 | completion_match_result *comp_match_res) const |
41d27058 | 6216 | { |
b5ec771e PA |
6217 | bool match = false; |
6218 | const char *text = m_encoded_name.c_str (); | |
6219 | size_t text_len = m_encoded_name.size (); | |
41d27058 JB |
6220 | |
6221 | /* First, test against the fully qualified name of the symbol. */ | |
6222 | ||
6223 | if (strncmp (sym_name, text, text_len) == 0) | |
b5ec771e | 6224 | match = true; |
41d27058 | 6225 | |
f945dedf | 6226 | std::string decoded_name = ada_decode (sym_name); |
b5ec771e | 6227 | if (match && !m_encoded_p) |
41d27058 JB |
6228 | { |
6229 | /* One needed check before declaring a positive match is to verify | |
dda83cd7 SM |
6230 | that iff we are doing a verbatim match, the decoded version |
6231 | of the symbol name starts with '<'. Otherwise, this symbol name | |
6232 | is not a suitable completion. */ | |
41d27058 | 6233 | |
f945dedf | 6234 | bool has_angle_bracket = (decoded_name[0] == '<'); |
b5ec771e | 6235 | match = (has_angle_bracket == m_verbatim_p); |
41d27058 JB |
6236 | } |
6237 | ||
b5ec771e | 6238 | if (match && !m_verbatim_p) |
41d27058 JB |
6239 | { |
6240 | /* When doing non-verbatim match, another check that needs to | |
dda83cd7 SM |
6241 | be done is to verify that the potentially matching symbol name |
6242 | does not include capital letters, because the ada-mode would | |
6243 | not be able to understand these symbol names without the | |
6244 | angle bracket notation. */ | |
41d27058 JB |
6245 | const char *tmp; |
6246 | ||
6247 | for (tmp = sym_name; *tmp != '\0' && !isupper (*tmp); tmp++); | |
6248 | if (*tmp != '\0') | |
b5ec771e | 6249 | match = false; |
41d27058 JB |
6250 | } |
6251 | ||
6252 | /* Second: Try wild matching... */ | |
6253 | ||
b5ec771e | 6254 | if (!match && m_wild_match_p) |
41d27058 JB |
6255 | { |
6256 | /* Since we are doing wild matching, this means that TEXT | |
dda83cd7 SM |
6257 | may represent an unqualified symbol name. We therefore must |
6258 | also compare TEXT against the unqualified name of the symbol. */ | |
f945dedf | 6259 | sym_name = ada_unqualified_name (decoded_name.c_str ()); |
41d27058 JB |
6260 | |
6261 | if (strncmp (sym_name, text, text_len) == 0) | |
b5ec771e | 6262 | match = true; |
41d27058 JB |
6263 | } |
6264 | ||
b5ec771e | 6265 | /* Finally: If we found a match, prepare the result to return. */ |
41d27058 JB |
6266 | |
6267 | if (!match) | |
b5ec771e | 6268 | return false; |
41d27058 | 6269 | |
a207cff2 | 6270 | if (comp_match_res != NULL) |
b5ec771e | 6271 | { |
a207cff2 | 6272 | std::string &match_str = comp_match_res->match.storage (); |
41d27058 | 6273 | |
b5ec771e | 6274 | if (!m_encoded_p) |
a207cff2 | 6275 | match_str = ada_decode (sym_name); |
b5ec771e PA |
6276 | else |
6277 | { | |
6278 | if (m_verbatim_p) | |
6279 | match_str = add_angle_brackets (sym_name); | |
6280 | else | |
6281 | match_str = sym_name; | |
41d27058 | 6282 | |
b5ec771e | 6283 | } |
a207cff2 PA |
6284 | |
6285 | comp_match_res->set_match (match_str.c_str ()); | |
41d27058 JB |
6286 | } |
6287 | ||
b5ec771e | 6288 | return true; |
41d27058 JB |
6289 | } |
6290 | ||
dda83cd7 | 6291 | /* Field Access */ |
96d887e8 | 6292 | |
73fb9985 JB |
6293 | /* Return non-zero if TYPE is a pointer to the GNAT dispatch table used |
6294 | for tagged types. */ | |
6295 | ||
6296 | static int | |
6297 | ada_is_dispatch_table_ptr_type (struct type *type) | |
6298 | { | |
0d5cff50 | 6299 | const char *name; |
73fb9985 | 6300 | |
78134374 | 6301 | if (type->code () != TYPE_CODE_PTR) |
73fb9985 JB |
6302 | return 0; |
6303 | ||
7d93a1e0 | 6304 | name = TYPE_TARGET_TYPE (type)->name (); |
73fb9985 JB |
6305 | if (name == NULL) |
6306 | return 0; | |
6307 | ||
6308 | return (strcmp (name, "ada__tags__dispatch_table") == 0); | |
6309 | } | |
6310 | ||
ac4a2da4 JG |
6311 | /* Return non-zero if TYPE is an interface tag. */ |
6312 | ||
6313 | static int | |
6314 | ada_is_interface_tag (struct type *type) | |
6315 | { | |
7d93a1e0 | 6316 | const char *name = type->name (); |
ac4a2da4 JG |
6317 | |
6318 | if (name == NULL) | |
6319 | return 0; | |
6320 | ||
6321 | return (strcmp (name, "ada__tags__interface_tag") == 0); | |
6322 | } | |
6323 | ||
963a6417 PH |
6324 | /* True if field number FIELD_NUM in struct or union type TYPE is supposed |
6325 | to be invisible to users. */ | |
96d887e8 | 6326 | |
963a6417 PH |
6327 | int |
6328 | ada_is_ignored_field (struct type *type, int field_num) | |
96d887e8 | 6329 | { |
1f704f76 | 6330 | if (field_num < 0 || field_num > type->num_fields ()) |
963a6417 | 6331 | return 1; |
ffde82bf | 6332 | |
73fb9985 JB |
6333 | /* Check the name of that field. */ |
6334 | { | |
6335 | const char *name = TYPE_FIELD_NAME (type, field_num); | |
6336 | ||
6337 | /* Anonymous field names should not be printed. | |
6338 | brobecker/2007-02-20: I don't think this can actually happen | |
30baf67b | 6339 | but we don't want to print the value of anonymous fields anyway. */ |
73fb9985 JB |
6340 | if (name == NULL) |
6341 | return 1; | |
6342 | ||
ffde82bf JB |
6343 | /* Normally, fields whose name start with an underscore ("_") |
6344 | are fields that have been internally generated by the compiler, | |
6345 | and thus should not be printed. The "_parent" field is special, | |
6346 | however: This is a field internally generated by the compiler | |
6347 | for tagged types, and it contains the components inherited from | |
6348 | the parent type. This field should not be printed as is, but | |
6349 | should not be ignored either. */ | |
61012eef | 6350 | if (name[0] == '_' && !startswith (name, "_parent")) |
73fb9985 JB |
6351 | return 1; |
6352 | } | |
6353 | ||
ac4a2da4 JG |
6354 | /* If this is the dispatch table of a tagged type or an interface tag, |
6355 | then ignore. */ | |
73fb9985 | 6356 | if (ada_is_tagged_type (type, 1) |
940da03e SM |
6357 | && (ada_is_dispatch_table_ptr_type (type->field (field_num).type ()) |
6358 | || ada_is_interface_tag (type->field (field_num).type ()))) | |
73fb9985 JB |
6359 | return 1; |
6360 | ||
6361 | /* Not a special field, so it should not be ignored. */ | |
6362 | return 0; | |
963a6417 | 6363 | } |
96d887e8 | 6364 | |
963a6417 | 6365 | /* True iff TYPE has a tag field. If REFOK, then TYPE may also be a |
0963b4bd | 6366 | pointer or reference type whose ultimate target has a tag field. */ |
96d887e8 | 6367 | |
963a6417 PH |
6368 | int |
6369 | ada_is_tagged_type (struct type *type, int refok) | |
6370 | { | |
988f6b3d | 6371 | return (ada_lookup_struct_elt_type (type, "_tag", refok, 1) != NULL); |
963a6417 | 6372 | } |
96d887e8 | 6373 | |
963a6417 | 6374 | /* True iff TYPE represents the type of X'Tag */ |
96d887e8 | 6375 | |
963a6417 PH |
6376 | int |
6377 | ada_is_tag_type (struct type *type) | |
6378 | { | |
460efde1 JB |
6379 | type = ada_check_typedef (type); |
6380 | ||
78134374 | 6381 | if (type == NULL || type->code () != TYPE_CODE_PTR) |
963a6417 PH |
6382 | return 0; |
6383 | else | |
96d887e8 | 6384 | { |
963a6417 | 6385 | const char *name = ada_type_name (TYPE_TARGET_TYPE (type)); |
5b4ee69b | 6386 | |
963a6417 | 6387 | return (name != NULL |
dda83cd7 | 6388 | && strcmp (name, "ada__tags__dispatch_table") == 0); |
96d887e8 | 6389 | } |
96d887e8 PH |
6390 | } |
6391 | ||
963a6417 | 6392 | /* The type of the tag on VAL. */ |
76a01679 | 6393 | |
de93309a | 6394 | static struct type * |
963a6417 | 6395 | ada_tag_type (struct value *val) |
96d887e8 | 6396 | { |
988f6b3d | 6397 | return ada_lookup_struct_elt_type (value_type (val), "_tag", 1, 0); |
963a6417 | 6398 | } |
96d887e8 | 6399 | |
b50d69b5 JG |
6400 | /* Return 1 if TAG follows the old scheme for Ada tags (used for Ada 95, |
6401 | retired at Ada 05). */ | |
6402 | ||
6403 | static int | |
6404 | is_ada95_tag (struct value *tag) | |
6405 | { | |
6406 | return ada_value_struct_elt (tag, "tsd", 1) != NULL; | |
6407 | } | |
6408 | ||
963a6417 | 6409 | /* The value of the tag on VAL. */ |
96d887e8 | 6410 | |
de93309a | 6411 | static struct value * |
963a6417 PH |
6412 | ada_value_tag (struct value *val) |
6413 | { | |
03ee6b2e | 6414 | return ada_value_struct_elt (val, "_tag", 0); |
96d887e8 PH |
6415 | } |
6416 | ||
963a6417 PH |
6417 | /* The value of the tag on the object of type TYPE whose contents are |
6418 | saved at VALADDR, if it is non-null, or is at memory address | |
0963b4bd | 6419 | ADDRESS. */ |
96d887e8 | 6420 | |
963a6417 | 6421 | static struct value * |
10a2c479 | 6422 | value_tag_from_contents_and_address (struct type *type, |
fc1a4b47 | 6423 | const gdb_byte *valaddr, |
dda83cd7 | 6424 | CORE_ADDR address) |
96d887e8 | 6425 | { |
b5385fc0 | 6426 | int tag_byte_offset; |
963a6417 | 6427 | struct type *tag_type; |
5b4ee69b | 6428 | |
963a6417 | 6429 | if (find_struct_field ("_tag", type, 0, &tag_type, &tag_byte_offset, |
dda83cd7 | 6430 | NULL, NULL, NULL)) |
96d887e8 | 6431 | { |
fc1a4b47 | 6432 | const gdb_byte *valaddr1 = ((valaddr == NULL) |
10a2c479 AC |
6433 | ? NULL |
6434 | : valaddr + tag_byte_offset); | |
963a6417 | 6435 | CORE_ADDR address1 = (address == 0) ? 0 : address + tag_byte_offset; |
96d887e8 | 6436 | |
963a6417 | 6437 | return value_from_contents_and_address (tag_type, valaddr1, address1); |
96d887e8 | 6438 | } |
963a6417 PH |
6439 | return NULL; |
6440 | } | |
96d887e8 | 6441 | |
963a6417 PH |
6442 | static struct type * |
6443 | type_from_tag (struct value *tag) | |
6444 | { | |
f5272a3b | 6445 | gdb::unique_xmalloc_ptr<char> type_name = ada_tag_name (tag); |
5b4ee69b | 6446 | |
963a6417 | 6447 | if (type_name != NULL) |
5c4258f4 | 6448 | return ada_find_any_type (ada_encode (type_name.get ()).c_str ()); |
963a6417 PH |
6449 | return NULL; |
6450 | } | |
96d887e8 | 6451 | |
b50d69b5 JG |
6452 | /* Given a value OBJ of a tagged type, return a value of this |
6453 | type at the base address of the object. The base address, as | |
6454 | defined in Ada.Tags, it is the address of the primary tag of | |
6455 | the object, and therefore where the field values of its full | |
6456 | view can be fetched. */ | |
6457 | ||
6458 | struct value * | |
6459 | ada_tag_value_at_base_address (struct value *obj) | |
6460 | { | |
b50d69b5 JG |
6461 | struct value *val; |
6462 | LONGEST offset_to_top = 0; | |
6463 | struct type *ptr_type, *obj_type; | |
6464 | struct value *tag; | |
6465 | CORE_ADDR base_address; | |
6466 | ||
6467 | obj_type = value_type (obj); | |
6468 | ||
6469 | /* It is the responsability of the caller to deref pointers. */ | |
6470 | ||
78134374 | 6471 | if (obj_type->code () == TYPE_CODE_PTR || obj_type->code () == TYPE_CODE_REF) |
b50d69b5 JG |
6472 | return obj; |
6473 | ||
6474 | tag = ada_value_tag (obj); | |
6475 | if (!tag) | |
6476 | return obj; | |
6477 | ||
6478 | /* Base addresses only appeared with Ada 05 and multiple inheritance. */ | |
6479 | ||
6480 | if (is_ada95_tag (tag)) | |
6481 | return obj; | |
6482 | ||
08f49010 XR |
6483 | ptr_type = language_lookup_primitive_type |
6484 | (language_def (language_ada), target_gdbarch(), "storage_offset"); | |
b50d69b5 JG |
6485 | ptr_type = lookup_pointer_type (ptr_type); |
6486 | val = value_cast (ptr_type, tag); | |
6487 | if (!val) | |
6488 | return obj; | |
6489 | ||
6490 | /* It is perfectly possible that an exception be raised while | |
6491 | trying to determine the base address, just like for the tag; | |
6492 | see ada_tag_name for more details. We do not print the error | |
6493 | message for the same reason. */ | |
6494 | ||
a70b8144 | 6495 | try |
b50d69b5 JG |
6496 | { |
6497 | offset_to_top = value_as_long (value_ind (value_ptradd (val, -2))); | |
6498 | } | |
6499 | ||
230d2906 | 6500 | catch (const gdb_exception_error &e) |
492d29ea PA |
6501 | { |
6502 | return obj; | |
6503 | } | |
b50d69b5 JG |
6504 | |
6505 | /* If offset is null, nothing to do. */ | |
6506 | ||
6507 | if (offset_to_top == 0) | |
6508 | return obj; | |
6509 | ||
6510 | /* -1 is a special case in Ada.Tags; however, what should be done | |
6511 | is not quite clear from the documentation. So do nothing for | |
6512 | now. */ | |
6513 | ||
6514 | if (offset_to_top == -1) | |
6515 | return obj; | |
6516 | ||
08f49010 XR |
6517 | /* OFFSET_TO_TOP used to be a positive value to be subtracted |
6518 | from the base address. This was however incompatible with | |
6519 | C++ dispatch table: C++ uses a *negative* value to *add* | |
6520 | to the base address. Ada's convention has therefore been | |
6521 | changed in GNAT 19.0w 20171023: since then, C++ and Ada | |
6522 | use the same convention. Here, we support both cases by | |
6523 | checking the sign of OFFSET_TO_TOP. */ | |
6524 | ||
6525 | if (offset_to_top > 0) | |
6526 | offset_to_top = -offset_to_top; | |
6527 | ||
6528 | base_address = value_address (obj) + offset_to_top; | |
b50d69b5 JG |
6529 | tag = value_tag_from_contents_and_address (obj_type, NULL, base_address); |
6530 | ||
6531 | /* Make sure that we have a proper tag at the new address. | |
6532 | Otherwise, offset_to_top is bogus (which can happen when | |
6533 | the object is not initialized yet). */ | |
6534 | ||
6535 | if (!tag) | |
6536 | return obj; | |
6537 | ||
6538 | obj_type = type_from_tag (tag); | |
6539 | ||
6540 | if (!obj_type) | |
6541 | return obj; | |
6542 | ||
6543 | return value_from_contents_and_address (obj_type, NULL, base_address); | |
6544 | } | |
6545 | ||
1b611343 JB |
6546 | /* Return the "ada__tags__type_specific_data" type. */ |
6547 | ||
6548 | static struct type * | |
6549 | ada_get_tsd_type (struct inferior *inf) | |
963a6417 | 6550 | { |
1b611343 | 6551 | struct ada_inferior_data *data = get_ada_inferior_data (inf); |
4c4b4cd2 | 6552 | |
1b611343 JB |
6553 | if (data->tsd_type == 0) |
6554 | data->tsd_type = ada_find_any_type ("ada__tags__type_specific_data"); | |
6555 | return data->tsd_type; | |
6556 | } | |
529cad9c | 6557 | |
1b611343 JB |
6558 | /* Return the TSD (type-specific data) associated to the given TAG. |
6559 | TAG is assumed to be the tag of a tagged-type entity. | |
529cad9c | 6560 | |
1b611343 | 6561 | May return NULL if we are unable to get the TSD. */ |
4c4b4cd2 | 6562 | |
1b611343 JB |
6563 | static struct value * |
6564 | ada_get_tsd_from_tag (struct value *tag) | |
4c4b4cd2 | 6565 | { |
4c4b4cd2 | 6566 | struct value *val; |
1b611343 | 6567 | struct type *type; |
5b4ee69b | 6568 | |
1b611343 JB |
6569 | /* First option: The TSD is simply stored as a field of our TAG. |
6570 | Only older versions of GNAT would use this format, but we have | |
6571 | to test it first, because there are no visible markers for | |
6572 | the current approach except the absence of that field. */ | |
529cad9c | 6573 | |
1b611343 JB |
6574 | val = ada_value_struct_elt (tag, "tsd", 1); |
6575 | if (val) | |
6576 | return val; | |
e802dbe0 | 6577 | |
1b611343 JB |
6578 | /* Try the second representation for the dispatch table (in which |
6579 | there is no explicit 'tsd' field in the referent of the tag pointer, | |
6580 | and instead the tsd pointer is stored just before the dispatch | |
6581 | table. */ | |
e802dbe0 | 6582 | |
1b611343 JB |
6583 | type = ada_get_tsd_type (current_inferior()); |
6584 | if (type == NULL) | |
6585 | return NULL; | |
6586 | type = lookup_pointer_type (lookup_pointer_type (type)); | |
6587 | val = value_cast (type, tag); | |
6588 | if (val == NULL) | |
6589 | return NULL; | |
6590 | return value_ind (value_ptradd (val, -1)); | |
e802dbe0 JB |
6591 | } |
6592 | ||
1b611343 JB |
6593 | /* Given the TSD of a tag (type-specific data), return a string |
6594 | containing the name of the associated type. | |
6595 | ||
f5272a3b | 6596 | May return NULL if we are unable to determine the tag name. */ |
1b611343 | 6597 | |
f5272a3b | 6598 | static gdb::unique_xmalloc_ptr<char> |
1b611343 | 6599 | ada_tag_name_from_tsd (struct value *tsd) |
529cad9c | 6600 | { |
529cad9c | 6601 | char *p; |
1b611343 | 6602 | struct value *val; |
529cad9c | 6603 | |
1b611343 | 6604 | val = ada_value_struct_elt (tsd, "expanded_name", 1); |
4c4b4cd2 | 6605 | if (val == NULL) |
1b611343 | 6606 | return NULL; |
66920317 TT |
6607 | gdb::unique_xmalloc_ptr<char> buffer |
6608 | = target_read_string (value_as_address (val), INT_MAX); | |
6609 | if (buffer == nullptr) | |
f5272a3b TT |
6610 | return nullptr; |
6611 | ||
6612 | for (p = buffer.get (); *p != '\0'; ++p) | |
6613 | { | |
6614 | if (isalpha (*p)) | |
6615 | *p = tolower (*p); | |
6616 | } | |
6617 | ||
6618 | return buffer; | |
4c4b4cd2 PH |
6619 | } |
6620 | ||
6621 | /* The type name of the dynamic type denoted by the 'tag value TAG, as | |
1b611343 JB |
6622 | a C string. |
6623 | ||
6624 | Return NULL if the TAG is not an Ada tag, or if we were unable to | |
f5272a3b | 6625 | determine the name of that tag. */ |
4c4b4cd2 | 6626 | |
f5272a3b | 6627 | gdb::unique_xmalloc_ptr<char> |
4c4b4cd2 PH |
6628 | ada_tag_name (struct value *tag) |
6629 | { | |
f5272a3b | 6630 | gdb::unique_xmalloc_ptr<char> name; |
5b4ee69b | 6631 | |
df407dfe | 6632 | if (!ada_is_tag_type (value_type (tag))) |
4c4b4cd2 | 6633 | return NULL; |
1b611343 JB |
6634 | |
6635 | /* It is perfectly possible that an exception be raised while trying | |
6636 | to determine the TAG's name, even under normal circumstances: | |
6637 | The associated variable may be uninitialized or corrupted, for | |
6638 | instance. We do not let any exception propagate past this point. | |
6639 | instead we return NULL. | |
6640 | ||
6641 | We also do not print the error message either (which often is very | |
6642 | low-level (Eg: "Cannot read memory at 0x[...]"), but instead let | |
6643 | the caller print a more meaningful message if necessary. */ | |
a70b8144 | 6644 | try |
1b611343 JB |
6645 | { |
6646 | struct value *tsd = ada_get_tsd_from_tag (tag); | |
6647 | ||
6648 | if (tsd != NULL) | |
6649 | name = ada_tag_name_from_tsd (tsd); | |
6650 | } | |
230d2906 | 6651 | catch (const gdb_exception_error &e) |
492d29ea PA |
6652 | { |
6653 | } | |
1b611343 JB |
6654 | |
6655 | return name; | |
4c4b4cd2 PH |
6656 | } |
6657 | ||
6658 | /* The parent type of TYPE, or NULL if none. */ | |
14f9c5c9 | 6659 | |
d2e4a39e | 6660 | struct type * |
ebf56fd3 | 6661 | ada_parent_type (struct type *type) |
14f9c5c9 AS |
6662 | { |
6663 | int i; | |
6664 | ||
61ee279c | 6665 | type = ada_check_typedef (type); |
14f9c5c9 | 6666 | |
78134374 | 6667 | if (type == NULL || type->code () != TYPE_CODE_STRUCT) |
14f9c5c9 AS |
6668 | return NULL; |
6669 | ||
1f704f76 | 6670 | for (i = 0; i < type->num_fields (); i += 1) |
14f9c5c9 | 6671 | if (ada_is_parent_field (type, i)) |
0c1f74cf | 6672 | { |
dda83cd7 | 6673 | struct type *parent_type = type->field (i).type (); |
0c1f74cf | 6674 | |
dda83cd7 SM |
6675 | /* If the _parent field is a pointer, then dereference it. */ |
6676 | if (parent_type->code () == TYPE_CODE_PTR) | |
6677 | parent_type = TYPE_TARGET_TYPE (parent_type); | |
6678 | /* If there is a parallel XVS type, get the actual base type. */ | |
6679 | parent_type = ada_get_base_type (parent_type); | |
0c1f74cf | 6680 | |
dda83cd7 | 6681 | return ada_check_typedef (parent_type); |
0c1f74cf | 6682 | } |
14f9c5c9 AS |
6683 | |
6684 | return NULL; | |
6685 | } | |
6686 | ||
4c4b4cd2 PH |
6687 | /* True iff field number FIELD_NUM of structure type TYPE contains the |
6688 | parent-type (inherited) fields of a derived type. Assumes TYPE is | |
6689 | a structure type with at least FIELD_NUM+1 fields. */ | |
14f9c5c9 AS |
6690 | |
6691 | int | |
ebf56fd3 | 6692 | ada_is_parent_field (struct type *type, int field_num) |
14f9c5c9 | 6693 | { |
61ee279c | 6694 | const char *name = TYPE_FIELD_NAME (ada_check_typedef (type), field_num); |
5b4ee69b | 6695 | |
4c4b4cd2 | 6696 | return (name != NULL |
dda83cd7 SM |
6697 | && (startswith (name, "PARENT") |
6698 | || startswith (name, "_parent"))); | |
14f9c5c9 AS |
6699 | } |
6700 | ||
4c4b4cd2 | 6701 | /* True iff field number FIELD_NUM of structure type TYPE is a |
14f9c5c9 | 6702 | transparent wrapper field (which should be silently traversed when doing |
4c4b4cd2 | 6703 | field selection and flattened when printing). Assumes TYPE is a |
14f9c5c9 | 6704 | structure type with at least FIELD_NUM+1 fields. Such fields are always |
4c4b4cd2 | 6705 | structures. */ |
14f9c5c9 AS |
6706 | |
6707 | int | |
ebf56fd3 | 6708 | ada_is_wrapper_field (struct type *type, int field_num) |
14f9c5c9 | 6709 | { |
d2e4a39e | 6710 | const char *name = TYPE_FIELD_NAME (type, field_num); |
5b4ee69b | 6711 | |
dddc0e16 JB |
6712 | if (name != NULL && strcmp (name, "RETVAL") == 0) |
6713 | { | |
6714 | /* This happens in functions with "out" or "in out" parameters | |
6715 | which are passed by copy. For such functions, GNAT describes | |
6716 | the function's return type as being a struct where the return | |
6717 | value is in a field called RETVAL, and where the other "out" | |
6718 | or "in out" parameters are fields of that struct. This is not | |
6719 | a wrapper. */ | |
6720 | return 0; | |
6721 | } | |
6722 | ||
d2e4a39e | 6723 | return (name != NULL |
dda83cd7 SM |
6724 | && (startswith (name, "PARENT") |
6725 | || strcmp (name, "REP") == 0 | |
6726 | || startswith (name, "_parent") | |
6727 | || name[0] == 'S' || name[0] == 'R' || name[0] == 'O')); | |
14f9c5c9 AS |
6728 | } |
6729 | ||
4c4b4cd2 PH |
6730 | /* True iff field number FIELD_NUM of structure or union type TYPE |
6731 | is a variant wrapper. Assumes TYPE is a structure type with at least | |
6732 | FIELD_NUM+1 fields. */ | |
14f9c5c9 AS |
6733 | |
6734 | int | |
ebf56fd3 | 6735 | ada_is_variant_part (struct type *type, int field_num) |
14f9c5c9 | 6736 | { |
8ecb59f8 TT |
6737 | /* Only Ada types are eligible. */ |
6738 | if (!ADA_TYPE_P (type)) | |
6739 | return 0; | |
6740 | ||
940da03e | 6741 | struct type *field_type = type->field (field_num).type (); |
5b4ee69b | 6742 | |
78134374 SM |
6743 | return (field_type->code () == TYPE_CODE_UNION |
6744 | || (is_dynamic_field (type, field_num) | |
6745 | && (TYPE_TARGET_TYPE (field_type)->code () | |
c3e5cd34 | 6746 | == TYPE_CODE_UNION))); |
14f9c5c9 AS |
6747 | } |
6748 | ||
6749 | /* Assuming that VAR_TYPE is a variant wrapper (type of the variant part) | |
4c4b4cd2 | 6750 | whose discriminants are contained in the record type OUTER_TYPE, |
7c964f07 UW |
6751 | returns the type of the controlling discriminant for the variant. |
6752 | May return NULL if the type could not be found. */ | |
14f9c5c9 | 6753 | |
d2e4a39e | 6754 | struct type * |
ebf56fd3 | 6755 | ada_variant_discrim_type (struct type *var_type, struct type *outer_type) |
14f9c5c9 | 6756 | { |
a121b7c1 | 6757 | const char *name = ada_variant_discrim_name (var_type); |
5b4ee69b | 6758 | |
988f6b3d | 6759 | return ada_lookup_struct_elt_type (outer_type, name, 1, 1); |
14f9c5c9 AS |
6760 | } |
6761 | ||
4c4b4cd2 | 6762 | /* Assuming that TYPE is the type of a variant wrapper, and FIELD_NUM is a |
14f9c5c9 | 6763 | valid field number within it, returns 1 iff field FIELD_NUM of TYPE |
4c4b4cd2 | 6764 | represents a 'when others' clause; otherwise 0. */ |
14f9c5c9 | 6765 | |
de93309a | 6766 | static int |
ebf56fd3 | 6767 | ada_is_others_clause (struct type *type, int field_num) |
14f9c5c9 | 6768 | { |
d2e4a39e | 6769 | const char *name = TYPE_FIELD_NAME (type, field_num); |
5b4ee69b | 6770 | |
14f9c5c9 AS |
6771 | return (name != NULL && name[0] == 'O'); |
6772 | } | |
6773 | ||
6774 | /* Assuming that TYPE0 is the type of the variant part of a record, | |
4c4b4cd2 PH |
6775 | returns the name of the discriminant controlling the variant. |
6776 | The value is valid until the next call to ada_variant_discrim_name. */ | |
14f9c5c9 | 6777 | |
a121b7c1 | 6778 | const char * |
ebf56fd3 | 6779 | ada_variant_discrim_name (struct type *type0) |
14f9c5c9 | 6780 | { |
d2e4a39e | 6781 | static char *result = NULL; |
14f9c5c9 | 6782 | static size_t result_len = 0; |
d2e4a39e AS |
6783 | struct type *type; |
6784 | const char *name; | |
6785 | const char *discrim_end; | |
6786 | const char *discrim_start; | |
14f9c5c9 | 6787 | |
78134374 | 6788 | if (type0->code () == TYPE_CODE_PTR) |
14f9c5c9 AS |
6789 | type = TYPE_TARGET_TYPE (type0); |
6790 | else | |
6791 | type = type0; | |
6792 | ||
6793 | name = ada_type_name (type); | |
6794 | ||
6795 | if (name == NULL || name[0] == '\000') | |
6796 | return ""; | |
6797 | ||
6798 | for (discrim_end = name + strlen (name) - 6; discrim_end != name; | |
6799 | discrim_end -= 1) | |
6800 | { | |
61012eef | 6801 | if (startswith (discrim_end, "___XVN")) |
dda83cd7 | 6802 | break; |
14f9c5c9 AS |
6803 | } |
6804 | if (discrim_end == name) | |
6805 | return ""; | |
6806 | ||
d2e4a39e | 6807 | for (discrim_start = discrim_end; discrim_start != name + 3; |
14f9c5c9 AS |
6808 | discrim_start -= 1) |
6809 | { | |
d2e4a39e | 6810 | if (discrim_start == name + 1) |
dda83cd7 | 6811 | return ""; |
76a01679 | 6812 | if ((discrim_start > name + 3 |
dda83cd7 SM |
6813 | && startswith (discrim_start - 3, "___")) |
6814 | || discrim_start[-1] == '.') | |
6815 | break; | |
14f9c5c9 AS |
6816 | } |
6817 | ||
6818 | GROW_VECT (result, result_len, discrim_end - discrim_start + 1); | |
6819 | strncpy (result, discrim_start, discrim_end - discrim_start); | |
d2e4a39e | 6820 | result[discrim_end - discrim_start] = '\0'; |
14f9c5c9 AS |
6821 | return result; |
6822 | } | |
6823 | ||
4c4b4cd2 PH |
6824 | /* Scan STR for a subtype-encoded number, beginning at position K. |
6825 | Put the position of the character just past the number scanned in | |
6826 | *NEW_K, if NEW_K!=NULL. Put the scanned number in *R, if R!=NULL. | |
6827 | Return 1 if there was a valid number at the given position, and 0 | |
6828 | otherwise. A "subtype-encoded" number consists of the absolute value | |
6829 | in decimal, followed by the letter 'm' to indicate a negative number. | |
6830 | Assumes 0m does not occur. */ | |
14f9c5c9 AS |
6831 | |
6832 | int | |
d2e4a39e | 6833 | ada_scan_number (const char str[], int k, LONGEST * R, int *new_k) |
14f9c5c9 AS |
6834 | { |
6835 | ULONGEST RU; | |
6836 | ||
d2e4a39e | 6837 | if (!isdigit (str[k])) |
14f9c5c9 AS |
6838 | return 0; |
6839 | ||
4c4b4cd2 | 6840 | /* Do it the hard way so as not to make any assumption about |
14f9c5c9 | 6841 | the relationship of unsigned long (%lu scan format code) and |
4c4b4cd2 | 6842 | LONGEST. */ |
14f9c5c9 AS |
6843 | RU = 0; |
6844 | while (isdigit (str[k])) | |
6845 | { | |
d2e4a39e | 6846 | RU = RU * 10 + (str[k] - '0'); |
14f9c5c9 AS |
6847 | k += 1; |
6848 | } | |
6849 | ||
d2e4a39e | 6850 | if (str[k] == 'm') |
14f9c5c9 AS |
6851 | { |
6852 | if (R != NULL) | |
dda83cd7 | 6853 | *R = (-(LONGEST) (RU - 1)) - 1; |
14f9c5c9 AS |
6854 | k += 1; |
6855 | } | |
6856 | else if (R != NULL) | |
6857 | *R = (LONGEST) RU; | |
6858 | ||
4c4b4cd2 | 6859 | /* NOTE on the above: Technically, C does not say what the results of |
14f9c5c9 AS |
6860 | - (LONGEST) RU or (LONGEST) -RU are for RU == largest positive |
6861 | number representable as a LONGEST (although either would probably work | |
6862 | in most implementations). When RU>0, the locution in the then branch | |
4c4b4cd2 | 6863 | above is always equivalent to the negative of RU. */ |
14f9c5c9 AS |
6864 | |
6865 | if (new_k != NULL) | |
6866 | *new_k = k; | |
6867 | return 1; | |
6868 | } | |
6869 | ||
4c4b4cd2 PH |
6870 | /* Assuming that TYPE is a variant part wrapper type (a VARIANTS field), |
6871 | and FIELD_NUM is a valid field number within it, returns 1 iff VAL is | |
6872 | in the range encoded by field FIELD_NUM of TYPE; otherwise 0. */ | |
14f9c5c9 | 6873 | |
de93309a | 6874 | static int |
ebf56fd3 | 6875 | ada_in_variant (LONGEST val, struct type *type, int field_num) |
14f9c5c9 | 6876 | { |
d2e4a39e | 6877 | const char *name = TYPE_FIELD_NAME (type, field_num); |
14f9c5c9 AS |
6878 | int p; |
6879 | ||
6880 | p = 0; | |
6881 | while (1) | |
6882 | { | |
d2e4a39e | 6883 | switch (name[p]) |
dda83cd7 SM |
6884 | { |
6885 | case '\0': | |
6886 | return 0; | |
6887 | case 'S': | |
6888 | { | |
6889 | LONGEST W; | |
6890 | ||
6891 | if (!ada_scan_number (name, p + 1, &W, &p)) | |
6892 | return 0; | |
6893 | if (val == W) | |
6894 | return 1; | |
6895 | break; | |
6896 | } | |
6897 | case 'R': | |
6898 | { | |
6899 | LONGEST L, U; | |
6900 | ||
6901 | if (!ada_scan_number (name, p + 1, &L, &p) | |
6902 | || name[p] != 'T' || !ada_scan_number (name, p + 1, &U, &p)) | |
6903 | return 0; | |
6904 | if (val >= L && val <= U) | |
6905 | return 1; | |
6906 | break; | |
6907 | } | |
6908 | case 'O': | |
6909 | return 1; | |
6910 | default: | |
6911 | return 0; | |
6912 | } | |
4c4b4cd2 PH |
6913 | } |
6914 | } | |
6915 | ||
0963b4bd | 6916 | /* FIXME: Lots of redundancy below. Try to consolidate. */ |
4c4b4cd2 PH |
6917 | |
6918 | /* Given a value ARG1 (offset by OFFSET bytes) of a struct or union type | |
6919 | ARG_TYPE, extract and return the value of one of its (non-static) | |
6920 | fields. FIELDNO says which field. Differs from value_primitive_field | |
6921 | only in that it can handle packed values of arbitrary type. */ | |
14f9c5c9 | 6922 | |
5eb68a39 | 6923 | struct value * |
d2e4a39e | 6924 | ada_value_primitive_field (struct value *arg1, int offset, int fieldno, |
dda83cd7 | 6925 | struct type *arg_type) |
14f9c5c9 | 6926 | { |
14f9c5c9 AS |
6927 | struct type *type; |
6928 | ||
61ee279c | 6929 | arg_type = ada_check_typedef (arg_type); |
940da03e | 6930 | type = arg_type->field (fieldno).type (); |
14f9c5c9 | 6931 | |
4504bbde TT |
6932 | /* Handle packed fields. It might be that the field is not packed |
6933 | relative to its containing structure, but the structure itself is | |
6934 | packed; in this case we must take the bit-field path. */ | |
6935 | if (TYPE_FIELD_BITSIZE (arg_type, fieldno) != 0 || value_bitpos (arg1) != 0) | |
14f9c5c9 AS |
6936 | { |
6937 | int bit_pos = TYPE_FIELD_BITPOS (arg_type, fieldno); | |
6938 | int bit_size = TYPE_FIELD_BITSIZE (arg_type, fieldno); | |
d2e4a39e | 6939 | |
0fd88904 | 6940 | return ada_value_primitive_packed_val (arg1, value_contents (arg1), |
dda83cd7 SM |
6941 | offset + bit_pos / 8, |
6942 | bit_pos % 8, bit_size, type); | |
14f9c5c9 AS |
6943 | } |
6944 | else | |
6945 | return value_primitive_field (arg1, offset, fieldno, arg_type); | |
6946 | } | |
6947 | ||
52ce6436 PH |
6948 | /* Find field with name NAME in object of type TYPE. If found, |
6949 | set the following for each argument that is non-null: | |
6950 | - *FIELD_TYPE_P to the field's type; | |
6951 | - *BYTE_OFFSET_P to OFFSET + the byte offset of the field within | |
6952 | an object of that type; | |
6953 | - *BIT_OFFSET_P to the bit offset modulo byte size of the field; | |
6954 | - *BIT_SIZE_P to its size in bits if the field is packed, and | |
6955 | 0 otherwise; | |
6956 | If INDEX_P is non-null, increment *INDEX_P by the number of source-visible | |
6957 | fields up to but not including the desired field, or by the total | |
6958 | number of fields if not found. A NULL value of NAME never | |
6959 | matches; the function just counts visible fields in this case. | |
6960 | ||
828d5846 XR |
6961 | Notice that we need to handle when a tagged record hierarchy |
6962 | has some components with the same name, like in this scenario: | |
6963 | ||
6964 | type Top_T is tagged record | |
dda83cd7 SM |
6965 | N : Integer := 1; |
6966 | U : Integer := 974; | |
6967 | A : Integer := 48; | |
828d5846 XR |
6968 | end record; |
6969 | ||
6970 | type Middle_T is new Top.Top_T with record | |
dda83cd7 SM |
6971 | N : Character := 'a'; |
6972 | C : Integer := 3; | |
828d5846 XR |
6973 | end record; |
6974 | ||
6975 | type Bottom_T is new Middle.Middle_T with record | |
dda83cd7 SM |
6976 | N : Float := 4.0; |
6977 | C : Character := '5'; | |
6978 | X : Integer := 6; | |
6979 | A : Character := 'J'; | |
828d5846 XR |
6980 | end record; |
6981 | ||
6982 | Let's say we now have a variable declared and initialized as follow: | |
6983 | ||
6984 | TC : Top_A := new Bottom_T; | |
6985 | ||
6986 | And then we use this variable to call this function | |
6987 | ||
6988 | procedure Assign (Obj: in out Top_T; TV : Integer); | |
6989 | ||
6990 | as follow: | |
6991 | ||
6992 | Assign (Top_T (B), 12); | |
6993 | ||
6994 | Now, we're in the debugger, and we're inside that procedure | |
6995 | then and we want to print the value of obj.c: | |
6996 | ||
6997 | Usually, the tagged record or one of the parent type owns the | |
6998 | component to print and there's no issue but in this particular | |
6999 | case, what does it mean to ask for Obj.C? Since the actual | |
7000 | type for object is type Bottom_T, it could mean two things: type | |
7001 | component C from the Middle_T view, but also component C from | |
7002 | Bottom_T. So in that "undefined" case, when the component is | |
7003 | not found in the non-resolved type (which includes all the | |
7004 | components of the parent type), then resolve it and see if we | |
7005 | get better luck once expanded. | |
7006 | ||
7007 | In the case of homonyms in the derived tagged type, we don't | |
7008 | guaranty anything, and pick the one that's easiest for us | |
7009 | to program. | |
7010 | ||
0963b4bd | 7011 | Returns 1 if found, 0 otherwise. */ |
52ce6436 | 7012 | |
4c4b4cd2 | 7013 | static int |
0d5cff50 | 7014 | find_struct_field (const char *name, struct type *type, int offset, |
dda83cd7 SM |
7015 | struct type **field_type_p, |
7016 | int *byte_offset_p, int *bit_offset_p, int *bit_size_p, | |
52ce6436 | 7017 | int *index_p) |
4c4b4cd2 PH |
7018 | { |
7019 | int i; | |
828d5846 | 7020 | int parent_offset = -1; |
4c4b4cd2 | 7021 | |
61ee279c | 7022 | type = ada_check_typedef (type); |
76a01679 | 7023 | |
52ce6436 PH |
7024 | if (field_type_p != NULL) |
7025 | *field_type_p = NULL; | |
7026 | if (byte_offset_p != NULL) | |
d5d6fca5 | 7027 | *byte_offset_p = 0; |
52ce6436 PH |
7028 | if (bit_offset_p != NULL) |
7029 | *bit_offset_p = 0; | |
7030 | if (bit_size_p != NULL) | |
7031 | *bit_size_p = 0; | |
7032 | ||
1f704f76 | 7033 | for (i = 0; i < type->num_fields (); i += 1) |
4c4b4cd2 PH |
7034 | { |
7035 | int bit_pos = TYPE_FIELD_BITPOS (type, i); | |
7036 | int fld_offset = offset + bit_pos / 8; | |
0d5cff50 | 7037 | const char *t_field_name = TYPE_FIELD_NAME (type, i); |
76a01679 | 7038 | |
4c4b4cd2 | 7039 | if (t_field_name == NULL) |
dda83cd7 | 7040 | continue; |
4c4b4cd2 | 7041 | |
828d5846 | 7042 | else if (ada_is_parent_field (type, i)) |
dda83cd7 | 7043 | { |
828d5846 XR |
7044 | /* This is a field pointing us to the parent type of a tagged |
7045 | type. As hinted in this function's documentation, we give | |
7046 | preference to fields in the current record first, so what | |
7047 | we do here is just record the index of this field before | |
7048 | we skip it. If it turns out we couldn't find our field | |
7049 | in the current record, then we'll get back to it and search | |
7050 | inside it whether the field might exist in the parent. */ | |
7051 | ||
dda83cd7 SM |
7052 | parent_offset = i; |
7053 | continue; | |
7054 | } | |
828d5846 | 7055 | |
52ce6436 | 7056 | else if (name != NULL && field_name_match (t_field_name, name)) |
dda83cd7 SM |
7057 | { |
7058 | int bit_size = TYPE_FIELD_BITSIZE (type, i); | |
5b4ee69b | 7059 | |
52ce6436 | 7060 | if (field_type_p != NULL) |
940da03e | 7061 | *field_type_p = type->field (i).type (); |
52ce6436 PH |
7062 | if (byte_offset_p != NULL) |
7063 | *byte_offset_p = fld_offset; | |
7064 | if (bit_offset_p != NULL) | |
7065 | *bit_offset_p = bit_pos % 8; | |
7066 | if (bit_size_p != NULL) | |
7067 | *bit_size_p = bit_size; | |
dda83cd7 SM |
7068 | return 1; |
7069 | } | |
4c4b4cd2 | 7070 | else if (ada_is_wrapper_field (type, i)) |
dda83cd7 | 7071 | { |
940da03e | 7072 | if (find_struct_field (name, type->field (i).type (), fld_offset, |
52ce6436 PH |
7073 | field_type_p, byte_offset_p, bit_offset_p, |
7074 | bit_size_p, index_p)) | |
dda83cd7 SM |
7075 | return 1; |
7076 | } | |
4c4b4cd2 | 7077 | else if (ada_is_variant_part (type, i)) |
dda83cd7 | 7078 | { |
52ce6436 PH |
7079 | /* PNH: Wait. Do we ever execute this section, or is ARG always of |
7080 | fixed type?? */ | |
dda83cd7 SM |
7081 | int j; |
7082 | struct type *field_type | |
940da03e | 7083 | = ada_check_typedef (type->field (i).type ()); |
4c4b4cd2 | 7084 | |
dda83cd7 SM |
7085 | for (j = 0; j < field_type->num_fields (); j += 1) |
7086 | { | |
7087 | if (find_struct_field (name, field_type->field (j).type (), | |
7088 | fld_offset | |
7089 | + TYPE_FIELD_BITPOS (field_type, j) / 8, | |
7090 | field_type_p, byte_offset_p, | |
7091 | bit_offset_p, bit_size_p, index_p)) | |
7092 | return 1; | |
7093 | } | |
7094 | } | |
52ce6436 PH |
7095 | else if (index_p != NULL) |
7096 | *index_p += 1; | |
4c4b4cd2 | 7097 | } |
828d5846 XR |
7098 | |
7099 | /* Field not found so far. If this is a tagged type which | |
7100 | has a parent, try finding that field in the parent now. */ | |
7101 | ||
7102 | if (parent_offset != -1) | |
7103 | { | |
7104 | int bit_pos = TYPE_FIELD_BITPOS (type, parent_offset); | |
7105 | int fld_offset = offset + bit_pos / 8; | |
7106 | ||
940da03e | 7107 | if (find_struct_field (name, type->field (parent_offset).type (), |
dda83cd7 SM |
7108 | fld_offset, field_type_p, byte_offset_p, |
7109 | bit_offset_p, bit_size_p, index_p)) | |
7110 | return 1; | |
828d5846 XR |
7111 | } |
7112 | ||
4c4b4cd2 PH |
7113 | return 0; |
7114 | } | |
7115 | ||
0963b4bd | 7116 | /* Number of user-visible fields in record type TYPE. */ |
4c4b4cd2 | 7117 | |
52ce6436 PH |
7118 | static int |
7119 | num_visible_fields (struct type *type) | |
7120 | { | |
7121 | int n; | |
5b4ee69b | 7122 | |
52ce6436 PH |
7123 | n = 0; |
7124 | find_struct_field (NULL, type, 0, NULL, NULL, NULL, NULL, &n); | |
7125 | return n; | |
7126 | } | |
14f9c5c9 | 7127 | |
4c4b4cd2 | 7128 | /* Look for a field NAME in ARG. Adjust the address of ARG by OFFSET bytes, |
14f9c5c9 AS |
7129 | and search in it assuming it has (class) type TYPE. |
7130 | If found, return value, else return NULL. | |
7131 | ||
828d5846 XR |
7132 | Searches recursively through wrapper fields (e.g., '_parent'). |
7133 | ||
7134 | In the case of homonyms in the tagged types, please refer to the | |
7135 | long explanation in find_struct_field's function documentation. */ | |
14f9c5c9 | 7136 | |
4c4b4cd2 | 7137 | static struct value * |
108d56a4 | 7138 | ada_search_struct_field (const char *name, struct value *arg, int offset, |
dda83cd7 | 7139 | struct type *type) |
14f9c5c9 AS |
7140 | { |
7141 | int i; | |
828d5846 | 7142 | int parent_offset = -1; |
14f9c5c9 | 7143 | |
5b4ee69b | 7144 | type = ada_check_typedef (type); |
1f704f76 | 7145 | for (i = 0; i < type->num_fields (); i += 1) |
14f9c5c9 | 7146 | { |
0d5cff50 | 7147 | const char *t_field_name = TYPE_FIELD_NAME (type, i); |
14f9c5c9 AS |
7148 | |
7149 | if (t_field_name == NULL) | |
dda83cd7 | 7150 | continue; |
14f9c5c9 | 7151 | |
828d5846 | 7152 | else if (ada_is_parent_field (type, i)) |
dda83cd7 | 7153 | { |
828d5846 XR |
7154 | /* This is a field pointing us to the parent type of a tagged |
7155 | type. As hinted in this function's documentation, we give | |
7156 | preference to fields in the current record first, so what | |
7157 | we do here is just record the index of this field before | |
7158 | we skip it. If it turns out we couldn't find our field | |
7159 | in the current record, then we'll get back to it and search | |
7160 | inside it whether the field might exist in the parent. */ | |
7161 | ||
dda83cd7 SM |
7162 | parent_offset = i; |
7163 | continue; | |
7164 | } | |
828d5846 | 7165 | |
14f9c5c9 | 7166 | else if (field_name_match (t_field_name, name)) |
dda83cd7 | 7167 | return ada_value_primitive_field (arg, offset, i, type); |
14f9c5c9 AS |
7168 | |
7169 | else if (ada_is_wrapper_field (type, i)) | |
dda83cd7 SM |
7170 | { |
7171 | struct value *v = /* Do not let indent join lines here. */ | |
7172 | ada_search_struct_field (name, arg, | |
7173 | offset + TYPE_FIELD_BITPOS (type, i) / 8, | |
7174 | type->field (i).type ()); | |
5b4ee69b | 7175 | |
dda83cd7 SM |
7176 | if (v != NULL) |
7177 | return v; | |
7178 | } | |
14f9c5c9 AS |
7179 | |
7180 | else if (ada_is_variant_part (type, i)) | |
dda83cd7 | 7181 | { |
0963b4bd | 7182 | /* PNH: Do we ever get here? See find_struct_field. */ |
dda83cd7 SM |
7183 | int j; |
7184 | struct type *field_type = ada_check_typedef (type->field (i).type ()); | |
7185 | int var_offset = offset + TYPE_FIELD_BITPOS (type, i) / 8; | |
4c4b4cd2 | 7186 | |
dda83cd7 SM |
7187 | for (j = 0; j < field_type->num_fields (); j += 1) |
7188 | { | |
7189 | struct value *v = ada_search_struct_field /* Force line | |
0963b4bd | 7190 | break. */ |
dda83cd7 SM |
7191 | (name, arg, |
7192 | var_offset + TYPE_FIELD_BITPOS (field_type, j) / 8, | |
7193 | field_type->field (j).type ()); | |
5b4ee69b | 7194 | |
dda83cd7 SM |
7195 | if (v != NULL) |
7196 | return v; | |
7197 | } | |
7198 | } | |
14f9c5c9 | 7199 | } |
828d5846 XR |
7200 | |
7201 | /* Field not found so far. If this is a tagged type which | |
7202 | has a parent, try finding that field in the parent now. */ | |
7203 | ||
7204 | if (parent_offset != -1) | |
7205 | { | |
7206 | struct value *v = ada_search_struct_field ( | |
7207 | name, arg, offset + TYPE_FIELD_BITPOS (type, parent_offset) / 8, | |
940da03e | 7208 | type->field (parent_offset).type ()); |
828d5846 XR |
7209 | |
7210 | if (v != NULL) | |
dda83cd7 | 7211 | return v; |
828d5846 XR |
7212 | } |
7213 | ||
14f9c5c9 AS |
7214 | return NULL; |
7215 | } | |
d2e4a39e | 7216 | |
52ce6436 PH |
7217 | static struct value *ada_index_struct_field_1 (int *, struct value *, |
7218 | int, struct type *); | |
7219 | ||
7220 | ||
7221 | /* Return field #INDEX in ARG, where the index is that returned by | |
7222 | * find_struct_field through its INDEX_P argument. Adjust the address | |
7223 | * of ARG by OFFSET bytes, and search in it assuming it has (class) type TYPE. | |
0963b4bd | 7224 | * If found, return value, else return NULL. */ |
52ce6436 PH |
7225 | |
7226 | static struct value * | |
7227 | ada_index_struct_field (int index, struct value *arg, int offset, | |
7228 | struct type *type) | |
7229 | { | |
7230 | return ada_index_struct_field_1 (&index, arg, offset, type); | |
7231 | } | |
7232 | ||
7233 | ||
7234 | /* Auxiliary function for ada_index_struct_field. Like | |
7235 | * ada_index_struct_field, but takes index from *INDEX_P and modifies | |
0963b4bd | 7236 | * *INDEX_P. */ |
52ce6436 PH |
7237 | |
7238 | static struct value * | |
7239 | ada_index_struct_field_1 (int *index_p, struct value *arg, int offset, | |
7240 | struct type *type) | |
7241 | { | |
7242 | int i; | |
7243 | type = ada_check_typedef (type); | |
7244 | ||
1f704f76 | 7245 | for (i = 0; i < type->num_fields (); i += 1) |
52ce6436 PH |
7246 | { |
7247 | if (TYPE_FIELD_NAME (type, i) == NULL) | |
dda83cd7 | 7248 | continue; |
52ce6436 | 7249 | else if (ada_is_wrapper_field (type, i)) |
dda83cd7 SM |
7250 | { |
7251 | struct value *v = /* Do not let indent join lines here. */ | |
7252 | ada_index_struct_field_1 (index_p, arg, | |
52ce6436 | 7253 | offset + TYPE_FIELD_BITPOS (type, i) / 8, |
940da03e | 7254 | type->field (i).type ()); |
5b4ee69b | 7255 | |
dda83cd7 SM |
7256 | if (v != NULL) |
7257 | return v; | |
7258 | } | |
52ce6436 PH |
7259 | |
7260 | else if (ada_is_variant_part (type, i)) | |
dda83cd7 | 7261 | { |
52ce6436 | 7262 | /* PNH: Do we ever get here? See ada_search_struct_field, |
0963b4bd | 7263 | find_struct_field. */ |
52ce6436 | 7264 | error (_("Cannot assign this kind of variant record")); |
dda83cd7 | 7265 | } |
52ce6436 | 7266 | else if (*index_p == 0) |
dda83cd7 | 7267 | return ada_value_primitive_field (arg, offset, i, type); |
52ce6436 PH |
7268 | else |
7269 | *index_p -= 1; | |
7270 | } | |
7271 | return NULL; | |
7272 | } | |
7273 | ||
3b4de39c | 7274 | /* Return a string representation of type TYPE. */ |
99bbb428 | 7275 | |
3b4de39c | 7276 | static std::string |
99bbb428 PA |
7277 | type_as_string (struct type *type) |
7278 | { | |
d7e74731 | 7279 | string_file tmp_stream; |
99bbb428 | 7280 | |
d7e74731 | 7281 | type_print (type, "", &tmp_stream, -1); |
99bbb428 | 7282 | |
d7e74731 | 7283 | return std::move (tmp_stream.string ()); |
99bbb428 PA |
7284 | } |
7285 | ||
14f9c5c9 | 7286 | /* Given a type TYPE, look up the type of the component of type named NAME. |
4c4b4cd2 PH |
7287 | If DISPP is non-null, add its byte displacement from the beginning of a |
7288 | structure (pointed to by a value) of type TYPE to *DISPP (does not | |
14f9c5c9 AS |
7289 | work for packed fields). |
7290 | ||
7291 | Matches any field whose name has NAME as a prefix, possibly | |
4c4b4cd2 | 7292 | followed by "___". |
14f9c5c9 | 7293 | |
0963b4bd | 7294 | TYPE can be either a struct or union. If REFOK, TYPE may also |
4c4b4cd2 PH |
7295 | be a (pointer or reference)+ to a struct or union, and the |
7296 | ultimate target type will be searched. | |
14f9c5c9 AS |
7297 | |
7298 | Looks recursively into variant clauses and parent types. | |
7299 | ||
828d5846 XR |
7300 | In the case of homonyms in the tagged types, please refer to the |
7301 | long explanation in find_struct_field's function documentation. | |
7302 | ||
4c4b4cd2 PH |
7303 | If NOERR is nonzero, return NULL if NAME is not suitably defined or |
7304 | TYPE is not a type of the right kind. */ | |
14f9c5c9 | 7305 | |
4c4b4cd2 | 7306 | static struct type * |
a121b7c1 | 7307 | ada_lookup_struct_elt_type (struct type *type, const char *name, int refok, |
dda83cd7 | 7308 | int noerr) |
14f9c5c9 AS |
7309 | { |
7310 | int i; | |
828d5846 | 7311 | int parent_offset = -1; |
14f9c5c9 AS |
7312 | |
7313 | if (name == NULL) | |
7314 | goto BadName; | |
7315 | ||
76a01679 | 7316 | if (refok && type != NULL) |
4c4b4cd2 PH |
7317 | while (1) |
7318 | { | |
dda83cd7 SM |
7319 | type = ada_check_typedef (type); |
7320 | if (type->code () != TYPE_CODE_PTR && type->code () != TYPE_CODE_REF) | |
7321 | break; | |
7322 | type = TYPE_TARGET_TYPE (type); | |
4c4b4cd2 | 7323 | } |
14f9c5c9 | 7324 | |
76a01679 | 7325 | if (type == NULL |
78134374 SM |
7326 | || (type->code () != TYPE_CODE_STRUCT |
7327 | && type->code () != TYPE_CODE_UNION)) | |
14f9c5c9 | 7328 | { |
4c4b4cd2 | 7329 | if (noerr) |
dda83cd7 | 7330 | return NULL; |
99bbb428 | 7331 | |
3b4de39c PA |
7332 | error (_("Type %s is not a structure or union type"), |
7333 | type != NULL ? type_as_string (type).c_str () : _("(null)")); | |
14f9c5c9 AS |
7334 | } |
7335 | ||
7336 | type = to_static_fixed_type (type); | |
7337 | ||
1f704f76 | 7338 | for (i = 0; i < type->num_fields (); i += 1) |
14f9c5c9 | 7339 | { |
0d5cff50 | 7340 | const char *t_field_name = TYPE_FIELD_NAME (type, i); |
14f9c5c9 | 7341 | struct type *t; |
d2e4a39e | 7342 | |
14f9c5c9 | 7343 | if (t_field_name == NULL) |
dda83cd7 | 7344 | continue; |
14f9c5c9 | 7345 | |
828d5846 | 7346 | else if (ada_is_parent_field (type, i)) |
dda83cd7 | 7347 | { |
828d5846 XR |
7348 | /* This is a field pointing us to the parent type of a tagged |
7349 | type. As hinted in this function's documentation, we give | |
7350 | preference to fields in the current record first, so what | |
7351 | we do here is just record the index of this field before | |
7352 | we skip it. If it turns out we couldn't find our field | |
7353 | in the current record, then we'll get back to it and search | |
7354 | inside it whether the field might exist in the parent. */ | |
7355 | ||
dda83cd7 SM |
7356 | parent_offset = i; |
7357 | continue; | |
7358 | } | |
828d5846 | 7359 | |
14f9c5c9 | 7360 | else if (field_name_match (t_field_name, name)) |
940da03e | 7361 | return type->field (i).type (); |
14f9c5c9 AS |
7362 | |
7363 | else if (ada_is_wrapper_field (type, i)) | |
dda83cd7 SM |
7364 | { |
7365 | t = ada_lookup_struct_elt_type (type->field (i).type (), name, | |
7366 | 0, 1); | |
7367 | if (t != NULL) | |
988f6b3d | 7368 | return t; |
dda83cd7 | 7369 | } |
14f9c5c9 AS |
7370 | |
7371 | else if (ada_is_variant_part (type, i)) | |
dda83cd7 SM |
7372 | { |
7373 | int j; | |
7374 | struct type *field_type = ada_check_typedef (type->field (i).type ()); | |
4c4b4cd2 | 7375 | |
dda83cd7 SM |
7376 | for (j = field_type->num_fields () - 1; j >= 0; j -= 1) |
7377 | { | |
b1f33ddd | 7378 | /* FIXME pnh 2008/01/26: We check for a field that is |
dda83cd7 | 7379 | NOT wrapped in a struct, since the compiler sometimes |
b1f33ddd | 7380 | generates these for unchecked variant types. Revisit |
dda83cd7 | 7381 | if the compiler changes this practice. */ |
0d5cff50 | 7382 | const char *v_field_name = TYPE_FIELD_NAME (field_type, j); |
988f6b3d | 7383 | |
b1f33ddd JB |
7384 | if (v_field_name != NULL |
7385 | && field_name_match (v_field_name, name)) | |
940da03e | 7386 | t = field_type->field (j).type (); |
b1f33ddd | 7387 | else |
940da03e | 7388 | t = ada_lookup_struct_elt_type (field_type->field (j).type (), |
988f6b3d | 7389 | name, 0, 1); |
b1f33ddd | 7390 | |
dda83cd7 | 7391 | if (t != NULL) |
988f6b3d | 7392 | return t; |
dda83cd7 SM |
7393 | } |
7394 | } | |
14f9c5c9 AS |
7395 | |
7396 | } | |
7397 | ||
828d5846 XR |
7398 | /* Field not found so far. If this is a tagged type which |
7399 | has a parent, try finding that field in the parent now. */ | |
7400 | ||
7401 | if (parent_offset != -1) | |
7402 | { | |
dda83cd7 | 7403 | struct type *t; |
828d5846 | 7404 | |
dda83cd7 SM |
7405 | t = ada_lookup_struct_elt_type (type->field (parent_offset).type (), |
7406 | name, 0, 1); | |
7407 | if (t != NULL) | |
828d5846 XR |
7408 | return t; |
7409 | } | |
7410 | ||
14f9c5c9 | 7411 | BadName: |
d2e4a39e | 7412 | if (!noerr) |
14f9c5c9 | 7413 | { |
2b2798cc | 7414 | const char *name_str = name != NULL ? name : _("<null>"); |
99bbb428 PA |
7415 | |
7416 | error (_("Type %s has no component named %s"), | |
3b4de39c | 7417 | type_as_string (type).c_str (), name_str); |
14f9c5c9 AS |
7418 | } |
7419 | ||
7420 | return NULL; | |
7421 | } | |
7422 | ||
b1f33ddd JB |
7423 | /* Assuming that VAR_TYPE is the type of a variant part of a record (a union), |
7424 | within a value of type OUTER_TYPE, return true iff VAR_TYPE | |
7425 | represents an unchecked union (that is, the variant part of a | |
0963b4bd | 7426 | record that is named in an Unchecked_Union pragma). */ |
b1f33ddd JB |
7427 | |
7428 | static int | |
7429 | is_unchecked_variant (struct type *var_type, struct type *outer_type) | |
7430 | { | |
a121b7c1 | 7431 | const char *discrim_name = ada_variant_discrim_name (var_type); |
5b4ee69b | 7432 | |
988f6b3d | 7433 | return (ada_lookup_struct_elt_type (outer_type, discrim_name, 0, 1) == NULL); |
b1f33ddd JB |
7434 | } |
7435 | ||
7436 | ||
14f9c5c9 | 7437 | /* Assuming that VAR_TYPE is the type of a variant part of a record (a union), |
d8af9068 | 7438 | within OUTER, determine which variant clause (field number in VAR_TYPE, |
4c4b4cd2 | 7439 | numbering from 0) is applicable. Returns -1 if none are. */ |
14f9c5c9 | 7440 | |
d2e4a39e | 7441 | int |
d8af9068 | 7442 | ada_which_variant_applies (struct type *var_type, struct value *outer) |
14f9c5c9 AS |
7443 | { |
7444 | int others_clause; | |
7445 | int i; | |
a121b7c1 | 7446 | const char *discrim_name = ada_variant_discrim_name (var_type); |
0c281816 | 7447 | struct value *discrim; |
14f9c5c9 AS |
7448 | LONGEST discrim_val; |
7449 | ||
012370f6 TT |
7450 | /* Using plain value_from_contents_and_address here causes problems |
7451 | because we will end up trying to resolve a type that is currently | |
7452 | being constructed. */ | |
0c281816 JB |
7453 | discrim = ada_value_struct_elt (outer, discrim_name, 1); |
7454 | if (discrim == NULL) | |
14f9c5c9 | 7455 | return -1; |
0c281816 | 7456 | discrim_val = value_as_long (discrim); |
14f9c5c9 AS |
7457 | |
7458 | others_clause = -1; | |
1f704f76 | 7459 | for (i = 0; i < var_type->num_fields (); i += 1) |
14f9c5c9 AS |
7460 | { |
7461 | if (ada_is_others_clause (var_type, i)) | |
dda83cd7 | 7462 | others_clause = i; |
14f9c5c9 | 7463 | else if (ada_in_variant (discrim_val, var_type, i)) |
dda83cd7 | 7464 | return i; |
14f9c5c9 AS |
7465 | } |
7466 | ||
7467 | return others_clause; | |
7468 | } | |
d2e4a39e | 7469 | \f |
14f9c5c9 AS |
7470 | |
7471 | ||
dda83cd7 | 7472 | /* Dynamic-Sized Records */ |
14f9c5c9 AS |
7473 | |
7474 | /* Strategy: The type ostensibly attached to a value with dynamic size | |
7475 | (i.e., a size that is not statically recorded in the debugging | |
7476 | data) does not accurately reflect the size or layout of the value. | |
7477 | Our strategy is to convert these values to values with accurate, | |
4c4b4cd2 | 7478 | conventional types that are constructed on the fly. */ |
14f9c5c9 AS |
7479 | |
7480 | /* There is a subtle and tricky problem here. In general, we cannot | |
7481 | determine the size of dynamic records without its data. However, | |
7482 | the 'struct value' data structure, which GDB uses to represent | |
7483 | quantities in the inferior process (the target), requires the size | |
7484 | of the type at the time of its allocation in order to reserve space | |
7485 | for GDB's internal copy of the data. That's why the | |
7486 | 'to_fixed_xxx_type' routines take (target) addresses as parameters, | |
4c4b4cd2 | 7487 | rather than struct value*s. |
14f9c5c9 AS |
7488 | |
7489 | However, GDB's internal history variables ($1, $2, etc.) are | |
7490 | struct value*s containing internal copies of the data that are not, in | |
7491 | general, the same as the data at their corresponding addresses in | |
7492 | the target. Fortunately, the types we give to these values are all | |
7493 | conventional, fixed-size types (as per the strategy described | |
7494 | above), so that we don't usually have to perform the | |
7495 | 'to_fixed_xxx_type' conversions to look at their values. | |
7496 | Unfortunately, there is one exception: if one of the internal | |
7497 | history variables is an array whose elements are unconstrained | |
7498 | records, then we will need to create distinct fixed types for each | |
7499 | element selected. */ | |
7500 | ||
7501 | /* The upshot of all of this is that many routines take a (type, host | |
7502 | address, target address) triple as arguments to represent a value. | |
7503 | The host address, if non-null, is supposed to contain an internal | |
7504 | copy of the relevant data; otherwise, the program is to consult the | |
4c4b4cd2 | 7505 | target at the target address. */ |
14f9c5c9 AS |
7506 | |
7507 | /* Assuming that VAL0 represents a pointer value, the result of | |
7508 | dereferencing it. Differs from value_ind in its treatment of | |
4c4b4cd2 | 7509 | dynamic-sized types. */ |
14f9c5c9 | 7510 | |
d2e4a39e AS |
7511 | struct value * |
7512 | ada_value_ind (struct value *val0) | |
14f9c5c9 | 7513 | { |
c48db5ca | 7514 | struct value *val = value_ind (val0); |
5b4ee69b | 7515 | |
b50d69b5 JG |
7516 | if (ada_is_tagged_type (value_type (val), 0)) |
7517 | val = ada_tag_value_at_base_address (val); | |
7518 | ||
4c4b4cd2 | 7519 | return ada_to_fixed_value (val); |
14f9c5c9 AS |
7520 | } |
7521 | ||
7522 | /* The value resulting from dereferencing any "reference to" | |
4c4b4cd2 PH |
7523 | qualifiers on VAL0. */ |
7524 | ||
d2e4a39e AS |
7525 | static struct value * |
7526 | ada_coerce_ref (struct value *val0) | |
7527 | { | |
78134374 | 7528 | if (value_type (val0)->code () == TYPE_CODE_REF) |
d2e4a39e AS |
7529 | { |
7530 | struct value *val = val0; | |
5b4ee69b | 7531 | |
994b9211 | 7532 | val = coerce_ref (val); |
b50d69b5 JG |
7533 | |
7534 | if (ada_is_tagged_type (value_type (val), 0)) | |
7535 | val = ada_tag_value_at_base_address (val); | |
7536 | ||
4c4b4cd2 | 7537 | return ada_to_fixed_value (val); |
d2e4a39e AS |
7538 | } |
7539 | else | |
14f9c5c9 AS |
7540 | return val0; |
7541 | } | |
7542 | ||
4c4b4cd2 | 7543 | /* Return the bit alignment required for field #F of template type TYPE. */ |
14f9c5c9 AS |
7544 | |
7545 | static unsigned int | |
ebf56fd3 | 7546 | field_alignment (struct type *type, int f) |
14f9c5c9 | 7547 | { |
d2e4a39e | 7548 | const char *name = TYPE_FIELD_NAME (type, f); |
64a1bf19 | 7549 | int len; |
14f9c5c9 AS |
7550 | int align_offset; |
7551 | ||
64a1bf19 JB |
7552 | /* The field name should never be null, unless the debugging information |
7553 | is somehow malformed. In this case, we assume the field does not | |
7554 | require any alignment. */ | |
7555 | if (name == NULL) | |
7556 | return 1; | |
7557 | ||
7558 | len = strlen (name); | |
7559 | ||
4c4b4cd2 PH |
7560 | if (!isdigit (name[len - 1])) |
7561 | return 1; | |
14f9c5c9 | 7562 | |
d2e4a39e | 7563 | if (isdigit (name[len - 2])) |
14f9c5c9 AS |
7564 | align_offset = len - 2; |
7565 | else | |
7566 | align_offset = len - 1; | |
7567 | ||
61012eef | 7568 | if (align_offset < 7 || !startswith (name + align_offset - 6, "___XV")) |
14f9c5c9 AS |
7569 | return TARGET_CHAR_BIT; |
7570 | ||
4c4b4cd2 PH |
7571 | return atoi (name + align_offset) * TARGET_CHAR_BIT; |
7572 | } | |
7573 | ||
852dff6c | 7574 | /* Find a typedef or tag symbol named NAME. Ignores ambiguity. */ |
4c4b4cd2 | 7575 | |
852dff6c JB |
7576 | static struct symbol * |
7577 | ada_find_any_type_symbol (const char *name) | |
4c4b4cd2 PH |
7578 | { |
7579 | struct symbol *sym; | |
7580 | ||
7581 | sym = standard_lookup (name, get_selected_block (NULL), VAR_DOMAIN); | |
4186eb54 | 7582 | if (sym != NULL && SYMBOL_CLASS (sym) == LOC_TYPEDEF) |
4c4b4cd2 PH |
7583 | return sym; |
7584 | ||
4186eb54 KS |
7585 | sym = standard_lookup (name, NULL, STRUCT_DOMAIN); |
7586 | return sym; | |
14f9c5c9 AS |
7587 | } |
7588 | ||
dddfab26 UW |
7589 | /* Find a type named NAME. Ignores ambiguity. This routine will look |
7590 | solely for types defined by debug info, it will not search the GDB | |
7591 | primitive types. */ | |
4c4b4cd2 | 7592 | |
852dff6c | 7593 | static struct type * |
ebf56fd3 | 7594 | ada_find_any_type (const char *name) |
14f9c5c9 | 7595 | { |
852dff6c | 7596 | struct symbol *sym = ada_find_any_type_symbol (name); |
14f9c5c9 | 7597 | |
14f9c5c9 | 7598 | if (sym != NULL) |
dddfab26 | 7599 | return SYMBOL_TYPE (sym); |
14f9c5c9 | 7600 | |
dddfab26 | 7601 | return NULL; |
14f9c5c9 AS |
7602 | } |
7603 | ||
739593e0 JB |
7604 | /* Given NAME_SYM and an associated BLOCK, find a "renaming" symbol |
7605 | associated with NAME_SYM's name. NAME_SYM may itself be a renaming | |
7606 | symbol, in which case it is returned. Otherwise, this looks for | |
7607 | symbols whose name is that of NAME_SYM suffixed with "___XR". | |
7608 | Return symbol if found, and NULL otherwise. */ | |
4c4b4cd2 | 7609 | |
c0e70c62 TT |
7610 | static bool |
7611 | ada_is_renaming_symbol (struct symbol *name_sym) | |
aeb5907d | 7612 | { |
987012b8 | 7613 | const char *name = name_sym->linkage_name (); |
c0e70c62 | 7614 | return strstr (name, "___XR") != NULL; |
4c4b4cd2 PH |
7615 | } |
7616 | ||
14f9c5c9 | 7617 | /* Because of GNAT encoding conventions, several GDB symbols may match a |
4c4b4cd2 | 7618 | given type name. If the type denoted by TYPE0 is to be preferred to |
14f9c5c9 | 7619 | that of TYPE1 for purposes of type printing, return non-zero; |
4c4b4cd2 PH |
7620 | otherwise return 0. */ |
7621 | ||
14f9c5c9 | 7622 | int |
d2e4a39e | 7623 | ada_prefer_type (struct type *type0, struct type *type1) |
14f9c5c9 AS |
7624 | { |
7625 | if (type1 == NULL) | |
7626 | return 1; | |
7627 | else if (type0 == NULL) | |
7628 | return 0; | |
78134374 | 7629 | else if (type1->code () == TYPE_CODE_VOID) |
14f9c5c9 | 7630 | return 1; |
78134374 | 7631 | else if (type0->code () == TYPE_CODE_VOID) |
14f9c5c9 | 7632 | return 0; |
7d93a1e0 | 7633 | else if (type1->name () == NULL && type0->name () != NULL) |
4c4b4cd2 | 7634 | return 1; |
ad82864c | 7635 | else if (ada_is_constrained_packed_array_type (type0)) |
14f9c5c9 | 7636 | return 1; |
4c4b4cd2 | 7637 | else if (ada_is_array_descriptor_type (type0) |
dda83cd7 | 7638 | && !ada_is_array_descriptor_type (type1)) |
14f9c5c9 | 7639 | return 1; |
aeb5907d JB |
7640 | else |
7641 | { | |
7d93a1e0 SM |
7642 | const char *type0_name = type0->name (); |
7643 | const char *type1_name = type1->name (); | |
aeb5907d JB |
7644 | |
7645 | if (type0_name != NULL && strstr (type0_name, "___XR") != NULL | |
7646 | && (type1_name == NULL || strstr (type1_name, "___XR") == NULL)) | |
7647 | return 1; | |
7648 | } | |
14f9c5c9 AS |
7649 | return 0; |
7650 | } | |
7651 | ||
e86ca25f TT |
7652 | /* The name of TYPE, which is its TYPE_NAME. Null if TYPE is |
7653 | null. */ | |
4c4b4cd2 | 7654 | |
0d5cff50 | 7655 | const char * |
d2e4a39e | 7656 | ada_type_name (struct type *type) |
14f9c5c9 | 7657 | { |
d2e4a39e | 7658 | if (type == NULL) |
14f9c5c9 | 7659 | return NULL; |
7d93a1e0 | 7660 | return type->name (); |
14f9c5c9 AS |
7661 | } |
7662 | ||
b4ba55a1 JB |
7663 | /* Search the list of "descriptive" types associated to TYPE for a type |
7664 | whose name is NAME. */ | |
7665 | ||
7666 | static struct type * | |
7667 | find_parallel_type_by_descriptive_type (struct type *type, const char *name) | |
7668 | { | |
931e5bc3 | 7669 | struct type *result, *tmp; |
b4ba55a1 | 7670 | |
c6044dd1 JB |
7671 | if (ada_ignore_descriptive_types_p) |
7672 | return NULL; | |
7673 | ||
b4ba55a1 JB |
7674 | /* If there no descriptive-type info, then there is no parallel type |
7675 | to be found. */ | |
7676 | if (!HAVE_GNAT_AUX_INFO (type)) | |
7677 | return NULL; | |
7678 | ||
7679 | result = TYPE_DESCRIPTIVE_TYPE (type); | |
7680 | while (result != NULL) | |
7681 | { | |
0d5cff50 | 7682 | const char *result_name = ada_type_name (result); |
b4ba55a1 JB |
7683 | |
7684 | if (result_name == NULL) | |
dda83cd7 SM |
7685 | { |
7686 | warning (_("unexpected null name on descriptive type")); | |
7687 | return NULL; | |
7688 | } | |
b4ba55a1 JB |
7689 | |
7690 | /* If the names match, stop. */ | |
7691 | if (strcmp (result_name, name) == 0) | |
7692 | break; | |
7693 | ||
7694 | /* Otherwise, look at the next item on the list, if any. */ | |
7695 | if (HAVE_GNAT_AUX_INFO (result)) | |
931e5bc3 JG |
7696 | tmp = TYPE_DESCRIPTIVE_TYPE (result); |
7697 | else | |
7698 | tmp = NULL; | |
7699 | ||
7700 | /* If not found either, try after having resolved the typedef. */ | |
7701 | if (tmp != NULL) | |
7702 | result = tmp; | |
b4ba55a1 | 7703 | else |
931e5bc3 | 7704 | { |
f168693b | 7705 | result = check_typedef (result); |
931e5bc3 JG |
7706 | if (HAVE_GNAT_AUX_INFO (result)) |
7707 | result = TYPE_DESCRIPTIVE_TYPE (result); | |
7708 | else | |
7709 | result = NULL; | |
7710 | } | |
b4ba55a1 JB |
7711 | } |
7712 | ||
7713 | /* If we didn't find a match, see whether this is a packed array. With | |
7714 | older compilers, the descriptive type information is either absent or | |
7715 | irrelevant when it comes to packed arrays so the above lookup fails. | |
7716 | Fall back to using a parallel lookup by name in this case. */ | |
12ab9e09 | 7717 | if (result == NULL && ada_is_constrained_packed_array_type (type)) |
b4ba55a1 JB |
7718 | return ada_find_any_type (name); |
7719 | ||
7720 | return result; | |
7721 | } | |
7722 | ||
7723 | /* Find a parallel type to TYPE with the specified NAME, using the | |
7724 | descriptive type taken from the debugging information, if available, | |
7725 | and otherwise using the (slower) name-based method. */ | |
7726 | ||
7727 | static struct type * | |
7728 | ada_find_parallel_type_with_name (struct type *type, const char *name) | |
7729 | { | |
7730 | struct type *result = NULL; | |
7731 | ||
7732 | if (HAVE_GNAT_AUX_INFO (type)) | |
7733 | result = find_parallel_type_by_descriptive_type (type, name); | |
7734 | else | |
7735 | result = ada_find_any_type (name); | |
7736 | ||
7737 | return result; | |
7738 | } | |
7739 | ||
7740 | /* Same as above, but specify the name of the parallel type by appending | |
4c4b4cd2 | 7741 | SUFFIX to the name of TYPE. */ |
14f9c5c9 | 7742 | |
d2e4a39e | 7743 | struct type * |
ebf56fd3 | 7744 | ada_find_parallel_type (struct type *type, const char *suffix) |
14f9c5c9 | 7745 | { |
0d5cff50 | 7746 | char *name; |
fe978cb0 | 7747 | const char *type_name = ada_type_name (type); |
14f9c5c9 | 7748 | int len; |
d2e4a39e | 7749 | |
fe978cb0 | 7750 | if (type_name == NULL) |
14f9c5c9 AS |
7751 | return NULL; |
7752 | ||
fe978cb0 | 7753 | len = strlen (type_name); |
14f9c5c9 | 7754 | |
b4ba55a1 | 7755 | name = (char *) alloca (len + strlen (suffix) + 1); |
14f9c5c9 | 7756 | |
fe978cb0 | 7757 | strcpy (name, type_name); |
14f9c5c9 AS |
7758 | strcpy (name + len, suffix); |
7759 | ||
b4ba55a1 | 7760 | return ada_find_parallel_type_with_name (type, name); |
14f9c5c9 AS |
7761 | } |
7762 | ||
14f9c5c9 | 7763 | /* If TYPE is a variable-size record type, return the corresponding template |
4c4b4cd2 | 7764 | type describing its fields. Otherwise, return NULL. */ |
14f9c5c9 | 7765 | |
d2e4a39e AS |
7766 | static struct type * |
7767 | dynamic_template_type (struct type *type) | |
14f9c5c9 | 7768 | { |
61ee279c | 7769 | type = ada_check_typedef (type); |
14f9c5c9 | 7770 | |
78134374 | 7771 | if (type == NULL || type->code () != TYPE_CODE_STRUCT |
d2e4a39e | 7772 | || ada_type_name (type) == NULL) |
14f9c5c9 | 7773 | return NULL; |
d2e4a39e | 7774 | else |
14f9c5c9 AS |
7775 | { |
7776 | int len = strlen (ada_type_name (type)); | |
5b4ee69b | 7777 | |
4c4b4cd2 | 7778 | if (len > 6 && strcmp (ada_type_name (type) + len - 6, "___XVE") == 0) |
dda83cd7 | 7779 | return type; |
14f9c5c9 | 7780 | else |
dda83cd7 | 7781 | return ada_find_parallel_type (type, "___XVE"); |
14f9c5c9 AS |
7782 | } |
7783 | } | |
7784 | ||
7785 | /* Assuming that TEMPL_TYPE is a union or struct type, returns | |
4c4b4cd2 | 7786 | non-zero iff field FIELD_NUM of TEMPL_TYPE has dynamic size. */ |
14f9c5c9 | 7787 | |
d2e4a39e AS |
7788 | static int |
7789 | is_dynamic_field (struct type *templ_type, int field_num) | |
14f9c5c9 AS |
7790 | { |
7791 | const char *name = TYPE_FIELD_NAME (templ_type, field_num); | |
5b4ee69b | 7792 | |
d2e4a39e | 7793 | return name != NULL |
940da03e | 7794 | && templ_type->field (field_num).type ()->code () == TYPE_CODE_PTR |
14f9c5c9 AS |
7795 | && strstr (name, "___XVL") != NULL; |
7796 | } | |
7797 | ||
4c4b4cd2 PH |
7798 | /* The index of the variant field of TYPE, or -1 if TYPE does not |
7799 | represent a variant record type. */ | |
14f9c5c9 | 7800 | |
d2e4a39e | 7801 | static int |
4c4b4cd2 | 7802 | variant_field_index (struct type *type) |
14f9c5c9 AS |
7803 | { |
7804 | int f; | |
7805 | ||
78134374 | 7806 | if (type == NULL || type->code () != TYPE_CODE_STRUCT) |
4c4b4cd2 PH |
7807 | return -1; |
7808 | ||
1f704f76 | 7809 | for (f = 0; f < type->num_fields (); f += 1) |
4c4b4cd2 PH |
7810 | { |
7811 | if (ada_is_variant_part (type, f)) | |
dda83cd7 | 7812 | return f; |
4c4b4cd2 PH |
7813 | } |
7814 | return -1; | |
14f9c5c9 AS |
7815 | } |
7816 | ||
4c4b4cd2 PH |
7817 | /* A record type with no fields. */ |
7818 | ||
d2e4a39e | 7819 | static struct type * |
fe978cb0 | 7820 | empty_record (struct type *templ) |
14f9c5c9 | 7821 | { |
fe978cb0 | 7822 | struct type *type = alloc_type_copy (templ); |
5b4ee69b | 7823 | |
67607e24 | 7824 | type->set_code (TYPE_CODE_STRUCT); |
8ecb59f8 | 7825 | INIT_NONE_SPECIFIC (type); |
d0e39ea2 | 7826 | type->set_name ("<empty>"); |
14f9c5c9 AS |
7827 | TYPE_LENGTH (type) = 0; |
7828 | return type; | |
7829 | } | |
7830 | ||
7831 | /* An ordinary record type (with fixed-length fields) that describes | |
4c4b4cd2 PH |
7832 | the value of type TYPE at VALADDR or ADDRESS (see comments at |
7833 | the beginning of this section) VAL according to GNAT conventions. | |
7834 | DVAL0 should describe the (portion of a) record that contains any | |
df407dfe | 7835 | necessary discriminants. It should be NULL if value_type (VAL) is |
14f9c5c9 AS |
7836 | an outer-level type (i.e., as opposed to a branch of a variant.) A |
7837 | variant field (unless unchecked) is replaced by a particular branch | |
4c4b4cd2 | 7838 | of the variant. |
14f9c5c9 | 7839 | |
4c4b4cd2 PH |
7840 | If not KEEP_DYNAMIC_FIELDS, then all fields whose position or |
7841 | length are not statically known are discarded. As a consequence, | |
7842 | VALADDR, ADDRESS and DVAL0 are ignored. | |
7843 | ||
7844 | NOTE: Limitations: For now, we assume that dynamic fields and | |
7845 | variants occupy whole numbers of bytes. However, they need not be | |
7846 | byte-aligned. */ | |
7847 | ||
7848 | struct type * | |
10a2c479 | 7849 | ada_template_to_fixed_record_type_1 (struct type *type, |
fc1a4b47 | 7850 | const gdb_byte *valaddr, |
dda83cd7 SM |
7851 | CORE_ADDR address, struct value *dval0, |
7852 | int keep_dynamic_fields) | |
14f9c5c9 | 7853 | { |
d2e4a39e AS |
7854 | struct value *mark = value_mark (); |
7855 | struct value *dval; | |
7856 | struct type *rtype; | |
14f9c5c9 | 7857 | int nfields, bit_len; |
4c4b4cd2 | 7858 | int variant_field; |
14f9c5c9 | 7859 | long off; |
d94e4f4f | 7860 | int fld_bit_len; |
14f9c5c9 AS |
7861 | int f; |
7862 | ||
4c4b4cd2 PH |
7863 | /* Compute the number of fields in this record type that are going |
7864 | to be processed: unless keep_dynamic_fields, this includes only | |
7865 | fields whose position and length are static will be processed. */ | |
7866 | if (keep_dynamic_fields) | |
1f704f76 | 7867 | nfields = type->num_fields (); |
4c4b4cd2 PH |
7868 | else |
7869 | { | |
7870 | nfields = 0; | |
1f704f76 | 7871 | while (nfields < type->num_fields () |
dda83cd7 SM |
7872 | && !ada_is_variant_part (type, nfields) |
7873 | && !is_dynamic_field (type, nfields)) | |
7874 | nfields++; | |
4c4b4cd2 PH |
7875 | } |
7876 | ||
e9bb382b | 7877 | rtype = alloc_type_copy (type); |
67607e24 | 7878 | rtype->set_code (TYPE_CODE_STRUCT); |
8ecb59f8 | 7879 | INIT_NONE_SPECIFIC (rtype); |
5e33d5f4 | 7880 | rtype->set_num_fields (nfields); |
3cabb6b0 SM |
7881 | rtype->set_fields |
7882 | ((struct field *) TYPE_ZALLOC (rtype, nfields * sizeof (struct field))); | |
d0e39ea2 | 7883 | rtype->set_name (ada_type_name (type)); |
9cdd0d12 | 7884 | rtype->set_is_fixed_instance (true); |
14f9c5c9 | 7885 | |
d2e4a39e AS |
7886 | off = 0; |
7887 | bit_len = 0; | |
4c4b4cd2 PH |
7888 | variant_field = -1; |
7889 | ||
14f9c5c9 AS |
7890 | for (f = 0; f < nfields; f += 1) |
7891 | { | |
a89febbd | 7892 | off = align_up (off, field_alignment (type, f)) |
6c038f32 | 7893 | + TYPE_FIELD_BITPOS (type, f); |
ceacbf6e | 7894 | SET_FIELD_BITPOS (rtype->field (f), off); |
d2e4a39e | 7895 | TYPE_FIELD_BITSIZE (rtype, f) = 0; |
14f9c5c9 | 7896 | |
d2e4a39e | 7897 | if (ada_is_variant_part (type, f)) |
dda83cd7 SM |
7898 | { |
7899 | variant_field = f; | |
7900 | fld_bit_len = 0; | |
7901 | } | |
14f9c5c9 | 7902 | else if (is_dynamic_field (type, f)) |
dda83cd7 | 7903 | { |
284614f0 JB |
7904 | const gdb_byte *field_valaddr = valaddr; |
7905 | CORE_ADDR field_address = address; | |
7906 | struct type *field_type = | |
940da03e | 7907 | TYPE_TARGET_TYPE (type->field (f).type ()); |
284614f0 | 7908 | |
dda83cd7 | 7909 | if (dval0 == NULL) |
b5304971 JG |
7910 | { |
7911 | /* rtype's length is computed based on the run-time | |
7912 | value of discriminants. If the discriminants are not | |
7913 | initialized, the type size may be completely bogus and | |
0963b4bd | 7914 | GDB may fail to allocate a value for it. So check the |
b5304971 | 7915 | size first before creating the value. */ |
c1b5a1a6 | 7916 | ada_ensure_varsize_limit (rtype); |
012370f6 TT |
7917 | /* Using plain value_from_contents_and_address here |
7918 | causes problems because we will end up trying to | |
7919 | resolve a type that is currently being | |
7920 | constructed. */ | |
7921 | dval = value_from_contents_and_address_unresolved (rtype, | |
7922 | valaddr, | |
7923 | address); | |
9f1f738a | 7924 | rtype = value_type (dval); |
b5304971 | 7925 | } |
dda83cd7 SM |
7926 | else |
7927 | dval = dval0; | |
4c4b4cd2 | 7928 | |
284614f0 JB |
7929 | /* If the type referenced by this field is an aligner type, we need |
7930 | to unwrap that aligner type, because its size might not be set. | |
7931 | Keeping the aligner type would cause us to compute the wrong | |
7932 | size for this field, impacting the offset of the all the fields | |
7933 | that follow this one. */ | |
7934 | if (ada_is_aligner_type (field_type)) | |
7935 | { | |
7936 | long field_offset = TYPE_FIELD_BITPOS (field_type, f); | |
7937 | ||
7938 | field_valaddr = cond_offset_host (field_valaddr, field_offset); | |
7939 | field_address = cond_offset_target (field_address, field_offset); | |
7940 | field_type = ada_aligned_type (field_type); | |
7941 | } | |
7942 | ||
7943 | field_valaddr = cond_offset_host (field_valaddr, | |
7944 | off / TARGET_CHAR_BIT); | |
7945 | field_address = cond_offset_target (field_address, | |
7946 | off / TARGET_CHAR_BIT); | |
7947 | ||
7948 | /* Get the fixed type of the field. Note that, in this case, | |
7949 | we do not want to get the real type out of the tag: if | |
7950 | the current field is the parent part of a tagged record, | |
7951 | we will get the tag of the object. Clearly wrong: the real | |
7952 | type of the parent is not the real type of the child. We | |
7953 | would end up in an infinite loop. */ | |
7954 | field_type = ada_get_base_type (field_type); | |
7955 | field_type = ada_to_fixed_type (field_type, field_valaddr, | |
7956 | field_address, dval, 0); | |
27f2a97b JB |
7957 | /* If the field size is already larger than the maximum |
7958 | object size, then the record itself will necessarily | |
7959 | be larger than the maximum object size. We need to make | |
7960 | this check now, because the size might be so ridiculously | |
7961 | large (due to an uninitialized variable in the inferior) | |
7962 | that it would cause an overflow when adding it to the | |
7963 | record size. */ | |
c1b5a1a6 | 7964 | ada_ensure_varsize_limit (field_type); |
284614f0 | 7965 | |
5d14b6e5 | 7966 | rtype->field (f).set_type (field_type); |
dda83cd7 | 7967 | TYPE_FIELD_NAME (rtype, f) = TYPE_FIELD_NAME (type, f); |
27f2a97b JB |
7968 | /* The multiplication can potentially overflow. But because |
7969 | the field length has been size-checked just above, and | |
7970 | assuming that the maximum size is a reasonable value, | |
7971 | an overflow should not happen in practice. So rather than | |
7972 | adding overflow recovery code to this already complex code, | |
7973 | we just assume that it's not going to happen. */ | |
dda83cd7 SM |
7974 | fld_bit_len = |
7975 | TYPE_LENGTH (rtype->field (f).type ()) * TARGET_CHAR_BIT; | |
7976 | } | |
14f9c5c9 | 7977 | else |
dda83cd7 | 7978 | { |
5ded5331 JB |
7979 | /* Note: If this field's type is a typedef, it is important |
7980 | to preserve the typedef layer. | |
7981 | ||
7982 | Otherwise, we might be transforming a typedef to a fat | |
7983 | pointer (encoding a pointer to an unconstrained array), | |
7984 | into a basic fat pointer (encoding an unconstrained | |
7985 | array). As both types are implemented using the same | |
7986 | structure, the typedef is the only clue which allows us | |
7987 | to distinguish between the two options. Stripping it | |
7988 | would prevent us from printing this field appropriately. */ | |
dda83cd7 SM |
7989 | rtype->field (f).set_type (type->field (f).type ()); |
7990 | TYPE_FIELD_NAME (rtype, f) = TYPE_FIELD_NAME (type, f); | |
7991 | if (TYPE_FIELD_BITSIZE (type, f) > 0) | |
7992 | fld_bit_len = | |
7993 | TYPE_FIELD_BITSIZE (rtype, f) = TYPE_FIELD_BITSIZE (type, f); | |
7994 | else | |
5ded5331 | 7995 | { |
940da03e | 7996 | struct type *field_type = type->field (f).type (); |
5ded5331 JB |
7997 | |
7998 | /* We need to be careful of typedefs when computing | |
7999 | the length of our field. If this is a typedef, | |
8000 | get the length of the target type, not the length | |
8001 | of the typedef. */ | |
78134374 | 8002 | if (field_type->code () == TYPE_CODE_TYPEDEF) |
5ded5331 JB |
8003 | field_type = ada_typedef_target_type (field_type); |
8004 | ||
dda83cd7 SM |
8005 | fld_bit_len = |
8006 | TYPE_LENGTH (ada_check_typedef (field_type)) * TARGET_CHAR_BIT; | |
5ded5331 | 8007 | } |
dda83cd7 | 8008 | } |
14f9c5c9 | 8009 | if (off + fld_bit_len > bit_len) |
dda83cd7 | 8010 | bit_len = off + fld_bit_len; |
d94e4f4f | 8011 | off += fld_bit_len; |
4c4b4cd2 | 8012 | TYPE_LENGTH (rtype) = |
dda83cd7 | 8013 | align_up (bit_len, TARGET_CHAR_BIT) / TARGET_CHAR_BIT; |
14f9c5c9 | 8014 | } |
4c4b4cd2 PH |
8015 | |
8016 | /* We handle the variant part, if any, at the end because of certain | |
b1f33ddd | 8017 | odd cases in which it is re-ordered so as NOT to be the last field of |
4c4b4cd2 PH |
8018 | the record. This can happen in the presence of representation |
8019 | clauses. */ | |
8020 | if (variant_field >= 0) | |
8021 | { | |
8022 | struct type *branch_type; | |
8023 | ||
8024 | off = TYPE_FIELD_BITPOS (rtype, variant_field); | |
8025 | ||
8026 | if (dval0 == NULL) | |
9f1f738a | 8027 | { |
012370f6 TT |
8028 | /* Using plain value_from_contents_and_address here causes |
8029 | problems because we will end up trying to resolve a type | |
8030 | that is currently being constructed. */ | |
8031 | dval = value_from_contents_and_address_unresolved (rtype, valaddr, | |
8032 | address); | |
9f1f738a SA |
8033 | rtype = value_type (dval); |
8034 | } | |
4c4b4cd2 | 8035 | else |
dda83cd7 | 8036 | dval = dval0; |
4c4b4cd2 PH |
8037 | |
8038 | branch_type = | |
dda83cd7 SM |
8039 | to_fixed_variant_branch_type |
8040 | (type->field (variant_field).type (), | |
8041 | cond_offset_host (valaddr, off / TARGET_CHAR_BIT), | |
8042 | cond_offset_target (address, off / TARGET_CHAR_BIT), dval); | |
4c4b4cd2 | 8043 | if (branch_type == NULL) |
dda83cd7 SM |
8044 | { |
8045 | for (f = variant_field + 1; f < rtype->num_fields (); f += 1) | |
8046 | rtype->field (f - 1) = rtype->field (f); | |
5e33d5f4 | 8047 | rtype->set_num_fields (rtype->num_fields () - 1); |
dda83cd7 | 8048 | } |
4c4b4cd2 | 8049 | else |
dda83cd7 SM |
8050 | { |
8051 | rtype->field (variant_field).set_type (branch_type); | |
8052 | TYPE_FIELD_NAME (rtype, variant_field) = "S"; | |
8053 | fld_bit_len = | |
8054 | TYPE_LENGTH (rtype->field (variant_field).type ()) * | |
8055 | TARGET_CHAR_BIT; | |
8056 | if (off + fld_bit_len > bit_len) | |
8057 | bit_len = off + fld_bit_len; | |
8058 | TYPE_LENGTH (rtype) = | |
8059 | align_up (bit_len, TARGET_CHAR_BIT) / TARGET_CHAR_BIT; | |
8060 | } | |
4c4b4cd2 PH |
8061 | } |
8062 | ||
714e53ab PH |
8063 | /* According to exp_dbug.ads, the size of TYPE for variable-size records |
8064 | should contain the alignment of that record, which should be a strictly | |
8065 | positive value. If null or negative, then something is wrong, most | |
8066 | probably in the debug info. In that case, we don't round up the size | |
0963b4bd | 8067 | of the resulting type. If this record is not part of another structure, |
714e53ab PH |
8068 | the current RTYPE length might be good enough for our purposes. */ |
8069 | if (TYPE_LENGTH (type) <= 0) | |
8070 | { | |
7d93a1e0 | 8071 | if (rtype->name ()) |
cc1defb1 | 8072 | warning (_("Invalid type size for `%s' detected: %s."), |
7d93a1e0 | 8073 | rtype->name (), pulongest (TYPE_LENGTH (type))); |
323e0a4a | 8074 | else |
cc1defb1 KS |
8075 | warning (_("Invalid type size for <unnamed> detected: %s."), |
8076 | pulongest (TYPE_LENGTH (type))); | |
714e53ab PH |
8077 | } |
8078 | else | |
8079 | { | |
a89febbd TT |
8080 | TYPE_LENGTH (rtype) = align_up (TYPE_LENGTH (rtype), |
8081 | TYPE_LENGTH (type)); | |
714e53ab | 8082 | } |
14f9c5c9 AS |
8083 | |
8084 | value_free_to_mark (mark); | |
d2e4a39e | 8085 | if (TYPE_LENGTH (rtype) > varsize_limit) |
323e0a4a | 8086 | error (_("record type with dynamic size is larger than varsize-limit")); |
14f9c5c9 AS |
8087 | return rtype; |
8088 | } | |
8089 | ||
4c4b4cd2 PH |
8090 | /* As for ada_template_to_fixed_record_type_1 with KEEP_DYNAMIC_FIELDS |
8091 | of 1. */ | |
14f9c5c9 | 8092 | |
d2e4a39e | 8093 | static struct type * |
fc1a4b47 | 8094 | template_to_fixed_record_type (struct type *type, const gdb_byte *valaddr, |
dda83cd7 | 8095 | CORE_ADDR address, struct value *dval0) |
4c4b4cd2 PH |
8096 | { |
8097 | return ada_template_to_fixed_record_type_1 (type, valaddr, | |
dda83cd7 | 8098 | address, dval0, 1); |
4c4b4cd2 PH |
8099 | } |
8100 | ||
8101 | /* An ordinary record type in which ___XVL-convention fields and | |
8102 | ___XVU- and ___XVN-convention field types in TYPE0 are replaced with | |
8103 | static approximations, containing all possible fields. Uses | |
8104 | no runtime values. Useless for use in values, but that's OK, | |
8105 | since the results are used only for type determinations. Works on both | |
8106 | structs and unions. Representation note: to save space, we memorize | |
8107 | the result of this function in the TYPE_TARGET_TYPE of the | |
8108 | template type. */ | |
8109 | ||
8110 | static struct type * | |
8111 | template_to_static_fixed_type (struct type *type0) | |
14f9c5c9 AS |
8112 | { |
8113 | struct type *type; | |
8114 | int nfields; | |
8115 | int f; | |
8116 | ||
9e195661 | 8117 | /* No need no do anything if the input type is already fixed. */ |
22c4c60c | 8118 | if (type0->is_fixed_instance ()) |
9e195661 PMR |
8119 | return type0; |
8120 | ||
8121 | /* Likewise if we already have computed the static approximation. */ | |
4c4b4cd2 PH |
8122 | if (TYPE_TARGET_TYPE (type0) != NULL) |
8123 | return TYPE_TARGET_TYPE (type0); | |
8124 | ||
9e195661 | 8125 | /* Don't clone TYPE0 until we are sure we are going to need a copy. */ |
4c4b4cd2 | 8126 | type = type0; |
1f704f76 | 8127 | nfields = type0->num_fields (); |
9e195661 PMR |
8128 | |
8129 | /* Whether or not we cloned TYPE0, cache the result so that we don't do | |
8130 | recompute all over next time. */ | |
8131 | TYPE_TARGET_TYPE (type0) = type; | |
14f9c5c9 AS |
8132 | |
8133 | for (f = 0; f < nfields; f += 1) | |
8134 | { | |
940da03e | 8135 | struct type *field_type = type0->field (f).type (); |
4c4b4cd2 | 8136 | struct type *new_type; |
14f9c5c9 | 8137 | |
4c4b4cd2 | 8138 | if (is_dynamic_field (type0, f)) |
460efde1 JB |
8139 | { |
8140 | field_type = ada_check_typedef (field_type); | |
dda83cd7 | 8141 | new_type = to_static_fixed_type (TYPE_TARGET_TYPE (field_type)); |
460efde1 | 8142 | } |
14f9c5c9 | 8143 | else |
dda83cd7 | 8144 | new_type = static_unwrap_type (field_type); |
9e195661 PMR |
8145 | |
8146 | if (new_type != field_type) | |
8147 | { | |
8148 | /* Clone TYPE0 only the first time we get a new field type. */ | |
8149 | if (type == type0) | |
8150 | { | |
8151 | TYPE_TARGET_TYPE (type0) = type = alloc_type_copy (type0); | |
78134374 | 8152 | type->set_code (type0->code ()); |
8ecb59f8 | 8153 | INIT_NONE_SPECIFIC (type); |
5e33d5f4 | 8154 | type->set_num_fields (nfields); |
3cabb6b0 SM |
8155 | |
8156 | field *fields = | |
8157 | ((struct field *) | |
8158 | TYPE_ALLOC (type, nfields * sizeof (struct field))); | |
80fc5e77 | 8159 | memcpy (fields, type0->fields (), |
9e195661 | 8160 | sizeof (struct field) * nfields); |
3cabb6b0 SM |
8161 | type->set_fields (fields); |
8162 | ||
d0e39ea2 | 8163 | type->set_name (ada_type_name (type0)); |
9cdd0d12 | 8164 | type->set_is_fixed_instance (true); |
9e195661 PMR |
8165 | TYPE_LENGTH (type) = 0; |
8166 | } | |
5d14b6e5 | 8167 | type->field (f).set_type (new_type); |
9e195661 PMR |
8168 | TYPE_FIELD_NAME (type, f) = TYPE_FIELD_NAME (type0, f); |
8169 | } | |
14f9c5c9 | 8170 | } |
9e195661 | 8171 | |
14f9c5c9 AS |
8172 | return type; |
8173 | } | |
8174 | ||
4c4b4cd2 | 8175 | /* Given an object of type TYPE whose contents are at VALADDR and |
5823c3ef JB |
8176 | whose address in memory is ADDRESS, returns a revision of TYPE, |
8177 | which should be a non-dynamic-sized record, in which the variant | |
8178 | part, if any, is replaced with the appropriate branch. Looks | |
4c4b4cd2 PH |
8179 | for discriminant values in DVAL0, which can be NULL if the record |
8180 | contains the necessary discriminant values. */ | |
8181 | ||
d2e4a39e | 8182 | static struct type * |
fc1a4b47 | 8183 | to_record_with_fixed_variant_part (struct type *type, const gdb_byte *valaddr, |
dda83cd7 | 8184 | CORE_ADDR address, struct value *dval0) |
14f9c5c9 | 8185 | { |
d2e4a39e | 8186 | struct value *mark = value_mark (); |
4c4b4cd2 | 8187 | struct value *dval; |
d2e4a39e | 8188 | struct type *rtype; |
14f9c5c9 | 8189 | struct type *branch_type; |
1f704f76 | 8190 | int nfields = type->num_fields (); |
4c4b4cd2 | 8191 | int variant_field = variant_field_index (type); |
14f9c5c9 | 8192 | |
4c4b4cd2 | 8193 | if (variant_field == -1) |
14f9c5c9 AS |
8194 | return type; |
8195 | ||
4c4b4cd2 | 8196 | if (dval0 == NULL) |
9f1f738a SA |
8197 | { |
8198 | dval = value_from_contents_and_address (type, valaddr, address); | |
8199 | type = value_type (dval); | |
8200 | } | |
4c4b4cd2 PH |
8201 | else |
8202 | dval = dval0; | |
8203 | ||
e9bb382b | 8204 | rtype = alloc_type_copy (type); |
67607e24 | 8205 | rtype->set_code (TYPE_CODE_STRUCT); |
8ecb59f8 | 8206 | INIT_NONE_SPECIFIC (rtype); |
5e33d5f4 | 8207 | rtype->set_num_fields (nfields); |
3cabb6b0 SM |
8208 | |
8209 | field *fields = | |
d2e4a39e | 8210 | (struct field *) TYPE_ALLOC (rtype, nfields * sizeof (struct field)); |
80fc5e77 | 8211 | memcpy (fields, type->fields (), sizeof (struct field) * nfields); |
3cabb6b0 SM |
8212 | rtype->set_fields (fields); |
8213 | ||
d0e39ea2 | 8214 | rtype->set_name (ada_type_name (type)); |
9cdd0d12 | 8215 | rtype->set_is_fixed_instance (true); |
14f9c5c9 AS |
8216 | TYPE_LENGTH (rtype) = TYPE_LENGTH (type); |
8217 | ||
4c4b4cd2 | 8218 | branch_type = to_fixed_variant_branch_type |
940da03e | 8219 | (type->field (variant_field).type (), |
d2e4a39e | 8220 | cond_offset_host (valaddr, |
dda83cd7 SM |
8221 | TYPE_FIELD_BITPOS (type, variant_field) |
8222 | / TARGET_CHAR_BIT), | |
d2e4a39e | 8223 | cond_offset_target (address, |
dda83cd7 SM |
8224 | TYPE_FIELD_BITPOS (type, variant_field) |
8225 | / TARGET_CHAR_BIT), dval); | |
d2e4a39e | 8226 | if (branch_type == NULL) |
14f9c5c9 | 8227 | { |
4c4b4cd2 | 8228 | int f; |
5b4ee69b | 8229 | |
4c4b4cd2 | 8230 | for (f = variant_field + 1; f < nfields; f += 1) |
dda83cd7 | 8231 | rtype->field (f - 1) = rtype->field (f); |
5e33d5f4 | 8232 | rtype->set_num_fields (rtype->num_fields () - 1); |
14f9c5c9 AS |
8233 | } |
8234 | else | |
8235 | { | |
5d14b6e5 | 8236 | rtype->field (variant_field).set_type (branch_type); |
4c4b4cd2 PH |
8237 | TYPE_FIELD_NAME (rtype, variant_field) = "S"; |
8238 | TYPE_FIELD_BITSIZE (rtype, variant_field) = 0; | |
14f9c5c9 | 8239 | TYPE_LENGTH (rtype) += TYPE_LENGTH (branch_type); |
14f9c5c9 | 8240 | } |
940da03e | 8241 | TYPE_LENGTH (rtype) -= TYPE_LENGTH (type->field (variant_field).type ()); |
d2e4a39e | 8242 | |
4c4b4cd2 | 8243 | value_free_to_mark (mark); |
14f9c5c9 AS |
8244 | return rtype; |
8245 | } | |
8246 | ||
8247 | /* An ordinary record type (with fixed-length fields) that describes | |
8248 | the value at (TYPE0, VALADDR, ADDRESS) [see explanation at | |
8249 | beginning of this section]. Any necessary discriminants' values | |
4c4b4cd2 PH |
8250 | should be in DVAL, a record value; it may be NULL if the object |
8251 | at ADDR itself contains any necessary discriminant values. | |
8252 | Additionally, VALADDR and ADDRESS may also be NULL if no discriminant | |
8253 | values from the record are needed. Except in the case that DVAL, | |
8254 | VALADDR, and ADDRESS are all 0 or NULL, a variant field (unless | |
8255 | unchecked) is replaced by a particular branch of the variant. | |
8256 | ||
8257 | NOTE: the case in which DVAL and VALADDR are NULL and ADDRESS is 0 | |
8258 | is questionable and may be removed. It can arise during the | |
8259 | processing of an unconstrained-array-of-record type where all the | |
8260 | variant branches have exactly the same size. This is because in | |
8261 | such cases, the compiler does not bother to use the XVS convention | |
8262 | when encoding the record. I am currently dubious of this | |
8263 | shortcut and suspect the compiler should be altered. FIXME. */ | |
14f9c5c9 | 8264 | |
d2e4a39e | 8265 | static struct type * |
fc1a4b47 | 8266 | to_fixed_record_type (struct type *type0, const gdb_byte *valaddr, |
dda83cd7 | 8267 | CORE_ADDR address, struct value *dval) |
14f9c5c9 | 8268 | { |
d2e4a39e | 8269 | struct type *templ_type; |
14f9c5c9 | 8270 | |
22c4c60c | 8271 | if (type0->is_fixed_instance ()) |
4c4b4cd2 PH |
8272 | return type0; |
8273 | ||
d2e4a39e | 8274 | templ_type = dynamic_template_type (type0); |
14f9c5c9 AS |
8275 | |
8276 | if (templ_type != NULL) | |
8277 | return template_to_fixed_record_type (templ_type, valaddr, address, dval); | |
4c4b4cd2 PH |
8278 | else if (variant_field_index (type0) >= 0) |
8279 | { | |
8280 | if (dval == NULL && valaddr == NULL && address == 0) | |
dda83cd7 | 8281 | return type0; |
4c4b4cd2 | 8282 | return to_record_with_fixed_variant_part (type0, valaddr, address, |
dda83cd7 | 8283 | dval); |
4c4b4cd2 | 8284 | } |
14f9c5c9 AS |
8285 | else |
8286 | { | |
9cdd0d12 | 8287 | type0->set_is_fixed_instance (true); |
14f9c5c9 AS |
8288 | return type0; |
8289 | } | |
8290 | ||
8291 | } | |
8292 | ||
8293 | /* An ordinary record type (with fixed-length fields) that describes | |
8294 | the value at (VAR_TYPE0, VALADDR, ADDRESS), where VAR_TYPE0 is a | |
8295 | union type. Any necessary discriminants' values should be in DVAL, | |
8296 | a record value. That is, this routine selects the appropriate | |
8297 | branch of the union at ADDR according to the discriminant value | |
b1f33ddd | 8298 | indicated in the union's type name. Returns VAR_TYPE0 itself if |
0963b4bd | 8299 | it represents a variant subject to a pragma Unchecked_Union. */ |
14f9c5c9 | 8300 | |
d2e4a39e | 8301 | static struct type * |
fc1a4b47 | 8302 | to_fixed_variant_branch_type (struct type *var_type0, const gdb_byte *valaddr, |
dda83cd7 | 8303 | CORE_ADDR address, struct value *dval) |
14f9c5c9 AS |
8304 | { |
8305 | int which; | |
d2e4a39e AS |
8306 | struct type *templ_type; |
8307 | struct type *var_type; | |
14f9c5c9 | 8308 | |
78134374 | 8309 | if (var_type0->code () == TYPE_CODE_PTR) |
14f9c5c9 | 8310 | var_type = TYPE_TARGET_TYPE (var_type0); |
d2e4a39e | 8311 | else |
14f9c5c9 AS |
8312 | var_type = var_type0; |
8313 | ||
8314 | templ_type = ada_find_parallel_type (var_type, "___XVU"); | |
8315 | ||
8316 | if (templ_type != NULL) | |
8317 | var_type = templ_type; | |
8318 | ||
b1f33ddd JB |
8319 | if (is_unchecked_variant (var_type, value_type (dval))) |
8320 | return var_type0; | |
d8af9068 | 8321 | which = ada_which_variant_applies (var_type, dval); |
14f9c5c9 AS |
8322 | |
8323 | if (which < 0) | |
e9bb382b | 8324 | return empty_record (var_type); |
14f9c5c9 | 8325 | else if (is_dynamic_field (var_type, which)) |
4c4b4cd2 | 8326 | return to_fixed_record_type |
940da03e | 8327 | (TYPE_TARGET_TYPE (var_type->field (which).type ()), |
d2e4a39e | 8328 | valaddr, address, dval); |
940da03e | 8329 | else if (variant_field_index (var_type->field (which).type ()) >= 0) |
d2e4a39e AS |
8330 | return |
8331 | to_fixed_record_type | |
940da03e | 8332 | (var_type->field (which).type (), valaddr, address, dval); |
14f9c5c9 | 8333 | else |
940da03e | 8334 | return var_type->field (which).type (); |
14f9c5c9 AS |
8335 | } |
8336 | ||
8908fca5 JB |
8337 | /* Assuming RANGE_TYPE is a TYPE_CODE_RANGE, return nonzero if |
8338 | ENCODING_TYPE, a type following the GNAT conventions for discrete | |
8339 | type encodings, only carries redundant information. */ | |
8340 | ||
8341 | static int | |
8342 | ada_is_redundant_range_encoding (struct type *range_type, | |
8343 | struct type *encoding_type) | |
8344 | { | |
108d56a4 | 8345 | const char *bounds_str; |
8908fca5 JB |
8346 | int n; |
8347 | LONGEST lo, hi; | |
8348 | ||
78134374 | 8349 | gdb_assert (range_type->code () == TYPE_CODE_RANGE); |
8908fca5 | 8350 | |
78134374 SM |
8351 | if (get_base_type (range_type)->code () |
8352 | != get_base_type (encoding_type)->code ()) | |
005e2509 JB |
8353 | { |
8354 | /* The compiler probably used a simple base type to describe | |
8355 | the range type instead of the range's actual base type, | |
8356 | expecting us to get the real base type from the encoding | |
8357 | anyway. In this situation, the encoding cannot be ignored | |
8358 | as redundant. */ | |
8359 | return 0; | |
8360 | } | |
8361 | ||
8908fca5 JB |
8362 | if (is_dynamic_type (range_type)) |
8363 | return 0; | |
8364 | ||
7d93a1e0 | 8365 | if (encoding_type->name () == NULL) |
8908fca5 JB |
8366 | return 0; |
8367 | ||
7d93a1e0 | 8368 | bounds_str = strstr (encoding_type->name (), "___XDLU_"); |
8908fca5 JB |
8369 | if (bounds_str == NULL) |
8370 | return 0; | |
8371 | ||
8372 | n = 8; /* Skip "___XDLU_". */ | |
8373 | if (!ada_scan_number (bounds_str, n, &lo, &n)) | |
8374 | return 0; | |
5537ddd0 | 8375 | if (range_type->bounds ()->low.const_val () != lo) |
8908fca5 JB |
8376 | return 0; |
8377 | ||
8378 | n += 2; /* Skip the "__" separator between the two bounds. */ | |
8379 | if (!ada_scan_number (bounds_str, n, &hi, &n)) | |
8380 | return 0; | |
5537ddd0 | 8381 | if (range_type->bounds ()->high.const_val () != hi) |
8908fca5 JB |
8382 | return 0; |
8383 | ||
8384 | return 1; | |
8385 | } | |
8386 | ||
8387 | /* Given the array type ARRAY_TYPE, return nonzero if DESC_TYPE, | |
8388 | a type following the GNAT encoding for describing array type | |
8389 | indices, only carries redundant information. */ | |
8390 | ||
8391 | static int | |
8392 | ada_is_redundant_index_type_desc (struct type *array_type, | |
8393 | struct type *desc_type) | |
8394 | { | |
8395 | struct type *this_layer = check_typedef (array_type); | |
8396 | int i; | |
8397 | ||
1f704f76 | 8398 | for (i = 0; i < desc_type->num_fields (); i++) |
8908fca5 | 8399 | { |
3d967001 | 8400 | if (!ada_is_redundant_range_encoding (this_layer->index_type (), |
940da03e | 8401 | desc_type->field (i).type ())) |
8908fca5 JB |
8402 | return 0; |
8403 | this_layer = check_typedef (TYPE_TARGET_TYPE (this_layer)); | |
8404 | } | |
8405 | ||
8406 | return 1; | |
8407 | } | |
8408 | ||
14f9c5c9 AS |
8409 | /* Assuming that TYPE0 is an array type describing the type of a value |
8410 | at ADDR, and that DVAL describes a record containing any | |
8411 | discriminants used in TYPE0, returns a type for the value that | |
8412 | contains no dynamic components (that is, no components whose sizes | |
8413 | are determined by run-time quantities). Unless IGNORE_TOO_BIG is | |
8414 | true, gives an error message if the resulting type's size is over | |
4c4b4cd2 | 8415 | varsize_limit. */ |
14f9c5c9 | 8416 | |
d2e4a39e AS |
8417 | static struct type * |
8418 | to_fixed_array_type (struct type *type0, struct value *dval, | |
dda83cd7 | 8419 | int ignore_too_big) |
14f9c5c9 | 8420 | { |
d2e4a39e AS |
8421 | struct type *index_type_desc; |
8422 | struct type *result; | |
ad82864c | 8423 | int constrained_packed_array_p; |
931e5bc3 | 8424 | static const char *xa_suffix = "___XA"; |
14f9c5c9 | 8425 | |
b0dd7688 | 8426 | type0 = ada_check_typedef (type0); |
22c4c60c | 8427 | if (type0->is_fixed_instance ()) |
4c4b4cd2 | 8428 | return type0; |
14f9c5c9 | 8429 | |
ad82864c JB |
8430 | constrained_packed_array_p = ada_is_constrained_packed_array_type (type0); |
8431 | if (constrained_packed_array_p) | |
75fd6a26 TT |
8432 | { |
8433 | type0 = decode_constrained_packed_array_type (type0); | |
8434 | if (type0 == nullptr) | |
8435 | error (_("could not decode constrained packed array type")); | |
8436 | } | |
284614f0 | 8437 | |
931e5bc3 JG |
8438 | index_type_desc = ada_find_parallel_type (type0, xa_suffix); |
8439 | ||
8440 | /* As mentioned in exp_dbug.ads, for non bit-packed arrays an | |
8441 | encoding suffixed with 'P' may still be generated. If so, | |
8442 | it should be used to find the XA type. */ | |
8443 | ||
8444 | if (index_type_desc == NULL) | |
8445 | { | |
1da0522e | 8446 | const char *type_name = ada_type_name (type0); |
931e5bc3 | 8447 | |
1da0522e | 8448 | if (type_name != NULL) |
931e5bc3 | 8449 | { |
1da0522e | 8450 | const int len = strlen (type_name); |
931e5bc3 JG |
8451 | char *name = (char *) alloca (len + strlen (xa_suffix)); |
8452 | ||
1da0522e | 8453 | if (type_name[len - 1] == 'P') |
931e5bc3 | 8454 | { |
1da0522e | 8455 | strcpy (name, type_name); |
931e5bc3 JG |
8456 | strcpy (name + len - 1, xa_suffix); |
8457 | index_type_desc = ada_find_parallel_type_with_name (type0, name); | |
8458 | } | |
8459 | } | |
8460 | } | |
8461 | ||
28c85d6c | 8462 | ada_fixup_array_indexes_type (index_type_desc); |
8908fca5 JB |
8463 | if (index_type_desc != NULL |
8464 | && ada_is_redundant_index_type_desc (type0, index_type_desc)) | |
8465 | { | |
8466 | /* Ignore this ___XA parallel type, as it does not bring any | |
8467 | useful information. This allows us to avoid creating fixed | |
8468 | versions of the array's index types, which would be identical | |
8469 | to the original ones. This, in turn, can also help avoid | |
8470 | the creation of fixed versions of the array itself. */ | |
8471 | index_type_desc = NULL; | |
8472 | } | |
8473 | ||
14f9c5c9 AS |
8474 | if (index_type_desc == NULL) |
8475 | { | |
61ee279c | 8476 | struct type *elt_type0 = ada_check_typedef (TYPE_TARGET_TYPE (type0)); |
5b4ee69b | 8477 | |
14f9c5c9 | 8478 | /* NOTE: elt_type---the fixed version of elt_type0---should never |
dda83cd7 SM |
8479 | depend on the contents of the array in properly constructed |
8480 | debugging data. */ | |
529cad9c | 8481 | /* Create a fixed version of the array element type. |
dda83cd7 SM |
8482 | We're not providing the address of an element here, |
8483 | and thus the actual object value cannot be inspected to do | |
8484 | the conversion. This should not be a problem, since arrays of | |
8485 | unconstrained objects are not allowed. In particular, all | |
8486 | the elements of an array of a tagged type should all be of | |
8487 | the same type specified in the debugging info. No need to | |
8488 | consult the object tag. */ | |
1ed6ede0 | 8489 | struct type *elt_type = ada_to_fixed_type (elt_type0, 0, 0, dval, 1); |
14f9c5c9 | 8490 | |
284614f0 JB |
8491 | /* Make sure we always create a new array type when dealing with |
8492 | packed array types, since we're going to fix-up the array | |
8493 | type length and element bitsize a little further down. */ | |
ad82864c | 8494 | if (elt_type0 == elt_type && !constrained_packed_array_p) |
dda83cd7 | 8495 | result = type0; |
14f9c5c9 | 8496 | else |
dda83cd7 SM |
8497 | result = create_array_type (alloc_type_copy (type0), |
8498 | elt_type, type0->index_type ()); | |
14f9c5c9 AS |
8499 | } |
8500 | else | |
8501 | { | |
8502 | int i; | |
8503 | struct type *elt_type0; | |
8504 | ||
8505 | elt_type0 = type0; | |
1f704f76 | 8506 | for (i = index_type_desc->num_fields (); i > 0; i -= 1) |
dda83cd7 | 8507 | elt_type0 = TYPE_TARGET_TYPE (elt_type0); |
14f9c5c9 AS |
8508 | |
8509 | /* NOTE: result---the fixed version of elt_type0---should never | |
dda83cd7 SM |
8510 | depend on the contents of the array in properly constructed |
8511 | debugging data. */ | |
529cad9c | 8512 | /* Create a fixed version of the array element type. |
dda83cd7 SM |
8513 | We're not providing the address of an element here, |
8514 | and thus the actual object value cannot be inspected to do | |
8515 | the conversion. This should not be a problem, since arrays of | |
8516 | unconstrained objects are not allowed. In particular, all | |
8517 | the elements of an array of a tagged type should all be of | |
8518 | the same type specified in the debugging info. No need to | |
8519 | consult the object tag. */ | |
1ed6ede0 | 8520 | result = |
dda83cd7 | 8521 | ada_to_fixed_type (ada_check_typedef (elt_type0), 0, 0, dval, 1); |
1ce677a4 UW |
8522 | |
8523 | elt_type0 = type0; | |
1f704f76 | 8524 | for (i = index_type_desc->num_fields () - 1; i >= 0; i -= 1) |
dda83cd7 SM |
8525 | { |
8526 | struct type *range_type = | |
8527 | to_fixed_range_type (index_type_desc->field (i).type (), dval); | |
5b4ee69b | 8528 | |
dda83cd7 SM |
8529 | result = create_array_type (alloc_type_copy (elt_type0), |
8530 | result, range_type); | |
1ce677a4 | 8531 | elt_type0 = TYPE_TARGET_TYPE (elt_type0); |
dda83cd7 | 8532 | } |
d2e4a39e | 8533 | if (!ignore_too_big && TYPE_LENGTH (result) > varsize_limit) |
dda83cd7 | 8534 | error (_("array type with dynamic size is larger than varsize-limit")); |
14f9c5c9 AS |
8535 | } |
8536 | ||
2e6fda7d JB |
8537 | /* We want to preserve the type name. This can be useful when |
8538 | trying to get the type name of a value that has already been | |
8539 | printed (for instance, if the user did "print VAR; whatis $". */ | |
7d93a1e0 | 8540 | result->set_name (type0->name ()); |
2e6fda7d | 8541 | |
ad82864c | 8542 | if (constrained_packed_array_p) |
284614f0 JB |
8543 | { |
8544 | /* So far, the resulting type has been created as if the original | |
8545 | type was a regular (non-packed) array type. As a result, the | |
8546 | bitsize of the array elements needs to be set again, and the array | |
8547 | length needs to be recomputed based on that bitsize. */ | |
8548 | int len = TYPE_LENGTH (result) / TYPE_LENGTH (TYPE_TARGET_TYPE (result)); | |
8549 | int elt_bitsize = TYPE_FIELD_BITSIZE (type0, 0); | |
8550 | ||
8551 | TYPE_FIELD_BITSIZE (result, 0) = TYPE_FIELD_BITSIZE (type0, 0); | |
8552 | TYPE_LENGTH (result) = len * elt_bitsize / HOST_CHAR_BIT; | |
8553 | if (TYPE_LENGTH (result) * HOST_CHAR_BIT < len * elt_bitsize) | |
dda83cd7 | 8554 | TYPE_LENGTH (result)++; |
284614f0 JB |
8555 | } |
8556 | ||
9cdd0d12 | 8557 | result->set_is_fixed_instance (true); |
14f9c5c9 | 8558 | return result; |
d2e4a39e | 8559 | } |
14f9c5c9 AS |
8560 | |
8561 | ||
8562 | /* A standard type (containing no dynamically sized components) | |
8563 | corresponding to TYPE for the value (TYPE, VALADDR, ADDRESS) | |
8564 | DVAL describes a record containing any discriminants used in TYPE0, | |
4c4b4cd2 | 8565 | and may be NULL if there are none, or if the object of type TYPE at |
529cad9c PH |
8566 | ADDRESS or in VALADDR contains these discriminants. |
8567 | ||
1ed6ede0 JB |
8568 | If CHECK_TAG is not null, in the case of tagged types, this function |
8569 | attempts to locate the object's tag and use it to compute the actual | |
8570 | type. However, when ADDRESS is null, we cannot use it to determine the | |
8571 | location of the tag, and therefore compute the tagged type's actual type. | |
8572 | So we return the tagged type without consulting the tag. */ | |
529cad9c | 8573 | |
f192137b JB |
8574 | static struct type * |
8575 | ada_to_fixed_type_1 (struct type *type, const gdb_byte *valaddr, | |
dda83cd7 | 8576 | CORE_ADDR address, struct value *dval, int check_tag) |
14f9c5c9 | 8577 | { |
61ee279c | 8578 | type = ada_check_typedef (type); |
8ecb59f8 TT |
8579 | |
8580 | /* Only un-fixed types need to be handled here. */ | |
8581 | if (!HAVE_GNAT_AUX_INFO (type)) | |
8582 | return type; | |
8583 | ||
78134374 | 8584 | switch (type->code ()) |
d2e4a39e AS |
8585 | { |
8586 | default: | |
14f9c5c9 | 8587 | return type; |
d2e4a39e | 8588 | case TYPE_CODE_STRUCT: |
4c4b4cd2 | 8589 | { |
dda83cd7 SM |
8590 | struct type *static_type = to_static_fixed_type (type); |
8591 | struct type *fixed_record_type = | |
8592 | to_fixed_record_type (type, valaddr, address, NULL); | |
8593 | ||
8594 | /* If STATIC_TYPE is a tagged type and we know the object's address, | |
8595 | then we can determine its tag, and compute the object's actual | |
8596 | type from there. Note that we have to use the fixed record | |
8597 | type (the parent part of the record may have dynamic fields | |
8598 | and the way the location of _tag is expressed may depend on | |
8599 | them). */ | |
8600 | ||
8601 | if (check_tag && address != 0 && ada_is_tagged_type (static_type, 0)) | |
8602 | { | |
b50d69b5 JG |
8603 | struct value *tag = |
8604 | value_tag_from_contents_and_address | |
8605 | (fixed_record_type, | |
8606 | valaddr, | |
8607 | address); | |
8608 | struct type *real_type = type_from_tag (tag); | |
8609 | struct value *obj = | |
8610 | value_from_contents_and_address (fixed_record_type, | |
8611 | valaddr, | |
8612 | address); | |
dda83cd7 SM |
8613 | fixed_record_type = value_type (obj); |
8614 | if (real_type != NULL) | |
8615 | return to_fixed_record_type | |
b50d69b5 JG |
8616 | (real_type, NULL, |
8617 | value_address (ada_tag_value_at_base_address (obj)), NULL); | |
dda83cd7 SM |
8618 | } |
8619 | ||
8620 | /* Check to see if there is a parallel ___XVZ variable. | |
8621 | If there is, then it provides the actual size of our type. */ | |
8622 | else if (ada_type_name (fixed_record_type) != NULL) | |
8623 | { | |
8624 | const char *name = ada_type_name (fixed_record_type); | |
8625 | char *xvz_name | |
224c3ddb | 8626 | = (char *) alloca (strlen (name) + 7 /* "___XVZ\0" */); |
eccab96d | 8627 | bool xvz_found = false; |
dda83cd7 | 8628 | LONGEST size; |
4af88198 | 8629 | |
dda83cd7 | 8630 | xsnprintf (xvz_name, strlen (name) + 7, "%s___XVZ", name); |
a70b8144 | 8631 | try |
eccab96d JB |
8632 | { |
8633 | xvz_found = get_int_var_value (xvz_name, size); | |
8634 | } | |
230d2906 | 8635 | catch (const gdb_exception_error &except) |
eccab96d JB |
8636 | { |
8637 | /* We found the variable, but somehow failed to read | |
8638 | its value. Rethrow the same error, but with a little | |
8639 | bit more information, to help the user understand | |
8640 | what went wrong (Eg: the variable might have been | |
8641 | optimized out). */ | |
8642 | throw_error (except.error, | |
8643 | _("unable to read value of %s (%s)"), | |
3d6e9d23 | 8644 | xvz_name, except.what ()); |
eccab96d | 8645 | } |
eccab96d | 8646 | |
dda83cd7 SM |
8647 | if (xvz_found && TYPE_LENGTH (fixed_record_type) != size) |
8648 | { | |
8649 | fixed_record_type = copy_type (fixed_record_type); | |
8650 | TYPE_LENGTH (fixed_record_type) = size; | |
8651 | ||
8652 | /* The FIXED_RECORD_TYPE may have be a stub. We have | |
8653 | observed this when the debugging info is STABS, and | |
8654 | apparently it is something that is hard to fix. | |
8655 | ||
8656 | In practice, we don't need the actual type definition | |
8657 | at all, because the presence of the XVZ variable allows us | |
8658 | to assume that there must be a XVS type as well, which we | |
8659 | should be able to use later, when we need the actual type | |
8660 | definition. | |
8661 | ||
8662 | In the meantime, pretend that the "fixed" type we are | |
8663 | returning is NOT a stub, because this can cause trouble | |
8664 | when using this type to create new types targeting it. | |
8665 | Indeed, the associated creation routines often check | |
8666 | whether the target type is a stub and will try to replace | |
8667 | it, thus using a type with the wrong size. This, in turn, | |
8668 | might cause the new type to have the wrong size too. | |
8669 | Consider the case of an array, for instance, where the size | |
8670 | of the array is computed from the number of elements in | |
8671 | our array multiplied by the size of its element. */ | |
b4b73759 | 8672 | fixed_record_type->set_is_stub (false); |
dda83cd7 SM |
8673 | } |
8674 | } | |
8675 | return fixed_record_type; | |
4c4b4cd2 | 8676 | } |
d2e4a39e | 8677 | case TYPE_CODE_ARRAY: |
4c4b4cd2 | 8678 | return to_fixed_array_type (type, dval, 1); |
d2e4a39e AS |
8679 | case TYPE_CODE_UNION: |
8680 | if (dval == NULL) | |
dda83cd7 | 8681 | return type; |
d2e4a39e | 8682 | else |
dda83cd7 | 8683 | return to_fixed_variant_branch_type (type, valaddr, address, dval); |
d2e4a39e | 8684 | } |
14f9c5c9 AS |
8685 | } |
8686 | ||
f192137b JB |
8687 | /* The same as ada_to_fixed_type_1, except that it preserves the type |
8688 | if it is a TYPE_CODE_TYPEDEF of a type that is already fixed. | |
96dbd2c1 JB |
8689 | |
8690 | The typedef layer needs be preserved in order to differentiate between | |
8691 | arrays and array pointers when both types are implemented using the same | |
8692 | fat pointer. In the array pointer case, the pointer is encoded as | |
8693 | a typedef of the pointer type. For instance, considering: | |
8694 | ||
8695 | type String_Access is access String; | |
8696 | S1 : String_Access := null; | |
8697 | ||
8698 | To the debugger, S1 is defined as a typedef of type String. But | |
8699 | to the user, it is a pointer. So if the user tries to print S1, | |
8700 | we should not dereference the array, but print the array address | |
8701 | instead. | |
8702 | ||
8703 | If we didn't preserve the typedef layer, we would lose the fact that | |
8704 | the type is to be presented as a pointer (needs de-reference before | |
8705 | being printed). And we would also use the source-level type name. */ | |
f192137b JB |
8706 | |
8707 | struct type * | |
8708 | ada_to_fixed_type (struct type *type, const gdb_byte *valaddr, | |
dda83cd7 | 8709 | CORE_ADDR address, struct value *dval, int check_tag) |
f192137b JB |
8710 | |
8711 | { | |
8712 | struct type *fixed_type = | |
8713 | ada_to_fixed_type_1 (type, valaddr, address, dval, check_tag); | |
8714 | ||
96dbd2c1 JB |
8715 | /* If TYPE is a typedef and its target type is the same as the FIXED_TYPE, |
8716 | then preserve the typedef layer. | |
8717 | ||
8718 | Implementation note: We can only check the main-type portion of | |
8719 | the TYPE and FIXED_TYPE, because eliminating the typedef layer | |
8720 | from TYPE now returns a type that has the same instance flags | |
8721 | as TYPE. For instance, if TYPE is a "typedef const", and its | |
8722 | target type is a "struct", then the typedef elimination will return | |
8723 | a "const" version of the target type. See check_typedef for more | |
8724 | details about how the typedef layer elimination is done. | |
8725 | ||
8726 | brobecker/2010-11-19: It seems to me that the only case where it is | |
8727 | useful to preserve the typedef layer is when dealing with fat pointers. | |
8728 | Perhaps, we could add a check for that and preserve the typedef layer | |
85102364 | 8729 | only in that situation. But this seems unnecessary so far, probably |
96dbd2c1 JB |
8730 | because we call check_typedef/ada_check_typedef pretty much everywhere. |
8731 | */ | |
78134374 | 8732 | if (type->code () == TYPE_CODE_TYPEDEF |
720d1a40 | 8733 | && (TYPE_MAIN_TYPE (ada_typedef_target_type (type)) |
96dbd2c1 | 8734 | == TYPE_MAIN_TYPE (fixed_type))) |
f192137b JB |
8735 | return type; |
8736 | ||
8737 | return fixed_type; | |
8738 | } | |
8739 | ||
14f9c5c9 | 8740 | /* A standard (static-sized) type corresponding as well as possible to |
4c4b4cd2 | 8741 | TYPE0, but based on no runtime data. */ |
14f9c5c9 | 8742 | |
d2e4a39e AS |
8743 | static struct type * |
8744 | to_static_fixed_type (struct type *type0) | |
14f9c5c9 | 8745 | { |
d2e4a39e | 8746 | struct type *type; |
14f9c5c9 AS |
8747 | |
8748 | if (type0 == NULL) | |
8749 | return NULL; | |
8750 | ||
22c4c60c | 8751 | if (type0->is_fixed_instance ()) |
4c4b4cd2 PH |
8752 | return type0; |
8753 | ||
61ee279c | 8754 | type0 = ada_check_typedef (type0); |
d2e4a39e | 8755 | |
78134374 | 8756 | switch (type0->code ()) |
14f9c5c9 AS |
8757 | { |
8758 | default: | |
8759 | return type0; | |
8760 | case TYPE_CODE_STRUCT: | |
8761 | type = dynamic_template_type (type0); | |
d2e4a39e | 8762 | if (type != NULL) |
dda83cd7 | 8763 | return template_to_static_fixed_type (type); |
4c4b4cd2 | 8764 | else |
dda83cd7 | 8765 | return template_to_static_fixed_type (type0); |
14f9c5c9 AS |
8766 | case TYPE_CODE_UNION: |
8767 | type = ada_find_parallel_type (type0, "___XVU"); | |
8768 | if (type != NULL) | |
dda83cd7 | 8769 | return template_to_static_fixed_type (type); |
4c4b4cd2 | 8770 | else |
dda83cd7 | 8771 | return template_to_static_fixed_type (type0); |
14f9c5c9 AS |
8772 | } |
8773 | } | |
8774 | ||
4c4b4cd2 PH |
8775 | /* A static approximation of TYPE with all type wrappers removed. */ |
8776 | ||
d2e4a39e AS |
8777 | static struct type * |
8778 | static_unwrap_type (struct type *type) | |
14f9c5c9 AS |
8779 | { |
8780 | if (ada_is_aligner_type (type)) | |
8781 | { | |
940da03e | 8782 | struct type *type1 = ada_check_typedef (type)->field (0).type (); |
14f9c5c9 | 8783 | if (ada_type_name (type1) == NULL) |
d0e39ea2 | 8784 | type1->set_name (ada_type_name (type)); |
14f9c5c9 AS |
8785 | |
8786 | return static_unwrap_type (type1); | |
8787 | } | |
d2e4a39e | 8788 | else |
14f9c5c9 | 8789 | { |
d2e4a39e | 8790 | struct type *raw_real_type = ada_get_base_type (type); |
5b4ee69b | 8791 | |
d2e4a39e | 8792 | if (raw_real_type == type) |
dda83cd7 | 8793 | return type; |
14f9c5c9 | 8794 | else |
dda83cd7 | 8795 | return to_static_fixed_type (raw_real_type); |
14f9c5c9 AS |
8796 | } |
8797 | } | |
8798 | ||
8799 | /* In some cases, incomplete and private types require | |
4c4b4cd2 | 8800 | cross-references that are not resolved as records (for example, |
14f9c5c9 AS |
8801 | type Foo; |
8802 | type FooP is access Foo; | |
8803 | V: FooP; | |
8804 | type Foo is array ...; | |
4c4b4cd2 | 8805 | ). In these cases, since there is no mechanism for producing |
14f9c5c9 AS |
8806 | cross-references to such types, we instead substitute for FooP a |
8807 | stub enumeration type that is nowhere resolved, and whose tag is | |
4c4b4cd2 | 8808 | the name of the actual type. Call these types "non-record stubs". */ |
14f9c5c9 AS |
8809 | |
8810 | /* A type equivalent to TYPE that is not a non-record stub, if one | |
4c4b4cd2 PH |
8811 | exists, otherwise TYPE. */ |
8812 | ||
d2e4a39e | 8813 | struct type * |
61ee279c | 8814 | ada_check_typedef (struct type *type) |
14f9c5c9 | 8815 | { |
727e3d2e JB |
8816 | if (type == NULL) |
8817 | return NULL; | |
8818 | ||
736ade86 XR |
8819 | /* If our type is an access to an unconstrained array, which is encoded |
8820 | as a TYPE_CODE_TYPEDEF of a fat pointer, then we're done. | |
720d1a40 JB |
8821 | We don't want to strip the TYPE_CODE_TYPDEF layer, because this is |
8822 | what allows us to distinguish between fat pointers that represent | |
8823 | array types, and fat pointers that represent array access types | |
8824 | (in both cases, the compiler implements them as fat pointers). */ | |
736ade86 | 8825 | if (ada_is_access_to_unconstrained_array (type)) |
720d1a40 JB |
8826 | return type; |
8827 | ||
f168693b | 8828 | type = check_typedef (type); |
78134374 | 8829 | if (type == NULL || type->code () != TYPE_CODE_ENUM |
e46d3488 | 8830 | || !type->is_stub () |
7d93a1e0 | 8831 | || type->name () == NULL) |
14f9c5c9 | 8832 | return type; |
d2e4a39e | 8833 | else |
14f9c5c9 | 8834 | { |
7d93a1e0 | 8835 | const char *name = type->name (); |
d2e4a39e | 8836 | struct type *type1 = ada_find_any_type (name); |
5b4ee69b | 8837 | |
05e522ef | 8838 | if (type1 == NULL) |
dda83cd7 | 8839 | return type; |
05e522ef JB |
8840 | |
8841 | /* TYPE1 might itself be a TYPE_CODE_TYPEDEF (this can happen with | |
8842 | stubs pointing to arrays, as we don't create symbols for array | |
3a867c22 JB |
8843 | types, only for the typedef-to-array types). If that's the case, |
8844 | strip the typedef layer. */ | |
78134374 | 8845 | if (type1->code () == TYPE_CODE_TYPEDEF) |
3a867c22 JB |
8846 | type1 = ada_check_typedef (type1); |
8847 | ||
8848 | return type1; | |
14f9c5c9 AS |
8849 | } |
8850 | } | |
8851 | ||
8852 | /* A value representing the data at VALADDR/ADDRESS as described by | |
8853 | type TYPE0, but with a standard (static-sized) type that correctly | |
8854 | describes it. If VAL0 is not NULL and TYPE0 already is a standard | |
8855 | type, then return VAL0 [this feature is simply to avoid redundant | |
4c4b4cd2 | 8856 | creation of struct values]. */ |
14f9c5c9 | 8857 | |
4c4b4cd2 PH |
8858 | static struct value * |
8859 | ada_to_fixed_value_create (struct type *type0, CORE_ADDR address, | |
dda83cd7 | 8860 | struct value *val0) |
14f9c5c9 | 8861 | { |
1ed6ede0 | 8862 | struct type *type = ada_to_fixed_type (type0, 0, address, NULL, 1); |
5b4ee69b | 8863 | |
14f9c5c9 AS |
8864 | if (type == type0 && val0 != NULL) |
8865 | return val0; | |
cc0e770c JB |
8866 | |
8867 | if (VALUE_LVAL (val0) != lval_memory) | |
8868 | { | |
8869 | /* Our value does not live in memory; it could be a convenience | |
8870 | variable, for instance. Create a not_lval value using val0's | |
8871 | contents. */ | |
8872 | return value_from_contents (type, value_contents (val0)); | |
8873 | } | |
8874 | ||
8875 | return value_from_contents_and_address (type, 0, address); | |
4c4b4cd2 PH |
8876 | } |
8877 | ||
8878 | /* A value representing VAL, but with a standard (static-sized) type | |
8879 | that correctly describes it. Does not necessarily create a new | |
8880 | value. */ | |
8881 | ||
0c3acc09 | 8882 | struct value * |
4c4b4cd2 PH |
8883 | ada_to_fixed_value (struct value *val) |
8884 | { | |
c48db5ca | 8885 | val = unwrap_value (val); |
d8ce9127 | 8886 | val = ada_to_fixed_value_create (value_type (val), value_address (val), val); |
c48db5ca | 8887 | return val; |
14f9c5c9 | 8888 | } |
d2e4a39e | 8889 | \f |
14f9c5c9 | 8890 | |
14f9c5c9 AS |
8891 | /* Attributes */ |
8892 | ||
4c4b4cd2 PH |
8893 | /* Table mapping attribute numbers to names. |
8894 | NOTE: Keep up to date with enum ada_attribute definition in ada-lang.h. */ | |
14f9c5c9 | 8895 | |
27087b7f | 8896 | static const char * const attribute_names[] = { |
14f9c5c9 AS |
8897 | "<?>", |
8898 | ||
d2e4a39e | 8899 | "first", |
14f9c5c9 AS |
8900 | "last", |
8901 | "length", | |
8902 | "image", | |
14f9c5c9 AS |
8903 | "max", |
8904 | "min", | |
4c4b4cd2 PH |
8905 | "modulus", |
8906 | "pos", | |
8907 | "size", | |
8908 | "tag", | |
14f9c5c9 | 8909 | "val", |
14f9c5c9 AS |
8910 | 0 |
8911 | }; | |
8912 | ||
de93309a | 8913 | static const char * |
4c4b4cd2 | 8914 | ada_attribute_name (enum exp_opcode n) |
14f9c5c9 | 8915 | { |
4c4b4cd2 PH |
8916 | if (n >= OP_ATR_FIRST && n <= (int) OP_ATR_VAL) |
8917 | return attribute_names[n - OP_ATR_FIRST + 1]; | |
14f9c5c9 AS |
8918 | else |
8919 | return attribute_names[0]; | |
8920 | } | |
8921 | ||
4c4b4cd2 | 8922 | /* Evaluate the 'POS attribute applied to ARG. */ |
14f9c5c9 | 8923 | |
4c4b4cd2 PH |
8924 | static LONGEST |
8925 | pos_atr (struct value *arg) | |
14f9c5c9 | 8926 | { |
24209737 PH |
8927 | struct value *val = coerce_ref (arg); |
8928 | struct type *type = value_type (val); | |
aa715135 | 8929 | LONGEST result; |
14f9c5c9 | 8930 | |
d2e4a39e | 8931 | if (!discrete_type_p (type)) |
323e0a4a | 8932 | error (_("'POS only defined on discrete types")); |
14f9c5c9 | 8933 | |
aa715135 JG |
8934 | if (!discrete_position (type, value_as_long (val), &result)) |
8935 | error (_("enumeration value is invalid: can't find 'POS")); | |
14f9c5c9 | 8936 | |
aa715135 | 8937 | return result; |
4c4b4cd2 PH |
8938 | } |
8939 | ||
8940 | static struct value * | |
3cb382c9 | 8941 | value_pos_atr (struct type *type, struct value *arg) |
4c4b4cd2 | 8942 | { |
3cb382c9 | 8943 | return value_from_longest (type, pos_atr (arg)); |
14f9c5c9 AS |
8944 | } |
8945 | ||
4c4b4cd2 | 8946 | /* Evaluate the TYPE'VAL attribute applied to ARG. */ |
14f9c5c9 | 8947 | |
d2e4a39e | 8948 | static struct value * |
53a47a3e | 8949 | val_atr (struct type *type, LONGEST val) |
14f9c5c9 | 8950 | { |
53a47a3e | 8951 | gdb_assert (discrete_type_p (type)); |
0bc2354b TT |
8952 | if (type->code () == TYPE_CODE_RANGE) |
8953 | type = TYPE_TARGET_TYPE (type); | |
78134374 | 8954 | if (type->code () == TYPE_CODE_ENUM) |
14f9c5c9 | 8955 | { |
53a47a3e | 8956 | if (val < 0 || val >= type->num_fields ()) |
dda83cd7 | 8957 | error (_("argument to 'VAL out of range")); |
53a47a3e | 8958 | val = TYPE_FIELD_ENUMVAL (type, val); |
14f9c5c9 | 8959 | } |
53a47a3e TT |
8960 | return value_from_longest (type, val); |
8961 | } | |
8962 | ||
8963 | static struct value * | |
8964 | value_val_atr (struct type *type, struct value *arg) | |
8965 | { | |
8966 | if (!discrete_type_p (type)) | |
8967 | error (_("'VAL only defined on discrete types")); | |
8968 | if (!integer_type_p (value_type (arg))) | |
8969 | error (_("'VAL requires integral argument")); | |
8970 | ||
8971 | return val_atr (type, value_as_long (arg)); | |
14f9c5c9 | 8972 | } |
14f9c5c9 | 8973 | \f |
d2e4a39e | 8974 | |
dda83cd7 | 8975 | /* Evaluation */ |
14f9c5c9 | 8976 | |
4c4b4cd2 PH |
8977 | /* True if TYPE appears to be an Ada character type. |
8978 | [At the moment, this is true only for Character and Wide_Character; | |
8979 | It is a heuristic test that could stand improvement]. */ | |
14f9c5c9 | 8980 | |
fc913e53 | 8981 | bool |
d2e4a39e | 8982 | ada_is_character_type (struct type *type) |
14f9c5c9 | 8983 | { |
7b9f71f2 JB |
8984 | const char *name; |
8985 | ||
8986 | /* If the type code says it's a character, then assume it really is, | |
8987 | and don't check any further. */ | |
78134374 | 8988 | if (type->code () == TYPE_CODE_CHAR) |
fc913e53 | 8989 | return true; |
7b9f71f2 JB |
8990 | |
8991 | /* Otherwise, assume it's a character type iff it is a discrete type | |
8992 | with a known character type name. */ | |
8993 | name = ada_type_name (type); | |
8994 | return (name != NULL | |
dda83cd7 SM |
8995 | && (type->code () == TYPE_CODE_INT |
8996 | || type->code () == TYPE_CODE_RANGE) | |
8997 | && (strcmp (name, "character") == 0 | |
8998 | || strcmp (name, "wide_character") == 0 | |
8999 | || strcmp (name, "wide_wide_character") == 0 | |
9000 | || strcmp (name, "unsigned char") == 0)); | |
14f9c5c9 AS |
9001 | } |
9002 | ||
4c4b4cd2 | 9003 | /* True if TYPE appears to be an Ada string type. */ |
14f9c5c9 | 9004 | |
fc913e53 | 9005 | bool |
ebf56fd3 | 9006 | ada_is_string_type (struct type *type) |
14f9c5c9 | 9007 | { |
61ee279c | 9008 | type = ada_check_typedef (type); |
d2e4a39e | 9009 | if (type != NULL |
78134374 | 9010 | && type->code () != TYPE_CODE_PTR |
76a01679 | 9011 | && (ada_is_simple_array_type (type) |
dda83cd7 | 9012 | || ada_is_array_descriptor_type (type)) |
14f9c5c9 AS |
9013 | && ada_array_arity (type) == 1) |
9014 | { | |
9015 | struct type *elttype = ada_array_element_type (type, 1); | |
9016 | ||
9017 | return ada_is_character_type (elttype); | |
9018 | } | |
d2e4a39e | 9019 | else |
fc913e53 | 9020 | return false; |
14f9c5c9 AS |
9021 | } |
9022 | ||
5bf03f13 JB |
9023 | /* The compiler sometimes provides a parallel XVS type for a given |
9024 | PAD type. Normally, it is safe to follow the PAD type directly, | |
9025 | but older versions of the compiler have a bug that causes the offset | |
9026 | of its "F" field to be wrong. Following that field in that case | |
9027 | would lead to incorrect results, but this can be worked around | |
9028 | by ignoring the PAD type and using the associated XVS type instead. | |
9029 | ||
9030 | Set to True if the debugger should trust the contents of PAD types. | |
9031 | Otherwise, ignore the PAD type if there is a parallel XVS type. */ | |
491144b5 | 9032 | static bool trust_pad_over_xvs = true; |
14f9c5c9 AS |
9033 | |
9034 | /* True if TYPE is a struct type introduced by the compiler to force the | |
9035 | alignment of a value. Such types have a single field with a | |
4c4b4cd2 | 9036 | distinctive name. */ |
14f9c5c9 AS |
9037 | |
9038 | int | |
ebf56fd3 | 9039 | ada_is_aligner_type (struct type *type) |
14f9c5c9 | 9040 | { |
61ee279c | 9041 | type = ada_check_typedef (type); |
714e53ab | 9042 | |
5bf03f13 | 9043 | if (!trust_pad_over_xvs && ada_find_parallel_type (type, "___XVS") != NULL) |
714e53ab PH |
9044 | return 0; |
9045 | ||
78134374 | 9046 | return (type->code () == TYPE_CODE_STRUCT |
dda83cd7 SM |
9047 | && type->num_fields () == 1 |
9048 | && strcmp (TYPE_FIELD_NAME (type, 0), "F") == 0); | |
14f9c5c9 AS |
9049 | } |
9050 | ||
9051 | /* If there is an ___XVS-convention type parallel to SUBTYPE, return | |
4c4b4cd2 | 9052 | the parallel type. */ |
14f9c5c9 | 9053 | |
d2e4a39e AS |
9054 | struct type * |
9055 | ada_get_base_type (struct type *raw_type) | |
14f9c5c9 | 9056 | { |
d2e4a39e AS |
9057 | struct type *real_type_namer; |
9058 | struct type *raw_real_type; | |
14f9c5c9 | 9059 | |
78134374 | 9060 | if (raw_type == NULL || raw_type->code () != TYPE_CODE_STRUCT) |
14f9c5c9 AS |
9061 | return raw_type; |
9062 | ||
284614f0 JB |
9063 | if (ada_is_aligner_type (raw_type)) |
9064 | /* The encoding specifies that we should always use the aligner type. | |
9065 | So, even if this aligner type has an associated XVS type, we should | |
9066 | simply ignore it. | |
9067 | ||
9068 | According to the compiler gurus, an XVS type parallel to an aligner | |
9069 | type may exist because of a stabs limitation. In stabs, aligner | |
9070 | types are empty because the field has a variable-sized type, and | |
9071 | thus cannot actually be used as an aligner type. As a result, | |
9072 | we need the associated parallel XVS type to decode the type. | |
9073 | Since the policy in the compiler is to not change the internal | |
9074 | representation based on the debugging info format, we sometimes | |
9075 | end up having a redundant XVS type parallel to the aligner type. */ | |
9076 | return raw_type; | |
9077 | ||
14f9c5c9 | 9078 | real_type_namer = ada_find_parallel_type (raw_type, "___XVS"); |
d2e4a39e | 9079 | if (real_type_namer == NULL |
78134374 | 9080 | || real_type_namer->code () != TYPE_CODE_STRUCT |
1f704f76 | 9081 | || real_type_namer->num_fields () != 1) |
14f9c5c9 AS |
9082 | return raw_type; |
9083 | ||
940da03e | 9084 | if (real_type_namer->field (0).type ()->code () != TYPE_CODE_REF) |
f80d3ff2 JB |
9085 | { |
9086 | /* This is an older encoding form where the base type needs to be | |
85102364 | 9087 | looked up by name. We prefer the newer encoding because it is |
f80d3ff2 JB |
9088 | more efficient. */ |
9089 | raw_real_type = ada_find_any_type (TYPE_FIELD_NAME (real_type_namer, 0)); | |
9090 | if (raw_real_type == NULL) | |
9091 | return raw_type; | |
9092 | else | |
9093 | return raw_real_type; | |
9094 | } | |
9095 | ||
9096 | /* The field in our XVS type is a reference to the base type. */ | |
940da03e | 9097 | return TYPE_TARGET_TYPE (real_type_namer->field (0).type ()); |
d2e4a39e | 9098 | } |
14f9c5c9 | 9099 | |
4c4b4cd2 | 9100 | /* The type of value designated by TYPE, with all aligners removed. */ |
14f9c5c9 | 9101 | |
d2e4a39e AS |
9102 | struct type * |
9103 | ada_aligned_type (struct type *type) | |
14f9c5c9 AS |
9104 | { |
9105 | if (ada_is_aligner_type (type)) | |
940da03e | 9106 | return ada_aligned_type (type->field (0).type ()); |
14f9c5c9 AS |
9107 | else |
9108 | return ada_get_base_type (type); | |
9109 | } | |
9110 | ||
9111 | ||
9112 | /* The address of the aligned value in an object at address VALADDR | |
4c4b4cd2 | 9113 | having type TYPE. Assumes ada_is_aligner_type (TYPE). */ |
14f9c5c9 | 9114 | |
fc1a4b47 AC |
9115 | const gdb_byte * |
9116 | ada_aligned_value_addr (struct type *type, const gdb_byte *valaddr) | |
14f9c5c9 | 9117 | { |
d2e4a39e | 9118 | if (ada_is_aligner_type (type)) |
940da03e | 9119 | return ada_aligned_value_addr (type->field (0).type (), |
dda83cd7 SM |
9120 | valaddr + |
9121 | TYPE_FIELD_BITPOS (type, | |
9122 | 0) / TARGET_CHAR_BIT); | |
14f9c5c9 AS |
9123 | else |
9124 | return valaddr; | |
9125 | } | |
9126 | ||
4c4b4cd2 PH |
9127 | |
9128 | ||
14f9c5c9 | 9129 | /* The printed representation of an enumeration literal with encoded |
4c4b4cd2 | 9130 | name NAME. The value is good to the next call of ada_enum_name. */ |
d2e4a39e AS |
9131 | const char * |
9132 | ada_enum_name (const char *name) | |
14f9c5c9 | 9133 | { |
4c4b4cd2 PH |
9134 | static char *result; |
9135 | static size_t result_len = 0; | |
e6a959d6 | 9136 | const char *tmp; |
14f9c5c9 | 9137 | |
4c4b4cd2 PH |
9138 | /* First, unqualify the enumeration name: |
9139 | 1. Search for the last '.' character. If we find one, then skip | |
177b42fe | 9140 | all the preceding characters, the unqualified name starts |
76a01679 | 9141 | right after that dot. |
4c4b4cd2 | 9142 | 2. Otherwise, we may be debugging on a target where the compiler |
76a01679 JB |
9143 | translates dots into "__". Search forward for double underscores, |
9144 | but stop searching when we hit an overloading suffix, which is | |
9145 | of the form "__" followed by digits. */ | |
4c4b4cd2 | 9146 | |
c3e5cd34 PH |
9147 | tmp = strrchr (name, '.'); |
9148 | if (tmp != NULL) | |
4c4b4cd2 PH |
9149 | name = tmp + 1; |
9150 | else | |
14f9c5c9 | 9151 | { |
4c4b4cd2 | 9152 | while ((tmp = strstr (name, "__")) != NULL) |
dda83cd7 SM |
9153 | { |
9154 | if (isdigit (tmp[2])) | |
9155 | break; | |
9156 | else | |
9157 | name = tmp + 2; | |
9158 | } | |
14f9c5c9 AS |
9159 | } |
9160 | ||
9161 | if (name[0] == 'Q') | |
9162 | { | |
14f9c5c9 | 9163 | int v; |
5b4ee69b | 9164 | |
14f9c5c9 | 9165 | if (name[1] == 'U' || name[1] == 'W') |
dda83cd7 SM |
9166 | { |
9167 | if (sscanf (name + 2, "%x", &v) != 1) | |
9168 | return name; | |
9169 | } | |
272560b5 TT |
9170 | else if (((name[1] >= '0' && name[1] <= '9') |
9171 | || (name[1] >= 'a' && name[1] <= 'z')) | |
9172 | && name[2] == '\0') | |
9173 | { | |
9174 | GROW_VECT (result, result_len, 4); | |
9175 | xsnprintf (result, result_len, "'%c'", name[1]); | |
9176 | return result; | |
9177 | } | |
14f9c5c9 | 9178 | else |
dda83cd7 | 9179 | return name; |
14f9c5c9 | 9180 | |
4c4b4cd2 | 9181 | GROW_VECT (result, result_len, 16); |
14f9c5c9 | 9182 | if (isascii (v) && isprint (v)) |
dda83cd7 | 9183 | xsnprintf (result, result_len, "'%c'", v); |
14f9c5c9 | 9184 | else if (name[1] == 'U') |
dda83cd7 | 9185 | xsnprintf (result, result_len, "[\"%02x\"]", v); |
14f9c5c9 | 9186 | else |
dda83cd7 | 9187 | xsnprintf (result, result_len, "[\"%04x\"]", v); |
14f9c5c9 AS |
9188 | |
9189 | return result; | |
9190 | } | |
d2e4a39e | 9191 | else |
4c4b4cd2 | 9192 | { |
c3e5cd34 PH |
9193 | tmp = strstr (name, "__"); |
9194 | if (tmp == NULL) | |
9195 | tmp = strstr (name, "$"); | |
9196 | if (tmp != NULL) | |
dda83cd7 SM |
9197 | { |
9198 | GROW_VECT (result, result_len, tmp - name + 1); | |
9199 | strncpy (result, name, tmp - name); | |
9200 | result[tmp - name] = '\0'; | |
9201 | return result; | |
9202 | } | |
4c4b4cd2 PH |
9203 | |
9204 | return name; | |
9205 | } | |
14f9c5c9 AS |
9206 | } |
9207 | ||
14f9c5c9 AS |
9208 | /* Evaluate the subexpression of EXP starting at *POS as for |
9209 | evaluate_type, updating *POS to point just past the evaluated | |
4c4b4cd2 | 9210 | expression. */ |
14f9c5c9 | 9211 | |
d2e4a39e AS |
9212 | static struct value * |
9213 | evaluate_subexp_type (struct expression *exp, int *pos) | |
14f9c5c9 | 9214 | { |
fe1fe7ea | 9215 | return evaluate_subexp (nullptr, exp, pos, EVAL_AVOID_SIDE_EFFECTS); |
14f9c5c9 AS |
9216 | } |
9217 | ||
9218 | /* If VAL is wrapped in an aligner or subtype wrapper, return the | |
4c4b4cd2 | 9219 | value it wraps. */ |
14f9c5c9 | 9220 | |
d2e4a39e AS |
9221 | static struct value * |
9222 | unwrap_value (struct value *val) | |
14f9c5c9 | 9223 | { |
df407dfe | 9224 | struct type *type = ada_check_typedef (value_type (val)); |
5b4ee69b | 9225 | |
14f9c5c9 AS |
9226 | if (ada_is_aligner_type (type)) |
9227 | { | |
de4d072f | 9228 | struct value *v = ada_value_struct_elt (val, "F", 0); |
df407dfe | 9229 | struct type *val_type = ada_check_typedef (value_type (v)); |
5b4ee69b | 9230 | |
14f9c5c9 | 9231 | if (ada_type_name (val_type) == NULL) |
d0e39ea2 | 9232 | val_type->set_name (ada_type_name (type)); |
14f9c5c9 AS |
9233 | |
9234 | return unwrap_value (v); | |
9235 | } | |
d2e4a39e | 9236 | else |
14f9c5c9 | 9237 | { |
d2e4a39e | 9238 | struct type *raw_real_type = |
dda83cd7 | 9239 | ada_check_typedef (ada_get_base_type (type)); |
d2e4a39e | 9240 | |
5bf03f13 JB |
9241 | /* If there is no parallel XVS or XVE type, then the value is |
9242 | already unwrapped. Return it without further modification. */ | |
9243 | if ((type == raw_real_type) | |
9244 | && ada_find_parallel_type (type, "___XVE") == NULL) | |
9245 | return val; | |
14f9c5c9 | 9246 | |
d2e4a39e | 9247 | return |
dda83cd7 SM |
9248 | coerce_unspec_val_to_type |
9249 | (val, ada_to_fixed_type (raw_real_type, 0, | |
9250 | value_address (val), | |
9251 | NULL, 1)); | |
14f9c5c9 AS |
9252 | } |
9253 | } | |
d2e4a39e AS |
9254 | |
9255 | static struct value * | |
75f24e86 | 9256 | cast_from_gnat_encoded_fixed_point_type (struct type *type, struct value *arg) |
14f9c5c9 | 9257 | { |
db99d0d0 JB |
9258 | struct value *scale |
9259 | = gnat_encoded_fixed_point_scaling_factor (value_type (arg)); | |
50eff16b | 9260 | arg = value_cast (value_type (scale), arg); |
14f9c5c9 | 9261 | |
50eff16b UW |
9262 | arg = value_binop (arg, scale, BINOP_MUL); |
9263 | return value_cast (type, arg); | |
14f9c5c9 AS |
9264 | } |
9265 | ||
d2e4a39e | 9266 | static struct value * |
75f24e86 | 9267 | cast_to_gnat_encoded_fixed_point_type (struct type *type, struct value *arg) |
14f9c5c9 | 9268 | { |
50eff16b UW |
9269 | if (type == value_type (arg)) |
9270 | return arg; | |
5b4ee69b | 9271 | |
75f24e86 | 9272 | struct value *scale = gnat_encoded_fixed_point_scaling_factor (type); |
b2188a06 | 9273 | if (ada_is_gnat_encoded_fixed_point_type (value_type (arg))) |
75f24e86 | 9274 | arg = cast_from_gnat_encoded_fixed_point_type (value_type (scale), arg); |
50eff16b UW |
9275 | else |
9276 | arg = value_cast (value_type (scale), arg); | |
9277 | ||
9278 | arg = value_binop (arg, scale, BINOP_DIV); | |
9279 | return value_cast (type, arg); | |
14f9c5c9 AS |
9280 | } |
9281 | ||
d99dcf51 JB |
9282 | /* Given two array types T1 and T2, return nonzero iff both arrays |
9283 | contain the same number of elements. */ | |
9284 | ||
9285 | static int | |
9286 | ada_same_array_size_p (struct type *t1, struct type *t2) | |
9287 | { | |
9288 | LONGEST lo1, hi1, lo2, hi2; | |
9289 | ||
9290 | /* Get the array bounds in order to verify that the size of | |
9291 | the two arrays match. */ | |
9292 | if (!get_array_bounds (t1, &lo1, &hi1) | |
9293 | || !get_array_bounds (t2, &lo2, &hi2)) | |
9294 | error (_("unable to determine array bounds")); | |
9295 | ||
9296 | /* To make things easier for size comparison, normalize a bit | |
9297 | the case of empty arrays by making sure that the difference | |
9298 | between upper bound and lower bound is always -1. */ | |
9299 | if (lo1 > hi1) | |
9300 | hi1 = lo1 - 1; | |
9301 | if (lo2 > hi2) | |
9302 | hi2 = lo2 - 1; | |
9303 | ||
9304 | return (hi1 - lo1 == hi2 - lo2); | |
9305 | } | |
9306 | ||
9307 | /* Assuming that VAL is an array of integrals, and TYPE represents | |
9308 | an array with the same number of elements, but with wider integral | |
9309 | elements, return an array "casted" to TYPE. In practice, this | |
9310 | means that the returned array is built by casting each element | |
9311 | of the original array into TYPE's (wider) element type. */ | |
9312 | ||
9313 | static struct value * | |
9314 | ada_promote_array_of_integrals (struct type *type, struct value *val) | |
9315 | { | |
9316 | struct type *elt_type = TYPE_TARGET_TYPE (type); | |
9317 | LONGEST lo, hi; | |
9318 | struct value *res; | |
9319 | LONGEST i; | |
9320 | ||
9321 | /* Verify that both val and type are arrays of scalars, and | |
9322 | that the size of val's elements is smaller than the size | |
9323 | of type's element. */ | |
78134374 | 9324 | gdb_assert (type->code () == TYPE_CODE_ARRAY); |
d99dcf51 | 9325 | gdb_assert (is_integral_type (TYPE_TARGET_TYPE (type))); |
78134374 | 9326 | gdb_assert (value_type (val)->code () == TYPE_CODE_ARRAY); |
d99dcf51 JB |
9327 | gdb_assert (is_integral_type (TYPE_TARGET_TYPE (value_type (val)))); |
9328 | gdb_assert (TYPE_LENGTH (TYPE_TARGET_TYPE (type)) | |
9329 | > TYPE_LENGTH (TYPE_TARGET_TYPE (value_type (val)))); | |
9330 | ||
9331 | if (!get_array_bounds (type, &lo, &hi)) | |
9332 | error (_("unable to determine array bounds")); | |
9333 | ||
9334 | res = allocate_value (type); | |
9335 | ||
9336 | /* Promote each array element. */ | |
9337 | for (i = 0; i < hi - lo + 1; i++) | |
9338 | { | |
9339 | struct value *elt = value_cast (elt_type, value_subscript (val, lo + i)); | |
9340 | ||
9341 | memcpy (value_contents_writeable (res) + (i * TYPE_LENGTH (elt_type)), | |
9342 | value_contents_all (elt), TYPE_LENGTH (elt_type)); | |
9343 | } | |
9344 | ||
9345 | return res; | |
9346 | } | |
9347 | ||
4c4b4cd2 PH |
9348 | /* Coerce VAL as necessary for assignment to an lval of type TYPE, and |
9349 | return the converted value. */ | |
9350 | ||
d2e4a39e AS |
9351 | static struct value * |
9352 | coerce_for_assign (struct type *type, struct value *val) | |
14f9c5c9 | 9353 | { |
df407dfe | 9354 | struct type *type2 = value_type (val); |
5b4ee69b | 9355 | |
14f9c5c9 AS |
9356 | if (type == type2) |
9357 | return val; | |
9358 | ||
61ee279c PH |
9359 | type2 = ada_check_typedef (type2); |
9360 | type = ada_check_typedef (type); | |
14f9c5c9 | 9361 | |
78134374 SM |
9362 | if (type2->code () == TYPE_CODE_PTR |
9363 | && type->code () == TYPE_CODE_ARRAY) | |
14f9c5c9 AS |
9364 | { |
9365 | val = ada_value_ind (val); | |
df407dfe | 9366 | type2 = value_type (val); |
14f9c5c9 AS |
9367 | } |
9368 | ||
78134374 SM |
9369 | if (type2->code () == TYPE_CODE_ARRAY |
9370 | && type->code () == TYPE_CODE_ARRAY) | |
14f9c5c9 | 9371 | { |
d99dcf51 JB |
9372 | if (!ada_same_array_size_p (type, type2)) |
9373 | error (_("cannot assign arrays of different length")); | |
9374 | ||
9375 | if (is_integral_type (TYPE_TARGET_TYPE (type)) | |
9376 | && is_integral_type (TYPE_TARGET_TYPE (type2)) | |
9377 | && TYPE_LENGTH (TYPE_TARGET_TYPE (type2)) | |
9378 | < TYPE_LENGTH (TYPE_TARGET_TYPE (type))) | |
9379 | { | |
9380 | /* Allow implicit promotion of the array elements to | |
9381 | a wider type. */ | |
9382 | return ada_promote_array_of_integrals (type, val); | |
9383 | } | |
9384 | ||
9385 | if (TYPE_LENGTH (TYPE_TARGET_TYPE (type2)) | |
dda83cd7 SM |
9386 | != TYPE_LENGTH (TYPE_TARGET_TYPE (type))) |
9387 | error (_("Incompatible types in assignment")); | |
04624583 | 9388 | deprecated_set_value_type (val, type); |
14f9c5c9 | 9389 | } |
d2e4a39e | 9390 | return val; |
14f9c5c9 AS |
9391 | } |
9392 | ||
4c4b4cd2 PH |
9393 | static struct value * |
9394 | ada_value_binop (struct value *arg1, struct value *arg2, enum exp_opcode op) | |
9395 | { | |
9396 | struct value *val; | |
9397 | struct type *type1, *type2; | |
9398 | LONGEST v, v1, v2; | |
9399 | ||
994b9211 AC |
9400 | arg1 = coerce_ref (arg1); |
9401 | arg2 = coerce_ref (arg2); | |
18af8284 JB |
9402 | type1 = get_base_type (ada_check_typedef (value_type (arg1))); |
9403 | type2 = get_base_type (ada_check_typedef (value_type (arg2))); | |
4c4b4cd2 | 9404 | |
78134374 SM |
9405 | if (type1->code () != TYPE_CODE_INT |
9406 | || type2->code () != TYPE_CODE_INT) | |
4c4b4cd2 PH |
9407 | return value_binop (arg1, arg2, op); |
9408 | ||
76a01679 | 9409 | switch (op) |
4c4b4cd2 PH |
9410 | { |
9411 | case BINOP_MOD: | |
9412 | case BINOP_DIV: | |
9413 | case BINOP_REM: | |
9414 | break; | |
9415 | default: | |
9416 | return value_binop (arg1, arg2, op); | |
9417 | } | |
9418 | ||
9419 | v2 = value_as_long (arg2); | |
9420 | if (v2 == 0) | |
323e0a4a | 9421 | error (_("second operand of %s must not be zero."), op_string (op)); |
4c4b4cd2 | 9422 | |
c6d940a9 | 9423 | if (type1->is_unsigned () || op == BINOP_MOD) |
4c4b4cd2 PH |
9424 | return value_binop (arg1, arg2, op); |
9425 | ||
9426 | v1 = value_as_long (arg1); | |
9427 | switch (op) | |
9428 | { | |
9429 | case BINOP_DIV: | |
9430 | v = v1 / v2; | |
76a01679 | 9431 | if (!TRUNCATION_TOWARDS_ZERO && v1 * (v1 % v2) < 0) |
dda83cd7 | 9432 | v += v > 0 ? -1 : 1; |
4c4b4cd2 PH |
9433 | break; |
9434 | case BINOP_REM: | |
9435 | v = v1 % v2; | |
76a01679 | 9436 | if (v * v1 < 0) |
dda83cd7 | 9437 | v -= v2; |
4c4b4cd2 PH |
9438 | break; |
9439 | default: | |
9440 | /* Should not reach this point. */ | |
9441 | v = 0; | |
9442 | } | |
9443 | ||
9444 | val = allocate_value (type1); | |
990a07ab | 9445 | store_unsigned_integer (value_contents_raw (val), |
dda83cd7 | 9446 | TYPE_LENGTH (value_type (val)), |
34877895 | 9447 | type_byte_order (type1), v); |
4c4b4cd2 PH |
9448 | return val; |
9449 | } | |
9450 | ||
9451 | static int | |
9452 | ada_value_equal (struct value *arg1, struct value *arg2) | |
9453 | { | |
df407dfe AC |
9454 | if (ada_is_direct_array_type (value_type (arg1)) |
9455 | || ada_is_direct_array_type (value_type (arg2))) | |
4c4b4cd2 | 9456 | { |
79e8fcaa JB |
9457 | struct type *arg1_type, *arg2_type; |
9458 | ||
f58b38bf | 9459 | /* Automatically dereference any array reference before |
dda83cd7 | 9460 | we attempt to perform the comparison. */ |
f58b38bf JB |
9461 | arg1 = ada_coerce_ref (arg1); |
9462 | arg2 = ada_coerce_ref (arg2); | |
79e8fcaa | 9463 | |
4c4b4cd2 PH |
9464 | arg1 = ada_coerce_to_simple_array (arg1); |
9465 | arg2 = ada_coerce_to_simple_array (arg2); | |
79e8fcaa JB |
9466 | |
9467 | arg1_type = ada_check_typedef (value_type (arg1)); | |
9468 | arg2_type = ada_check_typedef (value_type (arg2)); | |
9469 | ||
78134374 | 9470 | if (arg1_type->code () != TYPE_CODE_ARRAY |
dda83cd7 SM |
9471 | || arg2_type->code () != TYPE_CODE_ARRAY) |
9472 | error (_("Attempt to compare array with non-array")); | |
4c4b4cd2 | 9473 | /* FIXME: The following works only for types whose |
dda83cd7 SM |
9474 | representations use all bits (no padding or undefined bits) |
9475 | and do not have user-defined equality. */ | |
79e8fcaa JB |
9476 | return (TYPE_LENGTH (arg1_type) == TYPE_LENGTH (arg2_type) |
9477 | && memcmp (value_contents (arg1), value_contents (arg2), | |
9478 | TYPE_LENGTH (arg1_type)) == 0); | |
4c4b4cd2 PH |
9479 | } |
9480 | return value_equal (arg1, arg2); | |
9481 | } | |
9482 | ||
52ce6436 PH |
9483 | /* Total number of component associations in the aggregate starting at |
9484 | index PC in EXP. Assumes that index PC is the start of an | |
0963b4bd | 9485 | OP_AGGREGATE. */ |
52ce6436 PH |
9486 | |
9487 | static int | |
9488 | num_component_specs (struct expression *exp, int pc) | |
9489 | { | |
9490 | int n, m, i; | |
5b4ee69b | 9491 | |
52ce6436 PH |
9492 | m = exp->elts[pc + 1].longconst; |
9493 | pc += 3; | |
9494 | n = 0; | |
9495 | for (i = 0; i < m; i += 1) | |
9496 | { | |
9497 | switch (exp->elts[pc].opcode) | |
9498 | { | |
9499 | default: | |
9500 | n += 1; | |
9501 | break; | |
9502 | case OP_CHOICES: | |
9503 | n += exp->elts[pc + 1].longconst; | |
9504 | break; | |
9505 | } | |
9506 | ada_evaluate_subexp (NULL, exp, &pc, EVAL_SKIP); | |
9507 | } | |
9508 | return n; | |
9509 | } | |
9510 | ||
9511 | /* Assign the result of evaluating EXP starting at *POS to the INDEXth | |
9512 | component of LHS (a simple array or a record), updating *POS past | |
9513 | the expression, assuming that LHS is contained in CONTAINER. Does | |
9514 | not modify the inferior's memory, nor does it modify LHS (unless | |
9515 | LHS == CONTAINER). */ | |
9516 | ||
9517 | static void | |
9518 | assign_component (struct value *container, struct value *lhs, LONGEST index, | |
9519 | struct expression *exp, int *pos) | |
9520 | { | |
9521 | struct value *mark = value_mark (); | |
9522 | struct value *elt; | |
0e2da9f0 | 9523 | struct type *lhs_type = check_typedef (value_type (lhs)); |
5b4ee69b | 9524 | |
78134374 | 9525 | if (lhs_type->code () == TYPE_CODE_ARRAY) |
52ce6436 | 9526 | { |
22601c15 UW |
9527 | struct type *index_type = builtin_type (exp->gdbarch)->builtin_int; |
9528 | struct value *index_val = value_from_longest (index_type, index); | |
5b4ee69b | 9529 | |
52ce6436 PH |
9530 | elt = unwrap_value (ada_value_subscript (lhs, 1, &index_val)); |
9531 | } | |
9532 | else | |
9533 | { | |
9534 | elt = ada_index_struct_field (index, lhs, 0, value_type (lhs)); | |
c48db5ca | 9535 | elt = ada_to_fixed_value (elt); |
52ce6436 PH |
9536 | } |
9537 | ||
9538 | if (exp->elts[*pos].opcode == OP_AGGREGATE) | |
9539 | assign_aggregate (container, elt, exp, pos, EVAL_NORMAL); | |
9540 | else | |
9541 | value_assign_to_component (container, elt, | |
9542 | ada_evaluate_subexp (NULL, exp, pos, | |
9543 | EVAL_NORMAL)); | |
9544 | ||
9545 | value_free_to_mark (mark); | |
9546 | } | |
9547 | ||
9548 | /* Assuming that LHS represents an lvalue having a record or array | |
9549 | type, and EXP->ELTS[*POS] is an OP_AGGREGATE, evaluate an assignment | |
9550 | of that aggregate's value to LHS, advancing *POS past the | |
9551 | aggregate. NOSIDE is as for evaluate_subexp. CONTAINER is an | |
9552 | lvalue containing LHS (possibly LHS itself). Does not modify | |
9553 | the inferior's memory, nor does it modify the contents of | |
0963b4bd | 9554 | LHS (unless == CONTAINER). Returns the modified CONTAINER. */ |
52ce6436 PH |
9555 | |
9556 | static struct value * | |
9557 | assign_aggregate (struct value *container, | |
9558 | struct value *lhs, struct expression *exp, | |
9559 | int *pos, enum noside noside) | |
9560 | { | |
9561 | struct type *lhs_type; | |
9562 | int n = exp->elts[*pos+1].longconst; | |
9563 | LONGEST low_index, high_index; | |
9564 | int num_specs; | |
9565 | LONGEST *indices; | |
9566 | int max_indices, num_indices; | |
52ce6436 | 9567 | int i; |
52ce6436 PH |
9568 | |
9569 | *pos += 3; | |
9570 | if (noside != EVAL_NORMAL) | |
9571 | { | |
52ce6436 PH |
9572 | for (i = 0; i < n; i += 1) |
9573 | ada_evaluate_subexp (NULL, exp, pos, noside); | |
9574 | return container; | |
9575 | } | |
9576 | ||
9577 | container = ada_coerce_ref (container); | |
9578 | if (ada_is_direct_array_type (value_type (container))) | |
9579 | container = ada_coerce_to_simple_array (container); | |
9580 | lhs = ada_coerce_ref (lhs); | |
9581 | if (!deprecated_value_modifiable (lhs)) | |
9582 | error (_("Left operand of assignment is not a modifiable lvalue.")); | |
9583 | ||
0e2da9f0 | 9584 | lhs_type = check_typedef (value_type (lhs)); |
52ce6436 PH |
9585 | if (ada_is_direct_array_type (lhs_type)) |
9586 | { | |
9587 | lhs = ada_coerce_to_simple_array (lhs); | |
0e2da9f0 | 9588 | lhs_type = check_typedef (value_type (lhs)); |
cf88be68 SM |
9589 | low_index = lhs_type->bounds ()->low.const_val (); |
9590 | high_index = lhs_type->bounds ()->high.const_val (); | |
52ce6436 | 9591 | } |
78134374 | 9592 | else if (lhs_type->code () == TYPE_CODE_STRUCT) |
52ce6436 PH |
9593 | { |
9594 | low_index = 0; | |
9595 | high_index = num_visible_fields (lhs_type) - 1; | |
52ce6436 PH |
9596 | } |
9597 | else | |
9598 | error (_("Left-hand side must be array or record.")); | |
9599 | ||
9600 | num_specs = num_component_specs (exp, *pos - 3); | |
9601 | max_indices = 4 * num_specs + 4; | |
8d749320 | 9602 | indices = XALLOCAVEC (LONGEST, max_indices); |
52ce6436 PH |
9603 | indices[0] = indices[1] = low_index - 1; |
9604 | indices[2] = indices[3] = high_index + 1; | |
9605 | num_indices = 4; | |
9606 | ||
9607 | for (i = 0; i < n; i += 1) | |
9608 | { | |
9609 | switch (exp->elts[*pos].opcode) | |
9610 | { | |
1fbf5ada JB |
9611 | case OP_CHOICES: |
9612 | aggregate_assign_from_choices (container, lhs, exp, pos, indices, | |
9613 | &num_indices, max_indices, | |
9614 | low_index, high_index); | |
9615 | break; | |
9616 | case OP_POSITIONAL: | |
9617 | aggregate_assign_positional (container, lhs, exp, pos, indices, | |
52ce6436 PH |
9618 | &num_indices, max_indices, |
9619 | low_index, high_index); | |
1fbf5ada JB |
9620 | break; |
9621 | case OP_OTHERS: | |
9622 | if (i != n-1) | |
9623 | error (_("Misplaced 'others' clause")); | |
9624 | aggregate_assign_others (container, lhs, exp, pos, indices, | |
9625 | num_indices, low_index, high_index); | |
9626 | break; | |
9627 | default: | |
9628 | error (_("Internal error: bad aggregate clause")); | |
52ce6436 PH |
9629 | } |
9630 | } | |
9631 | ||
9632 | return container; | |
9633 | } | |
9634 | ||
9635 | /* Assign into the component of LHS indexed by the OP_POSITIONAL | |
9636 | construct at *POS, updating *POS past the construct, given that | |
9637 | the positions are relative to lower bound LOW, where HIGH is the | |
9638 | upper bound. Record the position in INDICES[0 .. MAX_INDICES-1] | |
9639 | updating *NUM_INDICES as needed. CONTAINER is as for | |
0963b4bd | 9640 | assign_aggregate. */ |
52ce6436 PH |
9641 | static void |
9642 | aggregate_assign_positional (struct value *container, | |
9643 | struct value *lhs, struct expression *exp, | |
9644 | int *pos, LONGEST *indices, int *num_indices, | |
9645 | int max_indices, LONGEST low, LONGEST high) | |
9646 | { | |
9647 | LONGEST ind = longest_to_int (exp->elts[*pos + 1].longconst) + low; | |
9648 | ||
9649 | if (ind - 1 == high) | |
e1d5a0d2 | 9650 | warning (_("Extra components in aggregate ignored.")); |
52ce6436 PH |
9651 | if (ind <= high) |
9652 | { | |
9653 | add_component_interval (ind, ind, indices, num_indices, max_indices); | |
9654 | *pos += 3; | |
9655 | assign_component (container, lhs, ind, exp, pos); | |
9656 | } | |
9657 | else | |
9658 | ada_evaluate_subexp (NULL, exp, pos, EVAL_SKIP); | |
9659 | } | |
9660 | ||
9661 | /* Assign into the components of LHS indexed by the OP_CHOICES | |
9662 | construct at *POS, updating *POS past the construct, given that | |
9663 | the allowable indices are LOW..HIGH. Record the indices assigned | |
9664 | to in INDICES[0 .. MAX_INDICES-1], updating *NUM_INDICES as | |
0963b4bd | 9665 | needed. CONTAINER is as for assign_aggregate. */ |
52ce6436 PH |
9666 | static void |
9667 | aggregate_assign_from_choices (struct value *container, | |
9668 | struct value *lhs, struct expression *exp, | |
9669 | int *pos, LONGEST *indices, int *num_indices, | |
9670 | int max_indices, LONGEST low, LONGEST high) | |
9671 | { | |
9672 | int j; | |
9673 | int n_choices = longest_to_int (exp->elts[*pos+1].longconst); | |
9674 | int choice_pos, expr_pc; | |
9675 | int is_array = ada_is_direct_array_type (value_type (lhs)); | |
9676 | ||
9677 | choice_pos = *pos += 3; | |
9678 | ||
9679 | for (j = 0; j < n_choices; j += 1) | |
9680 | ada_evaluate_subexp (NULL, exp, pos, EVAL_SKIP); | |
9681 | expr_pc = *pos; | |
9682 | ada_evaluate_subexp (NULL, exp, pos, EVAL_SKIP); | |
9683 | ||
9684 | for (j = 0; j < n_choices; j += 1) | |
9685 | { | |
9686 | LONGEST lower, upper; | |
9687 | enum exp_opcode op = exp->elts[choice_pos].opcode; | |
5b4ee69b | 9688 | |
52ce6436 PH |
9689 | if (op == OP_DISCRETE_RANGE) |
9690 | { | |
9691 | choice_pos += 1; | |
9692 | lower = value_as_long (ada_evaluate_subexp (NULL, exp, pos, | |
9693 | EVAL_NORMAL)); | |
9694 | upper = value_as_long (ada_evaluate_subexp (NULL, exp, pos, | |
9695 | EVAL_NORMAL)); | |
9696 | } | |
9697 | else if (is_array) | |
9698 | { | |
9699 | lower = value_as_long (ada_evaluate_subexp (NULL, exp, &choice_pos, | |
9700 | EVAL_NORMAL)); | |
9701 | upper = lower; | |
9702 | } | |
9703 | else | |
9704 | { | |
9705 | int ind; | |
0d5cff50 | 9706 | const char *name; |
5b4ee69b | 9707 | |
52ce6436 PH |
9708 | switch (op) |
9709 | { | |
9710 | case OP_NAME: | |
9711 | name = &exp->elts[choice_pos + 2].string; | |
9712 | break; | |
9713 | case OP_VAR_VALUE: | |
987012b8 | 9714 | name = exp->elts[choice_pos + 2].symbol->natural_name (); |
52ce6436 PH |
9715 | break; |
9716 | default: | |
9717 | error (_("Invalid record component association.")); | |
9718 | } | |
9719 | ada_evaluate_subexp (NULL, exp, &choice_pos, EVAL_SKIP); | |
9720 | ind = 0; | |
9721 | if (! find_struct_field (name, value_type (lhs), 0, | |
9722 | NULL, NULL, NULL, NULL, &ind)) | |
9723 | error (_("Unknown component name: %s."), name); | |
9724 | lower = upper = ind; | |
9725 | } | |
9726 | ||
9727 | if (lower <= upper && (lower < low || upper > high)) | |
9728 | error (_("Index in component association out of bounds.")); | |
9729 | ||
9730 | add_component_interval (lower, upper, indices, num_indices, | |
9731 | max_indices); | |
9732 | while (lower <= upper) | |
9733 | { | |
9734 | int pos1; | |
5b4ee69b | 9735 | |
52ce6436 PH |
9736 | pos1 = expr_pc; |
9737 | assign_component (container, lhs, lower, exp, &pos1); | |
9738 | lower += 1; | |
9739 | } | |
9740 | } | |
9741 | } | |
9742 | ||
9743 | /* Assign the value of the expression in the OP_OTHERS construct in | |
9744 | EXP at *POS into the components of LHS indexed from LOW .. HIGH that | |
9745 | have not been previously assigned. The index intervals already assigned | |
9746 | are in INDICES[0 .. NUM_INDICES-1]. Updates *POS to after the | |
0963b4bd | 9747 | OP_OTHERS clause. CONTAINER is as for assign_aggregate. */ |
52ce6436 PH |
9748 | static void |
9749 | aggregate_assign_others (struct value *container, | |
9750 | struct value *lhs, struct expression *exp, | |
9751 | int *pos, LONGEST *indices, int num_indices, | |
9752 | LONGEST low, LONGEST high) | |
9753 | { | |
9754 | int i; | |
5ce64950 | 9755 | int expr_pc = *pos + 1; |
52ce6436 PH |
9756 | |
9757 | for (i = 0; i < num_indices - 2; i += 2) | |
9758 | { | |
9759 | LONGEST ind; | |
5b4ee69b | 9760 | |
52ce6436 PH |
9761 | for (ind = indices[i + 1] + 1; ind < indices[i + 2]; ind += 1) |
9762 | { | |
5ce64950 | 9763 | int localpos; |
5b4ee69b | 9764 | |
5ce64950 MS |
9765 | localpos = expr_pc; |
9766 | assign_component (container, lhs, ind, exp, &localpos); | |
52ce6436 PH |
9767 | } |
9768 | } | |
9769 | ada_evaluate_subexp (NULL, exp, pos, EVAL_SKIP); | |
9770 | } | |
9771 | ||
9772 | /* Add the interval [LOW .. HIGH] to the sorted set of intervals | |
9773 | [ INDICES[0] .. INDICES[1] ],..., [ INDICES[*SIZE-2] .. INDICES[*SIZE-1] ], | |
9774 | modifying *SIZE as needed. It is an error if *SIZE exceeds | |
9775 | MAX_SIZE. The resulting intervals do not overlap. */ | |
9776 | static void | |
9777 | add_component_interval (LONGEST low, LONGEST high, | |
9778 | LONGEST* indices, int *size, int max_size) | |
9779 | { | |
9780 | int i, j; | |
5b4ee69b | 9781 | |
52ce6436 PH |
9782 | for (i = 0; i < *size; i += 2) { |
9783 | if (high >= indices[i] && low <= indices[i + 1]) | |
9784 | { | |
9785 | int kh; | |
5b4ee69b | 9786 | |
52ce6436 PH |
9787 | for (kh = i + 2; kh < *size; kh += 2) |
9788 | if (high < indices[kh]) | |
9789 | break; | |
9790 | if (low < indices[i]) | |
9791 | indices[i] = low; | |
9792 | indices[i + 1] = indices[kh - 1]; | |
9793 | if (high > indices[i + 1]) | |
9794 | indices[i + 1] = high; | |
9795 | memcpy (indices + i + 2, indices + kh, *size - kh); | |
9796 | *size -= kh - i - 2; | |
9797 | return; | |
9798 | } | |
9799 | else if (high < indices[i]) | |
9800 | break; | |
9801 | } | |
9802 | ||
9803 | if (*size == max_size) | |
9804 | error (_("Internal error: miscounted aggregate components.")); | |
9805 | *size += 2; | |
9806 | for (j = *size-1; j >= i+2; j -= 1) | |
9807 | indices[j] = indices[j - 2]; | |
9808 | indices[i] = low; | |
9809 | indices[i + 1] = high; | |
9810 | } | |
9811 | ||
6e48bd2c JB |
9812 | /* Perform and Ada cast of ARG2 to type TYPE if the type of ARG2 |
9813 | is different. */ | |
9814 | ||
9815 | static struct value * | |
b7e22850 | 9816 | ada_value_cast (struct type *type, struct value *arg2) |
6e48bd2c JB |
9817 | { |
9818 | if (type == ada_check_typedef (value_type (arg2))) | |
9819 | return arg2; | |
9820 | ||
b2188a06 | 9821 | if (ada_is_gnat_encoded_fixed_point_type (type)) |
75f24e86 | 9822 | return cast_to_gnat_encoded_fixed_point_type (type, arg2); |
6e48bd2c | 9823 | |
b2188a06 | 9824 | if (ada_is_gnat_encoded_fixed_point_type (value_type (arg2))) |
75f24e86 | 9825 | return cast_from_gnat_encoded_fixed_point_type (type, arg2); |
6e48bd2c JB |
9826 | |
9827 | return value_cast (type, arg2); | |
9828 | } | |
9829 | ||
284614f0 JB |
9830 | /* Evaluating Ada expressions, and printing their result. |
9831 | ------------------------------------------------------ | |
9832 | ||
21649b50 JB |
9833 | 1. Introduction: |
9834 | ---------------- | |
9835 | ||
284614f0 JB |
9836 | We usually evaluate an Ada expression in order to print its value. |
9837 | We also evaluate an expression in order to print its type, which | |
9838 | happens during the EVAL_AVOID_SIDE_EFFECTS phase of the evaluation, | |
9839 | but we'll focus mostly on the EVAL_NORMAL phase. In practice, the | |
9840 | EVAL_AVOID_SIDE_EFFECTS phase allows us to simplify certain aspects of | |
9841 | the evaluation compared to the EVAL_NORMAL, but is otherwise very | |
9842 | similar. | |
9843 | ||
9844 | Evaluating expressions is a little more complicated for Ada entities | |
9845 | than it is for entities in languages such as C. The main reason for | |
9846 | this is that Ada provides types whose definition might be dynamic. | |
9847 | One example of such types is variant records. Or another example | |
9848 | would be an array whose bounds can only be known at run time. | |
9849 | ||
9850 | The following description is a general guide as to what should be | |
9851 | done (and what should NOT be done) in order to evaluate an expression | |
9852 | involving such types, and when. This does not cover how the semantic | |
9853 | information is encoded by GNAT as this is covered separatly. For the | |
9854 | document used as the reference for the GNAT encoding, see exp_dbug.ads | |
9855 | in the GNAT sources. | |
9856 | ||
9857 | Ideally, we should embed each part of this description next to its | |
9858 | associated code. Unfortunately, the amount of code is so vast right | |
9859 | now that it's hard to see whether the code handling a particular | |
9860 | situation might be duplicated or not. One day, when the code is | |
9861 | cleaned up, this guide might become redundant with the comments | |
9862 | inserted in the code, and we might want to remove it. | |
9863 | ||
21649b50 JB |
9864 | 2. ``Fixing'' an Entity, the Simple Case: |
9865 | ----------------------------------------- | |
9866 | ||
284614f0 JB |
9867 | When evaluating Ada expressions, the tricky issue is that they may |
9868 | reference entities whose type contents and size are not statically | |
9869 | known. Consider for instance a variant record: | |
9870 | ||
9871 | type Rec (Empty : Boolean := True) is record | |
dda83cd7 SM |
9872 | case Empty is |
9873 | when True => null; | |
9874 | when False => Value : Integer; | |
9875 | end case; | |
284614f0 JB |
9876 | end record; |
9877 | Yes : Rec := (Empty => False, Value => 1); | |
9878 | No : Rec := (empty => True); | |
9879 | ||
9880 | The size and contents of that record depends on the value of the | |
9881 | descriminant (Rec.Empty). At this point, neither the debugging | |
9882 | information nor the associated type structure in GDB are able to | |
9883 | express such dynamic types. So what the debugger does is to create | |
9884 | "fixed" versions of the type that applies to the specific object. | |
30baf67b | 9885 | We also informally refer to this operation as "fixing" an object, |
284614f0 JB |
9886 | which means creating its associated fixed type. |
9887 | ||
9888 | Example: when printing the value of variable "Yes" above, its fixed | |
9889 | type would look like this: | |
9890 | ||
9891 | type Rec is record | |
dda83cd7 SM |
9892 | Empty : Boolean; |
9893 | Value : Integer; | |
284614f0 JB |
9894 | end record; |
9895 | ||
9896 | On the other hand, if we printed the value of "No", its fixed type | |
9897 | would become: | |
9898 | ||
9899 | type Rec is record | |
dda83cd7 | 9900 | Empty : Boolean; |
284614f0 JB |
9901 | end record; |
9902 | ||
9903 | Things become a little more complicated when trying to fix an entity | |
9904 | with a dynamic type that directly contains another dynamic type, | |
9905 | such as an array of variant records, for instance. There are | |
9906 | two possible cases: Arrays, and records. | |
9907 | ||
21649b50 JB |
9908 | 3. ``Fixing'' Arrays: |
9909 | --------------------- | |
9910 | ||
9911 | The type structure in GDB describes an array in terms of its bounds, | |
9912 | and the type of its elements. By design, all elements in the array | |
9913 | have the same type and we cannot represent an array of variant elements | |
9914 | using the current type structure in GDB. When fixing an array, | |
9915 | we cannot fix the array element, as we would potentially need one | |
9916 | fixed type per element of the array. As a result, the best we can do | |
9917 | when fixing an array is to produce an array whose bounds and size | |
9918 | are correct (allowing us to read it from memory), but without having | |
9919 | touched its element type. Fixing each element will be done later, | |
9920 | when (if) necessary. | |
9921 | ||
9922 | Arrays are a little simpler to handle than records, because the same | |
9923 | amount of memory is allocated for each element of the array, even if | |
1b536f04 | 9924 | the amount of space actually used by each element differs from element |
21649b50 | 9925 | to element. Consider for instance the following array of type Rec: |
284614f0 JB |
9926 | |
9927 | type Rec_Array is array (1 .. 2) of Rec; | |
9928 | ||
1b536f04 JB |
9929 | The actual amount of memory occupied by each element might be different |
9930 | from element to element, depending on the value of their discriminant. | |
21649b50 | 9931 | But the amount of space reserved for each element in the array remains |
1b536f04 | 9932 | fixed regardless. So we simply need to compute that size using |
21649b50 JB |
9933 | the debugging information available, from which we can then determine |
9934 | the array size (we multiply the number of elements of the array by | |
9935 | the size of each element). | |
9936 | ||
9937 | The simplest case is when we have an array of a constrained element | |
9938 | type. For instance, consider the following type declarations: | |
9939 | ||
dda83cd7 SM |
9940 | type Bounded_String (Max_Size : Integer) is |
9941 | Length : Integer; | |
9942 | Buffer : String (1 .. Max_Size); | |
9943 | end record; | |
9944 | type Bounded_String_Array is array (1 ..2) of Bounded_String (80); | |
21649b50 JB |
9945 | |
9946 | In this case, the compiler describes the array as an array of | |
9947 | variable-size elements (identified by its XVS suffix) for which | |
9948 | the size can be read in the parallel XVZ variable. | |
9949 | ||
9950 | In the case of an array of an unconstrained element type, the compiler | |
9951 | wraps the array element inside a private PAD type. This type should not | |
9952 | be shown to the user, and must be "unwrap"'ed before printing. Note | |
284614f0 JB |
9953 | that we also use the adjective "aligner" in our code to designate |
9954 | these wrapper types. | |
9955 | ||
1b536f04 | 9956 | In some cases, the size allocated for each element is statically |
21649b50 JB |
9957 | known. In that case, the PAD type already has the correct size, |
9958 | and the array element should remain unfixed. | |
9959 | ||
9960 | But there are cases when this size is not statically known. | |
9961 | For instance, assuming that "Five" is an integer variable: | |
284614f0 | 9962 | |
dda83cd7 SM |
9963 | type Dynamic is array (1 .. Five) of Integer; |
9964 | type Wrapper (Has_Length : Boolean := False) is record | |
9965 | Data : Dynamic; | |
9966 | case Has_Length is | |
9967 | when True => Length : Integer; | |
9968 | when False => null; | |
9969 | end case; | |
9970 | end record; | |
9971 | type Wrapper_Array is array (1 .. 2) of Wrapper; | |
284614f0 | 9972 | |
dda83cd7 SM |
9973 | Hello : Wrapper_Array := (others => (Has_Length => True, |
9974 | Data => (others => 17), | |
9975 | Length => 1)); | |
284614f0 JB |
9976 | |
9977 | ||
9978 | The debugging info would describe variable Hello as being an | |
9979 | array of a PAD type. The size of that PAD type is not statically | |
9980 | known, but can be determined using a parallel XVZ variable. | |
9981 | In that case, a copy of the PAD type with the correct size should | |
9982 | be used for the fixed array. | |
9983 | ||
21649b50 JB |
9984 | 3. ``Fixing'' record type objects: |
9985 | ---------------------------------- | |
9986 | ||
9987 | Things are slightly different from arrays in the case of dynamic | |
284614f0 JB |
9988 | record types. In this case, in order to compute the associated |
9989 | fixed type, we need to determine the size and offset of each of | |
9990 | its components. This, in turn, requires us to compute the fixed | |
9991 | type of each of these components. | |
9992 | ||
9993 | Consider for instance the example: | |
9994 | ||
dda83cd7 SM |
9995 | type Bounded_String (Max_Size : Natural) is record |
9996 | Str : String (1 .. Max_Size); | |
9997 | Length : Natural; | |
9998 | end record; | |
9999 | My_String : Bounded_String (Max_Size => 10); | |
284614f0 JB |
10000 | |
10001 | In that case, the position of field "Length" depends on the size | |
10002 | of field Str, which itself depends on the value of the Max_Size | |
21649b50 | 10003 | discriminant. In order to fix the type of variable My_String, |
284614f0 JB |
10004 | we need to fix the type of field Str. Therefore, fixing a variant |
10005 | record requires us to fix each of its components. | |
10006 | ||
10007 | However, if a component does not have a dynamic size, the component | |
10008 | should not be fixed. In particular, fields that use a PAD type | |
10009 | should not fixed. Here is an example where this might happen | |
10010 | (assuming type Rec above): | |
10011 | ||
10012 | type Container (Big : Boolean) is record | |
dda83cd7 SM |
10013 | First : Rec; |
10014 | After : Integer; | |
10015 | case Big is | |
10016 | when True => Another : Integer; | |
10017 | when False => null; | |
10018 | end case; | |
284614f0 JB |
10019 | end record; |
10020 | My_Container : Container := (Big => False, | |
dda83cd7 SM |
10021 | First => (Empty => True), |
10022 | After => 42); | |
284614f0 JB |
10023 | |
10024 | In that example, the compiler creates a PAD type for component First, | |
10025 | whose size is constant, and then positions the component After just | |
10026 | right after it. The offset of component After is therefore constant | |
10027 | in this case. | |
10028 | ||
10029 | The debugger computes the position of each field based on an algorithm | |
10030 | that uses, among other things, the actual position and size of the field | |
21649b50 JB |
10031 | preceding it. Let's now imagine that the user is trying to print |
10032 | the value of My_Container. If the type fixing was recursive, we would | |
284614f0 JB |
10033 | end up computing the offset of field After based on the size of the |
10034 | fixed version of field First. And since in our example First has | |
10035 | only one actual field, the size of the fixed type is actually smaller | |
10036 | than the amount of space allocated to that field, and thus we would | |
10037 | compute the wrong offset of field After. | |
10038 | ||
21649b50 JB |
10039 | To make things more complicated, we need to watch out for dynamic |
10040 | components of variant records (identified by the ___XVL suffix in | |
10041 | the component name). Even if the target type is a PAD type, the size | |
10042 | of that type might not be statically known. So the PAD type needs | |
10043 | to be unwrapped and the resulting type needs to be fixed. Otherwise, | |
10044 | we might end up with the wrong size for our component. This can be | |
10045 | observed with the following type declarations: | |
284614f0 | 10046 | |
dda83cd7 SM |
10047 | type Octal is new Integer range 0 .. 7; |
10048 | type Octal_Array is array (Positive range <>) of Octal; | |
10049 | pragma Pack (Octal_Array); | |
284614f0 | 10050 | |
dda83cd7 SM |
10051 | type Octal_Buffer (Size : Positive) is record |
10052 | Buffer : Octal_Array (1 .. Size); | |
10053 | Length : Integer; | |
10054 | end record; | |
284614f0 JB |
10055 | |
10056 | In that case, Buffer is a PAD type whose size is unset and needs | |
10057 | to be computed by fixing the unwrapped type. | |
10058 | ||
21649b50 JB |
10059 | 4. When to ``Fix'' un-``Fixed'' sub-elements of an entity: |
10060 | ---------------------------------------------------------- | |
10061 | ||
10062 | Lastly, when should the sub-elements of an entity that remained unfixed | |
284614f0 JB |
10063 | thus far, be actually fixed? |
10064 | ||
10065 | The answer is: Only when referencing that element. For instance | |
10066 | when selecting one component of a record, this specific component | |
10067 | should be fixed at that point in time. Or when printing the value | |
10068 | of a record, each component should be fixed before its value gets | |
10069 | printed. Similarly for arrays, the element of the array should be | |
10070 | fixed when printing each element of the array, or when extracting | |
10071 | one element out of that array. On the other hand, fixing should | |
10072 | not be performed on the elements when taking a slice of an array! | |
10073 | ||
31432a67 | 10074 | Note that one of the side effects of miscomputing the offset and |
284614f0 JB |
10075 | size of each field is that we end up also miscomputing the size |
10076 | of the containing type. This can have adverse results when computing | |
10077 | the value of an entity. GDB fetches the value of an entity based | |
10078 | on the size of its type, and thus a wrong size causes GDB to fetch | |
10079 | the wrong amount of memory. In the case where the computed size is | |
10080 | too small, GDB fetches too little data to print the value of our | |
31432a67 | 10081 | entity. Results in this case are unpredictable, as we usually read |
284614f0 JB |
10082 | past the buffer containing the data =:-o. */ |
10083 | ||
ced9779b JB |
10084 | /* Evaluate a subexpression of EXP, at index *POS, and return a value |
10085 | for that subexpression cast to TO_TYPE. Advance *POS over the | |
10086 | subexpression. */ | |
10087 | ||
10088 | static value * | |
10089 | ada_evaluate_subexp_for_cast (expression *exp, int *pos, | |
10090 | enum noside noside, struct type *to_type) | |
10091 | { | |
10092 | int pc = *pos; | |
10093 | ||
10094 | if (exp->elts[pc].opcode == OP_VAR_MSYM_VALUE | |
10095 | || exp->elts[pc].opcode == OP_VAR_VALUE) | |
10096 | { | |
10097 | (*pos) += 4; | |
10098 | ||
10099 | value *val; | |
10100 | if (exp->elts[pc].opcode == OP_VAR_MSYM_VALUE) | |
dda83cd7 SM |
10101 | { |
10102 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
10103 | return value_zero (to_type, not_lval); | |
10104 | ||
10105 | val = evaluate_var_msym_value (noside, | |
10106 | exp->elts[pc + 1].objfile, | |
10107 | exp->elts[pc + 2].msymbol); | |
10108 | } | |
ced9779b | 10109 | else |
dda83cd7 SM |
10110 | val = evaluate_var_value (noside, |
10111 | exp->elts[pc + 1].block, | |
10112 | exp->elts[pc + 2].symbol); | |
ced9779b JB |
10113 | |
10114 | if (noside == EVAL_SKIP) | |
dda83cd7 | 10115 | return eval_skip_value (exp); |
ced9779b JB |
10116 | |
10117 | val = ada_value_cast (to_type, val); | |
10118 | ||
10119 | /* Follow the Ada language semantics that do not allow taking | |
10120 | an address of the result of a cast (view conversion in Ada). */ | |
10121 | if (VALUE_LVAL (val) == lval_memory) | |
dda83cd7 SM |
10122 | { |
10123 | if (value_lazy (val)) | |
10124 | value_fetch_lazy (val); | |
10125 | VALUE_LVAL (val) = not_lval; | |
10126 | } | |
ced9779b JB |
10127 | return val; |
10128 | } | |
10129 | ||
10130 | value *val = evaluate_subexp (to_type, exp, pos, noside); | |
10131 | if (noside == EVAL_SKIP) | |
10132 | return eval_skip_value (exp); | |
10133 | return ada_value_cast (to_type, val); | |
10134 | } | |
10135 | ||
284614f0 JB |
10136 | /* Implement the evaluate_exp routine in the exp_descriptor structure |
10137 | for the Ada language. */ | |
10138 | ||
52ce6436 | 10139 | static struct value * |
ebf56fd3 | 10140 | ada_evaluate_subexp (struct type *expect_type, struct expression *exp, |
dda83cd7 | 10141 | int *pos, enum noside noside) |
14f9c5c9 AS |
10142 | { |
10143 | enum exp_opcode op; | |
b5385fc0 | 10144 | int tem; |
14f9c5c9 | 10145 | int pc; |
5ec18f2b | 10146 | int preeval_pos; |
14f9c5c9 AS |
10147 | struct value *arg1 = NULL, *arg2 = NULL, *arg3; |
10148 | struct type *type; | |
52ce6436 | 10149 | int nargs, oplen; |
d2e4a39e | 10150 | struct value **argvec; |
14f9c5c9 | 10151 | |
d2e4a39e AS |
10152 | pc = *pos; |
10153 | *pos += 1; | |
14f9c5c9 AS |
10154 | op = exp->elts[pc].opcode; |
10155 | ||
d2e4a39e | 10156 | switch (op) |
14f9c5c9 AS |
10157 | { |
10158 | default: | |
10159 | *pos -= 1; | |
6e48bd2c | 10160 | arg1 = evaluate_subexp_standard (expect_type, exp, pos, noside); |
ca1f964d JG |
10161 | |
10162 | if (noside == EVAL_NORMAL) | |
10163 | arg1 = unwrap_value (arg1); | |
6e48bd2c | 10164 | |
edd079d9 | 10165 | /* If evaluating an OP_FLOAT and an EXPECT_TYPE was provided, |
dda83cd7 SM |
10166 | then we need to perform the conversion manually, because |
10167 | evaluate_subexp_standard doesn't do it. This conversion is | |
10168 | necessary in Ada because the different kinds of float/fixed | |
10169 | types in Ada have different representations. | |
6e48bd2c | 10170 | |
dda83cd7 SM |
10171 | Similarly, we need to perform the conversion from OP_LONG |
10172 | ourselves. */ | |
edd079d9 | 10173 | if ((op == OP_FLOAT || op == OP_LONG) && expect_type != NULL) |
dda83cd7 | 10174 | arg1 = ada_value_cast (expect_type, arg1); |
6e48bd2c JB |
10175 | |
10176 | return arg1; | |
4c4b4cd2 PH |
10177 | |
10178 | case OP_STRING: | |
10179 | { | |
dda83cd7 SM |
10180 | struct value *result; |
10181 | ||
10182 | *pos -= 1; | |
10183 | result = evaluate_subexp_standard (expect_type, exp, pos, noside); | |
10184 | /* The result type will have code OP_STRING, bashed there from | |
10185 | OP_ARRAY. Bash it back. */ | |
10186 | if (value_type (result)->code () == TYPE_CODE_STRING) | |
10187 | value_type (result)->set_code (TYPE_CODE_ARRAY); | |
10188 | return result; | |
4c4b4cd2 | 10189 | } |
14f9c5c9 AS |
10190 | |
10191 | case UNOP_CAST: | |
10192 | (*pos) += 2; | |
10193 | type = exp->elts[pc + 1].type; | |
ced9779b | 10194 | return ada_evaluate_subexp_for_cast (exp, pos, noside, type); |
14f9c5c9 | 10195 | |
4c4b4cd2 PH |
10196 | case UNOP_QUAL: |
10197 | (*pos) += 2; | |
10198 | type = exp->elts[pc + 1].type; | |
10199 | return ada_evaluate_subexp (type, exp, pos, noside); | |
10200 | ||
14f9c5c9 | 10201 | case BINOP_ASSIGN: |
fe1fe7ea | 10202 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
52ce6436 PH |
10203 | if (exp->elts[*pos].opcode == OP_AGGREGATE) |
10204 | { | |
10205 | arg1 = assign_aggregate (arg1, arg1, exp, pos, noside); | |
10206 | if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS) | |
10207 | return arg1; | |
10208 | return ada_value_assign (arg1, arg1); | |
10209 | } | |
003f3813 | 10210 | /* Force the evaluation of the rhs ARG2 to the type of the lhs ARG1, |
dda83cd7 SM |
10211 | except if the lhs of our assignment is a convenience variable. |
10212 | In the case of assigning to a convenience variable, the lhs | |
10213 | should be exactly the result of the evaluation of the rhs. */ | |
003f3813 JB |
10214 | type = value_type (arg1); |
10215 | if (VALUE_LVAL (arg1) == lval_internalvar) | |
dda83cd7 | 10216 | type = NULL; |
003f3813 | 10217 | arg2 = evaluate_subexp (type, exp, pos, noside); |
14f9c5c9 | 10218 | if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS) |
dda83cd7 | 10219 | return arg1; |
f411722c TT |
10220 | if (VALUE_LVAL (arg1) == lval_internalvar) |
10221 | { | |
10222 | /* Nothing. */ | |
10223 | } | |
b2188a06 | 10224 | else if (ada_is_gnat_encoded_fixed_point_type (value_type (arg1))) |
dda83cd7 | 10225 | arg2 = cast_to_gnat_encoded_fixed_point_type (value_type (arg1), arg2); |
b2188a06 | 10226 | else if (ada_is_gnat_encoded_fixed_point_type (value_type (arg2))) |
dda83cd7 SM |
10227 | error |
10228 | (_("Fixed-point values must be assigned to fixed-point variables")); | |
d2e4a39e | 10229 | else |
dda83cd7 | 10230 | arg2 = coerce_for_assign (value_type (arg1), arg2); |
4c4b4cd2 | 10231 | return ada_value_assign (arg1, arg2); |
14f9c5c9 AS |
10232 | |
10233 | case BINOP_ADD: | |
10234 | arg1 = evaluate_subexp_with_coercion (exp, pos, noside); | |
10235 | arg2 = evaluate_subexp_with_coercion (exp, pos, noside); | |
10236 | if (noside == EVAL_SKIP) | |
dda83cd7 | 10237 | goto nosideret; |
78134374 | 10238 | if (value_type (arg1)->code () == TYPE_CODE_PTR) |
dda83cd7 SM |
10239 | return (value_from_longest |
10240 | (value_type (arg1), | |
10241 | value_as_long (arg1) + value_as_long (arg2))); | |
78134374 | 10242 | if (value_type (arg2)->code () == TYPE_CODE_PTR) |
dda83cd7 SM |
10243 | return (value_from_longest |
10244 | (value_type (arg2), | |
10245 | value_as_long (arg1) + value_as_long (arg2))); | |
b2188a06 | 10246 | if ((ada_is_gnat_encoded_fixed_point_type (value_type (arg1)) |
dda83cd7 SM |
10247 | || ada_is_gnat_encoded_fixed_point_type (value_type (arg2))) |
10248 | && value_type (arg1) != value_type (arg2)) | |
10249 | error (_("Operands of fixed-point addition must have the same type")); | |
b7789565 | 10250 | /* Do the addition, and cast the result to the type of the first |
dda83cd7 SM |
10251 | argument. We cannot cast the result to a reference type, so if |
10252 | ARG1 is a reference type, find its underlying type. */ | |
b7789565 | 10253 | type = value_type (arg1); |
78134374 | 10254 | while (type->code () == TYPE_CODE_REF) |
dda83cd7 | 10255 | type = TYPE_TARGET_TYPE (type); |
f44316fa | 10256 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); |
89eef114 | 10257 | return value_cast (type, value_binop (arg1, arg2, BINOP_ADD)); |
14f9c5c9 AS |
10258 | |
10259 | case BINOP_SUB: | |
10260 | arg1 = evaluate_subexp_with_coercion (exp, pos, noside); | |
10261 | arg2 = evaluate_subexp_with_coercion (exp, pos, noside); | |
10262 | if (noside == EVAL_SKIP) | |
dda83cd7 | 10263 | goto nosideret; |
78134374 | 10264 | if (value_type (arg1)->code () == TYPE_CODE_PTR) |
dda83cd7 SM |
10265 | return (value_from_longest |
10266 | (value_type (arg1), | |
10267 | value_as_long (arg1) - value_as_long (arg2))); | |
78134374 | 10268 | if (value_type (arg2)->code () == TYPE_CODE_PTR) |
dda83cd7 SM |
10269 | return (value_from_longest |
10270 | (value_type (arg2), | |
10271 | value_as_long (arg1) - value_as_long (arg2))); | |
b2188a06 | 10272 | if ((ada_is_gnat_encoded_fixed_point_type (value_type (arg1)) |
dda83cd7 SM |
10273 | || ada_is_gnat_encoded_fixed_point_type (value_type (arg2))) |
10274 | && value_type (arg1) != value_type (arg2)) | |
10275 | error (_("Operands of fixed-point subtraction " | |
0963b4bd | 10276 | "must have the same type")); |
b7789565 | 10277 | /* Do the substraction, and cast the result to the type of the first |
dda83cd7 SM |
10278 | argument. We cannot cast the result to a reference type, so if |
10279 | ARG1 is a reference type, find its underlying type. */ | |
b7789565 | 10280 | type = value_type (arg1); |
78134374 | 10281 | while (type->code () == TYPE_CODE_REF) |
dda83cd7 | 10282 | type = TYPE_TARGET_TYPE (type); |
f44316fa | 10283 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); |
89eef114 | 10284 | return value_cast (type, value_binop (arg1, arg2, BINOP_SUB)); |
14f9c5c9 AS |
10285 | |
10286 | case BINOP_MUL: | |
10287 | case BINOP_DIV: | |
e1578042 JB |
10288 | case BINOP_REM: |
10289 | case BINOP_MOD: | |
fe1fe7ea SM |
10290 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
10291 | arg2 = evaluate_subexp (nullptr, exp, pos, noside); | |
14f9c5c9 | 10292 | if (noside == EVAL_SKIP) |
dda83cd7 | 10293 | goto nosideret; |
e1578042 | 10294 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) |
dda83cd7 SM |
10295 | { |
10296 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
10297 | return value_zero (value_type (arg1), not_lval); | |
10298 | } | |
14f9c5c9 | 10299 | else |
dda83cd7 SM |
10300 | { |
10301 | type = builtin_type (exp->gdbarch)->builtin_double; | |
10302 | if (ada_is_gnat_encoded_fixed_point_type (value_type (arg1))) | |
10303 | arg1 = cast_from_gnat_encoded_fixed_point_type (type, arg1); | |
10304 | if (ada_is_gnat_encoded_fixed_point_type (value_type (arg2))) | |
10305 | arg2 = cast_from_gnat_encoded_fixed_point_type (type, arg2); | |
10306 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
10307 | return ada_value_binop (arg1, arg2, op); | |
10308 | } | |
4c4b4cd2 | 10309 | |
4c4b4cd2 PH |
10310 | case BINOP_EQUAL: |
10311 | case BINOP_NOTEQUAL: | |
fe1fe7ea | 10312 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
df407dfe | 10313 | arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside); |
14f9c5c9 | 10314 | if (noside == EVAL_SKIP) |
dda83cd7 | 10315 | goto nosideret; |
4c4b4cd2 | 10316 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
dda83cd7 | 10317 | tem = 0; |
4c4b4cd2 | 10318 | else |
f44316fa UW |
10319 | { |
10320 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
10321 | tem = ada_value_equal (arg1, arg2); | |
10322 | } | |
4c4b4cd2 | 10323 | if (op == BINOP_NOTEQUAL) |
dda83cd7 | 10324 | tem = !tem; |
fbb06eb1 UW |
10325 | type = language_bool_type (exp->language_defn, exp->gdbarch); |
10326 | return value_from_longest (type, (LONGEST) tem); | |
4c4b4cd2 PH |
10327 | |
10328 | case UNOP_NEG: | |
fe1fe7ea | 10329 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
4c4b4cd2 | 10330 | if (noside == EVAL_SKIP) |
dda83cd7 | 10331 | goto nosideret; |
b2188a06 | 10332 | else if (ada_is_gnat_encoded_fixed_point_type (value_type (arg1))) |
dda83cd7 | 10333 | return value_cast (value_type (arg1), value_neg (arg1)); |
14f9c5c9 | 10334 | else |
f44316fa UW |
10335 | { |
10336 | unop_promote (exp->language_defn, exp->gdbarch, &arg1); | |
10337 | return value_neg (arg1); | |
10338 | } | |
4c4b4cd2 | 10339 | |
2330c6c6 JB |
10340 | case BINOP_LOGICAL_AND: |
10341 | case BINOP_LOGICAL_OR: | |
10342 | case UNOP_LOGICAL_NOT: | |
000d5124 | 10343 | { |
dda83cd7 | 10344 | struct value *val; |
000d5124 | 10345 | |
dda83cd7 SM |
10346 | *pos -= 1; |
10347 | val = evaluate_subexp_standard (expect_type, exp, pos, noside); | |
fbb06eb1 | 10348 | type = language_bool_type (exp->language_defn, exp->gdbarch); |
dda83cd7 | 10349 | return value_cast (type, val); |
000d5124 | 10350 | } |
2330c6c6 JB |
10351 | |
10352 | case BINOP_BITWISE_AND: | |
10353 | case BINOP_BITWISE_IOR: | |
10354 | case BINOP_BITWISE_XOR: | |
000d5124 | 10355 | { |
dda83cd7 | 10356 | struct value *val; |
000d5124 | 10357 | |
fe1fe7ea SM |
10358 | arg1 = evaluate_subexp (nullptr, exp, pos, EVAL_AVOID_SIDE_EFFECTS); |
10359 | *pos = pc; | |
dda83cd7 | 10360 | val = evaluate_subexp_standard (expect_type, exp, pos, noside); |
000d5124 | 10361 | |
dda83cd7 | 10362 | return value_cast (value_type (arg1), val); |
000d5124 | 10363 | } |
2330c6c6 | 10364 | |
14f9c5c9 AS |
10365 | case OP_VAR_VALUE: |
10366 | *pos -= 1; | |
6799def4 | 10367 | |
14f9c5c9 | 10368 | if (noside == EVAL_SKIP) |
dda83cd7 SM |
10369 | { |
10370 | *pos += 4; | |
10371 | goto nosideret; | |
10372 | } | |
da5c522f JB |
10373 | |
10374 | if (SYMBOL_DOMAIN (exp->elts[pc + 2].symbol) == UNDEF_DOMAIN) | |
dda83cd7 SM |
10375 | /* Only encountered when an unresolved symbol occurs in a |
10376 | context other than a function call, in which case, it is | |
10377 | invalid. */ | |
10378 | error (_("Unexpected unresolved symbol, %s, during evaluation"), | |
10379 | exp->elts[pc + 2].symbol->print_name ()); | |
da5c522f JB |
10380 | |
10381 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
dda83cd7 SM |
10382 | { |
10383 | type = static_unwrap_type (SYMBOL_TYPE (exp->elts[pc + 2].symbol)); | |
10384 | /* Check to see if this is a tagged type. We also need to handle | |
10385 | the case where the type is a reference to a tagged type, but | |
10386 | we have to be careful to exclude pointers to tagged types. | |
10387 | The latter should be shown as usual (as a pointer), whereas | |
10388 | a reference should mostly be transparent to the user. */ | |
10389 | if (ada_is_tagged_type (type, 0) | |
10390 | || (type->code () == TYPE_CODE_REF | |
10391 | && ada_is_tagged_type (TYPE_TARGET_TYPE (type), 0))) | |
0d72a7c3 JB |
10392 | { |
10393 | /* Tagged types are a little special in the fact that the real | |
10394 | type is dynamic and can only be determined by inspecting the | |
10395 | object's tag. This means that we need to get the object's | |
10396 | value first (EVAL_NORMAL) and then extract the actual object | |
10397 | type from its tag. | |
10398 | ||
10399 | Note that we cannot skip the final step where we extract | |
10400 | the object type from its tag, because the EVAL_NORMAL phase | |
10401 | results in dynamic components being resolved into fixed ones. | |
10402 | This can cause problems when trying to print the type | |
10403 | description of tagged types whose parent has a dynamic size: | |
10404 | We use the type name of the "_parent" component in order | |
10405 | to print the name of the ancestor type in the type description. | |
10406 | If that component had a dynamic size, the resolution into | |
10407 | a fixed type would result in the loss of that type name, | |
10408 | thus preventing us from printing the name of the ancestor | |
10409 | type in the type description. */ | |
fe1fe7ea | 10410 | arg1 = evaluate_subexp (nullptr, exp, pos, EVAL_NORMAL); |
0d72a7c3 | 10411 | |
78134374 | 10412 | if (type->code () != TYPE_CODE_REF) |
0d72a7c3 JB |
10413 | { |
10414 | struct type *actual_type; | |
10415 | ||
10416 | actual_type = type_from_tag (ada_value_tag (arg1)); | |
10417 | if (actual_type == NULL) | |
10418 | /* If, for some reason, we were unable to determine | |
10419 | the actual type from the tag, then use the static | |
10420 | approximation that we just computed as a fallback. | |
10421 | This can happen if the debugging information is | |
10422 | incomplete, for instance. */ | |
10423 | actual_type = type; | |
10424 | return value_zero (actual_type, not_lval); | |
10425 | } | |
10426 | else | |
10427 | { | |
10428 | /* In the case of a ref, ada_coerce_ref takes care | |
10429 | of determining the actual type. But the evaluation | |
10430 | should return a ref as it should be valid to ask | |
10431 | for its address; so rebuild a ref after coerce. */ | |
10432 | arg1 = ada_coerce_ref (arg1); | |
a65cfae5 | 10433 | return value_ref (arg1, TYPE_CODE_REF); |
0d72a7c3 JB |
10434 | } |
10435 | } | |
0c1f74cf | 10436 | |
84754697 JB |
10437 | /* Records and unions for which GNAT encodings have been |
10438 | generated need to be statically fixed as well. | |
10439 | Otherwise, non-static fixing produces a type where | |
10440 | all dynamic properties are removed, which prevents "ptype" | |
10441 | from being able to completely describe the type. | |
10442 | For instance, a case statement in a variant record would be | |
10443 | replaced by the relevant components based on the actual | |
10444 | value of the discriminants. */ | |
78134374 | 10445 | if ((type->code () == TYPE_CODE_STRUCT |
84754697 | 10446 | && dynamic_template_type (type) != NULL) |
78134374 | 10447 | || (type->code () == TYPE_CODE_UNION |
84754697 JB |
10448 | && ada_find_parallel_type (type, "___XVU") != NULL)) |
10449 | { | |
10450 | *pos += 4; | |
10451 | return value_zero (to_static_fixed_type (type), not_lval); | |
10452 | } | |
dda83cd7 | 10453 | } |
da5c522f JB |
10454 | |
10455 | arg1 = evaluate_subexp_standard (expect_type, exp, pos, noside); | |
10456 | return ada_to_fixed_value (arg1); | |
4c4b4cd2 PH |
10457 | |
10458 | case OP_FUNCALL: | |
10459 | (*pos) += 2; | |
10460 | ||
10461 | /* Allocate arg vector, including space for the function to be | |
dda83cd7 | 10462 | called in argvec[0] and a terminating NULL. */ |
4c4b4cd2 | 10463 | nargs = longest_to_int (exp->elts[pc + 1].longconst); |
8d749320 | 10464 | argvec = XALLOCAVEC (struct value *, nargs + 2); |
4c4b4cd2 PH |
10465 | |
10466 | if (exp->elts[*pos].opcode == OP_VAR_VALUE | |
dda83cd7 SM |
10467 | && SYMBOL_DOMAIN (exp->elts[pc + 5].symbol) == UNDEF_DOMAIN) |
10468 | error (_("Unexpected unresolved symbol, %s, during evaluation"), | |
10469 | exp->elts[pc + 5].symbol->print_name ()); | |
4c4b4cd2 | 10470 | else |
dda83cd7 SM |
10471 | { |
10472 | for (tem = 0; tem <= nargs; tem += 1) | |
fe1fe7ea SM |
10473 | argvec[tem] = evaluate_subexp (nullptr, exp, pos, noside); |
10474 | argvec[tem] = 0; | |
4c4b4cd2 | 10475 | |
dda83cd7 SM |
10476 | if (noside == EVAL_SKIP) |
10477 | goto nosideret; | |
10478 | } | |
4c4b4cd2 | 10479 | |
ad82864c JB |
10480 | if (ada_is_constrained_packed_array_type |
10481 | (desc_base_type (value_type (argvec[0])))) | |
dda83cd7 | 10482 | argvec[0] = ada_coerce_to_simple_array (argvec[0]); |
78134374 | 10483 | else if (value_type (argvec[0])->code () == TYPE_CODE_ARRAY |
dda83cd7 SM |
10484 | && TYPE_FIELD_BITSIZE (value_type (argvec[0]), 0) != 0) |
10485 | /* This is a packed array that has already been fixed, and | |
284614f0 JB |
10486 | therefore already coerced to a simple array. Nothing further |
10487 | to do. */ | |
dda83cd7 | 10488 | ; |
78134374 | 10489 | else if (value_type (argvec[0])->code () == TYPE_CODE_REF) |
e6c2c623 PMR |
10490 | { |
10491 | /* Make sure we dereference references so that all the code below | |
10492 | feels like it's really handling the referenced value. Wrapping | |
10493 | types (for alignment) may be there, so make sure we strip them as | |
10494 | well. */ | |
10495 | argvec[0] = ada_to_fixed_value (coerce_ref (argvec[0])); | |
10496 | } | |
78134374 | 10497 | else if (value_type (argvec[0])->code () == TYPE_CODE_ARRAY |
e6c2c623 PMR |
10498 | && VALUE_LVAL (argvec[0]) == lval_memory) |
10499 | argvec[0] = value_addr (argvec[0]); | |
4c4b4cd2 | 10500 | |
df407dfe | 10501 | type = ada_check_typedef (value_type (argvec[0])); |
720d1a40 JB |
10502 | |
10503 | /* Ada allows us to implicitly dereference arrays when subscripting | |
8f465ea7 JB |
10504 | them. So, if this is an array typedef (encoding use for array |
10505 | access types encoded as fat pointers), strip it now. */ | |
78134374 | 10506 | if (type->code () == TYPE_CODE_TYPEDEF) |
720d1a40 JB |
10507 | type = ada_typedef_target_type (type); |
10508 | ||
78134374 | 10509 | if (type->code () == TYPE_CODE_PTR) |
dda83cd7 SM |
10510 | { |
10511 | switch (ada_check_typedef (TYPE_TARGET_TYPE (type))->code ()) | |
10512 | { | |
10513 | case TYPE_CODE_FUNC: | |
10514 | type = ada_check_typedef (TYPE_TARGET_TYPE (type)); | |
10515 | break; | |
10516 | case TYPE_CODE_ARRAY: | |
10517 | break; | |
10518 | case TYPE_CODE_STRUCT: | |
10519 | if (noside != EVAL_AVOID_SIDE_EFFECTS) | |
10520 | argvec[0] = ada_value_ind (argvec[0]); | |
10521 | type = ada_check_typedef (TYPE_TARGET_TYPE (type)); | |
10522 | break; | |
10523 | default: | |
10524 | error (_("cannot subscript or call something of type `%s'"), | |
10525 | ada_type_name (value_type (argvec[0]))); | |
10526 | break; | |
10527 | } | |
10528 | } | |
4c4b4cd2 | 10529 | |
78134374 | 10530 | switch (type->code ()) |
dda83cd7 SM |
10531 | { |
10532 | case TYPE_CODE_FUNC: | |
10533 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
c8ea1972 | 10534 | { |
7022349d PA |
10535 | if (TYPE_TARGET_TYPE (type) == NULL) |
10536 | error_call_unknown_return_type (NULL); | |
10537 | return allocate_value (TYPE_TARGET_TYPE (type)); | |
c8ea1972 | 10538 | } |
e71585ff PA |
10539 | return call_function_by_hand (argvec[0], NULL, |
10540 | gdb::make_array_view (argvec + 1, | |
10541 | nargs)); | |
c8ea1972 PH |
10542 | case TYPE_CODE_INTERNAL_FUNCTION: |
10543 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
10544 | /* We don't know anything about what the internal | |
10545 | function might return, but we have to return | |
10546 | something. */ | |
10547 | return value_zero (builtin_type (exp->gdbarch)->builtin_int, | |
10548 | not_lval); | |
10549 | else | |
10550 | return call_internal_function (exp->gdbarch, exp->language_defn, | |
10551 | argvec[0], nargs, argvec + 1); | |
10552 | ||
dda83cd7 SM |
10553 | case TYPE_CODE_STRUCT: |
10554 | { | |
10555 | int arity; | |
10556 | ||
10557 | arity = ada_array_arity (type); | |
10558 | type = ada_array_element_type (type, nargs); | |
10559 | if (type == NULL) | |
10560 | error (_("cannot subscript or call a record")); | |
10561 | if (arity != nargs) | |
10562 | error (_("wrong number of subscripts; expecting %d"), arity); | |
10563 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
10564 | return value_zero (ada_aligned_type (type), lval_memory); | |
10565 | return | |
10566 | unwrap_value (ada_value_subscript | |
10567 | (argvec[0], nargs, argvec + 1)); | |
10568 | } | |
10569 | case TYPE_CODE_ARRAY: | |
10570 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
10571 | { | |
10572 | type = ada_array_element_type (type, nargs); | |
10573 | if (type == NULL) | |
10574 | error (_("element type of array unknown")); | |
10575 | else | |
10576 | return value_zero (ada_aligned_type (type), lval_memory); | |
10577 | } | |
10578 | return | |
10579 | unwrap_value (ada_value_subscript | |
10580 | (ada_coerce_to_simple_array (argvec[0]), | |
10581 | nargs, argvec + 1)); | |
10582 | case TYPE_CODE_PTR: /* Pointer to array */ | |
10583 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
10584 | { | |
deede10c | 10585 | type = to_fixed_array_type (TYPE_TARGET_TYPE (type), NULL, 1); |
dda83cd7 SM |
10586 | type = ada_array_element_type (type, nargs); |
10587 | if (type == NULL) | |
10588 | error (_("element type of array unknown")); | |
10589 | else | |
10590 | return value_zero (ada_aligned_type (type), lval_memory); | |
10591 | } | |
10592 | return | |
10593 | unwrap_value (ada_value_ptr_subscript (argvec[0], | |
deede10c | 10594 | nargs, argvec + 1)); |
4c4b4cd2 | 10595 | |
dda83cd7 SM |
10596 | default: |
10597 | error (_("Attempt to index or call something other than an " | |
e1d5a0d2 | 10598 | "array or function")); |
dda83cd7 | 10599 | } |
4c4b4cd2 PH |
10600 | |
10601 | case TERNOP_SLICE: | |
10602 | { | |
fe1fe7ea SM |
10603 | struct value *array = evaluate_subexp (nullptr, exp, pos, noside); |
10604 | struct value *low_bound_val | |
10605 | = evaluate_subexp (nullptr, exp, pos, noside); | |
10606 | struct value *high_bound_val | |
10607 | = evaluate_subexp (nullptr, exp, pos, noside); | |
10608 | LONGEST low_bound; | |
dda83cd7 SM |
10609 | LONGEST high_bound; |
10610 | ||
10611 | low_bound_val = coerce_ref (low_bound_val); | |
10612 | high_bound_val = coerce_ref (high_bound_val); | |
10613 | low_bound = value_as_long (low_bound_val); | |
10614 | high_bound = value_as_long (high_bound_val); | |
10615 | ||
10616 | if (noside == EVAL_SKIP) | |
10617 | goto nosideret; | |
10618 | ||
10619 | /* If this is a reference to an aligner type, then remove all | |
10620 | the aligners. */ | |
10621 | if (value_type (array)->code () == TYPE_CODE_REF | |
10622 | && ada_is_aligner_type (TYPE_TARGET_TYPE (value_type (array)))) | |
10623 | TYPE_TARGET_TYPE (value_type (array)) = | |
10624 | ada_aligned_type (TYPE_TARGET_TYPE (value_type (array))); | |
10625 | ||
c9a28cbe | 10626 | if (ada_is_any_packed_array_type (value_type (array))) |
dda83cd7 SM |
10627 | error (_("cannot slice a packed array")); |
10628 | ||
10629 | /* If this is a reference to an array or an array lvalue, | |
10630 | convert to a pointer. */ | |
10631 | if (value_type (array)->code () == TYPE_CODE_REF | |
10632 | || (value_type (array)->code () == TYPE_CODE_ARRAY | |
10633 | && VALUE_LVAL (array) == lval_memory)) | |
10634 | array = value_addr (array); | |
10635 | ||
10636 | if (noside == EVAL_AVOID_SIDE_EFFECTS | |
10637 | && ada_is_array_descriptor_type (ada_check_typedef | |
10638 | (value_type (array)))) | |
10639 | return empty_array (ada_type_of_array (array, 0), low_bound, | |
bff8c71f | 10640 | high_bound); |
4c4b4cd2 | 10641 | |
dda83cd7 SM |
10642 | array = ada_coerce_to_simple_array_ptr (array); |
10643 | ||
10644 | /* If we have more than one level of pointer indirection, | |
10645 | dereference the value until we get only one level. */ | |
10646 | while (value_type (array)->code () == TYPE_CODE_PTR | |
10647 | && (TYPE_TARGET_TYPE (value_type (array))->code () | |
10648 | == TYPE_CODE_PTR)) | |
10649 | array = value_ind (array); | |
10650 | ||
10651 | /* Make sure we really do have an array type before going further, | |
10652 | to avoid a SEGV when trying to get the index type or the target | |
10653 | type later down the road if the debug info generated by | |
10654 | the compiler is incorrect or incomplete. */ | |
10655 | if (!ada_is_simple_array_type (value_type (array))) | |
10656 | error (_("cannot take slice of non-array")); | |
10657 | ||
10658 | if (ada_check_typedef (value_type (array))->code () | |
10659 | == TYPE_CODE_PTR) | |
10660 | { | |
10661 | struct type *type0 = ada_check_typedef (value_type (array)); | |
10662 | ||
10663 | if (high_bound < low_bound || noside == EVAL_AVOID_SIDE_EFFECTS) | |
10664 | return empty_array (TYPE_TARGET_TYPE (type0), low_bound, high_bound); | |
10665 | else | |
10666 | { | |
10667 | struct type *arr_type0 = | |
10668 | to_fixed_array_type (TYPE_TARGET_TYPE (type0), NULL, 1); | |
10669 | ||
10670 | return ada_value_slice_from_ptr (array, arr_type0, | |
10671 | longest_to_int (low_bound), | |
10672 | longest_to_int (high_bound)); | |
10673 | } | |
10674 | } | |
10675 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
10676 | return array; | |
10677 | else if (high_bound < low_bound) | |
10678 | return empty_array (value_type (array), low_bound, high_bound); | |
10679 | else | |
10680 | return ada_value_slice (array, longest_to_int (low_bound), | |
529cad9c | 10681 | longest_to_int (high_bound)); |
4c4b4cd2 | 10682 | } |
14f9c5c9 | 10683 | |
4c4b4cd2 PH |
10684 | case UNOP_IN_RANGE: |
10685 | (*pos) += 2; | |
fe1fe7ea | 10686 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
8008e265 | 10687 | type = check_typedef (exp->elts[pc + 1].type); |
14f9c5c9 | 10688 | |
14f9c5c9 | 10689 | if (noside == EVAL_SKIP) |
dda83cd7 | 10690 | goto nosideret; |
14f9c5c9 | 10691 | |
78134374 | 10692 | switch (type->code ()) |
dda83cd7 SM |
10693 | { |
10694 | default: | |
10695 | lim_warning (_("Membership test incompletely implemented; " | |
e1d5a0d2 | 10696 | "always returns true")); |
fbb06eb1 UW |
10697 | type = language_bool_type (exp->language_defn, exp->gdbarch); |
10698 | return value_from_longest (type, (LONGEST) 1); | |
4c4b4cd2 | 10699 | |
dda83cd7 | 10700 | case TYPE_CODE_RANGE: |
5537ddd0 SM |
10701 | arg2 = value_from_longest (type, |
10702 | type->bounds ()->low.const_val ()); | |
10703 | arg3 = value_from_longest (type, | |
10704 | type->bounds ()->high.const_val ()); | |
f44316fa UW |
10705 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); |
10706 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg3); | |
fbb06eb1 UW |
10707 | type = language_bool_type (exp->language_defn, exp->gdbarch); |
10708 | return | |
10709 | value_from_longest (type, | |
dda83cd7 SM |
10710 | (value_less (arg1, arg3) |
10711 | || value_equal (arg1, arg3)) | |
10712 | && (value_less (arg2, arg1) | |
10713 | || value_equal (arg2, arg1))); | |
10714 | } | |
4c4b4cd2 PH |
10715 | |
10716 | case BINOP_IN_BOUNDS: | |
14f9c5c9 | 10717 | (*pos) += 2; |
fe1fe7ea SM |
10718 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
10719 | arg2 = evaluate_subexp (nullptr, exp, pos, noside); | |
14f9c5c9 | 10720 | |
4c4b4cd2 | 10721 | if (noside == EVAL_SKIP) |
dda83cd7 | 10722 | goto nosideret; |
14f9c5c9 | 10723 | |
4c4b4cd2 | 10724 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
fbb06eb1 UW |
10725 | { |
10726 | type = language_bool_type (exp->language_defn, exp->gdbarch); | |
10727 | return value_zero (type, not_lval); | |
10728 | } | |
14f9c5c9 | 10729 | |
4c4b4cd2 | 10730 | tem = longest_to_int (exp->elts[pc + 1].longconst); |
14f9c5c9 | 10731 | |
1eea4ebd UW |
10732 | type = ada_index_type (value_type (arg2), tem, "range"); |
10733 | if (!type) | |
10734 | type = value_type (arg1); | |
14f9c5c9 | 10735 | |
1eea4ebd UW |
10736 | arg3 = value_from_longest (type, ada_array_bound (arg2, tem, 1)); |
10737 | arg2 = value_from_longest (type, ada_array_bound (arg2, tem, 0)); | |
d2e4a39e | 10738 | |
f44316fa UW |
10739 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); |
10740 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg3); | |
fbb06eb1 | 10741 | type = language_bool_type (exp->language_defn, exp->gdbarch); |
4c4b4cd2 | 10742 | return |
dda83cd7 SM |
10743 | value_from_longest (type, |
10744 | (value_less (arg1, arg3) | |
10745 | || value_equal (arg1, arg3)) | |
10746 | && (value_less (arg2, arg1) | |
10747 | || value_equal (arg2, arg1))); | |
4c4b4cd2 PH |
10748 | |
10749 | case TERNOP_IN_RANGE: | |
fe1fe7ea SM |
10750 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
10751 | arg2 = evaluate_subexp (nullptr, exp, pos, noside); | |
10752 | arg3 = evaluate_subexp (nullptr, exp, pos, noside); | |
4c4b4cd2 PH |
10753 | |
10754 | if (noside == EVAL_SKIP) | |
dda83cd7 | 10755 | goto nosideret; |
4c4b4cd2 | 10756 | |
f44316fa UW |
10757 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); |
10758 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg3); | |
fbb06eb1 | 10759 | type = language_bool_type (exp->language_defn, exp->gdbarch); |
4c4b4cd2 | 10760 | return |
dda83cd7 SM |
10761 | value_from_longest (type, |
10762 | (value_less (arg1, arg3) | |
10763 | || value_equal (arg1, arg3)) | |
10764 | && (value_less (arg2, arg1) | |
10765 | || value_equal (arg2, arg1))); | |
4c4b4cd2 PH |
10766 | |
10767 | case OP_ATR_FIRST: | |
10768 | case OP_ATR_LAST: | |
10769 | case OP_ATR_LENGTH: | |
10770 | { | |
dda83cd7 | 10771 | struct type *type_arg; |
5b4ee69b | 10772 | |
dda83cd7 SM |
10773 | if (exp->elts[*pos].opcode == OP_TYPE) |
10774 | { | |
fe1fe7ea SM |
10775 | evaluate_subexp (nullptr, exp, pos, EVAL_SKIP); |
10776 | arg1 = NULL; | |
dda83cd7 SM |
10777 | type_arg = check_typedef (exp->elts[pc + 2].type); |
10778 | } | |
10779 | else | |
10780 | { | |
fe1fe7ea SM |
10781 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
10782 | type_arg = NULL; | |
dda83cd7 | 10783 | } |
76a01679 | 10784 | |
dda83cd7 SM |
10785 | if (exp->elts[*pos].opcode != OP_LONG) |
10786 | error (_("Invalid operand to '%s"), ada_attribute_name (op)); | |
10787 | tem = longest_to_int (exp->elts[*pos + 2].longconst); | |
10788 | *pos += 4; | |
76a01679 | 10789 | |
dda83cd7 SM |
10790 | if (noside == EVAL_SKIP) |
10791 | goto nosideret; | |
680e1bee TT |
10792 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) |
10793 | { | |
10794 | if (type_arg == NULL) | |
10795 | type_arg = value_type (arg1); | |
76a01679 | 10796 | |
dda83cd7 | 10797 | if (ada_is_constrained_packed_array_type (type_arg)) |
680e1bee TT |
10798 | type_arg = decode_constrained_packed_array_type (type_arg); |
10799 | ||
10800 | if (!discrete_type_p (type_arg)) | |
10801 | { | |
10802 | switch (op) | |
10803 | { | |
10804 | default: /* Should never happen. */ | |
10805 | error (_("unexpected attribute encountered")); | |
10806 | case OP_ATR_FIRST: | |
10807 | case OP_ATR_LAST: | |
10808 | type_arg = ada_index_type (type_arg, tem, | |
10809 | ada_attribute_name (op)); | |
10810 | break; | |
10811 | case OP_ATR_LENGTH: | |
10812 | type_arg = builtin_type (exp->gdbarch)->builtin_int; | |
10813 | break; | |
10814 | } | |
10815 | } | |
10816 | ||
10817 | return value_zero (type_arg, not_lval); | |
10818 | } | |
dda83cd7 SM |
10819 | else if (type_arg == NULL) |
10820 | { | |
10821 | arg1 = ada_coerce_ref (arg1); | |
76a01679 | 10822 | |
dda83cd7 SM |
10823 | if (ada_is_constrained_packed_array_type (value_type (arg1))) |
10824 | arg1 = ada_coerce_to_simple_array (arg1); | |
76a01679 | 10825 | |
dda83cd7 | 10826 | if (op == OP_ATR_LENGTH) |
1eea4ebd | 10827 | type = builtin_type (exp->gdbarch)->builtin_int; |
aa4fb036 JB |
10828 | else |
10829 | { | |
10830 | type = ada_index_type (value_type (arg1), tem, | |
10831 | ada_attribute_name (op)); | |
10832 | if (type == NULL) | |
10833 | type = builtin_type (exp->gdbarch)->builtin_int; | |
10834 | } | |
76a01679 | 10835 | |
dda83cd7 SM |
10836 | switch (op) |
10837 | { | |
10838 | default: /* Should never happen. */ | |
10839 | error (_("unexpected attribute encountered")); | |
10840 | case OP_ATR_FIRST: | |
10841 | return value_from_longest | |
1eea4ebd | 10842 | (type, ada_array_bound (arg1, tem, 0)); |
dda83cd7 SM |
10843 | case OP_ATR_LAST: |
10844 | return value_from_longest | |
1eea4ebd | 10845 | (type, ada_array_bound (arg1, tem, 1)); |
dda83cd7 SM |
10846 | case OP_ATR_LENGTH: |
10847 | return value_from_longest | |
1eea4ebd | 10848 | (type, ada_array_length (arg1, tem)); |
dda83cd7 SM |
10849 | } |
10850 | } | |
10851 | else if (discrete_type_p (type_arg)) | |
10852 | { | |
10853 | struct type *range_type; | |
10854 | const char *name = ada_type_name (type_arg); | |
10855 | ||
10856 | range_type = NULL; | |
10857 | if (name != NULL && type_arg->code () != TYPE_CODE_ENUM) | |
10858 | range_type = to_fixed_range_type (type_arg, NULL); | |
10859 | if (range_type == NULL) | |
10860 | range_type = type_arg; | |
10861 | switch (op) | |
10862 | { | |
10863 | default: | |
10864 | error (_("unexpected attribute encountered")); | |
10865 | case OP_ATR_FIRST: | |
690cc4eb | 10866 | return value_from_longest |
43bbcdc2 | 10867 | (range_type, ada_discrete_type_low_bound (range_type)); |
dda83cd7 SM |
10868 | case OP_ATR_LAST: |
10869 | return value_from_longest | |
43bbcdc2 | 10870 | (range_type, ada_discrete_type_high_bound (range_type)); |
dda83cd7 SM |
10871 | case OP_ATR_LENGTH: |
10872 | error (_("the 'length attribute applies only to array types")); | |
10873 | } | |
10874 | } | |
10875 | else if (type_arg->code () == TYPE_CODE_FLT) | |
10876 | error (_("unimplemented type attribute")); | |
10877 | else | |
10878 | { | |
10879 | LONGEST low, high; | |
10880 | ||
10881 | if (ada_is_constrained_packed_array_type (type_arg)) | |
10882 | type_arg = decode_constrained_packed_array_type (type_arg); | |
76a01679 | 10883 | |
aa4fb036 | 10884 | if (op == OP_ATR_LENGTH) |
1eea4ebd | 10885 | type = builtin_type (exp->gdbarch)->builtin_int; |
aa4fb036 JB |
10886 | else |
10887 | { | |
10888 | type = ada_index_type (type_arg, tem, ada_attribute_name (op)); | |
10889 | if (type == NULL) | |
10890 | type = builtin_type (exp->gdbarch)->builtin_int; | |
10891 | } | |
1eea4ebd | 10892 | |
dda83cd7 SM |
10893 | switch (op) |
10894 | { | |
10895 | default: | |
10896 | error (_("unexpected attribute encountered")); | |
10897 | case OP_ATR_FIRST: | |
10898 | low = ada_array_bound_from_type (type_arg, tem, 0); | |
10899 | return value_from_longest (type, low); | |
10900 | case OP_ATR_LAST: | |
10901 | high = ada_array_bound_from_type (type_arg, tem, 1); | |
10902 | return value_from_longest (type, high); | |
10903 | case OP_ATR_LENGTH: | |
10904 | low = ada_array_bound_from_type (type_arg, tem, 0); | |
10905 | high = ada_array_bound_from_type (type_arg, tem, 1); | |
10906 | return value_from_longest (type, high - low + 1); | |
10907 | } | |
10908 | } | |
14f9c5c9 AS |
10909 | } |
10910 | ||
4c4b4cd2 | 10911 | case OP_ATR_TAG: |
fe1fe7ea | 10912 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
4c4b4cd2 | 10913 | if (noside == EVAL_SKIP) |
dda83cd7 | 10914 | goto nosideret; |
4c4b4cd2 PH |
10915 | |
10916 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
dda83cd7 | 10917 | return value_zero (ada_tag_type (arg1), not_lval); |
4c4b4cd2 PH |
10918 | |
10919 | return ada_value_tag (arg1); | |
10920 | ||
10921 | case OP_ATR_MIN: | |
10922 | case OP_ATR_MAX: | |
fe1fe7ea SM |
10923 | evaluate_subexp (nullptr, exp, pos, EVAL_SKIP); |
10924 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); | |
10925 | arg2 = evaluate_subexp (nullptr, exp, pos, noside); | |
14f9c5c9 | 10926 | if (noside == EVAL_SKIP) |
dda83cd7 | 10927 | goto nosideret; |
d2e4a39e | 10928 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) |
dda83cd7 | 10929 | return value_zero (value_type (arg1), not_lval); |
14f9c5c9 | 10930 | else |
f44316fa UW |
10931 | { |
10932 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
10933 | return value_binop (arg1, arg2, | |
10934 | op == OP_ATR_MIN ? BINOP_MIN : BINOP_MAX); | |
10935 | } | |
14f9c5c9 | 10936 | |
4c4b4cd2 PH |
10937 | case OP_ATR_MODULUS: |
10938 | { | |
dda83cd7 | 10939 | struct type *type_arg = check_typedef (exp->elts[pc + 2].type); |
4c4b4cd2 | 10940 | |
fe1fe7ea SM |
10941 | evaluate_subexp (nullptr, exp, pos, EVAL_SKIP); |
10942 | if (noside == EVAL_SKIP) | |
dda83cd7 | 10943 | goto nosideret; |
4c4b4cd2 | 10944 | |
dda83cd7 SM |
10945 | if (!ada_is_modular_type (type_arg)) |
10946 | error (_("'modulus must be applied to modular type")); | |
4c4b4cd2 | 10947 | |
dda83cd7 SM |
10948 | return value_from_longest (TYPE_TARGET_TYPE (type_arg), |
10949 | ada_modulus (type_arg)); | |
4c4b4cd2 PH |
10950 | } |
10951 | ||
10952 | ||
10953 | case OP_ATR_POS: | |
fe1fe7ea SM |
10954 | evaluate_subexp (nullptr, exp, pos, EVAL_SKIP); |
10955 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); | |
14f9c5c9 | 10956 | if (noside == EVAL_SKIP) |
dda83cd7 | 10957 | goto nosideret; |
3cb382c9 UW |
10958 | type = builtin_type (exp->gdbarch)->builtin_int; |
10959 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
10960 | return value_zero (type, not_lval); | |
14f9c5c9 | 10961 | else |
3cb382c9 | 10962 | return value_pos_atr (type, arg1); |
14f9c5c9 | 10963 | |
4c4b4cd2 | 10964 | case OP_ATR_SIZE: |
fe1fe7ea | 10965 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
8c1c099f JB |
10966 | type = value_type (arg1); |
10967 | ||
10968 | /* If the argument is a reference, then dereference its type, since | |
dda83cd7 SM |
10969 | the user is really asking for the size of the actual object, |
10970 | not the size of the pointer. */ | |
78134374 | 10971 | if (type->code () == TYPE_CODE_REF) |
dda83cd7 | 10972 | type = TYPE_TARGET_TYPE (type); |
8c1c099f | 10973 | |
4c4b4cd2 | 10974 | if (noside == EVAL_SKIP) |
dda83cd7 | 10975 | goto nosideret; |
4c4b4cd2 | 10976 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) |
dda83cd7 | 10977 | return value_zero (builtin_type (exp->gdbarch)->builtin_int, not_lval); |
4c4b4cd2 | 10978 | else |
dda83cd7 SM |
10979 | return value_from_longest (builtin_type (exp->gdbarch)->builtin_int, |
10980 | TARGET_CHAR_BIT * TYPE_LENGTH (type)); | |
4c4b4cd2 PH |
10981 | |
10982 | case OP_ATR_VAL: | |
fe1fe7ea SM |
10983 | evaluate_subexp (nullptr, exp, pos, EVAL_SKIP); |
10984 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); | |
4c4b4cd2 | 10985 | type = exp->elts[pc + 2].type; |
14f9c5c9 | 10986 | if (noside == EVAL_SKIP) |
dda83cd7 | 10987 | goto nosideret; |
4c4b4cd2 | 10988 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) |
dda83cd7 | 10989 | return value_zero (type, not_lval); |
4c4b4cd2 | 10990 | else |
dda83cd7 | 10991 | return value_val_atr (type, arg1); |
4c4b4cd2 PH |
10992 | |
10993 | case BINOP_EXP: | |
fe1fe7ea SM |
10994 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
10995 | arg2 = evaluate_subexp (nullptr, exp, pos, noside); | |
4c4b4cd2 | 10996 | if (noside == EVAL_SKIP) |
dda83cd7 | 10997 | goto nosideret; |
4c4b4cd2 | 10998 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) |
dda83cd7 | 10999 | return value_zero (value_type (arg1), not_lval); |
4c4b4cd2 | 11000 | else |
f44316fa UW |
11001 | { |
11002 | /* For integer exponentiation operations, | |
11003 | only promote the first argument. */ | |
11004 | if (is_integral_type (value_type (arg2))) | |
11005 | unop_promote (exp->language_defn, exp->gdbarch, &arg1); | |
11006 | else | |
11007 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
11008 | ||
11009 | return value_binop (arg1, arg2, op); | |
11010 | } | |
4c4b4cd2 PH |
11011 | |
11012 | case UNOP_PLUS: | |
fe1fe7ea | 11013 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
4c4b4cd2 | 11014 | if (noside == EVAL_SKIP) |
dda83cd7 | 11015 | goto nosideret; |
4c4b4cd2 | 11016 | else |
dda83cd7 | 11017 | return arg1; |
4c4b4cd2 PH |
11018 | |
11019 | case UNOP_ABS: | |
fe1fe7ea | 11020 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
4c4b4cd2 | 11021 | if (noside == EVAL_SKIP) |
dda83cd7 | 11022 | goto nosideret; |
f44316fa | 11023 | unop_promote (exp->language_defn, exp->gdbarch, &arg1); |
df407dfe | 11024 | if (value_less (arg1, value_zero (value_type (arg1), not_lval))) |
dda83cd7 | 11025 | return value_neg (arg1); |
14f9c5c9 | 11026 | else |
dda83cd7 | 11027 | return arg1; |
14f9c5c9 AS |
11028 | |
11029 | case UNOP_IND: | |
5ec18f2b | 11030 | preeval_pos = *pos; |
fe1fe7ea | 11031 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
14f9c5c9 | 11032 | if (noside == EVAL_SKIP) |
dda83cd7 | 11033 | goto nosideret; |
df407dfe | 11034 | type = ada_check_typedef (value_type (arg1)); |
14f9c5c9 | 11035 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
dda83cd7 SM |
11036 | { |
11037 | if (ada_is_array_descriptor_type (type)) | |
11038 | /* GDB allows dereferencing GNAT array descriptors. */ | |
11039 | { | |
11040 | struct type *arrType = ada_type_of_array (arg1, 0); | |
11041 | ||
11042 | if (arrType == NULL) | |
11043 | error (_("Attempt to dereference null array pointer.")); | |
11044 | return value_at_lazy (arrType, 0); | |
11045 | } | |
11046 | else if (type->code () == TYPE_CODE_PTR | |
11047 | || type->code () == TYPE_CODE_REF | |
11048 | /* In C you can dereference an array to get the 1st elt. */ | |
11049 | || type->code () == TYPE_CODE_ARRAY) | |
11050 | { | |
11051 | /* As mentioned in the OP_VAR_VALUE case, tagged types can | |
11052 | only be determined by inspecting the object's tag. | |
11053 | This means that we need to evaluate completely the | |
11054 | expression in order to get its type. */ | |
5ec18f2b | 11055 | |
78134374 SM |
11056 | if ((type->code () == TYPE_CODE_REF |
11057 | || type->code () == TYPE_CODE_PTR) | |
5ec18f2b JG |
11058 | && ada_is_tagged_type (TYPE_TARGET_TYPE (type), 0)) |
11059 | { | |
fe1fe7ea SM |
11060 | arg1 |
11061 | = evaluate_subexp (nullptr, exp, &preeval_pos, EVAL_NORMAL); | |
5ec18f2b JG |
11062 | type = value_type (ada_value_ind (arg1)); |
11063 | } | |
11064 | else | |
11065 | { | |
11066 | type = to_static_fixed_type | |
11067 | (ada_aligned_type | |
11068 | (ada_check_typedef (TYPE_TARGET_TYPE (type)))); | |
11069 | } | |
c1b5a1a6 | 11070 | ada_ensure_varsize_limit (type); |
dda83cd7 SM |
11071 | return value_zero (type, lval_memory); |
11072 | } | |
11073 | else if (type->code () == TYPE_CODE_INT) | |
6b0d7253 JB |
11074 | { |
11075 | /* GDB allows dereferencing an int. */ | |
11076 | if (expect_type == NULL) | |
11077 | return value_zero (builtin_type (exp->gdbarch)->builtin_int, | |
11078 | lval_memory); | |
11079 | else | |
11080 | { | |
11081 | expect_type = | |
11082 | to_static_fixed_type (ada_aligned_type (expect_type)); | |
11083 | return value_zero (expect_type, lval_memory); | |
11084 | } | |
11085 | } | |
dda83cd7 SM |
11086 | else |
11087 | error (_("Attempt to take contents of a non-pointer value.")); | |
11088 | } | |
0963b4bd | 11089 | arg1 = ada_coerce_ref (arg1); /* FIXME: What is this for?? */ |
df407dfe | 11090 | type = ada_check_typedef (value_type (arg1)); |
d2e4a39e | 11091 | |
78134374 | 11092 | if (type->code () == TYPE_CODE_INT) |
dda83cd7 SM |
11093 | /* GDB allows dereferencing an int. If we were given |
11094 | the expect_type, then use that as the target type. | |
11095 | Otherwise, assume that the target type is an int. */ | |
11096 | { | |
11097 | if (expect_type != NULL) | |
96967637 JB |
11098 | return ada_value_ind (value_cast (lookup_pointer_type (expect_type), |
11099 | arg1)); | |
11100 | else | |
11101 | return value_at_lazy (builtin_type (exp->gdbarch)->builtin_int, | |
11102 | (CORE_ADDR) value_as_address (arg1)); | |
dda83cd7 | 11103 | } |
6b0d7253 | 11104 | |
4c4b4cd2 | 11105 | if (ada_is_array_descriptor_type (type)) |
dda83cd7 SM |
11106 | /* GDB allows dereferencing GNAT array descriptors. */ |
11107 | return ada_coerce_to_simple_array (arg1); | |
14f9c5c9 | 11108 | else |
dda83cd7 | 11109 | return ada_value_ind (arg1); |
14f9c5c9 AS |
11110 | |
11111 | case STRUCTOP_STRUCT: | |
11112 | tem = longest_to_int (exp->elts[pc + 1].longconst); | |
11113 | (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1); | |
5ec18f2b | 11114 | preeval_pos = *pos; |
fe1fe7ea | 11115 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
14f9c5c9 | 11116 | if (noside == EVAL_SKIP) |
dda83cd7 | 11117 | goto nosideret; |
14f9c5c9 | 11118 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
dda83cd7 SM |
11119 | { |
11120 | struct type *type1 = value_type (arg1); | |
5b4ee69b | 11121 | |
dda83cd7 SM |
11122 | if (ada_is_tagged_type (type1, 1)) |
11123 | { | |
11124 | type = ada_lookup_struct_elt_type (type1, | |
11125 | &exp->elts[pc + 2].string, | |
11126 | 1, 1); | |
5ec18f2b JG |
11127 | |
11128 | /* If the field is not found, check if it exists in the | |
11129 | extension of this object's type. This means that we | |
11130 | need to evaluate completely the expression. */ | |
11131 | ||
dda83cd7 | 11132 | if (type == NULL) |
5ec18f2b | 11133 | { |
fe1fe7ea SM |
11134 | arg1 |
11135 | = evaluate_subexp (nullptr, exp, &preeval_pos, EVAL_NORMAL); | |
5ec18f2b JG |
11136 | arg1 = ada_value_struct_elt (arg1, |
11137 | &exp->elts[pc + 2].string, | |
11138 | 0); | |
11139 | arg1 = unwrap_value (arg1); | |
11140 | type = value_type (ada_to_fixed_value (arg1)); | |
11141 | } | |
dda83cd7 SM |
11142 | } |
11143 | else | |
11144 | type = | |
11145 | ada_lookup_struct_elt_type (type1, &exp->elts[pc + 2].string, 1, | |
11146 | 0); | |
11147 | ||
11148 | return value_zero (ada_aligned_type (type), lval_memory); | |
11149 | } | |
14f9c5c9 | 11150 | else |
a579cd9a MW |
11151 | { |
11152 | arg1 = ada_value_struct_elt (arg1, &exp->elts[pc + 2].string, 0); | |
11153 | arg1 = unwrap_value (arg1); | |
11154 | return ada_to_fixed_value (arg1); | |
11155 | } | |
284614f0 | 11156 | |
14f9c5c9 | 11157 | case OP_TYPE: |
4c4b4cd2 | 11158 | /* The value is not supposed to be used. This is here to make it |
dda83cd7 | 11159 | easier to accommodate expressions that contain types. */ |
14f9c5c9 AS |
11160 | (*pos) += 2; |
11161 | if (noside == EVAL_SKIP) | |
dda83cd7 | 11162 | goto nosideret; |
14f9c5c9 | 11163 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) |
dda83cd7 | 11164 | return allocate_value (exp->elts[pc + 1].type); |
14f9c5c9 | 11165 | else |
dda83cd7 | 11166 | error (_("Attempt to use a type name as an expression")); |
52ce6436 PH |
11167 | |
11168 | case OP_AGGREGATE: | |
11169 | case OP_CHOICES: | |
11170 | case OP_OTHERS: | |
11171 | case OP_DISCRETE_RANGE: | |
11172 | case OP_POSITIONAL: | |
11173 | case OP_NAME: | |
11174 | if (noside == EVAL_NORMAL) | |
11175 | switch (op) | |
11176 | { | |
11177 | case OP_NAME: | |
11178 | error (_("Undefined name, ambiguous name, or renaming used in " | |
e1d5a0d2 | 11179 | "component association: %s."), &exp->elts[pc+2].string); |
52ce6436 PH |
11180 | case OP_AGGREGATE: |
11181 | error (_("Aggregates only allowed on the right of an assignment")); | |
11182 | default: | |
0963b4bd MS |
11183 | internal_error (__FILE__, __LINE__, |
11184 | _("aggregate apparently mangled")); | |
52ce6436 PH |
11185 | } |
11186 | ||
11187 | ada_forward_operator_length (exp, pc, &oplen, &nargs); | |
11188 | *pos += oplen - 1; | |
11189 | for (tem = 0; tem < nargs; tem += 1) | |
11190 | ada_evaluate_subexp (NULL, exp, pos, noside); | |
11191 | goto nosideret; | |
14f9c5c9 AS |
11192 | } |
11193 | ||
11194 | nosideret: | |
ced9779b | 11195 | return eval_skip_value (exp); |
14f9c5c9 | 11196 | } |
14f9c5c9 | 11197 | \f |
d2e4a39e | 11198 | |
dda83cd7 | 11199 | /* Fixed point */ |
14f9c5c9 AS |
11200 | |
11201 | /* If TYPE encodes an Ada fixed-point type, return the suffix of the | |
11202 | type name that encodes the 'small and 'delta information. | |
4c4b4cd2 | 11203 | Otherwise, return NULL. */ |
14f9c5c9 | 11204 | |
d2e4a39e | 11205 | static const char * |
60bd1d53 | 11206 | gnat_encoded_fixed_point_type_info (struct type *type) |
14f9c5c9 | 11207 | { |
d2e4a39e | 11208 | const char *name = ada_type_name (type); |
78134374 | 11209 | enum type_code code = (type == NULL) ? TYPE_CODE_UNDEF : type->code (); |
14f9c5c9 | 11210 | |
d2e4a39e AS |
11211 | if ((code == TYPE_CODE_INT || code == TYPE_CODE_RANGE) && name != NULL) |
11212 | { | |
14f9c5c9 | 11213 | const char *tail = strstr (name, "___XF_"); |
5b4ee69b | 11214 | |
14f9c5c9 | 11215 | if (tail == NULL) |
dda83cd7 | 11216 | return NULL; |
d2e4a39e | 11217 | else |
dda83cd7 | 11218 | return tail + 5; |
14f9c5c9 AS |
11219 | } |
11220 | else if (code == TYPE_CODE_RANGE && TYPE_TARGET_TYPE (type) != type) | |
60bd1d53 | 11221 | return gnat_encoded_fixed_point_type_info (TYPE_TARGET_TYPE (type)); |
14f9c5c9 AS |
11222 | else |
11223 | return NULL; | |
11224 | } | |
11225 | ||
4c4b4cd2 | 11226 | /* Returns non-zero iff TYPE represents an Ada fixed-point type. */ |
14f9c5c9 AS |
11227 | |
11228 | int | |
b2188a06 | 11229 | ada_is_gnat_encoded_fixed_point_type (struct type *type) |
14f9c5c9 | 11230 | { |
60bd1d53 | 11231 | return gnat_encoded_fixed_point_type_info (type) != NULL; |
14f9c5c9 AS |
11232 | } |
11233 | ||
4c4b4cd2 PH |
11234 | /* Return non-zero iff TYPE represents a System.Address type. */ |
11235 | ||
11236 | int | |
11237 | ada_is_system_address_type (struct type *type) | |
11238 | { | |
7d93a1e0 | 11239 | return (type->name () && strcmp (type->name (), "system__address") == 0); |
4c4b4cd2 PH |
11240 | } |
11241 | ||
14f9c5c9 | 11242 | /* Assuming that TYPE is the representation of an Ada fixed-point |
50eff16b UW |
11243 | type, return the target floating-point type to be used to represent |
11244 | of this type during internal computation. */ | |
11245 | ||
11246 | static struct type * | |
11247 | ada_scaling_type (struct type *type) | |
11248 | { | |
11249 | return builtin_type (get_type_arch (type))->builtin_long_double; | |
11250 | } | |
11251 | ||
11252 | /* Assuming that TYPE is the representation of an Ada fixed-point | |
11253 | type, return its delta, or NULL if the type is malformed and the | |
4c4b4cd2 | 11254 | delta cannot be determined. */ |
14f9c5c9 | 11255 | |
50eff16b | 11256 | struct value * |
b2188a06 | 11257 | gnat_encoded_fixed_point_delta (struct type *type) |
14f9c5c9 | 11258 | { |
60bd1d53 | 11259 | const char *encoding = gnat_encoded_fixed_point_type_info (type); |
50eff16b UW |
11260 | struct type *scale_type = ada_scaling_type (type); |
11261 | ||
11262 | long long num, den; | |
11263 | ||
11264 | if (sscanf (encoding, "_%lld_%lld", &num, &den) < 2) | |
11265 | return nullptr; | |
d2e4a39e | 11266 | else |
50eff16b UW |
11267 | return value_binop (value_from_longest (scale_type, num), |
11268 | value_from_longest (scale_type, den), BINOP_DIV); | |
14f9c5c9 AS |
11269 | } |
11270 | ||
b2188a06 JB |
11271 | /* Assuming that ada_is_gnat_encoded_fixed_point_type (TYPE), return |
11272 | the scaling factor ('SMALL value) associated with the type. */ | |
14f9c5c9 | 11273 | |
50eff16b | 11274 | struct value * |
75f24e86 | 11275 | gnat_encoded_fixed_point_scaling_factor (struct type *type) |
14f9c5c9 | 11276 | { |
60bd1d53 | 11277 | const char *encoding = gnat_encoded_fixed_point_type_info (type); |
50eff16b UW |
11278 | struct type *scale_type = ada_scaling_type (type); |
11279 | ||
11280 | long long num0, den0, num1, den1; | |
14f9c5c9 | 11281 | int n; |
d2e4a39e | 11282 | |
50eff16b | 11283 | n = sscanf (encoding, "_%lld_%lld_%lld_%lld", |
facc390f | 11284 | &num0, &den0, &num1, &den1); |
14f9c5c9 AS |
11285 | |
11286 | if (n < 2) | |
50eff16b | 11287 | return value_from_longest (scale_type, 1); |
14f9c5c9 | 11288 | else if (n == 4) |
50eff16b UW |
11289 | return value_binop (value_from_longest (scale_type, num1), |
11290 | value_from_longest (scale_type, den1), BINOP_DIV); | |
d2e4a39e | 11291 | else |
50eff16b UW |
11292 | return value_binop (value_from_longest (scale_type, num0), |
11293 | value_from_longest (scale_type, den0), BINOP_DIV); | |
14f9c5c9 AS |
11294 | } |
11295 | ||
14f9c5c9 | 11296 | \f |
d2e4a39e | 11297 | |
dda83cd7 | 11298 | /* Range types */ |
14f9c5c9 AS |
11299 | |
11300 | /* Scan STR beginning at position K for a discriminant name, and | |
11301 | return the value of that discriminant field of DVAL in *PX. If | |
11302 | PNEW_K is not null, put the position of the character beyond the | |
11303 | name scanned in *PNEW_K. Return 1 if successful; return 0 and do | |
4c4b4cd2 | 11304 | not alter *PX and *PNEW_K if unsuccessful. */ |
14f9c5c9 AS |
11305 | |
11306 | static int | |
108d56a4 | 11307 | scan_discrim_bound (const char *str, int k, struct value *dval, LONGEST * px, |
dda83cd7 | 11308 | int *pnew_k) |
14f9c5c9 AS |
11309 | { |
11310 | static char *bound_buffer = NULL; | |
11311 | static size_t bound_buffer_len = 0; | |
5da1a4d3 | 11312 | const char *pstart, *pend, *bound; |
d2e4a39e | 11313 | struct value *bound_val; |
14f9c5c9 AS |
11314 | |
11315 | if (dval == NULL || str == NULL || str[k] == '\0') | |
11316 | return 0; | |
11317 | ||
5da1a4d3 SM |
11318 | pstart = str + k; |
11319 | pend = strstr (pstart, "__"); | |
14f9c5c9 AS |
11320 | if (pend == NULL) |
11321 | { | |
5da1a4d3 | 11322 | bound = pstart; |
14f9c5c9 AS |
11323 | k += strlen (bound); |
11324 | } | |
d2e4a39e | 11325 | else |
14f9c5c9 | 11326 | { |
5da1a4d3 SM |
11327 | int len = pend - pstart; |
11328 | ||
11329 | /* Strip __ and beyond. */ | |
11330 | GROW_VECT (bound_buffer, bound_buffer_len, len + 1); | |
11331 | strncpy (bound_buffer, pstart, len); | |
11332 | bound_buffer[len] = '\0'; | |
11333 | ||
14f9c5c9 | 11334 | bound = bound_buffer; |
d2e4a39e | 11335 | k = pend - str; |
14f9c5c9 | 11336 | } |
d2e4a39e | 11337 | |
df407dfe | 11338 | bound_val = ada_search_struct_field (bound, dval, 0, value_type (dval)); |
14f9c5c9 AS |
11339 | if (bound_val == NULL) |
11340 | return 0; | |
11341 | ||
11342 | *px = value_as_long (bound_val); | |
11343 | if (pnew_k != NULL) | |
11344 | *pnew_k = k; | |
11345 | return 1; | |
11346 | } | |
11347 | ||
11348 | /* Value of variable named NAME in the current environment. If | |
11349 | no such variable found, then if ERR_MSG is null, returns 0, and | |
4c4b4cd2 PH |
11350 | otherwise causes an error with message ERR_MSG. */ |
11351 | ||
d2e4a39e | 11352 | static struct value * |
edb0c9cb | 11353 | get_var_value (const char *name, const char *err_msg) |
14f9c5c9 | 11354 | { |
b5ec771e | 11355 | lookup_name_info lookup_name (name, symbol_name_match_type::FULL); |
14f9c5c9 | 11356 | |
54d343a2 | 11357 | std::vector<struct block_symbol> syms; |
b5ec771e PA |
11358 | int nsyms = ada_lookup_symbol_list_worker (lookup_name, |
11359 | get_selected_block (0), | |
11360 | VAR_DOMAIN, &syms, 1); | |
14f9c5c9 AS |
11361 | |
11362 | if (nsyms != 1) | |
11363 | { | |
11364 | if (err_msg == NULL) | |
dda83cd7 | 11365 | return 0; |
14f9c5c9 | 11366 | else |
dda83cd7 | 11367 | error (("%s"), err_msg); |
14f9c5c9 AS |
11368 | } |
11369 | ||
54d343a2 | 11370 | return value_of_variable (syms[0].symbol, syms[0].block); |
14f9c5c9 | 11371 | } |
d2e4a39e | 11372 | |
edb0c9cb PA |
11373 | /* Value of integer variable named NAME in the current environment. |
11374 | If no such variable is found, returns false. Otherwise, sets VALUE | |
11375 | to the variable's value and returns true. */ | |
4c4b4cd2 | 11376 | |
edb0c9cb PA |
11377 | bool |
11378 | get_int_var_value (const char *name, LONGEST &value) | |
14f9c5c9 | 11379 | { |
4c4b4cd2 | 11380 | struct value *var_val = get_var_value (name, 0); |
d2e4a39e | 11381 | |
14f9c5c9 | 11382 | if (var_val == 0) |
edb0c9cb PA |
11383 | return false; |
11384 | ||
11385 | value = value_as_long (var_val); | |
11386 | return true; | |
14f9c5c9 | 11387 | } |
d2e4a39e | 11388 | |
14f9c5c9 AS |
11389 | |
11390 | /* Return a range type whose base type is that of the range type named | |
11391 | NAME in the current environment, and whose bounds are calculated | |
4c4b4cd2 | 11392 | from NAME according to the GNAT range encoding conventions. |
1ce677a4 UW |
11393 | Extract discriminant values, if needed, from DVAL. ORIG_TYPE is the |
11394 | corresponding range type from debug information; fall back to using it | |
11395 | if symbol lookup fails. If a new type must be created, allocate it | |
11396 | like ORIG_TYPE was. The bounds information, in general, is encoded | |
11397 | in NAME, the base type given in the named range type. */ | |
14f9c5c9 | 11398 | |
d2e4a39e | 11399 | static struct type * |
28c85d6c | 11400 | to_fixed_range_type (struct type *raw_type, struct value *dval) |
14f9c5c9 | 11401 | { |
0d5cff50 | 11402 | const char *name; |
14f9c5c9 | 11403 | struct type *base_type; |
108d56a4 | 11404 | const char *subtype_info; |
14f9c5c9 | 11405 | |
28c85d6c | 11406 | gdb_assert (raw_type != NULL); |
7d93a1e0 | 11407 | gdb_assert (raw_type->name () != NULL); |
dddfab26 | 11408 | |
78134374 | 11409 | if (raw_type->code () == TYPE_CODE_RANGE) |
14f9c5c9 AS |
11410 | base_type = TYPE_TARGET_TYPE (raw_type); |
11411 | else | |
11412 | base_type = raw_type; | |
11413 | ||
7d93a1e0 | 11414 | name = raw_type->name (); |
14f9c5c9 AS |
11415 | subtype_info = strstr (name, "___XD"); |
11416 | if (subtype_info == NULL) | |
690cc4eb | 11417 | { |
43bbcdc2 PH |
11418 | LONGEST L = ada_discrete_type_low_bound (raw_type); |
11419 | LONGEST U = ada_discrete_type_high_bound (raw_type); | |
5b4ee69b | 11420 | |
690cc4eb PH |
11421 | if (L < INT_MIN || U > INT_MAX) |
11422 | return raw_type; | |
11423 | else | |
0c9c3474 SA |
11424 | return create_static_range_type (alloc_type_copy (raw_type), raw_type, |
11425 | L, U); | |
690cc4eb | 11426 | } |
14f9c5c9 AS |
11427 | else |
11428 | { | |
11429 | static char *name_buf = NULL; | |
11430 | static size_t name_len = 0; | |
11431 | int prefix_len = subtype_info - name; | |
11432 | LONGEST L, U; | |
11433 | struct type *type; | |
108d56a4 | 11434 | const char *bounds_str; |
14f9c5c9 AS |
11435 | int n; |
11436 | ||
11437 | GROW_VECT (name_buf, name_len, prefix_len + 5); | |
11438 | strncpy (name_buf, name, prefix_len); | |
11439 | name_buf[prefix_len] = '\0'; | |
11440 | ||
11441 | subtype_info += 5; | |
11442 | bounds_str = strchr (subtype_info, '_'); | |
11443 | n = 1; | |
11444 | ||
d2e4a39e | 11445 | if (*subtype_info == 'L') |
dda83cd7 SM |
11446 | { |
11447 | if (!ada_scan_number (bounds_str, n, &L, &n) | |
11448 | && !scan_discrim_bound (bounds_str, n, dval, &L, &n)) | |
11449 | return raw_type; | |
11450 | if (bounds_str[n] == '_') | |
11451 | n += 2; | |
11452 | else if (bounds_str[n] == '.') /* FIXME? SGI Workshop kludge. */ | |
11453 | n += 1; | |
11454 | subtype_info += 1; | |
11455 | } | |
d2e4a39e | 11456 | else |
dda83cd7 SM |
11457 | { |
11458 | strcpy (name_buf + prefix_len, "___L"); | |
11459 | if (!get_int_var_value (name_buf, L)) | |
11460 | { | |
11461 | lim_warning (_("Unknown lower bound, using 1.")); | |
11462 | L = 1; | |
11463 | } | |
11464 | } | |
14f9c5c9 | 11465 | |
d2e4a39e | 11466 | if (*subtype_info == 'U') |
dda83cd7 SM |
11467 | { |
11468 | if (!ada_scan_number (bounds_str, n, &U, &n) | |
11469 | && !scan_discrim_bound (bounds_str, n, dval, &U, &n)) | |
11470 | return raw_type; | |
11471 | } | |
d2e4a39e | 11472 | else |
dda83cd7 SM |
11473 | { |
11474 | strcpy (name_buf + prefix_len, "___U"); | |
11475 | if (!get_int_var_value (name_buf, U)) | |
11476 | { | |
11477 | lim_warning (_("Unknown upper bound, using %ld."), (long) L); | |
11478 | U = L; | |
11479 | } | |
11480 | } | |
14f9c5c9 | 11481 | |
0c9c3474 SA |
11482 | type = create_static_range_type (alloc_type_copy (raw_type), |
11483 | base_type, L, U); | |
f5a91472 | 11484 | /* create_static_range_type alters the resulting type's length |
dda83cd7 SM |
11485 | to match the size of the base_type, which is not what we want. |
11486 | Set it back to the original range type's length. */ | |
f5a91472 | 11487 | TYPE_LENGTH (type) = TYPE_LENGTH (raw_type); |
d0e39ea2 | 11488 | type->set_name (name); |
14f9c5c9 AS |
11489 | return type; |
11490 | } | |
11491 | } | |
11492 | ||
4c4b4cd2 PH |
11493 | /* True iff NAME is the name of a range type. */ |
11494 | ||
14f9c5c9 | 11495 | int |
d2e4a39e | 11496 | ada_is_range_type_name (const char *name) |
14f9c5c9 AS |
11497 | { |
11498 | return (name != NULL && strstr (name, "___XD")); | |
d2e4a39e | 11499 | } |
14f9c5c9 | 11500 | \f |
d2e4a39e | 11501 | |
dda83cd7 | 11502 | /* Modular types */ |
4c4b4cd2 PH |
11503 | |
11504 | /* True iff TYPE is an Ada modular type. */ | |
14f9c5c9 | 11505 | |
14f9c5c9 | 11506 | int |
d2e4a39e | 11507 | ada_is_modular_type (struct type *type) |
14f9c5c9 | 11508 | { |
18af8284 | 11509 | struct type *subranged_type = get_base_type (type); |
14f9c5c9 | 11510 | |
78134374 | 11511 | return (subranged_type != NULL && type->code () == TYPE_CODE_RANGE |
dda83cd7 SM |
11512 | && subranged_type->code () == TYPE_CODE_INT |
11513 | && subranged_type->is_unsigned ()); | |
14f9c5c9 AS |
11514 | } |
11515 | ||
4c4b4cd2 PH |
11516 | /* Assuming ada_is_modular_type (TYPE), the modulus of TYPE. */ |
11517 | ||
61ee279c | 11518 | ULONGEST |
0056e4d5 | 11519 | ada_modulus (struct type *type) |
14f9c5c9 | 11520 | { |
5e500d33 SM |
11521 | const dynamic_prop &high = type->bounds ()->high; |
11522 | ||
11523 | if (high.kind () == PROP_CONST) | |
11524 | return (ULONGEST) high.const_val () + 1; | |
11525 | ||
11526 | /* If TYPE is unresolved, the high bound might be a location list. Return | |
11527 | 0, for lack of a better value to return. */ | |
11528 | return 0; | |
14f9c5c9 | 11529 | } |
d2e4a39e | 11530 | \f |
f7f9143b JB |
11531 | |
11532 | /* Ada exception catchpoint support: | |
11533 | --------------------------------- | |
11534 | ||
11535 | We support 3 kinds of exception catchpoints: | |
11536 | . catchpoints on Ada exceptions | |
11537 | . catchpoints on unhandled Ada exceptions | |
11538 | . catchpoints on failed assertions | |
11539 | ||
11540 | Exceptions raised during failed assertions, or unhandled exceptions | |
11541 | could perfectly be caught with the general catchpoint on Ada exceptions. | |
11542 | However, we can easily differentiate these two special cases, and having | |
11543 | the option to distinguish these two cases from the rest can be useful | |
11544 | to zero-in on certain situations. | |
11545 | ||
11546 | Exception catchpoints are a specialized form of breakpoint, | |
11547 | since they rely on inserting breakpoints inside known routines | |
11548 | of the GNAT runtime. The implementation therefore uses a standard | |
11549 | breakpoint structure of the BP_BREAKPOINT type, but with its own set | |
11550 | of breakpoint_ops. | |
11551 | ||
0259addd JB |
11552 | Support in the runtime for exception catchpoints have been changed |
11553 | a few times already, and these changes affect the implementation | |
11554 | of these catchpoints. In order to be able to support several | |
11555 | variants of the runtime, we use a sniffer that will determine | |
28010a5d | 11556 | the runtime variant used by the program being debugged. */ |
f7f9143b | 11557 | |
82eacd52 JB |
11558 | /* Ada's standard exceptions. |
11559 | ||
11560 | The Ada 83 standard also defined Numeric_Error. But there so many | |
11561 | situations where it was unclear from the Ada 83 Reference Manual | |
11562 | (RM) whether Constraint_Error or Numeric_Error should be raised, | |
11563 | that the ARG (Ada Rapporteur Group) eventually issued a Binding | |
11564 | Interpretation saying that anytime the RM says that Numeric_Error | |
11565 | should be raised, the implementation may raise Constraint_Error. | |
11566 | Ada 95 went one step further and pretty much removed Numeric_Error | |
11567 | from the list of standard exceptions (it made it a renaming of | |
11568 | Constraint_Error, to help preserve compatibility when compiling | |
11569 | an Ada83 compiler). As such, we do not include Numeric_Error from | |
11570 | this list of standard exceptions. */ | |
3d0b0fa3 | 11571 | |
27087b7f | 11572 | static const char * const standard_exc[] = { |
3d0b0fa3 JB |
11573 | "constraint_error", |
11574 | "program_error", | |
11575 | "storage_error", | |
11576 | "tasking_error" | |
11577 | }; | |
11578 | ||
0259addd JB |
11579 | typedef CORE_ADDR (ada_unhandled_exception_name_addr_ftype) (void); |
11580 | ||
11581 | /* A structure that describes how to support exception catchpoints | |
11582 | for a given executable. */ | |
11583 | ||
11584 | struct exception_support_info | |
11585 | { | |
11586 | /* The name of the symbol to break on in order to insert | |
11587 | a catchpoint on exceptions. */ | |
11588 | const char *catch_exception_sym; | |
11589 | ||
11590 | /* The name of the symbol to break on in order to insert | |
11591 | a catchpoint on unhandled exceptions. */ | |
11592 | const char *catch_exception_unhandled_sym; | |
11593 | ||
11594 | /* The name of the symbol to break on in order to insert | |
11595 | a catchpoint on failed assertions. */ | |
11596 | const char *catch_assert_sym; | |
11597 | ||
9f757bf7 XR |
11598 | /* The name of the symbol to break on in order to insert |
11599 | a catchpoint on exception handling. */ | |
11600 | const char *catch_handlers_sym; | |
11601 | ||
0259addd JB |
11602 | /* Assuming that the inferior just triggered an unhandled exception |
11603 | catchpoint, this function is responsible for returning the address | |
11604 | in inferior memory where the name of that exception is stored. | |
11605 | Return zero if the address could not be computed. */ | |
11606 | ada_unhandled_exception_name_addr_ftype *unhandled_exception_name_addr; | |
11607 | }; | |
11608 | ||
11609 | static CORE_ADDR ada_unhandled_exception_name_addr (void); | |
11610 | static CORE_ADDR ada_unhandled_exception_name_addr_from_raise (void); | |
11611 | ||
11612 | /* The following exception support info structure describes how to | |
11613 | implement exception catchpoints with the latest version of the | |
ca683e3a | 11614 | Ada runtime (as of 2019-08-??). */ |
0259addd JB |
11615 | |
11616 | static const struct exception_support_info default_exception_support_info = | |
ca683e3a AO |
11617 | { |
11618 | "__gnat_debug_raise_exception", /* catch_exception_sym */ | |
11619 | "__gnat_unhandled_exception", /* catch_exception_unhandled_sym */ | |
11620 | "__gnat_debug_raise_assert_failure", /* catch_assert_sym */ | |
11621 | "__gnat_begin_handler_v1", /* catch_handlers_sym */ | |
11622 | ada_unhandled_exception_name_addr | |
11623 | }; | |
11624 | ||
11625 | /* The following exception support info structure describes how to | |
11626 | implement exception catchpoints with an earlier version of the | |
11627 | Ada runtime (as of 2007-03-06) using v0 of the EH ABI. */ | |
11628 | ||
11629 | static const struct exception_support_info exception_support_info_v0 = | |
0259addd JB |
11630 | { |
11631 | "__gnat_debug_raise_exception", /* catch_exception_sym */ | |
11632 | "__gnat_unhandled_exception", /* catch_exception_unhandled_sym */ | |
11633 | "__gnat_debug_raise_assert_failure", /* catch_assert_sym */ | |
9f757bf7 | 11634 | "__gnat_begin_handler", /* catch_handlers_sym */ |
0259addd JB |
11635 | ada_unhandled_exception_name_addr |
11636 | }; | |
11637 | ||
11638 | /* The following exception support info structure describes how to | |
11639 | implement exception catchpoints with a slightly older version | |
11640 | of the Ada runtime. */ | |
11641 | ||
11642 | static const struct exception_support_info exception_support_info_fallback = | |
11643 | { | |
11644 | "__gnat_raise_nodefer_with_msg", /* catch_exception_sym */ | |
11645 | "__gnat_unhandled_exception", /* catch_exception_unhandled_sym */ | |
11646 | "system__assertions__raise_assert_failure", /* catch_assert_sym */ | |
9f757bf7 | 11647 | "__gnat_begin_handler", /* catch_handlers_sym */ |
0259addd JB |
11648 | ada_unhandled_exception_name_addr_from_raise |
11649 | }; | |
11650 | ||
f17011e0 JB |
11651 | /* Return nonzero if we can detect the exception support routines |
11652 | described in EINFO. | |
11653 | ||
11654 | This function errors out if an abnormal situation is detected | |
11655 | (for instance, if we find the exception support routines, but | |
11656 | that support is found to be incomplete). */ | |
11657 | ||
11658 | static int | |
11659 | ada_has_this_exception_support (const struct exception_support_info *einfo) | |
11660 | { | |
11661 | struct symbol *sym; | |
11662 | ||
11663 | /* The symbol we're looking up is provided by a unit in the GNAT runtime | |
11664 | that should be compiled with debugging information. As a result, we | |
11665 | expect to find that symbol in the symtabs. */ | |
11666 | ||
11667 | sym = standard_lookup (einfo->catch_exception_sym, NULL, VAR_DOMAIN); | |
11668 | if (sym == NULL) | |
a6af7abe JB |
11669 | { |
11670 | /* Perhaps we did not find our symbol because the Ada runtime was | |
11671 | compiled without debugging info, or simply stripped of it. | |
11672 | It happens on some GNU/Linux distributions for instance, where | |
11673 | users have to install a separate debug package in order to get | |
11674 | the runtime's debugging info. In that situation, let the user | |
11675 | know why we cannot insert an Ada exception catchpoint. | |
11676 | ||
11677 | Note: Just for the purpose of inserting our Ada exception | |
11678 | catchpoint, we could rely purely on the associated minimal symbol. | |
11679 | But we would be operating in degraded mode anyway, since we are | |
11680 | still lacking the debugging info needed later on to extract | |
11681 | the name of the exception being raised (this name is printed in | |
11682 | the catchpoint message, and is also used when trying to catch | |
11683 | a specific exception). We do not handle this case for now. */ | |
3b7344d5 | 11684 | struct bound_minimal_symbol msym |
1c8e84b0 JB |
11685 | = lookup_minimal_symbol (einfo->catch_exception_sym, NULL, NULL); |
11686 | ||
3b7344d5 | 11687 | if (msym.minsym && MSYMBOL_TYPE (msym.minsym) != mst_solib_trampoline) |
a6af7abe JB |
11688 | error (_("Your Ada runtime appears to be missing some debugging " |
11689 | "information.\nCannot insert Ada exception catchpoint " | |
11690 | "in this configuration.")); | |
11691 | ||
11692 | return 0; | |
11693 | } | |
f17011e0 JB |
11694 | |
11695 | /* Make sure that the symbol we found corresponds to a function. */ | |
11696 | ||
11697 | if (SYMBOL_CLASS (sym) != LOC_BLOCK) | |
ca683e3a AO |
11698 | { |
11699 | error (_("Symbol \"%s\" is not a function (class = %d)"), | |
987012b8 | 11700 | sym->linkage_name (), SYMBOL_CLASS (sym)); |
ca683e3a AO |
11701 | return 0; |
11702 | } | |
11703 | ||
11704 | sym = standard_lookup (einfo->catch_handlers_sym, NULL, VAR_DOMAIN); | |
11705 | if (sym == NULL) | |
11706 | { | |
11707 | struct bound_minimal_symbol msym | |
11708 | = lookup_minimal_symbol (einfo->catch_handlers_sym, NULL, NULL); | |
11709 | ||
11710 | if (msym.minsym && MSYMBOL_TYPE (msym.minsym) != mst_solib_trampoline) | |
11711 | error (_("Your Ada runtime appears to be missing some debugging " | |
11712 | "information.\nCannot insert Ada exception catchpoint " | |
11713 | "in this configuration.")); | |
11714 | ||
11715 | return 0; | |
11716 | } | |
11717 | ||
11718 | /* Make sure that the symbol we found corresponds to a function. */ | |
11719 | ||
11720 | if (SYMBOL_CLASS (sym) != LOC_BLOCK) | |
11721 | { | |
11722 | error (_("Symbol \"%s\" is not a function (class = %d)"), | |
987012b8 | 11723 | sym->linkage_name (), SYMBOL_CLASS (sym)); |
ca683e3a AO |
11724 | return 0; |
11725 | } | |
f17011e0 JB |
11726 | |
11727 | return 1; | |
11728 | } | |
11729 | ||
0259addd JB |
11730 | /* Inspect the Ada runtime and determine which exception info structure |
11731 | should be used to provide support for exception catchpoints. | |
11732 | ||
3eecfa55 JB |
11733 | This function will always set the per-inferior exception_info, |
11734 | or raise an error. */ | |
0259addd JB |
11735 | |
11736 | static void | |
11737 | ada_exception_support_info_sniffer (void) | |
11738 | { | |
3eecfa55 | 11739 | struct ada_inferior_data *data = get_ada_inferior_data (current_inferior ()); |
0259addd JB |
11740 | |
11741 | /* If the exception info is already known, then no need to recompute it. */ | |
3eecfa55 | 11742 | if (data->exception_info != NULL) |
0259addd JB |
11743 | return; |
11744 | ||
11745 | /* Check the latest (default) exception support info. */ | |
f17011e0 | 11746 | if (ada_has_this_exception_support (&default_exception_support_info)) |
0259addd | 11747 | { |
3eecfa55 | 11748 | data->exception_info = &default_exception_support_info; |
0259addd JB |
11749 | return; |
11750 | } | |
11751 | ||
ca683e3a AO |
11752 | /* Try the v0 exception suport info. */ |
11753 | if (ada_has_this_exception_support (&exception_support_info_v0)) | |
11754 | { | |
11755 | data->exception_info = &exception_support_info_v0; | |
11756 | return; | |
11757 | } | |
11758 | ||
0259addd | 11759 | /* Try our fallback exception suport info. */ |
f17011e0 | 11760 | if (ada_has_this_exception_support (&exception_support_info_fallback)) |
0259addd | 11761 | { |
3eecfa55 | 11762 | data->exception_info = &exception_support_info_fallback; |
0259addd JB |
11763 | return; |
11764 | } | |
11765 | ||
11766 | /* Sometimes, it is normal for us to not be able to find the routine | |
11767 | we are looking for. This happens when the program is linked with | |
11768 | the shared version of the GNAT runtime, and the program has not been | |
11769 | started yet. Inform the user of these two possible causes if | |
11770 | applicable. */ | |
11771 | ||
ccefe4c4 | 11772 | if (ada_update_initial_language (language_unknown) != language_ada) |
0259addd JB |
11773 | error (_("Unable to insert catchpoint. Is this an Ada main program?")); |
11774 | ||
11775 | /* If the symbol does not exist, then check that the program is | |
11776 | already started, to make sure that shared libraries have been | |
11777 | loaded. If it is not started, this may mean that the symbol is | |
11778 | in a shared library. */ | |
11779 | ||
e99b03dc | 11780 | if (inferior_ptid.pid () == 0) |
0259addd JB |
11781 | error (_("Unable to insert catchpoint. Try to start the program first.")); |
11782 | ||
11783 | /* At this point, we know that we are debugging an Ada program and | |
11784 | that the inferior has been started, but we still are not able to | |
0963b4bd | 11785 | find the run-time symbols. That can mean that we are in |
0259addd JB |
11786 | configurable run time mode, or that a-except as been optimized |
11787 | out by the linker... In any case, at this point it is not worth | |
11788 | supporting this feature. */ | |
11789 | ||
7dda8cff | 11790 | error (_("Cannot insert Ada exception catchpoints in this configuration.")); |
0259addd JB |
11791 | } |
11792 | ||
f7f9143b JB |
11793 | /* True iff FRAME is very likely to be that of a function that is |
11794 | part of the runtime system. This is all very heuristic, but is | |
11795 | intended to be used as advice as to what frames are uninteresting | |
11796 | to most users. */ | |
11797 | ||
11798 | static int | |
11799 | is_known_support_routine (struct frame_info *frame) | |
11800 | { | |
692465f1 | 11801 | enum language func_lang; |
f7f9143b | 11802 | int i; |
f35a17b5 | 11803 | const char *fullname; |
f7f9143b | 11804 | |
4ed6b5be JB |
11805 | /* If this code does not have any debugging information (no symtab), |
11806 | This cannot be any user code. */ | |
f7f9143b | 11807 | |
51abb421 | 11808 | symtab_and_line sal = find_frame_sal (frame); |
f7f9143b JB |
11809 | if (sal.symtab == NULL) |
11810 | return 1; | |
11811 | ||
4ed6b5be JB |
11812 | /* If there is a symtab, but the associated source file cannot be |
11813 | located, then assume this is not user code: Selecting a frame | |
11814 | for which we cannot display the code would not be very helpful | |
11815 | for the user. This should also take care of case such as VxWorks | |
11816 | where the kernel has some debugging info provided for a few units. */ | |
f7f9143b | 11817 | |
f35a17b5 JK |
11818 | fullname = symtab_to_fullname (sal.symtab); |
11819 | if (access (fullname, R_OK) != 0) | |
f7f9143b JB |
11820 | return 1; |
11821 | ||
85102364 | 11822 | /* Check the unit filename against the Ada runtime file naming. |
4ed6b5be JB |
11823 | We also check the name of the objfile against the name of some |
11824 | known system libraries that sometimes come with debugging info | |
11825 | too. */ | |
11826 | ||
f7f9143b JB |
11827 | for (i = 0; known_runtime_file_name_patterns[i] != NULL; i += 1) |
11828 | { | |
11829 | re_comp (known_runtime_file_name_patterns[i]); | |
f69c91ad | 11830 | if (re_exec (lbasename (sal.symtab->filename))) |
dda83cd7 | 11831 | return 1; |
eb822aa6 | 11832 | if (SYMTAB_OBJFILE (sal.symtab) != NULL |
dda83cd7 SM |
11833 | && re_exec (objfile_name (SYMTAB_OBJFILE (sal.symtab)))) |
11834 | return 1; | |
f7f9143b JB |
11835 | } |
11836 | ||
4ed6b5be | 11837 | /* Check whether the function is a GNAT-generated entity. */ |
f7f9143b | 11838 | |
c6dc63a1 TT |
11839 | gdb::unique_xmalloc_ptr<char> func_name |
11840 | = find_frame_funname (frame, &func_lang, NULL); | |
f7f9143b JB |
11841 | if (func_name == NULL) |
11842 | return 1; | |
11843 | ||
11844 | for (i = 0; known_auxiliary_function_name_patterns[i] != NULL; i += 1) | |
11845 | { | |
11846 | re_comp (known_auxiliary_function_name_patterns[i]); | |
c6dc63a1 TT |
11847 | if (re_exec (func_name.get ())) |
11848 | return 1; | |
f7f9143b JB |
11849 | } |
11850 | ||
11851 | return 0; | |
11852 | } | |
11853 | ||
11854 | /* Find the first frame that contains debugging information and that is not | |
11855 | part of the Ada run-time, starting from FI and moving upward. */ | |
11856 | ||
0ef643c8 | 11857 | void |
f7f9143b JB |
11858 | ada_find_printable_frame (struct frame_info *fi) |
11859 | { | |
11860 | for (; fi != NULL; fi = get_prev_frame (fi)) | |
11861 | { | |
11862 | if (!is_known_support_routine (fi)) | |
dda83cd7 SM |
11863 | { |
11864 | select_frame (fi); | |
11865 | break; | |
11866 | } | |
f7f9143b JB |
11867 | } |
11868 | ||
11869 | } | |
11870 | ||
11871 | /* Assuming that the inferior just triggered an unhandled exception | |
11872 | catchpoint, return the address in inferior memory where the name | |
11873 | of the exception is stored. | |
11874 | ||
11875 | Return zero if the address could not be computed. */ | |
11876 | ||
11877 | static CORE_ADDR | |
11878 | ada_unhandled_exception_name_addr (void) | |
0259addd JB |
11879 | { |
11880 | return parse_and_eval_address ("e.full_name"); | |
11881 | } | |
11882 | ||
11883 | /* Same as ada_unhandled_exception_name_addr, except that this function | |
11884 | should be used when the inferior uses an older version of the runtime, | |
11885 | where the exception name needs to be extracted from a specific frame | |
11886 | several frames up in the callstack. */ | |
11887 | ||
11888 | static CORE_ADDR | |
11889 | ada_unhandled_exception_name_addr_from_raise (void) | |
f7f9143b JB |
11890 | { |
11891 | int frame_level; | |
11892 | struct frame_info *fi; | |
3eecfa55 | 11893 | struct ada_inferior_data *data = get_ada_inferior_data (current_inferior ()); |
f7f9143b JB |
11894 | |
11895 | /* To determine the name of this exception, we need to select | |
11896 | the frame corresponding to RAISE_SYM_NAME. This frame is | |
11897 | at least 3 levels up, so we simply skip the first 3 frames | |
11898 | without checking the name of their associated function. */ | |
11899 | fi = get_current_frame (); | |
11900 | for (frame_level = 0; frame_level < 3; frame_level += 1) | |
11901 | if (fi != NULL) | |
11902 | fi = get_prev_frame (fi); | |
11903 | ||
11904 | while (fi != NULL) | |
11905 | { | |
692465f1 JB |
11906 | enum language func_lang; |
11907 | ||
c6dc63a1 TT |
11908 | gdb::unique_xmalloc_ptr<char> func_name |
11909 | = find_frame_funname (fi, &func_lang, NULL); | |
55b87a52 KS |
11910 | if (func_name != NULL) |
11911 | { | |
dda83cd7 | 11912 | if (strcmp (func_name.get (), |
55b87a52 KS |
11913 | data->exception_info->catch_exception_sym) == 0) |
11914 | break; /* We found the frame we were looking for... */ | |
55b87a52 | 11915 | } |
fb44b1a7 | 11916 | fi = get_prev_frame (fi); |
f7f9143b JB |
11917 | } |
11918 | ||
11919 | if (fi == NULL) | |
11920 | return 0; | |
11921 | ||
11922 | select_frame (fi); | |
11923 | return parse_and_eval_address ("id.full_name"); | |
11924 | } | |
11925 | ||
11926 | /* Assuming the inferior just triggered an Ada exception catchpoint | |
11927 | (of any type), return the address in inferior memory where the name | |
11928 | of the exception is stored, if applicable. | |
11929 | ||
45db7c09 PA |
11930 | Assumes the selected frame is the current frame. |
11931 | ||
f7f9143b JB |
11932 | Return zero if the address could not be computed, or if not relevant. */ |
11933 | ||
11934 | static CORE_ADDR | |
761269c8 | 11935 | ada_exception_name_addr_1 (enum ada_exception_catchpoint_kind ex, |
dda83cd7 | 11936 | struct breakpoint *b) |
f7f9143b | 11937 | { |
3eecfa55 JB |
11938 | struct ada_inferior_data *data = get_ada_inferior_data (current_inferior ()); |
11939 | ||
f7f9143b JB |
11940 | switch (ex) |
11941 | { | |
761269c8 | 11942 | case ada_catch_exception: |
dda83cd7 SM |
11943 | return (parse_and_eval_address ("e.full_name")); |
11944 | break; | |
f7f9143b | 11945 | |
761269c8 | 11946 | case ada_catch_exception_unhandled: |
dda83cd7 SM |
11947 | return data->exception_info->unhandled_exception_name_addr (); |
11948 | break; | |
9f757bf7 XR |
11949 | |
11950 | case ada_catch_handlers: | |
dda83cd7 | 11951 | return 0; /* The runtimes does not provide access to the exception |
9f757bf7 | 11952 | name. */ |
dda83cd7 | 11953 | break; |
9f757bf7 | 11954 | |
761269c8 | 11955 | case ada_catch_assert: |
dda83cd7 SM |
11956 | return 0; /* Exception name is not relevant in this case. */ |
11957 | break; | |
f7f9143b JB |
11958 | |
11959 | default: | |
dda83cd7 SM |
11960 | internal_error (__FILE__, __LINE__, _("unexpected catchpoint type")); |
11961 | break; | |
f7f9143b JB |
11962 | } |
11963 | ||
11964 | return 0; /* Should never be reached. */ | |
11965 | } | |
11966 | ||
e547c119 JB |
11967 | /* Assuming the inferior is stopped at an exception catchpoint, |
11968 | return the message which was associated to the exception, if | |
11969 | available. Return NULL if the message could not be retrieved. | |
11970 | ||
e547c119 JB |
11971 | Note: The exception message can be associated to an exception |
11972 | either through the use of the Raise_Exception function, or | |
11973 | more simply (Ada 2005 and later), via: | |
11974 | ||
11975 | raise Exception_Name with "exception message"; | |
11976 | ||
11977 | */ | |
11978 | ||
6f46ac85 | 11979 | static gdb::unique_xmalloc_ptr<char> |
e547c119 JB |
11980 | ada_exception_message_1 (void) |
11981 | { | |
11982 | struct value *e_msg_val; | |
e547c119 | 11983 | int e_msg_len; |
e547c119 JB |
11984 | |
11985 | /* For runtimes that support this feature, the exception message | |
11986 | is passed as an unbounded string argument called "message". */ | |
11987 | e_msg_val = parse_and_eval ("message"); | |
11988 | if (e_msg_val == NULL) | |
11989 | return NULL; /* Exception message not supported. */ | |
11990 | ||
11991 | e_msg_val = ada_coerce_to_simple_array (e_msg_val); | |
11992 | gdb_assert (e_msg_val != NULL); | |
11993 | e_msg_len = TYPE_LENGTH (value_type (e_msg_val)); | |
11994 | ||
11995 | /* If the message string is empty, then treat it as if there was | |
11996 | no exception message. */ | |
11997 | if (e_msg_len <= 0) | |
11998 | return NULL; | |
11999 | ||
15f3b077 TT |
12000 | gdb::unique_xmalloc_ptr<char> e_msg ((char *) xmalloc (e_msg_len + 1)); |
12001 | read_memory (value_address (e_msg_val), (gdb_byte *) e_msg.get (), | |
12002 | e_msg_len); | |
12003 | e_msg.get ()[e_msg_len] = '\0'; | |
12004 | ||
12005 | return e_msg; | |
e547c119 JB |
12006 | } |
12007 | ||
12008 | /* Same as ada_exception_message_1, except that all exceptions are | |
12009 | contained here (returning NULL instead). */ | |
12010 | ||
6f46ac85 | 12011 | static gdb::unique_xmalloc_ptr<char> |
e547c119 JB |
12012 | ada_exception_message (void) |
12013 | { | |
6f46ac85 | 12014 | gdb::unique_xmalloc_ptr<char> e_msg; |
e547c119 | 12015 | |
a70b8144 | 12016 | try |
e547c119 JB |
12017 | { |
12018 | e_msg = ada_exception_message_1 (); | |
12019 | } | |
230d2906 | 12020 | catch (const gdb_exception_error &e) |
e547c119 | 12021 | { |
6f46ac85 | 12022 | e_msg.reset (nullptr); |
e547c119 | 12023 | } |
e547c119 JB |
12024 | |
12025 | return e_msg; | |
12026 | } | |
12027 | ||
f7f9143b JB |
12028 | /* Same as ada_exception_name_addr_1, except that it intercepts and contains |
12029 | any error that ada_exception_name_addr_1 might cause to be thrown. | |
12030 | When an error is intercepted, a warning with the error message is printed, | |
12031 | and zero is returned. */ | |
12032 | ||
12033 | static CORE_ADDR | |
761269c8 | 12034 | ada_exception_name_addr (enum ada_exception_catchpoint_kind ex, |
dda83cd7 | 12035 | struct breakpoint *b) |
f7f9143b | 12036 | { |
f7f9143b JB |
12037 | CORE_ADDR result = 0; |
12038 | ||
a70b8144 | 12039 | try |
f7f9143b JB |
12040 | { |
12041 | result = ada_exception_name_addr_1 (ex, b); | |
12042 | } | |
12043 | ||
230d2906 | 12044 | catch (const gdb_exception_error &e) |
f7f9143b | 12045 | { |
3d6e9d23 | 12046 | warning (_("failed to get exception name: %s"), e.what ()); |
f7f9143b JB |
12047 | return 0; |
12048 | } | |
12049 | ||
12050 | return result; | |
12051 | } | |
12052 | ||
cb7de75e | 12053 | static std::string ada_exception_catchpoint_cond_string |
9f757bf7 XR |
12054 | (const char *excep_string, |
12055 | enum ada_exception_catchpoint_kind ex); | |
28010a5d PA |
12056 | |
12057 | /* Ada catchpoints. | |
12058 | ||
12059 | In the case of catchpoints on Ada exceptions, the catchpoint will | |
12060 | stop the target on every exception the program throws. When a user | |
12061 | specifies the name of a specific exception, we translate this | |
12062 | request into a condition expression (in text form), and then parse | |
12063 | it into an expression stored in each of the catchpoint's locations. | |
12064 | We then use this condition to check whether the exception that was | |
12065 | raised is the one the user is interested in. If not, then the | |
12066 | target is resumed again. We store the name of the requested | |
12067 | exception, in order to be able to re-set the condition expression | |
12068 | when symbols change. */ | |
12069 | ||
12070 | /* An instance of this type is used to represent an Ada catchpoint | |
5625a286 | 12071 | breakpoint location. */ |
28010a5d | 12072 | |
5625a286 | 12073 | class ada_catchpoint_location : public bp_location |
28010a5d | 12074 | { |
5625a286 | 12075 | public: |
5f486660 | 12076 | ada_catchpoint_location (breakpoint *owner) |
f06f1252 | 12077 | : bp_location (owner, bp_loc_software_breakpoint) |
5625a286 | 12078 | {} |
28010a5d PA |
12079 | |
12080 | /* The condition that checks whether the exception that was raised | |
12081 | is the specific exception the user specified on catchpoint | |
12082 | creation. */ | |
4d01a485 | 12083 | expression_up excep_cond_expr; |
28010a5d PA |
12084 | }; |
12085 | ||
c1fc2657 | 12086 | /* An instance of this type is used to represent an Ada catchpoint. */ |
28010a5d | 12087 | |
c1fc2657 | 12088 | struct ada_catchpoint : public breakpoint |
28010a5d | 12089 | { |
37f6a7f4 TT |
12090 | explicit ada_catchpoint (enum ada_exception_catchpoint_kind kind) |
12091 | : m_kind (kind) | |
12092 | { | |
12093 | } | |
12094 | ||
28010a5d | 12095 | /* The name of the specific exception the user specified. */ |
bc18fbb5 | 12096 | std::string excep_string; |
37f6a7f4 TT |
12097 | |
12098 | /* What kind of catchpoint this is. */ | |
12099 | enum ada_exception_catchpoint_kind m_kind; | |
28010a5d PA |
12100 | }; |
12101 | ||
12102 | /* Parse the exception condition string in the context of each of the | |
12103 | catchpoint's locations, and store them for later evaluation. */ | |
12104 | ||
12105 | static void | |
9f757bf7 | 12106 | create_excep_cond_exprs (struct ada_catchpoint *c, |
dda83cd7 | 12107 | enum ada_exception_catchpoint_kind ex) |
28010a5d | 12108 | { |
fccf9de1 TT |
12109 | struct bp_location *bl; |
12110 | ||
28010a5d | 12111 | /* Nothing to do if there's no specific exception to catch. */ |
bc18fbb5 | 12112 | if (c->excep_string.empty ()) |
28010a5d PA |
12113 | return; |
12114 | ||
12115 | /* Same if there are no locations... */ | |
c1fc2657 | 12116 | if (c->loc == NULL) |
28010a5d PA |
12117 | return; |
12118 | ||
fccf9de1 TT |
12119 | /* Compute the condition expression in text form, from the specific |
12120 | expection we want to catch. */ | |
12121 | std::string cond_string | |
12122 | = ada_exception_catchpoint_cond_string (c->excep_string.c_str (), ex); | |
28010a5d | 12123 | |
fccf9de1 TT |
12124 | /* Iterate over all the catchpoint's locations, and parse an |
12125 | expression for each. */ | |
12126 | for (bl = c->loc; bl != NULL; bl = bl->next) | |
28010a5d PA |
12127 | { |
12128 | struct ada_catchpoint_location *ada_loc | |
fccf9de1 | 12129 | = (struct ada_catchpoint_location *) bl; |
4d01a485 | 12130 | expression_up exp; |
28010a5d | 12131 | |
fccf9de1 | 12132 | if (!bl->shlib_disabled) |
28010a5d | 12133 | { |
bbc13ae3 | 12134 | const char *s; |
28010a5d | 12135 | |
cb7de75e | 12136 | s = cond_string.c_str (); |
a70b8144 | 12137 | try |
28010a5d | 12138 | { |
fccf9de1 TT |
12139 | exp = parse_exp_1 (&s, bl->address, |
12140 | block_for_pc (bl->address), | |
036e657b | 12141 | 0); |
28010a5d | 12142 | } |
230d2906 | 12143 | catch (const gdb_exception_error &e) |
849f2b52 JB |
12144 | { |
12145 | warning (_("failed to reevaluate internal exception condition " | |
12146 | "for catchpoint %d: %s"), | |
3d6e9d23 | 12147 | c->number, e.what ()); |
849f2b52 | 12148 | } |
28010a5d PA |
12149 | } |
12150 | ||
b22e99fd | 12151 | ada_loc->excep_cond_expr = std::move (exp); |
28010a5d | 12152 | } |
28010a5d PA |
12153 | } |
12154 | ||
28010a5d PA |
12155 | /* Implement the ALLOCATE_LOCATION method in the breakpoint_ops |
12156 | structure for all exception catchpoint kinds. */ | |
12157 | ||
12158 | static struct bp_location * | |
37f6a7f4 | 12159 | allocate_location_exception (struct breakpoint *self) |
28010a5d | 12160 | { |
5f486660 | 12161 | return new ada_catchpoint_location (self); |
28010a5d PA |
12162 | } |
12163 | ||
12164 | /* Implement the RE_SET method in the breakpoint_ops structure for all | |
12165 | exception catchpoint kinds. */ | |
12166 | ||
12167 | static void | |
37f6a7f4 | 12168 | re_set_exception (struct breakpoint *b) |
28010a5d PA |
12169 | { |
12170 | struct ada_catchpoint *c = (struct ada_catchpoint *) b; | |
12171 | ||
12172 | /* Call the base class's method. This updates the catchpoint's | |
12173 | locations. */ | |
2060206e | 12174 | bkpt_breakpoint_ops.re_set (b); |
28010a5d PA |
12175 | |
12176 | /* Reparse the exception conditional expressions. One for each | |
12177 | location. */ | |
37f6a7f4 | 12178 | create_excep_cond_exprs (c, c->m_kind); |
28010a5d PA |
12179 | } |
12180 | ||
12181 | /* Returns true if we should stop for this breakpoint hit. If the | |
12182 | user specified a specific exception, we only want to cause a stop | |
12183 | if the program thrown that exception. */ | |
12184 | ||
12185 | static int | |
12186 | should_stop_exception (const struct bp_location *bl) | |
12187 | { | |
12188 | struct ada_catchpoint *c = (struct ada_catchpoint *) bl->owner; | |
12189 | const struct ada_catchpoint_location *ada_loc | |
12190 | = (const struct ada_catchpoint_location *) bl; | |
28010a5d PA |
12191 | int stop; |
12192 | ||
37f6a7f4 TT |
12193 | struct internalvar *var = lookup_internalvar ("_ada_exception"); |
12194 | if (c->m_kind == ada_catch_assert) | |
12195 | clear_internalvar (var); | |
12196 | else | |
12197 | { | |
12198 | try | |
12199 | { | |
12200 | const char *expr; | |
12201 | ||
12202 | if (c->m_kind == ada_catch_handlers) | |
12203 | expr = ("GNAT_GCC_exception_Access(gcc_exception)" | |
12204 | ".all.occurrence.id"); | |
12205 | else | |
12206 | expr = "e"; | |
12207 | ||
12208 | struct value *exc = parse_and_eval (expr); | |
12209 | set_internalvar (var, exc); | |
12210 | } | |
12211 | catch (const gdb_exception_error &ex) | |
12212 | { | |
12213 | clear_internalvar (var); | |
12214 | } | |
12215 | } | |
12216 | ||
28010a5d | 12217 | /* With no specific exception, should always stop. */ |
bc18fbb5 | 12218 | if (c->excep_string.empty ()) |
28010a5d PA |
12219 | return 1; |
12220 | ||
12221 | if (ada_loc->excep_cond_expr == NULL) | |
12222 | { | |
12223 | /* We will have a NULL expression if back when we were creating | |
12224 | the expressions, this location's had failed to parse. */ | |
12225 | return 1; | |
12226 | } | |
12227 | ||
12228 | stop = 1; | |
a70b8144 | 12229 | try |
28010a5d PA |
12230 | { |
12231 | struct value *mark; | |
12232 | ||
12233 | mark = value_mark (); | |
4d01a485 | 12234 | stop = value_true (evaluate_expression (ada_loc->excep_cond_expr.get ())); |
28010a5d PA |
12235 | value_free_to_mark (mark); |
12236 | } | |
230d2906 | 12237 | catch (const gdb_exception &ex) |
492d29ea PA |
12238 | { |
12239 | exception_fprintf (gdb_stderr, ex, | |
12240 | _("Error in testing exception condition:\n")); | |
12241 | } | |
492d29ea | 12242 | |
28010a5d PA |
12243 | return stop; |
12244 | } | |
12245 | ||
12246 | /* Implement the CHECK_STATUS method in the breakpoint_ops structure | |
12247 | for all exception catchpoint kinds. */ | |
12248 | ||
12249 | static void | |
37f6a7f4 | 12250 | check_status_exception (bpstat bs) |
28010a5d PA |
12251 | { |
12252 | bs->stop = should_stop_exception (bs->bp_location_at); | |
12253 | } | |
12254 | ||
f7f9143b JB |
12255 | /* Implement the PRINT_IT method in the breakpoint_ops structure |
12256 | for all exception catchpoint kinds. */ | |
12257 | ||
12258 | static enum print_stop_action | |
37f6a7f4 | 12259 | print_it_exception (bpstat bs) |
f7f9143b | 12260 | { |
79a45e25 | 12261 | struct ui_out *uiout = current_uiout; |
348d480f PA |
12262 | struct breakpoint *b = bs->breakpoint_at; |
12263 | ||
956a9fb9 | 12264 | annotate_catchpoint (b->number); |
f7f9143b | 12265 | |
112e8700 | 12266 | if (uiout->is_mi_like_p ()) |
f7f9143b | 12267 | { |
112e8700 | 12268 | uiout->field_string ("reason", |
956a9fb9 | 12269 | async_reason_lookup (EXEC_ASYNC_BREAKPOINT_HIT)); |
112e8700 | 12270 | uiout->field_string ("disp", bpdisp_text (b->disposition)); |
f7f9143b JB |
12271 | } |
12272 | ||
112e8700 SM |
12273 | uiout->text (b->disposition == disp_del |
12274 | ? "\nTemporary catchpoint " : "\nCatchpoint "); | |
381befee | 12275 | uiout->field_signed ("bkptno", b->number); |
112e8700 | 12276 | uiout->text (", "); |
f7f9143b | 12277 | |
45db7c09 PA |
12278 | /* ada_exception_name_addr relies on the selected frame being the |
12279 | current frame. Need to do this here because this function may be | |
12280 | called more than once when printing a stop, and below, we'll | |
12281 | select the first frame past the Ada run-time (see | |
12282 | ada_find_printable_frame). */ | |
12283 | select_frame (get_current_frame ()); | |
12284 | ||
37f6a7f4 TT |
12285 | struct ada_catchpoint *c = (struct ada_catchpoint *) b; |
12286 | switch (c->m_kind) | |
f7f9143b | 12287 | { |
761269c8 JB |
12288 | case ada_catch_exception: |
12289 | case ada_catch_exception_unhandled: | |
9f757bf7 | 12290 | case ada_catch_handlers: |
956a9fb9 | 12291 | { |
37f6a7f4 | 12292 | const CORE_ADDR addr = ada_exception_name_addr (c->m_kind, b); |
956a9fb9 JB |
12293 | char exception_name[256]; |
12294 | ||
12295 | if (addr != 0) | |
12296 | { | |
c714b426 PA |
12297 | read_memory (addr, (gdb_byte *) exception_name, |
12298 | sizeof (exception_name) - 1); | |
956a9fb9 JB |
12299 | exception_name [sizeof (exception_name) - 1] = '\0'; |
12300 | } | |
12301 | else | |
12302 | { | |
12303 | /* For some reason, we were unable to read the exception | |
12304 | name. This could happen if the Runtime was compiled | |
12305 | without debugging info, for instance. In that case, | |
12306 | just replace the exception name by the generic string | |
12307 | "exception" - it will read as "an exception" in the | |
12308 | notification we are about to print. */ | |
967cff16 | 12309 | memcpy (exception_name, "exception", sizeof ("exception")); |
956a9fb9 JB |
12310 | } |
12311 | /* In the case of unhandled exception breakpoints, we print | |
12312 | the exception name as "unhandled EXCEPTION_NAME", to make | |
12313 | it clearer to the user which kind of catchpoint just got | |
12314 | hit. We used ui_out_text to make sure that this extra | |
12315 | info does not pollute the exception name in the MI case. */ | |
37f6a7f4 | 12316 | if (c->m_kind == ada_catch_exception_unhandled) |
112e8700 SM |
12317 | uiout->text ("unhandled "); |
12318 | uiout->field_string ("exception-name", exception_name); | |
956a9fb9 JB |
12319 | } |
12320 | break; | |
761269c8 | 12321 | case ada_catch_assert: |
956a9fb9 JB |
12322 | /* In this case, the name of the exception is not really |
12323 | important. Just print "failed assertion" to make it clearer | |
12324 | that his program just hit an assertion-failure catchpoint. | |
12325 | We used ui_out_text because this info does not belong in | |
12326 | the MI output. */ | |
112e8700 | 12327 | uiout->text ("failed assertion"); |
956a9fb9 | 12328 | break; |
f7f9143b | 12329 | } |
e547c119 | 12330 | |
6f46ac85 | 12331 | gdb::unique_xmalloc_ptr<char> exception_message = ada_exception_message (); |
e547c119 JB |
12332 | if (exception_message != NULL) |
12333 | { | |
e547c119 | 12334 | uiout->text (" ("); |
6f46ac85 | 12335 | uiout->field_string ("exception-message", exception_message.get ()); |
e547c119 | 12336 | uiout->text (")"); |
e547c119 JB |
12337 | } |
12338 | ||
112e8700 | 12339 | uiout->text (" at "); |
956a9fb9 | 12340 | ada_find_printable_frame (get_current_frame ()); |
f7f9143b JB |
12341 | |
12342 | return PRINT_SRC_AND_LOC; | |
12343 | } | |
12344 | ||
12345 | /* Implement the PRINT_ONE method in the breakpoint_ops structure | |
12346 | for all exception catchpoint kinds. */ | |
12347 | ||
12348 | static void | |
37f6a7f4 | 12349 | print_one_exception (struct breakpoint *b, struct bp_location **last_loc) |
f7f9143b | 12350 | { |
79a45e25 | 12351 | struct ui_out *uiout = current_uiout; |
28010a5d | 12352 | struct ada_catchpoint *c = (struct ada_catchpoint *) b; |
79a45b7d TT |
12353 | struct value_print_options opts; |
12354 | ||
12355 | get_user_print_options (&opts); | |
f06f1252 | 12356 | |
79a45b7d | 12357 | if (opts.addressprint) |
f06f1252 | 12358 | uiout->field_skip ("addr"); |
f7f9143b JB |
12359 | |
12360 | annotate_field (5); | |
37f6a7f4 | 12361 | switch (c->m_kind) |
f7f9143b | 12362 | { |
761269c8 | 12363 | case ada_catch_exception: |
dda83cd7 SM |
12364 | if (!c->excep_string.empty ()) |
12365 | { | |
bc18fbb5 TT |
12366 | std::string msg = string_printf (_("`%s' Ada exception"), |
12367 | c->excep_string.c_str ()); | |
28010a5d | 12368 | |
dda83cd7 SM |
12369 | uiout->field_string ("what", msg); |
12370 | } | |
12371 | else | |
12372 | uiout->field_string ("what", "all Ada exceptions"); | |
12373 | ||
12374 | break; | |
f7f9143b | 12375 | |
761269c8 | 12376 | case ada_catch_exception_unhandled: |
dda83cd7 SM |
12377 | uiout->field_string ("what", "unhandled Ada exceptions"); |
12378 | break; | |
f7f9143b | 12379 | |
9f757bf7 | 12380 | case ada_catch_handlers: |
dda83cd7 SM |
12381 | if (!c->excep_string.empty ()) |
12382 | { | |
9f757bf7 XR |
12383 | uiout->field_fmt ("what", |
12384 | _("`%s' Ada exception handlers"), | |
bc18fbb5 | 12385 | c->excep_string.c_str ()); |
dda83cd7 SM |
12386 | } |
12387 | else | |
9f757bf7 | 12388 | uiout->field_string ("what", "all Ada exceptions handlers"); |
dda83cd7 | 12389 | break; |
9f757bf7 | 12390 | |
761269c8 | 12391 | case ada_catch_assert: |
dda83cd7 SM |
12392 | uiout->field_string ("what", "failed Ada assertions"); |
12393 | break; | |
f7f9143b JB |
12394 | |
12395 | default: | |
dda83cd7 SM |
12396 | internal_error (__FILE__, __LINE__, _("unexpected catchpoint type")); |
12397 | break; | |
f7f9143b JB |
12398 | } |
12399 | } | |
12400 | ||
12401 | /* Implement the PRINT_MENTION method in the breakpoint_ops structure | |
12402 | for all exception catchpoint kinds. */ | |
12403 | ||
12404 | static void | |
37f6a7f4 | 12405 | print_mention_exception (struct breakpoint *b) |
f7f9143b | 12406 | { |
28010a5d | 12407 | struct ada_catchpoint *c = (struct ada_catchpoint *) b; |
79a45e25 | 12408 | struct ui_out *uiout = current_uiout; |
28010a5d | 12409 | |
112e8700 | 12410 | uiout->text (b->disposition == disp_del ? _("Temporary catchpoint ") |
dda83cd7 | 12411 | : _("Catchpoint ")); |
381befee | 12412 | uiout->field_signed ("bkptno", b->number); |
112e8700 | 12413 | uiout->text (": "); |
00eb2c4a | 12414 | |
37f6a7f4 | 12415 | switch (c->m_kind) |
f7f9143b | 12416 | { |
761269c8 | 12417 | case ada_catch_exception: |
dda83cd7 | 12418 | if (!c->excep_string.empty ()) |
00eb2c4a | 12419 | { |
862d101a | 12420 | std::string info = string_printf (_("`%s' Ada exception"), |
bc18fbb5 | 12421 | c->excep_string.c_str ()); |
862d101a | 12422 | uiout->text (info.c_str ()); |
00eb2c4a | 12423 | } |
dda83cd7 SM |
12424 | else |
12425 | uiout->text (_("all Ada exceptions")); | |
12426 | break; | |
f7f9143b | 12427 | |
761269c8 | 12428 | case ada_catch_exception_unhandled: |
dda83cd7 SM |
12429 | uiout->text (_("unhandled Ada exceptions")); |
12430 | break; | |
9f757bf7 XR |
12431 | |
12432 | case ada_catch_handlers: | |
dda83cd7 | 12433 | if (!c->excep_string.empty ()) |
9f757bf7 XR |
12434 | { |
12435 | std::string info | |
12436 | = string_printf (_("`%s' Ada exception handlers"), | |
bc18fbb5 | 12437 | c->excep_string.c_str ()); |
9f757bf7 XR |
12438 | uiout->text (info.c_str ()); |
12439 | } | |
dda83cd7 SM |
12440 | else |
12441 | uiout->text (_("all Ada exceptions handlers")); | |
12442 | break; | |
9f757bf7 | 12443 | |
761269c8 | 12444 | case ada_catch_assert: |
dda83cd7 SM |
12445 | uiout->text (_("failed Ada assertions")); |
12446 | break; | |
f7f9143b JB |
12447 | |
12448 | default: | |
dda83cd7 SM |
12449 | internal_error (__FILE__, __LINE__, _("unexpected catchpoint type")); |
12450 | break; | |
f7f9143b JB |
12451 | } |
12452 | } | |
12453 | ||
6149aea9 PA |
12454 | /* Implement the PRINT_RECREATE method in the breakpoint_ops structure |
12455 | for all exception catchpoint kinds. */ | |
12456 | ||
12457 | static void | |
37f6a7f4 | 12458 | print_recreate_exception (struct breakpoint *b, struct ui_file *fp) |
6149aea9 | 12459 | { |
28010a5d PA |
12460 | struct ada_catchpoint *c = (struct ada_catchpoint *) b; |
12461 | ||
37f6a7f4 | 12462 | switch (c->m_kind) |
6149aea9 | 12463 | { |
761269c8 | 12464 | case ada_catch_exception: |
6149aea9 | 12465 | fprintf_filtered (fp, "catch exception"); |
bc18fbb5 TT |
12466 | if (!c->excep_string.empty ()) |
12467 | fprintf_filtered (fp, " %s", c->excep_string.c_str ()); | |
6149aea9 PA |
12468 | break; |
12469 | ||
761269c8 | 12470 | case ada_catch_exception_unhandled: |
78076abc | 12471 | fprintf_filtered (fp, "catch exception unhandled"); |
6149aea9 PA |
12472 | break; |
12473 | ||
9f757bf7 XR |
12474 | case ada_catch_handlers: |
12475 | fprintf_filtered (fp, "catch handlers"); | |
12476 | break; | |
12477 | ||
761269c8 | 12478 | case ada_catch_assert: |
6149aea9 PA |
12479 | fprintf_filtered (fp, "catch assert"); |
12480 | break; | |
12481 | ||
12482 | default: | |
12483 | internal_error (__FILE__, __LINE__, _("unexpected catchpoint type")); | |
12484 | } | |
d9b3f62e | 12485 | print_recreate_thread (b, fp); |
6149aea9 PA |
12486 | } |
12487 | ||
37f6a7f4 | 12488 | /* Virtual tables for various breakpoint types. */ |
2060206e | 12489 | static struct breakpoint_ops catch_exception_breakpoint_ops; |
2060206e | 12490 | static struct breakpoint_ops catch_exception_unhandled_breakpoint_ops; |
2060206e | 12491 | static struct breakpoint_ops catch_assert_breakpoint_ops; |
9f757bf7 XR |
12492 | static struct breakpoint_ops catch_handlers_breakpoint_ops; |
12493 | ||
f06f1252 TT |
12494 | /* See ada-lang.h. */ |
12495 | ||
12496 | bool | |
12497 | is_ada_exception_catchpoint (breakpoint *bp) | |
12498 | { | |
12499 | return (bp->ops == &catch_exception_breakpoint_ops | |
12500 | || bp->ops == &catch_exception_unhandled_breakpoint_ops | |
12501 | || bp->ops == &catch_assert_breakpoint_ops | |
12502 | || bp->ops == &catch_handlers_breakpoint_ops); | |
12503 | } | |
12504 | ||
f7f9143b JB |
12505 | /* Split the arguments specified in a "catch exception" command. |
12506 | Set EX to the appropriate catchpoint type. | |
28010a5d | 12507 | Set EXCEP_STRING to the name of the specific exception if |
5845583d | 12508 | specified by the user. |
9f757bf7 XR |
12509 | IS_CATCH_HANDLERS_CMD: True if the arguments are for a |
12510 | "catch handlers" command. False otherwise. | |
5845583d JB |
12511 | If a condition is found at the end of the arguments, the condition |
12512 | expression is stored in COND_STRING (memory must be deallocated | |
12513 | after use). Otherwise COND_STRING is set to NULL. */ | |
f7f9143b JB |
12514 | |
12515 | static void | |
a121b7c1 | 12516 | catch_ada_exception_command_split (const char *args, |
9f757bf7 | 12517 | bool is_catch_handlers_cmd, |
dda83cd7 | 12518 | enum ada_exception_catchpoint_kind *ex, |
bc18fbb5 TT |
12519 | std::string *excep_string, |
12520 | std::string *cond_string) | |
f7f9143b | 12521 | { |
bc18fbb5 | 12522 | std::string exception_name; |
f7f9143b | 12523 | |
bc18fbb5 TT |
12524 | exception_name = extract_arg (&args); |
12525 | if (exception_name == "if") | |
5845583d JB |
12526 | { |
12527 | /* This is not an exception name; this is the start of a condition | |
12528 | expression for a catchpoint on all exceptions. So, "un-get" | |
12529 | this token, and set exception_name to NULL. */ | |
bc18fbb5 | 12530 | exception_name.clear (); |
5845583d JB |
12531 | args -= 2; |
12532 | } | |
f7f9143b | 12533 | |
5845583d | 12534 | /* Check to see if we have a condition. */ |
f7f9143b | 12535 | |
f1735a53 | 12536 | args = skip_spaces (args); |
61012eef | 12537 | if (startswith (args, "if") |
5845583d JB |
12538 | && (isspace (args[2]) || args[2] == '\0')) |
12539 | { | |
12540 | args += 2; | |
f1735a53 | 12541 | args = skip_spaces (args); |
5845583d JB |
12542 | |
12543 | if (args[0] == '\0') | |
dda83cd7 | 12544 | error (_("Condition missing after `if' keyword")); |
bc18fbb5 | 12545 | *cond_string = args; |
5845583d JB |
12546 | |
12547 | args += strlen (args); | |
12548 | } | |
12549 | ||
12550 | /* Check that we do not have any more arguments. Anything else | |
12551 | is unexpected. */ | |
f7f9143b JB |
12552 | |
12553 | if (args[0] != '\0') | |
12554 | error (_("Junk at end of expression")); | |
12555 | ||
9f757bf7 XR |
12556 | if (is_catch_handlers_cmd) |
12557 | { | |
12558 | /* Catch handling of exceptions. */ | |
12559 | *ex = ada_catch_handlers; | |
12560 | *excep_string = exception_name; | |
12561 | } | |
bc18fbb5 | 12562 | else if (exception_name.empty ()) |
f7f9143b JB |
12563 | { |
12564 | /* Catch all exceptions. */ | |
761269c8 | 12565 | *ex = ada_catch_exception; |
bc18fbb5 | 12566 | excep_string->clear (); |
f7f9143b | 12567 | } |
bc18fbb5 | 12568 | else if (exception_name == "unhandled") |
f7f9143b JB |
12569 | { |
12570 | /* Catch unhandled exceptions. */ | |
761269c8 | 12571 | *ex = ada_catch_exception_unhandled; |
bc18fbb5 | 12572 | excep_string->clear (); |
f7f9143b JB |
12573 | } |
12574 | else | |
12575 | { | |
12576 | /* Catch a specific exception. */ | |
761269c8 | 12577 | *ex = ada_catch_exception; |
28010a5d | 12578 | *excep_string = exception_name; |
f7f9143b JB |
12579 | } |
12580 | } | |
12581 | ||
12582 | /* Return the name of the symbol on which we should break in order to | |
12583 | implement a catchpoint of the EX kind. */ | |
12584 | ||
12585 | static const char * | |
761269c8 | 12586 | ada_exception_sym_name (enum ada_exception_catchpoint_kind ex) |
f7f9143b | 12587 | { |
3eecfa55 JB |
12588 | struct ada_inferior_data *data = get_ada_inferior_data (current_inferior ()); |
12589 | ||
12590 | gdb_assert (data->exception_info != NULL); | |
0259addd | 12591 | |
f7f9143b JB |
12592 | switch (ex) |
12593 | { | |
761269c8 | 12594 | case ada_catch_exception: |
dda83cd7 SM |
12595 | return (data->exception_info->catch_exception_sym); |
12596 | break; | |
761269c8 | 12597 | case ada_catch_exception_unhandled: |
dda83cd7 SM |
12598 | return (data->exception_info->catch_exception_unhandled_sym); |
12599 | break; | |
761269c8 | 12600 | case ada_catch_assert: |
dda83cd7 SM |
12601 | return (data->exception_info->catch_assert_sym); |
12602 | break; | |
9f757bf7 | 12603 | case ada_catch_handlers: |
dda83cd7 SM |
12604 | return (data->exception_info->catch_handlers_sym); |
12605 | break; | |
f7f9143b | 12606 | default: |
dda83cd7 SM |
12607 | internal_error (__FILE__, __LINE__, |
12608 | _("unexpected catchpoint kind (%d)"), ex); | |
f7f9143b JB |
12609 | } |
12610 | } | |
12611 | ||
12612 | /* Return the breakpoint ops "virtual table" used for catchpoints | |
12613 | of the EX kind. */ | |
12614 | ||
c0a91b2b | 12615 | static const struct breakpoint_ops * |
761269c8 | 12616 | ada_exception_breakpoint_ops (enum ada_exception_catchpoint_kind ex) |
f7f9143b JB |
12617 | { |
12618 | switch (ex) | |
12619 | { | |
761269c8 | 12620 | case ada_catch_exception: |
dda83cd7 SM |
12621 | return (&catch_exception_breakpoint_ops); |
12622 | break; | |
761269c8 | 12623 | case ada_catch_exception_unhandled: |
dda83cd7 SM |
12624 | return (&catch_exception_unhandled_breakpoint_ops); |
12625 | break; | |
761269c8 | 12626 | case ada_catch_assert: |
dda83cd7 SM |
12627 | return (&catch_assert_breakpoint_ops); |
12628 | break; | |
9f757bf7 | 12629 | case ada_catch_handlers: |
dda83cd7 SM |
12630 | return (&catch_handlers_breakpoint_ops); |
12631 | break; | |
f7f9143b | 12632 | default: |
dda83cd7 SM |
12633 | internal_error (__FILE__, __LINE__, |
12634 | _("unexpected catchpoint kind (%d)"), ex); | |
f7f9143b JB |
12635 | } |
12636 | } | |
12637 | ||
12638 | /* Return the condition that will be used to match the current exception | |
12639 | being raised with the exception that the user wants to catch. This | |
12640 | assumes that this condition is used when the inferior just triggered | |
12641 | an exception catchpoint. | |
cb7de75e | 12642 | EX: the type of catchpoints used for catching Ada exceptions. */ |
f7f9143b | 12643 | |
cb7de75e | 12644 | static std::string |
9f757bf7 | 12645 | ada_exception_catchpoint_cond_string (const char *excep_string, |
dda83cd7 | 12646 | enum ada_exception_catchpoint_kind ex) |
f7f9143b | 12647 | { |
3d0b0fa3 | 12648 | int i; |
fccf9de1 | 12649 | bool is_standard_exc = false; |
cb7de75e | 12650 | std::string result; |
9f757bf7 XR |
12651 | |
12652 | if (ex == ada_catch_handlers) | |
12653 | { | |
12654 | /* For exception handlers catchpoints, the condition string does | |
dda83cd7 | 12655 | not use the same parameter as for the other exceptions. */ |
fccf9de1 TT |
12656 | result = ("long_integer (GNAT_GCC_exception_Access" |
12657 | "(gcc_exception).all.occurrence.id)"); | |
9f757bf7 XR |
12658 | } |
12659 | else | |
fccf9de1 | 12660 | result = "long_integer (e)"; |
3d0b0fa3 | 12661 | |
0963b4bd | 12662 | /* The standard exceptions are a special case. They are defined in |
3d0b0fa3 | 12663 | runtime units that have been compiled without debugging info; if |
28010a5d | 12664 | EXCEP_STRING is the not-fully-qualified name of a standard |
3d0b0fa3 JB |
12665 | exception (e.g. "constraint_error") then, during the evaluation |
12666 | of the condition expression, the symbol lookup on this name would | |
0963b4bd | 12667 | *not* return this standard exception. The catchpoint condition |
3d0b0fa3 JB |
12668 | may then be set only on user-defined exceptions which have the |
12669 | same not-fully-qualified name (e.g. my_package.constraint_error). | |
12670 | ||
12671 | To avoid this unexcepted behavior, these standard exceptions are | |
0963b4bd | 12672 | systematically prefixed by "standard". This means that "catch |
3d0b0fa3 JB |
12673 | exception constraint_error" is rewritten into "catch exception |
12674 | standard.constraint_error". | |
12675 | ||
85102364 | 12676 | If an exception named constraint_error is defined in another package of |
3d0b0fa3 JB |
12677 | the inferior program, then the only way to specify this exception as a |
12678 | breakpoint condition is to use its fully-qualified named: | |
fccf9de1 | 12679 | e.g. my_package.constraint_error. */ |
3d0b0fa3 JB |
12680 | |
12681 | for (i = 0; i < sizeof (standard_exc) / sizeof (char *); i++) | |
12682 | { | |
28010a5d | 12683 | if (strcmp (standard_exc [i], excep_string) == 0) |
3d0b0fa3 | 12684 | { |
fccf9de1 | 12685 | is_standard_exc = true; |
9f757bf7 | 12686 | break; |
3d0b0fa3 JB |
12687 | } |
12688 | } | |
9f757bf7 | 12689 | |
fccf9de1 TT |
12690 | result += " = "; |
12691 | ||
12692 | if (is_standard_exc) | |
12693 | string_appendf (result, "long_integer (&standard.%s)", excep_string); | |
12694 | else | |
12695 | string_appendf (result, "long_integer (&%s)", excep_string); | |
9f757bf7 | 12696 | |
9f757bf7 | 12697 | return result; |
f7f9143b JB |
12698 | } |
12699 | ||
12700 | /* Return the symtab_and_line that should be used to insert an exception | |
12701 | catchpoint of the TYPE kind. | |
12702 | ||
28010a5d PA |
12703 | ADDR_STRING returns the name of the function where the real |
12704 | breakpoint that implements the catchpoints is set, depending on the | |
12705 | type of catchpoint we need to create. */ | |
f7f9143b JB |
12706 | |
12707 | static struct symtab_and_line | |
bc18fbb5 | 12708 | ada_exception_sal (enum ada_exception_catchpoint_kind ex, |
cc12f4a8 | 12709 | std::string *addr_string, const struct breakpoint_ops **ops) |
f7f9143b JB |
12710 | { |
12711 | const char *sym_name; | |
12712 | struct symbol *sym; | |
f7f9143b | 12713 | |
0259addd JB |
12714 | /* First, find out which exception support info to use. */ |
12715 | ada_exception_support_info_sniffer (); | |
12716 | ||
12717 | /* Then lookup the function on which we will break in order to catch | |
f7f9143b | 12718 | the Ada exceptions requested by the user. */ |
f7f9143b JB |
12719 | sym_name = ada_exception_sym_name (ex); |
12720 | sym = standard_lookup (sym_name, NULL, VAR_DOMAIN); | |
12721 | ||
57aff202 JB |
12722 | if (sym == NULL) |
12723 | error (_("Catchpoint symbol not found: %s"), sym_name); | |
12724 | ||
12725 | if (SYMBOL_CLASS (sym) != LOC_BLOCK) | |
12726 | error (_("Unable to insert catchpoint. %s is not a function."), sym_name); | |
f7f9143b JB |
12727 | |
12728 | /* Set ADDR_STRING. */ | |
cc12f4a8 | 12729 | *addr_string = sym_name; |
f7f9143b | 12730 | |
f7f9143b | 12731 | /* Set OPS. */ |
4b9eee8c | 12732 | *ops = ada_exception_breakpoint_ops (ex); |
f7f9143b | 12733 | |
f17011e0 | 12734 | return find_function_start_sal (sym, 1); |
f7f9143b JB |
12735 | } |
12736 | ||
b4a5b78b | 12737 | /* Create an Ada exception catchpoint. |
f7f9143b | 12738 | |
b4a5b78b | 12739 | EX_KIND is the kind of exception catchpoint to be created. |
5845583d | 12740 | |
bc18fbb5 | 12741 | If EXCEPT_STRING is empty, this catchpoint is expected to trigger |
2df4d1d5 | 12742 | for all exceptions. Otherwise, EXCEPT_STRING indicates the name |
bc18fbb5 | 12743 | of the exception to which this catchpoint applies. |
2df4d1d5 | 12744 | |
bc18fbb5 | 12745 | COND_STRING, if not empty, is the catchpoint condition. |
f7f9143b | 12746 | |
b4a5b78b JB |
12747 | TEMPFLAG, if nonzero, means that the underlying breakpoint |
12748 | should be temporary. | |
28010a5d | 12749 | |
b4a5b78b | 12750 | FROM_TTY is the usual argument passed to all commands implementations. */ |
28010a5d | 12751 | |
349774ef | 12752 | void |
28010a5d | 12753 | create_ada_exception_catchpoint (struct gdbarch *gdbarch, |
761269c8 | 12754 | enum ada_exception_catchpoint_kind ex_kind, |
bc18fbb5 | 12755 | const std::string &excep_string, |
56ecd069 | 12756 | const std::string &cond_string, |
28010a5d | 12757 | int tempflag, |
349774ef | 12758 | int disabled, |
28010a5d PA |
12759 | int from_tty) |
12760 | { | |
cc12f4a8 | 12761 | std::string addr_string; |
b4a5b78b | 12762 | const struct breakpoint_ops *ops = NULL; |
bc18fbb5 | 12763 | struct symtab_and_line sal = ada_exception_sal (ex_kind, &addr_string, &ops); |
28010a5d | 12764 | |
37f6a7f4 | 12765 | std::unique_ptr<ada_catchpoint> c (new ada_catchpoint (ex_kind)); |
cc12f4a8 | 12766 | init_ada_exception_breakpoint (c.get (), gdbarch, sal, addr_string.c_str (), |
349774ef | 12767 | ops, tempflag, disabled, from_tty); |
28010a5d | 12768 | c->excep_string = excep_string; |
9f757bf7 | 12769 | create_excep_cond_exprs (c.get (), ex_kind); |
56ecd069 | 12770 | if (!cond_string.empty ()) |
733d554a | 12771 | set_breakpoint_condition (c.get (), cond_string.c_str (), from_tty, false); |
b270e6f9 | 12772 | install_breakpoint (0, std::move (c), 1); |
f7f9143b JB |
12773 | } |
12774 | ||
9ac4176b PA |
12775 | /* Implement the "catch exception" command. */ |
12776 | ||
12777 | static void | |
eb4c3f4a | 12778 | catch_ada_exception_command (const char *arg_entry, int from_tty, |
9ac4176b PA |
12779 | struct cmd_list_element *command) |
12780 | { | |
a121b7c1 | 12781 | const char *arg = arg_entry; |
9ac4176b PA |
12782 | struct gdbarch *gdbarch = get_current_arch (); |
12783 | int tempflag; | |
761269c8 | 12784 | enum ada_exception_catchpoint_kind ex_kind; |
bc18fbb5 | 12785 | std::string excep_string; |
56ecd069 | 12786 | std::string cond_string; |
9ac4176b PA |
12787 | |
12788 | tempflag = get_cmd_context (command) == CATCH_TEMPORARY; | |
12789 | ||
12790 | if (!arg) | |
12791 | arg = ""; | |
9f757bf7 | 12792 | catch_ada_exception_command_split (arg, false, &ex_kind, &excep_string, |
bc18fbb5 | 12793 | &cond_string); |
9f757bf7 XR |
12794 | create_ada_exception_catchpoint (gdbarch, ex_kind, |
12795 | excep_string, cond_string, | |
12796 | tempflag, 1 /* enabled */, | |
12797 | from_tty); | |
12798 | } | |
12799 | ||
12800 | /* Implement the "catch handlers" command. */ | |
12801 | ||
12802 | static void | |
12803 | catch_ada_handlers_command (const char *arg_entry, int from_tty, | |
12804 | struct cmd_list_element *command) | |
12805 | { | |
12806 | const char *arg = arg_entry; | |
12807 | struct gdbarch *gdbarch = get_current_arch (); | |
12808 | int tempflag; | |
12809 | enum ada_exception_catchpoint_kind ex_kind; | |
bc18fbb5 | 12810 | std::string excep_string; |
56ecd069 | 12811 | std::string cond_string; |
9f757bf7 XR |
12812 | |
12813 | tempflag = get_cmd_context (command) == CATCH_TEMPORARY; | |
12814 | ||
12815 | if (!arg) | |
12816 | arg = ""; | |
12817 | catch_ada_exception_command_split (arg, true, &ex_kind, &excep_string, | |
bc18fbb5 | 12818 | &cond_string); |
b4a5b78b JB |
12819 | create_ada_exception_catchpoint (gdbarch, ex_kind, |
12820 | excep_string, cond_string, | |
349774ef JB |
12821 | tempflag, 1 /* enabled */, |
12822 | from_tty); | |
9ac4176b PA |
12823 | } |
12824 | ||
71bed2db TT |
12825 | /* Completion function for the Ada "catch" commands. */ |
12826 | ||
12827 | static void | |
12828 | catch_ada_completer (struct cmd_list_element *cmd, completion_tracker &tracker, | |
12829 | const char *text, const char *word) | |
12830 | { | |
12831 | std::vector<ada_exc_info> exceptions = ada_exceptions_list (NULL); | |
12832 | ||
12833 | for (const ada_exc_info &info : exceptions) | |
12834 | { | |
12835 | if (startswith (info.name, word)) | |
b02f78f9 | 12836 | tracker.add_completion (make_unique_xstrdup (info.name)); |
71bed2db TT |
12837 | } |
12838 | } | |
12839 | ||
b4a5b78b | 12840 | /* Split the arguments specified in a "catch assert" command. |
5845583d | 12841 | |
b4a5b78b JB |
12842 | ARGS contains the command's arguments (or the empty string if |
12843 | no arguments were passed). | |
5845583d JB |
12844 | |
12845 | If ARGS contains a condition, set COND_STRING to that condition | |
b4a5b78b | 12846 | (the memory needs to be deallocated after use). */ |
5845583d | 12847 | |
b4a5b78b | 12848 | static void |
56ecd069 | 12849 | catch_ada_assert_command_split (const char *args, std::string &cond_string) |
f7f9143b | 12850 | { |
f1735a53 | 12851 | args = skip_spaces (args); |
f7f9143b | 12852 | |
5845583d | 12853 | /* Check whether a condition was provided. */ |
61012eef | 12854 | if (startswith (args, "if") |
5845583d | 12855 | && (isspace (args[2]) || args[2] == '\0')) |
f7f9143b | 12856 | { |
5845583d | 12857 | args += 2; |
f1735a53 | 12858 | args = skip_spaces (args); |
5845583d | 12859 | if (args[0] == '\0') |
dda83cd7 | 12860 | error (_("condition missing after `if' keyword")); |
56ecd069 | 12861 | cond_string.assign (args); |
f7f9143b JB |
12862 | } |
12863 | ||
5845583d JB |
12864 | /* Otherwise, there should be no other argument at the end of |
12865 | the command. */ | |
12866 | else if (args[0] != '\0') | |
12867 | error (_("Junk at end of arguments.")); | |
f7f9143b JB |
12868 | } |
12869 | ||
9ac4176b PA |
12870 | /* Implement the "catch assert" command. */ |
12871 | ||
12872 | static void | |
eb4c3f4a | 12873 | catch_assert_command (const char *arg_entry, int from_tty, |
9ac4176b PA |
12874 | struct cmd_list_element *command) |
12875 | { | |
a121b7c1 | 12876 | const char *arg = arg_entry; |
9ac4176b PA |
12877 | struct gdbarch *gdbarch = get_current_arch (); |
12878 | int tempflag; | |
56ecd069 | 12879 | std::string cond_string; |
9ac4176b PA |
12880 | |
12881 | tempflag = get_cmd_context (command) == CATCH_TEMPORARY; | |
12882 | ||
12883 | if (!arg) | |
12884 | arg = ""; | |
56ecd069 | 12885 | catch_ada_assert_command_split (arg, cond_string); |
761269c8 | 12886 | create_ada_exception_catchpoint (gdbarch, ada_catch_assert, |
241db429 | 12887 | "", cond_string, |
349774ef JB |
12888 | tempflag, 1 /* enabled */, |
12889 | from_tty); | |
9ac4176b | 12890 | } |
778865d3 JB |
12891 | |
12892 | /* Return non-zero if the symbol SYM is an Ada exception object. */ | |
12893 | ||
12894 | static int | |
12895 | ada_is_exception_sym (struct symbol *sym) | |
12896 | { | |
7d93a1e0 | 12897 | const char *type_name = SYMBOL_TYPE (sym)->name (); |
778865d3 JB |
12898 | |
12899 | return (SYMBOL_CLASS (sym) != LOC_TYPEDEF | |
dda83cd7 SM |
12900 | && SYMBOL_CLASS (sym) != LOC_BLOCK |
12901 | && SYMBOL_CLASS (sym) != LOC_CONST | |
12902 | && SYMBOL_CLASS (sym) != LOC_UNRESOLVED | |
12903 | && type_name != NULL && strcmp (type_name, "exception") == 0); | |
778865d3 JB |
12904 | } |
12905 | ||
12906 | /* Given a global symbol SYM, return non-zero iff SYM is a non-standard | |
12907 | Ada exception object. This matches all exceptions except the ones | |
12908 | defined by the Ada language. */ | |
12909 | ||
12910 | static int | |
12911 | ada_is_non_standard_exception_sym (struct symbol *sym) | |
12912 | { | |
12913 | int i; | |
12914 | ||
12915 | if (!ada_is_exception_sym (sym)) | |
12916 | return 0; | |
12917 | ||
12918 | for (i = 0; i < ARRAY_SIZE (standard_exc); i++) | |
987012b8 | 12919 | if (strcmp (sym->linkage_name (), standard_exc[i]) == 0) |
778865d3 JB |
12920 | return 0; /* A standard exception. */ |
12921 | ||
12922 | /* Numeric_Error is also a standard exception, so exclude it. | |
12923 | See the STANDARD_EXC description for more details as to why | |
12924 | this exception is not listed in that array. */ | |
987012b8 | 12925 | if (strcmp (sym->linkage_name (), "numeric_error") == 0) |
778865d3 JB |
12926 | return 0; |
12927 | ||
12928 | return 1; | |
12929 | } | |
12930 | ||
ab816a27 | 12931 | /* A helper function for std::sort, comparing two struct ada_exc_info |
778865d3 JB |
12932 | objects. |
12933 | ||
12934 | The comparison is determined first by exception name, and then | |
12935 | by exception address. */ | |
12936 | ||
ab816a27 | 12937 | bool |
cc536b21 | 12938 | ada_exc_info::operator< (const ada_exc_info &other) const |
778865d3 | 12939 | { |
778865d3 JB |
12940 | int result; |
12941 | ||
ab816a27 TT |
12942 | result = strcmp (name, other.name); |
12943 | if (result < 0) | |
12944 | return true; | |
12945 | if (result == 0 && addr < other.addr) | |
12946 | return true; | |
12947 | return false; | |
12948 | } | |
778865d3 | 12949 | |
ab816a27 | 12950 | bool |
cc536b21 | 12951 | ada_exc_info::operator== (const ada_exc_info &other) const |
ab816a27 TT |
12952 | { |
12953 | return addr == other.addr && strcmp (name, other.name) == 0; | |
778865d3 JB |
12954 | } |
12955 | ||
12956 | /* Sort EXCEPTIONS using compare_ada_exception_info as the comparison | |
12957 | routine, but keeping the first SKIP elements untouched. | |
12958 | ||
12959 | All duplicates are also removed. */ | |
12960 | ||
12961 | static void | |
ab816a27 | 12962 | sort_remove_dups_ada_exceptions_list (std::vector<ada_exc_info> *exceptions, |
778865d3 JB |
12963 | int skip) |
12964 | { | |
ab816a27 TT |
12965 | std::sort (exceptions->begin () + skip, exceptions->end ()); |
12966 | exceptions->erase (std::unique (exceptions->begin () + skip, exceptions->end ()), | |
12967 | exceptions->end ()); | |
778865d3 JB |
12968 | } |
12969 | ||
778865d3 JB |
12970 | /* Add all exceptions defined by the Ada standard whose name match |
12971 | a regular expression. | |
12972 | ||
12973 | If PREG is not NULL, then this regexp_t object is used to | |
12974 | perform the symbol name matching. Otherwise, no name-based | |
12975 | filtering is performed. | |
12976 | ||
12977 | EXCEPTIONS is a vector of exceptions to which matching exceptions | |
12978 | gets pushed. */ | |
12979 | ||
12980 | static void | |
2d7cc5c7 | 12981 | ada_add_standard_exceptions (compiled_regex *preg, |
ab816a27 | 12982 | std::vector<ada_exc_info> *exceptions) |
778865d3 JB |
12983 | { |
12984 | int i; | |
12985 | ||
12986 | for (i = 0; i < ARRAY_SIZE (standard_exc); i++) | |
12987 | { | |
12988 | if (preg == NULL | |
2d7cc5c7 | 12989 | || preg->exec (standard_exc[i], 0, NULL, 0) == 0) |
778865d3 JB |
12990 | { |
12991 | struct bound_minimal_symbol msymbol | |
12992 | = ada_lookup_simple_minsym (standard_exc[i]); | |
12993 | ||
12994 | if (msymbol.minsym != NULL) | |
12995 | { | |
12996 | struct ada_exc_info info | |
77e371c0 | 12997 | = {standard_exc[i], BMSYMBOL_VALUE_ADDRESS (msymbol)}; |
778865d3 | 12998 | |
ab816a27 | 12999 | exceptions->push_back (info); |
778865d3 JB |
13000 | } |
13001 | } | |
13002 | } | |
13003 | } | |
13004 | ||
13005 | /* Add all Ada exceptions defined locally and accessible from the given | |
13006 | FRAME. | |
13007 | ||
13008 | If PREG is not NULL, then this regexp_t object is used to | |
13009 | perform the symbol name matching. Otherwise, no name-based | |
13010 | filtering is performed. | |
13011 | ||
13012 | EXCEPTIONS is a vector of exceptions to which matching exceptions | |
13013 | gets pushed. */ | |
13014 | ||
13015 | static void | |
2d7cc5c7 PA |
13016 | ada_add_exceptions_from_frame (compiled_regex *preg, |
13017 | struct frame_info *frame, | |
ab816a27 | 13018 | std::vector<ada_exc_info> *exceptions) |
778865d3 | 13019 | { |
3977b71f | 13020 | const struct block *block = get_frame_block (frame, 0); |
778865d3 JB |
13021 | |
13022 | while (block != 0) | |
13023 | { | |
13024 | struct block_iterator iter; | |
13025 | struct symbol *sym; | |
13026 | ||
13027 | ALL_BLOCK_SYMBOLS (block, iter, sym) | |
13028 | { | |
13029 | switch (SYMBOL_CLASS (sym)) | |
13030 | { | |
13031 | case LOC_TYPEDEF: | |
13032 | case LOC_BLOCK: | |
13033 | case LOC_CONST: | |
13034 | break; | |
13035 | default: | |
13036 | if (ada_is_exception_sym (sym)) | |
13037 | { | |
987012b8 | 13038 | struct ada_exc_info info = {sym->print_name (), |
778865d3 JB |
13039 | SYMBOL_VALUE_ADDRESS (sym)}; |
13040 | ||
ab816a27 | 13041 | exceptions->push_back (info); |
778865d3 JB |
13042 | } |
13043 | } | |
13044 | } | |
13045 | if (BLOCK_FUNCTION (block) != NULL) | |
13046 | break; | |
13047 | block = BLOCK_SUPERBLOCK (block); | |
13048 | } | |
13049 | } | |
13050 | ||
14bc53a8 PA |
13051 | /* Return true if NAME matches PREG or if PREG is NULL. */ |
13052 | ||
13053 | static bool | |
2d7cc5c7 | 13054 | name_matches_regex (const char *name, compiled_regex *preg) |
14bc53a8 PA |
13055 | { |
13056 | return (preg == NULL | |
f945dedf | 13057 | || preg->exec (ada_decode (name).c_str (), 0, NULL, 0) == 0); |
14bc53a8 PA |
13058 | } |
13059 | ||
778865d3 JB |
13060 | /* Add all exceptions defined globally whose name name match |
13061 | a regular expression, excluding standard exceptions. | |
13062 | ||
13063 | The reason we exclude standard exceptions is that they need | |
13064 | to be handled separately: Standard exceptions are defined inside | |
13065 | a runtime unit which is normally not compiled with debugging info, | |
13066 | and thus usually do not show up in our symbol search. However, | |
13067 | if the unit was in fact built with debugging info, we need to | |
13068 | exclude them because they would duplicate the entry we found | |
13069 | during the special loop that specifically searches for those | |
13070 | standard exceptions. | |
13071 | ||
13072 | If PREG is not NULL, then this regexp_t object is used to | |
13073 | perform the symbol name matching. Otherwise, no name-based | |
13074 | filtering is performed. | |
13075 | ||
13076 | EXCEPTIONS is a vector of exceptions to which matching exceptions | |
13077 | gets pushed. */ | |
13078 | ||
13079 | static void | |
2d7cc5c7 | 13080 | ada_add_global_exceptions (compiled_regex *preg, |
ab816a27 | 13081 | std::vector<ada_exc_info> *exceptions) |
778865d3 | 13082 | { |
14bc53a8 PA |
13083 | /* In Ada, the symbol "search name" is a linkage name, whereas the |
13084 | regular expression used to do the matching refers to the natural | |
13085 | name. So match against the decoded name. */ | |
13086 | expand_symtabs_matching (NULL, | |
b5ec771e | 13087 | lookup_name_info::match_any (), |
14bc53a8 PA |
13088 | [&] (const char *search_name) |
13089 | { | |
f945dedf CB |
13090 | std::string decoded = ada_decode (search_name); |
13091 | return name_matches_regex (decoded.c_str (), preg); | |
14bc53a8 PA |
13092 | }, |
13093 | NULL, | |
13094 | VARIABLES_DOMAIN); | |
778865d3 | 13095 | |
2030c079 | 13096 | for (objfile *objfile : current_program_space->objfiles ()) |
778865d3 | 13097 | { |
b669c953 | 13098 | for (compunit_symtab *s : objfile->compunits ()) |
778865d3 | 13099 | { |
d8aeb77f TT |
13100 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (s); |
13101 | int i; | |
778865d3 | 13102 | |
d8aeb77f TT |
13103 | for (i = GLOBAL_BLOCK; i <= STATIC_BLOCK; i++) |
13104 | { | |
582942f4 | 13105 | const struct block *b = BLOCKVECTOR_BLOCK (bv, i); |
d8aeb77f TT |
13106 | struct block_iterator iter; |
13107 | struct symbol *sym; | |
778865d3 | 13108 | |
d8aeb77f TT |
13109 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
13110 | if (ada_is_non_standard_exception_sym (sym) | |
987012b8 | 13111 | && name_matches_regex (sym->natural_name (), preg)) |
d8aeb77f TT |
13112 | { |
13113 | struct ada_exc_info info | |
987012b8 | 13114 | = {sym->print_name (), SYMBOL_VALUE_ADDRESS (sym)}; |
d8aeb77f TT |
13115 | |
13116 | exceptions->push_back (info); | |
13117 | } | |
13118 | } | |
778865d3 JB |
13119 | } |
13120 | } | |
13121 | } | |
13122 | ||
13123 | /* Implements ada_exceptions_list with the regular expression passed | |
13124 | as a regex_t, rather than a string. | |
13125 | ||
13126 | If not NULL, PREG is used to filter out exceptions whose names | |
13127 | do not match. Otherwise, all exceptions are listed. */ | |
13128 | ||
ab816a27 | 13129 | static std::vector<ada_exc_info> |
2d7cc5c7 | 13130 | ada_exceptions_list_1 (compiled_regex *preg) |
778865d3 | 13131 | { |
ab816a27 | 13132 | std::vector<ada_exc_info> result; |
778865d3 JB |
13133 | int prev_len; |
13134 | ||
13135 | /* First, list the known standard exceptions. These exceptions | |
13136 | need to be handled separately, as they are usually defined in | |
13137 | runtime units that have been compiled without debugging info. */ | |
13138 | ||
13139 | ada_add_standard_exceptions (preg, &result); | |
13140 | ||
13141 | /* Next, find all exceptions whose scope is local and accessible | |
13142 | from the currently selected frame. */ | |
13143 | ||
13144 | if (has_stack_frames ()) | |
13145 | { | |
ab816a27 | 13146 | prev_len = result.size (); |
778865d3 JB |
13147 | ada_add_exceptions_from_frame (preg, get_selected_frame (NULL), |
13148 | &result); | |
ab816a27 | 13149 | if (result.size () > prev_len) |
778865d3 JB |
13150 | sort_remove_dups_ada_exceptions_list (&result, prev_len); |
13151 | } | |
13152 | ||
13153 | /* Add all exceptions whose scope is global. */ | |
13154 | ||
ab816a27 | 13155 | prev_len = result.size (); |
778865d3 | 13156 | ada_add_global_exceptions (preg, &result); |
ab816a27 | 13157 | if (result.size () > prev_len) |
778865d3 JB |
13158 | sort_remove_dups_ada_exceptions_list (&result, prev_len); |
13159 | ||
778865d3 JB |
13160 | return result; |
13161 | } | |
13162 | ||
13163 | /* Return a vector of ada_exc_info. | |
13164 | ||
13165 | If REGEXP is NULL, all exceptions are included in the result. | |
13166 | Otherwise, it should contain a valid regular expression, | |
13167 | and only the exceptions whose names match that regular expression | |
13168 | are included in the result. | |
13169 | ||
13170 | The exceptions are sorted in the following order: | |
13171 | - Standard exceptions (defined by the Ada language), in | |
13172 | alphabetical order; | |
13173 | - Exceptions only visible from the current frame, in | |
13174 | alphabetical order; | |
13175 | - Exceptions whose scope is global, in alphabetical order. */ | |
13176 | ||
ab816a27 | 13177 | std::vector<ada_exc_info> |
778865d3 JB |
13178 | ada_exceptions_list (const char *regexp) |
13179 | { | |
2d7cc5c7 PA |
13180 | if (regexp == NULL) |
13181 | return ada_exceptions_list_1 (NULL); | |
778865d3 | 13182 | |
2d7cc5c7 PA |
13183 | compiled_regex reg (regexp, REG_NOSUB, _("invalid regular expression")); |
13184 | return ada_exceptions_list_1 (®); | |
778865d3 JB |
13185 | } |
13186 | ||
13187 | /* Implement the "info exceptions" command. */ | |
13188 | ||
13189 | static void | |
1d12d88f | 13190 | info_exceptions_command (const char *regexp, int from_tty) |
778865d3 | 13191 | { |
778865d3 | 13192 | struct gdbarch *gdbarch = get_current_arch (); |
778865d3 | 13193 | |
ab816a27 | 13194 | std::vector<ada_exc_info> exceptions = ada_exceptions_list (regexp); |
778865d3 JB |
13195 | |
13196 | if (regexp != NULL) | |
13197 | printf_filtered | |
13198 | (_("All Ada exceptions matching regular expression \"%s\":\n"), regexp); | |
13199 | else | |
13200 | printf_filtered (_("All defined Ada exceptions:\n")); | |
13201 | ||
ab816a27 TT |
13202 | for (const ada_exc_info &info : exceptions) |
13203 | printf_filtered ("%s: %s\n", info.name, paddress (gdbarch, info.addr)); | |
778865d3 JB |
13204 | } |
13205 | ||
dda83cd7 | 13206 | /* Operators */ |
4c4b4cd2 PH |
13207 | /* Information about operators given special treatment in functions |
13208 | below. */ | |
13209 | /* Format: OP_DEFN (<operator>, <operator length>, <# args>, <binop>). */ | |
13210 | ||
13211 | #define ADA_OPERATORS \ | |
13212 | OP_DEFN (OP_VAR_VALUE, 4, 0, 0) \ | |
13213 | OP_DEFN (BINOP_IN_BOUNDS, 3, 2, 0) \ | |
13214 | OP_DEFN (TERNOP_IN_RANGE, 1, 3, 0) \ | |
13215 | OP_DEFN (OP_ATR_FIRST, 1, 2, 0) \ | |
13216 | OP_DEFN (OP_ATR_LAST, 1, 2, 0) \ | |
13217 | OP_DEFN (OP_ATR_LENGTH, 1, 2, 0) \ | |
13218 | OP_DEFN (OP_ATR_IMAGE, 1, 2, 0) \ | |
13219 | OP_DEFN (OP_ATR_MAX, 1, 3, 0) \ | |
13220 | OP_DEFN (OP_ATR_MIN, 1, 3, 0) \ | |
13221 | OP_DEFN (OP_ATR_MODULUS, 1, 1, 0) \ | |
13222 | OP_DEFN (OP_ATR_POS, 1, 2, 0) \ | |
13223 | OP_DEFN (OP_ATR_SIZE, 1, 1, 0) \ | |
13224 | OP_DEFN (OP_ATR_TAG, 1, 1, 0) \ | |
13225 | OP_DEFN (OP_ATR_VAL, 1, 2, 0) \ | |
13226 | OP_DEFN (UNOP_QUAL, 3, 1, 0) \ | |
52ce6436 PH |
13227 | OP_DEFN (UNOP_IN_RANGE, 3, 1, 0) \ |
13228 | OP_DEFN (OP_OTHERS, 1, 1, 0) \ | |
13229 | OP_DEFN (OP_POSITIONAL, 3, 1, 0) \ | |
13230 | OP_DEFN (OP_DISCRETE_RANGE, 1, 2, 0) | |
4c4b4cd2 PH |
13231 | |
13232 | static void | |
554794dc SDJ |
13233 | ada_operator_length (const struct expression *exp, int pc, int *oplenp, |
13234 | int *argsp) | |
4c4b4cd2 PH |
13235 | { |
13236 | switch (exp->elts[pc - 1].opcode) | |
13237 | { | |
76a01679 | 13238 | default: |
4c4b4cd2 PH |
13239 | operator_length_standard (exp, pc, oplenp, argsp); |
13240 | break; | |
13241 | ||
13242 | #define OP_DEFN(op, len, args, binop) \ | |
13243 | case op: *oplenp = len; *argsp = args; break; | |
13244 | ADA_OPERATORS; | |
13245 | #undef OP_DEFN | |
52ce6436 PH |
13246 | |
13247 | case OP_AGGREGATE: | |
13248 | *oplenp = 3; | |
13249 | *argsp = longest_to_int (exp->elts[pc - 2].longconst); | |
13250 | break; | |
13251 | ||
13252 | case OP_CHOICES: | |
13253 | *oplenp = 3; | |
13254 | *argsp = longest_to_int (exp->elts[pc - 2].longconst) + 1; | |
13255 | break; | |
4c4b4cd2 PH |
13256 | } |
13257 | } | |
13258 | ||
c0201579 JK |
13259 | /* Implementation of the exp_descriptor method operator_check. */ |
13260 | ||
13261 | static int | |
13262 | ada_operator_check (struct expression *exp, int pos, | |
13263 | int (*objfile_func) (struct objfile *objfile, void *data), | |
13264 | void *data) | |
13265 | { | |
13266 | const union exp_element *const elts = exp->elts; | |
13267 | struct type *type = NULL; | |
13268 | ||
13269 | switch (elts[pos].opcode) | |
13270 | { | |
13271 | case UNOP_IN_RANGE: | |
13272 | case UNOP_QUAL: | |
13273 | type = elts[pos + 1].type; | |
13274 | break; | |
13275 | ||
13276 | default: | |
13277 | return operator_check_standard (exp, pos, objfile_func, data); | |
13278 | } | |
13279 | ||
13280 | /* Invoke callbacks for TYPE and OBJFILE if they were set as non-NULL. */ | |
13281 | ||
13282 | if (type && TYPE_OBJFILE (type) | |
13283 | && (*objfile_func) (TYPE_OBJFILE (type), data)) | |
13284 | return 1; | |
13285 | ||
13286 | return 0; | |
13287 | } | |
13288 | ||
4c4b4cd2 PH |
13289 | /* As for operator_length, but assumes PC is pointing at the first |
13290 | element of the operator, and gives meaningful results only for the | |
52ce6436 | 13291 | Ada-specific operators, returning 0 for *OPLENP and *ARGSP otherwise. */ |
4c4b4cd2 PH |
13292 | |
13293 | static void | |
76a01679 | 13294 | ada_forward_operator_length (struct expression *exp, int pc, |
dda83cd7 | 13295 | int *oplenp, int *argsp) |
4c4b4cd2 | 13296 | { |
76a01679 | 13297 | switch (exp->elts[pc].opcode) |
4c4b4cd2 PH |
13298 | { |
13299 | default: | |
13300 | *oplenp = *argsp = 0; | |
13301 | break; | |
52ce6436 | 13302 | |
4c4b4cd2 PH |
13303 | #define OP_DEFN(op, len, args, binop) \ |
13304 | case op: *oplenp = len; *argsp = args; break; | |
13305 | ADA_OPERATORS; | |
13306 | #undef OP_DEFN | |
52ce6436 PH |
13307 | |
13308 | case OP_AGGREGATE: | |
13309 | *oplenp = 3; | |
13310 | *argsp = longest_to_int (exp->elts[pc + 1].longconst); | |
13311 | break; | |
13312 | ||
13313 | case OP_CHOICES: | |
13314 | *oplenp = 3; | |
13315 | *argsp = longest_to_int (exp->elts[pc + 1].longconst) + 1; | |
13316 | break; | |
13317 | ||
13318 | case OP_STRING: | |
13319 | case OP_NAME: | |
13320 | { | |
13321 | int len = longest_to_int (exp->elts[pc + 1].longconst); | |
5b4ee69b | 13322 | |
52ce6436 PH |
13323 | *oplenp = 4 + BYTES_TO_EXP_ELEM (len + 1); |
13324 | *argsp = 0; | |
13325 | break; | |
13326 | } | |
4c4b4cd2 PH |
13327 | } |
13328 | } | |
13329 | ||
13330 | static int | |
13331 | ada_dump_subexp_body (struct expression *exp, struct ui_file *stream, int elt) | |
13332 | { | |
13333 | enum exp_opcode op = exp->elts[elt].opcode; | |
13334 | int oplen, nargs; | |
13335 | int pc = elt; | |
13336 | int i; | |
76a01679 | 13337 | |
4c4b4cd2 PH |
13338 | ada_forward_operator_length (exp, elt, &oplen, &nargs); |
13339 | ||
76a01679 | 13340 | switch (op) |
4c4b4cd2 | 13341 | { |
76a01679 | 13342 | /* Ada attributes ('Foo). */ |
4c4b4cd2 PH |
13343 | case OP_ATR_FIRST: |
13344 | case OP_ATR_LAST: | |
13345 | case OP_ATR_LENGTH: | |
13346 | case OP_ATR_IMAGE: | |
13347 | case OP_ATR_MAX: | |
13348 | case OP_ATR_MIN: | |
13349 | case OP_ATR_MODULUS: | |
13350 | case OP_ATR_POS: | |
13351 | case OP_ATR_SIZE: | |
13352 | case OP_ATR_TAG: | |
13353 | case OP_ATR_VAL: | |
13354 | break; | |
13355 | ||
13356 | case UNOP_IN_RANGE: | |
13357 | case UNOP_QUAL: | |
323e0a4a AC |
13358 | /* XXX: gdb_sprint_host_address, type_sprint */ |
13359 | fprintf_filtered (stream, _("Type @")); | |
4c4b4cd2 PH |
13360 | gdb_print_host_address (exp->elts[pc + 1].type, stream); |
13361 | fprintf_filtered (stream, " ("); | |
13362 | type_print (exp->elts[pc + 1].type, NULL, stream, 0); | |
13363 | fprintf_filtered (stream, ")"); | |
13364 | break; | |
13365 | case BINOP_IN_BOUNDS: | |
52ce6436 PH |
13366 | fprintf_filtered (stream, " (%d)", |
13367 | longest_to_int (exp->elts[pc + 2].longconst)); | |
4c4b4cd2 PH |
13368 | break; |
13369 | case TERNOP_IN_RANGE: | |
13370 | break; | |
13371 | ||
52ce6436 PH |
13372 | case OP_AGGREGATE: |
13373 | case OP_OTHERS: | |
13374 | case OP_DISCRETE_RANGE: | |
13375 | case OP_POSITIONAL: | |
13376 | case OP_CHOICES: | |
13377 | break; | |
13378 | ||
13379 | case OP_NAME: | |
13380 | case OP_STRING: | |
13381 | { | |
13382 | char *name = &exp->elts[elt + 2].string; | |
13383 | int len = longest_to_int (exp->elts[elt + 1].longconst); | |
5b4ee69b | 13384 | |
52ce6436 PH |
13385 | fprintf_filtered (stream, "Text: `%.*s'", len, name); |
13386 | break; | |
13387 | } | |
13388 | ||
4c4b4cd2 PH |
13389 | default: |
13390 | return dump_subexp_body_standard (exp, stream, elt); | |
13391 | } | |
13392 | ||
13393 | elt += oplen; | |
13394 | for (i = 0; i < nargs; i += 1) | |
13395 | elt = dump_subexp (exp, stream, elt); | |
13396 | ||
13397 | return elt; | |
13398 | } | |
13399 | ||
13400 | /* The Ada extension of print_subexp (q.v.). */ | |
13401 | ||
76a01679 JB |
13402 | static void |
13403 | ada_print_subexp (struct expression *exp, int *pos, | |
dda83cd7 | 13404 | struct ui_file *stream, enum precedence prec) |
4c4b4cd2 | 13405 | { |
52ce6436 | 13406 | int oplen, nargs, i; |
4c4b4cd2 PH |
13407 | int pc = *pos; |
13408 | enum exp_opcode op = exp->elts[pc].opcode; | |
13409 | ||
13410 | ada_forward_operator_length (exp, pc, &oplen, &nargs); | |
13411 | ||
52ce6436 | 13412 | *pos += oplen; |
4c4b4cd2 PH |
13413 | switch (op) |
13414 | { | |
13415 | default: | |
52ce6436 | 13416 | *pos -= oplen; |
4c4b4cd2 PH |
13417 | print_subexp_standard (exp, pos, stream, prec); |
13418 | return; | |
13419 | ||
13420 | case OP_VAR_VALUE: | |
987012b8 | 13421 | fputs_filtered (exp->elts[pc + 2].symbol->natural_name (), stream); |
4c4b4cd2 PH |
13422 | return; |
13423 | ||
13424 | case BINOP_IN_BOUNDS: | |
323e0a4a | 13425 | /* XXX: sprint_subexp */ |
4c4b4cd2 | 13426 | print_subexp (exp, pos, stream, PREC_SUFFIX); |
0b48a291 | 13427 | fputs_filtered (" in ", stream); |
4c4b4cd2 | 13428 | print_subexp (exp, pos, stream, PREC_SUFFIX); |
0b48a291 | 13429 | fputs_filtered ("'range", stream); |
4c4b4cd2 | 13430 | if (exp->elts[pc + 1].longconst > 1) |
dda83cd7 SM |
13431 | fprintf_filtered (stream, "(%ld)", |
13432 | (long) exp->elts[pc + 1].longconst); | |
4c4b4cd2 PH |
13433 | return; |
13434 | ||
13435 | case TERNOP_IN_RANGE: | |
4c4b4cd2 | 13436 | if (prec >= PREC_EQUAL) |
dda83cd7 | 13437 | fputs_filtered ("(", stream); |
323e0a4a | 13438 | /* XXX: sprint_subexp */ |
4c4b4cd2 | 13439 | print_subexp (exp, pos, stream, PREC_SUFFIX); |
0b48a291 | 13440 | fputs_filtered (" in ", stream); |
4c4b4cd2 PH |
13441 | print_subexp (exp, pos, stream, PREC_EQUAL); |
13442 | fputs_filtered (" .. ", stream); | |
13443 | print_subexp (exp, pos, stream, PREC_EQUAL); | |
13444 | if (prec >= PREC_EQUAL) | |
dda83cd7 | 13445 | fputs_filtered (")", stream); |
76a01679 | 13446 | return; |
4c4b4cd2 PH |
13447 | |
13448 | case OP_ATR_FIRST: | |
13449 | case OP_ATR_LAST: | |
13450 | case OP_ATR_LENGTH: | |
13451 | case OP_ATR_IMAGE: | |
13452 | case OP_ATR_MAX: | |
13453 | case OP_ATR_MIN: | |
13454 | case OP_ATR_MODULUS: | |
13455 | case OP_ATR_POS: | |
13456 | case OP_ATR_SIZE: | |
13457 | case OP_ATR_TAG: | |
13458 | case OP_ATR_VAL: | |
4c4b4cd2 | 13459 | if (exp->elts[*pos].opcode == OP_TYPE) |
dda83cd7 SM |
13460 | { |
13461 | if (exp->elts[*pos + 1].type->code () != TYPE_CODE_VOID) | |
13462 | LA_PRINT_TYPE (exp->elts[*pos + 1].type, "", stream, 0, 0, | |
79d43c61 | 13463 | &type_print_raw_options); |
dda83cd7 SM |
13464 | *pos += 3; |
13465 | } | |
4c4b4cd2 | 13466 | else |
dda83cd7 | 13467 | print_subexp (exp, pos, stream, PREC_SUFFIX); |
4c4b4cd2 PH |
13468 | fprintf_filtered (stream, "'%s", ada_attribute_name (op)); |
13469 | if (nargs > 1) | |
dda83cd7 SM |
13470 | { |
13471 | int tem; | |
13472 | ||
13473 | for (tem = 1; tem < nargs; tem += 1) | |
13474 | { | |
13475 | fputs_filtered ((tem == 1) ? " (" : ", ", stream); | |
13476 | print_subexp (exp, pos, stream, PREC_ABOVE_COMMA); | |
13477 | } | |
13478 | fputs_filtered (")", stream); | |
13479 | } | |
4c4b4cd2 | 13480 | return; |
14f9c5c9 | 13481 | |
4c4b4cd2 | 13482 | case UNOP_QUAL: |
4c4b4cd2 PH |
13483 | type_print (exp->elts[pc + 1].type, "", stream, 0); |
13484 | fputs_filtered ("'(", stream); | |
13485 | print_subexp (exp, pos, stream, PREC_PREFIX); | |
13486 | fputs_filtered (")", stream); | |
13487 | return; | |
14f9c5c9 | 13488 | |
4c4b4cd2 | 13489 | case UNOP_IN_RANGE: |
323e0a4a | 13490 | /* XXX: sprint_subexp */ |
4c4b4cd2 | 13491 | print_subexp (exp, pos, stream, PREC_SUFFIX); |
0b48a291 | 13492 | fputs_filtered (" in ", stream); |
79d43c61 TT |
13493 | LA_PRINT_TYPE (exp->elts[pc + 1].type, "", stream, 1, 0, |
13494 | &type_print_raw_options); | |
4c4b4cd2 | 13495 | return; |
52ce6436 PH |
13496 | |
13497 | case OP_DISCRETE_RANGE: | |
13498 | print_subexp (exp, pos, stream, PREC_SUFFIX); | |
13499 | fputs_filtered ("..", stream); | |
13500 | print_subexp (exp, pos, stream, PREC_SUFFIX); | |
13501 | return; | |
13502 | ||
13503 | case OP_OTHERS: | |
13504 | fputs_filtered ("others => ", stream); | |
13505 | print_subexp (exp, pos, stream, PREC_SUFFIX); | |
13506 | return; | |
13507 | ||
13508 | case OP_CHOICES: | |
13509 | for (i = 0; i < nargs-1; i += 1) | |
13510 | { | |
13511 | if (i > 0) | |
13512 | fputs_filtered ("|", stream); | |
13513 | print_subexp (exp, pos, stream, PREC_SUFFIX); | |
13514 | } | |
13515 | fputs_filtered (" => ", stream); | |
13516 | print_subexp (exp, pos, stream, PREC_SUFFIX); | |
13517 | return; | |
13518 | ||
13519 | case OP_POSITIONAL: | |
13520 | print_subexp (exp, pos, stream, PREC_SUFFIX); | |
13521 | return; | |
13522 | ||
13523 | case OP_AGGREGATE: | |
13524 | fputs_filtered ("(", stream); | |
13525 | for (i = 0; i < nargs; i += 1) | |
13526 | { | |
13527 | if (i > 0) | |
13528 | fputs_filtered (", ", stream); | |
13529 | print_subexp (exp, pos, stream, PREC_SUFFIX); | |
13530 | } | |
13531 | fputs_filtered (")", stream); | |
13532 | return; | |
4c4b4cd2 PH |
13533 | } |
13534 | } | |
14f9c5c9 AS |
13535 | |
13536 | /* Table mapping opcodes into strings for printing operators | |
13537 | and precedences of the operators. */ | |
13538 | ||
d2e4a39e AS |
13539 | static const struct op_print ada_op_print_tab[] = { |
13540 | {":=", BINOP_ASSIGN, PREC_ASSIGN, 1}, | |
13541 | {"or else", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0}, | |
13542 | {"and then", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0}, | |
13543 | {"or", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0}, | |
13544 | {"xor", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0}, | |
13545 | {"and", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0}, | |
13546 | {"=", BINOP_EQUAL, PREC_EQUAL, 0}, | |
13547 | {"/=", BINOP_NOTEQUAL, PREC_EQUAL, 0}, | |
13548 | {"<=", BINOP_LEQ, PREC_ORDER, 0}, | |
13549 | {">=", BINOP_GEQ, PREC_ORDER, 0}, | |
13550 | {">", BINOP_GTR, PREC_ORDER, 0}, | |
13551 | {"<", BINOP_LESS, PREC_ORDER, 0}, | |
13552 | {">>", BINOP_RSH, PREC_SHIFT, 0}, | |
13553 | {"<<", BINOP_LSH, PREC_SHIFT, 0}, | |
13554 | {"+", BINOP_ADD, PREC_ADD, 0}, | |
13555 | {"-", BINOP_SUB, PREC_ADD, 0}, | |
13556 | {"&", BINOP_CONCAT, PREC_ADD, 0}, | |
13557 | {"*", BINOP_MUL, PREC_MUL, 0}, | |
13558 | {"/", BINOP_DIV, PREC_MUL, 0}, | |
13559 | {"rem", BINOP_REM, PREC_MUL, 0}, | |
13560 | {"mod", BINOP_MOD, PREC_MUL, 0}, | |
13561 | {"**", BINOP_EXP, PREC_REPEAT, 0}, | |
13562 | {"@", BINOP_REPEAT, PREC_REPEAT, 0}, | |
13563 | {"-", UNOP_NEG, PREC_PREFIX, 0}, | |
13564 | {"+", UNOP_PLUS, PREC_PREFIX, 0}, | |
13565 | {"not ", UNOP_LOGICAL_NOT, PREC_PREFIX, 0}, | |
13566 | {"not ", UNOP_COMPLEMENT, PREC_PREFIX, 0}, | |
13567 | {"abs ", UNOP_ABS, PREC_PREFIX, 0}, | |
4c4b4cd2 PH |
13568 | {".all", UNOP_IND, PREC_SUFFIX, 1}, |
13569 | {"'access", UNOP_ADDR, PREC_SUFFIX, 1}, | |
13570 | {"'size", OP_ATR_SIZE, PREC_SUFFIX, 1}, | |
f486487f | 13571 | {NULL, OP_NULL, PREC_SUFFIX, 0} |
14f9c5c9 | 13572 | }; |
6c038f32 PH |
13573 | \f |
13574 | /* Language vector */ | |
13575 | ||
6c038f32 PH |
13576 | static const struct exp_descriptor ada_exp_descriptor = { |
13577 | ada_print_subexp, | |
13578 | ada_operator_length, | |
c0201579 | 13579 | ada_operator_check, |
6c038f32 PH |
13580 | ada_dump_subexp_body, |
13581 | ada_evaluate_subexp | |
13582 | }; | |
13583 | ||
b5ec771e PA |
13584 | /* symbol_name_matcher_ftype adapter for wild_match. */ |
13585 | ||
13586 | static bool | |
13587 | do_wild_match (const char *symbol_search_name, | |
13588 | const lookup_name_info &lookup_name, | |
a207cff2 | 13589 | completion_match_result *comp_match_res) |
b5ec771e PA |
13590 | { |
13591 | return wild_match (symbol_search_name, ada_lookup_name (lookup_name)); | |
13592 | } | |
13593 | ||
13594 | /* symbol_name_matcher_ftype adapter for full_match. */ | |
13595 | ||
13596 | static bool | |
13597 | do_full_match (const char *symbol_search_name, | |
13598 | const lookup_name_info &lookup_name, | |
a207cff2 | 13599 | completion_match_result *comp_match_res) |
b5ec771e PA |
13600 | { |
13601 | return full_match (symbol_search_name, ada_lookup_name (lookup_name)); | |
13602 | } | |
13603 | ||
a2cd4f14 JB |
13604 | /* symbol_name_matcher_ftype for exact (verbatim) matches. */ |
13605 | ||
13606 | static bool | |
13607 | do_exact_match (const char *symbol_search_name, | |
13608 | const lookup_name_info &lookup_name, | |
13609 | completion_match_result *comp_match_res) | |
13610 | { | |
13611 | return strcmp (symbol_search_name, ada_lookup_name (lookup_name)) == 0; | |
13612 | } | |
13613 | ||
b5ec771e PA |
13614 | /* Build the Ada lookup name for LOOKUP_NAME. */ |
13615 | ||
13616 | ada_lookup_name_info::ada_lookup_name_info (const lookup_name_info &lookup_name) | |
13617 | { | |
e0802d59 | 13618 | gdb::string_view user_name = lookup_name.name (); |
b5ec771e PA |
13619 | |
13620 | if (user_name[0] == '<') | |
13621 | { | |
13622 | if (user_name.back () == '>') | |
e0802d59 | 13623 | m_encoded_name |
5ac58899 | 13624 | = gdb::to_string (user_name.substr (1, user_name.size () - 2)); |
b5ec771e | 13625 | else |
e0802d59 | 13626 | m_encoded_name |
5ac58899 | 13627 | = gdb::to_string (user_name.substr (1, user_name.size () - 1)); |
b5ec771e PA |
13628 | m_encoded_p = true; |
13629 | m_verbatim_p = true; | |
13630 | m_wild_match_p = false; | |
13631 | m_standard_p = false; | |
13632 | } | |
13633 | else | |
13634 | { | |
13635 | m_verbatim_p = false; | |
13636 | ||
e0802d59 | 13637 | m_encoded_p = user_name.find ("__") != gdb::string_view::npos; |
b5ec771e PA |
13638 | |
13639 | if (!m_encoded_p) | |
13640 | { | |
e0802d59 | 13641 | const char *folded = ada_fold_name (user_name); |
5c4258f4 TT |
13642 | m_encoded_name = ada_encode_1 (folded, false); |
13643 | if (m_encoded_name.empty ()) | |
5ac58899 | 13644 | m_encoded_name = gdb::to_string (user_name); |
b5ec771e PA |
13645 | } |
13646 | else | |
5ac58899 | 13647 | m_encoded_name = gdb::to_string (user_name); |
b5ec771e PA |
13648 | |
13649 | /* Handle the 'package Standard' special case. See description | |
13650 | of m_standard_p. */ | |
13651 | if (startswith (m_encoded_name.c_str (), "standard__")) | |
13652 | { | |
13653 | m_encoded_name = m_encoded_name.substr (sizeof ("standard__") - 1); | |
13654 | m_standard_p = true; | |
13655 | } | |
13656 | else | |
13657 | m_standard_p = false; | |
74ccd7f5 | 13658 | |
b5ec771e PA |
13659 | /* If the name contains a ".", then the user is entering a fully |
13660 | qualified entity name, and the match must not be done in wild | |
13661 | mode. Similarly, if the user wants to complete what looks | |
13662 | like an encoded name, the match must not be done in wild | |
13663 | mode. Also, in the standard__ special case always do | |
13664 | non-wild matching. */ | |
13665 | m_wild_match_p | |
13666 | = (lookup_name.match_type () != symbol_name_match_type::FULL | |
13667 | && !m_encoded_p | |
13668 | && !m_standard_p | |
13669 | && user_name.find ('.') == std::string::npos); | |
13670 | } | |
13671 | } | |
13672 | ||
13673 | /* symbol_name_matcher_ftype method for Ada. This only handles | |
13674 | completion mode. */ | |
13675 | ||
13676 | static bool | |
13677 | ada_symbol_name_matches (const char *symbol_search_name, | |
13678 | const lookup_name_info &lookup_name, | |
a207cff2 | 13679 | completion_match_result *comp_match_res) |
74ccd7f5 | 13680 | { |
b5ec771e PA |
13681 | return lookup_name.ada ().matches (symbol_search_name, |
13682 | lookup_name.match_type (), | |
a207cff2 | 13683 | comp_match_res); |
b5ec771e PA |
13684 | } |
13685 | ||
de63c46b PA |
13686 | /* A name matcher that matches the symbol name exactly, with |
13687 | strcmp. */ | |
13688 | ||
13689 | static bool | |
13690 | literal_symbol_name_matcher (const char *symbol_search_name, | |
13691 | const lookup_name_info &lookup_name, | |
13692 | completion_match_result *comp_match_res) | |
13693 | { | |
e0802d59 | 13694 | gdb::string_view name_view = lookup_name.name (); |
de63c46b | 13695 | |
e0802d59 TT |
13696 | if (lookup_name.completion_mode () |
13697 | ? (strncmp (symbol_search_name, name_view.data (), | |
13698 | name_view.size ()) == 0) | |
13699 | : symbol_search_name == name_view) | |
de63c46b PA |
13700 | { |
13701 | if (comp_match_res != NULL) | |
13702 | comp_match_res->set_match (symbol_search_name); | |
13703 | return true; | |
13704 | } | |
13705 | else | |
13706 | return false; | |
13707 | } | |
13708 | ||
c9debfb9 | 13709 | /* Implement the "get_symbol_name_matcher" language_defn method for |
b5ec771e PA |
13710 | Ada. */ |
13711 | ||
13712 | static symbol_name_matcher_ftype * | |
13713 | ada_get_symbol_name_matcher (const lookup_name_info &lookup_name) | |
13714 | { | |
de63c46b PA |
13715 | if (lookup_name.match_type () == symbol_name_match_type::SEARCH_NAME) |
13716 | return literal_symbol_name_matcher; | |
13717 | ||
b5ec771e PA |
13718 | if (lookup_name.completion_mode ()) |
13719 | return ada_symbol_name_matches; | |
74ccd7f5 | 13720 | else |
b5ec771e PA |
13721 | { |
13722 | if (lookup_name.ada ().wild_match_p ()) | |
13723 | return do_wild_match; | |
a2cd4f14 JB |
13724 | else if (lookup_name.ada ().verbatim_p ()) |
13725 | return do_exact_match; | |
b5ec771e PA |
13726 | else |
13727 | return do_full_match; | |
13728 | } | |
74ccd7f5 JB |
13729 | } |
13730 | ||
0874fd07 AB |
13731 | /* Class representing the Ada language. */ |
13732 | ||
13733 | class ada_language : public language_defn | |
13734 | { | |
13735 | public: | |
13736 | ada_language () | |
0e25e767 | 13737 | : language_defn (language_ada) |
0874fd07 | 13738 | { /* Nothing. */ } |
5bd40f2a | 13739 | |
6f7664a9 AB |
13740 | /* See language.h. */ |
13741 | ||
13742 | const char *name () const override | |
13743 | { return "ada"; } | |
13744 | ||
13745 | /* See language.h. */ | |
13746 | ||
13747 | const char *natural_name () const override | |
13748 | { return "Ada"; } | |
13749 | ||
e171d6f1 AB |
13750 | /* See language.h. */ |
13751 | ||
13752 | const std::vector<const char *> &filename_extensions () const override | |
13753 | { | |
13754 | static const std::vector<const char *> extensions | |
13755 | = { ".adb", ".ads", ".a", ".ada", ".dg" }; | |
13756 | return extensions; | |
13757 | } | |
13758 | ||
5bd40f2a AB |
13759 | /* Print an array element index using the Ada syntax. */ |
13760 | ||
13761 | void print_array_index (struct type *index_type, | |
13762 | LONGEST index, | |
13763 | struct ui_file *stream, | |
13764 | const value_print_options *options) const override | |
13765 | { | |
13766 | struct value *index_value = val_atr (index_type, index); | |
13767 | ||
00c696a6 | 13768 | value_print (index_value, stream, options); |
5bd40f2a AB |
13769 | fprintf_filtered (stream, " => "); |
13770 | } | |
15e5fd35 AB |
13771 | |
13772 | /* Implement the "read_var_value" language_defn method for Ada. */ | |
13773 | ||
13774 | struct value *read_var_value (struct symbol *var, | |
13775 | const struct block *var_block, | |
13776 | struct frame_info *frame) const override | |
13777 | { | |
13778 | /* The only case where default_read_var_value is not sufficient | |
13779 | is when VAR is a renaming... */ | |
13780 | if (frame != nullptr) | |
13781 | { | |
13782 | const struct block *frame_block = get_frame_block (frame, NULL); | |
13783 | if (frame_block != nullptr && ada_is_renaming_symbol (var)) | |
13784 | return ada_read_renaming_var_value (var, frame_block); | |
13785 | } | |
13786 | ||
13787 | /* This is a typical case where we expect the default_read_var_value | |
13788 | function to work. */ | |
13789 | return language_defn::read_var_value (var, var_block, frame); | |
13790 | } | |
1fb314aa AB |
13791 | |
13792 | /* See language.h. */ | |
13793 | void language_arch_info (struct gdbarch *gdbarch, | |
13794 | struct language_arch_info *lai) const override | |
13795 | { | |
13796 | const struct builtin_type *builtin = builtin_type (gdbarch); | |
13797 | ||
7bea47f0 AB |
13798 | /* Helper function to allow shorter lines below. */ |
13799 | auto add = [&] (struct type *t) | |
13800 | { | |
13801 | lai->add_primitive_type (t); | |
13802 | }; | |
13803 | ||
13804 | add (arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), | |
13805 | 0, "integer")); | |
13806 | add (arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch), | |
13807 | 0, "long_integer")); | |
13808 | add (arch_integer_type (gdbarch, gdbarch_short_bit (gdbarch), | |
13809 | 0, "short_integer")); | |
13810 | struct type *char_type = arch_character_type (gdbarch, TARGET_CHAR_BIT, | |
13811 | 0, "character"); | |
13812 | lai->set_string_char_type (char_type); | |
13813 | add (char_type); | |
13814 | add (arch_float_type (gdbarch, gdbarch_float_bit (gdbarch), | |
13815 | "float", gdbarch_float_format (gdbarch))); | |
13816 | add (arch_float_type (gdbarch, gdbarch_double_bit (gdbarch), | |
13817 | "long_float", gdbarch_double_format (gdbarch))); | |
13818 | add (arch_integer_type (gdbarch, gdbarch_long_long_bit (gdbarch), | |
13819 | 0, "long_long_integer")); | |
13820 | add (arch_float_type (gdbarch, gdbarch_long_double_bit (gdbarch), | |
13821 | "long_long_float", | |
13822 | gdbarch_long_double_format (gdbarch))); | |
13823 | add (arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), | |
13824 | 0, "natural")); | |
13825 | add (arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), | |
13826 | 0, "positive")); | |
13827 | add (builtin->builtin_void); | |
13828 | ||
13829 | struct type *system_addr_ptr | |
1fb314aa AB |
13830 | = lookup_pointer_type (arch_type (gdbarch, TYPE_CODE_VOID, TARGET_CHAR_BIT, |
13831 | "void")); | |
7bea47f0 AB |
13832 | system_addr_ptr->set_name ("system__address"); |
13833 | add (system_addr_ptr); | |
1fb314aa AB |
13834 | |
13835 | /* Create the equivalent of the System.Storage_Elements.Storage_Offset | |
13836 | type. This is a signed integral type whose size is the same as | |
13837 | the size of addresses. */ | |
7bea47f0 AB |
13838 | unsigned int addr_length = TYPE_LENGTH (system_addr_ptr); |
13839 | add (arch_integer_type (gdbarch, addr_length * HOST_CHAR_BIT, 0, | |
13840 | "storage_offset")); | |
1fb314aa | 13841 | |
7bea47f0 | 13842 | lai->set_bool_type (builtin->builtin_bool); |
1fb314aa | 13843 | } |
4009ee92 AB |
13844 | |
13845 | /* See language.h. */ | |
13846 | ||
13847 | bool iterate_over_symbols | |
13848 | (const struct block *block, const lookup_name_info &name, | |
13849 | domain_enum domain, | |
13850 | gdb::function_view<symbol_found_callback_ftype> callback) const override | |
13851 | { | |
13852 | std::vector<struct block_symbol> results; | |
13853 | ||
13854 | ada_lookup_symbol_list_worker (name, block, domain, &results, 0); | |
13855 | for (block_symbol &sym : results) | |
13856 | { | |
13857 | if (!callback (&sym)) | |
13858 | return false; | |
13859 | } | |
13860 | ||
13861 | return true; | |
13862 | } | |
6f827019 AB |
13863 | |
13864 | /* See language.h. */ | |
13865 | bool sniff_from_mangled_name (const char *mangled, | |
13866 | char **out) const override | |
13867 | { | |
13868 | std::string demangled = ada_decode (mangled); | |
13869 | ||
13870 | *out = NULL; | |
13871 | ||
13872 | if (demangled != mangled && demangled[0] != '<') | |
13873 | { | |
13874 | /* Set the gsymbol language to Ada, but still return 0. | |
13875 | Two reasons for that: | |
13876 | ||
13877 | 1. For Ada, we prefer computing the symbol's decoded name | |
13878 | on the fly rather than pre-compute it, in order to save | |
13879 | memory (Ada projects are typically very large). | |
13880 | ||
13881 | 2. There are some areas in the definition of the GNAT | |
13882 | encoding where, with a bit of bad luck, we might be able | |
13883 | to decode a non-Ada symbol, generating an incorrect | |
13884 | demangled name (Eg: names ending with "TB" for instance | |
13885 | are identified as task bodies and so stripped from | |
13886 | the decoded name returned). | |
13887 | ||
13888 | Returning true, here, but not setting *DEMANGLED, helps us get | |
13889 | a little bit of the best of both worlds. Because we're last, | |
13890 | we should not affect any of the other languages that were | |
13891 | able to demangle the symbol before us; we get to correctly | |
13892 | tag Ada symbols as such; and even if we incorrectly tagged a | |
13893 | non-Ada symbol, which should be rare, any routing through the | |
13894 | Ada language should be transparent (Ada tries to behave much | |
13895 | like C/C++ with non-Ada symbols). */ | |
13896 | return true; | |
13897 | } | |
13898 | ||
13899 | return false; | |
13900 | } | |
fbfb0a46 AB |
13901 | |
13902 | /* See language.h. */ | |
13903 | ||
5399db93 | 13904 | char *demangle_symbol (const char *mangled, int options) const override |
0a50df5d AB |
13905 | { |
13906 | return ada_la_decode (mangled, options); | |
13907 | } | |
13908 | ||
13909 | /* See language.h. */ | |
13910 | ||
fbfb0a46 AB |
13911 | void print_type (struct type *type, const char *varstring, |
13912 | struct ui_file *stream, int show, int level, | |
13913 | const struct type_print_options *flags) const override | |
13914 | { | |
13915 | ada_print_type (type, varstring, stream, show, level, flags); | |
13916 | } | |
c9debfb9 | 13917 | |
53fc67f8 AB |
13918 | /* See language.h. */ |
13919 | ||
13920 | const char *word_break_characters (void) const override | |
13921 | { | |
13922 | return ada_completer_word_break_characters; | |
13923 | } | |
13924 | ||
7e56227d AB |
13925 | /* See language.h. */ |
13926 | ||
13927 | void collect_symbol_completion_matches (completion_tracker &tracker, | |
13928 | complete_symbol_mode mode, | |
13929 | symbol_name_match_type name_match_type, | |
13930 | const char *text, const char *word, | |
13931 | enum type_code code) const override | |
13932 | { | |
13933 | struct symbol *sym; | |
13934 | const struct block *b, *surrounding_static_block = 0; | |
13935 | struct block_iterator iter; | |
13936 | ||
13937 | gdb_assert (code == TYPE_CODE_UNDEF); | |
13938 | ||
13939 | lookup_name_info lookup_name (text, name_match_type, true); | |
13940 | ||
13941 | /* First, look at the partial symtab symbols. */ | |
13942 | expand_symtabs_matching (NULL, | |
13943 | lookup_name, | |
13944 | NULL, | |
13945 | NULL, | |
13946 | ALL_DOMAIN); | |
13947 | ||
13948 | /* At this point scan through the misc symbol vectors and add each | |
13949 | symbol you find to the list. Eventually we want to ignore | |
13950 | anything that isn't a text symbol (everything else will be | |
13951 | handled by the psymtab code above). */ | |
13952 | ||
13953 | for (objfile *objfile : current_program_space->objfiles ()) | |
13954 | { | |
13955 | for (minimal_symbol *msymbol : objfile->msymbols ()) | |
13956 | { | |
13957 | QUIT; | |
13958 | ||
13959 | if (completion_skip_symbol (mode, msymbol)) | |
13960 | continue; | |
13961 | ||
13962 | language symbol_language = msymbol->language (); | |
13963 | ||
13964 | /* Ada minimal symbols won't have their language set to Ada. If | |
13965 | we let completion_list_add_name compare using the | |
13966 | default/C-like matcher, then when completing e.g., symbols in a | |
13967 | package named "pck", we'd match internal Ada symbols like | |
13968 | "pckS", which are invalid in an Ada expression, unless you wrap | |
13969 | them in '<' '>' to request a verbatim match. | |
13970 | ||
13971 | Unfortunately, some Ada encoded names successfully demangle as | |
13972 | C++ symbols (using an old mangling scheme), such as "name__2Xn" | |
13973 | -> "Xn::name(void)" and thus some Ada minimal symbols end up | |
13974 | with the wrong language set. Paper over that issue here. */ | |
13975 | if (symbol_language == language_auto | |
13976 | || symbol_language == language_cplus) | |
13977 | symbol_language = language_ada; | |
13978 | ||
13979 | completion_list_add_name (tracker, | |
13980 | symbol_language, | |
13981 | msymbol->linkage_name (), | |
13982 | lookup_name, text, word); | |
13983 | } | |
13984 | } | |
13985 | ||
13986 | /* Search upwards from currently selected frame (so that we can | |
13987 | complete on local vars. */ | |
13988 | ||
13989 | for (b = get_selected_block (0); b != NULL; b = BLOCK_SUPERBLOCK (b)) | |
13990 | { | |
13991 | if (!BLOCK_SUPERBLOCK (b)) | |
13992 | surrounding_static_block = b; /* For elmin of dups */ | |
13993 | ||
13994 | ALL_BLOCK_SYMBOLS (b, iter, sym) | |
13995 | { | |
13996 | if (completion_skip_symbol (mode, sym)) | |
13997 | continue; | |
13998 | ||
13999 | completion_list_add_name (tracker, | |
14000 | sym->language (), | |
14001 | sym->linkage_name (), | |
14002 | lookup_name, text, word); | |
14003 | } | |
14004 | } | |
14005 | ||
14006 | /* Go through the symtabs and check the externs and statics for | |
14007 | symbols which match. */ | |
14008 | ||
14009 | for (objfile *objfile : current_program_space->objfiles ()) | |
14010 | { | |
14011 | for (compunit_symtab *s : objfile->compunits ()) | |
14012 | { | |
14013 | QUIT; | |
14014 | b = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (s), GLOBAL_BLOCK); | |
14015 | ALL_BLOCK_SYMBOLS (b, iter, sym) | |
14016 | { | |
14017 | if (completion_skip_symbol (mode, sym)) | |
14018 | continue; | |
14019 | ||
14020 | completion_list_add_name (tracker, | |
14021 | sym->language (), | |
14022 | sym->linkage_name (), | |
14023 | lookup_name, text, word); | |
14024 | } | |
14025 | } | |
14026 | } | |
14027 | ||
14028 | for (objfile *objfile : current_program_space->objfiles ()) | |
14029 | { | |
14030 | for (compunit_symtab *s : objfile->compunits ()) | |
14031 | { | |
14032 | QUIT; | |
14033 | b = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (s), STATIC_BLOCK); | |
14034 | /* Don't do this block twice. */ | |
14035 | if (b == surrounding_static_block) | |
14036 | continue; | |
14037 | ALL_BLOCK_SYMBOLS (b, iter, sym) | |
14038 | { | |
14039 | if (completion_skip_symbol (mode, sym)) | |
14040 | continue; | |
14041 | ||
14042 | completion_list_add_name (tracker, | |
14043 | sym->language (), | |
14044 | sym->linkage_name (), | |
14045 | lookup_name, text, word); | |
14046 | } | |
14047 | } | |
14048 | } | |
14049 | } | |
14050 | ||
f16a9f57 AB |
14051 | /* See language.h. */ |
14052 | ||
14053 | gdb::unique_xmalloc_ptr<char> watch_location_expression | |
14054 | (struct type *type, CORE_ADDR addr) const override | |
14055 | { | |
14056 | type = check_typedef (TYPE_TARGET_TYPE (check_typedef (type))); | |
14057 | std::string name = type_to_string (type); | |
14058 | return gdb::unique_xmalloc_ptr<char> | |
14059 | (xstrprintf ("{%s} %s", name.c_str (), core_addr_to_string (addr))); | |
14060 | } | |
14061 | ||
a1d1fa3e AB |
14062 | /* See language.h. */ |
14063 | ||
14064 | void value_print (struct value *val, struct ui_file *stream, | |
14065 | const struct value_print_options *options) const override | |
14066 | { | |
14067 | return ada_value_print (val, stream, options); | |
14068 | } | |
14069 | ||
ebe2334e AB |
14070 | /* See language.h. */ |
14071 | ||
14072 | void value_print_inner | |
14073 | (struct value *val, struct ui_file *stream, int recurse, | |
14074 | const struct value_print_options *options) const override | |
14075 | { | |
14076 | return ada_value_print_inner (val, stream, recurse, options); | |
14077 | } | |
14078 | ||
a78a19b1 AB |
14079 | /* See language.h. */ |
14080 | ||
14081 | struct block_symbol lookup_symbol_nonlocal | |
14082 | (const char *name, const struct block *block, | |
14083 | const domain_enum domain) const override | |
14084 | { | |
14085 | struct block_symbol sym; | |
14086 | ||
14087 | sym = ada_lookup_symbol (name, block_static_block (block), domain); | |
14088 | if (sym.symbol != NULL) | |
14089 | return sym; | |
14090 | ||
14091 | /* If we haven't found a match at this point, try the primitive | |
14092 | types. In other languages, this search is performed before | |
14093 | searching for global symbols in order to short-circuit that | |
14094 | global-symbol search if it happens that the name corresponds | |
14095 | to a primitive type. But we cannot do the same in Ada, because | |
14096 | it is perfectly legitimate for a program to declare a type which | |
14097 | has the same name as a standard type. If looking up a type in | |
14098 | that situation, we have traditionally ignored the primitive type | |
14099 | in favor of user-defined types. This is why, unlike most other | |
14100 | languages, we search the primitive types this late and only after | |
14101 | having searched the global symbols without success. */ | |
14102 | ||
14103 | if (domain == VAR_DOMAIN) | |
14104 | { | |
14105 | struct gdbarch *gdbarch; | |
14106 | ||
14107 | if (block == NULL) | |
14108 | gdbarch = target_gdbarch (); | |
14109 | else | |
14110 | gdbarch = block_gdbarch (block); | |
14111 | sym.symbol | |
14112 | = language_lookup_primitive_type_as_symbol (this, gdbarch, name); | |
14113 | if (sym.symbol != NULL) | |
14114 | return sym; | |
14115 | } | |
14116 | ||
14117 | return {}; | |
14118 | } | |
14119 | ||
87afa652 AB |
14120 | /* See language.h. */ |
14121 | ||
14122 | int parser (struct parser_state *ps) const override | |
14123 | { | |
14124 | warnings_issued = 0; | |
14125 | return ada_parse (ps); | |
14126 | } | |
14127 | ||
1bf9c363 AB |
14128 | /* See language.h. |
14129 | ||
14130 | Same as evaluate_type (*EXP), but resolves ambiguous symbol references | |
14131 | (marked by OP_VAR_VALUE nodes in which the symbol has an undefined | |
14132 | namespace) and converts operators that are user-defined into | |
14133 | appropriate function calls. If CONTEXT_TYPE is non-null, it provides | |
14134 | a preferred result type [at the moment, only type void has any | |
14135 | effect---causing procedures to be preferred over functions in calls]. | |
14136 | A null CONTEXT_TYPE indicates that a non-void return type is | |
14137 | preferred. May change (expand) *EXP. */ | |
14138 | ||
14139 | void post_parser (expression_up *expp, int void_context_p, int completing, | |
14140 | innermost_block_tracker *tracker) const override | |
14141 | { | |
14142 | struct type *context_type = NULL; | |
14143 | int pc = 0; | |
14144 | ||
14145 | if (void_context_p) | |
14146 | context_type = builtin_type ((*expp)->gdbarch)->builtin_void; | |
14147 | ||
14148 | resolve_subexp (expp, &pc, 1, context_type, completing, tracker); | |
14149 | } | |
14150 | ||
ec8cec5b AB |
14151 | /* See language.h. */ |
14152 | ||
14153 | void emitchar (int ch, struct type *chtype, | |
14154 | struct ui_file *stream, int quoter) const override | |
14155 | { | |
14156 | ada_emit_char (ch, chtype, stream, quoter, 1); | |
14157 | } | |
14158 | ||
52b50f2c AB |
14159 | /* See language.h. */ |
14160 | ||
14161 | void printchar (int ch, struct type *chtype, | |
14162 | struct ui_file *stream) const override | |
14163 | { | |
14164 | ada_printchar (ch, chtype, stream); | |
14165 | } | |
14166 | ||
d711ee67 AB |
14167 | /* See language.h. */ |
14168 | ||
14169 | void printstr (struct ui_file *stream, struct type *elttype, | |
14170 | const gdb_byte *string, unsigned int length, | |
14171 | const char *encoding, int force_ellipses, | |
14172 | const struct value_print_options *options) const override | |
14173 | { | |
14174 | ada_printstr (stream, elttype, string, length, encoding, | |
14175 | force_ellipses, options); | |
14176 | } | |
14177 | ||
4ffc13fb AB |
14178 | /* See language.h. */ |
14179 | ||
14180 | void print_typedef (struct type *type, struct symbol *new_symbol, | |
14181 | struct ui_file *stream) const override | |
14182 | { | |
14183 | ada_print_typedef (type, new_symbol, stream); | |
14184 | } | |
14185 | ||
39e7ecca AB |
14186 | /* See language.h. */ |
14187 | ||
14188 | bool is_string_type_p (struct type *type) const override | |
14189 | { | |
14190 | return ada_is_string_type (type); | |
14191 | } | |
14192 | ||
22e3f3ed AB |
14193 | /* See language.h. */ |
14194 | ||
14195 | const char *struct_too_deep_ellipsis () const override | |
14196 | { return "(...)"; } | |
39e7ecca | 14197 | |
67bd3fd5 AB |
14198 | /* See language.h. */ |
14199 | ||
14200 | bool c_style_arrays_p () const override | |
14201 | { return false; } | |
14202 | ||
d3355e4d AB |
14203 | /* See language.h. */ |
14204 | ||
14205 | bool store_sym_names_in_linkage_form_p () const override | |
14206 | { return true; } | |
14207 | ||
b63a3f3f AB |
14208 | /* See language.h. */ |
14209 | ||
14210 | const struct lang_varobj_ops *varobj_ops () const override | |
14211 | { return &ada_varobj_ops; } | |
14212 | ||
5aba6ebe AB |
14213 | /* See language.h. */ |
14214 | ||
14215 | const struct exp_descriptor *expression_ops () const override | |
14216 | { return &ada_exp_descriptor; } | |
14217 | ||
b7c6e27d AB |
14218 | /* See language.h. */ |
14219 | ||
14220 | const struct op_print *opcode_print_table () const override | |
14221 | { return ada_op_print_tab; } | |
14222 | ||
c9debfb9 AB |
14223 | protected: |
14224 | /* See language.h. */ | |
14225 | ||
14226 | symbol_name_matcher_ftype *get_symbol_name_matcher_inner | |
14227 | (const lookup_name_info &lookup_name) const override | |
14228 | { | |
14229 | return ada_get_symbol_name_matcher (lookup_name); | |
14230 | } | |
0874fd07 AB |
14231 | }; |
14232 | ||
14233 | /* Single instance of the Ada language class. */ | |
14234 | ||
14235 | static ada_language ada_language_defn; | |
14236 | ||
5bf03f13 JB |
14237 | /* Command-list for the "set/show ada" prefix command. */ |
14238 | static struct cmd_list_element *set_ada_list; | |
14239 | static struct cmd_list_element *show_ada_list; | |
14240 | ||
2060206e PA |
14241 | static void |
14242 | initialize_ada_catchpoint_ops (void) | |
14243 | { | |
14244 | struct breakpoint_ops *ops; | |
14245 | ||
14246 | initialize_breakpoint_ops (); | |
14247 | ||
14248 | ops = &catch_exception_breakpoint_ops; | |
14249 | *ops = bkpt_breakpoint_ops; | |
37f6a7f4 TT |
14250 | ops->allocate_location = allocate_location_exception; |
14251 | ops->re_set = re_set_exception; | |
14252 | ops->check_status = check_status_exception; | |
14253 | ops->print_it = print_it_exception; | |
14254 | ops->print_one = print_one_exception; | |
14255 | ops->print_mention = print_mention_exception; | |
14256 | ops->print_recreate = print_recreate_exception; | |
2060206e PA |
14257 | |
14258 | ops = &catch_exception_unhandled_breakpoint_ops; | |
14259 | *ops = bkpt_breakpoint_ops; | |
37f6a7f4 TT |
14260 | ops->allocate_location = allocate_location_exception; |
14261 | ops->re_set = re_set_exception; | |
14262 | ops->check_status = check_status_exception; | |
14263 | ops->print_it = print_it_exception; | |
14264 | ops->print_one = print_one_exception; | |
14265 | ops->print_mention = print_mention_exception; | |
14266 | ops->print_recreate = print_recreate_exception; | |
2060206e PA |
14267 | |
14268 | ops = &catch_assert_breakpoint_ops; | |
14269 | *ops = bkpt_breakpoint_ops; | |
37f6a7f4 TT |
14270 | ops->allocate_location = allocate_location_exception; |
14271 | ops->re_set = re_set_exception; | |
14272 | ops->check_status = check_status_exception; | |
14273 | ops->print_it = print_it_exception; | |
14274 | ops->print_one = print_one_exception; | |
14275 | ops->print_mention = print_mention_exception; | |
14276 | ops->print_recreate = print_recreate_exception; | |
9f757bf7 XR |
14277 | |
14278 | ops = &catch_handlers_breakpoint_ops; | |
14279 | *ops = bkpt_breakpoint_ops; | |
37f6a7f4 TT |
14280 | ops->allocate_location = allocate_location_exception; |
14281 | ops->re_set = re_set_exception; | |
14282 | ops->check_status = check_status_exception; | |
14283 | ops->print_it = print_it_exception; | |
14284 | ops->print_one = print_one_exception; | |
14285 | ops->print_mention = print_mention_exception; | |
14286 | ops->print_recreate = print_recreate_exception; | |
2060206e PA |
14287 | } |
14288 | ||
3d9434b5 JB |
14289 | /* This module's 'new_objfile' observer. */ |
14290 | ||
14291 | static void | |
14292 | ada_new_objfile_observer (struct objfile *objfile) | |
14293 | { | |
14294 | ada_clear_symbol_cache (); | |
14295 | } | |
14296 | ||
14297 | /* This module's 'free_objfile' observer. */ | |
14298 | ||
14299 | static void | |
14300 | ada_free_objfile_observer (struct objfile *objfile) | |
14301 | { | |
14302 | ada_clear_symbol_cache (); | |
14303 | } | |
14304 | ||
6c265988 | 14305 | void _initialize_ada_language (); |
d2e4a39e | 14306 | void |
6c265988 | 14307 | _initialize_ada_language () |
14f9c5c9 | 14308 | { |
2060206e PA |
14309 | initialize_ada_catchpoint_ops (); |
14310 | ||
0743fc83 TT |
14311 | add_basic_prefix_cmd ("ada", no_class, |
14312 | _("Prefix command for changing Ada-specific settings."), | |
14313 | &set_ada_list, "set ada ", 0, &setlist); | |
5bf03f13 | 14314 | |
0743fc83 TT |
14315 | add_show_prefix_cmd ("ada", no_class, |
14316 | _("Generic command for showing Ada-specific settings."), | |
14317 | &show_ada_list, "show ada ", 0, &showlist); | |
5bf03f13 JB |
14318 | |
14319 | add_setshow_boolean_cmd ("trust-PAD-over-XVS", class_obscure, | |
dda83cd7 | 14320 | &trust_pad_over_xvs, _("\ |
590042fc PW |
14321 | Enable or disable an optimization trusting PAD types over XVS types."), _("\ |
14322 | Show whether an optimization trusting PAD types over XVS types is activated."), | |
dda83cd7 | 14323 | _("\ |
5bf03f13 JB |
14324 | This is related to the encoding used by the GNAT compiler. The debugger\n\ |
14325 | should normally trust the contents of PAD types, but certain older versions\n\ | |
14326 | of GNAT have a bug that sometimes causes the information in the PAD type\n\ | |
14327 | to be incorrect. Turning this setting \"off\" allows the debugger to\n\ | |
14328 | work around this bug. It is always safe to turn this option \"off\", but\n\ | |
14329 | this incurs a slight performance penalty, so it is recommended to NOT change\n\ | |
14330 | this option to \"off\" unless necessary."), | |
dda83cd7 | 14331 | NULL, NULL, &set_ada_list, &show_ada_list); |
5bf03f13 | 14332 | |
d72413e6 PMR |
14333 | add_setshow_boolean_cmd ("print-signatures", class_vars, |
14334 | &print_signatures, _("\ | |
14335 | Enable or disable the output of formal and return types for functions in the \ | |
590042fc | 14336 | overloads selection menu."), _("\ |
d72413e6 | 14337 | Show whether the output of formal and return types for functions in the \ |
590042fc | 14338 | overloads selection menu is activated."), |
d72413e6 PMR |
14339 | NULL, NULL, NULL, &set_ada_list, &show_ada_list); |
14340 | ||
9ac4176b PA |
14341 | add_catch_command ("exception", _("\ |
14342 | Catch Ada exceptions, when raised.\n\ | |
9bf7038b | 14343 | Usage: catch exception [ARG] [if CONDITION]\n\ |
60a90376 JB |
14344 | Without any argument, stop when any Ada exception is raised.\n\ |
14345 | If ARG is \"unhandled\" (without the quotes), only stop when the exception\n\ | |
14346 | being raised does not have a handler (and will therefore lead to the task's\n\ | |
14347 | termination).\n\ | |
14348 | Otherwise, the catchpoint only stops when the name of the exception being\n\ | |
9bf7038b TT |
14349 | raised is the same as ARG.\n\ |
14350 | CONDITION is a boolean expression that is evaluated to see whether the\n\ | |
14351 | exception should cause a stop."), | |
9ac4176b | 14352 | catch_ada_exception_command, |
71bed2db | 14353 | catch_ada_completer, |
9ac4176b PA |
14354 | CATCH_PERMANENT, |
14355 | CATCH_TEMPORARY); | |
9f757bf7 XR |
14356 | |
14357 | add_catch_command ("handlers", _("\ | |
14358 | Catch Ada exceptions, when handled.\n\ | |
9bf7038b TT |
14359 | Usage: catch handlers [ARG] [if CONDITION]\n\ |
14360 | Without any argument, stop when any Ada exception is handled.\n\ | |
14361 | With an argument, catch only exceptions with the given name.\n\ | |
14362 | CONDITION is a boolean expression that is evaluated to see whether the\n\ | |
14363 | exception should cause a stop."), | |
9f757bf7 | 14364 | catch_ada_handlers_command, |
dda83cd7 | 14365 | catch_ada_completer, |
9f757bf7 XR |
14366 | CATCH_PERMANENT, |
14367 | CATCH_TEMPORARY); | |
9ac4176b PA |
14368 | add_catch_command ("assert", _("\ |
14369 | Catch failed Ada assertions, when raised.\n\ | |
9bf7038b TT |
14370 | Usage: catch assert [if CONDITION]\n\ |
14371 | CONDITION is a boolean expression that is evaluated to see whether the\n\ | |
14372 | exception should cause a stop."), | |
9ac4176b | 14373 | catch_assert_command, |
dda83cd7 | 14374 | NULL, |
9ac4176b PA |
14375 | CATCH_PERMANENT, |
14376 | CATCH_TEMPORARY); | |
14377 | ||
6c038f32 | 14378 | varsize_limit = 65536; |
3fcded8f JB |
14379 | add_setshow_uinteger_cmd ("varsize-limit", class_support, |
14380 | &varsize_limit, _("\ | |
14381 | Set the maximum number of bytes allowed in a variable-size object."), _("\ | |
14382 | Show the maximum number of bytes allowed in a variable-size object."), _("\ | |
14383 | Attempts to access an object whose size is not a compile-time constant\n\ | |
14384 | and exceeds this limit will cause an error."), | |
14385 | NULL, NULL, &setlist, &showlist); | |
6c038f32 | 14386 | |
778865d3 JB |
14387 | add_info ("exceptions", info_exceptions_command, |
14388 | _("\ | |
14389 | List all Ada exception names.\n\ | |
9bf7038b | 14390 | Usage: info exceptions [REGEXP]\n\ |
778865d3 JB |
14391 | If a regular expression is passed as an argument, only those matching\n\ |
14392 | the regular expression are listed.")); | |
14393 | ||
0743fc83 TT |
14394 | add_basic_prefix_cmd ("ada", class_maintenance, |
14395 | _("Set Ada maintenance-related variables."), | |
14396 | &maint_set_ada_cmdlist, "maintenance set ada ", | |
14397 | 0/*allow-unknown*/, &maintenance_set_cmdlist); | |
c6044dd1 | 14398 | |
0743fc83 TT |
14399 | add_show_prefix_cmd ("ada", class_maintenance, |
14400 | _("Show Ada maintenance-related variables."), | |
14401 | &maint_show_ada_cmdlist, "maintenance show ada ", | |
14402 | 0/*allow-unknown*/, &maintenance_show_cmdlist); | |
c6044dd1 JB |
14403 | |
14404 | add_setshow_boolean_cmd | |
14405 | ("ignore-descriptive-types", class_maintenance, | |
14406 | &ada_ignore_descriptive_types_p, | |
14407 | _("Set whether descriptive types generated by GNAT should be ignored."), | |
14408 | _("Show whether descriptive types generated by GNAT should be ignored."), | |
14409 | _("\ | |
14410 | When enabled, the debugger will stop using the DW_AT_GNAT_descriptive_type\n\ | |
14411 | DWARF attribute."), | |
14412 | NULL, NULL, &maint_set_ada_cmdlist, &maint_show_ada_cmdlist); | |
14413 | ||
459a2e4c TT |
14414 | decoded_names_store = htab_create_alloc (256, htab_hash_string, streq_hash, |
14415 | NULL, xcalloc, xfree); | |
6b69afc4 | 14416 | |
3d9434b5 | 14417 | /* The ada-lang observers. */ |
76727919 TT |
14418 | gdb::observers::new_objfile.attach (ada_new_objfile_observer); |
14419 | gdb::observers::free_objfile.attach (ada_free_objfile_observer); | |
14420 | gdb::observers::inferior_exit.attach (ada_inferior_exit); | |
14f9c5c9 | 14421 | } |