gdb/buildsym.h

   1 /* Build symbol tables in GDB's internal format.
   2    Copyright (C) 1986-2016 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 struct dynamic_prop;
  43
  44 #ifndef EXTERN
  45 #define EXTERN extern
  46 #endif
  47
  48 #define HASHSIZE 127            /* Size of things hashed via
  49                                    hashname().  */
  50
  51 /* Core address of start of text of current source file.  This too
  52    comes from the N_SO symbol.  For Dwarf it typically comes from the
  53    DW_AT_low_pc attribute of a DW_TAG_compile_unit DIE.  */
  54
  55 EXTERN CORE_ADDR last_source_start_addr;
  56
  57 /* The list of sub-source-files within the current individual
  58    compilation.  Each file gets its own symtab with its own linetable
  59    and associated info, but they all share one blockvector.  */
  60
  61 struct subfile
  62 {
  63   struct subfile *next;
  64   /* Space for this is malloc'd.  */
  65   char *name;
  66   /* Space for this is malloc'd.  */
  67   struct linetable *line_vector;
  68   int line_vector_length;
  69   /* The "containing" compunit.  */
  70   struct buildsym_compunit *buildsym_compunit;
  71   enum language language;
  72   struct symtab *symtab;
  73 };
  74
  75 EXTERN struct subfile *current_subfile;
  76
  77 /* Global variable which, when set, indicates that we are processing a
  78    .o file compiled with gcc */
  79
  80 EXTERN unsigned char processing_gcc_compilation;
  81
  82 /* When set, we are processing a .o file compiled by sun acc.  This is
  83    misnamed; it refers to all stabs-in-elf implementations which use
  84    N_UNDF the way Sun does, including Solaris gcc.  Hopefully all
  85    stabs-in-elf implementations ever invented will choose to be
  86    compatible.  */
  87
  88 EXTERN unsigned char processing_acc_compilation;
  89
  90 /* Count symbols as they are processed, for error messages.  */
  91
  92 EXTERN unsigned int symnum;
  93
  94 /* Record the symbols defined for each context in a list.  We don't
  95    create a struct block for the context until we know how long to
  96    make it.  */
  97
  98 #define PENDINGSIZE 100
  99
 100 struct pending
 101   {
 102     struct pending *next;
 103     int nsyms;
 104     struct symbol *symbol[PENDINGSIZE];
 105   };
 106
 107 /* Here are the three lists that symbols are put on.  */
 108
 109 /* static at top level, and types */
 110
 111 EXTERN struct pending *file_symbols;
 112
 113 /* global functions and variables */
 114
 115 EXTERN struct pending *global_symbols;
 116
 117 /* everything local to lexical context */
 118
 119 EXTERN struct pending *local_symbols;
 120
 121 /* "using" directives local to lexical context.  */
 122
 123 EXTERN struct using_direct *local_using_directives;
 124
 125 /* global "using" directives.  */
 126
 127 EXTERN struct using_direct *global_using_directives;
 128
 129 /* Stack representing unclosed lexical contexts (that will become
 130    blocks, eventually).  */
 131
 132 struct context_stack
 133   {
 134     /* Outer locals at the time we entered */
 135
 136     struct pending *locals;
 137
 138     /* Pending using directives at the time we entered.  */
 139
 140     struct using_direct *local_using_directives;
 141
 142     /* Pointer into blocklist as of entry */
 143
 144     struct pending_block *old_blocks;
 145
 146     /* Name of function, if any, defining context */
 147
 148     struct symbol *name;
 149
 150     /* Expression that computes the frame base of the lexically enclosing
 151        function, if any.  NULL otherwise.  */
 152
 153     struct dynamic_prop *static_link;
 154
 155     /* PC where this context starts */
 156
 157     CORE_ADDR start_addr;
 158
 159     /* Temp slot for exception handling.  */
 160
 161     CORE_ADDR end_addr;
 162
 163     /* For error-checking matching push/pop */
 164
 165     int depth;
 166
 167   };
 168
 169 EXTERN struct context_stack *context_stack;
 170
 171 /* Index of first unused entry in context stack.  */
 172
 173 EXTERN int context_stack_depth;
 174
 175 /* Currently allocated size of context stack.  */
 176
 177 EXTERN int context_stack_size;
 178
 179 /* Non-zero if the context stack is empty.  */
 180 #define outermost_context_p() (context_stack_depth == 0)
 181
 182 /* Nonzero if within a function (so symbols should be local, if
 183    nothing says specifically).  */
 184
 185 EXTERN int within_function;
 186
 187 /* The type of the record_line function.  */
 188 typedef void (record_line_ftype) (struct subfile *subfile, int line,
 189                                   CORE_ADDR pc);
 190
 191 \f
 192
 193 #define next_symbol_text(objfile) (*next_symbol_text_func)(objfile)
 194
 195 /* Function to invoke get the next symbol.  Return the symbol name.  */
 196
 197 EXTERN char *(*next_symbol_text_func) (struct objfile *);
 198
 199 extern void add_symbol_to_list (struct symbol *symbol,
 200                                 struct pending **listhead);
 201
 202 extern struct symbol *find_symbol_in_list (struct pending *list,
 203                                            char *name, int length);
 204
 205 extern struct block *finish_block (struct symbol *symbol,
 206                                    struct pending **listhead,
 207                                    struct pending_block *old_blocks,
 208                                    const struct dynamic_prop *static_link,
 209                                    CORE_ADDR start,
 210                                    CORE_ADDR end);
 211
 212 extern void record_block_range (struct block *,
 213                                 CORE_ADDR start, CORE_ADDR end_inclusive);
 214
 215 extern void really_free_pendings (void *dummy);
 216
 217 extern void start_subfile (const char *name);
 218
 219 extern void patch_subfile_names (struct subfile *subfile, char *name);
 220
 221 extern void push_subfile (void);
 222
 223 extern char *pop_subfile (void);
 224
 225 extern struct block *end_symtab_get_static_block (CORE_ADDR end_addr,
 226                                                   int expandable,
 227                                                   int required);
 228
 229 extern struct compunit_symtab *
 230   end_symtab_from_static_block (struct block *static_block,
 231                                 int section, int expandable);
 232
 233 extern struct compunit_symtab *end_symtab (CORE_ADDR end_addr, int section);
 234
 235 extern struct compunit_symtab *end_expandable_symtab (CORE_ADDR end_addr,
 236                                                       int section);
 237
 238 extern void augment_type_symtab (void);
 239
 240 /* Defined in stabsread.c.  */
 241
 242 extern void scan_file_globals (struct objfile *objfile);
 243
 244 extern void buildsym_new_init (void);
 245
 246 extern void buildsym_init (void);
 247
 248 extern struct context_stack *push_context (int desc, CORE_ADDR valu);
 249
 250 extern struct context_stack *pop_context (void);
 251
 252 extern record_line_ftype record_line;
 253
 254 extern struct compunit_symtab *start_symtab (struct objfile *objfile,
 255                                              const char *name,
 256                                              const char *comp_dir,
 257                                              CORE_ADDR start_addr);
 258
 259 extern void restart_symtab (struct compunit_symtab *cust,
 260                             const char *name, CORE_ADDR start_addr);
 261
 262 extern int hashname (const char *name);
 263
 264 extern void free_pending_blocks (void);
 265
 266 /* Record the name of the debug format in the current pending symbol
 267    table.  FORMAT must be a string with a lifetime at least as long as
 268    the symtab's objfile.  */
 269
 270 extern void record_debugformat (const char *format);
 271
 272 /* Record the name of the debuginfo producer (usually the compiler) in
 273    the current pending symbol table.  PRODUCER must be a string with a
 274    lifetime at least as long as the symtab's objfile.  */
 275
 276 extern void record_producer (const char *producer);
 277
 278 extern void merge_symbol_lists (struct pending **srclist,
 279                                 struct pending **targetlist);
 280
 281 /* Set the name of the last source file.  NAME is copied by this
 282    function.  */
 283
 284 extern void set_last_source_file (const char *name);
 285
 286 /* Fetch the name of the last source file.  */
 287
 288 extern const char *get_last_source_file (void);
 289
 290 /* Return the compunit symtab object.
 291    It is only valid to call this between calls to start_symtab and the
 292    end_symtab* functions.  */
 293
 294 extern struct compunit_symtab *buildsym_compunit_symtab (void);
 295
 296 /* Return the macro table.
 297    Initialize it if this is the first use.
 298    It is only valid to call this between calls to start_symtab and the
 299    end_symtab* functions.  */
 300
 301 extern struct macro_table *get_macro_table (void);
 302
 303 #undef EXTERN
 304
 305 #endif /* defined (BUILDSYM_H) */