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