gdb/stabsread.c - gdb

Global variables defined

Data types defined

Functions defined

Macros defined

Source code

  1. /* Support routines for decoding "stabs" debugging information format.

  3.    Copyright (C) 1986-2015 Free Software Foundation, Inc.

  5.    This file is part of GDB.

  7.    This program is free software; you can redistribute it and/or modify
  8.    it under the terms of the GNU General Public License as published by
  9.    the Free Software Foundation; either version 3 of the License, or
  10.    (at your option) any later version.

  12.    This program is distributed in the hope that it will be useful,
  13.    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14.    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15.    GNU General Public License for more details.

  17.    You should have received a copy of the GNU General Public License
  18.    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

  20. /* Support routines for reading and decoding debugging information in
  21.    the "stabs" format.  This format is used with many systems that use
  22.    the a.out object file format, as well as some systems that use
  23.    COFF or ELF where the stabs data is placed in a special section.
  24.    Avoid placing any object file format specific code in this file.  */

  26. #include "defs.h"
  27. #include "bfd.h"
  28. #include "gdb_obstack.h"
  29. #include "symtab.h"
  30. #include "gdbtypes.h"
  31. #include "expression.h"
  32. #include "symfile.h"
  33. #include "objfiles.h"
  34. #include "aout/stab_gnu.h"        /* We always use GNU stabs, not native.  */
  35. #include "libaout.h"
  36. #include "aout/aout64.h"
  37. #include "gdb-stabs.h"
  38. #include "buildsym.h"
  39. #include "complaints.h"
  40. #include "demangle.h"
  41. #include "gdb-demangle.h"
  42. #include "language.h"
  43. #include "doublest.h"
  44. #include "cp-abi.h"
  45. #include "cp-support.h"
  46. #include <ctype.h>

  48. /* Ask stabsread.h to define the vars it normally declares `extern'.  */
  49. ‌#define        EXTERN
  50. /**/
  51. #include "stabsread.h"                /* Our own declarations */
  52. ‌#undef        EXTERN

  54. extern void _initialize_stabsread (void);

  56. /* The routines that read and process a complete stabs for a C struct or
  57.    C++ class pass lists of data member fields and lists of member function
  58.    fields in an instance of a field_info structure, as defined below.
  59.    This is part of some reorganization of low level C++ support and is
  60.    expected to eventually go away...  (FIXME) */

  62. ‌struct field_info
  63.   {
  64. ‌    struct nextfield
  65.       {
  66.         struct nextfield *next;

  68.         /* This is the raw visibility from the stab.  It is not checked
  69.            for being one of the visibilities we recognize, so code which
  70.            examines this field better be able to deal.  */
  71.         int visibility;

  73.         struct field field;
  74.       }
  75.      *list;
  76. ‌    struct next_fnfieldlist
  77.       {
  78.         struct next_fnfieldlist *next;
  79.         struct fn_fieldlist fn_fieldlist;
  80.       }
  81.      *fnlist;
  82.   };

  84. static void
  85. read_one_struct_field (struct field_info *, char **, char *,
  86.                        struct type *, struct objfile *);

  88. static struct type *dbx_alloc_type (int[2], struct objfile *);

  90. static long read_huge_number (char **, int, int *, int);

  92. static struct type *error_type (char **, struct objfile *);

  94. static void
  95. patch_block_stabs (struct pending *, struct pending_stabs *,
  96.                    struct objfile *);

  98. static void fix_common_block (struct symbol *, CORE_ADDR);

  100. static int read_type_number (char **, int *);

  102. static struct type *read_type (char **, struct objfile *);

  104. static struct type *read_range_type (char **, int[2], int, struct objfile *);

  106. static struct type *read_sun_builtin_type (char **, int[2], struct objfile *);

  108. static struct type *read_sun_floating_type (char **, int[2],
  109.                                             struct objfile *);

  111. static struct type *read_enum_type (char **, struct type *, struct objfile *);

  113. static struct type *rs6000_builtin_type (int, struct objfile *);

  115. static int
  116. read_member_functions (struct field_info *, char **, struct type *,
  117.                        struct objfile *);

  119. static int
  120. read_struct_fields (struct field_info *, char **, struct type *,
  121.                     struct objfile *);

  123. static int
  124. read_baseclasses (struct field_info *, char **, struct type *,
  125.                   struct objfile *);

  127. static int
  128. read_tilde_fields (struct field_info *, char **, struct type *,
  129.                    struct objfile *);

  131. static int attach_fn_fields_to_type (struct field_info *, struct type *);

  133. static int attach_fields_to_type (struct field_info *, struct type *,
  134.                                   struct objfile *);

  136. static struct type *read_struct_type (char **, struct type *,
  137.                                       enum type_code,
  138.                                       struct objfile *);

  140. static struct type *read_array_type (char **, struct type *,
  141.                                      struct objfile *);

  143. static struct field *read_args (char **, int, struct objfile *, int *, int *);

  145. static void add_undefined_type (struct type *, int[2]);

  147. static int
  148. read_cpp_abbrev (struct field_info *, char **, struct type *,
  149.                  struct objfile *);

  151. static char *find_name_end (char *name);

  153. static int process_reference (char **string);

  155. void stabsread_clear_cache (void);

  157. ‌static const char vptr_name[] = "_vptr$";
  158. ‌static const char vb_name[] = "_vb$";

  160. static void
  161. ‌invalid_cpp_abbrev_complaint (const char *arg1)
  162. {
  163.   complaint (&symfile_complaints, _("invalid C++ abbreviation `%s'"), arg1);
  164. }

  166. static void
  167. ‌reg_value_complaint (int regnum, int num_regs, const char *sym)
  168. {
  169.   complaint (&symfile_complaints,
  170.              _("register number %d too large (max %d) in symbol %s"),
  171.              regnum, num_regs - 1, sym);
  172. }

  174. static void
  175. ‌stabs_general_complaint (const char *arg1)
  176. {
  177.   complaint (&symfile_complaints, "%s", arg1);
  178. }

  180. /* Make a list of forward references which haven't been defined.  */

  182. ‌static struct type **undef_types;
  183. ‌static int undef_types_allocated;
  184. ‌static int undef_types_length;
  185. ‌static struct symbol *current_symbol = NULL;

  187. /* Make a list of nameless types that are undefined.
  188.    This happens when another type is referenced by its number
  189.    before this type is actually defined.  For instance "t(0,1)=k(0,2)"
  190.    and type (0,2) is defined only later.  */

  192. ‌struct nat
  193. {
  194.   int typenums[2];
  195.   struct type *type;
  196. };
  197. ‌static struct nat *noname_undefs;
  198. ‌static int noname_undefs_allocated;
  199. ‌static int noname_undefs_length;

  201. /* Check for and handle cretinous stabs symbol name continuation!  */
  202. ‌#define STABS_CONTINUE(pp,objfile)                                \
  203.   do {                                                        \
  204.     if (**(pp) == '\\' || (**(pp) == '?' && (*(pp))[1] == '\0')) \
  205.       *(pp) = next_symbol_text (objfile);        \
  206.   } while (0)

  208. /* Vector of types defined so far, indexed by their type numbers.
  209.    (In newer sun systems, dbx uses a pair of numbers in parens,
  210.    as in "(SUBFILENUM,NUMWITHINSUBFILE)".
  211.    Then these numbers must be translated through the type_translations
  212.    hash table to get the index into the type vector.)  */

  214. ‌static struct type **type_vector;

  216. /* Number of elements allocated for type_vector currently.  */

  218. ‌static int type_vector_length;

  220. /* Initial size of type vector.  Is realloc'd larger if needed, and
  221.    realloc'd down to the size actually used, when completed.  */

  223. ‌#define INITIAL_TYPE_VECTOR_LENGTH 160


  226. /* Look up a dbx type-number pair.  Return the address of the slot
  227.    where the type for that number-pair is stored.
  228.    The number-pair is in TYPENUMS.

  230.    This can be used for finding the type associated with that pair
  231.    or for associating a new type with the pair.  */

  233. static struct type **
  234. ‌dbx_lookup_type (int typenums[2], struct objfile *objfile)
  235. {
  236.   int filenum = typenums[0];
  237.   int index = typenums[1];
  238.   unsigned old_len;
  239.   int real_filenum;
  240.   struct header_file *f;
  241.   int f_orig_length;

  243.   if (filenum == -1)                /* -1,-1 is for temporary types.  */
  244.     return 0;

  246.   if (filenum < 0 || filenum >= n_this_object_header_files)
  247.     {
  248.       complaint (&symfile_complaints,
  249.                  _("Invalid symbol data: type number "
  250.                    "(%d,%d) out of range at symtab pos %d."),
  251.                  filenum, index, symnum);
  252.       goto error_return;
  253.     }

  255.   if (filenum == 0)
  256.     {
  257.       if (index < 0)
  258.         {
  259.           /* Caller wants address of address of type.  We think
  260.              that negative (rs6k builtin) types will never appear as
  261.              "lvalues", (nor should they), so we stuff the real type
  262.              pointer into a temp, and return its address.  If referenced,
  263.              this will do the right thing.  */
  264.           static struct type *temp_type;

  266.           temp_type = rs6000_builtin_type (index, objfile);
  267.           return &temp_type;
  268.         }

  270.       /* Type is defined outside of header files.
  271.          Find it in this object file's type vector.  */
  272.       if (index >= type_vector_length)
  273.         {
  274.           old_len = type_vector_length;
  275.           if (old_len == 0)
  276.             {
  277.               type_vector_length = INITIAL_TYPE_VECTOR_LENGTH;
  278.               type_vector = (struct type **)
  279.                 xmalloc (type_vector_length * sizeof (struct type *));
  280.             }
  281.           while (index >= type_vector_length)
  282.             {
  283.               type_vector_length *= 2;
  284.             }
  285.           type_vector = (struct type **)
  286.             xrealloc ((char *) type_vector,
  287.                       (type_vector_length * sizeof (struct type *)));
  288.           memset (&type_vector[old_len], 0,
  289.                   (type_vector_length - old_len) * sizeof (struct type *));
  290.         }
  291.       return (&type_vector[index]);
  292.     }
  293.   else
  294.     {
  295.       real_filenum = this_object_header_files[filenum];

  297.       if (real_filenum >= N_HEADER_FILES (objfile))
  298.         {
  299.           static struct type *temp_type;

  301.           warning (_("GDB internal error: bad real_filenum"));

  303.         error_return:
  304.           temp_type = objfile_type (objfile)->builtin_error;
  305.           return &temp_type;
  306.         }

  308.       f = HEADER_FILES (objfile) + real_filenum;

  310.       f_orig_length = f->length;
  311.       if (index >= f_orig_length)
  312.         {
  313.           while (index >= f->length)
  314.             {
  315.               f->length *= 2;
  316.             }
  317.           f->vector = (struct type **)
  318.             xrealloc ((char *) f->vector, f->length * sizeof (struct type *));
  319.           memset (&f->vector[f_orig_length], 0,
  320.                   (f->length - f_orig_length) * sizeof (struct type *));
  321.         }
  322.       return (&f->vector[index]);
  323.     }
  324. }

  326. /* Make sure there is a type allocated for type numbers TYPENUMS
  327.    and return the type object.
  328.    This can create an empty (zeroed) type object.
  329.    TYPENUMS may be (-1, -1) to return a new type object that is not
  330.    put into the type vector, and so may not be referred to by number.  */

  332. static struct type *
  333. ‌dbx_alloc_type (int typenums[2], struct objfile *objfile)
  334. {
  335.   struct type **type_addr;

  337.   if (typenums[0] == -1)
  338.     {
  339.       return (alloc_type (objfile));
  340.     }

  342.   type_addr = dbx_lookup_type (typenums, objfile);

  344.   /* If we are referring to a type not known at all yet,
  345.      allocate an empty type for it.
  346.      We will fill it in later if we find out how.  */
  347.   if (*type_addr == 0)
  348.     {
  349.       *type_addr = alloc_type (objfile);
  350.     }

  352.   return (*type_addr);
  353. }

  355. /* for all the stabs in a given stab vector, build appropriate types
  356.    and fix their symbols in given symbol vector.  */

  358. static void
  359. ‌patch_block_stabs (struct pending *symbols, struct pending_stabs *stabs,
  360.                    struct objfile *objfile)
  361. {
  362.   int ii;
  363.   char *name;
  364.   char *pp;
  365.   struct symbol *sym;

  367.   if (stabs)
  368.     {
  369.       /* for all the stab entries, find their corresponding symbols and
  370.          patch their types!  */

  372.       for (ii = 0; ii < stabs->count; ++ii)
  373.         {
  374.           name = stabs->stab[ii];
  375.           pp = (char *) strchr (name, ':');
  376.           gdb_assert (pp);        /* Must find a ':' or game's over.  */
  377.           while (pp[1] == ':')
  378.             {
  379.               pp += 2;
  380.               pp = (char *) strchr (pp, ':');
  381.             }
  382.           sym = find_symbol_in_list (symbols, name, pp - name);
  383.           if (!sym)
  384.             {
  385.               /* FIXME-maybe: it would be nice if we noticed whether
  386.                  the variable was defined *anywhere*, not just whether
  387.                  it is defined in this compilation unit.  But neither
  388.                  xlc or GCC seem to need such a definition, and until
  389.                  we do psymtabs (so that the minimal symbols from all
  390.                  compilation units are available now), I'm not sure
  391.                  how to get the information.  */

  393.               /* On xcoff, if a global is defined and never referenced,
  394.                  ld will remove it from the executable.  There is then
  395.                  a N_GSYM stab for it, but no regular (C_EXT) symbol.  */
  396.               sym = allocate_symbol (objfile);
  397.               SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
  398.               SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT;
  399.               SYMBOL_SET_LINKAGE_NAME
  400.                 (sym, obstack_copy0 (&objfile->objfile_obstack,
  401.                                      name, pp - name));
  402.               pp += 2;
  403.               if (*(pp - 1) == 'F' || *(pp - 1) == 'f')
  404.                 {
  405.                   /* I don't think the linker does this with functions,
  406.                      so as far as I know this is never executed.
  407.                      But it doesn't hurt to check.  */
  408.                   SYMBOL_TYPE (sym) =
  409.                     lookup_function_type (read_type (&pp, objfile));
  410.                 }
  411.               else
  412.                 {
  413.                   SYMBOL_TYPE (sym) = read_type (&pp, objfile);
  414.                 }
  415.               add_symbol_to_list (sym, &global_symbols);
  416.             }
  417.           else
  418.             {
  419.               pp += 2;
  420.               if (*(pp - 1) == 'F' || *(pp - 1) == 'f')
  421.                 {
  422.                   SYMBOL_TYPE (sym) =
  423.                     lookup_function_type (read_type (&pp, objfile));
  424.                 }
  425.               else
  426.                 {
  427.                   SYMBOL_TYPE (sym) = read_type (&pp, objfile);
  428.                 }
  429.             }
  430.         }
  431.     }
  432. }


  435. /* Read a number by which a type is referred to in dbx data,
  436.    or perhaps read a pair (FILENUM, TYPENUM) in parentheses.
  437.    Just a single number N is equivalent to (0,N).
  438.    Return the two numbers by storing them in the vector TYPENUMS.
  439.    TYPENUMS will then be used as an argument to dbx_lookup_type.

  441.    Returns 0 for success, -1 for error.  */

  443. static int
  444. ‌read_type_number (char **pp, int *typenums)
  445. {
  446.   int nbits;

  448.   if (**pp == '(')
  449.     {
  450.       (*pp)++;
  451.       typenums[0] = read_huge_number (pp, ',', &nbits, 0);
  452.       if (nbits != 0)
  453.         return -1;
  454.       typenums[1] = read_huge_number (pp, ')', &nbits, 0);
  455.       if (nbits != 0)
  456.         return -1;
  457.     }
  458.   else
  459.     {
  460.       typenums[0] = 0;
  461.       typenums[1] = read_huge_number (pp, 0, &nbits, 0);
  462.       if (nbits != 0)
  463.         return -1;
  464.     }
  465.   return 0;
  466. }


  469. ‌#define VISIBILITY_PRIVATE        '0'        /* Stabs character for private field */
  470. ‌#define VISIBILITY_PROTECTED        '1'        /* Stabs character for protected fld */
  471. ‌#define VISIBILITY_PUBLIC        '2'        /* Stabs character for public field */
  472. ‌#define VISIBILITY_IGNORE        '9'        /* Optimized out or zero length */

  474. /* Structure for storing pointers to reference definitions for fast lookup
  475.    during "process_later".  */

  477. ‌struct ref_map
  478. {
  479.   char *stabs;
  480.   CORE_ADDR value;
  481.   struct symbol *sym;
  482. };

  484. ‌#define MAX_CHUNK_REFS 100
  485. ‌#define REF_CHUNK_SIZE (MAX_CHUNK_REFS * sizeof (struct ref_map))
  486. ‌#define REF_MAP_SIZE(ref_chunk) ((ref_chunk) * REF_CHUNK_SIZE)

  488. ‌static struct ref_map *ref_map;

  490. /* Ptr to free cell in chunk's linked list.  */
  491. ‌static int ref_count = 0;

  493. /* Number of chunks malloced.  */
  494. ‌static int ref_chunk = 0;

  496. /* This file maintains a cache of stabs aliases found in the symbol
  497.    table.  If the symbol table changes, this cache must be cleared
  498.    or we are left holding onto data in invalid obstacks.  */
  499. void
  500. ‌stabsread_clear_cache (void)
  501. {
  502.   ref_count = 0;
  503.   ref_chunk = 0;
  504. }

  506. /* Create array of pointers mapping refids to symbols and stab strings.
  507.    Add pointers to reference definition symbols and/or their values as we
  508.    find them, using their reference numbers as our index.
  509.    These will be used later when we resolve references.  */
  510. void
  511. ‌ref_add (int refnum, struct symbol *sym, char *stabs, CORE_ADDR value)
  512. {
  513.   if (ref_count == 0)
  514.     ref_chunk = 0;
  515.   if (refnum >= ref_count)
  516.     ref_count = refnum + 1;
  517.   if (ref_count > ref_chunk * MAX_CHUNK_REFS)
  518.     {
  519.       int new_slots = ref_count - ref_chunk * MAX_CHUNK_REFS;
  520.       int new_chunks = new_slots / MAX_CHUNK_REFS + 1;

  522.       ref_map = (struct ref_map *)
  523.         xrealloc (ref_map, REF_MAP_SIZE (ref_chunk + new_chunks));
  524.       memset (ref_map + ref_chunk * MAX_CHUNK_REFS, 0,
  525.               new_chunks * REF_CHUNK_SIZE);
  526.       ref_chunk += new_chunks;
  527.     }
  528.   ref_map[refnum].stabs = stabs;
  529.   ref_map[refnum].sym = sym;
  530.   ref_map[refnum].value = value;
  531. }

  533. /* Return defined sym for the reference REFNUM.  */
  534. struct symbol *
  535. ‌ref_search (int refnum)
  536. {
  537.   if (refnum < 0 || refnum > ref_count)
  538.     return 0;
  539.   return ref_map[refnum].sym;
  540. }

  542. /* Parse a reference id in STRING and return the resulting
  543.    reference number.  Move STRING beyond the reference id.  */

  545. static int
  546. ‌process_reference (char **string)
  547. {
  548.   char *p;
  549.   int refnum = 0;

  551.   if (**string != '#')
  552.     return 0;

  554.   /* Advance beyond the initial '#'.  */
  555.   p = *string + 1;

  557.   /* Read number as reference id.  */
  558.   while (*p && isdigit (*p))
  559.     {
  560.       refnum = refnum * 10 + *p - '0';
  561.       p++;
  562.     }
  563.   *string = p;
  564.   return refnum;
  565. }

  567. /* If STRING defines a reference, store away a pointer to the reference
  568.    definition for later use.  Return the reference number.  */

  570. int
  571. ‌symbol_reference_defined (char **string)
  572. {
  573.   char *p = *string;
  574.   int refnum = 0;

  576.   refnum = process_reference (&p);

  578.   /* Defining symbols end in '='.  */
  579.   if (*p == '=')
  580.     {
  581.       /* Symbol is being defined here.  */
  582.       *string = p + 1;
  583.       return refnum;
  584.     }
  585.   else
  586.     {
  587.       /* Must be a reference.  Either the symbol has already been defined,
  588.          or this is a forward reference to it.  */
  589.       *string = p;
  590.       return -1;
  591.     }
  592. }

  594. static int
  595. ‌stab_reg_to_regnum (struct symbol *sym, struct gdbarch *gdbarch)
  596. {
  597.   int regno = gdbarch_stab_reg_to_regnum (gdbarch, SYMBOL_VALUE (sym));

  599.   if (regno >= gdbarch_num_regs (gdbarch)
  600.                 + gdbarch_num_pseudo_regs (gdbarch))
  601.     {
  602.       reg_value_complaint (regno,
  603.                            gdbarch_num_regs (gdbarch)
  604.                              + gdbarch_num_pseudo_regs (gdbarch),
  605.                            SYMBOL_PRINT_NAME (sym));

  607.       regno = gdbarch_sp_regnum (gdbarch); /* Known safe, though useless.  */
  608.     }

  610.   return regno;
  611. }

  613. ‌static const struct symbol_register_ops stab_register_funcs = {
  614.   stab_reg_to_regnum
  615. };

  617. /* The "aclass" indices for computed symbols.  */

  619. ‌static int stab_register_index;
  620. ‌static int stab_regparm_index;

  622. struct symbol *
  623. ‌define_symbol (CORE_ADDR valu, char *string, int desc, int type,
  624.                struct objfile *objfile)
  625. {
  626.   struct gdbarch *gdbarch = get_objfile_arch (objfile);
  627.   struct symbol *sym;
  628.   char *p = (char *) find_name_end (string);
  629.   int deftype;
  630.   int synonym = 0;
  631.   int i;
  632.   char *new_name = NULL;

  634.   /* We would like to eliminate nameless symbols, but keep their types.
  635.      E.g. stab entry ":t10=*2" should produce a type 10, which is a pointer
  636.      to type 2, but, should not create a symbol to address that type.  Since
  637.      the symbol will be nameless, there is no way any user can refer to it.  */

  639.   int nameless;

  641.   /* Ignore syms with empty names.  */
  642.   if (string[0] == 0)
  643.     return 0;

  645.   /* Ignore old-style symbols from cc -go.  */
  646.   if (p == 0)
  647.     return 0;

  649.   while (p[1] == ':')
  650.     {
  651.       p += 2;
  652.       p = strchr (p, ':');
  653.       if (p == NULL)
  654.         {
  655.           complaint (&symfile_complaints,
  656.                      _("Bad stabs string '%s'"), string);
  657.           return NULL;
  658.         }
  659.     }

  661.   /* If a nameless stab entry, all we need is the type, not the symbol.
  662.      e.g. ":t10=*2" or a nameless enum like " :T16=ered:0,green:1,blue:2,;" */
  663.   nameless = (p == string || ((string[0] == ' ') && (string[1] == ':')));

  665.   current_symbol = sym = allocate_symbol (objfile);

  667.   if (processing_gcc_compilation)
  668.     {
  669.       /* GCC 2.x puts the line number in desc.  SunOS apparently puts in the
  670.          number of bytes occupied by a type or object, which we ignore.  */
  671.       SYMBOL_LINE (sym) = desc;
  672.     }
  673.   else
  674.     {
  675.       SYMBOL_LINE (sym) = 0;        /* unknown */
  676.     }

  678.   SYMBOL_SET_LANGUAGE (sym, current_subfile->language,
  679.                        &objfile->objfile_obstack);

  681.   if (is_cplus_marker (string[0]))
  682.     {
  683.       /* Special GNU C++ names.  */
  684.       switch (string[1])
  685.         {
  686.         case 't':
  687.           SYMBOL_SET_LINKAGE_NAME (sym, "this");
  688.           break;

  690.         case 'v':                /* $vtbl_ptr_type */
  691.           goto normal;

  693.         case 'e':
  694.           SYMBOL_SET_LINKAGE_NAME (sym, "eh_throw");
  695.           break;

  697.         case '_':
  698.           /* This was an anonymous type that was never fixed up.  */
  699.           goto normal;

  701.         case 'X':
  702.           /* SunPRO (3.0 at least) static variable encoding.  */
  703.           if (gdbarch_static_transform_name_p (gdbarch))
  704.             goto normal;
  705.           /* ... fall through ...  */

  707.         default:
  708.           complaint (&symfile_complaints, _("Unknown C++ symbol name `%s'"),
  709.                      string);
  710.           goto normal;                /* Do *something* with it.  */
  711.         }
  712.     }
  713.   else
  714.     {
  715.     normal:
  716.       if (SYMBOL_LANGUAGE (sym) == language_cplus)
  717.         {
  718.           char *name = alloca (p - string + 1);

  720.           memcpy (name, string, p - string);
  721.           name[p - string] = '\0';
  722.           new_name = cp_canonicalize_string (name);
  723.         }
  724.       if (new_name != NULL)
  725.         {
  726.           SYMBOL_SET_NAMES (sym, new_name, strlen (new_name), 1, objfile);
  727.           xfree (new_name);
  728.         }
  729.       else
  730.         SYMBOL_SET_NAMES (sym, string, p - string, 1, objfile);

  732.       if (SYMBOL_LANGUAGE (sym) == language_cplus)
  733.         cp_scan_for_anonymous_namespaces (sym, objfile);

  735.     }
  736.   p++;

  738.   /* Determine the type of name being defined.  */
  739. #if 0
  740.   /* Getting GDB to correctly skip the symbol on an undefined symbol
  741.      descriptor and not ever dump core is a very dodgy proposition if
  742.      we do things this way.  I say the acorn RISC machine can just
  743.      fix their compiler.  */
  744.   /* The Acorn RISC machine's compiler can put out locals that don't
  745.      start with "234=" or "(3,4)=", so assume anything other than the
  746.      deftypes we know how to handle is a local.  */
  747.   if (!strchr ("cfFGpPrStTvVXCR", *p))
  748. #else
  749.   if (isdigit (*p) || *p == '(' || *p == '-')
  750. #endif
  751.     deftype = 'l';
  752.   else
  753.     deftype = *p++;

  755.   switch (deftype)
  756.     {
  757.     case 'c':
  758.       /* c is a special case, not followed by a type-number.
  759.          SYMBOL:c=iVALUE for an integer constant symbol.
  760.          SYMBOL:c=rVALUE for a floating constant symbol.
  761.          SYMBOL:c=eTYPE,INTVALUE for an enum constant symbol.
  762.          e.g. "b:c=e6,0" for "const b = blob1"
  763.          (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;").  */
  764.       if (*p != '=')
  765.         {
  766.           SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
  767.           SYMBOL_TYPE (sym) = error_type (&p, objfile);
  768.           SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
  769.           add_symbol_to_list (sym, &file_symbols);
  770.           return sym;
  771.         }
  772.       ++p;
  773.       switch (*p++)
  774.         {
  775.         case 'r':
  776.           {
  777.             double d = atof (p);
  778.             gdb_byte *dbl_valu;
  779.             struct type *dbl_type;

  781.             /* FIXME-if-picky-about-floating-accuracy: Should be using
  782.                target arithmetic to get the value.  real.c in GCC
  783.                probably has the necessary code.  */

  785.             dbl_type = objfile_type (objfile)->builtin_double;
  786.             dbl_valu =
  787.               obstack_alloc (&objfile->objfile_obstack,
  788.                              TYPE_LENGTH (dbl_type));
  789.             store_typed_floating (dbl_valu, dbl_type, d);

  791.             SYMBOL_TYPE (sym) = dbl_type;
  792.             SYMBOL_VALUE_BYTES (sym) = dbl_valu;
  793.             SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES;
  794.           }
  795.           break;
  796.         case 'i':
  797.           {
  798.             /* Defining integer constants this way is kind of silly,
  799.                since 'e' constants allows the compiler to give not
  800.                only the value, but the type as well.  C has at least
  801.                int, long, unsigned int, and long long as constant
  802.                types; other languages probably should have at least
  803.                unsigned as well as signed constants.  */

  805.             SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_long;
  806.             SYMBOL_VALUE (sym) = atoi (p);
  807.             SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
  808.           }
  809.           break;

  811.         case 'c':
  812.           {
  813.             SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_char;
  814.             SYMBOL_VALUE (sym) = atoi (p);
  815.             SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
  816.           }
  817.           break;

  819.         case 's':
  820.           {
  821.             struct type *range_type;
  822.             int ind = 0;
  823.             char quote = *p++;
  824.             gdb_byte *string_local = (gdb_byte *) alloca (strlen (p));
  825.             gdb_byte *string_value;

  827.             if (quote != '\'' && quote != '"')
  828.               {
  829.                 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
  830.                 SYMBOL_TYPE (sym) = error_type (&p, objfile);
  831.                 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
  832.                 add_symbol_to_list (sym, &file_symbols);
  833.                 return sym;
  834.               }

  836.             /* Find matching quote, rejecting escaped quotes.  */
  837.             while (*p && *p != quote)
  838.               {
  839.                 if (*p == '\\' && p[1] == quote)
  840.                   {
  841.                     string_local[ind] = (gdb_byte) quote;
  842.                     ind++;
  843.                     p += 2;
  844.                   }
  845.                 else if (*p)
  846.                   {
  847.                     string_local[ind] = (gdb_byte) (*p);
  848.                     ind++;
  849.                     p++;
  850.                   }
  851.               }
  852.             if (*p != quote)
  853.               {
  854.                 SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
  855.                 SYMBOL_TYPE (sym) = error_type (&p, objfile);
  856.                 SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
  857.                 add_symbol_to_list (sym, &file_symbols);
  858.                 return sym;
  859.               }

  861.             /* NULL terminate the string.  */
  862.             string_local[ind] = 0;
  863.             range_type
  864.               = create_static_range_type (NULL,
  865.                                           objfile_type (objfile)->builtin_int,
  866.                                           0, ind);
  867.             SYMBOL_TYPE (sym) = create_array_type (NULL,
  868.                                   objfile_type (objfile)->builtin_char,
  869.                                   range_type);
  870.             string_value = obstack_alloc (&objfile->objfile_obstack, ind + 1);
  871.             memcpy (string_value, string_local, ind + 1);
  872.             p++;

  874.             SYMBOL_VALUE_BYTES (sym) = string_value;
  875.             SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES;
  876.           }
  877.           break;

  879.         case 'e':
  880.           /* SYMBOL:c=eTYPE,INTVALUE for a constant symbol whose value
  881.              can be represented as integral.
  882.              e.g. "b:c=e6,0" for "const b = blob1"
  883.              (where type 6 is defined by "blobs:t6=eblob1:0,blob2:1,;").  */
  884.           {
  885.             SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
  886.             SYMBOL_TYPE (sym) = read_type (&p, objfile);

  888.             if (*p != ',')
  889.               {
  890.                 SYMBOL_TYPE (sym) = error_type (&p, objfile);
  891.                 break;
  892.               }
  893.             ++p;

  895.             /* If the value is too big to fit in an int (perhaps because
  896.                it is unsigned), or something like that, we silently get
  897.                a bogus value.  The type and everything else about it is
  898.                correct.  Ideally, we should be using whatever we have
  899.                available for parsing unsigned and long long values,
  900.                however.  */
  901.             SYMBOL_VALUE (sym) = atoi (p);
  902.           }
  903.           break;
  904.         default:
  905.           {
  906.             SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
  907.             SYMBOL_TYPE (sym) = error_type (&p, objfile);
  908.           }
  909.         }
  910.       SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
  911.       add_symbol_to_list (sym, &file_symbols);
  912.       return sym;

  914.     case 'C':
  915.       /* The name of a caught exception.  */
  916.       SYMBOL_TYPE (sym) = read_type (&p, objfile);
  917.       SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL;
  918.       SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
  919.       SYMBOL_VALUE_ADDRESS (sym) = valu;
  920.       add_symbol_to_list (sym, &local_symbols);
  921.       break;

  923.     case 'f':
  924.       /* A static function definition.  */
  925.       SYMBOL_TYPE (sym) = read_type (&p, objfile);
  926.       SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
  927.       SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
  928.       add_symbol_to_list (sym, &file_symbols);
  929.       /* fall into process_function_types.  */

  931.     process_function_types:
  932.       /* Function result types are described as the result type in stabs.
  933.          We need to convert this to the function-returning-type-X type
  934.          in GDB.  E.g. "int" is converted to "function returning int".  */
  935.       if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_FUNC)
  936.         SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym));

  938.       /* All functions in C++ have prototypes.  Stabs does not offer an
  939.          explicit way to identify prototyped or unprototyped functions,
  940.          but both GCC and Sun CC emit stabs for the "call-as" type rather
  941.          than the "declared-as" type for unprototyped functions, so
  942.          we treat all functions as if they were prototyped.  This is used
  943.          primarily for promotion when calling the function from GDB.  */
  944.       TYPE_PROTOTYPED (SYMBOL_TYPE (sym)) = 1;

  946.       /* fall into process_prototype_types.  */

  948.     process_prototype_types:
  949.       /* Sun acc puts declared types of arguments here.  */
  950.       if (*p == ';')
  951.         {
  952.           struct type *ftype = SYMBOL_TYPE (sym);
  953.           int nsemi = 0;
  954.           int nparams = 0;
  955.           char *p1 = p;

  957.           /* Obtain a worst case guess for the number of arguments
  958.              by counting the semicolons.  */
  959.           while (*p1)
  960.             {
  961.               if (*p1++ == ';')
  962.                 nsemi++;
  963.             }

  965.           /* Allocate parameter information fields and fill them in.  */
  966.           TYPE_FIELDS (ftype) = (struct field *)
  967.             TYPE_ALLOC (ftype, nsemi * sizeof (struct field));
  968.           while (*p++ == ';')
  969.             {
  970.               struct type *ptype;

  972.               /* A type number of zero indicates the start of varargs.
  973.                  FIXME: GDB currently ignores vararg functions.  */
  974.               if (p[0] == '0' && p[1] == '\0')
  975.                 break;
  976.               ptype = read_type (&p, objfile);

  978.               /* The Sun compilers mark integer arguments, which should
  979.                  be promoted to the width of the calling conventions, with
  980.                  a type which references itself.  This type is turned into
  981.                  a TYPE_CODE_VOID type by read_type, and we have to turn
  982.                  it back into builtin_int here.
  983.                  FIXME: Do we need a new builtin_promoted_int_arg ?  */
  984.               if (TYPE_CODE (ptype) == TYPE_CODE_VOID)
  985.                 ptype = objfile_type (objfile)->builtin_int;
  986.               TYPE_FIELD_TYPE (ftype, nparams) = ptype;
  987.               TYPE_FIELD_ARTIFICIAL (ftype, nparams++) = 0;
  988.             }
  989.           TYPE_NFIELDS (ftype) = nparams;
  990.           TYPE_PROTOTYPED (ftype) = 1;
  991.         }
  992.       break;

  994.     case 'F':
  995.       /* A global function definition.  */
  996.       SYMBOL_TYPE (sym) = read_type (&p, objfile);
  997.       SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;
  998.       SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
  999.       add_symbol_to_list (sym, &global_symbols);
  1000.       goto process_function_types;

  1002.     case 'G':
  1003.       /* For a class G (global) symbol, it appears that the
  1004.          value is not correct.  It is necessary to search for the
  1005.          corresponding linker definition to find the value.
  1006.          These definitions appear at the end of the namelist.  */
  1007.       SYMBOL_TYPE (sym) = read_type (&p, objfile);
  1008.       SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
  1009.       SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
  1010.       /* Don't add symbol references to global_sym_chain.
  1011.          Symbol references don't have valid names and wont't match up with
  1012.          minimal symbols when the global_sym_chain is relocated.
  1013.          We'll fixup symbol references when we fixup the defining symbol.  */
  1014.       if (SYMBOL_LINKAGE_NAME (sym) && SYMBOL_LINKAGE_NAME (sym)[0] != '#')
  1015.         {
  1016.           i = hashname (SYMBOL_LINKAGE_NAME (sym));
  1017.           SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
  1018.           global_sym_chain[i] = sym;
  1019.         }
  1020.       add_symbol_to_list (sym, &global_symbols);
  1021.       break;

  1023.       /* This case is faked by a conditional above,
  1024.          when there is no code letter in the dbx data.
  1025.          Dbx data never actually contains 'l'.  */
  1026.     case 's':
  1027.     case 'l':
  1028.       SYMBOL_TYPE (sym) = read_type (&p, objfile);
  1029.       SYMBOL_ACLASS_INDEX (sym) = LOC_LOCAL;
  1030.       SYMBOL_VALUE (sym) = valu;
  1031.       SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
  1032.       add_symbol_to_list (sym, &local_symbols);
  1033.       break;

  1035.     case 'p':
  1036.       if (*p == 'F')
  1037.         /* pF is a two-letter code that means a function parameter in Fortran.
  1038.            The type-number specifies the type of the return value.
  1039.            Translate it into a pointer-to-function type.  */
  1040.         {
  1041.           p++;
  1042.           SYMBOL_TYPE (sym)
  1043.             = lookup_pointer_type
  1044.             (lookup_function_type (read_type (&p, objfile)));
  1045.         }
  1046.       else
  1047.         SYMBOL_TYPE (sym) = read_type (&p, objfile);

  1049.       SYMBOL_ACLASS_INDEX (sym) = LOC_ARG;
  1050.       SYMBOL_VALUE (sym) = valu;
  1051.       SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
  1052.       SYMBOL_IS_ARGUMENT (sym) = 1;
  1053.       add_symbol_to_list (sym, &local_symbols);

  1055.       if (gdbarch_byte_order (gdbarch) != BFD_ENDIAN_BIG)
  1056.         {
  1057.           /* On little-endian machines, this crud is never necessary,
  1058.              and, if the extra bytes contain garbage, is harmful.  */
  1059.           break;
  1060.         }

  1062.       /* If it's gcc-compiled, if it says `short', believe it.  */
  1063.       if (processing_gcc_compilation
  1064.           || gdbarch_believe_pcc_promotion (gdbarch))
  1065.         break;

  1067.       if (!gdbarch_believe_pcc_promotion (gdbarch))
  1068.         {
  1069.           /* If PCC says a parameter is a short or a char, it is
  1070.              really an int.  */
  1071.           if (TYPE_LENGTH (SYMBOL_TYPE (sym))
  1072.               < gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT
  1073.               && TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_INT)
  1074.             {
  1075.               SYMBOL_TYPE (sym) =
  1076.                 TYPE_UNSIGNED (SYMBOL_TYPE (sym))
  1077.                 ? objfile_type (objfile)->builtin_unsigned_int
  1078.                 : objfile_type (objfile)->builtin_int;
  1079.             }
  1080.           break;
  1081.         }

  1083.     case 'P':
  1084.       /* acc seems to use P to declare the prototypes of functions that
  1085.          are referenced by this file.  gdb is not prepared to deal
  1086.          with this extra information.  FIXME, it ought to.  */
  1087.       if (type == N_FUN)
  1088.         {
  1089.           SYMBOL_TYPE (sym) = read_type (&p, objfile);
  1090.           goto process_prototype_types;
  1091.         }
  1092.       /*FALLTHROUGH */

  1094.     case 'R':
  1095.       /* Parameter which is in a register.  */
  1096.       SYMBOL_TYPE (sym) = read_type (&p, objfile);
  1097.       SYMBOL_ACLASS_INDEX (sym) = stab_register_index;
  1098.       SYMBOL_IS_ARGUMENT (sym) = 1;
  1099.       SYMBOL_VALUE (sym) = valu;
  1100.       SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
  1101.       add_symbol_to_list (sym, &local_symbols);
  1102.       break;

  1104.     case 'r':
  1105.       /* Register variable (either global or local).  */
  1106.       SYMBOL_TYPE (sym) = read_type (&p, objfile);
  1107.       SYMBOL_ACLASS_INDEX (sym) = stab_register_index;
  1108.       SYMBOL_VALUE (sym) = valu;
  1109.       SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
  1110.       if (within_function)
  1111.         {
  1112.           /* Sun cc uses a pair of symbols, one 'p' and one 'r', with
  1113.              the same name to represent an argument passed in a
  1114.              register.  GCC uses 'P' for the same case.  So if we find
  1115.              such a symbol pair we combine it into one 'P' symbol.
  1116.              For Sun cc we need to do this regardless of
  1117.              stabs_argument_has_addr, because the compiler puts out
  1118.              the 'p' symbol even if it never saves the argument onto
  1119.              the stack.

  1121.              On most machines, we want to preserve both symbols, so
  1122.              that we can still get information about what is going on
  1123.              with the stack (VAX for computing args_printed, using
  1124.              stack slots instead of saved registers in backtraces,
  1125.              etc.).

  1127.              Note that this code illegally combines
  1128.              main(argc) struct foo argc; { register struct foo argc; }
  1129.              but this case is considered pathological and causes a warning
  1130.              from a decent compiler.  */

  1132.           if (local_symbols
  1133.               && local_symbols->nsyms > 0
  1134.               && gdbarch_stabs_argument_has_addr (gdbarch, SYMBOL_TYPE (sym)))
  1135.             {
  1136.               struct symbol *prev_sym;

  1138.               prev_sym = local_symbols->symbol[local_symbols->nsyms - 1];
  1139.               if ((SYMBOL_CLASS (prev_sym) == LOC_REF_ARG
  1140.                    || SYMBOL_CLASS (prev_sym) == LOC_ARG)
  1141.                   && strcmp (SYMBOL_LINKAGE_NAME (prev_sym),
  1142.                              SYMBOL_LINKAGE_NAME (sym)) == 0)
  1143.                 {
  1144.                   SYMBOL_ACLASS_INDEX (prev_sym) = stab_register_index;
  1145.                   /* Use the type from the LOC_REGISTER; that is the type
  1146.                      that is actually in that register.  */
  1147.                   SYMBOL_TYPE (prev_sym) = SYMBOL_TYPE (sym);
  1148.                   SYMBOL_VALUE (prev_sym) = SYMBOL_VALUE (sym);
  1149.                   sym = prev_sym;
  1150.                   break;
  1151.                 }
  1152.             }
  1153.           add_symbol_to_list (sym, &local_symbols);
  1154.         }
  1155.       else
  1156.         add_symbol_to_list (sym, &file_symbols);
  1157.       break;

  1159.     case 'S':
  1160.       /* Static symbol at top level of file.  */
  1161.       SYMBOL_TYPE (sym) = read_type (&p, objfile);
  1162.       SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
  1163.       SYMBOL_VALUE_ADDRESS (sym) = valu;
  1164.       if (gdbarch_static_transform_name_p (gdbarch)
  1165.           && gdbarch_static_transform_name (gdbarch,
  1166.                                             SYMBOL_LINKAGE_NAME (sym))
  1167.              != SYMBOL_LINKAGE_NAME (sym))
  1168.         {
  1169.           struct bound_minimal_symbol msym;

  1171.           msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym),
  1172.                                         NULL, objfile);
  1173.           if (msym.minsym != NULL)
  1174.             {
  1175.               const char *new_name = gdbarch_static_transform_name
  1176.                 (gdbarch, SYMBOL_LINKAGE_NAME (sym));

  1178.               SYMBOL_SET_LINKAGE_NAME (sym, new_name);
  1179.               SYMBOL_VALUE_ADDRESS (sym) = BMSYMBOL_VALUE_ADDRESS (msym);
  1180.             }
  1181.         }
  1182.       SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
  1183.       add_symbol_to_list (sym, &file_symbols);
  1184.       break;

  1186.     case 't':
  1187.       /* In Ada, there is no distinction between typedef and non-typedef;
  1188.          any type declaration implicitly has the equivalent of a typedef,
  1189.          and thus 't' is in fact equivalent to 'Tt'.

  1191.          Therefore, for Ada units, we check the character immediately
  1192.          before the 't', and if we do not find a 'T', then make sure to
  1193.          create the associated symbol in the STRUCT_DOMAIN ('t' definitions
  1194.          will be stored in the VAR_DOMAIN).  If the symbol was indeed
  1195.          defined as 'Tt' then the STRUCT_DOMAIN symbol will be created
  1196.          elsewhere, so we don't need to take care of that.

  1198.          This is important to do, because of forward references:
  1199.          The cleanup of undefined types stored in undef_types only uses
  1200.          STRUCT_DOMAIN symbols to perform the replacement.  */
  1201.       synonym = (SYMBOL_LANGUAGE (sym) == language_ada && p[-2] != 'T');

  1203.       /* Typedef */
  1204.       SYMBOL_TYPE (sym) = read_type (&p, objfile);

  1206.       /* For a nameless type, we don't want a create a symbol, thus we
  1207.          did not use `sym'.  Return without further processing.  */
  1208.       if (nameless)
  1209.         return NULL;

  1211.       SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
  1212.       SYMBOL_VALUE (sym) = valu;
  1213.       SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
  1214.       /* C++ vagaries: we may have a type which is derived from
  1215.          a base type which did not have its name defined when the
  1216.          derived class was output.  We fill in the derived class's
  1217.          base part member's name here in that case.  */
  1218.       if (TYPE_NAME (SYMBOL_TYPE (sym)) != NULL)
  1219.         if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_STRUCT
  1220.              || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_UNION)
  1221.             && TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)))
  1222.           {
  1223.             int j;

  1225.             for (j = TYPE_N_BASECLASSES (SYMBOL_TYPE (sym)) - 1; j >= 0; j--)
  1226.               if (TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) == 0)
  1227.                 TYPE_BASECLASS_NAME (SYMBOL_TYPE (sym), j) =
  1228.                   type_name_no_tag (TYPE_BASECLASS (SYMBOL_TYPE (sym), j));
  1229.           }

  1231.       if (TYPE_NAME (SYMBOL_TYPE (sym)) == NULL)
  1232.         {
  1233.           /* gcc-2.6 or later (when using -fvtable-thunks)
  1234.              emits a unique named type for a vtable entry.
  1235.              Some gdb code depends on that specific name.  */
  1236.           extern const char vtbl_ptr_name[];

  1238.           if ((TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_PTR
  1239.                && strcmp (SYMBOL_LINKAGE_NAME (sym), vtbl_ptr_name))
  1240.               || TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_FUNC)
  1241.             {
  1242.               /* If we are giving a name to a type such as "pointer to
  1243.                  foo" or "function returning foo", we better not set
  1244.                  the TYPE_NAME.  If the program contains "typedef char
  1245.                  *caddr_t;", we don't want all variables of type char
  1246.                  * to print as caddr_t.  This is not just a
  1247.                  consequence of GDB's type management; PCC and GCC (at
  1248.                  least through version 2.4) both output variables of
  1249.                  either type char * or caddr_t with the type number
  1250.                  defined in the 't' symbol for caddr_t.  If a future
  1251.                  compiler cleans this up it GDB is not ready for it
  1252.                  yet, but if it becomes ready we somehow need to
  1253.                  disable this check (without breaking the PCC/GCC2.4
  1254.                  case).

  1256.                  Sigh.

  1258.                  Fortunately, this check seems not to be necessary
  1259.                  for anything except pointers or functions.  */
  1260.               /* ezannoni: 2000-10-26.  This seems to apply for
  1261.                  versions of gcc older than 2.8.  This was the original
  1262.                  problem: with the following code gdb would tell that
  1263.                  the type for name1 is caddr_t, and func is char().

  1265.                  typedef char *caddr_t;
  1266.                  char *name2;
  1267.                  struct x
  1268.                  {
  1269.                    char *name1;
  1270.                  } xx;
  1271.                  char *func()
  1272.                  {
  1273.                  }
  1274.                  main () {}
  1275.                  */

  1277.               /* Pascal accepts names for pointer types.  */
  1278.               if (current_subfile->language == language_pascal)
  1279.                 {
  1280.                   TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_LINKAGE_NAME (sym);
  1281.                   }
  1282.             }
  1283.           else
  1284.             TYPE_NAME (SYMBOL_TYPE (sym)) = SYMBOL_LINKAGE_NAME (sym);
  1285.         }

  1287.       add_symbol_to_list (sym, &file_symbols);

  1289.       if (synonym)
  1290.         {
  1291.           /* Create the STRUCT_DOMAIN clone.  */
  1292.           struct symbol *struct_sym = allocate_symbol (objfile);

  1294.           *struct_sym = *sym;
  1295.           SYMBOL_ACLASS_INDEX (struct_sym) = LOC_TYPEDEF;
  1296.           SYMBOL_VALUE (struct_sym) = valu;
  1297.           SYMBOL_DOMAIN (struct_sym) = STRUCT_DOMAIN;
  1298.           if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
  1299.             TYPE_NAME (SYMBOL_TYPE (sym))
  1300.               = obconcat (&objfile->objfile_obstack,
  1301.                           SYMBOL_LINKAGE_NAME (sym),
  1302.                           (char *) NULL);
  1303.           add_symbol_to_list (struct_sym, &file_symbols);
  1304.         }

  1306.       break;

  1308.     case 'T':
  1309.       /* Struct, union, or enum tag.  For GNU C++, this can be be followed
  1310.          by 't' which means we are typedef'ing it as well.  */
  1311.       synonym = *p == 't';

  1313.       if (synonym)
  1314.         p++;

  1316.       SYMBOL_TYPE (sym) = read_type (&p, objfile);

  1318.       /* For a nameless type, we don't want a create a symbol, thus we
  1319.          did not use `sym'.  Return without further processing.  */
  1320.       if (nameless)
  1321.         return NULL;

  1323.       SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF;
  1324.       SYMBOL_VALUE (sym) = valu;
  1325.       SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN;
  1326.       if (TYPE_TAG_NAME (SYMBOL_TYPE (sym)) == 0)
  1327.         TYPE_TAG_NAME (SYMBOL_TYPE (sym))
  1328.           = obconcat (&objfile->objfile_obstack,
  1329.                       SYMBOL_LINKAGE_NAME (sym),
  1330.                       (char *) NULL);
  1331.       add_symbol_to_list (sym, &file_symbols);

  1333.       if (synonym)
  1334.         {
  1335.           /* Clone the sym and then modify it.  */
  1336.           struct symbol *typedef_sym = allocate_symbol (objfile);

  1338.           *typedef_sym = *sym;
  1339.           SYMBOL_ACLASS_INDEX (typedef_sym) = LOC_TYPEDEF;
  1340.           SYMBOL_VALUE (typedef_sym) = valu;
  1341.           SYMBOL_DOMAIN (typedef_sym) = VAR_DOMAIN;
  1342.           if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0)
  1343.             TYPE_NAME (SYMBOL_TYPE (sym))
  1344.               = obconcat (&objfile->objfile_obstack,
  1345.                           SYMBOL_LINKAGE_NAME (sym),
  1346.                           (char *) NULL);
  1347.           add_symbol_to_list (typedef_sym, &file_symbols);
  1348.         }
  1349.       break;

  1351.     case 'V':
  1352.       /* Static symbol of local scope.  */
  1353.       SYMBOL_TYPE (sym) = read_type (&p, objfile);
  1354.       SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
  1355.       SYMBOL_VALUE_ADDRESS (sym) = valu;
  1356.       if (gdbarch_static_transform_name_p (gdbarch)
  1357.           && gdbarch_static_transform_name (gdbarch,
  1358.                                             SYMBOL_LINKAGE_NAME (sym))
  1359.              != SYMBOL_LINKAGE_NAME (sym))
  1360.         {
  1361.           struct bound_minimal_symbol msym;

  1363.           msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym),
  1364.                                         NULL, objfile);
  1365.           if (msym.minsym != NULL)
  1366.             {
  1367.               const char *new_name = gdbarch_static_transform_name
  1368.                 (gdbarch, SYMBOL_LINKAGE_NAME (sym));

  1370.               SYMBOL_SET_LINKAGE_NAME (sym, new_name);
  1371.               SYMBOL_VALUE_ADDRESS (sym) = BMSYMBOL_VALUE_ADDRESS (msym);
  1372.             }
  1373.         }
  1374.       SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
  1375.         add_symbol_to_list (sym, &local_symbols);
  1376.       break;

  1378.     case 'v':
  1379.       /* Reference parameter */
  1380.       SYMBOL_TYPE (sym) = read_type (&p, objfile);
  1381.       SYMBOL_ACLASS_INDEX (sym) = LOC_REF_ARG;
  1382.       SYMBOL_IS_ARGUMENT (sym) = 1;
  1383.       SYMBOL_VALUE (sym) = valu;
  1384.       SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
  1385.       add_symbol_to_list (sym, &local_symbols);
  1386.       break;

  1388.     case 'a':
  1389.       /* Reference parameter which is in a register.  */
  1390.       SYMBOL_TYPE (sym) = read_type (&p, objfile);
  1391.       SYMBOL_ACLASS_INDEX (sym) = stab_regparm_index;
  1392.       SYMBOL_IS_ARGUMENT (sym) = 1;
  1393.       SYMBOL_VALUE (sym) = valu;
  1394.       SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
  1395.       add_symbol_to_list (sym, &local_symbols);
  1396.       break;

  1398.     case 'X':
  1399.       /* This is used by Sun FORTRAN for "function result value".
  1400.          Sun claims ("dbx and dbxtool interfaces", 2nd ed)
  1401.          that Pascal uses it too, but when I tried it Pascal used
  1402.          "x:3" (local symbol) instead.  */
  1403.       SYMBOL_TYPE (sym) = read_type (&p, objfile);
  1404.       SYMBOL_ACLASS_INDEX (sym) = LOC_LOCAL;
  1405.       SYMBOL_VALUE (sym) = valu;
  1406.       SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
  1407.       add_symbol_to_list (sym, &local_symbols);
  1408.       break;

  1410.     default:
  1411.       SYMBOL_TYPE (sym) = error_type (&p, objfile);
  1412.       SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
  1413.       SYMBOL_VALUE (sym) = 0;
  1414.       SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
  1415.       add_symbol_to_list (sym, &file_symbols);
  1416.       break;
  1417.     }

  1419.   /* Some systems pass variables of certain types by reference instead
  1420.      of by value, i.e. they will pass the address of a structure (in a
  1421.      register or on the stack) instead of the structure itself.  */

  1423.   if (gdbarch_stabs_argument_has_addr (gdbarch, SYMBOL_TYPE (sym))
  1424.       && SYMBOL_IS_ARGUMENT (sym))
  1425.     {
  1426.       /* We have to convert LOC_REGISTER to LOC_REGPARM_ADDR (for
  1427.          variables passed in a register).  */
  1428.       if (SYMBOL_CLASS (sym) == LOC_REGISTER)
  1429.         SYMBOL_ACLASS_INDEX (sym) = LOC_REGPARM_ADDR;
  1430.       /* Likewise for converting LOC_ARG to LOC_REF_ARG (for the 7th
  1431.          and subsequent arguments on SPARC, for example).  */
  1432.       else if (SYMBOL_CLASS (sym) == LOC_ARG)
  1433.         SYMBOL_ACLASS_INDEX (sym) = LOC_REF_ARG;
  1434.     }

  1436.   return sym;
  1437. }

  1439. /* Skip rest of this symbol and return an error type.

  1441.    General notes on error recovery:  error_type always skips to the
  1442.    end of the symbol (modulo cretinous dbx symbol name continuation).
  1443.    Thus code like this:

  1445.    if (*(*pp)++ != ';')
  1446.    return error_type (pp, objfile);

  1448.    is wrong because if *pp starts out pointing at '\0' (typically as the
  1449.    result of an earlier error), it will be incremented to point to the
  1450.    start of the next symbol, which might produce strange results, at least
  1451.    if you run off the end of the string table.  Instead use

  1453.    if (**pp != ';')
  1454.    return error_type (pp, objfile);
  1455.    ++*pp;

  1457.    or

  1459.    if (**pp != ';')
  1460.    foo = error_type (pp, objfile);
  1461.    else
  1462.    ++*pp;

  1464.    And in case it isn't obvious, the point of all this hair is so the compiler
  1465.    can define new types and new syntaxes, and old versions of the
  1466.    debugger will be able to read the new symbol tables.  */

  1468. static struct type *
  1469. ‌error_type (char **pp, struct objfile *objfile)
  1470. {
  1471.   complaint (&symfile_complaints,
  1472.              _("couldn't parse type; debugger out of date?"));
  1473.   while (1)
  1474.     {
  1475.       /* Skip to end of symbol.  */
  1476.       while (**pp != '\0')
  1477.         {
  1478.           (*pp)++;
  1479.         }

  1481.       /* Check for and handle cretinous dbx symbol name continuation!  */
  1482.       if ((*pp)[-1] == '\\' || (*pp)[-1] == '?')
  1483.         {
  1484.           *pp = next_symbol_text (objfile);
  1485.         }
  1486.       else
  1487.         {
  1488.           break;
  1489.         }
  1490.     }
  1491.   return objfile_type (objfile)->builtin_error;
  1492. }


  1495. /* Read type information or a type definition; return the type.  Even
  1496.    though this routine accepts either type information or a type
  1497.    definition, the distinction is relevant--some parts of stabsread.c
  1498.    assume that type information starts with a digit, '-', or '(' in
  1499.    deciding whether to call read_type.  */

  1501. static struct type *
  1502. ‌read_type (char **pp, struct objfile *objfile)
  1503. {
  1504.   struct type *type = 0;
  1505.   struct type *type1;
  1506.   int typenums[2];
  1507.   char type_descriptor;

  1509.   /* Size in bits of type if specified by a type attribute, or -1 if
  1510.      there is no size attribute.  */
  1511.   int type_size = -1;

  1513.   /* Used to distinguish string and bitstring from char-array and set.  */
  1514.   int is_string = 0;

  1516.   /* Used to distinguish vector from array.  */
  1517.   int is_vector = 0;

  1519.   /* Read type number if present.  The type number may be omitted.
  1520.      for instance in a two-dimensional array declared with type
  1521.      "ar1;1;10;ar1;1;10;4".  */
  1522.   if ((**pp >= '0' && **pp <= '9')
  1523.       || **pp == '('
  1524.       || **pp == '-')
  1525.     {
  1526.       if (read_type_number (pp, typenums) != 0)
  1527.         return error_type (pp, objfile);

  1529.       if (**pp != '=')
  1530.         {
  1531.           /* Type is not being defined here.  Either it already
  1532.              exists, or this is a forward reference to it.
  1533.              dbx_alloc_type handles both cases.  */
  1534.           type = dbx_alloc_type (typenums, objfile);

  1536.           /* If this is a forward reference, arrange to complain if it
  1537.              doesn't get patched up by the time we're done
  1538.              reading.  */
  1539.           if (TYPE_CODE (type) == TYPE_CODE_UNDEF)
  1540.             add_undefined_type (type, typenums);

  1542.           return type;
  1543.         }

  1545.       /* Type is being defined here.  */
  1546.       /* Skip the '='.
  1547.          Also skip the type descriptor - we get it below with (*pp)[-1].  */
  1548.       (*pp) += 2;
  1549.     }
  1550.   else
  1551.     {
  1552.       /* 'typenums=' not present, type is anonymous.  Read and return
  1553.          the definition, but don't put it in the type vector.  */
  1554.       typenums[0] = typenums[1] = -1;
  1555.       (*pp)++;
  1556.     }

  1558. again:
  1559.   type_descriptor = (*pp)[-1];
  1560.   switch (type_descriptor)
  1561.     {
  1562.     case 'x':
  1563.       {
  1564.         enum type_code code;

  1566.         /* Used to index through file_symbols.  */
  1567.         struct pending *ppt;
  1568.         int i;

  1570.         /* Name including "struct", etc.  */
  1571.         char *type_name;

  1573.         {
  1574.           char *from, *to, *p, *q1, *q2;

  1576.           /* Set the type code according to the following letter.  */
  1577.           switch ((*pp)[0])
  1578.             {
  1579.             case 's':
  1580.               code = TYPE_CODE_STRUCT;
  1581.               break;
  1582.             case 'u':
  1583.               code = TYPE_CODE_UNION;
  1584.               break;
  1585.             case 'e':
  1586.               code = TYPE_CODE_ENUM;
  1587.               break;
  1588.             default:
  1589.               {
  1590.                 /* Complain and keep going, so compilers can invent new
  1591.                    cross-reference types.  */
  1592.                 complaint (&symfile_complaints,
  1593.                            _("Unrecognized cross-reference type `%c'"),
  1594.                            (*pp)[0]);
  1595.                 code = TYPE_CODE_STRUCT;
  1596.                 break;
  1597.               }
  1598.             }

  1600.           q1 = strchr (*pp, '<');
  1601.           p = strchr (*pp, ':');
  1602.           if (p == NULL)
  1603.             return error_type (pp, objfile);
  1604.           if (q1 && p > q1 && p[1] == ':')
  1605.             {
  1606.               int nesting_level = 0;

  1608.               for (q2 = q1; *q2; q2++)
  1609.                 {
  1610.                   if (*q2 == '<')
  1611.                     nesting_level++;
  1612.                   else if (*q2 == '>')
  1613.                     nesting_level--;
  1614.                   else if (*q2 == ':' && nesting_level == 0)
  1615.                     break;
  1616.                 }
  1617.               p = q2;
  1618.               if (*p != ':')
  1619.                 return error_type (pp, objfile);
  1620.             }
  1621.           type_name = NULL;
  1622.           if (current_subfile->language == language_cplus)
  1623.             {
  1624.               char *new_name, *name = alloca (p - *pp + 1);

  1626.               memcpy (name, *pp, p - *pp);
  1627.               name[p - *pp] = '\0';
  1628.               new_name = cp_canonicalize_string (name);
  1629.               if (new_name != NULL)
  1630.                 {
  1631.                   type_name = obstack_copy0 (&objfile->objfile_obstack,
  1632.                                              new_name, strlen (new_name));
  1633.                   xfree (new_name);
  1634.                 }
  1635.             }
  1636.           if (type_name == NULL)
  1637.             {
  1638.               to = type_name = (char *)
  1639.                 obstack_alloc (&objfile->objfile_obstack, p - *pp + 1);

  1641.               /* Copy the name.  */
  1642.               from = *pp + 1;
  1643.               while (from < p)
  1644.                 *to++ = *from++;
  1645.               *to = '\0';
  1646.             }

  1648.           /* Set the pointer ahead of the name which we just read, and
  1649.              the colon.  */
  1650.           *pp = p + 1;
  1651.         }

  1653.         /* If this type has already been declared, then reuse the same
  1654.            type, rather than allocating a new one.  This saves some
  1655.            memory.  */

  1657.         for (ppt = file_symbols; ppt; ppt = ppt->next)
  1658.           for (i = 0; i < ppt->nsyms; i++)
  1659.             {
  1660.               struct symbol *sym = ppt->symbol[i];

  1662.               if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
  1663.                   && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
  1664.                   && (TYPE_CODE (SYMBOL_TYPE (sym)) == code)
  1665.                   && strcmp (SYMBOL_LINKAGE_NAME (sym), type_name) == 0)
  1666.                 {
  1667.                   obstack_free (&objfile->objfile_obstack, type_name);
  1668.                   type = SYMBOL_TYPE (sym);
  1669.                   if (typenums[0] != -1)
  1670.                     *dbx_lookup_type (typenums, objfile) = type;
  1671.                   return type;
  1672.                 }
  1673.             }

  1675.         /* Didn't find the type to which this refers, so we must
  1676.            be dealing with a forward reference.  Allocate a type
  1677.            structure for it, and keep track of it so we can
  1678.            fill in the rest of the fields when we get the full
  1679.            type.  */
  1680.         type = dbx_alloc_type (typenums, objfile);
  1681.         TYPE_CODE (type) = code;
  1682.         TYPE_TAG_NAME (type) = type_name;
  1683.         INIT_CPLUS_SPECIFIC (type);
  1684.         TYPE_STUB (type) = 1;

  1686.         add_undefined_type (type, typenums);
  1687.         return type;
  1688.       }

  1690.     case '-':                        /* RS/6000 built-in type */
  1691.     case '0':
  1692.     case '1':
  1693.     case '2':
  1694.     case '3':
  1695.     case '4':
  1696.     case '5':
  1697.     case '6':
  1698.     case '7':
  1699.     case '8':
  1700.     case '9':
  1701.     case '(':
  1702.       (*pp)--;

  1704.       /* We deal with something like t(1,2)=(3,4)=... which
  1705.          the Lucid compiler and recent gcc versions (post 2.7.3) use.  */

  1707.       /* Allocate and enter the typedef type first.
  1708.          This handles recursive types.  */
  1709.       type = dbx_alloc_type (typenums, objfile);
  1710.       TYPE_CODE (type) = TYPE_CODE_TYPEDEF;
  1711.       {
  1712.         struct type *xtype = read_type (pp, objfile);

  1714.         if (type == xtype)
  1715.           {
  1716.             /* It's being defined as itself.  That means it is "void".  */
  1717.             TYPE_CODE (type) = TYPE_CODE_VOID;
  1718.             TYPE_LENGTH (type) = 1;
  1719.           }
  1720.         else if (type_size >= 0 || is_string)
  1721.           {
  1722.             /* This is the absolute wrong way to construct types.  Every
  1723.                other debug format has found a way around this problem and
  1724.                the related problems with unnecessarily stubbed types;
  1725.                someone motivated should attempt to clean up the issue
  1726.                here as well.  Once a type pointed to has been created it
  1727.                should not be modified.

  1729.                Well, it's not *absolutely* wrong.  Constructing recursive
  1730.                types (trees, linked lists) necessarily entails modifying
  1731.                types after creating them.  Constructing any loop structure
  1732.                entails side effects.  The Dwarf 2 reader does handle this
  1733.                more gracefully (it never constructs more than once
  1734.                instance of a type object, so it doesn't have to copy type
  1735.                objects wholesale), but it still mutates type objects after
  1736.                other folks have references to them.

  1738.                Keep in mind that this circularity/mutation issue shows up
  1739.                at the source language level, too: C's "incomplete types",
  1740.                for example.  So the proper cleanup, I think, would be to
  1741.                limit GDB's type smashing to match exactly those required
  1742.                by the source language.  So GDB could have a
  1743.                "complete_this_type" function, but never create unnecessary
  1744.                copies of a type otherwise.  */
  1745.             replace_type (type, xtype);
  1746.             TYPE_NAME (type) = NULL;
  1747.             TYPE_TAG_NAME (type) = NULL;
  1748.           }
  1749.         else
  1750.           {
  1751.             TYPE_TARGET_STUB (type) = 1;
  1752.             TYPE_TARGET_TYPE (type) = xtype;
  1753.           }
  1754.       }
  1755.       break;

  1757.       /* In the following types, we must be sure to overwrite any existing
  1758.          type that the typenums refer to, rather than allocating a new one
  1759.          and making the typenums point to the new one.  This is because there
  1760.          may already be pointers to the existing type (if it had been
  1761.          forward-referenced), and we must change it to a pointer, function,
  1762.          reference, or whatever, *in-place*.  */

  1764.     case '*':                        /* Pointer to another type */
  1765.       type1 = read_type (pp, objfile);
  1766.       type = make_pointer_type (type1, dbx_lookup_type (typenums, objfile));
  1767.       break;

  1769.     case '&':                        /* Reference to another type */
  1770.       type1 = read_type (pp, objfile);
  1771.       type = make_reference_type (type1, dbx_lookup_type (typenums, objfile));
  1772.       break;

  1774.     case 'f':                        /* Function returning another type */
  1775.       type1 = read_type (pp, objfile);
  1776.       type = make_function_type (type1, dbx_lookup_type (typenums, objfile));
  1777.       break;

  1779.     case 'g':                   /* Prototyped function.  (Sun)  */
  1780.       {
  1781.         /* Unresolved questions:

  1783.            - According to Sun's ``STABS Interface Manual'', for 'f'
  1784.            and 'F' symbol descriptors, a `0' in the argument type list
  1785.            indicates a varargs function.  But it doesn't say how 'g'
  1786.            type descriptors represent that info.  Someone with access
  1787.            to Sun's toolchain should try it out.

  1789.            - According to the comment in define_symbol (search for
  1790.            `process_prototype_types:'), Sun emits integer arguments as
  1791.            types which ref themselves --- like `void' types.  Do we
  1792.            have to deal with that here, too?  Again, someone with
  1793.            access to Sun's toolchain should try it out and let us
  1794.            know.  */

  1796.         const char *type_start = (*pp) - 1;
  1797.         struct type *return_type = read_type (pp, objfile);
  1798.         struct type *func_type
  1799.           = make_function_type (return_type,
  1800.                                 dbx_lookup_type (typenums, objfile));
  1801.         struct type_list {
  1802.           struct type *type;
  1803.           struct type_list *next;
  1804.         } *arg_types = 0;
  1805.         int num_args = 0;

  1807.         while (**pp && **pp != '#')
  1808.           {
  1809.             struct type *arg_type = read_type (pp, objfile);
  1810.             struct type_list *new = alloca (sizeof (*new));
  1811.             new->type = arg_type;
  1812.             new->next = arg_types;
  1813.             arg_types = new;
  1814.             num_args++;
  1815.           }
  1816.         if (**pp == '#')
  1817.           ++*pp;
  1818.         else
  1819.           {
  1820.             complaint (&symfile_complaints,
  1821.                        _("Prototyped function type didn't "
  1822.                          "end arguments with `#':\n%s"),
  1823.                        type_start);
  1824.           }

  1826.         /* If there is just one argument whose type is `void', then
  1827.            that's just an empty argument list.  */
  1828.         if (arg_types
  1829.             && ! arg_types->next
  1830.             && TYPE_CODE (arg_types->type) == TYPE_CODE_VOID)
  1831.           num_args = 0;

  1833.         TYPE_FIELDS (func_type)
  1834.           = (struct field *) TYPE_ALLOC (func_type,
  1835.                                          num_args * sizeof (struct field));
  1836.         memset (TYPE_FIELDS (func_type), 0, num_args * sizeof (struct field));
  1837.         {
  1838.           int i;
  1839.           struct type_list *t;

  1841.           /* We stuck each argument type onto the front of the list
  1842.              when we read it, so the list is reversed.  Build the
  1843.              fields array right-to-left.  */
  1844.           for (t = arg_types, i = num_args - 1; t; t = t->next, i--)
  1845.             TYPE_FIELD_TYPE (func_type, i) = t->type;
  1846.         }
  1847.         TYPE_NFIELDS (func_type) = num_args;
  1848.         TYPE_PROTOTYPED (func_type) = 1;

  1850.         type = func_type;
  1851.         break;
  1852.       }

  1854.     case 'k':                        /* Const qualifier on some type (Sun) */
  1855.       type = read_type (pp, objfile);
  1856.       type = make_cv_type (1, TYPE_VOLATILE (type), type,
  1857.                            dbx_lookup_type (typenums, objfile));
  1858.       break;

  1860.     case 'B':                        /* Volatile qual on some type (Sun) */
  1861.       type = read_type (pp, objfile);
  1862.       type = make_cv_type (TYPE_CONST (type), 1, type,
  1863.                            dbx_lookup_type (typenums, objfile));
  1864.       break;

  1866.     case '@':
  1867.       if (isdigit (**pp) || **pp == '(' || **pp == '-')
  1868.         {                        /* Member (class & variable) type */
  1869.           /* FIXME -- we should be doing smash_to_XXX types here.  */

  1871.           struct type *domain = read_type (pp, objfile);
  1872.           struct type *memtype;

  1874.           if (**pp != ',')
  1875.             /* Invalid member type data format.  */
  1876.             return error_type (pp, objfile);
  1877.           ++*pp;

  1879.           memtype = read_type (pp, objfile);
  1880.           type = dbx_alloc_type (typenums, objfile);
  1881.           smash_to_memberptr_type (type, domain, memtype);
  1882.         }
  1883.       else
  1884.         /* type attribute */
  1885.         {
  1886.           char *attr = *pp;

  1888.           /* Skip to the semicolon.  */
  1889.           while (**pp != ';' && **pp != '\0')
  1890.             ++(*pp);
  1891.           if (**pp == '\0')
  1892.             return error_type (pp, objfile);
  1893.           else
  1894.             ++ * pp;                /* Skip the semicolon.  */

  1896.           switch (*attr)
  1897.             {
  1898.             case 's':                /* Size attribute */
  1899.               type_size = atoi (attr + 1);
  1900.               if (type_size <= 0)
  1901.                 type_size = -1;
  1902.               break;

  1904.             case 'S':                /* String attribute */
  1905.               /* FIXME: check to see if following type is array?  */
  1906.               is_string = 1;
  1907.               break;

  1909.             case 'V':                /* Vector attribute */
  1910.               /* FIXME: check to see if following type is array?  */
  1911.               is_vector = 1;
  1912.               break;

  1914.             default:
  1915.               /* Ignore unrecognized type attributes, so future compilers
  1916.                  can invent new ones.  */
  1917.               break;
  1918.             }
  1919.           ++*pp;
  1920.           goto again;
  1921.         }
  1922.       break;

  1924.     case '#':                        /* Method (class & fn) type */
  1925.       if ((*pp)[0] == '#')
  1926.         {
  1927.           /* We'll get the parameter types from the name.  */
  1928.           struct type *return_type;

  1930.           (*pp)++;
  1931.           return_type = read_type (pp, objfile);
  1932.           if (*(*pp)++ != ';')
  1933.             complaint (&symfile_complaints,
  1934.                        _("invalid (minimal) member type "
  1935.                          "data format at symtab pos %d."),
  1936.                        symnum);
  1937.           type = allocate_stub_method (return_type);
  1938.           if (typenums[0] != -1)
  1939.             *dbx_lookup_type (typenums, objfile) = type;
  1940.         }
  1941.       else
  1942.         {
  1943.           struct type *domain = read_type (pp, objfile);
  1944.           struct type *return_type;
  1945.           struct field *args;
  1946.           int nargs, varargs;

  1948.           if (**pp != ',')
  1949.             /* Invalid member type data format.  */
  1950.             return error_type (pp, objfile);
  1951.           else
  1952.             ++(*pp);

  1954.           return_type = read_type (pp, objfile);
  1955.           args = read_args (pp, ';', objfile, &nargs, &varargs);
  1956.           if (args == NULL)
  1957.             return error_type (pp, objfile);
  1958.           type = dbx_alloc_type (typenums, objfile);
  1959.           smash_to_method_type (type, domain, return_type, args,
  1960.                                 nargs, varargs);
  1961.         }
  1962.       break;

  1964.     case 'r':                        /* Range type */
  1965.       type = read_range_type (pp, typenums, type_size, objfile);
  1966.       if (typenums[0] != -1)
  1967.         *dbx_lookup_type (typenums, objfile) = type;
  1968.       break;

  1970.     case 'b':
  1971.         {
  1972.           /* Sun ACC builtin int type */
  1973.           type = read_sun_builtin_type (pp, typenums, objfile);
  1974.           if (typenums[0] != -1)
  1975.             *dbx_lookup_type (typenums, objfile) = type;
  1976.         }
  1977.       break;

  1979.     case 'R':                        /* Sun ACC builtin float type */
  1980.       type = read_sun_floating_type (pp, typenums, objfile);
  1981.       if (typenums[0] != -1)
  1982.         *dbx_lookup_type (typenums, objfile) = type;
  1983.       break;

  1985.     case 'e':                        /* Enumeration type */
  1986.       type = dbx_alloc_type (typenums, objfile);
  1987.       type = read_enum_type (pp, type, objfile);
  1988.       if (typenums[0] != -1)
  1989.         *dbx_lookup_type (typenums, objfile) = type;
  1990.       break;

  1992.     case 's':                        /* Struct type */
  1993.     case 'u':                        /* Union type */
  1994.       {
  1995.         enum type_code type_code = TYPE_CODE_UNDEF;
  1996.         type = dbx_alloc_type (typenums, objfile);
  1997.         switch (type_descriptor)
  1998.           {
  1999.           case 's':
  2000.             type_code = TYPE_CODE_STRUCT;
  2001.             break;
  2002.           case 'u':
  2003.             type_code = TYPE_CODE_UNION;
  2004.             break;
  2005.           }
  2006.         type = read_struct_type (pp, type, type_code, objfile);
  2007.         break;
  2008.       }

  2010.     case 'a':                        /* Array type */
  2011.       if (**pp != 'r')
  2012.         return error_type (pp, objfile);
  2013.       ++*pp;

  2015.       type = dbx_alloc_type (typenums, objfile);
  2016.       type = read_array_type (pp, type, objfile);
  2017.       if (is_string)
  2018.         TYPE_CODE (type) = TYPE_CODE_STRING;
  2019.       if (is_vector)
  2020.         make_vector_type (type);
  2021.       break;

  2023.     case 'S':                        /* Set type */
  2024.       type1 = read_type (pp, objfile);
  2025.       type = create_set_type ((struct type *) NULL, type1);
  2026.       if (typenums[0] != -1)
  2027.         *dbx_lookup_type (typenums, objfile) = type;
  2028.       break;

  2030.     default:
  2031.       --*pp;                        /* Go back to the symbol in error.  */
  2032.       /* Particularly important if it was \0!  */
  2033.       return error_type (pp, objfile);
  2034.     }

  2036.   if (type == 0)
  2037.     {
  2038.       warning (_("GDB internal error, type is NULL in stabsread.c."));
  2039.       return error_type (pp, objfile);
  2040.     }

  2042.   /* Size specified in a type attribute overrides any other size.  */
  2043.   if (type_size != -1)
  2044.     TYPE_LENGTH (type) = (type_size + TARGET_CHAR_BIT - 1) / TARGET_CHAR_BIT;

  2046.   return type;
  2047. }

  2049. /* RS/6000 xlc/dbx combination uses a set of builtin types, starting from -1.
  2050.    Return the proper type node for a given builtin type number.  */

  2052. ‌static const struct objfile_data *rs6000_builtin_type_data;

  2054. static struct type *
  2055. ‌rs6000_builtin_type (int typenum, struct objfile *objfile)
  2056. {
  2057.   struct type **negative_types = objfile_data (objfile,
  2058.                                                rs6000_builtin_type_data);

  2060.   /* We recognize types numbered from -NUMBER_RECOGNIZED to -1.  */
  2061. ‌#define NUMBER_RECOGNIZED 34
  2062.   struct type *rettype = NULL;

  2064.   if (typenum >= 0 || typenum < -NUMBER_RECOGNIZED)
  2065.     {
  2066.       complaint (&symfile_complaints, _("Unknown builtin type %d"), typenum);
  2067.       return objfile_type (objfile)->builtin_error;
  2068.     }

  2070.   if (!negative_types)
  2071.     {
  2072.       /* This includes an empty slot for type number -0.  */
  2073.       negative_types = OBSTACK_CALLOC (&objfile->objfile_obstack,
  2074.                                        NUMBER_RECOGNIZED + 1, struct type *);
  2075.       set_objfile_data (objfile, rs6000_builtin_type_data, negative_types);
  2076.     }

  2078.   if (negative_types[-typenum] != NULL)
  2079.     return negative_types[-typenum];

  2081. #if TARGET_CHAR_BIT != 8
  2082. #error This code wrong for TARGET_CHAR_BIT not 8
  2083.   /* These definitions all assume that TARGET_CHAR_BIT is 8.  I think
  2084.      that if that ever becomes not true, the correct fix will be to
  2085.      make the size in the struct type to be in bits, not in units of
  2086.      TARGET_CHAR_BIT.  */
  2087. #endif

  2089.   switch (-typenum)
  2090.     {
  2091.     case 1:
  2092.       /* The size of this and all the other types are fixed, defined
  2093.          by the debugging format.  If there is a type called "int" which
  2094.          is other than 32 bits, then it should use a new negative type
  2095.          number (or avoid negative type numbers for that case).
  2096.          See stabs.texinfo.  */
  2097.       rettype = init_type (TYPE_CODE_INT, 4, 0, "int", objfile);
  2098.       break;
  2099.     case 2:
  2100.       rettype = init_type (TYPE_CODE_INT, 1, 0, "char", objfile);
  2101.       break;
  2102.     case 3:
  2103.       rettype = init_type (TYPE_CODE_INT, 2, 0, "short", objfile);
  2104.       break;
  2105.     case 4:
  2106.       rettype = init_type (TYPE_CODE_INT, 4, 0, "long", objfile);
  2107.       break;
  2108.     case 5:
  2109.       rettype = init_type (TYPE_CODE_INT, 1, TYPE_FLAG_UNSIGNED,
  2110.                            "unsigned char", objfile);
  2111.       break;
  2112.     case 6:
  2113.       rettype = init_type (TYPE_CODE_INT, 1, 0, "signed char", objfile);
  2114.       break;
  2115.     case 7:
  2116.       rettype = init_type (TYPE_CODE_INT, 2, TYPE_FLAG_UNSIGNED,
  2117.                            "unsigned short", objfile);
  2118.       break;
  2119.     case 8:
  2120.       rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
  2121.                            "unsigned int", objfile);
  2122.       break;
  2123.     case 9:
  2124.       rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
  2125.                            "unsigned", objfile);
  2126.       break;
  2127.     case 10:
  2128.       rettype = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED,
  2129.                            "unsigned long", objfile);
  2130.       break;
  2131.     case 11:
  2132.       rettype = init_type (TYPE_CODE_VOID, 1, 0, "void", objfile);
  2133.       break;
  2134.     case 12:
  2135.       /* IEEE single precision (32 bit).  */
  2136.       rettype = init_type (TYPE_CODE_FLT, 4, 0, "float", objfile);
  2137.       break;
  2138.     case 13:
  2139.       /* IEEE double precision (64 bit).  */
  2140.       rettype = init_type (TYPE_CODE_FLT, 8, 0, "double", objfile);
  2141.       break;
  2142.     case 14:
  2143.       /* This is an IEEE double on the RS/6000, and different machines with
  2144.          different sizes for "long double" should use different negative
  2145.          type numbers.  See stabs.texinfo.  */
  2146.       rettype = init_type (TYPE_CODE_FLT, 8, 0, "long double", objfile);
  2147.       break;
  2148.     case 15:
  2149.       rettype = init_type (TYPE_CODE_INT, 4, 0, "integer", objfile);
  2150.       break;
  2151.     case 16:
  2152.       rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
  2153.                            "boolean", objfile);
  2154.       break;
  2155.     case 17:
  2156.       rettype = init_type (TYPE_CODE_FLT, 4, 0, "short real", objfile);
  2157.       break;
  2158.     case 18:
  2159.       rettype = init_type (TYPE_CODE_FLT, 8, 0, "real", objfile);
  2160.       break;
  2161.     case 19:
  2162.       rettype = init_type (TYPE_CODE_ERROR, 0, 0, "stringptr", objfile);
  2163.       break;
  2164.     case 20:
  2165.       rettype = init_type (TYPE_CODE_CHAR, 1, TYPE_FLAG_UNSIGNED,
  2166.                            "character", objfile);
  2167.       break;
  2168.     case 21:
  2169.       rettype = init_type (TYPE_CODE_BOOL, 1, TYPE_FLAG_UNSIGNED,
  2170.                            "logical*1", objfile);
  2171.       break;
  2172.     case 22:
  2173.       rettype = init_type (TYPE_CODE_BOOL, 2, TYPE_FLAG_UNSIGNED,
  2174.                            "logical*2", objfile);
  2175.       break;
  2176.     case 23:
  2177.       rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
  2178.                            "logical*4", objfile);
  2179.       break;
  2180.     case 24:
  2181.       rettype = init_type (TYPE_CODE_BOOL, 4, TYPE_FLAG_UNSIGNED,
  2182.                            "logical", objfile);
  2183.       break;
  2184.     case 25:
  2185.       /* Complex type consisting of two IEEE single precision values.  */
  2186.       rettype = init_type (TYPE_CODE_COMPLEX, 8, 0, "complex", objfile);
  2187.       TYPE_TARGET_TYPE (rettype) = init_type (TYPE_CODE_FLT, 4, 0, "float",
  2188.                                               objfile);
  2189.       break;
  2190.     case 26:
  2191.       /* Complex type consisting of two IEEE double precision values.  */
  2192.       rettype = init_type (TYPE_CODE_COMPLEX, 16, 0, "double complex", NULL);
  2193.       TYPE_TARGET_TYPE (rettype) = init_type (TYPE_CODE_FLT, 8, 0, "double",
  2194.                                               objfile);
  2195.       break;
  2196.     case 27:
  2197.       rettype = init_type (TYPE_CODE_INT, 1, 0, "integer*1", objfile);
  2198.       break;
  2199.     case 28:
  2200.       rettype = init_type (TYPE_CODE_INT, 2, 0, "integer*2", objfile);
  2201.       break;
  2202.     case 29:
  2203.       rettype = init_type (TYPE_CODE_INT, 4, 0, "integer*4", objfile);
  2204.       break;
  2205.     case 30:
  2206.       rettype = init_type (TYPE_CODE_CHAR, 2, 0, "wchar", objfile);
  2207.       break;
  2208.     case 31:
  2209.       rettype = init_type (TYPE_CODE_INT, 8, 0, "long long", objfile);
  2210.       break;
  2211.     case 32:
  2212.       rettype = init_type (TYPE_CODE_INT, 8, TYPE_FLAG_UNSIGNED,
  2213.                            "unsigned long long", objfile);
  2214.       break;
  2215.     case 33:
  2216.       rettype = init_type (TYPE_CODE_INT, 8, TYPE_FLAG_UNSIGNED,
  2217.                            "logical*8", objfile);
  2218.       break;
  2219.     case 34:
  2220.       rettype = init_type (TYPE_CODE_INT, 8, 0, "integer*8", objfile);
  2221.       break;
  2222.     }
  2223.   negative_types[-typenum] = rettype;
  2224.   return rettype;
  2225. }

  2227. /* This page contains subroutines of read_type.  */

  2229. /* Wrapper around method_name_from_physname to flag a complaint
  2230.    if there is an error.  */

  2232. static char *
  2233. ‌stabs_method_name_from_physname (const char *physname)
  2234. {
  2235.   char *method_name;

  2237.   method_name = method_name_from_physname (physname);

  2239.   if (method_name == NULL)
  2240.     {
  2241.       complaint (&symfile_complaints,
  2242.                  _("Method has bad physname %s\n"), physname);
  2243.       return NULL;
  2244.     }

  2246.   return method_name;
  2247. }

  2249. /* Read member function stabs info for C++ classes.  The form of each member
  2250.    function data is:

  2252.    NAME :: TYPENUM[=type definition] ARGS : PHYSNAME ;

  2254.    An example with two member functions is:

  2256.    afunc1::20=##15;:i;2A.;afunc2::20:i;2A.;

  2258.    For the case of overloaded operators, the format is op$::*.funcs, where
  2259.    $ is the CPLUS_MARKER (usually '$'), `*' holds the place for an operator
  2260.    name (such as `+=') and `.' marks the end of the operator name.

  2262.    Returns 1 for success, 0 for failure.  */

  2264. static int
  2265. ‌read_member_functions (struct field_info *fip, char **pp, struct type *type,
  2266.                        struct objfile *objfile)
  2267. {
  2268.   int nfn_fields = 0;
  2269.   int length = 0;
  2270.   int i;
  2271.   struct next_fnfield
  2272.     {
  2273.       struct next_fnfield *next;
  2274.       struct fn_field fn_field;
  2275.     }
  2276.    *sublist;
  2277.   struct type *look_ahead_type;
  2278.   struct next_fnfieldlist *new_fnlist;
  2279.   struct next_fnfield *new_sublist;
  2280.   char *main_fn_name;
  2281.   char *p;

  2283.   /* Process each list until we find something that is not a member function
  2284.      or find the end of the functions.  */

  2286.   while (**pp != ';')
  2287.     {
  2288.       /* We should be positioned at the start of the function name.
  2289.          Scan forward to find the first ':' and if it is not the
  2290.          first of a "::" delimiter, then this is not a member function.  */
  2291.       p = *pp;
  2292.       while (*p != ':')
  2293.         {
  2294.           p++;
  2295.         }
  2296.       if (p[1] != ':')
  2297.         {
  2298.           break;
  2299.         }

  2301.       sublist = NULL;
  2302.       look_ahead_type = NULL;
  2303.       length = 0;

  2305.       new_fnlist = (struct next_fnfieldlist *)
  2306.         xmalloc (sizeof (struct next_fnfieldlist));
  2307.       make_cleanup (xfree, new_fnlist);
  2308.       memset (new_fnlist, 0, sizeof (struct next_fnfieldlist));

  2310.       if ((*pp)[0] == 'o' && (*pp)[1] == 'p' && is_cplus_marker ((*pp)[2]))
  2311.         {
  2312.           /* This is a completely wierd case.  In order to stuff in the
  2313.              names that might contain colons (the usual name delimiter),
  2314.              Mike Tiemann defined a different name format which is
  2315.              signalled if the identifier is "op$".  In that case, the
  2316.              format is "op$::XXXX." where XXXX is the name.  This is
  2317.              used for names like "+" or "=".  YUUUUUUUK!  FIXME!  */
  2318.           /* This lets the user type "break operator+".
  2319.              We could just put in "+" as the name, but that wouldn't
  2320.              work for "*".  */
  2321.           static char opname[32] = "op$";
  2322.           char *o = opname + 3;

  2324.           /* Skip past '::'.  */
  2325.           *pp = p + 2;

  2327.           STABS_CONTINUE (pp, objfile);
  2328.           p = *pp;
  2329.           while (*p != '.')
  2330.             {
  2331.               *o++ = *p++;
  2332.             }
  2333.           main_fn_name = savestring (opname, o - opname);
  2334.           /* Skip past '.'  */
  2335.           *pp = p + 1;
  2336.         }
  2337.       else
  2338.         {
  2339.           main_fn_name = savestring (*pp, p - *pp);
  2340.           /* Skip past '::'.  */
  2341.           *pp = p + 2;
  2342.         }
  2343.       new_fnlist->fn_fieldlist.name = main_fn_name;

  2345.       do
  2346.         {
  2347.           new_sublist =
  2348.             (struct next_fnfield *) xmalloc (sizeof (struct next_fnfield));
  2349.           make_cleanup (xfree, new_sublist);
  2350.           memset (new_sublist, 0, sizeof (struct next_fnfield));

  2352.           /* Check for and handle cretinous dbx symbol name continuation!  */
  2353.           if (look_ahead_type == NULL)
  2354.             {
  2355.               /* Normal case.  */
  2356.               STABS_CONTINUE (pp, objfile);

  2358.               new_sublist->fn_field.type = read_type (pp, objfile);
  2359.               if (**pp != ':')
  2360.                 {
  2361.                   /* Invalid symtab info for member function.  */
  2362.                   return 0;
  2363.                 }
  2364.             }
  2365.           else
  2366.             {
  2367.               /* g++ version 1 kludge */
  2368.               new_sublist->fn_field.type = look_ahead_type;
  2369.               look_ahead_type = NULL;
  2370.             }

  2372.           (*pp)++;
  2373.           p = *pp;
  2374.           while (*p != ';')
  2375.             {
  2376.               p++;
  2377.             }

  2379.           /* If this is just a stub, then we don't have the real name here.  */

  2381.           if (TYPE_STUB (new_sublist->fn_field.type))
  2382.             {
  2383.               if (!TYPE_DOMAIN_TYPE (new_sublist->fn_field.type))
  2384.                 TYPE_DOMAIN_TYPE (new_sublist->fn_field.type) = type;
  2385.               new_sublist->fn_field.is_stub = 1;
  2386.             }
  2387.           new_sublist->fn_field.physname = savestring (*pp, p - *pp);
  2388.           *pp = p + 1;

  2390.           /* Set this member function's visibility fields.  */
  2391.           switch (*(*pp)++)
  2392.             {
  2393.             case VISIBILITY_PRIVATE:
  2394.               new_sublist->fn_field.is_private = 1;
  2395.               break;
  2396.             case VISIBILITY_PROTECTED:
  2397.               new_sublist->fn_field.is_protected = 1;
  2398.               break;
  2399.             }

  2401.           STABS_CONTINUE (pp, objfile);
  2402.           switch (**pp)
  2403.             {
  2404.             case 'A':                /* Normal functions.  */
  2405.               new_sublist->fn_field.is_const = 0;
  2406.               new_sublist->fn_field.is_volatile = 0;
  2407.               (*pp)++;
  2408.               break;
  2409.             case 'B':                /* `const' member functions.  */
  2410.               new_sublist->fn_field.is_const = 1;
  2411.               new_sublist->fn_field.is_volatile = 0;
  2412.               (*pp)++;
  2413.               break;
  2414.             case 'C':                /* `volatile' member function.  */
  2415.               new_sublist->fn_field.is_const = 0;
  2416.               new_sublist->fn_field.is_volatile = 1;
  2417.               (*pp)++;
  2418.               break;
  2419.             case 'D':                /* `const volatile' member function.  */
  2420.               new_sublist->fn_field.is_const = 1;
  2421.               new_sublist->fn_field.is_volatile = 1;
  2422.               (*pp)++;
  2423.               break;
  2424.             case '*':                /* File compiled with g++ version 1 --
  2425.                                    no info.  */
  2426.             case '?':
  2427.             case '.':
  2428.               break;
  2429.             default:
  2430.               complaint (&symfile_complaints,
  2431.                          _("const/volatile indicator missing, got '%c'"),
  2432.                          **pp);
  2433.               break;
  2434.             }

  2436.           switch (*(*pp)++)
  2437.             {
  2438.             case '*':
  2439.               {
  2440.                 int nbits;
  2441.                 /* virtual member function, followed by index.
  2442.                    The sign bit is set to distinguish pointers-to-methods
  2443.                    from virtual function indicies.  Since the array is
  2444.                    in words, the quantity must be shifted left by 1
  2445.                    on 16 bit machine, and by 2 on 32 bit machine, forcing
  2446.                    the sign bit out, and usable as a valid index into
  2447.                    the array.  Remove the sign bit here.  */
  2448.                 new_sublist->fn_field.voffset =
  2449.                   (0x7fffffff & read_huge_number (pp, ';', &nbits, 0)) + 2;
  2450.                 if (nbits != 0)
  2451.                   return 0;

  2453.                 STABS_CONTINUE (pp, objfile);
  2454.                 if (**pp == ';' || **pp == '\0')
  2455.                   {
  2456.                     /* Must be g++ version 1.  */
  2457.                     new_sublist->fn_field.fcontext = 0;
  2458.                   }
  2459.                 else
  2460.                   {
  2461.                     /* Figure out from whence this virtual function came.
  2462.                        It may belong to virtual function table of
  2463.                        one of its baseclasses.  */
  2464.                     look_ahead_type = read_type (pp, objfile);
  2465.                     if (**pp == ':')
  2466.                       {
  2467.                         /* g++ version 1 overloaded methods.  */
  2468.                       }
  2469.                     else
  2470.                       {
  2471.                         new_sublist->fn_field.fcontext = look_ahead_type;
  2472.                         if (**pp != ';')
  2473.                           {
  2474.                             return 0;
  2475.                           }
  2476.                         else
  2477.                           {
  2478.                             ++*pp;
  2479.                           }
  2480.                         look_ahead_type = NULL;
  2481.                       }
  2482.                   }
  2483.                 break;
  2484.               }
  2485.             case '?':
  2486.               /* static member function.  */
  2487.               {
  2488.                 int slen = strlen (main_fn_name);

  2490.                 new_sublist->fn_field.voffset = VOFFSET_STATIC;

  2492.                 /* For static member functions, we can't tell if they
  2493.                    are stubbed, as they are put out as functions, and not as
  2494.                    methods.
  2495.                    GCC v2 emits the fully mangled name if
  2496.                    dbxout.c:flag_minimal_debug is not set, so we have to
  2497.                    detect a fully mangled physname here and set is_stub
  2498.                    accordingly.  Fully mangled physnames in v2 start with
  2499.                    the member function name, followed by two underscores.
  2500.                    GCC v3 currently always emits stubbed member functions,
  2501.                    but with fully mangled physnames, which start with _Z.  */
  2502.                 if (!(strncmp (new_sublist->fn_field.physname,
  2503.                                main_fn_name, slen) == 0
  2504.                       && new_sublist->fn_field.physname[slen] == '_'
  2505.                       && new_sublist->fn_field.physname[slen + 1] == '_'))
  2506.                   {
  2507.                     new_sublist->fn_field.is_stub = 1;
  2508.                   }
  2509.                 break;
  2510.               }

  2512.             default:
  2513.               /* error */
  2514.               complaint (&symfile_complaints,
  2515.                          _("member function type missing, got '%c'"),
  2516.                          (*pp)[-1]);
  2517.               /* Fall through into normal member function.  */

  2519.             case '.':
  2520.               /* normal member function.  */
  2521.               new_sublist->fn_field.voffset = 0;
  2522.               new_sublist->fn_field.fcontext = 0;
  2523.               break;
  2524.             }

  2526.           new_sublist->next = sublist;
  2527.           sublist = new_sublist;
  2528.           length++;
  2529.           STABS_CONTINUE (pp, objfile);
  2530.         }
  2531.       while (**pp != ';' && **pp != '\0');

  2533.       (*pp)++;
  2534.       STABS_CONTINUE (pp, objfile);

  2536.       /* Skip GCC 3.X member functions which are duplicates of the callable
  2537.          constructor/destructor.  */
  2538.       if (strcmp_iw (main_fn_name, "__base_ctor ") == 0
  2539.           || strcmp_iw (main_fn_name, "__base_dtor ") == 0
  2540.           || strcmp (main_fn_name, "__deleting_dtor") == 0)
  2541.         {
  2542.           xfree (main_fn_name);
  2543.         }
  2544.       else
  2545.         {
  2546.           int has_stub = 0;
  2547.           int has_destructor = 0, has_other = 0;
  2548.           int is_v3 = 0;
  2549.           struct next_fnfield *tmp_sublist;

  2551.           /* Various versions of GCC emit various mostly-useless
  2552.              strings in the name field for special member functions.

  2554.              For stub methods, we need to defer correcting the name
  2555.              until we are ready to unstub the method, because the current
  2556.              name string is used by gdb_mangle_name.  The only stub methods
  2557.              of concern here are GNU v2 operators; other methods have their
  2558.              names correct (see caveat below).

  2560.              For non-stub methods, in GNU v3, we have a complete physname.
  2561.              Therefore we can safely correct the name now.  This primarily
  2562.              affects constructors and destructors, whose name will be
  2563.              __comp_ctor or __comp_dtor instead of Foo or ~Foo.  Cast
  2564.              operators will also have incorrect names; for instance,
  2565.              "operator int" will be named "operator i" (i.e. the type is
  2566.              mangled).

  2568.              For non-stub methods in GNU v2, we have no easy way to
  2569.              know if we have a complete physname or not.  For most
  2570.              methods the result depends on the platform (if CPLUS_MARKER
  2571.              can be `$' or `.', it will use minimal debug information, or
  2572.              otherwise the full physname will be included).

  2574.              Rather than dealing with this, we take a different approach.
  2575.              For v3 mangled names, we can use the full physname; for v2,
  2576.              we use cplus_demangle_opname (which is actually v2 specific),
  2577.              because the only interesting names are all operators - once again
  2578.              barring the caveat below.  Skip this process if any method in the
  2579.              group is a stub, to prevent our fouling up the workings of
  2580.              gdb_mangle_name.

  2582.              The caveat: GCC 2.95.x (and earlier?) put constructors and
  2583.              destructors in the same method group.  We need to split this
  2584.              into two groups, because they should have different names.
  2585.              So for each method group we check whether it contains both
  2586.              routines whose physname appears to be a destructor (the physnames
  2587.              for and destructors are always provided, due to quirks in v2
  2588.              mangling) and routines whose physname does not appear to be a
  2589.              destructor.  If so then we break up the list into two halves.
  2590.              Even if the constructors and destructors aren't in the same group
  2591.              the destructor will still lack the leading tilde, so that also
  2592.              needs to be fixed.

  2594.              So, to summarize what we expect and handle here:

  2596.                 Given         Given          Real         Real       Action
  2597.              method name     physname      physname   method name

  2599.              __opi            [none]     __opi__3Foo  operator int    opname
  2600.                                                                  [now or later]
  2601.              Foo              _._3Foo       _._3Foo      ~Foo      separate and
  2602.                                                                        rename
  2603.              operator i     _ZN3FoocviEv _ZN3FoocviEv operator int    demangle
  2604.              __comp_ctor  _ZN3FooC1ERKS_ _ZN3FooC1ERKS_   Foo         demangle
  2605.           */

  2607.           tmp_sublist = sublist;
  2608.           while (tmp_sublist != NULL)
  2609.             {
  2610.               if (tmp_sublist->fn_field.is_stub)
  2611.                 has_stub = 1;
  2612.               if (tmp_sublist->fn_field.physname[0] == '_'
  2613.                   && tmp_sublist->fn_field.physname[1] == 'Z')
  2614.                 is_v3 = 1;

  2616.               if (is_destructor_name (tmp_sublist->fn_field.physname))
  2617.                 has_destructor++;
  2618.               else
  2619.                 has_other++;

  2621.               tmp_sublist = tmp_sublist->next;
  2622.             }

  2624.           if (has_destructor && has_other)
  2625.             {
  2626.               struct next_fnfieldlist *destr_fnlist;
  2627.               struct next_fnfield *last_sublist;

  2629.               /* Create a new fn_fieldlist for the destructors.  */

  2631.               destr_fnlist = (struct next_fnfieldlist *)
  2632.                 xmalloc (sizeof (struct next_fnfieldlist));
  2633.               make_cleanup (xfree, destr_fnlist);
  2634.               memset (destr_fnlist, 0, sizeof (struct next_fnfieldlist));
  2635.               destr_fnlist->fn_fieldlist.name
  2636.                 = obconcat (&objfile->objfile_obstack, "~",
  2637.                             new_fnlist->fn_fieldlist.name, (char *) NULL);

  2639.               destr_fnlist->fn_fieldlist.fn_fields = (struct fn_field *)
  2640.                 obstack_alloc (&objfile->objfile_obstack,
  2641.                                sizeof (struct fn_field) * has_destructor);
  2642.               memset (destr_fnlist->fn_fieldlist.fn_fields, 0,
  2643.                   sizeof (struct fn_field) * has_destructor);
  2644.               tmp_sublist = sublist;
  2645.               last_sublist = NULL;
  2646.               i = 0;
  2647.               while (tmp_sublist != NULL)
  2648.                 {
  2649.                   if (!is_destructor_name (tmp_sublist->fn_field.physname))
  2650.                     {
  2651.                       tmp_sublist = tmp_sublist->next;
  2652.                       continue;
  2653.                     }

  2655.                   destr_fnlist->fn_fieldlist.fn_fields[i++]
  2656.                     = tmp_sublist->fn_field;
  2657.                   if (last_sublist)
  2658.                     last_sublist->next = tmp_sublist->next;
  2659.                   else
  2660.                     sublist = tmp_sublist->next;
  2661.                   last_sublist = tmp_sublist;
  2662.                   tmp_sublist = tmp_sublist->next;
  2663.                 }

  2665.               destr_fnlist->fn_fieldlist.length = has_destructor;
  2666.               destr_fnlist->next = fip->fnlist;
  2667.               fip->fnlist = destr_fnlist;
  2668.               nfn_fields++;
  2669.               length -= has_destructor;
  2670.             }
  2671.           else if (is_v3)
  2672.             {
  2673.               /* v3 mangling prevents the use of abbreviated physnames,
  2674.                  so we can do this here.  There are stubbed methods in v3
  2675.                  only:
  2676.                  - in -gstabs instead of -gstabs+
  2677.                  - or for static methods, which are output as a function type
  2678.                    instead of a method type.  */
  2679.               char *new_method_name =
  2680.                 stabs_method_name_from_physname (sublist->fn_field.physname);

  2682.               if (new_method_name != NULL
  2683.                   && strcmp (new_method_name,
  2684.                              new_fnlist->fn_fieldlist.name) != 0)
  2685.                 {
  2686.                   new_fnlist->fn_fieldlist.name = new_method_name;
  2687.                   xfree (main_fn_name);
  2688.                 }
  2689.               else
  2690.                 xfree (new_method_name);
  2691.             }
  2692.           else if (has_destructor && new_fnlist->fn_fieldlist.name[0] != '~')
  2693.             {
  2694.               new_fnlist->fn_fieldlist.name =
  2695.                 obconcat (&objfile->objfile_obstack,
  2696.                           "~", main_fn_name, (char *)NULL);
  2697.               xfree (main_fn_name);
  2698.             }
  2699.           else if (!has_stub)
  2700.             {
  2701.               char dem_opname[256];
  2702.               int ret;

  2704.               ret = cplus_demangle_opname (new_fnlist->fn_fieldlist.name,
  2705.                                               dem_opname, DMGL_ANSI);
  2706.               if (!ret)
  2707.                 ret = cplus_demangle_opname (new_fnlist->fn_fieldlist.name,
  2708.                                              dem_opname, 0);
  2709.               if (ret)
  2710.                 new_fnlist->fn_fieldlist.name
  2711.                   = obstack_copy0 (&objfile->objfile_obstack,
  2712.                                    dem_opname, strlen (dem_opname));
  2713.               xfree (main_fn_name);
  2714.             }

  2716.           new_fnlist->fn_fieldlist.fn_fields = (struct fn_field *)
  2717.             obstack_alloc (&objfile->objfile_obstack,
  2718.                            sizeof (struct fn_field) * length);
  2719.           memset (new_fnlist->fn_fieldlist.fn_fields, 0,
  2720.                   sizeof (struct fn_field) * length);
  2721.           for (i = length; (i--, sublist); sublist = sublist->next)
  2722.             {
  2723.               new_fnlist->fn_fieldlist.fn_fields[i] = sublist->fn_field;
  2724.             }

  2726.           new_fnlist->fn_fieldlist.length = length;
  2727.           new_fnlist->next = fip->fnlist;
  2728.           fip->fnlist = new_fnlist;
  2729.           nfn_fields++;
  2730.         }
  2731.     }

  2733.   if (nfn_fields)
  2734.     {
  2735.       ALLOCATE_CPLUS_STRUCT_TYPE (type);
  2736.       TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *)
  2737.         TYPE_ALLOC (type, sizeof (struct fn_fieldlist) * nfn_fields);
  2738.       memset (TYPE_FN_FIELDLISTS (type), 0,
  2739.               sizeof (struct fn_fieldlist) * nfn_fields);
  2740.       TYPE_NFN_FIELDS (type) = nfn_fields;
  2741.     }

  2743.   return 1;
  2744. }

  2746. /* Special GNU C++ name.

  2748.    Returns 1 for success, 0 for failure.  "failure" means that we can't
  2749.    keep parsing and it's time for error_type().  */

  2751. static int
  2752. ‌read_cpp_abbrev (struct field_info *fip, char **pp, struct type *type,
  2753.                  struct objfile *objfile)
  2754. {
  2755.   char *p;
  2756.   const char *name;
  2757.   char cpp_abbrev;
  2758.   struct type *context;

  2760.   p = *pp;
  2761.   if (*++p == 'v')
  2762.     {
  2763.       name = NULL;
  2764.       cpp_abbrev = *++p;

  2766.       *pp = p + 1;

  2768.       /* At this point, *pp points to something like "22:23=*22...",
  2769.          where the type number before the ':' is the "context" and
  2770.          everything after is a regular type definition.  Lookup the
  2771.          type, find it's name, and construct the field name.  */

  2773.       context = read_type (pp, objfile);

  2775.       switch (cpp_abbrev)
  2776.         {
  2777.         case 'f':                /* $vf -- a virtual function table pointer */
  2778.           name = type_name_no_tag (context);
  2779.           if (name == NULL)
  2780.             {
  2781.               name = "";
  2782.             }
  2783.           fip->list->field.name = obconcat (&objfile->objfile_obstack,
  2784.                                             vptr_name, name, (char *) NULL);
  2785.           break;

  2787.         case 'b':                /* $vb -- a virtual bsomethingorother */
  2788.           name = type_name_no_tag (context);
  2789.           if (name == NULL)
  2790.             {
  2791.               complaint (&symfile_complaints,
  2792.                          _("C++ abbreviated type name "
  2793.                            "unknown at symtab pos %d"),
  2794.                          symnum);
  2795.               name = "FOO";
  2796.             }
  2797.           fip->list->field.name = obconcat (&objfile->objfile_obstack, vb_name,
  2798.                                             name, (char *) NULL);
  2799.           break;

  2801.         default:
  2802.           invalid_cpp_abbrev_complaint (*pp);
  2803.           fip->list->field.name = obconcat (&objfile->objfile_obstack,
  2804.                                             "INVALID_CPLUSPLUS_ABBREV",
  2805.                                             (char *) NULL);
  2806.           break;
  2807.         }

  2809.       /* At this point, *pp points to the ':'.  Skip it and read the
  2810.          field type.  */

  2812.       p = ++(*pp);
  2813.       if (p[-1] != ':')
  2814.         {
  2815.           invalid_cpp_abbrev_complaint (*pp);
  2816.           return 0;
  2817.         }
  2818.       fip->list->field.type = read_type (pp, objfile);
  2819.       if (**pp == ',')
  2820.         (*pp)++;                /* Skip the comma.  */
  2821.       else
  2822.         return 0;

  2824.       {
  2825.         int nbits;

  2827.         SET_FIELD_BITPOS (fip->list->field,
  2828.                           read_huge_number (pp, ';', &nbits, 0));
  2829.         if (nbits != 0)
  2830.           return 0;
  2831.       }
  2832.       /* This field is unpacked.  */
  2833.       FIELD_BITSIZE (fip->list->field) = 0;
  2834.       fip->list->visibility = VISIBILITY_PRIVATE;
  2835.     }
  2836.   else
  2837.     {
  2838.       invalid_cpp_abbrev_complaint (*pp);
  2839.       /* We have no idea what syntax an unrecognized abbrev would have, so
  2840.          better return 0.  If we returned 1, we would need to at least advance
  2841.          *pp to avoid an infinite loop.  */
  2842.       return 0;
  2843.     }
  2844.   return 1;
  2845. }

  2847. static void
  2848. ‌read_one_struct_field (struct field_info *fip, char **pp, char *p,
  2849.                        struct type *type, struct objfile *objfile)
  2850. {
  2851.   struct gdbarch *gdbarch = get_objfile_arch (objfile);

  2853.   fip->list->field.name =
  2854.     obstack_copy0 (&objfile->objfile_obstack, *pp, p - *pp);
  2855.   *pp = p + 1;

  2857.   /* This means we have a visibility for a field coming.  */
  2858.   if (**pp == '/')
  2859.     {
  2860.       (*pp)++;
  2861.       fip->list->visibility = *(*pp)++;
  2862.     }
  2863.   else
  2864.     {
  2865.       /* normal dbx-style format, no explicit visibility */
  2866.       fip->list->visibility = VISIBILITY_PUBLIC;
  2867.     }

  2869.   fip->list->field.type = read_type (pp, objfile);
  2870.   if (**pp == ':')
  2871.     {
  2872.       p = ++(*pp);
  2873. #if 0
  2874.       /* Possible future hook for nested types.  */
  2875.       if (**pp == '!')
  2876.         {
  2877.           fip->list->field.bitpos = (long) -2;        /* nested type */
  2878.           p = ++(*pp);
  2879.         }
  2880.       else
  2881.         ...;
  2882. #endif
  2883.       while (*p != ';')
  2884.         {
  2885.           p++;
  2886.         }
  2887.       /* Static class member.  */
  2888.       SET_FIELD_PHYSNAME (fip->list->field, savestring (*pp, p - *pp));
  2889.       *pp = p + 1;
  2890.       return;
  2891.     }
  2892.   else if (**pp != ',')
  2893.     {
  2894.       /* Bad structure-type format.  */
  2895.       stabs_general_complaint ("bad structure-type format");
  2896.       return;
  2897.     }

  2899.   (*pp)++;                        /* Skip the comma.  */

  2901.   {
  2902.     int nbits;

  2904.     SET_FIELD_BITPOS (fip->list->field,
  2905.                       read_huge_number (pp, ',', &nbits, 0));
  2906.     if (nbits != 0)
  2907.       {
  2908.         stabs_general_complaint ("bad structure-type format");
  2909.         return;
  2910.       }
  2911.     FIELD_BITSIZE (fip->list->field) = read_huge_number (pp, ';', &nbits, 0);
  2912.     if (nbits != 0)
  2913.       {
  2914.         stabs_general_complaint ("bad structure-type format");
  2915.         return;
  2916.       }
  2917.   }

  2919.   if (FIELD_BITPOS (fip->list->field) == 0
  2920.       && FIELD_BITSIZE (fip->list->field) == 0)
  2921.     {
  2922.       /* This can happen in two cases: (1) at least for gcc 2.4.5 or so,
  2923.          it is a field which has been optimized out.  The correct stab for
  2924.          this case is to use VISIBILITY_IGNORE, but that is a recent
  2925.          invention.  (2) It is a 0-size array.  For example
  2926.          union { int num; char str[0]; } foo.  Printing _("<no value>" for
  2927.          str in "p foo" is OK, since foo.str (and thus foo.str[3])
  2928.          will continue to work, and a 0-size array as a whole doesn't
  2929.          have any contents to print.

  2931.          I suspect this probably could also happen with gcc -gstabs (not
  2932.          -gstabs+) for static fields, and perhaps other C++ extensions.
  2933.          Hopefully few people use -gstabs with gdb, since it is intended
  2934.          for dbx compatibility.  */

  2936.       /* Ignore this field.  */
  2937.       fip->list->visibility = VISIBILITY_IGNORE;
  2938.     }
  2939.   else
  2940.     {
  2941.       /* Detect an unpacked field and mark it as such.
  2942.          dbx gives a bit size for all fields.
  2943.          Note that forward refs cannot be packed,
  2944.          and treat enums as if they had the width of ints.  */

  2946.       struct type *field_type = check_typedef (FIELD_TYPE (fip->list->field));

  2948.       if (TYPE_CODE (field_type) != TYPE_CODE_INT
  2949.           && TYPE_CODE (field_type) != TYPE_CODE_RANGE
  2950.           && TYPE_CODE (field_type) != TYPE_CODE_BOOL
  2951.           && TYPE_CODE (field_type) != TYPE_CODE_ENUM)
  2952.         {
  2953.           FIELD_BITSIZE (fip->list->field) = 0;
  2954.         }
  2955.       if ((FIELD_BITSIZE (fip->list->field)
  2956.            == TARGET_CHAR_BIT * TYPE_LENGTH (field_type)
  2957.            || (TYPE_CODE (field_type) == TYPE_CODE_ENUM
  2958.                && FIELD_BITSIZE (fip->list->field)
  2959.                   == gdbarch_int_bit (gdbarch))
  2960.           )
  2961.           &&
  2962.           FIELD_BITPOS (fip->list->field) % 8 == 0)
  2963.         {
  2964.           FIELD_BITSIZE (fip->list->field) = 0;
  2965.         }
  2966.     }
  2967. }


  2970. /* Read struct or class data fields.  They have the form:

  2972.    NAME : [VISIBILITY] TYPENUM , BITPOS , BITSIZE ;

  2974.    At the end, we see a semicolon instead of a field.

  2976.    In C++, this may wind up being NAME:?TYPENUM:PHYSNAME; for
  2977.    a static field.

  2979.    The optional VISIBILITY is one of:

  2981.    '/0' (VISIBILITY_PRIVATE)
  2982.    '/1' (VISIBILITY_PROTECTED)
  2983.    '/2' (VISIBILITY_PUBLIC)
  2984.    '/9' (VISIBILITY_IGNORE)

  2986.    or nothing, for C style fields with public visibility.

  2988.    Returns 1 for success, 0 for failure.  */

  2990. static int
  2991. ‌read_struct_fields (struct field_info *fip, char **pp, struct type *type,
  2992.                     struct objfile *objfile)
  2993. {
  2994.   char *p;
  2995.   struct nextfield *new;

  2997.   /* We better set p right now, in case there are no fields at all...    */

  2999.   p = *pp;

  3001.   /* Read each data member type until we find the terminating ';' at the end of
  3002.      the data member list, or break for some other reason such as finding the
  3003.      start of the member function list.  */
  3004.   /* Stab string for structure/union does not end with two ';' in
  3005.      SUN C compiler 5.3 i.e. F6U2, hence check for end of string.  */

  3007.   while (**pp != ';' && **pp != '\0')
  3008.     {
  3009.       STABS_CONTINUE (pp, objfile);
  3010.       /* Get space to record the next field's data.  */
  3011.       new = (struct nextfield *) xmalloc (sizeof (struct nextfield));
  3012.       make_cleanup (xfree, new);
  3013.       memset (new, 0, sizeof (struct nextfield));
  3014.       new->next = fip->list;
  3015.       fip->list = new;

  3017.       /* Get the field name.  */
  3018.       p = *pp;

  3020.       /* If is starts with CPLUS_MARKER it is a special abbreviation,
  3021.          unless the CPLUS_MARKER is followed by an underscore, in
  3022.          which case it is just the name of an anonymous type, which we
  3023.          should handle like any other type name.  */

  3025.       if (is_cplus_marker (p[0]) && p[1] != '_')
  3026.         {
  3027.           if (!read_cpp_abbrev (fip, pp, type, objfile))
  3028.             return 0;
  3029.           continue;
  3030.         }

  3032.       /* Look for the ':' that separates the field name from the field
  3033.          values.  Data members are delimited by a single ':', while member
  3034.          functions are delimited by a pair of ':'s.  When we hit the member
  3035.          functions (if any), terminate scan loop and return.  */

  3037.       while (*p != ':' && *p != '\0')
  3038.         {
  3039.           p++;
  3040.         }
  3041.       if (*p == '\0')
  3042.         return 0;

  3044.       /* Check to see if we have hit the member functions yet.  */
  3045.       if (p[1] == ':')
  3046.         {
  3047.           break;
  3048.         }
  3049.       read_one_struct_field (fip, pp, p, type, objfile);
  3050.     }
  3051.   if (p[0] == ':' && p[1] == ':')
  3052.     {
  3053.       /* (the deleted) chill the list of fields: the last entry (at
  3054.          the head) is a partially constructed entry which we now
  3055.          scrub.  */
  3056.       fip->list = fip->list->next;
  3057.     }
  3058.   return 1;
  3059. }
  3060. /* *INDENT-OFF* */
  3061. /* The stabs for C++ derived classes contain baseclass information which
  3062.    is marked by a '!' character after the total size.  This function is
  3063.    called when we encounter the baseclass marker, and slurps up all the
  3064.    baseclass information.

  3066.    Immediately following the '!' marker is the number of base classes that
  3067.    the class is derived from, followed by information for each base class.
  3068.    For each base class, there are two visibility specifiers, a bit offset
  3069.    to the base class information within the derived class, a reference to
  3070.    the type for the base class, and a terminating semicolon.

  3072.    A typical example, with two base classes, would be "!2,020,19;0264,21;".
  3073.                                                           ^^ ^ ^ ^  ^ ^  ^
  3074.         Baseclass information marker __________________|| | | |  | |  |
  3075.         Number of baseclasses __________________________| | | |  | |  |
  3076.         Visibility specifiers (2) ________________________| | |  | |  |
  3077.         Offset in bits from start of class _________________| |  | |  |
  3078.         Type number for base class ___________________________|  | |  |
  3079.         Visibility specifiers (2) _______________________________| |  |
  3080.         Offset in bits from start of class ________________________|  |
  3081.         Type number of base class ____________________________________|

  3083.   Return 1 for success, 0 for (error-type-inducing) failure.  */
  3084. /* *INDENT-ON* */



  3088. static int
  3089. ‌read_baseclasses (struct field_info *fip, char **pp, struct type *type,
  3090.                   struct objfile *objfile)
  3091. {
  3092.   int i;
  3093.   struct nextfield *new;

  3095.   if (**pp != '!')
  3096.     {
  3097.       return 1;
  3098.     }
  3099.   else
  3100.     {
  3101.       /* Skip the '!' baseclass information marker.  */
  3102.       (*pp)++;
  3103.     }

  3105.   ALLOCATE_CPLUS_STRUCT_TYPE (type);
  3106.   {
  3107.     int nbits;

  3109.     TYPE_N_BASECLASSES (type) = read_huge_number (pp, ',', &nbits, 0);
  3110.     if (nbits != 0)
  3111.       return 0;
  3112.   }

  3114. #if 0
  3115.   /* Some stupid compilers have trouble with the following, so break
  3116.      it up into simpler expressions.  */
  3117.   TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *)
  3118.     TYPE_ALLOC (type, B_BYTES (TYPE_N_BASECLASSES (type)));
  3119. #else
  3120.   {
  3121.     int num_bytes = B_BYTES (TYPE_N_BASECLASSES (type));
  3122.     char *pointer;

  3124.     pointer = (char *) TYPE_ALLOC (type, num_bytes);
  3125.     TYPE_FIELD_VIRTUAL_BITS (type) = (B_TYPE *) pointer;
  3126.   }
  3127. #endif /* 0 */

  3129.   B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), TYPE_N_BASECLASSES (type));

  3131.   for (i = 0; i < TYPE_N_BASECLASSES (type); i++)
  3132.     {
  3133.       new = (struct nextfield *) xmalloc (sizeof (struct nextfield));
  3134.       make_cleanup (xfree, new);
  3135.       memset (new, 0, sizeof (struct nextfield));
  3136.       new->next = fip->list;
  3137.       fip->list = new;
  3138.       FIELD_BITSIZE (new->field) = 0;        /* This should be an unpacked
  3139.                                            field!  */

  3141.       STABS_CONTINUE (pp, objfile);
  3142.       switch (**pp)
  3143.         {
  3144.         case '0':
  3145.           /* Nothing to do.  */
  3146.           break;
  3147.         case '1':
  3148.           SET_TYPE_FIELD_VIRTUAL (type, i);
  3149.           break;
  3150.         default:
  3151.           /* Unknown character.  Complain and treat it as non-virtual.  */
  3152.           {
  3153.             complaint (&symfile_complaints,
  3154.                        _("Unknown virtual character `%c' for baseclass"),
  3155.                        **pp);
  3156.           }
  3157.         }
  3158.       ++(*pp);

  3160.       new->visibility = *(*pp)++;
  3161.       switch (new->visibility)
  3162.         {
  3163.         case VISIBILITY_PRIVATE:
  3164.         case VISIBILITY_PROTECTED:
  3165.         case VISIBILITY_PUBLIC:
  3166.           break;
  3167.         default:
  3168.           /* Bad visibility format.  Complain and treat it as
  3169.              public.  */
  3170.           {
  3171.             complaint (&symfile_complaints,
  3172.                        _("Unknown visibility `%c' for baseclass"),
  3173.                        new->visibility);
  3174.             new->visibility = VISIBILITY_PUBLIC;
  3175.           }
  3176.         }

  3178.       {
  3179.         int nbits;

  3181.         /* The remaining value is the bit offset of the portion of the object
  3182.            corresponding to this baseclass.  Always zero in the absence of
  3183.            multiple inheritance.  */

  3185.         SET_FIELD_BITPOS (new->field, read_huge_number (pp, ',', &nbits, 0));
  3186.         if (nbits != 0)
  3187.           return 0;
  3188.       }

  3190.       /* The last piece of baseclass information is the type of the
  3191.          base class.  Read it, and remember it's type name as this
  3192.          field's name.  */

  3194.       new->field.type = read_type (pp, objfile);
  3195.       new->field.name = type_name_no_tag (new->field.type);

  3197.       /* Skip trailing ';' and bump count of number of fields seen.  */
  3198.       if (**pp == ';')
  3199.         (*pp)++;
  3200.       else
  3201.         return 0;
  3202.     }
  3203.   return 1;
  3204. }

  3206. /* The tail end of stabs for C++ classes that contain a virtual function
  3207.    pointer contains a tilde, a %, and a type number.
  3208.    The type number refers to the base class (possibly this class itself) which
  3209.    contains the vtable pointer for the current class.

  3211.    This function is called when we have parsed all the method declarations,
  3212.    so we can look for the vptr base class info.  */

  3214. static int
  3215. ‌read_tilde_fields (struct field_info *fip, char **pp, struct type *type,
  3216.                    struct objfile *objfile)
  3217. {
  3218.   char *p;

  3220.   STABS_CONTINUE (pp, objfile);

  3222.   /* If we are positioned at a ';', then skip it.  */
  3223.   if (**pp == ';')
  3224.     {
  3225.       (*pp)++;
  3226.     }

  3228.   if (**pp == '~')
  3229.     {
  3230.       (*pp)++;

  3232.       if (**pp == '=' || **pp == '+' || **pp == '-')
  3233.         {
  3234.           /* Obsolete flags that used to indicate the presence
  3235.              of constructors and/or destructors.  */
  3236.           (*pp)++;
  3237.         }

  3239.       /* Read either a '%' or the final ';'.  */
  3240.       if (*(*pp)++ == '%')
  3241.         {
  3242.           /* The next number is the type number of the base class
  3243.              (possibly our own class) which supplies the vtable for
  3244.              this class.  Parse it out, and search that class to find
  3245.              its vtable pointer, and install those into TYPE_VPTR_BASETYPE
  3246.              and TYPE_VPTR_FIELDNO.  */

  3248.           struct type *t;
  3249.           int i;

  3251.           t = read_type (pp, objfile);
  3252.           p = (*pp)++;
  3253.           while (*p != '\0' && *p != ';')
  3254.             {
  3255.               p++;
  3256.             }
  3257.           if (*p == '\0')
  3258.             {
  3259.               /* Premature end of symbol.  */
  3260.               return 0;
  3261.             }

  3263.           TYPE_VPTR_BASETYPE (type) = t;
  3264.           if (type == t)        /* Our own class provides vtbl ptr.  */
  3265.             {
  3266.               for (i = TYPE_NFIELDS (t) - 1;
  3267.                    i >= TYPE_N_BASECLASSES (t);
  3268.                    --i)
  3269.                 {
  3270.                   const char *name = TYPE_FIELD_NAME (t, i);

  3272.                   if (!strncmp (name, vptr_name, sizeof (vptr_name) - 2)
  3273.                       && is_cplus_marker (name[sizeof (vptr_name) - 2]))
  3274.                     {
  3275.                       TYPE_VPTR_FIELDNO (type) = i;
  3276.                       goto gotit;
  3277.                     }
  3278.                 }
  3279.               /* Virtual function table field not found.  */
  3280.               complaint (&symfile_complaints,
  3281.                          _("virtual function table pointer "
  3282.                            "not found when defining class `%s'"),
  3283.                          TYPE_NAME (type));
  3284.               return 0;
  3285.             }
  3286.           else
  3287.             {
  3288.               TYPE_VPTR_FIELDNO (type) = TYPE_VPTR_FIELDNO (t);
  3289.             }

  3291.         gotit:
  3292.           *pp = p + 1;
  3293.         }
  3294.     }
  3295.   return 1;
  3296. }

  3298. static int
  3299. ‌attach_fn_fields_to_type (struct field_info *fip, struct type *type)
  3300. {
  3301.   int n;

  3303.   for (n = TYPE_NFN_FIELDS (type);
  3304.        fip->fnlist != NULL;
  3305.        fip->fnlist = fip->fnlist->next)
  3306.     {
  3307.       --n;                        /* Circumvent Sun3 compiler bug.  */
  3308.       TYPE_FN_FIELDLISTS (type)[n] = fip->fnlist->fn_fieldlist;
  3309.     }
  3310.   return 1;
  3311. }

  3313. /* Create the vector of fields, and record how big it is.
  3314.    We need this info to record proper virtual function table information
  3315.    for this class's virtual functions.  */

  3317. static int
  3318. ‌attach_fields_to_type (struct field_info *fip, struct type *type,
  3319.                        struct objfile *objfile)
  3320. {
  3321.   int nfields = 0;
  3322.   int non_public_fields = 0;
  3323.   struct nextfield *scan;

  3325.   /* Count up the number of fields that we have, as well as taking note of
  3326.      whether or not there are any non-public fields, which requires us to
  3327.      allocate and build the private_field_bits and protected_field_bits
  3328.      bitfields.  */

  3330.   for (scan = fip->list; scan != NULL; scan = scan->next)
  3331.     {
  3332.       nfields++;
  3333.       if (scan->visibility != VISIBILITY_PUBLIC)
  3334.         {
  3335.           non_public_fields++;
  3336.         }
  3337.     }

  3339.   /* Now we know how many fields there are, and whether or not there are any
  3340.      non-public fields.  Record the field count, allocate space for the
  3341.      array of fields, and create blank visibility bitfields if necessary.  */

  3343.   TYPE_NFIELDS (type) = nfields;
  3344.   TYPE_FIELDS (type) = (struct field *)
  3345.     TYPE_ALLOC (type, sizeof (struct field) * nfields);
  3346.   memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nfields);

  3348.   if (non_public_fields)
  3349.     {
  3350.       ALLOCATE_CPLUS_STRUCT_TYPE (type);

  3352.       TYPE_FIELD_PRIVATE_BITS (type) =
  3353.         (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
  3354.       B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields);

  3356.       TYPE_FIELD_PROTECTED_BITS (type) =
  3357.         (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
  3358.       B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields);

  3360.       TYPE_FIELD_IGNORE_BITS (type) =
  3361.         (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields));
  3362.       B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields);
  3363.     }

  3365.   /* Copy the saved-up fields into the field vector.  Start from the
  3366.      head of the list, adding to the tail of the field array, so that
  3367.      they end up in the same order in the array in which they were
  3368.      added to the list.  */

  3370.   while (nfields-- > 0)
  3371.     {
  3372.       TYPE_FIELD (type, nfields) = fip->list->field;
  3373.       switch (fip->list->visibility)
  3374.         {
  3375.         case VISIBILITY_PRIVATE:
  3376.           SET_TYPE_FIELD_PRIVATE (type, nfields);
  3377.           break;

  3379.         case VISIBILITY_PROTECTED:
  3380.           SET_TYPE_FIELD_PROTECTED (type, nfields);
  3381.           break;

  3383.         case VISIBILITY_IGNORE:
  3384.           SET_TYPE_FIELD_IGNORE (type, nfields);
  3385.           break;

  3387.         case VISIBILITY_PUBLIC:
  3388.           break;

  3390.         default:
  3391.           /* Unknown visibility.  Complain and treat it as public.  */
  3392.           {
  3393.             complaint (&symfile_complaints,
  3394.                        _("Unknown visibility `%c' for field"),
  3395.                        fip->list->visibility);
  3396.           }
  3397.           break;
  3398.         }
  3399.       fip->list = fip->list->next;
  3400.     }
  3401.   return 1;
  3402. }


  3405. /* Complain that the compiler has emitted more than one definition for the
  3406.    structure type TYPE.  */
  3407. static void
  3408. ‌complain_about_struct_wipeout (struct type *type)
  3409. {
  3410.   const char *name = "";
  3411.   const char *kind = "";

  3413.   if (TYPE_TAG_NAME (type))
  3414.     {
  3415.       name = TYPE_TAG_NAME (type);
  3416.       switch (TYPE_CODE (type))
  3417.         {
  3418.         case TYPE_CODE_STRUCT: kind = "struct "; break;
  3419.         case TYPE_CODE_UNION:  kind = "union ";  break;
  3420.         case TYPE_CODE_ENUM:   kind = "enum ";   break;
  3421.         default: kind = "";
  3422.         }
  3423.     }
  3424.   else if (TYPE_NAME (type))
  3425.     {
  3426.       name = TYPE_NAME (type);
  3427.       kind = "";
  3428.     }
  3429.   else
  3430.     {
  3431.       name = "<unknown>";
  3432.       kind = "";
  3433.     }

  3435.   complaint (&symfile_complaints,
  3436.              _("struct/union type gets multiply defined: %s%s"), kind, name);
  3437. }

  3439. /* Set the length for all variants of a same main_type, which are
  3440.    connected in the closed chain.

  3442.    This is something that needs to be done when a type is defined *after*
  3443.    some cross references to this type have already been read.  Consider
  3444.    for instance the following scenario where we have the following two
  3445.    stabs entries:

  3447.         .stabs  "t:p(0,21)=*(0,22)=k(0,23)=xsdummy:",160,0,28,-24
  3448.         .stabs  "dummy:T(0,23)=s16x:(0,1),0,3[...]"

  3450.    A stubbed version of type dummy is created while processing the first
  3451.    stabs entry.  The length of that type is initially set to zero, since
  3452.    it is unknown at this point.  Also, a "constant" variation of type
  3453.    "dummy" is created as well (this is the "(0,22)=k(0,23)" section of
  3454.    the stabs line).

  3456.    The second stabs entry allows us to replace the stubbed definition
  3457.    with the real definition.  However, we still need to adjust the length
  3458.    of the "constant" variation of that type, as its length was left
  3459.    untouched during the main type replacement...  */

  3461. static void
  3462. ‌set_length_in_type_chain (struct type *type)
  3463. {
  3464.   struct type *ntype = TYPE_CHAIN (type);

  3466.   while (ntype != type)
  3467.     {
  3468.       if (TYPE_LENGTH(ntype) == 0)
  3469.         TYPE_LENGTH (ntype) = TYPE_LENGTH (type);
  3470.       else
  3471.         complain_about_struct_wipeout (ntype);
  3472.       ntype = TYPE_CHAIN (ntype);
  3473.     }
  3474. }

  3476. /* Read the description of a structure (or union type) and return an object
  3477.    describing the type.

  3479.    PP points to a character pointer that points to the next unconsumed token
  3480.    in the stabs string.  For example, given stabs "A:T4=s4a:1,0,32;;",
  3481.    *PP will point to "4a:1,0,32;;".

  3483.    TYPE points to an incomplete type that needs to be filled in.

  3485.    OBJFILE points to the current objfile from which the stabs information is
  3486.    being read.  (Note that it is redundant in that TYPE also contains a pointer
  3487.    to this same objfile, so it might be a good idea to eliminate it.  FIXME).
  3488. */

  3490. static struct type *
  3491. ‌read_struct_type (char **pp, struct type *type, enum type_code type_code,
  3492.                   struct objfile *objfile)
  3493. {
  3494.   struct cleanup *back_to;
  3495.   struct field_info fi;

  3497.   fi.list = NULL;
  3498.   fi.fnlist = NULL;

  3500.   /* When describing struct/union/class types in stabs, G++ always drops
  3501.      all qualifications from the name.  So if you've got:
  3502.        struct A { ... struct B { ... }; ... };
  3503.      then G++ will emit stabs for `struct A::B' that call it simply
  3504.      `struct B'.  Obviously, if you've got a real top-level definition for
  3505.      `struct B', or other nested definitions, this is going to cause
  3506.      problems.

  3508.      Obviously, GDB can't fix this by itself, but it can at least avoid
  3509.      scribbling on existing structure type objects when new definitions
  3510.      appear.  */
  3511.   if (! (TYPE_CODE (type) == TYPE_CODE_UNDEF
  3512.          || TYPE_STUB (type)))
  3513.     {
  3514.       complain_about_struct_wipeout (type);

  3516.       /* It's probably best to return the type unchanged.  */
  3517.       return type;
  3518.     }

  3520.   back_to = make_cleanup (null_cleanup, 0);

  3522.   INIT_CPLUS_SPECIFIC (type);
  3523.   TYPE_CODE (type) = type_code;
  3524.   TYPE_STUB (type) = 0;

  3526.   /* First comes the total size in bytes.  */

  3528.   {
  3529.     int nbits;

  3531.     TYPE_LENGTH (type) = read_huge_number (pp, 0, &nbits, 0);
  3532.     if (nbits != 0)
  3533.       {
  3534.         do_cleanups (back_to);
  3535.         return error_type (pp, objfile);
  3536.       }
  3537.     set_length_in_type_chain (type);
  3538.   }

  3540.   /* Now read the baseclasses, if any, read the regular C struct or C++
  3541.      class member fields, attach the fields to the type, read the C++
  3542.      member functions, attach them to the type, and then read any tilde
  3543.      field (baseclass specifier for the class holding the main vtable).  */

  3545.   if (!read_baseclasses (&fi, pp, type, objfile)
  3546.       || !read_struct_fields (&fi, pp, type, objfile)
  3547.       || !attach_fields_to_type (&fi, type, objfile)
  3548.       || !read_member_functions (&fi, pp, type, objfile)
  3549.       || !attach_fn_fields_to_type (&fi, type)
  3550.       || !read_tilde_fields (&fi, pp, type, objfile))
  3551.     {
  3552.       type = error_type (pp, objfile);
  3553.     }

  3555.   do_cleanups (back_to);
  3556.   return (type);
  3557. }

  3559. /* Read a definition of an array type,
  3560.    and create and return a suitable type object.
  3561.    Also creates a range type which represents the bounds of that
  3562.    array.  */

  3564. static struct type *
  3565. ‌read_array_type (char **pp, struct type *type,
  3566.                  struct objfile *objfile)
  3567. {
  3568.   struct type *index_type, *element_type, *range_type;
  3569.   int lower, upper;
  3570.   int adjustable = 0;
  3571.   int nbits;

  3573.   /* Format of an array type:
  3574.      "ar<index type>;lower;upper;<array_contents_type>".
  3575.      OS9000: "arlower,upper;<array_contents_type>".

  3577.      Fortran adjustable arrays use Adigits or Tdigits for lower or upper;
  3578.      for these, produce a type like float[][].  */

  3580.     {
  3581.       index_type = read_type (pp, objfile);
  3582.       if (**pp != ';')
  3583.         /* Improper format of array type decl.  */
  3584.         return error_type (pp, objfile);
  3585.       ++*pp;
  3586.     }

  3588.   if (!(**pp >= '0' && **pp <= '9') && **pp != '-')
  3589.     {
  3590.       (*pp)++;
  3591.       adjustable = 1;
  3592.     }
  3593.   lower = read_huge_number (pp, ';', &nbits, 0);

  3595.   if (nbits != 0)
  3596.     return error_type (pp, objfile);

  3598.   if (!(**pp >= '0' && **pp <= '9') && **pp != '-')
  3599.     {
  3600.       (*pp)++;
  3601.       adjustable = 1;
  3602.     }
  3603.   upper = read_huge_number (pp, ';', &nbits, 0);
  3604.   if (nbits != 0)
  3605.     return error_type (pp, objfile);

  3607.   element_type = read_type (pp, objfile);

  3609.   if (adjustable)
  3610.     {
  3611.       lower = 0;
  3612.       upper = -1;
  3613.     }

  3615.   range_type =
  3616.     create_static_range_type ((struct type *) NULL, index_type, lower, upper);
  3617.   type = create_array_type (type, element_type, range_type);

  3619.   return type;
  3620. }


  3623. /* Read a definition of an enumeration type,
  3624.    and create and return a suitable type object.
  3625.    Also defines the symbols that represent the values of the type.  */

  3627. static struct type *
  3628. ‌read_enum_type (char **pp, struct type *type,
  3629.                 struct objfile *objfile)
  3630. {
  3631.   struct gdbarch *gdbarch = get_objfile_arch (objfile);
  3632.   char *p;
  3633.   char *name;
  3634.   long n;
  3635.   struct symbol *sym;
  3636.   int nsyms = 0;
  3637.   struct pending **symlist;
  3638.   struct pending *osyms, *syms;
  3639.   int o_nsyms;
  3640.   int nbits;
  3641.   int unsigned_enum = 1;

  3643. #if 0
  3644.   /* FIXME!  The stabs produced by Sun CC merrily define things that ought
  3645.      to be file-scope, between N_FN entries, using N_LSYM.  What's a mother
  3646.      to do?  For now, force all enum values to file scope.  */
  3647.   if (within_function)
  3648.     symlist = &local_symbols;
  3649.   else
  3650. #endif
  3651.     symlist = &file_symbols;
  3652.   osyms = *symlist;
  3653.   o_nsyms = osyms ? osyms->nsyms : 0;

  3655.   /* The aix4 compiler emits an extra field before the enum members;
  3656.      my guess is it's a type of some sort.  Just ignore it.  */
  3657.   if (**pp == '-')
  3658.     {
  3659.       /* Skip over the type.  */
  3660.       while (**pp != ':')
  3661.         (*pp)++;

  3663.       /* Skip over the colon.  */
  3664.       (*pp)++;
  3665.     }

  3667.   /* Read the value-names and their values.
  3668.      The input syntax is NAME:VALUE,NAME:VALUE, and so on.
  3669.      A semicolon or comma instead of a NAME means the end.  */
  3670.   while (**pp && **pp != ';' && **pp != ',')
  3671.     {
  3672.       STABS_CONTINUE (pp, objfile);
  3673.       p = *pp;
  3674.       while (*p != ':')
  3675.         p++;
  3676.       name = obstack_copy0 (&objfile->objfile_obstack, *pp, p - *pp);
  3677.       *pp = p + 1;
  3678.       n = read_huge_number (pp, ',', &nbits, 0);
  3679.       if (nbits != 0)
  3680.         return error_type (pp, objfile);

  3682.       sym = allocate_symbol (objfile);
  3683.       SYMBOL_SET_LINKAGE_NAME (sym, name);
  3684.       SYMBOL_SET_LANGUAGE (sym, current_subfile->language,
  3685.                            &objfile->objfile_obstack);
  3686.       SYMBOL_ACLASS_INDEX (sym) = LOC_CONST;
  3687.       SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
  3688.       SYMBOL_VALUE (sym) = n;
  3689.       if (n < 0)
  3690.         unsigned_enum = 0;
  3691.       add_symbol_to_list (sym, symlist);
  3692.       nsyms++;
  3693.     }

  3695.   if (**pp == ';')
  3696.     (*pp)++;                        /* Skip the semicolon.  */

  3698.   /* Now fill in the fields of the type-structure.  */

  3700.   TYPE_LENGTH (type) = gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT;
  3701.   set_length_in_type_chain (type);
  3702.   TYPE_CODE (type) = TYPE_CODE_ENUM;
  3703.   TYPE_STUB (type) = 0;
  3704.   if (unsigned_enum)
  3705.     TYPE_UNSIGNED (type) = 1;
  3706.   TYPE_NFIELDS (type) = nsyms;
  3707.   TYPE_FIELDS (type) = (struct field *)
  3708.     TYPE_ALLOC (type, sizeof (struct field) * nsyms);
  3709.   memset (TYPE_FIELDS (type), 0, sizeof (struct field) * nsyms);

  3711.   /* Find the symbols for the values and put them into the type.
  3712.      The symbols can be found in the symlist that we put them on
  3713.      to cause them to be defined.  osyms contains the old value
  3714.      of that symlist; everything up to there was defined by us.  */
  3715.   /* Note that we preserve the order of the enum constants, so
  3716.      that in something like "enum {FOO, LAST_THING=FOO}" we print
  3717.      FOO, not LAST_THING.  */

  3719.   for (syms = *symlist, n = nsyms - 1; syms; syms = syms->next)
  3720.     {
  3721.       int last = syms == osyms ? o_nsyms : 0;
  3722.       int j = syms->nsyms;

  3724.       for (; --j >= last; --n)
  3725.         {
  3726.           struct symbol *xsym = syms->symbol[j];

  3728.           SYMBOL_TYPE (xsym) = type;
  3729.           TYPE_FIELD_NAME (type, n) = SYMBOL_LINKAGE_NAME (xsym);
  3730.           SET_FIELD_ENUMVAL (TYPE_FIELD (type, n), SYMBOL_VALUE (xsym));
  3731.           TYPE_FIELD_BITSIZE (type, n) = 0;
  3732.         }
  3733.       if (syms == osyms)
  3734.         break;
  3735.     }

  3737.   return type;
  3738. }

  3740. /* Sun's ACC uses a somewhat saner method for specifying the builtin
  3741.    typedefs in every file (for int, long, etc):

  3743.    type = b <signed> <width> <format type>; <offset>; <nbits>
  3744.    signed = u or s.
  3745.    optional format type = c or b for char or boolean.
  3746.    offset = offset from high order bit to start bit of type.
  3747.    width is # bytes in object of this type, nbits is # bits in type.

  3749.    The width/offset stuff appears to be for small objects stored in
  3750.    larger ones (e.g. `shorts' in `int' registers).  We ignore it for now,
  3751.    FIXME.  */

  3753. static struct type *
  3754. ‌read_sun_builtin_type (char **pp, int typenums[2], struct objfile *objfile)
  3755. {
  3756.   int type_bits;
  3757.   int nbits;
  3758.   int signed_type;
  3759.   enum type_code code = TYPE_CODE_INT;

  3761.   switch (**pp)
  3762.     {
  3763.     case 's':
  3764.       signed_type = 1;
  3765.       break;
  3766.     case 'u':
  3767.       signed_type = 0;
  3768.       break;
  3769.     default:
  3770.       return error_type (pp, objfile);
  3771.     }
  3772.   (*pp)++;

  3774.   /* For some odd reason, all forms of char put a c here.  This is strange
  3775.      because no other type has this honor.  We can safely ignore this because
  3776.      we actually determine 'char'acterness by the number of bits specified in
  3777.      the descriptor.
  3778.      Boolean forms, e.g Fortran logical*X, put a b here.  */

  3780.   if (**pp == 'c')
  3781.     (*pp)++;
  3782.   else if (**pp == 'b')
  3783.     {
  3784.       code = TYPE_CODE_BOOL;
  3785.       (*pp)++;
  3786.     }

  3788.   /* The first number appears to be the number of bytes occupied
  3789.      by this type, except that unsigned short is 4 instead of 2.
  3790.      Since this information is redundant with the third number,
  3791.      we will ignore it.  */
  3792.   read_huge_number (pp, ';', &nbits, 0);
  3793.   if (nbits != 0)
  3794.     return error_type (pp, objfile);

  3796.   /* The second number is always 0, so ignore it too.  */
  3797.   read_huge_number (pp, ';', &nbits, 0);
  3798.   if (nbits != 0)
  3799.     return error_type (pp, objfile);

  3801.   /* The third number is the number of bits for this type.  */
  3802.   type_bits = read_huge_number (pp, 0, &nbits, 0);
  3803.   if (nbits != 0)
  3804.     return error_type (pp, objfile);
  3805.   /* The type *should* end with a semicolon.  If it are embedded
  3806.      in a larger type the semicolon may be the only way to know where
  3807.      the type ends.  If this type is at the end of the stabstring we
  3808.      can deal with the omitted semicolon (but we don't have to like
  3809.      it).  Don't bother to complain(), Sun's compiler omits the semicolon
  3810.      for "void".  */
  3811.   if (**pp == ';')
  3812.     ++(*pp);

  3814.   if (type_bits == 0)
  3815.     return init_type (TYPE_CODE_VOID, 1,
  3816.                       signed_type ? 0 : TYPE_FLAG_UNSIGNED, (char *) NULL,
  3817.                       objfile);
  3818.   else
  3819.     return init_type (code,
  3820.                       type_bits / TARGET_CHAR_BIT,
  3821.                       signed_type ? 0 : TYPE_FLAG_UNSIGNED, (char *) NULL,
  3822.                       objfile);
  3823. }

  3825. static struct type *
  3826. ‌read_sun_floating_type (char **pp, int typenums[2], struct objfile *objfile)
  3827. {
  3828.   int nbits;
  3829.   int details;
  3830.   int nbytes;
  3831.   struct type *rettype;

  3833.   /* The first number has more details about the type, for example
  3834.      FN_COMPLEX.  */
  3835.   details = read_huge_number (pp, ';', &nbits, 0);
  3836.   if (nbits != 0)
  3837.     return error_type (pp, objfile);

  3839.   /* The second number is the number of bytes occupied by this type.  */
  3840.   nbytes = read_huge_number (pp, ';', &nbits, 0);
  3841.   if (nbits != 0)
  3842.     return error_type (pp, objfile);

  3844.   if (details == NF_COMPLEX || details == NF_COMPLEX16
  3845.       || details == NF_COMPLEX32)
  3846.     {
  3847.       rettype = init_type (TYPE_CODE_COMPLEX, nbytes, 0, NULL, objfile);
  3848.       TYPE_TARGET_TYPE (rettype)
  3849.         = init_type (TYPE_CODE_FLT, nbytes / 2, 0, NULL, objfile);
  3850.       return rettype;
  3851.     }

  3853.   return init_type (TYPE_CODE_FLT, nbytes, 0, NULL, objfile);
  3854. }

  3856. /* Read a number from the string pointed to by *PP.
  3857.    The value of *PP is advanced over the number.
  3858.    If END is nonzero, the character that ends the
  3859.    number must match END, or an error happens;
  3860.    and that character is skipped if it does match.
  3861.    If END is zero, *PP is left pointing to that character.

  3863.    If TWOS_COMPLEMENT_BITS is set to a strictly positive value and if
  3864.    the number is represented in an octal representation, assume that
  3865.    it is represented in a 2's complement representation with a size of
  3866.    TWOS_COMPLEMENT_BITS.

  3868.    If the number fits in a long, set *BITS to 0 and return the value.
  3869.    If not, set *BITS to be the number of bits in the number and return 0.

  3871.    If encounter garbage, set *BITS to -1 and return 0.  */

  3873. static long
  3874. ‌read_huge_number (char **pp, int end, int *bits, int twos_complement_bits)
  3875. {
  3876.   char *p = *pp;
  3877.   int sign = 1;
  3878.   int sign_bit = 0;
  3879.   long n = 0;
  3880.   int radix = 10;
  3881.   char overflow = 0;
  3882.   int nbits = 0;
  3883.   int c;
  3884.   long upper_limit;
  3885.   int twos_complement_representation = 0;

  3887.   if (*p == '-')
  3888.     {
  3889.       sign = -1;
  3890.       p++;
  3891.     }

  3893.   /* Leading zero means octal.  GCC uses this to output values larger
  3894.      than an int (because that would be hard in decimal).  */
  3895.   if (*p == '0')
  3896.     {
  3897.       radix = 8;
  3898.       p++;
  3899.     }

  3901.   /* Skip extra zeros.  */
  3902.   while (*p == '0')
  3903.     p++;

  3905.   if (sign > 0 && radix == 8 && twos_complement_bits > 0)
  3906.     {
  3907.       /* Octal, possibly signed.  Check if we have enough chars for a
  3908.          negative number.  */

  3910.       size_t len;
  3911.       char *p1 = p;

  3913.       while ((c = *p1) >= '0' && c < '8')
  3914.         p1++;

  3916.       len = p1 - p;
  3917.       if (len > twos_complement_bits / 3
  3918.           || (twos_complement_bits % 3 == 0
  3919.               && len == twos_complement_bits / 3))
  3920.         {
  3921.           /* Ok, we have enough characters for a signed value, check
  3922.              for signness by testing if the sign bit is set.  */
  3923.           sign_bit = (twos_complement_bits % 3 + 2) % 3;
  3924.           c = *p - '0';
  3925.           if (c & (1 << sign_bit))
  3926.             {
  3927.               /* Definitely signed.  */
  3928.               twos_complement_representation = 1;
  3929.               sign = -1;
  3930.             }
  3931.         }
  3932.     }

  3934.   upper_limit = LONG_MAX / radix;

  3936.   while ((c = *p++) >= '0' && c < ('0' + radix))
  3937.     {
  3938.       if (n <= upper_limit)
  3939.         {
  3940.           if (twos_complement_representation)
  3941.             {
  3942.               /* Octal, signed, twos complement representation.  In
  3943.                  this case, n is the corresponding absolute value.  */
  3944.               if (n == 0)
  3945.                 {
  3946.                   long sn = c - '0' - ((2 * (c - '0')) | (2 << sign_bit));

  3948.                   n = -sn;
  3949.                 }
  3950.               else
  3951.                 {
  3952.                   n *= radix;
  3953.                   n -= c - '0';
  3954.                 }
  3955.             }
  3956.           else
  3957.             {
  3958.               /* unsigned representation */
  3959.               n *= radix;
  3960.               n += c - '0';                /* FIXME this overflows anyway.  */
  3961.             }
  3962.         }
  3963.       else
  3964.         overflow = 1;

  3966.       /* This depends on large values being output in octal, which is
  3967.          what GCC does.  */
  3968.       if (radix == 8)
  3969.         {
  3970.           if (nbits == 0)
  3971.             {
  3972.               if (c == '0')
  3973.                 /* Ignore leading zeroes.  */
  3974.                 ;
  3975.               else if (c == '1')
  3976.                 nbits = 1;
  3977.               else if (c == '2' || c == '3')
  3978.                 nbits = 2;
  3979.               else
  3980.                 nbits = 3;
  3981.             }
  3982.           else
  3983.             nbits += 3;
  3984.         }
  3985.     }
  3986.   if (end)
  3987.     {
  3988.       if (c && c != end)
  3989.         {
  3990.           if (bits != NULL)
  3991.             *bits = -1;
  3992.           return 0;
  3993.         }
  3994.     }
  3995.   else
  3996.     --p;

  3998.   if (radix == 8 && twos_complement_bits > 0 && nbits > twos_complement_bits)
  3999.     {
  4000.       /* We were supposed to parse a number with maximum
  4001.          TWOS_COMPLEMENT_BITS bits, but something went wrong.  */
  4002.       if (bits != NULL)
  4003.         *bits = -1;
  4004.       return 0;
  4005.     }

  4007.   *pp = p;
  4008.   if (overflow)
  4009.     {
  4010.       if (nbits == 0)
  4011.         {
  4012.           /* Large decimal constants are an error (because it is hard to
  4013.              count how many bits are in them).  */
  4014.           if (bits != NULL)
  4015.             *bits = -1;
  4016.           return 0;
  4017.         }

  4019.       /* -0x7f is the same as 0x80.  So deal with it by adding one to
  4020.          the number of bits.  Two's complement represention octals
  4021.          can't have a '-' in front.  */
  4022.       if (sign == -1 && !twos_complement_representation)
  4023.         ++nbits;
  4024.       if (bits)
  4025.         *bits = nbits;
  4026.     }
  4027.   else
  4028.     {
  4029.       if (bits)
  4030.         *bits = 0;
  4031.       return n * sign;
  4032.     }
  4033.   /* It's *BITS which has the interesting information.  */
  4034.   return 0;
  4035. }

  4037. static struct type *
  4038. ‌read_range_type (char **pp, int typenums[2], int type_size,
  4039.                  struct objfile *objfile)
  4040. {
  4041.   struct gdbarch *gdbarch = get_objfile_arch (objfile);
  4042.   char *orig_pp = *pp;
  4043.   int rangenums[2];
  4044.   long n2, n3;
  4045.   int n2bits, n3bits;
  4046.   int self_subrange;
  4047.   struct type *result_type;
  4048.   struct type *index_type = NULL;

  4050.   /* First comes a type we are a subrange of.
  4051.      In C it is usually 0, 1 or the type being defined.  */
  4052.   if (read_type_number (pp, rangenums) != 0)
  4053.     return error_type (pp, objfile);
  4054.   self_subrange = (rangenums[0] == typenums[0] &&
  4055.                    rangenums[1] == typenums[1]);

  4057.   if (**pp == '=')
  4058.     {
  4059.       *pp = orig_pp;
  4060.       index_type = read_type (pp, objfile);
  4061.     }

  4063.   /* A semicolon should now follow; skip it.  */
  4064.   if (**pp == ';')
  4065.     (*pp)++;

  4067.   /* The remaining two operands are usually lower and upper bounds
  4068.      of the range.  But in some special cases they mean something else.  */
  4069.   n2 = read_huge_number (pp, ';', &n2bits, type_size);
  4070.   n3 = read_huge_number (pp, ';', &n3bits, type_size);

  4072.   if (n2bits == -1 || n3bits == -1)
  4073.     return error_type (pp, objfile);

  4075.   if (index_type)
  4076.     goto handle_true_range;

  4078.   /* If limits are huge, must be large integral type.  */
  4079.   if (n2bits != 0 || n3bits != 0)
  4080.     {
  4081.       char got_signed = 0;
  4082.       char got_unsigned = 0;
  4083.       /* Number of bits in the type.  */
  4084.       int nbits = 0;

  4086.       /* If a type size attribute has been specified, the bounds of
  4087.          the range should fit in this size.  If the lower bounds needs
  4088.          more bits than the upper bound, then the type is signed.  */
  4089.       if (n2bits <= type_size && n3bits <= type_size)
  4090.         {
  4091.           if (n2bits == type_size && n2bits > n3bits)
  4092.             got_signed = 1;
  4093.           else
  4094.             got_unsigned = 1;
  4095.           nbits = type_size;
  4096.         }
  4097.       /* Range from 0 to <large number> is an unsigned large integral type.  */
  4098.       else if ((n2bits == 0 && n2 == 0) && n3bits != 0)
  4099.         {
  4100.           got_unsigned = 1;
  4101.           nbits = n3bits;
  4102.         }
  4103.       /* Range from <large number> to <large number>-1 is a large signed
  4104.          integral type.  Take care of the case where <large number> doesn't
  4105.          fit in a long but <large number>-1 does.  */
  4106.       else if ((n2bits != 0 && n3bits != 0 && n2bits == n3bits + 1)
  4107.                || (n2bits != 0 && n3bits == 0
  4108.                    && (n2bits == sizeof (long) * HOST_CHAR_BIT)
  4109.                    && n3 == LONG_MAX))
  4110.         {
  4111.           got_signed = 1;
  4112.           nbits = n2bits;
  4113.         }

  4115.       if (got_signed || got_unsigned)
  4116.         {
  4117.           return init_type (TYPE_CODE_INT, nbits / TARGET_CHAR_BIT,
  4118.                             got_unsigned ? TYPE_FLAG_UNSIGNED : 0, NULL,
  4119.                             objfile);
  4120.         }
  4121.       else
  4122.         return error_type (pp, objfile);
  4123.     }

  4125.   /* A type defined as a subrange of itself, with bounds both 0, is void.  */
  4126.   if (self_subrange && n2 == 0 && n3 == 0)
  4127.     return init_type (TYPE_CODE_VOID, 1, 0, NULL, objfile);

  4129.   /* If n3 is zero and n2 is positive, we want a floating type, and n2
  4130.      is the width in bytes.

  4132.      Fortran programs appear to use this for complex types also.  To
  4133.      distinguish between floats and complex, g77 (and others?)  seem
  4134.      to use self-subranges for the complexes, and subranges of int for
  4135.      the floats.

  4137.      Also note that for complexes, g77 sets n2 to the size of one of
  4138.      the member floats, not the whole complex beast.  My guess is that
  4139.      this was to work well with pre-COMPLEX versions of gdb.  */

  4141.   if (n3 == 0 && n2 > 0)
  4142.     {
  4143.       struct type *float_type
  4144.         = init_type (TYPE_CODE_FLT, n2, 0, NULL, objfile);

  4146.       if (self_subrange)
  4147.         {
  4148.           struct type *complex_type =
  4149.             init_type (TYPE_CODE_COMPLEX, 2 * n2, 0, NULL, objfile);

  4151.           TYPE_TARGET_TYPE (complex_type) = float_type;
  4152.           return complex_type;
  4153.         }
  4154.       else
  4155.         return float_type;
  4156.     }

  4158.   /* If the upper bound is -1, it must really be an unsigned integral.  */

  4160.   else if (n2 == 0 && n3 == -1)
  4161.     {
  4162.       int bits = type_size;

  4164.       if (bits <= 0)
  4165.         {
  4166.           /* We don't know its size.  It is unsigned int or unsigned
  4167.              long.  GCC 2.3.3 uses this for long long too, but that is
  4168.              just a GDB 3.5 compatibility hack.  */
  4169.           bits = gdbarch_int_bit (gdbarch);
  4170.         }

  4172.       return init_type (TYPE_CODE_INT, bits / TARGET_CHAR_BIT,
  4173.                         TYPE_FLAG_UNSIGNED, NULL, objfile);
  4174.     }

  4176.   /* Special case: char is defined (Who knows why) as a subrange of
  4177.      itself with range 0-127.  */
  4178.   else if (self_subrange && n2 == 0 && n3 == 127)
  4179.     return init_type (TYPE_CODE_INT, 1, TYPE_FLAG_NOSIGN, NULL, objfile);

  4181.   /* We used to do this only for subrange of self or subrange of int.  */
  4182.   else if (n2 == 0)
  4183.     {
  4184.       /* -1 is used for the upper bound of (4 byte) "unsigned int" and
  4185.          "unsigned long", and we already checked for that,
  4186.          so don't need to test for it here.  */

  4188.       if (n3 < 0)
  4189.         /* n3 actually gives the size.  */
  4190.         return init_type (TYPE_CODE_INT, -n3, TYPE_FLAG_UNSIGNED,
  4191.                           NULL, objfile);

  4193.       /* Is n3 == 2**(8n)-1 for some integer n?  Then it's an
  4194.          unsigned n-byte integer.  But do require n to be a power of
  4195.          two; we don't want 3- and 5-byte integers flying around.  */
  4196.       {
  4197.         int bytes;
  4198.         unsigned long bits;

  4200.         bits = n3;
  4201.         for (bytes = 0; (bits & 0xff) == 0xff; bytes++)
  4202.           bits >>= 8;
  4203.         if (bits == 0
  4204.             && ((bytes - 1) & bytes) == 0) /* "bytes is a power of two" */
  4205.           return init_type (TYPE_CODE_INT, bytes, TYPE_FLAG_UNSIGNED, NULL,
  4206.                             objfile);
  4207.       }
  4208.     }
  4209.   /* I think this is for Convex "long long".  Since I don't know whether
  4210.      Convex sets self_subrange, I also accept that particular size regardless
  4211.      of self_subrange.  */
  4212.   else if (n3 == 0 && n2 < 0
  4213.            && (self_subrange
  4214.                || n2 == -gdbarch_long_long_bit
  4215.                           (gdbarch) / TARGET_CHAR_BIT))
  4216.     return init_type (TYPE_CODE_INT, -n2, 0, NULL, objfile);
  4217.   else if (n2 == -n3 - 1)
  4218.     {
  4219.       if (n3 == 0x7f)
  4220.         return init_type (TYPE_CODE_INT, 1, 0, NULL, objfile);
  4221.       if (n3 == 0x7fff)
  4222.         return init_type (TYPE_CODE_INT, 2, 0, NULL, objfile);
  4223.       if (n3 == 0x7fffffff)
  4224.         return init_type (TYPE_CODE_INT, 4, 0, NULL, objfile);
  4225.     }

  4227.   /* We have a real range type on our hands.  Allocate space and
  4228.      return a real pointer.  */
  4229. handle_true_range:

  4231.   if (self_subrange)
  4232.     index_type = objfile_type (objfile)->builtin_int;
  4233.   else
  4234.     index_type = *dbx_lookup_type (rangenums, objfile);
  4235.   if (index_type == NULL)
  4236.     {
  4237.       /* Does this actually ever happen?  Is that why we are worrying
  4238.          about dealing with it rather than just calling error_type?  */

  4240.       complaint (&symfile_complaints,
  4241.                  _("base type %d of range type is not defined"), rangenums[1]);

  4243.       index_type = objfile_type (objfile)->builtin_int;
  4244.     }

  4246.   result_type
  4247.     = create_static_range_type ((struct type *) NULL, index_type, n2, n3);
  4248.   return (result_type);
  4249. }

  4251. /* Read in an argument list.  This is a list of types, separated by commas
  4252.    and terminated with END.  Return the list of types read in, or NULL
  4253.    if there is an error.  */

  4255. static struct field *
  4256. ‌read_args (char **pp, int end, struct objfile *objfile, int *nargsp,
  4257.            int *varargsp)
  4258. {
  4259.   /* FIXME!  Remove this arbitrary limit!  */
  4260.   struct type *types[1024];        /* Allow for fns of 1023 parameters.  */
  4261.   int n = 0, i;
  4262.   struct field *rval;

  4264.   while (**pp != end)
  4265.     {
  4266.       if (**pp != ',')
  4267.         /* Invalid argument list: no ','.  */
  4268.         return NULL;
  4269.       (*pp)++;
  4270.       STABS_CONTINUE (pp, objfile);
  4271.       types[n++] = read_type (pp, objfile);
  4272.     }
  4273.   (*pp)++;                        /* get past `end' (the ':' character).  */

  4275.   if (n == 0)
  4276.     {
  4277.       /* We should read at least the THIS parameter here.  Some broken stabs
  4278.          output contained `(0,41),(0,42)=@s8;-16;,(0,43),(0,1);' where should
  4279.          have been present ";-16,(0,43)" reference instead.  This way the
  4280.          excessive ";" marker prematurely stops the parameters parsing.  */

  4282.       complaint (&symfile_complaints, _("Invalid (empty) method arguments"));
  4283.       *varargsp = 0;
  4284.     }
  4285.   else if (TYPE_CODE (types[n - 1]) != TYPE_CODE_VOID)
  4286.     *varargsp = 1;
  4287.   else
  4288.     {
  4289.       n--;
  4290.       *varargsp = 0;
  4291.     }

  4293.   rval = (struct field *) xmalloc (n * sizeof (struct field));
  4294.   memset (rval, 0, n * sizeof (struct field));
  4295.   for (i = 0; i < n; i++)
  4296.     rval[i].type = types[i];
  4297.   *nargsp = n;
  4298.   return rval;
  4299. }

  4301. /* Common block handling.  */

  4303. /* List of symbols declared since the last BCOMM.  This list is a tail
  4304.    of local_symbols.  When ECOMM is seen, the symbols on the list
  4305.    are noted so their proper addresses can be filled in later,
  4306.    using the common block base address gotten from the assembler
  4307.    stabs.  */

  4309. ‌static struct pending *common_block;
  4310. ‌static int common_block_i;

  4312. /* Name of the current common block.  We get it from the BCOMM instead of the
  4313.    ECOMM to match IBM documentation (even though IBM puts the name both places
  4314.    like everyone else).  */
  4315. ‌static char *common_block_name;

  4317. /* Process a N_BCOMM symbol.  The storage for NAME is not guaranteed
  4318.    to remain after this function returns.  */

  4320. void
  4321. ‌common_block_start (char *name, struct objfile *objfile)
  4322. {
  4323.   if (common_block_name != NULL)
  4324.     {
  4325.       complaint (&symfile_complaints,
  4326.                  _("Invalid symbol data: common block within common block"));
  4327.     }
  4328.   common_block = local_symbols;
  4329.   common_block_i = local_symbols ? local_symbols->nsyms : 0;
  4330.   common_block_name = obstack_copy0 (&objfile->objfile_obstack,
  4331.                                      name, strlen (name));
  4332. }

  4334. /* Process a N_ECOMM symbol.  */

  4336. void
  4337. ‌common_block_end (struct objfile *objfile)
  4338. {
  4339.   /* Symbols declared since the BCOMM are to have the common block
  4340.      start address added in when we know it.  common_block and
  4341.      common_block_i point to the first symbol after the BCOMM in
  4342.      the local_symbols list; copy the list and hang it off the
  4343.      symbol for the common block name for later fixup.  */
  4344.   int i;
  4345.   struct symbol *sym;
  4346.   struct pending *new = 0;
  4347.   struct pending *next;
  4348.   int j;

  4350.   if (common_block_name == NULL)
  4351.     {
  4352.       complaint (&symfile_complaints, _("ECOMM symbol unmatched by BCOMM"));
  4353.       return;
  4354.     }

  4356.   sym = allocate_symbol (objfile);
  4357.   /* Note: common_block_name already saved on objfile_obstack.  */
  4358.   SYMBOL_SET_LINKAGE_NAME (sym, common_block_name);
  4359.   SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK;

  4361.   /* Now we copy all the symbols which have been defined since the BCOMM.  */

  4363.   /* Copy all the struct pendings before common_block.  */
  4364.   for (next = local_symbols;
  4365.        next != NULL && next != common_block;
  4366.        next = next->next)
  4367.     {
  4368.       for (j = 0; j < next->nsyms; j++)
  4369.         add_symbol_to_list (next->symbol[j], &new);
  4370.     }

  4372.   /* Copy however much of COMMON_BLOCK we need.  If COMMON_BLOCK is
  4373.      NULL, it means copy all the local symbols (which we already did
  4374.      above).  */

  4376.   if (common_block != NULL)
  4377.     for (j = common_block_i; j < common_block->nsyms; j++)
  4378.       add_symbol_to_list (common_block->symbol[j], &new);

  4380.   SYMBOL_TYPE (sym) = (struct type *) new;

  4382.   /* Should we be putting local_symbols back to what it was?
  4383.      Does it matter?  */

  4385.   i = hashname (SYMBOL_LINKAGE_NAME (sym));
  4386.   SYMBOL_VALUE_CHAIN (sym) = global_sym_chain[i];
  4387.   global_sym_chain[i] = sym;
  4388.   common_block_name = NULL;
  4389. }

  4391. /* Add a common block's start address to the offset of each symbol
  4392.    declared to be in it (by being between a BCOMM/ECOMM pair that uses
  4393.    the common block name).  */

  4395. static void
  4396. ‌fix_common_block (struct symbol *sym, CORE_ADDR valu)
  4397. {
  4398.   struct pending *next = (struct pending *) SYMBOL_TYPE (sym);

  4400.   for (; next; next = next->next)
  4401.     {
  4402.       int j;

  4404.       for (j = next->nsyms - 1; j >= 0; j--)
  4405.         SYMBOL_VALUE_ADDRESS (next->symbol[j]) += valu;
  4406.     }
  4407. }



  4411. /* Add {TYPE, TYPENUMS} to the NONAME_UNDEFS vector.
  4412.    See add_undefined_type for more details.  */

  4414. static void
  4415. ‌add_undefined_type_noname (struct type *type, int typenums[2])
  4416. {
  4417.   struct nat nat;

  4419.   nat.typenums[0] = typenums [0];
  4420.   nat.typenums[1] = typenums [1];
  4421.   nat.type = type;

  4423.   if (noname_undefs_length == noname_undefs_allocated)
  4424.     {
  4425.       noname_undefs_allocated *= 2;
  4426.       noname_undefs = (struct nat *)
  4427.         xrealloc ((char *) noname_undefs,
  4428.                   noname_undefs_allocated * sizeof (struct nat));
  4429.     }
  4430.   noname_undefs[noname_undefs_length++] = nat;
  4431. }

  4433. /* Add TYPE to the UNDEF_TYPES vector.
  4434.    See add_undefined_type for more details.  */

  4436. static void
  4437. ‌add_undefined_type_1 (struct type *type)
  4438. {
  4439.   if (undef_types_length == undef_types_allocated)
  4440.     {
  4441.       undef_types_allocated *= 2;
  4442.       undef_types = (struct type **)
  4443.         xrealloc ((char *) undef_types,
  4444.                   undef_types_allocated * sizeof (struct type *));
  4445.     }
  4446.   undef_types[undef_types_length++] = type;
  4447. }

  4449. /* What about types defined as forward references inside of a small lexical
  4450.    scope?  */
  4451. /* Add a type to the list of undefined types to be checked through
  4452.    once this file has been read in.

  4454.    In practice, we actually maintain two such lists: The first list
  4455.    (UNDEF_TYPES) is used for types whose name has been provided, and
  4456.    concerns forward references (eg 'xs' or 'xu' forward references);
  4457.    the second list (NONAME_UNDEFS) is used for types whose name is
  4458.    unknown at creation time, because they were referenced through
  4459.    their type number before the actual type was declared.
  4460.    This function actually adds the given type to the proper list.  */

  4462. static void
  4463. ‌add_undefined_type (struct type *type, int typenums[2])
  4464. {
  4465.   if (TYPE_TAG_NAME (type) == NULL)
  4466.     add_undefined_type_noname (type, typenums);
  4467.   else
  4468.     add_undefined_type_1 (type);
  4469. }

  4471. /* Try to fix all undefined types pushed on the UNDEF_TYPES vector.  */

  4473. static void
  4474. ‌cleanup_undefined_types_noname (struct objfile *objfile)
  4475. {
  4476.   int i;

  4478.   for (i = 0; i < noname_undefs_length; i++)
  4479.     {
  4480.       struct nat nat = noname_undefs[i];
  4481.       struct type **type;

  4483.       type = dbx_lookup_type (nat.typenums, objfile);
  4484.       if (nat.type != *type && TYPE_CODE (*type) != TYPE_CODE_UNDEF)
  4485.         {
  4486.           /* The instance flags of the undefined type are still unset,
  4487.              and needs to be copied over from the reference type.
  4488.              Since replace_type expects them to be identical, we need
  4489.              to set these flags manually before hand.  */
  4490.           TYPE_INSTANCE_FLAGS (nat.type) = TYPE_INSTANCE_FLAGS (*type);
  4491.           replace_type (nat.type, *type);
  4492.         }
  4493.     }

  4495.   noname_undefs_length = 0;
  4496. }

  4498. /* Go through each undefined type, see if it's still undefined, and fix it
  4499.    up if possible.  We have two kinds of undefined types:

  4501.    TYPE_CODE_ARRAY:  Array whose target type wasn't defined yet.
  4502.    Fix:  update array length using the element bounds
  4503.    and the target type's length.
  4504.    TYPE_CODE_STRUCT, TYPE_CODE_UNION:  Structure whose fields were not
  4505.    yet defined at the time a pointer to it was made.
  4506.    Fix:  Do a full lookup on the struct/union tag.  */

  4508. static void
  4509. ‌cleanup_undefined_types_1 (void)
  4510. {
  4511.   struct type **type;

  4513.   /* Iterate over every undefined type, and look for a symbol whose type
  4514.      matches our undefined type.  The symbol matches if:
  4515.        1. It is a typedef in the STRUCT domain;
  4516.        2. It has the same name, and same type code;
  4517.        3. The instance flags are identical.

  4519.      It is important to check the instance flags, because we have seen
  4520.      examples where the debug info contained definitions such as:

  4522.          "foo_t:t30=B31=xefoo_t:"

  4524.      In this case, we have created an undefined type named "foo_t" whose
  4525.      instance flags is null (when processing "xefoo_t"), and then created
  4526.      another type with the same name, but with different instance flags
  4527.      ('B' means volatile).  I think that the definition above is wrong,
  4528.      since the same type cannot be volatile and non-volatile at the same
  4529.      time, but we need to be able to cope with it when it happens.  The
  4530.      approach taken here is to treat these two types as different.  */

  4532.   for (type = undef_types; type < undef_types + undef_types_length; type++)
  4533.     {
  4534.       switch (TYPE_CODE (*type))
  4535.         {

  4537.         case TYPE_CODE_STRUCT:
  4538.         case TYPE_CODE_UNION:
  4539.         case TYPE_CODE_ENUM:
  4540.           {
  4541.             /* Check if it has been defined since.  Need to do this here
  4542.                as well as in check_typedef to deal with the (legitimate in
  4543.                C though not C++) case of several types with the same name
  4544.                in different source files.  */
  4545.             if (TYPE_STUB (*type))
  4546.               {
  4547.                 struct pending *ppt;
  4548.                 int i;
  4549.                 /* Name of the type, without "struct" or "union".  */
  4550.                 const char *typename = TYPE_TAG_NAME (*type);

  4552.                 if (typename == NULL)
  4553.                   {
  4554.                     complaint (&symfile_complaints, _("need a type name"));
  4555.                     break;
  4556.                   }
  4557.                 for (ppt = file_symbols; ppt; ppt = ppt->next)
  4558.                   {
  4559.                     for (i = 0; i < ppt->nsyms; i++)
  4560.                       {
  4561.                         struct symbol *sym = ppt->symbol[i];

  4563.                         if (SYMBOL_CLASS (sym) == LOC_TYPEDEF
  4564.                             && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
  4565.                             && (TYPE_CODE (SYMBOL_TYPE (sym)) ==
  4566.                                 TYPE_CODE (*type))
  4567.                             && (TYPE_INSTANCE_FLAGS (*type) ==
  4568.                                 TYPE_INSTANCE_FLAGS (SYMBOL_TYPE (sym)))
  4569.                             && strcmp (SYMBOL_LINKAGE_NAME (sym),
  4570.                                        typename) == 0)
  4571.                           replace_type (*type, SYMBOL_TYPE (sym));
  4572.                       }
  4573.                   }
  4574.               }
  4575.           }
  4576.           break;

  4578.         default:
  4579.           {
  4580.             complaint (&symfile_complaints,
  4581.                        _("forward-referenced types left unresolved, "
  4582.                        "type code %d."),
  4583.                        TYPE_CODE (*type));
  4584.           }
  4585.           break;
  4586.         }
  4587.     }

  4589.   undef_types_length = 0;
  4590. }

  4592. /* Try to fix all the undefined types we ecountered while processing
  4593.    this unit.  */

  4595. void
  4596. ‌cleanup_undefined_stabs_types (struct objfile *objfile)
  4597. {
  4598.   cleanup_undefined_types_1 ();
  4599.   cleanup_undefined_types_noname (objfile);
  4600. }

  4602. /* Scan through all of the global symbols defined in the object file,
  4603.    assigning values to the debugging symbols that need to be assigned
  4604.    to.  Get these symbols from the minimal symbol table.  */

  4606. void
  4607. ‌scan_file_globals (struct objfile *objfile)
  4608. {
  4609.   int hash;
  4610.   struct minimal_symbol *msymbol;
  4611.   struct symbol *sym, *prev;
  4612.   struct objfile *resolve_objfile;

  4614.   /* SVR4 based linkers copy referenced global symbols from shared
  4615.      libraries to the main executable.
  4616.      If we are scanning the symbols for a shared library, try to resolve
  4617.      them from the minimal symbols of the main executable first.  */

  4619.   if (symfile_objfile && objfile != symfile_objfile)
  4620.     resolve_objfile = symfile_objfile;
  4621.   else
  4622.     resolve_objfile = objfile;

  4624.   while (1)
  4625.     {
  4626.       /* Avoid expensive loop through all minimal symbols if there are
  4627.          no unresolved symbols.  */
  4628.       for (hash = 0; hash < HASHSIZE; hash++)
  4629.         {
  4630.           if (global_sym_chain[hash])
  4631.             break;
  4632.         }
  4633.       if (hash >= HASHSIZE)
  4634.         return;

  4636.       ALL_OBJFILE_MSYMBOLS (resolve_objfile, msymbol)
  4637.         {
  4638.           QUIT;

  4640.           /* Skip static symbols.  */
  4641.           switch (MSYMBOL_TYPE (msymbol))
  4642.             {
  4643.             case mst_file_text:
  4644.             case mst_file_data:
  4645.             case mst_file_bss:
  4646.               continue;
  4647.             default:
  4648.               break;
  4649.             }

  4651.           prev = NULL;

  4653.           /* Get the hash index and check all the symbols
  4654.              under that hash index.  */

  4656.           hash = hashname (MSYMBOL_LINKAGE_NAME (msymbol));

  4658.           for (sym = global_sym_chain[hash]; sym;)
  4659.             {
  4660.               if (strcmp (MSYMBOL_LINKAGE_NAME (msymbol),
  4661.                           SYMBOL_LINKAGE_NAME (sym)) == 0)
  4662.                 {
  4663.                   /* Splice this symbol out of the hash chain and
  4664.                      assign the value we have to it.  */
  4665.                   if (prev)
  4666.                     {
  4667.                       SYMBOL_VALUE_CHAIN (prev) = SYMBOL_VALUE_CHAIN (sym);
  4668.                     }
  4669.                   else
  4670.                     {
  4671.                       global_sym_chain[hash] = SYMBOL_VALUE_CHAIN (sym);
  4672.                     }

  4674.                   /* Check to see whether we need to fix up a common block.  */
  4675.                   /* Note: this code might be executed several times for
  4676.                      the same symbol if there are multiple references.  */
  4677.                   if (sym)
  4678.                     {
  4679.                       if (SYMBOL_CLASS (sym) == LOC_BLOCK)
  4680.                         {
  4681.                           fix_common_block (sym,
  4682.                                             MSYMBOL_VALUE_ADDRESS (resolve_objfile,
  4683.                                                                    msymbol));
  4684.                         }
  4685.                       else
  4686.                         {
  4687.                           SYMBOL_VALUE_ADDRESS (sym)
  4688.                             = MSYMBOL_VALUE_ADDRESS (resolve_objfile, msymbol);
  4689.                         }
  4690.                       SYMBOL_SECTION (sym) = MSYMBOL_SECTION (msymbol);
  4691.                     }

  4693.                   if (prev)
  4694.                     {
  4695.                       sym = SYMBOL_VALUE_CHAIN (prev);
  4696.                     }
  4697.                   else
  4698.                     {
  4699.                       sym = global_sym_chain[hash];
  4700.                     }
  4701.                 }
  4702.               else
  4703.                 {
  4704.                   prev = sym;
  4705.                   sym = SYMBOL_VALUE_CHAIN (sym);
  4706.                 }
  4707.             }
  4708.         }
  4709.       if (resolve_objfile == objfile)
  4710.         break;
  4711.       resolve_objfile = objfile;
  4712.     }

  4714.   /* Change the storage class of any remaining unresolved globals to
  4715.      LOC_UNRESOLVED and remove them from the chain.  */
  4716.   for (hash = 0; hash < HASHSIZE; hash++)
  4717.     {
  4718.       sym = global_sym_chain[hash];
  4719.       while (sym)
  4720.         {
  4721.           prev = sym;
  4722.           sym = SYMBOL_VALUE_CHAIN (sym);

  4724.           /* Change the symbol address from the misleading chain value
  4725.              to address zero.  */
  4726.           SYMBOL_VALUE_ADDRESS (prev) = 0;

  4728.           /* Complain about unresolved common block symbols.  */
  4729.           if (SYMBOL_CLASS (prev) == LOC_STATIC)
  4730.             SYMBOL_ACLASS_INDEX (prev) = LOC_UNRESOLVED;
  4731.           else
  4732.             complaint (&symfile_complaints,
  4733.                        _("%s: common block `%s' from "
  4734.                          "global_sym_chain unresolved"),
  4735.                        objfile_name (objfile), SYMBOL_PRINT_NAME (prev));
  4736.         }
  4737.     }
  4738.   memset (global_sym_chain, 0, sizeof (global_sym_chain));
  4739. }

  4741. /* Initialize anything that needs initializing when starting to read
  4742.    a fresh piece of a symbol file, e.g. reading in the stuff corresponding
  4743.    to a psymtab.  */

  4745. void
  4746. ‌stabsread_init (void)
  4747. {
  4748. }

  4750. /* Initialize anything that needs initializing when a completely new
  4751.    symbol file is specified (not just adding some symbols from another
  4752.    file, e.g. a shared library).  */

  4754. void
  4755. ‌stabsread_new_init (void)
  4756. {
  4757.   /* Empty the hash table of global syms looking for values.  */
  4758.   memset (global_sym_chain, 0, sizeof (global_sym_chain));
  4759. }

  4761. /* Initialize anything that needs initializing at the same time as
  4762.    start_symtab() is called.  */

  4764. void
  4765. ‌start_stabs (void)
  4766. {
  4767.   global_stabs = NULL;                /* AIX COFF */
  4768.   /* Leave FILENUM of 0 free for builtin types and this file's types.  */
  4769.   n_this_object_header_files = 1;
  4770.   type_vector_length = 0;
  4771.   type_vector = (struct type **) 0;

  4773.   /* FIXME: If common_block_name is not already NULL, we should complain().  */
  4774.   common_block_name = NULL;
  4775. }

  4777. /* Call after end_symtab().  */

  4779. void
  4780. ‌end_stabs (void)
  4781. {
  4782.   if (type_vector)
  4783.     {
  4784.       xfree (type_vector);
  4785.     }
  4786.   type_vector = 0;
  4787.   type_vector_length = 0;
  4788.   previous_stab_code = 0;
  4789. }

  4791. void
  4792. ‌finish_global_stabs (struct objfile *objfile)
  4793. {
  4794.   if (global_stabs)
  4795.     {
  4796.       patch_block_stabs (global_symbols, global_stabs, objfile);
  4797.       xfree (global_stabs);
  4798.       global_stabs = NULL;
  4799.     }
  4800. }

  4802. /* Find the end of the name, delimited by a ':', but don't match
  4803.    ObjC symbols which look like -[Foo bar::]:bla.  */
  4804. static char *
  4805. ‌find_name_end (char *name)
  4806. {
  4807.   char *s = name;

  4809.   if (s[0] == '-' || *s == '+')
  4810.     {
  4811.       /* Must be an ObjC method symbol.  */
  4812.       if (s[1] != '[')
  4813.         {
  4814.           error (_("invalid symbol name \"%s\""), name);
  4815.         }
  4816.       s = strchr (s, ']');
  4817.       if (s == NULL)
  4818.         {
  4819.           error (_("invalid symbol name \"%s\""), name);
  4820.         }
  4821.       return strchr (s, ':');
  4822.     }
  4823.   else
  4824.     {
  4825.       return strchr (s, ':');
  4826.     }
  4827. }

  4829. /* Initializer for this module.  */

  4831. void
  4832. ‌_initialize_stabsread (void)
  4833. {
  4834.   rs6000_builtin_type_data = register_objfile_data ();

  4836.   undef_types_allocated = 20;
  4837.   undef_types_length = 0;
  4838.   undef_types = (struct type **)
  4839.     xmalloc (undef_types_allocated * sizeof (struct type *));

  4841.   noname_undefs_allocated = 20;
  4842.   noname_undefs_length = 0;
  4843.   noname_undefs = (struct nat *)
  4844.     xmalloc (noname_undefs_allocated * sizeof (struct nat));

  4846.   stab_register_index = register_symbol_register_impl (LOC_REGISTER,
  4847.                                                        &stab_register_funcs);
  4848.   stab_regparm_index = register_symbol_register_impl (LOC_REGPARM_ADDR,
  4849.                                                       &stab_register_funcs);
  4850. }