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, 2008, 2009
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #if !defined (BUILDSYM_H)
  22 #define BUILDSYM_H 1
  23
  24 struct objfile;
  25 struct symbol;
  26 struct addrmap;
  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 for stabs.  For Dwarf it comes from the
  51    DW_AT_name attribute of a DW_TAG_compile_unit DIE.  */
  52
  53 EXTERN char *last_source_file;
  54
  55 /* Core address of start of text of current source file.  This too
  56    comes from the N_SO symbol.  For Dwarf it typically comes from the
  57    DW_AT_low_pc attribute of a DW_TAG_compile_unit DIE.  */
  58
  59 EXTERN CORE_ADDR last_source_start_addr;
  60
  61 /* The list of sub-source-files within the current individual
  62    compilation.  Each file gets its own symtab with its own linetable
  63    and associated info, but they all share one blockvector.  */
  64
  65 struct subfile
  66   {
  67     struct subfile *next;
  68     char *name;
  69     char *dirname;
  70     struct linetable *line_vector;
  71     int line_vector_length;
  72     enum language language;
  73     char *producer;
  74     char *debugformat;
  75     struct symtab *symtab;
  76   };
  77
  78 EXTERN struct subfile *current_subfile;
  79
  80 /* Global variable which, when set, indicates that we are processing a
  81    .o file compiled with gcc */
  82
  83 EXTERN unsigned char processing_gcc_compilation;
  84
  85 /* When set, we are processing a .o file compiled by sun acc.  This is
  86    misnamed; it refers to all stabs-in-elf implementations which use
  87    N_UNDF the way Sun does, including Solaris gcc.  Hopefully all
  88    stabs-in-elf implementations ever invented will choose to be
  89    compatible.  */
  90
  91 EXTERN unsigned char processing_acc_compilation;
  92
  93 /* Count symbols as they are processed, for error messages.  */
  94
  95 EXTERN unsigned int symnum;
  96
  97 /* Record the symbols defined for each context in a list.  We don't
  98    create a struct block for the context until we know how long to
  99    make it.  */
 100
 101 #define PENDINGSIZE 100
 102
 103 struct pending
 104   {
 105     struct pending *next;
 106     int nsyms;
 107     struct symbol *symbol[PENDINGSIZE];
 108   };
 109
 110 /* Here are the three lists that symbols are put on.  */
 111
 112 /* static at top level, and types */
 113
 114 EXTERN struct pending *file_symbols;
 115
 116 /* global functions and variables */
 117
 118 EXTERN struct pending *global_symbols;
 119
 120 /* everything local to lexical context */
 121
 122 EXTERN struct pending *local_symbols;
 123
 124 /* func params local to lexical  context */
 125
 126 EXTERN struct pending *param_symbols;
 127
 128 /* Stack representing unclosed lexical contexts (that will become
 129    blocks, eventually).  */
 130
 131 struct context_stack
 132   {
 133     /* Outer locals at the time we entered */
 134
 135     struct pending *locals;
 136
 137     /* Pending func params at the time we entered */
 138
 139     struct pending *params;
 140
 141     /* Pointer into blocklist as of entry */
 142
 143     struct pending_block *old_blocks;
 144
 145     /* Name of function, if any, defining context */
 146
 147     struct symbol *name;
 148
 149     /* PC where this context starts */
 150
 151     CORE_ADDR start_addr;
 152
 153     /* Temp slot for exception handling. */
 154
 155     CORE_ADDR end_addr;
 156
 157     /* For error-checking matching push/pop */
 158
 159     int depth;
 160
 161   };
 162
 163 EXTERN struct context_stack *context_stack;
 164
 165 /* Index of first unused entry in context stack.  */
 166
 167 EXTERN int context_stack_depth;
 168
 169 /* Currently allocated size of context stack.  */
 170
 171 EXTERN int context_stack_size;
 172
 173 /* Non-zero if the context stack is empty.  */
 174 #define outermost_context_p() (context_stack_depth == 0)
 175
 176 /* Nonzero if within a function (so symbols should be local, if
 177    nothing says specifically).  */
 178
 179 EXTERN int within_function;
 180
 181 /* List of blocks already made (lexical contexts already closed).
 182    This is used at the end to make the blockvector.  */
 183
 184 struct pending_block
 185   {
 186     struct pending_block *next;
 187     struct block *block;
 188   };
 189
 190 /* Pointer to the head of a linked list of symbol blocks which have
 191    already been finalized (lexical contexts already closed) and which
 192    are just waiting to be built into a blockvector when finalizing the
 193    associated symtab. */
 194
 195 EXTERN struct pending_block *pending_blocks;
 196 \f
 197
 198 struct subfile_stack
 199   {
 200     struct subfile_stack *next;
 201     char *name;
 202   };
 203
 204 EXTERN struct subfile_stack *subfile_stack;
 205
 206 #define next_symbol_text(objfile) (*next_symbol_text_func)(objfile)
 207
 208 /* Function to invoke get the next symbol.  Return the symbol name. */
 209
 210 EXTERN char *(*next_symbol_text_func) (struct objfile *);
 211
 212 /* Vector of types defined so far, indexed by their type numbers.
 213    Used for both stabs and coff.  (In newer sun systems, dbx uses a
 214    pair of numbers in parens, as in "(SUBFILENUM,NUMWITHINSUBFILE)".
 215    Then these numbers must be translated through the type_translations
 216    hash table to get the index into the type vector.)  */
 217
 218 EXTERN struct type **type_vector;
 219
 220 /* Number of elements allocated for type_vector currently.  */
 221
 222 EXTERN int type_vector_length;
 223
 224 /* Initial size of type vector.  Is realloc'd larger if needed, and
 225    realloc'd down to the size actually used, when completed.  */
 226
 227 #define INITIAL_TYPE_VECTOR_LENGTH      160
 228
 229 extern void add_free_pendings (struct pending *list);
 230
 231 extern void add_symbol_to_list (struct symbol *symbol,
 232                                 struct pending **listhead);
 233
 234 extern struct symbol *find_symbol_in_list (struct pending *list,
 235                                            char *name, int length);
 236
 237 extern struct block *finish_block (struct symbol *symbol,
 238                                    struct pending **listhead,
 239                                    struct pending_block *old_blocks,
 240                                    CORE_ADDR start, CORE_ADDR end,
 241                                    struct objfile *objfile);
 242
 243 extern void record_block_range (struct block *,
 244                                 CORE_ADDR start, CORE_ADDR end_inclusive);
 245
 246 extern void really_free_pendings (void *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 struct context_stack *pop_context (void);
 270
 271 extern void record_line (struct subfile *subfile, int line, CORE_ADDR pc);
 272
 273 extern void start_symtab (char *name, char *dirname, CORE_ADDR start_addr);
 274
 275 extern int hashname (char *name);
 276
 277 extern void free_pending_blocks (void);
 278
 279 /* FIXME: Note that this is used only in buildsym.c and dstread.c,
 280    which should be fixed to not need direct access to
 281    record_pending_block. */
 282
 283 extern void record_pending_block (struct objfile *objfile,
 284                                   struct block *block,
 285                                   struct pending_block *opblock);
 286
 287 extern void record_debugformat (char *format);
 288
 289 extern void record_producer (const char *producer);
 290
 291 extern void merge_symbol_lists (struct pending **srclist,
 292                                 struct pending **targetlist);
 293
 294 /* The macro table for the compilation unit whose symbols we're
 295    currently reading.  All the symtabs for this CU will point to this.  */
 296 EXTERN struct macro_table *pending_macros;
 297
 298 #undef EXTERN
 299
 300 #endif /* defined (BUILDSYM_H) */