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 /* The list of sub-source-files within the current individual
  50    compilation.  Each file gets its own symtab with its own linetable
  51    and associated info, but they all share one blockvector.  */
  52
  53 struct subfile
  54 {
  55   struct subfile *next;
  56   /* Space for this is malloc'd.  */
  57   char *name;
  58   /* Space for this is malloc'd.  */
  59   struct linetable *line_vector;
  60   int line_vector_length;
  61   /* The "containing" compunit.  */
  62   struct buildsym_compunit *buildsym_compunit;
  63   enum language language;
  64   struct symtab *symtab;
  65 };
  66
  67 /* Record the symbols defined for each context in a list.  We don't
  68    create a struct block for the context until we know how long to
  69    make it.  */
  70
  71 #define PENDINGSIZE 100
  72
  73 struct pending
  74   {
  75     struct pending *next;
  76     int nsyms;
  77     struct symbol *symbol[PENDINGSIZE];
  78   };
  79
  80 /* Here are the three lists that symbols are put on.  */
  81
  82 /* static at top level, and types */
  83
  84 EXTERN struct pending *file_symbols;
  85
  86 /* global functions and variables */
  87
  88 EXTERN struct pending *global_symbols;
  89
  90 /* everything local to lexical context */
  91
  92 EXTERN struct pending *local_symbols;
  93
  94 /* Stack representing unclosed lexical contexts (that will become
  95    blocks, eventually).  */
  96
  97 struct context_stack
  98   {
  99     /* Outer locals at the time we entered */
 100
 101     struct pending *locals;
 102
 103     /* Pending using directives at the time we entered.  */
 104
 105     struct using_direct *local_using_directives;
 106
 107     /* Pointer into blocklist as of entry */
 108
 109     struct pending_block *old_blocks;
 110
 111     /* Name of function, if any, defining context */
 112
 113     struct symbol *name;
 114
 115     /* Expression that computes the frame base of the lexically enclosing
 116        function, if any.  NULL otherwise.  */
 117
 118     struct dynamic_prop *static_link;
 119
 120     /* PC where this context starts */
 121
 122     CORE_ADDR start_addr;
 123
 124     /* Temp slot for exception handling.  */
 125
 126     CORE_ADDR end_addr;
 127
 128     /* For error-checking matching push/pop */
 129
 130     int depth;
 131
 132   };
 133
 134 /* The type of the record_line function.  */
 135 typedef void (record_line_ftype) (struct subfile *subfile, int line,
 136                                   CORE_ADDR pc);
 137
 138 \f
 139
 140 extern void add_symbol_to_list (struct symbol *symbol,
 141                                 struct pending **listhead);
 142
 143 extern struct symbol *find_symbol_in_list (struct pending *list,
 144                                            char *name, int length);
 145
 146 extern struct block *finish_block (struct symbol *symbol,
 147                                    struct pending_block *old_blocks,
 148                                    const struct dynamic_prop *static_link,
 149                                    CORE_ADDR start,
 150                                    CORE_ADDR end);
 151
 152 extern void record_block_range (struct block *,
 153                                 CORE_ADDR start, CORE_ADDR end_inclusive);
 154
 155 class scoped_free_pendings
 156 {
 157 public:
 158
 159   scoped_free_pendings () = default;
 160   ~scoped_free_pendings ();
 161
 162   DISABLE_COPY_AND_ASSIGN (scoped_free_pendings);
 163 };
 164
 165 extern void start_subfile (const char *name);
 166
 167 extern void patch_subfile_names (struct subfile *subfile, const char *name);
 168
 169 extern void push_subfile ();
 170
 171 extern const char *pop_subfile ();
 172
 173 extern struct block *end_symtab_get_static_block (CORE_ADDR end_addr,
 174                                                   int expandable,
 175                                                   int required);
 176
 177 extern struct compunit_symtab *
 178   end_symtab_from_static_block (struct block *static_block,
 179                                 int section, int expandable);
 180
 181 extern struct compunit_symtab *end_symtab (CORE_ADDR end_addr, int section);
 182
 183 extern struct compunit_symtab *end_expandable_symtab (CORE_ADDR end_addr,
 184                                                       int section);
 185
 186 extern void augment_type_symtab (void);
 187
 188 extern void buildsym_init ();
 189
 190 extern struct context_stack *push_context (int desc, CORE_ADDR valu);
 191
 192 extern struct context_stack pop_context ();
 193
 194 extern record_line_ftype record_line;
 195
 196 extern struct compunit_symtab *start_symtab (struct objfile *objfile,
 197                                              const char *name,
 198                                              const char *comp_dir,
 199                                              CORE_ADDR start_addr,
 200                                              enum language language);
 201
 202 extern void restart_symtab (struct compunit_symtab *cust,
 203                             const char *name, CORE_ADDR start_addr);
 204
 205 /* Record the name of the debug format in the current pending symbol
 206    table.  FORMAT must be a string with a lifetime at least as long as
 207    the symtab's objfile.  */
 208
 209 extern void record_debugformat (const char *format);
 210
 211 /* Record the name of the debuginfo producer (usually the compiler) in
 212    the current pending symbol table.  PRODUCER must be a string with a
 213    lifetime at least as long as the symtab's objfile.  */
 214
 215 extern void record_producer (const char *producer);
 216
 217 /* Set the name of the last source file.  NAME is copied by this
 218    function.  */
 219
 220 extern void set_last_source_file (const char *name);
 221
 222 /* Fetch the name of the last source file.  */
 223
 224 extern const char *get_last_source_file (void);
 225
 226 /* Return the compunit symtab object.
 227    It is only valid to call this between calls to start_symtab and the
 228    end_symtab* functions.  */
 229
 230 extern struct compunit_symtab *buildsym_compunit_symtab (void);
 231
 232 /* Return the macro table.
 233    Initialize it if this is the first use.
 234    It is only valid to call this between calls to start_symtab and the
 235    end_symtab* functions.  */
 236
 237 extern struct macro_table *get_macro_table (void);
 238
 239 /* Set the last source start address.  Can only be used between
 240    start_symtab and end_symtab* calls.  */
 241
 242 extern void set_last_source_start_addr (CORE_ADDR addr);
 243
 244 /* Get the last source start address.  Can only be used between
 245    start_symtab and end_symtab* calls.  */
 246
 247 extern CORE_ADDR get_last_source_start_addr ();
 248
 249 /* Return the local using directives.  */
 250
 251 extern struct using_direct **get_local_using_directives ();
 252
 253 /* Set the list of local using directives.  */
 254
 255 extern void set_local_using_directives (struct using_direct *new_local);
 256
 257 /* Return the global using directives.  */
 258
 259 extern struct using_direct **get_global_using_directives ();
 260
 261 /* True if the context stack is empty.  */
 262
 263 extern bool outermost_context_p ();
 264
 265 /* Return the top of the context stack, or nullptr if there is an
 266    entry.  */
 267
 268 extern struct context_stack *get_current_context_stack ();
 269
 270 /* Return the context stack depth.  */
 271
 272 extern int get_context_stack_depth ();
 273
 274 /* Return the current subfile.  */
 275
 276 extern struct subfile *get_current_subfile ();
 277
 278 #undef EXTERN
 279
 280 #endif /* defined (BUILDSYM_H) */