1 /* Multi-process/thread control for GDB, the GNU debugger.
2 Copyright 1986, 1987, 1988, 1993, 1998
4 Contributed by Lynx Real-Time Systems, Inc. Los Gatos, CA.
5 Free Software Foundation, Inc.
7 This file is part of GDB.
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.
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.
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
21 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
30 #include "gdbthread.h"
35 #include <sys/types.h>
38 /*#include "lynxos-core.h"*/
42 struct thread_info
*next
;
43 int pid
; /* Actual process id */
44 int num
; /* Convenient handle */
45 CORE_ADDR prev_pc
; /* State from wait_for_inferior */
46 CORE_ADDR prev_func_start
;
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
;
58 static struct thread_info
*thread_list
= NULL
;
59 static int highest_thread_num
;
62 thread_command
PARAMS ((char * tidstr
, int from_tty
));
65 prune_threads
PARAMS ((void));
68 switch_to_thread
PARAMS ((int pid
));
70 static struct thread_info
*
71 find_thread_id
PARAMS ((int num
));
74 info_threads_command
PARAMS ((char *, int));
77 restore_current_thread
PARAMS ((int));
80 thread_apply_all_command
PARAMS ((char *, int));
83 thread_apply_command
PARAMS ((char *, int));
86 thread_alive
PARAMS ((struct thread_info
*));
91 struct thread_info
*tp
, *tpnext
;
96 for (tp
= thread_list
; tp
; tp
= tpnext
)
103 highest_thread_num
= 0;
110 struct thread_info
*tp
;
112 tp
= (struct thread_info
*) xmalloc (sizeof (struct thread_info
));
115 tp
->num
= ++highest_thread_num
;
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;
127 tp
->next
= thread_list
;
135 struct thread_info
*tp
, *tpprev
;
139 for (tp
= thread_list
; tp
; tpprev
= tp
, tp
= tp
->next
)
147 tpprev
->next
= tp
->next
;
149 thread_list
= tp
->next
;
156 static struct thread_info
*
160 struct thread_info
*tp
;
162 for (tp
= thread_list
; tp
; tp
= tp
->next
)
170 valid_thread_id (num
)
173 struct thread_info
*tp
;
175 for (tp
= thread_list
; tp
; tp
= tp
->next
)
183 pid_to_thread_id (pid
)
186 struct thread_info
*tp
;
188 for (tp
= thread_list
; tp
; tp
= tp
->next
)
196 thread_id_to_pid (num
)
199 struct thread_info
*thread
= find_thread_id (num
);
210 struct thread_info
*tp
;
212 for (tp
= thread_list
; tp
; tp
= tp
->next
)
216 return 0; /* Never heard of 'im */
219 /* Load infrun state for the thread PID. */
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
)
228 CORE_ADDR
*prev_func_start
;
229 char **prev_func_name
;
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
;
239 struct thread_info
*tp
;
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
));
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
;
260 /* Save infrun state for the thread PID. */
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
)
269 CORE_ADDR prev_func_start
;
270 char *prev_func_name
;
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
;
280 struct thread_info
*tp
;
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
));
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
;
301 /* Return true if TP is an active thread. */
304 struct thread_info
*tp
;
308 if (! target_thread_alive (tp
->pid
))
310 tp
->pid
= -1; /* Mark it as dead */
319 struct thread_info
*tp
, *tpprev
, *next
;
322 for (tp
= thread_list
; tp
; tp
= next
)
325 if (!thread_alive (tp
))
338 /* Print information about currently known threads */
341 info_threads_command (arg
, from_tty
)
345 struct thread_info
*tp
;
346 int current_pid
= inferior_pid
;
348 /* Avoid coredumps which would happen if we tried to access a NULL
350 if (!target_has_stack
) error ("No stack.");
353 #if defined(FIND_NEW_THREADS)
357 for (tp
= thread_list
; tp
; tp
= tp
->next
)
359 if (tp
->pid
== current_pid
)
360 printf_filtered ("* ");
362 printf_filtered (" ");
364 printf_filtered ("%d %s ", tp
->num
, target_pid_to_str (tp
->pid
));
366 switch_to_thread (tp
->pid
);
368 print_stack_frame (selected_frame
, -1, 0);
370 printf_filtered ("[No stack.]\n");
373 switch_to_thread (current_pid
);
376 /* Switch from one thread to another. */
379 switch_to_thread (pid
)
382 if (pid
== inferior_pid
)
386 flush_cached_frames ();
387 registers_changed ();
389 select_frame (get_current_frame (), 0);
393 restore_current_thread (pid
)
396 if (pid
!= inferior_pid
)
397 switch_to_thread (pid
);
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:
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
410 thread_apply_all_command (cmd
, from_tty
)
414 struct thread_info
*tp
;
415 struct cleanup
*old_chain
;
417 if (cmd
== NULL
|| *cmd
== '\000')
418 error ("Please specify a command following the thread ID list");
420 old_chain
= make_cleanup (restore_current_thread
, inferior_pid
);
422 for (tp
= thread_list
; tp
; tp
= tp
->next
)
423 if (thread_alive (tp
))
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
);
433 thread_apply_command (tidlist
, from_tty
)
439 struct cleanup
*old_chain
;
441 if (tidlist
== NULL
|| *tidlist
== '\000')
442 error ("Please specify a thread ID list");
444 for (cmd
= tidlist
; *cmd
!= '\000' && !isalpha(*cmd
); cmd
++);
447 error ("Please specify a command following the thread ID list");
449 old_chain
= make_cleanup (restore_current_thread
, inferior_pid
);
451 while (tidlist
< cmd
)
453 struct thread_info
*tp
;
456 start
= strtol (tidlist
, &p
, 10);
458 error ("Error parsing %s", tidlist
);
461 while (*tidlist
== ' ' || *tidlist
== '\t')
464 if (*tidlist
== '-') /* Got a range of IDs? */
466 tidlist
++; /* Skip the - */
467 end
= strtol (tidlist
, &p
, 10);
469 error ("Error parsing %s", tidlist
);
472 while (*tidlist
== ' ' || *tidlist
== '\t')
478 for (; start
<= end
; start
++)
480 tp
= find_thread_id (start
);
483 warning ("Unknown thread %d.", start
);
484 else if (!thread_alive (tp
))
485 warning ("Thread %d has terminated.", start
);
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
);
497 /* Switch to the specified thread. Will dispatch off to thread_apply_command
498 if prefix of arg is `apply'. */
501 thread_command (tidstr
, from_tty
)
506 struct thread_info
*tp
;
509 error ("Please specify a thread ID. Use the \"info threads\" command to\n\
510 see the IDs of currently known threads.");
514 tp
= find_thread_id (num
);
517 error ("Thread ID %d not known. Use the \"info threads\" command to\n\
518 see the IDs of currently known threads.", num
);
520 if (!thread_alive (tp
))
521 error ("Thread ID %d has terminated.\n", num
);
523 switch_to_thread (tp
->pid
);
526 printf_filtered ("[Switching to %s]\n", target_pid_to_str (inferior_pid
));
527 print_stack_frame (selected_frame
, selected_frame_level
, 1);
530 /* Commands with a prefix of `thread'. */
531 struct cmd_list_element
*thread_cmd_list
= NULL
;
534 _initialize_thread ()
536 static struct cmd_list_element
*thread_apply_list
= NULL
;
537 extern struct cmd_list_element
*cmdlist
;
539 add_info ("threads", info_threads_command
,
540 "IDs of currently known threads.");
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,
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
);
551 add_cmd ("all", class_run
, thread_apply_all_command
,
552 "Apply a command to all threads.",
555 add_com_alias ("t", "thread", class_run
, 1);