1 /* Definitions for values of C expressions, for GDB.
3 Copyright (C) 1986-2013 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
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/>. */
20 #if !defined (VALUE_H)
24 #include "frame.h" /* For struct frame_id. */
33 struct value_print_options
;
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
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
47 struct value
*value_next (struct value
*);
49 /* Type of the value. */
51 extern struct type
*value_type (const struct value
*);
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). */
57 extern void deprecated_set_value_type (struct value
*value
,
60 /* Only used for bitfields; number of bits contained in them. */
62 extern int value_bitsize (const struct value
*);
63 extern void set_value_bitsize (struct value
*, int bit
);
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. */
69 extern int value_bitpos (const struct value
*);
70 extern void set_value_bitpos (struct value
*, int bit
);
72 /* Only used for bitfields; the containing value. This allows a
73 single read from the target when displaying multiple
76 struct value
*value_parent (struct value
*);
77 extern void set_value_parent (struct value
*value
, struct value
*parent
);
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. */
85 extern int value_offset (const struct value
*);
86 extern void set_value_offset (struct value
*, int offset
);
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? */
92 extern int deprecated_value_modifiable (struct value
*value
);
94 /* If a value represents a C++ object, then the `type' field gives the
95 object's compile-time type. If the object actually belongs to some
96 class derived from `type', perhaps with other base classes and
97 additional members, then `type' is just a subobject of the real
98 thing, and the full object is probably larger than `type' would
101 If `type' is a dynamic class (i.e. one with a vtable), then GDB can
102 actually determine the object's run-time type by looking at the
103 run-time type information in the vtable. When this information is
104 available, we may elect to read in the entire object, for several
107 - When printing the value, the user would probably rather see the
108 full object, not just the limited portion apparent from the
111 - If `type' has virtual base classes, then even printing `type'
112 alone may require reaching outside the `type' portion of the
113 object to wherever the virtual base class has been stored.
115 When we store the entire object, `enclosing_type' is the run-time
116 type -- the complete object -- and `embedded_offset' is the offset
117 of `type' within that larger type, in bytes. The value_contents()
118 macro takes `embedded_offset' into account, so most GDB code
119 continues to see the `type' portion of the value, just as the
122 If `type' is a pointer to an object, then `enclosing_type' is a
123 pointer to the object's run-time type, and `pointed_to_offset' is
124 the offset in bytes from the full object to the pointed-to object
125 -- that is, the value `embedded_offset' would have if we followed
126 the pointer and fetched the complete object. (I don't really see
127 the point. Why not just determine the run-time type when you
128 indirect, and avoid the special case? The contents don't matter
129 until you indirect anyway.)
131 If we're not doing anything fancy, `enclosing_type' is equal to
132 `type', and `embedded_offset' is zero, so everything works
135 extern struct type
*value_enclosing_type (struct value
*);
136 extern void set_value_enclosing_type (struct value
*val
,
137 struct type
*new_type
);
139 /* Returns value_type or value_enclosing_type depending on
140 value_print_options.objectprint.
142 If RESOLVE_SIMPLE_TYPES is 0 the enclosing type will be resolved
143 only for pointers and references, else it will be returned
144 for all the types (e.g. structures). This option is useful
145 to prevent retrieving enclosing type for the base classes fields.
147 REAL_TYPE_FOUND is used to inform whether the real type was found
148 (or just static type was used). The NULL may be passed if it is not
151 extern struct type
*value_actual_type (struct value
*value
,
152 int resolve_simple_types
,
153 int *real_type_found
);
155 extern int value_pointed_to_offset (struct value
*value
);
156 extern void set_value_pointed_to_offset (struct value
*value
, int val
);
157 extern int value_embedded_offset (struct value
*value
);
158 extern void set_value_embedded_offset (struct value
*value
, int val
);
160 /* For lval_computed values, this structure holds functions used to
161 retrieve and set the value (or portions of the value).
163 For each function, 'V' is the 'this' pointer: an lval_funcs
164 function F may always assume that the V it receives is an
165 lval_computed value, and has F in the appropriate slot of its
166 lval_funcs structure. */
170 /* Fill in VALUE's contents. This is used to "un-lazy" values. If
171 a problem arises in obtaining VALUE's bits, this function should
172 call 'error'. If it is NULL value_fetch_lazy on "un-lazy"
173 non-optimized-out value is an internal error. */
174 void (*read
) (struct value
*v
);
176 /* Handle an assignment TOVAL = FROMVAL by writing the value of
177 FROMVAL to TOVAL's location. The contents of TOVAL have not yet
178 been updated. If a problem arises in doing so, this function
179 should call 'error'. If it is NULL such TOVAL assignment is an error as
180 TOVAL is not considered as an lvalue. */
181 void (*write
) (struct value
*toval
, struct value
*fromval
);
183 /* Check the validity of some bits in VALUE. This should return 1
184 if all the bits starting at OFFSET and extending for LENGTH bits
185 are valid, or 0 if any bit is invalid. */
186 int (*check_validity
) (const struct value
*value
, int offset
, int length
);
188 /* Return 1 if any bit in VALUE is valid, 0 if they are all invalid. */
189 int (*check_any_valid
) (const struct value
*value
);
191 /* If non-NULL, this is used to implement pointer indirection for
192 this value. This method may return NULL, in which case value_ind
193 will fall back to ordinary indirection. */
194 struct value
*(*indirect
) (struct value
*value
);
196 /* If non-NULL, this is used to implement reference resolving for
197 this value. This method may return NULL, in which case coerce_ref
198 will fall back to ordinary references resolving. */
199 struct value
*(*coerce_ref
) (const struct value
*value
);
201 /* If non-NULL, this is used to determine whether the indicated bits
202 of VALUE are a synthetic pointer. */
203 int (*check_synthetic_pointer
) (const struct value
*value
,
204 int offset
, int length
);
206 /* Return a duplicate of VALUE's closure, for use in a new value.
207 This may simply return the same closure, if VALUE's is
208 reference-counted or statically allocated.
210 This may be NULL, in which case VALUE's closure is re-used in the
212 void *(*copy_closure
) (const struct value
*v
);
214 /* Drop VALUE's reference to its closure. Maybe this frees the
215 closure; maybe this decrements a reference count; maybe the
216 closure is statically allocated and this does nothing.
218 This may be NULL, in which case no action is taken to free
220 void (*free_closure
) (struct value
*v
);
223 /* Create a computed lvalue, with type TYPE, function pointers FUNCS,
224 and closure CLOSURE. */
226 extern struct value
*allocate_computed_value (struct type
*type
,
227 const struct lval_funcs
*funcs
,
230 /* Helper function to check the validity of some bits of a value.
232 If TYPE represents some aggregate type (e.g., a structure), return 1.
234 Otherwise, any of the bytes starting at OFFSET and extending for
235 TYPE_LENGTH(TYPE) bytes are invalid, print a message to STREAM and
236 return 0. The checking is done using FUNCS.
238 Otherwise, return 1. */
240 extern int valprint_check_validity (struct ui_file
*stream
, struct type
*type
,
242 const struct value
*val
);
244 extern struct value
*allocate_optimized_out_value (struct type
*type
);
246 /* If VALUE is lval_computed, return its lval_funcs structure. */
248 extern const struct lval_funcs
*value_computed_funcs (const struct value
*);
250 /* If VALUE is lval_computed, return its closure. The meaning of the
251 returned value depends on the functions VALUE uses. */
253 extern void *value_computed_closure (const struct value
*value
);
255 /* If zero, contents of this value are in the contents field. If
256 nonzero, contents are in inferior. If the lval field is lval_memory,
257 the contents are in inferior memory at location.address plus offset.
258 The lval field may also be lval_register.
260 WARNING: This field is used by the code which handles watchpoints
261 (see breakpoint.c) to decide whether a particular value can be
262 watched by hardware watchpoints. If the lazy flag is set for some
263 member of a value chain, it is assumed that this member of the
264 chain doesn't need to be watched as part of watching the value
265 itself. This is how GDB avoids watching the entire struct or array
266 when the user wants to watch a single struct member or array
267 element. If you ever change the way lazy flag is set and reset, be
268 sure to consider this use as well! */
270 extern int value_lazy (struct value
*);
271 extern void set_value_lazy (struct value
*value
, int val
);
273 extern int value_stack (struct value
*);
274 extern void set_value_stack (struct value
*value
, int val
);
276 /* value_contents() and value_contents_raw() both return the address
277 of the gdb buffer used to hold a copy of the contents of the lval.
278 value_contents() is used when the contents of the buffer are needed
279 -- it uses value_fetch_lazy() to load the buffer from the process
280 being debugged if it hasn't already been loaded
281 (value_contents_writeable() is used when a writeable but fetched
282 buffer is required).. value_contents_raw() is used when data is
283 being stored into the buffer, or when it is certain that the
284 contents of the buffer are valid.
286 Note: The contents pointer is adjusted by the offset required to
287 get to the real subobject, if the value happens to represent
288 something embedded in a larger run-time object. */
290 extern gdb_byte
*value_contents_raw (struct value
*);
292 /* Actual contents of the value. For use of this value; setting it
293 uses the stuff above. Not valid if lazy is nonzero. Target
294 byte-order. We force it to be aligned properly for any possible
295 value. Note that a value therefore extends beyond what is
298 extern const gdb_byte
*value_contents (struct value
*);
299 extern gdb_byte
*value_contents_writeable (struct value
*);
301 /* The ALL variants of the above two macros do not adjust the returned
302 pointer by the embedded_offset value. */
304 extern gdb_byte
*value_contents_all_raw (struct value
*);
305 extern const gdb_byte
*value_contents_all (struct value
*);
307 /* Like value_contents_all, but does not require that the returned
308 bits be valid. This should only be used in situations where you
309 plan to check the validity manually. */
310 extern const gdb_byte
*value_contents_for_printing (struct value
*value
);
312 /* Like value_contents_for_printing, but accepts a constant value
313 pointer. Unlike value_contents_for_printing however, the pointed
314 value must _not_ be lazy. */
315 extern const gdb_byte
*
316 value_contents_for_printing_const (const struct value
*value
);
318 extern int value_fetch_lazy (struct value
*val
);
319 extern int value_contents_equal (struct value
*val1
, struct value
*val2
);
321 /* If nonzero, this is the value of a variable which does not actually
322 exist in the program. */
323 extern int value_optimized_out (struct value
*value
);
324 extern void set_value_optimized_out (struct value
*value
, int val
);
326 /* Like value_optimized_out, but return false if any bit in the object
328 extern int value_entirely_optimized_out (const struct value
*value
);
330 /* Set or return field indicating whether a variable is initialized or
331 not, based on debugging information supplied by the compiler.
332 1 = initialized; 0 = uninitialized. */
333 extern int value_initialized (struct value
*);
334 extern void set_value_initialized (struct value
*, int);
336 /* Set COMPONENT's location as appropriate for a component of WHOLE
337 --- regardless of what kind of lvalue WHOLE is. */
338 extern void set_value_component_location (struct value
*component
,
339 const struct value
*whole
);
341 /* While the following fields are per- VALUE .CONTENT .PIECE (i.e., a
342 single value might have multiple LVALs), this hacked interface is
343 limited to just the first PIECE. Expect further change. */
344 /* Type of value; either not an lval, or one of the various different
345 possible kinds of lval. */
346 extern enum lval_type
*deprecated_value_lval_hack (struct value
*);
347 #define VALUE_LVAL(val) (*deprecated_value_lval_hack (val))
349 /* Like VALUE_LVAL, except the parameter can be const. */
350 extern enum lval_type
value_lval_const (const struct value
*value
);
352 /* If lval == lval_memory, return the address in the inferior. If
353 lval == lval_register, return the byte offset into the registers
354 structure. Otherwise, return 0. The returned address
355 includes the offset, if any. */
356 extern CORE_ADDR
value_address (const struct value
*);
358 /* Like value_address, except the result does not include value's
360 extern CORE_ADDR
value_raw_address (struct value
*);
362 /* Set the address of a value. */
363 extern void set_value_address (struct value
*, CORE_ADDR
);
365 /* Pointer to internal variable. */
366 extern struct internalvar
**deprecated_value_internalvar_hack (struct value
*);
367 #define VALUE_INTERNALVAR(val) (*deprecated_value_internalvar_hack (val))
369 /* Frame register value is relative to. This will be described in the
370 lval enum above as "lval_register". */
371 extern struct frame_id
*deprecated_value_frame_id_hack (struct value
*);
372 #define VALUE_FRAME_ID(val) (*deprecated_value_frame_id_hack (val))
374 /* Register number if the value is from a register. */
375 extern short *deprecated_value_regnum_hack (struct value
*);
376 #define VALUE_REGNUM(val) (*deprecated_value_regnum_hack (val))
378 /* Return value after lval_funcs->coerce_ref (after check_typedef). Return
379 NULL if lval_funcs->coerce_ref is not applicable for whatever reason. */
381 extern struct value
*coerce_ref_if_computed (const struct value
*arg
);
383 /* Setup a new value type and enclosing value type for dereferenced value VALUE.
384 ENC_TYPE is the new enclosing type that should be set. ORIGINAL_TYPE and
385 ORIGINAL_VAL are the type and value of the original reference or pointer.
387 Note, that VALUE is modified by this function.
389 It is a common implementation for coerce_ref and value_ind. */
391 extern struct value
* readjust_indirect_value_type (struct value
*value
,
392 struct type
*enc_type
,
393 struct type
*original_type
,
394 struct value
*original_val
);
396 /* Convert a REF to the object referenced. */
398 extern struct value
*coerce_ref (struct value
*value
);
400 /* If ARG is an array, convert it to a pointer.
401 If ARG is a function, convert it to a function pointer.
403 References are dereferenced. */
405 extern struct value
*coerce_array (struct value
*value
);
407 /* Given a value, determine whether the bits starting at OFFSET and
408 extending for LENGTH bits are valid. This returns nonzero if all
409 bits in the given range are valid, zero if any bit is invalid. */
411 extern int value_bits_valid (const struct value
*value
,
412 int offset
, int length
);
414 /* Given a value, determine whether the bits starting at OFFSET and
415 extending for LENGTH bits are a synthetic pointer. */
417 extern int value_bits_synthetic_pointer (const struct value
*value
,
418 int offset
, int length
);
420 /* Given a value, determine whether the contents bytes starting at
421 OFFSET and extending for LENGTH bytes are available. This returns
422 nonzero if all bytes in the given range are available, zero if any
423 byte is unavailable. */
425 extern int value_bytes_available (const struct value
*value
,
426 int offset
, int length
);
428 /* Like value_bytes_available, but return false if any byte in the
429 whole object is unavailable. */
430 extern int value_entirely_available (struct value
*value
);
432 /* Mark VALUE's content bytes starting at OFFSET and extending for
433 LENGTH bytes as unavailable. */
435 extern void mark_value_bytes_unavailable (struct value
*value
,
436 int offset
, int length
);
438 /* Compare LENGTH bytes of VAL1's contents starting at OFFSET1 with
439 LENGTH bytes of VAL2's contents starting at OFFSET2.
441 Note that "contents" refers to the whole value's contents
442 (value_contents_all), without any embedded offset adjustment. For
443 example, to compare a complete object value with itself, including
444 its enclosing type chunk, you'd do:
446 int len = TYPE_LENGTH (check_typedef (value_enclosing_type (val)));
447 value_available_contents (val, 0, val, 0, len);
449 Returns true iff the set of available contents match. Unavailable
450 contents compare equal with unavailable contents, and different
451 with any available byte. For example, if 'x's represent an
452 unavailable byte, and 'V' and 'Z' represent different available
453 bytes, in a value with length 16:
456 contents: xxxxVVVVxxxxVVZZ
460 value_available_contents_eq(val, 0, val, 8, 6) => 1
461 value_available_contents_eq(val, 0, val, 4, 4) => 1
462 value_available_contents_eq(val, 0, val, 8, 8) => 0
463 value_available_contents_eq(val, 4, val, 12, 2) => 1
464 value_available_contents_eq(val, 4, val, 12, 4) => 0
465 value_available_contents_eq(val, 3, val, 4, 4) => 0
468 extern int value_available_contents_eq (const struct value
*val1
, int offset1
,
469 const struct value
*val2
, int offset2
,
472 /* Read LENGTH bytes of memory starting at MEMADDR into BUFFER, which
473 is (or will be copied to) VAL's contents buffer offset by
474 EMBEDDED_OFFSET (that is, to &VAL->contents[EMBEDDED_OFFSET]).
475 Marks value contents ranges as unavailable if the corresponding
476 memory is likewise unavailable. STACK indicates whether the memory
477 is known to be stack memory. */
479 extern void read_value_memory (struct value
*val
, int embedded_offset
,
480 int stack
, CORE_ADDR memaddr
,
481 gdb_byte
*buffer
, size_t length
);
483 /* Cast SCALAR_VALUE to the element type of VECTOR_TYPE, then replicate
484 into each element of a new vector value with VECTOR_TYPE. */
486 struct value
*value_vector_widen (struct value
*scalar_value
,
487 struct type
*vector_type
);
492 #include "gdbtypes.h"
493 #include "expression.h"
498 extern int print_address_demangle (const struct value_print_options
*,
499 struct gdbarch
*, CORE_ADDR
,
500 struct ui_file
*, int);
502 extern LONGEST
value_as_long (struct value
*val
);
503 extern DOUBLEST
value_as_double (struct value
*val
);
504 extern CORE_ADDR
value_as_address (struct value
*val
);
506 extern LONGEST
unpack_long (struct type
*type
, const gdb_byte
*valaddr
);
507 extern DOUBLEST
unpack_double (struct type
*type
, const gdb_byte
*valaddr
,
509 extern CORE_ADDR
unpack_pointer (struct type
*type
, const gdb_byte
*valaddr
);
511 extern int unpack_value_bits_as_long (struct type
*field_type
,
512 const gdb_byte
*valaddr
,
513 int embedded_offset
, int bitpos
,
515 const struct value
*original_value
,
518 extern LONGEST
unpack_field_as_long (struct type
*type
,
519 const gdb_byte
*valaddr
,
521 extern int unpack_value_field_as_long (struct type
*type
, const gdb_byte
*valaddr
,
522 int embedded_offset
, int fieldno
,
523 const struct value
*val
, LONGEST
*result
);
525 extern struct value
*value_field_bitfield (struct type
*type
, int fieldno
,
526 const gdb_byte
*valaddr
,
528 const struct value
*val
);
530 extern void pack_long (gdb_byte
*buf
, struct type
*type
, LONGEST num
);
532 extern struct value
*value_from_longest (struct type
*type
, LONGEST num
);
533 extern struct value
*value_from_ulongest (struct type
*type
, ULONGEST num
);
534 extern struct value
*value_from_pointer (struct type
*type
, CORE_ADDR addr
);
535 extern struct value
*value_from_double (struct type
*type
, DOUBLEST num
);
536 extern struct value
*value_from_decfloat (struct type
*type
,
537 const gdb_byte
*decbytes
);
538 extern struct value
*value_from_history_ref (char *, char **);
540 extern struct value
*value_at (struct type
*type
, CORE_ADDR addr
);
541 extern struct value
*value_at_lazy (struct type
*type
, CORE_ADDR addr
);
543 extern struct value
*value_from_contents_and_address (struct type
*,
546 extern struct value
*value_from_contents (struct type
*, const gdb_byte
*);
548 extern struct value
*default_value_from_register (struct type
*type
,
550 struct frame_info
*frame
);
552 extern void read_frame_register_value (struct value
*value
,
553 struct frame_info
*frame
);
555 extern struct value
*value_from_register (struct type
*type
, int regnum
,
556 struct frame_info
*frame
);
558 extern CORE_ADDR
address_from_register (struct type
*type
, int regnum
,
559 struct frame_info
*frame
);
561 extern struct value
*value_of_variable (struct symbol
*var
,
562 const struct block
*b
);
564 extern struct value
*address_of_variable (struct symbol
*var
,
565 const struct block
*b
);
567 extern struct value
*value_of_register (int regnum
, struct frame_info
*frame
);
569 struct value
*value_of_register_lazy (struct frame_info
*frame
, int regnum
);
571 extern int symbol_read_needs_frame (struct symbol
*);
573 extern struct value
*read_var_value (struct symbol
*var
,
574 struct frame_info
*frame
);
576 extern struct value
*default_read_var_value (struct symbol
*var
,
577 struct frame_info
*frame
);
579 extern struct value
*allocate_value (struct type
*type
);
580 extern struct value
*allocate_value_lazy (struct type
*type
);
581 extern void allocate_value_contents (struct value
*value
);
582 extern void value_contents_copy (struct value
*dst
, int dst_offset
,
583 struct value
*src
, int src_offset
,
585 extern void value_contents_copy_raw (struct value
*dst
, int dst_offset
,
586 struct value
*src
, int src_offset
,
589 extern struct value
*allocate_repeat_value (struct type
*type
, int count
);
591 extern struct value
*value_mark (void);
593 extern void value_free_to_mark (struct value
*mark
);
595 extern struct value
*value_cstring (char *ptr
, ssize_t len
,
596 struct type
*char_type
);
597 extern struct value
*value_string (char *ptr
, ssize_t len
,
598 struct type
*char_type
);
600 extern struct value
*value_array (int lowbound
, int highbound
,
601 struct value
**elemvec
);
603 extern struct value
*value_concat (struct value
*arg1
, struct value
*arg2
);
605 extern struct value
*value_binop (struct value
*arg1
, struct value
*arg2
,
608 extern struct value
*value_ptradd (struct value
*arg1
, LONGEST arg2
);
610 extern LONGEST
value_ptrdiff (struct value
*arg1
, struct value
*arg2
);
612 extern int value_must_coerce_to_target (struct value
*arg1
);
614 extern struct value
*value_coerce_to_target (struct value
*arg1
);
616 extern struct value
*value_coerce_array (struct value
*arg1
);
618 extern struct value
*value_coerce_function (struct value
*arg1
);
620 extern struct value
*value_ind (struct value
*arg1
);
622 extern struct value
*value_addr (struct value
*arg1
);
624 extern struct value
*value_ref (struct value
*arg1
);
626 extern struct value
*value_assign (struct value
*toval
,
627 struct value
*fromval
);
629 extern struct value
*value_pos (struct value
*arg1
);
631 extern struct value
*value_neg (struct value
*arg1
);
633 extern struct value
*value_complement (struct value
*arg1
);
635 extern struct value
*value_struct_elt (struct value
**argp
,
637 const char *name
, int *static_memfuncp
,
640 extern struct value
*value_aggregate_elt (struct type
*curtype
,
642 struct type
*expect_type
,
646 extern struct value
*value_static_field (struct type
*type
, int fieldno
);
648 enum oload_search_type
{ NON_METHOD
, METHOD
, BOTH
};
650 extern int find_overload_match (struct value
**args
, int nargs
,
652 enum oload_search_type method
,
653 struct value
**objp
, struct symbol
*fsym
,
654 struct value
**valp
, struct symbol
**symp
,
655 int *staticp
, const int no_adl
);
657 extern struct value
*value_field (struct value
*arg1
, int fieldno
);
659 extern struct value
*value_primitive_field (struct value
*arg1
, int offset
,
661 struct type
*arg_type
);
664 extern struct type
*value_rtti_indirect_type (struct value
*, int *, int *,
667 extern struct value
*value_full_object (struct value
*, struct type
*, int,
670 extern struct value
*value_cast_pointers (struct type
*, struct value
*, int);
672 extern struct value
*value_cast (struct type
*type
, struct value
*arg2
);
674 extern struct value
*value_reinterpret_cast (struct type
*type
,
677 extern struct value
*value_dynamic_cast (struct type
*type
, struct value
*arg
);
679 extern struct value
*value_zero (struct type
*type
, enum lval_type lv
);
681 extern struct value
*value_one (struct type
*type
);
683 extern struct value
*value_repeat (struct value
*arg1
, int count
);
685 extern struct value
*value_subscript (struct value
*array
, LONGEST index
);
687 extern struct value
*value_bitstring_subscript (struct type
*type
,
688 struct value
*bitstring
,
691 extern struct value
*register_value_being_returned (struct type
*valtype
,
692 struct regcache
*retbuf
);
694 extern int value_in (struct value
*element
, struct value
*set
);
696 extern int value_bit_index (struct type
*type
, const gdb_byte
*addr
,
699 extern enum return_value_convention
700 struct_return_convention (struct gdbarch
*gdbarch
, struct value
*function
,
701 struct type
*value_type
);
703 extern int using_struct_return (struct gdbarch
*gdbarch
,
704 struct value
*function
,
705 struct type
*value_type
);
707 extern struct value
*evaluate_expression (struct expression
*exp
);
709 extern struct value
*evaluate_type (struct expression
*exp
);
711 extern struct value
*evaluate_subexp (struct type
*expect_type
,
712 struct expression
*exp
,
713 int *pos
, enum noside noside
);
715 extern struct value
*evaluate_subexpression_type (struct expression
*exp
,
718 extern void fetch_subexp_value (struct expression
*exp
, int *pc
,
719 struct value
**valp
, struct value
**resultp
,
720 struct value
**val_chain
);
722 extern char *extract_field_op (struct expression
*exp
, int *subexp
);
724 extern struct value
*evaluate_subexp_with_coercion (struct expression
*,
727 extern struct value
*parse_and_eval (const char *exp
);
729 extern struct value
*parse_to_comma_and_eval (const char **expp
);
731 extern struct type
*parse_and_eval_type (char *p
, int length
);
733 extern CORE_ADDR
parse_and_eval_address (const char *exp
);
735 extern LONGEST
parse_and_eval_long (char *exp
);
737 extern void unop_promote (const struct language_defn
*language
,
738 struct gdbarch
*gdbarch
,
739 struct value
**arg1
);
741 extern void binop_promote (const struct language_defn
*language
,
742 struct gdbarch
*gdbarch
,
743 struct value
**arg1
, struct value
**arg2
);
745 extern struct value
*access_value_history (int num
);
747 extern struct value
*value_of_internalvar (struct gdbarch
*gdbarch
,
748 struct internalvar
*var
);
750 extern int get_internalvar_integer (struct internalvar
*var
, LONGEST
*l
);
752 extern void set_internalvar (struct internalvar
*var
, struct value
*val
);
754 extern void set_internalvar_integer (struct internalvar
*var
, LONGEST l
);
756 extern void set_internalvar_string (struct internalvar
*var
,
759 extern void clear_internalvar (struct internalvar
*var
);
761 extern void set_internalvar_component (struct internalvar
*var
,
763 int bitpos
, int bitsize
,
764 struct value
*newvalue
);
766 extern struct internalvar
*lookup_only_internalvar (const char *name
);
768 extern struct internalvar
*create_internalvar (const char *name
);
770 extern VEC (char_ptr
) *complete_internalvar (const char *name
);
772 /* An internalvar can be dynamically computed by supplying a vector of
773 function pointers to perform various operations. */
775 struct internalvar_funcs
777 /* Compute the value of the variable. The DATA argument passed to
778 the function is the same argument that was passed to
779 `create_internalvar_type_lazy'. */
781 struct value
*(*make_value
) (struct gdbarch
*arch
,
782 struct internalvar
*var
,
785 /* Update the agent expression EXPR with bytecode to compute the
786 value. VALUE is the agent value we are updating. The DATA
787 argument passed to this function is the same argument that was
788 passed to `create_internalvar_type_lazy'. If this pointer is
789 NULL, then the internalvar cannot be compiled to an agent
792 void (*compile_to_ax
) (struct internalvar
*var
,
793 struct agent_expr
*expr
,
794 struct axs_value
*value
,
797 /* If non-NULL, this is called to destroy DATA. The DATA argument
798 passed to this function is the same argument that was passed to
799 `create_internalvar_type_lazy'. */
801 void (*destroy
) (void *data
);
804 extern struct internalvar
*
805 create_internalvar_type_lazy (const char *name
,
806 const struct internalvar_funcs
*funcs
,
809 /* Compile an internal variable to an agent expression. VAR is the
810 variable to compile; EXPR and VALUE are the agent expression we are
811 updating. This will return 0 if there is no known way to compile
812 VAR, and 1 if VAR was successfully compiled. It may also throw an
813 exception on error. */
815 extern int compile_internalvar_to_ax (struct internalvar
*var
,
816 struct agent_expr
*expr
,
817 struct axs_value
*value
);
819 extern struct internalvar
*lookup_internalvar (const char *name
);
821 extern int value_equal (struct value
*arg1
, struct value
*arg2
);
823 extern int value_equal_contents (struct value
*arg1
, struct value
*arg2
);
825 extern int value_less (struct value
*arg1
, struct value
*arg2
);
827 extern int value_logical_not (struct value
*arg1
);
831 extern struct value
*value_of_this (const struct language_defn
*lang
);
833 extern struct value
*value_of_this_silent (const struct language_defn
*lang
);
835 extern struct value
*value_x_binop (struct value
*arg1
, struct value
*arg2
,
837 enum exp_opcode otherop
,
840 extern struct value
*value_x_unop (struct value
*arg1
, enum exp_opcode op
,
843 extern struct value
*value_fn_field (struct value
**arg1p
, struct fn_field
*f
,
844 int j
, struct type
*type
, int offset
);
846 extern int binop_types_user_defined_p (enum exp_opcode op
,
850 extern int binop_user_defined_p (enum exp_opcode op
, struct value
*arg1
,
853 extern int unop_user_defined_p (enum exp_opcode op
, struct value
*arg1
);
855 extern int destructor_name_p (const char *name
, struct type
*type
);
857 extern void value_incref (struct value
*val
);
859 extern void value_free (struct value
*val
);
861 extern void free_all_values (void);
863 extern void free_value_chain (struct value
*v
);
865 extern void release_value (struct value
*val
);
867 extern void release_value_or_incref (struct value
*val
);
869 extern int record_latest_value (struct value
*val
);
871 extern void modify_field (struct type
*type
, gdb_byte
*addr
,
872 LONGEST fieldval
, int bitpos
, int bitsize
);
874 extern void type_print (struct type
*type
, const char *varstring
,
875 struct ui_file
*stream
, int show
);
877 extern char *type_to_string (struct type
*type
);
879 extern gdb_byte
*baseclass_addr (struct type
*type
, int index
,
881 struct value
**valuep
, int *errp
);
883 extern void print_longest (struct ui_file
*stream
, int format
,
884 int use_local
, LONGEST val
);
886 extern void print_floating (const gdb_byte
*valaddr
, struct type
*type
,
887 struct ui_file
*stream
);
889 extern void print_decimal_floating (const gdb_byte
*valaddr
, struct type
*type
,
890 struct ui_file
*stream
);
892 extern void value_print (struct value
*val
, struct ui_file
*stream
,
893 const struct value_print_options
*options
);
895 extern void value_print_array_elements (struct value
*val
,
896 struct ui_file
*stream
, int format
,
897 enum val_prettyprint pretty
);
899 extern struct value
*value_release_to_mark (struct value
*mark
);
901 extern void val_print (struct type
*type
, const gdb_byte
*valaddr
,
902 int embedded_offset
, CORE_ADDR address
,
903 struct ui_file
*stream
, int recurse
,
904 const struct value
*val
,
905 const struct value_print_options
*options
,
906 const struct language_defn
*language
);
908 extern void common_val_print (struct value
*val
,
909 struct ui_file
*stream
, int recurse
,
910 const struct value_print_options
*options
,
911 const struct language_defn
*language
);
913 extern int val_print_string (struct type
*elttype
, const char *encoding
,
914 CORE_ADDR addr
, int len
,
915 struct ui_file
*stream
,
916 const struct value_print_options
*options
);
918 extern void print_variable_and_value (const char *name
,
920 struct frame_info
*frame
,
921 struct ui_file
*stream
,
924 extern void typedef_print (struct type
*type
, struct symbol
*news
,
925 struct ui_file
*stream
);
927 extern char *internalvar_name (struct internalvar
*var
);
929 extern void preserve_values (struct objfile
*);
933 extern struct value
*value_copy (struct value
*);
935 extern struct value
*value_non_lval (struct value
*);
937 extern void preserve_one_value (struct value
*, struct objfile
*, htab_t
);
941 extern struct value
*varying_to_slice (struct value
*);
943 extern struct value
*value_slice (struct value
*, int, int);
945 extern struct value
*value_literal_complex (struct value
*, struct value
*,
948 extern struct value
*find_function_in_inferior (const char *,
951 extern struct value
*value_allocate_space_in_inferior (int);
953 extern struct value
*value_subscripted_rvalue (struct value
*array
,
954 LONGEST index
, int lowerbound
);
956 /* User function handler. */
958 typedef struct value
*(*internal_function_fn
) (struct gdbarch
*gdbarch
,
959 const struct language_defn
*language
,
962 struct value
**argv
);
964 void add_internal_function (const char *name
, const char *doc
,
965 internal_function_fn handler
,
968 struct value
*call_internal_function (struct gdbarch
*gdbarch
,
969 const struct language_defn
*language
,
970 struct value
*function
,
971 int argc
, struct value
**argv
);
973 char *value_internal_function_name (struct value
*);
975 #endif /* !defined (VALUE_H) */