gdb/buildsym.h

   1 /* Build symbol tables in GDB's internal format.
   2    Copyright 1986-1993, 1996-1999 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #if !defined (BUILDSYM_H)
  22 #define BUILDSYM_H 1
  23
  24 /* This module provides definitions used for creating and adding to
  25    the symbol table.  These routines are called from various symbol-
  26    file-reading routines.
  27
  28    They originated in dbxread.c of gdb-4.2, and were split out to
  29    make xcoffread.c more maintainable by sharing code.
  30
  31    Variables declared in this file can be defined by #define-ing the
  32    name EXTERN to null.  It is used to declare variables that are
  33    normally extern, but which get defined in a single module using
  34    this technique.  */
  35
  36 #ifndef EXTERN
  37 #define EXTERN extern
  38 #endif
  39
  40 #define HASHSIZE 127            /* Size of things hashed via
  41                                    hashname() */
  42
  43 /* Name of source file whose symbol data we are now processing.  This
  44    comes from a symbol of type N_SO. */
  45
  46 EXTERN char *last_source_file;
  47
  48 /* Core address of start of text of current source file.  This too
  49    comes from the N_SO symbol. */
  50
  51 EXTERN CORE_ADDR last_source_start_addr;
  52
  53 /* The list of sub-source-files within the current individual
  54    compilation.  Each file gets its own symtab with its own linetable
  55    and associated info, but they all share one blockvector.  */
  56
  57 struct subfile
  58   {
  59     struct subfile *next;
  60     char *name;
  61     char *dirname;
  62     struct linetable *line_vector;
  63     int line_vector_length;
  64     enum language language;
  65     char *debugformat;
  66   };
  67
  68 EXTERN struct subfile *subfiles;
  69
  70 EXTERN struct subfile *current_subfile;
  71
  72 /* Global variable which, when set, indicates that we are processing a
  73    .o file compiled with gcc */
  74
  75 EXTERN unsigned char processing_gcc_compilation;
  76
  77 /* When set, we are processing a .o file compiled by sun acc.  This is
  78    misnamed; it refers to all stabs-in-elf implementations which use
  79    N_UNDF the way Sun does, including Solaris gcc.  Hopefully all
  80    stabs-in-elf implementations ever invented will choose to be
  81    compatible.  */
  82
  83 EXTERN unsigned char processing_acc_compilation;
  84
  85 /* elz: added this flag to know when a block is compiled with HP
  86    compilers (cc, aCC). This is necessary because of the macro
  87    COERCE_FLOAT_TO_DOUBLE defined in tm_hppa.h, which causes a
  88    coercion of float to double to always occur in parameter passing
  89    for a function called by gdb (see the function value_arg_coerce in
  90    valops.c). This is necessary only if the target was compiled with
  91    gcc, not with HP compilers or with g++ */
  92
  93 EXTERN unsigned char processing_hp_compilation;
  94
  95 /* Count symbols as they are processed, for error messages.  */
  96
  97 EXTERN unsigned int symnum;
  98
  99 /* Record the symbols defined for each context in a list.  We don't
 100    create a struct block for the context until we know how long to
 101    make it.  */
 102
 103 #define PENDINGSIZE 100
 104
 105 struct pending
 106   {
 107     struct pending *next;
 108     int nsyms;
 109     struct symbol *symbol[PENDINGSIZE];
 110   };
 111
 112 /* Here are the three lists that symbols are put on.  */
 113
 114 /* static at top level, and types */
 115
 116 EXTERN struct pending *file_symbols;
 117
 118 /* global functions and variables */
 119
 120 EXTERN struct pending *global_symbols;
 121
 122 /* everything local to lexical context */
 123
 124 EXTERN struct pending *local_symbols;
 125
 126 /* func params local to lexical  context */
 127
 128 EXTERN struct pending *param_symbols;
 129
 130 /* Stack representing unclosed lexical contexts (that will become
 131    blocks, eventually).  */
 132
 133 struct context_stack
 134   {
 135     /* Outer locals at the time we entered */
 136
 137     struct pending *locals;
 138
 139     /* Pending func params at the time we entered */
 140
 141     struct pending *params;
 142
 143     /* Pointer into blocklist as of entry */
 144
 145     struct pending_block *old_blocks;
 146
 147     /* Name of function, if any, defining context */
 148
 149     struct symbol *name;
 150
 151     /* PC where this context starts */
 152
 153     CORE_ADDR start_addr;
 154
 155     /* Temp slot for exception handling. */
 156
 157     CORE_ADDR end_addr;
 158
 159     /* For error-checking matching push/pop */
 160
 161     int depth;
 162
 163   };
 164
 165 EXTERN struct context_stack *context_stack;
 166
 167 /* Index of first unused entry in context stack.  */
 168
 169 EXTERN int context_stack_depth;
 170
 171 /* Currently allocated size of context stack.  */
 172
 173 EXTERN int context_stack_size;
 174
 175 /* Macro "function" for popping contexts from the stack.  Pushing is
 176    done by a real function, push_context.  This returns a pointer to a
 177    struct context_stack.  */
 178
 179 #define pop_context() (&context_stack[--context_stack_depth]);
 180
 181 /* Nonzero if within a function (so symbols should be local, if
 182    nothing says specifically).  */
 183
 184 EXTERN int within_function;
 185
 186 /* List of blocks already made (lexical contexts already closed).
 187    This is used at the end to make the blockvector.  */
 188
 189 struct pending_block
 190   {
 191     struct pending_block *next;
 192     struct block *block;
 193   };
 194
 195 /* Pointer to the head of a linked list of symbol blocks which have
 196    already been finalized (lexical contexts already closed) and which
 197    are just waiting to be built into a blockvector when finalizing the
 198    associated symtab. */
 199
 200 EXTERN struct pending_block *pending_blocks;
 201 \f
 202
 203 struct subfile_stack
 204   {
 205     struct subfile_stack *next;
 206     char *name;
 207   };
 208
 209 EXTERN struct subfile_stack *subfile_stack;
 210
 211 #define next_symbol_text(objfile) (*next_symbol_text_func)(objfile)
 212
 213 /* Function to invoke get the next symbol.  Return the symbol name. */
 214
 215 EXTERN char *(*next_symbol_text_func) (struct objfile *);
 216
 217 /* Vector of types defined so far, indexed by their type numbers.
 218    Used for both stabs and coff.  (In newer sun systems, dbx uses a
 219    pair of numbers in parens, as in "(SUBFILENUM,NUMWITHINSUBFILE)".
 220    Then these numbers must be translated through the type_translations
 221    hash table to get the index into the type vector.)  */
 222
 223 EXTERN struct type **type_vector;
 224
 225 /* Number of elements allocated for type_vector currently.  */
 226
 227 EXTERN int type_vector_length;
 228
 229 /* Initial size of type vector.  Is realloc'd larger if needed, and
 230    realloc'd down to the size actually used, when completed.  */
 231
 232 #define INITIAL_TYPE_VECTOR_LENGTH      160
 233
 234 extern void add_symbol_to_list (struct symbol *symbol,
 235                                 struct pending **listhead);
 236
 237 extern struct symbol *find_symbol_in_list (struct pending *list,
 238                                            char *name, int length);
 239
 240 extern void finish_block (struct symbol *symbol,
 241                           struct pending **listhead,
 242                           struct pending_block *old_blocks,
 243                           CORE_ADDR start, CORE_ADDR end,
 244                           struct objfile *objfile);
 245
 246 extern void really_free_pendings (PTR dummy);
 247
 248 extern void start_subfile (char *name, char *dirname);
 249
 250 extern void patch_subfile_names (struct subfile *subfile, char *name);
 251
 252 extern void push_subfile (void);
 253
 254 extern char *pop_subfile (void);
 255
 256 extern struct symtab *end_symtab (CORE_ADDR end_addr,
 257                                   struct objfile *objfile, int section);
 258
 259 /* Defined in stabsread.c.  */
 260
 261 extern void scan_file_globals (struct objfile *objfile);
 262
 263 extern void buildsym_new_init (void);
 264
 265 extern void buildsym_init (void);
 266
 267 extern struct context_stack *push_context (int desc, CORE_ADDR valu);
 268
 269 extern void record_line (struct subfile *subfile, int line, CORE_ADDR pc);
 270
 271 extern void start_symtab (char *name, char *dirname, CORE_ADDR start_addr);
 272
 273 extern int hashname (char *name);
 274
 275 extern void free_pending_blocks (void);
 276
 277 /* FIXME: Note that this is used only in buildsym.c and dstread.c,
 278    which should be fixed to not need direct access to
 279    make_blockvector. */
 280
 281 extern struct blockvector *make_blockvector (struct objfile *objfile);
 282
 283 /* FIXME: Note that this is used only in buildsym.c and dstread.c,
 284    which should be fixed to not need direct access to
 285    record_pending_block. */
 286
 287 extern void record_pending_block (struct objfile *objfile,
 288                                   struct block *block,
 289                                   struct pending_block *opblock);
 290
 291 extern void record_debugformat (char *format);
 292
 293 extern void merge_symbol_lists (struct pending **srclist,
 294                                 struct pending **targetlist);
 295
 296 #undef EXTERN
 297
 298 #endif /* defined (BUILDSYM_H) */