| 1 | /* Symbol table definitions for GDB. |
| 2 | |
| 3 | Copyright (C) 1986, 1988-2004, 2007-2012 Free Software Foundation, |
| 4 | Inc. |
| 5 | |
| 6 | This file is part of GDB. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | #if !defined (SYMTAB_H) |
| 22 | #define SYMTAB_H 1 |
| 23 | |
| 24 | #include "vec.h" |
| 25 | #include "gdb_vecs.h" |
| 26 | #include "gdbtypes.h" |
| 27 | |
| 28 | /* Opaque declarations. */ |
| 29 | struct ui_file; |
| 30 | struct frame_info; |
| 31 | struct symbol; |
| 32 | struct obstack; |
| 33 | struct objfile; |
| 34 | struct block; |
| 35 | struct blockvector; |
| 36 | struct axs_value; |
| 37 | struct agent_expr; |
| 38 | struct program_space; |
| 39 | struct language_defn; |
| 40 | struct probe; |
| 41 | struct common_block; |
| 42 | |
| 43 | /* Some of the structures in this file are space critical. |
| 44 | The space-critical structures are: |
| 45 | |
| 46 | struct general_symbol_info |
| 47 | struct symbol |
| 48 | struct partial_symbol |
| 49 | |
| 50 | These structures are laid out to encourage good packing. |
| 51 | They use ENUM_BITFIELD and short int fields, and they order the |
| 52 | structure members so that fields less than a word are next |
| 53 | to each other so they can be packed together. */ |
| 54 | |
| 55 | /* Rearranged: used ENUM_BITFIELD and rearranged field order in |
| 56 | all the space critical structures (plus struct minimal_symbol). |
| 57 | Memory usage dropped from 99360768 bytes to 90001408 bytes. |
| 58 | I measured this with before-and-after tests of |
| 59 | "HEAD-old-gdb -readnow HEAD-old-gdb" and |
| 60 | "HEAD-new-gdb -readnow HEAD-old-gdb" on native i686-pc-linux-gnu, |
| 61 | red hat linux 8, with LD_LIBRARY_PATH=/usr/lib/debug, |
| 62 | typing "maint space 1" at the first command prompt. |
| 63 | |
| 64 | Here is another measurement (from andrew c): |
| 65 | # no /usr/lib/debug, just plain glibc, like a normal user |
| 66 | gdb HEAD-old-gdb |
| 67 | (gdb) break internal_error |
| 68 | (gdb) run |
| 69 | (gdb) maint internal-error |
| 70 | (gdb) backtrace |
| 71 | (gdb) maint space 1 |
| 72 | |
| 73 | gdb gdb_6_0_branch 2003-08-19 space used: 8896512 |
| 74 | gdb HEAD 2003-08-19 space used: 8904704 |
| 75 | gdb HEAD 2003-08-21 space used: 8396800 (+symtab.h) |
| 76 | gdb HEAD 2003-08-21 space used: 8265728 (+gdbtypes.h) |
| 77 | |
| 78 | The third line shows the savings from the optimizations in symtab.h. |
| 79 | The fourth line shows the savings from the optimizations in |
| 80 | gdbtypes.h. Both optimizations are in gdb HEAD now. |
| 81 | |
| 82 | --chastain 2003-08-21 */ |
| 83 | |
| 84 | /* Struct for storing C++ specific information. Allocated when needed. */ |
| 85 | |
| 86 | struct cplus_specific |
| 87 | { |
| 88 | const char *demangled_name; |
| 89 | }; |
| 90 | |
| 91 | /* Define a structure for the information that is common to all symbol types, |
| 92 | including minimal symbols, partial symbols, and full symbols. In a |
| 93 | multilanguage environment, some language specific information may need to |
| 94 | be recorded along with each symbol. */ |
| 95 | |
| 96 | /* This structure is space critical. See space comments at the top. */ |
| 97 | |
| 98 | struct general_symbol_info |
| 99 | { |
| 100 | /* Name of the symbol. This is a required field. Storage for the |
| 101 | name is allocated on the objfile_obstack for the associated |
| 102 | objfile. For languages like C++ that make a distinction between |
| 103 | the mangled name and demangled name, this is the mangled |
| 104 | name. */ |
| 105 | |
| 106 | const char *name; |
| 107 | |
| 108 | /* Value of the symbol. Which member of this union to use, and what |
| 109 | it means, depends on what kind of symbol this is and its |
| 110 | SYMBOL_CLASS. See comments there for more details. All of these |
| 111 | are in host byte order (though what they point to might be in |
| 112 | target byte order, e.g. LOC_CONST_BYTES). */ |
| 113 | |
| 114 | union |
| 115 | { |
| 116 | LONGEST ivalue; |
| 117 | |
| 118 | struct block *block; |
| 119 | |
| 120 | gdb_byte *bytes; |
| 121 | |
| 122 | CORE_ADDR address; |
| 123 | |
| 124 | /* A common block. Used with COMMON_BLOCK_DOMAIN. */ |
| 125 | |
| 126 | struct common_block *common_block; |
| 127 | |
| 128 | /* For opaque typedef struct chain. */ |
| 129 | |
| 130 | struct symbol *chain; |
| 131 | } |
| 132 | value; |
| 133 | |
| 134 | /* Since one and only one language can apply, wrap the language specific |
| 135 | information inside a union. */ |
| 136 | |
| 137 | union |
| 138 | { |
| 139 | /* This is used by languages which wish to store a demangled name. |
| 140 | currently used by Ada, Java, and Objective C. */ |
| 141 | struct mangled_lang |
| 142 | { |
| 143 | const char *demangled_name; |
| 144 | } |
| 145 | mangled_lang; |
| 146 | |
| 147 | struct cplus_specific *cplus_specific; |
| 148 | } |
| 149 | language_specific; |
| 150 | |
| 151 | /* Record the source code language that applies to this symbol. |
| 152 | This is used to select one of the fields from the language specific |
| 153 | union above. */ |
| 154 | |
| 155 | ENUM_BITFIELD(language) language : 8; |
| 156 | |
| 157 | /* Which section is this symbol in? This is an index into |
| 158 | section_offsets for this objfile. Negative means that the symbol |
| 159 | does not get relocated relative to a section. |
| 160 | Disclaimer: currently this is just used for xcoff, so don't |
| 161 | expect all symbol-reading code to set it correctly (the ELF code |
| 162 | also tries to set it correctly). */ |
| 163 | |
| 164 | short section; |
| 165 | |
| 166 | /* The section associated with this symbol. It can be NULL. */ |
| 167 | |
| 168 | struct obj_section *obj_section; |
| 169 | }; |
| 170 | |
| 171 | extern void symbol_set_demangled_name (struct general_symbol_info *, char *, |
| 172 | struct objfile *); |
| 173 | |
| 174 | extern const char *symbol_get_demangled_name |
| 175 | (const struct general_symbol_info *); |
| 176 | |
| 177 | extern CORE_ADDR symbol_overlayed_address (CORE_ADDR, struct obj_section *); |
| 178 | |
| 179 | /* Note that all the following SYMBOL_* macros are used with the |
| 180 | SYMBOL argument being either a partial symbol, a minimal symbol or |
| 181 | a full symbol. All three types have a ginfo field. In particular |
| 182 | the SYMBOL_SET_LANGUAGE, SYMBOL_DEMANGLED_NAME, etc. |
| 183 | macros cannot be entirely substituted by |
| 184 | functions, unless the callers are changed to pass in the ginfo |
| 185 | field only, instead of the SYMBOL parameter. */ |
| 186 | |
| 187 | #define SYMBOL_VALUE(symbol) (symbol)->ginfo.value.ivalue |
| 188 | #define SYMBOL_VALUE_ADDRESS(symbol) (symbol)->ginfo.value.address |
| 189 | #define SYMBOL_VALUE_BYTES(symbol) (symbol)->ginfo.value.bytes |
| 190 | #define SYMBOL_VALUE_COMMON_BLOCK(symbol) (symbol)->ginfo.value.common_block |
| 191 | #define SYMBOL_BLOCK_VALUE(symbol) (symbol)->ginfo.value.block |
| 192 | #define SYMBOL_VALUE_CHAIN(symbol) (symbol)->ginfo.value.chain |
| 193 | #define SYMBOL_LANGUAGE(symbol) (symbol)->ginfo.language |
| 194 | #define SYMBOL_SECTION(symbol) (symbol)->ginfo.section |
| 195 | #define SYMBOL_OBJ_SECTION(symbol) (symbol)->ginfo.obj_section |
| 196 | |
| 197 | /* Initializes the language dependent portion of a symbol |
| 198 | depending upon the language for the symbol. */ |
| 199 | #define SYMBOL_SET_LANGUAGE(symbol,language) \ |
| 200 | (symbol_set_language (&(symbol)->ginfo, (language))) |
| 201 | extern void symbol_set_language (struct general_symbol_info *symbol, |
| 202 | enum language language); |
| 203 | |
| 204 | /* Set just the linkage name of a symbol; do not try to demangle |
| 205 | it. Used for constructs which do not have a mangled name, |
| 206 | e.g. struct tags. Unlike SYMBOL_SET_NAMES, linkage_name must |
| 207 | be terminated and either already on the objfile's obstack or |
| 208 | permanently allocated. */ |
| 209 | #define SYMBOL_SET_LINKAGE_NAME(symbol,linkage_name) \ |
| 210 | (symbol)->ginfo.name = (linkage_name) |
| 211 | |
| 212 | /* Set the linkage and natural names of a symbol, by demangling |
| 213 | the linkage name. */ |
| 214 | #define SYMBOL_SET_NAMES(symbol,linkage_name,len,copy_name,objfile) \ |
| 215 | symbol_set_names (&(symbol)->ginfo, linkage_name, len, copy_name, objfile) |
| 216 | extern void symbol_set_names (struct general_symbol_info *symbol, |
| 217 | const char *linkage_name, int len, int copy_name, |
| 218 | struct objfile *objfile); |
| 219 | |
| 220 | /* Now come lots of name accessor macros. Short version as to when to |
| 221 | use which: Use SYMBOL_NATURAL_NAME to refer to the name of the |
| 222 | symbol in the original source code. Use SYMBOL_LINKAGE_NAME if you |
| 223 | want to know what the linker thinks the symbol's name is. Use |
| 224 | SYMBOL_PRINT_NAME for output. Use SYMBOL_DEMANGLED_NAME if you |
| 225 | specifically need to know whether SYMBOL_NATURAL_NAME and |
| 226 | SYMBOL_LINKAGE_NAME are different. */ |
| 227 | |
| 228 | /* Return SYMBOL's "natural" name, i.e. the name that it was called in |
| 229 | the original source code. In languages like C++ where symbols may |
| 230 | be mangled for ease of manipulation by the linker, this is the |
| 231 | demangled name. */ |
| 232 | |
| 233 | #define SYMBOL_NATURAL_NAME(symbol) \ |
| 234 | (symbol_natural_name (&(symbol)->ginfo)) |
| 235 | extern const char *symbol_natural_name |
| 236 | (const struct general_symbol_info *symbol); |
| 237 | |
| 238 | /* Return SYMBOL's name from the point of view of the linker. In |
| 239 | languages like C++ where symbols may be mangled for ease of |
| 240 | manipulation by the linker, this is the mangled name; otherwise, |
| 241 | it's the same as SYMBOL_NATURAL_NAME. */ |
| 242 | |
| 243 | #define SYMBOL_LINKAGE_NAME(symbol) (symbol)->ginfo.name |
| 244 | |
| 245 | /* Return the demangled name for a symbol based on the language for |
| 246 | that symbol. If no demangled name exists, return NULL. */ |
| 247 | #define SYMBOL_DEMANGLED_NAME(symbol) \ |
| 248 | (symbol_demangled_name (&(symbol)->ginfo)) |
| 249 | extern const char *symbol_demangled_name |
| 250 | (const struct general_symbol_info *symbol); |
| 251 | |
| 252 | /* Macro that returns a version of the name of a symbol that is |
| 253 | suitable for output. In C++ this is the "demangled" form of the |
| 254 | name if demangle is on and the "mangled" form of the name if |
| 255 | demangle is off. In other languages this is just the symbol name. |
| 256 | The result should never be NULL. Don't use this for internal |
| 257 | purposes (e.g. storing in a hashtable): it's only suitable for output. |
| 258 | |
| 259 | N.B. symbol may be anything with a ginfo member, |
| 260 | e.g., struct symbol or struct minimal_symbol. */ |
| 261 | |
| 262 | #define SYMBOL_PRINT_NAME(symbol) \ |
| 263 | (demangle ? SYMBOL_NATURAL_NAME (symbol) : SYMBOL_LINKAGE_NAME (symbol)) |
| 264 | extern int demangle; |
| 265 | |
| 266 | /* Macro that returns the name to be used when sorting and searching symbols. |
| 267 | In C++, Chill, and Java, we search for the demangled form of a name, |
| 268 | and so sort symbols accordingly. In Ada, however, we search by mangled |
| 269 | name. If there is no distinct demangled name, then SYMBOL_SEARCH_NAME |
| 270 | returns the same value (same pointer) as SYMBOL_LINKAGE_NAME. */ |
| 271 | #define SYMBOL_SEARCH_NAME(symbol) \ |
| 272 | (symbol_search_name (&(symbol)->ginfo)) |
| 273 | extern const char *symbol_search_name (const struct general_symbol_info *); |
| 274 | |
| 275 | /* Return non-zero if NAME matches the "search" name of SYMBOL. |
| 276 | Whitespace and trailing parentheses are ignored. |
| 277 | See strcmp_iw for details about its behavior. */ |
| 278 | #define SYMBOL_MATCHES_SEARCH_NAME(symbol, name) \ |
| 279 | (strcmp_iw (SYMBOL_SEARCH_NAME (symbol), (name)) == 0) |
| 280 | |
| 281 | /* Classification types for a minimal symbol. These should be taken as |
| 282 | "advisory only", since if gdb can't easily figure out a |
| 283 | classification it simply selects mst_unknown. It may also have to |
| 284 | guess when it can't figure out which is a better match between two |
| 285 | types (mst_data versus mst_bss) for example. Since the minimal |
| 286 | symbol info is sometimes derived from the BFD library's view of a |
| 287 | file, we need to live with what information bfd supplies. */ |
| 288 | |
| 289 | enum minimal_symbol_type |
| 290 | { |
| 291 | mst_unknown = 0, /* Unknown type, the default */ |
| 292 | mst_text, /* Generally executable instructions */ |
| 293 | mst_text_gnu_ifunc, /* Executable code returning address |
| 294 | of executable code */ |
| 295 | mst_slot_got_plt, /* GOT entries for .plt sections */ |
| 296 | mst_data, /* Generally initialized data */ |
| 297 | mst_bss, /* Generally uninitialized data */ |
| 298 | mst_abs, /* Generally absolute (nonrelocatable) */ |
| 299 | /* GDB uses mst_solib_trampoline for the start address of a shared |
| 300 | library trampoline entry. Breakpoints for shared library functions |
| 301 | are put there if the shared library is not yet loaded. |
| 302 | After the shared library is loaded, lookup_minimal_symbol will |
| 303 | prefer the minimal symbol from the shared library (usually |
| 304 | a mst_text symbol) over the mst_solib_trampoline symbol, and the |
| 305 | breakpoints will be moved to their true address in the shared |
| 306 | library via breakpoint_re_set. */ |
| 307 | mst_solib_trampoline, /* Shared library trampoline code */ |
| 308 | /* For the mst_file* types, the names are only guaranteed to be unique |
| 309 | within a given .o file. */ |
| 310 | mst_file_text, /* Static version of mst_text */ |
| 311 | mst_file_data, /* Static version of mst_data */ |
| 312 | mst_file_bss /* Static version of mst_bss */ |
| 313 | }; |
| 314 | |
| 315 | /* Define a simple structure used to hold some very basic information about |
| 316 | all defined global symbols (text, data, bss, abs, etc). The only required |
| 317 | information is the general_symbol_info. |
| 318 | |
| 319 | In many cases, even if a file was compiled with no special options for |
| 320 | debugging at all, as long as was not stripped it will contain sufficient |
| 321 | information to build a useful minimal symbol table using this structure. |
| 322 | Even when a file contains enough debugging information to build a full |
| 323 | symbol table, these minimal symbols are still useful for quickly mapping |
| 324 | between names and addresses, and vice versa. They are also sometimes |
| 325 | used to figure out what full symbol table entries need to be read in. */ |
| 326 | |
| 327 | struct minimal_symbol |
| 328 | { |
| 329 | |
| 330 | /* The general symbol info required for all types of symbols. |
| 331 | |
| 332 | The SYMBOL_VALUE_ADDRESS contains the address that this symbol |
| 333 | corresponds to. */ |
| 334 | |
| 335 | struct general_symbol_info ginfo; |
| 336 | |
| 337 | /* Size of this symbol. end_psymtab in dbxread.c uses this |
| 338 | information to calculate the end of the partial symtab based on the |
| 339 | address of the last symbol plus the size of the last symbol. */ |
| 340 | |
| 341 | unsigned long size; |
| 342 | |
| 343 | /* Which source file is this symbol in? Only relevant for mst_file_*. */ |
| 344 | const char *filename; |
| 345 | |
| 346 | /* Classification type for this minimal symbol. */ |
| 347 | |
| 348 | ENUM_BITFIELD(minimal_symbol_type) type : 8; |
| 349 | |
| 350 | /* Non-zero if this symbol was created by gdb. |
| 351 | Such symbols do not appear in the output of "info var|fun". */ |
| 352 | unsigned int created_by_gdb : 1; |
| 353 | |
| 354 | /* Two flag bits provided for the use of the target. */ |
| 355 | unsigned int target_flag_1 : 1; |
| 356 | unsigned int target_flag_2 : 1; |
| 357 | |
| 358 | /* Nonzero iff the size of the minimal symbol has been set. |
| 359 | Symbol size information can sometimes not be determined, because |
| 360 | the object file format may not carry that piece of information. */ |
| 361 | unsigned int has_size : 1; |
| 362 | |
| 363 | /* Minimal symbols with the same hash key are kept on a linked |
| 364 | list. This is the link. */ |
| 365 | |
| 366 | struct minimal_symbol *hash_next; |
| 367 | |
| 368 | /* Minimal symbols are stored in two different hash tables. This is |
| 369 | the `next' pointer for the demangled hash table. */ |
| 370 | |
| 371 | struct minimal_symbol *demangled_hash_next; |
| 372 | }; |
| 373 | |
| 374 | #define MSYMBOL_TARGET_FLAG_1(msymbol) (msymbol)->target_flag_1 |
| 375 | #define MSYMBOL_TARGET_FLAG_2(msymbol) (msymbol)->target_flag_2 |
| 376 | #define MSYMBOL_SIZE(msymbol) ((msymbol)->size + 0) |
| 377 | #define SET_MSYMBOL_SIZE(msymbol, sz) \ |
| 378 | do \ |
| 379 | { \ |
| 380 | (msymbol)->size = sz; \ |
| 381 | (msymbol)->has_size = 1; \ |
| 382 | } while (0) |
| 383 | #define MSYMBOL_HAS_SIZE(msymbol) ((msymbol)->has_size + 0) |
| 384 | #define MSYMBOL_TYPE(msymbol) (msymbol)->type |
| 385 | |
| 386 | #include "minsyms.h" |
| 387 | |
| 388 | \f |
| 389 | |
| 390 | /* Represent one symbol name; a variable, constant, function or typedef. */ |
| 391 | |
| 392 | /* Different name domains for symbols. Looking up a symbol specifies a |
| 393 | domain and ignores symbol definitions in other name domains. */ |
| 394 | |
| 395 | typedef enum domain_enum_tag |
| 396 | { |
| 397 | /* UNDEF_DOMAIN is used when a domain has not been discovered or |
| 398 | none of the following apply. This usually indicates an error either |
| 399 | in the symbol information or in gdb's handling of symbols. */ |
| 400 | |
| 401 | UNDEF_DOMAIN, |
| 402 | |
| 403 | /* VAR_DOMAIN is the usual domain. In C, this contains variables, |
| 404 | function names, typedef names and enum type values. */ |
| 405 | |
| 406 | VAR_DOMAIN, |
| 407 | |
| 408 | /* STRUCT_DOMAIN is used in C to hold struct, union and enum type names. |
| 409 | Thus, if `struct foo' is used in a C program, it produces a symbol named |
| 410 | `foo' in the STRUCT_DOMAIN. */ |
| 411 | |
| 412 | STRUCT_DOMAIN, |
| 413 | |
| 414 | /* LABEL_DOMAIN may be used for names of labels (for gotos). */ |
| 415 | |
| 416 | LABEL_DOMAIN, |
| 417 | |
| 418 | /* Fortran common blocks. Their naming must be separate from VAR_DOMAIN. */ |
| 419 | COMMON_BLOCK_DOMAIN |
| 420 | } domain_enum; |
| 421 | |
| 422 | /* Searching domains, used for `search_symbols'. Element numbers are |
| 423 | hardcoded in GDB, check all enum uses before changing it. */ |
| 424 | |
| 425 | enum search_domain |
| 426 | { |
| 427 | /* Everything in VAR_DOMAIN minus FUNCTIONS_DOMAIN and |
| 428 | TYPES_DOMAIN. */ |
| 429 | VARIABLES_DOMAIN = 0, |
| 430 | |
| 431 | /* All functions -- for some reason not methods, though. */ |
| 432 | FUNCTIONS_DOMAIN = 1, |
| 433 | |
| 434 | /* All defined types */ |
| 435 | TYPES_DOMAIN = 2, |
| 436 | |
| 437 | /* Any type. */ |
| 438 | ALL_DOMAIN = 3 |
| 439 | }; |
| 440 | |
| 441 | /* An address-class says where to find the value of a symbol. */ |
| 442 | |
| 443 | enum address_class |
| 444 | { |
| 445 | /* Not used; catches errors. */ |
| 446 | |
| 447 | LOC_UNDEF, |
| 448 | |
| 449 | /* Value is constant int SYMBOL_VALUE, host byteorder. */ |
| 450 | |
| 451 | LOC_CONST, |
| 452 | |
| 453 | /* Value is at fixed address SYMBOL_VALUE_ADDRESS. */ |
| 454 | |
| 455 | LOC_STATIC, |
| 456 | |
| 457 | /* Value is in register. SYMBOL_VALUE is the register number |
| 458 | in the original debug format. SYMBOL_REGISTER_OPS holds a |
| 459 | function that can be called to transform this into the |
| 460 | actual register number this represents in a specific target |
| 461 | architecture (gdbarch). |
| 462 | |
| 463 | For some symbol formats (stabs, for some compilers at least), |
| 464 | the compiler generates two symbols, an argument and a register. |
| 465 | In some cases we combine them to a single LOC_REGISTER in symbol |
| 466 | reading, but currently not for all cases (e.g. it's passed on the |
| 467 | stack and then loaded into a register). */ |
| 468 | |
| 469 | LOC_REGISTER, |
| 470 | |
| 471 | /* It's an argument; the value is at SYMBOL_VALUE offset in arglist. */ |
| 472 | |
| 473 | LOC_ARG, |
| 474 | |
| 475 | /* Value address is at SYMBOL_VALUE offset in arglist. */ |
| 476 | |
| 477 | LOC_REF_ARG, |
| 478 | |
| 479 | /* Value is in specified register. Just like LOC_REGISTER except the |
| 480 | register holds the address of the argument instead of the argument |
| 481 | itself. This is currently used for the passing of structs and unions |
| 482 | on sparc and hppa. It is also used for call by reference where the |
| 483 | address is in a register, at least by mipsread.c. */ |
| 484 | |
| 485 | LOC_REGPARM_ADDR, |
| 486 | |
| 487 | /* Value is a local variable at SYMBOL_VALUE offset in stack frame. */ |
| 488 | |
| 489 | LOC_LOCAL, |
| 490 | |
| 491 | /* Value not used; definition in SYMBOL_TYPE. Symbols in the domain |
| 492 | STRUCT_DOMAIN all have this class. */ |
| 493 | |
| 494 | LOC_TYPEDEF, |
| 495 | |
| 496 | /* Value is address SYMBOL_VALUE_ADDRESS in the code. */ |
| 497 | |
| 498 | LOC_LABEL, |
| 499 | |
| 500 | /* In a symbol table, value is SYMBOL_BLOCK_VALUE of a `struct block'. |
| 501 | In a partial symbol table, SYMBOL_VALUE_ADDRESS is the start address |
| 502 | of the block. Function names have this class. */ |
| 503 | |
| 504 | LOC_BLOCK, |
| 505 | |
| 506 | /* Value is a constant byte-sequence pointed to by SYMBOL_VALUE_BYTES, in |
| 507 | target byte order. */ |
| 508 | |
| 509 | LOC_CONST_BYTES, |
| 510 | |
| 511 | /* Value is at fixed address, but the address of the variable has |
| 512 | to be determined from the minimal symbol table whenever the |
| 513 | variable is referenced. |
| 514 | This happens if debugging information for a global symbol is |
| 515 | emitted and the corresponding minimal symbol is defined |
| 516 | in another object file or runtime common storage. |
| 517 | The linker might even remove the minimal symbol if the global |
| 518 | symbol is never referenced, in which case the symbol remains |
| 519 | unresolved. |
| 520 | |
| 521 | GDB would normally find the symbol in the minimal symbol table if it will |
| 522 | not find it in the full symbol table. But a reference to an external |
| 523 | symbol in a local block shadowing other definition requires full symbol |
| 524 | without possibly having its address available for LOC_STATIC. Testcase |
| 525 | is provided as `gdb.dwarf2/dw2-unresolved.exp'. */ |
| 526 | |
| 527 | LOC_UNRESOLVED, |
| 528 | |
| 529 | /* The variable does not actually exist in the program. |
| 530 | The value is ignored. */ |
| 531 | |
| 532 | LOC_OPTIMIZED_OUT, |
| 533 | |
| 534 | /* The variable's address is computed by a set of location |
| 535 | functions (see "struct symbol_computed_ops" below). */ |
| 536 | LOC_COMPUTED, |
| 537 | }; |
| 538 | |
| 539 | /* The methods needed to implement LOC_COMPUTED. These methods can |
| 540 | use the symbol's .aux_value for additional per-symbol information. |
| 541 | |
| 542 | At present this is only used to implement location expressions. */ |
| 543 | |
| 544 | struct symbol_computed_ops |
| 545 | { |
| 546 | |
| 547 | /* Return the value of the variable SYMBOL, relative to the stack |
| 548 | frame FRAME. If the variable has been optimized out, return |
| 549 | zero. |
| 550 | |
| 551 | Iff `read_needs_frame (SYMBOL)' is zero, then FRAME may be zero. */ |
| 552 | |
| 553 | struct value *(*read_variable) (struct symbol * symbol, |
| 554 | struct frame_info * frame); |
| 555 | |
| 556 | /* Read variable SYMBOL like read_variable at (callee) FRAME's function |
| 557 | entry. SYMBOL should be a function parameter, otherwise |
| 558 | NO_ENTRY_VALUE_ERROR will be thrown. */ |
| 559 | struct value *(*read_variable_at_entry) (struct symbol *symbol, |
| 560 | struct frame_info *frame); |
| 561 | |
| 562 | /* Return non-zero if we need a frame to find the value of the SYMBOL. */ |
| 563 | int (*read_needs_frame) (struct symbol * symbol); |
| 564 | |
| 565 | /* Write to STREAM a natural-language description of the location of |
| 566 | SYMBOL, in the context of ADDR. */ |
| 567 | void (*describe_location) (struct symbol * symbol, CORE_ADDR addr, |
| 568 | struct ui_file * stream); |
| 569 | |
| 570 | /* Tracepoint support. Append bytecodes to the tracepoint agent |
| 571 | expression AX that push the address of the object SYMBOL. Set |
| 572 | VALUE appropriately. Note --- for objects in registers, this |
| 573 | needn't emit any code; as long as it sets VALUE properly, then |
| 574 | the caller will generate the right code in the process of |
| 575 | treating this as an lvalue or rvalue. */ |
| 576 | |
| 577 | void (*tracepoint_var_ref) (struct symbol *symbol, struct gdbarch *gdbarch, |
| 578 | struct agent_expr *ax, struct axs_value *value); |
| 579 | }; |
| 580 | |
| 581 | /* Functions used with LOC_REGISTER and LOC_REGPARM_ADDR. */ |
| 582 | |
| 583 | struct symbol_register_ops |
| 584 | { |
| 585 | int (*register_number) (struct symbol *symbol, struct gdbarch *gdbarch); |
| 586 | }; |
| 587 | |
| 588 | /* This structure is space critical. See space comments at the top. */ |
| 589 | |
| 590 | struct symbol |
| 591 | { |
| 592 | |
| 593 | /* The general symbol info required for all types of symbols. */ |
| 594 | |
| 595 | struct general_symbol_info ginfo; |
| 596 | |
| 597 | /* Data type of value */ |
| 598 | |
| 599 | struct type *type; |
| 600 | |
| 601 | /* The symbol table containing this symbol. This is the file |
| 602 | associated with LINE. It can be NULL during symbols read-in but it is |
| 603 | never NULL during normal operation. */ |
| 604 | struct symtab *symtab; |
| 605 | |
| 606 | /* Domain code. */ |
| 607 | |
| 608 | ENUM_BITFIELD(domain_enum_tag) domain : 6; |
| 609 | |
| 610 | /* Address class */ |
| 611 | /* NOTE: cagney/2003-11-02: The fields "aclass" and "ops" contain |
| 612 | overlapping information. By creating a per-aclass ops vector, or |
| 613 | using the aclass as an index into an ops table, the aclass and |
| 614 | ops fields can be merged. The latter, for instance, would shave |
| 615 | 32-bits from each symbol (relative to a symbol lookup, any table |
| 616 | index overhead would be in the noise). */ |
| 617 | |
| 618 | ENUM_BITFIELD(address_class) aclass : 6; |
| 619 | |
| 620 | /* Whether this is an argument. */ |
| 621 | |
| 622 | unsigned is_argument : 1; |
| 623 | |
| 624 | /* Whether this is an inlined function (class LOC_BLOCK only). */ |
| 625 | unsigned is_inlined : 1; |
| 626 | |
| 627 | /* True if this is a C++ function symbol with template arguments. |
| 628 | In this case the symbol is really a "struct template_symbol". */ |
| 629 | unsigned is_cplus_template_function : 1; |
| 630 | |
| 631 | /* Line number of this symbol's definition, except for inlined |
| 632 | functions. For an inlined function (class LOC_BLOCK and |
| 633 | SYMBOL_INLINED set) this is the line number of the function's call |
| 634 | site. Inlined function symbols are not definitions, and they are |
| 635 | never found by symbol table lookup. |
| 636 | |
| 637 | FIXME: Should we really make the assumption that nobody will try |
| 638 | to debug files longer than 64K lines? What about machine |
| 639 | generated programs? */ |
| 640 | |
| 641 | unsigned short line; |
| 642 | |
| 643 | /* Method's for symbol's of this class. */ |
| 644 | /* NOTE: cagney/2003-11-02: See comment above attached to "aclass". */ |
| 645 | |
| 646 | union |
| 647 | { |
| 648 | /* Used with LOC_COMPUTED. */ |
| 649 | const struct symbol_computed_ops *ops_computed; |
| 650 | |
| 651 | /* Used with LOC_REGISTER and LOC_REGPARM_ADDR. */ |
| 652 | const struct symbol_register_ops *ops_register; |
| 653 | } ops; |
| 654 | |
| 655 | /* An arbitrary data pointer, allowing symbol readers to record |
| 656 | additional information on a per-symbol basis. Note that this data |
| 657 | must be allocated using the same obstack as the symbol itself. */ |
| 658 | /* So far it is only used by LOC_COMPUTED to |
| 659 | find the location information. For a LOC_BLOCK symbol |
| 660 | for a function in a compilation unit compiled with DWARF 2 |
| 661 | information, this is information used internally by the DWARF 2 |
| 662 | code --- specifically, the location expression for the frame |
| 663 | base for this function. */ |
| 664 | /* FIXME drow/2003-02-21: For the LOC_BLOCK case, it might be better |
| 665 | to add a magic symbol to the block containing this information, |
| 666 | or to have a generic debug info annotation slot for symbols. */ |
| 667 | |
| 668 | void *aux_value; |
| 669 | |
| 670 | struct symbol *hash_next; |
| 671 | }; |
| 672 | |
| 673 | |
| 674 | #define SYMBOL_DOMAIN(symbol) (symbol)->domain |
| 675 | #define SYMBOL_CLASS(symbol) (symbol)->aclass |
| 676 | #define SYMBOL_IS_ARGUMENT(symbol) (symbol)->is_argument |
| 677 | #define SYMBOL_INLINED(symbol) (symbol)->is_inlined |
| 678 | #define SYMBOL_IS_CPLUS_TEMPLATE_FUNCTION(symbol) \ |
| 679 | (symbol)->is_cplus_template_function |
| 680 | #define SYMBOL_TYPE(symbol) (symbol)->type |
| 681 | #define SYMBOL_LINE(symbol) (symbol)->line |
| 682 | #define SYMBOL_SYMTAB(symbol) (symbol)->symtab |
| 683 | #define SYMBOL_COMPUTED_OPS(symbol) (symbol)->ops.ops_computed |
| 684 | #define SYMBOL_REGISTER_OPS(symbol) (symbol)->ops.ops_register |
| 685 | #define SYMBOL_LOCATION_BATON(symbol) (symbol)->aux_value |
| 686 | |
| 687 | /* An instance of this type is used to represent a C++ template |
| 688 | function. It includes a "struct symbol" as a kind of base class; |
| 689 | users downcast to "struct template_symbol *" when needed. A symbol |
| 690 | is really of this type iff SYMBOL_IS_CPLUS_TEMPLATE_FUNCTION is |
| 691 | true. */ |
| 692 | |
| 693 | struct template_symbol |
| 694 | { |
| 695 | /* The base class. */ |
| 696 | struct symbol base; |
| 697 | |
| 698 | /* The number of template arguments. */ |
| 699 | int n_template_arguments; |
| 700 | |
| 701 | /* The template arguments. This is an array with |
| 702 | N_TEMPLATE_ARGUMENTS elements. */ |
| 703 | struct symbol **template_arguments; |
| 704 | }; |
| 705 | |
| 706 | \f |
| 707 | /* Each item represents a line-->pc (or the reverse) mapping. This is |
| 708 | somewhat more wasteful of space than one might wish, but since only |
| 709 | the files which are actually debugged are read in to core, we don't |
| 710 | waste much space. */ |
| 711 | |
| 712 | struct linetable_entry |
| 713 | { |
| 714 | int line; |
| 715 | CORE_ADDR pc; |
| 716 | }; |
| 717 | |
| 718 | /* The order of entries in the linetable is significant. They should |
| 719 | be sorted by increasing values of the pc field. If there is more than |
| 720 | one entry for a given pc, then I'm not sure what should happen (and |
| 721 | I not sure whether we currently handle it the best way). |
| 722 | |
| 723 | Example: a C for statement generally looks like this |
| 724 | |
| 725 | 10 0x100 - for the init/test part of a for stmt. |
| 726 | 20 0x200 |
| 727 | 30 0x300 |
| 728 | 10 0x400 - for the increment part of a for stmt. |
| 729 | |
| 730 | If an entry has a line number of zero, it marks the start of a PC |
| 731 | range for which no line number information is available. It is |
| 732 | acceptable, though wasteful of table space, for such a range to be |
| 733 | zero length. */ |
| 734 | |
| 735 | struct linetable |
| 736 | { |
| 737 | int nitems; |
| 738 | |
| 739 | /* Actually NITEMS elements. If you don't like this use of the |
| 740 | `struct hack', you can shove it up your ANSI (seriously, if the |
| 741 | committee tells us how to do it, we can probably go along). */ |
| 742 | struct linetable_entry item[1]; |
| 743 | }; |
| 744 | |
| 745 | /* How to relocate the symbols from each section in a symbol file. |
| 746 | Each struct contains an array of offsets. |
| 747 | The ordering and meaning of the offsets is file-type-dependent; |
| 748 | typically it is indexed by section numbers or symbol types or |
| 749 | something like that. |
| 750 | |
| 751 | To give us flexibility in changing the internal representation |
| 752 | of these offsets, the ANOFFSET macro must be used to insert and |
| 753 | extract offset values in the struct. */ |
| 754 | |
| 755 | struct section_offsets |
| 756 | { |
| 757 | CORE_ADDR offsets[1]; /* As many as needed. */ |
| 758 | }; |
| 759 | |
| 760 | #define ANOFFSET(secoff, whichone) \ |
| 761 | ((whichone == -1) \ |
| 762 | ? (internal_error (__FILE__, __LINE__, \ |
| 763 | _("Section index is uninitialized")), -1) \ |
| 764 | : secoff->offsets[whichone]) |
| 765 | |
| 766 | /* The size of a section_offsets table for N sections. */ |
| 767 | #define SIZEOF_N_SECTION_OFFSETS(n) \ |
| 768 | (sizeof (struct section_offsets) \ |
| 769 | + sizeof (((struct section_offsets *) 0)->offsets) * ((n)-1)) |
| 770 | |
| 771 | /* Each source file or header is represented by a struct symtab. |
| 772 | These objects are chained through the `next' field. */ |
| 773 | |
| 774 | struct symtab |
| 775 | { |
| 776 | /* Unordered chain of all existing symtabs of this objfile. */ |
| 777 | |
| 778 | struct symtab *next; |
| 779 | |
| 780 | /* List of all symbol scope blocks for this symtab. May be shared |
| 781 | between different symtabs (and normally is for all the symtabs |
| 782 | in a given compilation unit). */ |
| 783 | |
| 784 | struct blockvector *blockvector; |
| 785 | |
| 786 | /* Table mapping core addresses to line numbers for this file. |
| 787 | Can be NULL if none. Never shared between different symtabs. */ |
| 788 | |
| 789 | struct linetable *linetable; |
| 790 | |
| 791 | /* Section in objfile->section_offsets for the blockvector and |
| 792 | the linetable. Probably always SECT_OFF_TEXT. */ |
| 793 | |
| 794 | int block_line_section; |
| 795 | |
| 796 | /* If several symtabs share a blockvector, exactly one of them |
| 797 | should be designated the primary, so that the blockvector |
| 798 | is relocated exactly once by objfile_relocate. */ |
| 799 | |
| 800 | unsigned int primary : 1; |
| 801 | |
| 802 | /* Symtab has been compiled with both optimizations and debug info so that |
| 803 | GDB may stop skipping prologues as variables locations are valid already |
| 804 | at function entry points. */ |
| 805 | |
| 806 | unsigned int locations_valid : 1; |
| 807 | |
| 808 | /* DWARF unwinder for this CU is valid even for epilogues (PC at the return |
| 809 | instruction). This is supported by GCC since 4.5.0. */ |
| 810 | |
| 811 | unsigned int epilogue_unwind_valid : 1; |
| 812 | |
| 813 | /* The macro table for this symtab. Like the blockvector, this |
| 814 | may be shared between different symtabs --- and normally is for |
| 815 | all the symtabs in a given compilation unit. */ |
| 816 | struct macro_table *macro_table; |
| 817 | |
| 818 | /* Name of this source file. */ |
| 819 | |
| 820 | char *filename; |
| 821 | |
| 822 | /* Directory in which it was compiled, or NULL if we don't know. */ |
| 823 | |
| 824 | char *dirname; |
| 825 | |
| 826 | /* Total number of lines found in source file. */ |
| 827 | |
| 828 | int nlines; |
| 829 | |
| 830 | /* line_charpos[N] is the position of the (N-1)th line of the |
| 831 | source file. "position" means something we can lseek() to; it |
| 832 | is not guaranteed to be useful any other way. */ |
| 833 | |
| 834 | int *line_charpos; |
| 835 | |
| 836 | /* Language of this source file. */ |
| 837 | |
| 838 | enum language language; |
| 839 | |
| 840 | /* String that identifies the format of the debugging information, such |
| 841 | as "stabs", "dwarf 1", "dwarf 2", "coff", etc. This is mostly useful |
| 842 | for automated testing of gdb but may also be information that is |
| 843 | useful to the user. */ |
| 844 | |
| 845 | const char *debugformat; |
| 846 | |
| 847 | /* String of producer version information. May be zero. */ |
| 848 | |
| 849 | const char *producer; |
| 850 | |
| 851 | /* Full name of file as found by searching the source path. |
| 852 | NULL if not yet known. */ |
| 853 | |
| 854 | char *fullname; |
| 855 | |
| 856 | /* Object file from which this symbol information was read. */ |
| 857 | |
| 858 | struct objfile *objfile; |
| 859 | |
| 860 | /* struct call_site entries for this compilation unit or NULL. */ |
| 861 | |
| 862 | htab_t call_site_htab; |
| 863 | |
| 864 | /* If non-NULL, then this points to a NULL-terminated vector of |
| 865 | included symbol tables. When searching the static or global |
| 866 | block of this symbol table, the corresponding block of all |
| 867 | included symbol tables will also be searched. Note that this |
| 868 | list must be flattened -- the symbol reader is responsible for |
| 869 | ensuring that this vector contains the transitive closure of all |
| 870 | included symbol tables. */ |
| 871 | |
| 872 | struct symtab **includes; |
| 873 | |
| 874 | /* If this is an included symbol table, this points to one includer |
| 875 | of the table. This user is considered the canonical symbol table |
| 876 | containing this one. An included symbol table may itself be |
| 877 | included by another. */ |
| 878 | |
| 879 | struct symtab *user; |
| 880 | }; |
| 881 | |
| 882 | #define BLOCKVECTOR(symtab) (symtab)->blockvector |
| 883 | #define LINETABLE(symtab) (symtab)->linetable |
| 884 | #define SYMTAB_PSPACE(symtab) (symtab)->objfile->pspace |
| 885 | \f |
| 886 | |
| 887 | /* The virtual function table is now an array of structures which have the |
| 888 | form { int16 offset, delta; void *pfn; }. |
| 889 | |
| 890 | In normal virtual function tables, OFFSET is unused. |
| 891 | DELTA is the amount which is added to the apparent object's base |
| 892 | address in order to point to the actual object to which the |
| 893 | virtual function should be applied. |
| 894 | PFN is a pointer to the virtual function. |
| 895 | |
| 896 | Note that this macro is g++ specific (FIXME). */ |
| 897 | |
| 898 | #define VTBL_FNADDR_OFFSET 2 |
| 899 | |
| 900 | /* External variables and functions for the objects described above. */ |
| 901 | |
| 902 | /* True if we are nested inside psymtab_to_symtab. */ |
| 903 | |
| 904 | extern int currently_reading_symtab; |
| 905 | |
| 906 | /* symtab.c lookup functions */ |
| 907 | |
| 908 | extern const char multiple_symbols_ask[]; |
| 909 | extern const char multiple_symbols_all[]; |
| 910 | extern const char multiple_symbols_cancel[]; |
| 911 | |
| 912 | const char *multiple_symbols_select_mode (void); |
| 913 | |
| 914 | int symbol_matches_domain (enum language symbol_language, |
| 915 | domain_enum symbol_domain, |
| 916 | domain_enum domain); |
| 917 | |
| 918 | /* lookup a symbol table by source file name. */ |
| 919 | |
| 920 | extern struct symtab *lookup_symtab (const char *); |
| 921 | |
| 922 | /* An object of this type is passed as the 'is_a_field_of_this' |
| 923 | argument to lookup_symbol and lookup_symbol_in_language. */ |
| 924 | |
| 925 | struct field_of_this_result |
| 926 | { |
| 927 | /* The type in which the field was found. If this is NULL then the |
| 928 | symbol was not found in 'this'. If non-NULL, then one of the |
| 929 | other fields will be non-NULL as well. */ |
| 930 | |
| 931 | struct type *type; |
| 932 | |
| 933 | /* If the symbol was found as an ordinary field of 'this', then this |
| 934 | is non-NULL and points to the particular field. */ |
| 935 | |
| 936 | struct field *field; |
| 937 | |
| 938 | /* If the symbol was found as an function field of 'this', then this |
| 939 | is non-NULL and points to the particular field. */ |
| 940 | |
| 941 | struct fn_fieldlist *fn_field; |
| 942 | }; |
| 943 | |
| 944 | /* lookup a symbol by name (optional block) in language. */ |
| 945 | |
| 946 | extern struct symbol *lookup_symbol_in_language (const char *, |
| 947 | const struct block *, |
| 948 | const domain_enum, |
| 949 | enum language, |
| 950 | struct field_of_this_result *); |
| 951 | |
| 952 | /* lookup a symbol by name (optional block, optional symtab) |
| 953 | in the current language. */ |
| 954 | |
| 955 | extern struct symbol *lookup_symbol (const char *, const struct block *, |
| 956 | const domain_enum, |
| 957 | struct field_of_this_result *); |
| 958 | |
| 959 | /* A default version of lookup_symbol_nonlocal for use by languages |
| 960 | that can't think of anything better to do. */ |
| 961 | |
| 962 | extern struct symbol *basic_lookup_symbol_nonlocal (const char *, |
| 963 | const struct block *, |
| 964 | const domain_enum); |
| 965 | |
| 966 | /* Some helper functions for languages that need to write their own |
| 967 | lookup_symbol_nonlocal functions. */ |
| 968 | |
| 969 | /* Lookup a symbol in the static block associated to BLOCK, if there |
| 970 | is one; do nothing if BLOCK is NULL or a global block. */ |
| 971 | |
| 972 | extern struct symbol *lookup_symbol_static (const char *name, |
| 973 | const struct block *block, |
| 974 | const domain_enum domain); |
| 975 | |
| 976 | /* Lookup a symbol in all files' global blocks (searching psymtabs if |
| 977 | necessary). */ |
| 978 | |
| 979 | extern struct symbol *lookup_symbol_global (const char *name, |
| 980 | const struct block *block, |
| 981 | const domain_enum domain); |
| 982 | |
| 983 | /* Lookup a symbol within the block BLOCK. This, unlike |
| 984 | lookup_symbol_block, will set SYMTAB and BLOCK_FOUND correctly, and |
| 985 | will fix up the symbol if necessary. */ |
| 986 | |
| 987 | extern struct symbol *lookup_symbol_aux_block (const char *name, |
| 988 | const struct block *block, |
| 989 | const domain_enum domain); |
| 990 | |
| 991 | extern struct symbol *lookup_language_this (const struct language_defn *lang, |
| 992 | const struct block *block); |
| 993 | |
| 994 | /* Lookup a symbol only in the file static scope of all the objfiles. */ |
| 995 | |
| 996 | struct symbol *lookup_static_symbol_aux (const char *name, |
| 997 | const domain_enum domain); |
| 998 | |
| 999 | |
| 1000 | /* lookup a symbol by name, within a specified block. */ |
| 1001 | |
| 1002 | extern struct symbol *lookup_block_symbol (const struct block *, const char *, |
| 1003 | const domain_enum); |
| 1004 | |
| 1005 | /* lookup a [struct, union, enum] by name, within a specified block. */ |
| 1006 | |
| 1007 | extern struct type *lookup_struct (const char *, const struct block *); |
| 1008 | |
| 1009 | extern struct type *lookup_union (const char *, const struct block *); |
| 1010 | |
| 1011 | extern struct type *lookup_enum (const char *, const struct block *); |
| 1012 | |
| 1013 | /* from blockframe.c: */ |
| 1014 | |
| 1015 | /* lookup the function symbol corresponding to the address. */ |
| 1016 | |
| 1017 | extern struct symbol *find_pc_function (CORE_ADDR); |
| 1018 | |
| 1019 | /* lookup the function corresponding to the address and section. */ |
| 1020 | |
| 1021 | extern struct symbol *find_pc_sect_function (CORE_ADDR, struct obj_section *); |
| 1022 | |
| 1023 | extern int find_pc_partial_function_gnu_ifunc (CORE_ADDR pc, const char **name, |
| 1024 | CORE_ADDR *address, |
| 1025 | CORE_ADDR *endaddr, |
| 1026 | int *is_gnu_ifunc_p); |
| 1027 | |
| 1028 | /* lookup function from address, return name, start addr and end addr. */ |
| 1029 | |
| 1030 | extern int find_pc_partial_function (CORE_ADDR, const char **, CORE_ADDR *, |
| 1031 | CORE_ADDR *); |
| 1032 | |
| 1033 | extern void clear_pc_function_cache (void); |
| 1034 | |
| 1035 | /* lookup partial symbol table by address and section. */ |
| 1036 | |
| 1037 | extern struct symtab *find_pc_sect_symtab_via_partial (CORE_ADDR, |
| 1038 | struct obj_section *); |
| 1039 | |
| 1040 | /* lookup full symbol table by address. */ |
| 1041 | |
| 1042 | extern struct symtab *find_pc_symtab (CORE_ADDR); |
| 1043 | |
| 1044 | /* lookup full symbol table by address and section. */ |
| 1045 | |
| 1046 | extern struct symtab *find_pc_sect_symtab (CORE_ADDR, struct obj_section *); |
| 1047 | |
| 1048 | extern int find_pc_line_pc_range (CORE_ADDR, CORE_ADDR *, CORE_ADDR *); |
| 1049 | |
| 1050 | extern void reread_symbols (void); |
| 1051 | |
| 1052 | extern struct type *lookup_transparent_type (const char *); |
| 1053 | extern struct type *basic_lookup_transparent_type (const char *); |
| 1054 | |
| 1055 | |
| 1056 | /* Macro for name of symbol to indicate a file compiled with gcc. */ |
| 1057 | #ifndef GCC_COMPILED_FLAG_SYMBOL |
| 1058 | #define GCC_COMPILED_FLAG_SYMBOL "gcc_compiled." |
| 1059 | #endif |
| 1060 | |
| 1061 | /* Macro for name of symbol to indicate a file compiled with gcc2. */ |
| 1062 | #ifndef GCC2_COMPILED_FLAG_SYMBOL |
| 1063 | #define GCC2_COMPILED_FLAG_SYMBOL "gcc2_compiled." |
| 1064 | #endif |
| 1065 | |
| 1066 | extern int in_gnu_ifunc_stub (CORE_ADDR pc); |
| 1067 | |
| 1068 | /* Functions for resolving STT_GNU_IFUNC symbols which are implemented only |
| 1069 | for ELF symbol files. */ |
| 1070 | |
| 1071 | struct gnu_ifunc_fns |
| 1072 | { |
| 1073 | /* See elf_gnu_ifunc_resolve_addr for its real implementation. */ |
| 1074 | CORE_ADDR (*gnu_ifunc_resolve_addr) (struct gdbarch *gdbarch, CORE_ADDR pc); |
| 1075 | |
| 1076 | /* See elf_gnu_ifunc_resolve_name for its real implementation. */ |
| 1077 | int (*gnu_ifunc_resolve_name) (const char *function_name, |
| 1078 | CORE_ADDR *function_address_p); |
| 1079 | |
| 1080 | /* See elf_gnu_ifunc_resolver_stop for its real implementation. */ |
| 1081 | void (*gnu_ifunc_resolver_stop) (struct breakpoint *b); |
| 1082 | |
| 1083 | /* See elf_gnu_ifunc_resolver_return_stop for its real implementation. */ |
| 1084 | void (*gnu_ifunc_resolver_return_stop) (struct breakpoint *b); |
| 1085 | }; |
| 1086 | |
| 1087 | #define gnu_ifunc_resolve_addr gnu_ifunc_fns_p->gnu_ifunc_resolve_addr |
| 1088 | #define gnu_ifunc_resolve_name gnu_ifunc_fns_p->gnu_ifunc_resolve_name |
| 1089 | #define gnu_ifunc_resolver_stop gnu_ifunc_fns_p->gnu_ifunc_resolver_stop |
| 1090 | #define gnu_ifunc_resolver_return_stop \ |
| 1091 | gnu_ifunc_fns_p->gnu_ifunc_resolver_return_stop |
| 1092 | |
| 1093 | extern const struct gnu_ifunc_fns *gnu_ifunc_fns_p; |
| 1094 | |
| 1095 | extern CORE_ADDR find_solib_trampoline_target (struct frame_info *, CORE_ADDR); |
| 1096 | |
| 1097 | struct symtab_and_line |
| 1098 | { |
| 1099 | /* The program space of this sal. */ |
| 1100 | struct program_space *pspace; |
| 1101 | |
| 1102 | struct symtab *symtab; |
| 1103 | struct obj_section *section; |
| 1104 | /* Line number. Line numbers start at 1 and proceed through symtab->nlines. |
| 1105 | 0 is never a valid line number; it is used to indicate that line number |
| 1106 | information is not available. */ |
| 1107 | int line; |
| 1108 | |
| 1109 | CORE_ADDR pc; |
| 1110 | CORE_ADDR end; |
| 1111 | int explicit_pc; |
| 1112 | int explicit_line; |
| 1113 | |
| 1114 | /* The probe associated with this symtab_and_line. */ |
| 1115 | struct probe *probe; |
| 1116 | }; |
| 1117 | |
| 1118 | extern void init_sal (struct symtab_and_line *sal); |
| 1119 | |
| 1120 | struct symtabs_and_lines |
| 1121 | { |
| 1122 | struct symtab_and_line *sals; |
| 1123 | int nelts; |
| 1124 | }; |
| 1125 | \f |
| 1126 | |
| 1127 | |
| 1128 | /* Some types and macros needed for exception catchpoints. |
| 1129 | Can't put these in target.h because symtab_and_line isn't |
| 1130 | known there. This file will be included by breakpoint.c, |
| 1131 | hppa-tdep.c, etc. */ |
| 1132 | |
| 1133 | /* Enums for exception-handling support. */ |
| 1134 | enum exception_event_kind |
| 1135 | { |
| 1136 | EX_EVENT_THROW, |
| 1137 | EX_EVENT_CATCH |
| 1138 | }; |
| 1139 | |
| 1140 | \f |
| 1141 | |
| 1142 | /* Given a pc value, return line number it is in. Second arg nonzero means |
| 1143 | if pc is on the boundary use the previous statement's line number. */ |
| 1144 | |
| 1145 | extern struct symtab_and_line find_pc_line (CORE_ADDR, int); |
| 1146 | |
| 1147 | /* Same function, but specify a section as well as an address. */ |
| 1148 | |
| 1149 | extern struct symtab_and_line find_pc_sect_line (CORE_ADDR, |
| 1150 | struct obj_section *, int); |
| 1151 | |
| 1152 | /* Given a symtab and line number, return the pc there. */ |
| 1153 | |
| 1154 | extern int find_line_pc (struct symtab *, int, CORE_ADDR *); |
| 1155 | |
| 1156 | extern int find_line_pc_range (struct symtab_and_line, CORE_ADDR *, |
| 1157 | CORE_ADDR *); |
| 1158 | |
| 1159 | extern void resolve_sal_pc (struct symtab_and_line *); |
| 1160 | |
| 1161 | /* Symmisc.c */ |
| 1162 | |
| 1163 | void maintenance_print_symbols (char *, int); |
| 1164 | |
| 1165 | void maintenance_print_psymbols (char *, int); |
| 1166 | |
| 1167 | void maintenance_print_msymbols (char *, int); |
| 1168 | |
| 1169 | void maintenance_print_objfiles (char *, int); |
| 1170 | |
| 1171 | void maintenance_info_symtabs (char *, int); |
| 1172 | |
| 1173 | void maintenance_info_psymtabs (char *, int); |
| 1174 | |
| 1175 | void maintenance_check_symtabs (char *, int); |
| 1176 | |
| 1177 | /* maint.c */ |
| 1178 | |
| 1179 | void maintenance_print_statistics (char *, int); |
| 1180 | |
| 1181 | /* Symbol-reading stuff in symfile.c and solib.c. */ |
| 1182 | |
| 1183 | extern void clear_solib (void); |
| 1184 | |
| 1185 | /* source.c */ |
| 1186 | |
| 1187 | extern int identify_source_line (struct symtab *, int, int, CORE_ADDR); |
| 1188 | |
| 1189 | /* Flags passed as 4th argument to print_source_lines. */ |
| 1190 | |
| 1191 | enum print_source_lines_flags |
| 1192 | { |
| 1193 | /* Do not print an error message. */ |
| 1194 | PRINT_SOURCE_LINES_NOERROR = (1 << 0), |
| 1195 | |
| 1196 | /* Print the filename in front of the source lines. */ |
| 1197 | PRINT_SOURCE_LINES_FILENAME = (1 << 1) |
| 1198 | }; |
| 1199 | |
| 1200 | extern void print_source_lines (struct symtab *, int, int, |
| 1201 | enum print_source_lines_flags); |
| 1202 | |
| 1203 | extern void forget_cached_source_info_for_objfile (struct objfile *); |
| 1204 | extern void forget_cached_source_info (void); |
| 1205 | |
| 1206 | extern void select_source_symtab (struct symtab *); |
| 1207 | |
| 1208 | extern VEC (char_ptr) *default_make_symbol_completion_list_break_on |
| 1209 | (char *text, char *word, const char *break_on, |
| 1210 | enum type_code code); |
| 1211 | extern VEC (char_ptr) *default_make_symbol_completion_list (char *, char *, |
| 1212 | enum type_code); |
| 1213 | extern VEC (char_ptr) *make_symbol_completion_list (char *, char *); |
| 1214 | extern VEC (char_ptr) *make_symbol_completion_type (char *, char *, |
| 1215 | enum type_code); |
| 1216 | extern VEC (char_ptr) *make_symbol_completion_list_fn (struct cmd_list_element *, |
| 1217 | char *, char *); |
| 1218 | |
| 1219 | extern VEC (char_ptr) *make_file_symbol_completion_list (char *, |
| 1220 | char *, char *); |
| 1221 | |
| 1222 | extern VEC (char_ptr) *make_source_files_completion_list (char *, char *); |
| 1223 | |
| 1224 | /* symtab.c */ |
| 1225 | |
| 1226 | int matching_obj_sections (struct obj_section *, struct obj_section *); |
| 1227 | |
| 1228 | extern const char *find_main_filename (void); |
| 1229 | |
| 1230 | extern struct symtab *find_line_symtab (struct symtab *, int, int *, int *); |
| 1231 | |
| 1232 | extern struct symtab_and_line find_function_start_sal (struct symbol *sym, |
| 1233 | int); |
| 1234 | |
| 1235 | extern void skip_prologue_sal (struct symtab_and_line *); |
| 1236 | |
| 1237 | /* symfile.c */ |
| 1238 | |
| 1239 | extern void clear_symtab_users (int add_flags); |
| 1240 | |
| 1241 | extern enum language deduce_language_from_filename (const char *); |
| 1242 | |
| 1243 | /* symtab.c */ |
| 1244 | |
| 1245 | extern int in_prologue (struct gdbarch *gdbarch, |
| 1246 | CORE_ADDR pc, CORE_ADDR func_start); |
| 1247 | |
| 1248 | extern CORE_ADDR skip_prologue_using_sal (struct gdbarch *gdbarch, |
| 1249 | CORE_ADDR func_addr); |
| 1250 | |
| 1251 | extern struct symbol *fixup_symbol_section (struct symbol *, |
| 1252 | struct objfile *); |
| 1253 | |
| 1254 | /* Symbol searching */ |
| 1255 | |
| 1256 | /* When using search_symbols, a list of the following structs is returned. |
| 1257 | Callers must free the search list using free_search_symbols! */ |
| 1258 | struct symbol_search |
| 1259 | { |
| 1260 | /* The block in which the match was found. Could be, for example, |
| 1261 | STATIC_BLOCK or GLOBAL_BLOCK. */ |
| 1262 | int block; |
| 1263 | |
| 1264 | /* Information describing what was found. |
| 1265 | |
| 1266 | If symtab abd symbol are NOT NULL, then information was found |
| 1267 | for this match. */ |
| 1268 | struct symtab *symtab; |
| 1269 | struct symbol *symbol; |
| 1270 | |
| 1271 | /* If msymbol is non-null, then a match was made on something for |
| 1272 | which only minimal_symbols exist. */ |
| 1273 | struct minimal_symbol *msymbol; |
| 1274 | |
| 1275 | /* A link to the next match, or NULL for the end. */ |
| 1276 | struct symbol_search *next; |
| 1277 | }; |
| 1278 | |
| 1279 | extern void search_symbols (char *, enum search_domain, int, char **, |
| 1280 | struct symbol_search **); |
| 1281 | extern void free_search_symbols (struct symbol_search *); |
| 1282 | extern struct cleanup *make_cleanup_free_search_symbols (struct symbol_search |
| 1283 | *); |
| 1284 | |
| 1285 | /* The name of the ``main'' function. |
| 1286 | FIXME: cagney/2001-03-20: Can't make main_name() const since some |
| 1287 | of the calling code currently assumes that the string isn't |
| 1288 | const. */ |
| 1289 | extern void set_main_name (const char *name); |
| 1290 | extern /*const */ char *main_name (void); |
| 1291 | extern enum language language_of_main; |
| 1292 | |
| 1293 | /* Check global symbols in objfile. */ |
| 1294 | struct symbol *lookup_global_symbol_from_objfile (const struct objfile *, |
| 1295 | const char *name, |
| 1296 | const domain_enum domain); |
| 1297 | |
| 1298 | /* Return 1 if the supplied producer string matches the ARM RealView |
| 1299 | compiler (armcc). */ |
| 1300 | int producer_is_realview (const char *producer); |
| 1301 | |
| 1302 | void fixup_section (struct general_symbol_info *ginfo, |
| 1303 | CORE_ADDR addr, struct objfile *objfile); |
| 1304 | |
| 1305 | struct objfile *lookup_objfile_from_block (const struct block *block); |
| 1306 | |
| 1307 | extern int symtab_create_debug; |
| 1308 | |
| 1309 | extern int basenames_may_differ; |
| 1310 | |
| 1311 | int compare_filenames_for_search (const char *filename, |
| 1312 | const char *search_name); |
| 1313 | |
| 1314 | int iterate_over_some_symtabs (const char *name, |
| 1315 | const char *full_path, |
| 1316 | const char *real_path, |
| 1317 | int (*callback) (struct symtab *symtab, |
| 1318 | void *data), |
| 1319 | void *data, |
| 1320 | struct symtab *first, |
| 1321 | struct symtab *after_last); |
| 1322 | |
| 1323 | void iterate_over_symtabs (const char *name, |
| 1324 | int (*callback) (struct symtab *symtab, |
| 1325 | void *data), |
| 1326 | void *data); |
| 1327 | |
| 1328 | DEF_VEC_I (CORE_ADDR); |
| 1329 | |
| 1330 | VEC (CORE_ADDR) *find_pcs_for_symtab_line (struct symtab *symtab, int line, |
| 1331 | struct linetable_entry **best_entry); |
| 1332 | |
| 1333 | /* Callback for LA_ITERATE_OVER_SYMBOLS. The callback will be called |
| 1334 | once per matching symbol SYM, with DATA being the argument of the |
| 1335 | same name that was passed to LA_ITERATE_OVER_SYMBOLS. The callback |
| 1336 | should return nonzero to indicate that LA_ITERATE_OVER_SYMBOLS |
| 1337 | should continue iterating, or zero to indicate that the iteration |
| 1338 | should end. */ |
| 1339 | |
| 1340 | typedef int (symbol_found_callback_ftype) (struct symbol *sym, void *data); |
| 1341 | |
| 1342 | void iterate_over_symbols (const struct block *block, const char *name, |
| 1343 | const domain_enum domain, |
| 1344 | symbol_found_callback_ftype *callback, |
| 1345 | void *data); |
| 1346 | |
| 1347 | struct cleanup *demangle_for_lookup (const char *name, enum language lang, |
| 1348 | const char **result_name); |
| 1349 | |
| 1350 | #endif /* !defined(SYMTAB_H) */ |