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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
26struct block;
27struct expression;
28struct regcache;
29struct symbol;
30struct type;
31struct ui_file;
32struct language_defn;
33struct 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
40struct 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
47struct value *value_next (struct value *);
48
49/* Type of the value. */
50
51extern 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
57extern 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
62extern int value_bitsize (const struct value *);
63extern 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
69extern int value_bitpos (const struct value *);
70extern 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
76struct value *value_parent (struct value *);
77extern 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
85extern int value_offset (const struct value *);
86extern 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
92extern int deprecated_value_modifiable (struct value *value);
93extern 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
137extern struct type *value_enclosing_type (struct value *);
138extern 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
153extern struct type *value_actual_type (struct value *value,
154 int resolve_simple_types,
155 int *real_type_found);
156
157extern int value_pointed_to_offset (struct value *value);
158extern void set_value_pointed_to_offset (struct value *value, int val);
159extern int value_embedded_offset (struct value *value);
160extern 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
170struct 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
228extern 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
242extern int valprint_check_validity (struct ui_file *stream, struct type *type,
243 int embedded_offset,
244 const struct value *val);
245
246extern struct value *allocate_optimized_out_value (struct type *type);
247
248/* If VALUE is lval_computed, return its lval_funcs structure. */
249
250extern 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
255extern 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
272extern int value_lazy (struct value *);
273extern void set_value_lazy (struct value *value, int val);
274
275extern int value_stack (struct value *);
276extern 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
292extern 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
300extern const gdb_byte *value_contents (struct value *);
301extern 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
306extern gdb_byte *value_contents_all_raw (struct value *);
307extern 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. */
312extern 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. */
317extern const gdb_byte *
318 value_contents_for_printing_const (const struct value *value);
319
320extern int value_fetch_lazy (struct value *val);
321extern 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. */
325extern int value_optimized_out (struct value *value);
326extern 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. */
330extern 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. */
335extern int value_initialized (struct value *);
336extern 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. */
340extern 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. */
348extern 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. */
352extern 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. */
358extern CORE_ADDR value_address (const struct value *);
359
360/* Like value_address, except the result does not include value's
361 offset. */
362extern CORE_ADDR value_raw_address (struct value *);
363
364/* Set the address of a value. */
365extern void set_value_address (struct value *, CORE_ADDR);
366
367/* Pointer to internal variable. */
368extern 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". */
373extern 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. */
377extern 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
383extern 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
393extern 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
400extern 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
407extern 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
413extern 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
419extern 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
427extern 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. */
432extern 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
437extern 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
470extern 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
481extern 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
491struct frame_info;
492struct fn_field;
493
494extern void print_address_demangle (struct gdbarch *, CORE_ADDR,
495 struct ui_file *, int);
496
497extern LONGEST value_as_long (struct value *val);
498extern DOUBLEST value_as_double (struct value *val);
499extern CORE_ADDR value_as_address (struct value *val);
500
501extern LONGEST unpack_long (struct type *type, const gdb_byte *valaddr);
502extern DOUBLEST unpack_double (struct type *type, const gdb_byte *valaddr,
503 int *invp);
504extern CORE_ADDR unpack_pointer (struct type *type, const gdb_byte *valaddr);
505
506extern int unpack_value_bits_as_long (struct type *field_type,
507 const gdb_byte *valaddr,
508 int embedded_offset, int bitpos,
509 int bitsize,
510 const struct value *original_value,
511 LONGEST *result);
512
513extern LONGEST unpack_field_as_long (struct type *type,
514 const gdb_byte *valaddr,
515 int fieldno);
516extern int unpack_value_field_as_long (struct type *type, const gdb_byte *valaddr,
517 int embedded_offset, int fieldno,
518 const struct value *val, LONGEST *result);
519
520extern struct value *value_field_bitfield (struct type *type, int fieldno,
521 const gdb_byte *valaddr,
522 int embedded_offset,
523 const struct value *val);
524
525extern void pack_long (gdb_byte *buf, struct type *type, LONGEST num);
526
527extern struct value *value_from_longest (struct type *type, LONGEST num);
528extern struct value *value_from_ulongest (struct type *type, ULONGEST num);
529extern struct value *value_from_pointer (struct type *type, CORE_ADDR addr);
530extern struct value *value_from_double (struct type *type, DOUBLEST num);
531extern struct value *value_from_decfloat (struct type *type,
532 const gdb_byte *decbytes);
533extern struct value *value_from_history_ref (char *, char **);
534
535extern struct value *value_at (struct type *type, CORE_ADDR addr);
536extern struct value *value_at_lazy (struct type *type, CORE_ADDR addr);
537
538extern struct value *value_from_contents_and_address (struct type *,
539 const gdb_byte *,
540 CORE_ADDR);
541extern struct value *value_from_contents (struct type *, const gdb_byte *);
542
543extern struct value *default_value_from_register (struct type *type,
544 int regnum,
545 struct frame_info *frame);
546
547extern void read_frame_register_value (struct value *value,
548 struct frame_info *frame);
549
550extern struct value *value_from_register (struct type *type, int regnum,
551 struct frame_info *frame);
552
553extern CORE_ADDR address_from_register (struct type *type, int regnum,
554 struct frame_info *frame);
555
556extern struct value *value_of_variable (struct symbol *var,
557 const struct block *b);
558
559extern struct value *address_of_variable (struct symbol *var, struct block *b);
560
561extern struct value *value_of_register (int regnum, struct frame_info *frame);
562
563struct value *value_of_register_lazy (struct frame_info *frame, int regnum);
564
565extern int symbol_read_needs_frame (struct symbol *);
566
567extern struct value *read_var_value (struct symbol *var,
568 struct frame_info *frame);
569
570extern struct value *default_read_var_value (struct symbol *var,
571 struct frame_info *frame);
572
573extern struct value *allocate_value (struct type *type);
574extern struct value *allocate_value_lazy (struct type *type);
575extern void allocate_value_contents (struct value *value);
576extern void value_contents_copy (struct value *dst, int dst_offset,
577 struct value *src, int src_offset,
578 int length);
579extern void value_contents_copy_raw (struct value *dst, int dst_offset,
580 struct value *src, int src_offset,
581 int length);
582
583extern struct value *allocate_repeat_value (struct type *type, int count);
584
585extern struct value *value_mark (void);
586
587extern void value_free_to_mark (struct value *mark);
588
589extern struct value *value_cstring (char *ptr, int len,
590 struct type *char_type);
591extern struct value *value_string (char *ptr, int len,
592 struct type *char_type);
593extern struct value *value_bitstring (char *ptr, int len,
594 struct type *index_type);
595
596extern struct value *value_array (int lowbound, int highbound,
597 struct value **elemvec);
598
599extern struct value *value_concat (struct value *arg1, struct value *arg2);
600
601extern struct value *value_binop (struct value *arg1, struct value *arg2,
602 enum exp_opcode op);
603
604extern struct value *value_ptradd (struct value *arg1, LONGEST arg2);
605
606extern LONGEST value_ptrdiff (struct value *arg1, struct value *arg2);
607
608extern int value_must_coerce_to_target (struct value *arg1);
609
610extern struct value *value_coerce_to_target (struct value *arg1);
611
612extern struct value *value_coerce_array (struct value *arg1);
613
614extern struct value *value_coerce_function (struct value *arg1);
615
616extern struct value *value_ind (struct value *arg1);
617
618extern struct value *value_addr (struct value *arg1);
619
620extern struct value *value_ref (struct value *arg1);
621
622extern struct value *value_assign (struct value *toval,
623 struct value *fromval);
624
625extern struct value *value_pos (struct value *arg1);
626
627extern struct value *value_neg (struct value *arg1);
628
629extern struct value *value_complement (struct value *arg1);
630
631extern struct value *value_struct_elt (struct value **argp,
632 struct value **args,
633 const char *name, int *static_memfuncp,
634 const char *err);
635
636extern struct value *value_aggregate_elt (struct type *curtype,
637 char *name,
638 struct type *expect_type,
639 int want_address,
640 enum noside noside);
641
642extern struct value *value_static_field (struct type *type, int fieldno);
643
644extern struct fn_field *value_find_oload_method_list (struct value **,
645 const char *,
646 int, int *,
647 struct type **, int *);
648
649enum oload_search_type { NON_METHOD, METHOD, BOTH };
650
651extern int find_overload_match (struct value **args, int nargs,
652 const char *name,
653 enum oload_search_type method, int lax,
654 struct value **objp, struct symbol *fsym,
655 struct value **valp, struct symbol **symp,
656 int *staticp, const int no_adl);
657
658extern struct value *value_field (struct value *arg1, int fieldno);
659
660extern struct value *value_primitive_field (struct value *arg1, int offset,
661 int fieldno,
662 struct type *arg_type);
663
664
665extern struct type *value_rtti_indirect_type (struct value *, int *, int *,
666 int *);
667
668extern struct value *value_full_object (struct value *, struct type *, int,
669 int, int);
670
671extern struct value *value_cast_pointers (struct type *, struct value *);
672
673extern struct value *value_cast (struct type *type, struct value *arg2);
674
675extern struct value *value_reinterpret_cast (struct type *type,
676 struct value *arg);
677
678extern struct value *value_dynamic_cast (struct type *type, struct value *arg);
679
680extern struct value *value_zero (struct type *type, enum lval_type lv);
681
682extern struct value *value_one (struct type *type);
683
684extern struct value *value_repeat (struct value *arg1, int count);
685
686extern struct value *value_subscript (struct value *array, LONGEST index);
687
688extern struct value *value_bitstring_subscript (struct type *type,
689 struct value *bitstring,
690 LONGEST index);
691
692extern struct value *register_value_being_returned (struct type *valtype,
693 struct regcache *retbuf);
694
695extern int value_in (struct value *element, struct value *set);
696
697extern int value_bit_index (struct type *type, const gdb_byte *addr,
698 int index);
699
700extern int using_struct_return (struct gdbarch *gdbarch,
701 struct type *func_type,
702 struct type *value_type);
703
704extern struct value *evaluate_expression (struct expression *exp);
705
706extern struct value *evaluate_type (struct expression *exp);
707
708extern struct value *evaluate_subexp (struct type *expect_type,
709 struct expression *exp,
710 int *pos, enum noside noside);
711
712extern struct value *evaluate_subexpression_type (struct expression *exp,
713 int subexp);
714
715extern void fetch_subexp_value (struct expression *exp, int *pc,
716 struct value **valp, struct value **resultp,
717 struct value **val_chain);
718
719extern char *extract_field_op (struct expression *exp, int *subexp);
720
721extern struct value *evaluate_subexp_with_coercion (struct expression *,
722 int *, enum noside);
723
724extern struct value *parse_and_eval (char *exp);
725
726extern struct value *parse_to_comma_and_eval (char **expp);
727
728extern struct type *parse_and_eval_type (char *p, int length);
729
730extern CORE_ADDR parse_and_eval_address (char *exp);
731
732extern LONGEST parse_and_eval_long (char *exp);
733
734extern void unop_promote (const struct language_defn *language,
735 struct gdbarch *gdbarch,
736 struct value **arg1);
737
738extern void binop_promote (const struct language_defn *language,
739 struct gdbarch *gdbarch,
740 struct value **arg1, struct value **arg2);
741
742extern struct value *access_value_history (int num);
743
744extern struct value *value_of_internalvar (struct gdbarch *gdbarch,
745 struct internalvar *var);
746
747extern int get_internalvar_integer (struct internalvar *var, LONGEST *l);
748
749extern void set_internalvar (struct internalvar *var, struct value *val);
750
751extern void set_internalvar_integer (struct internalvar *var, LONGEST l);
752
753extern void set_internalvar_string (struct internalvar *var,
754 const char *string);
755
756extern void clear_internalvar (struct internalvar *var);
757
758extern void set_internalvar_component (struct internalvar *var,
759 int offset,
760 int bitpos, int bitsize,
761 struct value *newvalue);
762
763extern struct internalvar *lookup_only_internalvar (const char *name);
764
765extern struct internalvar *create_internalvar (const char *name);
766
767typedef struct value * (*internalvar_make_value) (struct gdbarch *,
768 struct internalvar *);
769extern struct internalvar *
770 create_internalvar_type_lazy (char *name, internalvar_make_value fun);
771
772extern struct internalvar *lookup_internalvar (const char *name);
773
774extern int value_equal (struct value *arg1, struct value *arg2);
775
776extern int value_equal_contents (struct value *arg1, struct value *arg2);
777
778extern int value_less (struct value *arg1, struct value *arg2);
779
780extern int value_logical_not (struct value *arg1);
781
782/* C++ */
783
784extern struct value *value_of_this (const struct language_defn *lang);
785
786extern struct value *value_of_this_silent (const struct language_defn *lang);
787
788extern struct value *value_x_binop (struct value *arg1, struct value *arg2,
789 enum exp_opcode op,
790 enum exp_opcode otherop,
791 enum noside noside);
792
793extern struct value *value_x_unop (struct value *arg1, enum exp_opcode op,
794 enum noside noside);
795
796extern struct value *value_fn_field (struct value **arg1p, struct fn_field *f,
797 int j, struct type *type, int offset);
798
799extern int binop_types_user_defined_p (enum exp_opcode op,
800 struct type *type1,
801 struct type *type2);
802
803extern int binop_user_defined_p (enum exp_opcode op, struct value *arg1,
804 struct value *arg2);
805
806extern int unop_user_defined_p (enum exp_opcode op, struct value *arg1);
807
808extern int destructor_name_p (const char *name, struct type *type);
809
810extern void value_incref (struct value *val);
811
812extern void value_free (struct value *val);
813
814extern void free_all_values (void);
815
816extern void free_value_chain (struct value *v);
817
818extern void release_value (struct value *val);
819
820extern void release_value_or_incref (struct value *val);
821
822extern int record_latest_value (struct value *val);
823
824extern void modify_field (struct type *type, gdb_byte *addr,
825 LONGEST fieldval, int bitpos, int bitsize);
826
827extern void type_print (struct type *type, const char *varstring,
828 struct ui_file *stream, int show);
829
830extern char *type_to_string (struct type *type);
831
832extern gdb_byte *baseclass_addr (struct type *type, int index,
833 gdb_byte *valaddr,
834 struct value **valuep, int *errp);
835
836extern void print_longest (struct ui_file *stream, int format,
837 int use_local, LONGEST val);
838
839extern void print_floating (const gdb_byte *valaddr, struct type *type,
840 struct ui_file *stream);
841
842extern void print_decimal_floating (const gdb_byte *valaddr, struct type *type,
843 struct ui_file *stream);
844
845extern void value_print (struct value *val, struct ui_file *stream,
846 const struct value_print_options *options);
847
848extern void value_print_array_elements (struct value *val,
849 struct ui_file *stream, int format,
850 enum val_prettyprint pretty);
851
852extern struct value *value_release_to_mark (struct value *mark);
853
854extern void val_print (struct type *type, const gdb_byte *valaddr,
855 int embedded_offset, CORE_ADDR address,
856 struct ui_file *stream, int recurse,
857 const struct value *val,
858 const struct value_print_options *options,
859 const struct language_defn *language);
860
861extern void common_val_print (struct value *val,
862 struct ui_file *stream, int recurse,
863 const struct value_print_options *options,
864 const struct language_defn *language);
865
866extern int val_print_string (struct type *elttype, const char *encoding,
867 CORE_ADDR addr, int len,
868 struct ui_file *stream,
869 const struct value_print_options *options);
870
871extern void print_variable_and_value (const char *name,
872 struct symbol *var,
873 struct frame_info *frame,
874 struct ui_file *stream,
875 int indent);
876
877extern int check_field (struct type *, const char *);
878
879extern void typedef_print (struct type *type, struct symbol *news,
880 struct ui_file *stream);
881
882extern char *internalvar_name (struct internalvar *var);
883
884extern void preserve_values (struct objfile *);
885
886/* From values.c */
887
888extern struct value *value_copy (struct value *);
889
890extern struct value *value_non_lval (struct value *);
891
892extern void preserve_one_value (struct value *, struct objfile *, htab_t);
893
894/* From valops.c */
895
896extern struct value *varying_to_slice (struct value *);
897
898extern struct value *value_slice (struct value *, int, int);
899
900extern struct value *value_literal_complex (struct value *, struct value *,
901 struct type *);
902
903extern struct value *find_function_in_inferior (const char *,
904 struct objfile **);
905
906extern struct value *value_allocate_space_in_inferior (int);
907
908extern struct value *value_subscripted_rvalue (struct value *array,
909 LONGEST index, int lowerbound);
910
911/* User function handler. */
912
913typedef struct value *(*internal_function_fn) (struct gdbarch *gdbarch,
914 const struct language_defn *language,
915 void *cookie,
916 int argc,
917 struct value **argv);
918
919void add_internal_function (const char *name, const char *doc,
920 internal_function_fn handler,
921 void *cookie);
922
923struct value *call_internal_function (struct gdbarch *gdbarch,
924 const struct language_defn *language,
925 struct value *function,
926 int argc, struct value **argv);
927
928char *value_internal_function_name (struct value *);
929
930#endif /* !defined (VALUE_H) */
GDB Binutils - Deliverables
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