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* valops.c (value_find_oload_method_list): Now static.
[thirdparty/binutils-gdb.git] / gdb / value.h
1 /* Definitions for values of C expressions, for GDB.
2
3 Copyright (C) 1986-2012 Free Software Foundation, Inc.
4
5 This file is part of GDB.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19
20 #if !defined (VALUE_H)
21 #define VALUE_H 1
22
23 #include "doublest.h"
24 #include "frame.h" /* For struct frame_id. */
25
26 struct block;
27 struct expression;
28 struct regcache;
29 struct symbol;
30 struct type;
31 struct ui_file;
32 struct language_defn;
33 struct value_print_options;
34
35 /* The structure which defines the type of a value. It should never
36 be possible for a program lval value to survive over a call to the
37 inferior (i.e. to be put into the history list or an internal
38 variable). */
39
40 struct value;
41
42 /* Values are stored in a chain, so that they can be deleted easily
43 over calls to the inferior. Values assigned to internal variables,
44 put into the value history or exposed to Python are taken off this
45 list. */
46
47 struct value *value_next (struct value *);
48
49 /* Type of the value. */
50
51 extern struct type *value_type (const struct value *);
52
53 /* This is being used to change the type of an existing value, that
54 code should instead be creating a new value with the changed type
55 (but possibly shared content). */
56
57 extern void deprecated_set_value_type (struct value *value,
58 struct type *type);
59
60 /* Only used for bitfields; number of bits contained in them. */
61
62 extern int value_bitsize (const struct value *);
63 extern void set_value_bitsize (struct value *, int bit);
64
65 /* Only used for bitfields; position of start of field. For
66 gdbarch_bits_big_endian=0 targets, it is the position of the LSB. For
67 gdbarch_bits_big_endian=1 targets, it is the position of the MSB. */
68
69 extern int value_bitpos (const struct value *);
70 extern void set_value_bitpos (struct value *, int bit);
71
72 /* Only used for bitfields; the containing value. This allows a
73 single read from the target when displaying multiple
74 bitfields. */
75
76 struct value *value_parent (struct value *);
77 extern void set_value_parent (struct value *value, struct value *parent);
78
79 /* Describes offset of a value within lval of a structure in bytes.
80 If lval == lval_memory, this is an offset to the address. If lval
81 == lval_register, this is a further offset from location.address
82 within the registers structure. Note also the member
83 embedded_offset below. */
84
85 extern int value_offset (const struct value *);
86 extern void set_value_offset (struct value *, int offset);
87
88 /* The comment from "struct value" reads: ``Is it modifiable? Only
89 relevant if lval != not_lval.''. Shouldn't the value instead be
90 not_lval and be done with it? */
91
92 extern int deprecated_value_modifiable (struct value *value);
93 extern void deprecated_set_value_modifiable (struct value *value,
94 int modifiable);
95
96 /* If a value represents a C++ object, then the `type' field gives the
97 object's compile-time type. If the object actually belongs to some
98 class derived from `type', perhaps with other base classes and
99 additional members, then `type' is just a subobject of the real
100 thing, and the full object is probably larger than `type' would
101 suggest.
102
103 If `type' is a dynamic class (i.e. one with a vtable), then GDB can
104 actually determine the object's run-time type by looking at the
105 run-time type information in the vtable. When this information is
106 available, we may elect to read in the entire object, for several
107 reasons:
108
109 - When printing the value, the user would probably rather see the
110 full object, not just the limited portion apparent from the
111 compile-time type.
112
113 - If `type' has virtual base classes, then even printing `type'
114 alone may require reaching outside the `type' portion of the
115 object to wherever the virtual base class has been stored.
116
117 When we store the entire object, `enclosing_type' is the run-time
118 type -- the complete object -- and `embedded_offset' is the offset
119 of `type' within that larger type, in bytes. The value_contents()
120 macro takes `embedded_offset' into account, so most GDB code
121 continues to see the `type' portion of the value, just as the
122 inferior would.
123
124 If `type' is a pointer to an object, then `enclosing_type' is a
125 pointer to the object's run-time type, and `pointed_to_offset' is
126 the offset in bytes from the full object to the pointed-to object
127 -- that is, the value `embedded_offset' would have if we followed
128 the pointer and fetched the complete object. (I don't really see
129 the point. Why not just determine the run-time type when you
130 indirect, and avoid the special case? The contents don't matter
131 until you indirect anyway.)
132
133 If we're not doing anything fancy, `enclosing_type' is equal to
134 `type', and `embedded_offset' is zero, so everything works
135 normally. */
136
137 extern struct type *value_enclosing_type (struct value *);
138 extern void set_value_enclosing_type (struct value *val,
139 struct type *new_type);
140
141 /* Returns value_type or value_enclosing_type depending on
142 value_print_options.objectprint.
143
144 If RESOLVE_SIMPLE_TYPES is 0 the enclosing type will be resolved
145 only for pointers and references, else it will be returned
146 for all the types (e.g. structures). This option is useful
147 to prevent retrieving enclosing type for the base classes fields.
148
149 REAL_TYPE_FOUND is used to inform whether the real type was found
150 (or just static type was used). The NULL may be passed if it is not
151 necessary. */
152
153 extern struct type *value_actual_type (struct value *value,
154 int resolve_simple_types,
155 int *real_type_found);
156
157 extern int value_pointed_to_offset (struct value *value);
158 extern void set_value_pointed_to_offset (struct value *value, int val);
159 extern int value_embedded_offset (struct value *value);
160 extern void set_value_embedded_offset (struct value *value, int val);
161
162 /* For lval_computed values, this structure holds functions used to
163 retrieve and set the value (or portions of the value).
164
165 For each function, 'V' is the 'this' pointer: an lval_funcs
166 function F may always assume that the V it receives is an
167 lval_computed value, and has F in the appropriate slot of its
168 lval_funcs structure. */
169
170 struct lval_funcs
171 {
172 /* Fill in VALUE's contents. This is used to "un-lazy" values. If
173 a problem arises in obtaining VALUE's bits, this function should
174 call 'error'. If it is NULL value_fetch_lazy on "un-lazy"
175 non-optimized-out value is an internal error. */
176 void (*read) (struct value *v);
177
178 /* Handle an assignment TOVAL = FROMVAL by writing the value of
179 FROMVAL to TOVAL's location. The contents of TOVAL have not yet
180 been updated. If a problem arises in doing so, this function
181 should call 'error'. If it is NULL such TOVAL assignment is an error as
182 TOVAL is not considered as an lvalue. */
183 void (*write) (struct value *toval, struct value *fromval);
184
185 /* Check the validity of some bits in VALUE. This should return 1
186 if all the bits starting at OFFSET and extending for LENGTH bits
187 are valid, or 0 if any bit is invalid. */
188 int (*check_validity) (const struct value *value, int offset, int length);
189
190 /* Return 1 if any bit in VALUE is valid, 0 if they are all invalid. */
191 int (*check_any_valid) (const struct value *value);
192
193 /* If non-NULL, this is used to implement pointer indirection for
194 this value. This method may return NULL, in which case value_ind
195 will fall back to ordinary indirection. */
196 struct value *(*indirect) (struct value *value);
197
198 /* If non-NULL, this is used to implement reference resolving for
199 this value. This method may return NULL, in which case coerce_ref
200 will fall back to ordinary references resolving. */
201 struct value *(*coerce_ref) (const struct value *value);
202
203 /* If non-NULL, this is used to determine whether the indicated bits
204 of VALUE are a synthetic pointer. */
205 int (*check_synthetic_pointer) (const struct value *value,
206 int offset, int length);
207
208 /* Return a duplicate of VALUE's closure, for use in a new value.
209 This may simply return the same closure, if VALUE's is
210 reference-counted or statically allocated.
211
212 This may be NULL, in which case VALUE's closure is re-used in the
213 new value. */
214 void *(*copy_closure) (const struct value *v);
215
216 /* Drop VALUE's reference to its closure. Maybe this frees the
217 closure; maybe this decrements a reference count; maybe the
218 closure is statically allocated and this does nothing.
219
220 This may be NULL, in which case no action is taken to free
221 VALUE's closure. */
222 void (*free_closure) (struct value *v);
223 };
224
225 /* Create a computed lvalue, with type TYPE, function pointers FUNCS,
226 and closure CLOSURE. */
227
228 extern struct value *allocate_computed_value (struct type *type,
229 const struct lval_funcs *funcs,
230 void *closure);
231
232 /* Helper function to check the validity of some bits of a value.
233
234 If TYPE represents some aggregate type (e.g., a structure), return 1.
235
236 Otherwise, any of the bytes starting at OFFSET and extending for
237 TYPE_LENGTH(TYPE) bytes are invalid, print a message to STREAM and
238 return 0. The checking is done using FUNCS.
239
240 Otherwise, return 1. */
241
242 extern int valprint_check_validity (struct ui_file *stream, struct type *type,
243 int embedded_offset,
244 const struct value *val);
245
246 extern struct value *allocate_optimized_out_value (struct type *type);
247
248 /* If VALUE is lval_computed, return its lval_funcs structure. */
249
250 extern const struct lval_funcs *value_computed_funcs (const struct value *);
251
252 /* If VALUE is lval_computed, return its closure. The meaning of the
253 returned value depends on the functions VALUE uses. */
254
255 extern void *value_computed_closure (const struct value *value);
256
257 /* If zero, contents of this value are in the contents field. If
258 nonzero, contents are in inferior. If the lval field is lval_memory,
259 the contents are in inferior memory at location.address plus offset.
260 The lval field may also be lval_register.
261
262 WARNING: This field is used by the code which handles watchpoints
263 (see breakpoint.c) to decide whether a particular value can be
264 watched by hardware watchpoints. If the lazy flag is set for some
265 member of a value chain, it is assumed that this member of the
266 chain doesn't need to be watched as part of watching the value
267 itself. This is how GDB avoids watching the entire struct or array
268 when the user wants to watch a single struct member or array
269 element. If you ever change the way lazy flag is set and reset, be
270 sure to consider this use as well! */
271
272 extern int value_lazy (struct value *);
273 extern void set_value_lazy (struct value *value, int val);
274
275 extern int value_stack (struct value *);
276 extern void set_value_stack (struct value *value, int val);
277
278 /* value_contents() and value_contents_raw() both return the address
279 of the gdb buffer used to hold a copy of the contents of the lval.
280 value_contents() is used when the contents of the buffer are needed
281 -- it uses value_fetch_lazy() to load the buffer from the process
282 being debugged if it hasn't already been loaded
283 (value_contents_writeable() is used when a writeable but fetched
284 buffer is required).. value_contents_raw() is used when data is
285 being stored into the buffer, or when it is certain that the
286 contents of the buffer are valid.
287
288 Note: The contents pointer is adjusted by the offset required to
289 get to the real subobject, if the value happens to represent
290 something embedded in a larger run-time object. */
291
292 extern gdb_byte *value_contents_raw (struct value *);
293
294 /* Actual contents of the value. For use of this value; setting it
295 uses the stuff above. Not valid if lazy is nonzero. Target
296 byte-order. We force it to be aligned properly for any possible
297 value. Note that a value therefore extends beyond what is
298 declared here. */
299
300 extern const gdb_byte *value_contents (struct value *);
301 extern gdb_byte *value_contents_writeable (struct value *);
302
303 /* The ALL variants of the above two macros do not adjust the returned
304 pointer by the embedded_offset value. */
305
306 extern gdb_byte *value_contents_all_raw (struct value *);
307 extern const gdb_byte *value_contents_all (struct value *);
308
309 /* Like value_contents_all, but does not require that the returned
310 bits be valid. This should only be used in situations where you
311 plan to check the validity manually. */
312 extern const gdb_byte *value_contents_for_printing (struct value *value);
313
314 /* Like value_contents_for_printing, but accepts a constant value
315 pointer. Unlike value_contents_for_printing however, the pointed
316 value must _not_ be lazy. */
317 extern const gdb_byte *
318 value_contents_for_printing_const (const struct value *value);
319
320 extern int value_fetch_lazy (struct value *val);
321 extern int value_contents_equal (struct value *val1, struct value *val2);
322
323 /* If nonzero, this is the value of a variable which does not actually
324 exist in the program. */
325 extern int value_optimized_out (struct value *value);
326 extern void set_value_optimized_out (struct value *value, int val);
327
328 /* Like value_optimized_out, but return false if any bit in the object
329 is valid. */
330 extern int value_entirely_optimized_out (const struct value *value);
331
332 /* Set or return field indicating whether a variable is initialized or
333 not, based on debugging information supplied by the compiler.
334 1 = initialized; 0 = uninitialized. */
335 extern int value_initialized (struct value *);
336 extern void set_value_initialized (struct value *, int);
337
338 /* Set COMPONENT's location as appropriate for a component of WHOLE
339 --- regardless of what kind of lvalue WHOLE is. */
340 extern void set_value_component_location (struct value *component,
341 const struct value *whole);
342
343 /* While the following fields are per- VALUE .CONTENT .PIECE (i.e., a
344 single value might have multiple LVALs), this hacked interface is
345 limited to just the first PIECE. Expect further change. */
346 /* Type of value; either not an lval, or one of the various different
347 possible kinds of lval. */
348 extern enum lval_type *deprecated_value_lval_hack (struct value *);
349 #define VALUE_LVAL(val) (*deprecated_value_lval_hack (val))
350
351 /* Like VALUE_LVAL, except the parameter can be const. */
352 extern enum lval_type value_lval_const (const struct value *value);
353
354 /* If lval == lval_memory, return the address in the inferior. If
355 lval == lval_register, return the byte offset into the registers
356 structure. Otherwise, return 0. The returned address
357 includes the offset, if any. */
358 extern CORE_ADDR value_address (const struct value *);
359
360 /* Like value_address, except the result does not include value's
361 offset. */
362 extern CORE_ADDR value_raw_address (struct value *);
363
364 /* Set the address of a value. */
365 extern void set_value_address (struct value *, CORE_ADDR);
366
367 /* Pointer to internal variable. */
368 extern struct internalvar **deprecated_value_internalvar_hack (struct value *);
369 #define VALUE_INTERNALVAR(val) (*deprecated_value_internalvar_hack (val))
370
371 /* Frame register value is relative to. This will be described in the
372 lval enum above as "lval_register". */
373 extern struct frame_id *deprecated_value_frame_id_hack (struct value *);
374 #define VALUE_FRAME_ID(val) (*deprecated_value_frame_id_hack (val))
375
376 /* Register number if the value is from a register. */
377 extern short *deprecated_value_regnum_hack (struct value *);
378 #define VALUE_REGNUM(val) (*deprecated_value_regnum_hack (val))
379
380 /* Return value after lval_funcs->coerce_ref (after check_typedef). Return
381 NULL if lval_funcs->coerce_ref is not applicable for whatever reason. */
382
383 extern struct value *coerce_ref_if_computed (const struct value *arg);
384
385 /* Setup a new value type and enclosing value type for dereferenced value VALUE.
386 ENC_TYPE is the new enclosing type that should be set. ORIGINAL_TYPE and
387 ORIGINAL_VAL are the type and value of the original reference or pointer.
388
389 Note, that VALUE is modified by this function.
390
391 It is a common implementation for coerce_ref and value_ind. */
392
393 extern struct value * readjust_indirect_value_type (struct value *value,
394 struct type *enc_type,
395 struct type *original_type,
396 struct value *original_val);
397
398 /* Convert a REF to the object referenced. */
399
400 extern struct value *coerce_ref (struct value *value);
401
402 /* If ARG is an array, convert it to a pointer.
403 If ARG is a function, convert it to a function pointer.
404
405 References are dereferenced. */
406
407 extern struct value *coerce_array (struct value *value);
408
409 /* Given a value, determine whether the bits starting at OFFSET and
410 extending for LENGTH bits are valid. This returns nonzero if all
411 bits in the given range are valid, zero if any bit is invalid. */
412
413 extern int value_bits_valid (const struct value *value,
414 int offset, int length);
415
416 /* Given a value, determine whether the bits starting at OFFSET and
417 extending for LENGTH bits are a synthetic pointer. */
418
419 extern int value_bits_synthetic_pointer (const struct value *value,
420 int offset, int length);
421
422 /* Given a value, determine whether the contents bytes starting at
423 OFFSET and extending for LENGTH bytes are available. This returns
424 nonzero if all bytes in the given range are available, zero if any
425 byte is unavailable. */
426
427 extern int value_bytes_available (const struct value *value,
428 int offset, int length);
429
430 /* Like value_bytes_available, but return false if any byte in the
431 whole object is unavailable. */
432 extern int value_entirely_available (struct value *value);
433
434 /* Mark VALUE's content bytes starting at OFFSET and extending for
435 LENGTH bytes as unavailable. */
436
437 extern void mark_value_bytes_unavailable (struct value *value,
438 int offset, int length);
439
440 /* Compare LENGTH bytes of VAL1's contents starting at OFFSET1 with
441 LENGTH bytes of VAL2's contents starting at OFFSET2.
442
443 Note that "contents" refers to the whole value's contents
444 (value_contents_all), without any embedded offset adjustment. For
445 example, to compare a complete object value with itself, including
446 its enclosing type chunk, you'd do:
447
448 int len = TYPE_LENGTH (check_typedef (value_enclosing_type (val)));
449 value_available_contents (val, 0, val, 0, len);
450
451 Returns true iff the set of available contents match. Unavailable
452 contents compare equal with unavailable contents, and different
453 with any available byte. For example, if 'x's represent an
454 unavailable byte, and 'V' and 'Z' represent different available
455 bytes, in a value with length 16:
456
457 offset: 0 4 8 12 16
458 contents: xxxxVVVVxxxxVVZZ
459
460 then:
461
462 value_available_contents_eq(val, 0, val, 8, 6) => 1
463 value_available_contents_eq(val, 0, val, 4, 4) => 1
464 value_available_contents_eq(val, 0, val, 8, 8) => 0
465 value_available_contents_eq(val, 4, val, 12, 2) => 1
466 value_available_contents_eq(val, 4, val, 12, 4) => 0
467 value_available_contents_eq(val, 3, val, 4, 4) => 0
468 */
469
470 extern int value_available_contents_eq (const struct value *val1, int offset1,
471 const struct value *val2, int offset2,
472 int length);
473
474 /* Read LENGTH bytes of memory starting at MEMADDR into BUFFER, which
475 is (or will be copied to) VAL's contents buffer offset by
476 EMBEDDED_OFFSET (that is, to &VAL->contents[EMBEDDED_OFFSET]).
477 Marks value contents ranges as unavailable if the corresponding
478 memory is likewise unavailable. STACK indicates whether the memory
479 is known to be stack memory. */
480
481 extern void read_value_memory (struct value *val, int embedded_offset,
482 int stack, CORE_ADDR memaddr,
483 gdb_byte *buffer, size_t length);
484
485 \f
486
487 #include "symtab.h"
488 #include "gdbtypes.h"
489 #include "expression.h"
490
491 struct frame_info;
492 struct fn_field;
493
494 extern int print_address_demangle (const struct value_print_options *,
495 struct gdbarch *, CORE_ADDR,
496 struct ui_file *, int);
497
498 extern LONGEST value_as_long (struct value *val);
499 extern DOUBLEST value_as_double (struct value *val);
500 extern CORE_ADDR value_as_address (struct value *val);
501
502 extern LONGEST unpack_long (struct type *type, const gdb_byte *valaddr);
503 extern DOUBLEST unpack_double (struct type *type, const gdb_byte *valaddr,
504 int *invp);
505 extern CORE_ADDR unpack_pointer (struct type *type, const gdb_byte *valaddr);
506
507 extern int unpack_value_bits_as_long (struct type *field_type,
508 const gdb_byte *valaddr,
509 int embedded_offset, int bitpos,
510 int bitsize,
511 const struct value *original_value,
512 LONGEST *result);
513
514 extern LONGEST unpack_field_as_long (struct type *type,
515 const gdb_byte *valaddr,
516 int fieldno);
517 extern int unpack_value_field_as_long (struct type *type, const gdb_byte *valaddr,
518 int embedded_offset, int fieldno,
519 const struct value *val, LONGEST *result);
520
521 extern struct value *value_field_bitfield (struct type *type, int fieldno,
522 const gdb_byte *valaddr,
523 int embedded_offset,
524 const struct value *val);
525
526 extern void pack_long (gdb_byte *buf, struct type *type, LONGEST num);
527
528 extern struct value *value_from_longest (struct type *type, LONGEST num);
529 extern struct value *value_from_ulongest (struct type *type, ULONGEST num);
530 extern struct value *value_from_pointer (struct type *type, CORE_ADDR addr);
531 extern struct value *value_from_double (struct type *type, DOUBLEST num);
532 extern struct value *value_from_decfloat (struct type *type,
533 const gdb_byte *decbytes);
534 extern struct value *value_from_history_ref (char *, char **);
535
536 extern struct value *value_at (struct type *type, CORE_ADDR addr);
537 extern struct value *value_at_lazy (struct type *type, CORE_ADDR addr);
538
539 extern struct value *value_from_contents_and_address (struct type *,
540 const gdb_byte *,
541 CORE_ADDR);
542 extern struct value *value_from_contents (struct type *, const gdb_byte *);
543
544 extern struct value *default_value_from_register (struct type *type,
545 int regnum,
546 struct frame_info *frame);
547
548 extern void read_frame_register_value (struct value *value,
549 struct frame_info *frame);
550
551 extern struct value *value_from_register (struct type *type, int regnum,
552 struct frame_info *frame);
553
554 extern CORE_ADDR address_from_register (struct type *type, int regnum,
555 struct frame_info *frame);
556
557 extern struct value *value_of_variable (struct symbol *var,
558 const struct block *b);
559
560 extern struct value *address_of_variable (struct symbol *var, struct block *b);
561
562 extern struct value *value_of_register (int regnum, struct frame_info *frame);
563
564 struct value *value_of_register_lazy (struct frame_info *frame, int regnum);
565
566 extern int symbol_read_needs_frame (struct symbol *);
567
568 extern struct value *read_var_value (struct symbol *var,
569 struct frame_info *frame);
570
571 extern struct value *default_read_var_value (struct symbol *var,
572 struct frame_info *frame);
573
574 extern struct value *allocate_value (struct type *type);
575 extern struct value *allocate_value_lazy (struct type *type);
576 extern void allocate_value_contents (struct value *value);
577 extern void value_contents_copy (struct value *dst, int dst_offset,
578 struct value *src, int src_offset,
579 int length);
580 extern void value_contents_copy_raw (struct value *dst, int dst_offset,
581 struct value *src, int src_offset,
582 int length);
583
584 extern struct value *allocate_repeat_value (struct type *type, int count);
585
586 extern struct value *value_mark (void);
587
588 extern void value_free_to_mark (struct value *mark);
589
590 extern struct value *value_cstring (char *ptr, int len,
591 struct type *char_type);
592 extern struct value *value_string (char *ptr, int len,
593 struct type *char_type);
594 extern struct value *value_bitstring (char *ptr, int len,
595 struct type *index_type);
596
597 extern struct value *value_array (int lowbound, int highbound,
598 struct value **elemvec);
599
600 extern struct value *value_concat (struct value *arg1, struct value *arg2);
601
602 extern struct value *value_binop (struct value *arg1, struct value *arg2,
603 enum exp_opcode op);
604
605 extern struct value *value_ptradd (struct value *arg1, LONGEST arg2);
606
607 extern LONGEST value_ptrdiff (struct value *arg1, struct value *arg2);
608
609 extern int value_must_coerce_to_target (struct value *arg1);
610
611 extern struct value *value_coerce_to_target (struct value *arg1);
612
613 extern struct value *value_coerce_array (struct value *arg1);
614
615 extern struct value *value_coerce_function (struct value *arg1);
616
617 extern struct value *value_ind (struct value *arg1);
618
619 extern struct value *value_addr (struct value *arg1);
620
621 extern struct value *value_ref (struct value *arg1);
622
623 extern struct value *value_assign (struct value *toval,
624 struct value *fromval);
625
626 extern struct value *value_pos (struct value *arg1);
627
628 extern struct value *value_neg (struct value *arg1);
629
630 extern struct value *value_complement (struct value *arg1);
631
632 extern struct value *value_struct_elt (struct value **argp,
633 struct value **args,
634 const char *name, int *static_memfuncp,
635 const char *err);
636
637 extern struct value *value_aggregate_elt (struct type *curtype,
638 char *name,
639 struct type *expect_type,
640 int want_address,
641 enum noside noside);
642
643 extern struct value *value_static_field (struct type *type, int fieldno);
644
645 enum oload_search_type { NON_METHOD, METHOD, BOTH };
646
647 extern int find_overload_match (struct value **args, int nargs,
648 const char *name,
649 enum oload_search_type method, int lax,
650 struct value **objp, struct symbol *fsym,
651 struct value **valp, struct symbol **symp,
652 int *staticp, const int no_adl);
653
654 extern struct value *value_field (struct value *arg1, int fieldno);
655
656 extern struct value *value_primitive_field (struct value *arg1, int offset,
657 int fieldno,
658 struct type *arg_type);
659
660
661 extern struct type *value_rtti_indirect_type (struct value *, int *, int *,
662 int *);
663
664 extern struct value *value_full_object (struct value *, struct type *, int,
665 int, int);
666
667 extern struct value *value_cast_pointers (struct type *, struct value *, int);
668
669 extern struct value *value_cast (struct type *type, struct value *arg2);
670
671 extern struct value *value_reinterpret_cast (struct type *type,
672 struct value *arg);
673
674 extern struct value *value_dynamic_cast (struct type *type, struct value *arg);
675
676 extern struct value *value_zero (struct type *type, enum lval_type lv);
677
678 extern struct value *value_one (struct type *type);
679
680 extern struct value *value_repeat (struct value *arg1, int count);
681
682 extern struct value *value_subscript (struct value *array, LONGEST index);
683
684 extern struct value *value_bitstring_subscript (struct type *type,
685 struct value *bitstring,
686 LONGEST index);
687
688 extern struct value *register_value_being_returned (struct type *valtype,
689 struct regcache *retbuf);
690
691 extern int value_in (struct value *element, struct value *set);
692
693 extern int value_bit_index (struct type *type, const gdb_byte *addr,
694 int index);
695
696 extern int using_struct_return (struct gdbarch *gdbarch,
697 struct value *function,
698 struct type *value_type);
699
700 extern struct value *evaluate_expression (struct expression *exp);
701
702 extern struct value *evaluate_type (struct expression *exp);
703
704 extern struct value *evaluate_subexp (struct type *expect_type,
705 struct expression *exp,
706 int *pos, enum noside noside);
707
708 extern struct value *evaluate_subexpression_type (struct expression *exp,
709 int subexp);
710
711 extern void fetch_subexp_value (struct expression *exp, int *pc,
712 struct value **valp, struct value **resultp,
713 struct value **val_chain);
714
715 extern char *extract_field_op (struct expression *exp, int *subexp);
716
717 extern struct value *evaluate_subexp_with_coercion (struct expression *,
718 int *, enum noside);
719
720 extern struct value *parse_and_eval (char *exp);
721
722 extern struct value *parse_to_comma_and_eval (char **expp);
723
724 extern struct type *parse_and_eval_type (char *p, int length);
725
726 extern CORE_ADDR parse_and_eval_address (char *exp);
727
728 extern LONGEST parse_and_eval_long (char *exp);
729
730 extern void unop_promote (const struct language_defn *language,
731 struct gdbarch *gdbarch,
732 struct value **arg1);
733
734 extern void binop_promote (const struct language_defn *language,
735 struct gdbarch *gdbarch,
736 struct value **arg1, struct value **arg2);
737
738 extern struct value *access_value_history (int num);
739
740 extern struct value *value_of_internalvar (struct gdbarch *gdbarch,
741 struct internalvar *var);
742
743 extern int get_internalvar_integer (struct internalvar *var, LONGEST *l);
744
745 extern void set_internalvar (struct internalvar *var, struct value *val);
746
747 extern void set_internalvar_integer (struct internalvar *var, LONGEST l);
748
749 extern void set_internalvar_string (struct internalvar *var,
750 const char *string);
751
752 extern void clear_internalvar (struct internalvar *var);
753
754 extern void set_internalvar_component (struct internalvar *var,
755 int offset,
756 int bitpos, int bitsize,
757 struct value *newvalue);
758
759 extern struct internalvar *lookup_only_internalvar (const char *name);
760
761 extern struct internalvar *create_internalvar (const char *name);
762
763 extern VEC (char_ptr) *complete_internalvar (const char *name);
764
765 /* An internalvar can be dynamically computed by supplying a vector of
766 function pointers to perform various operations. */
767
768 struct internalvar_funcs
769 {
770 /* Compute the value of the variable. The DATA argument passed to
771 the function is the same argument that was passed to
772 `create_internalvar_type_lazy'. */
773
774 struct value *(*make_value) (struct gdbarch *arch,
775 struct internalvar *var,
776 void *data);
777
778 /* Update the agent expression EXPR with bytecode to compute the
779 value. VALUE is the agent value we are updating. The DATA
780 argument passed to this function is the same argument that was
781 passed to `create_internalvar_type_lazy'. If this pointer is
782 NULL, then the internalvar cannot be compiled to an agent
783 expression. */
784
785 void (*compile_to_ax) (struct internalvar *var,
786 struct agent_expr *expr,
787 struct axs_value *value,
788 void *data);
789
790 /* If non-NULL, this is called to destroy DATA. The DATA argument
791 passed to this function is the same argument that was passed to
792 `create_internalvar_type_lazy'. */
793
794 void (*destroy) (void *data);
795 };
796
797 extern struct internalvar *
798 create_internalvar_type_lazy (const char *name,
799 const struct internalvar_funcs *funcs,
800 void *data);
801
802 /* Compile an internal variable to an agent expression. VAR is the
803 variable to compile; EXPR and VALUE are the agent expression we are
804 updating. This will return 0 if there is no known way to compile
805 VAR, and 1 if VAR was successfully compiled. It may also throw an
806 exception on error. */
807
808 extern int compile_internalvar_to_ax (struct internalvar *var,
809 struct agent_expr *expr,
810 struct axs_value *value);
811
812 extern struct internalvar *lookup_internalvar (const char *name);
813
814 extern int value_equal (struct value *arg1, struct value *arg2);
815
816 extern int value_equal_contents (struct value *arg1, struct value *arg2);
817
818 extern int value_less (struct value *arg1, struct value *arg2);
819
820 extern int value_logical_not (struct value *arg1);
821
822 /* C++ */
823
824 extern struct value *value_of_this (const struct language_defn *lang);
825
826 extern struct value *value_of_this_silent (const struct language_defn *lang);
827
828 extern struct value *value_x_binop (struct value *arg1, struct value *arg2,
829 enum exp_opcode op,
830 enum exp_opcode otherop,
831 enum noside noside);
832
833 extern struct value *value_x_unop (struct value *arg1, enum exp_opcode op,
834 enum noside noside);
835
836 extern struct value *value_fn_field (struct value **arg1p, struct fn_field *f,
837 int j, struct type *type, int offset);
838
839 extern int binop_types_user_defined_p (enum exp_opcode op,
840 struct type *type1,
841 struct type *type2);
842
843 extern int binop_user_defined_p (enum exp_opcode op, struct value *arg1,
844 struct value *arg2);
845
846 extern int unop_user_defined_p (enum exp_opcode op, struct value *arg1);
847
848 extern int destructor_name_p (const char *name, struct type *type);
849
850 extern void value_incref (struct value *val);
851
852 extern void value_free (struct value *val);
853
854 extern void free_all_values (void);
855
856 extern void free_value_chain (struct value *v);
857
858 extern void release_value (struct value *val);
859
860 extern void release_value_or_incref (struct value *val);
861
862 extern int record_latest_value (struct value *val);
863
864 extern void modify_field (struct type *type, gdb_byte *addr,
865 LONGEST fieldval, int bitpos, int bitsize);
866
867 extern void type_print (struct type *type, const char *varstring,
868 struct ui_file *stream, int show);
869
870 extern char *type_to_string (struct type *type);
871
872 extern gdb_byte *baseclass_addr (struct type *type, int index,
873 gdb_byte *valaddr,
874 struct value **valuep, int *errp);
875
876 extern void print_longest (struct ui_file *stream, int format,
877 int use_local, LONGEST val);
878
879 extern void print_floating (const gdb_byte *valaddr, struct type *type,
880 struct ui_file *stream);
881
882 extern void print_decimal_floating (const gdb_byte *valaddr, struct type *type,
883 struct ui_file *stream);
884
885 extern void value_print (struct value *val, struct ui_file *stream,
886 const struct value_print_options *options);
887
888 extern void value_print_array_elements (struct value *val,
889 struct ui_file *stream, int format,
890 enum val_prettyprint pretty);
891
892 extern struct value *value_release_to_mark (struct value *mark);
893
894 extern void val_print (struct type *type, const gdb_byte *valaddr,
895 int embedded_offset, CORE_ADDR address,
896 struct ui_file *stream, int recurse,
897 const struct value *val,
898 const struct value_print_options *options,
899 const struct language_defn *language);
900
901 extern void common_val_print (struct value *val,
902 struct ui_file *stream, int recurse,
903 const struct value_print_options *options,
904 const struct language_defn *language);
905
906 extern int val_print_string (struct type *elttype, const char *encoding,
907 CORE_ADDR addr, int len,
908 struct ui_file *stream,
909 const struct value_print_options *options);
910
911 extern void print_variable_and_value (const char *name,
912 struct symbol *var,
913 struct frame_info *frame,
914 struct ui_file *stream,
915 int indent);
916
917 extern int check_field (struct type *, const char *);
918
919 extern void typedef_print (struct type *type, struct symbol *news,
920 struct ui_file *stream);
921
922 extern char *internalvar_name (struct internalvar *var);
923
924 extern void preserve_values (struct objfile *);
925
926 /* From values.c */
927
928 extern struct value *value_copy (struct value *);
929
930 extern struct value *value_non_lval (struct value *);
931
932 extern void preserve_one_value (struct value *, struct objfile *, htab_t);
933
934 /* From valops.c */
935
936 extern struct value *varying_to_slice (struct value *);
937
938 extern struct value *value_slice (struct value *, int, int);
939
940 extern struct value *value_literal_complex (struct value *, struct value *,
941 struct type *);
942
943 extern struct value *find_function_in_inferior (const char *,
944 struct objfile **);
945
946 extern struct value *value_allocate_space_in_inferior (int);
947
948 extern struct value *value_subscripted_rvalue (struct value *array,
949 LONGEST index, int lowerbound);
950
951 /* User function handler. */
952
953 typedef struct value *(*internal_function_fn) (struct gdbarch *gdbarch,
954 const struct language_defn *language,
955 void *cookie,
956 int argc,
957 struct value **argv);
958
959 void add_internal_function (const char *name, const char *doc,
960 internal_function_fn handler,
961 void *cookie);
962
963 struct value *call_internal_function (struct gdbarch *gdbarch,
964 const struct language_defn *language,
965 struct value *function,
966 int argc, struct value **argv);
967
968 char *value_internal_function_name (struct value *);
969
970 #endif /* !defined (VALUE_H) */