Commit | Line | Data |
---|---|---|
da0baf42 | 1 | /* Multi-process/thread control for GDB, the GNU debugger. |
87feff9d | 2 | Copyright 1986, 1987, 1988, 1993, 1998 |
da0baf42 SG |
3 | |
4 | Contributed by Lynx Real-Time Systems, Inc. Los Gatos, CA. | |
5 | Free Software Foundation, Inc. | |
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 2 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, write to the Free Software | |
6c9638b4 | 21 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
25286543 SG |
22 | |
23 | #include "defs.h" | |
24 | #include "symtab.h" | |
25 | #include "frame.h" | |
26 | #include "inferior.h" | |
27 | #include "environ.h" | |
28 | #include "value.h" | |
29 | #include "target.h" | |
fdfa3315 | 30 | #include "gdbthread.h" |
46c28185 | 31 | #include "command.h" |
89ce0c8f | 32 | #include "gdbcmd.h" |
25286543 | 33 | |
89ce0c8f | 34 | #include <ctype.h> |
25286543 SG |
35 | #include <sys/types.h> |
36 | #include <signal.h> | |
37 | ||
38 | /*#include "lynxos-core.h"*/ | |
39 | ||
40 | struct thread_info | |
41 | { | |
42 | struct thread_info *next; | |
43 | int pid; /* Actual process id */ | |
44 | int num; /* Convenient handle */ | |
88a294b1 JL |
45 | CORE_ADDR prev_pc; /* State from wait_for_inferior */ |
46 | CORE_ADDR prev_func_start; | |
47 | char *prev_func_name; | |
48 | struct breakpoint *step_resume_breakpoint; | |
49 | struct breakpoint *through_sigtramp_breakpoint; | |
50 | CORE_ADDR step_range_start; | |
51 | CORE_ADDR step_range_end; | |
52 | CORE_ADDR step_frame_address; | |
53 | int trap_expected; | |
54 | int handling_longjmp; | |
55 | int another_trap; | |
25286543 SG |
56 | }; |
57 | ||
58 | static struct thread_info *thread_list = NULL; | |
59 | static int highest_thread_num; | |
60 | ||
b607efe7 FF |
61 | static void |
62 | thread_command PARAMS ((char * tidstr, int from_tty)); | |
25286543 | 63 | |
b607efe7 FF |
64 | static void |
65 | prune_threads PARAMS ((void)); | |
25286543 | 66 | |
b607efe7 | 67 | static void |
c889a1eb | 68 | switch_to_thread PARAMS ((int pid)); |
25286543 | 69 | |
b607efe7 FF |
70 | static struct thread_info * |
71 | find_thread_id PARAMS ((int num)); | |
72 | ||
73 | static void | |
74 | info_threads_command PARAMS ((char *, int)); | |
75 | ||
76 | static void | |
77 | restore_current_thread PARAMS ((int)); | |
78 | ||
79 | static void | |
80 | thread_apply_all_command PARAMS ((char *, int)); | |
81 | ||
82 | static void | |
83 | thread_apply_command PARAMS ((char *, int)); | |
de43d7d0 | 84 | |
87feff9d JM |
85 | static int |
86 | thread_alive PARAMS ((struct thread_info *)); | |
87 | ||
25286543 SG |
88 | void |
89 | init_thread_list () | |
90 | { | |
91 | struct thread_info *tp, *tpnext; | |
92 | ||
93 | if (!thread_list) | |
94 | return; | |
95 | ||
96 | for (tp = thread_list; tp; tp = tpnext) | |
97 | { | |
98 | tpnext = tp->next; | |
99 | free (tp); | |
100 | } | |
101 | ||
102 | thread_list = NULL; | |
103 | highest_thread_num = 0; | |
104 | } | |
105 | ||
106 | void | |
107 | add_thread (pid) | |
108 | int pid; | |
109 | { | |
110 | struct thread_info *tp; | |
111 | ||
3082244d | 112 | tp = (struct thread_info *) xmalloc (sizeof (struct thread_info)); |
25286543 SG |
113 | |
114 | tp->pid = pid; | |
115 | tp->num = ++highest_thread_num; | |
88a294b1 JL |
116 | tp->prev_pc = 0; |
117 | tp->prev_func_start = 0; | |
118 | tp->prev_func_name = NULL; | |
119 | tp->step_range_start = 0; | |
120 | tp->step_range_end = 0; | |
121 | tp->step_frame_address =0; | |
122 | tp->step_resume_breakpoint = 0; | |
123 | tp->through_sigtramp_breakpoint = 0; | |
124 | tp->handling_longjmp = 0; | |
125 | tp->trap_expected = 0; | |
126 | tp->another_trap = 0; | |
25286543 SG |
127 | tp->next = thread_list; |
128 | thread_list = tp; | |
129 | } | |
130 | ||
3780c337 MS |
131 | void |
132 | delete_thread (pid) | |
133 | int pid; | |
134 | { | |
135 | struct thread_info *tp, *tpprev; | |
136 | ||
137 | tpprev = NULL; | |
138 | ||
139 | for (tp = thread_list; tp; tpprev = tp, tp = tp->next) | |
140 | if (tp->pid == pid) | |
141 | break; | |
142 | ||
143 | if (!tp) | |
144 | return; | |
145 | ||
146 | if (tpprev) | |
147 | tpprev->next = tp->next; | |
148 | else | |
149 | thread_list = tp->next; | |
150 | ||
151 | free (tp); | |
152 | ||
153 | return; | |
154 | } | |
155 | ||
25286543 SG |
156 | static struct thread_info * |
157 | find_thread_id (num) | |
158 | int num; | |
159 | { | |
160 | struct thread_info *tp; | |
161 | ||
162 | for (tp = thread_list; tp; tp = tp->next) | |
163 | if (tp->num == num) | |
164 | return tp; | |
165 | ||
166 | return NULL; | |
167 | } | |
168 | ||
de43d7d0 SG |
169 | int |
170 | valid_thread_id (num) | |
171 | int num; | |
172 | { | |
173 | struct thread_info *tp; | |
174 | ||
175 | for (tp = thread_list; tp; tp = tp->next) | |
176 | if (tp->num == num) | |
177 | return 1; | |
178 | ||
179 | return 0; | |
180 | } | |
181 | ||
182 | int | |
183 | pid_to_thread_id (pid) | |
184 | int pid; | |
185 | { | |
186 | struct thread_info *tp; | |
187 | ||
188 | for (tp = thread_list; tp; tp = tp->next) | |
189 | if (tp->pid == pid) | |
190 | return tp->num; | |
191 | ||
192 | return 0; | |
193 | } | |
194 | ||
c889a1eb MS |
195 | int |
196 | thread_id_to_pid (num) | |
197 | int num; | |
198 | { | |
199 | struct thread_info *thread = find_thread_id (num); | |
200 | if (thread) | |
201 | return thread->pid; | |
202 | else | |
203 | return -1; | |
204 | } | |
205 | ||
25286543 SG |
206 | int |
207 | in_thread_list (pid) | |
208 | int pid; | |
209 | { | |
210 | struct thread_info *tp; | |
211 | ||
212 | for (tp = thread_list; tp; tp = tp->next) | |
213 | if (tp->pid == pid) | |
214 | return 1; | |
215 | ||
216 | return 0; /* Never heard of 'im */ | |
217 | } | |
218 | ||
88a294b1 JL |
219 | /* Load infrun state for the thread PID. */ |
220 | ||
221 | void load_infrun_state (pid, prev_pc, prev_func_start, prev_func_name, | |
222 | trap_expected, step_resume_breakpoint, | |
223 | through_sigtramp_breakpoint, step_range_start, | |
224 | step_range_end, step_frame_address, | |
225 | handling_longjmp, another_trap) | |
226 | int pid; | |
227 | CORE_ADDR *prev_pc; | |
228 | CORE_ADDR *prev_func_start; | |
229 | char **prev_func_name; | |
230 | int *trap_expected; | |
231 | struct breakpoint **step_resume_breakpoint; | |
232 | struct breakpoint **through_sigtramp_breakpoint; | |
233 | CORE_ADDR *step_range_start; | |
234 | CORE_ADDR *step_range_end; | |
235 | CORE_ADDR *step_frame_address; | |
236 | int *handling_longjmp; | |
237 | int *another_trap; | |
238 | { | |
239 | struct thread_info *tp; | |
240 | ||
241 | /* If we can't find the thread, then we're debugging a single threaded | |
242 | process. No need to do anything in that case. */ | |
243 | tp = find_thread_id (pid_to_thread_id (pid)); | |
244 | if (tp == NULL) | |
245 | return; | |
246 | ||
247 | *prev_pc = tp->prev_pc; | |
248 | *prev_func_start = tp->prev_func_start; | |
249 | *prev_func_name = tp->prev_func_name; | |
250 | *step_resume_breakpoint = tp->step_resume_breakpoint; | |
251 | *step_range_start = tp->step_range_start; | |
252 | *step_range_end = tp->step_range_end; | |
253 | *step_frame_address = tp->step_frame_address; | |
254 | *through_sigtramp_breakpoint = tp->through_sigtramp_breakpoint; | |
255 | *handling_longjmp = tp->handling_longjmp; | |
256 | *trap_expected = tp->trap_expected; | |
257 | *another_trap = tp->another_trap; | |
258 | } | |
259 | ||
260 | /* Save infrun state for the thread PID. */ | |
261 | ||
262 | void save_infrun_state (pid, prev_pc, prev_func_start, prev_func_name, | |
263 | trap_expected, step_resume_breakpoint, | |
264 | through_sigtramp_breakpoint, step_range_start, | |
265 | step_range_end, step_frame_address, | |
266 | handling_longjmp, another_trap) | |
267 | int pid; | |
268 | CORE_ADDR prev_pc; | |
269 | CORE_ADDR prev_func_start; | |
270 | char *prev_func_name; | |
271 | int trap_expected; | |
272 | struct breakpoint *step_resume_breakpoint; | |
273 | struct breakpoint *through_sigtramp_breakpoint; | |
274 | CORE_ADDR step_range_start; | |
275 | CORE_ADDR step_range_end; | |
276 | CORE_ADDR step_frame_address; | |
277 | int handling_longjmp; | |
278 | int another_trap; | |
279 | { | |
280 | struct thread_info *tp; | |
281 | ||
282 | /* If we can't find the thread, then we're debugging a single-threaded | |
283 | process. Nothing to do in that case. */ | |
284 | tp = find_thread_id (pid_to_thread_id (pid)); | |
285 | if (tp == NULL) | |
286 | return; | |
287 | ||
288 | tp->prev_pc = prev_pc; | |
289 | tp->prev_func_start = prev_func_start; | |
290 | tp->prev_func_name = prev_func_name; | |
291 | tp->step_resume_breakpoint = step_resume_breakpoint; | |
292 | tp->step_range_start = step_range_start; | |
293 | tp->step_range_end = step_range_end; | |
294 | tp->step_frame_address = step_frame_address; | |
295 | tp->through_sigtramp_breakpoint = through_sigtramp_breakpoint; | |
296 | tp->handling_longjmp = handling_longjmp; | |
297 | tp->trap_expected = trap_expected; | |
298 | tp->another_trap = another_trap; | |
299 | } | |
300 | ||
2847920a MS |
301 | /* Return true if TP is an active thread. */ |
302 | static int | |
303 | thread_alive (tp) | |
304 | struct thread_info *tp; | |
305 | { | |
306 | if (tp->pid == -1) | |
307 | return 0; | |
308 | if (! target_thread_alive (tp->pid)) | |
309 | { | |
310 | tp->pid = -1; /* Mark it as dead */ | |
311 | return 0; | |
312 | } | |
313 | return 1; | |
314 | } | |
315 | ||
25286543 SG |
316 | static void |
317 | prune_threads () | |
318 | { | |
2847920a | 319 | struct thread_info *tp, *tpprev, *next; |
25286543 SG |
320 | |
321 | tpprev = 0; | |
2847920a MS |
322 | for (tp = thread_list; tp; tp = next) |
323 | { | |
324 | next = tp->next; | |
325 | if (!thread_alive (tp)) | |
326 | { | |
327 | if (tpprev) | |
328 | tpprev->next = next; | |
329 | else | |
330 | thread_list = next; | |
331 | free (tp); | |
332 | } | |
333 | else | |
334 | tpprev = tp; | |
335 | } | |
25286543 SG |
336 | } |
337 | ||
338 | /* Print information about currently known threads */ | |
339 | ||
340 | static void | |
341 | info_threads_command (arg, from_tty) | |
342 | char *arg; | |
343 | int from_tty; | |
344 | { | |
345 | struct thread_info *tp; | |
346 | int current_pid = inferior_pid; | |
347 | ||
4cc1b3f7 JK |
348 | /* Avoid coredumps which would happen if we tried to access a NULL |
349 | selected_frame. */ | |
350 | if (!target_has_stack) error ("No stack."); | |
351 | ||
2847920a | 352 | prune_threads (); |
02227894 DT |
353 | #if defined(FIND_NEW_THREADS) |
354 | FIND_NEW_THREADS (); | |
355 | #endif | |
356 | ||
25286543 SG |
357 | for (tp = thread_list; tp; tp = tp->next) |
358 | { | |
25286543 SG |
359 | if (tp->pid == current_pid) |
360 | printf_filtered ("* "); | |
361 | else | |
362 | printf_filtered (" "); | |
363 | ||
364 | printf_filtered ("%d %s ", tp->num, target_pid_to_str (tp->pid)); | |
365 | ||
c889a1eb | 366 | switch_to_thread (tp->pid); |
3780c337 MS |
367 | if (selected_frame) |
368 | print_stack_frame (selected_frame, -1, 0); | |
369 | else | |
370 | printf_filtered ("[No stack.]\n"); | |
25286543 SG |
371 | } |
372 | ||
c889a1eb | 373 | switch_to_thread (current_pid); |
25286543 SG |
374 | } |
375 | ||
376 | /* Switch from one thread to another. */ | |
377 | ||
3082244d | 378 | static void |
c889a1eb | 379 | switch_to_thread (pid) |
25286543 SG |
380 | int pid; |
381 | { | |
382 | if (pid == inferior_pid) | |
383 | return; | |
384 | ||
385 | inferior_pid = pid; | |
25286543 SG |
386 | flush_cached_frames (); |
387 | registers_changed (); | |
388 | stop_pc = read_pc(); | |
25286543 SG |
389 | select_frame (get_current_frame (), 0); |
390 | } | |
391 | ||
5090e82c SG |
392 | static void |
393 | restore_current_thread (pid) | |
394 | int pid; | |
395 | { | |
396 | if (pid != inferior_pid) | |
c889a1eb | 397 | switch_to_thread (pid); |
5090e82c SG |
398 | } |
399 | ||
400 | /* Apply a GDB command to a list of threads. List syntax is a whitespace | |
401 | seperated list of numbers, or ranges, or the keyword `all'. Ranges consist | |
402 | of two numbers seperated by a hyphen. Examples: | |
403 | ||
404 | thread apply 1 2 7 4 backtrace Apply backtrace cmd to threads 1,2,7,4 | |
405 | thread apply 2-7 9 p foo(1) Apply p foo(1) cmd to threads 2->7 & 9 | |
406 | thread apply all p x/i $pc Apply x/i $pc cmd to all threads | |
407 | */ | |
408 | ||
409 | static void | |
410 | thread_apply_all_command (cmd, from_tty) | |
411 | char *cmd; | |
412 | int from_tty; | |
413 | { | |
414 | struct thread_info *tp; | |
415 | struct cleanup *old_chain; | |
416 | ||
417 | if (cmd == NULL || *cmd == '\000') | |
418 | error ("Please specify a command following the thread ID list"); | |
419 | ||
420 | old_chain = make_cleanup (restore_current_thread, inferior_pid); | |
421 | ||
422 | for (tp = thread_list; tp; tp = tp->next) | |
2847920a MS |
423 | if (thread_alive (tp)) |
424 | { | |
425 | switch_to_thread (tp->pid); | |
426 | printf_filtered ("\nThread %d (%s):\n", tp->num, | |
427 | target_pid_to_str (inferior_pid)); | |
428 | execute_command (cmd, from_tty); | |
429 | } | |
5090e82c SG |
430 | } |
431 | ||
432 | static void | |
433 | thread_apply_command (tidlist, from_tty) | |
434 | char *tidlist; | |
435 | int from_tty; | |
436 | { | |
437 | char *cmd; | |
438 | char *p; | |
439 | struct cleanup *old_chain; | |
440 | ||
441 | if (tidlist == NULL || *tidlist == '\000') | |
442 | error ("Please specify a thread ID list"); | |
443 | ||
444 | for (cmd = tidlist; *cmd != '\000' && !isalpha(*cmd); cmd++); | |
445 | ||
446 | if (*cmd == '\000') | |
447 | error ("Please specify a command following the thread ID list"); | |
448 | ||
449 | old_chain = make_cleanup (restore_current_thread, inferior_pid); | |
450 | ||
451 | while (tidlist < cmd) | |
452 | { | |
453 | struct thread_info *tp; | |
454 | int start, end; | |
455 | ||
456 | start = strtol (tidlist, &p, 10); | |
457 | if (p == tidlist) | |
458 | error ("Error parsing %s", tidlist); | |
459 | tidlist = p; | |
460 | ||
461 | while (*tidlist == ' ' || *tidlist == '\t') | |
462 | tidlist++; | |
463 | ||
464 | if (*tidlist == '-') /* Got a range of IDs? */ | |
465 | { | |
466 | tidlist++; /* Skip the - */ | |
467 | end = strtol (tidlist, &p, 10); | |
468 | if (p == tidlist) | |
469 | error ("Error parsing %s", tidlist); | |
470 | tidlist = p; | |
471 | ||
472 | while (*tidlist == ' ' || *tidlist == '\t') | |
473 | tidlist++; | |
474 | } | |
475 | else | |
476 | end = start; | |
477 | ||
478 | for (; start <= end; start++) | |
479 | { | |
480 | tp = find_thread_id (start); | |
481 | ||
482 | if (!tp) | |
2847920a MS |
483 | warning ("Unknown thread %d.", start); |
484 | else if (!thread_alive (tp)) | |
485 | warning ("Thread %d has terminated.", start); | |
486 | else | |
5090e82c | 487 | { |
2847920a MS |
488 | switch_to_thread (tp->pid); |
489 | printf_filtered ("\nThread %d (%s):\n", tp->num, | |
490 | target_pid_to_str (inferior_pid)); | |
491 | execute_command (cmd, from_tty); | |
5090e82c | 492 | } |
5090e82c SG |
493 | } |
494 | } | |
495 | } | |
496 | ||
497 | /* Switch to the specified thread. Will dispatch off to thread_apply_command | |
498 | if prefix of arg is `apply'. */ | |
499 | ||
25286543 SG |
500 | static void |
501 | thread_command (tidstr, from_tty) | |
502 | char *tidstr; | |
503 | int from_tty; | |
504 | { | |
505 | int num; | |
506 | struct thread_info *tp; | |
507 | ||
508 | if (!tidstr) | |
509 | error ("Please specify a thread ID. Use the \"info threads\" command to\n\ | |
510 | see the IDs of currently known threads."); | |
511 | ||
25286543 SG |
512 | num = atoi (tidstr); |
513 | ||
514 | tp = find_thread_id (num); | |
515 | ||
516 | if (!tp) | |
517 | error ("Thread ID %d not known. Use the \"info threads\" command to\n\ | |
518 | see the IDs of currently known threads.", num); | |
2847920a MS |
519 | |
520 | if (!thread_alive (tp)) | |
521 | error ("Thread ID %d has terminated.\n", num); | |
25286543 | 522 | |
c889a1eb | 523 | switch_to_thread (tp->pid); |
4ff5d55a MH |
524 | if (context_hook) |
525 | context_hook (num); | |
25286543 SG |
526 | printf_filtered ("[Switching to %s]\n", target_pid_to_str (inferior_pid)); |
527 | print_stack_frame (selected_frame, selected_frame_level, 1); | |
528 | } | |
529 | ||
c889a1eb MS |
530 | /* Commands with a prefix of `thread'. */ |
531 | struct cmd_list_element *thread_cmd_list = NULL; | |
532 | ||
25286543 SG |
533 | void |
534 | _initialize_thread () | |
535 | { | |
5090e82c SG |
536 | static struct cmd_list_element *thread_apply_list = NULL; |
537 | extern struct cmd_list_element *cmdlist; | |
538 | ||
25286543 SG |
539 | add_info ("threads", info_threads_command, |
540 | "IDs of currently known threads."); | |
5090e82c SG |
541 | |
542 | add_prefix_cmd ("thread", class_run, thread_command, | |
543 | "Use this command to switch between threads.\n\ | |
544 | The new thread ID must be currently known.", &thread_cmd_list, "thread ", 1, | |
545 | &cmdlist); | |
546 | ||
547 | add_prefix_cmd ("apply", class_run, thread_apply_command, | |
548 | "Apply a command to a list of threads.", | |
549 | &thread_apply_list, "apply ", 1, &thread_cmd_list); | |
550 | ||
551 | add_cmd ("all", class_run, thread_apply_all_command, | |
552 | "Apply a command to all threads.", | |
553 | &thread_apply_list); | |
554 | ||
555 | add_com_alias ("t", "thread", class_run, 1); | |
25286543 | 556 | } |