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c44af4eb TT |
1 | /* Rust language support routines for GDB, the GNU debugger. |
2 | ||
b811d2c2 | 3 | Copyright (C) 2016-2020 Free Software Foundation, Inc. |
c44af4eb TT |
4 | |
5 | This file is part of GDB. | |
6 | ||
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. | |
11 | ||
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. | |
16 | ||
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/>. */ | |
19 | ||
20 | #include "defs.h" | |
21 | ||
22 | #include <ctype.h> | |
23 | ||
24 | #include "block.h" | |
25 | #include "c-lang.h" | |
26 | #include "charset.h" | |
27 | #include "cp-support.h" | |
8b302db8 | 28 | #include "demangle.h" |
c44af4eb TT |
29 | #include "gdbarch.h" |
30 | #include "infcall.h" | |
31 | #include "objfiles.h" | |
71a3c369 | 32 | #include "psymtab.h" |
c44af4eb | 33 | #include "rust-lang.h" |
a33ccfc7 | 34 | #include "typeprint.h" |
c44af4eb TT |
35 | #include "valprint.h" |
36 | #include "varobj.h" | |
a33ccfc7 | 37 | #include <algorithm> |
ab8b80a8 TT |
38 | #include <string> |
39 | #include <vector> | |
7f6aba03 | 40 | #include "cli/cli-style.h" |
c44af4eb | 41 | |
c9317f21 | 42 | /* See rust-lang.h. */ |
c44af4eb | 43 | |
c9317f21 TT |
44 | const char * |
45 | rust_last_path_segment (const char *path) | |
c44af4eb TT |
46 | { |
47 | const char *result = strrchr (path, ':'); | |
48 | ||
49 | if (result == NULL) | |
c9317f21 | 50 | return path; |
c44af4eb TT |
51 | return result + 1; |
52 | } | |
53 | ||
03c85b11 | 54 | /* See rust-lang.h. */ |
c44af4eb | 55 | |
03c85b11 | 56 | std::string |
c44af4eb TT |
57 | rust_crate_for_block (const struct block *block) |
58 | { | |
59 | const char *scope = block_scope (block); | |
60 | ||
61 | if (scope[0] == '\0') | |
03c85b11 | 62 | return std::string (); |
c44af4eb | 63 | |
03c85b11 | 64 | return std::string (scope, cp_find_first_component (scope)); |
c44af4eb TT |
65 | } |
66 | ||
c9317f21 TT |
67 | /* Return true if TYPE, which must be a struct type, represents a Rust |
68 | enum. */ | |
c44af4eb | 69 | |
b96645f1 | 70 | static bool |
c9317f21 | 71 | rust_enum_p (const struct type *type) |
b96645f1 | 72 | { |
c9317f21 TT |
73 | return (TYPE_CODE (type) == TYPE_CODE_STRUCT |
74 | && TYPE_NFIELDS (type) == 1 | |
75 | && TYPE_FLAG_DISCRIMINATED_UNION (TYPE_FIELD_TYPE (type, 0))); | |
b96645f1 MG |
76 | } |
77 | ||
098b2108 TT |
78 | /* Return true if TYPE, which must be an enum type, has no |
79 | variants. */ | |
80 | ||
81 | static bool | |
82 | rust_empty_enum_p (const struct type *type) | |
83 | { | |
84 | gdb_assert (rust_enum_p (type)); | |
85 | /* In Rust the enum always fills the containing structure. */ | |
86 | gdb_assert (TYPE_FIELD_BITPOS (type, 0) == 0); | |
87 | ||
88 | return TYPE_NFIELDS (TYPE_FIELD_TYPE (type, 0)) == 0; | |
89 | } | |
90 | ||
c9317f21 | 91 | /* Given an enum type and contents, find which variant is active. */ |
c44af4eb | 92 | |
098b2108 | 93 | static struct field * |
c9317f21 | 94 | rust_enum_variant (struct type *type, const gdb_byte *contents) |
c44af4eb | 95 | { |
c9317f21 TT |
96 | /* In Rust the enum always fills the containing structure. */ |
97 | gdb_assert (TYPE_FIELD_BITPOS (type, 0) == 0); | |
c44af4eb | 98 | |
c9317f21 | 99 | struct type *union_type = TYPE_FIELD_TYPE (type, 0); |
c44af4eb | 100 | |
c9317f21 TT |
101 | int fieldno = value_union_variant (union_type, contents); |
102 | return &TYPE_FIELD (union_type, fieldno); | |
c44af4eb TT |
103 | } |
104 | ||
105 | /* See rust-lang.h. */ | |
106 | ||
65c40c95 | 107 | bool |
c44af4eb TT |
108 | rust_tuple_type_p (struct type *type) |
109 | { | |
110 | /* The current implementation is a bit of a hack, but there's | |
111 | nothing else in the debuginfo to distinguish a tuple from a | |
112 | struct. */ | |
113 | return (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
e86ca25f TT |
114 | && TYPE_NAME (type) != NULL |
115 | && TYPE_NAME (type)[0] == '('); | |
c44af4eb TT |
116 | } |
117 | ||
c44af4eb | 118 | /* Return true if all non-static fields of a structlike type are in a |
c9317f21 | 119 | sequence like __0, __1, __2. */ |
c44af4eb | 120 | |
65c40c95 | 121 | static bool |
c9317f21 | 122 | rust_underscore_fields (struct type *type) |
c44af4eb TT |
123 | { |
124 | int i, field_number; | |
125 | ||
126 | field_number = 0; | |
127 | ||
128 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT) | |
65c40c95 | 129 | return false; |
c44af4eb TT |
130 | for (i = 0; i < TYPE_NFIELDS (type); ++i) |
131 | { | |
132 | if (!field_is_static (&TYPE_FIELD (type, i))) | |
133 | { | |
c9317f21 | 134 | char buf[20]; |
c44af4eb | 135 | |
c9317f21 TT |
136 | xsnprintf (buf, sizeof (buf), "__%d", field_number); |
137 | if (strcmp (buf, TYPE_FIELD_NAME (type, i)) != 0) | |
138 | return false; | |
139 | field_number++; | |
c44af4eb TT |
140 | } |
141 | } | |
65c40c95 | 142 | return true; |
c44af4eb TT |
143 | } |
144 | ||
145 | /* See rust-lang.h. */ | |
146 | ||
65c40c95 | 147 | bool |
c44af4eb TT |
148 | rust_tuple_struct_type_p (struct type *type) |
149 | { | |
12df5c00 TT |
150 | /* This is just an approximation until DWARF can represent Rust more |
151 | precisely. We exclude zero-length structs because they may not | |
152 | be tuple structs, and there's no way to tell. */ | |
c9317f21 | 153 | return TYPE_NFIELDS (type) > 0 && rust_underscore_fields (type); |
c44af4eb TT |
154 | } |
155 | ||
156 | /* Return true if TYPE is a slice type, otherwise false. */ | |
157 | ||
65c40c95 | 158 | static bool |
c44af4eb TT |
159 | rust_slice_type_p (struct type *type) |
160 | { | |
161 | return (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
e86ca25f TT |
162 | && TYPE_NAME (type) != NULL |
163 | && (strncmp (TYPE_NAME (type), "&[", 2) == 0 | |
164 | || strcmp (TYPE_NAME (type), "&str") == 0)); | |
c44af4eb TT |
165 | } |
166 | ||
167 | /* Return true if TYPE is a range type, otherwise false. */ | |
168 | ||
65c40c95 | 169 | static bool |
c44af4eb TT |
170 | rust_range_type_p (struct type *type) |
171 | { | |
172 | int i; | |
173 | ||
174 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT | |
175 | || TYPE_NFIELDS (type) > 2 | |
e86ca25f TT |
176 | || TYPE_NAME (type) == NULL |
177 | || strstr (TYPE_NAME (type), "::Range") == NULL) | |
65c40c95 | 178 | return false; |
c44af4eb TT |
179 | |
180 | if (TYPE_NFIELDS (type) == 0) | |
65c40c95 | 181 | return true; |
c44af4eb TT |
182 | |
183 | i = 0; | |
184 | if (strcmp (TYPE_FIELD_NAME (type, 0), "start") == 0) | |
185 | { | |
186 | if (TYPE_NFIELDS (type) == 1) | |
65c40c95 | 187 | return true; |
c44af4eb TT |
188 | i = 1; |
189 | } | |
190 | else if (TYPE_NFIELDS (type) == 2) | |
191 | { | |
192 | /* First field had to be "start". */ | |
65c40c95 | 193 | return false; |
c44af4eb TT |
194 | } |
195 | ||
196 | return strcmp (TYPE_FIELD_NAME (type, i), "end") == 0; | |
197 | } | |
198 | ||
6873858b TT |
199 | /* Return true if TYPE is an inclusive range type, otherwise false. |
200 | This is only valid for types which are already known to be range | |
201 | types. */ | |
202 | ||
203 | static bool | |
204 | rust_inclusive_range_type_p (struct type *type) | |
205 | { | |
e86ca25f TT |
206 | return (strstr (TYPE_NAME (type), "::RangeInclusive") != NULL |
207 | || strstr (TYPE_NAME (type), "::RangeToInclusive") != NULL); | |
6873858b TT |
208 | } |
209 | ||
c44af4eb TT |
210 | /* Return true if TYPE seems to be the type "u8", otherwise false. */ |
211 | ||
65c40c95 | 212 | static bool |
c44af4eb TT |
213 | rust_u8_type_p (struct type *type) |
214 | { | |
215 | return (TYPE_CODE (type) == TYPE_CODE_INT | |
216 | && TYPE_UNSIGNED (type) | |
217 | && TYPE_LENGTH (type) == 1); | |
218 | } | |
219 | ||
220 | /* Return true if TYPE is a Rust character type. */ | |
221 | ||
65c40c95 | 222 | static bool |
c44af4eb TT |
223 | rust_chartype_p (struct type *type) |
224 | { | |
225 | return (TYPE_CODE (type) == TYPE_CODE_CHAR | |
226 | && TYPE_LENGTH (type) == 4 | |
227 | && TYPE_UNSIGNED (type)); | |
228 | } | |
229 | ||
4be290b2 AB |
230 | /* Return true if TYPE is a string type. */ |
231 | ||
232 | static bool | |
233 | rust_is_string_type_p (struct type *type) | |
234 | { | |
235 | LONGEST low_bound, high_bound; | |
236 | ||
237 | type = check_typedef (type); | |
238 | return ((TYPE_CODE (type) == TYPE_CODE_STRING) | |
239 | || (TYPE_CODE (type) == TYPE_CODE_PTR | |
240 | && (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_ARRAY | |
241 | && rust_u8_type_p (TYPE_TARGET_TYPE (TYPE_TARGET_TYPE (type))) | |
242 | && get_array_bounds (TYPE_TARGET_TYPE (type), &low_bound, | |
243 | &high_bound))) | |
244 | || (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
245 | && !rust_enum_p (type) | |
246 | && rust_slice_type_p (type) | |
247 | && strcmp (TYPE_NAME (type), "&str") == 0)); | |
248 | } | |
249 | ||
71a3c369 TT |
250 | /* If VALUE represents a trait object pointer, return the underlying |
251 | pointer with the correct (i.e., runtime) type. Otherwise, return | |
252 | NULL. */ | |
253 | ||
254 | static struct value * | |
255 | rust_get_trait_object_pointer (struct value *value) | |
256 | { | |
257 | struct type *type = check_typedef (value_type (value)); | |
258 | ||
259 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) | |
260 | return NULL; | |
261 | ||
262 | /* Try to be a bit resilient if the ABI changes. */ | |
263 | int vtable_field = 0; | |
264 | for (int i = 0; i < 2; ++i) | |
265 | { | |
266 | if (strcmp (TYPE_FIELD_NAME (type, i), "vtable") == 0) | |
267 | vtable_field = i; | |
268 | else if (strcmp (TYPE_FIELD_NAME (type, i), "pointer") != 0) | |
269 | return NULL; | |
270 | } | |
271 | ||
272 | CORE_ADDR vtable = value_as_address (value_field (value, vtable_field)); | |
273 | struct symbol *symbol = find_symbol_at_address (vtable); | |
cf724bc9 | 274 | if (symbol == NULL || symbol->subclass != SYMBOL_RUST_VTABLE) |
71a3c369 TT |
275 | return NULL; |
276 | ||
277 | struct rust_vtable_symbol *vtable_sym | |
278 | = static_cast<struct rust_vtable_symbol *> (symbol); | |
279 | struct type *pointer_type = lookup_pointer_type (vtable_sym->concrete_type); | |
280 | return value_cast (pointer_type, value_field (value, 1 - vtable_field)); | |
281 | } | |
282 | ||
c44af4eb TT |
283 | \f |
284 | ||
285 | /* la_emitchar implementation for Rust. */ | |
286 | ||
287 | static void | |
288 | rust_emitchar (int c, struct type *type, struct ui_file *stream, int quoter) | |
289 | { | |
290 | if (!rust_chartype_p (type)) | |
291 | generic_emit_char (c, type, stream, quoter, | |
292 | target_charset (get_type_arch (type))); | |
293 | else if (c == '\\' || c == quoter) | |
294 | fprintf_filtered (stream, "\\%c", c); | |
295 | else if (c == '\n') | |
296 | fputs_filtered ("\\n", stream); | |
297 | else if (c == '\r') | |
298 | fputs_filtered ("\\r", stream); | |
299 | else if (c == '\t') | |
300 | fputs_filtered ("\\t", stream); | |
301 | else if (c == '\0') | |
302 | fputs_filtered ("\\0", stream); | |
303 | else if (c >= 32 && c <= 127 && isprint (c)) | |
304 | fputc_filtered (c, stream); | |
305 | else if (c <= 255) | |
306 | fprintf_filtered (stream, "\\x%02x", c); | |
307 | else | |
308 | fprintf_filtered (stream, "\\u{%06x}", c); | |
309 | } | |
310 | ||
311 | /* la_printchar implementation for Rust. */ | |
312 | ||
313 | static void | |
314 | rust_printchar (int c, struct type *type, struct ui_file *stream) | |
315 | { | |
316 | fputs_filtered ("'", stream); | |
317 | LA_EMIT_CHAR (c, type, stream, '\''); | |
318 | fputs_filtered ("'", stream); | |
319 | } | |
320 | ||
321 | /* la_printstr implementation for Rust. */ | |
322 | ||
323 | static void | |
324 | rust_printstr (struct ui_file *stream, struct type *type, | |
325 | const gdb_byte *string, unsigned int length, | |
326 | const char *user_encoding, int force_ellipses, | |
327 | const struct value_print_options *options) | |
328 | { | |
329 | /* Rust always uses UTF-8, but let the caller override this if need | |
330 | be. */ | |
331 | const char *encoding = user_encoding; | |
332 | if (user_encoding == NULL || !*user_encoding) | |
333 | { | |
334 | /* In Rust strings, characters are "u8". */ | |
335 | if (rust_u8_type_p (type)) | |
336 | encoding = "UTF-8"; | |
337 | else | |
338 | { | |
339 | /* This is probably some C string, so let's let C deal with | |
340 | it. */ | |
341 | c_printstr (stream, type, string, length, user_encoding, | |
342 | force_ellipses, options); | |
343 | return; | |
344 | } | |
345 | } | |
346 | ||
347 | /* This is not ideal as it doesn't use our character printer. */ | |
348 | generic_printstr (stream, type, string, length, encoding, force_ellipses, | |
349 | '"', 0, options); | |
350 | } | |
351 | ||
352 | \f | |
353 | ||
45320ffa TT |
354 | /* Helper function to print a string slice. */ |
355 | ||
356 | static void | |
357 | rust_val_print_str (struct ui_file *stream, struct value *val, | |
358 | const struct value_print_options *options) | |
359 | { | |
360 | struct value *base = value_struct_elt (&val, NULL, "data_ptr", NULL, | |
361 | "slice"); | |
362 | struct value *len = value_struct_elt (&val, NULL, "length", NULL, "slice"); | |
363 | ||
364 | val_print_string (TYPE_TARGET_TYPE (value_type (base)), "UTF-8", | |
365 | value_as_address (base), value_as_long (len), stream, | |
366 | options); | |
367 | } | |
368 | ||
c9317f21 | 369 | /* rust_val_print helper for structs and untagged unions. */ |
b96645f1 MG |
370 | |
371 | static void | |
e8b24d9f YQ |
372 | val_print_struct (struct type *type, int embedded_offset, |
373 | CORE_ADDR address, struct ui_file *stream, | |
374 | int recurse, struct value *val, | |
20955dbf | 375 | const struct value_print_options *options) |
b96645f1 MG |
376 | { |
377 | int i; | |
378 | int first_field; | |
45320ffa TT |
379 | |
380 | if (rust_slice_type_p (type) && strcmp (TYPE_NAME (type), "&str") == 0) | |
381 | { | |
80062eb9 AB |
382 | /* If what we are printing here is actually a string within a |
383 | structure then VAL will be the original parent value, while TYPE | |
384 | will be the type of the structure representing the string we want | |
385 | to print. | |
386 | However, RUST_VAL_PRINT_STR looks up the fields of the string | |
387 | inside VAL, assuming that VAL is the string. | |
388 | So, recreate VAL as a value representing just the string. */ | |
389 | val = value_at_lazy (type, value_address (val) + embedded_offset); | |
45320ffa TT |
390 | rust_val_print_str (stream, val, options); |
391 | return; | |
392 | } | |
393 | ||
65c40c95 TT |
394 | bool is_tuple = rust_tuple_type_p (type); |
395 | bool is_tuple_struct = !is_tuple && rust_tuple_struct_type_p (type); | |
b96645f1 MG |
396 | struct value_print_options opts; |
397 | ||
398 | if (!is_tuple) | |
399 | { | |
e86ca25f TT |
400 | if (TYPE_NAME (type) != NULL) |
401 | fprintf_filtered (stream, "%s", TYPE_NAME (type)); | |
b96645f1 MG |
402 | |
403 | if (TYPE_NFIELDS (type) == 0) | |
404 | return; | |
405 | ||
e86ca25f | 406 | if (TYPE_NAME (type) != NULL) |
b96645f1 MG |
407 | fputs_filtered (" ", stream); |
408 | } | |
409 | ||
410 | if (is_tuple || is_tuple_struct) | |
411 | fputs_filtered ("(", stream); | |
412 | else | |
413 | fputs_filtered ("{", stream); | |
414 | ||
415 | opts = *options; | |
416 | opts.deref_ref = 0; | |
417 | ||
418 | first_field = 1; | |
419 | for (i = 0; i < TYPE_NFIELDS (type); ++i) | |
420 | { | |
421 | if (field_is_static (&TYPE_FIELD (type, i))) | |
422 | continue; | |
423 | ||
424 | if (!first_field) | |
425 | fputs_filtered (",", stream); | |
426 | ||
427 | if (options->prettyformat) | |
428 | { | |
b50f188d TT |
429 | fputs_filtered ("\n", stream); |
430 | print_spaces_filtered (2 + 2 * recurse, stream); | |
b96645f1 MG |
431 | } |
432 | else if (!first_field) | |
433 | fputs_filtered (" ", stream); | |
434 | ||
435 | first_field = 0; | |
436 | ||
437 | if (!is_tuple && !is_tuple_struct) | |
438 | { | |
b50f188d TT |
439 | fputs_filtered (TYPE_FIELD_NAME (type, i), stream); |
440 | fputs_filtered (": ", stream); | |
b96645f1 MG |
441 | } |
442 | ||
443 | val_print (TYPE_FIELD_TYPE (type, i), | |
b50f188d TT |
444 | embedded_offset + TYPE_FIELD_BITPOS (type, i) / 8, |
445 | address, | |
446 | stream, recurse + 1, val, &opts, | |
447 | current_language); | |
b96645f1 MG |
448 | } |
449 | ||
450 | if (options->prettyformat) | |
451 | { | |
452 | fputs_filtered ("\n", stream); | |
453 | print_spaces_filtered (2 * recurse, stream); | |
454 | } | |
455 | ||
456 | if (is_tuple || is_tuple_struct) | |
457 | fputs_filtered (")", stream); | |
458 | else | |
459 | fputs_filtered ("}", stream); | |
460 | } | |
461 | ||
c9317f21 TT |
462 | /* rust_val_print helper for discriminated unions (Rust enums). */ |
463 | ||
464 | static void | |
465 | rust_print_enum (struct type *type, int embedded_offset, | |
466 | CORE_ADDR address, struct ui_file *stream, | |
467 | int recurse, struct value *val, | |
468 | const struct value_print_options *options) | |
469 | { | |
470 | struct value_print_options opts = *options; | |
471 | ||
472 | opts.deref_ref = 0; | |
473 | ||
098b2108 TT |
474 | if (rust_empty_enum_p (type)) |
475 | { | |
476 | /* Print the enum type name here to be more clear. */ | |
7f6aba03 TT |
477 | fprintf_filtered (stream, _("%s {%p[<No data fields>%p]}"), |
478 | TYPE_NAME (type), | |
479 | metadata_style.style ().ptr (), nullptr); | |
098b2108 TT |
480 | return; |
481 | } | |
482 | ||
c9317f21 | 483 | const gdb_byte *valaddr = value_contents_for_printing (val); |
08410482 DE |
484 | struct field *variant_field = rust_enum_variant (type, |
485 | valaddr + embedded_offset); | |
c9317f21 TT |
486 | embedded_offset += FIELD_BITPOS (*variant_field) / 8; |
487 | struct type *variant_type = FIELD_TYPE (*variant_field); | |
488 | ||
489 | int nfields = TYPE_NFIELDS (variant_type); | |
490 | ||
491 | bool is_tuple = rust_tuple_struct_type_p (variant_type); | |
492 | ||
493 | fprintf_filtered (stream, "%s", TYPE_NAME (variant_type)); | |
494 | if (nfields == 0) | |
495 | { | |
496 | /* In case of a nullary variant like 'None', just output | |
497 | the name. */ | |
498 | return; | |
499 | } | |
500 | ||
501 | /* In case of a non-nullary variant, we output 'Foo(x,y,z)'. */ | |
502 | if (is_tuple) | |
503 | fprintf_filtered (stream, "("); | |
504 | else | |
505 | { | |
506 | /* struct variant. */ | |
507 | fprintf_filtered (stream, "{"); | |
508 | } | |
509 | ||
510 | bool first_field = true; | |
511 | for (int j = 0; j < TYPE_NFIELDS (variant_type); j++) | |
512 | { | |
513 | if (!first_field) | |
514 | fputs_filtered (", ", stream); | |
515 | first_field = false; | |
516 | ||
517 | if (!is_tuple) | |
518 | fprintf_filtered (stream, "%s: ", | |
519 | TYPE_FIELD_NAME (variant_type, j)); | |
520 | ||
521 | val_print (TYPE_FIELD_TYPE (variant_type, j), | |
522 | (embedded_offset | |
523 | + TYPE_FIELD_BITPOS (variant_type, j) / 8), | |
524 | address, | |
525 | stream, recurse + 1, val, &opts, | |
526 | current_language); | |
527 | } | |
528 | ||
529 | if (is_tuple) | |
530 | fputs_filtered (")", stream); | |
531 | else | |
532 | fputs_filtered ("}", stream); | |
533 | } | |
534 | ||
c44af4eb TT |
535 | static const struct generic_val_print_decorations rust_decorations = |
536 | { | |
537 | /* Complex isn't used in Rust, but we provide C-ish values just in | |
538 | case. */ | |
539 | "", | |
540 | " + ", | |
541 | " * I", | |
542 | "true", | |
543 | "false", | |
921d8f54 | 544 | "()", |
c44af4eb TT |
545 | "[", |
546 | "]" | |
547 | }; | |
548 | ||
549 | /* la_val_print implementation for Rust. */ | |
550 | ||
551 | static void | |
e8b24d9f | 552 | rust_val_print (struct type *type, int embedded_offset, |
c44af4eb | 553 | CORE_ADDR address, struct ui_file *stream, int recurse, |
e8b24d9f | 554 | struct value *val, |
c44af4eb TT |
555 | const struct value_print_options *options) |
556 | { | |
e8b24d9f YQ |
557 | const gdb_byte *valaddr = value_contents_for_printing (val); |
558 | ||
c44af4eb TT |
559 | type = check_typedef (type); |
560 | switch (TYPE_CODE (type)) | |
561 | { | |
562 | case TYPE_CODE_PTR: | |
563 | { | |
564 | LONGEST low_bound, high_bound; | |
565 | ||
566 | if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_ARRAY | |
567 | && rust_u8_type_p (TYPE_TARGET_TYPE (TYPE_TARGET_TYPE (type))) | |
568 | && get_array_bounds (TYPE_TARGET_TYPE (type), &low_bound, | |
569 | &high_bound)) { | |
570 | /* We have a pointer to a byte string, so just print | |
571 | that. */ | |
572 | struct type *elttype = check_typedef (TYPE_TARGET_TYPE (type)); | |
573 | CORE_ADDR addr; | |
574 | struct gdbarch *arch = get_type_arch (type); | |
575 | int unit_size = gdbarch_addressable_memory_unit_size (arch); | |
576 | ||
577 | addr = unpack_pointer (type, valaddr + embedded_offset * unit_size); | |
578 | if (options->addressprint) | |
579 | { | |
580 | fputs_filtered (paddress (arch, addr), stream); | |
581 | fputs_filtered (" ", stream); | |
582 | } | |
583 | ||
584 | fputs_filtered ("b", stream); | |
585 | val_print_string (TYPE_TARGET_TYPE (elttype), "ASCII", addr, | |
586 | high_bound - low_bound + 1, stream, | |
587 | options); | |
588 | break; | |
589 | } | |
590 | } | |
591 | /* Fall through. */ | |
592 | ||
593 | case TYPE_CODE_METHODPTR: | |
594 | case TYPE_CODE_MEMBERPTR: | |
e8b24d9f | 595 | c_val_print (type, embedded_offset, address, stream, |
c44af4eb TT |
596 | recurse, val, options); |
597 | break; | |
598 | ||
599 | case TYPE_CODE_INT: | |
600 | /* Recognize the unit type. */ | |
601 | if (TYPE_UNSIGNED (type) && TYPE_LENGTH (type) == 0 | |
602 | && TYPE_NAME (type) != NULL && strcmp (TYPE_NAME (type), "()") == 0) | |
603 | { | |
604 | fputs_filtered ("()", stream); | |
605 | break; | |
606 | } | |
607 | goto generic_print; | |
608 | ||
609 | case TYPE_CODE_STRING: | |
610 | { | |
611 | struct gdbarch *arch = get_type_arch (type); | |
612 | int unit_size = gdbarch_addressable_memory_unit_size (arch); | |
613 | LONGEST low_bound, high_bound; | |
614 | ||
615 | if (!get_array_bounds (type, &low_bound, &high_bound)) | |
616 | error (_("Could not determine the array bounds")); | |
617 | ||
618 | /* If we see a plain TYPE_CODE_STRING, then we're printing a | |
619 | byte string, hence the choice of "ASCII" as the | |
620 | encoding. */ | |
621 | fputs_filtered ("b", stream); | |
622 | rust_printstr (stream, TYPE_TARGET_TYPE (type), | |
623 | valaddr + embedded_offset * unit_size, | |
624 | high_bound - low_bound + 1, "ASCII", 0, options); | |
625 | } | |
626 | break; | |
627 | ||
628 | case TYPE_CODE_ARRAY: | |
629 | { | |
630 | LONGEST low_bound, high_bound; | |
631 | ||
632 | if (get_array_bounds (type, &low_bound, &high_bound) | |
633 | && high_bound - low_bound + 1 == 0) | |
634 | fputs_filtered ("[]", stream); | |
635 | else | |
636 | goto generic_print; | |
637 | } | |
638 | break; | |
639 | ||
640 | case TYPE_CODE_UNION: | |
c9317f21 TT |
641 | /* Untagged unions are printed as if they are structs. Since |
642 | the field bit positions overlap in the debuginfo, the code | |
643 | for printing a union is same as that for a struct, the only | |
644 | difference is that the input type will have overlapping | |
645 | fields. */ | |
646 | val_print_struct (type, embedded_offset, address, stream, | |
647 | recurse, val, options); | |
c44af4eb TT |
648 | break; |
649 | ||
650 | case TYPE_CODE_STRUCT: | |
c9317f21 TT |
651 | if (rust_enum_p (type)) |
652 | rust_print_enum (type, embedded_offset, address, stream, | |
653 | recurse, val, options); | |
654 | else | |
655 | val_print_struct (type, embedded_offset, address, stream, | |
656 | recurse, val, options); | |
b96645f1 | 657 | break; |
c44af4eb | 658 | |
b96645f1 MG |
659 | default: |
660 | generic_print: | |
661 | /* Nothing special yet. */ | |
e8b24d9f | 662 | generic_val_print (type, embedded_offset, address, stream, |
b96645f1 MG |
663 | recurse, val, options, &rust_decorations); |
664 | } | |
665 | } | |
c44af4eb | 666 | |
b96645f1 | 667 | \f |
c44af4eb | 668 | |
b96645f1 | 669 | static void |
c9317f21 TT |
670 | rust_internal_print_type (struct type *type, const char *varstring, |
671 | struct ui_file *stream, int show, int level, | |
672 | const struct type_print_options *flags, | |
a33ccfc7 | 673 | bool for_rust_enum, print_offset_data *podata); |
b96645f1 MG |
674 | |
675 | /* Print a struct or union typedef. */ | |
676 | static void | |
677 | rust_print_struct_def (struct type *type, const char *varstring, | |
b50f188d | 678 | struct ui_file *stream, int show, int level, |
c9317f21 | 679 | const struct type_print_options *flags, |
a33ccfc7 | 680 | bool for_rust_enum, print_offset_data *podata) |
b96645f1 | 681 | { |
b50f188d TT |
682 | /* Print a tuple type simply. */ |
683 | if (rust_tuple_type_p (type)) | |
684 | { | |
e86ca25f | 685 | fputs_filtered (TYPE_NAME (type), stream); |
b50f188d TT |
686 | return; |
687 | } | |
c44af4eb | 688 | |
b50f188d TT |
689 | /* If we see a base class, delegate to C. */ |
690 | if (TYPE_N_BASECLASSES (type) > 0) | |
691 | c_print_type (type, varstring, stream, show, level, flags); | |
c44af4eb | 692 | |
a33ccfc7 TT |
693 | if (flags->print_offsets) |
694 | { | |
695 | /* Temporarily bump the level so that the output lines up | |
696 | correctly. */ | |
697 | level += 2; | |
698 | } | |
699 | ||
c9317f21 TT |
700 | /* Compute properties of TYPE here because, in the enum case, the |
701 | rest of the code ends up looking only at the variant part. */ | |
e86ca25f | 702 | const char *tagname = TYPE_NAME (type); |
c9317f21 TT |
703 | bool is_tuple_struct = rust_tuple_struct_type_p (type); |
704 | bool is_tuple = rust_tuple_type_p (type); | |
705 | bool is_enum = rust_enum_p (type); | |
b96645f1 | 706 | |
c9317f21 TT |
707 | int enum_discriminant_index = -1; |
708 | ||
709 | if (for_rust_enum) | |
710 | { | |
711 | /* Already printing an outer enum, so nothing to print here. */ | |
712 | } | |
713 | else | |
714 | { | |
715 | /* This code path is also used by unions and enums. */ | |
716 | if (is_enum) | |
717 | { | |
718 | fputs_filtered ("enum ", stream); | |
098b2108 TT |
719 | |
720 | if (rust_empty_enum_p (type)) | |
721 | { | |
722 | if (tagname != NULL) | |
723 | { | |
724 | fputs_filtered (tagname, stream); | |
725 | fputs_filtered (" ", stream); | |
726 | } | |
727 | fputs_filtered ("{}", stream); | |
728 | return; | |
729 | } | |
730 | ||
c9317f21 TT |
731 | type = TYPE_FIELD_TYPE (type, 0); |
732 | ||
733 | struct dynamic_prop *discriminant_prop | |
734 | = get_dyn_prop (DYN_PROP_DISCRIMINATED, type); | |
735 | struct discriminant_info *info | |
736 | = (struct discriminant_info *) discriminant_prop->data.baton; | |
737 | enum_discriminant_index = info->discriminant_index; | |
738 | } | |
c9317f21 TT |
739 | else if (TYPE_CODE (type) == TYPE_CODE_STRUCT) |
740 | fputs_filtered ("struct ", stream); | |
741 | else | |
742 | fputs_filtered ("union ", stream); | |
b96645f1 | 743 | |
c9317f21 TT |
744 | if (tagname != NULL) |
745 | fputs_filtered (tagname, stream); | |
746 | } | |
b96645f1 | 747 | |
c9317f21 | 748 | if (TYPE_NFIELDS (type) == 0 && !is_tuple) |
b50f188d | 749 | return; |
a33ccfc7 | 750 | if (for_rust_enum && !flags->print_offsets) |
c9317f21 TT |
751 | fputs_filtered (is_tuple_struct ? "(" : "{", stream); |
752 | else | |
753 | fputs_filtered (is_tuple_struct ? " (\n" : " {\n", stream); | |
c44af4eb | 754 | |
a33ccfc7 TT |
755 | /* When printing offsets, we rearrange the fields into storage |
756 | order. This lets us show holes more clearly. We work using | |
757 | field indices here because it simplifies calls to | |
758 | print_offset_data::update below. */ | |
759 | std::vector<int> fields; | |
c9317f21 | 760 | for (int i = 0; i < TYPE_NFIELDS (type); ++i) |
b50f188d | 761 | { |
b50f188d TT |
762 | if (field_is_static (&TYPE_FIELD (type, i))) |
763 | continue; | |
a33ccfc7 TT |
764 | if (is_enum && i == enum_discriminant_index) |
765 | continue; | |
766 | fields.push_back (i); | |
767 | } | |
768 | if (flags->print_offsets) | |
769 | std::sort (fields.begin (), fields.end (), | |
770 | [&] (int a, int b) | |
771 | { | |
772 | return (TYPE_FIELD_BITPOS (type, a) | |
773 | < TYPE_FIELD_BITPOS (type, b)); | |
774 | }); | |
775 | ||
776 | for (int i : fields) | |
777 | { | |
778 | QUIT; | |
779 | ||
780 | gdb_assert (!field_is_static (&TYPE_FIELD (type, i))); | |
781 | gdb_assert (! (is_enum && i == enum_discriminant_index)); | |
782 | ||
783 | if (flags->print_offsets) | |
784 | podata->update (type, i, stream); | |
b50f188d TT |
785 | |
786 | /* We'd like to print "pub" here as needed, but rustc | |
787 | doesn't emit the debuginfo, and our types don't have | |
788 | cplus_struct_type attached. */ | |
789 | ||
790 | /* For a tuple struct we print the type but nothing | |
791 | else. */ | |
a33ccfc7 | 792 | if (!for_rust_enum || flags->print_offsets) |
c9317f21 TT |
793 | print_spaces_filtered (level + 2, stream); |
794 | if (is_enum) | |
a33ccfc7 | 795 | fputs_filtered (TYPE_FIELD_NAME (type, i), stream); |
c9317f21 | 796 | else if (!is_tuple_struct) |
b50f188d TT |
797 | fprintf_filtered (stream, "%s: ", TYPE_FIELD_NAME (type, i)); |
798 | ||
c9317f21 | 799 | rust_internal_print_type (TYPE_FIELD_TYPE (type, i), NULL, |
53d7df28 | 800 | stream, (is_enum ? show : show - 1), |
a33ccfc7 TT |
801 | level + 2, flags, is_enum, podata); |
802 | if (!for_rust_enum || flags->print_offsets) | |
c9317f21 | 803 | fputs_filtered (",\n", stream); |
a33ccfc7 TT |
804 | /* Note that this check of "I" is ok because we only sorted the |
805 | fields by offset when print_offsets was set, so we won't take | |
806 | this branch in that case. */ | |
c9317f21 TT |
807 | else if (i + 1 < TYPE_NFIELDS (type)) |
808 | fputs_filtered (", ", stream); | |
b50f188d | 809 | } |
c44af4eb | 810 | |
a33ccfc7 TT |
811 | if (flags->print_offsets) |
812 | { | |
813 | /* Undo the temporary level increase we did above. */ | |
814 | level -= 2; | |
815 | podata->finish (type, level, stream); | |
816 | print_spaces_filtered (print_offset_data::indentation, stream); | |
817 | if (level == 0) | |
818 | print_spaces_filtered (2, stream); | |
819 | } | |
820 | if (!for_rust_enum || flags->print_offsets) | |
c9317f21 TT |
821 | print_spaces_filtered (level, stream); |
822 | fputs_filtered (is_tuple_struct ? ")" : "}", stream); | |
c44af4eb TT |
823 | } |
824 | ||
c44af4eb TT |
825 | /* la_print_typedef implementation for Rust. */ |
826 | ||
827 | static void | |
828 | rust_print_typedef (struct type *type, | |
829 | struct symbol *new_symbol, | |
830 | struct ui_file *stream) | |
831 | { | |
832 | type = check_typedef (type); | |
987012b8 | 833 | fprintf_filtered (stream, "type %s = ", new_symbol->print_name ()); |
c44af4eb | 834 | type_print (type, "", stream, 0); |
e1709896 | 835 | fprintf_filtered (stream, ";"); |
c44af4eb TT |
836 | } |
837 | ||
838 | /* la_print_type implementation for Rust. */ | |
839 | ||
840 | static void | |
c9317f21 TT |
841 | rust_internal_print_type (struct type *type, const char *varstring, |
842 | struct ui_file *stream, int show, int level, | |
843 | const struct type_print_options *flags, | |
a33ccfc7 | 844 | bool for_rust_enum, print_offset_data *podata) |
c44af4eb | 845 | { |
c44af4eb TT |
846 | QUIT; |
847 | if (show <= 0 | |
848 | && TYPE_NAME (type) != NULL) | |
849 | { | |
921d8f54 MG |
850 | /* Rust calls the unit type "void" in its debuginfo, |
851 | but we don't want to print it as that. */ | |
852 | if (TYPE_CODE (type) == TYPE_CODE_VOID) | |
853 | fputs_filtered ("()", stream); | |
854 | else | |
855 | fputs_filtered (TYPE_NAME (type), stream); | |
c44af4eb TT |
856 | return; |
857 | } | |
858 | ||
859 | type = check_typedef (type); | |
860 | switch (TYPE_CODE (type)) | |
861 | { | |
921d8f54 | 862 | case TYPE_CODE_VOID: |
c9317f21 TT |
863 | /* If we have an enum, we've already printed the type's |
864 | unqualified name, and there is nothing else to print | |
865 | here. */ | |
866 | if (!for_rust_enum) | |
867 | fputs_filtered ("()", stream); | |
921d8f54 MG |
868 | break; |
869 | ||
c44af4eb TT |
870 | case TYPE_CODE_FUNC: |
871 | /* Delegate varargs to the C printer. */ | |
872 | if (TYPE_VARARGS (type)) | |
873 | goto c_printer; | |
874 | ||
875 | fputs_filtered ("fn ", stream); | |
876 | if (varstring != NULL) | |
877 | fputs_filtered (varstring, stream); | |
878 | fputs_filtered ("(", stream); | |
b926417a | 879 | for (int i = 0; i < TYPE_NFIELDS (type); ++i) |
c44af4eb TT |
880 | { |
881 | QUIT; | |
882 | if (i > 0) | |
883 | fputs_filtered (", ", stream); | |
c9317f21 | 884 | rust_internal_print_type (TYPE_FIELD_TYPE (type, i), "", stream, |
a33ccfc7 | 885 | -1, 0, flags, false, podata); |
c44af4eb | 886 | } |
921d8f54 MG |
887 | fputs_filtered (")", stream); |
888 | /* If it returns unit, we can omit the return type. */ | |
889 | if (TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_VOID) | |
890 | { | |
891 | fputs_filtered (" -> ", stream); | |
c9317f21 | 892 | rust_internal_print_type (TYPE_TARGET_TYPE (type), "", stream, |
a33ccfc7 | 893 | -1, 0, flags, false, podata); |
921d8f54 | 894 | } |
c44af4eb TT |
895 | break; |
896 | ||
897 | case TYPE_CODE_ARRAY: | |
898 | { | |
899 | LONGEST low_bound, high_bound; | |
900 | ||
901 | fputs_filtered ("[", stream); | |
c9317f21 | 902 | rust_internal_print_type (TYPE_TARGET_TYPE (type), NULL, |
a33ccfc7 TT |
903 | stream, show - 1, level, flags, false, |
904 | podata); | |
c44af4eb TT |
905 | |
906 | if (TYPE_HIGH_BOUND_KIND (TYPE_INDEX_TYPE (type)) == PROP_LOCEXPR | |
907 | || TYPE_HIGH_BOUND_KIND (TYPE_INDEX_TYPE (type)) == PROP_LOCLIST) | |
e6cf65f2 | 908 | fprintf_filtered (stream, "; variable length"); |
c44af4eb | 909 | else if (get_array_bounds (type, &low_bound, &high_bound)) |
e6cf65f2 | 910 | fprintf_filtered (stream, "; %s", |
c44af4eb TT |
911 | plongest (high_bound - low_bound + 1)); |
912 | fputs_filtered ("]", stream); | |
913 | } | |
914 | break; | |
915 | ||
c9317f21 | 916 | case TYPE_CODE_UNION: |
c44af4eb | 917 | case TYPE_CODE_STRUCT: |
c9317f21 | 918 | rust_print_struct_def (type, varstring, stream, show, level, flags, |
a33ccfc7 | 919 | for_rust_enum, podata); |
c44af4eb TT |
920 | break; |
921 | ||
922 | case TYPE_CODE_ENUM: | |
923 | { | |
b926417a | 924 | int len = 0; |
c44af4eb TT |
925 | |
926 | fputs_filtered ("enum ", stream); | |
e86ca25f | 927 | if (TYPE_NAME (type) != NULL) |
c44af4eb | 928 | { |
e86ca25f | 929 | fputs_filtered (TYPE_NAME (type), stream); |
c44af4eb | 930 | fputs_filtered (" ", stream); |
e86ca25f | 931 | len = strlen (TYPE_NAME (type)); |
c44af4eb TT |
932 | } |
933 | fputs_filtered ("{\n", stream); | |
934 | ||
b926417a | 935 | for (int i = 0; i < TYPE_NFIELDS (type); ++i) |
c44af4eb TT |
936 | { |
937 | const char *name = TYPE_FIELD_NAME (type, i); | |
938 | ||
939 | QUIT; | |
940 | ||
941 | if (len > 0 | |
e86ca25f | 942 | && strncmp (name, TYPE_NAME (type), len) == 0 |
c44af4eb TT |
943 | && name[len] == ':' |
944 | && name[len + 1] == ':') | |
945 | name += len + 2; | |
946 | fprintfi_filtered (level + 2, stream, "%s,\n", name); | |
947 | } | |
948 | ||
949 | fputs_filtered ("}", stream); | |
950 | } | |
73fc52c4 TT |
951 | break; |
952 | ||
953 | case TYPE_CODE_PTR: | |
954 | { | |
955 | if (TYPE_NAME (type) != nullptr) | |
956 | fputs_filtered (TYPE_NAME (type), stream); | |
957 | else | |
958 | { | |
959 | /* We currently can't distinguish between pointers and | |
960 | references. */ | |
961 | fputs_filtered ("*mut ", stream); | |
962 | type_print (TYPE_TARGET_TYPE (type), "", stream, 0); | |
963 | } | |
964 | } | |
c44af4eb TT |
965 | break; |
966 | ||
c44af4eb TT |
967 | default: |
968 | c_printer: | |
969 | c_print_type (type, varstring, stream, show, level, flags); | |
970 | } | |
971 | } | |
972 | ||
c9317f21 TT |
973 | static void |
974 | rust_print_type (struct type *type, const char *varstring, | |
975 | struct ui_file *stream, int show, int level, | |
976 | const struct type_print_options *flags) | |
977 | { | |
a33ccfc7 | 978 | print_offset_data podata; |
c9317f21 | 979 | rust_internal_print_type (type, varstring, stream, show, level, |
a33ccfc7 | 980 | flags, false, &podata); |
c9317f21 TT |
981 | } |
982 | ||
c44af4eb TT |
983 | \f |
984 | ||
c44af4eb TT |
985 | /* Like arch_composite_type, but uses TYPE to decide how to allocate |
986 | -- either on an obstack or on a gdbarch. */ | |
987 | ||
988 | static struct type * | |
989 | rust_composite_type (struct type *original, | |
990 | const char *name, | |
991 | const char *field1, struct type *type1, | |
992 | const char *field2, struct type *type2) | |
993 | { | |
994 | struct type *result = alloc_type_copy (original); | |
995 | int i, nfields, bitpos; | |
996 | ||
997 | nfields = 0; | |
998 | if (field1 != NULL) | |
999 | ++nfields; | |
1000 | if (field2 != NULL) | |
1001 | ++nfields; | |
1002 | ||
1003 | TYPE_CODE (result) = TYPE_CODE_STRUCT; | |
1004 | TYPE_NAME (result) = name; | |
c44af4eb TT |
1005 | |
1006 | TYPE_NFIELDS (result) = nfields; | |
1007 | TYPE_FIELDS (result) | |
1008 | = (struct field *) TYPE_ZALLOC (result, nfields * sizeof (struct field)); | |
1009 | ||
1010 | i = 0; | |
1011 | bitpos = 0; | |
1012 | if (field1 != NULL) | |
1013 | { | |
1014 | struct field *field = &TYPE_FIELD (result, i); | |
1015 | ||
1016 | SET_FIELD_BITPOS (*field, bitpos); | |
1017 | bitpos += TYPE_LENGTH (type1) * TARGET_CHAR_BIT; | |
1018 | ||
1019 | FIELD_NAME (*field) = field1; | |
1020 | FIELD_TYPE (*field) = type1; | |
1021 | ++i; | |
1022 | } | |
1023 | if (field2 != NULL) | |
1024 | { | |
1025 | struct field *field = &TYPE_FIELD (result, i); | |
2fff16dd | 1026 | unsigned align = type_align (type2); |
c44af4eb TT |
1027 | |
1028 | if (align != 0) | |
1029 | { | |
1030 | int delta; | |
1031 | ||
1032 | align *= TARGET_CHAR_BIT; | |
1033 | delta = bitpos % align; | |
1034 | if (delta != 0) | |
1035 | bitpos += align - delta; | |
1036 | } | |
1037 | SET_FIELD_BITPOS (*field, bitpos); | |
1038 | ||
1039 | FIELD_NAME (*field) = field2; | |
1040 | FIELD_TYPE (*field) = type2; | |
1041 | ++i; | |
1042 | } | |
1043 | ||
1044 | if (i > 0) | |
1045 | TYPE_LENGTH (result) | |
1046 | = (TYPE_FIELD_BITPOS (result, i - 1) / TARGET_CHAR_BIT + | |
1047 | TYPE_LENGTH (TYPE_FIELD_TYPE (result, i - 1))); | |
1048 | return result; | |
1049 | } | |
1050 | ||
1051 | /* See rust-lang.h. */ | |
1052 | ||
1053 | struct type * | |
1054 | rust_slice_type (const char *name, struct type *elt_type, | |
1055 | struct type *usize_type) | |
1056 | { | |
1057 | struct type *type; | |
1058 | ||
1059 | elt_type = lookup_pointer_type (elt_type); | |
1060 | type = rust_composite_type (elt_type, name, | |
1061 | "data_ptr", elt_type, | |
1062 | "length", usize_type); | |
1063 | ||
1064 | return type; | |
1065 | } | |
1066 | ||
1067 | enum rust_primitive_types | |
1068 | { | |
1069 | rust_primitive_bool, | |
1070 | rust_primitive_char, | |
1071 | rust_primitive_i8, | |
1072 | rust_primitive_u8, | |
1073 | rust_primitive_i16, | |
1074 | rust_primitive_u16, | |
1075 | rust_primitive_i32, | |
1076 | rust_primitive_u32, | |
1077 | rust_primitive_i64, | |
1078 | rust_primitive_u64, | |
1079 | rust_primitive_isize, | |
1080 | rust_primitive_usize, | |
1081 | rust_primitive_f32, | |
1082 | rust_primitive_f64, | |
1083 | rust_primitive_unit, | |
1084 | rust_primitive_str, | |
1085 | nr_rust_primitive_types | |
1086 | }; | |
1087 | ||
1088 | /* la_language_arch_info implementation for Rust. */ | |
1089 | ||
1090 | static void | |
1091 | rust_language_arch_info (struct gdbarch *gdbarch, | |
1092 | struct language_arch_info *lai) | |
1093 | { | |
1094 | const struct builtin_type *builtin = builtin_type (gdbarch); | |
1095 | struct type *tem; | |
1096 | struct type **types; | |
1097 | unsigned int length; | |
1098 | ||
1099 | types = GDBARCH_OBSTACK_CALLOC (gdbarch, nr_rust_primitive_types + 1, | |
1100 | struct type *); | |
1101 | ||
1102 | types[rust_primitive_bool] = arch_boolean_type (gdbarch, 8, 1, "bool"); | |
1103 | types[rust_primitive_char] = arch_character_type (gdbarch, 32, 1, "char"); | |
1104 | types[rust_primitive_i8] = arch_integer_type (gdbarch, 8, 0, "i8"); | |
1105 | types[rust_primitive_u8] = arch_integer_type (gdbarch, 8, 1, "u8"); | |
1106 | types[rust_primitive_i16] = arch_integer_type (gdbarch, 16, 0, "i16"); | |
1107 | types[rust_primitive_u16] = arch_integer_type (gdbarch, 16, 1, "u16"); | |
1108 | types[rust_primitive_i32] = arch_integer_type (gdbarch, 32, 0, "i32"); | |
1109 | types[rust_primitive_u32] = arch_integer_type (gdbarch, 32, 1, "u32"); | |
1110 | types[rust_primitive_i64] = arch_integer_type (gdbarch, 64, 0, "i64"); | |
1111 | types[rust_primitive_u64] = arch_integer_type (gdbarch, 64, 1, "u64"); | |
1112 | ||
1113 | length = 8 * TYPE_LENGTH (builtin->builtin_data_ptr); | |
1114 | types[rust_primitive_isize] = arch_integer_type (gdbarch, length, 0, "isize"); | |
1115 | types[rust_primitive_usize] = arch_integer_type (gdbarch, length, 1, "usize"); | |
1116 | ||
49f190bc UW |
1117 | types[rust_primitive_f32] = arch_float_type (gdbarch, 32, "f32", |
1118 | floatformats_ieee_single); | |
1119 | types[rust_primitive_f64] = arch_float_type (gdbarch, 64, "f64", | |
1120 | floatformats_ieee_double); | |
c44af4eb TT |
1121 | |
1122 | types[rust_primitive_unit] = arch_integer_type (gdbarch, 0, 1, "()"); | |
1123 | ||
1124 | tem = make_cv_type (1, 0, types[rust_primitive_u8], NULL); | |
1125 | types[rust_primitive_str] = rust_slice_type ("&str", tem, | |
1126 | types[rust_primitive_usize]); | |
1127 | ||
1128 | lai->primitive_type_vector = types; | |
1129 | lai->bool_type_default = types[rust_primitive_bool]; | |
1130 | lai->string_char_type = types[rust_primitive_u8]; | |
1131 | } | |
1132 | ||
1133 | \f | |
1134 | ||
1135 | /* A helper for rust_evaluate_subexp that handles OP_FUNCALL. */ | |
1136 | ||
1137 | static struct value * | |
1138 | rust_evaluate_funcall (struct expression *exp, int *pos, enum noside noside) | |
1139 | { | |
1140 | int i; | |
1141 | int num_args = exp->elts[*pos + 1].longconst; | |
1142 | const char *method; | |
c44af4eb | 1143 | struct value *function, *result, *arg0; |
c44af4eb TT |
1144 | struct type *type, *fn_type; |
1145 | const struct block *block; | |
1146 | struct block_symbol sym; | |
1147 | ||
1148 | /* For an ordinary function call we can simply defer to the | |
1149 | generic implementation. */ | |
1150 | if (exp->elts[*pos + 3].opcode != STRUCTOP_STRUCT) | |
1151 | return evaluate_subexp_standard (NULL, exp, pos, noside); | |
1152 | ||
1153 | /* Skip over the OP_FUNCALL and the STRUCTOP_STRUCT. */ | |
1154 | *pos += 4; | |
1155 | method = &exp->elts[*pos + 1].string; | |
1156 | *pos += 3 + BYTES_TO_EXP_ELEM (exp->elts[*pos].longconst + 1); | |
1157 | ||
1158 | /* Evaluate the argument to STRUCTOP_STRUCT, then find its | |
1159 | type in order to look up the method. */ | |
1160 | arg0 = evaluate_subexp (NULL_TYPE, exp, pos, noside); | |
1161 | ||
1162 | if (noside == EVAL_SKIP) | |
1163 | { | |
1164 | for (i = 0; i < num_args; ++i) | |
1165 | evaluate_subexp (NULL_TYPE, exp, pos, noside); | |
1166 | return arg0; | |
1167 | } | |
1168 | ||
ab8b80a8 | 1169 | std::vector<struct value *> args (num_args + 1); |
c44af4eb TT |
1170 | args[0] = arg0; |
1171 | ||
1172 | /* We don't yet implement real Deref semantics. */ | |
1173 | while (TYPE_CODE (value_type (args[0])) == TYPE_CODE_PTR) | |
1174 | args[0] = value_ind (args[0]); | |
1175 | ||
1176 | type = value_type (args[0]); | |
1177 | if ((TYPE_CODE (type) != TYPE_CODE_STRUCT | |
1178 | && TYPE_CODE (type) != TYPE_CODE_UNION | |
1179 | && TYPE_CODE (type) != TYPE_CODE_ENUM) | |
1180 | || rust_tuple_type_p (type)) | |
1181 | error (_("Method calls only supported on struct or enum types")); | |
e86ca25f | 1182 | if (TYPE_NAME (type) == NULL) |
c44af4eb TT |
1183 | error (_("Method call on nameless type")); |
1184 | ||
e86ca25f | 1185 | std::string name = std::string (TYPE_NAME (type)) + "::" + method; |
c44af4eb TT |
1186 | |
1187 | block = get_selected_block (0); | |
ab8b80a8 | 1188 | sym = lookup_symbol (name.c_str (), block, VAR_DOMAIN, NULL); |
c44af4eb | 1189 | if (sym.symbol == NULL) |
ab8b80a8 | 1190 | error (_("Could not find function named '%s'"), name.c_str ()); |
c44af4eb TT |
1191 | |
1192 | fn_type = SYMBOL_TYPE (sym.symbol); | |
1193 | if (TYPE_NFIELDS (fn_type) == 0) | |
ab8b80a8 | 1194 | error (_("Function '%s' takes no arguments"), name.c_str ()); |
c44af4eb TT |
1195 | |
1196 | if (TYPE_CODE (TYPE_FIELD_TYPE (fn_type, 0)) == TYPE_CODE_PTR) | |
1197 | args[0] = value_addr (args[0]); | |
1198 | ||
1199 | function = address_of_variable (sym.symbol, block); | |
1200 | ||
1201 | for (i = 0; i < num_args; ++i) | |
1202 | args[i + 1] = evaluate_subexp (NULL_TYPE, exp, pos, noside); | |
1203 | ||
1204 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1205 | result = value_zero (TYPE_TARGET_TYPE (fn_type), not_lval); | |
1206 | else | |
e71585ff | 1207 | result = call_function_by_hand (function, NULL, args); |
c44af4eb TT |
1208 | return result; |
1209 | } | |
1210 | ||
01739a3b | 1211 | /* A helper for rust_evaluate_subexp that handles OP_RANGE. */ |
c44af4eb TT |
1212 | |
1213 | static struct value * | |
1214 | rust_range (struct expression *exp, int *pos, enum noside noside) | |
1215 | { | |
01739a3b | 1216 | enum range_type kind; |
c44af4eb TT |
1217 | struct value *low = NULL, *high = NULL; |
1218 | struct value *addrval, *result; | |
1219 | CORE_ADDR addr; | |
1220 | struct type *range_type; | |
1221 | struct type *index_type; | |
1222 | struct type *temp_type; | |
1223 | const char *name; | |
1224 | ||
01739a3b | 1225 | kind = (enum range_type) longest_to_int (exp->elts[*pos + 1].longconst); |
c44af4eb TT |
1226 | *pos += 3; |
1227 | ||
6873858b TT |
1228 | if (kind == HIGH_BOUND_DEFAULT || kind == NONE_BOUND_DEFAULT |
1229 | || kind == NONE_BOUND_DEFAULT_EXCLUSIVE) | |
c44af4eb | 1230 | low = evaluate_subexp (NULL_TYPE, exp, pos, noside); |
6873858b TT |
1231 | if (kind == LOW_BOUND_DEFAULT || kind == LOW_BOUND_DEFAULT_EXCLUSIVE |
1232 | || kind == NONE_BOUND_DEFAULT || kind == NONE_BOUND_DEFAULT_EXCLUSIVE) | |
c44af4eb | 1233 | high = evaluate_subexp (NULL_TYPE, exp, pos, noside); |
6873858b | 1234 | bool inclusive = (kind == NONE_BOUND_DEFAULT || kind == LOW_BOUND_DEFAULT); |
c44af4eb TT |
1235 | |
1236 | if (noside == EVAL_SKIP) | |
1237 | return value_from_longest (builtin_type (exp->gdbarch)->builtin_int, 1); | |
1238 | ||
1239 | if (low == NULL) | |
1240 | { | |
1241 | if (high == NULL) | |
1242 | { | |
1243 | index_type = NULL; | |
1244 | name = "std::ops::RangeFull"; | |
1245 | } | |
1246 | else | |
1247 | { | |
1248 | index_type = value_type (high); | |
6873858b TT |
1249 | name = (inclusive |
1250 | ? "std::ops::RangeToInclusive" : "std::ops::RangeTo"); | |
c44af4eb TT |
1251 | } |
1252 | } | |
1253 | else | |
1254 | { | |
1255 | if (high == NULL) | |
1256 | { | |
1257 | index_type = value_type (low); | |
1258 | name = "std::ops::RangeFrom"; | |
1259 | } | |
1260 | else | |
1261 | { | |
1262 | if (!types_equal (value_type (low), value_type (high))) | |
1263 | error (_("Range expression with different types")); | |
1264 | index_type = value_type (low); | |
6873858b | 1265 | name = inclusive ? "std::ops::RangeInclusive" : "std::ops::Range"; |
c44af4eb TT |
1266 | } |
1267 | } | |
1268 | ||
1269 | /* If we don't have an index type, just allocate this on the | |
1270 | arch. Here any type will do. */ | |
1271 | temp_type = (index_type == NULL | |
1272 | ? language_bool_type (exp->language_defn, exp->gdbarch) | |
1273 | : index_type); | |
1274 | /* It would be nicer to cache the range type. */ | |
1275 | range_type = rust_composite_type (temp_type, name, | |
1276 | low == NULL ? NULL : "start", index_type, | |
1277 | high == NULL ? NULL : "end", index_type); | |
1278 | ||
1279 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1280 | return value_zero (range_type, lval_memory); | |
1281 | ||
1282 | addrval = value_allocate_space_in_inferior (TYPE_LENGTH (range_type)); | |
1283 | addr = value_as_long (addrval); | |
1284 | result = value_at_lazy (range_type, addr); | |
1285 | ||
1286 | if (low != NULL) | |
1287 | { | |
1288 | struct value *start = value_struct_elt (&result, NULL, "start", NULL, | |
1289 | "range"); | |
1290 | ||
1291 | value_assign (start, low); | |
1292 | } | |
1293 | ||
1294 | if (high != NULL) | |
1295 | { | |
1296 | struct value *end = value_struct_elt (&result, NULL, "end", NULL, | |
1297 | "range"); | |
1298 | ||
1299 | value_assign (end, high); | |
1300 | } | |
1301 | ||
1302 | result = value_at_lazy (range_type, addr); | |
1303 | return result; | |
1304 | } | |
1305 | ||
1306 | /* A helper function to compute the range and kind given a range | |
1307 | value. TYPE is the type of the range value. RANGE is the range | |
1308 | value. LOW, HIGH, and KIND are out parameters. The LOW and HIGH | |
1309 | parameters might be filled in, or might not be, depending on the | |
1310 | kind of range this is. KIND will always be set to the appropriate | |
1311 | value describing the kind of range, and this can be used to | |
1312 | determine whether LOW or HIGH are valid. */ | |
1313 | ||
1314 | static void | |
1315 | rust_compute_range (struct type *type, struct value *range, | |
1316 | LONGEST *low, LONGEST *high, | |
01739a3b | 1317 | enum range_type *kind) |
c44af4eb TT |
1318 | { |
1319 | int i; | |
1320 | ||
1321 | *low = 0; | |
1322 | *high = 0; | |
1323 | *kind = BOTH_BOUND_DEFAULT; | |
1324 | ||
1325 | if (TYPE_NFIELDS (type) == 0) | |
1326 | return; | |
1327 | ||
1328 | i = 0; | |
1329 | if (strcmp (TYPE_FIELD_NAME (type, 0), "start") == 0) | |
1330 | { | |
1331 | *kind = HIGH_BOUND_DEFAULT; | |
1332 | *low = value_as_long (value_field (range, 0)); | |
1333 | ++i; | |
1334 | } | |
1335 | if (TYPE_NFIELDS (type) > i | |
1336 | && strcmp (TYPE_FIELD_NAME (type, i), "end") == 0) | |
1337 | { | |
1338 | *kind = (*kind == BOTH_BOUND_DEFAULT | |
1339 | ? LOW_BOUND_DEFAULT : NONE_BOUND_DEFAULT); | |
1340 | *high = value_as_long (value_field (range, i)); | |
6873858b TT |
1341 | |
1342 | if (rust_inclusive_range_type_p (type)) | |
1343 | ++*high; | |
c44af4eb TT |
1344 | } |
1345 | } | |
1346 | ||
1347 | /* A helper for rust_evaluate_subexp that handles BINOP_SUBSCRIPT. */ | |
1348 | ||
1349 | static struct value * | |
1350 | rust_subscript (struct expression *exp, int *pos, enum noside noside, | |
1351 | int for_addr) | |
1352 | { | |
1353 | struct value *lhs, *rhs, *result; | |
1354 | struct type *rhstype; | |
45f4ed92 | 1355 | LONGEST low, high_bound; |
c44af4eb | 1356 | /* Initialized to appease the compiler. */ |
01739a3b | 1357 | enum range_type kind = BOTH_BOUND_DEFAULT; |
45f4ed92 | 1358 | LONGEST high = 0; |
c44af4eb TT |
1359 | int want_slice = 0; |
1360 | ||
1361 | ++*pos; | |
1362 | lhs = evaluate_subexp (NULL_TYPE, exp, pos, noside); | |
1363 | rhs = evaluate_subexp (NULL_TYPE, exp, pos, noside); | |
1364 | ||
1365 | if (noside == EVAL_SKIP) | |
1366 | return lhs; | |
1367 | ||
1368 | rhstype = check_typedef (value_type (rhs)); | |
1369 | if (rust_range_type_p (rhstype)) | |
1370 | { | |
1371 | if (!for_addr) | |
1372 | error (_("Can't take slice of array without '&'")); | |
1373 | rust_compute_range (rhstype, rhs, &low, &high, &kind); | |
1374 | want_slice = 1; | |
1375 | } | |
1376 | else | |
1377 | low = value_as_long (rhs); | |
1378 | ||
b3e3859b | 1379 | struct type *type = check_typedef (value_type (lhs)); |
c44af4eb TT |
1380 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
1381 | { | |
b3e3859b TT |
1382 | struct type *base_type = nullptr; |
1383 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) | |
1384 | base_type = TYPE_TARGET_TYPE (type); | |
1385 | else if (rust_slice_type_p (type)) | |
1386 | { | |
1387 | for (int i = 0; i < TYPE_NFIELDS (type); ++i) | |
1388 | { | |
1389 | if (strcmp (TYPE_FIELD_NAME (type, i), "data_ptr") == 0) | |
1390 | { | |
1391 | base_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, i)); | |
1392 | break; | |
1393 | } | |
1394 | } | |
1395 | if (base_type == nullptr) | |
1396 | error (_("Could not find 'data_ptr' in slice type")); | |
1397 | } | |
1398 | else if (TYPE_CODE (type) == TYPE_CODE_PTR) | |
1399 | base_type = TYPE_TARGET_TYPE (type); | |
1400 | else | |
1401 | error (_("Cannot subscript non-array type")); | |
1402 | ||
1403 | struct type *new_type; | |
1404 | if (want_slice) | |
1405 | { | |
1406 | if (rust_slice_type_p (type)) | |
1407 | new_type = type; | |
1408 | else | |
1409 | { | |
1410 | struct type *usize | |
1411 | = language_lookup_primitive_type (exp->language_defn, | |
1412 | exp->gdbarch, | |
1413 | "usize"); | |
1414 | new_type = rust_slice_type ("&[*gdb*]", base_type, usize); | |
1415 | } | |
1416 | } | |
1417 | else | |
1418 | new_type = base_type; | |
c44af4eb | 1419 | |
b3e3859b | 1420 | return value_zero (new_type, VALUE_LVAL (lhs)); |
c44af4eb TT |
1421 | } |
1422 | else | |
1423 | { | |
1424 | LONGEST low_bound; | |
1425 | struct value *base; | |
c44af4eb TT |
1426 | |
1427 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY) | |
1428 | { | |
1429 | base = lhs; | |
1430 | if (!get_array_bounds (type, &low_bound, &high_bound)) | |
1431 | error (_("Can't compute array bounds")); | |
1432 | if (low_bound != 0) | |
1433 | error (_("Found array with non-zero lower bound")); | |
1434 | ++high_bound; | |
1435 | } | |
1436 | else if (rust_slice_type_p (type)) | |
1437 | { | |
1438 | struct value *len; | |
1439 | ||
1440 | base = value_struct_elt (&lhs, NULL, "data_ptr", NULL, "slice"); | |
1441 | len = value_struct_elt (&lhs, NULL, "length", NULL, "slice"); | |
1442 | low_bound = 0; | |
1443 | high_bound = value_as_long (len); | |
1444 | } | |
42d94011 MG |
1445 | else if (TYPE_CODE (type) == TYPE_CODE_PTR) |
1446 | { | |
1447 | base = lhs; | |
1448 | low_bound = 0; | |
1449 | high_bound = LONGEST_MAX; | |
1450 | } | |
c44af4eb TT |
1451 | else |
1452 | error (_("Cannot subscript non-array type")); | |
1453 | ||
1454 | if (want_slice | |
1455 | && (kind == BOTH_BOUND_DEFAULT || kind == LOW_BOUND_DEFAULT)) | |
1456 | low = low_bound; | |
1457 | if (low < 0) | |
1458 | error (_("Index less than zero")); | |
1459 | if (low > high_bound) | |
1460 | error (_("Index greater than length")); | |
1461 | ||
1462 | result = value_subscript (base, low); | |
1463 | } | |
1464 | ||
1465 | if (for_addr) | |
1466 | { | |
1467 | if (want_slice) | |
1468 | { | |
1469 | struct type *usize, *slice; | |
1470 | CORE_ADDR addr; | |
1471 | struct value *addrval, *tem; | |
1472 | ||
1473 | if (kind == BOTH_BOUND_DEFAULT || kind == HIGH_BOUND_DEFAULT) | |
1474 | high = high_bound; | |
1475 | if (high < 0) | |
1476 | error (_("High index less than zero")); | |
1477 | if (low > high) | |
1478 | error (_("Low index greater than high index")); | |
1479 | if (high > high_bound) | |
1480 | error (_("High index greater than length")); | |
1481 | ||
1482 | usize = language_lookup_primitive_type (exp->language_defn, | |
1483 | exp->gdbarch, | |
1484 | "usize"); | |
45320ffa TT |
1485 | const char *new_name = ((type != nullptr |
1486 | && rust_slice_type_p (type)) | |
1487 | ? TYPE_NAME (type) : "&[*gdb*]"); | |
1488 | ||
1489 | slice = rust_slice_type (new_name, value_type (result), usize); | |
c44af4eb TT |
1490 | |
1491 | addrval = value_allocate_space_in_inferior (TYPE_LENGTH (slice)); | |
1492 | addr = value_as_long (addrval); | |
1493 | tem = value_at_lazy (slice, addr); | |
1494 | ||
1495 | value_assign (value_field (tem, 0), value_addr (result)); | |
1496 | value_assign (value_field (tem, 1), | |
1497 | value_from_longest (usize, high - low)); | |
1498 | ||
1499 | result = value_at_lazy (slice, addr); | |
1500 | } | |
1501 | else | |
1502 | result = value_addr (result); | |
1503 | } | |
1504 | ||
1505 | return result; | |
1506 | } | |
1507 | ||
1508 | /* evaluate_exp implementation for Rust. */ | |
1509 | ||
1510 | static struct value * | |
1511 | rust_evaluate_subexp (struct type *expect_type, struct expression *exp, | |
1512 | int *pos, enum noside noside) | |
1513 | { | |
1514 | struct value *result; | |
1515 | ||
1516 | switch (exp->elts[*pos].opcode) | |
1517 | { | |
71a3c369 TT |
1518 | case UNOP_IND: |
1519 | { | |
1520 | if (noside != EVAL_NORMAL) | |
1521 | result = evaluate_subexp_standard (expect_type, exp, pos, noside); | |
1522 | else | |
1523 | { | |
1524 | ++*pos; | |
1525 | struct value *value = evaluate_subexp (expect_type, exp, pos, | |
1526 | noside); | |
1527 | ||
1528 | struct value *trait_ptr = rust_get_trait_object_pointer (value); | |
1529 | if (trait_ptr != NULL) | |
1530 | value = trait_ptr; | |
1531 | ||
1532 | result = value_ind (value); | |
1533 | } | |
1534 | } | |
1535 | break; | |
1536 | ||
c44af4eb TT |
1537 | case UNOP_COMPLEMENT: |
1538 | { | |
1539 | struct value *value; | |
1540 | ||
1541 | ++*pos; | |
1542 | value = evaluate_subexp (NULL_TYPE, exp, pos, noside); | |
1543 | if (noside == EVAL_SKIP) | |
1544 | { | |
1545 | /* Preserving the type is enough. */ | |
1546 | return value; | |
1547 | } | |
1548 | if (TYPE_CODE (value_type (value)) == TYPE_CODE_BOOL) | |
1549 | result = value_from_longest (value_type (value), | |
1550 | value_logical_not (value)); | |
1551 | else | |
1552 | result = value_complement (value); | |
1553 | } | |
1554 | break; | |
1555 | ||
1556 | case BINOP_SUBSCRIPT: | |
1557 | result = rust_subscript (exp, pos, noside, 0); | |
1558 | break; | |
1559 | ||
1560 | case OP_FUNCALL: | |
1561 | result = rust_evaluate_funcall (exp, pos, noside); | |
1562 | break; | |
1563 | ||
1564 | case OP_AGGREGATE: | |
1565 | { | |
1566 | int pc = (*pos)++; | |
1567 | struct type *type = exp->elts[pc + 1].type; | |
1568 | int arglen = longest_to_int (exp->elts[pc + 2].longconst); | |
1569 | int i; | |
1570 | CORE_ADDR addr = 0; | |
1571 | struct value *addrval = NULL; | |
1572 | ||
1573 | *pos += 3; | |
1574 | ||
1575 | if (noside == EVAL_NORMAL) | |
1576 | { | |
1577 | addrval = value_allocate_space_in_inferior (TYPE_LENGTH (type)); | |
1578 | addr = value_as_long (addrval); | |
1579 | result = value_at_lazy (type, addr); | |
1580 | } | |
1581 | ||
1582 | if (arglen > 0 && exp->elts[*pos].opcode == OP_OTHERS) | |
1583 | { | |
1584 | struct value *init; | |
1585 | ||
1586 | ++*pos; | |
1587 | init = rust_evaluate_subexp (NULL, exp, pos, noside); | |
1588 | if (noside == EVAL_NORMAL) | |
1589 | { | |
1590 | /* This isn't quite right but will do for the time | |
1591 | being, seeing that we can't implement the Copy | |
1592 | trait anyway. */ | |
1593 | value_assign (result, init); | |
1594 | } | |
1595 | ||
1596 | --arglen; | |
1597 | } | |
1598 | ||
1599 | gdb_assert (arglen % 2 == 0); | |
1600 | for (i = 0; i < arglen; i += 2) | |
1601 | { | |
1602 | int len; | |
1603 | const char *fieldname; | |
1604 | struct value *value, *field; | |
1605 | ||
1606 | gdb_assert (exp->elts[*pos].opcode == OP_NAME); | |
1607 | ++*pos; | |
1608 | len = longest_to_int (exp->elts[*pos].longconst); | |
1609 | ++*pos; | |
1610 | fieldname = &exp->elts[*pos].string; | |
1611 | *pos += 2 + BYTES_TO_EXP_ELEM (len + 1); | |
1612 | ||
1613 | value = rust_evaluate_subexp (NULL, exp, pos, noside); | |
1614 | if (noside == EVAL_NORMAL) | |
1615 | { | |
1616 | field = value_struct_elt (&result, NULL, fieldname, NULL, | |
1617 | "structure"); | |
1618 | value_assign (field, value); | |
1619 | } | |
1620 | } | |
1621 | ||
1622 | if (noside == EVAL_SKIP) | |
1623 | return value_from_longest (builtin_type (exp->gdbarch)->builtin_int, | |
1624 | 1); | |
1625 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1626 | result = allocate_value (type); | |
1627 | else | |
1628 | result = value_at_lazy (type, addr); | |
1629 | } | |
1630 | break; | |
1631 | ||
1632 | case OP_RUST_ARRAY: | |
1633 | { | |
8d49165d | 1634 | (*pos)++; |
c44af4eb TT |
1635 | int copies; |
1636 | struct value *elt; | |
1637 | struct value *ncopies; | |
1638 | ||
1639 | elt = rust_evaluate_subexp (NULL, exp, pos, noside); | |
1640 | ncopies = rust_evaluate_subexp (NULL, exp, pos, noside); | |
1641 | copies = value_as_long (ncopies); | |
1642 | if (copies < 0) | |
1643 | error (_("Array with negative number of elements")); | |
1644 | ||
1645 | if (noside == EVAL_NORMAL) | |
1646 | { | |
c44af4eb | 1647 | int i; |
ab8b80a8 | 1648 | std::vector<struct value *> eltvec (copies); |
c44af4eb TT |
1649 | |
1650 | for (i = 0; i < copies; ++i) | |
1651 | eltvec[i] = elt; | |
ab8b80a8 | 1652 | result = value_array (0, copies - 1, eltvec.data ()); |
c44af4eb TT |
1653 | } |
1654 | else | |
1655 | { | |
1656 | struct type *arraytype | |
1657 | = lookup_array_range_type (value_type (elt), 0, copies - 1); | |
1658 | result = allocate_value (arraytype); | |
1659 | } | |
1660 | } | |
1661 | break; | |
1662 | ||
1663 | case STRUCTOP_ANONYMOUS: | |
1664 | { | |
1665 | /* Anonymous field access, i.e. foo.1. */ | |
1666 | struct value *lhs; | |
1667 | int pc, field_number, nfields; | |
8d49165d | 1668 | struct type *type; |
c44af4eb TT |
1669 | |
1670 | pc = (*pos)++; | |
1671 | field_number = longest_to_int (exp->elts[pc + 1].longconst); | |
1672 | (*pos) += 2; | |
1673 | lhs = evaluate_subexp (NULL_TYPE, exp, pos, noside); | |
1674 | ||
1675 | type = value_type (lhs); | |
c9317f21 | 1676 | |
c9317f21 TT |
1677 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT) |
1678 | { | |
1679 | struct type *outer_type = NULL; | |
1680 | ||
1681 | if (rust_enum_p (type)) | |
c44af4eb | 1682 | { |
098b2108 TT |
1683 | if (rust_empty_enum_p (type)) |
1684 | error (_("Cannot access field %d of empty enum %s"), | |
1685 | field_number, TYPE_NAME (type)); | |
1686 | ||
c9317f21 TT |
1687 | const gdb_byte *valaddr = value_contents (lhs); |
1688 | struct field *variant_field = rust_enum_variant (type, valaddr); | |
1689 | ||
1690 | struct value *union_value = value_primitive_field (lhs, 0, 0, | |
1691 | type); | |
1692 | ||
1693 | int fieldno = (variant_field | |
1694 | - &TYPE_FIELD (value_type (union_value), 0)); | |
1695 | lhs = value_primitive_field (union_value, 0, fieldno, | |
1696 | value_type (union_value)); | |
1697 | outer_type = type; | |
1698 | type = value_type (lhs); | |
c44af4eb TT |
1699 | } |
1700 | ||
c44af4eb | 1701 | /* Tuples and tuple structs */ |
c9317f21 | 1702 | nfields = TYPE_NFIELDS (type); |
c44af4eb TT |
1703 | |
1704 | if (field_number >= nfields || field_number < 0) | |
c9317f21 TT |
1705 | { |
1706 | if (outer_type != NULL) | |
1707 | error(_("Cannot access field %d of variant %s::%s, " | |
1708 | "there are only %d fields"), | |
e86ca25f TT |
1709 | field_number, TYPE_NAME (outer_type), |
1710 | rust_last_path_segment (TYPE_NAME (type)), | |
c9317f21 TT |
1711 | nfields); |
1712 | else | |
1713 | error(_("Cannot access field %d of %s, " | |
1714 | "there are only %d fields"), | |
e86ca25f | 1715 | field_number, TYPE_NAME (type), nfields); |
c9317f21 | 1716 | } |
c44af4eb TT |
1717 | |
1718 | /* Tuples are tuple structs too. */ | |
1719 | if (!rust_tuple_struct_type_p (type)) | |
c9317f21 TT |
1720 | { |
1721 | if (outer_type != NULL) | |
1722 | error(_("Variant %s::%s is not a tuple variant"), | |
e86ca25f TT |
1723 | TYPE_NAME (outer_type), |
1724 | rust_last_path_segment (TYPE_NAME (type))); | |
c9317f21 TT |
1725 | else |
1726 | error(_("Attempting to access anonymous field %d " | |
1727 | "of %s, which is not a tuple, tuple struct, or " | |
1728 | "tuple-like variant"), | |
e86ca25f | 1729 | field_number, TYPE_NAME (type)); |
c9317f21 | 1730 | } |
c44af4eb TT |
1731 | |
1732 | result = value_primitive_field (lhs, 0, field_number, type); | |
1733 | } | |
1734 | else | |
1735 | error(_("Anonymous field access is only allowed on tuples, \ | |
1736 | tuple structs, and tuple-like enum variants")); | |
1737 | } | |
1738 | break; | |
1739 | ||
1740 | case STRUCTOP_STRUCT: | |
1741 | { | |
6830f270 | 1742 | struct value *lhs; |
c44af4eb TT |
1743 | struct type *type; |
1744 | int tem, pc; | |
1745 | ||
1746 | pc = (*pos)++; | |
1747 | tem = longest_to_int (exp->elts[pc + 1].longconst); | |
1748 | (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1); | |
1749 | lhs = evaluate_subexp (NULL_TYPE, exp, pos, noside); | |
1750 | ||
6830f270 | 1751 | const char *field_name = &exp->elts[pc + 2].string; |
c44af4eb | 1752 | type = value_type (lhs); |
c9317f21 | 1753 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT && rust_enum_p (type)) |
c44af4eb | 1754 | { |
098b2108 TT |
1755 | if (rust_empty_enum_p (type)) |
1756 | error (_("Cannot access field %s of empty enum %s"), | |
1757 | field_name, TYPE_NAME (type)); | |
1758 | ||
c9317f21 TT |
1759 | const gdb_byte *valaddr = value_contents (lhs); |
1760 | struct field *variant_field = rust_enum_variant (type, valaddr); | |
1761 | ||
1762 | struct value *union_value = value_primitive_field (lhs, 0, 0, | |
1763 | type); | |
1764 | ||
1765 | int fieldno = (variant_field | |
1766 | - &TYPE_FIELD (value_type (union_value), 0)); | |
1767 | lhs = value_primitive_field (union_value, 0, fieldno, | |
1768 | value_type (union_value)); | |
1769 | ||
1770 | struct type *outer_type = type; | |
1771 | type = value_type (lhs); | |
1772 | if (rust_tuple_type_p (type) || rust_tuple_struct_type_p (type)) | |
4a3fe98f | 1773 | error (_("Attempting to access named field %s of tuple " |
c9317f21 | 1774 | "variant %s::%s, which has only anonymous fields"), |
4a3fe98f | 1775 | field_name, TYPE_NAME (outer_type), |
c9317f21 TT |
1776 | rust_last_path_segment (TYPE_NAME (type))); |
1777 | ||
a70b8144 | 1778 | try |
c44af4eb | 1779 | { |
c9317f21 TT |
1780 | result = value_struct_elt (&lhs, NULL, field_name, |
1781 | NULL, "structure"); | |
c44af4eb | 1782 | } |
230d2906 | 1783 | catch (const gdb_exception_error &except) |
c9317f21 TT |
1784 | { |
1785 | error (_("Could not find field %s of struct variant %s::%s"), | |
e86ca25f | 1786 | field_name, TYPE_NAME (outer_type), |
c9317f21 TT |
1787 | rust_last_path_segment (TYPE_NAME (type))); |
1788 | } | |
c44af4eb TT |
1789 | } |
1790 | else | |
c9317f21 TT |
1791 | result = value_struct_elt (&lhs, NULL, field_name, NULL, "structure"); |
1792 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1793 | result = value_zero (value_type (result), VALUE_LVAL (result)); | |
c44af4eb TT |
1794 | } |
1795 | break; | |
1796 | ||
01739a3b | 1797 | case OP_RANGE: |
c44af4eb TT |
1798 | result = rust_range (exp, pos, noside); |
1799 | break; | |
1800 | ||
1801 | case UNOP_ADDR: | |
1802 | /* We might have &array[range], in which case we need to make a | |
1803 | slice. */ | |
1804 | if (exp->elts[*pos + 1].opcode == BINOP_SUBSCRIPT) | |
1805 | { | |
1806 | ++*pos; | |
1807 | result = rust_subscript (exp, pos, noside, 1); | |
1808 | break; | |
1809 | } | |
1810 | /* Fall through. */ | |
1811 | default: | |
1812 | result = evaluate_subexp_standard (expect_type, exp, pos, noside); | |
1813 | break; | |
1814 | } | |
1815 | ||
1816 | return result; | |
1817 | } | |
1818 | ||
1819 | /* operator_length implementation for Rust. */ | |
1820 | ||
1821 | static void | |
1822 | rust_operator_length (const struct expression *exp, int pc, int *oplenp, | |
1823 | int *argsp) | |
1824 | { | |
1825 | int oplen = 1; | |
1826 | int args = 0; | |
1827 | ||
1828 | switch (exp->elts[pc - 1].opcode) | |
1829 | { | |
1830 | case OP_AGGREGATE: | |
1831 | /* We handle aggregate as a type and argument count. The first | |
1832 | argument might be OP_OTHERS. After that the arguments | |
1833 | alternate: first an OP_NAME, then an expression. */ | |
1834 | oplen = 4; | |
1835 | args = longest_to_int (exp->elts[pc - 2].longconst); | |
1836 | break; | |
1837 | ||
1838 | case OP_OTHERS: | |
1839 | oplen = 1; | |
1840 | args = 1; | |
1841 | break; | |
1842 | ||
1843 | case STRUCTOP_ANONYMOUS: | |
1844 | oplen = 3; | |
1845 | args = 1; | |
1846 | break; | |
1847 | ||
1848 | case OP_RUST_ARRAY: | |
1849 | oplen = 1; | |
1850 | args = 2; | |
1851 | break; | |
1852 | ||
1853 | default: | |
1854 | operator_length_standard (exp, pc, oplenp, argsp); | |
1855 | return; | |
1856 | } | |
1857 | ||
1858 | *oplenp = oplen; | |
1859 | *argsp = args; | |
1860 | } | |
1861 | ||
1862 | /* op_name implementation for Rust. */ | |
1863 | ||
a121b7c1 | 1864 | static const char * |
c44af4eb TT |
1865 | rust_op_name (enum exp_opcode opcode) |
1866 | { | |
1867 | switch (opcode) | |
1868 | { | |
1869 | case OP_AGGREGATE: | |
1870 | return "OP_AGGREGATE"; | |
1871 | case OP_OTHERS: | |
1872 | return "OP_OTHERS"; | |
1873 | default: | |
1874 | return op_name_standard (opcode); | |
1875 | } | |
1876 | } | |
1877 | ||
1878 | /* dump_subexp_body implementation for Rust. */ | |
1879 | ||
1880 | static int | |
1881 | rust_dump_subexp_body (struct expression *exp, struct ui_file *stream, | |
1882 | int elt) | |
1883 | { | |
1884 | switch (exp->elts[elt].opcode) | |
1885 | { | |
1886 | case OP_AGGREGATE: | |
1887 | { | |
1888 | int length = longest_to_int (exp->elts[elt + 2].longconst); | |
1889 | int i; | |
1890 | ||
1891 | fprintf_filtered (stream, "Type @"); | |
1892 | gdb_print_host_address (exp->elts[elt + 1].type, stream); | |
1893 | fprintf_filtered (stream, " ("); | |
1894 | type_print (exp->elts[elt + 1].type, NULL, stream, 0); | |
1895 | fprintf_filtered (stream, "), length %d", length); | |
1896 | ||
1897 | elt += 4; | |
1898 | for (i = 0; i < length; ++i) | |
1899 | elt = dump_subexp (exp, stream, elt); | |
1900 | } | |
1901 | break; | |
1902 | ||
1903 | case OP_STRING: | |
1904 | case OP_NAME: | |
1905 | { | |
1906 | LONGEST len = exp->elts[elt + 1].longconst; | |
1907 | ||
1908 | fprintf_filtered (stream, "%s: %s", | |
1909 | (exp->elts[elt].opcode == OP_STRING | |
1910 | ? "string" : "name"), | |
1911 | &exp->elts[elt + 2].string); | |
1912 | elt += 4 + BYTES_TO_EXP_ELEM (len + 1); | |
1913 | } | |
1914 | break; | |
1915 | ||
1916 | case OP_OTHERS: | |
1917 | elt = dump_subexp (exp, stream, elt + 1); | |
1918 | break; | |
1919 | ||
1920 | case STRUCTOP_ANONYMOUS: | |
1921 | { | |
1922 | int field_number; | |
1923 | ||
68f2f2e3 | 1924 | field_number = longest_to_int (exp->elts[elt + 1].longconst); |
c44af4eb TT |
1925 | |
1926 | fprintf_filtered (stream, "Field number: %d", field_number); | |
68f2f2e3 | 1927 | elt = dump_subexp (exp, stream, elt + 3); |
c44af4eb TT |
1928 | } |
1929 | break; | |
1930 | ||
1931 | case OP_RUST_ARRAY: | |
68f2f2e3 | 1932 | ++elt; |
c44af4eb TT |
1933 | break; |
1934 | ||
1935 | default: | |
1936 | elt = dump_subexp_body_standard (exp, stream, elt); | |
1937 | break; | |
1938 | } | |
1939 | ||
1940 | return elt; | |
1941 | } | |
1942 | ||
1943 | /* print_subexp implementation for Rust. */ | |
1944 | ||
1945 | static void | |
1946 | rust_print_subexp (struct expression *exp, int *pos, struct ui_file *stream, | |
1947 | enum precedence prec) | |
1948 | { | |
1949 | switch (exp->elts[*pos].opcode) | |
1950 | { | |
1951 | case OP_AGGREGATE: | |
1952 | { | |
1953 | int length = longest_to_int (exp->elts[*pos + 2].longconst); | |
1954 | int i; | |
1955 | ||
1956 | type_print (exp->elts[*pos + 1].type, "", stream, 0); | |
1957 | fputs_filtered (" { ", stream); | |
1958 | ||
1959 | *pos += 4; | |
1960 | for (i = 0; i < length; ++i) | |
1961 | { | |
1962 | rust_print_subexp (exp, pos, stream, prec); | |
1963 | fputs_filtered (", ", stream); | |
1964 | } | |
1965 | fputs_filtered (" }", stream); | |
1966 | } | |
1967 | break; | |
1968 | ||
1969 | case OP_NAME: | |
1970 | { | |
1971 | LONGEST len = exp->elts[*pos + 1].longconst; | |
1972 | ||
1973 | fputs_filtered (&exp->elts[*pos + 2].string, stream); | |
1974 | *pos += 4 + BYTES_TO_EXP_ELEM (len + 1); | |
1975 | } | |
1976 | break; | |
1977 | ||
1978 | case OP_OTHERS: | |
1979 | { | |
1980 | fputs_filtered ("<<others>> (", stream); | |
1981 | ++*pos; | |
1982 | rust_print_subexp (exp, pos, stream, prec); | |
1983 | fputs_filtered (")", stream); | |
1984 | } | |
1985 | break; | |
1986 | ||
1987 | case STRUCTOP_ANONYMOUS: | |
1988 | { | |
1989 | int tem = longest_to_int (exp->elts[*pos + 1].longconst); | |
1990 | ||
1991 | (*pos) += 3; | |
1992 | print_subexp (exp, pos, stream, PREC_SUFFIX); | |
1993 | fprintf_filtered (stream, ".%d", tem); | |
1994 | } | |
256afbc2 | 1995 | break; |
c44af4eb TT |
1996 | |
1997 | case OP_RUST_ARRAY: | |
1998 | ++*pos; | |
1999 | fprintf_filtered (stream, "["); | |
2000 | rust_print_subexp (exp, pos, stream, prec); | |
2001 | fprintf_filtered (stream, "; "); | |
2002 | rust_print_subexp (exp, pos, stream, prec); | |
2003 | fprintf_filtered (stream, "]"); | |
2004 | break; | |
2005 | ||
2006 | default: | |
2007 | print_subexp_standard (exp, pos, stream, prec); | |
2008 | break; | |
2009 | } | |
2010 | } | |
2011 | ||
2012 | /* operator_check implementation for Rust. */ | |
2013 | ||
2014 | static int | |
2015 | rust_operator_check (struct expression *exp, int pos, | |
2016 | int (*objfile_func) (struct objfile *objfile, | |
2017 | void *data), | |
2018 | void *data) | |
2019 | { | |
2020 | switch (exp->elts[pos].opcode) | |
2021 | { | |
2022 | case OP_AGGREGATE: | |
2023 | { | |
2024 | struct type *type = exp->elts[pos + 1].type; | |
2025 | struct objfile *objfile = TYPE_OBJFILE (type); | |
2026 | ||
2027 | if (objfile != NULL && (*objfile_func) (objfile, data)) | |
2028 | return 1; | |
2029 | } | |
2030 | break; | |
2031 | ||
2032 | case OP_OTHERS: | |
2033 | case OP_NAME: | |
2034 | case OP_RUST_ARRAY: | |
2035 | break; | |
2036 | ||
2037 | default: | |
2038 | return operator_check_standard (exp, pos, objfile_func, data); | |
2039 | } | |
2040 | ||
2041 | return 0; | |
2042 | } | |
2043 | ||
2044 | \f | |
2045 | ||
2046 | /* Implementation of la_lookup_symbol_nonlocal for Rust. */ | |
2047 | ||
2048 | static struct block_symbol | |
2049 | rust_lookup_symbol_nonlocal (const struct language_defn *langdef, | |
2050 | const char *name, | |
2051 | const struct block *block, | |
2052 | const domain_enum domain) | |
2053 | { | |
6640a367 | 2054 | struct block_symbol result = {}; |
c44af4eb TT |
2055 | |
2056 | if (symbol_lookup_debug) | |
2057 | { | |
2058 | fprintf_unfiltered (gdb_stdlog, | |
2059 | "rust_lookup_symbol_non_local" | |
2060 | " (%s, %s (scope %s), %s)\n", | |
2061 | name, host_address_to_string (block), | |
2062 | block_scope (block), domain_name (domain)); | |
2063 | } | |
2064 | ||
2065 | /* Look up bare names in the block's scope. */ | |
fcfcc376 | 2066 | std::string scopedname; |
c44af4eb TT |
2067 | if (name[cp_find_first_component (name)] == '\0') |
2068 | { | |
2069 | const char *scope = block_scope (block); | |
2070 | ||
2071 | if (scope[0] != '\0') | |
2072 | { | |
fcfcc376 TT |
2073 | scopedname = std::string (scope) + "::" + name; |
2074 | name = scopedname.c_str (); | |
c44af4eb | 2075 | } |
fcfcc376 TT |
2076 | else |
2077 | name = NULL; | |
2078 | } | |
2079 | ||
2080 | if (name != NULL) | |
2081 | { | |
2082 | result = lookup_symbol_in_static_block (name, block, domain); | |
2083 | if (result.symbol == NULL) | |
2084 | result = lookup_global_symbol (name, block, domain); | |
c44af4eb TT |
2085 | } |
2086 | return result; | |
2087 | } | |
2088 | ||
2089 | \f | |
2090 | ||
8b302db8 TT |
2091 | /* la_sniff_from_mangled_name for Rust. */ |
2092 | ||
2093 | static int | |
2094 | rust_sniff_from_mangled_name (const char *mangled, char **demangled) | |
2095 | { | |
2096 | *demangled = gdb_demangle (mangled, DMGL_PARAMS | DMGL_ANSI); | |
2097 | return *demangled != NULL; | |
2098 | } | |
2099 | ||
2100 | \f | |
2101 | ||
43cc5389 TT |
2102 | /* la_watch_location_expression for Rust. */ |
2103 | ||
2104 | static gdb::unique_xmalloc_ptr<char> | |
2105 | rust_watch_location_expression (struct type *type, CORE_ADDR addr) | |
2106 | { | |
2107 | type = check_typedef (TYPE_TARGET_TYPE (check_typedef (type))); | |
2108 | std::string name = type_to_string (type); | |
2109 | return gdb::unique_xmalloc_ptr<char> | |
2110 | (xstrprintf ("*(%s as *mut %s)", core_addr_to_string (addr), | |
2111 | name.c_str ())); | |
2112 | } | |
2113 | ||
2114 | \f | |
2115 | ||
c44af4eb TT |
2116 | static const struct exp_descriptor exp_descriptor_rust = |
2117 | { | |
2118 | rust_print_subexp, | |
2119 | rust_operator_length, | |
2120 | rust_operator_check, | |
2121 | rust_op_name, | |
2122 | rust_dump_subexp_body, | |
2123 | rust_evaluate_subexp | |
2124 | }; | |
2125 | ||
56618e20 TT |
2126 | static const char *rust_extensions[] = |
2127 | { | |
2128 | ".rs", NULL | |
2129 | }; | |
2130 | ||
47e77640 | 2131 | extern const struct language_defn rust_language_defn = |
c44af4eb TT |
2132 | { |
2133 | "rust", | |
2134 | "Rust", | |
2135 | language_rust, | |
2136 | range_check_on, | |
2137 | case_sensitive_on, | |
2138 | array_row_major, | |
2139 | macro_expansion_no, | |
56618e20 | 2140 | rust_extensions, |
c44af4eb TT |
2141 | &exp_descriptor_rust, |
2142 | rust_parse, | |
c44af4eb TT |
2143 | null_post_parser, |
2144 | rust_printchar, /* Print a character constant */ | |
2145 | rust_printstr, /* Function to print string constant */ | |
2146 | rust_emitchar, /* Print a single char */ | |
2147 | rust_print_type, /* Print a type using appropriate syntax */ | |
2148 | rust_print_typedef, /* Print a typedef using appropriate syntax */ | |
2149 | rust_val_print, /* Print a value using appropriate syntax */ | |
2150 | c_value_print, /* Print a top-level value */ | |
2151 | default_read_var_value, /* la_read_var_value */ | |
2152 | NULL, /* Language specific skip_trampoline */ | |
2153 | NULL, /* name_of_this */ | |
59cc4834 | 2154 | false, /* la_store_sym_names_in_linkage_form_p */ |
c44af4eb TT |
2155 | rust_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */ |
2156 | basic_lookup_transparent_type,/* lookup_transparent_type */ | |
2157 | gdb_demangle, /* Language specific symbol demangler */ | |
8b302db8 | 2158 | rust_sniff_from_mangled_name, |
c44af4eb TT |
2159 | NULL, /* Language specific |
2160 | class_name_from_physname */ | |
2161 | c_op_print_tab, /* expression operators for printing */ | |
2162 | 1, /* c-style arrays */ | |
2163 | 0, /* String lower bound */ | |
2164 | default_word_break_characters, | |
eb3ff9a5 | 2165 | default_collect_symbol_completion_matches, |
c44af4eb TT |
2166 | rust_language_arch_info, |
2167 | default_print_array_index, | |
2168 | default_pass_by_reference, | |
43cc5389 | 2169 | rust_watch_location_expression, |
b5ec771e | 2170 | NULL, /* la_get_symbol_name_matcher */ |
c44af4eb | 2171 | iterate_over_symbols, |
5ffa0793 | 2172 | default_search_name_hash, |
c44af4eb TT |
2173 | &default_varobj_ops, |
2174 | NULL, | |
721b08c6 | 2175 | NULL, |
4be290b2 | 2176 | rust_is_string_type_p, |
721b08c6 | 2177 | "{...}" /* la_struct_too_deep_ellipsis */ |
c44af4eb | 2178 | }; |