gdb/buildsym.h

   1 /* Build symbol tables in GDB's internal format.
   2    Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1995, 1996,
   3    1997, 1998, 1999, 2000, 2002, 2003, 2007 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   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.
  11
  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.
  16
  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/>.  */
  19
  20 #if !defined (BUILDSYM_H)
  21 #define BUILDSYM_H 1
  22
  23 struct objfile;
  24 struct symbol;
  25 struct addrmap;
  26
  27 /* This module provides definitions used for creating and adding to
  28    the symbol table.  These routines are called from various symbol-
  29    file-reading routines.
  30
  31    They originated in dbxread.c of gdb-4.2, and were split out to
  32    make xcoffread.c more maintainable by sharing code.
  33
  34    Variables declared in this file can be defined by #define-ing the
  35    name EXTERN to null.  It is used to declare variables that are
  36    normally extern, but which get defined in a single module using
  37    this technique.  */
  38
  39 struct block;
  40
  41 #ifndef EXTERN
  42 #define EXTERN extern
  43 #endif
  44
  45 #define HASHSIZE 127            /* Size of things hashed via
  46                                    hashname() */
  47
  48 /* Name of source file whose symbol data we are now processing.  This
  49    comes from a symbol of type N_SO. */
  50
  51 EXTERN char *last_source_file;
  52
  53 /* Core address of start of text of current source file.  This too
  54    comes from the N_SO symbol. */
  55
  56 EXTERN CORE_ADDR last_source_start_addr;
  57
  58 /* The list of sub-source-files within the current individual
  59    compilation.  Each file gets its own symtab with its own linetable
  60    and associated info, but they all share one blockvector.  */
  61
  62 struct subfile
  63   {
  64     struct subfile *next;
  65     char *name;
  66     char *dirname;
  67     struct linetable *line_vector;
  68     int line_vector_length;
  69     enum language language;
  70     char *producer;
  71     char *debugformat;
  72     struct symtab *symtab;
  73   };
  74
  75 EXTERN struct subfile *current_subfile;
  76
  77 /* Global variable which, when set, indicates that we are processing a
  78    .o file compiled with gcc */
  79
  80 EXTERN unsigned char processing_gcc_compilation;
  81
  82 /* When set, we are processing a .o file compiled by sun acc.  This is
  83    misnamed; it refers to all stabs-in-elf implementations which use
  84    N_UNDF the way Sun does, including Solaris gcc.  Hopefully all
  85    stabs-in-elf implementations ever invented will choose to be
  86    compatible.  */
  87
  88 EXTERN unsigned char processing_acc_compilation;
  89
  90 /* Count symbols as they are processed, for error messages.  */
  91
  92 EXTERN unsigned int symnum;
  93
  94 /* Record the symbols defined for each context in a list.  We don't
  95    create a struct block for the context until we know how long to
  96    make it.  */
  97
  98 #define PENDINGSIZE 100
  99
 100 struct pending
 101   {
 102     struct pending *next;
 103     int nsyms;
 104     struct symbol *symbol[PENDINGSIZE];
 105   };
 106
 107 /* Here are the three lists that symbols are put on.  */
 108
 109 /* static at top level, and types */
 110
 111 EXTERN struct pending *file_symbols;
 112
 113 /* global functions and variables */
 114
 115 EXTERN struct pending *global_symbols;
 116
 117 /* everything local to lexical context */
 118
 119 EXTERN struct pending *local_symbols;
 120
 121 /* func params local to lexical  context */
 122
 123 EXTERN struct pending *param_symbols;
 124
 125 /* Stack representing unclosed lexical contexts (that will become
 126    blocks, eventually).  */
 127
 128 struct context_stack
 129   {
 130     /* Outer locals at the time we entered */
 131
 132     struct pending *locals;
 133
 134     /* Pending func params at the time we entered */
 135
 136     struct pending *params;
 137
 138     /* Pointer into blocklist as of entry */
 139
 140     struct pending_block *old_blocks;
 141
 142     /* Name of function, if any, defining context */
 143
 144     struct symbol *name;
 145
 146     /* PC where this context starts */
 147
 148     CORE_ADDR start_addr;
 149
 150     /* Temp slot for exception handling. */
 151
 152     CORE_ADDR end_addr;
 153
 154     /* For error-checking matching push/pop */
 155
 156     int depth;
 157
 158   };
 159
 160 EXTERN struct context_stack *context_stack;
 161
 162 /* Index of first unused entry in context stack.  */
 163
 164 EXTERN int context_stack_depth;
 165
 166 /* Currently allocated size of context stack.  */
 167
 168 EXTERN int context_stack_size;
 169
 170 /* Non-zero if the context stack is empty.  */
 171 #define outermost_context_p() (context_stack_depth == 0)
 172
 173 /* Nonzero if within a function (so symbols should be local, if
 174    nothing says specifically).  */
 175
 176 EXTERN int within_function;
 177
 178 /* List of blocks already made (lexical contexts already closed).
 179    This is used at the end to make the blockvector.  */
 180
 181 struct pending_block
 182   {
 183     struct pending_block *next;
 184     struct block *block;
 185   };
 186
 187 /* Pointer to the head of a linked list of symbol blocks which have
 188    already been finalized (lexical contexts already closed) and which
 189    are just waiting to be built into a blockvector when finalizing the
 190    associated symtab. */
 191
 192 EXTERN struct pending_block *pending_blocks;
 193 \f
 194
 195 struct subfile_stack
 196   {
 197     struct subfile_stack *next;
 198     char *name;
 199   };
 200
 201 EXTERN struct subfile_stack *subfile_stack;
 202
 203 #define next_symbol_text(objfile) (*next_symbol_text_func)(objfile)
 204
 205 /* Function to invoke get the next symbol.  Return the symbol name. */
 206
 207 EXTERN char *(*next_symbol_text_func) (struct objfile *);
 208
 209 /* Vector of types defined so far, indexed by their type numbers.
 210    Used for both stabs and coff.  (In newer sun systems, dbx uses a
 211    pair of numbers in parens, as in "(SUBFILENUM,NUMWITHINSUBFILE)".
 212    Then these numbers must be translated through the type_translations
 213    hash table to get the index into the type vector.)  */
 214
 215 EXTERN struct type **type_vector;
 216
 217 /* Number of elements allocated for type_vector currently.  */
 218
 219 EXTERN int type_vector_length;
 220
 221 /* Initial size of type vector.  Is realloc'd larger if needed, and
 222    realloc'd down to the size actually used, when completed.  */
 223
 224 #define INITIAL_TYPE_VECTOR_LENGTH      160
 225
 226 extern void add_free_pendings (struct pending *list);
 227
 228 extern void add_symbol_to_list (struct symbol *symbol,
 229                                 struct pending **listhead);
 230
 231 extern struct symbol *find_symbol_in_list (struct pending *list,
 232                                            char *name, int length);
 233
 234 extern struct block *finish_block (struct symbol *symbol,
 235                                    struct pending **listhead,
 236                                    struct pending_block *old_blocks,
 237                                    CORE_ADDR start, CORE_ADDR end,
 238                                    struct objfile *objfile);
 239
 240 extern void record_block_range (struct block *,
 241                                 CORE_ADDR start, CORE_ADDR end_inclusive);
 242
 243 extern void really_free_pendings (void *dummy);
 244
 245 extern void start_subfile (char *name, char *dirname);
 246
 247 extern void patch_subfile_names (struct subfile *subfile, char *name);
 248
 249 extern void push_subfile (void);
 250
 251 extern char *pop_subfile (void);
 252
 253 extern struct symtab *end_symtab (CORE_ADDR end_addr,
 254                                   struct objfile *objfile, int section);
 255
 256 /* Defined in stabsread.c.  */
 257
 258 extern void scan_file_globals (struct objfile *objfile);
 259
 260 extern void buildsym_new_init (void);
 261
 262 extern void buildsym_init (void);
 263
 264 extern struct context_stack *push_context (int desc, CORE_ADDR valu);
 265
 266 extern struct context_stack *pop_context (void);
 267
 268 extern void record_line (struct subfile *subfile, int line, CORE_ADDR pc);
 269
 270 extern void start_symtab (char *name, char *dirname, CORE_ADDR start_addr);
 271
 272 extern int hashname (char *name);
 273
 274 extern void free_pending_blocks (void);
 275
 276 /* FIXME: Note that this is used only in buildsym.c and dstread.c,
 277    which should be fixed to not need direct access to
 278    record_pending_block. */
 279
 280 extern void record_pending_block (struct objfile *objfile,
 281                                   struct block *block,
 282                                   struct pending_block *opblock);
 283
 284 extern void record_debugformat (char *format);
 285
 286 extern void record_producer (const char *producer);
 287
 288 extern void merge_symbol_lists (struct pending **srclist,
 289                                 struct pending **targetlist);
 290
 291 /* The macro table for the compilation unit whose symbols we're
 292    currently reading.  All the symtabs for this CU will point to this.  */
 293 EXTERN struct macro_table *pending_macros;
 294
 295 #undef EXTERN
 296
 297 #endif /* defined (BUILDSYM_H) */