gdb/symfile-debug.c

   1 /* Debug logging for the symbol file functions for the GNU debugger, GDB.
   2
   3    Copyright (C) 2013-2017 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 "observer.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_relocate (struct objfile *objfile,
 198                    const struct section_offsets *new_offsets,
 199                    const struct section_offsets *delta)
 200 {
 201   const struct debug_sym_fns_data *debug_data
 202     = ((const struct debug_sym_fns_data *)
 203        objfile_data (objfile, symfile_debug_objfile_data_key));
 204
 205   fprintf_filtered (gdb_stdlog, "qf->relocate (%s, %s, %s)\n",
 206                     objfile_debug_name (objfile),
 207                     host_address_to_string (new_offsets),
 208                     host_address_to_string (delta));
 209
 210   debug_data->real_sf->qf->relocate (objfile, new_offsets, delta);
 211 }
 212
 213 static void
 214 debug_qf_expand_symtabs_for_function (struct objfile *objfile,
 215                                       const char *func_name)
 216 {
 217   const struct debug_sym_fns_data *debug_data
 218     = ((const struct debug_sym_fns_data *)
 219        objfile_data (objfile, symfile_debug_objfile_data_key));
 220
 221   fprintf_filtered (gdb_stdlog,
 222                     "qf->expand_symtabs_for_function (%s, \"%s\")\n",
 223                     objfile_debug_name (objfile), func_name);
 224
 225   debug_data->real_sf->qf->expand_symtabs_for_function (objfile, func_name);
 226 }
 227
 228 static void
 229 debug_qf_expand_all_symtabs (struct objfile *objfile)
 230 {
 231   const struct debug_sym_fns_data *debug_data
 232     = ((const struct debug_sym_fns_data *)
 233        objfile_data (objfile, symfile_debug_objfile_data_key));
 234
 235   fprintf_filtered (gdb_stdlog, "qf->expand_all_symtabs (%s)\n",
 236                     objfile_debug_name (objfile));
 237
 238   debug_data->real_sf->qf->expand_all_symtabs (objfile);
 239 }
 240
 241 static void
 242 debug_qf_expand_symtabs_with_fullname (struct objfile *objfile,
 243                                        const char *fullname)
 244 {
 245   const struct debug_sym_fns_data *debug_data
 246     = ((const struct debug_sym_fns_data *)
 247        objfile_data (objfile, symfile_debug_objfile_data_key));
 248
 249   fprintf_filtered (gdb_stdlog,
 250                     "qf->expand_symtabs_with_fullname (%s, \"%s\")\n",
 251                     objfile_debug_name (objfile), fullname);
 252
 253   debug_data->real_sf->qf->expand_symtabs_with_fullname (objfile, fullname);
 254 }
 255
 256 static void
 257 debug_qf_map_matching_symbols (struct objfile *objfile,
 258                                const char *name, domain_enum domain,
 259                                int global,
 260                                int (*callback) (struct block *,
 261                                                 struct symbol *, void *),
 262                                void *data,
 263                                symbol_compare_ftype *match,
 264                                symbol_compare_ftype *ordered_compare)
 265 {
 266   const struct debug_sym_fns_data *debug_data
 267     = ((const struct debug_sym_fns_data *)
 268        objfile_data (objfile, symfile_debug_objfile_data_key));
 269
 270   fprintf_filtered (gdb_stdlog,
 271                     "qf->map_matching_symbols (%s, \"%s\", %s, %d, %s, %s, %s, %s)\n",
 272                     objfile_debug_name (objfile), name,
 273                     domain_name (domain), global,
 274                     host_address_to_string (callback),
 275                     host_address_to_string (data),
 276                     host_address_to_string (match),
 277                     host_address_to_string (ordered_compare));
 278
 279   debug_data->real_sf->qf->map_matching_symbols (objfile, name,
 280                                                  domain, global,
 281                                                  callback, data,
 282                                                  match,
 283                                                  ordered_compare);
 284 }
 285
 286 static void
 287 debug_qf_expand_symtabs_matching
 288   (struct objfile *objfile,
 289    gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher,
 290    gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher,
 291    gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify,
 292    enum search_domain kind)
 293 {
 294   const struct debug_sym_fns_data *debug_data
 295     = ((const struct debug_sym_fns_data *)
 296        objfile_data (objfile, symfile_debug_objfile_data_key));
 297
 298   fprintf_filtered (gdb_stdlog,
 299                     "qf->expand_symtabs_matching (%s, %s, %s, %s, %s)\n",
 300                     objfile_debug_name (objfile),
 301                     host_address_to_string (&file_matcher),
 302                     host_address_to_string (&symbol_matcher),
 303                     host_address_to_string (&expansion_notify),
 304                     search_domain_name (kind));
 305
 306   debug_data->real_sf->qf->expand_symtabs_matching (objfile,
 307                                                     file_matcher,
 308                                                     symbol_matcher,
 309                                                     expansion_notify,
 310                                                     kind);
 311 }
 312
 313 static struct compunit_symtab *
 314 debug_qf_find_pc_sect_compunit_symtab (struct objfile *objfile,
 315                                        struct bound_minimal_symbol msymbol,
 316                                        CORE_ADDR pc,
 317                                        struct obj_section *section,
 318                                        int warn_if_readin)
 319 {
 320   const struct debug_sym_fns_data *debug_data
 321     = ((const struct debug_sym_fns_data *)
 322        objfile_data (objfile, symfile_debug_objfile_data_key));
 323   struct compunit_symtab *retval;
 324
 325   fprintf_filtered (gdb_stdlog,
 326                     "qf->find_pc_sect_compunit_symtab (%s, %s, %s, %s, %d)\n",
 327                     objfile_debug_name (objfile),
 328                     host_address_to_string (msymbol.minsym),
 329                     hex_string (pc),
 330                     host_address_to_string (section),
 331                     warn_if_readin);
 332
 333   retval
 334     = debug_data->real_sf->qf->find_pc_sect_compunit_symtab (objfile, msymbol,
 335                                                              pc, section,
 336                                                              warn_if_readin);
 337
 338   fprintf_filtered (gdb_stdlog,
 339                     "qf->find_pc_sect_compunit_symtab (...) = %s\n",
 340                     retval
 341                     ? debug_symtab_name (compunit_primary_filetab (retval))
 342                     : "NULL");
 343
 344   return retval;
 345 }
 346
 347 static void
 348 debug_qf_map_symbol_filenames (struct objfile *objfile,
 349                                symbol_filename_ftype *fun, void *data,
 350                                int need_fullname)
 351 {
 352   const struct debug_sym_fns_data *debug_data
 353     = ((const struct debug_sym_fns_data *)
 354        objfile_data (objfile, symfile_debug_objfile_data_key));
 355   fprintf_filtered (gdb_stdlog,
 356                     "qf->map_symbol_filenames (%s, %s, %s, %d)\n",
 357                     objfile_debug_name (objfile),
 358                     host_address_to_string (fun),
 359                     host_address_to_string (data),
 360                     need_fullname);
 361
 362   debug_data->real_sf->qf->map_symbol_filenames (objfile, fun, data,
 363                                                  need_fullname);
 364 }
 365
 366 static const struct quick_symbol_functions debug_sym_quick_functions =
 367 {
 368   debug_qf_has_symbols,
 369   debug_qf_find_last_source_symtab,
 370   debug_qf_forget_cached_source_info,
 371   debug_qf_map_symtabs_matching_filename,
 372   debug_qf_lookup_symbol,
 373   debug_qf_print_stats,
 374   debug_qf_dump,
 375   debug_qf_relocate,
 376   debug_qf_expand_symtabs_for_function,
 377   debug_qf_expand_all_symtabs,
 378   debug_qf_expand_symtabs_with_fullname,
 379   debug_qf_map_matching_symbols,
 380   debug_qf_expand_symtabs_matching,
 381   debug_qf_find_pc_sect_compunit_symtab,
 382   debug_qf_map_symbol_filenames
 383 };
 384 \f
 385 /* Debugging version of struct sym_probe_fns.  */
 386
 387 static VEC (probe_p) *
 388 debug_sym_get_probes (struct objfile *objfile)
 389 {
 390   const struct debug_sym_fns_data *debug_data
 391     = ((const struct debug_sym_fns_data *)
 392        objfile_data (objfile, symfile_debug_objfile_data_key));
 393   VEC (probe_p) *retval;
 394
 395   retval = debug_data->real_sf->sym_probe_fns->sym_get_probes (objfile);
 396
 397   fprintf_filtered (gdb_stdlog,
 398                     "probes->sym_get_probes (%s) = %s\n",
 399                     objfile_debug_name (objfile),
 400                     host_address_to_string (retval));
 401
 402   return retval;
 403 }
 404
 405 static const struct sym_probe_fns debug_sym_probe_fns =
 406 {
 407   debug_sym_get_probes,
 408 };
 409 \f
 410 /* Debugging version of struct sym_fns.  */
 411
 412 static void
 413 debug_sym_new_init (struct objfile *objfile)
 414 {
 415   const struct debug_sym_fns_data *debug_data
 416     = ((const struct debug_sym_fns_data *)
 417        objfile_data (objfile, symfile_debug_objfile_data_key));
 418
 419   fprintf_filtered (gdb_stdlog, "sf->sym_new_init (%s)\n",
 420                     objfile_debug_name (objfile));
 421
 422   debug_data->real_sf->sym_new_init (objfile);
 423 }
 424
 425 static void
 426 debug_sym_init (struct objfile *objfile)
 427 {
 428   const struct debug_sym_fns_data *debug_data
 429     = ((const struct debug_sym_fns_data *)
 430        objfile_data (objfile, symfile_debug_objfile_data_key));
 431
 432   fprintf_filtered (gdb_stdlog, "sf->sym_init (%s)\n",
 433                     objfile_debug_name (objfile));
 434
 435   debug_data->real_sf->sym_init (objfile);
 436 }
 437
 438 static void
 439 debug_sym_read (struct objfile *objfile, symfile_add_flags symfile_flags)
 440 {
 441   const struct debug_sym_fns_data *debug_data
 442     = ((const struct debug_sym_fns_data *)
 443        objfile_data (objfile, symfile_debug_objfile_data_key));
 444
 445   fprintf_filtered (gdb_stdlog, "sf->sym_read (%s, 0x%x)\n",
 446                     objfile_debug_name (objfile), (unsigned) symfile_flags);
 447
 448   debug_data->real_sf->sym_read (objfile, symfile_flags);
 449 }
 450
 451 static void
 452 debug_sym_read_psymbols (struct objfile *objfile)
 453 {
 454   const struct debug_sym_fns_data *debug_data
 455     = ((const struct debug_sym_fns_data *)
 456        objfile_data (objfile, symfile_debug_objfile_data_key));
 457
 458   fprintf_filtered (gdb_stdlog, "sf->sym_read_psymbols (%s)\n",
 459                     objfile_debug_name (objfile));
 460
 461   debug_data->real_sf->sym_read_psymbols (objfile);
 462 }
 463
 464 static void
 465 debug_sym_finish (struct objfile *objfile)
 466 {
 467   const struct debug_sym_fns_data *debug_data
 468     = ((const struct debug_sym_fns_data *)
 469        objfile_data (objfile, symfile_debug_objfile_data_key));
 470
 471   fprintf_filtered (gdb_stdlog, "sf->sym_finish (%s)\n",
 472                     objfile_debug_name (objfile));
 473
 474   debug_data->real_sf->sym_finish (objfile);
 475 }
 476
 477 static void
 478 debug_sym_offsets (struct objfile *objfile,
 479                    const struct section_addr_info *info)
 480 {
 481   const struct debug_sym_fns_data *debug_data
 482     = ((const struct debug_sym_fns_data *)
 483        objfile_data (objfile, symfile_debug_objfile_data_key));
 484
 485   fprintf_filtered (gdb_stdlog, "sf->sym_offsets (%s, %s)\n",
 486                     objfile_debug_name (objfile),
 487                     host_address_to_string (info));
 488
 489   debug_data->real_sf->sym_offsets (objfile, info);
 490 }
 491
 492 static struct symfile_segment_data *
 493 debug_sym_segments (bfd *abfd)
 494 {
 495   /* This API function is annoying, it doesn't take a "this" pointer.
 496      Fortunately it is only used in one place where we (re-)lookup the
 497      sym_fns table to use.  Thus we will never be called.  */
 498   gdb_assert_not_reached ("debug_sym_segments called");
 499 }
 500
 501 static void
 502 debug_sym_read_linetable (struct objfile *objfile)
 503 {
 504   const struct debug_sym_fns_data *debug_data
 505     = ((const struct debug_sym_fns_data *)
 506        objfile_data (objfile, symfile_debug_objfile_data_key));
 507
 508   fprintf_filtered (gdb_stdlog, "sf->sym_read_linetable (%s)\n",
 509                     objfile_debug_name (objfile));
 510
 511   debug_data->real_sf->sym_read_linetable (objfile);
 512 }
 513
 514 static bfd_byte *
 515 debug_sym_relocate (struct objfile *objfile, asection *sectp, bfd_byte *buf)
 516 {
 517   const struct debug_sym_fns_data *debug_data
 518     = ((const struct debug_sym_fns_data *)
 519        objfile_data (objfile, symfile_debug_objfile_data_key));
 520   bfd_byte *retval;
 521
 522   retval = debug_data->real_sf->sym_relocate (objfile, sectp, buf);
 523
 524   fprintf_filtered (gdb_stdlog,
 525                     "sf->sym_relocate (%s, %s, %s) = %s\n",
 526                     objfile_debug_name (objfile),
 527                     host_address_to_string (sectp),
 528                     host_address_to_string (buf),
 529                     host_address_to_string (retval));
 530
 531   return retval;
 532 }
 533
 534 /* Template of debugging version of struct sym_fns.
 535    A copy is made, with sym_flavour updated, and a pointer to the real table
 536    installed in real_sf, and then a pointer to the copy is installed in the
 537    objfile.  */
 538
 539 static const struct sym_fns debug_sym_fns =
 540 {
 541   debug_sym_new_init,
 542   debug_sym_init,
 543   debug_sym_read,
 544   debug_sym_read_psymbols,
 545   debug_sym_finish,
 546   debug_sym_offsets,
 547   debug_sym_segments,
 548   debug_sym_read_linetable,
 549   debug_sym_relocate,
 550   &debug_sym_probe_fns,
 551   &debug_sym_quick_functions
 552 };
 553 \f
 554 /* Free the copy of sym_fns recorded in the registry.  */
 555
 556 static void
 557 symfile_debug_free_objfile (struct objfile *objfile, void *datum)
 558 {
 559   xfree (datum);
 560 }
 561
 562 /* Install the debugging versions of the symfile functions for OBJFILE.
 563    Do not call this if the debug versions are already installed.  */
 564
 565 static void
 566 install_symfile_debug_logging (struct objfile *objfile)
 567 {
 568   const struct sym_fns *real_sf;
 569   struct debug_sym_fns_data *debug_data;
 570
 571   /* The debug versions should not already be installed.  */
 572   gdb_assert (!symfile_debug_installed (objfile));
 573
 574   real_sf = objfile->sf;
 575
 576   /* Alas we have to preserve NULL entries in REAL_SF.  */
 577   debug_data = XCNEW (struct debug_sym_fns_data);
 578
 579 #define COPY_SF_PTR(from, to, name, func)       \
 580   do {                                          \
 581     if ((from)->name)                           \
 582       (to)->debug_sf.name = func;               \
 583   } while (0)
 584
 585   COPY_SF_PTR (real_sf, debug_data, sym_new_init, debug_sym_new_init);
 586   COPY_SF_PTR (real_sf, debug_data, sym_init, debug_sym_init);
 587   COPY_SF_PTR (real_sf, debug_data, sym_read, debug_sym_read);
 588   COPY_SF_PTR (real_sf, debug_data, sym_read_psymbols,
 589                debug_sym_read_psymbols);
 590   COPY_SF_PTR (real_sf, debug_data, sym_finish, debug_sym_finish);
 591   COPY_SF_PTR (real_sf, debug_data, sym_offsets, debug_sym_offsets);
 592   COPY_SF_PTR (real_sf, debug_data, sym_segments, debug_sym_segments);
 593   COPY_SF_PTR (real_sf, debug_data, sym_read_linetable,
 594                debug_sym_read_linetable);
 595   COPY_SF_PTR (real_sf, debug_data, sym_relocate, debug_sym_relocate);
 596   if (real_sf->sym_probe_fns)
 597     debug_data->debug_sf.sym_probe_fns = &debug_sym_probe_fns;
 598   debug_data->debug_sf.qf = &debug_sym_quick_functions;
 599
 600 #undef COPY_SF_PTR
 601
 602   debug_data->real_sf = real_sf;
 603   set_objfile_data (objfile, symfile_debug_objfile_data_key, debug_data);
 604   objfile->sf = &debug_data->debug_sf;
 605 }
 606
 607 /* Uninstall the debugging versions of the symfile functions for OBJFILE.
 608    Do not call this if the debug versions are not installed.  */
 609
 610 static void
 611 uninstall_symfile_debug_logging (struct objfile *objfile)
 612 {
 613   struct debug_sym_fns_data *debug_data;
 614
 615   /* The debug versions should be currently installed.  */
 616   gdb_assert (symfile_debug_installed (objfile));
 617
 618   debug_data = ((struct debug_sym_fns_data *)
 619                 objfile_data (objfile, symfile_debug_objfile_data_key));
 620
 621   objfile->sf = debug_data->real_sf;
 622   xfree (debug_data);
 623   set_objfile_data (objfile, symfile_debug_objfile_data_key, NULL);
 624 }
 625
 626 /* Call this function to set OBJFILE->SF.
 627    Do not set OBJFILE->SF directly.  */
 628
 629 void
 630 objfile_set_sym_fns (struct objfile *objfile, const struct sym_fns *sf)
 631 {
 632   if (symfile_debug_installed (objfile))
 633     {
 634       gdb_assert (debug_symfile);
 635       /* Remove the current one, and reinstall a new one later.  */
 636       uninstall_symfile_debug_logging (objfile);
 637     }
 638
 639   /* Assume debug logging is disabled.  */
 640   objfile->sf = sf;
 641
 642   /* Turn debug logging on if enabled.  */
 643   if (debug_symfile)
 644     install_symfile_debug_logging (objfile);
 645 }
 646
 647 static void
 648 set_debug_symfile (char *args, int from_tty, struct cmd_list_element *c)
 649 {
 650   struct program_space *pspace;
 651   struct objfile *objfile;
 652
 653   ALL_PSPACES (pspace)
 654     ALL_PSPACE_OBJFILES (pspace, objfile)
 655     {
 656       if (debug_symfile)
 657         {
 658           if (!symfile_debug_installed (objfile))
 659             install_symfile_debug_logging (objfile);
 660         }
 661       else
 662         {
 663           if (symfile_debug_installed (objfile))
 664             uninstall_symfile_debug_logging (objfile);
 665         }
 666     }
 667 }
 668
 669 static void
 670 show_debug_symfile (struct ui_file *file, int from_tty,
 671                         struct cmd_list_element *c, const char *value)
 672 {
 673   fprintf_filtered (file, _("Symfile debugging is %s.\n"), value);
 674 }
 675
 676 initialize_file_ftype _initialize_symfile_debug;
 677
 678 void
 679 _initialize_symfile_debug (void)
 680 {
 681   symfile_debug_objfile_data_key
 682     = register_objfile_data_with_cleanup (NULL, symfile_debug_free_objfile);
 683
 684   add_setshow_boolean_cmd ("symfile", no_class, &debug_symfile, _("\
 685 Set debugging of the symfile functions."), _("\
 686 Show debugging of the symfile functions."), _("\
 687 When enabled, all calls to the symfile functions are logged."),
 688                            set_debug_symfile, show_debug_symfile,
 689                            &setdebuglist, &showdebuglist);
 690
 691   /* Note: We don't need a new-objfile observer because debug logging
 692      will be installed when objfile init'n calls objfile_set_sym_fns.  */
 693 }