Commit | Line | Data |
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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, | |
0fb0cc75 | 5 | 2008, 2009 Free Software Foundation, Inc. |
c906108c | 6 | |
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 12 | (at your option) any later version. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
c906108c | 18 | |
c5aa993b | 19 | You should have received a copy of the GNU General Public License |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
21 | |
22 | #include "defs.h" | |
23 | #include "symtab.h" | |
24 | #include "gdbtypes.h" | |
25 | #include "value.h" | |
26 | #include "frame.h" | |
27 | #include "inferior.h" | |
28 | #include "gdbcore.h" | |
29 | #include "target.h" | |
30 | #include "demangle.h" | |
31 | #include "language.h" | |
32 | #include "gdbcmd.h" | |
4e052eda | 33 | #include "regcache.h" |
015a42b4 | 34 | #include "cp-abi.h" |
fe898f56 | 35 | #include "block.h" |
04714b91 | 36 | #include "infcall.h" |
de4f826b | 37 | #include "dictionary.h" |
b6429628 | 38 | #include "cp-support.h" |
4ef30785 | 39 | #include "dfp.h" |
029a67e4 | 40 | #include "user-regs.h" |
c906108c SS |
41 | |
42 | #include <errno.h> | |
43 | #include "gdb_string.h" | |
4a1970e4 | 44 | #include "gdb_assert.h" |
79c2c32d | 45 | #include "cp-support.h" |
f4c5303c | 46 | #include "observer.h" |
3e3b026f UW |
47 | #include "objfiles.h" |
48 | #include "symtab.h" | |
c906108c | 49 | |
070ad9f0 | 50 | extern int overload_debug; |
c906108c SS |
51 | /* Local functions. */ |
52 | ||
ad2f7632 DJ |
53 | static int typecmp (int staticp, int varargs, int nargs, |
54 | struct field t1[], struct value *t2[]); | |
c906108c | 55 | |
ac3eeb49 MS |
56 | static struct value *search_struct_field (char *, struct value *, |
57 | int, struct type *, int); | |
c906108c | 58 | |
f23631e4 AC |
59 | static struct value *search_struct_method (char *, struct value **, |
60 | struct value **, | |
a14ed312 | 61 | int, int *, struct type *); |
c906108c | 62 | |
ac3eeb49 MS |
63 | static int find_oload_champ_namespace (struct type **, int, |
64 | const char *, const char *, | |
65 | struct symbol ***, | |
66 | struct badness_vector **); | |
8d577d32 DC |
67 | |
68 | static | |
ac3eeb49 MS |
69 | int find_oload_champ_namespace_loop (struct type **, int, |
70 | const char *, const char *, | |
71 | int, struct symbol ***, | |
72 | struct badness_vector **, int *); | |
73 | ||
74 | static int find_oload_champ (struct type **, int, int, int, | |
75 | struct fn_field *, struct symbol **, | |
76 | struct badness_vector **); | |
77 | ||
78 | static int oload_method_static (int, struct fn_field *, int); | |
8d577d32 DC |
79 | |
80 | enum oload_classification { STANDARD, NON_STANDARD, INCOMPATIBLE }; | |
81 | ||
82 | static enum | |
ac3eeb49 MS |
83 | oload_classification classify_oload_match (struct badness_vector *, |
84 | int, int); | |
8d577d32 | 85 | |
ac3eeb49 MS |
86 | static struct value *value_struct_elt_for_reference (struct type *, |
87 | int, struct type *, | |
88 | char *, | |
89 | struct type *, | |
90 | int, enum noside); | |
79c2c32d | 91 | |
ac3eeb49 MS |
92 | static struct value *value_namespace_elt (const struct type *, |
93 | char *, int , enum noside); | |
79c2c32d | 94 | |
ac3eeb49 MS |
95 | static struct value *value_maybe_namespace_elt (const struct type *, |
96 | char *, int, | |
97 | enum noside); | |
63d06c5c | 98 | |
a14ed312 | 99 | static CORE_ADDR allocate_space_in_inferior (int); |
c906108c | 100 | |
f23631e4 | 101 | static struct value *cast_into_complex (struct type *, struct value *); |
c906108c | 102 | |
ac3eeb49 MS |
103 | static struct fn_field *find_method_list (struct value **, char *, |
104 | int, struct type *, int *, | |
105 | struct type **, int *); | |
7a292a7a | 106 | |
a14ed312 | 107 | void _initialize_valops (void); |
c906108c | 108 | |
c906108c | 109 | #if 0 |
ac3eeb49 MS |
110 | /* Flag for whether we want to abandon failed expression evals by |
111 | default. */ | |
112 | ||
c906108c SS |
113 | static int auto_abandon = 0; |
114 | #endif | |
115 | ||
116 | int overload_resolution = 0; | |
920d2a44 AC |
117 | static void |
118 | show_overload_resolution (struct ui_file *file, int from_tty, | |
ac3eeb49 MS |
119 | struct cmd_list_element *c, |
120 | const char *value) | |
920d2a44 AC |
121 | { |
122 | fprintf_filtered (file, _("\ | |
123 | Overload resolution in evaluating C++ functions is %s.\n"), | |
124 | value); | |
125 | } | |
242bfc55 | 126 | |
3e3b026f UW |
127 | /* Find the address of function name NAME in the inferior. If OBJF_P |
128 | is non-NULL, *OBJF_P will be set to the OBJFILE where the function | |
129 | is defined. */ | |
c906108c | 130 | |
f23631e4 | 131 | struct value * |
3e3b026f | 132 | find_function_in_inferior (const char *name, struct objfile **objf_p) |
c906108c | 133 | { |
52f0bd74 | 134 | struct symbol *sym; |
2570f2b7 | 135 | sym = lookup_symbol (name, 0, VAR_DOMAIN, 0); |
c906108c SS |
136 | if (sym != NULL) |
137 | { | |
138 | if (SYMBOL_CLASS (sym) != LOC_BLOCK) | |
139 | { | |
8a3fe4f8 | 140 | error (_("\"%s\" exists in this program but is not a function."), |
c906108c SS |
141 | name); |
142 | } | |
3e3b026f UW |
143 | |
144 | if (objf_p) | |
145 | *objf_p = SYMBOL_SYMTAB (sym)->objfile; | |
146 | ||
c906108c SS |
147 | return value_of_variable (sym, NULL); |
148 | } | |
149 | else | |
150 | { | |
ac3eeb49 MS |
151 | struct minimal_symbol *msymbol = |
152 | lookup_minimal_symbol (name, NULL, NULL); | |
c906108c SS |
153 | if (msymbol != NULL) |
154 | { | |
3e3b026f UW |
155 | struct objfile *objfile = msymbol_objfile (msymbol); |
156 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
157 | ||
c906108c | 158 | struct type *type; |
4478b372 | 159 | CORE_ADDR maddr; |
3e3b026f | 160 | type = lookup_pointer_type (builtin_type (gdbarch)->builtin_char); |
c906108c SS |
161 | type = lookup_function_type (type); |
162 | type = lookup_pointer_type (type); | |
4478b372 | 163 | maddr = SYMBOL_VALUE_ADDRESS (msymbol); |
3e3b026f UW |
164 | |
165 | if (objf_p) | |
166 | *objf_p = objfile; | |
167 | ||
4478b372 | 168 | return value_from_pointer (type, maddr); |
c906108c SS |
169 | } |
170 | else | |
171 | { | |
c5aa993b | 172 | if (!target_has_execution) |
8a3fe4f8 | 173 | error (_("evaluation of this expression requires the target program to be active")); |
c5aa993b | 174 | else |
8a3fe4f8 | 175 | error (_("evaluation of this expression requires the program to have a function \"%s\"."), name); |
c906108c SS |
176 | } |
177 | } | |
178 | } | |
179 | ||
ac3eeb49 MS |
180 | /* Allocate NBYTES of space in the inferior using the inferior's |
181 | malloc and return a value that is a pointer to the allocated | |
182 | space. */ | |
c906108c | 183 | |
f23631e4 | 184 | struct value * |
fba45db2 | 185 | value_allocate_space_in_inferior (int len) |
c906108c | 186 | { |
3e3b026f UW |
187 | struct objfile *objf; |
188 | struct value *val = find_function_in_inferior ("malloc", &objf); | |
189 | struct gdbarch *gdbarch = get_objfile_arch (objf); | |
f23631e4 | 190 | struct value *blocklen; |
c906108c | 191 | |
3e3b026f | 192 | blocklen = value_from_longest (builtin_type (gdbarch)->builtin_int, len); |
c906108c SS |
193 | val = call_function_by_hand (val, 1, &blocklen); |
194 | if (value_logical_not (val)) | |
195 | { | |
196 | if (!target_has_execution) | |
8a3fe4f8 | 197 | error (_("No memory available to program now: you need to start the target first")); |
c5aa993b | 198 | else |
8a3fe4f8 | 199 | error (_("No memory available to program: call to malloc failed")); |
c906108c SS |
200 | } |
201 | return val; | |
202 | } | |
203 | ||
204 | static CORE_ADDR | |
fba45db2 | 205 | allocate_space_in_inferior (int len) |
c906108c SS |
206 | { |
207 | return value_as_long (value_allocate_space_in_inferior (len)); | |
208 | } | |
209 | ||
6af87b03 AR |
210 | /* Cast struct value VAL to type TYPE and return as a value. |
211 | Both type and val must be of TYPE_CODE_STRUCT or TYPE_CODE_UNION | |
694182d2 DJ |
212 | for this to work. Typedef to one of the codes is permitted. |
213 | Returns NULL if the cast is neither an upcast nor a downcast. */ | |
6af87b03 AR |
214 | |
215 | static struct value * | |
216 | value_cast_structs (struct type *type, struct value *v2) | |
217 | { | |
218 | struct type *t1; | |
219 | struct type *t2; | |
220 | struct value *v; | |
221 | ||
222 | gdb_assert (type != NULL && v2 != NULL); | |
223 | ||
224 | t1 = check_typedef (type); | |
225 | t2 = check_typedef (value_type (v2)); | |
226 | ||
227 | /* Check preconditions. */ | |
228 | gdb_assert ((TYPE_CODE (t1) == TYPE_CODE_STRUCT | |
229 | || TYPE_CODE (t1) == TYPE_CODE_UNION) | |
230 | && !!"Precondition is that type is of STRUCT or UNION kind."); | |
231 | gdb_assert ((TYPE_CODE (t2) == TYPE_CODE_STRUCT | |
232 | || TYPE_CODE (t2) == TYPE_CODE_UNION) | |
233 | && !!"Precondition is that value is of STRUCT or UNION kind"); | |
234 | ||
235 | /* Upcasting: look in the type of the source to see if it contains the | |
236 | type of the target as a superclass. If so, we'll need to | |
237 | offset the pointer rather than just change its type. */ | |
238 | if (TYPE_NAME (t1) != NULL) | |
239 | { | |
240 | v = search_struct_field (type_name_no_tag (t1), | |
241 | v2, 0, t2, 1); | |
242 | if (v) | |
243 | return v; | |
244 | } | |
245 | ||
246 | /* Downcasting: look in the type of the target to see if it contains the | |
247 | type of the source as a superclass. If so, we'll need to | |
248 | offset the pointer rather than just change its type. | |
249 | FIXME: This fails silently with virtual inheritance. */ | |
250 | if (TYPE_NAME (t2) != NULL) | |
251 | { | |
252 | v = search_struct_field (type_name_no_tag (t2), | |
253 | value_zero (t1, not_lval), 0, t1, 1); | |
254 | if (v) | |
255 | { | |
256 | /* Downcasting is possible (t1 is superclass of v2). */ | |
42ae5230 TT |
257 | CORE_ADDR addr2 = value_address (v2); |
258 | addr2 -= value_address (v) + value_embedded_offset (v); | |
6af87b03 AR |
259 | return value_at (type, addr2); |
260 | } | |
261 | } | |
694182d2 DJ |
262 | |
263 | return NULL; | |
6af87b03 AR |
264 | } |
265 | ||
fb933624 DJ |
266 | /* Cast one pointer or reference type to another. Both TYPE and |
267 | the type of ARG2 should be pointer types, or else both should be | |
268 | reference types. Returns the new pointer or reference. */ | |
269 | ||
270 | struct value * | |
271 | value_cast_pointers (struct type *type, struct value *arg2) | |
272 | { | |
6af87b03 | 273 | struct type *type1 = check_typedef (type); |
fb933624 DJ |
274 | struct type *type2 = check_typedef (value_type (arg2)); |
275 | struct type *t1 = check_typedef (TYPE_TARGET_TYPE (type)); | |
276 | struct type *t2 = check_typedef (TYPE_TARGET_TYPE (type2)); | |
277 | ||
278 | if (TYPE_CODE (t1) == TYPE_CODE_STRUCT | |
279 | && TYPE_CODE (t2) == TYPE_CODE_STRUCT | |
280 | && !value_logical_not (arg2)) | |
281 | { | |
6af87b03 | 282 | struct value *v2; |
fb933624 | 283 | |
6af87b03 AR |
284 | if (TYPE_CODE (type2) == TYPE_CODE_REF) |
285 | v2 = coerce_ref (arg2); | |
286 | else | |
287 | v2 = value_ind (arg2); | |
680b56ce | 288 | gdb_assert (TYPE_CODE (check_typedef (value_type (v2))) == TYPE_CODE_STRUCT |
6af87b03 AR |
289 | && !!"Why did coercion fail?"); |
290 | v2 = value_cast_structs (t1, v2); | |
291 | /* At this point we have what we can have, un-dereference if needed. */ | |
292 | if (v2) | |
fb933624 | 293 | { |
6af87b03 AR |
294 | struct value *v = value_addr (v2); |
295 | deprecated_set_value_type (v, type); | |
296 | return v; | |
fb933624 | 297 | } |
6af87b03 | 298 | } |
fb933624 DJ |
299 | |
300 | /* No superclass found, just change the pointer type. */ | |
0d5de010 | 301 | arg2 = value_copy (arg2); |
fb933624 DJ |
302 | deprecated_set_value_type (arg2, type); |
303 | arg2 = value_change_enclosing_type (arg2, type); | |
304 | set_value_pointed_to_offset (arg2, 0); /* pai: chk_val */ | |
305 | return arg2; | |
306 | } | |
307 | ||
c906108c SS |
308 | /* Cast value ARG2 to type TYPE and return as a value. |
309 | More general than a C cast: accepts any two types of the same length, | |
310 | and if ARG2 is an lvalue it can be cast into anything at all. */ | |
311 | /* In C++, casts may change pointer or object representations. */ | |
312 | ||
f23631e4 AC |
313 | struct value * |
314 | value_cast (struct type *type, struct value *arg2) | |
c906108c | 315 | { |
52f0bd74 AC |
316 | enum type_code code1; |
317 | enum type_code code2; | |
318 | int scalar; | |
c906108c SS |
319 | struct type *type2; |
320 | ||
321 | int convert_to_boolean = 0; | |
c5aa993b | 322 | |
df407dfe | 323 | if (value_type (arg2) == type) |
c906108c SS |
324 | return arg2; |
325 | ||
6af87b03 AR |
326 | code1 = TYPE_CODE (check_typedef (type)); |
327 | ||
328 | /* Check if we are casting struct reference to struct reference. */ | |
329 | if (code1 == TYPE_CODE_REF) | |
330 | { | |
331 | /* We dereference type; then we recurse and finally | |
332 | we generate value of the given reference. Nothing wrong with | |
333 | that. */ | |
334 | struct type *t1 = check_typedef (type); | |
335 | struct type *dereftype = check_typedef (TYPE_TARGET_TYPE (t1)); | |
336 | struct value *val = value_cast (dereftype, arg2); | |
337 | return value_ref (val); | |
338 | } | |
339 | ||
340 | code2 = TYPE_CODE (check_typedef (value_type (arg2))); | |
341 | ||
342 | if (code2 == TYPE_CODE_REF) | |
343 | /* We deref the value and then do the cast. */ | |
344 | return value_cast (type, coerce_ref (arg2)); | |
345 | ||
c906108c SS |
346 | CHECK_TYPEDEF (type); |
347 | code1 = TYPE_CODE (type); | |
994b9211 | 348 | arg2 = coerce_ref (arg2); |
df407dfe | 349 | type2 = check_typedef (value_type (arg2)); |
c906108c | 350 | |
fb933624 DJ |
351 | /* You can't cast to a reference type. See value_cast_pointers |
352 | instead. */ | |
353 | gdb_assert (code1 != TYPE_CODE_REF); | |
354 | ||
ac3eeb49 MS |
355 | /* A cast to an undetermined-length array_type, such as |
356 | (TYPE [])OBJECT, is treated like a cast to (TYPE [N])OBJECT, | |
357 | where N is sizeof(OBJECT)/sizeof(TYPE). */ | |
c906108c SS |
358 | if (code1 == TYPE_CODE_ARRAY) |
359 | { | |
360 | struct type *element_type = TYPE_TARGET_TYPE (type); | |
361 | unsigned element_length = TYPE_LENGTH (check_typedef (element_type)); | |
d78df370 | 362 | if (element_length > 0 && TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type)) |
c906108c SS |
363 | { |
364 | struct type *range_type = TYPE_INDEX_TYPE (type); | |
365 | int val_length = TYPE_LENGTH (type2); | |
366 | LONGEST low_bound, high_bound, new_length; | |
367 | if (get_discrete_bounds (range_type, &low_bound, &high_bound) < 0) | |
368 | low_bound = 0, high_bound = 0; | |
369 | new_length = val_length / element_length; | |
370 | if (val_length % element_length != 0) | |
8a3fe4f8 | 371 | warning (_("array element type size does not divide object size in cast")); |
ac3eeb49 MS |
372 | /* FIXME-type-allocation: need a way to free this type when |
373 | we are done with it. */ | |
c906108c SS |
374 | range_type = create_range_type ((struct type *) NULL, |
375 | TYPE_TARGET_TYPE (range_type), | |
376 | low_bound, | |
377 | new_length + low_bound - 1); | |
ac3eeb49 MS |
378 | deprecated_set_value_type (arg2, |
379 | create_array_type ((struct type *) NULL, | |
380 | element_type, | |
381 | range_type)); | |
c906108c SS |
382 | return arg2; |
383 | } | |
384 | } | |
385 | ||
386 | if (current_language->c_style_arrays | |
387 | && TYPE_CODE (type2) == TYPE_CODE_ARRAY) | |
388 | arg2 = value_coerce_array (arg2); | |
389 | ||
390 | if (TYPE_CODE (type2) == TYPE_CODE_FUNC) | |
391 | arg2 = value_coerce_function (arg2); | |
392 | ||
df407dfe | 393 | type2 = check_typedef (value_type (arg2)); |
c906108c SS |
394 | code2 = TYPE_CODE (type2); |
395 | ||
396 | if (code1 == TYPE_CODE_COMPLEX) | |
397 | return cast_into_complex (type, arg2); | |
398 | if (code1 == TYPE_CODE_BOOL) | |
399 | { | |
400 | code1 = TYPE_CODE_INT; | |
401 | convert_to_boolean = 1; | |
402 | } | |
403 | if (code1 == TYPE_CODE_CHAR) | |
404 | code1 = TYPE_CODE_INT; | |
405 | if (code2 == TYPE_CODE_BOOL || code2 == TYPE_CODE_CHAR) | |
406 | code2 = TYPE_CODE_INT; | |
407 | ||
408 | scalar = (code2 == TYPE_CODE_INT || code2 == TYPE_CODE_FLT | |
4ef30785 TJB |
409 | || code2 == TYPE_CODE_DECFLOAT || code2 == TYPE_CODE_ENUM |
410 | || code2 == TYPE_CODE_RANGE); | |
c906108c | 411 | |
6af87b03 AR |
412 | if ((code1 == TYPE_CODE_STRUCT || code1 == TYPE_CODE_UNION) |
413 | && (code2 == TYPE_CODE_STRUCT || code2 == TYPE_CODE_UNION) | |
c906108c | 414 | && TYPE_NAME (type) != 0) |
694182d2 DJ |
415 | { |
416 | struct value *v = value_cast_structs (type, arg2); | |
417 | if (v) | |
418 | return v; | |
419 | } | |
420 | ||
c906108c SS |
421 | if (code1 == TYPE_CODE_FLT && scalar) |
422 | return value_from_double (type, value_as_double (arg2)); | |
4ef30785 TJB |
423 | else if (code1 == TYPE_CODE_DECFLOAT && scalar) |
424 | { | |
425 | int dec_len = TYPE_LENGTH (type); | |
426 | gdb_byte dec[16]; | |
427 | ||
428 | if (code2 == TYPE_CODE_FLT) | |
429 | decimal_from_floating (arg2, dec, dec_len); | |
430 | else if (code2 == TYPE_CODE_DECFLOAT) | |
431 | decimal_convert (value_contents (arg2), TYPE_LENGTH (type2), | |
432 | dec, dec_len); | |
433 | else | |
434 | /* The only option left is an integral type. */ | |
435 | decimal_from_integral (arg2, dec, dec_len); | |
436 | ||
437 | return value_from_decfloat (type, dec); | |
438 | } | |
c906108c SS |
439 | else if ((code1 == TYPE_CODE_INT || code1 == TYPE_CODE_ENUM |
440 | || code1 == TYPE_CODE_RANGE) | |
0d5de010 DJ |
441 | && (scalar || code2 == TYPE_CODE_PTR |
442 | || code2 == TYPE_CODE_MEMBERPTR)) | |
c906108c SS |
443 | { |
444 | LONGEST longest; | |
c5aa993b | 445 | |
2bf1f4a1 | 446 | /* When we cast pointers to integers, we mustn't use |
76e71323 | 447 | gdbarch_pointer_to_address to find the address the pointer |
2bf1f4a1 JB |
448 | represents, as value_as_long would. GDB should evaluate |
449 | expressions just as the compiler would --- and the compiler | |
450 | sees a cast as a simple reinterpretation of the pointer's | |
451 | bits. */ | |
452 | if (code2 == TYPE_CODE_PTR) | |
0fd88904 | 453 | longest = extract_unsigned_integer (value_contents (arg2), |
2bf1f4a1 JB |
454 | TYPE_LENGTH (type2)); |
455 | else | |
456 | longest = value_as_long (arg2); | |
802db21b | 457 | return value_from_longest (type, convert_to_boolean ? |
716c501e | 458 | (LONGEST) (longest ? 1 : 0) : longest); |
c906108c | 459 | } |
ac3eeb49 MS |
460 | else if (code1 == TYPE_CODE_PTR && (code2 == TYPE_CODE_INT |
461 | || code2 == TYPE_CODE_ENUM | |
462 | || code2 == TYPE_CODE_RANGE)) | |
634acd5f | 463 | { |
4603e466 DT |
464 | /* TYPE_LENGTH (type) is the length of a pointer, but we really |
465 | want the length of an address! -- we are really dealing with | |
466 | addresses (i.e., gdb representations) not pointers (i.e., | |
467 | target representations) here. | |
468 | ||
469 | This allows things like "print *(int *)0x01000234" to work | |
470 | without printing a misleading message -- which would | |
471 | otherwise occur when dealing with a target having two byte | |
472 | pointers and four byte addresses. */ | |
473 | ||
17a912b6 | 474 | int addr_bit = gdbarch_addr_bit (current_gdbarch); |
4603e466 | 475 | |
634acd5f | 476 | LONGEST longest = value_as_long (arg2); |
4603e466 | 477 | if (addr_bit < sizeof (LONGEST) * HOST_CHAR_BIT) |
634acd5f | 478 | { |
4603e466 DT |
479 | if (longest >= ((LONGEST) 1 << addr_bit) |
480 | || longest <= -((LONGEST) 1 << addr_bit)) | |
8a3fe4f8 | 481 | warning (_("value truncated")); |
634acd5f AC |
482 | } |
483 | return value_from_longest (type, longest); | |
484 | } | |
0d5de010 DJ |
485 | else if (code1 == TYPE_CODE_METHODPTR && code2 == TYPE_CODE_INT |
486 | && value_as_long (arg2) == 0) | |
487 | { | |
488 | struct value *result = allocate_value (type); | |
ad4820ab | 489 | cplus_make_method_ptr (type, value_contents_writeable (result), 0, 0); |
0d5de010 DJ |
490 | return result; |
491 | } | |
492 | else if (code1 == TYPE_CODE_MEMBERPTR && code2 == TYPE_CODE_INT | |
493 | && value_as_long (arg2) == 0) | |
494 | { | |
495 | /* The Itanium C++ ABI represents NULL pointers to members as | |
496 | minus one, instead of biasing the normal case. */ | |
497 | return value_from_longest (type, -1); | |
498 | } | |
c906108c SS |
499 | else if (TYPE_LENGTH (type) == TYPE_LENGTH (type2)) |
500 | { | |
501 | if (code1 == TYPE_CODE_PTR && code2 == TYPE_CODE_PTR) | |
fb933624 DJ |
502 | return value_cast_pointers (type, arg2); |
503 | ||
0d5de010 | 504 | arg2 = value_copy (arg2); |
04624583 | 505 | deprecated_set_value_type (arg2, type); |
2b127877 | 506 | arg2 = value_change_enclosing_type (arg2, type); |
b44d461b | 507 | set_value_pointed_to_offset (arg2, 0); /* pai: chk_val */ |
c906108c SS |
508 | return arg2; |
509 | } | |
c906108c | 510 | else if (VALUE_LVAL (arg2) == lval_memory) |
42ae5230 | 511 | return value_at_lazy (type, value_address (arg2)); |
c906108c SS |
512 | else if (code1 == TYPE_CODE_VOID) |
513 | { | |
514 | return value_zero (builtin_type_void, not_lval); | |
515 | } | |
516 | else | |
517 | { | |
8a3fe4f8 | 518 | error (_("Invalid cast.")); |
c906108c SS |
519 | return 0; |
520 | } | |
521 | } | |
522 | ||
523 | /* Create a value of type TYPE that is zero, and return it. */ | |
524 | ||
f23631e4 | 525 | struct value * |
fba45db2 | 526 | value_zero (struct type *type, enum lval_type lv) |
c906108c | 527 | { |
f23631e4 | 528 | struct value *val = allocate_value (type); |
c906108c SS |
529 | VALUE_LVAL (val) = lv; |
530 | ||
531 | return val; | |
532 | } | |
533 | ||
301f0ecf DE |
534 | /* Create a value of numeric type TYPE that is one, and return it. */ |
535 | ||
536 | struct value * | |
537 | value_one (struct type *type, enum lval_type lv) | |
538 | { | |
539 | struct type *type1 = check_typedef (type); | |
4e608b4f | 540 | struct value *val; |
301f0ecf DE |
541 | |
542 | if (TYPE_CODE (type1) == TYPE_CODE_DECFLOAT) | |
543 | { | |
301f0ecf | 544 | gdb_byte v[16]; |
4e608b4f | 545 | decimal_from_string (v, TYPE_LENGTH (type), "1"); |
301f0ecf DE |
546 | val = value_from_decfloat (type, v); |
547 | } | |
548 | else if (TYPE_CODE (type1) == TYPE_CODE_FLT) | |
549 | { | |
550 | val = value_from_double (type, (DOUBLEST) 1); | |
551 | } | |
552 | else if (is_integral_type (type1)) | |
553 | { | |
554 | val = value_from_longest (type, (LONGEST) 1); | |
555 | } | |
556 | else | |
557 | { | |
558 | error (_("Not a numeric type.")); | |
559 | } | |
560 | ||
561 | VALUE_LVAL (val) = lv; | |
562 | return val; | |
563 | } | |
564 | ||
070ad9f0 | 565 | /* Return a value with type TYPE located at ADDR. |
c906108c SS |
566 | |
567 | Call value_at only if the data needs to be fetched immediately; | |
568 | if we can be 'lazy' and defer the fetch, perhaps indefinately, call | |
569 | value_at_lazy instead. value_at_lazy simply records the address of | |
070ad9f0 | 570 | the data and sets the lazy-evaluation-required flag. The lazy flag |
0fd88904 | 571 | is tested in the value_contents macro, which is used if and when |
070ad9f0 | 572 | the contents are actually required. |
c906108c SS |
573 | |
574 | Note: value_at does *NOT* handle embedded offsets; perform such | |
ac3eeb49 | 575 | adjustments before or after calling it. */ |
c906108c | 576 | |
f23631e4 | 577 | struct value * |
00a4c844 | 578 | value_at (struct type *type, CORE_ADDR addr) |
c906108c | 579 | { |
f23631e4 | 580 | struct value *val; |
c906108c SS |
581 | |
582 | if (TYPE_CODE (check_typedef (type)) == TYPE_CODE_VOID) | |
8a3fe4f8 | 583 | error (_("Attempt to dereference a generic pointer.")); |
c906108c SS |
584 | |
585 | val = allocate_value (type); | |
586 | ||
990a07ab | 587 | read_memory (addr, value_contents_all_raw (val), TYPE_LENGTH (type)); |
c906108c SS |
588 | |
589 | VALUE_LVAL (val) = lval_memory; | |
42ae5230 | 590 | set_value_address (val, addr); |
c906108c SS |
591 | |
592 | return val; | |
593 | } | |
594 | ||
595 | /* Return a lazy value with type TYPE located at ADDR (cf. value_at). */ | |
596 | ||
f23631e4 | 597 | struct value * |
00a4c844 | 598 | value_at_lazy (struct type *type, CORE_ADDR addr) |
c906108c | 599 | { |
f23631e4 | 600 | struct value *val; |
c906108c SS |
601 | |
602 | if (TYPE_CODE (check_typedef (type)) == TYPE_CODE_VOID) | |
8a3fe4f8 | 603 | error (_("Attempt to dereference a generic pointer.")); |
c906108c | 604 | |
3e3d7139 | 605 | val = allocate_value_lazy (type); |
c906108c SS |
606 | |
607 | VALUE_LVAL (val) = lval_memory; | |
42ae5230 | 608 | set_value_address (val, addr); |
c906108c SS |
609 | |
610 | return val; | |
611 | } | |
612 | ||
0fd88904 | 613 | /* Called only from the value_contents and value_contents_all() |
46615f07 | 614 | macros, if the current data for a variable needs to be loaded into |
0fd88904 | 615 | value_contents(VAL). Fetches the data from the user's process, and |
46615f07 AC |
616 | clears the lazy flag to indicate that the data in the buffer is |
617 | valid. | |
c906108c | 618 | |
ac3eeb49 MS |
619 | If the value is zero-length, we avoid calling read_memory, which |
620 | would abort. We mark the value as fetched anyway -- all 0 bytes of | |
621 | it. | |
c906108c | 622 | |
ac3eeb49 MS |
623 | This function returns a value because it is used in the |
624 | value_contents macro as part of an expression, where a void would | |
625 | not work. The value is ignored. */ | |
c906108c SS |
626 | |
627 | int | |
f23631e4 | 628 | value_fetch_lazy (struct value *val) |
c906108c | 629 | { |
3e3d7139 JG |
630 | gdb_assert (value_lazy (val)); |
631 | allocate_value_contents (val); | |
9214ee5f DJ |
632 | if (VALUE_LVAL (val) == lval_memory) |
633 | { | |
42ae5230 | 634 | CORE_ADDR addr = value_address (val); |
694182d2 | 635 | int length = TYPE_LENGTH (check_typedef (value_enclosing_type (val))); |
9214ee5f | 636 | |
9214ee5f DJ |
637 | if (length) |
638 | read_memory (addr, value_contents_all_raw (val), length); | |
639 | } | |
640 | else if (VALUE_LVAL (val) == lval_register) | |
641 | { | |
669fac23 DJ |
642 | struct frame_info *frame; |
643 | int regnum; | |
9214ee5f | 644 | struct type *type = check_typedef (value_type (val)); |
669fac23 | 645 | struct value *new_val = val, *mark = value_mark (); |
c906108c | 646 | |
669fac23 DJ |
647 | /* Offsets are not supported here; lazy register values must |
648 | refer to the entire register. */ | |
649 | gdb_assert (value_offset (val) == 0); | |
9214ee5f | 650 | |
669fac23 DJ |
651 | while (VALUE_LVAL (new_val) == lval_register && value_lazy (new_val)) |
652 | { | |
653 | frame = frame_find_by_id (VALUE_FRAME_ID (new_val)); | |
654 | regnum = VALUE_REGNUM (new_val); | |
655 | ||
656 | gdb_assert (frame != NULL); | |
9214ee5f | 657 | |
669fac23 DJ |
658 | /* Convertible register routines are used for multi-register |
659 | values and for interpretation in different types | |
660 | (e.g. float or int from a double register). Lazy | |
661 | register values should have the register's natural type, | |
662 | so they do not apply. */ | |
663 | gdb_assert (!gdbarch_convert_register_p (get_frame_arch (frame), | |
664 | regnum, type)); | |
665 | ||
666 | new_val = get_frame_register_value (frame, regnum); | |
667 | } | |
668 | ||
669 | /* If it's still lazy (for instance, a saved register on the | |
670 | stack), fetch it. */ | |
671 | if (value_lazy (new_val)) | |
672 | value_fetch_lazy (new_val); | |
673 | ||
674 | /* If the register was not saved, mark it unavailable. */ | |
675 | if (value_optimized_out (new_val)) | |
9214ee5f | 676 | set_value_optimized_out (val, 1); |
669fac23 DJ |
677 | else |
678 | memcpy (value_contents_raw (val), value_contents (new_val), | |
679 | TYPE_LENGTH (type)); | |
680 | ||
681 | if (frame_debug) | |
682 | { | |
029a67e4 | 683 | struct gdbarch *gdbarch; |
669fac23 DJ |
684 | frame = frame_find_by_id (VALUE_FRAME_ID (val)); |
685 | regnum = VALUE_REGNUM (val); | |
029a67e4 | 686 | gdbarch = get_frame_arch (frame); |
669fac23 DJ |
687 | |
688 | fprintf_unfiltered (gdb_stdlog, "\ | |
689 | { value_fetch_lazy (frame=%d,regnum=%d(%s),...) ", | |
690 | frame_relative_level (frame), regnum, | |
029a67e4 | 691 | user_reg_map_regnum_to_name (gdbarch, regnum)); |
669fac23 DJ |
692 | |
693 | fprintf_unfiltered (gdb_stdlog, "->"); | |
694 | if (value_optimized_out (new_val)) | |
695 | fprintf_unfiltered (gdb_stdlog, " optimized out"); | |
696 | else | |
697 | { | |
698 | int i; | |
699 | const gdb_byte *buf = value_contents (new_val); | |
700 | ||
701 | if (VALUE_LVAL (new_val) == lval_register) | |
702 | fprintf_unfiltered (gdb_stdlog, " register=%d", | |
703 | VALUE_REGNUM (new_val)); | |
704 | else if (VALUE_LVAL (new_val) == lval_memory) | |
705 | fprintf_unfiltered (gdb_stdlog, " address=0x%s", | |
42ae5230 | 706 | paddr_nz (value_address (new_val))); |
669fac23 DJ |
707 | else |
708 | fprintf_unfiltered (gdb_stdlog, " computed"); | |
709 | ||
710 | fprintf_unfiltered (gdb_stdlog, " bytes="); | |
711 | fprintf_unfiltered (gdb_stdlog, "["); | |
029a67e4 | 712 | for (i = 0; i < register_size (gdbarch, regnum); i++) |
669fac23 DJ |
713 | fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]); |
714 | fprintf_unfiltered (gdb_stdlog, "]"); | |
715 | } | |
716 | ||
717 | fprintf_unfiltered (gdb_stdlog, " }\n"); | |
718 | } | |
719 | ||
720 | /* Dispose of the intermediate values. This prevents | |
721 | watchpoints from trying to watch the saved frame pointer. */ | |
722 | value_free_to_mark (mark); | |
9214ee5f | 723 | } |
5f5233d4 PA |
724 | else if (VALUE_LVAL (val) == lval_computed) |
725 | value_computed_funcs (val)->read (val); | |
9214ee5f DJ |
726 | else |
727 | internal_error (__FILE__, __LINE__, "Unexpected lazy value type."); | |
802db21b | 728 | |
dfa52d88 | 729 | set_value_lazy (val, 0); |
c906108c SS |
730 | return 0; |
731 | } | |
732 | ||
733 | ||
734 | /* Store the contents of FROMVAL into the location of TOVAL. | |
735 | Return a new value with the location of TOVAL and contents of FROMVAL. */ | |
736 | ||
f23631e4 AC |
737 | struct value * |
738 | value_assign (struct value *toval, struct value *fromval) | |
c906108c | 739 | { |
52f0bd74 | 740 | struct type *type; |
f23631e4 | 741 | struct value *val; |
cb741690 | 742 | struct frame_id old_frame; |
c906108c | 743 | |
88e3b34b | 744 | if (!deprecated_value_modifiable (toval)) |
8a3fe4f8 | 745 | error (_("Left operand of assignment is not a modifiable lvalue.")); |
c906108c | 746 | |
994b9211 | 747 | toval = coerce_ref (toval); |
c906108c | 748 | |
df407dfe | 749 | type = value_type (toval); |
c906108c | 750 | if (VALUE_LVAL (toval) != lval_internalvar) |
63092375 DJ |
751 | { |
752 | toval = value_coerce_to_target (toval); | |
753 | fromval = value_cast (type, fromval); | |
754 | } | |
c906108c | 755 | else |
63092375 DJ |
756 | { |
757 | /* Coerce arrays and functions to pointers, except for arrays | |
758 | which only live in GDB's storage. */ | |
759 | if (!value_must_coerce_to_target (fromval)) | |
760 | fromval = coerce_array (fromval); | |
761 | } | |
762 | ||
c906108c SS |
763 | CHECK_TYPEDEF (type); |
764 | ||
ac3eeb49 MS |
765 | /* Since modifying a register can trash the frame chain, and |
766 | modifying memory can trash the frame cache, we save the old frame | |
767 | and then restore the new frame afterwards. */ | |
206415a3 | 768 | old_frame = get_frame_id (deprecated_safe_get_selected_frame ()); |
cb741690 | 769 | |
c906108c SS |
770 | switch (VALUE_LVAL (toval)) |
771 | { | |
772 | case lval_internalvar: | |
773 | set_internalvar (VALUE_INTERNALVAR (toval), fromval); | |
4fa62494 | 774 | val = value_copy (fromval); |
ac3eeb49 MS |
775 | val = value_change_enclosing_type (val, |
776 | value_enclosing_type (fromval)); | |
13c3b5f5 | 777 | set_value_embedded_offset (val, value_embedded_offset (fromval)); |
ac3eeb49 MS |
778 | set_value_pointed_to_offset (val, |
779 | value_pointed_to_offset (fromval)); | |
c906108c SS |
780 | return val; |
781 | ||
782 | case lval_internalvar_component: | |
783 | set_internalvar_component (VALUE_INTERNALVAR (toval), | |
df407dfe AC |
784 | value_offset (toval), |
785 | value_bitpos (toval), | |
786 | value_bitsize (toval), | |
c906108c SS |
787 | fromval); |
788 | break; | |
789 | ||
790 | case lval_memory: | |
791 | { | |
fc1a4b47 | 792 | const gdb_byte *dest_buffer; |
c5aa993b JM |
793 | CORE_ADDR changed_addr; |
794 | int changed_len; | |
10c42a71 | 795 | gdb_byte buffer[sizeof (LONGEST)]; |
c906108c | 796 | |
df407dfe | 797 | if (value_bitsize (toval)) |
c5aa993b | 798 | { |
ac3eeb49 MS |
799 | /* We assume that the argument to read_memory is in units |
800 | of host chars. FIXME: Is that correct? */ | |
df407dfe AC |
801 | changed_len = (value_bitpos (toval) |
802 | + value_bitsize (toval) | |
c5aa993b JM |
803 | + HOST_CHAR_BIT - 1) |
804 | / HOST_CHAR_BIT; | |
c906108c SS |
805 | |
806 | if (changed_len > (int) sizeof (LONGEST)) | |
8a3fe4f8 | 807 | error (_("Can't handle bitfields which don't fit in a %d bit word."), |
baa6f10b | 808 | (int) sizeof (LONGEST) * HOST_CHAR_BIT); |
c906108c | 809 | |
42ae5230 | 810 | read_memory (value_address (toval), buffer, changed_len); |
c906108c | 811 | modify_field (buffer, value_as_long (fromval), |
df407dfe | 812 | value_bitpos (toval), value_bitsize (toval)); |
42ae5230 | 813 | changed_addr = value_address (toval); |
c906108c SS |
814 | dest_buffer = buffer; |
815 | } | |
c906108c SS |
816 | else |
817 | { | |
42ae5230 | 818 | changed_addr = value_address (toval); |
c906108c | 819 | changed_len = TYPE_LENGTH (type); |
0fd88904 | 820 | dest_buffer = value_contents (fromval); |
c906108c SS |
821 | } |
822 | ||
823 | write_memory (changed_addr, dest_buffer, changed_len); | |
9a4105ab AC |
824 | if (deprecated_memory_changed_hook) |
825 | deprecated_memory_changed_hook (changed_addr, changed_len); | |
c906108c SS |
826 | } |
827 | break; | |
828 | ||
492254e9 | 829 | case lval_register: |
c906108c | 830 | { |
c906108c | 831 | struct frame_info *frame; |
d80b854b | 832 | struct gdbarch *gdbarch; |
ff2e87ac | 833 | int value_reg; |
c906108c SS |
834 | |
835 | /* Figure out which frame this is in currently. */ | |
0c16dd26 AC |
836 | frame = frame_find_by_id (VALUE_FRAME_ID (toval)); |
837 | value_reg = VALUE_REGNUM (toval); | |
c906108c SS |
838 | |
839 | if (!frame) | |
8a3fe4f8 | 840 | error (_("Value being assigned to is no longer active.")); |
d80b854b UW |
841 | |
842 | gdbarch = get_frame_arch (frame); | |
843 | if (gdbarch_convert_register_p (gdbarch, VALUE_REGNUM (toval), type)) | |
492254e9 | 844 | { |
ff2e87ac | 845 | /* If TOVAL is a special machine register requiring |
ac3eeb49 MS |
846 | conversion of program values to a special raw |
847 | format. */ | |
d80b854b | 848 | gdbarch_value_to_register (gdbarch, frame, |
ac3eeb49 MS |
849 | VALUE_REGNUM (toval), type, |
850 | value_contents (fromval)); | |
492254e9 | 851 | } |
c906108c | 852 | else |
492254e9 | 853 | { |
df407dfe | 854 | if (value_bitsize (toval)) |
00fa51f6 UW |
855 | { |
856 | int changed_len; | |
857 | gdb_byte buffer[sizeof (LONGEST)]; | |
858 | ||
859 | changed_len = (value_bitpos (toval) | |
860 | + value_bitsize (toval) | |
861 | + HOST_CHAR_BIT - 1) | |
862 | / HOST_CHAR_BIT; | |
863 | ||
864 | if (changed_len > (int) sizeof (LONGEST)) | |
865 | error (_("Can't handle bitfields which don't fit in a %d bit word."), | |
866 | (int) sizeof (LONGEST) * HOST_CHAR_BIT); | |
867 | ||
868 | get_frame_register_bytes (frame, value_reg, | |
869 | value_offset (toval), | |
870 | changed_len, buffer); | |
871 | ||
872 | modify_field (buffer, value_as_long (fromval), | |
ac3eeb49 MS |
873 | value_bitpos (toval), |
874 | value_bitsize (toval)); | |
00fa51f6 UW |
875 | |
876 | put_frame_register_bytes (frame, value_reg, | |
877 | value_offset (toval), | |
878 | changed_len, buffer); | |
879 | } | |
c906108c | 880 | else |
00fa51f6 UW |
881 | { |
882 | put_frame_register_bytes (frame, value_reg, | |
883 | value_offset (toval), | |
884 | TYPE_LENGTH (type), | |
885 | value_contents (fromval)); | |
886 | } | |
ff2e87ac | 887 | } |
00fa51f6 | 888 | |
9a4105ab AC |
889 | if (deprecated_register_changed_hook) |
890 | deprecated_register_changed_hook (-1); | |
f4c5303c | 891 | observer_notify_target_changed (¤t_target); |
ff2e87ac | 892 | break; |
c906108c | 893 | } |
5f5233d4 PA |
894 | |
895 | case lval_computed: | |
896 | { | |
897 | struct lval_funcs *funcs = value_computed_funcs (toval); | |
898 | ||
899 | funcs->write (toval, fromval); | |
900 | } | |
901 | break; | |
902 | ||
c906108c | 903 | default: |
8a3fe4f8 | 904 | error (_("Left operand of assignment is not an lvalue.")); |
c906108c SS |
905 | } |
906 | ||
cb741690 DJ |
907 | /* Assigning to the stack pointer, frame pointer, and other |
908 | (architecture and calling convention specific) registers may | |
909 | cause the frame cache to be out of date. Assigning to memory | |
910 | also can. We just do this on all assignments to registers or | |
911 | memory, for simplicity's sake; I doubt the slowdown matters. */ | |
912 | switch (VALUE_LVAL (toval)) | |
913 | { | |
914 | case lval_memory: | |
915 | case lval_register: | |
cb741690 DJ |
916 | |
917 | reinit_frame_cache (); | |
918 | ||
ac3eeb49 MS |
919 | /* Having destroyed the frame cache, restore the selected |
920 | frame. */ | |
cb741690 DJ |
921 | |
922 | /* FIXME: cagney/2002-11-02: There has to be a better way of | |
923 | doing this. Instead of constantly saving/restoring the | |
924 | frame. Why not create a get_selected_frame() function that, | |
925 | having saved the selected frame's ID can automatically | |
926 | re-find the previously selected frame automatically. */ | |
927 | ||
928 | { | |
929 | struct frame_info *fi = frame_find_by_id (old_frame); | |
930 | if (fi != NULL) | |
931 | select_frame (fi); | |
932 | } | |
933 | ||
934 | break; | |
935 | default: | |
936 | break; | |
937 | } | |
938 | ||
ac3eeb49 MS |
939 | /* If the field does not entirely fill a LONGEST, then zero the sign |
940 | bits. If the field is signed, and is negative, then sign | |
941 | extend. */ | |
df407dfe AC |
942 | if ((value_bitsize (toval) > 0) |
943 | && (value_bitsize (toval) < 8 * (int) sizeof (LONGEST))) | |
c906108c SS |
944 | { |
945 | LONGEST fieldval = value_as_long (fromval); | |
df407dfe | 946 | LONGEST valmask = (((ULONGEST) 1) << value_bitsize (toval)) - 1; |
c906108c SS |
947 | |
948 | fieldval &= valmask; | |
ac3eeb49 MS |
949 | if (!TYPE_UNSIGNED (type) |
950 | && (fieldval & (valmask ^ (valmask >> 1)))) | |
c906108c SS |
951 | fieldval |= ~valmask; |
952 | ||
953 | fromval = value_from_longest (type, fieldval); | |
954 | } | |
955 | ||
956 | val = value_copy (toval); | |
0fd88904 | 957 | memcpy (value_contents_raw (val), value_contents (fromval), |
c906108c | 958 | TYPE_LENGTH (type)); |
04624583 | 959 | deprecated_set_value_type (val, type); |
ac3eeb49 MS |
960 | val = value_change_enclosing_type (val, |
961 | value_enclosing_type (fromval)); | |
13c3b5f5 | 962 | set_value_embedded_offset (val, value_embedded_offset (fromval)); |
b44d461b | 963 | set_value_pointed_to_offset (val, value_pointed_to_offset (fromval)); |
c5aa993b | 964 | |
c906108c SS |
965 | return val; |
966 | } | |
967 | ||
968 | /* Extend a value VAL to COUNT repetitions of its type. */ | |
969 | ||
f23631e4 AC |
970 | struct value * |
971 | value_repeat (struct value *arg1, int count) | |
c906108c | 972 | { |
f23631e4 | 973 | struct value *val; |
c906108c SS |
974 | |
975 | if (VALUE_LVAL (arg1) != lval_memory) | |
8a3fe4f8 | 976 | error (_("Only values in memory can be extended with '@'.")); |
c906108c | 977 | if (count < 1) |
8a3fe4f8 | 978 | error (_("Invalid number %d of repetitions."), count); |
c906108c | 979 | |
4754a64e | 980 | val = allocate_repeat_value (value_enclosing_type (arg1), count); |
c906108c | 981 | |
42ae5230 | 982 | read_memory (value_address (arg1), |
990a07ab | 983 | value_contents_all_raw (val), |
4754a64e | 984 | TYPE_LENGTH (value_enclosing_type (val))); |
c906108c | 985 | VALUE_LVAL (val) = lval_memory; |
42ae5230 | 986 | set_value_address (val, value_address (arg1)); |
c906108c SS |
987 | |
988 | return val; | |
989 | } | |
990 | ||
f23631e4 | 991 | struct value * |
fba45db2 | 992 | value_of_variable (struct symbol *var, struct block *b) |
c906108c | 993 | { |
f23631e4 | 994 | struct value *val; |
61212c0f | 995 | struct frame_info *frame; |
c906108c | 996 | |
61212c0f UW |
997 | if (!symbol_read_needs_frame (var)) |
998 | frame = NULL; | |
999 | else if (!b) | |
1000 | frame = get_selected_frame (_("No frame selected.")); | |
1001 | else | |
c906108c SS |
1002 | { |
1003 | frame = block_innermost_frame (b); | |
1004 | if (!frame) | |
c5aa993b | 1005 | { |
edb3359d | 1006 | if (BLOCK_FUNCTION (b) && !block_inlined_p (b) |
de5ad195 | 1007 | && SYMBOL_PRINT_NAME (BLOCK_FUNCTION (b))) |
8a3fe4f8 | 1008 | error (_("No frame is currently executing in block %s."), |
de5ad195 | 1009 | SYMBOL_PRINT_NAME (BLOCK_FUNCTION (b))); |
c906108c | 1010 | else |
8a3fe4f8 | 1011 | error (_("No frame is currently executing in specified block")); |
c5aa993b | 1012 | } |
c906108c SS |
1013 | } |
1014 | ||
1015 | val = read_var_value (var, frame); | |
1016 | if (!val) | |
8a3fe4f8 | 1017 | error (_("Address of symbol \"%s\" is unknown."), SYMBOL_PRINT_NAME (var)); |
c906108c SS |
1018 | |
1019 | return val; | |
1020 | } | |
1021 | ||
61212c0f UW |
1022 | struct value * |
1023 | address_of_variable (struct symbol *var, struct block *b) | |
1024 | { | |
1025 | struct type *type = SYMBOL_TYPE (var); | |
1026 | struct value *val; | |
1027 | ||
1028 | /* Evaluate it first; if the result is a memory address, we're fine. | |
1029 | Lazy evaluation pays off here. */ | |
1030 | ||
1031 | val = value_of_variable (var, b); | |
1032 | ||
1033 | if ((VALUE_LVAL (val) == lval_memory && value_lazy (val)) | |
1034 | || TYPE_CODE (type) == TYPE_CODE_FUNC) | |
1035 | { | |
42ae5230 | 1036 | CORE_ADDR addr = value_address (val); |
61212c0f UW |
1037 | return value_from_pointer (lookup_pointer_type (type), addr); |
1038 | } | |
1039 | ||
1040 | /* Not a memory address; check what the problem was. */ | |
1041 | switch (VALUE_LVAL (val)) | |
1042 | { | |
1043 | case lval_register: | |
1044 | { | |
1045 | struct frame_info *frame; | |
1046 | const char *regname; | |
1047 | ||
1048 | frame = frame_find_by_id (VALUE_FRAME_ID (val)); | |
1049 | gdb_assert (frame); | |
1050 | ||
1051 | regname = gdbarch_register_name (get_frame_arch (frame), | |
1052 | VALUE_REGNUM (val)); | |
1053 | gdb_assert (regname && *regname); | |
1054 | ||
1055 | error (_("Address requested for identifier " | |
1056 | "\"%s\" which is in register $%s"), | |
1057 | SYMBOL_PRINT_NAME (var), regname); | |
1058 | break; | |
1059 | } | |
1060 | ||
1061 | default: | |
1062 | error (_("Can't take address of \"%s\" which isn't an lvalue."), | |
1063 | SYMBOL_PRINT_NAME (var)); | |
1064 | break; | |
1065 | } | |
1066 | ||
1067 | return val; | |
1068 | } | |
1069 | ||
63092375 DJ |
1070 | /* Return one if VAL does not live in target memory, but should in order |
1071 | to operate on it. Otherwise return zero. */ | |
1072 | ||
1073 | int | |
1074 | value_must_coerce_to_target (struct value *val) | |
1075 | { | |
1076 | struct type *valtype; | |
1077 | ||
1078 | /* The only lval kinds which do not live in target memory. */ | |
1079 | if (VALUE_LVAL (val) != not_lval | |
1080 | && VALUE_LVAL (val) != lval_internalvar) | |
1081 | return 0; | |
1082 | ||
1083 | valtype = check_typedef (value_type (val)); | |
1084 | ||
1085 | switch (TYPE_CODE (valtype)) | |
1086 | { | |
1087 | case TYPE_CODE_ARRAY: | |
1088 | case TYPE_CODE_STRING: | |
1089 | return 1; | |
1090 | default: | |
1091 | return 0; | |
1092 | } | |
1093 | } | |
1094 | ||
1095 | /* Make sure that VAL lives in target memory if it's supposed to. For instance, | |
1096 | strings are constructed as character arrays in GDB's storage, and this | |
1097 | function copies them to the target. */ | |
1098 | ||
1099 | struct value * | |
1100 | value_coerce_to_target (struct value *val) | |
1101 | { | |
1102 | LONGEST length; | |
1103 | CORE_ADDR addr; | |
1104 | ||
1105 | if (!value_must_coerce_to_target (val)) | |
1106 | return val; | |
1107 | ||
1108 | length = TYPE_LENGTH (check_typedef (value_type (val))); | |
1109 | addr = allocate_space_in_inferior (length); | |
1110 | write_memory (addr, value_contents (val), length); | |
1111 | return value_at_lazy (value_type (val), addr); | |
1112 | } | |
1113 | ||
ac3eeb49 MS |
1114 | /* Given a value which is an array, return a value which is a pointer |
1115 | to its first element, regardless of whether or not the array has a | |
1116 | nonzero lower bound. | |
c906108c | 1117 | |
ac3eeb49 MS |
1118 | FIXME: A previous comment here indicated that this routine should |
1119 | be substracting the array's lower bound. It's not clear to me that | |
1120 | this is correct. Given an array subscripting operation, it would | |
1121 | certainly work to do the adjustment here, essentially computing: | |
c906108c SS |
1122 | |
1123 | (&array[0] - (lowerbound * sizeof array[0])) + (index * sizeof array[0]) | |
1124 | ||
ac3eeb49 MS |
1125 | However I believe a more appropriate and logical place to account |
1126 | for the lower bound is to do so in value_subscript, essentially | |
1127 | computing: | |
c906108c SS |
1128 | |
1129 | (&array[0] + ((index - lowerbound) * sizeof array[0])) | |
1130 | ||
ac3eeb49 MS |
1131 | As further evidence consider what would happen with operations |
1132 | other than array subscripting, where the caller would get back a | |
1133 | value that had an address somewhere before the actual first element | |
1134 | of the array, and the information about the lower bound would be | |
1135 | lost because of the coercion to pointer type. | |
c5aa993b | 1136 | */ |
c906108c | 1137 | |
f23631e4 AC |
1138 | struct value * |
1139 | value_coerce_array (struct value *arg1) | |
c906108c | 1140 | { |
df407dfe | 1141 | struct type *type = check_typedef (value_type (arg1)); |
c906108c | 1142 | |
63092375 DJ |
1143 | /* If the user tries to do something requiring a pointer with an |
1144 | array that has not yet been pushed to the target, then this would | |
1145 | be a good time to do so. */ | |
1146 | arg1 = value_coerce_to_target (arg1); | |
1147 | ||
c906108c | 1148 | if (VALUE_LVAL (arg1) != lval_memory) |
8a3fe4f8 | 1149 | error (_("Attempt to take address of value not located in memory.")); |
c906108c | 1150 | |
4478b372 | 1151 | return value_from_pointer (lookup_pointer_type (TYPE_TARGET_TYPE (type)), |
42ae5230 | 1152 | value_address (arg1)); |
c906108c SS |
1153 | } |
1154 | ||
1155 | /* Given a value which is a function, return a value which is a pointer | |
1156 | to it. */ | |
1157 | ||
f23631e4 AC |
1158 | struct value * |
1159 | value_coerce_function (struct value *arg1) | |
c906108c | 1160 | { |
f23631e4 | 1161 | struct value *retval; |
c906108c SS |
1162 | |
1163 | if (VALUE_LVAL (arg1) != lval_memory) | |
8a3fe4f8 | 1164 | error (_("Attempt to take address of value not located in memory.")); |
c906108c | 1165 | |
df407dfe | 1166 | retval = value_from_pointer (lookup_pointer_type (value_type (arg1)), |
42ae5230 | 1167 | value_address (arg1)); |
c906108c | 1168 | return retval; |
c5aa993b | 1169 | } |
c906108c | 1170 | |
ac3eeb49 MS |
1171 | /* Return a pointer value for the object for which ARG1 is the |
1172 | contents. */ | |
c906108c | 1173 | |
f23631e4 AC |
1174 | struct value * |
1175 | value_addr (struct value *arg1) | |
c906108c | 1176 | { |
f23631e4 | 1177 | struct value *arg2; |
c906108c | 1178 | |
df407dfe | 1179 | struct type *type = check_typedef (value_type (arg1)); |
c906108c SS |
1180 | if (TYPE_CODE (type) == TYPE_CODE_REF) |
1181 | { | |
ac3eeb49 MS |
1182 | /* Copy the value, but change the type from (T&) to (T*). We |
1183 | keep the same location information, which is efficient, and | |
1184 | allows &(&X) to get the location containing the reference. */ | |
c906108c | 1185 | arg2 = value_copy (arg1); |
ac3eeb49 MS |
1186 | deprecated_set_value_type (arg2, |
1187 | lookup_pointer_type (TYPE_TARGET_TYPE (type))); | |
c906108c SS |
1188 | return arg2; |
1189 | } | |
1190 | if (TYPE_CODE (type) == TYPE_CODE_FUNC) | |
1191 | return value_coerce_function (arg1); | |
1192 | ||
63092375 DJ |
1193 | /* If this is an array that has not yet been pushed to the target, |
1194 | then this would be a good time to force it to memory. */ | |
1195 | arg1 = value_coerce_to_target (arg1); | |
1196 | ||
c906108c | 1197 | if (VALUE_LVAL (arg1) != lval_memory) |
8a3fe4f8 | 1198 | error (_("Attempt to take address of value not located in memory.")); |
c906108c | 1199 | |
c5aa993b | 1200 | /* Get target memory address */ |
df407dfe | 1201 | arg2 = value_from_pointer (lookup_pointer_type (value_type (arg1)), |
42ae5230 | 1202 | (value_address (arg1) |
13c3b5f5 | 1203 | + value_embedded_offset (arg1))); |
c906108c SS |
1204 | |
1205 | /* This may be a pointer to a base subobject; so remember the | |
ac3eeb49 | 1206 | full derived object's type ... */ |
4754a64e | 1207 | arg2 = value_change_enclosing_type (arg2, lookup_pointer_type (value_enclosing_type (arg1))); |
ac3eeb49 MS |
1208 | /* ... and also the relative position of the subobject in the full |
1209 | object. */ | |
b44d461b | 1210 | set_value_pointed_to_offset (arg2, value_embedded_offset (arg1)); |
c906108c SS |
1211 | return arg2; |
1212 | } | |
1213 | ||
ac3eeb49 MS |
1214 | /* Return a reference value for the object for which ARG1 is the |
1215 | contents. */ | |
fb933624 DJ |
1216 | |
1217 | struct value * | |
1218 | value_ref (struct value *arg1) | |
1219 | { | |
1220 | struct value *arg2; | |
1221 | ||
1222 | struct type *type = check_typedef (value_type (arg1)); | |
1223 | if (TYPE_CODE (type) == TYPE_CODE_REF) | |
1224 | return arg1; | |
1225 | ||
1226 | arg2 = value_addr (arg1); | |
1227 | deprecated_set_value_type (arg2, lookup_reference_type (type)); | |
1228 | return arg2; | |
1229 | } | |
1230 | ||
ac3eeb49 MS |
1231 | /* Given a value of a pointer type, apply the C unary * operator to |
1232 | it. */ | |
c906108c | 1233 | |
f23631e4 AC |
1234 | struct value * |
1235 | value_ind (struct value *arg1) | |
c906108c SS |
1236 | { |
1237 | struct type *base_type; | |
f23631e4 | 1238 | struct value *arg2; |
c906108c | 1239 | |
994b9211 | 1240 | arg1 = coerce_array (arg1); |
c906108c | 1241 | |
df407dfe | 1242 | base_type = check_typedef (value_type (arg1)); |
c906108c | 1243 | |
22fe0fbb | 1244 | if (TYPE_CODE (base_type) == TYPE_CODE_PTR) |
c906108c SS |
1245 | { |
1246 | struct type *enc_type; | |
ac3eeb49 MS |
1247 | /* We may be pointing to something embedded in a larger object. |
1248 | Get the real type of the enclosing object. */ | |
4754a64e | 1249 | enc_type = check_typedef (value_enclosing_type (arg1)); |
c906108c | 1250 | enc_type = TYPE_TARGET_TYPE (enc_type); |
0d5de010 DJ |
1251 | |
1252 | if (TYPE_CODE (check_typedef (enc_type)) == TYPE_CODE_FUNC | |
1253 | || TYPE_CODE (check_typedef (enc_type)) == TYPE_CODE_METHOD) | |
1254 | /* For functions, go through find_function_addr, which knows | |
1255 | how to handle function descriptors. */ | |
ac3eeb49 MS |
1256 | arg2 = value_at_lazy (enc_type, |
1257 | find_function_addr (arg1, NULL)); | |
0d5de010 DJ |
1258 | else |
1259 | /* Retrieve the enclosing object pointed to */ | |
ac3eeb49 MS |
1260 | arg2 = value_at_lazy (enc_type, |
1261 | (value_as_address (arg1) | |
1262 | - value_pointed_to_offset (arg1))); | |
0d5de010 | 1263 | |
ac3eeb49 | 1264 | /* Re-adjust type. */ |
04624583 | 1265 | deprecated_set_value_type (arg2, TYPE_TARGET_TYPE (base_type)); |
ac3eeb49 | 1266 | /* Add embedding info. */ |
2b127877 | 1267 | arg2 = value_change_enclosing_type (arg2, enc_type); |
b44d461b | 1268 | set_value_embedded_offset (arg2, value_pointed_to_offset (arg1)); |
c906108c | 1269 | |
ac3eeb49 | 1270 | /* We may be pointing to an object of some derived type. */ |
c906108c SS |
1271 | arg2 = value_full_object (arg2, NULL, 0, 0, 0); |
1272 | return arg2; | |
1273 | } | |
1274 | ||
8a3fe4f8 | 1275 | error (_("Attempt to take contents of a non-pointer value.")); |
ac3eeb49 | 1276 | return 0; /* For lint -- never reached. */ |
c906108c SS |
1277 | } |
1278 | \f | |
63092375 | 1279 | /* Create a value for an array by allocating space in GDB, copying |
ac3eeb49 MS |
1280 | copying the data into that space, and then setting up an array |
1281 | value. | |
c906108c | 1282 | |
ac3eeb49 MS |
1283 | The array bounds are set from LOWBOUND and HIGHBOUND, and the array |
1284 | is populated from the values passed in ELEMVEC. | |
c906108c SS |
1285 | |
1286 | The element type of the array is inherited from the type of the | |
1287 | first element, and all elements must have the same size (though we | |
ac3eeb49 | 1288 | don't currently enforce any restriction on their types). */ |
c906108c | 1289 | |
f23631e4 AC |
1290 | struct value * |
1291 | value_array (int lowbound, int highbound, struct value **elemvec) | |
c906108c SS |
1292 | { |
1293 | int nelem; | |
1294 | int idx; | |
1295 | unsigned int typelength; | |
f23631e4 | 1296 | struct value *val; |
c906108c SS |
1297 | struct type *rangetype; |
1298 | struct type *arraytype; | |
1299 | CORE_ADDR addr; | |
1300 | ||
ac3eeb49 MS |
1301 | /* Validate that the bounds are reasonable and that each of the |
1302 | elements have the same size. */ | |
c906108c SS |
1303 | |
1304 | nelem = highbound - lowbound + 1; | |
1305 | if (nelem <= 0) | |
1306 | { | |
8a3fe4f8 | 1307 | error (_("bad array bounds (%d, %d)"), lowbound, highbound); |
c906108c | 1308 | } |
4754a64e | 1309 | typelength = TYPE_LENGTH (value_enclosing_type (elemvec[0])); |
c906108c SS |
1310 | for (idx = 1; idx < nelem; idx++) |
1311 | { | |
4754a64e | 1312 | if (TYPE_LENGTH (value_enclosing_type (elemvec[idx])) != typelength) |
c906108c | 1313 | { |
8a3fe4f8 | 1314 | error (_("array elements must all be the same size")); |
c906108c SS |
1315 | } |
1316 | } | |
1317 | ||
ac3eeb49 | 1318 | rangetype = create_range_type ((struct type *) NULL, |
6d84d3d8 | 1319 | builtin_type_int32, |
c906108c | 1320 | lowbound, highbound); |
c5aa993b | 1321 | arraytype = create_array_type ((struct type *) NULL, |
ac3eeb49 MS |
1322 | value_enclosing_type (elemvec[0]), |
1323 | rangetype); | |
c906108c SS |
1324 | |
1325 | if (!current_language->c_style_arrays) | |
1326 | { | |
1327 | val = allocate_value (arraytype); | |
1328 | for (idx = 0; idx < nelem; idx++) | |
1329 | { | |
990a07ab | 1330 | memcpy (value_contents_all_raw (val) + (idx * typelength), |
46615f07 | 1331 | value_contents_all (elemvec[idx]), |
c906108c SS |
1332 | typelength); |
1333 | } | |
c906108c SS |
1334 | return val; |
1335 | } | |
1336 | ||
63092375 DJ |
1337 | /* Allocate space to store the array, and then initialize it by |
1338 | copying in each element. */ | |
c906108c | 1339 | |
63092375 | 1340 | val = allocate_value (arraytype); |
c906108c | 1341 | for (idx = 0; idx < nelem; idx++) |
63092375 DJ |
1342 | memcpy (value_contents_writeable (val) + (idx * typelength), |
1343 | value_contents_all (elemvec[idx]), | |
1344 | typelength); | |
1345 | return val; | |
c906108c SS |
1346 | } |
1347 | ||
6c7a06a3 | 1348 | struct value * |
3b7538c0 | 1349 | value_cstring (char *ptr, int len, struct type *char_type) |
6c7a06a3 TT |
1350 | { |
1351 | struct value *val; | |
1352 | int lowbound = current_language->string_lower_bound; | |
1353 | int highbound = len / TYPE_LENGTH (char_type); | |
1354 | struct type *rangetype = create_range_type ((struct type *) NULL, | |
1355 | builtin_type_int32, | |
1356 | lowbound, | |
1357 | highbound + lowbound - 1); | |
1358 | struct type *stringtype | |
1359 | = create_array_type ((struct type *) NULL, char_type, rangetype); | |
1360 | ||
1361 | val = allocate_value (stringtype); | |
1362 | memcpy (value_contents_raw (val), ptr, len); | |
1363 | return val; | |
1364 | } | |
1365 | ||
ac3eeb49 MS |
1366 | /* Create a value for a string constant by allocating space in the |
1367 | inferior, copying the data into that space, and returning the | |
1368 | address with type TYPE_CODE_STRING. PTR points to the string | |
1369 | constant data; LEN is number of characters. | |
1370 | ||
1371 | Note that string types are like array of char types with a lower | |
1372 | bound of zero and an upper bound of LEN - 1. Also note that the | |
1373 | string may contain embedded null bytes. */ | |
c906108c | 1374 | |
f23631e4 | 1375 | struct value * |
3b7538c0 | 1376 | value_string (char *ptr, int len, struct type *char_type) |
c906108c | 1377 | { |
f23631e4 | 1378 | struct value *val; |
c906108c | 1379 | int lowbound = current_language->string_lower_bound; |
3b7538c0 | 1380 | int highbound = len / TYPE_LENGTH (char_type); |
c906108c | 1381 | struct type *rangetype = create_range_type ((struct type *) NULL, |
6d84d3d8 | 1382 | builtin_type_int32, |
ac3eeb49 | 1383 | lowbound, |
3b7538c0 | 1384 | highbound + lowbound - 1); |
c906108c | 1385 | struct type *stringtype |
3b7538c0 | 1386 | = create_string_type ((struct type *) NULL, char_type, rangetype); |
c906108c | 1387 | |
3b7538c0 UW |
1388 | val = allocate_value (stringtype); |
1389 | memcpy (value_contents_raw (val), ptr, len); | |
1390 | return val; | |
c906108c SS |
1391 | } |
1392 | ||
f23631e4 | 1393 | struct value * |
fba45db2 | 1394 | value_bitstring (char *ptr, int len) |
c906108c | 1395 | { |
f23631e4 | 1396 | struct value *val; |
ac3eeb49 | 1397 | struct type *domain_type = create_range_type (NULL, |
6d84d3d8 | 1398 | builtin_type_int32, |
c906108c | 1399 | 0, len - 1); |
ac3eeb49 MS |
1400 | struct type *type = create_set_type ((struct type *) NULL, |
1401 | domain_type); | |
c906108c SS |
1402 | TYPE_CODE (type) = TYPE_CODE_BITSTRING; |
1403 | val = allocate_value (type); | |
990a07ab | 1404 | memcpy (value_contents_raw (val), ptr, TYPE_LENGTH (type)); |
c906108c SS |
1405 | return val; |
1406 | } | |
1407 | \f | |
ac3eeb49 MS |
1408 | /* See if we can pass arguments in T2 to a function which takes |
1409 | arguments of types T1. T1 is a list of NARGS arguments, and T2 is | |
1410 | a NULL-terminated vector. If some arguments need coercion of some | |
1411 | sort, then the coerced values are written into T2. Return value is | |
1412 | 0 if the arguments could be matched, or the position at which they | |
1413 | differ if not. | |
c906108c | 1414 | |
ac3eeb49 MS |
1415 | STATICP is nonzero if the T1 argument list came from a static |
1416 | member function. T2 will still include the ``this'' pointer, but | |
1417 | it will be skipped. | |
c906108c SS |
1418 | |
1419 | For non-static member functions, we ignore the first argument, | |
ac3eeb49 MS |
1420 | which is the type of the instance variable. This is because we |
1421 | want to handle calls with objects from derived classes. This is | |
1422 | not entirely correct: we should actually check to make sure that a | |
c906108c SS |
1423 | requested operation is type secure, shouldn't we? FIXME. */ |
1424 | ||
1425 | static int | |
ad2f7632 DJ |
1426 | typecmp (int staticp, int varargs, int nargs, |
1427 | struct field t1[], struct value *t2[]) | |
c906108c SS |
1428 | { |
1429 | int i; | |
1430 | ||
1431 | if (t2 == 0) | |
ac3eeb49 MS |
1432 | internal_error (__FILE__, __LINE__, |
1433 | _("typecmp: no argument list")); | |
ad2f7632 | 1434 | |
ac3eeb49 MS |
1435 | /* Skip ``this'' argument if applicable. T2 will always include |
1436 | THIS. */ | |
4a1970e4 | 1437 | if (staticp) |
ad2f7632 DJ |
1438 | t2 ++; |
1439 | ||
1440 | for (i = 0; | |
1441 | (i < nargs) && TYPE_CODE (t1[i].type) != TYPE_CODE_VOID; | |
1442 | i++) | |
c906108c | 1443 | { |
c5aa993b | 1444 | struct type *tt1, *tt2; |
ad2f7632 | 1445 | |
c5aa993b JM |
1446 | if (!t2[i]) |
1447 | return i + 1; | |
ad2f7632 DJ |
1448 | |
1449 | tt1 = check_typedef (t1[i].type); | |
df407dfe | 1450 | tt2 = check_typedef (value_type (t2[i])); |
ad2f7632 | 1451 | |
c906108c | 1452 | if (TYPE_CODE (tt1) == TYPE_CODE_REF |
c5aa993b | 1453 | /* We should be doing hairy argument matching, as below. */ |
c906108c SS |
1454 | && (TYPE_CODE (check_typedef (TYPE_TARGET_TYPE (tt1))) == TYPE_CODE (tt2))) |
1455 | { | |
1456 | if (TYPE_CODE (tt2) == TYPE_CODE_ARRAY) | |
1457 | t2[i] = value_coerce_array (t2[i]); | |
1458 | else | |
fb933624 | 1459 | t2[i] = value_ref (t2[i]); |
c906108c SS |
1460 | continue; |
1461 | } | |
1462 | ||
802db21b DB |
1463 | /* djb - 20000715 - Until the new type structure is in the |
1464 | place, and we can attempt things like implicit conversions, | |
1465 | we need to do this so you can take something like a map<const | |
1466 | char *>, and properly access map["hello"], because the | |
1467 | argument to [] will be a reference to a pointer to a char, | |
ac3eeb49 MS |
1468 | and the argument will be a pointer to a char. */ |
1469 | while (TYPE_CODE(tt1) == TYPE_CODE_REF | |
1470 | || TYPE_CODE (tt1) == TYPE_CODE_PTR) | |
802db21b DB |
1471 | { |
1472 | tt1 = check_typedef( TYPE_TARGET_TYPE(tt1) ); | |
1473 | } | |
ac3eeb49 MS |
1474 | while (TYPE_CODE(tt2) == TYPE_CODE_ARRAY |
1475 | || TYPE_CODE(tt2) == TYPE_CODE_PTR | |
1476 | || TYPE_CODE(tt2) == TYPE_CODE_REF) | |
c906108c | 1477 | { |
ac3eeb49 | 1478 | tt2 = check_typedef (TYPE_TARGET_TYPE(tt2)); |
c906108c | 1479 | } |
c5aa993b JM |
1480 | if (TYPE_CODE (tt1) == TYPE_CODE (tt2)) |
1481 | continue; | |
ac3eeb49 MS |
1482 | /* Array to pointer is a `trivial conversion' according to the |
1483 | ARM. */ | |
c906108c | 1484 | |
ac3eeb49 MS |
1485 | /* We should be doing much hairier argument matching (see |
1486 | section 13.2 of the ARM), but as a quick kludge, just check | |
1487 | for the same type code. */ | |
df407dfe | 1488 | if (TYPE_CODE (t1[i].type) != TYPE_CODE (value_type (t2[i]))) |
c5aa993b | 1489 | return i + 1; |
c906108c | 1490 | } |
ad2f7632 | 1491 | if (varargs || t2[i] == NULL) |
c5aa993b | 1492 | return 0; |
ad2f7632 | 1493 | return i + 1; |
c906108c SS |
1494 | } |
1495 | ||
ac3eeb49 MS |
1496 | /* Helper function used by value_struct_elt to recurse through |
1497 | baseclasses. Look for a field NAME in ARG1. Adjust the address of | |
1498 | ARG1 by OFFSET bytes, and search in it assuming it has (class) type | |
1499 | TYPE. If found, return value, else return NULL. | |
c906108c | 1500 | |
ac3eeb49 MS |
1501 | If LOOKING_FOR_BASECLASS, then instead of looking for struct |
1502 | fields, look for a baseclass named NAME. */ | |
c906108c | 1503 | |
f23631e4 AC |
1504 | static struct value * |
1505 | search_struct_field (char *name, struct value *arg1, int offset, | |
aa1ee363 | 1506 | struct type *type, int looking_for_baseclass) |
c906108c SS |
1507 | { |
1508 | int i; | |
1509 | int nbases = TYPE_N_BASECLASSES (type); | |
1510 | ||
1511 | CHECK_TYPEDEF (type); | |
1512 | ||
c5aa993b | 1513 | if (!looking_for_baseclass) |
c906108c SS |
1514 | for (i = TYPE_NFIELDS (type) - 1; i >= nbases; i--) |
1515 | { | |
1516 | char *t_field_name = TYPE_FIELD_NAME (type, i); | |
1517 | ||
db577aea | 1518 | if (t_field_name && (strcmp_iw (t_field_name, name) == 0)) |
c906108c | 1519 | { |
f23631e4 | 1520 | struct value *v; |
d6a843b5 | 1521 | if (field_is_static (&TYPE_FIELD (type, i))) |
2c2738a0 DC |
1522 | { |
1523 | v = value_static_field (type, i); | |
1524 | if (v == 0) | |
8a3fe4f8 | 1525 | error (_("field %s is nonexistent or has been optimised out"), |
2c2738a0 DC |
1526 | name); |
1527 | } | |
c906108c | 1528 | else |
2c2738a0 DC |
1529 | { |
1530 | v = value_primitive_field (arg1, offset, i, type); | |
1531 | if (v == 0) | |
8a3fe4f8 | 1532 | error (_("there is no field named %s"), name); |
2c2738a0 | 1533 | } |
c906108c SS |
1534 | return v; |
1535 | } | |
1536 | ||
1537 | if (t_field_name | |
1538 | && (t_field_name[0] == '\0' | |
1539 | || (TYPE_CODE (type) == TYPE_CODE_UNION | |
db577aea | 1540 | && (strcmp_iw (t_field_name, "else") == 0)))) |
c906108c SS |
1541 | { |
1542 | struct type *field_type = TYPE_FIELD_TYPE (type, i); | |
1543 | if (TYPE_CODE (field_type) == TYPE_CODE_UNION | |
1544 | || TYPE_CODE (field_type) == TYPE_CODE_STRUCT) | |
1545 | { | |
ac3eeb49 MS |
1546 | /* Look for a match through the fields of an anonymous |
1547 | union, or anonymous struct. C++ provides anonymous | |
1548 | unions. | |
c906108c | 1549 | |
1b831c93 AC |
1550 | In the GNU Chill (now deleted from GDB) |
1551 | implementation of variant record types, each | |
1552 | <alternative field> has an (anonymous) union type, | |
1553 | each member of the union represents a <variant | |
1554 | alternative>. Each <variant alternative> is | |
1555 | represented as a struct, with a member for each | |
1556 | <variant field>. */ | |
c5aa993b | 1557 | |
f23631e4 | 1558 | struct value *v; |
c906108c SS |
1559 | int new_offset = offset; |
1560 | ||
db034ac5 AC |
1561 | /* This is pretty gross. In G++, the offset in an |
1562 | anonymous union is relative to the beginning of the | |
1b831c93 AC |
1563 | enclosing struct. In the GNU Chill (now deleted |
1564 | from GDB) implementation of variant records, the | |
1565 | bitpos is zero in an anonymous union field, so we | |
ac3eeb49 | 1566 | have to add the offset of the union here. */ |
c906108c SS |
1567 | if (TYPE_CODE (field_type) == TYPE_CODE_STRUCT |
1568 | || (TYPE_NFIELDS (field_type) > 0 | |
1569 | && TYPE_FIELD_BITPOS (field_type, 0) == 0)) | |
1570 | new_offset += TYPE_FIELD_BITPOS (type, i) / 8; | |
1571 | ||
ac3eeb49 MS |
1572 | v = search_struct_field (name, arg1, new_offset, |
1573 | field_type, | |
c906108c SS |
1574 | looking_for_baseclass); |
1575 | if (v) | |
1576 | return v; | |
1577 | } | |
1578 | } | |
1579 | } | |
1580 | ||
c5aa993b | 1581 | for (i = 0; i < nbases; i++) |
c906108c | 1582 | { |
f23631e4 | 1583 | struct value *v; |
c906108c | 1584 | struct type *basetype = check_typedef (TYPE_BASECLASS (type, i)); |
ac3eeb49 MS |
1585 | /* If we are looking for baseclasses, this is what we get when |
1586 | we hit them. But it could happen that the base part's member | |
1587 | name is not yet filled in. */ | |
c906108c SS |
1588 | int found_baseclass = (looking_for_baseclass |
1589 | && TYPE_BASECLASS_NAME (type, i) != NULL | |
ac3eeb49 MS |
1590 | && (strcmp_iw (name, |
1591 | TYPE_BASECLASS_NAME (type, | |
1592 | i)) == 0)); | |
c906108c SS |
1593 | |
1594 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
1595 | { | |
1596 | int boffset; | |
3e3d7139 | 1597 | struct value *v2; |
c906108c SS |
1598 | |
1599 | boffset = baseclass_offset (type, i, | |
0fd88904 | 1600 | value_contents (arg1) + offset, |
42ae5230 | 1601 | value_address (arg1) + offset); |
c906108c | 1602 | if (boffset == -1) |
8a3fe4f8 | 1603 | error (_("virtual baseclass botch")); |
c906108c | 1604 | |
ac3eeb49 MS |
1605 | /* The virtual base class pointer might have been clobbered |
1606 | by the user program. Make sure that it still points to a | |
1607 | valid memory location. */ | |
c906108c SS |
1608 | |
1609 | boffset += offset; | |
1610 | if (boffset < 0 || boffset >= TYPE_LENGTH (type)) | |
1611 | { | |
1612 | CORE_ADDR base_addr; | |
c5aa993b | 1613 | |
3e3d7139 | 1614 | v2 = allocate_value (basetype); |
42ae5230 | 1615 | base_addr = value_address (arg1) + boffset; |
ac3eeb49 MS |
1616 | if (target_read_memory (base_addr, |
1617 | value_contents_raw (v2), | |
c906108c | 1618 | TYPE_LENGTH (basetype)) != 0) |
8a3fe4f8 | 1619 | error (_("virtual baseclass botch")); |
c906108c | 1620 | VALUE_LVAL (v2) = lval_memory; |
42ae5230 | 1621 | set_value_address (v2, base_addr); |
c906108c SS |
1622 | } |
1623 | else | |
1624 | { | |
3e3d7139 JG |
1625 | if (VALUE_LVAL (arg1) == lval_memory && value_lazy (arg1)) |
1626 | v2 = allocate_value_lazy (basetype); | |
1627 | else | |
1628 | { | |
1629 | v2 = allocate_value (basetype); | |
1630 | memcpy (value_contents_raw (v2), | |
1631 | value_contents_raw (arg1) + boffset, | |
1632 | TYPE_LENGTH (basetype)); | |
1633 | } | |
74bcbdf3 | 1634 | set_value_component_location (v2, arg1); |
65d3800a | 1635 | VALUE_FRAME_ID (v2) = VALUE_FRAME_ID (arg1); |
f5cf64a7 | 1636 | set_value_offset (v2, value_offset (arg1) + boffset); |
c906108c SS |
1637 | } |
1638 | ||
1639 | if (found_baseclass) | |
1640 | return v2; | |
ac3eeb49 MS |
1641 | v = search_struct_field (name, v2, 0, |
1642 | TYPE_BASECLASS (type, i), | |
c906108c SS |
1643 | looking_for_baseclass); |
1644 | } | |
1645 | else if (found_baseclass) | |
1646 | v = value_primitive_field (arg1, offset, i, type); | |
1647 | else | |
1648 | v = search_struct_field (name, arg1, | |
ac3eeb49 MS |
1649 | offset + TYPE_BASECLASS_BITPOS (type, |
1650 | i) / 8, | |
c906108c | 1651 | basetype, looking_for_baseclass); |
c5aa993b JM |
1652 | if (v) |
1653 | return v; | |
c906108c SS |
1654 | } |
1655 | return NULL; | |
1656 | } | |
1657 | ||
ac3eeb49 MS |
1658 | /* Helper function used by value_struct_elt to recurse through |
1659 | baseclasses. Look for a field NAME in ARG1. Adjust the address of | |
1660 | ARG1 by OFFSET bytes, and search in it assuming it has (class) type | |
1661 | TYPE. | |
1662 | ||
1663 | If found, return value, else if name matched and args not return | |
1664 | (value) -1, else return NULL. */ | |
c906108c | 1665 | |
f23631e4 AC |
1666 | static struct value * |
1667 | search_struct_method (char *name, struct value **arg1p, | |
1668 | struct value **args, int offset, | |
aa1ee363 | 1669 | int *static_memfuncp, struct type *type) |
c906108c SS |
1670 | { |
1671 | int i; | |
f23631e4 | 1672 | struct value *v; |
c906108c SS |
1673 | int name_matched = 0; |
1674 | char dem_opname[64]; | |
1675 | ||
1676 | CHECK_TYPEDEF (type); | |
1677 | for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; i--) | |
1678 | { | |
1679 | char *t_field_name = TYPE_FN_FIELDLIST_NAME (type, i); | |
1680 | /* FIXME! May need to check for ARM demangling here */ | |
c5aa993b JM |
1681 | if (strncmp (t_field_name, "__", 2) == 0 || |
1682 | strncmp (t_field_name, "op", 2) == 0 || | |
1683 | strncmp (t_field_name, "type", 4) == 0) | |
c906108c | 1684 | { |
c5aa993b JM |
1685 | if (cplus_demangle_opname (t_field_name, dem_opname, DMGL_ANSI)) |
1686 | t_field_name = dem_opname; | |
1687 | else if (cplus_demangle_opname (t_field_name, dem_opname, 0)) | |
c906108c | 1688 | t_field_name = dem_opname; |
c906108c | 1689 | } |
db577aea | 1690 | if (t_field_name && (strcmp_iw (t_field_name, name) == 0)) |
c906108c SS |
1691 | { |
1692 | int j = TYPE_FN_FIELDLIST_LENGTH (type, i) - 1; | |
1693 | struct fn_field *f = TYPE_FN_FIELDLIST1 (type, i); | |
c5aa993b | 1694 | name_matched = 1; |
c906108c | 1695 | |
de17c821 | 1696 | check_stub_method_group (type, i); |
c906108c | 1697 | if (j > 0 && args == 0) |
8a3fe4f8 | 1698 | error (_("cannot resolve overloaded method `%s': no arguments supplied"), name); |
acf5ed49 | 1699 | else if (j == 0 && args == 0) |
c906108c | 1700 | { |
acf5ed49 DJ |
1701 | v = value_fn_field (arg1p, f, j, type, offset); |
1702 | if (v != NULL) | |
1703 | return v; | |
c906108c | 1704 | } |
acf5ed49 DJ |
1705 | else |
1706 | while (j >= 0) | |
1707 | { | |
acf5ed49 | 1708 | if (!typecmp (TYPE_FN_FIELD_STATIC_P (f, j), |
ad2f7632 DJ |
1709 | TYPE_VARARGS (TYPE_FN_FIELD_TYPE (f, j)), |
1710 | TYPE_NFIELDS (TYPE_FN_FIELD_TYPE (f, j)), | |
acf5ed49 DJ |
1711 | TYPE_FN_FIELD_ARGS (f, j), args)) |
1712 | { | |
1713 | if (TYPE_FN_FIELD_VIRTUAL_P (f, j)) | |
ac3eeb49 MS |
1714 | return value_virtual_fn_field (arg1p, f, j, |
1715 | type, offset); | |
1716 | if (TYPE_FN_FIELD_STATIC_P (f, j) | |
1717 | && static_memfuncp) | |
acf5ed49 DJ |
1718 | *static_memfuncp = 1; |
1719 | v = value_fn_field (arg1p, f, j, type, offset); | |
1720 | if (v != NULL) | |
1721 | return v; | |
1722 | } | |
1723 | j--; | |
1724 | } | |
c906108c SS |
1725 | } |
1726 | } | |
1727 | ||
1728 | for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--) | |
1729 | { | |
1730 | int base_offset; | |
1731 | ||
1732 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
1733 | { | |
086280be UW |
1734 | struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i)); |
1735 | const gdb_byte *base_valaddr; | |
1736 | ||
1737 | /* The virtual base class pointer might have been | |
1738 | clobbered by the user program. Make sure that it | |
1739 | still points to a valid memory location. */ | |
1740 | ||
1741 | if (offset < 0 || offset >= TYPE_LENGTH (type)) | |
c5aa993b | 1742 | { |
086280be | 1743 | gdb_byte *tmp = alloca (TYPE_LENGTH (baseclass)); |
42ae5230 | 1744 | if (target_read_memory (value_address (*arg1p) + offset, |
086280be UW |
1745 | tmp, TYPE_LENGTH (baseclass)) != 0) |
1746 | error (_("virtual baseclass botch")); | |
1747 | base_valaddr = tmp; | |
c5aa993b JM |
1748 | } |
1749 | else | |
086280be | 1750 | base_valaddr = value_contents (*arg1p) + offset; |
c5aa993b | 1751 | |
086280be | 1752 | base_offset = baseclass_offset (type, i, base_valaddr, |
42ae5230 | 1753 | value_address (*arg1p) + offset); |
086280be UW |
1754 | if (base_offset == -1) |
1755 | error (_("virtual baseclass botch")); | |
c5aa993b | 1756 | } |
c906108c SS |
1757 | else |
1758 | { | |
1759 | base_offset = TYPE_BASECLASS_BITPOS (type, i) / 8; | |
c5aa993b | 1760 | } |
c906108c SS |
1761 | v = search_struct_method (name, arg1p, args, base_offset + offset, |
1762 | static_memfuncp, TYPE_BASECLASS (type, i)); | |
f23631e4 | 1763 | if (v == (struct value *) - 1) |
c906108c SS |
1764 | { |
1765 | name_matched = 1; | |
1766 | } | |
1767 | else if (v) | |
1768 | { | |
ac3eeb49 MS |
1769 | /* FIXME-bothner: Why is this commented out? Why is it here? */ |
1770 | /* *arg1p = arg1_tmp; */ | |
c906108c | 1771 | return v; |
c5aa993b | 1772 | } |
c906108c | 1773 | } |
c5aa993b | 1774 | if (name_matched) |
f23631e4 | 1775 | return (struct value *) - 1; |
c5aa993b JM |
1776 | else |
1777 | return NULL; | |
c906108c SS |
1778 | } |
1779 | ||
1780 | /* Given *ARGP, a value of type (pointer to a)* structure/union, | |
ac3eeb49 MS |
1781 | extract the component named NAME from the ultimate target |
1782 | structure/union and return it as a value with its appropriate type. | |
c906108c SS |
1783 | ERR is used in the error message if *ARGP's type is wrong. |
1784 | ||
1785 | C++: ARGS is a list of argument types to aid in the selection of | |
1786 | an appropriate method. Also, handle derived types. | |
1787 | ||
1788 | STATIC_MEMFUNCP, if non-NULL, points to a caller-supplied location | |
1789 | where the truthvalue of whether the function that was resolved was | |
1790 | a static member function or not is stored. | |
1791 | ||
ac3eeb49 MS |
1792 | ERR is an error message to be printed in case the field is not |
1793 | found. */ | |
c906108c | 1794 | |
f23631e4 AC |
1795 | struct value * |
1796 | value_struct_elt (struct value **argp, struct value **args, | |
fba45db2 | 1797 | char *name, int *static_memfuncp, char *err) |
c906108c | 1798 | { |
52f0bd74 | 1799 | struct type *t; |
f23631e4 | 1800 | struct value *v; |
c906108c | 1801 | |
994b9211 | 1802 | *argp = coerce_array (*argp); |
c906108c | 1803 | |
df407dfe | 1804 | t = check_typedef (value_type (*argp)); |
c906108c SS |
1805 | |
1806 | /* Follow pointers until we get to a non-pointer. */ | |
1807 | ||
1808 | while (TYPE_CODE (t) == TYPE_CODE_PTR || TYPE_CODE (t) == TYPE_CODE_REF) | |
1809 | { | |
1810 | *argp = value_ind (*argp); | |
1811 | /* Don't coerce fn pointer to fn and then back again! */ | |
df407dfe | 1812 | if (TYPE_CODE (value_type (*argp)) != TYPE_CODE_FUNC) |
994b9211 | 1813 | *argp = coerce_array (*argp); |
df407dfe | 1814 | t = check_typedef (value_type (*argp)); |
c906108c SS |
1815 | } |
1816 | ||
c5aa993b | 1817 | if (TYPE_CODE (t) != TYPE_CODE_STRUCT |
c906108c | 1818 | && TYPE_CODE (t) != TYPE_CODE_UNION) |
8a3fe4f8 | 1819 | error (_("Attempt to extract a component of a value that is not a %s."), err); |
c906108c SS |
1820 | |
1821 | /* Assume it's not, unless we see that it is. */ | |
1822 | if (static_memfuncp) | |
c5aa993b | 1823 | *static_memfuncp = 0; |
c906108c SS |
1824 | |
1825 | if (!args) | |
1826 | { | |
1827 | /* if there are no arguments ...do this... */ | |
1828 | ||
ac3eeb49 MS |
1829 | /* Try as a field first, because if we succeed, there is less |
1830 | work to be done. */ | |
c906108c SS |
1831 | v = search_struct_field (name, *argp, 0, t, 0); |
1832 | if (v) | |
1833 | return v; | |
1834 | ||
1835 | /* C++: If it was not found as a data field, then try to | |
7b83ea04 | 1836 | return it as a pointer to a method. */ |
ac3eeb49 MS |
1837 | v = search_struct_method (name, argp, args, 0, |
1838 | static_memfuncp, t); | |
c906108c | 1839 | |
f23631e4 | 1840 | if (v == (struct value *) - 1) |
55b39184 | 1841 | error (_("Cannot take address of method %s."), name); |
c906108c SS |
1842 | else if (v == 0) |
1843 | { | |
1844 | if (TYPE_NFN_FIELDS (t)) | |
8a3fe4f8 | 1845 | error (_("There is no member or method named %s."), name); |
c906108c | 1846 | else |
8a3fe4f8 | 1847 | error (_("There is no member named %s."), name); |
c906108c SS |
1848 | } |
1849 | return v; | |
1850 | } | |
1851 | ||
ac3eeb49 MS |
1852 | v = search_struct_method (name, argp, args, 0, |
1853 | static_memfuncp, t); | |
7168a814 | 1854 | |
f23631e4 | 1855 | if (v == (struct value *) - 1) |
c906108c | 1856 | { |
8a3fe4f8 | 1857 | error (_("One of the arguments you tried to pass to %s could not be converted to what the function wants."), name); |
c906108c SS |
1858 | } |
1859 | else if (v == 0) | |
1860 | { | |
ac3eeb49 MS |
1861 | /* See if user tried to invoke data as function. If so, hand it |
1862 | back. If it's not callable (i.e., a pointer to function), | |
7b83ea04 | 1863 | gdb should give an error. */ |
c906108c | 1864 | v = search_struct_field (name, *argp, 0, t, 0); |
fa8de41e TT |
1865 | /* If we found an ordinary field, then it is not a method call. |
1866 | So, treat it as if it were a static member function. */ | |
1867 | if (v && static_memfuncp) | |
1868 | *static_memfuncp = 1; | |
c906108c SS |
1869 | } |
1870 | ||
1871 | if (!v) | |
8a3fe4f8 | 1872 | error (_("Structure has no component named %s."), name); |
c906108c SS |
1873 | return v; |
1874 | } | |
1875 | ||
ac3eeb49 | 1876 | /* Search through the methods of an object (and its bases) to find a |
cfe9eade | 1877 | specified method. Return the pointer to the fn_field list of |
ac3eeb49 MS |
1878 | overloaded instances. |
1879 | ||
1880 | Helper function for value_find_oload_list. | |
1881 | ARGP is a pointer to a pointer to a value (the object). | |
1882 | METHOD is a string containing the method name. | |
1883 | OFFSET is the offset within the value. | |
1884 | TYPE is the assumed type of the object. | |
1885 | NUM_FNS is the number of overloaded instances. | |
1886 | BASETYPE is set to the actual type of the subobject where the | |
1887 | method is found. | |
1888 | BOFFSET is the offset of the base subobject where the method is found. | |
1889 | */ | |
c906108c | 1890 | |
7a292a7a | 1891 | static struct fn_field * |
ac3eeb49 MS |
1892 | find_method_list (struct value **argp, char *method, |
1893 | int offset, struct type *type, int *num_fns, | |
fba45db2 | 1894 | struct type **basetype, int *boffset) |
c906108c SS |
1895 | { |
1896 | int i; | |
c5aa993b | 1897 | struct fn_field *f; |
c906108c SS |
1898 | CHECK_TYPEDEF (type); |
1899 | ||
1900 | *num_fns = 0; | |
1901 | ||
ac3eeb49 | 1902 | /* First check in object itself. */ |
c5aa993b | 1903 | for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; i--) |
c906108c | 1904 | { |
ac3eeb49 | 1905 | /* pai: FIXME What about operators and type conversions? */ |
c5aa993b | 1906 | char *fn_field_name = TYPE_FN_FIELDLIST_NAME (type, i); |
db577aea | 1907 | if (fn_field_name && (strcmp_iw (fn_field_name, method) == 0)) |
c5aa993b | 1908 | { |
4a1970e4 DJ |
1909 | int len = TYPE_FN_FIELDLIST_LENGTH (type, i); |
1910 | struct fn_field *f = TYPE_FN_FIELDLIST1 (type, i); | |
4a1970e4 DJ |
1911 | |
1912 | *num_fns = len; | |
c5aa993b JM |
1913 | *basetype = type; |
1914 | *boffset = offset; | |
4a1970e4 | 1915 | |
de17c821 DJ |
1916 | /* Resolve any stub methods. */ |
1917 | check_stub_method_group (type, i); | |
4a1970e4 DJ |
1918 | |
1919 | return f; | |
c5aa993b JM |
1920 | } |
1921 | } | |
1922 | ||
ac3eeb49 | 1923 | /* Not found in object, check in base subobjects. */ |
c906108c SS |
1924 | for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--) |
1925 | { | |
1926 | int base_offset; | |
1927 | if (BASETYPE_VIA_VIRTUAL (type, i)) | |
1928 | { | |
086280be UW |
1929 | base_offset = value_offset (*argp) + offset; |
1930 | base_offset = baseclass_offset (type, i, | |
1931 | value_contents (*argp) + base_offset, | |
42ae5230 | 1932 | value_address (*argp) + base_offset); |
086280be UW |
1933 | if (base_offset == -1) |
1934 | error (_("virtual baseclass botch")); | |
c5aa993b | 1935 | } |
ac3eeb49 MS |
1936 | else /* Non-virtual base, simply use bit position from debug |
1937 | info. */ | |
c906108c SS |
1938 | { |
1939 | base_offset = TYPE_BASECLASS_BITPOS (type, i) / 8; | |
c5aa993b | 1940 | } |
c906108c | 1941 | f = find_method_list (argp, method, base_offset + offset, |
ac3eeb49 MS |
1942 | TYPE_BASECLASS (type, i), num_fns, |
1943 | basetype, boffset); | |
c906108c | 1944 | if (f) |
c5aa993b | 1945 | return f; |
c906108c | 1946 | } |
c5aa993b | 1947 | return NULL; |
c906108c SS |
1948 | } |
1949 | ||
1950 | /* Return the list of overloaded methods of a specified name. | |
ac3eeb49 MS |
1951 | |
1952 | ARGP is a pointer to a pointer to a value (the object). | |
1953 | METHOD is the method name. | |
1954 | OFFSET is the offset within the value contents. | |
1955 | NUM_FNS is the number of overloaded instances. | |
1956 | BASETYPE is set to the type of the base subobject that defines the | |
1957 | method. | |
1958 | BOFFSET is the offset of the base subobject which defines the method. | |
1959 | */ | |
c906108c SS |
1960 | |
1961 | struct fn_field * | |
ac3eeb49 MS |
1962 | value_find_oload_method_list (struct value **argp, char *method, |
1963 | int offset, int *num_fns, | |
1964 | struct type **basetype, int *boffset) | |
c906108c | 1965 | { |
c5aa993b | 1966 | struct type *t; |
c906108c | 1967 | |
df407dfe | 1968 | t = check_typedef (value_type (*argp)); |
c906108c | 1969 | |
ac3eeb49 | 1970 | /* Code snarfed from value_struct_elt. */ |
c906108c SS |
1971 | while (TYPE_CODE (t) == TYPE_CODE_PTR || TYPE_CODE (t) == TYPE_CODE_REF) |
1972 | { | |
1973 | *argp = value_ind (*argp); | |
1974 | /* Don't coerce fn pointer to fn and then back again! */ | |
df407dfe | 1975 | if (TYPE_CODE (value_type (*argp)) != TYPE_CODE_FUNC) |
994b9211 | 1976 | *argp = coerce_array (*argp); |
df407dfe | 1977 | t = check_typedef (value_type (*argp)); |
c906108c | 1978 | } |
c5aa993b | 1979 | |
c5aa993b JM |
1980 | if (TYPE_CODE (t) != TYPE_CODE_STRUCT |
1981 | && TYPE_CODE (t) != TYPE_CODE_UNION) | |
8a3fe4f8 | 1982 | error (_("Attempt to extract a component of a value that is not a struct or union")); |
c5aa993b | 1983 | |
ac3eeb49 MS |
1984 | return find_method_list (argp, method, 0, t, num_fns, |
1985 | basetype, boffset); | |
c906108c SS |
1986 | } |
1987 | ||
1988 | /* Given an array of argument types (ARGTYPES) (which includes an | |
1989 | entry for "this" in the case of C++ methods), the number of | |
1990 | arguments NARGS, the NAME of a function whether it's a method or | |
1991 | not (METHOD), and the degree of laxness (LAX) in conforming to | |
1992 | overload resolution rules in ANSI C++, find the best function that | |
1993 | matches on the argument types according to the overload resolution | |
1994 | rules. | |
1995 | ||
1996 | In the case of class methods, the parameter OBJ is an object value | |
1997 | in which to search for overloaded methods. | |
1998 | ||
1999 | In the case of non-method functions, the parameter FSYM is a symbol | |
2000 | corresponding to one of the overloaded functions. | |
2001 | ||
2002 | Return value is an integer: 0 -> good match, 10 -> debugger applied | |
2003 | non-standard coercions, 100 -> incompatible. | |
2004 | ||
2005 | If a method is being searched for, VALP will hold the value. | |
ac3eeb49 MS |
2006 | If a non-method is being searched for, SYMP will hold the symbol |
2007 | for it. | |
c906108c SS |
2008 | |
2009 | If a method is being searched for, and it is a static method, | |
2010 | then STATICP will point to a non-zero value. | |
2011 | ||
2012 | Note: This function does *not* check the value of | |
2013 | overload_resolution. Caller must check it to see whether overload | |
2014 | resolution is permitted. | |
ac3eeb49 | 2015 | */ |
c906108c SS |
2016 | |
2017 | int | |
ac3eeb49 MS |
2018 | find_overload_match (struct type **arg_types, int nargs, |
2019 | char *name, int method, int lax, | |
2020 | struct value **objp, struct symbol *fsym, | |
2021 | struct value **valp, struct symbol **symp, | |
2022 | int *staticp) | |
c906108c | 2023 | { |
7f8c9282 | 2024 | struct value *obj = (objp ? *objp : NULL); |
ac3eeb49 MS |
2025 | /* Index of best overloaded function. */ |
2026 | int oload_champ; | |
2027 | /* The measure for the current best match. */ | |
2028 | struct badness_vector *oload_champ_bv = NULL; | |
f23631e4 | 2029 | struct value *temp = obj; |
ac3eeb49 MS |
2030 | /* For methods, the list of overloaded methods. */ |
2031 | struct fn_field *fns_ptr = NULL; | |
2032 | /* For non-methods, the list of overloaded function symbols. */ | |
2033 | struct symbol **oload_syms = NULL; | |
2034 | /* Number of overloaded instances being considered. */ | |
2035 | int num_fns = 0; | |
c5aa993b | 2036 | struct type *basetype = NULL; |
c906108c | 2037 | int boffset; |
52f0bd74 | 2038 | int ix; |
4a1970e4 | 2039 | int static_offset; |
8d577d32 | 2040 | struct cleanup *old_cleanups = NULL; |
c906108c | 2041 | |
8d577d32 | 2042 | const char *obj_type_name = NULL; |
c5aa993b | 2043 | char *func_name = NULL; |
8d577d32 | 2044 | enum oload_classification match_quality; |
c906108c | 2045 | |
ac3eeb49 | 2046 | /* Get the list of overloaded methods or functions. */ |
c906108c SS |
2047 | if (method) |
2048 | { | |
a2ca50ae | 2049 | gdb_assert (obj); |
df407dfe | 2050 | obj_type_name = TYPE_NAME (value_type (obj)); |
c906108c | 2051 | /* Hack: evaluate_subexp_standard often passes in a pointer |
ac3eeb49 MS |
2052 | value rather than the object itself, so try again. */ |
2053 | if ((!obj_type_name || !*obj_type_name) | |
2054 | && (TYPE_CODE (value_type (obj)) == TYPE_CODE_PTR)) | |
df407dfe | 2055 | obj_type_name = TYPE_NAME (TYPE_TARGET_TYPE (value_type (obj))); |
c906108c | 2056 | |
ac3eeb49 MS |
2057 | fns_ptr = value_find_oload_method_list (&temp, name, |
2058 | 0, &num_fns, | |
c5aa993b | 2059 | &basetype, &boffset); |
c906108c | 2060 | if (!fns_ptr || !num_fns) |
8a3fe4f8 | 2061 | error (_("Couldn't find method %s%s%s"), |
c5aa993b JM |
2062 | obj_type_name, |
2063 | (obj_type_name && *obj_type_name) ? "::" : "", | |
2064 | name); | |
4a1970e4 | 2065 | /* If we are dealing with stub method types, they should have |
ac3eeb49 MS |
2066 | been resolved by find_method_list via |
2067 | value_find_oload_method_list above. */ | |
4a1970e4 | 2068 | gdb_assert (TYPE_DOMAIN_TYPE (fns_ptr[0].type) != NULL); |
ac3eeb49 MS |
2069 | oload_champ = find_oload_champ (arg_types, nargs, method, |
2070 | num_fns, fns_ptr, | |
2071 | oload_syms, &oload_champ_bv); | |
c906108c SS |
2072 | } |
2073 | else | |
2074 | { | |
8d577d32 | 2075 | const char *qualified_name = SYMBOL_CPLUS_DEMANGLED_NAME (fsym); |
c906108c | 2076 | |
d9639e13 DJ |
2077 | /* If we have a C++ name, try to extract just the function |
2078 | part. */ | |
2079 | if (qualified_name) | |
2080 | func_name = cp_func_name (qualified_name); | |
2081 | ||
2082 | /* If there was no C++ name, this must be a C-style function. | |
2083 | Just return the same symbol. Do the same if cp_func_name | |
2084 | fails for some reason. */ | |
8d577d32 | 2085 | if (func_name == NULL) |
7b83ea04 | 2086 | { |
917317f4 | 2087 | *symp = fsym; |
7b83ea04 AC |
2088 | return 0; |
2089 | } | |
917317f4 | 2090 | |
8d577d32 DC |
2091 | old_cleanups = make_cleanup (xfree, func_name); |
2092 | make_cleanup (xfree, oload_syms); | |
2093 | make_cleanup (xfree, oload_champ_bv); | |
2094 | ||
2095 | oload_champ = find_oload_champ_namespace (arg_types, nargs, | |
2096 | func_name, | |
2097 | qualified_name, | |
2098 | &oload_syms, | |
2099 | &oload_champ_bv); | |
2100 | } | |
2101 | ||
2102 | /* Check how bad the best match is. */ | |
2103 | ||
ac3eeb49 MS |
2104 | match_quality = |
2105 | classify_oload_match (oload_champ_bv, nargs, | |
2106 | oload_method_static (method, fns_ptr, | |
2107 | oload_champ)); | |
8d577d32 DC |
2108 | |
2109 | if (match_quality == INCOMPATIBLE) | |
2110 | { | |
2111 | if (method) | |
8a3fe4f8 | 2112 | error (_("Cannot resolve method %s%s%s to any overloaded instance"), |
8d577d32 DC |
2113 | obj_type_name, |
2114 | (obj_type_name && *obj_type_name) ? "::" : "", | |
2115 | name); | |
2116 | else | |
8a3fe4f8 | 2117 | error (_("Cannot resolve function %s to any overloaded instance"), |
8d577d32 DC |
2118 | func_name); |
2119 | } | |
2120 | else if (match_quality == NON_STANDARD) | |
2121 | { | |
2122 | if (method) | |
8a3fe4f8 | 2123 | warning (_("Using non-standard conversion to match method %s%s%s to supplied arguments"), |
8d577d32 DC |
2124 | obj_type_name, |
2125 | (obj_type_name && *obj_type_name) ? "::" : "", | |
2126 | name); | |
2127 | else | |
8a3fe4f8 | 2128 | warning (_("Using non-standard conversion to match function %s to supplied arguments"), |
8d577d32 DC |
2129 | func_name); |
2130 | } | |
2131 | ||
2132 | if (method) | |
2133 | { | |
2134 | if (staticp != NULL) | |
2135 | *staticp = oload_method_static (method, fns_ptr, oload_champ); | |
2136 | if (TYPE_FN_FIELD_VIRTUAL_P (fns_ptr, oload_champ)) | |
ac3eeb49 MS |
2137 | *valp = value_virtual_fn_field (&temp, fns_ptr, oload_champ, |
2138 | basetype, boffset); | |
8d577d32 | 2139 | else |
ac3eeb49 MS |
2140 | *valp = value_fn_field (&temp, fns_ptr, oload_champ, |
2141 | basetype, boffset); | |
8d577d32 DC |
2142 | } |
2143 | else | |
2144 | { | |
2145 | *symp = oload_syms[oload_champ]; | |
2146 | } | |
2147 | ||
2148 | if (objp) | |
2149 | { | |
a4295225 TT |
2150 | struct type *temp_type = check_typedef (value_type (temp)); |
2151 | struct type *obj_type = check_typedef (value_type (*objp)); | |
2152 | if (TYPE_CODE (temp_type) != TYPE_CODE_PTR | |
2153 | && (TYPE_CODE (obj_type) == TYPE_CODE_PTR | |
2154 | || TYPE_CODE (obj_type) == TYPE_CODE_REF)) | |
8d577d32 DC |
2155 | { |
2156 | temp = value_addr (temp); | |
2157 | } | |
2158 | *objp = temp; | |
2159 | } | |
2160 | if (old_cleanups != NULL) | |
2161 | do_cleanups (old_cleanups); | |
2162 | ||
2163 | switch (match_quality) | |
2164 | { | |
2165 | case INCOMPATIBLE: | |
2166 | return 100; | |
2167 | case NON_STANDARD: | |
2168 | return 10; | |
2169 | default: /* STANDARD */ | |
2170 | return 0; | |
2171 | } | |
2172 | } | |
2173 | ||
2174 | /* Find the best overload match, searching for FUNC_NAME in namespaces | |
2175 | contained in QUALIFIED_NAME until it either finds a good match or | |
2176 | runs out of namespaces. It stores the overloaded functions in | |
2177 | *OLOAD_SYMS, and the badness vector in *OLOAD_CHAMP_BV. The | |
2178 | calling function is responsible for freeing *OLOAD_SYMS and | |
2179 | *OLOAD_CHAMP_BV. */ | |
2180 | ||
2181 | static int | |
2182 | find_oload_champ_namespace (struct type **arg_types, int nargs, | |
2183 | const char *func_name, | |
2184 | const char *qualified_name, | |
2185 | struct symbol ***oload_syms, | |
2186 | struct badness_vector **oload_champ_bv) | |
2187 | { | |
2188 | int oload_champ; | |
2189 | ||
2190 | find_oload_champ_namespace_loop (arg_types, nargs, | |
2191 | func_name, | |
2192 | qualified_name, 0, | |
2193 | oload_syms, oload_champ_bv, | |
2194 | &oload_champ); | |
2195 | ||
2196 | return oload_champ; | |
2197 | } | |
2198 | ||
2199 | /* Helper function for find_oload_champ_namespace; NAMESPACE_LEN is | |
2200 | how deep we've looked for namespaces, and the champ is stored in | |
2201 | OLOAD_CHAMP. The return value is 1 if the champ is a good one, 0 | |
2202 | if it isn't. | |
2203 | ||
2204 | It is the caller's responsibility to free *OLOAD_SYMS and | |
2205 | *OLOAD_CHAMP_BV. */ | |
2206 | ||
2207 | static int | |
2208 | find_oload_champ_namespace_loop (struct type **arg_types, int nargs, | |
2209 | const char *func_name, | |
2210 | const char *qualified_name, | |
2211 | int namespace_len, | |
2212 | struct symbol ***oload_syms, | |
2213 | struct badness_vector **oload_champ_bv, | |
2214 | int *oload_champ) | |
2215 | { | |
2216 | int next_namespace_len = namespace_len; | |
2217 | int searched_deeper = 0; | |
2218 | int num_fns = 0; | |
2219 | struct cleanup *old_cleanups; | |
2220 | int new_oload_champ; | |
2221 | struct symbol **new_oload_syms; | |
2222 | struct badness_vector *new_oload_champ_bv; | |
2223 | char *new_namespace; | |
2224 | ||
2225 | if (next_namespace_len != 0) | |
2226 | { | |
2227 | gdb_assert (qualified_name[next_namespace_len] == ':'); | |
2228 | next_namespace_len += 2; | |
c906108c | 2229 | } |
ac3eeb49 MS |
2230 | next_namespace_len += |
2231 | cp_find_first_component (qualified_name + next_namespace_len); | |
8d577d32 DC |
2232 | |
2233 | /* Initialize these to values that can safely be xfree'd. */ | |
2234 | *oload_syms = NULL; | |
2235 | *oload_champ_bv = NULL; | |
c5aa993b | 2236 | |
ac3eeb49 MS |
2237 | /* First, see if we have a deeper namespace we can search in. |
2238 | If we get a good match there, use it. */ | |
8d577d32 DC |
2239 | |
2240 | if (qualified_name[next_namespace_len] == ':') | |
2241 | { | |
2242 | searched_deeper = 1; | |
2243 | ||
2244 | if (find_oload_champ_namespace_loop (arg_types, nargs, | |
2245 | func_name, qualified_name, | |
2246 | next_namespace_len, | |
2247 | oload_syms, oload_champ_bv, | |
2248 | oload_champ)) | |
2249 | { | |
2250 | return 1; | |
2251 | } | |
2252 | }; | |
2253 | ||
2254 | /* If we reach here, either we're in the deepest namespace or we | |
2255 | didn't find a good match in a deeper namespace. But, in the | |
2256 | latter case, we still have a bad match in a deeper namespace; | |
2257 | note that we might not find any match at all in the current | |
2258 | namespace. (There's always a match in the deepest namespace, | |
2259 | because this overload mechanism only gets called if there's a | |
2260 | function symbol to start off with.) */ | |
2261 | ||
2262 | old_cleanups = make_cleanup (xfree, *oload_syms); | |
2263 | old_cleanups = make_cleanup (xfree, *oload_champ_bv); | |
2264 | new_namespace = alloca (namespace_len + 1); | |
2265 | strncpy (new_namespace, qualified_name, namespace_len); | |
2266 | new_namespace[namespace_len] = '\0'; | |
2267 | new_oload_syms = make_symbol_overload_list (func_name, | |
2268 | new_namespace); | |
2269 | while (new_oload_syms[num_fns]) | |
2270 | ++num_fns; | |
2271 | ||
2272 | new_oload_champ = find_oload_champ (arg_types, nargs, 0, num_fns, | |
2273 | NULL, new_oload_syms, | |
2274 | &new_oload_champ_bv); | |
2275 | ||
2276 | /* Case 1: We found a good match. Free earlier matches (if any), | |
2277 | and return it. Case 2: We didn't find a good match, but we're | |
2278 | not the deepest function. Then go with the bad match that the | |
2279 | deeper function found. Case 3: We found a bad match, and we're | |
2280 | the deepest function. Then return what we found, even though | |
2281 | it's a bad match. */ | |
2282 | ||
2283 | if (new_oload_champ != -1 | |
2284 | && classify_oload_match (new_oload_champ_bv, nargs, 0) == STANDARD) | |
2285 | { | |
2286 | *oload_syms = new_oload_syms; | |
2287 | *oload_champ = new_oload_champ; | |
2288 | *oload_champ_bv = new_oload_champ_bv; | |
2289 | do_cleanups (old_cleanups); | |
2290 | return 1; | |
2291 | } | |
2292 | else if (searched_deeper) | |
2293 | { | |
2294 | xfree (new_oload_syms); | |
2295 | xfree (new_oload_champ_bv); | |
2296 | discard_cleanups (old_cleanups); | |
2297 | return 0; | |
2298 | } | |
2299 | else | |
2300 | { | |
2301 | gdb_assert (new_oload_champ != -1); | |
2302 | *oload_syms = new_oload_syms; | |
2303 | *oload_champ = new_oload_champ; | |
2304 | *oload_champ_bv = new_oload_champ_bv; | |
2305 | discard_cleanups (old_cleanups); | |
2306 | return 0; | |
2307 | } | |
2308 | } | |
2309 | ||
2310 | /* Look for a function to take NARGS args of types ARG_TYPES. Find | |
2311 | the best match from among the overloaded methods or functions | |
2312 | (depending on METHOD) given by FNS_PTR or OLOAD_SYMS, respectively. | |
2313 | The number of methods/functions in the list is given by NUM_FNS. | |
2314 | Return the index of the best match; store an indication of the | |
2315 | quality of the match in OLOAD_CHAMP_BV. | |
2316 | ||
2317 | It is the caller's responsibility to free *OLOAD_CHAMP_BV. */ | |
2318 | ||
2319 | static int | |
2320 | find_oload_champ (struct type **arg_types, int nargs, int method, | |
2321 | int num_fns, struct fn_field *fns_ptr, | |
2322 | struct symbol **oload_syms, | |
2323 | struct badness_vector **oload_champ_bv) | |
2324 | { | |
2325 | int ix; | |
ac3eeb49 MS |
2326 | /* A measure of how good an overloaded instance is. */ |
2327 | struct badness_vector *bv; | |
2328 | /* Index of best overloaded function. */ | |
2329 | int oload_champ = -1; | |
2330 | /* Current ambiguity state for overload resolution. */ | |
2331 | int oload_ambiguous = 0; | |
2332 | /* 0 => no ambiguity, 1 => two good funcs, 2 => incomparable funcs. */ | |
8d577d32 DC |
2333 | |
2334 | *oload_champ_bv = NULL; | |
c906108c | 2335 | |
ac3eeb49 | 2336 | /* Consider each candidate in turn. */ |
c906108c SS |
2337 | for (ix = 0; ix < num_fns; ix++) |
2338 | { | |
8d577d32 DC |
2339 | int jj; |
2340 | int static_offset = oload_method_static (method, fns_ptr, ix); | |
2341 | int nparms; | |
2342 | struct type **parm_types; | |
2343 | ||
db577aea AC |
2344 | if (method) |
2345 | { | |
ad2f7632 | 2346 | nparms = TYPE_NFIELDS (TYPE_FN_FIELD_TYPE (fns_ptr, ix)); |
db577aea AC |
2347 | } |
2348 | else | |
2349 | { | |
ac3eeb49 MS |
2350 | /* If it's not a method, this is the proper place. */ |
2351 | nparms = TYPE_NFIELDS (SYMBOL_TYPE (oload_syms[ix])); | |
db577aea | 2352 | } |
c906108c | 2353 | |
ac3eeb49 MS |
2354 | /* Prepare array of parameter types. */ |
2355 | parm_types = (struct type **) | |
2356 | xmalloc (nparms * (sizeof (struct type *))); | |
c906108c | 2357 | for (jj = 0; jj < nparms; jj++) |
db577aea | 2358 | parm_types[jj] = (method |
ad2f7632 | 2359 | ? (TYPE_FN_FIELD_ARGS (fns_ptr, ix)[jj].type) |
ac3eeb49 MS |
2360 | : TYPE_FIELD_TYPE (SYMBOL_TYPE (oload_syms[ix]), |
2361 | jj)); | |
c906108c | 2362 | |
ac3eeb49 MS |
2363 | /* Compare parameter types to supplied argument types. Skip |
2364 | THIS for static methods. */ | |
2365 | bv = rank_function (parm_types, nparms, | |
2366 | arg_types + static_offset, | |
4a1970e4 | 2367 | nargs - static_offset); |
c5aa993b | 2368 | |
8d577d32 | 2369 | if (!*oload_champ_bv) |
c5aa993b | 2370 | { |
8d577d32 | 2371 | *oload_champ_bv = bv; |
c5aa993b | 2372 | oload_champ = 0; |
c5aa993b | 2373 | } |
ac3eeb49 MS |
2374 | else /* See whether current candidate is better or worse than |
2375 | previous best. */ | |
8d577d32 | 2376 | switch (compare_badness (bv, *oload_champ_bv)) |
c5aa993b | 2377 | { |
ac3eeb49 MS |
2378 | case 0: /* Top two contenders are equally good. */ |
2379 | oload_ambiguous = 1; | |
c5aa993b | 2380 | break; |
ac3eeb49 MS |
2381 | case 1: /* Incomparable top contenders. */ |
2382 | oload_ambiguous = 2; | |
c5aa993b | 2383 | break; |
ac3eeb49 MS |
2384 | case 2: /* New champion, record details. */ |
2385 | *oload_champ_bv = bv; | |
c5aa993b JM |
2386 | oload_ambiguous = 0; |
2387 | oload_champ = ix; | |
c5aa993b JM |
2388 | break; |
2389 | case 3: | |
2390 | default: | |
2391 | break; | |
2392 | } | |
b8c9b27d | 2393 | xfree (parm_types); |
6b1ba9a0 ND |
2394 | if (overload_debug) |
2395 | { | |
2396 | if (method) | |
ac3eeb49 MS |
2397 | fprintf_filtered (gdb_stderr, |
2398 | "Overloaded method instance %s, # of parms %d\n", | |
2399 | fns_ptr[ix].physname, nparms); | |
6b1ba9a0 | 2400 | else |
ac3eeb49 MS |
2401 | fprintf_filtered (gdb_stderr, |
2402 | "Overloaded function instance %s # of parms %d\n", | |
2403 | SYMBOL_DEMANGLED_NAME (oload_syms[ix]), | |
2404 | nparms); | |
4a1970e4 | 2405 | for (jj = 0; jj < nargs - static_offset; jj++) |
ac3eeb49 MS |
2406 | fprintf_filtered (gdb_stderr, |
2407 | "...Badness @ %d : %d\n", | |
2408 | jj, bv->rank[jj]); | |
2409 | fprintf_filtered (gdb_stderr, | |
2410 | "Overload resolution champion is %d, ambiguous? %d\n", | |
2411 | oload_champ, oload_ambiguous); | |
6b1ba9a0 | 2412 | } |
c906108c SS |
2413 | } |
2414 | ||
8d577d32 DC |
2415 | return oload_champ; |
2416 | } | |
6b1ba9a0 | 2417 | |
8d577d32 DC |
2418 | /* Return 1 if we're looking at a static method, 0 if we're looking at |
2419 | a non-static method or a function that isn't a method. */ | |
c906108c | 2420 | |
8d577d32 DC |
2421 | static int |
2422 | oload_method_static (int method, struct fn_field *fns_ptr, int index) | |
2423 | { | |
2424 | if (method && TYPE_FN_FIELD_STATIC_P (fns_ptr, index)) | |
2425 | return 1; | |
c906108c | 2426 | else |
8d577d32 DC |
2427 | return 0; |
2428 | } | |
c906108c | 2429 | |
8d577d32 DC |
2430 | /* Check how good an overload match OLOAD_CHAMP_BV represents. */ |
2431 | ||
2432 | static enum oload_classification | |
2433 | classify_oload_match (struct badness_vector *oload_champ_bv, | |
2434 | int nargs, | |
2435 | int static_offset) | |
2436 | { | |
2437 | int ix; | |
2438 | ||
2439 | for (ix = 1; ix <= nargs - static_offset; ix++) | |
7f8c9282 | 2440 | { |
8d577d32 | 2441 | if (oload_champ_bv->rank[ix] >= 100) |
ac3eeb49 | 2442 | return INCOMPATIBLE; /* Truly mismatched types. */ |
8d577d32 | 2443 | else if (oload_champ_bv->rank[ix] >= 10) |
ac3eeb49 MS |
2444 | return NON_STANDARD; /* Non-standard type conversions |
2445 | needed. */ | |
7f8c9282 | 2446 | } |
02f0d45d | 2447 | |
8d577d32 | 2448 | return STANDARD; /* Only standard conversions needed. */ |
c906108c SS |
2449 | } |
2450 | ||
ac3eeb49 MS |
2451 | /* C++: return 1 is NAME is a legitimate name for the destructor of |
2452 | type TYPE. If TYPE does not have a destructor, or if NAME is | |
2453 | inappropriate for TYPE, an error is signaled. */ | |
c906108c | 2454 | int |
fba45db2 | 2455 | destructor_name_p (const char *name, const struct type *type) |
c906108c | 2456 | { |
c906108c SS |
2457 | if (name[0] == '~') |
2458 | { | |
2459 | char *dname = type_name_no_tag (type); | |
2460 | char *cp = strchr (dname, '<'); | |
2461 | unsigned int len; | |
2462 | ||
2463 | /* Do not compare the template part for template classes. */ | |
2464 | if (cp == NULL) | |
2465 | len = strlen (dname); | |
2466 | else | |
2467 | len = cp - dname; | |
bf896cb0 | 2468 | if (strlen (name + 1) != len || strncmp (dname, name + 1, len) != 0) |
8a3fe4f8 | 2469 | error (_("name of destructor must equal name of class")); |
c906108c SS |
2470 | else |
2471 | return 1; | |
2472 | } | |
2473 | return 0; | |
2474 | } | |
2475 | ||
2b2d9e11 | 2476 | /* Given TYPE, a structure/union, |
ac3eeb49 MS |
2477 | return 1 if the component named NAME from the ultimate target |
2478 | structure/union is defined, otherwise, return 0. */ | |
c906108c | 2479 | |
2b2d9e11 VP |
2480 | int |
2481 | check_field (struct type *type, const char *name) | |
c906108c | 2482 | { |
52f0bd74 | 2483 | int i; |
c906108c SS |
2484 | |
2485 | for (i = TYPE_NFIELDS (type) - 1; i >= TYPE_N_BASECLASSES (type); i--) | |
2486 | { | |
2487 | char *t_field_name = TYPE_FIELD_NAME (type, i); | |
db577aea | 2488 | if (t_field_name && (strcmp_iw (t_field_name, name) == 0)) |
c906108c SS |
2489 | return 1; |
2490 | } | |
2491 | ||
ac3eeb49 MS |
2492 | /* C++: If it was not found as a data field, then try to return it |
2493 | as a pointer to a method. */ | |
c906108c | 2494 | |
c906108c SS |
2495 | for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; --i) |
2496 | { | |
db577aea | 2497 | if (strcmp_iw (TYPE_FN_FIELDLIST_NAME (type, i), name) == 0) |
c906108c SS |
2498 | return 1; |
2499 | } | |
2500 | ||
2501 | for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--) | |
2b2d9e11 | 2502 | if (check_field (TYPE_BASECLASS (type, i), name)) |
c906108c | 2503 | return 1; |
c5aa993b | 2504 | |
c906108c SS |
2505 | return 0; |
2506 | } | |
2507 | ||
79c2c32d | 2508 | /* C++: Given an aggregate type CURTYPE, and a member name NAME, |
0d5de010 DJ |
2509 | return the appropriate member (or the address of the member, if |
2510 | WANT_ADDRESS). This function is used to resolve user expressions | |
2511 | of the form "DOMAIN::NAME". For more details on what happens, see | |
2512 | the comment before value_struct_elt_for_reference. */ | |
79c2c32d DC |
2513 | |
2514 | struct value * | |
2515 | value_aggregate_elt (struct type *curtype, | |
0d5de010 | 2516 | char *name, int want_address, |
79c2c32d DC |
2517 | enum noside noside) |
2518 | { | |
2519 | switch (TYPE_CODE (curtype)) | |
2520 | { | |
2521 | case TYPE_CODE_STRUCT: | |
2522 | case TYPE_CODE_UNION: | |
ac3eeb49 MS |
2523 | return value_struct_elt_for_reference (curtype, 0, curtype, |
2524 | name, NULL, | |
0d5de010 | 2525 | want_address, noside); |
79c2c32d | 2526 | case TYPE_CODE_NAMESPACE: |
ac3eeb49 MS |
2527 | return value_namespace_elt (curtype, name, |
2528 | want_address, noside); | |
79c2c32d DC |
2529 | default: |
2530 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 2531 | _("non-aggregate type in value_aggregate_elt")); |
79c2c32d DC |
2532 | } |
2533 | } | |
2534 | ||
c906108c | 2535 | /* C++: Given an aggregate type CURTYPE, and a member name NAME, |
ac3eeb49 MS |
2536 | return the address of this member as a "pointer to member" type. |
2537 | If INTYPE is non-null, then it will be the type of the member we | |
2538 | are looking for. This will help us resolve "pointers to member | |
2539 | functions". This function is used to resolve user expressions of | |
2540 | the form "DOMAIN::NAME". */ | |
c906108c | 2541 | |
63d06c5c | 2542 | static struct value * |
fba45db2 KB |
2543 | value_struct_elt_for_reference (struct type *domain, int offset, |
2544 | struct type *curtype, char *name, | |
ac3eeb49 MS |
2545 | struct type *intype, |
2546 | int want_address, | |
63d06c5c | 2547 | enum noside noside) |
c906108c | 2548 | { |
52f0bd74 AC |
2549 | struct type *t = curtype; |
2550 | int i; | |
0d5de010 | 2551 | struct value *v, *result; |
c906108c | 2552 | |
c5aa993b | 2553 | if (TYPE_CODE (t) != TYPE_CODE_STRUCT |
c906108c | 2554 | && TYPE_CODE (t) != TYPE_CODE_UNION) |
8a3fe4f8 | 2555 | error (_("Internal error: non-aggregate type to value_struct_elt_for_reference")); |
c906108c SS |
2556 | |
2557 | for (i = TYPE_NFIELDS (t) - 1; i >= TYPE_N_BASECLASSES (t); i--) | |
2558 | { | |
2559 | char *t_field_name = TYPE_FIELD_NAME (t, i); | |
c5aa993b | 2560 | |
6314a349 | 2561 | if (t_field_name && strcmp (t_field_name, name) == 0) |
c906108c | 2562 | { |
d6a843b5 | 2563 | if (field_is_static (&TYPE_FIELD (t, i))) |
c906108c SS |
2564 | { |
2565 | v = value_static_field (t, i); | |
2566 | if (v == NULL) | |
8a3fe4f8 | 2567 | error (_("static field %s has been optimized out"), |
c906108c | 2568 | name); |
0d5de010 DJ |
2569 | if (want_address) |
2570 | v = value_addr (v); | |
c906108c SS |
2571 | return v; |
2572 | } | |
2573 | if (TYPE_FIELD_PACKED (t, i)) | |
8a3fe4f8 | 2574 | error (_("pointers to bitfield members not allowed")); |
c5aa993b | 2575 | |
0d5de010 DJ |
2576 | if (want_address) |
2577 | return value_from_longest | |
2578 | (lookup_memberptr_type (TYPE_FIELD_TYPE (t, i), domain), | |
2579 | offset + (LONGEST) (TYPE_FIELD_BITPOS (t, i) >> 3)); | |
2580 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
2581 | return allocate_value (TYPE_FIELD_TYPE (t, i)); | |
2582 | else | |
2583 | error (_("Cannot reference non-static field \"%s\""), name); | |
c906108c SS |
2584 | } |
2585 | } | |
2586 | ||
ac3eeb49 MS |
2587 | /* C++: If it was not found as a data field, then try to return it |
2588 | as a pointer to a method. */ | |
c906108c | 2589 | |
c906108c SS |
2590 | /* Perform all necessary dereferencing. */ |
2591 | while (intype && TYPE_CODE (intype) == TYPE_CODE_PTR) | |
2592 | intype = TYPE_TARGET_TYPE (intype); | |
2593 | ||
2594 | for (i = TYPE_NFN_FIELDS (t) - 1; i >= 0; --i) | |
2595 | { | |
2596 | char *t_field_name = TYPE_FN_FIELDLIST_NAME (t, i); | |
2597 | char dem_opname[64]; | |
2598 | ||
ac3eeb49 MS |
2599 | if (strncmp (t_field_name, "__", 2) == 0 |
2600 | || strncmp (t_field_name, "op", 2) == 0 | |
2601 | || strncmp (t_field_name, "type", 4) == 0) | |
c906108c | 2602 | { |
ac3eeb49 MS |
2603 | if (cplus_demangle_opname (t_field_name, |
2604 | dem_opname, DMGL_ANSI)) | |
c5aa993b | 2605 | t_field_name = dem_opname; |
ac3eeb49 MS |
2606 | else if (cplus_demangle_opname (t_field_name, |
2607 | dem_opname, 0)) | |
c906108c | 2608 | t_field_name = dem_opname; |
c906108c | 2609 | } |
6314a349 | 2610 | if (t_field_name && strcmp (t_field_name, name) == 0) |
c906108c SS |
2611 | { |
2612 | int j = TYPE_FN_FIELDLIST_LENGTH (t, i); | |
2613 | struct fn_field *f = TYPE_FN_FIELDLIST1 (t, i); | |
c5aa993b | 2614 | |
de17c821 DJ |
2615 | check_stub_method_group (t, i); |
2616 | ||
c906108c | 2617 | if (intype == 0 && j > 1) |
8a3fe4f8 | 2618 | error (_("non-unique member `%s' requires type instantiation"), name); |
c906108c SS |
2619 | if (intype) |
2620 | { | |
2621 | while (j--) | |
2622 | if (TYPE_FN_FIELD_TYPE (f, j) == intype) | |
2623 | break; | |
2624 | if (j < 0) | |
8a3fe4f8 | 2625 | error (_("no member function matches that type instantiation")); |
c906108c SS |
2626 | } |
2627 | else | |
2628 | j = 0; | |
c5aa993b | 2629 | |
0d5de010 DJ |
2630 | if (TYPE_FN_FIELD_STATIC_P (f, j)) |
2631 | { | |
ac3eeb49 MS |
2632 | struct symbol *s = |
2633 | lookup_symbol (TYPE_FN_FIELD_PHYSNAME (f, j), | |
2570f2b7 | 2634 | 0, VAR_DOMAIN, 0); |
0d5de010 DJ |
2635 | if (s == NULL) |
2636 | return NULL; | |
2637 | ||
2638 | if (want_address) | |
2639 | return value_addr (read_var_value (s, 0)); | |
2640 | else | |
2641 | return read_var_value (s, 0); | |
2642 | } | |
2643 | ||
c906108c SS |
2644 | if (TYPE_FN_FIELD_VIRTUAL_P (f, j)) |
2645 | { | |
0d5de010 DJ |
2646 | if (want_address) |
2647 | { | |
2648 | result = allocate_value | |
2649 | (lookup_methodptr_type (TYPE_FN_FIELD_TYPE (f, j))); | |
ad4820ab UW |
2650 | cplus_make_method_ptr (value_type (result), |
2651 | value_contents_writeable (result), | |
0d5de010 DJ |
2652 | TYPE_FN_FIELD_VOFFSET (f, j), 1); |
2653 | } | |
2654 | else if (noside == EVAL_AVOID_SIDE_EFFECTS) | |
2655 | return allocate_value (TYPE_FN_FIELD_TYPE (f, j)); | |
2656 | else | |
2657 | error (_("Cannot reference virtual member function \"%s\""), | |
2658 | name); | |
c906108c SS |
2659 | } |
2660 | else | |
2661 | { | |
ac3eeb49 MS |
2662 | struct symbol *s = |
2663 | lookup_symbol (TYPE_FN_FIELD_PHYSNAME (f, j), | |
2570f2b7 | 2664 | 0, VAR_DOMAIN, 0); |
c906108c | 2665 | if (s == NULL) |
0d5de010 DJ |
2666 | return NULL; |
2667 | ||
2668 | v = read_var_value (s, 0); | |
2669 | if (!want_address) | |
2670 | result = v; | |
c906108c SS |
2671 | else |
2672 | { | |
0d5de010 | 2673 | result = allocate_value (lookup_methodptr_type (TYPE_FN_FIELD_TYPE (f, j))); |
ad4820ab UW |
2674 | cplus_make_method_ptr (value_type (result), |
2675 | value_contents_writeable (result), | |
42ae5230 | 2676 | value_address (v), 0); |
c906108c | 2677 | } |
c906108c | 2678 | } |
0d5de010 | 2679 | return result; |
c906108c SS |
2680 | } |
2681 | } | |
2682 | for (i = TYPE_N_BASECLASSES (t) - 1; i >= 0; i--) | |
2683 | { | |
f23631e4 | 2684 | struct value *v; |
c906108c SS |
2685 | int base_offset; |
2686 | ||
2687 | if (BASETYPE_VIA_VIRTUAL (t, i)) | |
2688 | base_offset = 0; | |
2689 | else | |
2690 | base_offset = TYPE_BASECLASS_BITPOS (t, i) / 8; | |
2691 | v = value_struct_elt_for_reference (domain, | |
2692 | offset + base_offset, | |
2693 | TYPE_BASECLASS (t, i), | |
ac3eeb49 MS |
2694 | name, intype, |
2695 | want_address, noside); | |
c906108c SS |
2696 | if (v) |
2697 | return v; | |
2698 | } | |
63d06c5c DC |
2699 | |
2700 | /* As a last chance, pretend that CURTYPE is a namespace, and look | |
2701 | it up that way; this (frequently) works for types nested inside | |
2702 | classes. */ | |
2703 | ||
ac3eeb49 MS |
2704 | return value_maybe_namespace_elt (curtype, name, |
2705 | want_address, noside); | |
c906108c SS |
2706 | } |
2707 | ||
79c2c32d DC |
2708 | /* C++: Return the member NAME of the namespace given by the type |
2709 | CURTYPE. */ | |
2710 | ||
2711 | static struct value * | |
2712 | value_namespace_elt (const struct type *curtype, | |
0d5de010 | 2713 | char *name, int want_address, |
79c2c32d | 2714 | enum noside noside) |
63d06c5c DC |
2715 | { |
2716 | struct value *retval = value_maybe_namespace_elt (curtype, name, | |
ac3eeb49 MS |
2717 | want_address, |
2718 | noside); | |
63d06c5c DC |
2719 | |
2720 | if (retval == NULL) | |
ac3eeb49 MS |
2721 | error (_("No symbol \"%s\" in namespace \"%s\"."), |
2722 | name, TYPE_TAG_NAME (curtype)); | |
63d06c5c DC |
2723 | |
2724 | return retval; | |
2725 | } | |
2726 | ||
2727 | /* A helper function used by value_namespace_elt and | |
2728 | value_struct_elt_for_reference. It looks up NAME inside the | |
2729 | context CURTYPE; this works if CURTYPE is a namespace or if CURTYPE | |
2730 | is a class and NAME refers to a type in CURTYPE itself (as opposed | |
2731 | to, say, some base class of CURTYPE). */ | |
2732 | ||
2733 | static struct value * | |
2734 | value_maybe_namespace_elt (const struct type *curtype, | |
0d5de010 | 2735 | char *name, int want_address, |
63d06c5c | 2736 | enum noside noside) |
79c2c32d DC |
2737 | { |
2738 | const char *namespace_name = TYPE_TAG_NAME (curtype); | |
2739 | struct symbol *sym; | |
0d5de010 | 2740 | struct value *result; |
79c2c32d DC |
2741 | |
2742 | sym = cp_lookup_symbol_namespace (namespace_name, name, NULL, | |
ac3eeb49 | 2743 | get_selected_block (0), |
21b556f4 | 2744 | VAR_DOMAIN); |
79c2c32d DC |
2745 | |
2746 | if (sym == NULL) | |
63d06c5c | 2747 | return NULL; |
79c2c32d DC |
2748 | else if ((noside == EVAL_AVOID_SIDE_EFFECTS) |
2749 | && (SYMBOL_CLASS (sym) == LOC_TYPEDEF)) | |
0d5de010 | 2750 | result = allocate_value (SYMBOL_TYPE (sym)); |
79c2c32d | 2751 | else |
0d5de010 DJ |
2752 | result = value_of_variable (sym, get_selected_block (0)); |
2753 | ||
2754 | if (result && want_address) | |
2755 | result = value_addr (result); | |
2756 | ||
2757 | return result; | |
79c2c32d DC |
2758 | } |
2759 | ||
ac3eeb49 MS |
2760 | /* Given a pointer value V, find the real (RTTI) type of the object it |
2761 | points to. | |
2762 | ||
c906108c | 2763 | Other parameters FULL, TOP, USING_ENC as with value_rtti_type() |
ac3eeb49 | 2764 | and refer to the values computed for the object pointed to. */ |
c906108c SS |
2765 | |
2766 | struct type * | |
ac3eeb49 MS |
2767 | value_rtti_target_type (struct value *v, int *full, |
2768 | int *top, int *using_enc) | |
c906108c | 2769 | { |
f23631e4 | 2770 | struct value *target; |
c906108c SS |
2771 | |
2772 | target = value_ind (v); | |
2773 | ||
2774 | return value_rtti_type (target, full, top, using_enc); | |
2775 | } | |
2776 | ||
2777 | /* Given a value pointed to by ARGP, check its real run-time type, and | |
2778 | if that is different from the enclosing type, create a new value | |
2779 | using the real run-time type as the enclosing type (and of the same | |
2780 | type as ARGP) and return it, with the embedded offset adjusted to | |
ac3eeb49 MS |
2781 | be the correct offset to the enclosed object. RTYPE is the type, |
2782 | and XFULL, XTOP, and XUSING_ENC are the other parameters, computed | |
2783 | by value_rtti_type(). If these are available, they can be supplied | |
2784 | and a second call to value_rtti_type() is avoided. (Pass RTYPE == | |
2785 | NULL if they're not available. */ | |
c906108c | 2786 | |
f23631e4 | 2787 | struct value * |
ac3eeb49 MS |
2788 | value_full_object (struct value *argp, |
2789 | struct type *rtype, | |
2790 | int xfull, int xtop, | |
fba45db2 | 2791 | int xusing_enc) |
c906108c | 2792 | { |
c5aa993b | 2793 | struct type *real_type; |
c906108c SS |
2794 | int full = 0; |
2795 | int top = -1; | |
2796 | int using_enc = 0; | |
f23631e4 | 2797 | struct value *new_val; |
c906108c SS |
2798 | |
2799 | if (rtype) | |
2800 | { | |
2801 | real_type = rtype; | |
2802 | full = xfull; | |
2803 | top = xtop; | |
2804 | using_enc = xusing_enc; | |
2805 | } | |
2806 | else | |
2807 | real_type = value_rtti_type (argp, &full, &top, &using_enc); | |
2808 | ||
ac3eeb49 | 2809 | /* If no RTTI data, or if object is already complete, do nothing. */ |
4754a64e | 2810 | if (!real_type || real_type == value_enclosing_type (argp)) |
c906108c SS |
2811 | return argp; |
2812 | ||
2813 | /* If we have the full object, but for some reason the enclosing | |
ac3eeb49 MS |
2814 | type is wrong, set it. */ |
2815 | /* pai: FIXME -- sounds iffy */ | |
c906108c SS |
2816 | if (full) |
2817 | { | |
2b127877 | 2818 | argp = value_change_enclosing_type (argp, real_type); |
c906108c SS |
2819 | return argp; |
2820 | } | |
2821 | ||
2822 | /* Check if object is in memory */ | |
2823 | if (VALUE_LVAL (argp) != lval_memory) | |
2824 | { | |
ac3eeb49 MS |
2825 | warning (_("Couldn't retrieve complete object of RTTI type %s; object may be in register(s)."), |
2826 | TYPE_NAME (real_type)); | |
c5aa993b | 2827 | |
c906108c SS |
2828 | return argp; |
2829 | } | |
c5aa993b | 2830 | |
ac3eeb49 MS |
2831 | /* All other cases -- retrieve the complete object. */ |
2832 | /* Go back by the computed top_offset from the beginning of the | |
2833 | object, adjusting for the embedded offset of argp if that's what | |
2834 | value_rtti_type used for its computation. */ | |
42ae5230 | 2835 | new_val = value_at_lazy (real_type, value_address (argp) - top + |
13c3b5f5 | 2836 | (using_enc ? 0 : value_embedded_offset (argp))); |
04624583 | 2837 | deprecated_set_value_type (new_val, value_type (argp)); |
13c3b5f5 AC |
2838 | set_value_embedded_offset (new_val, (using_enc |
2839 | ? top + value_embedded_offset (argp) | |
2840 | : top)); | |
c906108c SS |
2841 | return new_val; |
2842 | } | |
2843 | ||
389e51db | 2844 | |
d069f99d | 2845 | /* Return the value of the local variable, if one exists. |
c906108c SS |
2846 | Flag COMPLAIN signals an error if the request is made in an |
2847 | inappropriate context. */ | |
2848 | ||
f23631e4 | 2849 | struct value * |
d069f99d | 2850 | value_of_local (const char *name, int complain) |
c906108c SS |
2851 | { |
2852 | struct symbol *func, *sym; | |
2853 | struct block *b; | |
d069f99d | 2854 | struct value * ret; |
206415a3 | 2855 | struct frame_info *frame; |
c906108c | 2856 | |
206415a3 DJ |
2857 | if (complain) |
2858 | frame = get_selected_frame (_("no frame selected")); | |
2859 | else | |
c906108c | 2860 | { |
206415a3 DJ |
2861 | frame = deprecated_safe_get_selected_frame (); |
2862 | if (frame == 0) | |
c5aa993b | 2863 | return 0; |
c906108c SS |
2864 | } |
2865 | ||
206415a3 | 2866 | func = get_frame_function (frame); |
c906108c SS |
2867 | if (!func) |
2868 | { | |
2869 | if (complain) | |
8a3fe4f8 | 2870 | error (_("no `%s' in nameless context"), name); |
c5aa993b JM |
2871 | else |
2872 | return 0; | |
c906108c SS |
2873 | } |
2874 | ||
2875 | b = SYMBOL_BLOCK_VALUE (func); | |
de4f826b | 2876 | if (dict_empty (BLOCK_DICT (b))) |
c906108c SS |
2877 | { |
2878 | if (complain) | |
8a3fe4f8 | 2879 | error (_("no args, no `%s'"), name); |
c5aa993b JM |
2880 | else |
2881 | return 0; | |
c906108c SS |
2882 | } |
2883 | ||
2884 | /* Calling lookup_block_symbol is necessary to get the LOC_REGISTER | |
2885 | symbol instead of the LOC_ARG one (if both exist). */ | |
176620f1 | 2886 | sym = lookup_block_symbol (b, name, NULL, VAR_DOMAIN); |
c906108c SS |
2887 | if (sym == NULL) |
2888 | { | |
2889 | if (complain) | |
ac3eeb49 MS |
2890 | error (_("current stack frame does not contain a variable named `%s'"), |
2891 | name); | |
c906108c SS |
2892 | else |
2893 | return NULL; | |
2894 | } | |
2895 | ||
206415a3 | 2896 | ret = read_var_value (sym, frame); |
d069f99d | 2897 | if (ret == 0 && complain) |
8a3fe4f8 | 2898 | error (_("`%s' argument unreadable"), name); |
d069f99d AF |
2899 | return ret; |
2900 | } | |
2901 | ||
2902 | /* C++/Objective-C: return the value of the class instance variable, | |
2903 | if one exists. Flag COMPLAIN signals an error if the request is | |
2904 | made in an inappropriate context. */ | |
2905 | ||
2906 | struct value * | |
2907 | value_of_this (int complain) | |
2908 | { | |
2b2d9e11 VP |
2909 | if (!current_language->la_name_of_this) |
2910 | return 0; | |
2911 | return value_of_local (current_language->la_name_of_this, complain); | |
c906108c SS |
2912 | } |
2913 | ||
ac3eeb49 MS |
2914 | /* Create a slice (sub-string, sub-array) of ARRAY, that is LENGTH |
2915 | elements long, starting at LOWBOUND. The result has the same lower | |
2916 | bound as the original ARRAY. */ | |
c906108c | 2917 | |
f23631e4 AC |
2918 | struct value * |
2919 | value_slice (struct value *array, int lowbound, int length) | |
c906108c SS |
2920 | { |
2921 | struct type *slice_range_type, *slice_type, *range_type; | |
7a67d0fe | 2922 | LONGEST lowerbound, upperbound; |
f23631e4 | 2923 | struct value *slice; |
c906108c | 2924 | struct type *array_type; |
ac3eeb49 | 2925 | |
df407dfe | 2926 | array_type = check_typedef (value_type (array)); |
c906108c SS |
2927 | if (TYPE_CODE (array_type) != TYPE_CODE_ARRAY |
2928 | && TYPE_CODE (array_type) != TYPE_CODE_STRING | |
2929 | && TYPE_CODE (array_type) != TYPE_CODE_BITSTRING) | |
8a3fe4f8 | 2930 | error (_("cannot take slice of non-array")); |
ac3eeb49 | 2931 | |
c906108c SS |
2932 | range_type = TYPE_INDEX_TYPE (array_type); |
2933 | if (get_discrete_bounds (range_type, &lowerbound, &upperbound) < 0) | |
8a3fe4f8 | 2934 | error (_("slice from bad array or bitstring")); |
ac3eeb49 | 2935 | |
c906108c | 2936 | if (lowbound < lowerbound || length < 0 |
db034ac5 | 2937 | || lowbound + length - 1 > upperbound) |
8a3fe4f8 | 2938 | error (_("slice out of range")); |
ac3eeb49 | 2939 | |
c906108c SS |
2940 | /* FIXME-type-allocation: need a way to free this type when we are |
2941 | done with it. */ | |
c5aa993b | 2942 | slice_range_type = create_range_type ((struct type *) NULL, |
c906108c | 2943 | TYPE_TARGET_TYPE (range_type), |
ac3eeb49 MS |
2944 | lowbound, |
2945 | lowbound + length - 1); | |
c906108c SS |
2946 | if (TYPE_CODE (array_type) == TYPE_CODE_BITSTRING) |
2947 | { | |
2948 | int i; | |
ac3eeb49 MS |
2949 | |
2950 | slice_type = create_set_type ((struct type *) NULL, | |
2951 | slice_range_type); | |
c906108c SS |
2952 | TYPE_CODE (slice_type) = TYPE_CODE_BITSTRING; |
2953 | slice = value_zero (slice_type, not_lval); | |
ac3eeb49 | 2954 | |
c906108c SS |
2955 | for (i = 0; i < length; i++) |
2956 | { | |
2957 | int element = value_bit_index (array_type, | |
0fd88904 | 2958 | value_contents (array), |
c906108c SS |
2959 | lowbound + i); |
2960 | if (element < 0) | |
8a3fe4f8 | 2961 | error (_("internal error accessing bitstring")); |
c906108c SS |
2962 | else if (element > 0) |
2963 | { | |
2964 | int j = i % TARGET_CHAR_BIT; | |
32c9a795 | 2965 | if (gdbarch_bits_big_endian (current_gdbarch)) |
c906108c | 2966 | j = TARGET_CHAR_BIT - 1 - j; |
990a07ab | 2967 | value_contents_raw (slice)[i / TARGET_CHAR_BIT] |= (1 << j); |
c906108c SS |
2968 | } |
2969 | } | |
ac3eeb49 MS |
2970 | /* We should set the address, bitssize, and bitspos, so the |
2971 | slice can be used on the LHS, but that may require extensions | |
2972 | to value_assign. For now, just leave as a non_lval. | |
2973 | FIXME. */ | |
c906108c SS |
2974 | } |
2975 | else | |
2976 | { | |
2977 | struct type *element_type = TYPE_TARGET_TYPE (array_type); | |
ac3eeb49 MS |
2978 | LONGEST offset = |
2979 | (lowbound - lowerbound) * TYPE_LENGTH (check_typedef (element_type)); | |
2980 | ||
2981 | slice_type = create_array_type ((struct type *) NULL, | |
2982 | element_type, | |
c906108c SS |
2983 | slice_range_type); |
2984 | TYPE_CODE (slice_type) = TYPE_CODE (array_type); | |
ac3eeb49 | 2985 | |
9214ee5f | 2986 | if (VALUE_LVAL (array) == lval_memory && value_lazy (array)) |
3e3d7139 | 2987 | slice = allocate_value_lazy (slice_type); |
c906108c | 2988 | else |
3e3d7139 JG |
2989 | { |
2990 | slice = allocate_value (slice_type); | |
2991 | memcpy (value_contents_writeable (slice), | |
2992 | value_contents (array) + offset, | |
2993 | TYPE_LENGTH (slice_type)); | |
2994 | } | |
ac3eeb49 | 2995 | |
74bcbdf3 | 2996 | set_value_component_location (slice, array); |
65d3800a | 2997 | VALUE_FRAME_ID (slice) = VALUE_FRAME_ID (array); |
f5cf64a7 | 2998 | set_value_offset (slice, value_offset (array) + offset); |
c906108c SS |
2999 | } |
3000 | return slice; | |
3001 | } | |
3002 | ||
ac3eeb49 MS |
3003 | /* Create a value for a FORTRAN complex number. Currently most of the |
3004 | time values are coerced to COMPLEX*16 (i.e. a complex number | |
070ad9f0 DB |
3005 | composed of 2 doubles. This really should be a smarter routine |
3006 | that figures out precision inteligently as opposed to assuming | |
ac3eeb49 | 3007 | doubles. FIXME: fmb */ |
c906108c | 3008 | |
f23631e4 | 3009 | struct value * |
ac3eeb49 MS |
3010 | value_literal_complex (struct value *arg1, |
3011 | struct value *arg2, | |
3012 | struct type *type) | |
c906108c | 3013 | { |
f23631e4 | 3014 | struct value *val; |
c906108c SS |
3015 | struct type *real_type = TYPE_TARGET_TYPE (type); |
3016 | ||
3017 | val = allocate_value (type); | |
3018 | arg1 = value_cast (real_type, arg1); | |
3019 | arg2 = value_cast (real_type, arg2); | |
3020 | ||
990a07ab | 3021 | memcpy (value_contents_raw (val), |
0fd88904 | 3022 | value_contents (arg1), TYPE_LENGTH (real_type)); |
990a07ab | 3023 | memcpy (value_contents_raw (val) + TYPE_LENGTH (real_type), |
0fd88904 | 3024 | value_contents (arg2), TYPE_LENGTH (real_type)); |
c906108c SS |
3025 | return val; |
3026 | } | |
3027 | ||
ac3eeb49 | 3028 | /* Cast a value into the appropriate complex data type. */ |
c906108c | 3029 | |
f23631e4 AC |
3030 | static struct value * |
3031 | cast_into_complex (struct type *type, struct value *val) | |
c906108c SS |
3032 | { |
3033 | struct type *real_type = TYPE_TARGET_TYPE (type); | |
ac3eeb49 | 3034 | |
df407dfe | 3035 | if (TYPE_CODE (value_type (val)) == TYPE_CODE_COMPLEX) |
c906108c | 3036 | { |
df407dfe | 3037 | struct type *val_real_type = TYPE_TARGET_TYPE (value_type (val)); |
f23631e4 AC |
3038 | struct value *re_val = allocate_value (val_real_type); |
3039 | struct value *im_val = allocate_value (val_real_type); | |
c906108c | 3040 | |
990a07ab | 3041 | memcpy (value_contents_raw (re_val), |
0fd88904 | 3042 | value_contents (val), TYPE_LENGTH (val_real_type)); |
990a07ab | 3043 | memcpy (value_contents_raw (im_val), |
0fd88904 | 3044 | value_contents (val) + TYPE_LENGTH (val_real_type), |
c5aa993b | 3045 | TYPE_LENGTH (val_real_type)); |
c906108c SS |
3046 | |
3047 | return value_literal_complex (re_val, im_val, type); | |
3048 | } | |
df407dfe AC |
3049 | else if (TYPE_CODE (value_type (val)) == TYPE_CODE_FLT |
3050 | || TYPE_CODE (value_type (val)) == TYPE_CODE_INT) | |
ac3eeb49 MS |
3051 | return value_literal_complex (val, |
3052 | value_zero (real_type, not_lval), | |
3053 | type); | |
c906108c | 3054 | else |
8a3fe4f8 | 3055 | error (_("cannot cast non-number to complex")); |
c906108c SS |
3056 | } |
3057 | ||
3058 | void | |
fba45db2 | 3059 | _initialize_valops (void) |
c906108c | 3060 | { |
5bf193a2 AC |
3061 | add_setshow_boolean_cmd ("overload-resolution", class_support, |
3062 | &overload_resolution, _("\ | |
3063 | Set overload resolution in evaluating C++ functions."), _("\ | |
ac3eeb49 MS |
3064 | Show overload resolution in evaluating C++ functions."), |
3065 | NULL, NULL, | |
920d2a44 | 3066 | show_overload_resolution, |
5bf193a2 | 3067 | &setlist, &showlist); |
c906108c | 3068 | overload_resolution = 1; |
c906108c | 3069 | } |