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c906108c | 1 | /* Multi-process/thread control defs for GDB, the GNU debugger. |
618f726f | 2 | Copyright (C) 1987-2016 Free Software Foundation, Inc. |
b6ba6518 KB |
3 | Contributed by Lynx Real-Time Systems, Inc. Los Gatos, CA. |
4 | ||
c906108c | 5 | |
c5aa993b | 6 | This file is part of GDB. |
c906108c | 7 | |
c5aa993b JM |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 11 | (at your option) any later version. |
c906108c | 12 | |
c5aa993b JM |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
c906108c | 17 | |
c5aa993b | 18 | You should have received a copy of the GNU General Public License |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
20 | |
21 | #ifndef GDBTHREAD_H | |
22 | #define GDBTHREAD_H | |
23 | ||
da3331ec AC |
24 | struct symtab; |
25 | ||
c906108c | 26 | #include "breakpoint.h" |
aa0cd9c1 | 27 | #include "frame.h" |
8e8901c5 | 28 | #include "ui-out.h" |
a474d7c2 | 29 | #include "inferior.h" |
02d27625 | 30 | #include "btrace.h" |
6c659fc2 | 31 | #include "common/vec.h" |
372316f1 | 32 | #include "target/waitstatus.h" |
5d5658a1 | 33 | #include "cli/cli-utils.h" |
8e8901c5 | 34 | |
30596231 PA |
35 | /* Frontend view of the thread state. Possible extensions: stepping, |
36 | finishing, until(ling),... */ | |
37 | enum thread_state | |
38 | { | |
39 | THREAD_STOPPED, | |
40 | THREAD_RUNNING, | |
41 | THREAD_EXITED, | |
42 | }; | |
43 | ||
16c381f0 | 44 | /* Inferior thread specific part of `struct infcall_control_state'. |
8ea051c5 | 45 | |
16c381f0 | 46 | Inferior process counterpart is `struct inferior_control_state'. */ |
8ea051c5 | 47 | |
16c381f0 JK |
48 | struct thread_control_state |
49 | { | |
4e1c45ea PA |
50 | /* User/external stepping state. */ |
51 | ||
8358c15c JK |
52 | /* Step-resume or longjmp-resume breakpoint. */ |
53 | struct breakpoint *step_resume_breakpoint; | |
54 | ||
186c406b TT |
55 | /* Exception-resume breakpoint. */ |
56 | struct breakpoint *exception_resume_breakpoint; | |
57 | ||
34b7e8a6 PA |
58 | /* Breakpoints used for software single stepping. Plural, because |
59 | it may have multiple locations. E.g., if stepping over a | |
60 | conditional branch instruction we can't decode the condition for, | |
61 | we'll need to put a breakpoint at the branch destination, and | |
62 | another at the instruction after the branch. */ | |
63 | struct breakpoint *single_step_breakpoints; | |
64 | ||
4e1c45ea PA |
65 | /* Range to single step within. |
66 | ||
67 | If this is nonzero, respond to a single-step signal by continuing | |
68 | to step if the pc is in this range. | |
69 | ||
70 | If step_range_start and step_range_end are both 1, it means to | |
71 | step for a single instruction (FIXME: it might clean up | |
72 | wait_for_inferior in a minor way if this were changed to the | |
73 | address of the instruction and that address plus one. But maybe | |
0963b4bd | 74 | not). */ |
4e1c45ea PA |
75 | CORE_ADDR step_range_start; /* Inclusive */ |
76 | CORE_ADDR step_range_end; /* Exclusive */ | |
77 | ||
885eeb5b PA |
78 | /* Function the thread was in as of last it started stepping. */ |
79 | struct symbol *step_start_function; | |
80 | ||
c1e36e3e PA |
81 | /* If GDB issues a target step request, and this is nonzero, the |
82 | target should single-step this thread once, and then continue | |
83 | single-stepping it without GDB core involvement as long as the | |
84 | thread stops in the step range above. If this is zero, the | |
85 | target should ignore the step range, and only issue one single | |
86 | step. */ | |
87 | int may_range_step; | |
88 | ||
4e1c45ea PA |
89 | /* Stack frame address as of when stepping command was issued. |
90 | This is how we know when we step into a subroutine call, and how | |
91 | to set the frame for the breakpoint used to step out. */ | |
aa0cd9c1 | 92 | struct frame_id step_frame_id; |
edb3359d DJ |
93 | |
94 | /* Similarly, the frame ID of the underlying stack frame (skipping | |
95 | any inlined frames). */ | |
96 | struct frame_id step_stack_frame_id; | |
97 | ||
4e1c45ea PA |
98 | /* Nonzero if we are presently stepping over a breakpoint. |
99 | ||
100 | If we hit a breakpoint or watchpoint, and then continue, we need | |
101 | to single step the current thread with breakpoints disabled, to | |
102 | avoid hitting the same breakpoint or watchpoint again. And we | |
103 | should step just a single thread and keep other threads stopped, | |
104 | so that other threads don't miss breakpoints while they are | |
105 | removed. | |
106 | ||
107 | So, this variable simultaneously means that we need to single | |
108 | step the current thread, keep other threads stopped, and that | |
109 | breakpoints should be removed while we step. | |
110 | ||
111 | This variable is set either: | |
112 | - in proceed, when we resume inferior on user's explicit request | |
113 | - in keep_going, if handle_inferior_event decides we need to | |
114 | step over breakpoint. | |
115 | ||
116 | The variable is cleared in normal_stop. The proceed calls | |
117 | wait_for_inferior, which calls handle_inferior_event in a loop, | |
118 | and until wait_for_inferior exits, this variable is changed only | |
119 | by keep_going. */ | |
0d06e24b | 120 | int trap_expected; |
4e1c45ea | 121 | |
16c381f0 | 122 | /* Nonzero if the thread is being proceeded for a "finish" command |
46c03469 | 123 | or a similar situation when return value should be printed. */ |
16c381f0 JK |
124 | int proceed_to_finish; |
125 | ||
126 | /* Nonzero if the thread is being proceeded for an inferior function | |
127 | call. */ | |
128 | int in_infcall; | |
129 | ||
130 | enum step_over_calls_kind step_over_calls; | |
131 | ||
132 | /* Nonzero if stopped due to a step command. */ | |
133 | int stop_step; | |
134 | ||
135 | /* Chain containing status of breakpoint(s) the thread stopped | |
136 | at. */ | |
137 | bpstat stop_bpstat; | |
17b2616c | 138 | |
856e7dd6 PA |
139 | /* Whether the command that started the thread was a stepping |
140 | command. This is used to decide whether "set scheduler-locking | |
141 | step" behaves like "on" or "off". */ | |
142 | int stepping_command; | |
16c381f0 JK |
143 | }; |
144 | ||
a38fe4fe | 145 | /* Inferior thread specific part of `struct infcall_suspend_state'. */ |
16c381f0 JK |
146 | |
147 | struct thread_suspend_state | |
148 | { | |
70509625 PA |
149 | /* Last signal that the inferior received (why it stopped). When |
150 | the thread is resumed, this signal is delivered. Note: the | |
151 | target should not check whether the signal is in pass state, | |
152 | because the signal may have been explicitly passed with the | |
153 | "signal" command, which overrides "handle nopass". If the signal | |
154 | should be suppressed, the core will take care of clearing this | |
155 | before the target is resumed. */ | |
2ea28649 | 156 | enum gdb_signal stop_signal; |
372316f1 PA |
157 | |
158 | /* The reason the thread last stopped, if we need to track it | |
159 | (breakpoint, watchpoint, etc.) */ | |
160 | enum target_stop_reason stop_reason; | |
161 | ||
162 | /* The waitstatus for this thread's last event. */ | |
163 | struct target_waitstatus waitstatus; | |
164 | /* If true WAITSTATUS hasn't been handled yet. */ | |
165 | int waitstatus_pending_p; | |
166 | ||
167 | /* Record the pc of the thread the last time it stopped. (This is | |
168 | not the current thread's PC as that may have changed since the | |
169 | last stop, e.g., "return" command, or "p $pc = 0xf000"). This is | |
170 | used in coordination with stop_reason and waitstatus_pending_p: | |
171 | if the thread's PC is changed since it last stopped, a pending | |
172 | breakpoint waitstatus is discarded. */ | |
173 | CORE_ADDR stop_pc; | |
16c381f0 JK |
174 | }; |
175 | ||
6c659fc2 SC |
176 | typedef struct value *value_ptr; |
177 | DEF_VEC_P (value_ptr); | |
178 | typedef VEC (value_ptr) value_vec; | |
179 | ||
16c381f0 JK |
180 | struct thread_info |
181 | { | |
182 | struct thread_info *next; | |
183 | ptid_t ptid; /* "Actual process id"; | |
184 | In fact, this may be overloaded with | |
185 | kernel thread id, etc. */ | |
5d5658a1 PA |
186 | |
187 | /* Each thread has two GDB IDs. | |
188 | ||
189 | a) The thread ID (Id). This consists of the pair of: | |
190 | ||
191 | - the number of the thread's inferior and, | |
192 | ||
193 | - the thread's thread number in its inferior, aka, the | |
194 | per-inferior thread number. This number is unique in the | |
195 | inferior but not unique between inferiors. | |
196 | ||
197 | b) The global ID (GId). This is a a single integer unique | |
198 | between all inferiors. | |
199 | ||
200 | E.g.: | |
201 | ||
202 | (gdb) info threads -gid | |
203 | Id GId Target Id Frame | |
204 | * 1.1 1 Thread A 0x16a09237 in foo () at foo.c:10 | |
205 | 1.2 3 Thread B 0x15ebc6ed in bar () at foo.c:20 | |
206 | 1.3 5 Thread C 0x15ebc6ed in bar () at foo.c:20 | |
207 | 2.1 2 Thread A 0x16a09237 in foo () at foo.c:10 | |
208 | 2.2 4 Thread B 0x15ebc6ed in bar () at foo.c:20 | |
209 | 2.3 6 Thread C 0x15ebc6ed in bar () at foo.c:20 | |
210 | ||
211 | Above, both inferiors 1 and 2 have threads numbered 1-3, but each | |
212 | thread has its own unique global ID. */ | |
213 | ||
c84f6bbf | 214 | /* The thread's global GDB thread number. This is exposed to MI, |
663f6d42 PA |
215 | Python/Scheme, visible with "info threads -gid", and is also what |
216 | the $_gthread convenience variable is bound to. */ | |
5d5658a1 PA |
217 | int global_num; |
218 | ||
219 | /* The per-inferior thread number. This is unique in the inferior | |
220 | the thread belongs to, but not unique between inferiors. This is | |
221 | what the $_thread convenience variable is bound to. */ | |
222 | int per_inf_num; | |
223 | ||
224 | /* The inferior this thread belongs to. */ | |
225 | struct inferior *inf; | |
16c381f0 | 226 | |
4694da01 TT |
227 | /* The name of the thread, as specified by the user. This is NULL |
228 | if the thread does not have a user-given name. */ | |
229 | char *name; | |
230 | ||
16c381f0 JK |
231 | /* Non-zero means the thread is executing. Note: this is different |
232 | from saying that there is an active target and we are stopped at | |
233 | a breakpoint, for instance. This is a real indicator whether the | |
234 | thread is off and running. */ | |
30596231 | 235 | int executing; |
16c381f0 | 236 | |
372316f1 PA |
237 | /* Non-zero if this thread is resumed from infrun's perspective. |
238 | Note that a thread can be marked both as not-executing and | |
239 | resumed at the same time. This happens if we try to resume a | |
240 | thread that has a wait status pending. We shouldn't let the | |
241 | thread really run until that wait status has been processed, but | |
242 | we should not process that wait status if we didn't try to let | |
243 | the thread run. */ | |
244 | int resumed; | |
245 | ||
f6e29b6e YQ |
246 | /* Frontend view of the thread state. Note that the THREAD_RUNNING/ |
247 | THREAD_STOPPED states are different from EXECUTING. When the | |
248 | thread is stopped internally while handling an internal event, | |
249 | like a software single-step breakpoint, EXECUTING will be false, | |
250 | but STATE will still be THREAD_RUNNING. */ | |
251 | enum thread_state state; | |
16c381f0 JK |
252 | |
253 | /* If this is > 0, then it means there's code out there that relies | |
254 | on this thread being listed. Don't delete it from the lists even | |
255 | if we detect it exiting. */ | |
256 | int refcount; | |
257 | ||
258 | /* State of GDB control of inferior thread execution. | |
259 | See `struct thread_control_state'. */ | |
260 | struct thread_control_state control; | |
261 | ||
262 | /* State of inferior thread to restore after GDB is done with an inferior | |
263 | call. See `struct thread_suspend_state'. */ | |
264 | struct thread_suspend_state suspend; | |
265 | ||
16c381f0 JK |
266 | int current_line; |
267 | struct symtab *current_symtab; | |
268 | ||
269 | /* Internal stepping state. */ | |
270 | ||
4d9d9d04 PA |
271 | /* Record the pc of the thread the last time it was resumed. (It |
272 | can't be done on stop as the PC may change since the last stop, | |
273 | e.g., "return" command, or "p $pc = 0xf000"). This is maintained | |
274 | by proceed and keep_going, and among other things, it's used in | |
16c381f0 JK |
275 | adjust_pc_after_break to distinguish a hardware single-step |
276 | SIGTRAP from a breakpoint SIGTRAP. */ | |
277 | CORE_ADDR prev_pc; | |
278 | ||
7f5ef605 PA |
279 | /* Did we set the thread stepping a breakpoint instruction? This is |
280 | used in conjunction with PREV_PC to decide whether to adjust the | |
281 | PC. */ | |
282 | int stepped_breakpoint; | |
283 | ||
4e1c45ea | 284 | /* Should we step over breakpoint next time keep_going is called? */ |
ca67fcb8 | 285 | int stepping_over_breakpoint; |
0d06e24b | 286 | |
963f9c80 PA |
287 | /* Should we step over a watchpoint next time keep_going is called? |
288 | This is needed on targets with non-continuable, non-steppable | |
289 | watchpoints. */ | |
290 | int stepping_over_watchpoint; | |
291 | ||
4e1c45ea | 292 | /* Set to TRUE if we should finish single-stepping over a breakpoint |
6aa27652 YQ |
293 | after hitting the current step-resume breakpoint. The context here |
294 | is that GDB is to do `next' or `step' while signal arrives. | |
295 | When stepping over a breakpoint and signal arrives, GDB will attempt | |
296 | to skip signal handler, so it inserts a step_resume_breakpoint at the | |
297 | signal return address, and resume inferior. | |
298 | step_after_step_resume_breakpoint is set to TRUE at this moment in | |
299 | order to keep GDB in mind that there is still a breakpoint to step over | |
300 | when GDB gets back SIGTRAP from step_resume_breakpoint. */ | |
4e1c45ea PA |
301 | int step_after_step_resume_breakpoint; |
302 | ||
243a9253 PA |
303 | /* Pointer to the state machine manager object that handles what is |
304 | left to do for the thread's execution command after the target | |
305 | stops. Several execution commands use it. */ | |
306 | struct thread_fsm *thread_fsm; | |
a474d7c2 | 307 | |
e58b0e63 PA |
308 | /* This is used to remember when a fork or vfork event was caught by |
309 | a catchpoint, and thus the event is to be followed at the next | |
310 | resume of the thread, and not immediately. */ | |
311 | struct target_waitstatus pending_follow; | |
312 | ||
252fbfc8 PA |
313 | /* True if this thread has been explicitly requested to stop. */ |
314 | int stop_requested; | |
315 | ||
186c406b | 316 | /* The initiating frame of a nexting operation, used for deciding |
e2e4d78b JK |
317 | which exceptions to intercept. If it is null_frame_id no |
318 | bp_longjmp or bp_exception but longjmp has been caught just for | |
319 | bp_longjmp_call_dummy. */ | |
186c406b TT |
320 | struct frame_id initiating_frame; |
321 | ||
0d06e24b | 322 | /* Private data used by the target vector implementation. */ |
fe978cb0 | 323 | struct private_thread_info *priv; |
dc146f7c VP |
324 | |
325 | /* Function that is called to free PRIVATE. If this is NULL, then | |
326 | xfree will be called on PRIVATE. */ | |
327 | void (*private_dtor) (struct private_thread_info *); | |
02d27625 MM |
328 | |
329 | /* Branch trace information for this thread. */ | |
330 | struct btrace_thread_info btrace; | |
6c659fc2 SC |
331 | |
332 | /* Flag which indicates that the stack temporaries should be stored while | |
333 | evaluating expressions. */ | |
334 | int stack_temporaries_enabled; | |
335 | ||
336 | /* Values that are stored as temporaries on stack while evaluating | |
337 | expressions. */ | |
338 | value_vec *stack_temporaries; | |
c2829269 PA |
339 | |
340 | /* Step-over chain. A thread is in the step-over queue if these are | |
341 | non-NULL. If only a single thread is in the chain, then these | |
342 | fields point to self. */ | |
343 | struct thread_info *step_over_prev; | |
344 | struct thread_info *step_over_next; | |
0d06e24b JM |
345 | }; |
346 | ||
347 | /* Create an empty thread list, or empty the existing one. */ | |
348 | extern void init_thread_list (void); | |
349 | ||
93815fbf VP |
350 | /* Add a thread to the thread list, print a message |
351 | that a new thread is found, and return the pointer to | |
352 | the new thread. Caller my use this pointer to | |
353 | initialize the private thread data. */ | |
39f77062 | 354 | extern struct thread_info *add_thread (ptid_t ptid); |
0d06e24b | 355 | |
93815fbf VP |
356 | /* Same as add_thread, but does not print a message |
357 | about new thread. */ | |
358 | extern struct thread_info *add_thread_silent (ptid_t ptid); | |
359 | ||
17faa917 DJ |
360 | /* Same as add_thread, and sets the private info. */ |
361 | extern struct thread_info *add_thread_with_info (ptid_t ptid, | |
362 | struct private_thread_info *); | |
363 | ||
0d06e24b | 364 | /* Delete an existing thread list entry. */ |
39f77062 | 365 | extern void delete_thread (ptid_t); |
0d06e24b | 366 | |
5e0b29c1 PA |
367 | /* Delete an existing thread list entry, and be quiet about it. Used |
368 | after the process this thread having belonged to having already | |
369 | exited, for example. */ | |
370 | extern void delete_thread_silent (ptid_t); | |
371 | ||
0963b4bd | 372 | /* Delete a step_resume_breakpoint from the thread database. */ |
4e1c45ea | 373 | extern void delete_step_resume_breakpoint (struct thread_info *); |
8601f500 | 374 | |
0963b4bd | 375 | /* Delete an exception_resume_breakpoint from the thread database. */ |
186c406b TT |
376 | extern void delete_exception_resume_breakpoint (struct thread_info *); |
377 | ||
34b7e8a6 PA |
378 | /* Delete the single-step breakpoints of thread TP, if any. */ |
379 | extern void delete_single_step_breakpoints (struct thread_info *tp); | |
380 | ||
381 | /* Check if the thread has software single stepping breakpoints | |
382 | set. */ | |
383 | extern int thread_has_single_step_breakpoints_set (struct thread_info *tp); | |
384 | ||
385 | /* Check whether the thread has software single stepping breakpoints | |
386 | set at PC. */ | |
387 | extern int thread_has_single_step_breakpoint_here (struct thread_info *tp, | |
388 | struct address_space *aspace, | |
389 | CORE_ADDR addr); | |
390 | ||
5d5658a1 PA |
391 | /* Translate the global integer thread id (GDB's homegrown id, not the |
392 | system's) into a "pid" (which may be overloaded with extra thread | |
393 | information). */ | |
394 | extern ptid_t global_thread_id_to_ptid (int num); | |
395 | ||
396 | /* Translate a 'pid' (which may be overloaded with extra thread | |
397 | information) into the global integer thread id (GDB's homegrown id, | |
398 | not the system's). */ | |
399 | extern int ptid_to_global_thread_id (ptid_t ptid); | |
0d06e24b | 400 | |
5d5658a1 PA |
401 | /* Returns whether to show inferior-qualified thread IDs, or plain |
402 | thread numbers. Inferior-qualified IDs are shown whenever we have | |
403 | multiple inferiors, or the only inferior left has number > 1. */ | |
404 | extern int show_inferior_qualified_tids (void); | |
0d06e24b | 405 | |
5d5658a1 PA |
406 | /* Return a string version of THR's thread ID. If there are multiple |
407 | inferiors, then this prints the inferior-qualifier form, otherwise | |
408 | it only prints the thread number. The result is stored in a | |
409 | circular static buffer, NUMCELLS deep. */ | |
43792cf0 PA |
410 | const char *print_thread_id (struct thread_info *thr); |
411 | ||
0d06e24b JM |
412 | /* Boolean test for an already-known pid (which may be overloaded with |
413 | extra thread information). */ | |
39f77062 | 414 | extern int in_thread_list (ptid_t ptid); |
0d06e24b | 415 | |
5d5658a1 PA |
416 | /* Boolean test for an already-known global thread id (GDB's homegrown |
417 | global id, not the system's). */ | |
418 | extern int valid_global_thread_id (int global_id); | |
0d06e24b JM |
419 | |
420 | /* Search function to lookup a thread by 'pid'. */ | |
e09875d4 | 421 | extern struct thread_info *find_thread_ptid (ptid_t ptid); |
0d06e24b | 422 | |
5d5658a1 PA |
423 | /* Find thread by GDB global thread ID. */ |
424 | struct thread_info *find_thread_global_id (int global_id); | |
1e92afda | 425 | |
bad34192 PA |
426 | /* Finds the first thread of the inferior given by PID. If PID is -1, |
427 | returns the first thread in the list. */ | |
428 | struct thread_info *first_thread_of_process (int pid); | |
429 | ||
32990ada PA |
430 | /* Returns any thread of process PID, giving preference to the current |
431 | thread. */ | |
2277426b PA |
432 | extern struct thread_info *any_thread_of_process (int pid); |
433 | ||
32990ada PA |
434 | /* Returns any non-exited thread of process PID, giving preference to |
435 | the current thread, and to not executing threads. */ | |
6c95b8df PA |
436 | extern struct thread_info *any_live_thread_of_process (int pid); |
437 | ||
5231c1fd PA |
438 | /* Change the ptid of thread OLD_PTID to NEW_PTID. */ |
439 | void thread_change_ptid (ptid_t old_ptid, ptid_t new_ptid); | |
440 | ||
0d06e24b JM |
441 | /* Iterator function to call a user-provided callback function |
442 | once for each known thread. */ | |
443 | typedef int (*thread_callback_func) (struct thread_info *, void *); | |
444 | extern struct thread_info *iterate_over_threads (thread_callback_func, void *); | |
445 | ||
5d5658a1 PA |
446 | /* Traverse all threads. */ |
447 | #define ALL_THREADS(T) \ | |
448 | for (T = thread_list; T; T = T->next) \ | |
449 | ||
450 | /* Traverse over all threads, sorted by inferior. */ | |
451 | #define ALL_THREADS_BY_INFERIOR(inf, tp) \ | |
452 | ALL_INFERIORS (inf) \ | |
453 | ALL_THREADS (tp) \ | |
454 | if (inf == tp->inf) | |
455 | ||
034f788c PA |
456 | /* Traverse all threads, except those that have THREAD_EXITED |
457 | state. */ | |
e5ef252a | 458 | |
034f788c PA |
459 | #define ALL_NON_EXITED_THREADS(T) \ |
460 | for (T = thread_list; T; T = T->next) \ | |
461 | if ((T)->state != THREAD_EXITED) | |
e5ef252a | 462 | |
8a06aea7 PA |
463 | /* Traverse all threads, including those that have THREAD_EXITED |
464 | state. Allows deleting the currently iterated thread. */ | |
465 | #define ALL_THREADS_SAFE(T, TMP) \ | |
ab970af1 PA |
466 | for ((T) = thread_list; \ |
467 | (T) != NULL ? ((TMP) = (T)->next, 1): 0; \ | |
8a06aea7 | 468 | (T) = (TMP)) |
ab970af1 | 469 | |
20874c92 VP |
470 | extern int thread_count (void); |
471 | ||
6efcd9a8 PA |
472 | /* Switch from one thread to another. Also sets the STOP_PC |
473 | global. */ | |
6a6b96b9 UW |
474 | extern void switch_to_thread (ptid_t ptid); |
475 | ||
6efcd9a8 PA |
476 | /* Switch from one thread to another. Does not read registers and |
477 | sets STOP_PC to -1. */ | |
478 | extern void switch_to_thread_no_regs (struct thread_info *thread); | |
479 | ||
372316f1 PA |
480 | /* Marks or clears thread(s) PTID as resumed. If PTID is |
481 | MINUS_ONE_PTID, applies to all threads. If ptid_is_pid(PTID) is | |
482 | true, applies to all threads of the process pointed at by PTID. */ | |
483 | extern void set_resumed (ptid_t ptid, int resumed); | |
484 | ||
e1ac3328 | 485 | /* Marks thread PTID is running, or stopped. |
28153fd3 | 486 | If PTID is minus_one_ptid, marks all threads. */ |
e1ac3328 VP |
487 | extern void set_running (ptid_t ptid, int running); |
488 | ||
252fbfc8 PA |
489 | /* Marks or clears thread(s) PTID as having been requested to stop. |
490 | If PTID is MINUS_ONE_PTID, applies to all threads. If | |
491 | ptid_is_pid(PTID) is true, applies to all threads of the process | |
492 | pointed at by PTID. If STOP, then the THREAD_STOP_REQUESTED | |
493 | observer is called with PTID as argument. */ | |
494 | extern void set_stop_requested (ptid_t ptid, int stop); | |
495 | ||
0d6431e2 PA |
496 | /* NOTE: Since the thread state is not a boolean, most times, you do |
497 | not want to check it with negation. If you really want to check if | |
498 | the thread is stopped, | |
e1ac3328 | 499 | |
0d6431e2 PA |
500 | use (good): |
501 | ||
502 | if (is_stopped (ptid)) | |
503 | ||
504 | instead of (bad): | |
505 | ||
506 | if (!is_running (ptid)) | |
507 | ||
508 | The latter also returns true on exited threads, most likelly not | |
509 | what you want. */ | |
510 | ||
511 | /* Reports if in the frontend's perpective, thread PTID is running. */ | |
512 | extern int is_running (ptid_t ptid); | |
8ea051c5 | 513 | |
4f8d22e3 PA |
514 | /* Is this thread listed, but known to have exited? We keep it listed |
515 | (but not visible) until it's safe to delete. */ | |
516 | extern int is_exited (ptid_t ptid); | |
517 | ||
0d6431e2 | 518 | /* In the frontend's perpective, is this thread stopped? */ |
4f8d22e3 PA |
519 | extern int is_stopped (ptid_t ptid); |
520 | ||
28153fd3 | 521 | /* Marks thread PTID as executing, or not. If PTID is minus_one_ptid, |
0d6431e2 PA |
522 | marks all threads. |
523 | ||
524 | Note that this is different from the running state. See the | |
30596231 | 525 | description of state and executing fields of struct |
0d6431e2 | 526 | thread_info. */ |
8ea051c5 PA |
527 | extern void set_executing (ptid_t ptid, int executing); |
528 | ||
529 | /* Reports if thread PTID is executing. */ | |
530 | extern int is_executing (ptid_t ptid); | |
531 | ||
b57bacec PA |
532 | /* True if any (known or unknown) thread is or may be executing. */ |
533 | extern int threads_are_executing (void); | |
534 | ||
29f49a6a PA |
535 | /* Merge the executing property of thread PTID over to its thread |
536 | state property (frontend running/stopped view). | |
537 | ||
538 | "not executing" -> "stopped" | |
539 | "executing" -> "running" | |
540 | "exited" -> "exited" | |
541 | ||
28153fd3 | 542 | If PTID is minus_one_ptid, go over all threads. |
29f49a6a PA |
543 | |
544 | Notifications are only emitted if the thread state did change. */ | |
545 | extern void finish_thread_state (ptid_t ptid); | |
546 | ||
547 | /* Same as FINISH_THREAD_STATE, but with an interface suitable to be | |
548 | registered as a cleanup. PTID_P points to the ptid_t that is | |
549 | passed to FINISH_THREAD_STATE. */ | |
550 | extern void finish_thread_state_cleanup (void *ptid_p); | |
551 | ||
c906108c SS |
552 | /* Commands with a prefix of `thread'. */ |
553 | extern struct cmd_list_element *thread_cmd_list; | |
554 | ||
f0e8c4c5 JK |
555 | extern void thread_command (char *tidstr, int from_tty); |
556 | ||
93815fbf VP |
557 | /* Print notices on thread events (attach, detach, etc.), set with |
558 | `set print thread-events'. */ | |
559 | extern int print_thread_events; | |
560 | ||
5d5658a1 PA |
561 | /* Prints the list of threads and their details on UIOUT. If |
562 | REQUESTED_THREADS, a list of GDB ids/ranges, is not NULL, only | |
563 | print threads whose ID is included in the list. If PID is not -1, | |
564 | only print threads from the process PID. Otherwise, threads from | |
565 | all attached PIDs are printed. If both REQUESTED_THREADS is not | |
566 | NULL and PID is not -1, then the thread is printed if it belongs to | |
567 | the specified process. Otherwise, an error is raised. */ | |
568 | extern void print_thread_info (struct ui_out *uiout, char *requested_threads, | |
3ee1c036 | 569 | int pid); |
8e8901c5 | 570 | |
4f8d22e3 | 571 | extern struct cleanup *make_cleanup_restore_current_thread (void); |
6208b47d | 572 | |
4e1c45ea PA |
573 | /* Returns a pointer into the thread_info corresponding to |
574 | INFERIOR_PTID. INFERIOR_PTID *must* be in the thread list. */ | |
575 | extern struct thread_info* inferior_thread (void); | |
6208b47d | 576 | |
dc146f7c VP |
577 | extern void update_thread_list (void); |
578 | ||
e8032dde PA |
579 | /* Delete any thread the target says is no longer alive. */ |
580 | ||
581 | extern void prune_threads (void); | |
582 | ||
8a06aea7 PA |
583 | /* Delete threads marked THREAD_EXITED. Unlike prune_threads, this |
584 | does not consult the target about whether the thread is alive right | |
585 | now. */ | |
586 | extern void delete_exited_threads (void); | |
587 | ||
ce4c476a PA |
588 | /* Return true if PC is in the stepping range of THREAD. */ |
589 | ||
590 | int pc_in_thread_step_range (CORE_ADDR pc, struct thread_info *thread); | |
591 | ||
6c659fc2 SC |
592 | extern struct cleanup *enable_thread_stack_temporaries (ptid_t ptid); |
593 | ||
594 | extern int thread_stack_temporaries_enabled_p (ptid_t ptid); | |
595 | ||
596 | extern void push_thread_stack_temporary (ptid_t ptid, struct value *v); | |
597 | ||
598 | extern struct value *get_last_thread_stack_temporary (ptid_t); | |
599 | ||
600 | extern int value_in_thread_stack_temporaries (struct value *, ptid_t); | |
601 | ||
c2829269 PA |
602 | /* Add TP to the end of its inferior's pending step-over chain. */ |
603 | ||
604 | extern void thread_step_over_chain_enqueue (struct thread_info *tp); | |
605 | ||
606 | /* Remove TP from its inferior's pending step-over chain. */ | |
607 | ||
608 | extern void thread_step_over_chain_remove (struct thread_info *tp); | |
609 | ||
610 | /* Return the next thread in the step-over chain starting at TP. NULL | |
611 | if TP is the last entry in the chain. */ | |
612 | ||
613 | extern struct thread_info *thread_step_over_chain_next (struct thread_info *tp); | |
614 | ||
615 | /* Return true if TP is in the step-over chain. */ | |
616 | ||
617 | extern int thread_is_in_step_over_chain (struct thread_info *tp); | |
618 | ||
243a9253 PA |
619 | /* Cancel any ongoing execution command. */ |
620 | ||
621 | extern void thread_cancel_execution_command (struct thread_info *thr); | |
622 | ||
a911d87a PA |
623 | /* Check whether it makes sense to access a register of the current |
624 | thread at this point. If not, throw an error (e.g., the thread is | |
625 | executing). */ | |
626 | extern void validate_registers_access (void); | |
627 | ||
f303dbd6 PA |
628 | /* Returns whether to show which thread hit the breakpoint, received a |
629 | signal, etc. and ended up causing a user-visible stop. This is | |
630 | true iff we ever detected multiple threads. */ | |
631 | extern int show_thread_that_caused_stop (void); | |
632 | ||
e5ef252a PA |
633 | extern struct thread_info *thread_list; |
634 | ||
c5aa993b | 635 | #endif /* GDBTHREAD_H */ |