| 1 | /* Multi-process/thread control for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 1986-2013 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 "exceptions.h" |
| 31 | #include "command.h" |
| 32 | #include "gdbcmd.h" |
| 33 | #include "regcache.h" |
| 34 | #include "gdb.h" |
| 35 | #include <string.h> |
| 36 | #include "btrace.h" |
| 37 | |
| 38 | #include <ctype.h> |
| 39 | #include <sys/types.h> |
| 40 | #include <signal.h> |
| 41 | #include "ui-out.h" |
| 42 | #include "observer.h" |
| 43 | #include "annotate.h" |
| 44 | #include "cli/cli-decode.h" |
| 45 | #include "gdb_regex.h" |
| 46 | #include "cli/cli-utils.h" |
| 47 | #include "continuations.h" |
| 48 | |
| 49 | /* Definition of struct thread_info exported to gdbthread.h. */ |
| 50 | |
| 51 | /* Prototypes for exported functions. */ |
| 52 | |
| 53 | void _initialize_thread (void); |
| 54 | |
| 55 | /* Prototypes for local functions. */ |
| 56 | |
| 57 | struct thread_info *thread_list = NULL; |
| 58 | static int highest_thread_num; |
| 59 | |
| 60 | static void thread_command (char *tidstr, int from_tty); |
| 61 | static void thread_apply_all_command (char *, int); |
| 62 | static int thread_alive (struct thread_info *); |
| 63 | static void info_threads_command (char *, int); |
| 64 | static void thread_apply_command (char *, int); |
| 65 | static void restore_current_thread (ptid_t); |
| 66 | static void prune_threads (void); |
| 67 | |
| 68 | /* Data to cleanup thread array. */ |
| 69 | |
| 70 | struct thread_array_cleanup |
| 71 | { |
| 72 | /* Array of thread pointers used to set |
| 73 | reference count. */ |
| 74 | struct thread_info **tp_array; |
| 75 | |
| 76 | /* Thread count in the array. */ |
| 77 | int count; |
| 78 | }; |
| 79 | |
| 80 | |
| 81 | struct thread_info* |
| 82 | inferior_thread (void) |
| 83 | { |
| 84 | struct thread_info *tp = find_thread_ptid (inferior_ptid); |
| 85 | gdb_assert (tp); |
| 86 | return tp; |
| 87 | } |
| 88 | |
| 89 | void |
| 90 | delete_step_resume_breakpoint (struct thread_info *tp) |
| 91 | { |
| 92 | if (tp && tp->control.step_resume_breakpoint) |
| 93 | { |
| 94 | delete_breakpoint (tp->control.step_resume_breakpoint); |
| 95 | tp->control.step_resume_breakpoint = NULL; |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | void |
| 100 | delete_exception_resume_breakpoint (struct thread_info *tp) |
| 101 | { |
| 102 | if (tp && tp->control.exception_resume_breakpoint) |
| 103 | { |
| 104 | delete_breakpoint (tp->control.exception_resume_breakpoint); |
| 105 | tp->control.exception_resume_breakpoint = NULL; |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | static void |
| 110 | clear_thread_inferior_resources (struct thread_info *tp) |
| 111 | { |
| 112 | /* NOTE: this will take care of any left-over step_resume breakpoints, |
| 113 | but not any user-specified thread-specific breakpoints. We can not |
| 114 | delete the breakpoint straight-off, because the inferior might not |
| 115 | be stopped at the moment. */ |
| 116 | if (tp->control.step_resume_breakpoint) |
| 117 | { |
| 118 | tp->control.step_resume_breakpoint->disposition = disp_del_at_next_stop; |
| 119 | tp->control.step_resume_breakpoint = NULL; |
| 120 | } |
| 121 | |
| 122 | if (tp->control.exception_resume_breakpoint) |
| 123 | { |
| 124 | tp->control.exception_resume_breakpoint->disposition |
| 125 | = disp_del_at_next_stop; |
| 126 | tp->control.exception_resume_breakpoint = NULL; |
| 127 | } |
| 128 | |
| 129 | delete_longjmp_breakpoint_at_next_stop (tp->num); |
| 130 | |
| 131 | bpstat_clear (&tp->control.stop_bpstat); |
| 132 | |
| 133 | btrace_teardown (tp); |
| 134 | |
| 135 | do_all_intermediate_continuations_thread (tp, 1); |
| 136 | do_all_continuations_thread (tp, 1); |
| 137 | } |
| 138 | |
| 139 | static void |
| 140 | free_thread (struct thread_info *tp) |
| 141 | { |
| 142 | if (tp->private) |
| 143 | { |
| 144 | if (tp->private_dtor) |
| 145 | tp->private_dtor (tp->private); |
| 146 | else |
| 147 | xfree (tp->private); |
| 148 | } |
| 149 | |
| 150 | xfree (tp->name); |
| 151 | xfree (tp); |
| 152 | } |
| 153 | |
| 154 | void |
| 155 | init_thread_list (void) |
| 156 | { |
| 157 | struct thread_info *tp, *tpnext; |
| 158 | |
| 159 | highest_thread_num = 0; |
| 160 | |
| 161 | if (!thread_list) |
| 162 | return; |
| 163 | |
| 164 | for (tp = thread_list; tp; tp = tpnext) |
| 165 | { |
| 166 | tpnext = tp->next; |
| 167 | free_thread (tp); |
| 168 | } |
| 169 | |
| 170 | thread_list = NULL; |
| 171 | } |
| 172 | |
| 173 | /* Allocate a new thread with target id PTID and add it to the thread |
| 174 | list. */ |
| 175 | |
| 176 | static struct thread_info * |
| 177 | new_thread (ptid_t ptid) |
| 178 | { |
| 179 | struct thread_info *tp; |
| 180 | |
| 181 | tp = xcalloc (1, sizeof (*tp)); |
| 182 | |
| 183 | tp->ptid = ptid; |
| 184 | tp->num = ++highest_thread_num; |
| 185 | tp->next = thread_list; |
| 186 | thread_list = tp; |
| 187 | |
| 188 | /* Nothing to follow yet. */ |
| 189 | tp->pending_follow.kind = TARGET_WAITKIND_SPURIOUS; |
| 190 | tp->state = THREAD_STOPPED; |
| 191 | |
| 192 | return tp; |
| 193 | } |
| 194 | |
| 195 | struct thread_info * |
| 196 | add_thread_silent (ptid_t ptid) |
| 197 | { |
| 198 | struct thread_info *tp; |
| 199 | |
| 200 | tp = find_thread_ptid (ptid); |
| 201 | if (tp) |
| 202 | /* Found an old thread with the same id. It has to be dead, |
| 203 | otherwise we wouldn't be adding a new thread with the same id. |
| 204 | The OS is reusing this id --- delete it, and recreate a new |
| 205 | one. */ |
| 206 | { |
| 207 | /* In addition to deleting the thread, if this is the current |
| 208 | thread, then we need to take care that delete_thread doesn't |
| 209 | really delete the thread if it is inferior_ptid. Create a |
| 210 | new template thread in the list with an invalid ptid, switch |
| 211 | to it, delete the original thread, reset the new thread's |
| 212 | ptid, and switch to it. */ |
| 213 | |
| 214 | if (ptid_equal (inferior_ptid, ptid)) |
| 215 | { |
| 216 | tp = new_thread (null_ptid); |
| 217 | |
| 218 | /* Make switch_to_thread not read from the thread. */ |
| 219 | tp->state = THREAD_EXITED; |
| 220 | switch_to_thread (null_ptid); |
| 221 | |
| 222 | /* Now we can delete it. */ |
| 223 | delete_thread (ptid); |
| 224 | |
| 225 | /* Now reset its ptid, and reswitch inferior_ptid to it. */ |
| 226 | tp->ptid = ptid; |
| 227 | tp->state = THREAD_STOPPED; |
| 228 | switch_to_thread (ptid); |
| 229 | |
| 230 | observer_notify_new_thread (tp); |
| 231 | |
| 232 | /* All done. */ |
| 233 | return tp; |
| 234 | } |
| 235 | else |
| 236 | /* Just go ahead and delete it. */ |
| 237 | delete_thread (ptid); |
| 238 | } |
| 239 | |
| 240 | tp = new_thread (ptid); |
| 241 | observer_notify_new_thread (tp); |
| 242 | |
| 243 | return tp; |
| 244 | } |
| 245 | |
| 246 | struct thread_info * |
| 247 | add_thread_with_info (ptid_t ptid, struct private_thread_info *private) |
| 248 | { |
| 249 | struct thread_info *result = add_thread_silent (ptid); |
| 250 | |
| 251 | result->private = private; |
| 252 | |
| 253 | if (print_thread_events) |
| 254 | printf_unfiltered (_("[New %s]\n"), target_pid_to_str (ptid)); |
| 255 | |
| 256 | annotate_new_thread (); |
| 257 | return result; |
| 258 | } |
| 259 | |
| 260 | struct thread_info * |
| 261 | add_thread (ptid_t ptid) |
| 262 | { |
| 263 | return add_thread_with_info (ptid, NULL); |
| 264 | } |
| 265 | |
| 266 | /* Delete thread PTID. If SILENT, don't notify the observer of this |
| 267 | exit. */ |
| 268 | static void |
| 269 | delete_thread_1 (ptid_t ptid, int silent) |
| 270 | { |
| 271 | struct thread_info *tp, *tpprev; |
| 272 | |
| 273 | tpprev = NULL; |
| 274 | |
| 275 | for (tp = thread_list; tp; tpprev = tp, tp = tp->next) |
| 276 | if (ptid_equal (tp->ptid, ptid)) |
| 277 | break; |
| 278 | |
| 279 | if (!tp) |
| 280 | return; |
| 281 | |
| 282 | /* If this is the current thread, or there's code out there that |
| 283 | relies on it existing (refcount > 0) we can't delete yet. Mark |
| 284 | it as exited, and notify it. */ |
| 285 | if (tp->refcount > 0 |
| 286 | || ptid_equal (tp->ptid, inferior_ptid)) |
| 287 | { |
| 288 | if (tp->state != THREAD_EXITED) |
| 289 | { |
| 290 | observer_notify_thread_exit (tp, silent); |
| 291 | |
| 292 | /* Tag it as exited. */ |
| 293 | tp->state = THREAD_EXITED; |
| 294 | |
| 295 | /* Clear breakpoints, etc. associated with this thread. */ |
| 296 | clear_thread_inferior_resources (tp); |
| 297 | } |
| 298 | |
| 299 | /* Will be really deleted some other time. */ |
| 300 | return; |
| 301 | } |
| 302 | |
| 303 | /* Notify thread exit, but only if we haven't already. */ |
| 304 | if (tp->state != THREAD_EXITED) |
| 305 | observer_notify_thread_exit (tp, silent); |
| 306 | |
| 307 | /* Tag it as exited. */ |
| 308 | tp->state = THREAD_EXITED; |
| 309 | clear_thread_inferior_resources (tp); |
| 310 | |
| 311 | if (tpprev) |
| 312 | tpprev->next = tp->next; |
| 313 | else |
| 314 | thread_list = tp->next; |
| 315 | |
| 316 | free_thread (tp); |
| 317 | } |
| 318 | |
| 319 | /* Delete thread PTID and notify of thread exit. If this is |
| 320 | inferior_ptid, don't actually delete it, but tag it as exited and |
| 321 | do the notification. If PTID is the user selected thread, clear |
| 322 | it. */ |
| 323 | void |
| 324 | delete_thread (ptid_t ptid) |
| 325 | { |
| 326 | delete_thread_1 (ptid, 0 /* not silent */); |
| 327 | } |
| 328 | |
| 329 | void |
| 330 | delete_thread_silent (ptid_t ptid) |
| 331 | { |
| 332 | delete_thread_1 (ptid, 1 /* silent */); |
| 333 | } |
| 334 | |
| 335 | struct thread_info * |
| 336 | find_thread_id (int num) |
| 337 | { |
| 338 | struct thread_info *tp; |
| 339 | |
| 340 | for (tp = thread_list; tp; tp = tp->next) |
| 341 | if (tp->num == num) |
| 342 | return tp; |
| 343 | |
| 344 | return NULL; |
| 345 | } |
| 346 | |
| 347 | /* Find a thread_info by matching PTID. */ |
| 348 | struct thread_info * |
| 349 | find_thread_ptid (ptid_t ptid) |
| 350 | { |
| 351 | struct thread_info *tp; |
| 352 | |
| 353 | for (tp = thread_list; tp; tp = tp->next) |
| 354 | if (ptid_equal (tp->ptid, ptid)) |
| 355 | return tp; |
| 356 | |
| 357 | return NULL; |
| 358 | } |
| 359 | |
| 360 | /* |
| 361 | * Thread iterator function. |
| 362 | * |
| 363 | * Calls a callback function once for each thread, so long as |
| 364 | * the callback function returns false. If the callback function |
| 365 | * returns true, the iteration will end and the current thread |
| 366 | * will be returned. This can be useful for implementing a |
| 367 | * search for a thread with arbitrary attributes, or for applying |
| 368 | * some operation to every thread. |
| 369 | * |
| 370 | * FIXME: some of the existing functionality, such as |
| 371 | * "Thread apply all", might be rewritten using this functionality. |
| 372 | */ |
| 373 | |
| 374 | struct thread_info * |
| 375 | iterate_over_threads (int (*callback) (struct thread_info *, void *), |
| 376 | void *data) |
| 377 | { |
| 378 | struct thread_info *tp, *next; |
| 379 | |
| 380 | for (tp = thread_list; tp; tp = next) |
| 381 | { |
| 382 | next = tp->next; |
| 383 | if ((*callback) (tp, data)) |
| 384 | return tp; |
| 385 | } |
| 386 | |
| 387 | return NULL; |
| 388 | } |
| 389 | |
| 390 | int |
| 391 | thread_count (void) |
| 392 | { |
| 393 | int result = 0; |
| 394 | struct thread_info *tp; |
| 395 | |
| 396 | for (tp = thread_list; tp; tp = tp->next) |
| 397 | ++result; |
| 398 | |
| 399 | return result; |
| 400 | } |
| 401 | |
| 402 | int |
| 403 | valid_thread_id (int num) |
| 404 | { |
| 405 | struct thread_info *tp; |
| 406 | |
| 407 | for (tp = thread_list; tp; tp = tp->next) |
| 408 | if (tp->num == num) |
| 409 | return 1; |
| 410 | |
| 411 | return 0; |
| 412 | } |
| 413 | |
| 414 | int |
| 415 | pid_to_thread_id (ptid_t ptid) |
| 416 | { |
| 417 | struct thread_info *tp; |
| 418 | |
| 419 | for (tp = thread_list; tp; tp = tp->next) |
| 420 | if (ptid_equal (tp->ptid, ptid)) |
| 421 | return tp->num; |
| 422 | |
| 423 | return 0; |
| 424 | } |
| 425 | |
| 426 | ptid_t |
| 427 | thread_id_to_pid (int num) |
| 428 | { |
| 429 | struct thread_info *thread = find_thread_id (num); |
| 430 | |
| 431 | if (thread) |
| 432 | return thread->ptid; |
| 433 | else |
| 434 | return pid_to_ptid (-1); |
| 435 | } |
| 436 | |
| 437 | int |
| 438 | in_thread_list (ptid_t ptid) |
| 439 | { |
| 440 | struct thread_info *tp; |
| 441 | |
| 442 | for (tp = thread_list; tp; tp = tp->next) |
| 443 | if (ptid_equal (tp->ptid, ptid)) |
| 444 | return 1; |
| 445 | |
| 446 | return 0; /* Never heard of 'im. */ |
| 447 | } |
| 448 | |
| 449 | /* Finds the first thread of the inferior given by PID. If PID is -1, |
| 450 | return the first thread in the list. */ |
| 451 | |
| 452 | struct thread_info * |
| 453 | first_thread_of_process (int pid) |
| 454 | { |
| 455 | struct thread_info *tp, *ret = NULL; |
| 456 | |
| 457 | for (tp = thread_list; tp; tp = tp->next) |
| 458 | if (pid == -1 || ptid_get_pid (tp->ptid) == pid) |
| 459 | if (ret == NULL || tp->num < ret->num) |
| 460 | ret = tp; |
| 461 | |
| 462 | return ret; |
| 463 | } |
| 464 | |
| 465 | struct thread_info * |
| 466 | any_thread_of_process (int pid) |
| 467 | { |
| 468 | struct thread_info *tp; |
| 469 | |
| 470 | for (tp = thread_list; tp; tp = tp->next) |
| 471 | if (ptid_get_pid (tp->ptid) == pid) |
| 472 | return tp; |
| 473 | |
| 474 | return NULL; |
| 475 | } |
| 476 | |
| 477 | struct thread_info * |
| 478 | any_live_thread_of_process (int pid) |
| 479 | { |
| 480 | struct thread_info *tp; |
| 481 | struct thread_info *tp_executing = NULL; |
| 482 | |
| 483 | for (tp = thread_list; tp; tp = tp->next) |
| 484 | if (tp->state != THREAD_EXITED && ptid_get_pid (tp->ptid) == pid) |
| 485 | { |
| 486 | if (tp->executing) |
| 487 | tp_executing = tp; |
| 488 | else |
| 489 | return tp; |
| 490 | } |
| 491 | |
| 492 | return tp_executing; |
| 493 | } |
| 494 | |
| 495 | /* Print a list of thread ids currently known, and the total number of |
| 496 | threads. To be used from within catch_errors. */ |
| 497 | static int |
| 498 | do_captured_list_thread_ids (struct ui_out *uiout, void *arg) |
| 499 | { |
| 500 | struct thread_info *tp; |
| 501 | int num = 0; |
| 502 | struct cleanup *cleanup_chain; |
| 503 | int current_thread = -1; |
| 504 | |
| 505 | update_thread_list (); |
| 506 | |
| 507 | cleanup_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "thread-ids"); |
| 508 | |
| 509 | for (tp = thread_list; tp; tp = tp->next) |
| 510 | { |
| 511 | if (tp->state == THREAD_EXITED) |
| 512 | continue; |
| 513 | |
| 514 | if (ptid_equal (tp->ptid, inferior_ptid)) |
| 515 | current_thread = tp->num; |
| 516 | |
| 517 | num++; |
| 518 | ui_out_field_int (uiout, "thread-id", tp->num); |
| 519 | } |
| 520 | |
| 521 | do_cleanups (cleanup_chain); |
| 522 | |
| 523 | if (current_thread != -1) |
| 524 | ui_out_field_int (uiout, "current-thread-id", current_thread); |
| 525 | ui_out_field_int (uiout, "number-of-threads", num); |
| 526 | return GDB_RC_OK; |
| 527 | } |
| 528 | |
| 529 | /* Official gdblib interface function to get a list of thread ids and |
| 530 | the total number. */ |
| 531 | enum gdb_rc |
| 532 | gdb_list_thread_ids (struct ui_out *uiout, char **error_message) |
| 533 | { |
| 534 | if (catch_exceptions_with_msg (uiout, do_captured_list_thread_ids, NULL, |
| 535 | error_message, RETURN_MASK_ALL) < 0) |
| 536 | return GDB_RC_FAIL; |
| 537 | return GDB_RC_OK; |
| 538 | } |
| 539 | |
| 540 | /* Return true if TP is an active thread. */ |
| 541 | static int |
| 542 | thread_alive (struct thread_info *tp) |
| 543 | { |
| 544 | if (tp->state == THREAD_EXITED) |
| 545 | return 0; |
| 546 | if (!target_thread_alive (tp->ptid)) |
| 547 | return 0; |
| 548 | return 1; |
| 549 | } |
| 550 | |
| 551 | static void |
| 552 | prune_threads (void) |
| 553 | { |
| 554 | struct thread_info *tp, *next; |
| 555 | |
| 556 | for (tp = thread_list; tp; tp = next) |
| 557 | { |
| 558 | next = tp->next; |
| 559 | if (!thread_alive (tp)) |
| 560 | delete_thread (tp->ptid); |
| 561 | } |
| 562 | } |
| 563 | |
| 564 | void |
| 565 | thread_change_ptid (ptid_t old_ptid, ptid_t new_ptid) |
| 566 | { |
| 567 | struct inferior *inf; |
| 568 | struct thread_info *tp; |
| 569 | |
| 570 | /* It can happen that what we knew as the target inferior id |
| 571 | changes. E.g, target remote may only discover the remote process |
| 572 | pid after adding the inferior to GDB's list. */ |
| 573 | inf = find_inferior_pid (ptid_get_pid (old_ptid)); |
| 574 | inf->pid = ptid_get_pid (new_ptid); |
| 575 | |
| 576 | tp = find_thread_ptid (old_ptid); |
| 577 | tp->ptid = new_ptid; |
| 578 | |
| 579 | observer_notify_thread_ptid_changed (old_ptid, new_ptid); |
| 580 | } |
| 581 | |
| 582 | void |
| 583 | set_running (ptid_t ptid, int running) |
| 584 | { |
| 585 | struct thread_info *tp; |
| 586 | int all = ptid_equal (ptid, minus_one_ptid); |
| 587 | |
| 588 | /* We try not to notify the observer if no thread has actually changed |
| 589 | the running state -- merely to reduce the number of messages to |
| 590 | frontend. Frontend is supposed to handle multiple *running just fine. */ |
| 591 | if (all || ptid_is_pid (ptid)) |
| 592 | { |
| 593 | int any_started = 0; |
| 594 | |
| 595 | for (tp = thread_list; tp; tp = tp->next) |
| 596 | if (all || ptid_get_pid (tp->ptid) == ptid_get_pid (ptid)) |
| 597 | { |
| 598 | if (tp->state == THREAD_EXITED) |
| 599 | continue; |
| 600 | if (running && tp->state == THREAD_STOPPED) |
| 601 | any_started = 1; |
| 602 | tp->state = running ? THREAD_RUNNING : THREAD_STOPPED; |
| 603 | } |
| 604 | if (any_started) |
| 605 | observer_notify_target_resumed (ptid); |
| 606 | } |
| 607 | else |
| 608 | { |
| 609 | int started = 0; |
| 610 | |
| 611 | tp = find_thread_ptid (ptid); |
| 612 | gdb_assert (tp); |
| 613 | gdb_assert (tp->state != THREAD_EXITED); |
| 614 | if (running && tp->state == THREAD_STOPPED) |
| 615 | started = 1; |
| 616 | tp->state = running ? THREAD_RUNNING : THREAD_STOPPED; |
| 617 | if (started) |
| 618 | observer_notify_target_resumed (ptid); |
| 619 | } |
| 620 | } |
| 621 | |
| 622 | static int |
| 623 | is_thread_state (ptid_t ptid, enum thread_state state) |
| 624 | { |
| 625 | struct thread_info *tp; |
| 626 | |
| 627 | tp = find_thread_ptid (ptid); |
| 628 | gdb_assert (tp); |
| 629 | return tp->state == state; |
| 630 | } |
| 631 | |
| 632 | int |
| 633 | is_stopped (ptid_t ptid) |
| 634 | { |
| 635 | return is_thread_state (ptid, THREAD_STOPPED); |
| 636 | } |
| 637 | |
| 638 | int |
| 639 | is_exited (ptid_t ptid) |
| 640 | { |
| 641 | return is_thread_state (ptid, THREAD_EXITED); |
| 642 | } |
| 643 | |
| 644 | int |
| 645 | is_running (ptid_t ptid) |
| 646 | { |
| 647 | return is_thread_state (ptid, THREAD_RUNNING); |
| 648 | } |
| 649 | |
| 650 | int |
| 651 | any_running (void) |
| 652 | { |
| 653 | struct thread_info *tp; |
| 654 | |
| 655 | for (tp = thread_list; tp; tp = tp->next) |
| 656 | if (tp->state == THREAD_RUNNING) |
| 657 | return 1; |
| 658 | |
| 659 | return 0; |
| 660 | } |
| 661 | |
| 662 | int |
| 663 | is_executing (ptid_t ptid) |
| 664 | { |
| 665 | struct thread_info *tp; |
| 666 | |
| 667 | tp = find_thread_ptid (ptid); |
| 668 | gdb_assert (tp); |
| 669 | return tp->executing; |
| 670 | } |
| 671 | |
| 672 | void |
| 673 | set_executing (ptid_t ptid, int executing) |
| 674 | { |
| 675 | struct thread_info *tp; |
| 676 | int all = ptid_equal (ptid, minus_one_ptid); |
| 677 | |
| 678 | if (all || ptid_is_pid (ptid)) |
| 679 | { |
| 680 | for (tp = thread_list; tp; tp = tp->next) |
| 681 | if (all || ptid_get_pid (tp->ptid) == ptid_get_pid (ptid)) |
| 682 | tp->executing = executing; |
| 683 | } |
| 684 | else |
| 685 | { |
| 686 | tp = find_thread_ptid (ptid); |
| 687 | gdb_assert (tp); |
| 688 | tp->executing = executing; |
| 689 | } |
| 690 | } |
| 691 | |
| 692 | void |
| 693 | set_stop_requested (ptid_t ptid, int stop) |
| 694 | { |
| 695 | struct thread_info *tp; |
| 696 | int all = ptid_equal (ptid, minus_one_ptid); |
| 697 | |
| 698 | if (all || ptid_is_pid (ptid)) |
| 699 | { |
| 700 | for (tp = thread_list; tp; tp = tp->next) |
| 701 | if (all || ptid_get_pid (tp->ptid) == ptid_get_pid (ptid)) |
| 702 | tp->stop_requested = stop; |
| 703 | } |
| 704 | else |
| 705 | { |
| 706 | tp = find_thread_ptid (ptid); |
| 707 | gdb_assert (tp); |
| 708 | tp->stop_requested = stop; |
| 709 | } |
| 710 | |
| 711 | /* Call the stop requested observer so other components of GDB can |
| 712 | react to this request. */ |
| 713 | if (stop) |
| 714 | observer_notify_thread_stop_requested (ptid); |
| 715 | } |
| 716 | |
| 717 | void |
| 718 | finish_thread_state (ptid_t ptid) |
| 719 | { |
| 720 | struct thread_info *tp; |
| 721 | int all; |
| 722 | int any_started = 0; |
| 723 | |
| 724 | all = ptid_equal (ptid, minus_one_ptid); |
| 725 | |
| 726 | if (all || ptid_is_pid (ptid)) |
| 727 | { |
| 728 | for (tp = thread_list; tp; tp = tp->next) |
| 729 | { |
| 730 | if (tp->state == THREAD_EXITED) |
| 731 | continue; |
| 732 | if (all || ptid_get_pid (ptid) == ptid_get_pid (tp->ptid)) |
| 733 | { |
| 734 | if (tp->executing && tp->state == THREAD_STOPPED) |
| 735 | any_started = 1; |
| 736 | tp->state = tp->executing ? THREAD_RUNNING : THREAD_STOPPED; |
| 737 | } |
| 738 | } |
| 739 | } |
| 740 | else |
| 741 | { |
| 742 | tp = find_thread_ptid (ptid); |
| 743 | gdb_assert (tp); |
| 744 | if (tp->state != THREAD_EXITED) |
| 745 | { |
| 746 | if (tp->executing && tp->state == THREAD_STOPPED) |
| 747 | any_started = 1; |
| 748 | tp->state = tp->executing ? THREAD_RUNNING : THREAD_STOPPED; |
| 749 | } |
| 750 | } |
| 751 | |
| 752 | if (any_started) |
| 753 | observer_notify_target_resumed (ptid); |
| 754 | } |
| 755 | |
| 756 | void |
| 757 | finish_thread_state_cleanup (void *arg) |
| 758 | { |
| 759 | ptid_t *ptid_p = arg; |
| 760 | |
| 761 | gdb_assert (arg); |
| 762 | |
| 763 | finish_thread_state (*ptid_p); |
| 764 | } |
| 765 | |
| 766 | int |
| 767 | pc_in_thread_step_range (CORE_ADDR pc, struct thread_info *thread) |
| 768 | { |
| 769 | return (pc >= thread->control.step_range_start |
| 770 | && pc < thread->control.step_range_end); |
| 771 | } |
| 772 | |
| 773 | /* Prints the list of threads and their details on UIOUT. |
| 774 | This is a version of 'info_threads_command' suitable for |
| 775 | use from MI. |
| 776 | If REQUESTED_THREAD is not -1, it's the GDB id of the thread |
| 777 | that should be printed. Otherwise, all threads are |
| 778 | printed. |
| 779 | If PID is not -1, only print threads from the process PID. |
| 780 | Otherwise, threads from all attached PIDs are printed. |
| 781 | If both REQUESTED_THREAD and PID are not -1, then the thread |
| 782 | is printed if it belongs to the specified process. Otherwise, |
| 783 | an error is raised. */ |
| 784 | void |
| 785 | print_thread_info (struct ui_out *uiout, char *requested_threads, int pid) |
| 786 | { |
| 787 | struct thread_info *tp; |
| 788 | ptid_t current_ptid; |
| 789 | struct cleanup *old_chain; |
| 790 | char *extra_info, *name, *target_id; |
| 791 | int current_thread = -1; |
| 792 | |
| 793 | update_thread_list (); |
| 794 | current_ptid = inferior_ptid; |
| 795 | |
| 796 | /* We'll be switching threads temporarily. */ |
| 797 | old_chain = make_cleanup_restore_current_thread (); |
| 798 | |
| 799 | /* For backward compatibility, we make a list for MI. A table is |
| 800 | preferable for the CLI, though, because it shows table |
| 801 | headers. */ |
| 802 | if (ui_out_is_mi_like_p (uiout)) |
| 803 | make_cleanup_ui_out_list_begin_end (uiout, "threads"); |
| 804 | else |
| 805 | { |
| 806 | int n_threads = 0; |
| 807 | |
| 808 | for (tp = thread_list; tp; tp = tp->next) |
| 809 | { |
| 810 | if (!number_is_in_list (requested_threads, tp->num)) |
| 811 | continue; |
| 812 | |
| 813 | if (pid != -1 && ptid_get_pid (tp->ptid) != pid) |
| 814 | continue; |
| 815 | |
| 816 | if (tp->state == THREAD_EXITED) |
| 817 | continue; |
| 818 | |
| 819 | ++n_threads; |
| 820 | } |
| 821 | |
| 822 | if (n_threads == 0) |
| 823 | { |
| 824 | if (requested_threads == NULL || *requested_threads == '\0') |
| 825 | ui_out_message (uiout, 0, _("No threads.\n")); |
| 826 | else |
| 827 | ui_out_message (uiout, 0, _("No threads match '%s'.\n"), |
| 828 | requested_threads); |
| 829 | do_cleanups (old_chain); |
| 830 | return; |
| 831 | } |
| 832 | |
| 833 | make_cleanup_ui_out_table_begin_end (uiout, 4, n_threads, "threads"); |
| 834 | |
| 835 | ui_out_table_header (uiout, 1, ui_left, "current", ""); |
| 836 | ui_out_table_header (uiout, 4, ui_left, "id", "Id"); |
| 837 | ui_out_table_header (uiout, 17, ui_left, "target-id", "Target Id"); |
| 838 | ui_out_table_header (uiout, 1, ui_left, "frame", "Frame"); |
| 839 | ui_out_table_body (uiout); |
| 840 | } |
| 841 | |
| 842 | for (tp = thread_list; tp; tp = tp->next) |
| 843 | { |
| 844 | struct cleanup *chain2; |
| 845 | int core; |
| 846 | |
| 847 | if (!number_is_in_list (requested_threads, tp->num)) |
| 848 | continue; |
| 849 | |
| 850 | if (pid != -1 && ptid_get_pid (tp->ptid) != pid) |
| 851 | { |
| 852 | if (requested_threads != NULL && *requested_threads != '\0') |
| 853 | error (_("Requested thread not found in requested process")); |
| 854 | continue; |
| 855 | } |
| 856 | |
| 857 | if (ptid_equal (tp->ptid, current_ptid)) |
| 858 | current_thread = tp->num; |
| 859 | |
| 860 | if (tp->state == THREAD_EXITED) |
| 861 | continue; |
| 862 | |
| 863 | chain2 = make_cleanup_ui_out_tuple_begin_end (uiout, NULL); |
| 864 | |
| 865 | if (ui_out_is_mi_like_p (uiout)) |
| 866 | { |
| 867 | /* Compatibility. */ |
| 868 | if (ptid_equal (tp->ptid, current_ptid)) |
| 869 | ui_out_text (uiout, "* "); |
| 870 | else |
| 871 | ui_out_text (uiout, " "); |
| 872 | } |
| 873 | else |
| 874 | { |
| 875 | if (ptid_equal (tp->ptid, current_ptid)) |
| 876 | ui_out_field_string (uiout, "current", "*"); |
| 877 | else |
| 878 | ui_out_field_skip (uiout, "current"); |
| 879 | } |
| 880 | |
| 881 | ui_out_field_int (uiout, "id", tp->num); |
| 882 | |
| 883 | /* For the CLI, we stuff everything into the target-id field. |
| 884 | This is a gross hack to make the output come out looking |
| 885 | correct. The underlying problem here is that ui-out has no |
| 886 | way to specify that a field's space allocation should be |
| 887 | shared by several fields. For MI, we do the right thing |
| 888 | instead. */ |
| 889 | |
| 890 | target_id = target_pid_to_str (tp->ptid); |
| 891 | extra_info = target_extra_thread_info (tp); |
| 892 | name = tp->name ? tp->name : target_thread_name (tp); |
| 893 | |
| 894 | if (ui_out_is_mi_like_p (uiout)) |
| 895 | { |
| 896 | ui_out_field_string (uiout, "target-id", target_id); |
| 897 | if (extra_info) |
| 898 | ui_out_field_string (uiout, "details", extra_info); |
| 899 | if (name) |
| 900 | ui_out_field_string (uiout, "name", name); |
| 901 | } |
| 902 | else |
| 903 | { |
| 904 | struct cleanup *str_cleanup; |
| 905 | char *contents; |
| 906 | |
| 907 | if (extra_info && name) |
| 908 | contents = xstrprintf ("%s \"%s\" (%s)", target_id, |
| 909 | name, extra_info); |
| 910 | else if (extra_info) |
| 911 | contents = xstrprintf ("%s (%s)", target_id, extra_info); |
| 912 | else if (name) |
| 913 | contents = xstrprintf ("%s \"%s\"", target_id, name); |
| 914 | else |
| 915 | contents = xstrdup (target_id); |
| 916 | str_cleanup = make_cleanup (xfree, contents); |
| 917 | |
| 918 | ui_out_field_string (uiout, "target-id", contents); |
| 919 | do_cleanups (str_cleanup); |
| 920 | } |
| 921 | |
| 922 | if (tp->state == THREAD_RUNNING) |
| 923 | ui_out_text (uiout, "(running)\n"); |
| 924 | else |
| 925 | { |
| 926 | /* The switch below puts us at the top of the stack (leaf |
| 927 | frame). */ |
| 928 | switch_to_thread (tp->ptid); |
| 929 | print_stack_frame (get_selected_frame (NULL), |
| 930 | /* For MI output, print frame level. */ |
| 931 | ui_out_is_mi_like_p (uiout), |
| 932 | LOCATION, 0); |
| 933 | } |
| 934 | |
| 935 | if (ui_out_is_mi_like_p (uiout)) |
| 936 | { |
| 937 | char *state = "stopped"; |
| 938 | |
| 939 | if (tp->state == THREAD_RUNNING) |
| 940 | state = "running"; |
| 941 | ui_out_field_string (uiout, "state", state); |
| 942 | } |
| 943 | |
| 944 | core = target_core_of_thread (tp->ptid); |
| 945 | if (ui_out_is_mi_like_p (uiout) && core != -1) |
| 946 | ui_out_field_int (uiout, "core", core); |
| 947 | |
| 948 | do_cleanups (chain2); |
| 949 | } |
| 950 | |
| 951 | /* Restores the current thread and the frame selected before |
| 952 | the "info threads" command. */ |
| 953 | do_cleanups (old_chain); |
| 954 | |
| 955 | if (pid == -1 && requested_threads == NULL) |
| 956 | { |
| 957 | gdb_assert (current_thread != -1 |
| 958 | || !thread_list |
| 959 | || ptid_equal (inferior_ptid, null_ptid)); |
| 960 | if (current_thread != -1 && ui_out_is_mi_like_p (uiout)) |
| 961 | ui_out_field_int (uiout, "current-thread-id", current_thread); |
| 962 | |
| 963 | if (current_thread != -1 && is_exited (current_ptid)) |
| 964 | ui_out_message (uiout, 0, "\n\ |
| 965 | The current thread <Thread ID %d> has terminated. See `help thread'.\n", |
| 966 | current_thread); |
| 967 | else if (thread_list |
| 968 | && current_thread == -1 |
| 969 | && ptid_equal (current_ptid, null_ptid)) |
| 970 | ui_out_message (uiout, 0, "\n\ |
| 971 | No selected thread. See `help thread'.\n"); |
| 972 | } |
| 973 | } |
| 974 | |
| 975 | /* Print information about currently known threads |
| 976 | |
| 977 | Optional ARG is a thread id, or list of thread ids. |
| 978 | |
| 979 | Note: this has the drawback that it _really_ switches |
| 980 | threads, which frees the frame cache. A no-side |
| 981 | effects info-threads command would be nicer. */ |
| 982 | |
| 983 | static void |
| 984 | info_threads_command (char *arg, int from_tty) |
| 985 | { |
| 986 | print_thread_info (current_uiout, arg, -1); |
| 987 | } |
| 988 | |
| 989 | /* Switch from one thread to another. */ |
| 990 | |
| 991 | void |
| 992 | switch_to_thread (ptid_t ptid) |
| 993 | { |
| 994 | /* Switch the program space as well, if we can infer it from the now |
| 995 | current thread. Otherwise, it's up to the caller to select the |
| 996 | space it wants. */ |
| 997 | if (!ptid_equal (ptid, null_ptid)) |
| 998 | { |
| 999 | struct inferior *inf; |
| 1000 | |
| 1001 | inf = find_inferior_pid (ptid_get_pid (ptid)); |
| 1002 | gdb_assert (inf != NULL); |
| 1003 | set_current_program_space (inf->pspace); |
| 1004 | set_current_inferior (inf); |
| 1005 | } |
| 1006 | |
| 1007 | if (ptid_equal (ptid, inferior_ptid)) |
| 1008 | return; |
| 1009 | |
| 1010 | inferior_ptid = ptid; |
| 1011 | reinit_frame_cache (); |
| 1012 | |
| 1013 | /* We don't check for is_stopped, because we're called at times |
| 1014 | while in the TARGET_RUNNING state, e.g., while handling an |
| 1015 | internal event. */ |
| 1016 | if (!ptid_equal (inferior_ptid, null_ptid) |
| 1017 | && !is_exited (ptid) |
| 1018 | && !is_executing (ptid)) |
| 1019 | stop_pc = regcache_read_pc (get_thread_regcache (ptid)); |
| 1020 | else |
| 1021 | stop_pc = ~(CORE_ADDR) 0; |
| 1022 | } |
| 1023 | |
| 1024 | static void |
| 1025 | restore_current_thread (ptid_t ptid) |
| 1026 | { |
| 1027 | switch_to_thread (ptid); |
| 1028 | } |
| 1029 | |
| 1030 | static void |
| 1031 | restore_selected_frame (struct frame_id a_frame_id, int frame_level) |
| 1032 | { |
| 1033 | struct frame_info *frame = NULL; |
| 1034 | int count; |
| 1035 | |
| 1036 | /* This means there was no selected frame. */ |
| 1037 | if (frame_level == -1) |
| 1038 | { |
| 1039 | select_frame (NULL); |
| 1040 | return; |
| 1041 | } |
| 1042 | |
| 1043 | gdb_assert (frame_level >= 0); |
| 1044 | |
| 1045 | /* Restore by level first, check if the frame id is the same as |
| 1046 | expected. If that fails, try restoring by frame id. If that |
| 1047 | fails, nothing to do, just warn the user. */ |
| 1048 | |
| 1049 | count = frame_level; |
| 1050 | frame = find_relative_frame (get_current_frame (), &count); |
| 1051 | if (count == 0 |
| 1052 | && frame != NULL |
| 1053 | /* The frame ids must match - either both valid or both outer_frame_id. |
| 1054 | The latter case is not failsafe, but since it's highly unlikely |
| 1055 | the search by level finds the wrong frame, it's 99.9(9)% of |
| 1056 | the time (for all practical purposes) safe. */ |
| 1057 | && frame_id_eq (get_frame_id (frame), a_frame_id)) |
| 1058 | { |
| 1059 | /* Cool, all is fine. */ |
| 1060 | select_frame (frame); |
| 1061 | return; |
| 1062 | } |
| 1063 | |
| 1064 | frame = frame_find_by_id (a_frame_id); |
| 1065 | if (frame != NULL) |
| 1066 | { |
| 1067 | /* Cool, refound it. */ |
| 1068 | select_frame (frame); |
| 1069 | return; |
| 1070 | } |
| 1071 | |
| 1072 | /* Nothing else to do, the frame layout really changed. Select the |
| 1073 | innermost stack frame. */ |
| 1074 | select_frame (get_current_frame ()); |
| 1075 | |
| 1076 | /* Warn the user. */ |
| 1077 | if (frame_level > 0 && !ui_out_is_mi_like_p (current_uiout)) |
| 1078 | { |
| 1079 | warning (_("Couldn't restore frame #%d in " |
| 1080 | "current thread. Bottom (innermost) frame selected:"), |
| 1081 | frame_level); |
| 1082 | /* For MI, we should probably have a notification about |
| 1083 | current frame change. But this error is not very |
| 1084 | likely, so don't bother for now. */ |
| 1085 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
| 1086 | } |
| 1087 | } |
| 1088 | |
| 1089 | struct current_thread_cleanup |
| 1090 | { |
| 1091 | ptid_t inferior_ptid; |
| 1092 | struct frame_id selected_frame_id; |
| 1093 | int selected_frame_level; |
| 1094 | int was_stopped; |
| 1095 | int inf_id; |
| 1096 | int was_removable; |
| 1097 | }; |
| 1098 | |
| 1099 | static void |
| 1100 | do_restore_current_thread_cleanup (void *arg) |
| 1101 | { |
| 1102 | struct thread_info *tp; |
| 1103 | struct current_thread_cleanup *old = arg; |
| 1104 | |
| 1105 | tp = find_thread_ptid (old->inferior_ptid); |
| 1106 | |
| 1107 | /* If the previously selected thread belonged to a process that has |
| 1108 | in the mean time been deleted (due to normal exit, detach, etc.), |
| 1109 | then don't revert back to it, but instead simply drop back to no |
| 1110 | thread selected. */ |
| 1111 | if (tp |
| 1112 | && find_inferior_pid (ptid_get_pid (tp->ptid)) != NULL) |
| 1113 | restore_current_thread (old->inferior_ptid); |
| 1114 | else |
| 1115 | { |
| 1116 | restore_current_thread (null_ptid); |
| 1117 | set_current_inferior (find_inferior_id (old->inf_id)); |
| 1118 | } |
| 1119 | |
| 1120 | /* The running state of the originally selected thread may have |
| 1121 | changed, so we have to recheck it here. */ |
| 1122 | if (!ptid_equal (inferior_ptid, null_ptid) |
| 1123 | && old->was_stopped |
| 1124 | && is_stopped (inferior_ptid) |
| 1125 | && target_has_registers |
| 1126 | && target_has_stack |
| 1127 | && target_has_memory) |
| 1128 | restore_selected_frame (old->selected_frame_id, |
| 1129 | old->selected_frame_level); |
| 1130 | } |
| 1131 | |
| 1132 | static void |
| 1133 | restore_current_thread_cleanup_dtor (void *arg) |
| 1134 | { |
| 1135 | struct current_thread_cleanup *old = arg; |
| 1136 | struct thread_info *tp; |
| 1137 | struct inferior *inf; |
| 1138 | |
| 1139 | tp = find_thread_ptid (old->inferior_ptid); |
| 1140 | if (tp) |
| 1141 | tp->refcount--; |
| 1142 | inf = find_inferior_id (old->inf_id); |
| 1143 | if (inf != NULL) |
| 1144 | inf->removable = old->was_removable; |
| 1145 | xfree (old); |
| 1146 | } |
| 1147 | |
| 1148 | /* Set the thread reference count. */ |
| 1149 | |
| 1150 | static void |
| 1151 | set_thread_refcount (void *data) |
| 1152 | { |
| 1153 | int k; |
| 1154 | struct thread_array_cleanup *ta_cleanup = data; |
| 1155 | |
| 1156 | for (k = 0; k != ta_cleanup->count; k++) |
| 1157 | ta_cleanup->tp_array[k]->refcount--; |
| 1158 | } |
| 1159 | |
| 1160 | struct cleanup * |
| 1161 | make_cleanup_restore_current_thread (void) |
| 1162 | { |
| 1163 | struct thread_info *tp; |
| 1164 | struct frame_info *frame; |
| 1165 | struct current_thread_cleanup *old; |
| 1166 | |
| 1167 | old = xmalloc (sizeof (struct current_thread_cleanup)); |
| 1168 | old->inferior_ptid = inferior_ptid; |
| 1169 | old->inf_id = current_inferior ()->num; |
| 1170 | old->was_removable = current_inferior ()->removable; |
| 1171 | |
| 1172 | if (!ptid_equal (inferior_ptid, null_ptid)) |
| 1173 | { |
| 1174 | old->was_stopped = is_stopped (inferior_ptid); |
| 1175 | if (old->was_stopped |
| 1176 | && target_has_registers |
| 1177 | && target_has_stack |
| 1178 | && target_has_memory) |
| 1179 | { |
| 1180 | /* When processing internal events, there might not be a |
| 1181 | selected frame. If we naively call get_selected_frame |
| 1182 | here, then we can end up reading debuginfo for the |
| 1183 | current frame, but we don't generally need the debuginfo |
| 1184 | at this point. */ |
| 1185 | frame = get_selected_frame_if_set (); |
| 1186 | } |
| 1187 | else |
| 1188 | frame = NULL; |
| 1189 | |
| 1190 | old->selected_frame_id = get_frame_id (frame); |
| 1191 | old->selected_frame_level = frame_relative_level (frame); |
| 1192 | |
| 1193 | tp = find_thread_ptid (inferior_ptid); |
| 1194 | if (tp) |
| 1195 | tp->refcount++; |
| 1196 | } |
| 1197 | |
| 1198 | current_inferior ()->removable = 0; |
| 1199 | |
| 1200 | return make_cleanup_dtor (do_restore_current_thread_cleanup, old, |
| 1201 | restore_current_thread_cleanup_dtor); |
| 1202 | } |
| 1203 | |
| 1204 | /* Apply a GDB command to a list of threads. List syntax is a whitespace |
| 1205 | seperated list of numbers, or ranges, or the keyword `all'. Ranges consist |
| 1206 | of two numbers seperated by a hyphen. Examples: |
| 1207 | |
| 1208 | thread apply 1 2 7 4 backtrace Apply backtrace cmd to threads 1,2,7,4 |
| 1209 | thread apply 2-7 9 p foo(1) Apply p foo(1) cmd to threads 2->7 & 9 |
| 1210 | thread apply all p x/i $pc Apply x/i $pc cmd to all threads. */ |
| 1211 | |
| 1212 | static void |
| 1213 | thread_apply_all_command (char *cmd, int from_tty) |
| 1214 | { |
| 1215 | struct cleanup *old_chain; |
| 1216 | char *saved_cmd; |
| 1217 | int tc; |
| 1218 | struct thread_array_cleanup ta_cleanup; |
| 1219 | |
| 1220 | if (cmd == NULL || *cmd == '\000') |
| 1221 | error (_("Please specify a command following the thread ID list")); |
| 1222 | |
| 1223 | update_thread_list (); |
| 1224 | |
| 1225 | old_chain = make_cleanup_restore_current_thread (); |
| 1226 | |
| 1227 | /* Save a copy of the command in case it is clobbered by |
| 1228 | execute_command. */ |
| 1229 | saved_cmd = xstrdup (cmd); |
| 1230 | make_cleanup (xfree, saved_cmd); |
| 1231 | tc = thread_count (); |
| 1232 | |
| 1233 | if (tc) |
| 1234 | { |
| 1235 | struct thread_info **tp_array; |
| 1236 | struct thread_info *tp; |
| 1237 | int i = 0, k; |
| 1238 | |
| 1239 | /* Save a copy of the thread_list in case we execute detach |
| 1240 | command. */ |
| 1241 | tp_array = xmalloc (sizeof (struct thread_info *) * tc); |
| 1242 | make_cleanup (xfree, tp_array); |
| 1243 | ta_cleanup.tp_array = tp_array; |
| 1244 | ta_cleanup.count = tc; |
| 1245 | |
| 1246 | ALL_THREADS (tp) |
| 1247 | { |
| 1248 | tp_array[i] = tp; |
| 1249 | tp->refcount++; |
| 1250 | i++; |
| 1251 | } |
| 1252 | |
| 1253 | make_cleanup (set_thread_refcount, &ta_cleanup); |
| 1254 | |
| 1255 | for (k = 0; k != i; k++) |
| 1256 | if (thread_alive (tp_array[k])) |
| 1257 | { |
| 1258 | switch_to_thread (tp_array[k]->ptid); |
| 1259 | printf_filtered (_("\nThread %d (%s):\n"), |
| 1260 | tp_array[k]->num, |
| 1261 | target_pid_to_str (inferior_ptid)); |
| 1262 | execute_command (cmd, from_tty); |
| 1263 | |
| 1264 | /* Restore exact command used previously. */ |
| 1265 | strcpy (cmd, saved_cmd); |
| 1266 | } |
| 1267 | } |
| 1268 | |
| 1269 | do_cleanups (old_chain); |
| 1270 | } |
| 1271 | |
| 1272 | static void |
| 1273 | thread_apply_command (char *tidlist, int from_tty) |
| 1274 | { |
| 1275 | char *cmd; |
| 1276 | struct cleanup *old_chain; |
| 1277 | char *saved_cmd; |
| 1278 | struct get_number_or_range_state state; |
| 1279 | |
| 1280 | if (tidlist == NULL || *tidlist == '\000') |
| 1281 | error (_("Please specify a thread ID list")); |
| 1282 | |
| 1283 | for (cmd = tidlist; *cmd != '\000' && !isalpha (*cmd); cmd++); |
| 1284 | |
| 1285 | if (*cmd == '\000') |
| 1286 | error (_("Please specify a command following the thread ID list")); |
| 1287 | |
| 1288 | /* Save a copy of the command in case it is clobbered by |
| 1289 | execute_command. */ |
| 1290 | saved_cmd = xstrdup (cmd); |
| 1291 | old_chain = make_cleanup (xfree, saved_cmd); |
| 1292 | |
| 1293 | init_number_or_range (&state, tidlist); |
| 1294 | while (!state.finished && state.string < cmd) |
| 1295 | { |
| 1296 | struct thread_info *tp; |
| 1297 | int start; |
| 1298 | |
| 1299 | start = get_number_or_range (&state); |
| 1300 | |
| 1301 | make_cleanup_restore_current_thread (); |
| 1302 | |
| 1303 | tp = find_thread_id (start); |
| 1304 | |
| 1305 | if (!tp) |
| 1306 | warning (_("Unknown thread %d."), start); |
| 1307 | else if (!thread_alive (tp)) |
| 1308 | warning (_("Thread %d has terminated."), start); |
| 1309 | else |
| 1310 | { |
| 1311 | switch_to_thread (tp->ptid); |
| 1312 | |
| 1313 | printf_filtered (_("\nThread %d (%s):\n"), tp->num, |
| 1314 | target_pid_to_str (inferior_ptid)); |
| 1315 | execute_command (cmd, from_tty); |
| 1316 | |
| 1317 | /* Restore exact command used previously. */ |
| 1318 | strcpy (cmd, saved_cmd); |
| 1319 | } |
| 1320 | } |
| 1321 | |
| 1322 | do_cleanups (old_chain); |
| 1323 | } |
| 1324 | |
| 1325 | /* Switch to the specified thread. Will dispatch off to thread_apply_command |
| 1326 | if prefix of arg is `apply'. */ |
| 1327 | |
| 1328 | static void |
| 1329 | thread_command (char *tidstr, int from_tty) |
| 1330 | { |
| 1331 | if (!tidstr) |
| 1332 | { |
| 1333 | if (ptid_equal (inferior_ptid, null_ptid)) |
| 1334 | error (_("No thread selected")); |
| 1335 | |
| 1336 | if (target_has_stack) |
| 1337 | { |
| 1338 | if (is_exited (inferior_ptid)) |
| 1339 | printf_filtered (_("[Current thread is %d (%s) (exited)]\n"), |
| 1340 | pid_to_thread_id (inferior_ptid), |
| 1341 | target_pid_to_str (inferior_ptid)); |
| 1342 | else |
| 1343 | printf_filtered (_("[Current thread is %d (%s)]\n"), |
| 1344 | pid_to_thread_id (inferior_ptid), |
| 1345 | target_pid_to_str (inferior_ptid)); |
| 1346 | } |
| 1347 | else |
| 1348 | error (_("No stack.")); |
| 1349 | return; |
| 1350 | } |
| 1351 | |
| 1352 | gdb_thread_select (current_uiout, tidstr, NULL); |
| 1353 | } |
| 1354 | |
| 1355 | /* Implementation of `thread name'. */ |
| 1356 | |
| 1357 | static void |
| 1358 | thread_name_command (char *arg, int from_tty) |
| 1359 | { |
| 1360 | struct thread_info *info; |
| 1361 | |
| 1362 | if (ptid_equal (inferior_ptid, null_ptid)) |
| 1363 | error (_("No thread selected")); |
| 1364 | |
| 1365 | arg = skip_spaces (arg); |
| 1366 | |
| 1367 | info = inferior_thread (); |
| 1368 | xfree (info->name); |
| 1369 | info->name = arg ? xstrdup (arg) : NULL; |
| 1370 | } |
| 1371 | |
| 1372 | /* Find thread ids with a name, target pid, or extra info matching ARG. */ |
| 1373 | |
| 1374 | static void |
| 1375 | thread_find_command (char *arg, int from_tty) |
| 1376 | { |
| 1377 | struct thread_info *tp; |
| 1378 | char *tmp; |
| 1379 | unsigned long match = 0; |
| 1380 | |
| 1381 | if (arg == NULL || *arg == '\0') |
| 1382 | error (_("Command requires an argument.")); |
| 1383 | |
| 1384 | tmp = re_comp (arg); |
| 1385 | if (tmp != 0) |
| 1386 | error (_("Invalid regexp (%s): %s"), tmp, arg); |
| 1387 | |
| 1388 | update_thread_list (); |
| 1389 | for (tp = thread_list; tp; tp = tp->next) |
| 1390 | { |
| 1391 | if (tp->name != NULL && re_exec (tp->name)) |
| 1392 | { |
| 1393 | printf_filtered (_("Thread %d has name '%s'\n"), |
| 1394 | tp->num, tp->name); |
| 1395 | match++; |
| 1396 | } |
| 1397 | |
| 1398 | tmp = target_thread_name (tp); |
| 1399 | if (tmp != NULL && re_exec (tmp)) |
| 1400 | { |
| 1401 | printf_filtered (_("Thread %d has target name '%s'\n"), |
| 1402 | tp->num, tmp); |
| 1403 | match++; |
| 1404 | } |
| 1405 | |
| 1406 | tmp = target_pid_to_str (tp->ptid); |
| 1407 | if (tmp != NULL && re_exec (tmp)) |
| 1408 | { |
| 1409 | printf_filtered (_("Thread %d has target id '%s'\n"), |
| 1410 | tp->num, tmp); |
| 1411 | match++; |
| 1412 | } |
| 1413 | |
| 1414 | tmp = target_extra_thread_info (tp); |
| 1415 | if (tmp != NULL && re_exec (tmp)) |
| 1416 | { |
| 1417 | printf_filtered (_("Thread %d has extra info '%s'\n"), |
| 1418 | tp->num, tmp); |
| 1419 | match++; |
| 1420 | } |
| 1421 | } |
| 1422 | if (!match) |
| 1423 | printf_filtered (_("No threads match '%s'\n"), arg); |
| 1424 | } |
| 1425 | |
| 1426 | /* Print notices when new threads are attached and detached. */ |
| 1427 | int print_thread_events = 1; |
| 1428 | static void |
| 1429 | show_print_thread_events (struct ui_file *file, int from_tty, |
| 1430 | struct cmd_list_element *c, const char *value) |
| 1431 | { |
| 1432 | fprintf_filtered (file, |
| 1433 | _("Printing of thread events is %s.\n"), |
| 1434 | value); |
| 1435 | } |
| 1436 | |
| 1437 | static int |
| 1438 | do_captured_thread_select (struct ui_out *uiout, void *tidstr) |
| 1439 | { |
| 1440 | int num; |
| 1441 | struct thread_info *tp; |
| 1442 | |
| 1443 | num = value_as_long (parse_and_eval (tidstr)); |
| 1444 | |
| 1445 | tp = find_thread_id (num); |
| 1446 | |
| 1447 | if (!tp) |
| 1448 | error (_("Thread ID %d not known."), num); |
| 1449 | |
| 1450 | if (!thread_alive (tp)) |
| 1451 | error (_("Thread ID %d has terminated."), num); |
| 1452 | |
| 1453 | switch_to_thread (tp->ptid); |
| 1454 | |
| 1455 | annotate_thread_changed (); |
| 1456 | |
| 1457 | ui_out_text (uiout, "[Switching to thread "); |
| 1458 | ui_out_field_int (uiout, "new-thread-id", pid_to_thread_id (inferior_ptid)); |
| 1459 | ui_out_text (uiout, " ("); |
| 1460 | ui_out_text (uiout, target_pid_to_str (inferior_ptid)); |
| 1461 | ui_out_text (uiout, ")]"); |
| 1462 | |
| 1463 | /* Note that we can't reach this with an exited thread, due to the |
| 1464 | thread_alive check above. */ |
| 1465 | if (tp->state == THREAD_RUNNING) |
| 1466 | ui_out_text (uiout, "(running)\n"); |
| 1467 | else |
| 1468 | { |
| 1469 | ui_out_text (uiout, "\n"); |
| 1470 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
| 1471 | } |
| 1472 | |
| 1473 | /* Since the current thread may have changed, see if there is any |
| 1474 | exited thread we can now delete. */ |
| 1475 | prune_threads (); |
| 1476 | |
| 1477 | return GDB_RC_OK; |
| 1478 | } |
| 1479 | |
| 1480 | enum gdb_rc |
| 1481 | gdb_thread_select (struct ui_out *uiout, char *tidstr, char **error_message) |
| 1482 | { |
| 1483 | if (catch_exceptions_with_msg (uiout, do_captured_thread_select, tidstr, |
| 1484 | error_message, RETURN_MASK_ALL) < 0) |
| 1485 | return GDB_RC_FAIL; |
| 1486 | return GDB_RC_OK; |
| 1487 | } |
| 1488 | |
| 1489 | void |
| 1490 | update_thread_list (void) |
| 1491 | { |
| 1492 | prune_threads (); |
| 1493 | target_find_new_threads (); |
| 1494 | } |
| 1495 | |
| 1496 | /* Return a new value for the selected thread's id. Return a value of 0 if |
| 1497 | no thread is selected, or no threads exist. */ |
| 1498 | |
| 1499 | static struct value * |
| 1500 | thread_id_make_value (struct gdbarch *gdbarch, struct internalvar *var, |
| 1501 | void *ignore) |
| 1502 | { |
| 1503 | struct thread_info *tp = find_thread_ptid (inferior_ptid); |
| 1504 | |
| 1505 | return value_from_longest (builtin_type (gdbarch)->builtin_int, |
| 1506 | (tp ? tp->num : 0)); |
| 1507 | } |
| 1508 | |
| 1509 | /* Commands with a prefix of `thread'. */ |
| 1510 | struct cmd_list_element *thread_cmd_list = NULL; |
| 1511 | |
| 1512 | /* Implementation of `thread' variable. */ |
| 1513 | |
| 1514 | static const struct internalvar_funcs thread_funcs = |
| 1515 | { |
| 1516 | thread_id_make_value, |
| 1517 | NULL, |
| 1518 | NULL |
| 1519 | }; |
| 1520 | |
| 1521 | void |
| 1522 | _initialize_thread (void) |
| 1523 | { |
| 1524 | static struct cmd_list_element *thread_apply_list = NULL; |
| 1525 | |
| 1526 | add_info ("threads", info_threads_command, |
| 1527 | _("Display currently known threads.\n\ |
| 1528 | Usage: info threads [ID]...\n\ |
| 1529 | Optional arguments are thread IDs with spaces between.\n\ |
| 1530 | If no arguments, all threads are displayed.")); |
| 1531 | |
| 1532 | add_prefix_cmd ("thread", class_run, thread_command, _("\ |
| 1533 | Use this command to switch between threads.\n\ |
| 1534 | The new thread ID must be currently known."), |
| 1535 | &thread_cmd_list, "thread ", 1, &cmdlist); |
| 1536 | |
| 1537 | add_prefix_cmd ("apply", class_run, thread_apply_command, |
| 1538 | _("Apply a command to a list of threads."), |
| 1539 | &thread_apply_list, "thread apply ", 1, &thread_cmd_list); |
| 1540 | |
| 1541 | add_cmd ("all", class_run, thread_apply_all_command, |
| 1542 | _("Apply a command to all threads."), &thread_apply_list); |
| 1543 | |
| 1544 | add_cmd ("name", class_run, thread_name_command, |
| 1545 | _("Set the current thread's name.\n\ |
| 1546 | Usage: thread name [NAME]\n\ |
| 1547 | If NAME is not given, then any existing name is removed."), &thread_cmd_list); |
| 1548 | |
| 1549 | add_cmd ("find", class_run, thread_find_command, _("\ |
| 1550 | Find threads that match a regular expression.\n\ |
| 1551 | Usage: thread find REGEXP\n\ |
| 1552 | Will display thread ids whose name, target ID, or extra info matches REGEXP."), |
| 1553 | &thread_cmd_list); |
| 1554 | |
| 1555 | if (!xdb_commands) |
| 1556 | add_com_alias ("t", "thread", class_run, 1); |
| 1557 | |
| 1558 | add_setshow_boolean_cmd ("thread-events", no_class, |
| 1559 | &print_thread_events, _("\ |
| 1560 | Set printing of thread events (such as thread start and exit)."), _("\ |
| 1561 | Show printing of thread events (such as thread start and exit)."), NULL, |
| 1562 | NULL, |
| 1563 | show_print_thread_events, |
| 1564 | &setprintlist, &showprintlist); |
| 1565 | |
| 1566 | create_internalvar_type_lazy ("_thread", &thread_funcs, NULL); |
| 1567 | } |