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ce0787ef | 1 | /* Interface GDB to the GNU Hurd |
2847920a | 2 | Copyright (C) 1992, 1995, 1996, 1997 Free Software Foundation, Inc. |
ce0787ef FF |
3 | |
4 | This file is part of GDB. | |
5 | ||
6 | Written by Miles Bader <miles@gnu.ai.mit.edu> | |
7 | ||
8 | Some code and ideas from m3-nat.c by Jukka Virtanen <jtv@hut.fi> | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program; if not, write to the Free Software | |
22 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
23 | */ | |
24 | ||
25 | #include <stdio.h> | |
26 | #include <errno.h> | |
27 | #include <signal.h> | |
28 | #include <assert.h> | |
29 | #include <setjmp.h> | |
30 | #include <limits.h> | |
31 | #include <sys/ptrace.h> | |
32 | ||
33 | /* We include this because we don't need the access macros and they conflict | |
34 | with gdb's definitions (ick). This is very non standard! */ | |
35 | #include <waitflags.h> | |
36 | ||
37 | #include <mach.h> | |
38 | #include <mach/message.h> | |
39 | #include <mach/notify.h> | |
40 | #include <mach_error.h> | |
41 | #include <mach/exception.h> | |
42 | #include <mach/vm_attributes.h> | |
43 | ||
44 | #include <hurd/process.h> | |
45 | #include <hurd/process_request.h> | |
46 | #include <hurd/msg.h> | |
47 | #include <hurd/msg_request.h> | |
48 | #include <hurd/signal.h> | |
49 | #include <hurd/interrupt.h> | |
50 | #include <hurd/sigpreempt.h> | |
51 | ||
647e52ea SG |
52 | #include <portinfo.h> |
53 | ||
ce0787ef FF |
54 | #include "defs.h" |
55 | #include "inferior.h" | |
56 | #include "symtab.h" | |
57 | #include "value.h" | |
58 | #include "language.h" | |
59 | #include "target.h" | |
60 | #include "wait.h" | |
61 | #include "gdbcmd.h" | |
62 | #include "gdbcore.h" | |
63 | ||
64 | #include "gnu-nat.h" | |
65 | ||
66 | #include "exc_request_S.h" | |
67 | #include "notify_S.h" | |
68 | #include "process_reply_S.h" | |
69 | #include "msg_reply_S.h" | |
ce0787ef FF |
70 | #include "exc_request_U.h" |
71 | #include "msg_U.h" | |
72 | ||
73 | static process_t proc_server = MACH_PORT_NULL; | |
74 | ||
75 | /* If we've sent a proc_wait_request to the proc server, the pid of the | |
76 | process we asked about. We can only ever have one outstanding. */ | |
77 | int proc_wait_pid = 0; | |
78 | ||
79 | /* The number of wait requests we've sent, and expect replies from. */ | |
80 | int proc_waits_pending = 0; | |
81 | ||
82 | int gnu_debug_flag = 0; | |
83 | ||
84 | /* Forward decls */ | |
85 | ||
86 | extern struct target_ops gnu_ops; | |
c889a1eb | 87 | extern char *strerror(); |
ce0787ef | 88 | |
ce0787ef | 89 | int inf_update_procs (struct inf *inf); |
2847920a MS |
90 | struct inf *make_inf (); |
91 | void inf_clear_wait (struct inf *inf); | |
92 | void inf_cleanup (struct inf *inf); | |
93 | void inf_startup (struct inf *inf, int pid); | |
94 | int inf_update_suspends (struct inf *inf); | |
95 | void inf_set_pid (struct inf *inf, pid_t pid); | |
96 | void inf_validate_procs (struct inf *inf); | |
97 | void inf_steal_exc_ports (struct inf *inf); | |
98 | void inf_restore_exc_ports (struct inf *inf); | |
99 | struct proc *inf_tid_to_proc (struct inf *inf, int tid); | |
100 | inline void inf_set_threads_resume_sc (struct inf *inf, | |
101 | struct proc *run_thread, | |
102 | int run_others); | |
103 | inline int inf_set_threads_resume_sc_for_signal_thread (struct inf *inf); | |
104 | inline void inf_suspend (struct inf *inf); | |
105 | inline void inf_resume (struct inf *inf); | |
106 | void inf_set_step_thread (struct inf *inf, struct proc *proc); | |
107 | void inf_detach (struct inf *inf); | |
108 | void inf_attach (struct inf *inf, int pid); | |
109 | void inf_signal (struct inf *inf, enum target_signal sig); | |
ce0787ef FF |
110 | |
111 | #define inf_debug(_inf, msg, args...) \ | |
112 | do { struct inf *__inf = (_inf); \ | |
113 | debug ("{inf %d %p}: " msg, __inf->pid, __inf , ##args); } while (0) | |
114 | ||
ce0787ef FF |
115 | void proc_abort (struct proc *proc, int force); |
116 | thread_state_t proc_get_state (struct proc *proc, int force); | |
2847920a MS |
117 | struct proc *make_proc (struct inf *inf, mach_port_t port, int tid); |
118 | struct proc *_proc_free (struct proc *proc); | |
119 | int proc_update_sc (struct proc *proc); | |
120 | error_t proc_get_exception_port (struct proc *proc, mach_port_t *port); | |
121 | error_t proc_set_exception_port (struct proc *proc, mach_port_t port); | |
ce0787ef | 122 | static mach_port_t _proc_get_exc_port (struct proc *proc); |
2847920a MS |
123 | void proc_steal_exc_port (struct proc *proc, mach_port_t exc_port); |
124 | void proc_restore_exc_port (struct proc *proc); | |
125 | int proc_trace (struct proc *proc, int set); | |
ce0787ef FF |
126 | char *proc_string (struct proc *proc); |
127 | ||
128 | /* Evaluate RPC_EXPR in a scope with the variables MSGPORT and REFPORT bound | |
129 | to INF's msg port and task port respectively. If it has no msg port, | |
130 | EIEIO is returned. INF must refer to a running process! */ | |
131 | #define INF_MSGPORT_RPC(inf, rpc_expr) \ | |
132 | HURD_MSGPORT_RPC (proc_getmsgport (proc_server, inf->pid, &msgport), \ | |
133 | (refport = inf->task->port, 0), 0, \ | |
134 | msgport ? (rpc_expr) : EIEIO) | |
135 | ||
136 | /* Like INF_MSGPORT_RPC, but will also resume the signal thread to ensure | |
137 | there's someone around to deal with the RPC (and resuspend things | |
138 | afterwards). This effects INF's threads' resume_sc count. */ | |
139 | #define INF_RESUME_MSGPORT_RPC(inf, rpc_expr) \ | |
140 | (inf_set_threads_resume_sc_for_signal_thread (inf) \ | |
141 | ? ({ error_t __e; \ | |
142 | inf_resume (inf); \ | |
143 | __e = INF_MSGPORT_RPC (inf, rpc_expr); \ | |
144 | inf_suspend (inf); \ | |
145 | __e; }) \ | |
146 | : EIEIO) | |
147 | ||
148 | #define MIG_SERVER_DIED EMIG_SERVER_DIED /* XXX */ | |
149 | \f | |
150 | /* The state passed by an exception message. */ | |
151 | struct exc_state | |
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 | }; | |
158 | ||
159 | /* The results of the last wait an inf did. */ | |
160 | struct inf_wait | |
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 | }; | |
167 | ||
168 | /* The state of an inferior. */ | |
169 | struct inf | |
170 | { | |
171 | /* Fields describing the current inferior. */ | |
172 | ||
173 | struct proc *task; /* The mach task. */ | |
174 | struct proc *threads; /* A linked list of all threads in TASK. */ | |
175 | ||
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; | |
181 | ||
182 | pid_t pid; /* The real system PID. */ | |
183 | ||
184 | struct inf_wait wait; /* What to return from target_wait. */ | |
185 | ||
186 | /* One thread proc in INF may be in `single-stepping mode'. This is it. */ | |
187 | struct proc *step_thread; | |
188 | ||
189 | /* The thread we think is the signal thread. */ | |
190 | struct proc *signal_thread; | |
191 | ||
192 | mach_port_t event_port; /* Where we receive various msgs. */ | |
193 | ||
194 | /* True if we think at least one thread in the inferior could currently be | |
195 | running. */ | |
196 | int running : 1; | |
197 | ||
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 | int stopped : 1; | |
202 | ||
203 | /* True if the inferior is traced. */ | |
204 | int traced : 1; | |
205 | ||
206 | /* True if we shouldn't try waiting for the inferior, usually because we | |
207 | can't for some reason. */ | |
208 | int no_wait : 1; | |
209 | ||
210 | /* When starting a new inferior, we don't try to validate threads until all | |
211 | the proper execs have been done. This is a count of how many execs we | |
212 | expect to happen. */ | |
213 | unsigned pending_execs; | |
214 | ||
215 | /* Fields describing global state */ | |
216 | ||
217 | /* The task suspend count used when gdb has control. This is normally 1 to | |
218 | make things easier for us, but sometimes (like when attaching to vital | |
219 | system servers) it may be desirable to let the task continue to run | |
220 | (pausing individual threads as necessary). */ | |
221 | int pause_sc; | |
222 | ||
647e52ea SG |
223 | /* The task suspend count left when detaching from a task. */ |
224 | int detach_sc; | |
225 | ||
ce0787ef FF |
226 | /* The initial values used for the run_sc and pause_sc of newly discovered |
227 | threads -- see the definition of those fields in struct proc. */ | |
228 | int default_thread_run_sc; | |
229 | int default_thread_pause_sc; | |
647e52ea | 230 | int default_thread_detach_sc; |
ce0787ef FF |
231 | |
232 | /* True if the process should be traced when started/attached. Newly | |
233 | started processes *must* be traced at first to exec them properly, but | |
234 | if this is false, tracing is turned off as soon it has done so. */ | |
235 | int want_signals; | |
236 | ||
237 | /* True if exceptions from the inferior process should be trapped. This | |
238 | must be on to use breakpoints. */ | |
239 | int want_exceptions; | |
240 | }; | |
241 | ||
c889a1eb | 242 | |
ce0787ef FF |
243 | int __proc_pid (struct proc *proc) |
244 | { | |
245 | return proc->inf->pid; | |
246 | } | |
247 | \f | |
248 | /* Update PROC's real suspend count to match it's desired one. Returns true | |
249 | if we think PROC is now in a runnable state. */ | |
2847920a | 250 | int |
ce0787ef FF |
251 | proc_update_sc (struct proc *proc) |
252 | { | |
253 | int running; | |
254 | int err = 0; | |
255 | int delta = proc->sc - proc->cur_sc; | |
256 | ||
257 | if (delta) | |
258 | proc_debug (proc, "sc: %d --> %d", proc->cur_sc, proc->sc); | |
259 | ||
260 | if (proc->sc == 0 && proc->state_changed) | |
261 | /* Since PROC may start running, we must write back any state changes. */ | |
262 | { | |
263 | assert (proc_is_thread (proc)); | |
264 | proc_debug (proc, "storing back changed thread state"); | |
265 | err = thread_set_state (proc->port, THREAD_STATE_FLAVOR, | |
647e52ea | 266 | (thread_state_t)&proc->state, THREAD_STATE_SIZE); |
ce0787ef FF |
267 | if (! err) |
268 | proc->state_changed = 0; | |
269 | } | |
270 | ||
271 | if (delta > 0) | |
272 | while (delta-- > 0 && !err) | |
273 | if (proc_is_task (proc)) | |
274 | err = task_suspend (proc->port); | |
275 | else | |
276 | err = thread_suspend (proc->port); | |
277 | else | |
278 | while (delta++ < 0 && !err) | |
279 | if (proc_is_task (proc)) | |
280 | err = task_resume (proc->port); | |
281 | else | |
282 | err = thread_resume (proc->port); | |
283 | ||
284 | if (! err) | |
285 | proc->cur_sc = proc->sc; | |
286 | ||
287 | /* If we got an error, then the task/thread has disappeared. */ | |
288 | running = !err && proc->sc == 0; | |
289 | ||
290 | proc_debug (proc, "is %s", err ? "dead" : running ? "running" : "suspended"); | |
291 | if (err) | |
292 | proc_debug (proc, "err = %s", strerror (err)); | |
293 | ||
294 | if (running) | |
295 | { | |
296 | proc->aborted = 0; | |
297 | proc->state_valid = proc->state_changed = 0; | |
298 | proc->fetched_regs = 0; | |
299 | } | |
300 | ||
301 | return running; | |
302 | } | |
303 | \f | |
304 | /* Thread_abort is called on PROC if needed. PROC must be a thread proc. | |
305 | If PROC is deemed `precious', then nothing is done unless FORCE is true. | |
306 | In particular, a thread is precious if it's running (in which case forcing | |
307 | it includes suspending it first), or if it has an exception pending. */ | |
308 | void | |
309 | proc_abort (struct proc *proc, int force) | |
310 | { | |
311 | assert (proc_is_thread (proc)); | |
312 | ||
313 | if (! proc->aborted) | |
314 | { | |
315 | struct inf *inf = proc->inf; | |
316 | int running = (proc->cur_sc == 0 && inf->task->cur_sc == 0); | |
317 | ||
318 | if (running && force) | |
319 | { | |
320 | proc->sc = 1; | |
321 | inf_update_suspends (proc->inf); | |
322 | running = 0; | |
323 | warning ("Stopped %s.", proc_string (proc)); | |
324 | } | |
325 | else if (proc == inf->wait.thread && inf->wait.exc.reply && !force) | |
326 | /* An exception is pending on PROC, which don't mess with. */ | |
327 | running = 1; | |
328 | ||
329 | if (! running) | |
330 | /* We only abort the thread if it's not actually running. */ | |
331 | { | |
332 | thread_abort (proc->port); | |
333 | proc_debug (proc, "aborted"); | |
334 | proc->aborted = 1; | |
335 | } | |
336 | else | |
337 | proc_debug (proc, "not aborting"); | |
338 | } | |
339 | } | |
340 | ||
341 | /* Make sure that the state field in PROC is up to date, and return a pointer | |
342 | to it, or 0 if something is wrong. If WILL_MODIFY is true, makes sure | |
343 | that the thread is stopped and aborted first, and sets the state_changed | |
344 | field in PROC to true. */ | |
345 | thread_state_t | |
346 | proc_get_state (struct proc *proc, int will_modify) | |
347 | { | |
348 | int was_aborted = proc->aborted; | |
349 | ||
350 | proc_debug (proc, "updating state info%s", | |
351 | will_modify ? " (with intention to modify)" : ""); | |
352 | ||
353 | proc_abort (proc, will_modify); | |
354 | ||
355 | if (! was_aborted && proc->aborted) | |
356 | /* PROC's state may have changed since we last fetched it. */ | |
357 | proc->state_valid = 0; | |
358 | ||
359 | if (! proc->state_valid) | |
360 | { | |
361 | mach_msg_type_number_t state_size = THREAD_STATE_SIZE; | |
362 | error_t err = | |
363 | thread_get_state (proc->port, THREAD_STATE_FLAVOR, | |
647e52ea | 364 | (thread_state_t)&proc->state, &state_size); |
ce0787ef FF |
365 | proc_debug (proc, "getting thread state"); |
366 | proc->state_valid = !err; | |
367 | } | |
368 | ||
369 | if (proc->state_valid) | |
370 | { | |
371 | if (will_modify) | |
372 | proc->state_changed = 1; | |
647e52ea | 373 | return (thread_state_t)&proc->state; |
ce0787ef FF |
374 | } |
375 | else | |
376 | return 0; | |
377 | } | |
378 | \f | |
c889a1eb | 379 | /* Set PORT to PROC's exception port. */ |
2847920a | 380 | error_t |
ce0787ef FF |
381 | proc_get_exception_port (struct proc *proc, mach_port_t *port) |
382 | { | |
383 | if (proc_is_task (proc)) | |
384 | return task_get_exception_port (proc->port, port); | |
385 | else | |
386 | return thread_get_exception_port (proc->port, port); | |
387 | } | |
388 | ||
c889a1eb | 389 | /* Set PROC's exception port to PORT. */ |
2847920a | 390 | error_t |
ce0787ef FF |
391 | proc_set_exception_port (struct proc *proc, mach_port_t port) |
392 | { | |
393 | proc_debug (proc, "setting exception port: %d", port); | |
394 | if (proc_is_task (proc)) | |
395 | return task_set_exception_port (proc->port, port); | |
396 | else | |
397 | return thread_set_exception_port (proc->port, port); | |
398 | } | |
399 | ||
400 | /* Get PROC's exception port, cleaning up a bit if proc has died. */ | |
401 | static mach_port_t | |
402 | _proc_get_exc_port (struct proc *proc) | |
403 | { | |
404 | mach_port_t exc_port; | |
405 | error_t err = proc_get_exception_port (proc, &exc_port); | |
406 | ||
407 | if (err) | |
408 | /* PROC must be dead. */ | |
409 | { | |
410 | if (proc->exc_port) | |
411 | mach_port_deallocate (mach_task_self (), proc->exc_port); | |
412 | proc->exc_port = MACH_PORT_NULL; | |
413 | if (proc->saved_exc_port) | |
414 | mach_port_deallocate (mach_task_self (), proc->saved_exc_port); | |
415 | proc->saved_exc_port = MACH_PORT_NULL; | |
416 | } | |
417 | ||
418 | return exc_port; | |
419 | } | |
420 | ||
421 | /* Replace PROC's exception port with EXC_PORT, unless it's already been | |
422 | done. Stash away any existing exception port so we can restore it later. */ | |
2847920a | 423 | void |
ce0787ef FF |
424 | proc_steal_exc_port (struct proc *proc, mach_port_t exc_port) |
425 | { | |
426 | mach_port_t cur_exc_port = _proc_get_exc_port (proc); | |
427 | ||
428 | if (cur_exc_port) | |
429 | { | |
430 | error_t err; | |
431 | ||
432 | proc_debug (proc, "inserting exception port: %d", exc_port); | |
433 | ||
434 | if (cur_exc_port != exc_port) | |
435 | /* Put in our exception port. */ | |
436 | err = proc_set_exception_port (proc, exc_port); | |
437 | ||
438 | if (err || cur_exc_port == proc->exc_port) | |
439 | /* We previously set the exception port, and it's still set. So we | |
440 | just keep the old saved port which is what the proc set. */ | |
441 | { | |
442 | if (cur_exc_port) | |
443 | mach_port_deallocate (mach_task_self (), cur_exc_port); | |
444 | } | |
445 | else | |
446 | /* Keep a copy of PROC's old exception port so it can be restored. */ | |
447 | { | |
448 | if (proc->saved_exc_port) | |
449 | mach_port_deallocate (mach_task_self (), proc->saved_exc_port); | |
450 | proc->saved_exc_port = cur_exc_port; | |
451 | } | |
452 | ||
453 | proc_debug (proc, "saved exception port: %d", proc->saved_exc_port); | |
454 | ||
455 | if (!err) | |
456 | proc->exc_port = exc_port; | |
457 | else | |
458 | warning ("Error setting exception port for %s: %s", | |
459 | proc_string (proc), strerror (err)); | |
460 | } | |
461 | } | |
462 | ||
c889a1eb MS |
463 | /* If we previously replaced PROC's exception port, put back what we |
464 | found there at the time, unless *our* exception port has since been | |
465 | overwritten, in which case who knows what's going on. */ | |
2847920a | 466 | void |
ce0787ef FF |
467 | proc_restore_exc_port (struct proc *proc) |
468 | { | |
469 | mach_port_t cur_exc_port = _proc_get_exc_port (proc); | |
470 | ||
471 | if (cur_exc_port) | |
472 | { | |
473 | error_t err = 0; | |
474 | ||
475 | proc_debug (proc, "restoring real exception port"); | |
476 | ||
477 | if (proc->exc_port == cur_exc_port) | |
478 | /* Our's is still there. */ | |
479 | err = proc_set_exception_port (proc, proc->saved_exc_port); | |
480 | ||
481 | if (proc->saved_exc_port) | |
482 | mach_port_deallocate (mach_task_self (), proc->saved_exc_port); | |
483 | proc->saved_exc_port = MACH_PORT_NULL; | |
484 | ||
485 | if (!err) | |
486 | proc->exc_port = MACH_PORT_NULL; | |
487 | else | |
488 | warning ("Error setting exception port for %s: %s", | |
489 | proc_string (proc), strerror (err)); | |
490 | } | |
491 | } | |
492 | \f | |
c889a1eb | 493 | /* Turns hardware tracing in PROC on or off when SET is true or false, |
ce0787ef | 494 | respectively. Returns true on success. */ |
2847920a | 495 | int |
ce0787ef FF |
496 | proc_trace (struct proc *proc, int set) |
497 | { | |
498 | thread_state_t state = proc_get_state (proc, 1); | |
499 | ||
500 | if (! state) | |
501 | return 0; /* the thread must be dead. */ | |
502 | ||
503 | proc_debug (proc, "tracing %s", set ? "on" : "off"); | |
504 | ||
505 | if (set) | |
506 | { | |
507 | /* XXX We don't get the exception unless the thread has its own | |
508 | exception port???? */ | |
509 | if (proc->exc_port == MACH_PORT_NULL) | |
510 | proc_steal_exc_port (proc, proc->inf->event_port); | |
511 | THREAD_STATE_SET_TRACED (state); | |
512 | } | |
513 | else | |
514 | THREAD_STATE_CLEAR_TRACED (state); | |
515 | ||
516 | return 1; | |
517 | } | |
518 | \f | |
519 | /* A variable from which to assign new TIDs. */ | |
520 | static int next_thread_id = 1; | |
521 | ||
522 | /* Returns a new proc structure with the given fields. Also adds a | |
523 | notification for PORT becoming dead to be sent to INF's notify port. */ | |
524 | struct proc * | |
525 | make_proc (struct inf *inf, mach_port_t port, int tid) | |
526 | { | |
527 | error_t err; | |
528 | mach_port_t prev_port = MACH_PORT_NULL; | |
529 | struct proc *proc = malloc (sizeof (struct proc)); | |
530 | ||
531 | proc->port = port; | |
532 | proc->tid = tid; | |
533 | proc->inf = inf; | |
534 | proc->next = 0; | |
535 | proc->saved_exc_port = MACH_PORT_NULL; | |
536 | proc->exc_port = MACH_PORT_NULL; | |
647e52ea | 537 | |
ce0787ef FF |
538 | proc->sc = 0; |
539 | proc->cur_sc = 0; | |
647e52ea SG |
540 | |
541 | /* Note that these are all the values for threads; the task simply uses the | |
542 | corresponding field in INF directly. */ | |
ce0787ef FF |
543 | proc->run_sc = inf->default_thread_run_sc; |
544 | proc->pause_sc = inf->default_thread_pause_sc; | |
647e52ea | 545 | proc->detach_sc = inf->default_thread_detach_sc; |
ce0787ef | 546 | proc->resume_sc = proc->run_sc; |
647e52ea | 547 | |
ce0787ef | 548 | proc->aborted = 0; |
647e52ea | 549 | proc->dead = 0; |
ce0787ef FF |
550 | proc->state_valid = 0; |
551 | proc->state_changed = 0; | |
552 | ||
553 | proc_debug (proc, "is new"); | |
554 | ||
555 | /* Get notified when things die. */ | |
556 | err = | |
557 | mach_port_request_notification (mach_task_self(), port, | |
558 | MACH_NOTIFY_DEAD_NAME, 1, | |
559 | inf->event_port, | |
560 | MACH_MSG_TYPE_MAKE_SEND_ONCE, | |
561 | &prev_port); | |
562 | if (err) | |
563 | warning ("Couldn't request notification for port %d: %s", | |
564 | port, strerror (err)); | |
565 | else | |
566 | { | |
567 | proc_debug (proc, "notifications to: %d", inf->event_port); | |
568 | if (prev_port != MACH_PORT_NULL) | |
569 | mach_port_deallocate (mach_task_self (), prev_port); | |
570 | } | |
571 | ||
572 | if (inf->want_exceptions) | |
573 | if (proc_is_task (proc)) | |
574 | /* Make the task exception port point to us. */ | |
575 | proc_steal_exc_port (proc, inf->event_port); | |
576 | else | |
577 | /* Just clear thread exception ports -- they default to the task one. */ | |
578 | proc_steal_exc_port (proc, MACH_PORT_NULL); | |
579 | ||
580 | return proc; | |
581 | } | |
582 | ||
c889a1eb MS |
583 | /* Frees PROC and any resources it uses, and returns the value of PROC's |
584 | next field. */ | |
2847920a | 585 | struct proc * |
ce0787ef FF |
586 | _proc_free (struct proc *proc) |
587 | { | |
588 | struct inf *inf = proc->inf; | |
589 | struct proc *next = proc->next; | |
590 | ||
591 | proc_debug (proc, "freeing..."); | |
592 | ||
593 | if (proc == inf->step_thread) | |
594 | /* Turn off single stepping. */ | |
595 | inf_set_step_thread (inf, 0); | |
596 | if (proc == inf->wait.thread) | |
597 | inf_clear_wait (inf); | |
598 | if (proc == inf->signal_thread) | |
599 | inf->signal_thread = 0; | |
600 | ||
601 | if (proc->port != MACH_PORT_NULL) | |
602 | { | |
603 | if (proc->exc_port != MACH_PORT_NULL) | |
604 | /* Restore the original exception port. */ | |
605 | proc_restore_exc_port (proc); | |
606 | if (proc->cur_sc != 0) | |
607 | /* Resume the thread/task. */ | |
608 | { | |
609 | proc->sc = 0; | |
610 | proc_update_sc (proc); | |
611 | } | |
612 | mach_port_deallocate (mach_task_self (), proc->port); | |
613 | } | |
614 | ||
615 | free (proc); | |
616 | return next; | |
617 | } | |
618 | \f | |
619 | struct inf *make_inf () | |
620 | { | |
621 | struct inf *inf = malloc (sizeof (struct inf)); | |
622 | ||
623 | if (!inf) | |
624 | return 0; | |
625 | ||
626 | inf->task = 0; | |
627 | inf->threads = 0; | |
628 | inf->threads_up_to_date = 0; | |
629 | inf->pid = 0; | |
630 | inf->wait.status.kind = TARGET_WAITKIND_SPURIOUS; | |
631 | inf->wait.thread = 0; | |
632 | inf->wait.exc.handler = MACH_PORT_NULL; | |
633 | inf->wait.exc.reply = MACH_PORT_NULL; | |
634 | inf->step_thread = 0; | |
635 | inf->signal_thread = 0; | |
636 | inf->event_port = MACH_PORT_NULL; | |
637 | inf->stopped = 0; | |
638 | inf->running = 0; | |
639 | inf->traced = 0; | |
640 | inf->no_wait = 0; | |
641 | inf->pending_execs = 0; | |
642 | inf->pause_sc = 1; | |
647e52ea | 643 | inf->detach_sc = 0; |
ce0787ef FF |
644 | inf->default_thread_run_sc = 0; |
645 | inf->default_thread_pause_sc = 0; | |
647e52ea | 646 | inf->default_thread_detach_sc = 0; |
ce0787ef FF |
647 | inf->want_signals = 1; /* By default */ |
648 | inf->want_exceptions = 1; /* By default */ | |
649 | ||
650 | return inf; | |
651 | } | |
652 | ||
c889a1eb | 653 | /* clear INF's target wait status. */ |
2847920a | 654 | void |
ce0787ef FF |
655 | inf_clear_wait (struct inf *inf) |
656 | { | |
657 | inf_debug (inf, "clearing wait"); | |
658 | inf->wait.status.kind = TARGET_WAITKIND_SPURIOUS; | |
659 | inf->wait.thread = 0; | |
660 | inf->wait.suppress = 0; | |
661 | if (inf->wait.exc.handler != MACH_PORT_NULL) | |
662 | { | |
663 | mach_port_deallocate (mach_task_self (), inf->wait.exc.handler); | |
664 | inf->wait.exc.handler = MACH_PORT_NULL; | |
665 | } | |
666 | if (inf->wait.exc.reply != MACH_PORT_NULL) | |
667 | { | |
668 | mach_port_deallocate (mach_task_self (), inf->wait.exc.reply); | |
669 | inf->wait.exc.reply = MACH_PORT_NULL; | |
670 | } | |
671 | } | |
672 | \f | |
2847920a | 673 | void |
ce0787ef FF |
674 | inf_cleanup (struct inf *inf) |
675 | { | |
676 | inf_debug (inf, "cleanup"); | |
677 | ||
678 | inf_clear_wait (inf); | |
679 | ||
2847920a | 680 | inf_set_pid (inf, -1); |
ce0787ef FF |
681 | inf->pid = 0; |
682 | inf->traced = 0; | |
683 | inf->no_wait = 0; | |
684 | inf->stopped = 0; | |
685 | inf->running = 0; | |
686 | inf->pending_execs = 0; | |
687 | ||
688 | if (inf->event_port) | |
689 | { | |
690 | mach_port_destroy (mach_task_self (), inf->event_port); | |
691 | inf->event_port = MACH_PORT_NULL; | |
692 | } | |
693 | } | |
694 | ||
2847920a MS |
695 | void |
696 | inf_startup (struct inf *inf, int pid) | |
ce0787ef FF |
697 | { |
698 | error_t err; | |
699 | ||
2847920a | 700 | inf_debug (inf, "startup: pid = %d", pid); |
ce0787ef FF |
701 | |
702 | inf_cleanup (inf); | |
703 | ||
704 | /* Make the port on which we receive all events. */ | |
705 | err = mach_port_allocate (mach_task_self (), | |
706 | MACH_PORT_RIGHT_RECEIVE, &inf->event_port); | |
707 | if (err) | |
708 | error ("Error allocating event port: %s", strerror (err)); | |
709 | ||
710 | /* Make a send right for it, so we can easily copy it for other people. */ | |
711 | mach_port_insert_right (mach_task_self (), inf->event_port, | |
712 | inf->event_port, MACH_MSG_TYPE_MAKE_SEND); | |
2847920a | 713 | inf_set_pid (inf, pid); |
ce0787ef FF |
714 | } |
715 | \f | |
c889a1eb | 716 | /* close current process, if any, and attach INF to process PORT */ |
2847920a MS |
717 | void |
718 | inf_set_pid (struct inf *inf, pid_t pid) | |
ce0787ef | 719 | { |
2847920a | 720 | task_t task_port; |
ce0787ef FF |
721 | struct proc *task = inf->task; |
722 | ||
2847920a | 723 | inf_debug (inf, "setting pid: %d", pid); |
ce0787ef | 724 | |
2847920a MS |
725 | if (pid < 0) |
726 | task_port = MACH_PORT_NULL; | |
727 | else | |
728 | { | |
729 | error_t err = proc_pid2task (proc_server, pid, &task_port); | |
730 | if (err) | |
731 | error ("Error getting task for pid %d: %s", pid, strerror (err)); | |
732 | } | |
733 | ||
734 | inf_debug (inf, "setting task: %d", task_port); | |
735 | ||
736 | if (inf->pause_sc) | |
737 | task_suspend (task_port); | |
738 | ||
739 | if (task && task->port != task_port) | |
ce0787ef FF |
740 | { |
741 | inf->task = 0; | |
742 | inf_validate_procs (inf); /* Trash all the threads. */ | |
743 | _proc_free (task); /* And the task. */ | |
744 | } | |
745 | ||
2847920a | 746 | if (task_port != MACH_PORT_NULL) |
ce0787ef | 747 | { |
2847920a | 748 | inf->task = make_proc (inf, task_port, PROC_TID_TASK); |
ce0787ef FF |
749 | inf->threads_up_to_date = 0; |
750 | } | |
2847920a MS |
751 | |
752 | if (inf->task) | |
753 | { | |
754 | inf->pid = pid; | |
755 | if (inf->pause_sc) | |
756 | inf->task->sc = inf->task->cur_sc = 1; /* Reflect task_suspend above */ | |
757 | } | |
758 | else | |
759 | inf->pid = -1; | |
ce0787ef FF |
760 | } |
761 | \f | |
762 | /* Validates INF's stopped field from the actual proc server state. */ | |
763 | static void | |
764 | inf_validate_stopped (struct inf *inf) | |
765 | { | |
766 | char *noise; | |
767 | mach_msg_type_number_t noise_len = 0; | |
768 | struct procinfo *pi; | |
769 | mach_msg_type_number_t pi_len = 0; | |
647e52ea | 770 | int info_flags = 0; |
ce0787ef | 771 | error_t err = |
647e52ea | 772 | proc_getprocinfo (proc_server, inf->pid, &info_flags, |
ce0787ef FF |
773 | (procinfo_t *)&pi, &pi_len, &noise, &noise_len); |
774 | ||
775 | if (! err) | |
776 | { | |
777 | inf->stopped = !!(pi->state & PI_STOPPED); | |
778 | vm_deallocate (mach_task_self (), (vm_address_t)pi, pi_len); | |
779 | if (noise_len > 0) | |
780 | vm_deallocate (mach_task_self (), (vm_address_t)noise, noise_len); | |
781 | } | |
782 | } | |
783 | ||
647e52ea SG |
784 | /* Validates INF's task suspend count. If it's higher than we expect, verify |
785 | with the user before `stealing' the extra count. */ | |
ce0787ef FF |
786 | static void |
787 | inf_validate_task_sc (struct inf *inf) | |
788 | { | |
789 | struct task_basic_info info; | |
790 | mach_msg_type_number_t info_len = TASK_BASIC_INFO_COUNT; | |
647e52ea SG |
791 | error_t err = |
792 | task_info (inf->task->port, TASK_BASIC_INFO, (task_info_t)&info, &info_len); | |
793 | ||
794 | if (err) | |
795 | inf->task->dead = 1; /* oh well */ | |
796 | else if (inf->task->cur_sc < info.suspend_count) | |
ce0787ef | 797 | { |
647e52ea SG |
798 | int abort; |
799 | ||
800 | target_terminal_ours (); /* Allow I/O. */ | |
801 | abort = | |
802 | !query ("Pid %d has an additional task suspend count of %d; clear it? ", | |
803 | inf->pid, info.suspend_count - inf->task->cur_sc); | |
804 | target_terminal_inferior (); /* Give it back to the child. */ | |
805 | ||
806 | if (abort) | |
807 | error ("Additional task suspend count left untouched."); | |
808 | ||
ce0787ef FF |
809 | inf->task->cur_sc = info.suspend_count; |
810 | } | |
811 | } | |
812 | ||
813 | /* Turns tracing for INF on or off, depending on ON, unless it already is. | |
814 | If INF is running, the resume_sc count of INF's threads will be modified, | |
815 | and the signal thread will briefly be run to change the trace state. */ | |
2847920a | 816 | void |
ce0787ef FF |
817 | inf_set_traced (struct inf *inf, int on) |
818 | { | |
819 | if (on != inf->traced) | |
647e52ea | 820 | if (inf->task && !inf->task->dead) |
ce0787ef FF |
821 | /* Make it take effect immediately. */ |
822 | { | |
647e52ea | 823 | sigset_t mask = on ? ~(sigset_t)0 : 0; |
ce0787ef | 824 | error_t err = |
647e52ea SG |
825 | INF_RESUME_MSGPORT_RPC (inf, msg_set_init_int (msgport, refport, |
826 | INIT_TRACEMASK, mask)); | |
ce0787ef | 827 | if (err == EIEIO) |
647e52ea SG |
828 | { |
829 | if (on) | |
830 | warning ("Can't modify tracing state for pid %d: No signal thread", | |
831 | inf->pid); | |
832 | inf->traced = on; | |
833 | } | |
ce0787ef FF |
834 | else if (err) |
835 | warning ("Can't modify tracing state for pid %d: %s", | |
836 | inf->pid, strerror (err)); | |
837 | else | |
838 | inf->traced = on; | |
839 | } | |
840 | else | |
841 | inf->traced = on; | |
842 | } | |
843 | \f | |
844 | /* Makes all the real suspend count deltas of all the procs in INF match the | |
845 | desired values. Careful to always do thread/task suspend counts in the | |
846 | safe order. Returns true if at least one thread is thought to be running.*/ | |
2847920a | 847 | int |
ce0787ef FF |
848 | inf_update_suspends (struct inf *inf) |
849 | { | |
850 | struct proc *task = inf->task; | |
851 | /* We don't have to update INF->threads even though we're iterating over it | |
852 | because we'll change a thread only if it already has an existing proc | |
853 | entry. */ | |
854 | ||
855 | inf_debug (inf, "updating suspend counts"); | |
856 | ||
857 | if (task) | |
858 | { | |
859 | struct proc *thread; | |
860 | int task_running = (task->sc == 0), thread_running = 0; | |
861 | ||
862 | if (task->sc > task->cur_sc) | |
863 | /* The task is becoming _more_ suspended; do before any threads. */ | |
864 | task_running = proc_update_sc (task); | |
865 | ||
866 | if (inf->pending_execs) | |
867 | /* When we're waiting for an exec, things may be happening behind our | |
868 | back, so be conservative. */ | |
869 | thread_running = 1; | |
870 | ||
871 | /* Do all the thread suspend counts. */ | |
872 | for (thread = inf->threads; thread; thread = thread->next) | |
873 | thread_running |= proc_update_sc (thread); | |
874 | ||
875 | if (task->sc != task->cur_sc) | |
876 | /* We didn't do the task first, because we wanted to wait for the | |
877 | threads; do it now. */ | |
878 | task_running = proc_update_sc (task); | |
879 | ||
880 | inf_debug (inf, "%srunning...", | |
881 | (thread_running && task_running) ? "" : "not "); | |
882 | ||
883 | inf->running = thread_running && task_running; | |
884 | ||
885 | /* Once any thread has executed some code, we can't depend on the | |
886 | threads list any more. */ | |
887 | if (inf->running) | |
888 | inf->threads_up_to_date = 0; | |
889 | ||
890 | return inf->running; | |
891 | } | |
892 | ||
893 | return 0; | |
894 | } | |
895 | \f | |
896 | /* Converts a GDB pid to a struct proc. */ | |
897 | struct proc * | |
898 | inf_tid_to_thread (struct inf *inf, int tid) | |
899 | { | |
900 | struct proc *thread = inf->threads; | |
2847920a | 901 | |
ce0787ef FF |
902 | while (thread) |
903 | if (thread->tid == tid) | |
904 | return thread; | |
905 | else | |
906 | thread = thread->next; | |
907 | return 0; | |
908 | } | |
909 | ||
910 | /* Converts a thread port to a struct proc. */ | |
2847920a | 911 | struct proc * |
ce0787ef FF |
912 | inf_port_to_thread (struct inf *inf, mach_port_t port) |
913 | { | |
914 | struct proc *thread = inf->threads; | |
915 | while (thread) | |
916 | if (thread->port == port) | |
917 | return thread; | |
918 | else | |
919 | thread = thread->next; | |
920 | return 0; | |
921 | } | |
922 | \f | |
923 | /* Make INF's list of threads be consistent with reality of TASK. */ | |
2847920a | 924 | void |
ce0787ef FF |
925 | inf_validate_procs (struct inf *inf) |
926 | { | |
927 | int i; | |
928 | thread_array_t threads; | |
929 | unsigned num_threads; | |
930 | struct proc *task = inf->task; | |
931 | ||
647e52ea SG |
932 | /* If no threads are currently running, this function will guarantee that |
933 | things are up to date. The exception is if there are zero threads -- | |
934 | then it is almost certainly in an odd state, and probably some outside | |
935 | agent will create threads. */ | |
936 | inf->threads_up_to_date = inf->threads ? !inf->running : 0; | |
ce0787ef FF |
937 | |
938 | if (task) | |
939 | { | |
940 | error_t err = task_threads (task->port, &threads, &num_threads); | |
941 | inf_debug (inf, "fetching threads"); | |
942 | if (err) | |
943 | /* TASK must be dead. */ | |
944 | { | |
647e52ea SG |
945 | task->dead = 1; |
946 | task = 0; | |
ce0787ef FF |
947 | } |
948 | } | |
949 | ||
950 | if (!task) | |
951 | { | |
952 | num_threads = 0; | |
953 | inf_debug (inf, "no task"); | |
954 | } | |
955 | ||
956 | { | |
957 | unsigned search_start = 0; /* Make things normally linear. */ | |
958 | /* Which thread in PROCS corresponds to each task thread, & the task. */ | |
959 | struct proc *matched[num_threads + 1]; | |
960 | /* The last thread in INF->threads, so we can add to the end. */ | |
961 | struct proc *last = 0; | |
962 | /* The current thread we're considering. */ | |
963 | struct proc *thread = inf->threads; | |
964 | ||
965 | bzero (matched, sizeof (matched)); | |
966 | ||
967 | while (thread) | |
968 | { | |
969 | unsigned left; | |
970 | ||
971 | for (i = search_start, left = num_threads; left; i++, left--) | |
972 | { | |
973 | if (i >= num_threads) | |
974 | i -= num_threads; /* I wrapped around. */ | |
975 | if (thread->port == threads[i]) | |
976 | /* We already know about this thread. */ | |
977 | { | |
978 | matched[i] = thread; | |
979 | last = thread; | |
980 | thread = thread->next; | |
981 | search_start++; | |
982 | break; | |
983 | } | |
984 | } | |
985 | ||
986 | if (! left) | |
987 | { | |
988 | proc_debug (thread, "died!"); | |
989 | thread->port = MACH_PORT_NULL; | |
990 | thread = _proc_free (thread); /* THREAD is dead. */ | |
991 | (last ? last->next : inf->threads) = thread; | |
992 | } | |
993 | } | |
994 | ||
995 | for (i = 0; i < num_threads; i++) | |
996 | if (matched[i]) | |
997 | /* Throw away the duplicate send right. */ | |
998 | mach_port_deallocate (mach_task_self (), threads[i]); | |
999 | else | |
1000 | /* THREADS[I] is a thread we don't know about yet! */ | |
1001 | { | |
1002 | thread = make_proc (inf, threads[i], next_thread_id++); | |
1003 | (last ? last->next : inf->threads) = thread; | |
1004 | last = thread; | |
1005 | proc_debug (thread, "new thread: %d", threads[i]); | |
1006 | add_thread (thread->tid); /* Tell GDB's generic thread code. */ | |
1007 | } | |
1008 | ||
1009 | vm_deallocate(mach_task_self(), | |
1010 | (vm_address_t)threads, (num_threads * sizeof(thread_t))); | |
1011 | } | |
1012 | } | |
1013 | \f | |
1014 | /* Makes sure that INF's thread list is synced with the actual process. */ | |
1015 | inline int | |
1016 | inf_update_procs (struct inf *inf) | |
1017 | { | |
1018 | if (! inf->task) | |
1019 | return 0; | |
1020 | if (! inf->threads_up_to_date) | |
1021 | inf_validate_procs (inf); | |
1022 | return !!inf->task; | |
1023 | } | |
1024 | ||
1025 | /* Sets the resume_sc of each thread in inf. That of RUN_THREAD is set to 0, | |
1026 | and others are set to their run_sc if RUN_OTHERS is true, and otherwise | |
1027 | their pause_sc. */ | |
2847920a | 1028 | inline void |
ce0787ef FF |
1029 | inf_set_threads_resume_sc (struct inf *inf, |
1030 | struct proc *run_thread, int run_others) | |
1031 | { | |
1032 | struct proc *thread; | |
1033 | inf_update_procs (inf); | |
1034 | for (thread = inf->threads; thread; thread = thread->next) | |
1035 | if (thread == run_thread) | |
1036 | thread->resume_sc = 0; | |
1037 | else if (run_others) | |
1038 | thread->resume_sc = thread->run_sc; | |
1039 | else | |
1040 | thread->resume_sc = thread->pause_sc; | |
1041 | } | |
1042 | \f | |
1043 | /* Cause INF to continue execution immediately; individual threads may still | |
1044 | be suspended (but their suspend counts will be updated). */ | |
2847920a | 1045 | inline void |
ce0787ef FF |
1046 | inf_resume (struct inf *inf) |
1047 | { | |
1048 | struct proc *thread; | |
1049 | ||
1050 | inf_update_procs (inf); | |
1051 | ||
1052 | for (thread = inf->threads; thread; thread = thread->next) | |
1053 | thread->sc = thread->resume_sc; | |
1054 | ||
1055 | if (inf->task) | |
647e52ea SG |
1056 | { |
1057 | if (! inf->pending_execs) | |
1058 | /* Try to make sure our task count is correct -- in the case where | |
1059 | we're waiting for an exec though, things are too volatile, so just | |
1060 | assume things will be reasonable (which they usually will be). */ | |
1061 | inf_validate_task_sc (inf); | |
1062 | inf->task->sc = 0; | |
1063 | } | |
ce0787ef FF |
1064 | |
1065 | inf_update_suspends (inf); | |
1066 | } | |
1067 | ||
1068 | /* Cause INF to stop execution immediately; individual threads may still | |
1069 | be running. */ | |
2847920a | 1070 | inline void |
ce0787ef FF |
1071 | inf_suspend (struct inf *inf) |
1072 | { | |
1073 | struct proc *thread; | |
1074 | ||
1075 | inf_update_procs (inf); | |
1076 | ||
1077 | for (thread = inf->threads; thread; thread = thread->next) | |
1078 | thread->sc = thread->pause_sc; | |
1079 | ||
1080 | if (inf->task) | |
1081 | inf->task->sc = inf->pause_sc; | |
1082 | ||
1083 | inf_update_suspends (inf); | |
1084 | } | |
1085 | \f | |
c889a1eb | 1086 | /* INF has one thread PROC that is in single-stepping mode. This function |
ce0787ef | 1087 | changes it to be PROC, changing any old step_thread to be a normal one. A |
c889a1eb | 1088 | PROC of 0 clears any existing value. */ |
2847920a | 1089 | void |
ce0787ef FF |
1090 | inf_set_step_thread (struct inf *inf, struct proc *thread) |
1091 | { | |
1092 | assert (!thread || proc_is_thread (thread)); | |
1093 | ||
1094 | if (thread) | |
1095 | inf_debug (inf, "setting step thread: %d/%d", inf->pid, thread->tid); | |
1096 | else | |
1097 | inf_debug (inf, "clearing step thread"); | |
1098 | ||
1099 | if (inf->step_thread != thread) | |
1100 | { | |
1101 | if (inf->step_thread && inf->step_thread->port != MACH_PORT_NULL) | |
1102 | if (! proc_trace (inf->step_thread, 0)) | |
1103 | return; | |
1104 | if (thread && proc_trace (thread, 1)) | |
1105 | inf->step_thread = thread; | |
1106 | else | |
1107 | inf->step_thread = 0; | |
1108 | } | |
1109 | } | |
1110 | \f | |
1111 | /* Set up the thread resume_sc's so that only the signal thread is running | |
1112 | (plus whatever other thread are set to always run). Returns true if we | |
1113 | did so, or false if we can't find a signal thread. */ | |
2847920a | 1114 | inline int |
ce0787ef FF |
1115 | inf_set_threads_resume_sc_for_signal_thread (struct inf *inf) |
1116 | { | |
1117 | if (inf->signal_thread) | |
1118 | { | |
1119 | inf_set_threads_resume_sc (inf, inf->signal_thread, 0); | |
1120 | return 1; | |
1121 | } | |
1122 | else | |
1123 | return 0; | |
1124 | } | |
1125 | ||
1126 | static void | |
1127 | inf_update_signal_thread (struct inf *inf) | |
1128 | { | |
1129 | /* XXX for now we assume that if there's a msgport, the 2nd thread is | |
1130 | the signal thread. */ | |
1131 | inf->signal_thread = inf->threads ? inf->threads->next : 0; | |
1132 | } | |
1133 | \f | |
1134 | /* Detachs from INF's inferior task, letting it run once again... */ | |
2847920a | 1135 | void |
ce0787ef FF |
1136 | inf_detach (struct inf *inf) |
1137 | { | |
1138 | struct proc *task = inf->task; | |
1139 | ||
1140 | inf_debug (inf, "detaching..."); | |
1141 | ||
1142 | inf_clear_wait (inf); | |
1143 | inf_set_step_thread (inf, 0); | |
1144 | ||
1145 | if (task) | |
1146 | { | |
1147 | struct proc *thread; | |
1148 | ||
1149 | inf_set_traced (inf, 0); | |
1150 | if (inf->stopped) | |
1151 | inf_signal (inf, TARGET_SIGNAL_0); | |
1152 | ||
1153 | proc_restore_exc_port (task); | |
647e52ea | 1154 | task->sc = inf->detach_sc; |
ce0787ef FF |
1155 | |
1156 | for (thread = inf->threads; thread; thread = thread->next) | |
1157 | { | |
1158 | proc_restore_exc_port (thread); | |
647e52ea | 1159 | thread->sc = thread->detach_sc; |
ce0787ef FF |
1160 | } |
1161 | ||
1162 | inf_update_suspends (inf); | |
1163 | } | |
1164 | ||
1165 | inf_cleanup (inf); | |
1166 | } | |
1167 | ||
1168 | /* Attaches INF to the process with process id PID, returning it in a suspended | |
1169 | state suitable for debugging. */ | |
2847920a | 1170 | void |
ce0787ef FF |
1171 | inf_attach (struct inf *inf, int pid) |
1172 | { | |
ce0787ef FF |
1173 | inf_debug (inf, "attaching: %d", pid); |
1174 | ||
ce0787ef FF |
1175 | if (inf->pid) |
1176 | inf_detach (inf); | |
1177 | ||
2847920a | 1178 | inf_startup (inf, pid); |
ce0787ef FF |
1179 | } |
1180 | \f | |
1181 | /* Makes sure that we've got our exception ports entrenched in the process. */ | |
1182 | void inf_steal_exc_ports (struct inf *inf) | |
1183 | { | |
1184 | struct proc *thread; | |
1185 | ||
1186 | inf_debug (inf, "stealing exception ports"); | |
1187 | ||
1188 | inf_set_step_thread (inf, 0); /* The step thread is special. */ | |
1189 | ||
1190 | proc_steal_exc_port (inf->task, inf->event_port); | |
1191 | for (thread = inf->threads; thread; thread = thread->next) | |
1192 | proc_steal_exc_port (thread, MACH_PORT_NULL); | |
1193 | } | |
1194 | ||
1195 | /* Makes sure the process has its own exception ports. */ | |
1196 | void inf_restore_exc_ports (struct inf *inf) | |
1197 | { | |
1198 | struct proc *thread; | |
1199 | ||
1200 | inf_debug (inf, "restoring exception ports"); | |
1201 | ||
1202 | inf_set_step_thread (inf, 0); /* The step thread is special. */ | |
1203 | ||
1204 | proc_restore_exc_port (inf->task); | |
1205 | for (thread = inf->threads; thread; thread = thread->next) | |
1206 | proc_restore_exc_port (thread); | |
1207 | } | |
1208 | \f | |
1209 | /* Deliver signal SIG to INF. If INF is stopped, delivering a signal, even | |
1210 | signal 0, will continue it. INF is assumed to be in a paused state, and | |
1211 | the resume_sc's of INF's threads may be affected. */ | |
2847920a | 1212 | void |
ce0787ef FF |
1213 | inf_signal (struct inf *inf, enum target_signal sig) |
1214 | { | |
1215 | error_t err = 0; | |
1216 | int host_sig = target_signal_to_host (sig); | |
1217 | ||
1218 | #define NAME target_signal_to_name (sig) | |
1219 | ||
1220 | if (host_sig >= _NSIG) | |
1221 | /* A mach exception. Exceptions are encoded in the signal space by | |
1222 | putting them after _NSIG; this assumes they're positive (and not | |
1223 | extremely large)! */ | |
1224 | { | |
1225 | struct inf_wait *w = &inf->wait; | |
1226 | if (w->status.kind == TARGET_WAITKIND_STOPPED | |
1227 | && w->status.value.sig == sig | |
1228 | && w->thread && !w->thread->aborted) | |
1229 | /* We're passing through the last exception we received. This is | |
1230 | kind of bogus, because exceptions are per-thread whereas gdb | |
1231 | treats signals as per-process. We just forward the exception to | |
1232 | the correct handler, even it's not for the same thread as TID -- | |
1233 | i.e., we pretend it's global. */ | |
1234 | { | |
1235 | struct exc_state *e = &w->exc; | |
1236 | inf_debug (inf, "passing through exception:" | |
1237 | " task = %d, thread = %d, exc = %d" | |
1238 | ", code = %d, subcode = %d", | |
1239 | w->thread->port, inf->task->port, | |
1240 | e->exception, e->code, e->subcode); | |
1241 | err = | |
1242 | exception_raise_request (e->handler, | |
1243 | e->reply, MACH_MSG_TYPE_MOVE_SEND_ONCE, | |
1244 | w->thread->port, inf->task->port, | |
1245 | e->exception, e->code, e->subcode); | |
1246 | } | |
1247 | else | |
647e52ea | 1248 | error ("Can't forward spontaneous exception (%s).", NAME); |
ce0787ef FF |
1249 | } |
1250 | else | |
1251 | /* A Unix signal. */ | |
1252 | if (inf->stopped) | |
c889a1eb | 1253 | /* The process is stopped and expecting a signal. Just send off a |
ce0787ef FF |
1254 | request and let it get handled when we resume everything. */ |
1255 | { | |
1256 | inf_debug (inf, "sending %s to stopped process", NAME); | |
1257 | err = | |
1258 | INF_MSGPORT_RPC (inf, | |
1259 | msg_sig_post_untraced_request (msgport, | |
1260 | inf->event_port, | |
1261 | MACH_MSG_TYPE_MAKE_SEND_ONCE, | |
647e52ea | 1262 | host_sig, 0, |
ce0787ef FF |
1263 | refport)); |
1264 | if (! err) | |
1265 | /* Posting an untraced signal automatically continues it. | |
1266 | We clear this here rather than when we get the reply | |
1267 | because we'd rather assume it's not stopped when it | |
1268 | actually is, than the reverse. */ | |
1269 | inf->stopped = 0; | |
1270 | } | |
1271 | else | |
1272 | /* It's not expecting it. We have to let just the signal thread | |
1273 | run, and wait for it to get into a reasonable state before we | |
1274 | can continue the rest of the process. When we finally resume the | |
1275 | process the signal we request will be the very first thing that | |
1276 | happens. */ | |
1277 | { | |
1278 | inf_debug (inf, "sending %s to unstopped process (so resuming signal thread)", NAME); | |
1279 | err = | |
647e52ea SG |
1280 | INF_RESUME_MSGPORT_RPC (inf, msg_sig_post_untraced (msgport, |
1281 | host_sig, 0, refport)); | |
ce0787ef FF |
1282 | } |
1283 | ||
1284 | if (err == EIEIO) | |
1285 | /* Can't do too much... */ | |
1286 | warning ("Can't deliver signal %s: No signal thread.", NAME); | |
1287 | else if (err) | |
1288 | warning ("Delivering signal %s: %s", NAME, strerror (err)); | |
1289 | ||
1290 | #undef NAME | |
1291 | } | |
1292 | \f | |
1293 | /* The inferior used for all gdb target ops. */ | |
1294 | struct inf *current_inferior = 0; | |
1295 | ||
1296 | /* The inferior being waited for by gnu_wait. Since GDB is decidely not | |
1297 | multi-threaded, we don't bother to lock this. */ | |
1298 | struct inf *waiting_inf; | |
1299 | ||
1300 | /* Wait for something to happen in the inferior, returning what in STATUS. */ | |
1301 | static int | |
1302 | gnu_wait (int tid, struct target_waitstatus *status) | |
1303 | { | |
1304 | struct msg { | |
1305 | mach_msg_header_t hdr; | |
1306 | mach_msg_type_t type; | |
1307 | int data[8000]; | |
1308 | } msg; | |
1309 | error_t err; | |
1310 | struct proc *thread; | |
1311 | struct inf *inf = current_inferior; | |
1312 | ||
647e52ea SG |
1313 | assert (inf->task); |
1314 | ||
1315 | if (!inf->threads && !inf->pending_execs) | |
1316 | /* No threads! Assume that maybe some outside agency is frobbing our | |
1317 | task, and really look for new threads. If we can't find any, just tell | |
1318 | the user to try again later. */ | |
1319 | { | |
1320 | inf_validate_procs (inf); | |
1321 | if (!inf->threads && !inf->task->dead) | |
1322 | error ("There are no threads; try again later."); | |
1323 | } | |
1324 | ||
ce0787ef FF |
1325 | waiting_inf = inf; |
1326 | ||
1327 | inf_debug (inf, "waiting for: %d", tid); | |
1328 | ||
1329 | rewait: | |
1330 | if (proc_wait_pid != inf->pid && !inf->no_wait) | |
1331 | /* Always get information on events from the proc server. */ | |
1332 | { | |
1333 | inf_debug (inf, "requesting wait on pid %d", inf->pid); | |
1334 | ||
1335 | if (proc_wait_pid) | |
1336 | /* The proc server is single-threaded, and only allows a single | |
1337 | outstanding wait request, so we have to cancel the previous one. */ | |
1338 | { | |
1339 | inf_debug (inf, "cancelling previous wait on pid %d", proc_wait_pid); | |
647e52ea | 1340 | interrupt_operation (proc_server, 0); |
ce0787ef FF |
1341 | } |
1342 | ||
1343 | err = | |
1344 | proc_wait_request (proc_server, inf->event_port, inf->pid, WUNTRACED); | |
1345 | if (err) | |
1346 | warning ("wait request failed: %s", strerror (err)); | |
1347 | else | |
1348 | { | |
1349 | inf_debug (inf, "waits pending: %d", proc_waits_pending); | |
1350 | proc_wait_pid = inf->pid; | |
1351 | /* Even if proc_waits_pending was > 0 before, we still won't get | |
1352 | any other replies, because it was either from a different INF, | |
1353 | or a different process attached to INF -- and the event port, | |
1354 | which is the wait reply port, changes when you switch processes.*/ | |
1355 | proc_waits_pending = 1; | |
1356 | } | |
1357 | } | |
1358 | ||
1359 | inf_clear_wait (inf); | |
1360 | ||
1361 | /* What can happen? (1) Dead name notification; (2) Exceptions arrive; | |
1362 | (3) wait reply from the proc server. */ | |
1363 | ||
1364 | inf_debug (inf, "waiting for an event..."); | |
647e52ea SG |
1365 | err = mach_msg (&msg.hdr, MACH_RCV_MSG | MACH_RCV_INTERRUPT, |
1366 | 0, sizeof (struct msg), inf->event_port, | |
1367 | MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL); | |
ce0787ef FF |
1368 | |
1369 | /* Re-suspend the task. */ | |
1370 | inf_suspend (inf); | |
1371 | ||
2847920a MS |
1372 | if (!inf->task && inf->pending_execs) |
1373 | /* When doing an exec, it's possible that the old task wasn't reused | |
1374 | (e.g., setuid execs). So if the task seems to have disappeared, | |
1375 | attempt to refetch it, as the pid should still be the same. */ | |
1376 | inf_set_pid (inf, inf->pid); | |
1377 | ||
647e52ea | 1378 | if (err == EMACH_RCV_INTERRUPTED) |
ce0787ef FF |
1379 | inf_debug (inf, "interrupted"); |
1380 | else if (err) | |
1381 | error ("Couldn't wait for an event: %s", strerror (err)); | |
1382 | else | |
1383 | { | |
1384 | struct { | |
1385 | mach_msg_header_t hdr; | |
1386 | mach_msg_type_t err_type; | |
1387 | kern_return_t err; | |
1388 | char noise[200]; | |
1389 | } reply; | |
1390 | ||
1391 | inf_debug (inf, "event: msgid = %d", msg.hdr.msgh_id); | |
1392 | ||
1393 | /* Handle what we got. */ | |
1394 | if (! notify_server (&msg.hdr, &reply.hdr) | |
1395 | && ! exc_server (&msg.hdr, &reply.hdr) | |
1396 | && ! process_reply_server (&msg.hdr, &reply.hdr) | |
1397 | && ! msg_reply_server (&msg.hdr, &reply.hdr)) | |
1398 | /* Whatever it is, it's something strange. */ | |
1399 | error ("Got a strange event, msg id = %d.", msg.hdr.msgh_id); | |
1400 | ||
1401 | if (reply.err) | |
1402 | error ("Handling event, msgid = %d: %s", | |
1403 | msg.hdr.msgh_id, strerror (reply.err)); | |
1404 | } | |
1405 | ||
1406 | if (inf->pending_execs) | |
1407 | /* We're waiting for the inferior to finish execing. */ | |
1408 | { | |
1409 | struct inf_wait *w = &inf->wait; | |
1410 | enum target_waitkind kind = w->status.kind; | |
1411 | ||
1412 | if (kind == TARGET_WAITKIND_SPURIOUS) | |
1413 | /* Since gdb is actually counting the number of times the inferior | |
1414 | stops, expecting one stop per exec, we only return major events | |
1415 | while execing. */ | |
647e52ea SG |
1416 | { |
1417 | w->suppress = 1; | |
1418 | inf_debug (inf, "pending_execs = %d, ignoring minor event", | |
1419 | inf->pending_execs); | |
1420 | } | |
ce0787ef FF |
1421 | else if (kind == TARGET_WAITKIND_STOPPED |
1422 | && w->status.value.sig == TARGET_SIGNAL_TRAP) | |
1423 | /* Ah hah! A SIGTRAP from the inferior while starting up probably | |
1424 | means we've succesfully completed an exec! */ | |
647e52ea SG |
1425 | { |
1426 | if (--inf->pending_execs == 0) | |
1427 | /* We're done! */ | |
1428 | { | |
2847920a | 1429 | #if 0 /* do we need this? */ |
647e52ea SG |
1430 | prune_threads (1); /* Get rid of the old shell threads */ |
1431 | renumber_threads (0); /* Give our threads reasonable names. */ | |
c889a1eb | 1432 | #endif |
2847920a | 1433 | } |
647e52ea SG |
1434 | inf_debug (inf, "pending exec completed, pending_execs => %d", |
1435 | inf->pending_execs); | |
1436 | } | |
2847920a MS |
1437 | else if (kind == TARGET_WAITKIND_STOPPED) |
1438 | /* It's possible that this signal is because of a crashed process | |
1439 | being handled by the hurd crash server; in this case, the process | |
1440 | will have an extra task suspend, which we need to know about. | |
1441 | Since the code in inf_resume that normally checks for this is | |
1442 | disabled while INF->pending_execs, we do the check here instead. */ | |
1443 | inf_validate_task_sc (inf); | |
ce0787ef FF |
1444 | } |
1445 | ||
1446 | if (inf->wait.suppress) | |
1447 | /* Some totally spurious event happened that we don't consider | |
1448 | worth returning to gdb. Just keep waiting. */ | |
1449 | { | |
1450 | inf_debug (inf, "suppressing return, rewaiting..."); | |
1451 | inf_resume (inf); | |
1452 | goto rewait; | |
1453 | } | |
1454 | ||
1455 | /* Pass back out our results. */ | |
1456 | bcopy (&inf->wait.status, status, sizeof (*status)); | |
1457 | ||
1458 | thread = inf->wait.thread; | |
1459 | if (thread) | |
1460 | tid = thread->tid; | |
1461 | else | |
1462 | thread = inf_tid_to_thread (inf, tid); | |
1463 | ||
1464 | if (!thread || thread->port == MACH_PORT_NULL) | |
1465 | /* TID is dead; try and find a new thread. */ | |
1466 | if (inf_update_procs (inf) && inf->threads) | |
1467 | tid = inf->threads->tid; /* The first available thread. */ | |
1468 | else | |
c889a1eb | 1469 | tid = inferior_pid; /* let wait_for_inferior handle exit case */ |
ce0787ef FF |
1470 | |
1471 | if (thread && tid >= 0 && status->kind != TARGET_WAITKIND_SPURIOUS | |
1472 | && inf->pause_sc == 0 && thread->pause_sc == 0) | |
1473 | /* If something actually happened to THREAD, make sure we suspend it. */ | |
1474 | { | |
1475 | thread->sc = 1; | |
1476 | inf_update_suspends (inf); | |
1477 | } | |
1478 | ||
1479 | inf_debug (inf, "returning tid = %d, status = %s (%d)", tid, | |
1480 | status->kind == TARGET_WAITKIND_EXITED ? "EXITED" | |
1481 | : status->kind == TARGET_WAITKIND_STOPPED ? "STOPPED" | |
1482 | : status->kind == TARGET_WAITKIND_SIGNALLED ? "SIGNALLED" | |
1483 | : status->kind == TARGET_WAITKIND_LOADED ? "LOADED" | |
1484 | : status->kind == TARGET_WAITKIND_SPURIOUS ? "SPURIOUS" | |
1485 | : "?", | |
1486 | status->value.integer); | |
1487 | ||
1488 | return tid; | |
1489 | } | |
1490 | \f | |
1491 | /* The rpc handler called by exc_server. */ | |
1492 | error_t | |
1493 | S_exception_raise_request (mach_port_t port, mach_port_t reply_port, | |
1494 | thread_t thread_port, task_t task_port, | |
1495 | int exception, int code, int subcode) | |
1496 | { | |
1497 | struct inf *inf = waiting_inf; | |
1498 | struct proc *thread = inf_port_to_thread (inf, thread_port); | |
1499 | ||
1500 | inf_debug (waiting_inf, | |
1501 | "thread = %d, task = %d, exc = %d, code = %d, subcode = %d", | |
1502 | thread_port, task_port, exception, code); | |
1503 | ||
1504 | if (!thread) | |
1505 | /* We don't know about thread? */ | |
1506 | { | |
1507 | inf_update_procs (inf); | |
1508 | thread = inf_port_to_thread (inf, thread_port); | |
1509 | if (!thread) | |
1510 | /* Give up, the generating thread is gone. */ | |
1511 | return 0; | |
1512 | } | |
1513 | ||
1514 | mach_port_deallocate (mach_task_self (), thread_port); | |
1515 | mach_port_deallocate (mach_task_self (), task_port); | |
1516 | ||
1517 | if (! thread->aborted) | |
1518 | /* THREAD hasn't been aborted since this exception happened (abortion | |
1519 | clears any exception state), so it must be real. */ | |
1520 | { | |
1521 | /* Store away the details; this will destroy any previous info. */ | |
1522 | inf->wait.thread = thread; | |
1523 | ||
1524 | inf->wait.status.kind = TARGET_WAITKIND_STOPPED; | |
1525 | ||
1526 | if (exception == EXC_BREAKPOINT) | |
1527 | /* GDB likes to get SIGTRAP for breakpoints. */ | |
1528 | { | |
1529 | inf->wait.status.value.sig = TARGET_SIGNAL_TRAP; | |
1530 | mach_port_deallocate (mach_task_self (), reply_port); | |
1531 | } | |
1532 | else | |
1533 | /* Record the exception so that we can forward it later. */ | |
1534 | { | |
1535 | if (thread->exc_port == port) | |
647e52ea SG |
1536 | { |
1537 | inf_debug (waiting_inf, "Handler is thread exeption port <%d>", | |
1538 | thread->saved_exc_port); | |
1539 | inf->wait.exc.handler = thread->saved_exc_port; | |
1540 | } | |
ce0787ef FF |
1541 | else |
1542 | { | |
647e52ea SG |
1543 | inf_debug (waiting_inf, "Handler is task exeption port <%d>", |
1544 | inf->task->saved_exc_port); | |
ce0787ef FF |
1545 | inf->wait.exc.handler = inf->task->saved_exc_port; |
1546 | assert (inf->task->exc_port == port); | |
1547 | } | |
1548 | if (inf->wait.exc.handler != MACH_PORT_NULL) | |
1549 | /* Add a reference to the exception handler. */ | |
1550 | mach_port_mod_refs (mach_task_self (), | |
1551 | inf->wait.exc.handler, MACH_PORT_RIGHT_SEND, | |
1552 | 1); | |
1553 | ||
1554 | inf->wait.exc.exception = exception; | |
1555 | inf->wait.exc.code = code; | |
1556 | inf->wait.exc.subcode = subcode; | |
1557 | inf->wait.exc.reply = reply_port; | |
1558 | ||
1559 | /* Exceptions are encoded in the signal space by putting them after | |
1560 | _NSIG; this assumes they're positive (and not extremely large)! */ | |
1561 | inf->wait.status.value.sig = | |
1562 | target_signal_from_host (_NSIG + exception); | |
1563 | } | |
1564 | } | |
1565 | else | |
1566 | /* A supppressed exception, which ignore. */ | |
1567 | { | |
1568 | inf->wait.suppress = 1; | |
1569 | mach_port_deallocate (mach_task_self (), reply_port); | |
1570 | } | |
1571 | ||
1572 | return 0; | |
1573 | } | |
1574 | \f | |
1575 | /* Fill in INF's wait field after a task has died without giving us more | |
1576 | detailed information. */ | |
2847920a | 1577 | void |
ce0787ef FF |
1578 | inf_task_died_status (struct inf *inf) |
1579 | { | |
1580 | warning ("Pid %d died with unknown exit status, using SIGKILL.", inf->pid); | |
1581 | inf->wait.status.kind = TARGET_WAITKIND_SIGNALLED; | |
1582 | inf->wait.status.value.sig = TARGET_SIGNAL_KILL; | |
1583 | } | |
ce0787ef | 1584 | |
647e52ea | 1585 | /* Notify server routines. The only real one is dead name notification. */ |
ce0787ef FF |
1586 | error_t |
1587 | do_mach_notify_dead_name (mach_port_t notify, mach_port_t dead_port) | |
1588 | { | |
1589 | struct inf *inf = waiting_inf; | |
1590 | ||
1591 | inf_debug (waiting_inf, "port = %d", dead_port); | |
1592 | ||
1593 | if (inf->task && inf->task->port == dead_port) | |
1594 | { | |
1595 | proc_debug (inf->task, "is dead"); | |
1596 | inf->task->port = MACH_PORT_NULL; | |
1597 | if (proc_wait_pid == inf->pid) | |
1598 | /* We have a wait outstanding on the process, which will return more | |
1599 | detailed information, so delay until we get that. */ | |
1600 | inf->wait.suppress = 1; | |
1601 | else | |
1602 | /* We never waited for the process (maybe it wasn't a child), so just | |
1603 | pretend it got a SIGKILL. */ | |
1604 | inf_task_died_status (inf); | |
1605 | } | |
1606 | else | |
1607 | { | |
1608 | struct proc *thread = inf_port_to_thread (inf, dead_port); | |
1609 | if (thread) | |
1610 | { | |
1611 | proc_debug (thread, "is dead"); | |
1612 | thread->port = MACH_PORT_NULL; | |
1613 | } | |
1614 | } | |
1615 | ||
1616 | mach_port_deallocate (mach_task_self (), dead_port); | |
1617 | inf->threads_up_to_date = 0; /* Just in case */ | |
1618 | ||
1619 | return 0; | |
1620 | } | |
647e52ea | 1621 | \f |
ce0787ef FF |
1622 | static error_t |
1623 | ill_rpc (char *fun) | |
1624 | { | |
1625 | warning ("illegal rpc: %s", fun); | |
1626 | return 0; | |
1627 | } | |
1628 | ||
1629 | error_t | |
1630 | do_mach_notify_no_senders (mach_port_t notify, mach_port_mscount_t count) | |
1631 | { | |
1632 | return ill_rpc (__FUNCTION__); | |
1633 | } | |
1634 | ||
1635 | error_t | |
1636 | do_mach_notify_port_deleted (mach_port_t notify, mach_port_t name) | |
1637 | { | |
1638 | return ill_rpc (__FUNCTION__); | |
1639 | } | |
1640 | ||
1641 | error_t | |
1642 | do_mach_notify_msg_accepted (mach_port_t notify, mach_port_t name) | |
1643 | { | |
1644 | return ill_rpc (__FUNCTION__); | |
1645 | } | |
1646 | ||
1647 | error_t | |
1648 | do_mach_notify_port_destroyed (mach_port_t notify, mach_port_t name) | |
1649 | { | |
1650 | return ill_rpc (__FUNCTION__); | |
1651 | } | |
1652 | ||
1653 | error_t | |
1654 | do_mach_notify_send_once (mach_port_t notify) | |
1655 | { | |
1656 | return ill_rpc (__FUNCTION__); | |
1657 | } | |
1658 | \f | |
1659 | /* Process_reply server routines. We only use process_wait_reply. */ | |
1660 | ||
1661 | error_t | |
1662 | S_proc_wait_reply (mach_port_t reply, error_t err, | |
647e52ea | 1663 | int status, int sigcode, rusage_t rusage, pid_t pid) |
ce0787ef FF |
1664 | { |
1665 | struct inf *inf = waiting_inf; | |
1666 | ||
647e52ea SG |
1667 | inf_debug (inf, "err = %s, pid = %d, status = 0x%x, sigcode = %d", |
1668 | err ? strerror (err) : "0", pid, status, sigcode); | |
ce0787ef FF |
1669 | |
1670 | if (err && proc_wait_pid && (!inf->task || !inf->task->port)) | |
1671 | /* Ack. The task has died, but the task-died notification code didn't | |
1672 | tell anyone because it thought a more detailed reply from the | |
1673 | procserver was forthcoming. However, we now learn that won't | |
1674 | happen... So we have to act like the task just died, and this time, | |
1675 | tell the world. */ | |
1676 | inf_task_died_status (inf); | |
1677 | ||
1678 | if (--proc_waits_pending == 0) | |
1679 | /* PROC_WAIT_PID represents the most recent wait. We will always get | |
1680 | replies in order because the proc server is single threaded. */ | |
1681 | proc_wait_pid = 0; | |
1682 | ||
1683 | inf_debug (inf, "waits pending now: %d", proc_waits_pending); | |
1684 | ||
1685 | if (err) | |
1686 | { | |
1687 | if (err != EINTR) | |
1688 | { | |
1689 | warning ("Can't wait for pid %d: %s", inf->pid, strerror (err)); | |
1690 | inf->no_wait = 1; | |
1691 | ||
1692 | /* Since we can't see the inferior's signals, don't trap them. */ | |
1693 | inf_set_traced (inf, 0); | |
1694 | } | |
1695 | } | |
1696 | else if (pid == inf->pid) | |
1697 | { | |
1698 | store_waitstatus (&inf->wait.status, status); | |
1699 | if (inf->wait.status.kind == TARGET_WAITKIND_STOPPED) | |
1700 | /* The process has sent us a signal, and stopped itself in a sane | |
1701 | state pending our actions. */ | |
1702 | { | |
1703 | inf_debug (inf, "process has stopped itself"); | |
1704 | inf->stopped = 1; | |
ce0787ef FF |
1705 | } |
1706 | } | |
1707 | else | |
1708 | inf->wait.suppress = 1; /* Something odd happened. Ignore. */ | |
1709 | ||
1710 | return 0; | |
1711 | } | |
1712 | ||
1713 | error_t | |
1714 | S_proc_setmsgport_reply (mach_port_t reply, error_t err, | |
1715 | mach_port_t old_msg_port) | |
1716 | { | |
1717 | return ill_rpc (__FUNCTION__); | |
1718 | } | |
1719 | ||
1720 | error_t | |
1721 | S_proc_getmsgport_reply (mach_port_t reply, error_t err, mach_port_t msg_port) | |
1722 | { | |
1723 | return ill_rpc (__FUNCTION__); | |
1724 | } | |
1725 | \f | |
1726 | /* Msg_reply server routines. We only use msg_sig_post_untraced_reply. */ | |
1727 | ||
1728 | error_t | |
1729 | S_msg_sig_post_untraced_reply (mach_port_t reply, error_t err) | |
1730 | { | |
1731 | struct inf *inf = waiting_inf; | |
1732 | ||
1733 | if (err == EBUSY) | |
1734 | /* EBUSY is what we get when the crash server has grabbed control of the | |
1735 | process and doesn't like what signal we tried to send it. Just act | |
1736 | like the process stopped (using a signal of 0 should mean that the | |
1737 | *next* time the user continues, it will pass signal 0, which the crash | |
1738 | server should like). */ | |
1739 | { | |
1740 | inf->wait.status.kind = TARGET_WAITKIND_STOPPED; | |
1741 | inf->wait.status.value.sig = TARGET_SIGNAL_0; | |
1742 | } | |
1743 | else if (err) | |
1744 | warning ("Signal delivery failed: %s", strerror (err)); | |
1745 | ||
1746 | if (err) | |
1747 | /* We only get this reply when we've posted a signal to a process which we | |
1748 | thought was stopped, and which we expected to continue after the signal. | |
1749 | Given that the signal has failed for some reason, it's reasonable to | |
1750 | assume it's still stopped. */ | |
1751 | inf->stopped = 1; | |
1752 | else | |
1753 | inf->wait.suppress = 1; | |
1754 | ||
1755 | return 0; | |
1756 | } | |
1757 | ||
1758 | error_t | |
1759 | S_msg_sig_post_reply (mach_port_t reply, error_t err) | |
1760 | { | |
1761 | return ill_rpc (__FUNCTION__); | |
1762 | } | |
1763 | \f | |
1764 | /* Returns the number of messages queued for the receive right PORT. */ | |
1765 | static mach_port_msgcount_t | |
1766 | port_msgs_queued (mach_port_t port) | |
1767 | { | |
1768 | struct mach_port_status status; | |
1769 | error_t err = | |
1770 | mach_port_get_receive_status (mach_task_self (), port, &status); | |
1771 | ||
1772 | if (err) | |
1773 | return 0; | |
1774 | else | |
1775 | return status.mps_msgcount; | |
1776 | } | |
1777 | \f | |
1778 | /* Resume execution of the inferior process. | |
1779 | ||
1780 | If STEP is nonzero, single-step it. | |
1781 | If SIGNAL is nonzero, give it that signal. | |
1782 | ||
1783 | TID STEP: | |
1784 | -1 true Single step the current thread allowing other threads to run. | |
1785 | -1 false Continue the current thread allowing other threads to run. | |
1786 | X true Single step the given thread, don't allow any others to run. | |
1787 | X false Continue the given thread, do not allow any others to run. | |
1788 | (Where X, of course, is anything except -1) | |
1789 | ||
1790 | Note that a resume may not `take' if there are pending exceptions/&c | |
1791 | still unprocessed from the last resume we did (any given resume may result | |
1792 | in multiple events returned by wait). | |
1793 | */ | |
1794 | static void | |
1795 | gnu_resume (int tid, int step, enum target_signal sig) | |
1796 | { | |
1797 | struct proc *step_thread = 0; | |
1798 | struct inf *inf = current_inferior; | |
1799 | ||
1800 | inf_debug (inf, "tid = %d, step = %d, sig = %d", tid, step, sig); | |
1801 | ||
1802 | if (sig != TARGET_SIGNAL_0 || inf->stopped) | |
1803 | inf_signal (inf, sig); | |
1804 | else if (inf->wait.exc.reply != MACH_PORT_NULL) | |
1805 | /* We received an exception to which we have chosen not to forward, so | |
1806 | abort the faulting thread, which will perhaps retake it. */ | |
1807 | { | |
1808 | proc_abort (inf->wait.thread, 1); | |
1809 | warning ("Aborting %s with unforwarded exception %s.", | |
1810 | proc_string (inf->wait.thread), | |
1811 | target_signal_to_name (inf->wait.status.value.sig)); | |
1812 | } | |
1813 | ||
1814 | if (port_msgs_queued (inf->event_port)) | |
1815 | /* If there are still messages in our event queue, don't bother resuming | |
1816 | the process, as we're just going to stop it right away anyway. */ | |
1817 | return; | |
1818 | ||
647e52ea SG |
1819 | inf_update_procs (inf); |
1820 | ||
ce0787ef FF |
1821 | if (tid < 0) |
1822 | /* Allow all threads to run, except perhaps single-stepping one. */ | |
1823 | { | |
1824 | inf_debug (inf, "running all threads; tid = %d", inferior_pid); | |
1825 | tid = inferior_pid; /* What to step. */ | |
1826 | inf_set_threads_resume_sc (inf, 0, 1); | |
1827 | } | |
1828 | else | |
1829 | /* Just allow a single thread to run. */ | |
1830 | { | |
1831 | struct proc *thread = inf_tid_to_thread (inf, tid); | |
647e52ea SG |
1832 | if (! thread) |
1833 | error ("Can't run single thread id %d: no such thread!"); | |
ce0787ef FF |
1834 | inf_debug (inf, "running one thread: %d/%d", inf->pid, thread->tid); |
1835 | inf_set_threads_resume_sc (inf, thread, 0); | |
1836 | } | |
1837 | ||
1838 | if (step) | |
1839 | { | |
1840 | step_thread = inf_tid_to_thread (inf, tid); | |
647e52ea SG |
1841 | if (! step_thread) |
1842 | warning ("Can't step thread id %d: no such thread.", tid); | |
1843 | else | |
1844 | inf_debug (inf, "stepping thread: %d/%d", inf->pid, step_thread->tid); | |
ce0787ef FF |
1845 | } |
1846 | if (step_thread != inf->step_thread) | |
1847 | inf_set_step_thread (inf, step_thread); | |
1848 | ||
1849 | inf_debug (inf, "here we go..."); | |
1850 | inf_resume (inf); | |
1851 | } | |
1852 | \f | |
1853 | static void | |
1854 | gnu_kill_inferior () | |
1855 | { | |
1856 | struct proc *task = current_inferior->task; | |
1857 | if (task) | |
1858 | { | |
1859 | proc_debug (task, "terminating..."); | |
1860 | task_terminate (task->port); | |
2847920a | 1861 | inf_set_pid (current_inferior, -1); |
ce0787ef FF |
1862 | } |
1863 | target_mourn_inferior (); | |
1864 | } | |
1865 | ||
1866 | /* Clean up after the inferior dies. */ | |
1867 | ||
1868 | static void | |
1869 | gnu_mourn_inferior () | |
1870 | { | |
1871 | inf_debug (current_inferior, "rip"); | |
1872 | inf_detach (current_inferior); | |
1873 | unpush_target (&gnu_ops); | |
1874 | generic_mourn_inferior (); | |
1875 | } | |
1876 | \f | |
1877 | /* Fork an inferior process, and start debugging it. */ | |
1878 | ||
1879 | /* Set INFERIOR_PID to the first thread available in the child, if any. */ | |
c889a1eb MS |
1880 | static int |
1881 | inf_pick_first_thread () | |
ce0787ef FF |
1882 | { |
1883 | if (current_inferior->task && current_inferior->threads) | |
1884 | /* The first thread. */ | |
c889a1eb | 1885 | return current_inferior->threads->tid; |
ce0787ef FF |
1886 | else |
1887 | /* What may be the next thread. */ | |
c889a1eb | 1888 | return next_thread_id; |
ce0787ef FF |
1889 | } |
1890 | ||
1891 | static struct inf * | |
1892 | cur_inf () | |
1893 | { | |
1894 | if (! current_inferior) | |
1895 | current_inferior = make_inf (); | |
1896 | return current_inferior; | |
1897 | } | |
1898 | ||
1899 | static void | |
1900 | gnu_create_inferior (exec_file, allargs, env) | |
1901 | char *exec_file; | |
1902 | char *allargs; | |
1903 | char **env; | |
1904 | { | |
1905 | struct inf *inf = cur_inf (); | |
1906 | ||
1907 | void trace_me () | |
1908 | { | |
1909 | /* We're in the child; make this process stop as soon as it execs. */ | |
1910 | inf_debug (inf, "tracing self"); | |
647e52ea SG |
1911 | if (ptrace (PTRACE_TRACEME) != 0) |
1912 | error ("ptrace (PTRACE_TRACEME) failed!"); | |
ce0787ef | 1913 | } |
647e52ea | 1914 | int attach_to_child (int pid) |
ce0787ef FF |
1915 | { |
1916 | /* Attach to the now stopped child, which is actually a shell... */ | |
1917 | inf_debug (inf, "attaching to child: %d", pid); | |
1918 | ||
1919 | inf_attach (inf, pid); | |
ce0787ef FF |
1920 | |
1921 | attach_flag = 0; | |
1922 | push_target (&gnu_ops); | |
1923 | ||
1924 | inf->pending_execs = 2; | |
1925 | inf->traced = 1; | |
1926 | ||
1927 | /* Now let the child run again, knowing that it will stop immediately | |
1928 | because of the ptrace. */ | |
1929 | inf_resume (inf); | |
c889a1eb | 1930 | inferior_pid = inf_pick_first_thread (); |
ce0787ef | 1931 | |
c889a1eb | 1932 | startup_inferior (inf->pending_execs); |
647e52ea | 1933 | |
c889a1eb | 1934 | return inferior_pid; |
ce0787ef FF |
1935 | } |
1936 | ||
1937 | inf_debug (inf, "creating inferior"); | |
1938 | ||
1939 | fork_inferior (exec_file, allargs, env, trace_me, attach_to_child, NULL); | |
1940 | ||
1941 | inf_update_signal_thread (inf); | |
1942 | inf_set_traced (inf, inf->want_signals); | |
1943 | ||
1944 | /* Execing the process will have trashed our exception ports; steal them | |
1945 | back (or make sure they're restored if the user wants that). */ | |
1946 | if (inf->want_exceptions) | |
1947 | inf_steal_exc_ports (inf); | |
1948 | else | |
1949 | inf_restore_exc_ports (inf); | |
1950 | ||
1951 | /* Here we go! */ | |
1952 | proceed ((CORE_ADDR) -1, 0, 0); | |
1953 | } | |
1954 | ||
1955 | /* Mark our target-struct as eligible for stray "run" and "attach" | |
1956 | commands. */ | |
1957 | static int | |
1958 | gnu_can_run () | |
1959 | { | |
1960 | return 1; | |
1961 | } | |
1962 | \f | |
1963 | #ifdef ATTACH_DETACH | |
1964 | ||
1965 | /* Attach to process PID, then initialize for debugging it | |
1966 | and wait for the trace-trap that results from attaching. */ | |
1967 | static void | |
1968 | gnu_attach (args, from_tty) | |
1969 | char *args; | |
1970 | int from_tty; | |
1971 | { | |
1972 | int pid; | |
1973 | char *exec_file; | |
1974 | struct inf *inf = cur_inf (); | |
1975 | ||
1976 | if (!args) | |
1977 | error_no_arg ("PID to attach"); | |
1978 | ||
1979 | pid = atoi (args); | |
1980 | ||
1981 | if (pid == getpid()) /* Trying to masturbate? */ | |
1982 | error ("I refuse to debug myself!"); | |
1983 | ||
1984 | if (from_tty) | |
1985 | { | |
1986 | exec_file = (char *) get_exec_file (0); | |
1987 | ||
1988 | if (exec_file) | |
1989 | printf_unfiltered ("Attaching to program `%s', pid %d\n", | |
1990 | exec_file, pid); | |
1991 | else | |
1992 | printf_unfiltered ("Attaching to pid %d\n", pid); | |
1993 | ||
1994 | gdb_flush (gdb_stdout); | |
1995 | } | |
1996 | ||
1997 | inf_debug (inf, "attaching to pid: %d", pid); | |
1998 | ||
1999 | inf_attach (inf, pid); | |
2000 | inf_update_procs (inf); | |
2001 | ||
c889a1eb | 2002 | inferior_pid = inf_pick_first_thread (); |
ce0787ef FF |
2003 | |
2004 | attach_flag = 1; | |
2005 | push_target (&gnu_ops); | |
2006 | ||
2007 | inf_update_signal_thread (inf); | |
2008 | inf_set_traced (inf, inf->want_signals); | |
2009 | ||
2010 | /* If the process was stopped before we attached, make it continue the next | |
2011 | time the user does a continue. */ | |
2012 | inf_validate_stopped (inf); | |
647e52ea | 2013 | |
2847920a | 2014 | #if 0 /* Do we need this? */ |
647e52ea | 2015 | renumber_threads (0); /* Give our threads reasonable names. */ |
c889a1eb | 2016 | #endif |
ce0787ef FF |
2017 | } |
2018 | \f | |
2019 | /* Take a program previously attached to and detaches it. | |
2020 | The program resumes execution and will no longer stop | |
2021 | on signals, etc. We'd better not have left any breakpoints | |
2022 | in the program or it'll die when it hits one. For this | |
2023 | to work, it may be necessary for the process to have been | |
2024 | previously attached. It *might* work if the program was | |
2025 | started via fork. */ | |
2026 | static void | |
2027 | gnu_detach (args, from_tty) | |
2028 | char *args; | |
2029 | int from_tty; | |
2030 | { | |
2031 | if (from_tty) | |
2032 | { | |
2033 | char *exec_file = get_exec_file (0); | |
2034 | if (exec_file) | |
2035 | printf_unfiltered ("Detaching from program `%s' pid %d\n", | |
2036 | exec_file, current_inferior->pid); | |
2037 | else | |
2038 | printf_unfiltered ("Detaching from pid %d\n", current_inferior->pid); | |
2039 | gdb_flush (gdb_stdout); | |
2040 | } | |
2041 | ||
2042 | inf_detach (current_inferior); | |
2043 | ||
2044 | inferior_pid = 0; | |
2045 | ||
2046 | unpush_target (&gnu_ops); /* Pop out of handling an inferior */ | |
2047 | } | |
2048 | #endif /* ATTACH_DETACH */ | |
2049 | ||
2050 | static void | |
2051 | gnu_terminal_init_inferior () | |
2052 | { | |
2053 | assert (current_inferior); | |
2054 | terminal_init_inferior_with_pgrp (current_inferior->pid); | |
2055 | } | |
2056 | ||
2057 | /* Get ready to modify the registers array. On machines which store | |
2058 | individual registers, this doesn't need to do anything. On machines | |
2059 | which store all the registers in one fell swoop, this makes sure | |
2060 | that registers contains all the registers from the program being | |
2061 | debugged. */ | |
2062 | ||
2063 | static void | |
2064 | gnu_prepare_to_store () | |
2065 | { | |
2066 | #ifdef CHILD_PREPARE_TO_STORE | |
2067 | CHILD_PREPARE_TO_STORE (); | |
2068 | #endif | |
2069 | } | |
2070 | ||
2071 | static void | |
2072 | gnu_open (arg, from_tty) | |
2073 | char *arg; | |
2074 | int from_tty; | |
2075 | { | |
2076 | error ("Use the \"run\" command to start a Unix child process."); | |
2077 | } | |
2078 | ||
2079 | static void | |
2080 | gnu_stop () | |
2081 | { | |
2082 | error ("to_stop target function not implemented"); | |
2083 | } | |
2084 | ||
2085 | static int | |
2086 | gnu_thread_alive (int tid) | |
2087 | { | |
2088 | inf_update_procs (current_inferior); | |
2089 | return !!inf_tid_to_thread (current_inferior, tid); | |
2090 | } | |
2091 | \f | |
2092 | /* | |
2093 | * Read inferior task's LEN bytes from ADDR and copy it to MYADDR | |
2094 | * in gdb's address space. | |
2095 | * | |
2096 | * Return 0 on failure; number of bytes read otherwise. | |
2097 | */ | |
2098 | int | |
2099 | gnu_read_inferior (task, addr, myaddr, length) | |
2100 | task_t task; | |
2101 | CORE_ADDR addr; | |
2102 | char *myaddr; | |
2103 | int length; | |
2104 | { | |
2105 | error_t err; | |
2106 | vm_address_t low_address = (vm_address_t) trunc_page (addr); | |
2107 | vm_size_t aligned_length = | |
2108 | (vm_size_t) round_page (addr+length) - low_address; | |
2109 | pointer_t copied; | |
2110 | int copy_count; | |
2111 | ||
2112 | /* Get memory from inferior with page aligned addresses */ | |
2113 | err = vm_read (task, low_address, aligned_length, &copied, ©_count); | |
2114 | if (err) | |
2115 | return 0; | |
2116 | ||
2117 | err = hurd_safe_copyin (myaddr, (void*)addr - low_address + copied, length); | |
2118 | if (err) | |
2119 | { | |
2120 | warning ("Read from inferior faulted: %s", strerror (err)); | |
2121 | length = 0; | |
2122 | } | |
2123 | ||
2124 | err = vm_deallocate (mach_task_self (), copied, copy_count); | |
2125 | if (err) | |
2126 | warning ("gnu_read_inferior vm_deallocate failed: %s", strerror (err)); | |
2127 | ||
2128 | return length; | |
2129 | } | |
2130 | ||
2131 | #define CHK_GOTO_OUT(str,ret) \ | |
2132 | do if (ret != KERN_SUCCESS) { errstr = #str; goto out; } while(0) | |
2133 | ||
2134 | struct vm_region_list { | |
2135 | struct vm_region_list *next; | |
2136 | vm_prot_t protection; | |
2137 | vm_address_t start; | |
2138 | vm_size_t length; | |
2139 | }; | |
2140 | ||
2141 | struct obstack region_obstack; | |
2142 | ||
2143 | /* | |
c889a1eb MS |
2144 | * Write gdb's LEN bytes from MYADDR and copy it to ADDR |
2145 | * in inferior task's address space. | |
ce0787ef FF |
2146 | */ |
2147 | int | |
2148 | gnu_write_inferior (task, addr, myaddr, length) | |
2149 | task_t task; | |
2150 | CORE_ADDR addr; | |
2151 | char *myaddr; | |
2152 | int length; | |
2153 | { | |
2154 | error_t err = 0; | |
2155 | vm_address_t low_address = (vm_address_t) trunc_page (addr); | |
2156 | vm_size_t aligned_length = | |
2157 | (vm_size_t) round_page (addr+length) - low_address; | |
2158 | pointer_t copied; | |
2159 | int copy_count; | |
2160 | int deallocate = 0; | |
2161 | ||
2162 | char *errstr = "Bug in gnu_write_inferior"; | |
2163 | ||
2164 | struct vm_region_list *region_element; | |
2165 | struct vm_region_list *region_head = (struct vm_region_list *)NULL; | |
2166 | ||
2167 | /* Get memory from inferior with page aligned addresses */ | |
2168 | err = vm_read (task, | |
2169 | low_address, | |
2170 | aligned_length, | |
2171 | &copied, | |
2172 | ©_count); | |
2173 | CHK_GOTO_OUT ("gnu_write_inferior vm_read failed", err); | |
2174 | ||
2175 | deallocate++; | |
2176 | ||
2177 | err = hurd_safe_copyout ((void*)addr - low_address + copied, myaddr, length); | |
2178 | CHK_GOTO_OUT ("Write to inferior faulted", err); | |
2179 | ||
2180 | obstack_init (®ion_obstack); | |
2181 | ||
2182 | /* Do writes atomically. | |
2183 | * First check for holes and unwritable memory. | |
2184 | */ | |
2185 | { | |
2186 | vm_size_t remaining_length = aligned_length; | |
2187 | vm_address_t region_address = low_address; | |
2188 | ||
2189 | struct vm_region_list *scan; | |
2190 | ||
2191 | while(region_address < low_address + aligned_length) | |
2192 | { | |
2193 | vm_prot_t protection; | |
2194 | vm_prot_t max_protection; | |
2195 | vm_inherit_t inheritance; | |
2196 | boolean_t shared; | |
2197 | mach_port_t object_name; | |
2198 | vm_offset_t offset; | |
2199 | vm_size_t region_length = remaining_length; | |
2200 | vm_address_t old_address = region_address; | |
2201 | ||
2202 | err = vm_region (task, | |
2203 | ®ion_address, | |
2204 | ®ion_length, | |
2205 | &protection, | |
2206 | &max_protection, | |
2207 | &inheritance, | |
2208 | &shared, | |
2209 | &object_name, | |
2210 | &offset); | |
2211 | CHK_GOTO_OUT ("vm_region failed", err); | |
2212 | ||
2213 | /* Check for holes in memory */ | |
2214 | if (old_address != region_address) | |
2215 | { | |
2216 | warning ("No memory at 0x%x. Nothing written", | |
2217 | old_address); | |
2218 | err = KERN_SUCCESS; | |
2219 | length = 0; | |
2220 | goto out; | |
2221 | } | |
2222 | ||
2223 | if (!(max_protection & VM_PROT_WRITE)) | |
2224 | { | |
2225 | warning ("Memory at address 0x%x is unwritable. Nothing written", | |
2226 | old_address); | |
2227 | err = KERN_SUCCESS; | |
2228 | length = 0; | |
2229 | goto out; | |
2230 | } | |
2231 | ||
2232 | /* Chain the regions for later use */ | |
2233 | region_element = | |
2234 | (struct vm_region_list *) | |
2235 | obstack_alloc (®ion_obstack, sizeof (struct vm_region_list)); | |
2236 | ||
2237 | region_element->protection = protection; | |
2238 | region_element->start = region_address; | |
2239 | region_element->length = region_length; | |
2240 | ||
2241 | /* Chain the regions along with protections */ | |
2242 | region_element->next = region_head; | |
2243 | region_head = region_element; | |
2244 | ||
2245 | region_address += region_length; | |
2246 | remaining_length = remaining_length - region_length; | |
2247 | } | |
2248 | ||
2249 | /* If things fail after this, we give up. | |
2250 | * Somebody is messing up inferior_task's mappings. | |
2251 | */ | |
2252 | ||
2253 | /* Enable writes to the chained vm regions */ | |
2254 | for (scan = region_head; scan; scan = scan->next) | |
2255 | { | |
2256 | boolean_t protection_changed = FALSE; | |
2257 | ||
2258 | if (!(scan->protection & VM_PROT_WRITE)) | |
2259 | { | |
2260 | err = vm_protect (task, | |
2261 | scan->start, | |
2262 | scan->length, | |
2263 | FALSE, | |
2264 | scan->protection | VM_PROT_WRITE); | |
2265 | CHK_GOTO_OUT ("vm_protect: enable write failed", err); | |
2266 | } | |
2267 | } | |
2268 | ||
2269 | err = vm_write (task, | |
2270 | low_address, | |
2271 | copied, | |
2272 | aligned_length); | |
2273 | CHK_GOTO_OUT ("vm_write failed", err); | |
2274 | ||
2275 | /* Set up the original region protections, if they were changed */ | |
2276 | for (scan = region_head; scan; scan = scan->next) | |
2277 | { | |
2278 | boolean_t protection_changed = FALSE; | |
2279 | ||
2280 | if (!(scan->protection & VM_PROT_WRITE)) | |
2281 | { | |
2282 | err = vm_protect (task, | |
2283 | scan->start, | |
2284 | scan->length, | |
2285 | FALSE, | |
2286 | scan->protection); | |
2287 | CHK_GOTO_OUT ("vm_protect: enable write failed", err); | |
2288 | } | |
2289 | } | |
2290 | } | |
2291 | ||
2292 | out: | |
2293 | if (deallocate) | |
2294 | { | |
2295 | obstack_free (®ion_obstack, 0); | |
2296 | ||
2297 | (void) vm_deallocate (mach_task_self (), | |
2298 | copied, | |
2299 | copy_count); | |
2300 | } | |
2301 | ||
2302 | if (err != KERN_SUCCESS) | |
2303 | { | |
2304 | warning ("%s: %s", errstr, mach_error_string (err)); | |
2305 | return 0; | |
2306 | } | |
2307 | ||
2308 | return length; | |
2309 | } | |
2310 | \f | |
2311 | /* Return 0 on failure, number of bytes handled otherwise. */ | |
2312 | static int | |
2313 | gnu_xfer_memory (memaddr, myaddr, len, write, target) | |
2314 | CORE_ADDR memaddr; | |
2315 | char *myaddr; | |
2316 | int len; | |
2317 | int write; | |
2318 | struct target_ops *target; /* IGNORED */ | |
2319 | { | |
2320 | int result; | |
2321 | task_t task = | |
2322 | current_inferior | |
2323 | ? (current_inferior->task ? current_inferior->task->port : 0) | |
2324 | : 0; | |
2325 | ||
2326 | if (task == MACH_PORT_NULL) | |
2327 | return 0; | |
2328 | else | |
2329 | { | |
2330 | inf_debug (current_inferior, "%s %p[%d] %s %p", | |
2331 | write ? "writing" : "reading", memaddr, len, | |
2332 | write ? "<--" : "-->", myaddr); | |
2333 | if (write) | |
2334 | return gnu_write_inferior (task, memaddr, myaddr, len); | |
2335 | else | |
2336 | return gnu_read_inferior (task, memaddr, myaddr, len); | |
2337 | } | |
2338 | } | |
2339 | \f | |
2340 | extern void gnu_store_registers (int regno); | |
2341 | extern void gnu_fetch_registers (int regno); | |
2342 | ||
c719b714 JM |
2343 | struct target_ops gnu_ops ; |
2344 | ||
2345 | static void | |
2346 | init_gnu_ops(void) | |
2347 | { | |
2348 | gnu_ops.to_shortname = "GNU"; /* to_shortname */ | |
2349 | gnu_ops.to_longname = "GNU Hurd process"; /* to_longname */ | |
2350 | gnu_ops.to_doc = "GNU Hurd process"; /* to_doc */ | |
2351 | gnu_ops.to_open = gnu_open; /* to_open */ | |
2352 | gnu_ops.to_close = 0; /* to_close */ | |
2353 | gnu_ops.to_attach = gnu_attach; /* to_attach */ | |
2354 | gnu_ops.to_detach = gnu_detach; /* to_detach */ | |
2355 | gnu_ops.to_resume = gnu_resume; /* to_resume */ | |
2356 | gnu_ops.to_wait = gnu_wait; /* to_wait */ | |
2357 | gnu_ops.to_fetch_registers = gnu_fetch_registers; /* to_fetch_registers */ | |
2358 | gnu_ops.to_store_registers = gnu_store_registers; /* to_store_registers */ | |
2359 | gnu_ops.to_prepare_to_store = gnu_prepare_to_store; /* to_prepare_to_store */ | |
2360 | gnu_ops.to_xfer_memory = gnu_xfer_memory; /* to_xfer_memory */ | |
2361 | gnu_ops.to_files_info = 0; /* to_files_info */ | |
2362 | gnu_ops.to_insert_breakpoint = memory_insert_breakpoint; | |
2363 | gnu_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
2364 | gnu_ops.to_terminal_init = gnu_terminal_init_inferior; | |
2365 | gnu_ops.to_terminal_inferior = terminal_inferior; | |
2366 | gnu_ops.to_terminal_ours_for_output = terminal_ours_for_output; | |
2367 | gnu_ops.to_terminal_ours = terminal_ours; | |
2368 | gnu_ops.to_terminal_info = child_terminal_info; | |
2369 | gnu_ops.to_kill = gnu_kill_inferior; /* to_kill */ | |
2370 | gnu_ops.to_load = 0; /* to_load */ | |
2371 | gnu_ops.to_lookup_symbol = 0; /* to_lookup_symbol */ | |
2372 | gnu_ops.to_create_inferior = gnu_create_inferior; /* to_create_inferior */ | |
2373 | gnu_ops.to_mourn_inferior = gnu_mourn_inferior; /* to_mourn_inferior */ | |
2374 | gnu_ops.to_can_run = gnu_can_run; /* to_can_run */ | |
2375 | gnu_ops.to_notice_signals = 0; /* to_notice_signals */ | |
2376 | gnu_ops.to_thread_alive = gnu_thread_alive;/* to_thread_alive */ | |
2377 | gnu_ops.to_stop = gnu_stop; /* to_stop */ | |
2378 | gnu_ops.to_stratum = process_stratum; /* to_stratum */ | |
2379 | gnu_ops.DONT_USE = 0; /* to_next */ | |
2380 | gnu_ops.to_has_all_memory = 1; /* to_has_all_memory */ | |
2381 | gnu_ops.to_has_memory = 1; /* to_has_memory */ | |
2382 | gnu_ops.to_has_stack = 1; /* to_has_stack */ | |
2383 | gnu_ops.to_has_registers = 1; /* to_has_registers */ | |
2384 | gnu_ops.to_has_execution = 1; /* to_has_execution */ | |
2385 | gnu_ops.to_sections = 0; /* sections */ | |
2386 | gnu_ops.to_sections_end = 0; /* sections_end */ | |
2387 | gnu_ops.to_magic = OPS_MAGIC ; /* to_magic */ | |
2388 | } /* init_gnu_ops */ | |
ce0787ef | 2389 | \f |
c889a1eb | 2390 | /* Return printable description of proc. */ |
ce0787ef FF |
2391 | char *proc_string (struct proc *proc) |
2392 | { | |
2393 | static char tid_str[80]; | |
2394 | if (proc_is_task (proc)) | |
2395 | sprintf (tid_str, "process %d", proc->inf->pid); | |
2396 | else | |
2397 | sprintf (tid_str, "thread %d.%d", | |
2847920a | 2398 | proc->inf->pid, pid_to_thread_id (proc->tid)); |
ce0787ef FF |
2399 | return tid_str; |
2400 | } | |
2401 | ||
2402 | char * | |
2403 | gnu_target_pid_to_str (int tid) | |
2404 | { | |
2405 | struct inf *inf = current_inferior; | |
2406 | struct proc *thread = inf_tid_to_thread (inf, tid); | |
2407 | ||
2408 | if (thread) | |
2409 | return proc_string (thread); | |
2410 | else | |
2411 | { | |
2412 | static char tid_str[80]; | |
2413 | sprintf (tid_str, "bogus thread id %d", tid); | |
2414 | return tid_str; | |
2415 | } | |
2416 | } | |
2417 | \f | |
2418 | /* User task commands. */ | |
2419 | ||
2420 | struct cmd_list_element *set_task_cmd_list = 0; | |
2421 | struct cmd_list_element *show_task_cmd_list = 0; | |
c889a1eb MS |
2422 | /* User thread commands. */ |
2423 | ||
2424 | /* Commands with a prefix of `set/show thread'. */ | |
2425 | extern struct cmd_list_element *thread_cmd_list; | |
2426 | struct cmd_list_element *set_thread_cmd_list = NULL; | |
2427 | struct cmd_list_element *show_thread_cmd_list = NULL; | |
2428 | ||
2429 | /* Commands with a prefix of `set/show thread default'. */ | |
2430 | struct cmd_list_element *set_thread_default_cmd_list = NULL; | |
2431 | struct cmd_list_element *show_thread_default_cmd_list = NULL; | |
2432 | ||
2433 | static void | |
2434 | set_thread_cmd (char *args, int from_tty) | |
2435 | { | |
2436 | printf_unfiltered ("\"set thread\" must be followed by the name of a thread | |
2437 | property, or \"default\".\n"); | |
2438 | } | |
2439 | ||
2440 | static void | |
2441 | show_thread_cmd (char *args, int from_tty) | |
2442 | { | |
2443 | printf_unfiltered ("\"show thread\" must be followed by the name of a thread property, or \"default\".\n"); | |
2444 | } | |
2445 | ||
2446 | static void | |
2447 | set_thread_default_cmd (char *args, int from_tty) | |
2448 | { | |
2449 | printf_unfiltered ("\"set thread default\" must be followed by the name of a thread property.\n"); | |
2450 | } | |
ce0787ef | 2451 | |
c889a1eb MS |
2452 | static void |
2453 | show_thread_default_cmd (char *args, int from_tty) | |
2454 | { | |
2455 | printf_unfiltered ("\"show thread default\" must be followed by the name of a thread property.\n"); | |
2456 | } | |
ce0787ef | 2457 | |
647e52ea SG |
2458 | static int |
2459 | parse_int_arg (char *args, char *cmd_prefix) | |
2460 | { | |
2461 | if (args) | |
2462 | { | |
2463 | char *arg_end; | |
2464 | int val = strtoul (args, &arg_end, 10); | |
2465 | if (*args && *arg_end == '\0') | |
2466 | return val; | |
2467 | } | |
2468 | error ("Illegal argument for \"%s\" command, should be an integer.", cmd_prefix); | |
2469 | } | |
2470 | ||
ce0787ef FF |
2471 | static int |
2472 | _parse_bool_arg (char *args, char *t_val, char *f_val, char *cmd_prefix) | |
2473 | { | |
2474 | if (!args || strcmp (args, t_val) == 0) | |
2475 | return 1; | |
2476 | else if (strcmp (args, f_val) == 0) | |
2477 | return 0; | |
2478 | else | |
2479 | error ("Illegal argument for \"%s\" command, should be \"%s\" or \"%s\".", | |
2480 | cmd_prefix, t_val, f_val); | |
2481 | } | |
2482 | ||
2483 | #define parse_bool_arg(args, cmd_prefix) \ | |
2484 | _parse_bool_arg (args, "on", "off", cmd_prefix) | |
2485 | ||
2486 | static void | |
2487 | check_empty (char *args, char *cmd_prefix) | |
2488 | { | |
2489 | if (args) | |
2490 | error ("Garbage after \"%s\" command: `%s'", cmd_prefix, args); | |
2491 | } | |
2492 | ||
2493 | /* Returns the alive thread named by INFERIOR_PID, or signals an error. */ | |
2494 | static struct proc * | |
2495 | cur_thread () | |
2496 | { | |
2497 | struct inf *inf = cur_inf (); | |
2498 | struct proc *thread = inf_tid_to_thread (inf, inferior_pid); | |
2499 | if (!thread) | |
2500 | error ("No current thread."); | |
2501 | return thread; | |
2502 | } | |
2503 | ||
647e52ea SG |
2504 | /* Returns the current inferior, but signals an error if it has no task. */ |
2505 | static struct inf * | |
2506 | active_inf () | |
2507 | { | |
2508 | struct inf *inf = cur_inf (); | |
2509 | if (! inf->task) | |
2510 | error ("No current process."); | |
2511 | return inf; | |
2512 | } | |
2513 | \f | |
ce0787ef FF |
2514 | static void |
2515 | set_task_pause_cmd (char *args, int from_tty) | |
2516 | { | |
2517 | struct inf *inf = cur_inf (); | |
2518 | int old_sc = inf->pause_sc; | |
2519 | ||
2520 | inf->pause_sc = parse_bool_arg (args, "set task pause"); | |
2521 | ||
2522 | if (old_sc == 0 && inf->pause_sc != 0) | |
2523 | /* If the task is currently unsuspended, immediately suspend it, | |
2524 | otherwise wait until the next time it gets control. */ | |
2525 | inf_suspend (inf); | |
2526 | } | |
2527 | ||
2528 | static void | |
2529 | show_task_pause_cmd (char *args, int from_tty) | |
2530 | { | |
2531 | struct inf *inf = cur_inf (); | |
2532 | check_empty (args, "show task pause"); | |
2533 | printf_unfiltered ("The inferior task %s suspended while gdb has control.\n", | |
2534 | inf->task | |
2535 | ? (inf->pause_sc == 0 ? "isn't" : "is") | |
2536 | : (inf->pause_sc == 0 ? "won't be" : "will be")); | |
2537 | } | |
2538 | ||
647e52ea SG |
2539 | static void |
2540 | set_task_detach_sc_cmd (char *args, int from_tty) | |
2541 | { | |
2542 | cur_inf ()->detach_sc = parse_int_arg (args, "set task detach-suspend-count"); | |
2543 | } | |
2544 | ||
2545 | static void | |
2546 | show_task_detach_sc_cmd (char *args, int from_tty) | |
2547 | { | |
2548 | check_empty (args, "show task detach-suspend-count"); | |
2549 | printf_unfiltered ("The inferior task will be left with a suspend count of %d when detaching.\n", | |
2550 | cur_inf ()->detach_sc); | |
2551 | } | |
2552 | \f | |
ce0787ef FF |
2553 | static void |
2554 | set_thread_default_pause_cmd (char *args, int from_tty) | |
2555 | { | |
2556 | struct inf *inf = cur_inf (); | |
2557 | inf->default_thread_pause_sc = | |
2558 | parse_bool_arg (args, "set thread default pause") ? 0 : 1; | |
2559 | } | |
2560 | ||
2561 | static void | |
2562 | show_thread_default_pause_cmd (char *args, int from_tty) | |
2563 | { | |
2564 | struct inf *inf = cur_inf (); | |
2565 | int sc = inf->default_thread_pause_sc; | |
2566 | check_empty (args, "show thread default pause"); | |
2567 | printf_unfiltered ("New threads %s suspended while gdb has control%s.\n", | |
2568 | sc ? "are" : "aren't", | |
647e52ea | 2569 | !sc && inf->pause_sc ? " (but the task is)" : ""); |
ce0787ef FF |
2570 | } |
2571 | ||
2572 | static void | |
2573 | set_thread_default_run_cmd (char *args, int from_tty) | |
2574 | { | |
2575 | struct inf *inf = cur_inf (); | |
2576 | inf->default_thread_run_sc = | |
2577 | parse_bool_arg (args, "set thread default run") ? 0 : 1; | |
2578 | } | |
2579 | ||
2580 | static void | |
2581 | show_thread_default_run_cmd (char *args, int from_tty) | |
2582 | { | |
2583 | struct inf *inf = cur_inf (); | |
2584 | check_empty (args, "show thread default run"); | |
2585 | printf_unfiltered ("New threads %s allowed to run.\n", | |
2586 | inf->default_thread_run_sc == 0 ? "are" : "aren't"); | |
2587 | } | |
2588 | ||
647e52ea SG |
2589 | static void |
2590 | set_thread_default_detach_sc_cmd (char *args, int from_tty) | |
2591 | { | |
2592 | cur_inf ()->default_thread_detach_sc = | |
2593 | parse_int_arg (args, "set thread default detach-suspend-count"); | |
2594 | } | |
2595 | ||
2596 | static void | |
2597 | show_thread_default_detach_sc_cmd (char *args, int from_tty) | |
2598 | { | |
2599 | check_empty (args, "show thread default detach-suspend-count"); | |
2600 | printf_unfiltered ("New threads will get a detach-suspend-count of %d.\n", | |
2601 | cur_inf ()->default_thread_detach_sc); | |
2602 | } | |
2603 | \f | |
ce0787ef FF |
2604 | /* Steal a send right called NAME in the inferior task, and make it PROC's |
2605 | saved exception port. */ | |
2606 | static void | |
2607 | steal_exc_port (struct proc *proc, mach_port_t name) | |
2608 | { | |
2609 | error_t err; | |
2610 | mach_port_t port; | |
2611 | mach_msg_type_name_t port_type; | |
2612 | ||
2613 | if (!proc || !proc->inf->task) | |
2614 | error ("No inferior task."); | |
2615 | ||
2616 | err = mach_port_extract_right (proc->inf->task->port, | |
2617 | name, MACH_MSG_TYPE_COPY_SEND, | |
2618 | &port, &port_type); | |
2619 | if (err) | |
2620 | error ("Couldn't extract send right %d from inferior: %s", | |
2621 | name, strerror (err)); | |
2622 | ||
2623 | if (proc->saved_exc_port) | |
2624 | /* Get rid of our reference to the old one. */ | |
2625 | mach_port_deallocate (mach_task_self (), proc->saved_exc_port); | |
2626 | ||
2627 | proc->saved_exc_port = port; | |
2628 | ||
2629 | if (! proc->exc_port) | |
2630 | /* If PROC is a thread, we may not have set its exception port before. | |
2631 | We can't use proc_steal_exc_port because it also sets saved_exc_port. */ | |
2632 | { | |
2633 | proc->exc_port = proc->inf->event_port; | |
2634 | err = proc_set_exception_port (proc, proc->exc_port); | |
2635 | error ("Can't set exception port for %s: %s", | |
2636 | proc_string (proc), strerror (err)); | |
2637 | } | |
2638 | } | |
647e52ea | 2639 | \f |
ce0787ef FF |
2640 | static void |
2641 | set_task_exc_port_cmd (char *args, int from_tty) | |
2642 | { | |
2643 | struct inf *inf = cur_inf (); | |
2644 | if (!args) | |
2645 | error ("No argument to \"set task exception-port\" command."); | |
2646 | steal_exc_port (inf->task, parse_and_eval_address (args)); | |
2647 | } | |
2648 | ||
ce0787ef FF |
2649 | static void |
2650 | set_stopped_cmd (char *args, int from_tty) | |
2651 | { | |
2652 | cur_inf ()->stopped = _parse_bool_arg (args, "yes", "no", "set stopped"); | |
2653 | } | |
2654 | ||
2655 | static void | |
2656 | show_stopped_cmd (char *args, int from_tty) | |
2657 | { | |
647e52ea | 2658 | struct inf *inf = active_inf (); |
ce0787ef | 2659 | check_empty (args, "show stopped"); |
ce0787ef FF |
2660 | printf_unfiltered ("The inferior process %s stopped.\n", |
2661 | inf->stopped ? "is" : "isn't"); | |
2662 | } | |
2663 | ||
2664 | static void | |
2665 | set_sig_thread_cmd (char *args, int from_tty) | |
2666 | { | |
2667 | int tid; | |
2668 | struct inf *inf = cur_inf (); | |
2669 | ||
2670 | if (!args || (! isdigit (*args) && strcmp (args, "none") != 0)) | |
2671 | error ("Illegal argument to \"set signal-thread\" command.\n" | |
2672 | "Should be an integer thread ID, or `none'."); | |
2673 | ||
2674 | if (strcmp (args, "none") == 0) | |
2675 | inf->signal_thread = 0; | |
2676 | else | |
2677 | { | |
2678 | int tid = thread_id_to_pid (atoi (args)); | |
2679 | if (tid < 0) | |
2680 | error ("Thread ID %s not known. Use the \"info threads\" command to\n" | |
2681 | "see the IDs of currently known threads.", args); | |
2682 | inf->signal_thread = inf_tid_to_thread (inf, tid); | |
2683 | } | |
2684 | } | |
2685 | ||
2686 | static void | |
2687 | show_sig_thread_cmd (char *args, int from_tty) | |
2688 | { | |
647e52ea | 2689 | struct inf *inf = active_inf (); |
ce0787ef | 2690 | check_empty (args, "show signal-thread"); |
ce0787ef FF |
2691 | if (inf->signal_thread) |
2692 | printf_unfiltered ("The signal thread is %s.\n", | |
2693 | proc_string (inf->signal_thread)); | |
2694 | else | |
2695 | printf_unfiltered ("There is no signal thread.\n"); | |
2696 | } | |
647e52ea SG |
2697 | \f |
2698 | static void | |
2699 | set_signals_cmd (char *args, int from_tty) | |
2700 | { | |
2701 | int trace; | |
2702 | struct inf *inf = cur_inf (); | |
2703 | ||
2704 | inf->want_signals = parse_bool_arg (args, "set signals"); | |
2705 | ||
2706 | if (inf->task && inf->want_signals != inf->traced) | |
2707 | /* Make this take effect immediately in a running process. */ | |
2708 | inf_set_traced (inf, inf->want_signals); | |
2709 | } | |
2710 | ||
2711 | static void | |
2712 | show_signals_cmd (char *args, int from_tty) | |
2713 | { | |
2714 | struct inf *inf = cur_inf (); | |
2715 | check_empty (args, "show signals"); | |
2716 | printf_unfiltered ("The inferior process's signals %s intercepted.\n", | |
2717 | inf->task | |
2718 | ? (inf->traced ? "are" : "aren't") | |
2719 | : (inf->want_signals ? "will be" : "won't be")); | |
2720 | } | |
ce0787ef FF |
2721 | |
2722 | static void | |
2723 | set_exceptions_cmd (char *args, int from_tty) | |
2724 | { | |
2725 | struct inf *inf = cur_inf (); | |
2726 | int val = parse_bool_arg (args, "set exceptions"); | |
2727 | ||
2728 | if (inf->task && inf->want_exceptions != val) | |
2729 | /* Make this take effect immediately in a running process. */ | |
2730 | /* XXX */; | |
2731 | ||
2732 | inf->want_exceptions = val; | |
2733 | } | |
2734 | ||
2735 | static void | |
2736 | show_exceptions_cmd (char *args, int from_tty) | |
2737 | { | |
2738 | struct inf *inf = cur_inf (); | |
2739 | check_empty (args, "show exceptions"); | |
2740 | printf_unfiltered ("Exceptions in the inferior %s trapped.\n", | |
2741 | inf->task | |
2742 | ? (inf->want_exceptions ? "are" : "aren't") | |
2743 | : (inf->want_exceptions ? "will be" : "won't be")); | |
2744 | } | |
647e52ea | 2745 | \f |
ce0787ef FF |
2746 | static void |
2747 | set_task_cmd (char *args, int from_tty) | |
2748 | { | |
2749 | printf_unfiltered ("\"set task\" must be followed by the name of a task property.\n"); | |
2750 | } | |
2751 | ||
2752 | static void | |
2753 | show_task_cmd (char *args, int from_tty) | |
2754 | { | |
2755 | struct inf *inf = cur_inf (); | |
2756 | ||
2757 | check_empty (args, "show task"); | |
2758 | ||
2759 | show_signals_cmd (0, from_tty); | |
2760 | show_exceptions_cmd (0, from_tty); | |
2761 | show_task_pause_cmd (0, from_tty); | |
2762 | ||
2763 | if (inf->pause_sc == 0) | |
2764 | show_thread_default_pause_cmd (0, from_tty); | |
2765 | show_thread_default_run_cmd (0, from_tty); | |
2766 | ||
2767 | if (inf->task) | |
2768 | { | |
2769 | show_stopped_cmd (0, from_tty); | |
2770 | show_sig_thread_cmd (0, from_tty); | |
2771 | } | |
647e52ea SG |
2772 | |
2773 | if (inf->detach_sc != 0) | |
2774 | show_task_detach_sc_cmd (0, from_tty); | |
2775 | if (inf->default_thread_detach_sc != 0) | |
2776 | show_thread_default_detach_sc_cmd (0, from_tty); | |
2777 | } | |
2778 | \f | |
2779 | static void | |
2780 | set_noninvasive_cmd (char *args, int from_tty) | |
2781 | { | |
2782 | /* Invert the sense of the arg for each component. */ | |
2783 | char *inv_args = parse_bool_arg (args, "set noninvasive") ? "off" : "on"; | |
2784 | ||
2785 | set_task_pause_cmd (inv_args, from_tty); | |
2786 | set_signals_cmd (inv_args, from_tty); | |
2787 | set_exceptions_cmd (inv_args, from_tty); | |
2788 | } | |
2789 | \f | |
2790 | static void | |
2791 | info_port_rights (char *args, mach_port_type_t only) | |
2792 | { | |
2793 | struct inf *inf = active_inf (); | |
2794 | value_ptr vmark = value_mark (); | |
2795 | ||
2796 | if (args) | |
2797 | /* Explicit list of port rights. */ | |
2798 | { | |
2799 | while (*args) | |
2800 | { | |
2801 | value_ptr val = parse_to_comma_and_eval (&args); | |
2802 | long right = value_as_long (val); | |
2803 | error_t err = | |
2804 | print_port_info (right, 0, inf->task->port, PORTINFO_DETAILS, | |
2805 | stdout); | |
2806 | if (err) | |
2807 | error ("%ld: %s.", right, strerror (err)); | |
2808 | } | |
2809 | } | |
2810 | else | |
2811 | /* Print all of them. */ | |
2812 | { | |
2813 | error_t err = | |
2814 | print_task_ports_info (inf->task->port, only, PORTINFO_DETAILS, | |
2815 | stdout); | |
2816 | if (err) | |
2817 | error ("%s.", strerror (err)); | |
2818 | } | |
2819 | ||
2820 | value_free_to_mark (vmark); | |
ce0787ef FF |
2821 | } |
2822 | ||
647e52ea SG |
2823 | static void |
2824 | info_send_rights_cmd (char *args, int from_tty) | |
2825 | { | |
2826 | info_port_rights (args, MACH_PORT_TYPE_SEND); | |
2827 | } | |
2828 | static void | |
2829 | info_recv_rights_cmd (char *args, int from_tty) | |
2830 | { | |
2831 | info_port_rights (args, MACH_PORT_TYPE_RECEIVE); | |
2832 | } | |
2833 | static void | |
2834 | info_port_sets_cmd (char *args, int from_tty) | |
2835 | { | |
2836 | info_port_rights (args, MACH_PORT_TYPE_PORT_SET); | |
2837 | } | |
2838 | static void | |
2839 | info_dead_names_cmd (char *args, int from_tty) | |
2840 | { | |
2841 | info_port_rights (args, MACH_PORT_TYPE_DEAD_NAME); | |
2842 | } | |
2843 | static void | |
2844 | info_port_rights_cmd (char *args, int from_tty) | |
2845 | { | |
2846 | info_port_rights (args, ~0); | |
2847 | } | |
2848 | \f | |
ce0787ef FF |
2849 | static void add_task_commands () |
2850 | { | |
2851 | add_cmd ("pause", class_run, set_thread_default_pause_cmd, | |
2852 | "Set whether the new threads are suspended while gdb has control.\n" | |
2853 | "This property normally has no effect because the whole task is\n" | |
2854 | "suspended, however, that may be disabled with \"set task pause off\".\n" | |
2855 | "The default value is \"off\".", | |
2856 | &set_thread_default_cmd_list); | |
2857 | add_cmd ("pause", no_class, show_thread_default_pause_cmd, | |
2858 | "Show whether new threads are suspended while gdb has control.", | |
2859 | &show_thread_default_cmd_list); | |
2860 | add_cmd ("run", class_run, set_thread_default_run_cmd, | |
2861 | "Set whether new threads are allowed to run (once gdb has noticed them).", | |
2862 | &set_thread_default_cmd_list); | |
2863 | add_cmd ("run", no_class, show_thread_default_run_cmd, | |
2864 | "Show whether new threads are allowed to run (once gdb has noticed | |
2865 | them).", | |
2866 | &show_thread_default_cmd_list); | |
647e52ea SG |
2867 | add_cmd ("detach-suspend-count", class_run, set_thread_default_detach_sc_cmd, |
2868 | "Set the default detach-suspend-count value for new threads.", | |
2869 | &set_thread_default_cmd_list); | |
2870 | add_cmd ("detach-suspend-count", no_class, show_thread_default_detach_sc_cmd, | |
2871 | "Show the default detach-suspend-count value for new threads.", | |
2872 | &show_thread_default_cmd_list); | |
ce0787ef FF |
2873 | |
2874 | add_cmd ("signals", class_run, set_signals_cmd, | |
2875 | "Set whether the inferior process's signals will be intercepted.\n" | |
2876 | "Mach exceptions (such as breakpoint traps) are not affected.", | |
2877 | &setlist); | |
2878 | add_alias_cmd ("sigs", "signals", class_run, 1, &setlist); | |
2879 | add_cmd ("signals", no_class, show_signals_cmd, | |
2880 | "Show whether the inferior process's signals will be intercepted.", | |
2881 | &showlist); | |
2882 | add_alias_cmd ("sigs", "signals", no_class, 1, &showlist); | |
2883 | ||
2884 | add_cmd ("signal-thread", class_run, set_sig_thread_cmd, | |
2885 | "Set the thread that gdb thinks is the libc signal thread.\n" | |
2886 | "This thread is run when delivering a signal to a non-stopped process.", | |
2887 | &setlist); | |
2888 | add_alias_cmd ("sigthread", "signal-thread", class_run, 1, &setlist); | |
2889 | add_cmd ("signal-thread", no_class, show_sig_thread_cmd, | |
2890 | "Set the thread that gdb thinks is the libc signal thread.", | |
2891 | &showlist); | |
2892 | add_alias_cmd ("sigthread", "signal-thread", no_class, 1, &showlist); | |
2893 | ||
2894 | add_cmd ("stopped", class_run, set_stopped_cmd, | |
2895 | "Set whether gdb thinks the inferior process is stopped as with SIGSTOP.\n" | |
2896 | "Stopped process will be continued by sending them a signal.", | |
2897 | &setlist); | |
2898 | add_cmd ("stopped", no_class, show_signals_cmd, | |
2899 | "Show whether gdb thinks the inferior process is stopped as with SIGSTOP.", | |
2900 | &showlist); | |
2901 | ||
2902 | add_cmd ("exceptions", class_run, set_exceptions_cmd, | |
2903 | "Set whether exceptions in the inferior process will be trapped.\n" | |
2904 | "When exceptions are turned off, neither breakpoints nor single-stepping\n" | |
2905 | "will work.", | |
2906 | &setlist); | |
2907 | /* Allow `set exc' despite conflict with `set exception-port'. */ | |
2908 | add_alias_cmd ("exc", "exceptions", class_run, 1, &setlist); | |
2909 | add_cmd ("exceptions", no_class, show_exceptions_cmd, | |
2910 | "Show whether exceptions in the inferior process will be trapped.", | |
2911 | &showlist); | |
2912 | ||
ce0787ef FF |
2913 | add_prefix_cmd ("task", no_class, set_task_cmd, |
2914 | "Command prefix for setting task attributes.", | |
2915 | &set_task_cmd_list, "set task ", 0, &setlist); | |
2916 | add_prefix_cmd ("task", no_class, show_task_cmd, | |
2917 | "Command prefix for showing task attributes.", | |
2918 | &show_task_cmd_list, "show task ", 0, &showlist); | |
2919 | ||
2920 | add_cmd ("pause", class_run, set_task_pause_cmd, | |
2921 | "Set whether the task is suspended while gdb has control.\n" | |
2922 | "A value of \"on\" takes effect immediately, otherwise nothing\n" | |
2923 | "happens until the next time the program is continued.\n" | |
2924 | "When setting this to \"off\", \"set thread default pause on\"\n" | |
2925 | "can be used to pause individual threads by default instead.", | |
2926 | &set_task_cmd_list); | |
2927 | add_cmd ("pause", no_class, show_task_pause_cmd, | |
2928 | "Show whether the task is suspended while gdb has control.", | |
2929 | &show_task_cmd_list); | |
647e52ea SG |
2930 | add_cmd ("detach-suspend-count", class_run, set_task_detach_sc_cmd, |
2931 | "Set the suspend count will leave on the thread when detaching.", | |
2932 | &set_task_cmd_list); | |
2933 | add_cmd ("detach-suspend-count", no_class, show_task_detach_sc_cmd, | |
2934 | "Show the suspend count will leave on the thread when detaching.", | |
2935 | &show_task_cmd_list); | |
ce0787ef FF |
2936 | |
2937 | add_cmd ("exception-port", no_class, set_task_exc_port_cmd, | |
2938 | "Set the task exception port to which we forward exceptions.\n" | |
2939 | "The argument should be the value of the send right in the task.", | |
2940 | &set_task_cmd_list); | |
2941 | add_alias_cmd ("excp", "exception-port", no_class, 1, &set_task_cmd_list); | |
2942 | add_alias_cmd ("exc-port", "exception-port", no_class, 1, &set_task_cmd_list); | |
647e52ea SG |
2943 | |
2944 | /* A convenient way of turning on all options require to noninvasively | |
2945 | debug running tasks. */ | |
2946 | add_cmd ("noninvasive", no_class, set_noninvasive_cmd, | |
2947 | "Set task options so that we interfere as little as possible.\n" | |
2948 | "This is the same as setting `task pause', `exceptions', and" | |
2949 | "`signals' to the opposite value.", | |
2950 | &setlist); | |
2951 | ||
2952 | /* Commands to show information about the task's ports. */ | |
2953 | add_cmd ("send-rights", class_info, info_send_rights_cmd, | |
2954 | "Show information about the task's send rights", | |
2955 | &infolist); | |
2956 | add_cmd ("receive-rights", class_info, info_recv_rights_cmd, | |
2957 | "Show information about the task's receive rights", | |
2958 | &infolist); | |
2959 | add_cmd ("port-rights", class_info, info_send_rights_cmd, | |
2960 | "Show information about the task's port rights", | |
2961 | &infolist); | |
2962 | add_cmd ("port-sets", class_info, info_port_sets_cmd, | |
2963 | "Show information about the task's port sets", | |
2964 | &infolist); | |
2965 | add_cmd ("dead-names", class_info, info_dead_names_cmd, | |
2966 | "Show information about the task's dead names", | |
2967 | &infolist); | |
2968 | add_info_alias ("ports", "port-rights", 1); | |
2969 | add_info_alias ("port", "port-rights", 1); | |
2970 | add_info_alias ("psets", "port-sets", 1); | |
ce0787ef FF |
2971 | } |
2972 | \f | |
ce0787ef FF |
2973 | |
2974 | static void | |
2975 | set_thread_pause_cmd (char *args, int from_tty) | |
2976 | { | |
2977 | struct proc *thread = cur_thread (); | |
2978 | int old_sc = thread->pause_sc; | |
2979 | thread->pause_sc = parse_bool_arg (args, "set thread pause"); | |
2980 | if (old_sc == 0 && thread->pause_sc != 0 && thread->inf->pause_sc == 0) | |
2981 | /* If the task is currently unsuspended, immediately suspend it, | |
2982 | otherwise wait until the next time it gets control. */ | |
2983 | inf_suspend (thread->inf); | |
2984 | } | |
2985 | ||
2986 | static void | |
2987 | show_thread_pause_cmd (char *args, int from_tty) | |
2988 | { | |
2989 | struct proc *thread = cur_thread (); | |
2990 | int sc = thread->pause_sc; | |
2991 | check_empty (args, "show task pause"); | |
2992 | printf_unfiltered ("Thread %s %s suspended while gdb has control%s.\n", | |
2993 | proc_string (thread), | |
2994 | sc ? "is" : "isn't", | |
647e52ea | 2995 | !sc && thread->inf->pause_sc ? " (but the task is)" : ""); |
ce0787ef FF |
2996 | } |
2997 | ||
2998 | static void | |
2999 | set_thread_run_cmd (char *args, int from_tty) | |
3000 | { | |
3001 | struct proc *thread = cur_thread (); | |
3002 | thread->run_sc = parse_bool_arg (args, "set thread run") ? 0 : 1; | |
3003 | } | |
3004 | ||
3005 | static void | |
3006 | show_thread_run_cmd (char *args, int from_tty) | |
3007 | { | |
3008 | struct proc *thread = cur_thread (); | |
3009 | check_empty (args, "show thread run"); | |
647e52ea | 3010 | printf_unfiltered ("Thread %s %s allowed to run.", |
ce0787ef FF |
3011 | proc_string (thread), |
3012 | thread->run_sc == 0 ? "is" : "isn't"); | |
3013 | } | |
3014 | ||
647e52ea SG |
3015 | static void |
3016 | set_thread_detach_sc_cmd (char *args, int from_tty) | |
3017 | { | |
3018 | cur_thread ()->detach_sc = parse_int_arg (args, "set thread detach-suspend-count"); | |
3019 | } | |
3020 | ||
3021 | static void | |
3022 | show_thread_detach_sc_cmd (char *args, int from_tty) | |
3023 | { | |
3024 | struct proc *thread = cur_thread (); | |
3025 | check_empty (args, "show thread detach-suspend-count"); | |
3026 | printf_unfiltered ("Thread %s will be left with a suspend count of %d when detaching.\n", | |
3027 | proc_string (thread), | |
3028 | thread->detach_sc); | |
3029 | } | |
3030 | ||
ce0787ef FF |
3031 | static void |
3032 | set_thread_exc_port_cmd (char *args, int from_tty) | |
3033 | { | |
3034 | struct proc *thread = cur_thread (); | |
3035 | if (!args) | |
3036 | error ("No argument to \"set thread exception-port\" command."); | |
3037 | steal_exc_port (thread, parse_and_eval_address (args)); | |
3038 | } | |
3039 | ||
c889a1eb | 3040 | #if 0 |
ce0787ef FF |
3041 | static void |
3042 | show_thread_cmd (char *args, int from_tty) | |
3043 | { | |
647e52ea | 3044 | struct proc *thread = cur_thread (); |
ce0787ef FF |
3045 | check_empty (args, "show thread"); |
3046 | show_thread_run_cmd (0, from_tty); | |
3047 | show_thread_pause_cmd (0, from_tty); | |
647e52ea SG |
3048 | if (thread->detach_sc != 0) |
3049 | show_thread_detach_sc_cmd (0, from_tty); | |
3050 | } | |
c889a1eb | 3051 | #endif |
647e52ea SG |
3052 | |
3053 | static void | |
3054 | thread_takeover_sc_cmd (char *args, int from_tty) | |
3055 | { | |
3056 | struct proc *thread = cur_thread (); | |
3057 | thread_basic_info_data_t _info; | |
3058 | thread_basic_info_t info = &_info; | |
3059 | mach_msg_type_number_t info_len = THREAD_BASIC_INFO_COUNT; | |
3060 | error_t err = | |
3061 | thread_info (thread->port, THREAD_BASIC_INFO, (int *)&info, &info_len); | |
3062 | if (err) | |
3063 | error ("%s.", strerror (err)); | |
3064 | thread->sc = info->suspend_count; | |
3065 | if (from_tty) | |
3066 | printf_unfiltered ("Suspend count was %d.\n", thread->sc); | |
3067 | if (info != &_info) | |
3068 | vm_deallocate (mach_task_self (), (vm_address_t)info, info_len * sizeof (int)); | |
ce0787ef FF |
3069 | } |
3070 | ||
3071 | add_thread_commands () | |
3072 | { | |
c889a1eb MS |
3073 | add_prefix_cmd ("thread", no_class, set_thread_cmd, |
3074 | "Command prefix for setting thread properties.", | |
3075 | &set_thread_cmd_list, "set thread ", 0, &setlist); | |
3076 | add_prefix_cmd ("default", no_class, show_thread_cmd, | |
3077 | "Command prefix for setting default thread properties.", | |
3078 | &set_thread_default_cmd_list, "set thread default ", 0, | |
3079 | &set_thread_cmd_list); | |
3080 | add_prefix_cmd ("thread", no_class, set_thread_default_cmd, | |
3081 | "Command prefix for showing thread properties.", | |
3082 | &show_thread_cmd_list, "show thread ", 0, &showlist); | |
3083 | add_prefix_cmd ("default", no_class, show_thread_default_cmd, | |
3084 | "Command prefix for showing default thread properties.", | |
3085 | &show_thread_default_cmd_list, "show thread default ", 0, | |
3086 | &show_thread_cmd_list); | |
3087 | ||
ce0787ef FF |
3088 | add_cmd ("pause", class_run, set_thread_pause_cmd, |
3089 | "Set whether the current thread is suspended while gdb has control.\n" | |
3090 | "A value of \"on\" takes effect immediately, otherwise nothing\n" | |
3091 | "happens until the next time the program is continued. This\n" | |
3092 | "property normally has no effect because the whole task is suspended,\n" | |
3093 | "however, that may be disabled with \"set task pause off\".\n" | |
3094 | "The default value is \"off\".", | |
3095 | &set_thread_cmd_list); | |
3096 | add_cmd ("pause", no_class, show_thread_pause_cmd, | |
3097 | "Show whether the current thread is suspended while gdb has control.", | |
3098 | &show_thread_cmd_list); | |
3099 | ||
3100 | add_cmd ("run", class_run, set_thread_run_cmd, | |
3101 | "Set whether the current thread is allowed to run.", | |
3102 | &set_thread_cmd_list); | |
3103 | add_cmd ("run", no_class, show_thread_run_cmd, | |
3104 | "Show whether the current thread is allowed to run.", | |
3105 | &show_thread_cmd_list); | |
3106 | ||
647e52ea SG |
3107 | add_cmd ("detach-suspend-count", class_run, set_thread_detach_sc_cmd, |
3108 | "Set the suspend count will leave on the thread when detaching.\n" | |
3109 | "Note that this is relative to suspend count when gdb noticed the thread;\n" | |
3110 | "use the `thread takeover-suspend-count' to force it to an absolute value.", | |
3111 | &set_thread_cmd_list); | |
3112 | add_cmd ("detach-suspend-count", no_class, show_thread_detach_sc_cmd, | |
3113 | "Show the suspend count will leave on the thread when detaching." | |
3114 | "Note that this is relative to suspend count when gdb noticed the thread;\n" | |
3115 | "use the `thread takeover-suspend-count' to force it to an absolute value.", | |
3116 | &show_thread_cmd_list); | |
3117 | ||
ce0787ef FF |
3118 | add_cmd ("exception-port", no_class, set_thread_exc_port_cmd, |
3119 | "Set the exception port to which we forward exceptions for the\n" | |
3120 | "current thread, overriding the task exception port.\n" | |
3121 | "The argument should be the value of the send right in the task.", | |
3122 | &set_thread_cmd_list); | |
3123 | add_alias_cmd ("excp", "exception-port", no_class, 1, &set_thread_cmd_list); | |
3124 | add_alias_cmd ("exc-port", "exception-port", no_class, 1, &set_thread_cmd_list); | |
647e52ea SG |
3125 | |
3126 | add_cmd ("takeover-suspend-count", no_class, thread_takeover_sc_cmd, | |
3127 | "Force the threads absolute suspend-count to be gdb's.\n" | |
3128 | "Prior to giving this command, gdb's thread suspend-counts are relative to\n" | |
3129 | "the thread's initial suspend-count when gdb notices the threads.", | |
3130 | &thread_cmd_list); | |
ce0787ef FF |
3131 | } |
3132 | \f | |
3133 | void | |
3134 | _initialize_gnu_nat () | |
3135 | { | |
3136 | proc_server = getproc (); | |
c719b714 | 3137 | init_gnu_ops() ; |
ce0787ef | 3138 | add_target (&gnu_ops); |
ce0787ef FF |
3139 | add_task_commands (); |
3140 | add_thread_commands (); | |
3141 | ||
3142 | #if MAINTENANCE_CMDS | |
3143 | add_set_cmd ("gnu-debug", class_maintenance, | |
3144 | var_boolean, (char *)&gnu_debug_flag, | |
3145 | "Set debugging output for the gnu backend.", &maintenancelist); | |
3146 | #endif | |
3147 | } | |
3148 | \f | |
3149 | #ifdef FLUSH_INFERIOR_CACHE | |
3150 | ||
3151 | /* When over-writing code on some machines the I-Cache must be flushed | |
3152 | explicitly, because it is not kept coherent by the lazy hardware. | |
3153 | This definitely includes breakpoints, for instance, or else we | |
3154 | end up looping in mysterious Bpt traps */ | |
3155 | ||
3156 | void | |
3157 | flush_inferior_icache(pc, amount) | |
3158 | CORE_ADDR pc; | |
3159 | { | |
3160 | vm_machine_attribute_val_t flush = MATTR_VAL_ICACHE_FLUSH; | |
3161 | error_t ret; | |
3162 | ||
3163 | ret = vm_machine_attribute (current_inferior->task->port, | |
3164 | pc, | |
3165 | amount, | |
3166 | MATTR_CACHE, | |
3167 | &flush); | |
3168 | if (ret != KERN_SUCCESS) | |
3169 | warning ("Error flushing inferior's cache : %s", strerror (ret)); | |
3170 | } | |
3171 | #endif FLUSH_INFERIOR_CACHE |