Commit | Line | Data |
---|---|---|
c906108c | 1 | /* Perform non-arithmetic operations on values, for GDB. |
990a07ab | 2 | |
9b254dd1 DJ |
3 | Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, |
4 | 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, | |
4c38e0a4 | 5 | 2008, 2009, 2010 Free Software Foundation, Inc. |
c906108c | 6 | |
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 12 | (at your option) any later version. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
c906108c | 18 | |
c5aa993b | 19 | You should have received a copy of the GNU General Public License |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
21 | |
22 | #include "defs.h" | |
23 | #include "symtab.h" | |
24 | #include "gdbtypes.h" | |
25 | #include "value.h" | |
26 | #include "frame.h" | |
27 | #include "inferior.h" | |
28 | #include "gdbcore.h" | |
29 | #include "target.h" | |
30 | #include "demangle.h" | |
31 | #include "language.h" | |
32 | #include "gdbcmd.h" | |
4e052eda | 33 | #include "regcache.h" |
015a42b4 | 34 | #include "cp-abi.h" |
fe898f56 | 35 | #include "block.h" |
04714b91 | 36 | #include "infcall.h" |
de4f826b | 37 | #include "dictionary.h" |
b6429628 | 38 | #include "cp-support.h" |
4ef30785 | 39 | #include "dfp.h" |
029a67e4 | 40 | #include "user-regs.h" |
c906108c SS |
41 | |
42 | #include <errno.h> | |
43 | #include "gdb_string.h" | |
4a1970e4 | 44 | #include "gdb_assert.h" |
79c2c32d | 45 | #include "cp-support.h" |
f4c5303c | 46 | #include "observer.h" |
3e3b026f UW |
47 | #include "objfiles.h" |
48 | #include "symtab.h" | |
c906108c | 49 | |
070ad9f0 | 50 | extern int overload_debug; |
c906108c SS |
51 | /* Local functions. */ |
52 | ||
ad2f7632 DJ |
53 | static int typecmp (int staticp, int varargs, int nargs, |
54 | struct field t1[], struct value *t2[]); | |
c906108c | 55 | |
714f19d5 | 56 | static struct value *search_struct_field (const char *, struct value *, |
ac3eeb49 | 57 | int, struct type *, int); |
c906108c | 58 | |
714f19d5 TT |
59 | static struct value *search_struct_method (const char *, struct value **, |
60 | struct value **, | |
61 | int, int *, struct type *); | |
c906108c | 62 | |
ac3eeb49 MS |
63 | static int find_oload_champ_namespace (struct type **, int, |
64 | const char *, const char *, | |
65 | struct symbol ***, | |
7322dca9 SW |
66 | struct badness_vector **, |
67 | const int no_adl); | |
8d577d32 DC |
68 | |
69 | static | |
ac3eeb49 MS |
70 | int find_oload_champ_namespace_loop (struct type **, int, |
71 | const char *, const char *, | |
72 | int, struct symbol ***, | |
7322dca9 SW |
73 | struct badness_vector **, int *, |
74 | const int no_adl); | |
ac3eeb49 MS |
75 | |
76 | static int find_oload_champ (struct type **, int, int, int, | |
77 | struct fn_field *, struct symbol **, | |
78 | struct badness_vector **); | |
79 | ||
80 | static int oload_method_static (int, struct fn_field *, int); | |
8d577d32 DC |
81 | |
82 | enum oload_classification { STANDARD, NON_STANDARD, INCOMPATIBLE }; | |
83 | ||
84 | static enum | |
ac3eeb49 MS |
85 | oload_classification classify_oload_match (struct badness_vector *, |
86 | int, int); | |
8d577d32 | 87 | |
ac3eeb49 MS |
88 | static struct value *value_struct_elt_for_reference (struct type *, |
89 | int, struct type *, | |
90 | char *, | |
91 | struct type *, | |
92 | int, enum noside); | |
79c2c32d | 93 | |
ac3eeb49 MS |
94 | static struct value *value_namespace_elt (const struct type *, |
95 | char *, int , enum noside); | |
79c2c32d | 96 | |
ac3eeb49 MS |
97 | static struct value *value_maybe_namespace_elt (const struct type *, |
98 | char *, int, | |
99 | enum noside); | |
63d06c5c | 100 | |
a14ed312 | 101 | static CORE_ADDR allocate_space_in_inferior (int); |
c906108c | 102 | |
f23631e4 | 103 | static struct value *cast_into_complex (struct type *, struct value *); |
c906108c | 104 | |
714f19d5 | 105 | static struct fn_field *find_method_list (struct value **, const char *, |
ac3eeb49 MS |
106 | int, struct type *, int *, |
107 | struct type **, int *); | |
7a292a7a | 108 | |
a14ed312 | 109 | void _initialize_valops (void); |
c906108c | 110 | |
c906108c | 111 | #if 0 |
ac3eeb49 MS |
112 | /* Flag for whether we want to abandon failed expression evals by |
113 | default. */ | |
114 | ||
c906108c SS |
115 | static int auto_abandon = 0; |
116 | #endif | |
117 | ||
118 | int overload_resolution = 0; | |
920d2a44 AC |
119 | static void |
120 | show_overload_resolution (struct ui_file *file, int from_tty, | |
ac3eeb49 MS |
121 | struct cmd_list_element *c, |
122 | const char *value) | |
920d2a44 AC |
123 | { |
124 | fprintf_filtered (file, _("\ | |
125 | Overload resolution in evaluating C++ functions is %s.\n"), | |
126 | value); | |
127 | } | |
242bfc55 | 128 | |
3e3b026f UW |
129 | /* Find the address of function name NAME in the inferior. If OBJF_P |
130 | is non-NULL, *OBJF_P will be set to the OBJFILE where the function | |
131 | is defined. */ | |
c906108c | 132 | |
f23631e4 | 133 | struct value * |
3e3b026f | 134 | find_function_in_inferior (const char *name, struct objfile **objf_p) |
c906108c | 135 | { |
52f0bd74 | 136 | struct symbol *sym; |
a109c7c1 | 137 | |
2570f2b7 | 138 | sym = lookup_symbol (name, 0, VAR_DOMAIN, 0); |
c906108c SS |
139 | if (sym != NULL) |
140 | { | |
141 | if (SYMBOL_CLASS (sym) != LOC_BLOCK) | |
142 | { | |
8a3fe4f8 | 143 | error (_("\"%s\" exists in this program but is not a function."), |
c906108c SS |
144 | name); |
145 | } | |
3e3b026f UW |
146 | |
147 | if (objf_p) | |
148 | *objf_p = SYMBOL_SYMTAB (sym)->objfile; | |
149 | ||
c906108c SS |
150 | return value_of_variable (sym, NULL); |
151 | } | |
152 | else | |
153 | { | |
ac3eeb49 MS |
154 | struct minimal_symbol *msymbol = |
155 | lookup_minimal_symbol (name, NULL, NULL); | |
a109c7c1 | 156 | |
c906108c SS |
157 | if (msymbol != NULL) |
158 | { | |
3e3b026f UW |
159 | struct objfile *objfile = msymbol_objfile (msymbol); |
160 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
161 | ||
c906108c | 162 | struct type *type; |
4478b372 | 163 | CORE_ADDR maddr; |
3e3b026f | 164 | type = lookup_pointer_type (builtin_type (gdbarch)->builtin_char); |
c906108c SS |
165 | type = lookup_function_type (type); |
166 | type = lookup_pointer_type (type); | |
4478b372 | 167 | maddr = SYMBOL_VALUE_ADDRESS (msymbol); |
3e3b026f UW |
168 | |
169 | if (objf_p) | |
170 | *objf_p = objfile; | |
171 | ||
4478b372 | 172 | return value_from_pointer (type, maddr); |
c906108c SS |
173 | } |
174 | else | |
175 | { | |
c5aa993b | 176 | if (!target_has_execution) |
8a3fe4f8 | 177 | error (_("evaluation of this expression requires the target program to be active")); |
c5aa993b | 178 | else |
8a3fe4f8 | 179 | error (_("evaluation of this expression requires the program to have a function \"%s\"."), name); |
c906108c SS |
180 | } |
181 | } | |
182 | } | |
183 | ||
ac3eeb49 MS |
184 | /* Allocate NBYTES of space in the inferior using the inferior's |
185 | malloc and return a value that is a pointer to the allocated | |
186 | space. */ | |
c906108c | 187 | |
f23631e4 | 188 | struct value * |
fba45db2 | 189 | value_allocate_space_in_inferior (int len) |
c906108c | 190 | { |
3e3b026f UW |
191 | struct objfile *objf; |
192 | struct value *val = find_function_in_inferior ("malloc", &objf); | |
193 | struct gdbarch *gdbarch = get_objfile_arch (objf); | |
f23631e4 | 194 | struct value *blocklen; |
c906108c | 195 | |
3e3b026f | 196 | blocklen = value_from_longest (builtin_type (gdbarch)->builtin_int, len); |
c906108c SS |
197 | val = call_function_by_hand (val, 1, &blocklen); |
198 | if (value_logical_not (val)) | |
199 | { | |
200 | if (!target_has_execution) | |
8a3fe4f8 | 201 | error (_("No memory available to program now: you need to start the target first")); |
c5aa993b | 202 | else |
8a3fe4f8 | 203 | error (_("No memory available to program: call to malloc failed")); |
c906108c SS |
204 | } |
205 | return val; | |
206 | } | |
207 | ||
208 | static CORE_ADDR | |
fba45db2 | 209 | allocate_space_in_inferior (int len) |
c906108c SS |
210 | { |
211 | return value_as_long (value_allocate_space_in_inferior (len)); | |
212 | } | |
213 | ||
6af87b03 AR |
214 | /* Cast struct value VAL to type TYPE and return as a value. |
215 | Both type and val must be of TYPE_CODE_STRUCT or TYPE_CODE_UNION | |
694182d2 DJ |
216 | for this to work. Typedef to one of the codes is permitted. |
217 | Returns NULL if the cast is neither an upcast nor a downcast. */ | |
6af87b03 AR |
218 | |
219 | static struct value * | |
220 | value_cast_structs (struct type *type, struct value *v2) | |
221 | { | |
222 | struct type *t1; | |
223 | struct type *t2; | |
224 | struct value *v; | |
225 | ||
226 | gdb_assert (type != NULL && v2 != NULL); | |
227 | ||
228 | t1 = check_typedef (type); | |
229 | t2 = check_typedef (value_type (v2)); | |
230 | ||
231 | /* Check preconditions. */ | |
232 | gdb_assert ((TYPE_CODE (t1) == TYPE_CODE_STRUCT | |
233 | || TYPE_CODE (t1) == TYPE_CODE_UNION) | |
234 | && !!"Precondition is that type is of STRUCT or UNION kind."); | |
235 | gdb_assert ((TYPE_CODE (t2) == TYPE_CODE_STRUCT | |
236 | || TYPE_CODE (t2) == TYPE_CODE_UNION) | |
237 | && !!"Precondition is that value is of STRUCT or UNION kind"); | |
238 | ||
191ca0a1 CM |
239 | if (TYPE_NAME (t1) != NULL |
240 | && TYPE_NAME (t2) != NULL | |
241 | && !strcmp (TYPE_NAME (t1), TYPE_NAME (t2))) | |
242 | return NULL; | |
243 | ||
6af87b03 AR |
244 | /* Upcasting: look in the type of the source to see if it contains the |
245 | type of the target as a superclass. If so, we'll need to | |
246 | offset the pointer rather than just change its type. */ | |
247 | if (TYPE_NAME (t1) != NULL) | |
248 | { | |
249 | v = search_struct_field (type_name_no_tag (t1), | |
250 | v2, 0, t2, 1); | |
251 | if (v) | |
252 | return v; | |
253 | } | |
254 | ||
255 | /* Downcasting: look in the type of the target to see if it contains the | |
256 | type of the source as a superclass. If so, we'll need to | |
9c3c02fd | 257 | offset the pointer rather than just change its type. */ |
6af87b03 AR |
258 | if (TYPE_NAME (t2) != NULL) |
259 | { | |
9c3c02fd TT |
260 | /* Try downcasting using the run-time type of the value. */ |
261 | int full, top, using_enc; | |
262 | struct type *real_type; | |
263 | ||
264 | real_type = value_rtti_type (v2, &full, &top, &using_enc); | |
265 | if (real_type) | |
266 | { | |
267 | v = value_full_object (v2, real_type, full, top, using_enc); | |
268 | v = value_at_lazy (real_type, value_address (v)); | |
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 | ||
276 | v = search_struct_field (type_name_no_tag (t2), v, 0, real_type, 1); | |
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 AR |
284 | v = search_struct_field (type_name_no_tag (t2), |
285 | value_zero (t1, not_lval), 0, t1, 1); | |
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 | |
301 | reference types. Returns the new pointer or reference. */ | |
302 | ||
303 | struct value * | |
304 | value_cast_pointers (struct type *type, struct value *arg2) | |
305 | { | |
d160942f | 306 | struct type *type1 = check_typedef (type); |
fb933624 | 307 | struct type *type2 = check_typedef (value_type (arg2)); |
d160942f | 308 | struct type *t1 = check_typedef (TYPE_TARGET_TYPE (type1)); |
fb933624 DJ |
309 | struct type *t2 = check_typedef (TYPE_TARGET_TYPE (type2)); |
310 | ||
311 | if (TYPE_CODE (t1) == TYPE_CODE_STRUCT | |
312 | && TYPE_CODE (t2) == TYPE_CODE_STRUCT | |
313 | && !value_logical_not (arg2)) | |
314 | { | |
6af87b03 | 315 | struct value *v2; |
fb933624 | 316 | |
6af87b03 AR |
317 | if (TYPE_CODE (type2) == TYPE_CODE_REF) |
318 | v2 = coerce_ref (arg2); | |
319 | else | |
320 | v2 = value_ind (arg2); | |
680b56ce | 321 | gdb_assert (TYPE_CODE (check_typedef (value_type (v2))) == TYPE_CODE_STRUCT |
6af87b03 AR |
322 | && !!"Why did coercion fail?"); |
323 | v2 = value_cast_structs (t1, v2); | |
324 | /* At this point we have what we can have, un-dereference if needed. */ | |
325 | if (v2) | |
fb933624 | 326 | { |
6af87b03 | 327 | struct value *v = value_addr (v2); |
a109c7c1 | 328 | |
6af87b03 AR |
329 | deprecated_set_value_type (v, type); |
330 | return v; | |
fb933624 | 331 | } |
6af87b03 | 332 | } |
fb933624 DJ |
333 | |
334 | /* No superclass found, just change the pointer type. */ | |
0d5de010 | 335 | arg2 = value_copy (arg2); |
fb933624 DJ |
336 | deprecated_set_value_type (arg2, type); |
337 | arg2 = value_change_enclosing_type (arg2, type); | |
338 | set_value_pointed_to_offset (arg2, 0); /* pai: chk_val */ | |
339 | return arg2; | |
340 | } | |
341 | ||
c906108c SS |
342 | /* Cast value ARG2 to type TYPE and return as a value. |
343 | More general than a C cast: accepts any two types of the same length, | |
344 | and if ARG2 is an lvalue it can be cast into anything at all. */ | |
345 | /* In C++, casts may change pointer or object representations. */ | |
346 | ||
f23631e4 AC |
347 | struct value * |
348 | value_cast (struct type *type, struct value *arg2) | |
c906108c | 349 | { |
52f0bd74 AC |
350 | enum type_code code1; |
351 | enum type_code code2; | |
352 | int scalar; | |
c906108c SS |
353 | struct type *type2; |
354 | ||
355 | int convert_to_boolean = 0; | |
c5aa993b | 356 | |
df407dfe | 357 | if (value_type (arg2) == type) |
c906108c SS |
358 | return arg2; |
359 | ||
6af87b03 AR |
360 | code1 = TYPE_CODE (check_typedef (type)); |
361 | ||
362 | /* Check if we are casting struct reference to struct reference. */ | |
363 | if (code1 == TYPE_CODE_REF) | |
364 | { | |
365 | /* We dereference type; then we recurse and finally | |
366 | we generate value of the given reference. Nothing wrong with | |
367 | that. */ | |
368 | struct type *t1 = check_typedef (type); | |
369 | struct type *dereftype = check_typedef (TYPE_TARGET_TYPE (t1)); | |
370 | struct value *val = value_cast (dereftype, arg2); | |
a109c7c1 | 371 | |
6af87b03 AR |
372 | return value_ref (val); |
373 | } | |
374 | ||
375 | code2 = TYPE_CODE (check_typedef (value_type (arg2))); | |
376 | ||
377 | if (code2 == TYPE_CODE_REF) | |
378 | /* We deref the value and then do the cast. */ | |
379 | return value_cast (type, coerce_ref (arg2)); | |
380 | ||
c906108c SS |
381 | CHECK_TYPEDEF (type); |
382 | code1 = TYPE_CODE (type); | |
994b9211 | 383 | arg2 = coerce_ref (arg2); |
df407dfe | 384 | type2 = check_typedef (value_type (arg2)); |
c906108c | 385 | |
fb933624 DJ |
386 | /* You can't cast to a reference type. See value_cast_pointers |
387 | instead. */ | |
388 | gdb_assert (code1 != TYPE_CODE_REF); | |
389 | ||
ac3eeb49 MS |
390 | /* A cast to an undetermined-length array_type, such as |
391 | (TYPE [])OBJECT, is treated like a cast to (TYPE [N])OBJECT, | |
392 | where N is sizeof(OBJECT)/sizeof(TYPE). */ | |
c906108c SS |
393 | if (code1 == TYPE_CODE_ARRAY) |
394 | { | |
395 | struct type *element_type = TYPE_TARGET_TYPE (type); | |
396 | unsigned element_length = TYPE_LENGTH (check_typedef (element_type)); | |
a109c7c1 | 397 | |
d78df370 | 398 | if (element_length > 0 && TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type)) |
c906108c SS |
399 | { |
400 | struct type *range_type = TYPE_INDEX_TYPE (type); | |
401 | int val_length = TYPE_LENGTH (type2); | |
402 | LONGEST low_bound, high_bound, new_length; | |
a109c7c1 | 403 | |
c906108c SS |
404 | if (get_discrete_bounds (range_type, &low_bound, &high_bound) < 0) |
405 | low_bound = 0, high_bound = 0; | |
406 | new_length = val_length / element_length; | |
407 | if (val_length % element_length != 0) | |
8a3fe4f8 | 408 | warning (_("array element type size does not divide object size in cast")); |
ac3eeb49 MS |
409 | /* FIXME-type-allocation: need a way to free this type when |
410 | we are done with it. */ | |
c906108c SS |
411 | range_type = create_range_type ((struct type *) NULL, |
412 | TYPE_TARGET_TYPE (range_type), | |
413 | low_bound, | |
414 | new_length + low_bound - 1); | |
ac3eeb49 MS |
415 | deprecated_set_value_type (arg2, |
416 | create_array_type ((struct type *) NULL, | |
417 | element_type, | |
418 | range_type)); | |
c906108c SS |
419 | return arg2; |
420 | } | |
421 | } | |
422 | ||
423 | if (current_language->c_style_arrays | |
424 | && TYPE_CODE (type2) == TYPE_CODE_ARRAY) | |
425 | arg2 = value_coerce_array (arg2); | |
426 | ||
427 | if (TYPE_CODE (type2) == TYPE_CODE_FUNC) | |
428 | arg2 = value_coerce_function (arg2); | |
429 | ||
df407dfe | 430 | type2 = check_typedef (value_type (arg2)); |
c906108c SS |
431 | code2 = TYPE_CODE (type2); |
432 | ||
433 | if (code1 == TYPE_CODE_COMPLEX) | |
434 | return cast_into_complex (type, arg2); | |
435 | if (code1 == TYPE_CODE_BOOL) | |
436 | { | |
437 | code1 = TYPE_CODE_INT; | |
438 | convert_to_boolean = 1; | |
439 | } | |
440 | if (code1 == TYPE_CODE_CHAR) | |
441 | code1 = TYPE_CODE_INT; | |
442 | if (code2 == TYPE_CODE_BOOL || code2 == TYPE_CODE_CHAR) | |
443 | code2 = TYPE_CODE_INT; | |
444 | ||
445 | scalar = (code2 == TYPE_CODE_INT || code2 == TYPE_CODE_FLT | |
4ef30785 TJB |
446 | || code2 == TYPE_CODE_DECFLOAT || code2 == TYPE_CODE_ENUM |
447 | || code2 == TYPE_CODE_RANGE); | |
c906108c | 448 | |
6af87b03 AR |
449 | if ((code1 == TYPE_CODE_STRUCT || code1 == TYPE_CODE_UNION) |
450 | && (code2 == TYPE_CODE_STRUCT || code2 == TYPE_CODE_UNION) | |
c906108c | 451 | && TYPE_NAME (type) != 0) |
694182d2 DJ |
452 | { |
453 | struct value *v = value_cast_structs (type, arg2); | |
a109c7c1 | 454 | |
694182d2 DJ |
455 | if (v) |
456 | return v; | |
457 | } | |
458 | ||
c906108c SS |
459 | if (code1 == TYPE_CODE_FLT && scalar) |
460 | return value_from_double (type, value_as_double (arg2)); | |
4ef30785 TJB |
461 | else if (code1 == TYPE_CODE_DECFLOAT && scalar) |
462 | { | |
e17a4113 | 463 | enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (type)); |
4ef30785 TJB |
464 | int dec_len = TYPE_LENGTH (type); |
465 | gdb_byte dec[16]; | |
466 | ||
467 | if (code2 == TYPE_CODE_FLT) | |
e17a4113 | 468 | decimal_from_floating (arg2, dec, dec_len, byte_order); |
4ef30785 TJB |
469 | else if (code2 == TYPE_CODE_DECFLOAT) |
470 | decimal_convert (value_contents (arg2), TYPE_LENGTH (type2), | |
e17a4113 | 471 | byte_order, dec, dec_len, byte_order); |
4ef30785 TJB |
472 | else |
473 | /* The only option left is an integral type. */ | |
e17a4113 | 474 | decimal_from_integral (arg2, dec, dec_len, byte_order); |
4ef30785 TJB |
475 | |
476 | return value_from_decfloat (type, dec); | |
477 | } | |
c906108c SS |
478 | else if ((code1 == TYPE_CODE_INT || code1 == TYPE_CODE_ENUM |
479 | || code1 == TYPE_CODE_RANGE) | |
0d5de010 DJ |
480 | && (scalar || code2 == TYPE_CODE_PTR |
481 | || code2 == TYPE_CODE_MEMBERPTR)) | |
c906108c SS |
482 | { |
483 | LONGEST longest; | |
c5aa993b | 484 | |
2bf1f4a1 | 485 | /* When we cast pointers to integers, we mustn't use |
76e71323 | 486 | gdbarch_pointer_to_address to find the address the pointer |
2bf1f4a1 JB |
487 | represents, as value_as_long would. GDB should evaluate |
488 | expressions just as the compiler would --- and the compiler | |
489 | sees a cast as a simple reinterpretation of the pointer's | |
490 | bits. */ | |
491 | if (code2 == TYPE_CODE_PTR) | |
e17a4113 UW |
492 | longest = extract_unsigned_integer |
493 | (value_contents (arg2), TYPE_LENGTH (type2), | |
494 | gdbarch_byte_order (get_type_arch (type2))); | |
2bf1f4a1 JB |
495 | else |
496 | longest = value_as_long (arg2); | |
802db21b | 497 | return value_from_longest (type, convert_to_boolean ? |
716c501e | 498 | (LONGEST) (longest ? 1 : 0) : longest); |
c906108c | 499 | } |
ac3eeb49 MS |
500 | else if (code1 == TYPE_CODE_PTR && (code2 == TYPE_CODE_INT |
501 | || code2 == TYPE_CODE_ENUM | |
502 | || code2 == TYPE_CODE_RANGE)) | |
634acd5f | 503 | { |
4603e466 DT |
504 | /* TYPE_LENGTH (type) is the length of a pointer, but we really |
505 | want the length of an address! -- we are really dealing with | |
506 | addresses (i.e., gdb representations) not pointers (i.e., | |
507 | target representations) here. | |
508 | ||
509 | This allows things like "print *(int *)0x01000234" to work | |
510 | without printing a misleading message -- which would | |
511 | otherwise occur when dealing with a target having two byte | |
512 | pointers and four byte addresses. */ | |
513 | ||
50810684 | 514 | int addr_bit = gdbarch_addr_bit (get_type_arch (type2)); |
634acd5f | 515 | LONGEST longest = value_as_long (arg2); |
a109c7c1 | 516 | |
4603e466 | 517 | if (addr_bit < sizeof (LONGEST) * HOST_CHAR_BIT) |
634acd5f | 518 | { |
4603e466 DT |
519 | if (longest >= ((LONGEST) 1 << addr_bit) |
520 | || longest <= -((LONGEST) 1 << addr_bit)) | |
8a3fe4f8 | 521 | warning (_("value truncated")); |
634acd5f AC |
522 | } |
523 | return value_from_longest (type, longest); | |
524 | } | |
0d5de010 DJ |
525 | else if (code1 == TYPE_CODE_METHODPTR && code2 == TYPE_CODE_INT |
526 | && value_as_long (arg2) == 0) | |
527 | { | |
528 | struct value *result = allocate_value (type); | |
a109c7c1 | 529 | |
ad4820ab | 530 | cplus_make_method_ptr (type, value_contents_writeable (result), 0, 0); |
0d5de010 DJ |
531 | return result; |
532 | } | |
533 | else if (code1 == TYPE_CODE_MEMBERPTR && code2 == TYPE_CODE_INT | |
534 | && value_as_long (arg2) == 0) | |
535 | { | |
536 | /* The Itanium C++ ABI represents NULL pointers to members as | |
537 | minus one, instead of biasing the normal case. */ | |
538 | return value_from_longest (type, -1); | |
539 | } | |
c906108c SS |
540 | else if (TYPE_LENGTH (type) == TYPE_LENGTH (type2)) |
541 | { | |
542 | if (code1 == TYPE_CODE_PTR && code2 == TYPE_CODE_PTR) | |
fb933624 DJ |
543 | return value_cast_pointers (type, arg2); |
544 | ||
0d5de010 | 545 | arg2 = value_copy (arg2); |
04624583 | 546 | deprecated_set_value_type (arg2, type); |
2b127877 | 547 | arg2 = value_change_enclosing_type (arg2, type); |
b44d461b | 548 | set_value_pointed_to_offset (arg2, 0); /* pai: chk_val */ |
c906108c SS |
549 | return arg2; |
550 | } | |
c906108c | 551 | else if (VALUE_LVAL (arg2) == lval_memory) |
42ae5230 | 552 | return value_at_lazy (type, value_address (arg2)); |
c906108c SS |
553 | else if (code1 == TYPE_CODE_VOID) |
554 | { | |
48319d1f | 555 | return value_zero (type, not_lval); |
c906108c SS |
556 | } |
557 | else | |
558 | { | |
8a3fe4f8 | 559 | error (_("Invalid cast.")); |
c906108c SS |
560 | return 0; |
561 | } | |
562 | } | |
563 | ||
4e8f195d TT |
564 | /* The C++ reinterpret_cast operator. */ |
565 | ||
566 | struct value * | |
567 | value_reinterpret_cast (struct type *type, struct value *arg) | |
568 | { | |
569 | struct value *result; | |
570 | struct type *real_type = check_typedef (type); | |
571 | struct type *arg_type, *dest_type; | |
572 | int is_ref = 0; | |
573 | enum type_code dest_code, arg_code; | |
574 | ||
575 | /* Do reference, function, and array conversion. */ | |
576 | arg = coerce_array (arg); | |
577 | ||
578 | /* Attempt to preserve the type the user asked for. */ | |
579 | dest_type = type; | |
580 | ||
581 | /* If we are casting to a reference type, transform | |
582 | reinterpret_cast<T&>(V) to *reinterpret_cast<T*>(&V). */ | |
583 | if (TYPE_CODE (real_type) == TYPE_CODE_REF) | |
584 | { | |
585 | is_ref = 1; | |
586 | arg = value_addr (arg); | |
587 | dest_type = lookup_pointer_type (TYPE_TARGET_TYPE (dest_type)); | |
588 | real_type = lookup_pointer_type (real_type); | |
589 | } | |
590 | ||
591 | arg_type = value_type (arg); | |
592 | ||
593 | dest_code = TYPE_CODE (real_type); | |
594 | arg_code = TYPE_CODE (arg_type); | |
595 | ||
596 | /* We can convert pointer types, or any pointer type to int, or int | |
597 | type to pointer. */ | |
598 | if ((dest_code == TYPE_CODE_PTR && arg_code == TYPE_CODE_INT) | |
599 | || (dest_code == TYPE_CODE_INT && arg_code == TYPE_CODE_PTR) | |
600 | || (dest_code == TYPE_CODE_METHODPTR && arg_code == TYPE_CODE_INT) | |
601 | || (dest_code == TYPE_CODE_INT && arg_code == TYPE_CODE_METHODPTR) | |
602 | || (dest_code == TYPE_CODE_MEMBERPTR && arg_code == TYPE_CODE_INT) | |
603 | || (dest_code == TYPE_CODE_INT && arg_code == TYPE_CODE_MEMBERPTR) | |
604 | || (dest_code == arg_code | |
605 | && (dest_code == TYPE_CODE_PTR | |
606 | || dest_code == TYPE_CODE_METHODPTR | |
607 | || dest_code == TYPE_CODE_MEMBERPTR))) | |
608 | result = value_cast (dest_type, arg); | |
609 | else | |
610 | error (_("Invalid reinterpret_cast")); | |
611 | ||
612 | if (is_ref) | |
613 | result = value_cast (type, value_ref (value_ind (result))); | |
614 | ||
615 | return result; | |
616 | } | |
617 | ||
618 | /* A helper for value_dynamic_cast. This implements the first of two | |
619 | runtime checks: we iterate over all the base classes of the value's | |
620 | class which are equal to the desired class; if only one of these | |
621 | holds the value, then it is the answer. */ | |
622 | ||
623 | static int | |
624 | dynamic_cast_check_1 (struct type *desired_type, | |
625 | const bfd_byte *contents, | |
626 | CORE_ADDR address, | |
627 | struct type *search_type, | |
628 | CORE_ADDR arg_addr, | |
629 | struct type *arg_type, | |
630 | struct value **result) | |
631 | { | |
632 | int i, result_count = 0; | |
633 | ||
634 | for (i = 0; i < TYPE_N_BASECLASSES (search_type) && result_count < 2; ++i) | |
635 | { | |
636 | int offset = baseclass_offset (search_type, i, contents, address); | |
a109c7c1 | 637 | |
4e8f195d TT |
638 | if (offset == -1) |
639 | error (_("virtual baseclass botch")); | |
640 | if (class_types_same_p (desired_type, TYPE_BASECLASS (search_type, i))) | |
641 | { | |
642 | if (address + offset >= arg_addr | |
643 | && address + offset < arg_addr + TYPE_LENGTH (arg_type)) | |
644 | { | |
645 | ++result_count; | |
646 | if (!*result) | |
647 | *result = value_at_lazy (TYPE_BASECLASS (search_type, i), | |
648 | address + offset); | |
649 | } | |
650 | } | |
651 | else | |
652 | result_count += dynamic_cast_check_1 (desired_type, | |
653 | contents + offset, | |
654 | address + offset, | |
655 | TYPE_BASECLASS (search_type, i), | |
656 | arg_addr, | |
657 | arg_type, | |
658 | result); | |
659 | } | |
660 | ||
661 | return result_count; | |
662 | } | |
663 | ||
664 | /* A helper for value_dynamic_cast. This implements the second of two | |
665 | runtime checks: we look for a unique public sibling class of the | |
666 | argument's declared class. */ | |
667 | ||
668 | static int | |
669 | dynamic_cast_check_2 (struct type *desired_type, | |
670 | const bfd_byte *contents, | |
671 | CORE_ADDR address, | |
672 | struct type *search_type, | |
673 | struct value **result) | |
674 | { | |
675 | int i, result_count = 0; | |
676 | ||
677 | for (i = 0; i < TYPE_N_BASECLASSES (search_type) && result_count < 2; ++i) | |
678 | { | |
679 | int offset; | |
680 | ||
681 | if (! BASETYPE_VIA_PUBLIC (search_type, i)) | |
682 | continue; | |
683 | ||
684 | offset = baseclass_offset (search_type, i, contents, address); | |
685 | if (offset == -1) | |
686 | error (_("virtual baseclass botch")); | |
687 | if (class_types_same_p (desired_type, TYPE_BASECLASS (search_type, i))) | |
688 | { | |
689 | ++result_count; | |
690 | if (*result == NULL) | |
691 | *result = value_at_lazy (TYPE_BASECLASS (search_type, i), | |
692 | address + offset); | |
693 | } | |
694 | else | |
695 | result_count += dynamic_cast_check_2 (desired_type, | |
696 | contents + offset, | |
697 | address + offset, | |
698 | TYPE_BASECLASS (search_type, i), | |
699 | result); | |
700 | } | |
701 | ||
702 | return result_count; | |
703 | } | |
704 | ||
705 | /* The C++ dynamic_cast operator. */ | |
706 | ||
707 | struct value * | |
708 | value_dynamic_cast (struct type *type, struct value *arg) | |
709 | { | |
8f78b329 | 710 | int full, top, using_enc; |
4e8f195d TT |
711 | struct type *resolved_type = check_typedef (type); |
712 | struct type *arg_type = check_typedef (value_type (arg)); | |
713 | struct type *class_type, *rtti_type; | |
714 | struct value *result, *tem, *original_arg = arg; | |
715 | CORE_ADDR addr; | |
716 | int is_ref = TYPE_CODE (resolved_type) == TYPE_CODE_REF; | |
717 | ||
718 | if (TYPE_CODE (resolved_type) != TYPE_CODE_PTR | |
719 | && TYPE_CODE (resolved_type) != TYPE_CODE_REF) | |
720 | error (_("Argument to dynamic_cast must be a pointer or reference type")); | |
721 | if (TYPE_CODE (TYPE_TARGET_TYPE (resolved_type)) != TYPE_CODE_VOID | |
722 | && TYPE_CODE (TYPE_TARGET_TYPE (resolved_type)) != TYPE_CODE_CLASS) | |
723 | error (_("Argument to dynamic_cast must be pointer to class or `void *'")); | |
724 | ||
725 | class_type = check_typedef (TYPE_TARGET_TYPE (resolved_type)); | |
726 | if (TYPE_CODE (resolved_type) == TYPE_CODE_PTR) | |
727 | { | |
728 | if (TYPE_CODE (arg_type) != TYPE_CODE_PTR | |
729 | && ! (TYPE_CODE (arg_type) == TYPE_CODE_INT | |
730 | && value_as_long (arg) == 0)) | |
731 | error (_("Argument to dynamic_cast does not have pointer type")); | |
732 | if (TYPE_CODE (arg_type) == TYPE_CODE_PTR) | |
733 | { | |
734 | arg_type = check_typedef (TYPE_TARGET_TYPE (arg_type)); | |
735 | if (TYPE_CODE (arg_type) != TYPE_CODE_CLASS) | |
736 | error (_("Argument to dynamic_cast does not have pointer to class type")); | |
737 | } | |
738 | ||
739 | /* Handle NULL pointers. */ | |
740 | if (value_as_long (arg) == 0) | |
741 | return value_zero (type, not_lval); | |
742 | ||
743 | arg = value_ind (arg); | |
744 | } | |
745 | else | |
746 | { | |
747 | if (TYPE_CODE (arg_type) != TYPE_CODE_CLASS) | |
748 | error (_("Argument to dynamic_cast does not have class type")); | |
749 | } | |
750 | ||
751 | /* If the classes are the same, just return the argument. */ | |
752 | if (class_types_same_p (class_type, arg_type)) | |
753 | return value_cast (type, arg); | |
754 | ||
755 | /* If the target type is a unique base class of the argument's | |
756 | declared type, just cast it. */ | |
757 | if (is_ancestor (class_type, arg_type)) | |
758 | { | |
759 | if (is_unique_ancestor (class_type, arg)) | |
760 | return value_cast (type, original_arg); | |
761 | error (_("Ambiguous dynamic_cast")); | |
762 | } | |
763 | ||
764 | rtti_type = value_rtti_type (arg, &full, &top, &using_enc); | |
765 | if (! rtti_type) | |
766 | error (_("Couldn't determine value's most derived type for dynamic_cast")); | |
767 | ||
768 | /* Compute the most derived object's address. */ | |
769 | addr = value_address (arg); | |
770 | if (full) | |
771 | { | |
772 | /* Done. */ | |
773 | } | |
774 | else if (using_enc) | |
775 | addr += top; | |
776 | else | |
777 | addr += top + value_embedded_offset (arg); | |
778 | ||
779 | /* dynamic_cast<void *> means to return a pointer to the | |
780 | most-derived object. */ | |
781 | if (TYPE_CODE (resolved_type) == TYPE_CODE_PTR | |
782 | && TYPE_CODE (TYPE_TARGET_TYPE (resolved_type)) == TYPE_CODE_VOID) | |
783 | return value_at_lazy (type, addr); | |
784 | ||
785 | tem = value_at (type, addr); | |
786 | ||
787 | /* The first dynamic check specified in 5.2.7. */ | |
788 | if (is_public_ancestor (arg_type, TYPE_TARGET_TYPE (resolved_type))) | |
789 | { | |
790 | if (class_types_same_p (rtti_type, TYPE_TARGET_TYPE (resolved_type))) | |
791 | return tem; | |
792 | result = NULL; | |
793 | if (dynamic_cast_check_1 (TYPE_TARGET_TYPE (resolved_type), | |
794 | value_contents (tem), value_address (tem), | |
795 | rtti_type, addr, | |
796 | arg_type, | |
797 | &result) == 1) | |
798 | return value_cast (type, | |
799 | is_ref ? value_ref (result) : value_addr (result)); | |
800 | } | |
801 | ||
802 | /* The second dynamic check specified in 5.2.7. */ | |
803 | result = NULL; | |
804 | if (is_public_ancestor (arg_type, rtti_type) | |
805 | && dynamic_cast_check_2 (TYPE_TARGET_TYPE (resolved_type), | |
806 | value_contents (tem), value_address (tem), | |
807 | rtti_type, &result) == 1) | |
808 | return value_cast (type, | |
809 | is_ref ? value_ref (result) : value_addr (result)); | |
810 | ||
811 | if (TYPE_CODE (resolved_type) == TYPE_CODE_PTR) | |
812 | return value_zero (type, not_lval); | |
813 | ||
814 | error (_("dynamic_cast failed")); | |
815 | } | |
816 | ||
c906108c SS |
817 | /* Create a value of type TYPE that is zero, and return it. */ |
818 | ||
f23631e4 | 819 | struct value * |
fba45db2 | 820 | value_zero (struct type *type, enum lval_type lv) |
c906108c | 821 | { |
f23631e4 | 822 | struct value *val = allocate_value (type); |
c906108c | 823 | |
a109c7c1 | 824 | VALUE_LVAL (val) = lv; |
c906108c SS |
825 | return val; |
826 | } | |
827 | ||
301f0ecf DE |
828 | /* Create a value of numeric type TYPE that is one, and return it. */ |
829 | ||
830 | struct value * | |
831 | value_one (struct type *type, enum lval_type lv) | |
832 | { | |
833 | struct type *type1 = check_typedef (type); | |
4e608b4f | 834 | struct value *val; |
301f0ecf DE |
835 | |
836 | if (TYPE_CODE (type1) == TYPE_CODE_DECFLOAT) | |
837 | { | |
e17a4113 | 838 | enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (type)); |
301f0ecf | 839 | gdb_byte v[16]; |
a109c7c1 | 840 | |
e17a4113 | 841 | decimal_from_string (v, TYPE_LENGTH (type), byte_order, "1"); |
301f0ecf DE |
842 | val = value_from_decfloat (type, v); |
843 | } | |
844 | else if (TYPE_CODE (type1) == TYPE_CODE_FLT) | |
845 | { | |
846 | val = value_from_double (type, (DOUBLEST) 1); | |
847 | } | |
848 | else if (is_integral_type (type1)) | |
849 | { | |
850 | val = value_from_longest (type, (LONGEST) 1); | |
851 | } | |
852 | else | |
853 | { | |
854 | error (_("Not a numeric type.")); | |
855 | } | |
856 | ||
857 | VALUE_LVAL (val) = lv; | |
858 | return val; | |
859 | } | |
860 | ||
4e5d721f DE |
861 | /* Helper function for value_at, value_at_lazy, and value_at_lazy_stack. */ |
862 | ||
863 | static struct value * | |
864 | get_value_at (struct type *type, CORE_ADDR addr, int lazy) | |
865 | { | |
866 | struct value *val; | |
867 | ||
868 | if (TYPE_CODE (check_typedef (type)) == TYPE_CODE_VOID) | |
869 | error (_("Attempt to dereference a generic pointer.")); | |
870 | ||
871 | if (lazy) | |
872 | { | |
873 | val = allocate_value_lazy (type); | |
874 | } | |
875 | else | |
876 | { | |
877 | val = allocate_value (type); | |
878 | read_memory (addr, value_contents_all_raw (val), TYPE_LENGTH (type)); | |
879 | } | |
880 | ||
881 | VALUE_LVAL (val) = lval_memory; | |
882 | set_value_address (val, addr); | |
883 | ||
884 | return val; | |
885 | } | |
886 | ||
070ad9f0 | 887 | /* Return a value with type TYPE located at ADDR. |
c906108c SS |
888 | |
889 | Call value_at only if the data needs to be fetched immediately; | |
890 | if we can be 'lazy' and defer the fetch, perhaps indefinately, call | |
891 | value_at_lazy instead. value_at_lazy simply records the address of | |
070ad9f0 | 892 | the data and sets the lazy-evaluation-required flag. The lazy flag |
0fd88904 | 893 | is tested in the value_contents macro, which is used if and when |
070ad9f0 | 894 | the contents are actually required. |
c906108c SS |
895 | |
896 | Note: value_at does *NOT* handle embedded offsets; perform such | |
ac3eeb49 | 897 | adjustments before or after calling it. */ |
c906108c | 898 | |
f23631e4 | 899 | struct value * |
00a4c844 | 900 | value_at (struct type *type, CORE_ADDR addr) |
c906108c | 901 | { |
4e5d721f | 902 | return get_value_at (type, addr, 0); |
c906108c SS |
903 | } |
904 | ||
905 | /* Return a lazy value with type TYPE located at ADDR (cf. value_at). */ | |
906 | ||
f23631e4 | 907 | struct value * |
00a4c844 | 908 | value_at_lazy (struct type *type, CORE_ADDR addr) |
c906108c | 909 | { |
4e5d721f | 910 | return get_value_at (type, addr, 1); |
c906108c SS |
911 | } |
912 | ||
0fd88904 | 913 | /* Called only from the value_contents and value_contents_all() |
46615f07 | 914 | macros, if the current data for a variable needs to be loaded into |
0fd88904 | 915 | value_contents(VAL). Fetches the data from the user's process, and |
46615f07 AC |
916 | clears the lazy flag to indicate that the data in the buffer is |
917 | valid. | |
c906108c | 918 | |
ac3eeb49 MS |
919 | If the value is zero-length, we avoid calling read_memory, which |
920 | would abort. We mark the value as fetched anyway -- all 0 bytes of | |
921 | it. | |
c906108c | 922 | |
ac3eeb49 MS |
923 | This function returns a value because it is used in the |
924 | value_contents macro as part of an expression, where a void would | |
925 | not work. The value is ignored. */ | |
c906108c SS |
926 | |
927 | int | |
f23631e4 | 928 | value_fetch_lazy (struct value *val) |
c906108c | 929 | { |
3e3d7139 JG |
930 | gdb_assert (value_lazy (val)); |
931 | allocate_value_contents (val); | |
4ea48cc1 DJ |
932 | if (value_bitsize (val)) |
933 | { | |
934 | /* To read a lazy bitfield, read the entire enclosing value. This | |
935 | prevents reading the same block of (possibly volatile) memory once | |
936 | per bitfield. It would be even better to read only the containing | |
937 | word, but we have no way to record that just specific bits of a | |
938 | value have been fetched. */ | |
939 | struct type *type = check_typedef (value_type (val)); | |
940 | enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (type)); | |
941 | struct value *parent = value_parent (val); | |
942 | LONGEST offset = value_offset (val); | |
943 | LONGEST num = unpack_bits_as_long (value_type (val), | |
0e03807e TT |
944 | (value_contents_for_printing (parent) |
945 | + offset), | |
4ea48cc1 DJ |
946 | value_bitpos (val), |
947 | value_bitsize (val)); | |
948 | int length = TYPE_LENGTH (type); | |
a109c7c1 | 949 | |
0e03807e TT |
950 | if (!value_bits_valid (val, |
951 | TARGET_CHAR_BIT * offset + value_bitpos (val), | |
952 | value_bitsize (val))) | |
953 | error (_("value has been optimized out")); | |
954 | ||
4ea48cc1 DJ |
955 | store_signed_integer (value_contents_raw (val), length, byte_order, num); |
956 | } | |
957 | else if (VALUE_LVAL (val) == lval_memory) | |
9214ee5f | 958 | { |
42ae5230 | 959 | CORE_ADDR addr = value_address (val); |
694182d2 | 960 | int length = TYPE_LENGTH (check_typedef (value_enclosing_type (val))); |
9214ee5f | 961 | |
9214ee5f | 962 | if (length) |
4e5d721f DE |
963 | { |
964 | if (value_stack (val)) | |
965 | read_stack (addr, value_contents_all_raw (val), length); | |
966 | else | |
967 | read_memory (addr, value_contents_all_raw (val), length); | |
968 | } | |
9214ee5f DJ |
969 | } |
970 | else if (VALUE_LVAL (val) == lval_register) | |
971 | { | |
669fac23 DJ |
972 | struct frame_info *frame; |
973 | int regnum; | |
9214ee5f | 974 | struct type *type = check_typedef (value_type (val)); |
669fac23 | 975 | struct value *new_val = val, *mark = value_mark (); |
c906108c | 976 | |
669fac23 DJ |
977 | /* Offsets are not supported here; lazy register values must |
978 | refer to the entire register. */ | |
979 | gdb_assert (value_offset (val) == 0); | |
9214ee5f | 980 | |
669fac23 DJ |
981 | while (VALUE_LVAL (new_val) == lval_register && value_lazy (new_val)) |
982 | { | |
983 | frame = frame_find_by_id (VALUE_FRAME_ID (new_val)); | |
984 | regnum = VALUE_REGNUM (new_val); | |
985 | ||
986 | gdb_assert (frame != NULL); | |
9214ee5f | 987 | |
669fac23 DJ |
988 | /* Convertible register routines are used for multi-register |
989 | values and for interpretation in different types | |
990 | (e.g. float or int from a double register). Lazy | |
991 | register values should have the register's natural type, | |
992 | so they do not apply. */ | |
993 | gdb_assert (!gdbarch_convert_register_p (get_frame_arch (frame), | |
994 | regnum, type)); | |
995 | ||
996 | new_val = get_frame_register_value (frame, regnum); | |
997 | } | |
998 | ||
999 | /* If it's still lazy (for instance, a saved register on the | |
1000 | stack), fetch it. */ | |
1001 | if (value_lazy (new_val)) | |
1002 | value_fetch_lazy (new_val); | |
1003 | ||
1004 | /* If the register was not saved, mark it unavailable. */ | |
1005 | if (value_optimized_out (new_val)) | |
9214ee5f | 1006 | set_value_optimized_out (val, 1); |
669fac23 DJ |
1007 | else |
1008 | memcpy (value_contents_raw (val), value_contents (new_val), | |
1009 | TYPE_LENGTH (type)); | |
1010 | ||
1011 | if (frame_debug) | |
1012 | { | |
029a67e4 | 1013 | struct gdbarch *gdbarch; |
669fac23 DJ |
1014 | frame = frame_find_by_id (VALUE_FRAME_ID (val)); |
1015 | regnum = VALUE_REGNUM (val); | |
029a67e4 | 1016 | gdbarch = get_frame_arch (frame); |
669fac23 DJ |
1017 | |
1018 | fprintf_unfiltered (gdb_stdlog, "\ | |
1019 | { value_fetch_lazy (frame=%d,regnum=%d(%s),...) ", | |
1020 | frame_relative_level (frame), regnum, | |
029a67e4 | 1021 | user_reg_map_regnum_to_name (gdbarch, regnum)); |
669fac23 DJ |
1022 | |
1023 | fprintf_unfiltered (gdb_stdlog, "->"); | |
1024 | if (value_optimized_out (new_val)) | |
1025 | fprintf_unfiltered (gdb_stdlog, " optimized out"); | |
1026 | else | |
1027 | { | |
1028 | int i; | |
1029 | const gdb_byte *buf = value_contents (new_val); | |
1030 | ||
1031 | if (VALUE_LVAL (new_val) == lval_register) | |
1032 | fprintf_unfiltered (gdb_stdlog, " register=%d", | |
1033 | VALUE_REGNUM (new_val)); | |
1034 | else if (VALUE_LVAL (new_val) == lval_memory) | |
5af949e3 UW |
1035 | fprintf_unfiltered (gdb_stdlog, " address=%s", |
1036 | paddress (gdbarch, | |
1037 | value_address (new_val))); | |
669fac23 DJ |
1038 | else |
1039 | fprintf_unfiltered (gdb_stdlog, " computed"); | |
1040 | ||
1041 | fprintf_unfiltered (gdb_stdlog, " bytes="); | |
1042 | fprintf_unfiltered (gdb_stdlog, "["); | |
029a67e4 | 1043 | for (i = 0; i < register_size (gdbarch, regnum); i++) |
669fac23 DJ |
1044 | fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]); |
1045 | fprintf_unfiltered (gdb_stdlog, "]"); | |
1046 | } | |
1047 | ||
1048 | fprintf_unfiltered (gdb_stdlog, " }\n"); | |
1049 | } | |
1050 | ||
1051 | /* Dispose of the intermediate values. This prevents | |
1052 | watchpoints from trying to watch the saved frame pointer. */ | |
1053 | value_free_to_mark (mark); | |
9214ee5f | 1054 | } |
5f5233d4 PA |
1055 | else if (VALUE_LVAL (val) == lval_computed) |
1056 | value_computed_funcs (val)->read (val); | |
9214ee5f DJ |
1057 | else |
1058 | internal_error (__FILE__, __LINE__, "Unexpected lazy value type."); | |
802db21b | 1059 | |
dfa52d88 | 1060 | set_value_lazy (val, 0); |
c906108c SS |
1061 | return 0; |
1062 | } | |
1063 | ||
1064 | ||
1065 | /* Store the contents of FROMVAL into the location of TOVAL. | |
1066 | Return a new value with the location of TOVAL and contents of FROMVAL. */ | |
1067 | ||
f23631e4 AC |
1068 | struct value * |
1069 | value_assign (struct value *toval, struct value *fromval) | |
c906108c | 1070 | { |
52f0bd74 | 1071 | struct type *type; |
f23631e4 | 1072 | struct value *val; |
cb741690 | 1073 | struct frame_id old_frame; |
c906108c | 1074 | |
88e3b34b | 1075 | if (!deprecated_value_modifiable (toval)) |
8a3fe4f8 | 1076 | error (_("Left operand of assignment is not a modifiable lvalue.")); |
c906108c | 1077 | |
994b9211 | 1078 | toval = coerce_ref (toval); |
c906108c | 1079 | |
df407dfe | 1080 | type = value_type (toval); |
c906108c | 1081 | if (VALUE_LVAL (toval) != lval_internalvar) |
3cbaedff | 1082 | fromval = value_cast (type, fromval); |
c906108c | 1083 | else |
63092375 DJ |
1084 | { |
1085 | /* Coerce arrays and functions to pointers, except for arrays | |
1086 | which only live in GDB's storage. */ | |
1087 | if (!value_must_coerce_to_target (fromval)) | |
1088 | fromval = coerce_array (fromval); | |
1089 | } | |
1090 | ||
c906108c SS |
1091 | CHECK_TYPEDEF (type); |
1092 | ||
ac3eeb49 MS |
1093 | /* Since modifying a register can trash the frame chain, and |
1094 | modifying memory can trash the frame cache, we save the old frame | |
1095 | and then restore the new frame afterwards. */ | |
206415a3 | 1096 | old_frame = get_frame_id (deprecated_safe_get_selected_frame ()); |
cb741690 | 1097 | |
c906108c SS |
1098 | switch (VALUE_LVAL (toval)) |
1099 | { | |
1100 | case lval_internalvar: | |
1101 | set_internalvar (VALUE_INTERNALVAR (toval), fromval); | |
4fa62494 | 1102 | val = value_copy (fromval); |
ac3eeb49 MS |
1103 | val = value_change_enclosing_type (val, |
1104 | value_enclosing_type (fromval)); | |
13c3b5f5 | 1105 | set_value_embedded_offset (val, value_embedded_offset (fromval)); |
ac3eeb49 MS |
1106 | set_value_pointed_to_offset (val, |
1107 | value_pointed_to_offset (fromval)); | |
c906108c SS |
1108 | return val; |
1109 | ||
1110 | case lval_internalvar_component: | |
1111 | set_internalvar_component (VALUE_INTERNALVAR (toval), | |
df407dfe AC |
1112 | value_offset (toval), |
1113 | value_bitpos (toval), | |
1114 | value_bitsize (toval), | |
c906108c SS |
1115 | fromval); |
1116 | break; | |
1117 | ||
1118 | case lval_memory: | |
1119 | { | |
fc1a4b47 | 1120 | const gdb_byte *dest_buffer; |
c5aa993b JM |
1121 | CORE_ADDR changed_addr; |
1122 | int changed_len; | |
10c42a71 | 1123 | gdb_byte buffer[sizeof (LONGEST)]; |
c906108c | 1124 | |
df407dfe | 1125 | if (value_bitsize (toval)) |
c5aa993b | 1126 | { |
2d88202a | 1127 | struct value *parent = value_parent (toval); |
2d88202a | 1128 | |
a109c7c1 | 1129 | changed_addr = value_address (parent) + value_offset (toval); |
df407dfe AC |
1130 | changed_len = (value_bitpos (toval) |
1131 | + value_bitsize (toval) | |
c5aa993b JM |
1132 | + HOST_CHAR_BIT - 1) |
1133 | / HOST_CHAR_BIT; | |
c906108c | 1134 | |
4ea48cc1 DJ |
1135 | /* If we can read-modify-write exactly the size of the |
1136 | containing type (e.g. short or int) then do so. This | |
1137 | is safer for volatile bitfields mapped to hardware | |
1138 | registers. */ | |
1139 | if (changed_len < TYPE_LENGTH (type) | |
1140 | && TYPE_LENGTH (type) <= (int) sizeof (LONGEST) | |
2d88202a | 1141 | && ((LONGEST) changed_addr % TYPE_LENGTH (type)) == 0) |
4ea48cc1 DJ |
1142 | changed_len = TYPE_LENGTH (type); |
1143 | ||
c906108c | 1144 | if (changed_len > (int) sizeof (LONGEST)) |
8a3fe4f8 | 1145 | error (_("Can't handle bitfields which don't fit in a %d bit word."), |
baa6f10b | 1146 | (int) sizeof (LONGEST) * HOST_CHAR_BIT); |
c906108c | 1147 | |
2d88202a | 1148 | read_memory (changed_addr, buffer, changed_len); |
50810684 | 1149 | modify_field (type, buffer, value_as_long (fromval), |
df407dfe | 1150 | value_bitpos (toval), value_bitsize (toval)); |
c906108c SS |
1151 | dest_buffer = buffer; |
1152 | } | |
c906108c SS |
1153 | else |
1154 | { | |
42ae5230 | 1155 | changed_addr = value_address (toval); |
c906108c | 1156 | changed_len = TYPE_LENGTH (type); |
0fd88904 | 1157 | dest_buffer = value_contents (fromval); |
c906108c SS |
1158 | } |
1159 | ||
1160 | write_memory (changed_addr, dest_buffer, changed_len); | |
8cebebb9 PP |
1161 | observer_notify_memory_changed (changed_addr, changed_len, |
1162 | dest_buffer); | |
c906108c SS |
1163 | } |
1164 | break; | |
1165 | ||
492254e9 | 1166 | case lval_register: |
c906108c | 1167 | { |
c906108c | 1168 | struct frame_info *frame; |
d80b854b | 1169 | struct gdbarch *gdbarch; |
ff2e87ac | 1170 | int value_reg; |
c906108c SS |
1171 | |
1172 | /* Figure out which frame this is in currently. */ | |
0c16dd26 AC |
1173 | frame = frame_find_by_id (VALUE_FRAME_ID (toval)); |
1174 | value_reg = VALUE_REGNUM (toval); | |
c906108c SS |
1175 | |
1176 | if (!frame) | |
8a3fe4f8 | 1177 | error (_("Value being assigned to is no longer active.")); |
d80b854b UW |
1178 | |
1179 | gdbarch = get_frame_arch (frame); | |
1180 | if (gdbarch_convert_register_p (gdbarch, VALUE_REGNUM (toval), type)) | |
492254e9 | 1181 | { |
ff2e87ac | 1182 | /* If TOVAL is a special machine register requiring |
ac3eeb49 MS |
1183 | conversion of program values to a special raw |
1184 | format. */ | |
d80b854b | 1185 | gdbarch_value_to_register (gdbarch, frame, |
ac3eeb49 MS |
1186 | VALUE_REGNUM (toval), type, |
1187 | value_contents (fromval)); | |
492254e9 | 1188 | } |
c906108c | 1189 | else |
492254e9 | 1190 | { |
df407dfe | 1191 | if (value_bitsize (toval)) |
00fa51f6 | 1192 | { |
2d88202a UW |
1193 | struct value *parent = value_parent (toval); |
1194 | int offset = value_offset (parent) + value_offset (toval); | |
00fa51f6 UW |
1195 | int changed_len; |
1196 | gdb_byte buffer[sizeof (LONGEST)]; | |
1197 | ||
1198 | changed_len = (value_bitpos (toval) | |
1199 | + value_bitsize (toval) | |
1200 | + HOST_CHAR_BIT - 1) | |
1201 | / HOST_CHAR_BIT; | |
1202 | ||
1203 | if (changed_len > (int) sizeof (LONGEST)) | |
1204 | error (_("Can't handle bitfields which don't fit in a %d bit word."), | |
1205 | (int) sizeof (LONGEST) * HOST_CHAR_BIT); | |
1206 | ||
2d88202a | 1207 | get_frame_register_bytes (frame, value_reg, offset, |
00fa51f6 UW |
1208 | changed_len, buffer); |
1209 | ||
50810684 UW |
1210 | modify_field (type, buffer, value_as_long (fromval), |
1211 | value_bitpos (toval), value_bitsize (toval)); | |
00fa51f6 | 1212 | |
2d88202a | 1213 | put_frame_register_bytes (frame, value_reg, offset, |
00fa51f6 UW |
1214 | changed_len, buffer); |
1215 | } | |
c906108c | 1216 | else |
00fa51f6 UW |
1217 | { |
1218 | put_frame_register_bytes (frame, value_reg, | |
1219 | value_offset (toval), | |
1220 | TYPE_LENGTH (type), | |
1221 | value_contents (fromval)); | |
1222 | } | |
ff2e87ac | 1223 | } |
00fa51f6 | 1224 | |
9a4105ab AC |
1225 | if (deprecated_register_changed_hook) |
1226 | deprecated_register_changed_hook (-1); | |
f4c5303c | 1227 | observer_notify_target_changed (¤t_target); |
ff2e87ac | 1228 | break; |
c906108c | 1229 | } |
5f5233d4 PA |
1230 | |
1231 | case lval_computed: | |
1232 | { | |
1233 | struct lval_funcs *funcs = value_computed_funcs (toval); | |
1234 | ||
1235 | funcs->write (toval, fromval); | |
1236 | } | |
1237 | break; | |
1238 | ||
c906108c | 1239 | default: |
8a3fe4f8 | 1240 | error (_("Left operand of assignment is not an lvalue.")); |
c906108c SS |
1241 | } |
1242 | ||
cb741690 DJ |
1243 | /* Assigning to the stack pointer, frame pointer, and other |
1244 | (architecture and calling convention specific) registers may | |
1245 | cause the frame cache to be out of date. Assigning to memory | |
1246 | also can. We just do this on all assignments to registers or | |
1247 | memory, for simplicity's sake; I doubt the slowdown matters. */ | |
1248 | switch (VALUE_LVAL (toval)) | |
1249 | { | |
1250 | case lval_memory: | |
1251 | case lval_register: | |
0e03807e | 1252 | case lval_computed: |
cb741690 DJ |
1253 | |
1254 | reinit_frame_cache (); | |
1255 | ||
ac3eeb49 MS |
1256 | /* Having destroyed the frame cache, restore the selected |
1257 | frame. */ | |
cb741690 DJ |
1258 | |
1259 | /* FIXME: cagney/2002-11-02: There has to be a better way of | |
1260 | doing this. Instead of constantly saving/restoring the | |
1261 | frame. Why not create a get_selected_frame() function that, | |
1262 | having saved the selected frame's ID can automatically | |
1263 | re-find the previously selected frame automatically. */ | |
1264 | ||
1265 | { | |
1266 | struct frame_info *fi = frame_find_by_id (old_frame); | |
a109c7c1 | 1267 | |
cb741690 DJ |
1268 | if (fi != NULL) |
1269 | select_frame (fi); | |
1270 | } | |
1271 | ||
1272 | break; | |
1273 | default: | |
1274 | break; | |
1275 | } | |
1276 | ||
ac3eeb49 MS |
1277 | /* If the field does not entirely fill a LONGEST, then zero the sign |
1278 | bits. If the field is signed, and is negative, then sign | |
1279 | extend. */ | |
df407dfe AC |
1280 | if ((value_bitsize (toval) > 0) |
1281 | && (value_bitsize (toval) < 8 * (int) sizeof (LONGEST))) | |
c906108c SS |
1282 | { |
1283 | LONGEST fieldval = value_as_long (fromval); | |
df407dfe | 1284 | LONGEST valmask = (((ULONGEST) 1) << value_bitsize (toval)) - 1; |
c906108c SS |
1285 | |
1286 | fieldval &= valmask; | |
ac3eeb49 MS |
1287 | if (!TYPE_UNSIGNED (type) |
1288 | && (fieldval & (valmask ^ (valmask >> 1)))) | |
c906108c SS |
1289 | fieldval |= ~valmask; |
1290 | ||
1291 | fromval = value_from_longest (type, fieldval); | |
1292 | } | |
1293 | ||
1294 | val = value_copy (toval); | |
0fd88904 | 1295 | memcpy (value_contents_raw (val), value_contents (fromval), |
c906108c | 1296 | TYPE_LENGTH (type)); |
04624583 | 1297 | deprecated_set_value_type (val, type); |
ac3eeb49 MS |
1298 | val = value_change_enclosing_type (val, |
1299 | value_enclosing_type (fromval)); | |
13c3b5f5 | 1300 | set_value_embedded_offset (val, value_embedded_offset (fromval)); |
b44d461b | 1301 | set_value_pointed_to_offset (val, value_pointed_to_offset (fromval)); |
c5aa993b | 1302 | |
c906108c SS |
1303 | return val; |
1304 | } | |
1305 | ||
1306 | /* Extend a value VAL to COUNT repetitions of its type. */ | |
1307 | ||
f23631e4 AC |
1308 | struct value * |
1309 | value_repeat (struct value *arg1, int count) | |
c906108c | 1310 | { |
f23631e4 | 1311 | struct value *val; |
c906108c SS |
1312 | |
1313 | if (VALUE_LVAL (arg1) != lval_memory) | |
8a3fe4f8 | 1314 | error (_("Only values in memory can be extended with '@'.")); |
c906108c | 1315 | if (count < 1) |
8a3fe4f8 | 1316 | error (_("Invalid number %d of repetitions."), count); |
c906108c | 1317 | |
4754a64e | 1318 | val = allocate_repeat_value (value_enclosing_type (arg1), count); |
c906108c | 1319 | |
42ae5230 | 1320 | read_memory (value_address (arg1), |
990a07ab | 1321 | value_contents_all_raw (val), |
4754a64e | 1322 | TYPE_LENGTH (value_enclosing_type (val))); |
c906108c | 1323 | VALUE_LVAL (val) = lval_memory; |
42ae5230 | 1324 | set_value_address (val, value_address (arg1)); |
c906108c SS |
1325 | |
1326 | return val; | |
1327 | } | |
1328 | ||
f23631e4 | 1329 | struct value * |
fba45db2 | 1330 | value_of_variable (struct symbol *var, struct block *b) |
c906108c | 1331 | { |
f23631e4 | 1332 | struct value *val; |
61212c0f | 1333 | struct frame_info *frame; |
c906108c | 1334 | |
61212c0f UW |
1335 | if (!symbol_read_needs_frame (var)) |
1336 | frame = NULL; | |
1337 | else if (!b) | |
1338 | frame = get_selected_frame (_("No frame selected.")); | |
1339 | else | |
c906108c SS |
1340 | { |
1341 | frame = block_innermost_frame (b); | |
1342 | if (!frame) | |
c5aa993b | 1343 | { |
edb3359d | 1344 | if (BLOCK_FUNCTION (b) && !block_inlined_p (b) |
de5ad195 | 1345 | && SYMBOL_PRINT_NAME (BLOCK_FUNCTION (b))) |
8a3fe4f8 | 1346 | error (_("No frame is currently executing in block %s."), |
de5ad195 | 1347 | SYMBOL_PRINT_NAME (BLOCK_FUNCTION (b))); |
c906108c | 1348 | else |
8a3fe4f8 | 1349 | error (_("No frame is currently executing in specified block")); |
c5aa993b | 1350 | } |
c906108c SS |
1351 | } |
1352 | ||
1353 | val = read_var_value (var, frame); | |
1354 | if (!val) | |
8a3fe4f8 | 1355 | error (_("Address of symbol \"%s\" is unknown."), SYMBOL_PRINT_NAME (var)); |
c906108c SS |
1356 | |
1357 | return val; | |
1358 | } | |
1359 | ||
61212c0f UW |
1360 | struct value * |
1361 | address_of_variable (struct symbol *var, struct block *b) | |
1362 | { | |
1363 | struct type *type = SYMBOL_TYPE (var); | |
1364 | struct value *val; | |
1365 | ||
1366 | /* Evaluate it first; if the result is a memory address, we're fine. | |
1367 | Lazy evaluation pays off here. */ | |
1368 | ||
1369 | val = value_of_variable (var, b); | |
1370 | ||
1371 | if ((VALUE_LVAL (val) == lval_memory && value_lazy (val)) | |
1372 | || TYPE_CODE (type) == TYPE_CODE_FUNC) | |
1373 | { | |
42ae5230 | 1374 | CORE_ADDR addr = value_address (val); |
a109c7c1 | 1375 | |
61212c0f UW |
1376 | return value_from_pointer (lookup_pointer_type (type), addr); |
1377 | } | |
1378 | ||
1379 | /* Not a memory address; check what the problem was. */ | |
1380 | switch (VALUE_LVAL (val)) | |
1381 | { | |
1382 | case lval_register: | |
1383 | { | |
1384 | struct frame_info *frame; | |
1385 | const char *regname; | |
1386 | ||
1387 | frame = frame_find_by_id (VALUE_FRAME_ID (val)); | |
1388 | gdb_assert (frame); | |
1389 | ||
1390 | regname = gdbarch_register_name (get_frame_arch (frame), | |
1391 | VALUE_REGNUM (val)); | |
1392 | gdb_assert (regname && *regname); | |
1393 | ||
1394 | error (_("Address requested for identifier " | |
1395 | "\"%s\" which is in register $%s"), | |
1396 | SYMBOL_PRINT_NAME (var), regname); | |
1397 | break; | |
1398 | } | |
1399 | ||
1400 | default: | |
1401 | error (_("Can't take address of \"%s\" which isn't an lvalue."), | |
1402 | SYMBOL_PRINT_NAME (var)); | |
1403 | break; | |
1404 | } | |
1405 | ||
1406 | return val; | |
1407 | } | |
1408 | ||
63092375 DJ |
1409 | /* Return one if VAL does not live in target memory, but should in order |
1410 | to operate on it. Otherwise return zero. */ | |
1411 | ||
1412 | int | |
1413 | value_must_coerce_to_target (struct value *val) | |
1414 | { | |
1415 | struct type *valtype; | |
1416 | ||
1417 | /* The only lval kinds which do not live in target memory. */ | |
1418 | if (VALUE_LVAL (val) != not_lval | |
1419 | && VALUE_LVAL (val) != lval_internalvar) | |
1420 | return 0; | |
1421 | ||
1422 | valtype = check_typedef (value_type (val)); | |
1423 | ||
1424 | switch (TYPE_CODE (valtype)) | |
1425 | { | |
1426 | case TYPE_CODE_ARRAY: | |
3cbaedff | 1427 | return TYPE_VECTOR (valtype) ? 0 : 1; |
63092375 DJ |
1428 | case TYPE_CODE_STRING: |
1429 | return 1; | |
1430 | default: | |
1431 | return 0; | |
1432 | } | |
1433 | } | |
1434 | ||
1435 | /* Make sure that VAL lives in target memory if it's supposed to. For instance, | |
1436 | strings are constructed as character arrays in GDB's storage, and this | |
1437 | function copies them to the target. */ | |
1438 | ||
1439 | struct value * | |
1440 | value_coerce_to_target (struct value *val) | |
1441 | { | |
1442 | LONGEST length; | |
1443 | CORE_ADDR addr; | |
1444 | ||
1445 | if (!value_must_coerce_to_target (val)) | |
1446 | return val; | |
1447 | ||
1448 | length = TYPE_LENGTH (check_typedef (value_type (val))); | |
1449 | addr = allocate_space_in_inferior (length); | |
1450 | write_memory (addr, value_contents (val), length); | |
1451 | return value_at_lazy (value_type (val), addr); | |
1452 | } | |
1453 | ||
ac3eeb49 MS |
1454 | /* Given a value which is an array, return a value which is a pointer |
1455 | to its first element, regardless of whether or not the array has a | |
1456 | nonzero lower bound. | |
c906108c | 1457 | |
ac3eeb49 MS |
1458 | FIXME: A previous comment here indicated that this routine should |
1459 | be substracting the array's lower bound. It's not clear to me that | |
1460 | this is correct. Given an array subscripting operation, it would | |
1461 | certainly work to do the adjustment here, essentially computing: | |
c906108c SS |
1462 | |
1463 | (&array[0] - (lowerbound * sizeof array[0])) + (index * sizeof array[0]) | |
1464 | ||
ac3eeb49 MS |
1465 | However I believe a more appropriate and logical place to account |
1466 | for the lower bound is to do so in value_subscript, essentially | |
1467 | computing: | |
c906108c SS |
1468 | |
1469 | (&array[0] + ((index - lowerbound) * sizeof array[0])) | |
1470 | ||
ac3eeb49 MS |
1471 | As further evidence consider what would happen with operations |
1472 | other than array subscripting, where the caller would get back a | |
1473 | value that had an address somewhere before the actual first element | |
1474 | of the array, and the information about the lower bound would be | |
1475 | lost because of the coercion to pointer type. | |
c5aa993b | 1476 | */ |
c906108c | 1477 | |
f23631e4 AC |
1478 | struct value * |
1479 | value_coerce_array (struct value *arg1) | |
c906108c | 1480 | { |
df407dfe | 1481 | struct type *type = check_typedef (value_type (arg1)); |
c906108c | 1482 | |
63092375 DJ |
1483 | /* If the user tries to do something requiring a pointer with an |
1484 | array that has not yet been pushed to the target, then this would | |
1485 | be a good time to do so. */ | |
1486 | arg1 = value_coerce_to_target (arg1); | |
1487 | ||
c906108c | 1488 | if (VALUE_LVAL (arg1) != lval_memory) |
8a3fe4f8 | 1489 | error (_("Attempt to take address of value not located in memory.")); |
c906108c | 1490 | |
4478b372 | 1491 | return value_from_pointer (lookup_pointer_type (TYPE_TARGET_TYPE (type)), |
42ae5230 | 1492 | value_address (arg1)); |
c906108c SS |
1493 | } |
1494 | ||
1495 | /* Given a value which is a function, return a value which is a pointer | |
1496 | to it. */ | |
1497 | ||
f23631e4 AC |
1498 | struct value * |
1499 | value_coerce_function (struct value *arg1) | |
c906108c | 1500 | { |
f23631e4 | 1501 | struct value *retval; |
c906108c SS |
1502 | |
1503 | if (VALUE_LVAL (arg1) != lval_memory) | |
8a3fe4f8 | 1504 | error (_("Attempt to take address of value not located in memory.")); |
c906108c | 1505 | |
df407dfe | 1506 | retval = value_from_pointer (lookup_pointer_type (value_type (arg1)), |
42ae5230 | 1507 | value_address (arg1)); |
c906108c | 1508 | return retval; |
c5aa993b | 1509 | } |
c906108c | 1510 | |
ac3eeb49 MS |
1511 | /* Return a pointer value for the object for which ARG1 is the |
1512 | contents. */ | |
c906108c | 1513 | |
f23631e4 AC |
1514 | struct value * |
1515 | value_addr (struct value *arg1) | |
c906108c | 1516 | { |
f23631e4 | 1517 | struct value *arg2; |
df407dfe | 1518 | struct type *type = check_typedef (value_type (arg1)); |
a109c7c1 | 1519 | |
c906108c SS |
1520 | if (TYPE_CODE (type) == TYPE_CODE_REF) |
1521 | { | |
ac3eeb49 MS |
1522 | /* Copy the value, but change the type from (T&) to (T*). We |
1523 | keep the same location information, which is efficient, and | |
1524 | allows &(&X) to get the location containing the reference. */ | |
c906108c | 1525 | arg2 = value_copy (arg1); |
ac3eeb49 MS |
1526 | deprecated_set_value_type (arg2, |
1527 | lookup_pointer_type (TYPE_TARGET_TYPE (type))); | |
c906108c SS |
1528 | return arg2; |
1529 | } | |
1530 | if (TYPE_CODE (type) == TYPE_CODE_FUNC) | |
1531 | return value_coerce_function (arg1); | |
1532 | ||
63092375 DJ |
1533 | /* If this is an array that has not yet been pushed to the target, |
1534 | then this would be a good time to force it to memory. */ | |
1535 | arg1 = value_coerce_to_target (arg1); | |
1536 | ||
c906108c | 1537 | if (VALUE_LVAL (arg1) != lval_memory) |
8a3fe4f8 | 1538 | error (_("Attempt to take address of value not located in memory.")); |
c906108c | 1539 | |
c5aa993b | 1540 | /* Get target memory address */ |
df407dfe | 1541 | arg2 = value_from_pointer (lookup_pointer_type (value_type (arg1)), |
42ae5230 | 1542 | (value_address (arg1) |
13c3b5f5 | 1543 | + value_embedded_offset (arg1))); |
c906108c SS |
1544 | |
1545 | /* This may be a pointer to a base subobject; so remember the | |
ac3eeb49 | 1546 | full derived object's type ... */ |
4754a64e | 1547 | arg2 = value_change_enclosing_type (arg2, lookup_pointer_type (value_enclosing_type (arg1))); |
ac3eeb49 MS |
1548 | /* ... and also the relative position of the subobject in the full |
1549 | object. */ | |
b44d461b | 1550 | set_value_pointed_to_offset (arg2, value_embedded_offset (arg1)); |
c906108c SS |
1551 | return arg2; |
1552 | } | |
1553 | ||
ac3eeb49 MS |
1554 | /* Return a reference value for the object for which ARG1 is the |
1555 | contents. */ | |
fb933624 DJ |
1556 | |
1557 | struct value * | |
1558 | value_ref (struct value *arg1) | |
1559 | { | |
1560 | struct value *arg2; | |
fb933624 | 1561 | struct type *type = check_typedef (value_type (arg1)); |
a109c7c1 | 1562 | |
fb933624 DJ |
1563 | if (TYPE_CODE (type) == TYPE_CODE_REF) |
1564 | return arg1; | |
1565 | ||
1566 | arg2 = value_addr (arg1); | |
1567 | deprecated_set_value_type (arg2, lookup_reference_type (type)); | |
1568 | return arg2; | |
1569 | } | |
1570 | ||
ac3eeb49 MS |
1571 | /* Given a value of a pointer type, apply the C unary * operator to |
1572 | it. */ | |
c906108c | 1573 | |
f23631e4 AC |
1574 | struct value * |
1575 | value_ind (struct value *arg1) | |
c906108c SS |
1576 | { |
1577 | struct type *base_type; | |
f23631e4 | 1578 | struct value *arg2; |
c906108c | 1579 | |
994b9211 | 1580 | arg1 = coerce_array (arg1); |
c906108c | 1581 | |
df407dfe | 1582 | base_type = check_typedef (value_type (arg1)); |
c906108c | 1583 | |
22fe0fbb | 1584 | if (TYPE_CODE (base_type) == TYPE_CODE_PTR) |
c906108c SS |
1585 | { |
1586 | struct type *enc_type; | |
a109c7c1 | 1587 | |
ac3eeb49 MS |
1588 | /* We may be pointing to something embedded in a larger object. |
1589 | Get the real type of the enclosing object. */ | |
4754a64e | 1590 | enc_type = check_typedef (value_enclosing_type (arg1)); |
c906108c | 1591 | enc_type = TYPE_TARGET_TYPE (enc_type); |
0d5de010 DJ |
1592 | |
1593 | if (TYPE_CODE (check_typedef (enc_type)) == TYPE_CODE_FUNC | |
1594 | || TYPE_CODE (check_typedef (enc_type)) == TYPE_CODE_METHOD) | |
1595 | /* For functions, go through find_function_addr, which knows | |
1596 | how to handle function descriptors. */ | |
ac3eeb49 MS |
1597 | arg2 = value_at_lazy (enc_type, |
1598 | find_function_addr (arg1, NULL)); | |
0d5de010 DJ |
1599 | else |
1600 | /* Retrieve the enclosing object pointed to */ | |
ac3eeb49 MS |
1601 | arg2 = value_at_lazy (enc_type, |
1602 | (value_as_address (arg1) | |
1603 | - value_pointed_to_offset (arg1))); | |
0d5de010 | 1604 | |
ac3eeb49 | 1605 | /* Re-adjust type. */ |
04624583 | 1606 | deprecated_set_value_type (arg2, TYPE_TARGET_TYPE (base_type)); |
ac3eeb49 | 1607 | /* Add embedding info. */ |
2b127877 | 1608 | arg2 = value_change_enclosing_type (arg2, enc_type); |
b44d461b | 1609 | set_value_embedded_offset (arg2, value_pointed_to_offset (arg1)); |
c906108c | 1610 | |
ac3eeb49 | 1611 | /* We may be pointing to an object of some derived type. */ |
c906108c SS |
1612 | arg2 = value_full_object (arg2, NULL, 0, 0, 0); |
1613 | return arg2; | |
1614 | } | |
1615 | ||
8a3fe4f8 | 1616 | error (_("Attempt to take contents of a non-pointer value.")); |
ac3eeb49 | 1617 | return 0; /* For lint -- never reached. */ |
c906108c SS |
1618 | } |
1619 | \f | |
63092375 | 1620 | /* Create a value for an array by allocating space in GDB, copying |
ac3eeb49 MS |
1621 | copying the data into that space, and then setting up an array |
1622 | value. | |
c906108c | 1623 | |
ac3eeb49 MS |
1624 | The array bounds are set from LOWBOUND and HIGHBOUND, and the array |
1625 | is populated from the values passed in ELEMVEC. | |
c906108c SS |
1626 | |
1627 | The element type of the array is inherited from the type of the | |
1628 | first element, and all elements must have the same size (though we | |
ac3eeb49 | 1629 | don't currently enforce any restriction on their types). */ |
c906108c | 1630 | |
f23631e4 AC |
1631 | struct value * |
1632 | value_array (int lowbound, int highbound, struct value **elemvec) | |
c906108c SS |
1633 | { |
1634 | int nelem; | |
1635 | int idx; | |
1636 | unsigned int typelength; | |
f23631e4 | 1637 | struct value *val; |
c906108c | 1638 | struct type *arraytype; |
c906108c | 1639 | |
ac3eeb49 MS |
1640 | /* Validate that the bounds are reasonable and that each of the |
1641 | elements have the same size. */ | |
c906108c SS |
1642 | |
1643 | nelem = highbound - lowbound + 1; | |
1644 | if (nelem <= 0) | |
1645 | { | |
8a3fe4f8 | 1646 | error (_("bad array bounds (%d, %d)"), lowbound, highbound); |
c906108c | 1647 | } |
4754a64e | 1648 | typelength = TYPE_LENGTH (value_enclosing_type (elemvec[0])); |
c906108c SS |
1649 | for (idx = 1; idx < nelem; idx++) |
1650 | { | |
4754a64e | 1651 | if (TYPE_LENGTH (value_enclosing_type (elemvec[idx])) != typelength) |
c906108c | 1652 | { |
8a3fe4f8 | 1653 | error (_("array elements must all be the same size")); |
c906108c SS |
1654 | } |
1655 | } | |
1656 | ||
e3506a9f UW |
1657 | arraytype = lookup_array_range_type (value_enclosing_type (elemvec[0]), |
1658 | lowbound, highbound); | |
c906108c SS |
1659 | |
1660 | if (!current_language->c_style_arrays) | |
1661 | { | |
1662 | val = allocate_value (arraytype); | |
1663 | for (idx = 0; idx < nelem; idx++) | |
1664 | { | |
990a07ab | 1665 | memcpy (value_contents_all_raw (val) + (idx * typelength), |
46615f07 | 1666 | value_contents_all (elemvec[idx]), |
c906108c SS |
1667 | typelength); |
1668 | } | |
c906108c SS |
1669 | return val; |
1670 | } | |
1671 | ||
63092375 DJ |
1672 | /* Allocate space to store the array, and then initialize it by |
1673 | copying in each element. */ | |
c906108c | 1674 | |
63092375 | 1675 | val = allocate_value (arraytype); |
c906108c | 1676 | for (idx = 0; idx < nelem; idx++) |
63092375 DJ |
1677 | memcpy (value_contents_writeable (val) + (idx * typelength), |
1678 | value_contents_all (elemvec[idx]), | |
1679 | typelength); | |
1680 | return val; | |
c906108c SS |
1681 | } |
1682 | ||
6c7a06a3 | 1683 | struct value * |
3b7538c0 | 1684 | value_cstring (char *ptr, int len, struct type *char_type) |
6c7a06a3 TT |
1685 | { |
1686 | struct value *val; | |
1687 | int lowbound = current_language->string_lower_bound; | |
1688 | int highbound = len / TYPE_LENGTH (char_type); | |
6c7a06a3 | 1689 | struct type *stringtype |
e3506a9f | 1690 | = lookup_array_range_type (char_type, lowbound, highbound + lowbound - 1); |
6c7a06a3 TT |
1691 | |
1692 | val = allocate_value (stringtype); | |
1693 | memcpy (value_contents_raw (val), ptr, len); | |
1694 | return val; | |
1695 | } | |
1696 | ||
ac3eeb49 MS |
1697 | /* Create a value for a string constant by allocating space in the |
1698 | inferior, copying the data into that space, and returning the | |
1699 | address with type TYPE_CODE_STRING. PTR points to the string | |
1700 | constant data; LEN is number of characters. | |
1701 | ||
1702 | Note that string types are like array of char types with a lower | |
1703 | bound of zero and an upper bound of LEN - 1. Also note that the | |
1704 | string may contain embedded null bytes. */ | |
c906108c | 1705 | |
f23631e4 | 1706 | struct value * |
3b7538c0 | 1707 | value_string (char *ptr, int len, struct type *char_type) |
c906108c | 1708 | { |
f23631e4 | 1709 | struct value *val; |
c906108c | 1710 | int lowbound = current_language->string_lower_bound; |
3b7538c0 | 1711 | int highbound = len / TYPE_LENGTH (char_type); |
c906108c | 1712 | struct type *stringtype |
e3506a9f | 1713 | = lookup_string_range_type (char_type, lowbound, highbound + lowbound - 1); |
c906108c | 1714 | |
3b7538c0 UW |
1715 | val = allocate_value (stringtype); |
1716 | memcpy (value_contents_raw (val), ptr, len); | |
1717 | return val; | |
c906108c SS |
1718 | } |
1719 | ||
f23631e4 | 1720 | struct value * |
22601c15 | 1721 | value_bitstring (char *ptr, int len, struct type *index_type) |
c906108c | 1722 | { |
f23631e4 | 1723 | struct value *val; |
22601c15 UW |
1724 | struct type *domain_type |
1725 | = create_range_type (NULL, index_type, 0, len - 1); | |
1726 | struct type *type = create_set_type (NULL, domain_type); | |
a109c7c1 | 1727 | |
c906108c SS |
1728 | TYPE_CODE (type) = TYPE_CODE_BITSTRING; |
1729 | val = allocate_value (type); | |
990a07ab | 1730 | memcpy (value_contents_raw (val), ptr, TYPE_LENGTH (type)); |
c906108c SS |
1731 | return val; |
1732 | } | |
1733 | \f | |
ac3eeb49 MS |
1734 | /* See if we can pass arguments in T2 to a function which takes |
1735 | arguments of types T1. T1 is a list of NARGS arguments, and T2 is | |
1736 | a NULL-terminated vector. If some arguments need coercion of some | |
1737 | sort, then the coerced values are written into T2. Return value is | |
1738 | 0 if the arguments could be matched, or the position at which they | |
1739 | differ if not. | |
c906108c | 1740 | |
ac3eeb49 MS |
1741 | STATICP is nonzero if the T1 argument list came from a static |
1742 | member function. T2 will still include the ``this'' pointer, but | |
1743 | it will be skipped. | |
c906108c SS |
1744 | |
1745 | For non-static member functions, we ignore the first argument, | |
ac3eeb49 MS |
1746 | which is the type of the instance variable. This is because we |
1747 | want to handle calls with objects from derived classes. This is | |
1748 | not entirely correct: we should actually check to make sure that a | |
c906108c SS |
1749 | requested operation is type secure, shouldn't we? FIXME. */ |
1750 | ||
1751 | static int | |
ad2f7632 DJ |
1752 | typecmp (int staticp, int varargs, int nargs, |
1753 | struct field t1[], struct value *t2[]) | |
c906108c SS |
1754 | { |
1755 | int i; | |
1756 | ||
1757 | if (t2 == 0) | |
ac3eeb49 MS |
1758 | internal_error (__FILE__, __LINE__, |
1759 | _("typecmp: no argument list")); | |
ad2f7632 | 1760 | |
ac3eeb49 MS |
1761 | /* Skip ``this'' argument if applicable. T2 will always include |
1762 | THIS. */ | |
4a1970e4 | 1763 | if (staticp) |
ad2f7632 DJ |
1764 | t2 ++; |
1765 | ||
1766 | for (i = 0; | |
1767 | (i < nargs) && TYPE_CODE (t1[i].type) != TYPE_CODE_VOID; | |
1768 | i++) | |
c906108c | 1769 | { |
c5aa993b | 1770 | struct type *tt1, *tt2; |
ad2f7632 | 1771 | |
c5aa993b JM |
1772 | if (!t2[i]) |
1773 | return i + 1; | |
ad2f7632 DJ |
1774 | |
1775 | tt1 = check_typedef (t1[i].type); | |
df407dfe | 1776 | tt2 = check_typedef (value_type (t2[i])); |
ad2f7632 | 1777 | |
c906108c | 1778 | if (TYPE_CODE (tt1) == TYPE_CODE_REF |
c5aa993b | 1779 | /* We should be doing hairy argument matching, as below. */ |
c906108c SS |
1780 | && (TYPE_CODE (check_typedef (TYPE_TARGET_TYPE (tt1))) == TYPE_CODE (tt2))) |
1781 | { | |
1782 | if (TYPE_CODE (tt2) == TYPE_CODE_ARRAY) | |
1783 | t2[i] = value_coerce_array (t2[i]); | |
1784 | else | |
fb933624 | 1785 | t2[i] = value_ref (t2[i]); |
c906108c SS |
1786 | continue; |
1787 | } | |
1788 | ||
802db21b DB |
1789 | /* djb - 20000715 - Until the new type structure is in the |
1790 | place, and we can attempt things like implicit conversions, | |
1791 | we need to do this so you can take something like a map<const | |
1792 | char *>, and properly access map["hello"], because the | |
1793 | argument to [] will be a reference to a pointer to a char, | |
ac3eeb49 MS |
1794 | and the argument will be a pointer to a char. */ |
1795 | while (TYPE_CODE(tt1) == TYPE_CODE_REF | |
1796 | || TYPE_CODE (tt1) == TYPE_CODE_PTR) | |
802db21b DB |
1797 | { |
1798 | tt1 = check_typedef( TYPE_TARGET_TYPE(tt1) ); | |
1799 | } | |
ac3eeb49 MS |
1800 | while (TYPE_CODE(tt2) == TYPE_CODE_ARRAY |
1801 | || TYPE_CODE(tt2) == TYPE_CODE_PTR | |
1802 | || TYPE_CODE(tt2) == TYPE_CODE_REF) | |
c906108c | 1803 | { |
ac3eeb49 | 1804 | tt2 = check_typedef (TYPE_TARGET_TYPE(tt2)); |
c906108c | 1805 | } |
c5aa993b JM |
1806 | if (TYPE_CODE (tt1) == TYPE_CODE (tt2)) |
1807 | continue; | |
ac3eeb49 MS |
1808 | /* Array to pointer is a `trivial conversion' according to the |
1809 | ARM. */ | |
c906108c | 1810 | |
ac3eeb49 MS |
1811 | /* We should be doing much hairier argument matching (see |
1812 | section 13.2 of the ARM), but as a quick kludge, just check | |
1813 | for the same type code. */ | |
df407dfe | 1814 | if (TYPE_CODE (t1[i].type) != TYPE_CODE (value_type (t2[i]))) |
c5aa993b | 1815 | return i + 1; |
c906108c | 1816 | } |
ad2f7632 | 1817 | if (varargs || t2[i] == NULL) |
c5aa993b | 1818 | return 0; |
ad2f7632 | 1819 | return i + 1; |
c906108c SS |
1820 | } |
1821 | ||
ac3eeb49 MS |
1822 | /* Helper function used by value_struct_elt to recurse through |
1823 | baseclasses. Look for a field NAME in ARG1. Adjust the address of | |
1824 | ARG1 by OFFSET bytes, and search in it assuming it has (class) type | |
1825 | TYPE. If found, return value, else return NULL. | |
c906108c | 1826 | |
ac3eeb49 MS |
1827 | If LOOKING_FOR_BASECLASS, then instead of looking for struct |
1828 | fields, look for a baseclass named NAME. */ | |
c906108c | 1829 | |
f23631e4 | 1830 | static struct value * |
714f19d5 | 1831 | search_struct_field (const char *name, struct value *arg1, int offset, |
aa1ee363 | 1832 | struct type *type, int looking_for_baseclass) |
c906108c SS |
1833 | { |
1834 | int i; | |
edf3d5f3 | 1835 | int nbases; |
c906108c SS |
1836 | |
1837 | CHECK_TYPEDEF (type); | |
edf3d5f3 | 1838 | nbases = TYPE_N_BASECLASSES (type); |
c906108c | 1839 | |
c5aa993b | 1840 | if (!looking_for_baseclass) |
c906108c SS |
1841 | for (i = TYPE_NFIELDS (type) - 1; i >= nbases; i--) |
1842 | { | |
1843 | char *t_field_name = TYPE_FIELD_NAME (type, i); | |
1844 | ||
db577aea | 1845 | if (t_field_name && (strcmp_iw (t_field_name, name) == 0)) |
c906108c | 1846 | { |
f23631e4 | 1847 | struct value *v; |
a109c7c1 | 1848 | |
d6a843b5 | 1849 | if (field_is_static (&TYPE_FIELD (type, i))) |
2c2738a0 DC |
1850 | { |
1851 | v = value_static_field (type, i); | |
1852 | if (v == 0) | |
9f18a3b3 | 1853 | error (_("field %s is nonexistent or has been optimized out"), |
2c2738a0 DC |
1854 | name); |
1855 | } | |
c906108c | 1856 | else |
2c2738a0 DC |
1857 | { |
1858 | v = value_primitive_field (arg1, offset, i, type); | |
1859 | if (v == 0) | |
8a3fe4f8 | 1860 | error (_("there is no field named %s"), name); |
2c2738a0 | 1861 | } |
c906108c SS |
1862 | return v; |
1863 | } | |
1864 | ||
1865 | if (t_field_name | |
1866 | && (t_field_name[0] == '\0' | |
1867 | || (TYPE_CODE (type) == TYPE_CODE_UNION | |
db577aea | 1868 | && (strcmp_iw (t_field_name, "else") == 0)))) |
c906108c SS |
1869 | { |
1870 | struct type *field_type = TYPE_FIELD_TYPE (type, i); | |
a109c7c1 | 1871 | |
c906108c SS |
1872 | if (TYPE_CODE (field_type) == TYPE_CODE_UNION |
1873 | || TYPE_CODE (field_type) == TYPE_CODE_STRUCT) | |
1874 | { | |
ac3eeb49 MS |
1875 | /* Look for a match through the fields of an anonymous |
1876 | union, or anonymous struct. C++ provides anonymous | |
1877 | unions. | |
c906108c | 1878 | |
1b831c93 AC |
1879 | In the GNU Chill (now deleted from GDB) |
1880 | implementation of variant record types, each | |
1881 | <alternative field> has an (anonymous) union type, | |
1882 | each member of the union represents a <variant | |
1883 | alternative>. Each <variant alternative> is | |
1884 | represented as a struct, with a member for each | |
1885 | <variant field>. */ | |
c5aa993b | 1886 | |
f23631e4 | 1887 | struct value *v; |
c906108c SS |
1888 | int new_offset = offset; |
1889 | ||
db034ac5 AC |
1890 | /* This is pretty gross. In G++, the offset in an |
1891 | anonymous union is relative to the beginning of the | |
1b831c93 AC |
1892 | enclosing struct. In the GNU Chill (now deleted |
1893 | from GDB) implementation of variant records, the | |
1894 | bitpos is zero in an anonymous union field, so we | |
ac3eeb49 | 1895 | have to add the offset of the union here. */ |
c906108c SS |
1896 | if (TYPE_CODE (field_type) == TYPE_CODE_STRUCT |
1897 | || (TYPE_NFIELDS (field_type) > 0 | |
1898 | && TYPE_FIELD_BITPOS (field_type, 0) == 0)) | |
1899 | new_offset += TYPE_FIELD_BITPOS (type, i) / 8; | |
1900 | ||
ac3eeb49 MS |
1901 | v = search_struct_field (name, arg1, new_offset, |
1902 | field_type, | |
c906108c SS |
1903 | looking_for_baseclass); |
1904 | if (v) | |
1905 | return v; | |
1906 | } | |
1907 | } | |
1908 | } | |
1909 | ||
c5aa993b | 1910 | for (i = 0; i < nbases; i++) |
c906108c | 1911 | { |
f23631e4 | 1912 | struct value *v; |
c906108c | 1913 | struct type *basetype = check_typedef (TYPE_BASECLASS (type, i)); |
ac3eeb49 MS |
1914 | /* If we are looking for baseclasses, this is what we get when |
1915 | we hit them. But it could happen that the base part's member | |
1916 | name is not yet filled in. */ | |
c906108c SS |
1917 | int found_baseclass = (looking_for_baseclass |
1918 | && TYPE_BASECLASS_NAME (type, i) != NULL | |
ac3eeb49 MS |
1919 | && (strcmp_iw (name, |
1920 | TYPE_BASECLASS_NAME (type, | |
1921 | i)) == 0)); | |
c906108c SS |
1922 | |
1923 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
1924 | { | |
1925 | int boffset; | |
3e3d7139 | 1926 | struct value *v2; |
c906108c SS |
1927 | |
1928 | boffset = baseclass_offset (type, i, | |
0fd88904 | 1929 | value_contents (arg1) + offset, |
1a334831 TT |
1930 | value_address (arg1) |
1931 | + value_embedded_offset (arg1) | |
1932 | + offset); | |
c906108c | 1933 | if (boffset == -1) |
8a3fe4f8 | 1934 | error (_("virtual baseclass botch")); |
c906108c | 1935 | |
ac3eeb49 MS |
1936 | /* The virtual base class pointer might have been clobbered |
1937 | by the user program. Make sure that it still points to a | |
1938 | valid memory location. */ | |
c906108c | 1939 | |
1a334831 TT |
1940 | boffset += value_embedded_offset (arg1) + offset; |
1941 | if (boffset < 0 | |
1942 | || boffset >= TYPE_LENGTH (value_enclosing_type (arg1))) | |
c906108c SS |
1943 | { |
1944 | CORE_ADDR base_addr; | |
c5aa993b | 1945 | |
3e3d7139 | 1946 | v2 = allocate_value (basetype); |
42ae5230 | 1947 | base_addr = value_address (arg1) + boffset; |
ac3eeb49 MS |
1948 | if (target_read_memory (base_addr, |
1949 | value_contents_raw (v2), | |
c906108c | 1950 | TYPE_LENGTH (basetype)) != 0) |
8a3fe4f8 | 1951 | error (_("virtual baseclass botch")); |
c906108c | 1952 | VALUE_LVAL (v2) = lval_memory; |
42ae5230 | 1953 | set_value_address (v2, base_addr); |
c906108c SS |
1954 | } |
1955 | else | |
1956 | { | |
1a334831 TT |
1957 | v2 = value_copy (arg1); |
1958 | deprecated_set_value_type (v2, basetype); | |
1959 | set_value_embedded_offset (v2, boffset); | |
c906108c SS |
1960 | } |
1961 | ||
1962 | if (found_baseclass) | |
1963 | return v2; | |
ac3eeb49 MS |
1964 | v = search_struct_field (name, v2, 0, |
1965 | TYPE_BASECLASS (type, i), | |
c906108c SS |
1966 | looking_for_baseclass); |
1967 | } | |
1968 | else if (found_baseclass) | |
1969 | v = value_primitive_field (arg1, offset, i, type); | |
1970 | else | |
1971 | v = search_struct_field (name, arg1, | |
ac3eeb49 MS |
1972 | offset + TYPE_BASECLASS_BITPOS (type, |
1973 | i) / 8, | |
c906108c | 1974 | basetype, looking_for_baseclass); |
c5aa993b JM |
1975 | if (v) |
1976 | return v; | |
c906108c SS |
1977 | } |
1978 | return NULL; | |
1979 | } | |
1980 | ||
ac3eeb49 MS |
1981 | /* Helper function used by value_struct_elt to recurse through |
1982 | baseclasses. Look for a field NAME in ARG1. Adjust the address of | |
1983 | ARG1 by OFFSET bytes, and search in it assuming it has (class) type | |
1984 | TYPE. | |
1985 | ||
1986 | If found, return value, else if name matched and args not return | |
1987 | (value) -1, else return NULL. */ | |
c906108c | 1988 | |
f23631e4 | 1989 | static struct value * |
714f19d5 | 1990 | search_struct_method (const char *name, struct value **arg1p, |
f23631e4 | 1991 | struct value **args, int offset, |
aa1ee363 | 1992 | int *static_memfuncp, struct type *type) |
c906108c SS |
1993 | { |
1994 | int i; | |
f23631e4 | 1995 | struct value *v; |
c906108c SS |
1996 | int name_matched = 0; |
1997 | char dem_opname[64]; | |
1998 | ||
1999 | CHECK_TYPEDEF (type); | |
2000 | for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; i--) | |
2001 | { | |
2002 | char *t_field_name = TYPE_FN_FIELDLIST_NAME (type, i); | |
a109c7c1 | 2003 | |
c906108c | 2004 | /* FIXME! May need to check for ARM demangling here */ |
c5aa993b JM |
2005 | if (strncmp (t_field_name, "__", 2) == 0 || |
2006 | strncmp (t_field_name, "op", 2) == 0 || | |
2007 | strncmp (t_field_name, "type", 4) == 0) | |
c906108c | 2008 | { |
c5aa993b JM |
2009 | if (cplus_demangle_opname (t_field_name, dem_opname, DMGL_ANSI)) |
2010 | t_field_name = dem_opname; | |
2011 | else if (cplus_demangle_opname (t_field_name, dem_opname, 0)) | |
c906108c | 2012 | t_field_name = dem_opname; |
c906108c | 2013 | } |
db577aea | 2014 | if (t_field_name && (strcmp_iw (t_field_name, name) == 0)) |
c906108c SS |
2015 | { |
2016 | int j = TYPE_FN_FIELDLIST_LENGTH (type, i) - 1; | |
2017 | struct fn_field *f = TYPE_FN_FIELDLIST1 (type, i); | |
c906108c | 2018 | |
a109c7c1 | 2019 | name_matched = 1; |
de17c821 | 2020 | check_stub_method_group (type, i); |
c906108c | 2021 | if (j > 0 && args == 0) |
8a3fe4f8 | 2022 | error (_("cannot resolve overloaded method `%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 | { | |
2054 | int base_offset; | |
2055 | ||
2056 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
2057 | { | |
086280be UW |
2058 | struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i)); |
2059 | const gdb_byte *base_valaddr; | |
2060 | ||
2061 | /* The virtual base class pointer might have been | |
2062 | clobbered by the user program. Make sure that it | |
2063 | still points to a valid memory location. */ | |
2064 | ||
2065 | if (offset < 0 || offset >= TYPE_LENGTH (type)) | |
c5aa993b | 2066 | { |
086280be | 2067 | gdb_byte *tmp = alloca (TYPE_LENGTH (baseclass)); |
a109c7c1 | 2068 | |
42ae5230 | 2069 | if (target_read_memory (value_address (*arg1p) + offset, |
086280be UW |
2070 | tmp, TYPE_LENGTH (baseclass)) != 0) |
2071 | error (_("virtual baseclass botch")); | |
2072 | base_valaddr = tmp; | |
c5aa993b JM |
2073 | } |
2074 | else | |
086280be | 2075 | base_valaddr = value_contents (*arg1p) + offset; |
c5aa993b | 2076 | |
086280be | 2077 | base_offset = baseclass_offset (type, i, base_valaddr, |
42ae5230 | 2078 | value_address (*arg1p) + offset); |
086280be UW |
2079 | if (base_offset == -1) |
2080 | error (_("virtual baseclass botch")); | |
c5aa993b | 2081 | } |
c906108c SS |
2082 | else |
2083 | { | |
2084 | base_offset = TYPE_BASECLASS_BITPOS (type, i) / 8; | |
c5aa993b | 2085 | } |
c906108c SS |
2086 | v = search_struct_method (name, arg1p, args, base_offset + offset, |
2087 | static_memfuncp, TYPE_BASECLASS (type, i)); | |
f23631e4 | 2088 | if (v == (struct value *) - 1) |
c906108c SS |
2089 | { |
2090 | name_matched = 1; | |
2091 | } | |
2092 | else if (v) | |
2093 | { | |
ac3eeb49 MS |
2094 | /* FIXME-bothner: Why is this commented out? Why is it here? */ |
2095 | /* *arg1p = arg1_tmp; */ | |
c906108c | 2096 | return v; |
c5aa993b | 2097 | } |
c906108c | 2098 | } |
c5aa993b | 2099 | if (name_matched) |
f23631e4 | 2100 | return (struct value *) - 1; |
c5aa993b JM |
2101 | else |
2102 | return NULL; | |
c906108c SS |
2103 | } |
2104 | ||
2105 | /* Given *ARGP, a value of type (pointer to a)* structure/union, | |
ac3eeb49 MS |
2106 | extract the component named NAME from the ultimate target |
2107 | structure/union and return it as a value with its appropriate type. | |
c906108c SS |
2108 | ERR is used in the error message if *ARGP's type is wrong. |
2109 | ||
2110 | C++: ARGS is a list of argument types to aid in the selection of | |
2111 | an appropriate method. Also, handle derived types. | |
2112 | ||
2113 | STATIC_MEMFUNCP, if non-NULL, points to a caller-supplied location | |
2114 | where the truthvalue of whether the function that was resolved was | |
2115 | a static member function or not is stored. | |
2116 | ||
ac3eeb49 MS |
2117 | ERR is an error message to be printed in case the field is not |
2118 | found. */ | |
c906108c | 2119 | |
f23631e4 AC |
2120 | struct value * |
2121 | value_struct_elt (struct value **argp, struct value **args, | |
714f19d5 | 2122 | const char *name, int *static_memfuncp, const char *err) |
c906108c | 2123 | { |
52f0bd74 | 2124 | struct type *t; |
f23631e4 | 2125 | struct value *v; |
c906108c | 2126 | |
994b9211 | 2127 | *argp = coerce_array (*argp); |
c906108c | 2128 | |
df407dfe | 2129 | t = check_typedef (value_type (*argp)); |
c906108c SS |
2130 | |
2131 | /* Follow pointers until we get to a non-pointer. */ | |
2132 | ||
2133 | while (TYPE_CODE (t) == TYPE_CODE_PTR || TYPE_CODE (t) == TYPE_CODE_REF) | |
2134 | { | |
2135 | *argp = value_ind (*argp); | |
2136 | /* Don't coerce fn pointer to fn and then back again! */ | |
df407dfe | 2137 | if (TYPE_CODE (value_type (*argp)) != TYPE_CODE_FUNC) |
994b9211 | 2138 | *argp = coerce_array (*argp); |
df407dfe | 2139 | t = check_typedef (value_type (*argp)); |
c906108c SS |
2140 | } |
2141 | ||
c5aa993b | 2142 | if (TYPE_CODE (t) != TYPE_CODE_STRUCT |
c906108c | 2143 | && TYPE_CODE (t) != TYPE_CODE_UNION) |
8a3fe4f8 | 2144 | error (_("Attempt to extract a component of a value that is not a %s."), err); |
c906108c SS |
2145 | |
2146 | /* Assume it's not, unless we see that it is. */ | |
2147 | if (static_memfuncp) | |
c5aa993b | 2148 | *static_memfuncp = 0; |
c906108c SS |
2149 | |
2150 | if (!args) | |
2151 | { | |
2152 | /* if there are no arguments ...do this... */ | |
2153 | ||
ac3eeb49 MS |
2154 | /* Try as a field first, because if we succeed, there is less |
2155 | work to be done. */ | |
c906108c SS |
2156 | v = search_struct_field (name, *argp, 0, t, 0); |
2157 | if (v) | |
2158 | return v; | |
2159 | ||
2160 | /* C++: If it was not found as a data field, then try to | |
7b83ea04 | 2161 | return it as a pointer to a method. */ |
ac3eeb49 MS |
2162 | v = search_struct_method (name, argp, args, 0, |
2163 | static_memfuncp, t); | |
c906108c | 2164 | |
f23631e4 | 2165 | if (v == (struct value *) - 1) |
55b39184 | 2166 | error (_("Cannot take address of method %s."), name); |
c906108c SS |
2167 | else if (v == 0) |
2168 | { | |
2169 | if (TYPE_NFN_FIELDS (t)) | |
8a3fe4f8 | 2170 | error (_("There is no member or method named %s."), name); |
c906108c | 2171 | else |
8a3fe4f8 | 2172 | error (_("There is no member named %s."), name); |
c906108c SS |
2173 | } |
2174 | return v; | |
2175 | } | |
2176 | ||
ac3eeb49 MS |
2177 | v = search_struct_method (name, argp, args, 0, |
2178 | static_memfuncp, t); | |
7168a814 | 2179 | |
f23631e4 | 2180 | if (v == (struct value *) - 1) |
c906108c | 2181 | { |
8a3fe4f8 | 2182 | error (_("One of the arguments you tried to pass to %s could not be converted to what the function wants."), name); |
c906108c SS |
2183 | } |
2184 | else if (v == 0) | |
2185 | { | |
ac3eeb49 MS |
2186 | /* See if user tried to invoke data as function. If so, hand it |
2187 | back. If it's not callable (i.e., a pointer to function), | |
7b83ea04 | 2188 | gdb should give an error. */ |
c906108c | 2189 | v = search_struct_field (name, *argp, 0, t, 0); |
fa8de41e TT |
2190 | /* If we found an ordinary field, then it is not a method call. |
2191 | So, treat it as if it were a static member function. */ | |
2192 | if (v && static_memfuncp) | |
2193 | *static_memfuncp = 1; | |
c906108c SS |
2194 | } |
2195 | ||
2196 | if (!v) | |
8a3fe4f8 | 2197 | error (_("Structure has no component named %s."), name); |
c906108c SS |
2198 | return v; |
2199 | } | |
2200 | ||
ac3eeb49 | 2201 | /* Search through the methods of an object (and its bases) to find a |
cfe9eade | 2202 | specified method. Return the pointer to the fn_field list of |
ac3eeb49 MS |
2203 | overloaded instances. |
2204 | ||
2205 | Helper function for value_find_oload_list. | |
2206 | ARGP is a pointer to a pointer to a value (the object). | |
2207 | METHOD is a string containing the method name. | |
2208 | OFFSET is the offset within the value. | |
2209 | TYPE is the assumed type of the object. | |
2210 | NUM_FNS is the number of overloaded instances. | |
2211 | BASETYPE is set to the actual type of the subobject where the | |
2212 | method is found. | |
2213 | BOFFSET is the offset of the base subobject where the method is found. | |
2214 | */ | |
c906108c | 2215 | |
7a292a7a | 2216 | static struct fn_field * |
714f19d5 | 2217 | find_method_list (struct value **argp, const char *method, |
ac3eeb49 | 2218 | int offset, struct type *type, int *num_fns, |
fba45db2 | 2219 | struct type **basetype, int *boffset) |
c906108c SS |
2220 | { |
2221 | int i; | |
c5aa993b | 2222 | struct fn_field *f; |
c906108c SS |
2223 | CHECK_TYPEDEF (type); |
2224 | ||
2225 | *num_fns = 0; | |
2226 | ||
ac3eeb49 | 2227 | /* First check in object itself. */ |
c5aa993b | 2228 | for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; i--) |
c906108c | 2229 | { |
ac3eeb49 | 2230 | /* pai: FIXME What about operators and type conversions? */ |
c5aa993b | 2231 | char *fn_field_name = TYPE_FN_FIELDLIST_NAME (type, i); |
a109c7c1 | 2232 | |
db577aea | 2233 | if (fn_field_name && (strcmp_iw (fn_field_name, method) == 0)) |
c5aa993b | 2234 | { |
4a1970e4 DJ |
2235 | int len = TYPE_FN_FIELDLIST_LENGTH (type, i); |
2236 | struct fn_field *f = TYPE_FN_FIELDLIST1 (type, i); | |
4a1970e4 DJ |
2237 | |
2238 | *num_fns = len; | |
c5aa993b JM |
2239 | *basetype = type; |
2240 | *boffset = offset; | |
4a1970e4 | 2241 | |
de17c821 DJ |
2242 | /* Resolve any stub methods. */ |
2243 | check_stub_method_group (type, i); | |
4a1970e4 DJ |
2244 | |
2245 | return f; | |
c5aa993b JM |
2246 | } |
2247 | } | |
2248 | ||
ac3eeb49 | 2249 | /* Not found in object, check in base subobjects. */ |
c906108c SS |
2250 | for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--) |
2251 | { | |
2252 | int base_offset; | |
a109c7c1 | 2253 | |
c906108c SS |
2254 | if (BASETYPE_VIA_VIRTUAL (type, i)) |
2255 | { | |
086280be UW |
2256 | base_offset = value_offset (*argp) + offset; |
2257 | base_offset = baseclass_offset (type, i, | |
2258 | value_contents (*argp) + base_offset, | |
42ae5230 | 2259 | value_address (*argp) + base_offset); |
086280be UW |
2260 | if (base_offset == -1) |
2261 | error (_("virtual baseclass botch")); | |
c5aa993b | 2262 | } |
ac3eeb49 MS |
2263 | else /* Non-virtual base, simply use bit position from debug |
2264 | info. */ | |
c906108c SS |
2265 | { |
2266 | base_offset = TYPE_BASECLASS_BITPOS (type, i) / 8; | |
c5aa993b | 2267 | } |
c906108c | 2268 | f = find_method_list (argp, method, base_offset + offset, |
ac3eeb49 MS |
2269 | TYPE_BASECLASS (type, i), num_fns, |
2270 | basetype, boffset); | |
c906108c | 2271 | if (f) |
c5aa993b | 2272 | return f; |
c906108c | 2273 | } |
c5aa993b | 2274 | return NULL; |
c906108c SS |
2275 | } |
2276 | ||
2277 | /* Return the list of overloaded methods of a specified name. | |
ac3eeb49 MS |
2278 | |
2279 | ARGP is a pointer to a pointer to a value (the object). | |
2280 | METHOD is the method name. | |
2281 | OFFSET is the offset within the value contents. | |
2282 | NUM_FNS is the number of overloaded instances. | |
2283 | BASETYPE is set to the type of the base subobject that defines the | |
2284 | method. | |
2285 | BOFFSET is the offset of the base subobject which defines the method. | |
2286 | */ | |
c906108c SS |
2287 | |
2288 | struct fn_field * | |
714f19d5 | 2289 | value_find_oload_method_list (struct value **argp, const char *method, |
ac3eeb49 MS |
2290 | int offset, int *num_fns, |
2291 | struct type **basetype, int *boffset) | |
c906108c | 2292 | { |
c5aa993b | 2293 | struct type *t; |
c906108c | 2294 | |
df407dfe | 2295 | t = check_typedef (value_type (*argp)); |
c906108c | 2296 | |
ac3eeb49 | 2297 | /* Code snarfed from value_struct_elt. */ |
c906108c SS |
2298 | while (TYPE_CODE (t) == TYPE_CODE_PTR || TYPE_CODE (t) == TYPE_CODE_REF) |
2299 | { | |
2300 | *argp = value_ind (*argp); | |
2301 | /* Don't coerce fn pointer to fn and then back again! */ | |
df407dfe | 2302 | if (TYPE_CODE (value_type (*argp)) != TYPE_CODE_FUNC) |
994b9211 | 2303 | *argp = coerce_array (*argp); |
df407dfe | 2304 | t = check_typedef (value_type (*argp)); |
c906108c | 2305 | } |
c5aa993b | 2306 | |
c5aa993b JM |
2307 | if (TYPE_CODE (t) != TYPE_CODE_STRUCT |
2308 | && TYPE_CODE (t) != TYPE_CODE_UNION) | |
8a3fe4f8 | 2309 | error (_("Attempt to extract a component of a value that is not a struct or union")); |
c5aa993b | 2310 | |
ac3eeb49 MS |
2311 | return find_method_list (argp, method, 0, t, num_fns, |
2312 | basetype, boffset); | |
c906108c SS |
2313 | } |
2314 | ||
2315 | /* Given an array of argument types (ARGTYPES) (which includes an | |
2316 | entry for "this" in the case of C++ methods), the number of | |
2317 | arguments NARGS, the NAME of a function whether it's a method or | |
2318 | not (METHOD), and the degree of laxness (LAX) in conforming to | |
2319 | overload resolution rules in ANSI C++, find the best function that | |
2320 | matches on the argument types according to the overload resolution | |
2321 | rules. | |
2322 | ||
4c3376c8 SW |
2323 | METHOD can be one of three values: |
2324 | NON_METHOD for non-member functions. | |
2325 | METHOD: for member functions. | |
2326 | BOTH: used for overload resolution of operators where the | |
2327 | candidates are expected to be either member or non member | |
2328 | functions. In this case the first argument ARGTYPES | |
2329 | (representing 'this') is expected to be a reference to the | |
2330 | target object, and will be dereferenced when attempting the | |
2331 | non-member search. | |
2332 | ||
c906108c SS |
2333 | In the case of class methods, the parameter OBJ is an object value |
2334 | in which to search for overloaded methods. | |
2335 | ||
2336 | In the case of non-method functions, the parameter FSYM is a symbol | |
2337 | corresponding to one of the overloaded functions. | |
2338 | ||
2339 | Return value is an integer: 0 -> good match, 10 -> debugger applied | |
2340 | non-standard coercions, 100 -> incompatible. | |
2341 | ||
2342 | If a method is being searched for, VALP will hold the value. | |
ac3eeb49 MS |
2343 | If a non-method is being searched for, SYMP will hold the symbol |
2344 | for it. | |
c906108c SS |
2345 | |
2346 | If a method is being searched for, and it is a static method, | |
2347 | then STATICP will point to a non-zero value. | |
2348 | ||
7322dca9 SW |
2349 | If NO_ADL argument dependent lookup is disabled. This is used to prevent |
2350 | ADL overload candidates when performing overload resolution for a fully | |
2351 | qualified name. | |
2352 | ||
c906108c SS |
2353 | Note: This function does *not* check the value of |
2354 | overload_resolution. Caller must check it to see whether overload | |
2355 | resolution is permitted. | |
ac3eeb49 | 2356 | */ |
c906108c SS |
2357 | |
2358 | int | |
ac3eeb49 | 2359 | find_overload_match (struct type **arg_types, int nargs, |
4c3376c8 SW |
2360 | const char *name, enum oload_search_type method, |
2361 | int lax, struct value **objp, struct symbol *fsym, | |
ac3eeb49 | 2362 | struct value **valp, struct symbol **symp, |
7322dca9 | 2363 | int *staticp, const int no_adl) |
c906108c | 2364 | { |
7f8c9282 | 2365 | struct value *obj = (objp ? *objp : NULL); |
ac3eeb49 | 2366 | /* Index of best overloaded function. */ |
4c3376c8 SW |
2367 | int func_oload_champ = -1; |
2368 | int method_oload_champ = -1; | |
2369 | ||
ac3eeb49 | 2370 | /* The measure for the current best match. */ |
4c3376c8 SW |
2371 | struct badness_vector *method_badness = NULL; |
2372 | struct badness_vector *func_badness = NULL; | |
2373 | ||
f23631e4 | 2374 | struct value *temp = obj; |
ac3eeb49 MS |
2375 | /* For methods, the list of overloaded methods. */ |
2376 | struct fn_field *fns_ptr = NULL; | |
2377 | /* For non-methods, the list of overloaded function symbols. */ | |
2378 | struct symbol **oload_syms = NULL; | |
2379 | /* Number of overloaded instances being considered. */ | |
2380 | int num_fns = 0; | |
c5aa993b | 2381 | struct type *basetype = NULL; |
c906108c | 2382 | int boffset; |
7322dca9 SW |
2383 | |
2384 | struct cleanup *all_cleanups = make_cleanup (null_cleanup, NULL); | |
c906108c | 2385 | |
8d577d32 | 2386 | const char *obj_type_name = NULL; |
7322dca9 | 2387 | const char *func_name = NULL; |
8d577d32 | 2388 | enum oload_classification match_quality; |
4c3376c8 SW |
2389 | enum oload_classification method_match_quality = INCOMPATIBLE; |
2390 | enum oload_classification func_match_quality = INCOMPATIBLE; | |
c906108c | 2391 | |
ac3eeb49 | 2392 | /* Get the list of overloaded methods or functions. */ |
4c3376c8 | 2393 | if (method == METHOD || method == BOTH) |
c906108c | 2394 | { |
a2ca50ae | 2395 | gdb_assert (obj); |
94af9270 KS |
2396 | |
2397 | /* OBJ may be a pointer value rather than the object itself. */ | |
2398 | obj = coerce_ref (obj); | |
2399 | while (TYPE_CODE (check_typedef (value_type (obj))) == TYPE_CODE_PTR) | |
2400 | obj = coerce_ref (value_ind (obj)); | |
df407dfe | 2401 | obj_type_name = TYPE_NAME (value_type (obj)); |
94af9270 KS |
2402 | |
2403 | /* First check whether this is a data member, e.g. a pointer to | |
2404 | a function. */ | |
2405 | if (TYPE_CODE (check_typedef (value_type (obj))) == TYPE_CODE_STRUCT) | |
2406 | { | |
2407 | *valp = search_struct_field (name, obj, 0, | |
2408 | check_typedef (value_type (obj)), 0); | |
2409 | if (*valp) | |
2410 | { | |
2411 | *staticp = 1; | |
2412 | return 0; | |
2413 | } | |
2414 | } | |
c906108c | 2415 | |
4c3376c8 | 2416 | /* Retrieve the list of methods with the name NAME. */ |
ac3eeb49 MS |
2417 | fns_ptr = value_find_oload_method_list (&temp, name, |
2418 | 0, &num_fns, | |
c5aa993b | 2419 | &basetype, &boffset); |
4c3376c8 SW |
2420 | /* If this is a method only search, and no methods were found |
2421 | the search has faild. */ | |
2422 | if (method == METHOD && (!fns_ptr || !num_fns)) | |
8a3fe4f8 | 2423 | error (_("Couldn't find method %s%s%s"), |
c5aa993b JM |
2424 | obj_type_name, |
2425 | (obj_type_name && *obj_type_name) ? "::" : "", | |
2426 | name); | |
4a1970e4 | 2427 | /* If we are dealing with stub method types, they should have |
ac3eeb49 MS |
2428 | been resolved by find_method_list via |
2429 | value_find_oload_method_list above. */ | |
4c3376c8 SW |
2430 | if (fns_ptr) |
2431 | { | |
2432 | gdb_assert (TYPE_DOMAIN_TYPE (fns_ptr[0].type) != NULL); | |
2433 | method_oload_champ = find_oload_champ (arg_types, nargs, method, | |
2434 | num_fns, fns_ptr, | |
2435 | oload_syms, &method_badness); | |
2436 | ||
2437 | method_match_quality = | |
2438 | classify_oload_match (method_badness, nargs, | |
2439 | oload_method_static (method, fns_ptr, | |
2440 | method_oload_champ)); | |
2441 | ||
2442 | make_cleanup (xfree, method_badness); | |
2443 | } | |
2444 | ||
c906108c | 2445 | } |
4c3376c8 SW |
2446 | |
2447 | if (method == NON_METHOD || method == BOTH) | |
c906108c | 2448 | { |
7322dca9 | 2449 | const char *qualified_name = NULL; |
c906108c | 2450 | |
4c3376c8 SW |
2451 | /* If the the overload match is being search for both |
2452 | as a method and non member function, the first argument | |
2453 | must now be dereferenced. */ | |
2454 | if (method == BOTH) | |
2455 | arg_types[0] = TYPE_TARGET_TYPE (arg_types[0]); | |
2456 | ||
7322dca9 SW |
2457 | if (fsym) |
2458 | { | |
2459 | qualified_name = SYMBOL_NATURAL_NAME (fsym); | |
2460 | ||
2461 | /* If we have a function with a C++ name, try to extract just | |
2462 | the function part. Do not try this for non-functions (e.g. | |
2463 | function pointers). */ | |
2464 | if (qualified_name | |
2465 | && TYPE_CODE (check_typedef (SYMBOL_TYPE (fsym))) == TYPE_CODE_FUNC) | |
2466 | { | |
2467 | char *temp; | |
2468 | ||
2469 | temp = cp_func_name (qualified_name); | |
2470 | ||
2471 | /* If cp_func_name did not remove anything, the name of the | |
2472 | symbol did not include scope or argument types - it was | |
2473 | probably a C-style function. */ | |
2474 | if (temp) | |
2475 | { | |
2476 | make_cleanup (xfree, temp); | |
2477 | if (strcmp (temp, qualified_name) == 0) | |
2478 | func_name = NULL; | |
2479 | else | |
2480 | func_name = temp; | |
2481 | } | |
2482 | } | |
2483 | } | |
2484 | else | |
94af9270 | 2485 | { |
7322dca9 SW |
2486 | func_name = name; |
2487 | qualified_name = name; | |
94af9270 | 2488 | } |
d9639e13 | 2489 | |
94af9270 KS |
2490 | /* If there was no C++ name, this must be a C-style function or |
2491 | not a function at all. Just return the same symbol. Do the | |
2492 | same if cp_func_name fails for some reason. */ | |
8d577d32 | 2493 | if (func_name == NULL) |
7b83ea04 | 2494 | { |
917317f4 | 2495 | *symp = fsym; |
7b83ea04 AC |
2496 | return 0; |
2497 | } | |
917317f4 | 2498 | |
4c3376c8 SW |
2499 | func_oload_champ = find_oload_champ_namespace (arg_types, nargs, |
2500 | func_name, | |
2501 | qualified_name, | |
2502 | &oload_syms, | |
2503 | &func_badness, | |
2504 | no_adl); | |
8d577d32 | 2505 | |
4c3376c8 SW |
2506 | if (func_oload_champ >= 0) |
2507 | func_match_quality = classify_oload_match (func_badness, nargs, 0); | |
2508 | ||
2509 | make_cleanup (xfree, oload_syms); | |
2510 | make_cleanup (xfree, func_badness); | |
8d577d32 DC |
2511 | } |
2512 | ||
7322dca9 | 2513 | /* Did we find a match ? */ |
4c3376c8 | 2514 | if (method_oload_champ == -1 && func_oload_champ == -1) |
4c680d1d | 2515 | error (_("No symbol \"%s\" in current context."), name); |
8d577d32 | 2516 | |
4c3376c8 SW |
2517 | /* If we have found both a method match and a function |
2518 | match, find out which one is better, and calculate match | |
2519 | quality. */ | |
2520 | if (method_oload_champ >= 0 && func_oload_champ >= 0) | |
2521 | { | |
2522 | switch (compare_badness (func_badness, method_badness)) | |
2523 | { | |
2524 | case 0: /* Top two contenders are equally good. */ | |
2525 | /* FIXME: GDB does not support the general ambiguous | |
2526 | case. All candidates should be collected and presented | |
2527 | the the user. */ | |
2528 | error (_("Ambiguous overload resolution")); | |
2529 | break; | |
2530 | case 1: /* Incomparable top contenders. */ | |
2531 | /* This is an error incompatible candidates | |
2532 | should not have been proposed. */ | |
2533 | error (_("Internal error: incompatible overload candidates proposed")); | |
2534 | break; | |
2535 | case 2: /* Function champion. */ | |
2536 | method_oload_champ = -1; | |
2537 | match_quality = func_match_quality; | |
2538 | break; | |
2539 | case 3: /* Method champion. */ | |
2540 | func_oload_champ = -1; | |
2541 | match_quality = method_match_quality; | |
2542 | break; | |
2543 | default: | |
2544 | error (_("Internal error: unexpected overload comparison result")); | |
2545 | break; | |
2546 | } | |
2547 | } | |
2548 | else | |
2549 | { | |
2550 | /* We have either a method match or a function match. */ | |
2551 | if (method_oload_champ >= 0) | |
2552 | match_quality = method_match_quality; | |
2553 | else | |
2554 | match_quality = func_match_quality; | |
2555 | } | |
8d577d32 DC |
2556 | |
2557 | if (match_quality == INCOMPATIBLE) | |
2558 | { | |
4c3376c8 | 2559 | if (method == METHOD) |
8a3fe4f8 | 2560 | error (_("Cannot resolve method %s%s%s to any overloaded instance"), |
8d577d32 DC |
2561 | obj_type_name, |
2562 | (obj_type_name && *obj_type_name) ? "::" : "", | |
2563 | name); | |
2564 | else | |
8a3fe4f8 | 2565 | error (_("Cannot resolve function %s to any overloaded instance"), |
8d577d32 DC |
2566 | func_name); |
2567 | } | |
2568 | else if (match_quality == NON_STANDARD) | |
2569 | { | |
4c3376c8 | 2570 | if (method == METHOD) |
8a3fe4f8 | 2571 | warning (_("Using non-standard conversion to match method %s%s%s to supplied arguments"), |
8d577d32 DC |
2572 | obj_type_name, |
2573 | (obj_type_name && *obj_type_name) ? "::" : "", | |
2574 | name); | |
2575 | else | |
8a3fe4f8 | 2576 | warning (_("Using non-standard conversion to match function %s to supplied arguments"), |
8d577d32 DC |
2577 | func_name); |
2578 | } | |
2579 | ||
4c3376c8 SW |
2580 | if (staticp != NULL) |
2581 | *staticp = oload_method_static (method, fns_ptr, method_oload_champ); | |
2582 | ||
2583 | if (method_oload_champ >= 0) | |
8d577d32 | 2584 | { |
4c3376c8 SW |
2585 | if (TYPE_FN_FIELD_VIRTUAL_P (fns_ptr, method_oload_champ)) |
2586 | *valp = value_virtual_fn_field (&temp, fns_ptr, method_oload_champ, | |
ac3eeb49 | 2587 | basetype, boffset); |
8d577d32 | 2588 | else |
4c3376c8 | 2589 | *valp = value_fn_field (&temp, fns_ptr, method_oload_champ, |
ac3eeb49 | 2590 | basetype, boffset); |
8d577d32 DC |
2591 | } |
2592 | else | |
4c3376c8 | 2593 | *symp = oload_syms[func_oload_champ]; |
8d577d32 DC |
2594 | |
2595 | if (objp) | |
2596 | { | |
a4295225 TT |
2597 | struct type *temp_type = check_typedef (value_type (temp)); |
2598 | struct type *obj_type = check_typedef (value_type (*objp)); | |
a109c7c1 | 2599 | |
a4295225 TT |
2600 | if (TYPE_CODE (temp_type) != TYPE_CODE_PTR |
2601 | && (TYPE_CODE (obj_type) == TYPE_CODE_PTR | |
2602 | || TYPE_CODE (obj_type) == TYPE_CODE_REF)) | |
8d577d32 DC |
2603 | { |
2604 | temp = value_addr (temp); | |
2605 | } | |
2606 | *objp = temp; | |
2607 | } | |
7322dca9 SW |
2608 | |
2609 | do_cleanups (all_cleanups); | |
8d577d32 DC |
2610 | |
2611 | switch (match_quality) | |
2612 | { | |
2613 | case INCOMPATIBLE: | |
2614 | return 100; | |
2615 | case NON_STANDARD: | |
2616 | return 10; | |
2617 | default: /* STANDARD */ | |
2618 | return 0; | |
2619 | } | |
2620 | } | |
2621 | ||
2622 | /* Find the best overload match, searching for FUNC_NAME in namespaces | |
2623 | contained in QUALIFIED_NAME until it either finds a good match or | |
2624 | runs out of namespaces. It stores the overloaded functions in | |
2625 | *OLOAD_SYMS, and the badness vector in *OLOAD_CHAMP_BV. The | |
2626 | calling function is responsible for freeing *OLOAD_SYMS and | |
7322dca9 SW |
2627 | *OLOAD_CHAMP_BV. If NO_ADL, argument dependent lookup is not |
2628 | performned. */ | |
8d577d32 DC |
2629 | |
2630 | static int | |
2631 | find_oload_champ_namespace (struct type **arg_types, int nargs, | |
2632 | const char *func_name, | |
2633 | const char *qualified_name, | |
2634 | struct symbol ***oload_syms, | |
7322dca9 SW |
2635 | struct badness_vector **oload_champ_bv, |
2636 | const int no_adl) | |
8d577d32 DC |
2637 | { |
2638 | int oload_champ; | |
2639 | ||
2640 | find_oload_champ_namespace_loop (arg_types, nargs, | |
2641 | func_name, | |
2642 | qualified_name, 0, | |
2643 | oload_syms, oload_champ_bv, | |
7322dca9 SW |
2644 | &oload_champ, |
2645 | no_adl); | |
8d577d32 DC |
2646 | |
2647 | return oload_champ; | |
2648 | } | |
2649 | ||
2650 | /* Helper function for find_oload_champ_namespace; NAMESPACE_LEN is | |
2651 | how deep we've looked for namespaces, and the champ is stored in | |
2652 | OLOAD_CHAMP. The return value is 1 if the champ is a good one, 0 | |
7322dca9 SW |
2653 | if it isn't. Other arguments are the same as in |
2654 | find_oload_champ_namespace | |
8d577d32 DC |
2655 | |
2656 | It is the caller's responsibility to free *OLOAD_SYMS and | |
2657 | *OLOAD_CHAMP_BV. */ | |
2658 | ||
2659 | static int | |
2660 | find_oload_champ_namespace_loop (struct type **arg_types, int nargs, | |
2661 | const char *func_name, | |
2662 | const char *qualified_name, | |
2663 | int namespace_len, | |
2664 | struct symbol ***oload_syms, | |
2665 | struct badness_vector **oload_champ_bv, | |
7322dca9 SW |
2666 | int *oload_champ, |
2667 | const int no_adl) | |
8d577d32 DC |
2668 | { |
2669 | int next_namespace_len = namespace_len; | |
2670 | int searched_deeper = 0; | |
2671 | int num_fns = 0; | |
2672 | struct cleanup *old_cleanups; | |
2673 | int new_oload_champ; | |
2674 | struct symbol **new_oload_syms; | |
2675 | struct badness_vector *new_oload_champ_bv; | |
2676 | char *new_namespace; | |
2677 | ||
2678 | if (next_namespace_len != 0) | |
2679 | { | |
2680 | gdb_assert (qualified_name[next_namespace_len] == ':'); | |
2681 | next_namespace_len += 2; | |
c906108c | 2682 | } |
ac3eeb49 MS |
2683 | next_namespace_len += |
2684 | cp_find_first_component (qualified_name + next_namespace_len); | |
8d577d32 DC |
2685 | |
2686 | /* Initialize these to values that can safely be xfree'd. */ | |
2687 | *oload_syms = NULL; | |
2688 | *oload_champ_bv = NULL; | |
c5aa993b | 2689 | |
ac3eeb49 MS |
2690 | /* First, see if we have a deeper namespace we can search in. |
2691 | If we get a good match there, use it. */ | |
8d577d32 DC |
2692 | |
2693 | if (qualified_name[next_namespace_len] == ':') | |
2694 | { | |
2695 | searched_deeper = 1; | |
2696 | ||
2697 | if (find_oload_champ_namespace_loop (arg_types, nargs, | |
2698 | func_name, qualified_name, | |
2699 | next_namespace_len, | |
2700 | oload_syms, oload_champ_bv, | |
7322dca9 | 2701 | oload_champ, no_adl)) |
8d577d32 DC |
2702 | { |
2703 | return 1; | |
2704 | } | |
2705 | }; | |
2706 | ||
2707 | /* If we reach here, either we're in the deepest namespace or we | |
2708 | didn't find a good match in a deeper namespace. But, in the | |
2709 | latter case, we still have a bad match in a deeper namespace; | |
2710 | note that we might not find any match at all in the current | |
2711 | namespace. (There's always a match in the deepest namespace, | |
2712 | because this overload mechanism only gets called if there's a | |
2713 | function symbol to start off with.) */ | |
2714 | ||
2715 | old_cleanups = make_cleanup (xfree, *oload_syms); | |
2716 | old_cleanups = make_cleanup (xfree, *oload_champ_bv); | |
2717 | new_namespace = alloca (namespace_len + 1); | |
2718 | strncpy (new_namespace, qualified_name, namespace_len); | |
2719 | new_namespace[namespace_len] = '\0'; | |
2720 | new_oload_syms = make_symbol_overload_list (func_name, | |
2721 | new_namespace); | |
7322dca9 SW |
2722 | |
2723 | /* If we have reached the deepest level perform argument | |
2724 | determined lookup. */ | |
2725 | if (!searched_deeper && !no_adl) | |
2726 | make_symbol_overload_list_adl (arg_types, nargs, func_name); | |
2727 | ||
8d577d32 DC |
2728 | while (new_oload_syms[num_fns]) |
2729 | ++num_fns; | |
2730 | ||
2731 | new_oload_champ = find_oload_champ (arg_types, nargs, 0, num_fns, | |
2732 | NULL, new_oload_syms, | |
2733 | &new_oload_champ_bv); | |
2734 | ||
2735 | /* Case 1: We found a good match. Free earlier matches (if any), | |
2736 | and return it. Case 2: We didn't find a good match, but we're | |
2737 | not the deepest function. Then go with the bad match that the | |
2738 | deeper function found. Case 3: We found a bad match, and we're | |
2739 | the deepest function. Then return what we found, even though | |
2740 | it's a bad match. */ | |
2741 | ||
2742 | if (new_oload_champ != -1 | |
2743 | && classify_oload_match (new_oload_champ_bv, nargs, 0) == STANDARD) | |
2744 | { | |
2745 | *oload_syms = new_oload_syms; | |
2746 | *oload_champ = new_oload_champ; | |
2747 | *oload_champ_bv = new_oload_champ_bv; | |
2748 | do_cleanups (old_cleanups); | |
2749 | return 1; | |
2750 | } | |
2751 | else if (searched_deeper) | |
2752 | { | |
2753 | xfree (new_oload_syms); | |
2754 | xfree (new_oload_champ_bv); | |
2755 | discard_cleanups (old_cleanups); | |
2756 | return 0; | |
2757 | } | |
2758 | else | |
2759 | { | |
8d577d32 DC |
2760 | *oload_syms = new_oload_syms; |
2761 | *oload_champ = new_oload_champ; | |
2762 | *oload_champ_bv = new_oload_champ_bv; | |
2763 | discard_cleanups (old_cleanups); | |
2764 | return 0; | |
2765 | } | |
2766 | } | |
2767 | ||
2768 | /* Look for a function to take NARGS args of types ARG_TYPES. Find | |
2769 | the best match from among the overloaded methods or functions | |
2770 | (depending on METHOD) given by FNS_PTR or OLOAD_SYMS, respectively. | |
2771 | The number of methods/functions in the list is given by NUM_FNS. | |
2772 | Return the index of the best match; store an indication of the | |
2773 | quality of the match in OLOAD_CHAMP_BV. | |
2774 | ||
2775 | It is the caller's responsibility to free *OLOAD_CHAMP_BV. */ | |
2776 | ||
2777 | static int | |
2778 | find_oload_champ (struct type **arg_types, int nargs, int method, | |
2779 | int num_fns, struct fn_field *fns_ptr, | |
2780 | struct symbol **oload_syms, | |
2781 | struct badness_vector **oload_champ_bv) | |
2782 | { | |
2783 | int ix; | |
ac3eeb49 MS |
2784 | /* A measure of how good an overloaded instance is. */ |
2785 | struct badness_vector *bv; | |
2786 | /* Index of best overloaded function. */ | |
2787 | int oload_champ = -1; | |
2788 | /* Current ambiguity state for overload resolution. */ | |
2789 | int oload_ambiguous = 0; | |
2790 | /* 0 => no ambiguity, 1 => two good funcs, 2 => incomparable funcs. */ | |
8d577d32 DC |
2791 | |
2792 | *oload_champ_bv = NULL; | |
c906108c | 2793 | |
ac3eeb49 | 2794 | /* Consider each candidate in turn. */ |
c906108c SS |
2795 | for (ix = 0; ix < num_fns; ix++) |
2796 | { | |
8d577d32 DC |
2797 | int jj; |
2798 | int static_offset = oload_method_static (method, fns_ptr, ix); | |
2799 | int nparms; | |
2800 | struct type **parm_types; | |
2801 | ||
db577aea AC |
2802 | if (method) |
2803 | { | |
ad2f7632 | 2804 | nparms = TYPE_NFIELDS (TYPE_FN_FIELD_TYPE (fns_ptr, ix)); |
db577aea AC |
2805 | } |
2806 | else | |
2807 | { | |
ac3eeb49 MS |
2808 | /* If it's not a method, this is the proper place. */ |
2809 | nparms = TYPE_NFIELDS (SYMBOL_TYPE (oload_syms[ix])); | |
db577aea | 2810 | } |
c906108c | 2811 | |
ac3eeb49 MS |
2812 | /* Prepare array of parameter types. */ |
2813 | parm_types = (struct type **) | |
2814 | xmalloc (nparms * (sizeof (struct type *))); | |
c906108c | 2815 | for (jj = 0; jj < nparms; jj++) |
db577aea | 2816 | parm_types[jj] = (method |
ad2f7632 | 2817 | ? (TYPE_FN_FIELD_ARGS (fns_ptr, ix)[jj].type) |
ac3eeb49 MS |
2818 | : TYPE_FIELD_TYPE (SYMBOL_TYPE (oload_syms[ix]), |
2819 | jj)); | |
c906108c | 2820 | |
ac3eeb49 MS |
2821 | /* Compare parameter types to supplied argument types. Skip |
2822 | THIS for static methods. */ | |
2823 | bv = rank_function (parm_types, nparms, | |
2824 | arg_types + static_offset, | |
4a1970e4 | 2825 | nargs - static_offset); |
c5aa993b | 2826 | |
8d577d32 | 2827 | if (!*oload_champ_bv) |
c5aa993b | 2828 | { |
8d577d32 | 2829 | *oload_champ_bv = bv; |
c5aa993b | 2830 | oload_champ = 0; |
c5aa993b | 2831 | } |
ac3eeb49 MS |
2832 | else /* See whether current candidate is better or worse than |
2833 | previous best. */ | |
8d577d32 | 2834 | switch (compare_badness (bv, *oload_champ_bv)) |
c5aa993b | 2835 | { |
ac3eeb49 MS |
2836 | case 0: /* Top two contenders are equally good. */ |
2837 | oload_ambiguous = 1; | |
c5aa993b | 2838 | break; |
ac3eeb49 MS |
2839 | case 1: /* Incomparable top contenders. */ |
2840 | oload_ambiguous = 2; | |
c5aa993b | 2841 | break; |
ac3eeb49 MS |
2842 | case 2: /* New champion, record details. */ |
2843 | *oload_champ_bv = bv; | |
c5aa993b JM |
2844 | oload_ambiguous = 0; |
2845 | oload_champ = ix; | |
c5aa993b JM |
2846 | break; |
2847 | case 3: | |
2848 | default: | |
2849 | break; | |
2850 | } | |
b8c9b27d | 2851 | xfree (parm_types); |
6b1ba9a0 ND |
2852 | if (overload_debug) |
2853 | { | |
2854 | if (method) | |
ac3eeb49 MS |
2855 | fprintf_filtered (gdb_stderr, |
2856 | "Overloaded method instance %s, # of parms %d\n", | |
2857 | fns_ptr[ix].physname, nparms); | |
6b1ba9a0 | 2858 | else |
ac3eeb49 MS |
2859 | fprintf_filtered (gdb_stderr, |
2860 | "Overloaded function instance %s # of parms %d\n", | |
2861 | SYMBOL_DEMANGLED_NAME (oload_syms[ix]), | |
2862 | nparms); | |
4a1970e4 | 2863 | for (jj = 0; jj < nargs - static_offset; jj++) |
ac3eeb49 MS |
2864 | fprintf_filtered (gdb_stderr, |
2865 | "...Badness @ %d : %d\n", | |
2866 | jj, bv->rank[jj]); | |
2867 | fprintf_filtered (gdb_stderr, | |
2868 | "Overload resolution champion is %d, ambiguous? %d\n", | |
2869 | oload_champ, oload_ambiguous); | |
6b1ba9a0 | 2870 | } |
c906108c SS |
2871 | } |
2872 | ||
8d577d32 DC |
2873 | return oload_champ; |
2874 | } | |
6b1ba9a0 | 2875 | |
8d577d32 DC |
2876 | /* Return 1 if we're looking at a static method, 0 if we're looking at |
2877 | a non-static method or a function that isn't a method. */ | |
c906108c | 2878 | |
8d577d32 DC |
2879 | static int |
2880 | oload_method_static (int method, struct fn_field *fns_ptr, int index) | |
2881 | { | |
4c3376c8 SW |
2882 | if (method && fns_ptr && index >= 0 |
2883 | && TYPE_FN_FIELD_STATIC_P (fns_ptr, index)) | |
8d577d32 | 2884 | return 1; |
c906108c | 2885 | else |
8d577d32 DC |
2886 | return 0; |
2887 | } | |
c906108c | 2888 | |
8d577d32 DC |
2889 | /* Check how good an overload match OLOAD_CHAMP_BV represents. */ |
2890 | ||
2891 | static enum oload_classification | |
2892 | classify_oload_match (struct badness_vector *oload_champ_bv, | |
2893 | int nargs, | |
2894 | int static_offset) | |
2895 | { | |
2896 | int ix; | |
2897 | ||
2898 | for (ix = 1; ix <= nargs - static_offset; ix++) | |
7f8c9282 | 2899 | { |
8d577d32 | 2900 | if (oload_champ_bv->rank[ix] >= 100) |
ac3eeb49 | 2901 | return INCOMPATIBLE; /* Truly mismatched types. */ |
8d577d32 | 2902 | else if (oload_champ_bv->rank[ix] >= 10) |
ac3eeb49 MS |
2903 | return NON_STANDARD; /* Non-standard type conversions |
2904 | needed. */ | |
7f8c9282 | 2905 | } |
02f0d45d | 2906 | |
8d577d32 | 2907 | return STANDARD; /* Only standard conversions needed. */ |
c906108c SS |
2908 | } |
2909 | ||
ac3eeb49 MS |
2910 | /* C++: return 1 is NAME is a legitimate name for the destructor of |
2911 | type TYPE. If TYPE does not have a destructor, or if NAME is | |
2912 | inappropriate for TYPE, an error is signaled. */ | |
c906108c | 2913 | int |
fba45db2 | 2914 | destructor_name_p (const char *name, const struct type *type) |
c906108c | 2915 | { |
c906108c SS |
2916 | if (name[0] == '~') |
2917 | { | |
2918 | char *dname = type_name_no_tag (type); | |
2919 | char *cp = strchr (dname, '<'); | |
2920 | unsigned int len; | |
2921 | ||
2922 | /* Do not compare the template part for template classes. */ | |
2923 | if (cp == NULL) | |
2924 | len = strlen (dname); | |
2925 | else | |
2926 | len = cp - dname; | |
bf896cb0 | 2927 | if (strlen (name + 1) != len || strncmp (dname, name + 1, len) != 0) |
8a3fe4f8 | 2928 | error (_("name of destructor must equal name of class")); |
c906108c SS |
2929 | else |
2930 | return 1; | |
2931 | } | |
2932 | return 0; | |
2933 | } | |
2934 | ||
2b2d9e11 | 2935 | /* Given TYPE, a structure/union, |
ac3eeb49 MS |
2936 | return 1 if the component named NAME from the ultimate target |
2937 | structure/union is defined, otherwise, return 0. */ | |
c906108c | 2938 | |
2b2d9e11 VP |
2939 | int |
2940 | check_field (struct type *type, const char *name) | |
c906108c | 2941 | { |
52f0bd74 | 2942 | int i; |
c906108c | 2943 | |
edf3d5f3 TT |
2944 | /* The type may be a stub. */ |
2945 | CHECK_TYPEDEF (type); | |
2946 | ||
c906108c SS |
2947 | for (i = TYPE_NFIELDS (type) - 1; i >= TYPE_N_BASECLASSES (type); i--) |
2948 | { | |
2949 | char *t_field_name = TYPE_FIELD_NAME (type, i); | |
a109c7c1 | 2950 | |
db577aea | 2951 | if (t_field_name && (strcmp_iw (t_field_name, name) == 0)) |
c906108c SS |
2952 | return 1; |
2953 | } | |
2954 | ||
ac3eeb49 MS |
2955 | /* C++: If it was not found as a data field, then try to return it |
2956 | as a pointer to a method. */ | |
c906108c | 2957 | |
c906108c SS |
2958 | for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; --i) |
2959 | { | |
db577aea | 2960 | if (strcmp_iw (TYPE_FN_FIELDLIST_NAME (type, i), name) == 0) |
c906108c SS |
2961 | return 1; |
2962 | } | |
2963 | ||
2964 | for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--) | |
2b2d9e11 | 2965 | if (check_field (TYPE_BASECLASS (type, i), name)) |
c906108c | 2966 | return 1; |
c5aa993b | 2967 | |
c906108c SS |
2968 | return 0; |
2969 | } | |
2970 | ||
79c2c32d | 2971 | /* C++: Given an aggregate type CURTYPE, and a member name NAME, |
0d5de010 DJ |
2972 | return the appropriate member (or the address of the member, if |
2973 | WANT_ADDRESS). This function is used to resolve user expressions | |
2974 | of the form "DOMAIN::NAME". For more details on what happens, see | |
2975 | the comment before value_struct_elt_for_reference. */ | |
79c2c32d DC |
2976 | |
2977 | struct value * | |
072bba3b KS |
2978 | value_aggregate_elt (struct type *curtype, char *name, |
2979 | struct type *expect_type, int want_address, | |
79c2c32d DC |
2980 | enum noside noside) |
2981 | { | |
2982 | switch (TYPE_CODE (curtype)) | |
2983 | { | |
2984 | case TYPE_CODE_STRUCT: | |
2985 | case TYPE_CODE_UNION: | |
ac3eeb49 | 2986 | return value_struct_elt_for_reference (curtype, 0, curtype, |
072bba3b | 2987 | name, expect_type, |
0d5de010 | 2988 | want_address, noside); |
79c2c32d | 2989 | case TYPE_CODE_NAMESPACE: |
ac3eeb49 MS |
2990 | return value_namespace_elt (curtype, name, |
2991 | want_address, noside); | |
79c2c32d DC |
2992 | default: |
2993 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 2994 | _("non-aggregate type in value_aggregate_elt")); |
79c2c32d DC |
2995 | } |
2996 | } | |
2997 | ||
072bba3b KS |
2998 | /* Compares the two method/function types T1 and T2 for "equality" |
2999 | with respect to the the methods' parameters. If the types of the | |
3000 | two parameter lists are the same, returns 1; 0 otherwise. This | |
3001 | comparison may ignore any artificial parameters in T1 if | |
3002 | SKIP_ARTIFICIAL is non-zero. This function will ALWAYS skip | |
3003 | the first artificial parameter in T1, assumed to be a 'this' pointer. | |
3004 | ||
3005 | The type T2 is expected to have come from make_params (in eval.c). */ | |
3006 | ||
3007 | static int | |
3008 | compare_parameters (struct type *t1, struct type *t2, int skip_artificial) | |
3009 | { | |
3010 | int start = 0; | |
3011 | ||
3012 | if (TYPE_FIELD_ARTIFICIAL (t1, 0)) | |
3013 | ++start; | |
3014 | ||
3015 | /* If skipping artificial fields, find the first real field | |
3016 | in T1. */ | |
3017 | if (skip_artificial) | |
3018 | { | |
3019 | while (start < TYPE_NFIELDS (t1) | |
3020 | && TYPE_FIELD_ARTIFICIAL (t1, start)) | |
3021 | ++start; | |
3022 | } | |
3023 | ||
3024 | /* Now compare parameters */ | |
3025 | ||
3026 | /* Special case: a method taking void. T1 will contain no | |
3027 | non-artificial fields, and T2 will contain TYPE_CODE_VOID. */ | |
3028 | if ((TYPE_NFIELDS (t1) - start) == 0 && TYPE_NFIELDS (t2) == 1 | |
3029 | && TYPE_CODE (TYPE_FIELD_TYPE (t2, 0)) == TYPE_CODE_VOID) | |
3030 | return 1; | |
3031 | ||
3032 | if ((TYPE_NFIELDS (t1) - start) == TYPE_NFIELDS (t2)) | |
3033 | { | |
3034 | int i; | |
a109c7c1 | 3035 | |
072bba3b KS |
3036 | for (i = 0; i < TYPE_NFIELDS (t2); ++i) |
3037 | { | |
3038 | if (rank_one_type (TYPE_FIELD_TYPE (t1, start + i), | |
3039 | TYPE_FIELD_TYPE (t2, i)) | |
3040 | != 0) | |
3041 | return 0; | |
3042 | } | |
3043 | ||
3044 | return 1; | |
3045 | } | |
3046 | ||
3047 | return 0; | |
3048 | } | |
3049 | ||
c906108c | 3050 | /* C++: Given an aggregate type CURTYPE, and a member name NAME, |
ac3eeb49 MS |
3051 | return the address of this member as a "pointer to member" type. |
3052 | If INTYPE is non-null, then it will be the type of the member we | |
3053 | are looking for. This will help us resolve "pointers to member | |
3054 | functions". This function is used to resolve user expressions of | |
3055 | the form "DOMAIN::NAME". */ | |
c906108c | 3056 | |
63d06c5c | 3057 | static struct value * |
fba45db2 KB |
3058 | value_struct_elt_for_reference (struct type *domain, int offset, |
3059 | struct type *curtype, char *name, | |
ac3eeb49 MS |
3060 | struct type *intype, |
3061 | int want_address, | |
63d06c5c | 3062 | enum noside noside) |
c906108c | 3063 | { |
52f0bd74 AC |
3064 | struct type *t = curtype; |
3065 | int i; | |
0d5de010 | 3066 | struct value *v, *result; |
c906108c | 3067 | |
c5aa993b | 3068 | if (TYPE_CODE (t) != TYPE_CODE_STRUCT |
c906108c | 3069 | && TYPE_CODE (t) != TYPE_CODE_UNION) |
8a3fe4f8 | 3070 | error (_("Internal error: non-aggregate type to value_struct_elt_for_reference")); |
c906108c SS |
3071 | |
3072 | for (i = TYPE_NFIELDS (t) - 1; i >= TYPE_N_BASECLASSES (t); i--) | |
3073 | { | |
3074 | char *t_field_name = TYPE_FIELD_NAME (t, i); | |
c5aa993b | 3075 | |
6314a349 | 3076 | if (t_field_name && strcmp (t_field_name, name) == 0) |
c906108c | 3077 | { |
d6a843b5 | 3078 | if (field_is_static (&TYPE_FIELD (t, i))) |
c906108c SS |
3079 | { |
3080 | v = value_static_field (t, i); | |
3081 | if (v == NULL) | |
8a3fe4f8 | 3082 | error (_("static field %s has been optimized out"), |
c906108c | 3083 | name); |
0d5de010 DJ |
3084 | if (want_address) |
3085 | v = value_addr (v); | |
c906108c SS |
3086 | return v; |
3087 | } | |
3088 | if (TYPE_FIELD_PACKED (t, i)) | |
8a3fe4f8 | 3089 | error (_("pointers to bitfield members not allowed")); |
c5aa993b | 3090 | |
0d5de010 DJ |
3091 | if (want_address) |
3092 | return value_from_longest | |
3093 | (lookup_memberptr_type (TYPE_FIELD_TYPE (t, i), domain), | |
3094 | offset + (LONGEST) (TYPE_FIELD_BITPOS (t, i) >> 3)); | |
3095 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
3096 | return allocate_value (TYPE_FIELD_TYPE (t, i)); | |
3097 | else | |
3098 | error (_("Cannot reference non-static field \"%s\""), name); | |
c906108c SS |
3099 | } |
3100 | } | |
3101 | ||
ac3eeb49 MS |
3102 | /* C++: If it was not found as a data field, then try to return it |
3103 | as a pointer to a method. */ | |
c906108c | 3104 | |
c906108c SS |
3105 | /* Perform all necessary dereferencing. */ |
3106 | while (intype && TYPE_CODE (intype) == TYPE_CODE_PTR) | |
3107 | intype = TYPE_TARGET_TYPE (intype); | |
3108 | ||
3109 | for (i = TYPE_NFN_FIELDS (t) - 1; i >= 0; --i) | |
3110 | { | |
3111 | char *t_field_name = TYPE_FN_FIELDLIST_NAME (t, i); | |
3112 | char dem_opname[64]; | |
3113 | ||
ac3eeb49 MS |
3114 | if (strncmp (t_field_name, "__", 2) == 0 |
3115 | || strncmp (t_field_name, "op", 2) == 0 | |
3116 | || strncmp (t_field_name, "type", 4) == 0) | |
c906108c | 3117 | { |
ac3eeb49 MS |
3118 | if (cplus_demangle_opname (t_field_name, |
3119 | dem_opname, DMGL_ANSI)) | |
c5aa993b | 3120 | t_field_name = dem_opname; |
ac3eeb49 MS |
3121 | else if (cplus_demangle_opname (t_field_name, |
3122 | dem_opname, 0)) | |
c906108c | 3123 | t_field_name = dem_opname; |
c906108c | 3124 | } |
6314a349 | 3125 | if (t_field_name && strcmp (t_field_name, name) == 0) |
c906108c | 3126 | { |
072bba3b KS |
3127 | int j; |
3128 | int len = TYPE_FN_FIELDLIST_LENGTH (t, i); | |
c906108c | 3129 | struct fn_field *f = TYPE_FN_FIELDLIST1 (t, i); |
c5aa993b | 3130 | |
de17c821 DJ |
3131 | check_stub_method_group (t, i); |
3132 | ||
c906108c SS |
3133 | if (intype) |
3134 | { | |
072bba3b KS |
3135 | for (j = 0; j < len; ++j) |
3136 | { | |
3137 | if (compare_parameters (TYPE_FN_FIELD_TYPE (f, j), intype, 0) | |
3138 | || compare_parameters (TYPE_FN_FIELD_TYPE (f, j), intype, 1)) | |
3139 | break; | |
3140 | } | |
3141 | ||
3142 | if (j == len) | |
7f79b1c5 DJ |
3143 | error (_("no member function matches that type instantiation")); |
3144 | } | |
c906108c | 3145 | else |
072bba3b KS |
3146 | { |
3147 | int ii; | |
7f79b1c5 DJ |
3148 | |
3149 | j = -1; | |
072bba3b KS |
3150 | for (ii = 0; ii < TYPE_FN_FIELDLIST_LENGTH (t, i); |
3151 | ++ii) | |
3152 | { | |
7f79b1c5 DJ |
3153 | /* Skip artificial methods. This is necessary if, |
3154 | for example, the user wants to "print | |
3155 | subclass::subclass" with only one user-defined | |
3156 | constructor. There is no ambiguity in this | |
3157 | case. */ | |
072bba3b | 3158 | if (TYPE_FN_FIELD_ARTIFICIAL (f, ii)) |
7f79b1c5 | 3159 | continue; |
072bba3b | 3160 | |
7f79b1c5 DJ |
3161 | /* Desired method is ambiguous if more than one |
3162 | method is defined. */ | |
3163 | if (j != -1) | |
3164 | error (_("non-unique member `%s' requires type instantiation"), name); | |
072bba3b | 3165 | |
7f79b1c5 DJ |
3166 | j = ii; |
3167 | } | |
072bba3b | 3168 | } |
c5aa993b | 3169 | |
0d5de010 DJ |
3170 | if (TYPE_FN_FIELD_STATIC_P (f, j)) |
3171 | { | |
ac3eeb49 MS |
3172 | struct symbol *s = |
3173 | lookup_symbol (TYPE_FN_FIELD_PHYSNAME (f, j), | |
2570f2b7 | 3174 | 0, VAR_DOMAIN, 0); |
a109c7c1 | 3175 | |
0d5de010 DJ |
3176 | if (s == NULL) |
3177 | return NULL; | |
3178 | ||
3179 | if (want_address) | |
3180 | return value_addr (read_var_value (s, 0)); | |
3181 | else | |
3182 | return read_var_value (s, 0); | |
3183 | } | |
3184 | ||
c906108c SS |
3185 | if (TYPE_FN_FIELD_VIRTUAL_P (f, j)) |
3186 | { | |
0d5de010 DJ |
3187 | if (want_address) |
3188 | { | |
3189 | result = allocate_value | |
3190 | (lookup_methodptr_type (TYPE_FN_FIELD_TYPE (f, j))); | |
ad4820ab UW |
3191 | cplus_make_method_ptr (value_type (result), |
3192 | value_contents_writeable (result), | |
0d5de010 DJ |
3193 | TYPE_FN_FIELD_VOFFSET (f, j), 1); |
3194 | } | |
3195 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
3196 | return allocate_value (TYPE_FN_FIELD_TYPE (f, j)); | |
3197 | else | |
3198 | error (_("Cannot reference virtual member function \"%s\""), | |
3199 | name); | |
c906108c SS |
3200 | } |
3201 | else | |
3202 | { | |
ac3eeb49 MS |
3203 | struct symbol *s = |
3204 | lookup_symbol (TYPE_FN_FIELD_PHYSNAME (f, j), | |
2570f2b7 | 3205 | 0, VAR_DOMAIN, 0); |
a109c7c1 | 3206 | |
c906108c | 3207 | if (s == NULL) |
0d5de010 DJ |
3208 | return NULL; |
3209 | ||
3210 | v = read_var_value (s, 0); | |
3211 | if (!want_address) | |
3212 | result = v; | |
c906108c SS |
3213 | else |
3214 | { | |
0d5de010 | 3215 | result = allocate_value (lookup_methodptr_type (TYPE_FN_FIELD_TYPE (f, j))); |
ad4820ab UW |
3216 | cplus_make_method_ptr (value_type (result), |
3217 | value_contents_writeable (result), | |
42ae5230 | 3218 | value_address (v), 0); |
c906108c | 3219 | } |
c906108c | 3220 | } |
0d5de010 | 3221 | return result; |
c906108c SS |
3222 | } |
3223 | } | |
3224 | for (i = TYPE_N_BASECLASSES (t) - 1; i >= 0; i--) | |
3225 | { | |
f23631e4 | 3226 | struct value *v; |
c906108c SS |
3227 | int base_offset; |
3228 | ||
3229 | if (BASETYPE_VIA_VIRTUAL (t, i)) | |
3230 | base_offset = 0; | |
3231 | else | |
3232 | base_offset = TYPE_BASECLASS_BITPOS (t, i) / 8; | |
3233 | v = value_struct_elt_for_reference (domain, | |
3234 | offset + base_offset, | |
3235 | TYPE_BASECLASS (t, i), | |
ac3eeb49 MS |
3236 | name, intype, |
3237 | want_address, noside); | |
c906108c SS |
3238 | if (v) |
3239 | return v; | |
3240 | } | |
63d06c5c DC |
3241 | |
3242 | /* As a last chance, pretend that CURTYPE is a namespace, and look | |
3243 | it up that way; this (frequently) works for types nested inside | |
3244 | classes. */ | |
3245 | ||
ac3eeb49 MS |
3246 | return value_maybe_namespace_elt (curtype, name, |
3247 | want_address, noside); | |
c906108c SS |
3248 | } |
3249 | ||
79c2c32d DC |
3250 | /* C++: Return the member NAME of the namespace given by the type |
3251 | CURTYPE. */ | |
3252 | ||
3253 | static struct value * | |
3254 | value_namespace_elt (const struct type *curtype, | |
0d5de010 | 3255 | char *name, int want_address, |
79c2c32d | 3256 | enum noside noside) |
63d06c5c DC |
3257 | { |
3258 | struct value *retval = value_maybe_namespace_elt (curtype, name, | |
ac3eeb49 MS |
3259 | want_address, |
3260 | noside); | |
63d06c5c DC |
3261 | |
3262 | if (retval == NULL) | |
ac3eeb49 MS |
3263 | error (_("No symbol \"%s\" in namespace \"%s\"."), |
3264 | name, TYPE_TAG_NAME (curtype)); | |
63d06c5c DC |
3265 | |
3266 | return retval; | |
3267 | } | |
3268 | ||
3269 | /* A helper function used by value_namespace_elt and | |
3270 | value_struct_elt_for_reference. It looks up NAME inside the | |
3271 | context CURTYPE; this works if CURTYPE is a namespace or if CURTYPE | |
3272 | is a class and NAME refers to a type in CURTYPE itself (as opposed | |
3273 | to, say, some base class of CURTYPE). */ | |
3274 | ||
3275 | static struct value * | |
3276 | value_maybe_namespace_elt (const struct type *curtype, | |
0d5de010 | 3277 | char *name, int want_address, |
63d06c5c | 3278 | enum noside noside) |
79c2c32d DC |
3279 | { |
3280 | const char *namespace_name = TYPE_TAG_NAME (curtype); | |
3281 | struct symbol *sym; | |
0d5de010 | 3282 | struct value *result; |
79c2c32d | 3283 | |
13387711 | 3284 | sym = cp_lookup_symbol_namespace (namespace_name, name, |
41f62f39 JK |
3285 | get_selected_block (0), VAR_DOMAIN); |
3286 | ||
3287 | if (sym == NULL) | |
3288 | { | |
3289 | char *concatenated_name = alloca (strlen (namespace_name) + 2 | |
3290 | + strlen (name) + 1); | |
3291 | ||
3292 | sprintf (concatenated_name, "%s::%s", namespace_name, name); | |
3293 | sym = lookup_static_symbol_aux (concatenated_name, VAR_DOMAIN); | |
3294 | } | |
79c2c32d DC |
3295 | |
3296 | if (sym == NULL) | |
63d06c5c | 3297 | return NULL; |
79c2c32d DC |
3298 | else if ((noside == EVAL_AVOID_SIDE_EFFECTS) |
3299 | && (SYMBOL_CLASS (sym) == LOC_TYPEDEF)) | |
0d5de010 | 3300 | result = allocate_value (SYMBOL_TYPE (sym)); |
79c2c32d | 3301 | else |
0d5de010 DJ |
3302 | result = value_of_variable (sym, get_selected_block (0)); |
3303 | ||
3304 | if (result && want_address) | |
3305 | result = value_addr (result); | |
3306 | ||
3307 | return result; | |
79c2c32d DC |
3308 | } |
3309 | ||
ac3eeb49 MS |
3310 | /* Given a pointer value V, find the real (RTTI) type of the object it |
3311 | points to. | |
3312 | ||
c906108c | 3313 | Other parameters FULL, TOP, USING_ENC as with value_rtti_type() |
ac3eeb49 | 3314 | and refer to the values computed for the object pointed to. */ |
c906108c SS |
3315 | |
3316 | struct type * | |
ac3eeb49 MS |
3317 | value_rtti_target_type (struct value *v, int *full, |
3318 | int *top, int *using_enc) | |
c906108c | 3319 | { |
f23631e4 | 3320 | struct value *target; |
c906108c SS |
3321 | |
3322 | target = value_ind (v); | |
3323 | ||
3324 | return value_rtti_type (target, full, top, using_enc); | |
3325 | } | |
3326 | ||
3327 | /* Given a value pointed to by ARGP, check its real run-time type, and | |
3328 | if that is different from the enclosing type, create a new value | |
3329 | using the real run-time type as the enclosing type (and of the same | |
3330 | type as ARGP) and return it, with the embedded offset adjusted to | |
ac3eeb49 MS |
3331 | be the correct offset to the enclosed object. RTYPE is the type, |
3332 | and XFULL, XTOP, and XUSING_ENC are the other parameters, computed | |
3333 | by value_rtti_type(). If these are available, they can be supplied | |
3334 | and a second call to value_rtti_type() is avoided. (Pass RTYPE == | |
3335 | NULL if they're not available. */ | |
c906108c | 3336 | |
f23631e4 | 3337 | struct value * |
ac3eeb49 MS |
3338 | value_full_object (struct value *argp, |
3339 | struct type *rtype, | |
3340 | int xfull, int xtop, | |
fba45db2 | 3341 | int xusing_enc) |
c906108c | 3342 | { |
c5aa993b | 3343 | struct type *real_type; |
c906108c SS |
3344 | int full = 0; |
3345 | int top = -1; | |
3346 | int using_enc = 0; | |
f23631e4 | 3347 | struct value *new_val; |
c906108c SS |
3348 | |
3349 | if (rtype) | |
3350 | { | |
3351 | real_type = rtype; | |
3352 | full = xfull; | |
3353 | top = xtop; | |
3354 | using_enc = xusing_enc; | |
3355 | } | |
3356 | else | |
3357 | real_type = value_rtti_type (argp, &full, &top, &using_enc); | |
3358 | ||
ac3eeb49 | 3359 | /* If no RTTI data, or if object is already complete, do nothing. */ |
4754a64e | 3360 | if (!real_type || real_type == value_enclosing_type (argp)) |
c906108c SS |
3361 | return argp; |
3362 | ||
3363 | /* If we have the full object, but for some reason the enclosing | |
ac3eeb49 MS |
3364 | type is wrong, set it. */ |
3365 | /* pai: FIXME -- sounds iffy */ | |
c906108c SS |
3366 | if (full) |
3367 | { | |
2b127877 | 3368 | argp = value_change_enclosing_type (argp, real_type); |
c906108c SS |
3369 | return argp; |
3370 | } | |
3371 | ||
3372 | /* Check if object is in memory */ | |
3373 | if (VALUE_LVAL (argp) != lval_memory) | |
3374 | { | |
ac3eeb49 MS |
3375 | warning (_("Couldn't retrieve complete object of RTTI type %s; object may be in register(s)."), |
3376 | TYPE_NAME (real_type)); | |
c5aa993b | 3377 | |
c906108c SS |
3378 | return argp; |
3379 | } | |
c5aa993b | 3380 | |
ac3eeb49 MS |
3381 | /* All other cases -- retrieve the complete object. */ |
3382 | /* Go back by the computed top_offset from the beginning of the | |
3383 | object, adjusting for the embedded offset of argp if that's what | |
3384 | value_rtti_type used for its computation. */ | |
42ae5230 | 3385 | new_val = value_at_lazy (real_type, value_address (argp) - top + |
13c3b5f5 | 3386 | (using_enc ? 0 : value_embedded_offset (argp))); |
04624583 | 3387 | deprecated_set_value_type (new_val, value_type (argp)); |
13c3b5f5 AC |
3388 | set_value_embedded_offset (new_val, (using_enc |
3389 | ? top + value_embedded_offset (argp) | |
3390 | : top)); | |
c906108c SS |
3391 | return new_val; |
3392 | } | |
3393 | ||
389e51db | 3394 | |
d069f99d | 3395 | /* Return the value of the local variable, if one exists. |
c906108c SS |
3396 | Flag COMPLAIN signals an error if the request is made in an |
3397 | inappropriate context. */ | |
3398 | ||
f23631e4 | 3399 | struct value * |
d069f99d | 3400 | value_of_local (const char *name, int complain) |
c906108c SS |
3401 | { |
3402 | struct symbol *func, *sym; | |
3403 | struct block *b; | |
d069f99d | 3404 | struct value * ret; |
206415a3 | 3405 | struct frame_info *frame; |
c906108c | 3406 | |
206415a3 DJ |
3407 | if (complain) |
3408 | frame = get_selected_frame (_("no frame selected")); | |
3409 | else | |
c906108c | 3410 | { |
206415a3 DJ |
3411 | frame = deprecated_safe_get_selected_frame (); |
3412 | if (frame == 0) | |
c5aa993b | 3413 | return 0; |
c906108c SS |
3414 | } |
3415 | ||
206415a3 | 3416 | func = get_frame_function (frame); |
c906108c SS |
3417 | if (!func) |
3418 | { | |
3419 | if (complain) | |
8a3fe4f8 | 3420 | error (_("no `%s' in nameless context"), name); |
c5aa993b JM |
3421 | else |
3422 | return 0; | |
c906108c SS |
3423 | } |
3424 | ||
3425 | b = SYMBOL_BLOCK_VALUE (func); | |
de4f826b | 3426 | if (dict_empty (BLOCK_DICT (b))) |
c906108c SS |
3427 | { |
3428 | if (complain) | |
8a3fe4f8 | 3429 | error (_("no args, no `%s'"), name); |
c5aa993b JM |
3430 | else |
3431 | return 0; | |
c906108c SS |
3432 | } |
3433 | ||
3434 | /* Calling lookup_block_symbol is necessary to get the LOC_REGISTER | |
3435 | symbol instead of the LOC_ARG one (if both exist). */ | |
94af9270 | 3436 | sym = lookup_block_symbol (b, name, VAR_DOMAIN); |
c906108c SS |
3437 | if (sym == NULL) |
3438 | { | |
3439 | if (complain) | |
ac3eeb49 MS |
3440 | error (_("current stack frame does not contain a variable named `%s'"), |
3441 | name); | |
c906108c SS |
3442 | else |
3443 | return NULL; | |
3444 | } | |
3445 | ||
206415a3 | 3446 | ret = read_var_value (sym, frame); |
d069f99d | 3447 | if (ret == 0 && complain) |
8a3fe4f8 | 3448 | error (_("`%s' argument unreadable"), name); |
d069f99d AF |
3449 | return ret; |
3450 | } | |
3451 | ||
3452 | /* C++/Objective-C: return the value of the class instance variable, | |
3453 | if one exists. Flag COMPLAIN signals an error if the request is | |
3454 | made in an inappropriate context. */ | |
3455 | ||
3456 | struct value * | |
3457 | value_of_this (int complain) | |
3458 | { | |
2b2d9e11 VP |
3459 | if (!current_language->la_name_of_this) |
3460 | return 0; | |
3461 | return value_of_local (current_language->la_name_of_this, complain); | |
c906108c SS |
3462 | } |
3463 | ||
ac3eeb49 MS |
3464 | /* Create a slice (sub-string, sub-array) of ARRAY, that is LENGTH |
3465 | elements long, starting at LOWBOUND. The result has the same lower | |
3466 | bound as the original ARRAY. */ | |
c906108c | 3467 | |
f23631e4 AC |
3468 | struct value * |
3469 | value_slice (struct value *array, int lowbound, int length) | |
c906108c SS |
3470 | { |
3471 | struct type *slice_range_type, *slice_type, *range_type; | |
7a67d0fe | 3472 | LONGEST lowerbound, upperbound; |
f23631e4 | 3473 | struct value *slice; |
c906108c | 3474 | struct type *array_type; |
ac3eeb49 | 3475 | |
df407dfe | 3476 | array_type = check_typedef (value_type (array)); |
c906108c SS |
3477 | if (TYPE_CODE (array_type) != TYPE_CODE_ARRAY |
3478 | && TYPE_CODE (array_type) != TYPE_CODE_STRING | |
3479 | && TYPE_CODE (array_type) != TYPE_CODE_BITSTRING) | |
8a3fe4f8 | 3480 | error (_("cannot take slice of non-array")); |
ac3eeb49 | 3481 | |
c906108c SS |
3482 | range_type = TYPE_INDEX_TYPE (array_type); |
3483 | if (get_discrete_bounds (range_type, &lowerbound, &upperbound) < 0) | |
8a3fe4f8 | 3484 | error (_("slice from bad array or bitstring")); |
ac3eeb49 | 3485 | |
c906108c | 3486 | if (lowbound < lowerbound || length < 0 |
db034ac5 | 3487 | || lowbound + length - 1 > upperbound) |
8a3fe4f8 | 3488 | error (_("slice out of range")); |
ac3eeb49 | 3489 | |
c906108c SS |
3490 | /* FIXME-type-allocation: need a way to free this type when we are |
3491 | done with it. */ | |
c5aa993b | 3492 | slice_range_type = create_range_type ((struct type *) NULL, |
c906108c | 3493 | TYPE_TARGET_TYPE (range_type), |
ac3eeb49 MS |
3494 | lowbound, |
3495 | lowbound + length - 1); | |
c906108c SS |
3496 | if (TYPE_CODE (array_type) == TYPE_CODE_BITSTRING) |
3497 | { | |
3498 | int i; | |
ac3eeb49 MS |
3499 | |
3500 | slice_type = create_set_type ((struct type *) NULL, | |
3501 | slice_range_type); | |
c906108c SS |
3502 | TYPE_CODE (slice_type) = TYPE_CODE_BITSTRING; |
3503 | slice = value_zero (slice_type, not_lval); | |
ac3eeb49 | 3504 | |
c906108c SS |
3505 | for (i = 0; i < length; i++) |
3506 | { | |
3507 | int element = value_bit_index (array_type, | |
0fd88904 | 3508 | value_contents (array), |
c906108c | 3509 | lowbound + i); |
a109c7c1 | 3510 | |
c906108c | 3511 | if (element < 0) |
8a3fe4f8 | 3512 | error (_("internal error accessing bitstring")); |
c906108c SS |
3513 | else if (element > 0) |
3514 | { | |
3515 | int j = i % TARGET_CHAR_BIT; | |
a109c7c1 | 3516 | |
50810684 | 3517 | if (gdbarch_bits_big_endian (get_type_arch (array_type))) |
c906108c | 3518 | j = TARGET_CHAR_BIT - 1 - j; |
990a07ab | 3519 | value_contents_raw (slice)[i / TARGET_CHAR_BIT] |= (1 << j); |
c906108c SS |
3520 | } |
3521 | } | |
ac3eeb49 MS |
3522 | /* We should set the address, bitssize, and bitspos, so the |
3523 | slice can be used on the LHS, but that may require extensions | |
3524 | to value_assign. For now, just leave as a non_lval. | |
3525 | FIXME. */ | |
c906108c SS |
3526 | } |
3527 | else | |
3528 | { | |
3529 | struct type *element_type = TYPE_TARGET_TYPE (array_type); | |
ac3eeb49 MS |
3530 | LONGEST offset = |
3531 | (lowbound - lowerbound) * TYPE_LENGTH (check_typedef (element_type)); | |
3532 | ||
3533 | slice_type = create_array_type ((struct type *) NULL, | |
3534 | element_type, | |
c906108c SS |
3535 | slice_range_type); |
3536 | TYPE_CODE (slice_type) = TYPE_CODE (array_type); | |
ac3eeb49 | 3537 | |
9214ee5f | 3538 | if (VALUE_LVAL (array) == lval_memory && value_lazy (array)) |
3e3d7139 | 3539 | slice = allocate_value_lazy (slice_type); |
c906108c | 3540 | else |
3e3d7139 JG |
3541 | { |
3542 | slice = allocate_value (slice_type); | |
3543 | memcpy (value_contents_writeable (slice), | |
3544 | value_contents (array) + offset, | |
3545 | TYPE_LENGTH (slice_type)); | |
3546 | } | |
ac3eeb49 | 3547 | |
74bcbdf3 | 3548 | set_value_component_location (slice, array); |
65d3800a | 3549 | VALUE_FRAME_ID (slice) = VALUE_FRAME_ID (array); |
f5cf64a7 | 3550 | set_value_offset (slice, value_offset (array) + offset); |
c906108c SS |
3551 | } |
3552 | return slice; | |
3553 | } | |
3554 | ||
ac3eeb49 MS |
3555 | /* Create a value for a FORTRAN complex number. Currently most of the |
3556 | time values are coerced to COMPLEX*16 (i.e. a complex number | |
070ad9f0 DB |
3557 | composed of 2 doubles. This really should be a smarter routine |
3558 | that figures out precision inteligently as opposed to assuming | |
ac3eeb49 | 3559 | doubles. FIXME: fmb */ |
c906108c | 3560 | |
f23631e4 | 3561 | struct value * |
ac3eeb49 MS |
3562 | value_literal_complex (struct value *arg1, |
3563 | struct value *arg2, | |
3564 | struct type *type) | |
c906108c | 3565 | { |
f23631e4 | 3566 | struct value *val; |
c906108c SS |
3567 | struct type *real_type = TYPE_TARGET_TYPE (type); |
3568 | ||
3569 | val = allocate_value (type); | |
3570 | arg1 = value_cast (real_type, arg1); | |
3571 | arg2 = value_cast (real_type, arg2); | |
3572 | ||
990a07ab | 3573 | memcpy (value_contents_raw (val), |
0fd88904 | 3574 | value_contents (arg1), TYPE_LENGTH (real_type)); |
990a07ab | 3575 | memcpy (value_contents_raw (val) + TYPE_LENGTH (real_type), |
0fd88904 | 3576 | value_contents (arg2), TYPE_LENGTH (real_type)); |
c906108c SS |
3577 | return val; |
3578 | } | |
3579 | ||
ac3eeb49 | 3580 | /* Cast a value into the appropriate complex data type. */ |
c906108c | 3581 | |
f23631e4 AC |
3582 | static struct value * |
3583 | cast_into_complex (struct type *type, struct value *val) | |
c906108c SS |
3584 | { |
3585 | struct type *real_type = TYPE_TARGET_TYPE (type); | |
ac3eeb49 | 3586 | |
df407dfe | 3587 | if (TYPE_CODE (value_type (val)) == TYPE_CODE_COMPLEX) |
c906108c | 3588 | { |
df407dfe | 3589 | struct type *val_real_type = TYPE_TARGET_TYPE (value_type (val)); |
f23631e4 AC |
3590 | struct value *re_val = allocate_value (val_real_type); |
3591 | struct value *im_val = allocate_value (val_real_type); | |
c906108c | 3592 | |
990a07ab | 3593 | memcpy (value_contents_raw (re_val), |
0fd88904 | 3594 | value_contents (val), TYPE_LENGTH (val_real_type)); |
990a07ab | 3595 | memcpy (value_contents_raw (im_val), |
0fd88904 | 3596 | value_contents (val) + TYPE_LENGTH (val_real_type), |
c5aa993b | 3597 | TYPE_LENGTH (val_real_type)); |
c906108c SS |
3598 | |
3599 | return value_literal_complex (re_val, im_val, type); | |
3600 | } | |
df407dfe AC |
3601 | else if (TYPE_CODE (value_type (val)) == TYPE_CODE_FLT |
3602 | || TYPE_CODE (value_type (val)) == TYPE_CODE_INT) | |
ac3eeb49 MS |
3603 | return value_literal_complex (val, |
3604 | value_zero (real_type, not_lval), | |
3605 | type); | |
c906108c | 3606 | else |
8a3fe4f8 | 3607 | error (_("cannot cast non-number to complex")); |
c906108c SS |
3608 | } |
3609 | ||
3610 | void | |
fba45db2 | 3611 | _initialize_valops (void) |
c906108c | 3612 | { |
5bf193a2 AC |
3613 | add_setshow_boolean_cmd ("overload-resolution", class_support, |
3614 | &overload_resolution, _("\ | |
3615 | Set overload resolution in evaluating C++ functions."), _("\ | |
ac3eeb49 MS |
3616 | Show overload resolution in evaluating C++ functions."), |
3617 | NULL, NULL, | |
920d2a44 | 3618 | show_overload_resolution, |
5bf193a2 | 3619 | &setlist, &showlist); |
c906108c | 3620 | overload_resolution = 1; |
c906108c | 3621 | } |