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da59e081 | 1 | /* Interface GDB to the GNU Hurd. |
9b254dd1 DJ |
2 | Copyright (C) 1992, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2006, 2007, |
3 | 2008 Free Software Foundation, Inc. | |
c906108c SS |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | Written by Miles Bader <miles@gnu.ai.mit.edu> | |
8 | ||
9 | Some code and ideas from m3-nat.c by Jukka Virtanen <jtv@hut.fi> | |
10 | ||
11 | This program is free software; you can redistribute it and/or modify | |
12 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 13 | the Free Software Foundation; either version 3 of the License, or |
c906108c SS |
14 | (at your option) any later version. |
15 | ||
16 | This program is distributed in the hope that it will be useful, | |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
20 | ||
21 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 22 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
c5aa993b | 23 | */ |
c906108c | 24 | |
2747183e | 25 | #include <ctype.h> |
942fd805 | 26 | #include <errno.h> |
c906108c | 27 | #include <limits.h> |
942fd805 MK |
28 | #include <setjmp.h> |
29 | #include <signal.h> | |
30 | #include <stdio.h> | |
aef21287 | 31 | #include "gdb_string.h" |
c906108c SS |
32 | #include <sys/ptrace.h> |
33 | ||
c906108c | 34 | #include <mach.h> |
c906108c SS |
35 | #include <mach_error.h> |
36 | #include <mach/exception.h> | |
942fd805 MK |
37 | #include <mach/message.h> |
38 | #include <mach/notify.h> | |
c906108c SS |
39 | #include <mach/vm_attributes.h> |
40 | ||
942fd805 MK |
41 | #include <hurd.h> |
42 | #include <hurd/interrupt.h> | |
c906108c SS |
43 | #include <hurd/msg.h> |
44 | #include <hurd/msg_request.h> | |
942fd805 | 45 | #include <hurd/process.h> |
96ffcb62 AS |
46 | /* Defined in <hurd/process.h>, but we need forward declarations from |
47 | <hurd/process_request.h> as well. */ | |
48 | #undef _process_user_ | |
942fd805 | 49 | #include <hurd/process_request.h> |
c906108c | 50 | #include <hurd/signal.h> |
c906108c SS |
51 | #include <hurd/sigpreempt.h> |
52 | ||
53 | #include <portinfo.h> | |
54 | ||
55 | #include "defs.h" | |
56 | #include "inferior.h" | |
57 | #include "symtab.h" | |
58 | #include "value.h" | |
59 | #include "language.h" | |
60 | #include "target.h" | |
03f2053f | 61 | #include "gdb_wait.h" |
c906108c SS |
62 | #include "gdbcmd.h" |
63 | #include "gdbcore.h" | |
942fd805 | 64 | #include "gdbthread.h" |
bf62e5b4 | 65 | #include "gdb_assert.h" |
3b3e6bee | 66 | #include "gdb_obstack.h" |
c906108c SS |
67 | |
68 | #include "gnu-nat.h" | |
69 | ||
70 | #include "exc_request_S.h" | |
71 | #include "notify_S.h" | |
72 | #include "process_reply_S.h" | |
73 | #include "msg_reply_S.h" | |
74 | #include "exc_request_U.h" | |
75 | #include "msg_U.h" | |
76 | ||
77 | static process_t proc_server = MACH_PORT_NULL; | |
78 | ||
79 | /* If we've sent a proc_wait_request to the proc server, the pid of the | |
80 | process we asked about. We can only ever have one outstanding. */ | |
81 | int proc_wait_pid = 0; | |
82 | ||
83 | /* The number of wait requests we've sent, and expect replies from. */ | |
84 | int proc_waits_pending = 0; | |
85 | ||
86 | int gnu_debug_flag = 0; | |
87 | ||
88 | /* Forward decls */ | |
89 | ||
90 | extern struct target_ops gnu_ops; | |
c906108c | 91 | |
c906108c SS |
92 | struct inf *make_inf (); |
93 | void inf_clear_wait (struct inf *inf); | |
94 | void inf_cleanup (struct inf *inf); | |
95 | void inf_startup (struct inf *inf, int pid); | |
96 | int inf_update_suspends (struct inf *inf); | |
97 | void inf_set_pid (struct inf *inf, pid_t pid); | |
98 | void inf_validate_procs (struct inf *inf); | |
99 | void inf_steal_exc_ports (struct inf *inf); | |
100 | void inf_restore_exc_ports (struct inf *inf); | |
101 | struct proc *inf_tid_to_proc (struct inf *inf, int tid); | |
39efb398 AC |
102 | void inf_set_threads_resume_sc (struct inf *inf, |
103 | struct proc *run_thread, | |
104 | int run_others); | |
105 | int inf_set_threads_resume_sc_for_signal_thread (struct inf *inf); | |
106 | void inf_suspend (struct inf *inf); | |
107 | void inf_resume (struct inf *inf); | |
c906108c SS |
108 | void inf_set_step_thread (struct inf *inf, struct proc *proc); |
109 | void inf_detach (struct inf *inf); | |
110 | void inf_attach (struct inf *inf, int pid); | |
111 | void inf_signal (struct inf *inf, enum target_signal sig); | |
cce74817 | 112 | void inf_continue (struct inf *inf); |
c906108c SS |
113 | |
114 | #define inf_debug(_inf, msg, args...) \ | |
115 | do { struct inf *__inf = (_inf); \ | |
116 | debug ("{inf %d %p}: " msg, __inf->pid, __inf , ##args); } while (0) | |
117 | ||
118 | void proc_abort (struct proc *proc, int force); | |
c906108c SS |
119 | struct proc *make_proc (struct inf *inf, mach_port_t port, int tid); |
120 | struct proc *_proc_free (struct proc *proc); | |
121 | int proc_update_sc (struct proc *proc); | |
c5aa993b | 122 | error_t proc_get_exception_port (struct proc *proc, mach_port_t * port); |
c906108c SS |
123 | error_t proc_set_exception_port (struct proc *proc, mach_port_t port); |
124 | static mach_port_t _proc_get_exc_port (struct proc *proc); | |
125 | void proc_steal_exc_port (struct proc *proc, mach_port_t exc_port); | |
126 | void proc_restore_exc_port (struct proc *proc); | |
127 | int proc_trace (struct proc *proc, int set); | |
c906108c SS |
128 | |
129 | /* Evaluate RPC_EXPR in a scope with the variables MSGPORT and REFPORT bound | |
130 | to INF's msg port and task port respectively. If it has no msg port, | |
131 | EIEIO is returned. INF must refer to a running process! */ | |
132 | #define INF_MSGPORT_RPC(inf, rpc_expr) \ | |
133 | HURD_MSGPORT_RPC (proc_getmsgport (proc_server, inf->pid, &msgport), \ | |
134 | (refport = inf->task->port, 0), 0, \ | |
135 | msgport ? (rpc_expr) : EIEIO) | |
136 | ||
137 | /* Like INF_MSGPORT_RPC, but will also resume the signal thread to ensure | |
138 | there's someone around to deal with the RPC (and resuspend things | |
139 | afterwards). This effects INF's threads' resume_sc count. */ | |
140 | #define INF_RESUME_MSGPORT_RPC(inf, rpc_expr) \ | |
141 | (inf_set_threads_resume_sc_for_signal_thread (inf) \ | |
142 | ? ({ error_t __e; \ | |
143 | inf_resume (inf); \ | |
144 | __e = INF_MSGPORT_RPC (inf, rpc_expr); \ | |
145 | inf_suspend (inf); \ | |
146 | __e; }) \ | |
147 | : EIEIO) | |
148 | ||
c906108c SS |
149 | \f |
150 | /* The state passed by an exception message. */ | |
151 | struct exc_state | |
c5aa993b JM |
152 | { |
153 | int exception; /* The exception code */ | |
154 | int code, subcode; | |
155 | mach_port_t handler; /* The real exception port to handle this. */ | |
156 | mach_port_t reply; /* The reply port from the exception call. */ | |
157 | }; | |
c906108c SS |
158 | |
159 | /* The results of the last wait an inf did. */ | |
160 | struct inf_wait | |
c5aa993b JM |
161 | { |
162 | struct target_waitstatus status; /* The status returned to gdb. */ | |
163 | struct exc_state exc; /* The exception that caused us to return. */ | |
164 | struct proc *thread; /* The thread in question. */ | |
165 | int suppress; /* Something trivial happened. */ | |
166 | }; | |
c906108c SS |
167 | |
168 | /* The state of an inferior. */ | |
169 | struct inf | |
c5aa993b JM |
170 | { |
171 | /* Fields describing the current inferior. */ | |
c906108c | 172 | |
c5aa993b JM |
173 | struct proc *task; /* The mach task. */ |
174 | struct proc *threads; /* A linked list of all threads in TASK. */ | |
c906108c | 175 | |
c5aa993b JM |
176 | /* True if THREADS needn't be validated by querying the task. We assume that |
177 | we and the task in question are the only ones frobbing the thread list, | |
178 | so as long as we don't let any code run, we don't have to worry about | |
179 | THREADS changing. */ | |
180 | int threads_up_to_date; | |
c906108c | 181 | |
c5aa993b | 182 | pid_t pid; /* The real system PID. */ |
c906108c | 183 | |
c5aa993b | 184 | struct inf_wait wait; /* What to return from target_wait. */ |
c906108c | 185 | |
c5aa993b JM |
186 | /* One thread proc in INF may be in `single-stepping mode'. This is it. */ |
187 | struct proc *step_thread; | |
c906108c | 188 | |
c5aa993b JM |
189 | /* The thread we think is the signal thread. */ |
190 | struct proc *signal_thread; | |
c906108c | 191 | |
c5aa993b | 192 | mach_port_t event_port; /* Where we receive various msgs. */ |
c906108c | 193 | |
c5aa993b JM |
194 | /* True if we think at least one thread in the inferior could currently be |
195 | running. */ | |
196 | unsigned int running:1; | |
c906108c | 197 | |
c5aa993b JM |
198 | /* True if the process has stopped (in the proc server sense). Note that |
199 | since a proc server `stop' leaves the signal thread running, the inf can | |
200 | be RUNNING && STOPPED... */ | |
201 | unsigned int stopped:1; | |
cce74817 | 202 | |
c5aa993b JM |
203 | /* True if the inferior has no message port. */ |
204 | unsigned int nomsg:1; | |
c906108c | 205 | |
c5aa993b JM |
206 | /* True if the inferior is traced. */ |
207 | unsigned int traced:1; | |
c906108c | 208 | |
c5aa993b JM |
209 | /* True if we shouldn't try waiting for the inferior, usually because we |
210 | can't for some reason. */ | |
211 | unsigned int no_wait:1; | |
c906108c | 212 | |
c5aa993b JM |
213 | /* When starting a new inferior, we don't try to validate threads until all |
214 | the proper execs have been done. This is a count of how many execs we | |
215 | expect to happen. */ | |
216 | unsigned pending_execs; | |
c906108c | 217 | |
c5aa993b | 218 | /* Fields describing global state */ |
c906108c | 219 | |
c5aa993b JM |
220 | /* The task suspend count used when gdb has control. This is normally 1 to |
221 | make things easier for us, but sometimes (like when attaching to vital | |
222 | system servers) it may be desirable to let the task continue to run | |
223 | (pausing individual threads as necessary). */ | |
224 | int pause_sc; | |
c906108c | 225 | |
c5aa993b JM |
226 | /* The task suspend count left when detaching from a task. */ |
227 | int detach_sc; | |
c906108c | 228 | |
c5aa993b JM |
229 | /* The initial values used for the run_sc and pause_sc of newly discovered |
230 | threads -- see the definition of those fields in struct proc. */ | |
231 | int default_thread_run_sc; | |
232 | int default_thread_pause_sc; | |
233 | int default_thread_detach_sc; | |
c906108c | 234 | |
c5aa993b JM |
235 | /* True if the process should be traced when started/attached. Newly |
236 | started processes *must* be traced at first to exec them properly, but | |
237 | if this is false, tracing is turned off as soon it has done so. */ | |
238 | int want_signals; | |
c906108c | 239 | |
c5aa993b JM |
240 | /* True if exceptions from the inferior process should be trapped. This |
241 | must be on to use breakpoints. */ | |
242 | int want_exceptions; | |
243 | }; | |
c906108c SS |
244 | |
245 | ||
c5aa993b JM |
246 | int |
247 | __proc_pid (struct proc *proc) | |
c906108c SS |
248 | { |
249 | return proc->inf->pid; | |
250 | } | |
942fd805 | 251 | |
c906108c SS |
252 | \f |
253 | /* Update PROC's real suspend count to match it's desired one. Returns true | |
254 | if we think PROC is now in a runnable state. */ | |
255 | int | |
256 | proc_update_sc (struct proc *proc) | |
257 | { | |
258 | int running; | |
c5aa993b | 259 | int err = 0; |
c906108c SS |
260 | int delta = proc->sc - proc->cur_sc; |
261 | ||
262 | if (delta) | |
263 | proc_debug (proc, "sc: %d --> %d", proc->cur_sc, proc->sc); | |
264 | ||
265 | if (proc->sc == 0 && proc->state_changed) | |
266 | /* Since PROC may start running, we must write back any state changes. */ | |
267 | { | |
bf62e5b4 | 268 | gdb_assert (proc_is_thread (proc)); |
c906108c SS |
269 | proc_debug (proc, "storing back changed thread state"); |
270 | err = thread_set_state (proc->port, THREAD_STATE_FLAVOR, | |
f75c77fc | 271 | (thread_state_t) &proc->state, THREAD_STATE_SIZE); |
c5aa993b | 272 | if (!err) |
c906108c SS |
273 | proc->state_changed = 0; |
274 | } | |
275 | ||
276 | if (delta > 0) | |
942fd805 MK |
277 | { |
278 | while (delta-- > 0 && !err) | |
279 | { | |
280 | if (proc_is_task (proc)) | |
281 | err = task_suspend (proc->port); | |
282 | else | |
283 | err = thread_suspend (proc->port); | |
284 | } | |
285 | } | |
c906108c | 286 | else |
942fd805 MK |
287 | { |
288 | while (delta++ < 0 && !err) | |
289 | { | |
290 | if (proc_is_task (proc)) | |
291 | err = task_resume (proc->port); | |
292 | else | |
293 | err = thread_resume (proc->port); | |
294 | } | |
295 | } | |
c5aa993b | 296 | if (!err) |
c906108c SS |
297 | proc->cur_sc = proc->sc; |
298 | ||
299 | /* If we got an error, then the task/thread has disappeared. */ | |
300 | running = !err && proc->sc == 0; | |
301 | ||
302 | proc_debug (proc, "is %s", err ? "dead" : running ? "running" : "suspended"); | |
303 | if (err) | |
dc672865 | 304 | proc_debug (proc, "err = %s", safe_strerror (err)); |
c906108c SS |
305 | |
306 | if (running) | |
307 | { | |
308 | proc->aborted = 0; | |
309 | proc->state_valid = proc->state_changed = 0; | |
310 | proc->fetched_regs = 0; | |
311 | } | |
312 | ||
313 | return running; | |
314 | } | |
942fd805 | 315 | |
c906108c SS |
316 | \f |
317 | /* Thread_abort is called on PROC if needed. PROC must be a thread proc. | |
318 | If PROC is deemed `precious', then nothing is done unless FORCE is true. | |
319 | In particular, a thread is precious if it's running (in which case forcing | |
320 | it includes suspending it first), or if it has an exception pending. */ | |
321 | void | |
322 | proc_abort (struct proc *proc, int force) | |
323 | { | |
bf62e5b4 | 324 | gdb_assert (proc_is_thread (proc)); |
c906108c | 325 | |
c5aa993b | 326 | if (!proc->aborted) |
c906108c SS |
327 | { |
328 | struct inf *inf = proc->inf; | |
329 | int running = (proc->cur_sc == 0 && inf->task->cur_sc == 0); | |
330 | ||
331 | if (running && force) | |
332 | { | |
333 | proc->sc = 1; | |
334 | inf_update_suspends (proc->inf); | |
335 | running = 0; | |
8a3fe4f8 | 336 | warning (_("Stopped %s."), proc_string (proc)); |
c906108c SS |
337 | } |
338 | else if (proc == inf->wait.thread && inf->wait.exc.reply && !force) | |
339 | /* An exception is pending on PROC, which don't mess with. */ | |
340 | running = 1; | |
341 | ||
c5aa993b | 342 | if (!running) |
c906108c SS |
343 | /* We only abort the thread if it's not actually running. */ |
344 | { | |
345 | thread_abort (proc->port); | |
346 | proc_debug (proc, "aborted"); | |
347 | proc->aborted = 1; | |
348 | } | |
349 | else | |
350 | proc_debug (proc, "not aborting"); | |
351 | } | |
352 | } | |
353 | ||
354 | /* Make sure that the state field in PROC is up to date, and return a pointer | |
355 | to it, or 0 if something is wrong. If WILL_MODIFY is true, makes sure | |
356 | that the thread is stopped and aborted first, and sets the state_changed | |
357 | field in PROC to true. */ | |
358 | thread_state_t | |
359 | proc_get_state (struct proc *proc, int will_modify) | |
360 | { | |
361 | int was_aborted = proc->aborted; | |
362 | ||
363 | proc_debug (proc, "updating state info%s", | |
364 | will_modify ? " (with intention to modify)" : ""); | |
365 | ||
366 | proc_abort (proc, will_modify); | |
367 | ||
c5aa993b | 368 | if (!was_aborted && proc->aborted) |
c906108c SS |
369 | /* PROC's state may have changed since we last fetched it. */ |
370 | proc->state_valid = 0; | |
371 | ||
c5aa993b | 372 | if (!proc->state_valid) |
c906108c SS |
373 | { |
374 | mach_msg_type_number_t state_size = THREAD_STATE_SIZE; | |
375 | error_t err = | |
c5aa993b | 376 | thread_get_state (proc->port, THREAD_STATE_FLAVOR, |
f75c77fc | 377 | (thread_state_t) &proc->state, &state_size); |
c906108c SS |
378 | proc_debug (proc, "getting thread state"); |
379 | proc->state_valid = !err; | |
380 | } | |
381 | ||
382 | if (proc->state_valid) | |
383 | { | |
384 | if (will_modify) | |
385 | proc->state_changed = 1; | |
f75c77fc | 386 | return (thread_state_t) &proc->state; |
c906108c SS |
387 | } |
388 | else | |
389 | return 0; | |
390 | } | |
942fd805 | 391 | |
c906108c SS |
392 | \f |
393 | /* Set PORT to PROC's exception port. */ | |
394 | error_t | |
c5aa993b | 395 | proc_get_exception_port (struct proc * proc, mach_port_t * port) |
c906108c SS |
396 | { |
397 | if (proc_is_task (proc)) | |
398 | return task_get_exception_port (proc->port, port); | |
399 | else | |
400 | return thread_get_exception_port (proc->port, port); | |
401 | } | |
402 | ||
403 | /* Set PROC's exception port to PORT. */ | |
404 | error_t | |
c5aa993b | 405 | proc_set_exception_port (struct proc * proc, mach_port_t port) |
c906108c SS |
406 | { |
407 | proc_debug (proc, "setting exception port: %d", port); | |
408 | if (proc_is_task (proc)) | |
409 | return task_set_exception_port (proc->port, port); | |
410 | else | |
411 | return thread_set_exception_port (proc->port, port); | |
412 | } | |
413 | ||
414 | /* Get PROC's exception port, cleaning up a bit if proc has died. */ | |
415 | static mach_port_t | |
416 | _proc_get_exc_port (struct proc *proc) | |
417 | { | |
418 | mach_port_t exc_port; | |
419 | error_t err = proc_get_exception_port (proc, &exc_port); | |
420 | ||
421 | if (err) | |
422 | /* PROC must be dead. */ | |
423 | { | |
424 | if (proc->exc_port) | |
425 | mach_port_deallocate (mach_task_self (), proc->exc_port); | |
426 | proc->exc_port = MACH_PORT_NULL; | |
427 | if (proc->saved_exc_port) | |
428 | mach_port_deallocate (mach_task_self (), proc->saved_exc_port); | |
429 | proc->saved_exc_port = MACH_PORT_NULL; | |
430 | } | |
431 | ||
432 | return exc_port; | |
433 | } | |
434 | ||
435 | /* Replace PROC's exception port with EXC_PORT, unless it's already been | |
436 | done. Stash away any existing exception port so we can restore it later. */ | |
437 | void | |
438 | proc_steal_exc_port (struct proc *proc, mach_port_t exc_port) | |
439 | { | |
440 | mach_port_t cur_exc_port = _proc_get_exc_port (proc); | |
441 | ||
442 | if (cur_exc_port) | |
443 | { | |
942fd805 | 444 | error_t err = 0; |
c906108c SS |
445 | |
446 | proc_debug (proc, "inserting exception port: %d", exc_port); | |
447 | ||
448 | if (cur_exc_port != exc_port) | |
449 | /* Put in our exception port. */ | |
450 | err = proc_set_exception_port (proc, exc_port); | |
451 | ||
452 | if (err || cur_exc_port == proc->exc_port) | |
453 | /* We previously set the exception port, and it's still set. So we | |
454 | just keep the old saved port which is what the proc set. */ | |
455 | { | |
456 | if (cur_exc_port) | |
457 | mach_port_deallocate (mach_task_self (), cur_exc_port); | |
458 | } | |
459 | else | |
460 | /* Keep a copy of PROC's old exception port so it can be restored. */ | |
461 | { | |
462 | if (proc->saved_exc_port) | |
463 | mach_port_deallocate (mach_task_self (), proc->saved_exc_port); | |
464 | proc->saved_exc_port = cur_exc_port; | |
465 | } | |
466 | ||
467 | proc_debug (proc, "saved exception port: %d", proc->saved_exc_port); | |
468 | ||
469 | if (!err) | |
470 | proc->exc_port = exc_port; | |
471 | else | |
8a3fe4f8 | 472 | warning (_("Error setting exception port for %s: %s"), |
dc672865 | 473 | proc_string (proc), safe_strerror (err)); |
c906108c SS |
474 | } |
475 | } | |
476 | ||
477 | /* If we previously replaced PROC's exception port, put back what we | |
478 | found there at the time, unless *our* exception port has since been | |
479 | overwritten, in which case who knows what's going on. */ | |
480 | void | |
481 | proc_restore_exc_port (struct proc *proc) | |
482 | { | |
483 | mach_port_t cur_exc_port = _proc_get_exc_port (proc); | |
484 | ||
485 | if (cur_exc_port) | |
486 | { | |
487 | error_t err = 0; | |
488 | ||
489 | proc_debug (proc, "restoring real exception port"); | |
490 | ||
491 | if (proc->exc_port == cur_exc_port) | |
492 | /* Our's is still there. */ | |
493 | err = proc_set_exception_port (proc, proc->saved_exc_port); | |
494 | ||
495 | if (proc->saved_exc_port) | |
496 | mach_port_deallocate (mach_task_self (), proc->saved_exc_port); | |
497 | proc->saved_exc_port = MACH_PORT_NULL; | |
498 | ||
499 | if (!err) | |
500 | proc->exc_port = MACH_PORT_NULL; | |
501 | else | |
8a3fe4f8 | 502 | warning (_("Error setting exception port for %s: %s"), |
dc672865 | 503 | proc_string (proc), safe_strerror (err)); |
c906108c SS |
504 | } |
505 | } | |
942fd805 | 506 | |
c906108c SS |
507 | \f |
508 | /* Turns hardware tracing in PROC on or off when SET is true or false, | |
509 | respectively. Returns true on success. */ | |
510 | int | |
511 | proc_trace (struct proc *proc, int set) | |
512 | { | |
513 | thread_state_t state = proc_get_state (proc, 1); | |
514 | ||
c5aa993b | 515 | if (!state) |
c906108c SS |
516 | return 0; /* the thread must be dead. */ |
517 | ||
518 | proc_debug (proc, "tracing %s", set ? "on" : "off"); | |
c5aa993b | 519 | |
c906108c SS |
520 | if (set) |
521 | { | |
522 | /* XXX We don't get the exception unless the thread has its own | |
c5aa993b | 523 | exception port???? */ |
c906108c SS |
524 | if (proc->exc_port == MACH_PORT_NULL) |
525 | proc_steal_exc_port (proc, proc->inf->event_port); | |
526 | THREAD_STATE_SET_TRACED (state); | |
527 | } | |
528 | else | |
529 | THREAD_STATE_CLEAR_TRACED (state); | |
530 | ||
531 | return 1; | |
532 | } | |
942fd805 | 533 | |
c906108c SS |
534 | \f |
535 | /* A variable from which to assign new TIDs. */ | |
536 | static int next_thread_id = 1; | |
537 | ||
538 | /* Returns a new proc structure with the given fields. Also adds a | |
539 | notification for PORT becoming dead to be sent to INF's notify port. */ | |
540 | struct proc * | |
541 | make_proc (struct inf *inf, mach_port_t port, int tid) | |
542 | { | |
543 | error_t err; | |
544 | mach_port_t prev_port = MACH_PORT_NULL; | |
3c37485b | 545 | struct proc *proc = xmalloc (sizeof (struct proc)); |
c906108c SS |
546 | |
547 | proc->port = port; | |
548 | proc->tid = tid; | |
549 | proc->inf = inf; | |
550 | proc->next = 0; | |
551 | proc->saved_exc_port = MACH_PORT_NULL; | |
552 | proc->exc_port = MACH_PORT_NULL; | |
553 | ||
554 | proc->sc = 0; | |
555 | proc->cur_sc = 0; | |
556 | ||
557 | /* Note that these are all the values for threads; the task simply uses the | |
558 | corresponding field in INF directly. */ | |
559 | proc->run_sc = inf->default_thread_run_sc; | |
560 | proc->pause_sc = inf->default_thread_pause_sc; | |
561 | proc->detach_sc = inf->default_thread_detach_sc; | |
562 | proc->resume_sc = proc->run_sc; | |
563 | ||
564 | proc->aborted = 0; | |
565 | proc->dead = 0; | |
566 | proc->state_valid = 0; | |
567 | proc->state_changed = 0; | |
568 | ||
569 | proc_debug (proc, "is new"); | |
570 | ||
571 | /* Get notified when things die. */ | |
572 | err = | |
c5aa993b | 573 | mach_port_request_notification (mach_task_self (), port, |
c906108c SS |
574 | MACH_NOTIFY_DEAD_NAME, 1, |
575 | inf->event_port, | |
576 | MACH_MSG_TYPE_MAKE_SEND_ONCE, | |
577 | &prev_port); | |
578 | if (err) | |
8a3fe4f8 | 579 | warning (_("Couldn't request notification for port %d: %s"), |
dc672865 | 580 | port, safe_strerror (err)); |
c906108c SS |
581 | else |
582 | { | |
583 | proc_debug (proc, "notifications to: %d", inf->event_port); | |
584 | if (prev_port != MACH_PORT_NULL) | |
585 | mach_port_deallocate (mach_task_self (), prev_port); | |
586 | } | |
587 | ||
588 | if (inf->want_exceptions) | |
942fd805 MK |
589 | { |
590 | if (proc_is_task (proc)) | |
591 | /* Make the task exception port point to us. */ | |
592 | proc_steal_exc_port (proc, inf->event_port); | |
593 | else | |
594 | /* Just clear thread exception ports -- they default to the | |
595 | task one. */ | |
596 | proc_steal_exc_port (proc, MACH_PORT_NULL); | |
597 | } | |
c906108c SS |
598 | |
599 | return proc; | |
600 | } | |
601 | ||
602 | /* Frees PROC and any resources it uses, and returns the value of PROC's | |
603 | next field. */ | |
604 | struct proc * | |
605 | _proc_free (struct proc *proc) | |
606 | { | |
607 | struct inf *inf = proc->inf; | |
608 | struct proc *next = proc->next; | |
609 | ||
610 | proc_debug (proc, "freeing..."); | |
611 | ||
612 | if (proc == inf->step_thread) | |
613 | /* Turn off single stepping. */ | |
614 | inf_set_step_thread (inf, 0); | |
615 | if (proc == inf->wait.thread) | |
616 | inf_clear_wait (inf); | |
617 | if (proc == inf->signal_thread) | |
618 | inf->signal_thread = 0; | |
619 | ||
620 | if (proc->port != MACH_PORT_NULL) | |
621 | { | |
622 | if (proc->exc_port != MACH_PORT_NULL) | |
623 | /* Restore the original exception port. */ | |
624 | proc_restore_exc_port (proc); | |
625 | if (proc->cur_sc != 0) | |
626 | /* Resume the thread/task. */ | |
627 | { | |
628 | proc->sc = 0; | |
629 | proc_update_sc (proc); | |
630 | } | |
631 | mach_port_deallocate (mach_task_self (), proc->port); | |
632 | } | |
633 | ||
b8c9b27d | 634 | xfree (proc); |
c906108c SS |
635 | return next; |
636 | } | |
942fd805 | 637 | |
c906108c | 638 | \f |
c5aa993b | 639 | struct inf * |
fba45db2 | 640 | make_inf (void) |
c906108c | 641 | { |
3c37485b | 642 | struct inf *inf = xmalloc (sizeof (struct inf)); |
c906108c SS |
643 | |
644 | inf->task = 0; | |
645 | inf->threads = 0; | |
646 | inf->threads_up_to_date = 0; | |
647 | inf->pid = 0; | |
648 | inf->wait.status.kind = TARGET_WAITKIND_SPURIOUS; | |
649 | inf->wait.thread = 0; | |
650 | inf->wait.exc.handler = MACH_PORT_NULL; | |
651 | inf->wait.exc.reply = MACH_PORT_NULL; | |
652 | inf->step_thread = 0; | |
653 | inf->signal_thread = 0; | |
654 | inf->event_port = MACH_PORT_NULL; | |
c906108c | 655 | inf->running = 0; |
cce74817 JM |
656 | inf->stopped = 0; |
657 | inf->nomsg = 1; | |
c906108c SS |
658 | inf->traced = 0; |
659 | inf->no_wait = 0; | |
660 | inf->pending_execs = 0; | |
661 | inf->pause_sc = 1; | |
662 | inf->detach_sc = 0; | |
663 | inf->default_thread_run_sc = 0; | |
664 | inf->default_thread_pause_sc = 0; | |
665 | inf->default_thread_detach_sc = 0; | |
666 | inf->want_signals = 1; /* By default */ | |
667 | inf->want_exceptions = 1; /* By default */ | |
668 | ||
669 | return inf; | |
670 | } | |
671 | ||
942fd805 | 672 | /* Clear INF's target wait status. */ |
c906108c SS |
673 | void |
674 | inf_clear_wait (struct inf *inf) | |
675 | { | |
676 | inf_debug (inf, "clearing wait"); | |
677 | inf->wait.status.kind = TARGET_WAITKIND_SPURIOUS; | |
678 | inf->wait.thread = 0; | |
679 | inf->wait.suppress = 0; | |
680 | if (inf->wait.exc.handler != MACH_PORT_NULL) | |
681 | { | |
682 | mach_port_deallocate (mach_task_self (), inf->wait.exc.handler); | |
683 | inf->wait.exc.handler = MACH_PORT_NULL; | |
684 | } | |
685 | if (inf->wait.exc.reply != MACH_PORT_NULL) | |
686 | { | |
687 | mach_port_deallocate (mach_task_self (), inf->wait.exc.reply); | |
688 | inf->wait.exc.reply = MACH_PORT_NULL; | |
689 | } | |
690 | } | |
942fd805 | 691 | |
c906108c SS |
692 | \f |
693 | void | |
694 | inf_cleanup (struct inf *inf) | |
695 | { | |
696 | inf_debug (inf, "cleanup"); | |
697 | ||
698 | inf_clear_wait (inf); | |
699 | ||
700 | inf_set_pid (inf, -1); | |
701 | inf->pid = 0; | |
cce74817 JM |
702 | inf->running = 0; |
703 | inf->stopped = 0; | |
704 | inf->nomsg = 1; | |
c906108c SS |
705 | inf->traced = 0; |
706 | inf->no_wait = 0; | |
c906108c SS |
707 | inf->pending_execs = 0; |
708 | ||
709 | if (inf->event_port) | |
710 | { | |
711 | mach_port_destroy (mach_task_self (), inf->event_port); | |
712 | inf->event_port = MACH_PORT_NULL; | |
713 | } | |
714 | } | |
715 | ||
716 | void | |
717 | inf_startup (struct inf *inf, int pid) | |
718 | { | |
719 | error_t err; | |
720 | ||
721 | inf_debug (inf, "startup: pid = %d", pid); | |
722 | ||
723 | inf_cleanup (inf); | |
724 | ||
725 | /* Make the port on which we receive all events. */ | |
726 | err = mach_port_allocate (mach_task_self (), | |
727 | MACH_PORT_RIGHT_RECEIVE, &inf->event_port); | |
728 | if (err) | |
8a3fe4f8 | 729 | error (_("Error allocating event port: %s"), safe_strerror (err)); |
c906108c SS |
730 | |
731 | /* Make a send right for it, so we can easily copy it for other people. */ | |
732 | mach_port_insert_right (mach_task_self (), inf->event_port, | |
733 | inf->event_port, MACH_MSG_TYPE_MAKE_SEND); | |
734 | inf_set_pid (inf, pid); | |
735 | } | |
942fd805 | 736 | |
c906108c | 737 | \f |
942fd805 | 738 | /* Close current process, if any, and attach INF to process PORT. */ |
c5aa993b | 739 | void |
c906108c SS |
740 | inf_set_pid (struct inf *inf, pid_t pid) |
741 | { | |
742 | task_t task_port; | |
743 | struct proc *task = inf->task; | |
744 | ||
745 | inf_debug (inf, "setting pid: %d", pid); | |
746 | ||
747 | if (pid < 0) | |
748 | task_port = MACH_PORT_NULL; | |
749 | else | |
750 | { | |
751 | error_t err = proc_pid2task (proc_server, pid, &task_port); | |
752 | if (err) | |
8a3fe4f8 | 753 | error (_("Error getting task for pid %d: %s"), pid, safe_strerror (err)); |
c906108c SS |
754 | } |
755 | ||
756 | inf_debug (inf, "setting task: %d", task_port); | |
757 | ||
758 | if (inf->pause_sc) | |
759 | task_suspend (task_port); | |
760 | ||
761 | if (task && task->port != task_port) | |
762 | { | |
763 | inf->task = 0; | |
764 | inf_validate_procs (inf); /* Trash all the threads. */ | |
765 | _proc_free (task); /* And the task. */ | |
766 | } | |
767 | ||
768 | if (task_port != MACH_PORT_NULL) | |
769 | { | |
770 | inf->task = make_proc (inf, task_port, PROC_TID_TASK); | |
771 | inf->threads_up_to_date = 0; | |
772 | } | |
773 | ||
774 | if (inf->task) | |
775 | { | |
776 | inf->pid = pid; | |
777 | if (inf->pause_sc) | |
942fd805 MK |
778 | /* Reflect task_suspend above. */ |
779 | inf->task->sc = inf->task->cur_sc = 1; | |
c906108c SS |
780 | } |
781 | else | |
782 | inf->pid = -1; | |
783 | } | |
942fd805 | 784 | |
c906108c | 785 | \f |
cce74817 JM |
786 | /* Validates INF's stopped, nomsg and traced field from the actual |
787 | proc server state. Note that the traced field is only updated from | |
788 | the proc server state if we do not have a message port. If we do | |
789 | have a message port we'd better look at the tracemask itself. */ | |
c906108c | 790 | static void |
cce74817 | 791 | inf_validate_procinfo (struct inf *inf) |
c906108c SS |
792 | { |
793 | char *noise; | |
794 | mach_msg_type_number_t noise_len = 0; | |
795 | struct procinfo *pi; | |
796 | mach_msg_type_number_t pi_len = 0; | |
797 | int info_flags = 0; | |
798 | error_t err = | |
c5aa993b | 799 | proc_getprocinfo (proc_server, inf->pid, &info_flags, |
f75c77fc | 800 | (procinfo_t *) &pi, &pi_len, &noise, &noise_len); |
c906108c | 801 | |
c5aa993b | 802 | if (!err) |
c906108c SS |
803 | { |
804 | inf->stopped = !!(pi->state & PI_STOPPED); | |
cce74817 JM |
805 | inf->nomsg = !!(pi->state & PI_NOMSG); |
806 | if (inf->nomsg) | |
807 | inf->traced = !!(pi->state & PI_TRACED); | |
c5aa993b | 808 | vm_deallocate (mach_task_self (), (vm_address_t) pi, pi_len); |
c906108c | 809 | if (noise_len > 0) |
c5aa993b | 810 | vm_deallocate (mach_task_self (), (vm_address_t) noise, noise_len); |
c906108c SS |
811 | } |
812 | } | |
813 | ||
f90b2b1d JK |
814 | /* Validates INF's task suspend count. If it's higher than we expect, |
815 | verify with the user before `stealing' the extra count. */ | |
c906108c SS |
816 | static void |
817 | inf_validate_task_sc (struct inf *inf) | |
818 | { | |
f90b2b1d JK |
819 | char *noise; |
820 | mach_msg_type_number_t noise_len = 0; | |
821 | struct procinfo *pi; | |
822 | mach_msg_type_number_t pi_len = 0; | |
823 | int info_flags = PI_FETCH_TASKINFO; | |
824 | int suspend_count = -1; | |
825 | error_t err; | |
c906108c | 826 | |
f90b2b1d JK |
827 | retry: |
828 | err = proc_getprocinfo (proc_server, inf->pid, &info_flags, | |
942fd805 | 829 | (procinfo_t *) &pi, &pi_len, &noise, &noise_len); |
c906108c | 830 | if (err) |
f90b2b1d JK |
831 | { |
832 | inf->task->dead = 1; /* oh well */ | |
833 | return; | |
834 | } | |
835 | ||
836 | if (inf->task->cur_sc < pi->taskinfo.suspend_count && suspend_count == -1) | |
837 | { | |
838 | /* The proc server might have suspended the task while stopping | |
839 | it. This happens when the task is handling a traced signal. | |
840 | Refetch the suspend count. The proc server should be | |
841 | finished stopping the task by now. */ | |
842 | suspend_count = pi->taskinfo.suspend_count; | |
843 | goto retry; | |
844 | } | |
845 | ||
846 | suspend_count = pi->taskinfo.suspend_count; | |
847 | ||
848 | vm_deallocate (mach_task_self (), (vm_address_t) pi, pi_len); | |
849 | if (noise_len > 0) | |
850 | vm_deallocate (mach_task_self (), (vm_address_t) pi, pi_len); | |
851 | ||
852 | if (inf->task->cur_sc < suspend_count) | |
c906108c SS |
853 | { |
854 | int abort; | |
855 | ||
856 | target_terminal_ours (); /* Allow I/O. */ | |
f90b2b1d JK |
857 | abort = !query ("Pid %d has an additional task suspend count of %d;" |
858 | " clear it? ", inf->pid, | |
859 | suspend_count - inf->task->cur_sc); | |
c5aa993b | 860 | target_terminal_inferior (); /* Give it back to the child. */ |
c906108c SS |
861 | |
862 | if (abort) | |
8a3fe4f8 | 863 | error (_("Additional task suspend count left untouched.")); |
c906108c | 864 | |
f90b2b1d | 865 | inf->task->cur_sc = suspend_count; |
c906108c SS |
866 | } |
867 | } | |
868 | ||
942fd805 MK |
869 | /* Turns tracing for INF on or off, depending on ON, unless it already |
870 | is. If INF is running, the resume_sc count of INF's threads will | |
871 | be modified, and the signal thread will briefly be run to change | |
872 | the trace state. */ | |
c906108c SS |
873 | void |
874 | inf_set_traced (struct inf *inf, int on) | |
875 | { | |
942fd805 MK |
876 | if (on == inf->traced) |
877 | return; | |
878 | ||
879 | if (inf->task && !inf->task->dead) | |
880 | /* Make it take effect immediately. */ | |
881 | { | |
882 | sigset_t mask = on ? ~(sigset_t) 0 : 0; | |
883 | error_t err = | |
c5aa993b | 884 | INF_RESUME_MSGPORT_RPC (inf, msg_set_init_int (msgport, refport, |
942fd805 MK |
885 | INIT_TRACEMASK, mask)); |
886 | if (err == EIEIO) | |
887 | { | |
888 | if (on) | |
8a3fe4f8 | 889 | warning (_("Can't modify tracing state for pid %d: %s"), |
942fd805 | 890 | inf->pid, "No signal thread"); |
c906108c | 891 | inf->traced = on; |
942fd805 MK |
892 | } |
893 | else if (err) | |
8a3fe4f8 | 894 | warning (_("Can't modify tracing state for pid %d: %s"), |
dc672865 | 895 | inf->pid, safe_strerror (err)); |
942fd805 MK |
896 | else |
897 | inf->traced = on; | |
898 | } | |
899 | else | |
900 | inf->traced = on; | |
c906108c | 901 | } |
942fd805 | 902 | |
c906108c | 903 | \f |
942fd805 MK |
904 | /* Makes all the real suspend count deltas of all the procs in INF |
905 | match the desired values. Careful to always do thread/task suspend | |
906 | counts in the safe order. Returns true if at least one thread is | |
907 | thought to be running. */ | |
c906108c SS |
908 | int |
909 | inf_update_suspends (struct inf *inf) | |
910 | { | |
911 | struct proc *task = inf->task; | |
912 | /* We don't have to update INF->threads even though we're iterating over it | |
913 | because we'll change a thread only if it already has an existing proc | |
914 | entry. */ | |
915 | ||
916 | inf_debug (inf, "updating suspend counts"); | |
917 | ||
918 | if (task) | |
919 | { | |
920 | struct proc *thread; | |
921 | int task_running = (task->sc == 0), thread_running = 0; | |
922 | ||
923 | if (task->sc > task->cur_sc) | |
924 | /* The task is becoming _more_ suspended; do before any threads. */ | |
925 | task_running = proc_update_sc (task); | |
926 | ||
927 | if (inf->pending_execs) | |
928 | /* When we're waiting for an exec, things may be happening behind our | |
929 | back, so be conservative. */ | |
930 | thread_running = 1; | |
931 | ||
932 | /* Do all the thread suspend counts. */ | |
933 | for (thread = inf->threads; thread; thread = thread->next) | |
934 | thread_running |= proc_update_sc (thread); | |
935 | ||
936 | if (task->sc != task->cur_sc) | |
937 | /* We didn't do the task first, because we wanted to wait for the | |
938 | threads; do it now. */ | |
939 | task_running = proc_update_sc (task); | |
940 | ||
941 | inf_debug (inf, "%srunning...", | |
942 | (thread_running && task_running) ? "" : "not "); | |
943 | ||
944 | inf->running = thread_running && task_running; | |
945 | ||
946 | /* Once any thread has executed some code, we can't depend on the | |
c5aa993b | 947 | threads list any more. */ |
c906108c SS |
948 | if (inf->running) |
949 | inf->threads_up_to_date = 0; | |
950 | ||
951 | return inf->running; | |
952 | } | |
953 | ||
954 | return 0; | |
955 | } | |
942fd805 | 956 | |
c906108c SS |
957 | \f |
958 | /* Converts a GDB pid to a struct proc. */ | |
959 | struct proc * | |
960 | inf_tid_to_thread (struct inf *inf, int tid) | |
961 | { | |
962 | struct proc *thread = inf->threads; | |
963 | ||
964 | while (thread) | |
965 | if (thread->tid == tid) | |
966 | return thread; | |
967 | else | |
968 | thread = thread->next; | |
969 | return 0; | |
970 | } | |
971 | ||
972 | /* Converts a thread port to a struct proc. */ | |
973 | struct proc * | |
974 | inf_port_to_thread (struct inf *inf, mach_port_t port) | |
975 | { | |
976 | struct proc *thread = inf->threads; | |
977 | while (thread) | |
978 | if (thread->port == port) | |
979 | return thread; | |
980 | else | |
981 | thread = thread->next; | |
982 | return 0; | |
983 | } | |
942fd805 | 984 | |
c906108c SS |
985 | \f |
986 | /* Make INF's list of threads be consistent with reality of TASK. */ | |
987 | void | |
988 | inf_validate_procs (struct inf *inf) | |
989 | { | |
c906108c | 990 | thread_array_t threads; |
942fd805 | 991 | mach_msg_type_number_t num_threads, i; |
c906108c SS |
992 | struct proc *task = inf->task; |
993 | ||
994 | /* If no threads are currently running, this function will guarantee that | |
995 | things are up to date. The exception is if there are zero threads -- | |
996 | then it is almost certainly in an odd state, and probably some outside | |
997 | agent will create threads. */ | |
998 | inf->threads_up_to_date = inf->threads ? !inf->running : 0; | |
999 | ||
1000 | if (task) | |
1001 | { | |
1002 | error_t err = task_threads (task->port, &threads, &num_threads); | |
1003 | inf_debug (inf, "fetching threads"); | |
1004 | if (err) | |
1005 | /* TASK must be dead. */ | |
1006 | { | |
1007 | task->dead = 1; | |
1008 | task = 0; | |
1009 | } | |
1010 | } | |
1011 | ||
1012 | if (!task) | |
1013 | { | |
1014 | num_threads = 0; | |
1015 | inf_debug (inf, "no task"); | |
1016 | } | |
1017 | ||
1018 | { | |
942fd805 MK |
1019 | /* Make things normally linear. */ |
1020 | mach_msg_type_number_t search_start = 0; | |
c906108c SS |
1021 | /* Which thread in PROCS corresponds to each task thread, & the task. */ |
1022 | struct proc *matched[num_threads + 1]; | |
1023 | /* The last thread in INF->threads, so we can add to the end. */ | |
1024 | struct proc *last = 0; | |
1025 | /* The current thread we're considering. */ | |
1026 | struct proc *thread = inf->threads; | |
1027 | ||
4deab737 | 1028 | memset (matched, 0, sizeof (matched)); |
c906108c SS |
1029 | |
1030 | while (thread) | |
1031 | { | |
942fd805 | 1032 | mach_msg_type_number_t left; |
c906108c SS |
1033 | |
1034 | for (i = search_start, left = num_threads; left; i++, left--) | |
1035 | { | |
1036 | if (i >= num_threads) | |
c5aa993b | 1037 | i -= num_threads; /* I wrapped around. */ |
c906108c SS |
1038 | if (thread->port == threads[i]) |
1039 | /* We already know about this thread. */ | |
1040 | { | |
1041 | matched[i] = thread; | |
1042 | last = thread; | |
1043 | thread = thread->next; | |
1044 | search_start++; | |
1045 | break; | |
1046 | } | |
1047 | } | |
1048 | ||
c5aa993b | 1049 | if (!left) |
c906108c SS |
1050 | { |
1051 | proc_debug (thread, "died!"); | |
1052 | thread->port = MACH_PORT_NULL; | |
c5aa993b | 1053 | thread = _proc_free (thread); /* THREAD is dead. */ |
c4c50d37 DJ |
1054 | if (last) |
1055 | last->next = thread; | |
1056 | else | |
1057 | inf->threads = thread; | |
c906108c SS |
1058 | } |
1059 | } | |
1060 | ||
1061 | for (i = 0; i < num_threads; i++) | |
942fd805 MK |
1062 | { |
1063 | if (matched[i]) | |
1064 | /* Throw away the duplicate send right. */ | |
1065 | mach_port_deallocate (mach_task_self (), threads[i]); | |
1066 | else | |
1067 | /* THREADS[I] is a thread we don't know about yet! */ | |
1068 | { | |
617fd3b5 PA |
1069 | ptid_t ptid; |
1070 | ||
942fd805 | 1071 | thread = make_proc (inf, threads[i], next_thread_id++); |
c4c50d37 DJ |
1072 | if (last) |
1073 | last->next = thread; | |
1074 | else | |
1075 | inf->threads = thread; | |
942fd805 MK |
1076 | last = thread; |
1077 | proc_debug (thread, "new thread: %d", threads[i]); | |
617fd3b5 PA |
1078 | |
1079 | ptid = ptid_build (inf->pid, 0, thread->tid); | |
1080 | ||
1081 | /* Tell GDB's generic thread code. */ | |
1082 | ||
1083 | if (ptid_equal (inferior_ptid, pid_to_ptid (inf->pid))) | |
1084 | /* This is the first time we're hearing about thread | |
1085 | ids, after a fork-child. */ | |
1086 | thread_change_ptid (inferior_ptid, ptid); | |
1087 | else if (inf->pending_execs != 0) | |
1088 | /* This is a shell thread. */ | |
1089 | add_thread_silent (ptid); | |
1090 | else | |
1091 | add_thread (ptid); | |
942fd805 MK |
1092 | } |
1093 | } | |
c906108c | 1094 | |
c5aa993b | 1095 | vm_deallocate (mach_task_self (), |
942fd805 | 1096 | (vm_address_t) threads, (num_threads * sizeof (thread_t))); |
c906108c SS |
1097 | } |
1098 | } | |
942fd805 | 1099 | |
c906108c SS |
1100 | \f |
1101 | /* Makes sure that INF's thread list is synced with the actual process. */ | |
39efb398 | 1102 | int |
c906108c SS |
1103 | inf_update_procs (struct inf *inf) |
1104 | { | |
c5aa993b | 1105 | if (!inf->task) |
c906108c | 1106 | return 0; |
c5aa993b | 1107 | if (!inf->threads_up_to_date) |
c906108c SS |
1108 | inf_validate_procs (inf); |
1109 | return !!inf->task; | |
1110 | } | |
1111 | ||
1112 | /* Sets the resume_sc of each thread in inf. That of RUN_THREAD is set to 0, | |
1113 | and others are set to their run_sc if RUN_OTHERS is true, and otherwise | |
1114 | their pause_sc. */ | |
39efb398 | 1115 | void |
c906108c SS |
1116 | inf_set_threads_resume_sc (struct inf *inf, |
1117 | struct proc *run_thread, int run_others) | |
1118 | { | |
1119 | struct proc *thread; | |
1120 | inf_update_procs (inf); | |
1121 | for (thread = inf->threads; thread; thread = thread->next) | |
1122 | if (thread == run_thread) | |
1123 | thread->resume_sc = 0; | |
1124 | else if (run_others) | |
1125 | thread->resume_sc = thread->run_sc; | |
1126 | else | |
1127 | thread->resume_sc = thread->pause_sc; | |
1128 | } | |
942fd805 | 1129 | |
c906108c SS |
1130 | \f |
1131 | /* Cause INF to continue execution immediately; individual threads may still | |
1132 | be suspended (but their suspend counts will be updated). */ | |
39efb398 | 1133 | void |
c906108c SS |
1134 | inf_resume (struct inf *inf) |
1135 | { | |
1136 | struct proc *thread; | |
1137 | ||
1138 | inf_update_procs (inf); | |
1139 | ||
1140 | for (thread = inf->threads; thread; thread = thread->next) | |
1141 | thread->sc = thread->resume_sc; | |
1142 | ||
1143 | if (inf->task) | |
1144 | { | |
c5aa993b | 1145 | if (!inf->pending_execs) |
c906108c SS |
1146 | /* Try to make sure our task count is correct -- in the case where |
1147 | we're waiting for an exec though, things are too volatile, so just | |
1148 | assume things will be reasonable (which they usually will be). */ | |
1149 | inf_validate_task_sc (inf); | |
1150 | inf->task->sc = 0; | |
1151 | } | |
1152 | ||
1153 | inf_update_suspends (inf); | |
1154 | } | |
1155 | ||
1156 | /* Cause INF to stop execution immediately; individual threads may still | |
1157 | be running. */ | |
39efb398 | 1158 | void |
c906108c SS |
1159 | inf_suspend (struct inf *inf) |
1160 | { | |
1161 | struct proc *thread; | |
1162 | ||
1163 | inf_update_procs (inf); | |
1164 | ||
1165 | for (thread = inf->threads; thread; thread = thread->next) | |
1166 | thread->sc = thread->pause_sc; | |
1167 | ||
1168 | if (inf->task) | |
1169 | inf->task->sc = inf->pause_sc; | |
1170 | ||
1171 | inf_update_suspends (inf); | |
1172 | } | |
942fd805 | 1173 | |
c906108c | 1174 | \f |
942fd805 MK |
1175 | /* INF has one thread PROC that is in single-stepping mode. This |
1176 | function changes it to be PROC, changing any old step_thread to be | |
1177 | a normal one. A PROC of 0 clears any existing value. */ | |
c906108c SS |
1178 | void |
1179 | inf_set_step_thread (struct inf *inf, struct proc *thread) | |
1180 | { | |
bf62e5b4 | 1181 | gdb_assert (!thread || proc_is_thread (thread)); |
c906108c SS |
1182 | |
1183 | if (thread) | |
1184 | inf_debug (inf, "setting step thread: %d/%d", inf->pid, thread->tid); | |
1185 | else | |
1186 | inf_debug (inf, "clearing step thread"); | |
1187 | ||
1188 | if (inf->step_thread != thread) | |
1189 | { | |
1190 | if (inf->step_thread && inf->step_thread->port != MACH_PORT_NULL) | |
c5aa993b | 1191 | if (!proc_trace (inf->step_thread, 0)) |
c906108c SS |
1192 | return; |
1193 | if (thread && proc_trace (thread, 1)) | |
1194 | inf->step_thread = thread; | |
1195 | else | |
1196 | inf->step_thread = 0; | |
1197 | } | |
1198 | } | |
942fd805 | 1199 | |
c906108c SS |
1200 | \f |
1201 | /* Set up the thread resume_sc's so that only the signal thread is running | |
1202 | (plus whatever other thread are set to always run). Returns true if we | |
1203 | did so, or false if we can't find a signal thread. */ | |
39efb398 | 1204 | int |
c906108c SS |
1205 | inf_set_threads_resume_sc_for_signal_thread (struct inf *inf) |
1206 | { | |
1207 | if (inf->signal_thread) | |
1208 | { | |
1209 | inf_set_threads_resume_sc (inf, inf->signal_thread, 0); | |
1210 | return 1; | |
1211 | } | |
1212 | else | |
1213 | return 0; | |
1214 | } | |
1215 | ||
1216 | static void | |
1217 | inf_update_signal_thread (struct inf *inf) | |
1218 | { | |
1219 | /* XXX for now we assume that if there's a msgport, the 2nd thread is | |
1220 | the signal thread. */ | |
1221 | inf->signal_thread = inf->threads ? inf->threads->next : 0; | |
1222 | } | |
942fd805 | 1223 | |
c906108c SS |
1224 | \f |
1225 | /* Detachs from INF's inferior task, letting it run once again... */ | |
1226 | void | |
1227 | inf_detach (struct inf *inf) | |
1228 | { | |
1229 | struct proc *task = inf->task; | |
1230 | ||
1231 | inf_debug (inf, "detaching..."); | |
1232 | ||
1233 | inf_clear_wait (inf); | |
1234 | inf_set_step_thread (inf, 0); | |
1235 | ||
1236 | if (task) | |
1237 | { | |
1238 | struct proc *thread; | |
1239 | ||
cce74817 JM |
1240 | inf_validate_procinfo (inf); |
1241 | ||
c906108c SS |
1242 | inf_set_traced (inf, 0); |
1243 | if (inf->stopped) | |
cce74817 JM |
1244 | { |
1245 | if (inf->nomsg) | |
1246 | inf_continue (inf); | |
1247 | else | |
1248 | inf_signal (inf, TARGET_SIGNAL_0); | |
1249 | } | |
c906108c SS |
1250 | |
1251 | proc_restore_exc_port (task); | |
1252 | task->sc = inf->detach_sc; | |
1253 | ||
1254 | for (thread = inf->threads; thread; thread = thread->next) | |
1255 | { | |
1256 | proc_restore_exc_port (thread); | |
1257 | thread->sc = thread->detach_sc; | |
1258 | } | |
1259 | ||
1260 | inf_update_suspends (inf); | |
1261 | } | |
1262 | ||
1263 | inf_cleanup (inf); | |
1264 | } | |
1265 | ||
942fd805 MK |
1266 | /* Attaches INF to the process with process id PID, returning it in a |
1267 | suspended state suitable for debugging. */ | |
c906108c SS |
1268 | void |
1269 | inf_attach (struct inf *inf, int pid) | |
1270 | { | |
1271 | inf_debug (inf, "attaching: %d", pid); | |
1272 | ||
1273 | if (inf->pid) | |
1274 | inf_detach (inf); | |
1275 | ||
1276 | inf_startup (inf, pid); | |
1277 | } | |
942fd805 | 1278 | |
c906108c SS |
1279 | \f |
1280 | /* Makes sure that we've got our exception ports entrenched in the process. */ | |
c5aa993b JM |
1281 | void |
1282 | inf_steal_exc_ports (struct inf *inf) | |
c906108c SS |
1283 | { |
1284 | struct proc *thread; | |
1285 | ||
1286 | inf_debug (inf, "stealing exception ports"); | |
1287 | ||
1288 | inf_set_step_thread (inf, 0); /* The step thread is special. */ | |
1289 | ||
1290 | proc_steal_exc_port (inf->task, inf->event_port); | |
1291 | for (thread = inf->threads; thread; thread = thread->next) | |
1292 | proc_steal_exc_port (thread, MACH_PORT_NULL); | |
1293 | } | |
1294 | ||
1295 | /* Makes sure the process has its own exception ports. */ | |
c5aa993b JM |
1296 | void |
1297 | inf_restore_exc_ports (struct inf *inf) | |
c906108c SS |
1298 | { |
1299 | struct proc *thread; | |
1300 | ||
1301 | inf_debug (inf, "restoring exception ports"); | |
1302 | ||
1303 | inf_set_step_thread (inf, 0); /* The step thread is special. */ | |
1304 | ||
1305 | proc_restore_exc_port (inf->task); | |
1306 | for (thread = inf->threads; thread; thread = thread->next) | |
1307 | proc_restore_exc_port (thread); | |
1308 | } | |
942fd805 | 1309 | |
c906108c SS |
1310 | \f |
1311 | /* Deliver signal SIG to INF. If INF is stopped, delivering a signal, even | |
1312 | signal 0, will continue it. INF is assumed to be in a paused state, and | |
1313 | the resume_sc's of INF's threads may be affected. */ | |
1314 | void | |
1315 | inf_signal (struct inf *inf, enum target_signal sig) | |
1316 | { | |
1317 | error_t err = 0; | |
1318 | int host_sig = target_signal_to_host (sig); | |
1319 | ||
1320 | #define NAME target_signal_to_name (sig) | |
1321 | ||
1322 | if (host_sig >= _NSIG) | |
1323 | /* A mach exception. Exceptions are encoded in the signal space by | |
1324 | putting them after _NSIG; this assumes they're positive (and not | |
1325 | extremely large)! */ | |
1326 | { | |
1327 | struct inf_wait *w = &inf->wait; | |
1328 | if (w->status.kind == TARGET_WAITKIND_STOPPED | |
1329 | && w->status.value.sig == sig | |
1330 | && w->thread && !w->thread->aborted) | |
1331 | /* We're passing through the last exception we received. This is | |
1332 | kind of bogus, because exceptions are per-thread whereas gdb | |
1333 | treats signals as per-process. We just forward the exception to | |
1334 | the correct handler, even it's not for the same thread as TID -- | |
1335 | i.e., we pretend it's global. */ | |
1336 | { | |
1337 | struct exc_state *e = &w->exc; | |
1338 | inf_debug (inf, "passing through exception:" | |
1339 | " task = %d, thread = %d, exc = %d" | |
1340 | ", code = %d, subcode = %d", | |
1341 | w->thread->port, inf->task->port, | |
1342 | e->exception, e->code, e->subcode); | |
1343 | err = | |
1344 | exception_raise_request (e->handler, | |
1345 | e->reply, MACH_MSG_TYPE_MOVE_SEND_ONCE, | |
1346 | w->thread->port, inf->task->port, | |
1347 | e->exception, e->code, e->subcode); | |
1348 | } | |
1349 | else | |
8a3fe4f8 | 1350 | error (_("Can't forward spontaneous exception (%s)."), NAME); |
c906108c SS |
1351 | } |
1352 | else | |
1353 | /* A Unix signal. */ | |
c5aa993b JM |
1354 | if (inf->stopped) |
1355 | /* The process is stopped and expecting a signal. Just send off a | |
1356 | request and let it get handled when we resume everything. */ | |
1357 | { | |
1358 | inf_debug (inf, "sending %s to stopped process", NAME); | |
1359 | err = | |
1360 | INF_MSGPORT_RPC (inf, | |
1361 | msg_sig_post_untraced_request (msgport, | |
1362 | inf->event_port, | |
1363 | MACH_MSG_TYPE_MAKE_SEND_ONCE, | |
1364 | host_sig, 0, | |
1365 | refport)); | |
1366 | if (!err) | |
1367 | /* Posting an untraced signal automatically continues it. | |
1368 | We clear this here rather than when we get the reply | |
1369 | because we'd rather assume it's not stopped when it | |
1370 | actually is, than the reverse. */ | |
1371 | inf->stopped = 0; | |
1372 | } | |
1373 | else | |
1374 | /* It's not expecting it. We have to let just the signal thread | |
1375 | run, and wait for it to get into a reasonable state before we | |
1376 | can continue the rest of the process. When we finally resume the | |
1377 | process the signal we request will be the very first thing that | |
1378 | happens. */ | |
1379 | { | |
942fd805 MK |
1380 | inf_debug (inf, "sending %s to unstopped process" |
1381 | " (so resuming signal thread)", NAME); | |
c5aa993b | 1382 | err = |
942fd805 MK |
1383 | INF_RESUME_MSGPORT_RPC (inf, |
1384 | msg_sig_post_untraced (msgport, host_sig, | |
1385 | 0, refport)); | |
c5aa993b | 1386 | } |
c906108c SS |
1387 | |
1388 | if (err == EIEIO) | |
1389 | /* Can't do too much... */ | |
8a3fe4f8 | 1390 | warning (_("Can't deliver signal %s: No signal thread."), NAME); |
c906108c | 1391 | else if (err) |
8a3fe4f8 | 1392 | warning (_("Delivering signal %s: %s"), NAME, safe_strerror (err)); |
c906108c SS |
1393 | |
1394 | #undef NAME | |
1395 | } | |
942fd805 | 1396 | |
c906108c | 1397 | \f |
cce74817 JM |
1398 | /* Continue INF without delivering a signal. This is meant to be used |
1399 | when INF does not have a message port. */ | |
1400 | void | |
1401 | inf_continue (struct inf *inf) | |
1402 | { | |
1403 | process_t proc; | |
1404 | error_t err = proc_pid2proc (proc_server, inf->pid, &proc); | |
1405 | ||
c5aa993b | 1406 | if (!err) |
cce74817 JM |
1407 | { |
1408 | inf_debug (inf, "continuing process"); | |
1409 | ||
1410 | err = proc_mark_cont (proc); | |
c5aa993b | 1411 | if (!err) |
cce74817 JM |
1412 | { |
1413 | struct proc *thread; | |
1414 | ||
1415 | for (thread = inf->threads; thread; thread = thread->next) | |
1416 | thread_resume (thread->port); | |
c5aa993b | 1417 | |
cce74817 JM |
1418 | inf->stopped = 0; |
1419 | } | |
1420 | } | |
1421 | ||
1422 | if (err) | |
8a3fe4f8 | 1423 | warning (_("Can't continue process: %s"), safe_strerror (err)); |
cce74817 | 1424 | } |
942fd805 | 1425 | |
cce74817 | 1426 | \f |
c906108c | 1427 | /* The inferior used for all gdb target ops. */ |
c289427b | 1428 | struct inf *gnu_current_inf = 0; |
c906108c SS |
1429 | |
1430 | /* The inferior being waited for by gnu_wait. Since GDB is decidely not | |
1431 | multi-threaded, we don't bother to lock this. */ | |
1432 | struct inf *waiting_inf; | |
1433 | ||
1434 | /* Wait for something to happen in the inferior, returning what in STATUS. */ | |
39f77062 | 1435 | static ptid_t |
617fd3b5 | 1436 | gnu_wait (ptid_t ptid, struct target_waitstatus *status) |
c906108c | 1437 | { |
c5aa993b JM |
1438 | struct msg |
1439 | { | |
1440 | mach_msg_header_t hdr; | |
1441 | mach_msg_type_t type; | |
1442 | int data[8000]; | |
942fd805 | 1443 | } msg; |
c906108c SS |
1444 | error_t err; |
1445 | struct proc *thread; | |
c289427b | 1446 | struct inf *inf = gnu_current_inf; |
c906108c | 1447 | |
942fd805 MK |
1448 | extern int exc_server (mach_msg_header_t *, mach_msg_header_t *); |
1449 | extern int msg_reply_server (mach_msg_header_t *, mach_msg_header_t *); | |
1450 | extern int notify_server (mach_msg_header_t *, mach_msg_header_t *); | |
1451 | extern int process_reply_server (mach_msg_header_t *, mach_msg_header_t *); | |
1452 | ||
bf62e5b4 | 1453 | gdb_assert (inf->task); |
c906108c SS |
1454 | |
1455 | if (!inf->threads && !inf->pending_execs) | |
1456 | /* No threads! Assume that maybe some outside agency is frobbing our | |
1457 | task, and really look for new threads. If we can't find any, just tell | |
1458 | the user to try again later. */ | |
1459 | { | |
1460 | inf_validate_procs (inf); | |
1461 | if (!inf->threads && !inf->task->dead) | |
8a3fe4f8 | 1462 | error (_("There are no threads; try again later.")); |
c906108c SS |
1463 | } |
1464 | ||
1465 | waiting_inf = inf; | |
1466 | ||
617fd3b5 | 1467 | inf_debug (inf, "waiting for: %s", target_pid_to_str (ptid)); |
c906108c | 1468 | |
c5aa993b | 1469 | rewait: |
c906108c SS |
1470 | if (proc_wait_pid != inf->pid && !inf->no_wait) |
1471 | /* Always get information on events from the proc server. */ | |
1472 | { | |
1473 | inf_debug (inf, "requesting wait on pid %d", inf->pid); | |
1474 | ||
1475 | if (proc_wait_pid) | |
1476 | /* The proc server is single-threaded, and only allows a single | |
1477 | outstanding wait request, so we have to cancel the previous one. */ | |
1478 | { | |
1479 | inf_debug (inf, "cancelling previous wait on pid %d", proc_wait_pid); | |
1480 | interrupt_operation (proc_server, 0); | |
1481 | } | |
1482 | ||
1483 | err = | |
1484 | proc_wait_request (proc_server, inf->event_port, inf->pid, WUNTRACED); | |
1485 | if (err) | |
8a3fe4f8 | 1486 | warning (_("wait request failed: %s"), safe_strerror (err)); |
c906108c SS |
1487 | else |
1488 | { | |
1489 | inf_debug (inf, "waits pending: %d", proc_waits_pending); | |
1490 | proc_wait_pid = inf->pid; | |
942fd805 MK |
1491 | /* Even if proc_waits_pending was > 0 before, we still won't |
1492 | get any other replies, because it was either from a | |
1493 | different INF, or a different process attached to INF -- | |
1494 | and the event port, which is the wait reply port, changes | |
1495 | when you switch processes. */ | |
c906108c SS |
1496 | proc_waits_pending = 1; |
1497 | } | |
1498 | } | |
1499 | ||
1500 | inf_clear_wait (inf); | |
1501 | ||
1502 | /* What can happen? (1) Dead name notification; (2) Exceptions arrive; | |
1503 | (3) wait reply from the proc server. */ | |
1504 | ||
1505 | inf_debug (inf, "waiting for an event..."); | |
1506 | err = mach_msg (&msg.hdr, MACH_RCV_MSG | MACH_RCV_INTERRUPT, | |
1507 | 0, sizeof (struct msg), inf->event_port, | |
1508 | MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL); | |
1509 | ||
1510 | /* Re-suspend the task. */ | |
1511 | inf_suspend (inf); | |
1512 | ||
1513 | if (!inf->task && inf->pending_execs) | |
1514 | /* When doing an exec, it's possible that the old task wasn't reused | |
1515 | (e.g., setuid execs). So if the task seems to have disappeared, | |
1516 | attempt to refetch it, as the pid should still be the same. */ | |
1517 | inf_set_pid (inf, inf->pid); | |
1518 | ||
1519 | if (err == EMACH_RCV_INTERRUPTED) | |
1520 | inf_debug (inf, "interrupted"); | |
1521 | else if (err) | |
8a3fe4f8 | 1522 | error (_("Couldn't wait for an event: %s"), safe_strerror (err)); |
c906108c SS |
1523 | else |
1524 | { | |
c5aa993b JM |
1525 | struct |
1526 | { | |
1527 | mach_msg_header_t hdr; | |
1528 | mach_msg_type_t err_type; | |
1529 | kern_return_t err; | |
1530 | char noise[200]; | |
1531 | } | |
1532 | reply; | |
c906108c SS |
1533 | |
1534 | inf_debug (inf, "event: msgid = %d", msg.hdr.msgh_id); | |
1535 | ||
1536 | /* Handle what we got. */ | |
c5aa993b JM |
1537 | if (!notify_server (&msg.hdr, &reply.hdr) |
1538 | && !exc_server (&msg.hdr, &reply.hdr) | |
1539 | && !process_reply_server (&msg.hdr, &reply.hdr) | |
1540 | && !msg_reply_server (&msg.hdr, &reply.hdr)) | |
c906108c | 1541 | /* Whatever it is, it's something strange. */ |
8a3fe4f8 | 1542 | error (_("Got a strange event, msg id = %d."), msg.hdr.msgh_id); |
c906108c SS |
1543 | |
1544 | if (reply.err) | |
8a3fe4f8 | 1545 | error (_("Handling event, msgid = %d: %s"), |
dc672865 | 1546 | msg.hdr.msgh_id, safe_strerror (reply.err)); |
c906108c SS |
1547 | } |
1548 | ||
1549 | if (inf->pending_execs) | |
1550 | /* We're waiting for the inferior to finish execing. */ | |
1551 | { | |
1552 | struct inf_wait *w = &inf->wait; | |
1553 | enum target_waitkind kind = w->status.kind; | |
1554 | ||
1555 | if (kind == TARGET_WAITKIND_SPURIOUS) | |
1556 | /* Since gdb is actually counting the number of times the inferior | |
1557 | stops, expecting one stop per exec, we only return major events | |
1558 | while execing. */ | |
1559 | { | |
1560 | w->suppress = 1; | |
1561 | inf_debug (inf, "pending_execs = %d, ignoring minor event", | |
1562 | inf->pending_execs); | |
1563 | } | |
1564 | else if (kind == TARGET_WAITKIND_STOPPED | |
1565 | && w->status.value.sig == TARGET_SIGNAL_TRAP) | |
1566 | /* Ah hah! A SIGTRAP from the inferior while starting up probably | |
1567 | means we've succesfully completed an exec! */ | |
1568 | { | |
1569 | if (--inf->pending_execs == 0) | |
1570 | /* We're done! */ | |
1571 | { | |
c5aa993b | 1572 | #if 0 /* do we need this? */ |
c906108c | 1573 | prune_threads (1); /* Get rid of the old shell threads */ |
c5aa993b | 1574 | renumber_threads (0); /* Give our threads reasonable names. */ |
c906108c SS |
1575 | #endif |
1576 | } | |
1577 | inf_debug (inf, "pending exec completed, pending_execs => %d", | |
1578 | inf->pending_execs); | |
1579 | } | |
1580 | else if (kind == TARGET_WAITKIND_STOPPED) | |
1581 | /* It's possible that this signal is because of a crashed process | |
1582 | being handled by the hurd crash server; in this case, the process | |
1583 | will have an extra task suspend, which we need to know about. | |
1584 | Since the code in inf_resume that normally checks for this is | |
1585 | disabled while INF->pending_execs, we do the check here instead. */ | |
1586 | inf_validate_task_sc (inf); | |
1587 | } | |
1588 | ||
1589 | if (inf->wait.suppress) | |
1590 | /* Some totally spurious event happened that we don't consider | |
1591 | worth returning to gdb. Just keep waiting. */ | |
1592 | { | |
1593 | inf_debug (inf, "suppressing return, rewaiting..."); | |
1594 | inf_resume (inf); | |
1595 | goto rewait; | |
1596 | } | |
1597 | ||
1598 | /* Pass back out our results. */ | |
98d346c3 | 1599 | memcpy (status, &inf->wait.status, sizeof (*status)); |
c906108c SS |
1600 | |
1601 | thread = inf->wait.thread; | |
1602 | if (thread) | |
617fd3b5 PA |
1603 | ptid = ptid_build (inf->pid, 0, thread->tid); |
1604 | else if (ptid_equal (ptid, minus_one_ptid)) | |
1605 | thread = inf_tid_to_thread (inf, -1); | |
c906108c | 1606 | else |
617fd3b5 | 1607 | thread = inf_tid_to_thread (inf, ptid_get_tid (ptid)); |
c906108c SS |
1608 | |
1609 | if (!thread || thread->port == MACH_PORT_NULL) | |
942fd805 MK |
1610 | { |
1611 | /* TID is dead; try and find a new thread. */ | |
1612 | if (inf_update_procs (inf) && inf->threads) | |
617fd3b5 | 1613 | ptid = ptid_build (inf->pid, 0, inf->threads->tid); /* The first available thread. */ |
942fd805 | 1614 | else |
617fd3b5 | 1615 | ptid = inferior_ptid; /* let wait_for_inferior handle exit case */ |
942fd805 | 1616 | } |
c906108c | 1617 | |
617fd3b5 PA |
1618 | if (thread |
1619 | && !ptid_equal (ptid, minus_one_ptid) | |
1620 | && status->kind != TARGET_WAITKIND_SPURIOUS | |
c906108c | 1621 | && inf->pause_sc == 0 && thread->pause_sc == 0) |
942fd805 MK |
1622 | /* If something actually happened to THREAD, make sure we |
1623 | suspend it. */ | |
c906108c SS |
1624 | { |
1625 | thread->sc = 1; | |
1626 | inf_update_suspends (inf); | |
c5aa993b | 1627 | } |
c906108c | 1628 | |
617fd3b5 PA |
1629 | inf_debug (inf, "returning ptid = %s, status = %s (%d)", |
1630 | target_pid_to_str (ptid), | |
c906108c SS |
1631 | status->kind == TARGET_WAITKIND_EXITED ? "EXITED" |
1632 | : status->kind == TARGET_WAITKIND_STOPPED ? "STOPPED" | |
1633 | : status->kind == TARGET_WAITKIND_SIGNALLED ? "SIGNALLED" | |
1634 | : status->kind == TARGET_WAITKIND_LOADED ? "LOADED" | |
1635 | : status->kind == TARGET_WAITKIND_SPURIOUS ? "SPURIOUS" | |
1636 | : "?", | |
1637 | status->value.integer); | |
1638 | ||
617fd3b5 | 1639 | return ptid; |
c906108c | 1640 | } |
942fd805 | 1641 | |
c906108c SS |
1642 | \f |
1643 | /* The rpc handler called by exc_server. */ | |
1644 | error_t | |
1645 | S_exception_raise_request (mach_port_t port, mach_port_t reply_port, | |
1646 | thread_t thread_port, task_t task_port, | |
1647 | int exception, int code, int subcode) | |
1648 | { | |
1649 | struct inf *inf = waiting_inf; | |
1650 | struct proc *thread = inf_port_to_thread (inf, thread_port); | |
1651 | ||
1652 | inf_debug (waiting_inf, | |
1653 | "thread = %d, task = %d, exc = %d, code = %d, subcode = %d", | |
942fd805 | 1654 | thread_port, task_port, exception, code, subcode); |
c906108c SS |
1655 | |
1656 | if (!thread) | |
1657 | /* We don't know about thread? */ | |
1658 | { | |
1659 | inf_update_procs (inf); | |
1660 | thread = inf_port_to_thread (inf, thread_port); | |
1661 | if (!thread) | |
1662 | /* Give up, the generating thread is gone. */ | |
1663 | return 0; | |
1664 | } | |
1665 | ||
1666 | mach_port_deallocate (mach_task_self (), thread_port); | |
1667 | mach_port_deallocate (mach_task_self (), task_port); | |
1668 | ||
c5aa993b | 1669 | if (!thread->aborted) |
c906108c SS |
1670 | /* THREAD hasn't been aborted since this exception happened (abortion |
1671 | clears any exception state), so it must be real. */ | |
1672 | { | |
1673 | /* Store away the details; this will destroy any previous info. */ | |
1674 | inf->wait.thread = thread; | |
1675 | ||
1676 | inf->wait.status.kind = TARGET_WAITKIND_STOPPED; | |
1677 | ||
1678 | if (exception == EXC_BREAKPOINT) | |
1679 | /* GDB likes to get SIGTRAP for breakpoints. */ | |
1680 | { | |
1681 | inf->wait.status.value.sig = TARGET_SIGNAL_TRAP; | |
1682 | mach_port_deallocate (mach_task_self (), reply_port); | |
1683 | } | |
1684 | else | |
1685 | /* Record the exception so that we can forward it later. */ | |
1686 | { | |
1687 | if (thread->exc_port == port) | |
1688 | { | |
8e1a459b | 1689 | inf_debug (waiting_inf, "Handler is thread exception port <%d>", |
c906108c SS |
1690 | thread->saved_exc_port); |
1691 | inf->wait.exc.handler = thread->saved_exc_port; | |
1692 | } | |
1693 | else | |
1694 | { | |
8e1a459b | 1695 | inf_debug (waiting_inf, "Handler is task exception port <%d>", |
c906108c SS |
1696 | inf->task->saved_exc_port); |
1697 | inf->wait.exc.handler = inf->task->saved_exc_port; | |
bf62e5b4 | 1698 | gdb_assert (inf->task->exc_port == port); |
c906108c SS |
1699 | } |
1700 | if (inf->wait.exc.handler != MACH_PORT_NULL) | |
1701 | /* Add a reference to the exception handler. */ | |
1702 | mach_port_mod_refs (mach_task_self (), | |
1703 | inf->wait.exc.handler, MACH_PORT_RIGHT_SEND, | |
1704 | 1); | |
1705 | ||
1706 | inf->wait.exc.exception = exception; | |
1707 | inf->wait.exc.code = code; | |
1708 | inf->wait.exc.subcode = subcode; | |
1709 | inf->wait.exc.reply = reply_port; | |
1710 | ||
1711 | /* Exceptions are encoded in the signal space by putting them after | |
1712 | _NSIG; this assumes they're positive (and not extremely large)! */ | |
1713 | inf->wait.status.value.sig = | |
1714 | target_signal_from_host (_NSIG + exception); | |
1715 | } | |
1716 | } | |
1717 | else | |
1718 | /* A supppressed exception, which ignore. */ | |
1719 | { | |
1720 | inf->wait.suppress = 1; | |
1721 | mach_port_deallocate (mach_task_self (), reply_port); | |
1722 | } | |
1723 | ||
1724 | return 0; | |
1725 | } | |
942fd805 | 1726 | |
c906108c SS |
1727 | \f |
1728 | /* Fill in INF's wait field after a task has died without giving us more | |
1729 | detailed information. */ | |
1730 | void | |
1731 | inf_task_died_status (struct inf *inf) | |
1732 | { | |
8a3fe4f8 | 1733 | warning (_("Pid %d died with unknown exit status, using SIGKILL."), inf->pid); |
c906108c SS |
1734 | inf->wait.status.kind = TARGET_WAITKIND_SIGNALLED; |
1735 | inf->wait.status.value.sig = TARGET_SIGNAL_KILL; | |
1736 | } | |
1737 | ||
1738 | /* Notify server routines. The only real one is dead name notification. */ | |
1739 | error_t | |
1740 | do_mach_notify_dead_name (mach_port_t notify, mach_port_t dead_port) | |
1741 | { | |
1742 | struct inf *inf = waiting_inf; | |
1743 | ||
1744 | inf_debug (waiting_inf, "port = %d", dead_port); | |
1745 | ||
1746 | if (inf->task && inf->task->port == dead_port) | |
1747 | { | |
1748 | proc_debug (inf->task, "is dead"); | |
1749 | inf->task->port = MACH_PORT_NULL; | |
1750 | if (proc_wait_pid == inf->pid) | |
1751 | /* We have a wait outstanding on the process, which will return more | |
1752 | detailed information, so delay until we get that. */ | |
1753 | inf->wait.suppress = 1; | |
1754 | else | |
1755 | /* We never waited for the process (maybe it wasn't a child), so just | |
1756 | pretend it got a SIGKILL. */ | |
1757 | inf_task_died_status (inf); | |
1758 | } | |
1759 | else | |
1760 | { | |
1761 | struct proc *thread = inf_port_to_thread (inf, dead_port); | |
1762 | if (thread) | |
1763 | { | |
1764 | proc_debug (thread, "is dead"); | |
1765 | thread->port = MACH_PORT_NULL; | |
1766 | } | |
f90b2b1d JK |
1767 | |
1768 | if (inf->task->dead) | |
1769 | /* Since the task is dead, its threads are dying with it. */ | |
1770 | inf->wait.suppress = 1; | |
c906108c SS |
1771 | } |
1772 | ||
1773 | mach_port_deallocate (mach_task_self (), dead_port); | |
c5aa993b | 1774 | inf->threads_up_to_date = 0; /* Just in case */ |
c906108c SS |
1775 | |
1776 | return 0; | |
1777 | } | |
942fd805 | 1778 | |
c906108c SS |
1779 | \f |
1780 | static error_t | |
1781 | ill_rpc (char *fun) | |
1782 | { | |
8a3fe4f8 | 1783 | warning (_("illegal rpc: %s"), fun); |
c906108c SS |
1784 | return 0; |
1785 | } | |
1786 | ||
1787 | error_t | |
1788 | do_mach_notify_no_senders (mach_port_t notify, mach_port_mscount_t count) | |
1789 | { | |
89396210 | 1790 | return ill_rpc ("do_mach_notify_no_senders"); |
c906108c SS |
1791 | } |
1792 | ||
1793 | error_t | |
1794 | do_mach_notify_port_deleted (mach_port_t notify, mach_port_t name) | |
1795 | { | |
89396210 | 1796 | return ill_rpc ("do_mach_notify_port_deleted"); |
c906108c SS |
1797 | } |
1798 | ||
1799 | error_t | |
1800 | do_mach_notify_msg_accepted (mach_port_t notify, mach_port_t name) | |
1801 | { | |
89396210 | 1802 | return ill_rpc ("do_mach_notify_msg_accepted"); |
c906108c SS |
1803 | } |
1804 | ||
1805 | error_t | |
1806 | do_mach_notify_port_destroyed (mach_port_t notify, mach_port_t name) | |
1807 | { | |
89396210 | 1808 | return ill_rpc ("do_mach_notify_port_destroyed"); |
c906108c SS |
1809 | } |
1810 | ||
1811 | error_t | |
1812 | do_mach_notify_send_once (mach_port_t notify) | |
1813 | { | |
89396210 | 1814 | return ill_rpc ("do_mach_notify_send_once"); |
c906108c | 1815 | } |
942fd805 | 1816 | |
c906108c SS |
1817 | \f |
1818 | /* Process_reply server routines. We only use process_wait_reply. */ | |
1819 | ||
1820 | error_t | |
1821 | S_proc_wait_reply (mach_port_t reply, error_t err, | |
1822 | int status, int sigcode, rusage_t rusage, pid_t pid) | |
1823 | { | |
1824 | struct inf *inf = waiting_inf; | |
1825 | ||
1826 | inf_debug (inf, "err = %s, pid = %d, status = 0x%x, sigcode = %d", | |
dc672865 | 1827 | err ? safe_strerror (err) : "0", pid, status, sigcode); |
c906108c SS |
1828 | |
1829 | if (err && proc_wait_pid && (!inf->task || !inf->task->port)) | |
1830 | /* Ack. The task has died, but the task-died notification code didn't | |
1831 | tell anyone because it thought a more detailed reply from the | |
1832 | procserver was forthcoming. However, we now learn that won't | |
1833 | happen... So we have to act like the task just died, and this time, | |
1834 | tell the world. */ | |
1835 | inf_task_died_status (inf); | |
1836 | ||
1837 | if (--proc_waits_pending == 0) | |
1838 | /* PROC_WAIT_PID represents the most recent wait. We will always get | |
1839 | replies in order because the proc server is single threaded. */ | |
1840 | proc_wait_pid = 0; | |
1841 | ||
1842 | inf_debug (inf, "waits pending now: %d", proc_waits_pending); | |
1843 | ||
1844 | if (err) | |
1845 | { | |
1846 | if (err != EINTR) | |
1847 | { | |
8a3fe4f8 | 1848 | warning (_("Can't wait for pid %d: %s"), inf->pid, safe_strerror (err)); |
c906108c SS |
1849 | inf->no_wait = 1; |
1850 | ||
1851 | /* Since we can't see the inferior's signals, don't trap them. */ | |
1852 | inf_set_traced (inf, 0); | |
1853 | } | |
1854 | } | |
1855 | else if (pid == inf->pid) | |
1856 | { | |
1857 | store_waitstatus (&inf->wait.status, status); | |
1858 | if (inf->wait.status.kind == TARGET_WAITKIND_STOPPED) | |
1859 | /* The process has sent us a signal, and stopped itself in a sane | |
1860 | state pending our actions. */ | |
1861 | { | |
1862 | inf_debug (inf, "process has stopped itself"); | |
1863 | inf->stopped = 1; | |
1864 | } | |
1865 | } | |
1866 | else | |
1867 | inf->wait.suppress = 1; /* Something odd happened. Ignore. */ | |
1868 | ||
1869 | return 0; | |
1870 | } | |
1871 | ||
1872 | error_t | |
1873 | S_proc_setmsgport_reply (mach_port_t reply, error_t err, | |
1874 | mach_port_t old_msg_port) | |
1875 | { | |
89396210 | 1876 | return ill_rpc ("S_proc_setmsgport_reply"); |
c906108c SS |
1877 | } |
1878 | ||
1879 | error_t | |
1880 | S_proc_getmsgport_reply (mach_port_t reply, error_t err, mach_port_t msg_port) | |
1881 | { | |
89396210 | 1882 | return ill_rpc ("S_proc_getmsgport_reply"); |
c906108c | 1883 | } |
942fd805 | 1884 | |
c906108c SS |
1885 | \f |
1886 | /* Msg_reply server routines. We only use msg_sig_post_untraced_reply. */ | |
1887 | ||
1888 | error_t | |
1889 | S_msg_sig_post_untraced_reply (mach_port_t reply, error_t err) | |
1890 | { | |
1891 | struct inf *inf = waiting_inf; | |
1892 | ||
1893 | if (err == EBUSY) | |
1894 | /* EBUSY is what we get when the crash server has grabbed control of the | |
1895 | process and doesn't like what signal we tried to send it. Just act | |
1896 | like the process stopped (using a signal of 0 should mean that the | |
1897 | *next* time the user continues, it will pass signal 0, which the crash | |
1898 | server should like). */ | |
1899 | { | |
1900 | inf->wait.status.kind = TARGET_WAITKIND_STOPPED; | |
1901 | inf->wait.status.value.sig = TARGET_SIGNAL_0; | |
1902 | } | |
1903 | else if (err) | |
8a3fe4f8 | 1904 | warning (_("Signal delivery failed: %s"), safe_strerror (err)); |
c906108c SS |
1905 | |
1906 | if (err) | |
1907 | /* We only get this reply when we've posted a signal to a process which we | |
1908 | thought was stopped, and which we expected to continue after the signal. | |
1909 | Given that the signal has failed for some reason, it's reasonable to | |
1910 | assume it's still stopped. */ | |
1911 | inf->stopped = 1; | |
1912 | else | |
1913 | inf->wait.suppress = 1; | |
1914 | ||
1915 | return 0; | |
1916 | } | |
1917 | ||
1918 | error_t | |
1919 | S_msg_sig_post_reply (mach_port_t reply, error_t err) | |
1920 | { | |
89396210 | 1921 | return ill_rpc ("S_msg_sig_post_reply"); |
c906108c | 1922 | } |
942fd805 | 1923 | |
c906108c SS |
1924 | \f |
1925 | /* Returns the number of messages queued for the receive right PORT. */ | |
1926 | static mach_port_msgcount_t | |
1927 | port_msgs_queued (mach_port_t port) | |
1928 | { | |
1929 | struct mach_port_status status; | |
1930 | error_t err = | |
c5aa993b | 1931 | mach_port_get_receive_status (mach_task_self (), port, &status); |
c906108c SS |
1932 | |
1933 | if (err) | |
1934 | return 0; | |
1935 | else | |
1936 | return status.mps_msgcount; | |
1937 | } | |
942fd805 | 1938 | |
c906108c SS |
1939 | \f |
1940 | /* Resume execution of the inferior process. | |
1941 | ||
1942 | If STEP is nonzero, single-step it. | |
1943 | If SIGNAL is nonzero, give it that signal. | |
1944 | ||
1945 | TID STEP: | |
1946 | -1 true Single step the current thread allowing other threads to run. | |
1947 | -1 false Continue the current thread allowing other threads to run. | |
1948 | X true Single step the given thread, don't allow any others to run. | |
1949 | X false Continue the given thread, do not allow any others to run. | |
1950 | (Where X, of course, is anything except -1) | |
1951 | ||
1952 | Note that a resume may not `take' if there are pending exceptions/&c | |
1953 | still unprocessed from the last resume we did (any given resume may result | |
1954 | in multiple events returned by wait). | |
c5aa993b | 1955 | */ |
c906108c | 1956 | static void |
617fd3b5 | 1957 | gnu_resume (ptid_t ptid, int step, enum target_signal sig) |
c906108c SS |
1958 | { |
1959 | struct proc *step_thread = 0; | |
617fd3b5 | 1960 | int resume_all; |
c289427b | 1961 | struct inf *inf = gnu_current_inf; |
c906108c | 1962 | |
617fd3b5 PA |
1963 | inf_debug (inf, "ptid = %s, step = %d, sig = %d", |
1964 | target_pid_to_str (ptid), step, sig); | |
c906108c | 1965 | |
cce74817 | 1966 | inf_validate_procinfo (inf); |
c5aa993b | 1967 | |
c906108c | 1968 | if (sig != TARGET_SIGNAL_0 || inf->stopped) |
cce74817 JM |
1969 | { |
1970 | if (sig == TARGET_SIGNAL_0 && inf->nomsg) | |
1971 | inf_continue (inf); | |
1972 | else | |
1973 | inf_signal (inf, sig); | |
1974 | } | |
c906108c SS |
1975 | else if (inf->wait.exc.reply != MACH_PORT_NULL) |
1976 | /* We received an exception to which we have chosen not to forward, so | |
1977 | abort the faulting thread, which will perhaps retake it. */ | |
1978 | { | |
1979 | proc_abort (inf->wait.thread, 1); | |
8a3fe4f8 | 1980 | warning (_("Aborting %s with unforwarded exception %s."), |
c906108c SS |
1981 | proc_string (inf->wait.thread), |
1982 | target_signal_to_name (inf->wait.status.value.sig)); | |
1983 | } | |
1984 | ||
1985 | if (port_msgs_queued (inf->event_port)) | |
1986 | /* If there are still messages in our event queue, don't bother resuming | |
1987 | the process, as we're just going to stop it right away anyway. */ | |
1988 | return; | |
1989 | ||
1990 | inf_update_procs (inf); | |
1991 | ||
617fd3b5 PA |
1992 | /* A specific PTID means `step only this process id'. */ |
1993 | resume_all = ptid_equal (ptid, minus_one_ptid); | |
1994 | ||
1995 | if (resume_all) | |
c906108c SS |
1996 | /* Allow all threads to run, except perhaps single-stepping one. */ |
1997 | { | |
39f77062 | 1998 | inf_debug (inf, "running all threads; tid = %d", PIDGET (inferior_ptid)); |
617fd3b5 | 1999 | ptid = inferior_ptid; /* What to step. */ |
c906108c SS |
2000 | inf_set_threads_resume_sc (inf, 0, 1); |
2001 | } | |
2002 | else | |
2003 | /* Just allow a single thread to run. */ | |
2004 | { | |
617fd3b5 | 2005 | struct proc *thread = inf_tid_to_thread (inf, ptid_get_tid (ptid)); |
c5aa993b | 2006 | if (!thread) |
617fd3b5 PA |
2007 | error (_("Can't run single thread id %s: no such thread!"), |
2008 | target_pid_to_str (ptid)); | |
2009 | inf_debug (inf, "running one thread: %s", target_pid_to_str (ptid)); | |
c906108c SS |
2010 | inf_set_threads_resume_sc (inf, thread, 0); |
2011 | } | |
2012 | ||
2013 | if (step) | |
2014 | { | |
617fd3b5 | 2015 | step_thread = inf_tid_to_thread (inf, ptid_get_tid (ptid)); |
c5aa993b | 2016 | if (!step_thread) |
617fd3b5 PA |
2017 | warning (_("Can't step thread id %s: no such thread."), |
2018 | target_pid_to_str (ptid)); | |
c906108c | 2019 | else |
617fd3b5 | 2020 | inf_debug (inf, "stepping thread: %s", target_pid_to_str (ptid)); |
c906108c SS |
2021 | } |
2022 | if (step_thread != inf->step_thread) | |
2023 | inf_set_step_thread (inf, step_thread); | |
2024 | ||
2025 | inf_debug (inf, "here we go..."); | |
2026 | inf_resume (inf); | |
2027 | } | |
942fd805 | 2028 | |
c906108c SS |
2029 | \f |
2030 | static void | |
fba45db2 | 2031 | gnu_kill_inferior (void) |
c906108c | 2032 | { |
c289427b | 2033 | struct proc *task = gnu_current_inf->task; |
c906108c SS |
2034 | if (task) |
2035 | { | |
2036 | proc_debug (task, "terminating..."); | |
2037 | task_terminate (task->port); | |
c289427b | 2038 | inf_set_pid (gnu_current_inf, -1); |
c906108c SS |
2039 | } |
2040 | target_mourn_inferior (); | |
2041 | } | |
2042 | ||
2043 | /* Clean up after the inferior dies. */ | |
c906108c | 2044 | static void |
136d6dae | 2045 | gnu_mourn_inferior (struct target_ops *ops) |
c906108c | 2046 | { |
c289427b PA |
2047 | inf_debug (gnu_current_inf, "rip"); |
2048 | inf_detach (gnu_current_inf); | |
c906108c SS |
2049 | unpush_target (&gnu_ops); |
2050 | generic_mourn_inferior (); | |
2051 | } | |
942fd805 | 2052 | |
c906108c SS |
2053 | \f |
2054 | /* Fork an inferior process, and start debugging it. */ | |
2055 | ||
2056 | /* Set INFERIOR_PID to the first thread available in the child, if any. */ | |
2057 | static int | |
fba45db2 | 2058 | inf_pick_first_thread (void) |
c906108c | 2059 | { |
c289427b | 2060 | if (gnu_current_inf->task && gnu_current_inf->threads) |
c906108c | 2061 | /* The first thread. */ |
c289427b | 2062 | return gnu_current_inf->threads->tid; |
c906108c SS |
2063 | else |
2064 | /* What may be the next thread. */ | |
2065 | return next_thread_id; | |
2066 | } | |
2067 | ||
2068 | static struct inf * | |
fba45db2 | 2069 | cur_inf (void) |
c906108c | 2070 | { |
c289427b PA |
2071 | if (!gnu_current_inf) |
2072 | gnu_current_inf = make_inf (); | |
2073 | return gnu_current_inf; | |
c906108c SS |
2074 | } |
2075 | ||
2076 | static void | |
136d6dae VP |
2077 | gnu_create_inferior (struct target_ops *ops, |
2078 | char *exec_file, char *allargs, char **env, | |
c27cda74 | 2079 | int from_tty) |
c906108c SS |
2080 | { |
2081 | struct inf *inf = cur_inf (); | |
2082 | ||
2083 | void trace_me () | |
c5aa993b JM |
2084 | { |
2085 | /* We're in the child; make this process stop as soon as it execs. */ | |
2086 | inf_debug (inf, "tracing self"); | |
2087 | if (ptrace (PTRACE_TRACEME) != 0) | |
8a3fe4f8 | 2088 | error (_("ptrace (PTRACE_TRACEME) failed!")); |
c5aa993b | 2089 | } |
7a292a7a | 2090 | void attach_to_child (int pid) |
c5aa993b JM |
2091 | { |
2092 | /* Attach to the now stopped child, which is actually a shell... */ | |
2093 | inf_debug (inf, "attaching to child: %d", pid); | |
c906108c | 2094 | |
c5aa993b | 2095 | inf_attach (inf, pid); |
c906108c | 2096 | |
c5aa993b | 2097 | push_target (&gnu_ops); |
c906108c | 2098 | |
c5aa993b JM |
2099 | inf->pending_execs = 2; |
2100 | inf->nomsg = 1; | |
2101 | inf->traced = 1; | |
c906108c | 2102 | |
c5aa993b JM |
2103 | /* Now let the child run again, knowing that it will stop immediately |
2104 | because of the ptrace. */ | |
2105 | inf_resume (inf); | |
617fd3b5 PA |
2106 | |
2107 | /* We now have thread info. */ | |
2108 | thread_change_ptid (inferior_ptid, | |
2109 | ptid_build (inf->pid, 0, inf_pick_first_thread ())); | |
c906108c | 2110 | |
c5aa993b JM |
2111 | startup_inferior (inf->pending_execs); |
2112 | } | |
c906108c SS |
2113 | |
2114 | inf_debug (inf, "creating inferior"); | |
2115 | ||
7a292a7a SS |
2116 | fork_inferior (exec_file, allargs, env, trace_me, attach_to_child, |
2117 | NULL, NULL); | |
c906108c | 2118 | |
cce74817 | 2119 | inf_validate_procinfo (inf); |
c906108c SS |
2120 | inf_update_signal_thread (inf); |
2121 | inf_set_traced (inf, inf->want_signals); | |
2122 | ||
2123 | /* Execing the process will have trashed our exception ports; steal them | |
2124 | back (or make sure they're restored if the user wants that). */ | |
2125 | if (inf->want_exceptions) | |
2126 | inf_steal_exc_ports (inf); | |
2127 | else | |
2128 | inf_restore_exc_ports (inf); | |
c906108c SS |
2129 | } |
2130 | ||
2131 | /* Mark our target-struct as eligible for stray "run" and "attach" | |
2132 | commands. */ | |
2133 | static int | |
fba45db2 | 2134 | gnu_can_run (void) |
c906108c SS |
2135 | { |
2136 | return 1; | |
2137 | } | |
942fd805 | 2138 | |
c906108c | 2139 | \f |
c906108c SS |
2140 | /* Attach to process PID, then initialize for debugging it |
2141 | and wait for the trace-trap that results from attaching. */ | |
2142 | static void | |
136d6dae | 2143 | gnu_attach (struct target_ops *ops, char *args, int from_tty) |
c906108c SS |
2144 | { |
2145 | int pid; | |
2146 | char *exec_file; | |
2147 | struct inf *inf = cur_inf (); | |
181e7f93 | 2148 | struct inferior *inferior; |
c906108c SS |
2149 | |
2150 | if (!args) | |
e2e0b3e5 | 2151 | error_no_arg (_("process-id to attach")); |
c906108c SS |
2152 | |
2153 | pid = atoi (args); | |
2154 | ||
c5aa993b | 2155 | if (pid == getpid ()) /* Trying to masturbate? */ |
8a3fe4f8 | 2156 | error (_("I refuse to debug myself!")); |
c906108c SS |
2157 | |
2158 | if (from_tty) | |
2159 | { | |
2160 | exec_file = (char *) get_exec_file (0); | |
2161 | ||
2162 | if (exec_file) | |
2163 | printf_unfiltered ("Attaching to program `%s', pid %d\n", | |
2164 | exec_file, pid); | |
2165 | else | |
2166 | printf_unfiltered ("Attaching to pid %d\n", pid); | |
2167 | ||
2168 | gdb_flush (gdb_stdout); | |
2169 | } | |
2170 | ||
2171 | inf_debug (inf, "attaching to pid: %d", pid); | |
2172 | ||
2173 | inf_attach (inf, pid); | |
a9ab7422 PA |
2174 | |
2175 | push_target (&gnu_ops); | |
2176 | ||
181e7f93 PA |
2177 | inferior = add_inferior (pid); |
2178 | inferior->attach_flag = 1; | |
7f9f62ba | 2179 | |
c906108c SS |
2180 | inf_update_procs (inf); |
2181 | ||
617fd3b5 | 2182 | inferior_ptid = ptid_build (pid, 0, inf_pick_first_thread ()); |
c906108c | 2183 | |
b83266a0 SS |
2184 | /* We have to initialize the terminal settings now, since the code |
2185 | below might try to restore them. */ | |
2186 | target_terminal_init (); | |
c5aa993b | 2187 | |
c906108c SS |
2188 | /* If the process was stopped before we attached, make it continue the next |
2189 | time the user does a continue. */ | |
cce74817 JM |
2190 | inf_validate_procinfo (inf); |
2191 | ||
2192 | inf_update_signal_thread (inf); | |
2193 | inf_set_traced (inf, inf->want_signals); | |
c906108c | 2194 | |
c5aa993b | 2195 | #if 0 /* Do we need this? */ |
c906108c SS |
2196 | renumber_threads (0); /* Give our threads reasonable names. */ |
2197 | #endif | |
2198 | } | |
942fd805 | 2199 | |
c906108c SS |
2200 | \f |
2201 | /* Take a program previously attached to and detaches it. | |
2202 | The program resumes execution and will no longer stop | |
2203 | on signals, etc. We'd better not have left any breakpoints | |
2204 | in the program or it'll die when it hits one. For this | |
2205 | to work, it may be necessary for the process to have been | |
2206 | previously attached. It *might* work if the program was | |
2207 | started via fork. */ | |
2208 | static void | |
136d6dae | 2209 | gnu_detach (struct target_ops *ops, char *args, int from_tty) |
c906108c | 2210 | { |
7f9f62ba PA |
2211 | int pid; |
2212 | ||
c906108c SS |
2213 | if (from_tty) |
2214 | { | |
2215 | char *exec_file = get_exec_file (0); | |
2216 | if (exec_file) | |
2217 | printf_unfiltered ("Detaching from program `%s' pid %d\n", | |
c289427b | 2218 | exec_file, gnu_current_inf->pid); |
c906108c | 2219 | else |
c289427b | 2220 | printf_unfiltered ("Detaching from pid %d\n", gnu_current_inf->pid); |
c906108c SS |
2221 | gdb_flush (gdb_stdout); |
2222 | } | |
c5aa993b | 2223 | |
c289427b | 2224 | pid = gnu_current_inf->pid; |
7f9f62ba | 2225 | |
c289427b | 2226 | inf_detach (gnu_current_inf); |
c906108c | 2227 | |
39f77062 | 2228 | inferior_ptid = null_ptid; |
7f9f62ba | 2229 | detach_inferior (pid); |
c906108c | 2230 | |
c5aa993b | 2231 | unpush_target (&gnu_ops); /* Pop out of handling an inferior */ |
c906108c | 2232 | } |
942fd805 | 2233 | \f |
c906108c | 2234 | static void |
fba45db2 | 2235 | gnu_terminal_init_inferior (void) |
c906108c | 2236 | { |
c289427b PA |
2237 | gdb_assert (gnu_current_inf); |
2238 | terminal_init_inferior_with_pgrp (gnu_current_inf->pid); | |
c906108c SS |
2239 | } |
2240 | ||
2241 | /* Get ready to modify the registers array. On machines which store | |
2242 | individual registers, this doesn't need to do anything. On machines | |
2243 | which store all the registers in one fell swoop, this makes sure | |
2244 | that registers contains all the registers from the program being | |
2245 | debugged. */ | |
c906108c | 2246 | static void |
316f2060 | 2247 | gnu_prepare_to_store (struct regcache *regcache) |
c906108c | 2248 | { |
c906108c SS |
2249 | } |
2250 | ||
2251 | static void | |
fba45db2 | 2252 | gnu_open (char *arg, int from_tty) |
c906108c | 2253 | { |
8a3fe4f8 | 2254 | error (_("Use the \"run\" command to start a Unix child process.")); |
c906108c SS |
2255 | } |
2256 | ||
2257 | static void | |
f9c72d52 | 2258 | gnu_stop (ptid_t ptid) |
c906108c | 2259 | { |
8a3fe4f8 | 2260 | error (_("to_stop target function not implemented")); |
c906108c SS |
2261 | } |
2262 | ||
c906108c | 2263 | static int |
617fd3b5 | 2264 | gnu_thread_alive (ptid_t ptid) |
c906108c | 2265 | { |
c289427b PA |
2266 | inf_update_procs (gnu_current_inf); |
2267 | return !!inf_tid_to_thread (gnu_current_inf, | |
617fd3b5 | 2268 | ptid_get_tid (ptid)); |
c906108c | 2269 | } |
942fd805 | 2270 | |
c906108c | 2271 | \f |
942fd805 MK |
2272 | /* Read inferior task's LEN bytes from ADDR and copy it to MYADDR in |
2273 | gdb's address space. Return 0 on failure; number of bytes read | |
2274 | otherwise. */ | |
c906108c | 2275 | int |
fba45db2 | 2276 | gnu_read_inferior (task_t task, CORE_ADDR addr, char *myaddr, int length) |
c906108c SS |
2277 | { |
2278 | error_t err; | |
2279 | vm_address_t low_address = (vm_address_t) trunc_page (addr); | |
2280 | vm_size_t aligned_length = | |
c5aa993b JM |
2281 | (vm_size_t) round_page (addr + length) - low_address; |
2282 | pointer_t copied; | |
2283 | int copy_count; | |
c906108c SS |
2284 | |
2285 | /* Get memory from inferior with page aligned addresses */ | |
2286 | err = vm_read (task, low_address, aligned_length, &copied, ©_count); | |
2287 | if (err) | |
2288 | return 0; | |
2289 | ||
96ffcb62 | 2290 | err = hurd_safe_copyin (myaddr, (void *) (addr - low_address + copied), length); |
c906108c SS |
2291 | if (err) |
2292 | { | |
8a3fe4f8 | 2293 | warning (_("Read from inferior faulted: %s"), safe_strerror (err)); |
c906108c SS |
2294 | length = 0; |
2295 | } | |
2296 | ||
2297 | err = vm_deallocate (mach_task_self (), copied, copy_count); | |
2298 | if (err) | |
8a3fe4f8 | 2299 | warning (_("gnu_read_inferior vm_deallocate failed: %s"), safe_strerror (err)); |
c906108c SS |
2300 | |
2301 | return length; | |
2302 | } | |
2303 | ||
2304 | #define CHK_GOTO_OUT(str,ret) \ | |
2305 | do if (ret != KERN_SUCCESS) { errstr = #str; goto out; } while(0) | |
2306 | ||
c5aa993b JM |
2307 | struct vm_region_list |
2308 | { | |
c906108c | 2309 | struct vm_region_list *next; |
c5aa993b JM |
2310 | vm_prot_t protection; |
2311 | vm_address_t start; | |
2312 | vm_size_t length; | |
c906108c SS |
2313 | }; |
2314 | ||
c5aa993b | 2315 | struct obstack region_obstack; |
c906108c | 2316 | |
942fd805 MK |
2317 | /* Write gdb's LEN bytes from MYADDR and copy it to ADDR in inferior |
2318 | task's address space. */ | |
c906108c | 2319 | int |
fba45db2 | 2320 | gnu_write_inferior (task_t task, CORE_ADDR addr, char *myaddr, int length) |
c906108c SS |
2321 | { |
2322 | error_t err = 0; | |
c5aa993b JM |
2323 | vm_address_t low_address = (vm_address_t) trunc_page (addr); |
2324 | vm_size_t aligned_length = | |
2325 | (vm_size_t) round_page (addr + length) - low_address; | |
2326 | pointer_t copied; | |
2327 | int copy_count; | |
2328 | int deallocate = 0; | |
c906108c | 2329 | |
c5aa993b | 2330 | char *errstr = "Bug in gnu_write_inferior"; |
c906108c SS |
2331 | |
2332 | struct vm_region_list *region_element; | |
c5aa993b | 2333 | struct vm_region_list *region_head = (struct vm_region_list *) NULL; |
c906108c SS |
2334 | |
2335 | /* Get memory from inferior with page aligned addresses */ | |
2336 | err = vm_read (task, | |
2337 | low_address, | |
2338 | aligned_length, | |
2339 | &copied, | |
2340 | ©_count); | |
2341 | CHK_GOTO_OUT ("gnu_write_inferior vm_read failed", err); | |
2342 | ||
2343 | deallocate++; | |
2344 | ||
96ffcb62 | 2345 | err = hurd_safe_copyout ((void *) (addr - low_address + copied), |
942fd805 | 2346 | myaddr, length); |
c906108c SS |
2347 | CHK_GOTO_OUT ("Write to inferior faulted", err); |
2348 | ||
2349 | obstack_init (®ion_obstack); | |
2350 | ||
2351 | /* Do writes atomically. | |
942fd805 | 2352 | First check for holes and unwritable memory. */ |
c906108c | 2353 | { |
c5aa993b JM |
2354 | vm_size_t remaining_length = aligned_length; |
2355 | vm_address_t region_address = low_address; | |
c906108c SS |
2356 | |
2357 | struct vm_region_list *scan; | |
2358 | ||
c5aa993b | 2359 | while (region_address < low_address + aligned_length) |
c906108c SS |
2360 | { |
2361 | vm_prot_t protection; | |
2362 | vm_prot_t max_protection; | |
2363 | vm_inherit_t inheritance; | |
2364 | boolean_t shared; | |
2365 | mach_port_t object_name; | |
2366 | vm_offset_t offset; | |
c5aa993b JM |
2367 | vm_size_t region_length = remaining_length; |
2368 | vm_address_t old_address = region_address; | |
2369 | ||
c906108c SS |
2370 | err = vm_region (task, |
2371 | ®ion_address, | |
2372 | ®ion_length, | |
2373 | &protection, | |
2374 | &max_protection, | |
2375 | &inheritance, | |
2376 | &shared, | |
2377 | &object_name, | |
2378 | &offset); | |
2379 | CHK_GOTO_OUT ("vm_region failed", err); | |
2380 | ||
2381 | /* Check for holes in memory */ | |
2382 | if (old_address != region_address) | |
2383 | { | |
8a3fe4f8 | 2384 | warning (_("No memory at 0x%x. Nothing written"), |
c906108c SS |
2385 | old_address); |
2386 | err = KERN_SUCCESS; | |
2387 | length = 0; | |
2388 | goto out; | |
2389 | } | |
2390 | ||
2391 | if (!(max_protection & VM_PROT_WRITE)) | |
2392 | { | |
8a3fe4f8 | 2393 | warning (_("Memory at address 0x%x is unwritable. Nothing written"), |
c906108c SS |
2394 | old_address); |
2395 | err = KERN_SUCCESS; | |
2396 | length = 0; | |
2397 | goto out; | |
2398 | } | |
2399 | ||
2400 | /* Chain the regions for later use */ | |
c5aa993b | 2401 | region_element = |
c906108c | 2402 | (struct vm_region_list *) |
c5aa993b JM |
2403 | obstack_alloc (®ion_obstack, sizeof (struct vm_region_list)); |
2404 | ||
c906108c | 2405 | region_element->protection = protection; |
c5aa993b JM |
2406 | region_element->start = region_address; |
2407 | region_element->length = region_length; | |
c906108c SS |
2408 | |
2409 | /* Chain the regions along with protections */ | |
2410 | region_element->next = region_head; | |
c5aa993b JM |
2411 | region_head = region_element; |
2412 | ||
c906108c SS |
2413 | region_address += region_length; |
2414 | remaining_length = remaining_length - region_length; | |
2415 | } | |
2416 | ||
2417 | /* If things fail after this, we give up. | |
942fd805 | 2418 | Somebody is messing up inferior_task's mappings. */ |
c5aa993b | 2419 | |
c906108c SS |
2420 | /* Enable writes to the chained vm regions */ |
2421 | for (scan = region_head; scan; scan = scan->next) | |
2422 | { | |
c906108c SS |
2423 | if (!(scan->protection & VM_PROT_WRITE)) |
2424 | { | |
2425 | err = vm_protect (task, | |
2426 | scan->start, | |
2427 | scan->length, | |
2428 | FALSE, | |
2429 | scan->protection | VM_PROT_WRITE); | |
2430 | CHK_GOTO_OUT ("vm_protect: enable write failed", err); | |
2431 | } | |
2432 | } | |
2433 | ||
2434 | err = vm_write (task, | |
2435 | low_address, | |
2436 | copied, | |
2437 | aligned_length); | |
2438 | CHK_GOTO_OUT ("vm_write failed", err); | |
c5aa993b | 2439 | |
c906108c SS |
2440 | /* Set up the original region protections, if they were changed */ |
2441 | for (scan = region_head; scan; scan = scan->next) | |
2442 | { | |
c906108c SS |
2443 | if (!(scan->protection & VM_PROT_WRITE)) |
2444 | { | |
2445 | err = vm_protect (task, | |
2446 | scan->start, | |
2447 | scan->length, | |
2448 | FALSE, | |
2449 | scan->protection); | |
2450 | CHK_GOTO_OUT ("vm_protect: enable write failed", err); | |
2451 | } | |
2452 | } | |
2453 | } | |
2454 | ||
c5aa993b | 2455 | out: |
c906108c SS |
2456 | if (deallocate) |
2457 | { | |
2458 | obstack_free (®ion_obstack, 0); | |
c5aa993b | 2459 | |
c906108c SS |
2460 | (void) vm_deallocate (mach_task_self (), |
2461 | copied, | |
2462 | copy_count); | |
2463 | } | |
2464 | ||
2465 | if (err != KERN_SUCCESS) | |
2466 | { | |
8a3fe4f8 | 2467 | warning (_("%s: %s"), errstr, mach_error_string (err)); |
c906108c SS |
2468 | return 0; |
2469 | } | |
2470 | ||
2471 | return length; | |
2472 | } | |
942fd805 | 2473 | |
c906108c | 2474 | \f |
0359ddd6 KB |
2475 | /* Return 0 on failure, number of bytes handled otherwise. TARGET |
2476 | is ignored. */ | |
c906108c | 2477 | static int |
96ffcb62 | 2478 | gnu_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write, |
043780a1 | 2479 | struct mem_attrib *attrib, |
0359ddd6 | 2480 | struct target_ops *target) |
c906108c | 2481 | { |
c289427b PA |
2482 | task_t task = (gnu_current_inf |
2483 | ? (gnu_current_inf->task | |
2484 | ? gnu_current_inf->task->port : 0) | |
942fd805 | 2485 | : 0); |
c906108c SS |
2486 | |
2487 | if (task == MACH_PORT_NULL) | |
2488 | return 0; | |
2489 | else | |
2490 | { | |
c289427b | 2491 | inf_debug (gnu_current_inf, "%s %p[%d] %s %p", |
57e76fac | 2492 | write ? "writing" : "reading", (void *) memaddr, len, |
c906108c SS |
2493 | write ? "<--" : "-->", myaddr); |
2494 | if (write) | |
2495 | return gnu_write_inferior (task, memaddr, myaddr, len); | |
2496 | else | |
c5aa993b | 2497 | return gnu_read_inferior (task, memaddr, myaddr, len); |
c906108c SS |
2498 | } |
2499 | } | |
942fd805 | 2500 | |
57e76fac MS |
2501 | /* Call FUNC on each memory region in the task. */ |
2502 | static int | |
2503 | gnu_find_memory_regions (int (*func) (CORE_ADDR, | |
2504 | unsigned long, | |
2505 | int, int, int, | |
2506 | void *), | |
2507 | void *data) | |
2508 | { | |
2509 | error_t err; | |
2510 | task_t task; | |
2511 | vm_address_t region_address, last_region_address, last_region_end; | |
2512 | vm_prot_t last_protection; | |
2513 | ||
c289427b | 2514 | if (gnu_current_inf == 0 || gnu_current_inf->task == 0) |
57e76fac | 2515 | return 0; |
c289427b | 2516 | task = gnu_current_inf->task->port; |
57e76fac MS |
2517 | if (task == MACH_PORT_NULL) |
2518 | return 0; | |
2519 | ||
2520 | region_address = last_region_address = last_region_end = VM_MIN_ADDRESS; | |
2521 | last_protection = VM_PROT_NONE; | |
2522 | while (region_address < VM_MAX_ADDRESS) | |
2523 | { | |
2524 | vm_prot_t protection; | |
2525 | vm_prot_t max_protection; | |
2526 | vm_inherit_t inheritance; | |
2527 | boolean_t shared; | |
2528 | mach_port_t object_name; | |
2529 | vm_offset_t offset; | |
2530 | vm_size_t region_length = VM_MAX_ADDRESS - region_address; | |
2531 | vm_address_t old_address = region_address; | |
2532 | ||
2533 | err = vm_region (task, | |
2534 | ®ion_address, | |
2535 | ®ion_length, | |
2536 | &protection, | |
2537 | &max_protection, | |
2538 | &inheritance, | |
2539 | &shared, | |
2540 | &object_name, | |
2541 | &offset); | |
2542 | if (err == KERN_NO_SPACE) | |
2543 | break; | |
2544 | if (err != KERN_SUCCESS) | |
2545 | { | |
8a3fe4f8 | 2546 | warning (_("vm_region failed: %s"), mach_error_string (err)); |
57e76fac MS |
2547 | return -1; |
2548 | } | |
2549 | ||
2550 | if (protection == last_protection && region_address == last_region_end) | |
2551 | /* This region is contiguous with and indistinguishable from | |
2552 | the previous one, so we just extend that one. */ | |
2553 | last_region_end = region_address += region_length; | |
2554 | else | |
2555 | { | |
2556 | /* This region is distinct from the last one we saw, so report | |
2557 | that previous one. */ | |
2558 | if (last_protection != VM_PROT_NONE) | |
2559 | (*func) (last_region_address, | |
2560 | last_region_end - last_region_address, | |
2561 | last_protection & VM_PROT_READ, | |
2562 | last_protection & VM_PROT_WRITE, | |
2563 | last_protection & VM_PROT_EXECUTE, | |
2564 | data); | |
2565 | last_region_address = region_address; | |
2566 | last_region_end = region_address += region_length; | |
2567 | last_protection = protection; | |
2568 | } | |
2569 | } | |
47f21bcc | 2570 | |
1a113c93 MS |
2571 | /* Report the final region. */ |
2572 | if (last_region_end > last_region_address && last_protection != VM_PROT_NONE) | |
2573 | (*func) (last_region_address, last_region_end - last_region_address, | |
2574 | last_protection & VM_PROT_READ, | |
2575 | last_protection & VM_PROT_WRITE, | |
2576 | last_protection & VM_PROT_EXECUTE, | |
2577 | data); | |
47f21bcc MS |
2578 | |
2579 | return 0; | |
57e76fac MS |
2580 | } |
2581 | ||
c906108c | 2582 | \f |
ed9a39eb | 2583 | /* Return printable description of proc. */ |
f90b2b1d | 2584 | char * |
ed9a39eb JM |
2585 | proc_string (struct proc *proc) |
2586 | { | |
2587 | static char tid_str[80]; | |
2588 | if (proc_is_task (proc)) | |
2589 | sprintf (tid_str, "process %d", proc->inf->pid); | |
2590 | else | |
114374a0 | 2591 | sprintf (tid_str, "Thread %d.%d", |
617fd3b5 | 2592 | proc->inf->pid, proc->tid); |
ed9a39eb JM |
2593 | return tid_str; |
2594 | } | |
2595 | ||
2596 | static char * | |
39f77062 | 2597 | gnu_pid_to_str (ptid_t ptid) |
ed9a39eb | 2598 | { |
c289427b | 2599 | struct inf *inf = gnu_current_inf; |
617fd3b5 | 2600 | int tid = ptid_get_tid (ptid); |
ed9a39eb JM |
2601 | struct proc *thread = inf_tid_to_thread (inf, tid); |
2602 | ||
2603 | if (thread) | |
2604 | return proc_string (thread); | |
2605 | else | |
2606 | { | |
2607 | static char tid_str[80]; | |
2608 | sprintf (tid_str, "bogus thread id %d", tid); | |
2609 | return tid_str; | |
2610 | } | |
2611 | } | |
942fd805 | 2612 | |
ed9a39eb | 2613 | \f |
56be3814 UW |
2614 | extern void gnu_store_registers (struct regcache *regcache, int regno); |
2615 | extern void gnu_fetch_registers (struct regcache *regcache, int regno); | |
c906108c | 2616 | |
c5aa993b | 2617 | struct target_ops gnu_ops; |
c906108c SS |
2618 | |
2619 | static void | |
c5aa993b JM |
2620 | init_gnu_ops (void) |
2621 | { | |
942fd805 MK |
2622 | gnu_ops.to_shortname = "GNU"; /* to_shortname */ |
2623 | gnu_ops.to_longname = "GNU Hurd process"; /* to_longname */ | |
c5aa993b | 2624 | gnu_ops.to_doc = "GNU Hurd process"; /* to_doc */ |
942fd805 | 2625 | gnu_ops.to_open = gnu_open; /* to_open */ |
c5aa993b | 2626 | gnu_ops.to_attach = gnu_attach; /* to_attach */ |
dc177b7a | 2627 | gnu_ops.to_attach_no_wait = 1; /* to_attach_no_wait */ |
c5aa993b | 2628 | gnu_ops.to_detach = gnu_detach; /* to_detach */ |
c5aa993b | 2629 | gnu_ops.to_resume = gnu_resume; /* to_resume */ |
942fd805 | 2630 | gnu_ops.to_wait = gnu_wait; /* to_wait */ |
942fd805 MK |
2631 | gnu_ops.to_fetch_registers = gnu_fetch_registers; /* to_fetch_registers */ |
2632 | gnu_ops.to_store_registers = gnu_store_registers; /* to_store_registers */ | |
2633 | gnu_ops.to_prepare_to_store = gnu_prepare_to_store; /* to_prepare_to_store */ | |
c8e73a31 | 2634 | gnu_ops.deprecated_xfer_memory = gnu_xfer_memory; |
57e76fac | 2635 | gnu_ops.to_find_memory_regions = gnu_find_memory_regions; |
c5aa993b JM |
2636 | gnu_ops.to_insert_breakpoint = memory_insert_breakpoint; |
2637 | gnu_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
2638 | gnu_ops.to_terminal_init = gnu_terminal_init_inferior; | |
2639 | gnu_ops.to_terminal_inferior = terminal_inferior; | |
2640 | gnu_ops.to_terminal_ours_for_output = terminal_ours_for_output; | |
a790ad35 | 2641 | gnu_ops.to_terminal_save_ours = terminal_save_ours; |
c5aa993b JM |
2642 | gnu_ops.to_terminal_ours = terminal_ours; |
2643 | gnu_ops.to_terminal_info = child_terminal_info; | |
2644 | gnu_ops.to_kill = gnu_kill_inferior; /* to_kill */ | |
942fd805 | 2645 | gnu_ops.to_create_inferior = gnu_create_inferior; /* to_create_inferior */ |
c5aa993b JM |
2646 | gnu_ops.to_mourn_inferior = gnu_mourn_inferior; /* to_mourn_inferior */ |
2647 | gnu_ops.to_can_run = gnu_can_run; /* to_can_run */ | |
c5aa993b | 2648 | gnu_ops.to_thread_alive = gnu_thread_alive; /* to_thread_alive */ |
ed9a39eb | 2649 | gnu_ops.to_pid_to_str = gnu_pid_to_str; /* to_pid_to_str */ |
c5aa993b | 2650 | gnu_ops.to_stop = gnu_stop; /* to_stop */ |
c5aa993b | 2651 | gnu_ops.to_stratum = process_stratum; /* to_stratum */ |
c5aa993b | 2652 | gnu_ops.to_has_all_memory = 1; /* to_has_all_memory */ |
942fd805 MK |
2653 | gnu_ops.to_has_memory = 1; /* to_has_memory */ |
2654 | gnu_ops.to_has_stack = 1; /* to_has_stack */ | |
2655 | gnu_ops.to_has_registers = 1; /* to_has_registers */ | |
2656 | gnu_ops.to_has_execution = 1; /* to_has_execution */ | |
942fd805 | 2657 | gnu_ops.to_magic = OPS_MAGIC; /* to_magic */ |
c5aa993b | 2658 | } /* init_gnu_ops */ |
942fd805 | 2659 | |
c906108c | 2660 | \f |
c906108c SS |
2661 | /* User task commands. */ |
2662 | ||
2663 | struct cmd_list_element *set_task_cmd_list = 0; | |
2664 | struct cmd_list_element *show_task_cmd_list = 0; | |
2665 | /* User thread commands. */ | |
2666 | ||
2667 | /* Commands with a prefix of `set/show thread'. */ | |
2668 | extern struct cmd_list_element *thread_cmd_list; | |
2669 | struct cmd_list_element *set_thread_cmd_list = NULL; | |
2670 | struct cmd_list_element *show_thread_cmd_list = NULL; | |
2671 | ||
2672 | /* Commands with a prefix of `set/show thread default'. */ | |
2673 | struct cmd_list_element *set_thread_default_cmd_list = NULL; | |
2674 | struct cmd_list_element *show_thread_default_cmd_list = NULL; | |
2675 | ||
2676 | static void | |
2677 | set_thread_cmd (char *args, int from_tty) | |
2678 | { | |
9846de1b | 2679 | printf_unfiltered ("\"set thread\" must be followed by the name of a thread property, or \"default\".\n"); |
c906108c SS |
2680 | } |
2681 | ||
2682 | static void | |
2683 | show_thread_cmd (char *args, int from_tty) | |
2684 | { | |
2685 | printf_unfiltered ("\"show thread\" must be followed by the name of a thread property, or \"default\".\n"); | |
2686 | } | |
2687 | ||
2688 | static void | |
2689 | set_thread_default_cmd (char *args, int from_tty) | |
2690 | { | |
2691 | printf_unfiltered ("\"set thread default\" must be followed by the name of a thread property.\n"); | |
2692 | } | |
2693 | ||
2694 | static void | |
2695 | show_thread_default_cmd (char *args, int from_tty) | |
2696 | { | |
2697 | printf_unfiltered ("\"show thread default\" must be followed by the name of a thread property.\n"); | |
2698 | } | |
2699 | ||
2700 | static int | |
2701 | parse_int_arg (char *args, char *cmd_prefix) | |
2702 | { | |
2703 | if (args) | |
2704 | { | |
2705 | char *arg_end; | |
2706 | int val = strtoul (args, &arg_end, 10); | |
2707 | if (*args && *arg_end == '\0') | |
2708 | return val; | |
2709 | } | |
8a3fe4f8 | 2710 | error (_("Illegal argument for \"%s\" command, should be an integer."), cmd_prefix); |
c906108c SS |
2711 | } |
2712 | ||
2713 | static int | |
2714 | _parse_bool_arg (char *args, char *t_val, char *f_val, char *cmd_prefix) | |
2715 | { | |
2716 | if (!args || strcmp (args, t_val) == 0) | |
2717 | return 1; | |
2718 | else if (strcmp (args, f_val) == 0) | |
2719 | return 0; | |
2720 | else | |
8a3fe4f8 | 2721 | error (_("Illegal argument for \"%s\" command, should be \"%s\" or \"%s\"."), |
c906108c SS |
2722 | cmd_prefix, t_val, f_val); |
2723 | } | |
2724 | ||
2725 | #define parse_bool_arg(args, cmd_prefix) \ | |
2726 | _parse_bool_arg (args, "on", "off", cmd_prefix) | |
2727 | ||
2728 | static void | |
2729 | check_empty (char *args, char *cmd_prefix) | |
2730 | { | |
2731 | if (args) | |
8a3fe4f8 | 2732 | error (_("Garbage after \"%s\" command: `%s'"), cmd_prefix, args); |
c906108c SS |
2733 | } |
2734 | ||
2735 | /* Returns the alive thread named by INFERIOR_PID, or signals an error. */ | |
2736 | static struct proc * | |
fba45db2 | 2737 | cur_thread (void) |
c906108c SS |
2738 | { |
2739 | struct inf *inf = cur_inf (); | |
617fd3b5 PA |
2740 | struct proc *thread = inf_tid_to_thread (inf, |
2741 | ptid_get_tid (inferior_ptid)); | |
c906108c | 2742 | if (!thread) |
8a3fe4f8 | 2743 | error (_("No current thread.")); |
c906108c SS |
2744 | return thread; |
2745 | } | |
2746 | ||
2747 | /* Returns the current inferior, but signals an error if it has no task. */ | |
2748 | static struct inf * | |
fba45db2 | 2749 | active_inf (void) |
c906108c SS |
2750 | { |
2751 | struct inf *inf = cur_inf (); | |
c5aa993b | 2752 | if (!inf->task) |
8a3fe4f8 | 2753 | error (_("No current process.")); |
c906108c SS |
2754 | return inf; |
2755 | } | |
942fd805 | 2756 | |
c906108c SS |
2757 | \f |
2758 | static void | |
2759 | set_task_pause_cmd (char *args, int from_tty) | |
2760 | { | |
2761 | struct inf *inf = cur_inf (); | |
2762 | int old_sc = inf->pause_sc; | |
2763 | ||
2764 | inf->pause_sc = parse_bool_arg (args, "set task pause"); | |
2765 | ||
2766 | if (old_sc == 0 && inf->pause_sc != 0) | |
2767 | /* If the task is currently unsuspended, immediately suspend it, | |
2768 | otherwise wait until the next time it gets control. */ | |
2769 | inf_suspend (inf); | |
2770 | } | |
2771 | ||
2772 | static void | |
2773 | show_task_pause_cmd (char *args, int from_tty) | |
2774 | { | |
2775 | struct inf *inf = cur_inf (); | |
2776 | check_empty (args, "show task pause"); | |
2777 | printf_unfiltered ("The inferior task %s suspended while gdb has control.\n", | |
2778 | inf->task | |
2779 | ? (inf->pause_sc == 0 ? "isn't" : "is") | |
2780 | : (inf->pause_sc == 0 ? "won't be" : "will be")); | |
2781 | } | |
2782 | ||
2783 | static void | |
2784 | set_task_detach_sc_cmd (char *args, int from_tty) | |
2785 | { | |
2786 | cur_inf ()->detach_sc = parse_int_arg (args, "set task detach-suspend-count"); | |
2787 | } | |
2788 | ||
2789 | static void | |
2790 | show_task_detach_sc_cmd (char *args, int from_tty) | |
2791 | { | |
2792 | check_empty (args, "show task detach-suspend-count"); | |
2793 | printf_unfiltered ("The inferior task will be left with a suspend count of %d when detaching.\n", | |
2794 | cur_inf ()->detach_sc); | |
2795 | } | |
942fd805 | 2796 | |
c906108c SS |
2797 | \f |
2798 | static void | |
2799 | set_thread_default_pause_cmd (char *args, int from_tty) | |
2800 | { | |
2801 | struct inf *inf = cur_inf (); | |
2802 | inf->default_thread_pause_sc = | |
2803 | parse_bool_arg (args, "set thread default pause") ? 0 : 1; | |
2804 | } | |
2805 | ||
2806 | static void | |
2807 | show_thread_default_pause_cmd (char *args, int from_tty) | |
2808 | { | |
2809 | struct inf *inf = cur_inf (); | |
2810 | int sc = inf->default_thread_pause_sc; | |
2811 | check_empty (args, "show thread default pause"); | |
2812 | printf_unfiltered ("New threads %s suspended while gdb has control%s.\n", | |
2813 | sc ? "are" : "aren't", | |
2814 | !sc && inf->pause_sc ? " (but the task is)" : ""); | |
2815 | } | |
2816 | ||
2817 | static void | |
2818 | set_thread_default_run_cmd (char *args, int from_tty) | |
2819 | { | |
2820 | struct inf *inf = cur_inf (); | |
2821 | inf->default_thread_run_sc = | |
2822 | parse_bool_arg (args, "set thread default run") ? 0 : 1; | |
2823 | } | |
2824 | ||
2825 | static void | |
2826 | show_thread_default_run_cmd (char *args, int from_tty) | |
2827 | { | |
2828 | struct inf *inf = cur_inf (); | |
2829 | check_empty (args, "show thread default run"); | |
2830 | printf_unfiltered ("New threads %s allowed to run.\n", | |
2831 | inf->default_thread_run_sc == 0 ? "are" : "aren't"); | |
2832 | } | |
2833 | ||
2834 | static void | |
2835 | set_thread_default_detach_sc_cmd (char *args, int from_tty) | |
2836 | { | |
2837 | cur_inf ()->default_thread_detach_sc = | |
2838 | parse_int_arg (args, "set thread default detach-suspend-count"); | |
2839 | } | |
2840 | ||
2841 | static void | |
2842 | show_thread_default_detach_sc_cmd (char *args, int from_tty) | |
2843 | { | |
2844 | check_empty (args, "show thread default detach-suspend-count"); | |
2845 | printf_unfiltered ("New threads will get a detach-suspend-count of %d.\n", | |
2846 | cur_inf ()->default_thread_detach_sc); | |
2847 | } | |
942fd805 | 2848 | |
c906108c SS |
2849 | \f |
2850 | /* Steal a send right called NAME in the inferior task, and make it PROC's | |
2851 | saved exception port. */ | |
2852 | static void | |
2853 | steal_exc_port (struct proc *proc, mach_port_t name) | |
2854 | { | |
2855 | error_t err; | |
2856 | mach_port_t port; | |
2857 | mach_msg_type_name_t port_type; | |
2858 | ||
2859 | if (!proc || !proc->inf->task) | |
8a3fe4f8 | 2860 | error (_("No inferior task.")); |
c906108c SS |
2861 | |
2862 | err = mach_port_extract_right (proc->inf->task->port, | |
2863 | name, MACH_MSG_TYPE_COPY_SEND, | |
2864 | &port, &port_type); | |
2865 | if (err) | |
8a3fe4f8 | 2866 | error (_("Couldn't extract send right %d from inferior: %s"), |
dc672865 | 2867 | name, safe_strerror (err)); |
c906108c SS |
2868 | |
2869 | if (proc->saved_exc_port) | |
2870 | /* Get rid of our reference to the old one. */ | |
2871 | mach_port_deallocate (mach_task_self (), proc->saved_exc_port); | |
2872 | ||
2873 | proc->saved_exc_port = port; | |
2874 | ||
c5aa993b | 2875 | if (!proc->exc_port) |
c906108c SS |
2876 | /* If PROC is a thread, we may not have set its exception port before. |
2877 | We can't use proc_steal_exc_port because it also sets saved_exc_port. */ | |
2878 | { | |
c5aa993b JM |
2879 | proc->exc_port = proc->inf->event_port; |
2880 | err = proc_set_exception_port (proc, proc->exc_port); | |
8a3fe4f8 | 2881 | error (_("Can't set exception port for %s: %s"), |
dc672865 | 2882 | proc_string (proc), safe_strerror (err)); |
c906108c SS |
2883 | } |
2884 | } | |
942fd805 | 2885 | |
c906108c SS |
2886 | static void |
2887 | set_task_exc_port_cmd (char *args, int from_tty) | |
2888 | { | |
2889 | struct inf *inf = cur_inf (); | |
2890 | if (!args) | |
8a3fe4f8 | 2891 | error (_("No argument to \"set task exception-port\" command.")); |
c906108c SS |
2892 | steal_exc_port (inf->task, parse_and_eval_address (args)); |
2893 | } | |
2894 | ||
c5aa993b | 2895 | static void |
c906108c SS |
2896 | set_stopped_cmd (char *args, int from_tty) |
2897 | { | |
2898 | cur_inf ()->stopped = _parse_bool_arg (args, "yes", "no", "set stopped"); | |
2899 | } | |
2900 | ||
2901 | static void | |
2902 | show_stopped_cmd (char *args, int from_tty) | |
2903 | { | |
2904 | struct inf *inf = active_inf (); | |
2905 | check_empty (args, "show stopped"); | |
2906 | printf_unfiltered ("The inferior process %s stopped.\n", | |
2907 | inf->stopped ? "is" : "isn't"); | |
2908 | } | |
2909 | ||
c5aa993b | 2910 | static void |
c906108c SS |
2911 | set_sig_thread_cmd (char *args, int from_tty) |
2912 | { | |
c906108c SS |
2913 | struct inf *inf = cur_inf (); |
2914 | ||
c5aa993b | 2915 | if (!args || (!isdigit (*args) && strcmp (args, "none") != 0)) |
8a3fe4f8 AC |
2916 | error (_("Illegal argument to \"set signal-thread\" command.\n" |
2917 | "Should be an integer thread ID, or `none'.")); | |
c906108c SS |
2918 | |
2919 | if (strcmp (args, "none") == 0) | |
2920 | inf->signal_thread = 0; | |
2921 | else | |
2922 | { | |
617fd3b5 | 2923 | int tid = ptid_get_tid (thread_id_to_pid (atoi (args))); |
c906108c | 2924 | if (tid < 0) |
8a3fe4f8 AC |
2925 | error (_("Thread ID %s not known. Use the \"info threads\" command to\n" |
2926 | "see the IDs of currently known threads."), args); | |
c906108c SS |
2927 | inf->signal_thread = inf_tid_to_thread (inf, tid); |
2928 | } | |
2929 | } | |
2930 | ||
2931 | static void | |
2932 | show_sig_thread_cmd (char *args, int from_tty) | |
2933 | { | |
2934 | struct inf *inf = active_inf (); | |
2935 | check_empty (args, "show signal-thread"); | |
2936 | if (inf->signal_thread) | |
2937 | printf_unfiltered ("The signal thread is %s.\n", | |
2938 | proc_string (inf->signal_thread)); | |
2939 | else | |
2940 | printf_unfiltered ("There is no signal thread.\n"); | |
2941 | } | |
942fd805 | 2942 | |
c906108c | 2943 | \f |
c5aa993b | 2944 | static void |
c906108c SS |
2945 | set_signals_cmd (char *args, int from_tty) |
2946 | { | |
c906108c SS |
2947 | struct inf *inf = cur_inf (); |
2948 | ||
2949 | inf->want_signals = parse_bool_arg (args, "set signals"); | |
2950 | ||
2951 | if (inf->task && inf->want_signals != inf->traced) | |
2952 | /* Make this take effect immediately in a running process. */ | |
2953 | inf_set_traced (inf, inf->want_signals); | |
2954 | } | |
2955 | ||
2956 | static void | |
2957 | show_signals_cmd (char *args, int from_tty) | |
2958 | { | |
2959 | struct inf *inf = cur_inf (); | |
2960 | check_empty (args, "show signals"); | |
2961 | printf_unfiltered ("The inferior process's signals %s intercepted.\n", | |
2962 | inf->task | |
2963 | ? (inf->traced ? "are" : "aren't") | |
2964 | : (inf->want_signals ? "will be" : "won't be")); | |
2965 | } | |
2966 | ||
c5aa993b | 2967 | static void |
c906108c SS |
2968 | set_exceptions_cmd (char *args, int from_tty) |
2969 | { | |
2970 | struct inf *inf = cur_inf (); | |
2971 | int val = parse_bool_arg (args, "set exceptions"); | |
2972 | ||
2973 | if (inf->task && inf->want_exceptions != val) | |
2974 | /* Make this take effect immediately in a running process. */ | |
c5aa993b | 2975 | /* XXX */ ; |
c906108c SS |
2976 | |
2977 | inf->want_exceptions = val; | |
2978 | } | |
2979 | ||
2980 | static void | |
2981 | show_exceptions_cmd (char *args, int from_tty) | |
2982 | { | |
2983 | struct inf *inf = cur_inf (); | |
2984 | check_empty (args, "show exceptions"); | |
2985 | printf_unfiltered ("Exceptions in the inferior %s trapped.\n", | |
2986 | inf->task | |
2987 | ? (inf->want_exceptions ? "are" : "aren't") | |
2988 | : (inf->want_exceptions ? "will be" : "won't be")); | |
2989 | } | |
942fd805 | 2990 | |
c906108c SS |
2991 | \f |
2992 | static void | |
2993 | set_task_cmd (char *args, int from_tty) | |
2994 | { | |
942fd805 MK |
2995 | printf_unfiltered ("\"set task\" must be followed by the name" |
2996 | " of a task property.\n"); | |
c906108c SS |
2997 | } |
2998 | ||
2999 | static void | |
3000 | show_task_cmd (char *args, int from_tty) | |
3001 | { | |
3002 | struct inf *inf = cur_inf (); | |
3003 | ||
3004 | check_empty (args, "show task"); | |
3005 | ||
3006 | show_signals_cmd (0, from_tty); | |
3007 | show_exceptions_cmd (0, from_tty); | |
3008 | show_task_pause_cmd (0, from_tty); | |
3009 | ||
3010 | if (inf->pause_sc == 0) | |
3011 | show_thread_default_pause_cmd (0, from_tty); | |
3012 | show_thread_default_run_cmd (0, from_tty); | |
3013 | ||
3014 | if (inf->task) | |
3015 | { | |
3016 | show_stopped_cmd (0, from_tty); | |
3017 | show_sig_thread_cmd (0, from_tty); | |
3018 | } | |
3019 | ||
3020 | if (inf->detach_sc != 0) | |
3021 | show_task_detach_sc_cmd (0, from_tty); | |
3022 | if (inf->default_thread_detach_sc != 0) | |
3023 | show_thread_default_detach_sc_cmd (0, from_tty); | |
3024 | } | |
942fd805 | 3025 | |
c906108c SS |
3026 | \f |
3027 | static void | |
3028 | set_noninvasive_cmd (char *args, int from_tty) | |
3029 | { | |
3030 | /* Invert the sense of the arg for each component. */ | |
3031 | char *inv_args = parse_bool_arg (args, "set noninvasive") ? "off" : "on"; | |
3032 | ||
3033 | set_task_pause_cmd (inv_args, from_tty); | |
3034 | set_signals_cmd (inv_args, from_tty); | |
3035 | set_exceptions_cmd (inv_args, from_tty); | |
3036 | } | |
942fd805 | 3037 | |
c906108c SS |
3038 | \f |
3039 | static void | |
3040 | info_port_rights (char *args, mach_port_type_t only) | |
3041 | { | |
3042 | struct inf *inf = active_inf (); | |
3d6d86c6 | 3043 | struct value *vmark = value_mark (); |
c906108c SS |
3044 | |
3045 | if (args) | |
3046 | /* Explicit list of port rights. */ | |
3047 | { | |
3048 | while (*args) | |
3049 | { | |
3d6d86c6 | 3050 | struct value *val = parse_to_comma_and_eval (&args); |
c906108c SS |
3051 | long right = value_as_long (val); |
3052 | error_t err = | |
c5aa993b JM |
3053 | print_port_info (right, 0, inf->task->port, PORTINFO_DETAILS, |
3054 | stdout); | |
c906108c | 3055 | if (err) |
8a3fe4f8 | 3056 | error (_("%ld: %s."), right, safe_strerror (err)); |
c906108c SS |
3057 | } |
3058 | } | |
3059 | else | |
3060 | /* Print all of them. */ | |
3061 | { | |
3062 | error_t err = | |
c5aa993b JM |
3063 | print_task_ports_info (inf->task->port, only, PORTINFO_DETAILS, |
3064 | stdout); | |
c906108c | 3065 | if (err) |
8a3fe4f8 | 3066 | error (_("%s."), safe_strerror (err)); |
c906108c SS |
3067 | } |
3068 | ||
3069 | value_free_to_mark (vmark); | |
3070 | } | |
3071 | ||
3072 | static void | |
3073 | info_send_rights_cmd (char *args, int from_tty) | |
3074 | { | |
3075 | info_port_rights (args, MACH_PORT_TYPE_SEND); | |
3076 | } | |
942fd805 | 3077 | |
c906108c SS |
3078 | static void |
3079 | info_recv_rights_cmd (char *args, int from_tty) | |
3080 | { | |
3081 | info_port_rights (args, MACH_PORT_TYPE_RECEIVE); | |
3082 | } | |
942fd805 | 3083 | |
c906108c SS |
3084 | static void |
3085 | info_port_sets_cmd (char *args, int from_tty) | |
3086 | { | |
3087 | info_port_rights (args, MACH_PORT_TYPE_PORT_SET); | |
3088 | } | |
942fd805 | 3089 | |
c906108c SS |
3090 | static void |
3091 | info_dead_names_cmd (char *args, int from_tty) | |
3092 | { | |
3093 | info_port_rights (args, MACH_PORT_TYPE_DEAD_NAME); | |
3094 | } | |
942fd805 | 3095 | |
c906108c SS |
3096 | static void |
3097 | info_port_rights_cmd (char *args, int from_tty) | |
3098 | { | |
3099 | info_port_rights (args, ~0); | |
3100 | } | |
942fd805 | 3101 | |
c906108c | 3102 | \f |
c5aa993b | 3103 | static void |
942fd805 | 3104 | add_task_commands (void) |
c906108c | 3105 | { |
1a966eab AC |
3106 | add_cmd ("pause", class_run, set_thread_default_pause_cmd, _("\ |
3107 | Set whether the new threads are suspended while gdb has control.\n\ | |
942fd805 MK |
3108 | This property normally has no effect because the whole task is\n\ |
3109 | suspended, however, that may be disabled with \"set task pause off\".\n\ | |
1a966eab | 3110 | The default value is \"off\"."), |
c906108c | 3111 | &set_thread_default_cmd_list); |
1a966eab AC |
3112 | add_cmd ("pause", no_class, show_thread_default_pause_cmd, _("\ |
3113 | Show whether new threads are suspended while gdb has control."), | |
c906108c | 3114 | &show_thread_default_cmd_list); |
942fd805 | 3115 | |
1a966eab AC |
3116 | add_cmd ("run", class_run, set_thread_default_run_cmd, _("\ |
3117 | Set whether new threads are allowed to run (once gdb has noticed them)."), | |
c906108c | 3118 | &set_thread_default_cmd_list); |
1a966eab AC |
3119 | add_cmd ("run", no_class, show_thread_default_run_cmd, _("\ |
3120 | Show whether new threads are allowed to run (once gdb has noticed them)."), | |
c906108c | 3121 | &show_thread_default_cmd_list); |
942fd805 | 3122 | |
c906108c | 3123 | add_cmd ("detach-suspend-count", class_run, set_thread_default_detach_sc_cmd, |
1a966eab | 3124 | _("Set the default detach-suspend-count value for new threads."), |
c906108c SS |
3125 | &set_thread_default_cmd_list); |
3126 | add_cmd ("detach-suspend-count", no_class, show_thread_default_detach_sc_cmd, | |
1a966eab | 3127 | _("Show the default detach-suspend-count value for new threads."), |
c906108c SS |
3128 | &show_thread_default_cmd_list); |
3129 | ||
1a966eab AC |
3130 | add_cmd ("signals", class_run, set_signals_cmd, _("\ |
3131 | Set whether the inferior process's signals will be intercepted.\n\ | |
3132 | Mach exceptions (such as breakpoint traps) are not affected."), | |
c906108c SS |
3133 | &setlist); |
3134 | add_alias_cmd ("sigs", "signals", class_run, 1, &setlist); | |
1a966eab AC |
3135 | add_cmd ("signals", no_class, show_signals_cmd, _("\ |
3136 | Show whether the inferior process's signals will be intercepted."), | |
c906108c SS |
3137 | &showlist); |
3138 | add_alias_cmd ("sigs", "signals", no_class, 1, &showlist); | |
3139 | ||
1a966eab AC |
3140 | add_cmd ("signal-thread", class_run, set_sig_thread_cmd, _("\ |
3141 | Set the thread that gdb thinks is the libc signal thread.\n\ | |
3142 | This thread is run when delivering a signal to a non-stopped process."), | |
c906108c SS |
3143 | &setlist); |
3144 | add_alias_cmd ("sigthread", "signal-thread", class_run, 1, &setlist); | |
1a966eab AC |
3145 | add_cmd ("signal-thread", no_class, show_sig_thread_cmd, _("\ |
3146 | Set the thread that gdb thinks is the libc signal thread."), | |
c906108c SS |
3147 | &showlist); |
3148 | add_alias_cmd ("sigthread", "signal-thread", no_class, 1, &showlist); | |
3149 | ||
1a966eab AC |
3150 | add_cmd ("stopped", class_run, set_stopped_cmd, _("\ |
3151 | Set whether gdb thinks the inferior process is stopped as with SIGSTOP.\n\ | |
3152 | Stopped process will be continued by sending them a signal."), | |
c906108c | 3153 | &setlist); |
1a966eab AC |
3154 | add_cmd ("stopped", no_class, show_signals_cmd, _("\ |
3155 | Show whether gdb thinks the inferior process is stopped as with SIGSTOP."), | |
c906108c SS |
3156 | &showlist); |
3157 | ||
1a966eab AC |
3158 | add_cmd ("exceptions", class_run, set_exceptions_cmd, _("\ |
3159 | Set whether exceptions in the inferior process will be trapped.\n\ | |
942fd805 | 3160 | When exceptions are turned off, neither breakpoints nor single-stepping\n\ |
1a966eab | 3161 | will work."), |
c906108c SS |
3162 | &setlist); |
3163 | /* Allow `set exc' despite conflict with `set exception-port'. */ | |
3164 | add_alias_cmd ("exc", "exceptions", class_run, 1, &setlist); | |
1a966eab AC |
3165 | add_cmd ("exceptions", no_class, show_exceptions_cmd, _("\ |
3166 | Show whether exceptions in the inferior process will be trapped."), | |
c906108c SS |
3167 | &showlist); |
3168 | ||
3169 | add_prefix_cmd ("task", no_class, set_task_cmd, | |
1bedd215 | 3170 | _("Command prefix for setting task attributes."), |
c906108c SS |
3171 | &set_task_cmd_list, "set task ", 0, &setlist); |
3172 | add_prefix_cmd ("task", no_class, show_task_cmd, | |
1bedd215 | 3173 | _("Command prefix for showing task attributes."), |
c906108c SS |
3174 | &show_task_cmd_list, "show task ", 0, &showlist); |
3175 | ||
1a966eab AC |
3176 | add_cmd ("pause", class_run, set_task_pause_cmd, _("\ |
3177 | Set whether the task is suspended while gdb has control.\n\ | |
942fd805 MK |
3178 | A value of \"on\" takes effect immediately, otherwise nothing happens\n\ |
3179 | until the next time the program is continued.\n\ | |
3180 | When setting this to \"off\", \"set thread default pause on\" can be\n\ | |
1a966eab | 3181 | used to pause individual threads by default instead."), |
c906108c SS |
3182 | &set_task_cmd_list); |
3183 | add_cmd ("pause", no_class, show_task_pause_cmd, | |
1a966eab | 3184 | _("Show whether the task is suspended while gdb has control."), |
c906108c | 3185 | &show_task_cmd_list); |
942fd805 | 3186 | |
c906108c | 3187 | add_cmd ("detach-suspend-count", class_run, set_task_detach_sc_cmd, |
1a966eab | 3188 | _("Set the suspend count will leave on the thread when detaching."), |
c906108c SS |
3189 | &set_task_cmd_list); |
3190 | add_cmd ("detach-suspend-count", no_class, show_task_detach_sc_cmd, | |
1a966eab | 3191 | _("Show the suspend count will leave on the thread when detaching."), |
c906108c SS |
3192 | &show_task_cmd_list); |
3193 | ||
1a966eab AC |
3194 | add_cmd ("exception-port", no_class, set_task_exc_port_cmd, _("\ |
3195 | Set the task exception port to which we forward exceptions.\n\ | |
3196 | The argument should be the value of the send right in the task."), | |
c906108c SS |
3197 | &set_task_cmd_list); |
3198 | add_alias_cmd ("excp", "exception-port", no_class, 1, &set_task_cmd_list); | |
942fd805 MK |
3199 | add_alias_cmd ("exc-port", "exception-port", no_class, 1, |
3200 | &set_task_cmd_list); | |
c906108c SS |
3201 | |
3202 | /* A convenient way of turning on all options require to noninvasively | |
3203 | debug running tasks. */ | |
1a966eab AC |
3204 | add_cmd ("noninvasive", no_class, set_noninvasive_cmd, _("\ |
3205 | Set task options so that we interfere as little as possible.\n\ | |
942fd805 | 3206 | This is the same as setting `task pause', `exceptions', and\n\ |
1a966eab | 3207 | `signals' to the opposite value."), |
c906108c SS |
3208 | &setlist); |
3209 | ||
3210 | /* Commands to show information about the task's ports. */ | |
3211 | add_cmd ("send-rights", class_info, info_send_rights_cmd, | |
1a966eab | 3212 | _("Show information about the task's send rights"), |
c906108c SS |
3213 | &infolist); |
3214 | add_cmd ("receive-rights", class_info, info_recv_rights_cmd, | |
1a966eab | 3215 | _("Show information about the task's receive rights"), |
c906108c | 3216 | &infolist); |
942fd805 | 3217 | add_cmd ("port-rights", class_info, info_port_rights_cmd, |
1a966eab | 3218 | _("Show information about the task's port rights"), |
c906108c SS |
3219 | &infolist); |
3220 | add_cmd ("port-sets", class_info, info_port_sets_cmd, | |
1a966eab | 3221 | _("Show information about the task's port sets"), |
c906108c SS |
3222 | &infolist); |
3223 | add_cmd ("dead-names", class_info, info_dead_names_cmd, | |
1a966eab | 3224 | _("Show information about the task's dead names"), |
c906108c SS |
3225 | &infolist); |
3226 | add_info_alias ("ports", "port-rights", 1); | |
3227 | add_info_alias ("port", "port-rights", 1); | |
3228 | add_info_alias ("psets", "port-sets", 1); | |
3229 | } | |
c906108c | 3230 | |
942fd805 | 3231 | \f |
c906108c SS |
3232 | static void |
3233 | set_thread_pause_cmd (char *args, int from_tty) | |
3234 | { | |
3235 | struct proc *thread = cur_thread (); | |
3236 | int old_sc = thread->pause_sc; | |
3237 | thread->pause_sc = parse_bool_arg (args, "set thread pause"); | |
3238 | if (old_sc == 0 && thread->pause_sc != 0 && thread->inf->pause_sc == 0) | |
3239 | /* If the task is currently unsuspended, immediately suspend it, | |
3240 | otherwise wait until the next time it gets control. */ | |
3241 | inf_suspend (thread->inf); | |
3242 | } | |
3243 | ||
3244 | static void | |
3245 | show_thread_pause_cmd (char *args, int from_tty) | |
3246 | { | |
3247 | struct proc *thread = cur_thread (); | |
3248 | int sc = thread->pause_sc; | |
3249 | check_empty (args, "show task pause"); | |
3250 | printf_unfiltered ("Thread %s %s suspended while gdb has control%s.\n", | |
3251 | proc_string (thread), | |
3252 | sc ? "is" : "isn't", | |
942fd805 | 3253 | !sc && thread->inf->pause_sc ? " (but the task is)" : ""); |
c906108c SS |
3254 | } |
3255 | ||
3256 | static void | |
3257 | set_thread_run_cmd (char *args, int from_tty) | |
3258 | { | |
3259 | struct proc *thread = cur_thread (); | |
3260 | thread->run_sc = parse_bool_arg (args, "set thread run") ? 0 : 1; | |
3261 | } | |
3262 | ||
3263 | static void | |
3264 | show_thread_run_cmd (char *args, int from_tty) | |
3265 | { | |
3266 | struct proc *thread = cur_thread (); | |
3267 | check_empty (args, "show thread run"); | |
3268 | printf_unfiltered ("Thread %s %s allowed to run.", | |
3269 | proc_string (thread), | |
3270 | thread->run_sc == 0 ? "is" : "isn't"); | |
3271 | } | |
3272 | ||
3273 | static void | |
3274 | set_thread_detach_sc_cmd (char *args, int from_tty) | |
3275 | { | |
942fd805 MK |
3276 | cur_thread ()->detach_sc = parse_int_arg (args, |
3277 | "set thread detach-suspend-count"); | |
c906108c SS |
3278 | } |
3279 | ||
3280 | static void | |
3281 | show_thread_detach_sc_cmd (char *args, int from_tty) | |
3282 | { | |
3283 | struct proc *thread = cur_thread (); | |
3284 | check_empty (args, "show thread detach-suspend-count"); | |
942fd805 MK |
3285 | printf_unfiltered ("Thread %s will be left with a suspend count" |
3286 | " of %d when detaching.\n", | |
c906108c SS |
3287 | proc_string (thread), |
3288 | thread->detach_sc); | |
3289 | } | |
3290 | ||
3291 | static void | |
3292 | set_thread_exc_port_cmd (char *args, int from_tty) | |
3293 | { | |
3294 | struct proc *thread = cur_thread (); | |
3295 | if (!args) | |
8a3fe4f8 | 3296 | error (_("No argument to \"set thread exception-port\" command.")); |
c906108c SS |
3297 | steal_exc_port (thread, parse_and_eval_address (args)); |
3298 | } | |
3299 | ||
3300 | #if 0 | |
3301 | static void | |
3302 | show_thread_cmd (char *args, int from_tty) | |
3303 | { | |
3304 | struct proc *thread = cur_thread (); | |
3305 | check_empty (args, "show thread"); | |
3306 | show_thread_run_cmd (0, from_tty); | |
3307 | show_thread_pause_cmd (0, from_tty); | |
3308 | if (thread->detach_sc != 0) | |
3309 | show_thread_detach_sc_cmd (0, from_tty); | |
3310 | } | |
3311 | #endif | |
3312 | ||
3313 | static void | |
3314 | thread_takeover_sc_cmd (char *args, int from_tty) | |
3315 | { | |
3316 | struct proc *thread = cur_thread (); | |
3317 | thread_basic_info_data_t _info; | |
3318 | thread_basic_info_t info = &_info; | |
3319 | mach_msg_type_number_t info_len = THREAD_BASIC_INFO_COUNT; | |
3320 | error_t err = | |
c5aa993b | 3321 | thread_info (thread->port, THREAD_BASIC_INFO, (int *) &info, &info_len); |
c906108c | 3322 | if (err) |
8a3fe4f8 | 3323 | error (("%s."), safe_strerror (err)); |
c906108c SS |
3324 | thread->sc = info->suspend_count; |
3325 | if (from_tty) | |
3326 | printf_unfiltered ("Suspend count was %d.\n", thread->sc); | |
3327 | if (info != &_info) | |
942fd805 MK |
3328 | vm_deallocate (mach_task_self (), (vm_address_t) info, |
3329 | info_len * sizeof (int)); | |
c906108c SS |
3330 | } |
3331 | ||
942fd805 MK |
3332 | \f |
3333 | static void | |
3334 | add_thread_commands (void) | |
c906108c SS |
3335 | { |
3336 | add_prefix_cmd ("thread", no_class, set_thread_cmd, | |
1bedd215 | 3337 | _("Command prefix for setting thread properties."), |
c906108c SS |
3338 | &set_thread_cmd_list, "set thread ", 0, &setlist); |
3339 | add_prefix_cmd ("default", no_class, show_thread_cmd, | |
1bedd215 | 3340 | _("Command prefix for setting default thread properties."), |
c906108c SS |
3341 | &set_thread_default_cmd_list, "set thread default ", 0, |
3342 | &set_thread_cmd_list); | |
3343 | add_prefix_cmd ("thread", no_class, set_thread_default_cmd, | |
1bedd215 | 3344 | _("Command prefix for showing thread properties."), |
c906108c SS |
3345 | &show_thread_cmd_list, "show thread ", 0, &showlist); |
3346 | add_prefix_cmd ("default", no_class, show_thread_default_cmd, | |
1bedd215 | 3347 | _("Command prefix for showing default thread properties."), |
c906108c SS |
3348 | &show_thread_default_cmd_list, "show thread default ", 0, |
3349 | &show_thread_cmd_list); | |
3350 | ||
1a966eab AC |
3351 | add_cmd ("pause", class_run, set_thread_pause_cmd, _("\ |
3352 | Set whether the current thread is suspended while gdb has control.\n\ | |
942fd805 MK |
3353 | A value of \"on\" takes effect immediately, otherwise nothing happens\n\ |
3354 | until the next time the program is continued. This property normally\n\ | |
3355 | has no effect because the whole task is suspended, however, that may\n\ | |
3356 | be disabled with \"set task pause off\".\n\ | |
1a966eab | 3357 | The default value is \"off\"."), |
c906108c | 3358 | &set_thread_cmd_list); |
1a966eab AC |
3359 | add_cmd ("pause", no_class, show_thread_pause_cmd, _("\ |
3360 | Show whether the current thread is suspended while gdb has control."), | |
c906108c SS |
3361 | &show_thread_cmd_list); |
3362 | ||
3363 | add_cmd ("run", class_run, set_thread_run_cmd, | |
1a966eab | 3364 | _("Set whether the current thread is allowed to run."), |
c906108c SS |
3365 | &set_thread_cmd_list); |
3366 | add_cmd ("run", no_class, show_thread_run_cmd, | |
1a966eab | 3367 | _("Show whether the current thread is allowed to run."), |
c906108c SS |
3368 | &show_thread_cmd_list); |
3369 | ||
1a966eab AC |
3370 | add_cmd ("detach-suspend-count", class_run, set_thread_detach_sc_cmd, _("\ |
3371 | Set the suspend count will leave on the thread when detaching.\n\ | |
942fd805 | 3372 | Note that this is relative to suspend count when gdb noticed the thread;\n\ |
1a966eab | 3373 | use the `thread takeover-suspend-count' to force it to an absolute value."), |
c906108c | 3374 | &set_thread_cmd_list); |
1a966eab AC |
3375 | add_cmd ("detach-suspend-count", no_class, show_thread_detach_sc_cmd, _("\ |
3376 | Show the suspend count will leave on the thread when detaching.\n\ | |
942fd805 | 3377 | Note that this is relative to suspend count when gdb noticed the thread;\n\ |
1a966eab | 3378 | use the `thread takeover-suspend-count' to force it to an absolute value."), |
c906108c SS |
3379 | &show_thread_cmd_list); |
3380 | ||
1a966eab AC |
3381 | add_cmd ("exception-port", no_class, set_thread_exc_port_cmd, _("\ |
3382 | Set the thread exception port to which we forward exceptions.\n\ | |
942fd805 | 3383 | This overrides the task exception port.\n\ |
1a966eab | 3384 | The argument should be the value of the send right in the task."), |
c906108c SS |
3385 | &set_thread_cmd_list); |
3386 | add_alias_cmd ("excp", "exception-port", no_class, 1, &set_thread_cmd_list); | |
942fd805 MK |
3387 | add_alias_cmd ("exc-port", "exception-port", no_class, 1, |
3388 | &set_thread_cmd_list); | |
c906108c | 3389 | |
1a966eab AC |
3390 | add_cmd ("takeover-suspend-count", no_class, thread_takeover_sc_cmd, _("\ |
3391 | Force the threads absolute suspend-count to be gdb's.\n\ | |
942fd805 | 3392 | Prior to giving this command, gdb's thread suspend-counts are relative\n\ |
1a966eab | 3393 | to the thread's initial suspend-count when gdb notices the threads."), |
c906108c SS |
3394 | &thread_cmd_list); |
3395 | } | |
942fd805 | 3396 | |
c906108c SS |
3397 | \f |
3398 | void | |
942fd805 | 3399 | _initialize_gnu_nat (void) |
c906108c SS |
3400 | { |
3401 | proc_server = getproc (); | |
942fd805 | 3402 | |
c5aa993b | 3403 | init_gnu_ops (); |
c906108c | 3404 | add_target (&gnu_ops); |
942fd805 | 3405 | |
c906108c SS |
3406 | add_task_commands (); |
3407 | add_thread_commands (); | |
b66df561 AC |
3408 | deprecated_add_set_cmd ("gnu-debug", class_maintenance, |
3409 | var_boolean, (char *) &gnu_debug_flag, | |
3410 | "Set debugging output for the gnu backend.", | |
3411 | &maintenancelist); | |
c906108c SS |
3412 | } |
3413 | \f | |
3414 | #ifdef FLUSH_INFERIOR_CACHE | |
3415 | ||
3416 | /* When over-writing code on some machines the I-Cache must be flushed | |
3417 | explicitly, because it is not kept coherent by the lazy hardware. | |
3418 | This definitely includes breakpoints, for instance, or else we | |
3419 | end up looping in mysterious Bpt traps */ | |
3420 | ||
3421 | void | |
fba45db2 | 3422 | flush_inferior_icache (CORE_ADDR pc, int amount) |
c906108c SS |
3423 | { |
3424 | vm_machine_attribute_val_t flush = MATTR_VAL_ICACHE_FLUSH; | |
c5aa993b JM |
3425 | error_t ret; |
3426 | ||
c289427b | 3427 | ret = vm_machine_attribute (gnu_current_inf->task->port, |
c906108c SS |
3428 | pc, |
3429 | amount, | |
3430 | MATTR_CACHE, | |
3431 | &flush); | |
3432 | if (ret != KERN_SUCCESS) | |
8a3fe4f8 | 3433 | warning (_("Error flushing inferior's cache : %s"), safe_strerror (ret)); |
c906108c | 3434 | } |
c5aa993b | 3435 | #endif /* FLUSH_INFERIOR_CACHE */ |