1 /* Definitions for values of C expressions, for GDB. 2 3 Copyright (C) 1986-2012 Free Software Foundation, Inc. 4 5 This file is part of GDB. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 19 20 #if !defined (VALUE_H) 21 #define VALUE_H 1 22 23 #include "doublest.h" 24 #include "frame.h" /* For struct frame_id. */ 25 26 struct block; 27 struct expression; 28 struct regcache; 29 struct symbol; 30 struct type; 31 struct ui_file; 32 struct language_defn; 33 struct value_print_options; 34 35 /* The structure which defines the type of a value. It should never 36 be possible for a program lval value to survive over a call to the 37 inferior (i.e. to be put into the history list or an internal 38 variable). */ 39 40 struct value; 41 42 /* Values are stored in a chain, so that they can be deleted easily 43 over calls to the inferior. Values assigned to internal variables, 44 put into the value history or exposed to Python are taken off this 45 list. */ 46 47 struct value *value_next (struct value *); 48 49 /* Type of the value. */ 50 51 extern struct type *value_type (const struct value *); 52 53 /* This is being used to change the type of an existing value, that 54 code should instead be creating a new value with the changed type 55 (but possibly shared content). */ 56 57 extern void deprecated_set_value_type (struct value *value, 58 struct type *type); 59 60 /* Only used for bitfields; number of bits contained in them. */ 61 62 extern int value_bitsize (const struct value *); 63 extern void set_value_bitsize (struct value *, int bit); 64 65 /* Only used for bitfields; position of start of field. For 66 gdbarch_bits_big_endian=0 targets, it is the position of the LSB. For 67 gdbarch_bits_big_endian=1 targets, it is the position of the MSB. */ 68 69 extern int value_bitpos (const struct value *); 70 extern void set_value_bitpos (struct value *, int bit); 71 72 /* Only used for bitfields; the containing value. This allows a 73 single read from the target when displaying multiple 74 bitfields. */ 75 76 struct value *value_parent (struct value *); 77 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. */ 83 84 extern int value_offset (const struct value *); 85 extern void set_value_offset (struct value *, int offset); 86 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? */ 90 91 extern int deprecated_value_modifiable (struct value *value); 92 extern void deprecated_set_value_modifiable (struct value *value, 93 int modifiable); 94 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 100 suggest. 101 102 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 106 reasons: 107 108 - When printing the value, the user would probably rather see the 109 full object, not just the limited portion apparent from the 110 compile-time type. 111 112 - 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. 115 116 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 121 inferior would. 122 123 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.) 131 132 If we're not doing anything fancy, `enclosing_type' is equal to 133 `type', and `embedded_offset' is zero, so everything works 134 normally. */ 135 136 extern struct type *value_enclosing_type (struct value *); 137 extern void set_value_enclosing_type (struct value *val, 138 struct type *new_type); 139 140 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); 144 145 /* For lval_computed values, this structure holds functions used to 146 retrieve and set the value (or portions of the value). 147 148 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. */ 152 153 struct lval_funcs 154 { 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); 160 161 /* 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); 167 168 /* 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); 172 173 /* Return 1 if any bit in VALUE is valid, 0 if they are all invalid. */ 174 int (*check_any_valid) (const struct value *value); 175 176 /* 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); 180 181 /* 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); 185 186 /* 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); 190 191 /* 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. 194 195 This may be NULL, in which case VALUE's closure is re-used in the 196 new value. */ 197 void *(*copy_closure) (const struct value *v); 198 199 /* 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. 202 203 This may be NULL, in which case no action is taken to free 204 VALUE's closure. */ 205 void (*free_closure) (struct value *v); 206 }; 207 208 /* Create a computed lvalue, with type TYPE, function pointers FUNCS, 209 and closure CLOSURE. */ 210 211 extern struct value *allocate_computed_value (struct type *type, 212 const struct lval_funcs *funcs, 213 void *closure); 214 215 extern struct value *allocate_optimized_out_value (struct type *type); 216 217 /* If VALUE is lval_computed, return its lval_funcs structure. */ 218 219 extern const struct lval_funcs *value_computed_funcs (const struct value *); 220 221 /* If VALUE is lval_computed, return its closure. The meaning of the 222 returned value depends on the functions VALUE uses. */ 223 224 extern void *value_computed_closure (const struct value *value); 225 226 /* 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. 230 231 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! */ 240 241 extern int value_lazy (struct value *); 242 extern void set_value_lazy (struct value *value, int val); 243 244 extern int value_stack (struct value *); 245 extern void set_value_stack (struct value *value, int val); 246 247 /* 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. 256 257 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. */ 260 261 extern gdb_byte *value_contents_raw (struct value *); 262 263 /* 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 267 declared here. */ 268 269 extern const gdb_byte *value_contents (struct value *); 270 extern gdb_byte *value_contents_writeable (struct value *); 271 272 /* The ALL variants of the above two macros do not adjust the returned 273 pointer by the embedded_offset value. */ 274 275 extern gdb_byte *value_contents_all_raw (struct value *); 276 extern const gdb_byte *value_contents_all (struct value *); 277 278 /* 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); 282 283 /* 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); 288 289 extern int value_fetch_lazy (struct value *val); 290 extern int value_contents_equal (struct value *val1, struct value *val2); 291 292 /* 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); 296 297 /* Like value_optimized_out, but return false if any bit in the object 298 is valid. */ 299 extern int value_entirely_optimized_out (const struct value *value); 300 301 /* 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); 306 307 /* 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); 311 312 /* 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)) 319 320 /* Like VALUE_LVAL, except the parameter can be const. */ 321 extern enum lval_type value_lval_const (const struct value *value); 322 323 /* 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 *); 328 329 /* Like value_address, except the result does not include value's 330 offset. */ 331 extern CORE_ADDR value_raw_address (struct value *); 332 333 /* Set the address of a value. */ 334 extern void set_value_address (struct value *, CORE_ADDR); 335 336 /* Pointer to internal variable. */ 337 extern struct internalvar **deprecated_value_internalvar_hack (struct value *); 338 #define VALUE_INTERNALVAR(val) (*deprecated_value_internalvar_hack (val)) 339 340 /* 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)) 344 345 /* 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)) 348 349 /* Return value after lval_funcs->coerce_ref (after check_typedef). Return 350 NULL if lval_funcs->coerce_ref is not applicable for whatever reason. */ 351 352 extern struct value *coerce_ref_if_computed (const struct value *arg); 353 354 /* Convert a REF to the object referenced. */ 355 356 extern struct value *coerce_ref (struct value *value); 357 358 /* If ARG is an array, convert it to a pointer. 359 If ARG is a function, convert it to a function pointer. 360 361 References are dereferenced. */ 362 363 extern struct value *coerce_array (struct value *value); 364 365 /* 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. */ 368 369 extern int value_bits_valid (const struct value *value, 370 int offset, int length); 371 372 /* Given a value, determine whether the bits starting at OFFSET and 373 extending for LENGTH bits are a synthetic pointer. */ 374 375 extern int value_bits_synthetic_pointer (const struct value *value, 376 int offset, int length); 377 378 /* 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. */ 382 383 extern int value_bytes_available (const struct value *value, 384 int offset, int length); 385 386 /* 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); 389 390 /* Mark VALUE's content bytes starting at OFFSET and extending for 391 LENGTH bytes as unavailable. */ 392 393 extern void mark_value_bytes_unavailable (struct value *value, 394 int offset, int length); 395 396 /* Compare LENGTH bytes of VAL1's contents starting at OFFSET1 with 397 LENGTH bytes of VAL2's contents starting at OFFSET2. 398 399 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: 403 404 int len = TYPE_LENGTH (check_typedef (value_enclosing_type (val))); 405 value_available_contents (val, 0, val, 0, len); 406 407 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: 412 413 offset: 0 4 8 12 16 414 contents: xxxxVVVVxxxxVVZZ 415 416 then: 417 418 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) => 0 424 */ 425 426 extern int value_available_contents_eq (const struct value *val1, int offset1, 427 const struct value *val2, int offset2, 428 int length); 429 430 /* 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. */ 436 437 extern void read_value_memory (struct value *val, int embedded_offset, 438 int stack, CORE_ADDR memaddr, 439 gdb_byte *buffer, size_t length); 440 441 442 443 #include "symtab.h" 444 #include "gdbtypes.h" 445 #include "expression.h" 446 447 struct frame_info; 448 struct fn_field; 449 450 extern void print_address_demangle (struct gdbarch *, CORE_ADDR, 451 struct ui_file *, int); 452 453 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); 456 457 extern LONGEST unpack_long (struct type *type, const gdb_byte *valaddr); 458 extern DOUBLEST unpack_double (struct type *type, const gdb_byte *valaddr, 459 int *invp); 460 extern CORE_ADDR unpack_pointer (struct type *type, const gdb_byte *valaddr); 461 462 extern int unpack_value_bits_as_long (struct type *field_type, 463 const gdb_byte *valaddr, 464 int embedded_offset, int bitpos, 465 int bitsize, 466 const struct value *original_value, 467 LONGEST *result); 468 469 extern LONGEST unpack_field_as_long (struct type *type, 470 const gdb_byte *valaddr, 471 int fieldno); 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); 475 476 extern struct value *value_field_bitfield (struct type *type, int fieldno, 477 const gdb_byte *valaddr, 478 int embedded_offset, 479 const struct value *val); 480 481 extern void pack_long (gdb_byte *buf, struct type *type, LONGEST num); 482 483 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 **); 490 491 extern struct value *value_at (struct type *type, CORE_ADDR addr); 492 extern struct value *value_at_lazy (struct type *type, CORE_ADDR addr); 493 494 extern struct value *value_from_contents_and_address (struct type *, 495 const gdb_byte *, 496 CORE_ADDR); 497 extern struct value *value_from_contents (struct type *, const gdb_byte *); 498 499 extern struct value *default_value_from_register (struct type *type, 500 int regnum, 501 struct frame_info *frame); 502 503 extern void read_frame_register_value (struct value *value, 504 struct frame_info *frame); 505 506 extern struct value *value_from_register (struct type *type, int regnum, 507 struct frame_info *frame); 508 509 extern CORE_ADDR address_from_register (struct type *type, int regnum, 510 struct frame_info *frame); 511 512 extern struct value *value_of_variable (struct symbol *var, 513 const struct block *b); 514 515 extern struct value *address_of_variable (struct symbol *var, struct block *b); 516 517 extern struct value *value_of_register (int regnum, struct frame_info *frame); 518 519 struct value *value_of_register_lazy (struct frame_info *frame, int regnum); 520 521 extern int symbol_read_needs_frame (struct symbol *); 522 523 extern struct value *read_var_value (struct symbol *var, 524 struct frame_info *frame); 525 526 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, 531 int length); 532 extern void value_contents_copy_raw (struct value *dst, int dst_offset, 533 struct value *src, int src_offset, 534 int length); 535 536 extern struct value *allocate_repeat_value (struct type *type, int count); 537 538 extern struct value *value_mark (void); 539 540 extern void value_free_to_mark (struct value *mark); 541 542 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); 548 549 extern struct value *value_array (int lowbound, int highbound, 550 struct value **elemvec); 551 552 extern struct value *value_concat (struct value *arg1, struct value *arg2); 553 554 extern struct value *value_binop (struct value *arg1, struct value *arg2, 555 enum exp_opcode op); 556 557 extern struct value *value_ptradd (struct value *arg1, LONGEST arg2); 558 559 extern LONGEST value_ptrdiff (struct value *arg1, struct value *arg2); 560 561 extern int value_must_coerce_to_target (struct value *arg1); 562 563 extern struct value *value_coerce_to_target (struct value *arg1); 564 565 extern struct value *value_coerce_array (struct value *arg1); 566 567 extern struct value *value_coerce_function (struct value *arg1); 568 569 extern struct value *value_ind (struct value *arg1); 570 571 extern struct value *value_addr (struct value *arg1); 572 573 extern struct value *value_ref (struct value *arg1); 574 575 extern struct value *value_assign (struct value *toval, 576 struct value *fromval); 577 578 extern struct value *value_pos (struct value *arg1); 579 580 extern struct value *value_neg (struct value *arg1); 581 582 extern struct value *value_complement (struct value *arg1); 583 584 extern struct value *value_struct_elt (struct value **argp, 585 struct value **args, 586 const char *name, int *static_memfuncp, 587 const char *err); 588 589 extern struct value *value_aggregate_elt (struct type *curtype, 590 char *name, 591 struct type *expect_type, 592 int want_address, 593 enum noside noside); 594 595 extern struct value *value_static_field (struct type *type, int fieldno); 596 597 extern struct fn_field *value_find_oload_method_list (struct value **, 598 const char *, 599 int, int *, 600 struct type **, int *); 601 602 enum oload_search_type { NON_METHOD, METHOD, BOTH }; 603 604 extern int find_overload_match (struct value **args, int nargs, 605 const char *name, 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); 610 611 extern struct value *value_field (struct value *arg1, int fieldno); 612 613 extern struct value *value_primitive_field (struct value *arg1, int offset, 614 int fieldno, 615 struct type *arg_type); 616 617 618 extern struct type *value_rtti_target_type (struct value *, int *, int *, 619 int *); 620 621 extern struct value *value_full_object (struct value *, struct type *, int, 622 int, int); 623 624 extern struct value *value_cast_pointers (struct type *, struct value *); 625 626 extern struct value *value_cast (struct type *type, struct value *arg2); 627 628 extern struct value *value_reinterpret_cast (struct type *type, 629 struct value *arg); 630 631 extern struct value *value_dynamic_cast (struct type *type, struct value *arg); 632 633 extern struct value *value_zero (struct type *type, enum lval_type lv); 634 635 extern struct value *value_one (struct type *type); 636 637 extern struct value *value_repeat (struct value *arg1, int count); 638 639 extern struct value *value_subscript (struct value *array, LONGEST index); 640 641 extern struct value *value_bitstring_subscript (struct type *type, 642 struct value *bitstring, 643 LONGEST index); 644 645 extern struct value *register_value_being_returned (struct type *valtype, 646 struct regcache *retbuf); 647 648 extern int value_in (struct value *element, struct value *set); 649 650 extern int value_bit_index (struct type *type, const gdb_byte *addr, 651 int index); 652 653 extern int using_struct_return (struct gdbarch *gdbarch, 654 struct type *func_type, 655 struct type *value_type); 656 657 extern struct value *evaluate_expression (struct expression *exp); 658 659 extern struct value *evaluate_type (struct expression *exp); 660 661 extern struct value *evaluate_subexp (struct type *expect_type, 662 struct expression *exp, 663 int *pos, enum noside noside); 664 665 extern struct value *evaluate_subexpression_type (struct expression *exp, 666 int subexp); 667 668 extern void fetch_subexp_value (struct expression *exp, int *pc, 669 struct value **valp, struct value **resultp, 670 struct value **val_chain); 671 672 extern char *extract_field_op (struct expression *exp, int *subexp); 673 674 extern struct value *evaluate_subexp_with_coercion (struct expression *, 675 int *, enum noside); 676 677 extern struct value *parse_and_eval (char *exp); 678 679 extern struct value *parse_to_comma_and_eval (char **expp); 680 681 extern struct type *parse_and_eval_type (char *p, int length); 682 683 extern CORE_ADDR parse_and_eval_address (char *exp); 684 685 extern LONGEST parse_and_eval_long (char *exp); 686 687 extern void unop_promote (const struct language_defn *language, 688 struct gdbarch *gdbarch, 689 struct value **arg1); 690 691 extern void binop_promote (const struct language_defn *language, 692 struct gdbarch *gdbarch, 693 struct value **arg1, struct value **arg2); 694 695 extern struct value *access_value_history (int num); 696 697 extern struct value *value_of_internalvar (struct gdbarch *gdbarch, 698 struct internalvar *var); 699 700 extern int get_internalvar_integer (struct internalvar *var, LONGEST *l); 701 702 extern void set_internalvar (struct internalvar *var, struct value *val); 703 704 extern void set_internalvar_integer (struct internalvar *var, LONGEST l); 705 706 extern void set_internalvar_string (struct internalvar *var, 707 const char *string); 708 709 extern void clear_internalvar (struct internalvar *var); 710 711 extern void set_internalvar_component (struct internalvar *var, 712 int offset, 713 int bitpos, int bitsize, 714 struct value *newvalue); 715 716 extern struct internalvar *lookup_only_internalvar (const char *name); 717 718 extern struct internalvar *create_internalvar (const char *name); 719 720 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); 724 725 extern struct internalvar *lookup_internalvar (const char *name); 726 727 extern int value_equal (struct value *arg1, struct value *arg2); 728 729 extern int value_equal_contents (struct value *arg1, struct value *arg2); 730 731 extern int value_less (struct value *arg1, struct value *arg2); 732 733 extern int value_logical_not (struct value *arg1); 734 735 /* C++ */ 736 737 extern struct value *value_of_this (const struct language_defn *lang); 738 739 extern struct value *value_of_this_silent (const struct language_defn *lang); 740 741 extern struct value *value_x_binop (struct value *arg1, struct value *arg2, 742 enum exp_opcode op, 743 enum exp_opcode otherop, 744 enum noside noside); 745 746 extern struct value *value_x_unop (struct value *arg1, enum exp_opcode op, 747 enum noside noside); 748 749 extern struct value *value_fn_field (struct value **arg1p, struct fn_field *f, 750 int j, struct type *type, int offset); 751 752 extern int binop_types_user_defined_p (enum exp_opcode op, 753 struct type *type1, 754 struct type *type2); 755 756 extern int binop_user_defined_p (enum exp_opcode op, struct value *arg1, 757 struct value *arg2); 758 759 extern int unop_user_defined_p (enum exp_opcode op, struct value *arg1); 760 761 extern int destructor_name_p (const char *name, struct type *type); 762 763 extern void value_incref (struct value *val); 764 765 extern void value_free (struct value *val); 766 767 extern void free_all_values (void); 768 769 extern void free_value_chain (struct value *v); 770 771 extern void release_value (struct value *val); 772 773 extern int record_latest_value (struct value *val); 774 775 extern void modify_field (struct type *type, gdb_byte *addr, 776 LONGEST fieldval, int bitpos, int bitsize); 777 778 extern void type_print (struct type *type, char *varstring, 779 struct ui_file *stream, int show); 780 781 extern char *type_to_string (struct type *type); 782 783 extern gdb_byte *baseclass_addr (struct type *type, int index, 784 gdb_byte *valaddr, 785 struct value **valuep, int *errp); 786 787 extern void print_longest (struct ui_file *stream, int format, 788 int use_local, LONGEST val); 789 790 extern void print_floating (const gdb_byte *valaddr, struct type *type, 791 struct ui_file *stream); 792 793 extern void print_decimal_floating (const gdb_byte *valaddr, struct type *type, 794 struct ui_file *stream); 795 796 extern int value_print (struct value *val, struct ui_file *stream, 797 const struct value_print_options *options); 798 799 extern void value_print_array_elements (struct value *val, 800 struct ui_file *stream, int format, 801 enum val_prettyprint pretty); 802 803 extern struct value *value_release_to_mark (struct value *mark); 804 805 extern int val_print (struct type *type, const gdb_byte *valaddr, 806 int embedded_offset, CORE_ADDR address, 807 struct ui_file *stream, int recurse, 808 const struct value *val, 809 const struct value_print_options *options, 810 const struct language_defn *language); 811 812 extern int common_val_print (struct value *val, 813 struct ui_file *stream, int recurse, 814 const struct value_print_options *options, 815 const struct language_defn *language); 816 817 extern int val_print_string (struct type *elttype, const char *encoding, 818 CORE_ADDR addr, int len, 819 struct ui_file *stream, 820 const struct value_print_options *options); 821 822 extern void print_variable_and_value (const char *name, 823 struct symbol *var, 824 struct frame_info *frame, 825 struct ui_file *stream, 826 int indent); 827 828 extern int check_field (struct type *, const char *); 829 830 extern void typedef_print (struct type *type, struct symbol *news, 831 struct ui_file *stream); 832 833 extern char *internalvar_name (struct internalvar *var); 834 835 extern void preserve_values (struct objfile *); 836 837 /* From values.c */ 838 839 extern struct value *value_copy (struct value *); 840 841 extern struct value *value_non_lval (struct value *); 842 843 extern void preserve_one_value (struct value *, struct objfile *, htab_t); 844 845 /* From valops.c */ 846 847 extern struct value *varying_to_slice (struct value *); 848 849 extern struct value *value_slice (struct value *, int, int); 850 851 extern struct value *value_literal_complex (struct value *, struct value *, 852 struct type *); 853 854 extern struct value *find_function_in_inferior (const char *, 855 struct objfile **); 856 857 extern struct value *value_allocate_space_in_inferior (int); 858 859 extern struct value *value_subscripted_rvalue (struct value *array, 860 LONGEST index, int lowerbound); 861 862 /* User function handler. */ 863 864 typedef struct value *(*internal_function_fn) (struct gdbarch *gdbarch, 865 const struct language_defn *language, 866 void *cookie, 867 int argc, 868 struct value **argv); 869 870 void add_internal_function (const char *name, const char *doc, 871 internal_function_fn handler, 872 void *cookie); 873 874 struct value *call_internal_function (struct gdbarch *gdbarch, 875 const struct language_defn *language, 876 struct value *function, 877 int argc, struct value **argv); 878 879 char *value_internal_function_name (struct value *); 880 881 #endif /* !defined (VALUE_H) */ 882