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, | |
5 | 2008 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" |
c906108c SS |
40 | |
41 | #include <errno.h> | |
42 | #include "gdb_string.h" | |
4a1970e4 | 43 | #include "gdb_assert.h" |
79c2c32d | 44 | #include "cp-support.h" |
f4c5303c | 45 | #include "observer.h" |
c906108c | 46 | |
070ad9f0 | 47 | extern int overload_debug; |
c906108c SS |
48 | /* Local functions. */ |
49 | ||
ad2f7632 DJ |
50 | static int typecmp (int staticp, int varargs, int nargs, |
51 | struct field t1[], struct value *t2[]); | |
c906108c | 52 | |
ac3eeb49 MS |
53 | static struct value *search_struct_field (char *, struct value *, |
54 | int, struct type *, int); | |
c906108c | 55 | |
f23631e4 AC |
56 | static struct value *search_struct_method (char *, struct value **, |
57 | struct value **, | |
a14ed312 | 58 | int, int *, struct type *); |
c906108c | 59 | |
ac3eeb49 MS |
60 | static int find_oload_champ_namespace (struct type **, int, |
61 | const char *, const char *, | |
62 | struct symbol ***, | |
63 | struct badness_vector **); | |
8d577d32 DC |
64 | |
65 | static | |
ac3eeb49 MS |
66 | int find_oload_champ_namespace_loop (struct type **, int, |
67 | const char *, const char *, | |
68 | int, struct symbol ***, | |
69 | struct badness_vector **, int *); | |
70 | ||
71 | static int find_oload_champ (struct type **, int, int, int, | |
72 | struct fn_field *, struct symbol **, | |
73 | struct badness_vector **); | |
74 | ||
75 | static int oload_method_static (int, struct fn_field *, int); | |
8d577d32 DC |
76 | |
77 | enum oload_classification { STANDARD, NON_STANDARD, INCOMPATIBLE }; | |
78 | ||
79 | static enum | |
ac3eeb49 MS |
80 | oload_classification classify_oload_match (struct badness_vector *, |
81 | int, int); | |
8d577d32 | 82 | |
a14ed312 | 83 | static int check_field_in (struct type *, const char *); |
c906108c | 84 | |
ac3eeb49 MS |
85 | static struct value *value_struct_elt_for_reference (struct type *, |
86 | int, struct type *, | |
87 | char *, | |
88 | struct type *, | |
89 | int, enum noside); | |
79c2c32d | 90 | |
ac3eeb49 MS |
91 | static struct value *value_namespace_elt (const struct type *, |
92 | char *, int , enum noside); | |
79c2c32d | 93 | |
ac3eeb49 MS |
94 | static struct value *value_maybe_namespace_elt (const struct type *, |
95 | char *, int, | |
96 | enum noside); | |
63d06c5c | 97 | |
a14ed312 | 98 | static CORE_ADDR allocate_space_in_inferior (int); |
c906108c | 99 | |
f23631e4 | 100 | static struct value *cast_into_complex (struct type *, struct value *); |
c906108c | 101 | |
ac3eeb49 MS |
102 | static struct fn_field *find_method_list (struct value **, char *, |
103 | int, struct type *, int *, | |
104 | struct type **, int *); | |
7a292a7a | 105 | |
a14ed312 | 106 | void _initialize_valops (void); |
c906108c | 107 | |
c906108c | 108 | #if 0 |
ac3eeb49 MS |
109 | /* Flag for whether we want to abandon failed expression evals by |
110 | default. */ | |
111 | ||
c906108c SS |
112 | static int auto_abandon = 0; |
113 | #endif | |
114 | ||
115 | int overload_resolution = 0; | |
920d2a44 AC |
116 | static void |
117 | show_overload_resolution (struct ui_file *file, int from_tty, | |
ac3eeb49 MS |
118 | struct cmd_list_element *c, |
119 | const char *value) | |
920d2a44 AC |
120 | { |
121 | fprintf_filtered (file, _("\ | |
122 | Overload resolution in evaluating C++ functions is %s.\n"), | |
123 | value); | |
124 | } | |
242bfc55 | 125 | |
c906108c SS |
126 | /* Find the address of function name NAME in the inferior. */ |
127 | ||
f23631e4 | 128 | struct value * |
3bada2a2 | 129 | find_function_in_inferior (const char *name) |
c906108c | 130 | { |
52f0bd74 | 131 | struct symbol *sym; |
176620f1 | 132 | sym = lookup_symbol (name, 0, VAR_DOMAIN, 0, NULL); |
c906108c SS |
133 | if (sym != NULL) |
134 | { | |
135 | if (SYMBOL_CLASS (sym) != LOC_BLOCK) | |
136 | { | |
8a3fe4f8 | 137 | error (_("\"%s\" exists in this program but is not a function."), |
c906108c SS |
138 | name); |
139 | } | |
140 | return value_of_variable (sym, NULL); | |
141 | } | |
142 | else | |
143 | { | |
ac3eeb49 MS |
144 | struct minimal_symbol *msymbol = |
145 | lookup_minimal_symbol (name, NULL, NULL); | |
c906108c SS |
146 | if (msymbol != NULL) |
147 | { | |
148 | struct type *type; | |
4478b372 | 149 | CORE_ADDR maddr; |
c906108c SS |
150 | type = lookup_pointer_type (builtin_type_char); |
151 | type = lookup_function_type (type); | |
152 | type = lookup_pointer_type (type); | |
4478b372 JB |
153 | maddr = SYMBOL_VALUE_ADDRESS (msymbol); |
154 | return value_from_pointer (type, maddr); | |
c906108c SS |
155 | } |
156 | else | |
157 | { | |
c5aa993b | 158 | if (!target_has_execution) |
8a3fe4f8 | 159 | error (_("evaluation of this expression requires the target program to be active")); |
c5aa993b | 160 | else |
8a3fe4f8 | 161 | error (_("evaluation of this expression requires the program to have a function \"%s\"."), name); |
c906108c SS |
162 | } |
163 | } | |
164 | } | |
165 | ||
ac3eeb49 MS |
166 | /* Allocate NBYTES of space in the inferior using the inferior's |
167 | malloc and return a value that is a pointer to the allocated | |
168 | space. */ | |
c906108c | 169 | |
f23631e4 | 170 | struct value * |
fba45db2 | 171 | value_allocate_space_in_inferior (int len) |
c906108c | 172 | { |
f23631e4 | 173 | struct value *blocklen; |
ac3eeb49 MS |
174 | struct value *val = |
175 | find_function_in_inferior (gdbarch_name_of_malloc (current_gdbarch)); | |
c906108c SS |
176 | |
177 | blocklen = value_from_longest (builtin_type_int, (LONGEST) len); | |
178 | val = call_function_by_hand (val, 1, &blocklen); | |
179 | if (value_logical_not (val)) | |
180 | { | |
181 | if (!target_has_execution) | |
8a3fe4f8 | 182 | error (_("No memory available to program now: you need to start the target first")); |
c5aa993b | 183 | else |
8a3fe4f8 | 184 | error (_("No memory available to program: call to malloc failed")); |
c906108c SS |
185 | } |
186 | return val; | |
187 | } | |
188 | ||
189 | static CORE_ADDR | |
fba45db2 | 190 | allocate_space_in_inferior (int len) |
c906108c SS |
191 | { |
192 | return value_as_long (value_allocate_space_in_inferior (len)); | |
193 | } | |
194 | ||
fb933624 DJ |
195 | /* Cast one pointer or reference type to another. Both TYPE and |
196 | the type of ARG2 should be pointer types, or else both should be | |
197 | reference types. Returns the new pointer or reference. */ | |
198 | ||
199 | struct value * | |
200 | value_cast_pointers (struct type *type, struct value *arg2) | |
201 | { | |
202 | struct type *type2 = check_typedef (value_type (arg2)); | |
203 | struct type *t1 = check_typedef (TYPE_TARGET_TYPE (type)); | |
204 | struct type *t2 = check_typedef (TYPE_TARGET_TYPE (type2)); | |
205 | ||
206 | if (TYPE_CODE (t1) == TYPE_CODE_STRUCT | |
207 | && TYPE_CODE (t2) == TYPE_CODE_STRUCT | |
208 | && !value_logical_not (arg2)) | |
209 | { | |
210 | struct value *v; | |
211 | ||
212 | /* Look in the type of the source to see if it contains the | |
213 | type of the target as a superclass. If so, we'll need to | |
214 | offset the pointer rather than just change its type. */ | |
215 | if (TYPE_NAME (t1) != NULL) | |
216 | { | |
217 | struct value *v2; | |
218 | ||
219 | if (TYPE_CODE (type2) == TYPE_CODE_REF) | |
220 | v2 = coerce_ref (arg2); | |
221 | else | |
222 | v2 = value_ind (arg2); | |
223 | v = search_struct_field (type_name_no_tag (t1), | |
224 | v2, 0, t2, 1); | |
225 | if (v) | |
226 | { | |
227 | v = value_addr (v); | |
228 | deprecated_set_value_type (v, type); | |
229 | return v; | |
230 | } | |
231 | } | |
232 | ||
233 | /* Look in the type of the target to see if it contains the | |
234 | type of the source as a superclass. If so, we'll need to | |
235 | offset the pointer rather than just change its type. | |
236 | FIXME: This fails silently with virtual inheritance. */ | |
237 | if (TYPE_NAME (t2) != NULL) | |
238 | { | |
239 | v = search_struct_field (type_name_no_tag (t2), | |
240 | value_zero (t1, not_lval), 0, t1, 1); | |
241 | if (v) | |
242 | { | |
243 | CORE_ADDR addr2 = value_as_address (arg2); | |
244 | addr2 -= (VALUE_ADDRESS (v) | |
245 | + value_offset (v) | |
246 | + value_embedded_offset (v)); | |
247 | return value_from_pointer (type, addr2); | |
248 | } | |
249 | } | |
250 | } | |
251 | ||
252 | /* No superclass found, just change the pointer type. */ | |
0d5de010 | 253 | arg2 = value_copy (arg2); |
fb933624 DJ |
254 | deprecated_set_value_type (arg2, type); |
255 | arg2 = value_change_enclosing_type (arg2, type); | |
256 | set_value_pointed_to_offset (arg2, 0); /* pai: chk_val */ | |
257 | return arg2; | |
258 | } | |
259 | ||
c906108c SS |
260 | /* Cast value ARG2 to type TYPE and return as a value. |
261 | More general than a C cast: accepts any two types of the same length, | |
262 | and if ARG2 is an lvalue it can be cast into anything at all. */ | |
263 | /* In C++, casts may change pointer or object representations. */ | |
264 | ||
f23631e4 AC |
265 | struct value * |
266 | value_cast (struct type *type, struct value *arg2) | |
c906108c | 267 | { |
52f0bd74 AC |
268 | enum type_code code1; |
269 | enum type_code code2; | |
270 | int scalar; | |
c906108c SS |
271 | struct type *type2; |
272 | ||
273 | int convert_to_boolean = 0; | |
c5aa993b | 274 | |
df407dfe | 275 | if (value_type (arg2) == type) |
c906108c SS |
276 | return arg2; |
277 | ||
278 | CHECK_TYPEDEF (type); | |
279 | code1 = TYPE_CODE (type); | |
994b9211 | 280 | arg2 = coerce_ref (arg2); |
df407dfe | 281 | type2 = check_typedef (value_type (arg2)); |
c906108c | 282 | |
fb933624 DJ |
283 | /* You can't cast to a reference type. See value_cast_pointers |
284 | instead. */ | |
285 | gdb_assert (code1 != TYPE_CODE_REF); | |
286 | ||
ac3eeb49 MS |
287 | /* A cast to an undetermined-length array_type, such as |
288 | (TYPE [])OBJECT, is treated like a cast to (TYPE [N])OBJECT, | |
289 | where N is sizeof(OBJECT)/sizeof(TYPE). */ | |
c906108c SS |
290 | if (code1 == TYPE_CODE_ARRAY) |
291 | { | |
292 | struct type *element_type = TYPE_TARGET_TYPE (type); | |
293 | unsigned element_length = TYPE_LENGTH (check_typedef (element_type)); | |
294 | if (element_length > 0 | |
c5aa993b | 295 | && TYPE_ARRAY_UPPER_BOUND_TYPE (type) == BOUND_CANNOT_BE_DETERMINED) |
c906108c SS |
296 | { |
297 | struct type *range_type = TYPE_INDEX_TYPE (type); | |
298 | int val_length = TYPE_LENGTH (type2); | |
299 | LONGEST low_bound, high_bound, new_length; | |
300 | if (get_discrete_bounds (range_type, &low_bound, &high_bound) < 0) | |
301 | low_bound = 0, high_bound = 0; | |
302 | new_length = val_length / element_length; | |
303 | if (val_length % element_length != 0) | |
8a3fe4f8 | 304 | warning (_("array element type size does not divide object size in cast")); |
ac3eeb49 MS |
305 | /* FIXME-type-allocation: need a way to free this type when |
306 | we are done with it. */ | |
c906108c SS |
307 | range_type = create_range_type ((struct type *) NULL, |
308 | TYPE_TARGET_TYPE (range_type), | |
309 | low_bound, | |
310 | new_length + low_bound - 1); | |
ac3eeb49 MS |
311 | deprecated_set_value_type (arg2, |
312 | create_array_type ((struct type *) NULL, | |
313 | element_type, | |
314 | range_type)); | |
c906108c SS |
315 | return arg2; |
316 | } | |
317 | } | |
318 | ||
319 | if (current_language->c_style_arrays | |
320 | && TYPE_CODE (type2) == TYPE_CODE_ARRAY) | |
321 | arg2 = value_coerce_array (arg2); | |
322 | ||
323 | if (TYPE_CODE (type2) == TYPE_CODE_FUNC) | |
324 | arg2 = value_coerce_function (arg2); | |
325 | ||
df407dfe | 326 | type2 = check_typedef (value_type (arg2)); |
c906108c SS |
327 | code2 = TYPE_CODE (type2); |
328 | ||
329 | if (code1 == TYPE_CODE_COMPLEX) | |
330 | return cast_into_complex (type, arg2); | |
331 | if (code1 == TYPE_CODE_BOOL) | |
332 | { | |
333 | code1 = TYPE_CODE_INT; | |
334 | convert_to_boolean = 1; | |
335 | } | |
336 | if (code1 == TYPE_CODE_CHAR) | |
337 | code1 = TYPE_CODE_INT; | |
338 | if (code2 == TYPE_CODE_BOOL || code2 == TYPE_CODE_CHAR) | |
339 | code2 = TYPE_CODE_INT; | |
340 | ||
341 | scalar = (code2 == TYPE_CODE_INT || code2 == TYPE_CODE_FLT | |
4ef30785 TJB |
342 | || code2 == TYPE_CODE_DECFLOAT || code2 == TYPE_CODE_ENUM |
343 | || code2 == TYPE_CODE_RANGE); | |
c906108c | 344 | |
c5aa993b | 345 | if (code1 == TYPE_CODE_STRUCT |
c906108c SS |
346 | && code2 == TYPE_CODE_STRUCT |
347 | && TYPE_NAME (type) != 0) | |
348 | { | |
349 | /* Look in the type of the source to see if it contains the | |
7b83ea04 AC |
350 | type of the target as a superclass. If so, we'll need to |
351 | offset the object in addition to changing its type. */ | |
f23631e4 | 352 | struct value *v = search_struct_field (type_name_no_tag (type), |
ac3eeb49 | 353 | arg2, 0, type2, 1); |
c906108c SS |
354 | if (v) |
355 | { | |
04624583 | 356 | deprecated_set_value_type (v, type); |
c906108c SS |
357 | return v; |
358 | } | |
359 | } | |
360 | if (code1 == TYPE_CODE_FLT && scalar) | |
361 | return value_from_double (type, value_as_double (arg2)); | |
4ef30785 TJB |
362 | else if (code1 == TYPE_CODE_DECFLOAT && scalar) |
363 | { | |
364 | int dec_len = TYPE_LENGTH (type); | |
365 | gdb_byte dec[16]; | |
366 | ||
367 | if (code2 == TYPE_CODE_FLT) | |
368 | decimal_from_floating (arg2, dec, dec_len); | |
369 | else if (code2 == TYPE_CODE_DECFLOAT) | |
370 | decimal_convert (value_contents (arg2), TYPE_LENGTH (type2), | |
371 | dec, dec_len); | |
372 | else | |
373 | /* The only option left is an integral type. */ | |
374 | decimal_from_integral (arg2, dec, dec_len); | |
375 | ||
376 | return value_from_decfloat (type, dec); | |
377 | } | |
c906108c SS |
378 | else if ((code1 == TYPE_CODE_INT || code1 == TYPE_CODE_ENUM |
379 | || code1 == TYPE_CODE_RANGE) | |
0d5de010 DJ |
380 | && (scalar || code2 == TYPE_CODE_PTR |
381 | || code2 == TYPE_CODE_MEMBERPTR)) | |
c906108c SS |
382 | { |
383 | LONGEST longest; | |
c5aa993b | 384 | |
2bf1f4a1 | 385 | /* When we cast pointers to integers, we mustn't use |
76e71323 | 386 | gdbarch_pointer_to_address to find the address the pointer |
2bf1f4a1 JB |
387 | represents, as value_as_long would. GDB should evaluate |
388 | expressions just as the compiler would --- and the compiler | |
389 | sees a cast as a simple reinterpretation of the pointer's | |
390 | bits. */ | |
391 | if (code2 == TYPE_CODE_PTR) | |
0fd88904 | 392 | longest = extract_unsigned_integer (value_contents (arg2), |
2bf1f4a1 JB |
393 | TYPE_LENGTH (type2)); |
394 | else | |
395 | longest = value_as_long (arg2); | |
802db21b | 396 | return value_from_longest (type, convert_to_boolean ? |
716c501e | 397 | (LONGEST) (longest ? 1 : 0) : longest); |
c906108c | 398 | } |
ac3eeb49 MS |
399 | else if (code1 == TYPE_CODE_PTR && (code2 == TYPE_CODE_INT |
400 | || code2 == TYPE_CODE_ENUM | |
401 | || code2 == TYPE_CODE_RANGE)) | |
634acd5f | 402 | { |
4603e466 DT |
403 | /* TYPE_LENGTH (type) is the length of a pointer, but we really |
404 | want the length of an address! -- we are really dealing with | |
405 | addresses (i.e., gdb representations) not pointers (i.e., | |
406 | target representations) here. | |
407 | ||
408 | This allows things like "print *(int *)0x01000234" to work | |
409 | without printing a misleading message -- which would | |
410 | otherwise occur when dealing with a target having two byte | |
411 | pointers and four byte addresses. */ | |
412 | ||
17a912b6 | 413 | int addr_bit = gdbarch_addr_bit (current_gdbarch); |
4603e466 | 414 | |
634acd5f | 415 | LONGEST longest = value_as_long (arg2); |
4603e466 | 416 | if (addr_bit < sizeof (LONGEST) * HOST_CHAR_BIT) |
634acd5f | 417 | { |
4603e466 DT |
418 | if (longest >= ((LONGEST) 1 << addr_bit) |
419 | || longest <= -((LONGEST) 1 << addr_bit)) | |
8a3fe4f8 | 420 | warning (_("value truncated")); |
634acd5f AC |
421 | } |
422 | return value_from_longest (type, longest); | |
423 | } | |
0d5de010 DJ |
424 | else if (code1 == TYPE_CODE_METHODPTR && code2 == TYPE_CODE_INT |
425 | && value_as_long (arg2) == 0) | |
426 | { | |
427 | struct value *result = allocate_value (type); | |
428 | cplus_make_method_ptr (value_contents_writeable (result), 0, 0); | |
429 | return result; | |
430 | } | |
431 | else if (code1 == TYPE_CODE_MEMBERPTR && code2 == TYPE_CODE_INT | |
432 | && value_as_long (arg2) == 0) | |
433 | { | |
434 | /* The Itanium C++ ABI represents NULL pointers to members as | |
435 | minus one, instead of biasing the normal case. */ | |
436 | return value_from_longest (type, -1); | |
437 | } | |
c906108c SS |
438 | else if (TYPE_LENGTH (type) == TYPE_LENGTH (type2)) |
439 | { | |
440 | if (code1 == TYPE_CODE_PTR && code2 == TYPE_CODE_PTR) | |
fb933624 DJ |
441 | return value_cast_pointers (type, arg2); |
442 | ||
0d5de010 | 443 | arg2 = value_copy (arg2); |
04624583 | 444 | deprecated_set_value_type (arg2, type); |
2b127877 | 445 | arg2 = value_change_enclosing_type (arg2, type); |
b44d461b | 446 | set_value_pointed_to_offset (arg2, 0); /* pai: chk_val */ |
c906108c SS |
447 | return arg2; |
448 | } | |
c906108c | 449 | else if (VALUE_LVAL (arg2) == lval_memory) |
ac3eeb49 MS |
450 | return value_at_lazy (type, |
451 | VALUE_ADDRESS (arg2) + value_offset (arg2)); | |
c906108c SS |
452 | else if (code1 == TYPE_CODE_VOID) |
453 | { | |
454 | return value_zero (builtin_type_void, not_lval); | |
455 | } | |
456 | else | |
457 | { | |
8a3fe4f8 | 458 | error (_("Invalid cast.")); |
c906108c SS |
459 | return 0; |
460 | } | |
461 | } | |
462 | ||
463 | /* Create a value of type TYPE that is zero, and return it. */ | |
464 | ||
f23631e4 | 465 | struct value * |
fba45db2 | 466 | value_zero (struct type *type, enum lval_type lv) |
c906108c | 467 | { |
f23631e4 | 468 | struct value *val = allocate_value (type); |
c906108c SS |
469 | VALUE_LVAL (val) = lv; |
470 | ||
471 | return val; | |
472 | } | |
473 | ||
301f0ecf DE |
474 | /* Create a value of numeric type TYPE that is one, and return it. */ |
475 | ||
476 | struct value * | |
477 | value_one (struct type *type, enum lval_type lv) | |
478 | { | |
479 | struct type *type1 = check_typedef (type); | |
480 | struct value *val = NULL; /* avoid -Wall warning */ | |
481 | ||
482 | if (TYPE_CODE (type1) == TYPE_CODE_DECFLOAT) | |
483 | { | |
484 | struct value *int_one = value_from_longest (builtin_type_int, 1); | |
485 | struct value *val; | |
486 | gdb_byte v[16]; | |
487 | ||
488 | decimal_from_integral (int_one, v, TYPE_LENGTH (builtin_type_int)); | |
489 | val = value_from_decfloat (type, v); | |
490 | } | |
491 | else if (TYPE_CODE (type1) == TYPE_CODE_FLT) | |
492 | { | |
493 | val = value_from_double (type, (DOUBLEST) 1); | |
494 | } | |
495 | else if (is_integral_type (type1)) | |
496 | { | |
497 | val = value_from_longest (type, (LONGEST) 1); | |
498 | } | |
499 | else | |
500 | { | |
501 | error (_("Not a numeric type.")); | |
502 | } | |
503 | ||
504 | VALUE_LVAL (val) = lv; | |
505 | return val; | |
506 | } | |
507 | ||
070ad9f0 | 508 | /* Return a value with type TYPE located at ADDR. |
c906108c SS |
509 | |
510 | Call value_at only if the data needs to be fetched immediately; | |
511 | if we can be 'lazy' and defer the fetch, perhaps indefinately, call | |
512 | value_at_lazy instead. value_at_lazy simply records the address of | |
070ad9f0 | 513 | the data and sets the lazy-evaluation-required flag. The lazy flag |
0fd88904 | 514 | is tested in the value_contents macro, which is used if and when |
070ad9f0 | 515 | the contents are actually required. |
c906108c SS |
516 | |
517 | Note: value_at does *NOT* handle embedded offsets; perform such | |
ac3eeb49 | 518 | adjustments before or after calling it. */ |
c906108c | 519 | |
f23631e4 | 520 | struct value * |
00a4c844 | 521 | value_at (struct type *type, CORE_ADDR addr) |
c906108c | 522 | { |
f23631e4 | 523 | struct value *val; |
c906108c SS |
524 | |
525 | if (TYPE_CODE (check_typedef (type)) == TYPE_CODE_VOID) | |
8a3fe4f8 | 526 | error (_("Attempt to dereference a generic pointer.")); |
c906108c SS |
527 | |
528 | val = allocate_value (type); | |
529 | ||
990a07ab | 530 | read_memory (addr, value_contents_all_raw (val), TYPE_LENGTH (type)); |
c906108c SS |
531 | |
532 | VALUE_LVAL (val) = lval_memory; | |
533 | VALUE_ADDRESS (val) = addr; | |
c906108c SS |
534 | |
535 | return val; | |
536 | } | |
537 | ||
538 | /* Return a lazy value with type TYPE located at ADDR (cf. value_at). */ | |
539 | ||
f23631e4 | 540 | struct value * |
00a4c844 | 541 | value_at_lazy (struct type *type, CORE_ADDR addr) |
c906108c | 542 | { |
f23631e4 | 543 | struct value *val; |
c906108c SS |
544 | |
545 | if (TYPE_CODE (check_typedef (type)) == TYPE_CODE_VOID) | |
8a3fe4f8 | 546 | error (_("Attempt to dereference a generic pointer.")); |
c906108c SS |
547 | |
548 | val = allocate_value (type); | |
549 | ||
550 | VALUE_LVAL (val) = lval_memory; | |
551 | VALUE_ADDRESS (val) = addr; | |
dfa52d88 | 552 | set_value_lazy (val, 1); |
c906108c SS |
553 | |
554 | return val; | |
555 | } | |
556 | ||
0fd88904 | 557 | /* Called only from the value_contents and value_contents_all() |
46615f07 | 558 | macros, if the current data for a variable needs to be loaded into |
0fd88904 | 559 | value_contents(VAL). Fetches the data from the user's process, and |
46615f07 AC |
560 | clears the lazy flag to indicate that the data in the buffer is |
561 | valid. | |
c906108c | 562 | |
ac3eeb49 MS |
563 | If the value is zero-length, we avoid calling read_memory, which |
564 | would abort. We mark the value as fetched anyway -- all 0 bytes of | |
565 | it. | |
c906108c | 566 | |
ac3eeb49 MS |
567 | This function returns a value because it is used in the |
568 | value_contents macro as part of an expression, where a void would | |
569 | not work. The value is ignored. */ | |
c906108c SS |
570 | |
571 | int | |
f23631e4 | 572 | value_fetch_lazy (struct value *val) |
c906108c | 573 | { |
df407dfe | 574 | CORE_ADDR addr = VALUE_ADDRESS (val) + value_offset (val); |
4754a64e | 575 | int length = TYPE_LENGTH (value_enclosing_type (val)); |
c906108c | 576 | |
df407dfe | 577 | struct type *type = value_type (val); |
75af7f68 | 578 | if (length) |
990a07ab | 579 | read_memory (addr, value_contents_all_raw (val), length); |
802db21b | 580 | |
dfa52d88 | 581 | set_value_lazy (val, 0); |
c906108c SS |
582 | return 0; |
583 | } | |
584 | ||
585 | ||
586 | /* Store the contents of FROMVAL into the location of TOVAL. | |
587 | Return a new value with the location of TOVAL and contents of FROMVAL. */ | |
588 | ||
f23631e4 AC |
589 | struct value * |
590 | value_assign (struct value *toval, struct value *fromval) | |
c906108c | 591 | { |
52f0bd74 | 592 | struct type *type; |
f23631e4 | 593 | struct value *val; |
cb741690 | 594 | struct frame_id old_frame; |
c906108c | 595 | |
88e3b34b | 596 | if (!deprecated_value_modifiable (toval)) |
8a3fe4f8 | 597 | error (_("Left operand of assignment is not a modifiable lvalue.")); |
c906108c | 598 | |
994b9211 | 599 | toval = coerce_ref (toval); |
c906108c | 600 | |
df407dfe | 601 | type = value_type (toval); |
c906108c | 602 | if (VALUE_LVAL (toval) != lval_internalvar) |
63092375 DJ |
603 | { |
604 | toval = value_coerce_to_target (toval); | |
605 | fromval = value_cast (type, fromval); | |
606 | } | |
c906108c | 607 | else |
63092375 DJ |
608 | { |
609 | /* Coerce arrays and functions to pointers, except for arrays | |
610 | which only live in GDB's storage. */ | |
611 | if (!value_must_coerce_to_target (fromval)) | |
612 | fromval = coerce_array (fromval); | |
613 | } | |
614 | ||
c906108c SS |
615 | CHECK_TYPEDEF (type); |
616 | ||
ac3eeb49 MS |
617 | /* Since modifying a register can trash the frame chain, and |
618 | modifying memory can trash the frame cache, we save the old frame | |
619 | and then restore the new frame afterwards. */ | |
206415a3 | 620 | old_frame = get_frame_id (deprecated_safe_get_selected_frame ()); |
cb741690 | 621 | |
c906108c SS |
622 | switch (VALUE_LVAL (toval)) |
623 | { | |
624 | case lval_internalvar: | |
625 | set_internalvar (VALUE_INTERNALVAR (toval), fromval); | |
626 | val = value_copy (VALUE_INTERNALVAR (toval)->value); | |
ac3eeb49 MS |
627 | val = value_change_enclosing_type (val, |
628 | value_enclosing_type (fromval)); | |
13c3b5f5 | 629 | set_value_embedded_offset (val, value_embedded_offset (fromval)); |
ac3eeb49 MS |
630 | set_value_pointed_to_offset (val, |
631 | value_pointed_to_offset (fromval)); | |
c906108c SS |
632 | return val; |
633 | ||
634 | case lval_internalvar_component: | |
635 | set_internalvar_component (VALUE_INTERNALVAR (toval), | |
df407dfe AC |
636 | value_offset (toval), |
637 | value_bitpos (toval), | |
638 | value_bitsize (toval), | |
c906108c SS |
639 | fromval); |
640 | break; | |
641 | ||
642 | case lval_memory: | |
643 | { | |
fc1a4b47 | 644 | const gdb_byte *dest_buffer; |
c5aa993b JM |
645 | CORE_ADDR changed_addr; |
646 | int changed_len; | |
10c42a71 | 647 | gdb_byte buffer[sizeof (LONGEST)]; |
c906108c | 648 | |
df407dfe | 649 | if (value_bitsize (toval)) |
c5aa993b | 650 | { |
ac3eeb49 MS |
651 | /* We assume that the argument to read_memory is in units |
652 | of host chars. FIXME: Is that correct? */ | |
df407dfe AC |
653 | changed_len = (value_bitpos (toval) |
654 | + value_bitsize (toval) | |
c5aa993b JM |
655 | + HOST_CHAR_BIT - 1) |
656 | / HOST_CHAR_BIT; | |
c906108c SS |
657 | |
658 | if (changed_len > (int) sizeof (LONGEST)) | |
8a3fe4f8 | 659 | error (_("Can't handle bitfields which don't fit in a %d bit word."), |
baa6f10b | 660 | (int) sizeof (LONGEST) * HOST_CHAR_BIT); |
c906108c | 661 | |
df407dfe | 662 | read_memory (VALUE_ADDRESS (toval) + value_offset (toval), |
c906108c SS |
663 | buffer, changed_len); |
664 | modify_field (buffer, value_as_long (fromval), | |
df407dfe AC |
665 | value_bitpos (toval), value_bitsize (toval)); |
666 | changed_addr = VALUE_ADDRESS (toval) + value_offset (toval); | |
c906108c SS |
667 | dest_buffer = buffer; |
668 | } | |
c906108c SS |
669 | else |
670 | { | |
df407dfe | 671 | changed_addr = VALUE_ADDRESS (toval) + value_offset (toval); |
c906108c | 672 | changed_len = TYPE_LENGTH (type); |
0fd88904 | 673 | dest_buffer = value_contents (fromval); |
c906108c SS |
674 | } |
675 | ||
676 | write_memory (changed_addr, dest_buffer, changed_len); | |
9a4105ab AC |
677 | if (deprecated_memory_changed_hook) |
678 | deprecated_memory_changed_hook (changed_addr, changed_len); | |
c906108c SS |
679 | } |
680 | break; | |
681 | ||
492254e9 | 682 | case lval_register: |
c906108c | 683 | { |
c906108c | 684 | struct frame_info *frame; |
ff2e87ac | 685 | int value_reg; |
c906108c SS |
686 | |
687 | /* Figure out which frame this is in currently. */ | |
0c16dd26 AC |
688 | frame = frame_find_by_id (VALUE_FRAME_ID (toval)); |
689 | value_reg = VALUE_REGNUM (toval); | |
c906108c SS |
690 | |
691 | if (!frame) | |
8a3fe4f8 | 692 | error (_("Value being assigned to is no longer active.")); |
492254e9 | 693 | |
c1afe53d UW |
694 | if (gdbarch_convert_register_p |
695 | (current_gdbarch, VALUE_REGNUM (toval), type)) | |
492254e9 | 696 | { |
ff2e87ac | 697 | /* If TOVAL is a special machine register requiring |
ac3eeb49 MS |
698 | conversion of program values to a special raw |
699 | format. */ | |
700 | gdbarch_value_to_register (current_gdbarch, frame, | |
701 | VALUE_REGNUM (toval), type, | |
702 | value_contents (fromval)); | |
492254e9 | 703 | } |
c906108c | 704 | else |
492254e9 | 705 | { |
df407dfe | 706 | if (value_bitsize (toval)) |
00fa51f6 UW |
707 | { |
708 | int changed_len; | |
709 | gdb_byte buffer[sizeof (LONGEST)]; | |
710 | ||
711 | changed_len = (value_bitpos (toval) | |
712 | + value_bitsize (toval) | |
713 | + HOST_CHAR_BIT - 1) | |
714 | / HOST_CHAR_BIT; | |
715 | ||
716 | if (changed_len > (int) sizeof (LONGEST)) | |
717 | error (_("Can't handle bitfields which don't fit in a %d bit word."), | |
718 | (int) sizeof (LONGEST) * HOST_CHAR_BIT); | |
719 | ||
720 | get_frame_register_bytes (frame, value_reg, | |
721 | value_offset (toval), | |
722 | changed_len, buffer); | |
723 | ||
724 | modify_field (buffer, value_as_long (fromval), | |
ac3eeb49 MS |
725 | value_bitpos (toval), |
726 | value_bitsize (toval)); | |
00fa51f6 UW |
727 | |
728 | put_frame_register_bytes (frame, value_reg, | |
729 | value_offset (toval), | |
730 | changed_len, buffer); | |
731 | } | |
c906108c | 732 | else |
00fa51f6 UW |
733 | { |
734 | put_frame_register_bytes (frame, value_reg, | |
735 | value_offset (toval), | |
736 | TYPE_LENGTH (type), | |
737 | value_contents (fromval)); | |
738 | } | |
ff2e87ac | 739 | } |
00fa51f6 | 740 | |
9a4105ab AC |
741 | if (deprecated_register_changed_hook) |
742 | deprecated_register_changed_hook (-1); | |
f4c5303c | 743 | observer_notify_target_changed (¤t_target); |
ff2e87ac | 744 | break; |
c906108c | 745 | } |
492254e9 | 746 | |
c906108c | 747 | default: |
8a3fe4f8 | 748 | error (_("Left operand of assignment is not an lvalue.")); |
c906108c SS |
749 | } |
750 | ||
cb741690 DJ |
751 | /* Assigning to the stack pointer, frame pointer, and other |
752 | (architecture and calling convention specific) registers may | |
753 | cause the frame cache to be out of date. Assigning to memory | |
754 | also can. We just do this on all assignments to registers or | |
755 | memory, for simplicity's sake; I doubt the slowdown matters. */ | |
756 | switch (VALUE_LVAL (toval)) | |
757 | { | |
758 | case lval_memory: | |
759 | case lval_register: | |
cb741690 DJ |
760 | |
761 | reinit_frame_cache (); | |
762 | ||
ac3eeb49 MS |
763 | /* Having destroyed the frame cache, restore the selected |
764 | frame. */ | |
cb741690 DJ |
765 | |
766 | /* FIXME: cagney/2002-11-02: There has to be a better way of | |
767 | doing this. Instead of constantly saving/restoring the | |
768 | frame. Why not create a get_selected_frame() function that, | |
769 | having saved the selected frame's ID can automatically | |
770 | re-find the previously selected frame automatically. */ | |
771 | ||
772 | { | |
773 | struct frame_info *fi = frame_find_by_id (old_frame); | |
774 | if (fi != NULL) | |
775 | select_frame (fi); | |
776 | } | |
777 | ||
778 | break; | |
779 | default: | |
780 | break; | |
781 | } | |
782 | ||
ac3eeb49 MS |
783 | /* If the field does not entirely fill a LONGEST, then zero the sign |
784 | bits. If the field is signed, and is negative, then sign | |
785 | extend. */ | |
df407dfe AC |
786 | if ((value_bitsize (toval) > 0) |
787 | && (value_bitsize (toval) < 8 * (int) sizeof (LONGEST))) | |
c906108c SS |
788 | { |
789 | LONGEST fieldval = value_as_long (fromval); | |
df407dfe | 790 | LONGEST valmask = (((ULONGEST) 1) << value_bitsize (toval)) - 1; |
c906108c SS |
791 | |
792 | fieldval &= valmask; | |
ac3eeb49 MS |
793 | if (!TYPE_UNSIGNED (type) |
794 | && (fieldval & (valmask ^ (valmask >> 1)))) | |
c906108c SS |
795 | fieldval |= ~valmask; |
796 | ||
797 | fromval = value_from_longest (type, fieldval); | |
798 | } | |
799 | ||
800 | val = value_copy (toval); | |
0fd88904 | 801 | memcpy (value_contents_raw (val), value_contents (fromval), |
c906108c | 802 | TYPE_LENGTH (type)); |
04624583 | 803 | deprecated_set_value_type (val, type); |
ac3eeb49 MS |
804 | val = value_change_enclosing_type (val, |
805 | value_enclosing_type (fromval)); | |
13c3b5f5 | 806 | set_value_embedded_offset (val, value_embedded_offset (fromval)); |
b44d461b | 807 | set_value_pointed_to_offset (val, value_pointed_to_offset (fromval)); |
c5aa993b | 808 | |
c906108c SS |
809 | return val; |
810 | } | |
811 | ||
812 | /* Extend a value VAL to COUNT repetitions of its type. */ | |
813 | ||
f23631e4 AC |
814 | struct value * |
815 | value_repeat (struct value *arg1, int count) | |
c906108c | 816 | { |
f23631e4 | 817 | struct value *val; |
c906108c SS |
818 | |
819 | if (VALUE_LVAL (arg1) != lval_memory) | |
8a3fe4f8 | 820 | error (_("Only values in memory can be extended with '@'.")); |
c906108c | 821 | if (count < 1) |
8a3fe4f8 | 822 | error (_("Invalid number %d of repetitions."), count); |
c906108c | 823 | |
4754a64e | 824 | val = allocate_repeat_value (value_enclosing_type (arg1), count); |
c906108c | 825 | |
df407dfe | 826 | read_memory (VALUE_ADDRESS (arg1) + value_offset (arg1), |
990a07ab | 827 | value_contents_all_raw (val), |
4754a64e | 828 | TYPE_LENGTH (value_enclosing_type (val))); |
c906108c | 829 | VALUE_LVAL (val) = lval_memory; |
df407dfe | 830 | VALUE_ADDRESS (val) = VALUE_ADDRESS (arg1) + value_offset (arg1); |
c906108c SS |
831 | |
832 | return val; | |
833 | } | |
834 | ||
f23631e4 | 835 | struct value * |
fba45db2 | 836 | value_of_variable (struct symbol *var, struct block *b) |
c906108c | 837 | { |
f23631e4 | 838 | struct value *val; |
c906108c SS |
839 | struct frame_info *frame = NULL; |
840 | ||
841 | if (!b) | |
842 | frame = NULL; /* Use selected frame. */ | |
843 | else if (symbol_read_needs_frame (var)) | |
844 | { | |
845 | frame = block_innermost_frame (b); | |
846 | if (!frame) | |
c5aa993b | 847 | { |
c906108c | 848 | if (BLOCK_FUNCTION (b) |
de5ad195 | 849 | && SYMBOL_PRINT_NAME (BLOCK_FUNCTION (b))) |
8a3fe4f8 | 850 | error (_("No frame is currently executing in block %s."), |
de5ad195 | 851 | SYMBOL_PRINT_NAME (BLOCK_FUNCTION (b))); |
c906108c | 852 | else |
8a3fe4f8 | 853 | error (_("No frame is currently executing in specified block")); |
c5aa993b | 854 | } |
c906108c SS |
855 | } |
856 | ||
857 | val = read_var_value (var, frame); | |
858 | if (!val) | |
8a3fe4f8 | 859 | error (_("Address of symbol \"%s\" is unknown."), SYMBOL_PRINT_NAME (var)); |
c906108c SS |
860 | |
861 | return val; | |
862 | } | |
863 | ||
63092375 DJ |
864 | /* Return one if VAL does not live in target memory, but should in order |
865 | to operate on it. Otherwise return zero. */ | |
866 | ||
867 | int | |
868 | value_must_coerce_to_target (struct value *val) | |
869 | { | |
870 | struct type *valtype; | |
871 | ||
872 | /* The only lval kinds which do not live in target memory. */ | |
873 | if (VALUE_LVAL (val) != not_lval | |
874 | && VALUE_LVAL (val) != lval_internalvar) | |
875 | return 0; | |
876 | ||
877 | valtype = check_typedef (value_type (val)); | |
878 | ||
879 | switch (TYPE_CODE (valtype)) | |
880 | { | |
881 | case TYPE_CODE_ARRAY: | |
882 | case TYPE_CODE_STRING: | |
883 | return 1; | |
884 | default: | |
885 | return 0; | |
886 | } | |
887 | } | |
888 | ||
889 | /* Make sure that VAL lives in target memory if it's supposed to. For instance, | |
890 | strings are constructed as character arrays in GDB's storage, and this | |
891 | function copies them to the target. */ | |
892 | ||
893 | struct value * | |
894 | value_coerce_to_target (struct value *val) | |
895 | { | |
896 | LONGEST length; | |
897 | CORE_ADDR addr; | |
898 | ||
899 | if (!value_must_coerce_to_target (val)) | |
900 | return val; | |
901 | ||
902 | length = TYPE_LENGTH (check_typedef (value_type (val))); | |
903 | addr = allocate_space_in_inferior (length); | |
904 | write_memory (addr, value_contents (val), length); | |
905 | return value_at_lazy (value_type (val), addr); | |
906 | } | |
907 | ||
ac3eeb49 MS |
908 | /* Given a value which is an array, return a value which is a pointer |
909 | to its first element, regardless of whether or not the array has a | |
910 | nonzero lower bound. | |
c906108c | 911 | |
ac3eeb49 MS |
912 | FIXME: A previous comment here indicated that this routine should |
913 | be substracting the array's lower bound. It's not clear to me that | |
914 | this is correct. Given an array subscripting operation, it would | |
915 | certainly work to do the adjustment here, essentially computing: | |
c906108c SS |
916 | |
917 | (&array[0] - (lowerbound * sizeof array[0])) + (index * sizeof array[0]) | |
918 | ||
ac3eeb49 MS |
919 | However I believe a more appropriate and logical place to account |
920 | for the lower bound is to do so in value_subscript, essentially | |
921 | computing: | |
c906108c SS |
922 | |
923 | (&array[0] + ((index - lowerbound) * sizeof array[0])) | |
924 | ||
ac3eeb49 MS |
925 | As further evidence consider what would happen with operations |
926 | other than array subscripting, where the caller would get back a | |
927 | value that had an address somewhere before the actual first element | |
928 | of the array, and the information about the lower bound would be | |
929 | lost because of the coercion to pointer type. | |
c5aa993b | 930 | */ |
c906108c | 931 | |
f23631e4 AC |
932 | struct value * |
933 | value_coerce_array (struct value *arg1) | |
c906108c | 934 | { |
df407dfe | 935 | struct type *type = check_typedef (value_type (arg1)); |
c906108c | 936 | |
63092375 DJ |
937 | /* If the user tries to do something requiring a pointer with an |
938 | array that has not yet been pushed to the target, then this would | |
939 | be a good time to do so. */ | |
940 | arg1 = value_coerce_to_target (arg1); | |
941 | ||
c906108c | 942 | if (VALUE_LVAL (arg1) != lval_memory) |
8a3fe4f8 | 943 | error (_("Attempt to take address of value not located in memory.")); |
c906108c | 944 | |
4478b372 | 945 | return value_from_pointer (lookup_pointer_type (TYPE_TARGET_TYPE (type)), |
df407dfe | 946 | (VALUE_ADDRESS (arg1) + value_offset (arg1))); |
c906108c SS |
947 | } |
948 | ||
949 | /* Given a value which is a function, return a value which is a pointer | |
950 | to it. */ | |
951 | ||
f23631e4 AC |
952 | struct value * |
953 | value_coerce_function (struct value *arg1) | |
c906108c | 954 | { |
f23631e4 | 955 | struct value *retval; |
c906108c SS |
956 | |
957 | if (VALUE_LVAL (arg1) != lval_memory) | |
8a3fe4f8 | 958 | error (_("Attempt to take address of value not located in memory.")); |
c906108c | 959 | |
df407dfe AC |
960 | retval = value_from_pointer (lookup_pointer_type (value_type (arg1)), |
961 | (VALUE_ADDRESS (arg1) + value_offset (arg1))); | |
c906108c | 962 | return retval; |
c5aa993b | 963 | } |
c906108c | 964 | |
ac3eeb49 MS |
965 | /* Return a pointer value for the object for which ARG1 is the |
966 | contents. */ | |
c906108c | 967 | |
f23631e4 AC |
968 | struct value * |
969 | value_addr (struct value *arg1) | |
c906108c | 970 | { |
f23631e4 | 971 | struct value *arg2; |
c906108c | 972 | |
df407dfe | 973 | struct type *type = check_typedef (value_type (arg1)); |
c906108c SS |
974 | if (TYPE_CODE (type) == TYPE_CODE_REF) |
975 | { | |
ac3eeb49 MS |
976 | /* Copy the value, but change the type from (T&) to (T*). We |
977 | keep the same location information, which is efficient, and | |
978 | allows &(&X) to get the location containing the reference. */ | |
c906108c | 979 | arg2 = value_copy (arg1); |
ac3eeb49 MS |
980 | deprecated_set_value_type (arg2, |
981 | lookup_pointer_type (TYPE_TARGET_TYPE (type))); | |
c906108c SS |
982 | return arg2; |
983 | } | |
984 | if (TYPE_CODE (type) == TYPE_CODE_FUNC) | |
985 | return value_coerce_function (arg1); | |
986 | ||
63092375 DJ |
987 | /* If this is an array that has not yet been pushed to the target, |
988 | then this would be a good time to force it to memory. */ | |
989 | arg1 = value_coerce_to_target (arg1); | |
990 | ||
c906108c | 991 | if (VALUE_LVAL (arg1) != lval_memory) |
8a3fe4f8 | 992 | error (_("Attempt to take address of value not located in memory.")); |
c906108c | 993 | |
c5aa993b | 994 | /* Get target memory address */ |
df407dfe | 995 | arg2 = value_from_pointer (lookup_pointer_type (value_type (arg1)), |
4478b372 | 996 | (VALUE_ADDRESS (arg1) |
df407dfe | 997 | + value_offset (arg1) |
13c3b5f5 | 998 | + value_embedded_offset (arg1))); |
c906108c SS |
999 | |
1000 | /* This may be a pointer to a base subobject; so remember the | |
ac3eeb49 | 1001 | full derived object's type ... */ |
4754a64e | 1002 | arg2 = value_change_enclosing_type (arg2, lookup_pointer_type (value_enclosing_type (arg1))); |
ac3eeb49 MS |
1003 | /* ... and also the relative position of the subobject in the full |
1004 | object. */ | |
b44d461b | 1005 | set_value_pointed_to_offset (arg2, value_embedded_offset (arg1)); |
c906108c SS |
1006 | return arg2; |
1007 | } | |
1008 | ||
ac3eeb49 MS |
1009 | /* Return a reference value for the object for which ARG1 is the |
1010 | contents. */ | |
fb933624 DJ |
1011 | |
1012 | struct value * | |
1013 | value_ref (struct value *arg1) | |
1014 | { | |
1015 | struct value *arg2; | |
1016 | ||
1017 | struct type *type = check_typedef (value_type (arg1)); | |
1018 | if (TYPE_CODE (type) == TYPE_CODE_REF) | |
1019 | return arg1; | |
1020 | ||
1021 | arg2 = value_addr (arg1); | |
1022 | deprecated_set_value_type (arg2, lookup_reference_type (type)); | |
1023 | return arg2; | |
1024 | } | |
1025 | ||
ac3eeb49 MS |
1026 | /* Given a value of a pointer type, apply the C unary * operator to |
1027 | it. */ | |
c906108c | 1028 | |
f23631e4 AC |
1029 | struct value * |
1030 | value_ind (struct value *arg1) | |
c906108c SS |
1031 | { |
1032 | struct type *base_type; | |
f23631e4 | 1033 | struct value *arg2; |
c906108c | 1034 | |
994b9211 | 1035 | arg1 = coerce_array (arg1); |
c906108c | 1036 | |
df407dfe | 1037 | base_type = check_typedef (value_type (arg1)); |
c906108c | 1038 | |
c906108c | 1039 | /* Allow * on an integer so we can cast it to whatever we want. |
ac3eeb49 MS |
1040 | This returns an int, which seems like the most C-like thing to |
1041 | do. "long long" variables are rare enough that | |
c906108c SS |
1042 | BUILTIN_TYPE_LONGEST would seem to be a mistake. */ |
1043 | if (TYPE_CODE (base_type) == TYPE_CODE_INT) | |
56468235 | 1044 | return value_at_lazy (builtin_type_int, |
fef862e5 | 1045 | (CORE_ADDR) value_as_address (arg1)); |
c906108c SS |
1046 | else if (TYPE_CODE (base_type) == TYPE_CODE_PTR) |
1047 | { | |
1048 | struct type *enc_type; | |
ac3eeb49 MS |
1049 | /* We may be pointing to something embedded in a larger object. |
1050 | Get the real type of the enclosing object. */ | |
4754a64e | 1051 | enc_type = check_typedef (value_enclosing_type (arg1)); |
c906108c | 1052 | enc_type = TYPE_TARGET_TYPE (enc_type); |
0d5de010 DJ |
1053 | |
1054 | if (TYPE_CODE (check_typedef (enc_type)) == TYPE_CODE_FUNC | |
1055 | || TYPE_CODE (check_typedef (enc_type)) == TYPE_CODE_METHOD) | |
1056 | /* For functions, go through find_function_addr, which knows | |
1057 | how to handle function descriptors. */ | |
ac3eeb49 MS |
1058 | arg2 = value_at_lazy (enc_type, |
1059 | find_function_addr (arg1, NULL)); | |
0d5de010 DJ |
1060 | else |
1061 | /* Retrieve the enclosing object pointed to */ | |
ac3eeb49 MS |
1062 | arg2 = value_at_lazy (enc_type, |
1063 | (value_as_address (arg1) | |
1064 | - value_pointed_to_offset (arg1))); | |
0d5de010 | 1065 | |
ac3eeb49 | 1066 | /* Re-adjust type. */ |
04624583 | 1067 | deprecated_set_value_type (arg2, TYPE_TARGET_TYPE (base_type)); |
ac3eeb49 | 1068 | /* Add embedding info. */ |
2b127877 | 1069 | arg2 = value_change_enclosing_type (arg2, enc_type); |
b44d461b | 1070 | set_value_embedded_offset (arg2, value_pointed_to_offset (arg1)); |
c906108c | 1071 | |
ac3eeb49 | 1072 | /* We may be pointing to an object of some derived type. */ |
c906108c SS |
1073 | arg2 = value_full_object (arg2, NULL, 0, 0, 0); |
1074 | return arg2; | |
1075 | } | |
1076 | ||
8a3fe4f8 | 1077 | error (_("Attempt to take contents of a non-pointer value.")); |
ac3eeb49 | 1078 | return 0; /* For lint -- never reached. */ |
c906108c SS |
1079 | } |
1080 | \f | |
63092375 | 1081 | /* Create a value for an array by allocating space in GDB, copying |
ac3eeb49 MS |
1082 | copying the data into that space, and then setting up an array |
1083 | value. | |
c906108c | 1084 | |
ac3eeb49 MS |
1085 | The array bounds are set from LOWBOUND and HIGHBOUND, and the array |
1086 | is populated from the values passed in ELEMVEC. | |
c906108c SS |
1087 | |
1088 | The element type of the array is inherited from the type of the | |
1089 | first element, and all elements must have the same size (though we | |
ac3eeb49 | 1090 | don't currently enforce any restriction on their types). */ |
c906108c | 1091 | |
f23631e4 AC |
1092 | struct value * |
1093 | value_array (int lowbound, int highbound, struct value **elemvec) | |
c906108c SS |
1094 | { |
1095 | int nelem; | |
1096 | int idx; | |
1097 | unsigned int typelength; | |
f23631e4 | 1098 | struct value *val; |
c906108c SS |
1099 | struct type *rangetype; |
1100 | struct type *arraytype; | |
1101 | CORE_ADDR addr; | |
1102 | ||
ac3eeb49 MS |
1103 | /* Validate that the bounds are reasonable and that each of the |
1104 | elements have the same size. */ | |
c906108c SS |
1105 | |
1106 | nelem = highbound - lowbound + 1; | |
1107 | if (nelem <= 0) | |
1108 | { | |
8a3fe4f8 | 1109 | error (_("bad array bounds (%d, %d)"), lowbound, highbound); |
c906108c | 1110 | } |
4754a64e | 1111 | typelength = TYPE_LENGTH (value_enclosing_type (elemvec[0])); |
c906108c SS |
1112 | for (idx = 1; idx < nelem; idx++) |
1113 | { | |
4754a64e | 1114 | if (TYPE_LENGTH (value_enclosing_type (elemvec[idx])) != typelength) |
c906108c | 1115 | { |
8a3fe4f8 | 1116 | error (_("array elements must all be the same size")); |
c906108c SS |
1117 | } |
1118 | } | |
1119 | ||
ac3eeb49 MS |
1120 | rangetype = create_range_type ((struct type *) NULL, |
1121 | builtin_type_int, | |
c906108c | 1122 | lowbound, highbound); |
c5aa993b | 1123 | arraytype = create_array_type ((struct type *) NULL, |
ac3eeb49 MS |
1124 | value_enclosing_type (elemvec[0]), |
1125 | rangetype); | |
c906108c SS |
1126 | |
1127 | if (!current_language->c_style_arrays) | |
1128 | { | |
1129 | val = allocate_value (arraytype); | |
1130 | for (idx = 0; idx < nelem; idx++) | |
1131 | { | |
990a07ab | 1132 | memcpy (value_contents_all_raw (val) + (idx * typelength), |
46615f07 | 1133 | value_contents_all (elemvec[idx]), |
c906108c SS |
1134 | typelength); |
1135 | } | |
c906108c SS |
1136 | return val; |
1137 | } | |
1138 | ||
63092375 DJ |
1139 | /* Allocate space to store the array, and then initialize it by |
1140 | copying in each element. */ | |
c906108c | 1141 | |
63092375 | 1142 | val = allocate_value (arraytype); |
c906108c | 1143 | for (idx = 0; idx < nelem; idx++) |
63092375 DJ |
1144 | memcpy (value_contents_writeable (val) + (idx * typelength), |
1145 | value_contents_all (elemvec[idx]), | |
1146 | typelength); | |
1147 | return val; | |
c906108c SS |
1148 | } |
1149 | ||
ac3eeb49 MS |
1150 | /* Create a value for a string constant by allocating space in the |
1151 | inferior, copying the data into that space, and returning the | |
1152 | address with type TYPE_CODE_STRING. PTR points to the string | |
1153 | constant data; LEN is number of characters. | |
1154 | ||
1155 | Note that string types are like array of char types with a lower | |
1156 | bound of zero and an upper bound of LEN - 1. Also note that the | |
1157 | string may contain embedded null bytes. */ | |
c906108c | 1158 | |
f23631e4 | 1159 | struct value * |
fba45db2 | 1160 | value_string (char *ptr, int len) |
c906108c | 1161 | { |
f23631e4 | 1162 | struct value *val; |
c906108c SS |
1163 | int lowbound = current_language->string_lower_bound; |
1164 | struct type *rangetype = create_range_type ((struct type *) NULL, | |
1165 | builtin_type_int, | |
ac3eeb49 MS |
1166 | lowbound, |
1167 | len + lowbound - 1); | |
c906108c | 1168 | struct type *stringtype |
ac3eeb49 | 1169 | = create_string_type ((struct type *) NULL, rangetype); |
c906108c SS |
1170 | CORE_ADDR addr; |
1171 | ||
1172 | if (current_language->c_style_arrays == 0) | |
1173 | { | |
1174 | val = allocate_value (stringtype); | |
990a07ab | 1175 | memcpy (value_contents_raw (val), ptr, len); |
c906108c SS |
1176 | return val; |
1177 | } | |
1178 | ||
1179 | ||
ac3eeb49 MS |
1180 | /* Allocate space to store the string in the inferior, and then copy |
1181 | LEN bytes from PTR in gdb to that address in the inferior. */ | |
c906108c SS |
1182 | |
1183 | addr = allocate_space_in_inferior (len); | |
47b667de | 1184 | write_memory (addr, (gdb_byte *) ptr, len); |
c906108c | 1185 | |
00a4c844 | 1186 | val = value_at_lazy (stringtype, addr); |
c906108c SS |
1187 | return (val); |
1188 | } | |
1189 | ||
f23631e4 | 1190 | struct value * |
fba45db2 | 1191 | value_bitstring (char *ptr, int len) |
c906108c | 1192 | { |
f23631e4 | 1193 | struct value *val; |
ac3eeb49 MS |
1194 | struct type *domain_type = create_range_type (NULL, |
1195 | builtin_type_int, | |
c906108c | 1196 | 0, len - 1); |
ac3eeb49 MS |
1197 | struct type *type = create_set_type ((struct type *) NULL, |
1198 | domain_type); | |
c906108c SS |
1199 | TYPE_CODE (type) = TYPE_CODE_BITSTRING; |
1200 | val = allocate_value (type); | |
990a07ab | 1201 | memcpy (value_contents_raw (val), ptr, TYPE_LENGTH (type)); |
c906108c SS |
1202 | return val; |
1203 | } | |
1204 | \f | |
ac3eeb49 MS |
1205 | /* See if we can pass arguments in T2 to a function which takes |
1206 | arguments of types T1. T1 is a list of NARGS arguments, and T2 is | |
1207 | a NULL-terminated vector. If some arguments need coercion of some | |
1208 | sort, then the coerced values are written into T2. Return value is | |
1209 | 0 if the arguments could be matched, or the position at which they | |
1210 | differ if not. | |
c906108c | 1211 | |
ac3eeb49 MS |
1212 | STATICP is nonzero if the T1 argument list came from a static |
1213 | member function. T2 will still include the ``this'' pointer, but | |
1214 | it will be skipped. | |
c906108c SS |
1215 | |
1216 | For non-static member functions, we ignore the first argument, | |
ac3eeb49 MS |
1217 | which is the type of the instance variable. This is because we |
1218 | want to handle calls with objects from derived classes. This is | |
1219 | not entirely correct: we should actually check to make sure that a | |
c906108c SS |
1220 | requested operation is type secure, shouldn't we? FIXME. */ |
1221 | ||
1222 | static int | |
ad2f7632 DJ |
1223 | typecmp (int staticp, int varargs, int nargs, |
1224 | struct field t1[], struct value *t2[]) | |
c906108c SS |
1225 | { |
1226 | int i; | |
1227 | ||
1228 | if (t2 == 0) | |
ac3eeb49 MS |
1229 | internal_error (__FILE__, __LINE__, |
1230 | _("typecmp: no argument list")); | |
ad2f7632 | 1231 | |
ac3eeb49 MS |
1232 | /* Skip ``this'' argument if applicable. T2 will always include |
1233 | THIS. */ | |
4a1970e4 | 1234 | if (staticp) |
ad2f7632 DJ |
1235 | t2 ++; |
1236 | ||
1237 | for (i = 0; | |
1238 | (i < nargs) && TYPE_CODE (t1[i].type) != TYPE_CODE_VOID; | |
1239 | i++) | |
c906108c | 1240 | { |
c5aa993b | 1241 | struct type *tt1, *tt2; |
ad2f7632 | 1242 | |
c5aa993b JM |
1243 | if (!t2[i]) |
1244 | return i + 1; | |
ad2f7632 DJ |
1245 | |
1246 | tt1 = check_typedef (t1[i].type); | |
df407dfe | 1247 | tt2 = check_typedef (value_type (t2[i])); |
ad2f7632 | 1248 | |
c906108c | 1249 | if (TYPE_CODE (tt1) == TYPE_CODE_REF |
c5aa993b | 1250 | /* We should be doing hairy argument matching, as below. */ |
c906108c SS |
1251 | && (TYPE_CODE (check_typedef (TYPE_TARGET_TYPE (tt1))) == TYPE_CODE (tt2))) |
1252 | { | |
1253 | if (TYPE_CODE (tt2) == TYPE_CODE_ARRAY) | |
1254 | t2[i] = value_coerce_array (t2[i]); | |
1255 | else | |
fb933624 | 1256 | t2[i] = value_ref (t2[i]); |
c906108c SS |
1257 | continue; |
1258 | } | |
1259 | ||
802db21b DB |
1260 | /* djb - 20000715 - Until the new type structure is in the |
1261 | place, and we can attempt things like implicit conversions, | |
1262 | we need to do this so you can take something like a map<const | |
1263 | char *>, and properly access map["hello"], because the | |
1264 | argument to [] will be a reference to a pointer to a char, | |
ac3eeb49 MS |
1265 | and the argument will be a pointer to a char. */ |
1266 | while (TYPE_CODE(tt1) == TYPE_CODE_REF | |
1267 | || TYPE_CODE (tt1) == TYPE_CODE_PTR) | |
802db21b DB |
1268 | { |
1269 | tt1 = check_typedef( TYPE_TARGET_TYPE(tt1) ); | |
1270 | } | |
ac3eeb49 MS |
1271 | while (TYPE_CODE(tt2) == TYPE_CODE_ARRAY |
1272 | || TYPE_CODE(tt2) == TYPE_CODE_PTR | |
1273 | || TYPE_CODE(tt2) == TYPE_CODE_REF) | |
c906108c | 1274 | { |
ac3eeb49 | 1275 | tt2 = check_typedef (TYPE_TARGET_TYPE(tt2)); |
c906108c | 1276 | } |
c5aa993b JM |
1277 | if (TYPE_CODE (tt1) == TYPE_CODE (tt2)) |
1278 | continue; | |
ac3eeb49 MS |
1279 | /* Array to pointer is a `trivial conversion' according to the |
1280 | ARM. */ | |
c906108c | 1281 | |
ac3eeb49 MS |
1282 | /* We should be doing much hairier argument matching (see |
1283 | section 13.2 of the ARM), but as a quick kludge, just check | |
1284 | for the same type code. */ | |
df407dfe | 1285 | if (TYPE_CODE (t1[i].type) != TYPE_CODE (value_type (t2[i]))) |
c5aa993b | 1286 | return i + 1; |
c906108c | 1287 | } |
ad2f7632 | 1288 | if (varargs || t2[i] == NULL) |
c5aa993b | 1289 | return 0; |
ad2f7632 | 1290 | return i + 1; |
c906108c SS |
1291 | } |
1292 | ||
ac3eeb49 MS |
1293 | /* Helper function used by value_struct_elt to recurse through |
1294 | baseclasses. Look for a field NAME in ARG1. Adjust the address of | |
1295 | ARG1 by OFFSET bytes, and search in it assuming it has (class) type | |
1296 | TYPE. If found, return value, else return NULL. | |
c906108c | 1297 | |
ac3eeb49 MS |
1298 | If LOOKING_FOR_BASECLASS, then instead of looking for struct |
1299 | fields, look for a baseclass named NAME. */ | |
c906108c | 1300 | |
f23631e4 AC |
1301 | static struct value * |
1302 | search_struct_field (char *name, struct value *arg1, int offset, | |
aa1ee363 | 1303 | struct type *type, int looking_for_baseclass) |
c906108c SS |
1304 | { |
1305 | int i; | |
1306 | int nbases = TYPE_N_BASECLASSES (type); | |
1307 | ||
1308 | CHECK_TYPEDEF (type); | |
1309 | ||
c5aa993b | 1310 | if (!looking_for_baseclass) |
c906108c SS |
1311 | for (i = TYPE_NFIELDS (type) - 1; i >= nbases; i--) |
1312 | { | |
1313 | char *t_field_name = TYPE_FIELD_NAME (type, i); | |
1314 | ||
db577aea | 1315 | if (t_field_name && (strcmp_iw (t_field_name, name) == 0)) |
c906108c | 1316 | { |
f23631e4 | 1317 | struct value *v; |
c906108c | 1318 | if (TYPE_FIELD_STATIC (type, i)) |
2c2738a0 DC |
1319 | { |
1320 | v = value_static_field (type, i); | |
1321 | if (v == 0) | |
8a3fe4f8 | 1322 | error (_("field %s is nonexistent or has been optimised out"), |
2c2738a0 DC |
1323 | name); |
1324 | } | |
c906108c | 1325 | else |
2c2738a0 DC |
1326 | { |
1327 | v = value_primitive_field (arg1, offset, i, type); | |
1328 | if (v == 0) | |
8a3fe4f8 | 1329 | error (_("there is no field named %s"), name); |
2c2738a0 | 1330 | } |
c906108c SS |
1331 | return v; |
1332 | } | |
1333 | ||
1334 | if (t_field_name | |
1335 | && (t_field_name[0] == '\0' | |
1336 | || (TYPE_CODE (type) == TYPE_CODE_UNION | |
db577aea | 1337 | && (strcmp_iw (t_field_name, "else") == 0)))) |
c906108c SS |
1338 | { |
1339 | struct type *field_type = TYPE_FIELD_TYPE (type, i); | |
1340 | if (TYPE_CODE (field_type) == TYPE_CODE_UNION | |
1341 | || TYPE_CODE (field_type) == TYPE_CODE_STRUCT) | |
1342 | { | |
ac3eeb49 MS |
1343 | /* Look for a match through the fields of an anonymous |
1344 | union, or anonymous struct. C++ provides anonymous | |
1345 | unions. | |
c906108c | 1346 | |
1b831c93 AC |
1347 | In the GNU Chill (now deleted from GDB) |
1348 | implementation of variant record types, each | |
1349 | <alternative field> has an (anonymous) union type, | |
1350 | each member of the union represents a <variant | |
1351 | alternative>. Each <variant alternative> is | |
1352 | represented as a struct, with a member for each | |
1353 | <variant field>. */ | |
c5aa993b | 1354 | |
f23631e4 | 1355 | struct value *v; |
c906108c SS |
1356 | int new_offset = offset; |
1357 | ||
db034ac5 AC |
1358 | /* This is pretty gross. In G++, the offset in an |
1359 | anonymous union is relative to the beginning of the | |
1b831c93 AC |
1360 | enclosing struct. In the GNU Chill (now deleted |
1361 | from GDB) implementation of variant records, the | |
1362 | bitpos is zero in an anonymous union field, so we | |
ac3eeb49 | 1363 | have to add the offset of the union here. */ |
c906108c SS |
1364 | if (TYPE_CODE (field_type) == TYPE_CODE_STRUCT |
1365 | || (TYPE_NFIELDS (field_type) > 0 | |
1366 | && TYPE_FIELD_BITPOS (field_type, 0) == 0)) | |
1367 | new_offset += TYPE_FIELD_BITPOS (type, i) / 8; | |
1368 | ||
ac3eeb49 MS |
1369 | v = search_struct_field (name, arg1, new_offset, |
1370 | field_type, | |
c906108c SS |
1371 | looking_for_baseclass); |
1372 | if (v) | |
1373 | return v; | |
1374 | } | |
1375 | } | |
1376 | } | |
1377 | ||
c5aa993b | 1378 | for (i = 0; i < nbases; i++) |
c906108c | 1379 | { |
f23631e4 | 1380 | struct value *v; |
c906108c | 1381 | struct type *basetype = check_typedef (TYPE_BASECLASS (type, i)); |
ac3eeb49 MS |
1382 | /* If we are looking for baseclasses, this is what we get when |
1383 | we hit them. But it could happen that the base part's member | |
1384 | name is not yet filled in. */ | |
c906108c SS |
1385 | int found_baseclass = (looking_for_baseclass |
1386 | && TYPE_BASECLASS_NAME (type, i) != NULL | |
ac3eeb49 MS |
1387 | && (strcmp_iw (name, |
1388 | TYPE_BASECLASS_NAME (type, | |
1389 | i)) == 0)); | |
c906108c SS |
1390 | |
1391 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
1392 | { | |
1393 | int boffset; | |
f23631e4 | 1394 | struct value *v2 = allocate_value (basetype); |
c906108c SS |
1395 | |
1396 | boffset = baseclass_offset (type, i, | |
0fd88904 | 1397 | value_contents (arg1) + offset, |
c906108c | 1398 | VALUE_ADDRESS (arg1) |
df407dfe | 1399 | + value_offset (arg1) + offset); |
c906108c | 1400 | if (boffset == -1) |
8a3fe4f8 | 1401 | error (_("virtual baseclass botch")); |
c906108c | 1402 | |
ac3eeb49 MS |
1403 | /* The virtual base class pointer might have been clobbered |
1404 | by the user program. Make sure that it still points to a | |
1405 | valid memory location. */ | |
c906108c SS |
1406 | |
1407 | boffset += offset; | |
1408 | if (boffset < 0 || boffset >= TYPE_LENGTH (type)) | |
1409 | { | |
1410 | CORE_ADDR base_addr; | |
c5aa993b | 1411 | |
ac3eeb49 MS |
1412 | base_addr = |
1413 | VALUE_ADDRESS (arg1) + value_offset (arg1) + boffset; | |
1414 | if (target_read_memory (base_addr, | |
1415 | value_contents_raw (v2), | |
c906108c | 1416 | TYPE_LENGTH (basetype)) != 0) |
8a3fe4f8 | 1417 | error (_("virtual baseclass botch")); |
c906108c SS |
1418 | VALUE_LVAL (v2) = lval_memory; |
1419 | VALUE_ADDRESS (v2) = base_addr; | |
1420 | } | |
1421 | else | |
1422 | { | |
1423 | VALUE_LVAL (v2) = VALUE_LVAL (arg1); | |
1424 | VALUE_ADDRESS (v2) = VALUE_ADDRESS (arg1); | |
65d3800a | 1425 | VALUE_FRAME_ID (v2) = VALUE_FRAME_ID (arg1); |
f5cf64a7 | 1426 | set_value_offset (v2, value_offset (arg1) + boffset); |
d69fe07e | 1427 | if (value_lazy (arg1)) |
dfa52d88 | 1428 | set_value_lazy (v2, 1); |
c906108c | 1429 | else |
990a07ab AC |
1430 | memcpy (value_contents_raw (v2), |
1431 | value_contents_raw (arg1) + boffset, | |
c906108c SS |
1432 | TYPE_LENGTH (basetype)); |
1433 | } | |
1434 | ||
1435 | if (found_baseclass) | |
1436 | return v2; | |
ac3eeb49 MS |
1437 | v = search_struct_field (name, v2, 0, |
1438 | TYPE_BASECLASS (type, i), | |
c906108c SS |
1439 | looking_for_baseclass); |
1440 | } | |
1441 | else if (found_baseclass) | |
1442 | v = value_primitive_field (arg1, offset, i, type); | |
1443 | else | |
1444 | v = search_struct_field (name, arg1, | |
ac3eeb49 MS |
1445 | offset + TYPE_BASECLASS_BITPOS (type, |
1446 | i) / 8, | |
c906108c | 1447 | basetype, looking_for_baseclass); |
c5aa993b JM |
1448 | if (v) |
1449 | return v; | |
c906108c SS |
1450 | } |
1451 | return NULL; | |
1452 | } | |
1453 | ||
ac3eeb49 MS |
1454 | /* Helper function used by value_struct_elt to recurse through |
1455 | baseclasses. Look for a field NAME in ARG1. Adjust the address of | |
1456 | ARG1 by OFFSET bytes, and search in it assuming it has (class) type | |
1457 | TYPE. | |
1458 | ||
1459 | If found, return value, else if name matched and args not return | |
1460 | (value) -1, else return NULL. */ | |
c906108c | 1461 | |
f23631e4 AC |
1462 | static struct value * |
1463 | search_struct_method (char *name, struct value **arg1p, | |
1464 | struct value **args, int offset, | |
aa1ee363 | 1465 | int *static_memfuncp, struct type *type) |
c906108c SS |
1466 | { |
1467 | int i; | |
f23631e4 | 1468 | struct value *v; |
c906108c SS |
1469 | int name_matched = 0; |
1470 | char dem_opname[64]; | |
1471 | ||
1472 | CHECK_TYPEDEF (type); | |
1473 | for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; i--) | |
1474 | { | |
1475 | char *t_field_name = TYPE_FN_FIELDLIST_NAME (type, i); | |
1476 | /* FIXME! May need to check for ARM demangling here */ | |
c5aa993b JM |
1477 | if (strncmp (t_field_name, "__", 2) == 0 || |
1478 | strncmp (t_field_name, "op", 2) == 0 || | |
1479 | strncmp (t_field_name, "type", 4) == 0) | |
c906108c | 1480 | { |
c5aa993b JM |
1481 | if (cplus_demangle_opname (t_field_name, dem_opname, DMGL_ANSI)) |
1482 | t_field_name = dem_opname; | |
1483 | else if (cplus_demangle_opname (t_field_name, dem_opname, 0)) | |
c906108c | 1484 | t_field_name = dem_opname; |
c906108c | 1485 | } |
db577aea | 1486 | if (t_field_name && (strcmp_iw (t_field_name, name) == 0)) |
c906108c SS |
1487 | { |
1488 | int j = TYPE_FN_FIELDLIST_LENGTH (type, i) - 1; | |
1489 | struct fn_field *f = TYPE_FN_FIELDLIST1 (type, i); | |
c5aa993b | 1490 | name_matched = 1; |
c906108c | 1491 | |
de17c821 | 1492 | check_stub_method_group (type, i); |
c906108c | 1493 | if (j > 0 && args == 0) |
8a3fe4f8 | 1494 | error (_("cannot resolve overloaded method `%s': no arguments supplied"), name); |
acf5ed49 | 1495 | else if (j == 0 && args == 0) |
c906108c | 1496 | { |
acf5ed49 DJ |
1497 | v = value_fn_field (arg1p, f, j, type, offset); |
1498 | if (v != NULL) | |
1499 | return v; | |
c906108c | 1500 | } |
acf5ed49 DJ |
1501 | else |
1502 | while (j >= 0) | |
1503 | { | |
acf5ed49 | 1504 | if (!typecmp (TYPE_FN_FIELD_STATIC_P (f, j), |
ad2f7632 DJ |
1505 | TYPE_VARARGS (TYPE_FN_FIELD_TYPE (f, j)), |
1506 | TYPE_NFIELDS (TYPE_FN_FIELD_TYPE (f, j)), | |
acf5ed49 DJ |
1507 | TYPE_FN_FIELD_ARGS (f, j), args)) |
1508 | { | |
1509 | if (TYPE_FN_FIELD_VIRTUAL_P (f, j)) | |
ac3eeb49 MS |
1510 | return value_virtual_fn_field (arg1p, f, j, |
1511 | type, offset); | |
1512 | if (TYPE_FN_FIELD_STATIC_P (f, j) | |
1513 | && static_memfuncp) | |
acf5ed49 DJ |
1514 | *static_memfuncp = 1; |
1515 | v = value_fn_field (arg1p, f, j, type, offset); | |
1516 | if (v != NULL) | |
1517 | return v; | |
1518 | } | |
1519 | j--; | |
1520 | } | |
c906108c SS |
1521 | } |
1522 | } | |
1523 | ||
1524 | for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--) | |
1525 | { | |
1526 | int base_offset; | |
1527 | ||
1528 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
1529 | { | |
086280be UW |
1530 | struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i)); |
1531 | const gdb_byte *base_valaddr; | |
1532 | ||
1533 | /* The virtual base class pointer might have been | |
1534 | clobbered by the user program. Make sure that it | |
1535 | still points to a valid memory location. */ | |
1536 | ||
1537 | if (offset < 0 || offset >= TYPE_LENGTH (type)) | |
c5aa993b | 1538 | { |
086280be UW |
1539 | gdb_byte *tmp = alloca (TYPE_LENGTH (baseclass)); |
1540 | if (target_read_memory (VALUE_ADDRESS (*arg1p) | |
1541 | + value_offset (*arg1p) + offset, | |
1542 | tmp, TYPE_LENGTH (baseclass)) != 0) | |
1543 | error (_("virtual baseclass botch")); | |
1544 | base_valaddr = tmp; | |
c5aa993b JM |
1545 | } |
1546 | else | |
086280be | 1547 | base_valaddr = value_contents (*arg1p) + offset; |
c5aa993b | 1548 | |
086280be UW |
1549 | base_offset = baseclass_offset (type, i, base_valaddr, |
1550 | VALUE_ADDRESS (*arg1p) | |
1551 | + value_offset (*arg1p) + offset); | |
1552 | if (base_offset == -1) | |
1553 | error (_("virtual baseclass botch")); | |
c5aa993b | 1554 | } |
c906108c SS |
1555 | else |
1556 | { | |
1557 | base_offset = TYPE_BASECLASS_BITPOS (type, i) / 8; | |
c5aa993b | 1558 | } |
c906108c SS |
1559 | v = search_struct_method (name, arg1p, args, base_offset + offset, |
1560 | static_memfuncp, TYPE_BASECLASS (type, i)); | |
f23631e4 | 1561 | if (v == (struct value *) - 1) |
c906108c SS |
1562 | { |
1563 | name_matched = 1; | |
1564 | } | |
1565 | else if (v) | |
1566 | { | |
ac3eeb49 MS |
1567 | /* FIXME-bothner: Why is this commented out? Why is it here? */ |
1568 | /* *arg1p = arg1_tmp; */ | |
c906108c | 1569 | return v; |
c5aa993b | 1570 | } |
c906108c | 1571 | } |
c5aa993b | 1572 | if (name_matched) |
f23631e4 | 1573 | return (struct value *) - 1; |
c5aa993b JM |
1574 | else |
1575 | return NULL; | |
c906108c SS |
1576 | } |
1577 | ||
1578 | /* Given *ARGP, a value of type (pointer to a)* structure/union, | |
ac3eeb49 MS |
1579 | extract the component named NAME from the ultimate target |
1580 | structure/union and return it as a value with its appropriate type. | |
c906108c SS |
1581 | ERR is used in the error message if *ARGP's type is wrong. |
1582 | ||
1583 | C++: ARGS is a list of argument types to aid in the selection of | |
1584 | an appropriate method. Also, handle derived types. | |
1585 | ||
1586 | STATIC_MEMFUNCP, if non-NULL, points to a caller-supplied location | |
1587 | where the truthvalue of whether the function that was resolved was | |
1588 | a static member function or not is stored. | |
1589 | ||
ac3eeb49 MS |
1590 | ERR is an error message to be printed in case the field is not |
1591 | found. */ | |
c906108c | 1592 | |
f23631e4 AC |
1593 | struct value * |
1594 | value_struct_elt (struct value **argp, struct value **args, | |
fba45db2 | 1595 | char *name, int *static_memfuncp, char *err) |
c906108c | 1596 | { |
52f0bd74 | 1597 | struct type *t; |
f23631e4 | 1598 | struct value *v; |
c906108c | 1599 | |
994b9211 | 1600 | *argp = coerce_array (*argp); |
c906108c | 1601 | |
df407dfe | 1602 | t = check_typedef (value_type (*argp)); |
c906108c SS |
1603 | |
1604 | /* Follow pointers until we get to a non-pointer. */ | |
1605 | ||
1606 | while (TYPE_CODE (t) == TYPE_CODE_PTR || TYPE_CODE (t) == TYPE_CODE_REF) | |
1607 | { | |
1608 | *argp = value_ind (*argp); | |
1609 | /* Don't coerce fn pointer to fn and then back again! */ | |
df407dfe | 1610 | if (TYPE_CODE (value_type (*argp)) != TYPE_CODE_FUNC) |
994b9211 | 1611 | *argp = coerce_array (*argp); |
df407dfe | 1612 | t = check_typedef (value_type (*argp)); |
c906108c SS |
1613 | } |
1614 | ||
c5aa993b | 1615 | if (TYPE_CODE (t) != TYPE_CODE_STRUCT |
c906108c | 1616 | && TYPE_CODE (t) != TYPE_CODE_UNION) |
8a3fe4f8 | 1617 | error (_("Attempt to extract a component of a value that is not a %s."), err); |
c906108c SS |
1618 | |
1619 | /* Assume it's not, unless we see that it is. */ | |
1620 | if (static_memfuncp) | |
c5aa993b | 1621 | *static_memfuncp = 0; |
c906108c SS |
1622 | |
1623 | if (!args) | |
1624 | { | |
1625 | /* if there are no arguments ...do this... */ | |
1626 | ||
ac3eeb49 MS |
1627 | /* Try as a field first, because if we succeed, there is less |
1628 | work to be done. */ | |
c906108c SS |
1629 | v = search_struct_field (name, *argp, 0, t, 0); |
1630 | if (v) | |
1631 | return v; | |
1632 | ||
1633 | /* C++: If it was not found as a data field, then try to | |
7b83ea04 | 1634 | return it as a pointer to a method. */ |
c906108c SS |
1635 | |
1636 | if (destructor_name_p (name, t)) | |
8a3fe4f8 | 1637 | error (_("Cannot get value of destructor")); |
c906108c | 1638 | |
ac3eeb49 MS |
1639 | v = search_struct_method (name, argp, args, 0, |
1640 | static_memfuncp, t); | |
c906108c | 1641 | |
f23631e4 | 1642 | if (v == (struct value *) - 1) |
55b39184 | 1643 | error (_("Cannot take address of method %s."), name); |
c906108c SS |
1644 | else if (v == 0) |
1645 | { | |
1646 | if (TYPE_NFN_FIELDS (t)) | |
8a3fe4f8 | 1647 | error (_("There is no member or method named %s."), name); |
c906108c | 1648 | else |
8a3fe4f8 | 1649 | error (_("There is no member named %s."), name); |
c906108c SS |
1650 | } |
1651 | return v; | |
1652 | } | |
1653 | ||
1654 | if (destructor_name_p (name, t)) | |
1655 | { | |
1656 | if (!args[1]) | |
1657 | { | |
1658 | /* Destructors are a special case. */ | |
1659 | int m_index, f_index; | |
1660 | ||
1661 | v = NULL; | |
1662 | if (get_destructor_fn_field (t, &m_index, &f_index)) | |
1663 | { | |
ac3eeb49 MS |
1664 | v = value_fn_field (NULL, |
1665 | TYPE_FN_FIELDLIST1 (t, m_index), | |
c906108c SS |
1666 | f_index, NULL, 0); |
1667 | } | |
1668 | if (v == NULL) | |
ac3eeb49 MS |
1669 | error (_("could not find destructor function named %s."), |
1670 | name); | |
c906108c SS |
1671 | else |
1672 | return v; | |
1673 | } | |
1674 | else | |
1675 | { | |
8a3fe4f8 | 1676 | error (_("destructor should not have any argument")); |
c906108c SS |
1677 | } |
1678 | } | |
1679 | else | |
ac3eeb49 MS |
1680 | v = search_struct_method (name, argp, args, 0, |
1681 | static_memfuncp, t); | |
7168a814 | 1682 | |
f23631e4 | 1683 | if (v == (struct value *) - 1) |
c906108c | 1684 | { |
8a3fe4f8 | 1685 | error (_("One of the arguments you tried to pass to %s could not be converted to what the function wants."), name); |
c906108c SS |
1686 | } |
1687 | else if (v == 0) | |
1688 | { | |
ac3eeb49 MS |
1689 | /* See if user tried to invoke data as function. If so, hand it |
1690 | back. If it's not callable (i.e., a pointer to function), | |
7b83ea04 | 1691 | gdb should give an error. */ |
c906108c SS |
1692 | v = search_struct_field (name, *argp, 0, t, 0); |
1693 | } | |
1694 | ||
1695 | if (!v) | |
8a3fe4f8 | 1696 | error (_("Structure has no component named %s."), name); |
c906108c SS |
1697 | return v; |
1698 | } | |
1699 | ||
ac3eeb49 MS |
1700 | /* Search through the methods of an object (and its bases) to find a |
1701 | specified method. Return the pointer to the fn_field list of | |
1702 | overloaded instances. | |
1703 | ||
1704 | Helper function for value_find_oload_list. | |
1705 | ARGP is a pointer to a pointer to a value (the object). | |
1706 | METHOD is a string containing the method name. | |
1707 | OFFSET is the offset within the value. | |
1708 | TYPE is the assumed type of the object. | |
1709 | NUM_FNS is the number of overloaded instances. | |
1710 | BASETYPE is set to the actual type of the subobject where the | |
1711 | method is found. | |
1712 | BOFFSET is the offset of the base subobject where the method is found. | |
1713 | */ | |
c906108c | 1714 | |
7a292a7a | 1715 | static struct fn_field * |
ac3eeb49 MS |
1716 | find_method_list (struct value **argp, char *method, |
1717 | int offset, struct type *type, int *num_fns, | |
fba45db2 | 1718 | struct type **basetype, int *boffset) |
c906108c SS |
1719 | { |
1720 | int i; | |
c5aa993b | 1721 | struct fn_field *f; |
c906108c SS |
1722 | CHECK_TYPEDEF (type); |
1723 | ||
1724 | *num_fns = 0; | |
1725 | ||
ac3eeb49 | 1726 | /* First check in object itself. */ |
c5aa993b | 1727 | for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; i--) |
c906108c | 1728 | { |
ac3eeb49 | 1729 | /* pai: FIXME What about operators and type conversions? */ |
c5aa993b | 1730 | char *fn_field_name = TYPE_FN_FIELDLIST_NAME (type, i); |
db577aea | 1731 | if (fn_field_name && (strcmp_iw (fn_field_name, method) == 0)) |
c5aa993b | 1732 | { |
4a1970e4 DJ |
1733 | int len = TYPE_FN_FIELDLIST_LENGTH (type, i); |
1734 | struct fn_field *f = TYPE_FN_FIELDLIST1 (type, i); | |
4a1970e4 DJ |
1735 | |
1736 | *num_fns = len; | |
c5aa993b JM |
1737 | *basetype = type; |
1738 | *boffset = offset; | |
4a1970e4 | 1739 | |
de17c821 DJ |
1740 | /* Resolve any stub methods. */ |
1741 | check_stub_method_group (type, i); | |
4a1970e4 DJ |
1742 | |
1743 | return f; | |
c5aa993b JM |
1744 | } |
1745 | } | |
1746 | ||
ac3eeb49 | 1747 | /* Not found in object, check in base subobjects. */ |
c906108c SS |
1748 | for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--) |
1749 | { | |
1750 | int base_offset; | |
1751 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
1752 | { | |
086280be UW |
1753 | base_offset = value_offset (*argp) + offset; |
1754 | base_offset = baseclass_offset (type, i, | |
1755 | value_contents (*argp) + base_offset, | |
1756 | VALUE_ADDRESS (*argp) + base_offset); | |
1757 | if (base_offset == -1) | |
1758 | error (_("virtual baseclass botch")); | |
c5aa993b | 1759 | } |
ac3eeb49 MS |
1760 | else /* Non-virtual base, simply use bit position from debug |
1761 | info. */ | |
c906108c SS |
1762 | { |
1763 | base_offset = TYPE_BASECLASS_BITPOS (type, i) / 8; | |
c5aa993b | 1764 | } |
c906108c | 1765 | f = find_method_list (argp, method, base_offset + offset, |
ac3eeb49 MS |
1766 | TYPE_BASECLASS (type, i), num_fns, |
1767 | basetype, boffset); | |
c906108c | 1768 | if (f) |
c5aa993b | 1769 | return f; |
c906108c | 1770 | } |
c5aa993b | 1771 | return NULL; |
c906108c SS |
1772 | } |
1773 | ||
1774 | /* Return the list of overloaded methods of a specified name. | |
ac3eeb49 MS |
1775 | |
1776 | ARGP is a pointer to a pointer to a value (the object). | |
1777 | METHOD is the method name. | |
1778 | OFFSET is the offset within the value contents. | |
1779 | NUM_FNS is the number of overloaded instances. | |
1780 | BASETYPE is set to the type of the base subobject that defines the | |
1781 | method. | |
1782 | BOFFSET is the offset of the base subobject which defines the method. | |
1783 | */ | |
c906108c SS |
1784 | |
1785 | struct fn_field * | |
ac3eeb49 MS |
1786 | value_find_oload_method_list (struct value **argp, char *method, |
1787 | int offset, int *num_fns, | |
1788 | struct type **basetype, int *boffset) | |
c906108c | 1789 | { |
c5aa993b | 1790 | struct type *t; |
c906108c | 1791 | |
df407dfe | 1792 | t = check_typedef (value_type (*argp)); |
c906108c | 1793 | |
ac3eeb49 | 1794 | /* Code snarfed from value_struct_elt. */ |
c906108c SS |
1795 | while (TYPE_CODE (t) == TYPE_CODE_PTR || TYPE_CODE (t) == TYPE_CODE_REF) |
1796 | { | |
1797 | *argp = value_ind (*argp); | |
1798 | /* Don't coerce fn pointer to fn and then back again! */ | |
df407dfe | 1799 | if (TYPE_CODE (value_type (*argp)) != TYPE_CODE_FUNC) |
994b9211 | 1800 | *argp = coerce_array (*argp); |
df407dfe | 1801 | t = check_typedef (value_type (*argp)); |
c906108c | 1802 | } |
c5aa993b | 1803 | |
c5aa993b JM |
1804 | if (TYPE_CODE (t) != TYPE_CODE_STRUCT |
1805 | && TYPE_CODE (t) != TYPE_CODE_UNION) | |
8a3fe4f8 | 1806 | error (_("Attempt to extract a component of a value that is not a struct or union")); |
c5aa993b | 1807 | |
ac3eeb49 MS |
1808 | return find_method_list (argp, method, 0, t, num_fns, |
1809 | basetype, boffset); | |
c906108c SS |
1810 | } |
1811 | ||
1812 | /* Given an array of argument types (ARGTYPES) (which includes an | |
1813 | entry for "this" in the case of C++ methods), the number of | |
1814 | arguments NARGS, the NAME of a function whether it's a method or | |
1815 | not (METHOD), and the degree of laxness (LAX) in conforming to | |
1816 | overload resolution rules in ANSI C++, find the best function that | |
1817 | matches on the argument types according to the overload resolution | |
1818 | rules. | |
1819 | ||
1820 | In the case of class methods, the parameter OBJ is an object value | |
1821 | in which to search for overloaded methods. | |
1822 | ||
1823 | In the case of non-method functions, the parameter FSYM is a symbol | |
1824 | corresponding to one of the overloaded functions. | |
1825 | ||
1826 | Return value is an integer: 0 -> good match, 10 -> debugger applied | |
1827 | non-standard coercions, 100 -> incompatible. | |
1828 | ||
1829 | If a method is being searched for, VALP will hold the value. | |
ac3eeb49 MS |
1830 | If a non-method is being searched for, SYMP will hold the symbol |
1831 | for it. | |
c906108c SS |
1832 | |
1833 | If a method is being searched for, and it is a static method, | |
1834 | then STATICP will point to a non-zero value. | |
1835 | ||
1836 | Note: This function does *not* check the value of | |
1837 | overload_resolution. Caller must check it to see whether overload | |
1838 | resolution is permitted. | |
ac3eeb49 | 1839 | */ |
c906108c SS |
1840 | |
1841 | int | |
ac3eeb49 MS |
1842 | find_overload_match (struct type **arg_types, int nargs, |
1843 | char *name, int method, int lax, | |
1844 | struct value **objp, struct symbol *fsym, | |
1845 | struct value **valp, struct symbol **symp, | |
1846 | int *staticp) | |
c906108c | 1847 | { |
7f8c9282 | 1848 | struct value *obj = (objp ? *objp : NULL); |
ac3eeb49 MS |
1849 | /* Index of best overloaded function. */ |
1850 | int oload_champ; | |
1851 | /* The measure for the current best match. */ | |
1852 | struct badness_vector *oload_champ_bv = NULL; | |
f23631e4 | 1853 | struct value *temp = obj; |
ac3eeb49 MS |
1854 | /* For methods, the list of overloaded methods. */ |
1855 | struct fn_field *fns_ptr = NULL; | |
1856 | /* For non-methods, the list of overloaded function symbols. */ | |
1857 | struct symbol **oload_syms = NULL; | |
1858 | /* Number of overloaded instances being considered. */ | |
1859 | int num_fns = 0; | |
c5aa993b | 1860 | struct type *basetype = NULL; |
c906108c | 1861 | int boffset; |
52f0bd74 | 1862 | int ix; |
4a1970e4 | 1863 | int static_offset; |
8d577d32 | 1864 | struct cleanup *old_cleanups = NULL; |
c906108c | 1865 | |
8d577d32 | 1866 | const char *obj_type_name = NULL; |
c5aa993b | 1867 | char *func_name = NULL; |
8d577d32 | 1868 | enum oload_classification match_quality; |
c906108c | 1869 | |
ac3eeb49 | 1870 | /* Get the list of overloaded methods or functions. */ |
c906108c SS |
1871 | if (method) |
1872 | { | |
a2ca50ae | 1873 | gdb_assert (obj); |
df407dfe | 1874 | obj_type_name = TYPE_NAME (value_type (obj)); |
c906108c | 1875 | /* Hack: evaluate_subexp_standard often passes in a pointer |
ac3eeb49 MS |
1876 | value rather than the object itself, so try again. */ |
1877 | if ((!obj_type_name || !*obj_type_name) | |
1878 | && (TYPE_CODE (value_type (obj)) == TYPE_CODE_PTR)) | |
df407dfe | 1879 | obj_type_name = TYPE_NAME (TYPE_TARGET_TYPE (value_type (obj))); |
c906108c | 1880 | |
ac3eeb49 MS |
1881 | fns_ptr = value_find_oload_method_list (&temp, name, |
1882 | 0, &num_fns, | |
c5aa993b | 1883 | &basetype, &boffset); |
c906108c | 1884 | if (!fns_ptr || !num_fns) |
8a3fe4f8 | 1885 | error (_("Couldn't find method %s%s%s"), |
c5aa993b JM |
1886 | obj_type_name, |
1887 | (obj_type_name && *obj_type_name) ? "::" : "", | |
1888 | name); | |
4a1970e4 | 1889 | /* If we are dealing with stub method types, they should have |
ac3eeb49 MS |
1890 | been resolved by find_method_list via |
1891 | value_find_oload_method_list above. */ | |
4a1970e4 | 1892 | gdb_assert (TYPE_DOMAIN_TYPE (fns_ptr[0].type) != NULL); |
ac3eeb49 MS |
1893 | oload_champ = find_oload_champ (arg_types, nargs, method, |
1894 | num_fns, fns_ptr, | |
1895 | oload_syms, &oload_champ_bv); | |
c906108c SS |
1896 | } |
1897 | else | |
1898 | { | |
8d577d32 | 1899 | const char *qualified_name = SYMBOL_CPLUS_DEMANGLED_NAME (fsym); |
c906108c | 1900 | |
d9639e13 DJ |
1901 | /* If we have a C++ name, try to extract just the function |
1902 | part. */ | |
1903 | if (qualified_name) | |
1904 | func_name = cp_func_name (qualified_name); | |
1905 | ||
1906 | /* If there was no C++ name, this must be a C-style function. | |
1907 | Just return the same symbol. Do the same if cp_func_name | |
1908 | fails for some reason. */ | |
8d577d32 | 1909 | if (func_name == NULL) |
7b83ea04 | 1910 | { |
917317f4 | 1911 | *symp = fsym; |
7b83ea04 AC |
1912 | return 0; |
1913 | } | |
917317f4 | 1914 | |
8d577d32 DC |
1915 | old_cleanups = make_cleanup (xfree, func_name); |
1916 | make_cleanup (xfree, oload_syms); | |
1917 | make_cleanup (xfree, oload_champ_bv); | |
1918 | ||
1919 | oload_champ = find_oload_champ_namespace (arg_types, nargs, | |
1920 | func_name, | |
1921 | qualified_name, | |
1922 | &oload_syms, | |
1923 | &oload_champ_bv); | |
1924 | } | |
1925 | ||
1926 | /* Check how bad the best match is. */ | |
1927 | ||
ac3eeb49 MS |
1928 | match_quality = |
1929 | classify_oload_match (oload_champ_bv, nargs, | |
1930 | oload_method_static (method, fns_ptr, | |
1931 | oload_champ)); | |
8d577d32 DC |
1932 | |
1933 | if (match_quality == INCOMPATIBLE) | |
1934 | { | |
1935 | if (method) | |
8a3fe4f8 | 1936 | error (_("Cannot resolve method %s%s%s to any overloaded instance"), |
8d577d32 DC |
1937 | obj_type_name, |
1938 | (obj_type_name && *obj_type_name) ? "::" : "", | |
1939 | name); | |
1940 | else | |
8a3fe4f8 | 1941 | error (_("Cannot resolve function %s to any overloaded instance"), |
8d577d32 DC |
1942 | func_name); |
1943 | } | |
1944 | else if (match_quality == NON_STANDARD) | |
1945 | { | |
1946 | if (method) | |
8a3fe4f8 | 1947 | warning (_("Using non-standard conversion to match method %s%s%s to supplied arguments"), |
8d577d32 DC |
1948 | obj_type_name, |
1949 | (obj_type_name && *obj_type_name) ? "::" : "", | |
1950 | name); | |
1951 | else | |
8a3fe4f8 | 1952 | warning (_("Using non-standard conversion to match function %s to supplied arguments"), |
8d577d32 DC |
1953 | func_name); |
1954 | } | |
1955 | ||
1956 | if (method) | |
1957 | { | |
1958 | if (staticp != NULL) | |
1959 | *staticp = oload_method_static (method, fns_ptr, oload_champ); | |
1960 | if (TYPE_FN_FIELD_VIRTUAL_P (fns_ptr, oload_champ)) | |
ac3eeb49 MS |
1961 | *valp = value_virtual_fn_field (&temp, fns_ptr, oload_champ, |
1962 | basetype, boffset); | |
8d577d32 | 1963 | else |
ac3eeb49 MS |
1964 | *valp = value_fn_field (&temp, fns_ptr, oload_champ, |
1965 | basetype, boffset); | |
8d577d32 DC |
1966 | } |
1967 | else | |
1968 | { | |
1969 | *symp = oload_syms[oload_champ]; | |
1970 | } | |
1971 | ||
1972 | if (objp) | |
1973 | { | |
df407dfe AC |
1974 | if (TYPE_CODE (value_type (temp)) != TYPE_CODE_PTR |
1975 | && TYPE_CODE (value_type (*objp)) == TYPE_CODE_PTR) | |
8d577d32 DC |
1976 | { |
1977 | temp = value_addr (temp); | |
1978 | } | |
1979 | *objp = temp; | |
1980 | } | |
1981 | if (old_cleanups != NULL) | |
1982 | do_cleanups (old_cleanups); | |
1983 | ||
1984 | switch (match_quality) | |
1985 | { | |
1986 | case INCOMPATIBLE: | |
1987 | return 100; | |
1988 | case NON_STANDARD: | |
1989 | return 10; | |
1990 | default: /* STANDARD */ | |
1991 | return 0; | |
1992 | } | |
1993 | } | |
1994 | ||
1995 | /* Find the best overload match, searching for FUNC_NAME in namespaces | |
1996 | contained in QUALIFIED_NAME until it either finds a good match or | |
1997 | runs out of namespaces. It stores the overloaded functions in | |
1998 | *OLOAD_SYMS, and the badness vector in *OLOAD_CHAMP_BV. The | |
1999 | calling function is responsible for freeing *OLOAD_SYMS and | |
2000 | *OLOAD_CHAMP_BV. */ | |
2001 | ||
2002 | static int | |
2003 | find_oload_champ_namespace (struct type **arg_types, int nargs, | |
2004 | const char *func_name, | |
2005 | const char *qualified_name, | |
2006 | struct symbol ***oload_syms, | |
2007 | struct badness_vector **oload_champ_bv) | |
2008 | { | |
2009 | int oload_champ; | |
2010 | ||
2011 | find_oload_champ_namespace_loop (arg_types, nargs, | |
2012 | func_name, | |
2013 | qualified_name, 0, | |
2014 | oload_syms, oload_champ_bv, | |
2015 | &oload_champ); | |
2016 | ||
2017 | return oload_champ; | |
2018 | } | |
2019 | ||
2020 | /* Helper function for find_oload_champ_namespace; NAMESPACE_LEN is | |
2021 | how deep we've looked for namespaces, and the champ is stored in | |
2022 | OLOAD_CHAMP. The return value is 1 if the champ is a good one, 0 | |
2023 | if it isn't. | |
2024 | ||
2025 | It is the caller's responsibility to free *OLOAD_SYMS and | |
2026 | *OLOAD_CHAMP_BV. */ | |
2027 | ||
2028 | static int | |
2029 | find_oload_champ_namespace_loop (struct type **arg_types, int nargs, | |
2030 | const char *func_name, | |
2031 | const char *qualified_name, | |
2032 | int namespace_len, | |
2033 | struct symbol ***oload_syms, | |
2034 | struct badness_vector **oload_champ_bv, | |
2035 | int *oload_champ) | |
2036 | { | |
2037 | int next_namespace_len = namespace_len; | |
2038 | int searched_deeper = 0; | |
2039 | int num_fns = 0; | |
2040 | struct cleanup *old_cleanups; | |
2041 | int new_oload_champ; | |
2042 | struct symbol **new_oload_syms; | |
2043 | struct badness_vector *new_oload_champ_bv; | |
2044 | char *new_namespace; | |
2045 | ||
2046 | if (next_namespace_len != 0) | |
2047 | { | |
2048 | gdb_assert (qualified_name[next_namespace_len] == ':'); | |
2049 | next_namespace_len += 2; | |
c906108c | 2050 | } |
ac3eeb49 MS |
2051 | next_namespace_len += |
2052 | cp_find_first_component (qualified_name + next_namespace_len); | |
8d577d32 DC |
2053 | |
2054 | /* Initialize these to values that can safely be xfree'd. */ | |
2055 | *oload_syms = NULL; | |
2056 | *oload_champ_bv = NULL; | |
c5aa993b | 2057 | |
ac3eeb49 MS |
2058 | /* First, see if we have a deeper namespace we can search in. |
2059 | If we get a good match there, use it. */ | |
8d577d32 DC |
2060 | |
2061 | if (qualified_name[next_namespace_len] == ':') | |
2062 | { | |
2063 | searched_deeper = 1; | |
2064 | ||
2065 | if (find_oload_champ_namespace_loop (arg_types, nargs, | |
2066 | func_name, qualified_name, | |
2067 | next_namespace_len, | |
2068 | oload_syms, oload_champ_bv, | |
2069 | oload_champ)) | |
2070 | { | |
2071 | return 1; | |
2072 | } | |
2073 | }; | |
2074 | ||
2075 | /* If we reach here, either we're in the deepest namespace or we | |
2076 | didn't find a good match in a deeper namespace. But, in the | |
2077 | latter case, we still have a bad match in a deeper namespace; | |
2078 | note that we might not find any match at all in the current | |
2079 | namespace. (There's always a match in the deepest namespace, | |
2080 | because this overload mechanism only gets called if there's a | |
2081 | function symbol to start off with.) */ | |
2082 | ||
2083 | old_cleanups = make_cleanup (xfree, *oload_syms); | |
2084 | old_cleanups = make_cleanup (xfree, *oload_champ_bv); | |
2085 | new_namespace = alloca (namespace_len + 1); | |
2086 | strncpy (new_namespace, qualified_name, namespace_len); | |
2087 | new_namespace[namespace_len] = '\0'; | |
2088 | new_oload_syms = make_symbol_overload_list (func_name, | |
2089 | new_namespace); | |
2090 | while (new_oload_syms[num_fns]) | |
2091 | ++num_fns; | |
2092 | ||
2093 | new_oload_champ = find_oload_champ (arg_types, nargs, 0, num_fns, | |
2094 | NULL, new_oload_syms, | |
2095 | &new_oload_champ_bv); | |
2096 | ||
2097 | /* Case 1: We found a good match. Free earlier matches (if any), | |
2098 | and return it. Case 2: We didn't find a good match, but we're | |
2099 | not the deepest function. Then go with the bad match that the | |
2100 | deeper function found. Case 3: We found a bad match, and we're | |
2101 | the deepest function. Then return what we found, even though | |
2102 | it's a bad match. */ | |
2103 | ||
2104 | if (new_oload_champ != -1 | |
2105 | && classify_oload_match (new_oload_champ_bv, nargs, 0) == STANDARD) | |
2106 | { | |
2107 | *oload_syms = new_oload_syms; | |
2108 | *oload_champ = new_oload_champ; | |
2109 | *oload_champ_bv = new_oload_champ_bv; | |
2110 | do_cleanups (old_cleanups); | |
2111 | return 1; | |
2112 | } | |
2113 | else if (searched_deeper) | |
2114 | { | |
2115 | xfree (new_oload_syms); | |
2116 | xfree (new_oload_champ_bv); | |
2117 | discard_cleanups (old_cleanups); | |
2118 | return 0; | |
2119 | } | |
2120 | else | |
2121 | { | |
2122 | gdb_assert (new_oload_champ != -1); | |
2123 | *oload_syms = new_oload_syms; | |
2124 | *oload_champ = new_oload_champ; | |
2125 | *oload_champ_bv = new_oload_champ_bv; | |
2126 | discard_cleanups (old_cleanups); | |
2127 | return 0; | |
2128 | } | |
2129 | } | |
2130 | ||
2131 | /* Look for a function to take NARGS args of types ARG_TYPES. Find | |
2132 | the best match from among the overloaded methods or functions | |
2133 | (depending on METHOD) given by FNS_PTR or OLOAD_SYMS, respectively. | |
2134 | The number of methods/functions in the list is given by NUM_FNS. | |
2135 | Return the index of the best match; store an indication of the | |
2136 | quality of the match in OLOAD_CHAMP_BV. | |
2137 | ||
2138 | It is the caller's responsibility to free *OLOAD_CHAMP_BV. */ | |
2139 | ||
2140 | static int | |
2141 | find_oload_champ (struct type **arg_types, int nargs, int method, | |
2142 | int num_fns, struct fn_field *fns_ptr, | |
2143 | struct symbol **oload_syms, | |
2144 | struct badness_vector **oload_champ_bv) | |
2145 | { | |
2146 | int ix; | |
ac3eeb49 MS |
2147 | /* A measure of how good an overloaded instance is. */ |
2148 | struct badness_vector *bv; | |
2149 | /* Index of best overloaded function. */ | |
2150 | int oload_champ = -1; | |
2151 | /* Current ambiguity state for overload resolution. */ | |
2152 | int oload_ambiguous = 0; | |
2153 | /* 0 => no ambiguity, 1 => two good funcs, 2 => incomparable funcs. */ | |
8d577d32 DC |
2154 | |
2155 | *oload_champ_bv = NULL; | |
c906108c | 2156 | |
ac3eeb49 | 2157 | /* Consider each candidate in turn. */ |
c906108c SS |
2158 | for (ix = 0; ix < num_fns; ix++) |
2159 | { | |
8d577d32 DC |
2160 | int jj; |
2161 | int static_offset = oload_method_static (method, fns_ptr, ix); | |
2162 | int nparms; | |
2163 | struct type **parm_types; | |
2164 | ||
db577aea AC |
2165 | if (method) |
2166 | { | |
ad2f7632 | 2167 | nparms = TYPE_NFIELDS (TYPE_FN_FIELD_TYPE (fns_ptr, ix)); |
db577aea AC |
2168 | } |
2169 | else | |
2170 | { | |
ac3eeb49 MS |
2171 | /* If it's not a method, this is the proper place. */ |
2172 | nparms = TYPE_NFIELDS (SYMBOL_TYPE (oload_syms[ix])); | |
db577aea | 2173 | } |
c906108c | 2174 | |
ac3eeb49 MS |
2175 | /* Prepare array of parameter types. */ |
2176 | parm_types = (struct type **) | |
2177 | xmalloc (nparms * (sizeof (struct type *))); | |
c906108c | 2178 | for (jj = 0; jj < nparms; jj++) |
db577aea | 2179 | parm_types[jj] = (method |
ad2f7632 | 2180 | ? (TYPE_FN_FIELD_ARGS (fns_ptr, ix)[jj].type) |
ac3eeb49 MS |
2181 | : TYPE_FIELD_TYPE (SYMBOL_TYPE (oload_syms[ix]), |
2182 | jj)); | |
c906108c | 2183 | |
ac3eeb49 MS |
2184 | /* Compare parameter types to supplied argument types. Skip |
2185 | THIS for static methods. */ | |
2186 | bv = rank_function (parm_types, nparms, | |
2187 | arg_types + static_offset, | |
4a1970e4 | 2188 | nargs - static_offset); |
c5aa993b | 2189 | |
8d577d32 | 2190 | if (!*oload_champ_bv) |
c5aa993b | 2191 | { |
8d577d32 | 2192 | *oload_champ_bv = bv; |
c5aa993b | 2193 | oload_champ = 0; |
c5aa993b | 2194 | } |
ac3eeb49 MS |
2195 | else /* See whether current candidate is better or worse than |
2196 | previous best. */ | |
8d577d32 | 2197 | switch (compare_badness (bv, *oload_champ_bv)) |
c5aa993b | 2198 | { |
ac3eeb49 MS |
2199 | case 0: /* Top two contenders are equally good. */ |
2200 | oload_ambiguous = 1; | |
c5aa993b | 2201 | break; |
ac3eeb49 MS |
2202 | case 1: /* Incomparable top contenders. */ |
2203 | oload_ambiguous = 2; | |
c5aa993b | 2204 | break; |
ac3eeb49 MS |
2205 | case 2: /* New champion, record details. */ |
2206 | *oload_champ_bv = bv; | |
c5aa993b JM |
2207 | oload_ambiguous = 0; |
2208 | oload_champ = ix; | |
c5aa993b JM |
2209 | break; |
2210 | case 3: | |
2211 | default: | |
2212 | break; | |
2213 | } | |
b8c9b27d | 2214 | xfree (parm_types); |
6b1ba9a0 ND |
2215 | if (overload_debug) |
2216 | { | |
2217 | if (method) | |
ac3eeb49 MS |
2218 | fprintf_filtered (gdb_stderr, |
2219 | "Overloaded method instance %s, # of parms %d\n", | |
2220 | fns_ptr[ix].physname, nparms); | |
6b1ba9a0 | 2221 | else |
ac3eeb49 MS |
2222 | fprintf_filtered (gdb_stderr, |
2223 | "Overloaded function instance %s # of parms %d\n", | |
2224 | SYMBOL_DEMANGLED_NAME (oload_syms[ix]), | |
2225 | nparms); | |
4a1970e4 | 2226 | for (jj = 0; jj < nargs - static_offset; jj++) |
ac3eeb49 MS |
2227 | fprintf_filtered (gdb_stderr, |
2228 | "...Badness @ %d : %d\n", | |
2229 | jj, bv->rank[jj]); | |
2230 | fprintf_filtered (gdb_stderr, | |
2231 | "Overload resolution champion is %d, ambiguous? %d\n", | |
2232 | oload_champ, oload_ambiguous); | |
6b1ba9a0 | 2233 | } |
c906108c SS |
2234 | } |
2235 | ||
8d577d32 DC |
2236 | return oload_champ; |
2237 | } | |
6b1ba9a0 | 2238 | |
8d577d32 DC |
2239 | /* Return 1 if we're looking at a static method, 0 if we're looking at |
2240 | a non-static method or a function that isn't a method. */ | |
c906108c | 2241 | |
8d577d32 DC |
2242 | static int |
2243 | oload_method_static (int method, struct fn_field *fns_ptr, int index) | |
2244 | { | |
2245 | if (method && TYPE_FN_FIELD_STATIC_P (fns_ptr, index)) | |
2246 | return 1; | |
c906108c | 2247 | else |
8d577d32 DC |
2248 | return 0; |
2249 | } | |
c906108c | 2250 | |
8d577d32 DC |
2251 | /* Check how good an overload match OLOAD_CHAMP_BV represents. */ |
2252 | ||
2253 | static enum oload_classification | |
2254 | classify_oload_match (struct badness_vector *oload_champ_bv, | |
2255 | int nargs, | |
2256 | int static_offset) | |
2257 | { | |
2258 | int ix; | |
2259 | ||
2260 | for (ix = 1; ix <= nargs - static_offset; ix++) | |
7f8c9282 | 2261 | { |
8d577d32 | 2262 | if (oload_champ_bv->rank[ix] >= 100) |
ac3eeb49 | 2263 | return INCOMPATIBLE; /* Truly mismatched types. */ |
8d577d32 | 2264 | else if (oload_champ_bv->rank[ix] >= 10) |
ac3eeb49 MS |
2265 | return NON_STANDARD; /* Non-standard type conversions |
2266 | needed. */ | |
7f8c9282 | 2267 | } |
02f0d45d | 2268 | |
8d577d32 | 2269 | return STANDARD; /* Only standard conversions needed. */ |
c906108c SS |
2270 | } |
2271 | ||
ac3eeb49 MS |
2272 | /* C++: return 1 is NAME is a legitimate name for the destructor of |
2273 | type TYPE. If TYPE does not have a destructor, or if NAME is | |
2274 | inappropriate for TYPE, an error is signaled. */ | |
c906108c | 2275 | int |
fba45db2 | 2276 | destructor_name_p (const char *name, const struct type *type) |
c906108c | 2277 | { |
ac3eeb49 | 2278 | /* Destructors are a special case. */ |
c906108c SS |
2279 | |
2280 | if (name[0] == '~') | |
2281 | { | |
2282 | char *dname = type_name_no_tag (type); | |
2283 | char *cp = strchr (dname, '<'); | |
2284 | unsigned int len; | |
2285 | ||
2286 | /* Do not compare the template part for template classes. */ | |
2287 | if (cp == NULL) | |
2288 | len = strlen (dname); | |
2289 | else | |
2290 | len = cp - dname; | |
bf896cb0 | 2291 | if (strlen (name + 1) != len || strncmp (dname, name + 1, len) != 0) |
8a3fe4f8 | 2292 | error (_("name of destructor must equal name of class")); |
c906108c SS |
2293 | else |
2294 | return 1; | |
2295 | } | |
2296 | return 0; | |
2297 | } | |
2298 | ||
2299 | /* Helper function for check_field: Given TYPE, a structure/union, | |
ac3eeb49 MS |
2300 | return 1 if the component named NAME from the ultimate target |
2301 | structure/union is defined, otherwise, return 0. */ | |
c906108c SS |
2302 | |
2303 | static int | |
aa1ee363 | 2304 | check_field_in (struct type *type, const char *name) |
c906108c | 2305 | { |
52f0bd74 | 2306 | int i; |
c906108c SS |
2307 | |
2308 | for (i = TYPE_NFIELDS (type) - 1; i >= TYPE_N_BASECLASSES (type); i--) | |
2309 | { | |
2310 | char *t_field_name = TYPE_FIELD_NAME (type, i); | |
db577aea | 2311 | if (t_field_name && (strcmp_iw (t_field_name, name) == 0)) |
c906108c SS |
2312 | return 1; |
2313 | } | |
2314 | ||
ac3eeb49 MS |
2315 | /* C++: If it was not found as a data field, then try to return it |
2316 | as a pointer to a method. */ | |
c906108c SS |
2317 | |
2318 | /* Destructors are a special case. */ | |
2319 | if (destructor_name_p (name, type)) | |
2320 | { | |
2321 | int m_index, f_index; | |
2322 | ||
2323 | return get_destructor_fn_field (type, &m_index, &f_index); | |
2324 | } | |
2325 | ||
2326 | for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; --i) | |
2327 | { | |
db577aea | 2328 | if (strcmp_iw (TYPE_FN_FIELDLIST_NAME (type, i), name) == 0) |
c906108c SS |
2329 | return 1; |
2330 | } | |
2331 | ||
2332 | for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--) | |
2333 | if (check_field_in (TYPE_BASECLASS (type, i), name)) | |
2334 | return 1; | |
c5aa993b | 2335 | |
c906108c SS |
2336 | return 0; |
2337 | } | |
2338 | ||
2339 | ||
2340 | /* C++: Given ARG1, a value of type (pointer to a)* structure/union, | |
ac3eeb49 MS |
2341 | return 1 if the component named NAME from the ultimate target |
2342 | structure/union is defined, otherwise, return 0. */ | |
c906108c SS |
2343 | |
2344 | int | |
c68a6671 | 2345 | check_field (struct value *arg1, const char *name) |
c906108c | 2346 | { |
52f0bd74 | 2347 | struct type *t; |
c906108c | 2348 | |
994b9211 | 2349 | arg1 = coerce_array (arg1); |
c906108c | 2350 | |
df407dfe | 2351 | t = value_type (arg1); |
c906108c SS |
2352 | |
2353 | /* Follow pointers until we get to a non-pointer. */ | |
2354 | ||
2355 | for (;;) | |
2356 | { | |
2357 | CHECK_TYPEDEF (t); | |
ac3eeb49 MS |
2358 | if (TYPE_CODE (t) != TYPE_CODE_PTR |
2359 | && TYPE_CODE (t) != TYPE_CODE_REF) | |
c906108c SS |
2360 | break; |
2361 | t = TYPE_TARGET_TYPE (t); | |
2362 | } | |
2363 | ||
c5aa993b | 2364 | if (TYPE_CODE (t) != TYPE_CODE_STRUCT |
c906108c | 2365 | && TYPE_CODE (t) != TYPE_CODE_UNION) |
8a3fe4f8 | 2366 | error (_("Internal error: `this' is not an aggregate")); |
c906108c SS |
2367 | |
2368 | return check_field_in (t, name); | |
2369 | } | |
2370 | ||
79c2c32d | 2371 | /* C++: Given an aggregate type CURTYPE, and a member name NAME, |
0d5de010 DJ |
2372 | return the appropriate member (or the address of the member, if |
2373 | WANT_ADDRESS). This function is used to resolve user expressions | |
2374 | of the form "DOMAIN::NAME". For more details on what happens, see | |
2375 | the comment before value_struct_elt_for_reference. */ | |
79c2c32d DC |
2376 | |
2377 | struct value * | |
2378 | value_aggregate_elt (struct type *curtype, | |
0d5de010 | 2379 | char *name, int want_address, |
79c2c32d DC |
2380 | enum noside noside) |
2381 | { | |
2382 | switch (TYPE_CODE (curtype)) | |
2383 | { | |
2384 | case TYPE_CODE_STRUCT: | |
2385 | case TYPE_CODE_UNION: | |
ac3eeb49 MS |
2386 | return value_struct_elt_for_reference (curtype, 0, curtype, |
2387 | name, NULL, | |
0d5de010 | 2388 | want_address, noside); |
79c2c32d | 2389 | case TYPE_CODE_NAMESPACE: |
ac3eeb49 MS |
2390 | return value_namespace_elt (curtype, name, |
2391 | want_address, noside); | |
79c2c32d DC |
2392 | default: |
2393 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 2394 | _("non-aggregate type in value_aggregate_elt")); |
79c2c32d DC |
2395 | } |
2396 | } | |
2397 | ||
c906108c | 2398 | /* C++: Given an aggregate type CURTYPE, and a member name NAME, |
ac3eeb49 MS |
2399 | return the address of this member as a "pointer to member" type. |
2400 | If INTYPE is non-null, then it will be the type of the member we | |
2401 | are looking for. This will help us resolve "pointers to member | |
2402 | functions". This function is used to resolve user expressions of | |
2403 | the form "DOMAIN::NAME". */ | |
c906108c | 2404 | |
63d06c5c | 2405 | static struct value * |
fba45db2 KB |
2406 | value_struct_elt_for_reference (struct type *domain, int offset, |
2407 | struct type *curtype, char *name, | |
ac3eeb49 MS |
2408 | struct type *intype, |
2409 | int want_address, | |
63d06c5c | 2410 | enum noside noside) |
c906108c | 2411 | { |
52f0bd74 AC |
2412 | struct type *t = curtype; |
2413 | int i; | |
0d5de010 | 2414 | struct value *v, *result; |
c906108c | 2415 | |
c5aa993b | 2416 | if (TYPE_CODE (t) != TYPE_CODE_STRUCT |
c906108c | 2417 | && TYPE_CODE (t) != TYPE_CODE_UNION) |
8a3fe4f8 | 2418 | error (_("Internal error: non-aggregate type to value_struct_elt_for_reference")); |
c906108c SS |
2419 | |
2420 | for (i = TYPE_NFIELDS (t) - 1; i >= TYPE_N_BASECLASSES (t); i--) | |
2421 | { | |
2422 | char *t_field_name = TYPE_FIELD_NAME (t, i); | |
c5aa993b | 2423 | |
6314a349 | 2424 | if (t_field_name && strcmp (t_field_name, name) == 0) |
c906108c SS |
2425 | { |
2426 | if (TYPE_FIELD_STATIC (t, i)) | |
2427 | { | |
2428 | v = value_static_field (t, i); | |
2429 | if (v == NULL) | |
8a3fe4f8 | 2430 | error (_("static field %s has been optimized out"), |
c906108c | 2431 | name); |
0d5de010 DJ |
2432 | if (want_address) |
2433 | v = value_addr (v); | |
c906108c SS |
2434 | return v; |
2435 | } | |
2436 | if (TYPE_FIELD_PACKED (t, i)) | |
8a3fe4f8 | 2437 | error (_("pointers to bitfield members not allowed")); |
c5aa993b | 2438 | |
0d5de010 DJ |
2439 | if (want_address) |
2440 | return value_from_longest | |
2441 | (lookup_memberptr_type (TYPE_FIELD_TYPE (t, i), domain), | |
2442 | offset + (LONGEST) (TYPE_FIELD_BITPOS (t, i) >> 3)); | |
2443 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
2444 | return allocate_value (TYPE_FIELD_TYPE (t, i)); | |
2445 | else | |
2446 | error (_("Cannot reference non-static field \"%s\""), name); | |
c906108c SS |
2447 | } |
2448 | } | |
2449 | ||
ac3eeb49 MS |
2450 | /* C++: If it was not found as a data field, then try to return it |
2451 | as a pointer to a method. */ | |
c906108c SS |
2452 | |
2453 | /* Destructors are a special case. */ | |
2454 | if (destructor_name_p (name, t)) | |
2455 | { | |
8a3fe4f8 | 2456 | error (_("member pointers to destructors not implemented yet")); |
c906108c SS |
2457 | } |
2458 | ||
2459 | /* Perform all necessary dereferencing. */ | |
2460 | while (intype && TYPE_CODE (intype) == TYPE_CODE_PTR) | |
2461 | intype = TYPE_TARGET_TYPE (intype); | |
2462 | ||
2463 | for (i = TYPE_NFN_FIELDS (t) - 1; i >= 0; --i) | |
2464 | { | |
2465 | char *t_field_name = TYPE_FN_FIELDLIST_NAME (t, i); | |
2466 | char dem_opname[64]; | |
2467 | ||
ac3eeb49 MS |
2468 | if (strncmp (t_field_name, "__", 2) == 0 |
2469 | || strncmp (t_field_name, "op", 2) == 0 | |
2470 | || strncmp (t_field_name, "type", 4) == 0) | |
c906108c | 2471 | { |
ac3eeb49 MS |
2472 | if (cplus_demangle_opname (t_field_name, |
2473 | dem_opname, DMGL_ANSI)) | |
c5aa993b | 2474 | t_field_name = dem_opname; |
ac3eeb49 MS |
2475 | else if (cplus_demangle_opname (t_field_name, |
2476 | dem_opname, 0)) | |
c906108c | 2477 | t_field_name = dem_opname; |
c906108c | 2478 | } |
6314a349 | 2479 | if (t_field_name && strcmp (t_field_name, name) == 0) |
c906108c SS |
2480 | { |
2481 | int j = TYPE_FN_FIELDLIST_LENGTH (t, i); | |
2482 | struct fn_field *f = TYPE_FN_FIELDLIST1 (t, i); | |
c5aa993b | 2483 | |
de17c821 DJ |
2484 | check_stub_method_group (t, i); |
2485 | ||
c906108c | 2486 | if (intype == 0 && j > 1) |
8a3fe4f8 | 2487 | error (_("non-unique member `%s' requires type instantiation"), name); |
c906108c SS |
2488 | if (intype) |
2489 | { | |
2490 | while (j--) | |
2491 | if (TYPE_FN_FIELD_TYPE (f, j) == intype) | |
2492 | break; | |
2493 | if (j < 0) | |
8a3fe4f8 | 2494 | error (_("no member function matches that type instantiation")); |
c906108c SS |
2495 | } |
2496 | else | |
2497 | j = 0; | |
c5aa993b | 2498 | |
0d5de010 DJ |
2499 | if (TYPE_FN_FIELD_STATIC_P (f, j)) |
2500 | { | |
ac3eeb49 MS |
2501 | struct symbol *s = |
2502 | lookup_symbol (TYPE_FN_FIELD_PHYSNAME (f, j), | |
2503 | 0, VAR_DOMAIN, 0, NULL); | |
0d5de010 DJ |
2504 | if (s == NULL) |
2505 | return NULL; | |
2506 | ||
2507 | if (want_address) | |
2508 | return value_addr (read_var_value (s, 0)); | |
2509 | else | |
2510 | return read_var_value (s, 0); | |
2511 | } | |
2512 | ||
c906108c SS |
2513 | if (TYPE_FN_FIELD_VIRTUAL_P (f, j)) |
2514 | { | |
0d5de010 DJ |
2515 | if (want_address) |
2516 | { | |
2517 | result = allocate_value | |
2518 | (lookup_methodptr_type (TYPE_FN_FIELD_TYPE (f, j))); | |
2519 | cplus_make_method_ptr (value_contents_writeable (result), | |
2520 | TYPE_FN_FIELD_VOFFSET (f, j), 1); | |
2521 | } | |
2522 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
2523 | return allocate_value (TYPE_FN_FIELD_TYPE (f, j)); | |
2524 | else | |
2525 | error (_("Cannot reference virtual member function \"%s\""), | |
2526 | name); | |
c906108c SS |
2527 | } |
2528 | else | |
2529 | { | |
ac3eeb49 MS |
2530 | struct symbol *s = |
2531 | lookup_symbol (TYPE_FN_FIELD_PHYSNAME (f, j), | |
2532 | 0, VAR_DOMAIN, 0, NULL); | |
c906108c | 2533 | if (s == NULL) |
0d5de010 DJ |
2534 | return NULL; |
2535 | ||
2536 | v = read_var_value (s, 0); | |
2537 | if (!want_address) | |
2538 | result = v; | |
c906108c SS |
2539 | else |
2540 | { | |
0d5de010 DJ |
2541 | result = allocate_value (lookup_methodptr_type (TYPE_FN_FIELD_TYPE (f, j))); |
2542 | cplus_make_method_ptr (value_contents_writeable (result), | |
2543 | VALUE_ADDRESS (v), 0); | |
c906108c | 2544 | } |
c906108c | 2545 | } |
0d5de010 | 2546 | return result; |
c906108c SS |
2547 | } |
2548 | } | |
2549 | for (i = TYPE_N_BASECLASSES (t) - 1; i >= 0; i--) | |
2550 | { | |
f23631e4 | 2551 | struct value *v; |
c906108c SS |
2552 | int base_offset; |
2553 | ||
2554 | if (BASETYPE_VIA_VIRTUAL (t, i)) | |
2555 | base_offset = 0; | |
2556 | else | |
2557 | base_offset = TYPE_BASECLASS_BITPOS (t, i) / 8; | |
2558 | v = value_struct_elt_for_reference (domain, | |
2559 | offset + base_offset, | |
2560 | TYPE_BASECLASS (t, i), | |
ac3eeb49 MS |
2561 | name, intype, |
2562 | want_address, noside); | |
c906108c SS |
2563 | if (v) |
2564 | return v; | |
2565 | } | |
63d06c5c DC |
2566 | |
2567 | /* As a last chance, pretend that CURTYPE is a namespace, and look | |
2568 | it up that way; this (frequently) works for types nested inside | |
2569 | classes. */ | |
2570 | ||
ac3eeb49 MS |
2571 | return value_maybe_namespace_elt (curtype, name, |
2572 | want_address, noside); | |
c906108c SS |
2573 | } |
2574 | ||
79c2c32d DC |
2575 | /* C++: Return the member NAME of the namespace given by the type |
2576 | CURTYPE. */ | |
2577 | ||
2578 | static struct value * | |
2579 | value_namespace_elt (const struct type *curtype, | |
0d5de010 | 2580 | char *name, int want_address, |
79c2c32d | 2581 | enum noside noside) |
63d06c5c DC |
2582 | { |
2583 | struct value *retval = value_maybe_namespace_elt (curtype, name, | |
ac3eeb49 MS |
2584 | want_address, |
2585 | noside); | |
63d06c5c DC |
2586 | |
2587 | if (retval == NULL) | |
ac3eeb49 MS |
2588 | error (_("No symbol \"%s\" in namespace \"%s\"."), |
2589 | name, TYPE_TAG_NAME (curtype)); | |
63d06c5c DC |
2590 | |
2591 | return retval; | |
2592 | } | |
2593 | ||
2594 | /* A helper function used by value_namespace_elt and | |
2595 | value_struct_elt_for_reference. It looks up NAME inside the | |
2596 | context CURTYPE; this works if CURTYPE is a namespace or if CURTYPE | |
2597 | is a class and NAME refers to a type in CURTYPE itself (as opposed | |
2598 | to, say, some base class of CURTYPE). */ | |
2599 | ||
2600 | static struct value * | |
2601 | value_maybe_namespace_elt (const struct type *curtype, | |
0d5de010 | 2602 | char *name, int want_address, |
63d06c5c | 2603 | enum noside noside) |
79c2c32d DC |
2604 | { |
2605 | const char *namespace_name = TYPE_TAG_NAME (curtype); | |
2606 | struct symbol *sym; | |
0d5de010 | 2607 | struct value *result; |
79c2c32d DC |
2608 | |
2609 | sym = cp_lookup_symbol_namespace (namespace_name, name, NULL, | |
ac3eeb49 MS |
2610 | get_selected_block (0), |
2611 | VAR_DOMAIN, NULL); | |
79c2c32d DC |
2612 | |
2613 | if (sym == NULL) | |
63d06c5c | 2614 | return NULL; |
79c2c32d DC |
2615 | else if ((noside == EVAL_AVOID_SIDE_EFFECTS) |
2616 | && (SYMBOL_CLASS (sym) == LOC_TYPEDEF)) | |
0d5de010 | 2617 | result = allocate_value (SYMBOL_TYPE (sym)); |
79c2c32d | 2618 | else |
0d5de010 DJ |
2619 | result = value_of_variable (sym, get_selected_block (0)); |
2620 | ||
2621 | if (result && want_address) | |
2622 | result = value_addr (result); | |
2623 | ||
2624 | return result; | |
79c2c32d DC |
2625 | } |
2626 | ||
ac3eeb49 MS |
2627 | /* Given a pointer value V, find the real (RTTI) type of the object it |
2628 | points to. | |
2629 | ||
c906108c | 2630 | Other parameters FULL, TOP, USING_ENC as with value_rtti_type() |
ac3eeb49 | 2631 | and refer to the values computed for the object pointed to. */ |
c906108c SS |
2632 | |
2633 | struct type * | |
ac3eeb49 MS |
2634 | value_rtti_target_type (struct value *v, int *full, |
2635 | int *top, int *using_enc) | |
c906108c | 2636 | { |
f23631e4 | 2637 | struct value *target; |
c906108c SS |
2638 | |
2639 | target = value_ind (v); | |
2640 | ||
2641 | return value_rtti_type (target, full, top, using_enc); | |
2642 | } | |
2643 | ||
2644 | /* Given a value pointed to by ARGP, check its real run-time type, and | |
2645 | if that is different from the enclosing type, create a new value | |
2646 | using the real run-time type as the enclosing type (and of the same | |
2647 | type as ARGP) and return it, with the embedded offset adjusted to | |
ac3eeb49 MS |
2648 | be the correct offset to the enclosed object. RTYPE is the type, |
2649 | and XFULL, XTOP, and XUSING_ENC are the other parameters, computed | |
2650 | by value_rtti_type(). If these are available, they can be supplied | |
2651 | and a second call to value_rtti_type() is avoided. (Pass RTYPE == | |
2652 | NULL if they're not available. */ | |
c906108c | 2653 | |
f23631e4 | 2654 | struct value * |
ac3eeb49 MS |
2655 | value_full_object (struct value *argp, |
2656 | struct type *rtype, | |
2657 | int xfull, int xtop, | |
fba45db2 | 2658 | int xusing_enc) |
c906108c | 2659 | { |
c5aa993b | 2660 | struct type *real_type; |
c906108c SS |
2661 | int full = 0; |
2662 | int top = -1; | |
2663 | int using_enc = 0; | |
f23631e4 | 2664 | struct value *new_val; |
c906108c SS |
2665 | |
2666 | if (rtype) | |
2667 | { | |
2668 | real_type = rtype; | |
2669 | full = xfull; | |
2670 | top = xtop; | |
2671 | using_enc = xusing_enc; | |
2672 | } | |
2673 | else | |
2674 | real_type = value_rtti_type (argp, &full, &top, &using_enc); | |
2675 | ||
ac3eeb49 | 2676 | /* If no RTTI data, or if object is already complete, do nothing. */ |
4754a64e | 2677 | if (!real_type || real_type == value_enclosing_type (argp)) |
c906108c SS |
2678 | return argp; |
2679 | ||
2680 | /* If we have the full object, but for some reason the enclosing | |
ac3eeb49 MS |
2681 | type is wrong, set it. */ |
2682 | /* pai: FIXME -- sounds iffy */ | |
c906108c SS |
2683 | if (full) |
2684 | { | |
2b127877 | 2685 | argp = value_change_enclosing_type (argp, real_type); |
c906108c SS |
2686 | return argp; |
2687 | } | |
2688 | ||
2689 | /* Check if object is in memory */ | |
2690 | if (VALUE_LVAL (argp) != lval_memory) | |
2691 | { | |
ac3eeb49 MS |
2692 | warning (_("Couldn't retrieve complete object of RTTI type %s; object may be in register(s)."), |
2693 | TYPE_NAME (real_type)); | |
c5aa993b | 2694 | |
c906108c SS |
2695 | return argp; |
2696 | } | |
c5aa993b | 2697 | |
ac3eeb49 MS |
2698 | /* All other cases -- retrieve the complete object. */ |
2699 | /* Go back by the computed top_offset from the beginning of the | |
2700 | object, adjusting for the embedded offset of argp if that's what | |
2701 | value_rtti_type used for its computation. */ | |
c906108c | 2702 | new_val = value_at_lazy (real_type, VALUE_ADDRESS (argp) - top + |
13c3b5f5 | 2703 | (using_enc ? 0 : value_embedded_offset (argp))); |
04624583 | 2704 | deprecated_set_value_type (new_val, value_type (argp)); |
13c3b5f5 AC |
2705 | set_value_embedded_offset (new_val, (using_enc |
2706 | ? top + value_embedded_offset (argp) | |
2707 | : top)); | |
c906108c SS |
2708 | return new_val; |
2709 | } | |
2710 | ||
389e51db | 2711 | |
d069f99d | 2712 | /* Return the value of the local variable, if one exists. |
c906108c SS |
2713 | Flag COMPLAIN signals an error if the request is made in an |
2714 | inappropriate context. */ | |
2715 | ||
f23631e4 | 2716 | struct value * |
d069f99d | 2717 | value_of_local (const char *name, int complain) |
c906108c SS |
2718 | { |
2719 | struct symbol *func, *sym; | |
2720 | struct block *b; | |
d069f99d | 2721 | struct value * ret; |
206415a3 | 2722 | struct frame_info *frame; |
c906108c | 2723 | |
206415a3 DJ |
2724 | if (complain) |
2725 | frame = get_selected_frame (_("no frame selected")); | |
2726 | else | |
c906108c | 2727 | { |
206415a3 DJ |
2728 | frame = deprecated_safe_get_selected_frame (); |
2729 | if (frame == 0) | |
c5aa993b | 2730 | return 0; |
c906108c SS |
2731 | } |
2732 | ||
206415a3 | 2733 | func = get_frame_function (frame); |
c906108c SS |
2734 | if (!func) |
2735 | { | |
2736 | if (complain) | |
8a3fe4f8 | 2737 | error (_("no `%s' in nameless context"), name); |
c5aa993b JM |
2738 | else |
2739 | return 0; | |
c906108c SS |
2740 | } |
2741 | ||
2742 | b = SYMBOL_BLOCK_VALUE (func); | |
de4f826b | 2743 | if (dict_empty (BLOCK_DICT (b))) |
c906108c SS |
2744 | { |
2745 | if (complain) | |
8a3fe4f8 | 2746 | error (_("no args, no `%s'"), name); |
c5aa993b JM |
2747 | else |
2748 | return 0; | |
c906108c SS |
2749 | } |
2750 | ||
2751 | /* Calling lookup_block_symbol is necessary to get the LOC_REGISTER | |
2752 | symbol instead of the LOC_ARG one (if both exist). */ | |
176620f1 | 2753 | sym = lookup_block_symbol (b, name, NULL, VAR_DOMAIN); |
c906108c SS |
2754 | if (sym == NULL) |
2755 | { | |
2756 | if (complain) | |
ac3eeb49 MS |
2757 | error (_("current stack frame does not contain a variable named `%s'"), |
2758 | name); | |
c906108c SS |
2759 | else |
2760 | return NULL; | |
2761 | } | |
2762 | ||
206415a3 | 2763 | ret = read_var_value (sym, frame); |
d069f99d | 2764 | if (ret == 0 && complain) |
8a3fe4f8 | 2765 | error (_("`%s' argument unreadable"), name); |
d069f99d AF |
2766 | return ret; |
2767 | } | |
2768 | ||
2769 | /* C++/Objective-C: return the value of the class instance variable, | |
2770 | if one exists. Flag COMPLAIN signals an error if the request is | |
2771 | made in an inappropriate context. */ | |
2772 | ||
2773 | struct value * | |
2774 | value_of_this (int complain) | |
2775 | { | |
2776 | if (current_language->la_language == language_objc) | |
2777 | return value_of_local ("self", complain); | |
2778 | else | |
2779 | return value_of_local ("this", complain); | |
c906108c SS |
2780 | } |
2781 | ||
ac3eeb49 MS |
2782 | /* Create a slice (sub-string, sub-array) of ARRAY, that is LENGTH |
2783 | elements long, starting at LOWBOUND. The result has the same lower | |
2784 | bound as the original ARRAY. */ | |
c906108c | 2785 | |
f23631e4 AC |
2786 | struct value * |
2787 | value_slice (struct value *array, int lowbound, int length) | |
c906108c SS |
2788 | { |
2789 | struct type *slice_range_type, *slice_type, *range_type; | |
7a67d0fe | 2790 | LONGEST lowerbound, upperbound; |
f23631e4 | 2791 | struct value *slice; |
c906108c | 2792 | struct type *array_type; |
ac3eeb49 | 2793 | |
df407dfe | 2794 | array_type = check_typedef (value_type (array)); |
c906108c SS |
2795 | if (TYPE_CODE (array_type) != TYPE_CODE_ARRAY |
2796 | && TYPE_CODE (array_type) != TYPE_CODE_STRING | |
2797 | && TYPE_CODE (array_type) != TYPE_CODE_BITSTRING) | |
8a3fe4f8 | 2798 | error (_("cannot take slice of non-array")); |
ac3eeb49 | 2799 | |
c906108c SS |
2800 | range_type = TYPE_INDEX_TYPE (array_type); |
2801 | if (get_discrete_bounds (range_type, &lowerbound, &upperbound) < 0) | |
8a3fe4f8 | 2802 | error (_("slice from bad array or bitstring")); |
ac3eeb49 | 2803 | |
c906108c | 2804 | if (lowbound < lowerbound || length < 0 |
db034ac5 | 2805 | || lowbound + length - 1 > upperbound) |
8a3fe4f8 | 2806 | error (_("slice out of range")); |
ac3eeb49 | 2807 | |
c906108c SS |
2808 | /* FIXME-type-allocation: need a way to free this type when we are |
2809 | done with it. */ | |
c5aa993b | 2810 | slice_range_type = create_range_type ((struct type *) NULL, |
c906108c | 2811 | TYPE_TARGET_TYPE (range_type), |
ac3eeb49 MS |
2812 | lowbound, |
2813 | lowbound + length - 1); | |
c906108c SS |
2814 | if (TYPE_CODE (array_type) == TYPE_CODE_BITSTRING) |
2815 | { | |
2816 | int i; | |
ac3eeb49 MS |
2817 | |
2818 | slice_type = create_set_type ((struct type *) NULL, | |
2819 | slice_range_type); | |
c906108c SS |
2820 | TYPE_CODE (slice_type) = TYPE_CODE_BITSTRING; |
2821 | slice = value_zero (slice_type, not_lval); | |
ac3eeb49 | 2822 | |
c906108c SS |
2823 | for (i = 0; i < length; i++) |
2824 | { | |
2825 | int element = value_bit_index (array_type, | |
0fd88904 | 2826 | value_contents (array), |
c906108c SS |
2827 | lowbound + i); |
2828 | if (element < 0) | |
8a3fe4f8 | 2829 | error (_("internal error accessing bitstring")); |
c906108c SS |
2830 | else if (element > 0) |
2831 | { | |
2832 | int j = i % TARGET_CHAR_BIT; | |
32c9a795 | 2833 | if (gdbarch_bits_big_endian (current_gdbarch)) |
c906108c | 2834 | j = TARGET_CHAR_BIT - 1 - j; |
990a07ab | 2835 | value_contents_raw (slice)[i / TARGET_CHAR_BIT] |= (1 << j); |
c906108c SS |
2836 | } |
2837 | } | |
ac3eeb49 MS |
2838 | /* We should set the address, bitssize, and bitspos, so the |
2839 | slice can be used on the LHS, but that may require extensions | |
2840 | to value_assign. For now, just leave as a non_lval. | |
2841 | FIXME. */ | |
c906108c SS |
2842 | } |
2843 | else | |
2844 | { | |
2845 | struct type *element_type = TYPE_TARGET_TYPE (array_type); | |
ac3eeb49 MS |
2846 | LONGEST offset = |
2847 | (lowbound - lowerbound) * TYPE_LENGTH (check_typedef (element_type)); | |
2848 | ||
2849 | slice_type = create_array_type ((struct type *) NULL, | |
2850 | element_type, | |
c906108c SS |
2851 | slice_range_type); |
2852 | TYPE_CODE (slice_type) = TYPE_CODE (array_type); | |
ac3eeb49 | 2853 | |
c906108c | 2854 | slice = allocate_value (slice_type); |
d69fe07e | 2855 | if (value_lazy (array)) |
dfa52d88 | 2856 | set_value_lazy (slice, 1); |
c906108c | 2857 | else |
0fd88904 AC |
2858 | memcpy (value_contents_writeable (slice), |
2859 | value_contents (array) + offset, | |
c906108c | 2860 | TYPE_LENGTH (slice_type)); |
ac3eeb49 | 2861 | |
c906108c SS |
2862 | if (VALUE_LVAL (array) == lval_internalvar) |
2863 | VALUE_LVAL (slice) = lval_internalvar_component; | |
2864 | else | |
2865 | VALUE_LVAL (slice) = VALUE_LVAL (array); | |
ac3eeb49 | 2866 | |
c906108c | 2867 | VALUE_ADDRESS (slice) = VALUE_ADDRESS (array); |
65d3800a | 2868 | VALUE_FRAME_ID (slice) = VALUE_FRAME_ID (array); |
f5cf64a7 | 2869 | set_value_offset (slice, value_offset (array) + offset); |
c906108c SS |
2870 | } |
2871 | return slice; | |
2872 | } | |
2873 | ||
ac3eeb49 MS |
2874 | /* Create a value for a FORTRAN complex number. Currently most of the |
2875 | time values are coerced to COMPLEX*16 (i.e. a complex number | |
070ad9f0 DB |
2876 | composed of 2 doubles. This really should be a smarter routine |
2877 | that figures out precision inteligently as opposed to assuming | |
ac3eeb49 | 2878 | doubles. FIXME: fmb */ |
c906108c | 2879 | |
f23631e4 | 2880 | struct value * |
ac3eeb49 MS |
2881 | value_literal_complex (struct value *arg1, |
2882 | struct value *arg2, | |
2883 | struct type *type) | |
c906108c | 2884 | { |
f23631e4 | 2885 | struct value *val; |
c906108c SS |
2886 | struct type *real_type = TYPE_TARGET_TYPE (type); |
2887 | ||
2888 | val = allocate_value (type); | |
2889 | arg1 = value_cast (real_type, arg1); | |
2890 | arg2 = value_cast (real_type, arg2); | |
2891 | ||
990a07ab | 2892 | memcpy (value_contents_raw (val), |
0fd88904 | 2893 | value_contents (arg1), TYPE_LENGTH (real_type)); |
990a07ab | 2894 | memcpy (value_contents_raw (val) + TYPE_LENGTH (real_type), |
0fd88904 | 2895 | value_contents (arg2), TYPE_LENGTH (real_type)); |
c906108c SS |
2896 | return val; |
2897 | } | |
2898 | ||
ac3eeb49 | 2899 | /* Cast a value into the appropriate complex data type. */ |
c906108c | 2900 | |
f23631e4 AC |
2901 | static struct value * |
2902 | cast_into_complex (struct type *type, struct value *val) | |
c906108c SS |
2903 | { |
2904 | struct type *real_type = TYPE_TARGET_TYPE (type); | |
ac3eeb49 | 2905 | |
df407dfe | 2906 | if (TYPE_CODE (value_type (val)) == TYPE_CODE_COMPLEX) |
c906108c | 2907 | { |
df407dfe | 2908 | struct type *val_real_type = TYPE_TARGET_TYPE (value_type (val)); |
f23631e4 AC |
2909 | struct value *re_val = allocate_value (val_real_type); |
2910 | struct value *im_val = allocate_value (val_real_type); | |
c906108c | 2911 | |
990a07ab | 2912 | memcpy (value_contents_raw (re_val), |
0fd88904 | 2913 | value_contents (val), TYPE_LENGTH (val_real_type)); |
990a07ab | 2914 | memcpy (value_contents_raw (im_val), |
0fd88904 | 2915 | value_contents (val) + TYPE_LENGTH (val_real_type), |
c5aa993b | 2916 | TYPE_LENGTH (val_real_type)); |
c906108c SS |
2917 | |
2918 | return value_literal_complex (re_val, im_val, type); | |
2919 | } | |
df407dfe AC |
2920 | else if (TYPE_CODE (value_type (val)) == TYPE_CODE_FLT |
2921 | || TYPE_CODE (value_type (val)) == TYPE_CODE_INT) | |
ac3eeb49 MS |
2922 | return value_literal_complex (val, |
2923 | value_zero (real_type, not_lval), | |
2924 | type); | |
c906108c | 2925 | else |
8a3fe4f8 | 2926 | error (_("cannot cast non-number to complex")); |
c906108c SS |
2927 | } |
2928 | ||
2929 | void | |
fba45db2 | 2930 | _initialize_valops (void) |
c906108c | 2931 | { |
5bf193a2 AC |
2932 | add_setshow_boolean_cmd ("overload-resolution", class_support, |
2933 | &overload_resolution, _("\ | |
2934 | Set overload resolution in evaluating C++ functions."), _("\ | |
ac3eeb49 MS |
2935 | Show overload resolution in evaluating C++ functions."), |
2936 | NULL, NULL, | |
920d2a44 | 2937 | show_overload_resolution, |
5bf193a2 | 2938 | &setlist, &showlist); |
c906108c | 2939 | overload_resolution = 1; |
c906108c | 2940 | } |