gdb/gdbtypes.h

   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 Free Software Foundation, Inc.
   5
   6    Contributed by Cygnus Support, using pieces from other GDB modules.
   7
   8    This file is part of GDB.
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  22
  23 #if !defined (GDBTYPES_H)
  24 #define GDBTYPES_H 1
  25
  26 #include "hashtab.h"
  27
  28 /* Forward declarations for prototypes.  */
  29 struct field;
  30 struct block;
  31
  32 /* Some macros for char-based bitfields.  */
  33
  34 #define B_SET(a,x)      ((a)[(x)>>3] |= (1 << ((x)&7)))
  35 #define B_CLR(a,x)      ((a)[(x)>>3] &= ~(1 << ((x)&7)))
  36 #define B_TST(a,x)      ((a)[(x)>>3] & (1 << ((x)&7)))
  37 #define B_TYPE          unsigned char
  38 #define B_BYTES(x)      ( 1 + ((x)>>3) )
  39 #define B_CLRALL(a,x)   memset ((a), 0, B_BYTES(x))
  40
  41 /* Different kinds of data types are distinguished by the `code' field.  */
  42
  43 enum type_code
  44   {
  45     TYPE_CODE_UNDEF,            /* Not used; catches errors */
  46     TYPE_CODE_PTR,              /* Pointer type */
  47
  48     /* Array type with lower & upper bounds.
  49
  50        Regardless of the language, GDB represents multidimensional
  51        array types the way C does: as arrays of arrays.  So an
  52        instance of a GDB array type T can always be seen as a series
  53        of instances of TYPE_TARGET_TYPE (T) laid out sequentially in
  54        memory.
  55
  56        Row-major languages like C lay out multi-dimensional arrays so
  57        that incrementing the rightmost index in a subscripting
  58        expression results in the smallest change in the address of the
  59        element referred to.  Column-major languages like Fortran lay
  60        them out so that incrementing the leftmost index results in the
  61        smallest change.
  62
  63        This means that, in column-major languages, working our way
  64        from type to target type corresponds to working through indices
  65        from right to left, not left to right.  */
  66     TYPE_CODE_ARRAY,
  67
  68     TYPE_CODE_STRUCT,           /* C struct or Pascal record */
  69     TYPE_CODE_UNION,            /* C union or Pascal variant part */
  70     TYPE_CODE_ENUM,             /* Enumeration type */
  71     TYPE_CODE_FLAGS,            /* Bit flags type */
  72     TYPE_CODE_FUNC,             /* Function type */
  73     TYPE_CODE_INT,              /* Integer type */
  74
  75     /* Floating type.  This is *NOT* a complex type.  Beware, there are parts
  76        of GDB which bogusly assume that TYPE_CODE_FLT can mean complex.  */
  77     TYPE_CODE_FLT,
  78
  79     /* Void type.  The length field specifies the length (probably always
  80        one) which is used in pointer arithmetic involving pointers to
  81        this type, but actually dereferencing such a pointer is invalid;
  82        a void type has no length and no actual representation in memory
  83        or registers.  A pointer to a void type is a generic pointer.  */
  84     TYPE_CODE_VOID,
  85
  86     TYPE_CODE_SET,              /* Pascal sets */
  87     TYPE_CODE_RANGE,            /* Range (integers within spec'd bounds) */
  88
  89     /* A string type which is like an array of character but prints
  90        differently (at least for (the deleted) CHILL).  It does not
  91        contain a length field as Pascal strings (for many Pascals,
  92        anyway) do; if we want to deal with such strings, we should use
  93        a new type code.  */
  94     TYPE_CODE_STRING,
  95
  96     /* String of bits; like TYPE_CODE_SET but prints differently (at
  97        least for (the deleted) CHILL).  */
  98     TYPE_CODE_BITSTRING,
  99
 100     /* Unknown type.  The length field is valid if we were able to
 101        deduce that much about the type, or 0 if we don't even know that.  */
 102     TYPE_CODE_ERROR,
 103
 104     /* C++ */
 105     TYPE_CODE_METHOD,           /* Method type */
 106
 107     /* Pointer-to-member-function type.  This describes how to access a
 108        particular member function of a class (possibly a virtual
 109        member function).  The representation may vary between different
 110        C++ ABIs.  */
 111     TYPE_CODE_METHODPTR,
 112
 113     /* Pointer-to-member type.  This is the offset within a class to some
 114        particular data member.  The only currently supported representation
 115        uses an unbiased offset, with -1 representing NULL; this is used
 116        by the Itanium C++ ABI (used by GCC on all platforms).  */
 117     TYPE_CODE_MEMBERPTR,
 118
 119     TYPE_CODE_REF,              /* C++ Reference types */
 120
 121     TYPE_CODE_CHAR,             /* *real* character type */
 122
 123     /* Boolean type.  0 is false, 1 is true, and other values are non-boolean
 124        (e.g. FORTRAN "logical" used as unsigned int).  */
 125     TYPE_CODE_BOOL,
 126
 127     /* Fortran */
 128     TYPE_CODE_COMPLEX,          /* Complex float */
 129
 130     TYPE_CODE_TYPEDEF,
 131     TYPE_CODE_TEMPLATE,         /* C++ template */
 132     TYPE_CODE_TEMPLATE_ARG,     /* C++ template arg */
 133
 134     TYPE_CODE_NAMESPACE,        /* C++ namespace.  */
 135
 136     TYPE_CODE_DECFLOAT          /* Decimal floating point.  */
 137   };
 138
 139 /* For now allow source to use TYPE_CODE_CLASS for C++ classes, as an
 140    alias for TYPE_CODE_STRUCT.  This is for DWARF, which has a distinct
 141    "class" attribute.  Perhaps we should actually have a separate TYPE_CODE
 142    so that we can print "class" or "struct" depending on what the debug
 143    info said.  It's not clear we should bother.  */
 144
 145 #define TYPE_CODE_CLASS TYPE_CODE_STRUCT
 146
 147 /* Some bits for the type's flags word, and macros to test them. */
 148
 149 /* Unsigned integer type.  If this is not set for a TYPE_CODE_INT, the
 150    type is signed (unless TYPE_FLAG_NOSIGN (below) is set). */
 151
 152 #define TYPE_FLAG_UNSIGNED      (1 << 0)
 153 #define TYPE_UNSIGNED(t)        (TYPE_FLAGS (t) & TYPE_FLAG_UNSIGNED)
 154
 155 /* No sign for this type.  In C++, "char", "signed char", and "unsigned
 156    char" are distinct types; so we need an extra flag to indicate the
 157    absence of a sign! */
 158
 159 #define TYPE_FLAG_NOSIGN        (1 << 1)
 160 #define TYPE_NOSIGN(t)          (TYPE_FLAGS (t) & TYPE_FLAG_NOSIGN)
 161
 162 /* This appears in a type's flags word if it is a stub type (e.g., if
 163    someone referenced a type that wasn't defined in a source file
 164    via (struct sir_not_appearing_in_this_film *)).  */
 165
 166 #define TYPE_FLAG_STUB          (1 << 2)
 167 #define TYPE_STUB(t)            (TYPE_FLAGS (t) & TYPE_FLAG_STUB)
 168
 169 /* The target type of this type is a stub type, and this type needs to
 170    be updated if it gets un-stubbed in check_typedef.
 171    Used for arrays and ranges, in which TYPE_LENGTH of the array/range
 172    gets set based on the TYPE_LENGTH of the target type.
 173    Also, set for TYPE_CODE_TYPEDEF. */
 174
 175 #define TYPE_FLAG_TARGET_STUB   (1 << 3)
 176 #define TYPE_TARGET_STUB(t)     (TYPE_FLAGS (t) & TYPE_FLAG_TARGET_STUB)
 177
 178 /* Static type.  If this is set, the corresponding type had
 179  * a static modifier.
 180  * Note: This may be unnecessary, since static data members
 181  * are indicated by other means (bitpos == -1)
 182  */
 183
 184 #define TYPE_FLAG_STATIC        (1 << 4)
 185 #define TYPE_STATIC(t)          (TYPE_FLAGS (t) & TYPE_FLAG_STATIC)
 186
 187 /* Constant type.  If this is set, the corresponding type has a
 188  * const modifier.
 189  */
 190
 191 #define TYPE_FLAG_CONST         (1 << 5)
 192 #define TYPE_CONST(t)           (TYPE_INSTANCE_FLAGS (t) & TYPE_FLAG_CONST)
 193
 194 /* Volatile type.  If this is set, the corresponding type has a
 195  * volatile modifier.
 196  */
 197
 198 #define TYPE_FLAG_VOLATILE      (1 << 6)
 199 #define TYPE_VOLATILE(t)        (TYPE_INSTANCE_FLAGS (t) & TYPE_FLAG_VOLATILE)
 200
 201
 202 /* This is a function type which appears to have a prototype.  We need this
 203    for function calls in order to tell us if it's necessary to coerce the args,
 204    or to just do the standard conversions.  This is used with a short field. */
 205
 206 #define TYPE_FLAG_PROTOTYPED    (1 << 7)
 207 #define TYPE_PROTOTYPED(t)      (TYPE_FLAGS (t) & TYPE_FLAG_PROTOTYPED)
 208
 209 /* This flag is used to indicate that processing for this type
 210    is incomplete.
 211
 212    (Mostly intended for HP platforms, where class methods, for
 213    instance, can be encountered before their classes in the debug
 214    info; the incomplete type has to be marked so that the class and
 215    the method can be assigned correct types.) */
 216
 217 #define TYPE_FLAG_INCOMPLETE    (1 << 8)
 218 #define TYPE_INCOMPLETE(t)      (TYPE_FLAGS (t) & TYPE_FLAG_INCOMPLETE)
 219
 220 /* Instruction-space delimited type.  This is for Harvard architectures
 221    which have separate instruction and data address spaces (and perhaps
 222    others).
 223
 224    GDB usually defines a flat address space that is a superset of the
 225    architecture's two (or more) address spaces, but this is an extension
 226    of the architecture's model.
 227
 228    If TYPE_FLAG_INST is set, an object of the corresponding type
 229    resides in instruction memory, even if its address (in the extended
 230    flat address space) does not reflect this.
 231
 232    Similarly, if TYPE_FLAG_DATA is set, then an object of the
 233    corresponding type resides in the data memory space, even if
 234    this is not indicated by its (flat address space) address.
 235
 236    If neither flag is set, the default space for functions / methods
 237    is instruction space, and for data objects is data memory.  */
 238
 239 #define TYPE_FLAG_CODE_SPACE    (1 << 9)
 240 #define TYPE_CODE_SPACE(t)      (TYPE_INSTANCE_FLAGS (t) & TYPE_FLAG_CODE_SPACE)
 241
 242 #define TYPE_FLAG_DATA_SPACE    (1 << 10)
 243 #define TYPE_DATA_SPACE(t)      (TYPE_INSTANCE_FLAGS (t) & TYPE_FLAG_DATA_SPACE)
 244
 245 /* FIXME drow/2002-06-03:  Only used for methods, but applies as well
 246    to functions.  */
 247
 248 #define TYPE_FLAG_VARARGS       (1 << 11)
 249 #define TYPE_VARARGS(t)         (TYPE_FLAGS (t) & TYPE_FLAG_VARARGS)
 250
 251 /* Identify a vector type.  Gcc is handling this by adding an extra
 252    attribute to the array type.  We slurp that in as a new flag of a
 253    type.  This is used only in dwarf2read.c.  */
 254 #define TYPE_FLAG_VECTOR        (1 << 12)
 255 #define TYPE_VECTOR(t)          (TYPE_FLAGS (t) & TYPE_FLAG_VECTOR)
 256
 257 /* Address class flags.  Some environments provide for pointers whose
 258    size is different from that of a normal pointer or address types
 259    where the bits are interpreted differently than normal addresses.  The
 260    TYPE_FLAG_ADDRESS_CLASS_n flags may be used in target specific
 261    ways to represent these different types of address classes.  */
 262 #define TYPE_FLAG_ADDRESS_CLASS_1 (1 << 13)
 263 #define TYPE_ADDRESS_CLASS_1(t) (TYPE_INSTANCE_FLAGS(t) \
 264                                  & TYPE_FLAG_ADDRESS_CLASS_1)
 265 #define TYPE_FLAG_ADDRESS_CLASS_2 (1 << 14)
 266 #define TYPE_ADDRESS_CLASS_2(t) (TYPE_INSTANCE_FLAGS(t) \
 267                                  & TYPE_FLAG_ADDRESS_CLASS_2)
 268 #define TYPE_FLAG_ADDRESS_CLASS_ALL (TYPE_FLAG_ADDRESS_CLASS_1 \
 269                                      | TYPE_FLAG_ADDRESS_CLASS_2)
 270 #define TYPE_ADDRESS_CLASS_ALL(t) (TYPE_INSTANCE_FLAGS(t) \
 271                                    & TYPE_FLAG_ADDRESS_CLASS_ALL)
 272
 273 /* The debugging formats (especially STABS) do not contain enough information
 274    to represent all Ada types---especially those whose size depends on
 275    dynamic quantities.  Therefore, the GNAT Ada compiler includes
 276    extra information in the form of additional type definitions
 277    connected by naming conventions.  This flag indicates that the
 278    type is an ordinary (unencoded) GDB type that has been created from
 279    the necessary run-time information, and does not need further
 280    interpretation. Optionally marks ordinary, fixed-size GDB type. */
 281
 282 #define TYPE_FLAG_FIXED_INSTANCE (1 << 15)
 283
 284 /* This debug target supports TYPE_STUB(t).  In the unsupported case we have to
 285    rely on NFIELDS to be zero etc., see TYPE_IS_OPAQUE ().
 286    TYPE_STUB(t) with !TYPE_STUB_SUPPORTED(t) may exist if we only guessed
 287    the TYPE_STUB(t) value (see dwarfread.c).  */
 288
 289 #define TYPE_FLAG_STUB_SUPPORTED (1 << 16)
 290 #define TYPE_STUB_SUPPORTED(t)   (TYPE_FLAGS (t) & TYPE_FLAG_STUB_SUPPORTED)
 291
 292 /* Not textual.  By default, GDB treats all single byte integers as
 293    characters (or elements of strings) unless this flag is set.  */
 294
 295 #define TYPE_FLAG_NOTTEXT       (1 << 17)
 296 #define TYPE_NOTTEXT(t)         (TYPE_FLAGS (t) & TYPE_FLAG_NOTTEXT)
 297
 298 /*  Array bound type.  */
 299 enum array_bound_type
 300 {
 301   BOUND_SIMPLE = 0,
 302   BOUND_BY_VALUE_IN_REG,
 303   BOUND_BY_REF_IN_REG,
 304   BOUND_BY_VALUE_ON_STACK,
 305   BOUND_BY_REF_ON_STACK,
 306   BOUND_CANNOT_BE_DETERMINED
 307 };
 308
 309 /* This structure is space-critical.
 310    Its layout has been tweaked to reduce the space used.  */
 311
 312 struct main_type
 313 {
 314   /* Code for kind of type */
 315
 316   ENUM_BITFIELD(type_code) code : 8;
 317
 318   /* Array bounds.  These fields appear at this location because
 319      they pack nicely here.  */
 320
 321   ENUM_BITFIELD(array_bound_type) upper_bound_type : 4;
 322   ENUM_BITFIELD(array_bound_type) lower_bound_type : 4;
 323
 324   /* Name of this type, or NULL if none.
 325
 326      This is used for printing only, except by poorly designed C++ code.
 327      For looking up a name, look for a symbol in the VAR_DOMAIN.  */
 328
 329   char *name;
 330
 331   /* Tag name for this type, or NULL if none.  This means that the
 332      name of the type consists of a keyword followed by the tag name.
 333      Which keyword is determined by the type code ("struct" for
 334      TYPE_CODE_STRUCT, etc.).  As far as I know C/C++ are the only languages
 335      with this feature.
 336
 337      This is used for printing only, except by poorly designed C++ code.
 338      For looking up a name, look for a symbol in the STRUCT_DOMAIN.
 339      One more legitimate use is that if TYPE_FLAG_STUB is set, this is
 340      the name to use to look for definitions in other files.  */
 341
 342   char *tag_name;
 343
 344   /* Every type is now associated with a particular objfile, and the
 345      type is allocated on the objfile_obstack for that objfile.  One problem
 346      however, is that there are times when gdb allocates new types while
 347      it is not in the process of reading symbols from a particular objfile.
 348      Fortunately, these happen when the type being created is a derived
 349      type of an existing type, such as in lookup_pointer_type().  So
 350      we can just allocate the new type using the same objfile as the
 351      existing type, but to do this we need a backpointer to the objfile
 352      from the existing type.  Yes this is somewhat ugly, but without
 353      major overhaul of the internal type system, it can't be avoided
 354      for now. */
 355
 356   struct objfile *objfile;
 357
 358   /* For a pointer type, describes the type of object pointed to.
 359      For an array type, describes the type of the elements.
 360      For a function or method type, describes the type of the return value.
 361      For a range type, describes the type of the full range.
 362      For a complex type, describes the type of each coordinate.
 363      Unused otherwise.  */
 364
 365   struct type *target_type;
 366
 367   /* Flags about this type.  */
 368
 369   int flags;
 370
 371   /* Number of fields described for this type */
 372
 373   short nfields;
 374
 375   /* Field number of the virtual function table pointer in
 376      VPTR_BASETYPE.  If -1, we were unable to find the virtual
 377      function table pointer in initial symbol reading, and
 378      get_vptr_fieldno should be called to find it if possible.
 379      get_vptr_fieldno will update this field if possible.
 380      Otherwise the value is left at -1.
 381
 382      Unused if this type does not have virtual functions.  */
 383
 384   short vptr_fieldno;
 385
 386   /* For structure and union types, a description of each field.
 387      For set and pascal array types, there is one "field",
 388      whose type is the domain type of the set or array.
 389      For range types, there are two "fields",
 390      the minimum and maximum values (both inclusive).
 391      For enum types, each possible value is described by one "field".
 392      For a function or method type, a "field" for each parameter.
 393      For C++ classes, there is one field for each base class (if it is
 394      a derived class) plus one field for each class data member.  Member
 395      functions are recorded elsewhere.
 396
 397      Using a pointer to a separate array of fields
 398      allows all types to have the same size, which is useful
 399      because we can allocate the space for a type before
 400      we know what to put in it.  */
 401
 402   struct field
 403   {
 404     union field_location
 405     {
 406       /* Position of this field, counting in bits from start of
 407          containing structure.
 408          For gdbarch_bits_big_endian=1 targets, it is the bit offset to the MSB.
 409          For gdbarch_bits_big_endian=0 targets, it is the bit offset to the LSB.
 410          For a range bound or enum value, this is the value itself. */
 411
 412       int bitpos;
 413
 414       /* For a static field, if TYPE_FIELD_STATIC_HAS_ADDR then physaddr
 415          is the location (in the target) of the static field.
 416          Otherwise, physname is the mangled label of the static field. */
 417
 418       CORE_ADDR physaddr;
 419       char *physname;
 420     }
 421     loc;
 422
 423     /* For a function or member type, this is 1 if the argument is marked
 424        artificial.  Artificial arguments should not be shown to the
 425        user.  */
 426     unsigned int artificial : 1;
 427
 428     /* This flag is zero for non-static fields, 1 for fields whose location
 429        is specified by the label loc.physname, and 2 for fields whose location
 430        is specified by loc.physaddr.  */
 431
 432     unsigned int static_kind : 2;
 433
 434     /* Size of this field, in bits, or zero if not packed.
 435        For an unpacked field, the field's type's length
 436        says how many bytes the field occupies.  */
 437
 438     unsigned int bitsize : 29;
 439
 440     /* In a struct or union type, type of this field.
 441        In a function or member type, type of this argument.
 442        In an array type, the domain-type of the array.  */
 443
 444     struct type *type;
 445
 446     /* Name of field, value or argument.
 447        NULL for range bounds, array domains, and member function
 448        arguments.  */
 449
 450     char *name;
 451
 452   } *fields;
 453
 454   /* For types with virtual functions (TYPE_CODE_STRUCT), VPTR_BASETYPE
 455      is the base class which defined the virtual function table pointer.
 456
 457      For types that are pointer to member types (TYPE_CODE_METHODPTR,
 458      TYPE_CODE_MEMBERPTR), VPTR_BASETYPE is the type that this pointer
 459      is a member of.
 460
 461      For method types (TYPE_CODE_METHOD), VPTR_BASETYPE is the aggregate
 462      type that contains the method.
 463
 464      Unused otherwise.  */
 465
 466   struct type *vptr_basetype;
 467
 468   /* Slot to point to additional language-specific fields of this type.  */
 469
 470   union type_specific
 471   {
 472     /* CPLUS_STUFF is for TYPE_CODE_STRUCT.  It is initialized to point to
 473        cplus_struct_default, a default static instance of a struct
 474        cplus_struct_type. */
 475
 476     struct cplus_struct_type *cplus_stuff;
 477
 478     /* FLOATFORMAT is for TYPE_CODE_FLT.  It is a pointer to two
 479        floatformat objects that describe the floating-point value
 480        that resides within the type.  The first is for big endian
 481        targets and the second is for little endian targets.  */
 482
 483     const struct floatformat **floatformat;
 484
 485     /* For TYPE_CODE_FUNC types, the calling convention for targets
 486        supporting multiple ABIs.  Right now this is only fetched from
 487        the Dwarf-2 DW_AT_calling_convention attribute.  */
 488     unsigned calling_convention;
 489   } type_specific;
 490 };
 491
 492 /* A ``struct type'' describes a particular instance of a type, with
 493    some particular qualification.  */
 494 struct type
 495 {
 496   /* Type that is a pointer to this type.
 497      NULL if no such pointer-to type is known yet.
 498      The debugger may add the address of such a type
 499      if it has to construct one later.  */
 500
 501   struct type *pointer_type;
 502
 503   /* C++: also need a reference type.  */
 504
 505   struct type *reference_type;
 506
 507   /* Variant chain.  This points to a type that differs from this one only
 508      in qualifiers and length.  Currently, the possible qualifiers are
 509      const, volatile, code-space, data-space, and address class.  The
 510      length may differ only when one of the address class flags are set.
 511      The variants are linked in a circular ring and share MAIN_TYPE.  */
 512   struct type *chain;
 513
 514   /* Flags specific to this instance of the type, indicating where
 515      on the ring we are.  */
 516   int instance_flags;
 517
 518   /* Length of storage for a value of this type.  This is what
 519      sizeof(type) would return; use it for address arithmetic,
 520      memory reads and writes, etc.  This size includes padding.  For
 521      example, an i386 extended-precision floating point value really
 522      only occupies ten bytes, but most ABI's declare its size to be
 523      12 bytes, to preserve alignment.  A `struct type' representing
 524      such a floating-point type would have a `length' value of 12,
 525      even though the last two bytes are unused.
 526
 527      There's a bit of a host/target mess here, if you're concerned
 528      about machines whose bytes aren't eight bits long, or who don't
 529      have byte-addressed memory.  Various places pass this to memcpy
 530      and such, meaning it must be in units of host bytes.  Various
 531      other places expect they can calculate addresses by adding it
 532      and such, meaning it must be in units of target bytes.  For
 533      some DSP targets, in which HOST_CHAR_BIT will (presumably) be 8
 534      and TARGET_CHAR_BIT will be (say) 32, this is a problem.
 535
 536      One fix would be to make this field in bits (requiring that it
 537      always be a multiple of HOST_CHAR_BIT and TARGET_CHAR_BIT) ---
 538      the other choice would be to make it consistently in units of
 539      HOST_CHAR_BIT.  However, this would still fail to address
 540      machines based on a ternary or decimal representation.  */
 541
 542   unsigned length;
 543
 544   /* Core type, shared by a group of qualified types.  */
 545   struct main_type *main_type;
 546 };
 547
 548 #define NULL_TYPE ((struct type *) 0)
 549
 550 /* C++ language-specific information for TYPE_CODE_STRUCT and TYPE_CODE_UNION
 551    nodes.  */
 552
 553 struct cplus_struct_type
 554   {
 555     /* Number of base classes this type derives from.  The baseclasses are
 556        stored in the first N_BASECLASSES fields (i.e. the `fields' field of
 557        the struct type).  I think only the `type' field of such a field has
 558        any meaning.  */
 559
 560     short n_baseclasses;
 561
 562     /* Number of methods with unique names.  All overloaded methods with
 563        the same name count only once. */
 564
 565     short nfn_fields;
 566
 567     /* Number of methods described for this type, not including the
 568        methods that it derives from.  */
 569
 570     short nfn_fields_total;
 571
 572     /* The "declared_type" field contains a code saying how the
 573        user really declared this type, e.g., "class s", "union s",
 574        "struct s".
 575        The 3 above things come out from the C++ compiler looking like classes,
 576        but we keep track of the real declaration so we can give
 577        the correct information on "ptype". (Note: TEMPLATE may not
 578        belong in this list...)  */
 579
 580 #define DECLARED_TYPE_CLASS 0
 581 #define DECLARED_TYPE_UNION 1
 582 #define DECLARED_TYPE_STRUCT 2
 583 #define DECLARED_TYPE_TEMPLATE 3
 584     short declared_type;        /* One of the above codes */
 585
 586     /* For derived classes, the number of base classes is given by n_baseclasses
 587        and virtual_field_bits is a bit vector containing one bit per base class.
 588        If the base class is virtual, the corresponding bit will be set.
 589        I.E, given:
 590
 591        class A{};
 592        class B{};
 593        class C : public B, public virtual A {};
 594
 595        B is a baseclass of C; A is a virtual baseclass for C.
 596        This is a C++ 2.0 language feature. */
 597
 598     B_TYPE *virtual_field_bits;
 599
 600     /* For classes with private fields, the number of fields is given by
 601        nfields and private_field_bits is a bit vector containing one bit
 602        per field.
 603        If the field is private, the corresponding bit will be set. */
 604
 605     B_TYPE *private_field_bits;
 606
 607     /* For classes with protected fields, the number of fields is given by
 608        nfields and protected_field_bits is a bit vector containing one bit
 609        per field.
 610        If the field is private, the corresponding bit will be set. */
 611
 612     B_TYPE *protected_field_bits;
 613
 614     /* for classes with fields to be ignored, either this is optimized out
 615        or this field has length 0 */
 616
 617     B_TYPE *ignore_field_bits;
 618
 619     /* For classes, structures, and unions, a description of each field,
 620        which consists of an overloaded name, followed by the types of
 621        arguments that the method expects, and then the name after it
 622        has been renamed to make it distinct.
 623
 624        fn_fieldlists points to an array of nfn_fields of these. */
 625
 626     struct fn_fieldlist
 627       {
 628
 629         /* The overloaded name.  */
 630
 631         char *name;
 632
 633         /* The number of methods with this name.  */
 634
 635         int length;
 636
 637         /* The list of methods.  */
 638
 639         struct fn_field
 640           {
 641
 642             /* If is_stub is clear, this is the mangled name which we can
 643                look up to find the address of the method (FIXME: it would
 644                be cleaner to have a pointer to the struct symbol here
 645                instead).  */
 646
 647             /* If is_stub is set, this is the portion of the mangled
 648                name which specifies the arguments.  For example, "ii",
 649                if there are two int arguments, or "" if there are no
 650                arguments.  See gdb_mangle_name for the conversion from this
 651                format to the one used if is_stub is clear.  */
 652
 653             char *physname;
 654
 655             /* The function type for the method.
 656                (This comment used to say "The return value of the method",
 657                but that's wrong. The function type
 658                is expected here, i.e. something with TYPE_CODE_FUNC,
 659                and *not* the return-value type). */
 660
 661             struct type *type;
 662
 663             /* For virtual functions.
 664                First baseclass that defines this virtual function.   */
 665
 666             struct type *fcontext;
 667
 668             /* Attributes. */
 669
 670             unsigned int is_const:1;
 671             unsigned int is_volatile:1;
 672             unsigned int is_private:1;
 673             unsigned int is_protected:1;
 674             unsigned int is_public:1;
 675             unsigned int is_abstract:1;
 676             unsigned int is_static:1;
 677             unsigned int is_final:1;
 678             unsigned int is_synchronized:1;
 679             unsigned int is_native:1;
 680             unsigned int is_artificial:1;
 681
 682             /* A stub method only has some fields valid (but they are enough
 683                to reconstruct the rest of the fields).  */
 684             unsigned int is_stub:1;
 685
 686             /* C++ method that is inlined */
 687             unsigned int is_inlined:1;
 688
 689             /* Unused.  */
 690             unsigned int dummy:3;
 691
 692             /* Index into that baseclass's virtual function table,
 693                minus 2; else if static: VOFFSET_STATIC; else: 0.  */
 694
 695             unsigned int voffset:16;
 696
 697 #define VOFFSET_STATIC 1
 698
 699           }
 700          *fn_fields;
 701
 702       }
 703      *fn_fieldlists;
 704
 705     /* If this "struct type" describes a template, then it
 706      * has arguments. "template_args" points to an array of
 707      * template arg descriptors, of length "ntemplate_args".
 708      * The only real information in each of these template arg descriptors
 709      * is a name. "type" will typically just point to a "struct type" with
 710      * the placeholder TYPE_CODE_TEMPLATE_ARG type.
 711      */
 712     short ntemplate_args;
 713     struct template_arg
 714       {
 715         char *name;
 716         struct type *type;
 717       }
 718      *template_args;
 719
 720     /* If this "struct type" describes a template, it has a list
 721      * of instantiations. "instantiations" is a pointer to an array
 722      * of type's, one representing each instantiation. There
 723      * are "ninstantiations" elements in this array.
 724      */
 725     short ninstantiations;
 726     struct type **instantiations;
 727
 728     /* Pointer to information about enclosing scope, if this is a
 729      * local type.  If it is not a local type, this is NULL
 730      */
 731     struct local_type_info
 732       {
 733         char *file;
 734         int line;
 735       }
 736      *localtype_ptr;
 737   };
 738
 739 /* Struct used in computing virtual base list */
 740 struct vbase
 741   {
 742     struct type *vbasetype;     /* pointer to virtual base */
 743     struct vbase *next;         /* next in chain */
 744   };
 745
 746 /* Struct used for ranking a function for overload resolution */
 747 struct badness_vector
 748   {
 749     int length;
 750     int *rank;
 751   };
 752
 753 /* The default value of TYPE_CPLUS_SPECIFIC(T) points to the
 754    this shared static structure. */
 755
 756 extern const struct cplus_struct_type cplus_struct_default;
 757
 758 extern void allocate_cplus_struct_type (struct type *);
 759
 760 #define INIT_CPLUS_SPECIFIC(type) \
 761   (TYPE_CPLUS_SPECIFIC(type)=(struct cplus_struct_type*)&cplus_struct_default)
 762 #define ALLOCATE_CPLUS_STRUCT_TYPE(type) allocate_cplus_struct_type (type)
 763 #define HAVE_CPLUS_STRUCT(type) \
 764   (TYPE_CPLUS_SPECIFIC(type) != &cplus_struct_default)
 765
 766 #define TYPE_INSTANCE_FLAGS(thistype) (thistype)->instance_flags
 767 #define TYPE_MAIN_TYPE(thistype) (thistype)->main_type
 768 #define TYPE_NAME(thistype) TYPE_MAIN_TYPE(thistype)->name
 769 #define TYPE_TAG_NAME(type) TYPE_MAIN_TYPE(type)->tag_name
 770 #define TYPE_TARGET_TYPE(thistype) TYPE_MAIN_TYPE(thistype)->target_type
 771 #define TYPE_POINTER_TYPE(thistype) (thistype)->pointer_type
 772 #define TYPE_REFERENCE_TYPE(thistype) (thistype)->reference_type
 773 #define TYPE_CHAIN(thistype) (thistype)->chain
 774 /* Note that if thistype is a TYPEDEF type, you have to call check_typedef.
 775    But check_typedef does set the TYPE_LENGTH of the TYPEDEF type,
 776    so you only have to call check_typedef once.  Since allocate_value
 777    calls check_typedef, TYPE_LENGTH (VALUE_TYPE (X)) is safe.  */
 778 #define TYPE_LENGTH(thistype) (thistype)->length
 779 #define TYPE_OBJFILE(thistype) TYPE_MAIN_TYPE(thistype)->objfile
 780 #define TYPE_FLAGS(thistype) TYPE_MAIN_TYPE(thistype)->flags
 781 /* Note that TYPE_CODE can be TYPE_CODE_TYPEDEF, so if you want the real
 782    type, you need to do TYPE_CODE (check_type (this_type)). */
 783 #define TYPE_CODE(thistype) TYPE_MAIN_TYPE(thistype)->code
 784 #define TYPE_NFIELDS(thistype) TYPE_MAIN_TYPE(thistype)->nfields
 785 #define TYPE_FIELDS(thistype) TYPE_MAIN_TYPE(thistype)->fields
 786 #define TYPE_TEMPLATE_ARGS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->template_args
 787 #define TYPE_INSTANTIATIONS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->instantiations
 788
 789 #define TYPE_INDEX_TYPE(type) TYPE_FIELD_TYPE (type, 0)
 790 #define TYPE_LOW_BOUND(range_type) TYPE_FIELD_BITPOS (range_type, 0)
 791 #define TYPE_HIGH_BOUND(range_type) TYPE_FIELD_BITPOS (range_type, 1)
 792
 793 /* Moto-specific stuff for FORTRAN arrays */
 794
 795 #define TYPE_ARRAY_UPPER_BOUND_TYPE(thistype) \
 796         TYPE_MAIN_TYPE(thistype)->upper_bound_type
 797 #define TYPE_ARRAY_LOWER_BOUND_TYPE(thistype) \
 798         TYPE_MAIN_TYPE(thistype)->lower_bound_type
 799
 800 #define TYPE_ARRAY_UPPER_BOUND_VALUE(arraytype) \
 801    (TYPE_FIELD_BITPOS((TYPE_FIELD_TYPE((arraytype),0)),1))
 802
 803 #define TYPE_ARRAY_LOWER_BOUND_VALUE(arraytype) \
 804    (TYPE_FIELD_BITPOS((TYPE_FIELD_TYPE((arraytype),0)),0))
 805
 806 /* C++ */
 807
 808 #define TYPE_VPTR_BASETYPE(thistype) TYPE_MAIN_TYPE(thistype)->vptr_basetype
 809 #define TYPE_DOMAIN_TYPE(thistype) TYPE_MAIN_TYPE(thistype)->vptr_basetype
 810 #define TYPE_VPTR_FIELDNO(thistype) TYPE_MAIN_TYPE(thistype)->vptr_fieldno
 811 #define TYPE_FN_FIELDS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->fn_fields
 812 #define TYPE_NFN_FIELDS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->nfn_fields
 813 #define TYPE_NFN_FIELDS_TOTAL(thistype) TYPE_CPLUS_SPECIFIC(thistype)->nfn_fields_total
 814 #define TYPE_NTEMPLATE_ARGS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->ntemplate_args
 815 #define TYPE_NINSTANTIATIONS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->ninstantiations
 816 #define TYPE_DECLARED_TYPE(thistype) TYPE_CPLUS_SPECIFIC(thistype)->declared_type
 817 #define TYPE_TYPE_SPECIFIC(thistype) TYPE_MAIN_TYPE(thistype)->type_specific
 818 #define TYPE_CPLUS_SPECIFIC(thistype) TYPE_MAIN_TYPE(thistype)->type_specific.cplus_stuff
 819 #define TYPE_FLOATFORMAT(thistype) TYPE_MAIN_TYPE(thistype)->type_specific.floatformat
 820 #define TYPE_CALLING_CONVENTION(thistype) TYPE_MAIN_TYPE(thistype)->type_specific.calling_convention
 821 #define TYPE_BASECLASS(thistype,index) TYPE_MAIN_TYPE(thistype)->fields[index].type
 822 #define TYPE_N_BASECLASSES(thistype) TYPE_CPLUS_SPECIFIC(thistype)->n_baseclasses
 823 #define TYPE_BASECLASS_NAME(thistype,index) TYPE_MAIN_TYPE(thistype)->fields[index].name
 824 #define TYPE_BASECLASS_BITPOS(thistype,index) TYPE_FIELD_BITPOS(thistype,index)
 825 #define BASETYPE_VIA_PUBLIC(thistype, index) \
 826   ((!TYPE_FIELD_PRIVATE(thistype, index)) && (!TYPE_FIELD_PROTECTED(thistype, index)))
 827
 828 #define BASETYPE_VIA_VIRTUAL(thistype, index) \
 829   (TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits == NULL ? 0 \
 830     : B_TST(TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits, (index)))
 831
 832 #define FIELD_TYPE(thisfld) ((thisfld).type)
 833 #define FIELD_NAME(thisfld) ((thisfld).name)
 834 #define FIELD_BITPOS(thisfld) ((thisfld).loc.bitpos)
 835 #define FIELD_ARTIFICIAL(thisfld) ((thisfld).artificial)
 836 #define FIELD_BITSIZE(thisfld) ((thisfld).bitsize)
 837 #define FIELD_STATIC_KIND(thisfld) ((thisfld).static_kind)
 838 #define FIELD_PHYSNAME(thisfld) ((thisfld).loc.physname)
 839 #define FIELD_PHYSADDR(thisfld) ((thisfld).loc.physaddr)
 840 #define SET_FIELD_PHYSNAME(thisfld, name) \
 841   ((thisfld).static_kind = 1, FIELD_PHYSNAME(thisfld) = (name))
 842 #define SET_FIELD_PHYSADDR(thisfld, name) \
 843   ((thisfld).static_kind = 2, FIELD_PHYSADDR(thisfld) = (name))
 844 #define TYPE_FIELD(thistype, n) TYPE_MAIN_TYPE(thistype)->fields[n]
 845 #define TYPE_FIELD_TYPE(thistype, n) FIELD_TYPE(TYPE_FIELD(thistype, n))
 846 #define TYPE_FIELD_NAME(thistype, n) FIELD_NAME(TYPE_FIELD(thistype, n))
 847 #define TYPE_FIELD_BITPOS(thistype, n) FIELD_BITPOS(TYPE_FIELD(thistype,n))
 848 #define TYPE_FIELD_ARTIFICIAL(thistype, n) FIELD_ARTIFICIAL(TYPE_FIELD(thistype,n))
 849 #define TYPE_FIELD_BITSIZE(thistype, n) FIELD_BITSIZE(TYPE_FIELD(thistype,n))
 850 #define TYPE_FIELD_PACKED(thistype, n) (FIELD_BITSIZE(TYPE_FIELD(thistype,n))!=0)
 851 #define TYPE_TEMPLATE_ARG(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->template_args[n]
 852 #define TYPE_INSTANTIATION(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->instantiations[n]
 853
 854 #define TYPE_FIELD_PRIVATE_BITS(thistype) \
 855   TYPE_CPLUS_SPECIFIC(thistype)->private_field_bits
 856 #define TYPE_FIELD_PROTECTED_BITS(thistype) \
 857   TYPE_CPLUS_SPECIFIC(thistype)->protected_field_bits
 858 #define TYPE_FIELD_IGNORE_BITS(thistype) \
 859   TYPE_CPLUS_SPECIFIC(thistype)->ignore_field_bits
 860 #define TYPE_FIELD_VIRTUAL_BITS(thistype) \
 861   TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits
 862 #define SET_TYPE_FIELD_PRIVATE(thistype, n) \
 863   B_SET (TYPE_CPLUS_SPECIFIC(thistype)->private_field_bits, (n))
 864 #define SET_TYPE_FIELD_PROTECTED(thistype, n) \
 865   B_SET (TYPE_CPLUS_SPECIFIC(thistype)->protected_field_bits, (n))
 866 #define SET_TYPE_FIELD_IGNORE(thistype, n) \
 867   B_SET (TYPE_CPLUS_SPECIFIC(thistype)->ignore_field_bits, (n))
 868 #define SET_TYPE_FIELD_VIRTUAL(thistype, n) \
 869   B_SET (TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits, (n))
 870 #define TYPE_FIELD_PRIVATE(thistype, n) \
 871   (TYPE_CPLUS_SPECIFIC(thistype)->private_field_bits == NULL ? 0 \
 872     : B_TST(TYPE_CPLUS_SPECIFIC(thistype)->private_field_bits, (n)))
 873 #define TYPE_FIELD_PROTECTED(thistype, n) \
 874   (TYPE_CPLUS_SPECIFIC(thistype)->protected_field_bits == NULL ? 0 \
 875     : B_TST(TYPE_CPLUS_SPECIFIC(thistype)->protected_field_bits, (n)))
 876 #define TYPE_FIELD_IGNORE(thistype, n) \
 877   (TYPE_CPLUS_SPECIFIC(thistype)->ignore_field_bits == NULL ? 0 \
 878     : B_TST(TYPE_CPLUS_SPECIFIC(thistype)->ignore_field_bits, (n)))
 879 #define TYPE_FIELD_VIRTUAL(thistype, n) \
 880   (TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits == NULL ? 0 \
 881     : B_TST(TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits, (n)))
 882
 883 #define TYPE_FIELD_STATIC(thistype, n) (TYPE_MAIN_TYPE (thistype)->fields[n].static_kind != 0)
 884 #define TYPE_FIELD_STATIC_KIND(thistype, n) TYPE_MAIN_TYPE (thistype)->fields[n].static_kind
 885 #define TYPE_FIELD_STATIC_HAS_ADDR(thistype, n) (TYPE_MAIN_TYPE (thistype)->fields[n].static_kind == 2)
 886 #define TYPE_FIELD_STATIC_PHYSNAME(thistype, n) FIELD_PHYSNAME(TYPE_FIELD(thistype, n))
 887 #define TYPE_FIELD_STATIC_PHYSADDR(thistype, n) FIELD_PHYSADDR(TYPE_FIELD(thistype, n))
 888
 889 #define TYPE_FN_FIELDLISTS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists
 890 #define TYPE_FN_FIELDLIST(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists[n]
 891 #define TYPE_FN_FIELDLIST1(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists[n].fn_fields
 892 #define TYPE_FN_FIELDLIST_NAME(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists[n].name
 893 #define TYPE_FN_FIELDLIST_LENGTH(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists[n].length
 894
 895 #define TYPE_FN_FIELD(thisfn, n) (thisfn)[n]
 896 #define TYPE_FN_FIELD_PHYSNAME(thisfn, n) (thisfn)[n].physname
 897 #define TYPE_FN_FIELD_TYPE(thisfn, n) (thisfn)[n].type
 898 #define TYPE_FN_FIELD_ARGS(thisfn, n) TYPE_FIELDS ((thisfn)[n].type)
 899 #define TYPE_FN_FIELD_CONST(thisfn, n) ((thisfn)[n].is_const)
 900 #define TYPE_FN_FIELD_VOLATILE(thisfn, n) ((thisfn)[n].is_volatile)
 901 #define TYPE_FN_FIELD_PRIVATE(thisfn, n) ((thisfn)[n].is_private)
 902 #define TYPE_FN_FIELD_PROTECTED(thisfn, n) ((thisfn)[n].is_protected)
 903 #define TYPE_FN_FIELD_PUBLIC(thisfn, n) ((thisfn)[n].is_public)
 904 #define TYPE_FN_FIELD_STATIC(thisfn, n) ((thisfn)[n].is_static)
 905 #define TYPE_FN_FIELD_FINAL(thisfn, n) ((thisfn)[n].is_final)
 906 #define TYPE_FN_FIELD_SYNCHRONIZED(thisfn, n) ((thisfn)[n].is_synchronized)
 907 #define TYPE_FN_FIELD_NATIVE(thisfn, n) ((thisfn)[n].is_native)
 908 #define TYPE_FN_FIELD_ARTIFICIAL(thisfn, n) ((thisfn)[n].is_artificial)
 909 #define TYPE_FN_FIELD_ABSTRACT(thisfn, n) ((thisfn)[n].is_abstract)
 910 #define TYPE_FN_FIELD_STUB(thisfn, n) ((thisfn)[n].is_stub)
 911 #define TYPE_FN_FIELD_INLINED(thisfn, n) ((thisfn)[n].is_inlined)
 912 #define TYPE_FN_FIELD_FCONTEXT(thisfn, n) ((thisfn)[n].fcontext)
 913 #define TYPE_FN_FIELD_VOFFSET(thisfn, n) ((thisfn)[n].voffset-2)
 914 #define TYPE_FN_FIELD_VIRTUAL_P(thisfn, n) ((thisfn)[n].voffset > 1)
 915 #define TYPE_FN_FIELD_STATIC_P(thisfn, n) ((thisfn)[n].voffset == VOFFSET_STATIC)
 916
 917 #define TYPE_LOCALTYPE_PTR(thistype) (TYPE_CPLUS_SPECIFIC(thistype)->localtype_ptr)
 918 #define TYPE_LOCALTYPE_FILE(thistype) (TYPE_CPLUS_SPECIFIC(thistype)->localtype_ptr->file)
 919 #define TYPE_LOCALTYPE_LINE(thistype) (TYPE_CPLUS_SPECIFIC(thistype)->localtype_ptr->line)
 920
 921 #define TYPE_IS_OPAQUE(thistype) (((TYPE_CODE (thistype) == TYPE_CODE_STRUCT) ||        \
 922                                    (TYPE_CODE (thistype) == TYPE_CODE_UNION))        && \
 923                                   (TYPE_NFIELDS (thistype) == 0)                     && \
 924                                   (TYPE_CPLUS_SPECIFIC (thistype) && (TYPE_NFN_FIELDS (thistype) == 0)) && \
 925                                   (TYPE_STUB (thistype) || !TYPE_STUB_SUPPORTED (thistype)))
 926
 927 struct builtin_type
 928 {
 929   /* Address/pointer types.  */
 930
 931   /* `pointer to data' type.  Some target platforms use an implicitly
 932      {sign,zero} -extended 32-bit ABI pointer on a 64-bit ISA.  */
 933   struct type *builtin_data_ptr;
 934
 935   /* `pointer to function (returning void)' type.  Harvard
 936      architectures mean that ABI function and code pointers are not
 937      interconvertible.  Similarly, since ANSI, C standards have
 938      explicitly said that pointers to functions and pointers to data
 939      are not interconvertible --- that is, you can't cast a function
 940      pointer to void * and back, and expect to get the same value.
 941      However, all function pointer types are interconvertible, so void
 942      (*) () can server as a generic function pointer.  */
 943   struct type *builtin_func_ptr;
 944
 945   /* The target CPU's address type.  This is the ISA address size.  */
 946   struct type *builtin_core_addr;
 947
 948
 949   /* Types used for symbols with no debug information.  */
 950   struct type *nodebug_text_symbol;
 951   struct type *nodebug_data_symbol;
 952   struct type *nodebug_unknown_symbol;
 953   struct type *nodebug_tls_symbol;
 954
 955
 956   /* Integral types.  */
 957
 958   /* We use these for the '/c' print format, because c_char is just a
 959      one-byte integral type, which languages less laid back than C
 960      will print as ... well, a one-byte integral type.  */
 961   struct type *builtin_true_char;
 962   struct type *builtin_true_unsigned_char;
 963
 964   /* Implicit size/sign (based on the the architecture's ABI).  */
 965   struct type *builtin_void;
 966   struct type *builtin_char;
 967   struct type *builtin_short;
 968   struct type *builtin_int;
 969   struct type *builtin_long;
 970   struct type *builtin_signed_char;
 971   struct type *builtin_unsigned_char;
 972   struct type *builtin_unsigned_short;
 973   struct type *builtin_unsigned_int;
 974   struct type *builtin_unsigned_long;
 975   struct type *builtin_float;
 976   struct type *builtin_double;
 977   struct type *builtin_long_double;
 978   struct type *builtin_complex;
 979   struct type *builtin_double_complex;
 980   struct type *builtin_string;
 981   struct type *builtin_bool;
 982   struct type *builtin_long_long;
 983   struct type *builtin_unsigned_long_long;
 984   struct type *builtin_decfloat;
 985   struct type *builtin_decdouble;
 986   struct type *builtin_declong;
 987 };
 988
 989 /* Return the type table for the specified architecture.  */
 990 extern const struct builtin_type *builtin_type (struct gdbarch *gdbarch);
 991
 992 /* Compatibility macros to access types for the current architecture.  */
 993 #define builtin_type_void_data_ptr \
 994         (builtin_type (current_gdbarch)->builtin_data_ptr)
 995 #define builtin_type_void_func_ptr \
 996         (builtin_type (current_gdbarch)->builtin_func_ptr)
 997 #define builtin_type_CORE_ADDR \
 998         (builtin_type (current_gdbarch)->builtin_core_addr)
 999 #define builtin_type_true_char \
1000         (builtin_type (current_gdbarch)->builtin_true_char)
1001 #define builtin_type_void \
1002         (builtin_type (current_gdbarch)->builtin_void)
1003 #define builtin_type_char \
1004         (builtin_type (current_gdbarch)->builtin_char)
1005 #define builtin_type_short \
1006         (builtin_type (current_gdbarch)->builtin_short)
1007 #define builtin_type_int \
1008         (builtin_type (current_gdbarch)->builtin_int)
1009 #define builtin_type_long \
1010         (builtin_type (current_gdbarch)->builtin_long)
1011 #define builtin_type_signed_char \
1012         (builtin_type (current_gdbarch)->builtin_signed_char)
1013 #define builtin_type_unsigned_char \
1014         (builtin_type (current_gdbarch)->builtin_unsigned_char)
1015 #define builtin_type_unsigned_short \
1016         (builtin_type (current_gdbarch)->builtin_unsigned_short)
1017 #define builtin_type_unsigned_int \
1018         (builtin_type (current_gdbarch)->builtin_unsigned_int)
1019 #define builtin_type_unsigned_long \
1020         (builtin_type (current_gdbarch)->builtin_unsigned_long)
1021 #define builtin_type_float \
1022         (builtin_type (current_gdbarch)->builtin_float)
1023 #define builtin_type_double \
1024         (builtin_type (current_gdbarch)->builtin_double)
1025 #define builtin_type_long_double \
1026         (builtin_type (current_gdbarch)->builtin_long_double)
1027 #define builtin_type_complex \
1028         (builtin_type (current_gdbarch)->builtin_complex)
1029 #define builtin_type_double_complex \
1030         (builtin_type (current_gdbarch)->builtin_double_complex)
1031 #define builtin_type_string \
1032         (builtin_type (current_gdbarch)->builtin_string)
1033 #define builtin_type_bool \
1034         (builtin_type (current_gdbarch)->builtin_bool)
1035 #define builtin_type_long_long \
1036         (builtin_type (current_gdbarch)->builtin_long_long)
1037 #define builtin_type_unsigned_long_long \
1038         (builtin_type (current_gdbarch)->builtin_unsigned_long_long)
1039
1040
1041 /* Explicit sizes - see C9X <intypes.h> for naming scheme.  The "int0"
1042    is for when an architecture needs to describe a register that has
1043    no size.  */
1044 extern struct type *builtin_type_int0;
1045 extern struct type *builtin_type_int8;
1046 extern struct type *builtin_type_uint8;
1047 extern struct type *builtin_type_int16;
1048 extern struct type *builtin_type_uint16;
1049 extern struct type *builtin_type_int32;
1050 extern struct type *builtin_type_uint32;
1051 extern struct type *builtin_type_int64;
1052 extern struct type *builtin_type_uint64;
1053 extern struct type *builtin_type_int128;
1054 extern struct type *builtin_type_uint128;
1055
1056 /* Explicit floating-point formats.  See "floatformat.h".  */
1057 extern const struct floatformat *floatformats_ieee_single[BFD_ENDIAN_UNKNOWN];
1058 extern const struct floatformat *floatformats_ieee_double[BFD_ENDIAN_UNKNOWN];
1059 extern const struct floatformat *floatformats_ieee_double_littlebyte_bigword[BFD_ENDIAN_UNKNOWN];
1060 extern const struct floatformat *floatformats_i387_ext[BFD_ENDIAN_UNKNOWN];
1061 extern const struct floatformat *floatformats_m68881_ext[BFD_ENDIAN_UNKNOWN];
1062 extern const struct floatformat *floatformats_arm_ext[BFD_ENDIAN_UNKNOWN];
1063 extern const struct floatformat *floatformats_ia64_spill[BFD_ENDIAN_UNKNOWN];
1064 extern const struct floatformat *floatformats_ia64_quad[BFD_ENDIAN_UNKNOWN];
1065 extern const struct floatformat *floatformats_vax_f[BFD_ENDIAN_UNKNOWN];
1066 extern const struct floatformat *floatformats_vax_d[BFD_ENDIAN_UNKNOWN];
1067 extern const struct floatformat *floatformats_ibm_long_double[BFD_ENDIAN_UNKNOWN];
1068
1069 extern struct type *builtin_type_ieee_single;
1070 extern struct type *builtin_type_ieee_double;
1071 extern struct type *builtin_type_i387_ext;
1072 extern struct type *builtin_type_m68881_ext;
1073 extern struct type *builtin_type_arm_ext;
1074 extern struct type *builtin_type_ia64_spill;
1075 extern struct type *builtin_type_ia64_quad;
1076
1077 /* This type represents a type that was unrecognized in symbol
1078    read-in.  */
1079
1080 extern struct type *builtin_type_error;
1081
1082
1083 /* Modula-2 types */
1084
1085 struct builtin_m2_type
1086 {
1087   struct type *builtin_char;
1088   struct type *builtin_int;
1089   struct type *builtin_card;
1090   struct type *builtin_real;
1091   struct type *builtin_bool;
1092 };
1093
1094 /* Return the Modula-2 type table for the specified architecture.  */
1095 extern const struct builtin_m2_type *builtin_m2_type (struct gdbarch *gdbarch);
1096
1097 /* Compatibility macros to access types for the current architecture.  */
1098 #define builtin_type_m2_char \
1099         (builtin_m2_type (current_gdbarch)->builtin_char)
1100 #define builtin_type_m2_int \
1101         (builtin_m2_type (current_gdbarch)->builtin_int)
1102 #define builtin_type_m2_card \
1103         (builtin_m2_type (current_gdbarch)->builtin_card)
1104 #define builtin_type_m2_real \
1105         (builtin_m2_type (current_gdbarch)->builtin_real)
1106 #define builtin_type_m2_bool \
1107         (builtin_m2_type (current_gdbarch)->builtin_bool)
1108
1109
1110 /* Fortran (F77) types */
1111
1112 struct builtin_f_type
1113 {
1114   struct type *builtin_character;
1115   struct type *builtin_integer;
1116   struct type *builtin_integer_s2;
1117   struct type *builtin_logical;
1118   struct type *builtin_logical_s1;
1119   struct type *builtin_logical_s2;
1120   struct type *builtin_real;
1121   struct type *builtin_real_s8;
1122   struct type *builtin_real_s16;
1123   struct type *builtin_complex_s8;
1124   struct type *builtin_complex_s16;
1125   struct type *builtin_complex_s32;
1126   struct type *builtin_void;
1127 };
1128
1129 /* Return the Fortran type table for the specified architecture.  */
1130 extern const struct builtin_f_type *builtin_f_type (struct gdbarch *gdbarch);
1131
1132 /* Compatibility macros to access types for the current architecture.  */
1133 #define builtin_type_f_character \
1134         (builtin_f_type (current_gdbarch)->builtin_character)
1135 #define builtin_type_f_integer \
1136         (builtin_f_type (current_gdbarch)->builtin_integer)
1137 #define builtin_type_f_integer_s2 \
1138         (builtin_f_type (current_gdbarch)->builtin_integer_s2)
1139 #define builtin_type_f_logical \
1140         (builtin_f_type (current_gdbarch)->builtin_logical)
1141 #define builtin_type_f_logical_s1 \
1142         (builtin_f_type (current_gdbarch)->builtin_logical_s1)
1143 #define builtin_type_f_logical_s2 \
1144         (builtin_f_type (current_gdbarch)->builtin_logical_s2)
1145 #define builtin_type_f_real \
1146         (builtin_f_type (current_gdbarch)->builtin_real)
1147 #define builtin_type_f_real_s8 \
1148         (builtin_f_type (current_gdbarch)->builtin_real_s8)
1149 #define builtin_type_f_real_s16 \
1150         (builtin_f_type (current_gdbarch)->builtin_real_s16)
1151 #define builtin_type_f_complex_s8 \
1152         (builtin_f_type (current_gdbarch)->builtin_complex_s8)
1153 #define builtin_type_f_complex_s16 \
1154         (builtin_f_type (current_gdbarch)->builtin_complex_s16)
1155 #define builtin_type_f_complex_s32 \
1156         (builtin_f_type (current_gdbarch)->builtin_complex_s32)
1157 #define builtin_type_f_void \
1158         (builtin_f_type (current_gdbarch)->builtin_void)
1159
1160
1161 /* RTTI for C++ */
1162 /* extern struct type *builtin_type_cxx_typeinfo; */
1163
1164 /* Maximum and minimum values of built-in types */
1165
1166 #define MAX_OF_TYPE(t)  \
1167    (TYPE_UNSIGNED(t) ? UMAX_OF_SIZE(TYPE_LENGTH(t)) \
1168     : MAX_OF_SIZE(TYPE_LENGTH(t)))
1169
1170 #define MIN_OF_TYPE(t)  \
1171    (TYPE_UNSIGNED(t) ? UMIN_OF_SIZE(TYPE_LENGTH(t)) \
1172     : MIN_OF_SIZE(TYPE_LENGTH(t)))
1173
1174 /* Allocate space for storing data associated with a particular type.
1175    We ensure that the space is allocated using the same mechanism that
1176    was used to allocate the space for the type structure itself.  I.E.
1177    if the type is on an objfile's objfile_obstack, then the space for data
1178    associated with that type will also be allocated on the objfile_obstack.
1179    If the type is not associated with any particular objfile (such as
1180    builtin types), then the data space will be allocated with xmalloc,
1181    the same as for the type structure. */
1182
1183 #define TYPE_ALLOC(t,size)  \
1184    (TYPE_OBJFILE (t) != NULL  \
1185     ? obstack_alloc (&TYPE_OBJFILE (t) -> objfile_obstack, size) \
1186     : xmalloc (size))
1187
1188 #define TYPE_ZALLOC(t,size)  \
1189    (TYPE_OBJFILE (t) != NULL  \
1190     ? memset (obstack_alloc (&TYPE_OBJFILE (t)->objfile_obstack, size),  \
1191               0, size)  \
1192     : xzalloc (size))
1193
1194 extern struct type *alloc_type (struct objfile *);
1195
1196 extern struct type *init_type (enum type_code, int, int, char *,
1197                                struct objfile *);
1198
1199 /* Helper functions to construct a struct or record type.  An
1200    initially empty type is created using init_composite_type().
1201    Fields are then added using append_struct_type_field().  A union
1202    type has its size set to the largest field.  A struct type has each
1203    field packed against the previous.  */
1204
1205 extern struct type *init_composite_type (char *name, enum type_code code);
1206 extern void append_composite_type_field (struct type *t, char *name,
1207                                          struct type *field);
1208
1209 /* Helper functions to construct a bit flags type.  An initially empty
1210    type is created using init_flag_type().  Flags are then added using
1211    append_flag_type_flag().  */
1212 extern struct type *init_flags_type (char *name, int length);
1213 extern void append_flags_type_flag (struct type *type, int bitpos, char *name);
1214
1215 extern void make_vector_type (struct type *array_type);
1216 extern struct type *init_vector_type (struct type *elt_type, int n);
1217
1218 extern struct type *lookup_reference_type (struct type *);
1219
1220 extern struct type *make_reference_type (struct type *, struct type **);
1221
1222 extern struct type *make_cv_type (int, int, struct type *, struct type **);
1223
1224 extern void replace_type (struct type *, struct type *);
1225
1226 extern int address_space_name_to_int (char *);
1227
1228 extern const char *address_space_int_to_name (int);
1229
1230 extern struct type *make_type_with_address_space (struct type *type,
1231                                                   int space_identifier);
1232
1233 extern struct type *lookup_memberptr_type (struct type *, struct type *);
1234
1235 extern struct type *lookup_methodptr_type (struct type *);
1236
1237 extern void smash_to_method_type (struct type *type, struct type *domain,
1238                                   struct type *to_type, struct field *args,
1239                                   int nargs, int varargs);
1240
1241 extern void smash_to_memberptr_type (struct type *, struct type *,
1242                                      struct type *);
1243
1244 extern struct type *allocate_stub_method (struct type *);
1245
1246 extern char *type_name_no_tag (const struct type *);
1247
1248 extern struct type *lookup_struct_elt_type (struct type *, char *, int);
1249
1250 extern struct type *make_pointer_type (struct type *, struct type **);
1251
1252 extern struct type *lookup_pointer_type (struct type *);
1253
1254 extern struct type *make_function_type (struct type *, struct type **);
1255
1256 extern struct type *lookup_function_type (struct type *);
1257
1258 extern struct type *create_range_type (struct type *, struct type *, int,
1259                                        int);
1260
1261 extern struct type *create_array_type (struct type *, struct type *,
1262                                        struct type *);
1263
1264 extern struct type *create_string_type (struct type *, struct type *);
1265
1266 extern struct type *create_set_type (struct type *, struct type *);
1267
1268 extern struct type *lookup_unsigned_typename (char *);
1269
1270 extern struct type *lookup_signed_typename (char *);
1271
1272 extern struct type *check_typedef (struct type *);
1273
1274 #define CHECK_TYPEDEF(TYPE) (TYPE) = check_typedef (TYPE)
1275
1276 extern void check_stub_method_group (struct type *, int);
1277
1278 extern char *gdb_mangle_name (struct type *, int, int);
1279
1280 extern struct type *lookup_typename (char *, struct block *, int);
1281
1282 extern struct type *lookup_template_type (char *, struct type *,
1283                                           struct block *);
1284
1285 extern int get_vptr_fieldno (struct type *, struct type **);
1286
1287 extern int get_destructor_fn_field (struct type *, int *, int *);
1288
1289 extern int get_discrete_bounds (struct type *, LONGEST *, LONGEST *);
1290
1291 extern int is_ancestor (struct type *, struct type *);
1292
1293 /* Overload resolution */
1294
1295 #define LENGTH_MATCH(bv) ((bv)->rank[0])
1296
1297 /* Badness if parameter list length doesn't match arg list length */
1298 #define LENGTH_MISMATCH_BADNESS      100
1299 /* Dummy badness value for nonexistent parameter positions */
1300 #define TOO_FEW_PARAMS_BADNESS       100
1301 /* Badness if no conversion among types */
1302 #define INCOMPATIBLE_TYPE_BADNESS    100
1303
1304 /* Badness of integral promotion */
1305 #define INTEGER_PROMOTION_BADNESS      1
1306 /* Badness of floating promotion */
1307 #define FLOAT_PROMOTION_BADNESS        1
1308 /* Badness of integral conversion */
1309 #define INTEGER_CONVERSION_BADNESS     2
1310 /* Badness of floating conversion */
1311 #define FLOAT_CONVERSION_BADNESS       2
1312 /* Badness of integer<->floating conversions */
1313 #define INT_FLOAT_CONVERSION_BADNESS   2
1314 /* Badness of converting to a boolean */
1315 #define BOOLEAN_CONVERSION_BADNESS     2
1316 /* Badness of pointer conversion */
1317 #define POINTER_CONVERSION_BADNESS     2
1318 /* Badness of conversion of pointer to void pointer */
1319 #define VOID_PTR_CONVERSION_BADNESS    2
1320 /* Badness of converting derived to base class */
1321 #define BASE_CONVERSION_BADNESS        2
1322 /* Badness of converting from non-reference to reference */
1323 #define REFERENCE_CONVERSION_BADNESS   2
1324
1325 /* Non-standard conversions allowed by the debugger */
1326 /* Converting a pointer to an int is usually OK */
1327 #define NS_POINTER_CONVERSION_BADNESS 10
1328
1329
1330 extern int compare_badness (struct badness_vector *, struct badness_vector *);
1331
1332 extern struct badness_vector *rank_function (struct type **, int,
1333                                              struct type **, int);
1334
1335 extern int rank_one_type (struct type *, struct type *);
1336
1337 extern void recursive_dump_type (struct type *, int);
1338
1339 /* printcmd.c */
1340
1341 extern void print_scalar_formatted (const void *, struct type *, int, int,
1342                                     struct ui_file *);
1343
1344 extern int can_dereference (struct type *);
1345
1346 extern int is_integral_type (struct type *);
1347
1348 extern void maintenance_print_type (char *, int);
1349
1350 extern htab_t create_copied_types_hash (struct objfile *objfile);
1351
1352 extern struct type *copy_type_recursive (struct objfile *objfile,
1353                                          struct type *type,
1354                                          htab_t copied_types);
1355
1356 #endif /* GDBTYPES_H */