1 /* Build symbol tables in GDB's internal format. 2 Copyright (C) 1986-2015 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 #ifndef EXTERN 43 #define EXTERN extern 44 #endif 45 46 #define HASHSIZE 127 /* Size of things hashed via 47 hashname(). */ 48 49 /* Core address of start of text of current source file. This too 50 comes from the N_SO symbol. For Dwarf it typically comes from the 51 DW_AT_low_pc attribute of a DW_TAG_compile_unit DIE. */ 52 53 EXTERN CORE_ADDR last_source_start_addr; 54 55 /* The list of sub-source-files within the current individual 56 compilation. Each file gets its own symtab with its own linetable 57 and associated info, but they all share one blockvector. */ 58 59 struct subfile 60 { 61 struct subfile *next; 62 /* Space for this is malloc'd. */ 63 char *name; 64 /* Space for this is malloc'd. */ 65 struct linetable *line_vector; 66 int line_vector_length; 67 /* The "containing" compunit. */ 68 struct buildsym_compunit *buildsym_compunit; 69 enum language language; 70 struct symtab *symtab; 71 }; 72 73 EXTERN struct subfile *current_subfile; 74 75 /* Global variable which, when set, indicates that we are processing a 76 .o file compiled with gcc */ 77 78 EXTERN unsigned char processing_gcc_compilation; 79 80 /* When set, we are processing a .o file compiled by sun acc. This is 81 misnamed; it refers to all stabs-in-elf implementations which use 82 N_UNDF the way Sun does, including Solaris gcc. Hopefully all 83 stabs-in-elf implementations ever invented will choose to be 84 compatible. */ 85 86 EXTERN unsigned char processing_acc_compilation; 87 88 /* Count symbols as they are processed, for error messages. */ 89 90 EXTERN unsigned int symnum; 91 92 /* Record the symbols defined for each context in a list. We don't 93 create a struct block for the context until we know how long to 94 make it. */ 95 96 #define PENDINGSIZE 100 97 98 struct pending 99 { 100 struct pending *next; 101 int nsyms; 102 struct symbol *symbol[PENDINGSIZE]; 103 }; 104 105 /* Here are the three lists that symbols are put on. */ 106 107 /* static at top level, and types */ 108 109 EXTERN struct pending *file_symbols; 110 111 /* global functions and variables */ 112 113 EXTERN struct pending *global_symbols; 114 115 /* everything local to lexical context */ 116 117 EXTERN struct pending *local_symbols; 118 119 /* "using" directives local to lexical context. */ 120 121 EXTERN struct using_direct *using_directives; 122 123 /* Stack representing unclosed lexical contexts (that will become 124 blocks, eventually). */ 125 126 struct context_stack 127 { 128 /* Outer locals at the time we entered */ 129 130 struct pending *locals; 131 132 /* Pending using directives at the time we entered. */ 133 134 struct using_direct *using_directives; 135 136 /* Pointer into blocklist as of entry */ 137 138 struct pending_block *old_blocks; 139 140 /* Name of function, if any, defining context */ 141 142 struct symbol *name; 143 144 /* PC where this context starts */ 145 146 CORE_ADDR start_addr; 147 148 /* Temp slot for exception handling. */ 149 150 CORE_ADDR end_addr; 151 152 /* For error-checking matching push/pop */ 153 154 int depth; 155 156 }; 157 158 EXTERN struct context_stack *context_stack; 159 160 /* Index of first unused entry in context stack. */ 161 162 EXTERN int context_stack_depth; 163 164 /* Currently allocated size of context stack. */ 165 166 EXTERN int context_stack_size; 167 168 /* Non-zero if the context stack is empty. */ 169 #define outermost_context_p() (context_stack_depth == 0) 170 171 /* Nonzero if within a function (so symbols should be local, if 172 nothing says specifically). */ 173 174 EXTERN int within_function; 175 176 /* The type of the record_line function. */ 177 typedef void (record_line_ftype) (struct subfile *subfile, int line, 178 CORE_ADDR pc); 179 180 181 182 #define next_symbol_text(objfile) (*next_symbol_text_func)(objfile) 183 184 /* Function to invoke get the next symbol. Return the symbol name. */ 185 186 EXTERN char *(*next_symbol_text_func) (struct objfile *); 187 188 extern void add_symbol_to_list (struct symbol *symbol, 189 struct pending **listhead); 190 191 extern struct symbol *find_symbol_in_list (struct pending *list, 192 char *name, int length); 193 194 extern struct block *finish_block (struct symbol *symbol, 195 struct pending **listhead, 196 struct pending_block *old_blocks, 197 CORE_ADDR start, CORE_ADDR end); 198 199 extern void record_block_range (struct block *, 200 CORE_ADDR start, CORE_ADDR end_inclusive); 201 202 extern void really_free_pendings (void *dummy); 203 204 extern void start_subfile (const char *name); 205 206 extern void patch_subfile_names (struct subfile *subfile, char *name); 207 208 extern void push_subfile (void); 209 210 extern char *pop_subfile (void); 211 212 extern struct block *end_symtab_get_static_block (CORE_ADDR end_addr, 213 int expandable, 214 int required); 215 216 extern struct compunit_symtab * 217 end_symtab_from_static_block (struct block *static_block, 218 int section, int expandable); 219 220 extern struct compunit_symtab *end_symtab (CORE_ADDR end_addr, int section); 221 222 extern struct compunit_symtab *end_expandable_symtab (CORE_ADDR end_addr, 223 int section); 224 225 extern void augment_type_symtab (void); 226 227 /* Defined in stabsread.c. */ 228 229 extern void scan_file_globals (struct objfile *objfile); 230 231 extern void buildsym_new_init (void); 232 233 extern void buildsym_init (void); 234 235 extern struct context_stack *push_context (int desc, CORE_ADDR valu); 236 237 extern struct context_stack *pop_context (void); 238 239 extern record_line_ftype record_line; 240 241 extern struct compunit_symtab *start_symtab (struct objfile *objfile, 242 const char *name, 243 const char *comp_dir, 244 CORE_ADDR start_addr); 245 246 extern void restart_symtab (struct compunit_symtab *cust, 247 const char *name, CORE_ADDR start_addr); 248 249 extern int hashname (const char *name); 250 251 extern void free_pending_blocks (void); 252 253 /* Record the name of the debug format in the current pending symbol 254 table. FORMAT must be a string with a lifetime at least as long as 255 the symtab's objfile. */ 256 257 extern void record_debugformat (const char *format); 258 259 /* Record the name of the debuginfo producer (usually the compiler) in 260 the current pending symbol table. PRODUCER must be a string with a 261 lifetime at least as long as the symtab's objfile. */ 262 263 extern void record_producer (const char *producer); 264 265 extern void merge_symbol_lists (struct pending **srclist, 266 struct pending **targetlist); 267 268 /* Set the name of the last source file. NAME is copied by this 269 function. */ 270 271 extern void set_last_source_file (const char *name); 272 273 /* Fetch the name of the last source file. */ 274 275 extern const char *get_last_source_file (void); 276 277 /* Return the compunit symtab object. 278 It is only valid to call this between calls to start_symtab and the 279 end_symtab* functions. */ 280 281 extern struct compunit_symtab *buildsym_compunit_symtab (void); 282 283 /* Return the macro table. 284 Initialize it if this is the first use. 285 It is only valid to call this between calls to start_symtab and the 286 end_symtab* functions. */ 287 288 extern struct macro_table *get_macro_table (void); 289 290 #undef EXTERN 291 292 #endif /* defined (BUILDSYM_H) */ 293