1 /* Build symbol tables in GDB's internal format. 2 Copyright (C) 1986-2013 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 26 /* This module provides definitions used for creating and adding to 27 the symbol table. These routines are called from various symbol- 28 file-reading routines. 29 30 They originated in dbxread.c of gdb-4.2, and were split out to 31 make xcoffread.c more maintainable by sharing code. 32 33 Variables declared in this file can be defined by #define-ing the 34 name EXTERN to null. It is used to declare variables that are 35 normally extern, but which get defined in a single module using 36 this technique. */ 37 38 struct block; 39 struct pending_block; 40 41 #ifndef EXTERN 42 #define EXTERN extern 43 #endif 44 45 #define HASHSIZE 127 /* Size of things hashed via 46 hashname(). */ 47 48 /* Core address of start of text of current source file. This too 49 comes from the N_SO symbol. For Dwarf it typically comes from the 50 DW_AT_low_pc attribute of a DW_TAG_compile_unit DIE. */ 51 52 EXTERN CORE_ADDR last_source_start_addr; 53 54 /* The list of sub-source-files within the current individual 55 compilation. Each file gets its own symtab with its own linetable 56 and associated info, but they all share one blockvector. */ 57 58 struct subfile 59 { 60 struct subfile *next; 61 char *name; 62 char *dirname; 63 struct linetable *line_vector; 64 int line_vector_length; 65 enum language language; 66 const char *producer; 67 const char *debugformat; 68 struct symtab *symtab; 69 }; 70 71 EXTERN struct subfile *current_subfile; 72 73 /* Global variable which, when set, indicates that we are processing a 74 .o file compiled with gcc */ 75 76 EXTERN unsigned char processing_gcc_compilation; 77 78 /* When set, we are processing a .o file compiled by sun acc. This is 79 misnamed; it refers to all stabs-in-elf implementations which use 80 N_UNDF the way Sun does, including Solaris gcc. Hopefully all 81 stabs-in-elf implementations ever invented will choose to be 82 compatible. */ 83 84 EXTERN unsigned char processing_acc_compilation; 85 86 /* Count symbols as they are processed, for error messages. */ 87 88 EXTERN unsigned int symnum; 89 90 /* Record the symbols defined for each context in a list. We don't 91 create a struct block for the context until we know how long to 92 make it. */ 93 94 #define PENDINGSIZE 100 95 96 struct pending 97 { 98 struct pending *next; 99 int nsyms; 100 struct symbol *symbol[PENDINGSIZE]; 101 }; 102 103 /* Here are the three lists that symbols are put on. */ 104 105 /* static at top level, and types */ 106 107 EXTERN struct pending *file_symbols; 108 109 /* global functions and variables */ 110 111 EXTERN struct pending *global_symbols; 112 113 /* everything local to lexical context */ 114 115 EXTERN struct pending *local_symbols; 116 117 /* "using" directives local to lexical context. */ 118 119 EXTERN struct using_direct *using_directives; 120 121 /* Stack representing unclosed lexical contexts (that will become 122 blocks, eventually). */ 123 124 struct context_stack 125 { 126 /* Outer locals at the time we entered */ 127 128 struct pending *locals; 129 130 /* Pending using directives at the time we entered. */ 131 132 struct using_direct *using_directives; 133 134 /* Pointer into blocklist as of entry */ 135 136 struct pending_block *old_blocks; 137 138 /* Name of function, if any, defining context */ 139 140 struct symbol *name; 141 142 /* PC where this context starts */ 143 144 CORE_ADDR start_addr; 145 146 /* Temp slot for exception handling. */ 147 148 CORE_ADDR end_addr; 149 150 /* For error-checking matching push/pop */ 151 152 int depth; 153 154 }; 155 156 EXTERN struct context_stack *context_stack; 157 158 /* Index of first unused entry in context stack. */ 159 160 EXTERN int context_stack_depth; 161 162 /* Currently allocated size of context stack. */ 163 164 EXTERN int context_stack_size; 165 166 /* Non-zero if the context stack is empty. */ 167 #define outermost_context_p() (context_stack_depth == 0) 168 169 /* Nonzero if within a function (so symbols should be local, if 170 nothing says specifically). */ 171 172 EXTERN int within_function; 173 174 175 176 struct subfile_stack 177 { 178 struct subfile_stack *next; 179 char *name; 180 }; 181 182 EXTERN struct subfile_stack *subfile_stack; 183 184 #define next_symbol_text(objfile) (*next_symbol_text_func)(objfile) 185 186 /* Function to invoke get the next symbol. Return the symbol name. */ 187 188 EXTERN char *(*next_symbol_text_func) (struct objfile *); 189 190 /* Vector of types defined so far, indexed by their type numbers. 191 Used for both stabs and coff. (In newer sun systems, dbx uses a 192 pair of numbers in parens, as in "(SUBFILENUM,NUMWITHINSUBFILE)". 193 Then these numbers must be translated through the type_translations 194 hash table to get the index into the type vector.) */ 195 196 EXTERN struct type **type_vector; 197 198 /* Number of elements allocated for type_vector currently. */ 199 200 EXTERN int type_vector_length; 201 202 /* Initial size of type vector. Is realloc'd larger if needed, and 203 realloc'd down to the size actually used, when completed. */ 204 205 #define INITIAL_TYPE_VECTOR_LENGTH 160 206 207 extern void add_symbol_to_list (struct symbol *symbol, 208 struct pending **listhead); 209 210 extern struct symbol *find_symbol_in_list (struct pending *list, 211 char *name, int length); 212 213 extern struct block *finish_block (struct symbol *symbol, 214 struct pending **listhead, 215 struct pending_block *old_blocks, 216 CORE_ADDR start, CORE_ADDR end, 217 struct objfile *objfile); 218 219 extern void record_block_range (struct block *, 220 CORE_ADDR start, CORE_ADDR end_inclusive); 221 222 extern void really_free_pendings (void *dummy); 223 224 extern void start_subfile (const char *name, const char *dirname); 225 226 extern void patch_subfile_names (struct subfile *subfile, char *name); 227 228 extern void push_subfile (void); 229 230 extern char *pop_subfile (void); 231 232 extern struct block *end_symtab_get_static_block (CORE_ADDR end_addr, 233 struct objfile *objfile, 234 int expandable, 235 int required); 236 237 extern struct symtab *end_symtab_from_static_block (struct block *static_block, 238 struct objfile *objfile, 239 int section, 240 int expandable); 241 242 extern struct symtab *end_symtab (CORE_ADDR end_addr, 243 struct objfile *objfile, int section); 244 245 extern struct symtab *end_expandable_symtab (CORE_ADDR end_addr, 246 struct objfile *objfile, 247 int section); 248 249 extern void augment_type_symtab (struct objfile *objfile, 250 struct symtab *primary_symtab); 251 252 /* Defined in stabsread.c. */ 253 254 extern void scan_file_globals (struct objfile *objfile); 255 256 extern void buildsym_new_init (void); 257 258 extern void buildsym_init (void); 259 260 extern struct context_stack *push_context (int desc, CORE_ADDR valu); 261 262 extern struct context_stack *pop_context (void); 263 264 extern void record_line (struct subfile *subfile, int line, CORE_ADDR pc); 265 266 extern void start_symtab (const char *name, const char *dirname, 267 CORE_ADDR start_addr); 268 269 extern void restart_symtab (CORE_ADDR start_addr); 270 271 extern int hashname (const char *name); 272 273 extern void free_pending_blocks (void); 274 275 /* Record the name of the debug format in the current pending symbol 276 table. FORMAT must be a string with a lifetime at least as long as 277 the symtab's objfile. */ 278 279 extern void record_debugformat (const char *format); 280 281 /* Record the name of the debuginfo producer (usually the compiler) in 282 the current pending symbol table. PRODUCER must be a string with a 283 lifetime at least as long as the symtab's objfile. */ 284 285 extern void record_producer (const char *producer); 286 287 extern void merge_symbol_lists (struct pending **srclist, 288 struct pending **targetlist); 289 290 /* Set the name of the last source file. NAME is copied by this 291 function. */ 292 293 extern void set_last_source_file (const char *name); 294 295 /* Fetch the name of the last source file. */ 296 297 extern const char *get_last_source_file (void); 298 299 /* The macro table for the compilation unit whose symbols we're 300 currently reading. All the symtabs for this CU will point to 301 this. */ 302 EXTERN struct macro_table *pending_macros; 303 304 #undef EXTERN 305 306 #endif /* defined (BUILDSYM_H) */ 307