1 /* Internal type definitions for GDB. 2 3 Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 4 2002, 2003, 2004, 2006, 2007, 2008, 2009, 2010 5 Free Software Foundation, Inc. 6 7 Contributed by Cygnus Support, using pieces from other GDB modules. 8 9 This file is part of GDB. 10 11 This program is free software; you can redistribute it and/or modify 12 it under the terms of the GNU General Public License as published by 13 the Free Software Foundation; either version 3 of the License, or 14 (at your option) any later version. 15 16 This program is distributed in the hope that it will be useful, 17 but WITHOUT ANY WARRANTY; without even the implied warranty of 18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 GNU General Public License for more details. 20 21 You should have received a copy of the GNU General Public License 22 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 23 24 #if !defined (GDBTYPES_H) 25 #define GDBTYPES_H 1 26 27 #include "hashtab.h" 28 29 /* Forward declarations for prototypes. */ 30 struct field; 31 struct block; 32 struct value_print_options; 33 struct language_defn; 34 35 /* Some macros for char-based bitfields. */ 36 37 #define B_SET(a,x) ((a)[(x)>>3] |= (1 << ((x)&7))) 38 #define B_CLR(a,x) ((a)[(x)>>3] &= ~(1 << ((x)&7))) 39 #define B_TST(a,x) ((a)[(x)>>3] & (1 << ((x)&7))) 40 #define B_TYPE unsigned char 41 #define B_BYTES(x) ( 1 + ((x)>>3) ) 42 #define B_CLRALL(a,x) memset ((a), 0, B_BYTES(x)) 43 44 /* Different kinds of data types are distinguished by the `code' field. */ 45 46 enum type_code 47 { 48 TYPE_CODE_UNDEF, /* Not used; catches errors */ 49 TYPE_CODE_PTR, /* Pointer type */ 50 51 /* Array type with lower & upper bounds. 52 53 Regardless of the language, GDB represents multidimensional 54 array types the way C does: as arrays of arrays. So an 55 instance of a GDB array type T can always be seen as a series 56 of instances of TYPE_TARGET_TYPE (T) laid out sequentially in 57 memory. 58 59 Row-major languages like C lay out multi-dimensional arrays so 60 that incrementing the rightmost index in a subscripting 61 expression results in the smallest change in the address of the 62 element referred to. Column-major languages like Fortran lay 63 them out so that incrementing the leftmost index results in the 64 smallest change. 65 66 This means that, in column-major languages, working our way 67 from type to target type corresponds to working through indices 68 from right to left, not left to right. */ 69 TYPE_CODE_ARRAY, 70 71 TYPE_CODE_STRUCT, /* C struct or Pascal record */ 72 TYPE_CODE_UNION, /* C union or Pascal variant part */ 73 TYPE_CODE_ENUM, /* Enumeration type */ 74 TYPE_CODE_FLAGS, /* Bit flags type */ 75 TYPE_CODE_FUNC, /* Function type */ 76 TYPE_CODE_INT, /* Integer type */ 77 78 /* Floating type. This is *NOT* a complex type. Beware, there are parts 79 of GDB which bogusly assume that TYPE_CODE_FLT can mean complex. */ 80 TYPE_CODE_FLT, 81 82 /* Void type. The length field specifies the length (probably always 83 one) which is used in pointer arithmetic involving pointers to 84 this type, but actually dereferencing such a pointer is invalid; 85 a void type has no length and no actual representation in memory 86 or registers. A pointer to a void type is a generic pointer. */ 87 TYPE_CODE_VOID, 88 89 TYPE_CODE_SET, /* Pascal sets */ 90 TYPE_CODE_RANGE, /* Range (integers within spec'd bounds) */ 91 92 /* A string type which is like an array of character but prints 93 differently (at least for (the deleted) CHILL). It does not 94 contain a length field as Pascal strings (for many Pascals, 95 anyway) do; if we want to deal with such strings, we should use 96 a new type code. */ 97 TYPE_CODE_STRING, 98 99 /* String of bits; like TYPE_CODE_SET but prints differently (at 100 least for (the deleted) CHILL). */ 101 TYPE_CODE_BITSTRING, 102 103 /* Unknown type. The length field is valid if we were able to 104 deduce that much about the type, or 0 if we don't even know that. */ 105 TYPE_CODE_ERROR, 106 107 /* C++ */ 108 TYPE_CODE_METHOD, /* Method type */ 109 110 /* Pointer-to-member-function type. This describes how to access a 111 particular member function of a class (possibly a virtual 112 member function). The representation may vary between different 113 C++ ABIs. */ 114 TYPE_CODE_METHODPTR, 115 116 /* Pointer-to-member type. This is the offset within a class to some 117 particular data member. The only currently supported representation 118 uses an unbiased offset, with -1 representing NULL; this is used 119 by the Itanium C++ ABI (used by GCC on all platforms). */ 120 TYPE_CODE_MEMBERPTR, 121 122 TYPE_CODE_REF, /* C++ Reference types */ 123 124 TYPE_CODE_CHAR, /* *real* character type */ 125 126 /* Boolean type. 0 is false, 1 is true, and other values are non-boolean 127 (e.g. FORTRAN "logical" used as unsigned int). */ 128 TYPE_CODE_BOOL, 129 130 /* Fortran */ 131 TYPE_CODE_COMPLEX, /* Complex float */ 132 133 TYPE_CODE_TYPEDEF, 134 135 TYPE_CODE_NAMESPACE, /* C++ namespace. */ 136 137 TYPE_CODE_DECFLOAT, /* Decimal floating point. */ 138 139 TYPE_CODE_MODULE, /* Fortran module. */ 140 141 /* Internal function type. */ 142 TYPE_CODE_INTERNAL_FUNCTION 143 }; 144 145 /* For now allow source to use TYPE_CODE_CLASS for C++ classes, as an 146 alias for TYPE_CODE_STRUCT. This is for DWARF, which has a distinct 147 "class" attribute. Perhaps we should actually have a separate TYPE_CODE 148 so that we can print "class" or "struct" depending on what the debug 149 info said. It's not clear we should bother. */ 150 151 #define TYPE_CODE_CLASS TYPE_CODE_STRUCT 152 153 /* Some constants representing each bit field in the main_type. See 154 the bit-field-specific macros, below, for documentation of each 155 constant in this enum. These enum values are only used with 156 init_type. Note that the values are chosen not to conflict with 157 type_instance_flag_value; this lets init_type error-check its 158 input. */ 159 160 enum type_flag_value 161 { 162 TYPE_FLAG_UNSIGNED = (1 << 6), 163 TYPE_FLAG_NOSIGN = (1 << 7), 164 TYPE_FLAG_STUB = (1 << 8), 165 TYPE_FLAG_TARGET_STUB = (1 << 9), 166 TYPE_FLAG_STATIC = (1 << 10), 167 TYPE_FLAG_PROTOTYPED = (1 << 11), 168 TYPE_FLAG_INCOMPLETE = (1 << 12), 169 TYPE_FLAG_VARARGS = (1 << 13), 170 TYPE_FLAG_VECTOR = (1 << 14), 171 TYPE_FLAG_FIXED_INSTANCE = (1 << 15), 172 TYPE_FLAG_STUB_SUPPORTED = (1 << 16), 173 TYPE_FLAG_NOTTEXT = (1 << 17), 174 175 /* Used for error-checking. */ 176 TYPE_FLAG_MIN = TYPE_FLAG_UNSIGNED 177 }; 178 179 /* Some bits for the type's instance_flags word. See the macros below 180 for documentation on each bit. Note that if you add a value here, 181 you must update the enum type_flag_value as well. */ 182 enum type_instance_flag_value 183 { 184 TYPE_INSTANCE_FLAG_CONST = (1 << 0), 185 TYPE_INSTANCE_FLAG_VOLATILE = (1 << 1), 186 TYPE_INSTANCE_FLAG_CODE_SPACE = (1 << 2), 187 TYPE_INSTANCE_FLAG_DATA_SPACE = (1 << 3), 188 TYPE_INSTANCE_FLAG_ADDRESS_CLASS_1 = (1 << 4), 189 TYPE_INSTANCE_FLAG_ADDRESS_CLASS_2 = (1 << 5) 190 }; 191 192 /* Unsigned integer type. If this is not set for a TYPE_CODE_INT, the 193 type is signed (unless TYPE_FLAG_NOSIGN (below) is set). */ 194 195 #define TYPE_UNSIGNED(t) (TYPE_MAIN_TYPE (t)->flag_unsigned) 196 197 /* No sign for this type. In C++, "char", "signed char", and "unsigned 198 char" are distinct types; so we need an extra flag to indicate the 199 absence of a sign! */ 200 201 #define TYPE_NOSIGN(t) (TYPE_MAIN_TYPE (t)->flag_nosign) 202 203 /* This appears in a type's flags word if it is a stub type (e.g., if 204 someone referenced a type that wasn't defined in a source file 205 via (struct sir_not_appearing_in_this_film *)). */ 206 207 #define TYPE_STUB(t) (TYPE_MAIN_TYPE (t)->flag_stub) 208 209 /* The target type of this type is a stub type, and this type needs to 210 be updated if it gets un-stubbed in check_typedef. 211 Used for arrays and ranges, in which TYPE_LENGTH of the array/range 212 gets set based on the TYPE_LENGTH of the target type. 213 Also, set for TYPE_CODE_TYPEDEF. */ 214 215 #define TYPE_TARGET_STUB(t) (TYPE_MAIN_TYPE (t)->flag_target_stub) 216 217 /* Static type. If this is set, the corresponding type had 218 * a static modifier. 219 * Note: This may be unnecessary, since static data members 220 * are indicated by other means (bitpos == -1) 221 */ 222 223 #define TYPE_STATIC(t) (TYPE_MAIN_TYPE (t)->flag_static) 224 225 /* This is a function type which appears to have a prototype. We need this 226 for function calls in order to tell us if it's necessary to coerce the args, 227 or to just do the standard conversions. This is used with a short field. */ 228 229 #define TYPE_PROTOTYPED(t) (TYPE_MAIN_TYPE (t)->flag_prototyped) 230 231 /* This flag is used to indicate that processing for this type 232 is incomplete. 233 234 (Mostly intended for HP platforms, where class methods, for 235 instance, can be encountered before their classes in the debug 236 info; the incomplete type has to be marked so that the class and 237 the method can be assigned correct types.) */ 238 239 #define TYPE_INCOMPLETE(t) (TYPE_MAIN_TYPE (t)->flag_incomplete) 240 241 /* FIXME drow/2002-06-03: Only used for methods, but applies as well 242 to functions. */ 243 244 #define TYPE_VARARGS(t) (TYPE_MAIN_TYPE (t)->flag_varargs) 245 246 /* Identify a vector type. Gcc is handling this by adding an extra 247 attribute to the array type. We slurp that in as a new flag of a 248 type. This is used only in dwarf2read.c. */ 249 #define TYPE_VECTOR(t) (TYPE_MAIN_TYPE (t)->flag_vector) 250 251 /* The debugging formats (especially STABS) do not contain enough information 252 to represent all Ada types---especially those whose size depends on 253 dynamic quantities. Therefore, the GNAT Ada compiler includes 254 extra information in the form of additional type definitions 255 connected by naming conventions. This flag indicates that the 256 type is an ordinary (unencoded) GDB type that has been created from 257 the necessary run-time information, and does not need further 258 interpretation. Optionally marks ordinary, fixed-size GDB type. */ 259 260 #define TYPE_FIXED_INSTANCE(t) (TYPE_MAIN_TYPE (t)->flag_fixed_instance) 261 262 /* This debug target supports TYPE_STUB(t). In the unsupported case we have to 263 rely on NFIELDS to be zero etc., see TYPE_IS_OPAQUE (). 264 TYPE_STUB(t) with !TYPE_STUB_SUPPORTED(t) may exist if we only guessed 265 the TYPE_STUB(t) value (see dwarfread.c). */ 266 267 #define TYPE_STUB_SUPPORTED(t) (TYPE_MAIN_TYPE (t)->flag_stub_supported) 268 269 /* Not textual. By default, GDB treats all single byte integers as 270 characters (or elements of strings) unless this flag is set. */ 271 272 #define TYPE_NOTTEXT(t) (TYPE_MAIN_TYPE (t)->flag_nottext) 273 274 /* Type owner. If TYPE_OBJFILE_OWNED is true, the type is owned by 275 the objfile retrieved as TYPE_OBJFILE. Otherweise, the type is 276 owned by an architecture; TYPE_OBJFILE is NULL in this case. */ 277 278 #define TYPE_OBJFILE_OWNED(t) (TYPE_MAIN_TYPE (t)->flag_objfile_owned) 279 #define TYPE_OWNER(t) TYPE_MAIN_TYPE(t)->owner 280 #define TYPE_OBJFILE(t) (TYPE_OBJFILE_OWNED(t)? TYPE_OWNER(t).objfile : NULL) 281 282 /* True if this type was declared using the "class" keyword. This is 283 only valid for C++ structure types, and only used for displaying 284 the type. If false, the structure was declared as a "struct". */ 285 286 #define TYPE_DECLARED_CLASS(t) (TYPE_MAIN_TYPE (t)->flag_declared_class) 287 288 /* Constant type. If this is set, the corresponding type has a 289 * const modifier. 290 */ 291 292 #define TYPE_CONST(t) (TYPE_INSTANCE_FLAGS (t) & TYPE_INSTANCE_FLAG_CONST) 293 294 /* Volatile type. If this is set, the corresponding type has a 295 * volatile modifier. 296 */ 297 298 #define TYPE_VOLATILE(t) (TYPE_INSTANCE_FLAGS (t) & TYPE_INSTANCE_FLAG_VOLATILE) 299 300 /* Instruction-space delimited type. This is for Harvard architectures 301 which have separate instruction and data address spaces (and perhaps 302 others). 303 304 GDB usually defines a flat address space that is a superset of the 305 architecture's two (or more) address spaces, but this is an extension 306 of the architecture's model. 307 308 If TYPE_FLAG_INST is set, an object of the corresponding type 309 resides in instruction memory, even if its address (in the extended 310 flat address space) does not reflect this. 311 312 Similarly, if TYPE_FLAG_DATA is set, then an object of the 313 corresponding type resides in the data memory space, even if 314 this is not indicated by its (flat address space) address. 315 316 If neither flag is set, the default space for functions / methods 317 is instruction space, and for data objects is data memory. */ 318 319 #define TYPE_CODE_SPACE(t) \ 320 (TYPE_INSTANCE_FLAGS (t) & TYPE_INSTANCE_FLAG_CODE_SPACE) 321 322 #define TYPE_DATA_SPACE(t) \ 323 (TYPE_INSTANCE_FLAGS (t) & TYPE_INSTANCE_FLAG_DATA_SPACE) 324 325 /* Address class flags. Some environments provide for pointers whose 326 size is different from that of a normal pointer or address types 327 where the bits are interpreted differently than normal addresses. The 328 TYPE_FLAG_ADDRESS_CLASS_n flags may be used in target specific 329 ways to represent these different types of address classes. */ 330 #define TYPE_ADDRESS_CLASS_1(t) (TYPE_INSTANCE_FLAGS(t) \ 331 & TYPE_INSTANCE_FLAG_ADDRESS_CLASS_1) 332 #define TYPE_ADDRESS_CLASS_2(t) (TYPE_INSTANCE_FLAGS(t) \ 333 & TYPE_INSTANCE_FLAG_ADDRESS_CLASS_2) 334 #define TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL \ 335 (TYPE_INSTANCE_FLAG_ADDRESS_CLASS_1 | TYPE_INSTANCE_FLAG_ADDRESS_CLASS_2) 336 #define TYPE_ADDRESS_CLASS_ALL(t) (TYPE_INSTANCE_FLAGS(t) \ 337 & TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) 338 339 /* Determine which field of the union main_type.fields[x].loc is used. */ 340 341 enum field_loc_kind 342 { 343 FIELD_LOC_KIND_BITPOS, /* bitpos */ 344 FIELD_LOC_KIND_PHYSADDR, /* physaddr */ 345 FIELD_LOC_KIND_PHYSNAME /* physname */ 346 }; 347 348 /* A discriminant to determine which field in the main_type.type_specific 349 union is being used, if any. 350 351 For types such as TYPE_CODE_FLT or TYPE_CODE_FUNC, the use of this 352 discriminant is really redundant, as we know from the type code 353 which field is going to be used. As such, it would be possible to 354 reduce the size of this enum in order to save a bit or two for 355 other fields of struct main_type. But, since we still have extra 356 room , and for the sake of clarity and consistency, we treat all fields 357 of the union the same way. */ 358 359 enum type_specific_kind 360 { 361 TYPE_SPECIFIC_NONE, 362 TYPE_SPECIFIC_CPLUS_STUFF, 363 TYPE_SPECIFIC_GNAT_STUFF, 364 TYPE_SPECIFIC_FLOATFORMAT, 365 TYPE_SPECIFIC_CALLING_CONVENTION 366 }; 367 368 /* This structure is space-critical. 369 Its layout has been tweaked to reduce the space used. */ 370 371 struct main_type 372 { 373 /* Code for kind of type */ 374 375 ENUM_BITFIELD(type_code) code : 8; 376 377 /* Flags about this type. These fields appear at this location 378 because they packs nicely here. See the TYPE_* macros for 379 documentation about these fields. */ 380 381 unsigned int flag_unsigned : 1; 382 unsigned int flag_nosign : 1; 383 unsigned int flag_stub : 1; 384 unsigned int flag_target_stub : 1; 385 unsigned int flag_static : 1; 386 unsigned int flag_prototyped : 1; 387 unsigned int flag_incomplete : 1; 388 unsigned int flag_varargs : 1; 389 unsigned int flag_vector : 1; 390 unsigned int flag_stub_supported : 1; 391 unsigned int flag_nottext : 1; 392 unsigned int flag_fixed_instance : 1; 393 unsigned int flag_objfile_owned : 1; 394 /* True if this type was declared with "class" rather than 395 "struct". */ 396 unsigned int flag_declared_class : 1; 397 398 /* A discriminant telling us which field of the type_specific union 399 is being used for this type, if any. */ 400 ENUM_BITFIELD(type_specific_kind) type_specific_field : 3; 401 402 /* Number of fields described for this type. This field appears at 403 this location because it packs nicely here. */ 404 405 short nfields; 406 407 /* Field number of the virtual function table pointer in 408 VPTR_BASETYPE. If -1, we were unable to find the virtual 409 function table pointer in initial symbol reading, and 410 get_vptr_fieldno should be called to find it if possible. 411 get_vptr_fieldno will update this field if possible. 412 Otherwise the value is left at -1. 413 414 Unused if this type does not have virtual functions. 415 416 This field appears at this location because it packs nicely here. */ 417 418 short vptr_fieldno; 419 420 /* Name of this type, or NULL if none. 421 422 This is used for printing only, except by poorly designed C++ code. 423 For looking up a name, look for a symbol in the VAR_DOMAIN. */ 424 425 char *name; 426 427 /* Tag name for this type, or NULL if none. This means that the 428 name of the type consists of a keyword followed by the tag name. 429 Which keyword is determined by the type code ("struct" for 430 TYPE_CODE_STRUCT, etc.). As far as I know C/C++ are the only languages 431 with this feature. 432 433 This is used for printing only, except by poorly designed C++ code. 434 For looking up a name, look for a symbol in the STRUCT_DOMAIN. 435 One more legitimate use is that if TYPE_FLAG_STUB is set, this is 436 the name to use to look for definitions in other files. */ 437 438 char *tag_name; 439 440 /* Every type is now associated with a particular objfile, and the 441 type is allocated on the objfile_obstack for that objfile. One problem 442 however, is that there are times when gdb allocates new types while 443 it is not in the process of reading symbols from a particular objfile. 444 Fortunately, these happen when the type being created is a derived 445 type of an existing type, such as in lookup_pointer_type(). So 446 we can just allocate the new type using the same objfile as the 447 existing type, but to do this we need a backpointer to the objfile 448 from the existing type. Yes this is somewhat ugly, but without 449 major overhaul of the internal type system, it can't be avoided 450 for now. */ 451 452 union type_owner 453 { 454 struct objfile *objfile; 455 struct gdbarch *gdbarch; 456 } owner; 457 458 /* For a pointer type, describes the type of object pointed to. 459 For an array type, describes the type of the elements. 460 For a function or method type, describes the type of the return value. 461 For a range type, describes the type of the full range. 462 For a complex type, describes the type of each coordinate. 463 For a special record or union type encoding a dynamic-sized type 464 in GNAT, a memoized pointer to a corresponding static version of 465 the type. 466 Unused otherwise. */ 467 468 struct type *target_type; 469 470 /* For structure and union types, a description of each field. 471 For set and pascal array types, there is one "field", 472 whose type is the domain type of the set or array. 473 For range types, there are two "fields", 474 the minimum and maximum values (both inclusive). 475 For enum types, each possible value is described by one "field". 476 For a function or method type, a "field" for each parameter. 477 For C++ classes, there is one field for each base class (if it is 478 a derived class) plus one field for each class data member. Member 479 functions are recorded elsewhere. 480 481 Using a pointer to a separate array of fields 482 allows all types to have the same size, which is useful 483 because we can allocate the space for a type before 484 we know what to put in it. */ 485 486 union 487 { 488 struct field 489 { 490 union field_location 491 { 492 /* Position of this field, counting in bits from start of 493 containing structure. 494 For gdbarch_bits_big_endian=1 targets, it is the bit offset to the MSB. 495 For gdbarch_bits_big_endian=0 targets, it is the bit offset to the LSB. 496 For a range bound or enum value, this is the value itself. */ 497 498 int bitpos; 499 500 /* For a static field, if TYPE_FIELD_STATIC_HAS_ADDR then physaddr 501 is the location (in the target) of the static field. 502 Otherwise, physname is the mangled label of the static field. */ 503 504 CORE_ADDR physaddr; 505 char *physname; 506 } 507 loc; 508 509 /* For a function or member type, this is 1 if the argument is marked 510 artificial. Artificial arguments should not be shown to the 511 user. For TYPE_CODE_RANGE it is set if the specific bound is not 512 defined. */ 513 unsigned int artificial : 1; 514 515 /* Discriminant for union field_location. */ 516 ENUM_BITFIELD(field_loc_kind) loc_kind : 2; 517 518 /* Size of this field, in bits, or zero if not packed. 519 If non-zero in an array type, indicates the element size in 520 bits (used only in Ada at the moment). 521 For an unpacked field, the field's type's length 522 says how many bytes the field occupies. */ 523 524 unsigned int bitsize : 29; 525 526 /* In a struct or union type, type of this field. 527 In a function or member type, type of this argument. 528 In an array type, the domain-type of the array. */ 529 530 struct type *type; 531 532 /* Name of field, value or argument. 533 NULL for range bounds, array domains, and member function 534 arguments. */ 535 536 char *name; 537 } *fields; 538 539 /* Union member used for range types. */ 540 541 struct range_bounds 542 { 543 /* Low bound of range. */ 544 545 LONGEST low; 546 547 /* High bound of range. */ 548 549 LONGEST high; 550 551 /* Flags indicating whether the values of low and high are 552 valid. When true, the respective range value is 553 undefined. Currently used only for FORTRAN arrays. */ 554 555 char low_undefined; 556 char high_undefined; 557 558 } *bounds; 559 560 } flds_bnds; 561 562 /* For types with virtual functions (TYPE_CODE_STRUCT), VPTR_BASETYPE 563 is the base class which defined the virtual function table pointer. 564 565 For types that are pointer to member types (TYPE_CODE_METHODPTR, 566 TYPE_CODE_MEMBERPTR), VPTR_BASETYPE is the type that this pointer 567 is a member of. 568 569 For method types (TYPE_CODE_METHOD), VPTR_BASETYPE is the aggregate 570 type that contains the method. 571 572 Unused otherwise. */ 573 574 struct type *vptr_basetype; 575 576 /* Slot to point to additional language-specific fields of this type. */ 577 578 union type_specific 579 { 580 /* CPLUS_STUFF is for TYPE_CODE_STRUCT. It is initialized to point to 581 cplus_struct_default, a default static instance of a struct 582 cplus_struct_type. */ 583 584 struct cplus_struct_type *cplus_stuff; 585 586 /* GNAT_STUFF is for types for which the GNAT Ada compiler 587 provides additional information. */ 588 struct gnat_aux_type *gnat_stuff; 589 590 /* FLOATFORMAT is for TYPE_CODE_FLT. It is a pointer to two 591 floatformat objects that describe the floating-point value 592 that resides within the type. The first is for big endian 593 targets and the second is for little endian targets. */ 594 595 const struct floatformat **floatformat; 596 597 /* For TYPE_CODE_FUNC types, the calling convention for targets 598 supporting multiple ABIs. Right now this is only fetched from 599 the Dwarf-2 DW_AT_calling_convention attribute. */ 600 unsigned calling_convention; 601 } type_specific; 602 }; 603 604 /* A ``struct type'' describes a particular instance of a type, with 605 some particular qualification. */ 606 struct type 607 { 608 /* Type that is a pointer to this type. 609 NULL if no such pointer-to type is known yet. 610 The debugger may add the address of such a type 611 if it has to construct one later. */ 612 613 struct type *pointer_type; 614 615 /* C++: also need a reference type. */ 616 617 struct type *reference_type; 618 619 /* Variant chain. This points to a type that differs from this one only 620 in qualifiers and length. Currently, the possible qualifiers are 621 const, volatile, code-space, data-space, and address class. The 622 length may differ only when one of the address class flags are set. 623 The variants are linked in a circular ring and share MAIN_TYPE. */ 624 struct type *chain; 625 626 /* Flags specific to this instance of the type, indicating where 627 on the ring we are. */ 628 int instance_flags; 629 630 /* Length of storage for a value of this type. This is what 631 sizeof(type) would return; use it for address arithmetic, 632 memory reads and writes, etc. This size includes padding. For 633 example, an i386 extended-precision floating point value really 634 only occupies ten bytes, but most ABI's declare its size to be 635 12 bytes, to preserve alignment. A `struct type' representing 636 such a floating-point type would have a `length' value of 12, 637 even though the last two bytes are unused. 638 639 There's a bit of a host/target mess here, if you're concerned 640 about machines whose bytes aren't eight bits long, or who don't 641 have byte-addressed memory. Various places pass this to memcpy 642 and such, meaning it must be in units of host bytes. Various 643 other places expect they can calculate addresses by adding it 644 and such, meaning it must be in units of target bytes. For 645 some DSP targets, in which HOST_CHAR_BIT will (presumably) be 8 646 and TARGET_CHAR_BIT will be (say) 32, this is a problem. 647 648 One fix would be to make this field in bits (requiring that it 649 always be a multiple of HOST_CHAR_BIT and TARGET_CHAR_BIT) --- 650 the other choice would be to make it consistently in units of 651 HOST_CHAR_BIT. However, this would still fail to address 652 machines based on a ternary or decimal representation. */ 653 654 unsigned length; 655 656 /* Core type, shared by a group of qualified types. */ 657 struct main_type *main_type; 658 }; 659 660 #define NULL_TYPE ((struct type *) 0) 661 662 /* C++ language-specific information for TYPE_CODE_STRUCT and TYPE_CODE_UNION 663 nodes. */ 664 665 struct cplus_struct_type 666 { 667 /* Number of base classes this type derives from. The baseclasses are 668 stored in the first N_BASECLASSES fields (i.e. the `fields' field of 669 the struct type). I think only the `type' field of such a field has 670 any meaning. */ 671 672 short n_baseclasses; 673 674 /* Number of methods with unique names. All overloaded methods with 675 the same name count only once. */ 676 677 short nfn_fields; 678 679 /* Number of methods described for this type, not including the 680 methods that it derives from. */ 681 682 short nfn_fields_total; 683 684 /* One if this struct is a dynamic class, as defined by the 685 Itanium C++ ABI: if it requires a virtual table pointer, 686 because it or any of its base classes have one or more virtual 687 member functions or virtual base classes. Minus one if not 688 dynamic. Zero if not yet computed. */ 689 int is_dynamic : 2; 690 691 /* For derived classes, the number of base classes is given by n_baseclasses 692 and virtual_field_bits is a bit vector containing one bit per base class. 693 If the base class is virtual, the corresponding bit will be set. 694 I.E, given: 695 696 class A{}; 697 class B{}; 698 class C : public B, public virtual A {}; 699 700 B is a baseclass of C; A is a virtual baseclass for C. 701 This is a C++ 2.0 language feature. */ 702 703 B_TYPE *virtual_field_bits; 704 705 /* For classes with private fields, the number of fields is given by 706 nfields and private_field_bits is a bit vector containing one bit 707 per field. 708 If the field is private, the corresponding bit will be set. */ 709 710 B_TYPE *private_field_bits; 711 712 /* For classes with protected fields, the number of fields is given by 713 nfields and protected_field_bits is a bit vector containing one bit 714 per field. 715 If the field is private, the corresponding bit will be set. */ 716 717 B_TYPE *protected_field_bits; 718 719 /* for classes with fields to be ignored, either this is optimized out 720 or this field has length 0 */ 721 722 B_TYPE *ignore_field_bits; 723 724 /* For classes, structures, and unions, a description of each field, 725 which consists of an overloaded name, followed by the types of 726 arguments that the method expects, and then the name after it 727 has been renamed to make it distinct. 728 729 fn_fieldlists points to an array of nfn_fields of these. */ 730 731 struct fn_fieldlist 732 { 733 734 /* The overloaded name. */ 735 736 char *name; 737 738 /* The number of methods with this name. */ 739 740 int length; 741 742 /* The list of methods. */ 743 744 struct fn_field 745 { 746 747 /* If is_stub is clear, this is the mangled name which we can 748 look up to find the address of the method (FIXME: it would 749 be cleaner to have a pointer to the struct symbol here 750 instead). */ 751 752 /* If is_stub is set, this is the portion of the mangled 753 name which specifies the arguments. For example, "ii", 754 if there are two int arguments, or "" if there are no 755 arguments. See gdb_mangle_name for the conversion from this 756 format to the one used if is_stub is clear. */ 757 758 char *physname; 759 760 /* The function type for the method. 761 (This comment used to say "The return value of the method", 762 but that's wrong. The function type 763 is expected here, i.e. something with TYPE_CODE_FUNC, 764 and *not* the return-value type). */ 765 766 struct type *type; 767 768 /* For virtual functions. 769 First baseclass that defines this virtual function. */ 770 771 struct type *fcontext; 772 773 /* Attributes. */ 774 775 unsigned int is_const:1; 776 unsigned int is_volatile:1; 777 unsigned int is_private:1; 778 unsigned int is_protected:1; 779 unsigned int is_public:1; 780 unsigned int is_abstract:1; 781 unsigned int is_static:1; 782 unsigned int is_final:1; 783 unsigned int is_synchronized:1; 784 unsigned int is_native:1; 785 unsigned int is_artificial:1; 786 787 /* A stub method only has some fields valid (but they are enough 788 to reconstruct the rest of the fields). */ 789 unsigned int is_stub:1; 790 791 /* Unused. */ 792 unsigned int dummy:4; 793 794 /* Index into that baseclass's virtual function table, 795 minus 2; else if static: VOFFSET_STATIC; else: 0. */ 796 797 unsigned int voffset:16; 798 799 #define VOFFSET_STATIC 1 800 801 } 802 *fn_fields; 803 804 } 805 *fn_fieldlists; 806 807 /* Pointer to information about enclosing scope, if this is a 808 * local type. If it is not a local type, this is NULL 809 */ 810 struct local_type_info 811 { 812 char *file; 813 int line; 814 } 815 *localtype_ptr; 816 817 /* typedefs defined inside this class. TYPEDEF_FIELD points to an array of 818 TYPEDEF_FIELD_COUNT elements. */ 819 struct typedef_field 820 { 821 /* Unqualified name to be prefixed by owning class qualified name. */ 822 const char *name; 823 824 /* Type this typedef named NAME represents. */ 825 struct type *type; 826 } 827 *typedef_field; 828 unsigned typedef_field_count; 829 }; 830 831 /* Struct used in computing virtual base list */ 832 struct vbase 833 { 834 struct type *vbasetype; /* pointer to virtual base */ 835 struct vbase *next; /* next in chain */ 836 }; 837 838 /* Struct used for ranking a function for overload resolution */ 839 struct badness_vector 840 { 841 int length; 842 int *rank; 843 }; 844 845 /* GNAT Ada-specific information for various Ada types. */ 846 struct gnat_aux_type 847 { 848 /* Parallel type used to encode information about dynamic types 849 used in Ada (such as variant records, variable-size array, 850 etc). */ 851 struct type* descriptive_type; 852 }; 853 854 /* The default value of TYPE_CPLUS_SPECIFIC(T) points to the 855 this shared static structure. */ 856 857 extern const struct cplus_struct_type cplus_struct_default; 858 859 extern void allocate_cplus_struct_type (struct type *); 860 861 #define INIT_CPLUS_SPECIFIC(type) \ 862 (TYPE_SPECIFIC_FIELD (type) = TYPE_SPECIFIC_CPLUS_STUFF, \ 863 TYPE_RAW_CPLUS_SPECIFIC (type) = (struct cplus_struct_type*) &cplus_struct_default) 864 865 #define ALLOCATE_CPLUS_STRUCT_TYPE(type) allocate_cplus_struct_type (type) 866 867 #define HAVE_CPLUS_STRUCT(type) \ 868 (TYPE_SPECIFIC_FIELD (type) == TYPE_SPECIFIC_CPLUS_STUFF \ 869 && TYPE_RAW_CPLUS_SPECIFIC (type) != &cplus_struct_default) 870 871 extern const struct gnat_aux_type gnat_aux_default; 872 873 extern void allocate_gnat_aux_type (struct type *); 874 875 #define INIT_GNAT_SPECIFIC(type) \ 876 (TYPE_SPECIFIC_FIELD (type) = TYPE_SPECIFIC_GNAT_STUFF, \ 877 TYPE_GNAT_SPECIFIC (type) = (struct gnat_aux_type *) &gnat_aux_default) 878 #define ALLOCATE_GNAT_AUX_TYPE(type) allocate_gnat_aux_type (type) 879 /* A macro that returns non-zero if the type-specific data should be 880 read as "gnat-stuff". */ 881 #define HAVE_GNAT_AUX_INFO(type) \ 882 (TYPE_SPECIFIC_FIELD (type) == TYPE_SPECIFIC_GNAT_STUFF) 883 884 #define TYPE_INSTANCE_FLAGS(thistype) (thistype)->instance_flags 885 #define TYPE_MAIN_TYPE(thistype) (thistype)->main_type 886 #define TYPE_NAME(thistype) TYPE_MAIN_TYPE(thistype)->name 887 #define TYPE_TAG_NAME(type) TYPE_MAIN_TYPE(type)->tag_name 888 #define TYPE_TARGET_TYPE(thistype) TYPE_MAIN_TYPE(thistype)->target_type 889 #define TYPE_POINTER_TYPE(thistype) (thistype)->pointer_type 890 #define TYPE_REFERENCE_TYPE(thistype) (thistype)->reference_type 891 #define TYPE_CHAIN(thistype) (thistype)->chain 892 /* Note that if thistype is a TYPEDEF type, you have to call check_typedef. 893 But check_typedef does set the TYPE_LENGTH of the TYPEDEF type, 894 so you only have to call check_typedef once. Since allocate_value 895 calls check_typedef, TYPE_LENGTH (VALUE_TYPE (X)) is safe. */ 896 #define TYPE_LENGTH(thistype) (thistype)->length 897 /* Note that TYPE_CODE can be TYPE_CODE_TYPEDEF, so if you want the real 898 type, you need to do TYPE_CODE (check_type (this_type)). */ 899 #define TYPE_CODE(thistype) TYPE_MAIN_TYPE(thistype)->code 900 #define TYPE_NFIELDS(thistype) TYPE_MAIN_TYPE(thistype)->nfields 901 #define TYPE_FIELDS(thistype) TYPE_MAIN_TYPE(thistype)->flds_bnds.fields 902 903 #define TYPE_INDEX_TYPE(type) TYPE_FIELD_TYPE (type, 0) 904 #define TYPE_RANGE_DATA(thistype) TYPE_MAIN_TYPE(thistype)->flds_bnds.bounds 905 #define TYPE_LOW_BOUND(range_type) TYPE_RANGE_DATA(range_type)->low 906 #define TYPE_HIGH_BOUND(range_type) TYPE_RANGE_DATA(range_type)->high 907 #define TYPE_LOW_BOUND_UNDEFINED(range_type) \ 908 TYPE_RANGE_DATA(range_type)->low_undefined 909 #define TYPE_HIGH_BOUND_UNDEFINED(range_type) \ 910 TYPE_RANGE_DATA(range_type)->high_undefined 911 912 /* Moto-specific stuff for FORTRAN arrays */ 913 914 #define TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED(arraytype) \ 915 TYPE_HIGH_BOUND_UNDEFINED(TYPE_INDEX_TYPE(arraytype)) 916 #define TYPE_ARRAY_LOWER_BOUND_IS_UNDEFINED(arraytype) \ 917 TYPE_LOW_BOUND_UNDEFINED(TYPE_INDEX_TYPE(arraytype)) 918 919 #define TYPE_ARRAY_UPPER_BOUND_VALUE(arraytype) \ 920 (TYPE_HIGH_BOUND(TYPE_INDEX_TYPE((arraytype)))) 921 922 #define TYPE_ARRAY_LOWER_BOUND_VALUE(arraytype) \ 923 (TYPE_LOW_BOUND(TYPE_INDEX_TYPE((arraytype)))) 924 925 /* C++ */ 926 927 #define TYPE_VPTR_BASETYPE(thistype) TYPE_MAIN_TYPE(thistype)->vptr_basetype 928 #define TYPE_DOMAIN_TYPE(thistype) TYPE_MAIN_TYPE(thistype)->vptr_basetype 929 #define TYPE_VPTR_FIELDNO(thistype) TYPE_MAIN_TYPE(thistype)->vptr_fieldno 930 #define TYPE_FN_FIELDS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->fn_fields 931 #define TYPE_NFN_FIELDS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->nfn_fields 932 #define TYPE_NFN_FIELDS_TOTAL(thistype) TYPE_CPLUS_SPECIFIC(thistype)->nfn_fields_total 933 #define TYPE_SPECIFIC_FIELD(thistype) \ 934 TYPE_MAIN_TYPE(thistype)->type_specific_field 935 #define TYPE_TYPE_SPECIFIC(thistype) TYPE_MAIN_TYPE(thistype)->type_specific 936 /* We need this tap-dance with the TYPE_RAW_SPECIFIC because of the case 937 where we're trying to print an Ada array using the C language. 938 In that case, there is no "cplus_stuff", but the C language assumes 939 that there is. What we do, in that case, is pretend that there is 940 an implicit one which is the default cplus stuff. */ 941 #define TYPE_CPLUS_SPECIFIC(thistype) \ 942 (!HAVE_CPLUS_STRUCT(thistype) \ 943 ? (struct cplus_struct_type*)&cplus_struct_default \ 944 : TYPE_RAW_CPLUS_SPECIFIC(thistype)) 945 #define TYPE_RAW_CPLUS_SPECIFIC(thistype) TYPE_MAIN_TYPE(thistype)->type_specific.cplus_stuff 946 #define TYPE_FLOATFORMAT(thistype) TYPE_MAIN_TYPE(thistype)->type_specific.floatformat 947 #define TYPE_GNAT_SPECIFIC(thistype) TYPE_MAIN_TYPE(thistype)->type_specific.gnat_stuff 948 #define TYPE_DESCRIPTIVE_TYPE(thistype) TYPE_GNAT_SPECIFIC(thistype)->descriptive_type 949 #define TYPE_CALLING_CONVENTION(thistype) TYPE_MAIN_TYPE(thistype)->type_specific.calling_convention 950 #define TYPE_BASECLASS(thistype,index) TYPE_FIELD_TYPE(thistype, index) 951 #define TYPE_N_BASECLASSES(thistype) TYPE_CPLUS_SPECIFIC(thistype)->n_baseclasses 952 #define TYPE_BASECLASS_NAME(thistype,index) TYPE_FIELD_NAME(thistype, index) 953 #define TYPE_BASECLASS_BITPOS(thistype,index) TYPE_FIELD_BITPOS(thistype,index) 954 #define BASETYPE_VIA_PUBLIC(thistype, index) \ 955 ((!TYPE_FIELD_PRIVATE(thistype, index)) && (!TYPE_FIELD_PROTECTED(thistype, index))) 956 #define TYPE_CPLUS_DYNAMIC(thistype) TYPE_CPLUS_SPECIFIC (thistype)->is_dynamic 957 958 #define BASETYPE_VIA_VIRTUAL(thistype, index) \ 959 (TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits == NULL ? 0 \ 960 : B_TST(TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits, (index))) 961 962 #define FIELD_TYPE(thisfld) ((thisfld).type) 963 #define FIELD_NAME(thisfld) ((thisfld).name) 964 #define FIELD_LOC_KIND(thisfld) ((thisfld).loc_kind) 965 #define FIELD_BITPOS(thisfld) ((thisfld).loc.bitpos) 966 #define FIELD_STATIC_PHYSNAME(thisfld) ((thisfld).loc.physname) 967 #define FIELD_STATIC_PHYSADDR(thisfld) ((thisfld).loc.physaddr) 968 #define SET_FIELD_BITPOS(thisfld, bitpos) \ 969 (FIELD_LOC_KIND (thisfld) = FIELD_LOC_KIND_BITPOS, \ 970 FIELD_BITPOS (thisfld) = (bitpos)) 971 #define SET_FIELD_PHYSNAME(thisfld, name) \ 972 (FIELD_LOC_KIND (thisfld) = FIELD_LOC_KIND_PHYSNAME, \ 973 FIELD_STATIC_PHYSNAME (thisfld) = (name)) 974 #define SET_FIELD_PHYSADDR(thisfld, addr) \ 975 (FIELD_LOC_KIND (thisfld) = FIELD_LOC_KIND_PHYSADDR, \ 976 FIELD_STATIC_PHYSADDR (thisfld) = (addr)) 977 #define FIELD_ARTIFICIAL(thisfld) ((thisfld).artificial) 978 #define FIELD_BITSIZE(thisfld) ((thisfld).bitsize) 979 980 #define TYPE_FIELD(thistype, n) TYPE_MAIN_TYPE(thistype)->flds_bnds.fields[n] 981 #define TYPE_FIELD_TYPE(thistype, n) FIELD_TYPE(TYPE_FIELD(thistype, n)) 982 #define TYPE_FIELD_NAME(thistype, n) FIELD_NAME(TYPE_FIELD(thistype, n)) 983 #define TYPE_FIELD_LOC_KIND(thistype, n) FIELD_LOC_KIND (TYPE_FIELD (thistype, n)) 984 #define TYPE_FIELD_BITPOS(thistype, n) FIELD_BITPOS (TYPE_FIELD (thistype, n)) 985 #define TYPE_FIELD_STATIC_PHYSNAME(thistype, n) FIELD_STATIC_PHYSNAME (TYPE_FIELD (thistype, n)) 986 #define TYPE_FIELD_STATIC_PHYSADDR(thistype, n) FIELD_STATIC_PHYSADDR (TYPE_FIELD (thistype, n)) 987 #define TYPE_FIELD_ARTIFICIAL(thistype, n) FIELD_ARTIFICIAL(TYPE_FIELD(thistype,n)) 988 #define TYPE_FIELD_BITSIZE(thistype, n) FIELD_BITSIZE(TYPE_FIELD(thistype,n)) 989 #define TYPE_FIELD_PACKED(thistype, n) (FIELD_BITSIZE(TYPE_FIELD(thistype,n))!=0) 990 991 #define TYPE_FIELD_PRIVATE_BITS(thistype) \ 992 TYPE_CPLUS_SPECIFIC(thistype)->private_field_bits 993 #define TYPE_FIELD_PROTECTED_BITS(thistype) \ 994 TYPE_CPLUS_SPECIFIC(thistype)->protected_field_bits 995 #define TYPE_FIELD_IGNORE_BITS(thistype) \ 996 TYPE_CPLUS_SPECIFIC(thistype)->ignore_field_bits 997 #define TYPE_FIELD_VIRTUAL_BITS(thistype) \ 998 TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits 999 #define SET_TYPE_FIELD_PRIVATE(thistype, n) \ 1000 B_SET (TYPE_CPLUS_SPECIFIC(thistype)->private_field_bits, (n)) 1001 #define SET_TYPE_FIELD_PROTECTED(thistype, n) \ 1002 B_SET (TYPE_CPLUS_SPECIFIC(thistype)->protected_field_bits, (n)) 1003 #define SET_TYPE_FIELD_IGNORE(thistype, n) \ 1004 B_SET (TYPE_CPLUS_SPECIFIC(thistype)->ignore_field_bits, (n)) 1005 #define SET_TYPE_FIELD_VIRTUAL(thistype, n) \ 1006 B_SET (TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits, (n)) 1007 #define TYPE_FIELD_PRIVATE(thistype, n) \ 1008 (TYPE_CPLUS_SPECIFIC(thistype)->private_field_bits == NULL ? 0 \ 1009 : B_TST(TYPE_CPLUS_SPECIFIC(thistype)->private_field_bits, (n))) 1010 #define TYPE_FIELD_PROTECTED(thistype, n) \ 1011 (TYPE_CPLUS_SPECIFIC(thistype)->protected_field_bits == NULL ? 0 \ 1012 : B_TST(TYPE_CPLUS_SPECIFIC(thistype)->protected_field_bits, (n))) 1013 #define TYPE_FIELD_IGNORE(thistype, n) \ 1014 (TYPE_CPLUS_SPECIFIC(thistype)->ignore_field_bits == NULL ? 0 \ 1015 : B_TST(TYPE_CPLUS_SPECIFIC(thistype)->ignore_field_bits, (n))) 1016 #define TYPE_FIELD_VIRTUAL(thistype, n) \ 1017 (TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits == NULL ? 0 \ 1018 : B_TST(TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits, (n))) 1019 1020 #define TYPE_FN_FIELDLISTS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists 1021 #define TYPE_FN_FIELDLIST(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists[n] 1022 #define TYPE_FN_FIELDLIST1(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists[n].fn_fields 1023 #define TYPE_FN_FIELDLIST_NAME(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists[n].name 1024 #define TYPE_FN_FIELDLIST_LENGTH(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists[n].length 1025 1026 #define TYPE_FN_FIELD(thisfn, n) (thisfn)[n] 1027 #define TYPE_FN_FIELD_PHYSNAME(thisfn, n) (thisfn)[n].physname 1028 #define TYPE_FN_FIELD_TYPE(thisfn, n) (thisfn)[n].type 1029 #define TYPE_FN_FIELD_ARGS(thisfn, n) TYPE_FIELDS ((thisfn)[n].type) 1030 #define TYPE_FN_FIELD_CONST(thisfn, n) ((thisfn)[n].is_const) 1031 #define TYPE_FN_FIELD_VOLATILE(thisfn, n) ((thisfn)[n].is_volatile) 1032 #define TYPE_FN_FIELD_PRIVATE(thisfn, n) ((thisfn)[n].is_private) 1033 #define TYPE_FN_FIELD_PROTECTED(thisfn, n) ((thisfn)[n].is_protected) 1034 #define TYPE_FN_FIELD_PUBLIC(thisfn, n) ((thisfn)[n].is_public) 1035 #define TYPE_FN_FIELD_STATIC(thisfn, n) ((thisfn)[n].is_static) 1036 #define TYPE_FN_FIELD_FINAL(thisfn, n) ((thisfn)[n].is_final) 1037 #define TYPE_FN_FIELD_SYNCHRONIZED(thisfn, n) ((thisfn)[n].is_synchronized) 1038 #define TYPE_FN_FIELD_NATIVE(thisfn, n) ((thisfn)[n].is_native) 1039 #define TYPE_FN_FIELD_ARTIFICIAL(thisfn, n) ((thisfn)[n].is_artificial) 1040 #define TYPE_FN_FIELD_ABSTRACT(thisfn, n) ((thisfn)[n].is_abstract) 1041 #define TYPE_FN_FIELD_STUB(thisfn, n) ((thisfn)[n].is_stub) 1042 #define TYPE_FN_FIELD_FCONTEXT(thisfn, n) ((thisfn)[n].fcontext) 1043 #define TYPE_FN_FIELD_VOFFSET(thisfn, n) ((thisfn)[n].voffset-2) 1044 #define TYPE_FN_FIELD_VIRTUAL_P(thisfn, n) ((thisfn)[n].voffset > 1) 1045 #define TYPE_FN_FIELD_STATIC_P(thisfn, n) ((thisfn)[n].voffset == VOFFSET_STATIC) 1046 1047 #define TYPE_LOCALTYPE_PTR(thistype) (TYPE_CPLUS_SPECIFIC(thistype)->localtype_ptr) 1048 #define TYPE_LOCALTYPE_FILE(thistype) (TYPE_CPLUS_SPECIFIC(thistype)->localtype_ptr->file) 1049 #define TYPE_LOCALTYPE_LINE(thistype) (TYPE_CPLUS_SPECIFIC(thistype)->localtype_ptr->line) 1050 1051 #define TYPE_TYPEDEF_FIELD_ARRAY(thistype) \ 1052 TYPE_CPLUS_SPECIFIC (thistype)->typedef_field 1053 #define TYPE_TYPEDEF_FIELD(thistype, n) \ 1054 TYPE_CPLUS_SPECIFIC (thistype)->typedef_field[n] 1055 #define TYPE_TYPEDEF_FIELD_NAME(thistype, n) \ 1056 TYPE_TYPEDEF_FIELD (thistype, n).name 1057 #define TYPE_TYPEDEF_FIELD_TYPE(thistype, n) \ 1058 TYPE_TYPEDEF_FIELD (thistype, n).type 1059 #define TYPE_TYPEDEF_FIELD_COUNT(thistype) \ 1060 TYPE_CPLUS_SPECIFIC (thistype)->typedef_field_count 1061 1062 #define TYPE_IS_OPAQUE(thistype) (((TYPE_CODE (thistype) == TYPE_CODE_STRUCT) || \ 1063 (TYPE_CODE (thistype) == TYPE_CODE_UNION)) && \ 1064 (TYPE_NFIELDS (thistype) == 0) && \ 1065 (!HAVE_CPLUS_STRUCT (thistype) \ 1066 || TYPE_NFN_FIELDS (thistype) == 0) && \ 1067 (TYPE_STUB (thistype) || !TYPE_STUB_SUPPORTED (thistype))) 1068 1069 /* A helper macro that returns the name of an error type. If the type 1070 has a name, it is used; otherwise, a default is used. */ 1071 #define TYPE_ERROR_NAME(type) \ 1072 (TYPE_NAME (type) ? TYPE_NAME (type) : _("<error type>")) 1073 1074 struct builtin_type 1075 { 1076 /* Integral types. */ 1077 1078 /* Implicit size/sign (based on the the architecture's ABI). */ 1079 struct type *builtin_void; 1080 struct type *builtin_char; 1081 struct type *builtin_short; 1082 struct type *builtin_int; 1083 struct type *builtin_long; 1084 struct type *builtin_signed_char; 1085 struct type *builtin_unsigned_char; 1086 struct type *builtin_unsigned_short; 1087 struct type *builtin_unsigned_int; 1088 struct type *builtin_unsigned_long; 1089 struct type *builtin_float; 1090 struct type *builtin_double; 1091 struct type *builtin_long_double; 1092 struct type *builtin_complex; 1093 struct type *builtin_double_complex; 1094 struct type *builtin_string; 1095 struct type *builtin_bool; 1096 struct type *builtin_long_long; 1097 struct type *builtin_unsigned_long_long; 1098 struct type *builtin_decfloat; 1099 struct type *builtin_decdouble; 1100 struct type *builtin_declong; 1101 1102 /* "True" character types. 1103 We use these for the '/c' print format, because c_char is just a 1104 one-byte integral type, which languages less laid back than C 1105 will print as ... well, a one-byte integral type. */ 1106 struct type *builtin_true_char; 1107 struct type *builtin_true_unsigned_char; 1108 1109 /* Explicit sizes - see C9X <intypes.h> for naming scheme. The "int0" 1110 is for when an architecture needs to describe a register that has 1111 no size. */ 1112 struct type *builtin_int0; 1113 struct type *builtin_int8; 1114 struct type *builtin_uint8; 1115 struct type *builtin_int16; 1116 struct type *builtin_uint16; 1117 struct type *builtin_int32; 1118 struct type *builtin_uint32; 1119 struct type *builtin_int64; 1120 struct type *builtin_uint64; 1121 struct type *builtin_int128; 1122 struct type *builtin_uint128; 1123 1124 /* Wide character types. */ 1125 struct type *builtin_char16; 1126 struct type *builtin_char32; 1127 1128 /* Pointer types. */ 1129 1130 /* `pointer to data' type. Some target platforms use an implicitly 1131 {sign,zero} -extended 32-bit ABI pointer on a 64-bit ISA. */ 1132 struct type *builtin_data_ptr; 1133 1134 /* `pointer to function (returning void)' type. Harvard 1135 architectures mean that ABI function and code pointers are not 1136 interconvertible. Similarly, since ANSI, C standards have 1137 explicitly said that pointers to functions and pointers to data 1138 are not interconvertible --- that is, you can't cast a function 1139 pointer to void * and back, and expect to get the same value. 1140 However, all function pointer types are interconvertible, so void 1141 (*) () can server as a generic function pointer. */ 1142 struct type *builtin_func_ptr; 1143 1144 1145 /* Special-purpose types. */ 1146 1147 /* This type is used to represent a GDB internal function. */ 1148 struct type *internal_fn; 1149 }; 1150 1151 /* Return the type table for the specified architecture. */ 1152 extern const struct builtin_type *builtin_type (struct gdbarch *gdbarch); 1153 1154 1155 /* Per-objfile types used by symbol readers. */ 1156 1157 struct objfile_type 1158 { 1159 /* Basic types based on the objfile architecture. */ 1160 struct type *builtin_void; 1161 struct type *builtin_char; 1162 struct type *builtin_short; 1163 struct type *builtin_int; 1164 struct type *builtin_long; 1165 struct type *builtin_long_long; 1166 struct type *builtin_signed_char; 1167 struct type *builtin_unsigned_char; 1168 struct type *builtin_unsigned_short; 1169 struct type *builtin_unsigned_int; 1170 struct type *builtin_unsigned_long; 1171 struct type *builtin_unsigned_long_long; 1172 struct type *builtin_float; 1173 struct type *builtin_double; 1174 struct type *builtin_long_double; 1175 1176 /* This type is used to represent symbol addresses. */ 1177 struct type *builtin_core_addr; 1178 1179 /* This type represents a type that was unrecognized in symbol read-in. */ 1180 struct type *builtin_error; 1181 1182 /* Types used for symbols with no debug information. */ 1183 struct type *nodebug_text_symbol; 1184 struct type *nodebug_data_symbol; 1185 struct type *nodebug_unknown_symbol; 1186 struct type *nodebug_tls_symbol; 1187 }; 1188 1189 /* Return the type table for the specified objfile. */ 1190 extern const struct objfile_type *objfile_type (struct objfile *objfile); 1191 1192 1193 /* Explicit floating-point formats. See "floatformat.h". */ 1194 extern const struct floatformat *floatformats_ieee_half[BFD_ENDIAN_UNKNOWN]; 1195 extern const struct floatformat *floatformats_ieee_single[BFD_ENDIAN_UNKNOWN]; 1196 extern const struct floatformat *floatformats_ieee_double[BFD_ENDIAN_UNKNOWN]; 1197 extern const struct floatformat *floatformats_ieee_double_littlebyte_bigword[BFD_ENDIAN_UNKNOWN]; 1198 extern const struct floatformat *floatformats_i387_ext[BFD_ENDIAN_UNKNOWN]; 1199 extern const struct floatformat *floatformats_m68881_ext[BFD_ENDIAN_UNKNOWN]; 1200 extern const struct floatformat *floatformats_arm_ext[BFD_ENDIAN_UNKNOWN]; 1201 extern const struct floatformat *floatformats_ia64_spill[BFD_ENDIAN_UNKNOWN]; 1202 extern const struct floatformat *floatformats_ia64_quad[BFD_ENDIAN_UNKNOWN]; 1203 extern const struct floatformat *floatformats_vax_f[BFD_ENDIAN_UNKNOWN]; 1204 extern const struct floatformat *floatformats_vax_d[BFD_ENDIAN_UNKNOWN]; 1205 extern const struct floatformat *floatformats_ibm_long_double[BFD_ENDIAN_UNKNOWN]; 1206 1207 1208 /* Allocate space for storing data associated with a particular type. 1209 We ensure that the space is allocated using the same mechanism that 1210 was used to allocate the space for the type structure itself. I.E. 1211 if the type is on an objfile's objfile_obstack, then the space for data 1212 associated with that type will also be allocated on the objfile_obstack. 1213 If the type is not associated with any particular objfile (such as 1214 builtin types), then the data space will be allocated with xmalloc, 1215 the same as for the type structure. */ 1216 1217 #define TYPE_ALLOC(t,size) \ 1218 (TYPE_OBJFILE_OWNED (t) \ 1219 ? obstack_alloc (&TYPE_OBJFILE (t) -> objfile_obstack, size) \ 1220 : xmalloc (size)) 1221 1222 #define TYPE_ZALLOC(t,size) \ 1223 (TYPE_OBJFILE_OWNED (t) \ 1224 ? memset (obstack_alloc (&TYPE_OBJFILE (t)->objfile_obstack, size), \ 1225 0, size) \ 1226 : xzalloc (size)) 1227 1228 /* Use alloc_type to allocate a type owned by an objfile. 1229 Use alloc_type_arch to allocate a type owned by an architecture. 1230 Use alloc_type_copy to allocate a type with the same owner as a 1231 pre-existing template type, no matter whether objfile or gdbarch. */ 1232 extern struct type *alloc_type (struct objfile *); 1233 extern struct type *alloc_type_arch (struct gdbarch *); 1234 extern struct type *alloc_type_copy (const struct type *); 1235 1236 /* Return the type's architecture. For types owned by an architecture, 1237 that architecture is returned. For types owned by an objfile, that 1238 objfile's architecture is returned. */ 1239 extern struct gdbarch *get_type_arch (const struct type *); 1240 1241 /* Helper function to construct objfile-owned types. */ 1242 extern struct type *init_type (enum type_code, int, int, char *, 1243 struct objfile *); 1244 1245 /* Helper functions to construct architecture-owned types. */ 1246 extern struct type *arch_type (struct gdbarch *, enum type_code, int, char *); 1247 extern struct type *arch_integer_type (struct gdbarch *, int, int, char *); 1248 extern struct type *arch_character_type (struct gdbarch *, int, int, char *); 1249 extern struct type *arch_boolean_type (struct gdbarch *, int, int, char *); 1250 extern struct type *arch_float_type (struct gdbarch *, int, char *, 1251 const struct floatformat **); 1252 extern struct type *arch_complex_type (struct gdbarch *, char *, 1253 struct type *); 1254 1255 /* Helper functions to construct a struct or record type. An 1256 initially empty type is created using arch_composite_type(). 1257 Fields are then added using append_composite_type_field*(). A union 1258 type has its size set to the largest field. A struct type has each 1259 field packed against the previous. */ 1260 1261 extern struct type *arch_composite_type (struct gdbarch *gdbarch, 1262 char *name, enum type_code code); 1263 extern void append_composite_type_field (struct type *t, char *name, 1264 struct type *field); 1265 extern void append_composite_type_field_aligned (struct type *t, 1266 char *name, 1267 struct type *field, 1268 int alignment); 1269 struct field *append_composite_type_field_raw (struct type *t, char *name, 1270 struct type *field); 1271 1272 /* Helper functions to construct a bit flags type. An initially empty 1273 type is created using arch_flag_type(). Flags are then added using 1274 append_flag_type_flag(). */ 1275 extern struct type *arch_flags_type (struct gdbarch *gdbarch, 1276 char *name, int length); 1277 extern void append_flags_type_flag (struct type *type, int bitpos, char *name); 1278 1279 extern void make_vector_type (struct type *array_type); 1280 extern struct type *init_vector_type (struct type *elt_type, int n); 1281 1282 extern struct type *lookup_reference_type (struct type *); 1283 1284 extern struct type *make_reference_type (struct type *, struct type **); 1285 1286 extern struct type *make_cv_type (int, int, struct type *, struct type **); 1287 1288 extern void replace_type (struct type *, struct type *); 1289 1290 extern int address_space_name_to_int (struct gdbarch *, char *); 1291 1292 extern const char *address_space_int_to_name (struct gdbarch *, int); 1293 1294 extern struct type *make_type_with_address_space (struct type *type, 1295 int space_identifier); 1296 1297 extern struct type *lookup_memberptr_type (struct type *, struct type *); 1298 1299 extern struct type *lookup_methodptr_type (struct type *); 1300 1301 extern void smash_to_method_type (struct type *type, struct type *domain, 1302 struct type *to_type, struct field *args, 1303 int nargs, int varargs); 1304 1305 extern void smash_to_memberptr_type (struct type *, struct type *, 1306 struct type *); 1307 1308 extern void smash_to_methodptr_type (struct type *, struct type *); 1309 1310 extern struct type *allocate_stub_method (struct type *); 1311 1312 extern char *type_name_no_tag (const struct type *); 1313 1314 extern struct type *lookup_struct_elt_type (struct type *, char *, int); 1315 1316 extern struct type *make_pointer_type (struct type *, struct type **); 1317 1318 extern struct type *lookup_pointer_type (struct type *); 1319 1320 extern struct type *make_function_type (struct type *, struct type **); 1321 1322 extern struct type *lookup_function_type (struct type *); 1323 1324 extern struct type *create_range_type (struct type *, struct type *, LONGEST, 1325 LONGEST); 1326 1327 extern struct type *create_array_type (struct type *, struct type *, 1328 struct type *); 1329 extern struct type *lookup_array_range_type (struct type *, int, int); 1330 1331 extern struct type *create_string_type (struct type *, struct type *, 1332 struct type *); 1333 extern struct type *lookup_string_range_type (struct type *, int, int); 1334 1335 extern struct type *create_set_type (struct type *, struct type *); 1336 1337 extern struct type *lookup_unsigned_typename (const struct language_defn *, 1338 struct gdbarch *,char *); 1339 1340 extern struct type *lookup_signed_typename (const struct language_defn *, 1341 struct gdbarch *,char *); 1342 1343 extern struct type *check_typedef (struct type *); 1344 1345 #define CHECK_TYPEDEF(TYPE) \ 1346 do { \ 1347 (TYPE) = check_typedef (TYPE); \ 1348 } while (0) 1349 1350 extern void check_stub_method_group (struct type *, int); 1351 1352 extern char *gdb_mangle_name (struct type *, int, int); 1353 1354 extern struct type *lookup_typename (const struct language_defn *, 1355 struct gdbarch *, char *, 1356 struct block *, int); 1357 1358 extern struct type *lookup_template_type (char *, struct type *, 1359 struct block *); 1360 1361 extern int get_vptr_fieldno (struct type *, struct type **); 1362 1363 extern int get_discrete_bounds (struct type *, LONGEST *, LONGEST *); 1364 1365 extern int class_types_same_p (const struct type *, const struct type *); 1366 1367 extern int is_ancestor (struct type *, struct type *); 1368 1369 extern int is_public_ancestor (struct type *, struct type *); 1370 1371 extern int is_unique_ancestor (struct type *, struct value *); 1372 1373 /* Overload resolution */ 1374 1375 #define LENGTH_MATCH(bv) ((bv)->rank[0]) 1376 1377 /* Badness if parameter list length doesn't match arg list length */ 1378 #define LENGTH_MISMATCH_BADNESS 100 1379 /* Dummy badness value for nonexistent parameter positions */ 1380 #define TOO_FEW_PARAMS_BADNESS 100 1381 /* Badness if no conversion among types */ 1382 #define INCOMPATIBLE_TYPE_BADNESS 100 1383 1384 /* Badness of integral promotion */ 1385 #define INTEGER_PROMOTION_BADNESS 1 1386 /* Badness of floating promotion */ 1387 #define FLOAT_PROMOTION_BADNESS 1 1388 /* Badness of integral conversion */ 1389 #define INTEGER_CONVERSION_BADNESS 2 1390 /* Badness of floating conversion */ 1391 #define FLOAT_CONVERSION_BADNESS 2 1392 /* Badness of integer<->floating conversions */ 1393 #define INT_FLOAT_CONVERSION_BADNESS 2 1394 /* Badness of converting to a boolean */ 1395 #define BOOLEAN_CONVERSION_BADNESS 2 1396 /* Badness of pointer conversion */ 1397 #define POINTER_CONVERSION_BADNESS 2 1398 /* Badness of conversion of pointer to void pointer */ 1399 #define VOID_PTR_CONVERSION_BADNESS 2 1400 /* Badness of converting derived to base class */ 1401 #define BASE_CONVERSION_BADNESS 2 1402 /* Badness of converting from non-reference to reference */ 1403 #define REFERENCE_CONVERSION_BADNESS 2 1404 1405 /* Non-standard conversions allowed by the debugger */ 1406 /* Converting a pointer to an int is usually OK */ 1407 #define NS_POINTER_CONVERSION_BADNESS 10 1408 1409 1410 extern int compare_badness (struct badness_vector *, struct badness_vector *); 1411 1412 extern struct badness_vector *rank_function (struct type **, int, 1413 struct type **, int); 1414 1415 extern int rank_one_type (struct type *, struct type *); 1416 1417 extern void recursive_dump_type (struct type *, int); 1418 1419 extern int field_is_static (struct field *); 1420 1421 /* printcmd.c */ 1422 1423 extern void print_scalar_formatted (const void *, struct type *, 1424 const struct value_print_options *, 1425 int, struct ui_file *); 1426 1427 extern int can_dereference (struct type *); 1428 1429 extern int is_integral_type (struct type *); 1430 1431 extern void maintenance_print_type (char *, int); 1432 1433 extern htab_t create_copied_types_hash (struct objfile *objfile); 1434 1435 extern struct type *copy_type_recursive (struct objfile *objfile, 1436 struct type *type, 1437 htab_t copied_types); 1438 1439 extern struct type *copy_type (const struct type *type); 1440 1441 #endif /* GDBTYPES_H */ 1442