gdb/buildsym.h

   1 /* Build symbol tables in GDB's internal format.
   2    Copyright (C) 1986-1991 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 #if !defined (BUILDSYM_H)
  21 #define BUILDSYM_H 1
  22
  23 /* This module provides definitions used for creating and adding to
  24    the symbol table.  These routines are called from various symbol-
  25    file-reading routines.
  26
  27    They originated in dbxread.c of gdb-4.2, and were split out to
  28    make xcoffread.c more maintainable by sharing code.
  29
  30    Variables declared in this file can be defined by #define-ing
  31    the name EXTERN to null.  It is used to declare variables that
  32    are normally extern, but which get defined in a single module
  33    using this technique.  */
  34
  35 #ifndef EXTERN
  36 #define EXTERN extern
  37 #endif
  38
  39 #define HASHSIZE 127    /* Size of things hashed via hashname() */
  40
  41 /* Name of source file whose symbol data we are now processing.
  42    This comes from a symbol of type N_SO. */
  43
  44 EXTERN char *last_source_file;
  45
  46 /* Core address of start of text of current source file.
  47    This too comes from the N_SO symbol. */
  48
  49 EXTERN CORE_ADDR last_source_start_addr;
  50
  51 /* The list of sub-source-files within the current individual compilation.
  52    Each file gets its own symtab with its own linetable and associated info,
  53    but they all share one blockvector.  */
  54
  55 struct subfile
  56 {
  57   struct subfile *next;
  58   char *name;
  59   char *dirname;
  60   struct linetable *line_vector;
  61   int line_vector_length;
  62 };
  63
  64 EXTERN struct subfile *subfiles;
  65
  66 EXTERN struct subfile *current_subfile;
  67
  68 /* Global variable which, when set, indicates that we are processing a
  69    .o file compiled with gcc */
  70
  71 EXTERN unsigned char processing_gcc_compilation;
  72
  73 /* When set, we are processing a .o file compiled by sun acc */
  74
  75 EXTERN unsigned char processing_acc_compilation;
  76
  77 /* Count symbols as they are processed, for error messages.  */
  78
  79 EXTERN unsigned int symnum;
  80
  81 /* Record the symbols defined for each context in a list.
  82    We don't create a struct block for the context until we
  83    know how long to make it.  */
  84
  85 #define PENDINGSIZE 100
  86
  87 struct pending
  88 {
  89   struct pending *next;
  90   int nsyms;
  91   struct symbol *symbol[PENDINGSIZE];
  92 };
  93
  94 /* List of free `struct pending' structures for reuse.  */
  95
  96 EXTERN struct pending *free_pendings;
  97
  98 /* Here are the three lists that symbols are put on.  */
  99
 100 EXTERN struct pending *file_symbols;    /* static at top level, and types */
 101
 102 EXTERN struct pending *global_symbols;  /* global functions and variables */
 103
 104 EXTERN struct pending *local_symbols;   /* everything local to lexic context */
 105
 106 /* Stack representing unclosed lexical contexts
 107    (that will become blocks, eventually).  */
 108
 109 struct context_stack
 110 {
 111   /* Outer locals at the time we entered */
 112
 113   struct pending *locals;
 114
 115   /* Pointer into blocklist as of entry */
 116
 117   struct pending_block *old_blocks;
 118
 119   /* Name of function, if any, defining context*/
 120
 121   struct symbol *name;
 122
 123   /* PC where this context starts */
 124
 125   CORE_ADDR start_addr;
 126
 127   /* Temp slot for exception handling. */
 128
 129   CORE_ADDR end_addr;
 130
 131   /* For error-checking matching push/pop */
 132
 133   int depth;
 134
 135 };
 136
 137 EXTERN struct context_stack *context_stack;
 138
 139 /* Index of first unused entry in context stack.  */
 140
 141 EXTERN int context_stack_depth;
 142
 143 /* Currently allocated size of context stack.  */
 144
 145 EXTERN int context_stack_size;
 146
 147 /* Macro "function" for popping contexts from the stack.  Pushing is done
 148    by a real function, push_context.  This returns a pointer to a struct
 149    context_stack.  */
 150
 151 #define pop_context() (&context_stack[--context_stack_depth]);
 152
 153 /* Nonzero if within a function (so symbols should be local,
 154    if nothing says specifically).  */
 155
 156 EXTERN int within_function;
 157
 158 /* List of blocks already made (lexical contexts already closed).
 159    This is used at the end to make the blockvector.  */
 160
 161 struct pending_block
 162 {
 163   struct pending_block *next;
 164   struct block *block;
 165 };
 166
 167 EXTERN struct pending_block *pending_blocks;
 168
 169 \f
 170 struct subfile_stack
 171 {
 172   struct subfile_stack *next;
 173   char *name;
 174 };
 175
 176 EXTERN struct subfile_stack *subfile_stack;
 177
 178 #define next_symbol_text() (*next_symbol_text_func)()
 179
 180 /* Function to invoke get the next symbol.  Return the symbol name. */
 181
 182 EXTERN char *(*next_symbol_text_func) PARAMS ((void));
 183
 184 /* Vector of types defined so far, indexed by their type numbers.
 185    Used for both stabs and coff.
 186    (In newer sun systems, dbx uses a pair of numbers in parens,
 187     as in "(SUBFILENUM,NUMWITHINSUBFILE)".  Then these numbers must be
 188     translated through the type_translations hash table to get
 189     the index into the type vector.)  */
 190
 191 EXTERN struct type **type_vector;
 192
 193 /* Number of elements allocated for type_vector currently.  */
 194
 195 EXTERN int type_vector_length;
 196
 197 /* Initial size of type vector.  Is realloc'd larger if needed,
 198    and realloc'd down to the size actually used, when completed.  */
 199
 200 #define INITIAL_TYPE_VECTOR_LENGTH      160
 201
 202 extern void
 203 add_symbol_to_list PARAMS ((struct symbol *, struct pending **));
 204
 205 extern struct symbol *
 206 find_symbol_in_list PARAMS ((struct pending *, char *, int));
 207
 208 extern void
 209 finish_block PARAMS ((struct symbol *, struct pending **,
 210                       struct pending_block *, CORE_ADDR, CORE_ADDR,
 211                       struct objfile *));
 212
 213 extern void
 214 really_free_pendings PARAMS ((int foo));
 215
 216 extern void
 217 start_subfile PARAMS ((char *, char *));
 218
 219 extern void
 220 patch_subfile_names PARAMS ((struct subfile *subfile, char *name));
 221
 222 extern void
 223 push_subfile PARAMS ((void));
 224
 225 extern char *
 226 pop_subfile PARAMS ((void));
 227
 228 extern struct symtab *
 229 end_symtab PARAMS ((CORE_ADDR, int, int, struct objfile *));
 230
 231 extern void
 232 scan_file_globals PARAMS ((struct objfile *));
 233
 234 extern void
 235 buildsym_new_init PARAMS ((void));
 236
 237 extern void
 238 buildsym_init PARAMS ((void));
 239
 240 extern struct context_stack *
 241 push_context PARAMS ((int, CORE_ADDR));
 242
 243 extern void
 244 record_line PARAMS ((struct subfile *, int, CORE_ADDR));
 245
 246 extern void
 247 start_symtab PARAMS ((char *, char *, CORE_ADDR));
 248
 249 extern struct partial_symtab *
 250 start_psymtab PARAMS ((struct objfile *, struct section_offsets *, char *,
 251                        CORE_ADDR, int, struct partial_symbol *,
 252                        struct partial_symbol *));
 253
 254 extern void
 255 end_psymtab PARAMS ((struct partial_symtab *, char **, int, int, CORE_ADDR,
 256                      struct partial_symtab **, int));
 257
 258 extern void
 259 process_one_symbol PARAMS ((int, int, CORE_ADDR, char *,
 260                             struct section_offsets *, struct objfile *));
 261 extern int
 262 hashname PARAMS ((char *));
 263
 264 #undef EXTERN
 265
 266 #endif  /* defined (BUILDSYM_H) */