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 /* Throw an error complaining that the value has been optimized
279 extern void error_value_optimized_out (void);
281 /* value_contents() and value_contents_raw() both return the address
282 of the gdb buffer used to hold a copy of the contents of the lval.
283 value_contents() is used when the contents of the buffer are needed
284 -- it uses value_fetch_lazy() to load the buffer from the process
285 being debugged if it hasn't already been loaded
286 (value_contents_writeable() is used when a writeable but fetched
287 buffer is required).. value_contents_raw() is used when data is
288 being stored into the buffer, or when it is certain that the
289 contents of the buffer are valid.
291 Note: The contents pointer is adjusted by the offset required to
292 get to the real subobject, if the value happens to represent
293 something embedded in a larger run-time object. */
295 extern gdb_byte
*value_contents_raw (struct value
*);
297 /* Actual contents of the value. For use of this value; setting it
298 uses the stuff above. Not valid if lazy is nonzero. Target
299 byte-order. We force it to be aligned properly for any possible
300 value. Note that a value therefore extends beyond what is
303 extern const gdb_byte
*value_contents (struct value
*);
304 extern gdb_byte
*value_contents_writeable (struct value
*);
306 /* The ALL variants of the above two macros do not adjust the returned
307 pointer by the embedded_offset value. */
309 extern gdb_byte
*value_contents_all_raw (struct value
*);
310 extern const gdb_byte
*value_contents_all (struct value
*);
312 /* Like value_contents_all, but does not require that the returned
313 bits be valid. This should only be used in situations where you
314 plan to check the validity manually. */
315 extern const gdb_byte
*value_contents_for_printing (struct value
*value
);
317 /* Like value_contents_for_printing, but accepts a constant value
318 pointer. Unlike value_contents_for_printing however, the pointed
319 value must _not_ be lazy. */
320 extern const gdb_byte
*
321 value_contents_for_printing_const (const struct value
*value
);
323 extern int value_fetch_lazy (struct value
*val
);
324 extern int value_contents_equal (struct value
*val1
, struct value
*val2
);
326 /* If nonzero, this is the value of a variable which does not actually
327 exist in the program, at least partially. If the value is lazy,
328 this may fetch it now. */
329 extern int value_optimized_out (struct value
*value
);
330 extern void set_value_optimized_out (struct value
*value
, int val
);
332 /* Like value_optimized_out, but don't fetch the value even if it is
333 lazy. Mainly useful for constructing other values using VALUE as
335 extern int value_optimized_out_const (const struct value
*value
);
337 /* Like value_optimized_out, but return false if any bit in the object
339 extern int value_entirely_optimized_out (const struct value
*value
);
341 /* Set or return field indicating whether a variable is initialized or
342 not, based on debugging information supplied by the compiler.
343 1 = initialized; 0 = uninitialized. */
344 extern int value_initialized (struct value
*);
345 extern void set_value_initialized (struct value
*, int);
347 /* Set COMPONENT's location as appropriate for a component of WHOLE
348 --- regardless of what kind of lvalue WHOLE is. */
349 extern void set_value_component_location (struct value
*component
,
350 const struct value
*whole
);
352 /* While the following fields are per- VALUE .CONTENT .PIECE (i.e., a
353 single value might have multiple LVALs), this hacked interface is
354 limited to just the first PIECE. Expect further change. */
355 /* Type of value; either not an lval, or one of the various different
356 possible kinds of lval. */
357 extern enum lval_type
*deprecated_value_lval_hack (struct value
*);
358 #define VALUE_LVAL(val) (*deprecated_value_lval_hack (val))
360 /* Like VALUE_LVAL, except the parameter can be const. */
361 extern enum lval_type
value_lval_const (const struct value
*value
);
363 /* If lval == lval_memory, return the address in the inferior. If
364 lval == lval_register, return the byte offset into the registers
365 structure. Otherwise, return 0. The returned address
366 includes the offset, if any. */
367 extern CORE_ADDR
value_address (const struct value
*);
369 /* Like value_address, except the result does not include value's
371 extern CORE_ADDR
value_raw_address (struct value
*);
373 /* Set the address of a value. */
374 extern void set_value_address (struct value
*, CORE_ADDR
);
376 /* Pointer to internal variable. */
377 extern struct internalvar
**deprecated_value_internalvar_hack (struct value
*);
378 #define VALUE_INTERNALVAR(val) (*deprecated_value_internalvar_hack (val))
380 /* Frame register value is relative to. This will be described in the
381 lval enum above as "lval_register". */
382 extern struct frame_id
*deprecated_value_frame_id_hack (struct value
*);
383 #define VALUE_FRAME_ID(val) (*deprecated_value_frame_id_hack (val))
385 /* Register number if the value is from a register. */
386 extern short *deprecated_value_regnum_hack (struct value
*);
387 #define VALUE_REGNUM(val) (*deprecated_value_regnum_hack (val))
389 /* Return value after lval_funcs->coerce_ref (after check_typedef). Return
390 NULL if lval_funcs->coerce_ref is not applicable for whatever reason. */
392 extern struct value
*coerce_ref_if_computed (const struct value
*arg
);
394 /* Setup a new value type and enclosing value type for dereferenced value VALUE.
395 ENC_TYPE is the new enclosing type that should be set. ORIGINAL_TYPE and
396 ORIGINAL_VAL are the type and value of the original reference or pointer.
398 Note, that VALUE is modified by this function.
400 It is a common implementation for coerce_ref and value_ind. */
402 extern struct value
* readjust_indirect_value_type (struct value
*value
,
403 struct type
*enc_type
,
404 struct type
*original_type
,
405 struct value
*original_val
);
407 /* Convert a REF to the object referenced. */
409 extern struct value
*coerce_ref (struct value
*value
);
411 /* If ARG is an array, convert it to a pointer.
412 If ARG is a function, convert it to a function pointer.
414 References are dereferenced. */
416 extern struct value
*coerce_array (struct value
*value
);
418 /* Given a value, determine whether the bits starting at OFFSET and
419 extending for LENGTH bits are valid. This returns nonzero if all
420 bits in the given range are valid, zero if any bit is invalid. */
422 extern int value_bits_valid (const struct value
*value
,
423 int offset
, int length
);
425 /* Given a value, determine whether the bits starting at OFFSET and
426 extending for LENGTH bits are a synthetic pointer. */
428 extern int value_bits_synthetic_pointer (const struct value
*value
,
429 int offset
, int length
);
431 /* Given a value, determine whether the contents bytes starting at
432 OFFSET and extending for LENGTH bytes are available. This returns
433 nonzero if all bytes in the given range are available, zero if any
434 byte is unavailable. */
436 extern int value_bytes_available (const struct value
*value
,
437 int offset
, int length
);
439 /* Like value_bytes_available, but return false if any byte in the
440 whole object is unavailable. */
441 extern int value_entirely_available (struct value
*value
);
443 /* Like value_entirely_available, but return false if any byte in the
444 whole object is available. */
445 extern int value_entirely_unavailable (struct value
*value
);
447 /* Mark VALUE's content bytes starting at OFFSET and extending for
448 LENGTH bytes as unavailable. */
450 extern void mark_value_bytes_unavailable (struct value
*value
,
451 int offset
, int length
);
453 /* Compare LENGTH bytes of VAL1's contents starting at OFFSET1 with
454 LENGTH bytes of VAL2's contents starting at OFFSET2.
456 Note that "contents" refers to the whole value's contents
457 (value_contents_all), without any embedded offset adjustment. For
458 example, to compare a complete object value with itself, including
459 its enclosing type chunk, you'd do:
461 int len = TYPE_LENGTH (check_typedef (value_enclosing_type (val)));
462 value_available_contents (val, 0, val, 0, len);
464 Returns true iff the set of available contents match. Unavailable
465 contents compare equal with unavailable contents, and different
466 with any available byte. For example, if 'x's represent an
467 unavailable byte, and 'V' and 'Z' represent different available
468 bytes, in a value with length 16:
471 contents: xxxxVVVVxxxxVVZZ
475 value_available_contents_eq(val, 0, val, 8, 6) => 1
476 value_available_contents_eq(val, 0, val, 4, 4) => 1
477 value_available_contents_eq(val, 0, val, 8, 8) => 0
478 value_available_contents_eq(val, 4, val, 12, 2) => 1
479 value_available_contents_eq(val, 4, val, 12, 4) => 0
480 value_available_contents_eq(val, 3, val, 4, 4) => 0
482 We only know whether a value chunk is available if we've tried to
483 read it. As this routine is used by printing routines, which may
484 be printing values in the value history, long after the inferior is
485 gone, it works with const values. Therefore, this routine must not
486 be called with lazy values. */
488 extern int value_available_contents_eq (const struct value
*val1
, int offset1
,
489 const struct value
*val2
, int offset2
,
492 /* Read LENGTH bytes of memory starting at MEMADDR into BUFFER, which
493 is (or will be copied to) VAL's contents buffer offset by
494 EMBEDDED_OFFSET (that is, to &VAL->contents[EMBEDDED_OFFSET]).
495 Marks value contents ranges as unavailable if the corresponding
496 memory is likewise unavailable. STACK indicates whether the memory
497 is known to be stack memory. */
499 extern void read_value_memory (struct value
*val
, int embedded_offset
,
500 int stack
, CORE_ADDR memaddr
,
501 gdb_byte
*buffer
, size_t length
);
503 /* Cast SCALAR_VALUE to the element type of VECTOR_TYPE, then replicate
504 into each element of a new vector value with VECTOR_TYPE. */
506 struct value
*value_vector_widen (struct value
*scalar_value
,
507 struct type
*vector_type
);
512 #include "gdbtypes.h"
513 #include "expression.h"
518 extern int print_address_demangle (const struct value_print_options
*,
519 struct gdbarch
*, CORE_ADDR
,
520 struct ui_file
*, int);
522 extern LONGEST
value_as_long (struct value
*val
);
523 extern DOUBLEST
value_as_double (struct value
*val
);
524 extern CORE_ADDR
value_as_address (struct value
*val
);
526 extern LONGEST
unpack_long (struct type
*type
, const gdb_byte
*valaddr
);
527 extern DOUBLEST
unpack_double (struct type
*type
, const gdb_byte
*valaddr
,
529 extern CORE_ADDR
unpack_pointer (struct type
*type
, const gdb_byte
*valaddr
);
531 extern int unpack_value_bits_as_long (struct type
*field_type
,
532 const gdb_byte
*valaddr
,
533 int embedded_offset
, int bitpos
,
535 const struct value
*original_value
,
538 extern LONGEST
unpack_field_as_long (struct type
*type
,
539 const gdb_byte
*valaddr
,
541 extern int unpack_value_field_as_long (struct type
*type
, const gdb_byte
*valaddr
,
542 int embedded_offset
, int fieldno
,
543 const struct value
*val
, LONGEST
*result
);
545 extern struct value
*value_field_bitfield (struct type
*type
, int fieldno
,
546 const gdb_byte
*valaddr
,
548 const struct value
*val
);
550 extern void pack_long (gdb_byte
*buf
, struct type
*type
, LONGEST num
);
552 extern struct value
*value_from_longest (struct type
*type
, LONGEST num
);
553 extern struct value
*value_from_ulongest (struct type
*type
, ULONGEST num
);
554 extern struct value
*value_from_pointer (struct type
*type
, CORE_ADDR addr
);
555 extern struct value
*value_from_double (struct type
*type
, DOUBLEST num
);
556 extern struct value
*value_from_decfloat (struct type
*type
,
557 const gdb_byte
*decbytes
);
558 extern struct value
*value_from_history_ref (char *, char **);
560 extern struct value
*value_at (struct type
*type
, CORE_ADDR addr
);
561 extern struct value
*value_at_lazy (struct type
*type
, CORE_ADDR addr
);
563 extern struct value
*value_from_contents_and_address (struct type
*,
566 extern struct value
*value_from_contents (struct type
*, const gdb_byte
*);
568 extern struct value
*default_value_from_register (struct type
*type
,
570 struct frame_info
*frame
);
572 extern void read_frame_register_value (struct value
*value
,
573 struct frame_info
*frame
);
575 extern struct value
*value_from_register (struct type
*type
, int regnum
,
576 struct frame_info
*frame
);
578 extern CORE_ADDR
address_from_register (struct type
*type
, int regnum
,
579 struct frame_info
*frame
);
581 extern struct value
*value_of_variable (struct symbol
*var
,
582 const struct block
*b
);
584 extern struct value
*address_of_variable (struct symbol
*var
,
585 const struct block
*b
);
587 extern struct value
*value_of_register (int regnum
, struct frame_info
*frame
);
589 struct value
*value_of_register_lazy (struct frame_info
*frame
, int regnum
);
591 extern int symbol_read_needs_frame (struct symbol
*);
593 extern struct value
*read_var_value (struct symbol
*var
,
594 struct frame_info
*frame
);
596 extern struct value
*default_read_var_value (struct symbol
*var
,
597 struct frame_info
*frame
);
599 extern struct value
*allocate_value (struct type
*type
);
600 extern struct value
*allocate_value_lazy (struct type
*type
);
601 extern void value_contents_copy (struct value
*dst
, int dst_offset
,
602 struct value
*src
, int src_offset
,
604 extern void value_contents_copy_raw (struct value
*dst
, int dst_offset
,
605 struct value
*src
, int src_offset
,
608 extern struct value
*allocate_repeat_value (struct type
*type
, int count
);
610 extern struct value
*value_mark (void);
612 extern void value_free_to_mark (struct value
*mark
);
614 extern struct value
*value_cstring (char *ptr
, ssize_t len
,
615 struct type
*char_type
);
616 extern struct value
*value_string (char *ptr
, ssize_t len
,
617 struct type
*char_type
);
619 extern struct value
*value_array (int lowbound
, int highbound
,
620 struct value
**elemvec
);
622 extern struct value
*value_concat (struct value
*arg1
, struct value
*arg2
);
624 extern struct value
*value_binop (struct value
*arg1
, struct value
*arg2
,
627 extern struct value
*value_ptradd (struct value
*arg1
, LONGEST arg2
);
629 extern LONGEST
value_ptrdiff (struct value
*arg1
, struct value
*arg2
);
631 extern int value_must_coerce_to_target (struct value
*arg1
);
633 extern struct value
*value_coerce_to_target (struct value
*arg1
);
635 extern struct value
*value_coerce_array (struct value
*arg1
);
637 extern struct value
*value_coerce_function (struct value
*arg1
);
639 extern struct value
*value_ind (struct value
*arg1
);
641 extern struct value
*value_addr (struct value
*arg1
);
643 extern struct value
*value_ref (struct value
*arg1
);
645 extern struct value
*value_assign (struct value
*toval
,
646 struct value
*fromval
);
648 extern struct value
*value_pos (struct value
*arg1
);
650 extern struct value
*value_neg (struct value
*arg1
);
652 extern struct value
*value_complement (struct value
*arg1
);
654 extern struct value
*value_struct_elt (struct value
**argp
,
656 const char *name
, int *static_memfuncp
,
659 extern struct value
*value_aggregate_elt (struct type
*curtype
,
661 struct type
*expect_type
,
665 extern struct value
*value_static_field (struct type
*type
, int fieldno
);
667 enum oload_search_type
{ NON_METHOD
, METHOD
, BOTH
};
669 extern int find_overload_match (struct value
**args
, int nargs
,
671 enum oload_search_type method
,
672 struct value
**objp
, struct symbol
*fsym
,
673 struct value
**valp
, struct symbol
**symp
,
674 int *staticp
, const int no_adl
);
676 extern struct value
*value_field (struct value
*arg1
, int fieldno
);
678 extern struct value
*value_primitive_field (struct value
*arg1
, int offset
,
680 struct type
*arg_type
);
683 extern struct type
*value_rtti_indirect_type (struct value
*, int *, int *,
686 extern struct value
*value_full_object (struct value
*, struct type
*, int,
689 extern struct value
*value_cast_pointers (struct type
*, struct value
*, int);
691 extern struct value
*value_cast (struct type
*type
, struct value
*arg2
);
693 extern struct value
*value_reinterpret_cast (struct type
*type
,
696 extern struct value
*value_dynamic_cast (struct type
*type
, struct value
*arg
);
698 extern struct value
*value_zero (struct type
*type
, enum lval_type lv
);
700 extern struct value
*value_one (struct type
*type
);
702 extern struct value
*value_repeat (struct value
*arg1
, int count
);
704 extern struct value
*value_subscript (struct value
*array
, LONGEST index
);
706 extern struct value
*value_bitstring_subscript (struct type
*type
,
707 struct value
*bitstring
,
710 extern struct value
*register_value_being_returned (struct type
*valtype
,
711 struct regcache
*retbuf
);
713 extern int value_in (struct value
*element
, struct value
*set
);
715 extern int value_bit_index (struct type
*type
, const gdb_byte
*addr
,
718 extern enum return_value_convention
719 struct_return_convention (struct gdbarch
*gdbarch
, struct value
*function
,
720 struct type
*value_type
);
722 extern int using_struct_return (struct gdbarch
*gdbarch
,
723 struct value
*function
,
724 struct type
*value_type
);
726 extern struct value
*evaluate_expression (struct expression
*exp
);
728 extern struct value
*evaluate_type (struct expression
*exp
);
730 extern struct value
*evaluate_subexp (struct type
*expect_type
,
731 struct expression
*exp
,
732 int *pos
, enum noside noside
);
734 extern struct value
*evaluate_subexpression_type (struct expression
*exp
,
737 extern void fetch_subexp_value (struct expression
*exp
, int *pc
,
738 struct value
**valp
, struct value
**resultp
,
739 struct value
**val_chain
,
740 int preserve_errors
);
742 extern char *extract_field_op (struct expression
*exp
, int *subexp
);
744 extern struct value
*evaluate_subexp_with_coercion (struct expression
*,
747 extern struct value
*parse_and_eval (const char *exp
);
749 extern struct value
*parse_to_comma_and_eval (const char **expp
);
751 extern struct type
*parse_and_eval_type (char *p
, int length
);
753 extern CORE_ADDR
parse_and_eval_address (const char *exp
);
755 extern LONGEST
parse_and_eval_long (const char *exp
);
757 extern void unop_promote (const struct language_defn
*language
,
758 struct gdbarch
*gdbarch
,
759 struct value
**arg1
);
761 extern void binop_promote (const struct language_defn
*language
,
762 struct gdbarch
*gdbarch
,
763 struct value
**arg1
, struct value
**arg2
);
765 extern struct value
*access_value_history (int num
);
767 extern struct value
*value_of_internalvar (struct gdbarch
*gdbarch
,
768 struct internalvar
*var
);
770 extern int get_internalvar_integer (struct internalvar
*var
, LONGEST
*l
);
772 extern void set_internalvar (struct internalvar
*var
, struct value
*val
);
774 extern void set_internalvar_integer (struct internalvar
*var
, LONGEST l
);
776 extern void set_internalvar_string (struct internalvar
*var
,
779 extern void clear_internalvar (struct internalvar
*var
);
781 extern void set_internalvar_component (struct internalvar
*var
,
783 int bitpos
, int bitsize
,
784 struct value
*newvalue
);
786 extern struct internalvar
*lookup_only_internalvar (const char *name
);
788 extern struct internalvar
*create_internalvar (const char *name
);
790 extern VEC (char_ptr
) *complete_internalvar (const char *name
);
792 /* An internalvar can be dynamically computed by supplying a vector of
793 function pointers to perform various operations. */
795 struct internalvar_funcs
797 /* Compute the value of the variable. The DATA argument passed to
798 the function is the same argument that was passed to
799 `create_internalvar_type_lazy'. */
801 struct value
*(*make_value
) (struct gdbarch
*arch
,
802 struct internalvar
*var
,
805 /* Update the agent expression EXPR with bytecode to compute the
806 value. VALUE is the agent value we are updating. The DATA
807 argument passed to this function is the same argument that was
808 passed to `create_internalvar_type_lazy'. If this pointer is
809 NULL, then the internalvar cannot be compiled to an agent
812 void (*compile_to_ax
) (struct internalvar
*var
,
813 struct agent_expr
*expr
,
814 struct axs_value
*value
,
817 /* If non-NULL, this is called to destroy DATA. The DATA argument
818 passed to this function is the same argument that was passed to
819 `create_internalvar_type_lazy'. */
821 void (*destroy
) (void *data
);
824 extern struct internalvar
*create_internalvar_type_lazy (const char *name
,
825 const struct internalvar_funcs
*funcs
,
828 /* Compile an internal variable to an agent expression. VAR is the
829 variable to compile; EXPR and VALUE are the agent expression we are
830 updating. This will return 0 if there is no known way to compile
831 VAR, and 1 if VAR was successfully compiled. It may also throw an
832 exception on error. */
834 extern int compile_internalvar_to_ax (struct internalvar
*var
,
835 struct agent_expr
*expr
,
836 struct axs_value
*value
);
838 extern struct internalvar
*lookup_internalvar (const char *name
);
840 extern int value_equal (struct value
*arg1
, struct value
*arg2
);
842 extern int value_equal_contents (struct value
*arg1
, struct value
*arg2
);
844 extern int value_less (struct value
*arg1
, struct value
*arg2
);
846 extern int value_logical_not (struct value
*arg1
);
850 extern struct value
*value_of_this (const struct language_defn
*lang
);
852 extern struct value
*value_of_this_silent (const struct language_defn
*lang
);
854 extern struct value
*value_x_binop (struct value
*arg1
, struct value
*arg2
,
856 enum exp_opcode otherop
,
859 extern struct value
*value_x_unop (struct value
*arg1
, enum exp_opcode op
,
862 extern struct value
*value_fn_field (struct value
**arg1p
, struct fn_field
*f
,
863 int j
, struct type
*type
, int offset
);
865 extern int binop_types_user_defined_p (enum exp_opcode op
,
869 extern int binop_user_defined_p (enum exp_opcode op
, struct value
*arg1
,
872 extern int unop_user_defined_p (enum exp_opcode op
, struct value
*arg1
);
874 extern int destructor_name_p (const char *name
, struct type
*type
);
876 extern void value_incref (struct value
*val
);
878 extern void value_free (struct value
*val
);
880 extern void free_all_values (void);
882 extern void free_value_chain (struct value
*v
);
884 extern void release_value (struct value
*val
);
886 extern void release_value_or_incref (struct value
*val
);
888 extern int record_latest_value (struct value
*val
);
890 extern void modify_field (struct type
*type
, gdb_byte
*addr
,
891 LONGEST fieldval
, int bitpos
, int bitsize
);
893 extern void type_print (struct type
*type
, const char *varstring
,
894 struct ui_file
*stream
, int show
);
896 extern char *type_to_string (struct type
*type
);
898 extern gdb_byte
*baseclass_addr (struct type
*type
, int index
,
900 struct value
**valuep
, int *errp
);
902 extern void print_longest (struct ui_file
*stream
, int format
,
903 int use_local
, LONGEST val
);
905 extern void print_floating (const gdb_byte
*valaddr
, struct type
*type
,
906 struct ui_file
*stream
);
908 extern void print_decimal_floating (const gdb_byte
*valaddr
, struct type
*type
,
909 struct ui_file
*stream
);
911 extern void value_print (struct value
*val
, struct ui_file
*stream
,
912 const struct value_print_options
*options
);
914 extern void value_print_array_elements (struct value
*val
,
915 struct ui_file
*stream
, int format
,
916 enum val_prettyformat pretty
);
918 extern struct value
*value_release_to_mark (struct value
*mark
);
920 extern void val_print (struct type
*type
, const gdb_byte
*valaddr
,
921 int embedded_offset
, CORE_ADDR address
,
922 struct ui_file
*stream
, int recurse
,
923 const struct value
*val
,
924 const struct value_print_options
*options
,
925 const struct language_defn
*language
);
927 extern void common_val_print (struct value
*val
,
928 struct ui_file
*stream
, int recurse
,
929 const struct value_print_options
*options
,
930 const struct language_defn
*language
);
932 extern int val_print_string (struct type
*elttype
, const char *encoding
,
933 CORE_ADDR addr
, int len
,
934 struct ui_file
*stream
,
935 const struct value_print_options
*options
);
937 extern void print_variable_and_value (const char *name
,
939 struct frame_info
*frame
,
940 struct ui_file
*stream
,
943 extern void typedef_print (struct type
*type
, struct symbol
*news
,
944 struct ui_file
*stream
);
946 extern char *internalvar_name (struct internalvar
*var
);
948 extern void preserve_values (struct objfile
*);
952 extern struct value
*value_copy (struct value
*);
954 extern struct value
*value_non_lval (struct value
*);
956 extern void preserve_one_value (struct value
*, struct objfile
*, htab_t
);
960 extern struct value
*varying_to_slice (struct value
*);
962 extern struct value
*value_slice (struct value
*, int, int);
964 extern struct value
*value_literal_complex (struct value
*, struct value
*,
967 extern struct value
*find_function_in_inferior (const char *,
970 extern struct value
*value_allocate_space_in_inferior (int);
972 extern struct value
*value_subscripted_rvalue (struct value
*array
,
973 LONGEST index
, int lowerbound
);
975 /* User function handler. */
977 typedef struct value
*(*internal_function_fn
) (struct gdbarch
*gdbarch
,
978 const struct language_defn
*language
,
981 struct value
**argv
);
983 void add_internal_function (const char *name
, const char *doc
,
984 internal_function_fn handler
,
987 struct value
*call_internal_function (struct gdbarch
*gdbarch
,
988 const struct language_defn
*language
,
989 struct value
*function
,
990 int argc
, struct value
**argv
);
992 char *value_internal_function_name (struct value
*);
994 #endif /* !defined (VALUE_H) */