Commit | Line | Data |
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c906108c | 1 | /* Evaluate expressions for GDB. |
1bac305b | 2 | |
3666a048 | 3 | Copyright (C) 1986-2021 Free Software Foundation, Inc. |
c906108c | 4 | |
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 10 | (at your option) any later version. |
c906108c | 11 | |
c5aa993b JM |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
c906108c | 16 | |
c5aa993b | 17 | You should have received a copy of the GNU General Public License |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
19 | |
20 | #include "defs.h" | |
4de283e4 TT |
21 | #include "symtab.h" |
22 | #include "gdbtypes.h" | |
23 | #include "value.h" | |
c906108c | 24 | #include "expression.h" |
4de283e4 | 25 | #include "target.h" |
c906108c | 26 | #include "frame.h" |
6c659fc2 | 27 | #include "gdbthread.h" |
4de283e4 | 28 | #include "language.h" /* For CAST_IS_CONVERSION. */ |
4de283e4 | 29 | #include "cp-abi.h" |
04714b91 | 30 | #include "infcall.h" |
a9fa03de | 31 | #include "objc-lang.h" |
4de283e4 | 32 | #include "block.h" |
5f9769d1 | 33 | #include "parser-defs.h" |
4de283e4 | 34 | #include "cp-support.h" |
d55e5aa6 | 35 | #include "ui-out.h" |
4de283e4 | 36 | #include "regcache.h" |
029a67e4 | 37 | #include "user-regs.h" |
79a45b7d | 38 | #include "valprint.h" |
4de283e4 TT |
39 | #include "gdb_obstack.h" |
40 | #include "objfiles.h" | |
41 | #include "typeprint.h" | |
42 | #include <ctype.h> | |
bc3b79fd | 43 | |
0963b4bd | 44 | /* Prototypes for local functions. */ |
c906108c | 45 | |
5ecaaa66 SA |
46 | static struct value *evaluate_subexp_for_sizeof (struct expression *, int *, |
47 | enum noside); | |
c906108c | 48 | |
61051030 AC |
49 | static struct value *evaluate_subexp_for_address (struct expression *, |
50 | int *, enum noside); | |
c906108c | 51 | |
46a4882b PA |
52 | static value *evaluate_subexp_for_cast (expression *exp, int *pos, |
53 | enum noside noside, | |
54 | struct type *type); | |
55 | ||
61051030 AC |
56 | static struct value *evaluate_struct_tuple (struct value *, |
57 | struct expression *, int *, | |
58 | enum noside, int); | |
c906108c | 59 | |
4b27a620 | 60 | struct value * |
aa1ee363 AC |
61 | evaluate_subexp (struct type *expect_type, struct expression *exp, |
62 | int *pos, enum noside noside) | |
c906108c | 63 | { |
26f53cd3 TT |
64 | return ((*exp->language_defn->expression_ops ()->evaluate_exp) |
65 | (expect_type, exp, pos, noside)); | |
c906108c SS |
66 | } |
67 | \f | |
68 | /* Parse the string EXP as a C expression, evaluate it, | |
69 | and return the result as a number. */ | |
70 | ||
71 | CORE_ADDR | |
bbc13ae3 | 72 | parse_and_eval_address (const char *exp) |
c906108c | 73 | { |
4d01a485 PA |
74 | expression_up expr = parse_expression (exp); |
75 | ||
76 | return value_as_address (evaluate_expression (expr.get ())); | |
c906108c SS |
77 | } |
78 | ||
bb518678 | 79 | /* Like parse_and_eval_address, but treats the value of the expression |
0963b4bd | 80 | as an integer, not an address, returns a LONGEST, not a CORE_ADDR. */ |
bb518678 | 81 | LONGEST |
a1b8c4cc | 82 | parse_and_eval_long (const char *exp) |
bb518678 | 83 | { |
4d01a485 PA |
84 | expression_up expr = parse_expression (exp); |
85 | ||
86 | return value_as_long (evaluate_expression (expr.get ())); | |
bb518678 DT |
87 | } |
88 | ||
61051030 | 89 | struct value * |
bbc13ae3 | 90 | parse_and_eval (const char *exp) |
c906108c | 91 | { |
4d01a485 | 92 | expression_up expr = parse_expression (exp); |
c906108c | 93 | |
4d01a485 | 94 | return evaluate_expression (expr.get ()); |
c906108c SS |
95 | } |
96 | ||
97 | /* Parse up to a comma (or to a closeparen) | |
98 | in the string EXPP as an expression, evaluate it, and return the value. | |
99 | EXPP is advanced to point to the comma. */ | |
100 | ||
61051030 | 101 | struct value * |
bbc13ae3 | 102 | parse_to_comma_and_eval (const char **expp) |
c906108c | 103 | { |
582942f4 | 104 | expression_up expr = parse_exp_1 (expp, 0, nullptr, 1); |
c906108c | 105 | |
4d01a485 | 106 | return evaluate_expression (expr.get ()); |
c906108c SS |
107 | } |
108 | \f | |
c906108c | 109 | |
26f53cd3 TT |
110 | /* See expression.h. */ |
111 | ||
112 | struct value * | |
113 | expression::evaluate (struct type *expect_type, enum noside noside) | |
114 | { | |
115 | gdb::optional<enable_thread_stack_temporaries> stack_temporaries; | |
116 | if (target_has_execution () | |
117 | && language_defn->la_language == language_cplus | |
118 | && !thread_stack_temporaries_enabled_p (inferior_thread ())) | |
119 | stack_temporaries.emplace (inferior_thread ()); | |
120 | ||
121 | int pos = 0; | |
122 | struct value *retval = evaluate_subexp (expect_type, this, &pos, noside); | |
123 | ||
124 | if (stack_temporaries.has_value () | |
125 | && value_in_thread_stack_temporaries (retval, inferior_thread ())) | |
126 | retval = value_non_lval (retval); | |
127 | ||
128 | return retval; | |
129 | } | |
130 | ||
efd7ff14 | 131 | /* See value.h. */ |
c906108c | 132 | |
61051030 | 133 | struct value * |
efd7ff14 | 134 | evaluate_expression (struct expression *exp, struct type *expect_type) |
c906108c | 135 | { |
26f53cd3 | 136 | return exp->evaluate (expect_type, EVAL_NORMAL); |
c906108c SS |
137 | } |
138 | ||
139 | /* Evaluate an expression, avoiding all memory references | |
140 | and getting a value whose type alone is correct. */ | |
141 | ||
61051030 | 142 | struct value * |
fba45db2 | 143 | evaluate_type (struct expression *exp) |
c906108c | 144 | { |
26f53cd3 | 145 | return exp->evaluate (nullptr, EVAL_AVOID_SIDE_EFFECTS); |
c906108c SS |
146 | } |
147 | ||
65d12d83 TT |
148 | /* Evaluate a subexpression, avoiding all memory references and |
149 | getting a value whose type alone is correct. */ | |
150 | ||
151 | struct value * | |
152 | evaluate_subexpression_type (struct expression *exp, int subexp) | |
153 | { | |
fe1fe7ea | 154 | return evaluate_subexp (nullptr, exp, &subexp, EVAL_AVOID_SIDE_EFFECTS); |
65d12d83 TT |
155 | } |
156 | ||
0cf6dd15 TJB |
157 | /* Find the current value of a watchpoint on EXP. Return the value in |
158 | *VALP and *RESULTP and the chain of intermediate and final values | |
159 | in *VAL_CHAIN. RESULTP and VAL_CHAIN may be NULL if the caller does | |
160 | not need them. | |
161 | ||
3a1115a0 TT |
162 | If PRESERVE_ERRORS is true, then exceptions are passed through. |
163 | Otherwise, if PRESERVE_ERRORS is false, then if a memory error | |
164 | occurs while evaluating the expression, *RESULTP will be set to | |
165 | NULL. *RESULTP may be a lazy value, if the result could not be | |
166 | read from memory. It is used to determine whether a value is | |
167 | user-specified (we should watch the whole value) or intermediate | |
0cf6dd15 TJB |
168 | (we should watch only the bit used to locate the final value). |
169 | ||
170 | If the final value, or any intermediate value, could not be read | |
171 | from memory, *VALP will be set to NULL. *VAL_CHAIN will still be | |
172 | set to any referenced values. *VALP will never be a lazy value. | |
173 | This is the value which we store in struct breakpoint. | |
174 | ||
a6535de1 TT |
175 | If VAL_CHAIN is non-NULL, the values put into *VAL_CHAIN will be |
176 | released from the value chain. If VAL_CHAIN is NULL, all generated | |
177 | values will be left on the value chain. */ | |
0cf6dd15 TJB |
178 | |
179 | void | |
180 | fetch_subexp_value (struct expression *exp, int *pc, struct value **valp, | |
a6535de1 TT |
181 | struct value **resultp, |
182 | std::vector<value_ref_ptr> *val_chain, | |
2e362716 | 183 | bool preserve_errors) |
0cf6dd15 TJB |
184 | { |
185 | struct value *mark, *new_mark, *result; | |
0cf6dd15 TJB |
186 | |
187 | *valp = NULL; | |
188 | if (resultp) | |
189 | *resultp = NULL; | |
190 | if (val_chain) | |
a6535de1 | 191 | val_chain->clear (); |
0cf6dd15 TJB |
192 | |
193 | /* Evaluate the expression. */ | |
194 | mark = value_mark (); | |
195 | result = NULL; | |
196 | ||
a70b8144 | 197 | try |
0cf6dd15 | 198 | { |
fe1fe7ea | 199 | result = evaluate_subexp (nullptr, exp, pc, EVAL_NORMAL); |
0cf6dd15 | 200 | } |
230d2906 | 201 | catch (const gdb_exception &ex) |
0cf6dd15 | 202 | { |
3a1115a0 | 203 | /* Ignore memory errors if we want watchpoints pointing at |
0cf6dd15 TJB |
204 | inaccessible memory to still be created; otherwise, throw the |
205 | error to some higher catcher. */ | |
206 | switch (ex.error) | |
207 | { | |
208 | case MEMORY_ERROR: | |
3a1115a0 TT |
209 | if (!preserve_errors) |
210 | break; | |
565e0eda | 211 | /* Fall through. */ |
0cf6dd15 | 212 | default: |
eedc3f4f | 213 | throw; |
0cf6dd15 TJB |
214 | break; |
215 | } | |
216 | } | |
217 | ||
218 | new_mark = value_mark (); | |
219 | if (mark == new_mark) | |
220 | return; | |
221 | if (resultp) | |
222 | *resultp = result; | |
223 | ||
224 | /* Make sure it's not lazy, so that after the target stops again we | |
225 | have a non-lazy previous value to compare with. */ | |
8e7b59a5 KS |
226 | if (result != NULL) |
227 | { | |
228 | if (!value_lazy (result)) | |
229 | *valp = result; | |
230 | else | |
231 | { | |
8e7b59a5 | 232 | |
a70b8144 | 233 | try |
8e7b59a5 KS |
234 | { |
235 | value_fetch_lazy (result); | |
236 | *valp = result; | |
237 | } | |
230d2906 | 238 | catch (const gdb_exception_error &except) |
492d29ea PA |
239 | { |
240 | } | |
8e7b59a5 KS |
241 | } |
242 | } | |
0cf6dd15 TJB |
243 | |
244 | if (val_chain) | |
245 | { | |
246 | /* Return the chain of intermediate values. We use this to | |
247 | decide which addresses to watch. */ | |
a6535de1 | 248 | *val_chain = value_release_to_mark (mark); |
0cf6dd15 TJB |
249 | } |
250 | } | |
251 | ||
65d12d83 TT |
252 | /* Extract a field operation from an expression. If the subexpression |
253 | of EXP starting at *SUBEXP is not a structure dereference | |
254 | operation, return NULL. Otherwise, return the name of the | |
255 | dereferenced field, and advance *SUBEXP to point to the | |
256 | subexpression of the left-hand-side of the dereference. This is | |
257 | used when completing field names. */ | |
258 | ||
3eac2b65 | 259 | const char * |
65d12d83 TT |
260 | extract_field_op (struct expression *exp, int *subexp) |
261 | { | |
262 | int tem; | |
263 | char *result; | |
d7f9d729 | 264 | |
65d12d83 TT |
265 | if (exp->elts[*subexp].opcode != STRUCTOP_STRUCT |
266 | && exp->elts[*subexp].opcode != STRUCTOP_PTR) | |
267 | return NULL; | |
268 | tem = longest_to_int (exp->elts[*subexp + 1].longconst); | |
269 | result = &exp->elts[*subexp + 2].string; | |
270 | (*subexp) += 1 + 3 + BYTES_TO_EXP_ELEM (tem + 1); | |
271 | return result; | |
272 | } | |
273 | ||
f0559fff YQ |
274 | /* This function evaluates brace-initializers (in C/C++) for |
275 | structure types. */ | |
c906108c | 276 | |
61051030 AC |
277 | static struct value * |
278 | evaluate_struct_tuple (struct value *struct_val, | |
aa1ee363 AC |
279 | struct expression *exp, |
280 | int *pos, enum noside noside, int nargs) | |
c906108c | 281 | { |
df407dfe | 282 | struct type *struct_type = check_typedef (value_type (struct_val)); |
c906108c SS |
283 | struct type *field_type; |
284 | int fieldno = -1; | |
d7f9d729 | 285 | |
c5aa993b | 286 | while (--nargs >= 0) |
c906108c | 287 | { |
61051030 | 288 | struct value *val = NULL; |
c906108c | 289 | int bitpos, bitsize; |
0fd88904 | 290 | bfd_byte *addr; |
c5aa993b | 291 | |
f0559fff YQ |
292 | fieldno++; |
293 | /* Skip static fields. */ | |
1f704f76 | 294 | while (fieldno < struct_type->num_fields () |
ceacbf6e | 295 | && field_is_static (&struct_type->field (fieldno))) |
f0559fff | 296 | fieldno++; |
1f704f76 | 297 | if (fieldno >= struct_type->num_fields ()) |
f0559fff | 298 | error (_("too many initializers")); |
940da03e | 299 | field_type = struct_type->field (fieldno).type (); |
78134374 | 300 | if (field_type->code () == TYPE_CODE_UNION |
f0559fff YQ |
301 | && TYPE_FIELD_NAME (struct_type, fieldno)[0] == '0') |
302 | error (_("don't know which variant you want to set")); | |
303 | ||
304 | /* Here, struct_type is the type of the inner struct, | |
305 | while substruct_type is the type of the inner struct. | |
306 | These are the same for normal structures, but a variant struct | |
307 | contains anonymous union fields that contain substruct fields. | |
308 | The value fieldno is the index of the top-level (normal or | |
309 | anonymous union) field in struct_field, while the value | |
310 | subfieldno is the index of the actual real (named inner) field | |
311 | in substruct_type. */ | |
312 | ||
940da03e | 313 | field_type = struct_type->field (fieldno).type (); |
f0559fff YQ |
314 | if (val == 0) |
315 | val = evaluate_subexp (field_type, exp, pos, noside); | |
316 | ||
317 | /* Now actually set the field in struct_val. */ | |
318 | ||
319 | /* Assign val to field fieldno. */ | |
320 | if (value_type (val) != field_type) | |
321 | val = value_cast (field_type, val); | |
322 | ||
323 | bitsize = TYPE_FIELD_BITSIZE (struct_type, fieldno); | |
324 | bitpos = TYPE_FIELD_BITPOS (struct_type, fieldno); | |
325 | addr = value_contents_writeable (struct_val) + bitpos / 8; | |
326 | if (bitsize) | |
327 | modify_field (struct_type, addr, | |
328 | value_as_long (val), bitpos % 8, bitsize); | |
329 | else | |
330 | memcpy (addr, value_contents (val), | |
331 | TYPE_LENGTH (value_type (val))); | |
c906108c | 332 | |
c906108c SS |
333 | } |
334 | return struct_val; | |
335 | } | |
336 | ||
4066e646 UW |
337 | /* Promote value ARG1 as appropriate before performing a unary operation |
338 | on this argument. | |
339 | If the result is not appropriate for any particular language then it | |
340 | needs to patch this function. */ | |
341 | ||
342 | void | |
343 | unop_promote (const struct language_defn *language, struct gdbarch *gdbarch, | |
344 | struct value **arg1) | |
345 | { | |
346 | struct type *type1; | |
347 | ||
348 | *arg1 = coerce_ref (*arg1); | |
349 | type1 = check_typedef (value_type (*arg1)); | |
350 | ||
351 | if (is_integral_type (type1)) | |
352 | { | |
353 | switch (language->la_language) | |
354 | { | |
355 | default: | |
356 | /* Perform integral promotion for ANSI C/C++. | |
85102364 | 357 | If not appropriate for any particular language |
4066e646 UW |
358 | it needs to modify this function. */ |
359 | { | |
360 | struct type *builtin_int = builtin_type (gdbarch)->builtin_int; | |
d7f9d729 | 361 | |
4066e646 UW |
362 | if (TYPE_LENGTH (type1) < TYPE_LENGTH (builtin_int)) |
363 | *arg1 = value_cast (builtin_int, *arg1); | |
364 | } | |
365 | break; | |
366 | } | |
367 | } | |
368 | } | |
369 | ||
370 | /* Promote values ARG1 and ARG2 as appropriate before performing a binary | |
371 | operation on those two operands. | |
372 | If the result is not appropriate for any particular language then it | |
373 | needs to patch this function. */ | |
374 | ||
375 | void | |
376 | binop_promote (const struct language_defn *language, struct gdbarch *gdbarch, | |
377 | struct value **arg1, struct value **arg2) | |
378 | { | |
379 | struct type *promoted_type = NULL; | |
380 | struct type *type1; | |
381 | struct type *type2; | |
382 | ||
383 | *arg1 = coerce_ref (*arg1); | |
384 | *arg2 = coerce_ref (*arg2); | |
385 | ||
386 | type1 = check_typedef (value_type (*arg1)); | |
387 | type2 = check_typedef (value_type (*arg2)); | |
388 | ||
78134374 SM |
389 | if ((type1->code () != TYPE_CODE_FLT |
390 | && type1->code () != TYPE_CODE_DECFLOAT | |
4066e646 | 391 | && !is_integral_type (type1)) |
78134374 SM |
392 | || (type2->code () != TYPE_CODE_FLT |
393 | && type2->code () != TYPE_CODE_DECFLOAT | |
4066e646 UW |
394 | && !is_integral_type (type2))) |
395 | return; | |
396 | ||
0a12719e JB |
397 | if (is_fixed_point_type (type1) || is_fixed_point_type (type2)) |
398 | return; | |
399 | ||
78134374 SM |
400 | if (type1->code () == TYPE_CODE_DECFLOAT |
401 | || type2->code () == TYPE_CODE_DECFLOAT) | |
4066e646 UW |
402 | { |
403 | /* No promotion required. */ | |
404 | } | |
78134374 SM |
405 | else if (type1->code () == TYPE_CODE_FLT |
406 | || type2->code () == TYPE_CODE_FLT) | |
4066e646 UW |
407 | { |
408 | switch (language->la_language) | |
409 | { | |
410 | case language_c: | |
411 | case language_cplus: | |
412 | case language_asm: | |
413 | case language_objc: | |
f4b8a18d | 414 | case language_opencl: |
4066e646 UW |
415 | /* No promotion required. */ |
416 | break; | |
417 | ||
418 | default: | |
419 | /* For other languages the result type is unchanged from gdb | |
420 | version 6.7 for backward compatibility. | |
421 | If either arg was long double, make sure that value is also long | |
422 | double. Otherwise use double. */ | |
423 | if (TYPE_LENGTH (type1) * 8 > gdbarch_double_bit (gdbarch) | |
424 | || TYPE_LENGTH (type2) * 8 > gdbarch_double_bit (gdbarch)) | |
425 | promoted_type = builtin_type (gdbarch)->builtin_long_double; | |
426 | else | |
427 | promoted_type = builtin_type (gdbarch)->builtin_double; | |
428 | break; | |
429 | } | |
430 | } | |
78134374 SM |
431 | else if (type1->code () == TYPE_CODE_BOOL |
432 | && type2->code () == TYPE_CODE_BOOL) | |
4066e646 UW |
433 | { |
434 | /* No promotion required. */ | |
435 | } | |
436 | else | |
437 | /* Integral operations here. */ | |
438 | /* FIXME: Also mixed integral/booleans, with result an integer. */ | |
439 | { | |
440 | const struct builtin_type *builtin = builtin_type (gdbarch); | |
441 | unsigned int promoted_len1 = TYPE_LENGTH (type1); | |
442 | unsigned int promoted_len2 = TYPE_LENGTH (type2); | |
c6d940a9 SM |
443 | int is_unsigned1 = type1->is_unsigned (); |
444 | int is_unsigned2 = type2->is_unsigned (); | |
4066e646 UW |
445 | unsigned int result_len; |
446 | int unsigned_operation; | |
447 | ||
448 | /* Determine type length and signedness after promotion for | |
dda83cd7 | 449 | both operands. */ |
4066e646 UW |
450 | if (promoted_len1 < TYPE_LENGTH (builtin->builtin_int)) |
451 | { | |
452 | is_unsigned1 = 0; | |
453 | promoted_len1 = TYPE_LENGTH (builtin->builtin_int); | |
454 | } | |
455 | if (promoted_len2 < TYPE_LENGTH (builtin->builtin_int)) | |
456 | { | |
457 | is_unsigned2 = 0; | |
458 | promoted_len2 = TYPE_LENGTH (builtin->builtin_int); | |
459 | } | |
460 | ||
461 | if (promoted_len1 > promoted_len2) | |
462 | { | |
463 | unsigned_operation = is_unsigned1; | |
464 | result_len = promoted_len1; | |
465 | } | |
466 | else if (promoted_len2 > promoted_len1) | |
467 | { | |
468 | unsigned_operation = is_unsigned2; | |
469 | result_len = promoted_len2; | |
470 | } | |
471 | else | |
472 | { | |
473 | unsigned_operation = is_unsigned1 || is_unsigned2; | |
474 | result_len = promoted_len1; | |
475 | } | |
476 | ||
477 | switch (language->la_language) | |
478 | { | |
479 | case language_c: | |
480 | case language_cplus: | |
481 | case language_asm: | |
482 | case language_objc: | |
483 | if (result_len <= TYPE_LENGTH (builtin->builtin_int)) | |
484 | { | |
485 | promoted_type = (unsigned_operation | |
486 | ? builtin->builtin_unsigned_int | |
487 | : builtin->builtin_int); | |
488 | } | |
489 | else if (result_len <= TYPE_LENGTH (builtin->builtin_long)) | |
490 | { | |
491 | promoted_type = (unsigned_operation | |
492 | ? builtin->builtin_unsigned_long | |
493 | : builtin->builtin_long); | |
494 | } | |
495 | else | |
496 | { | |
497 | promoted_type = (unsigned_operation | |
498 | ? builtin->builtin_unsigned_long_long | |
499 | : builtin->builtin_long_long); | |
500 | } | |
501 | break; | |
f4b8a18d KW |
502 | case language_opencl: |
503 | if (result_len <= TYPE_LENGTH (lookup_signed_typename | |
b858499d | 504 | (language, "int"))) |
f4b8a18d KW |
505 | { |
506 | promoted_type = | |
507 | (unsigned_operation | |
b858499d SM |
508 | ? lookup_unsigned_typename (language, "int") |
509 | : lookup_signed_typename (language, "int")); | |
f4b8a18d KW |
510 | } |
511 | else if (result_len <= TYPE_LENGTH (lookup_signed_typename | |
b858499d | 512 | (language, "long"))) |
f4b8a18d KW |
513 | { |
514 | promoted_type = | |
515 | (unsigned_operation | |
b858499d SM |
516 | ? lookup_unsigned_typename (language, "long") |
517 | : lookup_signed_typename (language,"long")); | |
f4b8a18d KW |
518 | } |
519 | break; | |
4066e646 UW |
520 | default: |
521 | /* For other languages the result type is unchanged from gdb | |
522 | version 6.7 for backward compatibility. | |
523 | If either arg was long long, make sure that value is also long | |
524 | long. Otherwise use long. */ | |
525 | if (unsigned_operation) | |
526 | { | |
527 | if (result_len > gdbarch_long_bit (gdbarch) / HOST_CHAR_BIT) | |
528 | promoted_type = builtin->builtin_unsigned_long_long; | |
529 | else | |
530 | promoted_type = builtin->builtin_unsigned_long; | |
531 | } | |
532 | else | |
533 | { | |
534 | if (result_len > gdbarch_long_bit (gdbarch) / HOST_CHAR_BIT) | |
535 | promoted_type = builtin->builtin_long_long; | |
536 | else | |
537 | promoted_type = builtin->builtin_long; | |
538 | } | |
539 | break; | |
540 | } | |
541 | } | |
542 | ||
543 | if (promoted_type) | |
544 | { | |
545 | /* Promote both operands to common type. */ | |
546 | *arg1 = value_cast (promoted_type, *arg1); | |
547 | *arg2 = value_cast (promoted_type, *arg2); | |
548 | } | |
549 | } | |
550 | ||
89eef114 | 551 | static int |
cc73bb8c | 552 | ptrmath_type_p (const struct language_defn *lang, struct type *type) |
89eef114 UW |
553 | { |
554 | type = check_typedef (type); | |
aa006118 | 555 | if (TYPE_IS_REFERENCE (type)) |
89eef114 UW |
556 | type = TYPE_TARGET_TYPE (type); |
557 | ||
78134374 | 558 | switch (type->code ()) |
89eef114 UW |
559 | { |
560 | case TYPE_CODE_PTR: | |
561 | case TYPE_CODE_FUNC: | |
562 | return 1; | |
563 | ||
564 | case TYPE_CODE_ARRAY: | |
67bd3fd5 | 565 | return type->is_vector () ? 0 : lang->c_style_arrays_p (); |
89eef114 UW |
566 | |
567 | default: | |
568 | return 0; | |
569 | } | |
570 | } | |
571 | ||
c83833f4 PA |
572 | /* Represents a fake method with the given parameter types. This is |
573 | used by the parser to construct a temporary "expected" type for | |
3693fdb3 PA |
574 | method overload resolution. FLAGS is used as instance flags of the |
575 | new type, in order to be able to make the new type represent a | |
576 | const/volatile overload. */ | |
072bba3b | 577 | |
c83833f4 | 578 | class fake_method |
072bba3b | 579 | { |
c83833f4 PA |
580 | public: |
581 | fake_method (type_instance_flags flags, | |
582 | int num_types, struct type **param_types); | |
583 | ~fake_method (); | |
584 | ||
585 | /* The constructed type. */ | |
586 | struct type *type () { return &m_type; } | |
587 | ||
588 | private: | |
589 | struct type m_type {}; | |
590 | main_type m_main_type {}; | |
591 | }; | |
592 | ||
593 | fake_method::fake_method (type_instance_flags flags, | |
594 | int num_types, struct type **param_types) | |
595 | { | |
596 | struct type *type = &m_type; | |
597 | ||
598 | TYPE_MAIN_TYPE (type) = &m_main_type; | |
072bba3b | 599 | TYPE_LENGTH (type) = 1; |
67607e24 | 600 | type->set_code (TYPE_CODE_METHOD); |
072bba3b | 601 | TYPE_CHAIN (type) = type; |
314ad88d | 602 | type->set_instance_flags (flags); |
e314d629 | 603 | if (num_types > 0) |
a6fb9c08 | 604 | { |
e314d629 TT |
605 | if (param_types[num_types - 1] == NULL) |
606 | { | |
607 | --num_types; | |
1d6286ed | 608 | type->set_has_varargs (true); |
e314d629 | 609 | } |
78134374 | 610 | else if (check_typedef (param_types[num_types - 1])->code () |
e314d629 TT |
611 | == TYPE_CODE_VOID) |
612 | { | |
613 | --num_types; | |
614 | /* Caller should have ensured this. */ | |
615 | gdb_assert (num_types == 0); | |
27e69b7a | 616 | type->set_is_prototyped (true); |
e314d629 | 617 | } |
a6fb9c08 | 618 | } |
e314d629 | 619 | |
2fabdf33 AB |
620 | /* We don't use TYPE_ZALLOC here to allocate space as TYPE is owned by |
621 | neither an objfile nor a gdbarch. As a result we must manually | |
622 | allocate memory for auxiliary fields, and free the memory ourselves | |
623 | when we are done with it. */ | |
5e33d5f4 | 624 | type->set_num_fields (num_types); |
3cabb6b0 SM |
625 | type->set_fields |
626 | ((struct field *) xzalloc (sizeof (struct field) * num_types)); | |
072bba3b KS |
627 | |
628 | while (num_types-- > 0) | |
5d14b6e5 | 629 | type->field (num_types).set_type (param_types[num_types]); |
c83833f4 | 630 | } |
072bba3b | 631 | |
c83833f4 PA |
632 | fake_method::~fake_method () |
633 | { | |
80fc5e77 | 634 | xfree (m_type.fields ()); |
072bba3b KS |
635 | } |
636 | ||
fe13dfec PA |
637 | /* Helper for evaluating an OP_VAR_VALUE. */ |
638 | ||
ced9779b | 639 | value * |
fe13dfec PA |
640 | evaluate_var_value (enum noside noside, const block *blk, symbol *var) |
641 | { | |
642 | /* JYG: We used to just return value_zero of the symbol type if | |
643 | we're asked to avoid side effects. Otherwise we return | |
644 | value_of_variable (...). However I'm not sure if | |
645 | value_of_variable () has any side effect. We need a full value | |
646 | object returned here for whatis_exp () to call evaluate_type () | |
647 | and then pass the full value to value_rtti_target_type () if we | |
648 | are dealing with a pointer or reference to a base class and print | |
649 | object is on. */ | |
650 | ||
651 | struct value *ret = NULL; | |
652 | ||
a70b8144 | 653 | try |
fe13dfec PA |
654 | { |
655 | ret = value_of_variable (var, blk); | |
656 | } | |
657 | ||
230d2906 | 658 | catch (const gdb_exception_error &except) |
fe13dfec PA |
659 | { |
660 | if (noside != EVAL_AVOID_SIDE_EFFECTS) | |
eedc3f4f | 661 | throw; |
fe13dfec PA |
662 | |
663 | ret = value_zero (SYMBOL_TYPE (var), not_lval); | |
664 | } | |
fe13dfec PA |
665 | |
666 | return ret; | |
667 | } | |
668 | ||
74ea4be4 PA |
669 | /* Helper for evaluating an OP_VAR_MSYM_VALUE. */ |
670 | ||
ced9779b | 671 | value * |
74ea4be4 PA |
672 | evaluate_var_msym_value (enum noside noside, |
673 | struct objfile *objfile, minimal_symbol *msymbol) | |
674 | { | |
8388016d PA |
675 | CORE_ADDR address; |
676 | type *the_type = find_minsym_type_and_address (msymbol, objfile, &address); | |
677 | ||
0becda7a | 678 | if (noside == EVAL_AVOID_SIDE_EFFECTS && !the_type->is_gnu_ifunc ()) |
8388016d | 679 | return value_zero (the_type, not_lval); |
74ea4be4 | 680 | else |
8388016d | 681 | return value_at_lazy (the_type, address); |
74ea4be4 PA |
682 | } |
683 | ||
827d0c51 PA |
684 | /* Helper for returning a value when handling EVAL_SKIP. */ |
685 | ||
ced9779b | 686 | value * |
827d0c51 PA |
687 | eval_skip_value (expression *exp) |
688 | { | |
689 | return value_from_longest (builtin_type (exp->gdbarch)->builtin_int, 1); | |
690 | } | |
691 | ||
6d816919 | 692 | /* See expression.h. */ |
e69570ee | 693 | |
6d816919 AB |
694 | value * |
695 | evaluate_subexp_do_call (expression *exp, enum noside noside, | |
1ab8280d TT |
696 | value *callee, |
697 | gdb::array_view<value *> argvec, | |
6d816919 AB |
698 | const char *function_name, |
699 | type *default_return_type) | |
e69570ee | 700 | { |
1ab8280d | 701 | if (callee == NULL) |
e69570ee PA |
702 | error (_("Cannot evaluate function -- may be inlined")); |
703 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
704 | { | |
705 | /* If the return type doesn't look like a function type, | |
706 | call an error. This can happen if somebody tries to turn | |
707 | a variable into a function call. */ | |
708 | ||
1ab8280d | 709 | type *ftype = value_type (callee); |
e69570ee | 710 | |
78134374 | 711 | if (ftype->code () == TYPE_CODE_INTERNAL_FUNCTION) |
e69570ee PA |
712 | { |
713 | /* We don't know anything about what the internal | |
714 | function might return, but we have to return | |
715 | something. */ | |
716 | return value_zero (builtin_type (exp->gdbarch)->builtin_int, | |
717 | not_lval); | |
718 | } | |
78134374 | 719 | else if (ftype->code () == TYPE_CODE_XMETHOD) |
e69570ee | 720 | { |
1ab8280d | 721 | type *return_type = result_type_of_xmethod (callee, argvec); |
e69570ee PA |
722 | |
723 | if (return_type == NULL) | |
724 | error (_("Xmethod is missing return type.")); | |
725 | return value_zero (return_type, not_lval); | |
726 | } | |
78134374 SM |
727 | else if (ftype->code () == TYPE_CODE_FUNC |
728 | || ftype->code () == TYPE_CODE_METHOD) | |
e69570ee | 729 | { |
0becda7a | 730 | if (ftype->is_gnu_ifunc ()) |
8388016d | 731 | { |
1ab8280d | 732 | CORE_ADDR address = value_address (callee); |
8388016d PA |
733 | type *resolved_type = find_gnu_ifunc_target_type (address); |
734 | ||
735 | if (resolved_type != NULL) | |
736 | ftype = resolved_type; | |
737 | } | |
738 | ||
e69570ee PA |
739 | type *return_type = TYPE_TARGET_TYPE (ftype); |
740 | ||
741 | if (return_type == NULL) | |
742 | return_type = default_return_type; | |
743 | ||
744 | if (return_type == NULL) | |
745 | error_call_unknown_return_type (function_name); | |
746 | ||
747 | return allocate_value (return_type); | |
748 | } | |
749 | else | |
750 | error (_("Expression of type other than " | |
751 | "\"Function returning ...\" used as function")); | |
752 | } | |
1ab8280d | 753 | switch (value_type (callee)->code ()) |
e69570ee PA |
754 | { |
755 | case TYPE_CODE_INTERNAL_FUNCTION: | |
756 | return call_internal_function (exp->gdbarch, exp->language_defn, | |
1ab8280d | 757 | callee, argvec.size (), argvec.data ()); |
e69570ee | 758 | case TYPE_CODE_XMETHOD: |
1ab8280d | 759 | return call_xmethod (callee, argvec); |
e69570ee | 760 | default: |
1ab8280d | 761 | return call_function_by_hand (callee, default_return_type, argvec); |
e69570ee PA |
762 | } |
763 | } | |
764 | ||
765 | /* Helper for evaluating an OP_FUNCALL. */ | |
766 | ||
767 | static value * | |
768 | evaluate_funcall (type *expect_type, expression *exp, int *pos, | |
769 | enum noside noside) | |
770 | { | |
771 | int tem; | |
772 | int pc2 = 0; | |
773 | value *arg1 = NULL; | |
774 | value *arg2 = NULL; | |
775 | int save_pos1; | |
776 | symbol *function = NULL; | |
777 | char *function_name = NULL; | |
778 | const char *var_func_name = NULL; | |
779 | ||
780 | int pc = (*pos); | |
781 | (*pos) += 2; | |
782 | ||
783 | exp_opcode op = exp->elts[*pos].opcode; | |
784 | int nargs = longest_to_int (exp->elts[pc].longconst); | |
785 | /* Allocate arg vector, including space for the function to be | |
786 | called in argvec[0], a potential `this', and a terminating | |
787 | NULL. */ | |
788 | value **argvec = (value **) alloca (sizeof (value *) * (nargs + 3)); | |
789 | if (op == STRUCTOP_MEMBER || op == STRUCTOP_MPTR) | |
790 | { | |
791 | /* First, evaluate the structure into arg2. */ | |
792 | pc2 = (*pos)++; | |
793 | ||
794 | if (op == STRUCTOP_MEMBER) | |
795 | { | |
796 | arg2 = evaluate_subexp_for_address (exp, pos, noside); | |
797 | } | |
798 | else | |
799 | { | |
fe1fe7ea | 800 | arg2 = evaluate_subexp (nullptr, exp, pos, noside); |
e69570ee PA |
801 | } |
802 | ||
803 | /* If the function is a virtual function, then the aggregate | |
804 | value (providing the structure) plays its part by providing | |
805 | the vtable. Otherwise, it is just along for the ride: call | |
806 | the function directly. */ | |
807 | ||
fe1fe7ea | 808 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
e69570ee PA |
809 | |
810 | type *a1_type = check_typedef (value_type (arg1)); | |
811 | if (noside == EVAL_SKIP) | |
812 | tem = 1; /* Set it to the right arg index so that all | |
813 | arguments can also be skipped. */ | |
78134374 | 814 | else if (a1_type->code () == TYPE_CODE_METHODPTR) |
e69570ee PA |
815 | { |
816 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
817 | arg1 = value_zero (TYPE_TARGET_TYPE (a1_type), not_lval); | |
818 | else | |
819 | arg1 = cplus_method_ptr_to_value (&arg2, arg1); | |
820 | ||
821 | /* Now, say which argument to start evaluating from. */ | |
822 | nargs++; | |
823 | tem = 2; | |
824 | argvec[1] = arg2; | |
825 | } | |
78134374 | 826 | else if (a1_type->code () == TYPE_CODE_MEMBERPTR) |
e69570ee PA |
827 | { |
828 | struct type *type_ptr | |
829 | = lookup_pointer_type (TYPE_SELF_TYPE (a1_type)); | |
830 | struct type *target_type_ptr | |
831 | = lookup_pointer_type (TYPE_TARGET_TYPE (a1_type)); | |
832 | ||
833 | /* Now, convert these values to an address. */ | |
834 | arg2 = value_cast (type_ptr, arg2); | |
835 | ||
836 | long mem_offset = value_as_long (arg1); | |
837 | ||
838 | arg1 = value_from_pointer (target_type_ptr, | |
839 | value_as_long (arg2) + mem_offset); | |
840 | arg1 = value_ind (arg1); | |
841 | tem = 1; | |
842 | } | |
843 | else | |
844 | error (_("Non-pointer-to-member value used in pointer-to-member " | |
845 | "construct")); | |
846 | } | |
847 | else if (op == STRUCTOP_STRUCT || op == STRUCTOP_PTR) | |
848 | { | |
849 | /* Hair for method invocations. */ | |
850 | int tem2; | |
851 | ||
852 | nargs++; | |
853 | /* First, evaluate the structure into arg2. */ | |
854 | pc2 = (*pos)++; | |
855 | tem2 = longest_to_int (exp->elts[pc2 + 1].longconst); | |
856 | *pos += 3 + BYTES_TO_EXP_ELEM (tem2 + 1); | |
857 | ||
858 | if (op == STRUCTOP_STRUCT) | |
859 | { | |
860 | /* If v is a variable in a register, and the user types | |
861 | v.method (), this will produce an error, because v has no | |
862 | address. | |
863 | ||
864 | A possible way around this would be to allocate a copy of | |
865 | the variable on the stack, copy in the contents, call the | |
866 | function, and copy out the contents. I.e. convert this | |
867 | from call by reference to call by copy-return (or | |
868 | whatever it's called). However, this does not work | |
869 | because it is not the same: the method being called could | |
870 | stash a copy of the address, and then future uses through | |
871 | that address (after the method returns) would be expected | |
872 | to use the variable itself, not some copy of it. */ | |
873 | arg2 = evaluate_subexp_for_address (exp, pos, noside); | |
874 | } | |
875 | else | |
876 | { | |
fe1fe7ea | 877 | arg2 = evaluate_subexp (nullptr, exp, pos, noside); |
e69570ee PA |
878 | |
879 | /* Check to see if the operator '->' has been overloaded. | |
880 | If the operator has been overloaded replace arg2 with the | |
881 | value returned by the custom operator and continue | |
882 | evaluation. */ | |
883 | while (unop_user_defined_p (op, arg2)) | |
884 | { | |
885 | struct value *value = NULL; | |
a70b8144 | 886 | try |
e69570ee PA |
887 | { |
888 | value = value_x_unop (arg2, op, noside); | |
889 | } | |
890 | ||
230d2906 | 891 | catch (const gdb_exception_error &except) |
e69570ee PA |
892 | { |
893 | if (except.error == NOT_FOUND_ERROR) | |
894 | break; | |
895 | else | |
eedc3f4f | 896 | throw; |
e69570ee | 897 | } |
e69570ee PA |
898 | |
899 | arg2 = value; | |
900 | } | |
901 | } | |
902 | /* Now, say which argument to start evaluating from. */ | |
903 | tem = 2; | |
904 | } | |
905 | else if (op == OP_SCOPE | |
906 | && overload_resolution | |
907 | && (exp->language_defn->la_language == language_cplus)) | |
908 | { | |
909 | /* Unpack it locally so we can properly handle overload | |
910 | resolution. */ | |
911 | char *name; | |
912 | int local_tem; | |
913 | ||
914 | pc2 = (*pos)++; | |
915 | local_tem = longest_to_int (exp->elts[pc2 + 2].longconst); | |
916 | (*pos) += 4 + BYTES_TO_EXP_ELEM (local_tem + 1); | |
917 | struct type *type = exp->elts[pc2 + 1].type; | |
918 | name = &exp->elts[pc2 + 3].string; | |
919 | ||
920 | function = NULL; | |
921 | function_name = NULL; | |
78134374 | 922 | if (type->code () == TYPE_CODE_NAMESPACE) |
e69570ee | 923 | { |
7d93a1e0 | 924 | function = cp_lookup_symbol_namespace (type->name (), |
e69570ee PA |
925 | name, |
926 | get_selected_block (0), | |
927 | VAR_DOMAIN).symbol; | |
928 | if (function == NULL) | |
929 | error (_("No symbol \"%s\" in namespace \"%s\"."), | |
7d93a1e0 | 930 | name, type->name ()); |
e69570ee PA |
931 | |
932 | tem = 1; | |
933 | /* arg2 is left as NULL on purpose. */ | |
934 | } | |
935 | else | |
936 | { | |
78134374 SM |
937 | gdb_assert (type->code () == TYPE_CODE_STRUCT |
938 | || type->code () == TYPE_CODE_UNION); | |
e69570ee PA |
939 | function_name = name; |
940 | ||
941 | /* We need a properly typed value for method lookup. For | |
942 | static methods arg2 is otherwise unused. */ | |
943 | arg2 = value_zero (type, lval_memory); | |
944 | ++nargs; | |
945 | tem = 2; | |
946 | } | |
947 | } | |
948 | else if (op == OP_ADL_FUNC) | |
949 | { | |
950 | /* Save the function position and move pos so that the arguments | |
951 | can be evaluated. */ | |
952 | int func_name_len; | |
953 | ||
954 | save_pos1 = *pos; | |
955 | tem = 1; | |
956 | ||
957 | func_name_len = longest_to_int (exp->elts[save_pos1 + 3].longconst); | |
958 | (*pos) += 6 + BYTES_TO_EXP_ELEM (func_name_len + 1); | |
959 | } | |
960 | else | |
961 | { | |
962 | /* Non-method function call. */ | |
963 | save_pos1 = *pos; | |
964 | tem = 1; | |
965 | ||
966 | /* If this is a C++ function wait until overload resolution. */ | |
967 | if (op == OP_VAR_VALUE | |
968 | && overload_resolution | |
969 | && (exp->language_defn->la_language == language_cplus)) | |
970 | { | |
971 | (*pos) += 4; /* Skip the evaluation of the symbol. */ | |
972 | argvec[0] = NULL; | |
973 | } | |
974 | else | |
975 | { | |
976 | if (op == OP_VAR_MSYM_VALUE) | |
977 | { | |
3e5ef9a4 | 978 | minimal_symbol *msym = exp->elts[*pos + 2].msymbol; |
c9d95fa3 | 979 | var_func_name = msym->print_name (); |
e69570ee PA |
980 | } |
981 | else if (op == OP_VAR_VALUE) | |
982 | { | |
3e5ef9a4 | 983 | symbol *sym = exp->elts[*pos + 2].symbol; |
987012b8 | 984 | var_func_name = sym->print_name (); |
e69570ee PA |
985 | } |
986 | ||
987 | argvec[0] = evaluate_subexp_with_coercion (exp, pos, noside); | |
988 | type *type = value_type (argvec[0]); | |
78134374 | 989 | if (type && type->code () == TYPE_CODE_PTR) |
e69570ee | 990 | type = TYPE_TARGET_TYPE (type); |
78134374 | 991 | if (type && type->code () == TYPE_CODE_FUNC) |
e69570ee | 992 | { |
1f704f76 | 993 | for (; tem <= nargs && tem <= type->num_fields (); tem++) |
e69570ee | 994 | { |
940da03e | 995 | argvec[tem] = evaluate_subexp (type->field (tem - 1).type (), |
e69570ee PA |
996 | exp, pos, noside); |
997 | } | |
998 | } | |
999 | } | |
1000 | } | |
1001 | ||
1002 | /* Evaluate arguments (if not already done, e.g., namespace::func() | |
1003 | and overload-resolution is off). */ | |
1004 | for (; tem <= nargs; tem++) | |
1005 | { | |
1006 | /* Ensure that array expressions are coerced into pointer | |
1007 | objects. */ | |
1008 | argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside); | |
1009 | } | |
1010 | ||
1011 | /* Signal end of arglist. */ | |
1012 | argvec[tem] = 0; | |
1013 | ||
1014 | if (noside == EVAL_SKIP) | |
1015 | return eval_skip_value (exp); | |
1016 | ||
1017 | if (op == OP_ADL_FUNC) | |
1018 | { | |
1019 | struct symbol *symp; | |
1020 | char *func_name; | |
1021 | int name_len; | |
1022 | int string_pc = save_pos1 + 3; | |
1023 | ||
1024 | /* Extract the function name. */ | |
1025 | name_len = longest_to_int (exp->elts[string_pc].longconst); | |
1026 | func_name = (char *) alloca (name_len + 1); | |
1027 | strcpy (func_name, &exp->elts[string_pc + 1].string); | |
1028 | ||
6b1747cd PA |
1029 | find_overload_match (gdb::make_array_view (&argvec[1], nargs), |
1030 | func_name, | |
e69570ee PA |
1031 | NON_METHOD, /* not method */ |
1032 | NULL, NULL, /* pass NULL symbol since | |
1033 | symbol is unknown */ | |
1034 | NULL, &symp, NULL, 0, noside); | |
1035 | ||
1036 | /* Now fix the expression being evaluated. */ | |
1037 | exp->elts[save_pos1 + 2].symbol = symp; | |
1038 | argvec[0] = evaluate_subexp_with_coercion (exp, &save_pos1, noside); | |
1039 | } | |
1040 | ||
1041 | if (op == STRUCTOP_STRUCT || op == STRUCTOP_PTR | |
1042 | || (op == OP_SCOPE && function_name != NULL)) | |
1043 | { | |
1044 | int static_memfuncp; | |
1045 | char *tstr; | |
1046 | ||
1047 | /* Method invocation: stuff "this" as first parameter. If the | |
1048 | method turns out to be static we undo this below. */ | |
1049 | argvec[1] = arg2; | |
1050 | ||
1051 | if (op != OP_SCOPE) | |
1052 | { | |
1053 | /* Name of method from expression. */ | |
1054 | tstr = &exp->elts[pc2 + 2].string; | |
1055 | } | |
1056 | else | |
1057 | tstr = function_name; | |
1058 | ||
1059 | if (overload_resolution && (exp->language_defn->la_language | |
1060 | == language_cplus)) | |
1061 | { | |
1062 | /* Language is C++, do some overload resolution before | |
1063 | evaluation. */ | |
1064 | struct value *valp = NULL; | |
1065 | ||
6b1747cd PA |
1066 | (void) find_overload_match (gdb::make_array_view (&argvec[1], nargs), |
1067 | tstr, | |
e69570ee PA |
1068 | METHOD, /* method */ |
1069 | &arg2, /* the object */ | |
1070 | NULL, &valp, NULL, | |
1071 | &static_memfuncp, 0, noside); | |
1072 | ||
1073 | if (op == OP_SCOPE && !static_memfuncp) | |
1074 | { | |
1075 | /* For the time being, we don't handle this. */ | |
1076 | error (_("Call to overloaded function %s requires " | |
1077 | "`this' pointer"), | |
1078 | function_name); | |
1079 | } | |
1080 | argvec[1] = arg2; /* the ``this'' pointer */ | |
1081 | argvec[0] = valp; /* Use the method found after overload | |
1082 | resolution. */ | |
1083 | } | |
1084 | else | |
1085 | /* Non-C++ case -- or no overload resolution. */ | |
1086 | { | |
1087 | struct value *temp = arg2; | |
1088 | ||
1089 | argvec[0] = value_struct_elt (&temp, argvec + 1, tstr, | |
1090 | &static_memfuncp, | |
1091 | op == STRUCTOP_STRUCT | |
1092 | ? "structure" : "structure pointer"); | |
1093 | /* value_struct_elt updates temp with the correct value of | |
1094 | the ``this'' pointer if necessary, so modify argvec[1] to | |
1095 | reflect any ``this'' changes. */ | |
1096 | arg2 | |
1097 | = value_from_longest (lookup_pointer_type(value_type (temp)), | |
1098 | value_address (temp) | |
1099 | + value_embedded_offset (temp)); | |
1100 | argvec[1] = arg2; /* the ``this'' pointer */ | |
1101 | } | |
1102 | ||
1103 | /* Take out `this' if needed. */ | |
1104 | if (static_memfuncp) | |
1105 | { | |
1106 | argvec[1] = argvec[0]; | |
1107 | nargs--; | |
1108 | argvec++; | |
1109 | } | |
1110 | } | |
1111 | else if (op == STRUCTOP_MEMBER || op == STRUCTOP_MPTR) | |
1112 | { | |
1113 | /* Pointer to member. argvec[1] is already set up. */ | |
1114 | argvec[0] = arg1; | |
1115 | } | |
1116 | else if (op == OP_VAR_VALUE || (op == OP_SCOPE && function != NULL)) | |
1117 | { | |
1118 | /* Non-member function being called. */ | |
1119 | /* fn: This can only be done for C++ functions. A C-style | |
1120 | function in a C++ program, for instance, does not have the | |
1121 | fields that are expected here. */ | |
1122 | ||
1123 | if (overload_resolution && (exp->language_defn->la_language | |
1124 | == language_cplus)) | |
1125 | { | |
1126 | /* Language is C++, do some overload resolution before | |
1127 | evaluation. */ | |
1128 | struct symbol *symp; | |
1129 | int no_adl = 0; | |
1130 | ||
1131 | /* If a scope has been specified disable ADL. */ | |
1132 | if (op == OP_SCOPE) | |
1133 | no_adl = 1; | |
1134 | ||
1135 | if (op == OP_VAR_VALUE) | |
1136 | function = exp->elts[save_pos1+2].symbol; | |
1137 | ||
6b1747cd | 1138 | (void) find_overload_match (gdb::make_array_view (&argvec[1], nargs), |
e69570ee PA |
1139 | NULL, /* no need for name */ |
1140 | NON_METHOD, /* not method */ | |
1141 | NULL, function, /* the function */ | |
1142 | NULL, &symp, NULL, no_adl, noside); | |
1143 | ||
1144 | if (op == OP_VAR_VALUE) | |
1145 | { | |
1146 | /* Now fix the expression being evaluated. */ | |
1147 | exp->elts[save_pos1+2].symbol = symp; | |
1148 | argvec[0] = evaluate_subexp_with_coercion (exp, &save_pos1, | |
1149 | noside); | |
1150 | } | |
1151 | else | |
1152 | argvec[0] = value_of_variable (symp, get_selected_block (0)); | |
1153 | } | |
1154 | else | |
1155 | { | |
1156 | /* Not C++, or no overload resolution allowed. */ | |
1157 | /* Nothing to be done; argvec already correctly set up. */ | |
1158 | } | |
1159 | } | |
1160 | else | |
1161 | { | |
1162 | /* It is probably a C-style function. */ | |
1163 | /* Nothing to be done; argvec already correctly set up. */ | |
1164 | } | |
1165 | ||
1ab8280d TT |
1166 | return evaluate_subexp_do_call (exp, noside, argvec[0], |
1167 | gdb::make_array_view (argvec + 1, nargs), | |
6d816919 | 1168 | var_func_name, expect_type); |
23be8da7 RB |
1169 | } |
1170 | ||
60e22c1e HD |
1171 | /* Return true if type is integral or reference to integral */ |
1172 | ||
1173 | static bool | |
1174 | is_integral_or_integral_reference (struct type *type) | |
1175 | { | |
1176 | if (is_integral_type (type)) | |
1177 | return true; | |
1178 | ||
1179 | type = check_typedef (type); | |
1180 | return (type != nullptr | |
1181 | && TYPE_IS_REFERENCE (type) | |
1182 | && is_integral_type (TYPE_TARGET_TYPE (type))); | |
1183 | } | |
1184 | ||
ea2d29f7 TT |
1185 | /* Helper function that implements the body of OP_SCOPE. */ |
1186 | ||
1187 | static struct value * | |
1188 | eval_op_scope (struct type *expect_type, struct expression *exp, | |
1189 | enum noside noside, | |
1190 | struct type *type, const char *string) | |
1191 | { | |
1192 | if (noside == EVAL_SKIP) | |
1193 | return eval_skip_value (exp); | |
1194 | struct value *arg1 = value_aggregate_elt (type, string, expect_type, | |
1195 | 0, noside); | |
1196 | if (arg1 == NULL) | |
1197 | error (_("There is no field named %s"), string); | |
1198 | return arg1; | |
1199 | } | |
1200 | ||
50b98adc TT |
1201 | /* Helper function that implements the body of OP_VAR_ENTRY_VALUE. */ |
1202 | ||
1203 | static struct value * | |
1204 | eval_op_var_entry_value (struct type *expect_type, struct expression *exp, | |
1205 | enum noside noside, symbol *sym) | |
1206 | { | |
1207 | if (noside == EVAL_SKIP) | |
1208 | return eval_skip_value (exp); | |
1209 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1210 | return value_zero (SYMBOL_TYPE (sym), not_lval); | |
1211 | ||
1212 | if (SYMBOL_COMPUTED_OPS (sym) == NULL | |
1213 | || SYMBOL_COMPUTED_OPS (sym)->read_variable_at_entry == NULL) | |
1214 | error (_("Symbol \"%s\" does not have any specific entry value"), | |
1215 | sym->print_name ()); | |
1216 | ||
1217 | struct frame_info *frame = get_selected_frame (NULL); | |
1218 | return SYMBOL_COMPUTED_OPS (sym)->read_variable_at_entry (sym, frame); | |
1219 | } | |
1220 | ||
c0df9289 TT |
1221 | /* Helper function that implements the body of OP_VAR_MSYM_VALUE. */ |
1222 | ||
1223 | static struct value * | |
1224 | eval_op_var_msym_value (struct type *expect_type, struct expression *exp, | |
1225 | enum noside noside, bool outermost_p, | |
1226 | minimal_symbol *msymbol, struct objfile *objfile) | |
1227 | { | |
1228 | value *val = evaluate_var_msym_value (noside, objfile, msymbol); | |
1229 | ||
1230 | struct type *type = value_type (val); | |
1231 | if (type->code () == TYPE_CODE_ERROR | |
1232 | && (noside != EVAL_AVOID_SIDE_EFFECTS || !outermost_p)) | |
1233 | error_unknown_type (msymbol->print_name ()); | |
1234 | return val; | |
1235 | } | |
1236 | ||
9b1d8af6 TT |
1237 | /* Helper function that implements the body of OP_FUNC_STATIC_VAR. */ |
1238 | ||
1239 | static struct value * | |
1240 | eval_op_func_static_var (struct type *expect_type, struct expression *exp, | |
1241 | enum noside noside, | |
1242 | value *func, const char *var) | |
1243 | { | |
1244 | if (noside == EVAL_SKIP) | |
1245 | return eval_skip_value (exp); | |
1246 | CORE_ADDR addr = value_address (func); | |
1247 | const block *blk = block_for_pc (addr); | |
1248 | struct block_symbol sym = lookup_symbol (var, blk, VAR_DOMAIN, NULL); | |
1249 | if (sym.symbol == NULL) | |
1250 | error (_("No symbol \"%s\" in specified context."), var); | |
1251 | return evaluate_var_value (noside, sym.block, sym.symbol); | |
1252 | } | |
1253 | ||
ffff730b TT |
1254 | /* Helper function that implements the body of OP_REGISTER. */ |
1255 | ||
1256 | static struct value * | |
1257 | eval_op_register (struct type *expect_type, struct expression *exp, | |
1258 | enum noside noside, const char *name) | |
1259 | { | |
1260 | int regno; | |
1261 | struct value *val; | |
1262 | ||
1263 | regno = user_reg_map_name_to_regnum (exp->gdbarch, | |
1264 | name, strlen (name)); | |
1265 | if (regno == -1) | |
1266 | error (_("Register $%s not available."), name); | |
1267 | ||
1268 | /* In EVAL_AVOID_SIDE_EFFECTS mode, we only need to return | |
1269 | a value with the appropriate register type. Unfortunately, | |
1270 | we don't have easy access to the type of user registers. | |
1271 | So for these registers, we fetch the register value regardless | |
1272 | of the evaluation mode. */ | |
1273 | if (noside == EVAL_AVOID_SIDE_EFFECTS | |
1274 | && regno < gdbarch_num_cooked_regs (exp->gdbarch)) | |
1275 | val = value_zero (register_type (exp->gdbarch, regno), not_lval); | |
1276 | else | |
1277 | val = value_of_register (regno, get_selected_frame (NULL)); | |
1278 | if (val == NULL) | |
1279 | error (_("Value of register %s not available."), name); | |
1280 | else | |
1281 | return val; | |
1282 | } | |
1283 | ||
14a1c64a TT |
1284 | /* Helper function that implements the body of OP_STRING. */ |
1285 | ||
1286 | static struct value * | |
1287 | eval_op_string (struct type *expect_type, struct expression *exp, | |
1288 | enum noside noside, int len, const char *string) | |
1289 | { | |
1290 | if (noside == EVAL_SKIP) | |
1291 | return eval_skip_value (exp); | |
1292 | struct type *type = language_string_char_type (exp->language_defn, | |
1293 | exp->gdbarch); | |
1294 | return value_string (string, len, type); | |
1295 | } | |
1296 | ||
f871bae1 TT |
1297 | /* Helper function that implements the body of OP_OBJC_SELECTOR. */ |
1298 | ||
1299 | static struct value * | |
1300 | eval_op_objc_selector (struct type *expect_type, struct expression *exp, | |
1301 | enum noside noside, | |
1302 | const char *sel) | |
1303 | { | |
1304 | if (noside == EVAL_SKIP) | |
1305 | return eval_skip_value (exp); | |
1306 | ||
1307 | struct type *selector_type = builtin_type (exp->gdbarch)->builtin_data_ptr; | |
1308 | return value_from_longest (selector_type, | |
1309 | lookup_child_selector (exp->gdbarch, sel)); | |
1310 | } | |
1311 | ||
5c2f201e TT |
1312 | /* Helper function that implements the body of BINOP_CONCAT. */ |
1313 | ||
1314 | static struct value * | |
1315 | eval_op_concat (struct type *expect_type, struct expression *exp, | |
1316 | enum noside noside, | |
1317 | enum exp_opcode op, struct value *arg1, struct value *arg2) | |
1318 | { | |
1319 | if (noside == EVAL_SKIP) | |
1320 | return eval_skip_value (exp); | |
1321 | if (binop_user_defined_p (op, arg1, arg2)) | |
1322 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); | |
1323 | else | |
1324 | return value_concat (arg1, arg2); | |
1325 | } | |
1326 | ||
f960a617 TT |
1327 | /* A helper function for TERNOP_SLICE. */ |
1328 | ||
1329 | static struct value * | |
1330 | eval_op_ternop (struct type *expect_type, struct expression *exp, | |
1331 | enum noside noside, | |
1332 | struct value *array, struct value *low, struct value *upper) | |
1333 | { | |
1334 | if (noside == EVAL_SKIP) | |
1335 | return eval_skip_value (exp); | |
1336 | int lowbound = value_as_long (low); | |
1337 | int upperbound = value_as_long (upper); | |
1338 | return value_slice (array, lowbound, upperbound - lowbound + 1); | |
1339 | } | |
1340 | ||
3e96c4fc TT |
1341 | /* A helper function for STRUCTOP_STRUCT. */ |
1342 | ||
1343 | static struct value * | |
1344 | eval_op_structop_struct (struct type *expect_type, struct expression *exp, | |
1345 | enum noside noside, | |
1346 | struct value *arg1, const char *string) | |
1347 | { | |
1348 | if (noside == EVAL_SKIP) | |
1349 | return eval_skip_value (exp); | |
1350 | struct value *arg3 = value_struct_elt (&arg1, NULL, string, | |
1351 | NULL, "structure"); | |
1352 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1353 | arg3 = value_zero (value_type (arg3), VALUE_LVAL (arg3)); | |
1354 | return arg3; | |
1355 | } | |
1356 | ||
fb461aa3 TT |
1357 | /* A helper function for STRUCTOP_PTR. */ |
1358 | ||
1359 | static struct value * | |
1360 | eval_op_structop_ptr (struct type *expect_type, struct expression *exp, | |
1361 | enum noside noside, enum exp_opcode op, | |
1362 | struct value *arg1, const char *string) | |
1363 | { | |
1364 | if (noside == EVAL_SKIP) | |
1365 | return eval_skip_value (exp); | |
1366 | ||
1367 | /* Check to see if operator '->' has been overloaded. If so replace | |
1368 | arg1 with the value returned by evaluating operator->(). */ | |
1369 | while (unop_user_defined_p (op, arg1)) | |
1370 | { | |
1371 | struct value *value = NULL; | |
1372 | try | |
1373 | { | |
1374 | value = value_x_unop (arg1, op, noside); | |
1375 | } | |
1376 | ||
1377 | catch (const gdb_exception_error &except) | |
1378 | { | |
1379 | if (except.error == NOT_FOUND_ERROR) | |
1380 | break; | |
1381 | else | |
1382 | throw; | |
1383 | } | |
1384 | ||
1385 | arg1 = value; | |
1386 | } | |
1387 | ||
1388 | /* JYG: if print object is on we need to replace the base type | |
1389 | with rtti type in order to continue on with successful | |
1390 | lookup of member / method only available in the rtti type. */ | |
1391 | { | |
1392 | struct type *arg_type = value_type (arg1); | |
1393 | struct type *real_type; | |
1394 | int full, using_enc; | |
1395 | LONGEST top; | |
1396 | struct value_print_options opts; | |
1397 | ||
1398 | get_user_print_options (&opts); | |
1399 | if (opts.objectprint && TYPE_TARGET_TYPE (arg_type) | |
1400 | && (TYPE_TARGET_TYPE (arg_type)->code () == TYPE_CODE_STRUCT)) | |
1401 | { | |
1402 | real_type = value_rtti_indirect_type (arg1, &full, &top, | |
1403 | &using_enc); | |
1404 | if (real_type) | |
1405 | arg1 = value_cast (real_type, arg1); | |
1406 | } | |
1407 | } | |
1408 | ||
1409 | struct value *arg3 = value_struct_elt (&arg1, NULL, string, | |
1410 | NULL, "structure pointer"); | |
1411 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1412 | arg3 = value_zero (value_type (arg3), VALUE_LVAL (arg3)); | |
1413 | return arg3; | |
1414 | } | |
1415 | ||
b7a96ed2 TT |
1416 | /* A helper function for STRUCTOP_MEMBER. */ |
1417 | ||
1418 | static struct value * | |
1419 | eval_op_member (struct type *expect_type, struct expression *exp, | |
1420 | enum noside noside, | |
1421 | struct value *arg1, struct value *arg2) | |
1422 | { | |
1423 | long mem_offset; | |
1424 | ||
1425 | if (noside == EVAL_SKIP) | |
1426 | return eval_skip_value (exp); | |
1427 | ||
1428 | struct value *arg3; | |
1429 | struct type *type = check_typedef (value_type (arg2)); | |
1430 | switch (type->code ()) | |
1431 | { | |
1432 | case TYPE_CODE_METHODPTR: | |
1433 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1434 | return value_zero (TYPE_TARGET_TYPE (type), not_lval); | |
1435 | else | |
1436 | { | |
1437 | arg2 = cplus_method_ptr_to_value (&arg1, arg2); | |
1438 | gdb_assert (value_type (arg2)->code () == TYPE_CODE_PTR); | |
1439 | return value_ind (arg2); | |
1440 | } | |
1441 | ||
1442 | case TYPE_CODE_MEMBERPTR: | |
1443 | /* Now, convert these values to an address. */ | |
1444 | arg1 = value_cast_pointers (lookup_pointer_type (TYPE_SELF_TYPE (type)), | |
1445 | arg1, 1); | |
1446 | ||
1447 | mem_offset = value_as_long (arg2); | |
1448 | ||
1449 | arg3 = value_from_pointer (lookup_pointer_type (TYPE_TARGET_TYPE (type)), | |
1450 | value_as_long (arg1) + mem_offset); | |
1451 | return value_ind (arg3); | |
1452 | ||
1453 | default: | |
1454 | error (_("non-pointer-to-member value used " | |
1455 | "in pointer-to-member construct")); | |
1456 | } | |
1457 | } | |
1458 | ||
aedaf9ac TT |
1459 | /* A helper function for BINOP_ADD. */ |
1460 | ||
1461 | static struct value * | |
1462 | eval_op_add (struct type *expect_type, struct expression *exp, | |
1463 | enum noside noside, enum exp_opcode op, | |
1464 | struct value *arg1, struct value *arg2) | |
1465 | { | |
1466 | if (noside == EVAL_SKIP) | |
1467 | return eval_skip_value (exp); | |
1468 | if (binop_user_defined_p (op, arg1, arg2)) | |
1469 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); | |
1470 | else if (ptrmath_type_p (exp->language_defn, value_type (arg1)) | |
1471 | && is_integral_or_integral_reference (value_type (arg2))) | |
1472 | return value_ptradd (arg1, value_as_long (arg2)); | |
1473 | else if (ptrmath_type_p (exp->language_defn, value_type (arg2)) | |
1474 | && is_integral_or_integral_reference (value_type (arg1))) | |
1475 | return value_ptradd (arg2, value_as_long (arg1)); | |
1476 | else | |
1477 | { | |
1478 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
1479 | return value_binop (arg1, arg2, BINOP_ADD); | |
1480 | } | |
1481 | } | |
1482 | ||
d9790e22 TT |
1483 | /* A helper function for BINOP_SUB. */ |
1484 | ||
1485 | static struct value * | |
1486 | eval_op_sub (struct type *expect_type, struct expression *exp, | |
1487 | enum noside noside, enum exp_opcode op, | |
1488 | struct value *arg1, struct value *arg2) | |
1489 | { | |
1490 | if (noside == EVAL_SKIP) | |
1491 | return eval_skip_value (exp); | |
1492 | if (binop_user_defined_p (op, arg1, arg2)) | |
1493 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); | |
1494 | else if (ptrmath_type_p (exp->language_defn, value_type (arg1)) | |
1495 | && ptrmath_type_p (exp->language_defn, value_type (arg2))) | |
1496 | { | |
1497 | /* FIXME -- should be ptrdiff_t */ | |
1498 | struct type *type = builtin_type (exp->gdbarch)->builtin_long; | |
1499 | return value_from_longest (type, value_ptrdiff (arg1, arg2)); | |
1500 | } | |
1501 | else if (ptrmath_type_p (exp->language_defn, value_type (arg1)) | |
1502 | && is_integral_or_integral_reference (value_type (arg2))) | |
1503 | return value_ptradd (arg1, - value_as_long (arg2)); | |
1504 | else | |
1505 | { | |
1506 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
1507 | return value_binop (arg1, arg2, BINOP_SUB); | |
1508 | } | |
1509 | } | |
1510 | ||
7cdcdd02 TT |
1511 | /* Helper function for several different binary operations. */ |
1512 | ||
1513 | static struct value * | |
1514 | eval_op_binary (struct type *expect_type, struct expression *exp, | |
1515 | enum noside noside, enum exp_opcode op, | |
1516 | struct value *arg1, struct value *arg2) | |
1517 | { | |
1518 | if (noside == EVAL_SKIP) | |
1519 | return eval_skip_value (exp); | |
1520 | if (binop_user_defined_p (op, arg1, arg2)) | |
1521 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); | |
1522 | else | |
1523 | { | |
1524 | /* If EVAL_AVOID_SIDE_EFFECTS and we're dividing by zero, | |
1525 | fudge arg2 to avoid division-by-zero, the caller is | |
1526 | (theoretically) only looking for the type of the result. */ | |
1527 | if (noside == EVAL_AVOID_SIDE_EFFECTS | |
1528 | /* ??? Do we really want to test for BINOP_MOD here? | |
1529 | The implementation of value_binop gives it a well-defined | |
1530 | value. */ | |
1531 | && (op == BINOP_DIV | |
1532 | || op == BINOP_INTDIV | |
1533 | || op == BINOP_REM | |
1534 | || op == BINOP_MOD) | |
1535 | && value_logical_not (arg2)) | |
1536 | { | |
1537 | struct value *v_one; | |
1538 | ||
1539 | v_one = value_one (value_type (arg2)); | |
1540 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &v_one); | |
1541 | return value_binop (arg1, v_one, op); | |
1542 | } | |
1543 | else | |
1544 | { | |
1545 | /* For shift and integer exponentiation operations, | |
1546 | only promote the first argument. */ | |
1547 | if ((op == BINOP_LSH || op == BINOP_RSH || op == BINOP_EXP) | |
1548 | && is_integral_type (value_type (arg2))) | |
1549 | unop_promote (exp->language_defn, exp->gdbarch, &arg1); | |
1550 | else | |
1551 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
1552 | ||
1553 | return value_binop (arg1, arg2, op); | |
1554 | } | |
1555 | } | |
1556 | } | |
1557 | ||
288d26bc TT |
1558 | /* A helper function for BINOP_SUBSCRIPT. */ |
1559 | ||
1560 | static struct value * | |
1561 | eval_op_subscript (struct type *expect_type, struct expression *exp, | |
1562 | enum noside noside, enum exp_opcode op, | |
1563 | struct value *arg1, struct value *arg2) | |
1564 | { | |
1565 | if (noside == EVAL_SKIP) | |
1566 | return eval_skip_value (exp); | |
1567 | if (binop_user_defined_p (op, arg1, arg2)) | |
1568 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); | |
1569 | else | |
1570 | { | |
1571 | /* If the user attempts to subscript something that is not an | |
1572 | array or pointer type (like a plain int variable for example), | |
1573 | then report this as an error. */ | |
1574 | ||
1575 | arg1 = coerce_ref (arg1); | |
1576 | struct type *type = check_typedef (value_type (arg1)); | |
1577 | if (type->code () != TYPE_CODE_ARRAY | |
1578 | && type->code () != TYPE_CODE_PTR) | |
1579 | { | |
1580 | if (type->name ()) | |
1581 | error (_("cannot subscript something of type `%s'"), | |
1582 | type->name ()); | |
1583 | else | |
1584 | error (_("cannot subscript requested type")); | |
1585 | } | |
1586 | ||
1587 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1588 | return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1)); | |
1589 | else | |
1590 | return value_subscript (arg1, value_as_long (arg2)); | |
1591 | } | |
1592 | } | |
1593 | ||
0cc96de8 TT |
1594 | /* A helper function for BINOP_EQUAL. */ |
1595 | ||
1596 | static struct value * | |
1597 | eval_op_equal (struct type *expect_type, struct expression *exp, | |
1598 | enum noside noside, enum exp_opcode op, | |
1599 | struct value *arg1, struct value *arg2) | |
1600 | { | |
1601 | if (noside == EVAL_SKIP) | |
1602 | return eval_skip_value (exp); | |
1603 | if (binop_user_defined_p (op, arg1, arg2)) | |
1604 | { | |
1605 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); | |
1606 | } | |
1607 | else | |
1608 | { | |
1609 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
1610 | int tem = value_equal (arg1, arg2); | |
1611 | struct type *type = language_bool_type (exp->language_defn, | |
1612 | exp->gdbarch); | |
1613 | return value_from_longest (type, (LONGEST) tem); | |
1614 | } | |
1615 | } | |
1616 | ||
1fcb3559 TT |
1617 | /* A helper function for BINOP_NOTEQUAL. */ |
1618 | ||
1619 | static struct value * | |
1620 | eval_op_notequal (struct type *expect_type, struct expression *exp, | |
1621 | enum noside noside, enum exp_opcode op, | |
1622 | struct value *arg1, struct value *arg2) | |
1623 | { | |
1624 | if (noside == EVAL_SKIP) | |
1625 | return eval_skip_value (exp); | |
1626 | if (binop_user_defined_p (op, arg1, arg2)) | |
1627 | { | |
1628 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); | |
1629 | } | |
1630 | else | |
1631 | { | |
1632 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
1633 | int tem = value_equal (arg1, arg2); | |
1634 | struct type *type = language_bool_type (exp->language_defn, | |
1635 | exp->gdbarch); | |
1636 | return value_from_longest (type, (LONGEST) ! tem); | |
1637 | } | |
1638 | } | |
1639 | ||
6cad1349 TT |
1640 | /* A helper function for BINOP_LESS. */ |
1641 | ||
1642 | static struct value * | |
1643 | eval_op_less (struct type *expect_type, struct expression *exp, | |
1644 | enum noside noside, enum exp_opcode op, | |
1645 | struct value *arg1, struct value *arg2) | |
1646 | { | |
1647 | if (noside == EVAL_SKIP) | |
1648 | return eval_skip_value (exp); | |
1649 | if (binop_user_defined_p (op, arg1, arg2)) | |
1650 | { | |
1651 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); | |
1652 | } | |
1653 | else | |
1654 | { | |
1655 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
1656 | int tem = value_less (arg1, arg2); | |
1657 | struct type *type = language_bool_type (exp->language_defn, | |
1658 | exp->gdbarch); | |
1659 | return value_from_longest (type, (LONGEST) tem); | |
1660 | } | |
1661 | } | |
1662 | ||
1f78d732 TT |
1663 | /* A helper function for BINOP_GTR. */ |
1664 | ||
1665 | static struct value * | |
1666 | eval_op_gtr (struct type *expect_type, struct expression *exp, | |
1667 | enum noside noside, enum exp_opcode op, | |
1668 | struct value *arg1, struct value *arg2) | |
1669 | { | |
1670 | if (noside == EVAL_SKIP) | |
1671 | return eval_skip_value (exp); | |
1672 | if (binop_user_defined_p (op, arg1, arg2)) | |
1673 | { | |
1674 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); | |
1675 | } | |
1676 | else | |
1677 | { | |
1678 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
1679 | int tem = value_less (arg2, arg1); | |
1680 | struct type *type = language_bool_type (exp->language_defn, | |
1681 | exp->gdbarch); | |
1682 | return value_from_longest (type, (LONGEST) tem); | |
1683 | } | |
1684 | } | |
1685 | ||
96e3efd9 TT |
1686 | /* A helper function for BINOP_GEQ. */ |
1687 | ||
1688 | static struct value * | |
1689 | eval_op_geq (struct type *expect_type, struct expression *exp, | |
1690 | enum noside noside, enum exp_opcode op, | |
1691 | struct value *arg1, struct value *arg2) | |
1692 | { | |
1693 | if (noside == EVAL_SKIP) | |
1694 | return eval_skip_value (exp); | |
1695 | if (binop_user_defined_p (op, arg1, arg2)) | |
1696 | { | |
1697 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); | |
1698 | } | |
1699 | else | |
1700 | { | |
1701 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
1702 | int tem = value_less (arg2, arg1) || value_equal (arg1, arg2); | |
1703 | struct type *type = language_bool_type (exp->language_defn, | |
1704 | exp->gdbarch); | |
1705 | return value_from_longest (type, (LONGEST) tem); | |
1706 | } | |
1707 | } | |
1708 | ||
60cdd487 TT |
1709 | /* A helper function for BINOP_LEQ. */ |
1710 | ||
1711 | static struct value * | |
1712 | eval_op_leq (struct type *expect_type, struct expression *exp, | |
1713 | enum noside noside, enum exp_opcode op, | |
1714 | struct value *arg1, struct value *arg2) | |
1715 | { | |
1716 | if (noside == EVAL_SKIP) | |
1717 | return eval_skip_value (exp); | |
1718 | if (binop_user_defined_p (op, arg1, arg2)) | |
1719 | { | |
1720 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); | |
1721 | } | |
1722 | else | |
1723 | { | |
1724 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
1725 | int tem = value_less (arg1, arg2) || value_equal (arg1, arg2); | |
1726 | struct type *type = language_bool_type (exp->language_defn, | |
1727 | exp->gdbarch); | |
1728 | return value_from_longest (type, (LONGEST) tem); | |
1729 | } | |
1730 | } | |
1731 | ||
61051030 | 1732 | struct value * |
fba45db2 | 1733 | evaluate_subexp_standard (struct type *expect_type, |
aa1ee363 | 1734 | struct expression *exp, int *pos, |
fba45db2 | 1735 | enum noside noside) |
c906108c SS |
1736 | { |
1737 | enum exp_opcode op; | |
1738 | int tem, tem2, tem3; | |
e69570ee | 1739 | int pc, oldpos; |
61051030 AC |
1740 | struct value *arg1 = NULL; |
1741 | struct value *arg2 = NULL; | |
1742 | struct value *arg3; | |
c906108c SS |
1743 | struct type *type; |
1744 | int nargs; | |
61051030 | 1745 | struct value **argvec; |
c906108c | 1746 | int ix; |
c5aa993b | 1747 | struct type **arg_types; |
c906108c | 1748 | |
c906108c SS |
1749 | pc = (*pos)++; |
1750 | op = exp->elts[pc].opcode; | |
1751 | ||
1752 | switch (op) | |
1753 | { | |
1754 | case OP_SCOPE: | |
1755 | tem = longest_to_int (exp->elts[pc + 2].longconst); | |
1756 | (*pos) += 4 + BYTES_TO_EXP_ELEM (tem + 1); | |
ea2d29f7 TT |
1757 | return eval_op_scope (expect_type, exp, noside, |
1758 | exp->elts[pc + 1].type, | |
1759 | &exp->elts[pc + 3].string); | |
c906108c SS |
1760 | |
1761 | case OP_LONG: | |
1762 | (*pos) += 3; | |
1763 | return value_from_longest (exp->elts[pc + 1].type, | |
1764 | exp->elts[pc + 2].longconst); | |
1765 | ||
edd079d9 | 1766 | case OP_FLOAT: |
c906108c | 1767 | (*pos) += 3; |
edd079d9 UW |
1768 | return value_from_contents (exp->elts[pc + 1].type, |
1769 | exp->elts[pc + 2].floatconst); | |
27bc4d80 | 1770 | |
7322dca9 | 1771 | case OP_ADL_FUNC: |
c906108c | 1772 | case OP_VAR_VALUE: |
46a4882b | 1773 | { |
23be8da7 | 1774 | (*pos) += 3; |
46a4882b | 1775 | symbol *var = exp->elts[pc + 2].symbol; |
78134374 | 1776 | if (SYMBOL_TYPE (var)->code () == TYPE_CODE_ERROR) |
987012b8 | 1777 | error_unknown_type (var->print_name ()); |
23be8da7 RB |
1778 | if (noside != EVAL_SKIP) |
1779 | return evaluate_var_value (noside, exp->elts[pc + 1].block, var); | |
1780 | else | |
1781 | { | |
1782 | /* Return a dummy value of the correct type when skipping, so | |
1783 | that parent functions know what is to be skipped. */ | |
1784 | return allocate_value (SYMBOL_TYPE (var)); | |
1785 | } | |
46a4882b PA |
1786 | } |
1787 | ||
74ea4be4 | 1788 | case OP_VAR_MSYM_VALUE: |
46a4882b PA |
1789 | { |
1790 | (*pos) += 3; | |
1791 | ||
1792 | minimal_symbol *msymbol = exp->elts[pc + 2].msymbol; | |
c0df9289 TT |
1793 | return eval_op_var_msym_value (expect_type, exp, noside, |
1794 | pc == 0, msymbol, | |
1795 | exp->elts[pc + 1].objfile); | |
46a4882b | 1796 | } |
c906108c | 1797 | |
36b11add JK |
1798 | case OP_VAR_ENTRY_VALUE: |
1799 | (*pos) += 2; | |
36b11add JK |
1800 | |
1801 | { | |
1802 | struct symbol *sym = exp->elts[pc + 1].symbol; | |
36b11add | 1803 | |
50b98adc | 1804 | return eval_op_var_entry_value (expect_type, exp, noside, sym); |
36b11add JK |
1805 | } |
1806 | ||
858be34c PA |
1807 | case OP_FUNC_STATIC_VAR: |
1808 | tem = longest_to_int (exp->elts[pc + 1].longconst); | |
1809 | (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1); | |
1810 | if (noside == EVAL_SKIP) | |
1811 | return eval_skip_value (exp); | |
1812 | ||
1813 | { | |
1814 | value *func = evaluate_subexp_standard (NULL, exp, pos, noside); | |
858be34c | 1815 | |
9b1d8af6 TT |
1816 | return eval_op_func_static_var (expect_type, exp, noside, func, |
1817 | &exp->elts[pc + 2].string); | |
858be34c PA |
1818 | } |
1819 | ||
c906108c SS |
1820 | case OP_LAST: |
1821 | (*pos) += 2; | |
1822 | return | |
1823 | access_value_history (longest_to_int (exp->elts[pc + 1].longconst)); | |
1824 | ||
1825 | case OP_REGISTER: | |
1826 | { | |
67f3407f | 1827 | const char *name = &exp->elts[pc + 2].string; |
67f3407f DJ |
1828 | |
1829 | (*pos) += 3 + BYTES_TO_EXP_ELEM (exp->elts[pc + 1].longconst + 1); | |
ffff730b | 1830 | return eval_op_register (expect_type, exp, noside, name); |
c906108c SS |
1831 | } |
1832 | case OP_BOOL: | |
1833 | (*pos) += 2; | |
fbb06eb1 UW |
1834 | type = language_bool_type (exp->language_defn, exp->gdbarch); |
1835 | return value_from_longest (type, exp->elts[pc + 1].longconst); | |
c906108c SS |
1836 | |
1837 | case OP_INTERNALVAR: | |
1838 | (*pos) += 2; | |
78267919 UW |
1839 | return value_of_internalvar (exp->gdbarch, |
1840 | exp->elts[pc + 1].internalvar); | |
c906108c SS |
1841 | |
1842 | case OP_STRING: | |
1843 | tem = longest_to_int (exp->elts[pc + 1].longconst); | |
1844 | (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1); | |
14a1c64a TT |
1845 | return eval_op_string (expect_type, exp, noside, tem, |
1846 | &exp->elts[pc + 2].string); | |
c906108c | 1847 | |
3e43a32a MS |
1848 | case OP_OBJC_NSSTRING: /* Objective C Foundation Class |
1849 | NSString constant. */ | |
a9fa03de AF |
1850 | tem = longest_to_int (exp->elts[pc + 1].longconst); |
1851 | (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1); | |
1852 | if (noside == EVAL_SKIP) | |
827d0c51 | 1853 | return eval_skip_value (exp); |
3b7538c0 | 1854 | return value_nsstring (exp->gdbarch, &exp->elts[pc + 2].string, tem + 1); |
a9fa03de | 1855 | |
c906108c SS |
1856 | case OP_ARRAY: |
1857 | (*pos) += 3; | |
1858 | tem2 = longest_to_int (exp->elts[pc + 1].longconst); | |
1859 | tem3 = longest_to_int (exp->elts[pc + 2].longconst); | |
1860 | nargs = tem3 - tem2 + 1; | |
fe1fe7ea | 1861 | type = expect_type ? check_typedef (expect_type) : nullptr; |
c906108c | 1862 | |
fe1fe7ea | 1863 | if (expect_type != nullptr && noside != EVAL_SKIP |
78134374 | 1864 | && type->code () == TYPE_CODE_STRUCT) |
c906108c | 1865 | { |
61051030 | 1866 | struct value *rec = allocate_value (expect_type); |
d7f9d729 | 1867 | |
990a07ab | 1868 | memset (value_contents_raw (rec), '\0', TYPE_LENGTH (type)); |
c906108c SS |
1869 | return evaluate_struct_tuple (rec, exp, pos, noside, nargs); |
1870 | } | |
1871 | ||
fe1fe7ea | 1872 | if (expect_type != nullptr && noside != EVAL_SKIP |
78134374 | 1873 | && type->code () == TYPE_CODE_ARRAY) |
c906108c | 1874 | { |
3d967001 | 1875 | struct type *range_type = type->index_type (); |
c906108c | 1876 | struct type *element_type = TYPE_TARGET_TYPE (type); |
61051030 | 1877 | struct value *array = allocate_value (expect_type); |
c906108c SS |
1878 | int element_size = TYPE_LENGTH (check_typedef (element_type)); |
1879 | LONGEST low_bound, high_bound, index; | |
d7f9d729 | 1880 | |
1f8d2881 | 1881 | if (!get_discrete_bounds (range_type, &low_bound, &high_bound)) |
c906108c SS |
1882 | { |
1883 | low_bound = 0; | |
1884 | high_bound = (TYPE_LENGTH (type) / element_size) - 1; | |
1885 | } | |
1886 | index = low_bound; | |
990a07ab | 1887 | memset (value_contents_raw (array), 0, TYPE_LENGTH (expect_type)); |
c5aa993b | 1888 | for (tem = nargs; --nargs >= 0;) |
c906108c | 1889 | { |
61051030 | 1890 | struct value *element; |
d7f9d729 | 1891 | |
c906108c | 1892 | element = evaluate_subexp (element_type, exp, pos, noside); |
df407dfe | 1893 | if (value_type (element) != element_type) |
c906108c | 1894 | element = value_cast (element_type, element); |
1cd49c43 TT |
1895 | if (index > high_bound) |
1896 | /* To avoid memory corruption. */ | |
1897 | error (_("Too many array elements")); | |
1898 | memcpy (value_contents_raw (array) | |
1899 | + (index - low_bound) * element_size, | |
1900 | value_contents (element), | |
1901 | element_size); | |
c906108c SS |
1902 | index++; |
1903 | } | |
1904 | return array; | |
1905 | } | |
1906 | ||
fe1fe7ea | 1907 | if (expect_type != nullptr && noside != EVAL_SKIP |
78134374 | 1908 | && type->code () == TYPE_CODE_SET) |
c906108c | 1909 | { |
61051030 | 1910 | struct value *set = allocate_value (expect_type); |
47b667de | 1911 | gdb_byte *valaddr = value_contents_raw (set); |
3d967001 | 1912 | struct type *element_type = type->index_type (); |
c906108c SS |
1913 | struct type *check_type = element_type; |
1914 | LONGEST low_bound, high_bound; | |
1915 | ||
0963b4bd | 1916 | /* Get targettype of elementtype. */ |
78134374 SM |
1917 | while (check_type->code () == TYPE_CODE_RANGE |
1918 | || check_type->code () == TYPE_CODE_TYPEDEF) | |
c906108c SS |
1919 | check_type = TYPE_TARGET_TYPE (check_type); |
1920 | ||
1f8d2881 | 1921 | if (!get_discrete_bounds (element_type, &low_bound, &high_bound)) |
8a3fe4f8 | 1922 | error (_("(power)set type with unknown size")); |
c906108c SS |
1923 | memset (valaddr, '\0', TYPE_LENGTH (type)); |
1924 | for (tem = 0; tem < nargs; tem++) | |
1925 | { | |
1926 | LONGEST range_low, range_high; | |
1927 | struct type *range_low_type, *range_high_type; | |
61051030 | 1928 | struct value *elem_val; |
d7f9d729 | 1929 | |
ae8fddda YQ |
1930 | elem_val = evaluate_subexp (element_type, exp, pos, noside); |
1931 | range_low_type = range_high_type = value_type (elem_val); | |
1932 | range_low = range_high = value_as_long (elem_val); | |
1933 | ||
0963b4bd | 1934 | /* Check types of elements to avoid mixture of elements from |
dda83cd7 SM |
1935 | different types. Also check if type of element is "compatible" |
1936 | with element type of powerset. */ | |
78134374 | 1937 | if (range_low_type->code () == TYPE_CODE_RANGE) |
c906108c | 1938 | range_low_type = TYPE_TARGET_TYPE (range_low_type); |
78134374 | 1939 | if (range_high_type->code () == TYPE_CODE_RANGE) |
c906108c | 1940 | range_high_type = TYPE_TARGET_TYPE (range_high_type); |
78134374 SM |
1941 | if ((range_low_type->code () != range_high_type->code ()) |
1942 | || (range_low_type->code () == TYPE_CODE_ENUM | |
905e0470 | 1943 | && (range_low_type != range_high_type))) |
0963b4bd | 1944 | /* different element modes. */ |
8a3fe4f8 | 1945 | error (_("POWERSET tuple elements of different mode")); |
78134374 SM |
1946 | if ((check_type->code () != range_low_type->code ()) |
1947 | || (check_type->code () == TYPE_CODE_ENUM | |
905e0470 | 1948 | && range_low_type != check_type)) |
8a3fe4f8 | 1949 | error (_("incompatible POWERSET tuple elements")); |
c906108c SS |
1950 | if (range_low > range_high) |
1951 | { | |
8a3fe4f8 | 1952 | warning (_("empty POWERSET tuple range")); |
c906108c SS |
1953 | continue; |
1954 | } | |
1955 | if (range_low < low_bound || range_high > high_bound) | |
8a3fe4f8 | 1956 | error (_("POWERSET tuple element out of range")); |
c906108c SS |
1957 | range_low -= low_bound; |
1958 | range_high -= low_bound; | |
c5aa993b | 1959 | for (; range_low <= range_high; range_low++) |
c906108c SS |
1960 | { |
1961 | int bit_index = (unsigned) range_low % TARGET_CHAR_BIT; | |
d7f9d729 | 1962 | |
d5a22e77 | 1963 | if (gdbarch_byte_order (exp->gdbarch) == BFD_ENDIAN_BIG) |
c906108c | 1964 | bit_index = TARGET_CHAR_BIT - 1 - bit_index; |
c5aa993b | 1965 | valaddr[(unsigned) range_low / TARGET_CHAR_BIT] |
c906108c SS |
1966 | |= 1 << bit_index; |
1967 | } | |
1968 | } | |
1969 | return set; | |
1970 | } | |
1971 | ||
8d749320 | 1972 | argvec = XALLOCAVEC (struct value *, nargs); |
c906108c SS |
1973 | for (tem = 0; tem < nargs; tem++) |
1974 | { | |
0963b4bd MS |
1975 | /* Ensure that array expressions are coerced into pointer |
1976 | objects. */ | |
c906108c SS |
1977 | argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside); |
1978 | } | |
1979 | if (noside == EVAL_SKIP) | |
827d0c51 | 1980 | return eval_skip_value (exp); |
c906108c SS |
1981 | return value_array (tem2, tem3, argvec); |
1982 | ||
1983 | case TERNOP_SLICE: | |
1984 | { | |
fe1fe7ea | 1985 | struct value *array = evaluate_subexp (nullptr, exp, pos, noside); |
f960a617 TT |
1986 | struct value *low = evaluate_subexp (nullptr, exp, pos, noside); |
1987 | struct value *upper = evaluate_subexp (nullptr, exp, pos, noside); | |
1988 | return eval_op_ternop (expect_type, exp, noside, array, low, upper); | |
c906108c SS |
1989 | } |
1990 | ||
c906108c SS |
1991 | case TERNOP_COND: |
1992 | /* Skip third and second args to evaluate the first one. */ | |
fe1fe7ea | 1993 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
c906108c SS |
1994 | if (value_logical_not (arg1)) |
1995 | { | |
fe1fe7ea SM |
1996 | evaluate_subexp (nullptr, exp, pos, EVAL_SKIP); |
1997 | return evaluate_subexp (nullptr, exp, pos, noside); | |
c906108c SS |
1998 | } |
1999 | else | |
2000 | { | |
fe1fe7ea SM |
2001 | arg2 = evaluate_subexp (nullptr, exp, pos, noside); |
2002 | evaluate_subexp (nullptr, exp, pos, EVAL_SKIP); | |
c906108c SS |
2003 | return arg2; |
2004 | } | |
2005 | ||
a9fa03de AF |
2006 | case OP_OBJC_SELECTOR: |
2007 | { /* Objective C @selector operator. */ | |
2008 | char *sel = &exp->elts[pc + 2].string; | |
2009 | int len = longest_to_int (exp->elts[pc + 1].longconst); | |
2010 | ||
2011 | (*pos) += 3 + BYTES_TO_EXP_ELEM (len + 1); | |
a9fa03de AF |
2012 | if (sel[len] != 0) |
2013 | sel[len] = 0; /* Make sure it's terminated. */ | |
d4dbb9c7 | 2014 | |
f871bae1 | 2015 | return eval_op_objc_selector (expect_type, exp, noside, sel); |
a9fa03de AF |
2016 | } |
2017 | ||
2018 | case OP_OBJC_MSGCALL: | |
2019 | { /* Objective C message (method) call. */ | |
2020 | ||
17dd65ce TT |
2021 | CORE_ADDR responds_selector = 0; |
2022 | CORE_ADDR method_selector = 0; | |
a9fa03de | 2023 | |
c253954e | 2024 | CORE_ADDR selector = 0; |
a9fa03de | 2025 | |
a9fa03de | 2026 | int struct_return = 0; |
f486487f | 2027 | enum noside sub_no_side = EVAL_NORMAL; |
a9fa03de | 2028 | |
17dd65ce TT |
2029 | struct value *msg_send = NULL; |
2030 | struct value *msg_send_stret = NULL; | |
2031 | int gnu_runtime = 0; | |
a9fa03de AF |
2032 | |
2033 | struct value *target = NULL; | |
2034 | struct value *method = NULL; | |
2035 | struct value *called_method = NULL; | |
2036 | ||
2037 | struct type *selector_type = NULL; | |
d4dbb9c7 | 2038 | struct type *long_type; |
a9fa03de AF |
2039 | |
2040 | struct value *ret = NULL; | |
2041 | CORE_ADDR addr = 0; | |
2042 | ||
2043 | selector = exp->elts[pc + 1].longconst; | |
2044 | nargs = exp->elts[pc + 2].longconst; | |
8d749320 | 2045 | argvec = XALLOCAVEC (struct value *, nargs + 5); |
a9fa03de AF |
2046 | |
2047 | (*pos) += 3; | |
2048 | ||
d4dbb9c7 UW |
2049 | long_type = builtin_type (exp->gdbarch)->builtin_long; |
2050 | selector_type = builtin_type (exp->gdbarch)->builtin_data_ptr; | |
2051 | ||
a9fa03de AF |
2052 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
2053 | sub_no_side = EVAL_NORMAL; | |
2054 | else | |
2055 | sub_no_side = noside; | |
2056 | ||
2057 | target = evaluate_subexp (selector_type, exp, pos, sub_no_side); | |
2058 | ||
2059 | if (value_as_long (target) == 0) | |
d4dbb9c7 | 2060 | return value_from_longest (long_type, 0); |
a9fa03de | 2061 | |
3b7344d5 | 2062 | if (lookup_minimal_symbol ("objc_msg_lookup", 0, 0).minsym) |
a9fa03de AF |
2063 | gnu_runtime = 1; |
2064 | ||
2065 | /* Find the method dispatch (Apple runtime) or method lookup | |
2066 | (GNU runtime) function for Objective-C. These will be used | |
2067 | to lookup the symbol information for the method. If we | |
2068 | can't find any symbol information, then we'll use these to | |
2069 | call the method, otherwise we can call the method | |
0963b4bd | 2070 | directly. The msg_send_stret function is used in the special |
a9fa03de AF |
2071 | case of a method that returns a structure (Apple runtime |
2072 | only). */ | |
2073 | if (gnu_runtime) | |
2074 | { | |
b926417a | 2075 | type = selector_type; |
d7f9d729 | 2076 | |
c253954e JB |
2077 | type = lookup_function_type (type); |
2078 | type = lookup_pointer_type (type); | |
2079 | type = lookup_function_type (type); | |
2080 | type = lookup_pointer_type (type); | |
2081 | ||
3e3b026f UW |
2082 | msg_send = find_function_in_inferior ("objc_msg_lookup", NULL); |
2083 | msg_send_stret | |
2084 | = find_function_in_inferior ("objc_msg_lookup", NULL); | |
c253954e JB |
2085 | |
2086 | msg_send = value_from_pointer (type, value_as_address (msg_send)); | |
2087 | msg_send_stret = value_from_pointer (type, | |
2088 | value_as_address (msg_send_stret)); | |
a9fa03de AF |
2089 | } |
2090 | else | |
2091 | { | |
3e3b026f | 2092 | msg_send = find_function_in_inferior ("objc_msgSend", NULL); |
0963b4bd | 2093 | /* Special dispatcher for methods returning structs. */ |
3e3b026f UW |
2094 | msg_send_stret |
2095 | = find_function_in_inferior ("objc_msgSend_stret", NULL); | |
a9fa03de AF |
2096 | } |
2097 | ||
0963b4bd | 2098 | /* Verify the target object responds to this method. The |
a9fa03de AF |
2099 | standard top-level 'Object' class uses a different name for |
2100 | the verification method than the non-standard, but more | |
0963b4bd | 2101 | often used, 'NSObject' class. Make sure we check for both. */ |
a9fa03de | 2102 | |
3b7538c0 UW |
2103 | responds_selector |
2104 | = lookup_child_selector (exp->gdbarch, "respondsToSelector:"); | |
a9fa03de | 2105 | if (responds_selector == 0) |
3b7538c0 UW |
2106 | responds_selector |
2107 | = lookup_child_selector (exp->gdbarch, "respondsTo:"); | |
a9fa03de AF |
2108 | |
2109 | if (responds_selector == 0) | |
8a3fe4f8 | 2110 | error (_("no 'respondsTo:' or 'respondsToSelector:' method")); |
a9fa03de | 2111 | |
3b7538c0 UW |
2112 | method_selector |
2113 | = lookup_child_selector (exp->gdbarch, "methodForSelector:"); | |
a9fa03de | 2114 | if (method_selector == 0) |
3b7538c0 UW |
2115 | method_selector |
2116 | = lookup_child_selector (exp->gdbarch, "methodFor:"); | |
a9fa03de AF |
2117 | |
2118 | if (method_selector == 0) | |
8a3fe4f8 | 2119 | error (_("no 'methodFor:' or 'methodForSelector:' method")); |
a9fa03de AF |
2120 | |
2121 | /* Call the verification method, to make sure that the target | |
0963b4bd | 2122 | class implements the desired method. */ |
a9fa03de AF |
2123 | |
2124 | argvec[0] = msg_send; | |
2125 | argvec[1] = target; | |
d4dbb9c7 UW |
2126 | argvec[2] = value_from_longest (long_type, responds_selector); |
2127 | argvec[3] = value_from_longest (long_type, selector); | |
a9fa03de AF |
2128 | argvec[4] = 0; |
2129 | ||
e71585ff | 2130 | ret = call_function_by_hand (argvec[0], NULL, {argvec + 1, 3}); |
a9fa03de AF |
2131 | if (gnu_runtime) |
2132 | { | |
2133 | /* Function objc_msg_lookup returns a pointer. */ | |
2134 | argvec[0] = ret; | |
e71585ff | 2135 | ret = call_function_by_hand (argvec[0], NULL, {argvec + 1, 3}); |
a9fa03de AF |
2136 | } |
2137 | if (value_as_long (ret) == 0) | |
8a3fe4f8 | 2138 | error (_("Target does not respond to this message selector.")); |
a9fa03de AF |
2139 | |
2140 | /* Call "methodForSelector:" method, to get the address of a | |
2141 | function method that implements this selector for this | |
2142 | class. If we can find a symbol at that address, then we | |
2143 | know the return type, parameter types etc. (that's a good | |
0963b4bd | 2144 | thing). */ |
a9fa03de AF |
2145 | |
2146 | argvec[0] = msg_send; | |
2147 | argvec[1] = target; | |
d4dbb9c7 UW |
2148 | argvec[2] = value_from_longest (long_type, method_selector); |
2149 | argvec[3] = value_from_longest (long_type, selector); | |
a9fa03de AF |
2150 | argvec[4] = 0; |
2151 | ||
e71585ff | 2152 | ret = call_function_by_hand (argvec[0], NULL, {argvec + 1, 3}); |
a9fa03de AF |
2153 | if (gnu_runtime) |
2154 | { | |
2155 | argvec[0] = ret; | |
e71585ff | 2156 | ret = call_function_by_hand (argvec[0], NULL, {argvec + 1, 3}); |
a9fa03de AF |
2157 | } |
2158 | ||
2159 | /* ret should now be the selector. */ | |
2160 | ||
2161 | addr = value_as_long (ret); | |
2162 | if (addr) | |
2163 | { | |
2164 | struct symbol *sym = NULL; | |
a9fa03de | 2165 | |
69368a60 UW |
2166 | /* The address might point to a function descriptor; |
2167 | resolve it to the actual code address instead. */ | |
2168 | addr = gdbarch_convert_from_func_ptr_addr (exp->gdbarch, addr, | |
8b88a78e | 2169 | current_top_target ()); |
69368a60 UW |
2170 | |
2171 | /* Is it a high_level symbol? */ | |
a9fa03de AF |
2172 | sym = find_pc_function (addr); |
2173 | if (sym != NULL) | |
2174 | method = value_of_variable (sym, 0); | |
2175 | } | |
2176 | ||
2177 | /* If we found a method with symbol information, check to see | |
dda83cd7 | 2178 | if it returns a struct. Otherwise assume it doesn't. */ |
a9fa03de AF |
2179 | |
2180 | if (method) | |
2181 | { | |
a9fa03de | 2182 | CORE_ADDR funaddr; |
c055b101 | 2183 | struct type *val_type; |
a9fa03de | 2184 | |
c055b101 | 2185 | funaddr = find_function_addr (method, &val_type); |
a9fa03de | 2186 | |
262acaeb | 2187 | block_for_pc (funaddr); |
a9fa03de | 2188 | |
f168693b | 2189 | val_type = check_typedef (val_type); |
78134374 SM |
2190 | |
2191 | if ((val_type == NULL) | |
2192 | || (val_type->code () == TYPE_CODE_ERROR)) | |
a9fa03de AF |
2193 | { |
2194 | if (expect_type != NULL) | |
c055b101 | 2195 | val_type = expect_type; |
a9fa03de AF |
2196 | } |
2197 | ||
6a3a010b | 2198 | struct_return = using_struct_return (exp->gdbarch, method, |
3e43a32a | 2199 | val_type); |
a9fa03de AF |
2200 | } |
2201 | else if (expect_type != NULL) | |
2202 | { | |
d80b854b | 2203 | struct_return = using_struct_return (exp->gdbarch, NULL, |
c055b101 | 2204 | check_typedef (expect_type)); |
a9fa03de | 2205 | } |
78134374 | 2206 | |
a9fa03de AF |
2207 | /* Found a function symbol. Now we will substitute its |
2208 | value in place of the message dispatcher (obj_msgSend), | |
2209 | so that we call the method directly instead of thru | |
2210 | the dispatcher. The main reason for doing this is that | |
2211 | we can now evaluate the return value and parameter values | |
2212 | according to their known data types, in case we need to | |
2213 | do things like promotion, dereferencing, special handling | |
2214 | of structs and doubles, etc. | |
2215 | ||
2216 | We want to use the type signature of 'method', but still | |
2217 | jump to objc_msgSend() or objc_msgSend_stret() to better | |
2218 | mimic the behavior of the runtime. */ | |
2219 | ||
2220 | if (method) | |
2221 | { | |
78134374 | 2222 | if (value_type (method)->code () != TYPE_CODE_FUNC) |
3e43a32a MS |
2223 | error (_("method address has symbol information " |
2224 | "with non-function type; skipping")); | |
2225 | ||
2226 | /* Create a function pointer of the appropriate type, and | |
2227 | replace its value with the value of msg_send or | |
2228 | msg_send_stret. We must use a pointer here, as | |
2229 | msg_send and msg_send_stret are of pointer type, and | |
2230 | the representation may be different on systems that use | |
69368a60 | 2231 | function descriptors. */ |
a9fa03de | 2232 | if (struct_return) |
69368a60 UW |
2233 | called_method |
2234 | = value_from_pointer (lookup_pointer_type (value_type (method)), | |
2235 | value_as_address (msg_send_stret)); | |
a9fa03de | 2236 | else |
69368a60 UW |
2237 | called_method |
2238 | = value_from_pointer (lookup_pointer_type (value_type (method)), | |
2239 | value_as_address (msg_send)); | |
a9fa03de AF |
2240 | } |
2241 | else | |
2242 | { | |
2243 | if (struct_return) | |
2244 | called_method = msg_send_stret; | |
2245 | else | |
2246 | called_method = msg_send; | |
2247 | } | |
2248 | ||
2249 | if (noside == EVAL_SKIP) | |
827d0c51 | 2250 | return eval_skip_value (exp); |
a9fa03de AF |
2251 | |
2252 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
2253 | { | |
2254 | /* If the return type doesn't look like a function type, | |
2255 | call an error. This can happen if somebody tries to | |
0963b4bd | 2256 | turn a variable into a function call. This is here |
a9fa03de AF |
2257 | because people often want to call, eg, strcmp, which |
2258 | gdb doesn't know is a function. If gdb isn't asked for | |
2259 | it's opinion (ie. through "whatis"), it won't offer | |
0963b4bd | 2260 | it. */ |
a9fa03de | 2261 | |
b926417a | 2262 | struct type *callee_type = value_type (called_method); |
d7f9d729 | 2263 | |
78134374 | 2264 | if (callee_type && callee_type->code () == TYPE_CODE_PTR) |
b926417a TT |
2265 | callee_type = TYPE_TARGET_TYPE (callee_type); |
2266 | callee_type = TYPE_TARGET_TYPE (callee_type); | |
a9fa03de | 2267 | |
b926417a | 2268 | if (callee_type) |
a9fa03de | 2269 | { |
78134374 | 2270 | if ((callee_type->code () == TYPE_CODE_ERROR) && expect_type) |
a9fa03de AF |
2271 | return allocate_value (expect_type); |
2272 | else | |
b926417a | 2273 | return allocate_value (callee_type); |
a9fa03de AF |
2274 | } |
2275 | else | |
3e43a32a MS |
2276 | error (_("Expression of type other than " |
2277 | "\"method returning ...\" used as a method")); | |
a9fa03de AF |
2278 | } |
2279 | ||
2280 | /* Now depending on whether we found a symbol for the method, | |
2281 | we will either call the runtime dispatcher or the method | |
2282 | directly. */ | |
2283 | ||
2284 | argvec[0] = called_method; | |
2285 | argvec[1] = target; | |
d4dbb9c7 | 2286 | argvec[2] = value_from_longest (long_type, selector); |
a9fa03de AF |
2287 | /* User-supplied arguments. */ |
2288 | for (tem = 0; tem < nargs; tem++) | |
2289 | argvec[tem + 3] = evaluate_subexp_with_coercion (exp, pos, noside); | |
2290 | argvec[tem + 3] = 0; | |
2291 | ||
e71585ff PA |
2292 | auto call_args = gdb::make_array_view (argvec + 1, nargs + 2); |
2293 | ||
a9fa03de AF |
2294 | if (gnu_runtime && (method != NULL)) |
2295 | { | |
a9fa03de | 2296 | /* Function objc_msg_lookup returns a pointer. */ |
04624583 | 2297 | deprecated_set_value_type (argvec[0], |
69368a60 | 2298 | lookup_pointer_type (lookup_function_type (value_type (argvec[0])))); |
e71585ff | 2299 | argvec[0] = call_function_by_hand (argvec[0], NULL, call_args); |
a9fa03de | 2300 | } |
a9fa03de | 2301 | |
e71585ff | 2302 | return call_function_by_hand (argvec[0], NULL, call_args); |
a9fa03de AF |
2303 | } |
2304 | break; | |
2305 | ||
c906108c | 2306 | case OP_FUNCALL: |
e69570ee | 2307 | return evaluate_funcall (expect_type, exp, pos, noside); |
c906108c | 2308 | |
c906108c SS |
2309 | case OP_COMPLEX: |
2310 | /* We have a complex number, There should be 2 floating | |
dda83cd7 | 2311 | point numbers that compose it. */ |
c806c55a | 2312 | (*pos) += 2; |
fe1fe7ea SM |
2313 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
2314 | arg2 = evaluate_subexp (nullptr, exp, pos, noside); | |
c906108c | 2315 | |
c806c55a | 2316 | return value_literal_complex (arg1, arg2, exp->elts[pc + 1].type); |
c906108c SS |
2317 | |
2318 | case STRUCTOP_STRUCT: | |
2319 | tem = longest_to_int (exp->elts[pc + 1].longconst); | |
2320 | (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1); | |
fe1fe7ea | 2321 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
3e96c4fc TT |
2322 | return eval_op_structop_struct (expect_type, exp, noside, arg1, |
2323 | &exp->elts[pc + 2].string); | |
c906108c SS |
2324 | |
2325 | case STRUCTOP_PTR: | |
2326 | tem = longest_to_int (exp->elts[pc + 1].longconst); | |
2327 | (*pos) += 3 + BYTES_TO_EXP_ELEM (tem + 1); | |
fe1fe7ea | 2328 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
fb461aa3 TT |
2329 | return eval_op_structop_ptr (expect_type, exp, noside, op, arg1, |
2330 | &exp->elts[pc + 2].string); | |
c906108c SS |
2331 | |
2332 | case STRUCTOP_MEMBER: | |
0d5de010 DJ |
2333 | case STRUCTOP_MPTR: |
2334 | if (op == STRUCTOP_MEMBER) | |
2335 | arg1 = evaluate_subexp_for_address (exp, pos, noside); | |
2336 | else | |
fe1fe7ea | 2337 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
0d5de010 | 2338 | |
fe1fe7ea | 2339 | arg2 = evaluate_subexp (nullptr, exp, pos, noside); |
c906108c | 2340 | |
b7a96ed2 | 2341 | return eval_op_member (expect_type, exp, noside, arg1, arg2); |
c906108c | 2342 | |
072bba3b | 2343 | case TYPE_INSTANCE: |
3693fdb3 PA |
2344 | { |
2345 | type_instance_flags flags | |
2346 | = (type_instance_flag_value) longest_to_int (exp->elts[pc + 1].longconst); | |
2347 | nargs = longest_to_int (exp->elts[pc + 2].longconst); | |
2348 | arg_types = (struct type **) alloca (nargs * sizeof (struct type *)); | |
2349 | for (ix = 0; ix < nargs; ++ix) | |
2350 | arg_types[ix] = exp->elts[pc + 2 + ix + 1].type; | |
2351 | ||
b926417a | 2352 | fake_method fake_expect_type (flags, nargs, arg_types); |
3693fdb3 | 2353 | *(pos) += 4 + nargs; |
b926417a TT |
2354 | return evaluate_subexp_standard (fake_expect_type.type (), exp, pos, |
2355 | noside); | |
3693fdb3 | 2356 | } |
072bba3b | 2357 | |
c906108c SS |
2358 | case BINOP_CONCAT: |
2359 | arg1 = evaluate_subexp_with_coercion (exp, pos, noside); | |
2360 | arg2 = evaluate_subexp_with_coercion (exp, pos, noside); | |
5c2f201e | 2361 | return eval_op_concat (expect_type, exp, noside, op, arg1, arg2); |
c906108c SS |
2362 | |
2363 | case BINOP_ASSIGN: | |
fe1fe7ea | 2364 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
55708e99 TT |
2365 | /* Special-case assignments where the left-hand-side is a |
2366 | convenience variable -- in these, don't bother setting an | |
2367 | expected type. This avoids a weird case where re-assigning a | |
2368 | string or array to an internal variable could error with "Too | |
2369 | many array elements". */ | |
2370 | arg2 = evaluate_subexp (VALUE_LVAL (arg1) == lval_internalvar | |
fe1fe7ea SM |
2371 | ? nullptr |
2372 | : value_type (arg1), | |
55708e99 | 2373 | exp, pos, noside); |
c906108c | 2374 | |
c906108c SS |
2375 | if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS) |
2376 | return arg1; | |
2377 | if (binop_user_defined_p (op, arg1, arg2)) | |
2378 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); | |
2379 | else | |
2380 | return value_assign (arg1, arg2); | |
2381 | ||
2382 | case BINOP_ASSIGN_MODIFY: | |
2383 | (*pos) += 2; | |
fe1fe7ea | 2384 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
df407dfe | 2385 | arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside); |
c906108c SS |
2386 | if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS) |
2387 | return arg1; | |
2388 | op = exp->elts[pc + 1].opcode; | |
2389 | if (binop_user_defined_p (op, arg1, arg2)) | |
2390 | return value_x_binop (arg1, arg2, BINOP_ASSIGN_MODIFY, op, noside); | |
cc73bb8c TT |
2391 | else if (op == BINOP_ADD && ptrmath_type_p (exp->language_defn, |
2392 | value_type (arg1)) | |
2497b498 UW |
2393 | && is_integral_type (value_type (arg2))) |
2394 | arg2 = value_ptradd (arg1, value_as_long (arg2)); | |
cc73bb8c TT |
2395 | else if (op == BINOP_SUB && ptrmath_type_p (exp->language_defn, |
2396 | value_type (arg1)) | |
2497b498 UW |
2397 | && is_integral_type (value_type (arg2))) |
2398 | arg2 = value_ptradd (arg1, - value_as_long (arg2)); | |
c906108c | 2399 | else |
f44316fa UW |
2400 | { |
2401 | struct value *tmp = arg1; | |
2402 | ||
2403 | /* For shift and integer exponentiation operations, | |
2404 | only promote the first argument. */ | |
2405 | if ((op == BINOP_LSH || op == BINOP_RSH || op == BINOP_EXP) | |
2406 | && is_integral_type (value_type (arg2))) | |
2407 | unop_promote (exp->language_defn, exp->gdbarch, &tmp); | |
2408 | else | |
2409 | binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2); | |
2410 | ||
2411 | arg2 = value_binop (tmp, arg2, op); | |
2412 | } | |
c906108c SS |
2413 | return value_assign (arg1, arg2); |
2414 | ||
2415 | case BINOP_ADD: | |
2416 | arg1 = evaluate_subexp_with_coercion (exp, pos, noside); | |
2417 | arg2 = evaluate_subexp_with_coercion (exp, pos, noside); | |
aedaf9ac | 2418 | return eval_op_add (expect_type, exp, noside, op, arg1, arg2); |
c906108c SS |
2419 | |
2420 | case BINOP_SUB: | |
2421 | arg1 = evaluate_subexp_with_coercion (exp, pos, noside); | |
2422 | arg2 = evaluate_subexp_with_coercion (exp, pos, noside); | |
d9790e22 | 2423 | return eval_op_sub (expect_type, exp, noside, op, arg1, arg2); |
c906108c | 2424 | |
bd49c137 | 2425 | case BINOP_EXP: |
c906108c SS |
2426 | case BINOP_MUL: |
2427 | case BINOP_DIV: | |
9b3442ee | 2428 | case BINOP_INTDIV: |
c906108c SS |
2429 | case BINOP_REM: |
2430 | case BINOP_MOD: | |
2431 | case BINOP_LSH: | |
2432 | case BINOP_RSH: | |
2433 | case BINOP_BITWISE_AND: | |
2434 | case BINOP_BITWISE_IOR: | |
2435 | case BINOP_BITWISE_XOR: | |
fe1fe7ea SM |
2436 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
2437 | arg2 = evaluate_subexp (nullptr, exp, pos, noside); | |
7cdcdd02 | 2438 | return eval_op_binary (expect_type, exp, noside, op, arg1, arg2); |
c906108c | 2439 | |
c906108c | 2440 | case BINOP_SUBSCRIPT: |
fe1fe7ea SM |
2441 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
2442 | arg2 = evaluate_subexp (nullptr, exp, pos, noside); | |
288d26bc | 2443 | return eval_op_subscript (expect_type, exp, noside, op, arg1, arg2); |
c906108c | 2444 | |
c906108c SS |
2445 | case MULTI_SUBSCRIPT: |
2446 | (*pos) += 2; | |
2447 | nargs = longest_to_int (exp->elts[pc + 1].longconst); | |
2448 | arg1 = evaluate_subexp_with_coercion (exp, pos, noside); | |
c8f02daa TT |
2449 | argvec = XALLOCAVEC (struct value *, nargs); |
2450 | for (ix = 0; ix < nargs; ++ix) | |
2451 | argvec[ix] = evaluate_subexp_with_coercion (exp, pos, noside); | |
2452 | if (noside == EVAL_SKIP) | |
2453 | return arg1; | |
2454 | for (ix = 0; ix < nargs; ++ix) | |
c906108c | 2455 | { |
c8f02daa | 2456 | arg2 = argvec[ix]; |
c5aa993b | 2457 | |
c906108c SS |
2458 | if (binop_user_defined_p (op, arg1, arg2)) |
2459 | { | |
2460 | arg1 = value_x_binop (arg1, arg2, op, OP_NULL, noside); | |
2461 | } | |
2462 | else | |
2463 | { | |
afc05acb UW |
2464 | arg1 = coerce_ref (arg1); |
2465 | type = check_typedef (value_type (arg1)); | |
2466 | ||
78134374 | 2467 | switch (type->code ()) |
afc05acb UW |
2468 | { |
2469 | case TYPE_CODE_PTR: | |
2470 | case TYPE_CODE_ARRAY: | |
2471 | case TYPE_CODE_STRING: | |
2497b498 | 2472 | arg1 = value_subscript (arg1, value_as_long (arg2)); |
afc05acb UW |
2473 | break; |
2474 | ||
afc05acb | 2475 | default: |
7d93a1e0 | 2476 | if (type->name ()) |
afc05acb | 2477 | error (_("cannot subscript something of type `%s'"), |
7d93a1e0 | 2478 | type->name ()); |
afc05acb UW |
2479 | else |
2480 | error (_("cannot subscript requested type")); | |
2481 | } | |
c906108c SS |
2482 | } |
2483 | } | |
2484 | return (arg1); | |
2485 | ||
c906108c | 2486 | case BINOP_LOGICAL_AND: |
fe1fe7ea | 2487 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
c906108c SS |
2488 | if (noside == EVAL_SKIP) |
2489 | { | |
fe1fe7ea | 2490 | evaluate_subexp (nullptr, exp, pos, noside); |
827d0c51 | 2491 | return eval_skip_value (exp); |
c906108c | 2492 | } |
c5aa993b | 2493 | |
c906108c | 2494 | oldpos = *pos; |
fe1fe7ea | 2495 | arg2 = evaluate_subexp (nullptr, exp, pos, EVAL_AVOID_SIDE_EFFECTS); |
c906108c | 2496 | *pos = oldpos; |
c5aa993b JM |
2497 | |
2498 | if (binop_user_defined_p (op, arg1, arg2)) | |
c906108c | 2499 | { |
fe1fe7ea | 2500 | arg2 = evaluate_subexp (nullptr, exp, pos, noside); |
c906108c SS |
2501 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); |
2502 | } | |
2503 | else | |
2504 | { | |
2505 | tem = value_logical_not (arg1); | |
fe1fe7ea SM |
2506 | arg2 |
2507 | = evaluate_subexp (nullptr, exp, pos, (tem ? EVAL_SKIP : noside)); | |
fbb06eb1 UW |
2508 | type = language_bool_type (exp->language_defn, exp->gdbarch); |
2509 | return value_from_longest (type, | |
c5aa993b | 2510 | (LONGEST) (!tem && !value_logical_not (arg2))); |
c906108c SS |
2511 | } |
2512 | ||
2513 | case BINOP_LOGICAL_OR: | |
fe1fe7ea | 2514 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
c906108c SS |
2515 | if (noside == EVAL_SKIP) |
2516 | { | |
fe1fe7ea | 2517 | evaluate_subexp (nullptr, exp, pos, noside); |
827d0c51 | 2518 | return eval_skip_value (exp); |
c906108c | 2519 | } |
c5aa993b | 2520 | |
c906108c | 2521 | oldpos = *pos; |
fe1fe7ea | 2522 | arg2 = evaluate_subexp (nullptr, exp, pos, EVAL_AVOID_SIDE_EFFECTS); |
c906108c | 2523 | *pos = oldpos; |
c5aa993b JM |
2524 | |
2525 | if (binop_user_defined_p (op, arg1, arg2)) | |
c906108c | 2526 | { |
fe1fe7ea | 2527 | arg2 = evaluate_subexp (nullptr, exp, pos, noside); |
c906108c SS |
2528 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); |
2529 | } | |
2530 | else | |
2531 | { | |
2532 | tem = value_logical_not (arg1); | |
fe1fe7ea SM |
2533 | arg2 |
2534 | = evaluate_subexp (nullptr, exp, pos, (!tem ? EVAL_SKIP : noside)); | |
fbb06eb1 UW |
2535 | type = language_bool_type (exp->language_defn, exp->gdbarch); |
2536 | return value_from_longest (type, | |
c5aa993b | 2537 | (LONGEST) (!tem || !value_logical_not (arg2))); |
c906108c SS |
2538 | } |
2539 | ||
2540 | case BINOP_EQUAL: | |
fe1fe7ea | 2541 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
df407dfe | 2542 | arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside); |
0cc96de8 | 2543 | return eval_op_equal (expect_type, exp, noside, op, arg1, arg2); |
c906108c SS |
2544 | |
2545 | case BINOP_NOTEQUAL: | |
fe1fe7ea | 2546 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
df407dfe | 2547 | arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside); |
1fcb3559 | 2548 | return eval_op_notequal (expect_type, exp, noside, op, arg1, arg2); |
c906108c SS |
2549 | |
2550 | case BINOP_LESS: | |
fe1fe7ea | 2551 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
df407dfe | 2552 | arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside); |
6cad1349 | 2553 | return eval_op_less (expect_type, exp, noside, op, arg1, arg2); |
c906108c SS |
2554 | |
2555 | case BINOP_GTR: | |
fe1fe7ea | 2556 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
df407dfe | 2557 | arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside); |
1f78d732 | 2558 | return eval_op_gtr (expect_type, exp, noside, op, arg1, arg2); |
c906108c SS |
2559 | |
2560 | case BINOP_GEQ: | |
fe1fe7ea | 2561 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
df407dfe | 2562 | arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside); |
96e3efd9 | 2563 | return eval_op_geq (expect_type, exp, noside, op, arg1, arg2); |
c906108c SS |
2564 | |
2565 | case BINOP_LEQ: | |
fe1fe7ea | 2566 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
df407dfe | 2567 | arg2 = evaluate_subexp (value_type (arg1), exp, pos, noside); |
60cdd487 | 2568 | return eval_op_leq (expect_type, exp, noside, op, arg1, arg2); |
c906108c SS |
2569 | |
2570 | case BINOP_REPEAT: | |
fe1fe7ea SM |
2571 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
2572 | arg2 = evaluate_subexp (nullptr, exp, pos, noside); | |
c906108c | 2573 | if (noside == EVAL_SKIP) |
827d0c51 | 2574 | return eval_skip_value (exp); |
df407dfe | 2575 | type = check_typedef (value_type (arg2)); |
78134374 | 2576 | if (type->code () != TYPE_CODE_INT |
dda83cd7 | 2577 | && type->code () != TYPE_CODE_ENUM) |
8a3fe4f8 | 2578 | error (_("Non-integral right operand for \"@\" operator.")); |
c906108c SS |
2579 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
2580 | { | |
df407dfe | 2581 | return allocate_repeat_value (value_type (arg1), |
c5aa993b | 2582 | longest_to_int (value_as_long (arg2))); |
c906108c SS |
2583 | } |
2584 | else | |
2585 | return value_repeat (arg1, longest_to_int (value_as_long (arg2))); | |
2586 | ||
2587 | case BINOP_COMMA: | |
fe1fe7ea SM |
2588 | evaluate_subexp (nullptr, exp, pos, noside); |
2589 | return evaluate_subexp (nullptr, exp, pos, noside); | |
c906108c | 2590 | |
36e9969c | 2591 | case UNOP_PLUS: |
fe1fe7ea | 2592 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
36e9969c | 2593 | if (noside == EVAL_SKIP) |
827d0c51 | 2594 | return eval_skip_value (exp); |
36e9969c NS |
2595 | if (unop_user_defined_p (op, arg1)) |
2596 | return value_x_unop (arg1, op, noside); | |
2597 | else | |
f44316fa UW |
2598 | { |
2599 | unop_promote (exp->language_defn, exp->gdbarch, &arg1); | |
2600 | return value_pos (arg1); | |
2601 | } | |
36e9969c | 2602 | |
c906108c | 2603 | case UNOP_NEG: |
fe1fe7ea | 2604 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
c906108c | 2605 | if (noside == EVAL_SKIP) |
827d0c51 | 2606 | return eval_skip_value (exp); |
c906108c SS |
2607 | if (unop_user_defined_p (op, arg1)) |
2608 | return value_x_unop (arg1, op, noside); | |
2609 | else | |
f44316fa UW |
2610 | { |
2611 | unop_promote (exp->language_defn, exp->gdbarch, &arg1); | |
2612 | return value_neg (arg1); | |
2613 | } | |
c906108c SS |
2614 | |
2615 | case UNOP_COMPLEMENT: | |
2616 | /* C++: check for and handle destructor names. */ | |
c906108c | 2617 | |
fe1fe7ea | 2618 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
c906108c | 2619 | if (noside == EVAL_SKIP) |
827d0c51 | 2620 | return eval_skip_value (exp); |
c906108c SS |
2621 | if (unop_user_defined_p (UNOP_COMPLEMENT, arg1)) |
2622 | return value_x_unop (arg1, UNOP_COMPLEMENT, noside); | |
2623 | else | |
f44316fa UW |
2624 | { |
2625 | unop_promote (exp->language_defn, exp->gdbarch, &arg1); | |
2626 | return value_complement (arg1); | |
2627 | } | |
c906108c SS |
2628 | |
2629 | case UNOP_LOGICAL_NOT: | |
fe1fe7ea | 2630 | arg1 = evaluate_subexp (nullptr, exp, pos, noside); |
c906108c | 2631 | if (noside == EVAL_SKIP) |
827d0c51 | 2632 | return eval_skip_value (exp); |
c906108c SS |
2633 | if (unop_user_defined_p (op, arg1)) |
2634 | return value_x_unop (arg1, op, noside); | |
2635 | else | |
fbb06eb1 UW |
2636 | { |
2637 | type = language_bool_type (exp->language_defn, exp->gdbarch); | |
2638 | return value_from_longest (type, (LONGEST) value_logical_not (arg1)); | |
2639 | } | |
c906108c SS |
2640 | |
2641 | case UNOP_IND: | |
78134374 | 2642 | if (expect_type && expect_type->code () == TYPE_CODE_PTR) |
c5aa993b | 2643 | expect_type = TYPE_TARGET_TYPE (check_typedef (expect_type)); |
c906108c | 2644 | arg1 = evaluate_subexp (expect_type, exp, pos, noside); |
0d5de010 | 2645 | type = check_typedef (value_type (arg1)); |
78134374 SM |
2646 | if (type->code () == TYPE_CODE_METHODPTR |
2647 | || type->code () == TYPE_CODE_MEMBERPTR) | |
3e43a32a MS |
2648 | error (_("Attempt to dereference pointer " |
2649 | "to member without an object")); | |
c906108c | 2650 | if (noside == EVAL_SKIP) |
827d0c51 | 2651 | return eval_skip_value (exp); |
c906108c SS |
2652 | if (unop_user_defined_p (op, arg1)) |
2653 | return value_x_unop (arg1, op, noside); | |
2654 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
2655 | { | |
df407dfe | 2656 | type = check_typedef (value_type (arg1)); |
bc3c0632 AB |
2657 | |
2658 | /* If the type pointed to is dynamic then in order to resolve the | |
2659 | dynamic properties we must actually dereference the pointer. | |
2660 | There is a risk that this dereference will have side-effects | |
2661 | in the inferior, but being able to print accurate type | |
2662 | information seems worth the risk. */ | |
2663 | if ((type->code () != TYPE_CODE_PTR | |
2664 | && !TYPE_IS_REFERENCE (type)) | |
2665 | || !is_dynamic_type (TYPE_TARGET_TYPE (type))) | |
2666 | { | |
2667 | if (type->code () == TYPE_CODE_PTR | |
2668 | || TYPE_IS_REFERENCE (type) | |
2669 | /* In C you can dereference an array to get the 1st elt. */ | |
2670 | || type->code () == TYPE_CODE_ARRAY) | |
2671 | return value_zero (TYPE_TARGET_TYPE (type), | |
2672 | lval_memory); | |
2673 | else if (type->code () == TYPE_CODE_INT) | |
2674 | /* GDB allows dereferencing an int. */ | |
2675 | return value_zero (builtin_type (exp->gdbarch)->builtin_int, | |
2676 | lval_memory); | |
2677 | else | |
2678 | error (_("Attempt to take contents of a non-pointer value.")); | |
2679 | } | |
c906108c | 2680 | } |
22fe0fbb UW |
2681 | |
2682 | /* Allow * on an integer so we can cast it to whatever we want. | |
2683 | This returns an int, which seems like the most C-like thing to | |
2684 | do. "long long" variables are rare enough that | |
2685 | BUILTIN_TYPE_LONGEST would seem to be a mistake. */ | |
78134374 | 2686 | if (type->code () == TYPE_CODE_INT) |
22fe0fbb UW |
2687 | return value_at_lazy (builtin_type (exp->gdbarch)->builtin_int, |
2688 | (CORE_ADDR) value_as_address (arg1)); | |
c906108c SS |
2689 | return value_ind (arg1); |
2690 | ||
2691 | case UNOP_ADDR: | |
2692 | /* C++: check for and handle pointer to members. */ | |
c5aa993b | 2693 | |
c906108c SS |
2694 | if (noside == EVAL_SKIP) |
2695 | { | |
fe1fe7ea | 2696 | evaluate_subexp (nullptr, exp, pos, EVAL_SKIP); |
827d0c51 | 2697 | return eval_skip_value (exp); |
c906108c | 2698 | } |
c5aa993b | 2699 | else |
cbfa382a | 2700 | return evaluate_subexp_for_address (exp, pos, noside); |
c5aa993b | 2701 | |
c906108c SS |
2702 | case UNOP_SIZEOF: |
2703 | if (noside == EVAL_SKIP) | |
2704 | { | |
fe1fe7ea | 2705 | evaluate_subexp (nullptr, exp, pos, EVAL_SKIP); |
827d0c51 | 2706 | return eval_skip_value (exp); |
c906108c | 2707 | } |
5ecaaa66 | 2708 | return evaluate_subexp_for_sizeof (exp, pos, noside); |
c906108c | 2709 | |
007e1530 TT |
2710 | case UNOP_ALIGNOF: |
2711 | { | |
fe1fe7ea SM |
2712 | type = value_type ( |
2713 | evaluate_subexp (nullptr, exp, pos, EVAL_AVOID_SIDE_EFFECTS)); | |
007e1530 TT |
2714 | /* FIXME: This should be size_t. */ |
2715 | struct type *size_type = builtin_type (exp->gdbarch)->builtin_int; | |
2716 | ULONGEST align = type_align (type); | |
2717 | if (align == 0) | |
2718 | error (_("could not determine alignment of type")); | |
2719 | return value_from_longest (size_type, align); | |
2720 | } | |
2721 | ||
c906108c SS |
2722 | case UNOP_CAST: |
2723 | (*pos) += 2; | |
2724 | type = exp->elts[pc + 1].type; | |
46a4882b | 2725 | return evaluate_subexp_for_cast (exp, pos, noside, type); |
c906108c | 2726 | |
9eaf6705 TT |
2727 | case UNOP_CAST_TYPE: |
2728 | arg1 = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS); | |
2729 | type = value_type (arg1); | |
46a4882b | 2730 | return evaluate_subexp_for_cast (exp, pos, noside, type); |
9eaf6705 | 2731 | |
4e8f195d | 2732 | case UNOP_DYNAMIC_CAST: |
9eaf6705 TT |
2733 | arg1 = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS); |
2734 | type = value_type (arg1); | |
4e8f195d TT |
2735 | arg1 = evaluate_subexp (type, exp, pos, noside); |
2736 | if (noside == EVAL_SKIP) | |
827d0c51 | 2737 | return eval_skip_value (exp); |
4e8f195d TT |
2738 | return value_dynamic_cast (type, arg1); |
2739 | ||
2740 | case UNOP_REINTERPRET_CAST: | |
9eaf6705 TT |
2741 | arg1 = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS); |
2742 | type = value_type (arg1); | |
4e8f195d TT |
2743 | arg1 = evaluate_subexp (type, exp, pos, noside); |
2744 | if (noside == EVAL_SKIP) | |
827d0c51 | 2745 | return eval_skip_value (exp); |
4e8f195d TT |
2746 | return value_reinterpret_cast (type, arg1); |
2747 | ||
c906108c SS |
2748 | case UNOP_MEMVAL: |
2749 | (*pos) += 2; | |
2750 | arg1 = evaluate_subexp (expect_type, exp, pos, noside); | |
2751 | if (noside == EVAL_SKIP) | |
827d0c51 | 2752 | return eval_skip_value (exp); |
c906108c SS |
2753 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
2754 | return value_zero (exp->elts[pc + 1].type, lval_memory); | |
2755 | else | |
2756 | return value_at_lazy (exp->elts[pc + 1].type, | |
00a4c844 | 2757 | value_as_address (arg1)); |
c906108c | 2758 | |
9eaf6705 TT |
2759 | case UNOP_MEMVAL_TYPE: |
2760 | arg1 = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS); | |
2761 | type = value_type (arg1); | |
2762 | arg1 = evaluate_subexp (expect_type, exp, pos, noside); | |
2763 | if (noside == EVAL_SKIP) | |
827d0c51 | 2764 | return eval_skip_value (exp); |
9eaf6705 | 2765 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
4f485ebc | 2766 | return value_zero (type, lval_memory); |
9eaf6705 | 2767 | else |
4f485ebc | 2768 | return value_at_lazy (type, value_as_address (arg1)); |
9eaf6705 | 2769 | |
c906108c SS |
2770 | case UNOP_PREINCREMENT: |
2771 | arg1 = evaluate_subexp (expect_type, exp, pos, noside); | |
2772 | if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS) | |
2773 | return arg1; | |
2774 | else if (unop_user_defined_p (op, arg1)) | |
2775 | { | |
2776 | return value_x_unop (arg1, op, noside); | |
2777 | } | |
2778 | else | |
2779 | { | |
cc73bb8c | 2780 | if (ptrmath_type_p (exp->language_defn, value_type (arg1))) |
2497b498 | 2781 | arg2 = value_ptradd (arg1, 1); |
89eef114 | 2782 | else |
f44316fa UW |
2783 | { |
2784 | struct value *tmp = arg1; | |
d7f9d729 | 2785 | |
18a46dbe | 2786 | arg2 = value_one (value_type (arg1)); |
f44316fa UW |
2787 | binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2); |
2788 | arg2 = value_binop (tmp, arg2, BINOP_ADD); | |
2789 | } | |
89eef114 | 2790 | |
c906108c SS |
2791 | return value_assign (arg1, arg2); |
2792 | } | |
2793 | ||
2794 | case UNOP_PREDECREMENT: | |
2795 | arg1 = evaluate_subexp (expect_type, exp, pos, noside); | |
2796 | if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS) | |
2797 | return arg1; | |
2798 | else if (unop_user_defined_p (op, arg1)) | |
2799 | { | |
2800 | return value_x_unop (arg1, op, noside); | |
2801 | } | |
2802 | else | |
2803 | { | |
cc73bb8c | 2804 | if (ptrmath_type_p (exp->language_defn, value_type (arg1))) |
2497b498 | 2805 | arg2 = value_ptradd (arg1, -1); |
89eef114 | 2806 | else |
f44316fa UW |
2807 | { |
2808 | struct value *tmp = arg1; | |
d7f9d729 | 2809 | |
18a46dbe | 2810 | arg2 = value_one (value_type (arg1)); |
f44316fa UW |
2811 | binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2); |
2812 | arg2 = value_binop (tmp, arg2, BINOP_SUB); | |
2813 | } | |
89eef114 | 2814 | |
c906108c SS |
2815 | return value_assign (arg1, arg2); |
2816 | } | |
2817 | ||
2818 | case UNOP_POSTINCREMENT: | |
2819 | arg1 = evaluate_subexp (expect_type, exp, pos, noside); | |
2820 | if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS) | |
2821 | return arg1; | |
2822 | else if (unop_user_defined_p (op, arg1)) | |
2823 | { | |
2824 | return value_x_unop (arg1, op, noside); | |
2825 | } | |
2826 | else | |
2827 | { | |
c37f7098 KW |
2828 | arg3 = value_non_lval (arg1); |
2829 | ||
cc73bb8c | 2830 | if (ptrmath_type_p (exp->language_defn, value_type (arg1))) |
2497b498 | 2831 | arg2 = value_ptradd (arg1, 1); |
89eef114 | 2832 | else |
f44316fa UW |
2833 | { |
2834 | struct value *tmp = arg1; | |
d7f9d729 | 2835 | |
18a46dbe | 2836 | arg2 = value_one (value_type (arg1)); |
f44316fa UW |
2837 | binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2); |
2838 | arg2 = value_binop (tmp, arg2, BINOP_ADD); | |
2839 | } | |
89eef114 | 2840 | |
c906108c | 2841 | value_assign (arg1, arg2); |
c37f7098 | 2842 | return arg3; |
c906108c SS |
2843 | } |
2844 | ||
2845 | case UNOP_POSTDECREMENT: | |
2846 | arg1 = evaluate_subexp (expect_type, exp, pos, noside); | |
2847 | if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS) | |
2848 | return arg1; | |
2849 | else if (unop_user_defined_p (op, arg1)) | |
2850 | { | |
2851 | return value_x_unop (arg1, op, noside); | |
2852 | } | |
2853 | else | |
2854 | { | |
c37f7098 KW |
2855 | arg3 = value_non_lval (arg1); |
2856 | ||
cc73bb8c | 2857 | if (ptrmath_type_p (exp->language_defn, value_type (arg1))) |
2497b498 | 2858 | arg2 = value_ptradd (arg1, -1); |
89eef114 | 2859 | else |
f44316fa UW |
2860 | { |
2861 | struct value *tmp = arg1; | |
d7f9d729 | 2862 | |
18a46dbe | 2863 | arg2 = value_one (value_type (arg1)); |
f44316fa UW |
2864 | binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2); |
2865 | arg2 = value_binop (tmp, arg2, BINOP_SUB); | |
2866 | } | |
89eef114 | 2867 | |
c906108c | 2868 | value_assign (arg1, arg2); |
c37f7098 | 2869 | return arg3; |
c906108c | 2870 | } |
c5aa993b | 2871 | |
c906108c SS |
2872 | case OP_THIS: |
2873 | (*pos) += 1; | |
85bc8cb7 | 2874 | return value_of_this (exp->language_defn); |
a9fa03de | 2875 | |
c906108c | 2876 | case OP_TYPE: |
d843c49c | 2877 | /* The value is not supposed to be used. This is here to make it |
dda83cd7 | 2878 | easier to accommodate expressions that contain types. */ |
d843c49c FF |
2879 | (*pos) += 2; |
2880 | if (noside == EVAL_SKIP) | |
827d0c51 | 2881 | return eval_skip_value (exp); |
d843c49c | 2882 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) |
c973d0aa | 2883 | return allocate_value (exp->elts[pc + 1].type); |
d843c49c | 2884 | else |
dda83cd7 | 2885 | error (_("Attempt to use a type name as an expression")); |
c906108c | 2886 | |
608b4967 TT |
2887 | case OP_TYPEOF: |
2888 | case OP_DECLTYPE: | |
2889 | if (noside == EVAL_SKIP) | |
2890 | { | |
fe1fe7ea | 2891 | evaluate_subexp (nullptr, exp, pos, EVAL_SKIP); |
827d0c51 | 2892 | return eval_skip_value (exp); |
608b4967 TT |
2893 | } |
2894 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
2895 | { | |
2896 | enum exp_opcode sub_op = exp->elts[*pos].opcode; | |
2897 | struct value *result; | |
2898 | ||
fe1fe7ea | 2899 | result = evaluate_subexp (nullptr, exp, pos, EVAL_AVOID_SIDE_EFFECTS); |
608b4967 TT |
2900 | |
2901 | /* 'decltype' has special semantics for lvalues. */ | |
2902 | if (op == OP_DECLTYPE | |
2903 | && (sub_op == BINOP_SUBSCRIPT | |
2904 | || sub_op == STRUCTOP_MEMBER | |
2905 | || sub_op == STRUCTOP_MPTR | |
2906 | || sub_op == UNOP_IND | |
2907 | || sub_op == STRUCTOP_STRUCT | |
2908 | || sub_op == STRUCTOP_PTR | |
2909 | || sub_op == OP_SCOPE)) | |
2910 | { | |
b926417a | 2911 | type = value_type (result); |
608b4967 | 2912 | |
aa006118 | 2913 | if (!TYPE_IS_REFERENCE (type)) |
608b4967 | 2914 | { |
3b224330 | 2915 | type = lookup_lvalue_reference_type (type); |
608b4967 TT |
2916 | result = allocate_value (type); |
2917 | } | |
2918 | } | |
2919 | ||
2920 | return result; | |
2921 | } | |
2922 | else | |
dda83cd7 | 2923 | error (_("Attempt to use a type as an expression")); |
608b4967 | 2924 | |
6e72ca20 TT |
2925 | case OP_TYPEID: |
2926 | { | |
2927 | struct value *result; | |
2928 | enum exp_opcode sub_op = exp->elts[*pos].opcode; | |
2929 | ||
2930 | if (sub_op == OP_TYPE || sub_op == OP_DECLTYPE || sub_op == OP_TYPEOF) | |
fe1fe7ea | 2931 | result = evaluate_subexp (nullptr, exp, pos, EVAL_AVOID_SIDE_EFFECTS); |
6e72ca20 | 2932 | else |
fe1fe7ea | 2933 | result = evaluate_subexp (nullptr, exp, pos, noside); |
6e72ca20 TT |
2934 | |
2935 | if (noside != EVAL_NORMAL) | |
2936 | return allocate_value (cplus_typeid_type (exp->gdbarch)); | |
2937 | ||
2938 | return cplus_typeid (result); | |
2939 | } | |
2940 | ||
c906108c SS |
2941 | default: |
2942 | /* Removing this case and compiling with gcc -Wall reveals that | |
dda83cd7 SM |
2943 | a lot of cases are hitting this case. Some of these should |
2944 | probably be removed from expression.h; others are legitimate | |
2945 | expressions which are (apparently) not fully implemented. | |
c906108c | 2946 | |
dda83cd7 SM |
2947 | If there are any cases landing here which mean a user error, |
2948 | then they should be separate cases, with more descriptive | |
2949 | error messages. */ | |
c906108c | 2950 | |
3e43a32a MS |
2951 | error (_("GDB does not (yet) know how to " |
2952 | "evaluate that kind of expression")); | |
c906108c SS |
2953 | } |
2954 | ||
827d0c51 | 2955 | gdb_assert_not_reached ("missed return?"); |
c906108c SS |
2956 | } |
2957 | \f | |
2958 | /* Evaluate a subexpression of EXP, at index *POS, | |
2959 | and return the address of that subexpression. | |
2960 | Advance *POS over the subexpression. | |
2961 | If the subexpression isn't an lvalue, get an error. | |
2962 | NOSIDE may be EVAL_AVOID_SIDE_EFFECTS; | |
2963 | then only the type of the result need be correct. */ | |
2964 | ||
61051030 | 2965 | static struct value * |
aa1ee363 | 2966 | evaluate_subexp_for_address (struct expression *exp, int *pos, |
fba45db2 | 2967 | enum noside noside) |
c906108c SS |
2968 | { |
2969 | enum exp_opcode op; | |
52f0bd74 | 2970 | int pc; |
c906108c | 2971 | struct symbol *var; |
ab5c9f60 | 2972 | struct value *x; |
0d5de010 | 2973 | int tem; |
c906108c SS |
2974 | |
2975 | pc = (*pos); | |
2976 | op = exp->elts[pc].opcode; | |
2977 | ||
2978 | switch (op) | |
2979 | { | |
2980 | case UNOP_IND: | |
2981 | (*pos)++; | |
fe1fe7ea | 2982 | x = evaluate_subexp (nullptr, exp, pos, noside); |
ab5c9f60 DJ |
2983 | |
2984 | /* We can't optimize out "&*" if there's a user-defined operator*. */ | |
2985 | if (unop_user_defined_p (op, x)) | |
2986 | { | |
2987 | x = value_x_unop (x, op, noside); | |
0d5de010 | 2988 | goto default_case_after_eval; |
ab5c9f60 DJ |
2989 | } |
2990 | ||
708ead4e | 2991 | return coerce_array (x); |
c906108c SS |
2992 | |
2993 | case UNOP_MEMVAL: | |
2994 | (*pos) += 3; | |
2995 | return value_cast (lookup_pointer_type (exp->elts[pc + 1].type), | |
fe1fe7ea | 2996 | evaluate_subexp (nullptr, exp, pos, noside)); |
c906108c | 2997 | |
9eaf6705 TT |
2998 | case UNOP_MEMVAL_TYPE: |
2999 | { | |
3000 | struct type *type; | |
3001 | ||
3002 | (*pos) += 1; | |
fe1fe7ea | 3003 | x = evaluate_subexp (nullptr, exp, pos, EVAL_AVOID_SIDE_EFFECTS); |
9eaf6705 TT |
3004 | type = value_type (x); |
3005 | return value_cast (lookup_pointer_type (type), | |
fe1fe7ea | 3006 | evaluate_subexp (nullptr, exp, pos, noside)); |
9eaf6705 TT |
3007 | } |
3008 | ||
c906108c SS |
3009 | case OP_VAR_VALUE: |
3010 | var = exp->elts[pc + 2].symbol; | |
3011 | ||
3012 | /* C++: The "address" of a reference should yield the address | |
0963b4bd | 3013 | * of the object pointed to. Let value_addr() deal with it. */ |
aa006118 | 3014 | if (TYPE_IS_REFERENCE (SYMBOL_TYPE (var))) |
c5aa993b | 3015 | goto default_case; |
c906108c SS |
3016 | |
3017 | (*pos) += 4; | |
3018 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
3019 | { | |
3020 | struct type *type = | |
d7f9d729 | 3021 | lookup_pointer_type (SYMBOL_TYPE (var)); |
c906108c SS |
3022 | enum address_class sym_class = SYMBOL_CLASS (var); |
3023 | ||
3024 | if (sym_class == LOC_CONST | |
3025 | || sym_class == LOC_CONST_BYTES | |
2a2d4dc3 | 3026 | || sym_class == LOC_REGISTER) |
8a3fe4f8 | 3027 | error (_("Attempt to take address of register or constant.")); |
c906108c | 3028 | |
c5aa993b JM |
3029 | return |
3030 | value_zero (type, not_lval); | |
c906108c | 3031 | } |
ceef53c1 | 3032 | else |
61212c0f | 3033 | return address_of_variable (var, exp->elts[pc + 1].block); |
c906108c | 3034 | |
46a4882b PA |
3035 | case OP_VAR_MSYM_VALUE: |
3036 | { | |
3037 | (*pos) += 4; | |
3038 | ||
3039 | value *val = evaluate_var_msym_value (noside, | |
3040 | exp->elts[pc + 1].objfile, | |
3041 | exp->elts[pc + 2].msymbol); | |
3042 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
3043 | { | |
3044 | struct type *type = lookup_pointer_type (value_type (val)); | |
3045 | return value_zero (type, not_lval); | |
3046 | } | |
3047 | else | |
3048 | return value_addr (val); | |
3049 | } | |
3050 | ||
0d5de010 DJ |
3051 | case OP_SCOPE: |
3052 | tem = longest_to_int (exp->elts[pc + 2].longconst); | |
3053 | (*pos) += 5 + BYTES_TO_EXP_ELEM (tem + 1); | |
3054 | x = value_aggregate_elt (exp->elts[pc + 1].type, | |
3055 | &exp->elts[pc + 3].string, | |
072bba3b | 3056 | NULL, 1, noside); |
0d5de010 DJ |
3057 | if (x == NULL) |
3058 | error (_("There is no field named %s"), &exp->elts[pc + 3].string); | |
3059 | return x; | |
3060 | ||
c906108c SS |
3061 | default: |
3062 | default_case: | |
fe1fe7ea | 3063 | x = evaluate_subexp (nullptr, exp, pos, noside); |
0d5de010 | 3064 | default_case_after_eval: |
c906108c SS |
3065 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
3066 | { | |
0d5de010 DJ |
3067 | struct type *type = check_typedef (value_type (x)); |
3068 | ||
aa006118 | 3069 | if (TYPE_IS_REFERENCE (type)) |
0d5de010 DJ |
3070 | return value_zero (lookup_pointer_type (TYPE_TARGET_TYPE (type)), |
3071 | not_lval); | |
4819b3f8 PA |
3072 | else if (VALUE_LVAL (x) == lval_memory || value_must_coerce_to_target (x)) |
3073 | return value_zero (lookup_pointer_type (value_type (x)), | |
3074 | not_lval); | |
c906108c | 3075 | else |
3e43a32a MS |
3076 | error (_("Attempt to take address of " |
3077 | "value not located in memory.")); | |
c906108c | 3078 | } |
ab5c9f60 | 3079 | return value_addr (x); |
c906108c SS |
3080 | } |
3081 | } | |
3082 | ||
3083 | /* Evaluate like `evaluate_subexp' except coercing arrays to pointers. | |
3084 | When used in contexts where arrays will be coerced anyway, this is | |
3085 | equivalent to `evaluate_subexp' but much faster because it avoids | |
3086 | actually fetching array contents (perhaps obsolete now that we have | |
d69fe07e | 3087 | value_lazy()). |
c906108c SS |
3088 | |
3089 | Note that we currently only do the coercion for C expressions, where | |
3090 | arrays are zero based and the coercion is correct. For other languages, | |
3091 | with nonzero based arrays, coercion loses. Use CAST_IS_CONVERSION | |
0963b4bd | 3092 | to decide if coercion is appropriate. */ |
c906108c | 3093 | |
61051030 | 3094 | struct value * |
aa1ee363 AC |
3095 | evaluate_subexp_with_coercion (struct expression *exp, |
3096 | int *pos, enum noside noside) | |
c906108c | 3097 | { |
52f0bd74 AC |
3098 | enum exp_opcode op; |
3099 | int pc; | |
61051030 | 3100 | struct value *val; |
c906108c | 3101 | struct symbol *var; |
61212c0f | 3102 | struct type *type; |
c906108c SS |
3103 | |
3104 | pc = (*pos); | |
3105 | op = exp->elts[pc].opcode; | |
3106 | ||
3107 | switch (op) | |
3108 | { | |
3109 | case OP_VAR_VALUE: | |
3110 | var = exp->elts[pc + 2].symbol; | |
61212c0f | 3111 | type = check_typedef (SYMBOL_TYPE (var)); |
78134374 | 3112 | if (type->code () == TYPE_CODE_ARRAY |
bd63c870 | 3113 | && !type->is_vector () |
cc73bb8c | 3114 | && CAST_IS_CONVERSION (exp->language_defn)) |
c906108c SS |
3115 | { |
3116 | (*pos) += 4; | |
61212c0f UW |
3117 | val = address_of_variable (var, exp->elts[pc + 1].block); |
3118 | return value_cast (lookup_pointer_type (TYPE_TARGET_TYPE (type)), | |
c906108c SS |
3119 | val); |
3120 | } | |
3121 | /* FALLTHROUGH */ | |
3122 | ||
3123 | default: | |
fe1fe7ea | 3124 | return evaluate_subexp (nullptr, exp, pos, noside); |
c906108c SS |
3125 | } |
3126 | } | |
3127 | ||
3128 | /* Evaluate a subexpression of EXP, at index *POS, | |
3129 | and return a value for the size of that subexpression. | |
5ecaaa66 SA |
3130 | Advance *POS over the subexpression. If NOSIDE is EVAL_NORMAL |
3131 | we allow side-effects on the operand if its type is a variable | |
3132 | length array. */ | |
c906108c | 3133 | |
61051030 | 3134 | static struct value * |
5ecaaa66 SA |
3135 | evaluate_subexp_for_sizeof (struct expression *exp, int *pos, |
3136 | enum noside noside) | |
c906108c | 3137 | { |
98b90dd8 UW |
3138 | /* FIXME: This should be size_t. */ |
3139 | struct type *size_type = builtin_type (exp->gdbarch)->builtin_int; | |
c906108c | 3140 | enum exp_opcode op; |
52f0bd74 | 3141 | int pc; |
c906108c | 3142 | struct type *type; |
61051030 | 3143 | struct value *val; |
c906108c SS |
3144 | |
3145 | pc = (*pos); | |
3146 | op = exp->elts[pc].opcode; | |
3147 | ||
3148 | switch (op) | |
3149 | { | |
3150 | /* This case is handled specially | |
dda83cd7 SM |
3151 | so that we avoid creating a value for the result type. |
3152 | If the result type is very big, it's desirable not to | |
3153 | create a value unnecessarily. */ | |
c906108c SS |
3154 | case UNOP_IND: |
3155 | (*pos)++; | |
fe1fe7ea | 3156 | val = evaluate_subexp (nullptr, exp, pos, EVAL_AVOID_SIDE_EFFECTS); |
df407dfe | 3157 | type = check_typedef (value_type (val)); |
78134374 | 3158 | if (type->code () != TYPE_CODE_PTR |
aa006118 | 3159 | && !TYPE_IS_REFERENCE (type) |
78134374 | 3160 | && type->code () != TYPE_CODE_ARRAY) |
8a3fe4f8 | 3161 | error (_("Attempt to take contents of a non-pointer value.")); |
6b662e19 | 3162 | type = TYPE_TARGET_TYPE (type); |
3c8452d4 SA |
3163 | if (is_dynamic_type (type)) |
3164 | type = value_type (value_ind (val)); | |
3165 | return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type)); | |
c906108c SS |
3166 | |
3167 | case UNOP_MEMVAL: | |
3168 | (*pos) += 3; | |
245a5f0b KS |
3169 | type = exp->elts[pc + 1].type; |
3170 | break; | |
c906108c | 3171 | |
9eaf6705 TT |
3172 | case UNOP_MEMVAL_TYPE: |
3173 | (*pos) += 1; | |
3174 | val = evaluate_subexp (NULL, exp, pos, EVAL_AVOID_SIDE_EFFECTS); | |
245a5f0b KS |
3175 | type = value_type (val); |
3176 | break; | |
9eaf6705 | 3177 | |
c906108c | 3178 | case OP_VAR_VALUE: |
6b662e19 | 3179 | type = SYMBOL_TYPE (exp->elts[pc + 2].symbol); |
4ad88275 SA |
3180 | if (is_dynamic_type (type)) |
3181 | { | |
fe1fe7ea | 3182 | val = evaluate_subexp (nullptr, exp, pos, EVAL_NORMAL); |
4ad88275 | 3183 | type = value_type (val); |
b7874836 AB |
3184 | if (type->code () == TYPE_CODE_ARRAY) |
3185 | { | |
3186 | if (type_not_allocated (type) || type_not_associated (type)) | |
3187 | return value_zero (size_type, not_lval); | |
3188 | else if (is_dynamic_type (type->index_type ()) | |
3189 | && type->bounds ()->high.kind () == PROP_UNDEFINED) | |
3190 | return allocate_optimized_out_value (size_type); | |
3191 | } | |
4ad88275 SA |
3192 | } |
3193 | else | |
3194 | (*pos) += 4; | |
245a5f0b | 3195 | break; |
c906108c | 3196 | |
46a4882b PA |
3197 | case OP_VAR_MSYM_VALUE: |
3198 | { | |
3199 | (*pos) += 4; | |
3200 | ||
3201 | minimal_symbol *msymbol = exp->elts[pc + 2].msymbol; | |
b926417a TT |
3202 | value *mval = evaluate_var_msym_value (noside, |
3203 | exp->elts[pc + 1].objfile, | |
3204 | msymbol); | |
46a4882b | 3205 | |
b926417a | 3206 | type = value_type (mval); |
78134374 | 3207 | if (type->code () == TYPE_CODE_ERROR) |
c9d95fa3 | 3208 | error_unknown_type (msymbol->print_name ()); |
46a4882b PA |
3209 | |
3210 | return value_from_longest (size_type, TYPE_LENGTH (type)); | |
3211 | } | |
3212 | break; | |
3213 | ||
5ecaaa66 SA |
3214 | /* Deal with the special case if NOSIDE is EVAL_NORMAL and the resulting |
3215 | type of the subscript is a variable length array type. In this case we | |
85102364 | 3216 | must re-evaluate the right hand side of the subscription to allow |
5ecaaa66 SA |
3217 | side-effects. */ |
3218 | case BINOP_SUBSCRIPT: | |
3219 | if (noside == EVAL_NORMAL) | |
3220 | { | |
b926417a | 3221 | int npc = (*pos) + 1; |
5ecaaa66 | 3222 | |
fe1fe7ea | 3223 | val = evaluate_subexp (nullptr, exp, &npc, EVAL_AVOID_SIDE_EFFECTS); |
5ecaaa66 | 3224 | type = check_typedef (value_type (val)); |
78134374 | 3225 | if (type->code () == TYPE_CODE_ARRAY) |
5ecaaa66 SA |
3226 | { |
3227 | type = check_typedef (TYPE_TARGET_TYPE (type)); | |
78134374 | 3228 | if (type->code () == TYPE_CODE_ARRAY) |
5ecaaa66 | 3229 | { |
3d967001 | 3230 | type = type->index_type (); |
5ecaaa66 SA |
3231 | /* Only re-evaluate the right hand side if the resulting type |
3232 | is a variable length type. */ | |
599088e3 | 3233 | if (type->bounds ()->flag_bound_evaluated) |
5ecaaa66 | 3234 | { |
fe1fe7ea | 3235 | val = evaluate_subexp (nullptr, exp, pos, EVAL_NORMAL); |
5ecaaa66 SA |
3236 | return value_from_longest |
3237 | (size_type, (LONGEST) TYPE_LENGTH (value_type (val))); | |
3238 | } | |
3239 | } | |
3240 | } | |
3241 | } | |
3242 | ||
3243 | /* Fall through. */ | |
3244 | ||
c906108c | 3245 | default: |
fe1fe7ea | 3246 | val = evaluate_subexp (nullptr, exp, pos, EVAL_AVOID_SIDE_EFFECTS); |
245a5f0b KS |
3247 | type = value_type (val); |
3248 | break; | |
c906108c | 3249 | } |
245a5f0b KS |
3250 | |
3251 | /* $5.3.3/2 of the C++ Standard (n3290 draft) says of sizeof: | |
3252 | "When applied to a reference or a reference type, the result is | |
3253 | the size of the referenced type." */ | |
f168693b | 3254 | type = check_typedef (type); |
245a5f0b | 3255 | if (exp->language_defn->la_language == language_cplus |
aa006118 | 3256 | && (TYPE_IS_REFERENCE (type))) |
245a5f0b KS |
3257 | type = check_typedef (TYPE_TARGET_TYPE (type)); |
3258 | return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type)); | |
c906108c SS |
3259 | } |
3260 | ||
46a4882b PA |
3261 | /* Evaluate a subexpression of EXP, at index *POS, and return a value |
3262 | for that subexpression cast to TO_TYPE. Advance *POS over the | |
3263 | subexpression. */ | |
3264 | ||
3265 | static value * | |
3266 | evaluate_subexp_for_cast (expression *exp, int *pos, | |
3267 | enum noside noside, | |
3268 | struct type *to_type) | |
3269 | { | |
3270 | int pc = *pos; | |
3271 | ||
3272 | /* Don't let symbols be evaluated with evaluate_subexp because that | |
3273 | throws an "unknown type" error for no-debug data symbols. | |
3274 | Instead, we want the cast to reinterpret the symbol. */ | |
3275 | if (exp->elts[pc].opcode == OP_VAR_MSYM_VALUE | |
3276 | || exp->elts[pc].opcode == OP_VAR_VALUE) | |
3277 | { | |
3278 | (*pos) += 4; | |
3279 | ||
3280 | value *val; | |
3281 | if (exp->elts[pc].opcode == OP_VAR_MSYM_VALUE) | |
3282 | { | |
3283 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
3284 | return value_zero (to_type, not_lval); | |
3285 | ||
3286 | val = evaluate_var_msym_value (noside, | |
3287 | exp->elts[pc + 1].objfile, | |
3288 | exp->elts[pc + 2].msymbol); | |
3289 | } | |
3290 | else | |
3291 | val = evaluate_var_value (noside, | |
3292 | exp->elts[pc + 1].block, | |
3293 | exp->elts[pc + 2].symbol); | |
3294 | ||
3295 | if (noside == EVAL_SKIP) | |
3296 | return eval_skip_value (exp); | |
3297 | ||
3298 | val = value_cast (to_type, val); | |
3299 | ||
3300 | /* Don't allow e.g. '&(int)var_with_no_debug_info'. */ | |
3301 | if (VALUE_LVAL (val) == lval_memory) | |
3302 | { | |
3303 | if (value_lazy (val)) | |
3304 | value_fetch_lazy (val); | |
3305 | VALUE_LVAL (val) = not_lval; | |
3306 | } | |
3307 | return val; | |
3308 | } | |
3309 | ||
3310 | value *val = evaluate_subexp (to_type, exp, pos, noside); | |
3311 | if (noside == EVAL_SKIP) | |
3312 | return eval_skip_value (exp); | |
3313 | return value_cast (to_type, val); | |
3314 | } | |
3315 | ||
0963b4bd | 3316 | /* Parse a type expression in the string [P..P+LENGTH). */ |
c906108c SS |
3317 | |
3318 | struct type * | |
f5756acc | 3319 | parse_and_eval_type (const char *p, int length) |
c906108c | 3320 | { |
c5aa993b | 3321 | char *tmp = (char *) alloca (length + 4); |
d7f9d729 | 3322 | |
c5aa993b JM |
3323 | tmp[0] = '('; |
3324 | memcpy (tmp + 1, p, length); | |
3325 | tmp[length + 1] = ')'; | |
3326 | tmp[length + 2] = '0'; | |
3327 | tmp[length + 3] = '\0'; | |
4d01a485 | 3328 | expression_up expr = parse_expression (tmp); |
2adab65c | 3329 | if (expr->first_opcode () != UNOP_CAST) |
8a3fe4f8 | 3330 | error (_("Internal error in eval_type.")); |
c5aa993b | 3331 | return expr->elts[1].type; |
c906108c | 3332 | } |