Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Perform non-arithmetic operations on values, for GDB. |
990a07ab | 2 | |
e2882c85 | 3 | Copyright (C) 1986-2018 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" |
50637b26 | 37 | #include "target-float.h" |
e6ca34fc | 38 | #include "tracepoint.h" |
f4c5303c | 39 | #include "observer.h" |
3e3b026f | 40 | #include "objfiles.h" |
233e8b28 | 41 | #include "extension.h" |
26fcd5d7 | 42 | #include "byte-vector.h" |
c906108c | 43 | |
ccce17b0 | 44 | extern unsigned int overload_debug; |
c906108c SS |
45 | /* Local functions. */ |
46 | ||
ad2f7632 DJ |
47 | static int typecmp (int staticp, int varargs, int nargs, |
48 | struct field t1[], struct value *t2[]); | |
c906108c | 49 | |
714f19d5 | 50 | static struct value *search_struct_field (const char *, struct value *, |
8a13d42d | 51 | struct type *, int); |
c906108c | 52 | |
714f19d5 TT |
53 | static struct value *search_struct_method (const char *, struct value **, |
54 | struct value **, | |
6b850546 | 55 | LONGEST, int *, struct type *); |
c906108c | 56 | |
da096638 | 57 | static int find_oload_champ_namespace (struct value **, int, |
ac3eeb49 MS |
58 | const char *, const char *, |
59 | struct symbol ***, | |
7322dca9 SW |
60 | struct badness_vector **, |
61 | const int no_adl); | |
8d577d32 DC |
62 | |
63 | static | |
da096638 | 64 | int find_oload_champ_namespace_loop (struct value **, int, |
ac3eeb49 MS |
65 | const char *, const char *, |
66 | int, struct symbol ***, | |
7322dca9 SW |
67 | struct badness_vector **, int *, |
68 | const int no_adl); | |
ac3eeb49 | 69 | |
9cf95373 | 70 | static int find_oload_champ (struct value **, int, int, |
ba18742c SM |
71 | struct fn_field *, |
72 | const std::vector<xmethod_worker_up> *, | |
233e8b28 | 73 | struct symbol **, struct badness_vector **); |
ac3eeb49 | 74 | |
2bca57ba | 75 | static int oload_method_static_p (struct fn_field *, int); |
8d577d32 DC |
76 | |
77 | enum oload_classification { STANDARD, NON_STANDARD, INCOMPATIBLE }; | |
78 | ||
79 | static enum | |
ac3eeb49 MS |
80 | oload_classification classify_oload_match (struct badness_vector *, |
81 | int, int); | |
8d577d32 | 82 | |
ac3eeb49 MS |
83 | static struct value *value_struct_elt_for_reference (struct type *, |
84 | int, struct type *, | |
c848d642 | 85 | const char *, |
ac3eeb49 MS |
86 | struct type *, |
87 | int, enum noside); | |
79c2c32d | 88 | |
ac3eeb49 | 89 | static struct value *value_namespace_elt (const struct type *, |
c848d642 | 90 | const char *, int , enum noside); |
79c2c32d | 91 | |
ac3eeb49 | 92 | static struct value *value_maybe_namespace_elt (const struct type *, |
c848d642 | 93 | const char *, int, |
ac3eeb49 | 94 | enum noside); |
63d06c5c | 95 | |
a14ed312 | 96 | static CORE_ADDR allocate_space_in_inferior (int); |
c906108c | 97 | |
f23631e4 | 98 | static struct value *cast_into_complex (struct type *, struct value *); |
c906108c | 99 | |
233e8b28 | 100 | static void find_method_list (struct value **, const char *, |
6b850546 | 101 | LONGEST, struct type *, struct fn_field **, int *, |
ba18742c | 102 | std::vector<xmethod_worker_up> *, |
6b850546 | 103 | struct type **, LONGEST *); |
7a292a7a | 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); |
7022349d | 194 | val = call_function_by_hand (val, NULL, 1, &blocklen); |
c906108c SS |
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 | ||
c973d0aa PA |
381 | /* Strip typedefs / resolve stubs in order to get at the type's |
382 | code/length, but remember the original type, to use as the | |
383 | resulting type of the cast, in case it was a typedef. */ | |
384 | struct type *to_type = type; | |
385 | ||
f168693b | 386 | type = check_typedef (type); |
c906108c | 387 | code1 = TYPE_CODE (type); |
994b9211 | 388 | arg2 = coerce_ref (arg2); |
df407dfe | 389 | type2 = check_typedef (value_type (arg2)); |
c906108c | 390 | |
fb933624 DJ |
391 | /* You can't cast to a reference type. See value_cast_pointers |
392 | instead. */ | |
aa006118 | 393 | gdb_assert (!TYPE_IS_REFERENCE (type)); |
fb933624 | 394 | |
ac3eeb49 MS |
395 | /* A cast to an undetermined-length array_type, such as |
396 | (TYPE [])OBJECT, is treated like a cast to (TYPE [N])OBJECT, | |
397 | where N is sizeof(OBJECT)/sizeof(TYPE). */ | |
c906108c SS |
398 | if (code1 == TYPE_CODE_ARRAY) |
399 | { | |
400 | struct type *element_type = TYPE_TARGET_TYPE (type); | |
401 | unsigned element_length = TYPE_LENGTH (check_typedef (element_type)); | |
a109c7c1 | 402 | |
d78df370 | 403 | if (element_length > 0 && TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type)) |
c906108c SS |
404 | { |
405 | struct type *range_type = TYPE_INDEX_TYPE (type); | |
406 | int val_length = TYPE_LENGTH (type2); | |
407 | LONGEST low_bound, high_bound, new_length; | |
a109c7c1 | 408 | |
c906108c SS |
409 | if (get_discrete_bounds (range_type, &low_bound, &high_bound) < 0) |
410 | low_bound = 0, high_bound = 0; | |
411 | new_length = val_length / element_length; | |
412 | if (val_length % element_length != 0) | |
3e43a32a MS |
413 | warning (_("array element type size does not " |
414 | "divide object size in cast")); | |
ac3eeb49 MS |
415 | /* FIXME-type-allocation: need a way to free this type when |
416 | we are done with it. */ | |
0c9c3474 SA |
417 | range_type = create_static_range_type ((struct type *) NULL, |
418 | TYPE_TARGET_TYPE (range_type), | |
419 | low_bound, | |
420 | new_length + low_bound - 1); | |
ac3eeb49 MS |
421 | deprecated_set_value_type (arg2, |
422 | create_array_type ((struct type *) NULL, | |
423 | element_type, | |
424 | range_type)); | |
c906108c SS |
425 | return arg2; |
426 | } | |
427 | } | |
428 | ||
429 | if (current_language->c_style_arrays | |
3bdf2bbd KW |
430 | && TYPE_CODE (type2) == TYPE_CODE_ARRAY |
431 | && !TYPE_VECTOR (type2)) | |
c906108c SS |
432 | arg2 = value_coerce_array (arg2); |
433 | ||
434 | if (TYPE_CODE (type2) == TYPE_CODE_FUNC) | |
435 | arg2 = value_coerce_function (arg2); | |
436 | ||
df407dfe | 437 | type2 = check_typedef (value_type (arg2)); |
c906108c SS |
438 | code2 = TYPE_CODE (type2); |
439 | ||
440 | if (code1 == TYPE_CODE_COMPLEX) | |
c973d0aa | 441 | return cast_into_complex (to_type, arg2); |
c906108c SS |
442 | if (code1 == TYPE_CODE_BOOL) |
443 | { | |
444 | code1 = TYPE_CODE_INT; | |
445 | convert_to_boolean = 1; | |
446 | } | |
447 | if (code1 == TYPE_CODE_CHAR) | |
448 | code1 = TYPE_CODE_INT; | |
449 | if (code2 == TYPE_CODE_BOOL || code2 == TYPE_CODE_CHAR) | |
450 | code2 = TYPE_CODE_INT; | |
451 | ||
452 | scalar = (code2 == TYPE_CODE_INT || code2 == TYPE_CODE_FLT | |
4ef30785 TJB |
453 | || code2 == TYPE_CODE_DECFLOAT || code2 == TYPE_CODE_ENUM |
454 | || code2 == TYPE_CODE_RANGE); | |
c906108c | 455 | |
6af87b03 AR |
456 | if ((code1 == TYPE_CODE_STRUCT || code1 == TYPE_CODE_UNION) |
457 | && (code2 == TYPE_CODE_STRUCT || code2 == TYPE_CODE_UNION) | |
c906108c | 458 | && TYPE_NAME (type) != 0) |
694182d2 | 459 | { |
c973d0aa | 460 | struct value *v = value_cast_structs (to_type, arg2); |
a109c7c1 | 461 | |
694182d2 DJ |
462 | if (v) |
463 | return v; | |
464 | } | |
465 | ||
50637b26 | 466 | if (is_floating_type (type) && scalar) |
4ef30785 | 467 | { |
50637b26 UW |
468 | if (is_floating_value (arg2)) |
469 | { | |
470 | struct value *v = allocate_value (to_type); | |
471 | target_float_convert (value_contents (arg2), type2, | |
472 | value_contents_raw (v), type); | |
473 | return v; | |
474 | } | |
475 | ||
3b4b2f16 | 476 | /* The only option left is an integral type. */ |
50637b26 UW |
477 | if (TYPE_UNSIGNED (type2)) |
478 | return value_from_ulongest (to_type, value_as_long (arg2)); | |
4ef30785 | 479 | else |
50637b26 | 480 | return value_from_longest (to_type, value_as_long (arg2)); |
4ef30785 | 481 | } |
c906108c SS |
482 | else if ((code1 == TYPE_CODE_INT || code1 == TYPE_CODE_ENUM |
483 | || code1 == TYPE_CODE_RANGE) | |
0d5de010 DJ |
484 | && (scalar || code2 == TYPE_CODE_PTR |
485 | || code2 == TYPE_CODE_MEMBERPTR)) | |
c906108c SS |
486 | { |
487 | LONGEST longest; | |
c5aa993b | 488 | |
2bf1f4a1 | 489 | /* When we cast pointers to integers, we mustn't use |
76e71323 | 490 | gdbarch_pointer_to_address to find the address the pointer |
2bf1f4a1 JB |
491 | represents, as value_as_long would. GDB should evaluate |
492 | expressions just as the compiler would --- and the compiler | |
493 | sees a cast as a simple reinterpretation of the pointer's | |
494 | bits. */ | |
495 | if (code2 == TYPE_CODE_PTR) | |
e17a4113 UW |
496 | longest = extract_unsigned_integer |
497 | (value_contents (arg2), TYPE_LENGTH (type2), | |
498 | gdbarch_byte_order (get_type_arch (type2))); | |
2bf1f4a1 JB |
499 | else |
500 | longest = value_as_long (arg2); | |
c973d0aa | 501 | return value_from_longest (to_type, convert_to_boolean ? |
716c501e | 502 | (LONGEST) (longest ? 1 : 0) : longest); |
c906108c | 503 | } |
ac3eeb49 MS |
504 | else if (code1 == TYPE_CODE_PTR && (code2 == TYPE_CODE_INT |
505 | || code2 == TYPE_CODE_ENUM | |
506 | || code2 == TYPE_CODE_RANGE)) | |
634acd5f | 507 | { |
4603e466 DT |
508 | /* TYPE_LENGTH (type) is the length of a pointer, but we really |
509 | want the length of an address! -- we are really dealing with | |
510 | addresses (i.e., gdb representations) not pointers (i.e., | |
511 | target representations) here. | |
512 | ||
513 | This allows things like "print *(int *)0x01000234" to work | |
514 | without printing a misleading message -- which would | |
515 | otherwise occur when dealing with a target having two byte | |
516 | pointers and four byte addresses. */ | |
517 | ||
50810684 | 518 | int addr_bit = gdbarch_addr_bit (get_type_arch (type2)); |
634acd5f | 519 | LONGEST longest = value_as_long (arg2); |
a109c7c1 | 520 | |
4603e466 | 521 | if (addr_bit < sizeof (LONGEST) * HOST_CHAR_BIT) |
634acd5f | 522 | { |
4603e466 DT |
523 | if (longest >= ((LONGEST) 1 << addr_bit) |
524 | || longest <= -((LONGEST) 1 << addr_bit)) | |
8a3fe4f8 | 525 | warning (_("value truncated")); |
634acd5f | 526 | } |
c973d0aa | 527 | return value_from_longest (to_type, longest); |
634acd5f | 528 | } |
0d5de010 DJ |
529 | else if (code1 == TYPE_CODE_METHODPTR && code2 == TYPE_CODE_INT |
530 | && value_as_long (arg2) == 0) | |
531 | { | |
c973d0aa | 532 | struct value *result = allocate_value (to_type); |
a109c7c1 | 533 | |
c973d0aa | 534 | cplus_make_method_ptr (to_type, value_contents_writeable (result), 0, 0); |
0d5de010 DJ |
535 | return result; |
536 | } | |
537 | else if (code1 == TYPE_CODE_MEMBERPTR && code2 == TYPE_CODE_INT | |
538 | && value_as_long (arg2) == 0) | |
539 | { | |
540 | /* The Itanium C++ ABI represents NULL pointers to members as | |
541 | minus one, instead of biasing the normal case. */ | |
c973d0aa | 542 | return value_from_longest (to_type, -1); |
0d5de010 | 543 | } |
8954db33 AB |
544 | else if (code1 == TYPE_CODE_ARRAY && TYPE_VECTOR (type) |
545 | && code2 == TYPE_CODE_ARRAY && TYPE_VECTOR (type2) | |
546 | && TYPE_LENGTH (type) != TYPE_LENGTH (type2)) | |
547 | error (_("Cannot convert between vector values of different sizes")); | |
548 | else if (code1 == TYPE_CODE_ARRAY && TYPE_VECTOR (type) && scalar | |
549 | && TYPE_LENGTH (type) != TYPE_LENGTH (type2)) | |
550 | error (_("can only cast scalar to vector of same size")); | |
0ba2eb0f TT |
551 | else if (code1 == TYPE_CODE_VOID) |
552 | { | |
c973d0aa | 553 | return value_zero (to_type, not_lval); |
0ba2eb0f | 554 | } |
c906108c SS |
555 | else if (TYPE_LENGTH (type) == TYPE_LENGTH (type2)) |
556 | { | |
557 | if (code1 == TYPE_CODE_PTR && code2 == TYPE_CODE_PTR) | |
c973d0aa | 558 | return value_cast_pointers (to_type, arg2, 0); |
fb933624 | 559 | |
0d5de010 | 560 | arg2 = value_copy (arg2); |
c973d0aa PA |
561 | deprecated_set_value_type (arg2, to_type); |
562 | set_value_enclosing_type (arg2, to_type); | |
b44d461b | 563 | set_value_pointed_to_offset (arg2, 0); /* pai: chk_val */ |
c906108c SS |
564 | return arg2; |
565 | } | |
c906108c | 566 | else if (VALUE_LVAL (arg2) == lval_memory) |
c973d0aa | 567 | return value_at_lazy (to_type, value_address (arg2)); |
c906108c SS |
568 | else |
569 | { | |
8a3fe4f8 | 570 | error (_("Invalid cast.")); |
c906108c SS |
571 | return 0; |
572 | } | |
573 | } | |
574 | ||
4e8f195d TT |
575 | /* The C++ reinterpret_cast operator. */ |
576 | ||
577 | struct value * | |
578 | value_reinterpret_cast (struct type *type, struct value *arg) | |
579 | { | |
580 | struct value *result; | |
581 | struct type *real_type = check_typedef (type); | |
582 | struct type *arg_type, *dest_type; | |
583 | int is_ref = 0; | |
584 | enum type_code dest_code, arg_code; | |
585 | ||
586 | /* Do reference, function, and array conversion. */ | |
587 | arg = coerce_array (arg); | |
588 | ||
589 | /* Attempt to preserve the type the user asked for. */ | |
590 | dest_type = type; | |
591 | ||
592 | /* If we are casting to a reference type, transform | |
aa006118 AV |
593 | reinterpret_cast<T&[&]>(V) to *reinterpret_cast<T*>(&V). */ |
594 | if (TYPE_IS_REFERENCE (real_type)) | |
4e8f195d TT |
595 | { |
596 | is_ref = 1; | |
597 | arg = value_addr (arg); | |
598 | dest_type = lookup_pointer_type (TYPE_TARGET_TYPE (dest_type)); | |
599 | real_type = lookup_pointer_type (real_type); | |
600 | } | |
601 | ||
602 | arg_type = value_type (arg); | |
603 | ||
604 | dest_code = TYPE_CODE (real_type); | |
605 | arg_code = TYPE_CODE (arg_type); | |
606 | ||
607 | /* We can convert pointer types, or any pointer type to int, or int | |
608 | type to pointer. */ | |
609 | if ((dest_code == TYPE_CODE_PTR && arg_code == TYPE_CODE_INT) | |
610 | || (dest_code == TYPE_CODE_INT && arg_code == TYPE_CODE_PTR) | |
611 | || (dest_code == TYPE_CODE_METHODPTR && arg_code == TYPE_CODE_INT) | |
612 | || (dest_code == TYPE_CODE_INT && arg_code == TYPE_CODE_METHODPTR) | |
613 | || (dest_code == TYPE_CODE_MEMBERPTR && arg_code == TYPE_CODE_INT) | |
614 | || (dest_code == TYPE_CODE_INT && arg_code == TYPE_CODE_MEMBERPTR) | |
615 | || (dest_code == arg_code | |
616 | && (dest_code == TYPE_CODE_PTR | |
617 | || dest_code == TYPE_CODE_METHODPTR | |
618 | || dest_code == TYPE_CODE_MEMBERPTR))) | |
619 | result = value_cast (dest_type, arg); | |
620 | else | |
621 | error (_("Invalid reinterpret_cast")); | |
622 | ||
623 | if (is_ref) | |
a65cfae5 AV |
624 | result = value_cast (type, value_ref (value_ind (result), |
625 | TYPE_CODE (type))); | |
4e8f195d TT |
626 | |
627 | return result; | |
628 | } | |
629 | ||
630 | /* A helper for value_dynamic_cast. This implements the first of two | |
631 | runtime checks: we iterate over all the base classes of the value's | |
632 | class which are equal to the desired class; if only one of these | |
633 | holds the value, then it is the answer. */ | |
634 | ||
635 | static int | |
636 | dynamic_cast_check_1 (struct type *desired_type, | |
8af8e3bc | 637 | const gdb_byte *valaddr, |
6b850546 | 638 | LONGEST embedded_offset, |
4e8f195d | 639 | CORE_ADDR address, |
8af8e3bc | 640 | struct value *val, |
4e8f195d TT |
641 | struct type *search_type, |
642 | CORE_ADDR arg_addr, | |
643 | struct type *arg_type, | |
644 | struct value **result) | |
645 | { | |
646 | int i, result_count = 0; | |
647 | ||
648 | for (i = 0; i < TYPE_N_BASECLASSES (search_type) && result_count < 2; ++i) | |
649 | { | |
6b850546 DT |
650 | LONGEST offset = baseclass_offset (search_type, i, valaddr, |
651 | embedded_offset, | |
652 | address, val); | |
a109c7c1 | 653 | |
4e8f195d TT |
654 | if (class_types_same_p (desired_type, TYPE_BASECLASS (search_type, i))) |
655 | { | |
8af8e3bc PA |
656 | if (address + embedded_offset + offset >= arg_addr |
657 | && address + embedded_offset + offset < arg_addr + TYPE_LENGTH (arg_type)) | |
4e8f195d TT |
658 | { |
659 | ++result_count; | |
660 | if (!*result) | |
661 | *result = value_at_lazy (TYPE_BASECLASS (search_type, i), | |
8af8e3bc | 662 | address + embedded_offset + offset); |
4e8f195d TT |
663 | } |
664 | } | |
665 | else | |
666 | result_count += dynamic_cast_check_1 (desired_type, | |
8af8e3bc PA |
667 | valaddr, |
668 | embedded_offset + offset, | |
669 | address, val, | |
4e8f195d TT |
670 | TYPE_BASECLASS (search_type, i), |
671 | arg_addr, | |
672 | arg_type, | |
673 | result); | |
674 | } | |
675 | ||
676 | return result_count; | |
677 | } | |
678 | ||
679 | /* A helper for value_dynamic_cast. This implements the second of two | |
680 | runtime checks: we look for a unique public sibling class of the | |
681 | argument's declared class. */ | |
682 | ||
683 | static int | |
684 | dynamic_cast_check_2 (struct type *desired_type, | |
8af8e3bc | 685 | const gdb_byte *valaddr, |
6b850546 | 686 | LONGEST embedded_offset, |
4e8f195d | 687 | CORE_ADDR address, |
8af8e3bc | 688 | struct value *val, |
4e8f195d TT |
689 | struct type *search_type, |
690 | struct value **result) | |
691 | { | |
692 | int i, result_count = 0; | |
693 | ||
694 | for (i = 0; i < TYPE_N_BASECLASSES (search_type) && result_count < 2; ++i) | |
695 | { | |
6b850546 | 696 | LONGEST offset; |
4e8f195d TT |
697 | |
698 | if (! BASETYPE_VIA_PUBLIC (search_type, i)) | |
699 | continue; | |
700 | ||
8af8e3bc PA |
701 | offset = baseclass_offset (search_type, i, valaddr, embedded_offset, |
702 | address, val); | |
4e8f195d TT |
703 | if (class_types_same_p (desired_type, TYPE_BASECLASS (search_type, i))) |
704 | { | |
705 | ++result_count; | |
706 | if (*result == NULL) | |
707 | *result = value_at_lazy (TYPE_BASECLASS (search_type, i), | |
8af8e3bc | 708 | address + embedded_offset + offset); |
4e8f195d TT |
709 | } |
710 | else | |
711 | result_count += dynamic_cast_check_2 (desired_type, | |
8af8e3bc PA |
712 | valaddr, |
713 | embedded_offset + offset, | |
714 | address, val, | |
4e8f195d TT |
715 | TYPE_BASECLASS (search_type, i), |
716 | result); | |
717 | } | |
718 | ||
719 | return result_count; | |
720 | } | |
721 | ||
722 | /* The C++ dynamic_cast operator. */ | |
723 | ||
724 | struct value * | |
725 | value_dynamic_cast (struct type *type, struct value *arg) | |
726 | { | |
6b850546 DT |
727 | int full, using_enc; |
728 | LONGEST top; | |
4e8f195d TT |
729 | struct type *resolved_type = check_typedef (type); |
730 | struct type *arg_type = check_typedef (value_type (arg)); | |
731 | struct type *class_type, *rtti_type; | |
732 | struct value *result, *tem, *original_arg = arg; | |
733 | CORE_ADDR addr; | |
aa006118 | 734 | int is_ref = TYPE_IS_REFERENCE (resolved_type); |
4e8f195d TT |
735 | |
736 | if (TYPE_CODE (resolved_type) != TYPE_CODE_PTR | |
aa006118 | 737 | && !TYPE_IS_REFERENCE (resolved_type)) |
4e8f195d TT |
738 | error (_("Argument to dynamic_cast must be a pointer or reference type")); |
739 | if (TYPE_CODE (TYPE_TARGET_TYPE (resolved_type)) != TYPE_CODE_VOID | |
4753d33b | 740 | && TYPE_CODE (TYPE_TARGET_TYPE (resolved_type)) != TYPE_CODE_STRUCT) |
4e8f195d TT |
741 | error (_("Argument to dynamic_cast must be pointer to class or `void *'")); |
742 | ||
743 | class_type = check_typedef (TYPE_TARGET_TYPE (resolved_type)); | |
744 | if (TYPE_CODE (resolved_type) == TYPE_CODE_PTR) | |
745 | { | |
746 | if (TYPE_CODE (arg_type) != TYPE_CODE_PTR | |
747 | && ! (TYPE_CODE (arg_type) == TYPE_CODE_INT | |
748 | && value_as_long (arg) == 0)) | |
749 | error (_("Argument to dynamic_cast does not have pointer type")); | |
750 | if (TYPE_CODE (arg_type) == TYPE_CODE_PTR) | |
751 | { | |
752 | arg_type = check_typedef (TYPE_TARGET_TYPE (arg_type)); | |
4753d33b | 753 | if (TYPE_CODE (arg_type) != TYPE_CODE_STRUCT) |
3e43a32a MS |
754 | error (_("Argument to dynamic_cast does " |
755 | "not have pointer to class type")); | |
4e8f195d TT |
756 | } |
757 | ||
758 | /* Handle NULL pointers. */ | |
759 | if (value_as_long (arg) == 0) | |
760 | return value_zero (type, not_lval); | |
761 | ||
762 | arg = value_ind (arg); | |
763 | } | |
764 | else | |
765 | { | |
4753d33b | 766 | if (TYPE_CODE (arg_type) != TYPE_CODE_STRUCT) |
4e8f195d TT |
767 | error (_("Argument to dynamic_cast does not have class type")); |
768 | } | |
769 | ||
770 | /* If the classes are the same, just return the argument. */ | |
771 | if (class_types_same_p (class_type, arg_type)) | |
772 | return value_cast (type, arg); | |
773 | ||
774 | /* If the target type is a unique base class of the argument's | |
775 | declared type, just cast it. */ | |
776 | if (is_ancestor (class_type, arg_type)) | |
777 | { | |
778 | if (is_unique_ancestor (class_type, arg)) | |
779 | return value_cast (type, original_arg); | |
780 | error (_("Ambiguous dynamic_cast")); | |
781 | } | |
782 | ||
783 | rtti_type = value_rtti_type (arg, &full, &top, &using_enc); | |
784 | if (! rtti_type) | |
785 | error (_("Couldn't determine value's most derived type for dynamic_cast")); | |
786 | ||
787 | /* Compute the most derived object's address. */ | |
788 | addr = value_address (arg); | |
789 | if (full) | |
790 | { | |
791 | /* Done. */ | |
792 | } | |
793 | else if (using_enc) | |
794 | addr += top; | |
795 | else | |
796 | addr += top + value_embedded_offset (arg); | |
797 | ||
798 | /* dynamic_cast<void *> means to return a pointer to the | |
799 | most-derived object. */ | |
800 | if (TYPE_CODE (resolved_type) == TYPE_CODE_PTR | |
801 | && TYPE_CODE (TYPE_TARGET_TYPE (resolved_type)) == TYPE_CODE_VOID) | |
802 | return value_at_lazy (type, addr); | |
803 | ||
804 | tem = value_at (type, addr); | |
9f1f738a | 805 | type = value_type (tem); |
4e8f195d TT |
806 | |
807 | /* The first dynamic check specified in 5.2.7. */ | |
808 | if (is_public_ancestor (arg_type, TYPE_TARGET_TYPE (resolved_type))) | |
809 | { | |
810 | if (class_types_same_p (rtti_type, TYPE_TARGET_TYPE (resolved_type))) | |
811 | return tem; | |
812 | result = NULL; | |
813 | if (dynamic_cast_check_1 (TYPE_TARGET_TYPE (resolved_type), | |
8af8e3bc PA |
814 | value_contents_for_printing (tem), |
815 | value_embedded_offset (tem), | |
816 | value_address (tem), tem, | |
4e8f195d TT |
817 | rtti_type, addr, |
818 | arg_type, | |
819 | &result) == 1) | |
820 | return value_cast (type, | |
a65cfae5 AV |
821 | is_ref |
822 | ? value_ref (result, TYPE_CODE (resolved_type)) | |
823 | : value_addr (result)); | |
4e8f195d TT |
824 | } |
825 | ||
826 | /* The second dynamic check specified in 5.2.7. */ | |
827 | result = NULL; | |
828 | if (is_public_ancestor (arg_type, rtti_type) | |
829 | && dynamic_cast_check_2 (TYPE_TARGET_TYPE (resolved_type), | |
8af8e3bc PA |
830 | value_contents_for_printing (tem), |
831 | value_embedded_offset (tem), | |
832 | value_address (tem), tem, | |
4e8f195d TT |
833 | rtti_type, &result) == 1) |
834 | return value_cast (type, | |
a65cfae5 AV |
835 | is_ref |
836 | ? value_ref (result, TYPE_CODE (resolved_type)) | |
837 | : value_addr (result)); | |
4e8f195d TT |
838 | |
839 | if (TYPE_CODE (resolved_type) == TYPE_CODE_PTR) | |
840 | return value_zero (type, not_lval); | |
841 | ||
842 | error (_("dynamic_cast failed")); | |
843 | } | |
844 | ||
c906108c SS |
845 | /* Create a value of type TYPE that is zero, and return it. */ |
846 | ||
f23631e4 | 847 | struct value * |
fba45db2 | 848 | value_zero (struct type *type, enum lval_type lv) |
c906108c | 849 | { |
f23631e4 | 850 | struct value *val = allocate_value (type); |
c906108c | 851 | |
bb7da2bf | 852 | VALUE_LVAL (val) = (lv == lval_computed ? not_lval : lv); |
c906108c SS |
853 | return val; |
854 | } | |
855 | ||
18a46dbe | 856 | /* Create a not_lval value of numeric type TYPE that is one, and return it. */ |
301f0ecf DE |
857 | |
858 | struct value * | |
18a46dbe | 859 | value_one (struct type *type) |
301f0ecf DE |
860 | { |
861 | struct type *type1 = check_typedef (type); | |
4e608b4f | 862 | struct value *val; |
301f0ecf | 863 | |
50637b26 | 864 | if (is_integral_type (type1) || is_floating_type (type1)) |
301f0ecf DE |
865 | { |
866 | val = value_from_longest (type, (LONGEST) 1); | |
867 | } | |
120bd360 KW |
868 | else if (TYPE_CODE (type1) == TYPE_CODE_ARRAY && TYPE_VECTOR (type1)) |
869 | { | |
870 | struct type *eltype = check_typedef (TYPE_TARGET_TYPE (type1)); | |
cfa6f054 KW |
871 | int i; |
872 | LONGEST low_bound, high_bound; | |
120bd360 KW |
873 | struct value *tmp; |
874 | ||
cfa6f054 KW |
875 | if (!get_array_bounds (type1, &low_bound, &high_bound)) |
876 | error (_("Could not determine the vector bounds")); | |
877 | ||
120bd360 | 878 | val = allocate_value (type); |
cfa6f054 | 879 | for (i = 0; i < high_bound - low_bound + 1; i++) |
120bd360 | 880 | { |
18a46dbe | 881 | tmp = value_one (eltype); |
120bd360 KW |
882 | memcpy (value_contents_writeable (val) + i * TYPE_LENGTH (eltype), |
883 | value_contents_all (tmp), TYPE_LENGTH (eltype)); | |
884 | } | |
885 | } | |
301f0ecf DE |
886 | else |
887 | { | |
888 | error (_("Not a numeric type.")); | |
889 | } | |
890 | ||
18a46dbe JK |
891 | /* value_one result is never used for assignments to. */ |
892 | gdb_assert (VALUE_LVAL (val) == not_lval); | |
893 | ||
301f0ecf DE |
894 | return val; |
895 | } | |
896 | ||
80180f79 SA |
897 | /* Helper function for value_at, value_at_lazy, and value_at_lazy_stack. |
898 | The type of the created value may differ from the passed type TYPE. | |
899 | Make sure to retrieve the returned values's new type after this call | |
900 | e.g. in case the type is a variable length array. */ | |
4e5d721f DE |
901 | |
902 | static struct value * | |
903 | get_value_at (struct type *type, CORE_ADDR addr, int lazy) | |
904 | { | |
905 | struct value *val; | |
906 | ||
907 | if (TYPE_CODE (check_typedef (type)) == TYPE_CODE_VOID) | |
908 | error (_("Attempt to dereference a generic pointer.")); | |
909 | ||
a3d34bf4 | 910 | val = value_from_contents_and_address (type, NULL, addr); |
4e5d721f | 911 | |
a3d34bf4 PA |
912 | if (!lazy) |
913 | value_fetch_lazy (val); | |
4e5d721f DE |
914 | |
915 | return val; | |
916 | } | |
917 | ||
070ad9f0 | 918 | /* Return a value with type TYPE located at ADDR. |
c906108c SS |
919 | |
920 | Call value_at only if the data needs to be fetched immediately; | |
921 | if we can be 'lazy' and defer the fetch, perhaps indefinately, call | |
922 | value_at_lazy instead. value_at_lazy simply records the address of | |
070ad9f0 | 923 | the data and sets the lazy-evaluation-required flag. The lazy flag |
0fd88904 | 924 | is tested in the value_contents macro, which is used if and when |
80180f79 SA |
925 | the contents are actually required. The type of the created value |
926 | may differ from the passed type TYPE. Make sure to retrieve the | |
927 | returned values's new type after this call e.g. in case the type | |
928 | is a variable length array. | |
c906108c SS |
929 | |
930 | Note: value_at does *NOT* handle embedded offsets; perform such | |
ac3eeb49 | 931 | adjustments before or after calling it. */ |
c906108c | 932 | |
f23631e4 | 933 | struct value * |
00a4c844 | 934 | value_at (struct type *type, CORE_ADDR addr) |
c906108c | 935 | { |
4e5d721f | 936 | return get_value_at (type, addr, 0); |
c906108c SS |
937 | } |
938 | ||
80180f79 SA |
939 | /* Return a lazy value with type TYPE located at ADDR (cf. value_at). |
940 | The type of the created value may differ from the passed type TYPE. | |
941 | Make sure to retrieve the returned values's new type after this call | |
942 | e.g. in case the type is a variable length array. */ | |
c906108c | 943 | |
f23631e4 | 944 | struct value * |
00a4c844 | 945 | value_at_lazy (struct type *type, CORE_ADDR addr) |
c906108c | 946 | { |
4e5d721f | 947 | return get_value_at (type, addr, 1); |
c906108c SS |
948 | } |
949 | ||
e6ca34fc | 950 | void |
23f945bf | 951 | read_value_memory (struct value *val, LONGEST bit_offset, |
e6ca34fc PA |
952 | int stack, CORE_ADDR memaddr, |
953 | gdb_byte *buffer, size_t length) | |
954 | { | |
3ae385af SM |
955 | ULONGEST xfered_total = 0; |
956 | struct gdbarch *arch = get_value_arch (val); | |
957 | int unit_size = gdbarch_addressable_memory_unit_size (arch); | |
6d7e9d3b YQ |
958 | enum target_object object; |
959 | ||
960 | object = stack ? TARGET_OBJECT_STACK_MEMORY : TARGET_OBJECT_MEMORY; | |
5a2eb0ef | 961 | |
3ae385af | 962 | while (xfered_total < length) |
5a2eb0ef YQ |
963 | { |
964 | enum target_xfer_status status; | |
3ae385af | 965 | ULONGEST xfered_partial; |
5a2eb0ef YQ |
966 | |
967 | status = target_xfer_partial (current_target.beneath, | |
6d7e9d3b | 968 | object, NULL, |
3ae385af SM |
969 | buffer + xfered_total * unit_size, NULL, |
970 | memaddr + xfered_total, | |
971 | length - xfered_total, | |
972 | &xfered_partial); | |
5a2eb0ef YQ |
973 | |
974 | if (status == TARGET_XFER_OK) | |
975 | /* nothing */; | |
bc113b4e | 976 | else if (status == TARGET_XFER_UNAVAILABLE) |
23f945bf AA |
977 | mark_value_bits_unavailable (val, (xfered_total * HOST_CHAR_BIT |
978 | + bit_offset), | |
979 | xfered_partial * HOST_CHAR_BIT); | |
5a2eb0ef | 980 | else if (status == TARGET_XFER_EOF) |
3ae385af | 981 | memory_error (TARGET_XFER_E_IO, memaddr + xfered_total); |
e6ca34fc | 982 | else |
3ae385af | 983 | memory_error (status, memaddr + xfered_total); |
e6ca34fc | 984 | |
3ae385af | 985 | xfered_total += xfered_partial; |
5a2eb0ef | 986 | QUIT; |
e6ca34fc PA |
987 | } |
988 | } | |
c906108c SS |
989 | |
990 | /* Store the contents of FROMVAL into the location of TOVAL. | |
991 | Return a new value with the location of TOVAL and contents of FROMVAL. */ | |
992 | ||
f23631e4 AC |
993 | struct value * |
994 | value_assign (struct value *toval, struct value *fromval) | |
c906108c | 995 | { |
52f0bd74 | 996 | struct type *type; |
f23631e4 | 997 | struct value *val; |
cb741690 | 998 | struct frame_id old_frame; |
c906108c | 999 | |
88e3b34b | 1000 | if (!deprecated_value_modifiable (toval)) |
8a3fe4f8 | 1001 | error (_("Left operand of assignment is not a modifiable lvalue.")); |
c906108c | 1002 | |
994b9211 | 1003 | toval = coerce_ref (toval); |
c906108c | 1004 | |
df407dfe | 1005 | type = value_type (toval); |
c906108c | 1006 | if (VALUE_LVAL (toval) != lval_internalvar) |
3cbaedff | 1007 | fromval = value_cast (type, fromval); |
c906108c | 1008 | else |
63092375 DJ |
1009 | { |
1010 | /* Coerce arrays and functions to pointers, except for arrays | |
1011 | which only live in GDB's storage. */ | |
1012 | if (!value_must_coerce_to_target (fromval)) | |
1013 | fromval = coerce_array (fromval); | |
1014 | } | |
1015 | ||
f168693b | 1016 | type = check_typedef (type); |
c906108c | 1017 | |
ac3eeb49 MS |
1018 | /* Since modifying a register can trash the frame chain, and |
1019 | modifying memory can trash the frame cache, we save the old frame | |
1020 | and then restore the new frame afterwards. */ | |
206415a3 | 1021 | old_frame = get_frame_id (deprecated_safe_get_selected_frame ()); |
cb741690 | 1022 | |
c906108c SS |
1023 | switch (VALUE_LVAL (toval)) |
1024 | { | |
1025 | case lval_internalvar: | |
1026 | set_internalvar (VALUE_INTERNALVAR (toval), fromval); | |
4aac0db7 UW |
1027 | return value_of_internalvar (get_type_arch (type), |
1028 | VALUE_INTERNALVAR (toval)); | |
c906108c SS |
1029 | |
1030 | case lval_internalvar_component: | |
d9e98382 | 1031 | { |
6b850546 | 1032 | LONGEST offset = value_offset (toval); |
d9e98382 SDJ |
1033 | |
1034 | /* Are we dealing with a bitfield? | |
1035 | ||
1036 | It is important to mention that `value_parent (toval)' is | |
1037 | non-NULL iff `value_bitsize (toval)' is non-zero. */ | |
1038 | if (value_bitsize (toval)) | |
1039 | { | |
1040 | /* VALUE_INTERNALVAR below refers to the parent value, while | |
1041 | the offset is relative to this parent value. */ | |
1042 | gdb_assert (value_parent (value_parent (toval)) == NULL); | |
1043 | offset += value_offset (value_parent (toval)); | |
1044 | } | |
1045 | ||
1046 | set_internalvar_component (VALUE_INTERNALVAR (toval), | |
1047 | offset, | |
1048 | value_bitpos (toval), | |
1049 | value_bitsize (toval), | |
1050 | fromval); | |
1051 | } | |
c906108c SS |
1052 | break; |
1053 | ||
1054 | case lval_memory: | |
1055 | { | |
fc1a4b47 | 1056 | const gdb_byte *dest_buffer; |
c5aa993b JM |
1057 | CORE_ADDR changed_addr; |
1058 | int changed_len; | |
10c42a71 | 1059 | gdb_byte buffer[sizeof (LONGEST)]; |
c906108c | 1060 | |
df407dfe | 1061 | if (value_bitsize (toval)) |
c5aa993b | 1062 | { |
2d88202a | 1063 | struct value *parent = value_parent (toval); |
2d88202a | 1064 | |
a109c7c1 | 1065 | changed_addr = value_address (parent) + value_offset (toval); |
df407dfe AC |
1066 | changed_len = (value_bitpos (toval) |
1067 | + value_bitsize (toval) | |
c5aa993b JM |
1068 | + HOST_CHAR_BIT - 1) |
1069 | / HOST_CHAR_BIT; | |
c906108c | 1070 | |
4ea48cc1 DJ |
1071 | /* If we can read-modify-write exactly the size of the |
1072 | containing type (e.g. short or int) then do so. This | |
1073 | is safer for volatile bitfields mapped to hardware | |
1074 | registers. */ | |
1075 | if (changed_len < TYPE_LENGTH (type) | |
1076 | && TYPE_LENGTH (type) <= (int) sizeof (LONGEST) | |
2d88202a | 1077 | && ((LONGEST) changed_addr % TYPE_LENGTH (type)) == 0) |
4ea48cc1 DJ |
1078 | changed_len = TYPE_LENGTH (type); |
1079 | ||
c906108c | 1080 | if (changed_len > (int) sizeof (LONGEST)) |
3e43a32a MS |
1081 | error (_("Can't handle bitfields which " |
1082 | "don't fit in a %d bit word."), | |
baa6f10b | 1083 | (int) sizeof (LONGEST) * HOST_CHAR_BIT); |
c906108c | 1084 | |
2d88202a | 1085 | read_memory (changed_addr, buffer, changed_len); |
50810684 | 1086 | modify_field (type, buffer, value_as_long (fromval), |
df407dfe | 1087 | value_bitpos (toval), value_bitsize (toval)); |
c906108c SS |
1088 | dest_buffer = buffer; |
1089 | } | |
c906108c SS |
1090 | else |
1091 | { | |
42ae5230 | 1092 | changed_addr = value_address (toval); |
3ae385af | 1093 | changed_len = type_length_units (type); |
0fd88904 | 1094 | dest_buffer = value_contents (fromval); |
c906108c SS |
1095 | } |
1096 | ||
972daa01 | 1097 | write_memory_with_notification (changed_addr, dest_buffer, changed_len); |
c906108c SS |
1098 | } |
1099 | break; | |
1100 | ||
492254e9 | 1101 | case lval_register: |
c906108c | 1102 | { |
c906108c | 1103 | struct frame_info *frame; |
d80b854b | 1104 | struct gdbarch *gdbarch; |
ff2e87ac | 1105 | int value_reg; |
c906108c | 1106 | |
41b56feb KB |
1107 | /* Figure out which frame this is in currently. |
1108 | ||
1109 | We use VALUE_FRAME_ID for obtaining the value's frame id instead of | |
1110 | VALUE_NEXT_FRAME_ID due to requiring a frame which may be passed to | |
1111 | put_frame_register_bytes() below. That function will (eventually) | |
1112 | perform the necessary unwind operation by first obtaining the next | |
1113 | frame. */ | |
0c16dd26 | 1114 | frame = frame_find_by_id (VALUE_FRAME_ID (toval)); |
41b56feb | 1115 | |
0c16dd26 | 1116 | value_reg = VALUE_REGNUM (toval); |
c906108c SS |
1117 | |
1118 | if (!frame) | |
8a3fe4f8 | 1119 | error (_("Value being assigned to is no longer active.")); |
d80b854b UW |
1120 | |
1121 | gdbarch = get_frame_arch (frame); | |
3e871532 LM |
1122 | |
1123 | if (value_bitsize (toval)) | |
492254e9 | 1124 | { |
3e871532 | 1125 | struct value *parent = value_parent (toval); |
6b850546 | 1126 | LONGEST offset = value_offset (parent) + value_offset (toval); |
3e871532 LM |
1127 | int changed_len; |
1128 | gdb_byte buffer[sizeof (LONGEST)]; | |
1129 | int optim, unavail; | |
1130 | ||
1131 | changed_len = (value_bitpos (toval) | |
1132 | + value_bitsize (toval) | |
1133 | + HOST_CHAR_BIT - 1) | |
1134 | / HOST_CHAR_BIT; | |
1135 | ||
1136 | if (changed_len > (int) sizeof (LONGEST)) | |
1137 | error (_("Can't handle bitfields which " | |
1138 | "don't fit in a %d bit word."), | |
1139 | (int) sizeof (LONGEST) * HOST_CHAR_BIT); | |
1140 | ||
1141 | if (!get_frame_register_bytes (frame, value_reg, offset, | |
1142 | changed_len, buffer, | |
1143 | &optim, &unavail)) | |
1144 | { | |
1145 | if (optim) | |
1146 | throw_error (OPTIMIZED_OUT_ERROR, | |
1147 | _("value has been optimized out")); | |
1148 | if (unavail) | |
1149 | throw_error (NOT_AVAILABLE_ERROR, | |
1150 | _("value is not available")); | |
1151 | } | |
1152 | ||
1153 | modify_field (type, buffer, value_as_long (fromval), | |
1154 | value_bitpos (toval), value_bitsize (toval)); | |
1155 | ||
1156 | put_frame_register_bytes (frame, value_reg, offset, | |
1157 | changed_len, buffer); | |
492254e9 | 1158 | } |
c906108c | 1159 | else |
492254e9 | 1160 | { |
3e871532 LM |
1161 | if (gdbarch_convert_register_p (gdbarch, VALUE_REGNUM (toval), |
1162 | type)) | |
00fa51f6 | 1163 | { |
3e871532 LM |
1164 | /* If TOVAL is a special machine register requiring |
1165 | conversion of program values to a special raw | |
1166 | format. */ | |
1167 | gdbarch_value_to_register (gdbarch, frame, | |
1168 | VALUE_REGNUM (toval), type, | |
1169 | value_contents (fromval)); | |
00fa51f6 | 1170 | } |
c906108c | 1171 | else |
00fa51f6 UW |
1172 | { |
1173 | put_frame_register_bytes (frame, value_reg, | |
1174 | value_offset (toval), | |
1175 | TYPE_LENGTH (type), | |
1176 | value_contents (fromval)); | |
1177 | } | |
ff2e87ac | 1178 | } |
00fa51f6 | 1179 | |
162078c8 | 1180 | observer_notify_register_changed (frame, value_reg); |
ff2e87ac | 1181 | break; |
c906108c | 1182 | } |
5f5233d4 PA |
1183 | |
1184 | case lval_computed: | |
1185 | { | |
c8f2448a | 1186 | const struct lval_funcs *funcs = value_computed_funcs (toval); |
5f5233d4 | 1187 | |
ac71a68c JK |
1188 | if (funcs->write != NULL) |
1189 | { | |
1190 | funcs->write (toval, fromval); | |
1191 | break; | |
1192 | } | |
5f5233d4 | 1193 | } |
ac71a68c | 1194 | /* Fall through. */ |
5f5233d4 | 1195 | |
c906108c | 1196 | default: |
8a3fe4f8 | 1197 | error (_("Left operand of assignment is not an lvalue.")); |
c906108c SS |
1198 | } |
1199 | ||
cb741690 DJ |
1200 | /* Assigning to the stack pointer, frame pointer, and other |
1201 | (architecture and calling convention specific) registers may | |
d649a38e | 1202 | cause the frame cache and regcache to be out of date. Assigning to memory |
cb741690 DJ |
1203 | also can. We just do this on all assignments to registers or |
1204 | memory, for simplicity's sake; I doubt the slowdown matters. */ | |
1205 | switch (VALUE_LVAL (toval)) | |
1206 | { | |
1207 | case lval_memory: | |
1208 | case lval_register: | |
0e03807e | 1209 | case lval_computed: |
cb741690 | 1210 | |
d649a38e | 1211 | observer_notify_target_changed (¤t_target); |
cb741690 | 1212 | |
ac3eeb49 MS |
1213 | /* Having destroyed the frame cache, restore the selected |
1214 | frame. */ | |
cb741690 DJ |
1215 | |
1216 | /* FIXME: cagney/2002-11-02: There has to be a better way of | |
1217 | doing this. Instead of constantly saving/restoring the | |
1218 | frame. Why not create a get_selected_frame() function that, | |
1219 | having saved the selected frame's ID can automatically | |
1220 | re-find the previously selected frame automatically. */ | |
1221 | ||
1222 | { | |
1223 | struct frame_info *fi = frame_find_by_id (old_frame); | |
a109c7c1 | 1224 | |
cb741690 DJ |
1225 | if (fi != NULL) |
1226 | select_frame (fi); | |
1227 | } | |
1228 | ||
1229 | break; | |
1230 | default: | |
1231 | break; | |
1232 | } | |
1233 | ||
ac3eeb49 MS |
1234 | /* If the field does not entirely fill a LONGEST, then zero the sign |
1235 | bits. If the field is signed, and is negative, then sign | |
1236 | extend. */ | |
df407dfe AC |
1237 | if ((value_bitsize (toval) > 0) |
1238 | && (value_bitsize (toval) < 8 * (int) sizeof (LONGEST))) | |
c906108c SS |
1239 | { |
1240 | LONGEST fieldval = value_as_long (fromval); | |
df407dfe | 1241 | LONGEST valmask = (((ULONGEST) 1) << value_bitsize (toval)) - 1; |
c906108c SS |
1242 | |
1243 | fieldval &= valmask; | |
ac3eeb49 MS |
1244 | if (!TYPE_UNSIGNED (type) |
1245 | && (fieldval & (valmask ^ (valmask >> 1)))) | |
c906108c SS |
1246 | fieldval |= ~valmask; |
1247 | ||
1248 | fromval = value_from_longest (type, fieldval); | |
1249 | } | |
1250 | ||
4aac0db7 UW |
1251 | /* The return value is a copy of TOVAL so it shares its location |
1252 | information, but its contents are updated from FROMVAL. This | |
1253 | implies the returned value is not lazy, even if TOVAL was. */ | |
c906108c | 1254 | val = value_copy (toval); |
4aac0db7 | 1255 | set_value_lazy (val, 0); |
0fd88904 | 1256 | memcpy (value_contents_raw (val), value_contents (fromval), |
c906108c | 1257 | TYPE_LENGTH (type)); |
4aac0db7 UW |
1258 | |
1259 | /* We copy over the enclosing type and pointed-to offset from FROMVAL | |
1260 | in the case of pointer types. For object types, the enclosing type | |
1261 | and embedded offset must *not* be copied: the target object refered | |
1262 | to by TOVAL retains its original dynamic type after assignment. */ | |
1263 | if (TYPE_CODE (type) == TYPE_CODE_PTR) | |
1264 | { | |
1265 | set_value_enclosing_type (val, value_enclosing_type (fromval)); | |
1266 | set_value_pointed_to_offset (val, value_pointed_to_offset (fromval)); | |
1267 | } | |
c5aa993b | 1268 | |
c906108c SS |
1269 | return val; |
1270 | } | |
1271 | ||
1272 | /* Extend a value VAL to COUNT repetitions of its type. */ | |
1273 | ||
f23631e4 AC |
1274 | struct value * |
1275 | value_repeat (struct value *arg1, int count) | |
c906108c | 1276 | { |
f23631e4 | 1277 | struct value *val; |
c906108c SS |
1278 | |
1279 | if (VALUE_LVAL (arg1) != lval_memory) | |
8a3fe4f8 | 1280 | error (_("Only values in memory can be extended with '@'.")); |
c906108c | 1281 | if (count < 1) |
8a3fe4f8 | 1282 | error (_("Invalid number %d of repetitions."), count); |
c906108c | 1283 | |
4754a64e | 1284 | val = allocate_repeat_value (value_enclosing_type (arg1), count); |
c906108c | 1285 | |
c906108c | 1286 | VALUE_LVAL (val) = lval_memory; |
42ae5230 | 1287 | set_value_address (val, value_address (arg1)); |
c906108c | 1288 | |
24e6bcee PA |
1289 | read_value_memory (val, 0, value_stack (val), value_address (val), |
1290 | value_contents_all_raw (val), | |
3ae385af | 1291 | type_length_units (value_enclosing_type (val))); |
24e6bcee | 1292 | |
c906108c SS |
1293 | return val; |
1294 | } | |
1295 | ||
f23631e4 | 1296 | struct value * |
9df2fbc4 | 1297 | value_of_variable (struct symbol *var, const struct block *b) |
c906108c | 1298 | { |
63e43d3a | 1299 | struct frame_info *frame = NULL; |
c906108c | 1300 | |
63e43d3a | 1301 | if (symbol_read_needs_frame (var)) |
61212c0f | 1302 | frame = get_selected_frame (_("No frame selected.")); |
c906108c | 1303 | |
63e43d3a | 1304 | return read_var_value (var, b, frame); |
c906108c SS |
1305 | } |
1306 | ||
61212c0f | 1307 | struct value * |
270140bd | 1308 | address_of_variable (struct symbol *var, const struct block *b) |
61212c0f UW |
1309 | { |
1310 | struct type *type = SYMBOL_TYPE (var); | |
1311 | struct value *val; | |
1312 | ||
1313 | /* Evaluate it first; if the result is a memory address, we're fine. | |
581e13c1 | 1314 | Lazy evaluation pays off here. */ |
61212c0f UW |
1315 | |
1316 | val = value_of_variable (var, b); | |
9f1f738a | 1317 | type = value_type (val); |
61212c0f UW |
1318 | |
1319 | if ((VALUE_LVAL (val) == lval_memory && value_lazy (val)) | |
1320 | || TYPE_CODE (type) == TYPE_CODE_FUNC) | |
1321 | { | |
42ae5230 | 1322 | CORE_ADDR addr = value_address (val); |
a109c7c1 | 1323 | |
61212c0f UW |
1324 | return value_from_pointer (lookup_pointer_type (type), addr); |
1325 | } | |
1326 | ||
1327 | /* Not a memory address; check what the problem was. */ | |
1328 | switch (VALUE_LVAL (val)) | |
1329 | { | |
1330 | case lval_register: | |
1331 | { | |
1332 | struct frame_info *frame; | |
1333 | const char *regname; | |
1334 | ||
41b56feb | 1335 | frame = frame_find_by_id (VALUE_NEXT_FRAME_ID (val)); |
61212c0f UW |
1336 | gdb_assert (frame); |
1337 | ||
1338 | regname = gdbarch_register_name (get_frame_arch (frame), | |
1339 | VALUE_REGNUM (val)); | |
1340 | gdb_assert (regname && *regname); | |
1341 | ||
1342 | error (_("Address requested for identifier " | |
1343 | "\"%s\" which is in register $%s"), | |
1344 | SYMBOL_PRINT_NAME (var), regname); | |
1345 | break; | |
1346 | } | |
1347 | ||
1348 | default: | |
1349 | error (_("Can't take address of \"%s\" which isn't an lvalue."), | |
1350 | SYMBOL_PRINT_NAME (var)); | |
1351 | break; | |
1352 | } | |
1353 | ||
1354 | return val; | |
1355 | } | |
1356 | ||
63092375 DJ |
1357 | /* Return one if VAL does not live in target memory, but should in order |
1358 | to operate on it. Otherwise return zero. */ | |
1359 | ||
1360 | int | |
1361 | value_must_coerce_to_target (struct value *val) | |
1362 | { | |
1363 | struct type *valtype; | |
1364 | ||
1365 | /* The only lval kinds which do not live in target memory. */ | |
1366 | if (VALUE_LVAL (val) != not_lval | |
e81e7f5e SC |
1367 | && VALUE_LVAL (val) != lval_internalvar |
1368 | && VALUE_LVAL (val) != lval_xcallable) | |
63092375 DJ |
1369 | return 0; |
1370 | ||
1371 | valtype = check_typedef (value_type (val)); | |
1372 | ||
1373 | switch (TYPE_CODE (valtype)) | |
1374 | { | |
1375 | case TYPE_CODE_ARRAY: | |
3cbaedff | 1376 | return TYPE_VECTOR (valtype) ? 0 : 1; |
63092375 DJ |
1377 | case TYPE_CODE_STRING: |
1378 | return 1; | |
1379 | default: | |
1380 | return 0; | |
1381 | } | |
1382 | } | |
1383 | ||
3e43a32a MS |
1384 | /* Make sure that VAL lives in target memory if it's supposed to. For |
1385 | instance, strings are constructed as character arrays in GDB's | |
1386 | storage, and this function copies them to the target. */ | |
63092375 DJ |
1387 | |
1388 | struct value * | |
1389 | value_coerce_to_target (struct value *val) | |
1390 | { | |
1391 | LONGEST length; | |
1392 | CORE_ADDR addr; | |
1393 | ||
1394 | if (!value_must_coerce_to_target (val)) | |
1395 | return val; | |
1396 | ||
1397 | length = TYPE_LENGTH (check_typedef (value_type (val))); | |
1398 | addr = allocate_space_in_inferior (length); | |
1399 | write_memory (addr, value_contents (val), length); | |
1400 | return value_at_lazy (value_type (val), addr); | |
1401 | } | |
1402 | ||
ac3eeb49 MS |
1403 | /* Given a value which is an array, return a value which is a pointer |
1404 | to its first element, regardless of whether or not the array has a | |
1405 | nonzero lower bound. | |
c906108c | 1406 | |
ac3eeb49 MS |
1407 | FIXME: A previous comment here indicated that this routine should |
1408 | be substracting the array's lower bound. It's not clear to me that | |
1409 | this is correct. Given an array subscripting operation, it would | |
1410 | certainly work to do the adjustment here, essentially computing: | |
c906108c SS |
1411 | |
1412 | (&array[0] - (lowerbound * sizeof array[0])) + (index * sizeof array[0]) | |
1413 | ||
ac3eeb49 MS |
1414 | However I believe a more appropriate and logical place to account |
1415 | for the lower bound is to do so in value_subscript, essentially | |
1416 | computing: | |
c906108c SS |
1417 | |
1418 | (&array[0] + ((index - lowerbound) * sizeof array[0])) | |
1419 | ||
ac3eeb49 MS |
1420 | As further evidence consider what would happen with operations |
1421 | other than array subscripting, where the caller would get back a | |
1422 | value that had an address somewhere before the actual first element | |
1423 | of the array, and the information about the lower bound would be | |
581e13c1 | 1424 | lost because of the coercion to pointer type. */ |
c906108c | 1425 | |
f23631e4 AC |
1426 | struct value * |
1427 | value_coerce_array (struct value *arg1) | |
c906108c | 1428 | { |
df407dfe | 1429 | struct type *type = check_typedef (value_type (arg1)); |
c906108c | 1430 | |
63092375 DJ |
1431 | /* If the user tries to do something requiring a pointer with an |
1432 | array that has not yet been pushed to the target, then this would | |
1433 | be a good time to do so. */ | |
1434 | arg1 = value_coerce_to_target (arg1); | |
1435 | ||
c906108c | 1436 | if (VALUE_LVAL (arg1) != lval_memory) |
8a3fe4f8 | 1437 | error (_("Attempt to take address of value not located in memory.")); |
c906108c | 1438 | |
4478b372 | 1439 | return value_from_pointer (lookup_pointer_type (TYPE_TARGET_TYPE (type)), |
42ae5230 | 1440 | value_address (arg1)); |
c906108c SS |
1441 | } |
1442 | ||
1443 | /* Given a value which is a function, return a value which is a pointer | |
1444 | to it. */ | |
1445 | ||
f23631e4 AC |
1446 | struct value * |
1447 | value_coerce_function (struct value *arg1) | |
c906108c | 1448 | { |
f23631e4 | 1449 | struct value *retval; |
c906108c SS |
1450 | |
1451 | if (VALUE_LVAL (arg1) != lval_memory) | |
8a3fe4f8 | 1452 | error (_("Attempt to take address of value not located in memory.")); |
c906108c | 1453 | |
df407dfe | 1454 | retval = value_from_pointer (lookup_pointer_type (value_type (arg1)), |
42ae5230 | 1455 | value_address (arg1)); |
c906108c | 1456 | return retval; |
c5aa993b | 1457 | } |
c906108c | 1458 | |
ac3eeb49 MS |
1459 | /* Return a pointer value for the object for which ARG1 is the |
1460 | contents. */ | |
c906108c | 1461 | |
f23631e4 AC |
1462 | struct value * |
1463 | value_addr (struct value *arg1) | |
c906108c | 1464 | { |
f23631e4 | 1465 | struct value *arg2; |
df407dfe | 1466 | struct type *type = check_typedef (value_type (arg1)); |
a109c7c1 | 1467 | |
aa006118 | 1468 | if (TYPE_IS_REFERENCE (type)) |
c906108c | 1469 | { |
3326303b MG |
1470 | if (value_bits_synthetic_pointer (arg1, value_embedded_offset (arg1), |
1471 | TARGET_CHAR_BIT * TYPE_LENGTH (type))) | |
1472 | arg1 = coerce_ref (arg1); | |
1473 | else | |
1474 | { | |
1475 | /* Copy the value, but change the type from (T&) to (T*). We | |
1476 | keep the same location information, which is efficient, and | |
1477 | allows &(&X) to get the location containing the reference. | |
1478 | Do the same to its enclosing type for consistency. */ | |
1479 | struct type *type_ptr | |
1480 | = lookup_pointer_type (TYPE_TARGET_TYPE (type)); | |
1481 | struct type *enclosing_type | |
1482 | = check_typedef (value_enclosing_type (arg1)); | |
1483 | struct type *enclosing_type_ptr | |
1484 | = lookup_pointer_type (TYPE_TARGET_TYPE (enclosing_type)); | |
1485 | ||
1486 | arg2 = value_copy (arg1); | |
1487 | deprecated_set_value_type (arg2, type_ptr); | |
1488 | set_value_enclosing_type (arg2, enclosing_type_ptr); | |
a22df60a | 1489 | |
3326303b MG |
1490 | return arg2; |
1491 | } | |
c906108c SS |
1492 | } |
1493 | if (TYPE_CODE (type) == TYPE_CODE_FUNC) | |
1494 | return value_coerce_function (arg1); | |
1495 | ||
63092375 DJ |
1496 | /* If this is an array that has not yet been pushed to the target, |
1497 | then this would be a good time to force it to memory. */ | |
1498 | arg1 = value_coerce_to_target (arg1); | |
1499 | ||
c906108c | 1500 | if (VALUE_LVAL (arg1) != lval_memory) |
8a3fe4f8 | 1501 | error (_("Attempt to take address of value not located in memory.")); |
c906108c | 1502 | |
581e13c1 | 1503 | /* Get target memory address. */ |
df407dfe | 1504 | arg2 = value_from_pointer (lookup_pointer_type (value_type (arg1)), |
42ae5230 | 1505 | (value_address (arg1) |
13c3b5f5 | 1506 | + value_embedded_offset (arg1))); |
c906108c SS |
1507 | |
1508 | /* This may be a pointer to a base subobject; so remember the | |
ac3eeb49 | 1509 | full derived object's type ... */ |
4dfea560 DE |
1510 | set_value_enclosing_type (arg2, |
1511 | lookup_pointer_type (value_enclosing_type (arg1))); | |
ac3eeb49 MS |
1512 | /* ... and also the relative position of the subobject in the full |
1513 | object. */ | |
b44d461b | 1514 | set_value_pointed_to_offset (arg2, value_embedded_offset (arg1)); |
c906108c SS |
1515 | return arg2; |
1516 | } | |
1517 | ||
ac3eeb49 MS |
1518 | /* Return a reference value for the object for which ARG1 is the |
1519 | contents. */ | |
fb933624 DJ |
1520 | |
1521 | struct value * | |
a65cfae5 | 1522 | value_ref (struct value *arg1, enum type_code refcode) |
fb933624 DJ |
1523 | { |
1524 | struct value *arg2; | |
fb933624 | 1525 | struct type *type = check_typedef (value_type (arg1)); |
a109c7c1 | 1526 | |
a65cfae5 AV |
1527 | gdb_assert (refcode == TYPE_CODE_REF || refcode == TYPE_CODE_RVALUE_REF); |
1528 | ||
1529 | if ((TYPE_CODE (type) == TYPE_CODE_REF | |
1530 | || TYPE_CODE (type) == TYPE_CODE_RVALUE_REF) | |
1531 | && TYPE_CODE (type) == refcode) | |
fb933624 DJ |
1532 | return arg1; |
1533 | ||
1534 | arg2 = value_addr (arg1); | |
a65cfae5 | 1535 | deprecated_set_value_type (arg2, lookup_reference_type (type, refcode)); |
fb933624 DJ |
1536 | return arg2; |
1537 | } | |
1538 | ||
ac3eeb49 MS |
1539 | /* Given a value of a pointer type, apply the C unary * operator to |
1540 | it. */ | |
c906108c | 1541 | |
f23631e4 AC |
1542 | struct value * |
1543 | value_ind (struct value *arg1) | |
c906108c SS |
1544 | { |
1545 | struct type *base_type; | |
f23631e4 | 1546 | struct value *arg2; |
c906108c | 1547 | |
994b9211 | 1548 | arg1 = coerce_array (arg1); |
c906108c | 1549 | |
df407dfe | 1550 | base_type = check_typedef (value_type (arg1)); |
c906108c | 1551 | |
8cf6f0b1 TT |
1552 | if (VALUE_LVAL (arg1) == lval_computed) |
1553 | { | |
c8f2448a | 1554 | const struct lval_funcs *funcs = value_computed_funcs (arg1); |
8cf6f0b1 TT |
1555 | |
1556 | if (funcs->indirect) | |
1557 | { | |
1558 | struct value *result = funcs->indirect (arg1); | |
1559 | ||
1560 | if (result) | |
1561 | return result; | |
1562 | } | |
1563 | } | |
1564 | ||
22fe0fbb | 1565 | if (TYPE_CODE (base_type) == TYPE_CODE_PTR) |
c906108c SS |
1566 | { |
1567 | struct type *enc_type; | |
a109c7c1 | 1568 | |
ac3eeb49 MS |
1569 | /* We may be pointing to something embedded in a larger object. |
1570 | Get the real type of the enclosing object. */ | |
4754a64e | 1571 | enc_type = check_typedef (value_enclosing_type (arg1)); |
c906108c | 1572 | enc_type = TYPE_TARGET_TYPE (enc_type); |
0d5de010 DJ |
1573 | |
1574 | if (TYPE_CODE (check_typedef (enc_type)) == TYPE_CODE_FUNC | |
1575 | || TYPE_CODE (check_typedef (enc_type)) == TYPE_CODE_METHOD) | |
1576 | /* For functions, go through find_function_addr, which knows | |
1577 | how to handle function descriptors. */ | |
ac3eeb49 MS |
1578 | arg2 = value_at_lazy (enc_type, |
1579 | find_function_addr (arg1, NULL)); | |
0d5de010 | 1580 | else |
581e13c1 | 1581 | /* Retrieve the enclosing object pointed to. */ |
ac3eeb49 MS |
1582 | arg2 = value_at_lazy (enc_type, |
1583 | (value_as_address (arg1) | |
1584 | - value_pointed_to_offset (arg1))); | |
0d5de010 | 1585 | |
9f1f738a | 1586 | enc_type = value_type (arg2); |
dfcee124 | 1587 | return readjust_indirect_value_type (arg2, enc_type, base_type, arg1); |
c906108c SS |
1588 | } |
1589 | ||
8a3fe4f8 | 1590 | error (_("Attempt to take contents of a non-pointer value.")); |
ac3eeb49 | 1591 | return 0; /* For lint -- never reached. */ |
c906108c SS |
1592 | } |
1593 | \f | |
39d37385 PA |
1594 | /* Create a value for an array by allocating space in GDB, copying the |
1595 | data into that space, and then setting up an array value. | |
c906108c | 1596 | |
ac3eeb49 MS |
1597 | The array bounds are set from LOWBOUND and HIGHBOUND, and the array |
1598 | is populated from the values passed in ELEMVEC. | |
c906108c SS |
1599 | |
1600 | The element type of the array is inherited from the type of the | |
1601 | first element, and all elements must have the same size (though we | |
ac3eeb49 | 1602 | don't currently enforce any restriction on their types). */ |
c906108c | 1603 | |
f23631e4 AC |
1604 | struct value * |
1605 | value_array (int lowbound, int highbound, struct value **elemvec) | |
c906108c SS |
1606 | { |
1607 | int nelem; | |
1608 | int idx; | |
6b850546 | 1609 | ULONGEST typelength; |
f23631e4 | 1610 | struct value *val; |
c906108c | 1611 | struct type *arraytype; |
c906108c | 1612 | |
ac3eeb49 MS |
1613 | /* Validate that the bounds are reasonable and that each of the |
1614 | elements have the same size. */ | |
c906108c SS |
1615 | |
1616 | nelem = highbound - lowbound + 1; | |
1617 | if (nelem <= 0) | |
1618 | { | |
8a3fe4f8 | 1619 | error (_("bad array bounds (%d, %d)"), lowbound, highbound); |
c906108c | 1620 | } |
3ae385af | 1621 | typelength = type_length_units (value_enclosing_type (elemvec[0])); |
c906108c SS |
1622 | for (idx = 1; idx < nelem; idx++) |
1623 | { | |
3ae385af SM |
1624 | if (type_length_units (value_enclosing_type (elemvec[idx])) |
1625 | != typelength) | |
c906108c | 1626 | { |
8a3fe4f8 | 1627 | error (_("array elements must all be the same size")); |
c906108c SS |
1628 | } |
1629 | } | |
1630 | ||
e3506a9f UW |
1631 | arraytype = lookup_array_range_type (value_enclosing_type (elemvec[0]), |
1632 | lowbound, highbound); | |
c906108c SS |
1633 | |
1634 | if (!current_language->c_style_arrays) | |
1635 | { | |
1636 | val = allocate_value (arraytype); | |
1637 | for (idx = 0; idx < nelem; idx++) | |
39d37385 PA |
1638 | value_contents_copy (val, idx * typelength, elemvec[idx], 0, |
1639 | typelength); | |
c906108c SS |
1640 | return val; |
1641 | } | |
1642 | ||
63092375 DJ |
1643 | /* Allocate space to store the array, and then initialize it by |
1644 | copying in each element. */ | |
c906108c | 1645 | |
63092375 | 1646 | val = allocate_value (arraytype); |
c906108c | 1647 | for (idx = 0; idx < nelem; idx++) |
39d37385 | 1648 | value_contents_copy (val, idx * typelength, elemvec[idx], 0, typelength); |
63092375 | 1649 | return val; |
c906108c SS |
1650 | } |
1651 | ||
6c7a06a3 | 1652 | struct value * |
e3a3797e | 1653 | value_cstring (const char *ptr, ssize_t len, struct type *char_type) |
6c7a06a3 TT |
1654 | { |
1655 | struct value *val; | |
1656 | int lowbound = current_language->string_lower_bound; | |
63375b74 | 1657 | ssize_t highbound = len / TYPE_LENGTH (char_type); |
6c7a06a3 | 1658 | struct type *stringtype |
e3506a9f | 1659 | = lookup_array_range_type (char_type, lowbound, highbound + lowbound - 1); |
6c7a06a3 TT |
1660 | |
1661 | val = allocate_value (stringtype); | |
1662 | memcpy (value_contents_raw (val), ptr, len); | |
1663 | return val; | |
1664 | } | |
1665 | ||
ac3eeb49 MS |
1666 | /* Create a value for a string constant by allocating space in the |
1667 | inferior, copying the data into that space, and returning the | |
1668 | address with type TYPE_CODE_STRING. PTR points to the string | |
1669 | constant data; LEN is number of characters. | |
1670 | ||
1671 | Note that string types are like array of char types with a lower | |
1672 | bound of zero and an upper bound of LEN - 1. Also note that the | |
1673 | string may contain embedded null bytes. */ | |
c906108c | 1674 | |
f23631e4 | 1675 | struct value * |
7cc3f8e2 | 1676 | value_string (const char *ptr, ssize_t len, struct type *char_type) |
c906108c | 1677 | { |
f23631e4 | 1678 | struct value *val; |
c906108c | 1679 | int lowbound = current_language->string_lower_bound; |
63375b74 | 1680 | ssize_t highbound = len / TYPE_LENGTH (char_type); |
c906108c | 1681 | struct type *stringtype |
e3506a9f | 1682 | = lookup_string_range_type (char_type, lowbound, highbound + lowbound - 1); |
c906108c | 1683 | |
3b7538c0 UW |
1684 | val = allocate_value (stringtype); |
1685 | memcpy (value_contents_raw (val), ptr, len); | |
1686 | return val; | |
c906108c SS |
1687 | } |
1688 | ||
c906108c | 1689 | \f |
ac3eeb49 MS |
1690 | /* See if we can pass arguments in T2 to a function which takes |
1691 | arguments of types T1. T1 is a list of NARGS arguments, and T2 is | |
1692 | a NULL-terminated vector. If some arguments need coercion of some | |
1693 | sort, then the coerced values are written into T2. Return value is | |
1694 | 0 if the arguments could be matched, or the position at which they | |
1695 | differ if not. | |
c906108c | 1696 | |
ac3eeb49 MS |
1697 | STATICP is nonzero if the T1 argument list came from a static |
1698 | member function. T2 will still include the ``this'' pointer, but | |
1699 | it will be skipped. | |
c906108c SS |
1700 | |
1701 | For non-static member functions, we ignore the first argument, | |
ac3eeb49 MS |
1702 | which is the type of the instance variable. This is because we |
1703 | want to handle calls with objects from derived classes. This is | |
1704 | not entirely correct: we should actually check to make sure that a | |
c906108c SS |
1705 | requested operation is type secure, shouldn't we? FIXME. */ |
1706 | ||
1707 | static int | |
ad2f7632 DJ |
1708 | typecmp (int staticp, int varargs, int nargs, |
1709 | struct field t1[], struct value *t2[]) | |
c906108c SS |
1710 | { |
1711 | int i; | |
1712 | ||
1713 | if (t2 == 0) | |
ac3eeb49 MS |
1714 | internal_error (__FILE__, __LINE__, |
1715 | _("typecmp: no argument list")); | |
ad2f7632 | 1716 | |
ac3eeb49 MS |
1717 | /* Skip ``this'' argument if applicable. T2 will always include |
1718 | THIS. */ | |
4a1970e4 | 1719 | if (staticp) |
ad2f7632 DJ |
1720 | t2 ++; |
1721 | ||
1722 | for (i = 0; | |
1723 | (i < nargs) && TYPE_CODE (t1[i].type) != TYPE_CODE_VOID; | |
1724 | i++) | |
c906108c | 1725 | { |
c5aa993b | 1726 | struct type *tt1, *tt2; |
ad2f7632 | 1727 | |
c5aa993b JM |
1728 | if (!t2[i]) |
1729 | return i + 1; | |
ad2f7632 DJ |
1730 | |
1731 | tt1 = check_typedef (t1[i].type); | |
df407dfe | 1732 | tt2 = check_typedef (value_type (t2[i])); |
ad2f7632 | 1733 | |
aa006118 | 1734 | if (TYPE_IS_REFERENCE (tt1) |
8301c89e | 1735 | /* We should be doing hairy argument matching, as below. */ |
3e43a32a MS |
1736 | && (TYPE_CODE (check_typedef (TYPE_TARGET_TYPE (tt1))) |
1737 | == TYPE_CODE (tt2))) | |
c906108c SS |
1738 | { |
1739 | if (TYPE_CODE (tt2) == TYPE_CODE_ARRAY) | |
1740 | t2[i] = value_coerce_array (t2[i]); | |
1741 | else | |
a65cfae5 | 1742 | t2[i] = value_ref (t2[i], TYPE_CODE (tt1)); |
c906108c SS |
1743 | continue; |
1744 | } | |
1745 | ||
802db21b DB |
1746 | /* djb - 20000715 - Until the new type structure is in the |
1747 | place, and we can attempt things like implicit conversions, | |
1748 | we need to do this so you can take something like a map<const | |
1749 | char *>, and properly access map["hello"], because the | |
1750 | argument to [] will be a reference to a pointer to a char, | |
ac3eeb49 | 1751 | and the argument will be a pointer to a char. */ |
aa006118 | 1752 | while (TYPE_IS_REFERENCE (tt1) || TYPE_CODE (tt1) == TYPE_CODE_PTR) |
802db21b DB |
1753 | { |
1754 | tt1 = check_typedef( TYPE_TARGET_TYPE(tt1) ); | |
1755 | } | |
ac3eeb49 MS |
1756 | while (TYPE_CODE(tt2) == TYPE_CODE_ARRAY |
1757 | || TYPE_CODE(tt2) == TYPE_CODE_PTR | |
aa006118 | 1758 | || TYPE_IS_REFERENCE (tt2)) |
c906108c | 1759 | { |
ac3eeb49 | 1760 | tt2 = check_typedef (TYPE_TARGET_TYPE(tt2)); |
c906108c | 1761 | } |
c5aa993b JM |
1762 | if (TYPE_CODE (tt1) == TYPE_CODE (tt2)) |
1763 | continue; | |
ac3eeb49 MS |
1764 | /* Array to pointer is a `trivial conversion' according to the |
1765 | ARM. */ | |
c906108c | 1766 | |
ac3eeb49 MS |
1767 | /* We should be doing much hairier argument matching (see |
1768 | section 13.2 of the ARM), but as a quick kludge, just check | |
1769 | for the same type code. */ | |
df407dfe | 1770 | if (TYPE_CODE (t1[i].type) != TYPE_CODE (value_type (t2[i]))) |
c5aa993b | 1771 | return i + 1; |
c906108c | 1772 | } |
ad2f7632 | 1773 | if (varargs || t2[i] == NULL) |
c5aa993b | 1774 | return 0; |
ad2f7632 | 1775 | return i + 1; |
c906108c SS |
1776 | } |
1777 | ||
b1af9e97 TT |
1778 | /* Helper class for do_search_struct_field that updates *RESULT_PTR |
1779 | and *LAST_BOFFSET, and possibly throws an exception if the field | |
1780 | search has yielded ambiguous results. */ | |
c906108c | 1781 | |
b1af9e97 TT |
1782 | static void |
1783 | update_search_result (struct value **result_ptr, struct value *v, | |
6b850546 | 1784 | LONGEST *last_boffset, LONGEST boffset, |
b1af9e97 TT |
1785 | const char *name, struct type *type) |
1786 | { | |
1787 | if (v != NULL) | |
1788 | { | |
1789 | if (*result_ptr != NULL | |
1790 | /* The result is not ambiguous if all the classes that are | |
1791 | found occupy the same space. */ | |
1792 | && *last_boffset != boffset) | |
1793 | error (_("base class '%s' is ambiguous in type '%s'"), | |
1794 | name, TYPE_SAFE_NAME (type)); | |
1795 | *result_ptr = v; | |
1796 | *last_boffset = boffset; | |
1797 | } | |
1798 | } | |
c906108c | 1799 | |
b1af9e97 TT |
1800 | /* A helper for search_struct_field. This does all the work; most |
1801 | arguments are as passed to search_struct_field. The result is | |
1802 | stored in *RESULT_PTR, which must be initialized to NULL. | |
1803 | OUTERMOST_TYPE is the type of the initial type passed to | |
1804 | search_struct_field; this is used for error reporting when the | |
1805 | lookup is ambiguous. */ | |
1806 | ||
1807 | static void | |
6b850546 | 1808 | do_search_struct_field (const char *name, struct value *arg1, LONGEST offset, |
b1af9e97 TT |
1809 | struct type *type, int looking_for_baseclass, |
1810 | struct value **result_ptr, | |
6b850546 | 1811 | LONGEST *last_boffset, |
b1af9e97 | 1812 | struct type *outermost_type) |
c906108c SS |
1813 | { |
1814 | int i; | |
edf3d5f3 | 1815 | int nbases; |
c906108c | 1816 | |
f168693b | 1817 | type = check_typedef (type); |
edf3d5f3 | 1818 | nbases = TYPE_N_BASECLASSES (type); |
c906108c | 1819 | |
c5aa993b | 1820 | if (!looking_for_baseclass) |
c906108c SS |
1821 | for (i = TYPE_NFIELDS (type) - 1; i >= nbases; i--) |
1822 | { | |
0d5cff50 | 1823 | const char *t_field_name = TYPE_FIELD_NAME (type, i); |
c906108c | 1824 | |
db577aea | 1825 | if (t_field_name && (strcmp_iw (t_field_name, name) == 0)) |
c906108c | 1826 | { |
f23631e4 | 1827 | struct value *v; |
a109c7c1 | 1828 | |
d6a843b5 | 1829 | if (field_is_static (&TYPE_FIELD (type, i))) |
686d4def | 1830 | v = value_static_field (type, i); |
c906108c | 1831 | else |
b1af9e97 TT |
1832 | v = value_primitive_field (arg1, offset, i, type); |
1833 | *result_ptr = v; | |
1834 | return; | |
c906108c SS |
1835 | } |
1836 | ||
1837 | if (t_field_name | |
47c6ee49 | 1838 | && t_field_name[0] == '\0') |
c906108c SS |
1839 | { |
1840 | struct type *field_type = TYPE_FIELD_TYPE (type, i); | |
a109c7c1 | 1841 | |
c906108c SS |
1842 | if (TYPE_CODE (field_type) == TYPE_CODE_UNION |
1843 | || TYPE_CODE (field_type) == TYPE_CODE_STRUCT) | |
1844 | { | |
ac3eeb49 MS |
1845 | /* Look for a match through the fields of an anonymous |
1846 | union, or anonymous struct. C++ provides anonymous | |
1847 | unions. | |
c906108c | 1848 | |
1b831c93 AC |
1849 | In the GNU Chill (now deleted from GDB) |
1850 | implementation of variant record types, each | |
1851 | <alternative field> has an (anonymous) union type, | |
1852 | each member of the union represents a <variant | |
1853 | alternative>. Each <variant alternative> is | |
1854 | represented as a struct, with a member for each | |
1855 | <variant field>. */ | |
c5aa993b | 1856 | |
b1af9e97 | 1857 | struct value *v = NULL; |
6b850546 | 1858 | LONGEST new_offset = offset; |
c906108c | 1859 | |
db034ac5 AC |
1860 | /* This is pretty gross. In G++, the offset in an |
1861 | anonymous union is relative to the beginning of the | |
1b831c93 AC |
1862 | enclosing struct. In the GNU Chill (now deleted |
1863 | from GDB) implementation of variant records, the | |
1864 | bitpos is zero in an anonymous union field, so we | |
ac3eeb49 | 1865 | have to add the offset of the union here. */ |
c906108c SS |
1866 | if (TYPE_CODE (field_type) == TYPE_CODE_STRUCT |
1867 | || (TYPE_NFIELDS (field_type) > 0 | |
1868 | && TYPE_FIELD_BITPOS (field_type, 0) == 0)) | |
1869 | new_offset += TYPE_FIELD_BITPOS (type, i) / 8; | |
1870 | ||
b1af9e97 TT |
1871 | do_search_struct_field (name, arg1, new_offset, |
1872 | field_type, | |
1873 | looking_for_baseclass, &v, | |
1874 | last_boffset, | |
1875 | outermost_type); | |
c906108c | 1876 | if (v) |
b1af9e97 TT |
1877 | { |
1878 | *result_ptr = v; | |
1879 | return; | |
1880 | } | |
c906108c SS |
1881 | } |
1882 | } | |
1883 | } | |
1884 | ||
c5aa993b | 1885 | for (i = 0; i < nbases; i++) |
c906108c | 1886 | { |
b1af9e97 | 1887 | struct value *v = NULL; |
c906108c | 1888 | struct type *basetype = check_typedef (TYPE_BASECLASS (type, i)); |
ac3eeb49 MS |
1889 | /* If we are looking for baseclasses, this is what we get when |
1890 | we hit them. But it could happen that the base part's member | |
1891 | name is not yet filled in. */ | |
c906108c SS |
1892 | int found_baseclass = (looking_for_baseclass |
1893 | && TYPE_BASECLASS_NAME (type, i) != NULL | |
ac3eeb49 MS |
1894 | && (strcmp_iw (name, |
1895 | TYPE_BASECLASS_NAME (type, | |
1896 | i)) == 0)); | |
6b850546 | 1897 | LONGEST boffset = value_embedded_offset (arg1) + offset; |
c906108c SS |
1898 | |
1899 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
1900 | { | |
3e3d7139 | 1901 | struct value *v2; |
c906108c SS |
1902 | |
1903 | boffset = baseclass_offset (type, i, | |
8af8e3bc PA |
1904 | value_contents_for_printing (arg1), |
1905 | value_embedded_offset (arg1) + offset, | |
1906 | value_address (arg1), | |
1907 | arg1); | |
c906108c | 1908 | |
ac3eeb49 | 1909 | /* The virtual base class pointer might have been clobbered |
581e13c1 | 1910 | by the user program. Make sure that it still points to a |
ac3eeb49 | 1911 | valid memory location. */ |
c906108c | 1912 | |
1a334831 TT |
1913 | boffset += value_embedded_offset (arg1) + offset; |
1914 | if (boffset < 0 | |
1915 | || boffset >= TYPE_LENGTH (value_enclosing_type (arg1))) | |
c906108c SS |
1916 | { |
1917 | CORE_ADDR base_addr; | |
c5aa993b | 1918 | |
42ae5230 | 1919 | base_addr = value_address (arg1) + boffset; |
08039c9e | 1920 | v2 = value_at_lazy (basetype, base_addr); |
ac3eeb49 MS |
1921 | if (target_read_memory (base_addr, |
1922 | value_contents_raw (v2), | |
acc900c2 | 1923 | TYPE_LENGTH (value_type (v2))) != 0) |
8a3fe4f8 | 1924 | error (_("virtual baseclass botch")); |
c906108c SS |
1925 | } |
1926 | else | |
1927 | { | |
1a334831 TT |
1928 | v2 = value_copy (arg1); |
1929 | deprecated_set_value_type (v2, basetype); | |
1930 | set_value_embedded_offset (v2, boffset); | |
c906108c SS |
1931 | } |
1932 | ||
1933 | if (found_baseclass) | |
b1af9e97 TT |
1934 | v = v2; |
1935 | else | |
1936 | { | |
1937 | do_search_struct_field (name, v2, 0, | |
1938 | TYPE_BASECLASS (type, i), | |
1939 | looking_for_baseclass, | |
1940 | result_ptr, last_boffset, | |
1941 | outermost_type); | |
1942 | } | |
c906108c SS |
1943 | } |
1944 | else if (found_baseclass) | |
1945 | v = value_primitive_field (arg1, offset, i, type); | |
1946 | else | |
b1af9e97 TT |
1947 | { |
1948 | do_search_struct_field (name, arg1, | |
1949 | offset + TYPE_BASECLASS_BITPOS (type, | |
1950 | i) / 8, | |
1951 | basetype, looking_for_baseclass, | |
1952 | result_ptr, last_boffset, | |
1953 | outermost_type); | |
1954 | } | |
1955 | ||
1956 | update_search_result (result_ptr, v, last_boffset, | |
1957 | boffset, name, outermost_type); | |
c906108c | 1958 | } |
b1af9e97 TT |
1959 | } |
1960 | ||
1961 | /* Helper function used by value_struct_elt to recurse through | |
8a13d42d SM |
1962 | baseclasses. Look for a field NAME in ARG1. Search in it assuming |
1963 | it has (class) type TYPE. If found, return value, else return NULL. | |
b1af9e97 TT |
1964 | |
1965 | If LOOKING_FOR_BASECLASS, then instead of looking for struct | |
1966 | fields, look for a baseclass named NAME. */ | |
1967 | ||
1968 | static struct value * | |
8a13d42d | 1969 | search_struct_field (const char *name, struct value *arg1, |
b1af9e97 TT |
1970 | struct type *type, int looking_for_baseclass) |
1971 | { | |
1972 | struct value *result = NULL; | |
6b850546 | 1973 | LONGEST boffset = 0; |
b1af9e97 | 1974 | |
8a13d42d | 1975 | do_search_struct_field (name, arg1, 0, type, looking_for_baseclass, |
b1af9e97 TT |
1976 | &result, &boffset, type); |
1977 | return result; | |
c906108c SS |
1978 | } |
1979 | ||
ac3eeb49 | 1980 | /* Helper function used by value_struct_elt to recurse through |
581e13c1 | 1981 | baseclasses. Look for a field NAME in ARG1. Adjust the address of |
ac3eeb49 MS |
1982 | ARG1 by OFFSET bytes, and search in it assuming it has (class) type |
1983 | TYPE. | |
1984 | ||
1985 | If found, return value, else if name matched and args not return | |
1986 | (value) -1, else return NULL. */ | |
c906108c | 1987 | |
f23631e4 | 1988 | static struct value * |
714f19d5 | 1989 | search_struct_method (const char *name, struct value **arg1p, |
6b850546 | 1990 | struct value **args, LONGEST offset, |
aa1ee363 | 1991 | int *static_memfuncp, struct type *type) |
c906108c SS |
1992 | { |
1993 | int i; | |
f23631e4 | 1994 | struct value *v; |
c906108c SS |
1995 | int name_matched = 0; |
1996 | char dem_opname[64]; | |
1997 | ||
f168693b | 1998 | type = check_typedef (type); |
c906108c SS |
1999 | for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; i--) |
2000 | { | |
0d5cff50 | 2001 | const char *t_field_name = TYPE_FN_FIELDLIST_NAME (type, i); |
a109c7c1 | 2002 | |
581e13c1 | 2003 | /* FIXME! May need to check for ARM demangling here. */ |
61012eef GB |
2004 | if (startswith (t_field_name, "__") || |
2005 | startswith (t_field_name, "op") || | |
2006 | startswith (t_field_name, "type")) | |
c906108c | 2007 | { |
c5aa993b JM |
2008 | if (cplus_demangle_opname (t_field_name, dem_opname, DMGL_ANSI)) |
2009 | t_field_name = dem_opname; | |
2010 | else if (cplus_demangle_opname (t_field_name, dem_opname, 0)) | |
c906108c | 2011 | t_field_name = dem_opname; |
c906108c | 2012 | } |
db577aea | 2013 | if (t_field_name && (strcmp_iw (t_field_name, name) == 0)) |
c906108c SS |
2014 | { |
2015 | int j = TYPE_FN_FIELDLIST_LENGTH (type, i) - 1; | |
2016 | struct fn_field *f = TYPE_FN_FIELDLIST1 (type, i); | |
c906108c | 2017 | |
a109c7c1 | 2018 | name_matched = 1; |
de17c821 | 2019 | check_stub_method_group (type, i); |
c906108c | 2020 | if (j > 0 && args == 0) |
3e43a32a MS |
2021 | error (_("cannot resolve overloaded method " |
2022 | "`%s': no arguments supplied"), name); | |
acf5ed49 | 2023 | else if (j == 0 && args == 0) |
c906108c | 2024 | { |
acf5ed49 DJ |
2025 | v = value_fn_field (arg1p, f, j, type, offset); |
2026 | if (v != NULL) | |
2027 | return v; | |
c906108c | 2028 | } |
acf5ed49 DJ |
2029 | else |
2030 | while (j >= 0) | |
2031 | { | |
acf5ed49 | 2032 | if (!typecmp (TYPE_FN_FIELD_STATIC_P (f, j), |
ad2f7632 DJ |
2033 | TYPE_VARARGS (TYPE_FN_FIELD_TYPE (f, j)), |
2034 | TYPE_NFIELDS (TYPE_FN_FIELD_TYPE (f, j)), | |
acf5ed49 DJ |
2035 | TYPE_FN_FIELD_ARGS (f, j), args)) |
2036 | { | |
2037 | if (TYPE_FN_FIELD_VIRTUAL_P (f, j)) | |
ac3eeb49 MS |
2038 | return value_virtual_fn_field (arg1p, f, j, |
2039 | type, offset); | |
2040 | if (TYPE_FN_FIELD_STATIC_P (f, j) | |
2041 | && static_memfuncp) | |
acf5ed49 DJ |
2042 | *static_memfuncp = 1; |
2043 | v = value_fn_field (arg1p, f, j, type, offset); | |
2044 | if (v != NULL) | |
2045 | return v; | |
2046 | } | |
2047 | j--; | |
2048 | } | |
c906108c SS |
2049 | } |
2050 | } | |
2051 | ||
2052 | for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--) | |
2053 | { | |
6b850546 DT |
2054 | LONGEST base_offset; |
2055 | LONGEST this_offset; | |
c906108c SS |
2056 | |
2057 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
2058 | { | |
086280be | 2059 | struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i)); |
8af8e3bc | 2060 | struct value *base_val; |
086280be UW |
2061 | const gdb_byte *base_valaddr; |
2062 | ||
2063 | /* The virtual base class pointer might have been | |
581e13c1 | 2064 | clobbered by the user program. Make sure that it |
8301c89e | 2065 | still points to a valid memory location. */ |
086280be UW |
2066 | |
2067 | if (offset < 0 || offset >= TYPE_LENGTH (type)) | |
c5aa993b | 2068 | { |
6c18f3e0 SP |
2069 | CORE_ADDR address; |
2070 | ||
26fcd5d7 | 2071 | gdb::byte_vector tmp (TYPE_LENGTH (baseclass)); |
6c18f3e0 | 2072 | address = value_address (*arg1p); |
a109c7c1 | 2073 | |
8af8e3bc | 2074 | if (target_read_memory (address + offset, |
26fcd5d7 | 2075 | tmp.data (), TYPE_LENGTH (baseclass)) != 0) |
086280be | 2076 | error (_("virtual baseclass botch")); |
8af8e3bc PA |
2077 | |
2078 | base_val = value_from_contents_and_address (baseclass, | |
26fcd5d7 | 2079 | tmp.data (), |
8af8e3bc PA |
2080 | address + offset); |
2081 | base_valaddr = value_contents_for_printing (base_val); | |
2082 | this_offset = 0; | |
c5aa993b JM |
2083 | } |
2084 | else | |
8af8e3bc PA |
2085 | { |
2086 | base_val = *arg1p; | |
2087 | base_valaddr = value_contents_for_printing (*arg1p); | |
2088 | this_offset = offset; | |
2089 | } | |
c5aa993b | 2090 | |
086280be | 2091 | base_offset = baseclass_offset (type, i, base_valaddr, |
8af8e3bc PA |
2092 | this_offset, value_address (base_val), |
2093 | base_val); | |
c5aa993b | 2094 | } |
c906108c SS |
2095 | else |
2096 | { | |
2097 | base_offset = TYPE_BASECLASS_BITPOS (type, i) / 8; | |
c5aa993b | 2098 | } |
c906108c SS |
2099 | v = search_struct_method (name, arg1p, args, base_offset + offset, |
2100 | static_memfuncp, TYPE_BASECLASS (type, i)); | |
f23631e4 | 2101 | if (v == (struct value *) - 1) |
c906108c SS |
2102 | { |
2103 | name_matched = 1; | |
2104 | } | |
2105 | else if (v) | |
2106 | { | |
ac3eeb49 MS |
2107 | /* FIXME-bothner: Why is this commented out? Why is it here? */ |
2108 | /* *arg1p = arg1_tmp; */ | |
c906108c | 2109 | return v; |
c5aa993b | 2110 | } |
c906108c | 2111 | } |
c5aa993b | 2112 | if (name_matched) |
f23631e4 | 2113 | return (struct value *) - 1; |
c5aa993b JM |
2114 | else |
2115 | return NULL; | |
c906108c SS |
2116 | } |
2117 | ||
2118 | /* Given *ARGP, a value of type (pointer to a)* structure/union, | |
ac3eeb49 MS |
2119 | extract the component named NAME from the ultimate target |
2120 | structure/union and return it as a value with its appropriate type. | |
c906108c SS |
2121 | ERR is used in the error message if *ARGP's type is wrong. |
2122 | ||
2123 | C++: ARGS is a list of argument types to aid in the selection of | |
581e13c1 | 2124 | an appropriate method. Also, handle derived types. |
c906108c SS |
2125 | |
2126 | STATIC_MEMFUNCP, if non-NULL, points to a caller-supplied location | |
2127 | where the truthvalue of whether the function that was resolved was | |
2128 | a static member function or not is stored. | |
2129 | ||
ac3eeb49 MS |
2130 | ERR is an error message to be printed in case the field is not |
2131 | found. */ | |
c906108c | 2132 | |
f23631e4 AC |
2133 | struct value * |
2134 | value_struct_elt (struct value **argp, struct value **args, | |
714f19d5 | 2135 | const char *name, int *static_memfuncp, const char *err) |
c906108c | 2136 | { |
52f0bd74 | 2137 | struct type *t; |
f23631e4 | 2138 | struct value *v; |
c906108c | 2139 | |
994b9211 | 2140 | *argp = coerce_array (*argp); |
c906108c | 2141 | |
df407dfe | 2142 | t = check_typedef (value_type (*argp)); |
c906108c SS |
2143 | |
2144 | /* Follow pointers until we get to a non-pointer. */ | |
2145 | ||
aa006118 | 2146 | while (TYPE_CODE (t) == TYPE_CODE_PTR || TYPE_IS_REFERENCE (t)) |
c906108c SS |
2147 | { |
2148 | *argp = value_ind (*argp); | |
2149 | /* Don't coerce fn pointer to fn and then back again! */ | |
b846d303 | 2150 | if (TYPE_CODE (check_typedef (value_type (*argp))) != TYPE_CODE_FUNC) |
994b9211 | 2151 | *argp = coerce_array (*argp); |
df407dfe | 2152 | t = check_typedef (value_type (*argp)); |
c906108c SS |
2153 | } |
2154 | ||
c5aa993b | 2155 | if (TYPE_CODE (t) != TYPE_CODE_STRUCT |
c906108c | 2156 | && TYPE_CODE (t) != TYPE_CODE_UNION) |
3e43a32a MS |
2157 | error (_("Attempt to extract a component of a value that is not a %s."), |
2158 | err); | |
c906108c SS |
2159 | |
2160 | /* Assume it's not, unless we see that it is. */ | |
2161 | if (static_memfuncp) | |
c5aa993b | 2162 | *static_memfuncp = 0; |
c906108c SS |
2163 | |
2164 | if (!args) | |
2165 | { | |
2166 | /* if there are no arguments ...do this... */ | |
2167 | ||
ac3eeb49 MS |
2168 | /* Try as a field first, because if we succeed, there is less |
2169 | work to be done. */ | |
8a13d42d | 2170 | v = search_struct_field (name, *argp, t, 0); |
c906108c SS |
2171 | if (v) |
2172 | return v; | |
2173 | ||
2174 | /* C++: If it was not found as a data field, then try to | |
7b83ea04 | 2175 | return it as a pointer to a method. */ |
ac3eeb49 MS |
2176 | v = search_struct_method (name, argp, args, 0, |
2177 | static_memfuncp, t); | |
c906108c | 2178 | |
f23631e4 | 2179 | if (v == (struct value *) - 1) |
55b39184 | 2180 | error (_("Cannot take address of method %s."), name); |
c906108c SS |
2181 | else if (v == 0) |
2182 | { | |
2183 | if (TYPE_NFN_FIELDS (t)) | |
8a3fe4f8 | 2184 | error (_("There is no member or method named %s."), name); |
c906108c | 2185 | else |
8a3fe4f8 | 2186 | error (_("There is no member named %s."), name); |
c906108c SS |
2187 | } |
2188 | return v; | |
2189 | } | |
2190 | ||
8301c89e DE |
2191 | v = search_struct_method (name, argp, args, 0, |
2192 | static_memfuncp, t); | |
7168a814 | 2193 | |
f23631e4 | 2194 | if (v == (struct value *) - 1) |
c906108c | 2195 | { |
3e43a32a MS |
2196 | error (_("One of the arguments you tried to pass to %s could not " |
2197 | "be converted to what the function wants."), name); | |
c906108c SS |
2198 | } |
2199 | else if (v == 0) | |
2200 | { | |
ac3eeb49 MS |
2201 | /* See if user tried to invoke data as function. If so, hand it |
2202 | back. If it's not callable (i.e., a pointer to function), | |
7b83ea04 | 2203 | gdb should give an error. */ |
8a13d42d | 2204 | v = search_struct_field (name, *argp, t, 0); |
fa8de41e TT |
2205 | /* If we found an ordinary field, then it is not a method call. |
2206 | So, treat it as if it were a static member function. */ | |
2207 | if (v && static_memfuncp) | |
2208 | *static_memfuncp = 1; | |
c906108c SS |
2209 | } |
2210 | ||
2211 | if (!v) | |
79afc5ef SW |
2212 | throw_error (NOT_FOUND_ERROR, |
2213 | _("Structure has no component named %s."), name); | |
c906108c SS |
2214 | return v; |
2215 | } | |
2216 | ||
b5b08fb4 SC |
2217 | /* Given *ARGP, a value of type structure or union, or a pointer/reference |
2218 | to a structure or union, extract and return its component (field) of | |
2219 | type FTYPE at the specified BITPOS. | |
2220 | Throw an exception on error. */ | |
2221 | ||
2222 | struct value * | |
2223 | value_struct_elt_bitpos (struct value **argp, int bitpos, struct type *ftype, | |
2224 | const char *err) | |
2225 | { | |
2226 | struct type *t; | |
b5b08fb4 | 2227 | int i; |
b5b08fb4 SC |
2228 | |
2229 | *argp = coerce_array (*argp); | |
2230 | ||
2231 | t = check_typedef (value_type (*argp)); | |
2232 | ||
aa006118 | 2233 | while (TYPE_CODE (t) == TYPE_CODE_PTR || TYPE_IS_REFERENCE (t)) |
b5b08fb4 SC |
2234 | { |
2235 | *argp = value_ind (*argp); | |
2236 | if (TYPE_CODE (check_typedef (value_type (*argp))) != TYPE_CODE_FUNC) | |
2237 | *argp = coerce_array (*argp); | |
2238 | t = check_typedef (value_type (*argp)); | |
2239 | } | |
2240 | ||
2241 | if (TYPE_CODE (t) != TYPE_CODE_STRUCT | |
2242 | && TYPE_CODE (t) != TYPE_CODE_UNION) | |
2243 | error (_("Attempt to extract a component of a value that is not a %s."), | |
2244 | err); | |
2245 | ||
2246 | for (i = TYPE_N_BASECLASSES (t); i < TYPE_NFIELDS (t); i++) | |
2247 | { | |
2248 | if (!field_is_static (&TYPE_FIELD (t, i)) | |
2249 | && bitpos == TYPE_FIELD_BITPOS (t, i) | |
2250 | && types_equal (ftype, TYPE_FIELD_TYPE (t, i))) | |
2251 | return value_primitive_field (*argp, 0, i, t); | |
2252 | } | |
2253 | ||
2254 | error (_("No field with matching bitpos and type.")); | |
2255 | ||
2256 | /* Never hit. */ | |
2257 | return NULL; | |
2258 | } | |
2259 | ||
ac3eeb49 | 2260 | /* Search through the methods of an object (and its bases) to find a |
233e8b28 SC |
2261 | specified method. Return the pointer to the fn_field list FN_LIST of |
2262 | overloaded instances defined in the source language. If available | |
2263 | and matching, a vector of matching xmethods defined in extension | |
2264 | languages are also returned in XM_WORKER_VEC | |
ac3eeb49 MS |
2265 | |
2266 | Helper function for value_find_oload_list. | |
2267 | ARGP is a pointer to a pointer to a value (the object). | |
2268 | METHOD is a string containing the method name. | |
2269 | OFFSET is the offset within the value. | |
2270 | TYPE is the assumed type of the object. | |
233e8b28 SC |
2271 | FN_LIST is the pointer to matching overloaded instances defined in |
2272 | source language. Since this is a recursive function, *FN_LIST | |
2273 | should be set to NULL when calling this function. | |
2274 | NUM_FNS is the number of overloaded instances. *NUM_FNS should be set to | |
2275 | 0 when calling this function. | |
2276 | XM_WORKER_VEC is the vector of matching xmethod workers. *XM_WORKER_VEC | |
2277 | should also be set to NULL when calling this function. | |
ac3eeb49 MS |
2278 | BASETYPE is set to the actual type of the subobject where the |
2279 | method is found. | |
581e13c1 | 2280 | BOFFSET is the offset of the base subobject where the method is found. */ |
c906108c | 2281 | |
233e8b28 | 2282 | static void |
714f19d5 | 2283 | find_method_list (struct value **argp, const char *method, |
6b850546 | 2284 | LONGEST offset, struct type *type, |
233e8b28 | 2285 | struct fn_field **fn_list, int *num_fns, |
ba18742c | 2286 | std::vector<xmethod_worker_up> *xm_worker_vec, |
6b850546 | 2287 | struct type **basetype, LONGEST *boffset) |
c906108c SS |
2288 | { |
2289 | int i; | |
233e8b28 | 2290 | struct fn_field *f = NULL; |
c906108c | 2291 | |
233e8b28 | 2292 | gdb_assert (fn_list != NULL && xm_worker_vec != NULL); |
f168693b | 2293 | type = check_typedef (type); |
c906108c | 2294 | |
233e8b28 SC |
2295 | /* First check in object itself. |
2296 | This function is called recursively to search through base classes. | |
2297 | If there is a source method match found at some stage, then we need not | |
2298 | look for source methods in consequent recursive calls. */ | |
2299 | if ((*fn_list) == NULL) | |
c906108c | 2300 | { |
233e8b28 | 2301 | for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; i--) |
c5aa993b | 2302 | { |
233e8b28 SC |
2303 | /* pai: FIXME What about operators and type conversions? */ |
2304 | const char *fn_field_name = TYPE_FN_FIELDLIST_NAME (type, i); | |
2305 | ||
2306 | if (fn_field_name && (strcmp_iw (fn_field_name, method) == 0)) | |
2307 | { | |
2308 | int len = TYPE_FN_FIELDLIST_LENGTH (type, i); | |
2309 | f = TYPE_FN_FIELDLIST1 (type, i); | |
2310 | *fn_list = f; | |
4a1970e4 | 2311 | |
233e8b28 SC |
2312 | *num_fns = len; |
2313 | *basetype = type; | |
2314 | *boffset = offset; | |
4a1970e4 | 2315 | |
233e8b28 SC |
2316 | /* Resolve any stub methods. */ |
2317 | check_stub_method_group (type, i); | |
4a1970e4 | 2318 | |
233e8b28 SC |
2319 | break; |
2320 | } | |
c5aa993b JM |
2321 | } |
2322 | } | |
2323 | ||
233e8b28 SC |
2324 | /* Unlike source methods, xmethods can be accumulated over successive |
2325 | recursive calls. In other words, an xmethod named 'm' in a class | |
2326 | will not hide an xmethod named 'm' in its base class(es). We want | |
2327 | it to be this way because xmethods are after all convenience functions | |
2328 | and hence there is no point restricting them with something like method | |
2329 | hiding. Moreover, if hiding is done for xmethods as well, then we will | |
2330 | have to provide a mechanism to un-hide (like the 'using' construct). */ | |
ba18742c | 2331 | get_matching_xmethod_workers (type, method, xm_worker_vec); |
233e8b28 SC |
2332 | |
2333 | /* If source methods are not found in current class, look for them in the | |
2334 | base classes. We also have to go through the base classes to gather | |
2335 | extension methods. */ | |
c906108c SS |
2336 | for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--) |
2337 | { | |
6b850546 | 2338 | LONGEST base_offset; |
a109c7c1 | 2339 | |
c906108c SS |
2340 | if (BASETYPE_VIA_VIRTUAL (type, i)) |
2341 | { | |
086280be | 2342 | base_offset = baseclass_offset (type, i, |
8af8e3bc PA |
2343 | value_contents_for_printing (*argp), |
2344 | value_offset (*argp) + offset, | |
2345 | value_address (*argp), *argp); | |
c5aa993b | 2346 | } |
ac3eeb49 MS |
2347 | else /* Non-virtual base, simply use bit position from debug |
2348 | info. */ | |
c906108c SS |
2349 | { |
2350 | base_offset = TYPE_BASECLASS_BITPOS (type, i) / 8; | |
c5aa993b | 2351 | } |
233e8b28 SC |
2352 | |
2353 | find_method_list (argp, method, base_offset + offset, | |
2354 | TYPE_BASECLASS (type, i), fn_list, num_fns, | |
2355 | xm_worker_vec, basetype, boffset); | |
c906108c | 2356 | } |
c906108c SS |
2357 | } |
2358 | ||
233e8b28 SC |
2359 | /* Return the list of overloaded methods of a specified name. The methods |
2360 | could be those GDB finds in the binary, or xmethod. Methods found in | |
2361 | the binary are returned in FN_LIST, and xmethods are returned in | |
2362 | XM_WORKER_VEC. | |
ac3eeb49 MS |
2363 | |
2364 | ARGP is a pointer to a pointer to a value (the object). | |
2365 | METHOD is the method name. | |
2366 | OFFSET is the offset within the value contents. | |
233e8b28 SC |
2367 | FN_LIST is the pointer to matching overloaded instances defined in |
2368 | source language. | |
ac3eeb49 | 2369 | NUM_FNS is the number of overloaded instances. |
233e8b28 SC |
2370 | XM_WORKER_VEC is the vector of matching xmethod workers defined in |
2371 | extension languages. | |
ac3eeb49 MS |
2372 | BASETYPE is set to the type of the base subobject that defines the |
2373 | method. | |
581e13c1 | 2374 | BOFFSET is the offset of the base subobject which defines the method. */ |
c906108c | 2375 | |
233e8b28 | 2376 | static void |
714f19d5 | 2377 | value_find_oload_method_list (struct value **argp, const char *method, |
6b850546 | 2378 | LONGEST offset, struct fn_field **fn_list, |
233e8b28 | 2379 | int *num_fns, |
ba18742c | 2380 | std::vector<xmethod_worker_up> *xm_worker_vec, |
6b850546 | 2381 | struct type **basetype, LONGEST *boffset) |
c906108c | 2382 | { |
c5aa993b | 2383 | struct type *t; |
c906108c | 2384 | |
df407dfe | 2385 | t = check_typedef (value_type (*argp)); |
c906108c | 2386 | |
ac3eeb49 | 2387 | /* Code snarfed from value_struct_elt. */ |
aa006118 | 2388 | while (TYPE_CODE (t) == TYPE_CODE_PTR || TYPE_IS_REFERENCE (t)) |
c906108c SS |
2389 | { |
2390 | *argp = value_ind (*argp); | |
2391 | /* Don't coerce fn pointer to fn and then back again! */ | |
b846d303 | 2392 | if (TYPE_CODE (check_typedef (value_type (*argp))) != TYPE_CODE_FUNC) |
994b9211 | 2393 | *argp = coerce_array (*argp); |
df407dfe | 2394 | t = check_typedef (value_type (*argp)); |
c906108c | 2395 | } |
c5aa993b | 2396 | |
c5aa993b JM |
2397 | if (TYPE_CODE (t) != TYPE_CODE_STRUCT |
2398 | && TYPE_CODE (t) != TYPE_CODE_UNION) | |
3e43a32a MS |
2399 | error (_("Attempt to extract a component of a " |
2400 | "value that is not a struct or union")); | |
c5aa993b | 2401 | |
233e8b28 SC |
2402 | gdb_assert (fn_list != NULL && xm_worker_vec != NULL); |
2403 | ||
2404 | /* Clear the lists. */ | |
2405 | *fn_list = NULL; | |
2406 | *num_fns = 0; | |
ba18742c | 2407 | xm_worker_vec->clear (); |
233e8b28 SC |
2408 | |
2409 | find_method_list (argp, method, 0, t, fn_list, num_fns, xm_worker_vec, | |
2410 | basetype, boffset); | |
c906108c SS |
2411 | } |
2412 | ||
da096638 | 2413 | /* Given an array of arguments (ARGS) (which includes an |
c906108c | 2414 | entry for "this" in the case of C++ methods), the number of |
28c64fc2 SCR |
2415 | arguments NARGS, the NAME of a function, and whether it's a method or |
2416 | not (METHOD), find the best function that matches on the argument types | |
2417 | according to the overload resolution rules. | |
c906108c | 2418 | |
4c3376c8 SW |
2419 | METHOD can be one of three values: |
2420 | NON_METHOD for non-member functions. | |
2421 | METHOD: for member functions. | |
2422 | BOTH: used for overload resolution of operators where the | |
2423 | candidates are expected to be either member or non member | |
581e13c1 | 2424 | functions. In this case the first argument ARGTYPES |
4c3376c8 SW |
2425 | (representing 'this') is expected to be a reference to the |
2426 | target object, and will be dereferenced when attempting the | |
2427 | non-member search. | |
2428 | ||
c906108c SS |
2429 | In the case of class methods, the parameter OBJ is an object value |
2430 | in which to search for overloaded methods. | |
2431 | ||
2432 | In the case of non-method functions, the parameter FSYM is a symbol | |
2433 | corresponding to one of the overloaded functions. | |
2434 | ||
2435 | Return value is an integer: 0 -> good match, 10 -> debugger applied | |
2436 | non-standard coercions, 100 -> incompatible. | |
2437 | ||
2438 | If a method is being searched for, VALP will hold the value. | |
ac3eeb49 MS |
2439 | If a non-method is being searched for, SYMP will hold the symbol |
2440 | for it. | |
c906108c SS |
2441 | |
2442 | If a method is being searched for, and it is a static method, | |
2443 | then STATICP will point to a non-zero value. | |
2444 | ||
7322dca9 SW |
2445 | If NO_ADL argument dependent lookup is disabled. This is used to prevent |
2446 | ADL overload candidates when performing overload resolution for a fully | |
2447 | qualified name. | |
2448 | ||
e66d4446 SC |
2449 | If NOSIDE is EVAL_AVOID_SIDE_EFFECTS, then OBJP's memory cannot be |
2450 | read while picking the best overload match (it may be all zeroes and thus | |
2451 | not have a vtable pointer), in which case skip virtual function lookup. | |
2452 | This is ok as typically EVAL_AVOID_SIDE_EFFECTS is only used to determine | |
2453 | the result type. | |
2454 | ||
c906108c SS |
2455 | Note: This function does *not* check the value of |
2456 | overload_resolution. Caller must check it to see whether overload | |
581e13c1 | 2457 | resolution is permitted. */ |
c906108c SS |
2458 | |
2459 | int | |
da096638 | 2460 | find_overload_match (struct value **args, int nargs, |
4c3376c8 | 2461 | const char *name, enum oload_search_type method, |
28c64fc2 | 2462 | struct value **objp, struct symbol *fsym, |
ac3eeb49 | 2463 | struct value **valp, struct symbol **symp, |
e66d4446 SC |
2464 | int *staticp, const int no_adl, |
2465 | const enum noside noside) | |
c906108c | 2466 | { |
7f8c9282 | 2467 | struct value *obj = (objp ? *objp : NULL); |
da096638 | 2468 | struct type *obj_type = obj ? value_type (obj) : NULL; |
ac3eeb49 | 2469 | /* Index of best overloaded function. */ |
4c3376c8 SW |
2470 | int func_oload_champ = -1; |
2471 | int method_oload_champ = -1; | |
233e8b28 SC |
2472 | int src_method_oload_champ = -1; |
2473 | int ext_method_oload_champ = -1; | |
4c3376c8 | 2474 | |
ac3eeb49 | 2475 | /* The measure for the current best match. */ |
4c3376c8 SW |
2476 | struct badness_vector *method_badness = NULL; |
2477 | struct badness_vector *func_badness = NULL; | |
233e8b28 SC |
2478 | struct badness_vector *ext_method_badness = NULL; |
2479 | struct badness_vector *src_method_badness = NULL; | |
4c3376c8 | 2480 | |
f23631e4 | 2481 | struct value *temp = obj; |
ac3eeb49 MS |
2482 | /* For methods, the list of overloaded methods. */ |
2483 | struct fn_field *fns_ptr = NULL; | |
2484 | /* For non-methods, the list of overloaded function symbols. */ | |
2485 | struct symbol **oload_syms = NULL; | |
ba18742c SM |
2486 | /* For xmethods, the vector of xmethod workers. */ |
2487 | std::vector<xmethod_worker_up> xm_worker_vec; | |
ac3eeb49 MS |
2488 | /* Number of overloaded instances being considered. */ |
2489 | int num_fns = 0; | |
c5aa993b | 2490 | struct type *basetype = NULL; |
6b850546 | 2491 | LONGEST boffset; |
7322dca9 SW |
2492 | |
2493 | struct cleanup *all_cleanups = make_cleanup (null_cleanup, NULL); | |
c906108c | 2494 | |
8d577d32 | 2495 | const char *obj_type_name = NULL; |
7322dca9 | 2496 | const char *func_name = NULL; |
8d577d32 | 2497 | enum oload_classification match_quality; |
4c3376c8 | 2498 | enum oload_classification method_match_quality = INCOMPATIBLE; |
233e8b28 SC |
2499 | enum oload_classification src_method_match_quality = INCOMPATIBLE; |
2500 | enum oload_classification ext_method_match_quality = INCOMPATIBLE; | |
4c3376c8 | 2501 | enum oload_classification func_match_quality = INCOMPATIBLE; |
c906108c | 2502 | |
ac3eeb49 | 2503 | /* Get the list of overloaded methods or functions. */ |
4c3376c8 | 2504 | if (method == METHOD || method == BOTH) |
c906108c | 2505 | { |
a2ca50ae | 2506 | gdb_assert (obj); |
94af9270 KS |
2507 | |
2508 | /* OBJ may be a pointer value rather than the object itself. */ | |
2509 | obj = coerce_ref (obj); | |
2510 | while (TYPE_CODE (check_typedef (value_type (obj))) == TYPE_CODE_PTR) | |
2511 | obj = coerce_ref (value_ind (obj)); | |
df407dfe | 2512 | obj_type_name = TYPE_NAME (value_type (obj)); |
94af9270 KS |
2513 | |
2514 | /* First check whether this is a data member, e.g. a pointer to | |
2515 | a function. */ | |
2516 | if (TYPE_CODE (check_typedef (value_type (obj))) == TYPE_CODE_STRUCT) | |
2517 | { | |
8a13d42d | 2518 | *valp = search_struct_field (name, obj, |
94af9270 KS |
2519 | check_typedef (value_type (obj)), 0); |
2520 | if (*valp) | |
2521 | { | |
2522 | *staticp = 1; | |
f748fb40 | 2523 | do_cleanups (all_cleanups); |
94af9270 KS |
2524 | return 0; |
2525 | } | |
2526 | } | |
c906108c | 2527 | |
4c3376c8 | 2528 | /* Retrieve the list of methods with the name NAME. */ |
233e8b28 SC |
2529 | value_find_oload_method_list (&temp, name, 0, &fns_ptr, &num_fns, |
2530 | &xm_worker_vec, &basetype, &boffset); | |
4c3376c8 | 2531 | /* If this is a method only search, and no methods were found |
ba18742c SM |
2532 | the search has failed. */ |
2533 | if (method == METHOD && (!fns_ptr || !num_fns) && xm_worker_vec.empty ()) | |
8a3fe4f8 | 2534 | error (_("Couldn't find method %s%s%s"), |
c5aa993b JM |
2535 | obj_type_name, |
2536 | (obj_type_name && *obj_type_name) ? "::" : "", | |
2537 | name); | |
4a1970e4 | 2538 | /* If we are dealing with stub method types, they should have |
ac3eeb49 MS |
2539 | been resolved by find_method_list via |
2540 | value_find_oload_method_list above. */ | |
4c3376c8 SW |
2541 | if (fns_ptr) |
2542 | { | |
4bfb94b8 | 2543 | gdb_assert (TYPE_SELF_TYPE (fns_ptr[0].type) != NULL); |
4c3376c8 | 2544 | |
233e8b28 SC |
2545 | src_method_oload_champ = find_oload_champ (args, nargs, |
2546 | num_fns, fns_ptr, NULL, | |
2547 | NULL, &src_method_badness); | |
2548 | ||
2549 | src_method_match_quality = classify_oload_match | |
2550 | (src_method_badness, nargs, | |
2551 | oload_method_static_p (fns_ptr, src_method_oload_champ)); | |
2552 | ||
2553 | make_cleanup (xfree, src_method_badness); | |
2554 | } | |
4c3376c8 | 2555 | |
ba18742c | 2556 | if (!xm_worker_vec.empty ()) |
233e8b28 SC |
2557 | { |
2558 | ext_method_oload_champ = find_oload_champ (args, nargs, | |
ba18742c | 2559 | 0, NULL, &xm_worker_vec, |
233e8b28 SC |
2560 | NULL, &ext_method_badness); |
2561 | ext_method_match_quality = classify_oload_match (ext_method_badness, | |
2562 | nargs, 0); | |
2563 | make_cleanup (xfree, ext_method_badness); | |
4c3376c8 SW |
2564 | } |
2565 | ||
233e8b28 SC |
2566 | if (src_method_oload_champ >= 0 && ext_method_oload_champ >= 0) |
2567 | { | |
2568 | switch (compare_badness (ext_method_badness, src_method_badness)) | |
2569 | { | |
2570 | case 0: /* Src method and xmethod are equally good. */ | |
233e8b28 SC |
2571 | /* If src method and xmethod are equally good, then |
2572 | xmethod should be the winner. Hence, fall through to the | |
2573 | case where a xmethod is better than the source | |
2574 | method, except when the xmethod match quality is | |
2575 | non-standard. */ | |
2576 | /* FALLTHROUGH */ | |
2577 | case 1: /* Src method and ext method are incompatible. */ | |
2578 | /* If ext method match is not standard, then let source method | |
2579 | win. Otherwise, fallthrough to let xmethod win. */ | |
2580 | if (ext_method_match_quality != STANDARD) | |
2581 | { | |
2582 | method_oload_champ = src_method_oload_champ; | |
2583 | method_badness = src_method_badness; | |
2584 | ext_method_oload_champ = -1; | |
2585 | method_match_quality = src_method_match_quality; | |
2586 | break; | |
2587 | } | |
2588 | /* FALLTHROUGH */ | |
2589 | case 2: /* Ext method is champion. */ | |
2590 | method_oload_champ = ext_method_oload_champ; | |
2591 | method_badness = ext_method_badness; | |
2592 | src_method_oload_champ = -1; | |
2593 | method_match_quality = ext_method_match_quality; | |
2594 | break; | |
2595 | case 3: /* Src method is champion. */ | |
2596 | method_oload_champ = src_method_oload_champ; | |
2597 | method_badness = src_method_badness; | |
2598 | ext_method_oload_champ = -1; | |
2599 | method_match_quality = src_method_match_quality; | |
2600 | break; | |
2601 | default: | |
2602 | gdb_assert_not_reached ("Unexpected overload comparison " | |
2603 | "result"); | |
2604 | break; | |
2605 | } | |
2606 | } | |
2607 | else if (src_method_oload_champ >= 0) | |
2608 | { | |
2609 | method_oload_champ = src_method_oload_champ; | |
2610 | method_badness = src_method_badness; | |
2611 | method_match_quality = src_method_match_quality; | |
2612 | } | |
2613 | else if (ext_method_oload_champ >= 0) | |
2614 | { | |
2615 | method_oload_champ = ext_method_oload_champ; | |
2616 | method_badness = ext_method_badness; | |
2617 | method_match_quality = ext_method_match_quality; | |
2618 | } | |
c906108c | 2619 | } |
4c3376c8 SW |
2620 | |
2621 | if (method == NON_METHOD || method == BOTH) | |
c906108c | 2622 | { |
7322dca9 | 2623 | const char *qualified_name = NULL; |
c906108c | 2624 | |
b021a221 MS |
2625 | /* If the overload match is being search for both as a method |
2626 | and non member function, the first argument must now be | |
2627 | dereferenced. */ | |
4c3376c8 | 2628 | if (method == BOTH) |
2b214ea6 | 2629 | args[0] = value_ind (args[0]); |
4c3376c8 | 2630 | |
7322dca9 SW |
2631 | if (fsym) |
2632 | { | |
2633 | qualified_name = SYMBOL_NATURAL_NAME (fsym); | |
2634 | ||
2635 | /* If we have a function with a C++ name, try to extract just | |
2636 | the function part. Do not try this for non-functions (e.g. | |
2637 | function pointers). */ | |
2638 | if (qualified_name | |
3e43a32a MS |
2639 | && TYPE_CODE (check_typedef (SYMBOL_TYPE (fsym))) |
2640 | == TYPE_CODE_FUNC) | |
7322dca9 SW |
2641 | { |
2642 | char *temp; | |
2643 | ||
2644 | temp = cp_func_name (qualified_name); | |
2645 | ||
2646 | /* If cp_func_name did not remove anything, the name of the | |
2647 | symbol did not include scope or argument types - it was | |
2648 | probably a C-style function. */ | |
2649 | if (temp) | |
2650 | { | |
2651 | make_cleanup (xfree, temp); | |
2652 | if (strcmp (temp, qualified_name) == 0) | |
2653 | func_name = NULL; | |
2654 | else | |
2655 | func_name = temp; | |
2656 | } | |
2657 | } | |
2658 | } | |
2659 | else | |
94af9270 | 2660 | { |
7322dca9 SW |
2661 | func_name = name; |
2662 | qualified_name = name; | |
94af9270 | 2663 | } |
d9639e13 | 2664 | |
94af9270 KS |
2665 | /* If there was no C++ name, this must be a C-style function or |
2666 | not a function at all. Just return the same symbol. Do the | |
2667 | same if cp_func_name fails for some reason. */ | |
8d577d32 | 2668 | if (func_name == NULL) |
7b83ea04 | 2669 | { |
917317f4 | 2670 | *symp = fsym; |
5fe41fbf | 2671 | do_cleanups (all_cleanups); |
7b83ea04 AC |
2672 | return 0; |
2673 | } | |
917317f4 | 2674 | |
da096638 | 2675 | func_oload_champ = find_oload_champ_namespace (args, nargs, |
4c3376c8 SW |
2676 | func_name, |
2677 | qualified_name, | |
2678 | &oload_syms, | |
2679 | &func_badness, | |
2680 | no_adl); | |
8d577d32 | 2681 | |
4c3376c8 SW |
2682 | if (func_oload_champ >= 0) |
2683 | func_match_quality = classify_oload_match (func_badness, nargs, 0); | |
2684 | ||
2685 | make_cleanup (xfree, oload_syms); | |
2686 | make_cleanup (xfree, func_badness); | |
8d577d32 DC |
2687 | } |
2688 | ||
7322dca9 | 2689 | /* Did we find a match ? */ |
4c3376c8 | 2690 | if (method_oload_champ == -1 && func_oload_champ == -1) |
79afc5ef SW |
2691 | throw_error (NOT_FOUND_ERROR, |
2692 | _("No symbol \"%s\" in current context."), | |
2693 | name); | |
8d577d32 | 2694 | |
4c3376c8 SW |
2695 | /* If we have found both a method match and a function |
2696 | match, find out which one is better, and calculate match | |
2697 | quality. */ | |
2698 | if (method_oload_champ >= 0 && func_oload_champ >= 0) | |
2699 | { | |
2700 | switch (compare_badness (func_badness, method_badness)) | |
2701 | { | |
2702 | case 0: /* Top two contenders are equally good. */ | |
b021a221 MS |
2703 | /* FIXME: GDB does not support the general ambiguous case. |
2704 | All candidates should be collected and presented the | |
2705 | user. */ | |
4c3376c8 SW |
2706 | error (_("Ambiguous overload resolution")); |
2707 | break; | |
2708 | case 1: /* Incomparable top contenders. */ | |
2709 | /* This is an error incompatible candidates | |
2710 | should not have been proposed. */ | |
3e43a32a MS |
2711 | error (_("Internal error: incompatible " |
2712 | "overload candidates proposed")); | |
4c3376c8 SW |
2713 | break; |
2714 | case 2: /* Function champion. */ | |
2715 | method_oload_champ = -1; | |
2716 | match_quality = func_match_quality; | |
2717 | break; | |
2718 | case 3: /* Method champion. */ | |
2719 | func_oload_champ = -1; | |
2720 | match_quality = method_match_quality; | |
2721 | break; | |
2722 | default: | |
2723 | error (_("Internal error: unexpected overload comparison result")); | |
2724 | break; | |
2725 | } | |
2726 | } | |
2727 | else | |
2728 | { | |
2729 | /* We have either a method match or a function match. */ | |
2730 | if (method_oload_champ >= 0) | |
2731 | match_quality = method_match_quality; | |
2732 | else | |
2733 | match_quality = func_match_quality; | |
2734 | } | |
8d577d32 DC |
2735 | |
2736 | if (match_quality == INCOMPATIBLE) | |
2737 | { | |
4c3376c8 | 2738 | if (method == METHOD) |
8a3fe4f8 | 2739 | error (_("Cannot resolve method %s%s%s to any overloaded instance"), |
8d577d32 DC |
2740 | obj_type_name, |
2741 | (obj_type_name && *obj_type_name) ? "::" : "", | |
2742 | name); | |
2743 | else | |
8a3fe4f8 | 2744 | error (_("Cannot resolve function %s to any overloaded instance"), |
8d577d32 DC |
2745 | func_name); |
2746 | } | |
2747 | else if (match_quality == NON_STANDARD) | |
2748 | { | |
4c3376c8 | 2749 | if (method == METHOD) |
3e43a32a MS |
2750 | warning (_("Using non-standard conversion to match " |
2751 | "method %s%s%s to supplied arguments"), | |
8d577d32 DC |
2752 | obj_type_name, |
2753 | (obj_type_name && *obj_type_name) ? "::" : "", | |
2754 | name); | |
2755 | else | |
3e43a32a MS |
2756 | warning (_("Using non-standard conversion to match " |
2757 | "function %s to supplied arguments"), | |
8d577d32 DC |
2758 | func_name); |
2759 | } | |
2760 | ||
4c3376c8 | 2761 | if (staticp != NULL) |
2bca57ba | 2762 | *staticp = oload_method_static_p (fns_ptr, method_oload_champ); |
4c3376c8 SW |
2763 | |
2764 | if (method_oload_champ >= 0) | |
8d577d32 | 2765 | { |
233e8b28 SC |
2766 | if (src_method_oload_champ >= 0) |
2767 | { | |
e66d4446 SC |
2768 | if (TYPE_FN_FIELD_VIRTUAL_P (fns_ptr, method_oload_champ) |
2769 | && noside != EVAL_AVOID_SIDE_EFFECTS) | |
2770 | { | |
2771 | *valp = value_virtual_fn_field (&temp, fns_ptr, | |
2772 | method_oload_champ, basetype, | |
2773 | boffset); | |
2774 | } | |
233e8b28 SC |
2775 | else |
2776 | *valp = value_fn_field (&temp, fns_ptr, method_oload_champ, | |
2777 | basetype, boffset); | |
2778 | } | |
8d577d32 | 2779 | else |
ba18742c | 2780 | *valp = value_from_xmethod |
f979c73f | 2781 | (std::move (xm_worker_vec[ext_method_oload_champ])); |
8d577d32 DC |
2782 | } |
2783 | else | |
4c3376c8 | 2784 | *symp = oload_syms[func_oload_champ]; |
8d577d32 DC |
2785 | |
2786 | if (objp) | |
2787 | { | |
a4295225 | 2788 | struct type *temp_type = check_typedef (value_type (temp)); |
da096638 | 2789 | struct type *objtype = check_typedef (obj_type); |
a109c7c1 | 2790 | |
a4295225 | 2791 | if (TYPE_CODE (temp_type) != TYPE_CODE_PTR |
da096638 | 2792 | && (TYPE_CODE (objtype) == TYPE_CODE_PTR |
aa006118 | 2793 | || TYPE_IS_REFERENCE (objtype))) |
8d577d32 DC |
2794 | { |
2795 | temp = value_addr (temp); | |
2796 | } | |
2797 | *objp = temp; | |
2798 | } | |
7322dca9 SW |
2799 | |
2800 | do_cleanups (all_cleanups); | |
8d577d32 DC |
2801 | |
2802 | switch (match_quality) | |
2803 | { | |
2804 | case INCOMPATIBLE: | |
2805 | return 100; | |
2806 | case NON_STANDARD: | |
2807 | return 10; | |
2808 | default: /* STANDARD */ | |
2809 | return 0; | |
2810 | } | |
2811 | } | |
2812 | ||
2813 | /* Find the best overload match, searching for FUNC_NAME in namespaces | |
2814 | contained in QUALIFIED_NAME until it either finds a good match or | |
2815 | runs out of namespaces. It stores the overloaded functions in | |
2816 | *OLOAD_SYMS, and the badness vector in *OLOAD_CHAMP_BV. The | |
2817 | calling function is responsible for freeing *OLOAD_SYMS and | |
7322dca9 SW |
2818 | *OLOAD_CHAMP_BV. If NO_ADL, argument dependent lookup is not |
2819 | performned. */ | |
8d577d32 DC |
2820 | |
2821 | static int | |
da096638 | 2822 | find_oload_champ_namespace (struct value **args, int nargs, |
8d577d32 DC |
2823 | const char *func_name, |
2824 | const char *qualified_name, | |
2825 | struct symbol ***oload_syms, | |
7322dca9 SW |
2826 | struct badness_vector **oload_champ_bv, |
2827 | const int no_adl) | |
8d577d32 DC |
2828 | { |
2829 | int oload_champ; | |
2830 | ||
da096638 | 2831 | find_oload_champ_namespace_loop (args, nargs, |
8d577d32 DC |
2832 | func_name, |
2833 | qualified_name, 0, | |
2834 | oload_syms, oload_champ_bv, | |
7322dca9 SW |
2835 | &oload_champ, |
2836 | no_adl); | |
8d577d32 DC |
2837 | |
2838 | return oload_champ; | |
2839 | } | |
2840 | ||
2841 | /* Helper function for find_oload_champ_namespace; NAMESPACE_LEN is | |
2842 | how deep we've looked for namespaces, and the champ is stored in | |
2843 | OLOAD_CHAMP. The return value is 1 if the champ is a good one, 0 | |
7322dca9 SW |
2844 | if it isn't. Other arguments are the same as in |
2845 | find_oload_champ_namespace | |
8d577d32 DC |
2846 | |
2847 | It is the caller's responsibility to free *OLOAD_SYMS and | |
2848 | *OLOAD_CHAMP_BV. */ | |
2849 | ||
2850 | static int | |
da096638 | 2851 | find_oload_champ_namespace_loop (struct value **args, int nargs, |
8d577d32 DC |
2852 | const char *func_name, |
2853 | const char *qualified_name, | |
2854 | int namespace_len, | |
2855 | struct symbol ***oload_syms, | |
2856 | struct badness_vector **oload_champ_bv, | |
7322dca9 SW |
2857 | int *oload_champ, |
2858 | const int no_adl) | |
8d577d32 DC |
2859 | { |
2860 | int next_namespace_len = namespace_len; | |
2861 | int searched_deeper = 0; | |
2862 | int num_fns = 0; | |
2863 | struct cleanup *old_cleanups; | |
2864 | int new_oload_champ; | |
2865 | struct symbol **new_oload_syms; | |
2866 | struct badness_vector *new_oload_champ_bv; | |
2867 | char *new_namespace; | |
2868 | ||
2869 | if (next_namespace_len != 0) | |
2870 | { | |
2871 | gdb_assert (qualified_name[next_namespace_len] == ':'); | |
2872 | next_namespace_len += 2; | |
c906108c | 2873 | } |
ac3eeb49 MS |
2874 | next_namespace_len += |
2875 | cp_find_first_component (qualified_name + next_namespace_len); | |
8d577d32 DC |
2876 | |
2877 | /* Initialize these to values that can safely be xfree'd. */ | |
2878 | *oload_syms = NULL; | |
2879 | *oload_champ_bv = NULL; | |
c5aa993b | 2880 | |
581e13c1 | 2881 | /* First, see if we have a deeper namespace we can search in. |
ac3eeb49 | 2882 | If we get a good match there, use it. */ |
8d577d32 DC |
2883 | |
2884 | if (qualified_name[next_namespace_len] == ':') | |
2885 | { | |
2886 | searched_deeper = 1; | |
2887 | ||
da096638 | 2888 | if (find_oload_champ_namespace_loop (args, nargs, |
8d577d32 DC |
2889 | func_name, qualified_name, |
2890 | next_namespace_len, | |
2891 | oload_syms, oload_champ_bv, | |
7322dca9 | 2892 | oload_champ, no_adl)) |
8d577d32 DC |
2893 | { |
2894 | return 1; | |
2895 | } | |
2896 | }; | |
2897 | ||
2898 | /* If we reach here, either we're in the deepest namespace or we | |
2899 | didn't find a good match in a deeper namespace. But, in the | |
2900 | latter case, we still have a bad match in a deeper namespace; | |
2901 | note that we might not find any match at all in the current | |
2902 | namespace. (There's always a match in the deepest namespace, | |
2903 | because this overload mechanism only gets called if there's a | |
2904 | function symbol to start off with.) */ | |
2905 | ||
2906 | old_cleanups = make_cleanup (xfree, *oload_syms); | |
ec322823 | 2907 | make_cleanup (xfree, *oload_champ_bv); |
224c3ddb | 2908 | new_namespace = (char *) alloca (namespace_len + 1); |
8d577d32 DC |
2909 | strncpy (new_namespace, qualified_name, namespace_len); |
2910 | new_namespace[namespace_len] = '\0'; | |
2911 | new_oload_syms = make_symbol_overload_list (func_name, | |
2912 | new_namespace); | |
7322dca9 SW |
2913 | |
2914 | /* If we have reached the deepest level perform argument | |
2915 | determined lookup. */ | |
2916 | if (!searched_deeper && !no_adl) | |
da096638 KS |
2917 | { |
2918 | int ix; | |
2919 | struct type **arg_types; | |
2920 | ||
2921 | /* Prepare list of argument types for overload resolution. */ | |
2922 | arg_types = (struct type **) | |
2923 | alloca (nargs * (sizeof (struct type *))); | |
2924 | for (ix = 0; ix < nargs; ix++) | |
2925 | arg_types[ix] = value_type (args[ix]); | |
2926 | make_symbol_overload_list_adl (arg_types, nargs, func_name); | |
2927 | } | |
7322dca9 | 2928 | |
8d577d32 DC |
2929 | while (new_oload_syms[num_fns]) |
2930 | ++num_fns; | |
2931 | ||
9cf95373 | 2932 | new_oload_champ = find_oload_champ (args, nargs, num_fns, |
233e8b28 | 2933 | NULL, NULL, new_oload_syms, |
8d577d32 DC |
2934 | &new_oload_champ_bv); |
2935 | ||
2936 | /* Case 1: We found a good match. Free earlier matches (if any), | |
2937 | and return it. Case 2: We didn't find a good match, but we're | |
2938 | not the deepest function. Then go with the bad match that the | |
2939 | deeper function found. Case 3: We found a bad match, and we're | |
2940 | the deepest function. Then return what we found, even though | |
2941 | it's a bad match. */ | |
2942 | ||
2943 | if (new_oload_champ != -1 | |
2944 | && classify_oload_match (new_oload_champ_bv, nargs, 0) == STANDARD) | |
2945 | { | |
2946 | *oload_syms = new_oload_syms; | |
2947 | *oload_champ = new_oload_champ; | |
2948 | *oload_champ_bv = new_oload_champ_bv; | |
2949 | do_cleanups (old_cleanups); | |
2950 | return 1; | |
2951 | } | |
2952 | else if (searched_deeper) | |
2953 | { | |
2954 | xfree (new_oload_syms); | |
2955 | xfree (new_oload_champ_bv); | |
2956 | discard_cleanups (old_cleanups); | |
2957 | return 0; | |
2958 | } | |
2959 | else | |
2960 | { | |
8d577d32 DC |
2961 | *oload_syms = new_oload_syms; |
2962 | *oload_champ = new_oload_champ; | |
2963 | *oload_champ_bv = new_oload_champ_bv; | |
2a7d6a25 | 2964 | do_cleanups (old_cleanups); |
8d577d32 DC |
2965 | return 0; |
2966 | } | |
2967 | } | |
2968 | ||
da096638 | 2969 | /* Look for a function to take NARGS args of ARGS. Find |
8d577d32 | 2970 | the best match from among the overloaded methods or functions |
233e8b28 SC |
2971 | given by FNS_PTR or OLOAD_SYMS or XM_WORKER_VEC, respectively. |
2972 | One, and only one of FNS_PTR, OLOAD_SYMS and XM_WORKER_VEC can be | |
2973 | non-NULL. | |
2974 | ||
2975 | If XM_WORKER_VEC is NULL, then the length of the arrays FNS_PTR | |
2976 | or OLOAD_SYMS (whichever is non-NULL) is specified in NUM_FNS. | |
2977 | ||
8d577d32 DC |
2978 | Return the index of the best match; store an indication of the |
2979 | quality of the match in OLOAD_CHAMP_BV. | |
2980 | ||
2981 | It is the caller's responsibility to free *OLOAD_CHAMP_BV. */ | |
2982 | ||
2983 | static int | |
9cf95373 | 2984 | find_oload_champ (struct value **args, int nargs, |
8d577d32 | 2985 | int num_fns, struct fn_field *fns_ptr, |
ba18742c | 2986 | const std::vector<xmethod_worker_up> *xm_worker_vec, |
8d577d32 DC |
2987 | struct symbol **oload_syms, |
2988 | struct badness_vector **oload_champ_bv) | |
2989 | { | |
2990 | int ix; | |
ac3eeb49 MS |
2991 | /* A measure of how good an overloaded instance is. */ |
2992 | struct badness_vector *bv; | |
2993 | /* Index of best overloaded function. */ | |
2994 | int oload_champ = -1; | |
2995 | /* Current ambiguity state for overload resolution. */ | |
2996 | int oload_ambiguous = 0; | |
2997 | /* 0 => no ambiguity, 1 => two good funcs, 2 => incomparable funcs. */ | |
8d577d32 | 2998 | |
9cf95373 | 2999 | /* A champion can be found among methods alone, or among functions |
233e8b28 SC |
3000 | alone, or in xmethods alone, but not in more than one of these |
3001 | groups. */ | |
3002 | gdb_assert ((fns_ptr != NULL) + (oload_syms != NULL) + (xm_worker_vec != NULL) | |
3003 | == 1); | |
9cf95373 | 3004 | |
8d577d32 | 3005 | *oload_champ_bv = NULL; |
c906108c | 3006 | |
ba18742c SM |
3007 | int fn_count = xm_worker_vec != NULL ? xm_worker_vec->size () : num_fns; |
3008 | ||
ac3eeb49 | 3009 | /* Consider each candidate in turn. */ |
233e8b28 | 3010 | for (ix = 0; ix < fn_count; ix++) |
c906108c | 3011 | { |
8d577d32 | 3012 | int jj; |
233e8b28 | 3013 | int static_offset = 0; |
8d577d32 DC |
3014 | int nparms; |
3015 | struct type **parm_types; | |
3016 | ||
233e8b28 | 3017 | if (xm_worker_vec != NULL) |
db577aea | 3018 | { |
ba18742c SM |
3019 | xmethod_worker *worker = (*xm_worker_vec)[ix].get (); |
3020 | parm_types = worker->get_arg_types (&nparms); | |
db577aea AC |
3021 | } |
3022 | else | |
3023 | { | |
233e8b28 SC |
3024 | if (fns_ptr != NULL) |
3025 | { | |
3026 | nparms = TYPE_NFIELDS (TYPE_FN_FIELD_TYPE (fns_ptr, ix)); | |
3027 | static_offset = oload_method_static_p (fns_ptr, ix); | |
3028 | } | |
3029 | else | |
3030 | nparms = TYPE_NFIELDS (SYMBOL_TYPE (oload_syms[ix])); | |
3031 | ||
8d749320 | 3032 | parm_types = XNEWVEC (struct type *, nparms); |
233e8b28 SC |
3033 | for (jj = 0; jj < nparms; jj++) |
3034 | parm_types[jj] = (fns_ptr != NULL | |
3035 | ? (TYPE_FN_FIELD_ARGS (fns_ptr, ix)[jj].type) | |
3036 | : TYPE_FIELD_TYPE (SYMBOL_TYPE (oload_syms[ix]), | |
8301c89e | 3037 | jj)); |
db577aea | 3038 | } |
c906108c | 3039 | |
ac3eeb49 MS |
3040 | /* Compare parameter types to supplied argument types. Skip |
3041 | THIS for static methods. */ | |
3042 | bv = rank_function (parm_types, nparms, | |
da096638 | 3043 | args + static_offset, |
4a1970e4 | 3044 | nargs - static_offset); |
c5aa993b | 3045 | |
8d577d32 | 3046 | if (!*oload_champ_bv) |
c5aa993b | 3047 | { |
8d577d32 | 3048 | *oload_champ_bv = bv; |
c5aa993b | 3049 | oload_champ = 0; |
c5aa993b | 3050 | } |
ac3eeb49 MS |
3051 | else /* See whether current candidate is better or worse than |
3052 | previous best. */ | |
8d577d32 | 3053 | switch (compare_badness (bv, *oload_champ_bv)) |
c5aa993b | 3054 | { |
ac3eeb49 MS |
3055 | case 0: /* Top two contenders are equally good. */ |
3056 | oload_ambiguous = 1; | |
c5aa993b | 3057 | break; |
ac3eeb49 MS |
3058 | case 1: /* Incomparable top contenders. */ |
3059 | oload_ambiguous = 2; | |
c5aa993b | 3060 | break; |
ac3eeb49 MS |
3061 | case 2: /* New champion, record details. */ |
3062 | *oload_champ_bv = bv; | |
c5aa993b JM |
3063 | oload_ambiguous = 0; |
3064 | oload_champ = ix; | |
c5aa993b JM |
3065 | break; |
3066 | case 3: | |
3067 | default: | |
3068 | break; | |
3069 | } | |
b8c9b27d | 3070 | xfree (parm_types); |
6b1ba9a0 ND |
3071 | if (overload_debug) |
3072 | { | |
233e8b28 | 3073 | if (fns_ptr != NULL) |
ac3eeb49 | 3074 | fprintf_filtered (gdb_stderr, |
3e43a32a | 3075 | "Overloaded method instance %s, # of parms %d\n", |
ac3eeb49 | 3076 | fns_ptr[ix].physname, nparms); |
233e8b28 SC |
3077 | else if (xm_worker_vec != NULL) |
3078 | fprintf_filtered (gdb_stderr, | |
3079 | "Xmethod worker, # of parms %d\n", | |
3080 | nparms); | |
6b1ba9a0 | 3081 | else |
ac3eeb49 | 3082 | fprintf_filtered (gdb_stderr, |
3e43a32a MS |
3083 | "Overloaded function instance " |
3084 | "%s # of parms %d\n", | |
ac3eeb49 MS |
3085 | SYMBOL_DEMANGLED_NAME (oload_syms[ix]), |
3086 | nparms); | |
4a1970e4 | 3087 | for (jj = 0; jj < nargs - static_offset; jj++) |
ac3eeb49 MS |
3088 | fprintf_filtered (gdb_stderr, |
3089 | "...Badness @ %d : %d\n", | |
6403aeea | 3090 | jj, bv->rank[jj].rank); |
3e43a32a MS |
3091 | fprintf_filtered (gdb_stderr, "Overload resolution " |
3092 | "champion is %d, ambiguous? %d\n", | |
ac3eeb49 | 3093 | oload_champ, oload_ambiguous); |
6b1ba9a0 | 3094 | } |
c906108c SS |
3095 | } |
3096 | ||
8d577d32 DC |
3097 | return oload_champ; |
3098 | } | |
6b1ba9a0 | 3099 | |
8d577d32 DC |
3100 | /* Return 1 if we're looking at a static method, 0 if we're looking at |
3101 | a non-static method or a function that isn't a method. */ | |
c906108c | 3102 | |
8d577d32 | 3103 | static int |
2bca57ba | 3104 | oload_method_static_p (struct fn_field *fns_ptr, int index) |
8d577d32 | 3105 | { |
2bca57ba | 3106 | if (fns_ptr && index >= 0 && TYPE_FN_FIELD_STATIC_P (fns_ptr, index)) |
8d577d32 | 3107 | return 1; |
c906108c | 3108 | else |
8d577d32 DC |
3109 | return 0; |
3110 | } | |
c906108c | 3111 | |
8d577d32 DC |
3112 | /* Check how good an overload match OLOAD_CHAMP_BV represents. */ |
3113 | ||
3114 | static enum oload_classification | |
3115 | classify_oload_match (struct badness_vector *oload_champ_bv, | |
3116 | int nargs, | |
3117 | int static_offset) | |
3118 | { | |
3119 | int ix; | |
da096638 | 3120 | enum oload_classification worst = STANDARD; |
8d577d32 DC |
3121 | |
3122 | for (ix = 1; ix <= nargs - static_offset; ix++) | |
7f8c9282 | 3123 | { |
6403aeea SW |
3124 | /* If this conversion is as bad as INCOMPATIBLE_TYPE_BADNESS |
3125 | or worse return INCOMPATIBLE. */ | |
3126 | if (compare_ranks (oload_champ_bv->rank[ix], | |
3127 | INCOMPATIBLE_TYPE_BADNESS) <= 0) | |
ac3eeb49 | 3128 | return INCOMPATIBLE; /* Truly mismatched types. */ |
6403aeea SW |
3129 | /* Otherwise If this conversion is as bad as |
3130 | NS_POINTER_CONVERSION_BADNESS or worse return NON_STANDARD. */ | |
3131 | else if (compare_ranks (oload_champ_bv->rank[ix], | |
3132 | NS_POINTER_CONVERSION_BADNESS) <= 0) | |
da096638 | 3133 | worst = NON_STANDARD; /* Non-standard type conversions |
ac3eeb49 | 3134 | needed. */ |
7f8c9282 | 3135 | } |
02f0d45d | 3136 | |
da096638 KS |
3137 | /* If no INCOMPATIBLE classification was found, return the worst one |
3138 | that was found (if any). */ | |
3139 | return worst; | |
c906108c SS |
3140 | } |
3141 | ||
ac3eeb49 MS |
3142 | /* C++: return 1 is NAME is a legitimate name for the destructor of |
3143 | type TYPE. If TYPE does not have a destructor, or if NAME is | |
d8228535 JK |
3144 | inappropriate for TYPE, an error is signaled. Parameter TYPE should not yet |
3145 | have CHECK_TYPEDEF applied, this function will apply it itself. */ | |
3146 | ||
c906108c | 3147 | int |
d8228535 | 3148 | destructor_name_p (const char *name, struct type *type) |
c906108c | 3149 | { |
c906108c SS |
3150 | if (name[0] == '~') |
3151 | { | |
d8228535 JK |
3152 | const char *dname = type_name_no_tag_or_error (type); |
3153 | const char *cp = strchr (dname, '<'); | |
c906108c SS |
3154 | unsigned int len; |
3155 | ||
3156 | /* Do not compare the template part for template classes. */ | |
3157 | if (cp == NULL) | |
3158 | len = strlen (dname); | |
3159 | else | |
3160 | len = cp - dname; | |
bf896cb0 | 3161 | if (strlen (name + 1) != len || strncmp (dname, name + 1, len) != 0) |
8a3fe4f8 | 3162 | error (_("name of destructor must equal name of class")); |
c906108c SS |
3163 | else |
3164 | return 1; | |
3165 | } | |
3166 | return 0; | |
3167 | } | |
3168 | ||
3d567982 TT |
3169 | /* Find an enum constant named NAME in TYPE. TYPE must be an "enum |
3170 | class". If the name is found, return a value representing it; | |
3171 | otherwise throw an exception. */ | |
3172 | ||
3173 | static struct value * | |
3174 | enum_constant_from_type (struct type *type, const char *name) | |
3175 | { | |
3176 | int i; | |
3177 | int name_len = strlen (name); | |
3178 | ||
3179 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_ENUM | |
3180 | && TYPE_DECLARED_CLASS (type)); | |
3181 | ||
3182 | for (i = TYPE_N_BASECLASSES (type); i < TYPE_NFIELDS (type); ++i) | |
3183 | { | |
3184 | const char *fname = TYPE_FIELD_NAME (type, i); | |
3185 | int len; | |
3186 | ||
3187 | if (TYPE_FIELD_LOC_KIND (type, i) != FIELD_LOC_KIND_ENUMVAL | |
3188 | || fname == NULL) | |
3189 | continue; | |
3190 | ||
3191 | /* Look for the trailing "::NAME", since enum class constant | |
3192 | names are qualified here. */ | |
3193 | len = strlen (fname); | |
3194 | if (len + 2 >= name_len | |
3195 | && fname[len - name_len - 2] == ':' | |
3196 | && fname[len - name_len - 1] == ':' | |
3197 | && strcmp (&fname[len - name_len], name) == 0) | |
3198 | return value_from_longest (type, TYPE_FIELD_ENUMVAL (type, i)); | |
3199 | } | |
3200 | ||
3201 | error (_("no constant named \"%s\" in enum \"%s\""), | |
3202 | name, TYPE_TAG_NAME (type)); | |
3203 | } | |
3204 | ||
79c2c32d | 3205 | /* C++: Given an aggregate type CURTYPE, and a member name NAME, |
0d5de010 DJ |
3206 | return the appropriate member (or the address of the member, if |
3207 | WANT_ADDRESS). This function is used to resolve user expressions | |
3208 | of the form "DOMAIN::NAME". For more details on what happens, see | |
3209 | the comment before value_struct_elt_for_reference. */ | |
79c2c32d DC |
3210 | |
3211 | struct value * | |
c848d642 | 3212 | value_aggregate_elt (struct type *curtype, const char *name, |
072bba3b | 3213 | struct type *expect_type, int want_address, |
79c2c32d DC |
3214 | enum noside noside) |
3215 | { | |
3216 | switch (TYPE_CODE (curtype)) | |
3217 | { | |
3218 | case TYPE_CODE_STRUCT: | |
3219 | case TYPE_CODE_UNION: | |
ac3eeb49 | 3220 | return value_struct_elt_for_reference (curtype, 0, curtype, |
072bba3b | 3221 | name, expect_type, |
0d5de010 | 3222 | want_address, noside); |
79c2c32d | 3223 | case TYPE_CODE_NAMESPACE: |
ac3eeb49 MS |
3224 | return value_namespace_elt (curtype, name, |
3225 | want_address, noside); | |
3d567982 TT |
3226 | |
3227 | case TYPE_CODE_ENUM: | |
3228 | return enum_constant_from_type (curtype, name); | |
3229 | ||
79c2c32d DC |
3230 | default: |
3231 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 3232 | _("non-aggregate type in value_aggregate_elt")); |
79c2c32d DC |
3233 | } |
3234 | } | |
3235 | ||
072bba3b | 3236 | /* Compares the two method/function types T1 and T2 for "equality" |
b021a221 | 3237 | with respect to the methods' parameters. If the types of the |
072bba3b KS |
3238 | two parameter lists are the same, returns 1; 0 otherwise. This |
3239 | comparison may ignore any artificial parameters in T1 if | |
3240 | SKIP_ARTIFICIAL is non-zero. This function will ALWAYS skip | |
3241 | the first artificial parameter in T1, assumed to be a 'this' pointer. | |
3242 | ||
3243 | The type T2 is expected to have come from make_params (in eval.c). */ | |
3244 | ||
3245 | static int | |
3246 | compare_parameters (struct type *t1, struct type *t2, int skip_artificial) | |
3247 | { | |
3248 | int start = 0; | |
3249 | ||
80b23b6a | 3250 | if (TYPE_NFIELDS (t1) > 0 && TYPE_FIELD_ARTIFICIAL (t1, 0)) |
072bba3b KS |
3251 | ++start; |
3252 | ||
3253 | /* If skipping artificial fields, find the first real field | |
581e13c1 | 3254 | in T1. */ |
072bba3b KS |
3255 | if (skip_artificial) |
3256 | { | |
3257 | while (start < TYPE_NFIELDS (t1) | |
3258 | && TYPE_FIELD_ARTIFICIAL (t1, start)) | |
3259 | ++start; | |
3260 | } | |
3261 | ||
581e13c1 | 3262 | /* Now compare parameters. */ |
072bba3b KS |
3263 | |
3264 | /* Special case: a method taking void. T1 will contain no | |
3265 | non-artificial fields, and T2 will contain TYPE_CODE_VOID. */ | |
3266 | if ((TYPE_NFIELDS (t1) - start) == 0 && TYPE_NFIELDS (t2) == 1 | |
3267 | && TYPE_CODE (TYPE_FIELD_TYPE (t2, 0)) == TYPE_CODE_VOID) | |
3268 | return 1; | |
3269 | ||
3270 | if ((TYPE_NFIELDS (t1) - start) == TYPE_NFIELDS (t2)) | |
3271 | { | |
3272 | int i; | |
a109c7c1 | 3273 | |
072bba3b KS |
3274 | for (i = 0; i < TYPE_NFIELDS (t2); ++i) |
3275 | { | |
6403aeea | 3276 | if (compare_ranks (rank_one_type (TYPE_FIELD_TYPE (t1, start + i), |
da096638 | 3277 | TYPE_FIELD_TYPE (t2, i), NULL), |
6403aeea | 3278 | EXACT_MATCH_BADNESS) != 0) |
072bba3b KS |
3279 | return 0; |
3280 | } | |
3281 | ||
3282 | return 1; | |
3283 | } | |
3284 | ||
3285 | return 0; | |
3286 | } | |
3287 | ||
c906108c | 3288 | /* C++: Given an aggregate type CURTYPE, and a member name NAME, |
ac3eeb49 MS |
3289 | return the address of this member as a "pointer to member" type. |
3290 | If INTYPE is non-null, then it will be the type of the member we | |
3291 | are looking for. This will help us resolve "pointers to member | |
3292 | functions". This function is used to resolve user expressions of | |
3293 | the form "DOMAIN::NAME". */ | |
c906108c | 3294 | |
63d06c5c | 3295 | static struct value * |
fba45db2 | 3296 | value_struct_elt_for_reference (struct type *domain, int offset, |
c848d642 | 3297 | struct type *curtype, const char *name, |
ac3eeb49 MS |
3298 | struct type *intype, |
3299 | int want_address, | |
63d06c5c | 3300 | enum noside noside) |
c906108c | 3301 | { |
52f0bd74 AC |
3302 | struct type *t = curtype; |
3303 | int i; | |
0d5de010 | 3304 | struct value *v, *result; |
c906108c | 3305 | |
c5aa993b | 3306 | if (TYPE_CODE (t) != TYPE_CODE_STRUCT |
c906108c | 3307 | && TYPE_CODE (t) != TYPE_CODE_UNION) |
3e43a32a MS |
3308 | error (_("Internal error: non-aggregate type " |
3309 | "to value_struct_elt_for_reference")); | |
c906108c SS |
3310 | |
3311 | for (i = TYPE_NFIELDS (t) - 1; i >= TYPE_N_BASECLASSES (t); i--) | |
3312 | { | |
0d5cff50 | 3313 | const char *t_field_name = TYPE_FIELD_NAME (t, i); |
c5aa993b | 3314 | |
6314a349 | 3315 | if (t_field_name && strcmp (t_field_name, name) == 0) |
c906108c | 3316 | { |
d6a843b5 | 3317 | if (field_is_static (&TYPE_FIELD (t, i))) |
c906108c SS |
3318 | { |
3319 | v = value_static_field (t, i); | |
0d5de010 DJ |
3320 | if (want_address) |
3321 | v = value_addr (v); | |
c906108c SS |
3322 | return v; |
3323 | } | |
3324 | if (TYPE_FIELD_PACKED (t, i)) | |
8a3fe4f8 | 3325 | error (_("pointers to bitfield members not allowed")); |
c5aa993b | 3326 | |
0d5de010 DJ |
3327 | if (want_address) |
3328 | return value_from_longest | |
3329 | (lookup_memberptr_type (TYPE_FIELD_TYPE (t, i), domain), | |
3330 | offset + (LONGEST) (TYPE_FIELD_BITPOS (t, i) >> 3)); | |
f7e3ecae | 3331 | else if (noside != EVAL_NORMAL) |
0d5de010 DJ |
3332 | return allocate_value (TYPE_FIELD_TYPE (t, i)); |
3333 | else | |
f7e3ecae KS |
3334 | { |
3335 | /* Try to evaluate NAME as a qualified name with implicit | |
3336 | this pointer. In this case, attempt to return the | |
3337 | equivalent to `this->*(&TYPE::NAME)'. */ | |
3338 | v = value_of_this_silent (current_language); | |
3339 | if (v != NULL) | |
3340 | { | |
3341 | struct value *ptr; | |
3342 | long mem_offset; | |
3343 | struct type *type, *tmp; | |
3344 | ||
3345 | ptr = value_aggregate_elt (domain, name, NULL, 1, noside); | |
3346 | type = check_typedef (value_type (ptr)); | |
3347 | gdb_assert (type != NULL | |
3348 | && TYPE_CODE (type) == TYPE_CODE_MEMBERPTR); | |
4bfb94b8 | 3349 | tmp = lookup_pointer_type (TYPE_SELF_TYPE (type)); |
f7e3ecae KS |
3350 | v = value_cast_pointers (tmp, v, 1); |
3351 | mem_offset = value_as_long (ptr); | |
3352 | tmp = lookup_pointer_type (TYPE_TARGET_TYPE (type)); | |
3353 | result = value_from_pointer (tmp, | |
3354 | value_as_long (v) + mem_offset); | |
3355 | return value_ind (result); | |
3356 | } | |
3357 | ||
3358 | error (_("Cannot reference non-static field \"%s\""), name); | |
3359 | } | |
c906108c SS |
3360 | } |
3361 | } | |
3362 | ||
ac3eeb49 MS |
3363 | /* C++: If it was not found as a data field, then try to return it |
3364 | as a pointer to a method. */ | |
c906108c | 3365 | |
c906108c SS |
3366 | /* Perform all necessary dereferencing. */ |
3367 | while (intype && TYPE_CODE (intype) == TYPE_CODE_PTR) | |
3368 | intype = TYPE_TARGET_TYPE (intype); | |
3369 | ||
3370 | for (i = TYPE_NFN_FIELDS (t) - 1; i >= 0; --i) | |
3371 | { | |
0d5cff50 | 3372 | const char *t_field_name = TYPE_FN_FIELDLIST_NAME (t, i); |
c906108c SS |
3373 | char dem_opname[64]; |
3374 | ||
61012eef GB |
3375 | if (startswith (t_field_name, "__") |
3376 | || startswith (t_field_name, "op") | |
3377 | || startswith (t_field_name, "type")) | |
c906108c | 3378 | { |
ac3eeb49 MS |
3379 | if (cplus_demangle_opname (t_field_name, |
3380 | dem_opname, DMGL_ANSI)) | |
c5aa993b | 3381 | t_field_name = dem_opname; |
ac3eeb49 MS |
3382 | else if (cplus_demangle_opname (t_field_name, |
3383 | dem_opname, 0)) | |
c906108c | 3384 | t_field_name = dem_opname; |
c906108c | 3385 | } |
6314a349 | 3386 | if (t_field_name && strcmp (t_field_name, name) == 0) |
c906108c | 3387 | { |
072bba3b KS |
3388 | int j; |
3389 | int len = TYPE_FN_FIELDLIST_LENGTH (t, i); | |
c906108c | 3390 | struct fn_field *f = TYPE_FN_FIELDLIST1 (t, i); |
c5aa993b | 3391 | |
de17c821 DJ |
3392 | check_stub_method_group (t, i); |
3393 | ||
c906108c SS |
3394 | if (intype) |
3395 | { | |
072bba3b KS |
3396 | for (j = 0; j < len; ++j) |
3397 | { | |
3693fdb3 PA |
3398 | if (TYPE_CONST (intype) != TYPE_FN_FIELD_CONST (f, j)) |
3399 | continue; | |
3400 | if (TYPE_VOLATILE (intype) != TYPE_FN_FIELD_VOLATILE (f, j)) | |
3401 | continue; | |
3402 | ||
072bba3b | 3403 | if (compare_parameters (TYPE_FN_FIELD_TYPE (f, j), intype, 0) |
3e43a32a MS |
3404 | || compare_parameters (TYPE_FN_FIELD_TYPE (f, j), |
3405 | intype, 1)) | |
072bba3b KS |
3406 | break; |
3407 | } | |
3408 | ||
3409 | if (j == len) | |
3e43a32a MS |
3410 | error (_("no member function matches " |
3411 | "that type instantiation")); | |
7f79b1c5 | 3412 | } |
c906108c | 3413 | else |
072bba3b KS |
3414 | { |
3415 | int ii; | |
7f79b1c5 DJ |
3416 | |
3417 | j = -1; | |
53832f31 | 3418 | for (ii = 0; ii < len; ++ii) |
072bba3b | 3419 | { |
7f79b1c5 DJ |
3420 | /* Skip artificial methods. This is necessary if, |
3421 | for example, the user wants to "print | |
3422 | subclass::subclass" with only one user-defined | |
53832f31 TT |
3423 | constructor. There is no ambiguity in this case. |
3424 | We are careful here to allow artificial methods | |
3425 | if they are the unique result. */ | |
072bba3b | 3426 | if (TYPE_FN_FIELD_ARTIFICIAL (f, ii)) |
53832f31 TT |
3427 | { |
3428 | if (j == -1) | |
3429 | j = ii; | |
3430 | continue; | |
3431 | } | |
072bba3b | 3432 | |
7f79b1c5 DJ |
3433 | /* Desired method is ambiguous if more than one |
3434 | method is defined. */ | |
53832f31 | 3435 | if (j != -1 && !TYPE_FN_FIELD_ARTIFICIAL (f, j)) |
3e43a32a MS |
3436 | error (_("non-unique member `%s' requires " |
3437 | "type instantiation"), name); | |
072bba3b | 3438 | |
7f79b1c5 DJ |
3439 | j = ii; |
3440 | } | |
53832f31 TT |
3441 | |
3442 | if (j == -1) | |
3443 | error (_("no matching member function")); | |
072bba3b | 3444 | } |
c5aa993b | 3445 | |
0d5de010 DJ |
3446 | if (TYPE_FN_FIELD_STATIC_P (f, j)) |
3447 | { | |
ac3eeb49 MS |
3448 | struct symbol *s = |
3449 | lookup_symbol (TYPE_FN_FIELD_PHYSNAME (f, j), | |
d12307c1 | 3450 | 0, VAR_DOMAIN, 0).symbol; |
a109c7c1 | 3451 | |
0d5de010 DJ |
3452 | if (s == NULL) |
3453 | return NULL; | |
3454 | ||
3455 | if (want_address) | |
63e43d3a | 3456 | return value_addr (read_var_value (s, 0, 0)); |
0d5de010 | 3457 | else |
63e43d3a | 3458 | return read_var_value (s, 0, 0); |
0d5de010 DJ |
3459 | } |
3460 | ||
c906108c SS |
3461 | if (TYPE_FN_FIELD_VIRTUAL_P (f, j)) |
3462 | { | |
0d5de010 DJ |
3463 | if (want_address) |
3464 | { | |
3465 | result = allocate_value | |
3466 | (lookup_methodptr_type (TYPE_FN_FIELD_TYPE (f, j))); | |
ad4820ab UW |
3467 | cplus_make_method_ptr (value_type (result), |
3468 | value_contents_writeable (result), | |
0d5de010 DJ |
3469 | TYPE_FN_FIELD_VOFFSET (f, j), 1); |
3470 | } | |
3471 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
3472 | return allocate_value (TYPE_FN_FIELD_TYPE (f, j)); | |
3473 | else | |
3474 | error (_("Cannot reference virtual member function \"%s\""), | |
3475 | name); | |
c906108c SS |
3476 | } |
3477 | else | |
3478 | { | |
ac3eeb49 MS |
3479 | struct symbol *s = |
3480 | lookup_symbol (TYPE_FN_FIELD_PHYSNAME (f, j), | |
d12307c1 | 3481 | 0, VAR_DOMAIN, 0).symbol; |
a109c7c1 | 3482 | |
c906108c | 3483 | if (s == NULL) |
0d5de010 DJ |
3484 | return NULL; |
3485 | ||
63e43d3a | 3486 | v = read_var_value (s, 0, 0); |
0d5de010 DJ |
3487 | if (!want_address) |
3488 | result = v; | |
c906108c SS |
3489 | else |
3490 | { | |
0d5de010 | 3491 | result = allocate_value (lookup_methodptr_type (TYPE_FN_FIELD_TYPE (f, j))); |
ad4820ab UW |
3492 | cplus_make_method_ptr (value_type (result), |
3493 | value_contents_writeable (result), | |
42ae5230 | 3494 | value_address (v), 0); |
c906108c | 3495 | } |
c906108c | 3496 | } |
0d5de010 | 3497 | return result; |
c906108c SS |
3498 | } |
3499 | } | |
3500 | for (i = TYPE_N_BASECLASSES (t) - 1; i >= 0; i--) | |
3501 | { | |
f23631e4 | 3502 | struct value *v; |
c906108c SS |
3503 | int base_offset; |
3504 | ||
3505 | if (BASETYPE_VIA_VIRTUAL (t, i)) | |
3506 | base_offset = 0; | |
3507 | else | |
3508 | base_offset = TYPE_BASECLASS_BITPOS (t, i) / 8; | |
3509 | v = value_struct_elt_for_reference (domain, | |
3510 | offset + base_offset, | |
3511 | TYPE_BASECLASS (t, i), | |
ac3eeb49 MS |
3512 | name, intype, |
3513 | want_address, noside); | |
c906108c SS |
3514 | if (v) |
3515 | return v; | |
3516 | } | |
63d06c5c DC |
3517 | |
3518 | /* As a last chance, pretend that CURTYPE is a namespace, and look | |
3519 | it up that way; this (frequently) works for types nested inside | |
3520 | classes. */ | |
3521 | ||
ac3eeb49 MS |
3522 | return value_maybe_namespace_elt (curtype, name, |
3523 | want_address, noside); | |
c906108c SS |
3524 | } |
3525 | ||
79c2c32d DC |
3526 | /* C++: Return the member NAME of the namespace given by the type |
3527 | CURTYPE. */ | |
3528 | ||
3529 | static struct value * | |
3530 | value_namespace_elt (const struct type *curtype, | |
c848d642 | 3531 | const char *name, int want_address, |
79c2c32d | 3532 | enum noside noside) |
63d06c5c DC |
3533 | { |
3534 | struct value *retval = value_maybe_namespace_elt (curtype, name, | |
ac3eeb49 MS |
3535 | want_address, |
3536 | noside); | |
63d06c5c DC |
3537 | |
3538 | if (retval == NULL) | |
ac3eeb49 MS |
3539 | error (_("No symbol \"%s\" in namespace \"%s\"."), |
3540 | name, TYPE_TAG_NAME (curtype)); | |
63d06c5c DC |
3541 | |
3542 | return retval; | |
3543 | } | |
3544 | ||
3545 | /* A helper function used by value_namespace_elt and | |
3546 | value_struct_elt_for_reference. It looks up NAME inside the | |
3547 | context CURTYPE; this works if CURTYPE is a namespace or if CURTYPE | |
3548 | is a class and NAME refers to a type in CURTYPE itself (as opposed | |
3549 | to, say, some base class of CURTYPE). */ | |
3550 | ||
3551 | static struct value * | |
3552 | value_maybe_namespace_elt (const struct type *curtype, | |
c848d642 | 3553 | const char *name, int want_address, |
63d06c5c | 3554 | enum noside noside) |
79c2c32d DC |
3555 | { |
3556 | const char *namespace_name = TYPE_TAG_NAME (curtype); | |
d12307c1 | 3557 | struct block_symbol sym; |
0d5de010 | 3558 | struct value *result; |
79c2c32d | 3559 | |
13387711 | 3560 | sym = cp_lookup_symbol_namespace (namespace_name, name, |
41f62f39 JK |
3561 | get_selected_block (0), VAR_DOMAIN); |
3562 | ||
d12307c1 | 3563 | if (sym.symbol == NULL) |
63d06c5c | 3564 | return NULL; |
79c2c32d | 3565 | else if ((noside == EVAL_AVOID_SIDE_EFFECTS) |
d12307c1 PMR |
3566 | && (SYMBOL_CLASS (sym.symbol) == LOC_TYPEDEF)) |
3567 | result = allocate_value (SYMBOL_TYPE (sym.symbol)); | |
79c2c32d | 3568 | else |
d12307c1 | 3569 | result = value_of_variable (sym.symbol, sym.block); |
0d5de010 | 3570 | |
ae6a105d | 3571 | if (want_address) |
0d5de010 DJ |
3572 | result = value_addr (result); |
3573 | ||
3574 | return result; | |
79c2c32d DC |
3575 | } |
3576 | ||
dfcee124 | 3577 | /* Given a pointer or a reference value V, find its real (RTTI) type. |
ac3eeb49 | 3578 | |
c906108c | 3579 | Other parameters FULL, TOP, USING_ENC as with value_rtti_type() |
ac3eeb49 | 3580 | and refer to the values computed for the object pointed to. */ |
c906108c SS |
3581 | |
3582 | struct type * | |
dfcee124 | 3583 | value_rtti_indirect_type (struct value *v, int *full, |
6b850546 | 3584 | LONGEST *top, int *using_enc) |
c906108c | 3585 | { |
f7e5394d | 3586 | struct value *target = NULL; |
dfcee124 AG |
3587 | struct type *type, *real_type, *target_type; |
3588 | ||
3589 | type = value_type (v); | |
3590 | type = check_typedef (type); | |
aa006118 | 3591 | if (TYPE_IS_REFERENCE (type)) |
dfcee124 AG |
3592 | target = coerce_ref (v); |
3593 | else if (TYPE_CODE (type) == TYPE_CODE_PTR) | |
f7e5394d | 3594 | { |
f7e5394d | 3595 | |
492d29ea | 3596 | TRY |
f7e5394d SM |
3597 | { |
3598 | target = value_ind (v); | |
3599 | } | |
492d29ea | 3600 | CATCH (except, RETURN_MASK_ERROR) |
f7e5394d SM |
3601 | { |
3602 | if (except.error == MEMORY_ERROR) | |
3603 | { | |
3604 | /* value_ind threw a memory error. The pointer is NULL or | |
3605 | contains an uninitialized value: we can't determine any | |
3606 | type. */ | |
3607 | return NULL; | |
3608 | } | |
3609 | throw_exception (except); | |
3610 | } | |
492d29ea | 3611 | END_CATCH |
f7e5394d | 3612 | } |
dfcee124 AG |
3613 | else |
3614 | return NULL; | |
c906108c | 3615 | |
dfcee124 AG |
3616 | real_type = value_rtti_type (target, full, top, using_enc); |
3617 | ||
3618 | if (real_type) | |
3619 | { | |
3620 | /* Copy qualifiers to the referenced object. */ | |
3621 | target_type = value_type (target); | |
3622 | real_type = make_cv_type (TYPE_CONST (target_type), | |
3623 | TYPE_VOLATILE (target_type), real_type, NULL); | |
aa006118 AV |
3624 | if (TYPE_IS_REFERENCE (type)) |
3625 | real_type = lookup_reference_type (real_type, TYPE_CODE (type)); | |
dfcee124 AG |
3626 | else if (TYPE_CODE (type) == TYPE_CODE_PTR) |
3627 | real_type = lookup_pointer_type (real_type); | |
3628 | else | |
3629 | internal_error (__FILE__, __LINE__, _("Unexpected value type.")); | |
3630 | ||
3631 | /* Copy qualifiers to the pointer/reference. */ | |
3632 | real_type = make_cv_type (TYPE_CONST (type), TYPE_VOLATILE (type), | |
3633 | real_type, NULL); | |
3634 | } | |
c906108c | 3635 | |
dfcee124 | 3636 | return real_type; |
c906108c SS |
3637 | } |
3638 | ||
3639 | /* Given a value pointed to by ARGP, check its real run-time type, and | |
3640 | if that is different from the enclosing type, create a new value | |
3641 | using the real run-time type as the enclosing type (and of the same | |
3642 | type as ARGP) and return it, with the embedded offset adjusted to | |
ac3eeb49 MS |
3643 | be the correct offset to the enclosed object. RTYPE is the type, |
3644 | and XFULL, XTOP, and XUSING_ENC are the other parameters, computed | |
3645 | by value_rtti_type(). If these are available, they can be supplied | |
3646 | and a second call to value_rtti_type() is avoided. (Pass RTYPE == | |
3647 | NULL if they're not available. */ | |
c906108c | 3648 | |
f23631e4 | 3649 | struct value * |
ac3eeb49 MS |
3650 | value_full_object (struct value *argp, |
3651 | struct type *rtype, | |
3652 | int xfull, int xtop, | |
fba45db2 | 3653 | int xusing_enc) |
c906108c | 3654 | { |
c5aa993b | 3655 | struct type *real_type; |
c906108c | 3656 | int full = 0; |
6b850546 | 3657 | LONGEST top = -1; |
c906108c | 3658 | int using_enc = 0; |
f23631e4 | 3659 | struct value *new_val; |
c906108c SS |
3660 | |
3661 | if (rtype) | |
3662 | { | |
3663 | real_type = rtype; | |
3664 | full = xfull; | |
3665 | top = xtop; | |
3666 | using_enc = xusing_enc; | |
3667 | } | |
3668 | else | |
3669 | real_type = value_rtti_type (argp, &full, &top, &using_enc); | |
3670 | ||
ac3eeb49 | 3671 | /* If no RTTI data, or if object is already complete, do nothing. */ |
4754a64e | 3672 | if (!real_type || real_type == value_enclosing_type (argp)) |
c906108c SS |
3673 | return argp; |
3674 | ||
a7860e76 TT |
3675 | /* In a destructor we might see a real type that is a superclass of |
3676 | the object's type. In this case it is better to leave the object | |
3677 | as-is. */ | |
3678 | if (full | |
3679 | && TYPE_LENGTH (real_type) < TYPE_LENGTH (value_enclosing_type (argp))) | |
3680 | return argp; | |
3681 | ||
c906108c | 3682 | /* If we have the full object, but for some reason the enclosing |
ac3eeb49 MS |
3683 | type is wrong, set it. */ |
3684 | /* pai: FIXME -- sounds iffy */ | |
c906108c SS |
3685 | if (full) |
3686 | { | |
4dfea560 DE |
3687 | argp = value_copy (argp); |
3688 | set_value_enclosing_type (argp, real_type); | |
c906108c SS |
3689 | return argp; |
3690 | } | |
3691 | ||
581e13c1 | 3692 | /* Check if object is in memory. */ |
c906108c SS |
3693 | if (VALUE_LVAL (argp) != lval_memory) |
3694 | { | |
3e43a32a MS |
3695 | warning (_("Couldn't retrieve complete object of RTTI " |
3696 | "type %s; object may be in register(s)."), | |
ac3eeb49 | 3697 | TYPE_NAME (real_type)); |
c5aa993b | 3698 | |
c906108c SS |
3699 | return argp; |
3700 | } | |
c5aa993b | 3701 | |
ac3eeb49 MS |
3702 | /* All other cases -- retrieve the complete object. */ |
3703 | /* Go back by the computed top_offset from the beginning of the | |
3704 | object, adjusting for the embedded offset of argp if that's what | |
3705 | value_rtti_type used for its computation. */ | |
42ae5230 | 3706 | new_val = value_at_lazy (real_type, value_address (argp) - top + |
13c3b5f5 | 3707 | (using_enc ? 0 : value_embedded_offset (argp))); |
04624583 | 3708 | deprecated_set_value_type (new_val, value_type (argp)); |
13c3b5f5 AC |
3709 | set_value_embedded_offset (new_val, (using_enc |
3710 | ? top + value_embedded_offset (argp) | |
3711 | : top)); | |
c906108c SS |
3712 | return new_val; |
3713 | } | |
3714 | ||
389e51db | 3715 | |
85bc8cb7 JK |
3716 | /* Return the value of the local variable, if one exists. Throw error |
3717 | otherwise, such as if the request is made in an inappropriate context. */ | |
c906108c | 3718 | |
f23631e4 | 3719 | struct value * |
85bc8cb7 | 3720 | value_of_this (const struct language_defn *lang) |
c906108c | 3721 | { |
63e43d3a | 3722 | struct block_symbol sym; |
3977b71f | 3723 | const struct block *b; |
206415a3 | 3724 | struct frame_info *frame; |
c906108c | 3725 | |
66a17cb6 | 3726 | if (!lang->la_name_of_this) |
85bc8cb7 | 3727 | error (_("no `this' in current language")); |
aee28ec6 | 3728 | |
85bc8cb7 | 3729 | frame = get_selected_frame (_("no frame selected")); |
c906108c | 3730 | |
66a17cb6 | 3731 | b = get_frame_block (frame, NULL); |
c906108c | 3732 | |
63e43d3a PMR |
3733 | sym = lookup_language_this (lang, b); |
3734 | if (sym.symbol == NULL) | |
85bc8cb7 JK |
3735 | error (_("current stack frame does not contain a variable named `%s'"), |
3736 | lang->la_name_of_this); | |
3737 | ||
63e43d3a | 3738 | return read_var_value (sym.symbol, sym.block, frame); |
85bc8cb7 JK |
3739 | } |
3740 | ||
3741 | /* Return the value of the local variable, if one exists. Return NULL | |
3742 | otherwise. Never throw error. */ | |
3743 | ||
3744 | struct value * | |
3745 | value_of_this_silent (const struct language_defn *lang) | |
3746 | { | |
3747 | struct value *ret = NULL; | |
85bc8cb7 | 3748 | |
492d29ea | 3749 | TRY |
c906108c | 3750 | { |
85bc8cb7 | 3751 | ret = value_of_this (lang); |
c906108c | 3752 | } |
492d29ea PA |
3753 | CATCH (except, RETURN_MASK_ERROR) |
3754 | { | |
3755 | } | |
3756 | END_CATCH | |
c906108c | 3757 | |
d069f99d AF |
3758 | return ret; |
3759 | } | |
3760 | ||
ac3eeb49 MS |
3761 | /* Create a slice (sub-string, sub-array) of ARRAY, that is LENGTH |
3762 | elements long, starting at LOWBOUND. The result has the same lower | |
3763 | bound as the original ARRAY. */ | |
c906108c | 3764 | |
f23631e4 AC |
3765 | struct value * |
3766 | value_slice (struct value *array, int lowbound, int length) | |
c906108c SS |
3767 | { |
3768 | struct type *slice_range_type, *slice_type, *range_type; | |
7a67d0fe | 3769 | LONGEST lowerbound, upperbound; |
f23631e4 | 3770 | struct value *slice; |
c906108c | 3771 | struct type *array_type; |
ac3eeb49 | 3772 | |
df407dfe | 3773 | array_type = check_typedef (value_type (array)); |
c906108c | 3774 | if (TYPE_CODE (array_type) != TYPE_CODE_ARRAY |
6b1755ce | 3775 | && TYPE_CODE (array_type) != TYPE_CODE_STRING) |
8a3fe4f8 | 3776 | error (_("cannot take slice of non-array")); |
ac3eeb49 | 3777 | |
c906108c SS |
3778 | range_type = TYPE_INDEX_TYPE (array_type); |
3779 | if (get_discrete_bounds (range_type, &lowerbound, &upperbound) < 0) | |
8a3fe4f8 | 3780 | error (_("slice from bad array or bitstring")); |
ac3eeb49 | 3781 | |
c906108c | 3782 | if (lowbound < lowerbound || length < 0 |
db034ac5 | 3783 | || lowbound + length - 1 > upperbound) |
8a3fe4f8 | 3784 | error (_("slice out of range")); |
ac3eeb49 | 3785 | |
c906108c SS |
3786 | /* FIXME-type-allocation: need a way to free this type when we are |
3787 | done with it. */ | |
0c9c3474 SA |
3788 | slice_range_type = create_static_range_type ((struct type *) NULL, |
3789 | TYPE_TARGET_TYPE (range_type), | |
3790 | lowbound, | |
3791 | lowbound + length - 1); | |
ac3eeb49 | 3792 | |
a7c88acd JB |
3793 | { |
3794 | struct type *element_type = TYPE_TARGET_TYPE (array_type); | |
3795 | LONGEST offset | |
3796 | = (lowbound - lowerbound) * TYPE_LENGTH (check_typedef (element_type)); | |
ac3eeb49 | 3797 | |
a7c88acd JB |
3798 | slice_type = create_array_type ((struct type *) NULL, |
3799 | element_type, | |
3800 | slice_range_type); | |
3801 | TYPE_CODE (slice_type) = TYPE_CODE (array_type); | |
ac3eeb49 | 3802 | |
a7c88acd JB |
3803 | if (VALUE_LVAL (array) == lval_memory && value_lazy (array)) |
3804 | slice = allocate_value_lazy (slice_type); | |
3805 | else | |
3806 | { | |
3807 | slice = allocate_value (slice_type); | |
3808 | value_contents_copy (slice, 0, array, offset, | |
3ae385af | 3809 | type_length_units (slice_type)); |
a7c88acd JB |
3810 | } |
3811 | ||
3812 | set_value_component_location (slice, array); | |
a7c88acd JB |
3813 | set_value_offset (slice, value_offset (array) + offset); |
3814 | } | |
ac3eeb49 | 3815 | |
c906108c SS |
3816 | return slice; |
3817 | } | |
3818 | ||
ac3eeb49 MS |
3819 | /* Create a value for a FORTRAN complex number. Currently most of the |
3820 | time values are coerced to COMPLEX*16 (i.e. a complex number | |
070ad9f0 DB |
3821 | composed of 2 doubles. This really should be a smarter routine |
3822 | that figures out precision inteligently as opposed to assuming | |
ac3eeb49 | 3823 | doubles. FIXME: fmb */ |
c906108c | 3824 | |
f23631e4 | 3825 | struct value * |
ac3eeb49 MS |
3826 | value_literal_complex (struct value *arg1, |
3827 | struct value *arg2, | |
3828 | struct type *type) | |
c906108c | 3829 | { |
f23631e4 | 3830 | struct value *val; |
c906108c SS |
3831 | struct type *real_type = TYPE_TARGET_TYPE (type); |
3832 | ||
3833 | val = allocate_value (type); | |
3834 | arg1 = value_cast (real_type, arg1); | |
3835 | arg2 = value_cast (real_type, arg2); | |
3836 | ||
990a07ab | 3837 | memcpy (value_contents_raw (val), |
0fd88904 | 3838 | value_contents (arg1), TYPE_LENGTH (real_type)); |
990a07ab | 3839 | memcpy (value_contents_raw (val) + TYPE_LENGTH (real_type), |
0fd88904 | 3840 | value_contents (arg2), TYPE_LENGTH (real_type)); |
c906108c SS |
3841 | return val; |
3842 | } | |
3843 | ||
ac3eeb49 | 3844 | /* Cast a value into the appropriate complex data type. */ |
c906108c | 3845 | |
f23631e4 AC |
3846 | static struct value * |
3847 | cast_into_complex (struct type *type, struct value *val) | |
c906108c SS |
3848 | { |
3849 | struct type *real_type = TYPE_TARGET_TYPE (type); | |
ac3eeb49 | 3850 | |
df407dfe | 3851 | if (TYPE_CODE (value_type (val)) == TYPE_CODE_COMPLEX) |
c906108c | 3852 | { |
df407dfe | 3853 | struct type *val_real_type = TYPE_TARGET_TYPE (value_type (val)); |
f23631e4 AC |
3854 | struct value *re_val = allocate_value (val_real_type); |
3855 | struct value *im_val = allocate_value (val_real_type); | |
c906108c | 3856 | |
990a07ab | 3857 | memcpy (value_contents_raw (re_val), |
0fd88904 | 3858 | value_contents (val), TYPE_LENGTH (val_real_type)); |
990a07ab | 3859 | memcpy (value_contents_raw (im_val), |
0fd88904 | 3860 | value_contents (val) + TYPE_LENGTH (val_real_type), |
c5aa993b | 3861 | TYPE_LENGTH (val_real_type)); |
c906108c SS |
3862 | |
3863 | return value_literal_complex (re_val, im_val, type); | |
3864 | } | |
df407dfe AC |
3865 | else if (TYPE_CODE (value_type (val)) == TYPE_CODE_FLT |
3866 | || TYPE_CODE (value_type (val)) == TYPE_CODE_INT) | |
ac3eeb49 MS |
3867 | return value_literal_complex (val, |
3868 | value_zero (real_type, not_lval), | |
3869 | type); | |
c906108c | 3870 | else |
8a3fe4f8 | 3871 | error (_("cannot cast non-number to complex")); |
c906108c SS |
3872 | } |
3873 | ||
3874 | void | |
fba45db2 | 3875 | _initialize_valops (void) |
c906108c | 3876 | { |
5bf193a2 AC |
3877 | add_setshow_boolean_cmd ("overload-resolution", class_support, |
3878 | &overload_resolution, _("\ | |
3879 | Set overload resolution in evaluating C++ functions."), _("\ | |
ac3eeb49 MS |
3880 | Show overload resolution in evaluating C++ functions."), |
3881 | NULL, NULL, | |
920d2a44 | 3882 | show_overload_resolution, |
5bf193a2 | 3883 | &setlist, &showlist); |
c906108c | 3884 | overload_resolution = 1; |
c906108c | 3885 | } |