1 /* Definitions for values of C expressions, for GDB.
3 Copyright (C) 1986-2012 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 *);
78 /* Describes offset of a value within lval of a structure in bytes.
79 If lval == lval_memory, this is an offset to the address. If lval
80 == lval_register, this is a further offset from location.address
81 within the registers structure. Note also the member
82 embedded_offset below. */
84 extern int value_offset (const struct value *);
85 extern void set_value_offset (struct value *, int offset);
87 /* The comment from "struct value" reads: ``Is it modifiable? Only
88 relevant if lval != not_lval.''. Shouldn't the value instead be
89 not_lval and be done with it? */
91 extern int deprecated_value_modifiable (struct value *value);
92 extern void deprecated_set_value_modifiable (struct value *value,
95 /* If a value represents a C++ object, then the `type' field gives the
96 object's compile-time type. If the object actually belongs to some
97 class derived from `type', perhaps with other base classes and
98 additional members, then `type' is just a subobject of the real
99 thing, and the full object is probably larger than `type' would
102 If `type' is a dynamic class (i.e. one with a vtable), then GDB can
103 actually determine the object's run-time type by looking at the
104 run-time type information in the vtable. When this information is
105 available, we may elect to read in the entire object, for several
108 - When printing the value, the user would probably rather see the
109 full object, not just the limited portion apparent from the
112 - If `type' has virtual base classes, then even printing `type'
113 alone may require reaching outside the `type' portion of the
114 object to wherever the virtual base class has been stored.
116 When we store the entire object, `enclosing_type' is the run-time
117 type -- the complete object -- and `embedded_offset' is the offset
118 of `type' within that larger type, in bytes. The value_contents()
119 macro takes `embedded_offset' into account, so most GDB code
120 continues to see the `type' portion of the value, just as the
123 If `type' is a pointer to an object, then `enclosing_type' is a
124 pointer to the object's run-time type, and `pointed_to_offset' is
125 the offset in bytes from the full object to the pointed-to object
126 -- that is, the value `embedded_offset' would have if we followed
127 the pointer and fetched the complete object. (I don't really see
128 the point. Why not just determine the run-time type when you
129 indirect, and avoid the special case? The contents don't matter
130 until you indirect anyway.)
132 If we're not doing anything fancy, `enclosing_type' is equal to
133 `type', and `embedded_offset' is zero, so everything works
136 extern struct type *value_enclosing_type (struct value *);
137 extern void set_value_enclosing_type (struct value *val,
138 struct type *new_type);
140 extern int value_pointed_to_offset (struct value *value);
141 extern void set_value_pointed_to_offset (struct value *value, int val);
142 extern int value_embedded_offset (struct value *value);
143 extern void set_value_embedded_offset (struct value *value, int val);
145 /* For lval_computed values, this structure holds functions used to
146 retrieve and set the value (or portions of the value).
148 For each function, 'V' is the 'this' pointer: an lval_funcs
149 function F may always assume that the V it receives is an
150 lval_computed value, and has F in the appropriate slot of its
151 lval_funcs structure. */
155 /* Fill in VALUE's contents. This is used to "un-lazy" values. If
156 a problem arises in obtaining VALUE's bits, this function should
157 call 'error'. If it is NULL value_fetch_lazy on "un-lazy"
158 non-optimized-out value is an internal error. */
159 void (*read) (struct value *v);
161 /* Handle an assignment TOVAL = FROMVAL by writing the value of
162 FROMVAL to TOVAL's location. The contents of TOVAL have not yet
163 been updated. If a problem arises in doing so, this function
164 should call 'error'. If it is NULL such TOVAL assignment is an error as
165 TOVAL is not considered as an lvalue. */
166 void (*write) (struct value *toval, struct value *fromval);
168 /* Check the validity of some bits in VALUE. This should return 1
169 if all the bits starting at OFFSET and extending for LENGTH bits
170 are valid, or 0 if any bit is invalid. */
171 int (*check_validity) (const struct value *value, int offset, int length);
173 /* Return 1 if any bit in VALUE is valid, 0 if they are all invalid. */
174 int (*check_any_valid) (const struct value *value);
176 /* If non-NULL, this is used to implement pointer indirection for
177 this value. This method may return NULL, in which case value_ind
178 will fall back to ordinary indirection. */
179 struct value *(*indirect) (struct value *value);
181 /* If non-NULL, this is used to implement reference resolving for
182 this value. This method may return NULL, in which case coerce_ref
183 will fall back to ordinary references resolving. */
184 struct value *(*coerce_ref) (const struct value *value);
186 /* If non-NULL, this is used to determine whether the indicated bits
187 of VALUE are a synthetic pointer. */
188 int (*check_synthetic_pointer) (const struct value *value,
189 int offset, int length);
191 /* Return a duplicate of VALUE's closure, for use in a new value.
192 This may simply return the same closure, if VALUE's is
193 reference-counted or statically allocated.
195 This may be NULL, in which case VALUE's closure is re-used in the
197 void *(*copy_closure) (const struct value *v);
199 /* Drop VALUE's reference to its closure. Maybe this frees the
200 closure; maybe this decrements a reference count; maybe the
201 closure is statically allocated and this does nothing.
203 This may be NULL, in which case no action is taken to free
205 void (*free_closure) (struct value *v);
208 /* Create a computed lvalue, with type TYPE, function pointers FUNCS,
209 and closure CLOSURE. */
211 extern struct value *allocate_computed_value (struct type *type,
212 const struct lval_funcs *funcs,
215 extern struct value *allocate_optimized_out_value (struct type *type);
217 /* If VALUE is lval_computed, return its lval_funcs structure. */
219 extern const struct lval_funcs *value_computed_funcs (const struct value *);
221 /* If VALUE is lval_computed, return its closure. The meaning of the
222 returned value depends on the functions VALUE uses. */
224 extern void *value_computed_closure (const struct value *value);
226 /* If zero, contents of this value are in the contents field. If
227 nonzero, contents are in inferior. If the lval field is lval_memory,
228 the contents are in inferior memory at location.address plus offset.
229 The lval field may also be lval_register.
231 WARNING: This field is used by the code which handles watchpoints
232 (see breakpoint.c) to decide whether a particular value can be
233 watched by hardware watchpoints. If the lazy flag is set for some
234 member of a value chain, it is assumed that this member of the
235 chain doesn't need to be watched as part of watching the value
236 itself. This is how GDB avoids watching the entire struct or array
237 when the user wants to watch a single struct member or array
238 element. If you ever change the way lazy flag is set and reset, be
239 sure to consider this use as well! */
241 extern int value_lazy (struct value *);
242 extern void set_value_lazy (struct value *value, int val);
244 extern int value_stack (struct value *);
245 extern void set_value_stack (struct value *value, int val);
247 /* value_contents() and value_contents_raw() both return the address
248 of the gdb buffer used to hold a copy of the contents of the lval.
249 value_contents() is used when the contents of the buffer are needed
250 -- it uses value_fetch_lazy() to load the buffer from the process
251 being debugged if it hasn't already been loaded
252 (value_contents_writeable() is used when a writeable but fetched
253 buffer is required).. value_contents_raw() is used when data is
254 being stored into the buffer, or when it is certain that the
255 contents of the buffer are valid.
257 Note: The contents pointer is adjusted by the offset required to
258 get to the real subobject, if the value happens to represent
259 something embedded in a larger run-time object. */
261 extern gdb_byte *value_contents_raw (struct value *);
263 /* Actual contents of the value. For use of this value; setting it
264 uses the stuff above. Not valid if lazy is nonzero. Target
265 byte-order. We force it to be aligned properly for any possible
266 value. Note that a value therefore extends beyond what is
269 extern const gdb_byte *value_contents (struct value *);
270 extern gdb_byte *value_contents_writeable (struct value *);
272 /* The ALL variants of the above two macros do not adjust the returned
273 pointer by the embedded_offset value. */
275 extern gdb_byte *value_contents_all_raw (struct value *);
276 extern const gdb_byte *value_contents_all (struct value *);
278 /* Like value_contents_all, but does not require that the returned
279 bits be valid. This should only be used in situations where you
280 plan to check the validity manually. */
281 extern const gdb_byte *value_contents_for_printing (struct value *value);
283 /* Like value_contents_for_printing, but accepts a constant value
284 pointer. Unlike value_contents_for_printing however, the pointed
285 value must _not_ be lazy. */
286 extern const gdb_byte *
287 value_contents_for_printing_const (const struct value *value);
289 extern int value_fetch_lazy (struct value *val);
290 extern int value_contents_equal (struct value *val1, struct value *val2);
292 /* If nonzero, this is the value of a variable which does not actually
293 exist in the program. */
294 extern int value_optimized_out (struct value *value);
295 extern void set_value_optimized_out (struct value *value, int val);
297 /* Like value_optimized_out, but return false if any bit in the object
299 extern int value_entirely_optimized_out (const struct value *value);
301 /* Set or return field indicating whether a variable is initialized or
302 not, based on debugging information supplied by the compiler.
303 1 = initialized; 0 = uninitialized. */
304 extern int value_initialized (struct value *);
305 extern void set_value_initialized (struct value *, int);
307 /* Set COMPONENT's location as appropriate for a component of WHOLE
308 --- regardless of what kind of lvalue WHOLE is. */
309 extern void set_value_component_location (struct value *component,
310 const struct value *whole);
312 /* While the following fields are per- VALUE .CONTENT .PIECE (i.e., a
313 single value might have multiple LVALs), this hacked interface is
314 limited to just the first PIECE. Expect further change. */
315 /* Type of value; either not an lval, or one of the various different
316 possible kinds of lval. */
317 extern enum lval_type *deprecated_value_lval_hack (struct value *);
318 #define VALUE_LVAL(val) (*deprecated_value_lval_hack (val))
320 /* Like VALUE_LVAL, except the parameter can be const. */
321 extern enum lval_type value_lval_const (const struct value *value);
323 /* If lval == lval_memory, return the address in the inferior. If
324 lval == lval_register, return the byte offset into the registers
325 structure. Otherwise, return 0. The returned address
326 includes the offset, if any. */
327 extern CORE_ADDR value_address (const struct value *);
329 /* Like value_address, except the result does not include value's
331 extern CORE_ADDR value_raw_address (struct value *);
333 /* Set the address of a value. */
334 extern void set_value_address (struct value *, CORE_ADDR);
336 /* Pointer to internal variable. */
337 extern struct internalvar **deprecated_value_internalvar_hack (struct value *);
338 #define VALUE_INTERNALVAR(val) (*deprecated_value_internalvar_hack (val))
340 /* Frame register value is relative to. This will be described in the
341 lval enum above as "lval_register". */
342 extern struct frame_id *deprecated_value_frame_id_hack (struct value *);
343 #define VALUE_FRAME_ID(val) (*deprecated_value_frame_id_hack (val))
345 /* Register number if the value is from a register. */
346 extern short *deprecated_value_regnum_hack (struct value *);
347 #define VALUE_REGNUM(val) (*deprecated_value_regnum_hack (val))
349 /* Return value after lval_funcs->coerce_ref (after check_typedef). Return
350 NULL if lval_funcs->coerce_ref is not applicable for whatever reason. */
352 extern struct value *coerce_ref_if_computed (const struct value *arg);
354 /* Convert a REF to the object referenced. */
356 extern struct value *coerce_ref (struct value *value);
358 /* If ARG is an array, convert it to a pointer.
359 If ARG is a function, convert it to a function pointer.
361 References are dereferenced. */
363 extern struct value *coerce_array (struct value *value);
365 /* Given a value, determine whether the bits starting at OFFSET and
366 extending for LENGTH bits are valid. This returns nonzero if all
367 bits in the given range are valid, zero if any bit is invalid. */
369 extern int value_bits_valid (const struct value *value,
370 int offset, int length);
372 /* Given a value, determine whether the bits starting at OFFSET and
373 extending for LENGTH bits are a synthetic pointer. */
375 extern int value_bits_synthetic_pointer (const struct value *value,
376 int offset, int length);
378 /* Given a value, determine whether the contents bytes starting at
379 OFFSET and extending for LENGTH bytes are available. This returns
380 nonzero if all bytes in the given range are available, zero if any
381 byte is unavailable. */
383 extern int value_bytes_available (const struct value *value,
384 int offset, int length);
386 /* Like value_bytes_available, but return false if any byte in the
387 whole object is unavailable. */
388 extern int value_entirely_available (struct value *value);
390 /* Mark VALUE's content bytes starting at OFFSET and extending for
391 LENGTH bytes as unavailable. */
393 extern void mark_value_bytes_unavailable (struct value *value,
394 int offset, int length);
396 /* Compare LENGTH bytes of VAL1's contents starting at OFFSET1 with
397 LENGTH bytes of VAL2's contents starting at OFFSET2.
399 Note that "contents" refers to the whole value's contents
400 (value_contents_all), without any embedded offset adjustment. For
401 example, to compare a complete object value with itself, including
402 its enclosing type chunk, you'd do:
404 int len = TYPE_LENGTH (check_typedef (value_enclosing_type (val)));
405 value_available_contents (val, 0, val, 0, len);
407 Returns true iff the set of available contents match. Unavailable
408 contents compare equal with unavailable contents, and different
409 with any available byte. For example, if 'x's represent an
410 unavailable byte, and 'V' and 'Z' represent different available
411 bytes, in a value with length 16:
414 contents: xxxxVVVVxxxxVVZZ
418 value_available_contents_eq(val, 0, val, 8, 6) => 1
419 value_available_contents_eq(val, 0, val, 4, 4) => 1
420 value_available_contents_eq(val, 0, val, 8, 8) => 0
421 value_available_contents_eq(val, 4, val, 12, 2) => 1
422 value_available_contents_eq(val, 4, val, 12, 4) => 0
423 value_available_contents_eq(val, 3, val, 4, 4) => 0
426 extern int value_available_contents_eq (const struct value *val1, int offset1,
427 const struct value *val2, int offset2,
430 /* Read LENGTH bytes of memory starting at MEMADDR into BUFFER, which
431 is (or will be copied to) VAL's contents buffer offset by
432 EMBEDDED_OFFSET (that is, to &VAL->contents[EMBEDDED_OFFSET]).
433 Marks value contents ranges as unavailable if the corresponding
434 memory is likewise unavailable. STACK indicates whether the memory
435 is known to be stack memory. */
437 extern void read_value_memory (struct value *val, int embedded_offset,
438 int stack, CORE_ADDR memaddr,
439 gdb_byte *buffer, size_t length);
444 #include "gdbtypes.h"
445 #include "expression.h"
450 extern void print_address_demangle (struct gdbarch *, CORE_ADDR,
451 struct ui_file *, int);
453 extern LONGEST value_as_long (struct value *val);
454 extern DOUBLEST value_as_double (struct value *val);
455 extern CORE_ADDR value_as_address (struct value *val);
457 extern LONGEST unpack_long (struct type *type, const gdb_byte *valaddr);
458 extern DOUBLEST unpack_double (struct type *type, const gdb_byte *valaddr,
460 extern CORE_ADDR unpack_pointer (struct type *type, const gdb_byte *valaddr);
462 extern int unpack_value_bits_as_long (struct type *field_type,
463 const gdb_byte *valaddr,
464 int embedded_offset, int bitpos,
466 const struct value *original_value,
469 extern LONGEST unpack_field_as_long (struct type *type,
470 const gdb_byte *valaddr,
472 extern int unpack_value_field_as_long (struct type *type, const gdb_byte *valaddr,
473 int embedded_offset, int fieldno,
474 const struct value *val, LONGEST *result);
476 extern struct value *value_field_bitfield (struct type *type, int fieldno,
477 const gdb_byte *valaddr,
479 const struct value *val);
481 extern void pack_long (gdb_byte *buf, struct type *type, LONGEST num);
483 extern struct value *value_from_longest (struct type *type, LONGEST num);
484 extern struct value *value_from_ulongest (struct type *type, ULONGEST num);
485 extern struct value *value_from_pointer (struct type *type, CORE_ADDR addr);
486 extern struct value *value_from_double (struct type *type, DOUBLEST num);
487 extern struct value *value_from_decfloat (struct type *type,
488 const gdb_byte *decbytes);
489 extern struct value *value_from_history_ref (char *, char **);
491 extern struct value *value_at (struct type *type, CORE_ADDR addr);
492 extern struct value *value_at_lazy (struct type *type, CORE_ADDR addr);
494 extern struct value *value_from_contents_and_address (struct type *,
497 extern struct value *value_from_contents (struct type *, const gdb_byte *);
499 extern struct value *default_value_from_register (struct type *type,
501 struct frame_info *frame);
503 extern void read_frame_register_value (struct value *value,
504 struct frame_info *frame);
506 extern struct value *value_from_register (struct type *type, int regnum,
507 struct frame_info *frame);
509 extern CORE_ADDR address_from_register (struct type *type, int regnum,
510 struct frame_info *frame);
512 extern struct value *value_of_variable (struct symbol *var,
513 const struct block *b);
515 extern struct value *address_of_variable (struct symbol *var, struct block *b);
517 extern struct value *value_of_register (int regnum, struct frame_info *frame);
519 struct value *value_of_register_lazy (struct frame_info *frame, int regnum);
521 extern int symbol_read_needs_frame (struct symbol *);
523 extern struct value *read_var_value (struct symbol *var,
524 struct frame_info *frame);
526 extern struct value *allocate_value (struct type *type);
527 extern struct value *allocate_value_lazy (struct type *type);
528 extern void allocate_value_contents (struct value *value);
529 extern void value_contents_copy (struct value *dst, int dst_offset,
530 struct value *src, int src_offset,
532 extern void value_contents_copy_raw (struct value *dst, int dst_offset,
533 struct value *src, int src_offset,
536 extern struct value *allocate_repeat_value (struct type *type, int count);
538 extern struct value *value_mark (void);
540 extern void value_free_to_mark (struct value *mark);
542 extern struct value *value_cstring (char *ptr, int len,
543 struct type *char_type);
544 extern struct value *value_string (char *ptr, int len,
545 struct type *char_type);
546 extern struct value *value_bitstring (char *ptr, int len,
547 struct type *index_type);
549 extern struct value *value_array (int lowbound, int highbound,
550 struct value **elemvec);
552 extern struct value *value_concat (struct value *arg1, struct value *arg2);
554 extern struct value *value_binop (struct value *arg1, struct value *arg2,
557 extern struct value *value_ptradd (struct value *arg1, LONGEST arg2);
559 extern LONGEST value_ptrdiff (struct value *arg1, struct value *arg2);
561 extern int value_must_coerce_to_target (struct value *arg1);
563 extern struct value *value_coerce_to_target (struct value *arg1);
565 extern struct value *value_coerce_array (struct value *arg1);
567 extern struct value *value_coerce_function (struct value *arg1);
569 extern struct value *value_ind (struct value *arg1);
571 extern struct value *value_addr (struct value *arg1);
573 extern struct value *value_ref (struct value *arg1);
575 extern struct value *value_assign (struct value *toval,
576 struct value *fromval);
578 extern struct value *value_pos (struct value *arg1);
580 extern struct value *value_neg (struct value *arg1);
582 extern struct value *value_complement (struct value *arg1);
584 extern struct value *value_struct_elt (struct value **argp,
586 const char *name, int *static_memfuncp,
589 extern struct value *value_aggregate_elt (struct type *curtype,
591 struct type *expect_type,
595 extern struct value *value_static_field (struct type *type, int fieldno);
597 extern struct fn_field *value_find_oload_method_list (struct value **,
600 struct type **, int *);
602 enum oload_search_type { NON_METHOD, METHOD, BOTH };
604 extern int find_overload_match (struct value **args, int nargs,
606 enum oload_search_type method, int lax,
607 struct value **objp, struct symbol *fsym,
608 struct value **valp, struct symbol **symp,
609 int *staticp, const int no_adl);
611 extern struct value *value_field (struct value *arg1, int fieldno);
613 extern struct value *value_primitive_field (struct value *arg1, int offset,
615 struct type *arg_type);
618 extern struct type *value_rtti_target_type (struct value *, int *, int *,
621 extern struct value *value_full_object (struct value *, struct type *, int,
624 extern struct value *value_cast_pointers (struct type *, struct value *);
626 extern struct value *value_cast (struct type *type, struct value *arg2);
628 extern struct value *value_reinterpret_cast (struct type *type,
631 extern struct value *value_dynamic_cast (struct type *type, struct value *arg);
633 extern struct value *value_zero (struct type *type, enum lval_type lv);
635 extern struct value *value_one (struct type *type);
637 extern struct value *value_repeat (struct value *arg1, int count);
639 extern struct value *value_subscript (struct value *array, LONGEST index);
641 extern struct value *value_bitstring_subscript (struct type *type,
642 struct value *bitstring,
645 extern struct value *register_value_being_returned (struct type *valtype,
646 struct regcache *retbuf);
648 extern int value_in (struct value *element, struct value *set);
650 extern int value_bit_index (struct type *type, const gdb_byte *addr,
653 extern int using_struct_return (struct gdbarch *gdbarch,
654 struct type *func_type,
655 struct type *value_type);
657 extern struct value *evaluate_expression (struct expression *exp);
659 extern struct value *evaluate_type (struct expression *exp);
661 extern struct value *evaluate_subexp (struct type *expect_type,
662 struct expression *exp,
663 int *pos, enum noside noside);
665 extern struct value *evaluate_subexpression_type (struct expression *exp,
668 extern void fetch_subexp_value (struct expression *exp, int *pc,
669 struct value **valp, struct value **resultp,
670 struct value **val_chain);
672 extern char *extract_field_op (struct expression *exp, int *subexp);
674 extern struct value *evaluate_subexp_with_coercion (struct expression *,
677 extern struct value *parse_and_eval (char *exp);
679 extern struct value *parse_to_comma_and_eval (char **expp);
681 extern struct type *parse_and_eval_type (char *p, int length);
683 extern CORE_ADDR parse_and_eval_address (char *exp);
685 extern LONGEST parse_and_eval_long (char *exp);
687 extern void unop_promote (const struct language_defn *language,
688 struct gdbarch *gdbarch,
689 struct value **arg1);
691 extern void binop_promote (const struct language_defn *language,
692 struct gdbarch *gdbarch,
693 struct value **arg1, struct value **arg2);
695 extern struct value *access_value_history (int num);
697 extern struct value *value_of_internalvar (struct gdbarch *gdbarch,
698 struct internalvar *var);
700 extern int get_internalvar_integer (struct internalvar *var, LONGEST *l);
702 extern void set_internalvar (struct internalvar *var, struct value *val);
704 extern void set_internalvar_integer (struct internalvar *var, LONGEST l);
706 extern void set_internalvar_string (struct internalvar *var,
709 extern void clear_internalvar (struct internalvar *var);
711 extern void set_internalvar_component (struct internalvar *var,
713 int bitpos, int bitsize,
714 struct value *newvalue);
716 extern struct internalvar *lookup_only_internalvar (const char *name);
718 extern struct internalvar *create_internalvar (const char *name);
720 typedef struct value * (*internalvar_make_value) (struct gdbarch *,
721 struct internalvar *);
722 extern struct internalvar *
723 create_internalvar_type_lazy (char *name, internalvar_make_value fun);
725 extern struct internalvar *lookup_internalvar (const char *name);
727 extern int value_equal (struct value *arg1, struct value *arg2);
729 extern int value_equal_contents (struct value *arg1, struct value *arg2);
731 extern int value_less (struct value *arg1, struct value *arg2);
733 extern int value_logical_not (struct value *arg1);
737 extern struct value *value_of_this (const struct language_defn *lang);
739 extern struct value *value_of_this_silent (const struct language_defn *lang);
741 extern struct value *value_x_binop (struct value *arg1, struct value *arg2,
743 enum exp_opcode otherop,
746 extern struct value *value_x_unop (struct value *arg1, enum exp_opcode op,
749 extern struct value *value_fn_field (struct value **arg1p, struct fn_field *f,
750 int j, struct type *type, int offset);
752 extern int binop_types_user_defined_p (enum exp_opcode op,
756 extern int binop_user_defined_p (enum exp_opcode op, struct value *arg1,
759 extern int unop_user_defined_p (enum exp_opcode op, struct value *arg1);
761 extern int destructor_name_p (const char *name, struct type *type);
763 extern void value_incref (struct value *val);
765 extern void value_free (struct value *val);
767 extern void free_all_values (void);
769 extern void free_value_chain (struct value *v);
771 extern void release_value (struct value *val);
773 extern void release_value_or_incref (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) */