| 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 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 "command.h" |
| 34 | #include "gdbcmd.h" |
| 35 | #include "regcache.h" |
| 36 | #include "gdb.h" |
| 37 | #include "gdb_string.h" |
| 38 | |
| 39 | #include <ctype.h> |
| 40 | #include <sys/types.h> |
| 41 | #include <signal.h> |
| 42 | #include "ui-out.h" |
| 43 | |
| 44 | /*#include "lynxos-core.h" */ |
| 45 | |
| 46 | /* Definition of struct thread_info exported to gdbthread.h */ |
| 47 | |
| 48 | /* Prototypes for exported functions. */ |
| 49 | |
| 50 | void _initialize_thread (void); |
| 51 | |
| 52 | /* Prototypes for local functions. */ |
| 53 | |
| 54 | static struct thread_info *thread_list = NULL; |
| 55 | static int highest_thread_num; |
| 56 | |
| 57 | static struct thread_info *find_thread_id (int num); |
| 58 | |
| 59 | static void thread_command (char *tidstr, int from_tty); |
| 60 | static void thread_apply_all_command (char *, int); |
| 61 | static int thread_alive (struct thread_info *); |
| 62 | static void info_threads_command (char *, int); |
| 63 | static void thread_apply_command (char *, int); |
| 64 | static void restore_current_thread (ptid_t); |
| 65 | static void switch_to_thread (ptid_t ptid); |
| 66 | static void prune_threads (void); |
| 67 | |
| 68 | void |
| 69 | delete_step_resume_breakpoint (void *arg) |
| 70 | { |
| 71 | struct breakpoint **breakpointp = (struct breakpoint **) arg; |
| 72 | struct thread_info *tp; |
| 73 | |
| 74 | if (*breakpointp != NULL) |
| 75 | { |
| 76 | delete_breakpoint (*breakpointp); |
| 77 | for (tp = thread_list; tp; tp = tp->next) |
| 78 | if (tp->step_resume_breakpoint == *breakpointp) |
| 79 | tp->step_resume_breakpoint = NULL; |
| 80 | |
| 81 | *breakpointp = NULL; |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | static void |
| 86 | free_thread (struct thread_info *tp) |
| 87 | { |
| 88 | /* NOTE: this will take care of any left-over step_resume breakpoints, |
| 89 | but not any user-specified thread-specific breakpoints. */ |
| 90 | if (tp->step_resume_breakpoint) |
| 91 | delete_breakpoint (tp->step_resume_breakpoint); |
| 92 | |
| 93 | /* FIXME: do I ever need to call the back-end to give it a |
| 94 | chance at this private data before deleting the thread? */ |
| 95 | if (tp->private) |
| 96 | xfree (tp->private); |
| 97 | |
| 98 | xfree (tp); |
| 99 | } |
| 100 | |
| 101 | void |
| 102 | init_thread_list (void) |
| 103 | { |
| 104 | struct thread_info *tp, *tpnext; |
| 105 | |
| 106 | highest_thread_num = 0; |
| 107 | if (!thread_list) |
| 108 | return; |
| 109 | |
| 110 | for (tp = thread_list; tp; tp = tpnext) |
| 111 | { |
| 112 | tpnext = tp->next; |
| 113 | free_thread (tp); |
| 114 | } |
| 115 | |
| 116 | thread_list = NULL; |
| 117 | } |
| 118 | |
| 119 | /* add_thread now returns a pointer to the new thread_info, |
| 120 | so that back_ends can initialize their private data. */ |
| 121 | |
| 122 | struct thread_info * |
| 123 | add_thread (ptid_t ptid) |
| 124 | { |
| 125 | struct thread_info *tp; |
| 126 | |
| 127 | tp = (struct thread_info *) xmalloc (sizeof (*tp)); |
| 128 | memset (tp, 0, sizeof (*tp)); |
| 129 | tp->ptid = ptid; |
| 130 | tp->num = ++highest_thread_num; |
| 131 | tp->next = thread_list; |
| 132 | thread_list = tp; |
| 133 | return tp; |
| 134 | } |
| 135 | |
| 136 | void |
| 137 | delete_thread (ptid_t ptid) |
| 138 | { |
| 139 | struct thread_info *tp, *tpprev; |
| 140 | |
| 141 | tpprev = NULL; |
| 142 | |
| 143 | for (tp = thread_list; tp; tpprev = tp, tp = tp->next) |
| 144 | if (ptid_equal (tp->ptid, ptid)) |
| 145 | break; |
| 146 | |
| 147 | if (!tp) |
| 148 | return; |
| 149 | |
| 150 | if (tpprev) |
| 151 | tpprev->next = tp->next; |
| 152 | else |
| 153 | thread_list = tp->next; |
| 154 | |
| 155 | free_thread (tp); |
| 156 | } |
| 157 | |
| 158 | static struct thread_info * |
| 159 | find_thread_id (int num) |
| 160 | { |
| 161 | struct thread_info *tp; |
| 162 | |
| 163 | for (tp = thread_list; tp; tp = tp->next) |
| 164 | if (tp->num == num) |
| 165 | return tp; |
| 166 | |
| 167 | return NULL; |
| 168 | } |
| 169 | |
| 170 | /* Find a thread_info by matching PTID. */ |
| 171 | struct thread_info * |
| 172 | find_thread_pid (ptid_t ptid) |
| 173 | { |
| 174 | struct thread_info *tp; |
| 175 | |
| 176 | for (tp = thread_list; tp; tp = tp->next) |
| 177 | if (ptid_equal (tp->ptid, ptid)) |
| 178 | return tp; |
| 179 | |
| 180 | return NULL; |
| 181 | } |
| 182 | |
| 183 | /* |
| 184 | * Thread iterator function. |
| 185 | * |
| 186 | * Calls a callback function once for each thread, so long as |
| 187 | * the callback function returns false. If the callback function |
| 188 | * returns true, the iteration will end and the current thread |
| 189 | * will be returned. This can be useful for implementing a |
| 190 | * search for a thread with arbitrary attributes, or for applying |
| 191 | * some operation to every thread. |
| 192 | * |
| 193 | * FIXME: some of the existing functionality, such as |
| 194 | * "Thread apply all", might be rewritten using this functionality. |
| 195 | */ |
| 196 | |
| 197 | struct thread_info * |
| 198 | iterate_over_threads (int (*callback) (struct thread_info *, void *), |
| 199 | void *data) |
| 200 | { |
| 201 | struct thread_info *tp; |
| 202 | |
| 203 | for (tp = thread_list; tp; tp = tp->next) |
| 204 | if ((*callback) (tp, data)) |
| 205 | return tp; |
| 206 | |
| 207 | return NULL; |
| 208 | } |
| 209 | |
| 210 | int |
| 211 | valid_thread_id (int num) |
| 212 | { |
| 213 | struct thread_info *tp; |
| 214 | |
| 215 | for (tp = thread_list; tp; tp = tp->next) |
| 216 | if (tp->num == num) |
| 217 | return 1; |
| 218 | |
| 219 | return 0; |
| 220 | } |
| 221 | |
| 222 | int |
| 223 | pid_to_thread_id (ptid_t ptid) |
| 224 | { |
| 225 | struct thread_info *tp; |
| 226 | |
| 227 | for (tp = thread_list; tp; tp = tp->next) |
| 228 | if (ptid_equal (tp->ptid, ptid)) |
| 229 | return tp->num; |
| 230 | |
| 231 | return 0; |
| 232 | } |
| 233 | |
| 234 | ptid_t |
| 235 | thread_id_to_pid (int num) |
| 236 | { |
| 237 | struct thread_info *thread = find_thread_id (num); |
| 238 | if (thread) |
| 239 | return thread->ptid; |
| 240 | else |
| 241 | return pid_to_ptid (-1); |
| 242 | } |
| 243 | |
| 244 | int |
| 245 | in_thread_list (ptid_t ptid) |
| 246 | { |
| 247 | struct thread_info *tp; |
| 248 | |
| 249 | for (tp = thread_list; tp; tp = tp->next) |
| 250 | if (ptid_equal (tp->ptid, ptid)) |
| 251 | return 1; |
| 252 | |
| 253 | return 0; /* Never heard of 'im */ |
| 254 | } |
| 255 | |
| 256 | /* Print a list of thread ids currently known, and the total number of |
| 257 | threads. To be used from within catch_errors. */ |
| 258 | static int |
| 259 | do_captured_list_thread_ids (struct ui_out *uiout, void *arg) |
| 260 | { |
| 261 | struct thread_info *tp; |
| 262 | int num = 0; |
| 263 | struct cleanup *cleanup_chain; |
| 264 | |
| 265 | prune_threads (); |
| 266 | target_find_new_threads (); |
| 267 | |
| 268 | cleanup_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "thread-ids"); |
| 269 | |
| 270 | for (tp = thread_list; tp; tp = tp->next) |
| 271 | { |
| 272 | num++; |
| 273 | ui_out_field_int (uiout, "thread-id", tp->num); |
| 274 | } |
| 275 | |
| 276 | do_cleanups (cleanup_chain); |
| 277 | ui_out_field_int (uiout, "number-of-threads", num); |
| 278 | return GDB_RC_OK; |
| 279 | } |
| 280 | |
| 281 | /* Official gdblib interface function to get a list of thread ids and |
| 282 | the total number. */ |
| 283 | enum gdb_rc |
| 284 | gdb_list_thread_ids (struct ui_out *uiout) |
| 285 | { |
| 286 | return catch_exceptions (uiout, do_captured_list_thread_ids, NULL, |
| 287 | NULL, RETURN_MASK_ALL); |
| 288 | } |
| 289 | |
| 290 | /* Load infrun state for the thread PID. */ |
| 291 | |
| 292 | void |
| 293 | load_infrun_state (ptid_t ptid, |
| 294 | CORE_ADDR *prev_pc, |
| 295 | int *trap_expected, |
| 296 | struct breakpoint **step_resume_breakpoint, |
| 297 | struct breakpoint **through_sigtramp_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 *stepping_through_sigtramp, |
| 306 | int *current_line, |
| 307 | struct symtab **current_symtab, CORE_ADDR *step_sp) |
| 308 | { |
| 309 | struct thread_info *tp; |
| 310 | |
| 311 | /* If we can't find the thread, then we're debugging a single threaded |
| 312 | process. No need to do anything in that case. */ |
| 313 | tp = find_thread_id (pid_to_thread_id (ptid)); |
| 314 | if (tp == NULL) |
| 315 | return; |
| 316 | |
| 317 | *prev_pc = tp->prev_pc; |
| 318 | *trap_expected = tp->trap_expected; |
| 319 | *step_resume_breakpoint = tp->step_resume_breakpoint; |
| 320 | *through_sigtramp_breakpoint = tp->through_sigtramp_breakpoint; |
| 321 | *step_range_start = tp->step_range_start; |
| 322 | *step_range_end = tp->step_range_end; |
| 323 | *step_frame_id = tp->step_frame_id; |
| 324 | *handling_longjmp = tp->handling_longjmp; |
| 325 | *another_trap = tp->another_trap; |
| 326 | *stepping_through_solib_after_catch = |
| 327 | tp->stepping_through_solib_after_catch; |
| 328 | *stepping_through_solib_catchpoints = |
| 329 | tp->stepping_through_solib_catchpoints; |
| 330 | *stepping_through_sigtramp = tp->stepping_through_sigtramp; |
| 331 | *current_line = tp->current_line; |
| 332 | *current_symtab = tp->current_symtab; |
| 333 | *step_sp = tp->step_sp; |
| 334 | } |
| 335 | |
| 336 | /* Save infrun state for the thread PID. */ |
| 337 | |
| 338 | void |
| 339 | save_infrun_state (ptid_t ptid, |
| 340 | CORE_ADDR prev_pc, |
| 341 | int trap_expected, |
| 342 | struct breakpoint *step_resume_breakpoint, |
| 343 | struct breakpoint *through_sigtramp_breakpoint, |
| 344 | CORE_ADDR step_range_start, |
| 345 | CORE_ADDR step_range_end, |
| 346 | const struct frame_id *step_frame_id, |
| 347 | int handling_longjmp, |
| 348 | int another_trap, |
| 349 | int stepping_through_solib_after_catch, |
| 350 | bpstat stepping_through_solib_catchpoints, |
| 351 | int stepping_through_sigtramp, |
| 352 | int current_line, |
| 353 | struct symtab *current_symtab, CORE_ADDR step_sp) |
| 354 | { |
| 355 | struct thread_info *tp; |
| 356 | |
| 357 | /* If we can't find the thread, then we're debugging a single-threaded |
| 358 | process. Nothing to do in that case. */ |
| 359 | tp = find_thread_id (pid_to_thread_id (ptid)); |
| 360 | if (tp == NULL) |
| 361 | return; |
| 362 | |
| 363 | tp->prev_pc = prev_pc; |
| 364 | tp->trap_expected = trap_expected; |
| 365 | tp->step_resume_breakpoint = step_resume_breakpoint; |
| 366 | tp->through_sigtramp_breakpoint = through_sigtramp_breakpoint; |
| 367 | tp->step_range_start = step_range_start; |
| 368 | tp->step_range_end = step_range_end; |
| 369 | tp->step_frame_id = (*step_frame_id); |
| 370 | tp->handling_longjmp = handling_longjmp; |
| 371 | tp->another_trap = another_trap; |
| 372 | tp->stepping_through_solib_after_catch = stepping_through_solib_after_catch; |
| 373 | tp->stepping_through_solib_catchpoints = stepping_through_solib_catchpoints; |
| 374 | tp->stepping_through_sigtramp = stepping_through_sigtramp; |
| 375 | tp->current_line = current_line; |
| 376 | tp->current_symtab = current_symtab; |
| 377 | tp->step_sp = step_sp; |
| 378 | } |
| 379 | |
| 380 | /* Return true if TP is an active thread. */ |
| 381 | static int |
| 382 | thread_alive (struct thread_info *tp) |
| 383 | { |
| 384 | if (PIDGET (tp->ptid) == -1) |
| 385 | return 0; |
| 386 | if (!target_thread_alive (tp->ptid)) |
| 387 | { |
| 388 | tp->ptid = pid_to_ptid (-1); /* Mark it as dead */ |
| 389 | return 0; |
| 390 | } |
| 391 | return 1; |
| 392 | } |
| 393 | |
| 394 | static void |
| 395 | prune_threads (void) |
| 396 | { |
| 397 | struct thread_info *tp, *next; |
| 398 | |
| 399 | for (tp = thread_list; tp; tp = next) |
| 400 | { |
| 401 | next = tp->next; |
| 402 | if (!thread_alive (tp)) |
| 403 | delete_thread (tp->ptid); |
| 404 | } |
| 405 | } |
| 406 | |
| 407 | /* Print information about currently known threads |
| 408 | |
| 409 | * Note: this has the drawback that it _really_ switches |
| 410 | * threads, which frees the frame cache. A no-side |
| 411 | * effects info-threads command would be nicer. |
| 412 | */ |
| 413 | |
| 414 | static void |
| 415 | info_threads_command (char *arg, int from_tty) |
| 416 | { |
| 417 | struct thread_info *tp; |
| 418 | ptid_t current_ptid; |
| 419 | struct frame_info *cur_frame; |
| 420 | int saved_frame_level = frame_relative_level (get_selected_frame ()); |
| 421 | int counter; |
| 422 | char *extra_info; |
| 423 | |
| 424 | /* Check that there really is a frame. This happens when a simulator |
| 425 | is connected but not loaded or running, for instance. */ |
| 426 | if (legacy_frame_p (current_gdbarch) && saved_frame_level < 0) |
| 427 | error ("No frame."); |
| 428 | |
| 429 | prune_threads (); |
| 430 | target_find_new_threads (); |
| 431 | current_ptid = inferior_ptid; |
| 432 | for (tp = thread_list; tp; tp = tp->next) |
| 433 | { |
| 434 | if (ptid_equal (tp->ptid, current_ptid)) |
| 435 | printf_filtered ("* "); |
| 436 | else |
| 437 | printf_filtered (" "); |
| 438 | |
| 439 | #ifdef HPUXHPPA |
| 440 | printf_filtered ("%d %s", tp->num, target_tid_to_str (tp->ptid)); |
| 441 | #else |
| 442 | printf_filtered ("%d %s", tp->num, target_pid_to_str (tp->ptid)); |
| 443 | #endif |
| 444 | |
| 445 | extra_info = target_extra_thread_info (tp); |
| 446 | if (extra_info) |
| 447 | printf_filtered (" (%s)", extra_info); |
| 448 | puts_filtered (" "); |
| 449 | |
| 450 | switch_to_thread (tp->ptid); |
| 451 | print_stack_frame (get_selected_frame (), -1, 0); |
| 452 | } |
| 453 | |
| 454 | switch_to_thread (current_ptid); |
| 455 | |
| 456 | /* Code below copied from "up_silently_base" in "stack.c". |
| 457 | * It restores the frame set by the user before the "info threads" |
| 458 | * command. We have finished the info-threads display by switching |
| 459 | * back to the current thread. That switch has put us at the top |
| 460 | * of the stack (leaf frame). |
| 461 | */ |
| 462 | counter = saved_frame_level; |
| 463 | cur_frame = find_relative_frame (get_selected_frame (), &counter); |
| 464 | if (counter != 0) |
| 465 | { |
| 466 | /* Ooops, can't restore, tell user where we are. */ |
| 467 | warning ("Couldn't restore frame in current thread, at frame 0"); |
| 468 | print_stack_frame (get_selected_frame (), -1, 0); |
| 469 | } |
| 470 | else |
| 471 | { |
| 472 | select_frame (cur_frame); |
| 473 | } |
| 474 | |
| 475 | /* re-show current frame. */ |
| 476 | show_stack_frame (cur_frame); |
| 477 | } |
| 478 | |
| 479 | /* Switch from one thread to another. */ |
| 480 | |
| 481 | static void |
| 482 | switch_to_thread (ptid_t ptid) |
| 483 | { |
| 484 | if (ptid_equal (ptid, inferior_ptid)) |
| 485 | return; |
| 486 | |
| 487 | inferior_ptid = ptid; |
| 488 | flush_cached_frames (); |
| 489 | registers_changed (); |
| 490 | stop_pc = read_pc (); |
| 491 | select_frame (get_current_frame ()); |
| 492 | } |
| 493 | |
| 494 | static void |
| 495 | restore_current_thread (ptid_t ptid) |
| 496 | { |
| 497 | if (!ptid_equal (ptid, inferior_ptid)) |
| 498 | { |
| 499 | switch_to_thread (ptid); |
| 500 | print_stack_frame (get_current_frame (), 0, -1); |
| 501 | } |
| 502 | } |
| 503 | |
| 504 | struct current_thread_cleanup |
| 505 | { |
| 506 | ptid_t inferior_ptid; |
| 507 | }; |
| 508 | |
| 509 | static void |
| 510 | do_restore_current_thread_cleanup (void *arg) |
| 511 | { |
| 512 | struct current_thread_cleanup *old = arg; |
| 513 | restore_current_thread (old->inferior_ptid); |
| 514 | xfree (old); |
| 515 | } |
| 516 | |
| 517 | static struct cleanup * |
| 518 | make_cleanup_restore_current_thread (ptid_t inferior_ptid) |
| 519 | { |
| 520 | struct current_thread_cleanup *old |
| 521 | = xmalloc (sizeof (struct current_thread_cleanup)); |
| 522 | old->inferior_ptid = inferior_ptid; |
| 523 | return make_cleanup (do_restore_current_thread_cleanup, old); |
| 524 | } |
| 525 | |
| 526 | /* Apply a GDB command to a list of threads. List syntax is a whitespace |
| 527 | seperated list of numbers, or ranges, or the keyword `all'. Ranges consist |
| 528 | of two numbers seperated by a hyphen. Examples: |
| 529 | |
| 530 | thread apply 1 2 7 4 backtrace Apply backtrace cmd to threads 1,2,7,4 |
| 531 | thread apply 2-7 9 p foo(1) Apply p foo(1) cmd to threads 2->7 & 9 |
| 532 | thread apply all p x/i $pc Apply x/i $pc cmd to all threads |
| 533 | */ |
| 534 | |
| 535 | static void |
| 536 | thread_apply_all_command (char *cmd, int from_tty) |
| 537 | { |
| 538 | struct thread_info *tp; |
| 539 | struct cleanup *old_chain; |
| 540 | struct cleanup *saved_cmd_cleanup_chain; |
| 541 | char *saved_cmd; |
| 542 | |
| 543 | if (cmd == NULL || *cmd == '\000') |
| 544 | error ("Please specify a command following the thread ID list"); |
| 545 | |
| 546 | old_chain = make_cleanup_restore_current_thread (inferior_ptid); |
| 547 | |
| 548 | /* It is safe to update the thread list now, before |
| 549 | traversing it for "thread apply all". MVS */ |
| 550 | target_find_new_threads (); |
| 551 | |
| 552 | /* Save a copy of the command in case it is clobbered by |
| 553 | execute_command */ |
| 554 | saved_cmd = xstrdup (cmd); |
| 555 | saved_cmd_cleanup_chain = make_cleanup (xfree, (void *) saved_cmd); |
| 556 | for (tp = thread_list; tp; tp = tp->next) |
| 557 | if (thread_alive (tp)) |
| 558 | { |
| 559 | switch_to_thread (tp->ptid); |
| 560 | #ifdef HPUXHPPA |
| 561 | printf_filtered ("\nThread %d (%s):\n", |
| 562 | tp->num, target_tid_to_str (inferior_ptid)); |
| 563 | #else |
| 564 | printf_filtered ("\nThread %d (%s):\n", tp->num, |
| 565 | target_pid_to_str (inferior_ptid)); |
| 566 | #endif |
| 567 | execute_command (cmd, from_tty); |
| 568 | strcpy (cmd, saved_cmd); /* Restore exact command used previously */ |
| 569 | } |
| 570 | |
| 571 | do_cleanups (saved_cmd_cleanup_chain); |
| 572 | do_cleanups (old_chain); |
| 573 | } |
| 574 | |
| 575 | static void |
| 576 | thread_apply_command (char *tidlist, int from_tty) |
| 577 | { |
| 578 | char *cmd; |
| 579 | char *p; |
| 580 | struct cleanup *old_chain; |
| 581 | struct cleanup *saved_cmd_cleanup_chain; |
| 582 | char *saved_cmd; |
| 583 | |
| 584 | if (tidlist == NULL || *tidlist == '\000') |
| 585 | error ("Please specify a thread ID list"); |
| 586 | |
| 587 | for (cmd = tidlist; *cmd != '\000' && !isalpha (*cmd); cmd++); |
| 588 | |
| 589 | if (*cmd == '\000') |
| 590 | error ("Please specify a command following the thread ID list"); |
| 591 | |
| 592 | old_chain = make_cleanup_restore_current_thread (inferior_ptid); |
| 593 | |
| 594 | /* Save a copy of the command in case it is clobbered by |
| 595 | execute_command */ |
| 596 | saved_cmd = xstrdup (cmd); |
| 597 | saved_cmd_cleanup_chain = make_cleanup (xfree, (void *) saved_cmd); |
| 598 | while (tidlist < cmd) |
| 599 | { |
| 600 | struct thread_info *tp; |
| 601 | int start, end; |
| 602 | |
| 603 | start = strtol (tidlist, &p, 10); |
| 604 | if (p == tidlist) |
| 605 | error ("Error parsing %s", tidlist); |
| 606 | tidlist = p; |
| 607 | |
| 608 | while (*tidlist == ' ' || *tidlist == '\t') |
| 609 | tidlist++; |
| 610 | |
| 611 | if (*tidlist == '-') /* Got a range of IDs? */ |
| 612 | { |
| 613 | tidlist++; /* Skip the - */ |
| 614 | end = strtol (tidlist, &p, 10); |
| 615 | if (p == tidlist) |
| 616 | error ("Error parsing %s", tidlist); |
| 617 | tidlist = p; |
| 618 | |
| 619 | while (*tidlist == ' ' || *tidlist == '\t') |
| 620 | tidlist++; |
| 621 | } |
| 622 | else |
| 623 | end = start; |
| 624 | |
| 625 | for (; start <= end; start++) |
| 626 | { |
| 627 | tp = find_thread_id (start); |
| 628 | |
| 629 | if (!tp) |
| 630 | warning ("Unknown thread %d.", start); |
| 631 | else if (!thread_alive (tp)) |
| 632 | warning ("Thread %d has terminated.", start); |
| 633 | else |
| 634 | { |
| 635 | switch_to_thread (tp->ptid); |
| 636 | #ifdef HPUXHPPA |
| 637 | printf_filtered ("\nThread %d (%s):\n", tp->num, |
| 638 | target_tid_to_str (inferior_ptid)); |
| 639 | #else |
| 640 | printf_filtered ("\nThread %d (%s):\n", tp->num, |
| 641 | target_pid_to_str (inferior_ptid)); |
| 642 | #endif |
| 643 | execute_command (cmd, from_tty); |
| 644 | strcpy (cmd, saved_cmd); /* Restore exact command used previously */ |
| 645 | } |
| 646 | } |
| 647 | } |
| 648 | |
| 649 | do_cleanups (saved_cmd_cleanup_chain); |
| 650 | do_cleanups (old_chain); |
| 651 | } |
| 652 | |
| 653 | /* Switch to the specified thread. Will dispatch off to thread_apply_command |
| 654 | if prefix of arg is `apply'. */ |
| 655 | |
| 656 | static void |
| 657 | thread_command (char *tidstr, int from_tty) |
| 658 | { |
| 659 | if (!tidstr) |
| 660 | { |
| 661 | /* Don't generate an error, just say which thread is current. */ |
| 662 | if (target_has_stack) |
| 663 | printf_filtered ("[Current thread is %d (%s)]\n", |
| 664 | pid_to_thread_id (inferior_ptid), |
| 665 | #if defined(HPUXHPPA) |
| 666 | target_tid_to_str (inferior_ptid) |
| 667 | #else |
| 668 | target_pid_to_str (inferior_ptid) |
| 669 | #endif |
| 670 | ); |
| 671 | else |
| 672 | error ("No stack."); |
| 673 | return; |
| 674 | } |
| 675 | |
| 676 | gdb_thread_select (uiout, tidstr); |
| 677 | } |
| 678 | |
| 679 | static int |
| 680 | do_captured_thread_select (struct ui_out *uiout, void *tidstr) |
| 681 | { |
| 682 | int num; |
| 683 | struct thread_info *tp; |
| 684 | |
| 685 | num = value_as_long (parse_and_eval (tidstr)); |
| 686 | |
| 687 | tp = find_thread_id (num); |
| 688 | |
| 689 | if (!tp) |
| 690 | error ("Thread ID %d not known.", num); |
| 691 | |
| 692 | if (!thread_alive (tp)) |
| 693 | error ("Thread ID %d has terminated.\n", num); |
| 694 | |
| 695 | switch_to_thread (tp->ptid); |
| 696 | |
| 697 | ui_out_text (uiout, "[Switching to thread "); |
| 698 | ui_out_field_int (uiout, "new-thread-id", pid_to_thread_id (inferior_ptid)); |
| 699 | ui_out_text (uiout, " ("); |
| 700 | #if defined(HPUXHPPA) |
| 701 | ui_out_text (uiout, target_tid_to_str (inferior_ptid)); |
| 702 | #else |
| 703 | ui_out_text (uiout, target_pid_to_str (inferior_ptid)); |
| 704 | #endif |
| 705 | ui_out_text (uiout, ")]"); |
| 706 | |
| 707 | print_stack_frame (deprecated_selected_frame, |
| 708 | frame_relative_level (deprecated_selected_frame), 1); |
| 709 | return GDB_RC_OK; |
| 710 | } |
| 711 | |
| 712 | enum gdb_rc |
| 713 | gdb_thread_select (struct ui_out *uiout, char *tidstr) |
| 714 | { |
| 715 | return catch_exceptions (uiout, do_captured_thread_select, tidstr, |
| 716 | NULL, RETURN_MASK_ALL); |
| 717 | } |
| 718 | |
| 719 | /* Commands with a prefix of `thread'. */ |
| 720 | struct cmd_list_element *thread_cmd_list = NULL; |
| 721 | |
| 722 | void |
| 723 | _initialize_thread (void) |
| 724 | { |
| 725 | static struct cmd_list_element *thread_apply_list = NULL; |
| 726 | |
| 727 | add_info ("threads", info_threads_command, |
| 728 | "IDs of currently known threads."); |
| 729 | |
| 730 | add_prefix_cmd ("thread", class_run, thread_command, |
| 731 | "Use this command to switch between threads.\n\ |
| 732 | The new thread ID must be currently known.", &thread_cmd_list, "thread ", 1, &cmdlist); |
| 733 | |
| 734 | add_prefix_cmd ("apply", class_run, thread_apply_command, |
| 735 | "Apply a command to a list of threads.", |
| 736 | &thread_apply_list, "apply ", 1, &thread_cmd_list); |
| 737 | |
| 738 | add_cmd ("all", class_run, thread_apply_all_command, |
| 739 | "Apply a command to all threads.", &thread_apply_list); |
| 740 | |
| 741 | if (!xdb_commands) |
| 742 | add_com_alias ("t", "thread", class_run, 1); |
| 743 | } |