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> | |
e2803273 | 43 | #include "expop.h" |
06dc61b9 | 44 | #include "c-exp.h" |
bc3b79fd | 45 | |
c906108c SS |
46 | \f |
47 | /* Parse the string EXP as a C expression, evaluate it, | |
48 | and return the result as a number. */ | |
49 | ||
50 | CORE_ADDR | |
bbc13ae3 | 51 | parse_and_eval_address (const char *exp) |
c906108c | 52 | { |
4d01a485 PA |
53 | expression_up expr = parse_expression (exp); |
54 | ||
55 | return value_as_address (evaluate_expression (expr.get ())); | |
c906108c SS |
56 | } |
57 | ||
bb518678 | 58 | /* Like parse_and_eval_address, but treats the value of the expression |
0963b4bd | 59 | as an integer, not an address, returns a LONGEST, not a CORE_ADDR. */ |
bb518678 | 60 | LONGEST |
a1b8c4cc | 61 | parse_and_eval_long (const char *exp) |
bb518678 | 62 | { |
4d01a485 PA |
63 | expression_up expr = parse_expression (exp); |
64 | ||
65 | return value_as_long (evaluate_expression (expr.get ())); | |
bb518678 DT |
66 | } |
67 | ||
61051030 | 68 | struct value * |
bbc13ae3 | 69 | parse_and_eval (const char *exp) |
c906108c | 70 | { |
4d01a485 | 71 | expression_up expr = parse_expression (exp); |
c906108c | 72 | |
4d01a485 | 73 | return evaluate_expression (expr.get ()); |
c906108c SS |
74 | } |
75 | ||
76 | /* Parse up to a comma (or to a closeparen) | |
77 | in the string EXPP as an expression, evaluate it, and return the value. | |
78 | EXPP is advanced to point to the comma. */ | |
79 | ||
61051030 | 80 | struct value * |
bbc13ae3 | 81 | parse_to_comma_and_eval (const char **expp) |
c906108c | 82 | { |
582942f4 | 83 | expression_up expr = parse_exp_1 (expp, 0, nullptr, 1); |
c906108c | 84 | |
4d01a485 | 85 | return evaluate_expression (expr.get ()); |
c906108c SS |
86 | } |
87 | \f | |
c906108c | 88 | |
26f53cd3 TT |
89 | /* See expression.h. */ |
90 | ||
91 | struct value * | |
92 | expression::evaluate (struct type *expect_type, enum noside noside) | |
93 | { | |
94 | gdb::optional<enable_thread_stack_temporaries> stack_temporaries; | |
95 | if (target_has_execution () | |
96 | && language_defn->la_language == language_cplus | |
97 | && !thread_stack_temporaries_enabled_p (inferior_thread ())) | |
98 | stack_temporaries.emplace (inferior_thread ()); | |
99 | ||
1eaebe02 | 100 | struct value *retval = op->evaluate (expect_type, this, noside); |
26f53cd3 TT |
101 | |
102 | if (stack_temporaries.has_value () | |
103 | && value_in_thread_stack_temporaries (retval, inferior_thread ())) | |
104 | retval = value_non_lval (retval); | |
105 | ||
106 | return retval; | |
107 | } | |
108 | ||
efd7ff14 | 109 | /* See value.h. */ |
c906108c | 110 | |
61051030 | 111 | struct value * |
efd7ff14 | 112 | evaluate_expression (struct expression *exp, struct type *expect_type) |
c906108c | 113 | { |
26f53cd3 | 114 | return exp->evaluate (expect_type, EVAL_NORMAL); |
c906108c SS |
115 | } |
116 | ||
117 | /* Evaluate an expression, avoiding all memory references | |
118 | and getting a value whose type alone is correct. */ | |
119 | ||
61051030 | 120 | struct value * |
fba45db2 | 121 | evaluate_type (struct expression *exp) |
c906108c | 122 | { |
26f53cd3 | 123 | return exp->evaluate (nullptr, EVAL_AVOID_SIDE_EFFECTS); |
c906108c SS |
124 | } |
125 | ||
0cf6dd15 TJB |
126 | /* Find the current value of a watchpoint on EXP. Return the value in |
127 | *VALP and *RESULTP and the chain of intermediate and final values | |
128 | in *VAL_CHAIN. RESULTP and VAL_CHAIN may be NULL if the caller does | |
129 | not need them. | |
130 | ||
3a1115a0 TT |
131 | If PRESERVE_ERRORS is true, then exceptions are passed through. |
132 | Otherwise, if PRESERVE_ERRORS is false, then if a memory error | |
133 | occurs while evaluating the expression, *RESULTP will be set to | |
134 | NULL. *RESULTP may be a lazy value, if the result could not be | |
135 | read from memory. It is used to determine whether a value is | |
136 | user-specified (we should watch the whole value) or intermediate | |
0cf6dd15 TJB |
137 | (we should watch only the bit used to locate the final value). |
138 | ||
139 | If the final value, or any intermediate value, could not be read | |
140 | from memory, *VALP will be set to NULL. *VAL_CHAIN will still be | |
141 | set to any referenced values. *VALP will never be a lazy value. | |
142 | This is the value which we store in struct breakpoint. | |
143 | ||
a6535de1 TT |
144 | If VAL_CHAIN is non-NULL, the values put into *VAL_CHAIN will be |
145 | released from the value chain. If VAL_CHAIN is NULL, all generated | |
146 | values will be left on the value chain. */ | |
0cf6dd15 TJB |
147 | |
148 | void | |
1eaebe02 | 149 | fetch_subexp_value (struct expression *exp, |
413403fc TT |
150 | expr::operation *op, |
151 | struct value **valp, struct value **resultp, | |
a6535de1 | 152 | std::vector<value_ref_ptr> *val_chain, |
2e362716 | 153 | bool preserve_errors) |
0cf6dd15 TJB |
154 | { |
155 | struct value *mark, *new_mark, *result; | |
0cf6dd15 TJB |
156 | |
157 | *valp = NULL; | |
158 | if (resultp) | |
159 | *resultp = NULL; | |
160 | if (val_chain) | |
a6535de1 | 161 | val_chain->clear (); |
0cf6dd15 TJB |
162 | |
163 | /* Evaluate the expression. */ | |
164 | mark = value_mark (); | |
165 | result = NULL; | |
166 | ||
a70b8144 | 167 | try |
0cf6dd15 | 168 | { |
1eaebe02 | 169 | result = op->evaluate (nullptr, exp, EVAL_NORMAL); |
0cf6dd15 | 170 | } |
230d2906 | 171 | catch (const gdb_exception &ex) |
0cf6dd15 | 172 | { |
3a1115a0 | 173 | /* Ignore memory errors if we want watchpoints pointing at |
0cf6dd15 TJB |
174 | inaccessible memory to still be created; otherwise, throw the |
175 | error to some higher catcher. */ | |
176 | switch (ex.error) | |
177 | { | |
178 | case MEMORY_ERROR: | |
3a1115a0 TT |
179 | if (!preserve_errors) |
180 | break; | |
565e0eda | 181 | /* Fall through. */ |
0cf6dd15 | 182 | default: |
eedc3f4f | 183 | throw; |
0cf6dd15 TJB |
184 | break; |
185 | } | |
186 | } | |
187 | ||
188 | new_mark = value_mark (); | |
189 | if (mark == new_mark) | |
190 | return; | |
191 | if (resultp) | |
192 | *resultp = result; | |
193 | ||
194 | /* Make sure it's not lazy, so that after the target stops again we | |
195 | have a non-lazy previous value to compare with. */ | |
8e7b59a5 KS |
196 | if (result != NULL) |
197 | { | |
198 | if (!value_lazy (result)) | |
199 | *valp = result; | |
200 | else | |
201 | { | |
8e7b59a5 | 202 | |
a70b8144 | 203 | try |
8e7b59a5 KS |
204 | { |
205 | value_fetch_lazy (result); | |
206 | *valp = result; | |
207 | } | |
230d2906 | 208 | catch (const gdb_exception_error &except) |
492d29ea PA |
209 | { |
210 | } | |
8e7b59a5 KS |
211 | } |
212 | } | |
0cf6dd15 TJB |
213 | |
214 | if (val_chain) | |
215 | { | |
216 | /* Return the chain of intermediate values. We use this to | |
217 | decide which addresses to watch. */ | |
a6535de1 | 218 | *val_chain = value_release_to_mark (mark); |
0cf6dd15 TJB |
219 | } |
220 | } | |
221 | ||
4066e646 UW |
222 | /* Promote value ARG1 as appropriate before performing a unary operation |
223 | on this argument. | |
224 | If the result is not appropriate for any particular language then it | |
225 | needs to patch this function. */ | |
226 | ||
227 | void | |
228 | unop_promote (const struct language_defn *language, struct gdbarch *gdbarch, | |
229 | struct value **arg1) | |
230 | { | |
231 | struct type *type1; | |
232 | ||
233 | *arg1 = coerce_ref (*arg1); | |
234 | type1 = check_typedef (value_type (*arg1)); | |
235 | ||
236 | if (is_integral_type (type1)) | |
237 | { | |
238 | switch (language->la_language) | |
239 | { | |
240 | default: | |
241 | /* Perform integral promotion for ANSI C/C++. | |
85102364 | 242 | If not appropriate for any particular language |
4066e646 UW |
243 | it needs to modify this function. */ |
244 | { | |
245 | struct type *builtin_int = builtin_type (gdbarch)->builtin_int; | |
d7f9d729 | 246 | |
4066e646 UW |
247 | if (TYPE_LENGTH (type1) < TYPE_LENGTH (builtin_int)) |
248 | *arg1 = value_cast (builtin_int, *arg1); | |
249 | } | |
250 | break; | |
251 | } | |
252 | } | |
253 | } | |
254 | ||
255 | /* Promote values ARG1 and ARG2 as appropriate before performing a binary | |
256 | operation on those two operands. | |
257 | If the result is not appropriate for any particular language then it | |
258 | needs to patch this function. */ | |
259 | ||
260 | void | |
261 | binop_promote (const struct language_defn *language, struct gdbarch *gdbarch, | |
262 | struct value **arg1, struct value **arg2) | |
263 | { | |
264 | struct type *promoted_type = NULL; | |
265 | struct type *type1; | |
266 | struct type *type2; | |
267 | ||
268 | *arg1 = coerce_ref (*arg1); | |
269 | *arg2 = coerce_ref (*arg2); | |
270 | ||
271 | type1 = check_typedef (value_type (*arg1)); | |
272 | type2 = check_typedef (value_type (*arg2)); | |
273 | ||
78134374 SM |
274 | if ((type1->code () != TYPE_CODE_FLT |
275 | && type1->code () != TYPE_CODE_DECFLOAT | |
4066e646 | 276 | && !is_integral_type (type1)) |
78134374 SM |
277 | || (type2->code () != TYPE_CODE_FLT |
278 | && type2->code () != TYPE_CODE_DECFLOAT | |
4066e646 UW |
279 | && !is_integral_type (type2))) |
280 | return; | |
281 | ||
0a12719e JB |
282 | if (is_fixed_point_type (type1) || is_fixed_point_type (type2)) |
283 | return; | |
284 | ||
78134374 SM |
285 | if (type1->code () == TYPE_CODE_DECFLOAT |
286 | || type2->code () == TYPE_CODE_DECFLOAT) | |
4066e646 UW |
287 | { |
288 | /* No promotion required. */ | |
289 | } | |
78134374 SM |
290 | else if (type1->code () == TYPE_CODE_FLT |
291 | || type2->code () == TYPE_CODE_FLT) | |
4066e646 UW |
292 | { |
293 | switch (language->la_language) | |
294 | { | |
295 | case language_c: | |
296 | case language_cplus: | |
297 | case language_asm: | |
298 | case language_objc: | |
f4b8a18d | 299 | case language_opencl: |
4066e646 UW |
300 | /* No promotion required. */ |
301 | break; | |
302 | ||
303 | default: | |
304 | /* For other languages the result type is unchanged from gdb | |
305 | version 6.7 for backward compatibility. | |
306 | If either arg was long double, make sure that value is also long | |
307 | double. Otherwise use double. */ | |
308 | if (TYPE_LENGTH (type1) * 8 > gdbarch_double_bit (gdbarch) | |
309 | || TYPE_LENGTH (type2) * 8 > gdbarch_double_bit (gdbarch)) | |
310 | promoted_type = builtin_type (gdbarch)->builtin_long_double; | |
311 | else | |
312 | promoted_type = builtin_type (gdbarch)->builtin_double; | |
313 | break; | |
314 | } | |
315 | } | |
78134374 SM |
316 | else if (type1->code () == TYPE_CODE_BOOL |
317 | && type2->code () == TYPE_CODE_BOOL) | |
4066e646 UW |
318 | { |
319 | /* No promotion required. */ | |
320 | } | |
321 | else | |
322 | /* Integral operations here. */ | |
323 | /* FIXME: Also mixed integral/booleans, with result an integer. */ | |
324 | { | |
325 | const struct builtin_type *builtin = builtin_type (gdbarch); | |
326 | unsigned int promoted_len1 = TYPE_LENGTH (type1); | |
327 | unsigned int promoted_len2 = TYPE_LENGTH (type2); | |
c6d940a9 SM |
328 | int is_unsigned1 = type1->is_unsigned (); |
329 | int is_unsigned2 = type2->is_unsigned (); | |
4066e646 UW |
330 | unsigned int result_len; |
331 | int unsigned_operation; | |
332 | ||
333 | /* Determine type length and signedness after promotion for | |
dda83cd7 | 334 | both operands. */ |
4066e646 UW |
335 | if (promoted_len1 < TYPE_LENGTH (builtin->builtin_int)) |
336 | { | |
337 | is_unsigned1 = 0; | |
338 | promoted_len1 = TYPE_LENGTH (builtin->builtin_int); | |
339 | } | |
340 | if (promoted_len2 < TYPE_LENGTH (builtin->builtin_int)) | |
341 | { | |
342 | is_unsigned2 = 0; | |
343 | promoted_len2 = TYPE_LENGTH (builtin->builtin_int); | |
344 | } | |
345 | ||
346 | if (promoted_len1 > promoted_len2) | |
347 | { | |
348 | unsigned_operation = is_unsigned1; | |
349 | result_len = promoted_len1; | |
350 | } | |
351 | else if (promoted_len2 > promoted_len1) | |
352 | { | |
353 | unsigned_operation = is_unsigned2; | |
354 | result_len = promoted_len2; | |
355 | } | |
356 | else | |
357 | { | |
358 | unsigned_operation = is_unsigned1 || is_unsigned2; | |
359 | result_len = promoted_len1; | |
360 | } | |
361 | ||
362 | switch (language->la_language) | |
363 | { | |
364 | case language_c: | |
365 | case language_cplus: | |
366 | case language_asm: | |
367 | case language_objc: | |
368 | if (result_len <= TYPE_LENGTH (builtin->builtin_int)) | |
369 | { | |
370 | promoted_type = (unsigned_operation | |
371 | ? builtin->builtin_unsigned_int | |
372 | : builtin->builtin_int); | |
373 | } | |
374 | else if (result_len <= TYPE_LENGTH (builtin->builtin_long)) | |
375 | { | |
376 | promoted_type = (unsigned_operation | |
377 | ? builtin->builtin_unsigned_long | |
378 | : builtin->builtin_long); | |
379 | } | |
380 | else | |
381 | { | |
382 | promoted_type = (unsigned_operation | |
383 | ? builtin->builtin_unsigned_long_long | |
384 | : builtin->builtin_long_long); | |
385 | } | |
386 | break; | |
f4b8a18d KW |
387 | case language_opencl: |
388 | if (result_len <= TYPE_LENGTH (lookup_signed_typename | |
b858499d | 389 | (language, "int"))) |
f4b8a18d KW |
390 | { |
391 | promoted_type = | |
392 | (unsigned_operation | |
b858499d SM |
393 | ? lookup_unsigned_typename (language, "int") |
394 | : lookup_signed_typename (language, "int")); | |
f4b8a18d KW |
395 | } |
396 | else if (result_len <= TYPE_LENGTH (lookup_signed_typename | |
b858499d | 397 | (language, "long"))) |
f4b8a18d KW |
398 | { |
399 | promoted_type = | |
400 | (unsigned_operation | |
b858499d SM |
401 | ? lookup_unsigned_typename (language, "long") |
402 | : lookup_signed_typename (language,"long")); | |
f4b8a18d KW |
403 | } |
404 | break; | |
4066e646 UW |
405 | default: |
406 | /* For other languages the result type is unchanged from gdb | |
407 | version 6.7 for backward compatibility. | |
408 | If either arg was long long, make sure that value is also long | |
409 | long. Otherwise use long. */ | |
410 | if (unsigned_operation) | |
411 | { | |
412 | if (result_len > gdbarch_long_bit (gdbarch) / HOST_CHAR_BIT) | |
413 | promoted_type = builtin->builtin_unsigned_long_long; | |
414 | else | |
415 | promoted_type = builtin->builtin_unsigned_long; | |
416 | } | |
417 | else | |
418 | { | |
419 | if (result_len > gdbarch_long_bit (gdbarch) / HOST_CHAR_BIT) | |
420 | promoted_type = builtin->builtin_long_long; | |
421 | else | |
422 | promoted_type = builtin->builtin_long; | |
423 | } | |
424 | break; | |
425 | } | |
426 | } | |
427 | ||
428 | if (promoted_type) | |
429 | { | |
430 | /* Promote both operands to common type. */ | |
431 | *arg1 = value_cast (promoted_type, *arg1); | |
432 | *arg2 = value_cast (promoted_type, *arg2); | |
433 | } | |
434 | } | |
435 | ||
89eef114 | 436 | static int |
cc73bb8c | 437 | ptrmath_type_p (const struct language_defn *lang, struct type *type) |
89eef114 UW |
438 | { |
439 | type = check_typedef (type); | |
aa006118 | 440 | if (TYPE_IS_REFERENCE (type)) |
89eef114 UW |
441 | type = TYPE_TARGET_TYPE (type); |
442 | ||
78134374 | 443 | switch (type->code ()) |
89eef114 UW |
444 | { |
445 | case TYPE_CODE_PTR: | |
446 | case TYPE_CODE_FUNC: | |
447 | return 1; | |
448 | ||
449 | case TYPE_CODE_ARRAY: | |
67bd3fd5 | 450 | return type->is_vector () ? 0 : lang->c_style_arrays_p (); |
89eef114 UW |
451 | |
452 | default: | |
453 | return 0; | |
454 | } | |
455 | } | |
456 | ||
c83833f4 PA |
457 | /* Represents a fake method with the given parameter types. This is |
458 | used by the parser to construct a temporary "expected" type for | |
3693fdb3 PA |
459 | method overload resolution. FLAGS is used as instance flags of the |
460 | new type, in order to be able to make the new type represent a | |
461 | const/volatile overload. */ | |
072bba3b | 462 | |
c83833f4 | 463 | class fake_method |
072bba3b | 464 | { |
c83833f4 PA |
465 | public: |
466 | fake_method (type_instance_flags flags, | |
467 | int num_types, struct type **param_types); | |
468 | ~fake_method (); | |
469 | ||
470 | /* The constructed type. */ | |
471 | struct type *type () { return &m_type; } | |
472 | ||
473 | private: | |
474 | struct type m_type {}; | |
475 | main_type m_main_type {}; | |
476 | }; | |
477 | ||
478 | fake_method::fake_method (type_instance_flags flags, | |
479 | int num_types, struct type **param_types) | |
480 | { | |
481 | struct type *type = &m_type; | |
482 | ||
483 | TYPE_MAIN_TYPE (type) = &m_main_type; | |
072bba3b | 484 | TYPE_LENGTH (type) = 1; |
67607e24 | 485 | type->set_code (TYPE_CODE_METHOD); |
072bba3b | 486 | TYPE_CHAIN (type) = type; |
314ad88d | 487 | type->set_instance_flags (flags); |
e314d629 | 488 | if (num_types > 0) |
a6fb9c08 | 489 | { |
e314d629 TT |
490 | if (param_types[num_types - 1] == NULL) |
491 | { | |
492 | --num_types; | |
1d6286ed | 493 | type->set_has_varargs (true); |
e314d629 | 494 | } |
78134374 | 495 | else if (check_typedef (param_types[num_types - 1])->code () |
e314d629 TT |
496 | == TYPE_CODE_VOID) |
497 | { | |
498 | --num_types; | |
499 | /* Caller should have ensured this. */ | |
500 | gdb_assert (num_types == 0); | |
27e69b7a | 501 | type->set_is_prototyped (true); |
e314d629 | 502 | } |
a6fb9c08 | 503 | } |
e314d629 | 504 | |
2fabdf33 AB |
505 | /* We don't use TYPE_ZALLOC here to allocate space as TYPE is owned by |
506 | neither an objfile nor a gdbarch. As a result we must manually | |
507 | allocate memory for auxiliary fields, and free the memory ourselves | |
508 | when we are done with it. */ | |
5e33d5f4 | 509 | type->set_num_fields (num_types); |
3cabb6b0 SM |
510 | type->set_fields |
511 | ((struct field *) xzalloc (sizeof (struct field) * num_types)); | |
072bba3b KS |
512 | |
513 | while (num_types-- > 0) | |
5d14b6e5 | 514 | type->field (num_types).set_type (param_types[num_types]); |
c83833f4 | 515 | } |
072bba3b | 516 | |
c83833f4 PA |
517 | fake_method::~fake_method () |
518 | { | |
80fc5e77 | 519 | xfree (m_type.fields ()); |
072bba3b KS |
520 | } |
521 | ||
44b675c8 TT |
522 | namespace expr |
523 | { | |
524 | ||
525 | value * | |
526 | type_instance_operation::evaluate (struct type *expect_type, | |
527 | struct expression *exp, | |
528 | enum noside noside) | |
529 | { | |
530 | type_instance_flags flags = std::get<0> (m_storage); | |
531 | std::vector<type *> &types = std::get<1> (m_storage); | |
532 | ||
533 | fake_method fake_expect_type (flags, types.size (), types.data ()); | |
534 | return std::get<2> (m_storage)->evaluate (fake_expect_type.type (), | |
535 | exp, noside); | |
536 | } | |
537 | ||
538 | } | |
539 | ||
fe13dfec PA |
540 | /* Helper for evaluating an OP_VAR_VALUE. */ |
541 | ||
ced9779b | 542 | value * |
fe13dfec PA |
543 | evaluate_var_value (enum noside noside, const block *blk, symbol *var) |
544 | { | |
545 | /* JYG: We used to just return value_zero of the symbol type if | |
546 | we're asked to avoid side effects. Otherwise we return | |
547 | value_of_variable (...). However I'm not sure if | |
548 | value_of_variable () has any side effect. We need a full value | |
549 | object returned here for whatis_exp () to call evaluate_type () | |
550 | and then pass the full value to value_rtti_target_type () if we | |
551 | are dealing with a pointer or reference to a base class and print | |
552 | object is on. */ | |
553 | ||
554 | struct value *ret = NULL; | |
555 | ||
a70b8144 | 556 | try |
fe13dfec PA |
557 | { |
558 | ret = value_of_variable (var, blk); | |
559 | } | |
560 | ||
230d2906 | 561 | catch (const gdb_exception_error &except) |
fe13dfec PA |
562 | { |
563 | if (noside != EVAL_AVOID_SIDE_EFFECTS) | |
eedc3f4f | 564 | throw; |
fe13dfec PA |
565 | |
566 | ret = value_zero (SYMBOL_TYPE (var), not_lval); | |
567 | } | |
fe13dfec PA |
568 | |
569 | return ret; | |
570 | } | |
571 | ||
e82a5afc TT |
572 | namespace expr |
573 | ||
574 | { | |
575 | ||
576 | value * | |
577 | var_value_operation::evaluate (struct type *expect_type, | |
578 | struct expression *exp, | |
579 | enum noside noside) | |
580 | { | |
581 | symbol *var = std::get<0> (m_storage); | |
582 | if (SYMBOL_TYPE (var)->code () == TYPE_CODE_ERROR) | |
583 | error_unknown_type (var->print_name ()); | |
584 | return evaluate_var_value (noside, std::get<1> (m_storage), var); | |
585 | } | |
586 | ||
587 | } /* namespace expr */ | |
588 | ||
74ea4be4 PA |
589 | /* Helper for evaluating an OP_VAR_MSYM_VALUE. */ |
590 | ||
ced9779b | 591 | value * |
74ea4be4 PA |
592 | evaluate_var_msym_value (enum noside noside, |
593 | struct objfile *objfile, minimal_symbol *msymbol) | |
594 | { | |
8388016d PA |
595 | CORE_ADDR address; |
596 | type *the_type = find_minsym_type_and_address (msymbol, objfile, &address); | |
597 | ||
0becda7a | 598 | if (noside == EVAL_AVOID_SIDE_EFFECTS && !the_type->is_gnu_ifunc ()) |
8388016d | 599 | return value_zero (the_type, not_lval); |
74ea4be4 | 600 | else |
8388016d | 601 | return value_at_lazy (the_type, address); |
74ea4be4 PA |
602 | } |
603 | ||
827d0c51 PA |
604 | /* Helper for returning a value when handling EVAL_SKIP. */ |
605 | ||
ced9779b | 606 | value * |
827d0c51 PA |
607 | eval_skip_value (expression *exp) |
608 | { | |
609 | return value_from_longest (builtin_type (exp->gdbarch)->builtin_int, 1); | |
610 | } | |
611 | ||
6d816919 | 612 | /* See expression.h. */ |
e69570ee | 613 | |
6d816919 AB |
614 | value * |
615 | evaluate_subexp_do_call (expression *exp, enum noside noside, | |
1ab8280d TT |
616 | value *callee, |
617 | gdb::array_view<value *> argvec, | |
6d816919 AB |
618 | const char *function_name, |
619 | type *default_return_type) | |
e69570ee | 620 | { |
1ab8280d | 621 | if (callee == NULL) |
e69570ee PA |
622 | error (_("Cannot evaluate function -- may be inlined")); |
623 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
624 | { | |
625 | /* If the return type doesn't look like a function type, | |
626 | call an error. This can happen if somebody tries to turn | |
627 | a variable into a function call. */ | |
628 | ||
1ab8280d | 629 | type *ftype = value_type (callee); |
e69570ee | 630 | |
78134374 | 631 | if (ftype->code () == TYPE_CODE_INTERNAL_FUNCTION) |
e69570ee PA |
632 | { |
633 | /* We don't know anything about what the internal | |
634 | function might return, but we have to return | |
635 | something. */ | |
636 | return value_zero (builtin_type (exp->gdbarch)->builtin_int, | |
637 | not_lval); | |
638 | } | |
78134374 | 639 | else if (ftype->code () == TYPE_CODE_XMETHOD) |
e69570ee | 640 | { |
1ab8280d | 641 | type *return_type = result_type_of_xmethod (callee, argvec); |
e69570ee PA |
642 | |
643 | if (return_type == NULL) | |
644 | error (_("Xmethod is missing return type.")); | |
645 | return value_zero (return_type, not_lval); | |
646 | } | |
78134374 SM |
647 | else if (ftype->code () == TYPE_CODE_FUNC |
648 | || ftype->code () == TYPE_CODE_METHOD) | |
e69570ee | 649 | { |
0becda7a | 650 | if (ftype->is_gnu_ifunc ()) |
8388016d | 651 | { |
1ab8280d | 652 | CORE_ADDR address = value_address (callee); |
8388016d PA |
653 | type *resolved_type = find_gnu_ifunc_target_type (address); |
654 | ||
655 | if (resolved_type != NULL) | |
656 | ftype = resolved_type; | |
657 | } | |
658 | ||
e69570ee PA |
659 | type *return_type = TYPE_TARGET_TYPE (ftype); |
660 | ||
661 | if (return_type == NULL) | |
662 | return_type = default_return_type; | |
663 | ||
664 | if (return_type == NULL) | |
665 | error_call_unknown_return_type (function_name); | |
666 | ||
667 | return allocate_value (return_type); | |
668 | } | |
669 | else | |
670 | error (_("Expression of type other than " | |
671 | "\"Function returning ...\" used as function")); | |
672 | } | |
1ab8280d | 673 | switch (value_type (callee)->code ()) |
e69570ee PA |
674 | { |
675 | case TYPE_CODE_INTERNAL_FUNCTION: | |
676 | return call_internal_function (exp->gdbarch, exp->language_defn, | |
1ab8280d | 677 | callee, argvec.size (), argvec.data ()); |
e69570ee | 678 | case TYPE_CODE_XMETHOD: |
1ab8280d | 679 | return call_xmethod (callee, argvec); |
e69570ee | 680 | default: |
1ab8280d | 681 | return call_function_by_hand (callee, default_return_type, argvec); |
e69570ee PA |
682 | } |
683 | } | |
684 | ||
a00b7254 TT |
685 | namespace expr |
686 | { | |
687 | ||
688 | value * | |
689 | operation::evaluate_funcall (struct type *expect_type, | |
690 | struct expression *exp, | |
691 | enum noside noside, | |
692 | const char *function_name, | |
693 | const std::vector<operation_up> &args) | |
694 | { | |
695 | std::vector<value *> vals (args.size ()); | |
696 | ||
697 | value *callee = evaluate_with_coercion (exp, noside); | |
698 | for (int i = 0; i < args.size (); ++i) | |
699 | vals[i] = args[i]->evaluate_with_coercion (exp, noside); | |
700 | ||
701 | return evaluate_subexp_do_call (exp, noside, callee, vals, | |
702 | function_name, expect_type); | |
703 | } | |
704 | ||
705 | value * | |
706 | var_value_operation::evaluate_funcall (struct type *expect_type, | |
707 | struct expression *exp, | |
708 | enum noside noside, | |
709 | const std::vector<operation_up> &args) | |
710 | { | |
711 | if (!overload_resolution | |
712 | || exp->language_defn->la_language != language_cplus) | |
713 | return operation::evaluate_funcall (expect_type, exp, noside, args); | |
714 | ||
715 | std::vector<value *> argvec (args.size ()); | |
716 | for (int i = 0; i < args.size (); ++i) | |
717 | argvec[i] = args[i]->evaluate_with_coercion (exp, noside); | |
718 | ||
719 | struct symbol *symp; | |
720 | find_overload_match (argvec, NULL, NON_METHOD, | |
721 | NULL, std::get<0> (m_storage), | |
722 | NULL, &symp, NULL, 0, noside); | |
723 | ||
724 | if (SYMBOL_TYPE (symp)->code () == TYPE_CODE_ERROR) | |
725 | error_unknown_type (symp->print_name ()); | |
726 | value *callee = evaluate_var_value (noside, std::get<1> (m_storage), symp); | |
727 | ||
728 | return evaluate_subexp_do_call (exp, noside, callee, argvec, | |
729 | nullptr, expect_type); | |
730 | } | |
731 | ||
732 | value * | |
733 | scope_operation::evaluate_funcall (struct type *expect_type, | |
734 | struct expression *exp, | |
735 | enum noside noside, | |
736 | const std::vector<operation_up> &args) | |
737 | { | |
738 | if (!overload_resolution | |
739 | || exp->language_defn->la_language != language_cplus) | |
740 | return operation::evaluate_funcall (expect_type, exp, noside, args); | |
741 | ||
742 | /* Unpack it locally so we can properly handle overload | |
743 | resolution. */ | |
744 | const std::string &name = std::get<1> (m_storage); | |
745 | struct type *type = std::get<0> (m_storage); | |
746 | ||
747 | symbol *function = NULL; | |
748 | const char *function_name = NULL; | |
749 | std::vector<value *> argvec (1 + args.size ()); | |
750 | if (type->code () == TYPE_CODE_NAMESPACE) | |
751 | { | |
752 | function = cp_lookup_symbol_namespace (type->name (), | |
753 | name.c_str (), | |
754 | get_selected_block (0), | |
755 | VAR_DOMAIN).symbol; | |
756 | if (function == NULL) | |
757 | error (_("No symbol \"%s\" in namespace \"%s\"."), | |
758 | name.c_str (), type->name ()); | |
759 | } | |
760 | else | |
761 | { | |
762 | gdb_assert (type->code () == TYPE_CODE_STRUCT | |
763 | || type->code () == TYPE_CODE_UNION); | |
764 | function_name = name.c_str (); | |
765 | ||
766 | /* We need a properly typed value for method lookup. */ | |
767 | argvec[0] = value_zero (type, lval_memory); | |
768 | } | |
769 | ||
770 | for (int i = 0; i < args.size (); ++i) | |
771 | argvec[i + 1] = args[i]->evaluate_with_coercion (exp, noside); | |
772 | gdb::array_view<value *> arg_view = argvec; | |
773 | ||
774 | value *callee = nullptr; | |
775 | if (function_name != nullptr) | |
776 | { | |
777 | int static_memfuncp; | |
778 | ||
779 | find_overload_match (arg_view, function_name, METHOD, | |
780 | &argvec[0], nullptr, &callee, nullptr, | |
781 | &static_memfuncp, 0, noside); | |
782 | if (!static_memfuncp) | |
783 | { | |
784 | /* For the time being, we don't handle this. */ | |
785 | error (_("Call to overloaded function %s requires " | |
786 | "`this' pointer"), | |
787 | function_name); | |
788 | } | |
789 | ||
790 | arg_view = arg_view.slice (1); | |
791 | } | |
792 | else | |
793 | { | |
794 | symbol *symp; | |
795 | arg_view = arg_view.slice (1); | |
796 | find_overload_match (arg_view, nullptr, | |
797 | NON_METHOD, nullptr, function, | |
798 | nullptr, &symp, nullptr, 1, noside); | |
799 | callee = value_of_variable (symp, get_selected_block (0)); | |
800 | } | |
801 | ||
802 | return evaluate_subexp_do_call (exp, noside, callee, arg_view, | |
803 | nullptr, expect_type); | |
804 | } | |
805 | ||
806 | value * | |
807 | structop_member_base::evaluate_funcall (struct type *expect_type, | |
808 | struct expression *exp, | |
809 | enum noside noside, | |
810 | const std::vector<operation_up> &args) | |
811 | { | |
812 | /* First, evaluate the structure into lhs. */ | |
813 | value *lhs; | |
814 | if (opcode () == STRUCTOP_MEMBER) | |
815 | lhs = std::get<0> (m_storage)->evaluate_for_address (exp, noside); | |
816 | else | |
817 | lhs = std::get<0> (m_storage)->evaluate (nullptr, exp, noside); | |
818 | ||
819 | std::vector<value *> vals (args.size () + 1); | |
820 | gdb::array_view<value *> val_view = vals; | |
821 | /* If the function is a virtual function, then the aggregate | |
822 | value (providing the structure) plays its part by providing | |
823 | the vtable. Otherwise, it is just along for the ride: call | |
824 | the function directly. */ | |
825 | value *rhs = std::get<1> (m_storage)->evaluate (nullptr, exp, noside); | |
826 | value *callee; | |
827 | ||
828 | type *a1_type = check_typedef (value_type (rhs)); | |
829 | if (a1_type->code () == TYPE_CODE_METHODPTR) | |
830 | { | |
831 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
832 | callee = value_zero (TYPE_TARGET_TYPE (a1_type), not_lval); | |
833 | else | |
834 | callee = cplus_method_ptr_to_value (&lhs, rhs); | |
835 | ||
836 | vals[0] = lhs; | |
837 | } | |
838 | else if (a1_type->code () == TYPE_CODE_MEMBERPTR) | |
839 | { | |
840 | struct type *type_ptr | |
841 | = lookup_pointer_type (TYPE_SELF_TYPE (a1_type)); | |
842 | struct type *target_type_ptr | |
843 | = lookup_pointer_type (TYPE_TARGET_TYPE (a1_type)); | |
844 | ||
845 | /* Now, convert this value to an address. */ | |
846 | lhs = value_cast (type_ptr, lhs); | |
847 | ||
848 | long mem_offset = value_as_long (rhs); | |
849 | ||
850 | callee = value_from_pointer (target_type_ptr, | |
851 | value_as_long (lhs) + mem_offset); | |
852 | callee = value_ind (callee); | |
853 | ||
854 | val_view = val_view.slice (1); | |
855 | } | |
856 | else | |
857 | error (_("Non-pointer-to-member value used in pointer-to-member " | |
858 | "construct")); | |
859 | ||
860 | for (int i = 0; i < args.size (); ++i) | |
861 | vals[i + 1] = args[i]->evaluate_with_coercion (exp, noside); | |
862 | ||
863 | return evaluate_subexp_do_call (exp, noside, callee, val_view, | |
864 | nullptr, expect_type); | |
865 | ||
866 | } | |
867 | ||
868 | value * | |
869 | structop_base_operation::evaluate_funcall | |
870 | (struct type *expect_type, struct expression *exp, enum noside noside, | |
871 | const std::vector<operation_up> &args) | |
872 | { | |
873 | std::vector<value *> vals (args.size () + 1); | |
874 | /* First, evaluate the structure into vals[0]. */ | |
875 | enum exp_opcode op = opcode (); | |
876 | if (op == STRUCTOP_STRUCT) | |
877 | { | |
878 | /* If v is a variable in a register, and the user types | |
879 | v.method (), this will produce an error, because v has no | |
880 | address. | |
881 | ||
882 | A possible way around this would be to allocate a copy of | |
883 | the variable on the stack, copy in the contents, call the | |
884 | function, and copy out the contents. I.e. convert this | |
885 | from call by reference to call by copy-return (or | |
886 | whatever it's called). However, this does not work | |
887 | because it is not the same: the method being called could | |
888 | stash a copy of the address, and then future uses through | |
889 | that address (after the method returns) would be expected | |
890 | to use the variable itself, not some copy of it. */ | |
891 | vals[0] = std::get<0> (m_storage)->evaluate_for_address (exp, noside); | |
892 | } | |
893 | else | |
894 | { | |
895 | vals[0] = std::get<0> (m_storage)->evaluate (nullptr, exp, noside); | |
896 | /* Check to see if the operator '->' has been overloaded. | |
897 | If the operator has been overloaded replace vals[0] with the | |
898 | value returned by the custom operator and continue | |
899 | evaluation. */ | |
900 | while (unop_user_defined_p (op, vals[0])) | |
901 | { | |
902 | struct value *value = nullptr; | |
903 | try | |
904 | { | |
905 | value = value_x_unop (vals[0], op, noside); | |
906 | } | |
907 | catch (const gdb_exception_error &except) | |
908 | { | |
909 | if (except.error == NOT_FOUND_ERROR) | |
910 | break; | |
911 | else | |
912 | throw; | |
913 | } | |
914 | ||
915 | vals[0] = value; | |
916 | } | |
917 | } | |
918 | ||
919 | for (int i = 0; i < args.size (); ++i) | |
920 | vals[i + 1] = args[i]->evaluate_with_coercion (exp, noside); | |
921 | gdb::array_view<value *> arg_view = vals; | |
922 | ||
923 | int static_memfuncp; | |
924 | value *callee; | |
925 | const char *tstr = std::get<1> (m_storage).c_str (); | |
926 | if (overload_resolution | |
927 | && exp->language_defn->la_language == language_cplus) | |
928 | { | |
929 | /* Language is C++, do some overload resolution before | |
930 | evaluation. */ | |
931 | value *val0 = vals[0]; | |
932 | find_overload_match (arg_view, tstr, METHOD, | |
933 | &val0, nullptr, &callee, nullptr, | |
934 | &static_memfuncp, 0, noside); | |
935 | vals[0] = val0; | |
936 | } | |
937 | else | |
938 | /* Non-C++ case -- or no overload resolution. */ | |
939 | { | |
940 | struct value *temp = vals[0]; | |
941 | ||
942 | callee = value_struct_elt (&temp, &vals[1], tstr, | |
943 | &static_memfuncp, | |
944 | op == STRUCTOP_STRUCT | |
945 | ? "structure" : "structure pointer"); | |
946 | /* value_struct_elt updates temp with the correct value of the | |
947 | ``this'' pointer if necessary, so modify it to reflect any | |
948 | ``this'' changes. */ | |
949 | vals[0] = value_from_longest (lookup_pointer_type (value_type (temp)), | |
950 | value_address (temp) | |
951 | + value_embedded_offset (temp)); | |
952 | } | |
953 | ||
954 | /* Take out `this' if needed. */ | |
955 | if (static_memfuncp) | |
956 | arg_view = arg_view.slice (1); | |
957 | ||
958 | return evaluate_subexp_do_call (exp, noside, callee, arg_view, | |
959 | nullptr, expect_type); | |
960 | } | |
961 | ||
962 | ||
963 | } /* namespace expr */ | |
964 | ||
60e22c1e HD |
965 | /* Return true if type is integral or reference to integral */ |
966 | ||
967 | static bool | |
968 | is_integral_or_integral_reference (struct type *type) | |
969 | { | |
970 | if (is_integral_type (type)) | |
971 | return true; | |
972 | ||
973 | type = check_typedef (type); | |
974 | return (type != nullptr | |
975 | && TYPE_IS_REFERENCE (type) | |
976 | && is_integral_type (TYPE_TARGET_TYPE (type))); | |
977 | } | |
978 | ||
ea2d29f7 TT |
979 | /* Helper function that implements the body of OP_SCOPE. */ |
980 | ||
d5ab122c | 981 | struct value * |
ea2d29f7 TT |
982 | eval_op_scope (struct type *expect_type, struct expression *exp, |
983 | enum noside noside, | |
984 | struct type *type, const char *string) | |
985 | { | |
986 | if (noside == EVAL_SKIP) | |
987 | return eval_skip_value (exp); | |
988 | struct value *arg1 = value_aggregate_elt (type, string, expect_type, | |
989 | 0, noside); | |
990 | if (arg1 == NULL) | |
991 | error (_("There is no field named %s"), string); | |
992 | return arg1; | |
993 | } | |
994 | ||
50b98adc TT |
995 | /* Helper function that implements the body of OP_VAR_ENTRY_VALUE. */ |
996 | ||
b5cc3923 | 997 | struct value * |
50b98adc TT |
998 | eval_op_var_entry_value (struct type *expect_type, struct expression *exp, |
999 | enum noside noside, symbol *sym) | |
1000 | { | |
1001 | if (noside == EVAL_SKIP) | |
1002 | return eval_skip_value (exp); | |
1003 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1004 | return value_zero (SYMBOL_TYPE (sym), not_lval); | |
1005 | ||
1006 | if (SYMBOL_COMPUTED_OPS (sym) == NULL | |
1007 | || SYMBOL_COMPUTED_OPS (sym)->read_variable_at_entry == NULL) | |
1008 | error (_("Symbol \"%s\" does not have any specific entry value"), | |
1009 | sym->print_name ()); | |
1010 | ||
1011 | struct frame_info *frame = get_selected_frame (NULL); | |
1012 | return SYMBOL_COMPUTED_OPS (sym)->read_variable_at_entry (sym, frame); | |
1013 | } | |
1014 | ||
c0df9289 TT |
1015 | /* Helper function that implements the body of OP_VAR_MSYM_VALUE. */ |
1016 | ||
0c8effa3 | 1017 | struct value * |
c0df9289 TT |
1018 | eval_op_var_msym_value (struct type *expect_type, struct expression *exp, |
1019 | enum noside noside, bool outermost_p, | |
1020 | minimal_symbol *msymbol, struct objfile *objfile) | |
1021 | { | |
1022 | value *val = evaluate_var_msym_value (noside, objfile, msymbol); | |
1023 | ||
1024 | struct type *type = value_type (val); | |
1025 | if (type->code () == TYPE_CODE_ERROR | |
1026 | && (noside != EVAL_AVOID_SIDE_EFFECTS || !outermost_p)) | |
1027 | error_unknown_type (msymbol->print_name ()); | |
1028 | return val; | |
1029 | } | |
1030 | ||
9b1d8af6 TT |
1031 | /* Helper function that implements the body of OP_FUNC_STATIC_VAR. */ |
1032 | ||
17679395 | 1033 | struct value * |
9b1d8af6 TT |
1034 | eval_op_func_static_var (struct type *expect_type, struct expression *exp, |
1035 | enum noside noside, | |
1036 | value *func, const char *var) | |
1037 | { | |
1038 | if (noside == EVAL_SKIP) | |
1039 | return eval_skip_value (exp); | |
1040 | CORE_ADDR addr = value_address (func); | |
1041 | const block *blk = block_for_pc (addr); | |
1042 | struct block_symbol sym = lookup_symbol (var, blk, VAR_DOMAIN, NULL); | |
1043 | if (sym.symbol == NULL) | |
1044 | error (_("No symbol \"%s\" in specified context."), var); | |
1045 | return evaluate_var_value (noside, sym.block, sym.symbol); | |
1046 | } | |
1047 | ||
ffff730b TT |
1048 | /* Helper function that implements the body of OP_REGISTER. */ |
1049 | ||
55bdbff8 | 1050 | struct value * |
ffff730b TT |
1051 | eval_op_register (struct type *expect_type, struct expression *exp, |
1052 | enum noside noside, const char *name) | |
1053 | { | |
1054 | int regno; | |
1055 | struct value *val; | |
1056 | ||
1057 | regno = user_reg_map_name_to_regnum (exp->gdbarch, | |
1058 | name, strlen (name)); | |
1059 | if (regno == -1) | |
1060 | error (_("Register $%s not available."), name); | |
1061 | ||
1062 | /* In EVAL_AVOID_SIDE_EFFECTS mode, we only need to return | |
1063 | a value with the appropriate register type. Unfortunately, | |
1064 | we don't have easy access to the type of user registers. | |
1065 | So for these registers, we fetch the register value regardless | |
1066 | of the evaluation mode. */ | |
1067 | if (noside == EVAL_AVOID_SIDE_EFFECTS | |
1068 | && regno < gdbarch_num_cooked_regs (exp->gdbarch)) | |
1069 | val = value_zero (register_type (exp->gdbarch, regno), not_lval); | |
1070 | else | |
1071 | val = value_of_register (regno, get_selected_frame (NULL)); | |
1072 | if (val == NULL) | |
1073 | error (_("Value of register %s not available."), name); | |
1074 | else | |
1075 | return val; | |
1076 | } | |
1077 | ||
14a1c64a TT |
1078 | /* Helper function that implements the body of OP_STRING. */ |
1079 | ||
b50db09f | 1080 | struct value * |
14a1c64a TT |
1081 | eval_op_string (struct type *expect_type, struct expression *exp, |
1082 | enum noside noside, int len, const char *string) | |
1083 | { | |
1084 | if (noside == EVAL_SKIP) | |
1085 | return eval_skip_value (exp); | |
1086 | struct type *type = language_string_char_type (exp->language_defn, | |
1087 | exp->gdbarch); | |
1088 | return value_string (string, len, type); | |
1089 | } | |
1090 | ||
f871bae1 TT |
1091 | /* Helper function that implements the body of OP_OBJC_SELECTOR. */ |
1092 | ||
09db3700 | 1093 | struct value * |
f871bae1 TT |
1094 | eval_op_objc_selector (struct type *expect_type, struct expression *exp, |
1095 | enum noside noside, | |
1096 | const char *sel) | |
1097 | { | |
1098 | if (noside == EVAL_SKIP) | |
1099 | return eval_skip_value (exp); | |
1100 | ||
1101 | struct type *selector_type = builtin_type (exp->gdbarch)->builtin_data_ptr; | |
1102 | return value_from_longest (selector_type, | |
1103 | lookup_child_selector (exp->gdbarch, sel)); | |
1104 | } | |
1105 | ||
5c2f201e TT |
1106 | /* Helper function that implements the body of BINOP_CONCAT. */ |
1107 | ||
e51e26a0 | 1108 | struct value * |
5c2f201e | 1109 | eval_op_concat (struct type *expect_type, struct expression *exp, |
e51e26a0 | 1110 | enum noside noside, struct value *arg1, struct value *arg2) |
5c2f201e TT |
1111 | { |
1112 | if (noside == EVAL_SKIP) | |
1113 | return eval_skip_value (exp); | |
e51e26a0 TT |
1114 | if (binop_user_defined_p (BINOP_CONCAT, arg1, arg2)) |
1115 | return value_x_binop (arg1, arg2, BINOP_CONCAT, OP_NULL, noside); | |
5c2f201e TT |
1116 | else |
1117 | return value_concat (arg1, arg2); | |
1118 | } | |
1119 | ||
f960a617 TT |
1120 | /* A helper function for TERNOP_SLICE. */ |
1121 | ||
1594e0bb | 1122 | struct value * |
f960a617 TT |
1123 | eval_op_ternop (struct type *expect_type, struct expression *exp, |
1124 | enum noside noside, | |
1125 | struct value *array, struct value *low, struct value *upper) | |
1126 | { | |
1127 | if (noside == EVAL_SKIP) | |
1128 | return eval_skip_value (exp); | |
1129 | int lowbound = value_as_long (low); | |
1130 | int upperbound = value_as_long (upper); | |
1131 | return value_slice (array, lowbound, upperbound - lowbound + 1); | |
1132 | } | |
1133 | ||
3e96c4fc TT |
1134 | /* A helper function for STRUCTOP_STRUCT. */ |
1135 | ||
808b22cf | 1136 | struct value * |
3e96c4fc TT |
1137 | eval_op_structop_struct (struct type *expect_type, struct expression *exp, |
1138 | enum noside noside, | |
1139 | struct value *arg1, const char *string) | |
1140 | { | |
1141 | if (noside == EVAL_SKIP) | |
1142 | return eval_skip_value (exp); | |
1143 | struct value *arg3 = value_struct_elt (&arg1, NULL, string, | |
1144 | NULL, "structure"); | |
1145 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1146 | arg3 = value_zero (value_type (arg3), VALUE_LVAL (arg3)); | |
1147 | return arg3; | |
1148 | } | |
1149 | ||
fb461aa3 TT |
1150 | /* A helper function for STRUCTOP_PTR. */ |
1151 | ||
ab0609be | 1152 | struct value * |
fb461aa3 | 1153 | eval_op_structop_ptr (struct type *expect_type, struct expression *exp, |
ab0609be | 1154 | enum noside noside, |
fb461aa3 TT |
1155 | struct value *arg1, const char *string) |
1156 | { | |
1157 | if (noside == EVAL_SKIP) | |
1158 | return eval_skip_value (exp); | |
1159 | ||
1160 | /* Check to see if operator '->' has been overloaded. If so replace | |
1161 | arg1 with the value returned by evaluating operator->(). */ | |
ab0609be | 1162 | while (unop_user_defined_p (STRUCTOP_PTR, arg1)) |
fb461aa3 TT |
1163 | { |
1164 | struct value *value = NULL; | |
1165 | try | |
1166 | { | |
ab0609be | 1167 | value = value_x_unop (arg1, STRUCTOP_PTR, noside); |
fb461aa3 TT |
1168 | } |
1169 | ||
1170 | catch (const gdb_exception_error &except) | |
1171 | { | |
1172 | if (except.error == NOT_FOUND_ERROR) | |
1173 | break; | |
1174 | else | |
1175 | throw; | |
1176 | } | |
1177 | ||
1178 | arg1 = value; | |
1179 | } | |
1180 | ||
1181 | /* JYG: if print object is on we need to replace the base type | |
1182 | with rtti type in order to continue on with successful | |
1183 | lookup of member / method only available in the rtti type. */ | |
1184 | { | |
1185 | struct type *arg_type = value_type (arg1); | |
1186 | struct type *real_type; | |
1187 | int full, using_enc; | |
1188 | LONGEST top; | |
1189 | struct value_print_options opts; | |
1190 | ||
1191 | get_user_print_options (&opts); | |
1192 | if (opts.objectprint && TYPE_TARGET_TYPE (arg_type) | |
1193 | && (TYPE_TARGET_TYPE (arg_type)->code () == TYPE_CODE_STRUCT)) | |
1194 | { | |
1195 | real_type = value_rtti_indirect_type (arg1, &full, &top, | |
1196 | &using_enc); | |
1197 | if (real_type) | |
1198 | arg1 = value_cast (real_type, arg1); | |
1199 | } | |
1200 | } | |
1201 | ||
1202 | struct value *arg3 = value_struct_elt (&arg1, NULL, string, | |
1203 | NULL, "structure pointer"); | |
1204 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1205 | arg3 = value_zero (value_type (arg3), VALUE_LVAL (arg3)); | |
1206 | return arg3; | |
1207 | } | |
1208 | ||
b7a96ed2 TT |
1209 | /* A helper function for STRUCTOP_MEMBER. */ |
1210 | ||
07f724a8 | 1211 | struct value * |
b7a96ed2 TT |
1212 | eval_op_member (struct type *expect_type, struct expression *exp, |
1213 | enum noside noside, | |
1214 | struct value *arg1, struct value *arg2) | |
1215 | { | |
1216 | long mem_offset; | |
1217 | ||
1218 | if (noside == EVAL_SKIP) | |
1219 | return eval_skip_value (exp); | |
1220 | ||
1221 | struct value *arg3; | |
1222 | struct type *type = check_typedef (value_type (arg2)); | |
1223 | switch (type->code ()) | |
1224 | { | |
1225 | case TYPE_CODE_METHODPTR: | |
1226 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1227 | return value_zero (TYPE_TARGET_TYPE (type), not_lval); | |
1228 | else | |
1229 | { | |
1230 | arg2 = cplus_method_ptr_to_value (&arg1, arg2); | |
1231 | gdb_assert (value_type (arg2)->code () == TYPE_CODE_PTR); | |
1232 | return value_ind (arg2); | |
1233 | } | |
1234 | ||
1235 | case TYPE_CODE_MEMBERPTR: | |
1236 | /* Now, convert these values to an address. */ | |
1237 | arg1 = value_cast_pointers (lookup_pointer_type (TYPE_SELF_TYPE (type)), | |
1238 | arg1, 1); | |
1239 | ||
1240 | mem_offset = value_as_long (arg2); | |
1241 | ||
1242 | arg3 = value_from_pointer (lookup_pointer_type (TYPE_TARGET_TYPE (type)), | |
1243 | value_as_long (arg1) + mem_offset); | |
1244 | return value_ind (arg3); | |
1245 | ||
1246 | default: | |
1247 | error (_("non-pointer-to-member value used " | |
1248 | "in pointer-to-member construct")); | |
1249 | } | |
1250 | } | |
1251 | ||
aedaf9ac TT |
1252 | /* A helper function for BINOP_ADD. */ |
1253 | ||
a94323b6 | 1254 | struct value * |
aedaf9ac | 1255 | eval_op_add (struct type *expect_type, struct expression *exp, |
a94323b6 | 1256 | enum noside noside, |
aedaf9ac TT |
1257 | struct value *arg1, struct value *arg2) |
1258 | { | |
1259 | if (noside == EVAL_SKIP) | |
1260 | return eval_skip_value (exp); | |
a94323b6 TT |
1261 | if (binop_user_defined_p (BINOP_ADD, arg1, arg2)) |
1262 | return value_x_binop (arg1, arg2, BINOP_ADD, OP_NULL, noside); | |
aedaf9ac TT |
1263 | else if (ptrmath_type_p (exp->language_defn, value_type (arg1)) |
1264 | && is_integral_or_integral_reference (value_type (arg2))) | |
1265 | return value_ptradd (arg1, value_as_long (arg2)); | |
1266 | else if (ptrmath_type_p (exp->language_defn, value_type (arg2)) | |
1267 | && is_integral_or_integral_reference (value_type (arg1))) | |
1268 | return value_ptradd (arg2, value_as_long (arg1)); | |
1269 | else | |
1270 | { | |
1271 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
1272 | return value_binop (arg1, arg2, BINOP_ADD); | |
1273 | } | |
1274 | } | |
1275 | ||
d9790e22 TT |
1276 | /* A helper function for BINOP_SUB. */ |
1277 | ||
5133d78b | 1278 | struct value * |
d9790e22 | 1279 | eval_op_sub (struct type *expect_type, struct expression *exp, |
5133d78b | 1280 | enum noside noside, |
d9790e22 TT |
1281 | struct value *arg1, struct value *arg2) |
1282 | { | |
1283 | if (noside == EVAL_SKIP) | |
1284 | return eval_skip_value (exp); | |
5133d78b TT |
1285 | if (binop_user_defined_p (BINOP_SUB, arg1, arg2)) |
1286 | return value_x_binop (arg1, arg2, BINOP_SUB, OP_NULL, noside); | |
d9790e22 TT |
1287 | else if (ptrmath_type_p (exp->language_defn, value_type (arg1)) |
1288 | && ptrmath_type_p (exp->language_defn, value_type (arg2))) | |
1289 | { | |
1290 | /* FIXME -- should be ptrdiff_t */ | |
1291 | struct type *type = builtin_type (exp->gdbarch)->builtin_long; | |
1292 | return value_from_longest (type, value_ptrdiff (arg1, arg2)); | |
1293 | } | |
1294 | else if (ptrmath_type_p (exp->language_defn, value_type (arg1)) | |
1295 | && is_integral_or_integral_reference (value_type (arg2))) | |
1296 | return value_ptradd (arg1, - value_as_long (arg2)); | |
1297 | else | |
1298 | { | |
1299 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
1300 | return value_binop (arg1, arg2, BINOP_SUB); | |
1301 | } | |
1302 | } | |
1303 | ||
7cdcdd02 TT |
1304 | /* Helper function for several different binary operations. */ |
1305 | ||
373907ff | 1306 | struct value * |
7cdcdd02 TT |
1307 | eval_op_binary (struct type *expect_type, struct expression *exp, |
1308 | enum noside noside, enum exp_opcode op, | |
1309 | struct value *arg1, struct value *arg2) | |
1310 | { | |
1311 | if (noside == EVAL_SKIP) | |
1312 | return eval_skip_value (exp); | |
1313 | if (binop_user_defined_p (op, arg1, arg2)) | |
1314 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); | |
1315 | else | |
1316 | { | |
1317 | /* If EVAL_AVOID_SIDE_EFFECTS and we're dividing by zero, | |
1318 | fudge arg2 to avoid division-by-zero, the caller is | |
1319 | (theoretically) only looking for the type of the result. */ | |
1320 | if (noside == EVAL_AVOID_SIDE_EFFECTS | |
1321 | /* ??? Do we really want to test for BINOP_MOD here? | |
1322 | The implementation of value_binop gives it a well-defined | |
1323 | value. */ | |
1324 | && (op == BINOP_DIV | |
1325 | || op == BINOP_INTDIV | |
1326 | || op == BINOP_REM | |
1327 | || op == BINOP_MOD) | |
1328 | && value_logical_not (arg2)) | |
1329 | { | |
1330 | struct value *v_one; | |
1331 | ||
1332 | v_one = value_one (value_type (arg2)); | |
1333 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &v_one); | |
1334 | return value_binop (arg1, v_one, op); | |
1335 | } | |
1336 | else | |
1337 | { | |
1338 | /* For shift and integer exponentiation operations, | |
1339 | only promote the first argument. */ | |
1340 | if ((op == BINOP_LSH || op == BINOP_RSH || op == BINOP_EXP) | |
1341 | && is_integral_type (value_type (arg2))) | |
1342 | unop_promote (exp->language_defn, exp->gdbarch, &arg1); | |
1343 | else | |
1344 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
1345 | ||
1346 | return value_binop (arg1, arg2, op); | |
1347 | } | |
1348 | } | |
1349 | } | |
1350 | ||
288d26bc TT |
1351 | /* A helper function for BINOP_SUBSCRIPT. */ |
1352 | ||
224d6424 | 1353 | struct value * |
288d26bc TT |
1354 | eval_op_subscript (struct type *expect_type, struct expression *exp, |
1355 | enum noside noside, enum exp_opcode op, | |
1356 | struct value *arg1, struct value *arg2) | |
1357 | { | |
1358 | if (noside == EVAL_SKIP) | |
1359 | return eval_skip_value (exp); | |
1360 | if (binop_user_defined_p (op, arg1, arg2)) | |
1361 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); | |
1362 | else | |
1363 | { | |
1364 | /* If the user attempts to subscript something that is not an | |
1365 | array or pointer type (like a plain int variable for example), | |
1366 | then report this as an error. */ | |
1367 | ||
1368 | arg1 = coerce_ref (arg1); | |
1369 | struct type *type = check_typedef (value_type (arg1)); | |
1370 | if (type->code () != TYPE_CODE_ARRAY | |
1371 | && type->code () != TYPE_CODE_PTR) | |
1372 | { | |
1373 | if (type->name ()) | |
1374 | error (_("cannot subscript something of type `%s'"), | |
1375 | type->name ()); | |
1376 | else | |
1377 | error (_("cannot subscript requested type")); | |
1378 | } | |
1379 | ||
1380 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1381 | return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1)); | |
1382 | else | |
1383 | return value_subscript (arg1, value_as_long (arg2)); | |
1384 | } | |
1385 | } | |
1386 | ||
0cc96de8 TT |
1387 | /* A helper function for BINOP_EQUAL. */ |
1388 | ||
46916f2b | 1389 | struct value * |
0cc96de8 TT |
1390 | eval_op_equal (struct type *expect_type, struct expression *exp, |
1391 | enum noside noside, enum exp_opcode op, | |
1392 | struct value *arg1, struct value *arg2) | |
1393 | { | |
1394 | if (noside == EVAL_SKIP) | |
1395 | return eval_skip_value (exp); | |
1396 | if (binop_user_defined_p (op, arg1, arg2)) | |
1397 | { | |
1398 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); | |
1399 | } | |
1400 | else | |
1401 | { | |
1402 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
1403 | int tem = value_equal (arg1, arg2); | |
1404 | struct type *type = language_bool_type (exp->language_defn, | |
1405 | exp->gdbarch); | |
1406 | return value_from_longest (type, (LONGEST) tem); | |
1407 | } | |
1408 | } | |
1409 | ||
1fcb3559 TT |
1410 | /* A helper function for BINOP_NOTEQUAL. */ |
1411 | ||
46916f2b | 1412 | struct value * |
1fcb3559 TT |
1413 | eval_op_notequal (struct type *expect_type, struct expression *exp, |
1414 | enum noside noside, enum exp_opcode op, | |
1415 | struct value *arg1, struct value *arg2) | |
1416 | { | |
1417 | if (noside == EVAL_SKIP) | |
1418 | return eval_skip_value (exp); | |
1419 | if (binop_user_defined_p (op, arg1, arg2)) | |
1420 | { | |
1421 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); | |
1422 | } | |
1423 | else | |
1424 | { | |
1425 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
1426 | int tem = value_equal (arg1, arg2); | |
1427 | struct type *type = language_bool_type (exp->language_defn, | |
1428 | exp->gdbarch); | |
1429 | return value_from_longest (type, (LONGEST) ! tem); | |
1430 | } | |
1431 | } | |
1432 | ||
6cad1349 TT |
1433 | /* A helper function for BINOP_LESS. */ |
1434 | ||
46916f2b | 1435 | struct value * |
6cad1349 TT |
1436 | eval_op_less (struct type *expect_type, struct expression *exp, |
1437 | enum noside noside, enum exp_opcode op, | |
1438 | struct value *arg1, struct value *arg2) | |
1439 | { | |
1440 | if (noside == EVAL_SKIP) | |
1441 | return eval_skip_value (exp); | |
1442 | if (binop_user_defined_p (op, arg1, arg2)) | |
1443 | { | |
1444 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); | |
1445 | } | |
1446 | else | |
1447 | { | |
1448 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
1449 | int tem = value_less (arg1, arg2); | |
1450 | struct type *type = language_bool_type (exp->language_defn, | |
1451 | exp->gdbarch); | |
1452 | return value_from_longest (type, (LONGEST) tem); | |
1453 | } | |
1454 | } | |
1455 | ||
1f78d732 TT |
1456 | /* A helper function for BINOP_GTR. */ |
1457 | ||
46916f2b | 1458 | struct value * |
1f78d732 TT |
1459 | eval_op_gtr (struct type *expect_type, struct expression *exp, |
1460 | enum noside noside, enum exp_opcode op, | |
1461 | struct value *arg1, struct value *arg2) | |
1462 | { | |
1463 | if (noside == EVAL_SKIP) | |
1464 | return eval_skip_value (exp); | |
1465 | if (binop_user_defined_p (op, arg1, arg2)) | |
1466 | { | |
1467 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); | |
1468 | } | |
1469 | else | |
1470 | { | |
1471 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
1472 | int tem = value_less (arg2, arg1); | |
1473 | struct type *type = language_bool_type (exp->language_defn, | |
1474 | exp->gdbarch); | |
1475 | return value_from_longest (type, (LONGEST) tem); | |
1476 | } | |
1477 | } | |
1478 | ||
96e3efd9 TT |
1479 | /* A helper function for BINOP_GEQ. */ |
1480 | ||
46916f2b | 1481 | struct value * |
96e3efd9 TT |
1482 | eval_op_geq (struct type *expect_type, struct expression *exp, |
1483 | enum noside noside, enum exp_opcode op, | |
1484 | struct value *arg1, struct value *arg2) | |
1485 | { | |
1486 | if (noside == EVAL_SKIP) | |
1487 | return eval_skip_value (exp); | |
1488 | if (binop_user_defined_p (op, arg1, arg2)) | |
1489 | { | |
1490 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); | |
1491 | } | |
1492 | else | |
1493 | { | |
1494 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
1495 | int tem = value_less (arg2, arg1) || value_equal (arg1, arg2); | |
1496 | struct type *type = language_bool_type (exp->language_defn, | |
1497 | exp->gdbarch); | |
1498 | return value_from_longest (type, (LONGEST) tem); | |
1499 | } | |
1500 | } | |
1501 | ||
60cdd487 TT |
1502 | /* A helper function for BINOP_LEQ. */ |
1503 | ||
46916f2b | 1504 | struct value * |
60cdd487 TT |
1505 | eval_op_leq (struct type *expect_type, struct expression *exp, |
1506 | enum noside noside, enum exp_opcode op, | |
1507 | struct value *arg1, struct value *arg2) | |
1508 | { | |
1509 | if (noside == EVAL_SKIP) | |
1510 | return eval_skip_value (exp); | |
1511 | if (binop_user_defined_p (op, arg1, arg2)) | |
1512 | { | |
1513 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); | |
1514 | } | |
1515 | else | |
1516 | { | |
1517 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
1518 | int tem = value_less (arg1, arg2) || value_equal (arg1, arg2); | |
1519 | struct type *type = language_bool_type (exp->language_defn, | |
1520 | exp->gdbarch); | |
1521 | return value_from_longest (type, (LONGEST) tem); | |
1522 | } | |
1523 | } | |
1524 | ||
eed70b1c TT |
1525 | /* A helper function for BINOP_REPEAT. */ |
1526 | ||
d4eff4c1 | 1527 | struct value * |
eed70b1c | 1528 | eval_op_repeat (struct type *expect_type, struct expression *exp, |
d4eff4c1 | 1529 | enum noside noside, enum exp_opcode op, |
eed70b1c TT |
1530 | struct value *arg1, struct value *arg2) |
1531 | { | |
1532 | if (noside == EVAL_SKIP) | |
1533 | return eval_skip_value (exp); | |
1534 | struct type *type = check_typedef (value_type (arg2)); | |
1535 | if (type->code () != TYPE_CODE_INT | |
1536 | && type->code () != TYPE_CODE_ENUM) | |
1537 | error (_("Non-integral right operand for \"@\" operator.")); | |
1538 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1539 | { | |
1540 | return allocate_repeat_value (value_type (arg1), | |
1541 | longest_to_int (value_as_long (arg2))); | |
1542 | } | |
1543 | else | |
1544 | return value_repeat (arg1, longest_to_int (value_as_long (arg2))); | |
1545 | } | |
1546 | ||
39f288be TT |
1547 | /* A helper function for UNOP_PLUS. */ |
1548 | ||
9307d17b | 1549 | struct value * |
39f288be TT |
1550 | eval_op_plus (struct type *expect_type, struct expression *exp, |
1551 | enum noside noside, enum exp_opcode op, | |
1552 | struct value *arg1) | |
1553 | { | |
1554 | if (noside == EVAL_SKIP) | |
1555 | return eval_skip_value (exp); | |
1556 | if (unop_user_defined_p (op, arg1)) | |
1557 | return value_x_unop (arg1, op, noside); | |
1558 | else | |
1559 | { | |
1560 | unop_promote (exp->language_defn, exp->gdbarch, &arg1); | |
1561 | return value_pos (arg1); | |
1562 | } | |
1563 | } | |
1564 | ||
606d105f TT |
1565 | /* A helper function for UNOP_NEG. */ |
1566 | ||
9307d17b | 1567 | struct value * |
606d105f TT |
1568 | eval_op_neg (struct type *expect_type, struct expression *exp, |
1569 | enum noside noside, enum exp_opcode op, | |
1570 | struct value *arg1) | |
1571 | { | |
1572 | if (noside == EVAL_SKIP) | |
1573 | return eval_skip_value (exp); | |
1574 | if (unop_user_defined_p (op, arg1)) | |
1575 | return value_x_unop (arg1, op, noside); | |
1576 | else | |
1577 | { | |
1578 | unop_promote (exp->language_defn, exp->gdbarch, &arg1); | |
1579 | return value_neg (arg1); | |
1580 | } | |
1581 | } | |
1582 | ||
1f09ec81 TT |
1583 | /* A helper function for UNOP_COMPLEMENT. */ |
1584 | ||
9307d17b | 1585 | struct value * |
1f09ec81 TT |
1586 | eval_op_complement (struct type *expect_type, struct expression *exp, |
1587 | enum noside noside, enum exp_opcode op, | |
1588 | struct value *arg1) | |
1589 | { | |
1590 | if (noside == EVAL_SKIP) | |
1591 | return eval_skip_value (exp); | |
1592 | if (unop_user_defined_p (UNOP_COMPLEMENT, arg1)) | |
1593 | return value_x_unop (arg1, UNOP_COMPLEMENT, noside); | |
1594 | else | |
1595 | { | |
1596 | unop_promote (exp->language_defn, exp->gdbarch, &arg1); | |
1597 | return value_complement (arg1); | |
1598 | } | |
1599 | } | |
1600 | ||
24338fb9 TT |
1601 | /* A helper function for UNOP_LOGICAL_NOT. */ |
1602 | ||
9307d17b | 1603 | struct value * |
24338fb9 TT |
1604 | eval_op_lognot (struct type *expect_type, struct expression *exp, |
1605 | enum noside noside, enum exp_opcode op, | |
1606 | struct value *arg1) | |
1607 | { | |
1608 | if (noside == EVAL_SKIP) | |
1609 | return eval_skip_value (exp); | |
1610 | if (unop_user_defined_p (op, arg1)) | |
1611 | return value_x_unop (arg1, op, noside); | |
1612 | else | |
1613 | { | |
1614 | struct type *type = language_bool_type (exp->language_defn, | |
1615 | exp->gdbarch); | |
1616 | return value_from_longest (type, (LONGEST) value_logical_not (arg1)); | |
1617 | } | |
1618 | } | |
1619 | ||
786f70ee TT |
1620 | /* A helper function for UNOP_IND. */ |
1621 | ||
876469ff | 1622 | struct value * |
786f70ee | 1623 | eval_op_ind (struct type *expect_type, struct expression *exp, |
876469ff | 1624 | enum noside noside, |
786f70ee TT |
1625 | struct value *arg1) |
1626 | { | |
1627 | struct type *type = check_typedef (value_type (arg1)); | |
1628 | if (type->code () == TYPE_CODE_METHODPTR | |
1629 | || type->code () == TYPE_CODE_MEMBERPTR) | |
1630 | error (_("Attempt to dereference pointer " | |
1631 | "to member without an object")); | |
1632 | if (noside == EVAL_SKIP) | |
1633 | return eval_skip_value (exp); | |
876469ff TT |
1634 | if (unop_user_defined_p (UNOP_IND, arg1)) |
1635 | return value_x_unop (arg1, UNOP_IND, noside); | |
786f70ee TT |
1636 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) |
1637 | { | |
1638 | type = check_typedef (value_type (arg1)); | |
1639 | ||
1640 | /* If the type pointed to is dynamic then in order to resolve the | |
1641 | dynamic properties we must actually dereference the pointer. | |
1642 | There is a risk that this dereference will have side-effects | |
1643 | in the inferior, but being able to print accurate type | |
1644 | information seems worth the risk. */ | |
1645 | if ((type->code () != TYPE_CODE_PTR | |
1646 | && !TYPE_IS_REFERENCE (type)) | |
1647 | || !is_dynamic_type (TYPE_TARGET_TYPE (type))) | |
1648 | { | |
1649 | if (type->code () == TYPE_CODE_PTR | |
1650 | || TYPE_IS_REFERENCE (type) | |
1651 | /* In C you can dereference an array to get the 1st elt. */ | |
1652 | || type->code () == TYPE_CODE_ARRAY) | |
1653 | return value_zero (TYPE_TARGET_TYPE (type), | |
1654 | lval_memory); | |
1655 | else if (type->code () == TYPE_CODE_INT) | |
1656 | /* GDB allows dereferencing an int. */ | |
1657 | return value_zero (builtin_type (exp->gdbarch)->builtin_int, | |
1658 | lval_memory); | |
1659 | else | |
1660 | error (_("Attempt to take contents of a non-pointer value.")); | |
1661 | } | |
1662 | } | |
1663 | ||
1664 | /* Allow * on an integer so we can cast it to whatever we want. | |
1665 | This returns an int, which seems like the most C-like thing to | |
1666 | do. "long long" variables are rare enough that | |
1667 | BUILTIN_TYPE_LONGEST would seem to be a mistake. */ | |
1668 | if (type->code () == TYPE_CODE_INT) | |
1669 | return value_at_lazy (builtin_type (exp->gdbarch)->builtin_int, | |
1670 | (CORE_ADDR) value_as_address (arg1)); | |
1671 | return value_ind (arg1); | |
1672 | } | |
1673 | ||
acee9468 TT |
1674 | /* A helper function for UNOP_ALIGNOF. */ |
1675 | ||
ae4bb61e | 1676 | struct value * |
acee9468 TT |
1677 | eval_op_alignof (struct type *expect_type, struct expression *exp, |
1678 | enum noside noside, | |
1679 | struct value *arg1) | |
1680 | { | |
1681 | struct type *type = value_type (arg1); | |
1682 | /* FIXME: This should be size_t. */ | |
1683 | struct type *size_type = builtin_type (exp->gdbarch)->builtin_int; | |
1684 | ULONGEST align = type_align (type); | |
1685 | if (align == 0) | |
1686 | error (_("could not determine alignment of type")); | |
1687 | return value_from_longest (size_type, align); | |
1688 | } | |
1689 | ||
3aef2a07 TT |
1690 | /* A helper function for UNOP_MEMVAL. */ |
1691 | ||
cbc18219 | 1692 | struct value * |
3aef2a07 TT |
1693 | eval_op_memval (struct type *expect_type, struct expression *exp, |
1694 | enum noside noside, | |
1695 | struct value *arg1, struct type *type) | |
1696 | { | |
1697 | if (noside == EVAL_SKIP) | |
1698 | return eval_skip_value (exp); | |
1699 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1700 | return value_zero (type, lval_memory); | |
1701 | else | |
1702 | return value_at_lazy (type, value_as_address (arg1)); | |
1703 | } | |
1704 | ||
00f50884 TT |
1705 | /* A helper function for UNOP_PREINCREMENT. */ |
1706 | ||
6d89e296 | 1707 | struct value * |
00f50884 TT |
1708 | eval_op_preinc (struct type *expect_type, struct expression *exp, |
1709 | enum noside noside, enum exp_opcode op, | |
1710 | struct value *arg1) | |
1711 | { | |
1712 | if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS) | |
1713 | return arg1; | |
1714 | else if (unop_user_defined_p (op, arg1)) | |
1715 | { | |
1716 | return value_x_unop (arg1, op, noside); | |
1717 | } | |
1718 | else | |
1719 | { | |
1720 | struct value *arg2; | |
1721 | if (ptrmath_type_p (exp->language_defn, value_type (arg1))) | |
1722 | arg2 = value_ptradd (arg1, 1); | |
1723 | else | |
1724 | { | |
1725 | struct value *tmp = arg1; | |
1726 | ||
1727 | arg2 = value_one (value_type (arg1)); | |
1728 | binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2); | |
1729 | arg2 = value_binop (tmp, arg2, BINOP_ADD); | |
1730 | } | |
1731 | ||
1732 | return value_assign (arg1, arg2); | |
1733 | } | |
1734 | } | |
1735 | ||
9e1361b7 TT |
1736 | /* A helper function for UNOP_PREDECREMENT. */ |
1737 | ||
6d89e296 | 1738 | struct value * |
9e1361b7 TT |
1739 | eval_op_predec (struct type *expect_type, struct expression *exp, |
1740 | enum noside noside, enum exp_opcode op, | |
1741 | struct value *arg1) | |
1742 | { | |
1743 | if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS) | |
1744 | return arg1; | |
1745 | else if (unop_user_defined_p (op, arg1)) | |
1746 | { | |
1747 | return value_x_unop (arg1, op, noside); | |
1748 | } | |
1749 | else | |
1750 | { | |
1751 | struct value *arg2; | |
1752 | if (ptrmath_type_p (exp->language_defn, value_type (arg1))) | |
1753 | arg2 = value_ptradd (arg1, -1); | |
1754 | else | |
1755 | { | |
1756 | struct value *tmp = arg1; | |
1757 | ||
1758 | arg2 = value_one (value_type (arg1)); | |
1759 | binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2); | |
1760 | arg2 = value_binop (tmp, arg2, BINOP_SUB); | |
1761 | } | |
1762 | ||
1763 | return value_assign (arg1, arg2); | |
1764 | } | |
1765 | } | |
1766 | ||
abffe116 TT |
1767 | /* A helper function for UNOP_POSTINCREMENT. */ |
1768 | ||
6d89e296 | 1769 | struct value * |
abffe116 TT |
1770 | eval_op_postinc (struct type *expect_type, struct expression *exp, |
1771 | enum noside noside, enum exp_opcode op, | |
1772 | struct value *arg1) | |
1773 | { | |
1774 | if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS) | |
1775 | return arg1; | |
1776 | else if (unop_user_defined_p (op, arg1)) | |
1777 | { | |
1778 | return value_x_unop (arg1, op, noside); | |
1779 | } | |
1780 | else | |
1781 | { | |
1782 | struct value *arg3 = value_non_lval (arg1); | |
1783 | struct value *arg2; | |
1784 | ||
1785 | if (ptrmath_type_p (exp->language_defn, value_type (arg1))) | |
1786 | arg2 = value_ptradd (arg1, 1); | |
1787 | else | |
1788 | { | |
1789 | struct value *tmp = arg1; | |
1790 | ||
1791 | arg2 = value_one (value_type (arg1)); | |
1792 | binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2); | |
1793 | arg2 = value_binop (tmp, arg2, BINOP_ADD); | |
1794 | } | |
1795 | ||
1796 | value_assign (arg1, arg2); | |
1797 | return arg3; | |
1798 | } | |
1799 | } | |
1800 | ||
a220ead5 TT |
1801 | /* A helper function for UNOP_POSTDECREMENT. */ |
1802 | ||
6d89e296 | 1803 | struct value * |
a220ead5 TT |
1804 | eval_op_postdec (struct type *expect_type, struct expression *exp, |
1805 | enum noside noside, enum exp_opcode op, | |
1806 | struct value *arg1) | |
1807 | { | |
1808 | if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS) | |
1809 | return arg1; | |
1810 | else if (unop_user_defined_p (op, arg1)) | |
1811 | { | |
1812 | return value_x_unop (arg1, op, noside); | |
1813 | } | |
1814 | else | |
1815 | { | |
1816 | struct value *arg3 = value_non_lval (arg1); | |
1817 | struct value *arg2; | |
1818 | ||
1819 | if (ptrmath_type_p (exp->language_defn, value_type (arg1))) | |
1820 | arg2 = value_ptradd (arg1, -1); | |
1821 | else | |
1822 | { | |
1823 | struct value *tmp = arg1; | |
1824 | ||
1825 | arg2 = value_one (value_type (arg1)); | |
1826 | binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2); | |
1827 | arg2 = value_binop (tmp, arg2, BINOP_SUB); | |
1828 | } | |
1829 | ||
1830 | value_assign (arg1, arg2); | |
1831 | return arg3; | |
1832 | } | |
1833 | } | |
1834 | ||
aec95807 TT |
1835 | /* A helper function for OP_TYPE. */ |
1836 | ||
5b5f5140 | 1837 | struct value * |
aec95807 TT |
1838 | eval_op_type (struct type *expect_type, struct expression *exp, |
1839 | enum noside noside, struct type *type) | |
1840 | { | |
1841 | if (noside == EVAL_SKIP) | |
1842 | return eval_skip_value (exp); | |
1843 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1844 | return allocate_value (type); | |
1845 | else | |
1846 | error (_("Attempt to use a type name as an expression")); | |
1847 | } | |
1848 | ||
fb5ba2ab TT |
1849 | /* A helper function for BINOP_ASSIGN_MODIFY. */ |
1850 | ||
e5946e16 | 1851 | struct value * |
fb5ba2ab TT |
1852 | eval_binop_assign_modify (struct type *expect_type, struct expression *exp, |
1853 | enum noside noside, enum exp_opcode op, | |
1854 | struct value *arg1, struct value *arg2) | |
1855 | { | |
1856 | if (noside == EVAL_SKIP || noside == EVAL_AVOID_SIDE_EFFECTS) | |
1857 | return arg1; | |
1858 | if (binop_user_defined_p (op, arg1, arg2)) | |
1859 | return value_x_binop (arg1, arg2, BINOP_ASSIGN_MODIFY, op, noside); | |
1860 | else if (op == BINOP_ADD && ptrmath_type_p (exp->language_defn, | |
1861 | value_type (arg1)) | |
1862 | && is_integral_type (value_type (arg2))) | |
1863 | arg2 = value_ptradd (arg1, value_as_long (arg2)); | |
1864 | else if (op == BINOP_SUB && ptrmath_type_p (exp->language_defn, | |
1865 | value_type (arg1)) | |
1866 | && is_integral_type (value_type (arg2))) | |
1867 | arg2 = value_ptradd (arg1, - value_as_long (arg2)); | |
1868 | else | |
1869 | { | |
1870 | struct value *tmp = arg1; | |
1871 | ||
1872 | /* For shift and integer exponentiation operations, | |
1873 | only promote the first argument. */ | |
1874 | if ((op == BINOP_LSH || op == BINOP_RSH || op == BINOP_EXP) | |
1875 | && is_integral_type (value_type (arg2))) | |
1876 | unop_promote (exp->language_defn, exp->gdbarch, &tmp); | |
1877 | else | |
1878 | binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2); | |
1879 | ||
1880 | arg2 = value_binop (tmp, arg2, op); | |
1881 | } | |
1882 | return value_assign (arg1, arg2); | |
1883 | } | |
1884 | ||
5e80600e TT |
1885 | /* Note that ARGS needs 2 empty slots up front and must end with a |
1886 | null pointer. */ | |
1887 | static struct value * | |
1888 | eval_op_objc_msgcall (struct type *expect_type, struct expression *exp, | |
1889 | enum noside noside, CORE_ADDR selector, | |
1890 | value *target, gdb::array_view<value *> args) | |
1891 | { | |
1892 | CORE_ADDR responds_selector = 0; | |
1893 | CORE_ADDR method_selector = 0; | |
1894 | ||
1895 | int struct_return = 0; | |
1896 | ||
1897 | struct value *msg_send = NULL; | |
1898 | struct value *msg_send_stret = NULL; | |
1899 | int gnu_runtime = 0; | |
1900 | ||
1901 | struct value *method = NULL; | |
1902 | struct value *called_method = NULL; | |
1903 | ||
1904 | struct type *selector_type = NULL; | |
1905 | struct type *long_type; | |
1906 | struct type *type; | |
1907 | ||
1908 | struct value *ret = NULL; | |
1909 | CORE_ADDR addr = 0; | |
1910 | ||
1911 | value *argvec[5]; | |
1912 | ||
1913 | long_type = builtin_type (exp->gdbarch)->builtin_long; | |
1914 | selector_type = builtin_type (exp->gdbarch)->builtin_data_ptr; | |
1915 | ||
1916 | if (value_as_long (target) == 0) | |
1917 | return value_from_longest (long_type, 0); | |
1918 | ||
1919 | if (lookup_minimal_symbol ("objc_msg_lookup", 0, 0).minsym) | |
1920 | gnu_runtime = 1; | |
1921 | ||
1922 | /* Find the method dispatch (Apple runtime) or method lookup | |
1923 | (GNU runtime) function for Objective-C. These will be used | |
1924 | to lookup the symbol information for the method. If we | |
1925 | can't find any symbol information, then we'll use these to | |
1926 | call the method, otherwise we can call the method | |
1927 | directly. The msg_send_stret function is used in the special | |
1928 | case of a method that returns a structure (Apple runtime | |
1929 | only). */ | |
1930 | if (gnu_runtime) | |
1931 | { | |
1932 | type = selector_type; | |
1933 | ||
1934 | type = lookup_function_type (type); | |
1935 | type = lookup_pointer_type (type); | |
1936 | type = lookup_function_type (type); | |
1937 | type = lookup_pointer_type (type); | |
1938 | ||
1939 | msg_send = find_function_in_inferior ("objc_msg_lookup", NULL); | |
1940 | msg_send_stret | |
1941 | = find_function_in_inferior ("objc_msg_lookup", NULL); | |
1942 | ||
1943 | msg_send = value_from_pointer (type, value_as_address (msg_send)); | |
1944 | msg_send_stret = value_from_pointer (type, | |
1945 | value_as_address (msg_send_stret)); | |
1946 | } | |
1947 | else | |
1948 | { | |
1949 | msg_send = find_function_in_inferior ("objc_msgSend", NULL); | |
1950 | /* Special dispatcher for methods returning structs. */ | |
1951 | msg_send_stret | |
1952 | = find_function_in_inferior ("objc_msgSend_stret", NULL); | |
1953 | } | |
1954 | ||
1955 | /* Verify the target object responds to this method. The | |
1956 | standard top-level 'Object' class uses a different name for | |
1957 | the verification method than the non-standard, but more | |
1958 | often used, 'NSObject' class. Make sure we check for both. */ | |
1959 | ||
1960 | responds_selector | |
1961 | = lookup_child_selector (exp->gdbarch, "respondsToSelector:"); | |
1962 | if (responds_selector == 0) | |
1963 | responds_selector | |
1964 | = lookup_child_selector (exp->gdbarch, "respondsTo:"); | |
1965 | ||
1966 | if (responds_selector == 0) | |
1967 | error (_("no 'respondsTo:' or 'respondsToSelector:' method")); | |
1968 | ||
1969 | method_selector | |
1970 | = lookup_child_selector (exp->gdbarch, "methodForSelector:"); | |
1971 | if (method_selector == 0) | |
1972 | method_selector | |
1973 | = lookup_child_selector (exp->gdbarch, "methodFor:"); | |
1974 | ||
1975 | if (method_selector == 0) | |
1976 | error (_("no 'methodFor:' or 'methodForSelector:' method")); | |
1977 | ||
1978 | /* Call the verification method, to make sure that the target | |
1979 | class implements the desired method. */ | |
1980 | ||
1981 | argvec[0] = msg_send; | |
1982 | argvec[1] = target; | |
1983 | argvec[2] = value_from_longest (long_type, responds_selector); | |
1984 | argvec[3] = value_from_longest (long_type, selector); | |
1985 | argvec[4] = 0; | |
1986 | ||
1987 | ret = call_function_by_hand (argvec[0], NULL, {argvec + 1, 3}); | |
1988 | if (gnu_runtime) | |
1989 | { | |
1990 | /* Function objc_msg_lookup returns a pointer. */ | |
1991 | argvec[0] = ret; | |
1992 | ret = call_function_by_hand (argvec[0], NULL, {argvec + 1, 3}); | |
1993 | } | |
1994 | if (value_as_long (ret) == 0) | |
1995 | error (_("Target does not respond to this message selector.")); | |
1996 | ||
1997 | /* Call "methodForSelector:" method, to get the address of a | |
1998 | function method that implements this selector for this | |
1999 | class. If we can find a symbol at that address, then we | |
2000 | know the return type, parameter types etc. (that's a good | |
2001 | thing). */ | |
2002 | ||
2003 | argvec[0] = msg_send; | |
2004 | argvec[1] = target; | |
2005 | argvec[2] = value_from_longest (long_type, method_selector); | |
2006 | argvec[3] = value_from_longest (long_type, selector); | |
2007 | argvec[4] = 0; | |
2008 | ||
2009 | ret = call_function_by_hand (argvec[0], NULL, {argvec + 1, 3}); | |
2010 | if (gnu_runtime) | |
2011 | { | |
2012 | argvec[0] = ret; | |
2013 | ret = call_function_by_hand (argvec[0], NULL, {argvec + 1, 3}); | |
2014 | } | |
2015 | ||
2016 | /* ret should now be the selector. */ | |
2017 | ||
2018 | addr = value_as_long (ret); | |
2019 | if (addr) | |
2020 | { | |
2021 | struct symbol *sym = NULL; | |
2022 | ||
2023 | /* The address might point to a function descriptor; | |
2024 | resolve it to the actual code address instead. */ | |
2025 | addr = gdbarch_convert_from_func_ptr_addr (exp->gdbarch, addr, | |
2026 | current_top_target ()); | |
2027 | ||
2028 | /* Is it a high_level symbol? */ | |
2029 | sym = find_pc_function (addr); | |
2030 | if (sym != NULL) | |
2031 | method = value_of_variable (sym, 0); | |
2032 | } | |
2033 | ||
2034 | /* If we found a method with symbol information, check to see | |
2035 | if it returns a struct. Otherwise assume it doesn't. */ | |
2036 | ||
2037 | if (method) | |
2038 | { | |
2039 | CORE_ADDR funaddr; | |
2040 | struct type *val_type; | |
2041 | ||
2042 | funaddr = find_function_addr (method, &val_type); | |
2043 | ||
2044 | block_for_pc (funaddr); | |
2045 | ||
2046 | val_type = check_typedef (val_type); | |
2047 | ||
2048 | if ((val_type == NULL) | |
2049 | || (val_type->code () == TYPE_CODE_ERROR)) | |
2050 | { | |
2051 | if (expect_type != NULL) | |
2052 | val_type = expect_type; | |
2053 | } | |
2054 | ||
2055 | struct_return = using_struct_return (exp->gdbarch, method, | |
2056 | val_type); | |
2057 | } | |
2058 | else if (expect_type != NULL) | |
2059 | { | |
2060 | struct_return = using_struct_return (exp->gdbarch, NULL, | |
2061 | check_typedef (expect_type)); | |
2062 | } | |
2063 | ||
2064 | /* Found a function symbol. Now we will substitute its | |
2065 | value in place of the message dispatcher (obj_msgSend), | |
2066 | so that we call the method directly instead of thru | |
2067 | the dispatcher. The main reason for doing this is that | |
2068 | we can now evaluate the return value and parameter values | |
2069 | according to their known data types, in case we need to | |
2070 | do things like promotion, dereferencing, special handling | |
2071 | of structs and doubles, etc. | |
2072 | ||
2073 | We want to use the type signature of 'method', but still | |
2074 | jump to objc_msgSend() or objc_msgSend_stret() to better | |
2075 | mimic the behavior of the runtime. */ | |
2076 | ||
2077 | if (method) | |
2078 | { | |
2079 | if (value_type (method)->code () != TYPE_CODE_FUNC) | |
2080 | error (_("method address has symbol information " | |
2081 | "with non-function type; skipping")); | |
2082 | ||
2083 | /* Create a function pointer of the appropriate type, and | |
2084 | replace its value with the value of msg_send or | |
2085 | msg_send_stret. We must use a pointer here, as | |
2086 | msg_send and msg_send_stret are of pointer type, and | |
2087 | the representation may be different on systems that use | |
2088 | function descriptors. */ | |
2089 | if (struct_return) | |
2090 | called_method | |
2091 | = value_from_pointer (lookup_pointer_type (value_type (method)), | |
2092 | value_as_address (msg_send_stret)); | |
2093 | else | |
2094 | called_method | |
2095 | = value_from_pointer (lookup_pointer_type (value_type (method)), | |
2096 | value_as_address (msg_send)); | |
2097 | } | |
2098 | else | |
2099 | { | |
2100 | if (struct_return) | |
2101 | called_method = msg_send_stret; | |
2102 | else | |
2103 | called_method = msg_send; | |
2104 | } | |
2105 | ||
2106 | if (noside == EVAL_SKIP) | |
2107 | return eval_skip_value (exp); | |
2108 | ||
2109 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
2110 | { | |
2111 | /* If the return type doesn't look like a function type, | |
2112 | call an error. This can happen if somebody tries to | |
2113 | turn a variable into a function call. This is here | |
2114 | because people often want to call, eg, strcmp, which | |
2115 | gdb doesn't know is a function. If gdb isn't asked for | |
2116 | it's opinion (ie. through "whatis"), it won't offer | |
2117 | it. */ | |
2118 | ||
2119 | struct type *callee_type = value_type (called_method); | |
2120 | ||
2121 | if (callee_type && callee_type->code () == TYPE_CODE_PTR) | |
2122 | callee_type = TYPE_TARGET_TYPE (callee_type); | |
2123 | callee_type = TYPE_TARGET_TYPE (callee_type); | |
2124 | ||
2125 | if (callee_type) | |
2126 | { | |
2127 | if ((callee_type->code () == TYPE_CODE_ERROR) && expect_type) | |
2128 | return allocate_value (expect_type); | |
2129 | else | |
2130 | return allocate_value (callee_type); | |
2131 | } | |
2132 | else | |
2133 | error (_("Expression of type other than " | |
2134 | "\"method returning ...\" used as a method")); | |
2135 | } | |
2136 | ||
2137 | /* Now depending on whether we found a symbol for the method, | |
2138 | we will either call the runtime dispatcher or the method | |
2139 | directly. */ | |
2140 | ||
2141 | args[0] = target; | |
2142 | args[1] = value_from_longest (long_type, selector); | |
2143 | ||
2144 | if (gnu_runtime && (method != NULL)) | |
2145 | { | |
2146 | /* Function objc_msg_lookup returns a pointer. */ | |
2147 | struct type *tem_type = value_type (called_method); | |
2148 | tem_type = lookup_pointer_type (lookup_function_type (tem_type)); | |
2149 | deprecated_set_value_type (called_method, tem_type); | |
2150 | called_method = call_function_by_hand (called_method, NULL, args); | |
2151 | } | |
2152 | ||
2153 | return call_function_by_hand (called_method, NULL, args); | |
2154 | } | |
2155 | ||
c0d7ed8c TT |
2156 | /* Helper function for MULTI_SUBSCRIPT. */ |
2157 | ||
2158 | static struct value * | |
2159 | eval_multi_subscript (struct type *expect_type, struct expression *exp, | |
2160 | enum noside noside, value *arg1, | |
2161 | gdb::array_view<value *> args) | |
2162 | { | |
2163 | if (noside == EVAL_SKIP) | |
2164 | return arg1; | |
2165 | for (value *arg2 : args) | |
2166 | { | |
2167 | if (binop_user_defined_p (MULTI_SUBSCRIPT, arg1, arg2)) | |
2168 | { | |
2169 | arg1 = value_x_binop (arg1, arg2, MULTI_SUBSCRIPT, OP_NULL, noside); | |
2170 | } | |
2171 | else | |
2172 | { | |
2173 | arg1 = coerce_ref (arg1); | |
2174 | struct type *type = check_typedef (value_type (arg1)); | |
2175 | ||
2176 | switch (type->code ()) | |
2177 | { | |
2178 | case TYPE_CODE_PTR: | |
2179 | case TYPE_CODE_ARRAY: | |
2180 | case TYPE_CODE_STRING: | |
2181 | arg1 = value_subscript (arg1, value_as_long (arg2)); | |
2182 | break; | |
2183 | ||
2184 | default: | |
2185 | if (type->name ()) | |
2186 | error (_("cannot subscript something of type `%s'"), | |
2187 | type->name ()); | |
2188 | else | |
2189 | error (_("cannot subscript requested type")); | |
2190 | } | |
2191 | } | |
2192 | } | |
2193 | return (arg1); | |
2194 | } | |
2195 | ||
085734dd TT |
2196 | namespace expr |
2197 | { | |
2198 | ||
2199 | value * | |
2200 | objc_msgcall_operation::evaluate (struct type *expect_type, | |
2201 | struct expression *exp, | |
2202 | enum noside noside) | |
2203 | { | |
2204 | enum noside sub_no_side = EVAL_NORMAL; | |
2205 | struct type *selector_type = builtin_type (exp->gdbarch)->builtin_data_ptr; | |
2206 | ||
2207 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
2208 | sub_no_side = EVAL_NORMAL; | |
2209 | else | |
2210 | sub_no_side = noside; | |
2211 | value *target | |
2212 | = std::get<1> (m_storage)->evaluate (selector_type, exp, sub_no_side); | |
2213 | ||
2214 | if (value_as_long (target) == 0) | |
2215 | sub_no_side = EVAL_AVOID_SIDE_EFFECTS; | |
2216 | else | |
2217 | sub_no_side = noside; | |
2218 | std::vector<operation_up> &args = std::get<2> (m_storage); | |
2219 | value **argvec = XALLOCAVEC (struct value *, args.size () + 3); | |
2220 | argvec[0] = nullptr; | |
2221 | argvec[1] = nullptr; | |
2222 | for (int i = 0; i < args.size (); ++i) | |
2223 | argvec[i + 2] = args[i]->evaluate_with_coercion (exp, sub_no_side); | |
2224 | argvec[args.size () + 2] = nullptr; | |
2225 | ||
2226 | return eval_op_objc_msgcall (expect_type, exp, noside, std:: | |
2227 | get<0> (m_storage), target, | |
2228 | gdb::make_array_view (argvec, | |
2229 | args.size () + 3)); | |
2230 | } | |
2231 | ||
821e72d7 TT |
2232 | value * |
2233 | multi_subscript_operation::evaluate (struct type *expect_type, | |
2234 | struct expression *exp, | |
2235 | enum noside noside) | |
2236 | { | |
2237 | value *arg1 = std::get<0> (m_storage)->evaluate_with_coercion (exp, noside); | |
2238 | std::vector<operation_up> &values = std::get<1> (m_storage); | |
2239 | value **argvec = XALLOCAVEC (struct value *, values.size ()); | |
2240 | for (int ix = 0; ix < values.size (); ++ix) | |
2241 | argvec[ix] = values[ix]->evaluate_with_coercion (exp, noside); | |
2242 | return eval_multi_subscript (expect_type, exp, noside, arg1, | |
2243 | gdb::make_array_view (argvec, values.size ())); | |
085734dd TT |
2244 | } |
2245 | ||
5019124b TT |
2246 | value * |
2247 | logical_and_operation::evaluate (struct type *expect_type, | |
2248 | struct expression *exp, | |
2249 | enum noside noside) | |
2250 | { | |
2251 | value *arg1 = std::get<0> (m_storage)->evaluate (nullptr, exp, noside); | |
2252 | if (noside == EVAL_SKIP) | |
2253 | return eval_skip_value (exp); | |
2254 | ||
2255 | value *arg2 = std::get<1> (m_storage)->evaluate (nullptr, exp, | |
2256 | EVAL_AVOID_SIDE_EFFECTS); | |
2257 | ||
2258 | if (binop_user_defined_p (BINOP_LOGICAL_AND, arg1, arg2)) | |
2259 | { | |
2260 | arg2 = std::get<1> (m_storage)->evaluate (nullptr, exp, noside); | |
2261 | return value_x_binop (arg1, arg2, BINOP_LOGICAL_AND, OP_NULL, noside); | |
2262 | } | |
2263 | else | |
2264 | { | |
2265 | int tem = value_logical_not (arg1); | |
2266 | if (!tem) | |
2267 | { | |
2268 | arg2 = std::get<1> (m_storage)->evaluate (nullptr, exp, noside); | |
2269 | tem = value_logical_not (arg2); | |
2270 | } | |
2271 | struct type *type = language_bool_type (exp->language_defn, | |
2272 | exp->gdbarch); | |
2273 | return value_from_longest (type, !tem); | |
2274 | } | |
2275 | } | |
2276 | ||
2277 | value * | |
2278 | logical_or_operation::evaluate (struct type *expect_type, | |
2279 | struct expression *exp, | |
2280 | enum noside noside) | |
2281 | { | |
2282 | value *arg1 = std::get<0> (m_storage)->evaluate (nullptr, exp, noside); | |
2283 | if (noside == EVAL_SKIP) | |
2284 | return eval_skip_value (exp); | |
2285 | ||
2286 | value *arg2 = std::get<1> (m_storage)->evaluate (nullptr, exp, | |
2287 | EVAL_AVOID_SIDE_EFFECTS); | |
2288 | ||
2289 | if (binop_user_defined_p (BINOP_LOGICAL_OR, arg1, arg2)) | |
2290 | { | |
2291 | arg2 = std::get<1> (m_storage)->evaluate (nullptr, exp, noside); | |
2292 | return value_x_binop (arg1, arg2, BINOP_LOGICAL_OR, OP_NULL, noside); | |
2293 | } | |
2294 | else | |
2295 | { | |
2296 | int tem = value_logical_not (arg1); | |
2297 | if (tem) | |
2298 | { | |
2299 | arg2 = std::get<1> (m_storage)->evaluate (nullptr, exp, noside); | |
2300 | tem = value_logical_not (arg2); | |
2301 | } | |
2302 | ||
2303 | struct type *type = language_bool_type (exp->language_defn, | |
2304 | exp->gdbarch); | |
2305 | return value_from_longest (type, !tem); | |
2306 | } | |
2307 | } | |
2308 | ||
e4479080 TT |
2309 | value * |
2310 | adl_func_operation::evaluate (struct type *expect_type, | |
2311 | struct expression *exp, | |
2312 | enum noside noside) | |
2313 | { | |
2314 | std::vector<operation_up> &arg_ops = std::get<2> (m_storage); | |
2315 | std::vector<value *> args (arg_ops.size ()); | |
2316 | for (int i = 0; i < arg_ops.size (); ++i) | |
2317 | args[i] = arg_ops[i]->evaluate_with_coercion (exp, noside); | |
2318 | ||
2319 | struct symbol *symp; | |
2320 | find_overload_match (args, std::get<0> (m_storage).c_str (), | |
2321 | NON_METHOD, | |
2322 | nullptr, nullptr, | |
2323 | nullptr, &symp, nullptr, 0, noside); | |
2324 | if (SYMBOL_TYPE (symp)->code () == TYPE_CODE_ERROR) | |
2325 | error_unknown_type (symp->print_name ()); | |
2326 | value *callee = evaluate_var_value (noside, std::get<1> (m_storage), symp); | |
2327 | return evaluate_subexp_do_call (exp, noside, callee, args, | |
2328 | nullptr, expect_type); | |
2329 | ||
2330 | } | |
2331 | ||
1c02eb30 TT |
2332 | /* This function evaluates brace-initializers (in C/C++) for |
2333 | structure types. */ | |
2334 | ||
2335 | struct value * | |
2336 | array_operation::evaluate_struct_tuple (struct value *struct_val, | |
2337 | struct expression *exp, | |
2338 | enum noside noside, int nargs) | |
2339 | { | |
2340 | const std::vector<operation_up> &in_args = std::get<2> (m_storage); | |
2341 | struct type *struct_type = check_typedef (value_type (struct_val)); | |
2342 | struct type *field_type; | |
2343 | int fieldno = -1; | |
2344 | ||
2345 | int idx = 0; | |
2346 | while (--nargs >= 0) | |
2347 | { | |
2348 | struct value *val = NULL; | |
2349 | int bitpos, bitsize; | |
2350 | bfd_byte *addr; | |
2351 | ||
2352 | fieldno++; | |
2353 | /* Skip static fields. */ | |
2354 | while (fieldno < struct_type->num_fields () | |
2355 | && field_is_static (&struct_type->field (fieldno))) | |
2356 | fieldno++; | |
2357 | if (fieldno >= struct_type->num_fields ()) | |
2358 | error (_("too many initializers")); | |
2359 | field_type = struct_type->field (fieldno).type (); | |
2360 | if (field_type->code () == TYPE_CODE_UNION | |
2361 | && TYPE_FIELD_NAME (struct_type, fieldno)[0] == '0') | |
2362 | error (_("don't know which variant you want to set")); | |
2363 | ||
2364 | /* Here, struct_type is the type of the inner struct, | |
2365 | while substruct_type is the type of the inner struct. | |
2366 | These are the same for normal structures, but a variant struct | |
2367 | contains anonymous union fields that contain substruct fields. | |
2368 | The value fieldno is the index of the top-level (normal or | |
2369 | anonymous union) field in struct_field, while the value | |
2370 | subfieldno is the index of the actual real (named inner) field | |
2371 | in substruct_type. */ | |
2372 | ||
2373 | field_type = struct_type->field (fieldno).type (); | |
2374 | if (val == 0) | |
2375 | val = in_args[idx++]->evaluate (field_type, exp, noside); | |
2376 | ||
2377 | /* Now actually set the field in struct_val. */ | |
2378 | ||
2379 | /* Assign val to field fieldno. */ | |
2380 | if (value_type (val) != field_type) | |
2381 | val = value_cast (field_type, val); | |
2382 | ||
2383 | bitsize = TYPE_FIELD_BITSIZE (struct_type, fieldno); | |
2384 | bitpos = TYPE_FIELD_BITPOS (struct_type, fieldno); | |
2385 | addr = value_contents_writeable (struct_val) + bitpos / 8; | |
2386 | if (bitsize) | |
2387 | modify_field (struct_type, addr, | |
2388 | value_as_long (val), bitpos % 8, bitsize); | |
2389 | else | |
2390 | memcpy (addr, value_contents (val), | |
2391 | TYPE_LENGTH (value_type (val))); | |
2392 | ||
2393 | } | |
2394 | return struct_val; | |
2395 | } | |
2396 | ||
2397 | value * | |
2398 | array_operation::evaluate (struct type *expect_type, | |
2399 | struct expression *exp, | |
2400 | enum noside noside) | |
2401 | { | |
2402 | int tem; | |
2403 | int tem2 = std::get<0> (m_storage); | |
2404 | int tem3 = std::get<1> (m_storage); | |
2405 | const std::vector<operation_up> &in_args = std::get<2> (m_storage); | |
2406 | int nargs = tem3 - tem2 + 1; | |
2407 | struct type *type = expect_type ? check_typedef (expect_type) : nullptr; | |
2408 | ||
2409 | if (expect_type != nullptr && noside != EVAL_SKIP | |
2410 | && type->code () == TYPE_CODE_STRUCT) | |
2411 | { | |
2412 | struct value *rec = allocate_value (expect_type); | |
2413 | ||
2414 | memset (value_contents_raw (rec), '\0', TYPE_LENGTH (type)); | |
2415 | return evaluate_struct_tuple (rec, exp, noside, nargs); | |
2416 | } | |
2417 | ||
2418 | if (expect_type != nullptr && noside != EVAL_SKIP | |
2419 | && type->code () == TYPE_CODE_ARRAY) | |
2420 | { | |
2421 | struct type *range_type = type->index_type (); | |
2422 | struct type *element_type = TYPE_TARGET_TYPE (type); | |
2423 | struct value *array = allocate_value (expect_type); | |
2424 | int element_size = TYPE_LENGTH (check_typedef (element_type)); | |
2425 | LONGEST low_bound, high_bound, index; | |
2426 | ||
2427 | if (!get_discrete_bounds (range_type, &low_bound, &high_bound)) | |
2428 | { | |
2429 | low_bound = 0; | |
2430 | high_bound = (TYPE_LENGTH (type) / element_size) - 1; | |
2431 | } | |
2432 | index = low_bound; | |
2433 | memset (value_contents_raw (array), 0, TYPE_LENGTH (expect_type)); | |
2434 | for (tem = nargs; --nargs >= 0;) | |
2435 | { | |
2436 | struct value *element; | |
2437 | ||
2438 | element = in_args[index - low_bound]->evaluate (element_type, | |
2439 | exp, noside); | |
2440 | if (value_type (element) != element_type) | |
2441 | element = value_cast (element_type, element); | |
2442 | if (index > high_bound) | |
2443 | /* To avoid memory corruption. */ | |
2444 | error (_("Too many array elements")); | |
2445 | memcpy (value_contents_raw (array) | |
2446 | + (index - low_bound) * element_size, | |
2447 | value_contents (element), | |
2448 | element_size); | |
2449 | index++; | |
2450 | } | |
2451 | return array; | |
2452 | } | |
2453 | ||
2454 | if (expect_type != nullptr && noside != EVAL_SKIP | |
2455 | && type->code () == TYPE_CODE_SET) | |
2456 | { | |
2457 | struct value *set = allocate_value (expect_type); | |
2458 | gdb_byte *valaddr = value_contents_raw (set); | |
2459 | struct type *element_type = type->index_type (); | |
2460 | struct type *check_type = element_type; | |
2461 | LONGEST low_bound, high_bound; | |
2462 | ||
2463 | /* Get targettype of elementtype. */ | |
2464 | while (check_type->code () == TYPE_CODE_RANGE | |
2465 | || check_type->code () == TYPE_CODE_TYPEDEF) | |
2466 | check_type = TYPE_TARGET_TYPE (check_type); | |
2467 | ||
2468 | if (!get_discrete_bounds (element_type, &low_bound, &high_bound)) | |
2469 | error (_("(power)set type with unknown size")); | |
2470 | memset (valaddr, '\0', TYPE_LENGTH (type)); | |
2471 | int idx = 0; | |
2472 | for (tem = 0; tem < nargs; tem++) | |
2473 | { | |
2474 | LONGEST range_low, range_high; | |
2475 | struct type *range_low_type, *range_high_type; | |
2476 | struct value *elem_val; | |
2477 | ||
2478 | elem_val = in_args[idx++]->evaluate (element_type, exp, noside); | |
2479 | range_low_type = range_high_type = value_type (elem_val); | |
2480 | range_low = range_high = value_as_long (elem_val); | |
2481 | ||
2482 | /* Check types of elements to avoid mixture of elements from | |
2483 | different types. Also check if type of element is "compatible" | |
2484 | with element type of powerset. */ | |
2485 | if (range_low_type->code () == TYPE_CODE_RANGE) | |
2486 | range_low_type = TYPE_TARGET_TYPE (range_low_type); | |
2487 | if (range_high_type->code () == TYPE_CODE_RANGE) | |
2488 | range_high_type = TYPE_TARGET_TYPE (range_high_type); | |
2489 | if ((range_low_type->code () != range_high_type->code ()) | |
2490 | || (range_low_type->code () == TYPE_CODE_ENUM | |
2491 | && (range_low_type != range_high_type))) | |
2492 | /* different element modes. */ | |
2493 | error (_("POWERSET tuple elements of different mode")); | |
2494 | if ((check_type->code () != range_low_type->code ()) | |
2495 | || (check_type->code () == TYPE_CODE_ENUM | |
2496 | && range_low_type != check_type)) | |
2497 | error (_("incompatible POWERSET tuple elements")); | |
2498 | if (range_low > range_high) | |
2499 | { | |
2500 | warning (_("empty POWERSET tuple range")); | |
2501 | continue; | |
2502 | } | |
2503 | if (range_low < low_bound || range_high > high_bound) | |
2504 | error (_("POWERSET tuple element out of range")); | |
2505 | range_low -= low_bound; | |
2506 | range_high -= low_bound; | |
2507 | for (; range_low <= range_high; range_low++) | |
2508 | { | |
2509 | int bit_index = (unsigned) range_low % TARGET_CHAR_BIT; | |
2510 | ||
2511 | if (gdbarch_byte_order (exp->gdbarch) == BFD_ENDIAN_BIG) | |
2512 | bit_index = TARGET_CHAR_BIT - 1 - bit_index; | |
2513 | valaddr[(unsigned) range_low / TARGET_CHAR_BIT] | |
2514 | |= 1 << bit_index; | |
2515 | } | |
2516 | } | |
2517 | return set; | |
2518 | } | |
2519 | ||
2520 | value **argvec = XALLOCAVEC (struct value *, nargs); | |
2521 | for (tem = 0; tem < nargs; tem++) | |
2522 | { | |
2523 | /* Ensure that array expressions are coerced into pointer | |
2524 | objects. */ | |
2525 | argvec[tem] = in_args[tem]->evaluate_with_coercion (exp, noside); | |
2526 | } | |
2527 | if (noside == EVAL_SKIP) | |
2528 | return eval_skip_value (exp); | |
2529 | return value_array (tem2, tem3, argvec); | |
2530 | } | |
2531 | ||
821e72d7 | 2532 | } |
085734dd | 2533 | |
c906108c | 2534 | \f |
13ea014a TT |
2535 | /* Helper for evaluate_subexp_for_address. */ |
2536 | ||
2537 | static value * | |
2538 | evaluate_subexp_for_address_base (struct expression *exp, enum noside noside, | |
2539 | value *x) | |
2540 | { | |
2541 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
2542 | { | |
2543 | struct type *type = check_typedef (value_type (x)); | |
2544 | ||
2545 | if (TYPE_IS_REFERENCE (type)) | |
2546 | return value_zero (lookup_pointer_type (TYPE_TARGET_TYPE (type)), | |
2547 | not_lval); | |
2548 | else if (VALUE_LVAL (x) == lval_memory || value_must_coerce_to_target (x)) | |
2549 | return value_zero (lookup_pointer_type (value_type (x)), | |
2550 | not_lval); | |
2551 | else | |
2552 | error (_("Attempt to take address of " | |
2553 | "value not located in memory.")); | |
2554 | } | |
2555 | return value_addr (x); | |
2556 | } | |
2557 | ||
e2803273 TT |
2558 | namespace expr |
2559 | { | |
2560 | ||
2561 | value * | |
2562 | operation::evaluate_for_cast (struct type *expect_type, | |
2563 | struct expression *exp, | |
2564 | enum noside noside) | |
2565 | { | |
2566 | value *val = evaluate (expect_type, exp, noside); | |
2567 | if (noside == EVAL_SKIP) | |
2568 | return eval_skip_value (exp); | |
2569 | return value_cast (expect_type, val); | |
2570 | } | |
2571 | ||
2572 | value * | |
2573 | operation::evaluate_for_address (struct expression *exp, enum noside noside) | |
2574 | { | |
2575 | value *val = evaluate (nullptr, exp, noside); | |
2576 | return evaluate_subexp_for_address_base (exp, noside, val); | |
2577 | } | |
2578 | ||
d5ab122c TT |
2579 | value * |
2580 | scope_operation::evaluate_for_address (struct expression *exp, | |
2581 | enum noside noside) | |
2582 | { | |
2583 | value *x = value_aggregate_elt (std::get<0> (m_storage), | |
2584 | std::get<1> (m_storage).c_str (), | |
2585 | NULL, 1, noside); | |
2586 | if (x == NULL) | |
2587 | error (_("There is no field named %s"), std::get<1> (m_storage).c_str ()); | |
2588 | return x; | |
2589 | } | |
2590 | ||
876469ff TT |
2591 | value * |
2592 | unop_ind_base_operation::evaluate_for_address (struct expression *exp, | |
2593 | enum noside noside) | |
2594 | { | |
2595 | value *x = std::get<0> (m_storage)->evaluate (nullptr, exp, noside); | |
2596 | ||
2597 | /* We can't optimize out "&*" if there's a user-defined operator*. */ | |
2598 | if (unop_user_defined_p (UNOP_IND, x)) | |
2599 | { | |
2600 | x = value_x_unop (x, UNOP_IND, noside); | |
2601 | return evaluate_subexp_for_address_base (exp, noside, x); | |
2602 | } | |
2603 | ||
2604 | return coerce_array (x); | |
2605 | } | |
2606 | ||
0c8effa3 TT |
2607 | value * |
2608 | var_msym_value_operation::evaluate_for_address (struct expression *exp, | |
2609 | enum noside noside) | |
2610 | { | |
2611 | value *val = evaluate_var_msym_value (noside, | |
2612 | std::get<1> (m_storage), | |
2613 | std::get<0> (m_storage)); | |
2614 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
2615 | { | |
2616 | struct type *type = lookup_pointer_type (value_type (val)); | |
2617 | return value_zero (type, not_lval); | |
2618 | } | |
2619 | else | |
2620 | return value_addr (val); | |
2621 | } | |
2622 | ||
cbc18219 TT |
2623 | value * |
2624 | unop_memval_operation::evaluate_for_address (struct expression *exp, | |
2625 | enum noside noside) | |
2626 | { | |
2627 | return value_cast (lookup_pointer_type (std::get<1> (m_storage)), | |
2628 | std::get<0> (m_storage)->evaluate (nullptr, exp, noside)); | |
2629 | } | |
2630 | ||
2631 | value * | |
2632 | unop_memval_type_operation::evaluate_for_address (struct expression *exp, | |
2633 | enum noside noside) | |
2634 | { | |
2635 | value *typeval = std::get<0> (m_storage)->evaluate (nullptr, exp, | |
2636 | EVAL_AVOID_SIDE_EFFECTS); | |
2637 | struct type *type = value_type (typeval); | |
2638 | return value_cast (lookup_pointer_type (type), | |
2639 | std::get<1> (m_storage)->evaluate (nullptr, exp, noside)); | |
2640 | } | |
2641 | ||
e82a5afc TT |
2642 | value * |
2643 | var_value_operation::evaluate_for_address (struct expression *exp, | |
2644 | enum noside noside) | |
2645 | { | |
2646 | symbol *var = std::get<0> (m_storage); | |
2647 | ||
2648 | /* C++: The "address" of a reference should yield the address | |
2649 | * of the object pointed to. Let value_addr() deal with it. */ | |
2650 | if (TYPE_IS_REFERENCE (SYMBOL_TYPE (var))) | |
2651 | return operation::evaluate_for_address (exp, noside); | |
2652 | ||
2653 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
2654 | { | |
2655 | struct type *type = lookup_pointer_type (SYMBOL_TYPE (var)); | |
2656 | enum address_class sym_class = SYMBOL_CLASS (var); | |
2657 | ||
2658 | if (sym_class == LOC_CONST | |
2659 | || sym_class == LOC_CONST_BYTES | |
2660 | || sym_class == LOC_REGISTER) | |
2661 | error (_("Attempt to take address of register or constant.")); | |
2662 | ||
2663 | return value_zero (type, not_lval); | |
2664 | } | |
2665 | else | |
2666 | return address_of_variable (var, std::get<1> (m_storage)); | |
2667 | } | |
2668 | ||
2669 | value * | |
2670 | var_value_operation::evaluate_with_coercion (struct expression *exp, | |
2671 | enum noside noside) | |
2672 | { | |
2673 | struct symbol *var = std::get<0> (m_storage); | |
2674 | struct type *type = check_typedef (SYMBOL_TYPE (var)); | |
2675 | if (type->code () == TYPE_CODE_ARRAY | |
2676 | && !type->is_vector () | |
2677 | && CAST_IS_CONVERSION (exp->language_defn)) | |
2678 | { | |
2679 | struct value *val = address_of_variable (var, std::get<1> (m_storage)); | |
2680 | return value_cast (lookup_pointer_type (TYPE_TARGET_TYPE (type)), val); | |
2681 | } | |
2682 | return evaluate (nullptr, exp, noside); | |
2683 | } | |
2684 | ||
2685 | } | |
2686 | ||
13ea014a TT |
2687 | /* Helper function for evaluating the size of a type. */ |
2688 | ||
2689 | static value * | |
2690 | evaluate_subexp_for_sizeof_base (struct expression *exp, struct type *type) | |
2691 | { | |
2692 | /* FIXME: This should be size_t. */ | |
2693 | struct type *size_type = builtin_type (exp->gdbarch)->builtin_int; | |
2694 | /* $5.3.3/2 of the C++ Standard (n3290 draft) says of sizeof: | |
2695 | "When applied to a reference or a reference type, the result is | |
2696 | the size of the referenced type." */ | |
2697 | type = check_typedef (type); | |
2698 | if (exp->language_defn->la_language == language_cplus | |
2699 | && (TYPE_IS_REFERENCE (type))) | |
2700 | type = check_typedef (TYPE_TARGET_TYPE (type)); | |
2701 | return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type)); | |
2702 | } | |
2703 | ||
e2803273 TT |
2704 | namespace expr |
2705 | { | |
2706 | ||
2707 | value * | |
2708 | operation::evaluate_for_sizeof (struct expression *exp, enum noside noside) | |
2709 | { | |
2710 | value *val = evaluate (nullptr, exp, EVAL_AVOID_SIDE_EFFECTS); | |
2711 | return evaluate_subexp_for_sizeof_base (exp, value_type (val)); | |
2712 | } | |
2713 | ||
0c8effa3 TT |
2714 | value * |
2715 | var_msym_value_operation::evaluate_for_sizeof (struct expression *exp, | |
2716 | enum noside noside) | |
2717 | ||
2718 | { | |
2719 | minimal_symbol *msymbol = std::get<0> (m_storage); | |
2720 | value *mval = evaluate_var_msym_value (noside, | |
2721 | std::get<1> (m_storage), | |
2722 | msymbol); | |
2723 | ||
2724 | struct type *type = value_type (mval); | |
2725 | if (type->code () == TYPE_CODE_ERROR) | |
2726 | error_unknown_type (msymbol->print_name ()); | |
2727 | ||
2728 | /* FIXME: This should be size_t. */ | |
2729 | struct type *size_type = builtin_type (exp->gdbarch)->builtin_int; | |
2730 | return value_from_longest (size_type, TYPE_LENGTH (type)); | |
2731 | } | |
2732 | ||
224d6424 TT |
2733 | value * |
2734 | subscript_operation::evaluate_for_sizeof (struct expression *exp, | |
2735 | enum noside noside) | |
2736 | { | |
2737 | if (noside == EVAL_NORMAL) | |
2738 | { | |
2739 | value *val = std::get<0> (m_storage)->evaluate (nullptr, exp, | |
2740 | EVAL_AVOID_SIDE_EFFECTS); | |
2741 | struct type *type = check_typedef (value_type (val)); | |
2742 | if (type->code () == TYPE_CODE_ARRAY) | |
2743 | { | |
2744 | type = check_typedef (TYPE_TARGET_TYPE (type)); | |
2745 | if (type->code () == TYPE_CODE_ARRAY) | |
2746 | { | |
2747 | type = type->index_type (); | |
2748 | /* Only re-evaluate the right hand side if the resulting type | |
2749 | is a variable length type. */ | |
2750 | if (type->bounds ()->flag_bound_evaluated) | |
2751 | { | |
2752 | val = evaluate (nullptr, exp, EVAL_NORMAL); | |
2753 | /* FIXME: This should be size_t. */ | |
2754 | struct type *size_type | |
2755 | = builtin_type (exp->gdbarch)->builtin_int; | |
2756 | return value_from_longest | |
2757 | (size_type, (LONGEST) TYPE_LENGTH (value_type (val))); | |
2758 | } | |
2759 | } | |
2760 | } | |
2761 | } | |
2762 | ||
2763 | return operation::evaluate_for_sizeof (exp, noside); | |
2764 | } | |
2765 | ||
876469ff TT |
2766 | value * |
2767 | unop_ind_base_operation::evaluate_for_sizeof (struct expression *exp, | |
2768 | enum noside noside) | |
2769 | { | |
2770 | value *val = std::get<0> (m_storage)->evaluate (nullptr, exp, | |
2771 | EVAL_AVOID_SIDE_EFFECTS); | |
2772 | struct type *type = check_typedef (value_type (val)); | |
2773 | if (type->code () != TYPE_CODE_PTR | |
2774 | && !TYPE_IS_REFERENCE (type) | |
2775 | && type->code () != TYPE_CODE_ARRAY) | |
2776 | error (_("Attempt to take contents of a non-pointer value.")); | |
2777 | type = TYPE_TARGET_TYPE (type); | |
2778 | if (is_dynamic_type (type)) | |
2779 | type = value_type (value_ind (val)); | |
2780 | /* FIXME: This should be size_t. */ | |
2781 | struct type *size_type = builtin_type (exp->gdbarch)->builtin_int; | |
2782 | return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type)); | |
2783 | } | |
2784 | ||
cbc18219 TT |
2785 | value * |
2786 | unop_memval_operation::evaluate_for_sizeof (struct expression *exp, | |
2787 | enum noside noside) | |
2788 | { | |
2789 | return evaluate_subexp_for_sizeof_base (exp, std::get<1> (m_storage)); | |
2790 | } | |
2791 | ||
2792 | value * | |
2793 | unop_memval_type_operation::evaluate_for_sizeof (struct expression *exp, | |
2794 | enum noside noside) | |
2795 | { | |
2796 | value *typeval = std::get<0> (m_storage)->evaluate (nullptr, exp, | |
2797 | EVAL_AVOID_SIDE_EFFECTS); | |
2798 | return evaluate_subexp_for_sizeof_base (exp, value_type (typeval)); | |
2799 | } | |
2800 | ||
e82a5afc TT |
2801 | value * |
2802 | var_value_operation::evaluate_for_sizeof (struct expression *exp, | |
2803 | enum noside noside) | |
2804 | { | |
2805 | struct type *type = SYMBOL_TYPE (std::get<0> (m_storage)); | |
2806 | if (is_dynamic_type (type)) | |
2807 | { | |
2808 | value *val = evaluate (nullptr, exp, EVAL_NORMAL); | |
2809 | type = value_type (val); | |
2810 | if (type->code () == TYPE_CODE_ARRAY) | |
2811 | { | |
2812 | /* FIXME: This should be size_t. */ | |
2813 | struct type *size_type = builtin_type (exp->gdbarch)->builtin_int; | |
2814 | if (type_not_allocated (type) || type_not_associated (type)) | |
2815 | return value_zero (size_type, not_lval); | |
2816 | else if (is_dynamic_type (type->index_type ()) | |
2817 | && type->bounds ()->high.kind () == PROP_UNDEFINED) | |
2818 | return allocate_optimized_out_value (size_type); | |
2819 | } | |
2820 | } | |
2821 | return evaluate_subexp_for_sizeof_base (exp, type); | |
2822 | } | |
2823 | ||
0c8effa3 TT |
2824 | value * |
2825 | var_msym_value_operation::evaluate_for_cast (struct type *to_type, | |
2826 | struct expression *exp, | |
2827 | enum noside noside) | |
2828 | { | |
2829 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
2830 | return value_zero (to_type, not_lval); | |
2831 | ||
2832 | value *val = evaluate_var_msym_value (noside, | |
2833 | std::get<1> (m_storage), | |
2834 | std::get<0> (m_storage)); | |
2835 | ||
2836 | if (noside == EVAL_SKIP) | |
2837 | return eval_skip_value (exp); | |
2838 | ||
2839 | val = value_cast (to_type, val); | |
2840 | ||
2841 | /* Don't allow e.g. '&(int)var_with_no_debug_info'. */ | |
2842 | if (VALUE_LVAL (val) == lval_memory) | |
2843 | { | |
2844 | if (value_lazy (val)) | |
2845 | value_fetch_lazy (val); | |
2846 | VALUE_LVAL (val) = not_lval; | |
2847 | } | |
2848 | return val; | |
2849 | } | |
2850 | ||
e82a5afc TT |
2851 | value * |
2852 | var_value_operation::evaluate_for_cast (struct type *to_type, | |
2853 | struct expression *exp, | |
2854 | enum noside noside) | |
2855 | { | |
2856 | value *val = evaluate_var_value (noside, | |
2857 | std::get<1> (m_storage), | |
2858 | std::get<0> (m_storage)); | |
2859 | ||
2860 | if (noside == EVAL_SKIP) | |
2861 | return eval_skip_value (exp); | |
2862 | ||
2863 | val = value_cast (to_type, val); | |
2864 | ||
2865 | /* Don't allow e.g. '&(int)var_with_no_debug_info'. */ | |
2866 | if (VALUE_LVAL (val) == lval_memory) | |
2867 | { | |
2868 | if (value_lazy (val)) | |
2869 | value_fetch_lazy (val); | |
2870 | VALUE_LVAL (val) = not_lval; | |
2871 | } | |
2872 | return val; | |
2873 | } | |
2874 | ||
0c8effa3 TT |
2875 | } |
2876 | ||
0963b4bd | 2877 | /* Parse a type expression in the string [P..P+LENGTH). */ |
c906108c SS |
2878 | |
2879 | struct type * | |
f5756acc | 2880 | parse_and_eval_type (const char *p, int length) |
c906108c | 2881 | { |
c5aa993b | 2882 | char *tmp = (char *) alloca (length + 4); |
d7f9d729 | 2883 | |
c5aa993b JM |
2884 | tmp[0] = '('; |
2885 | memcpy (tmp + 1, p, length); | |
2886 | tmp[length + 1] = ')'; | |
2887 | tmp[length + 2] = '0'; | |
2888 | tmp[length + 3] = '\0'; | |
4d01a485 | 2889 | expression_up expr = parse_expression (tmp); |
1eaebe02 TT |
2890 | expr::unop_cast_operation *op |
2891 | = dynamic_cast<expr::unop_cast_operation *> (expr->op.get ()); | |
2892 | if (op == nullptr) | |
8a3fe4f8 | 2893 | error (_("Internal error in eval_type.")); |
1eaebe02 | 2894 | return op->get_type (); |
c906108c | 2895 | } |