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