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 | ||
6d816919 | 604 | /* See expression.h. */ |
e69570ee | 605 | |
6d816919 AB |
606 | value * |
607 | evaluate_subexp_do_call (expression *exp, enum noside noside, | |
1ab8280d TT |
608 | value *callee, |
609 | gdb::array_view<value *> argvec, | |
6d816919 AB |
610 | const char *function_name, |
611 | type *default_return_type) | |
e69570ee | 612 | { |
1ab8280d | 613 | if (callee == NULL) |
e69570ee PA |
614 | error (_("Cannot evaluate function -- may be inlined")); |
615 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
616 | { | |
617 | /* If the return type doesn't look like a function type, | |
618 | call an error. This can happen if somebody tries to turn | |
619 | a variable into a function call. */ | |
620 | ||
1ab8280d | 621 | type *ftype = value_type (callee); |
e69570ee | 622 | |
78134374 | 623 | if (ftype->code () == TYPE_CODE_INTERNAL_FUNCTION) |
e69570ee PA |
624 | { |
625 | /* We don't know anything about what the internal | |
626 | function might return, but we have to return | |
627 | something. */ | |
628 | return value_zero (builtin_type (exp->gdbarch)->builtin_int, | |
629 | not_lval); | |
630 | } | |
78134374 | 631 | else if (ftype->code () == TYPE_CODE_XMETHOD) |
e69570ee | 632 | { |
1ab8280d | 633 | type *return_type = result_type_of_xmethod (callee, argvec); |
e69570ee PA |
634 | |
635 | if (return_type == NULL) | |
636 | error (_("Xmethod is missing return type.")); | |
637 | return value_zero (return_type, not_lval); | |
638 | } | |
78134374 SM |
639 | else if (ftype->code () == TYPE_CODE_FUNC |
640 | || ftype->code () == TYPE_CODE_METHOD) | |
e69570ee | 641 | { |
0becda7a | 642 | if (ftype->is_gnu_ifunc ()) |
8388016d | 643 | { |
1ab8280d | 644 | CORE_ADDR address = value_address (callee); |
8388016d PA |
645 | type *resolved_type = find_gnu_ifunc_target_type (address); |
646 | ||
647 | if (resolved_type != NULL) | |
648 | ftype = resolved_type; | |
649 | } | |
650 | ||
e69570ee PA |
651 | type *return_type = TYPE_TARGET_TYPE (ftype); |
652 | ||
653 | if (return_type == NULL) | |
654 | return_type = default_return_type; | |
655 | ||
656 | if (return_type == NULL) | |
657 | error_call_unknown_return_type (function_name); | |
658 | ||
659 | return allocate_value (return_type); | |
660 | } | |
661 | else | |
662 | error (_("Expression of type other than " | |
663 | "\"Function returning ...\" used as function")); | |
664 | } | |
1ab8280d | 665 | switch (value_type (callee)->code ()) |
e69570ee PA |
666 | { |
667 | case TYPE_CODE_INTERNAL_FUNCTION: | |
668 | return call_internal_function (exp->gdbarch, exp->language_defn, | |
1ab8280d | 669 | callee, argvec.size (), argvec.data ()); |
e69570ee | 670 | case TYPE_CODE_XMETHOD: |
1ab8280d | 671 | return call_xmethod (callee, argvec); |
e69570ee | 672 | default: |
1ab8280d | 673 | return call_function_by_hand (callee, default_return_type, argvec); |
e69570ee PA |
674 | } |
675 | } | |
676 | ||
a00b7254 TT |
677 | namespace expr |
678 | { | |
679 | ||
680 | value * | |
681 | operation::evaluate_funcall (struct type *expect_type, | |
682 | struct expression *exp, | |
683 | enum noside noside, | |
684 | const char *function_name, | |
685 | const std::vector<operation_up> &args) | |
686 | { | |
687 | std::vector<value *> vals (args.size ()); | |
688 | ||
689 | value *callee = evaluate_with_coercion (exp, noside); | |
690 | for (int i = 0; i < args.size (); ++i) | |
691 | vals[i] = args[i]->evaluate_with_coercion (exp, noside); | |
692 | ||
693 | return evaluate_subexp_do_call (exp, noside, callee, vals, | |
694 | function_name, expect_type); | |
695 | } | |
696 | ||
697 | value * | |
698 | var_value_operation::evaluate_funcall (struct type *expect_type, | |
699 | struct expression *exp, | |
700 | enum noside noside, | |
701 | const std::vector<operation_up> &args) | |
702 | { | |
703 | if (!overload_resolution | |
704 | || exp->language_defn->la_language != language_cplus) | |
705 | return operation::evaluate_funcall (expect_type, exp, noside, args); | |
706 | ||
707 | std::vector<value *> argvec (args.size ()); | |
708 | for (int i = 0; i < args.size (); ++i) | |
709 | argvec[i] = args[i]->evaluate_with_coercion (exp, noside); | |
710 | ||
711 | struct symbol *symp; | |
712 | find_overload_match (argvec, NULL, NON_METHOD, | |
713 | NULL, std::get<0> (m_storage), | |
714 | NULL, &symp, NULL, 0, noside); | |
715 | ||
716 | if (SYMBOL_TYPE (symp)->code () == TYPE_CODE_ERROR) | |
717 | error_unknown_type (symp->print_name ()); | |
718 | value *callee = evaluate_var_value (noside, std::get<1> (m_storage), symp); | |
719 | ||
720 | return evaluate_subexp_do_call (exp, noside, callee, argvec, | |
721 | nullptr, expect_type); | |
722 | } | |
723 | ||
724 | value * | |
725 | scope_operation::evaluate_funcall (struct type *expect_type, | |
726 | struct expression *exp, | |
727 | enum noside noside, | |
728 | const std::vector<operation_up> &args) | |
729 | { | |
730 | if (!overload_resolution | |
731 | || exp->language_defn->la_language != language_cplus) | |
732 | return operation::evaluate_funcall (expect_type, exp, noside, args); | |
733 | ||
734 | /* Unpack it locally so we can properly handle overload | |
735 | resolution. */ | |
736 | const std::string &name = std::get<1> (m_storage); | |
737 | struct type *type = std::get<0> (m_storage); | |
738 | ||
739 | symbol *function = NULL; | |
740 | const char *function_name = NULL; | |
741 | std::vector<value *> argvec (1 + args.size ()); | |
742 | if (type->code () == TYPE_CODE_NAMESPACE) | |
743 | { | |
744 | function = cp_lookup_symbol_namespace (type->name (), | |
745 | name.c_str (), | |
746 | get_selected_block (0), | |
747 | VAR_DOMAIN).symbol; | |
748 | if (function == NULL) | |
749 | error (_("No symbol \"%s\" in namespace \"%s\"."), | |
750 | name.c_str (), type->name ()); | |
751 | } | |
752 | else | |
753 | { | |
754 | gdb_assert (type->code () == TYPE_CODE_STRUCT | |
755 | || type->code () == TYPE_CODE_UNION); | |
756 | function_name = name.c_str (); | |
757 | ||
758 | /* We need a properly typed value for method lookup. */ | |
759 | argvec[0] = value_zero (type, lval_memory); | |
760 | } | |
761 | ||
762 | for (int i = 0; i < args.size (); ++i) | |
763 | argvec[i + 1] = args[i]->evaluate_with_coercion (exp, noside); | |
764 | gdb::array_view<value *> arg_view = argvec; | |
765 | ||
766 | value *callee = nullptr; | |
767 | if (function_name != nullptr) | |
768 | { | |
769 | int static_memfuncp; | |
770 | ||
771 | find_overload_match (arg_view, function_name, METHOD, | |
772 | &argvec[0], nullptr, &callee, nullptr, | |
773 | &static_memfuncp, 0, noside); | |
774 | if (!static_memfuncp) | |
775 | { | |
776 | /* For the time being, we don't handle this. */ | |
777 | error (_("Call to overloaded function %s requires " | |
778 | "`this' pointer"), | |
779 | function_name); | |
780 | } | |
781 | ||
782 | arg_view = arg_view.slice (1); | |
783 | } | |
784 | else | |
785 | { | |
786 | symbol *symp; | |
787 | arg_view = arg_view.slice (1); | |
788 | find_overload_match (arg_view, nullptr, | |
789 | NON_METHOD, nullptr, function, | |
790 | nullptr, &symp, nullptr, 1, noside); | |
791 | callee = value_of_variable (symp, get_selected_block (0)); | |
792 | } | |
793 | ||
794 | return evaluate_subexp_do_call (exp, noside, callee, arg_view, | |
795 | nullptr, expect_type); | |
796 | } | |
797 | ||
798 | value * | |
799 | structop_member_base::evaluate_funcall (struct type *expect_type, | |
800 | struct expression *exp, | |
801 | enum noside noside, | |
802 | const std::vector<operation_up> &args) | |
803 | { | |
804 | /* First, evaluate the structure into lhs. */ | |
805 | value *lhs; | |
806 | if (opcode () == STRUCTOP_MEMBER) | |
807 | lhs = std::get<0> (m_storage)->evaluate_for_address (exp, noside); | |
808 | else | |
809 | lhs = std::get<0> (m_storage)->evaluate (nullptr, exp, noside); | |
810 | ||
811 | std::vector<value *> vals (args.size () + 1); | |
812 | gdb::array_view<value *> val_view = vals; | |
813 | /* If the function is a virtual function, then the aggregate | |
814 | value (providing the structure) plays its part by providing | |
815 | the vtable. Otherwise, it is just along for the ride: call | |
816 | the function directly. */ | |
817 | value *rhs = std::get<1> (m_storage)->evaluate (nullptr, exp, noside); | |
818 | value *callee; | |
819 | ||
820 | type *a1_type = check_typedef (value_type (rhs)); | |
821 | if (a1_type->code () == TYPE_CODE_METHODPTR) | |
822 | { | |
823 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
824 | callee = value_zero (TYPE_TARGET_TYPE (a1_type), not_lval); | |
825 | else | |
826 | callee = cplus_method_ptr_to_value (&lhs, rhs); | |
827 | ||
828 | vals[0] = lhs; | |
829 | } | |
830 | else if (a1_type->code () == TYPE_CODE_MEMBERPTR) | |
831 | { | |
832 | struct type *type_ptr | |
833 | = lookup_pointer_type (TYPE_SELF_TYPE (a1_type)); | |
834 | struct type *target_type_ptr | |
835 | = lookup_pointer_type (TYPE_TARGET_TYPE (a1_type)); | |
836 | ||
837 | /* Now, convert this value to an address. */ | |
838 | lhs = value_cast (type_ptr, lhs); | |
839 | ||
840 | long mem_offset = value_as_long (rhs); | |
841 | ||
842 | callee = value_from_pointer (target_type_ptr, | |
843 | value_as_long (lhs) + mem_offset); | |
844 | callee = value_ind (callee); | |
845 | ||
846 | val_view = val_view.slice (1); | |
847 | } | |
848 | else | |
849 | error (_("Non-pointer-to-member value used in pointer-to-member " | |
850 | "construct")); | |
851 | ||
852 | for (int i = 0; i < args.size (); ++i) | |
853 | vals[i + 1] = args[i]->evaluate_with_coercion (exp, noside); | |
854 | ||
855 | return evaluate_subexp_do_call (exp, noside, callee, val_view, | |
856 | nullptr, expect_type); | |
857 | ||
858 | } | |
859 | ||
860 | value * | |
861 | structop_base_operation::evaluate_funcall | |
862 | (struct type *expect_type, struct expression *exp, enum noside noside, | |
863 | const std::vector<operation_up> &args) | |
864 | { | |
865 | std::vector<value *> vals (args.size () + 1); | |
866 | /* First, evaluate the structure into vals[0]. */ | |
867 | enum exp_opcode op = opcode (); | |
868 | if (op == STRUCTOP_STRUCT) | |
869 | { | |
870 | /* If v is a variable in a register, and the user types | |
871 | v.method (), this will produce an error, because v has no | |
872 | address. | |
873 | ||
874 | A possible way around this would be to allocate a copy of | |
875 | the variable on the stack, copy in the contents, call the | |
876 | function, and copy out the contents. I.e. convert this | |
877 | from call by reference to call by copy-return (or | |
878 | whatever it's called). However, this does not work | |
879 | because it is not the same: the method being called could | |
880 | stash a copy of the address, and then future uses through | |
881 | that address (after the method returns) would be expected | |
882 | to use the variable itself, not some copy of it. */ | |
883 | vals[0] = std::get<0> (m_storage)->evaluate_for_address (exp, noside); | |
884 | } | |
885 | else | |
886 | { | |
887 | vals[0] = std::get<0> (m_storage)->evaluate (nullptr, exp, noside); | |
888 | /* Check to see if the operator '->' has been overloaded. | |
889 | If the operator has been overloaded replace vals[0] with the | |
890 | value returned by the custom operator and continue | |
891 | evaluation. */ | |
892 | while (unop_user_defined_p (op, vals[0])) | |
893 | { | |
894 | struct value *value = nullptr; | |
895 | try | |
896 | { | |
897 | value = value_x_unop (vals[0], op, noside); | |
898 | } | |
899 | catch (const gdb_exception_error &except) | |
900 | { | |
901 | if (except.error == NOT_FOUND_ERROR) | |
902 | break; | |
903 | else | |
904 | throw; | |
905 | } | |
906 | ||
907 | vals[0] = value; | |
908 | } | |
909 | } | |
910 | ||
911 | for (int i = 0; i < args.size (); ++i) | |
912 | vals[i + 1] = args[i]->evaluate_with_coercion (exp, noside); | |
913 | gdb::array_view<value *> arg_view = vals; | |
914 | ||
915 | int static_memfuncp; | |
916 | value *callee; | |
917 | const char *tstr = std::get<1> (m_storage).c_str (); | |
918 | if (overload_resolution | |
919 | && exp->language_defn->la_language == language_cplus) | |
920 | { | |
921 | /* Language is C++, do some overload resolution before | |
922 | evaluation. */ | |
923 | value *val0 = vals[0]; | |
924 | find_overload_match (arg_view, tstr, METHOD, | |
925 | &val0, nullptr, &callee, nullptr, | |
926 | &static_memfuncp, 0, noside); | |
927 | vals[0] = val0; | |
928 | } | |
929 | else | |
930 | /* Non-C++ case -- or no overload resolution. */ | |
931 | { | |
932 | struct value *temp = vals[0]; | |
933 | ||
934 | callee = value_struct_elt (&temp, &vals[1], tstr, | |
935 | &static_memfuncp, | |
936 | op == STRUCTOP_STRUCT | |
937 | ? "structure" : "structure pointer"); | |
938 | /* value_struct_elt updates temp with the correct value of the | |
939 | ``this'' pointer if necessary, so modify it to reflect any | |
940 | ``this'' changes. */ | |
941 | vals[0] = value_from_longest (lookup_pointer_type (value_type (temp)), | |
942 | value_address (temp) | |
943 | + value_embedded_offset (temp)); | |
944 | } | |
945 | ||
946 | /* Take out `this' if needed. */ | |
947 | if (static_memfuncp) | |
948 | arg_view = arg_view.slice (1); | |
949 | ||
950 | return evaluate_subexp_do_call (exp, noside, callee, arg_view, | |
951 | nullptr, expect_type); | |
952 | } | |
953 | ||
954 | ||
955 | } /* namespace expr */ | |
956 | ||
60e22c1e HD |
957 | /* Return true if type is integral or reference to integral */ |
958 | ||
959 | static bool | |
960 | is_integral_or_integral_reference (struct type *type) | |
961 | { | |
962 | if (is_integral_type (type)) | |
963 | return true; | |
964 | ||
965 | type = check_typedef (type); | |
966 | return (type != nullptr | |
967 | && TYPE_IS_REFERENCE (type) | |
968 | && is_integral_type (TYPE_TARGET_TYPE (type))); | |
969 | } | |
970 | ||
ea2d29f7 TT |
971 | /* Helper function that implements the body of OP_SCOPE. */ |
972 | ||
d5ab122c | 973 | struct value * |
ea2d29f7 TT |
974 | eval_op_scope (struct type *expect_type, struct expression *exp, |
975 | enum noside noside, | |
976 | struct type *type, const char *string) | |
977 | { | |
ea2d29f7 TT |
978 | struct value *arg1 = value_aggregate_elt (type, string, expect_type, |
979 | 0, noside); | |
980 | if (arg1 == NULL) | |
981 | error (_("There is no field named %s"), string); | |
982 | return arg1; | |
983 | } | |
984 | ||
50b98adc TT |
985 | /* Helper function that implements the body of OP_VAR_ENTRY_VALUE. */ |
986 | ||
b5cc3923 | 987 | struct value * |
50b98adc TT |
988 | eval_op_var_entry_value (struct type *expect_type, struct expression *exp, |
989 | enum noside noside, symbol *sym) | |
990 | { | |
50b98adc TT |
991 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
992 | return value_zero (SYMBOL_TYPE (sym), not_lval); | |
993 | ||
994 | if (SYMBOL_COMPUTED_OPS (sym) == NULL | |
995 | || SYMBOL_COMPUTED_OPS (sym)->read_variable_at_entry == NULL) | |
996 | error (_("Symbol \"%s\" does not have any specific entry value"), | |
997 | sym->print_name ()); | |
998 | ||
999 | struct frame_info *frame = get_selected_frame (NULL); | |
1000 | return SYMBOL_COMPUTED_OPS (sym)->read_variable_at_entry (sym, frame); | |
1001 | } | |
1002 | ||
c0df9289 TT |
1003 | /* Helper function that implements the body of OP_VAR_MSYM_VALUE. */ |
1004 | ||
0c8effa3 | 1005 | struct value * |
c0df9289 TT |
1006 | eval_op_var_msym_value (struct type *expect_type, struct expression *exp, |
1007 | enum noside noside, bool outermost_p, | |
9c79936b | 1008 | bound_minimal_symbol msymbol) |
c0df9289 | 1009 | { |
9c79936b TT |
1010 | value *val = evaluate_var_msym_value (noside, msymbol.objfile, |
1011 | msymbol.minsym); | |
c0df9289 TT |
1012 | |
1013 | struct type *type = value_type (val); | |
1014 | if (type->code () == TYPE_CODE_ERROR | |
1015 | && (noside != EVAL_AVOID_SIDE_EFFECTS || !outermost_p)) | |
9c79936b | 1016 | error_unknown_type (msymbol.minsym->print_name ()); |
c0df9289 TT |
1017 | return val; |
1018 | } | |
1019 | ||
9b1d8af6 TT |
1020 | /* Helper function that implements the body of OP_FUNC_STATIC_VAR. */ |
1021 | ||
17679395 | 1022 | struct value * |
9b1d8af6 TT |
1023 | eval_op_func_static_var (struct type *expect_type, struct expression *exp, |
1024 | enum noside noside, | |
1025 | value *func, const char *var) | |
1026 | { | |
9b1d8af6 TT |
1027 | CORE_ADDR addr = value_address (func); |
1028 | const block *blk = block_for_pc (addr); | |
1029 | struct block_symbol sym = lookup_symbol (var, blk, VAR_DOMAIN, NULL); | |
1030 | if (sym.symbol == NULL) | |
1031 | error (_("No symbol \"%s\" in specified context."), var); | |
1032 | return evaluate_var_value (noside, sym.block, sym.symbol); | |
1033 | } | |
1034 | ||
ffff730b TT |
1035 | /* Helper function that implements the body of OP_REGISTER. */ |
1036 | ||
55bdbff8 | 1037 | struct value * |
ffff730b TT |
1038 | eval_op_register (struct type *expect_type, struct expression *exp, |
1039 | enum noside noside, const char *name) | |
1040 | { | |
1041 | int regno; | |
1042 | struct value *val; | |
1043 | ||
1044 | regno = user_reg_map_name_to_regnum (exp->gdbarch, | |
1045 | name, strlen (name)); | |
1046 | if (regno == -1) | |
1047 | error (_("Register $%s not available."), name); | |
1048 | ||
1049 | /* In EVAL_AVOID_SIDE_EFFECTS mode, we only need to return | |
1050 | a value with the appropriate register type. Unfortunately, | |
1051 | we don't have easy access to the type of user registers. | |
1052 | So for these registers, we fetch the register value regardless | |
1053 | of the evaluation mode. */ | |
1054 | if (noside == EVAL_AVOID_SIDE_EFFECTS | |
1055 | && regno < gdbarch_num_cooked_regs (exp->gdbarch)) | |
1056 | val = value_zero (register_type (exp->gdbarch, regno), not_lval); | |
1057 | else | |
1058 | val = value_of_register (regno, get_selected_frame (NULL)); | |
1059 | if (val == NULL) | |
1060 | error (_("Value of register %s not available."), name); | |
1061 | else | |
1062 | return val; | |
1063 | } | |
1064 | ||
14a1c64a TT |
1065 | /* Helper function that implements the body of OP_STRING. */ |
1066 | ||
b50db09f | 1067 | struct value * |
14a1c64a TT |
1068 | eval_op_string (struct type *expect_type, struct expression *exp, |
1069 | enum noside noside, int len, const char *string) | |
1070 | { | |
14a1c64a TT |
1071 | struct type *type = language_string_char_type (exp->language_defn, |
1072 | exp->gdbarch); | |
1073 | return value_string (string, len, type); | |
1074 | } | |
1075 | ||
f871bae1 TT |
1076 | /* Helper function that implements the body of OP_OBJC_SELECTOR. */ |
1077 | ||
09db3700 | 1078 | struct value * |
f871bae1 TT |
1079 | eval_op_objc_selector (struct type *expect_type, struct expression *exp, |
1080 | enum noside noside, | |
1081 | const char *sel) | |
1082 | { | |
f871bae1 TT |
1083 | struct type *selector_type = builtin_type (exp->gdbarch)->builtin_data_ptr; |
1084 | return value_from_longest (selector_type, | |
1085 | lookup_child_selector (exp->gdbarch, sel)); | |
1086 | } | |
1087 | ||
5c2f201e TT |
1088 | /* Helper function that implements the body of BINOP_CONCAT. */ |
1089 | ||
e51e26a0 | 1090 | struct value * |
5c2f201e | 1091 | eval_op_concat (struct type *expect_type, struct expression *exp, |
e51e26a0 | 1092 | enum noside noside, struct value *arg1, struct value *arg2) |
5c2f201e | 1093 | { |
e51e26a0 TT |
1094 | if (binop_user_defined_p (BINOP_CONCAT, arg1, arg2)) |
1095 | return value_x_binop (arg1, arg2, BINOP_CONCAT, OP_NULL, noside); | |
5c2f201e TT |
1096 | else |
1097 | return value_concat (arg1, arg2); | |
1098 | } | |
1099 | ||
f960a617 TT |
1100 | /* A helper function for TERNOP_SLICE. */ |
1101 | ||
1594e0bb | 1102 | struct value * |
f960a617 TT |
1103 | eval_op_ternop (struct type *expect_type, struct expression *exp, |
1104 | enum noside noside, | |
1105 | struct value *array, struct value *low, struct value *upper) | |
1106 | { | |
f960a617 TT |
1107 | int lowbound = value_as_long (low); |
1108 | int upperbound = value_as_long (upper); | |
1109 | return value_slice (array, lowbound, upperbound - lowbound + 1); | |
1110 | } | |
1111 | ||
3e96c4fc TT |
1112 | /* A helper function for STRUCTOP_STRUCT. */ |
1113 | ||
808b22cf | 1114 | struct value * |
3e96c4fc TT |
1115 | eval_op_structop_struct (struct type *expect_type, struct expression *exp, |
1116 | enum noside noside, | |
1117 | struct value *arg1, const char *string) | |
1118 | { | |
3e96c4fc TT |
1119 | struct value *arg3 = value_struct_elt (&arg1, NULL, string, |
1120 | NULL, "structure"); | |
1121 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1122 | arg3 = value_zero (value_type (arg3), VALUE_LVAL (arg3)); | |
1123 | return arg3; | |
1124 | } | |
1125 | ||
fb461aa3 TT |
1126 | /* A helper function for STRUCTOP_PTR. */ |
1127 | ||
ab0609be | 1128 | struct value * |
fb461aa3 | 1129 | eval_op_structop_ptr (struct type *expect_type, struct expression *exp, |
ab0609be | 1130 | enum noside noside, |
fb461aa3 TT |
1131 | struct value *arg1, const char *string) |
1132 | { | |
fb461aa3 TT |
1133 | /* Check to see if operator '->' has been overloaded. If so replace |
1134 | arg1 with the value returned by evaluating operator->(). */ | |
ab0609be | 1135 | while (unop_user_defined_p (STRUCTOP_PTR, arg1)) |
fb461aa3 TT |
1136 | { |
1137 | struct value *value = NULL; | |
1138 | try | |
1139 | { | |
ab0609be | 1140 | value = value_x_unop (arg1, STRUCTOP_PTR, noside); |
fb461aa3 TT |
1141 | } |
1142 | ||
1143 | catch (const gdb_exception_error &except) | |
1144 | { | |
1145 | if (except.error == NOT_FOUND_ERROR) | |
1146 | break; | |
1147 | else | |
1148 | throw; | |
1149 | } | |
1150 | ||
1151 | arg1 = value; | |
1152 | } | |
1153 | ||
1154 | /* JYG: if print object is on we need to replace the base type | |
1155 | with rtti type in order to continue on with successful | |
1156 | lookup of member / method only available in the rtti type. */ | |
1157 | { | |
1158 | struct type *arg_type = value_type (arg1); | |
1159 | struct type *real_type; | |
1160 | int full, using_enc; | |
1161 | LONGEST top; | |
1162 | struct value_print_options opts; | |
1163 | ||
1164 | get_user_print_options (&opts); | |
1165 | if (opts.objectprint && TYPE_TARGET_TYPE (arg_type) | |
1166 | && (TYPE_TARGET_TYPE (arg_type)->code () == TYPE_CODE_STRUCT)) | |
1167 | { | |
1168 | real_type = value_rtti_indirect_type (arg1, &full, &top, | |
1169 | &using_enc); | |
1170 | if (real_type) | |
1171 | arg1 = value_cast (real_type, arg1); | |
1172 | } | |
1173 | } | |
1174 | ||
1175 | struct value *arg3 = value_struct_elt (&arg1, NULL, string, | |
1176 | NULL, "structure pointer"); | |
1177 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1178 | arg3 = value_zero (value_type (arg3), VALUE_LVAL (arg3)); | |
1179 | return arg3; | |
1180 | } | |
1181 | ||
b7a96ed2 TT |
1182 | /* A helper function for STRUCTOP_MEMBER. */ |
1183 | ||
07f724a8 | 1184 | struct value * |
b7a96ed2 TT |
1185 | eval_op_member (struct type *expect_type, struct expression *exp, |
1186 | enum noside noside, | |
1187 | struct value *arg1, struct value *arg2) | |
1188 | { | |
1189 | long mem_offset; | |
1190 | ||
b7a96ed2 TT |
1191 | struct value *arg3; |
1192 | struct type *type = check_typedef (value_type (arg2)); | |
1193 | switch (type->code ()) | |
1194 | { | |
1195 | case TYPE_CODE_METHODPTR: | |
1196 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1197 | return value_zero (TYPE_TARGET_TYPE (type), not_lval); | |
1198 | else | |
1199 | { | |
1200 | arg2 = cplus_method_ptr_to_value (&arg1, arg2); | |
1201 | gdb_assert (value_type (arg2)->code () == TYPE_CODE_PTR); | |
1202 | return value_ind (arg2); | |
1203 | } | |
1204 | ||
1205 | case TYPE_CODE_MEMBERPTR: | |
1206 | /* Now, convert these values to an address. */ | |
1207 | arg1 = value_cast_pointers (lookup_pointer_type (TYPE_SELF_TYPE (type)), | |
1208 | arg1, 1); | |
1209 | ||
1210 | mem_offset = value_as_long (arg2); | |
1211 | ||
1212 | arg3 = value_from_pointer (lookup_pointer_type (TYPE_TARGET_TYPE (type)), | |
1213 | value_as_long (arg1) + mem_offset); | |
1214 | return value_ind (arg3); | |
1215 | ||
1216 | default: | |
1217 | error (_("non-pointer-to-member value used " | |
1218 | "in pointer-to-member construct")); | |
1219 | } | |
1220 | } | |
1221 | ||
aedaf9ac TT |
1222 | /* A helper function for BINOP_ADD. */ |
1223 | ||
a94323b6 | 1224 | struct value * |
aedaf9ac | 1225 | eval_op_add (struct type *expect_type, struct expression *exp, |
a94323b6 | 1226 | enum noside noside, |
aedaf9ac TT |
1227 | struct value *arg1, struct value *arg2) |
1228 | { | |
a94323b6 TT |
1229 | if (binop_user_defined_p (BINOP_ADD, arg1, arg2)) |
1230 | return value_x_binop (arg1, arg2, BINOP_ADD, OP_NULL, noside); | |
aedaf9ac TT |
1231 | else if (ptrmath_type_p (exp->language_defn, value_type (arg1)) |
1232 | && is_integral_or_integral_reference (value_type (arg2))) | |
1233 | return value_ptradd (arg1, value_as_long (arg2)); | |
1234 | else if (ptrmath_type_p (exp->language_defn, value_type (arg2)) | |
1235 | && is_integral_or_integral_reference (value_type (arg1))) | |
1236 | return value_ptradd (arg2, value_as_long (arg1)); | |
1237 | else | |
1238 | { | |
1239 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
1240 | return value_binop (arg1, arg2, BINOP_ADD); | |
1241 | } | |
1242 | } | |
1243 | ||
d9790e22 TT |
1244 | /* A helper function for BINOP_SUB. */ |
1245 | ||
5133d78b | 1246 | struct value * |
d9790e22 | 1247 | eval_op_sub (struct type *expect_type, struct expression *exp, |
5133d78b | 1248 | enum noside noside, |
d9790e22 TT |
1249 | struct value *arg1, struct value *arg2) |
1250 | { | |
5133d78b TT |
1251 | if (binop_user_defined_p (BINOP_SUB, arg1, arg2)) |
1252 | return value_x_binop (arg1, arg2, BINOP_SUB, OP_NULL, noside); | |
d9790e22 TT |
1253 | else if (ptrmath_type_p (exp->language_defn, value_type (arg1)) |
1254 | && ptrmath_type_p (exp->language_defn, value_type (arg2))) | |
1255 | { | |
1256 | /* FIXME -- should be ptrdiff_t */ | |
1257 | struct type *type = builtin_type (exp->gdbarch)->builtin_long; | |
1258 | return value_from_longest (type, value_ptrdiff (arg1, arg2)); | |
1259 | } | |
1260 | else if (ptrmath_type_p (exp->language_defn, value_type (arg1)) | |
1261 | && is_integral_or_integral_reference (value_type (arg2))) | |
1262 | return value_ptradd (arg1, - value_as_long (arg2)); | |
1263 | else | |
1264 | { | |
1265 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
1266 | return value_binop (arg1, arg2, BINOP_SUB); | |
1267 | } | |
1268 | } | |
1269 | ||
7cdcdd02 TT |
1270 | /* Helper function for several different binary operations. */ |
1271 | ||
373907ff | 1272 | struct value * |
7cdcdd02 TT |
1273 | eval_op_binary (struct type *expect_type, struct expression *exp, |
1274 | enum noside noside, enum exp_opcode op, | |
1275 | struct value *arg1, struct value *arg2) | |
1276 | { | |
7cdcdd02 TT |
1277 | if (binop_user_defined_p (op, arg1, arg2)) |
1278 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); | |
1279 | else | |
1280 | { | |
1281 | /* If EVAL_AVOID_SIDE_EFFECTS and we're dividing by zero, | |
1282 | fudge arg2 to avoid division-by-zero, the caller is | |
1283 | (theoretically) only looking for the type of the result. */ | |
1284 | if (noside == EVAL_AVOID_SIDE_EFFECTS | |
1285 | /* ??? Do we really want to test for BINOP_MOD here? | |
1286 | The implementation of value_binop gives it a well-defined | |
1287 | value. */ | |
1288 | && (op == BINOP_DIV | |
1289 | || op == BINOP_INTDIV | |
1290 | || op == BINOP_REM | |
1291 | || op == BINOP_MOD) | |
1292 | && value_logical_not (arg2)) | |
1293 | { | |
1294 | struct value *v_one; | |
1295 | ||
1296 | v_one = value_one (value_type (arg2)); | |
1297 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &v_one); | |
1298 | return value_binop (arg1, v_one, op); | |
1299 | } | |
1300 | else | |
1301 | { | |
1302 | /* For shift and integer exponentiation operations, | |
1303 | only promote the first argument. */ | |
1304 | if ((op == BINOP_LSH || op == BINOP_RSH || op == BINOP_EXP) | |
1305 | && is_integral_type (value_type (arg2))) | |
1306 | unop_promote (exp->language_defn, exp->gdbarch, &arg1); | |
1307 | else | |
1308 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
1309 | ||
1310 | return value_binop (arg1, arg2, op); | |
1311 | } | |
1312 | } | |
1313 | } | |
1314 | ||
288d26bc TT |
1315 | /* A helper function for BINOP_SUBSCRIPT. */ |
1316 | ||
224d6424 | 1317 | struct value * |
288d26bc TT |
1318 | eval_op_subscript (struct type *expect_type, struct expression *exp, |
1319 | enum noside noside, enum exp_opcode op, | |
1320 | struct value *arg1, struct value *arg2) | |
1321 | { | |
288d26bc TT |
1322 | if (binop_user_defined_p (op, arg1, arg2)) |
1323 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); | |
1324 | else | |
1325 | { | |
1326 | /* If the user attempts to subscript something that is not an | |
1327 | array or pointer type (like a plain int variable for example), | |
1328 | then report this as an error. */ | |
1329 | ||
1330 | arg1 = coerce_ref (arg1); | |
1331 | struct type *type = check_typedef (value_type (arg1)); | |
1332 | if (type->code () != TYPE_CODE_ARRAY | |
1333 | && type->code () != TYPE_CODE_PTR) | |
1334 | { | |
1335 | if (type->name ()) | |
1336 | error (_("cannot subscript something of type `%s'"), | |
1337 | type->name ()); | |
1338 | else | |
1339 | error (_("cannot subscript requested type")); | |
1340 | } | |
1341 | ||
1342 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1343 | return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1)); | |
1344 | else | |
1345 | return value_subscript (arg1, value_as_long (arg2)); | |
1346 | } | |
1347 | } | |
1348 | ||
0cc96de8 TT |
1349 | /* A helper function for BINOP_EQUAL. */ |
1350 | ||
46916f2b | 1351 | struct value * |
0cc96de8 TT |
1352 | eval_op_equal (struct type *expect_type, struct expression *exp, |
1353 | enum noside noside, enum exp_opcode op, | |
1354 | struct value *arg1, struct value *arg2) | |
1355 | { | |
0cc96de8 TT |
1356 | if (binop_user_defined_p (op, arg1, arg2)) |
1357 | { | |
1358 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); | |
1359 | } | |
1360 | else | |
1361 | { | |
1362 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
1363 | int tem = value_equal (arg1, arg2); | |
1364 | struct type *type = language_bool_type (exp->language_defn, | |
1365 | exp->gdbarch); | |
1366 | return value_from_longest (type, (LONGEST) tem); | |
1367 | } | |
1368 | } | |
1369 | ||
1fcb3559 TT |
1370 | /* A helper function for BINOP_NOTEQUAL. */ |
1371 | ||
46916f2b | 1372 | struct value * |
1fcb3559 TT |
1373 | eval_op_notequal (struct type *expect_type, struct expression *exp, |
1374 | enum noside noside, enum exp_opcode op, | |
1375 | struct value *arg1, struct value *arg2) | |
1376 | { | |
1fcb3559 TT |
1377 | if (binop_user_defined_p (op, arg1, arg2)) |
1378 | { | |
1379 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); | |
1380 | } | |
1381 | else | |
1382 | { | |
1383 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
1384 | int tem = value_equal (arg1, arg2); | |
1385 | struct type *type = language_bool_type (exp->language_defn, | |
1386 | exp->gdbarch); | |
1387 | return value_from_longest (type, (LONGEST) ! tem); | |
1388 | } | |
1389 | } | |
1390 | ||
6cad1349 TT |
1391 | /* A helper function for BINOP_LESS. */ |
1392 | ||
46916f2b | 1393 | struct value * |
6cad1349 TT |
1394 | eval_op_less (struct type *expect_type, struct expression *exp, |
1395 | enum noside noside, enum exp_opcode op, | |
1396 | struct value *arg1, struct value *arg2) | |
1397 | { | |
6cad1349 TT |
1398 | if (binop_user_defined_p (op, arg1, arg2)) |
1399 | { | |
1400 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); | |
1401 | } | |
1402 | else | |
1403 | { | |
1404 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
1405 | int tem = value_less (arg1, arg2); | |
1406 | struct type *type = language_bool_type (exp->language_defn, | |
1407 | exp->gdbarch); | |
1408 | return value_from_longest (type, (LONGEST) tem); | |
1409 | } | |
1410 | } | |
1411 | ||
1f78d732 TT |
1412 | /* A helper function for BINOP_GTR. */ |
1413 | ||
46916f2b | 1414 | struct value * |
1f78d732 TT |
1415 | eval_op_gtr (struct type *expect_type, struct expression *exp, |
1416 | enum noside noside, enum exp_opcode op, | |
1417 | struct value *arg1, struct value *arg2) | |
1418 | { | |
1f78d732 TT |
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_less (arg2, arg1); | |
1427 | struct type *type = language_bool_type (exp->language_defn, | |
1428 | exp->gdbarch); | |
1429 | return value_from_longest (type, (LONGEST) tem); | |
1430 | } | |
1431 | } | |
1432 | ||
96e3efd9 TT |
1433 | /* A helper function for BINOP_GEQ. */ |
1434 | ||
46916f2b | 1435 | struct value * |
96e3efd9 TT |
1436 | eval_op_geq (struct type *expect_type, struct expression *exp, |
1437 | enum noside noside, enum exp_opcode op, | |
1438 | struct value *arg1, struct value *arg2) | |
1439 | { | |
96e3efd9 TT |
1440 | if (binop_user_defined_p (op, arg1, arg2)) |
1441 | { | |
1442 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); | |
1443 | } | |
1444 | else | |
1445 | { | |
1446 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
1447 | int tem = value_less (arg2, arg1) || value_equal (arg1, arg2); | |
1448 | struct type *type = language_bool_type (exp->language_defn, | |
1449 | exp->gdbarch); | |
1450 | return value_from_longest (type, (LONGEST) tem); | |
1451 | } | |
1452 | } | |
1453 | ||
60cdd487 TT |
1454 | /* A helper function for BINOP_LEQ. */ |
1455 | ||
46916f2b | 1456 | struct value * |
60cdd487 TT |
1457 | eval_op_leq (struct type *expect_type, struct expression *exp, |
1458 | enum noside noside, enum exp_opcode op, | |
1459 | struct value *arg1, struct value *arg2) | |
1460 | { | |
60cdd487 TT |
1461 | if (binop_user_defined_p (op, arg1, arg2)) |
1462 | { | |
1463 | return value_x_binop (arg1, arg2, op, OP_NULL, noside); | |
1464 | } | |
1465 | else | |
1466 | { | |
1467 | binop_promote (exp->language_defn, exp->gdbarch, &arg1, &arg2); | |
1468 | int tem = value_less (arg1, arg2) || value_equal (arg1, arg2); | |
1469 | struct type *type = language_bool_type (exp->language_defn, | |
1470 | exp->gdbarch); | |
1471 | return value_from_longest (type, (LONGEST) tem); | |
1472 | } | |
1473 | } | |
1474 | ||
eed70b1c TT |
1475 | /* A helper function for BINOP_REPEAT. */ |
1476 | ||
d4eff4c1 | 1477 | struct value * |
eed70b1c | 1478 | eval_op_repeat (struct type *expect_type, struct expression *exp, |
d4eff4c1 | 1479 | enum noside noside, enum exp_opcode op, |
eed70b1c TT |
1480 | struct value *arg1, struct value *arg2) |
1481 | { | |
eed70b1c TT |
1482 | struct type *type = check_typedef (value_type (arg2)); |
1483 | if (type->code () != TYPE_CODE_INT | |
1484 | && type->code () != TYPE_CODE_ENUM) | |
1485 | error (_("Non-integral right operand for \"@\" operator.")); | |
1486 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
1487 | { | |
1488 | return allocate_repeat_value (value_type (arg1), | |
1489 | longest_to_int (value_as_long (arg2))); | |
1490 | } | |
1491 | else | |
1492 | return value_repeat (arg1, longest_to_int (value_as_long (arg2))); | |
1493 | } | |
1494 | ||
39f288be TT |
1495 | /* A helper function for UNOP_PLUS. */ |
1496 | ||
9307d17b | 1497 | struct value * |
39f288be TT |
1498 | eval_op_plus (struct type *expect_type, struct expression *exp, |
1499 | enum noside noside, enum exp_opcode op, | |
1500 | struct value *arg1) | |
1501 | { | |
39f288be TT |
1502 | if (unop_user_defined_p (op, arg1)) |
1503 | return value_x_unop (arg1, op, noside); | |
1504 | else | |
1505 | { | |
1506 | unop_promote (exp->language_defn, exp->gdbarch, &arg1); | |
1507 | return value_pos (arg1); | |
1508 | } | |
1509 | } | |
1510 | ||
606d105f TT |
1511 | /* A helper function for UNOP_NEG. */ |
1512 | ||
9307d17b | 1513 | struct value * |
606d105f TT |
1514 | eval_op_neg (struct type *expect_type, struct expression *exp, |
1515 | enum noside noside, enum exp_opcode op, | |
1516 | struct value *arg1) | |
1517 | { | |
606d105f TT |
1518 | if (unop_user_defined_p (op, arg1)) |
1519 | return value_x_unop (arg1, op, noside); | |
1520 | else | |
1521 | { | |
1522 | unop_promote (exp->language_defn, exp->gdbarch, &arg1); | |
1523 | return value_neg (arg1); | |
1524 | } | |
1525 | } | |
1526 | ||
1f09ec81 TT |
1527 | /* A helper function for UNOP_COMPLEMENT. */ |
1528 | ||
9307d17b | 1529 | struct value * |
1f09ec81 TT |
1530 | eval_op_complement (struct type *expect_type, struct expression *exp, |
1531 | enum noside noside, enum exp_opcode op, | |
1532 | struct value *arg1) | |
1533 | { | |
1f09ec81 TT |
1534 | if (unop_user_defined_p (UNOP_COMPLEMENT, arg1)) |
1535 | return value_x_unop (arg1, UNOP_COMPLEMENT, noside); | |
1536 | else | |
1537 | { | |
1538 | unop_promote (exp->language_defn, exp->gdbarch, &arg1); | |
1539 | return value_complement (arg1); | |
1540 | } | |
1541 | } | |
1542 | ||
24338fb9 TT |
1543 | /* A helper function for UNOP_LOGICAL_NOT. */ |
1544 | ||
9307d17b | 1545 | struct value * |
24338fb9 TT |
1546 | eval_op_lognot (struct type *expect_type, struct expression *exp, |
1547 | enum noside noside, enum exp_opcode op, | |
1548 | struct value *arg1) | |
1549 | { | |
24338fb9 TT |
1550 | if (unop_user_defined_p (op, arg1)) |
1551 | return value_x_unop (arg1, op, noside); | |
1552 | else | |
1553 | { | |
1554 | struct type *type = language_bool_type (exp->language_defn, | |
1555 | exp->gdbarch); | |
1556 | return value_from_longest (type, (LONGEST) value_logical_not (arg1)); | |
1557 | } | |
1558 | } | |
1559 | ||
786f70ee TT |
1560 | /* A helper function for UNOP_IND. */ |
1561 | ||
876469ff | 1562 | struct value * |
786f70ee | 1563 | eval_op_ind (struct type *expect_type, struct expression *exp, |
876469ff | 1564 | enum noside noside, |
786f70ee TT |
1565 | struct value *arg1) |
1566 | { | |
1567 | struct type *type = check_typedef (value_type (arg1)); | |
1568 | if (type->code () == TYPE_CODE_METHODPTR | |
1569 | || type->code () == TYPE_CODE_MEMBERPTR) | |
1570 | error (_("Attempt to dereference pointer " | |
1571 | "to member without an object")); | |
876469ff TT |
1572 | if (unop_user_defined_p (UNOP_IND, arg1)) |
1573 | return value_x_unop (arg1, UNOP_IND, noside); | |
786f70ee TT |
1574 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) |
1575 | { | |
1576 | type = check_typedef (value_type (arg1)); | |
1577 | ||
1578 | /* If the type pointed to is dynamic then in order to resolve the | |
1579 | dynamic properties we must actually dereference the pointer. | |
1580 | There is a risk that this dereference will have side-effects | |
1581 | in the inferior, but being able to print accurate type | |
1582 | information seems worth the risk. */ | |
1583 | if ((type->code () != TYPE_CODE_PTR | |
1584 | && !TYPE_IS_REFERENCE (type)) | |
1585 | || !is_dynamic_type (TYPE_TARGET_TYPE (type))) | |
1586 | { | |
1587 | if (type->code () == TYPE_CODE_PTR | |
1588 | || TYPE_IS_REFERENCE (type) | |
1589 | /* In C you can dereference an array to get the 1st elt. */ | |
1590 | || type->code () == TYPE_CODE_ARRAY) | |
1591 | return value_zero (TYPE_TARGET_TYPE (type), | |
1592 | lval_memory); | |
1593 | else if (type->code () == TYPE_CODE_INT) | |
1594 | /* GDB allows dereferencing an int. */ | |
1595 | return value_zero (builtin_type (exp->gdbarch)->builtin_int, | |
1596 | lval_memory); | |
1597 | else | |
1598 | error (_("Attempt to take contents of a non-pointer value.")); | |
1599 | } | |
1600 | } | |
1601 | ||
1602 | /* Allow * on an integer so we can cast it to whatever we want. | |
1603 | This returns an int, which seems like the most C-like thing to | |
1604 | do. "long long" variables are rare enough that | |
1605 | BUILTIN_TYPE_LONGEST would seem to be a mistake. */ | |
1606 | if (type->code () == TYPE_CODE_INT) | |
1607 | return value_at_lazy (builtin_type (exp->gdbarch)->builtin_int, | |
1608 | (CORE_ADDR) value_as_address (arg1)); | |
1609 | return value_ind (arg1); | |
1610 | } | |
1611 | ||
acee9468 TT |
1612 | /* A helper function for UNOP_ALIGNOF. */ |
1613 | ||
ae4bb61e | 1614 | struct value * |
acee9468 TT |
1615 | eval_op_alignof (struct type *expect_type, struct expression *exp, |
1616 | enum noside noside, | |
1617 | struct value *arg1) | |
1618 | { | |
1619 | struct type *type = value_type (arg1); | |
1620 | /* FIXME: This should be size_t. */ | |
1621 | struct type *size_type = builtin_type (exp->gdbarch)->builtin_int; | |
1622 | ULONGEST align = type_align (type); | |
1623 | if (align == 0) | |
1624 | error (_("could not determine alignment of type")); | |
1625 | return value_from_longest (size_type, align); | |
1626 | } | |
1627 | ||
3aef2a07 TT |
1628 | /* A helper function for UNOP_MEMVAL. */ |
1629 | ||
cbc18219 | 1630 | struct value * |
3aef2a07 TT |
1631 | eval_op_memval (struct type *expect_type, struct expression *exp, |
1632 | enum noside noside, | |
1633 | struct value *arg1, struct type *type) | |
1634 | { | |
3aef2a07 TT |
1635 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
1636 | return value_zero (type, lval_memory); | |
1637 | else | |
1638 | return value_at_lazy (type, value_as_address (arg1)); | |
1639 | } | |
1640 | ||
00f50884 TT |
1641 | /* A helper function for UNOP_PREINCREMENT. */ |
1642 | ||
6d89e296 | 1643 | struct value * |
00f50884 TT |
1644 | eval_op_preinc (struct type *expect_type, struct expression *exp, |
1645 | enum noside noside, enum exp_opcode op, | |
1646 | struct value *arg1) | |
1647 | { | |
0b2b0b82 | 1648 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
00f50884 TT |
1649 | return arg1; |
1650 | else if (unop_user_defined_p (op, arg1)) | |
1651 | { | |
1652 | return value_x_unop (arg1, op, noside); | |
1653 | } | |
1654 | else | |
1655 | { | |
1656 | struct value *arg2; | |
1657 | if (ptrmath_type_p (exp->language_defn, value_type (arg1))) | |
1658 | arg2 = value_ptradd (arg1, 1); | |
1659 | else | |
1660 | { | |
1661 | struct value *tmp = arg1; | |
1662 | ||
1663 | arg2 = value_one (value_type (arg1)); | |
1664 | binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2); | |
1665 | arg2 = value_binop (tmp, arg2, BINOP_ADD); | |
1666 | } | |
1667 | ||
1668 | return value_assign (arg1, arg2); | |
1669 | } | |
1670 | } | |
1671 | ||
9e1361b7 TT |
1672 | /* A helper function for UNOP_PREDECREMENT. */ |
1673 | ||
6d89e296 | 1674 | struct value * |
9e1361b7 TT |
1675 | eval_op_predec (struct type *expect_type, struct expression *exp, |
1676 | enum noside noside, enum exp_opcode op, | |
1677 | struct value *arg1) | |
1678 | { | |
0b2b0b82 | 1679 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
9e1361b7 TT |
1680 | return arg1; |
1681 | else if (unop_user_defined_p (op, arg1)) | |
1682 | { | |
1683 | return value_x_unop (arg1, op, noside); | |
1684 | } | |
1685 | else | |
1686 | { | |
1687 | struct value *arg2; | |
1688 | if (ptrmath_type_p (exp->language_defn, value_type (arg1))) | |
1689 | arg2 = value_ptradd (arg1, -1); | |
1690 | else | |
1691 | { | |
1692 | struct value *tmp = arg1; | |
1693 | ||
1694 | arg2 = value_one (value_type (arg1)); | |
1695 | binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2); | |
1696 | arg2 = value_binop (tmp, arg2, BINOP_SUB); | |
1697 | } | |
1698 | ||
1699 | return value_assign (arg1, arg2); | |
1700 | } | |
1701 | } | |
1702 | ||
abffe116 TT |
1703 | /* A helper function for UNOP_POSTINCREMENT. */ |
1704 | ||
6d89e296 | 1705 | struct value * |
abffe116 TT |
1706 | eval_op_postinc (struct type *expect_type, struct expression *exp, |
1707 | enum noside noside, enum exp_opcode op, | |
1708 | struct value *arg1) | |
1709 | { | |
0b2b0b82 | 1710 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
abffe116 TT |
1711 | return arg1; |
1712 | else if (unop_user_defined_p (op, arg1)) | |
1713 | { | |
1714 | return value_x_unop (arg1, op, noside); | |
1715 | } | |
1716 | else | |
1717 | { | |
1718 | struct value *arg3 = value_non_lval (arg1); | |
1719 | struct value *arg2; | |
1720 | ||
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 | value_assign (arg1, arg2); | |
1733 | return arg3; | |
1734 | } | |
1735 | } | |
1736 | ||
a220ead5 TT |
1737 | /* A helper function for UNOP_POSTDECREMENT. */ |
1738 | ||
6d89e296 | 1739 | struct value * |
a220ead5 TT |
1740 | eval_op_postdec (struct type *expect_type, struct expression *exp, |
1741 | enum noside noside, enum exp_opcode op, | |
1742 | struct value *arg1) | |
1743 | { | |
0b2b0b82 | 1744 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
a220ead5 TT |
1745 | return arg1; |
1746 | else if (unop_user_defined_p (op, arg1)) | |
1747 | { | |
1748 | return value_x_unop (arg1, op, noside); | |
1749 | } | |
1750 | else | |
1751 | { | |
1752 | struct value *arg3 = value_non_lval (arg1); | |
1753 | struct value *arg2; | |
1754 | ||
1755 | if (ptrmath_type_p (exp->language_defn, value_type (arg1))) | |
1756 | arg2 = value_ptradd (arg1, -1); | |
1757 | else | |
1758 | { | |
1759 | struct value *tmp = arg1; | |
1760 | ||
1761 | arg2 = value_one (value_type (arg1)); | |
1762 | binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2); | |
1763 | arg2 = value_binop (tmp, arg2, BINOP_SUB); | |
1764 | } | |
1765 | ||
1766 | value_assign (arg1, arg2); | |
1767 | return arg3; | |
1768 | } | |
1769 | } | |
1770 | ||
aec95807 TT |
1771 | /* A helper function for OP_TYPE. */ |
1772 | ||
5b5f5140 | 1773 | struct value * |
aec95807 TT |
1774 | eval_op_type (struct type *expect_type, struct expression *exp, |
1775 | enum noside noside, struct type *type) | |
1776 | { | |
0b2b0b82 | 1777 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
aec95807 TT |
1778 | return allocate_value (type); |
1779 | else | |
1780 | error (_("Attempt to use a type name as an expression")); | |
1781 | } | |
1782 | ||
fb5ba2ab TT |
1783 | /* A helper function for BINOP_ASSIGN_MODIFY. */ |
1784 | ||
e5946e16 | 1785 | struct value * |
fb5ba2ab TT |
1786 | eval_binop_assign_modify (struct type *expect_type, struct expression *exp, |
1787 | enum noside noside, enum exp_opcode op, | |
1788 | struct value *arg1, struct value *arg2) | |
1789 | { | |
0b2b0b82 | 1790 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
fb5ba2ab TT |
1791 | return arg1; |
1792 | if (binop_user_defined_p (op, arg1, arg2)) | |
1793 | return value_x_binop (arg1, arg2, BINOP_ASSIGN_MODIFY, op, noside); | |
1794 | else if (op == BINOP_ADD && ptrmath_type_p (exp->language_defn, | |
1795 | value_type (arg1)) | |
1796 | && is_integral_type (value_type (arg2))) | |
1797 | arg2 = value_ptradd (arg1, value_as_long (arg2)); | |
1798 | else if (op == BINOP_SUB && ptrmath_type_p (exp->language_defn, | |
1799 | value_type (arg1)) | |
1800 | && is_integral_type (value_type (arg2))) | |
1801 | arg2 = value_ptradd (arg1, - value_as_long (arg2)); | |
1802 | else | |
1803 | { | |
1804 | struct value *tmp = arg1; | |
1805 | ||
1806 | /* For shift and integer exponentiation operations, | |
1807 | only promote the first argument. */ | |
1808 | if ((op == BINOP_LSH || op == BINOP_RSH || op == BINOP_EXP) | |
1809 | && is_integral_type (value_type (arg2))) | |
1810 | unop_promote (exp->language_defn, exp->gdbarch, &tmp); | |
1811 | else | |
1812 | binop_promote (exp->language_defn, exp->gdbarch, &tmp, &arg2); | |
1813 | ||
1814 | arg2 = value_binop (tmp, arg2, op); | |
1815 | } | |
1816 | return value_assign (arg1, arg2); | |
1817 | } | |
1818 | ||
5e80600e TT |
1819 | /* Note that ARGS needs 2 empty slots up front and must end with a |
1820 | null pointer. */ | |
1821 | static struct value * | |
1822 | eval_op_objc_msgcall (struct type *expect_type, struct expression *exp, | |
1823 | enum noside noside, CORE_ADDR selector, | |
1824 | value *target, gdb::array_view<value *> args) | |
1825 | { | |
1826 | CORE_ADDR responds_selector = 0; | |
1827 | CORE_ADDR method_selector = 0; | |
1828 | ||
1829 | int struct_return = 0; | |
1830 | ||
1831 | struct value *msg_send = NULL; | |
1832 | struct value *msg_send_stret = NULL; | |
1833 | int gnu_runtime = 0; | |
1834 | ||
1835 | struct value *method = NULL; | |
1836 | struct value *called_method = NULL; | |
1837 | ||
1838 | struct type *selector_type = NULL; | |
1839 | struct type *long_type; | |
1840 | struct type *type; | |
1841 | ||
1842 | struct value *ret = NULL; | |
1843 | CORE_ADDR addr = 0; | |
1844 | ||
1845 | value *argvec[5]; | |
1846 | ||
1847 | long_type = builtin_type (exp->gdbarch)->builtin_long; | |
1848 | selector_type = builtin_type (exp->gdbarch)->builtin_data_ptr; | |
1849 | ||
1850 | if (value_as_long (target) == 0) | |
1851 | return value_from_longest (long_type, 0); | |
1852 | ||
1853 | if (lookup_minimal_symbol ("objc_msg_lookup", 0, 0).minsym) | |
1854 | gnu_runtime = 1; | |
1855 | ||
1856 | /* Find the method dispatch (Apple runtime) or method lookup | |
1857 | (GNU runtime) function for Objective-C. These will be used | |
1858 | to lookup the symbol information for the method. If we | |
1859 | can't find any symbol information, then we'll use these to | |
1860 | call the method, otherwise we can call the method | |
1861 | directly. The msg_send_stret function is used in the special | |
1862 | case of a method that returns a structure (Apple runtime | |
1863 | only). */ | |
1864 | if (gnu_runtime) | |
1865 | { | |
1866 | type = selector_type; | |
1867 | ||
1868 | type = lookup_function_type (type); | |
1869 | type = lookup_pointer_type (type); | |
1870 | type = lookup_function_type (type); | |
1871 | type = lookup_pointer_type (type); | |
1872 | ||
1873 | msg_send = find_function_in_inferior ("objc_msg_lookup", NULL); | |
1874 | msg_send_stret | |
1875 | = find_function_in_inferior ("objc_msg_lookup", NULL); | |
1876 | ||
1877 | msg_send = value_from_pointer (type, value_as_address (msg_send)); | |
1878 | msg_send_stret = value_from_pointer (type, | |
1879 | value_as_address (msg_send_stret)); | |
1880 | } | |
1881 | else | |
1882 | { | |
1883 | msg_send = find_function_in_inferior ("objc_msgSend", NULL); | |
1884 | /* Special dispatcher for methods returning structs. */ | |
1885 | msg_send_stret | |
1886 | = find_function_in_inferior ("objc_msgSend_stret", NULL); | |
1887 | } | |
1888 | ||
1889 | /* Verify the target object responds to this method. The | |
1890 | standard top-level 'Object' class uses a different name for | |
1891 | the verification method than the non-standard, but more | |
1892 | often used, 'NSObject' class. Make sure we check for both. */ | |
1893 | ||
1894 | responds_selector | |
1895 | = lookup_child_selector (exp->gdbarch, "respondsToSelector:"); | |
1896 | if (responds_selector == 0) | |
1897 | responds_selector | |
1898 | = lookup_child_selector (exp->gdbarch, "respondsTo:"); | |
1899 | ||
1900 | if (responds_selector == 0) | |
1901 | error (_("no 'respondsTo:' or 'respondsToSelector:' method")); | |
1902 | ||
1903 | method_selector | |
1904 | = lookup_child_selector (exp->gdbarch, "methodForSelector:"); | |
1905 | if (method_selector == 0) | |
1906 | method_selector | |
1907 | = lookup_child_selector (exp->gdbarch, "methodFor:"); | |
1908 | ||
1909 | if (method_selector == 0) | |
1910 | error (_("no 'methodFor:' or 'methodForSelector:' method")); | |
1911 | ||
1912 | /* Call the verification method, to make sure that the target | |
1913 | class implements the desired method. */ | |
1914 | ||
1915 | argvec[0] = msg_send; | |
1916 | argvec[1] = target; | |
1917 | argvec[2] = value_from_longest (long_type, responds_selector); | |
1918 | argvec[3] = value_from_longest (long_type, selector); | |
1919 | argvec[4] = 0; | |
1920 | ||
1921 | ret = call_function_by_hand (argvec[0], NULL, {argvec + 1, 3}); | |
1922 | if (gnu_runtime) | |
1923 | { | |
1924 | /* Function objc_msg_lookup returns a pointer. */ | |
1925 | argvec[0] = ret; | |
1926 | ret = call_function_by_hand (argvec[0], NULL, {argvec + 1, 3}); | |
1927 | } | |
1928 | if (value_as_long (ret) == 0) | |
1929 | error (_("Target does not respond to this message selector.")); | |
1930 | ||
1931 | /* Call "methodForSelector:" method, to get the address of a | |
1932 | function method that implements this selector for this | |
1933 | class. If we can find a symbol at that address, then we | |
1934 | know the return type, parameter types etc. (that's a good | |
1935 | thing). */ | |
1936 | ||
1937 | argvec[0] = msg_send; | |
1938 | argvec[1] = target; | |
1939 | argvec[2] = value_from_longest (long_type, method_selector); | |
1940 | argvec[3] = value_from_longest (long_type, selector); | |
1941 | argvec[4] = 0; | |
1942 | ||
1943 | ret = call_function_by_hand (argvec[0], NULL, {argvec + 1, 3}); | |
1944 | if (gnu_runtime) | |
1945 | { | |
1946 | argvec[0] = ret; | |
1947 | ret = call_function_by_hand (argvec[0], NULL, {argvec + 1, 3}); | |
1948 | } | |
1949 | ||
1950 | /* ret should now be the selector. */ | |
1951 | ||
1952 | addr = value_as_long (ret); | |
1953 | if (addr) | |
1954 | { | |
1955 | struct symbol *sym = NULL; | |
1956 | ||
1957 | /* The address might point to a function descriptor; | |
1958 | resolve it to the actual code address instead. */ | |
1959 | addr = gdbarch_convert_from_func_ptr_addr (exp->gdbarch, addr, | |
1960 | current_top_target ()); | |
1961 | ||
1962 | /* Is it a high_level symbol? */ | |
1963 | sym = find_pc_function (addr); | |
1964 | if (sym != NULL) | |
1965 | method = value_of_variable (sym, 0); | |
1966 | } | |
1967 | ||
1968 | /* If we found a method with symbol information, check to see | |
1969 | if it returns a struct. Otherwise assume it doesn't. */ | |
1970 | ||
1971 | if (method) | |
1972 | { | |
1973 | CORE_ADDR funaddr; | |
1974 | struct type *val_type; | |
1975 | ||
1976 | funaddr = find_function_addr (method, &val_type); | |
1977 | ||
1978 | block_for_pc (funaddr); | |
1979 | ||
1980 | val_type = check_typedef (val_type); | |
1981 | ||
1982 | if ((val_type == NULL) | |
1983 | || (val_type->code () == TYPE_CODE_ERROR)) | |
1984 | { | |
1985 | if (expect_type != NULL) | |
1986 | val_type = expect_type; | |
1987 | } | |
1988 | ||
1989 | struct_return = using_struct_return (exp->gdbarch, method, | |
1990 | val_type); | |
1991 | } | |
1992 | else if (expect_type != NULL) | |
1993 | { | |
1994 | struct_return = using_struct_return (exp->gdbarch, NULL, | |
1995 | check_typedef (expect_type)); | |
1996 | } | |
1997 | ||
1998 | /* Found a function symbol. Now we will substitute its | |
1999 | value in place of the message dispatcher (obj_msgSend), | |
2000 | so that we call the method directly instead of thru | |
2001 | the dispatcher. The main reason for doing this is that | |
2002 | we can now evaluate the return value and parameter values | |
2003 | according to their known data types, in case we need to | |
2004 | do things like promotion, dereferencing, special handling | |
2005 | of structs and doubles, etc. | |
2006 | ||
2007 | We want to use the type signature of 'method', but still | |
2008 | jump to objc_msgSend() or objc_msgSend_stret() to better | |
2009 | mimic the behavior of the runtime. */ | |
2010 | ||
2011 | if (method) | |
2012 | { | |
2013 | if (value_type (method)->code () != TYPE_CODE_FUNC) | |
2014 | error (_("method address has symbol information " | |
2015 | "with non-function type; skipping")); | |
2016 | ||
2017 | /* Create a function pointer of the appropriate type, and | |
2018 | replace its value with the value of msg_send or | |
2019 | msg_send_stret. We must use a pointer here, as | |
2020 | msg_send and msg_send_stret are of pointer type, and | |
2021 | the representation may be different on systems that use | |
2022 | function descriptors. */ | |
2023 | if (struct_return) | |
2024 | called_method | |
2025 | = value_from_pointer (lookup_pointer_type (value_type (method)), | |
2026 | value_as_address (msg_send_stret)); | |
2027 | else | |
2028 | called_method | |
2029 | = value_from_pointer (lookup_pointer_type (value_type (method)), | |
2030 | value_as_address (msg_send)); | |
2031 | } | |
2032 | else | |
2033 | { | |
2034 | if (struct_return) | |
2035 | called_method = msg_send_stret; | |
2036 | else | |
2037 | called_method = msg_send; | |
2038 | } | |
2039 | ||
5e80600e TT |
2040 | |
2041 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
2042 | { | |
2043 | /* If the return type doesn't look like a function type, | |
2044 | call an error. This can happen if somebody tries to | |
2045 | turn a variable into a function call. This is here | |
2046 | because people often want to call, eg, strcmp, which | |
2047 | gdb doesn't know is a function. If gdb isn't asked for | |
2048 | it's opinion (ie. through "whatis"), it won't offer | |
2049 | it. */ | |
2050 | ||
2051 | struct type *callee_type = value_type (called_method); | |
2052 | ||
2053 | if (callee_type && callee_type->code () == TYPE_CODE_PTR) | |
2054 | callee_type = TYPE_TARGET_TYPE (callee_type); | |
2055 | callee_type = TYPE_TARGET_TYPE (callee_type); | |
2056 | ||
2057 | if (callee_type) | |
2058 | { | |
2059 | if ((callee_type->code () == TYPE_CODE_ERROR) && expect_type) | |
2060 | return allocate_value (expect_type); | |
2061 | else | |
2062 | return allocate_value (callee_type); | |
2063 | } | |
2064 | else | |
2065 | error (_("Expression of type other than " | |
2066 | "\"method returning ...\" used as a method")); | |
2067 | } | |
2068 | ||
2069 | /* Now depending on whether we found a symbol for the method, | |
2070 | we will either call the runtime dispatcher or the method | |
2071 | directly. */ | |
2072 | ||
2073 | args[0] = target; | |
2074 | args[1] = value_from_longest (long_type, selector); | |
2075 | ||
2076 | if (gnu_runtime && (method != NULL)) | |
2077 | { | |
2078 | /* Function objc_msg_lookup returns a pointer. */ | |
2079 | struct type *tem_type = value_type (called_method); | |
2080 | tem_type = lookup_pointer_type (lookup_function_type (tem_type)); | |
2081 | deprecated_set_value_type (called_method, tem_type); | |
2082 | called_method = call_function_by_hand (called_method, NULL, args); | |
2083 | } | |
2084 | ||
2085 | return call_function_by_hand (called_method, NULL, args); | |
2086 | } | |
2087 | ||
c0d7ed8c TT |
2088 | /* Helper function for MULTI_SUBSCRIPT. */ |
2089 | ||
2090 | static struct value * | |
2091 | eval_multi_subscript (struct type *expect_type, struct expression *exp, | |
2092 | enum noside noside, value *arg1, | |
2093 | gdb::array_view<value *> args) | |
2094 | { | |
c0d7ed8c TT |
2095 | for (value *arg2 : args) |
2096 | { | |
2097 | if (binop_user_defined_p (MULTI_SUBSCRIPT, arg1, arg2)) | |
2098 | { | |
2099 | arg1 = value_x_binop (arg1, arg2, MULTI_SUBSCRIPT, OP_NULL, noside); | |
2100 | } | |
2101 | else | |
2102 | { | |
2103 | arg1 = coerce_ref (arg1); | |
2104 | struct type *type = check_typedef (value_type (arg1)); | |
2105 | ||
2106 | switch (type->code ()) | |
2107 | { | |
2108 | case TYPE_CODE_PTR: | |
2109 | case TYPE_CODE_ARRAY: | |
2110 | case TYPE_CODE_STRING: | |
2111 | arg1 = value_subscript (arg1, value_as_long (arg2)); | |
2112 | break; | |
2113 | ||
2114 | default: | |
2115 | if (type->name ()) | |
2116 | error (_("cannot subscript something of type `%s'"), | |
2117 | type->name ()); | |
2118 | else | |
2119 | error (_("cannot subscript requested type")); | |
2120 | } | |
2121 | } | |
2122 | } | |
2123 | return (arg1); | |
2124 | } | |
2125 | ||
085734dd TT |
2126 | namespace expr |
2127 | { | |
2128 | ||
2129 | value * | |
2130 | objc_msgcall_operation::evaluate (struct type *expect_type, | |
2131 | struct expression *exp, | |
2132 | enum noside noside) | |
2133 | { | |
2134 | enum noside sub_no_side = EVAL_NORMAL; | |
2135 | struct type *selector_type = builtin_type (exp->gdbarch)->builtin_data_ptr; | |
2136 | ||
2137 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
2138 | sub_no_side = EVAL_NORMAL; | |
2139 | else | |
2140 | sub_no_side = noside; | |
2141 | value *target | |
2142 | = std::get<1> (m_storage)->evaluate (selector_type, exp, sub_no_side); | |
2143 | ||
2144 | if (value_as_long (target) == 0) | |
2145 | sub_no_side = EVAL_AVOID_SIDE_EFFECTS; | |
2146 | else | |
2147 | sub_no_side = noside; | |
2148 | std::vector<operation_up> &args = std::get<2> (m_storage); | |
2149 | value **argvec = XALLOCAVEC (struct value *, args.size () + 3); | |
2150 | argvec[0] = nullptr; | |
2151 | argvec[1] = nullptr; | |
2152 | for (int i = 0; i < args.size (); ++i) | |
2153 | argvec[i + 2] = args[i]->evaluate_with_coercion (exp, sub_no_side); | |
2154 | argvec[args.size () + 2] = nullptr; | |
2155 | ||
2156 | return eval_op_objc_msgcall (expect_type, exp, noside, std:: | |
2157 | get<0> (m_storage), target, | |
2158 | gdb::make_array_view (argvec, | |
2159 | args.size () + 3)); | |
2160 | } | |
2161 | ||
821e72d7 TT |
2162 | value * |
2163 | multi_subscript_operation::evaluate (struct type *expect_type, | |
2164 | struct expression *exp, | |
2165 | enum noside noside) | |
2166 | { | |
2167 | value *arg1 = std::get<0> (m_storage)->evaluate_with_coercion (exp, noside); | |
2168 | std::vector<operation_up> &values = std::get<1> (m_storage); | |
2169 | value **argvec = XALLOCAVEC (struct value *, values.size ()); | |
2170 | for (int ix = 0; ix < values.size (); ++ix) | |
2171 | argvec[ix] = values[ix]->evaluate_with_coercion (exp, noside); | |
2172 | return eval_multi_subscript (expect_type, exp, noside, arg1, | |
2173 | gdb::make_array_view (argvec, values.size ())); | |
085734dd TT |
2174 | } |
2175 | ||
5019124b TT |
2176 | value * |
2177 | logical_and_operation::evaluate (struct type *expect_type, | |
2178 | struct expression *exp, | |
2179 | enum noside noside) | |
2180 | { | |
2181 | value *arg1 = std::get<0> (m_storage)->evaluate (nullptr, exp, noside); | |
5019124b TT |
2182 | |
2183 | value *arg2 = std::get<1> (m_storage)->evaluate (nullptr, exp, | |
2184 | EVAL_AVOID_SIDE_EFFECTS); | |
2185 | ||
2186 | if (binop_user_defined_p (BINOP_LOGICAL_AND, arg1, arg2)) | |
2187 | { | |
2188 | arg2 = std::get<1> (m_storage)->evaluate (nullptr, exp, noside); | |
2189 | return value_x_binop (arg1, arg2, BINOP_LOGICAL_AND, OP_NULL, noside); | |
2190 | } | |
2191 | else | |
2192 | { | |
2193 | int tem = value_logical_not (arg1); | |
2194 | if (!tem) | |
2195 | { | |
2196 | arg2 = std::get<1> (m_storage)->evaluate (nullptr, exp, noside); | |
2197 | tem = value_logical_not (arg2); | |
2198 | } | |
2199 | struct type *type = language_bool_type (exp->language_defn, | |
2200 | exp->gdbarch); | |
2201 | return value_from_longest (type, !tem); | |
2202 | } | |
2203 | } | |
2204 | ||
2205 | value * | |
2206 | logical_or_operation::evaluate (struct type *expect_type, | |
2207 | struct expression *exp, | |
2208 | enum noside noside) | |
2209 | { | |
2210 | value *arg1 = std::get<0> (m_storage)->evaluate (nullptr, exp, noside); | |
5019124b TT |
2211 | |
2212 | value *arg2 = std::get<1> (m_storage)->evaluate (nullptr, exp, | |
2213 | EVAL_AVOID_SIDE_EFFECTS); | |
2214 | ||
2215 | if (binop_user_defined_p (BINOP_LOGICAL_OR, arg1, arg2)) | |
2216 | { | |
2217 | arg2 = std::get<1> (m_storage)->evaluate (nullptr, exp, noside); | |
2218 | return value_x_binop (arg1, arg2, BINOP_LOGICAL_OR, OP_NULL, noside); | |
2219 | } | |
2220 | else | |
2221 | { | |
2222 | int tem = value_logical_not (arg1); | |
2223 | if (tem) | |
2224 | { | |
2225 | arg2 = std::get<1> (m_storage)->evaluate (nullptr, exp, noside); | |
2226 | tem = value_logical_not (arg2); | |
2227 | } | |
2228 | ||
2229 | struct type *type = language_bool_type (exp->language_defn, | |
2230 | exp->gdbarch); | |
2231 | return value_from_longest (type, !tem); | |
2232 | } | |
2233 | } | |
2234 | ||
e4479080 TT |
2235 | value * |
2236 | adl_func_operation::evaluate (struct type *expect_type, | |
2237 | struct expression *exp, | |
2238 | enum noside noside) | |
2239 | { | |
2240 | std::vector<operation_up> &arg_ops = std::get<2> (m_storage); | |
2241 | std::vector<value *> args (arg_ops.size ()); | |
2242 | for (int i = 0; i < arg_ops.size (); ++i) | |
2243 | args[i] = arg_ops[i]->evaluate_with_coercion (exp, noside); | |
2244 | ||
2245 | struct symbol *symp; | |
2246 | find_overload_match (args, std::get<0> (m_storage).c_str (), | |
2247 | NON_METHOD, | |
2248 | nullptr, nullptr, | |
2249 | nullptr, &symp, nullptr, 0, noside); | |
2250 | if (SYMBOL_TYPE (symp)->code () == TYPE_CODE_ERROR) | |
2251 | error_unknown_type (symp->print_name ()); | |
2252 | value *callee = evaluate_var_value (noside, std::get<1> (m_storage), symp); | |
2253 | return evaluate_subexp_do_call (exp, noside, callee, args, | |
2254 | nullptr, expect_type); | |
2255 | ||
2256 | } | |
2257 | ||
1c02eb30 TT |
2258 | /* This function evaluates brace-initializers (in C/C++) for |
2259 | structure types. */ | |
2260 | ||
2261 | struct value * | |
2262 | array_operation::evaluate_struct_tuple (struct value *struct_val, | |
2263 | struct expression *exp, | |
2264 | enum noside noside, int nargs) | |
2265 | { | |
2266 | const std::vector<operation_up> &in_args = std::get<2> (m_storage); | |
2267 | struct type *struct_type = check_typedef (value_type (struct_val)); | |
2268 | struct type *field_type; | |
2269 | int fieldno = -1; | |
2270 | ||
2271 | int idx = 0; | |
2272 | while (--nargs >= 0) | |
2273 | { | |
2274 | struct value *val = NULL; | |
2275 | int bitpos, bitsize; | |
2276 | bfd_byte *addr; | |
2277 | ||
2278 | fieldno++; | |
2279 | /* Skip static fields. */ | |
2280 | while (fieldno < struct_type->num_fields () | |
2281 | && field_is_static (&struct_type->field (fieldno))) | |
2282 | fieldno++; | |
2283 | if (fieldno >= struct_type->num_fields ()) | |
2284 | error (_("too many initializers")); | |
2285 | field_type = struct_type->field (fieldno).type (); | |
2286 | if (field_type->code () == TYPE_CODE_UNION | |
2287 | && TYPE_FIELD_NAME (struct_type, fieldno)[0] == '0') | |
2288 | error (_("don't know which variant you want to set")); | |
2289 | ||
2290 | /* Here, struct_type is the type of the inner struct, | |
2291 | while substruct_type is the type of the inner struct. | |
2292 | These are the same for normal structures, but a variant struct | |
2293 | contains anonymous union fields that contain substruct fields. | |
2294 | The value fieldno is the index of the top-level (normal or | |
2295 | anonymous union) field in struct_field, while the value | |
2296 | subfieldno is the index of the actual real (named inner) field | |
2297 | in substruct_type. */ | |
2298 | ||
2299 | field_type = struct_type->field (fieldno).type (); | |
2300 | if (val == 0) | |
2301 | val = in_args[idx++]->evaluate (field_type, exp, noside); | |
2302 | ||
2303 | /* Now actually set the field in struct_val. */ | |
2304 | ||
2305 | /* Assign val to field fieldno. */ | |
2306 | if (value_type (val) != field_type) | |
2307 | val = value_cast (field_type, val); | |
2308 | ||
2309 | bitsize = TYPE_FIELD_BITSIZE (struct_type, fieldno); | |
2310 | bitpos = TYPE_FIELD_BITPOS (struct_type, fieldno); | |
2311 | addr = value_contents_writeable (struct_val) + bitpos / 8; | |
2312 | if (bitsize) | |
2313 | modify_field (struct_type, addr, | |
2314 | value_as_long (val), bitpos % 8, bitsize); | |
2315 | else | |
2316 | memcpy (addr, value_contents (val), | |
2317 | TYPE_LENGTH (value_type (val))); | |
2318 | ||
2319 | } | |
2320 | return struct_val; | |
2321 | } | |
2322 | ||
2323 | value * | |
2324 | array_operation::evaluate (struct type *expect_type, | |
2325 | struct expression *exp, | |
2326 | enum noside noside) | |
2327 | { | |
2328 | int tem; | |
2329 | int tem2 = std::get<0> (m_storage); | |
2330 | int tem3 = std::get<1> (m_storage); | |
2331 | const std::vector<operation_up> &in_args = std::get<2> (m_storage); | |
2332 | int nargs = tem3 - tem2 + 1; | |
2333 | struct type *type = expect_type ? check_typedef (expect_type) : nullptr; | |
2334 | ||
0b2b0b82 | 2335 | if (expect_type != nullptr |
1c02eb30 TT |
2336 | && type->code () == TYPE_CODE_STRUCT) |
2337 | { | |
2338 | struct value *rec = allocate_value (expect_type); | |
2339 | ||
2340 | memset (value_contents_raw (rec), '\0', TYPE_LENGTH (type)); | |
2341 | return evaluate_struct_tuple (rec, exp, noside, nargs); | |
2342 | } | |
2343 | ||
0b2b0b82 | 2344 | if (expect_type != nullptr |
1c02eb30 TT |
2345 | && type->code () == TYPE_CODE_ARRAY) |
2346 | { | |
2347 | struct type *range_type = type->index_type (); | |
2348 | struct type *element_type = TYPE_TARGET_TYPE (type); | |
2349 | struct value *array = allocate_value (expect_type); | |
2350 | int element_size = TYPE_LENGTH (check_typedef (element_type)); | |
2351 | LONGEST low_bound, high_bound, index; | |
2352 | ||
2353 | if (!get_discrete_bounds (range_type, &low_bound, &high_bound)) | |
2354 | { | |
2355 | low_bound = 0; | |
2356 | high_bound = (TYPE_LENGTH (type) / element_size) - 1; | |
2357 | } | |
2358 | index = low_bound; | |
2359 | memset (value_contents_raw (array), 0, TYPE_LENGTH (expect_type)); | |
2360 | for (tem = nargs; --nargs >= 0;) | |
2361 | { | |
2362 | struct value *element; | |
2363 | ||
2364 | element = in_args[index - low_bound]->evaluate (element_type, | |
2365 | exp, noside); | |
2366 | if (value_type (element) != element_type) | |
2367 | element = value_cast (element_type, element); | |
2368 | if (index > high_bound) | |
2369 | /* To avoid memory corruption. */ | |
2370 | error (_("Too many array elements")); | |
2371 | memcpy (value_contents_raw (array) | |
2372 | + (index - low_bound) * element_size, | |
2373 | value_contents (element), | |
2374 | element_size); | |
2375 | index++; | |
2376 | } | |
2377 | return array; | |
2378 | } | |
2379 | ||
0b2b0b82 | 2380 | if (expect_type != nullptr |
1c02eb30 TT |
2381 | && type->code () == TYPE_CODE_SET) |
2382 | { | |
2383 | struct value *set = allocate_value (expect_type); | |
2384 | gdb_byte *valaddr = value_contents_raw (set); | |
2385 | struct type *element_type = type->index_type (); | |
2386 | struct type *check_type = element_type; | |
2387 | LONGEST low_bound, high_bound; | |
2388 | ||
2389 | /* Get targettype of elementtype. */ | |
2390 | while (check_type->code () == TYPE_CODE_RANGE | |
2391 | || check_type->code () == TYPE_CODE_TYPEDEF) | |
2392 | check_type = TYPE_TARGET_TYPE (check_type); | |
2393 | ||
2394 | if (!get_discrete_bounds (element_type, &low_bound, &high_bound)) | |
2395 | error (_("(power)set type with unknown size")); | |
2396 | memset (valaddr, '\0', TYPE_LENGTH (type)); | |
2397 | int idx = 0; | |
2398 | for (tem = 0; tem < nargs; tem++) | |
2399 | { | |
2400 | LONGEST range_low, range_high; | |
2401 | struct type *range_low_type, *range_high_type; | |
2402 | struct value *elem_val; | |
2403 | ||
2404 | elem_val = in_args[idx++]->evaluate (element_type, exp, noside); | |
2405 | range_low_type = range_high_type = value_type (elem_val); | |
2406 | range_low = range_high = value_as_long (elem_val); | |
2407 | ||
2408 | /* Check types of elements to avoid mixture of elements from | |
2409 | different types. Also check if type of element is "compatible" | |
2410 | with element type of powerset. */ | |
2411 | if (range_low_type->code () == TYPE_CODE_RANGE) | |
2412 | range_low_type = TYPE_TARGET_TYPE (range_low_type); | |
2413 | if (range_high_type->code () == TYPE_CODE_RANGE) | |
2414 | range_high_type = TYPE_TARGET_TYPE (range_high_type); | |
2415 | if ((range_low_type->code () != range_high_type->code ()) | |
2416 | || (range_low_type->code () == TYPE_CODE_ENUM | |
2417 | && (range_low_type != range_high_type))) | |
2418 | /* different element modes. */ | |
2419 | error (_("POWERSET tuple elements of different mode")); | |
2420 | if ((check_type->code () != range_low_type->code ()) | |
2421 | || (check_type->code () == TYPE_CODE_ENUM | |
2422 | && range_low_type != check_type)) | |
2423 | error (_("incompatible POWERSET tuple elements")); | |
2424 | if (range_low > range_high) | |
2425 | { | |
2426 | warning (_("empty POWERSET tuple range")); | |
2427 | continue; | |
2428 | } | |
2429 | if (range_low < low_bound || range_high > high_bound) | |
2430 | error (_("POWERSET tuple element out of range")); | |
2431 | range_low -= low_bound; | |
2432 | range_high -= low_bound; | |
2433 | for (; range_low <= range_high; range_low++) | |
2434 | { | |
2435 | int bit_index = (unsigned) range_low % TARGET_CHAR_BIT; | |
2436 | ||
2437 | if (gdbarch_byte_order (exp->gdbarch) == BFD_ENDIAN_BIG) | |
2438 | bit_index = TARGET_CHAR_BIT - 1 - bit_index; | |
2439 | valaddr[(unsigned) range_low / TARGET_CHAR_BIT] | |
2440 | |= 1 << bit_index; | |
2441 | } | |
2442 | } | |
2443 | return set; | |
2444 | } | |
2445 | ||
2446 | value **argvec = XALLOCAVEC (struct value *, nargs); | |
2447 | for (tem = 0; tem < nargs; tem++) | |
2448 | { | |
2449 | /* Ensure that array expressions are coerced into pointer | |
2450 | objects. */ | |
2451 | argvec[tem] = in_args[tem]->evaluate_with_coercion (exp, noside); | |
2452 | } | |
1c02eb30 TT |
2453 | return value_array (tem2, tem3, argvec); |
2454 | } | |
2455 | ||
821e72d7 | 2456 | } |
085734dd | 2457 | |
c906108c | 2458 | \f |
13ea014a TT |
2459 | /* Helper for evaluate_subexp_for_address. */ |
2460 | ||
2461 | static value * | |
2462 | evaluate_subexp_for_address_base (struct expression *exp, enum noside noside, | |
2463 | value *x) | |
2464 | { | |
2465 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
2466 | { | |
2467 | struct type *type = check_typedef (value_type (x)); | |
2468 | ||
2469 | if (TYPE_IS_REFERENCE (type)) | |
2470 | return value_zero (lookup_pointer_type (TYPE_TARGET_TYPE (type)), | |
2471 | not_lval); | |
2472 | else if (VALUE_LVAL (x) == lval_memory || value_must_coerce_to_target (x)) | |
2473 | return value_zero (lookup_pointer_type (value_type (x)), | |
2474 | not_lval); | |
2475 | else | |
2476 | error (_("Attempt to take address of " | |
2477 | "value not located in memory.")); | |
2478 | } | |
2479 | return value_addr (x); | |
2480 | } | |
2481 | ||
e2803273 TT |
2482 | namespace expr |
2483 | { | |
2484 | ||
2485 | value * | |
2486 | operation::evaluate_for_cast (struct type *expect_type, | |
2487 | struct expression *exp, | |
2488 | enum noside noside) | |
2489 | { | |
2490 | value *val = evaluate (expect_type, exp, noside); | |
e2803273 TT |
2491 | return value_cast (expect_type, val); |
2492 | } | |
2493 | ||
2494 | value * | |
2495 | operation::evaluate_for_address (struct expression *exp, enum noside noside) | |
2496 | { | |
2497 | value *val = evaluate (nullptr, exp, noside); | |
2498 | return evaluate_subexp_for_address_base (exp, noside, val); | |
2499 | } | |
2500 | ||
d5ab122c TT |
2501 | value * |
2502 | scope_operation::evaluate_for_address (struct expression *exp, | |
2503 | enum noside noside) | |
2504 | { | |
2505 | value *x = value_aggregate_elt (std::get<0> (m_storage), | |
2506 | std::get<1> (m_storage).c_str (), | |
2507 | NULL, 1, noside); | |
2508 | if (x == NULL) | |
2509 | error (_("There is no field named %s"), std::get<1> (m_storage).c_str ()); | |
2510 | return x; | |
2511 | } | |
2512 | ||
876469ff TT |
2513 | value * |
2514 | unop_ind_base_operation::evaluate_for_address (struct expression *exp, | |
2515 | enum noside noside) | |
2516 | { | |
2517 | value *x = std::get<0> (m_storage)->evaluate (nullptr, exp, noside); | |
2518 | ||
2519 | /* We can't optimize out "&*" if there's a user-defined operator*. */ | |
2520 | if (unop_user_defined_p (UNOP_IND, x)) | |
2521 | { | |
2522 | x = value_x_unop (x, UNOP_IND, noside); | |
2523 | return evaluate_subexp_for_address_base (exp, noside, x); | |
2524 | } | |
2525 | ||
2526 | return coerce_array (x); | |
2527 | } | |
2528 | ||
0c8effa3 TT |
2529 | value * |
2530 | var_msym_value_operation::evaluate_for_address (struct expression *exp, | |
2531 | enum noside noside) | |
2532 | { | |
9c79936b TT |
2533 | const bound_minimal_symbol &b = std::get<0> (m_storage); |
2534 | value *val = evaluate_var_msym_value (noside, b.objfile, b.minsym); | |
0c8effa3 TT |
2535 | if (noside == EVAL_AVOID_SIDE_EFFECTS) |
2536 | { | |
2537 | struct type *type = lookup_pointer_type (value_type (val)); | |
2538 | return value_zero (type, not_lval); | |
2539 | } | |
2540 | else | |
2541 | return value_addr (val); | |
2542 | } | |
2543 | ||
cbc18219 TT |
2544 | value * |
2545 | unop_memval_operation::evaluate_for_address (struct expression *exp, | |
2546 | enum noside noside) | |
2547 | { | |
2548 | return value_cast (lookup_pointer_type (std::get<1> (m_storage)), | |
2549 | std::get<0> (m_storage)->evaluate (nullptr, exp, noside)); | |
2550 | } | |
2551 | ||
2552 | value * | |
2553 | unop_memval_type_operation::evaluate_for_address (struct expression *exp, | |
2554 | enum noside noside) | |
2555 | { | |
2556 | value *typeval = std::get<0> (m_storage)->evaluate (nullptr, exp, | |
2557 | EVAL_AVOID_SIDE_EFFECTS); | |
2558 | struct type *type = value_type (typeval); | |
2559 | return value_cast (lookup_pointer_type (type), | |
2560 | std::get<1> (m_storage)->evaluate (nullptr, exp, noside)); | |
2561 | } | |
2562 | ||
e82a5afc TT |
2563 | value * |
2564 | var_value_operation::evaluate_for_address (struct expression *exp, | |
2565 | enum noside noside) | |
2566 | { | |
2567 | symbol *var = std::get<0> (m_storage); | |
2568 | ||
2569 | /* C++: The "address" of a reference should yield the address | |
2570 | * of the object pointed to. Let value_addr() deal with it. */ | |
2571 | if (TYPE_IS_REFERENCE (SYMBOL_TYPE (var))) | |
2572 | return operation::evaluate_for_address (exp, noside); | |
2573 | ||
2574 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
2575 | { | |
2576 | struct type *type = lookup_pointer_type (SYMBOL_TYPE (var)); | |
2577 | enum address_class sym_class = SYMBOL_CLASS (var); | |
2578 | ||
2579 | if (sym_class == LOC_CONST | |
2580 | || sym_class == LOC_CONST_BYTES | |
2581 | || sym_class == LOC_REGISTER) | |
2582 | error (_("Attempt to take address of register or constant.")); | |
2583 | ||
2584 | return value_zero (type, not_lval); | |
2585 | } | |
2586 | else | |
2587 | return address_of_variable (var, std::get<1> (m_storage)); | |
2588 | } | |
2589 | ||
2590 | value * | |
2591 | var_value_operation::evaluate_with_coercion (struct expression *exp, | |
2592 | enum noside noside) | |
2593 | { | |
2594 | struct symbol *var = std::get<0> (m_storage); | |
2595 | struct type *type = check_typedef (SYMBOL_TYPE (var)); | |
2596 | if (type->code () == TYPE_CODE_ARRAY | |
2597 | && !type->is_vector () | |
2598 | && CAST_IS_CONVERSION (exp->language_defn)) | |
2599 | { | |
2600 | struct value *val = address_of_variable (var, std::get<1> (m_storage)); | |
2601 | return value_cast (lookup_pointer_type (TYPE_TARGET_TYPE (type)), val); | |
2602 | } | |
2603 | return evaluate (nullptr, exp, noside); | |
2604 | } | |
2605 | ||
2606 | } | |
2607 | ||
13ea014a TT |
2608 | /* Helper function for evaluating the size of a type. */ |
2609 | ||
2610 | static value * | |
2611 | evaluate_subexp_for_sizeof_base (struct expression *exp, struct type *type) | |
2612 | { | |
2613 | /* FIXME: This should be size_t. */ | |
2614 | struct type *size_type = builtin_type (exp->gdbarch)->builtin_int; | |
2615 | /* $5.3.3/2 of the C++ Standard (n3290 draft) says of sizeof: | |
2616 | "When applied to a reference or a reference type, the result is | |
2617 | the size of the referenced type." */ | |
2618 | type = check_typedef (type); | |
2619 | if (exp->language_defn->la_language == language_cplus | |
2620 | && (TYPE_IS_REFERENCE (type))) | |
2621 | type = check_typedef (TYPE_TARGET_TYPE (type)); | |
2622 | return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type)); | |
2623 | } | |
2624 | ||
e2803273 TT |
2625 | namespace expr |
2626 | { | |
2627 | ||
2628 | value * | |
2629 | operation::evaluate_for_sizeof (struct expression *exp, enum noside noside) | |
2630 | { | |
2631 | value *val = evaluate (nullptr, exp, EVAL_AVOID_SIDE_EFFECTS); | |
2632 | return evaluate_subexp_for_sizeof_base (exp, value_type (val)); | |
2633 | } | |
2634 | ||
0c8effa3 TT |
2635 | value * |
2636 | var_msym_value_operation::evaluate_for_sizeof (struct expression *exp, | |
2637 | enum noside noside) | |
2638 | ||
2639 | { | |
9c79936b TT |
2640 | const bound_minimal_symbol &b = std::get<0> (m_storage); |
2641 | value *mval = evaluate_var_msym_value (noside, b.objfile, b.minsym); | |
0c8effa3 TT |
2642 | |
2643 | struct type *type = value_type (mval); | |
2644 | if (type->code () == TYPE_CODE_ERROR) | |
9c79936b | 2645 | error_unknown_type (b.minsym->print_name ()); |
0c8effa3 TT |
2646 | |
2647 | /* FIXME: This should be size_t. */ | |
2648 | struct type *size_type = builtin_type (exp->gdbarch)->builtin_int; | |
2649 | return value_from_longest (size_type, TYPE_LENGTH (type)); | |
2650 | } | |
2651 | ||
224d6424 TT |
2652 | value * |
2653 | subscript_operation::evaluate_for_sizeof (struct expression *exp, | |
2654 | enum noside noside) | |
2655 | { | |
2656 | if (noside == EVAL_NORMAL) | |
2657 | { | |
2658 | value *val = std::get<0> (m_storage)->evaluate (nullptr, exp, | |
2659 | EVAL_AVOID_SIDE_EFFECTS); | |
2660 | struct type *type = check_typedef (value_type (val)); | |
2661 | if (type->code () == TYPE_CODE_ARRAY) | |
2662 | { | |
2663 | type = check_typedef (TYPE_TARGET_TYPE (type)); | |
2664 | if (type->code () == TYPE_CODE_ARRAY) | |
2665 | { | |
2666 | type = type->index_type (); | |
2667 | /* Only re-evaluate the right hand side if the resulting type | |
2668 | is a variable length type. */ | |
2669 | if (type->bounds ()->flag_bound_evaluated) | |
2670 | { | |
2671 | val = evaluate (nullptr, exp, EVAL_NORMAL); | |
2672 | /* FIXME: This should be size_t. */ | |
2673 | struct type *size_type | |
2674 | = builtin_type (exp->gdbarch)->builtin_int; | |
2675 | return value_from_longest | |
2676 | (size_type, (LONGEST) TYPE_LENGTH (value_type (val))); | |
2677 | } | |
2678 | } | |
2679 | } | |
2680 | } | |
2681 | ||
2682 | return operation::evaluate_for_sizeof (exp, noside); | |
2683 | } | |
2684 | ||
876469ff TT |
2685 | value * |
2686 | unop_ind_base_operation::evaluate_for_sizeof (struct expression *exp, | |
2687 | enum noside noside) | |
2688 | { | |
2689 | value *val = std::get<0> (m_storage)->evaluate (nullptr, exp, | |
2690 | EVAL_AVOID_SIDE_EFFECTS); | |
2691 | struct type *type = check_typedef (value_type (val)); | |
2692 | if (type->code () != TYPE_CODE_PTR | |
2693 | && !TYPE_IS_REFERENCE (type) | |
2694 | && type->code () != TYPE_CODE_ARRAY) | |
2695 | error (_("Attempt to take contents of a non-pointer value.")); | |
2696 | type = TYPE_TARGET_TYPE (type); | |
2697 | if (is_dynamic_type (type)) | |
2698 | type = value_type (value_ind (val)); | |
2699 | /* FIXME: This should be size_t. */ | |
2700 | struct type *size_type = builtin_type (exp->gdbarch)->builtin_int; | |
2701 | return value_from_longest (size_type, (LONGEST) TYPE_LENGTH (type)); | |
2702 | } | |
2703 | ||
cbc18219 TT |
2704 | value * |
2705 | unop_memval_operation::evaluate_for_sizeof (struct expression *exp, | |
2706 | enum noside noside) | |
2707 | { | |
2708 | return evaluate_subexp_for_sizeof_base (exp, std::get<1> (m_storage)); | |
2709 | } | |
2710 | ||
2711 | value * | |
2712 | unop_memval_type_operation::evaluate_for_sizeof (struct expression *exp, | |
2713 | enum noside noside) | |
2714 | { | |
2715 | value *typeval = std::get<0> (m_storage)->evaluate (nullptr, exp, | |
2716 | EVAL_AVOID_SIDE_EFFECTS); | |
2717 | return evaluate_subexp_for_sizeof_base (exp, value_type (typeval)); | |
2718 | } | |
2719 | ||
e82a5afc TT |
2720 | value * |
2721 | var_value_operation::evaluate_for_sizeof (struct expression *exp, | |
2722 | enum noside noside) | |
2723 | { | |
2724 | struct type *type = SYMBOL_TYPE (std::get<0> (m_storage)); | |
2725 | if (is_dynamic_type (type)) | |
2726 | { | |
2727 | value *val = evaluate (nullptr, exp, EVAL_NORMAL); | |
2728 | type = value_type (val); | |
2729 | if (type->code () == TYPE_CODE_ARRAY) | |
2730 | { | |
2731 | /* FIXME: This should be size_t. */ | |
2732 | struct type *size_type = builtin_type (exp->gdbarch)->builtin_int; | |
2733 | if (type_not_allocated (type) || type_not_associated (type)) | |
2734 | return value_zero (size_type, not_lval); | |
2735 | else if (is_dynamic_type (type->index_type ()) | |
2736 | && type->bounds ()->high.kind () == PROP_UNDEFINED) | |
2737 | return allocate_optimized_out_value (size_type); | |
2738 | } | |
2739 | } | |
2740 | return evaluate_subexp_for_sizeof_base (exp, type); | |
2741 | } | |
2742 | ||
0c8effa3 TT |
2743 | value * |
2744 | var_msym_value_operation::evaluate_for_cast (struct type *to_type, | |
2745 | struct expression *exp, | |
2746 | enum noside noside) | |
2747 | { | |
2748 | if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
2749 | return value_zero (to_type, not_lval); | |
2750 | ||
9c79936b TT |
2751 | const bound_minimal_symbol &b = std::get<0> (m_storage); |
2752 | value *val = evaluate_var_msym_value (noside, b.objfile, b.minsym); | |
0c8effa3 | 2753 | |
0c8effa3 TT |
2754 | val = value_cast (to_type, val); |
2755 | ||
2756 | /* Don't allow e.g. '&(int)var_with_no_debug_info'. */ | |
2757 | if (VALUE_LVAL (val) == lval_memory) | |
2758 | { | |
2759 | if (value_lazy (val)) | |
2760 | value_fetch_lazy (val); | |
2761 | VALUE_LVAL (val) = not_lval; | |
2762 | } | |
2763 | return val; | |
2764 | } | |
2765 | ||
e82a5afc TT |
2766 | value * |
2767 | var_value_operation::evaluate_for_cast (struct type *to_type, | |
2768 | struct expression *exp, | |
2769 | enum noside noside) | |
2770 | { | |
2771 | value *val = evaluate_var_value (noside, | |
2772 | std::get<1> (m_storage), | |
2773 | std::get<0> (m_storage)); | |
2774 | ||
e82a5afc TT |
2775 | val = value_cast (to_type, val); |
2776 | ||
2777 | /* Don't allow e.g. '&(int)var_with_no_debug_info'. */ | |
2778 | if (VALUE_LVAL (val) == lval_memory) | |
2779 | { | |
2780 | if (value_lazy (val)) | |
2781 | value_fetch_lazy (val); | |
2782 | VALUE_LVAL (val) = not_lval; | |
2783 | } | |
2784 | return val; | |
2785 | } | |
2786 | ||
0c8effa3 TT |
2787 | } |
2788 | ||
0963b4bd | 2789 | /* Parse a type expression in the string [P..P+LENGTH). */ |
c906108c SS |
2790 | |
2791 | struct type * | |
f5756acc | 2792 | parse_and_eval_type (const char *p, int length) |
c906108c | 2793 | { |
c5aa993b | 2794 | char *tmp = (char *) alloca (length + 4); |
d7f9d729 | 2795 | |
c5aa993b JM |
2796 | tmp[0] = '('; |
2797 | memcpy (tmp + 1, p, length); | |
2798 | tmp[length + 1] = ')'; | |
2799 | tmp[length + 2] = '0'; | |
2800 | tmp[length + 3] = '\0'; | |
4d01a485 | 2801 | expression_up expr = parse_expression (tmp); |
1eaebe02 TT |
2802 | expr::unop_cast_operation *op |
2803 | = dynamic_cast<expr::unop_cast_operation *> (expr->op.get ()); | |
2804 | if (op == nullptr) | |
8a3fe4f8 | 2805 | error (_("Internal error in eval_type.")); |
1eaebe02 | 2806 | return op->get_type (); |
c906108c | 2807 | } |