| 1 | /* Multi-process/thread control for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 1986-2015 Free Software Foundation, Inc. |
| 4 | |
| 5 | Contributed by Lynx Real-Time Systems, Inc. Los Gatos, CA. |
| 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 | #include "defs.h" |
| 23 | #include "symtab.h" |
| 24 | #include "frame.h" |
| 25 | #include "inferior.h" |
| 26 | #include "environ.h" |
| 27 | #include "value.h" |
| 28 | #include "target.h" |
| 29 | #include "gdbthread.h" |
| 30 | #include "command.h" |
| 31 | #include "gdbcmd.h" |
| 32 | #include "regcache.h" |
| 33 | #include "gdb.h" |
| 34 | #include "btrace.h" |
| 35 | |
| 36 | #include <ctype.h> |
| 37 | #include <sys/types.h> |
| 38 | #include <signal.h> |
| 39 | #include "ui-out.h" |
| 40 | #include "observer.h" |
| 41 | #include "annotate.h" |
| 42 | #include "cli/cli-decode.h" |
| 43 | #include "gdb_regex.h" |
| 44 | #include "cli/cli-utils.h" |
| 45 | #include "thread-fsm.h" |
| 46 | |
| 47 | /* Definition of struct thread_info exported to gdbthread.h. */ |
| 48 | |
| 49 | /* Prototypes for exported functions. */ |
| 50 | |
| 51 | void _initialize_thread (void); |
| 52 | |
| 53 | /* Prototypes for local functions. */ |
| 54 | |
| 55 | struct thread_info *thread_list = NULL; |
| 56 | static int highest_thread_num; |
| 57 | |
| 58 | /* True if any thread is, or may be executing. We need to track this |
| 59 | separately because until we fully sync the thread list, we won't |
| 60 | know whether the target is fully stopped, even if we see stop |
| 61 | events for all known threads, because any of those threads may have |
| 62 | spawned new threads we haven't heard of yet. */ |
| 63 | static int threads_executing; |
| 64 | |
| 65 | static void thread_apply_all_command (char *, int); |
| 66 | static int thread_alive (struct thread_info *); |
| 67 | static void info_threads_command (char *, int); |
| 68 | static void thread_apply_command (char *, int); |
| 69 | static void restore_current_thread (ptid_t); |
| 70 | |
| 71 | /* Data to cleanup thread array. */ |
| 72 | |
| 73 | struct thread_array_cleanup |
| 74 | { |
| 75 | /* Array of thread pointers used to set |
| 76 | reference count. */ |
| 77 | struct thread_info **tp_array; |
| 78 | |
| 79 | /* Thread count in the array. */ |
| 80 | int count; |
| 81 | }; |
| 82 | |
| 83 | |
| 84 | struct thread_info* |
| 85 | inferior_thread (void) |
| 86 | { |
| 87 | struct thread_info *tp = find_thread_ptid (inferior_ptid); |
| 88 | gdb_assert (tp); |
| 89 | return tp; |
| 90 | } |
| 91 | |
| 92 | /* Delete the breakpoint pointed at by BP_P, if there's one. */ |
| 93 | |
| 94 | static void |
| 95 | delete_thread_breakpoint (struct breakpoint **bp_p) |
| 96 | { |
| 97 | if (*bp_p != NULL) |
| 98 | { |
| 99 | delete_breakpoint (*bp_p); |
| 100 | *bp_p = NULL; |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | void |
| 105 | delete_step_resume_breakpoint (struct thread_info *tp) |
| 106 | { |
| 107 | if (tp != NULL) |
| 108 | delete_thread_breakpoint (&tp->control.step_resume_breakpoint); |
| 109 | } |
| 110 | |
| 111 | void |
| 112 | delete_exception_resume_breakpoint (struct thread_info *tp) |
| 113 | { |
| 114 | if (tp != NULL) |
| 115 | delete_thread_breakpoint (&tp->control.exception_resume_breakpoint); |
| 116 | } |
| 117 | |
| 118 | /* See gdbthread.h. */ |
| 119 | |
| 120 | void |
| 121 | delete_single_step_breakpoints (struct thread_info *tp) |
| 122 | { |
| 123 | if (tp != NULL) |
| 124 | delete_thread_breakpoint (&tp->control.single_step_breakpoints); |
| 125 | } |
| 126 | |
| 127 | /* Delete the breakpoint pointed at by BP_P at the next stop, if |
| 128 | there's one. */ |
| 129 | |
| 130 | static void |
| 131 | delete_at_next_stop (struct breakpoint **bp) |
| 132 | { |
| 133 | if (*bp != NULL) |
| 134 | { |
| 135 | (*bp)->disposition = disp_del_at_next_stop; |
| 136 | *bp = NULL; |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | /* See gdbthread.h. */ |
| 141 | |
| 142 | int |
| 143 | thread_has_single_step_breakpoints_set (struct thread_info *tp) |
| 144 | { |
| 145 | return tp->control.single_step_breakpoints != NULL; |
| 146 | } |
| 147 | |
| 148 | /* See gdbthread.h. */ |
| 149 | |
| 150 | int |
| 151 | thread_has_single_step_breakpoint_here (struct thread_info *tp, |
| 152 | struct address_space *aspace, |
| 153 | CORE_ADDR addr) |
| 154 | { |
| 155 | struct breakpoint *ss_bps = tp->control.single_step_breakpoints; |
| 156 | |
| 157 | return (ss_bps != NULL |
| 158 | && breakpoint_has_location_inserted_here (ss_bps, aspace, addr)); |
| 159 | } |
| 160 | |
| 161 | /* See gdbthread.h. */ |
| 162 | |
| 163 | void |
| 164 | thread_cancel_execution_command (struct thread_info *thr) |
| 165 | { |
| 166 | if (thr->thread_fsm != NULL) |
| 167 | { |
| 168 | thread_fsm_clean_up (thr->thread_fsm); |
| 169 | thread_fsm_delete (thr->thread_fsm); |
| 170 | thr->thread_fsm = NULL; |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | static void |
| 175 | clear_thread_inferior_resources (struct thread_info *tp) |
| 176 | { |
| 177 | /* NOTE: this will take care of any left-over step_resume breakpoints, |
| 178 | but not any user-specified thread-specific breakpoints. We can not |
| 179 | delete the breakpoint straight-off, because the inferior might not |
| 180 | be stopped at the moment. */ |
| 181 | delete_at_next_stop (&tp->control.step_resume_breakpoint); |
| 182 | delete_at_next_stop (&tp->control.exception_resume_breakpoint); |
| 183 | delete_at_next_stop (&tp->control.single_step_breakpoints); |
| 184 | |
| 185 | delete_longjmp_breakpoint_at_next_stop (tp->num); |
| 186 | |
| 187 | bpstat_clear (&tp->control.stop_bpstat); |
| 188 | |
| 189 | btrace_teardown (tp); |
| 190 | |
| 191 | thread_cancel_execution_command (tp); |
| 192 | } |
| 193 | |
| 194 | static void |
| 195 | free_thread (struct thread_info *tp) |
| 196 | { |
| 197 | if (tp->priv) |
| 198 | { |
| 199 | if (tp->private_dtor) |
| 200 | tp->private_dtor (tp->priv); |
| 201 | else |
| 202 | xfree (tp->priv); |
| 203 | } |
| 204 | |
| 205 | xfree (tp->name); |
| 206 | xfree (tp); |
| 207 | } |
| 208 | |
| 209 | void |
| 210 | init_thread_list (void) |
| 211 | { |
| 212 | struct thread_info *tp, *tpnext; |
| 213 | |
| 214 | highest_thread_num = 0; |
| 215 | |
| 216 | if (!thread_list) |
| 217 | return; |
| 218 | |
| 219 | for (tp = thread_list; tp; tp = tpnext) |
| 220 | { |
| 221 | tpnext = tp->next; |
| 222 | free_thread (tp); |
| 223 | } |
| 224 | |
| 225 | thread_list = NULL; |
| 226 | threads_executing = 0; |
| 227 | } |
| 228 | |
| 229 | /* Allocate a new thread with target id PTID and add it to the thread |
| 230 | list. */ |
| 231 | |
| 232 | static struct thread_info * |
| 233 | new_thread (ptid_t ptid) |
| 234 | { |
| 235 | struct thread_info *tp = XCNEW (struct thread_info); |
| 236 | |
| 237 | tp->ptid = ptid; |
| 238 | tp->num = ++highest_thread_num; |
| 239 | tp->next = thread_list; |
| 240 | thread_list = tp; |
| 241 | |
| 242 | /* Nothing to follow yet. */ |
| 243 | tp->pending_follow.kind = TARGET_WAITKIND_SPURIOUS; |
| 244 | tp->state = THREAD_STOPPED; |
| 245 | tp->suspend.waitstatus.kind = TARGET_WAITKIND_IGNORE; |
| 246 | |
| 247 | return tp; |
| 248 | } |
| 249 | |
| 250 | struct thread_info * |
| 251 | add_thread_silent (ptid_t ptid) |
| 252 | { |
| 253 | struct thread_info *tp; |
| 254 | |
| 255 | tp = find_thread_ptid (ptid); |
| 256 | if (tp) |
| 257 | /* Found an old thread with the same id. It has to be dead, |
| 258 | otherwise we wouldn't be adding a new thread with the same id. |
| 259 | The OS is reusing this id --- delete it, and recreate a new |
| 260 | one. */ |
| 261 | { |
| 262 | /* In addition to deleting the thread, if this is the current |
| 263 | thread, then we need to take care that delete_thread doesn't |
| 264 | really delete the thread if it is inferior_ptid. Create a |
| 265 | new template thread in the list with an invalid ptid, switch |
| 266 | to it, delete the original thread, reset the new thread's |
| 267 | ptid, and switch to it. */ |
| 268 | |
| 269 | if (ptid_equal (inferior_ptid, ptid)) |
| 270 | { |
| 271 | tp = new_thread (null_ptid); |
| 272 | |
| 273 | /* Make switch_to_thread not read from the thread. */ |
| 274 | tp->state = THREAD_EXITED; |
| 275 | switch_to_thread (null_ptid); |
| 276 | |
| 277 | /* Now we can delete it. */ |
| 278 | delete_thread (ptid); |
| 279 | |
| 280 | /* Now reset its ptid, and reswitch inferior_ptid to it. */ |
| 281 | tp->ptid = ptid; |
| 282 | tp->state = THREAD_STOPPED; |
| 283 | switch_to_thread (ptid); |
| 284 | |
| 285 | observer_notify_new_thread (tp); |
| 286 | |
| 287 | /* All done. */ |
| 288 | return tp; |
| 289 | } |
| 290 | else |
| 291 | /* Just go ahead and delete it. */ |
| 292 | delete_thread (ptid); |
| 293 | } |
| 294 | |
| 295 | tp = new_thread (ptid); |
| 296 | observer_notify_new_thread (tp); |
| 297 | |
| 298 | return tp; |
| 299 | } |
| 300 | |
| 301 | struct thread_info * |
| 302 | add_thread_with_info (ptid_t ptid, struct private_thread_info *priv) |
| 303 | { |
| 304 | struct thread_info *result = add_thread_silent (ptid); |
| 305 | |
| 306 | result->priv = priv; |
| 307 | |
| 308 | if (print_thread_events) |
| 309 | printf_unfiltered (_("[New %s]\n"), target_pid_to_str (ptid)); |
| 310 | |
| 311 | annotate_new_thread (); |
| 312 | return result; |
| 313 | } |
| 314 | |
| 315 | struct thread_info * |
| 316 | add_thread (ptid_t ptid) |
| 317 | { |
| 318 | return add_thread_with_info (ptid, NULL); |
| 319 | } |
| 320 | |
| 321 | /* Add TP to the end of the step-over chain LIST_P. */ |
| 322 | |
| 323 | static void |
| 324 | step_over_chain_enqueue (struct thread_info **list_p, struct thread_info *tp) |
| 325 | { |
| 326 | gdb_assert (tp->step_over_next == NULL); |
| 327 | gdb_assert (tp->step_over_prev == NULL); |
| 328 | |
| 329 | if (*list_p == NULL) |
| 330 | { |
| 331 | *list_p = tp; |
| 332 | tp->step_over_prev = tp->step_over_next = tp; |
| 333 | } |
| 334 | else |
| 335 | { |
| 336 | struct thread_info *head = *list_p; |
| 337 | struct thread_info *tail = head->step_over_prev; |
| 338 | |
| 339 | tp->step_over_prev = tail; |
| 340 | tp->step_over_next = head; |
| 341 | head->step_over_prev = tp; |
| 342 | tail->step_over_next = tp; |
| 343 | } |
| 344 | } |
| 345 | |
| 346 | /* Remove TP from step-over chain LIST_P. */ |
| 347 | |
| 348 | static void |
| 349 | step_over_chain_remove (struct thread_info **list_p, struct thread_info *tp) |
| 350 | { |
| 351 | gdb_assert (tp->step_over_next != NULL); |
| 352 | gdb_assert (tp->step_over_prev != NULL); |
| 353 | |
| 354 | if (*list_p == tp) |
| 355 | { |
| 356 | if (tp == tp->step_over_next) |
| 357 | *list_p = NULL; |
| 358 | else |
| 359 | *list_p = tp->step_over_next; |
| 360 | } |
| 361 | |
| 362 | tp->step_over_prev->step_over_next = tp->step_over_next; |
| 363 | tp->step_over_next->step_over_prev = tp->step_over_prev; |
| 364 | tp->step_over_prev = tp->step_over_next = NULL; |
| 365 | } |
| 366 | |
| 367 | /* See gdbthread.h. */ |
| 368 | |
| 369 | struct thread_info * |
| 370 | thread_step_over_chain_next (struct thread_info *tp) |
| 371 | { |
| 372 | struct thread_info *next = tp->step_over_next; |
| 373 | |
| 374 | return (next == step_over_queue_head ? NULL : next); |
| 375 | } |
| 376 | |
| 377 | /* See gdbthread.h. */ |
| 378 | |
| 379 | int |
| 380 | thread_is_in_step_over_chain (struct thread_info *tp) |
| 381 | { |
| 382 | return (tp->step_over_next != NULL); |
| 383 | } |
| 384 | |
| 385 | /* See gdbthread.h. */ |
| 386 | |
| 387 | void |
| 388 | thread_step_over_chain_enqueue (struct thread_info *tp) |
| 389 | { |
| 390 | step_over_chain_enqueue (&step_over_queue_head, tp); |
| 391 | } |
| 392 | |
| 393 | /* See gdbthread.h. */ |
| 394 | |
| 395 | void |
| 396 | thread_step_over_chain_remove (struct thread_info *tp) |
| 397 | { |
| 398 | step_over_chain_remove (&step_over_queue_head, tp); |
| 399 | } |
| 400 | |
| 401 | /* Delete thread PTID. If SILENT, don't notify the observer of this |
| 402 | exit. */ |
| 403 | static void |
| 404 | delete_thread_1 (ptid_t ptid, int silent) |
| 405 | { |
| 406 | struct thread_info *tp, *tpprev; |
| 407 | |
| 408 | tpprev = NULL; |
| 409 | |
| 410 | for (tp = thread_list; tp; tpprev = tp, tp = tp->next) |
| 411 | if (ptid_equal (tp->ptid, ptid)) |
| 412 | break; |
| 413 | |
| 414 | if (!tp) |
| 415 | return; |
| 416 | |
| 417 | /* Dead threads don't need to step-over. Remove from queue. */ |
| 418 | if (tp->step_over_next != NULL) |
| 419 | thread_step_over_chain_remove (tp); |
| 420 | |
| 421 | /* If this is the current thread, or there's code out there that |
| 422 | relies on it existing (refcount > 0) we can't delete yet. Mark |
| 423 | it as exited, and notify it. */ |
| 424 | if (tp->refcount > 0 |
| 425 | || ptid_equal (tp->ptid, inferior_ptid)) |
| 426 | { |
| 427 | if (tp->state != THREAD_EXITED) |
| 428 | { |
| 429 | observer_notify_thread_exit (tp, silent); |
| 430 | |
| 431 | /* Tag it as exited. */ |
| 432 | tp->state = THREAD_EXITED; |
| 433 | |
| 434 | /* Clear breakpoints, etc. associated with this thread. */ |
| 435 | clear_thread_inferior_resources (tp); |
| 436 | } |
| 437 | |
| 438 | /* Will be really deleted some other time. */ |
| 439 | return; |
| 440 | } |
| 441 | |
| 442 | /* Notify thread exit, but only if we haven't already. */ |
| 443 | if (tp->state != THREAD_EXITED) |
| 444 | observer_notify_thread_exit (tp, silent); |
| 445 | |
| 446 | /* Tag it as exited. */ |
| 447 | tp->state = THREAD_EXITED; |
| 448 | clear_thread_inferior_resources (tp); |
| 449 | |
| 450 | if (tpprev) |
| 451 | tpprev->next = tp->next; |
| 452 | else |
| 453 | thread_list = tp->next; |
| 454 | |
| 455 | free_thread (tp); |
| 456 | } |
| 457 | |
| 458 | /* Delete thread PTID and notify of thread exit. If this is |
| 459 | inferior_ptid, don't actually delete it, but tag it as exited and |
| 460 | do the notification. If PTID is the user selected thread, clear |
| 461 | it. */ |
| 462 | void |
| 463 | delete_thread (ptid_t ptid) |
| 464 | { |
| 465 | delete_thread_1 (ptid, 0 /* not silent */); |
| 466 | } |
| 467 | |
| 468 | void |
| 469 | delete_thread_silent (ptid_t ptid) |
| 470 | { |
| 471 | delete_thread_1 (ptid, 1 /* silent */); |
| 472 | } |
| 473 | |
| 474 | struct thread_info * |
| 475 | find_thread_id (int num) |
| 476 | { |
| 477 | struct thread_info *tp; |
| 478 | |
| 479 | for (tp = thread_list; tp; tp = tp->next) |
| 480 | if (tp->num == num) |
| 481 | return tp; |
| 482 | |
| 483 | return NULL; |
| 484 | } |
| 485 | |
| 486 | /* Find a thread_info by matching PTID. */ |
| 487 | struct thread_info * |
| 488 | find_thread_ptid (ptid_t ptid) |
| 489 | { |
| 490 | struct thread_info *tp; |
| 491 | |
| 492 | for (tp = thread_list; tp; tp = tp->next) |
| 493 | if (ptid_equal (tp->ptid, ptid)) |
| 494 | return tp; |
| 495 | |
| 496 | return NULL; |
| 497 | } |
| 498 | |
| 499 | /* |
| 500 | * Thread iterator function. |
| 501 | * |
| 502 | * Calls a callback function once for each thread, so long as |
| 503 | * the callback function returns false. If the callback function |
| 504 | * returns true, the iteration will end and the current thread |
| 505 | * will be returned. This can be useful for implementing a |
| 506 | * search for a thread with arbitrary attributes, or for applying |
| 507 | * some operation to every thread. |
| 508 | * |
| 509 | * FIXME: some of the existing functionality, such as |
| 510 | * "Thread apply all", might be rewritten using this functionality. |
| 511 | */ |
| 512 | |
| 513 | struct thread_info * |
| 514 | iterate_over_threads (int (*callback) (struct thread_info *, void *), |
| 515 | void *data) |
| 516 | { |
| 517 | struct thread_info *tp, *next; |
| 518 | |
| 519 | for (tp = thread_list; tp; tp = next) |
| 520 | { |
| 521 | next = tp->next; |
| 522 | if ((*callback) (tp, data)) |
| 523 | return tp; |
| 524 | } |
| 525 | |
| 526 | return NULL; |
| 527 | } |
| 528 | |
| 529 | int |
| 530 | thread_count (void) |
| 531 | { |
| 532 | int result = 0; |
| 533 | struct thread_info *tp; |
| 534 | |
| 535 | for (tp = thread_list; tp; tp = tp->next) |
| 536 | ++result; |
| 537 | |
| 538 | return result; |
| 539 | } |
| 540 | |
| 541 | int |
| 542 | valid_thread_id (int num) |
| 543 | { |
| 544 | struct thread_info *tp; |
| 545 | |
| 546 | for (tp = thread_list; tp; tp = tp->next) |
| 547 | if (tp->num == num) |
| 548 | return 1; |
| 549 | |
| 550 | return 0; |
| 551 | } |
| 552 | |
| 553 | int |
| 554 | pid_to_thread_id (ptid_t ptid) |
| 555 | { |
| 556 | struct thread_info *tp; |
| 557 | |
| 558 | for (tp = thread_list; tp; tp = tp->next) |
| 559 | if (ptid_equal (tp->ptid, ptid)) |
| 560 | return tp->num; |
| 561 | |
| 562 | return 0; |
| 563 | } |
| 564 | |
| 565 | ptid_t |
| 566 | thread_id_to_pid (int num) |
| 567 | { |
| 568 | struct thread_info *thread = find_thread_id (num); |
| 569 | |
| 570 | if (thread) |
| 571 | return thread->ptid; |
| 572 | else |
| 573 | return pid_to_ptid (-1); |
| 574 | } |
| 575 | |
| 576 | int |
| 577 | in_thread_list (ptid_t ptid) |
| 578 | { |
| 579 | struct thread_info *tp; |
| 580 | |
| 581 | for (tp = thread_list; tp; tp = tp->next) |
| 582 | if (ptid_equal (tp->ptid, ptid)) |
| 583 | return 1; |
| 584 | |
| 585 | return 0; /* Never heard of 'im. */ |
| 586 | } |
| 587 | |
| 588 | /* Finds the first thread of the inferior given by PID. If PID is -1, |
| 589 | return the first thread in the list. */ |
| 590 | |
| 591 | struct thread_info * |
| 592 | first_thread_of_process (int pid) |
| 593 | { |
| 594 | struct thread_info *tp, *ret = NULL; |
| 595 | |
| 596 | for (tp = thread_list; tp; tp = tp->next) |
| 597 | if (pid == -1 || ptid_get_pid (tp->ptid) == pid) |
| 598 | if (ret == NULL || tp->num < ret->num) |
| 599 | ret = tp; |
| 600 | |
| 601 | return ret; |
| 602 | } |
| 603 | |
| 604 | struct thread_info * |
| 605 | any_thread_of_process (int pid) |
| 606 | { |
| 607 | struct thread_info *tp; |
| 608 | |
| 609 | gdb_assert (pid != 0); |
| 610 | |
| 611 | /* Prefer the current thread. */ |
| 612 | if (ptid_get_pid (inferior_ptid) == pid) |
| 613 | return inferior_thread (); |
| 614 | |
| 615 | ALL_NON_EXITED_THREADS (tp) |
| 616 | if (ptid_get_pid (tp->ptid) == pid) |
| 617 | return tp; |
| 618 | |
| 619 | return NULL; |
| 620 | } |
| 621 | |
| 622 | struct thread_info * |
| 623 | any_live_thread_of_process (int pid) |
| 624 | { |
| 625 | struct thread_info *curr_tp = NULL; |
| 626 | struct thread_info *tp; |
| 627 | struct thread_info *tp_executing = NULL; |
| 628 | |
| 629 | gdb_assert (pid != 0); |
| 630 | |
| 631 | /* Prefer the current thread if it's not executing. */ |
| 632 | if (ptid_get_pid (inferior_ptid) == pid) |
| 633 | { |
| 634 | /* If the current thread is dead, forget it. If it's not |
| 635 | executing, use it. Otherwise, still choose it (below), but |
| 636 | only if no other non-executing thread is found. */ |
| 637 | curr_tp = inferior_thread (); |
| 638 | if (curr_tp->state == THREAD_EXITED) |
| 639 | curr_tp = NULL; |
| 640 | else if (!curr_tp->executing) |
| 641 | return curr_tp; |
| 642 | } |
| 643 | |
| 644 | ALL_NON_EXITED_THREADS (tp) |
| 645 | if (ptid_get_pid (tp->ptid) == pid) |
| 646 | { |
| 647 | if (!tp->executing) |
| 648 | return tp; |
| 649 | |
| 650 | tp_executing = tp; |
| 651 | } |
| 652 | |
| 653 | /* If both the current thread and all live threads are executing, |
| 654 | prefer the current thread. */ |
| 655 | if (curr_tp != NULL) |
| 656 | return curr_tp; |
| 657 | |
| 658 | /* Otherwise, just return an executing thread, if any. */ |
| 659 | return tp_executing; |
| 660 | } |
| 661 | |
| 662 | /* Print a list of thread ids currently known, and the total number of |
| 663 | threads. To be used from within catch_errors. */ |
| 664 | static int |
| 665 | do_captured_list_thread_ids (struct ui_out *uiout, void *arg) |
| 666 | { |
| 667 | struct thread_info *tp; |
| 668 | int num = 0; |
| 669 | struct cleanup *cleanup_chain; |
| 670 | int current_thread = -1; |
| 671 | |
| 672 | update_thread_list (); |
| 673 | |
| 674 | cleanup_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "thread-ids"); |
| 675 | |
| 676 | for (tp = thread_list; tp; tp = tp->next) |
| 677 | { |
| 678 | if (tp->state == THREAD_EXITED) |
| 679 | continue; |
| 680 | |
| 681 | if (ptid_equal (tp->ptid, inferior_ptid)) |
| 682 | current_thread = tp->num; |
| 683 | |
| 684 | num++; |
| 685 | ui_out_field_int (uiout, "thread-id", tp->num); |
| 686 | } |
| 687 | |
| 688 | do_cleanups (cleanup_chain); |
| 689 | |
| 690 | if (current_thread != -1) |
| 691 | ui_out_field_int (uiout, "current-thread-id", current_thread); |
| 692 | ui_out_field_int (uiout, "number-of-threads", num); |
| 693 | return GDB_RC_OK; |
| 694 | } |
| 695 | |
| 696 | /* Official gdblib interface function to get a list of thread ids and |
| 697 | the total number. */ |
| 698 | enum gdb_rc |
| 699 | gdb_list_thread_ids (struct ui_out *uiout, char **error_message) |
| 700 | { |
| 701 | if (catch_exceptions_with_msg (uiout, do_captured_list_thread_ids, NULL, |
| 702 | error_message, RETURN_MASK_ALL) < 0) |
| 703 | return GDB_RC_FAIL; |
| 704 | return GDB_RC_OK; |
| 705 | } |
| 706 | |
| 707 | /* Return true if TP is an active thread. */ |
| 708 | static int |
| 709 | thread_alive (struct thread_info *tp) |
| 710 | { |
| 711 | if (tp->state == THREAD_EXITED) |
| 712 | return 0; |
| 713 | if (!target_thread_alive (tp->ptid)) |
| 714 | return 0; |
| 715 | return 1; |
| 716 | } |
| 717 | |
| 718 | /* See gdbthreads.h. */ |
| 719 | |
| 720 | void |
| 721 | prune_threads (void) |
| 722 | { |
| 723 | struct thread_info *tp, *tmp; |
| 724 | |
| 725 | ALL_THREADS_SAFE (tp, tmp) |
| 726 | { |
| 727 | if (!thread_alive (tp)) |
| 728 | delete_thread (tp->ptid); |
| 729 | } |
| 730 | } |
| 731 | |
| 732 | /* See gdbthreads.h. */ |
| 733 | |
| 734 | void |
| 735 | delete_exited_threads (void) |
| 736 | { |
| 737 | struct thread_info *tp, *tmp; |
| 738 | |
| 739 | ALL_THREADS_SAFE (tp, tmp) |
| 740 | { |
| 741 | if (tp->state == THREAD_EXITED) |
| 742 | delete_thread (tp->ptid); |
| 743 | } |
| 744 | } |
| 745 | |
| 746 | /* Disable storing stack temporaries for the thread whose id is |
| 747 | stored in DATA. */ |
| 748 | |
| 749 | static void |
| 750 | disable_thread_stack_temporaries (void *data) |
| 751 | { |
| 752 | ptid_t *pd = data; |
| 753 | struct thread_info *tp = find_thread_ptid (*pd); |
| 754 | |
| 755 | if (tp != NULL) |
| 756 | { |
| 757 | tp->stack_temporaries_enabled = 0; |
| 758 | VEC_free (value_ptr, tp->stack_temporaries); |
| 759 | } |
| 760 | |
| 761 | xfree (pd); |
| 762 | } |
| 763 | |
| 764 | /* Enable storing stack temporaries for thread with id PTID and return a |
| 765 | cleanup which can disable and clear the stack temporaries. */ |
| 766 | |
| 767 | struct cleanup * |
| 768 | enable_thread_stack_temporaries (ptid_t ptid) |
| 769 | { |
| 770 | struct thread_info *tp = find_thread_ptid (ptid); |
| 771 | ptid_t *data; |
| 772 | struct cleanup *c; |
| 773 | |
| 774 | gdb_assert (tp != NULL); |
| 775 | |
| 776 | tp->stack_temporaries_enabled = 1; |
| 777 | tp->stack_temporaries = NULL; |
| 778 | data = XNEW (ptid_t); |
| 779 | *data = ptid; |
| 780 | c = make_cleanup (disable_thread_stack_temporaries, data); |
| 781 | |
| 782 | return c; |
| 783 | } |
| 784 | |
| 785 | /* Return non-zero value if stack temporaies are enabled for the thread |
| 786 | with id PTID. */ |
| 787 | |
| 788 | int |
| 789 | thread_stack_temporaries_enabled_p (ptid_t ptid) |
| 790 | { |
| 791 | struct thread_info *tp = find_thread_ptid (ptid); |
| 792 | |
| 793 | if (tp == NULL) |
| 794 | return 0; |
| 795 | else |
| 796 | return tp->stack_temporaries_enabled; |
| 797 | } |
| 798 | |
| 799 | /* Push V on to the stack temporaries of the thread with id PTID. */ |
| 800 | |
| 801 | void |
| 802 | push_thread_stack_temporary (ptid_t ptid, struct value *v) |
| 803 | { |
| 804 | struct thread_info *tp = find_thread_ptid (ptid); |
| 805 | |
| 806 | gdb_assert (tp != NULL && tp->stack_temporaries_enabled); |
| 807 | VEC_safe_push (value_ptr, tp->stack_temporaries, v); |
| 808 | } |
| 809 | |
| 810 | /* Return 1 if VAL is among the stack temporaries of the thread |
| 811 | with id PTID. Return 0 otherwise. */ |
| 812 | |
| 813 | int |
| 814 | value_in_thread_stack_temporaries (struct value *val, ptid_t ptid) |
| 815 | { |
| 816 | struct thread_info *tp = find_thread_ptid (ptid); |
| 817 | |
| 818 | gdb_assert (tp != NULL && tp->stack_temporaries_enabled); |
| 819 | if (!VEC_empty (value_ptr, tp->stack_temporaries)) |
| 820 | { |
| 821 | struct value *v; |
| 822 | int i; |
| 823 | |
| 824 | for (i = 0; VEC_iterate (value_ptr, tp->stack_temporaries, i, v); i++) |
| 825 | if (v == val) |
| 826 | return 1; |
| 827 | } |
| 828 | |
| 829 | return 0; |
| 830 | } |
| 831 | |
| 832 | /* Return the last of the stack temporaries for thread with id PTID. |
| 833 | Return NULL if there are no stack temporaries for the thread. */ |
| 834 | |
| 835 | struct value * |
| 836 | get_last_thread_stack_temporary (ptid_t ptid) |
| 837 | { |
| 838 | struct value *lastval = NULL; |
| 839 | struct thread_info *tp = find_thread_ptid (ptid); |
| 840 | |
| 841 | gdb_assert (tp != NULL); |
| 842 | if (!VEC_empty (value_ptr, tp->stack_temporaries)) |
| 843 | lastval = VEC_last (value_ptr, tp->stack_temporaries); |
| 844 | |
| 845 | return lastval; |
| 846 | } |
| 847 | |
| 848 | void |
| 849 | thread_change_ptid (ptid_t old_ptid, ptid_t new_ptid) |
| 850 | { |
| 851 | struct inferior *inf; |
| 852 | struct thread_info *tp; |
| 853 | |
| 854 | /* It can happen that what we knew as the target inferior id |
| 855 | changes. E.g, target remote may only discover the remote process |
| 856 | pid after adding the inferior to GDB's list. */ |
| 857 | inf = find_inferior_ptid (old_ptid); |
| 858 | inf->pid = ptid_get_pid (new_ptid); |
| 859 | |
| 860 | tp = find_thread_ptid (old_ptid); |
| 861 | tp->ptid = new_ptid; |
| 862 | |
| 863 | observer_notify_thread_ptid_changed (old_ptid, new_ptid); |
| 864 | } |
| 865 | |
| 866 | /* See gdbthread.h. */ |
| 867 | |
| 868 | void |
| 869 | set_resumed (ptid_t ptid, int resumed) |
| 870 | { |
| 871 | struct thread_info *tp; |
| 872 | int all = ptid_equal (ptid, minus_one_ptid); |
| 873 | |
| 874 | if (all || ptid_is_pid (ptid)) |
| 875 | { |
| 876 | for (tp = thread_list; tp; tp = tp->next) |
| 877 | if (all || ptid_get_pid (tp->ptid) == ptid_get_pid (ptid)) |
| 878 | tp->resumed = resumed; |
| 879 | } |
| 880 | else |
| 881 | { |
| 882 | tp = find_thread_ptid (ptid); |
| 883 | gdb_assert (tp != NULL); |
| 884 | tp->resumed = resumed; |
| 885 | } |
| 886 | } |
| 887 | |
| 888 | /* Helper for set_running, that marks one thread either running or |
| 889 | stopped. */ |
| 890 | |
| 891 | static int |
| 892 | set_running_thread (struct thread_info *tp, int running) |
| 893 | { |
| 894 | int started = 0; |
| 895 | |
| 896 | if (running && tp->state == THREAD_STOPPED) |
| 897 | started = 1; |
| 898 | tp->state = running ? THREAD_RUNNING : THREAD_STOPPED; |
| 899 | |
| 900 | if (!running) |
| 901 | { |
| 902 | /* If the thread is now marked stopped, remove it from |
| 903 | the step-over queue, so that we don't try to resume |
| 904 | it until the user wants it to. */ |
| 905 | if (tp->step_over_next != NULL) |
| 906 | thread_step_over_chain_remove (tp); |
| 907 | } |
| 908 | |
| 909 | return started; |
| 910 | } |
| 911 | |
| 912 | void |
| 913 | set_running (ptid_t ptid, int running) |
| 914 | { |
| 915 | struct thread_info *tp; |
| 916 | int all = ptid_equal (ptid, minus_one_ptid); |
| 917 | int any_started = 0; |
| 918 | |
| 919 | /* We try not to notify the observer if no thread has actually changed |
| 920 | the running state -- merely to reduce the number of messages to |
| 921 | frontend. Frontend is supposed to handle multiple *running just fine. */ |
| 922 | if (all || ptid_is_pid (ptid)) |
| 923 | { |
| 924 | for (tp = thread_list; tp; tp = tp->next) |
| 925 | if (all || ptid_get_pid (tp->ptid) == ptid_get_pid (ptid)) |
| 926 | { |
| 927 | if (tp->state == THREAD_EXITED) |
| 928 | continue; |
| 929 | |
| 930 | if (set_running_thread (tp, running)) |
| 931 | any_started = 1; |
| 932 | } |
| 933 | } |
| 934 | else |
| 935 | { |
| 936 | tp = find_thread_ptid (ptid); |
| 937 | gdb_assert (tp != NULL); |
| 938 | gdb_assert (tp->state != THREAD_EXITED); |
| 939 | if (set_running_thread (tp, running)) |
| 940 | any_started = 1; |
| 941 | } |
| 942 | if (any_started) |
| 943 | observer_notify_target_resumed (ptid); |
| 944 | } |
| 945 | |
| 946 | static int |
| 947 | is_thread_state (ptid_t ptid, enum thread_state state) |
| 948 | { |
| 949 | struct thread_info *tp; |
| 950 | |
| 951 | tp = find_thread_ptid (ptid); |
| 952 | gdb_assert (tp); |
| 953 | return tp->state == state; |
| 954 | } |
| 955 | |
| 956 | int |
| 957 | is_stopped (ptid_t ptid) |
| 958 | { |
| 959 | return is_thread_state (ptid, THREAD_STOPPED); |
| 960 | } |
| 961 | |
| 962 | int |
| 963 | is_exited (ptid_t ptid) |
| 964 | { |
| 965 | return is_thread_state (ptid, THREAD_EXITED); |
| 966 | } |
| 967 | |
| 968 | int |
| 969 | is_running (ptid_t ptid) |
| 970 | { |
| 971 | return is_thread_state (ptid, THREAD_RUNNING); |
| 972 | } |
| 973 | |
| 974 | int |
| 975 | is_executing (ptid_t ptid) |
| 976 | { |
| 977 | struct thread_info *tp; |
| 978 | |
| 979 | tp = find_thread_ptid (ptid); |
| 980 | gdb_assert (tp); |
| 981 | return tp->executing; |
| 982 | } |
| 983 | |
| 984 | void |
| 985 | set_executing (ptid_t ptid, int executing) |
| 986 | { |
| 987 | struct thread_info *tp; |
| 988 | int all = ptid_equal (ptid, minus_one_ptid); |
| 989 | |
| 990 | if (all || ptid_is_pid (ptid)) |
| 991 | { |
| 992 | for (tp = thread_list; tp; tp = tp->next) |
| 993 | if (all || ptid_get_pid (tp->ptid) == ptid_get_pid (ptid)) |
| 994 | tp->executing = executing; |
| 995 | } |
| 996 | else |
| 997 | { |
| 998 | tp = find_thread_ptid (ptid); |
| 999 | gdb_assert (tp); |
| 1000 | tp->executing = executing; |
| 1001 | } |
| 1002 | |
| 1003 | /* It only takes one running thread to spawn more threads.*/ |
| 1004 | if (executing) |
| 1005 | threads_executing = 1; |
| 1006 | /* Only clear the flag if the caller is telling us everything is |
| 1007 | stopped. */ |
| 1008 | else if (ptid_equal (minus_one_ptid, ptid)) |
| 1009 | threads_executing = 0; |
| 1010 | } |
| 1011 | |
| 1012 | /* See gdbthread.h. */ |
| 1013 | |
| 1014 | int |
| 1015 | threads_are_executing (void) |
| 1016 | { |
| 1017 | return threads_executing; |
| 1018 | } |
| 1019 | |
| 1020 | void |
| 1021 | set_stop_requested (ptid_t ptid, int stop) |
| 1022 | { |
| 1023 | struct thread_info *tp; |
| 1024 | int all = ptid_equal (ptid, minus_one_ptid); |
| 1025 | |
| 1026 | if (all || ptid_is_pid (ptid)) |
| 1027 | { |
| 1028 | for (tp = thread_list; tp; tp = tp->next) |
| 1029 | if (all || ptid_get_pid (tp->ptid) == ptid_get_pid (ptid)) |
| 1030 | tp->stop_requested = stop; |
| 1031 | } |
| 1032 | else |
| 1033 | { |
| 1034 | tp = find_thread_ptid (ptid); |
| 1035 | gdb_assert (tp); |
| 1036 | tp->stop_requested = stop; |
| 1037 | } |
| 1038 | |
| 1039 | /* Call the stop requested observer so other components of GDB can |
| 1040 | react to this request. */ |
| 1041 | if (stop) |
| 1042 | observer_notify_thread_stop_requested (ptid); |
| 1043 | } |
| 1044 | |
| 1045 | void |
| 1046 | finish_thread_state (ptid_t ptid) |
| 1047 | { |
| 1048 | struct thread_info *tp; |
| 1049 | int all; |
| 1050 | int any_started = 0; |
| 1051 | |
| 1052 | all = ptid_equal (ptid, minus_one_ptid); |
| 1053 | |
| 1054 | if (all || ptid_is_pid (ptid)) |
| 1055 | { |
| 1056 | for (tp = thread_list; tp; tp = tp->next) |
| 1057 | { |
| 1058 | if (tp->state == THREAD_EXITED) |
| 1059 | continue; |
| 1060 | if (all || ptid_get_pid (ptid) == ptid_get_pid (tp->ptid)) |
| 1061 | { |
| 1062 | if (set_running_thread (tp, tp->executing)) |
| 1063 | any_started = 1; |
| 1064 | } |
| 1065 | } |
| 1066 | } |
| 1067 | else |
| 1068 | { |
| 1069 | tp = find_thread_ptid (ptid); |
| 1070 | gdb_assert (tp); |
| 1071 | if (tp->state != THREAD_EXITED) |
| 1072 | { |
| 1073 | if (set_running_thread (tp, tp->executing)) |
| 1074 | any_started = 1; |
| 1075 | } |
| 1076 | } |
| 1077 | |
| 1078 | if (any_started) |
| 1079 | observer_notify_target_resumed (ptid); |
| 1080 | } |
| 1081 | |
| 1082 | void |
| 1083 | finish_thread_state_cleanup (void *arg) |
| 1084 | { |
| 1085 | ptid_t *ptid_p = arg; |
| 1086 | |
| 1087 | gdb_assert (arg); |
| 1088 | |
| 1089 | finish_thread_state (*ptid_p); |
| 1090 | } |
| 1091 | |
| 1092 | int |
| 1093 | pc_in_thread_step_range (CORE_ADDR pc, struct thread_info *thread) |
| 1094 | { |
| 1095 | return (pc >= thread->control.step_range_start |
| 1096 | && pc < thread->control.step_range_end); |
| 1097 | } |
| 1098 | |
| 1099 | /* Prints the list of threads and their details on UIOUT. |
| 1100 | This is a version of 'info_threads_command' suitable for |
| 1101 | use from MI. |
| 1102 | If REQUESTED_THREAD is not -1, it's the GDB id of the thread |
| 1103 | that should be printed. Otherwise, all threads are |
| 1104 | printed. |
| 1105 | If PID is not -1, only print threads from the process PID. |
| 1106 | Otherwise, threads from all attached PIDs are printed. |
| 1107 | If both REQUESTED_THREAD and PID are not -1, then the thread |
| 1108 | is printed if it belongs to the specified process. Otherwise, |
| 1109 | an error is raised. */ |
| 1110 | void |
| 1111 | print_thread_info (struct ui_out *uiout, char *requested_threads, int pid) |
| 1112 | { |
| 1113 | struct thread_info *tp; |
| 1114 | ptid_t current_ptid; |
| 1115 | struct cleanup *old_chain; |
| 1116 | char *extra_info, *name, *target_id; |
| 1117 | int current_thread = -1; |
| 1118 | |
| 1119 | update_thread_list (); |
| 1120 | current_ptid = inferior_ptid; |
| 1121 | |
| 1122 | /* We'll be switching threads temporarily. */ |
| 1123 | old_chain = make_cleanup_restore_current_thread (); |
| 1124 | |
| 1125 | /* For backward compatibility, we make a list for MI. A table is |
| 1126 | preferable for the CLI, though, because it shows table |
| 1127 | headers. */ |
| 1128 | if (ui_out_is_mi_like_p (uiout)) |
| 1129 | make_cleanup_ui_out_list_begin_end (uiout, "threads"); |
| 1130 | else |
| 1131 | { |
| 1132 | int n_threads = 0; |
| 1133 | |
| 1134 | for (tp = thread_list; tp; tp = tp->next) |
| 1135 | { |
| 1136 | if (!number_is_in_list (requested_threads, tp->num)) |
| 1137 | continue; |
| 1138 | |
| 1139 | if (pid != -1 && ptid_get_pid (tp->ptid) != pid) |
| 1140 | continue; |
| 1141 | |
| 1142 | if (tp->state == THREAD_EXITED) |
| 1143 | continue; |
| 1144 | |
| 1145 | ++n_threads; |
| 1146 | } |
| 1147 | |
| 1148 | if (n_threads == 0) |
| 1149 | { |
| 1150 | if (requested_threads == NULL || *requested_threads == '\0') |
| 1151 | ui_out_message (uiout, 0, _("No threads.\n")); |
| 1152 | else |
| 1153 | ui_out_message (uiout, 0, _("No threads match '%s'.\n"), |
| 1154 | requested_threads); |
| 1155 | do_cleanups (old_chain); |
| 1156 | return; |
| 1157 | } |
| 1158 | |
| 1159 | make_cleanup_ui_out_table_begin_end (uiout, 4, n_threads, "threads"); |
| 1160 | |
| 1161 | ui_out_table_header (uiout, 1, ui_left, "current", ""); |
| 1162 | ui_out_table_header (uiout, 4, ui_left, "id", "Id"); |
| 1163 | ui_out_table_header (uiout, 17, ui_left, "target-id", "Target Id"); |
| 1164 | ui_out_table_header (uiout, 1, ui_left, "frame", "Frame"); |
| 1165 | ui_out_table_body (uiout); |
| 1166 | } |
| 1167 | |
| 1168 | for (tp = thread_list; tp; tp = tp->next) |
| 1169 | { |
| 1170 | struct cleanup *chain2; |
| 1171 | int core; |
| 1172 | |
| 1173 | if (!number_is_in_list (requested_threads, tp->num)) |
| 1174 | continue; |
| 1175 | |
| 1176 | if (pid != -1 && ptid_get_pid (tp->ptid) != pid) |
| 1177 | { |
| 1178 | if (requested_threads != NULL && *requested_threads != '\0') |
| 1179 | error (_("Requested thread not found in requested process")); |
| 1180 | continue; |
| 1181 | } |
| 1182 | |
| 1183 | if (ptid_equal (tp->ptid, current_ptid)) |
| 1184 | current_thread = tp->num; |
| 1185 | |
| 1186 | if (tp->state == THREAD_EXITED) |
| 1187 | continue; |
| 1188 | |
| 1189 | chain2 = make_cleanup_ui_out_tuple_begin_end (uiout, NULL); |
| 1190 | |
| 1191 | if (ui_out_is_mi_like_p (uiout)) |
| 1192 | { |
| 1193 | /* Compatibility. */ |
| 1194 | if (ptid_equal (tp->ptid, current_ptid)) |
| 1195 | ui_out_text (uiout, "* "); |
| 1196 | else |
| 1197 | ui_out_text (uiout, " "); |
| 1198 | } |
| 1199 | else |
| 1200 | { |
| 1201 | if (ptid_equal (tp->ptid, current_ptid)) |
| 1202 | ui_out_field_string (uiout, "current", "*"); |
| 1203 | else |
| 1204 | ui_out_field_skip (uiout, "current"); |
| 1205 | } |
| 1206 | |
| 1207 | ui_out_field_int (uiout, "id", tp->num); |
| 1208 | |
| 1209 | /* For the CLI, we stuff everything into the target-id field. |
| 1210 | This is a gross hack to make the output come out looking |
| 1211 | correct. The underlying problem here is that ui-out has no |
| 1212 | way to specify that a field's space allocation should be |
| 1213 | shared by several fields. For MI, we do the right thing |
| 1214 | instead. */ |
| 1215 | |
| 1216 | target_id = target_pid_to_str (tp->ptid); |
| 1217 | extra_info = target_extra_thread_info (tp); |
| 1218 | name = tp->name ? tp->name : target_thread_name (tp); |
| 1219 | |
| 1220 | if (ui_out_is_mi_like_p (uiout)) |
| 1221 | { |
| 1222 | ui_out_field_string (uiout, "target-id", target_id); |
| 1223 | if (extra_info) |
| 1224 | ui_out_field_string (uiout, "details", extra_info); |
| 1225 | if (name) |
| 1226 | ui_out_field_string (uiout, "name", name); |
| 1227 | } |
| 1228 | else |
| 1229 | { |
| 1230 | struct cleanup *str_cleanup; |
| 1231 | char *contents; |
| 1232 | |
| 1233 | if (extra_info && name) |
| 1234 | contents = xstrprintf ("%s \"%s\" (%s)", target_id, |
| 1235 | name, extra_info); |
| 1236 | else if (extra_info) |
| 1237 | contents = xstrprintf ("%s (%s)", target_id, extra_info); |
| 1238 | else if (name) |
| 1239 | contents = xstrprintf ("%s \"%s\"", target_id, name); |
| 1240 | else |
| 1241 | contents = xstrdup (target_id); |
| 1242 | str_cleanup = make_cleanup (xfree, contents); |
| 1243 | |
| 1244 | ui_out_field_string (uiout, "target-id", contents); |
| 1245 | do_cleanups (str_cleanup); |
| 1246 | } |
| 1247 | |
| 1248 | if (tp->state == THREAD_RUNNING) |
| 1249 | ui_out_text (uiout, "(running)\n"); |
| 1250 | else |
| 1251 | { |
| 1252 | /* The switch below puts us at the top of the stack (leaf |
| 1253 | frame). */ |
| 1254 | switch_to_thread (tp->ptid); |
| 1255 | print_stack_frame (get_selected_frame (NULL), |
| 1256 | /* For MI output, print frame level. */ |
| 1257 | ui_out_is_mi_like_p (uiout), |
| 1258 | LOCATION, 0); |
| 1259 | } |
| 1260 | |
| 1261 | if (ui_out_is_mi_like_p (uiout)) |
| 1262 | { |
| 1263 | char *state = "stopped"; |
| 1264 | |
| 1265 | if (tp->state == THREAD_RUNNING) |
| 1266 | state = "running"; |
| 1267 | ui_out_field_string (uiout, "state", state); |
| 1268 | } |
| 1269 | |
| 1270 | core = target_core_of_thread (tp->ptid); |
| 1271 | if (ui_out_is_mi_like_p (uiout) && core != -1) |
| 1272 | ui_out_field_int (uiout, "core", core); |
| 1273 | |
| 1274 | do_cleanups (chain2); |
| 1275 | } |
| 1276 | |
| 1277 | /* Restores the current thread and the frame selected before |
| 1278 | the "info threads" command. */ |
| 1279 | do_cleanups (old_chain); |
| 1280 | |
| 1281 | if (pid == -1 && requested_threads == NULL) |
| 1282 | { |
| 1283 | gdb_assert (current_thread != -1 |
| 1284 | || !thread_list |
| 1285 | || ptid_equal (inferior_ptid, null_ptid)); |
| 1286 | if (current_thread != -1 && ui_out_is_mi_like_p (uiout)) |
| 1287 | ui_out_field_int (uiout, "current-thread-id", current_thread); |
| 1288 | |
| 1289 | if (current_thread != -1 && is_exited (current_ptid)) |
| 1290 | ui_out_message (uiout, 0, "\n\ |
| 1291 | The current thread <Thread ID %d> has terminated. See `help thread'.\n", |
| 1292 | current_thread); |
| 1293 | else if (thread_list |
| 1294 | && current_thread == -1 |
| 1295 | && ptid_equal (current_ptid, null_ptid)) |
| 1296 | ui_out_message (uiout, 0, "\n\ |
| 1297 | No selected thread. See `help thread'.\n"); |
| 1298 | } |
| 1299 | } |
| 1300 | |
| 1301 | /* Print information about currently known threads |
| 1302 | |
| 1303 | Optional ARG is a thread id, or list of thread ids. |
| 1304 | |
| 1305 | Note: this has the drawback that it _really_ switches |
| 1306 | threads, which frees the frame cache. A no-side |
| 1307 | effects info-threads command would be nicer. */ |
| 1308 | |
| 1309 | static void |
| 1310 | info_threads_command (char *arg, int from_tty) |
| 1311 | { |
| 1312 | print_thread_info (current_uiout, arg, -1); |
| 1313 | } |
| 1314 | |
| 1315 | /* Switch from one thread to another. */ |
| 1316 | |
| 1317 | void |
| 1318 | switch_to_thread (ptid_t ptid) |
| 1319 | { |
| 1320 | /* Switch the program space as well, if we can infer it from the now |
| 1321 | current thread. Otherwise, it's up to the caller to select the |
| 1322 | space it wants. */ |
| 1323 | if (!ptid_equal (ptid, null_ptid)) |
| 1324 | { |
| 1325 | struct inferior *inf; |
| 1326 | |
| 1327 | inf = find_inferior_ptid (ptid); |
| 1328 | gdb_assert (inf != NULL); |
| 1329 | set_current_program_space (inf->pspace); |
| 1330 | set_current_inferior (inf); |
| 1331 | } |
| 1332 | |
| 1333 | if (ptid_equal (ptid, inferior_ptid)) |
| 1334 | return; |
| 1335 | |
| 1336 | inferior_ptid = ptid; |
| 1337 | reinit_frame_cache (); |
| 1338 | |
| 1339 | /* We don't check for is_stopped, because we're called at times |
| 1340 | while in the TARGET_RUNNING state, e.g., while handling an |
| 1341 | internal event. */ |
| 1342 | if (!ptid_equal (inferior_ptid, null_ptid) |
| 1343 | && !is_exited (ptid) |
| 1344 | && !is_executing (ptid)) |
| 1345 | stop_pc = regcache_read_pc (get_thread_regcache (ptid)); |
| 1346 | else |
| 1347 | stop_pc = ~(CORE_ADDR) 0; |
| 1348 | } |
| 1349 | |
| 1350 | static void |
| 1351 | restore_current_thread (ptid_t ptid) |
| 1352 | { |
| 1353 | switch_to_thread (ptid); |
| 1354 | } |
| 1355 | |
| 1356 | static void |
| 1357 | restore_selected_frame (struct frame_id a_frame_id, int frame_level) |
| 1358 | { |
| 1359 | struct frame_info *frame = NULL; |
| 1360 | int count; |
| 1361 | |
| 1362 | /* This means there was no selected frame. */ |
| 1363 | if (frame_level == -1) |
| 1364 | { |
| 1365 | select_frame (NULL); |
| 1366 | return; |
| 1367 | } |
| 1368 | |
| 1369 | gdb_assert (frame_level >= 0); |
| 1370 | |
| 1371 | /* Restore by level first, check if the frame id is the same as |
| 1372 | expected. If that fails, try restoring by frame id. If that |
| 1373 | fails, nothing to do, just warn the user. */ |
| 1374 | |
| 1375 | count = frame_level; |
| 1376 | frame = find_relative_frame (get_current_frame (), &count); |
| 1377 | if (count == 0 |
| 1378 | && frame != NULL |
| 1379 | /* The frame ids must match - either both valid or both outer_frame_id. |
| 1380 | The latter case is not failsafe, but since it's highly unlikely |
| 1381 | the search by level finds the wrong frame, it's 99.9(9)% of |
| 1382 | the time (for all practical purposes) safe. */ |
| 1383 | && frame_id_eq (get_frame_id (frame), a_frame_id)) |
| 1384 | { |
| 1385 | /* Cool, all is fine. */ |
| 1386 | select_frame (frame); |
| 1387 | return; |
| 1388 | } |
| 1389 | |
| 1390 | frame = frame_find_by_id (a_frame_id); |
| 1391 | if (frame != NULL) |
| 1392 | { |
| 1393 | /* Cool, refound it. */ |
| 1394 | select_frame (frame); |
| 1395 | return; |
| 1396 | } |
| 1397 | |
| 1398 | /* Nothing else to do, the frame layout really changed. Select the |
| 1399 | innermost stack frame. */ |
| 1400 | select_frame (get_current_frame ()); |
| 1401 | |
| 1402 | /* Warn the user. */ |
| 1403 | if (frame_level > 0 && !ui_out_is_mi_like_p (current_uiout)) |
| 1404 | { |
| 1405 | warning (_("Couldn't restore frame #%d in " |
| 1406 | "current thread. Bottom (innermost) frame selected:"), |
| 1407 | frame_level); |
| 1408 | /* For MI, we should probably have a notification about |
| 1409 | current frame change. But this error is not very |
| 1410 | likely, so don't bother for now. */ |
| 1411 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
| 1412 | } |
| 1413 | } |
| 1414 | |
| 1415 | /* Data used by the cleanup installed by |
| 1416 | 'make_cleanup_restore_current_thread'. */ |
| 1417 | |
| 1418 | struct current_thread_cleanup |
| 1419 | { |
| 1420 | /* Next in list of currently installed 'struct |
| 1421 | current_thread_cleanup' cleanups. See |
| 1422 | 'current_thread_cleanup_chain' below. */ |
| 1423 | struct current_thread_cleanup *next; |
| 1424 | |
| 1425 | ptid_t inferior_ptid; |
| 1426 | struct frame_id selected_frame_id; |
| 1427 | int selected_frame_level; |
| 1428 | int was_stopped; |
| 1429 | int inf_id; |
| 1430 | int was_removable; |
| 1431 | }; |
| 1432 | |
| 1433 | /* A chain of currently installed 'struct current_thread_cleanup' |
| 1434 | cleanups. Restoring the previously selected thread looks up the |
| 1435 | old thread in the thread list by ptid. If the thread changes ptid, |
| 1436 | we need to update the cleanup's thread structure so the look up |
| 1437 | succeeds. */ |
| 1438 | static struct current_thread_cleanup *current_thread_cleanup_chain; |
| 1439 | |
| 1440 | /* A thread_ptid_changed observer. Update all currently installed |
| 1441 | current_thread_cleanup cleanups that want to switch back to |
| 1442 | OLD_PTID to switch back to NEW_PTID instead. */ |
| 1443 | |
| 1444 | static void |
| 1445 | restore_current_thread_ptid_changed (ptid_t old_ptid, ptid_t new_ptid) |
| 1446 | { |
| 1447 | struct current_thread_cleanup *it; |
| 1448 | |
| 1449 | for (it = current_thread_cleanup_chain; it != NULL; it = it->next) |
| 1450 | { |
| 1451 | if (ptid_equal (it->inferior_ptid, old_ptid)) |
| 1452 | it->inferior_ptid = new_ptid; |
| 1453 | } |
| 1454 | } |
| 1455 | |
| 1456 | static void |
| 1457 | do_restore_current_thread_cleanup (void *arg) |
| 1458 | { |
| 1459 | struct thread_info *tp; |
| 1460 | struct current_thread_cleanup *old = arg; |
| 1461 | |
| 1462 | tp = find_thread_ptid (old->inferior_ptid); |
| 1463 | |
| 1464 | /* If the previously selected thread belonged to a process that has |
| 1465 | in the mean time been deleted (due to normal exit, detach, etc.), |
| 1466 | then don't revert back to it, but instead simply drop back to no |
| 1467 | thread selected. */ |
| 1468 | if (tp |
| 1469 | && find_inferior_ptid (tp->ptid) != NULL) |
| 1470 | restore_current_thread (old->inferior_ptid); |
| 1471 | else |
| 1472 | { |
| 1473 | restore_current_thread (null_ptid); |
| 1474 | set_current_inferior (find_inferior_id (old->inf_id)); |
| 1475 | } |
| 1476 | |
| 1477 | /* The running state of the originally selected thread may have |
| 1478 | changed, so we have to recheck it here. */ |
| 1479 | if (!ptid_equal (inferior_ptid, null_ptid) |
| 1480 | && old->was_stopped |
| 1481 | && is_stopped (inferior_ptid) |
| 1482 | && target_has_registers |
| 1483 | && target_has_stack |
| 1484 | && target_has_memory) |
| 1485 | restore_selected_frame (old->selected_frame_id, |
| 1486 | old->selected_frame_level); |
| 1487 | } |
| 1488 | |
| 1489 | static void |
| 1490 | restore_current_thread_cleanup_dtor (void *arg) |
| 1491 | { |
| 1492 | struct current_thread_cleanup *old = arg; |
| 1493 | struct thread_info *tp; |
| 1494 | struct inferior *inf; |
| 1495 | |
| 1496 | current_thread_cleanup_chain = current_thread_cleanup_chain->next; |
| 1497 | |
| 1498 | tp = find_thread_ptid (old->inferior_ptid); |
| 1499 | if (tp) |
| 1500 | tp->refcount--; |
| 1501 | inf = find_inferior_id (old->inf_id); |
| 1502 | if (inf != NULL) |
| 1503 | inf->removable = old->was_removable; |
| 1504 | xfree (old); |
| 1505 | } |
| 1506 | |
| 1507 | /* Set the thread reference count. */ |
| 1508 | |
| 1509 | static void |
| 1510 | set_thread_refcount (void *data) |
| 1511 | { |
| 1512 | int k; |
| 1513 | struct thread_array_cleanup *ta_cleanup = data; |
| 1514 | |
| 1515 | for (k = 0; k != ta_cleanup->count; k++) |
| 1516 | ta_cleanup->tp_array[k]->refcount--; |
| 1517 | } |
| 1518 | |
| 1519 | struct cleanup * |
| 1520 | make_cleanup_restore_current_thread (void) |
| 1521 | { |
| 1522 | struct thread_info *tp; |
| 1523 | struct frame_info *frame; |
| 1524 | struct current_thread_cleanup *old = XNEW (struct current_thread_cleanup); |
| 1525 | |
| 1526 | old->inferior_ptid = inferior_ptid; |
| 1527 | old->inf_id = current_inferior ()->num; |
| 1528 | old->was_removable = current_inferior ()->removable; |
| 1529 | |
| 1530 | old->next = current_thread_cleanup_chain; |
| 1531 | current_thread_cleanup_chain = old; |
| 1532 | |
| 1533 | if (!ptid_equal (inferior_ptid, null_ptid)) |
| 1534 | { |
| 1535 | old->was_stopped = is_stopped (inferior_ptid); |
| 1536 | if (old->was_stopped |
| 1537 | && target_has_registers |
| 1538 | && target_has_stack |
| 1539 | && target_has_memory) |
| 1540 | { |
| 1541 | /* When processing internal events, there might not be a |
| 1542 | selected frame. If we naively call get_selected_frame |
| 1543 | here, then we can end up reading debuginfo for the |
| 1544 | current frame, but we don't generally need the debuginfo |
| 1545 | at this point. */ |
| 1546 | frame = get_selected_frame_if_set (); |
| 1547 | } |
| 1548 | else |
| 1549 | frame = NULL; |
| 1550 | |
| 1551 | old->selected_frame_id = get_frame_id (frame); |
| 1552 | old->selected_frame_level = frame_relative_level (frame); |
| 1553 | |
| 1554 | tp = find_thread_ptid (inferior_ptid); |
| 1555 | if (tp) |
| 1556 | tp->refcount++; |
| 1557 | } |
| 1558 | |
| 1559 | current_inferior ()->removable = 0; |
| 1560 | |
| 1561 | return make_cleanup_dtor (do_restore_current_thread_cleanup, old, |
| 1562 | restore_current_thread_cleanup_dtor); |
| 1563 | } |
| 1564 | |
| 1565 | /* If non-zero tp_array_compar should sort in ascending order, otherwise in |
| 1566 | descending order. */ |
| 1567 | |
| 1568 | static int tp_array_compar_ascending; |
| 1569 | |
| 1570 | /* Sort an array for struct thread_info pointers by their NUM, order is |
| 1571 | determined by TP_ARRAY_COMPAR_ASCENDING. */ |
| 1572 | |
| 1573 | static int |
| 1574 | tp_array_compar (const void *ap_voidp, const void *bp_voidp) |
| 1575 | { |
| 1576 | const struct thread_info *const *ap = ap_voidp; |
| 1577 | const struct thread_info *const *bp = bp_voidp; |
| 1578 | |
| 1579 | return ((((*ap)->num > (*bp)->num) - ((*ap)->num < (*bp)->num)) |
| 1580 | * (tp_array_compar_ascending ? +1 : -1)); |
| 1581 | } |
| 1582 | |
| 1583 | /* Apply a GDB command to a list of threads. List syntax is a whitespace |
| 1584 | seperated list of numbers, or ranges, or the keyword `all'. Ranges consist |
| 1585 | of two numbers seperated by a hyphen. Examples: |
| 1586 | |
| 1587 | thread apply 1 2 7 4 backtrace Apply backtrace cmd to threads 1,2,7,4 |
| 1588 | thread apply 2-7 9 p foo(1) Apply p foo(1) cmd to threads 2->7 & 9 |
| 1589 | thread apply all p x/i $pc Apply x/i $pc cmd to all threads. */ |
| 1590 | |
| 1591 | static void |
| 1592 | thread_apply_all_command (char *cmd, int from_tty) |
| 1593 | { |
| 1594 | struct cleanup *old_chain; |
| 1595 | char *saved_cmd; |
| 1596 | int tc; |
| 1597 | struct thread_array_cleanup ta_cleanup; |
| 1598 | |
| 1599 | tp_array_compar_ascending = 0; |
| 1600 | if (cmd != NULL |
| 1601 | && check_for_argument (&cmd, "-ascending", strlen ("-ascending"))) |
| 1602 | { |
| 1603 | cmd = skip_spaces (cmd); |
| 1604 | tp_array_compar_ascending = 1; |
| 1605 | } |
| 1606 | |
| 1607 | if (cmd == NULL || *cmd == '\000') |
| 1608 | error (_("Please specify a command following the thread ID list")); |
| 1609 | |
| 1610 | update_thread_list (); |
| 1611 | |
| 1612 | old_chain = make_cleanup_restore_current_thread (); |
| 1613 | |
| 1614 | /* Save a copy of the command in case it is clobbered by |
| 1615 | execute_command. */ |
| 1616 | saved_cmd = xstrdup (cmd); |
| 1617 | make_cleanup (xfree, saved_cmd); |
| 1618 | |
| 1619 | /* Note this includes exited threads. */ |
| 1620 | tc = thread_count (); |
| 1621 | if (tc != 0) |
| 1622 | { |
| 1623 | struct thread_info **tp_array; |
| 1624 | struct thread_info *tp; |
| 1625 | int i = 0, k; |
| 1626 | |
| 1627 | /* Save a copy of the thread_list in case we execute detach |
| 1628 | command. */ |
| 1629 | tp_array = XNEWVEC (struct thread_info *, tc); |
| 1630 | make_cleanup (xfree, tp_array); |
| 1631 | |
| 1632 | ALL_NON_EXITED_THREADS (tp) |
| 1633 | { |
| 1634 | tp_array[i] = tp; |
| 1635 | tp->refcount++; |
| 1636 | i++; |
| 1637 | } |
| 1638 | /* Because we skipped exited threads, we may end up with fewer |
| 1639 | threads in the array than the total count of threads. */ |
| 1640 | gdb_assert (i <= tc); |
| 1641 | |
| 1642 | if (i != 0) |
| 1643 | qsort (tp_array, i, sizeof (*tp_array), tp_array_compar); |
| 1644 | |
| 1645 | ta_cleanup.tp_array = tp_array; |
| 1646 | ta_cleanup.count = i; |
| 1647 | make_cleanup (set_thread_refcount, &ta_cleanup); |
| 1648 | |
| 1649 | for (k = 0; k != i; k++) |
| 1650 | if (thread_alive (tp_array[k])) |
| 1651 | { |
| 1652 | switch_to_thread (tp_array[k]->ptid); |
| 1653 | printf_filtered (_("\nThread %d (%s):\n"), |
| 1654 | tp_array[k]->num, |
| 1655 | target_pid_to_str (inferior_ptid)); |
| 1656 | execute_command (cmd, from_tty); |
| 1657 | |
| 1658 | /* Restore exact command used previously. */ |
| 1659 | strcpy (cmd, saved_cmd); |
| 1660 | } |
| 1661 | } |
| 1662 | |
| 1663 | do_cleanups (old_chain); |
| 1664 | } |
| 1665 | |
| 1666 | static void |
| 1667 | thread_apply_command (char *tidlist, int from_tty) |
| 1668 | { |
| 1669 | char *cmd; |
| 1670 | struct cleanup *old_chain; |
| 1671 | char *saved_cmd; |
| 1672 | struct get_number_or_range_state state; |
| 1673 | |
| 1674 | if (tidlist == NULL || *tidlist == '\000') |
| 1675 | error (_("Please specify a thread ID list")); |
| 1676 | |
| 1677 | for (cmd = tidlist; *cmd != '\000' && !isalpha (*cmd); cmd++); |
| 1678 | |
| 1679 | if (*cmd == '\000') |
| 1680 | error (_("Please specify a command following the thread ID list")); |
| 1681 | |
| 1682 | /* Save a copy of the command in case it is clobbered by |
| 1683 | execute_command. */ |
| 1684 | saved_cmd = xstrdup (cmd); |
| 1685 | old_chain = make_cleanup (xfree, saved_cmd); |
| 1686 | |
| 1687 | init_number_or_range (&state, tidlist); |
| 1688 | while (!state.finished && state.string < cmd) |
| 1689 | { |
| 1690 | struct thread_info *tp; |
| 1691 | int start; |
| 1692 | |
| 1693 | start = get_number_or_range (&state); |
| 1694 | |
| 1695 | make_cleanup_restore_current_thread (); |
| 1696 | |
| 1697 | tp = find_thread_id (start); |
| 1698 | |
| 1699 | if (!tp) |
| 1700 | warning (_("Unknown thread %d."), start); |
| 1701 | else if (!thread_alive (tp)) |
| 1702 | warning (_("Thread %d has terminated."), start); |
| 1703 | else |
| 1704 | { |
| 1705 | switch_to_thread (tp->ptid); |
| 1706 | |
| 1707 | printf_filtered (_("\nThread %d (%s):\n"), tp->num, |
| 1708 | target_pid_to_str (inferior_ptid)); |
| 1709 | execute_command (cmd, from_tty); |
| 1710 | |
| 1711 | /* Restore exact command used previously. */ |
| 1712 | strcpy (cmd, saved_cmd); |
| 1713 | } |
| 1714 | } |
| 1715 | |
| 1716 | do_cleanups (old_chain); |
| 1717 | } |
| 1718 | |
| 1719 | /* Switch to the specified thread. Will dispatch off to thread_apply_command |
| 1720 | if prefix of arg is `apply'. */ |
| 1721 | |
| 1722 | void |
| 1723 | thread_command (char *tidstr, int from_tty) |
| 1724 | { |
| 1725 | if (!tidstr) |
| 1726 | { |
| 1727 | if (ptid_equal (inferior_ptid, null_ptid)) |
| 1728 | error (_("No thread selected")); |
| 1729 | |
| 1730 | if (target_has_stack) |
| 1731 | { |
| 1732 | if (is_exited (inferior_ptid)) |
| 1733 | printf_filtered (_("[Current thread is %d (%s) (exited)]\n"), |
| 1734 | pid_to_thread_id (inferior_ptid), |
| 1735 | target_pid_to_str (inferior_ptid)); |
| 1736 | else |
| 1737 | printf_filtered (_("[Current thread is %d (%s)]\n"), |
| 1738 | pid_to_thread_id (inferior_ptid), |
| 1739 | target_pid_to_str (inferior_ptid)); |
| 1740 | } |
| 1741 | else |
| 1742 | error (_("No stack.")); |
| 1743 | return; |
| 1744 | } |
| 1745 | |
| 1746 | gdb_thread_select (current_uiout, tidstr, NULL); |
| 1747 | } |
| 1748 | |
| 1749 | /* Implementation of `thread name'. */ |
| 1750 | |
| 1751 | static void |
| 1752 | thread_name_command (char *arg, int from_tty) |
| 1753 | { |
| 1754 | struct thread_info *info; |
| 1755 | |
| 1756 | if (ptid_equal (inferior_ptid, null_ptid)) |
| 1757 | error (_("No thread selected")); |
| 1758 | |
| 1759 | arg = skip_spaces (arg); |
| 1760 | |
| 1761 | info = inferior_thread (); |
| 1762 | xfree (info->name); |
| 1763 | info->name = arg ? xstrdup (arg) : NULL; |
| 1764 | } |
| 1765 | |
| 1766 | /* Find thread ids with a name, target pid, or extra info matching ARG. */ |
| 1767 | |
| 1768 | static void |
| 1769 | thread_find_command (char *arg, int from_tty) |
| 1770 | { |
| 1771 | struct thread_info *tp; |
| 1772 | char *tmp; |
| 1773 | unsigned long match = 0; |
| 1774 | |
| 1775 | if (arg == NULL || *arg == '\0') |
| 1776 | error (_("Command requires an argument.")); |
| 1777 | |
| 1778 | tmp = re_comp (arg); |
| 1779 | if (tmp != 0) |
| 1780 | error (_("Invalid regexp (%s): %s"), tmp, arg); |
| 1781 | |
| 1782 | update_thread_list (); |
| 1783 | for (tp = thread_list; tp; tp = tp->next) |
| 1784 | { |
| 1785 | if (tp->name != NULL && re_exec (tp->name)) |
| 1786 | { |
| 1787 | printf_filtered (_("Thread %d has name '%s'\n"), |
| 1788 | tp->num, tp->name); |
| 1789 | match++; |
| 1790 | } |
| 1791 | |
| 1792 | tmp = target_thread_name (tp); |
| 1793 | if (tmp != NULL && re_exec (tmp)) |
| 1794 | { |
| 1795 | printf_filtered (_("Thread %d has target name '%s'\n"), |
| 1796 | tp->num, tmp); |
| 1797 | match++; |
| 1798 | } |
| 1799 | |
| 1800 | tmp = target_pid_to_str (tp->ptid); |
| 1801 | if (tmp != NULL && re_exec (tmp)) |
| 1802 | { |
| 1803 | printf_filtered (_("Thread %d has target id '%s'\n"), |
| 1804 | tp->num, tmp); |
| 1805 | match++; |
| 1806 | } |
| 1807 | |
| 1808 | tmp = target_extra_thread_info (tp); |
| 1809 | if (tmp != NULL && re_exec (tmp)) |
| 1810 | { |
| 1811 | printf_filtered (_("Thread %d has extra info '%s'\n"), |
| 1812 | tp->num, tmp); |
| 1813 | match++; |
| 1814 | } |
| 1815 | } |
| 1816 | if (!match) |
| 1817 | printf_filtered (_("No threads match '%s'\n"), arg); |
| 1818 | } |
| 1819 | |
| 1820 | /* Print notices when new threads are attached and detached. */ |
| 1821 | int print_thread_events = 1; |
| 1822 | static void |
| 1823 | show_print_thread_events (struct ui_file *file, int from_tty, |
| 1824 | struct cmd_list_element *c, const char *value) |
| 1825 | { |
| 1826 | fprintf_filtered (file, |
| 1827 | _("Printing of thread events is %s.\n"), |
| 1828 | value); |
| 1829 | } |
| 1830 | |
| 1831 | static int |
| 1832 | do_captured_thread_select (struct ui_out *uiout, void *tidstr) |
| 1833 | { |
| 1834 | int num; |
| 1835 | struct thread_info *tp; |
| 1836 | |
| 1837 | num = value_as_long (parse_and_eval (tidstr)); |
| 1838 | |
| 1839 | tp = find_thread_id (num); |
| 1840 | |
| 1841 | if (!tp) |
| 1842 | error (_("Thread ID %d not known."), num); |
| 1843 | |
| 1844 | if (!thread_alive (tp)) |
| 1845 | error (_("Thread ID %d has terminated."), num); |
| 1846 | |
| 1847 | switch_to_thread (tp->ptid); |
| 1848 | |
| 1849 | annotate_thread_changed (); |
| 1850 | |
| 1851 | ui_out_text (uiout, "[Switching to thread "); |
| 1852 | ui_out_field_int (uiout, "new-thread-id", pid_to_thread_id (inferior_ptid)); |
| 1853 | ui_out_text (uiout, " ("); |
| 1854 | ui_out_text (uiout, target_pid_to_str (inferior_ptid)); |
| 1855 | ui_out_text (uiout, ")]"); |
| 1856 | |
| 1857 | /* Note that we can't reach this with an exited thread, due to the |
| 1858 | thread_alive check above. */ |
| 1859 | if (tp->state == THREAD_RUNNING) |
| 1860 | ui_out_text (uiout, "(running)\n"); |
| 1861 | else |
| 1862 | { |
| 1863 | ui_out_text (uiout, "\n"); |
| 1864 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
| 1865 | } |
| 1866 | |
| 1867 | /* Since the current thread may have changed, see if there is any |
| 1868 | exited thread we can now delete. */ |
| 1869 | prune_threads (); |
| 1870 | |
| 1871 | return GDB_RC_OK; |
| 1872 | } |
| 1873 | |
| 1874 | enum gdb_rc |
| 1875 | gdb_thread_select (struct ui_out *uiout, char *tidstr, char **error_message) |
| 1876 | { |
| 1877 | if (catch_exceptions_with_msg (uiout, do_captured_thread_select, tidstr, |
| 1878 | error_message, RETURN_MASK_ALL) < 0) |
| 1879 | return GDB_RC_FAIL; |
| 1880 | return GDB_RC_OK; |
| 1881 | } |
| 1882 | |
| 1883 | /* Update the 'threads_executing' global based on the threads we know |
| 1884 | about right now. */ |
| 1885 | |
| 1886 | static void |
| 1887 | update_threads_executing (void) |
| 1888 | { |
| 1889 | struct thread_info *tp; |
| 1890 | |
| 1891 | threads_executing = 0; |
| 1892 | ALL_NON_EXITED_THREADS (tp) |
| 1893 | { |
| 1894 | if (tp->executing) |
| 1895 | { |
| 1896 | threads_executing = 1; |
| 1897 | break; |
| 1898 | } |
| 1899 | } |
| 1900 | } |
| 1901 | |
| 1902 | void |
| 1903 | update_thread_list (void) |
| 1904 | { |
| 1905 | target_update_thread_list (); |
| 1906 | update_threads_executing (); |
| 1907 | } |
| 1908 | |
| 1909 | /* Return a new value for the selected thread's id. Return a value of 0 if |
| 1910 | no thread is selected, or no threads exist. */ |
| 1911 | |
| 1912 | static struct value * |
| 1913 | thread_id_make_value (struct gdbarch *gdbarch, struct internalvar *var, |
| 1914 | void *ignore) |
| 1915 | { |
| 1916 | struct thread_info *tp = find_thread_ptid (inferior_ptid); |
| 1917 | |
| 1918 | return value_from_longest (builtin_type (gdbarch)->builtin_int, |
| 1919 | (tp ? tp->num : 0)); |
| 1920 | } |
| 1921 | |
| 1922 | /* Commands with a prefix of `thread'. */ |
| 1923 | struct cmd_list_element *thread_cmd_list = NULL; |
| 1924 | |
| 1925 | /* Implementation of `thread' variable. */ |
| 1926 | |
| 1927 | static const struct internalvar_funcs thread_funcs = |
| 1928 | { |
| 1929 | thread_id_make_value, |
| 1930 | NULL, |
| 1931 | NULL |
| 1932 | }; |
| 1933 | |
| 1934 | void |
| 1935 | _initialize_thread (void) |
| 1936 | { |
| 1937 | static struct cmd_list_element *thread_apply_list = NULL; |
| 1938 | |
| 1939 | add_info ("threads", info_threads_command, |
| 1940 | _("Display currently known threads.\n\ |
| 1941 | Usage: info threads [ID]...\n\ |
| 1942 | Optional arguments are thread IDs with spaces between.\n\ |
| 1943 | If no arguments, all threads are displayed.")); |
| 1944 | |
| 1945 | add_prefix_cmd ("thread", class_run, thread_command, _("\ |
| 1946 | Use this command to switch between threads.\n\ |
| 1947 | The new thread ID must be currently known."), |
| 1948 | &thread_cmd_list, "thread ", 1, &cmdlist); |
| 1949 | |
| 1950 | add_prefix_cmd ("apply", class_run, thread_apply_command, |
| 1951 | _("Apply a command to a list of threads."), |
| 1952 | &thread_apply_list, "thread apply ", 1, &thread_cmd_list); |
| 1953 | |
| 1954 | add_cmd ("all", class_run, thread_apply_all_command, |
| 1955 | _("\ |
| 1956 | Apply a command to all threads.\n\ |
| 1957 | \n\ |
| 1958 | Usage: thread apply all [-ascending] <command>\n\ |
| 1959 | -ascending: Call <command> for all threads in ascending order.\n\ |
| 1960 | The default is descending order.\ |
| 1961 | "), |
| 1962 | &thread_apply_list); |
| 1963 | |
| 1964 | add_cmd ("name", class_run, thread_name_command, |
| 1965 | _("Set the current thread's name.\n\ |
| 1966 | Usage: thread name [NAME]\n\ |
| 1967 | If NAME is not given, then any existing name is removed."), &thread_cmd_list); |
| 1968 | |
| 1969 | add_cmd ("find", class_run, thread_find_command, _("\ |
| 1970 | Find threads that match a regular expression.\n\ |
| 1971 | Usage: thread find REGEXP\n\ |
| 1972 | Will display thread ids whose name, target ID, or extra info matches REGEXP."), |
| 1973 | &thread_cmd_list); |
| 1974 | |
| 1975 | add_com_alias ("t", "thread", class_run, 1); |
| 1976 | |
| 1977 | add_setshow_boolean_cmd ("thread-events", no_class, |
| 1978 | &print_thread_events, _("\ |
| 1979 | Set printing of thread events (such as thread start and exit)."), _("\ |
| 1980 | Show printing of thread events (such as thread start and exit)."), NULL, |
| 1981 | NULL, |
| 1982 | show_print_thread_events, |
| 1983 | &setprintlist, &showprintlist); |
| 1984 | |
| 1985 | create_internalvar_type_lazy ("_thread", &thread_funcs, NULL); |
| 1986 | |
| 1987 | observer_attach_thread_ptid_changed (restore_current_thread_ptid_changed); |
| 1988 | } |