| 1 | /* Multi-process/thread control for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright 1986, 1987, 1988, 1993, 1994, 1995, 1996, 1997, 1998, |
| 4 | 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc. |
| 5 | |
| 6 | Contributed by Lynx Real-Time Systems, Inc. Los Gatos, CA. |
| 7 | |
| 8 | This file is part of GDB. |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation; either version 2 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program; if not, write to the Free Software |
| 22 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 23 | Boston, MA 02111-1307, USA. */ |
| 24 | |
| 25 | #include "defs.h" |
| 26 | #include "symtab.h" |
| 27 | #include "frame.h" |
| 28 | #include "inferior.h" |
| 29 | #include "environ.h" |
| 30 | #include "value.h" |
| 31 | #include "target.h" |
| 32 | #include "gdbthread.h" |
| 33 | #include "exceptions.h" |
| 34 | #include "command.h" |
| 35 | #include "gdbcmd.h" |
| 36 | #include "regcache.h" |
| 37 | #include "gdb.h" |
| 38 | #include "gdb_string.h" |
| 39 | |
| 40 | #include <ctype.h> |
| 41 | #include <sys/types.h> |
| 42 | #include <signal.h> |
| 43 | #include "ui-out.h" |
| 44 | |
| 45 | /*#include "lynxos-core.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 | static struct thread_info *thread_list = NULL; |
| 56 | static int highest_thread_num; |
| 57 | |
| 58 | static struct thread_info *find_thread_id (int 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 switch_to_thread (ptid_t ptid); |
| 67 | static void prune_threads (void); |
| 68 | |
| 69 | void |
| 70 | delete_step_resume_breakpoint (void *arg) |
| 71 | { |
| 72 | struct breakpoint **breakpointp = (struct breakpoint **) arg; |
| 73 | struct thread_info *tp; |
| 74 | |
| 75 | if (*breakpointp != NULL) |
| 76 | { |
| 77 | delete_breakpoint (*breakpointp); |
| 78 | for (tp = thread_list; tp; tp = tp->next) |
| 79 | if (tp->step_resume_breakpoint == *breakpointp) |
| 80 | tp->step_resume_breakpoint = NULL; |
| 81 | |
| 82 | *breakpointp = NULL; |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | static void |
| 87 | free_thread (struct thread_info *tp) |
| 88 | { |
| 89 | /* NOTE: this will take care of any left-over step_resume breakpoints, |
| 90 | but not any user-specified thread-specific breakpoints. */ |
| 91 | if (tp->step_resume_breakpoint) |
| 92 | delete_breakpoint (tp->step_resume_breakpoint); |
| 93 | |
| 94 | /* FIXME: do I ever need to call the back-end to give it a |
| 95 | chance at this private data before deleting the thread? */ |
| 96 | if (tp->private) |
| 97 | xfree (tp->private); |
| 98 | |
| 99 | xfree (tp); |
| 100 | } |
| 101 | |
| 102 | void |
| 103 | init_thread_list (void) |
| 104 | { |
| 105 | struct thread_info *tp, *tpnext; |
| 106 | |
| 107 | highest_thread_num = 0; |
| 108 | if (!thread_list) |
| 109 | return; |
| 110 | |
| 111 | for (tp = thread_list; tp; tp = tpnext) |
| 112 | { |
| 113 | tpnext = tp->next; |
| 114 | free_thread (tp); |
| 115 | } |
| 116 | |
| 117 | thread_list = NULL; |
| 118 | } |
| 119 | |
| 120 | /* add_thread now returns a pointer to the new thread_info, |
| 121 | so that back_ends can initialize their private data. */ |
| 122 | |
| 123 | struct thread_info * |
| 124 | add_thread (ptid_t ptid) |
| 125 | { |
| 126 | struct thread_info *tp; |
| 127 | |
| 128 | tp = (struct thread_info *) xmalloc (sizeof (*tp)); |
| 129 | memset (tp, 0, sizeof (*tp)); |
| 130 | tp->ptid = ptid; |
| 131 | tp->num = ++highest_thread_num; |
| 132 | tp->next = thread_list; |
| 133 | thread_list = tp; |
| 134 | return tp; |
| 135 | } |
| 136 | |
| 137 | void |
| 138 | delete_thread (ptid_t ptid) |
| 139 | { |
| 140 | struct thread_info *tp, *tpprev; |
| 141 | |
| 142 | tpprev = NULL; |
| 143 | |
| 144 | for (tp = thread_list; tp; tpprev = tp, tp = tp->next) |
| 145 | if (ptid_equal (tp->ptid, ptid)) |
| 146 | break; |
| 147 | |
| 148 | if (!tp) |
| 149 | return; |
| 150 | |
| 151 | if (tpprev) |
| 152 | tpprev->next = tp->next; |
| 153 | else |
| 154 | thread_list = tp->next; |
| 155 | |
| 156 | free_thread (tp); |
| 157 | } |
| 158 | |
| 159 | static struct thread_info * |
| 160 | find_thread_id (int num) |
| 161 | { |
| 162 | struct thread_info *tp; |
| 163 | |
| 164 | for (tp = thread_list; tp; tp = tp->next) |
| 165 | if (tp->num == num) |
| 166 | return tp; |
| 167 | |
| 168 | return NULL; |
| 169 | } |
| 170 | |
| 171 | /* Find a thread_info by matching PTID. */ |
| 172 | struct thread_info * |
| 173 | find_thread_pid (ptid_t ptid) |
| 174 | { |
| 175 | struct thread_info *tp; |
| 176 | |
| 177 | for (tp = thread_list; tp; tp = tp->next) |
| 178 | if (ptid_equal (tp->ptid, ptid)) |
| 179 | return tp; |
| 180 | |
| 181 | return NULL; |
| 182 | } |
| 183 | |
| 184 | /* |
| 185 | * Thread iterator function. |
| 186 | * |
| 187 | * Calls a callback function once for each thread, so long as |
| 188 | * the callback function returns false. If the callback function |
| 189 | * returns true, the iteration will end and the current thread |
| 190 | * will be returned. This can be useful for implementing a |
| 191 | * search for a thread with arbitrary attributes, or for applying |
| 192 | * some operation to every thread. |
| 193 | * |
| 194 | * FIXME: some of the existing functionality, such as |
| 195 | * "Thread apply all", might be rewritten using this functionality. |
| 196 | */ |
| 197 | |
| 198 | struct thread_info * |
| 199 | iterate_over_threads (int (*callback) (struct thread_info *, void *), |
| 200 | void *data) |
| 201 | { |
| 202 | struct thread_info *tp; |
| 203 | |
| 204 | for (tp = thread_list; tp; tp = tp->next) |
| 205 | if ((*callback) (tp, data)) |
| 206 | return tp; |
| 207 | |
| 208 | return NULL; |
| 209 | } |
| 210 | |
| 211 | int |
| 212 | valid_thread_id (int num) |
| 213 | { |
| 214 | struct thread_info *tp; |
| 215 | |
| 216 | for (tp = thread_list; tp; tp = tp->next) |
| 217 | if (tp->num == num) |
| 218 | return 1; |
| 219 | |
| 220 | return 0; |
| 221 | } |
| 222 | |
| 223 | int |
| 224 | pid_to_thread_id (ptid_t ptid) |
| 225 | { |
| 226 | struct thread_info *tp; |
| 227 | |
| 228 | for (tp = thread_list; tp; tp = tp->next) |
| 229 | if (ptid_equal (tp->ptid, ptid)) |
| 230 | return tp->num; |
| 231 | |
| 232 | return 0; |
| 233 | } |
| 234 | |
| 235 | ptid_t |
| 236 | thread_id_to_pid (int num) |
| 237 | { |
| 238 | struct thread_info *thread = find_thread_id (num); |
| 239 | if (thread) |
| 240 | return thread->ptid; |
| 241 | else |
| 242 | return pid_to_ptid (-1); |
| 243 | } |
| 244 | |
| 245 | int |
| 246 | in_thread_list (ptid_t ptid) |
| 247 | { |
| 248 | struct thread_info *tp; |
| 249 | |
| 250 | for (tp = thread_list; tp; tp = tp->next) |
| 251 | if (ptid_equal (tp->ptid, ptid)) |
| 252 | return 1; |
| 253 | |
| 254 | return 0; /* Never heard of 'im */ |
| 255 | } |
| 256 | |
| 257 | /* Print a list of thread ids currently known, and the total number of |
| 258 | threads. To be used from within catch_errors. */ |
| 259 | static int |
| 260 | do_captured_list_thread_ids (struct ui_out *uiout, void *arg) |
| 261 | { |
| 262 | struct thread_info *tp; |
| 263 | int num = 0; |
| 264 | struct cleanup *cleanup_chain; |
| 265 | |
| 266 | prune_threads (); |
| 267 | target_find_new_threads (); |
| 268 | |
| 269 | cleanup_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "thread-ids"); |
| 270 | |
| 271 | for (tp = thread_list; tp; tp = tp->next) |
| 272 | { |
| 273 | num++; |
| 274 | ui_out_field_int (uiout, "thread-id", tp->num); |
| 275 | } |
| 276 | |
| 277 | do_cleanups (cleanup_chain); |
| 278 | ui_out_field_int (uiout, "number-of-threads", num); |
| 279 | return GDB_RC_OK; |
| 280 | } |
| 281 | |
| 282 | /* Official gdblib interface function to get a list of thread ids and |
| 283 | the total number. */ |
| 284 | enum gdb_rc |
| 285 | gdb_list_thread_ids (struct ui_out *uiout, char **error_message) |
| 286 | { |
| 287 | return catch_exceptions_with_msg (uiout, do_captured_list_thread_ids, NULL, |
| 288 | error_message, RETURN_MASK_ALL); |
| 289 | } |
| 290 | |
| 291 | /* Load infrun state for the thread PID. */ |
| 292 | |
| 293 | void |
| 294 | load_infrun_state (ptid_t ptid, |
| 295 | CORE_ADDR *prev_pc, |
| 296 | int *trap_expected, |
| 297 | struct breakpoint **step_resume_breakpoint, |
| 298 | CORE_ADDR *step_range_start, |
| 299 | CORE_ADDR *step_range_end, |
| 300 | struct frame_id *step_frame_id, |
| 301 | int *handling_longjmp, |
| 302 | int *another_trap, |
| 303 | int *stepping_through_solib_after_catch, |
| 304 | bpstat *stepping_through_solib_catchpoints, |
| 305 | int *current_line, |
| 306 | struct symtab **current_symtab) |
| 307 | { |
| 308 | struct thread_info *tp; |
| 309 | |
| 310 | /* If we can't find the thread, then we're debugging a single threaded |
| 311 | process. No need to do anything in that case. */ |
| 312 | tp = find_thread_id (pid_to_thread_id (ptid)); |
| 313 | if (tp == NULL) |
| 314 | return; |
| 315 | |
| 316 | *prev_pc = tp->prev_pc; |
| 317 | *trap_expected = tp->trap_expected; |
| 318 | *step_resume_breakpoint = tp->step_resume_breakpoint; |
| 319 | *step_range_start = tp->step_range_start; |
| 320 | *step_range_end = tp->step_range_end; |
| 321 | *step_frame_id = tp->step_frame_id; |
| 322 | *handling_longjmp = tp->handling_longjmp; |
| 323 | *another_trap = tp->another_trap; |
| 324 | *stepping_through_solib_after_catch = |
| 325 | tp->stepping_through_solib_after_catch; |
| 326 | *stepping_through_solib_catchpoints = |
| 327 | tp->stepping_through_solib_catchpoints; |
| 328 | *current_line = tp->current_line; |
| 329 | *current_symtab = tp->current_symtab; |
| 330 | } |
| 331 | |
| 332 | /* Save infrun state for the thread PID. */ |
| 333 | |
| 334 | void |
| 335 | save_infrun_state (ptid_t ptid, |
| 336 | CORE_ADDR prev_pc, |
| 337 | int trap_expected, |
| 338 | struct breakpoint *step_resume_breakpoint, |
| 339 | CORE_ADDR step_range_start, |
| 340 | CORE_ADDR step_range_end, |
| 341 | const struct frame_id *step_frame_id, |
| 342 | int handling_longjmp, |
| 343 | int another_trap, |
| 344 | int stepping_through_solib_after_catch, |
| 345 | bpstat stepping_through_solib_catchpoints, |
| 346 | int current_line, |
| 347 | struct symtab *current_symtab) |
| 348 | { |
| 349 | struct thread_info *tp; |
| 350 | |
| 351 | /* If we can't find the thread, then we're debugging a single-threaded |
| 352 | process. Nothing to do in that case. */ |
| 353 | tp = find_thread_id (pid_to_thread_id (ptid)); |
| 354 | if (tp == NULL) |
| 355 | return; |
| 356 | |
| 357 | tp->prev_pc = prev_pc; |
| 358 | tp->trap_expected = trap_expected; |
| 359 | tp->step_resume_breakpoint = step_resume_breakpoint; |
| 360 | tp->step_range_start = step_range_start; |
| 361 | tp->step_range_end = step_range_end; |
| 362 | tp->step_frame_id = (*step_frame_id); |
| 363 | tp->handling_longjmp = handling_longjmp; |
| 364 | tp->another_trap = another_trap; |
| 365 | tp->stepping_through_solib_after_catch = stepping_through_solib_after_catch; |
| 366 | tp->stepping_through_solib_catchpoints = stepping_through_solib_catchpoints; |
| 367 | tp->current_line = current_line; |
| 368 | tp->current_symtab = current_symtab; |
| 369 | } |
| 370 | |
| 371 | /* Return true if TP is an active thread. */ |
| 372 | static int |
| 373 | thread_alive (struct thread_info *tp) |
| 374 | { |
| 375 | if (PIDGET (tp->ptid) == -1) |
| 376 | return 0; |
| 377 | if (!target_thread_alive (tp->ptid)) |
| 378 | { |
| 379 | tp->ptid = pid_to_ptid (-1); /* Mark it as dead */ |
| 380 | return 0; |
| 381 | } |
| 382 | return 1; |
| 383 | } |
| 384 | |
| 385 | static void |
| 386 | prune_threads (void) |
| 387 | { |
| 388 | struct thread_info *tp, *next; |
| 389 | |
| 390 | for (tp = thread_list; tp; tp = next) |
| 391 | { |
| 392 | next = tp->next; |
| 393 | if (!thread_alive (tp)) |
| 394 | delete_thread (tp->ptid); |
| 395 | } |
| 396 | } |
| 397 | |
| 398 | /* Print information about currently known threads |
| 399 | |
| 400 | * Note: this has the drawback that it _really_ switches |
| 401 | * threads, which frees the frame cache. A no-side |
| 402 | * effects info-threads command would be nicer. |
| 403 | */ |
| 404 | |
| 405 | static void |
| 406 | info_threads_command (char *arg, int from_tty) |
| 407 | { |
| 408 | struct thread_info *tp; |
| 409 | ptid_t current_ptid; |
| 410 | struct frame_info *cur_frame; |
| 411 | struct frame_id saved_frame_id = get_frame_id (get_selected_frame (NULL)); |
| 412 | char *extra_info; |
| 413 | |
| 414 | prune_threads (); |
| 415 | target_find_new_threads (); |
| 416 | current_ptid = inferior_ptid; |
| 417 | for (tp = thread_list; tp; tp = tp->next) |
| 418 | { |
| 419 | if (ptid_equal (tp->ptid, current_ptid)) |
| 420 | printf_filtered ("* "); |
| 421 | else |
| 422 | printf_filtered (" "); |
| 423 | |
| 424 | printf_filtered ("%d %s", tp->num, target_tid_to_str (tp->ptid)); |
| 425 | |
| 426 | extra_info = target_extra_thread_info (tp); |
| 427 | if (extra_info) |
| 428 | printf_filtered (" (%s)", extra_info); |
| 429 | puts_filtered (" "); |
| 430 | |
| 431 | switch_to_thread (tp->ptid); |
| 432 | print_stack_frame (get_selected_frame (NULL), 0, LOCATION); |
| 433 | } |
| 434 | |
| 435 | switch_to_thread (current_ptid); |
| 436 | |
| 437 | /* Restores the frame set by the user before the "info threads" |
| 438 | command. We have finished the info-threads display by switching |
| 439 | back to the current thread. That switch has put us at the top of |
| 440 | the stack (leaf frame). */ |
| 441 | cur_frame = frame_find_by_id (saved_frame_id); |
| 442 | if (cur_frame == NULL) |
| 443 | { |
| 444 | /* Ooops, can't restore, tell user where we are. */ |
| 445 | warning (_("Couldn't restore frame in current thread, at frame 0")); |
| 446 | print_stack_frame (get_selected_frame (NULL), 0, LOCATION); |
| 447 | } |
| 448 | else |
| 449 | { |
| 450 | select_frame (cur_frame); |
| 451 | /* re-show current frame. */ |
| 452 | show_stack_frame (cur_frame); |
| 453 | } |
| 454 | } |
| 455 | |
| 456 | /* Switch from one thread to another. */ |
| 457 | |
| 458 | static void |
| 459 | switch_to_thread (ptid_t ptid) |
| 460 | { |
| 461 | if (ptid_equal (ptid, inferior_ptid)) |
| 462 | return; |
| 463 | |
| 464 | inferior_ptid = ptid; |
| 465 | flush_cached_frames (); |
| 466 | registers_changed (); |
| 467 | stop_pc = read_pc (); |
| 468 | select_frame (get_current_frame ()); |
| 469 | } |
| 470 | |
| 471 | static void |
| 472 | restore_current_thread (ptid_t ptid) |
| 473 | { |
| 474 | if (!ptid_equal (ptid, inferior_ptid)) |
| 475 | { |
| 476 | switch_to_thread (ptid); |
| 477 | print_stack_frame (get_current_frame (), 1, SRC_LINE); |
| 478 | } |
| 479 | } |
| 480 | |
| 481 | struct current_thread_cleanup |
| 482 | { |
| 483 | ptid_t inferior_ptid; |
| 484 | }; |
| 485 | |
| 486 | static void |
| 487 | do_restore_current_thread_cleanup (void *arg) |
| 488 | { |
| 489 | struct current_thread_cleanup *old = arg; |
| 490 | restore_current_thread (old->inferior_ptid); |
| 491 | xfree (old); |
| 492 | } |
| 493 | |
| 494 | static struct cleanup * |
| 495 | make_cleanup_restore_current_thread (ptid_t inferior_ptid) |
| 496 | { |
| 497 | struct current_thread_cleanup *old |
| 498 | = xmalloc (sizeof (struct current_thread_cleanup)); |
| 499 | old->inferior_ptid = inferior_ptid; |
| 500 | return make_cleanup (do_restore_current_thread_cleanup, old); |
| 501 | } |
| 502 | |
| 503 | /* Apply a GDB command to a list of threads. List syntax is a whitespace |
| 504 | seperated list of numbers, or ranges, or the keyword `all'. Ranges consist |
| 505 | of two numbers seperated by a hyphen. Examples: |
| 506 | |
| 507 | thread apply 1 2 7 4 backtrace Apply backtrace cmd to threads 1,2,7,4 |
| 508 | thread apply 2-7 9 p foo(1) Apply p foo(1) cmd to threads 2->7 & 9 |
| 509 | thread apply all p x/i $pc Apply x/i $pc cmd to all threads |
| 510 | */ |
| 511 | |
| 512 | static void |
| 513 | thread_apply_all_command (char *cmd, int from_tty) |
| 514 | { |
| 515 | struct thread_info *tp; |
| 516 | struct cleanup *old_chain; |
| 517 | struct cleanup *saved_cmd_cleanup_chain; |
| 518 | char *saved_cmd; |
| 519 | |
| 520 | if (cmd == NULL || *cmd == '\000') |
| 521 | error (_("Please specify a command following the thread ID list")); |
| 522 | |
| 523 | old_chain = make_cleanup_restore_current_thread (inferior_ptid); |
| 524 | |
| 525 | /* It is safe to update the thread list now, before |
| 526 | traversing it for "thread apply all". MVS */ |
| 527 | target_find_new_threads (); |
| 528 | |
| 529 | /* Save a copy of the command in case it is clobbered by |
| 530 | execute_command */ |
| 531 | saved_cmd = xstrdup (cmd); |
| 532 | saved_cmd_cleanup_chain = make_cleanup (xfree, (void *) saved_cmd); |
| 533 | for (tp = thread_list; tp; tp = tp->next) |
| 534 | if (thread_alive (tp)) |
| 535 | { |
| 536 | switch_to_thread (tp->ptid); |
| 537 | printf_filtered (_("\nThread %d (%s):\n"), |
| 538 | tp->num, target_tid_to_str (inferior_ptid)); |
| 539 | execute_command (cmd, from_tty); |
| 540 | strcpy (cmd, saved_cmd); /* Restore exact command used previously */ |
| 541 | } |
| 542 | |
| 543 | do_cleanups (saved_cmd_cleanup_chain); |
| 544 | do_cleanups (old_chain); |
| 545 | } |
| 546 | |
| 547 | static void |
| 548 | thread_apply_command (char *tidlist, int from_tty) |
| 549 | { |
| 550 | char *cmd; |
| 551 | char *p; |
| 552 | struct cleanup *old_chain; |
| 553 | struct cleanup *saved_cmd_cleanup_chain; |
| 554 | char *saved_cmd; |
| 555 | |
| 556 | if (tidlist == NULL || *tidlist == '\000') |
| 557 | error (_("Please specify a thread ID list")); |
| 558 | |
| 559 | for (cmd = tidlist; *cmd != '\000' && !isalpha (*cmd); cmd++); |
| 560 | |
| 561 | if (*cmd == '\000') |
| 562 | error (_("Please specify a command following the thread ID list")); |
| 563 | |
| 564 | old_chain = make_cleanup_restore_current_thread (inferior_ptid); |
| 565 | |
| 566 | /* Save a copy of the command in case it is clobbered by |
| 567 | execute_command */ |
| 568 | saved_cmd = xstrdup (cmd); |
| 569 | saved_cmd_cleanup_chain = make_cleanup (xfree, (void *) saved_cmd); |
| 570 | while (tidlist < cmd) |
| 571 | { |
| 572 | struct thread_info *tp; |
| 573 | int start, end; |
| 574 | |
| 575 | start = strtol (tidlist, &p, 10); |
| 576 | if (p == tidlist) |
| 577 | error (_("Error parsing %s"), tidlist); |
| 578 | tidlist = p; |
| 579 | |
| 580 | while (*tidlist == ' ' || *tidlist == '\t') |
| 581 | tidlist++; |
| 582 | |
| 583 | if (*tidlist == '-') /* Got a range of IDs? */ |
| 584 | { |
| 585 | tidlist++; /* Skip the - */ |
| 586 | end = strtol (tidlist, &p, 10); |
| 587 | if (p == tidlist) |
| 588 | error (_("Error parsing %s"), tidlist); |
| 589 | tidlist = p; |
| 590 | |
| 591 | while (*tidlist == ' ' || *tidlist == '\t') |
| 592 | tidlist++; |
| 593 | } |
| 594 | else |
| 595 | end = start; |
| 596 | |
| 597 | for (; start <= end; start++) |
| 598 | { |
| 599 | tp = find_thread_id (start); |
| 600 | |
| 601 | if (!tp) |
| 602 | warning (_("Unknown thread %d."), start); |
| 603 | else if (!thread_alive (tp)) |
| 604 | warning (_("Thread %d has terminated."), start); |
| 605 | else |
| 606 | { |
| 607 | switch_to_thread (tp->ptid); |
| 608 | printf_filtered (_("\nThread %d (%s):\n"), tp->num, |
| 609 | target_tid_to_str (inferior_ptid)); |
| 610 | execute_command (cmd, from_tty); |
| 611 | strcpy (cmd, saved_cmd); /* Restore exact command used previously */ |
| 612 | } |
| 613 | } |
| 614 | } |
| 615 | |
| 616 | do_cleanups (saved_cmd_cleanup_chain); |
| 617 | do_cleanups (old_chain); |
| 618 | } |
| 619 | |
| 620 | /* Switch to the specified thread. Will dispatch off to thread_apply_command |
| 621 | if prefix of arg is `apply'. */ |
| 622 | |
| 623 | static void |
| 624 | thread_command (char *tidstr, int from_tty) |
| 625 | { |
| 626 | if (!tidstr) |
| 627 | { |
| 628 | /* Don't generate an error, just say which thread is current. */ |
| 629 | if (target_has_stack) |
| 630 | printf_filtered (_("[Current thread is %d (%s)]\n"), |
| 631 | pid_to_thread_id (inferior_ptid), |
| 632 | target_tid_to_str (inferior_ptid)); |
| 633 | else |
| 634 | error (_("No stack.")); |
| 635 | return; |
| 636 | } |
| 637 | |
| 638 | gdb_thread_select (uiout, tidstr, NULL); |
| 639 | } |
| 640 | |
| 641 | static int |
| 642 | do_captured_thread_select (struct ui_out *uiout, void *tidstr) |
| 643 | { |
| 644 | int num; |
| 645 | struct thread_info *tp; |
| 646 | |
| 647 | num = value_as_long (parse_and_eval (tidstr)); |
| 648 | |
| 649 | tp = find_thread_id (num); |
| 650 | |
| 651 | if (!tp) |
| 652 | error (_("Thread ID %d not known."), num); |
| 653 | |
| 654 | if (!thread_alive (tp)) |
| 655 | error (_("Thread ID %d has terminated."), num); |
| 656 | |
| 657 | switch_to_thread (tp->ptid); |
| 658 | |
| 659 | ui_out_text (uiout, "[Switching to thread "); |
| 660 | ui_out_field_int (uiout, "new-thread-id", pid_to_thread_id (inferior_ptid)); |
| 661 | ui_out_text (uiout, " ("); |
| 662 | ui_out_text (uiout, target_tid_to_str (inferior_ptid)); |
| 663 | ui_out_text (uiout, ")]"); |
| 664 | |
| 665 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); |
| 666 | return GDB_RC_OK; |
| 667 | } |
| 668 | |
| 669 | enum gdb_rc |
| 670 | gdb_thread_select (struct ui_out *uiout, char *tidstr, char **error_message) |
| 671 | { |
| 672 | return catch_exceptions_with_msg (uiout, do_captured_thread_select, tidstr, |
| 673 | error_message, RETURN_MASK_ALL); |
| 674 | } |
| 675 | |
| 676 | /* Commands with a prefix of `thread'. */ |
| 677 | struct cmd_list_element *thread_cmd_list = NULL; |
| 678 | |
| 679 | void |
| 680 | _initialize_thread (void) |
| 681 | { |
| 682 | static struct cmd_list_element *thread_apply_list = NULL; |
| 683 | |
| 684 | add_info ("threads", info_threads_command, |
| 685 | _("IDs of currently known threads.")); |
| 686 | |
| 687 | add_prefix_cmd ("thread", class_run, thread_command, _("\ |
| 688 | Use this command to switch between threads.\n\ |
| 689 | The new thread ID must be currently known."), |
| 690 | &thread_cmd_list, "thread ", 1, &cmdlist); |
| 691 | |
| 692 | add_prefix_cmd ("apply", class_run, thread_apply_command, |
| 693 | _("Apply a command to a list of threads."), |
| 694 | &thread_apply_list, "apply ", 1, &thread_cmd_list); |
| 695 | |
| 696 | add_cmd ("all", class_run, thread_apply_all_command, |
| 697 | _("Apply a command to all threads."), &thread_apply_list); |
| 698 | |
| 699 | if (!xdb_commands) |
| 700 | add_com_alias ("t", "thread", class_run, 1); |
| 701 | } |