gdb/buildsym.h

   1 /* Build symbol tables in GDB's internal format.
   2    Copyright (C) 1986-2018 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 enum language;
  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 struct pending_block;
  42
  43 struct dynamic_prop;
  44
  45 #ifndef EXTERN
  46 #define EXTERN extern
  47 #endif
  48
  49 #define HASHSIZE 127            /* Size of things hashed via
  50                                    hashname().  */
  51
  52 /* The list of sub-source-files within the current individual
  53    compilation.  Each file gets its own symtab with its own linetable
  54    and associated info, but they all share one blockvector.  */
  55
  56 struct subfile
  57 {
  58   struct subfile *next;
  59   /* Space for this is malloc'd.  */
  60   char *name;
  61   /* Space for this is malloc'd.  */
  62   struct linetable *line_vector;
  63   int line_vector_length;
  64   /* The "containing" compunit.  */
  65   struct buildsym_compunit *buildsym_compunit;
  66   enum language language;
  67   struct symtab *symtab;
  68 };
  69
  70 EXTERN struct subfile *current_subfile;
  71
  72 /* Global variable which, when set, indicates that we are processing a
  73    .o file compiled with gcc */
  74
  75 EXTERN unsigned char processing_gcc_compilation;
  76
  77 /* When set, we are processing a .o file compiled by sun acc.  This is
  78    misnamed; it refers to all stabs-in-elf implementations which use
  79    N_UNDF the way Sun does, including Solaris gcc.  Hopefully all
  80    stabs-in-elf implementations ever invented will choose to be
  81    compatible.  */
  82
  83 EXTERN unsigned char processing_acc_compilation;
  84
  85 /* Count symbols as they are processed, for error messages.  */
  86
  87 EXTERN unsigned int symnum;
  88
  89 /* Record the symbols defined for each context in a list.  We don't
  90    create a struct block for the context until we know how long to
  91    make it.  */
  92
  93 #define PENDINGSIZE 100
  94
  95 struct pending
  96   {
  97     struct pending *next;
  98     int nsyms;
  99     struct symbol *symbol[PENDINGSIZE];
 100   };
 101
 102 /* Here are the three lists that symbols are put on.  */
 103
 104 /* static at top level, and types */
 105
 106 EXTERN struct pending *file_symbols;
 107
 108 /* global functions and variables */
 109
 110 EXTERN struct pending *global_symbols;
 111
 112 /* everything local to lexical context */
 113
 114 EXTERN struct pending *local_symbols;
 115
 116 /* "using" directives local to lexical context.  */
 117
 118 EXTERN struct using_direct *local_using_directives;
 119
 120 /* global "using" directives.  */
 121
 122 EXTERN struct using_direct *global_using_directives;
 123
 124 /* Stack representing unclosed lexical contexts (that will become
 125    blocks, eventually).  */
 126
 127 struct context_stack
 128   {
 129     /* Outer locals at the time we entered */
 130
 131     struct pending *locals;
 132
 133     /* Pending using directives at the time we entered.  */
 134
 135     struct using_direct *local_using_directives;
 136
 137     /* Pointer into blocklist as of entry */
 138
 139     struct pending_block *old_blocks;
 140
 141     /* Name of function, if any, defining context */
 142
 143     struct symbol *name;
 144
 145     /* Expression that computes the frame base of the lexically enclosing
 146        function, if any.  NULL otherwise.  */
 147
 148     struct dynamic_prop *static_link;
 149
 150     /* PC where this context starts */
 151
 152     CORE_ADDR start_addr;
 153
 154     /* Temp slot for exception handling.  */
 155
 156     CORE_ADDR end_addr;
 157
 158     /* For error-checking matching push/pop */
 159
 160     int depth;
 161
 162   };
 163
 164 EXTERN struct context_stack *context_stack;
 165
 166 /* Index of first unused entry in context stack.  */
 167
 168 EXTERN int context_stack_depth;
 169
 170 /* Currently allocated size of context stack.  */
 171
 172 EXTERN int context_stack_size;
 173
 174 /* Non-zero if the context stack is empty.  */
 175 #define outermost_context_p() (context_stack_depth == 0)
 176
 177 /* Nonzero if within a function (so symbols should be local, if
 178    nothing says specifically).  */
 179
 180 EXTERN int within_function;
 181
 182 /* The type of the record_line function.  */
 183 typedef void (record_line_ftype) (struct subfile *subfile, int line,
 184                                   CORE_ADDR pc);
 185
 186 \f
 187
 188 #define next_symbol_text(objfile) (*next_symbol_text_func)(objfile)
 189
 190 /* Function to invoke get the next symbol.  Return the symbol name.  */
 191
 192 EXTERN const char *(*next_symbol_text_func) (struct objfile *);
 193
 194 extern void add_symbol_to_list (struct symbol *symbol,
 195                                 struct pending **listhead);
 196
 197 extern struct symbol *find_symbol_in_list (struct pending *list,
 198                                            char *name, int length);
 199
 200 extern struct block *finish_block (struct symbol *symbol,
 201                                    struct pending **listhead,
 202                                    struct pending_block *old_blocks,
 203                                    const struct dynamic_prop *static_link,
 204                                    CORE_ADDR start,
 205                                    CORE_ADDR end);
 206
 207 extern void record_block_range (struct block *,
 208                                 CORE_ADDR start, CORE_ADDR end_inclusive);
 209
 210 class scoped_free_pendings
 211 {
 212 public:
 213
 214   scoped_free_pendings () = default;
 215   ~scoped_free_pendings ();
 216
 217   DISABLE_COPY_AND_ASSIGN (scoped_free_pendings);
 218 };
 219
 220 extern void start_subfile (const char *name);
 221
 222 extern void patch_subfile_names (struct subfile *subfile, const char *name);
 223
 224 extern void push_subfile (void);
 225
 226 extern char *pop_subfile (void);
 227
 228 extern struct block *end_symtab_get_static_block (CORE_ADDR end_addr,
 229                                                   int expandable,
 230                                                   int required);
 231
 232 extern struct compunit_symtab *
 233   end_symtab_from_static_block (struct block *static_block,
 234                                 int section, int expandable);
 235
 236 extern struct compunit_symtab *end_symtab (CORE_ADDR end_addr, int section);
 237
 238 extern struct compunit_symtab *end_expandable_symtab (CORE_ADDR end_addr,
 239                                                       int section);
 240
 241 extern void augment_type_symtab (void);
 242
 243 /* Defined in stabsread.c.  */
 244
 245 extern void scan_file_globals (struct objfile *objfile);
 246
 247 extern void buildsym_new_init (void);
 248
 249 extern void buildsym_init (void);
 250
 251 extern struct context_stack *push_context (int desc, CORE_ADDR valu);
 252
 253 extern struct context_stack *pop_context (void);
 254
 255 extern record_line_ftype record_line;
 256
 257 extern struct compunit_symtab *start_symtab (struct objfile *objfile,
 258                                              const char *name,
 259                                              const char *comp_dir,
 260                                              CORE_ADDR start_addr,
 261                                              enum language language);
 262
 263 extern void restart_symtab (struct compunit_symtab *cust,
 264                             const char *name, CORE_ADDR start_addr);
 265
 266 extern int hashname (const char *name);
 267
 268 extern void free_pending_blocks (void);
 269
 270 /* Record the name of the debug format in the current pending symbol
 271    table.  FORMAT must be a string with a lifetime at least as long as
 272    the symtab's objfile.  */
 273
 274 extern void record_debugformat (const char *format);
 275
 276 /* Record the name of the debuginfo producer (usually the compiler) in
 277    the current pending symbol table.  PRODUCER must be a string with a
 278    lifetime at least as long as the symtab's objfile.  */
 279
 280 extern void record_producer (const char *producer);
 281
 282 extern void merge_symbol_lists (struct pending **srclist,
 283                                 struct pending **targetlist);
 284
 285 /* Set the name of the last source file.  NAME is copied by this
 286    function.  */
 287
 288 extern void set_last_source_file (const char *name);
 289
 290 /* Fetch the name of the last source file.  */
 291
 292 extern const char *get_last_source_file (void);
 293
 294 /* Return the compunit symtab object.
 295    It is only valid to call this between calls to start_symtab and the
 296    end_symtab* functions.  */
 297
 298 extern struct compunit_symtab *buildsym_compunit_symtab (void);
 299
 300 /* Return the macro table.
 301    Initialize it if this is the first use.
 302    It is only valid to call this between calls to start_symtab and the
 303    end_symtab* functions.  */
 304
 305 extern struct macro_table *get_macro_table (void);
 306
 307 /* Set the last source start address.  Can only be used between
 308    start_symtab and end_symtab* calls.  */
 309
 310 extern void set_last_source_start_addr (CORE_ADDR addr);
 311
 312 /* Get the last source start address.  Can only be used between
 313    start_symtab and end_symtab* calls.  */
 314
 315 extern CORE_ADDR get_last_source_start_addr ();
 316
 317 #undef EXTERN
 318
 319 #endif /* defined (BUILDSYM_H) */