| 1 | /* Multi-process control for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 2008-2019 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 "observable.h" |
| 30 | #include "gdbcore.h" |
| 31 | #include "symfile.h" |
| 32 | #include "gdbsupport/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 | #include "progspace-and-thread.h" |
| 39 | |
| 40 | /* Keep a registry of per-inferior data-pointers required by other GDB |
| 41 | modules. */ |
| 42 | |
| 43 | DEFINE_REGISTRY (inferior, REGISTRY_ACCESS_FIELD) |
| 44 | |
| 45 | struct inferior *inferior_list = NULL; |
| 46 | static int highest_inferior_num; |
| 47 | |
| 48 | /* See inferior.h. */ |
| 49 | bool print_inferior_events = true; |
| 50 | |
| 51 | /* The Current Inferior. This is a strong reference. I.e., whenever |
| 52 | an inferior is the current inferior, its refcount is |
| 53 | incremented. */ |
| 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 | inf->incref (); |
| 69 | current_inferior_->decref (); |
| 70 | current_inferior_ = inf; |
| 71 | } |
| 72 | |
| 73 | private_inferior::~private_inferior () = default; |
| 74 | |
| 75 | inferior::~inferior () |
| 76 | { |
| 77 | inferior *inf = this; |
| 78 | |
| 79 | discard_all_inferior_continuations (inf); |
| 80 | inferior_free_data (inf); |
| 81 | xfree (inf->args); |
| 82 | xfree (inf->terminal); |
| 83 | target_desc_info_free (inf->tdesc_info); |
| 84 | } |
| 85 | |
| 86 | inferior::inferior (int pid_) |
| 87 | : num (++highest_inferior_num), |
| 88 | pid (pid_), |
| 89 | environment (gdb_environ::from_host_environ ()), |
| 90 | registry_data () |
| 91 | { |
| 92 | inferior_alloc_data (this); |
| 93 | } |
| 94 | |
| 95 | struct inferior * |
| 96 | add_inferior_silent (int pid) |
| 97 | { |
| 98 | inferior *inf = new inferior (pid); |
| 99 | |
| 100 | if (inferior_list == NULL) |
| 101 | inferior_list = inf; |
| 102 | else |
| 103 | { |
| 104 | inferior *last; |
| 105 | |
| 106 | for (last = inferior_list; last->next != NULL; last = last->next) |
| 107 | ; |
| 108 | last->next = inf; |
| 109 | } |
| 110 | |
| 111 | gdb::observers::inferior_added.notify (inf); |
| 112 | |
| 113 | if (pid != 0) |
| 114 | inferior_appeared (inf, pid); |
| 115 | |
| 116 | return inf; |
| 117 | } |
| 118 | |
| 119 | struct inferior * |
| 120 | add_inferior (int pid) |
| 121 | { |
| 122 | struct inferior *inf = add_inferior_silent (pid); |
| 123 | |
| 124 | if (print_inferior_events) |
| 125 | { |
| 126 | if (pid != 0) |
| 127 | printf_unfiltered (_("[New inferior %d (%s)]\n"), |
| 128 | inf->num, |
| 129 | target_pid_to_str (ptid_t (pid)).c_str ()); |
| 130 | else |
| 131 | printf_unfiltered (_("[New inferior %d]\n"), inf->num); |
| 132 | } |
| 133 | |
| 134 | return inf; |
| 135 | } |
| 136 | |
| 137 | void |
| 138 | delete_inferior (struct inferior *todel) |
| 139 | { |
| 140 | struct inferior *inf, *infprev; |
| 141 | |
| 142 | infprev = NULL; |
| 143 | |
| 144 | for (inf = inferior_list; inf; infprev = inf, inf = inf->next) |
| 145 | if (inf == todel) |
| 146 | break; |
| 147 | |
| 148 | if (!inf) |
| 149 | return; |
| 150 | |
| 151 | for (thread_info *tp : inf->threads_safe ()) |
| 152 | delete_thread_silent (tp); |
| 153 | |
| 154 | if (infprev) |
| 155 | infprev->next = inf->next; |
| 156 | else |
| 157 | inferior_list = inf->next; |
| 158 | |
| 159 | gdb::observers::inferior_removed.notify (inf); |
| 160 | |
| 161 | /* If this program space is rendered useless, remove it. */ |
| 162 | if (program_space_empty_p (inf->pspace)) |
| 163 | delete_program_space (inf->pspace); |
| 164 | |
| 165 | delete inf; |
| 166 | } |
| 167 | |
| 168 | /* If SILENT then be quiet -- don't announce a inferior exit, or the |
| 169 | exit of its threads. */ |
| 170 | |
| 171 | static void |
| 172 | exit_inferior_1 (struct inferior *inftoex, int silent) |
| 173 | { |
| 174 | struct inferior *inf; |
| 175 | |
| 176 | for (inf = inferior_list; inf; inf = inf->next) |
| 177 | if (inf == inftoex) |
| 178 | break; |
| 179 | |
| 180 | if (!inf) |
| 181 | return; |
| 182 | |
| 183 | for (thread_info *tp : inf->threads_safe ()) |
| 184 | { |
| 185 | if (silent) |
| 186 | delete_thread_silent (tp); |
| 187 | else |
| 188 | delete_thread (tp); |
| 189 | } |
| 190 | |
| 191 | gdb::observers::inferior_exit.notify (inf); |
| 192 | |
| 193 | inf->pid = 0; |
| 194 | inf->fake_pid_p = false; |
| 195 | inf->priv = NULL; |
| 196 | |
| 197 | if (inf->vfork_parent != NULL) |
| 198 | { |
| 199 | inf->vfork_parent->vfork_child = NULL; |
| 200 | inf->vfork_parent = NULL; |
| 201 | } |
| 202 | if (inf->vfork_child != NULL) |
| 203 | { |
| 204 | inf->vfork_child->vfork_parent = NULL; |
| 205 | inf->vfork_child = NULL; |
| 206 | } |
| 207 | |
| 208 | inf->pending_detach = 0; |
| 209 | /* Reset it. */ |
| 210 | inf->control = inferior_control_state (NO_STOP_QUIETLY); |
| 211 | |
| 212 | /* Clear the register cache and the frame cache. */ |
| 213 | registers_changed (); |
| 214 | reinit_frame_cache (); |
| 215 | } |
| 216 | |
| 217 | void |
| 218 | exit_inferior (inferior *inf) |
| 219 | { |
| 220 | exit_inferior_1 (inf, 0); |
| 221 | } |
| 222 | |
| 223 | void |
| 224 | exit_inferior_silent (int pid) |
| 225 | { |
| 226 | struct inferior *inf = find_inferior_pid (pid); |
| 227 | |
| 228 | exit_inferior_1 (inf, 1); |
| 229 | } |
| 230 | |
| 231 | void |
| 232 | exit_inferior_silent (inferior *inf) |
| 233 | { |
| 234 | exit_inferior_1 (inf, 1); |
| 235 | } |
| 236 | |
| 237 | /* See inferior.h. */ |
| 238 | |
| 239 | void |
| 240 | detach_inferior (inferior *inf) |
| 241 | { |
| 242 | /* Save the pid, since exit_inferior_1 will reset it. */ |
| 243 | int pid = inf->pid; |
| 244 | |
| 245 | exit_inferior_1 (inf, 0); |
| 246 | |
| 247 | if (print_inferior_events) |
| 248 | printf_unfiltered (_("[Inferior %d (%s) detached]\n"), |
| 249 | inf->num, |
| 250 | target_pid_to_str (ptid_t (pid)).c_str ()); |
| 251 | } |
| 252 | |
| 253 | void |
| 254 | inferior_appeared (struct inferior *inf, int pid) |
| 255 | { |
| 256 | /* If this is the first inferior with threads, reset the global |
| 257 | thread id. */ |
| 258 | if (!any_thread_p ()) |
| 259 | init_thread_list (); |
| 260 | |
| 261 | inf->pid = pid; |
| 262 | inf->has_exit_code = 0; |
| 263 | inf->exit_code = 0; |
| 264 | |
| 265 | gdb::observers::inferior_appeared.notify (inf); |
| 266 | } |
| 267 | |
| 268 | void |
| 269 | discard_all_inferiors (void) |
| 270 | { |
| 271 | for (inferior *inf : all_non_exited_inferiors ()) |
| 272 | exit_inferior_silent (inf); |
| 273 | } |
| 274 | |
| 275 | struct inferior * |
| 276 | find_inferior_id (int num) |
| 277 | { |
| 278 | for (inferior *inf : all_inferiors ()) |
| 279 | if (inf->num == num) |
| 280 | return inf; |
| 281 | |
| 282 | return NULL; |
| 283 | } |
| 284 | |
| 285 | struct inferior * |
| 286 | find_inferior_pid (int pid) |
| 287 | { |
| 288 | /* Looking for inferior pid == 0 is always wrong, and indicative of |
| 289 | a bug somewhere else. There may be more than one with pid == 0, |
| 290 | for instance. */ |
| 291 | gdb_assert (pid != 0); |
| 292 | |
| 293 | for (inferior *inf : all_inferiors ()) |
| 294 | if (inf->pid == pid) |
| 295 | return inf; |
| 296 | |
| 297 | return NULL; |
| 298 | } |
| 299 | |
| 300 | /* See inferior.h */ |
| 301 | |
| 302 | struct inferior * |
| 303 | find_inferior_ptid (ptid_t ptid) |
| 304 | { |
| 305 | return find_inferior_pid (ptid.pid ()); |
| 306 | } |
| 307 | |
| 308 | /* See inferior.h. */ |
| 309 | |
| 310 | struct inferior * |
| 311 | find_inferior_for_program_space (struct program_space *pspace) |
| 312 | { |
| 313 | struct inferior *cur_inf = current_inferior (); |
| 314 | |
| 315 | if (cur_inf->pspace == pspace) |
| 316 | return cur_inf; |
| 317 | |
| 318 | for (inferior *inf : all_inferiors ()) |
| 319 | if (inf->pspace == pspace) |
| 320 | return inf; |
| 321 | |
| 322 | return NULL; |
| 323 | } |
| 324 | |
| 325 | struct inferior * |
| 326 | iterate_over_inferiors (int (*callback) (struct inferior *, void *), |
| 327 | void *data) |
| 328 | { |
| 329 | for (inferior *inf : all_inferiors_safe ()) |
| 330 | if ((*callback) (inf, data)) |
| 331 | return inf; |
| 332 | |
| 333 | return NULL; |
| 334 | } |
| 335 | |
| 336 | int |
| 337 | have_inferiors (void) |
| 338 | { |
| 339 | for (inferior *inf ATTRIBUTE_UNUSED : all_non_exited_inferiors ()) |
| 340 | return 1; |
| 341 | |
| 342 | return 0; |
| 343 | } |
| 344 | |
| 345 | /* Return the number of live inferiors. We account for the case |
| 346 | where an inferior might have a non-zero pid but no threads, as |
| 347 | in the middle of a 'mourn' operation. */ |
| 348 | |
| 349 | int |
| 350 | number_of_live_inferiors (void) |
| 351 | { |
| 352 | int num_inf = 0; |
| 353 | |
| 354 | for (inferior *inf : all_non_exited_inferiors ()) |
| 355 | if (target_has_execution_1 (ptid_t (inf->pid))) |
| 356 | for (thread_info *tp ATTRIBUTE_UNUSED : inf->non_exited_threads ()) |
| 357 | { |
| 358 | /* Found a live thread in this inferior, go to the next |
| 359 | inferior. */ |
| 360 | ++num_inf; |
| 361 | break; |
| 362 | } |
| 363 | |
| 364 | return num_inf; |
| 365 | } |
| 366 | |
| 367 | /* Return true if there is at least one live inferior. */ |
| 368 | |
| 369 | int |
| 370 | have_live_inferiors (void) |
| 371 | { |
| 372 | return number_of_live_inferiors () > 0; |
| 373 | } |
| 374 | |
| 375 | /* Prune away any unused inferiors, and then prune away no longer used |
| 376 | program spaces. */ |
| 377 | |
| 378 | void |
| 379 | prune_inferiors (void) |
| 380 | { |
| 381 | struct inferior *ss, **ss_link; |
| 382 | |
| 383 | ss = inferior_list; |
| 384 | ss_link = &inferior_list; |
| 385 | while (ss) |
| 386 | { |
| 387 | if (!ss->deletable () |
| 388 | || !ss->removable |
| 389 | || ss->pid != 0) |
| 390 | { |
| 391 | ss_link = &ss->next; |
| 392 | ss = *ss_link; |
| 393 | continue; |
| 394 | } |
| 395 | |
| 396 | *ss_link = ss->next; |
| 397 | delete_inferior (ss); |
| 398 | ss = *ss_link; |
| 399 | } |
| 400 | } |
| 401 | |
| 402 | /* Simply returns the count of inferiors. */ |
| 403 | |
| 404 | int |
| 405 | number_of_inferiors (void) |
| 406 | { |
| 407 | auto rng = all_inferiors (); |
| 408 | return std::distance (rng.begin (), rng.end ()); |
| 409 | } |
| 410 | |
| 411 | /* Converts an inferior process id to a string. Like |
| 412 | target_pid_to_str, but special cases the null process. */ |
| 413 | |
| 414 | static std::string |
| 415 | inferior_pid_to_str (int pid) |
| 416 | { |
| 417 | if (pid != 0) |
| 418 | return target_pid_to_str (ptid_t (pid)); |
| 419 | else |
| 420 | return _("<null>"); |
| 421 | } |
| 422 | |
| 423 | /* See inferior.h. */ |
| 424 | |
| 425 | void |
| 426 | print_selected_inferior (struct ui_out *uiout) |
| 427 | { |
| 428 | struct inferior *inf = current_inferior (); |
| 429 | const char *filename = inf->pspace->pspace_exec_filename; |
| 430 | |
| 431 | if (filename == NULL) |
| 432 | filename = _("<noexec>"); |
| 433 | |
| 434 | uiout->message (_("[Switching to inferior %d [%s] (%s)]\n"), |
| 435 | inf->num, inferior_pid_to_str (inf->pid).c_str (), filename); |
| 436 | } |
| 437 | |
| 438 | /* Prints the list of inferiors and their details on UIOUT. This is a |
| 439 | version of 'info_inferior_command' suitable for use from MI. |
| 440 | |
| 441 | If REQUESTED_INFERIORS is not NULL, it's a list of GDB ids of the |
| 442 | inferiors that should be printed. Otherwise, all inferiors are |
| 443 | printed. */ |
| 444 | |
| 445 | static void |
| 446 | print_inferior (struct ui_out *uiout, const char *requested_inferiors) |
| 447 | { |
| 448 | int inf_count = 0; |
| 449 | |
| 450 | /* Compute number of inferiors we will print. */ |
| 451 | for (inferior *inf : all_inferiors ()) |
| 452 | { |
| 453 | if (!number_is_in_list (requested_inferiors, inf->num)) |
| 454 | continue; |
| 455 | |
| 456 | ++inf_count; |
| 457 | } |
| 458 | |
| 459 | if (inf_count == 0) |
| 460 | { |
| 461 | uiout->message ("No inferiors.\n"); |
| 462 | return; |
| 463 | } |
| 464 | |
| 465 | ui_out_emit_table table_emitter (uiout, 4, inf_count, "inferiors"); |
| 466 | uiout->table_header (1, ui_left, "current", ""); |
| 467 | uiout->table_header (4, ui_left, "number", "Num"); |
| 468 | uiout->table_header (17, ui_left, "target-id", "Description"); |
| 469 | uiout->table_header (17, ui_left, "exec", "Executable"); |
| 470 | |
| 471 | uiout->table_body (); |
| 472 | for (inferior *inf : all_inferiors ()) |
| 473 | { |
| 474 | if (!number_is_in_list (requested_inferiors, inf->num)) |
| 475 | continue; |
| 476 | |
| 477 | ui_out_emit_tuple tuple_emitter (uiout, NULL); |
| 478 | |
| 479 | if (inf == current_inferior ()) |
| 480 | uiout->field_string ("current", "*"); |
| 481 | else |
| 482 | uiout->field_skip ("current"); |
| 483 | |
| 484 | uiout->field_signed ("number", inf->num); |
| 485 | |
| 486 | uiout->field_string ("target-id", inferior_pid_to_str (inf->pid)); |
| 487 | |
| 488 | if (inf->pspace->pspace_exec_filename != NULL) |
| 489 | uiout->field_string ("exec", inf->pspace->pspace_exec_filename); |
| 490 | else |
| 491 | uiout->field_skip ("exec"); |
| 492 | |
| 493 | /* Print extra info that isn't really fit to always present in |
| 494 | tabular form. Currently we print the vfork parent/child |
| 495 | relationships, if any. */ |
| 496 | if (inf->vfork_parent) |
| 497 | { |
| 498 | uiout->text (_("\n\tis vfork child of inferior ")); |
| 499 | uiout->field_signed ("vfork-parent", inf->vfork_parent->num); |
| 500 | } |
| 501 | if (inf->vfork_child) |
| 502 | { |
| 503 | uiout->text (_("\n\tis vfork parent of inferior ")); |
| 504 | uiout->field_signed ("vfork-child", inf->vfork_child->num); |
| 505 | } |
| 506 | |
| 507 | uiout->text ("\n"); |
| 508 | } |
| 509 | } |
| 510 | |
| 511 | static void |
| 512 | detach_inferior_command (const char *args, int from_tty) |
| 513 | { |
| 514 | if (!args || !*args) |
| 515 | error (_("Requires argument (inferior id(s) to detach)")); |
| 516 | |
| 517 | number_or_range_parser parser (args); |
| 518 | while (!parser.finished ()) |
| 519 | { |
| 520 | int num = parser.get_number (); |
| 521 | |
| 522 | inferior *inf = find_inferior_id (num); |
| 523 | if (inf == NULL) |
| 524 | { |
| 525 | warning (_("Inferior ID %d not known."), num); |
| 526 | continue; |
| 527 | } |
| 528 | |
| 529 | if (inf->pid == 0) |
| 530 | { |
| 531 | warning (_("Inferior ID %d is not running."), num); |
| 532 | continue; |
| 533 | } |
| 534 | |
| 535 | thread_info *tp = any_thread_of_inferior (inf); |
| 536 | if (tp == NULL) |
| 537 | { |
| 538 | warning (_("Inferior ID %d has no threads."), num); |
| 539 | continue; |
| 540 | } |
| 541 | |
| 542 | switch_to_thread (tp); |
| 543 | |
| 544 | detach_command (NULL, from_tty); |
| 545 | } |
| 546 | } |
| 547 | |
| 548 | static void |
| 549 | kill_inferior_command (const char *args, int from_tty) |
| 550 | { |
| 551 | if (!args || !*args) |
| 552 | error (_("Requires argument (inferior id(s) to kill)")); |
| 553 | |
| 554 | number_or_range_parser parser (args); |
| 555 | while (!parser.finished ()) |
| 556 | { |
| 557 | int num = parser.get_number (); |
| 558 | |
| 559 | inferior *inf = find_inferior_id (num); |
| 560 | if (inf == NULL) |
| 561 | { |
| 562 | warning (_("Inferior ID %d not known."), num); |
| 563 | continue; |
| 564 | } |
| 565 | |
| 566 | if (inf->pid == 0) |
| 567 | { |
| 568 | warning (_("Inferior ID %d is not running."), num); |
| 569 | continue; |
| 570 | } |
| 571 | |
| 572 | thread_info *tp = any_thread_of_inferior (inf); |
| 573 | if (tp == NULL) |
| 574 | { |
| 575 | warning (_("Inferior ID %d has no threads."), num); |
| 576 | continue; |
| 577 | } |
| 578 | |
| 579 | switch_to_thread (tp); |
| 580 | |
| 581 | target_kill (); |
| 582 | } |
| 583 | |
| 584 | bfd_cache_close_all (); |
| 585 | } |
| 586 | |
| 587 | static void |
| 588 | inferior_command (const char *args, int from_tty) |
| 589 | { |
| 590 | struct inferior *inf; |
| 591 | int num; |
| 592 | |
| 593 | num = parse_and_eval_long (args); |
| 594 | |
| 595 | inf = find_inferior_id (num); |
| 596 | if (inf == NULL) |
| 597 | error (_("Inferior ID %d not known."), num); |
| 598 | |
| 599 | if (inf->pid != 0) |
| 600 | { |
| 601 | if (inf != current_inferior ()) |
| 602 | { |
| 603 | thread_info *tp = any_thread_of_inferior (inf); |
| 604 | if (tp == NULL) |
| 605 | error (_("Inferior has no threads.")); |
| 606 | |
| 607 | switch_to_thread (tp); |
| 608 | } |
| 609 | |
| 610 | gdb::observers::user_selected_context_changed.notify |
| 611 | (USER_SELECTED_INFERIOR |
| 612 | | USER_SELECTED_THREAD |
| 613 | | USER_SELECTED_FRAME); |
| 614 | } |
| 615 | else |
| 616 | { |
| 617 | set_current_inferior (inf); |
| 618 | switch_to_no_thread (); |
| 619 | set_current_program_space (inf->pspace); |
| 620 | |
| 621 | gdb::observers::user_selected_context_changed.notify |
| 622 | (USER_SELECTED_INFERIOR); |
| 623 | } |
| 624 | } |
| 625 | |
| 626 | /* Print information about currently known inferiors. */ |
| 627 | |
| 628 | static void |
| 629 | info_inferiors_command (const char *args, int from_tty) |
| 630 | { |
| 631 | print_inferior (current_uiout, args); |
| 632 | } |
| 633 | |
| 634 | /* remove-inferior ID */ |
| 635 | |
| 636 | static void |
| 637 | remove_inferior_command (const char *args, int from_tty) |
| 638 | { |
| 639 | if (args == NULL || *args == '\0') |
| 640 | error (_("Requires an argument (inferior id(s) to remove)")); |
| 641 | |
| 642 | number_or_range_parser parser (args); |
| 643 | while (!parser.finished ()) |
| 644 | { |
| 645 | int num = parser.get_number (); |
| 646 | struct inferior *inf = find_inferior_id (num); |
| 647 | |
| 648 | if (inf == NULL) |
| 649 | { |
| 650 | warning (_("Inferior ID %d not known."), num); |
| 651 | continue; |
| 652 | } |
| 653 | |
| 654 | if (!inf->deletable ()) |
| 655 | { |
| 656 | warning (_("Can not remove current inferior %d."), num); |
| 657 | continue; |
| 658 | } |
| 659 | |
| 660 | if (inf->pid != 0) |
| 661 | { |
| 662 | warning (_("Can not remove active inferior %d."), num); |
| 663 | continue; |
| 664 | } |
| 665 | |
| 666 | delete_inferior (inf); |
| 667 | } |
| 668 | } |
| 669 | |
| 670 | struct inferior * |
| 671 | add_inferior_with_spaces (void) |
| 672 | { |
| 673 | struct address_space *aspace; |
| 674 | struct program_space *pspace; |
| 675 | struct inferior *inf; |
| 676 | struct gdbarch_info info; |
| 677 | |
| 678 | /* If all inferiors share an address space on this system, this |
| 679 | doesn't really return a new address space; otherwise, it |
| 680 | really does. */ |
| 681 | aspace = maybe_new_address_space (); |
| 682 | pspace = new program_space (aspace); |
| 683 | inf = add_inferior (0); |
| 684 | inf->pspace = pspace; |
| 685 | inf->aspace = pspace->aspace; |
| 686 | |
| 687 | /* Setup the inferior's initial arch, based on information obtained |
| 688 | from the global "set ..." options. */ |
| 689 | gdbarch_info_init (&info); |
| 690 | inf->gdbarch = gdbarch_find_by_info (info); |
| 691 | /* The "set ..." options reject invalid settings, so we should |
| 692 | always have a valid arch by now. */ |
| 693 | gdb_assert (inf->gdbarch != NULL); |
| 694 | |
| 695 | return inf; |
| 696 | } |
| 697 | |
| 698 | /* add-inferior [-copies N] [-exec FILENAME] */ |
| 699 | |
| 700 | static void |
| 701 | add_inferior_command (const char *args, int from_tty) |
| 702 | { |
| 703 | int i, copies = 1; |
| 704 | gdb::unique_xmalloc_ptr<char> exec; |
| 705 | symfile_add_flags add_flags = 0; |
| 706 | |
| 707 | if (from_tty) |
| 708 | add_flags |= SYMFILE_VERBOSE; |
| 709 | |
| 710 | if (args) |
| 711 | { |
| 712 | gdb_argv built_argv (args); |
| 713 | |
| 714 | for (char **argv = built_argv.get (); *argv != NULL; argv++) |
| 715 | { |
| 716 | if (**argv == '-') |
| 717 | { |
| 718 | if (strcmp (*argv, "-copies") == 0) |
| 719 | { |
| 720 | ++argv; |
| 721 | if (!*argv) |
| 722 | error (_("No argument to -copies")); |
| 723 | copies = parse_and_eval_long (*argv); |
| 724 | } |
| 725 | else if (strcmp (*argv, "-exec") == 0) |
| 726 | { |
| 727 | ++argv; |
| 728 | if (!*argv) |
| 729 | error (_("No argument to -exec")); |
| 730 | exec.reset (tilde_expand (*argv)); |
| 731 | } |
| 732 | } |
| 733 | else |
| 734 | error (_("Invalid argument")); |
| 735 | } |
| 736 | } |
| 737 | |
| 738 | scoped_restore_current_pspace_and_thread restore_pspace_thread; |
| 739 | |
| 740 | for (i = 0; i < copies; ++i) |
| 741 | { |
| 742 | struct inferior *inf = add_inferior_with_spaces (); |
| 743 | |
| 744 | printf_filtered (_("Added inferior %d\n"), inf->num); |
| 745 | |
| 746 | if (exec != NULL) |
| 747 | { |
| 748 | /* Switch over temporarily, while reading executable and |
| 749 | symbols.q. */ |
| 750 | set_current_program_space (inf->pspace); |
| 751 | set_current_inferior (inf); |
| 752 | switch_to_no_thread (); |
| 753 | |
| 754 | exec_file_attach (exec.get (), from_tty); |
| 755 | symbol_file_add_main (exec.get (), add_flags); |
| 756 | } |
| 757 | } |
| 758 | } |
| 759 | |
| 760 | /* clone-inferior [-copies N] [ID] */ |
| 761 | |
| 762 | static void |
| 763 | clone_inferior_command (const char *args, int from_tty) |
| 764 | { |
| 765 | int i, copies = 1; |
| 766 | struct inferior *orginf = NULL; |
| 767 | |
| 768 | if (args) |
| 769 | { |
| 770 | gdb_argv built_argv (args); |
| 771 | |
| 772 | char **argv = built_argv.get (); |
| 773 | for (; *argv != NULL; argv++) |
| 774 | { |
| 775 | if (**argv == '-') |
| 776 | { |
| 777 | if (strcmp (*argv, "-copies") == 0) |
| 778 | { |
| 779 | ++argv; |
| 780 | if (!*argv) |
| 781 | error (_("No argument to -copies")); |
| 782 | copies = parse_and_eval_long (*argv); |
| 783 | |
| 784 | if (copies < 0) |
| 785 | error (_("Invalid copies number")); |
| 786 | } |
| 787 | } |
| 788 | else |
| 789 | { |
| 790 | if (orginf == NULL) |
| 791 | { |
| 792 | int num; |
| 793 | |
| 794 | /* The first non-option (-) argument specified the |
| 795 | program space ID. */ |
| 796 | num = parse_and_eval_long (*argv); |
| 797 | orginf = find_inferior_id (num); |
| 798 | |
| 799 | if (orginf == NULL) |
| 800 | error (_("Inferior ID %d not known."), num); |
| 801 | continue; |
| 802 | } |
| 803 | else |
| 804 | error (_("Invalid argument")); |
| 805 | } |
| 806 | } |
| 807 | } |
| 808 | |
| 809 | /* If no inferior id was specified, then the user wants to clone the |
| 810 | current inferior. */ |
| 811 | if (orginf == NULL) |
| 812 | orginf = current_inferior (); |
| 813 | |
| 814 | scoped_restore_current_pspace_and_thread restore_pspace_thread; |
| 815 | |
| 816 | for (i = 0; i < copies; ++i) |
| 817 | { |
| 818 | struct address_space *aspace; |
| 819 | struct program_space *pspace; |
| 820 | struct inferior *inf; |
| 821 | |
| 822 | /* If all inferiors share an address space on this system, this |
| 823 | doesn't really return a new address space; otherwise, it |
| 824 | really does. */ |
| 825 | aspace = maybe_new_address_space (); |
| 826 | pspace = new program_space (aspace); |
| 827 | inf = add_inferior (0); |
| 828 | inf->pspace = pspace; |
| 829 | inf->aspace = pspace->aspace; |
| 830 | inf->gdbarch = orginf->gdbarch; |
| 831 | |
| 832 | /* If the original inferior had a user specified target |
| 833 | description, make the clone use it too. */ |
| 834 | if (target_desc_info_from_user_p (inf->tdesc_info)) |
| 835 | copy_inferior_target_desc_info (inf, orginf); |
| 836 | |
| 837 | printf_filtered (_("Added inferior %d.\n"), inf->num); |
| 838 | |
| 839 | set_current_inferior (inf); |
| 840 | switch_to_no_thread (); |
| 841 | clone_program_space (pspace, orginf->pspace); |
| 842 | } |
| 843 | } |
| 844 | |
| 845 | /* Print notices when new inferiors are created and die. */ |
| 846 | static void |
| 847 | show_print_inferior_events (struct ui_file *file, int from_tty, |
| 848 | struct cmd_list_element *c, const char *value) |
| 849 | { |
| 850 | fprintf_filtered (file, _("Printing of inferior events is %s.\n"), value); |
| 851 | } |
| 852 | |
| 853 | /* Return a new value for the selected inferior's id. */ |
| 854 | |
| 855 | static struct value * |
| 856 | inferior_id_make_value (struct gdbarch *gdbarch, struct internalvar *var, |
| 857 | void *ignore) |
| 858 | { |
| 859 | struct inferior *inf = current_inferior (); |
| 860 | |
| 861 | return value_from_longest (builtin_type (gdbarch)->builtin_int, inf->num); |
| 862 | } |
| 863 | |
| 864 | /* Implementation of `$_inferior' variable. */ |
| 865 | |
| 866 | static const struct internalvar_funcs inferior_funcs = |
| 867 | { |
| 868 | inferior_id_make_value, |
| 869 | NULL, |
| 870 | NULL |
| 871 | }; |
| 872 | |
| 873 | \f |
| 874 | |
| 875 | void |
| 876 | initialize_inferiors (void) |
| 877 | { |
| 878 | struct cmd_list_element *c = NULL; |
| 879 | |
| 880 | /* There's always one inferior. Note that this function isn't an |
| 881 | automatic _initialize_foo function, since other _initialize_foo |
| 882 | routines may need to install their per-inferior data keys. We |
| 883 | can only allocate an inferior when all those modules have done |
| 884 | that. Do this after initialize_progspace, due to the |
| 885 | current_program_space reference. */ |
| 886 | current_inferior_ = add_inferior_silent (0); |
| 887 | current_inferior_->incref (); |
| 888 | current_inferior_->pspace = current_program_space; |
| 889 | current_inferior_->aspace = current_program_space->aspace; |
| 890 | /* The architecture will be initialized shortly, by |
| 891 | initialize_current_architecture. */ |
| 892 | |
| 893 | add_info ("inferiors", info_inferiors_command, |
| 894 | _("Print a list of inferiors being managed.\n\ |
| 895 | Usage: info inferiors [ID]...\n\ |
| 896 | If IDs are specified, the list is limited to just those inferiors.\n\ |
| 897 | By default all inferiors are displayed.")); |
| 898 | |
| 899 | c = add_com ("add-inferior", no_class, add_inferior_command, _("\ |
| 900 | Add a new inferior.\n\ |
| 901 | Usage: add-inferior [-copies N] [-exec FILENAME]\n\ |
| 902 | N is the optional number of inferiors to add, default is 1.\n\ |
| 903 | FILENAME is the file name of the executable to use\n\ |
| 904 | as main program.")); |
| 905 | set_cmd_completer (c, filename_completer); |
| 906 | |
| 907 | add_com ("remove-inferiors", no_class, remove_inferior_command, _("\ |
| 908 | Remove inferior ID (or list of IDs).\n\ |
| 909 | Usage: remove-inferiors ID...")); |
| 910 | |
| 911 | add_com ("clone-inferior", no_class, clone_inferior_command, _("\ |
| 912 | Clone inferior ID.\n\ |
| 913 | Usage: clone-inferior [-copies N] [ID]\n\ |
| 914 | Add N copies of inferior ID. The new inferior has the same\n\ |
| 915 | executable loaded as the copied inferior. If -copies is not specified,\n\ |
| 916 | adds 1 copy. If ID is not specified, it is the current inferior\n\ |
| 917 | that is cloned.")); |
| 918 | |
| 919 | add_cmd ("inferiors", class_run, detach_inferior_command, _("\ |
| 920 | Detach from inferior ID (or list of IDS).\n\ |
| 921 | Usage; detach inferiors ID..."), |
| 922 | &detachlist); |
| 923 | |
| 924 | add_cmd ("inferiors", class_run, kill_inferior_command, _("\ |
| 925 | Kill inferior ID (or list of IDs).\n\ |
| 926 | Usage: kill inferiors ID..."), |
| 927 | &killlist); |
| 928 | |
| 929 | add_cmd ("inferior", class_run, inferior_command, _("\ |
| 930 | Use this command to switch between inferiors.\n\ |
| 931 | Usage: inferior ID\n\ |
| 932 | The new inferior ID must be currently known."), |
| 933 | &cmdlist); |
| 934 | |
| 935 | add_setshow_boolean_cmd ("inferior-events", no_class, |
| 936 | &print_inferior_events, _("\ |
| 937 | Set printing of inferior events (such as inferior start and exit)."), _("\ |
| 938 | Show printing of inferior events (such as inferior start and exit)."), NULL, |
| 939 | NULL, |
| 940 | show_print_inferior_events, |
| 941 | &setprintlist, &showprintlist); |
| 942 | |
| 943 | create_internalvar_type_lazy ("_inferior", &inferior_funcs, NULL); |
| 944 | } |