gdb/gdbtypes.h

   1 /* Internal type definitions for GDB.
   2
   3    Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   4    2001, 2002, 2003, 2004 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., 59 Temple Place - Suite 330,
  23    Boston, MA 02111-1307, USA.  */
  24
  25 #if !defined (GDBTYPES_H)
  26 #define GDBTYPES_H 1
  27
  28 /* Forward declarations for prototypes.  */
  29 struct field;
  30 struct block;
  31
  32 /* Codes for `fundamental types'.  This is a monstrosity based on the
  33    bogus notion that there are certain compiler-independent
  34    `fundamental types'.  None of these is well-defined (how big is
  35    FT_SHORT?  Does it depend on the language?  How does the
  36    language-specific code know which type to correlate to FT_SHORT?)  */
  37
  38 #define FT_VOID                 0
  39 #define FT_BOOLEAN              1
  40 #define FT_CHAR                 2       /* we use this for not-unsigned C/C++ chars */
  41 #define FT_SIGNED_CHAR          3       /* we use this for C++ signed chars */
  42 #define FT_UNSIGNED_CHAR        4       /* we use this for C/C++ unsigned chars */
  43 #define FT_SHORT                5
  44 #define FT_SIGNED_SHORT         6
  45 #define FT_UNSIGNED_SHORT       7
  46 #define FT_INTEGER              8
  47 #define FT_SIGNED_INTEGER       9
  48 #define FT_UNSIGNED_INTEGER     10
  49 #define FT_LONG                 11
  50 #define FT_SIGNED_LONG          12
  51 #define FT_UNSIGNED_LONG        13
  52 #define FT_LONG_LONG            14
  53 #define FT_SIGNED_LONG_LONG     15
  54 #define FT_UNSIGNED_LONG_LONG   16
  55 #define FT_FLOAT                17
  56 #define FT_DBL_PREC_FLOAT       18
  57 #define FT_EXT_PREC_FLOAT       19
  58 #define FT_COMPLEX              20
  59 #define FT_DBL_PREC_COMPLEX     21
  60 #define FT_EXT_PREC_COMPLEX     22
  61 #define FT_STRING               23
  62 #define FT_FIXED_DECIMAL        24
  63 #define FT_FLOAT_DECIMAL        25
  64 #define FT_BYTE                 26
  65 #define FT_UNSIGNED_BYTE        27
  66 #define FT_TEMPLATE_ARG         28
  67
  68 #define FT_NUM_MEMBERS          29      /* Highest FT_* above, plus one. */
  69
  70 /* Some macros for char-based bitfields.  */
  71
  72 #define B_SET(a,x)      ((a)[(x)>>3] |= (1 << ((x)&7)))
  73 #define B_CLR(a,x)      ((a)[(x)>>3] &= ~(1 << ((x)&7)))
  74 #define B_TST(a,x)      ((a)[(x)>>3] & (1 << ((x)&7)))
  75 #define B_TYPE          unsigned char
  76 #define B_BYTES(x)      ( 1 + ((x)>>3) )
  77 #define B_CLRALL(a,x)   memset ((a), 0, B_BYTES(x))
  78
  79 /* Different kinds of data types are distinguished by the `code' field.  */
  80
  81 enum type_code
  82   {
  83     TYPE_CODE_UNDEF,            /* Not used; catches errors */
  84     TYPE_CODE_PTR,              /* Pointer type */
  85
  86     /* Array type with lower & upper bounds.
  87
  88        Regardless of the language, GDB represents multidimensional
  89        array types the way C does: as arrays of arrays.  So an
  90        instance of a GDB array type T can always be seen as a series
  91        of instances of TYPE_TARGET_TYPE (T) laid out sequentially in
  92        memory.
  93
  94        Row-major languages like C lay out multi-dimensional arrays so
  95        that incrementing the rightmost index in a subscripting
  96        expression results in the smallest change in the address of the
  97        element referred to.  Column-major languages like Fortran lay
  98        them out so that incrementing the leftmost index results in the
  99        smallest change.
 100
 101        This means that, in column-major languages, working our way
 102        from type to target type corresponds to working through indices
 103        from right to left, not left to right.  */
 104     TYPE_CODE_ARRAY,
 105
 106     TYPE_CODE_STRUCT,           /* C struct or Pascal record */
 107     TYPE_CODE_UNION,            /* C union or Pascal variant part */
 108     TYPE_CODE_ENUM,             /* Enumeration type */
 109     TYPE_CODE_FUNC,             /* Function type */
 110     TYPE_CODE_INT,              /* Integer type */
 111
 112     /* Floating type.  This is *NOT* a complex type.  Beware, there are parts
 113        of GDB which bogusly assume that TYPE_CODE_FLT can mean complex.  */
 114     TYPE_CODE_FLT,
 115
 116     /* Void type.  The length field specifies the length (probably always
 117        one) which is used in pointer arithmetic involving pointers to
 118        this type, but actually dereferencing such a pointer is invalid;
 119        a void type has no length and no actual representation in memory
 120        or registers.  A pointer to a void type is a generic pointer.  */
 121     TYPE_CODE_VOID,
 122
 123     TYPE_CODE_SET,              /* Pascal sets */
 124     TYPE_CODE_RANGE,            /* Range (integers within spec'd bounds) */
 125
 126     /* A string type which is like an array of character but prints
 127        differently (at least for (the deleted) CHILL).  It does not
 128        contain a length field as Pascal strings (for many Pascals,
 129        anyway) do; if we want to deal with such strings, we should use
 130        a new type code.  */
 131     TYPE_CODE_STRING,
 132
 133     /* String of bits; like TYPE_CODE_SET but prints differently (at
 134        least for (the deleted) CHILL).  */
 135     TYPE_CODE_BITSTRING,
 136
 137     /* Unknown type.  The length field is valid if we were able to
 138        deduce that much about the type, or 0 if we don't even know that.  */
 139     TYPE_CODE_ERROR,
 140
 141     /* C++ */
 142     TYPE_CODE_MEMBER,           /* Member type */
 143     TYPE_CODE_METHOD,           /* Method type */
 144     TYPE_CODE_REF,              /* C++ Reference types */
 145
 146     TYPE_CODE_CHAR,             /* *real* character type */
 147
 148     /* Boolean type.  0 is false, 1 is true, and other values are non-boolean
 149        (e.g. FORTRAN "logical" used as unsigned int).  */
 150     TYPE_CODE_BOOL,
 151
 152     /* Fortran */
 153     TYPE_CODE_COMPLEX,          /* Complex float */
 154
 155     TYPE_CODE_TYPEDEF,
 156     TYPE_CODE_TEMPLATE,         /* C++ template */
 157     TYPE_CODE_TEMPLATE_ARG,     /* C++ template arg */
 158
 159     TYPE_CODE_NAMESPACE         /* C++ namespace.  */
 160   };
 161
 162 /* For now allow source to use TYPE_CODE_CLASS for C++ classes, as an
 163    alias for TYPE_CODE_STRUCT.  This is for DWARF, which has a distinct
 164    "class" attribute.  Perhaps we should actually have a separate TYPE_CODE
 165    so that we can print "class" or "struct" depending on what the debug
 166    info said.  It's not clear we should bother.  */
 167
 168 #define TYPE_CODE_CLASS TYPE_CODE_STRUCT
 169
 170 /* Some bits for the type's flags word, and macros to test them. */
 171
 172 /* Unsigned integer type.  If this is not set for a TYPE_CODE_INT, the
 173    type is signed (unless TYPE_FLAG_NOSIGN (below) is set). */
 174
 175 #define TYPE_FLAG_UNSIGNED      (1 << 0)
 176 #define TYPE_UNSIGNED(t)        (TYPE_FLAGS (t) & TYPE_FLAG_UNSIGNED)
 177
 178 /* No sign for this type.  In C++, "char", "signed char", and "unsigned
 179    char" are distinct types; so we need an extra flag to indicate the
 180    absence of a sign! */
 181
 182 #define TYPE_FLAG_NOSIGN        (1 << 1)
 183 #define TYPE_NOSIGN(t)          (TYPE_FLAGS (t) & TYPE_FLAG_NOSIGN)
 184
 185 /* This appears in a type's flags word if it is a stub type (e.g., if
 186    someone referenced a type that wasn't defined in a source file
 187    via (struct sir_not_appearing_in_this_film *)).  */
 188
 189 #define TYPE_FLAG_STUB          (1 << 2)
 190 #define TYPE_STUB(t)            (TYPE_FLAGS (t) & TYPE_FLAG_STUB)
 191
 192 /* The target type of this type is a stub type, and this type needs to
 193    be updated if it gets un-stubbed in check_typedef.
 194    Used for arrays and ranges, in which TYPE_LENGTH of the array/range
 195    gets set based on the TYPE_LENGTH of the target type.
 196    Also, set for TYPE_CODE_TYPEDEF. */
 197
 198 #define TYPE_FLAG_TARGET_STUB   (1 << 3)
 199 #define TYPE_TARGET_STUB(t)     (TYPE_FLAGS (t) & TYPE_FLAG_TARGET_STUB)
 200
 201 /* Static type.  If this is set, the corresponding type had
 202  * a static modifier.
 203  * Note: This may be unnecessary, since static data members
 204  * are indicated by other means (bitpos == -1)
 205  */
 206
 207 #define TYPE_FLAG_STATIC        (1 << 4)
 208 #define TYPE_STATIC(t)          (TYPE_FLAGS (t) & TYPE_FLAG_STATIC)
 209
 210 /* Constant type.  If this is set, the corresponding type has a
 211  * const modifier.
 212  */
 213
 214 #define TYPE_FLAG_CONST         (1 << 5)
 215 #define TYPE_CONST(t)           (TYPE_INSTANCE_FLAGS (t) & TYPE_FLAG_CONST)
 216
 217 /* Volatile type.  If this is set, the corresponding type has a
 218  * volatile modifier.
 219  */
 220
 221 #define TYPE_FLAG_VOLATILE      (1 << 6)
 222 #define TYPE_VOLATILE(t)        (TYPE_INSTANCE_FLAGS (t) & TYPE_FLAG_VOLATILE)
 223
 224
 225 /* This is a function type which appears to have a prototype.  We need this
 226    for function calls in order to tell us if it's necessary to coerce the args,
 227    or to just do the standard conversions.  This is used with a short field. */
 228
 229 #define TYPE_FLAG_PROTOTYPED    (1 << 7)
 230 #define TYPE_PROTOTYPED(t)      (TYPE_FLAGS (t) & TYPE_FLAG_PROTOTYPED)
 231
 232 /* This flag is used to indicate that processing for this type
 233    is incomplete.
 234
 235    (Mostly intended for HP platforms, where class methods, for
 236    instance, can be encountered before their classes in the debug
 237    info; the incomplete type has to be marked so that the class and
 238    the method can be assigned correct types.) */
 239
 240 #define TYPE_FLAG_INCOMPLETE    (1 << 8)
 241 #define TYPE_INCOMPLETE(t)      (TYPE_FLAGS (t) & TYPE_FLAG_INCOMPLETE)
 242
 243 /* Instruction-space delimited type.  This is for Harvard architectures
 244    which have separate instruction and data address spaces (and perhaps
 245    others).
 246
 247    GDB usually defines a flat address space that is a superset of the
 248    architecture's two (or more) address spaces, but this is an extension
 249    of the architecture's model.
 250
 251    If TYPE_FLAG_INST is set, an object of the corresponding type
 252    resides in instruction memory, even if its address (in the extended
 253    flat address space) does not reflect this.
 254
 255    Similarly, if TYPE_FLAG_DATA is set, then an object of the
 256    corresponding type resides in the data memory space, even if
 257    this is not indicated by its (flat address space) address.
 258
 259    If neither flag is set, the default space for functions / methods
 260    is instruction space, and for data objects is data memory.  */
 261
 262 #define TYPE_FLAG_CODE_SPACE    (1 << 9)
 263 #define TYPE_CODE_SPACE(t)      (TYPE_INSTANCE_FLAGS (t) & TYPE_FLAG_CODE_SPACE)
 264
 265 #define TYPE_FLAG_DATA_SPACE    (1 << 10)
 266 #define TYPE_DATA_SPACE(t)      (TYPE_INSTANCE_FLAGS (t) & TYPE_FLAG_DATA_SPACE)
 267
 268 /* FIXME drow/2002-06-03:  Only used for methods, but applies as well
 269    to functions.  */
 270
 271 #define TYPE_FLAG_VARARGS       (1 << 11)
 272 #define TYPE_VARARGS(t)         (TYPE_FLAGS (t) & TYPE_FLAG_VARARGS)
 273
 274 /* Identify a vector type.  Gcc is handling this by adding an extra
 275    attribute to the array type.  We slurp that in as a new flag of a
 276    type.  This is used only in dwarf2read.c.  */
 277 #define TYPE_FLAG_VECTOR        (1 << 12)
 278 #define TYPE_VECTOR(t)          (TYPE_FLAGS (t) & TYPE_FLAG_VECTOR)
 279
 280 /* Address class flags.  Some environments provide for pointers whose
 281    size is different from that of a normal pointer or address types
 282    where the bits are interpreted differently than normal addresses.  The
 283    TYPE_FLAG_ADDRESS_CLASS_n flags may be used in target specific
 284    ways to represent these different types of address classes.  */
 285 #define TYPE_FLAG_ADDRESS_CLASS_1 (1 << 13)
 286 #define TYPE_ADDRESS_CLASS_1(t) (TYPE_INSTANCE_FLAGS(t) \
 287                                  & TYPE_FLAG_ADDRESS_CLASS_1)
 288 #define TYPE_FLAG_ADDRESS_CLASS_2 (1 << 14)
 289 #define TYPE_ADDRESS_CLASS_2(t) (TYPE_INSTANCE_FLAGS(t) \
 290                                  & TYPE_FLAG_ADDRESS_CLASS_2)
 291 #define TYPE_FLAG_ADDRESS_CLASS_ALL (TYPE_FLAG_ADDRESS_CLASS_1 \
 292                                      | TYPE_FLAG_ADDRESS_CLASS_2)
 293 #define TYPE_ADDRESS_CLASS_ALL(t) (TYPE_INSTANCE_FLAGS(t) \
 294                                    & TYPE_FLAG_ADDRESS_CLASS_ALL)
 295
 296 /*  Array bound type.  */
 297 enum array_bound_type
 298 {
 299   BOUND_SIMPLE = 0,
 300   BOUND_BY_VALUE_IN_REG,
 301   BOUND_BY_REF_IN_REG,
 302   BOUND_BY_VALUE_ON_STACK,
 303   BOUND_BY_REF_ON_STACK,
 304   BOUND_CANNOT_BE_DETERMINED
 305 };
 306
 307 /* This structure is space-critical.
 308    Its layout has been tweaked to reduce the space used.  */
 309
 310 struct main_type
 311 {
 312   /* Code for kind of type */
 313
 314   ENUM_BITFIELD(type_code) code : 8;
 315
 316   /* Array bounds.  These fields appear at this location because
 317      they pack nicely here.  */
 318
 319   ENUM_BITFIELD(array_bound_type) upper_bound_type : 4;
 320   ENUM_BITFIELD(array_bound_type) lower_bound_type : 4;
 321
 322   /* Name of this type, or NULL if none.
 323
 324      This is used for printing only, except by poorly designed C++ code.
 325      For looking up a name, look for a symbol in the VAR_DOMAIN.  */
 326
 327   char *name;
 328
 329   /* Tag name for this type, or NULL if none.  This means that the
 330      name of the type consists of a keyword followed by the tag name.
 331      Which keyword is determined by the type code ("struct" for
 332      TYPE_CODE_STRUCT, etc.).  As far as I know C/C++ are the only languages
 333      with this feature.
 334
 335      This is used for printing only, except by poorly designed C++ code.
 336      For looking up a name, look for a symbol in the STRUCT_DOMAIN.
 337      One more legitimate use is that if TYPE_FLAG_STUB is set, this is
 338      the name to use to look for definitions in other files.  */
 339
 340   char *tag_name;
 341
 342   /* Every type is now associated with a particular objfile, and the
 343      type is allocated on the objfile_obstack for that objfile.  One problem
 344      however, is that there are times when gdb allocates new types while
 345      it is not in the process of reading symbols from a particular objfile.
 346      Fortunately, these happen when the type being created is a derived
 347      type of an existing type, such as in lookup_pointer_type().  So
 348      we can just allocate the new type using the same objfile as the
 349      existing type, but to do this we need a backpointer to the objfile
 350      from the existing type.  Yes this is somewhat ugly, but without
 351      major overhaul of the internal type system, it can't be avoided
 352      for now. */
 353
 354   struct objfile *objfile;
 355
 356   /* For a pointer type, describes the type of object pointed to.
 357      For an array type, describes the type of the elements.
 358      For a function or method type, describes the type of the return value.
 359      For a range type, describes the type of the full range.
 360      For a complex type, describes the type of each coordinate.
 361      Unused otherwise.  */
 362
 363   struct type *target_type;
 364
 365   /* Flags about this type.  */
 366
 367   int flags;
 368
 369   /* Number of fields described for this type */
 370
 371   short nfields;
 372
 373   /* Field number of the virtual function table pointer in
 374      VPTR_BASETYPE.  If -1, we were unable to find the virtual
 375      function table pointer in initial symbol reading, and
 376      fill_in_vptr_fieldno should be called to find it if possible.
 377
 378      Unused if this type does not have virtual functions.  */
 379
 380   short vptr_fieldno;
 381
 382   /* For structure and union types, a description of each field.
 383      For set and pascal array types, there is one "field",
 384      whose type is the domain type of the set or array.
 385      For range types, there are two "fields",
 386      the minimum and maximum values (both inclusive).
 387      For enum types, each possible value is described by one "field".
 388      For a function or method type, a "field" for each parameter.
 389      For C++ classes, there is one field for each base class (if it is
 390      a derived class) plus one field for each class data member.  Member
 391      functions are recorded elsewhere.
 392
 393      Using a pointer to a separate array of fields
 394      allows all types to have the same size, which is useful
 395      because we can allocate the space for a type before
 396      we know what to put in it.  */
 397
 398   struct field
 399   {
 400     union field_location
 401     {
 402       /* Position of this field, counting in bits from start of
 403          containing structure.
 404          For BITS_BIG_ENDIAN=1 targets, it is the bit offset to the MSB.
 405          For BITS_BIG_ENDIAN=0 targets, it is the bit offset to the LSB.
 406          For a range bound or enum value, this is the value itself. */
 407
 408       int bitpos;
 409
 410       /* For a static field, if TYPE_FIELD_STATIC_HAS_ADDR then physaddr
 411          is the location (in the target) of the static field.
 412          Otherwise, physname is the mangled label of the static field. */
 413
 414       CORE_ADDR physaddr;
 415       char *physname;
 416     }
 417     loc;
 418
 419     /* For a function or member type, this is 1 if the argument is marked
 420        artificial.  Artificial arguments should not be shown to the
 421        user.  */
 422     unsigned int artificial : 1;
 423
 424     /* This flag is zero for non-static fields, 1 for fields whose location
 425        is specified by the label loc.physname, and 2 for fields whose location
 426        is specified by loc.physaddr.  */
 427
 428     unsigned int static_kind : 2;
 429
 430     /* Size of this field, in bits, or zero if not packed.
 431        For an unpacked field, the field's type's length
 432        says how many bytes the field occupies.  */
 433
 434     unsigned int bitsize : 29;
 435
 436     /* In a struct or union type, type of this field.
 437        In a function or member type, type of this argument.
 438        In an array type, the domain-type of the array.  */
 439
 440     struct type *type;
 441
 442     /* Name of field, value or argument.
 443        NULL for range bounds, array domains, and member function
 444        arguments.  */
 445
 446     char *name;
 447
 448   } *fields;
 449
 450   /* For types with virtual functions (TYPE_CODE_STRUCT), VPTR_BASETYPE
 451      is the base class which defined the virtual function table pointer.
 452
 453      For types that are pointer to member types (TYPE_CODE_MEMBER),
 454      VPTR_BASETYPE is the type that this pointer is a member of.
 455
 456      For method types (TYPE_CODE_METHOD), VPTR_BASETYPE is the aggregate
 457      type that contains the method.
 458
 459      Unused otherwise.  */
 460
 461   struct type *vptr_basetype;
 462
 463   /* Slot to point to additional language-specific fields of this type.  */
 464
 465   union type_specific
 466   {
 467     /* CPLUS_STUFF is for TYPE_CODE_STRUCT.  It is initialized to point to
 468        cplus_struct_default, a default static instance of a struct
 469        cplus_struct_type. */
 470
 471     struct cplus_struct_type *cplus_stuff;
 472
 473     /* FLOATFORMAT is for TYPE_CODE_FLT.  It is a pointer to the
 474        floatformat object that describes the floating-point value
 475        that resides within the type.  */
 476
 477     const struct floatformat *floatformat;
 478   } type_specific;
 479 };
 480
 481 /* A ``struct type'' describes a particular instance of a type, with
 482    some particular qualification.  */
 483 struct type
 484 {
 485   /* Type that is a pointer to this type.
 486      NULL if no such pointer-to type is known yet.
 487      The debugger may add the address of such a type
 488      if it has to construct one later.  */
 489
 490   struct type *pointer_type;
 491
 492   /* C++: also need a reference type.  */
 493
 494   struct type *reference_type;
 495
 496   /* Variant chain.  This points to a type that differs from this one only
 497      in qualifiers and length.  Currently, the possible qualifiers are
 498      const, volatile, code-space, data-space, and address class.  The
 499      length may differ only when one of the address class flags are set.
 500      The variants are linked in a circular ring and share MAIN_TYPE.  */
 501   struct type *chain;
 502
 503   /* Flags specific to this instance of the type, indicating where
 504      on the ring we are.  */
 505   int instance_flags;
 506
 507   /* Length of storage for a value of this type.  This is what
 508      sizeof(type) would return; use it for address arithmetic,
 509      memory reads and writes, etc.  This size includes padding.  For
 510      example, an i386 extended-precision floating point value really
 511      only occupies ten bytes, but most ABI's declare its size to be
 512      12 bytes, to preserve alignment.  A `struct type' representing
 513      such a floating-point type would have a `length' value of 12,
 514      even though the last two bytes are unused.
 515
 516      There's a bit of a host/target mess here, if you're concerned
 517      about machines whose bytes aren't eight bits long, or who don't
 518      have byte-addressed memory.  Various places pass this to memcpy
 519      and such, meaning it must be in units of host bytes.  Various
 520      other places expect they can calculate addresses by adding it
 521      and such, meaning it must be in units of target bytes.  For
 522      some DSP targets, in which HOST_CHAR_BIT will (presumably) be 8
 523      and TARGET_CHAR_BIT will be (say) 32, this is a problem.
 524
 525      One fix would be to make this field in bits (requiring that it
 526      always be a multiple of HOST_CHAR_BIT and TARGET_CHAR_BIT) ---
 527      the other choice would be to make it consistently in units of
 528      HOST_CHAR_BIT.  However, this would still fail to address
 529      machines based on a ternary or decimal representation.  */
 530
 531   unsigned length;
 532
 533   /* Core type, shared by a group of qualified types.  */
 534   struct main_type *main_type;
 535 };
 536
 537 #define NULL_TYPE ((struct type *) 0)
 538
 539 /* C++ language-specific information for TYPE_CODE_STRUCT and TYPE_CODE_UNION
 540    nodes.  */
 541
 542 struct cplus_struct_type
 543   {
 544     /* Number of base classes this type derives from.  The baseclasses are
 545        stored in the first N_BASECLASSES fields (i.e. the `fields' field of
 546        the struct type).  I think only the `type' field of such a field has
 547        any meaning.  */
 548
 549     short n_baseclasses;
 550
 551     /* Number of methods with unique names.  All overloaded methods with
 552        the same name count only once. */
 553
 554     short nfn_fields;
 555
 556     /* Number of methods described for this type, not including the
 557        methods that it derives from.  */
 558
 559     short nfn_fields_total;
 560
 561     /* The "declared_type" field contains a code saying how the
 562        user really declared this type, e.g., "class s", "union s",
 563        "struct s".
 564        The 3 above things come out from the C++ compiler looking like classes,
 565        but we keep track of the real declaration so we can give
 566        the correct information on "ptype". (Note: TEMPLATE may not
 567        belong in this list...)  */
 568
 569 #define DECLARED_TYPE_CLASS 0
 570 #define DECLARED_TYPE_UNION 1
 571 #define DECLARED_TYPE_STRUCT 2
 572 #define DECLARED_TYPE_TEMPLATE 3
 573     short declared_type;        /* One of the above codes */
 574
 575     /* For derived classes, the number of base classes is given by n_baseclasses
 576        and virtual_field_bits is a bit vector containing one bit per base class.
 577        If the base class is virtual, the corresponding bit will be set.
 578        I.E, given:
 579
 580        class A{};
 581        class B{};
 582        class C : public B, public virtual A {};
 583
 584        B is a baseclass of C; A is a virtual baseclass for C.
 585        This is a C++ 2.0 language feature. */
 586
 587     B_TYPE *virtual_field_bits;
 588
 589     /* For classes with private fields, the number of fields is given by
 590        nfields and private_field_bits is a bit vector containing one bit
 591        per field.
 592        If the field is private, the corresponding bit will be set. */
 593
 594     B_TYPE *private_field_bits;
 595
 596     /* For classes with protected fields, the number of fields is given by
 597        nfields and protected_field_bits is a bit vector containing one bit
 598        per field.
 599        If the field is private, the corresponding bit will be set. */
 600
 601     B_TYPE *protected_field_bits;
 602
 603     /* for classes with fields to be ignored, either this is optimized out
 604        or this field has length 0 */
 605
 606     B_TYPE *ignore_field_bits;
 607
 608     /* For classes, structures, and unions, a description of each field,
 609        which consists of an overloaded name, followed by the types of
 610        arguments that the method expects, and then the name after it
 611        has been renamed to make it distinct.
 612
 613        fn_fieldlists points to an array of nfn_fields of these. */
 614
 615     struct fn_fieldlist
 616       {
 617
 618         /* The overloaded name.  */
 619
 620         char *name;
 621
 622         /* The number of methods with this name.  */
 623
 624         int length;
 625
 626         /* The list of methods.  */
 627
 628         struct fn_field
 629           {
 630
 631             /* If is_stub is clear, this is the mangled name which we can
 632                look up to find the address of the method (FIXME: it would
 633                be cleaner to have a pointer to the struct symbol here
 634                instead).  */
 635
 636             /* If is_stub is set, this is the portion of the mangled
 637                name which specifies the arguments.  For example, "ii",
 638                if there are two int arguments, or "" if there are no
 639                arguments.  See gdb_mangle_name for the conversion from this
 640                format to the one used if is_stub is clear.  */
 641
 642             char *physname;
 643
 644             /* The function type for the method.
 645                (This comment used to say "The return value of the method",
 646                but that's wrong. The function type
 647                is expected here, i.e. something with TYPE_CODE_FUNC,
 648                and *not* the return-value type). */
 649
 650             struct type *type;
 651
 652             /* For virtual functions.
 653                First baseclass that defines this virtual function.   */
 654
 655             struct type *fcontext;
 656
 657             /* Attributes. */
 658
 659             unsigned int is_const:1;
 660             unsigned int is_volatile:1;
 661             unsigned int is_private:1;
 662             unsigned int is_protected:1;
 663             unsigned int is_public:1;
 664             unsigned int is_abstract:1;
 665             unsigned int is_static:1;
 666             unsigned int is_final:1;
 667             unsigned int is_synchronized:1;
 668             unsigned int is_native:1;
 669             unsigned int is_artificial:1;
 670
 671             /* A stub method only has some fields valid (but they are enough
 672                to reconstruct the rest of the fields).  */
 673             unsigned int is_stub:1;
 674
 675             /* C++ method that is inlined */
 676             unsigned int is_inlined:1;
 677
 678             /* Unused.  */
 679             unsigned int dummy:3;
 680
 681             /* Index into that baseclass's virtual function table,
 682                minus 2; else if static: VOFFSET_STATIC; else: 0.  */
 683
 684             unsigned int voffset:16;
 685
 686 #define VOFFSET_STATIC 1
 687
 688           }
 689          *fn_fields;
 690
 691       }
 692      *fn_fieldlists;
 693
 694     /* If this "struct type" describes a template, then it
 695      * has arguments. "template_args" points to an array of
 696      * template arg descriptors, of length "ntemplate_args".
 697      * The only real information in each of these template arg descriptors
 698      * is a name. "type" will typically just point to a "struct type" with
 699      * the placeholder TYPE_CODE_TEMPLATE_ARG type.
 700      */
 701     short ntemplate_args;
 702     struct template_arg
 703       {
 704         char *name;
 705         struct type *type;
 706       }
 707      *template_args;
 708
 709     /* If this "struct type" describes a template, it has a list
 710      * of instantiations. "instantiations" is a pointer to an array
 711      * of type's, one representing each instantiation. There
 712      * are "ninstantiations" elements in this array.
 713      */
 714     short ninstantiations;
 715     struct type **instantiations;
 716
 717     /* The following points to information relevant to the runtime model
 718      * of the compiler.
 719      * Currently being used only for HP's ANSI C++ compiler.
 720      * (This type may have to be changed/enhanced for other compilers.)
 721      *
 722      * RUNTIME_PTR is NULL if there is no runtime information (currently
 723      * this means the type was not compiled by HP aCC).
 724      *
 725      * Fields in structure pointed to:
 726      * ->HAS_VTABLE : 0 => no virtual table, 1 => vtable present
 727      *
 728      * ->PRIMARY_BASE points to the first non-virtual base class that has
 729      * a virtual table.
 730      *
 731      * ->VIRTUAL_BASE_LIST points to a list of struct type * pointers that
 732      * point to the type information for all virtual bases among this type's
 733      * ancestors.
 734      */
 735     struct runtime_info
 736       {
 737         short has_vtable;
 738         struct type *primary_base;
 739         struct type **virtual_base_list;
 740       }
 741      *runtime_ptr;
 742
 743     /* Pointer to information about enclosing scope, if this is a
 744      * local type.  If it is not a local type, this is NULL
 745      */
 746     struct local_type_info
 747       {
 748         char *file;
 749         int line;
 750       }
 751      *localtype_ptr;
 752   };
 753
 754 /* Struct used in computing virtual base list */
 755 struct vbase
 756   {
 757     struct type *vbasetype;     /* pointer to virtual base */
 758     struct vbase *next;         /* next in chain */
 759   };
 760
 761 /* Struct used for ranking a function for overload resolution */
 762 struct badness_vector
 763   {
 764     int length;
 765     int *rank;
 766   };
 767
 768 /* The default value of TYPE_CPLUS_SPECIFIC(T) points to the
 769    this shared static structure. */
 770
 771 extern const struct cplus_struct_type cplus_struct_default;
 772
 773 extern void allocate_cplus_struct_type (struct type *);
 774
 775 #define INIT_CPLUS_SPECIFIC(type) \
 776   (TYPE_CPLUS_SPECIFIC(type)=(struct cplus_struct_type*)&cplus_struct_default)
 777 #define ALLOCATE_CPLUS_STRUCT_TYPE(type) allocate_cplus_struct_type (type)
 778 #define HAVE_CPLUS_STRUCT(type) \
 779   (TYPE_CPLUS_SPECIFIC(type) != &cplus_struct_default)
 780
 781 #define TYPE_INSTANCE_FLAGS(thistype) (thistype)->instance_flags
 782 #define TYPE_MAIN_TYPE(thistype) (thistype)->main_type
 783 #define TYPE_NAME(thistype) TYPE_MAIN_TYPE(thistype)->name
 784 #define TYPE_TAG_NAME(type) TYPE_MAIN_TYPE(type)->tag_name
 785 #define TYPE_TARGET_TYPE(thistype) TYPE_MAIN_TYPE(thistype)->target_type
 786 #define TYPE_POINTER_TYPE(thistype) (thistype)->pointer_type
 787 #define TYPE_REFERENCE_TYPE(thistype) (thistype)->reference_type
 788 #define TYPE_CHAIN(thistype) (thistype)->chain
 789 /* Note that if thistype is a TYPEDEF type, you have to call check_typedef.
 790    But check_typedef does set the TYPE_LENGTH of the TYPEDEF type,
 791    so you only have to call check_typedef once.  Since allocate_value
 792    calls check_typedef, TYPE_LENGTH (VALUE_TYPE (X)) is safe.  */
 793 #define TYPE_LENGTH(thistype) (thistype)->length
 794 #define TYPE_OBJFILE(thistype) TYPE_MAIN_TYPE(thistype)->objfile
 795 #define TYPE_FLAGS(thistype) TYPE_MAIN_TYPE(thistype)->flags
 796 /* Note that TYPE_CODE can be TYPE_CODE_TYPEDEF, so if you want the real
 797    type, you need to do TYPE_CODE (check_type (this_type)). */
 798 #define TYPE_CODE(thistype) TYPE_MAIN_TYPE(thistype)->code
 799 #define TYPE_NFIELDS(thistype) TYPE_MAIN_TYPE(thistype)->nfields
 800 #define TYPE_FIELDS(thistype) TYPE_MAIN_TYPE(thistype)->fields
 801 #define TYPE_TEMPLATE_ARGS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->template_args
 802 #define TYPE_INSTANTIATIONS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->instantiations
 803
 804 #define TYPE_INDEX_TYPE(type) TYPE_FIELD_TYPE (type, 0)
 805 #define TYPE_LOW_BOUND(range_type) TYPE_FIELD_BITPOS (range_type, 0)
 806 #define TYPE_HIGH_BOUND(range_type) TYPE_FIELD_BITPOS (range_type, 1)
 807
 808 /* Moto-specific stuff for FORTRAN arrays */
 809
 810 #define TYPE_ARRAY_UPPER_BOUND_TYPE(thistype) \
 811         TYPE_MAIN_TYPE(thistype)->upper_bound_type
 812 #define TYPE_ARRAY_LOWER_BOUND_TYPE(thistype) \
 813         TYPE_MAIN_TYPE(thistype)->lower_bound_type
 814
 815 #define TYPE_ARRAY_UPPER_BOUND_VALUE(arraytype) \
 816    (TYPE_FIELD_BITPOS((TYPE_FIELD_TYPE((arraytype),0)),1))
 817
 818 #define TYPE_ARRAY_LOWER_BOUND_VALUE(arraytype) \
 819    (TYPE_FIELD_BITPOS((TYPE_FIELD_TYPE((arraytype),0)),0))
 820
 821 /* C++ */
 822
 823 #define TYPE_VPTR_BASETYPE(thistype) TYPE_MAIN_TYPE(thistype)->vptr_basetype
 824 #define TYPE_DOMAIN_TYPE(thistype) TYPE_MAIN_TYPE(thistype)->vptr_basetype
 825 #define TYPE_VPTR_FIELDNO(thistype) TYPE_MAIN_TYPE(thistype)->vptr_fieldno
 826 #define TYPE_FN_FIELDS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->fn_fields
 827 #define TYPE_NFN_FIELDS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->nfn_fields
 828 #define TYPE_NFN_FIELDS_TOTAL(thistype) TYPE_CPLUS_SPECIFIC(thistype)->nfn_fields_total
 829 #define TYPE_NTEMPLATE_ARGS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->ntemplate_args
 830 #define TYPE_NINSTANTIATIONS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->ninstantiations
 831 #define TYPE_DECLARED_TYPE(thistype) TYPE_CPLUS_SPECIFIC(thistype)->declared_type
 832 #define TYPE_TYPE_SPECIFIC(thistype) TYPE_MAIN_TYPE(thistype)->type_specific
 833 #define TYPE_CPLUS_SPECIFIC(thistype) TYPE_MAIN_TYPE(thistype)->type_specific.cplus_stuff
 834 #define TYPE_FLOATFORMAT(thistype) TYPE_MAIN_TYPE(thistype)->type_specific.floatformat
 835 #define TYPE_BASECLASS(thistype,index) TYPE_MAIN_TYPE(thistype)->fields[index].type
 836 #define TYPE_N_BASECLASSES(thistype) TYPE_CPLUS_SPECIFIC(thistype)->n_baseclasses
 837 #define TYPE_BASECLASS_NAME(thistype,index) TYPE_MAIN_TYPE(thistype)->fields[index].name
 838 #define TYPE_BASECLASS_BITPOS(thistype,index) TYPE_FIELD_BITPOS(thistype,index)
 839 #define BASETYPE_VIA_PUBLIC(thistype, index) \
 840   ((!TYPE_FIELD_PRIVATE(thistype, index)) && (!TYPE_FIELD_PROTECTED(thistype, index)))
 841
 842 #define BASETYPE_VIA_VIRTUAL(thistype, index) \
 843   (TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits == NULL ? 0 \
 844     : B_TST(TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits, (index)))
 845
 846 #define FIELD_TYPE(thisfld) ((thisfld).type)
 847 #define FIELD_NAME(thisfld) ((thisfld).name)
 848 #define FIELD_BITPOS(thisfld) ((thisfld).loc.bitpos)
 849 #define FIELD_ARTIFICIAL(thisfld) ((thisfld).artificial)
 850 #define FIELD_BITSIZE(thisfld) ((thisfld).bitsize)
 851 #define FIELD_STATIC_KIND(thisfld) ((thisfld).static_kind)
 852 #define FIELD_PHYSNAME(thisfld) ((thisfld).loc.physname)
 853 #define FIELD_PHYSADDR(thisfld) ((thisfld).loc.physaddr)
 854 #define SET_FIELD_PHYSNAME(thisfld, name) \
 855   ((thisfld).static_kind = 1, FIELD_PHYSNAME(thisfld) = (name))
 856 #define SET_FIELD_PHYSADDR(thisfld, name) \
 857   ((thisfld).static_kind = 2, FIELD_PHYSADDR(thisfld) = (name))
 858 #define TYPE_FIELD(thistype, n) TYPE_MAIN_TYPE(thistype)->fields[n]
 859 #define TYPE_FIELD_TYPE(thistype, n) FIELD_TYPE(TYPE_FIELD(thistype, n))
 860 #define TYPE_FIELD_NAME(thistype, n) FIELD_NAME(TYPE_FIELD(thistype, n))
 861 #define TYPE_FIELD_BITPOS(thistype, n) FIELD_BITPOS(TYPE_FIELD(thistype,n))
 862 #define TYPE_FIELD_ARTIFICIAL(thistype, n) FIELD_ARTIFICIAL(TYPE_FIELD(thistype,n))
 863 #define TYPE_FIELD_BITSIZE(thistype, n) FIELD_BITSIZE(TYPE_FIELD(thistype,n))
 864 #define TYPE_FIELD_PACKED(thistype, n) (FIELD_BITSIZE(TYPE_FIELD(thistype,n))!=0)
 865 #define TYPE_TEMPLATE_ARG(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->template_args[n]
 866 #define TYPE_INSTANTIATION(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->instantiations[n]
 867
 868 #define TYPE_FIELD_PRIVATE_BITS(thistype) \
 869   TYPE_CPLUS_SPECIFIC(thistype)->private_field_bits
 870 #define TYPE_FIELD_PROTECTED_BITS(thistype) \
 871   TYPE_CPLUS_SPECIFIC(thistype)->protected_field_bits
 872 #define TYPE_FIELD_IGNORE_BITS(thistype) \
 873   TYPE_CPLUS_SPECIFIC(thistype)->ignore_field_bits
 874 #define TYPE_FIELD_VIRTUAL_BITS(thistype) \
 875   TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits
 876 #define SET_TYPE_FIELD_PRIVATE(thistype, n) \
 877   B_SET (TYPE_CPLUS_SPECIFIC(thistype)->private_field_bits, (n))
 878 #define SET_TYPE_FIELD_PROTECTED(thistype, n) \
 879   B_SET (TYPE_CPLUS_SPECIFIC(thistype)->protected_field_bits, (n))
 880 #define SET_TYPE_FIELD_IGNORE(thistype, n) \
 881   B_SET (TYPE_CPLUS_SPECIFIC(thistype)->ignore_field_bits, (n))
 882 #define SET_TYPE_FIELD_VIRTUAL(thistype, n) \
 883   B_SET (TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits, (n))
 884 #define TYPE_FIELD_PRIVATE(thistype, n) \
 885   (TYPE_CPLUS_SPECIFIC(thistype)->private_field_bits == NULL ? 0 \
 886     : B_TST(TYPE_CPLUS_SPECIFIC(thistype)->private_field_bits, (n)))
 887 #define TYPE_FIELD_PROTECTED(thistype, n) \
 888   (TYPE_CPLUS_SPECIFIC(thistype)->protected_field_bits == NULL ? 0 \
 889     : B_TST(TYPE_CPLUS_SPECIFIC(thistype)->protected_field_bits, (n)))
 890 #define TYPE_FIELD_IGNORE(thistype, n) \
 891   (TYPE_CPLUS_SPECIFIC(thistype)->ignore_field_bits == NULL ? 0 \
 892     : B_TST(TYPE_CPLUS_SPECIFIC(thistype)->ignore_field_bits, (n)))
 893 #define TYPE_FIELD_VIRTUAL(thistype, n) \
 894   (TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits == NULL ? 0 \
 895     : B_TST(TYPE_CPLUS_SPECIFIC(thistype)->virtual_field_bits, (n)))
 896
 897 #define TYPE_FIELD_STATIC(thistype, n) (TYPE_MAIN_TYPE (thistype)->fields[n].static_kind != 0)
 898 #define TYPE_FIELD_STATIC_KIND(thistype, n) TYPE_MAIN_TYPE (thistype)->fields[n].static_kind
 899 #define TYPE_FIELD_STATIC_HAS_ADDR(thistype, n) (TYPE_MAIN_TYPE (thistype)->fields[n].static_kind == 2)
 900 #define TYPE_FIELD_STATIC_PHYSNAME(thistype, n) FIELD_PHYSNAME(TYPE_FIELD(thistype, n))
 901 #define TYPE_FIELD_STATIC_PHYSADDR(thistype, n) FIELD_PHYSADDR(TYPE_FIELD(thistype, n))
 902
 903 #define TYPE_FN_FIELDLISTS(thistype) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists
 904 #define TYPE_FN_FIELDLIST(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists[n]
 905 #define TYPE_FN_FIELDLIST1(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists[n].fn_fields
 906 #define TYPE_FN_FIELDLIST_NAME(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists[n].name
 907 #define TYPE_FN_FIELDLIST_LENGTH(thistype, n) TYPE_CPLUS_SPECIFIC(thistype)->fn_fieldlists[n].length
 908
 909 #define TYPE_FN_FIELD(thisfn, n) (thisfn)[n]
 910 #define TYPE_FN_FIELD_PHYSNAME(thisfn, n) (thisfn)[n].physname
 911 #define TYPE_FN_FIELD_TYPE(thisfn, n) (thisfn)[n].type
 912 #define TYPE_FN_FIELD_ARGS(thisfn, n) TYPE_FIELDS ((thisfn)[n].type)
 913 #define TYPE_FN_FIELD_CONST(thisfn, n) ((thisfn)[n].is_const)
 914 #define TYPE_FN_FIELD_VOLATILE(thisfn, n) ((thisfn)[n].is_volatile)
 915 #define TYPE_FN_FIELD_PRIVATE(thisfn, n) ((thisfn)[n].is_private)
 916 #define TYPE_FN_FIELD_PROTECTED(thisfn, n) ((thisfn)[n].is_protected)
 917 #define TYPE_FN_FIELD_PUBLIC(thisfn, n) ((thisfn)[n].is_public)
 918 #define TYPE_FN_FIELD_STATIC(thisfn, n) ((thisfn)[n].is_static)
 919 #define TYPE_FN_FIELD_FINAL(thisfn, n) ((thisfn)[n].is_final)
 920 #define TYPE_FN_FIELD_SYNCHRONIZED(thisfn, n) ((thisfn)[n].is_synchronized)
 921 #define TYPE_FN_FIELD_NATIVE(thisfn, n) ((thisfn)[n].is_native)
 922 #define TYPE_FN_FIELD_ARTIFICIAL(thisfn, n) ((thisfn)[n].is_artificial)
 923 #define TYPE_FN_FIELD_ABSTRACT(thisfn, n) ((thisfn)[n].is_abstract)
 924 #define TYPE_FN_FIELD_STUB(thisfn, n) ((thisfn)[n].is_stub)
 925 #define TYPE_FN_FIELD_INLINED(thisfn, n) ((thisfn)[n].is_inlined)
 926 #define TYPE_FN_FIELD_FCONTEXT(thisfn, n) ((thisfn)[n].fcontext)
 927 #define TYPE_FN_FIELD_VOFFSET(thisfn, n) ((thisfn)[n].voffset-2)
 928 #define TYPE_FN_FIELD_VIRTUAL_P(thisfn, n) ((thisfn)[n].voffset > 1)
 929 #define TYPE_FN_FIELD_STATIC_P(thisfn, n) ((thisfn)[n].voffset == VOFFSET_STATIC)
 930
 931 #define TYPE_RUNTIME_PTR(thistype) (TYPE_CPLUS_SPECIFIC(thistype)->runtime_ptr)
 932 #define TYPE_VTABLE(thistype) (TYPE_RUNTIME_PTR(thistype)->has_vtable)
 933 #define TYPE_HAS_VTABLE(thistype) (TYPE_RUNTIME_PTR(thistype) && TYPE_VTABLE(thistype))
 934 #define TYPE_PRIMARY_BASE(thistype) (TYPE_RUNTIME_PTR(thistype)->primary_base)
 935 #define TYPE_VIRTUAL_BASE_LIST(thistype) (TYPE_RUNTIME_PTR(thistype)->virtual_base_list)
 936
 937 #define TYPE_LOCALTYPE_PTR(thistype) (TYPE_CPLUS_SPECIFIC(thistype)->localtype_ptr)
 938 #define TYPE_LOCALTYPE_FILE(thistype) (TYPE_CPLUS_SPECIFIC(thistype)->localtype_ptr->file)
 939 #define TYPE_LOCALTYPE_LINE(thistype) (TYPE_CPLUS_SPECIFIC(thistype)->localtype_ptr->line)
 940
 941 #define TYPE_IS_OPAQUE(thistype) (((TYPE_CODE (thistype) == TYPE_CODE_STRUCT) ||        \
 942                                    (TYPE_CODE (thistype) == TYPE_CODE_UNION))        && \
 943                                   (TYPE_NFIELDS (thistype) == 0)                     && \
 944                                   (TYPE_CPLUS_SPECIFIC (thistype) && (TYPE_NFN_FIELDS (thistype) == 0)))
 945
 946 struct builtin_type
 947 {
 948   /* Address/pointer types.  */
 949
 950   /* `pointer to data' type.  Some target platforms use an implicitly
 951      {sign,zero} -extended 32-bit ABI pointer on a 64-bit ISA.  */
 952   struct type *builtin_data_ptr;
 953
 954   /* `pointer to function (returning void)' type.  Harvard
 955      architectures mean that ABI function and code pointers are not
 956      interconvertible.  Similarly, since ANSI, C standards have
 957      explicitly said that pointers to functions and pointers to data
 958      are not interconvertible --- that is, you can't cast a function
 959      pointer to void * and back, and expect to get the same value.
 960      However, all function pointer types are interconvertible, so void
 961      (*) () can server as a generic function pointer.  */
 962   struct type *builtin_func_ptr;
 963
 964   /* The target CPU's address type.  This is the ISA address size.  */
 965   struct type *builtin_core_addr;
 966
 967   /* Integral types.  */
 968
 969   /* We use this for the '/c' print format, because c_char is just a
 970      one-byte integral type, which languages less laid back than C
 971      will print as ... well, a one-byte integral type.  */
 972   struct type *builtin_true_char;
 973
 974   /* Implicit size/sign (based on the the architecture's ABI).  */
 975   struct type *builtin_void;
 976   struct type *builtin_char;
 977   struct type *builtin_short;
 978   struct type *builtin_int;
 979   struct type *builtin_long;
 980   struct type *builtin_signed_char;
 981   struct type *builtin_unsigned_char;
 982   struct type *builtin_unsigned_short;
 983   struct type *builtin_unsigned_int;
 984   struct type *builtin_unsigned_long;
 985   struct type *builtin_float;
 986   struct type *builtin_double;
 987   struct type *builtin_long_double;
 988   struct type *builtin_complex;
 989   struct type *builtin_double_complex;
 990   struct type *builtin_string;
 991   struct type *builtin_bool;
 992   struct type *builtin_long_long;
 993   struct type *builtin_unsigned_long_long;
 994 };
 995
 996 /* Return the type table for the specified architecture.  */
 997 extern const struct builtin_type *builtin_type (struct gdbarch *gdbarch);
 998
 999 /* Implicit sizes */
1000 extern struct type *builtin_type_void;
1001 extern struct type *builtin_type_char;
1002 extern struct type *builtin_type_short;
1003 extern struct type *builtin_type_int;
1004 extern struct type *builtin_type_long;
1005 extern struct type *builtin_type_signed_char;
1006 extern struct type *builtin_type_unsigned_char;
1007 extern struct type *builtin_type_unsigned_short;
1008 extern struct type *builtin_type_unsigned_int;
1009 extern struct type *builtin_type_unsigned_long;
1010 extern struct type *builtin_type_float;
1011 extern struct type *builtin_type_double;
1012 extern struct type *builtin_type_long_double;
1013 extern struct type *builtin_type_complex;
1014 extern struct type *builtin_type_double_complex;
1015 extern struct type *builtin_type_string;
1016 extern struct type *builtin_type_bool;
1017
1018 /* Address/pointer types: */
1019 /* (C) Language `pointer to data' type.  Some target platforms use an
1020    implicitly {sign,zero} -extended 32 bit C language pointer on a 64
1021    bit ISA.  */
1022 extern struct type *builtin_type_void_data_ptr;
1023
1024 /* (C) Language `pointer to function returning void' type.  Since
1025    ANSI, C standards have explicitly said that pointers to functions
1026    and pointers to data are not interconvertible --- that is, you
1027    can't cast a function pointer to void * and back, and expect to get
1028    the same value.  However, all function pointer types are
1029    interconvertible, so void (*) () can server as a generic function
1030    pointer.  */
1031 extern struct type *builtin_type_void_func_ptr;
1032
1033 /* The target CPU's address type.  This is the ISA address size. */
1034 extern struct type *builtin_type_CORE_ADDR;
1035 /* The symbol table address type.  Some object file formats have a 32
1036    bit address type even though the TARGET has a 64 bit pointer type
1037    (cf MIPS). */
1038 extern struct type *builtin_type_bfd_vma;
1039
1040 /* Explicit sizes - see C9X <intypes.h> for naming scheme.  The "int0"
1041    is for when an architecture needs to describe a register that has
1042    no size.  */
1043 extern struct type *builtin_type_int0;
1044 extern struct type *builtin_type_int8;
1045 extern struct type *builtin_type_uint8;
1046 extern struct type *builtin_type_int16;
1047 extern struct type *builtin_type_uint16;
1048 extern struct type *builtin_type_int32;
1049 extern struct type *builtin_type_uint32;
1050 extern struct type *builtin_type_int64;
1051 extern struct type *builtin_type_uint64;
1052 extern struct type *builtin_type_int128;
1053 extern struct type *builtin_type_uint128;
1054
1055 /* SIMD types.  We inherit these names from GCC.  */
1056 extern struct type *builtin_type_v4sf;
1057 extern struct type *builtin_type_v4si;
1058 extern struct type *builtin_type_v16qi;
1059 extern struct type *builtin_type_v8qi;
1060 extern struct type *builtin_type_v8hi;
1061 extern struct type *builtin_type_v4hi;
1062 extern struct type *builtin_type_v2si;
1063
1064 /* Type for 64 bit vectors. */
1065 extern struct type *builtin_type_vec64;
1066 extern struct type *builtin_type_vec64i;
1067
1068 /* Type for 128 bit vectors. */
1069 extern struct type *builtin_type_vec128;
1070 extern struct type *builtin_type_vec128i;
1071
1072 /* Explicit floating-point formats.  See "floatformat.h".  */
1073 extern struct type *builtin_type_ieee_single[BFD_ENDIAN_UNKNOWN];
1074 extern struct type *builtin_type_ieee_single_big;
1075 extern struct type *builtin_type_ieee_single_little;
1076 extern struct type *builtin_type_ieee_double[BFD_ENDIAN_UNKNOWN];
1077 extern struct type *builtin_type_ieee_double_big;
1078 extern struct type *builtin_type_ieee_double_little;
1079 extern struct type *builtin_type_ieee_double_littlebyte_bigword;
1080 extern struct type *builtin_type_i387_ext;
1081 extern struct type *builtin_type_m68881_ext;
1082 extern struct type *builtin_type_i960_ext;
1083 extern struct type *builtin_type_m88110_ext;
1084 extern struct type *builtin_type_m88110_harris_ext;
1085 extern struct type *builtin_type_arm_ext[BFD_ENDIAN_UNKNOWN];
1086 extern struct type *builtin_type_arm_ext_big;
1087 extern struct type *builtin_type_arm_ext_littlebyte_bigword;
1088 extern struct type *builtin_type_ia64_spill[BFD_ENDIAN_UNKNOWN];
1089 extern struct type *builtin_type_ia64_spill_big;
1090 extern struct type *builtin_type_ia64_spill_little;
1091 extern struct type *builtin_type_ia64_quad[BFD_ENDIAN_UNKNOWN];
1092 extern struct type *builtin_type_ia64_quad_big;
1093 extern struct type *builtin_type_ia64_quad_little;
1094
1095 /* We use this for the '/c' print format, because builtin_type_char is
1096    just a one-byte integral type, which languages less laid back than
1097    C will print as ... well, a one-byte integral type.  */
1098 extern struct type *builtin_type_true_char;
1099
1100 /* This type represents a type that was unrecognized in symbol
1101    read-in.  */
1102
1103 extern struct type *builtin_type_error;
1104
1105 extern struct type *builtin_type_long_long;
1106 extern struct type *builtin_type_unsigned_long_long;
1107
1108 /* Modula-2 types */
1109
1110 extern struct type *builtin_type_m2_char;
1111 extern struct type *builtin_type_m2_int;
1112 extern struct type *builtin_type_m2_card;
1113 extern struct type *builtin_type_m2_real;
1114 extern struct type *builtin_type_m2_bool;
1115
1116 /* Fortran (F77) types */
1117
1118 extern struct type *builtin_type_f_character;
1119 extern struct type *builtin_type_f_integer;
1120 extern struct type *builtin_type_f_integer_s2;
1121 extern struct type *builtin_type_f_logical;
1122 extern struct type *builtin_type_f_logical_s1;
1123 extern struct type *builtin_type_f_logical_s2;
1124 extern struct type *builtin_type_f_real;
1125 extern struct type *builtin_type_f_real_s8;
1126 extern struct type *builtin_type_f_real_s16;
1127 extern struct type *builtin_type_f_complex_s8;
1128 extern struct type *builtin_type_f_complex_s16;
1129 extern struct type *builtin_type_f_complex_s32;
1130 extern struct type *builtin_type_f_void;
1131
1132 /* RTTI for C++ */
1133 /* extern struct type *builtin_type_cxx_typeinfo; */
1134
1135 /* Maximum and minimum values of built-in types */
1136
1137 #define MAX_OF_TYPE(t)  \
1138    (TYPE_UNSIGNED(t) ? UMAX_OF_SIZE(TYPE_LENGTH(t)) \
1139     : MAX_OF_SIZE(TYPE_LENGTH(t)))
1140
1141 #define MIN_OF_TYPE(t)  \
1142    (TYPE_UNSIGNED(t) ? UMIN_OF_SIZE(TYPE_LENGTH(t)) \
1143     : MIN_OF_SIZE(TYPE_LENGTH(t)))
1144
1145 /* Allocate space for storing data associated with a particular type.
1146    We ensure that the space is allocated using the same mechanism that
1147    was used to allocate the space for the type structure itself.  I.E.
1148    if the type is on an objfile's objfile_obstack, then the space for data
1149    associated with that type will also be allocated on the objfile_obstack.
1150    If the type is not associated with any particular objfile (such as
1151    builtin types), then the data space will be allocated with xmalloc,
1152    the same as for the type structure. */
1153
1154 #define TYPE_ALLOC(t,size)  \
1155    (TYPE_OBJFILE (t) != NULL  \
1156     ? obstack_alloc (&TYPE_OBJFILE (t) -> objfile_obstack, size) \
1157     : xmalloc (size))
1158
1159 extern struct type *alloc_type (struct objfile *);
1160
1161 extern struct type *init_type (enum type_code, int, int, char *,
1162                                struct objfile *);
1163
1164 /* Helper functions to construct a struct or record type.  An
1165    initially empty type is created using init_composite_type().
1166    Fields are then added using append_struct_type_field().  A union
1167    type has its size set to the largest field.  A struct type has each
1168    field packed against the previous.  */
1169
1170 extern struct type *init_composite_type (char *name, enum type_code code);
1171 extern void append_composite_type_field (struct type *t, char *name,
1172                                          struct type *field);
1173
1174 extern struct type *lookup_reference_type (struct type *);
1175
1176 extern struct type *make_reference_type (struct type *, struct type **);
1177
1178 extern struct type *make_cv_type (int, int, struct type *, struct type **);
1179
1180 extern void replace_type (struct type *, struct type *);
1181
1182 extern int address_space_name_to_int (char *);
1183
1184 extern const char *address_space_int_to_name (int);
1185
1186 extern struct type *make_type_with_address_space (struct type *type,
1187                                                   int space_identifier);
1188
1189 extern struct type *lookup_member_type (struct type *, struct type *);
1190
1191 extern void
1192 smash_to_method_type (struct type *type, struct type *domain,
1193                       struct type *to_type, struct field *args,
1194                       int nargs, int varargs);
1195
1196 extern void smash_to_member_type (struct type *, struct type *, struct type *);
1197
1198 extern struct type *allocate_stub_method (struct type *);
1199
1200 extern char *type_name_no_tag (const struct type *);
1201
1202 extern struct type *lookup_struct_elt_type (struct type *, char *, int);
1203
1204 extern struct type *make_pointer_type (struct type *, struct type **);
1205
1206 extern struct type *lookup_pointer_type (struct type *);
1207
1208 extern struct type *make_function_type (struct type *, struct type **);
1209
1210 extern struct type *lookup_function_type (struct type *);
1211
1212 extern struct type *create_range_type (struct type *, struct type *, int,
1213                                        int);
1214
1215 extern struct type *create_array_type (struct type *, struct type *,
1216                                        struct type *);
1217
1218 extern struct type *create_string_type (struct type *, struct type *);
1219
1220 extern struct type *create_set_type (struct type *, struct type *);
1221
1222 extern struct type *lookup_unsigned_typename (char *);
1223
1224 extern struct type *lookup_signed_typename (char *);
1225
1226 extern struct type *check_typedef (struct type *);
1227
1228 #define CHECK_TYPEDEF(TYPE) (TYPE) = check_typedef (TYPE)
1229
1230 extern void check_stub_method_group (struct type *, int);
1231
1232 extern char *gdb_mangle_name (struct type *, int, int);
1233
1234 extern struct type *lookup_typename (char *, struct block *, int);
1235
1236 extern struct type *lookup_template_type (char *, struct type *,
1237                                           struct block *);
1238
1239 extern struct type *lookup_fundamental_type (struct objfile *, int);
1240
1241 extern void fill_in_vptr_fieldno (struct type *);
1242
1243 extern int get_destructor_fn_field (struct type *, int *, int *);
1244
1245 extern int get_discrete_bounds (struct type *, LONGEST *, LONGEST *);
1246
1247 extern int is_ancestor (struct type *, struct type *);
1248
1249 extern int has_vtable (struct type *);
1250
1251 extern struct type *primary_base_class (struct type *);
1252
1253 extern struct type **virtual_base_list (struct type *);
1254
1255 extern int virtual_base_list_length (struct type *);
1256 extern int virtual_base_list_length_skip_primaries (struct type *);
1257
1258 extern int virtual_base_index (struct type *, struct type *);
1259 extern int virtual_base_index_skip_primaries (struct type *, struct type *);
1260
1261
1262 extern int class_index_in_primary_list (struct type *);
1263
1264 extern int count_virtual_fns (struct type *);
1265
1266 /* Constants for HP/Taligent ANSI C++ runtime model */
1267
1268 /* Where virtual function entries begin in the
1269  * virtual table, in the non-RRBC vtable format.
1270  * First 4 are the metavtable pointer, top offset,
1271  * typeinfo pointer, and dup base info pointer */
1272 #define HP_ACC_VFUNC_START        4
1273
1274 /* (Negative) Offset where virtual base offset entries begin
1275  * in the virtual table. Skips over metavtable pointer and
1276  * the self-offset entry.
1277  * NOTE: NEGATE THIS BEFORE USING! The virtual base offsets
1278  * appear before the address point of the vtable (the slot
1279  * pointed to by the object's vtable pointer), i.e. at lower
1280  * addresses than the vtable pointer. */
1281 #define HP_ACC_VBASE_START        2
1282
1283 /* (Positive) Offset where the pointer to the typeinfo
1284  * object is present in the virtual table */
1285 #define HP_ACC_TYPEINFO_OFFSET    2
1286
1287 /* (Positive) Offset where the ``top offset'' entry of
1288  * the virtual table is */
1289 #define HP_ACC_TOP_OFFSET_OFFSET  1
1290
1291 /* Overload resolution */
1292
1293 #define LENGTH_MATCH(bv) ((bv)->rank[0])
1294
1295 /* Badness if parameter list length doesn't match arg list length */
1296 #define LENGTH_MISMATCH_BADNESS      100
1297 /* Dummy badness value for nonexistent parameter positions */
1298 #define TOO_FEW_PARAMS_BADNESS       100
1299 /* Badness if no conversion among types */
1300 #define INCOMPATIBLE_TYPE_BADNESS    100
1301
1302 /* Badness of integral promotion */
1303 #define INTEGER_PROMOTION_BADNESS      1
1304 /* Badness of floating promotion */
1305 #define FLOAT_PROMOTION_BADNESS        1
1306 /* Badness of integral conversion */
1307 #define INTEGER_CONVERSION_BADNESS     2
1308 /* Badness of floating conversion */
1309 #define FLOAT_CONVERSION_BADNESS       2
1310 /* Badness of integer<->floating conversions */
1311 #define INT_FLOAT_CONVERSION_BADNESS   2
1312 /* Badness of converting to a boolean */
1313 #define BOOLEAN_CONVERSION_BADNESS     2
1314 /* Badness of pointer conversion */
1315 #define POINTER_CONVERSION_BADNESS     2
1316 /* Badness of conversion of pointer to void pointer */
1317 #define VOID_PTR_CONVERSION_BADNESS    2
1318 /* Badness of converting derived to base class */
1319 #define BASE_CONVERSION_BADNESS        2
1320 /* Badness of converting from non-reference to reference */
1321 #define REFERENCE_CONVERSION_BADNESS   2
1322
1323 /* Non-standard conversions allowed by the debugger */
1324 /* Converting a pointer to an int is usually OK */
1325 #define NS_POINTER_CONVERSION_BADNESS 10
1326
1327
1328 extern int compare_badness (struct badness_vector *, struct badness_vector *);
1329
1330 extern struct badness_vector *rank_function (struct type **, int,
1331                                              struct type **, int);
1332
1333 extern int rank_one_type (struct type *, struct type *);
1334
1335 extern void recursive_dump_type (struct type *, int);
1336
1337 /* printcmd.c */
1338
1339 extern void print_scalar_formatted (void *, struct type *, int, int,
1340                                     struct ui_file *);
1341
1342 extern int can_dereference (struct type *);
1343
1344 extern int is_integral_type (struct type *);
1345
1346 extern void maintenance_print_type (char *, int);
1347
1348 #endif /* GDBTYPES_H */