gdb/buildsym.h

   1 /* Build symbol tables in GDB's internal format.
   2    Copyright (C) 1986-1993, 1995-2000, 2002-2003, 2007-2012 Free
   3    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 for stabs.  For Dwarf it comes
  50    from the DW_AT_name attribute of a DW_TAG_compile_unit DIE.  */
  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.  For Dwarf it typically comes from the
  56    DW_AT_low_pc attribute of a DW_TAG_compile_unit DIE.  */
  57
  58 EXTERN CORE_ADDR last_source_start_addr;
  59
  60 /* The list of sub-source-files within the current individual
  61    compilation.  Each file gets its own symtab with its own linetable
  62    and associated info, but they all share one blockvector.  */
  63
  64 struct subfile
  65   {
  66     struct subfile *next;
  67     char *name;
  68     char *dirname;
  69     struct linetable *line_vector;
  70     int line_vector_length;
  71     enum language language;
  72     const char *producer;
  73     const char *debugformat;
  74     struct symtab *symtab;
  75   };
  76
  77 EXTERN struct subfile *current_subfile;
  78
  79 /* Global variable which, when set, indicates that we are processing a
  80    .o file compiled with gcc */
  81
  82 EXTERN unsigned char processing_gcc_compilation;
  83
  84 /* When set, we are processing a .o file compiled by sun acc.  This is
  85    misnamed; it refers to all stabs-in-elf implementations which use
  86    N_UNDF the way Sun does, including Solaris gcc.  Hopefully all
  87    stabs-in-elf implementations ever invented will choose to be
  88    compatible.  */
  89
  90 EXTERN unsigned char processing_acc_compilation;
  91
  92 /* Count symbols as they are processed, for error messages.  */
  93
  94 EXTERN unsigned int symnum;
  95
  96 /* Record the symbols defined for each context in a list.  We don't
  97    create a struct block for the context until we know how long to
  98    make it.  */
  99
 100 #define PENDINGSIZE 100
 101
 102 struct pending
 103   {
 104     struct pending *next;
 105     int nsyms;
 106     struct symbol *symbol[PENDINGSIZE];
 107   };
 108
 109 /* Here are the three lists that symbols are put on.  */
 110
 111 /* static at top level, and types */
 112
 113 EXTERN struct pending *file_symbols;
 114
 115 /* global functions and variables */
 116
 117 EXTERN struct pending *global_symbols;
 118
 119 /* everything local to lexical context */
 120
 121 EXTERN struct pending *local_symbols;
 122
 123 /* "using" directives local to lexical context.  */
 124
 125 EXTERN struct using_direct *using_directives;
 126
 127 /* Stack representing unclosed lexical contexts (that will become
 128    blocks, eventually).  */
 129
 130 struct context_stack
 131   {
 132     /* Outer locals at the time we entered */
 133
 134     struct pending *locals;
 135
 136     /* Pending using directives at the time we entered.  */
 137
 138     struct using_direct *using_directives;
 139
 140     /* Pointer into blocklist as of entry */
 141
 142     struct pending_block *old_blocks;
 143
 144     /* Name of function, if any, defining context */
 145
 146     struct symbol *name;
 147
 148     /* PC where this context starts */
 149
 150     CORE_ADDR start_addr;
 151
 152     /* Temp slot for exception handling.  */
 153
 154     CORE_ADDR end_addr;
 155
 156     /* For error-checking matching push/pop */
 157
 158     int depth;
 159
 160   };
 161
 162 EXTERN struct context_stack *context_stack;
 163
 164 /* Index of first unused entry in context stack.  */
 165
 166 EXTERN int context_stack_depth;
 167
 168 /* Currently allocated size of context stack.  */
 169
 170 EXTERN int context_stack_size;
 171
 172 /* Non-zero if the context stack is empty.  */
 173 #define outermost_context_p() (context_stack_depth == 0)
 174
 175 /* Nonzero if within a function (so symbols should be local, if
 176    nothing says specifically).  */
 177
 178 EXTERN int within_function;
 179
 180 /* List of blocks already made (lexical contexts already closed).
 181    This is used at the end to make the blockvector.  */
 182
 183 struct pending_block
 184   {
 185     struct pending_block *next;
 186     struct block *block;
 187   };
 188
 189 /* Pointer to the head of a linked list of symbol blocks which have
 190    already been finalized (lexical contexts already closed) and which
 191    are just waiting to be built into a blockvector when finalizing the
 192    associated symtab.  */
 193
 194 EXTERN struct pending_block *pending_blocks;
 195 \f
 196
 197 struct subfile_stack
 198   {
 199     struct subfile_stack *next;
 200     char *name;
 201   };
 202
 203 EXTERN struct subfile_stack *subfile_stack;
 204
 205 #define next_symbol_text(objfile) (*next_symbol_text_func)(objfile)
 206
 207 /* Function to invoke get the next symbol.  Return the symbol name.  */
 208
 209 EXTERN char *(*next_symbol_text_func) (struct objfile *);
 210
 211 /* Vector of types defined so far, indexed by their type numbers.
 212    Used for both stabs and coff.  (In newer sun systems, dbx uses a
 213    pair of numbers in parens, as in "(SUBFILENUM,NUMWITHINSUBFILE)".
 214    Then these numbers must be translated through the type_translations
 215    hash table to get the index into the type vector.)  */
 216
 217 EXTERN struct type **type_vector;
 218
 219 /* Number of elements allocated for type_vector currently.  */
 220
 221 EXTERN int type_vector_length;
 222
 223 /* Initial size of type vector.  Is realloc'd larger if needed, and
 224    realloc'd down to the size actually used, when completed.  */
 225
 226 #define INITIAL_TYPE_VECTOR_LENGTH      160
 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 (const char *name, const 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 block *end_symtab_get_static_block (CORE_ADDR end_addr,
 254                                                   struct objfile *objfile,
 255                                                   int expandable,
 256                                                   int required);
 257
 258 extern struct symtab *end_symtab_from_static_block (struct block *static_block,
 259                                                     struct objfile *objfile,
 260                                                     int section,
 261                                                     int expandable);
 262
 263 extern struct symtab *end_symtab (CORE_ADDR end_addr,
 264                                   struct objfile *objfile, int section);
 265
 266 extern struct symtab *end_expandable_symtab (CORE_ADDR end_addr,
 267                                              struct objfile *objfile,
 268                                              int section);
 269
 270 extern void augment_type_symtab (struct objfile *objfile,
 271                                  struct symtab *primary_symtab);
 272
 273 /* Defined in stabsread.c.  */
 274
 275 extern void scan_file_globals (struct objfile *objfile);
 276
 277 extern void buildsym_new_init (void);
 278
 279 extern void buildsym_init (void);
 280
 281 extern struct context_stack *push_context (int desc, CORE_ADDR valu);
 282
 283 extern struct context_stack *pop_context (void);
 284
 285 extern void record_line (struct subfile *subfile, int line, CORE_ADDR pc);
 286
 287 extern void start_symtab (char *name, char *dirname, CORE_ADDR start_addr);
 288
 289 extern void restart_symtab (CORE_ADDR start_addr);
 290
 291 extern int hashname (const char *name);
 292
 293 extern void free_pending_blocks (void);
 294
 295 /* Record the name of the debug format in the current pending symbol
 296    table.  FORMAT must be a string with a lifetime at least as long as
 297    the symtab's objfile.  */
 298
 299 extern void record_debugformat (const char *format);
 300
 301 /* Record the name of the debuginfo producer (usually the compiler) in
 302    the current pending symbol table.  PRODUCER must be a string with a
 303    lifetime at least as long as the symtab's objfile.  */
 304
 305 extern void record_producer (const char *producer);
 306
 307 extern void merge_symbol_lists (struct pending **srclist,
 308                                 struct pending **targetlist);
 309
 310 /* The macro table for the compilation unit whose symbols we're
 311    currently reading.  All the symtabs for this CU will point to
 312    this.  */
 313 EXTERN struct macro_table *pending_macros;
 314
 315 #undef EXTERN
 316
 317 #endif /* defined (BUILDSYM_H) */