gdb/inferior.c

   1 /* Multi-process control for GDB, the GNU debugger.
   2
   3    Copyright (C) 2008-2014 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "defs.h"
  21 #include "exec.h"
  22 #include "inferior.h"
  23 #include "target.h"
  24 #include "command.h"
  25 #include "completer.h"
  26 #include "gdbcmd.h"
  27 #include "gdbthread.h"
  28 #include "ui-out.h"
  29 #include "observer.h"
  30 #include "gdbcore.h"
  31 #include "symfile.h"
  32 #include "environ.h"
  33 #include "cli/cli-utils.h"
  34 #include "continuations.h"
  35 #include "arch-utils.h"
  36 #include "target-descriptions.h"
  37 #include "readline/tilde.h"
  38
  39 void _initialize_inferiors (void);
  40
  41 /* Keep a registry of per-inferior data-pointers required by other GDB
  42    modules.  */
  43
  44 DEFINE_REGISTRY (inferior, REGISTRY_ACCESS_FIELD)
  45
  46 struct inferior *inferior_list = NULL;
  47 static int highest_inferior_num;
  48
  49 /* Print notices on inferior events (attach, detach, etc.), set with
  50    `set print inferior-events'.  */
  51 static int print_inferior_events = 0;
  52
  53 /* The Current Inferior.  */
  54 static struct inferior *current_inferior_ = NULL;
  55
  56 struct inferior*
  57 current_inferior (void)
  58 {
  59   return current_inferior_;
  60 }
  61
  62 void
  63 set_current_inferior (struct inferior *inf)
  64 {
  65   /* There's always an inferior.  */
  66   gdb_assert (inf != NULL);
  67
  68   current_inferior_ = inf;
  69 }
  70
  71 /* A cleanups callback, helper for save_current_program_space
  72    below.  */
  73
  74 static void
  75 restore_inferior (void *arg)
  76 {
  77   struct inferior *saved_inferior = arg;
  78
  79   set_current_inferior (saved_inferior);
  80 }
  81
  82 /* Save the current program space so that it may be restored by a later
  83    call to do_cleanups.  Returns the struct cleanup pointer needed for
  84    later doing the cleanup.  */
  85
  86 struct cleanup *
  87 save_current_inferior (void)
  88 {
  89   struct cleanup *old_chain = make_cleanup (restore_inferior,
  90                                             current_inferior_);
  91
  92   return old_chain;
  93 }
  94
  95 static void
  96 free_inferior (struct inferior *inf)
  97 {
  98   discard_all_inferior_continuations (inf);
  99   inferior_free_data (inf);
 100   xfree (inf->args);
 101   xfree (inf->terminal);
 102   free_environ (inf->environment);
 103   target_desc_info_free (inf->tdesc_info);
 104   xfree (inf->private);
 105   xfree (inf);
 106 }
 107
 108 void
 109 init_inferior_list (void)
 110 {
 111   struct inferior *inf, *infnext;
 112
 113   highest_inferior_num = 0;
 114   if (!inferior_list)
 115     return;
 116
 117   for (inf = inferior_list; inf; inf = infnext)
 118     {
 119       infnext = inf->next;
 120       free_inferior (inf);
 121     }
 122
 123   inferior_list = NULL;
 124 }
 125
 126 struct inferior *
 127 add_inferior_silent (int pid)
 128 {
 129   struct inferior *inf;
 130
 131   inf = xmalloc (sizeof (*inf));
 132   memset (inf, 0, sizeof (*inf));
 133   inf->pid = pid;
 134
 135   inf->control.stop_soon = NO_STOP_QUIETLY;
 136
 137   inf->num = ++highest_inferior_num;
 138   inf->next = inferior_list;
 139   inferior_list = inf;
 140
 141   inf->environment = make_environ ();
 142   init_environ (inf->environment);
 143
 144   inferior_alloc_data (inf);
 145
 146   observer_notify_inferior_added (inf);
 147
 148   if (pid != 0)
 149     inferior_appeared (inf, pid);
 150
 151   return inf;
 152 }
 153
 154 struct inferior *
 155 add_inferior (int pid)
 156 {
 157   struct inferior *inf = add_inferior_silent (pid);
 158
 159   if (print_inferior_events)
 160     printf_unfiltered (_("[New inferior %d]\n"), pid);
 161
 162   return inf;
 163 }
 164
 165 struct delete_thread_of_inferior_arg
 166 {
 167   int pid;
 168   int silent;
 169 };
 170
 171 static int
 172 delete_thread_of_inferior (struct thread_info *tp, void *data)
 173 {
 174   struct delete_thread_of_inferior_arg *arg = data;
 175
 176   if (ptid_get_pid (tp->ptid) == arg->pid)
 177     {
 178       if (arg->silent)
 179         delete_thread_silent (tp->ptid);
 180       else
 181         delete_thread (tp->ptid);
 182     }
 183
 184   return 0;
 185 }
 186
 187 /* If SILENT then be quiet -- don't announce a inferior death, or the
 188    exit of its threads.  */
 189
 190 void
 191 delete_inferior_1 (struct inferior *todel, int silent)
 192 {
 193   struct inferior *inf, *infprev;
 194   struct delete_thread_of_inferior_arg arg;
 195
 196   infprev = NULL;
 197
 198   for (inf = inferior_list; inf; infprev = inf, inf = inf->next)
 199     if (inf == todel)
 200       break;
 201
 202   if (!inf)
 203     return;
 204
 205   arg.pid = inf->pid;
 206   arg.silent = silent;
 207
 208   iterate_over_threads (delete_thread_of_inferior, &arg);
 209
 210   if (infprev)
 211     infprev->next = inf->next;
 212   else
 213     inferior_list = inf->next;
 214
 215   observer_notify_inferior_removed (inf);
 216
 217   free_inferior (inf);
 218 }
 219
 220 void
 221 delete_inferior (int pid)
 222 {
 223   struct inferior *inf = find_inferior_pid (pid);
 224
 225   delete_inferior_1 (inf, 0);
 226
 227   if (print_inferior_events)
 228     printf_unfiltered (_("[Inferior %d exited]\n"), pid);
 229 }
 230
 231 void
 232 delete_inferior_silent (int pid)
 233 {
 234   struct inferior *inf = find_inferior_pid (pid);
 235
 236   delete_inferior_1 (inf, 1);
 237 }
 238
 239
 240 /* If SILENT then be quiet -- don't announce a inferior exit, or the
 241    exit of its threads.  */
 242
 243 static void
 244 exit_inferior_1 (struct inferior *inftoex, int silent)
 245 {
 246   struct inferior *inf;
 247   struct delete_thread_of_inferior_arg arg;
 248
 249   for (inf = inferior_list; inf; inf = inf->next)
 250     if (inf == inftoex)
 251       break;
 252
 253   if (!inf)
 254     return;
 255
 256   arg.pid = inf->pid;
 257   arg.silent = silent;
 258
 259   iterate_over_threads (delete_thread_of_inferior, &arg);
 260
 261   /* Notify the observers before removing the inferior from the list,
 262      so that the observers have a chance to look it up.  */
 263   observer_notify_inferior_exit (inf);
 264
 265   inf->pid = 0;
 266   inf->fake_pid_p = 0;
 267   if (inf->vfork_parent != NULL)
 268     {
 269       inf->vfork_parent->vfork_child = NULL;
 270       inf->vfork_parent = NULL;
 271     }
 272   if (inf->vfork_child != NULL)
 273     {
 274       inf->vfork_child->vfork_parent = NULL;
 275       inf->vfork_child = NULL;
 276     }
 277
 278   inf->pending_detach = 0;
 279 }
 280
 281 void
 282 exit_inferior (int pid)
 283 {
 284   struct inferior *inf = find_inferior_pid (pid);
 285
 286   exit_inferior_1 (inf, 0);
 287
 288   if (print_inferior_events)
 289     printf_unfiltered (_("[Inferior %d exited]\n"), pid);
 290 }
 291
 292 void
 293 exit_inferior_silent (int pid)
 294 {
 295   struct inferior *inf = find_inferior_pid (pid);
 296
 297   exit_inferior_1 (inf, 1);
 298 }
 299
 300 void
 301 exit_inferior_num_silent (int num)
 302 {
 303   struct inferior *inf = find_inferior_id (num);
 304
 305   exit_inferior_1 (inf, 1);
 306 }
 307
 308 void
 309 detach_inferior (int pid)
 310 {
 311   struct inferior *inf = find_inferior_pid (pid);
 312
 313   exit_inferior_1 (inf, 1);
 314
 315   if (print_inferior_events)
 316     printf_unfiltered (_("[Inferior %d detached]\n"), pid);
 317 }
 318
 319 void
 320 inferior_appeared (struct inferior *inf, int pid)
 321 {
 322   inf->pid = pid;
 323   inf->has_exit_code = 0;
 324   inf->exit_code = 0;
 325
 326   observer_notify_inferior_appeared (inf);
 327 }
 328
 329 void
 330 discard_all_inferiors (void)
 331 {
 332   struct inferior *inf;
 333
 334   for (inf = inferior_list; inf; inf = inf->next)
 335     {
 336       if (inf->pid != 0)
 337         exit_inferior_silent (inf->pid);
 338     }
 339 }
 340
 341 struct inferior *
 342 find_inferior_id (int num)
 343 {
 344   struct inferior *inf;
 345
 346   for (inf = inferior_list; inf; inf = inf->next)
 347     if (inf->num == num)
 348       return inf;
 349
 350   return NULL;
 351 }
 352
 353 struct inferior *
 354 find_inferior_pid (int pid)
 355 {
 356   struct inferior *inf;
 357
 358   /* Looking for inferior pid == 0 is always wrong, and indicative of
 359      a bug somewhere else.  There may be more than one with pid == 0,
 360      for instance.  */
 361   gdb_assert (pid != 0);
 362
 363   for (inf = inferior_list; inf; inf = inf->next)
 364     if (inf->pid == pid)
 365       return inf;
 366
 367   return NULL;
 368 }
 369
 370 /* See inferior.h.  */
 371
 372 struct inferior *
 373 find_inferior_for_program_space (struct program_space *pspace)
 374 {
 375   struct inferior *inf = current_inferior ();
 376
 377   if (inf->pspace == pspace)
 378     return inf;
 379
 380   for (inf = inferior_list; inf != NULL; inf = inf->next)
 381     {
 382       if (inf->pspace == pspace)
 383         return inf;
 384     }
 385
 386   return NULL;
 387 }
 388
 389 struct inferior *
 390 iterate_over_inferiors (int (*callback) (struct inferior *, void *),
 391                         void *data)
 392 {
 393   struct inferior *inf, *infnext;
 394
 395   for (inf = inferior_list; inf; inf = infnext)
 396     {
 397       infnext = inf->next;
 398       if ((*callback) (inf, data))
 399         return inf;
 400     }
 401
 402   return NULL;
 403 }
 404
 405 int
 406 valid_gdb_inferior_id (int num)
 407 {
 408   struct inferior *inf;
 409
 410   for (inf = inferior_list; inf; inf = inf->next)
 411     if (inf->num == num)
 412       return 1;
 413
 414   return 0;
 415 }
 416
 417 int
 418 pid_to_gdb_inferior_id (int pid)
 419 {
 420   struct inferior *inf;
 421
 422   for (inf = inferior_list; inf; inf = inf->next)
 423     if (inf->pid == pid)
 424       return inf->num;
 425
 426   return 0;
 427 }
 428
 429 int
 430 gdb_inferior_id_to_pid (int num)
 431 {
 432   struct inferior *inferior = find_inferior_id (num);
 433   if (inferior)
 434     return inferior->pid;
 435   else
 436     return -1;
 437 }
 438
 439 int
 440 in_inferior_list (int pid)
 441 {
 442   struct inferior *inf;
 443
 444   for (inf = inferior_list; inf; inf = inf->next)
 445     if (inf->pid == pid)
 446       return 1;
 447
 448   return 0;
 449 }
 450
 451 int
 452 have_inferiors (void)
 453 {
 454   struct inferior *inf;
 455
 456   for (inf = inferior_list; inf; inf = inf->next)
 457     if (inf->pid != 0)
 458       return 1;
 459
 460   return 0;
 461 }
 462
 463 int
 464 have_live_inferiors (void)
 465 {
 466   struct inferior *inf;
 467
 468   for (inf = inferior_list; inf; inf = inf->next)
 469     if (inf->pid != 0)
 470       {
 471         struct thread_info *tp;
 472
 473         tp = any_thread_of_process (inf->pid);
 474         if (tp && target_has_execution_1 (tp->ptid))
 475           break;
 476       }
 477
 478   return inf != NULL;
 479 }
 480
 481 /* Prune away any unused inferiors, and then prune away no longer used
 482    program spaces.  */
 483
 484 void
 485 prune_inferiors (void)
 486 {
 487   struct inferior *ss, **ss_link;
 488   struct inferior *current = current_inferior ();
 489
 490   ss = inferior_list;
 491   ss_link = &inferior_list;
 492   while (ss)
 493     {
 494       if (ss == current
 495           || !ss->removable
 496           || ss->pid != 0)
 497         {
 498           ss_link = &ss->next;
 499           ss = *ss_link;
 500           continue;
 501         }
 502
 503       *ss_link = ss->next;
 504       delete_inferior_1 (ss, 1);
 505       ss = *ss_link;
 506     }
 507
 508   prune_program_spaces ();
 509 }
 510
 511 /* Simply returns the count of inferiors.  */
 512
 513 int
 514 number_of_inferiors (void)
 515 {
 516   struct inferior *inf;
 517   int count = 0;
 518
 519   for (inf = inferior_list; inf != NULL; inf = inf->next)
 520     count++;
 521
 522   return count;
 523 }
 524
 525 /* Converts an inferior process id to a string.  Like
 526    target_pid_to_str, but special cases the null process.  */
 527
 528 static char *
 529 inferior_pid_to_str (int pid)
 530 {
 531   if (pid != 0)
 532     return target_pid_to_str (pid_to_ptid (pid));
 533   else
 534     return _("<null>");
 535 }
 536
 537 /* Prints the list of inferiors and their details on UIOUT.  This is a
 538    version of 'info_inferior_command' suitable for use from MI.
 539
 540    If REQUESTED_INFERIORS is not NULL, it's a list of GDB ids of the
 541    inferiors that should be printed.  Otherwise, all inferiors are
 542    printed.  */
 543
 544 static void
 545 print_inferior (struct ui_out *uiout, char *requested_inferiors)
 546 {
 547   struct inferior *inf;
 548   struct cleanup *old_chain;
 549   int inf_count = 0;
 550
 551   /* Compute number of inferiors we will print.  */
 552   for (inf = inferior_list; inf; inf = inf->next)
 553     {
 554       if (!number_is_in_list (requested_inferiors, inf->num))
 555         continue;
 556
 557       ++inf_count;
 558     }
 559
 560   if (inf_count == 0)
 561     {
 562       ui_out_message (uiout, 0, "No inferiors.\n");
 563       return;
 564     }
 565
 566   old_chain = make_cleanup_ui_out_table_begin_end (uiout, 4, inf_count,
 567                                                    "inferiors");
 568   ui_out_table_header (uiout, 1, ui_left, "current", "");
 569   ui_out_table_header (uiout, 4, ui_left, "number", "Num");
 570   ui_out_table_header (uiout, 17, ui_left, "target-id", "Description");
 571   ui_out_table_header (uiout, 17, ui_left, "exec", "Executable");
 572
 573   ui_out_table_body (uiout);
 574   for (inf = inferior_list; inf; inf = inf->next)
 575     {
 576       struct cleanup *chain2;
 577
 578       if (!number_is_in_list (requested_inferiors, inf->num))
 579         continue;
 580
 581       chain2 = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
 582
 583       if (inf == current_inferior ())
 584         ui_out_field_string (uiout, "current", "*");
 585       else
 586         ui_out_field_skip (uiout, "current");
 587
 588       ui_out_field_int (uiout, "number", inf->num);
 589
 590       ui_out_field_string (uiout, "target-id",
 591                            inferior_pid_to_str (inf->pid));
 592
 593       if (inf->pspace->pspace_exec_filename != NULL)
 594         ui_out_field_string (uiout, "exec", inf->pspace->pspace_exec_filename);
 595       else
 596         ui_out_field_skip (uiout, "exec");
 597
 598       /* Print extra info that isn't really fit to always present in
 599          tabular form.  Currently we print the vfork parent/child
 600          relationships, if any.  */
 601       if (inf->vfork_parent)
 602         {
 603           ui_out_text (uiout, _("\n\tis vfork child of inferior "));
 604           ui_out_field_int (uiout, "vfork-parent", inf->vfork_parent->num);
 605         }
 606       if (inf->vfork_child)
 607         {
 608           ui_out_text (uiout, _("\n\tis vfork parent of inferior "));
 609           ui_out_field_int (uiout, "vfork-child", inf->vfork_child->num);
 610         }
 611
 612       ui_out_text (uiout, "\n");
 613       do_cleanups (chain2);
 614     }
 615
 616   do_cleanups (old_chain);
 617 }
 618
 619 static void
 620 detach_inferior_command (char *args, int from_tty)
 621 {
 622   int num, pid;
 623   struct thread_info *tp;
 624   struct get_number_or_range_state state;
 625
 626   if (!args || !*args)
 627     error (_("Requires argument (inferior id(s) to detach)"));
 628
 629   init_number_or_range (&state, args);
 630   while (!state.finished)
 631     {
 632       num = get_number_or_range (&state);
 633
 634       if (!valid_gdb_inferior_id (num))
 635         {
 636           warning (_("Inferior ID %d not known."), num);
 637           continue;
 638         }
 639
 640       pid = gdb_inferior_id_to_pid (num);
 641
 642       tp = any_thread_of_process (pid);
 643       if (!tp)
 644         {
 645           warning (_("Inferior ID %d has no threads."), num);
 646           continue;
 647         }
 648
 649       switch_to_thread (tp->ptid);
 650
 651       detach_command (NULL, from_tty);
 652     }
 653 }
 654
 655 static void
 656 kill_inferior_command (char *args, int from_tty)
 657 {
 658   int num, pid;
 659   struct thread_info *tp;
 660   struct get_number_or_range_state state;
 661
 662   if (!args || !*args)
 663     error (_("Requires argument (inferior id(s) to kill)"));
 664
 665   init_number_or_range (&state, args);
 666   while (!state.finished)
 667     {
 668       num = get_number_or_range (&state);
 669
 670       if (!valid_gdb_inferior_id (num))
 671         {
 672           warning (_("Inferior ID %d not known."), num);
 673           continue;
 674         }
 675
 676       pid = gdb_inferior_id_to_pid (num);
 677
 678       tp = any_thread_of_process (pid);
 679       if (!tp)
 680         {
 681           warning (_("Inferior ID %d has no threads."), num);
 682           continue;
 683         }
 684
 685       switch_to_thread (tp->ptid);
 686
 687       target_kill ();
 688     }
 689
 690   bfd_cache_close_all ();
 691 }
 692
 693 static void
 694 inferior_command (char *args, int from_tty)
 695 {
 696   struct inferior *inf;
 697   int num;
 698
 699   num = parse_and_eval_long (args);
 700
 701   inf = find_inferior_id (num);
 702   if (inf == NULL)
 703     error (_("Inferior ID %d not known."), num);
 704
 705   printf_filtered (_("[Switching to inferior %d [%s] (%s)]\n"),
 706                    inf->num,
 707                    inferior_pid_to_str (inf->pid),
 708                    (inf->pspace->pspace_exec_filename != NULL
 709                     ? inf->pspace->pspace_exec_filename
 710                     : _("<noexec>")));
 711
 712   if (inf->pid != 0)
 713     {
 714       if (inf->pid != ptid_get_pid (inferior_ptid))
 715         {
 716           struct thread_info *tp;
 717
 718           tp = any_thread_of_process (inf->pid);
 719           if (!tp)
 720             error (_("Inferior has no threads."));
 721
 722           switch_to_thread (tp->ptid);
 723         }
 724
 725       printf_filtered (_("[Switching to thread %d (%s)] "),
 726                        pid_to_thread_id (inferior_ptid),
 727                        target_pid_to_str (inferior_ptid));
 728     }
 729   else
 730     {
 731       struct inferior *inf;
 732
 733       inf = find_inferior_id (num);
 734       set_current_inferior (inf);
 735       switch_to_thread (null_ptid);
 736       set_current_program_space (inf->pspace);
 737     }
 738
 739   if (inf->pid != 0 && is_running (inferior_ptid))
 740     ui_out_text (current_uiout, "(running)\n");
 741   else if (inf->pid != 0)
 742     {
 743       ui_out_text (current_uiout, "\n");
 744       print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1);
 745     }
 746 }
 747
 748 /* Print information about currently known inferiors.  */
 749
 750 static void
 751 info_inferiors_command (char *args, int from_tty)
 752 {
 753   print_inferior (current_uiout, args);
 754 }
 755
 756 /* remove-inferior ID */
 757
 758 static void
 759 remove_inferior_command (char *args, int from_tty)
 760 {
 761   int num;
 762   struct inferior *inf;
 763   struct get_number_or_range_state state;
 764
 765   if (args == NULL || *args == '\0')
 766     error (_("Requires an argument (inferior id(s) to remove)"));
 767
 768   init_number_or_range (&state, args);
 769   while (!state.finished)
 770     {
 771       num = get_number_or_range (&state);
 772       inf = find_inferior_id (num);
 773
 774       if (inf == NULL)
 775         {
 776           warning (_("Inferior ID %d not known."), num);
 777           continue;
 778         }
 779
 780       if (inf == current_inferior ())
 781         {
 782           warning (_("Can not remove current symbol inferior %d."), num);
 783           continue;
 784         }
 785
 786       if (inf->pid != 0)
 787         {
 788           warning (_("Can not remove active inferior %d."), num);
 789           continue;
 790         }
 791
 792       delete_inferior_1 (inf, 1);
 793     }
 794
 795   prune_program_spaces ();
 796 }
 797
 798 struct inferior *
 799 add_inferior_with_spaces (void)
 800 {
 801   struct address_space *aspace;
 802   struct program_space *pspace;
 803   struct inferior *inf;
 804   struct gdbarch_info info;
 805
 806   /* If all inferiors share an address space on this system, this
 807      doesn't really return a new address space; otherwise, it
 808      really does.  */
 809   aspace = maybe_new_address_space ();
 810   pspace = add_program_space (aspace);
 811   inf = add_inferior (0);
 812   inf->pspace = pspace;
 813   inf->aspace = pspace->aspace;
 814
 815   /* Setup the inferior's initial arch, based on information obtained
 816      from the global "set ..." options.  */
 817   gdbarch_info_init (&info);
 818   inf->gdbarch = gdbarch_find_by_info (info);
 819   /* The "set ..." options reject invalid settings, so we should
 820      always have a valid arch by now.  */
 821   gdb_assert (inf->gdbarch != NULL);
 822
 823   return inf;
 824 }
 825
 826 /* add-inferior [-copies N] [-exec FILENAME]  */
 827
 828 static void
 829 add_inferior_command (char *args, int from_tty)
 830 {
 831   int i, copies = 1;
 832   char *exec = NULL;
 833   char **argv;
 834   struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
 835
 836   if (args)
 837     {
 838       argv = gdb_buildargv (args);
 839       make_cleanup_freeargv (argv);
 840
 841       for (; *argv != NULL; argv++)
 842         {
 843           if (**argv == '-')
 844             {
 845               if (strcmp (*argv, "-copies") == 0)
 846                 {
 847                   ++argv;
 848                   if (!*argv)
 849                     error (_("No argument to -copies"));
 850                   copies = parse_and_eval_long (*argv);
 851                 }
 852               else if (strcmp (*argv, "-exec") == 0)
 853                 {
 854                   ++argv;
 855                   if (!*argv)
 856                     error (_("No argument to -exec"));
 857                   exec = tilde_expand (*argv);
 858                   make_cleanup (xfree, exec);
 859                 }
 860             }
 861           else
 862             error (_("Invalid argument"));
 863         }
 864     }
 865
 866   save_current_space_and_thread ();
 867
 868   for (i = 0; i < copies; ++i)
 869     {
 870       struct inferior *inf = add_inferior_with_spaces ();
 871
 872       printf_filtered (_("Added inferior %d\n"), inf->num);
 873
 874       if (exec != NULL)
 875         {
 876           /* Switch over temporarily, while reading executable and
 877              symbols.q.  */
 878           set_current_program_space (inf->pspace);
 879           set_current_inferior (inf);
 880           switch_to_thread (null_ptid);
 881
 882           exec_file_attach (exec, from_tty);
 883           symbol_file_add_main (exec, from_tty);
 884         }
 885     }
 886
 887   do_cleanups (old_chain);
 888 }
 889
 890 /* clone-inferior [-copies N] [ID] */
 891
 892 static void
 893 clone_inferior_command (char *args, int from_tty)
 894 {
 895   int i, copies = 1;
 896   char **argv;
 897   struct inferior *orginf = NULL;
 898   struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
 899
 900   if (args)
 901     {
 902       argv = gdb_buildargv (args);
 903       make_cleanup_freeargv (argv);
 904
 905       for (; *argv != NULL; argv++)
 906         {
 907           if (**argv == '-')
 908             {
 909               if (strcmp (*argv, "-copies") == 0)
 910                 {
 911                   ++argv;
 912                   if (!*argv)
 913                     error (_("No argument to -copies"));
 914                   copies = parse_and_eval_long (*argv);
 915
 916                   if (copies < 0)
 917                     error (_("Invalid copies number"));
 918                 }
 919             }
 920           else
 921             {
 922               if (orginf == NULL)
 923                 {
 924                   int num;
 925
 926                   /* The first non-option (-) argument specified the
 927                      program space ID.  */
 928                   num = parse_and_eval_long (*argv);
 929                   orginf = find_inferior_id (num);
 930
 931                   if (orginf == NULL)
 932                     error (_("Inferior ID %d not known."), num);
 933                   continue;
 934                 }
 935               else
 936                 error (_("Invalid argument"));
 937             }
 938         }
 939     }
 940
 941   /* If no inferior id was specified, then the user wants to clone the
 942      current inferior.  */
 943   if (orginf == NULL)
 944     orginf = current_inferior ();
 945
 946   save_current_space_and_thread ();
 947
 948   for (i = 0; i < copies; ++i)
 949     {
 950       struct address_space *aspace;
 951       struct program_space *pspace;
 952       struct inferior *inf;
 953
 954       /* If all inferiors share an address space on this system, this
 955          doesn't really return a new address space; otherwise, it
 956          really does.  */
 957       aspace = maybe_new_address_space ();
 958       pspace = add_program_space (aspace);
 959       inf = add_inferior (0);
 960       inf->pspace = pspace;
 961       inf->aspace = pspace->aspace;
 962       inf->gdbarch = orginf->gdbarch;
 963
 964       /* If the original inferior had a user specified target
 965          description, make the clone use it too.  */
 966       if (target_desc_info_from_user_p (inf->tdesc_info))
 967         copy_inferior_target_desc_info (inf, orginf);
 968
 969       printf_filtered (_("Added inferior %d.\n"), inf->num);
 970
 971       set_current_inferior (inf);
 972       switch_to_thread (null_ptid);
 973       clone_program_space (pspace, orginf->pspace);
 974     }
 975
 976   do_cleanups (old_chain);
 977 }
 978
 979 /* Print notices when new inferiors are created and die.  */
 980 static void
 981 show_print_inferior_events (struct ui_file *file, int from_tty,
 982                            struct cmd_list_element *c, const char *value)
 983 {
 984   fprintf_filtered (file, _("Printing of inferior events is %s.\n"), value);
 985 }
 986
 987 \f
 988
 989 void
 990 initialize_inferiors (void)
 991 {
 992   struct cmd_list_element *c = NULL;
 993
 994   /* There's always one inferior.  Note that this function isn't an
 995      automatic _initialize_foo function, since other _initialize_foo
 996      routines may need to install their per-inferior data keys.  We
 997      can only allocate an inferior when all those modules have done
 998      that.  Do this after initialize_progspace, due to the
 999      current_program_space reference.  */
1000   current_inferior_ = add_inferior (0);
1001   current_inferior_->pspace = current_program_space;
1002   current_inferior_->aspace = current_program_space->aspace;
1003   /* The architecture will be initialized shortly, by
1004      initialize_current_architecture.  */
1005
1006   add_info ("inferiors", info_inferiors_command,
1007             _("IDs of specified inferiors (all inferiors if no argument)."));
1008
1009   c = add_com ("add-inferior", no_class, add_inferior_command, _("\
1010 Add a new inferior.\n\
1011 Usage: add-inferior [-copies <N>] [-exec <FILENAME>]\n\
1012 N is the optional number of inferiors to add, default is 1.\n\
1013 FILENAME is the file name of the executable to use\n\
1014 as main program."));
1015   set_cmd_completer (c, filename_completer);
1016
1017   add_com ("remove-inferiors", no_class, remove_inferior_command, _("\
1018 Remove inferior ID (or list of IDs).\n\
1019 Usage: remove-inferiors ID..."));
1020
1021   add_com ("clone-inferior", no_class, clone_inferior_command, _("\
1022 Clone inferior ID.\n\
1023 Usage: clone-inferior [-copies <N>] [ID]\n\
1024 Add N copies of inferior ID.  The new inferior has the same\n\
1025 executable loaded as the copied inferior.  If -copies is not specified,\n\
1026 adds 1 copy.  If ID is not specified, it is the current inferior\n\
1027 that is cloned."));
1028
1029   add_cmd ("inferiors", class_run, detach_inferior_command, _("\
1030 Detach from inferior ID (or list of IDS)."),
1031            &detachlist);
1032
1033   add_cmd ("inferiors", class_run, kill_inferior_command, _("\
1034 Kill inferior ID (or list of IDs)."),
1035            &killlist);
1036
1037   add_cmd ("inferior", class_run, inferior_command, _("\
1038 Use this command to switch between inferiors.\n\
1039 The new inferior ID must be currently known."),
1040            &cmdlist);
1041
1042   add_setshow_boolean_cmd ("inferior-events", no_class,
1043          &print_inferior_events, _("\
1044 Set printing of inferior events (e.g., inferior start and exit)."), _("\
1045 Show printing of inferior events (e.g., inferior start and exit)."), NULL,
1046          NULL,
1047          show_print_inferior_events,
1048          &setprintlist, &showprintlist);
1049
1050 }