Commit | Line | Data |
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c906108c | 1 | /* Perform non-arithmetic operations on values, for GDB. |
990a07ab | 2 | |
61baf725 | 3 | Copyright (C) 1986-2017 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" | |
21 | #include "symtab.h" | |
22 | #include "gdbtypes.h" | |
23 | #include "value.h" | |
24 | #include "frame.h" | |
25 | #include "inferior.h" | |
26 | #include "gdbcore.h" | |
27 | #include "target.h" | |
28 | #include "demangle.h" | |
29 | #include "language.h" | |
30 | #include "gdbcmd.h" | |
4e052eda | 31 | #include "regcache.h" |
015a42b4 | 32 | #include "cp-abi.h" |
fe898f56 | 33 | #include "block.h" |
04714b91 | 34 | #include "infcall.h" |
de4f826b | 35 | #include "dictionary.h" |
b6429628 | 36 | #include "cp-support.h" |
4ef30785 | 37 | #include "dfp.h" |
e6ca34fc | 38 | #include "tracepoint.h" |
f4c5303c | 39 | #include "observer.h" |
3e3b026f | 40 | #include "objfiles.h" |
233e8b28 | 41 | #include "extension.h" |
c906108c | 42 | |
ccce17b0 | 43 | extern unsigned int overload_debug; |
c906108c SS |
44 | /* Local functions. */ |
45 | ||
ad2f7632 DJ |
46 | static int typecmp (int staticp, int varargs, int nargs, |
47 | struct field t1[], struct value *t2[]); | |
c906108c | 48 | |
714f19d5 | 49 | static struct value *search_struct_field (const char *, struct value *, |
8a13d42d | 50 | struct type *, int); |
c906108c | 51 | |
714f19d5 TT |
52 | static struct value *search_struct_method (const char *, struct value **, |
53 | struct value **, | |
6b850546 | 54 | LONGEST, int *, struct type *); |
c906108c | 55 | |
da096638 | 56 | static int find_oload_champ_namespace (struct value **, int, |
ac3eeb49 MS |
57 | const char *, const char *, |
58 | struct symbol ***, | |
7322dca9 SW |
59 | struct badness_vector **, |
60 | const int no_adl); | |
8d577d32 DC |
61 | |
62 | static | |
da096638 | 63 | int find_oload_champ_namespace_loop (struct value **, int, |
ac3eeb49 MS |
64 | const char *, const char *, |
65 | int, struct symbol ***, | |
7322dca9 SW |
66 | struct badness_vector **, int *, |
67 | const int no_adl); | |
ac3eeb49 | 68 | |
9cf95373 | 69 | static int find_oload_champ (struct value **, int, int, |
233e8b28 SC |
70 | struct fn_field *, VEC (xmethod_worker_ptr) *, |
71 | struct symbol **, struct badness_vector **); | |
ac3eeb49 | 72 | |
2bca57ba | 73 | static int oload_method_static_p (struct fn_field *, int); |
8d577d32 DC |
74 | |
75 | enum oload_classification { STANDARD, NON_STANDARD, INCOMPATIBLE }; | |
76 | ||
77 | static enum | |
ac3eeb49 MS |
78 | oload_classification classify_oload_match (struct badness_vector *, |
79 | int, int); | |
8d577d32 | 80 | |
ac3eeb49 MS |
81 | static struct value *value_struct_elt_for_reference (struct type *, |
82 | int, struct type *, | |
c848d642 | 83 | const char *, |
ac3eeb49 MS |
84 | struct type *, |
85 | int, enum noside); | |
79c2c32d | 86 | |
ac3eeb49 | 87 | static struct value *value_namespace_elt (const struct type *, |
c848d642 | 88 | const char *, int , enum noside); |
79c2c32d | 89 | |
ac3eeb49 | 90 | static struct value *value_maybe_namespace_elt (const struct type *, |
c848d642 | 91 | const char *, int, |
ac3eeb49 | 92 | enum noside); |
63d06c5c | 93 | |
a14ed312 | 94 | static CORE_ADDR allocate_space_in_inferior (int); |
c906108c | 95 | |
f23631e4 | 96 | static struct value *cast_into_complex (struct type *, struct value *); |
c906108c | 97 | |
233e8b28 | 98 | static void find_method_list (struct value **, const char *, |
6b850546 | 99 | LONGEST, struct type *, struct fn_field **, int *, |
233e8b28 | 100 | VEC (xmethod_worker_ptr) **, |
6b850546 | 101 | struct type **, LONGEST *); |
7a292a7a | 102 | |
a14ed312 | 103 | void _initialize_valops (void); |
c906108c | 104 | |
c906108c | 105 | #if 0 |
ac3eeb49 MS |
106 | /* Flag for whether we want to abandon failed expression evals by |
107 | default. */ | |
108 | ||
c906108c SS |
109 | static int auto_abandon = 0; |
110 | #endif | |
111 | ||
112 | int overload_resolution = 0; | |
920d2a44 AC |
113 | static void |
114 | show_overload_resolution (struct ui_file *file, int from_tty, | |
ac3eeb49 MS |
115 | struct cmd_list_element *c, |
116 | const char *value) | |
920d2a44 | 117 | { |
3e43a32a MS |
118 | fprintf_filtered (file, _("Overload resolution in evaluating " |
119 | "C++ functions is %s.\n"), | |
920d2a44 AC |
120 | value); |
121 | } | |
242bfc55 | 122 | |
3e3b026f UW |
123 | /* Find the address of function name NAME in the inferior. If OBJF_P |
124 | is non-NULL, *OBJF_P will be set to the OBJFILE where the function | |
125 | is defined. */ | |
c906108c | 126 | |
f23631e4 | 127 | struct value * |
3e3b026f | 128 | find_function_in_inferior (const char *name, struct objfile **objf_p) |
c906108c | 129 | { |
d12307c1 | 130 | struct block_symbol sym; |
a109c7c1 | 131 | |
2570f2b7 | 132 | sym = lookup_symbol (name, 0, VAR_DOMAIN, 0); |
d12307c1 | 133 | if (sym.symbol != NULL) |
c906108c | 134 | { |
d12307c1 | 135 | if (SYMBOL_CLASS (sym.symbol) != LOC_BLOCK) |
c906108c | 136 | { |
8a3fe4f8 | 137 | error (_("\"%s\" exists in this program but is not a function."), |
c906108c SS |
138 | name); |
139 | } | |
3e3b026f UW |
140 | |
141 | if (objf_p) | |
d12307c1 | 142 | *objf_p = symbol_objfile (sym.symbol); |
3e3b026f | 143 | |
d12307c1 | 144 | return value_of_variable (sym.symbol, sym.block); |
c906108c SS |
145 | } |
146 | else | |
147 | { | |
7c7b6655 TT |
148 | struct bound_minimal_symbol msymbol = |
149 | lookup_bound_minimal_symbol (name); | |
a109c7c1 | 150 | |
7c7b6655 | 151 | if (msymbol.minsym != NULL) |
c906108c | 152 | { |
7c7b6655 | 153 | struct objfile *objfile = msymbol.objfile; |
3e3b026f UW |
154 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
155 | ||
c906108c | 156 | struct type *type; |
4478b372 | 157 | CORE_ADDR maddr; |
3e3b026f | 158 | type = lookup_pointer_type (builtin_type (gdbarch)->builtin_char); |
c906108c SS |
159 | type = lookup_function_type (type); |
160 | type = lookup_pointer_type (type); | |
77e371c0 | 161 | maddr = BMSYMBOL_VALUE_ADDRESS (msymbol); |
3e3b026f UW |
162 | |
163 | if (objf_p) | |
164 | *objf_p = objfile; | |
165 | ||
4478b372 | 166 | return value_from_pointer (type, maddr); |
c906108c SS |
167 | } |
168 | else | |
169 | { | |
c5aa993b | 170 | if (!target_has_execution) |
3e43a32a MS |
171 | error (_("evaluation of this expression " |
172 | "requires the target program to be active")); | |
c5aa993b | 173 | else |
3e43a32a MS |
174 | error (_("evaluation of this expression requires the " |
175 | "program to have a function \"%s\"."), | |
176 | name); | |
c906108c SS |
177 | } |
178 | } | |
179 | } | |
180 | ||
ac3eeb49 MS |
181 | /* Allocate NBYTES of space in the inferior using the inferior's |
182 | malloc and return a value that is a pointer to the allocated | |
183 | space. */ | |
c906108c | 184 | |
f23631e4 | 185 | struct value * |
fba45db2 | 186 | value_allocate_space_in_inferior (int len) |
c906108c | 187 | { |
3e3b026f UW |
188 | struct objfile *objf; |
189 | struct value *val = find_function_in_inferior ("malloc", &objf); | |
190 | struct gdbarch *gdbarch = get_objfile_arch (objf); | |
f23631e4 | 191 | struct value *blocklen; |
c906108c | 192 | |
3e3b026f | 193 | blocklen = value_from_longest (builtin_type (gdbarch)->builtin_int, len); |
c906108c SS |
194 | val = call_function_by_hand (val, 1, &blocklen); |
195 | if (value_logical_not (val)) | |
196 | { | |
197 | if (!target_has_execution) | |
3e43a32a MS |
198 | error (_("No memory available to program now: " |
199 | "you need to start the target first")); | |
c5aa993b | 200 | else |
8a3fe4f8 | 201 | error (_("No memory available to program: call to malloc failed")); |
c906108c SS |
202 | } |
203 | return val; | |
204 | } | |
205 | ||
206 | static CORE_ADDR | |
fba45db2 | 207 | allocate_space_in_inferior (int len) |
c906108c SS |
208 | { |
209 | return value_as_long (value_allocate_space_in_inferior (len)); | |
210 | } | |
211 | ||
6af87b03 AR |
212 | /* Cast struct value VAL to type TYPE and return as a value. |
213 | Both type and val must be of TYPE_CODE_STRUCT or TYPE_CODE_UNION | |
694182d2 DJ |
214 | for this to work. Typedef to one of the codes is permitted. |
215 | Returns NULL if the cast is neither an upcast nor a downcast. */ | |
6af87b03 AR |
216 | |
217 | static struct value * | |
218 | value_cast_structs (struct type *type, struct value *v2) | |
219 | { | |
220 | struct type *t1; | |
221 | struct type *t2; | |
222 | struct value *v; | |
223 | ||
224 | gdb_assert (type != NULL && v2 != NULL); | |
225 | ||
226 | t1 = check_typedef (type); | |
227 | t2 = check_typedef (value_type (v2)); | |
228 | ||
229 | /* Check preconditions. */ | |
230 | gdb_assert ((TYPE_CODE (t1) == TYPE_CODE_STRUCT | |
231 | || TYPE_CODE (t1) == TYPE_CODE_UNION) | |
232 | && !!"Precondition is that type is of STRUCT or UNION kind."); | |
233 | gdb_assert ((TYPE_CODE (t2) == TYPE_CODE_STRUCT | |
234 | || TYPE_CODE (t2) == TYPE_CODE_UNION) | |
235 | && !!"Precondition is that value is of STRUCT or UNION kind"); | |
236 | ||
191ca0a1 CM |
237 | if (TYPE_NAME (t1) != NULL |
238 | && TYPE_NAME (t2) != NULL | |
239 | && !strcmp (TYPE_NAME (t1), TYPE_NAME (t2))) | |
240 | return NULL; | |
241 | ||
6af87b03 AR |
242 | /* Upcasting: look in the type of the source to see if it contains the |
243 | type of the target as a superclass. If so, we'll need to | |
244 | offset the pointer rather than just change its type. */ | |
245 | if (TYPE_NAME (t1) != NULL) | |
246 | { | |
247 | v = search_struct_field (type_name_no_tag (t1), | |
8a13d42d | 248 | v2, t2, 1); |
6af87b03 AR |
249 | if (v) |
250 | return v; | |
251 | } | |
252 | ||
253 | /* Downcasting: look in the type of the target to see if it contains the | |
254 | type of the source as a superclass. If so, we'll need to | |
9c3c02fd | 255 | offset the pointer rather than just change its type. */ |
6af87b03 AR |
256 | if (TYPE_NAME (t2) != NULL) |
257 | { | |
9c3c02fd | 258 | /* Try downcasting using the run-time type of the value. */ |
6b850546 DT |
259 | int full, using_enc; |
260 | LONGEST top; | |
9c3c02fd TT |
261 | struct type *real_type; |
262 | ||
263 | real_type = value_rtti_type (v2, &full, &top, &using_enc); | |
264 | if (real_type) | |
265 | { | |
266 | v = value_full_object (v2, real_type, full, top, using_enc); | |
267 | v = value_at_lazy (real_type, value_address (v)); | |
9f1f738a | 268 | real_type = value_type (v); |
9c3c02fd TT |
269 | |
270 | /* We might be trying to cast to the outermost enclosing | |
271 | type, in which case search_struct_field won't work. */ | |
272 | if (TYPE_NAME (real_type) != NULL | |
273 | && !strcmp (TYPE_NAME (real_type), TYPE_NAME (t1))) | |
274 | return v; | |
275 | ||
8a13d42d | 276 | v = search_struct_field (type_name_no_tag (t2), v, real_type, 1); |
9c3c02fd TT |
277 | if (v) |
278 | return v; | |
279 | } | |
280 | ||
281 | /* Try downcasting using information from the destination type | |
282 | T2. This wouldn't work properly for classes with virtual | |
283 | bases, but those were handled above. */ | |
6af87b03 | 284 | v = search_struct_field (type_name_no_tag (t2), |
8a13d42d | 285 | value_zero (t1, not_lval), t1, 1); |
6af87b03 AR |
286 | if (v) |
287 | { | |
288 | /* Downcasting is possible (t1 is superclass of v2). */ | |
42ae5230 | 289 | CORE_ADDR addr2 = value_address (v2); |
a109c7c1 | 290 | |
42ae5230 | 291 | addr2 -= value_address (v) + value_embedded_offset (v); |
6af87b03 AR |
292 | return value_at (type, addr2); |
293 | } | |
294 | } | |
694182d2 DJ |
295 | |
296 | return NULL; | |
6af87b03 AR |
297 | } |
298 | ||
fb933624 DJ |
299 | /* Cast one pointer or reference type to another. Both TYPE and |
300 | the type of ARG2 should be pointer types, or else both should be | |
b1af9e97 TT |
301 | reference types. If SUBCLASS_CHECK is non-zero, this will force a |
302 | check to see whether TYPE is a superclass of ARG2's type. If | |
303 | SUBCLASS_CHECK is zero, then the subclass check is done only when | |
304 | ARG2 is itself non-zero. Returns the new pointer or reference. */ | |
fb933624 DJ |
305 | |
306 | struct value * | |
b1af9e97 TT |
307 | value_cast_pointers (struct type *type, struct value *arg2, |
308 | int subclass_check) | |
fb933624 | 309 | { |
d160942f | 310 | struct type *type1 = check_typedef (type); |
fb933624 | 311 | struct type *type2 = check_typedef (value_type (arg2)); |
d160942f | 312 | struct type *t1 = check_typedef (TYPE_TARGET_TYPE (type1)); |
fb933624 DJ |
313 | struct type *t2 = check_typedef (TYPE_TARGET_TYPE (type2)); |
314 | ||
315 | if (TYPE_CODE (t1) == TYPE_CODE_STRUCT | |
316 | && TYPE_CODE (t2) == TYPE_CODE_STRUCT | |
b1af9e97 | 317 | && (subclass_check || !value_logical_not (arg2))) |
fb933624 | 318 | { |
6af87b03 | 319 | struct value *v2; |
fb933624 | 320 | |
aa006118 | 321 | if (TYPE_IS_REFERENCE (type2)) |
6af87b03 AR |
322 | v2 = coerce_ref (arg2); |
323 | else | |
324 | v2 = value_ind (arg2); | |
3e43a32a MS |
325 | gdb_assert (TYPE_CODE (check_typedef (value_type (v2))) |
326 | == TYPE_CODE_STRUCT && !!"Why did coercion fail?"); | |
6af87b03 AR |
327 | v2 = value_cast_structs (t1, v2); |
328 | /* At this point we have what we can have, un-dereference if needed. */ | |
329 | if (v2) | |
fb933624 | 330 | { |
6af87b03 | 331 | struct value *v = value_addr (v2); |
a109c7c1 | 332 | |
6af87b03 AR |
333 | deprecated_set_value_type (v, type); |
334 | return v; | |
fb933624 | 335 | } |
8301c89e | 336 | } |
fb933624 DJ |
337 | |
338 | /* No superclass found, just change the pointer type. */ | |
0d5de010 | 339 | arg2 = value_copy (arg2); |
fb933624 | 340 | deprecated_set_value_type (arg2, type); |
4dfea560 | 341 | set_value_enclosing_type (arg2, type); |
fb933624 DJ |
342 | set_value_pointed_to_offset (arg2, 0); /* pai: chk_val */ |
343 | return arg2; | |
344 | } | |
345 | ||
c906108c SS |
346 | /* Cast value ARG2 to type TYPE and return as a value. |
347 | More general than a C cast: accepts any two types of the same length, | |
348 | and if ARG2 is an lvalue it can be cast into anything at all. */ | |
349 | /* In C++, casts may change pointer or object representations. */ | |
350 | ||
f23631e4 AC |
351 | struct value * |
352 | value_cast (struct type *type, struct value *arg2) | |
c906108c | 353 | { |
52f0bd74 AC |
354 | enum type_code code1; |
355 | enum type_code code2; | |
356 | int scalar; | |
c906108c SS |
357 | struct type *type2; |
358 | ||
359 | int convert_to_boolean = 0; | |
c5aa993b | 360 | |
df407dfe | 361 | if (value_type (arg2) == type) |
c906108c SS |
362 | return arg2; |
363 | ||
6af87b03 | 364 | /* Check if we are casting struct reference to struct reference. */ |
aa006118 | 365 | if (TYPE_IS_REFERENCE (check_typedef (type))) |
6af87b03 AR |
366 | { |
367 | /* We dereference type; then we recurse and finally | |
581e13c1 | 368 | we generate value of the given reference. Nothing wrong with |
6af87b03 AR |
369 | that. */ |
370 | struct type *t1 = check_typedef (type); | |
371 | struct type *dereftype = check_typedef (TYPE_TARGET_TYPE (t1)); | |
aa006118 | 372 | struct value *val = value_cast (dereftype, arg2); |
a109c7c1 | 373 | |
a65cfae5 | 374 | return value_ref (val, TYPE_CODE (t1)); |
6af87b03 AR |
375 | } |
376 | ||
aa006118 | 377 | if (TYPE_IS_REFERENCE (check_typedef (value_type (arg2)))) |
6af87b03 AR |
378 | /* We deref the value and then do the cast. */ |
379 | return value_cast (type, coerce_ref (arg2)); | |
380 | ||
f168693b | 381 | type = check_typedef (type); |
c906108c | 382 | code1 = TYPE_CODE (type); |
994b9211 | 383 | arg2 = coerce_ref (arg2); |
df407dfe | 384 | type2 = check_typedef (value_type (arg2)); |
c906108c | 385 | |
fb933624 DJ |
386 | /* You can't cast to a reference type. See value_cast_pointers |
387 | instead. */ | |
aa006118 | 388 | gdb_assert (!TYPE_IS_REFERENCE (type)); |
fb933624 | 389 | |
ac3eeb49 MS |
390 | /* A cast to an undetermined-length array_type, such as |
391 | (TYPE [])OBJECT, is treated like a cast to (TYPE [N])OBJECT, | |
392 | where N is sizeof(OBJECT)/sizeof(TYPE). */ | |
c906108c SS |
393 | if (code1 == TYPE_CODE_ARRAY) |
394 | { | |
395 | struct type *element_type = TYPE_TARGET_TYPE (type); | |
396 | unsigned element_length = TYPE_LENGTH (check_typedef (element_type)); | |
a109c7c1 | 397 | |
d78df370 | 398 | if (element_length > 0 && TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type)) |
c906108c SS |
399 | { |
400 | struct type *range_type = TYPE_INDEX_TYPE (type); | |
401 | int val_length = TYPE_LENGTH (type2); | |
402 | LONGEST low_bound, high_bound, new_length; | |
a109c7c1 | 403 | |
c906108c SS |
404 | if (get_discrete_bounds (range_type, &low_bound, &high_bound) < 0) |
405 | low_bound = 0, high_bound = 0; | |
406 | new_length = val_length / element_length; | |
407 | if (val_length % element_length != 0) | |
3e43a32a MS |
408 | warning (_("array element type size does not " |
409 | "divide object size in cast")); | |
ac3eeb49 MS |
410 | /* FIXME-type-allocation: need a way to free this type when |
411 | we are done with it. */ | |
0c9c3474 SA |
412 | range_type = create_static_range_type ((struct type *) NULL, |
413 | TYPE_TARGET_TYPE (range_type), | |
414 | low_bound, | |
415 | new_length + low_bound - 1); | |
ac3eeb49 MS |
416 | deprecated_set_value_type (arg2, |
417 | create_array_type ((struct type *) NULL, | |
418 | element_type, | |
419 | range_type)); | |
c906108c SS |
420 | return arg2; |
421 | } | |
422 | } | |
423 | ||
424 | if (current_language->c_style_arrays | |
3bdf2bbd KW |
425 | && TYPE_CODE (type2) == TYPE_CODE_ARRAY |
426 | && !TYPE_VECTOR (type2)) | |
c906108c SS |
427 | arg2 = value_coerce_array (arg2); |
428 | ||
429 | if (TYPE_CODE (type2) == TYPE_CODE_FUNC) | |
430 | arg2 = value_coerce_function (arg2); | |
431 | ||
df407dfe | 432 | type2 = check_typedef (value_type (arg2)); |
c906108c SS |
433 | code2 = TYPE_CODE (type2); |
434 | ||
435 | if (code1 == TYPE_CODE_COMPLEX) | |
436 | return cast_into_complex (type, arg2); | |
437 | if (code1 == TYPE_CODE_BOOL) | |
438 | { | |
439 | code1 = TYPE_CODE_INT; | |
440 | convert_to_boolean = 1; | |
441 | } | |
442 | if (code1 == TYPE_CODE_CHAR) | |
443 | code1 = TYPE_CODE_INT; | |
444 | if (code2 == TYPE_CODE_BOOL || code2 == TYPE_CODE_CHAR) | |
445 | code2 = TYPE_CODE_INT; | |
446 | ||
447 | scalar = (code2 == TYPE_CODE_INT || code2 == TYPE_CODE_FLT | |
4ef30785 TJB |
448 | || code2 == TYPE_CODE_DECFLOAT || code2 == TYPE_CODE_ENUM |
449 | || code2 == TYPE_CODE_RANGE); | |
c906108c | 450 | |
6af87b03 AR |
451 | if ((code1 == TYPE_CODE_STRUCT || code1 == TYPE_CODE_UNION) |
452 | && (code2 == TYPE_CODE_STRUCT || code2 == TYPE_CODE_UNION) | |
c906108c | 453 | && TYPE_NAME (type) != 0) |
694182d2 DJ |
454 | { |
455 | struct value *v = value_cast_structs (type, arg2); | |
a109c7c1 | 456 | |
694182d2 DJ |
457 | if (v) |
458 | return v; | |
459 | } | |
460 | ||
c906108c SS |
461 | if (code1 == TYPE_CODE_FLT && scalar) |
462 | return value_from_double (type, value_as_double (arg2)); | |
4ef30785 TJB |
463 | else if (code1 == TYPE_CODE_DECFLOAT && scalar) |
464 | { | |
e17a4113 | 465 | enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (type)); |
4ef30785 TJB |
466 | int dec_len = TYPE_LENGTH (type); |
467 | gdb_byte dec[16]; | |
468 | ||
469 | if (code2 == TYPE_CODE_FLT) | |
e17a4113 | 470 | decimal_from_floating (arg2, dec, dec_len, byte_order); |
4ef30785 TJB |
471 | else if (code2 == TYPE_CODE_DECFLOAT) |
472 | decimal_convert (value_contents (arg2), TYPE_LENGTH (type2), | |
e17a4113 | 473 | byte_order, dec, dec_len, byte_order); |
4ef30785 TJB |
474 | else |
475 | /* The only option left is an integral type. */ | |
e17a4113 | 476 | decimal_from_integral (arg2, dec, dec_len, byte_order); |
4ef30785 TJB |
477 | |
478 | return value_from_decfloat (type, dec); | |
479 | } | |
c906108c SS |
480 | else if ((code1 == TYPE_CODE_INT || code1 == TYPE_CODE_ENUM |
481 | || code1 == TYPE_CODE_RANGE) | |
0d5de010 DJ |
482 | && (scalar || code2 == TYPE_CODE_PTR |
483 | || code2 == TYPE_CODE_MEMBERPTR)) | |
c906108c SS |
484 | { |
485 | LONGEST longest; | |
c5aa993b | 486 | |
2bf1f4a1 | 487 | /* When we cast pointers to integers, we mustn't use |
76e71323 | 488 | gdbarch_pointer_to_address to find the address the pointer |
2bf1f4a1 JB |
489 | represents, as value_as_long would. GDB should evaluate |
490 | expressions just as the compiler would --- and the compiler | |
491 | sees a cast as a simple reinterpretation of the pointer's | |
492 | bits. */ | |
493 | if (code2 == TYPE_CODE_PTR) | |
e17a4113 UW |
494 | longest = extract_unsigned_integer |
495 | (value_contents (arg2), TYPE_LENGTH (type2), | |
496 | gdbarch_byte_order (get_type_arch (type2))); | |
2bf1f4a1 JB |
497 | else |
498 | longest = value_as_long (arg2); | |
802db21b | 499 | return value_from_longest (type, convert_to_boolean ? |
716c501e | 500 | (LONGEST) (longest ? 1 : 0) : longest); |
c906108c | 501 | } |
ac3eeb49 MS |
502 | else if (code1 == TYPE_CODE_PTR && (code2 == TYPE_CODE_INT |
503 | || code2 == TYPE_CODE_ENUM | |
504 | || code2 == TYPE_CODE_RANGE)) | |
634acd5f | 505 | { |
4603e466 DT |
506 | /* TYPE_LENGTH (type) is the length of a pointer, but we really |
507 | want the length of an address! -- we are really dealing with | |
508 | addresses (i.e., gdb representations) not pointers (i.e., | |
509 | target representations) here. | |
510 | ||
511 | This allows things like "print *(int *)0x01000234" to work | |
512 | without printing a misleading message -- which would | |
513 | otherwise occur when dealing with a target having two byte | |
514 | pointers and four byte addresses. */ | |
515 | ||
50810684 | 516 | int addr_bit = gdbarch_addr_bit (get_type_arch (type2)); |
634acd5f | 517 | LONGEST longest = value_as_long (arg2); |
a109c7c1 | 518 | |
4603e466 | 519 | if (addr_bit < sizeof (LONGEST) * HOST_CHAR_BIT) |
634acd5f | 520 | { |
4603e466 DT |
521 | if (longest >= ((LONGEST) 1 << addr_bit) |
522 | || longest <= -((LONGEST) 1 << addr_bit)) | |
8a3fe4f8 | 523 | warning (_("value truncated")); |
634acd5f AC |
524 | } |
525 | return value_from_longest (type, longest); | |
526 | } | |
0d5de010 DJ |
527 | else if (code1 == TYPE_CODE_METHODPTR && code2 == TYPE_CODE_INT |
528 | && value_as_long (arg2) == 0) | |
529 | { | |
530 | struct value *result = allocate_value (type); | |
a109c7c1 | 531 | |
ad4820ab | 532 | cplus_make_method_ptr (type, value_contents_writeable (result), 0, 0); |
0d5de010 DJ |
533 | return result; |
534 | } | |
535 | else if (code1 == TYPE_CODE_MEMBERPTR && code2 == TYPE_CODE_INT | |
536 | && value_as_long (arg2) == 0) | |
537 | { | |
538 | /* The Itanium C++ ABI represents NULL pointers to members as | |
539 | minus one, instead of biasing the normal case. */ | |
540 | return value_from_longest (type, -1); | |
541 | } | |
8954db33 AB |
542 | else if (code1 == TYPE_CODE_ARRAY && TYPE_VECTOR (type) |
543 | && code2 == TYPE_CODE_ARRAY && TYPE_VECTOR (type2) | |
544 | && TYPE_LENGTH (type) != TYPE_LENGTH (type2)) | |
545 | error (_("Cannot convert between vector values of different sizes")); | |
546 | else if (code1 == TYPE_CODE_ARRAY && TYPE_VECTOR (type) && scalar | |
547 | && TYPE_LENGTH (type) != TYPE_LENGTH (type2)) | |
548 | error (_("can only cast scalar to vector of same size")); | |
0ba2eb0f TT |
549 | else if (code1 == TYPE_CODE_VOID) |
550 | { | |
551 | return value_zero (type, not_lval); | |
552 | } | |
c906108c SS |
553 | else if (TYPE_LENGTH (type) == TYPE_LENGTH (type2)) |
554 | { | |
555 | if (code1 == TYPE_CODE_PTR && code2 == TYPE_CODE_PTR) | |
b1af9e97 | 556 | return value_cast_pointers (type, arg2, 0); |
fb933624 | 557 | |
0d5de010 | 558 | arg2 = value_copy (arg2); |
04624583 | 559 | deprecated_set_value_type (arg2, type); |
4dfea560 | 560 | set_value_enclosing_type (arg2, type); |
b44d461b | 561 | set_value_pointed_to_offset (arg2, 0); /* pai: chk_val */ |
c906108c SS |
562 | return arg2; |
563 | } | |
c906108c | 564 | else if (VALUE_LVAL (arg2) == lval_memory) |
42ae5230 | 565 | return value_at_lazy (type, value_address (arg2)); |
c906108c SS |
566 | else |
567 | { | |
8a3fe4f8 | 568 | error (_("Invalid cast.")); |
c906108c SS |
569 | return 0; |
570 | } | |
571 | } | |
572 | ||
4e8f195d TT |
573 | /* The C++ reinterpret_cast operator. */ |
574 | ||
575 | struct value * | |
576 | value_reinterpret_cast (struct type *type, struct value *arg) | |
577 | { | |
578 | struct value *result; | |
579 | struct type *real_type = check_typedef (type); | |
580 | struct type *arg_type, *dest_type; | |
581 | int is_ref = 0; | |
582 | enum type_code dest_code, arg_code; | |
583 | ||
584 | /* Do reference, function, and array conversion. */ | |
585 | arg = coerce_array (arg); | |
586 | ||
587 | /* Attempt to preserve the type the user asked for. */ | |
588 | dest_type = type; | |
589 | ||
590 | /* If we are casting to a reference type, transform | |
aa006118 AV |
591 | reinterpret_cast<T&[&]>(V) to *reinterpret_cast<T*>(&V). */ |
592 | if (TYPE_IS_REFERENCE (real_type)) | |
4e8f195d TT |
593 | { |
594 | is_ref = 1; | |
595 | arg = value_addr (arg); | |
596 | dest_type = lookup_pointer_type (TYPE_TARGET_TYPE (dest_type)); | |
597 | real_type = lookup_pointer_type (real_type); | |
598 | } | |
599 | ||
600 | arg_type = value_type (arg); | |
601 | ||
602 | dest_code = TYPE_CODE (real_type); | |
603 | arg_code = TYPE_CODE (arg_type); | |
604 | ||
605 | /* We can convert pointer types, or any pointer type to int, or int | |
606 | type to pointer. */ | |
607 | if ((dest_code == TYPE_CODE_PTR && arg_code == TYPE_CODE_INT) | |
608 | || (dest_code == TYPE_CODE_INT && arg_code == TYPE_CODE_PTR) | |
609 | || (dest_code == TYPE_CODE_METHODPTR && arg_code == TYPE_CODE_INT) | |
610 | || (dest_code == TYPE_CODE_INT && arg_code == TYPE_CODE_METHODPTR) | |
611 | || (dest_code == TYPE_CODE_MEMBERPTR && arg_code == TYPE_CODE_INT) | |
612 | || (dest_code == TYPE_CODE_INT && arg_code == TYPE_CODE_MEMBERPTR) | |
613 | || (dest_code == arg_code | |
614 | && (dest_code == TYPE_CODE_PTR | |
615 | || dest_code == TYPE_CODE_METHODPTR | |
616 | || dest_code == TYPE_CODE_MEMBERPTR))) | |
617 | result = value_cast (dest_type, arg); | |
618 | else | |
619 | error (_("Invalid reinterpret_cast")); | |
620 | ||
621 | if (is_ref) | |
a65cfae5 AV |
622 | result = value_cast (type, value_ref (value_ind (result), |
623 | TYPE_CODE (type))); | |
4e8f195d TT |
624 | |
625 | return result; | |
626 | } | |
627 | ||
628 | /* A helper for value_dynamic_cast. This implements the first of two | |
629 | runtime checks: we iterate over all the base classes of the value's | |
630 | class which are equal to the desired class; if only one of these | |
631 | holds the value, then it is the answer. */ | |
632 | ||
633 | static int | |
634 | dynamic_cast_check_1 (struct type *desired_type, | |
8af8e3bc | 635 | const gdb_byte *valaddr, |
6b850546 | 636 | LONGEST embedded_offset, |
4e8f195d | 637 | CORE_ADDR address, |
8af8e3bc | 638 | struct value *val, |
4e8f195d TT |
639 | struct type *search_type, |
640 | CORE_ADDR arg_addr, | |
641 | struct type *arg_type, | |
642 | struct value **result) | |
643 | { | |
644 | int i, result_count = 0; | |
645 | ||
646 | for (i = 0; i < TYPE_N_BASECLASSES (search_type) && result_count < 2; ++i) | |
647 | { | |
6b850546 DT |
648 | LONGEST offset = baseclass_offset (search_type, i, valaddr, |
649 | embedded_offset, | |
650 | address, val); | |
a109c7c1 | 651 | |
4e8f195d TT |
652 | if (class_types_same_p (desired_type, TYPE_BASECLASS (search_type, i))) |
653 | { | |
8af8e3bc PA |
654 | if (address + embedded_offset + offset >= arg_addr |
655 | && address + embedded_offset + offset < arg_addr + TYPE_LENGTH (arg_type)) | |
4e8f195d TT |
656 | { |
657 | ++result_count; | |
658 | if (!*result) | |
659 | *result = value_at_lazy (TYPE_BASECLASS (search_type, i), | |
8af8e3bc | 660 | address + embedded_offset + offset); |
4e8f195d TT |
661 | } |
662 | } | |
663 | else | |
664 | result_count += dynamic_cast_check_1 (desired_type, | |
8af8e3bc PA |
665 | valaddr, |
666 | embedded_offset + offset, | |
667 | address, val, | |
4e8f195d TT |
668 | TYPE_BASECLASS (search_type, i), |
669 | arg_addr, | |
670 | arg_type, | |
671 | result); | |
672 | } | |
673 | ||
674 | return result_count; | |
675 | } | |
676 | ||
677 | /* A helper for value_dynamic_cast. This implements the second of two | |
678 | runtime checks: we look for a unique public sibling class of the | |
679 | argument's declared class. */ | |
680 | ||
681 | static int | |
682 | dynamic_cast_check_2 (struct type *desired_type, | |
8af8e3bc | 683 | const gdb_byte *valaddr, |
6b850546 | 684 | LONGEST embedded_offset, |
4e8f195d | 685 | CORE_ADDR address, |
8af8e3bc | 686 | struct value *val, |
4e8f195d TT |
687 | struct type *search_type, |
688 | struct value **result) | |
689 | { | |
690 | int i, result_count = 0; | |
691 | ||
692 | for (i = 0; i < TYPE_N_BASECLASSES (search_type) && result_count < 2; ++i) | |
693 | { | |
6b850546 | 694 | LONGEST offset; |
4e8f195d TT |
695 | |
696 | if (! BASETYPE_VIA_PUBLIC (search_type, i)) | |
697 | continue; | |
698 | ||
8af8e3bc PA |
699 | offset = baseclass_offset (search_type, i, valaddr, embedded_offset, |
700 | address, val); | |
4e8f195d TT |
701 | if (class_types_same_p (desired_type, TYPE_BASECLASS (search_type, i))) |
702 | { | |
703 | ++result_count; | |
704 | if (*result == NULL) | |
705 | *result = value_at_lazy (TYPE_BASECLASS (search_type, i), | |
8af8e3bc | 706 | address + embedded_offset + offset); |
4e8f195d TT |
707 | } |
708 | else | |
709 | result_count += dynamic_cast_check_2 (desired_type, | |
8af8e3bc PA |
710 | valaddr, |
711 | embedded_offset + offset, | |
712 | address, val, | |
4e8f195d TT |
713 | TYPE_BASECLASS (search_type, i), |
714 | result); | |
715 | } | |
716 | ||
717 | return result_count; | |
718 | } | |
719 | ||
720 | /* The C++ dynamic_cast operator. */ | |
721 | ||
722 | struct value * | |
723 | value_dynamic_cast (struct type *type, struct value *arg) | |
724 | { | |
6b850546 DT |
725 | int full, using_enc; |
726 | LONGEST top; | |
4e8f195d TT |
727 | struct type *resolved_type = check_typedef (type); |
728 | struct type *arg_type = check_typedef (value_type (arg)); | |
729 | struct type *class_type, *rtti_type; | |
730 | struct value *result, *tem, *original_arg = arg; | |
731 | CORE_ADDR addr; | |
aa006118 | 732 | int is_ref = TYPE_IS_REFERENCE (resolved_type); |
4e8f195d TT |
733 | |
734 | if (TYPE_CODE (resolved_type) != TYPE_CODE_PTR | |
aa006118 | 735 | && !TYPE_IS_REFERENCE (resolved_type)) |
4e8f195d TT |
736 | error (_("Argument to dynamic_cast must be a pointer or reference type")); |
737 | if (TYPE_CODE (TYPE_TARGET_TYPE (resolved_type)) != TYPE_CODE_VOID | |
4753d33b | 738 | && TYPE_CODE (TYPE_TARGET_TYPE (resolved_type)) != TYPE_CODE_STRUCT) |
4e8f195d TT |
739 | error (_("Argument to dynamic_cast must be pointer to class or `void *'")); |
740 | ||
741 | class_type = check_typedef (TYPE_TARGET_TYPE (resolved_type)); | |
742 | if (TYPE_CODE (resolved_type) == TYPE_CODE_PTR) | |
743 | { | |
744 | if (TYPE_CODE (arg_type) != TYPE_CODE_PTR | |
745 | && ! (TYPE_CODE (arg_type) == TYPE_CODE_INT | |
746 | && value_as_long (arg) == 0)) | |
747 | error (_("Argument to dynamic_cast does not have pointer type")); | |
748 | if (TYPE_CODE (arg_type) == TYPE_CODE_PTR) | |
749 | { | |
750 | arg_type = check_typedef (TYPE_TARGET_TYPE (arg_type)); | |
4753d33b | 751 | if (TYPE_CODE (arg_type) != TYPE_CODE_STRUCT) |
3e43a32a MS |
752 | error (_("Argument to dynamic_cast does " |
753 | "not have pointer to class type")); | |
4e8f195d TT |
754 | } |
755 | ||
756 | /* Handle NULL pointers. */ | |
757 | if (value_as_long (arg) == 0) | |
758 | return value_zero (type, not_lval); | |
759 | ||
760 | arg = value_ind (arg); | |
761 | } | |
762 | else | |
763 | { | |
4753d33b | 764 | if (TYPE_CODE (arg_type) != TYPE_CODE_STRUCT) |
4e8f195d TT |
765 | error (_("Argument to dynamic_cast does not have class type")); |
766 | } | |
767 | ||
768 | /* If the classes are the same, just return the argument. */ | |
769 | if (class_types_same_p (class_type, arg_type)) | |
770 | return value_cast (type, arg); | |
771 | ||
772 | /* If the target type is a unique base class of the argument's | |
773 | declared type, just cast it. */ | |
774 | if (is_ancestor (class_type, arg_type)) | |
775 | { | |
776 | if (is_unique_ancestor (class_type, arg)) | |
777 | return value_cast (type, original_arg); | |
778 | error (_("Ambiguous dynamic_cast")); | |
779 | } | |
780 | ||
781 | rtti_type = value_rtti_type (arg, &full, &top, &using_enc); | |
782 | if (! rtti_type) | |
783 | error (_("Couldn't determine value's most derived type for dynamic_cast")); | |
784 | ||
785 | /* Compute the most derived object's address. */ | |
786 | addr = value_address (arg); | |
787 | if (full) | |
788 | { | |
789 | /* Done. */ | |
790 | } | |
791 | else if (using_enc) | |
792 | addr += top; | |
793 | else | |
794 | addr += top + value_embedded_offset (arg); | |
795 | ||
796 | /* dynamic_cast<void *> means to return a pointer to the | |
797 | most-derived object. */ | |
798 | if (TYPE_CODE (resolved_type) == TYPE_CODE_PTR | |
799 | && TYPE_CODE (TYPE_TARGET_TYPE (resolved_type)) == TYPE_CODE_VOID) | |
800 | return value_at_lazy (type, addr); | |
801 | ||
802 | tem = value_at (type, addr); | |
9f1f738a | 803 | type = value_type (tem); |
4e8f195d TT |
804 | |
805 | /* The first dynamic check specified in 5.2.7. */ | |
806 | if (is_public_ancestor (arg_type, TYPE_TARGET_TYPE (resolved_type))) | |
807 | { | |
808 | if (class_types_same_p (rtti_type, TYPE_TARGET_TYPE (resolved_type))) | |
809 | return tem; | |
810 | result = NULL; | |
811 | if (dynamic_cast_check_1 (TYPE_TARGET_TYPE (resolved_type), | |
8af8e3bc PA |
812 | value_contents_for_printing (tem), |
813 | value_embedded_offset (tem), | |
814 | value_address (tem), tem, | |
4e8f195d TT |
815 | rtti_type, addr, |
816 | arg_type, | |
817 | &result) == 1) | |
818 | return value_cast (type, | |
a65cfae5 AV |
819 | is_ref |
820 | ? value_ref (result, TYPE_CODE (resolved_type)) | |
821 | : value_addr (result)); | |
4e8f195d TT |
822 | } |
823 | ||
824 | /* The second dynamic check specified in 5.2.7. */ | |
825 | result = NULL; | |
826 | if (is_public_ancestor (arg_type, rtti_type) | |
827 | && dynamic_cast_check_2 (TYPE_TARGET_TYPE (resolved_type), | |
8af8e3bc PA |
828 | value_contents_for_printing (tem), |
829 | value_embedded_offset (tem), | |
830 | value_address (tem), tem, | |
4e8f195d TT |
831 | rtti_type, &result) == 1) |
832 | return value_cast (type, | |
a65cfae5 AV |
833 | is_ref |
834 | ? value_ref (result, TYPE_CODE (resolved_type)) | |
835 | : value_addr (result)); | |
4e8f195d TT |
836 | |
837 | if (TYPE_CODE (resolved_type) == TYPE_CODE_PTR) | |
838 | return value_zero (type, not_lval); | |
839 | ||
840 | error (_("dynamic_cast failed")); | |
841 | } | |
842 | ||
c906108c SS |
843 | /* Create a value of type TYPE that is zero, and return it. */ |
844 | ||
f23631e4 | 845 | struct value * |
fba45db2 | 846 | value_zero (struct type *type, enum lval_type lv) |
c906108c | 847 | { |
f23631e4 | 848 | struct value *val = allocate_value (type); |
c906108c | 849 | |
bb7da2bf | 850 | VALUE_LVAL (val) = (lv == lval_computed ? not_lval : lv); |
c906108c SS |
851 | return val; |
852 | } | |
853 | ||
18a46dbe | 854 | /* Create a not_lval value of numeric type TYPE that is one, and return it. */ |
301f0ecf DE |
855 | |
856 | struct value * | |
18a46dbe | 857 | value_one (struct type *type) |
301f0ecf DE |
858 | { |
859 | struct type *type1 = check_typedef (type); | |
4e608b4f | 860 | struct value *val; |
301f0ecf DE |
861 | |
862 | if (TYPE_CODE (type1) == TYPE_CODE_DECFLOAT) | |
863 | { | |
e17a4113 | 864 | enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (type)); |
301f0ecf | 865 | gdb_byte v[16]; |
a109c7c1 | 866 | |
e17a4113 | 867 | decimal_from_string (v, TYPE_LENGTH (type), byte_order, "1"); |
301f0ecf DE |
868 | val = value_from_decfloat (type, v); |
869 | } | |
870 | else if (TYPE_CODE (type1) == TYPE_CODE_FLT) | |
871 | { | |
872 | val = value_from_double (type, (DOUBLEST) 1); | |
873 | } | |
874 | else if (is_integral_type (type1)) | |
875 | { | |
876 | val = value_from_longest (type, (LONGEST) 1); | |
877 | } | |
120bd360 KW |
878 | else if (TYPE_CODE (type1) == TYPE_CODE_ARRAY && TYPE_VECTOR (type1)) |
879 | { | |
880 | struct type *eltype = check_typedef (TYPE_TARGET_TYPE (type1)); | |
cfa6f054 KW |
881 | int i; |
882 | LONGEST low_bound, high_bound; | |
120bd360 KW |
883 | struct value *tmp; |
884 | ||
cfa6f054 KW |
885 | if (!get_array_bounds (type1, &low_bound, &high_bound)) |
886 | error (_("Could not determine the vector bounds")); | |
887 | ||
120bd360 | 888 | val = allocate_value (type); |
cfa6f054 | 889 | for (i = 0; i < high_bound - low_bound + 1; i++) |
120bd360 | 890 | { |
18a46dbe | 891 | tmp = value_one (eltype); |
120bd360 KW |
892 | memcpy (value_contents_writeable (val) + i * TYPE_LENGTH (eltype), |
893 | value_contents_all (tmp), TYPE_LENGTH (eltype)); | |
894 | } | |
895 | } | |
301f0ecf DE |
896 | else |
897 | { | |
898 | error (_("Not a numeric type.")); | |
899 | } | |
900 | ||
18a46dbe JK |
901 | /* value_one result is never used for assignments to. */ |
902 | gdb_assert (VALUE_LVAL (val) == not_lval); | |
903 | ||
301f0ecf DE |
904 | return val; |
905 | } | |
906 | ||
80180f79 SA |
907 | /* Helper function for value_at, value_at_lazy, and value_at_lazy_stack. |
908 | The type of the created value may differ from the passed type TYPE. | |
909 | Make sure to retrieve the returned values's new type after this call | |
910 | e.g. in case the type is a variable length array. */ | |
4e5d721f DE |
911 | |
912 | static struct value * | |
913 | get_value_at (struct type *type, CORE_ADDR addr, int lazy) | |
914 | { | |
915 | struct value *val; | |
916 | ||
917 | if (TYPE_CODE (check_typedef (type)) == TYPE_CODE_VOID) | |
918 | error (_("Attempt to dereference a generic pointer.")); | |
919 | ||
a3d34bf4 | 920 | val = value_from_contents_and_address (type, NULL, addr); |
4e5d721f | 921 | |
a3d34bf4 PA |
922 | if (!lazy) |
923 | value_fetch_lazy (val); | |
4e5d721f DE |
924 | |
925 | return val; | |
926 | } | |
927 | ||
070ad9f0 | 928 | /* Return a value with type TYPE located at ADDR. |
c906108c SS |
929 | |
930 | Call value_at only if the data needs to be fetched immediately; | |
931 | if we can be 'lazy' and defer the fetch, perhaps indefinately, call | |
932 | value_at_lazy instead. value_at_lazy simply records the address of | |
070ad9f0 | 933 | the data and sets the lazy-evaluation-required flag. The lazy flag |
0fd88904 | 934 | is tested in the value_contents macro, which is used if and when |
80180f79 SA |
935 | the contents are actually required. The type of the created value |
936 | may differ from the passed type TYPE. Make sure to retrieve the | |
937 | returned values's new type after this call e.g. in case the type | |
938 | is a variable length array. | |
c906108c SS |
939 | |
940 | Note: value_at does *NOT* handle embedded offsets; perform such | |
ac3eeb49 | 941 | adjustments before or after calling it. */ |
c906108c | 942 | |
f23631e4 | 943 | struct value * |
00a4c844 | 944 | value_at (struct type *type, CORE_ADDR addr) |
c906108c | 945 | { |
4e5d721f | 946 | return get_value_at (type, addr, 0); |
c906108c SS |
947 | } |
948 | ||
80180f79 SA |
949 | /* Return a lazy value with type TYPE located at ADDR (cf. value_at). |
950 | The type of the created value may differ from the passed type TYPE. | |
951 | Make sure to retrieve the returned values's new type after this call | |
952 | e.g. in case the type is a variable length array. */ | |
c906108c | 953 | |
f23631e4 | 954 | struct value * |
00a4c844 | 955 | value_at_lazy (struct type *type, CORE_ADDR addr) |
c906108c | 956 | { |
4e5d721f | 957 | return get_value_at (type, addr, 1); |
c906108c SS |
958 | } |
959 | ||
e6ca34fc | 960 | void |
6b850546 | 961 | read_value_memory (struct value *val, LONGEST embedded_offset, |
e6ca34fc PA |
962 | int stack, CORE_ADDR memaddr, |
963 | gdb_byte *buffer, size_t length) | |
964 | { | |
3ae385af SM |
965 | ULONGEST xfered_total = 0; |
966 | struct gdbarch *arch = get_value_arch (val); | |
967 | int unit_size = gdbarch_addressable_memory_unit_size (arch); | |
6d7e9d3b YQ |
968 | enum target_object object; |
969 | ||
970 | object = stack ? TARGET_OBJECT_STACK_MEMORY : TARGET_OBJECT_MEMORY; | |
5a2eb0ef | 971 | |
3ae385af | 972 | while (xfered_total < length) |
5a2eb0ef YQ |
973 | { |
974 | enum target_xfer_status status; | |
3ae385af | 975 | ULONGEST xfered_partial; |
5a2eb0ef YQ |
976 | |
977 | status = target_xfer_partial (current_target.beneath, | |
6d7e9d3b | 978 | object, NULL, |
3ae385af SM |
979 | buffer + xfered_total * unit_size, NULL, |
980 | memaddr + xfered_total, | |
981 | length - xfered_total, | |
982 | &xfered_partial); | |
5a2eb0ef YQ |
983 | |
984 | if (status == TARGET_XFER_OK) | |
985 | /* nothing */; | |
bc113b4e | 986 | else if (status == TARGET_XFER_UNAVAILABLE) |
3ae385af SM |
987 | mark_value_bytes_unavailable (val, embedded_offset + xfered_total, |
988 | xfered_partial); | |
5a2eb0ef | 989 | else if (status == TARGET_XFER_EOF) |
3ae385af | 990 | memory_error (TARGET_XFER_E_IO, memaddr + xfered_total); |
e6ca34fc | 991 | else |
3ae385af | 992 | memory_error (status, memaddr + xfered_total); |
e6ca34fc | 993 | |
3ae385af | 994 | xfered_total += xfered_partial; |
5a2eb0ef | 995 | QUIT; |
e6ca34fc PA |
996 | } |
997 | } | |
c906108c SS |
998 | |
999 | /* Store the contents of FROMVAL into the location of TOVAL. | |
1000 | Return a new value with the location of TOVAL and contents of FROMVAL. */ | |
1001 | ||
f23631e4 AC |
1002 | struct value * |
1003 | value_assign (struct value *toval, struct value *fromval) | |
c906108c | 1004 | { |
52f0bd74 | 1005 | struct type *type; |
f23631e4 | 1006 | struct value *val; |
cb741690 | 1007 | struct frame_id old_frame; |
c906108c | 1008 | |
88e3b34b | 1009 | if (!deprecated_value_modifiable (toval)) |
8a3fe4f8 | 1010 | error (_("Left operand of assignment is not a modifiable lvalue.")); |
c906108c | 1011 | |
994b9211 | 1012 | toval = coerce_ref (toval); |
c906108c | 1013 | |
df407dfe | 1014 | type = value_type (toval); |
c906108c | 1015 | if (VALUE_LVAL (toval) != lval_internalvar) |
3cbaedff | 1016 | fromval = value_cast (type, fromval); |
c906108c | 1017 | else |
63092375 DJ |
1018 | { |
1019 | /* Coerce arrays and functions to pointers, except for arrays | |
1020 | which only live in GDB's storage. */ | |
1021 | if (!value_must_coerce_to_target (fromval)) | |
1022 | fromval = coerce_array (fromval); | |
1023 | } | |
1024 | ||
f168693b | 1025 | type = check_typedef (type); |
c906108c | 1026 | |
ac3eeb49 MS |
1027 | /* Since modifying a register can trash the frame chain, and |
1028 | modifying memory can trash the frame cache, we save the old frame | |
1029 | and then restore the new frame afterwards. */ | |
206415a3 | 1030 | old_frame = get_frame_id (deprecated_safe_get_selected_frame ()); |
cb741690 | 1031 | |
c906108c SS |
1032 | switch (VALUE_LVAL (toval)) |
1033 | { | |
1034 | case lval_internalvar: | |
1035 | set_internalvar (VALUE_INTERNALVAR (toval), fromval); | |
4aac0db7 UW |
1036 | return value_of_internalvar (get_type_arch (type), |
1037 | VALUE_INTERNALVAR (toval)); | |
c906108c SS |
1038 | |
1039 | case lval_internalvar_component: | |
d9e98382 | 1040 | { |
6b850546 | 1041 | LONGEST offset = value_offset (toval); |
d9e98382 SDJ |
1042 | |
1043 | /* Are we dealing with a bitfield? | |
1044 | ||
1045 | It is important to mention that `value_parent (toval)' is | |
1046 | non-NULL iff `value_bitsize (toval)' is non-zero. */ | |
1047 | if (value_bitsize (toval)) | |
1048 | { | |
1049 | /* VALUE_INTERNALVAR below refers to the parent value, while | |
1050 | the offset is relative to this parent value. */ | |
1051 | gdb_assert (value_parent (value_parent (toval)) == NULL); | |
1052 | offset += value_offset (value_parent (toval)); | |
1053 | } | |
1054 | ||
1055 | set_internalvar_component (VALUE_INTERNALVAR (toval), | |
1056 | offset, | |
1057 | value_bitpos (toval), | |
1058 | value_bitsize (toval), | |
1059 | fromval); | |
1060 | } | |
c906108c SS |
1061 | break; |
1062 | ||
1063 | case lval_memory: | |
1064 | { | |
fc1a4b47 | 1065 | const gdb_byte *dest_buffer; |
c5aa993b JM |
1066 | CORE_ADDR changed_addr; |
1067 | int changed_len; | |
10c42a71 | 1068 | gdb_byte buffer[sizeof (LONGEST)]; |
c906108c | 1069 | |
df407dfe | 1070 | if (value_bitsize (toval)) |
c5aa993b | 1071 | { |
2d88202a | 1072 | struct value *parent = value_parent (toval); |
2d88202a | 1073 | |
a109c7c1 | 1074 | changed_addr = value_address (parent) + value_offset (toval); |
df407dfe AC |
1075 | changed_len = (value_bitpos (toval) |
1076 | + value_bitsize (toval) | |
c5aa993b JM |
1077 | + HOST_CHAR_BIT - 1) |
1078 | / HOST_CHAR_BIT; | |
c906108c | 1079 | |
4ea48cc1 DJ |
1080 | /* If we can read-modify-write exactly the size of the |
1081 | containing type (e.g. short or int) then do so. This | |
1082 | is safer for volatile bitfields mapped to hardware | |
1083 | registers. */ | |
1084 | if (changed_len < TYPE_LENGTH (type) | |
1085 | && TYPE_LENGTH (type) <= (int) sizeof (LONGEST) | |
2d88202a | 1086 | && ((LONGEST) changed_addr % TYPE_LENGTH (type)) == 0) |
4ea48cc1 DJ |
1087 | changed_len = TYPE_LENGTH (type); |
1088 | ||
c906108c | 1089 | if (changed_len > (int) sizeof (LONGEST)) |
3e43a32a MS |
1090 | error (_("Can't handle bitfields which " |
1091 | "don't fit in a %d bit word."), | |
baa6f10b | 1092 | (int) sizeof (LONGEST) * HOST_CHAR_BIT); |
c906108c | 1093 | |
2d88202a | 1094 | read_memory (changed_addr, buffer, changed_len); |
50810684 | 1095 | modify_field (type, buffer, value_as_long (fromval), |
df407dfe | 1096 | value_bitpos (toval), value_bitsize (toval)); |
c906108c SS |
1097 | dest_buffer = buffer; |
1098 | } | |
c906108c SS |
1099 | else |
1100 | { | |
42ae5230 | 1101 | changed_addr = value_address (toval); |
3ae385af | 1102 | changed_len = type_length_units (type); |
0fd88904 | 1103 | dest_buffer = value_contents (fromval); |
c906108c SS |
1104 | } |
1105 | ||
972daa01 | 1106 | write_memory_with_notification (changed_addr, dest_buffer, changed_len); |
c906108c SS |
1107 | } |
1108 | break; | |
1109 | ||
492254e9 | 1110 | case lval_register: |
c906108c | 1111 | { |
c906108c | 1112 | struct frame_info *frame; |
d80b854b | 1113 | struct gdbarch *gdbarch; |
ff2e87ac | 1114 | int value_reg; |
c906108c | 1115 | |
41b56feb KB |
1116 | /* Figure out which frame this is in currently. |
1117 | ||
1118 | We use VALUE_FRAME_ID for obtaining the value's frame id instead of | |
1119 | VALUE_NEXT_FRAME_ID due to requiring a frame which may be passed to | |
1120 | put_frame_register_bytes() below. That function will (eventually) | |
1121 | perform the necessary unwind operation by first obtaining the next | |
1122 | frame. */ | |
0c16dd26 | 1123 | frame = frame_find_by_id (VALUE_FRAME_ID (toval)); |
41b56feb | 1124 | |
0c16dd26 | 1125 | value_reg = VALUE_REGNUM (toval); |
c906108c SS |
1126 | |
1127 | if (!frame) | |
8a3fe4f8 | 1128 | error (_("Value being assigned to is no longer active.")); |
d80b854b UW |
1129 | |
1130 | gdbarch = get_frame_arch (frame); | |
3e871532 LM |
1131 | |
1132 | if (value_bitsize (toval)) | |
492254e9 | 1133 | { |
3e871532 | 1134 | struct value *parent = value_parent (toval); |
6b850546 | 1135 | LONGEST offset = value_offset (parent) + value_offset (toval); |
3e871532 LM |
1136 | int changed_len; |
1137 | gdb_byte buffer[sizeof (LONGEST)]; | |
1138 | int optim, unavail; | |
1139 | ||
1140 | changed_len = (value_bitpos (toval) | |
1141 | + value_bitsize (toval) | |
1142 | + HOST_CHAR_BIT - 1) | |
1143 | / HOST_CHAR_BIT; | |
1144 | ||
1145 | if (changed_len > (int) sizeof (LONGEST)) | |
1146 | error (_("Can't handle bitfields which " | |
1147 | "don't fit in a %d bit word."), | |
1148 | (int) sizeof (LONGEST) * HOST_CHAR_BIT); | |
1149 | ||
1150 | if (!get_frame_register_bytes (frame, value_reg, offset, | |
1151 | changed_len, buffer, | |
1152 | &optim, &unavail)) | |
1153 | { | |
1154 | if (optim) | |
1155 | throw_error (OPTIMIZED_OUT_ERROR, | |
1156 | _("value has been optimized out")); | |
1157 | if (unavail) | |
1158 | throw_error (NOT_AVAILABLE_ERROR, | |
1159 | _("value is not available")); | |
1160 | } | |
1161 | ||
1162 | modify_field (type, buffer, value_as_long (fromval), | |
1163 | value_bitpos (toval), value_bitsize (toval)); | |
1164 | ||
1165 | put_frame_register_bytes (frame, value_reg, offset, | |
1166 | changed_len, buffer); | |
492254e9 | 1167 | } |
c906108c | 1168 | else |
492254e9 | 1169 | { |
3e871532 LM |
1170 | if (gdbarch_convert_register_p (gdbarch, VALUE_REGNUM (toval), |
1171 | type)) | |
00fa51f6 | 1172 | { |
3e871532 LM |
1173 | /* If TOVAL is a special machine register requiring |
1174 | conversion of program values to a special raw | |
1175 | format. */ | |
1176 | gdbarch_value_to_register (gdbarch, frame, | |
1177 | VALUE_REGNUM (toval), type, | |
1178 | value_contents (fromval)); | |
00fa51f6 | 1179 | } |
c906108c | 1180 | else |
00fa51f6 UW |
1181 | { |
1182 | put_frame_register_bytes (frame, value_reg, | |
1183 | value_offset (toval), | |
1184 | TYPE_LENGTH (type), | |
1185 | value_contents (fromval)); | |
1186 | } | |
ff2e87ac | 1187 | } |
00fa51f6 | 1188 | |
162078c8 | 1189 | observer_notify_register_changed (frame, value_reg); |
ff2e87ac | 1190 | break; |
c906108c | 1191 | } |
5f5233d4 PA |
1192 | |
1193 | case lval_computed: | |
1194 | { | |
c8f2448a | 1195 | const struct lval_funcs *funcs = value_computed_funcs (toval); |
5f5233d4 | 1196 | |
ac71a68c JK |
1197 | if (funcs->write != NULL) |
1198 | { | |
1199 | funcs->write (toval, fromval); | |
1200 | break; | |
1201 | } | |
5f5233d4 | 1202 | } |
ac71a68c | 1203 | /* Fall through. */ |
5f5233d4 | 1204 | |
c906108c | 1205 | default: |
8a3fe4f8 | 1206 | error (_("Left operand of assignment is not an lvalue.")); |
c906108c SS |
1207 | } |
1208 | ||
cb741690 DJ |
1209 | /* Assigning to the stack pointer, frame pointer, and other |
1210 | (architecture and calling convention specific) registers may | |
d649a38e | 1211 | cause the frame cache and regcache to be out of date. Assigning to memory |
cb741690 DJ |
1212 | also can. We just do this on all assignments to registers or |
1213 | memory, for simplicity's sake; I doubt the slowdown matters. */ | |
1214 | switch (VALUE_LVAL (toval)) | |
1215 | { | |
1216 | case lval_memory: | |
1217 | case lval_register: | |
0e03807e | 1218 | case lval_computed: |
cb741690 | 1219 | |
d649a38e | 1220 | observer_notify_target_changed (¤t_target); |
cb741690 | 1221 | |
ac3eeb49 MS |
1222 | /* Having destroyed the frame cache, restore the selected |
1223 | frame. */ | |
cb741690 DJ |
1224 | |
1225 | /* FIXME: cagney/2002-11-02: There has to be a better way of | |
1226 | doing this. Instead of constantly saving/restoring the | |
1227 | frame. Why not create a get_selected_frame() function that, | |
1228 | having saved the selected frame's ID can automatically | |
1229 | re-find the previously selected frame automatically. */ | |
1230 | ||
1231 | { | |
1232 | struct frame_info *fi = frame_find_by_id (old_frame); | |
a109c7c1 | 1233 | |
cb741690 DJ |
1234 | if (fi != NULL) |
1235 | select_frame (fi); | |
1236 | } | |
1237 | ||
1238 | break; | |
1239 | default: | |
1240 | break; | |
1241 | } | |
1242 | ||
ac3eeb49 MS |
1243 | /* If the field does not entirely fill a LONGEST, then zero the sign |
1244 | bits. If the field is signed, and is negative, then sign | |
1245 | extend. */ | |
df407dfe AC |
1246 | if ((value_bitsize (toval) > 0) |
1247 | && (value_bitsize (toval) < 8 * (int) sizeof (LONGEST))) | |
c906108c SS |
1248 | { |
1249 | LONGEST fieldval = value_as_long (fromval); | |
df407dfe | 1250 | LONGEST valmask = (((ULONGEST) 1) << value_bitsize (toval)) - 1; |
c906108c SS |
1251 | |
1252 | fieldval &= valmask; | |
ac3eeb49 MS |
1253 | if (!TYPE_UNSIGNED (type) |
1254 | && (fieldval & (valmask ^ (valmask >> 1)))) | |
c906108c SS |
1255 | fieldval |= ~valmask; |
1256 | ||
1257 | fromval = value_from_longest (type, fieldval); | |
1258 | } | |
1259 | ||
4aac0db7 UW |
1260 | /* The return value is a copy of TOVAL so it shares its location |
1261 | information, but its contents are updated from FROMVAL. This | |
1262 | implies the returned value is not lazy, even if TOVAL was. */ | |
c906108c | 1263 | val = value_copy (toval); |
4aac0db7 | 1264 | set_value_lazy (val, 0); |
0fd88904 | 1265 | memcpy (value_contents_raw (val), value_contents (fromval), |
c906108c | 1266 | TYPE_LENGTH (type)); |
4aac0db7 UW |
1267 | |
1268 | /* We copy over the enclosing type and pointed-to offset from FROMVAL | |
1269 | in the case of pointer types. For object types, the enclosing type | |
1270 | and embedded offset must *not* be copied: the target object refered | |
1271 | to by TOVAL retains its original dynamic type after assignment. */ | |
1272 | if (TYPE_CODE (type) == TYPE_CODE_PTR) | |
1273 | { | |
1274 | set_value_enclosing_type (val, value_enclosing_type (fromval)); | |
1275 | set_value_pointed_to_offset (val, value_pointed_to_offset (fromval)); | |
1276 | } | |
c5aa993b | 1277 | |
c906108c SS |
1278 | return val; |
1279 | } | |
1280 | ||
1281 | /* Extend a value VAL to COUNT repetitions of its type. */ | |
1282 | ||
f23631e4 AC |
1283 | struct value * |
1284 | value_repeat (struct value *arg1, int count) | |
c906108c | 1285 | { |
f23631e4 | 1286 | struct value *val; |
c906108c SS |
1287 | |
1288 | if (VALUE_LVAL (arg1) != lval_memory) | |
8a3fe4f8 | 1289 | error (_("Only values in memory can be extended with '@'.")); |
c906108c | 1290 | if (count < 1) |
8a3fe4f8 | 1291 | error (_("Invalid number %d of repetitions."), count); |
c906108c | 1292 | |
4754a64e | 1293 | val = allocate_repeat_value (value_enclosing_type (arg1), count); |
c906108c | 1294 | |
c906108c | 1295 | VALUE_LVAL (val) = lval_memory; |
42ae5230 | 1296 | set_value_address (val, value_address (arg1)); |
c906108c | 1297 | |
24e6bcee PA |
1298 | read_value_memory (val, 0, value_stack (val), value_address (val), |
1299 | value_contents_all_raw (val), | |
3ae385af | 1300 | type_length_units (value_enclosing_type (val))); |
24e6bcee | 1301 | |
c906108c SS |
1302 | return val; |
1303 | } | |
1304 | ||
f23631e4 | 1305 | struct value * |
9df2fbc4 | 1306 | value_of_variable (struct symbol *var, const struct block *b) |
c906108c | 1307 | { |
63e43d3a | 1308 | struct frame_info *frame = NULL; |
c906108c | 1309 | |
63e43d3a | 1310 | if (symbol_read_needs_frame (var)) |
61212c0f | 1311 | frame = get_selected_frame (_("No frame selected.")); |
c906108c | 1312 | |
63e43d3a | 1313 | return read_var_value (var, b, frame); |
c906108c SS |
1314 | } |
1315 | ||
61212c0f | 1316 | struct value * |
270140bd | 1317 | address_of_variable (struct symbol *var, const struct block *b) |
61212c0f UW |
1318 | { |
1319 | struct type *type = SYMBOL_TYPE (var); | |
1320 | struct value *val; | |
1321 | ||
1322 | /* Evaluate it first; if the result is a memory address, we're fine. | |
581e13c1 | 1323 | Lazy evaluation pays off here. */ |
61212c0f UW |
1324 | |
1325 | val = value_of_variable (var, b); | |
9f1f738a | 1326 | type = value_type (val); |
61212c0f UW |
1327 | |
1328 | if ((VALUE_LVAL (val) == lval_memory && value_lazy (val)) | |
1329 | || TYPE_CODE (type) == TYPE_CODE_FUNC) | |
1330 | { | |
42ae5230 | 1331 | CORE_ADDR addr = value_address (val); |
a109c7c1 | 1332 | |
61212c0f UW |
1333 | return value_from_pointer (lookup_pointer_type (type), addr); |
1334 | } | |
1335 | ||
1336 | /* Not a memory address; check what the problem was. */ | |
1337 | switch (VALUE_LVAL (val)) | |
1338 | { | |
1339 | case lval_register: | |
1340 | { | |
1341 | struct frame_info *frame; | |
1342 | const char *regname; | |
1343 | ||
41b56feb | 1344 | frame = frame_find_by_id (VALUE_NEXT_FRAME_ID (val)); |
61212c0f UW |
1345 | gdb_assert (frame); |
1346 | ||
1347 | regname = gdbarch_register_name (get_frame_arch (frame), | |
1348 | VALUE_REGNUM (val)); | |
1349 | gdb_assert (regname && *regname); | |
1350 | ||
1351 | error (_("Address requested for identifier " | |
1352 | "\"%s\" which is in register $%s"), | |
1353 | SYMBOL_PRINT_NAME (var), regname); | |
1354 | break; | |
1355 | } | |
1356 | ||
1357 | default: | |
1358 | error (_("Can't take address of \"%s\" which isn't an lvalue."), | |
1359 | SYMBOL_PRINT_NAME (var)); | |
1360 | break; | |
1361 | } | |
1362 | ||
1363 | return val; | |
1364 | } | |
1365 | ||
63092375 DJ |
1366 | /* Return one if VAL does not live in target memory, but should in order |
1367 | to operate on it. Otherwise return zero. */ | |
1368 | ||
1369 | int | |
1370 | value_must_coerce_to_target (struct value *val) | |
1371 | { | |
1372 | struct type *valtype; | |
1373 | ||
1374 | /* The only lval kinds which do not live in target memory. */ | |
1375 | if (VALUE_LVAL (val) != not_lval | |
e81e7f5e SC |
1376 | && VALUE_LVAL (val) != lval_internalvar |
1377 | && VALUE_LVAL (val) != lval_xcallable) | |
63092375 DJ |
1378 | return 0; |
1379 | ||
1380 | valtype = check_typedef (value_type (val)); | |
1381 | ||
1382 | switch (TYPE_CODE (valtype)) | |
1383 | { | |
1384 | case TYPE_CODE_ARRAY: | |
3cbaedff | 1385 | return TYPE_VECTOR (valtype) ? 0 : 1; |
63092375 DJ |
1386 | case TYPE_CODE_STRING: |
1387 | return 1; | |
1388 | default: | |
1389 | return 0; | |
1390 | } | |
1391 | } | |
1392 | ||
3e43a32a MS |
1393 | /* Make sure that VAL lives in target memory if it's supposed to. For |
1394 | instance, strings are constructed as character arrays in GDB's | |
1395 | storage, and this function copies them to the target. */ | |
63092375 DJ |
1396 | |
1397 | struct value * | |
1398 | value_coerce_to_target (struct value *val) | |
1399 | { | |
1400 | LONGEST length; | |
1401 | CORE_ADDR addr; | |
1402 | ||
1403 | if (!value_must_coerce_to_target (val)) | |
1404 | return val; | |
1405 | ||
1406 | length = TYPE_LENGTH (check_typedef (value_type (val))); | |
1407 | addr = allocate_space_in_inferior (length); | |
1408 | write_memory (addr, value_contents (val), length); | |
1409 | return value_at_lazy (value_type (val), addr); | |
1410 | } | |
1411 | ||
ac3eeb49 MS |
1412 | /* Given a value which is an array, return a value which is a pointer |
1413 | to its first element, regardless of whether or not the array has a | |
1414 | nonzero lower bound. | |
c906108c | 1415 | |
ac3eeb49 MS |
1416 | FIXME: A previous comment here indicated that this routine should |
1417 | be substracting the array's lower bound. It's not clear to me that | |
1418 | this is correct. Given an array subscripting operation, it would | |
1419 | certainly work to do the adjustment here, essentially computing: | |
c906108c SS |
1420 | |
1421 | (&array[0] - (lowerbound * sizeof array[0])) + (index * sizeof array[0]) | |
1422 | ||
ac3eeb49 MS |
1423 | However I believe a more appropriate and logical place to account |
1424 | for the lower bound is to do so in value_subscript, essentially | |
1425 | computing: | |
c906108c SS |
1426 | |
1427 | (&array[0] + ((index - lowerbound) * sizeof array[0])) | |
1428 | ||
ac3eeb49 MS |
1429 | As further evidence consider what would happen with operations |
1430 | other than array subscripting, where the caller would get back a | |
1431 | value that had an address somewhere before the actual first element | |
1432 | of the array, and the information about the lower bound would be | |
581e13c1 | 1433 | lost because of the coercion to pointer type. */ |
c906108c | 1434 | |
f23631e4 AC |
1435 | struct value * |
1436 | value_coerce_array (struct value *arg1) | |
c906108c | 1437 | { |
df407dfe | 1438 | struct type *type = check_typedef (value_type (arg1)); |
c906108c | 1439 | |
63092375 DJ |
1440 | /* If the user tries to do something requiring a pointer with an |
1441 | array that has not yet been pushed to the target, then this would | |
1442 | be a good time to do so. */ | |
1443 | arg1 = value_coerce_to_target (arg1); | |
1444 | ||
c906108c | 1445 | if (VALUE_LVAL (arg1) != lval_memory) |
8a3fe4f8 | 1446 | error (_("Attempt to take address of value not located in memory.")); |
c906108c | 1447 | |
4478b372 | 1448 | return value_from_pointer (lookup_pointer_type (TYPE_TARGET_TYPE (type)), |
42ae5230 | 1449 | value_address (arg1)); |
c906108c SS |
1450 | } |
1451 | ||
1452 | /* Given a value which is a function, return a value which is a pointer | |
1453 | to it. */ | |
1454 | ||
f23631e4 AC |
1455 | struct value * |
1456 | value_coerce_function (struct value *arg1) | |
c906108c | 1457 | { |
f23631e4 | 1458 | struct value *retval; |
c906108c SS |
1459 | |
1460 | if (VALUE_LVAL (arg1) != lval_memory) | |
8a3fe4f8 | 1461 | error (_("Attempt to take address of value not located in memory.")); |
c906108c | 1462 | |
df407dfe | 1463 | retval = value_from_pointer (lookup_pointer_type (value_type (arg1)), |
42ae5230 | 1464 | value_address (arg1)); |
c906108c | 1465 | return retval; |
c5aa993b | 1466 | } |
c906108c | 1467 | |
ac3eeb49 MS |
1468 | /* Return a pointer value for the object for which ARG1 is the |
1469 | contents. */ | |
c906108c | 1470 | |
f23631e4 AC |
1471 | struct value * |
1472 | value_addr (struct value *arg1) | |
c906108c | 1473 | { |
f23631e4 | 1474 | struct value *arg2; |
df407dfe | 1475 | struct type *type = check_typedef (value_type (arg1)); |
a109c7c1 | 1476 | |
aa006118 | 1477 | if (TYPE_IS_REFERENCE (type)) |
c906108c | 1478 | { |
3326303b MG |
1479 | if (value_bits_synthetic_pointer (arg1, value_embedded_offset (arg1), |
1480 | TARGET_CHAR_BIT * TYPE_LENGTH (type))) | |
1481 | arg1 = coerce_ref (arg1); | |
1482 | else | |
1483 | { | |
1484 | /* Copy the value, but change the type from (T&) to (T*). We | |
1485 | keep the same location information, which is efficient, and | |
1486 | allows &(&X) to get the location containing the reference. | |
1487 | Do the same to its enclosing type for consistency. */ | |
1488 | struct type *type_ptr | |
1489 | = lookup_pointer_type (TYPE_TARGET_TYPE (type)); | |
1490 | struct type *enclosing_type | |
1491 | = check_typedef (value_enclosing_type (arg1)); | |
1492 | struct type *enclosing_type_ptr | |
1493 | = lookup_pointer_type (TYPE_TARGET_TYPE (enclosing_type)); | |
1494 | ||
1495 | arg2 = value_copy (arg1); | |
1496 | deprecated_set_value_type (arg2, type_ptr); | |
1497 | set_value_enclosing_type (arg2, enclosing_type_ptr); | |
a22df60a | 1498 | |
3326303b MG |
1499 | return arg2; |
1500 | } | |
c906108c SS |
1501 | } |
1502 | if (TYPE_CODE (type) == TYPE_CODE_FUNC) | |
1503 | return value_coerce_function (arg1); | |
1504 | ||
63092375 DJ |
1505 | /* If this is an array that has not yet been pushed to the target, |
1506 | then this would be a good time to force it to memory. */ | |
1507 | arg1 = value_coerce_to_target (arg1); | |
1508 | ||
c906108c | 1509 | if (VALUE_LVAL (arg1) != lval_memory) |
8a3fe4f8 | 1510 | error (_("Attempt to take address of value not located in memory.")); |
c906108c | 1511 | |
581e13c1 | 1512 | /* Get target memory address. */ |
df407dfe | 1513 | arg2 = value_from_pointer (lookup_pointer_type (value_type (arg1)), |
42ae5230 | 1514 | (value_address (arg1) |
13c3b5f5 | 1515 | + value_embedded_offset (arg1))); |
c906108c SS |
1516 | |
1517 | /* This may be a pointer to a base subobject; so remember the | |
ac3eeb49 | 1518 | full derived object's type ... */ |
4dfea560 DE |
1519 | set_value_enclosing_type (arg2, |
1520 | lookup_pointer_type (value_enclosing_type (arg1))); | |
ac3eeb49 MS |
1521 | /* ... and also the relative position of the subobject in the full |
1522 | object. */ | |
b44d461b | 1523 | set_value_pointed_to_offset (arg2, value_embedded_offset (arg1)); |
c906108c SS |
1524 | return arg2; |
1525 | } | |
1526 | ||
ac3eeb49 MS |
1527 | /* Return a reference value for the object for which ARG1 is the |
1528 | contents. */ | |
fb933624 DJ |
1529 | |
1530 | struct value * | |
a65cfae5 | 1531 | value_ref (struct value *arg1, enum type_code refcode) |
fb933624 DJ |
1532 | { |
1533 | struct value *arg2; | |
fb933624 | 1534 | struct type *type = check_typedef (value_type (arg1)); |
a109c7c1 | 1535 | |
a65cfae5 AV |
1536 | gdb_assert (refcode == TYPE_CODE_REF || refcode == TYPE_CODE_RVALUE_REF); |
1537 | ||
1538 | if ((TYPE_CODE (type) == TYPE_CODE_REF | |
1539 | || TYPE_CODE (type) == TYPE_CODE_RVALUE_REF) | |
1540 | && TYPE_CODE (type) == refcode) | |
fb933624 DJ |
1541 | return arg1; |
1542 | ||
1543 | arg2 = value_addr (arg1); | |
a65cfae5 | 1544 | deprecated_set_value_type (arg2, lookup_reference_type (type, refcode)); |
fb933624 DJ |
1545 | return arg2; |
1546 | } | |
1547 | ||
ac3eeb49 MS |
1548 | /* Given a value of a pointer type, apply the C unary * operator to |
1549 | it. */ | |
c906108c | 1550 | |
f23631e4 AC |
1551 | struct value * |
1552 | value_ind (struct value *arg1) | |
c906108c SS |
1553 | { |
1554 | struct type *base_type; | |
f23631e4 | 1555 | struct value *arg2; |
c906108c | 1556 | |
994b9211 | 1557 | arg1 = coerce_array (arg1); |
c906108c | 1558 | |
df407dfe | 1559 | base_type = check_typedef (value_type (arg1)); |
c906108c | 1560 | |
8cf6f0b1 TT |
1561 | if (VALUE_LVAL (arg1) == lval_computed) |
1562 | { | |
c8f2448a | 1563 | const struct lval_funcs *funcs = value_computed_funcs (arg1); |
8cf6f0b1 TT |
1564 | |
1565 | if (funcs->indirect) | |
1566 | { | |
1567 | struct value *result = funcs->indirect (arg1); | |
1568 | ||
1569 | if (result) | |
1570 | return result; | |
1571 | } | |
1572 | } | |
1573 | ||
22fe0fbb | 1574 | if (TYPE_CODE (base_type) == TYPE_CODE_PTR) |
c906108c SS |
1575 | { |
1576 | struct type *enc_type; | |
a109c7c1 | 1577 | |
ac3eeb49 MS |
1578 | /* We may be pointing to something embedded in a larger object. |
1579 | Get the real type of the enclosing object. */ | |
4754a64e | 1580 | enc_type = check_typedef (value_enclosing_type (arg1)); |
c906108c | 1581 | enc_type = TYPE_TARGET_TYPE (enc_type); |
0d5de010 DJ |
1582 | |
1583 | if (TYPE_CODE (check_typedef (enc_type)) == TYPE_CODE_FUNC | |
1584 | || TYPE_CODE (check_typedef (enc_type)) == TYPE_CODE_METHOD) | |
1585 | /* For functions, go through find_function_addr, which knows | |
1586 | how to handle function descriptors. */ | |
ac3eeb49 MS |
1587 | arg2 = value_at_lazy (enc_type, |
1588 | find_function_addr (arg1, NULL)); | |
0d5de010 | 1589 | else |
581e13c1 | 1590 | /* Retrieve the enclosing object pointed to. */ |
ac3eeb49 MS |
1591 | arg2 = value_at_lazy (enc_type, |
1592 | (value_as_address (arg1) | |
1593 | - value_pointed_to_offset (arg1))); | |
0d5de010 | 1594 | |
9f1f738a | 1595 | enc_type = value_type (arg2); |
dfcee124 | 1596 | return readjust_indirect_value_type (arg2, enc_type, base_type, arg1); |
c906108c SS |
1597 | } |
1598 | ||
8a3fe4f8 | 1599 | error (_("Attempt to take contents of a non-pointer value.")); |
ac3eeb49 | 1600 | return 0; /* For lint -- never reached. */ |
c906108c SS |
1601 | } |
1602 | \f | |
39d37385 PA |
1603 | /* Create a value for an array by allocating space in GDB, copying the |
1604 | data into that space, and then setting up an array value. | |
c906108c | 1605 | |
ac3eeb49 MS |
1606 | The array bounds are set from LOWBOUND and HIGHBOUND, and the array |
1607 | is populated from the values passed in ELEMVEC. | |
c906108c SS |
1608 | |
1609 | The element type of the array is inherited from the type of the | |
1610 | first element, and all elements must have the same size (though we | |
ac3eeb49 | 1611 | don't currently enforce any restriction on their types). */ |
c906108c | 1612 | |
f23631e4 AC |
1613 | struct value * |
1614 | value_array (int lowbound, int highbound, struct value **elemvec) | |
c906108c SS |
1615 | { |
1616 | int nelem; | |
1617 | int idx; | |
6b850546 | 1618 | ULONGEST typelength; |
f23631e4 | 1619 | struct value *val; |
c906108c | 1620 | struct type *arraytype; |
c906108c | 1621 | |
ac3eeb49 MS |
1622 | /* Validate that the bounds are reasonable and that each of the |
1623 | elements have the same size. */ | |
c906108c SS |
1624 | |
1625 | nelem = highbound - lowbound + 1; | |
1626 | if (nelem <= 0) | |
1627 | { | |
8a3fe4f8 | 1628 | error (_("bad array bounds (%d, %d)"), lowbound, highbound); |
c906108c | 1629 | } |
3ae385af | 1630 | typelength = type_length_units (value_enclosing_type (elemvec[0])); |
c906108c SS |
1631 | for (idx = 1; idx < nelem; idx++) |
1632 | { | |
3ae385af SM |
1633 | if (type_length_units (value_enclosing_type (elemvec[idx])) |
1634 | != typelength) | |
c906108c | 1635 | { |
8a3fe4f8 | 1636 | error (_("array elements must all be the same size")); |
c906108c SS |
1637 | } |
1638 | } | |
1639 | ||
e3506a9f UW |
1640 | arraytype = lookup_array_range_type (value_enclosing_type (elemvec[0]), |
1641 | lowbound, highbound); | |
c906108c SS |
1642 | |
1643 | if (!current_language->c_style_arrays) | |
1644 | { | |
1645 | val = allocate_value (arraytype); | |
1646 | for (idx = 0; idx < nelem; idx++) | |
39d37385 PA |
1647 | value_contents_copy (val, idx * typelength, elemvec[idx], 0, |
1648 | typelength); | |
c906108c SS |
1649 | return val; |
1650 | } | |
1651 | ||
63092375 DJ |
1652 | /* Allocate space to store the array, and then initialize it by |
1653 | copying in each element. */ | |
c906108c | 1654 | |
63092375 | 1655 | val = allocate_value (arraytype); |
c906108c | 1656 | for (idx = 0; idx < nelem; idx++) |
39d37385 | 1657 | value_contents_copy (val, idx * typelength, elemvec[idx], 0, typelength); |
63092375 | 1658 | return val; |
c906108c SS |
1659 | } |
1660 | ||
6c7a06a3 | 1661 | struct value * |
e3a3797e | 1662 | value_cstring (const char *ptr, ssize_t len, struct type *char_type) |
6c7a06a3 TT |
1663 | { |
1664 | struct value *val; | |
1665 | int lowbound = current_language->string_lower_bound; | |
63375b74 | 1666 | ssize_t highbound = len / TYPE_LENGTH (char_type); |
6c7a06a3 | 1667 | struct type *stringtype |
e3506a9f | 1668 | = lookup_array_range_type (char_type, lowbound, highbound + lowbound - 1); |
6c7a06a3 TT |
1669 | |
1670 | val = allocate_value (stringtype); | |
1671 | memcpy (value_contents_raw (val), ptr, len); | |
1672 | return val; | |
1673 | } | |
1674 | ||
ac3eeb49 MS |
1675 | /* Create a value for a string constant by allocating space in the |
1676 | inferior, copying the data into that space, and returning the | |
1677 | address with type TYPE_CODE_STRING. PTR points to the string | |
1678 | constant data; LEN is number of characters. | |
1679 | ||
1680 | Note that string types are like array of char types with a lower | |
1681 | bound of zero and an upper bound of LEN - 1. Also note that the | |
1682 | string may contain embedded null bytes. */ | |
c906108c | 1683 | |
f23631e4 | 1684 | struct value * |
7cc3f8e2 | 1685 | value_string (const char *ptr, ssize_t len, struct type *char_type) |
c906108c | 1686 | { |
f23631e4 | 1687 | struct value *val; |
c906108c | 1688 | int lowbound = current_language->string_lower_bound; |
63375b74 | 1689 | ssize_t highbound = len / TYPE_LENGTH (char_type); |
c906108c | 1690 | struct type *stringtype |
e3506a9f | 1691 | = lookup_string_range_type (char_type, lowbound, highbound + lowbound - 1); |
c906108c | 1692 | |
3b7538c0 UW |
1693 | val = allocate_value (stringtype); |
1694 | memcpy (value_contents_raw (val), ptr, len); | |
1695 | return val; | |
c906108c SS |
1696 | } |
1697 | ||
c906108c | 1698 | \f |
ac3eeb49 MS |
1699 | /* See if we can pass arguments in T2 to a function which takes |
1700 | arguments of types T1. T1 is a list of NARGS arguments, and T2 is | |
1701 | a NULL-terminated vector. If some arguments need coercion of some | |
1702 | sort, then the coerced values are written into T2. Return value is | |
1703 | 0 if the arguments could be matched, or the position at which they | |
1704 | differ if not. | |
c906108c | 1705 | |
ac3eeb49 MS |
1706 | STATICP is nonzero if the T1 argument list came from a static |
1707 | member function. T2 will still include the ``this'' pointer, but | |
1708 | it will be skipped. | |
c906108c SS |
1709 | |
1710 | For non-static member functions, we ignore the first argument, | |
ac3eeb49 MS |
1711 | which is the type of the instance variable. This is because we |
1712 | want to handle calls with objects from derived classes. This is | |
1713 | not entirely correct: we should actually check to make sure that a | |
c906108c SS |
1714 | requested operation is type secure, shouldn't we? FIXME. */ |
1715 | ||
1716 | static int | |
ad2f7632 DJ |
1717 | typecmp (int staticp, int varargs, int nargs, |
1718 | struct field t1[], struct value *t2[]) | |
c906108c SS |
1719 | { |
1720 | int i; | |
1721 | ||
1722 | if (t2 == 0) | |
ac3eeb49 MS |
1723 | internal_error (__FILE__, __LINE__, |
1724 | _("typecmp: no argument list")); | |
ad2f7632 | 1725 | |
ac3eeb49 MS |
1726 | /* Skip ``this'' argument if applicable. T2 will always include |
1727 | THIS. */ | |
4a1970e4 | 1728 | if (staticp) |
ad2f7632 DJ |
1729 | t2 ++; |
1730 | ||
1731 | for (i = 0; | |
1732 | (i < nargs) && TYPE_CODE (t1[i].type) != TYPE_CODE_VOID; | |
1733 | i++) | |
c906108c | 1734 | { |
c5aa993b | 1735 | struct type *tt1, *tt2; |
ad2f7632 | 1736 | |
c5aa993b JM |
1737 | if (!t2[i]) |
1738 | return i + 1; | |
ad2f7632 DJ |
1739 | |
1740 | tt1 = check_typedef (t1[i].type); | |
df407dfe | 1741 | tt2 = check_typedef (value_type (t2[i])); |
ad2f7632 | 1742 | |
aa006118 | 1743 | if (TYPE_IS_REFERENCE (tt1) |
8301c89e | 1744 | /* We should be doing hairy argument matching, as below. */ |
3e43a32a MS |
1745 | && (TYPE_CODE (check_typedef (TYPE_TARGET_TYPE (tt1))) |
1746 | == TYPE_CODE (tt2))) | |
c906108c SS |
1747 | { |
1748 | if (TYPE_CODE (tt2) == TYPE_CODE_ARRAY) | |
1749 | t2[i] = value_coerce_array (t2[i]); | |
1750 | else | |
a65cfae5 | 1751 | t2[i] = value_ref (t2[i], TYPE_CODE (tt1)); |
c906108c SS |
1752 | continue; |
1753 | } | |
1754 | ||
802db21b DB |
1755 | /* djb - 20000715 - Until the new type structure is in the |
1756 | place, and we can attempt things like implicit conversions, | |
1757 | we need to do this so you can take something like a map<const | |
1758 | char *>, and properly access map["hello"], because the | |
1759 | argument to [] will be a reference to a pointer to a char, | |
ac3eeb49 | 1760 | and the argument will be a pointer to a char. */ |
aa006118 | 1761 | while (TYPE_IS_REFERENCE (tt1) || TYPE_CODE (tt1) == TYPE_CODE_PTR) |
802db21b DB |
1762 | { |
1763 | tt1 = check_typedef( TYPE_TARGET_TYPE(tt1) ); | |
1764 | } | |
ac3eeb49 MS |
1765 | while (TYPE_CODE(tt2) == TYPE_CODE_ARRAY |
1766 | || TYPE_CODE(tt2) == TYPE_CODE_PTR | |
aa006118 | 1767 | || TYPE_IS_REFERENCE (tt2)) |
c906108c | 1768 | { |
ac3eeb49 | 1769 | tt2 = check_typedef (TYPE_TARGET_TYPE(tt2)); |
c906108c | 1770 | } |
c5aa993b JM |
1771 | if (TYPE_CODE (tt1) == TYPE_CODE (tt2)) |
1772 | continue; | |
ac3eeb49 MS |
1773 | /* Array to pointer is a `trivial conversion' according to the |
1774 | ARM. */ | |
c906108c | 1775 | |
ac3eeb49 MS |
1776 | /* We should be doing much hairier argument matching (see |
1777 | section 13.2 of the ARM), but as a quick kludge, just check | |
1778 | for the same type code. */ | |
df407dfe | 1779 | if (TYPE_CODE (t1[i].type) != TYPE_CODE (value_type (t2[i]))) |
c5aa993b | 1780 | return i + 1; |
c906108c | 1781 | } |
ad2f7632 | 1782 | if (varargs || t2[i] == NULL) |
c5aa993b | 1783 | return 0; |
ad2f7632 | 1784 | return i + 1; |
c906108c SS |
1785 | } |
1786 | ||
b1af9e97 TT |
1787 | /* Helper class for do_search_struct_field that updates *RESULT_PTR |
1788 | and *LAST_BOFFSET, and possibly throws an exception if the field | |
1789 | search has yielded ambiguous results. */ | |
c906108c | 1790 | |
b1af9e97 TT |
1791 | static void |
1792 | update_search_result (struct value **result_ptr, struct value *v, | |
6b850546 | 1793 | LONGEST *last_boffset, LONGEST boffset, |
b1af9e97 TT |
1794 | const char *name, struct type *type) |
1795 | { | |
1796 | if (v != NULL) | |
1797 | { | |
1798 | if (*result_ptr != NULL | |
1799 | /* The result is not ambiguous if all the classes that are | |
1800 | found occupy the same space. */ | |
1801 | && *last_boffset != boffset) | |
1802 | error (_("base class '%s' is ambiguous in type '%s'"), | |
1803 | name, TYPE_SAFE_NAME (type)); | |
1804 | *result_ptr = v; | |
1805 | *last_boffset = boffset; | |
1806 | } | |
1807 | } | |
c906108c | 1808 | |
b1af9e97 TT |
1809 | /* A helper for search_struct_field. This does all the work; most |
1810 | arguments are as passed to search_struct_field. The result is | |
1811 | stored in *RESULT_PTR, which must be initialized to NULL. | |
1812 | OUTERMOST_TYPE is the type of the initial type passed to | |
1813 | search_struct_field; this is used for error reporting when the | |
1814 | lookup is ambiguous. */ | |
1815 | ||
1816 | static void | |
6b850546 | 1817 | do_search_struct_field (const char *name, struct value *arg1, LONGEST offset, |
b1af9e97 TT |
1818 | struct type *type, int looking_for_baseclass, |
1819 | struct value **result_ptr, | |
6b850546 | 1820 | LONGEST *last_boffset, |
b1af9e97 | 1821 | struct type *outermost_type) |
c906108c SS |
1822 | { |
1823 | int i; | |
edf3d5f3 | 1824 | int nbases; |
c906108c | 1825 | |
f168693b | 1826 | type = check_typedef (type); |
edf3d5f3 | 1827 | nbases = TYPE_N_BASECLASSES (type); |
c906108c | 1828 | |
c5aa993b | 1829 | if (!looking_for_baseclass) |
c906108c SS |
1830 | for (i = TYPE_NFIELDS (type) - 1; i >= nbases; i--) |
1831 | { | |
0d5cff50 | 1832 | const char *t_field_name = TYPE_FIELD_NAME (type, i); |
c906108c | 1833 | |
db577aea | 1834 | if (t_field_name && (strcmp_iw (t_field_name, name) == 0)) |
c906108c | 1835 | { |
f23631e4 | 1836 | struct value *v; |
a109c7c1 | 1837 | |
d6a843b5 | 1838 | if (field_is_static (&TYPE_FIELD (type, i))) |
686d4def | 1839 | v = value_static_field (type, i); |
c906108c | 1840 | else |
b1af9e97 TT |
1841 | v = value_primitive_field (arg1, offset, i, type); |
1842 | *result_ptr = v; | |
1843 | return; | |
c906108c SS |
1844 | } |
1845 | ||
1846 | if (t_field_name | |
47c6ee49 | 1847 | && t_field_name[0] == '\0') |
c906108c SS |
1848 | { |
1849 | struct type *field_type = TYPE_FIELD_TYPE (type, i); | |
a109c7c1 | 1850 | |
c906108c SS |
1851 | if (TYPE_CODE (field_type) == TYPE_CODE_UNION |
1852 | || TYPE_CODE (field_type) == TYPE_CODE_STRUCT) | |
1853 | { | |
ac3eeb49 MS |
1854 | /* Look for a match through the fields of an anonymous |
1855 | union, or anonymous struct. C++ provides anonymous | |
1856 | unions. | |
c906108c | 1857 | |
1b831c93 AC |
1858 | In the GNU Chill (now deleted from GDB) |
1859 | implementation of variant record types, each | |
1860 | <alternative field> has an (anonymous) union type, | |
1861 | each member of the union represents a <variant | |
1862 | alternative>. Each <variant alternative> is | |
1863 | represented as a struct, with a member for each | |
1864 | <variant field>. */ | |
c5aa993b | 1865 | |
b1af9e97 | 1866 | struct value *v = NULL; |
6b850546 | 1867 | LONGEST new_offset = offset; |
c906108c | 1868 | |
db034ac5 AC |
1869 | /* This is pretty gross. In G++, the offset in an |
1870 | anonymous union is relative to the beginning of the | |
1b831c93 AC |
1871 | enclosing struct. In the GNU Chill (now deleted |
1872 | from GDB) implementation of variant records, the | |
1873 | bitpos is zero in an anonymous union field, so we | |
ac3eeb49 | 1874 | have to add the offset of the union here. */ |
c906108c SS |
1875 | if (TYPE_CODE (field_type) == TYPE_CODE_STRUCT |
1876 | || (TYPE_NFIELDS (field_type) > 0 | |
1877 | && TYPE_FIELD_BITPOS (field_type, 0) == 0)) | |
1878 | new_offset += TYPE_FIELD_BITPOS (type, i) / 8; | |
1879 | ||
b1af9e97 TT |
1880 | do_search_struct_field (name, arg1, new_offset, |
1881 | field_type, | |
1882 | looking_for_baseclass, &v, | |
1883 | last_boffset, | |
1884 | outermost_type); | |
c906108c | 1885 | if (v) |
b1af9e97 TT |
1886 | { |
1887 | *result_ptr = v; | |
1888 | return; | |
1889 | } | |
c906108c SS |
1890 | } |
1891 | } | |
1892 | } | |
1893 | ||
c5aa993b | 1894 | for (i = 0; i < nbases; i++) |
c906108c | 1895 | { |
b1af9e97 | 1896 | struct value *v = NULL; |
c906108c | 1897 | struct type *basetype = check_typedef (TYPE_BASECLASS (type, i)); |
ac3eeb49 MS |
1898 | /* If we are looking for baseclasses, this is what we get when |
1899 | we hit them. But it could happen that the base part's member | |
1900 | name is not yet filled in. */ | |
c906108c SS |
1901 | int found_baseclass = (looking_for_baseclass |
1902 | && TYPE_BASECLASS_NAME (type, i) != NULL | |
ac3eeb49 MS |
1903 | && (strcmp_iw (name, |
1904 | TYPE_BASECLASS_NAME (type, | |
1905 | i)) == 0)); | |
6b850546 | 1906 | LONGEST boffset = value_embedded_offset (arg1) + offset; |
c906108c SS |
1907 | |
1908 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
1909 | { | |
3e3d7139 | 1910 | struct value *v2; |
c906108c SS |
1911 | |
1912 | boffset = baseclass_offset (type, i, | |
8af8e3bc PA |
1913 | value_contents_for_printing (arg1), |
1914 | value_embedded_offset (arg1) + offset, | |
1915 | value_address (arg1), | |
1916 | arg1); | |
c906108c | 1917 | |
ac3eeb49 | 1918 | /* The virtual base class pointer might have been clobbered |
581e13c1 | 1919 | by the user program. Make sure that it still points to a |
ac3eeb49 | 1920 | valid memory location. */ |
c906108c | 1921 | |
1a334831 TT |
1922 | boffset += value_embedded_offset (arg1) + offset; |
1923 | if (boffset < 0 | |
1924 | || boffset >= TYPE_LENGTH (value_enclosing_type (arg1))) | |
c906108c SS |
1925 | { |
1926 | CORE_ADDR base_addr; | |
c5aa993b | 1927 | |
42ae5230 | 1928 | base_addr = value_address (arg1) + boffset; |
08039c9e | 1929 | v2 = value_at_lazy (basetype, base_addr); |
ac3eeb49 MS |
1930 | if (target_read_memory (base_addr, |
1931 | value_contents_raw (v2), | |
acc900c2 | 1932 | TYPE_LENGTH (value_type (v2))) != 0) |
8a3fe4f8 | 1933 | error (_("virtual baseclass botch")); |
c906108c SS |
1934 | } |
1935 | else | |
1936 | { | |
1a334831 TT |
1937 | v2 = value_copy (arg1); |
1938 | deprecated_set_value_type (v2, basetype); | |
1939 | set_value_embedded_offset (v2, boffset); | |
c906108c SS |
1940 | } |
1941 | ||
1942 | if (found_baseclass) | |
b1af9e97 TT |
1943 | v = v2; |
1944 | else | |
1945 | { | |
1946 | do_search_struct_field (name, v2, 0, | |
1947 | TYPE_BASECLASS (type, i), | |
1948 | looking_for_baseclass, | |
1949 | result_ptr, last_boffset, | |
1950 | outermost_type); | |
1951 | } | |
c906108c SS |
1952 | } |
1953 | else if (found_baseclass) | |
1954 | v = value_primitive_field (arg1, offset, i, type); | |
1955 | else | |
b1af9e97 TT |
1956 | { |
1957 | do_search_struct_field (name, arg1, | |
1958 | offset + TYPE_BASECLASS_BITPOS (type, | |
1959 | i) / 8, | |
1960 | basetype, looking_for_baseclass, | |
1961 | result_ptr, last_boffset, | |
1962 | outermost_type); | |
1963 | } | |
1964 | ||
1965 | update_search_result (result_ptr, v, last_boffset, | |
1966 | boffset, name, outermost_type); | |
c906108c | 1967 | } |
b1af9e97 TT |
1968 | } |
1969 | ||
1970 | /* Helper function used by value_struct_elt to recurse through | |
8a13d42d SM |
1971 | baseclasses. Look for a field NAME in ARG1. Search in it assuming |
1972 | it has (class) type TYPE. If found, return value, else return NULL. | |
b1af9e97 TT |
1973 | |
1974 | If LOOKING_FOR_BASECLASS, then instead of looking for struct | |
1975 | fields, look for a baseclass named NAME. */ | |
1976 | ||
1977 | static struct value * | |
8a13d42d | 1978 | search_struct_field (const char *name, struct value *arg1, |
b1af9e97 TT |
1979 | struct type *type, int looking_for_baseclass) |
1980 | { | |
1981 | struct value *result = NULL; | |
6b850546 | 1982 | LONGEST boffset = 0; |
b1af9e97 | 1983 | |
8a13d42d | 1984 | do_search_struct_field (name, arg1, 0, type, looking_for_baseclass, |
b1af9e97 TT |
1985 | &result, &boffset, type); |
1986 | return result; | |
c906108c SS |
1987 | } |
1988 | ||
ac3eeb49 | 1989 | /* Helper function used by value_struct_elt to recurse through |
581e13c1 | 1990 | baseclasses. Look for a field NAME in ARG1. Adjust the address of |
ac3eeb49 MS |
1991 | ARG1 by OFFSET bytes, and search in it assuming it has (class) type |
1992 | TYPE. | |
1993 | ||
1994 | If found, return value, else if name matched and args not return | |
1995 | (value) -1, else return NULL. */ | |
c906108c | 1996 | |
f23631e4 | 1997 | static struct value * |
714f19d5 | 1998 | search_struct_method (const char *name, struct value **arg1p, |
6b850546 | 1999 | struct value **args, LONGEST offset, |
aa1ee363 | 2000 | int *static_memfuncp, struct type *type) |
c906108c SS |
2001 | { |
2002 | int i; | |
f23631e4 | 2003 | struct value *v; |
c906108c SS |
2004 | int name_matched = 0; |
2005 | char dem_opname[64]; | |
2006 | ||
f168693b | 2007 | type = check_typedef (type); |
c906108c SS |
2008 | for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; i--) |
2009 | { | |
0d5cff50 | 2010 | const char *t_field_name = TYPE_FN_FIELDLIST_NAME (type, i); |
a109c7c1 | 2011 | |
581e13c1 | 2012 | /* FIXME! May need to check for ARM demangling here. */ |
61012eef GB |
2013 | if (startswith (t_field_name, "__") || |
2014 | startswith (t_field_name, "op") || | |
2015 | startswith (t_field_name, "type")) | |
c906108c | 2016 | { |
c5aa993b JM |
2017 | if (cplus_demangle_opname (t_field_name, dem_opname, DMGL_ANSI)) |
2018 | t_field_name = dem_opname; | |
2019 | else if (cplus_demangle_opname (t_field_name, dem_opname, 0)) | |
c906108c | 2020 | t_field_name = dem_opname; |
c906108c | 2021 | } |
db577aea | 2022 | if (t_field_name && (strcmp_iw (t_field_name, name) == 0)) |
c906108c SS |
2023 | { |
2024 | int j = TYPE_FN_FIELDLIST_LENGTH (type, i) - 1; | |
2025 | struct fn_field *f = TYPE_FN_FIELDLIST1 (type, i); | |
c906108c | 2026 | |
a109c7c1 | 2027 | name_matched = 1; |
de17c821 | 2028 | check_stub_method_group (type, i); |
c906108c | 2029 | if (j > 0 && args == 0) |
3e43a32a MS |
2030 | error (_("cannot resolve overloaded method " |
2031 | "`%s': no arguments supplied"), name); | |
acf5ed49 | 2032 | else if (j == 0 && args == 0) |
c906108c | 2033 | { |
acf5ed49 DJ |
2034 | v = value_fn_field (arg1p, f, j, type, offset); |
2035 | if (v != NULL) | |
2036 | return v; | |
c906108c | 2037 | } |
acf5ed49 DJ |
2038 | else |
2039 | while (j >= 0) | |
2040 | { | |
acf5ed49 | 2041 | if (!typecmp (TYPE_FN_FIELD_STATIC_P (f, j), |
ad2f7632 DJ |
2042 | TYPE_VARARGS (TYPE_FN_FIELD_TYPE (f, j)), |
2043 | TYPE_NFIELDS (TYPE_FN_FIELD_TYPE (f, j)), | |
acf5ed49 DJ |
2044 | TYPE_FN_FIELD_ARGS (f, j), args)) |
2045 | { | |
2046 | if (TYPE_FN_FIELD_VIRTUAL_P (f, j)) | |
ac3eeb49 MS |
2047 | return value_virtual_fn_field (arg1p, f, j, |
2048 | type, offset); | |
2049 | if (TYPE_FN_FIELD_STATIC_P (f, j) | |
2050 | && static_memfuncp) | |
acf5ed49 DJ |
2051 | *static_memfuncp = 1; |
2052 | v = value_fn_field (arg1p, f, j, type, offset); | |
2053 | if (v != NULL) | |
2054 | return v; | |
2055 | } | |
2056 | j--; | |
2057 | } | |
c906108c SS |
2058 | } |
2059 | } | |
2060 | ||
2061 | for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--) | |
2062 | { | |
6b850546 DT |
2063 | LONGEST base_offset; |
2064 | LONGEST this_offset; | |
c906108c SS |
2065 | |
2066 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
2067 | { | |
086280be | 2068 | struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i)); |
8af8e3bc | 2069 | struct value *base_val; |
086280be UW |
2070 | const gdb_byte *base_valaddr; |
2071 | ||
2072 | /* The virtual base class pointer might have been | |
581e13c1 | 2073 | clobbered by the user program. Make sure that it |
8301c89e | 2074 | still points to a valid memory location. */ |
086280be UW |
2075 | |
2076 | if (offset < 0 || offset >= TYPE_LENGTH (type)) | |
c5aa993b | 2077 | { |
6c18f3e0 SP |
2078 | gdb_byte *tmp; |
2079 | struct cleanup *back_to; | |
2080 | CORE_ADDR address; | |
2081 | ||
224c3ddb | 2082 | tmp = (gdb_byte *) xmalloc (TYPE_LENGTH (baseclass)); |
6c18f3e0 SP |
2083 | back_to = make_cleanup (xfree, tmp); |
2084 | address = value_address (*arg1p); | |
a109c7c1 | 2085 | |
8af8e3bc | 2086 | if (target_read_memory (address + offset, |
086280be UW |
2087 | tmp, TYPE_LENGTH (baseclass)) != 0) |
2088 | error (_("virtual baseclass botch")); | |
8af8e3bc PA |
2089 | |
2090 | base_val = value_from_contents_and_address (baseclass, | |
2091 | tmp, | |
2092 | address + offset); | |
2093 | base_valaddr = value_contents_for_printing (base_val); | |
2094 | this_offset = 0; | |
6c18f3e0 | 2095 | do_cleanups (back_to); |
c5aa993b JM |
2096 | } |
2097 | else | |
8af8e3bc PA |
2098 | { |
2099 | base_val = *arg1p; | |
2100 | base_valaddr = value_contents_for_printing (*arg1p); | |
2101 | this_offset = offset; | |
2102 | } | |
c5aa993b | 2103 | |
086280be | 2104 | base_offset = baseclass_offset (type, i, base_valaddr, |
8af8e3bc PA |
2105 | this_offset, value_address (base_val), |
2106 | base_val); | |
c5aa993b | 2107 | } |
c906108c SS |
2108 | else |
2109 | { | |
2110 | base_offset = TYPE_BASECLASS_BITPOS (type, i) / 8; | |
c5aa993b | 2111 | } |
c906108c SS |
2112 | v = search_struct_method (name, arg1p, args, base_offset + offset, |
2113 | static_memfuncp, TYPE_BASECLASS (type, i)); | |
f23631e4 | 2114 | if (v == (struct value *) - 1) |
c906108c SS |
2115 | { |
2116 | name_matched = 1; | |
2117 | } | |
2118 | else if (v) | |
2119 | { | |
ac3eeb49 MS |
2120 | /* FIXME-bothner: Why is this commented out? Why is it here? */ |
2121 | /* *arg1p = arg1_tmp; */ | |
c906108c | 2122 | return v; |
c5aa993b | 2123 | } |
c906108c | 2124 | } |
c5aa993b | 2125 | if (name_matched) |
f23631e4 | 2126 | return (struct value *) - 1; |
c5aa993b JM |
2127 | else |
2128 | return NULL; | |
c906108c SS |
2129 | } |
2130 | ||
2131 | /* Given *ARGP, a value of type (pointer to a)* structure/union, | |
ac3eeb49 MS |
2132 | extract the component named NAME from the ultimate target |
2133 | structure/union and return it as a value with its appropriate type. | |
c906108c SS |
2134 | ERR is used in the error message if *ARGP's type is wrong. |
2135 | ||
2136 | C++: ARGS is a list of argument types to aid in the selection of | |
581e13c1 | 2137 | an appropriate method. Also, handle derived types. |
c906108c SS |
2138 | |
2139 | STATIC_MEMFUNCP, if non-NULL, points to a caller-supplied location | |
2140 | where the truthvalue of whether the function that was resolved was | |
2141 | a static member function or not is stored. | |
2142 | ||
ac3eeb49 MS |
2143 | ERR is an error message to be printed in case the field is not |
2144 | found. */ | |
c906108c | 2145 | |
f23631e4 AC |
2146 | struct value * |
2147 | value_struct_elt (struct value **argp, struct value **args, | |
714f19d5 | 2148 | const char *name, int *static_memfuncp, const char *err) |
c906108c | 2149 | { |
52f0bd74 | 2150 | struct type *t; |
f23631e4 | 2151 | struct value *v; |
c906108c | 2152 | |
994b9211 | 2153 | *argp = coerce_array (*argp); |
c906108c | 2154 | |
df407dfe | 2155 | t = check_typedef (value_type (*argp)); |
c906108c SS |
2156 | |
2157 | /* Follow pointers until we get to a non-pointer. */ | |
2158 | ||
aa006118 | 2159 | while (TYPE_CODE (t) == TYPE_CODE_PTR || TYPE_IS_REFERENCE (t)) |
c906108c SS |
2160 | { |
2161 | *argp = value_ind (*argp); | |
2162 | /* Don't coerce fn pointer to fn and then back again! */ | |
b846d303 | 2163 | if (TYPE_CODE (check_typedef (value_type (*argp))) != TYPE_CODE_FUNC) |
994b9211 | 2164 | *argp = coerce_array (*argp); |
df407dfe | 2165 | t = check_typedef (value_type (*argp)); |
c906108c SS |
2166 | } |
2167 | ||
c5aa993b | 2168 | if (TYPE_CODE (t) != TYPE_CODE_STRUCT |
c906108c | 2169 | && TYPE_CODE (t) != TYPE_CODE_UNION) |
3e43a32a MS |
2170 | error (_("Attempt to extract a component of a value that is not a %s."), |
2171 | err); | |
c906108c SS |
2172 | |
2173 | /* Assume it's not, unless we see that it is. */ | |
2174 | if (static_memfuncp) | |
c5aa993b | 2175 | *static_memfuncp = 0; |
c906108c SS |
2176 | |
2177 | if (!args) | |
2178 | { | |
2179 | /* if there are no arguments ...do this... */ | |
2180 | ||
ac3eeb49 MS |
2181 | /* Try as a field first, because if we succeed, there is less |
2182 | work to be done. */ | |
8a13d42d | 2183 | v = search_struct_field (name, *argp, t, 0); |
c906108c SS |
2184 | if (v) |
2185 | return v; | |
2186 | ||
2187 | /* C++: If it was not found as a data field, then try to | |
7b83ea04 | 2188 | return it as a pointer to a method. */ |
ac3eeb49 MS |
2189 | v = search_struct_method (name, argp, args, 0, |
2190 | static_memfuncp, t); | |
c906108c | 2191 | |
f23631e4 | 2192 | if (v == (struct value *) - 1) |
55b39184 | 2193 | error (_("Cannot take address of method %s."), name); |
c906108c SS |
2194 | else if (v == 0) |
2195 | { | |
2196 | if (TYPE_NFN_FIELDS (t)) | |
8a3fe4f8 | 2197 | error (_("There is no member or method named %s."), name); |
c906108c | 2198 | else |
8a3fe4f8 | 2199 | error (_("There is no member named %s."), name); |
c906108c SS |
2200 | } |
2201 | return v; | |
2202 | } | |
2203 | ||
8301c89e DE |
2204 | v = search_struct_method (name, argp, args, 0, |
2205 | static_memfuncp, t); | |
7168a814 | 2206 | |
f23631e4 | 2207 | if (v == (struct value *) - 1) |
c906108c | 2208 | { |
3e43a32a MS |
2209 | error (_("One of the arguments you tried to pass to %s could not " |
2210 | "be converted to what the function wants."), name); | |
c906108c SS |
2211 | } |
2212 | else if (v == 0) | |
2213 | { | |
ac3eeb49 MS |
2214 | /* See if user tried to invoke data as function. If so, hand it |
2215 | back. If it's not callable (i.e., a pointer to function), | |
7b83ea04 | 2216 | gdb should give an error. */ |
8a13d42d | 2217 | v = search_struct_field (name, *argp, t, 0); |
fa8de41e TT |
2218 | /* If we found an ordinary field, then it is not a method call. |
2219 | So, treat it as if it were a static member function. */ | |
2220 | if (v && static_memfuncp) | |
2221 | *static_memfuncp = 1; | |
c906108c SS |
2222 | } |
2223 | ||
2224 | if (!v) | |
79afc5ef SW |
2225 | throw_error (NOT_FOUND_ERROR, |
2226 | _("Structure has no component named %s."), name); | |
c906108c SS |
2227 | return v; |
2228 | } | |
2229 | ||
b5b08fb4 SC |
2230 | /* Given *ARGP, a value of type structure or union, or a pointer/reference |
2231 | to a structure or union, extract and return its component (field) of | |
2232 | type FTYPE at the specified BITPOS. | |
2233 | Throw an exception on error. */ | |
2234 | ||
2235 | struct value * | |
2236 | value_struct_elt_bitpos (struct value **argp, int bitpos, struct type *ftype, | |
2237 | const char *err) | |
2238 | { | |
2239 | struct type *t; | |
b5b08fb4 | 2240 | int i; |
b5b08fb4 SC |
2241 | |
2242 | *argp = coerce_array (*argp); | |
2243 | ||
2244 | t = check_typedef (value_type (*argp)); | |
2245 | ||
aa006118 | 2246 | while (TYPE_CODE (t) == TYPE_CODE_PTR || TYPE_IS_REFERENCE (t)) |
b5b08fb4 SC |
2247 | { |
2248 | *argp = value_ind (*argp); | |
2249 | if (TYPE_CODE (check_typedef (value_type (*argp))) != TYPE_CODE_FUNC) | |
2250 | *argp = coerce_array (*argp); | |
2251 | t = check_typedef (value_type (*argp)); | |
2252 | } | |
2253 | ||
2254 | if (TYPE_CODE (t) != TYPE_CODE_STRUCT | |
2255 | && TYPE_CODE (t) != TYPE_CODE_UNION) | |
2256 | error (_("Attempt to extract a component of a value that is not a %s."), | |
2257 | err); | |
2258 | ||
2259 | for (i = TYPE_N_BASECLASSES (t); i < TYPE_NFIELDS (t); i++) | |
2260 | { | |
2261 | if (!field_is_static (&TYPE_FIELD (t, i)) | |
2262 | && bitpos == TYPE_FIELD_BITPOS (t, i) | |
2263 | && types_equal (ftype, TYPE_FIELD_TYPE (t, i))) | |
2264 | return value_primitive_field (*argp, 0, i, t); | |
2265 | } | |
2266 | ||
2267 | error (_("No field with matching bitpos and type.")); | |
2268 | ||
2269 | /* Never hit. */ | |
2270 | return NULL; | |
2271 | } | |
2272 | ||
ac3eeb49 | 2273 | /* Search through the methods of an object (and its bases) to find a |
233e8b28 SC |
2274 | specified method. Return the pointer to the fn_field list FN_LIST of |
2275 | overloaded instances defined in the source language. If available | |
2276 | and matching, a vector of matching xmethods defined in extension | |
2277 | languages are also returned in XM_WORKER_VEC | |
ac3eeb49 MS |
2278 | |
2279 | Helper function for value_find_oload_list. | |
2280 | ARGP is a pointer to a pointer to a value (the object). | |
2281 | METHOD is a string containing the method name. | |
2282 | OFFSET is the offset within the value. | |
2283 | TYPE is the assumed type of the object. | |
233e8b28 SC |
2284 | FN_LIST is the pointer to matching overloaded instances defined in |
2285 | source language. Since this is a recursive function, *FN_LIST | |
2286 | should be set to NULL when calling this function. | |
2287 | NUM_FNS is the number of overloaded instances. *NUM_FNS should be set to | |
2288 | 0 when calling this function. | |
2289 | XM_WORKER_VEC is the vector of matching xmethod workers. *XM_WORKER_VEC | |
2290 | should also be set to NULL when calling this function. | |
ac3eeb49 MS |
2291 | BASETYPE is set to the actual type of the subobject where the |
2292 | method is found. | |
581e13c1 | 2293 | BOFFSET is the offset of the base subobject where the method is found. */ |
c906108c | 2294 | |
233e8b28 | 2295 | static void |
714f19d5 | 2296 | find_method_list (struct value **argp, const char *method, |
6b850546 | 2297 | LONGEST offset, struct type *type, |
233e8b28 SC |
2298 | struct fn_field **fn_list, int *num_fns, |
2299 | VEC (xmethod_worker_ptr) **xm_worker_vec, | |
6b850546 | 2300 | struct type **basetype, LONGEST *boffset) |
c906108c SS |
2301 | { |
2302 | int i; | |
233e8b28 SC |
2303 | struct fn_field *f = NULL; |
2304 | VEC (xmethod_worker_ptr) *worker_vec = NULL, *new_vec = NULL; | |
c906108c | 2305 | |
233e8b28 | 2306 | gdb_assert (fn_list != NULL && xm_worker_vec != NULL); |
f168693b | 2307 | type = check_typedef (type); |
c906108c | 2308 | |
233e8b28 SC |
2309 | /* First check in object itself. |
2310 | This function is called recursively to search through base classes. | |
2311 | If there is a source method match found at some stage, then we need not | |
2312 | look for source methods in consequent recursive calls. */ | |
2313 | if ((*fn_list) == NULL) | |
c906108c | 2314 | { |
233e8b28 | 2315 | for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; i--) |
c5aa993b | 2316 | { |
233e8b28 SC |
2317 | /* pai: FIXME What about operators and type conversions? */ |
2318 | const char *fn_field_name = TYPE_FN_FIELDLIST_NAME (type, i); | |
2319 | ||
2320 | if (fn_field_name && (strcmp_iw (fn_field_name, method) == 0)) | |
2321 | { | |
2322 | int len = TYPE_FN_FIELDLIST_LENGTH (type, i); | |
2323 | f = TYPE_FN_FIELDLIST1 (type, i); | |
2324 | *fn_list = f; | |
4a1970e4 | 2325 | |
233e8b28 SC |
2326 | *num_fns = len; |
2327 | *basetype = type; | |
2328 | *boffset = offset; | |
4a1970e4 | 2329 | |
233e8b28 SC |
2330 | /* Resolve any stub methods. */ |
2331 | check_stub_method_group (type, i); | |
4a1970e4 | 2332 | |
233e8b28 SC |
2333 | break; |
2334 | } | |
c5aa993b JM |
2335 | } |
2336 | } | |
2337 | ||
233e8b28 SC |
2338 | /* Unlike source methods, xmethods can be accumulated over successive |
2339 | recursive calls. In other words, an xmethod named 'm' in a class | |
2340 | will not hide an xmethod named 'm' in its base class(es). We want | |
2341 | it to be this way because xmethods are after all convenience functions | |
2342 | and hence there is no point restricting them with something like method | |
2343 | hiding. Moreover, if hiding is done for xmethods as well, then we will | |
2344 | have to provide a mechanism to un-hide (like the 'using' construct). */ | |
2345 | worker_vec = get_matching_xmethod_workers (type, method); | |
2346 | new_vec = VEC_merge (xmethod_worker_ptr, *xm_worker_vec, worker_vec); | |
2347 | ||
2348 | VEC_free (xmethod_worker_ptr, *xm_worker_vec); | |
2349 | VEC_free (xmethod_worker_ptr, worker_vec); | |
2350 | *xm_worker_vec = new_vec; | |
2351 | ||
2352 | /* If source methods are not found in current class, look for them in the | |
2353 | base classes. We also have to go through the base classes to gather | |
2354 | extension methods. */ | |
c906108c SS |
2355 | for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--) |
2356 | { | |
6b850546 | 2357 | LONGEST base_offset; |
a109c7c1 | 2358 | |
c906108c SS |
2359 | if (BASETYPE_VIA_VIRTUAL (type, i)) |
2360 | { | |
086280be | 2361 | base_offset = baseclass_offset (type, i, |
8af8e3bc PA |
2362 | value_contents_for_printing (*argp), |
2363 | value_offset (*argp) + offset, | |
2364 | value_address (*argp), *argp); | |
c5aa993b | 2365 | } |
ac3eeb49 MS |
2366 | else /* Non-virtual base, simply use bit position from debug |
2367 | info. */ | |
c906108c SS |
2368 | { |
2369 | base_offset = TYPE_BASECLASS_BITPOS (type, i) / 8; | |
c5aa993b | 2370 | } |
233e8b28 SC |
2371 | |
2372 | find_method_list (argp, method, base_offset + offset, | |
2373 | TYPE_BASECLASS (type, i), fn_list, num_fns, | |
2374 | xm_worker_vec, basetype, boffset); | |
c906108c | 2375 | } |
c906108c SS |
2376 | } |
2377 | ||
233e8b28 SC |
2378 | /* Return the list of overloaded methods of a specified name. The methods |
2379 | could be those GDB finds in the binary, or xmethod. Methods found in | |
2380 | the binary are returned in FN_LIST, and xmethods are returned in | |
2381 | XM_WORKER_VEC. | |
ac3eeb49 MS |
2382 | |
2383 | ARGP is a pointer to a pointer to a value (the object). | |
2384 | METHOD is the method name. | |
2385 | OFFSET is the offset within the value contents. | |
233e8b28 SC |
2386 | FN_LIST is the pointer to matching overloaded instances defined in |
2387 | source language. | |
ac3eeb49 | 2388 | NUM_FNS is the number of overloaded instances. |
233e8b28 SC |
2389 | XM_WORKER_VEC is the vector of matching xmethod workers defined in |
2390 | extension languages. | |
ac3eeb49 MS |
2391 | BASETYPE is set to the type of the base subobject that defines the |
2392 | method. | |
581e13c1 | 2393 | BOFFSET is the offset of the base subobject which defines the method. */ |
c906108c | 2394 | |
233e8b28 | 2395 | static void |
714f19d5 | 2396 | value_find_oload_method_list (struct value **argp, const char *method, |
6b850546 | 2397 | LONGEST offset, struct fn_field **fn_list, |
233e8b28 SC |
2398 | int *num_fns, |
2399 | VEC (xmethod_worker_ptr) **xm_worker_vec, | |
6b850546 | 2400 | struct type **basetype, LONGEST *boffset) |
c906108c | 2401 | { |
c5aa993b | 2402 | struct type *t; |
c906108c | 2403 | |
df407dfe | 2404 | t = check_typedef (value_type (*argp)); |
c906108c | 2405 | |
ac3eeb49 | 2406 | /* Code snarfed from value_struct_elt. */ |
aa006118 | 2407 | while (TYPE_CODE (t) == TYPE_CODE_PTR || TYPE_IS_REFERENCE (t)) |
c906108c SS |
2408 | { |
2409 | *argp = value_ind (*argp); | |
2410 | /* Don't coerce fn pointer to fn and then back again! */ | |
b846d303 | 2411 | if (TYPE_CODE (check_typedef (value_type (*argp))) != TYPE_CODE_FUNC) |
994b9211 | 2412 | *argp = coerce_array (*argp); |
df407dfe | 2413 | t = check_typedef (value_type (*argp)); |
c906108c | 2414 | } |
c5aa993b | 2415 | |
c5aa993b JM |
2416 | if (TYPE_CODE (t) != TYPE_CODE_STRUCT |
2417 | && TYPE_CODE (t) != TYPE_CODE_UNION) | |
3e43a32a MS |
2418 | error (_("Attempt to extract a component of a " |
2419 | "value that is not a struct or union")); | |
c5aa993b | 2420 | |
233e8b28 SC |
2421 | gdb_assert (fn_list != NULL && xm_worker_vec != NULL); |
2422 | ||
2423 | /* Clear the lists. */ | |
2424 | *fn_list = NULL; | |
2425 | *num_fns = 0; | |
2426 | *xm_worker_vec = NULL; | |
2427 | ||
2428 | find_method_list (argp, method, 0, t, fn_list, num_fns, xm_worker_vec, | |
2429 | basetype, boffset); | |
c906108c SS |
2430 | } |
2431 | ||
da096638 | 2432 | /* Given an array of arguments (ARGS) (which includes an |
c906108c | 2433 | entry for "this" in the case of C++ methods), the number of |
28c64fc2 SCR |
2434 | arguments NARGS, the NAME of a function, and whether it's a method or |
2435 | not (METHOD), find the best function that matches on the argument types | |
2436 | according to the overload resolution rules. | |
c906108c | 2437 | |
4c3376c8 SW |
2438 | METHOD can be one of three values: |
2439 | NON_METHOD for non-member functions. | |
2440 | METHOD: for member functions. | |
2441 | BOTH: used for overload resolution of operators where the | |
2442 | candidates are expected to be either member or non member | |
581e13c1 | 2443 | functions. In this case the first argument ARGTYPES |
4c3376c8 SW |
2444 | (representing 'this') is expected to be a reference to the |
2445 | target object, and will be dereferenced when attempting the | |
2446 | non-member search. | |
2447 | ||
c906108c SS |
2448 | In the case of class methods, the parameter OBJ is an object value |
2449 | in which to search for overloaded methods. | |
2450 | ||
2451 | In the case of non-method functions, the parameter FSYM is a symbol | |
2452 | corresponding to one of the overloaded functions. | |
2453 | ||
2454 | Return value is an integer: 0 -> good match, 10 -> debugger applied | |
2455 | non-standard coercions, 100 -> incompatible. | |
2456 | ||
2457 | If a method is being searched for, VALP will hold the value. | |
ac3eeb49 MS |
2458 | If a non-method is being searched for, SYMP will hold the symbol |
2459 | for it. | |
c906108c SS |
2460 | |
2461 | If a method is being searched for, and it is a static method, | |
2462 | then STATICP will point to a non-zero value. | |
2463 | ||
7322dca9 SW |
2464 | If NO_ADL argument dependent lookup is disabled. This is used to prevent |
2465 | ADL overload candidates when performing overload resolution for a fully | |
2466 | qualified name. | |
2467 | ||
e66d4446 SC |
2468 | If NOSIDE is EVAL_AVOID_SIDE_EFFECTS, then OBJP's memory cannot be |
2469 | read while picking the best overload match (it may be all zeroes and thus | |
2470 | not have a vtable pointer), in which case skip virtual function lookup. | |
2471 | This is ok as typically EVAL_AVOID_SIDE_EFFECTS is only used to determine | |
2472 | the result type. | |
2473 | ||
c906108c SS |
2474 | Note: This function does *not* check the value of |
2475 | overload_resolution. Caller must check it to see whether overload | |
581e13c1 | 2476 | resolution is permitted. */ |
c906108c SS |
2477 | |
2478 | int | |
da096638 | 2479 | find_overload_match (struct value **args, int nargs, |
4c3376c8 | 2480 | const char *name, enum oload_search_type method, |
28c64fc2 | 2481 | struct value **objp, struct symbol *fsym, |
ac3eeb49 | 2482 | struct value **valp, struct symbol **symp, |
e66d4446 SC |
2483 | int *staticp, const int no_adl, |
2484 | const enum noside noside) | |
c906108c | 2485 | { |
7f8c9282 | 2486 | struct value *obj = (objp ? *objp : NULL); |
da096638 | 2487 | struct type *obj_type = obj ? value_type (obj) : NULL; |
ac3eeb49 | 2488 | /* Index of best overloaded function. */ |
4c3376c8 SW |
2489 | int func_oload_champ = -1; |
2490 | int method_oload_champ = -1; | |
233e8b28 SC |
2491 | int src_method_oload_champ = -1; |
2492 | int ext_method_oload_champ = -1; | |
4c3376c8 | 2493 | |
ac3eeb49 | 2494 | /* The measure for the current best match. */ |
4c3376c8 SW |
2495 | struct badness_vector *method_badness = NULL; |
2496 | struct badness_vector *func_badness = NULL; | |
233e8b28 SC |
2497 | struct badness_vector *ext_method_badness = NULL; |
2498 | struct badness_vector *src_method_badness = NULL; | |
4c3376c8 | 2499 | |
f23631e4 | 2500 | struct value *temp = obj; |
ac3eeb49 MS |
2501 | /* For methods, the list of overloaded methods. */ |
2502 | struct fn_field *fns_ptr = NULL; | |
2503 | /* For non-methods, the list of overloaded function symbols. */ | |
2504 | struct symbol **oload_syms = NULL; | |
233e8b28 SC |
2505 | /* For xmethods, the VEC of xmethod workers. */ |
2506 | VEC (xmethod_worker_ptr) *xm_worker_vec = NULL; | |
ac3eeb49 MS |
2507 | /* Number of overloaded instances being considered. */ |
2508 | int num_fns = 0; | |
c5aa993b | 2509 | struct type *basetype = NULL; |
6b850546 | 2510 | LONGEST boffset; |
7322dca9 SW |
2511 | |
2512 | struct cleanup *all_cleanups = make_cleanup (null_cleanup, NULL); | |
c906108c | 2513 | |
8d577d32 | 2514 | const char *obj_type_name = NULL; |
7322dca9 | 2515 | const char *func_name = NULL; |
8d577d32 | 2516 | enum oload_classification match_quality; |
4c3376c8 | 2517 | enum oload_classification method_match_quality = INCOMPATIBLE; |
233e8b28 SC |
2518 | enum oload_classification src_method_match_quality = INCOMPATIBLE; |
2519 | enum oload_classification ext_method_match_quality = INCOMPATIBLE; | |
4c3376c8 | 2520 | enum oload_classification func_match_quality = INCOMPATIBLE; |
c906108c | 2521 | |
ac3eeb49 | 2522 | /* Get the list of overloaded methods or functions. */ |
4c3376c8 | 2523 | if (method == METHOD || method == BOTH) |
c906108c | 2524 | { |
a2ca50ae | 2525 | gdb_assert (obj); |
94af9270 KS |
2526 | |
2527 | /* OBJ may be a pointer value rather than the object itself. */ | |
2528 | obj = coerce_ref (obj); | |
2529 | while (TYPE_CODE (check_typedef (value_type (obj))) == TYPE_CODE_PTR) | |
2530 | obj = coerce_ref (value_ind (obj)); | |
df407dfe | 2531 | obj_type_name = TYPE_NAME (value_type (obj)); |
94af9270 KS |
2532 | |
2533 | /* First check whether this is a data member, e.g. a pointer to | |
2534 | a function. */ | |
2535 | if (TYPE_CODE (check_typedef (value_type (obj))) == TYPE_CODE_STRUCT) | |
2536 | { | |
8a13d42d | 2537 | *valp = search_struct_field (name, obj, |
94af9270 KS |
2538 | check_typedef (value_type (obj)), 0); |
2539 | if (*valp) | |
2540 | { | |
2541 | *staticp = 1; | |
f748fb40 | 2542 | do_cleanups (all_cleanups); |
94af9270 KS |
2543 | return 0; |
2544 | } | |
2545 | } | |
c906108c | 2546 | |
4c3376c8 | 2547 | /* Retrieve the list of methods with the name NAME. */ |
233e8b28 SC |
2548 | value_find_oload_method_list (&temp, name, 0, &fns_ptr, &num_fns, |
2549 | &xm_worker_vec, &basetype, &boffset); | |
4c3376c8 SW |
2550 | /* If this is a method only search, and no methods were found |
2551 | the search has faild. */ | |
233e8b28 | 2552 | if (method == METHOD && (!fns_ptr || !num_fns) && !xm_worker_vec) |
8a3fe4f8 | 2553 | error (_("Couldn't find method %s%s%s"), |
c5aa993b JM |
2554 | obj_type_name, |
2555 | (obj_type_name && *obj_type_name) ? "::" : "", | |
2556 | name); | |
4a1970e4 | 2557 | /* If we are dealing with stub method types, they should have |
ac3eeb49 MS |
2558 | been resolved by find_method_list via |
2559 | value_find_oload_method_list above. */ | |
4c3376c8 SW |
2560 | if (fns_ptr) |
2561 | { | |
4bfb94b8 | 2562 | gdb_assert (TYPE_SELF_TYPE (fns_ptr[0].type) != NULL); |
4c3376c8 | 2563 | |
233e8b28 SC |
2564 | src_method_oload_champ = find_oload_champ (args, nargs, |
2565 | num_fns, fns_ptr, NULL, | |
2566 | NULL, &src_method_badness); | |
2567 | ||
2568 | src_method_match_quality = classify_oload_match | |
2569 | (src_method_badness, nargs, | |
2570 | oload_method_static_p (fns_ptr, src_method_oload_champ)); | |
2571 | ||
2572 | make_cleanup (xfree, src_method_badness); | |
2573 | } | |
4c3376c8 | 2574 | |
233e8b28 SC |
2575 | if (VEC_length (xmethod_worker_ptr, xm_worker_vec) > 0) |
2576 | { | |
2577 | ext_method_oload_champ = find_oload_champ (args, nargs, | |
2578 | 0, NULL, xm_worker_vec, | |
2579 | NULL, &ext_method_badness); | |
2580 | ext_method_match_quality = classify_oload_match (ext_method_badness, | |
2581 | nargs, 0); | |
2582 | make_cleanup (xfree, ext_method_badness); | |
2583 | make_cleanup (free_xmethod_worker_vec, xm_worker_vec); | |
4c3376c8 SW |
2584 | } |
2585 | ||
233e8b28 SC |
2586 | if (src_method_oload_champ >= 0 && ext_method_oload_champ >= 0) |
2587 | { | |
2588 | switch (compare_badness (ext_method_badness, src_method_badness)) | |
2589 | { | |
2590 | case 0: /* Src method and xmethod are equally good. */ | |
233e8b28 SC |
2591 | /* If src method and xmethod are equally good, then |
2592 | xmethod should be the winner. Hence, fall through to the | |
2593 | case where a xmethod is better than the source | |
2594 | method, except when the xmethod match quality is | |
2595 | non-standard. */ | |
2596 | /* FALLTHROUGH */ | |
2597 | case 1: /* Src method and ext method are incompatible. */ | |
2598 | /* If ext method match is not standard, then let source method | |
2599 | win. Otherwise, fallthrough to let xmethod win. */ | |
2600 | if (ext_method_match_quality != STANDARD) | |
2601 | { | |
2602 | method_oload_champ = src_method_oload_champ; | |
2603 | method_badness = src_method_badness; | |
2604 | ext_method_oload_champ = -1; | |
2605 | method_match_quality = src_method_match_quality; | |
2606 | break; | |
2607 | } | |
2608 | /* FALLTHROUGH */ | |
2609 | case 2: /* Ext method is champion. */ | |
2610 | method_oload_champ = ext_method_oload_champ; | |
2611 | method_badness = ext_method_badness; | |
2612 | src_method_oload_champ = -1; | |
2613 | method_match_quality = ext_method_match_quality; | |
2614 | break; | |
2615 | case 3: /* Src method is champion. */ | |
2616 | method_oload_champ = src_method_oload_champ; | |
2617 | method_badness = src_method_badness; | |
2618 | ext_method_oload_champ = -1; | |
2619 | method_match_quality = src_method_match_quality; | |
2620 | break; | |
2621 | default: | |
2622 | gdb_assert_not_reached ("Unexpected overload comparison " | |
2623 | "result"); | |
2624 | break; | |
2625 | } | |
2626 | } | |
2627 | else if (src_method_oload_champ >= 0) | |
2628 | { | |
2629 | method_oload_champ = src_method_oload_champ; | |
2630 | method_badness = src_method_badness; | |
2631 | method_match_quality = src_method_match_quality; | |
2632 | } | |
2633 | else if (ext_method_oload_champ >= 0) | |
2634 | { | |
2635 | method_oload_champ = ext_method_oload_champ; | |
2636 | method_badness = ext_method_badness; | |
2637 | method_match_quality = ext_method_match_quality; | |
2638 | } | |
c906108c | 2639 | } |
4c3376c8 SW |
2640 | |
2641 | if (method == NON_METHOD || method == BOTH) | |
c906108c | 2642 | { |
7322dca9 | 2643 | const char *qualified_name = NULL; |
c906108c | 2644 | |
b021a221 MS |
2645 | /* If the overload match is being search for both as a method |
2646 | and non member function, the first argument must now be | |
2647 | dereferenced. */ | |
4c3376c8 | 2648 | if (method == BOTH) |
2b214ea6 | 2649 | args[0] = value_ind (args[0]); |
4c3376c8 | 2650 | |
7322dca9 SW |
2651 | if (fsym) |
2652 | { | |
2653 | qualified_name = SYMBOL_NATURAL_NAME (fsym); | |
2654 | ||
2655 | /* If we have a function with a C++ name, try to extract just | |
2656 | the function part. Do not try this for non-functions (e.g. | |
2657 | function pointers). */ | |
2658 | if (qualified_name | |
3e43a32a MS |
2659 | && TYPE_CODE (check_typedef (SYMBOL_TYPE (fsym))) |
2660 | == TYPE_CODE_FUNC) | |
7322dca9 SW |
2661 | { |
2662 | char *temp; | |
2663 | ||
2664 | temp = cp_func_name (qualified_name); | |
2665 | ||
2666 | /* If cp_func_name did not remove anything, the name of the | |
2667 | symbol did not include scope or argument types - it was | |
2668 | probably a C-style function. */ | |
2669 | if (temp) | |
2670 | { | |
2671 | make_cleanup (xfree, temp); | |
2672 | if (strcmp (temp, qualified_name) == 0) | |
2673 | func_name = NULL; | |
2674 | else | |
2675 | func_name = temp; | |
2676 | } | |
2677 | } | |
2678 | } | |
2679 | else | |
94af9270 | 2680 | { |
7322dca9 SW |
2681 | func_name = name; |
2682 | qualified_name = name; | |
94af9270 | 2683 | } |
d9639e13 | 2684 | |
94af9270 KS |
2685 | /* If there was no C++ name, this must be a C-style function or |
2686 | not a function at all. Just return the same symbol. Do the | |
2687 | same if cp_func_name fails for some reason. */ | |
8d577d32 | 2688 | if (func_name == NULL) |
7b83ea04 | 2689 | { |
917317f4 | 2690 | *symp = fsym; |
5fe41fbf | 2691 | do_cleanups (all_cleanups); |
7b83ea04 AC |
2692 | return 0; |
2693 | } | |
917317f4 | 2694 | |
da096638 | 2695 | func_oload_champ = find_oload_champ_namespace (args, nargs, |
4c3376c8 SW |
2696 | func_name, |
2697 | qualified_name, | |
2698 | &oload_syms, | |
2699 | &func_badness, | |
2700 | no_adl); | |
8d577d32 | 2701 | |
4c3376c8 SW |
2702 | if (func_oload_champ >= 0) |
2703 | func_match_quality = classify_oload_match (func_badness, nargs, 0); | |
2704 | ||
2705 | make_cleanup (xfree, oload_syms); | |
2706 | make_cleanup (xfree, func_badness); | |
8d577d32 DC |
2707 | } |
2708 | ||
7322dca9 | 2709 | /* Did we find a match ? */ |
4c3376c8 | 2710 | if (method_oload_champ == -1 && func_oload_champ == -1) |
79afc5ef SW |
2711 | throw_error (NOT_FOUND_ERROR, |
2712 | _("No symbol \"%s\" in current context."), | |
2713 | name); | |
8d577d32 | 2714 | |
4c3376c8 SW |
2715 | /* If we have found both a method match and a function |
2716 | match, find out which one is better, and calculate match | |
2717 | quality. */ | |
2718 | if (method_oload_champ >= 0 && func_oload_champ >= 0) | |
2719 | { | |
2720 | switch (compare_badness (func_badness, method_badness)) | |
2721 | { | |
2722 | case 0: /* Top two contenders are equally good. */ | |
b021a221 MS |
2723 | /* FIXME: GDB does not support the general ambiguous case. |
2724 | All candidates should be collected and presented the | |
2725 | user. */ | |
4c3376c8 SW |
2726 | error (_("Ambiguous overload resolution")); |
2727 | break; | |
2728 | case 1: /* Incomparable top contenders. */ | |
2729 | /* This is an error incompatible candidates | |
2730 | should not have been proposed. */ | |
3e43a32a MS |
2731 | error (_("Internal error: incompatible " |
2732 | "overload candidates proposed")); | |
4c3376c8 SW |
2733 | break; |
2734 | case 2: /* Function champion. */ | |
2735 | method_oload_champ = -1; | |
2736 | match_quality = func_match_quality; | |
2737 | break; | |
2738 | case 3: /* Method champion. */ | |
2739 | func_oload_champ = -1; | |
2740 | match_quality = method_match_quality; | |
2741 | break; | |
2742 | default: | |
2743 | error (_("Internal error: unexpected overload comparison result")); | |
2744 | break; | |
2745 | } | |
2746 | } | |
2747 | else | |
2748 | { | |
2749 | /* We have either a method match or a function match. */ | |
2750 | if (method_oload_champ >= 0) | |
2751 | match_quality = method_match_quality; | |
2752 | else | |
2753 | match_quality = func_match_quality; | |
2754 | } | |
8d577d32 DC |
2755 | |
2756 | if (match_quality == INCOMPATIBLE) | |
2757 | { | |
4c3376c8 | 2758 | if (method == METHOD) |
8a3fe4f8 | 2759 | error (_("Cannot resolve method %s%s%s to any overloaded instance"), |
8d577d32 DC |
2760 | obj_type_name, |
2761 | (obj_type_name && *obj_type_name) ? "::" : "", | |
2762 | name); | |
2763 | else | |
8a3fe4f8 | 2764 | error (_("Cannot resolve function %s to any overloaded instance"), |
8d577d32 DC |
2765 | func_name); |
2766 | } | |
2767 | else if (match_quality == NON_STANDARD) | |
2768 | { | |
4c3376c8 | 2769 | if (method == METHOD) |
3e43a32a MS |
2770 | warning (_("Using non-standard conversion to match " |
2771 | "method %s%s%s to supplied arguments"), | |
8d577d32 DC |
2772 | obj_type_name, |
2773 | (obj_type_name && *obj_type_name) ? "::" : "", | |
2774 | name); | |
2775 | else | |
3e43a32a MS |
2776 | warning (_("Using non-standard conversion to match " |
2777 | "function %s to supplied arguments"), | |
8d577d32 DC |
2778 | func_name); |
2779 | } | |
2780 | ||
4c3376c8 | 2781 | if (staticp != NULL) |
2bca57ba | 2782 | *staticp = oload_method_static_p (fns_ptr, method_oload_champ); |
4c3376c8 SW |
2783 | |
2784 | if (method_oload_champ >= 0) | |
8d577d32 | 2785 | { |
233e8b28 SC |
2786 | if (src_method_oload_champ >= 0) |
2787 | { | |
e66d4446 SC |
2788 | if (TYPE_FN_FIELD_VIRTUAL_P (fns_ptr, method_oload_champ) |
2789 | && noside != EVAL_AVOID_SIDE_EFFECTS) | |
2790 | { | |
2791 | *valp = value_virtual_fn_field (&temp, fns_ptr, | |
2792 | method_oload_champ, basetype, | |
2793 | boffset); | |
2794 | } | |
233e8b28 SC |
2795 | else |
2796 | *valp = value_fn_field (&temp, fns_ptr, method_oload_champ, | |
2797 | basetype, boffset); | |
2798 | } | |
8d577d32 | 2799 | else |
233e8b28 SC |
2800 | { |
2801 | *valp = value_of_xmethod (clone_xmethod_worker | |
2802 | (VEC_index (xmethod_worker_ptr, xm_worker_vec, | |
2803 | ext_method_oload_champ))); | |
2804 | } | |
8d577d32 DC |
2805 | } |
2806 | else | |
4c3376c8 | 2807 | *symp = oload_syms[func_oload_champ]; |
8d577d32 DC |
2808 | |
2809 | if (objp) | |
2810 | { | |
a4295225 | 2811 | struct type *temp_type = check_typedef (value_type (temp)); |
da096638 | 2812 | struct type *objtype = check_typedef (obj_type); |
a109c7c1 | 2813 | |
a4295225 | 2814 | if (TYPE_CODE (temp_type) != TYPE_CODE_PTR |
da096638 | 2815 | && (TYPE_CODE (objtype) == TYPE_CODE_PTR |
aa006118 | 2816 | || TYPE_IS_REFERENCE (objtype))) |
8d577d32 DC |
2817 | { |
2818 | temp = value_addr (temp); | |
2819 | } | |
2820 | *objp = temp; | |
2821 | } | |
7322dca9 SW |
2822 | |
2823 | do_cleanups (all_cleanups); | |
8d577d32 DC |
2824 | |
2825 | switch (match_quality) | |
2826 | { | |
2827 | case INCOMPATIBLE: | |
2828 | return 100; | |
2829 | case NON_STANDARD: | |
2830 | return 10; | |
2831 | default: /* STANDARD */ | |
2832 | return 0; | |
2833 | } | |
2834 | } | |
2835 | ||
2836 | /* Find the best overload match, searching for FUNC_NAME in namespaces | |
2837 | contained in QUALIFIED_NAME until it either finds a good match or | |
2838 | runs out of namespaces. It stores the overloaded functions in | |
2839 | *OLOAD_SYMS, and the badness vector in *OLOAD_CHAMP_BV. The | |
2840 | calling function is responsible for freeing *OLOAD_SYMS and | |
7322dca9 SW |
2841 | *OLOAD_CHAMP_BV. If NO_ADL, argument dependent lookup is not |
2842 | performned. */ | |
8d577d32 DC |
2843 | |
2844 | static int | |
da096638 | 2845 | find_oload_champ_namespace (struct value **args, int nargs, |
8d577d32 DC |
2846 | const char *func_name, |
2847 | const char *qualified_name, | |
2848 | struct symbol ***oload_syms, | |
7322dca9 SW |
2849 | struct badness_vector **oload_champ_bv, |
2850 | const int no_adl) | |
8d577d32 DC |
2851 | { |
2852 | int oload_champ; | |
2853 | ||
da096638 | 2854 | find_oload_champ_namespace_loop (args, nargs, |
8d577d32 DC |
2855 | func_name, |
2856 | qualified_name, 0, | |
2857 | oload_syms, oload_champ_bv, | |
7322dca9 SW |
2858 | &oload_champ, |
2859 | no_adl); | |
8d577d32 DC |
2860 | |
2861 | return oload_champ; | |
2862 | } | |
2863 | ||
2864 | /* Helper function for find_oload_champ_namespace; NAMESPACE_LEN is | |
2865 | how deep we've looked for namespaces, and the champ is stored in | |
2866 | OLOAD_CHAMP. The return value is 1 if the champ is a good one, 0 | |
7322dca9 SW |
2867 | if it isn't. Other arguments are the same as in |
2868 | find_oload_champ_namespace | |
8d577d32 DC |
2869 | |
2870 | It is the caller's responsibility to free *OLOAD_SYMS and | |
2871 | *OLOAD_CHAMP_BV. */ | |
2872 | ||
2873 | static int | |
da096638 | 2874 | find_oload_champ_namespace_loop (struct value **args, int nargs, |
8d577d32 DC |
2875 | const char *func_name, |
2876 | const char *qualified_name, | |
2877 | int namespace_len, | |
2878 | struct symbol ***oload_syms, | |
2879 | struct badness_vector **oload_champ_bv, | |
7322dca9 SW |
2880 | int *oload_champ, |
2881 | const int no_adl) | |
8d577d32 DC |
2882 | { |
2883 | int next_namespace_len = namespace_len; | |
2884 | int searched_deeper = 0; | |
2885 | int num_fns = 0; | |
2886 | struct cleanup *old_cleanups; | |
2887 | int new_oload_champ; | |
2888 | struct symbol **new_oload_syms; | |
2889 | struct badness_vector *new_oload_champ_bv; | |
2890 | char *new_namespace; | |
2891 | ||
2892 | if (next_namespace_len != 0) | |
2893 | { | |
2894 | gdb_assert (qualified_name[next_namespace_len] == ':'); | |
2895 | next_namespace_len += 2; | |
c906108c | 2896 | } |
ac3eeb49 MS |
2897 | next_namespace_len += |
2898 | cp_find_first_component (qualified_name + next_namespace_len); | |
8d577d32 DC |
2899 | |
2900 | /* Initialize these to values that can safely be xfree'd. */ | |
2901 | *oload_syms = NULL; | |
2902 | *oload_champ_bv = NULL; | |
c5aa993b | 2903 | |
581e13c1 | 2904 | /* First, see if we have a deeper namespace we can search in. |
ac3eeb49 | 2905 | If we get a good match there, use it. */ |
8d577d32 DC |
2906 | |
2907 | if (qualified_name[next_namespace_len] == ':') | |
2908 | { | |
2909 | searched_deeper = 1; | |
2910 | ||
da096638 | 2911 | if (find_oload_champ_namespace_loop (args, nargs, |
8d577d32 DC |
2912 | func_name, qualified_name, |
2913 | next_namespace_len, | |
2914 | oload_syms, oload_champ_bv, | |
7322dca9 | 2915 | oload_champ, no_adl)) |
8d577d32 DC |
2916 | { |
2917 | return 1; | |
2918 | } | |
2919 | }; | |
2920 | ||
2921 | /* If we reach here, either we're in the deepest namespace or we | |
2922 | didn't find a good match in a deeper namespace. But, in the | |
2923 | latter case, we still have a bad match in a deeper namespace; | |
2924 | note that we might not find any match at all in the current | |
2925 | namespace. (There's always a match in the deepest namespace, | |
2926 | because this overload mechanism only gets called if there's a | |
2927 | function symbol to start off with.) */ | |
2928 | ||
2929 | old_cleanups = make_cleanup (xfree, *oload_syms); | |
ec322823 | 2930 | make_cleanup (xfree, *oload_champ_bv); |
224c3ddb | 2931 | new_namespace = (char *) alloca (namespace_len + 1); |
8d577d32 DC |
2932 | strncpy (new_namespace, qualified_name, namespace_len); |
2933 | new_namespace[namespace_len] = '\0'; | |
2934 | new_oload_syms = make_symbol_overload_list (func_name, | |
2935 | new_namespace); | |
7322dca9 SW |
2936 | |
2937 | /* If we have reached the deepest level perform argument | |
2938 | determined lookup. */ | |
2939 | if (!searched_deeper && !no_adl) | |
da096638 KS |
2940 | { |
2941 | int ix; | |
2942 | struct type **arg_types; | |
2943 | ||
2944 | /* Prepare list of argument types for overload resolution. */ | |
2945 | arg_types = (struct type **) | |
2946 | alloca (nargs * (sizeof (struct type *))); | |
2947 | for (ix = 0; ix < nargs; ix++) | |
2948 | arg_types[ix] = value_type (args[ix]); | |
2949 | make_symbol_overload_list_adl (arg_types, nargs, func_name); | |
2950 | } | |
7322dca9 | 2951 | |
8d577d32 DC |
2952 | while (new_oload_syms[num_fns]) |
2953 | ++num_fns; | |
2954 | ||
9cf95373 | 2955 | new_oload_champ = find_oload_champ (args, nargs, num_fns, |
233e8b28 | 2956 | NULL, NULL, new_oload_syms, |
8d577d32 DC |
2957 | &new_oload_champ_bv); |
2958 | ||
2959 | /* Case 1: We found a good match. Free earlier matches (if any), | |
2960 | and return it. Case 2: We didn't find a good match, but we're | |
2961 | not the deepest function. Then go with the bad match that the | |
2962 | deeper function found. Case 3: We found a bad match, and we're | |
2963 | the deepest function. Then return what we found, even though | |
2964 | it's a bad match. */ | |
2965 | ||
2966 | if (new_oload_champ != -1 | |
2967 | && classify_oload_match (new_oload_champ_bv, nargs, 0) == STANDARD) | |
2968 | { | |
2969 | *oload_syms = new_oload_syms; | |
2970 | *oload_champ = new_oload_champ; | |
2971 | *oload_champ_bv = new_oload_champ_bv; | |
2972 | do_cleanups (old_cleanups); | |
2973 | return 1; | |
2974 | } | |
2975 | else if (searched_deeper) | |
2976 | { | |
2977 | xfree (new_oload_syms); | |
2978 | xfree (new_oload_champ_bv); | |
2979 | discard_cleanups (old_cleanups); | |
2980 | return 0; | |
2981 | } | |
2982 | else | |
2983 | { | |
8d577d32 DC |
2984 | *oload_syms = new_oload_syms; |
2985 | *oload_champ = new_oload_champ; | |
2986 | *oload_champ_bv = new_oload_champ_bv; | |
2a7d6a25 | 2987 | do_cleanups (old_cleanups); |
8d577d32 DC |
2988 | return 0; |
2989 | } | |
2990 | } | |
2991 | ||
da096638 | 2992 | /* Look for a function to take NARGS args of ARGS. Find |
8d577d32 | 2993 | the best match from among the overloaded methods or functions |
233e8b28 SC |
2994 | given by FNS_PTR or OLOAD_SYMS or XM_WORKER_VEC, respectively. |
2995 | One, and only one of FNS_PTR, OLOAD_SYMS and XM_WORKER_VEC can be | |
2996 | non-NULL. | |
2997 | ||
2998 | If XM_WORKER_VEC is NULL, then the length of the arrays FNS_PTR | |
2999 | or OLOAD_SYMS (whichever is non-NULL) is specified in NUM_FNS. | |
3000 | ||
8d577d32 DC |
3001 | Return the index of the best match; store an indication of the |
3002 | quality of the match in OLOAD_CHAMP_BV. | |
3003 | ||
3004 | It is the caller's responsibility to free *OLOAD_CHAMP_BV. */ | |
3005 | ||
3006 | static int | |
9cf95373 | 3007 | find_oload_champ (struct value **args, int nargs, |
8d577d32 | 3008 | int num_fns, struct fn_field *fns_ptr, |
233e8b28 | 3009 | VEC (xmethod_worker_ptr) *xm_worker_vec, |
8d577d32 DC |
3010 | struct symbol **oload_syms, |
3011 | struct badness_vector **oload_champ_bv) | |
3012 | { | |
3013 | int ix; | |
233e8b28 | 3014 | int fn_count; |
ac3eeb49 MS |
3015 | /* A measure of how good an overloaded instance is. */ |
3016 | struct badness_vector *bv; | |
3017 | /* Index of best overloaded function. */ | |
3018 | int oload_champ = -1; | |
3019 | /* Current ambiguity state for overload resolution. */ | |
3020 | int oload_ambiguous = 0; | |
3021 | /* 0 => no ambiguity, 1 => two good funcs, 2 => incomparable funcs. */ | |
8d577d32 | 3022 | |
9cf95373 | 3023 | /* A champion can be found among methods alone, or among functions |
233e8b28 SC |
3024 | alone, or in xmethods alone, but not in more than one of these |
3025 | groups. */ | |
3026 | gdb_assert ((fns_ptr != NULL) + (oload_syms != NULL) + (xm_worker_vec != NULL) | |
3027 | == 1); | |
9cf95373 | 3028 | |
8d577d32 | 3029 | *oload_champ_bv = NULL; |
c906108c | 3030 | |
233e8b28 SC |
3031 | fn_count = (xm_worker_vec != NULL |
3032 | ? VEC_length (xmethod_worker_ptr, xm_worker_vec) | |
3033 | : num_fns); | |
ac3eeb49 | 3034 | /* Consider each candidate in turn. */ |
233e8b28 | 3035 | for (ix = 0; ix < fn_count; ix++) |
c906108c | 3036 | { |
8d577d32 | 3037 | int jj; |
233e8b28 | 3038 | int static_offset = 0; |
8d577d32 DC |
3039 | int nparms; |
3040 | struct type **parm_types; | |
233e8b28 | 3041 | struct xmethod_worker *worker = NULL; |
8d577d32 | 3042 | |
233e8b28 | 3043 | if (xm_worker_vec != NULL) |
db577aea | 3044 | { |
233e8b28 SC |
3045 | worker = VEC_index (xmethod_worker_ptr, xm_worker_vec, ix); |
3046 | parm_types = get_xmethod_arg_types (worker, &nparms); | |
db577aea AC |
3047 | } |
3048 | else | |
3049 | { | |
233e8b28 SC |
3050 | if (fns_ptr != NULL) |
3051 | { | |
3052 | nparms = TYPE_NFIELDS (TYPE_FN_FIELD_TYPE (fns_ptr, ix)); | |
3053 | static_offset = oload_method_static_p (fns_ptr, ix); | |
3054 | } | |
3055 | else | |
3056 | nparms = TYPE_NFIELDS (SYMBOL_TYPE (oload_syms[ix])); | |
3057 | ||
8d749320 | 3058 | parm_types = XNEWVEC (struct type *, nparms); |
233e8b28 SC |
3059 | for (jj = 0; jj < nparms; jj++) |
3060 | parm_types[jj] = (fns_ptr != NULL | |
3061 | ? (TYPE_FN_FIELD_ARGS (fns_ptr, ix)[jj].type) | |
3062 | : TYPE_FIELD_TYPE (SYMBOL_TYPE (oload_syms[ix]), | |
8301c89e | 3063 | jj)); |
db577aea | 3064 | } |
c906108c | 3065 | |
ac3eeb49 MS |
3066 | /* Compare parameter types to supplied argument types. Skip |
3067 | THIS for static methods. */ | |
3068 | bv = rank_function (parm_types, nparms, | |
da096638 | 3069 | args + static_offset, |
4a1970e4 | 3070 | nargs - static_offset); |
c5aa993b | 3071 | |
8d577d32 | 3072 | if (!*oload_champ_bv) |
c5aa993b | 3073 | { |
8d577d32 | 3074 | *oload_champ_bv = bv; |
c5aa993b | 3075 | oload_champ = 0; |
c5aa993b | 3076 | } |
ac3eeb49 MS |
3077 | else /* See whether current candidate is better or worse than |
3078 | previous best. */ | |
8d577d32 | 3079 | switch (compare_badness (bv, *oload_champ_bv)) |
c5aa993b | 3080 | { |
ac3eeb49 MS |
3081 | case 0: /* Top two contenders are equally good. */ |
3082 | oload_ambiguous = 1; | |
c5aa993b | 3083 | break; |
ac3eeb49 MS |
3084 | case 1: /* Incomparable top contenders. */ |
3085 | oload_ambiguous = 2; | |
c5aa993b | 3086 | break; |
ac3eeb49 MS |
3087 | case 2: /* New champion, record details. */ |
3088 | *oload_champ_bv = bv; | |
c5aa993b JM |
3089 | oload_ambiguous = 0; |
3090 | oload_champ = ix; | |
c5aa993b JM |
3091 | break; |
3092 | case 3: | |
3093 | default: | |
3094 | break; | |
3095 | } | |
b8c9b27d | 3096 | xfree (parm_types); |
6b1ba9a0 ND |
3097 | if (overload_debug) |
3098 | { | |
233e8b28 | 3099 | if (fns_ptr != NULL) |
ac3eeb49 | 3100 | fprintf_filtered (gdb_stderr, |
3e43a32a | 3101 | "Overloaded method instance %s, # of parms %d\n", |
ac3eeb49 | 3102 | fns_ptr[ix].physname, nparms); |
233e8b28 SC |
3103 | else if (xm_worker_vec != NULL) |
3104 | fprintf_filtered (gdb_stderr, | |
3105 | "Xmethod worker, # of parms %d\n", | |
3106 | nparms); | |
6b1ba9a0 | 3107 | else |
ac3eeb49 | 3108 | fprintf_filtered (gdb_stderr, |
3e43a32a MS |
3109 | "Overloaded function instance " |
3110 | "%s # of parms %d\n", | |
ac3eeb49 MS |
3111 | SYMBOL_DEMANGLED_NAME (oload_syms[ix]), |
3112 | nparms); | |
4a1970e4 | 3113 | for (jj = 0; jj < nargs - static_offset; jj++) |
ac3eeb49 MS |
3114 | fprintf_filtered (gdb_stderr, |
3115 | "...Badness @ %d : %d\n", | |
6403aeea | 3116 | jj, bv->rank[jj].rank); |
3e43a32a MS |
3117 | fprintf_filtered (gdb_stderr, "Overload resolution " |
3118 | "champion is %d, ambiguous? %d\n", | |
ac3eeb49 | 3119 | oload_champ, oload_ambiguous); |
6b1ba9a0 | 3120 | } |
c906108c SS |
3121 | } |
3122 | ||
8d577d32 DC |
3123 | return oload_champ; |
3124 | } | |
6b1ba9a0 | 3125 | |
8d577d32 DC |
3126 | /* Return 1 if we're looking at a static method, 0 if we're looking at |
3127 | a non-static method or a function that isn't a method. */ | |
c906108c | 3128 | |
8d577d32 | 3129 | static int |
2bca57ba | 3130 | oload_method_static_p (struct fn_field *fns_ptr, int index) |
8d577d32 | 3131 | { |
2bca57ba | 3132 | if (fns_ptr && index >= 0 && TYPE_FN_FIELD_STATIC_P (fns_ptr, index)) |
8d577d32 | 3133 | return 1; |
c906108c | 3134 | else |
8d577d32 DC |
3135 | return 0; |
3136 | } | |
c906108c | 3137 | |
8d577d32 DC |
3138 | /* Check how good an overload match OLOAD_CHAMP_BV represents. */ |
3139 | ||
3140 | static enum oload_classification | |
3141 | classify_oload_match (struct badness_vector *oload_champ_bv, | |
3142 | int nargs, | |
3143 | int static_offset) | |
3144 | { | |
3145 | int ix; | |
da096638 | 3146 | enum oload_classification worst = STANDARD; |
8d577d32 DC |
3147 | |
3148 | for (ix = 1; ix <= nargs - static_offset; ix++) | |
7f8c9282 | 3149 | { |
6403aeea SW |
3150 | /* If this conversion is as bad as INCOMPATIBLE_TYPE_BADNESS |
3151 | or worse return INCOMPATIBLE. */ | |
3152 | if (compare_ranks (oload_champ_bv->rank[ix], | |
3153 | INCOMPATIBLE_TYPE_BADNESS) <= 0) | |
ac3eeb49 | 3154 | return INCOMPATIBLE; /* Truly mismatched types. */ |
6403aeea SW |
3155 | /* Otherwise If this conversion is as bad as |
3156 | NS_POINTER_CONVERSION_BADNESS or worse return NON_STANDARD. */ | |
3157 | else if (compare_ranks (oload_champ_bv->rank[ix], | |
3158 | NS_POINTER_CONVERSION_BADNESS) <= 0) | |
da096638 | 3159 | worst = NON_STANDARD; /* Non-standard type conversions |
ac3eeb49 | 3160 | needed. */ |
7f8c9282 | 3161 | } |
02f0d45d | 3162 | |
da096638 KS |
3163 | /* If no INCOMPATIBLE classification was found, return the worst one |
3164 | that was found (if any). */ | |
3165 | return worst; | |
c906108c SS |
3166 | } |
3167 | ||
ac3eeb49 MS |
3168 | /* C++: return 1 is NAME is a legitimate name for the destructor of |
3169 | type TYPE. If TYPE does not have a destructor, or if NAME is | |
d8228535 JK |
3170 | inappropriate for TYPE, an error is signaled. Parameter TYPE should not yet |
3171 | have CHECK_TYPEDEF applied, this function will apply it itself. */ | |
3172 | ||
c906108c | 3173 | int |
d8228535 | 3174 | destructor_name_p (const char *name, struct type *type) |
c906108c | 3175 | { |
c906108c SS |
3176 | if (name[0] == '~') |
3177 | { | |
d8228535 JK |
3178 | const char *dname = type_name_no_tag_or_error (type); |
3179 | const char *cp = strchr (dname, '<'); | |
c906108c SS |
3180 | unsigned int len; |
3181 | ||
3182 | /* Do not compare the template part for template classes. */ | |
3183 | if (cp == NULL) | |
3184 | len = strlen (dname); | |
3185 | else | |
3186 | len = cp - dname; | |
bf896cb0 | 3187 | if (strlen (name + 1) != len || strncmp (dname, name + 1, len) != 0) |
8a3fe4f8 | 3188 | error (_("name of destructor must equal name of class")); |
c906108c SS |
3189 | else |
3190 | return 1; | |
3191 | } | |
3192 | return 0; | |
3193 | } | |
3194 | ||
3d567982 TT |
3195 | /* Find an enum constant named NAME in TYPE. TYPE must be an "enum |
3196 | class". If the name is found, return a value representing it; | |
3197 | otherwise throw an exception. */ | |
3198 | ||
3199 | static struct value * | |
3200 | enum_constant_from_type (struct type *type, const char *name) | |
3201 | { | |
3202 | int i; | |
3203 | int name_len = strlen (name); | |
3204 | ||
3205 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_ENUM | |
3206 | && TYPE_DECLARED_CLASS (type)); | |
3207 | ||
3208 | for (i = TYPE_N_BASECLASSES (type); i < TYPE_NFIELDS (type); ++i) | |
3209 | { | |
3210 | const char *fname = TYPE_FIELD_NAME (type, i); | |
3211 | int len; | |
3212 | ||
3213 | if (TYPE_FIELD_LOC_KIND (type, i) != FIELD_LOC_KIND_ENUMVAL | |
3214 | || fname == NULL) | |
3215 | continue; | |
3216 | ||
3217 | /* Look for the trailing "::NAME", since enum class constant | |
3218 | names are qualified here. */ | |
3219 | len = strlen (fname); | |
3220 | if (len + 2 >= name_len | |
3221 | && fname[len - name_len - 2] == ':' | |
3222 | && fname[len - name_len - 1] == ':' | |
3223 | && strcmp (&fname[len - name_len], name) == 0) | |
3224 | return value_from_longest (type, TYPE_FIELD_ENUMVAL (type, i)); | |
3225 | } | |
3226 | ||
3227 | error (_("no constant named \"%s\" in enum \"%s\""), | |
3228 | name, TYPE_TAG_NAME (type)); | |
3229 | } | |
3230 | ||
79c2c32d | 3231 | /* C++: Given an aggregate type CURTYPE, and a member name NAME, |
0d5de010 DJ |
3232 | return the appropriate member (or the address of the member, if |
3233 | WANT_ADDRESS). This function is used to resolve user expressions | |
3234 | of the form "DOMAIN::NAME". For more details on what happens, see | |
3235 | the comment before value_struct_elt_for_reference. */ | |
79c2c32d DC |
3236 | |
3237 | struct value * | |
c848d642 | 3238 | value_aggregate_elt (struct type *curtype, const char *name, |
072bba3b | 3239 | struct type *expect_type, int want_address, |
79c2c32d DC |
3240 | enum noside noside) |
3241 | { | |
3242 | switch (TYPE_CODE (curtype)) | |
3243 | { | |
3244 | case TYPE_CODE_STRUCT: | |
3245 | case TYPE_CODE_UNION: | |
ac3eeb49 | 3246 | return value_struct_elt_for_reference (curtype, 0, curtype, |
072bba3b | 3247 | name, expect_type, |
0d5de010 | 3248 | want_address, noside); |
79c2c32d | 3249 | case TYPE_CODE_NAMESPACE: |
ac3eeb49 MS |
3250 | return value_namespace_elt (curtype, name, |
3251 | want_address, noside); | |
3d567982 TT |
3252 | |
3253 | case TYPE_CODE_ENUM: | |
3254 | return enum_constant_from_type (curtype, name); | |
3255 | ||
79c2c32d DC |
3256 | default: |
3257 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 3258 | _("non-aggregate type in value_aggregate_elt")); |
79c2c32d DC |
3259 | } |
3260 | } | |
3261 | ||
072bba3b | 3262 | /* Compares the two method/function types T1 and T2 for "equality" |
b021a221 | 3263 | with respect to the methods' parameters. If the types of the |
072bba3b KS |
3264 | two parameter lists are the same, returns 1; 0 otherwise. This |
3265 | comparison may ignore any artificial parameters in T1 if | |
3266 | SKIP_ARTIFICIAL is non-zero. This function will ALWAYS skip | |
3267 | the first artificial parameter in T1, assumed to be a 'this' pointer. | |
3268 | ||
3269 | The type T2 is expected to have come from make_params (in eval.c). */ | |
3270 | ||
3271 | static int | |
3272 | compare_parameters (struct type *t1, struct type *t2, int skip_artificial) | |
3273 | { | |
3274 | int start = 0; | |
3275 | ||
80b23b6a | 3276 | if (TYPE_NFIELDS (t1) > 0 && TYPE_FIELD_ARTIFICIAL (t1, 0)) |
072bba3b KS |
3277 | ++start; |
3278 | ||
3279 | /* If skipping artificial fields, find the first real field | |
581e13c1 | 3280 | in T1. */ |
072bba3b KS |
3281 | if (skip_artificial) |
3282 | { | |
3283 | while (start < TYPE_NFIELDS (t1) | |
3284 | && TYPE_FIELD_ARTIFICIAL (t1, start)) | |
3285 | ++start; | |
3286 | } | |
3287 | ||
581e13c1 | 3288 | /* Now compare parameters. */ |
072bba3b KS |
3289 | |
3290 | /* Special case: a method taking void. T1 will contain no | |
3291 | non-artificial fields, and T2 will contain TYPE_CODE_VOID. */ | |
3292 | if ((TYPE_NFIELDS (t1) - start) == 0 && TYPE_NFIELDS (t2) == 1 | |
3293 | && TYPE_CODE (TYPE_FIELD_TYPE (t2, 0)) == TYPE_CODE_VOID) | |
3294 | return 1; | |
3295 | ||
3296 | if ((TYPE_NFIELDS (t1) - start) == TYPE_NFIELDS (t2)) | |
3297 | { | |
3298 | int i; | |
a109c7c1 | 3299 | |
072bba3b KS |
3300 | for (i = 0; i < TYPE_NFIELDS (t2); ++i) |
3301 | { | |
6403aeea | 3302 | if (compare_ranks (rank_one_type (TYPE_FIELD_TYPE (t1, start + i), |
da096638 | 3303 | TYPE_FIELD_TYPE (t2, i), NULL), |
6403aeea | 3304 | EXACT_MATCH_BADNESS) != 0) |
072bba3b KS |
3305 | return 0; |
3306 | } | |
3307 | ||
3308 | return 1; | |
3309 | } | |
3310 | ||
3311 | return 0; | |
3312 | } | |
3313 | ||
c906108c | 3314 | /* C++: Given an aggregate type CURTYPE, and a member name NAME, |
ac3eeb49 MS |
3315 | return the address of this member as a "pointer to member" type. |
3316 | If INTYPE is non-null, then it will be the type of the member we | |
3317 | are looking for. This will help us resolve "pointers to member | |
3318 | functions". This function is used to resolve user expressions of | |
3319 | the form "DOMAIN::NAME". */ | |
c906108c | 3320 | |
63d06c5c | 3321 | static struct value * |
fba45db2 | 3322 | value_struct_elt_for_reference (struct type *domain, int offset, |
c848d642 | 3323 | struct type *curtype, const char *name, |
ac3eeb49 MS |
3324 | struct type *intype, |
3325 | int want_address, | |
63d06c5c | 3326 | enum noside noside) |
c906108c | 3327 | { |
52f0bd74 AC |
3328 | struct type *t = curtype; |
3329 | int i; | |
0d5de010 | 3330 | struct value *v, *result; |
c906108c | 3331 | |
c5aa993b | 3332 | if (TYPE_CODE (t) != TYPE_CODE_STRUCT |
c906108c | 3333 | && TYPE_CODE (t) != TYPE_CODE_UNION) |
3e43a32a MS |
3334 | error (_("Internal error: non-aggregate type " |
3335 | "to value_struct_elt_for_reference")); | |
c906108c SS |
3336 | |
3337 | for (i = TYPE_NFIELDS (t) - 1; i >= TYPE_N_BASECLASSES (t); i--) | |
3338 | { | |
0d5cff50 | 3339 | const char *t_field_name = TYPE_FIELD_NAME (t, i); |
c5aa993b | 3340 | |
6314a349 | 3341 | if (t_field_name && strcmp (t_field_name, name) == 0) |
c906108c | 3342 | { |
d6a843b5 | 3343 | if (field_is_static (&TYPE_FIELD (t, i))) |
c906108c SS |
3344 | { |
3345 | v = value_static_field (t, i); | |
0d5de010 DJ |
3346 | if (want_address) |
3347 | v = value_addr (v); | |
c906108c SS |
3348 | return v; |
3349 | } | |
3350 | if (TYPE_FIELD_PACKED (t, i)) | |
8a3fe4f8 | 3351 | error (_("pointers to bitfield members not allowed")); |
c5aa993b | 3352 | |
0d5de010 DJ |
3353 | if (want_address) |
3354 | return value_from_longest | |
3355 | (lookup_memberptr_type (TYPE_FIELD_TYPE (t, i), domain), | |
3356 | offset + (LONGEST) (TYPE_FIELD_BITPOS (t, i) >> 3)); | |
f7e3ecae | 3357 | else if (noside != EVAL_NORMAL) |
0d5de010 DJ |
3358 | return allocate_value (TYPE_FIELD_TYPE (t, i)); |
3359 | else | |
f7e3ecae KS |
3360 | { |
3361 | /* Try to evaluate NAME as a qualified name with implicit | |
3362 | this pointer. In this case, attempt to return the | |
3363 | equivalent to `this->*(&TYPE::NAME)'. */ | |
3364 | v = value_of_this_silent (current_language); | |
3365 | if (v != NULL) | |
3366 | { | |
3367 | struct value *ptr; | |
3368 | long mem_offset; | |
3369 | struct type *type, *tmp; | |
3370 | ||
3371 | ptr = value_aggregate_elt (domain, name, NULL, 1, noside); | |
3372 | type = check_typedef (value_type (ptr)); | |
3373 | gdb_assert (type != NULL | |
3374 | && TYPE_CODE (type) == TYPE_CODE_MEMBERPTR); | |
4bfb94b8 | 3375 | tmp = lookup_pointer_type (TYPE_SELF_TYPE (type)); |
f7e3ecae KS |
3376 | v = value_cast_pointers (tmp, v, 1); |
3377 | mem_offset = value_as_long (ptr); | |
3378 | tmp = lookup_pointer_type (TYPE_TARGET_TYPE (type)); | |
3379 | result = value_from_pointer (tmp, | |
3380 | value_as_long (v) + mem_offset); | |
3381 | return value_ind (result); | |
3382 | } | |
3383 | ||
3384 | error (_("Cannot reference non-static field \"%s\""), name); | |
3385 | } | |
c906108c SS |
3386 | } |
3387 | } | |
3388 | ||
ac3eeb49 MS |
3389 | /* C++: If it was not found as a data field, then try to return it |
3390 | as a pointer to a method. */ | |
c906108c | 3391 | |
c906108c SS |
3392 | /* Perform all necessary dereferencing. */ |
3393 | while (intype && TYPE_CODE (intype) == TYPE_CODE_PTR) | |
3394 | intype = TYPE_TARGET_TYPE (intype); | |
3395 | ||
3396 | for (i = TYPE_NFN_FIELDS (t) - 1; i >= 0; --i) | |
3397 | { | |
0d5cff50 | 3398 | const char *t_field_name = TYPE_FN_FIELDLIST_NAME (t, i); |
c906108c SS |
3399 | char dem_opname[64]; |
3400 | ||
61012eef GB |
3401 | if (startswith (t_field_name, "__") |
3402 | || startswith (t_field_name, "op") | |
3403 | || startswith (t_field_name, "type")) | |
c906108c | 3404 | { |
ac3eeb49 MS |
3405 | if (cplus_demangle_opname (t_field_name, |
3406 | dem_opname, DMGL_ANSI)) | |
c5aa993b | 3407 | t_field_name = dem_opname; |
ac3eeb49 MS |
3408 | else if (cplus_demangle_opname (t_field_name, |
3409 | dem_opname, 0)) | |
c906108c | 3410 | t_field_name = dem_opname; |
c906108c | 3411 | } |
6314a349 | 3412 | if (t_field_name && strcmp (t_field_name, name) == 0) |
c906108c | 3413 | { |
072bba3b KS |
3414 | int j; |
3415 | int len = TYPE_FN_FIELDLIST_LENGTH (t, i); | |
c906108c | 3416 | struct fn_field *f = TYPE_FN_FIELDLIST1 (t, i); |
c5aa993b | 3417 | |
de17c821 DJ |
3418 | check_stub_method_group (t, i); |
3419 | ||
c906108c SS |
3420 | if (intype) |
3421 | { | |
072bba3b KS |
3422 | for (j = 0; j < len; ++j) |
3423 | { | |
3424 | if (compare_parameters (TYPE_FN_FIELD_TYPE (f, j), intype, 0) | |
3e43a32a MS |
3425 | || compare_parameters (TYPE_FN_FIELD_TYPE (f, j), |
3426 | intype, 1)) | |
072bba3b KS |
3427 | break; |
3428 | } | |
3429 | ||
3430 | if (j == len) | |
3e43a32a MS |
3431 | error (_("no member function matches " |
3432 | "that type instantiation")); | |
7f79b1c5 | 3433 | } |
c906108c | 3434 | else |
072bba3b KS |
3435 | { |
3436 | int ii; | |
7f79b1c5 DJ |
3437 | |
3438 | j = -1; | |
53832f31 | 3439 | for (ii = 0; ii < len; ++ii) |
072bba3b | 3440 | { |
7f79b1c5 DJ |
3441 | /* Skip artificial methods. This is necessary if, |
3442 | for example, the user wants to "print | |
3443 | subclass::subclass" with only one user-defined | |
53832f31 TT |
3444 | constructor. There is no ambiguity in this case. |
3445 | We are careful here to allow artificial methods | |
3446 | if they are the unique result. */ | |
072bba3b | 3447 | if (TYPE_FN_FIELD_ARTIFICIAL (f, ii)) |
53832f31 TT |
3448 | { |
3449 | if (j == -1) | |
3450 | j = ii; | |
3451 | continue; | |
3452 | } | |
072bba3b | 3453 | |
7f79b1c5 DJ |
3454 | /* Desired method is ambiguous if more than one |
3455 | method is defined. */ | |
53832f31 | 3456 | if (j != -1 && !TYPE_FN_FIELD_ARTIFICIAL (f, j)) |
3e43a32a MS |
3457 | error (_("non-unique member `%s' requires " |
3458 | "type instantiation"), name); | |
072bba3b | 3459 | |
7f79b1c5 DJ |
3460 | j = ii; |
3461 | } | |
53832f31 TT |
3462 | |
3463 | if (j == -1) | |
3464 | error (_("no matching member function")); | |
072bba3b | 3465 | } |
c5aa993b | 3466 | |
0d5de010 DJ |
3467 | if (TYPE_FN_FIELD_STATIC_P (f, j)) |
3468 | { | |
ac3eeb49 MS |
3469 | struct symbol *s = |
3470 | lookup_symbol (TYPE_FN_FIELD_PHYSNAME (f, j), | |
d12307c1 | 3471 | 0, VAR_DOMAIN, 0).symbol; |
a109c7c1 | 3472 | |
0d5de010 DJ |
3473 | if (s == NULL) |
3474 | return NULL; | |
3475 | ||
3476 | if (want_address) | |
63e43d3a | 3477 | return value_addr (read_var_value (s, 0, 0)); |
0d5de010 | 3478 | else |
63e43d3a | 3479 | return read_var_value (s, 0, 0); |
0d5de010 DJ |
3480 | } |
3481 | ||
c906108c SS |
3482 | if (TYPE_FN_FIELD_VIRTUAL_P (f, j)) |
3483 | { | |
0d5de010 DJ |
3484 | if (want_address) |
3485 | { | |
3486 | result = allocate_value | |
3487 | (lookup_methodptr_type (TYPE_FN_FIELD_TYPE (f, j))); | |
ad4820ab UW |
3488 | cplus_make_method_ptr (value_type (result), |
3489 | value_contents_writeable (result), | |
0d5de010 DJ |
3490 | TYPE_FN_FIELD_VOFFSET (f, j), 1); |
3491 | } | |
3492 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
3493 | return allocate_value (TYPE_FN_FIELD_TYPE (f, j)); | |
3494 | else | |
3495 | error (_("Cannot reference virtual member function \"%s\""), | |
3496 | name); | |
c906108c SS |
3497 | } |
3498 | else | |
3499 | { | |
ac3eeb49 MS |
3500 | struct symbol *s = |
3501 | lookup_symbol (TYPE_FN_FIELD_PHYSNAME (f, j), | |
d12307c1 | 3502 | 0, VAR_DOMAIN, 0).symbol; |
a109c7c1 | 3503 | |
c906108c | 3504 | if (s == NULL) |
0d5de010 DJ |
3505 | return NULL; |
3506 | ||
63e43d3a | 3507 | v = read_var_value (s, 0, 0); |
0d5de010 DJ |
3508 | if (!want_address) |
3509 | result = v; | |
c906108c SS |
3510 | else |
3511 | { | |
0d5de010 | 3512 | result = allocate_value (lookup_methodptr_type (TYPE_FN_FIELD_TYPE (f, j))); |
ad4820ab UW |
3513 | cplus_make_method_ptr (value_type (result), |
3514 | value_contents_writeable (result), | |
42ae5230 | 3515 | value_address (v), 0); |
c906108c | 3516 | } |
c906108c | 3517 | } |
0d5de010 | 3518 | return result; |
c906108c SS |
3519 | } |
3520 | } | |
3521 | for (i = TYPE_N_BASECLASSES (t) - 1; i >= 0; i--) | |
3522 | { | |
f23631e4 | 3523 | struct value *v; |
c906108c SS |
3524 | int base_offset; |
3525 | ||
3526 | if (BASETYPE_VIA_VIRTUAL (t, i)) | |
3527 | base_offset = 0; | |
3528 | else | |
3529 | base_offset = TYPE_BASECLASS_BITPOS (t, i) / 8; | |
3530 | v = value_struct_elt_for_reference (domain, | |
3531 | offset + base_offset, | |
3532 | TYPE_BASECLASS (t, i), | |
ac3eeb49 MS |
3533 | name, intype, |
3534 | want_address, noside); | |
c906108c SS |
3535 | if (v) |
3536 | return v; | |
3537 | } | |
63d06c5c DC |
3538 | |
3539 | /* As a last chance, pretend that CURTYPE is a namespace, and look | |
3540 | it up that way; this (frequently) works for types nested inside | |
3541 | classes. */ | |
3542 | ||
ac3eeb49 MS |
3543 | return value_maybe_namespace_elt (curtype, name, |
3544 | want_address, noside); | |
c906108c SS |
3545 | } |
3546 | ||
79c2c32d DC |
3547 | /* C++: Return the member NAME of the namespace given by the type |
3548 | CURTYPE. */ | |
3549 | ||
3550 | static struct value * | |
3551 | value_namespace_elt (const struct type *curtype, | |
c848d642 | 3552 | const char *name, int want_address, |
79c2c32d | 3553 | enum noside noside) |
63d06c5c DC |
3554 | { |
3555 | struct value *retval = value_maybe_namespace_elt (curtype, name, | |
ac3eeb49 MS |
3556 | want_address, |
3557 | noside); | |
63d06c5c DC |
3558 | |
3559 | if (retval == NULL) | |
ac3eeb49 MS |
3560 | error (_("No symbol \"%s\" in namespace \"%s\"."), |
3561 | name, TYPE_TAG_NAME (curtype)); | |
63d06c5c DC |
3562 | |
3563 | return retval; | |
3564 | } | |
3565 | ||
3566 | /* A helper function used by value_namespace_elt and | |
3567 | value_struct_elt_for_reference. It looks up NAME inside the | |
3568 | context CURTYPE; this works if CURTYPE is a namespace or if CURTYPE | |
3569 | is a class and NAME refers to a type in CURTYPE itself (as opposed | |
3570 | to, say, some base class of CURTYPE). */ | |
3571 | ||
3572 | static struct value * | |
3573 | value_maybe_namespace_elt (const struct type *curtype, | |
c848d642 | 3574 | const char *name, int want_address, |
63d06c5c | 3575 | enum noside noside) |
79c2c32d DC |
3576 | { |
3577 | const char *namespace_name = TYPE_TAG_NAME (curtype); | |
d12307c1 | 3578 | struct block_symbol sym; |
0d5de010 | 3579 | struct value *result; |
79c2c32d | 3580 | |
13387711 | 3581 | sym = cp_lookup_symbol_namespace (namespace_name, name, |
41f62f39 JK |
3582 | get_selected_block (0), VAR_DOMAIN); |
3583 | ||
d12307c1 | 3584 | if (sym.symbol == NULL) |
63d06c5c | 3585 | return NULL; |
79c2c32d | 3586 | else if ((noside == EVAL_AVOID_SIDE_EFFECTS) |
d12307c1 PMR |
3587 | && (SYMBOL_CLASS (sym.symbol) == LOC_TYPEDEF)) |
3588 | result = allocate_value (SYMBOL_TYPE (sym.symbol)); | |
79c2c32d | 3589 | else |
d12307c1 | 3590 | result = value_of_variable (sym.symbol, sym.block); |
0d5de010 | 3591 | |
ae6a105d | 3592 | if (want_address) |
0d5de010 DJ |
3593 | result = value_addr (result); |
3594 | ||
3595 | return result; | |
79c2c32d DC |
3596 | } |
3597 | ||
dfcee124 | 3598 | /* Given a pointer or a reference value V, find its real (RTTI) type. |
ac3eeb49 | 3599 | |
c906108c | 3600 | Other parameters FULL, TOP, USING_ENC as with value_rtti_type() |
ac3eeb49 | 3601 | and refer to the values computed for the object pointed to. */ |
c906108c SS |
3602 | |
3603 | struct type * | |
dfcee124 | 3604 | value_rtti_indirect_type (struct value *v, int *full, |
6b850546 | 3605 | LONGEST *top, int *using_enc) |
c906108c | 3606 | { |
f7e5394d | 3607 | struct value *target = NULL; |
dfcee124 AG |
3608 | struct type *type, *real_type, *target_type; |
3609 | ||
3610 | type = value_type (v); | |
3611 | type = check_typedef (type); | |
aa006118 | 3612 | if (TYPE_IS_REFERENCE (type)) |
dfcee124 AG |
3613 | target = coerce_ref (v); |
3614 | else if (TYPE_CODE (type) == TYPE_CODE_PTR) | |
f7e5394d | 3615 | { |
f7e5394d | 3616 | |
492d29ea | 3617 | TRY |
f7e5394d SM |
3618 | { |
3619 | target = value_ind (v); | |
3620 | } | |
492d29ea | 3621 | CATCH (except, RETURN_MASK_ERROR) |
f7e5394d SM |
3622 | { |
3623 | if (except.error == MEMORY_ERROR) | |
3624 | { | |
3625 | /* value_ind threw a memory error. The pointer is NULL or | |
3626 | contains an uninitialized value: we can't determine any | |
3627 | type. */ | |
3628 | return NULL; | |
3629 | } | |
3630 | throw_exception (except); | |
3631 | } | |
492d29ea | 3632 | END_CATCH |
f7e5394d | 3633 | } |
dfcee124 AG |
3634 | else |
3635 | return NULL; | |
c906108c | 3636 | |
dfcee124 AG |
3637 | real_type = value_rtti_type (target, full, top, using_enc); |
3638 | ||
3639 | if (real_type) | |
3640 | { | |
3641 | /* Copy qualifiers to the referenced object. */ | |
3642 | target_type = value_type (target); | |
3643 | real_type = make_cv_type (TYPE_CONST (target_type), | |
3644 | TYPE_VOLATILE (target_type), real_type, NULL); | |
aa006118 AV |
3645 | if (TYPE_IS_REFERENCE (type)) |
3646 | real_type = lookup_reference_type (real_type, TYPE_CODE (type)); | |
dfcee124 AG |
3647 | else if (TYPE_CODE (type) == TYPE_CODE_PTR) |
3648 | real_type = lookup_pointer_type (real_type); | |
3649 | else | |
3650 | internal_error (__FILE__, __LINE__, _("Unexpected value type.")); | |
3651 | ||
3652 | /* Copy qualifiers to the pointer/reference. */ | |
3653 | real_type = make_cv_type (TYPE_CONST (type), TYPE_VOLATILE (type), | |
3654 | real_type, NULL); | |
3655 | } | |
c906108c | 3656 | |
dfcee124 | 3657 | return real_type; |
c906108c SS |
3658 | } |
3659 | ||
3660 | /* Given a value pointed to by ARGP, check its real run-time type, and | |
3661 | if that is different from the enclosing type, create a new value | |
3662 | using the real run-time type as the enclosing type (and of the same | |
3663 | type as ARGP) and return it, with the embedded offset adjusted to | |
ac3eeb49 MS |
3664 | be the correct offset to the enclosed object. RTYPE is the type, |
3665 | and XFULL, XTOP, and XUSING_ENC are the other parameters, computed | |
3666 | by value_rtti_type(). If these are available, they can be supplied | |
3667 | and a second call to value_rtti_type() is avoided. (Pass RTYPE == | |
3668 | NULL if they're not available. */ | |
c906108c | 3669 | |
f23631e4 | 3670 | struct value * |
ac3eeb49 MS |
3671 | value_full_object (struct value *argp, |
3672 | struct type *rtype, | |
3673 | int xfull, int xtop, | |
fba45db2 | 3674 | int xusing_enc) |
c906108c | 3675 | { |
c5aa993b | 3676 | struct type *real_type; |
c906108c | 3677 | int full = 0; |
6b850546 | 3678 | LONGEST top = -1; |
c906108c | 3679 | int using_enc = 0; |
f23631e4 | 3680 | struct value *new_val; |
c906108c SS |
3681 | |
3682 | if (rtype) | |
3683 | { | |
3684 | real_type = rtype; | |
3685 | full = xfull; | |
3686 | top = xtop; | |
3687 | using_enc = xusing_enc; | |
3688 | } | |
3689 | else | |
3690 | real_type = value_rtti_type (argp, &full, &top, &using_enc); | |
3691 | ||
ac3eeb49 | 3692 | /* If no RTTI data, or if object is already complete, do nothing. */ |
4754a64e | 3693 | if (!real_type || real_type == value_enclosing_type (argp)) |
c906108c SS |
3694 | return argp; |
3695 | ||
a7860e76 TT |
3696 | /* In a destructor we might see a real type that is a superclass of |
3697 | the object's type. In this case it is better to leave the object | |
3698 | as-is. */ | |
3699 | if (full | |
3700 | && TYPE_LENGTH (real_type) < TYPE_LENGTH (value_enclosing_type (argp))) | |
3701 | return argp; | |
3702 | ||
c906108c | 3703 | /* If we have the full object, but for some reason the enclosing |
ac3eeb49 MS |
3704 | type is wrong, set it. */ |
3705 | /* pai: FIXME -- sounds iffy */ | |
c906108c SS |
3706 | if (full) |
3707 | { | |
4dfea560 DE |
3708 | argp = value_copy (argp); |
3709 | set_value_enclosing_type (argp, real_type); | |
c906108c SS |
3710 | return argp; |
3711 | } | |
3712 | ||
581e13c1 | 3713 | /* Check if object is in memory. */ |
c906108c SS |
3714 | if (VALUE_LVAL (argp) != lval_memory) |
3715 | { | |
3e43a32a MS |
3716 | warning (_("Couldn't retrieve complete object of RTTI " |
3717 | "type %s; object may be in register(s)."), | |
ac3eeb49 | 3718 | TYPE_NAME (real_type)); |
c5aa993b | 3719 | |
c906108c SS |
3720 | return argp; |
3721 | } | |
c5aa993b | 3722 | |
ac3eeb49 MS |
3723 | /* All other cases -- retrieve the complete object. */ |
3724 | /* Go back by the computed top_offset from the beginning of the | |
3725 | object, adjusting for the embedded offset of argp if that's what | |
3726 | value_rtti_type used for its computation. */ | |
42ae5230 | 3727 | new_val = value_at_lazy (real_type, value_address (argp) - top + |
13c3b5f5 | 3728 | (using_enc ? 0 : value_embedded_offset (argp))); |
04624583 | 3729 | deprecated_set_value_type (new_val, value_type (argp)); |
13c3b5f5 AC |
3730 | set_value_embedded_offset (new_val, (using_enc |
3731 | ? top + value_embedded_offset (argp) | |
3732 | : top)); | |
c906108c SS |
3733 | return new_val; |
3734 | } | |
3735 | ||
389e51db | 3736 | |
85bc8cb7 JK |
3737 | /* Return the value of the local variable, if one exists. Throw error |
3738 | otherwise, such as if the request is made in an inappropriate context. */ | |
c906108c | 3739 | |
f23631e4 | 3740 | struct value * |
85bc8cb7 | 3741 | value_of_this (const struct language_defn *lang) |
c906108c | 3742 | { |
63e43d3a | 3743 | struct block_symbol sym; |
3977b71f | 3744 | const struct block *b; |
206415a3 | 3745 | struct frame_info *frame; |
c906108c | 3746 | |
66a17cb6 | 3747 | if (!lang->la_name_of_this) |
85bc8cb7 | 3748 | error (_("no `this' in current language")); |
aee28ec6 | 3749 | |
85bc8cb7 | 3750 | frame = get_selected_frame (_("no frame selected")); |
c906108c | 3751 | |
66a17cb6 | 3752 | b = get_frame_block (frame, NULL); |
c906108c | 3753 | |
63e43d3a PMR |
3754 | sym = lookup_language_this (lang, b); |
3755 | if (sym.symbol == NULL) | |
85bc8cb7 JK |
3756 | error (_("current stack frame does not contain a variable named `%s'"), |
3757 | lang->la_name_of_this); | |
3758 | ||
63e43d3a | 3759 | return read_var_value (sym.symbol, sym.block, frame); |
85bc8cb7 JK |
3760 | } |
3761 | ||
3762 | /* Return the value of the local variable, if one exists. Return NULL | |
3763 | otherwise. Never throw error. */ | |
3764 | ||
3765 | struct value * | |
3766 | value_of_this_silent (const struct language_defn *lang) | |
3767 | { | |
3768 | struct value *ret = NULL; | |
85bc8cb7 | 3769 | |
492d29ea | 3770 | TRY |
c906108c | 3771 | { |
85bc8cb7 | 3772 | ret = value_of_this (lang); |
c906108c | 3773 | } |
492d29ea PA |
3774 | CATCH (except, RETURN_MASK_ERROR) |
3775 | { | |
3776 | } | |
3777 | END_CATCH | |
c906108c | 3778 | |
d069f99d AF |
3779 | return ret; |
3780 | } | |
3781 | ||
ac3eeb49 MS |
3782 | /* Create a slice (sub-string, sub-array) of ARRAY, that is LENGTH |
3783 | elements long, starting at LOWBOUND. The result has the same lower | |
3784 | bound as the original ARRAY. */ | |
c906108c | 3785 | |
f23631e4 AC |
3786 | struct value * |
3787 | value_slice (struct value *array, int lowbound, int length) | |
c906108c SS |
3788 | { |
3789 | struct type *slice_range_type, *slice_type, *range_type; | |
7a67d0fe | 3790 | LONGEST lowerbound, upperbound; |
f23631e4 | 3791 | struct value *slice; |
c906108c | 3792 | struct type *array_type; |
ac3eeb49 | 3793 | |
df407dfe | 3794 | array_type = check_typedef (value_type (array)); |
c906108c | 3795 | if (TYPE_CODE (array_type) != TYPE_CODE_ARRAY |
6b1755ce | 3796 | && TYPE_CODE (array_type) != TYPE_CODE_STRING) |
8a3fe4f8 | 3797 | error (_("cannot take slice of non-array")); |
ac3eeb49 | 3798 | |
c906108c SS |
3799 | range_type = TYPE_INDEX_TYPE (array_type); |
3800 | if (get_discrete_bounds (range_type, &lowerbound, &upperbound) < 0) | |
8a3fe4f8 | 3801 | error (_("slice from bad array or bitstring")); |
ac3eeb49 | 3802 | |
c906108c | 3803 | if (lowbound < lowerbound || length < 0 |
db034ac5 | 3804 | || lowbound + length - 1 > upperbound) |
8a3fe4f8 | 3805 | error (_("slice out of range")); |
ac3eeb49 | 3806 | |
c906108c SS |
3807 | /* FIXME-type-allocation: need a way to free this type when we are |
3808 | done with it. */ | |
0c9c3474 SA |
3809 | slice_range_type = create_static_range_type ((struct type *) NULL, |
3810 | TYPE_TARGET_TYPE (range_type), | |
3811 | lowbound, | |
3812 | lowbound + length - 1); | |
ac3eeb49 | 3813 | |
a7c88acd JB |
3814 | { |
3815 | struct type *element_type = TYPE_TARGET_TYPE (array_type); | |
3816 | LONGEST offset | |
3817 | = (lowbound - lowerbound) * TYPE_LENGTH (check_typedef (element_type)); | |
ac3eeb49 | 3818 | |
a7c88acd JB |
3819 | slice_type = create_array_type ((struct type *) NULL, |
3820 | element_type, | |
3821 | slice_range_type); | |
3822 | TYPE_CODE (slice_type) = TYPE_CODE (array_type); | |
ac3eeb49 | 3823 | |
a7c88acd JB |
3824 | if (VALUE_LVAL (array) == lval_memory && value_lazy (array)) |
3825 | slice = allocate_value_lazy (slice_type); | |
3826 | else | |
3827 | { | |
3828 | slice = allocate_value (slice_type); | |
3829 | value_contents_copy (slice, 0, array, offset, | |
3ae385af | 3830 | type_length_units (slice_type)); |
a7c88acd JB |
3831 | } |
3832 | ||
3833 | set_value_component_location (slice, array); | |
a7c88acd JB |
3834 | set_value_offset (slice, value_offset (array) + offset); |
3835 | } | |
ac3eeb49 | 3836 | |
c906108c SS |
3837 | return slice; |
3838 | } | |
3839 | ||
ac3eeb49 MS |
3840 | /* Create a value for a FORTRAN complex number. Currently most of the |
3841 | time values are coerced to COMPLEX*16 (i.e. a complex number | |
070ad9f0 DB |
3842 | composed of 2 doubles. This really should be a smarter routine |
3843 | that figures out precision inteligently as opposed to assuming | |
ac3eeb49 | 3844 | doubles. FIXME: fmb */ |
c906108c | 3845 | |
f23631e4 | 3846 | struct value * |
ac3eeb49 MS |
3847 | value_literal_complex (struct value *arg1, |
3848 | struct value *arg2, | |
3849 | struct type *type) | |
c906108c | 3850 | { |
f23631e4 | 3851 | struct value *val; |
c906108c SS |
3852 | struct type *real_type = TYPE_TARGET_TYPE (type); |
3853 | ||
3854 | val = allocate_value (type); | |
3855 | arg1 = value_cast (real_type, arg1); | |
3856 | arg2 = value_cast (real_type, arg2); | |
3857 | ||
990a07ab | 3858 | memcpy (value_contents_raw (val), |
0fd88904 | 3859 | value_contents (arg1), TYPE_LENGTH (real_type)); |
990a07ab | 3860 | memcpy (value_contents_raw (val) + TYPE_LENGTH (real_type), |
0fd88904 | 3861 | value_contents (arg2), TYPE_LENGTH (real_type)); |
c906108c SS |
3862 | return val; |
3863 | } | |
3864 | ||
ac3eeb49 | 3865 | /* Cast a value into the appropriate complex data type. */ |
c906108c | 3866 | |
f23631e4 AC |
3867 | static struct value * |
3868 | cast_into_complex (struct type *type, struct value *val) | |
c906108c SS |
3869 | { |
3870 | struct type *real_type = TYPE_TARGET_TYPE (type); | |
ac3eeb49 | 3871 | |
df407dfe | 3872 | if (TYPE_CODE (value_type (val)) == TYPE_CODE_COMPLEX) |
c906108c | 3873 | { |
df407dfe | 3874 | struct type *val_real_type = TYPE_TARGET_TYPE (value_type (val)); |
f23631e4 AC |
3875 | struct value *re_val = allocate_value (val_real_type); |
3876 | struct value *im_val = allocate_value (val_real_type); | |
c906108c | 3877 | |
990a07ab | 3878 | memcpy (value_contents_raw (re_val), |
0fd88904 | 3879 | value_contents (val), TYPE_LENGTH (val_real_type)); |
990a07ab | 3880 | memcpy (value_contents_raw (im_val), |
0fd88904 | 3881 | value_contents (val) + TYPE_LENGTH (val_real_type), |
c5aa993b | 3882 | TYPE_LENGTH (val_real_type)); |
c906108c SS |
3883 | |
3884 | return value_literal_complex (re_val, im_val, type); | |
3885 | } | |
df407dfe AC |
3886 | else if (TYPE_CODE (value_type (val)) == TYPE_CODE_FLT |
3887 | || TYPE_CODE (value_type (val)) == TYPE_CODE_INT) | |
ac3eeb49 MS |
3888 | return value_literal_complex (val, |
3889 | value_zero (real_type, not_lval), | |
3890 | type); | |
c906108c | 3891 | else |
8a3fe4f8 | 3892 | error (_("cannot cast non-number to complex")); |
c906108c SS |
3893 | } |
3894 | ||
3895 | void | |
fba45db2 | 3896 | _initialize_valops (void) |
c906108c | 3897 | { |
5bf193a2 AC |
3898 | add_setshow_boolean_cmd ("overload-resolution", class_support, |
3899 | &overload_resolution, _("\ | |
3900 | Set overload resolution in evaluating C++ functions."), _("\ | |
ac3eeb49 MS |
3901 | Show overload resolution in evaluating C++ functions."), |
3902 | NULL, NULL, | |
920d2a44 | 3903 | show_overload_resolution, |
5bf193a2 | 3904 | &setlist, &showlist); |
c906108c | 3905 | overload_resolution = 1; |
c906108c | 3906 | } |