1 /* Definitions for values of C expressions, for GDB.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
5 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #if !defined (VALUE_H)
26 #include "frame.h" /* For struct frame_id. */
35 struct value_print_options
;
37 /* The structure which defines the type of a value. It should never
38 be possible for a program lval value to survive over a call to the
39 inferior (i.e. to be put into the history list or an internal
44 /* Values are stored in a chain, so that they can be deleted easily
45 over calls to the inferior. Values assigned to internal variables,
46 put into the value history or exposed to Python are taken off this
49 struct value
*value_next (struct value
*);
51 /* Type of the value. */
53 extern struct type
*value_type (const struct value
*);
55 /* This is being used to change the type of an existing value, that
56 code should instead be creating a new value with the changed type
57 (but possibly shared content). */
59 extern void deprecated_set_value_type (struct value
*value
,
62 /* Only used for bitfields; number of bits contained in them. */
64 extern int value_bitsize (const struct value
*);
65 extern void set_value_bitsize (struct value
*, int bit
);
67 /* Only used for bitfields; position of start of field. For
68 gdbarch_bits_big_endian=0 targets, it is the position of the LSB. For
69 gdbarch_bits_big_endian=1 targets, it is the position of the MSB. */
71 extern int value_bitpos (const struct value
*);
72 extern void set_value_bitpos (struct value
*, int bit
);
74 /* Only used for bitfields; the containing value. This allows a
75 single read from the target when displaying multiple
78 struct value
*value_parent (struct value
*);
80 /* Describes offset of a value within lval of a structure in bytes.
81 If lval == lval_memory, this is an offset to the address. If lval
82 == lval_register, this is a further offset from location.address
83 within the registers structure. Note also the member
84 embedded_offset below. */
86 extern int value_offset (const struct value
*);
87 extern void set_value_offset (struct value
*, int offset
);
89 /* The comment from "struct value" reads: ``Is it modifiable? Only
90 relevant if lval != not_lval.''. Shouldn't the value instead be
91 not_lval and be done with it? */
93 extern int deprecated_value_modifiable (struct value
*value
);
94 extern void deprecated_set_value_modifiable (struct value
*value
,
97 /* If a value represents a C++ object, then the `type' field gives the
98 object's compile-time type. If the object actually belongs to some
99 class derived from `type', perhaps with other base classes and
100 additional members, then `type' is just a subobject of the real
101 thing, and the full object is probably larger than `type' would
104 If `type' is a dynamic class (i.e. one with a vtable), then GDB can
105 actually determine the object's run-time type by looking at the
106 run-time type information in the vtable. When this information is
107 available, we may elect to read in the entire object, for several
110 - When printing the value, the user would probably rather see the
111 full object, not just the limited portion apparent from the
114 - If `type' has virtual base classes, then even printing `type'
115 alone may require reaching outside the `type' portion of the
116 object to wherever the virtual base class has been stored.
118 When we store the entire object, `enclosing_type' is the run-time
119 type -- the complete object -- and `embedded_offset' is the offset
120 of `type' within that larger type, in bytes. The value_contents()
121 macro takes `embedded_offset' into account, so most GDB code
122 continues to see the `type' portion of the value, just as the
125 If `type' is a pointer to an object, then `enclosing_type' is a
126 pointer to the object's run-time type, and `pointed_to_offset' is
127 the offset in bytes from the full object to the pointed-to object
128 -- that is, the value `embedded_offset' would have if we followed
129 the pointer and fetched the complete object. (I don't really see
130 the point. Why not just determine the run-time type when you
131 indirect, and avoid the special case? The contents don't matter
132 until you indirect anyway.)
134 If we're not doing anything fancy, `enclosing_type' is equal to
135 `type', and `embedded_offset' is zero, so everything works
138 extern struct type
*value_enclosing_type (struct value
*);
139 extern void set_value_enclosing_type (struct value
*val
,
140 struct type
*new_type
);
142 extern int value_pointed_to_offset (struct value
*value
);
143 extern void set_value_pointed_to_offset (struct value
*value
, int val
);
144 extern int value_embedded_offset (struct value
*value
);
145 extern void set_value_embedded_offset (struct value
*value
, int val
);
147 /* For lval_computed values, this structure holds functions used to
148 retrieve and set the value (or portions of the value).
150 For each function, 'V' is the 'this' pointer: an lval_funcs
151 function F may always assume that the V it receives is an
152 lval_computed value, and has F in the appropriate slot of its
153 lval_funcs structure. */
157 /* Fill in VALUE's contents. This is used to "un-lazy" values. If
158 a problem arises in obtaining VALUE's bits, this function should
159 call 'error'. If it is NULL value_fetch_lazy on "un-lazy"
160 non-optimized-out value is an internal error. */
161 void (*read
) (struct value
*v
);
163 /* Handle an assignment TOVAL = FROMVAL by writing the value of
164 FROMVAL to TOVAL's location. The contents of TOVAL have not yet
165 been updated. If a problem arises in doing so, this function
166 should call 'error'. If it is NULL such TOVAL assignment is an error as
167 TOVAL is not considered as an lvalue. */
168 void (*write
) (struct value
*toval
, struct value
*fromval
);
170 /* Check the validity of some bits in VALUE. This should return 1
171 if all the bits starting at OFFSET and extending for LENGTH bits
172 are valid, or 0 if any bit is invalid. */
173 int (*check_validity
) (const struct value
*value
, int offset
, int length
);
175 /* Return 1 if any bit in VALUE is valid, 0 if they are all invalid. */
176 int (*check_any_valid
) (const struct value
*value
);
178 /* If non-NULL, this is used to implement pointer indirection for
179 this value. This method may return NULL, in which case value_ind
180 will fall back to ordinary indirection. */
181 struct value
*(*indirect
) (struct value
*value
);
183 /* If non-NULL, this is used to implement reference resolving for
184 this value. This method may return NULL, in which case coerce_ref
185 will fall back to ordinary references resolving. */
186 struct value
*(*coerce_ref
) (const struct value
*value
);
188 /* If non-NULL, this is used to determine whether the indicated bits
189 of VALUE are a synthetic pointer. */
190 int (*check_synthetic_pointer
) (const struct value
*value
,
191 int offset
, int length
);
193 /* Return a duplicate of VALUE's closure, for use in a new value.
194 This may simply return the same closure, if VALUE's is
195 reference-counted or statically allocated.
197 This may be NULL, in which case VALUE's closure is re-used in the
199 void *(*copy_closure
) (const struct value
*v
);
201 /* Drop VALUE's reference to its closure. Maybe this frees the
202 closure; maybe this decrements a reference count; maybe the
203 closure is statically allocated and this does nothing.
205 This may be NULL, in which case no action is taken to free
207 void (*free_closure
) (struct value
*v
);
210 /* Create a computed lvalue, with type TYPE, function pointers FUNCS,
211 and closure CLOSURE. */
213 extern struct value
*allocate_computed_value (struct type
*type
,
214 const struct lval_funcs
*funcs
,
217 extern struct value
*allocate_optimized_out_value (struct type
*type
);
219 /* If VALUE is lval_computed, return its lval_funcs structure. */
221 extern const struct lval_funcs
*value_computed_funcs (const struct value
*);
223 /* If VALUE is lval_computed, return its closure. The meaning of the
224 returned value depends on the functions VALUE uses. */
226 extern void *value_computed_closure (const struct value
*value
);
228 /* If zero, contents of this value are in the contents field. If
229 nonzero, contents are in inferior. If the lval field is lval_memory,
230 the contents are in inferior memory at location.address plus offset.
231 The lval field may also be lval_register.
233 WARNING: This field is used by the code which handles watchpoints
234 (see breakpoint.c) to decide whether a particular value can be
235 watched by hardware watchpoints. If the lazy flag is set for some
236 member of a value chain, it is assumed that this member of the
237 chain doesn't need to be watched as part of watching the value
238 itself. This is how GDB avoids watching the entire struct or array
239 when the user wants to watch a single struct member or array
240 element. If you ever change the way lazy flag is set and reset, be
241 sure to consider this use as well! */
243 extern int value_lazy (struct value
*);
244 extern void set_value_lazy (struct value
*value
, int val
);
246 extern int value_stack (struct value
*);
247 extern void set_value_stack (struct value
*value
, int val
);
249 /* value_contents() and value_contents_raw() both return the address
250 of the gdb buffer used to hold a copy of the contents of the lval.
251 value_contents() is used when the contents of the buffer are needed
252 -- it uses value_fetch_lazy() to load the buffer from the process
253 being debugged if it hasn't already been loaded
254 (value_contents_writeable() is used when a writeable but fetched
255 buffer is required).. value_contents_raw() is used when data is
256 being stored into the buffer, or when it is certain that the
257 contents of the buffer are valid.
259 Note: The contents pointer is adjusted by the offset required to
260 get to the real subobject, if the value happens to represent
261 something embedded in a larger run-time object. */
263 extern gdb_byte
*value_contents_raw (struct value
*);
265 /* Actual contents of the value. For use of this value; setting it
266 uses the stuff above. Not valid if lazy is nonzero. Target
267 byte-order. We force it to be aligned properly for any possible
268 value. Note that a value therefore extends beyond what is
271 extern const gdb_byte
*value_contents (struct value
*);
272 extern gdb_byte
*value_contents_writeable (struct value
*);
274 /* The ALL variants of the above two macros do not adjust the returned
275 pointer by the embedded_offset value. */
277 extern gdb_byte
*value_contents_all_raw (struct value
*);
278 extern const gdb_byte
*value_contents_all (struct value
*);
280 /* Like value_contents_all, but does not require that the returned
281 bits be valid. This should only be used in situations where you
282 plan to check the validity manually. */
283 extern const gdb_byte
*value_contents_for_printing (struct value
*value
);
285 /* Like value_contents_for_printing, but accepts a constant value
286 pointer. Unlike value_contents_for_printing however, the pointed
287 value must _not_ be lazy. */
288 extern const gdb_byte
*
289 value_contents_for_printing_const (const struct value
*value
);
291 extern int value_fetch_lazy (struct value
*val
);
292 extern int value_contents_equal (struct value
*val1
, struct value
*val2
);
294 /* If nonzero, this is the value of a variable which does not actually
295 exist in the program. */
296 extern int value_optimized_out (struct value
*value
);
297 extern void set_value_optimized_out (struct value
*value
, int val
);
299 /* Like value_optimized_out, but return false if any bit in the object
301 extern int value_entirely_optimized_out (const struct value
*value
);
303 /* Set or return field indicating whether a variable is initialized or
304 not, based on debugging information supplied by the compiler.
305 1 = initialized; 0 = uninitialized. */
306 extern int value_initialized (struct value
*);
307 extern void set_value_initialized (struct value
*, int);
309 /* Set COMPONENT's location as appropriate for a component of WHOLE
310 --- regardless of what kind of lvalue WHOLE is. */
311 extern void set_value_component_location (struct value
*component
,
312 const struct value
*whole
);
314 /* While the following fields are per- VALUE .CONTENT .PIECE (i.e., a
315 single value might have multiple LVALs), this hacked interface is
316 limited to just the first PIECE. Expect further change. */
317 /* Type of value; either not an lval, or one of the various different
318 possible kinds of lval. */
319 extern enum lval_type
*deprecated_value_lval_hack (struct value
*);
320 #define VALUE_LVAL(val) (*deprecated_value_lval_hack (val))
322 /* Like VALUE_LVAL, except the parameter can be const. */
323 extern enum lval_type
value_lval_const (const struct value
*value
);
325 /* If lval == lval_memory, return the address in the inferior. If
326 lval == lval_register, return the byte offset into the registers
327 structure. Otherwise, return 0. The returned address
328 includes the offset, if any. */
329 extern CORE_ADDR
value_address (const struct value
*);
331 /* Like value_address, except the result does not include value's
333 extern CORE_ADDR
value_raw_address (struct value
*);
335 /* Set the address of a value. */
336 extern void set_value_address (struct value
*, CORE_ADDR
);
338 /* Pointer to internal variable. */
339 extern struct internalvar
**deprecated_value_internalvar_hack (struct value
*);
340 #define VALUE_INTERNALVAR(val) (*deprecated_value_internalvar_hack (val))
342 /* Frame register value is relative to. This will be described in the
343 lval enum above as "lval_register". */
344 extern struct frame_id
*deprecated_value_frame_id_hack (struct value
*);
345 #define VALUE_FRAME_ID(val) (*deprecated_value_frame_id_hack (val))
347 /* Register number if the value is from a register. */
348 extern short *deprecated_value_regnum_hack (struct value
*);
349 #define VALUE_REGNUM(val) (*deprecated_value_regnum_hack (val))
351 /* Return value after lval_funcs->coerce_ref (after check_typedef). Return
352 NULL if lval_funcs->coerce_ref is not applicable for whatever reason. */
354 extern struct value
*coerce_ref_if_computed (const struct value
*arg
);
356 /* Convert a REF to the object referenced. */
358 extern struct value
*coerce_ref (struct value
*value
);
360 /* If ARG is an array, convert it to a pointer.
361 If ARG is a function, convert it to a function pointer.
363 References are dereferenced. */
365 extern struct value
*coerce_array (struct value
*value
);
367 /* Given a value, determine whether the bits starting at OFFSET and
368 extending for LENGTH bits are valid. This returns nonzero if all
369 bits in the given range are valid, zero if any bit is invalid. */
371 extern int value_bits_valid (const struct value
*value
,
372 int offset
, int length
);
374 /* Given a value, determine whether the bits starting at OFFSET and
375 extending for LENGTH bits are a synthetic pointer. */
377 extern int value_bits_synthetic_pointer (const struct value
*value
,
378 int offset
, int length
);
380 /* Given a value, determine whether the contents bytes starting at
381 OFFSET and extending for LENGTH bytes are available. This returns
382 nonzero if all bytes in the given range are available, zero if any
383 byte is unavailable. */
385 extern int value_bytes_available (const struct value
*value
,
386 int offset
, int length
);
388 /* Like value_bytes_available, but return false if any byte in the
389 whole object is unavailable. */
390 extern int value_entirely_available (struct value
*value
);
392 /* Mark VALUE's content bytes starting at OFFSET and extending for
393 LENGTH bytes as unavailable. */
395 extern void mark_value_bytes_unavailable (struct value
*value
,
396 int offset
, int length
);
398 /* Compare LENGTH bytes of VAL1's contents starting at OFFSET1 with
399 LENGTH bytes of VAL2's contents starting at OFFSET2.
401 Note that "contents" refers to the whole value's contents
402 (value_contents_all), without any embedded offset adjustment. For
403 example, to compare a complete object value with itself, including
404 its enclosing type chunk, you'd do:
406 int len = TYPE_LENGTH (check_typedef (value_enclosing_type (val)));
407 value_available_contents (val, 0, val, 0, len);
409 Returns true iff the set of available contents match. Unavailable
410 contents compare equal with unavailable contents, and different
411 with any available byte. For example, if 'x's represent an
412 unavailable byte, and 'V' and 'Z' represent different available
413 bytes, in a value with length 16:
416 contents: xxxxVVVVxxxxVVZZ
420 value_available_contents_eq(val, 0, val, 8, 6) => 1
421 value_available_contents_eq(val, 0, val, 4, 4) => 1
422 value_available_contents_eq(val, 0, val, 8, 8) => 0
423 value_available_contents_eq(val, 4, val, 12, 2) => 1
424 value_available_contents_eq(val, 4, val, 12, 4) => 0
425 value_available_contents_eq(val, 3, val, 4, 4) => 0
428 extern int value_available_contents_eq (const struct value
*val1
, int offset1
,
429 const struct value
*val2
, int offset2
,
432 /* Read LENGTH bytes of memory starting at MEMADDR into BUFFER, which
433 is (or will be copied to) VAL's contents buffer offset by
434 EMBEDDED_OFFSET (that is, to &VAL->contents[EMBEDDED_OFFSET]).
435 Marks value contents ranges as unavailable if the corresponding
436 memory is likewise unavailable. STACK indicates whether the memory
437 is known to be stack memory. */
439 extern void read_value_memory (struct value
*val
, int embedded_offset
,
440 int stack
, CORE_ADDR memaddr
,
441 gdb_byte
*buffer
, size_t length
);
446 #include "gdbtypes.h"
447 #include "expression.h"
452 extern void print_address_demangle (struct gdbarch
*, CORE_ADDR
,
453 struct ui_file
*, int);
455 extern LONGEST
value_as_long (struct value
*val
);
456 extern DOUBLEST
value_as_double (struct value
*val
);
457 extern CORE_ADDR
value_as_address (struct value
*val
);
459 extern LONGEST
unpack_long (struct type
*type
, const gdb_byte
*valaddr
);
460 extern DOUBLEST
unpack_double (struct type
*type
, const gdb_byte
*valaddr
,
462 extern CORE_ADDR
unpack_pointer (struct type
*type
, const gdb_byte
*valaddr
);
464 extern int unpack_value_bits_as_long (struct type
*field_type
,
465 const gdb_byte
*valaddr
,
466 int embedded_offset
, int bitpos
,
468 const struct value
*original_value
,
471 extern LONGEST
unpack_field_as_long (struct type
*type
,
472 const gdb_byte
*valaddr
,
474 extern int unpack_value_field_as_long (struct type
*type
, const gdb_byte
*valaddr
,
475 int embedded_offset
, int fieldno
,
476 const struct value
*val
, LONGEST
*result
);
478 extern struct value
*value_field_bitfield (struct type
*type
, int fieldno
,
479 const gdb_byte
*valaddr
,
481 const struct value
*val
);
483 extern void pack_long (gdb_byte
*buf
, struct type
*type
, LONGEST num
);
485 extern struct value
*value_from_longest (struct type
*type
, LONGEST num
);
486 extern struct value
*value_from_ulongest (struct type
*type
, ULONGEST num
);
487 extern struct value
*value_from_pointer (struct type
*type
, CORE_ADDR addr
);
488 extern struct value
*value_from_double (struct type
*type
, DOUBLEST num
);
489 extern struct value
*value_from_decfloat (struct type
*type
,
490 const gdb_byte
*decbytes
);
491 extern struct value
*value_from_history_ref (char *, char **);
493 extern struct value
*value_at (struct type
*type
, CORE_ADDR addr
);
494 extern struct value
*value_at_lazy (struct type
*type
, CORE_ADDR addr
);
496 extern struct value
*value_from_contents_and_address (struct type
*,
499 extern struct value
*value_from_contents (struct type
*, const gdb_byte
*);
501 extern struct value
*default_value_from_register (struct type
*type
,
503 struct frame_info
*frame
);
505 extern void read_frame_register_value (struct value
*value
,
506 struct frame_info
*frame
);
508 extern struct value
*value_from_register (struct type
*type
, int regnum
,
509 struct frame_info
*frame
);
511 extern CORE_ADDR
address_from_register (struct type
*type
, int regnum
,
512 struct frame_info
*frame
);
514 extern struct value
*value_of_variable (struct symbol
*var
,
515 const struct block
*b
);
517 extern struct value
*address_of_variable (struct symbol
*var
, struct block
*b
);
519 extern struct value
*value_of_register (int regnum
, struct frame_info
*frame
);
521 struct value
*value_of_register_lazy (struct frame_info
*frame
, int regnum
);
523 extern int symbol_read_needs_frame (struct symbol
*);
525 extern struct value
*read_var_value (struct symbol
*var
,
526 struct frame_info
*frame
);
528 extern struct value
*allocate_value (struct type
*type
);
529 extern struct value
*allocate_value_lazy (struct type
*type
);
530 extern void allocate_value_contents (struct value
*value
);
531 extern void value_contents_copy (struct value
*dst
, int dst_offset
,
532 struct value
*src
, int src_offset
,
534 extern void value_contents_copy_raw (struct value
*dst
, int dst_offset
,
535 struct value
*src
, int src_offset
,
538 extern struct value
*allocate_repeat_value (struct type
*type
, int count
);
540 extern struct value
*value_mark (void);
542 extern void value_free_to_mark (struct value
*mark
);
544 extern struct value
*value_cstring (char *ptr
, int len
,
545 struct type
*char_type
);
546 extern struct value
*value_string (char *ptr
, int len
,
547 struct type
*char_type
);
548 extern struct value
*value_bitstring (char *ptr
, int len
,
549 struct type
*index_type
);
551 extern struct value
*value_array (int lowbound
, int highbound
,
552 struct value
**elemvec
);
554 extern struct value
*value_concat (struct value
*arg1
, struct value
*arg2
);
556 extern struct value
*value_binop (struct value
*arg1
, struct value
*arg2
,
559 extern struct value
*value_ptradd (struct value
*arg1
, LONGEST arg2
);
561 extern LONGEST
value_ptrdiff (struct value
*arg1
, struct value
*arg2
);
563 extern int value_must_coerce_to_target (struct value
*arg1
);
565 extern struct value
*value_coerce_to_target (struct value
*arg1
);
567 extern struct value
*value_coerce_array (struct value
*arg1
);
569 extern struct value
*value_coerce_function (struct value
*arg1
);
571 extern struct value
*value_ind (struct value
*arg1
);
573 extern struct value
*value_addr (struct value
*arg1
);
575 extern struct value
*value_ref (struct value
*arg1
);
577 extern struct value
*value_assign (struct value
*toval
,
578 struct value
*fromval
);
580 extern struct value
*value_pos (struct value
*arg1
);
582 extern struct value
*value_neg (struct value
*arg1
);
584 extern struct value
*value_complement (struct value
*arg1
);
586 extern struct value
*value_struct_elt (struct value
**argp
,
588 const char *name
, int *static_memfuncp
,
591 extern struct value
*value_aggregate_elt (struct type
*curtype
,
593 struct type
*expect_type
,
597 extern struct value
*value_static_field (struct type
*type
, int fieldno
);
599 extern struct fn_field
*value_find_oload_method_list (struct value
**,
602 struct type
**, int *);
604 enum oload_search_type
{ NON_METHOD
, METHOD
, BOTH
};
606 extern int find_overload_match (struct value
**args
, int nargs
,
608 enum oload_search_type method
, int lax
,
609 struct value
**objp
, struct symbol
*fsym
,
610 struct value
**valp
, struct symbol
**symp
,
611 int *staticp
, const int no_adl
);
613 extern struct value
*value_field (struct value
*arg1
, int fieldno
);
615 extern struct value
*value_primitive_field (struct value
*arg1
, int offset
,
617 struct type
*arg_type
);
620 extern struct type
*value_rtti_target_type (struct value
*, int *, int *,
623 extern struct value
*value_full_object (struct value
*, struct type
*, int,
626 extern struct value
*value_cast_pointers (struct type
*, struct value
*);
628 extern struct value
*value_cast (struct type
*type
, struct value
*arg2
);
630 extern struct value
*value_reinterpret_cast (struct type
*type
,
633 extern struct value
*value_dynamic_cast (struct type
*type
, struct value
*arg
);
635 extern struct value
*value_zero (struct type
*type
, enum lval_type lv
);
637 extern struct value
*value_one (struct type
*type
);
639 extern struct value
*value_repeat (struct value
*arg1
, int count
);
641 extern struct value
*value_subscript (struct value
*array
, LONGEST index
);
643 extern struct value
*value_bitstring_subscript (struct type
*type
,
644 struct value
*bitstring
,
647 extern struct value
*register_value_being_returned (struct type
*valtype
,
648 struct regcache
*retbuf
);
650 extern int value_in (struct value
*element
, struct value
*set
);
652 extern int value_bit_index (struct type
*type
, const gdb_byte
*addr
,
655 extern int using_struct_return (struct gdbarch
*gdbarch
,
656 struct type
*func_type
,
657 struct type
*value_type
);
659 extern struct value
*evaluate_expression (struct expression
*exp
);
661 extern struct value
*evaluate_type (struct expression
*exp
);
663 extern struct value
*evaluate_subexp (struct type
*expect_type
,
664 struct expression
*exp
,
665 int *pos
, enum noside noside
);
667 extern struct value
*evaluate_subexpression_type (struct expression
*exp
,
670 extern void fetch_subexp_value (struct expression
*exp
, int *pc
,
671 struct value
**valp
, struct value
**resultp
,
672 struct value
**val_chain
);
674 extern char *extract_field_op (struct expression
*exp
, int *subexp
);
676 extern struct value
*evaluate_subexp_with_coercion (struct expression
*,
679 extern struct value
*parse_and_eval (char *exp
);
681 extern struct value
*parse_to_comma_and_eval (char **expp
);
683 extern struct type
*parse_and_eval_type (char *p
, int length
);
685 extern CORE_ADDR
parse_and_eval_address (char *exp
);
687 extern LONGEST
parse_and_eval_long (char *exp
);
689 extern void unop_promote (const struct language_defn
*language
,
690 struct gdbarch
*gdbarch
,
691 struct value
**arg1
);
693 extern void binop_promote (const struct language_defn
*language
,
694 struct gdbarch
*gdbarch
,
695 struct value
**arg1
, struct value
**arg2
);
697 extern struct value
*access_value_history (int num
);
699 extern struct value
*value_of_internalvar (struct gdbarch
*gdbarch
,
700 struct internalvar
*var
);
702 extern int get_internalvar_integer (struct internalvar
*var
, LONGEST
*l
);
704 extern void set_internalvar (struct internalvar
*var
, struct value
*val
);
706 extern void set_internalvar_integer (struct internalvar
*var
, LONGEST l
);
708 extern void set_internalvar_string (struct internalvar
*var
,
711 extern void clear_internalvar (struct internalvar
*var
);
713 extern void set_internalvar_component (struct internalvar
*var
,
715 int bitpos
, int bitsize
,
716 struct value
*newvalue
);
718 extern struct internalvar
*lookup_only_internalvar (const char *name
);
720 extern struct internalvar
*create_internalvar (const char *name
);
722 typedef struct value
* (*internalvar_make_value
) (struct gdbarch
*,
723 struct internalvar
*);
724 extern struct internalvar
*
725 create_internalvar_type_lazy (char *name
, internalvar_make_value fun
);
727 extern struct internalvar
*lookup_internalvar (const char *name
);
729 extern int value_equal (struct value
*arg1
, struct value
*arg2
);
731 extern int value_equal_contents (struct value
*arg1
, struct value
*arg2
);
733 extern int value_less (struct value
*arg1
, struct value
*arg2
);
735 extern int value_logical_not (struct value
*arg1
);
739 extern struct value
*value_of_this (const struct language_defn
*lang
);
741 extern struct value
*value_of_this_silent (const struct language_defn
*lang
);
743 extern struct value
*value_x_binop (struct value
*arg1
, struct value
*arg2
,
745 enum exp_opcode otherop
,
748 extern struct value
*value_x_unop (struct value
*arg1
, enum exp_opcode op
,
751 extern struct value
*value_fn_field (struct value
**arg1p
, struct fn_field
*f
,
752 int j
, struct type
*type
, int offset
);
754 extern int binop_types_user_defined_p (enum exp_opcode op
,
758 extern int binop_user_defined_p (enum exp_opcode op
, struct value
*arg1
,
761 extern int unop_user_defined_p (enum exp_opcode op
, struct value
*arg1
);
763 extern int destructor_name_p (const char *name
, struct type
*type
);
765 extern void value_incref (struct value
*val
);
767 extern void value_free (struct value
*val
);
769 extern void free_all_values (void);
771 extern void free_value_chain (struct value
*v
);
773 extern void release_value (struct value
*val
);
775 extern int record_latest_value (struct value
*val
);
777 extern void modify_field (struct type
*type
, gdb_byte
*addr
,
778 LONGEST fieldval
, int bitpos
, int bitsize
);
780 extern void type_print (struct type
*type
, char *varstring
,
781 struct ui_file
*stream
, int show
);
783 extern char *type_to_string (struct type
*type
);
785 extern gdb_byte
*baseclass_addr (struct type
*type
, int index
,
787 struct value
**valuep
, int *errp
);
789 extern void print_longest (struct ui_file
*stream
, int format
,
790 int use_local
, LONGEST val
);
792 extern void print_floating (const gdb_byte
*valaddr
, struct type
*type
,
793 struct ui_file
*stream
);
795 extern void print_decimal_floating (const gdb_byte
*valaddr
, struct type
*type
,
796 struct ui_file
*stream
);
798 extern int value_print (struct value
*val
, struct ui_file
*stream
,
799 const struct value_print_options
*options
);
801 extern void value_print_array_elements (struct value
*val
,
802 struct ui_file
*stream
, int format
,
803 enum val_prettyprint pretty
);
805 extern struct value
*value_release_to_mark (struct value
*mark
);
807 extern int val_print (struct type
*type
, const gdb_byte
*valaddr
,
808 int embedded_offset
, CORE_ADDR address
,
809 struct ui_file
*stream
, int recurse
,
810 const struct value
*val
,
811 const struct value_print_options
*options
,
812 const struct language_defn
*language
);
814 extern int common_val_print (struct value
*val
,
815 struct ui_file
*stream
, int recurse
,
816 const struct value_print_options
*options
,
817 const struct language_defn
*language
);
819 extern int val_print_string (struct type
*elttype
, const char *encoding
,
820 CORE_ADDR addr
, int len
,
821 struct ui_file
*stream
,
822 const struct value_print_options
*options
);
824 extern void print_variable_and_value (const char *name
,
826 struct frame_info
*frame
,
827 struct ui_file
*stream
,
830 extern int check_field (struct type
*, const char *);
832 extern void typedef_print (struct type
*type
, struct symbol
*news
,
833 struct ui_file
*stream
);
835 extern char *internalvar_name (struct internalvar
*var
);
837 extern void preserve_values (struct objfile
*);
841 extern struct value
*value_copy (struct value
*);
843 extern struct value
*value_non_lval (struct value
*);
845 extern void preserve_one_value (struct value
*, struct objfile
*, htab_t
);
849 extern struct value
*varying_to_slice (struct value
*);
851 extern struct value
*value_slice (struct value
*, int, int);
853 extern struct value
*value_literal_complex (struct value
*, struct value
*,
856 extern struct value
*find_function_in_inferior (const char *,
859 extern struct value
*value_allocate_space_in_inferior (int);
861 extern struct value
*value_subscripted_rvalue (struct value
*array
,
862 LONGEST index
, int lowerbound
);
864 /* User function handler. */
866 typedef struct value
*(*internal_function_fn
) (struct gdbarch
*gdbarch
,
867 const struct language_defn
*language
,
870 struct value
**argv
);
872 void add_internal_function (const char *name
, const char *doc
,
873 internal_function_fn handler
,
876 struct value
*call_internal_function (struct gdbarch
*gdbarch
,
877 const struct language_defn
*language
,
878 struct value
*function
,
879 int argc
, struct value
**argv
);
881 char *value_internal_function_name (struct value
*);
883 #endif /* !defined (VALUE_H) */