gdb/buildsym.h

   1 /* Build symbol tables in GDB's internal format.
   2    Copyright (C) 1986-2015 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 3 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, see <http://www.gnu.org/licenses/>.  */
  18
  19 #if !defined (BUILDSYM_H)
  20 #define BUILDSYM_H 1
  21
  22 struct objfile;
  23 struct symbol;
  24 struct addrmap;
  25 struct compunit_symtab;
  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 struct pending_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 /* Core address of start of text of current source file.  This too
  50    comes from the N_SO symbol.  For Dwarf it typically comes from the
  51    DW_AT_low_pc attribute of a DW_TAG_compile_unit DIE.  */
  52
  53 EXTERN CORE_ADDR last_source_start_addr;
  54
  55 /* The list of sub-source-files within the current individual
  56    compilation.  Each file gets its own symtab with its own linetable
  57    and associated info, but they all share one blockvector.  */
  58
  59 struct subfile
  60 {
  61   struct subfile *next;
  62   /* Space for this is malloc'd.  */
  63   char *name;
  64   /* Space for this is malloc'd.  */
  65   struct linetable *line_vector;
  66   int line_vector_length;
  67   /* The "containing" compunit.  */
  68   struct buildsym_compunit *buildsym_compunit;
  69   enum language language;
  70   struct symtab *symtab;
  71 };
  72
  73 EXTERN struct subfile *current_subfile;
  74
  75 /* Global variable which, when set, indicates that we are processing a
  76    .o file compiled with gcc */
  77
  78 EXTERN unsigned char processing_gcc_compilation;
  79
  80 /* When set, we are processing a .o file compiled by sun acc.  This is
  81    misnamed; it refers to all stabs-in-elf implementations which use
  82    N_UNDF the way Sun does, including Solaris gcc.  Hopefully all
  83    stabs-in-elf implementations ever invented will choose to be
  84    compatible.  */
  85
  86 EXTERN unsigned char processing_acc_compilation;
  87
  88 /* Count symbols as they are processed, for error messages.  */
  89
  90 EXTERN unsigned int symnum;
  91
  92 /* Record the symbols defined for each context in a list.  We don't
  93    create a struct block for the context until we know how long to
  94    make it.  */
  95
  96 #define PENDINGSIZE 100
  97
  98 struct pending
  99   {
 100     struct pending *next;
 101     int nsyms;
 102     struct symbol *symbol[PENDINGSIZE];
 103   };
 104
 105 /* Here are the three lists that symbols are put on.  */
 106
 107 /* static at top level, and types */
 108
 109 EXTERN struct pending *file_symbols;
 110
 111 /* global functions and variables */
 112
 113 EXTERN struct pending *global_symbols;
 114
 115 /* everything local to lexical context */
 116
 117 EXTERN struct pending *local_symbols;
 118
 119 /* "using" directives local to lexical context.  */
 120
 121 EXTERN struct using_direct *using_directives;
 122
 123 /* Stack representing unclosed lexical contexts (that will become
 124    blocks, eventually).  */
 125
 126 struct context_stack
 127   {
 128     /* Outer locals at the time we entered */
 129
 130     struct pending *locals;
 131
 132     /* Pending using directives at the time we entered.  */
 133
 134     struct using_direct *using_directives;
 135
 136     /* Pointer into blocklist as of entry */
 137
 138     struct pending_block *old_blocks;
 139
 140     /* Name of function, if any, defining context */
 141
 142     struct symbol *name;
 143
 144     /* PC where this context starts */
 145
 146     CORE_ADDR start_addr;
 147
 148     /* Temp slot for exception handling.  */
 149
 150     CORE_ADDR end_addr;
 151
 152     /* For error-checking matching push/pop */
 153
 154     int depth;
 155
 156   };
 157
 158 EXTERN struct context_stack *context_stack;
 159
 160 /* Index of first unused entry in context stack.  */
 161
 162 EXTERN int context_stack_depth;
 163
 164 /* Currently allocated size of context stack.  */
 165
 166 EXTERN int context_stack_size;
 167
 168 /* Non-zero if the context stack is empty.  */
 169 #define outermost_context_p() (context_stack_depth == 0)
 170
 171 /* Nonzero if within a function (so symbols should be local, if
 172    nothing says specifically).  */
 173
 174 EXTERN int within_function;
 175
 176 /* The type of the record_line function.  */
 177 typedef void (record_line_ftype) (struct subfile *subfile, int line,
 178                                   CORE_ADDR pc);
 179
 180 \f
 181
 182 #define next_symbol_text(objfile) (*next_symbol_text_func)(objfile)
 183
 184 /* Function to invoke get the next symbol.  Return the symbol name.  */
 185
 186 EXTERN char *(*next_symbol_text_func) (struct objfile *);
 187
 188 extern void add_symbol_to_list (struct symbol *symbol,
 189                                 struct pending **listhead);
 190
 191 extern struct symbol *find_symbol_in_list (struct pending *list,
 192                                            char *name, int length);
 193
 194 extern struct block *finish_block (struct symbol *symbol,
 195                                    struct pending **listhead,
 196                                    struct pending_block *old_blocks,
 197                                    CORE_ADDR start, CORE_ADDR end);
 198
 199 extern void record_block_range (struct block *,
 200                                 CORE_ADDR start, CORE_ADDR end_inclusive);
 201
 202 extern void really_free_pendings (void *dummy);
 203
 204 extern void start_subfile (const char *name);
 205
 206 extern void patch_subfile_names (struct subfile *subfile, char *name);
 207
 208 extern void push_subfile (void);
 209
 210 extern char *pop_subfile (void);
 211
 212 extern struct block *end_symtab_get_static_block (CORE_ADDR end_addr,
 213                                                   int expandable,
 214                                                   int required);
 215
 216 extern struct compunit_symtab *
 217   end_symtab_from_static_block (struct block *static_block,
 218                                 int section, int expandable);
 219
 220 extern struct compunit_symtab *end_symtab (CORE_ADDR end_addr, int section);
 221
 222 extern struct compunit_symtab *end_expandable_symtab (CORE_ADDR end_addr,
 223                                                       int section);
 224
 225 extern void augment_type_symtab (void);
 226
 227 /* Defined in stabsread.c.  */
 228
 229 extern void scan_file_globals (struct objfile *objfile);
 230
 231 extern void buildsym_new_init (void);
 232
 233 extern void buildsym_init (void);
 234
 235 extern struct context_stack *push_context (int desc, CORE_ADDR valu);
 236
 237 extern struct context_stack *pop_context (void);
 238
 239 extern record_line_ftype record_line;
 240
 241 extern struct compunit_symtab *start_symtab (struct objfile *objfile,
 242                                              const char *name,
 243                                              const char *comp_dir,
 244                                              CORE_ADDR start_addr);
 245
 246 extern void restart_symtab (struct compunit_symtab *cust,
 247                             const char *name, CORE_ADDR start_addr);
 248
 249 extern int hashname (const char *name);
 250
 251 extern void free_pending_blocks (void);
 252
 253 /* Record the name of the debug format in the current pending symbol
 254    table.  FORMAT must be a string with a lifetime at least as long as
 255    the symtab's objfile.  */
 256
 257 extern void record_debugformat (const char *format);
 258
 259 /* Record the name of the debuginfo producer (usually the compiler) in
 260    the current pending symbol table.  PRODUCER must be a string with a
 261    lifetime at least as long as the symtab's objfile.  */
 262
 263 extern void record_producer (const char *producer);
 264
 265 extern void merge_symbol_lists (struct pending **srclist,
 266                                 struct pending **targetlist);
 267
 268 /* Set the name of the last source file.  NAME is copied by this
 269    function.  */
 270
 271 extern void set_last_source_file (const char *name);
 272
 273 /* Fetch the name of the last source file.  */
 274
 275 extern const char *get_last_source_file (void);
 276
 277 /* Return the compunit symtab object.
 278    It is only valid to call this between calls to start_symtab and the
 279    end_symtab* functions.  */
 280
 281 extern struct compunit_symtab *buildsym_compunit_symtab (void);
 282
 283 /* Return the macro table.
 284    Initialize it if this is the first use.
 285    It is only valid to call this between calls to start_symtab and the
 286    end_symtab* functions.  */
 287
 288 extern struct macro_table *get_macro_table (void);
 289
 290 #undef EXTERN
 291
 292 #endif /* defined (BUILDSYM_H) */