gdb/buildsym.h

   1 /* Build symbol tables in GDB's internal format.
   2    Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1995, 1996,
   3    1997, 1998, 1999, 2000, 2002, 2003 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 2 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, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #if !defined (BUILDSYM_H)
  23 #define BUILDSYM_H 1
  24
  25 struct objfile;
  26 struct symbol;
  27
  28 /* This module provides definitions used for creating and adding to
  29    the symbol table.  These routines are called from various symbol-
  30    file-reading routines.
  31
  32    They originated in dbxread.c of gdb-4.2, and were split out to
  33    make xcoffread.c more maintainable by sharing code.
  34
  35    Variables declared in this file can be defined by #define-ing the
  36    name EXTERN to null.  It is used to declare variables that are
  37    normally extern, but which get defined in a single module using
  38    this technique.  */
  39
  40 struct block;
  41
  42 #ifndef EXTERN
  43 #define EXTERN extern
  44 #endif
  45
  46 #define HASHSIZE 127            /* Size of things hashed via
  47                                    hashname() */
  48
  49 /* Name of source file whose symbol data we are now processing.  This
  50    comes from a symbol of type N_SO. */
  51
  52 EXTERN char *last_source_file;
  53
  54 /* Core address of start of text of current source file.  This too
  55    comes from the N_SO symbol. */
  56
  57 EXTERN CORE_ADDR last_source_start_addr;
  58
  59 /* The list of sub-source-files within the current individual
  60    compilation.  Each file gets its own symtab with its own linetable
  61    and associated info, but they all share one blockvector.  */
  62
  63 struct subfile
  64   {
  65     struct subfile *next;
  66     char *name;
  67     char *dirname;
  68     struct linetable *line_vector;
  69     int line_vector_length;
  70     enum language language;
  71     char *debugformat;
  72   };
  73
  74 EXTERN struct subfile *subfiles;
  75
  76 EXTERN struct subfile *current_subfile;
  77
  78 /* Global variable which, when set, indicates that we are processing a
  79    .o file compiled with gcc */
  80
  81 EXTERN unsigned char processing_gcc_compilation;
  82
  83 /* When set, we are processing a .o file compiled by sun acc.  This is
  84    misnamed; it refers to all stabs-in-elf implementations which use
  85    N_UNDF the way Sun does, including Solaris gcc.  Hopefully all
  86    stabs-in-elf implementations ever invented will choose to be
  87    compatible.  */
  88
  89 EXTERN unsigned char processing_acc_compilation;
  90
  91 /* Count symbols as they are processed, for error messages.  */
  92
  93 EXTERN unsigned int symnum;
  94
  95 /* Record the symbols defined for each context in a list.  We don't
  96    create a struct block for the context until we know how long to
  97    make it.  */
  98
  99 #define PENDINGSIZE 100
 100
 101 struct pending
 102   {
 103     struct pending *next;
 104     int nsyms;
 105     struct symbol *symbol[PENDINGSIZE];
 106   };
 107
 108 /* Here are the three lists that symbols are put on.  */
 109
 110 /* static at top level, and types */
 111
 112 EXTERN struct pending *file_symbols;
 113
 114 /* global functions and variables */
 115
 116 EXTERN struct pending *global_symbols;
 117
 118 /* everything local to lexical context */
 119
 120 EXTERN struct pending *local_symbols;
 121
 122 /* func params local to lexical  context */
 123
 124 EXTERN struct pending *param_symbols;
 125
 126 /* Stack representing unclosed lexical contexts (that will become
 127    blocks, eventually).  */
 128
 129 struct context_stack
 130   {
 131     /* Outer locals at the time we entered */
 132
 133     struct pending *locals;
 134
 135     /* Pending func params at the time we entered */
 136
 137     struct pending *params;
 138
 139     /* Pointer into blocklist as of entry */
 140
 141     struct pending_block *old_blocks;
 142
 143     /* Name of function, if any, defining context */
 144
 145     struct symbol *name;
 146
 147     /* PC where this context starts */
 148
 149     CORE_ADDR start_addr;
 150
 151     /* Temp slot for exception handling. */
 152
 153     CORE_ADDR end_addr;
 154
 155     /* For error-checking matching push/pop */
 156
 157     int depth;
 158
 159   };
 160
 161 EXTERN struct context_stack *context_stack;
 162
 163 /* Index of first unused entry in context stack.  */
 164
 165 EXTERN int context_stack_depth;
 166
 167 /* Currently allocated size of context stack.  */
 168
 169 EXTERN int context_stack_size;
 170
 171 /* Non-zero if the context stack is empty.  */
 172 #define outermost_context_p() (context_stack_depth == 0)
 173
 174 /* Nonzero if within a function (so symbols should be local, if
 175    nothing says specifically).  */
 176
 177 EXTERN int within_function;
 178
 179 /* List of blocks already made (lexical contexts already closed).
 180    This is used at the end to make the blockvector.  */
 181
 182 struct pending_block
 183   {
 184     struct pending_block *next;
 185     struct block *block;
 186   };
 187
 188 /* Pointer to the head of a linked list of symbol blocks which have
 189    already been finalized (lexical contexts already closed) and which
 190    are just waiting to be built into a blockvector when finalizing the
 191    associated symtab. */
 192
 193 EXTERN struct pending_block *pending_blocks;
 194 \f
 195
 196 struct subfile_stack
 197   {
 198     struct subfile_stack *next;
 199     char *name;
 200   };
 201
 202 EXTERN struct subfile_stack *subfile_stack;
 203
 204 #define next_symbol_text(objfile) (*next_symbol_text_func)(objfile)
 205
 206 /* Function to invoke get the next symbol.  Return the symbol name. */
 207
 208 EXTERN char *(*next_symbol_text_func) (struct objfile *);
 209
 210 /* Vector of types defined so far, indexed by their type numbers.
 211    Used for both stabs and coff.  (In newer sun systems, dbx uses a
 212    pair of numbers in parens, as in "(SUBFILENUM,NUMWITHINSUBFILE)".
 213    Then these numbers must be translated through the type_translations
 214    hash table to get the index into the type vector.)  */
 215
 216 EXTERN struct type **type_vector;
 217
 218 /* Number of elements allocated for type_vector currently.  */
 219
 220 EXTERN int type_vector_length;
 221
 222 /* Initial size of type vector.  Is realloc'd larger if needed, and
 223    realloc'd down to the size actually used, when completed.  */
 224
 225 #define INITIAL_TYPE_VECTOR_LENGTH      160
 226
 227 extern void add_free_pendings (struct pending *list);
 228
 229 extern void add_symbol_to_list (struct symbol *symbol,
 230                                 struct pending **listhead);
 231
 232 extern struct symbol *find_symbol_in_list (struct pending *list,
 233                                            char *name, int length);
 234
 235 extern void finish_block (struct symbol *symbol,
 236                           struct pending **listhead,
 237                           struct pending_block *old_blocks,
 238                           CORE_ADDR start, CORE_ADDR end,
 239                           struct objfile *objfile);
 240
 241 extern void really_free_pendings (void *dummy);
 242
 243 extern void start_subfile (char *name, char *dirname);
 244
 245 extern void patch_subfile_names (struct subfile *subfile, char *name);
 246
 247 extern void push_subfile (void);
 248
 249 extern char *pop_subfile (void);
 250
 251 extern struct symtab *end_symtab (CORE_ADDR end_addr,
 252                                   struct objfile *objfile, int section);
 253
 254 /* Defined in stabsread.c.  */
 255
 256 extern void scan_file_globals (struct objfile *objfile);
 257
 258 extern void buildsym_new_init (void);
 259
 260 extern void buildsym_init (void);
 261
 262 extern struct context_stack *push_context (int desc, CORE_ADDR valu);
 263
 264 extern struct context_stack *pop_context (void);
 265
 266 extern void record_line (struct subfile *subfile, int line, CORE_ADDR pc);
 267
 268 extern void start_symtab (char *name, char *dirname, CORE_ADDR start_addr);
 269
 270 extern int hashname (char *name);
 271
 272 extern void free_pending_blocks (void);
 273
 274 /* FIXME: Note that this is used only in buildsym.c and dstread.c,
 275    which should be fixed to not need direct access to
 276    record_pending_block. */
 277
 278 extern void record_pending_block (struct objfile *objfile,
 279                                   struct block *block,
 280                                   struct pending_block *opblock);
 281
 282 extern void record_debugformat (char *format);
 283
 284 extern void merge_symbol_lists (struct pending **srclist,
 285                                 struct pending **targetlist);
 286
 287 /* The macro table for the compilation unit whose symbols we're
 288    currently reading.  All the symtabs for this CU will point to this.  */
 289 EXTERN struct macro_table *pending_macros;
 290
 291 #undef EXTERN
 292
 293 #endif /* defined (BUILDSYM_H) */