| 1 | /* Debug logging for the symbol file functions for the GNU debugger, GDB. |
| 2 | |
| 3 | Copyright (C) 2013-2019 Free Software Foundation, Inc. |
| 4 | |
| 5 | Contributed by Cygnus Support, using pieces from other GDB modules. |
| 6 | |
| 7 | This file is part of GDB. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 3 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 21 | |
| 22 | /* Note: Be careful with functions that can throw errors. |
| 23 | We want to see a logging message regardless of whether an error was thrown. |
| 24 | This typically means printing a message before calling the real function |
| 25 | and then if the function returns a result printing a message after it |
| 26 | returns. */ |
| 27 | |
| 28 | #include "defs.h" |
| 29 | #include "gdbcmd.h" |
| 30 | #include "objfiles.h" |
| 31 | #include "observable.h" |
| 32 | #include "source.h" |
| 33 | #include "symtab.h" |
| 34 | #include "symfile.h" |
| 35 | |
| 36 | /* We need to save a pointer to the real symbol functions. |
| 37 | Plus, the debug versions are malloc'd because we have to NULL out the |
| 38 | ones that are NULL in the real copy. */ |
| 39 | |
| 40 | struct debug_sym_fns_data |
| 41 | { |
| 42 | const struct sym_fns *real_sf; |
| 43 | struct sym_fns debug_sf; |
| 44 | }; |
| 45 | |
| 46 | /* We need to record a pointer to the real set of functions for each |
| 47 | objfile. */ |
| 48 | static const struct objfile_data *symfile_debug_objfile_data_key; |
| 49 | |
| 50 | /* If non-zero all calls to the symfile functions are logged. */ |
| 51 | static int debug_symfile = 0; |
| 52 | |
| 53 | /* Return non-zero if symfile debug logging is installed. */ |
| 54 | |
| 55 | static int |
| 56 | symfile_debug_installed (struct objfile *objfile) |
| 57 | { |
| 58 | return (objfile->sf != NULL |
| 59 | && objfile_data (objfile, symfile_debug_objfile_data_key) != NULL); |
| 60 | } |
| 61 | |
| 62 | /* Utility return the name to print for SYMTAB. */ |
| 63 | |
| 64 | static const char * |
| 65 | debug_symtab_name (struct symtab *symtab) |
| 66 | { |
| 67 | return symtab_to_filename_for_display (symtab); |
| 68 | } |
| 69 | \f |
| 70 | /* Debugging version of struct quick_symbol_functions. */ |
| 71 | |
| 72 | static int |
| 73 | debug_qf_has_symbols (struct objfile *objfile) |
| 74 | { |
| 75 | const struct debug_sym_fns_data *debug_data |
| 76 | = ((const struct debug_sym_fns_data *) |
| 77 | objfile_data (objfile, symfile_debug_objfile_data_key)); |
| 78 | int retval; |
| 79 | |
| 80 | retval = debug_data->real_sf->qf->has_symbols (objfile); |
| 81 | |
| 82 | fprintf_filtered (gdb_stdlog, "qf->has_symbols (%s) = %d\n", |
| 83 | objfile_debug_name (objfile), retval); |
| 84 | |
| 85 | return retval; |
| 86 | } |
| 87 | |
| 88 | static struct symtab * |
| 89 | debug_qf_find_last_source_symtab (struct objfile *objfile) |
| 90 | { |
| 91 | const struct debug_sym_fns_data *debug_data |
| 92 | = ((const struct debug_sym_fns_data *) |
| 93 | objfile_data (objfile, symfile_debug_objfile_data_key)); |
| 94 | struct symtab *retval; |
| 95 | |
| 96 | fprintf_filtered (gdb_stdlog, "qf->find_last_source_symtab (%s)\n", |
| 97 | objfile_debug_name (objfile)); |
| 98 | |
| 99 | retval = debug_data->real_sf->qf->find_last_source_symtab (objfile); |
| 100 | |
| 101 | fprintf_filtered (gdb_stdlog, "qf->find_last_source_symtab (...) = %s\n", |
| 102 | retval ? debug_symtab_name (retval) : "NULL"); |
| 103 | |
| 104 | return retval; |
| 105 | } |
| 106 | |
| 107 | static void |
| 108 | debug_qf_forget_cached_source_info (struct objfile *objfile) |
| 109 | { |
| 110 | const struct debug_sym_fns_data *debug_data |
| 111 | = ((const struct debug_sym_fns_data *) |
| 112 | objfile_data (objfile, symfile_debug_objfile_data_key)); |
| 113 | |
| 114 | fprintf_filtered (gdb_stdlog, "qf->forget_cached_source_info (%s)\n", |
| 115 | objfile_debug_name (objfile)); |
| 116 | |
| 117 | debug_data->real_sf->qf->forget_cached_source_info (objfile); |
| 118 | } |
| 119 | |
| 120 | static bool |
| 121 | debug_qf_map_symtabs_matching_filename |
| 122 | (struct objfile *objfile, const char *name, const char *real_path, |
| 123 | gdb::function_view<bool (symtab *)> callback) |
| 124 | { |
| 125 | const struct debug_sym_fns_data *debug_data |
| 126 | = ((const struct debug_sym_fns_data *) |
| 127 | objfile_data (objfile, symfile_debug_objfile_data_key)); |
| 128 | |
| 129 | fprintf_filtered (gdb_stdlog, |
| 130 | "qf->map_symtabs_matching_filename (%s, \"%s\", \"%s\", %s)\n", |
| 131 | objfile_debug_name (objfile), name, |
| 132 | real_path ? real_path : NULL, |
| 133 | host_address_to_string (&callback)); |
| 134 | |
| 135 | bool retval = (debug_data->real_sf->qf->map_symtabs_matching_filename |
| 136 | (objfile, name, real_path, callback)); |
| 137 | |
| 138 | fprintf_filtered (gdb_stdlog, |
| 139 | "qf->map_symtabs_matching_filename (...) = %d\n", |
| 140 | retval); |
| 141 | |
| 142 | return retval; |
| 143 | } |
| 144 | |
| 145 | static struct compunit_symtab * |
| 146 | debug_qf_lookup_symbol (struct objfile *objfile, int kind, const char *name, |
| 147 | domain_enum domain) |
| 148 | { |
| 149 | const struct debug_sym_fns_data *debug_data |
| 150 | = ((const struct debug_sym_fns_data *) |
| 151 | objfile_data (objfile, symfile_debug_objfile_data_key)); |
| 152 | struct compunit_symtab *retval; |
| 153 | |
| 154 | fprintf_filtered (gdb_stdlog, |
| 155 | "qf->lookup_symbol (%s, %d, \"%s\", %s)\n", |
| 156 | objfile_debug_name (objfile), kind, name, |
| 157 | domain_name (domain)); |
| 158 | |
| 159 | retval = debug_data->real_sf->qf->lookup_symbol (objfile, kind, name, |
| 160 | domain); |
| 161 | |
| 162 | fprintf_filtered (gdb_stdlog, "qf->lookup_symbol (...) = %s\n", |
| 163 | retval |
| 164 | ? debug_symtab_name (compunit_primary_filetab (retval)) |
| 165 | : "NULL"); |
| 166 | |
| 167 | return retval; |
| 168 | } |
| 169 | |
| 170 | static void |
| 171 | debug_qf_print_stats (struct objfile *objfile) |
| 172 | { |
| 173 | const struct debug_sym_fns_data *debug_data |
| 174 | = ((const struct debug_sym_fns_data *) |
| 175 | objfile_data (objfile, symfile_debug_objfile_data_key)); |
| 176 | |
| 177 | fprintf_filtered (gdb_stdlog, "qf->print_stats (%s)\n", |
| 178 | objfile_debug_name (objfile)); |
| 179 | |
| 180 | debug_data->real_sf->qf->print_stats (objfile); |
| 181 | } |
| 182 | |
| 183 | static void |
| 184 | debug_qf_dump (struct objfile *objfile) |
| 185 | { |
| 186 | const struct debug_sym_fns_data *debug_data |
| 187 | = ((const struct debug_sym_fns_data *) |
| 188 | objfile_data (objfile, symfile_debug_objfile_data_key)); |
| 189 | |
| 190 | fprintf_filtered (gdb_stdlog, "qf->dump (%s)\n", |
| 191 | objfile_debug_name (objfile)); |
| 192 | |
| 193 | debug_data->real_sf->qf->dump (objfile); |
| 194 | } |
| 195 | |
| 196 | static void |
| 197 | debug_qf_expand_symtabs_for_function (struct objfile *objfile, |
| 198 | const char *func_name) |
| 199 | { |
| 200 | const struct debug_sym_fns_data *debug_data |
| 201 | = ((const struct debug_sym_fns_data *) |
| 202 | objfile_data (objfile, symfile_debug_objfile_data_key)); |
| 203 | |
| 204 | fprintf_filtered (gdb_stdlog, |
| 205 | "qf->expand_symtabs_for_function (%s, \"%s\")\n", |
| 206 | objfile_debug_name (objfile), func_name); |
| 207 | |
| 208 | debug_data->real_sf->qf->expand_symtabs_for_function (objfile, func_name); |
| 209 | } |
| 210 | |
| 211 | static void |
| 212 | debug_qf_expand_all_symtabs (struct objfile *objfile) |
| 213 | { |
| 214 | const struct debug_sym_fns_data *debug_data |
| 215 | = ((const struct debug_sym_fns_data *) |
| 216 | objfile_data (objfile, symfile_debug_objfile_data_key)); |
| 217 | |
| 218 | fprintf_filtered (gdb_stdlog, "qf->expand_all_symtabs (%s)\n", |
| 219 | objfile_debug_name (objfile)); |
| 220 | |
| 221 | debug_data->real_sf->qf->expand_all_symtabs (objfile); |
| 222 | } |
| 223 | |
| 224 | static void |
| 225 | debug_qf_expand_symtabs_with_fullname (struct objfile *objfile, |
| 226 | const char *fullname) |
| 227 | { |
| 228 | const struct debug_sym_fns_data *debug_data |
| 229 | = ((const struct debug_sym_fns_data *) |
| 230 | objfile_data (objfile, symfile_debug_objfile_data_key)); |
| 231 | |
| 232 | fprintf_filtered (gdb_stdlog, |
| 233 | "qf->expand_symtabs_with_fullname (%s, \"%s\")\n", |
| 234 | objfile_debug_name (objfile), fullname); |
| 235 | |
| 236 | debug_data->real_sf->qf->expand_symtabs_with_fullname (objfile, fullname); |
| 237 | } |
| 238 | |
| 239 | static void |
| 240 | debug_qf_map_matching_symbols (struct objfile *objfile, |
| 241 | const char *name, domain_enum domain, |
| 242 | int global, |
| 243 | int (*callback) (struct block *, |
| 244 | struct symbol *, void *), |
| 245 | void *data, |
| 246 | symbol_name_match_type match, |
| 247 | symbol_compare_ftype *ordered_compare) |
| 248 | { |
| 249 | const struct debug_sym_fns_data *debug_data |
| 250 | = ((const struct debug_sym_fns_data *) |
| 251 | objfile_data (objfile, symfile_debug_objfile_data_key)); |
| 252 | |
| 253 | fprintf_filtered (gdb_stdlog, |
| 254 | "qf->map_matching_symbols (%s, \"%s\", %s, %d, %s, %s, %s, %s)\n", |
| 255 | objfile_debug_name (objfile), name, |
| 256 | domain_name (domain), global, |
| 257 | host_address_to_string (callback), |
| 258 | host_address_to_string (data), |
| 259 | plongest ((LONGEST) match), |
| 260 | host_address_to_string (ordered_compare)); |
| 261 | |
| 262 | debug_data->real_sf->qf->map_matching_symbols (objfile, name, |
| 263 | domain, global, |
| 264 | callback, data, |
| 265 | match, |
| 266 | ordered_compare); |
| 267 | } |
| 268 | |
| 269 | static void |
| 270 | debug_qf_expand_symtabs_matching |
| 271 | (struct objfile *objfile, |
| 272 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, |
| 273 | const lookup_name_info &lookup_name, |
| 274 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, |
| 275 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, |
| 276 | enum search_domain kind) |
| 277 | { |
| 278 | const struct debug_sym_fns_data *debug_data |
| 279 | = ((const struct debug_sym_fns_data *) |
| 280 | objfile_data (objfile, symfile_debug_objfile_data_key)); |
| 281 | |
| 282 | fprintf_filtered (gdb_stdlog, |
| 283 | "qf->expand_symtabs_matching (%s, %s, %s, %s, %s)\n", |
| 284 | objfile_debug_name (objfile), |
| 285 | host_address_to_string (&file_matcher), |
| 286 | host_address_to_string (&symbol_matcher), |
| 287 | host_address_to_string (&expansion_notify), |
| 288 | search_domain_name (kind)); |
| 289 | |
| 290 | debug_data->real_sf->qf->expand_symtabs_matching (objfile, |
| 291 | file_matcher, |
| 292 | lookup_name, |
| 293 | symbol_matcher, |
| 294 | expansion_notify, |
| 295 | kind); |
| 296 | } |
| 297 | |
| 298 | static struct compunit_symtab * |
| 299 | debug_qf_find_pc_sect_compunit_symtab (struct objfile *objfile, |
| 300 | struct bound_minimal_symbol msymbol, |
| 301 | CORE_ADDR pc, |
| 302 | struct obj_section *section, |
| 303 | int warn_if_readin) |
| 304 | { |
| 305 | const struct debug_sym_fns_data *debug_data |
| 306 | = ((const struct debug_sym_fns_data *) |
| 307 | objfile_data (objfile, symfile_debug_objfile_data_key)); |
| 308 | struct compunit_symtab *retval; |
| 309 | |
| 310 | fprintf_filtered (gdb_stdlog, |
| 311 | "qf->find_pc_sect_compunit_symtab (%s, %s, %s, %s, %d)\n", |
| 312 | objfile_debug_name (objfile), |
| 313 | host_address_to_string (msymbol.minsym), |
| 314 | hex_string (pc), |
| 315 | host_address_to_string (section), |
| 316 | warn_if_readin); |
| 317 | |
| 318 | retval |
| 319 | = debug_data->real_sf->qf->find_pc_sect_compunit_symtab (objfile, msymbol, |
| 320 | pc, section, |
| 321 | warn_if_readin); |
| 322 | |
| 323 | fprintf_filtered (gdb_stdlog, |
| 324 | "qf->find_pc_sect_compunit_symtab (...) = %s\n", |
| 325 | retval |
| 326 | ? debug_symtab_name (compunit_primary_filetab (retval)) |
| 327 | : "NULL"); |
| 328 | |
| 329 | return retval; |
| 330 | } |
| 331 | |
| 332 | static void |
| 333 | debug_qf_map_symbol_filenames (struct objfile *objfile, |
| 334 | symbol_filename_ftype *fun, void *data, |
| 335 | int need_fullname) |
| 336 | { |
| 337 | const struct debug_sym_fns_data *debug_data |
| 338 | = ((const struct debug_sym_fns_data *) |
| 339 | objfile_data (objfile, symfile_debug_objfile_data_key)); |
| 340 | fprintf_filtered (gdb_stdlog, |
| 341 | "qf->map_symbol_filenames (%s, %s, %s, %d)\n", |
| 342 | objfile_debug_name (objfile), |
| 343 | host_address_to_string (fun), |
| 344 | host_address_to_string (data), |
| 345 | need_fullname); |
| 346 | |
| 347 | debug_data->real_sf->qf->map_symbol_filenames (objfile, fun, data, |
| 348 | need_fullname); |
| 349 | } |
| 350 | |
| 351 | static struct compunit_symtab * |
| 352 | debug_qf_find_compunit_symtab_by_address (struct objfile *objfile, |
| 353 | CORE_ADDR address) |
| 354 | { |
| 355 | const struct debug_sym_fns_data *debug_data |
| 356 | = ((const struct debug_sym_fns_data *) |
| 357 | objfile_data (objfile, symfile_debug_objfile_data_key)); |
| 358 | fprintf_filtered (gdb_stdlog, |
| 359 | "qf->find_compunit_symtab_by_address (%s, %s)\n", |
| 360 | objfile_debug_name (objfile), |
| 361 | hex_string (address)); |
| 362 | |
| 363 | struct compunit_symtab *result = NULL; |
| 364 | if (debug_data->real_sf->qf->map_symbol_filenames != NULL) |
| 365 | result |
| 366 | = debug_data->real_sf->qf->find_compunit_symtab_by_address (objfile, |
| 367 | address); |
| 368 | |
| 369 | fprintf_filtered (gdb_stdlog, |
| 370 | "qf->find_compunit_symtab_by_address (...) = %s\n", |
| 371 | result |
| 372 | ? debug_symtab_name (compunit_primary_filetab (result)) |
| 373 | : "NULL"); |
| 374 | |
| 375 | return result; |
| 376 | } |
| 377 | |
| 378 | static const struct quick_symbol_functions debug_sym_quick_functions = |
| 379 | { |
| 380 | debug_qf_has_symbols, |
| 381 | debug_qf_find_last_source_symtab, |
| 382 | debug_qf_forget_cached_source_info, |
| 383 | debug_qf_map_symtabs_matching_filename, |
| 384 | debug_qf_lookup_symbol, |
| 385 | debug_qf_print_stats, |
| 386 | debug_qf_dump, |
| 387 | debug_qf_expand_symtabs_for_function, |
| 388 | debug_qf_expand_all_symtabs, |
| 389 | debug_qf_expand_symtabs_with_fullname, |
| 390 | debug_qf_map_matching_symbols, |
| 391 | debug_qf_expand_symtabs_matching, |
| 392 | debug_qf_find_pc_sect_compunit_symtab, |
| 393 | debug_qf_find_compunit_symtab_by_address, |
| 394 | debug_qf_map_symbol_filenames |
| 395 | }; |
| 396 | \f |
| 397 | /* Debugging version of struct sym_probe_fns. */ |
| 398 | |
| 399 | static const std::vector<probe *> & |
| 400 | debug_sym_get_probes (struct objfile *objfile) |
| 401 | { |
| 402 | const struct debug_sym_fns_data *debug_data |
| 403 | = ((const struct debug_sym_fns_data *) |
| 404 | objfile_data (objfile, symfile_debug_objfile_data_key)); |
| 405 | |
| 406 | const std::vector<probe *> &retval |
| 407 | = debug_data->real_sf->sym_probe_fns->sym_get_probes (objfile); |
| 408 | |
| 409 | fprintf_filtered (gdb_stdlog, |
| 410 | "probes->sym_get_probes (%s) = %s\n", |
| 411 | objfile_debug_name (objfile), |
| 412 | host_address_to_string (retval.data ())); |
| 413 | |
| 414 | return retval; |
| 415 | } |
| 416 | |
| 417 | static const struct sym_probe_fns debug_sym_probe_fns = |
| 418 | { |
| 419 | debug_sym_get_probes, |
| 420 | }; |
| 421 | \f |
| 422 | /* Debugging version of struct sym_fns. */ |
| 423 | |
| 424 | static void |
| 425 | debug_sym_new_init (struct objfile *objfile) |
| 426 | { |
| 427 | const struct debug_sym_fns_data *debug_data |
| 428 | = ((const struct debug_sym_fns_data *) |
| 429 | objfile_data (objfile, symfile_debug_objfile_data_key)); |
| 430 | |
| 431 | fprintf_filtered (gdb_stdlog, "sf->sym_new_init (%s)\n", |
| 432 | objfile_debug_name (objfile)); |
| 433 | |
| 434 | debug_data->real_sf->sym_new_init (objfile); |
| 435 | } |
| 436 | |
| 437 | static void |
| 438 | debug_sym_init (struct objfile *objfile) |
| 439 | { |
| 440 | const struct debug_sym_fns_data *debug_data |
| 441 | = ((const struct debug_sym_fns_data *) |
| 442 | objfile_data (objfile, symfile_debug_objfile_data_key)); |
| 443 | |
| 444 | fprintf_filtered (gdb_stdlog, "sf->sym_init (%s)\n", |
| 445 | objfile_debug_name (objfile)); |
| 446 | |
| 447 | debug_data->real_sf->sym_init (objfile); |
| 448 | } |
| 449 | |
| 450 | static void |
| 451 | debug_sym_read (struct objfile *objfile, symfile_add_flags symfile_flags) |
| 452 | { |
| 453 | const struct debug_sym_fns_data *debug_data |
| 454 | = ((const struct debug_sym_fns_data *) |
| 455 | objfile_data (objfile, symfile_debug_objfile_data_key)); |
| 456 | |
| 457 | fprintf_filtered (gdb_stdlog, "sf->sym_read (%s, 0x%x)\n", |
| 458 | objfile_debug_name (objfile), (unsigned) symfile_flags); |
| 459 | |
| 460 | debug_data->real_sf->sym_read (objfile, symfile_flags); |
| 461 | } |
| 462 | |
| 463 | static void |
| 464 | debug_sym_read_psymbols (struct objfile *objfile) |
| 465 | { |
| 466 | const struct debug_sym_fns_data *debug_data |
| 467 | = ((const struct debug_sym_fns_data *) |
| 468 | objfile_data (objfile, symfile_debug_objfile_data_key)); |
| 469 | |
| 470 | fprintf_filtered (gdb_stdlog, "sf->sym_read_psymbols (%s)\n", |
| 471 | objfile_debug_name (objfile)); |
| 472 | |
| 473 | debug_data->real_sf->sym_read_psymbols (objfile); |
| 474 | } |
| 475 | |
| 476 | static void |
| 477 | debug_sym_finish (struct objfile *objfile) |
| 478 | { |
| 479 | const struct debug_sym_fns_data *debug_data |
| 480 | = ((const struct debug_sym_fns_data *) |
| 481 | objfile_data (objfile, symfile_debug_objfile_data_key)); |
| 482 | |
| 483 | fprintf_filtered (gdb_stdlog, "sf->sym_finish (%s)\n", |
| 484 | objfile_debug_name (objfile)); |
| 485 | |
| 486 | debug_data->real_sf->sym_finish (objfile); |
| 487 | } |
| 488 | |
| 489 | static void |
| 490 | debug_sym_offsets (struct objfile *objfile, |
| 491 | const section_addr_info &info) |
| 492 | { |
| 493 | const struct debug_sym_fns_data *debug_data |
| 494 | = ((const struct debug_sym_fns_data *) |
| 495 | objfile_data (objfile, symfile_debug_objfile_data_key)); |
| 496 | |
| 497 | fprintf_filtered (gdb_stdlog, "sf->sym_offsets (%s, %s)\n", |
| 498 | objfile_debug_name (objfile), |
| 499 | host_address_to_string (&info)); |
| 500 | |
| 501 | debug_data->real_sf->sym_offsets (objfile, info); |
| 502 | } |
| 503 | |
| 504 | static struct symfile_segment_data * |
| 505 | debug_sym_segments (bfd *abfd) |
| 506 | { |
| 507 | /* This API function is annoying, it doesn't take a "this" pointer. |
| 508 | Fortunately it is only used in one place where we (re-)lookup the |
| 509 | sym_fns table to use. Thus we will never be called. */ |
| 510 | gdb_assert_not_reached ("debug_sym_segments called"); |
| 511 | } |
| 512 | |
| 513 | static void |
| 514 | debug_sym_read_linetable (struct objfile *objfile) |
| 515 | { |
| 516 | const struct debug_sym_fns_data *debug_data |
| 517 | = ((const struct debug_sym_fns_data *) |
| 518 | objfile_data (objfile, symfile_debug_objfile_data_key)); |
| 519 | |
| 520 | fprintf_filtered (gdb_stdlog, "sf->sym_read_linetable (%s)\n", |
| 521 | objfile_debug_name (objfile)); |
| 522 | |
| 523 | debug_data->real_sf->sym_read_linetable (objfile); |
| 524 | } |
| 525 | |
| 526 | static bfd_byte * |
| 527 | debug_sym_relocate (struct objfile *objfile, asection *sectp, bfd_byte *buf) |
| 528 | { |
| 529 | const struct debug_sym_fns_data *debug_data |
| 530 | = ((const struct debug_sym_fns_data *) |
| 531 | objfile_data (objfile, symfile_debug_objfile_data_key)); |
| 532 | bfd_byte *retval; |
| 533 | |
| 534 | retval = debug_data->real_sf->sym_relocate (objfile, sectp, buf); |
| 535 | |
| 536 | fprintf_filtered (gdb_stdlog, |
| 537 | "sf->sym_relocate (%s, %s, %s) = %s\n", |
| 538 | objfile_debug_name (objfile), |
| 539 | host_address_to_string (sectp), |
| 540 | host_address_to_string (buf), |
| 541 | host_address_to_string (retval)); |
| 542 | |
| 543 | return retval; |
| 544 | } |
| 545 | |
| 546 | /* Template of debugging version of struct sym_fns. |
| 547 | A copy is made, with sym_flavour updated, and a pointer to the real table |
| 548 | installed in real_sf, and then a pointer to the copy is installed in the |
| 549 | objfile. */ |
| 550 | |
| 551 | static const struct sym_fns debug_sym_fns = |
| 552 | { |
| 553 | debug_sym_new_init, |
| 554 | debug_sym_init, |
| 555 | debug_sym_read, |
| 556 | debug_sym_read_psymbols, |
| 557 | debug_sym_finish, |
| 558 | debug_sym_offsets, |
| 559 | debug_sym_segments, |
| 560 | debug_sym_read_linetable, |
| 561 | debug_sym_relocate, |
| 562 | &debug_sym_probe_fns, |
| 563 | &debug_sym_quick_functions |
| 564 | }; |
| 565 | \f |
| 566 | /* Free the copy of sym_fns recorded in the registry. */ |
| 567 | |
| 568 | static void |
| 569 | symfile_debug_free_objfile (struct objfile *objfile, void *datum) |
| 570 | { |
| 571 | xfree (datum); |
| 572 | } |
| 573 | |
| 574 | /* Install the debugging versions of the symfile functions for OBJFILE. |
| 575 | Do not call this if the debug versions are already installed. */ |
| 576 | |
| 577 | static void |
| 578 | install_symfile_debug_logging (struct objfile *objfile) |
| 579 | { |
| 580 | const struct sym_fns *real_sf; |
| 581 | struct debug_sym_fns_data *debug_data; |
| 582 | |
| 583 | /* The debug versions should not already be installed. */ |
| 584 | gdb_assert (!symfile_debug_installed (objfile)); |
| 585 | |
| 586 | real_sf = objfile->sf; |
| 587 | |
| 588 | /* Alas we have to preserve NULL entries in REAL_SF. */ |
| 589 | debug_data = XCNEW (struct debug_sym_fns_data); |
| 590 | |
| 591 | #define COPY_SF_PTR(from, to, name, func) \ |
| 592 | do { \ |
| 593 | if ((from)->name) \ |
| 594 | (to)->debug_sf.name = func; \ |
| 595 | } while (0) |
| 596 | |
| 597 | COPY_SF_PTR (real_sf, debug_data, sym_new_init, debug_sym_new_init); |
| 598 | COPY_SF_PTR (real_sf, debug_data, sym_init, debug_sym_init); |
| 599 | COPY_SF_PTR (real_sf, debug_data, sym_read, debug_sym_read); |
| 600 | COPY_SF_PTR (real_sf, debug_data, sym_read_psymbols, |
| 601 | debug_sym_read_psymbols); |
| 602 | COPY_SF_PTR (real_sf, debug_data, sym_finish, debug_sym_finish); |
| 603 | COPY_SF_PTR (real_sf, debug_data, sym_offsets, debug_sym_offsets); |
| 604 | COPY_SF_PTR (real_sf, debug_data, sym_segments, debug_sym_segments); |
| 605 | COPY_SF_PTR (real_sf, debug_data, sym_read_linetable, |
| 606 | debug_sym_read_linetable); |
| 607 | COPY_SF_PTR (real_sf, debug_data, sym_relocate, debug_sym_relocate); |
| 608 | if (real_sf->sym_probe_fns) |
| 609 | debug_data->debug_sf.sym_probe_fns = &debug_sym_probe_fns; |
| 610 | debug_data->debug_sf.qf = &debug_sym_quick_functions; |
| 611 | |
| 612 | #undef COPY_SF_PTR |
| 613 | |
| 614 | debug_data->real_sf = real_sf; |
| 615 | set_objfile_data (objfile, symfile_debug_objfile_data_key, debug_data); |
| 616 | objfile->sf = &debug_data->debug_sf; |
| 617 | } |
| 618 | |
| 619 | /* Uninstall the debugging versions of the symfile functions for OBJFILE. |
| 620 | Do not call this if the debug versions are not installed. */ |
| 621 | |
| 622 | static void |
| 623 | uninstall_symfile_debug_logging (struct objfile *objfile) |
| 624 | { |
| 625 | struct debug_sym_fns_data *debug_data; |
| 626 | |
| 627 | /* The debug versions should be currently installed. */ |
| 628 | gdb_assert (symfile_debug_installed (objfile)); |
| 629 | |
| 630 | debug_data = ((struct debug_sym_fns_data *) |
| 631 | objfile_data (objfile, symfile_debug_objfile_data_key)); |
| 632 | |
| 633 | objfile->sf = debug_data->real_sf; |
| 634 | xfree (debug_data); |
| 635 | set_objfile_data (objfile, symfile_debug_objfile_data_key, NULL); |
| 636 | } |
| 637 | |
| 638 | /* Call this function to set OBJFILE->SF. |
| 639 | Do not set OBJFILE->SF directly. */ |
| 640 | |
| 641 | void |
| 642 | objfile_set_sym_fns (struct objfile *objfile, const struct sym_fns *sf) |
| 643 | { |
| 644 | if (symfile_debug_installed (objfile)) |
| 645 | { |
| 646 | gdb_assert (debug_symfile); |
| 647 | /* Remove the current one, and reinstall a new one later. */ |
| 648 | uninstall_symfile_debug_logging (objfile); |
| 649 | } |
| 650 | |
| 651 | /* Assume debug logging is disabled. */ |
| 652 | objfile->sf = sf; |
| 653 | |
| 654 | /* Turn debug logging on if enabled. */ |
| 655 | if (debug_symfile) |
| 656 | install_symfile_debug_logging (objfile); |
| 657 | } |
| 658 | |
| 659 | static void |
| 660 | set_debug_symfile (const char *args, int from_tty, struct cmd_list_element *c) |
| 661 | { |
| 662 | struct program_space *pspace; |
| 663 | |
| 664 | ALL_PSPACES (pspace) |
| 665 | for (objfile *objfile : all_objfiles (pspace)) |
| 666 | { |
| 667 | if (debug_symfile) |
| 668 | { |
| 669 | if (!symfile_debug_installed (objfile)) |
| 670 | install_symfile_debug_logging (objfile); |
| 671 | } |
| 672 | else |
| 673 | { |
| 674 | if (symfile_debug_installed (objfile)) |
| 675 | uninstall_symfile_debug_logging (objfile); |
| 676 | } |
| 677 | } |
| 678 | } |
| 679 | |
| 680 | static void |
| 681 | show_debug_symfile (struct ui_file *file, int from_tty, |
| 682 | struct cmd_list_element *c, const char *value) |
| 683 | { |
| 684 | fprintf_filtered (file, _("Symfile debugging is %s.\n"), value); |
| 685 | } |
| 686 | |
| 687 | void |
| 688 | _initialize_symfile_debug (void) |
| 689 | { |
| 690 | symfile_debug_objfile_data_key |
| 691 | = register_objfile_data_with_cleanup (NULL, symfile_debug_free_objfile); |
| 692 | |
| 693 | add_setshow_boolean_cmd ("symfile", no_class, &debug_symfile, _("\ |
| 694 | Set debugging of the symfile functions."), _("\ |
| 695 | Show debugging of the symfile functions."), _("\ |
| 696 | When enabled, all calls to the symfile functions are logged."), |
| 697 | set_debug_symfile, show_debug_symfile, |
| 698 | &setdebuglist, &showdebuglist); |
| 699 | |
| 700 | /* Note: We don't need a new-objfile observer because debug logging |
| 701 | will be installed when objfile init'n calls objfile_set_sym_fns. */ |
| 702 | } |