gdb/gdbtypes.h

   1 /* Internal type definitions for GDB.
   2
   3    Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   4    2001, 2002, 2003, 2004, 2006 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 2 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, write to the Free Software
  22    Foundation, Inc., 51 Franklin Street, Fifth Floor,
  23    Boston, MA 02110-1301, USA.  */
  24
  25 #if !defined (GDBTYPES_H)
  26 #define GDBTYPES_H 1
  27
  28 #include "hashtab.h"
  29
  30 /* Forward declarations for prototypes.  */
  31 struct field;
  32 struct block;
  33
  34 /* Codes for `fundamental types'.  This is a monstrosity based on the
  35    bogus notion that there are certain compiler-independent
  36    `fundamental types'.  None of these is well-defined (how big is
  37    FT_SHORT?  Does it depend on the language?  How does the
  38    language-specific code know which type to correlate to FT_SHORT?)  */
  39
  40 #define FT_VOID                 0
  41 #define FT_BOOLEAN              1
  42 #define FT_CHAR                 2       /* we use this for not-unsigned C/C++ chars */
  43 #define FT_SIGNED_CHAR          3       /* we use this for C++ signed chars */
  44 #define FT_UNSIGNED_CHAR        4       /* we use this for C/C++ unsigned chars */
  45 #define FT_SHORT                5
  46 #define FT_SIGNED_SHORT         6
  47 #define FT_UNSIGNED_SHORT       7
  48 #define FT_INTEGER              8
  49 #define FT_SIGNED_INTEGER       9
  50 #define FT_UNSIGNED_INTEGER     10
  51 #define FT_LONG                 11
  52 #define FT_SIGNED_LONG          12
  53 #define FT_UNSIGNED_LONG        13
  54 #define FT_LONG_LONG            14
  55 #define FT_SIGNED_LONG_LONG     15
  56 #define FT_UNSIGNED_LONG_LONG   16
  57 #define FT_FLOAT                17
  58 #define FT_DBL_PREC_FLOAT       18
  59 #define FT_EXT_PREC_FLOAT       19
  60 #define FT_COMPLEX              20
  61 #define FT_DBL_PREC_COMPLEX     21
  62 #define FT_EXT_PREC_COMPLEX     22
  63 #define FT_STRING               23
  64 #define FT_FIXED_DECIMAL        24
  65 #define FT_FLOAT_DECIMAL        25
  66 #define FT_BYTE                 26
  67 #define FT_UNSIGNED_BYTE        27
  68 #define FT_TEMPLATE_ARG         28
  69
  70 #define FT_NUM_MEMBERS          29      /* Highest FT_* above, plus one. */
  71
  72 /* Some macros for char-based bitfields.  */
  73
  74 #define B_SET(a,x)      ((a)[(x)>>3] |= (1 << ((x)&7)))
  75 #define B_CLR(a,x)      ((a)[(x)>>3] &= ~(1 << ((x)&7)))
  76 #define B_TST(a,x)      ((a)[(x)>>3] & (1 << ((x)&7)))
  77 #define B_TYPE          unsigned char
  78 #define B_BYTES(x)      ( 1 + ((x)>>3) )
  79 #define B_CLRALL(a,x)   memset ((a), 0, B_BYTES(x))
  80
  81 /* Different kinds of data types are distinguished by the `code' field.  */
  82
  83 enum type_code
  84   {
  85     TYPE_CODE_UNDEF,            /* Not used; catches errors */
  86     TYPE_CODE_PTR,              /* Pointer type */
  87
  88     /* Array type with lower & upper bounds.
  89
  90        Regardless of the language, GDB represents multidimensional
  91        array types the way C does: as arrays of arrays.  So an
  92        instance of a GDB array type T can always be seen as a series
  93        of instances of TYPE_TARGET_TYPE (T) laid out sequentially in
  94        memory.
  95
  96        Row-major languages like C lay out multi-dimensional arrays so
  97        that incrementing the rightmost index in a subscripting
  98        expression results in the smallest change in the address of the
  99        element referred to.  Column-major languages like Fortran lay
 100        them out so that incrementing the leftmost index results in the
 101        smallest change.
 102
 103        This means that, in column-major languages, working our way
 104        from type to target type corresponds to working through indices
 105        from right to left, not left to right.  */
 106     TYPE_CODE_ARRAY,
 107
 108     TYPE_CODE_STRUCT,           /* C struct or Pascal record */
 109     TYPE_CODE_UNION,            /* C union or Pascal variant part */
 110     TYPE_CODE_ENUM,             /* Enumeration type */
 111     TYPE_CODE_FLAGS,            /* Bit flags type */
 112     TYPE_CODE_FUNC,             /* Function type */
 113     TYPE_CODE_INT,              /* Integer type */
 114
 115     /* Floating type.  This is *NOT* a complex type.  Beware, there are parts
 116        of GDB which bogusly assume that TYPE_CODE_FLT can mean complex.  */
 117     TYPE_CODE_FLT,
 118
 119     /* Void type.  The length field specifies the length (probably always
 120        one) which is used in pointer arithmetic involving pointers to
 121        this type, but actually dereferencing such a pointer is invalid;
 122        a void type has no length and no actual representation in memory
 123        or registers.  A pointer to a void type is a generic pointer.  */
 124     TYPE_CODE_VOID,
 125
 126     TYPE_CODE_SET,              /* Pascal sets */
 127     TYPE_CODE_RANGE,            /* Range (integers within spec'd bounds) */
 128
 129     /* A string type which is like an array of character but prints
 130        differently (at least for (the deleted) CHILL).  It does not
 131        contain a length field as Pascal strings (for many Pascals,
 132        anyway) do; if we want to deal with such strings, we should use
 133        a new type code.  */
 134     TYPE_CODE_STRING,
 135
 136     /* String of bits; like TYPE_CODE_SET but prints differently (at
 137        least for (the deleted) CHILL).  */
 138     TYPE_CODE_BITSTRING,
 139
 140     /* Unknown type.  The length field is valid if we were able to
 141        deduce that much about the type, or 0 if we don't even know that.  */
 142     TYPE_CODE_ERROR,
 143
 144     /* C++ */
 145     TYPE_CODE_METHOD,           /* Method type */
 146
 147     /* Pointer-to-member-function type.  This describes how to access a
 148        particular member function of a class (possibly a virtual
 149        member function).  The representation may vary between different
 150        C++ ABIs.  */
 151     TYPE_CODE_METHODPTR,
 152
 153     /* Pointer-to-member type.  This is the offset within a class to some
 154        particular data member.  The only currently supported representation
 155        uses an unbiased offset, with -1 representing NULL; this is used
 156        by the Itanium C++ ABI (used by GCC on all platforms).  */
 157     TYPE_CODE_MEMBERPTR,
 158
 159     TYPE_CODE_REF,              /* C++ Reference types */
 160
 161     TYPE_CODE_CHAR,             /* *real* character type */
 162
 163     /* Boolean type.  0 is false, 1 is true, and other values are non-boolean
 164        (e.g. FORTRAN "logical" used as unsigned int).  */
 165     TYPE_CODE_BOOL,
 166
 167     /* Fortran */
 168     TYPE_CODE_COMPLEX,          /* Complex float */
 169
 170     TYPE_CODE_TYPEDEF,
 171     TYPE_CODE_TEMPLATE,         /* C++ template */
 172     TYPE_CODE_TEMPLATE_ARG,     /* C++ template arg */
 173
 174     TYPE_CODE_NAMESPACE         /* C++ namespace.  */
 175   };
 176
 177 /* For now allow source to use TYPE_CODE_CLASS for C++ classes, as an
 178    alias for TYPE_CODE_STRUCT.  This is for DWARF, which has a distinct
 179    "class" attribute.  Perhaps we should actually have a separate TYPE_CODE
 180    so that we can print "class" or "struct" depending on what the debug
 181    info said.  It's not clear we should bother.  */
 182
 183 #define TYPE_CODE_CLASS TYPE_CODE_STRUCT
 184
 185 /* Some bits for the type's flags word, and macros to test them. */
 186
 187 /* Unsigned integer type.  If this is not set for a TYPE_CODE_INT, the
 188    type is signed (unless TYPE_FLAG_NOSIGN (below) is set). */
 189
 190 #define TYPE_FLAG_UNSIGNED      (1 << 0)
 191 #define TYPE_UNSIGNED(t)        (TYPE_FLAGS (t) & TYPE_FLAG_UNSIGNED)
 192
 193 /* No sign for this type.  In C++, "char", "signed char", and "unsigned
 194    char" are distinct types; so we need an extra flag to indicate the
 195    absence of a sign! */
 196
 197 #define TYPE_FLAG_NOSIGN        (1 << 1)
 198 #define TYPE_NOSIGN(t)          (TYPE_FLAGS (t) & TYPE_FLAG_NOSIGN)
 199
 200 /* This appears in a type's flags word if it is a stub type (e.g., if
 201    someone referenced a type that wasn't defined in a source file
 202    via (struct sir_not_appearing_in_this_film *)).  */
 203
 204 #define TYPE_FLAG_STUB          (1 << 2)
 205 #define TYPE_STUB(t)            (TYPE_FLAGS (t) & TYPE_FLAG_STUB)
 206
 207 /* The target type of this type is a stub type, and this type needs to
 208    be updated if it gets un-stubbed in check_typedef.
 209    Used for arrays and ranges, in which TYPE_LENGTH of the array/range
 210    gets set based on the TYPE_LENGTH of the target type.
 211    Also, set for TYPE_CODE_TYPEDEF. */
 212
 213 #define TYPE_FLAG_TARGET_STUB   (1 << 3)
 214 #define TYPE_TARGET_STUB(t)     (TYPE_FLAGS (t) & TYPE_FLAG_TARGET_STUB)
 215
 216 /* Static type.  If this is set, the corresponding type had
 217  * a static modifier.
 218  * Note: This may be unnecessary, since static data members
 219  * are indicated by other means (bitpos == -1)
 220  */
 221
 222 #define TYPE_FLAG_STATIC        (1 << 4)
 223 #define TYPE_STATIC(t)          (TYPE_FLAGS (t) & TYPE_FLAG_STATIC)
 224
 225 /* Constant type.  If this is set, the corresponding type has a
 226  * const modifier.
 227  */
 228
 229 #define TYPE_FLAG_CONST         (1 << 5)
 230 #define TYPE_CONST(t)           (TYPE_INSTANCE_FLAGS (t) & TYPE_FLAG_CONST)
 231
 232 /* Volatile type.  If this is set, the corresponding type has a
 233  * volatile modifier.
 234  */
 235
 236 #define TYPE_FLAG_VOLATILE      (1 << 6)
 237 #define TYPE_VOLATILE(t)        (TYPE_INSTANCE_FLAGS (t) & TYPE_FLAG_VOLATILE)
 238
 239
 240 /* This is a function type which appears to have a prototype.  We need this
 241    for function calls in order to tell us if it's necessary to coerce the args,
 242    or to just do the standard conversions.  This is used with a short field. */
 243
 244 #define TYPE_FLAG_PROTOTYPED    (1 << 7)
 245 #define TYPE_PROTOTYPED(t)      (TYPE_FLAGS (t) & TYPE_FLAG_PROTOTYPED)
 246
 247 /* This flag is used to indicate that processing for this type
 248    is incomplete.
 249
 250    (Mostly intended for HP platforms, where class methods, for
 251    instance, can be encountered before their classes in the debug
 252    info; the incomplete type has to be marked so that the class and
 253    the method can be assigned correct types.) */
 254
 255 #define TYPE_FLAG_INCOMPLETE    (1 << 8)
 256 #define TYPE_INCOMPLETE(t)      (TYPE_FLAGS (t) & TYPE_FLAG_INCOMPLETE)
 257
 258 /* Instruction-space delimited type.  This is for Harvard architectures
 259    which have separate instruction and data address spaces (and perhaps
 260    others).
 261
 262    GDB usually defines a flat address space that is a superset of the
 263    architecture's two (or more) address spaces, but this is an extension
 264    of the architecture's model.
 265
 266    If TYPE_FLAG_INST is set, an object of the corresponding type
 267    resides in instruction memory, even if its address (in the extended
 268    flat address space) does not reflect this.
 269
 270    Similarly, if TYPE_FLAG_DATA is set, then an object of the
 271    corresponding type resides in the data memory space, even if
 272    this is not indicated by its (flat address space) address.
 273
 274    If neither flag is set, the default space for functions / methods
 275    is instruction space, and for data objects is data memory.  */
 276
 277 #define TYPE_FLAG_CODE_SPACE    (1 << 9)
 278 #define TYPE_CODE_SPACE(t)      (TYPE_INSTANCE_FLAGS (t) & TYPE_FLAG_CODE_SPACE)
 279
 280 #define TYPE_FLAG_DATA_SPACE    (1 << 10)
 281 #define TYPE_DATA_SPACE(t)      (TYPE_INSTANCE_FLAGS (t) & TYPE_FLAG_DATA_SPACE)
 282
 283 /* FIXME drow/2002-06-03:  Only used for methods, but applies as well
 284    to functions.  */
 285
 286 #define TYPE_FLAG_VARARGS       (1 << 11)
 287 #define TYPE_VARARGS(t)         (TYPE_FLAGS (t) & TYPE_FLAG_VARARGS)
 288
 289 /* Identify a vector type.  Gcc is handling this by adding an extra
 290    attribute to the array type.  We slurp that in as a new flag of a
 291    type.  This is used only in dwarf2read.c.  */
 292 #define TYPE_FLAG_VECTOR        (1 << 12)
 293 #define TYPE_VECTOR(t)          (TYPE_FLAGS (t) & TYPE_FLAG_VECTOR)
 294
 295 /* Address class flags.  Some environments provide for pointers whose
 296    size is different from that of a normal pointer or address types
 297    where the bits are interpreted differently than normal addresses.  The
 298    TYPE_FLAG_ADDRESS_CLASS_n flags may be used in target specific
 299    ways to represent these different types of address classes.  */
 300 #define TYPE_FLAG_ADDRESS_CLASS_1 (1 << 13)
 301 #define TYPE_ADDRESS_CLASS_1(t) (TYPE_INSTANCE_FLAGS(t) \
 302                                  & TYPE_FLAG_ADDRESS_CLASS_1)
 303 #define TYPE_FLAG_ADDRESS_CLASS_2 (1 << 14)
 304 #define TYPE_ADDRESS_CLASS_2(t) (TYPE_INSTANCE_FLAGS(t) \
 305                                  & TYPE_FLAG_ADDRESS_CLASS_2)
 306 #define TYPE_FLAG_ADDRESS_CLASS_ALL (TYPE_FLAG_ADDRESS_CLASS_1 \
 307                                      | TYPE_FLAG_ADDRESS_CLASS_2)
 308 #define TYPE_ADDRESS_CLASS_ALL(t) (TYPE_INSTANCE_FLAGS(t) \
 309                                    & TYPE_FLAG_ADDRESS_CLASS_ALL)
 310
 311 /* The debugging formats (especially STABS) do not contain enough information
 312    to represent all Ada types---especially those whose size depends on
 313    dynamic quantities.  Therefore, the GNAT Ada compiler includes
 314    extra information in the form of additional type definitions
 315    connected by naming conventions.  This flag indicates that the
 316    type is an ordinary (unencoded) GDB type that has been created from
 317    the necessary run-time information, and does not need further
 318    interpretation. Optionally marks ordinary, fixed-size GDB type. */
 319
 320 #define TYPE_FLAG_FIXED_INSTANCE (1 << 15)
 321
 322 /*  Array bound type.  */
 323 enum array_bound_type
 324 {
 325   BOUND_SIMPLE = 0,
 326   BOUND_BY_VALUE_IN_REG,
 327   BOUND_BY_REF_IN_REG,
 328   BOUND_BY_VALUE_ON_STACK,
 329   BOUND_BY_REF_ON_STACK,
 330   BOUND_CANNOT_BE_DETERMINED
 331 };
 332
 333 /* This structure is space-critical.
 334    Its layout has been tweaked to reduce the space used.  */
 335
 336 struct main_type
 337 {
 338   /* Code for kind of type */
 339
 340   ENUM_BITFIELD(type_code) code : 8;
 341
 342   /* Array bounds.  These fields appear at this location because
 343      they pack nicely here.  */
 344
 345   ENUM_BITFIELD(array_bound_type) upper_bound_type : 4;
 346   ENUM_BITFIELD(array_bound_type) lower_bound_type : 4;
 347
 348   /* Name of this type, or NULL if none.
 349
 350      This is used for printing only, except by poorly designed C++ code.
 351      For looking up a name, look for a symbol in the VAR_DOMAIN.  */
 352
 353   char *name;
 354
 355   /* Tag name for this type, or NULL if none.  This means that the
 356      name of the type consists of a keyword followed by the tag name.
 357      Which keyword is determined by the type code ("struct" for
 358      TYPE_CODE_STRUCT, etc.).  As far as I know C/C++ are the only languages
 359      with this feature.
 360
 361      This is used for printing only, except by poorly designed C++ code.
 362      For looking up a name, look for a symbol in the STRUCT_DOMAIN.
 363      One more legitimate use is that if TYPE_FLAG_STUB is set, this is
 364      the name to use to look for definitions in other files.  */
 365
 366   char *tag_name;
 367
 368   /* Every type is now associated with a particular objfile, and the
 369      type is allocated on the objfile_obstack for that objfile.  One problem
 370      however, is that there are times when gdb allocates new types while
 371      it is not in the process of reading symbols from a particular objfile.
 372      Fortunately, these happen when the type being created is a derived
 373      type of an existing type, such as in lookup_pointer_type().  So
 374      we can just allocate the new type using the same objfile as the
 375      existing type, but to do this we need a backpointer to the objfile
 376      from the existing type.  Yes this is somewhat ugly, but without
 377      major overhaul of the internal type system, it can't be avoided
 378      for now. */
 379
 380   struct objfile *objfile;
 381
 382   /* For a pointer type, describes the type of object pointed to.
 383      For an array type, describes the type of the elements.
 384      For a function or method type, describes the type of the return value.
 385      For a range type, describes the type of the full range.
 386      For a complex type, describes the type of each coordinate.
 387      Unused otherwise.  */
 388
 389   struct type *target_type;
 390
 391   /* Flags about this type.  */
 392
 393   int flags;
 394
 395   /* Number of fields described for this type */
 396
 397   short nfields;
 398
 399   /* Field number of the virtual function table pointer in
 400      VPTR_BASETYPE.  If -1, we were unable to find the virtual
 401      function table pointer in initial symbol reading, and
 402      fill_in_vptr_fieldno should be called to find it if possible.
 403
 404      Unused if this type does not have virtual functions.  */
 405
 406   short vptr_fieldno;
 407
 408   /* For structure and union types, a description of each field.
 409      For set and pascal array types, there is one "field",
 410      whose type is the domain type of the set or array.
 411      For range types, there are two "fields",
 412      the minimum and maximum values (both inclusive).
 413      For enum types, each possible value is described by one "field".
 414      For a function or method type, a "field" for each parameter.
 415      For C++ classes, there is one field for each base class (if it is
 416      a derived class) plus one field for each class data member.  Member
 417      functions are recorded elsewhere.
 418
 419      Using a pointer to a separate array of fields
 420      allows all types to have the same size, which is useful
 421      because we can allocate the space for a type before
 422      we know what to put in it.  */
 423
 424   struct field
 425   {
 426     union field_location
 427     {
 428       /* Position of this field, counting in bits from start of
 429          containing structure.
 430          For BITS_BIG_ENDIAN=1 targets, it is the bit offset to the MSB.
 431          For BITS_BIG_ENDIAN=0 targets, it is the bit offset to the LSB.
 432          For a range bound or enum value, this is the value itself. */
 433
 434       int bitpos;
 435
 436       /* For a static field, if TYPE_FIELD_STATIC_HAS_ADDR then physaddr
 437          is the location (in the target) of the static field.
 438          Otherwise, physname is the mangled label of the static field. */
 439
 440       CORE_ADDR physaddr;
 441       char *physname;
 442     }
 443     loc;
 444
 445     /* For a function or member type, this is 1 if the argument is marked
 446        artificial.  Artificial arguments should not be shown to the
 447        user.  */
 448     unsigned int artificial : 1;
 449
 450     /* This flag is zero for non-static fields, 1 for fields whose location
 451        is specified by the label loc.physname, and 2 for fields whose location
 452        is specified by loc.physaddr.  */
 453
 454     unsigned int static_kind : 2;
 455
 456     /* Size of this field, in bits, or zero if not packed.
 457        For an unpacked field, the field's type's length
 458        says how many bytes the field occupies.  */
 459
 460     unsigned int bitsize : 29;
 461
 462     /* In a struct or union type, type of this field.
 463        In a function or member type, type of this argument.
 464        In an array type, the domain-type of the array.  */
 465
 466     struct type *type;
 467
 468     /* Name of field, value or argument.
 469        NULL for range bounds, array domains, and member function
 470        arguments.  */
 471
 472     char *name;
 473
 474   } *fields;
 475
 476   /* For types with virtual functions (TYPE_CODE_STRUCT), VPTR_BASETYPE
 477      is the base class which defined the virtual function table pointer.
 478
 479      For types that are pointer to member types (TYPE_CODE_METHODPTR,
 480      TYPE_CODE_MEMBERPTR), VPTR_BASETYPE is the type that this pointer
 481      is a member of.
 482
 483      For method types (TYPE_CODE_METHOD), VPTR_BASETYPE is the aggregate
 484      type that contains the method.
 485
 486      Unused otherwise.  */
 487
 488   struct type *vptr_basetype;
 489
 490   /* Slot to point to additional language-specific fields of this type.  */
 491
 492   union type_specific
 493   {
 494     /* CPLUS_STUFF is for TYPE_CODE_STRUCT.  It is initialized to point to
 495        cplus_struct_default, a default static instance of a struct
 496        cplus_struct_type. */
 497
 498     struct cplus_struct_type *cplus_stuff;
 499
 500     /* FLOATFORMAT is for TYPE_CODE_FLT.  It is a pointer to the
 501        floatformat object that describes the floating-point value
 502        that resides within the type.  */
 503
 504     const struct floatformat *floatformat;
 505   } type_specific;
 506 };
 507
 508 /* A ``struct type'' describes a particular instance of a type, with
 509    some particular qualification.  */
 510 struct type
 511 {
 512   /* Type that is a pointer to this type.
 513      NULL if no such pointer-to type is known yet.
 514      The debugger may add the address of such a type
 515      if it has to construct one later.  */
 516
 517   struct type *pointer_type;
 518
 519   /* C++: also need a reference type.  */
 520
 521   struct type *reference_type;
 522
 523   /* Variant chain.  This points to a type that differs from this one only
 524      in qualifiers and length.  Currently, the possible qualifiers are
 525      const, volatile, code-space, data-space, and address class.  The
 526      length may differ only when one of the address class flags are set.
 527      The variants are linked in a circular ring and share MAIN_TYPE.  */
 528   struct type *chain;
 529
 530   /* Flags specific to this instance of the type, indicating where
 531      on the ring we are.  */
 532   int instance_flags;
 533
 534   /* Length of storage for a value of this type.  This is what
 535      sizeof(type) would return; use it for address arithmetic,
 536      memory reads and writes, etc.  This size includes padding.  For
 537      example, an i386 extended-precision floating point value really
 538      only occupies ten bytes, but most ABI's declare its size to be
 539      12 bytes, to preserve alignment.  A `struct type' representing
 540      such a floating-point type would have a `length' value of 12,
 541      even though the last two bytes are unused.
 542
 543      There's a bit of a host/target mess here, if you're concerned
 544      about machines whose bytes aren't eight bits long, or who don't
 545      have byte-addressed memory.  Various places pass this to memcpy
 546      and such, meaning it must be in units of host bytes.  Various
 547      other places expect they can calculate addresses by adding it
 548      and such, meaning it must be in units of target bytes.  For
 549      some DSP targets, in which HOST_CHAR_BIT will (presumably) be 8
 550      and TARGET_CHAR_BIT will be (say) 32, this is a problem.
 551
 552      One fix would be to make this field in bits (requiring that it
 553      always be a multiple of HOST_CHAR_BIT and TARGET_CHAR_BIT) ---
 554      the other choice would be to make it consistently in units of
 555      HOST_CHAR_BIT.  However, this would still fail to address
 556      machines based on a ternary or decimal representation.  */
 557
 558   unsigned length;
 559
 560   /* Core type, shared by a group of qualified types.  */
 561   struct main_type *main_type;
 562 };
 563
 564 #define NULL_TYPE ((struct type *) 0)
 565
 566 /* C++ language-specific information for TYPE_CODE_STRUCT and TYPE_CODE_UNION
 567    nodes.  */
 568
 569 struct cplus_struct_type
 570   {
 571     /* Number of base classes this type derives from.  The baseclasses are
 572        stored in the first N_BASECLASSES fields (i.e. the `fields' field of
 573        the struct type).  I think only the `type' field of such a field has
 574        any meaning.  */
 575
 576     short n_baseclasses;
 577
 578     /* Number of methods with unique names.  All overloaded methods with
 579        the same name count only once. */
 580
 581     short nfn_fields;
 582
 583     /* Number of methods described for this type, not including the
 584        methods that it derives from.  */
 585
 586     short nfn_fields_total;
 587
 588     /* The "declared_type" field contains a code saying how the
 589        user really declared this type, e.g., "class s", "union s",
 590        "struct s".
 591        The 3 above things come out from the C++ compiler looking like classes,
 592        but we keep track of the real declaration so we can give
 593        the correct information on "ptype". (Note: TEMPLATE may not
 594        belong in this list...)  */
 595
 596 #define DECLARED_TYPE_CLASS 0
 597 #define DECLARED_TYPE_UNION 1
 598 #define DECLARED_TYPE_STRUCT 2
 599 #define DECLARED_TYPE_TEMPLATE 3
 600     short declared_type;        /* One of the above codes */
 601
 602     /* For derived classes, the number of base classes is given by n_baseclasses
 603        and virtual_field_bits is a bit vector containing one bit per base class.
 604        If the base class is virtual, the corresponding bit will be set.
 605        I.E, given:
 606
 607        class A{};
 608        class B{};
 609        class C : public B, public virtual A {};
 610
 611        B is a baseclass of C; A is a virtual baseclass for C.
 612        This is a C++ 2.0 language feature. */
 613
 614     B_TYPE *virtual_field_bits;
 615
 616     /* For classes with private fields, the number of fields is given by
 617        nfields and private_field_bits is a bit vector containing one bit
 618        per field.
 619        If the field is private, the corresponding bit will be set. */
 620
 621     B_TYPE *private_field_bits;
 622
 623     /* For classes with protected fields, the number of fields is given by
 624        nfields and protected_field_bits is a bit vector containing one bit
 625        per field.
 626        If the field is private, the corresponding bit will be set. */
 627
 628     B_TYPE *protected_field_bits;
 629
 630     /* for classes with fields to be ignored, either this is optimized out
 631        or this field has length 0 */
 632
 633     B_TYPE *ignore_field_bits;
 634
 635     /* For classes, structures, and unions, a description of each field,
 636        which consists of an overloaded name, followed by the types of
 637        arguments that the method expects, and then the name after it
 638        has been renamed to make it distinct.
 639
 640        fn_fieldlists points to an array of nfn_fields of these. */
 641
 642     struct fn_fieldlist
 643       {
 644
 645         /* The overloaded name.  */
 646
 647         char *name;
 648
 649         /* The number of methods with this name.  */
 650
 651         int length;
 652
 653         /* The list of methods.  */
 654
 655         struct fn_field
 656           {
 657
 658             /* If is_stub is clear, this is the mangled name which we can
 659                look up to find the address of the method (FIXME: it would
 660                be cleaner to have a pointer to the struct symbol here
 661                instead).  */
 662
 663             /* If is_stub is set, this is the portion of the mangled
 664                name which specifies the arguments.  For example, "ii",
 665                if there are two int arguments, or "" if there are no
 666                arguments.  See gdb_mangle_name for the conversion from this
 667                format to the one used if is_stub is clear.  */
 668
 669             char *physname;
 670
 671             /* The function type for the method.
 672                (This comment used to say "The return value of the method",
 673                but that's wrong. The function type
 674                is expected here, i.e. something with TYPE_CODE_FUNC,
 675                and *not* the return-value type). */
 676
 677             struct type *type;
 678
 679             /* For virtual functions.
 680                First baseclass that defines this virtual function.   */
 681
 682             struct type *fcontext;
 683
 684             /* Attributes. */
 685
 686             unsigned int is_const:1;
 687             unsigned int is_volatile:1;
 688             unsigned int is_private:1;
 689             unsigned int is_protected:1;
 690             unsigned int is_public:1;
 691             unsigned int is_abstract:1;
 692             unsigned int is_static:1;
 693             unsigned int is_final:1;
 694             unsigned int is_synchronized:1;
 695             unsigned int is_native:1;
 696             unsigned int is_artificial:1;
 697
 698             /* A stub method only has some fields valid (but they are enough
 699                to reconstruct the rest of the fields).  */
 700             unsigned int is_stub:1;
 701
 702             /* C++ method that is inlined */
 703             unsigned int is_inlined:1;
 704
 705             /* Unused.  */
 706             unsigned int dummy:3;
 707
 708             /* Index into that baseclass's virtual function table,
 709                minus 2; else if static: VOFFSET_STATIC; else: 0.  */
 710
 711             unsigned int voffset:16;
 712
 713 #define VOFFSET_STATIC 1
 714
 715           }
 716          *fn_fields;
 717
 718       }
 719      *fn_fieldlists;
 720
 721     /* If this "struct type" describes a template, then it
 722      * has arguments. "template_args" points to an array of
 723      * template arg descriptors, of length "ntemplate_args".
 724      * The only real information in each of these template arg descriptors
 725      * is a name. "type" will typically just point to a "struct type" with
 726      * the placeholder TYPE_CODE_TEMPLATE_ARG type.
 727      */
 728     short ntemplate_args;
 729     struct template_arg
 730       {
 731         char *name;
 732         struct type *type;
 733       }
 734      *template_args;
 735
 736     /* If this "struct type" describes a template, it has a list
 737      * of instantiations. "instantiations" is a pointer to an array
 738      * of type's, one representing each instantiation. There
 739      * are "ninstantiations" elements in this array.
 740      */
 741     short ninstantiations;
 742     struct type **instantiations;
 743
 744     /* The following points to information relevant to the runtime model
 745      * of the compiler.
 746      * Currently being used only for HP's ANSI C++ compiler.
 747      * (This type may have to be changed/enhanced for other compilers.)
 748      *
 749      * RUNTIME_PTR is NULL if there is no runtime information (currently
 750      * this means the type was not compiled by HP aCC).
 751      *
 752      * Fields in structure pointed to:
 753      * ->HAS_VTABLE : 0 => no virtual table, 1 => vtable present
 754      *
 755      * ->PRIMARY_BASE points to the first non-virtual base class that has
 756      * a virtual table.
 757      *
 758      * ->VIRTUAL_BASE_LIST points to a list of struct type * pointers that
 759      * point to the type information for all virtual bases among this type's
 760      * ancestors.
 761      */
 762     struct runtime_info
 763       {
 764         short has_vtable;
 765         struct type *primary_base;
 766         struct type **virtual_base_list;
 767       }
 768      *runtime_ptr;
 769
 770     /* Pointer to information about enclosing scope, if this is a
 771      * local type.  If it is not a local type, this is NULL
 772      */
 773     struct local_type_info
 774       {
 775         char *file;
 776         int line;
 777       }
 778      *localtype_ptr;
 779   };
 780
 781 /* Struct used in computing virtual base list */
 782 struct vbase
 783   {
 784     struct type *vbasetype;     /* pointer to virtual base */
 785     struct vbase *next;         /* next in chain */
 786   };
 787
 788 /* Struct used for ranking a function for overload resolution */
 789 struct badness_vector
 790   {
 791     int length;
 792     int *rank;
 793   };
 794
 795 /* The default value of TYPE_CPLUS_SPECIFIC(T) points to the
 796    this shared static structure. */
 797
 798 extern const struct cplus_struct_type cplus_struct_default;
 799
 800 extern void allocate_cplus_struct_type (struct type *);
 801
 802 #define INIT_CPLUS_SPECIFIC(type) \
 803   (TYPE_CPLUS_SPECIFIC(type)=(struct cplus_struct_type*)&cplus_struct_default)
 804 #define ALLOCATE_CPLUS_STRUCT_TYPE(type) allocate_cplus_struct_type (type)
 805 #define HAVE_CPLUS_STRUCT(type) \
 806   (TYPE_CPLUS_SPECIFIC(type) != &cplus_struct_default)
 807
 808 #define TYPE_INSTANCE_FLAGS(thistype) (thistype)->instance_flags
 809 #define TYPE_MAIN_TYPE(thistype) (thistype)->main_type
 810 #define TYPE_NAME(thistype) TYPE_MAIN_TYPE(thistype)->name
 811 #define TYPE_TAG_NAME(type) TYPE_MAIN_TYPE(type)->tag_name
 812 #define TYPE_TARGET_TYPE(thistype) TYPE_MAIN_TYPE(thistype)->target_type
 813 #define TYPE_POINTER_TYPE(thistype) (thistype)->pointer_type
 814 #define TYPE_REFERENCE_TYPE(thistype) (thistype)->reference_type
 815 #define TYPE_CHAIN(thistype) (thistype)->chain
 816 /* Note that if thistype is a TYPEDEF type, you have to call check_typedef.
 817    But check_typedef does set the TYPE_LENGTH of the TYPEDEF type,
 818    so you only have to call check_typedef once.  Since allocate_value
 819    calls check_typedef, TYPE_LENGTH (VALUE_TYPE (X)) is safe.  */
 820 #define TYPE_LENGTH(thistype) (thistype)->length
 821 #define TYPE_OBJFILE(thistype) TYPE_MAIN_TYPE(thistype)->objfile
 822 #define TYPE_FLAGS(thistype) TYPE_MAIN_TYPE(thistype)->flags
 823 /* Note that TYPE_CODE can be TYPE_CODE_TYPEDEF, so if you want the real
 824    type, you need to do TYPE_CODE (check_type (this_type)). */
 825 #define TYPE_CODE(thistype) TYPE_MAIN_TYPE(thistype)->code
 826 #define TYPE_NFIELDS(thistype) TYPE_MAIN_TYPE(thistype)->nfields
 827 #define TYPE_FIELDS(thistype) TYPE_MAIN_TYPE(thistype)->fields
 828 #define TYPE_TEMPLATE_ARGS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->template_args
 829 #define TYPE_INSTANTIATIONS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->instantiations
 830
 831 #define TYPE_INDEX_TYPE(type) TYPE_FIELD_TYPE (type, 0)
 832 #define TYPE_LOW_BOUND(range_type) TYPE_FIELD_BITPOS (range_type, 0)
 833 #define TYPE_HIGH_BOUND(range_type) TYPE_FIELD_BITPOS (range_type, 1)
 834
 835 /* Moto-specific stuff for FORTRAN arrays */
 836
 837 #define TYPE_ARRAY_UPPER_BOUND_TYPE(thistype) \
 838         TYPE_MAIN_TYPE(thistype)->upper_bound_type
 839 #define TYPE_ARRAY_LOWER_BOUND_TYPE(thistype) \
 840         TYPE_MAIN_TYPE(thistype)->lower_bound_type
 841
 842 #define TYPE_ARRAY_UPPER_BOUND_VALUE(arraytype) \
 843    (TYPE_FIELD_BITPOS((TYPE_FIELD_TYPE((arraytype),0)),1))
 844
 845 #define TYPE_ARRAY_LOWER_BOUND_VALUE(arraytype) \
 846    (TYPE_FIELD_BITPOS((TYPE_FIELD_TYPE((arraytype),0)),0))
 847
 848 /* C++ */
 849
 850 #define TYPE_VPTR_BASETYPE(thistype) TYPE_MAIN_TYPE(thistype)->vptr_basetype
 851 #define TYPE_DOMAIN_TYPE(thistype) TYPE_MAIN_TYPE(thistype)->vptr_basetype
 852 #define TYPE_VPTR_FIELDNO(thistype) TYPE_MAIN_TYPE(thistype)->vptr_fieldno
 853 #define TYPE_FN_FIELDS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->fn_fields
 854 #define TYPE_NFN_FIELDS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->nfn_fields
 855 #define TYPE_NFN_FIELDS_TOTAL(thistype) TYPE_CPLUS_SPECIFIC(thistype)->nfn_fields_total
 856 #define TYPE_NTEMPLATE_ARGS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->ntemplate_args
 857 #define TYPE_NINSTANTIATIONS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->ninstantiations
 858 #define TYPE_DECLARED_TYPE(thistype) TYPE_CPLUS_SPECIFIC(thistype)->declared_type
 859 #define TYPE_TYPE_SPECIFIC(thistype) TYPE_MAIN_TYPE(thistype)->type_specific
 860 #define TYPE_CPLUS_SPECIFIC(thistype) TYPE_MAIN_TYPE(thistype)->type_specific.cplus_stuff
 861 #define TYPE_FLOATFORMAT(thistype) TYPE_MAIN_TYPE(thistype)->type_specific.floatformat
 862 #define TYPE_BASECLASS(thistype,index) TYPE_MAIN_TYPE(thistype)->fields[index].type
 863 #define TYPE_N_BASECLASSES(thistype) TYPE_CPLUS_SPECIFIC(thistype)->n_baseclasses
 864 #define TYPE_BASECLASS_NAME(thistype,index) TYPE_MAIN_TYPE(thistype)->fields[index].name
 865 #define TYPE_BASECLASS_BITPOS(thistype,index) TYPE_FIELD_BITPOS(thistype,index)
 866 #define BASETYPE_VIA_PUBLIC(thistype, index) \
 867   ((!TYPE_FIELD_PRIVATE(thistype, index)) && (!TYPE_FIELD_PROTECTED(thistype, index)))
 868
 869 #define BASETYPE_VIA_VIRTUAL(thistype, index) \
 870   (TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits == NULL ? 0 \
 871     : B_TST(TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits, (index)))
 872
 873 #define FIELD_TYPE(thisfld) ((thisfld).type)
 874 #define FIELD_NAME(thisfld) ((thisfld).name)
 875 #define FIELD_BITPOS(thisfld) ((thisfld).loc.bitpos)
 876 #define FIELD_ARTIFICIAL(thisfld) ((thisfld).artificial)
 877 #define FIELD_BITSIZE(thisfld) ((thisfld).bitsize)
 878 #define FIELD_STATIC_KIND(thisfld) ((thisfld).static_kind)
 879 #define FIELD_PHYSNAME(thisfld) ((thisfld).loc.physname)
 880 #define FIELD_PHYSADDR(thisfld) ((thisfld).loc.physaddr)
 881 #define SET_FIELD_PHYSNAME(thisfld, name) \
 882   ((thisfld).static_kind = 1, FIELD_PHYSNAME(thisfld) = (name))
 883 #define SET_FIELD_PHYSADDR(thisfld, name) \
 884   ((thisfld).static_kind = 2, FIELD_PHYSADDR(thisfld) = (name))
 885 #define TYPE_FIELD(thistype, n) TYPE_MAIN_TYPE(thistype)->fields[n]
 886 #define TYPE_FIELD_TYPE(thistype, n) FIELD_TYPE(TYPE_FIELD(thistype, n))
 887 #define TYPE_FIELD_NAME(thistype, n) FIELD_NAME(TYPE_FIELD(thistype, n))
 888 #define TYPE_FIELD_BITPOS(thistype, n) FIELD_BITPOS(TYPE_FIELD(thistype,n))
 889 #define TYPE_FIELD_ARTIFICIAL(thistype, n) FIELD_ARTIFICIAL(TYPE_FIELD(thistype,n))
 890 #define TYPE_FIELD_BITSIZE(thistype, n) FIELD_BITSIZE(TYPE_FIELD(thistype,n))
 891 #define TYPE_FIELD_PACKED(thistype, n) (FIELD_BITSIZE(TYPE_FIELD(thistype,n))!=0)
 892 #define TYPE_TEMPLATE_ARG(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->template_args[n]
 893 #define TYPE_INSTANTIATION(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->instantiations[n]
 894
 895 #define TYPE_FIELD_PRIVATE_BITS(thistype) \
 896   TYPE_CPLUS_SPECIFIC(thistype)->private_field_bits
 897 #define TYPE_FIELD_PROTECTED_BITS(thistype) \
 898   TYPE_CPLUS_SPECIFIC(thistype)->protected_field_bits
 899 #define TYPE_FIELD_IGNORE_BITS(thistype) \
 900   TYPE_CPLUS_SPECIFIC(thistype)->ignore_field_bits
 901 #define TYPE_FIELD_VIRTUAL_BITS(thistype) \
 902   TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits
 903 #define SET_TYPE_FIELD_PRIVATE(thistype, n) \
 904   B_SET (TYPE_CPLUS_SPECIFIC(thistype)->private_field_bits, (n))
 905 #define SET_TYPE_FIELD_PROTECTED(thistype, n) \
 906   B_SET (TYPE_CPLUS_SPECIFIC(thistype)->protected_field_bits, (n))
 907 #define SET_TYPE_FIELD_IGNORE(thistype, n) \
 908   B_SET (TYPE_CPLUS_SPECIFIC(thistype)->ignore_field_bits, (n))
 909 #define SET_TYPE_FIELD_VIRTUAL(thistype, n) \
 910   B_SET (TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits, (n))
 911 #define TYPE_FIELD_PRIVATE(thistype, n) \
 912   (TYPE_CPLUS_SPECIFIC(thistype)->private_field_bits == NULL ? 0 \
 913     : B_TST(TYPE_CPLUS_SPECIFIC(thistype)->private_field_bits, (n)))
 914 #define TYPE_FIELD_PROTECTED(thistype, n) \
 915   (TYPE_CPLUS_SPECIFIC(thistype)->protected_field_bits == NULL ? 0 \
 916     : B_TST(TYPE_CPLUS_SPECIFIC(thistype)->protected_field_bits, (n)))
 917 #define TYPE_FIELD_IGNORE(thistype, n) \
 918   (TYPE_CPLUS_SPECIFIC(thistype)->ignore_field_bits == NULL ? 0 \
 919     : B_TST(TYPE_CPLUS_SPECIFIC(thistype)->ignore_field_bits, (n)))
 920 #define TYPE_FIELD_VIRTUAL(thistype, n) \
 921   (TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits == NULL ? 0 \
 922     : B_TST(TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits, (n)))
 923
 924 #define TYPE_FIELD_STATIC(thistype, n) (TYPE_MAIN_TYPE (thistype)->fields[n].static_kind != 0)
 925 #define TYPE_FIELD_STATIC_KIND(thistype, n) TYPE_MAIN_TYPE (thistype)->fields[n].static_kind
 926 #define TYPE_FIELD_STATIC_HAS_ADDR(thistype, n) (TYPE_MAIN_TYPE (thistype)->fields[n].static_kind == 2)
 927 #define TYPE_FIELD_STATIC_PHYSNAME(thistype, n) FIELD_PHYSNAME(TYPE_FIELD(thistype, n))
 928 #define TYPE_FIELD_STATIC_PHYSADDR(thistype, n) FIELD_PHYSADDR(TYPE_FIELD(thistype, n))
 929
 930 #define TYPE_FN_FIELDLISTS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists
 931 #define TYPE_FN_FIELDLIST(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists[n]
 932 #define TYPE_FN_FIELDLIST1(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists[n].fn_fields
 933 #define TYPE_FN_FIELDLIST_NAME(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists[n].name
 934 #define TYPE_FN_FIELDLIST_LENGTH(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists[n].length
 935
 936 #define TYPE_FN_FIELD(thisfn, n) (thisfn)[n]
 937 #define TYPE_FN_FIELD_PHYSNAME(thisfn, n) (thisfn)[n].physname
 938 #define TYPE_FN_FIELD_TYPE(thisfn, n) (thisfn)[n].type
 939 #define TYPE_FN_FIELD_ARGS(thisfn, n) TYPE_FIELDS ((thisfn)[n].type)
 940 #define TYPE_FN_FIELD_CONST(thisfn, n) ((thisfn)[n].is_const)
 941 #define TYPE_FN_FIELD_VOLATILE(thisfn, n) ((thisfn)[n].is_volatile)
 942 #define TYPE_FN_FIELD_PRIVATE(thisfn, n) ((thisfn)[n].is_private)
 943 #define TYPE_FN_FIELD_PROTECTED(thisfn, n) ((thisfn)[n].is_protected)
 944 #define TYPE_FN_FIELD_PUBLIC(thisfn, n) ((thisfn)[n].is_public)
 945 #define TYPE_FN_FIELD_STATIC(thisfn, n) ((thisfn)[n].is_static)
 946 #define TYPE_FN_FIELD_FINAL(thisfn, n) ((thisfn)[n].is_final)
 947 #define TYPE_FN_FIELD_SYNCHRONIZED(thisfn, n) ((thisfn)[n].is_synchronized)
 948 #define TYPE_FN_FIELD_NATIVE(thisfn, n) ((thisfn)[n].is_native)
 949 #define TYPE_FN_FIELD_ARTIFICIAL(thisfn, n) ((thisfn)[n].is_artificial)
 950 #define TYPE_FN_FIELD_ABSTRACT(thisfn, n) ((thisfn)[n].is_abstract)
 951 #define TYPE_FN_FIELD_STUB(thisfn, n) ((thisfn)[n].is_stub)
 952 #define TYPE_FN_FIELD_INLINED(thisfn, n) ((thisfn)[n].is_inlined)
 953 #define TYPE_FN_FIELD_FCONTEXT(thisfn, n) ((thisfn)[n].fcontext)
 954 #define TYPE_FN_FIELD_VOFFSET(thisfn, n) ((thisfn)[n].voffset-2)
 955 #define TYPE_FN_FIELD_VIRTUAL_P(thisfn, n) ((thisfn)[n].voffset > 1)
 956 #define TYPE_FN_FIELD_STATIC_P(thisfn, n) ((thisfn)[n].voffset == VOFFSET_STATIC)
 957
 958 #define TYPE_RUNTIME_PTR(thistype) (TYPE_CPLUS_SPECIFIC(thistype)->runtime_ptr)
 959 #define TYPE_VTABLE(thistype) (TYPE_RUNTIME_PTR(thistype)->has_vtable)
 960 #define TYPE_HAS_VTABLE(thistype) (TYPE_RUNTIME_PTR(thistype) && TYPE_VTABLE(thistype))
 961 #define TYPE_PRIMARY_BASE(thistype) (TYPE_RUNTIME_PTR(thistype)->primary_base)
 962 #define TYPE_VIRTUAL_BASE_LIST(thistype) (TYPE_RUNTIME_PTR(thistype)->virtual_base_list)
 963
 964 #define TYPE_LOCALTYPE_PTR(thistype) (TYPE_CPLUS_SPECIFIC(thistype)->localtype_ptr)
 965 #define TYPE_LOCALTYPE_FILE(thistype) (TYPE_CPLUS_SPECIFIC(thistype)->localtype_ptr->file)
 966 #define TYPE_LOCALTYPE_LINE(thistype) (TYPE_CPLUS_SPECIFIC(thistype)->localtype_ptr->line)
 967
 968 #define TYPE_IS_OPAQUE(thistype) (((TYPE_CODE (thistype) == TYPE_CODE_STRUCT) ||        \
 969                                    (TYPE_CODE (thistype) == TYPE_CODE_UNION))        && \
 970                                   (TYPE_NFIELDS (thistype) == 0)                     && \
 971                                   (TYPE_CPLUS_SPECIFIC (thistype) && (TYPE_NFN_FIELDS (thistype) == 0)))
 972
 973 struct builtin_type
 974 {
 975   /* Address/pointer types.  */
 976
 977   /* `pointer to data' type.  Some target platforms use an implicitly
 978      {sign,zero} -extended 32-bit ABI pointer on a 64-bit ISA.  */
 979   struct type *builtin_data_ptr;
 980
 981   /* `pointer to function (returning void)' type.  Harvard
 982      architectures mean that ABI function and code pointers are not
 983      interconvertible.  Similarly, since ANSI, C standards have
 984      explicitly said that pointers to functions and pointers to data
 985      are not interconvertible --- that is, you can't cast a function
 986      pointer to void * and back, and expect to get the same value.
 987      However, all function pointer types are interconvertible, so void
 988      (*) () can server as a generic function pointer.  */
 989   struct type *builtin_func_ptr;
 990
 991   /* The target CPU's address type.  This is the ISA address size.  */
 992   struct type *builtin_core_addr;
 993
 994   /* Integral types.  */
 995
 996   /* We use this for the '/c' print format, because c_char is just a
 997      one-byte integral type, which languages less laid back than C
 998      will print as ... well, a one-byte integral type.  */
 999   struct type *builtin_true_char;
1000
1001   /* Implicit size/sign (based on the the architecture's ABI).  */
1002   struct type *builtin_void;
1003   struct type *builtin_char;
1004   struct type *builtin_short;
1005   struct type *builtin_int;
1006   struct type *builtin_long;
1007   struct type *builtin_signed_char;
1008   struct type *builtin_unsigned_char;
1009   struct type *builtin_unsigned_short;
1010   struct type *builtin_unsigned_int;
1011   struct type *builtin_unsigned_long;
1012   struct type *builtin_float;
1013   struct type *builtin_double;
1014   struct type *builtin_long_double;
1015   struct type *builtin_complex;
1016   struct type *builtin_double_complex;
1017   struct type *builtin_string;
1018   struct type *builtin_bool;
1019   struct type *builtin_long_long;
1020   struct type *builtin_unsigned_long_long;
1021 };
1022
1023 /* Return the type table for the specified architecture.  */
1024 extern const struct builtin_type *builtin_type (struct gdbarch *gdbarch);
1025
1026 /* Implicit sizes */
1027 extern struct type *builtin_type_void;
1028 extern struct type *builtin_type_char;
1029 extern struct type *builtin_type_short;
1030 extern struct type *builtin_type_int;
1031 extern struct type *builtin_type_long;
1032 extern struct type *builtin_type_signed_char;
1033 extern struct type *builtin_type_unsigned_char;
1034 extern struct type *builtin_type_unsigned_short;
1035 extern struct type *builtin_type_unsigned_int;
1036 extern struct type *builtin_type_unsigned_long;
1037 extern struct type *builtin_type_float;
1038 extern struct type *builtin_type_double;
1039 extern struct type *builtin_type_long_double;
1040 extern struct type *builtin_type_complex;
1041 extern struct type *builtin_type_double_complex;
1042 extern struct type *builtin_type_string;
1043 extern struct type *builtin_type_bool;
1044
1045 /* Address/pointer types: */
1046 /* (C) Language `pointer to data' type.  Some target platforms use an
1047    implicitly {sign,zero} -extended 32 bit C language pointer on a 64
1048    bit ISA.  */
1049 extern struct type *builtin_type_void_data_ptr;
1050
1051 /* (C) Language `pointer to function returning void' type.  Since
1052    ANSI, C standards have explicitly said that pointers to functions
1053    and pointers to data are not interconvertible --- that is, you
1054    can't cast a function pointer to void * and back, and expect to get
1055    the same value.  However, all function pointer types are
1056    interconvertible, so void (*) () can server as a generic function
1057    pointer.  */
1058 extern struct type *builtin_type_void_func_ptr;
1059
1060 /* The target CPU's address type.  This is the ISA address size. */
1061 extern struct type *builtin_type_CORE_ADDR;
1062 /* The symbol table address type.  Some object file formats have a 32
1063    bit address type even though the TARGET has a 64 bit pointer type
1064    (cf MIPS). */
1065 extern struct type *builtin_type_bfd_vma;
1066
1067 /* Explicit sizes - see C9X <intypes.h> for naming scheme.  The "int0"
1068    is for when an architecture needs to describe a register that has
1069    no size.  */
1070 extern struct type *builtin_type_int0;
1071 extern struct type *builtin_type_int8;
1072 extern struct type *builtin_type_uint8;
1073 extern struct type *builtin_type_int16;
1074 extern struct type *builtin_type_uint16;
1075 extern struct type *builtin_type_int32;
1076 extern struct type *builtin_type_uint32;
1077 extern struct type *builtin_type_int64;
1078 extern struct type *builtin_type_uint64;
1079 extern struct type *builtin_type_int128;
1080 extern struct type *builtin_type_uint128;
1081
1082 /* SIMD types.  We inherit these names from GCC.  */
1083 extern struct type *builtin_type_v4sf;
1084 extern struct type *builtin_type_v4si;
1085 extern struct type *builtin_type_v16qi;
1086 extern struct type *builtin_type_v8qi;
1087 extern struct type *builtin_type_v8hi;
1088 extern struct type *builtin_type_v4hi;
1089 extern struct type *builtin_type_v2si;
1090
1091 /* Types for 64 bit vectors. */
1092 extern struct type *builtin_type_v2_float;
1093 extern struct type *builtin_type_v2_int32;
1094 extern struct type *builtin_type_v4_int16;
1095 extern struct type *builtin_type_v8_int8;
1096 extern struct type *builtin_type_vec64;
1097
1098 /* Types for 128 bit vectors. */
1099 extern struct type *builtin_type_v2_double;
1100 extern struct type *builtin_type_v4_float;
1101 extern struct type *builtin_type_v2_int64;
1102 extern struct type *builtin_type_v4_int32;
1103 extern struct type *builtin_type_v8_int16;
1104 extern struct type *builtin_type_v16_int8;
1105 extern struct type *builtin_type_vec128;
1106
1107 /* Explicit floating-point formats.  See "floatformat.h".  */
1108 extern struct type *builtin_type_ieee_single[BFD_ENDIAN_UNKNOWN];
1109 extern struct type *builtin_type_ieee_single_big;
1110 extern struct type *builtin_type_ieee_single_little;
1111 extern struct type *builtin_type_ieee_double[BFD_ENDIAN_UNKNOWN];
1112 extern struct type *builtin_type_ieee_double_big;
1113 extern struct type *builtin_type_ieee_double_little;
1114 extern struct type *builtin_type_ieee_double_littlebyte_bigword;
1115 extern struct type *builtin_type_i387_ext;
1116 extern struct type *builtin_type_m68881_ext;
1117 extern struct type *builtin_type_i960_ext;
1118 extern struct type *builtin_type_m88110_ext;
1119 extern struct type *builtin_type_m88110_harris_ext;
1120 extern struct type *builtin_type_arm_ext[BFD_ENDIAN_UNKNOWN];
1121 extern struct type *builtin_type_arm_ext_big;
1122 extern struct type *builtin_type_arm_ext_littlebyte_bigword;
1123 extern struct type *builtin_type_ia64_spill[BFD_ENDIAN_UNKNOWN];
1124 extern struct type *builtin_type_ia64_spill_big;
1125 extern struct type *builtin_type_ia64_spill_little;
1126 extern struct type *builtin_type_ia64_quad[BFD_ENDIAN_UNKNOWN];
1127 extern struct type *builtin_type_ia64_quad_big;
1128 extern struct type *builtin_type_ia64_quad_little;
1129
1130 /* We use this for the '/c' print format, because builtin_type_char is
1131    just a one-byte integral type, which languages less laid back than
1132    C will print as ... well, a one-byte integral type.  */
1133 extern struct type *builtin_type_true_char;
1134
1135 /* This type represents a type that was unrecognized in symbol
1136    read-in.  */
1137
1138 extern struct type *builtin_type_error;
1139
1140 extern struct type *builtin_type_long_long;
1141 extern struct type *builtin_type_unsigned_long_long;
1142
1143 /* Modula-2 types */
1144
1145 extern struct type *builtin_type_m2_char;
1146 extern struct type *builtin_type_m2_int;
1147 extern struct type *builtin_type_m2_card;
1148 extern struct type *builtin_type_m2_real;
1149 extern struct type *builtin_type_m2_bool;
1150
1151 /* Fortran (F77) types */
1152
1153 extern struct type *builtin_type_f_character;
1154 extern struct type *builtin_type_f_integer;
1155 extern struct type *builtin_type_f_integer_s2;
1156 extern struct type *builtin_type_f_logical;
1157 extern struct type *builtin_type_f_logical_s1;
1158 extern struct type *builtin_type_f_logical_s2;
1159 extern struct type *builtin_type_f_real;
1160 extern struct type *builtin_type_f_real_s8;
1161 extern struct type *builtin_type_f_real_s16;
1162 extern struct type *builtin_type_f_complex_s8;
1163 extern struct type *builtin_type_f_complex_s16;
1164 extern struct type *builtin_type_f_complex_s32;
1165 extern struct type *builtin_type_f_void;
1166
1167 /* RTTI for C++ */
1168 /* extern struct type *builtin_type_cxx_typeinfo; */
1169
1170 /* Maximum and minimum values of built-in types */
1171
1172 #define MAX_OF_TYPE(t)  \
1173    (TYPE_UNSIGNED(t) ? UMAX_OF_SIZE(TYPE_LENGTH(t)) \
1174     : MAX_OF_SIZE(TYPE_LENGTH(t)))
1175
1176 #define MIN_OF_TYPE(t)  \
1177    (TYPE_UNSIGNED(t) ? UMIN_OF_SIZE(TYPE_LENGTH(t)) \
1178     : MIN_OF_SIZE(TYPE_LENGTH(t)))
1179
1180 /* Allocate space for storing data associated with a particular type.
1181    We ensure that the space is allocated using the same mechanism that
1182    was used to allocate the space for the type structure itself.  I.E.
1183    if the type is on an objfile's objfile_obstack, then the space for data
1184    associated with that type will also be allocated on the objfile_obstack.
1185    If the type is not associated with any particular objfile (such as
1186    builtin types), then the data space will be allocated with xmalloc,
1187    the same as for the type structure. */
1188
1189 #define TYPE_ALLOC(t,size)  \
1190    (TYPE_OBJFILE (t) != NULL  \
1191     ? obstack_alloc (&TYPE_OBJFILE (t) -> objfile_obstack, size) \
1192     : xmalloc (size))
1193
1194 #define TYPE_ZALLOC(t,size)  \
1195    (TYPE_OBJFILE (t) != NULL  \
1196     ? memset (obstack_alloc (&TYPE_OBJFILE (t)->objfile_obstack, size),  \
1197               0, size)  \
1198     : xzalloc (size))
1199
1200 extern struct type *alloc_type (struct objfile *);
1201
1202 extern struct type *init_type (enum type_code, int, int, char *,
1203                                struct objfile *);
1204
1205 /* Helper functions to construct a struct or record type.  An
1206    initially empty type is created using init_composite_type().
1207    Fields are then added using append_struct_type_field().  A union
1208    type has its size set to the largest field.  A struct type has each
1209    field packed against the previous.  */
1210
1211 extern struct type *init_composite_type (char *name, enum type_code code);
1212 extern void append_composite_type_field (struct type *t, char *name,
1213                                          struct type *field);
1214
1215 /* Helper functions to construct a bit flags type.  An initially empty
1216    type is created using init_flag_type().  Flags are then added using
1217    append_flag_type_flag().  */
1218 extern struct type *init_flags_type (char *name, int length);
1219 extern void append_flags_type_flag (struct type *type, int bitpos, char *name);
1220
1221 extern struct type *lookup_reference_type (struct type *);
1222
1223 extern struct type *make_reference_type (struct type *, struct type **);
1224
1225 extern struct type *make_cv_type (int, int, struct type *, struct type **);
1226
1227 extern void replace_type (struct type *, struct type *);
1228
1229 extern int address_space_name_to_int (char *);
1230
1231 extern const char *address_space_int_to_name (int);
1232
1233 extern struct type *make_type_with_address_space (struct type *type,
1234                                                   int space_identifier);
1235
1236 extern struct type *lookup_memberptr_type (struct type *, struct type *);
1237
1238 extern struct type *lookup_methodptr_type (struct type *);
1239
1240 extern void smash_to_method_type (struct type *type, struct type *domain,
1241                                   struct type *to_type, struct field *args,
1242                                   int nargs, int varargs);
1243
1244 extern void smash_to_memberptr_type (struct type *, struct type *,
1245                                      struct type *);
1246
1247 extern struct type *allocate_stub_method (struct type *);
1248
1249 extern char *type_name_no_tag (const struct type *);
1250
1251 extern struct type *lookup_struct_elt_type (struct type *, char *, int);
1252
1253 extern struct type *make_pointer_type (struct type *, struct type **);
1254
1255 extern struct type *lookup_pointer_type (struct type *);
1256
1257 extern struct type *make_function_type (struct type *, struct type **);
1258
1259 extern struct type *lookup_function_type (struct type *);
1260
1261 extern struct type *create_range_type (struct type *, struct type *, int,
1262                                        int);
1263
1264 extern struct type *create_array_type (struct type *, struct type *,
1265                                        struct type *);
1266
1267 extern struct type *create_string_type (struct type *, struct type *);
1268
1269 extern struct type *create_set_type (struct type *, struct type *);
1270
1271 extern struct type *lookup_unsigned_typename (char *);
1272
1273 extern struct type *lookup_signed_typename (char *);
1274
1275 extern struct type *check_typedef (struct type *);
1276
1277 #define CHECK_TYPEDEF(TYPE) (TYPE) = check_typedef (TYPE)
1278
1279 extern void check_stub_method_group (struct type *, int);
1280
1281 extern char *gdb_mangle_name (struct type *, int, int);
1282
1283 extern struct type *lookup_typename (char *, struct block *, int);
1284
1285 extern struct type *lookup_template_type (char *, struct type *,
1286                                           struct block *);
1287
1288 extern struct type *lookup_fundamental_type (struct objfile *, int);
1289
1290 extern void fill_in_vptr_fieldno (struct type *);
1291
1292 extern int get_destructor_fn_field (struct type *, int *, int *);
1293
1294 extern int get_discrete_bounds (struct type *, LONGEST *, LONGEST *);
1295
1296 extern int is_ancestor (struct type *, struct type *);
1297
1298 extern int has_vtable (struct type *);
1299
1300 extern struct type *primary_base_class (struct type *);
1301
1302 extern struct type **virtual_base_list (struct type *);
1303
1304 extern int virtual_base_list_length (struct type *);
1305 extern int virtual_base_list_length_skip_primaries (struct type *);
1306
1307 extern int virtual_base_index (struct type *, struct type *);
1308 extern int virtual_base_index_skip_primaries (struct type *, struct type *);
1309
1310
1311 extern int class_index_in_primary_list (struct type *);
1312
1313 extern int count_virtual_fns (struct type *);
1314
1315 /* Constants for HP/Taligent ANSI C++ runtime model */
1316
1317 /* Where virtual function entries begin in the
1318  * virtual table, in the non-RRBC vtable format.
1319  * First 4 are the metavtable pointer, top offset,
1320  * typeinfo pointer, and dup base info pointer */
1321 #define HP_ACC_VFUNC_START        4
1322
1323 /* (Negative) Offset where virtual base offset entries begin
1324  * in the virtual table. Skips over metavtable pointer and
1325  * the self-offset entry.
1326  * NOTE: NEGATE THIS BEFORE USING! The virtual base offsets
1327  * appear before the address point of the vtable (the slot
1328  * pointed to by the object's vtable pointer), i.e. at lower
1329  * addresses than the vtable pointer. */
1330 #define HP_ACC_VBASE_START        2
1331
1332 /* (Positive) Offset where the pointer to the typeinfo
1333  * object is present in the virtual table */
1334 #define HP_ACC_TYPEINFO_OFFSET    2
1335
1336 /* (Positive) Offset where the ``top offset'' entry of
1337  * the virtual table is */
1338 #define HP_ACC_TOP_OFFSET_OFFSET  1
1339
1340 /* Overload resolution */
1341
1342 #define LENGTH_MATCH(bv) ((bv)->rank[0])
1343
1344 /* Badness if parameter list length doesn't match arg list length */
1345 #define LENGTH_MISMATCH_BADNESS      100
1346 /* Dummy badness value for nonexistent parameter positions */
1347 #define TOO_FEW_PARAMS_BADNESS       100
1348 /* Badness if no conversion among types */
1349 #define INCOMPATIBLE_TYPE_BADNESS    100
1350
1351 /* Badness of integral promotion */
1352 #define INTEGER_PROMOTION_BADNESS      1
1353 /* Badness of floating promotion */
1354 #define FLOAT_PROMOTION_BADNESS        1
1355 /* Badness of integral conversion */
1356 #define INTEGER_CONVERSION_BADNESS     2
1357 /* Badness of floating conversion */
1358 #define FLOAT_CONVERSION_BADNESS       2
1359 /* Badness of integer<->floating conversions */
1360 #define INT_FLOAT_CONVERSION_BADNESS   2
1361 /* Badness of converting to a boolean */
1362 #define BOOLEAN_CONVERSION_BADNESS     2
1363 /* Badness of pointer conversion */
1364 #define POINTER_CONVERSION_BADNESS     2
1365 /* Badness of conversion of pointer to void pointer */
1366 #define VOID_PTR_CONVERSION_BADNESS    2
1367 /* Badness of converting derived to base class */
1368 #define BASE_CONVERSION_BADNESS        2
1369 /* Badness of converting from non-reference to reference */
1370 #define REFERENCE_CONVERSION_BADNESS   2
1371
1372 /* Non-standard conversions allowed by the debugger */
1373 /* Converting a pointer to an int is usually OK */
1374 #define NS_POINTER_CONVERSION_BADNESS 10
1375
1376
1377 extern int compare_badness (struct badness_vector *, struct badness_vector *);
1378
1379 extern struct badness_vector *rank_function (struct type **, int,
1380                                              struct type **, int);
1381
1382 extern int rank_one_type (struct type *, struct type *);
1383
1384 extern void recursive_dump_type (struct type *, int);
1385
1386 /* printcmd.c */
1387
1388 extern void print_scalar_formatted (const void *, struct type *, int, int,
1389                                     struct ui_file *);
1390
1391 extern int can_dereference (struct type *);
1392
1393 extern int is_integral_type (struct type *);
1394
1395 extern void maintenance_print_type (char *, int);
1396
1397 extern htab_t create_copied_types_hash (struct objfile *objfile);
1398
1399 extern struct type *copy_type_recursive (struct objfile *objfile,
1400                                          struct type *type,
1401                                          htab_t copied_types);
1402
1403 #endif /* GDBTYPES_H */