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); 190 191 192 193 #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) */ 306