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da59e081 | 1 | /* Interface GDB to the GNU Hurd. |
b6ba6518 KB |
2 | Copyright 1992, 1995, 1996, 1997, 1998, 1999, 2000 |
3 | Free Software Foundation, Inc. | |
c906108c SS |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | Written by Miles Bader <miles@gnu.ai.mit.edu> | |
8 | ||
9 | Some code and ideas from m3-nat.c by Jukka Virtanen <jtv@hut.fi> | |
10 | ||
11 | This program is free software; you can redistribute it and/or modify | |
12 | it under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation; either version 2 of the License, or | |
14 | (at your option) any later version. | |
15 | ||
16 | This program is distributed in the hope that it will be useful, | |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
20 | ||
21 | You should have received a copy of the GNU General Public License | |
22 | along with this program; if not, write to the Free Software | |
c5aa993b JM |
23 | Foundation, Inc., 59 Temple Place - Suite 330, |
24 | Boston, MA 02111-1307, USA. | |
25 | */ | |
c906108c | 26 | |
942fd805 | 27 | #include <errno.h> |
c906108c | 28 | #include <limits.h> |
942fd805 MK |
29 | #include <setjmp.h> |
30 | #include <signal.h> | |
31 | #include <stdio.h> | |
32 | #include <string.h> | |
c906108c SS |
33 | #include <sys/ptrace.h> |
34 | ||
c906108c | 35 | #include <mach.h> |
c906108c SS |
36 | #include <mach_error.h> |
37 | #include <mach/exception.h> | |
942fd805 MK |
38 | #include <mach/message.h> |
39 | #include <mach/notify.h> | |
c906108c SS |
40 | #include <mach/vm_attributes.h> |
41 | ||
942fd805 MK |
42 | #include <hurd.h> |
43 | #include <hurd/interrupt.h> | |
c906108c SS |
44 | #include <hurd/msg.h> |
45 | #include <hurd/msg_request.h> | |
942fd805 MK |
46 | #include <hurd/process.h> |
47 | #include <hurd/process_request.h> | |
c906108c | 48 | #include <hurd/signal.h> |
c906108c SS |
49 | #include <hurd/sigpreempt.h> |
50 | ||
51 | #include <portinfo.h> | |
52 | ||
53 | #include "defs.h" | |
54 | #include "inferior.h" | |
55 | #include "symtab.h" | |
56 | #include "value.h" | |
57 | #include "language.h" | |
58 | #include "target.h" | |
03f2053f | 59 | #include "gdb_wait.h" |
c906108c SS |
60 | #include "gdbcmd.h" |
61 | #include "gdbcore.h" | |
942fd805 | 62 | #include "gdbthread.h" |
bf62e5b4 | 63 | #include "gdb_assert.h" |
c906108c SS |
64 | |
65 | #include "gnu-nat.h" | |
66 | ||
67 | #include "exc_request_S.h" | |
68 | #include "notify_S.h" | |
69 | #include "process_reply_S.h" | |
70 | #include "msg_reply_S.h" | |
71 | #include "exc_request_U.h" | |
72 | #include "msg_U.h" | |
73 | ||
74 | static process_t proc_server = MACH_PORT_NULL; | |
75 | ||
76 | /* If we've sent a proc_wait_request to the proc server, the pid of the | |
77 | process we asked about. We can only ever have one outstanding. */ | |
78 | int proc_wait_pid = 0; | |
79 | ||
80 | /* The number of wait requests we've sent, and expect replies from. */ | |
81 | int proc_waits_pending = 0; | |
82 | ||
83 | int gnu_debug_flag = 0; | |
84 | ||
85 | /* Forward decls */ | |
86 | ||
87 | extern struct target_ops gnu_ops; | |
c906108c | 88 | |
c906108c SS |
89 | struct inf *make_inf (); |
90 | void inf_clear_wait (struct inf *inf); | |
91 | void inf_cleanup (struct inf *inf); | |
92 | void inf_startup (struct inf *inf, int pid); | |
93 | int inf_update_suspends (struct inf *inf); | |
94 | void inf_set_pid (struct inf *inf, pid_t pid); | |
95 | void inf_validate_procs (struct inf *inf); | |
96 | void inf_steal_exc_ports (struct inf *inf); | |
97 | void inf_restore_exc_ports (struct inf *inf); | |
98 | struct proc *inf_tid_to_proc (struct inf *inf, int tid); | |
c5aa993b JM |
99 | inline void inf_set_threads_resume_sc (struct inf *inf, |
100 | struct proc *run_thread, | |
c906108c SS |
101 | int run_others); |
102 | inline int inf_set_threads_resume_sc_for_signal_thread (struct inf *inf); | |
103 | inline void inf_suspend (struct inf *inf); | |
104 | inline void inf_resume (struct inf *inf); | |
105 | void inf_set_step_thread (struct inf *inf, struct proc *proc); | |
106 | void inf_detach (struct inf *inf); | |
107 | void inf_attach (struct inf *inf, int pid); | |
108 | void inf_signal (struct inf *inf, enum target_signal sig); | |
cce74817 | 109 | void inf_continue (struct inf *inf); |
c906108c SS |
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 | ||
115 | void proc_abort (struct proc *proc, int force); | |
c906108c SS |
116 | struct proc *make_proc (struct inf *inf, mach_port_t port, int tid); |
117 | struct proc *_proc_free (struct proc *proc); | |
118 | int proc_update_sc (struct proc *proc); | |
c5aa993b | 119 | error_t proc_get_exception_port (struct proc *proc, mach_port_t * port); |
c906108c SS |
120 | error_t proc_set_exception_port (struct proc *proc, mach_port_t port); |
121 | static mach_port_t _proc_get_exc_port (struct proc *proc); | |
122 | void proc_steal_exc_port (struct proc *proc, mach_port_t exc_port); | |
123 | void proc_restore_exc_port (struct proc *proc); | |
124 | int proc_trace (struct proc *proc, int set); | |
c906108c SS |
125 | |
126 | /* Evaluate RPC_EXPR in a scope with the variables MSGPORT and REFPORT bound | |
127 | to INF's msg port and task port respectively. If it has no msg port, | |
128 | EIEIO is returned. INF must refer to a running process! */ | |
129 | #define INF_MSGPORT_RPC(inf, rpc_expr) \ | |
130 | HURD_MSGPORT_RPC (proc_getmsgport (proc_server, inf->pid, &msgport), \ | |
131 | (refport = inf->task->port, 0), 0, \ | |
132 | msgport ? (rpc_expr) : EIEIO) | |
133 | ||
134 | /* Like INF_MSGPORT_RPC, but will also resume the signal thread to ensure | |
135 | there's someone around to deal with the RPC (and resuspend things | |
136 | afterwards). This effects INF's threads' resume_sc count. */ | |
137 | #define INF_RESUME_MSGPORT_RPC(inf, rpc_expr) \ | |
138 | (inf_set_threads_resume_sc_for_signal_thread (inf) \ | |
139 | ? ({ error_t __e; \ | |
140 | inf_resume (inf); \ | |
141 | __e = INF_MSGPORT_RPC (inf, rpc_expr); \ | |
142 | inf_suspend (inf); \ | |
143 | __e; }) \ | |
144 | : EIEIO) | |
145 | ||
c906108c SS |
146 | \f |
147 | /* The state passed by an exception message. */ | |
148 | struct exc_state | |
c5aa993b JM |
149 | { |
150 | int exception; /* The exception code */ | |
151 | int code, subcode; | |
152 | mach_port_t handler; /* The real exception port to handle this. */ | |
153 | mach_port_t reply; /* The reply port from the exception call. */ | |
154 | }; | |
c906108c SS |
155 | |
156 | /* The results of the last wait an inf did. */ | |
157 | struct inf_wait | |
c5aa993b JM |
158 | { |
159 | struct target_waitstatus status; /* The status returned to gdb. */ | |
160 | struct exc_state exc; /* The exception that caused us to return. */ | |
161 | struct proc *thread; /* The thread in question. */ | |
162 | int suppress; /* Something trivial happened. */ | |
163 | }; | |
c906108c SS |
164 | |
165 | /* The state of an inferior. */ | |
166 | struct inf | |
c5aa993b JM |
167 | { |
168 | /* Fields describing the current inferior. */ | |
c906108c | 169 | |
c5aa993b JM |
170 | struct proc *task; /* The mach task. */ |
171 | struct proc *threads; /* A linked list of all threads in TASK. */ | |
c906108c | 172 | |
c5aa993b JM |
173 | /* True if THREADS needn't be validated by querying the task. We assume that |
174 | we and the task in question are the only ones frobbing the thread list, | |
175 | so as long as we don't let any code run, we don't have to worry about | |
176 | THREADS changing. */ | |
177 | int threads_up_to_date; | |
c906108c | 178 | |
c5aa993b | 179 | pid_t pid; /* The real system PID. */ |
c906108c | 180 | |
c5aa993b | 181 | struct inf_wait wait; /* What to return from target_wait. */ |
c906108c | 182 | |
c5aa993b JM |
183 | /* One thread proc in INF may be in `single-stepping mode'. This is it. */ |
184 | struct proc *step_thread; | |
c906108c | 185 | |
c5aa993b JM |
186 | /* The thread we think is the signal thread. */ |
187 | struct proc *signal_thread; | |
c906108c | 188 | |
c5aa993b | 189 | mach_port_t event_port; /* Where we receive various msgs. */ |
c906108c | 190 | |
c5aa993b JM |
191 | /* True if we think at least one thread in the inferior could currently be |
192 | running. */ | |
193 | unsigned int running:1; | |
c906108c | 194 | |
c5aa993b JM |
195 | /* True if the process has stopped (in the proc server sense). Note that |
196 | since a proc server `stop' leaves the signal thread running, the inf can | |
197 | be RUNNING && STOPPED... */ | |
198 | unsigned int stopped:1; | |
cce74817 | 199 | |
c5aa993b JM |
200 | /* True if the inferior has no message port. */ |
201 | unsigned int nomsg:1; | |
c906108c | 202 | |
c5aa993b JM |
203 | /* True if the inferior is traced. */ |
204 | unsigned int traced:1; | |
c906108c | 205 | |
c5aa993b JM |
206 | /* True if we shouldn't try waiting for the inferior, usually because we |
207 | can't for some reason. */ | |
208 | unsigned int no_wait:1; | |
c906108c | 209 | |
c5aa993b JM |
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; | |
c906108c | 214 | |
c5aa993b | 215 | /* Fields describing global state */ |
c906108c | 216 | |
c5aa993b JM |
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; | |
c906108c | 222 | |
c5aa993b JM |
223 | /* The task suspend count left when detaching from a task. */ |
224 | int detach_sc; | |
c906108c | 225 | |
c5aa993b JM |
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; | |
230 | int default_thread_detach_sc; | |
c906108c | 231 | |
c5aa993b JM |
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; | |
c906108c | 236 | |
c5aa993b JM |
237 | /* True if exceptions from the inferior process should be trapped. This |
238 | must be on to use breakpoints. */ | |
239 | int want_exceptions; | |
240 | }; | |
c906108c SS |
241 | |
242 | ||
c5aa993b JM |
243 | int |
244 | __proc_pid (struct proc *proc) | |
c906108c SS |
245 | { |
246 | return proc->inf->pid; | |
247 | } | |
942fd805 | 248 | |
c906108c SS |
249 | \f |
250 | /* Update PROC's real suspend count to match it's desired one. Returns true | |
251 | if we think PROC is now in a runnable state. */ | |
252 | int | |
253 | proc_update_sc (struct proc *proc) | |
254 | { | |
255 | int running; | |
c5aa993b | 256 | int err = 0; |
c906108c SS |
257 | int delta = proc->sc - proc->cur_sc; |
258 | ||
259 | if (delta) | |
260 | proc_debug (proc, "sc: %d --> %d", proc->cur_sc, proc->sc); | |
261 | ||
262 | if (proc->sc == 0 && proc->state_changed) | |
263 | /* Since PROC may start running, we must write back any state changes. */ | |
264 | { | |
bf62e5b4 | 265 | gdb_assert (proc_is_thread (proc)); |
c906108c SS |
266 | proc_debug (proc, "storing back changed thread state"); |
267 | err = thread_set_state (proc->port, THREAD_STATE_FLAVOR, | |
f75c77fc | 268 | (thread_state_t) &proc->state, THREAD_STATE_SIZE); |
c5aa993b | 269 | if (!err) |
c906108c SS |
270 | proc->state_changed = 0; |
271 | } | |
272 | ||
273 | if (delta > 0) | |
942fd805 MK |
274 | { |
275 | while (delta-- > 0 && !err) | |
276 | { | |
277 | if (proc_is_task (proc)) | |
278 | err = task_suspend (proc->port); | |
279 | else | |
280 | err = thread_suspend (proc->port); | |
281 | } | |
282 | } | |
c906108c | 283 | else |
942fd805 MK |
284 | { |
285 | while (delta++ < 0 && !err) | |
286 | { | |
287 | if (proc_is_task (proc)) | |
288 | err = task_resume (proc->port); | |
289 | else | |
290 | err = thread_resume (proc->port); | |
291 | } | |
292 | } | |
c5aa993b | 293 | if (!err) |
c906108c SS |
294 | proc->cur_sc = proc->sc; |
295 | ||
296 | /* If we got an error, then the task/thread has disappeared. */ | |
297 | running = !err && proc->sc == 0; | |
298 | ||
299 | proc_debug (proc, "is %s", err ? "dead" : running ? "running" : "suspended"); | |
300 | if (err) | |
301 | proc_debug (proc, "err = %s", strerror (err)); | |
302 | ||
303 | if (running) | |
304 | { | |
305 | proc->aborted = 0; | |
306 | proc->state_valid = proc->state_changed = 0; | |
307 | proc->fetched_regs = 0; | |
308 | } | |
309 | ||
310 | return running; | |
311 | } | |
942fd805 | 312 | |
c906108c SS |
313 | \f |
314 | /* Thread_abort is called on PROC if needed. PROC must be a thread proc. | |
315 | If PROC is deemed `precious', then nothing is done unless FORCE is true. | |
316 | In particular, a thread is precious if it's running (in which case forcing | |
317 | it includes suspending it first), or if it has an exception pending. */ | |
318 | void | |
319 | proc_abort (struct proc *proc, int force) | |
320 | { | |
bf62e5b4 | 321 | gdb_assert (proc_is_thread (proc)); |
c906108c | 322 | |
c5aa993b | 323 | if (!proc->aborted) |
c906108c SS |
324 | { |
325 | struct inf *inf = proc->inf; | |
326 | int running = (proc->cur_sc == 0 && inf->task->cur_sc == 0); | |
327 | ||
328 | if (running && force) | |
329 | { | |
330 | proc->sc = 1; | |
331 | inf_update_suspends (proc->inf); | |
332 | running = 0; | |
333 | warning ("Stopped %s.", proc_string (proc)); | |
334 | } | |
335 | else if (proc == inf->wait.thread && inf->wait.exc.reply && !force) | |
336 | /* An exception is pending on PROC, which don't mess with. */ | |
337 | running = 1; | |
338 | ||
c5aa993b | 339 | if (!running) |
c906108c SS |
340 | /* We only abort the thread if it's not actually running. */ |
341 | { | |
342 | thread_abort (proc->port); | |
343 | proc_debug (proc, "aborted"); | |
344 | proc->aborted = 1; | |
345 | } | |
346 | else | |
347 | proc_debug (proc, "not aborting"); | |
348 | } | |
349 | } | |
350 | ||
351 | /* Make sure that the state field in PROC is up to date, and return a pointer | |
352 | to it, or 0 if something is wrong. If WILL_MODIFY is true, makes sure | |
353 | that the thread is stopped and aborted first, and sets the state_changed | |
354 | field in PROC to true. */ | |
355 | thread_state_t | |
356 | proc_get_state (struct proc *proc, int will_modify) | |
357 | { | |
358 | int was_aborted = proc->aborted; | |
359 | ||
360 | proc_debug (proc, "updating state info%s", | |
361 | will_modify ? " (with intention to modify)" : ""); | |
362 | ||
363 | proc_abort (proc, will_modify); | |
364 | ||
c5aa993b | 365 | if (!was_aborted && proc->aborted) |
c906108c SS |
366 | /* PROC's state may have changed since we last fetched it. */ |
367 | proc->state_valid = 0; | |
368 | ||
c5aa993b | 369 | if (!proc->state_valid) |
c906108c SS |
370 | { |
371 | mach_msg_type_number_t state_size = THREAD_STATE_SIZE; | |
372 | error_t err = | |
c5aa993b | 373 | thread_get_state (proc->port, THREAD_STATE_FLAVOR, |
f75c77fc | 374 | (thread_state_t) &proc->state, &state_size); |
c906108c SS |
375 | proc_debug (proc, "getting thread state"); |
376 | proc->state_valid = !err; | |
377 | } | |
378 | ||
379 | if (proc->state_valid) | |
380 | { | |
381 | if (will_modify) | |
382 | proc->state_changed = 1; | |
f75c77fc | 383 | return (thread_state_t) &proc->state; |
c906108c SS |
384 | } |
385 | else | |
386 | return 0; | |
387 | } | |
942fd805 | 388 | |
c906108c SS |
389 | \f |
390 | /* Set PORT to PROC's exception port. */ | |
391 | error_t | |
c5aa993b | 392 | proc_get_exception_port (struct proc * proc, mach_port_t * port) |
c906108c SS |
393 | { |
394 | if (proc_is_task (proc)) | |
395 | return task_get_exception_port (proc->port, port); | |
396 | else | |
397 | return thread_get_exception_port (proc->port, port); | |
398 | } | |
399 | ||
400 | /* Set PROC's exception port to PORT. */ | |
401 | error_t | |
c5aa993b | 402 | proc_set_exception_port (struct proc * proc, mach_port_t port) |
c906108c SS |
403 | { |
404 | proc_debug (proc, "setting exception port: %d", port); | |
405 | if (proc_is_task (proc)) | |
406 | return task_set_exception_port (proc->port, port); | |
407 | else | |
408 | return thread_set_exception_port (proc->port, port); | |
409 | } | |
410 | ||
411 | /* Get PROC's exception port, cleaning up a bit if proc has died. */ | |
412 | static mach_port_t | |
413 | _proc_get_exc_port (struct proc *proc) | |
414 | { | |
415 | mach_port_t exc_port; | |
416 | error_t err = proc_get_exception_port (proc, &exc_port); | |
417 | ||
418 | if (err) | |
419 | /* PROC must be dead. */ | |
420 | { | |
421 | if (proc->exc_port) | |
422 | mach_port_deallocate (mach_task_self (), proc->exc_port); | |
423 | proc->exc_port = MACH_PORT_NULL; | |
424 | if (proc->saved_exc_port) | |
425 | mach_port_deallocate (mach_task_self (), proc->saved_exc_port); | |
426 | proc->saved_exc_port = MACH_PORT_NULL; | |
427 | } | |
428 | ||
429 | return exc_port; | |
430 | } | |
431 | ||
432 | /* Replace PROC's exception port with EXC_PORT, unless it's already been | |
433 | done. Stash away any existing exception port so we can restore it later. */ | |
434 | void | |
435 | proc_steal_exc_port (struct proc *proc, mach_port_t exc_port) | |
436 | { | |
437 | mach_port_t cur_exc_port = _proc_get_exc_port (proc); | |
438 | ||
439 | if (cur_exc_port) | |
440 | { | |
942fd805 | 441 | error_t err = 0; |
c906108c SS |
442 | |
443 | proc_debug (proc, "inserting exception port: %d", exc_port); | |
444 | ||
445 | if (cur_exc_port != exc_port) | |
446 | /* Put in our exception port. */ | |
447 | err = proc_set_exception_port (proc, exc_port); | |
448 | ||
449 | if (err || cur_exc_port == proc->exc_port) | |
450 | /* We previously set the exception port, and it's still set. So we | |
451 | just keep the old saved port which is what the proc set. */ | |
452 | { | |
453 | if (cur_exc_port) | |
454 | mach_port_deallocate (mach_task_self (), cur_exc_port); | |
455 | } | |
456 | else | |
457 | /* Keep a copy of PROC's old exception port so it can be restored. */ | |
458 | { | |
459 | if (proc->saved_exc_port) | |
460 | mach_port_deallocate (mach_task_self (), proc->saved_exc_port); | |
461 | proc->saved_exc_port = cur_exc_port; | |
462 | } | |
463 | ||
464 | proc_debug (proc, "saved exception port: %d", proc->saved_exc_port); | |
465 | ||
466 | if (!err) | |
467 | proc->exc_port = exc_port; | |
468 | else | |
469 | warning ("Error setting exception port for %s: %s", | |
470 | proc_string (proc), strerror (err)); | |
471 | } | |
472 | } | |
473 | ||
474 | /* If we previously replaced PROC's exception port, put back what we | |
475 | found there at the time, unless *our* exception port has since been | |
476 | overwritten, in which case who knows what's going on. */ | |
477 | void | |
478 | proc_restore_exc_port (struct proc *proc) | |
479 | { | |
480 | mach_port_t cur_exc_port = _proc_get_exc_port (proc); | |
481 | ||
482 | if (cur_exc_port) | |
483 | { | |
484 | error_t err = 0; | |
485 | ||
486 | proc_debug (proc, "restoring real exception port"); | |
487 | ||
488 | if (proc->exc_port == cur_exc_port) | |
489 | /* Our's is still there. */ | |
490 | err = proc_set_exception_port (proc, proc->saved_exc_port); | |
491 | ||
492 | if (proc->saved_exc_port) | |
493 | mach_port_deallocate (mach_task_self (), proc->saved_exc_port); | |
494 | proc->saved_exc_port = MACH_PORT_NULL; | |
495 | ||
496 | if (!err) | |
497 | proc->exc_port = MACH_PORT_NULL; | |
498 | else | |
499 | warning ("Error setting exception port for %s: %s", | |
500 | proc_string (proc), strerror (err)); | |
501 | } | |
502 | } | |
942fd805 | 503 | |
c906108c SS |
504 | \f |
505 | /* Turns hardware tracing in PROC on or off when SET is true or false, | |
506 | respectively. Returns true on success. */ | |
507 | int | |
508 | proc_trace (struct proc *proc, int set) | |
509 | { | |
510 | thread_state_t state = proc_get_state (proc, 1); | |
511 | ||
c5aa993b | 512 | if (!state) |
c906108c SS |
513 | return 0; /* the thread must be dead. */ |
514 | ||
515 | proc_debug (proc, "tracing %s", set ? "on" : "off"); | |
c5aa993b | 516 | |
c906108c SS |
517 | if (set) |
518 | { | |
519 | /* XXX We don't get the exception unless the thread has its own | |
c5aa993b | 520 | exception port???? */ |
c906108c SS |
521 | if (proc->exc_port == MACH_PORT_NULL) |
522 | proc_steal_exc_port (proc, proc->inf->event_port); | |
523 | THREAD_STATE_SET_TRACED (state); | |
524 | } | |
525 | else | |
526 | THREAD_STATE_CLEAR_TRACED (state); | |
527 | ||
528 | return 1; | |
529 | } | |
942fd805 | 530 | |
c906108c SS |
531 | \f |
532 | /* A variable from which to assign new TIDs. */ | |
533 | static int next_thread_id = 1; | |
534 | ||
535 | /* Returns a new proc structure with the given fields. Also adds a | |
536 | notification for PORT becoming dead to be sent to INF's notify port. */ | |
537 | struct proc * | |
538 | make_proc (struct inf *inf, mach_port_t port, int tid) | |
539 | { | |
540 | error_t err; | |
541 | mach_port_t prev_port = MACH_PORT_NULL; | |
3c37485b | 542 | struct proc *proc = xmalloc (sizeof (struct proc)); |
c906108c SS |
543 | |
544 | proc->port = port; | |
545 | proc->tid = tid; | |
546 | proc->inf = inf; | |
547 | proc->next = 0; | |
548 | proc->saved_exc_port = MACH_PORT_NULL; | |
549 | proc->exc_port = MACH_PORT_NULL; | |
550 | ||
551 | proc->sc = 0; | |
552 | proc->cur_sc = 0; | |
553 | ||
554 | /* Note that these are all the values for threads; the task simply uses the | |
555 | corresponding field in INF directly. */ | |
556 | proc->run_sc = inf->default_thread_run_sc; | |
557 | proc->pause_sc = inf->default_thread_pause_sc; | |
558 | proc->detach_sc = inf->default_thread_detach_sc; | |
559 | proc->resume_sc = proc->run_sc; | |
560 | ||
561 | proc->aborted = 0; | |
562 | proc->dead = 0; | |
563 | proc->state_valid = 0; | |
564 | proc->state_changed = 0; | |
565 | ||
566 | proc_debug (proc, "is new"); | |
567 | ||
568 | /* Get notified when things die. */ | |
569 | err = | |
c5aa993b | 570 | mach_port_request_notification (mach_task_self (), port, |
c906108c SS |
571 | MACH_NOTIFY_DEAD_NAME, 1, |
572 | inf->event_port, | |
573 | MACH_MSG_TYPE_MAKE_SEND_ONCE, | |
574 | &prev_port); | |
575 | if (err) | |
576 | warning ("Couldn't request notification for port %d: %s", | |
577 | port, strerror (err)); | |
578 | else | |
579 | { | |
580 | proc_debug (proc, "notifications to: %d", inf->event_port); | |
581 | if (prev_port != MACH_PORT_NULL) | |
582 | mach_port_deallocate (mach_task_self (), prev_port); | |
583 | } | |
584 | ||
585 | if (inf->want_exceptions) | |
942fd805 MK |
586 | { |
587 | if (proc_is_task (proc)) | |
588 | /* Make the task exception port point to us. */ | |
589 | proc_steal_exc_port (proc, inf->event_port); | |
590 | else | |
591 | /* Just clear thread exception ports -- they default to the | |
592 | task one. */ | |
593 | proc_steal_exc_port (proc, MACH_PORT_NULL); | |
594 | } | |
c906108c SS |
595 | |
596 | return proc; | |
597 | } | |
598 | ||
599 | /* Frees PROC and any resources it uses, and returns the value of PROC's | |
600 | next field. */ | |
601 | struct proc * | |
602 | _proc_free (struct proc *proc) | |
603 | { | |
604 | struct inf *inf = proc->inf; | |
605 | struct proc *next = proc->next; | |
606 | ||
607 | proc_debug (proc, "freeing..."); | |
608 | ||
609 | if (proc == inf->step_thread) | |
610 | /* Turn off single stepping. */ | |
611 | inf_set_step_thread (inf, 0); | |
612 | if (proc == inf->wait.thread) | |
613 | inf_clear_wait (inf); | |
614 | if (proc == inf->signal_thread) | |
615 | inf->signal_thread = 0; | |
616 | ||
617 | if (proc->port != MACH_PORT_NULL) | |
618 | { | |
619 | if (proc->exc_port != MACH_PORT_NULL) | |
620 | /* Restore the original exception port. */ | |
621 | proc_restore_exc_port (proc); | |
622 | if (proc->cur_sc != 0) | |
623 | /* Resume the thread/task. */ | |
624 | { | |
625 | proc->sc = 0; | |
626 | proc_update_sc (proc); | |
627 | } | |
628 | mach_port_deallocate (mach_task_self (), proc->port); | |
629 | } | |
630 | ||
b8c9b27d | 631 | xfree (proc); |
c906108c SS |
632 | return next; |
633 | } | |
942fd805 | 634 | |
c906108c | 635 | \f |
c5aa993b | 636 | struct inf * |
fba45db2 | 637 | make_inf (void) |
c906108c | 638 | { |
3c37485b | 639 | struct inf *inf = xmalloc (sizeof (struct inf)); |
c906108c SS |
640 | |
641 | inf->task = 0; | |
642 | inf->threads = 0; | |
643 | inf->threads_up_to_date = 0; | |
644 | inf->pid = 0; | |
645 | inf->wait.status.kind = TARGET_WAITKIND_SPURIOUS; | |
646 | inf->wait.thread = 0; | |
647 | inf->wait.exc.handler = MACH_PORT_NULL; | |
648 | inf->wait.exc.reply = MACH_PORT_NULL; | |
649 | inf->step_thread = 0; | |
650 | inf->signal_thread = 0; | |
651 | inf->event_port = MACH_PORT_NULL; | |
c906108c | 652 | inf->running = 0; |
cce74817 JM |
653 | inf->stopped = 0; |
654 | inf->nomsg = 1; | |
c906108c SS |
655 | inf->traced = 0; |
656 | inf->no_wait = 0; | |
657 | inf->pending_execs = 0; | |
658 | inf->pause_sc = 1; | |
659 | inf->detach_sc = 0; | |
660 | inf->default_thread_run_sc = 0; | |
661 | inf->default_thread_pause_sc = 0; | |
662 | inf->default_thread_detach_sc = 0; | |
663 | inf->want_signals = 1; /* By default */ | |
664 | inf->want_exceptions = 1; /* By default */ | |
665 | ||
666 | return inf; | |
667 | } | |
668 | ||
942fd805 | 669 | /* Clear INF's target wait status. */ |
c906108c SS |
670 | void |
671 | inf_clear_wait (struct inf *inf) | |
672 | { | |
673 | inf_debug (inf, "clearing wait"); | |
674 | inf->wait.status.kind = TARGET_WAITKIND_SPURIOUS; | |
675 | inf->wait.thread = 0; | |
676 | inf->wait.suppress = 0; | |
677 | if (inf->wait.exc.handler != MACH_PORT_NULL) | |
678 | { | |
679 | mach_port_deallocate (mach_task_self (), inf->wait.exc.handler); | |
680 | inf->wait.exc.handler = MACH_PORT_NULL; | |
681 | } | |
682 | if (inf->wait.exc.reply != MACH_PORT_NULL) | |
683 | { | |
684 | mach_port_deallocate (mach_task_self (), inf->wait.exc.reply); | |
685 | inf->wait.exc.reply = MACH_PORT_NULL; | |
686 | } | |
687 | } | |
942fd805 | 688 | |
c906108c SS |
689 | \f |
690 | void | |
691 | inf_cleanup (struct inf *inf) | |
692 | { | |
693 | inf_debug (inf, "cleanup"); | |
694 | ||
695 | inf_clear_wait (inf); | |
696 | ||
697 | inf_set_pid (inf, -1); | |
698 | inf->pid = 0; | |
cce74817 JM |
699 | inf->running = 0; |
700 | inf->stopped = 0; | |
701 | inf->nomsg = 1; | |
c906108c SS |
702 | inf->traced = 0; |
703 | inf->no_wait = 0; | |
c906108c SS |
704 | inf->pending_execs = 0; |
705 | ||
706 | if (inf->event_port) | |
707 | { | |
708 | mach_port_destroy (mach_task_self (), inf->event_port); | |
709 | inf->event_port = MACH_PORT_NULL; | |
710 | } | |
711 | } | |
712 | ||
713 | void | |
714 | inf_startup (struct inf *inf, int pid) | |
715 | { | |
716 | error_t err; | |
717 | ||
718 | inf_debug (inf, "startup: pid = %d", pid); | |
719 | ||
720 | inf_cleanup (inf); | |
721 | ||
722 | /* Make the port on which we receive all events. */ | |
723 | err = mach_port_allocate (mach_task_self (), | |
724 | MACH_PORT_RIGHT_RECEIVE, &inf->event_port); | |
725 | if (err) | |
726 | error ("Error allocating event port: %s", strerror (err)); | |
727 | ||
728 | /* Make a send right for it, so we can easily copy it for other people. */ | |
729 | mach_port_insert_right (mach_task_self (), inf->event_port, | |
730 | inf->event_port, MACH_MSG_TYPE_MAKE_SEND); | |
731 | inf_set_pid (inf, pid); | |
732 | } | |
942fd805 | 733 | |
c906108c | 734 | \f |
942fd805 | 735 | /* Close current process, if any, and attach INF to process PORT. */ |
c5aa993b | 736 | void |
c906108c SS |
737 | inf_set_pid (struct inf *inf, pid_t pid) |
738 | { | |
739 | task_t task_port; | |
740 | struct proc *task = inf->task; | |
741 | ||
742 | inf_debug (inf, "setting pid: %d", pid); | |
743 | ||
744 | if (pid < 0) | |
745 | task_port = MACH_PORT_NULL; | |
746 | else | |
747 | { | |
748 | error_t err = proc_pid2task (proc_server, pid, &task_port); | |
749 | if (err) | |
750 | error ("Error getting task for pid %d: %s", pid, strerror (err)); | |
751 | } | |
752 | ||
753 | inf_debug (inf, "setting task: %d", task_port); | |
754 | ||
755 | if (inf->pause_sc) | |
756 | task_suspend (task_port); | |
757 | ||
758 | if (task && task->port != task_port) | |
759 | { | |
760 | inf->task = 0; | |
761 | inf_validate_procs (inf); /* Trash all the threads. */ | |
762 | _proc_free (task); /* And the task. */ | |
763 | } | |
764 | ||
765 | if (task_port != MACH_PORT_NULL) | |
766 | { | |
767 | inf->task = make_proc (inf, task_port, PROC_TID_TASK); | |
768 | inf->threads_up_to_date = 0; | |
769 | } | |
770 | ||
771 | if (inf->task) | |
772 | { | |
773 | inf->pid = pid; | |
774 | if (inf->pause_sc) | |
942fd805 MK |
775 | /* Reflect task_suspend above. */ |
776 | inf->task->sc = inf->task->cur_sc = 1; | |
c906108c SS |
777 | } |
778 | else | |
779 | inf->pid = -1; | |
780 | } | |
942fd805 | 781 | |
c906108c | 782 | \f |
cce74817 JM |
783 | /* Validates INF's stopped, nomsg and traced field from the actual |
784 | proc server state. Note that the traced field is only updated from | |
785 | the proc server state if we do not have a message port. If we do | |
786 | have a message port we'd better look at the tracemask itself. */ | |
c906108c | 787 | static void |
cce74817 | 788 | inf_validate_procinfo (struct inf *inf) |
c906108c SS |
789 | { |
790 | char *noise; | |
791 | mach_msg_type_number_t noise_len = 0; | |
792 | struct procinfo *pi; | |
793 | mach_msg_type_number_t pi_len = 0; | |
794 | int info_flags = 0; | |
795 | error_t err = | |
c5aa993b | 796 | proc_getprocinfo (proc_server, inf->pid, &info_flags, |
f75c77fc | 797 | (procinfo_t *) &pi, &pi_len, &noise, &noise_len); |
c906108c | 798 | |
c5aa993b | 799 | if (!err) |
c906108c SS |
800 | { |
801 | inf->stopped = !!(pi->state & PI_STOPPED); | |
cce74817 JM |
802 | inf->nomsg = !!(pi->state & PI_NOMSG); |
803 | if (inf->nomsg) | |
804 | inf->traced = !!(pi->state & PI_TRACED); | |
c5aa993b | 805 | vm_deallocate (mach_task_self (), (vm_address_t) pi, pi_len); |
c906108c | 806 | if (noise_len > 0) |
c5aa993b | 807 | vm_deallocate (mach_task_self (), (vm_address_t) noise, noise_len); |
c906108c SS |
808 | } |
809 | } | |
810 | ||
f90b2b1d JK |
811 | /* Validates INF's task suspend count. If it's higher than we expect, |
812 | verify with the user before `stealing' the extra count. */ | |
c906108c SS |
813 | static void |
814 | inf_validate_task_sc (struct inf *inf) | |
815 | { | |
f90b2b1d JK |
816 | char *noise; |
817 | mach_msg_type_number_t noise_len = 0; | |
818 | struct procinfo *pi; | |
819 | mach_msg_type_number_t pi_len = 0; | |
820 | int info_flags = PI_FETCH_TASKINFO; | |
821 | int suspend_count = -1; | |
822 | error_t err; | |
c906108c | 823 | |
f90b2b1d JK |
824 | retry: |
825 | err = proc_getprocinfo (proc_server, inf->pid, &info_flags, | |
942fd805 | 826 | (procinfo_t *) &pi, &pi_len, &noise, &noise_len); |
c906108c | 827 | if (err) |
f90b2b1d JK |
828 | { |
829 | inf->task->dead = 1; /* oh well */ | |
830 | return; | |
831 | } | |
832 | ||
833 | if (inf->task->cur_sc < pi->taskinfo.suspend_count && suspend_count == -1) | |
834 | { | |
835 | /* The proc server might have suspended the task while stopping | |
836 | it. This happens when the task is handling a traced signal. | |
837 | Refetch the suspend count. The proc server should be | |
838 | finished stopping the task by now. */ | |
839 | suspend_count = pi->taskinfo.suspend_count; | |
840 | goto retry; | |
841 | } | |
842 | ||
843 | suspend_count = pi->taskinfo.suspend_count; | |
844 | ||
845 | vm_deallocate (mach_task_self (), (vm_address_t) pi, pi_len); | |
846 | if (noise_len > 0) | |
847 | vm_deallocate (mach_task_self (), (vm_address_t) pi, pi_len); | |
848 | ||
849 | if (inf->task->cur_sc < suspend_count) | |
c906108c SS |
850 | { |
851 | int abort; | |
852 | ||
853 | target_terminal_ours (); /* Allow I/O. */ | |
f90b2b1d JK |
854 | abort = !query ("Pid %d has an additional task suspend count of %d;" |
855 | " clear it? ", inf->pid, | |
856 | suspend_count - inf->task->cur_sc); | |
c5aa993b | 857 | target_terminal_inferior (); /* Give it back to the child. */ |
c906108c SS |
858 | |
859 | if (abort) | |
860 | error ("Additional task suspend count left untouched."); | |
861 | ||
f90b2b1d | 862 | inf->task->cur_sc = suspend_count; |
c906108c SS |
863 | } |
864 | } | |
865 | ||
942fd805 MK |
866 | /* Turns tracing for INF on or off, depending on ON, unless it already |
867 | is. If INF is running, the resume_sc count of INF's threads will | |
868 | be modified, and the signal thread will briefly be run to change | |
869 | the trace state. */ | |
c906108c SS |
870 | void |
871 | inf_set_traced (struct inf *inf, int on) | |
872 | { | |
942fd805 MK |
873 | if (on == inf->traced) |
874 | return; | |
875 | ||
876 | if (inf->task && !inf->task->dead) | |
877 | /* Make it take effect immediately. */ | |
878 | { | |
879 | sigset_t mask = on ? ~(sigset_t) 0 : 0; | |
880 | error_t err = | |
c5aa993b | 881 | INF_RESUME_MSGPORT_RPC (inf, msg_set_init_int (msgport, refport, |
942fd805 MK |
882 | INIT_TRACEMASK, mask)); |
883 | if (err == EIEIO) | |
884 | { | |
885 | if (on) | |
886 | warning ("Can't modify tracing state for pid %d: %s", | |
887 | inf->pid, "No signal thread"); | |
c906108c | 888 | inf->traced = on; |
942fd805 MK |
889 | } |
890 | else if (err) | |
891 | warning ("Can't modify tracing state for pid %d: %s", | |
892 | inf->pid, strerror (err)); | |
893 | else | |
894 | inf->traced = on; | |
895 | } | |
896 | else | |
897 | inf->traced = on; | |
c906108c | 898 | } |
942fd805 | 899 | |
c906108c | 900 | \f |
942fd805 MK |
901 | /* Makes all the real suspend count deltas of all the procs in INF |
902 | match the desired values. Careful to always do thread/task suspend | |
903 | counts in the safe order. Returns true if at least one thread is | |
904 | thought to be running. */ | |
c906108c SS |
905 | int |
906 | inf_update_suspends (struct inf *inf) | |
907 | { | |
908 | struct proc *task = inf->task; | |
909 | /* We don't have to update INF->threads even though we're iterating over it | |
910 | because we'll change a thread only if it already has an existing proc | |
911 | entry. */ | |
912 | ||
913 | inf_debug (inf, "updating suspend counts"); | |
914 | ||
915 | if (task) | |
916 | { | |
917 | struct proc *thread; | |
918 | int task_running = (task->sc == 0), thread_running = 0; | |
919 | ||
920 | if (task->sc > task->cur_sc) | |
921 | /* The task is becoming _more_ suspended; do before any threads. */ | |
922 | task_running = proc_update_sc (task); | |
923 | ||
924 | if (inf->pending_execs) | |
925 | /* When we're waiting for an exec, things may be happening behind our | |
926 | back, so be conservative. */ | |
927 | thread_running = 1; | |
928 | ||
929 | /* Do all the thread suspend counts. */ | |
930 | for (thread = inf->threads; thread; thread = thread->next) | |
931 | thread_running |= proc_update_sc (thread); | |
932 | ||
933 | if (task->sc != task->cur_sc) | |
934 | /* We didn't do the task first, because we wanted to wait for the | |
935 | threads; do it now. */ | |
936 | task_running = proc_update_sc (task); | |
937 | ||
938 | inf_debug (inf, "%srunning...", | |
939 | (thread_running && task_running) ? "" : "not "); | |
940 | ||
941 | inf->running = thread_running && task_running; | |
942 | ||
943 | /* Once any thread has executed some code, we can't depend on the | |
c5aa993b | 944 | threads list any more. */ |
c906108c SS |
945 | if (inf->running) |
946 | inf->threads_up_to_date = 0; | |
947 | ||
948 | return inf->running; | |
949 | } | |
950 | ||
951 | return 0; | |
952 | } | |
942fd805 | 953 | |
c906108c SS |
954 | \f |
955 | /* Converts a GDB pid to a struct proc. */ | |
956 | struct proc * | |
957 | inf_tid_to_thread (struct inf *inf, int tid) | |
958 | { | |
959 | struct proc *thread = inf->threads; | |
960 | ||
961 | while (thread) | |
962 | if (thread->tid == tid) | |
963 | return thread; | |
964 | else | |
965 | thread = thread->next; | |
966 | return 0; | |
967 | } | |
968 | ||
969 | /* Converts a thread port to a struct proc. */ | |
970 | struct proc * | |
971 | inf_port_to_thread (struct inf *inf, mach_port_t port) | |
972 | { | |
973 | struct proc *thread = inf->threads; | |
974 | while (thread) | |
975 | if (thread->port == port) | |
976 | return thread; | |
977 | else | |
978 | thread = thread->next; | |
979 | return 0; | |
980 | } | |
942fd805 | 981 | |
c906108c SS |
982 | \f |
983 | /* Make INF's list of threads be consistent with reality of TASK. */ | |
984 | void | |
985 | inf_validate_procs (struct inf *inf) | |
986 | { | |
c906108c | 987 | thread_array_t threads; |
942fd805 | 988 | mach_msg_type_number_t num_threads, i; |
c906108c SS |
989 | struct proc *task = inf->task; |
990 | ||
991 | /* If no threads are currently running, this function will guarantee that | |
992 | things are up to date. The exception is if there are zero threads -- | |
993 | then it is almost certainly in an odd state, and probably some outside | |
994 | agent will create threads. */ | |
995 | inf->threads_up_to_date = inf->threads ? !inf->running : 0; | |
996 | ||
997 | if (task) | |
998 | { | |
999 | error_t err = task_threads (task->port, &threads, &num_threads); | |
1000 | inf_debug (inf, "fetching threads"); | |
1001 | if (err) | |
1002 | /* TASK must be dead. */ | |
1003 | { | |
1004 | task->dead = 1; | |
1005 | task = 0; | |
1006 | } | |
1007 | } | |
1008 | ||
1009 | if (!task) | |
1010 | { | |
1011 | num_threads = 0; | |
1012 | inf_debug (inf, "no task"); | |
1013 | } | |
1014 | ||
1015 | { | |
942fd805 MK |
1016 | /* Make things normally linear. */ |
1017 | mach_msg_type_number_t search_start = 0; | |
c906108c SS |
1018 | /* Which thread in PROCS corresponds to each task thread, & the task. */ |
1019 | struct proc *matched[num_threads + 1]; | |
1020 | /* The last thread in INF->threads, so we can add to the end. */ | |
1021 | struct proc *last = 0; | |
1022 | /* The current thread we're considering. */ | |
1023 | struct proc *thread = inf->threads; | |
1024 | ||
1025 | bzero (matched, sizeof (matched)); | |
1026 | ||
1027 | while (thread) | |
1028 | { | |
942fd805 | 1029 | mach_msg_type_number_t left; |
c906108c SS |
1030 | |
1031 | for (i = search_start, left = num_threads; left; i++, left--) | |
1032 | { | |
1033 | if (i >= num_threads) | |
c5aa993b | 1034 | i -= num_threads; /* I wrapped around. */ |
c906108c SS |
1035 | if (thread->port == threads[i]) |
1036 | /* We already know about this thread. */ | |
1037 | { | |
1038 | matched[i] = thread; | |
1039 | last = thread; | |
1040 | thread = thread->next; | |
1041 | search_start++; | |
1042 | break; | |
1043 | } | |
1044 | } | |
1045 | ||
c5aa993b | 1046 | if (!left) |
c906108c SS |
1047 | { |
1048 | proc_debug (thread, "died!"); | |
1049 | thread->port = MACH_PORT_NULL; | |
c5aa993b | 1050 | thread = _proc_free (thread); /* THREAD is dead. */ |
c906108c SS |
1051 | (last ? last->next : inf->threads) = thread; |
1052 | } | |
1053 | } | |
1054 | ||
1055 | for (i = 0; i < num_threads; i++) | |
942fd805 MK |
1056 | { |
1057 | if (matched[i]) | |
1058 | /* Throw away the duplicate send right. */ | |
1059 | mach_port_deallocate (mach_task_self (), threads[i]); | |
1060 | else | |
1061 | /* THREADS[I] is a thread we don't know about yet! */ | |
1062 | { | |
1063 | thread = make_proc (inf, threads[i], next_thread_id++); | |
1064 | (last ? last->next : inf->threads) = thread; | |
1065 | last = thread; | |
1066 | proc_debug (thread, "new thread: %d", threads[i]); | |
1067 | add_thread (thread->tid); /* Tell GDB's generic thread code. */ | |
1068 | } | |
1069 | } | |
c906108c | 1070 | |
c5aa993b | 1071 | vm_deallocate (mach_task_self (), |
942fd805 | 1072 | (vm_address_t) threads, (num_threads * sizeof (thread_t))); |
c906108c SS |
1073 | } |
1074 | } | |
942fd805 | 1075 | |
c906108c SS |
1076 | \f |
1077 | /* Makes sure that INF's thread list is synced with the actual process. */ | |
1078 | inline int | |
1079 | inf_update_procs (struct inf *inf) | |
1080 | { | |
c5aa993b | 1081 | if (!inf->task) |
c906108c | 1082 | return 0; |
c5aa993b | 1083 | if (!inf->threads_up_to_date) |
c906108c SS |
1084 | inf_validate_procs (inf); |
1085 | return !!inf->task; | |
1086 | } | |
1087 | ||
1088 | /* Sets the resume_sc of each thread in inf. That of RUN_THREAD is set to 0, | |
1089 | and others are set to their run_sc if RUN_OTHERS is true, and otherwise | |
1090 | their pause_sc. */ | |
c5aa993b | 1091 | inline void |
c906108c SS |
1092 | inf_set_threads_resume_sc (struct inf *inf, |
1093 | struct proc *run_thread, int run_others) | |
1094 | { | |
1095 | struct proc *thread; | |
1096 | inf_update_procs (inf); | |
1097 | for (thread = inf->threads; thread; thread = thread->next) | |
1098 | if (thread == run_thread) | |
1099 | thread->resume_sc = 0; | |
1100 | else if (run_others) | |
1101 | thread->resume_sc = thread->run_sc; | |
1102 | else | |
1103 | thread->resume_sc = thread->pause_sc; | |
1104 | } | |
942fd805 | 1105 | |
c906108c SS |
1106 | \f |
1107 | /* Cause INF to continue execution immediately; individual threads may still | |
1108 | be suspended (but their suspend counts will be updated). */ | |
1109 | inline void | |
1110 | inf_resume (struct inf *inf) | |
1111 | { | |
1112 | struct proc *thread; | |
1113 | ||
1114 | inf_update_procs (inf); | |
1115 | ||
1116 | for (thread = inf->threads; thread; thread = thread->next) | |
1117 | thread->sc = thread->resume_sc; | |
1118 | ||
1119 | if (inf->task) | |
1120 | { | |
c5aa993b | 1121 | if (!inf->pending_execs) |
c906108c SS |
1122 | /* Try to make sure our task count is correct -- in the case where |
1123 | we're waiting for an exec though, things are too volatile, so just | |
1124 | assume things will be reasonable (which they usually will be). */ | |
1125 | inf_validate_task_sc (inf); | |
1126 | inf->task->sc = 0; | |
1127 | } | |
1128 | ||
1129 | inf_update_suspends (inf); | |
1130 | } | |
1131 | ||
1132 | /* Cause INF to stop execution immediately; individual threads may still | |
1133 | be running. */ | |
1134 | inline void | |
1135 | inf_suspend (struct inf *inf) | |
1136 | { | |
1137 | struct proc *thread; | |
1138 | ||
1139 | inf_update_procs (inf); | |
1140 | ||
1141 | for (thread = inf->threads; thread; thread = thread->next) | |
1142 | thread->sc = thread->pause_sc; | |
1143 | ||
1144 | if (inf->task) | |
1145 | inf->task->sc = inf->pause_sc; | |
1146 | ||
1147 | inf_update_suspends (inf); | |
1148 | } | |
942fd805 | 1149 | |
c906108c | 1150 | \f |
942fd805 MK |
1151 | /* INF has one thread PROC that is in single-stepping mode. This |
1152 | function changes it to be PROC, changing any old step_thread to be | |
1153 | a normal one. A PROC of 0 clears any existing value. */ | |
c906108c SS |
1154 | void |
1155 | inf_set_step_thread (struct inf *inf, struct proc *thread) | |
1156 | { | |
bf62e5b4 | 1157 | gdb_assert (!thread || proc_is_thread (thread)); |
c906108c SS |
1158 | |
1159 | if (thread) | |
1160 | inf_debug (inf, "setting step thread: %d/%d", inf->pid, thread->tid); | |
1161 | else | |
1162 | inf_debug (inf, "clearing step thread"); | |
1163 | ||
1164 | if (inf->step_thread != thread) | |
1165 | { | |
1166 | if (inf->step_thread && inf->step_thread->port != MACH_PORT_NULL) | |
c5aa993b | 1167 | if (!proc_trace (inf->step_thread, 0)) |
c906108c SS |
1168 | return; |
1169 | if (thread && proc_trace (thread, 1)) | |
1170 | inf->step_thread = thread; | |
1171 | else | |
1172 | inf->step_thread = 0; | |
1173 | } | |
1174 | } | |
942fd805 | 1175 | |
c906108c SS |
1176 | \f |
1177 | /* Set up the thread resume_sc's so that only the signal thread is running | |
1178 | (plus whatever other thread are set to always run). Returns true if we | |
1179 | did so, or false if we can't find a signal thread. */ | |
1180 | inline int | |
1181 | inf_set_threads_resume_sc_for_signal_thread (struct inf *inf) | |
1182 | { | |
1183 | if (inf->signal_thread) | |
1184 | { | |
1185 | inf_set_threads_resume_sc (inf, inf->signal_thread, 0); | |
1186 | return 1; | |
1187 | } | |
1188 | else | |
1189 | return 0; | |
1190 | } | |
1191 | ||
1192 | static void | |
1193 | inf_update_signal_thread (struct inf *inf) | |
1194 | { | |
1195 | /* XXX for now we assume that if there's a msgport, the 2nd thread is | |
1196 | the signal thread. */ | |
1197 | inf->signal_thread = inf->threads ? inf->threads->next : 0; | |
1198 | } | |
942fd805 | 1199 | |
c906108c SS |
1200 | \f |
1201 | /* Detachs from INF's inferior task, letting it run once again... */ | |
1202 | void | |
1203 | inf_detach (struct inf *inf) | |
1204 | { | |
1205 | struct proc *task = inf->task; | |
1206 | ||
1207 | inf_debug (inf, "detaching..."); | |
1208 | ||
1209 | inf_clear_wait (inf); | |
1210 | inf_set_step_thread (inf, 0); | |
1211 | ||
1212 | if (task) | |
1213 | { | |
1214 | struct proc *thread; | |
1215 | ||
cce74817 JM |
1216 | inf_validate_procinfo (inf); |
1217 | ||
c906108c SS |
1218 | inf_set_traced (inf, 0); |
1219 | if (inf->stopped) | |
cce74817 JM |
1220 | { |
1221 | if (inf->nomsg) | |
1222 | inf_continue (inf); | |
1223 | else | |
1224 | inf_signal (inf, TARGET_SIGNAL_0); | |
1225 | } | |
c906108c SS |
1226 | |
1227 | proc_restore_exc_port (task); | |
1228 | task->sc = inf->detach_sc; | |
1229 | ||
1230 | for (thread = inf->threads; thread; thread = thread->next) | |
1231 | { | |
1232 | proc_restore_exc_port (thread); | |
1233 | thread->sc = thread->detach_sc; | |
1234 | } | |
1235 | ||
1236 | inf_update_suspends (inf); | |
1237 | } | |
1238 | ||
1239 | inf_cleanup (inf); | |
1240 | } | |
1241 | ||
942fd805 MK |
1242 | /* Attaches INF to the process with process id PID, returning it in a |
1243 | suspended state suitable for debugging. */ | |
c906108c SS |
1244 | void |
1245 | inf_attach (struct inf *inf, int pid) | |
1246 | { | |
1247 | inf_debug (inf, "attaching: %d", pid); | |
1248 | ||
1249 | if (inf->pid) | |
1250 | inf_detach (inf); | |
1251 | ||
1252 | inf_startup (inf, pid); | |
1253 | } | |
942fd805 | 1254 | |
c906108c SS |
1255 | \f |
1256 | /* Makes sure that we've got our exception ports entrenched in the process. */ | |
c5aa993b JM |
1257 | void |
1258 | inf_steal_exc_ports (struct inf *inf) | |
c906108c SS |
1259 | { |
1260 | struct proc *thread; | |
1261 | ||
1262 | inf_debug (inf, "stealing exception ports"); | |
1263 | ||
1264 | inf_set_step_thread (inf, 0); /* The step thread is special. */ | |
1265 | ||
1266 | proc_steal_exc_port (inf->task, inf->event_port); | |
1267 | for (thread = inf->threads; thread; thread = thread->next) | |
1268 | proc_steal_exc_port (thread, MACH_PORT_NULL); | |
1269 | } | |
1270 | ||
1271 | /* Makes sure the process has its own exception ports. */ | |
c5aa993b JM |
1272 | void |
1273 | inf_restore_exc_ports (struct inf *inf) | |
c906108c SS |
1274 | { |
1275 | struct proc *thread; | |
1276 | ||
1277 | inf_debug (inf, "restoring exception ports"); | |
1278 | ||
1279 | inf_set_step_thread (inf, 0); /* The step thread is special. */ | |
1280 | ||
1281 | proc_restore_exc_port (inf->task); | |
1282 | for (thread = inf->threads; thread; thread = thread->next) | |
1283 | proc_restore_exc_port (thread); | |
1284 | } | |
942fd805 | 1285 | |
c906108c SS |
1286 | \f |
1287 | /* Deliver signal SIG to INF. If INF is stopped, delivering a signal, even | |
1288 | signal 0, will continue it. INF is assumed to be in a paused state, and | |
1289 | the resume_sc's of INF's threads may be affected. */ | |
1290 | void | |
1291 | inf_signal (struct inf *inf, enum target_signal sig) | |
1292 | { | |
1293 | error_t err = 0; | |
1294 | int host_sig = target_signal_to_host (sig); | |
1295 | ||
1296 | #define NAME target_signal_to_name (sig) | |
1297 | ||
1298 | if (host_sig >= _NSIG) | |
1299 | /* A mach exception. Exceptions are encoded in the signal space by | |
1300 | putting them after _NSIG; this assumes they're positive (and not | |
1301 | extremely large)! */ | |
1302 | { | |
1303 | struct inf_wait *w = &inf->wait; | |
1304 | if (w->status.kind == TARGET_WAITKIND_STOPPED | |
1305 | && w->status.value.sig == sig | |
1306 | && w->thread && !w->thread->aborted) | |
1307 | /* We're passing through the last exception we received. This is | |
1308 | kind of bogus, because exceptions are per-thread whereas gdb | |
1309 | treats signals as per-process. We just forward the exception to | |
1310 | the correct handler, even it's not for the same thread as TID -- | |
1311 | i.e., we pretend it's global. */ | |
1312 | { | |
1313 | struct exc_state *e = &w->exc; | |
1314 | inf_debug (inf, "passing through exception:" | |
1315 | " task = %d, thread = %d, exc = %d" | |
1316 | ", code = %d, subcode = %d", | |
1317 | w->thread->port, inf->task->port, | |
1318 | e->exception, e->code, e->subcode); | |
1319 | err = | |
1320 | exception_raise_request (e->handler, | |
1321 | e->reply, MACH_MSG_TYPE_MOVE_SEND_ONCE, | |
1322 | w->thread->port, inf->task->port, | |
1323 | e->exception, e->code, e->subcode); | |
1324 | } | |
1325 | else | |
1326 | error ("Can't forward spontaneous exception (%s).", NAME); | |
1327 | } | |
1328 | else | |
1329 | /* A Unix signal. */ | |
c5aa993b JM |
1330 | if (inf->stopped) |
1331 | /* The process is stopped and expecting a signal. Just send off a | |
1332 | request and let it get handled when we resume everything. */ | |
1333 | { | |
1334 | inf_debug (inf, "sending %s to stopped process", NAME); | |
1335 | err = | |
1336 | INF_MSGPORT_RPC (inf, | |
1337 | msg_sig_post_untraced_request (msgport, | |
1338 | inf->event_port, | |
1339 | MACH_MSG_TYPE_MAKE_SEND_ONCE, | |
1340 | host_sig, 0, | |
1341 | refport)); | |
1342 | if (!err) | |
1343 | /* Posting an untraced signal automatically continues it. | |
1344 | We clear this here rather than when we get the reply | |
1345 | because we'd rather assume it's not stopped when it | |
1346 | actually is, than the reverse. */ | |
1347 | inf->stopped = 0; | |
1348 | } | |
1349 | else | |
1350 | /* It's not expecting it. We have to let just the signal thread | |
1351 | run, and wait for it to get into a reasonable state before we | |
1352 | can continue the rest of the process. When we finally resume the | |
1353 | process the signal we request will be the very first thing that | |
1354 | happens. */ | |
1355 | { | |
942fd805 MK |
1356 | inf_debug (inf, "sending %s to unstopped process" |
1357 | " (so resuming signal thread)", NAME); | |
c5aa993b | 1358 | err = |
942fd805 MK |
1359 | INF_RESUME_MSGPORT_RPC (inf, |
1360 | msg_sig_post_untraced (msgport, host_sig, | |
1361 | 0, refport)); | |
c5aa993b | 1362 | } |
c906108c SS |
1363 | |
1364 | if (err == EIEIO) | |
1365 | /* Can't do too much... */ | |
1366 | warning ("Can't deliver signal %s: No signal thread.", NAME); | |
1367 | else if (err) | |
1368 | warning ("Delivering signal %s: %s", NAME, strerror (err)); | |
1369 | ||
1370 | #undef NAME | |
1371 | } | |
942fd805 | 1372 | |
c906108c | 1373 | \f |
cce74817 JM |
1374 | /* Continue INF without delivering a signal. This is meant to be used |
1375 | when INF does not have a message port. */ | |
1376 | void | |
1377 | inf_continue (struct inf *inf) | |
1378 | { | |
1379 | process_t proc; | |
1380 | error_t err = proc_pid2proc (proc_server, inf->pid, &proc); | |
1381 | ||
c5aa993b | 1382 | if (!err) |
cce74817 JM |
1383 | { |
1384 | inf_debug (inf, "continuing process"); | |
1385 | ||
1386 | err = proc_mark_cont (proc); | |
c5aa993b | 1387 | if (!err) |
cce74817 JM |
1388 | { |
1389 | struct proc *thread; | |
1390 | ||
1391 | for (thread = inf->threads; thread; thread = thread->next) | |
1392 | thread_resume (thread->port); | |
c5aa993b | 1393 | |
cce74817 JM |
1394 | inf->stopped = 0; |
1395 | } | |
1396 | } | |
1397 | ||
1398 | if (err) | |
1399 | warning ("Can't continue process: %s", strerror (err)); | |
1400 | } | |
942fd805 | 1401 | |
cce74817 | 1402 | \f |
c906108c SS |
1403 | /* The inferior used for all gdb target ops. */ |
1404 | struct inf *current_inferior = 0; | |
1405 | ||
1406 | /* The inferior being waited for by gnu_wait. Since GDB is decidely not | |
1407 | multi-threaded, we don't bother to lock this. */ | |
1408 | struct inf *waiting_inf; | |
1409 | ||
1410 | /* Wait for something to happen in the inferior, returning what in STATUS. */ | |
1411 | static int | |
1412 | gnu_wait (int tid, struct target_waitstatus *status) | |
1413 | { | |
c5aa993b JM |
1414 | struct msg |
1415 | { | |
1416 | mach_msg_header_t hdr; | |
1417 | mach_msg_type_t type; | |
1418 | int data[8000]; | |
942fd805 | 1419 | } msg; |
c906108c SS |
1420 | error_t err; |
1421 | struct proc *thread; | |
1422 | struct inf *inf = current_inferior; | |
1423 | ||
942fd805 MK |
1424 | extern int exc_server (mach_msg_header_t *, mach_msg_header_t *); |
1425 | extern int msg_reply_server (mach_msg_header_t *, mach_msg_header_t *); | |
1426 | extern int notify_server (mach_msg_header_t *, mach_msg_header_t *); | |
1427 | extern int process_reply_server (mach_msg_header_t *, mach_msg_header_t *); | |
1428 | ||
bf62e5b4 | 1429 | gdb_assert (inf->task); |
c906108c SS |
1430 | |
1431 | if (!inf->threads && !inf->pending_execs) | |
1432 | /* No threads! Assume that maybe some outside agency is frobbing our | |
1433 | task, and really look for new threads. If we can't find any, just tell | |
1434 | the user to try again later. */ | |
1435 | { | |
1436 | inf_validate_procs (inf); | |
1437 | if (!inf->threads && !inf->task->dead) | |
1438 | error ("There are no threads; try again later."); | |
1439 | } | |
1440 | ||
1441 | waiting_inf = inf; | |
1442 | ||
1443 | inf_debug (inf, "waiting for: %d", tid); | |
1444 | ||
c5aa993b | 1445 | rewait: |
c906108c SS |
1446 | if (proc_wait_pid != inf->pid && !inf->no_wait) |
1447 | /* Always get information on events from the proc server. */ | |
1448 | { | |
1449 | inf_debug (inf, "requesting wait on pid %d", inf->pid); | |
1450 | ||
1451 | if (proc_wait_pid) | |
1452 | /* The proc server is single-threaded, and only allows a single | |
1453 | outstanding wait request, so we have to cancel the previous one. */ | |
1454 | { | |
1455 | inf_debug (inf, "cancelling previous wait on pid %d", proc_wait_pid); | |
1456 | interrupt_operation (proc_server, 0); | |
1457 | } | |
1458 | ||
1459 | err = | |
1460 | proc_wait_request (proc_server, inf->event_port, inf->pid, WUNTRACED); | |
1461 | if (err) | |
1462 | warning ("wait request failed: %s", strerror (err)); | |
1463 | else | |
1464 | { | |
1465 | inf_debug (inf, "waits pending: %d", proc_waits_pending); | |
1466 | proc_wait_pid = inf->pid; | |
942fd805 MK |
1467 | /* Even if proc_waits_pending was > 0 before, we still won't |
1468 | get any other replies, because it was either from a | |
1469 | different INF, or a different process attached to INF -- | |
1470 | and the event port, which is the wait reply port, changes | |
1471 | when you switch processes. */ | |
c906108c SS |
1472 | proc_waits_pending = 1; |
1473 | } | |
1474 | } | |
1475 | ||
1476 | inf_clear_wait (inf); | |
1477 | ||
1478 | /* What can happen? (1) Dead name notification; (2) Exceptions arrive; | |
1479 | (3) wait reply from the proc server. */ | |
1480 | ||
1481 | inf_debug (inf, "waiting for an event..."); | |
1482 | err = mach_msg (&msg.hdr, MACH_RCV_MSG | MACH_RCV_INTERRUPT, | |
1483 | 0, sizeof (struct msg), inf->event_port, | |
1484 | MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL); | |
1485 | ||
1486 | /* Re-suspend the task. */ | |
1487 | inf_suspend (inf); | |
1488 | ||
1489 | if (!inf->task && inf->pending_execs) | |
1490 | /* When doing an exec, it's possible that the old task wasn't reused | |
1491 | (e.g., setuid execs). So if the task seems to have disappeared, | |
1492 | attempt to refetch it, as the pid should still be the same. */ | |
1493 | inf_set_pid (inf, inf->pid); | |
1494 | ||
1495 | if (err == EMACH_RCV_INTERRUPTED) | |
1496 | inf_debug (inf, "interrupted"); | |
1497 | else if (err) | |
1498 | error ("Couldn't wait for an event: %s", strerror (err)); | |
1499 | else | |
1500 | { | |
c5aa993b JM |
1501 | struct |
1502 | { | |
1503 | mach_msg_header_t hdr; | |
1504 | mach_msg_type_t err_type; | |
1505 | kern_return_t err; | |
1506 | char noise[200]; | |
1507 | } | |
1508 | reply; | |
c906108c SS |
1509 | |
1510 | inf_debug (inf, "event: msgid = %d", msg.hdr.msgh_id); | |
1511 | ||
1512 | /* Handle what we got. */ | |
c5aa993b JM |
1513 | if (!notify_server (&msg.hdr, &reply.hdr) |
1514 | && !exc_server (&msg.hdr, &reply.hdr) | |
1515 | && !process_reply_server (&msg.hdr, &reply.hdr) | |
1516 | && !msg_reply_server (&msg.hdr, &reply.hdr)) | |
c906108c SS |
1517 | /* Whatever it is, it's something strange. */ |
1518 | error ("Got a strange event, msg id = %d.", msg.hdr.msgh_id); | |
1519 | ||
1520 | if (reply.err) | |
1521 | error ("Handling event, msgid = %d: %s", | |
1522 | msg.hdr.msgh_id, strerror (reply.err)); | |
1523 | } | |
1524 | ||
1525 | if (inf->pending_execs) | |
1526 | /* We're waiting for the inferior to finish execing. */ | |
1527 | { | |
1528 | struct inf_wait *w = &inf->wait; | |
1529 | enum target_waitkind kind = w->status.kind; | |
1530 | ||
1531 | if (kind == TARGET_WAITKIND_SPURIOUS) | |
1532 | /* Since gdb is actually counting the number of times the inferior | |
1533 | stops, expecting one stop per exec, we only return major events | |
1534 | while execing. */ | |
1535 | { | |
1536 | w->suppress = 1; | |
1537 | inf_debug (inf, "pending_execs = %d, ignoring minor event", | |
1538 | inf->pending_execs); | |
1539 | } | |
1540 | else if (kind == TARGET_WAITKIND_STOPPED | |
1541 | && w->status.value.sig == TARGET_SIGNAL_TRAP) | |
1542 | /* Ah hah! A SIGTRAP from the inferior while starting up probably | |
1543 | means we've succesfully completed an exec! */ | |
1544 | { | |
1545 | if (--inf->pending_execs == 0) | |
1546 | /* We're done! */ | |
1547 | { | |
c5aa993b | 1548 | #if 0 /* do we need this? */ |
c906108c | 1549 | prune_threads (1); /* Get rid of the old shell threads */ |
c5aa993b | 1550 | renumber_threads (0); /* Give our threads reasonable names. */ |
c906108c SS |
1551 | #endif |
1552 | } | |
1553 | inf_debug (inf, "pending exec completed, pending_execs => %d", | |
1554 | inf->pending_execs); | |
1555 | } | |
1556 | else if (kind == TARGET_WAITKIND_STOPPED) | |
1557 | /* It's possible that this signal is because of a crashed process | |
1558 | being handled by the hurd crash server; in this case, the process | |
1559 | will have an extra task suspend, which we need to know about. | |
1560 | Since the code in inf_resume that normally checks for this is | |
1561 | disabled while INF->pending_execs, we do the check here instead. */ | |
1562 | inf_validate_task_sc (inf); | |
1563 | } | |
1564 | ||
1565 | if (inf->wait.suppress) | |
1566 | /* Some totally spurious event happened that we don't consider | |
1567 | worth returning to gdb. Just keep waiting. */ | |
1568 | { | |
1569 | inf_debug (inf, "suppressing return, rewaiting..."); | |
1570 | inf_resume (inf); | |
1571 | goto rewait; | |
1572 | } | |
1573 | ||
1574 | /* Pass back out our results. */ | |
1575 | bcopy (&inf->wait.status, status, sizeof (*status)); | |
1576 | ||
1577 | thread = inf->wait.thread; | |
1578 | if (thread) | |
1579 | tid = thread->tid; | |
1580 | else | |
1581 | thread = inf_tid_to_thread (inf, tid); | |
1582 | ||
1583 | if (!thread || thread->port == MACH_PORT_NULL) | |
942fd805 MK |
1584 | { |
1585 | /* TID is dead; try and find a new thread. */ | |
1586 | if (inf_update_procs (inf) && inf->threads) | |
1587 | tid = inf->threads->tid; /* The first available thread. */ | |
1588 | else | |
1589 | tid = inferior_pid; /* let wait_for_inferior handle exit case */ | |
1590 | } | |
c906108c SS |
1591 | |
1592 | if (thread && tid >= 0 && status->kind != TARGET_WAITKIND_SPURIOUS | |
1593 | && inf->pause_sc == 0 && thread->pause_sc == 0) | |
942fd805 MK |
1594 | /* If something actually happened to THREAD, make sure we |
1595 | suspend it. */ | |
c906108c SS |
1596 | { |
1597 | thread->sc = 1; | |
1598 | inf_update_suspends (inf); | |
c5aa993b | 1599 | } |
c906108c SS |
1600 | |
1601 | inf_debug (inf, "returning tid = %d, status = %s (%d)", tid, | |
1602 | status->kind == TARGET_WAITKIND_EXITED ? "EXITED" | |
1603 | : status->kind == TARGET_WAITKIND_STOPPED ? "STOPPED" | |
1604 | : status->kind == TARGET_WAITKIND_SIGNALLED ? "SIGNALLED" | |
1605 | : status->kind == TARGET_WAITKIND_LOADED ? "LOADED" | |
1606 | : status->kind == TARGET_WAITKIND_SPURIOUS ? "SPURIOUS" | |
1607 | : "?", | |
1608 | status->value.integer); | |
1609 | ||
1610 | return tid; | |
1611 | } | |
942fd805 | 1612 | |
c906108c SS |
1613 | \f |
1614 | /* The rpc handler called by exc_server. */ | |
1615 | error_t | |
1616 | S_exception_raise_request (mach_port_t port, mach_port_t reply_port, | |
1617 | thread_t thread_port, task_t task_port, | |
1618 | int exception, int code, int subcode) | |
1619 | { | |
1620 | struct inf *inf = waiting_inf; | |
1621 | struct proc *thread = inf_port_to_thread (inf, thread_port); | |
1622 | ||
1623 | inf_debug (waiting_inf, | |
1624 | "thread = %d, task = %d, exc = %d, code = %d, subcode = %d", | |
942fd805 | 1625 | thread_port, task_port, exception, code, subcode); |
c906108c SS |
1626 | |
1627 | if (!thread) | |
1628 | /* We don't know about thread? */ | |
1629 | { | |
1630 | inf_update_procs (inf); | |
1631 | thread = inf_port_to_thread (inf, thread_port); | |
1632 | if (!thread) | |
1633 | /* Give up, the generating thread is gone. */ | |
1634 | return 0; | |
1635 | } | |
1636 | ||
1637 | mach_port_deallocate (mach_task_self (), thread_port); | |
1638 | mach_port_deallocate (mach_task_self (), task_port); | |
1639 | ||
c5aa993b | 1640 | if (!thread->aborted) |
c906108c SS |
1641 | /* THREAD hasn't been aborted since this exception happened (abortion |
1642 | clears any exception state), so it must be real. */ | |
1643 | { | |
1644 | /* Store away the details; this will destroy any previous info. */ | |
1645 | inf->wait.thread = thread; | |
1646 | ||
1647 | inf->wait.status.kind = TARGET_WAITKIND_STOPPED; | |
1648 | ||
1649 | if (exception == EXC_BREAKPOINT) | |
1650 | /* GDB likes to get SIGTRAP for breakpoints. */ | |
1651 | { | |
1652 | inf->wait.status.value.sig = TARGET_SIGNAL_TRAP; | |
1653 | mach_port_deallocate (mach_task_self (), reply_port); | |
1654 | } | |
1655 | else | |
1656 | /* Record the exception so that we can forward it later. */ | |
1657 | { | |
1658 | if (thread->exc_port == port) | |
1659 | { | |
8e1a459b | 1660 | inf_debug (waiting_inf, "Handler is thread exception port <%d>", |
c906108c SS |
1661 | thread->saved_exc_port); |
1662 | inf->wait.exc.handler = thread->saved_exc_port; | |
1663 | } | |
1664 | else | |
1665 | { | |
8e1a459b | 1666 | inf_debug (waiting_inf, "Handler is task exception port <%d>", |
c906108c SS |
1667 | inf->task->saved_exc_port); |
1668 | inf->wait.exc.handler = inf->task->saved_exc_port; | |
bf62e5b4 | 1669 | gdb_assert (inf->task->exc_port == port); |
c906108c SS |
1670 | } |
1671 | if (inf->wait.exc.handler != MACH_PORT_NULL) | |
1672 | /* Add a reference to the exception handler. */ | |
1673 | mach_port_mod_refs (mach_task_self (), | |
1674 | inf->wait.exc.handler, MACH_PORT_RIGHT_SEND, | |
1675 | 1); | |
1676 | ||
1677 | inf->wait.exc.exception = exception; | |
1678 | inf->wait.exc.code = code; | |
1679 | inf->wait.exc.subcode = subcode; | |
1680 | inf->wait.exc.reply = reply_port; | |
1681 | ||
1682 | /* Exceptions are encoded in the signal space by putting them after | |
1683 | _NSIG; this assumes they're positive (and not extremely large)! */ | |
1684 | inf->wait.status.value.sig = | |
1685 | target_signal_from_host (_NSIG + exception); | |
1686 | } | |
1687 | } | |
1688 | else | |
1689 | /* A supppressed exception, which ignore. */ | |
1690 | { | |
1691 | inf->wait.suppress = 1; | |
1692 | mach_port_deallocate (mach_task_self (), reply_port); | |
1693 | } | |
1694 | ||
1695 | return 0; | |
1696 | } | |
942fd805 | 1697 | |
c906108c SS |
1698 | \f |
1699 | /* Fill in INF's wait field after a task has died without giving us more | |
1700 | detailed information. */ | |
1701 | void | |
1702 | inf_task_died_status (struct inf *inf) | |
1703 | { | |
1704 | warning ("Pid %d died with unknown exit status, using SIGKILL.", inf->pid); | |
1705 | inf->wait.status.kind = TARGET_WAITKIND_SIGNALLED; | |
1706 | inf->wait.status.value.sig = TARGET_SIGNAL_KILL; | |
1707 | } | |
1708 | ||
1709 | /* Notify server routines. The only real one is dead name notification. */ | |
1710 | error_t | |
1711 | do_mach_notify_dead_name (mach_port_t notify, mach_port_t dead_port) | |
1712 | { | |
1713 | struct inf *inf = waiting_inf; | |
1714 | ||
1715 | inf_debug (waiting_inf, "port = %d", dead_port); | |
1716 | ||
1717 | if (inf->task && inf->task->port == dead_port) | |
1718 | { | |
1719 | proc_debug (inf->task, "is dead"); | |
1720 | inf->task->port = MACH_PORT_NULL; | |
1721 | if (proc_wait_pid == inf->pid) | |
1722 | /* We have a wait outstanding on the process, which will return more | |
1723 | detailed information, so delay until we get that. */ | |
1724 | inf->wait.suppress = 1; | |
1725 | else | |
1726 | /* We never waited for the process (maybe it wasn't a child), so just | |
1727 | pretend it got a SIGKILL. */ | |
1728 | inf_task_died_status (inf); | |
1729 | } | |
1730 | else | |
1731 | { | |
1732 | struct proc *thread = inf_port_to_thread (inf, dead_port); | |
1733 | if (thread) | |
1734 | { | |
1735 | proc_debug (thread, "is dead"); | |
1736 | thread->port = MACH_PORT_NULL; | |
1737 | } | |
f90b2b1d JK |
1738 | |
1739 | if (inf->task->dead) | |
1740 | /* Since the task is dead, its threads are dying with it. */ | |
1741 | inf->wait.suppress = 1; | |
c906108c SS |
1742 | } |
1743 | ||
1744 | mach_port_deallocate (mach_task_self (), dead_port); | |
c5aa993b | 1745 | inf->threads_up_to_date = 0; /* Just in case */ |
c906108c SS |
1746 | |
1747 | return 0; | |
1748 | } | |
942fd805 | 1749 | |
c906108c SS |
1750 | \f |
1751 | static error_t | |
1752 | ill_rpc (char *fun) | |
1753 | { | |
1754 | warning ("illegal rpc: %s", fun); | |
1755 | return 0; | |
1756 | } | |
1757 | ||
1758 | error_t | |
1759 | do_mach_notify_no_senders (mach_port_t notify, mach_port_mscount_t count) | |
1760 | { | |
1761 | return ill_rpc (__FUNCTION__); | |
1762 | } | |
1763 | ||
1764 | error_t | |
1765 | do_mach_notify_port_deleted (mach_port_t notify, mach_port_t name) | |
1766 | { | |
1767 | return ill_rpc (__FUNCTION__); | |
1768 | } | |
1769 | ||
1770 | error_t | |
1771 | do_mach_notify_msg_accepted (mach_port_t notify, mach_port_t name) | |
1772 | { | |
1773 | return ill_rpc (__FUNCTION__); | |
1774 | } | |
1775 | ||
1776 | error_t | |
1777 | do_mach_notify_port_destroyed (mach_port_t notify, mach_port_t name) | |
1778 | { | |
1779 | return ill_rpc (__FUNCTION__); | |
1780 | } | |
1781 | ||
1782 | error_t | |
1783 | do_mach_notify_send_once (mach_port_t notify) | |
1784 | { | |
1785 | return ill_rpc (__FUNCTION__); | |
1786 | } | |
942fd805 | 1787 | |
c906108c SS |
1788 | \f |
1789 | /* Process_reply server routines. We only use process_wait_reply. */ | |
1790 | ||
1791 | error_t | |
1792 | S_proc_wait_reply (mach_port_t reply, error_t err, | |
1793 | int status, int sigcode, rusage_t rusage, pid_t pid) | |
1794 | { | |
1795 | struct inf *inf = waiting_inf; | |
1796 | ||
1797 | inf_debug (inf, "err = %s, pid = %d, status = 0x%x, sigcode = %d", | |
1798 | err ? strerror (err) : "0", pid, status, sigcode); | |
1799 | ||
1800 | if (err && proc_wait_pid && (!inf->task || !inf->task->port)) | |
1801 | /* Ack. The task has died, but the task-died notification code didn't | |
1802 | tell anyone because it thought a more detailed reply from the | |
1803 | procserver was forthcoming. However, we now learn that won't | |
1804 | happen... So we have to act like the task just died, and this time, | |
1805 | tell the world. */ | |
1806 | inf_task_died_status (inf); | |
1807 | ||
1808 | if (--proc_waits_pending == 0) | |
1809 | /* PROC_WAIT_PID represents the most recent wait. We will always get | |
1810 | replies in order because the proc server is single threaded. */ | |
1811 | proc_wait_pid = 0; | |
1812 | ||
1813 | inf_debug (inf, "waits pending now: %d", proc_waits_pending); | |
1814 | ||
1815 | if (err) | |
1816 | { | |
1817 | if (err != EINTR) | |
1818 | { | |
1819 | warning ("Can't wait for pid %d: %s", inf->pid, strerror (err)); | |
1820 | inf->no_wait = 1; | |
1821 | ||
1822 | /* Since we can't see the inferior's signals, don't trap them. */ | |
1823 | inf_set_traced (inf, 0); | |
1824 | } | |
1825 | } | |
1826 | else if (pid == inf->pid) | |
1827 | { | |
1828 | store_waitstatus (&inf->wait.status, status); | |
1829 | if (inf->wait.status.kind == TARGET_WAITKIND_STOPPED) | |
1830 | /* The process has sent us a signal, and stopped itself in a sane | |
1831 | state pending our actions. */ | |
1832 | { | |
1833 | inf_debug (inf, "process has stopped itself"); | |
1834 | inf->stopped = 1; | |
1835 | } | |
1836 | } | |
1837 | else | |
1838 | inf->wait.suppress = 1; /* Something odd happened. Ignore. */ | |
1839 | ||
1840 | return 0; | |
1841 | } | |
1842 | ||
1843 | error_t | |
1844 | S_proc_setmsgport_reply (mach_port_t reply, error_t err, | |
1845 | mach_port_t old_msg_port) | |
1846 | { | |
1847 | return ill_rpc (__FUNCTION__); | |
1848 | } | |
1849 | ||
1850 | error_t | |
1851 | S_proc_getmsgport_reply (mach_port_t reply, error_t err, mach_port_t msg_port) | |
1852 | { | |
1853 | return ill_rpc (__FUNCTION__); | |
1854 | } | |
942fd805 | 1855 | |
c906108c SS |
1856 | \f |
1857 | /* Msg_reply server routines. We only use msg_sig_post_untraced_reply. */ | |
1858 | ||
1859 | error_t | |
1860 | S_msg_sig_post_untraced_reply (mach_port_t reply, error_t err) | |
1861 | { | |
1862 | struct inf *inf = waiting_inf; | |
1863 | ||
1864 | if (err == EBUSY) | |
1865 | /* EBUSY is what we get when the crash server has grabbed control of the | |
1866 | process and doesn't like what signal we tried to send it. Just act | |
1867 | like the process stopped (using a signal of 0 should mean that the | |
1868 | *next* time the user continues, it will pass signal 0, which the crash | |
1869 | server should like). */ | |
1870 | { | |
1871 | inf->wait.status.kind = TARGET_WAITKIND_STOPPED; | |
1872 | inf->wait.status.value.sig = TARGET_SIGNAL_0; | |
1873 | } | |
1874 | else if (err) | |
1875 | warning ("Signal delivery failed: %s", strerror (err)); | |
1876 | ||
1877 | if (err) | |
1878 | /* We only get this reply when we've posted a signal to a process which we | |
1879 | thought was stopped, and which we expected to continue after the signal. | |
1880 | Given that the signal has failed for some reason, it's reasonable to | |
1881 | assume it's still stopped. */ | |
1882 | inf->stopped = 1; | |
1883 | else | |
1884 | inf->wait.suppress = 1; | |
1885 | ||
1886 | return 0; | |
1887 | } | |
1888 | ||
1889 | error_t | |
1890 | S_msg_sig_post_reply (mach_port_t reply, error_t err) | |
1891 | { | |
1892 | return ill_rpc (__FUNCTION__); | |
1893 | } | |
942fd805 | 1894 | |
c906108c SS |
1895 | \f |
1896 | /* Returns the number of messages queued for the receive right PORT. */ | |
1897 | static mach_port_msgcount_t | |
1898 | port_msgs_queued (mach_port_t port) | |
1899 | { | |
1900 | struct mach_port_status status; | |
1901 | error_t err = | |
c5aa993b | 1902 | mach_port_get_receive_status (mach_task_self (), port, &status); |
c906108c SS |
1903 | |
1904 | if (err) | |
1905 | return 0; | |
1906 | else | |
1907 | return status.mps_msgcount; | |
1908 | } | |
942fd805 | 1909 | |
c906108c SS |
1910 | \f |
1911 | /* Resume execution of the inferior process. | |
1912 | ||
1913 | If STEP is nonzero, single-step it. | |
1914 | If SIGNAL is nonzero, give it that signal. | |
1915 | ||
1916 | TID STEP: | |
1917 | -1 true Single step the current thread allowing other threads to run. | |
1918 | -1 false Continue the current thread allowing other threads to run. | |
1919 | X true Single step the given thread, don't allow any others to run. | |
1920 | X false Continue the given thread, do not allow any others to run. | |
1921 | (Where X, of course, is anything except -1) | |
1922 | ||
1923 | Note that a resume may not `take' if there are pending exceptions/&c | |
1924 | still unprocessed from the last resume we did (any given resume may result | |
1925 | in multiple events returned by wait). | |
c5aa993b | 1926 | */ |
c906108c SS |
1927 | static void |
1928 | gnu_resume (int tid, int step, enum target_signal sig) | |
1929 | { | |
1930 | struct proc *step_thread = 0; | |
1931 | struct inf *inf = current_inferior; | |
1932 | ||
1933 | inf_debug (inf, "tid = %d, step = %d, sig = %d", tid, step, sig); | |
1934 | ||
cce74817 | 1935 | inf_validate_procinfo (inf); |
c5aa993b | 1936 | |
c906108c | 1937 | if (sig != TARGET_SIGNAL_0 || inf->stopped) |
cce74817 JM |
1938 | { |
1939 | if (sig == TARGET_SIGNAL_0 && inf->nomsg) | |
1940 | inf_continue (inf); | |
1941 | else | |
1942 | inf_signal (inf, sig); | |
1943 | } | |
c906108c SS |
1944 | else if (inf->wait.exc.reply != MACH_PORT_NULL) |
1945 | /* We received an exception to which we have chosen not to forward, so | |
1946 | abort the faulting thread, which will perhaps retake it. */ | |
1947 | { | |
1948 | proc_abort (inf->wait.thread, 1); | |
1949 | warning ("Aborting %s with unforwarded exception %s.", | |
1950 | proc_string (inf->wait.thread), | |
1951 | target_signal_to_name (inf->wait.status.value.sig)); | |
1952 | } | |
1953 | ||
1954 | if (port_msgs_queued (inf->event_port)) | |
1955 | /* If there are still messages in our event queue, don't bother resuming | |
1956 | the process, as we're just going to stop it right away anyway. */ | |
1957 | return; | |
1958 | ||
1959 | inf_update_procs (inf); | |
1960 | ||
1961 | if (tid < 0) | |
1962 | /* Allow all threads to run, except perhaps single-stepping one. */ | |
1963 | { | |
1964 | inf_debug (inf, "running all threads; tid = %d", inferior_pid); | |
1965 | tid = inferior_pid; /* What to step. */ | |
1966 | inf_set_threads_resume_sc (inf, 0, 1); | |
1967 | } | |
1968 | else | |
1969 | /* Just allow a single thread to run. */ | |
1970 | { | |
1971 | struct proc *thread = inf_tid_to_thread (inf, tid); | |
c5aa993b | 1972 | if (!thread) |
c906108c SS |
1973 | error ("Can't run single thread id %d: no such thread!"); |
1974 | inf_debug (inf, "running one thread: %d/%d", inf->pid, thread->tid); | |
1975 | inf_set_threads_resume_sc (inf, thread, 0); | |
1976 | } | |
1977 | ||
1978 | if (step) | |
1979 | { | |
1980 | step_thread = inf_tid_to_thread (inf, tid); | |
c5aa993b | 1981 | if (!step_thread) |
c906108c SS |
1982 | warning ("Can't step thread id %d: no such thread.", tid); |
1983 | else | |
1984 | inf_debug (inf, "stepping thread: %d/%d", inf->pid, step_thread->tid); | |
1985 | } | |
1986 | if (step_thread != inf->step_thread) | |
1987 | inf_set_step_thread (inf, step_thread); | |
1988 | ||
1989 | inf_debug (inf, "here we go..."); | |
1990 | inf_resume (inf); | |
1991 | } | |
942fd805 | 1992 | |
c906108c SS |
1993 | \f |
1994 | static void | |
fba45db2 | 1995 | gnu_kill_inferior (void) |
c906108c SS |
1996 | { |
1997 | struct proc *task = current_inferior->task; | |
1998 | if (task) | |
1999 | { | |
2000 | proc_debug (task, "terminating..."); | |
2001 | task_terminate (task->port); | |
2002 | inf_set_pid (current_inferior, -1); | |
2003 | } | |
2004 | target_mourn_inferior (); | |
2005 | } | |
2006 | ||
2007 | /* Clean up after the inferior dies. */ | |
c906108c | 2008 | static void |
fba45db2 | 2009 | gnu_mourn_inferior (void) |
c906108c SS |
2010 | { |
2011 | inf_debug (current_inferior, "rip"); | |
2012 | inf_detach (current_inferior); | |
2013 | unpush_target (&gnu_ops); | |
2014 | generic_mourn_inferior (); | |
2015 | } | |
942fd805 | 2016 | |
c906108c SS |
2017 | \f |
2018 | /* Fork an inferior process, and start debugging it. */ | |
2019 | ||
2020 | /* Set INFERIOR_PID to the first thread available in the child, if any. */ | |
2021 | static int | |
fba45db2 | 2022 | inf_pick_first_thread (void) |
c906108c SS |
2023 | { |
2024 | if (current_inferior->task && current_inferior->threads) | |
2025 | /* The first thread. */ | |
2026 | return current_inferior->threads->tid; | |
2027 | else | |
2028 | /* What may be the next thread. */ | |
2029 | return next_thread_id; | |
2030 | } | |
2031 | ||
2032 | static struct inf * | |
fba45db2 | 2033 | cur_inf (void) |
c906108c | 2034 | { |
c5aa993b | 2035 | if (!current_inferior) |
c906108c SS |
2036 | current_inferior = make_inf (); |
2037 | return current_inferior; | |
2038 | } | |
2039 | ||
2040 | static void | |
fba45db2 | 2041 | gnu_create_inferior (char *exec_file, char *allargs, char **env) |
c906108c SS |
2042 | { |
2043 | struct inf *inf = cur_inf (); | |
2044 | ||
2045 | void trace_me () | |
c5aa993b JM |
2046 | { |
2047 | /* We're in the child; make this process stop as soon as it execs. */ | |
2048 | inf_debug (inf, "tracing self"); | |
2049 | if (ptrace (PTRACE_TRACEME) != 0) | |
2050 | error ("ptrace (PTRACE_TRACEME) failed!"); | |
2051 | } | |
7a292a7a | 2052 | void attach_to_child (int pid) |
c5aa993b JM |
2053 | { |
2054 | /* Attach to the now stopped child, which is actually a shell... */ | |
2055 | inf_debug (inf, "attaching to child: %d", pid); | |
c906108c | 2056 | |
c5aa993b | 2057 | inf_attach (inf, pid); |
c906108c | 2058 | |
c5aa993b JM |
2059 | attach_flag = 0; |
2060 | push_target (&gnu_ops); | |
c906108c | 2061 | |
c5aa993b JM |
2062 | inf->pending_execs = 2; |
2063 | inf->nomsg = 1; | |
2064 | inf->traced = 1; | |
c906108c | 2065 | |
c5aa993b JM |
2066 | /* Now let the child run again, knowing that it will stop immediately |
2067 | because of the ptrace. */ | |
2068 | inf_resume (inf); | |
2069 | inferior_pid = inf_pick_first_thread (); | |
c906108c | 2070 | |
c5aa993b JM |
2071 | startup_inferior (inf->pending_execs); |
2072 | } | |
c906108c SS |
2073 | |
2074 | inf_debug (inf, "creating inferior"); | |
2075 | ||
7a292a7a SS |
2076 | fork_inferior (exec_file, allargs, env, trace_me, attach_to_child, |
2077 | NULL, NULL); | |
c906108c | 2078 | |
cce74817 | 2079 | inf_validate_procinfo (inf); |
c906108c SS |
2080 | inf_update_signal_thread (inf); |
2081 | inf_set_traced (inf, inf->want_signals); | |
2082 | ||
2083 | /* Execing the process will have trashed our exception ports; steal them | |
2084 | back (or make sure they're restored if the user wants that). */ | |
2085 | if (inf->want_exceptions) | |
2086 | inf_steal_exc_ports (inf); | |
2087 | else | |
2088 | inf_restore_exc_ports (inf); | |
2089 | ||
2090 | /* Here we go! */ | |
2acceee2 | 2091 | proceed ((CORE_ADDR) -1, 0, 0); |
c906108c SS |
2092 | } |
2093 | ||
2094 | /* Mark our target-struct as eligible for stray "run" and "attach" | |
2095 | commands. */ | |
2096 | static int | |
fba45db2 | 2097 | gnu_can_run (void) |
c906108c SS |
2098 | { |
2099 | return 1; | |
2100 | } | |
942fd805 | 2101 | |
c906108c SS |
2102 | \f |
2103 | #ifdef ATTACH_DETACH | |
2104 | ||
2105 | /* Attach to process PID, then initialize for debugging it | |
2106 | and wait for the trace-trap that results from attaching. */ | |
2107 | static void | |
fba45db2 | 2108 | gnu_attach (char *args, int from_tty) |
c906108c SS |
2109 | { |
2110 | int pid; | |
2111 | char *exec_file; | |
2112 | struct inf *inf = cur_inf (); | |
2113 | ||
2114 | if (!args) | |
f75c77fc | 2115 | error_no_arg ("process-id to attach"); |
c906108c SS |
2116 | |
2117 | pid = atoi (args); | |
2118 | ||
c5aa993b | 2119 | if (pid == getpid ()) /* Trying to masturbate? */ |
c906108c SS |
2120 | error ("I refuse to debug myself!"); |
2121 | ||
2122 | if (from_tty) | |
2123 | { | |
2124 | exec_file = (char *) get_exec_file (0); | |
2125 | ||
2126 | if (exec_file) | |
2127 | printf_unfiltered ("Attaching to program `%s', pid %d\n", | |
2128 | exec_file, pid); | |
2129 | else | |
2130 | printf_unfiltered ("Attaching to pid %d\n", pid); | |
2131 | ||
2132 | gdb_flush (gdb_stdout); | |
2133 | } | |
2134 | ||
2135 | inf_debug (inf, "attaching to pid: %d", pid); | |
2136 | ||
2137 | inf_attach (inf, pid); | |
2138 | inf_update_procs (inf); | |
2139 | ||
2140 | inferior_pid = inf_pick_first_thread (); | |
2141 | ||
2142 | attach_flag = 1; | |
2143 | push_target (&gnu_ops); | |
2144 | ||
b83266a0 SS |
2145 | /* We have to initialize the terminal settings now, since the code |
2146 | below might try to restore them. */ | |
2147 | target_terminal_init (); | |
c5aa993b | 2148 | |
c906108c SS |
2149 | /* If the process was stopped before we attached, make it continue the next |
2150 | time the user does a continue. */ | |
cce74817 JM |
2151 | inf_validate_procinfo (inf); |
2152 | ||
2153 | inf_update_signal_thread (inf); | |
2154 | inf_set_traced (inf, inf->want_signals); | |
c906108c | 2155 | |
c5aa993b | 2156 | #if 0 /* Do we need this? */ |
c906108c SS |
2157 | renumber_threads (0); /* Give our threads reasonable names. */ |
2158 | #endif | |
2159 | } | |
942fd805 | 2160 | |
c906108c SS |
2161 | \f |
2162 | /* Take a program previously attached to and detaches it. | |
2163 | The program resumes execution and will no longer stop | |
2164 | on signals, etc. We'd better not have left any breakpoints | |
2165 | in the program or it'll die when it hits one. For this | |
2166 | to work, it may be necessary for the process to have been | |
2167 | previously attached. It *might* work if the program was | |
2168 | started via fork. */ | |
2169 | static void | |
fba45db2 | 2170 | gnu_detach (char *args, int from_tty) |
c906108c SS |
2171 | { |
2172 | if (from_tty) | |
2173 | { | |
2174 | char *exec_file = get_exec_file (0); | |
2175 | if (exec_file) | |
2176 | printf_unfiltered ("Detaching from program `%s' pid %d\n", | |
2177 | exec_file, current_inferior->pid); | |
2178 | else | |
2179 | printf_unfiltered ("Detaching from pid %d\n", current_inferior->pid); | |
2180 | gdb_flush (gdb_stdout); | |
2181 | } | |
c5aa993b | 2182 | |
c906108c SS |
2183 | inf_detach (current_inferior); |
2184 | ||
2185 | inferior_pid = 0; | |
2186 | ||
c5aa993b | 2187 | unpush_target (&gnu_ops); /* Pop out of handling an inferior */ |
c906108c SS |
2188 | } |
2189 | #endif /* ATTACH_DETACH */ | |
2190 | ||
942fd805 | 2191 | \f |
c906108c | 2192 | static void |
fba45db2 | 2193 | gnu_terminal_init_inferior (void) |
c906108c | 2194 | { |
bf62e5b4 | 2195 | gdb_assert (current_inferior); |
c906108c SS |
2196 | terminal_init_inferior_with_pgrp (current_inferior->pid); |
2197 | } | |
2198 | ||
2199 | /* Get ready to modify the registers array. On machines which store | |
2200 | individual registers, this doesn't need to do anything. On machines | |
2201 | which store all the registers in one fell swoop, this makes sure | |
2202 | that registers contains all the registers from the program being | |
2203 | debugged. */ | |
c906108c | 2204 | static void |
fba45db2 | 2205 | gnu_prepare_to_store (void) |
c906108c SS |
2206 | { |
2207 | #ifdef CHILD_PREPARE_TO_STORE | |
2208 | CHILD_PREPARE_TO_STORE (); | |
2209 | #endif | |
2210 | } | |
2211 | ||
2212 | static void | |
fba45db2 | 2213 | gnu_open (char *arg, int from_tty) |
c906108c SS |
2214 | { |
2215 | error ("Use the \"run\" command to start a Unix child process."); | |
2216 | } | |
2217 | ||
2218 | static void | |
fba45db2 | 2219 | gnu_stop (void) |
c906108c SS |
2220 | { |
2221 | error ("to_stop target function not implemented"); | |
2222 | } | |
2223 | ||
7a292a7a | 2224 | static char * |
fba45db2 | 2225 | gnu_pid_to_exec_file (void) |
c906108c SS |
2226 | { |
2227 | error ("to_pid_to_exec_file target function not implemented"); | |
7a292a7a | 2228 | return NULL; |
c906108c | 2229 | } |
c5aa993b | 2230 | |
c906108c SS |
2231 | |
2232 | static int | |
2233 | gnu_thread_alive (int tid) | |
2234 | { | |
2235 | inf_update_procs (current_inferior); | |
2236 | return !!inf_tid_to_thread (current_inferior, tid); | |
2237 | } | |
942fd805 | 2238 | |
c906108c | 2239 | \f |
942fd805 MK |
2240 | /* Read inferior task's LEN bytes from ADDR and copy it to MYADDR in |
2241 | gdb's address space. Return 0 on failure; number of bytes read | |
2242 | otherwise. */ | |
c906108c | 2243 | int |
fba45db2 | 2244 | gnu_read_inferior (task_t task, CORE_ADDR addr, char *myaddr, int length) |
c906108c SS |
2245 | { |
2246 | error_t err; | |
2247 | vm_address_t low_address = (vm_address_t) trunc_page (addr); | |
2248 | vm_size_t aligned_length = | |
c5aa993b JM |
2249 | (vm_size_t) round_page (addr + length) - low_address; |
2250 | pointer_t copied; | |
2251 | int copy_count; | |
c906108c SS |
2252 | |
2253 | /* Get memory from inferior with page aligned addresses */ | |
2254 | err = vm_read (task, low_address, aligned_length, &copied, ©_count); | |
2255 | if (err) | |
2256 | return 0; | |
2257 | ||
c5aa993b | 2258 | err = hurd_safe_copyin (myaddr, (void *) addr - low_address + copied, length); |
c906108c SS |
2259 | if (err) |
2260 | { | |
2261 | warning ("Read from inferior faulted: %s", strerror (err)); | |
2262 | length = 0; | |
2263 | } | |
2264 | ||
2265 | err = vm_deallocate (mach_task_self (), copied, copy_count); | |
2266 | if (err) | |
2267 | warning ("gnu_read_inferior vm_deallocate failed: %s", strerror (err)); | |
2268 | ||
2269 | return length; | |
2270 | } | |
2271 | ||
2272 | #define CHK_GOTO_OUT(str,ret) \ | |
2273 | do if (ret != KERN_SUCCESS) { errstr = #str; goto out; } while(0) | |
2274 | ||
c5aa993b JM |
2275 | struct vm_region_list |
2276 | { | |
c906108c | 2277 | struct vm_region_list *next; |
c5aa993b JM |
2278 | vm_prot_t protection; |
2279 | vm_address_t start; | |
2280 | vm_size_t length; | |
c906108c SS |
2281 | }; |
2282 | ||
c5aa993b | 2283 | struct obstack region_obstack; |
c906108c | 2284 | |
942fd805 MK |
2285 | /* Write gdb's LEN bytes from MYADDR and copy it to ADDR in inferior |
2286 | task's address space. */ | |
c906108c | 2287 | int |
fba45db2 | 2288 | gnu_write_inferior (task_t task, CORE_ADDR addr, char *myaddr, int length) |
c906108c SS |
2289 | { |
2290 | error_t err = 0; | |
c5aa993b JM |
2291 | vm_address_t low_address = (vm_address_t) trunc_page (addr); |
2292 | vm_size_t aligned_length = | |
2293 | (vm_size_t) round_page (addr + length) - low_address; | |
2294 | pointer_t copied; | |
2295 | int copy_count; | |
2296 | int deallocate = 0; | |
c906108c | 2297 | |
c5aa993b | 2298 | char *errstr = "Bug in gnu_write_inferior"; |
c906108c SS |
2299 | |
2300 | struct vm_region_list *region_element; | |
c5aa993b | 2301 | struct vm_region_list *region_head = (struct vm_region_list *) NULL; |
c906108c SS |
2302 | |
2303 | /* Get memory from inferior with page aligned addresses */ | |
2304 | err = vm_read (task, | |
2305 | low_address, | |
2306 | aligned_length, | |
2307 | &copied, | |
2308 | ©_count); | |
2309 | CHK_GOTO_OUT ("gnu_write_inferior vm_read failed", err); | |
2310 | ||
2311 | deallocate++; | |
2312 | ||
942fd805 MK |
2313 | err = hurd_safe_copyout ((void *) addr - low_address + copied, |
2314 | myaddr, length); | |
c906108c SS |
2315 | CHK_GOTO_OUT ("Write to inferior faulted", err); |
2316 | ||
2317 | obstack_init (®ion_obstack); | |
2318 | ||
2319 | /* Do writes atomically. | |
942fd805 | 2320 | First check for holes and unwritable memory. */ |
c906108c | 2321 | { |
c5aa993b JM |
2322 | vm_size_t remaining_length = aligned_length; |
2323 | vm_address_t region_address = low_address; | |
c906108c SS |
2324 | |
2325 | struct vm_region_list *scan; | |
2326 | ||
c5aa993b | 2327 | while (region_address < low_address + aligned_length) |
c906108c SS |
2328 | { |
2329 | vm_prot_t protection; | |
2330 | vm_prot_t max_protection; | |
2331 | vm_inherit_t inheritance; | |
2332 | boolean_t shared; | |
2333 | mach_port_t object_name; | |
2334 | vm_offset_t offset; | |
c5aa993b JM |
2335 | vm_size_t region_length = remaining_length; |
2336 | vm_address_t old_address = region_address; | |
2337 | ||
c906108c SS |
2338 | err = vm_region (task, |
2339 | ®ion_address, | |
2340 | ®ion_length, | |
2341 | &protection, | |
2342 | &max_protection, | |
2343 | &inheritance, | |
2344 | &shared, | |
2345 | &object_name, | |
2346 | &offset); | |
2347 | CHK_GOTO_OUT ("vm_region failed", err); | |
2348 | ||
2349 | /* Check for holes in memory */ | |
2350 | if (old_address != region_address) | |
2351 | { | |
2352 | warning ("No memory at 0x%x. Nothing written", | |
2353 | old_address); | |
2354 | err = KERN_SUCCESS; | |
2355 | length = 0; | |
2356 | goto out; | |
2357 | } | |
2358 | ||
2359 | if (!(max_protection & VM_PROT_WRITE)) | |
2360 | { | |
2361 | warning ("Memory at address 0x%x is unwritable. Nothing written", | |
2362 | old_address); | |
2363 | err = KERN_SUCCESS; | |
2364 | length = 0; | |
2365 | goto out; | |
2366 | } | |
2367 | ||
2368 | /* Chain the regions for later use */ | |
c5aa993b | 2369 | region_element = |
c906108c | 2370 | (struct vm_region_list *) |
c5aa993b JM |
2371 | obstack_alloc (®ion_obstack, sizeof (struct vm_region_list)); |
2372 | ||
c906108c | 2373 | region_element->protection = protection; |
c5aa993b JM |
2374 | region_element->start = region_address; |
2375 | region_element->length = region_length; | |
c906108c SS |
2376 | |
2377 | /* Chain the regions along with protections */ | |
2378 | region_element->next = region_head; | |
c5aa993b JM |
2379 | region_head = region_element; |
2380 | ||
c906108c SS |
2381 | region_address += region_length; |
2382 | remaining_length = remaining_length - region_length; | |
2383 | } | |
2384 | ||
2385 | /* If things fail after this, we give up. | |
942fd805 | 2386 | Somebody is messing up inferior_task's mappings. */ |
c5aa993b | 2387 | |
c906108c SS |
2388 | /* Enable writes to the chained vm regions */ |
2389 | for (scan = region_head; scan; scan = scan->next) | |
2390 | { | |
c906108c SS |
2391 | if (!(scan->protection & VM_PROT_WRITE)) |
2392 | { | |
2393 | err = vm_protect (task, | |
2394 | scan->start, | |
2395 | scan->length, | |
2396 | FALSE, | |
2397 | scan->protection | VM_PROT_WRITE); | |
2398 | CHK_GOTO_OUT ("vm_protect: enable write failed", err); | |
2399 | } | |
2400 | } | |
2401 | ||
2402 | err = vm_write (task, | |
2403 | low_address, | |
2404 | copied, | |
2405 | aligned_length); | |
2406 | CHK_GOTO_OUT ("vm_write failed", err); | |
c5aa993b | 2407 | |
c906108c SS |
2408 | /* Set up the original region protections, if they were changed */ |
2409 | for (scan = region_head; scan; scan = scan->next) | |
2410 | { | |
c906108c SS |
2411 | if (!(scan->protection & VM_PROT_WRITE)) |
2412 | { | |
2413 | err = vm_protect (task, | |
2414 | scan->start, | |
2415 | scan->length, | |
2416 | FALSE, | |
2417 | scan->protection); | |
2418 | CHK_GOTO_OUT ("vm_protect: enable write failed", err); | |
2419 | } | |
2420 | } | |
2421 | } | |
2422 | ||
c5aa993b | 2423 | out: |
c906108c SS |
2424 | if (deallocate) |
2425 | { | |
2426 | obstack_free (®ion_obstack, 0); | |
c5aa993b | 2427 | |
c906108c SS |
2428 | (void) vm_deallocate (mach_task_self (), |
2429 | copied, | |
2430 | copy_count); | |
2431 | } | |
2432 | ||
2433 | if (err != KERN_SUCCESS) | |
2434 | { | |
2435 | warning ("%s: %s", errstr, mach_error_string (err)); | |
2436 | return 0; | |
2437 | } | |
2438 | ||
2439 | return length; | |
2440 | } | |
942fd805 | 2441 | |
c906108c | 2442 | \f |
0359ddd6 KB |
2443 | /* Return 0 on failure, number of bytes handled otherwise. TARGET |
2444 | is ignored. */ | |
c906108c | 2445 | static int |
0359ddd6 | 2446 | gnu_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write, |
043780a1 | 2447 | struct mem_attrib *attrib, |
0359ddd6 | 2448 | struct target_ops *target) |
c906108c | 2449 | { |
942fd805 MK |
2450 | task_t task = (current_inferior |
2451 | ? (current_inferior->task | |
2452 | ? current_inferior->task->port : 0) | |
2453 | : 0); | |
c906108c SS |
2454 | |
2455 | if (task == MACH_PORT_NULL) | |
2456 | return 0; | |
2457 | else | |
2458 | { | |
2459 | inf_debug (current_inferior, "%s %p[%d] %s %p", | |
2460 | write ? "writing" : "reading", memaddr, len, | |
2461 | write ? "<--" : "-->", myaddr); | |
2462 | if (write) | |
2463 | return gnu_write_inferior (task, memaddr, myaddr, len); | |
2464 | else | |
c5aa993b | 2465 | return gnu_read_inferior (task, memaddr, myaddr, len); |
c906108c SS |
2466 | } |
2467 | } | |
942fd805 | 2468 | |
c906108c | 2469 | \f |
ed9a39eb | 2470 | /* Return printable description of proc. */ |
f90b2b1d | 2471 | char * |
ed9a39eb JM |
2472 | proc_string (struct proc *proc) |
2473 | { | |
2474 | static char tid_str[80]; | |
2475 | if (proc_is_task (proc)) | |
2476 | sprintf (tid_str, "process %d", proc->inf->pid); | |
2477 | else | |
2478 | sprintf (tid_str, "thread %d.%d", | |
2479 | proc->inf->pid, pid_to_thread_id (proc->tid)); | |
2480 | return tid_str; | |
2481 | } | |
2482 | ||
2483 | static char * | |
2484 | gnu_pid_to_str (int tid) | |
2485 | { | |
2486 | struct inf *inf = current_inferior; | |
2487 | struct proc *thread = inf_tid_to_thread (inf, tid); | |
2488 | ||
2489 | if (thread) | |
2490 | return proc_string (thread); | |
2491 | else | |
2492 | { | |
2493 | static char tid_str[80]; | |
2494 | sprintf (tid_str, "bogus thread id %d", tid); | |
2495 | return tid_str; | |
2496 | } | |
2497 | } | |
942fd805 | 2498 | |
ed9a39eb | 2499 | \f |
c906108c SS |
2500 | extern void gnu_store_registers (int regno); |
2501 | extern void gnu_fetch_registers (int regno); | |
2502 | ||
c5aa993b | 2503 | struct target_ops gnu_ops; |
c906108c SS |
2504 | |
2505 | static void | |
c5aa993b JM |
2506 | init_gnu_ops (void) |
2507 | { | |
942fd805 MK |
2508 | gnu_ops.to_shortname = "GNU"; /* to_shortname */ |
2509 | gnu_ops.to_longname = "GNU Hurd process"; /* to_longname */ | |
c5aa993b | 2510 | gnu_ops.to_doc = "GNU Hurd process"; /* to_doc */ |
942fd805 MK |
2511 | gnu_ops.to_open = gnu_open; /* to_open */ |
2512 | gnu_ops.to_close = 0; /* to_close */ | |
c5aa993b | 2513 | gnu_ops.to_attach = gnu_attach; /* to_attach */ |
c906108c | 2514 | gnu_ops.to_post_attach = NULL; |
c5aa993b JM |
2515 | gnu_ops.to_require_attach = NULL; /* to_require_attach */ |
2516 | gnu_ops.to_detach = gnu_detach; /* to_detach */ | |
2517 | gnu_ops.to_require_detach = NULL; /* to_require_detach */ | |
2518 | gnu_ops.to_resume = gnu_resume; /* to_resume */ | |
942fd805 MK |
2519 | gnu_ops.to_wait = gnu_wait; /* to_wait */ |
2520 | gnu_ops.to_post_wait = NULL; /* to_post_wait */ | |
2521 | gnu_ops.to_fetch_registers = gnu_fetch_registers; /* to_fetch_registers */ | |
2522 | gnu_ops.to_store_registers = gnu_store_registers; /* to_store_registers */ | |
2523 | gnu_ops.to_prepare_to_store = gnu_prepare_to_store; /* to_prepare_to_store */ | |
2524 | gnu_ops.to_xfer_memory = gnu_xfer_memory; /* to_xfer_memory */ | |
2525 | gnu_ops.to_files_info = 0; /* to_files_info */ | |
c5aa993b JM |
2526 | gnu_ops.to_insert_breakpoint = memory_insert_breakpoint; |
2527 | gnu_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
2528 | gnu_ops.to_terminal_init = gnu_terminal_init_inferior; | |
2529 | gnu_ops.to_terminal_inferior = terminal_inferior; | |
2530 | gnu_ops.to_terminal_ours_for_output = terminal_ours_for_output; | |
2531 | gnu_ops.to_terminal_ours = terminal_ours; | |
2532 | gnu_ops.to_terminal_info = child_terminal_info; | |
2533 | gnu_ops.to_kill = gnu_kill_inferior; /* to_kill */ | |
942fd805 MK |
2534 | gnu_ops.to_load = 0; /* to_load */ |
2535 | gnu_ops.to_lookup_symbol = 0; /* to_lookup_symbol */ | |
2536 | gnu_ops.to_create_inferior = gnu_create_inferior; /* to_create_inferior */ | |
2537 | gnu_ops.to_post_startup_inferior = NULL; /* to_post_startup_inferior */ | |
2538 | /* to_acknowledge_created_inferior */ | |
2539 | gnu_ops.to_acknowledge_created_inferior = NULL; | |
2540 | /* to_clone_and_follow_inferior */ | |
2541 | gnu_ops.to_clone_and_follow_inferior = NULL; | |
2542 | /* to_post_follow_inferior_by_clone */ | |
2543 | gnu_ops.to_post_follow_inferior_by_clone = NULL; | |
c906108c SS |
2544 | gnu_ops.to_insert_fork_catchpoint = NULL; |
2545 | gnu_ops.to_remove_fork_catchpoint = NULL; | |
2546 | gnu_ops.to_insert_vfork_catchpoint = NULL; | |
2547 | gnu_ops.to_remove_vfork_catchpoint = NULL; | |
942fd805 | 2548 | gnu_ops.to_has_forked = NULL; /* to_has_forked */ |
c5aa993b | 2549 | gnu_ops.to_has_vforked = NULL; /* to_has_vforked */ |
c906108c | 2550 | gnu_ops.to_can_follow_vfork_prior_to_exec = NULL; |
c5aa993b | 2551 | gnu_ops.to_post_follow_vfork = NULL; /* to_post_follow_vfork */ |
c906108c SS |
2552 | gnu_ops.to_insert_exec_catchpoint = NULL; |
2553 | gnu_ops.to_remove_exec_catchpoint = NULL; | |
2554 | gnu_ops.to_has_execd = NULL; | |
2555 | gnu_ops.to_reported_exec_events_per_exec_call = NULL; | |
2556 | gnu_ops.to_has_exited = NULL; | |
c5aa993b JM |
2557 | gnu_ops.to_mourn_inferior = gnu_mourn_inferior; /* to_mourn_inferior */ |
2558 | gnu_ops.to_can_run = gnu_can_run; /* to_can_run */ | |
2559 | gnu_ops.to_notice_signals = 0; /* to_notice_signals */ | |
2560 | gnu_ops.to_thread_alive = gnu_thread_alive; /* to_thread_alive */ | |
ed9a39eb | 2561 | gnu_ops.to_pid_to_str = gnu_pid_to_str; /* to_pid_to_str */ |
c5aa993b | 2562 | gnu_ops.to_stop = gnu_stop; /* to_stop */ |
942fd805 | 2563 | gnu_ops.to_pid_to_exec_file = gnu_pid_to_exec_file; /* to_pid_to_exec_file */ |
c906108c | 2564 | gnu_ops.to_core_file_to_sym_file = NULL; |
c5aa993b | 2565 | gnu_ops.to_stratum = process_stratum; /* to_stratum */ |
942fd805 | 2566 | gnu_ops.DONT_USE = 0; /* to_next */ |
c5aa993b | 2567 | gnu_ops.to_has_all_memory = 1; /* to_has_all_memory */ |
942fd805 MK |
2568 | gnu_ops.to_has_memory = 1; /* to_has_memory */ |
2569 | gnu_ops.to_has_stack = 1; /* to_has_stack */ | |
2570 | gnu_ops.to_has_registers = 1; /* to_has_registers */ | |
2571 | gnu_ops.to_has_execution = 1; /* to_has_execution */ | |
2572 | gnu_ops.to_sections = 0; /* sections */ | |
2573 | gnu_ops.to_sections_end = 0; /* sections_end */ | |
2574 | gnu_ops.to_magic = OPS_MAGIC; /* to_magic */ | |
c5aa993b | 2575 | } /* init_gnu_ops */ |
942fd805 | 2576 | |
c906108c | 2577 | \f |
c906108c SS |
2578 | /* User task commands. */ |
2579 | ||
2580 | struct cmd_list_element *set_task_cmd_list = 0; | |
2581 | struct cmd_list_element *show_task_cmd_list = 0; | |
2582 | /* User thread commands. */ | |
2583 | ||
2584 | /* Commands with a prefix of `set/show thread'. */ | |
2585 | extern struct cmd_list_element *thread_cmd_list; | |
2586 | struct cmd_list_element *set_thread_cmd_list = NULL; | |
2587 | struct cmd_list_element *show_thread_cmd_list = NULL; | |
2588 | ||
2589 | /* Commands with a prefix of `set/show thread default'. */ | |
2590 | struct cmd_list_element *set_thread_default_cmd_list = NULL; | |
2591 | struct cmd_list_element *show_thread_default_cmd_list = NULL; | |
2592 | ||
2593 | static void | |
2594 | set_thread_cmd (char *args, int from_tty) | |
2595 | { | |
9846de1b | 2596 | printf_unfiltered ("\"set thread\" must be followed by the name of a thread property, or \"default\".\n"); |
c906108c SS |
2597 | } |
2598 | ||
2599 | static void | |
2600 | show_thread_cmd (char *args, int from_tty) | |
2601 | { | |
2602 | printf_unfiltered ("\"show thread\" must be followed by the name of a thread property, or \"default\".\n"); | |
2603 | } | |
2604 | ||
2605 | static void | |
2606 | set_thread_default_cmd (char *args, int from_tty) | |
2607 | { | |
2608 | printf_unfiltered ("\"set thread default\" must be followed by the name of a thread property.\n"); | |
2609 | } | |
2610 | ||
2611 | static void | |
2612 | show_thread_default_cmd (char *args, int from_tty) | |
2613 | { | |
2614 | printf_unfiltered ("\"show thread default\" must be followed by the name of a thread property.\n"); | |
2615 | } | |
2616 | ||
2617 | static int | |
2618 | parse_int_arg (char *args, char *cmd_prefix) | |
2619 | { | |
2620 | if (args) | |
2621 | { | |
2622 | char *arg_end; | |
2623 | int val = strtoul (args, &arg_end, 10); | |
2624 | if (*args && *arg_end == '\0') | |
2625 | return val; | |
2626 | } | |
2627 | error ("Illegal argument for \"%s\" command, should be an integer.", cmd_prefix); | |
2628 | } | |
2629 | ||
2630 | static int | |
2631 | _parse_bool_arg (char *args, char *t_val, char *f_val, char *cmd_prefix) | |
2632 | { | |
2633 | if (!args || strcmp (args, t_val) == 0) | |
2634 | return 1; | |
2635 | else if (strcmp (args, f_val) == 0) | |
2636 | return 0; | |
2637 | else | |
2638 | error ("Illegal argument for \"%s\" command, should be \"%s\" or \"%s\".", | |
2639 | cmd_prefix, t_val, f_val); | |
2640 | } | |
2641 | ||
2642 | #define parse_bool_arg(args, cmd_prefix) \ | |
2643 | _parse_bool_arg (args, "on", "off", cmd_prefix) | |
2644 | ||
2645 | static void | |
2646 | check_empty (char *args, char *cmd_prefix) | |
2647 | { | |
2648 | if (args) | |
2649 | error ("Garbage after \"%s\" command: `%s'", cmd_prefix, args); | |
2650 | } | |
2651 | ||
2652 | /* Returns the alive thread named by INFERIOR_PID, or signals an error. */ | |
2653 | static struct proc * | |
fba45db2 | 2654 | cur_thread (void) |
c906108c SS |
2655 | { |
2656 | struct inf *inf = cur_inf (); | |
2657 | struct proc *thread = inf_tid_to_thread (inf, inferior_pid); | |
2658 | if (!thread) | |
2659 | error ("No current thread."); | |
2660 | return thread; | |
2661 | } | |
2662 | ||
2663 | /* Returns the current inferior, but signals an error if it has no task. */ | |
2664 | static struct inf * | |
fba45db2 | 2665 | active_inf (void) |
c906108c SS |
2666 | { |
2667 | struct inf *inf = cur_inf (); | |
c5aa993b | 2668 | if (!inf->task) |
c906108c SS |
2669 | error ("No current process."); |
2670 | return inf; | |
2671 | } | |
942fd805 | 2672 | |
c906108c SS |
2673 | \f |
2674 | static void | |
2675 | set_task_pause_cmd (char *args, int from_tty) | |
2676 | { | |
2677 | struct inf *inf = cur_inf (); | |
2678 | int old_sc = inf->pause_sc; | |
2679 | ||
2680 | inf->pause_sc = parse_bool_arg (args, "set task pause"); | |
2681 | ||
2682 | if (old_sc == 0 && inf->pause_sc != 0) | |
2683 | /* If the task is currently unsuspended, immediately suspend it, | |
2684 | otherwise wait until the next time it gets control. */ | |
2685 | inf_suspend (inf); | |
2686 | } | |
2687 | ||
2688 | static void | |
2689 | show_task_pause_cmd (char *args, int from_tty) | |
2690 | { | |
2691 | struct inf *inf = cur_inf (); | |
2692 | check_empty (args, "show task pause"); | |
2693 | printf_unfiltered ("The inferior task %s suspended while gdb has control.\n", | |
2694 | inf->task | |
2695 | ? (inf->pause_sc == 0 ? "isn't" : "is") | |
2696 | : (inf->pause_sc == 0 ? "won't be" : "will be")); | |
2697 | } | |
2698 | ||
2699 | static void | |
2700 | set_task_detach_sc_cmd (char *args, int from_tty) | |
2701 | { | |
2702 | cur_inf ()->detach_sc = parse_int_arg (args, "set task detach-suspend-count"); | |
2703 | } | |
2704 | ||
2705 | static void | |
2706 | show_task_detach_sc_cmd (char *args, int from_tty) | |
2707 | { | |
2708 | check_empty (args, "show task detach-suspend-count"); | |
2709 | printf_unfiltered ("The inferior task will be left with a suspend count of %d when detaching.\n", | |
2710 | cur_inf ()->detach_sc); | |
2711 | } | |
942fd805 | 2712 | |
c906108c SS |
2713 | \f |
2714 | static void | |
2715 | set_thread_default_pause_cmd (char *args, int from_tty) | |
2716 | { | |
2717 | struct inf *inf = cur_inf (); | |
2718 | inf->default_thread_pause_sc = | |
2719 | parse_bool_arg (args, "set thread default pause") ? 0 : 1; | |
2720 | } | |
2721 | ||
2722 | static void | |
2723 | show_thread_default_pause_cmd (char *args, int from_tty) | |
2724 | { | |
2725 | struct inf *inf = cur_inf (); | |
2726 | int sc = inf->default_thread_pause_sc; | |
2727 | check_empty (args, "show thread default pause"); | |
2728 | printf_unfiltered ("New threads %s suspended while gdb has control%s.\n", | |
2729 | sc ? "are" : "aren't", | |
2730 | !sc && inf->pause_sc ? " (but the task is)" : ""); | |
2731 | } | |
2732 | ||
2733 | static void | |
2734 | set_thread_default_run_cmd (char *args, int from_tty) | |
2735 | { | |
2736 | struct inf *inf = cur_inf (); | |
2737 | inf->default_thread_run_sc = | |
2738 | parse_bool_arg (args, "set thread default run") ? 0 : 1; | |
2739 | } | |
2740 | ||
2741 | static void | |
2742 | show_thread_default_run_cmd (char *args, int from_tty) | |
2743 | { | |
2744 | struct inf *inf = cur_inf (); | |
2745 | check_empty (args, "show thread default run"); | |
2746 | printf_unfiltered ("New threads %s allowed to run.\n", | |
2747 | inf->default_thread_run_sc == 0 ? "are" : "aren't"); | |
2748 | } | |
2749 | ||
2750 | static void | |
2751 | set_thread_default_detach_sc_cmd (char *args, int from_tty) | |
2752 | { | |
2753 | cur_inf ()->default_thread_detach_sc = | |
2754 | parse_int_arg (args, "set thread default detach-suspend-count"); | |
2755 | } | |
2756 | ||
2757 | static void | |
2758 | show_thread_default_detach_sc_cmd (char *args, int from_tty) | |
2759 | { | |
2760 | check_empty (args, "show thread default detach-suspend-count"); | |
2761 | printf_unfiltered ("New threads will get a detach-suspend-count of %d.\n", | |
2762 | cur_inf ()->default_thread_detach_sc); | |
2763 | } | |
942fd805 | 2764 | |
c906108c SS |
2765 | \f |
2766 | /* Steal a send right called NAME in the inferior task, and make it PROC's | |
2767 | saved exception port. */ | |
2768 | static void | |
2769 | steal_exc_port (struct proc *proc, mach_port_t name) | |
2770 | { | |
2771 | error_t err; | |
2772 | mach_port_t port; | |
2773 | mach_msg_type_name_t port_type; | |
2774 | ||
2775 | if (!proc || !proc->inf->task) | |
2776 | error ("No inferior task."); | |
2777 | ||
2778 | err = mach_port_extract_right (proc->inf->task->port, | |
2779 | name, MACH_MSG_TYPE_COPY_SEND, | |
2780 | &port, &port_type); | |
2781 | if (err) | |
2782 | error ("Couldn't extract send right %d from inferior: %s", | |
2783 | name, strerror (err)); | |
2784 | ||
2785 | if (proc->saved_exc_port) | |
2786 | /* Get rid of our reference to the old one. */ | |
2787 | mach_port_deallocate (mach_task_self (), proc->saved_exc_port); | |
2788 | ||
2789 | proc->saved_exc_port = port; | |
2790 | ||
c5aa993b | 2791 | if (!proc->exc_port) |
c906108c SS |
2792 | /* If PROC is a thread, we may not have set its exception port before. |
2793 | We can't use proc_steal_exc_port because it also sets saved_exc_port. */ | |
2794 | { | |
c5aa993b JM |
2795 | proc->exc_port = proc->inf->event_port; |
2796 | err = proc_set_exception_port (proc, proc->exc_port); | |
2797 | error ("Can't set exception port for %s: %s", | |
2798 | proc_string (proc), strerror (err)); | |
c906108c SS |
2799 | } |
2800 | } | |
942fd805 | 2801 | |
c906108c SS |
2802 | static void |
2803 | set_task_exc_port_cmd (char *args, int from_tty) | |
2804 | { | |
2805 | struct inf *inf = cur_inf (); | |
2806 | if (!args) | |
2807 | error ("No argument to \"set task exception-port\" command."); | |
2808 | steal_exc_port (inf->task, parse_and_eval_address (args)); | |
2809 | } | |
2810 | ||
c5aa993b | 2811 | static void |
c906108c SS |
2812 | set_stopped_cmd (char *args, int from_tty) |
2813 | { | |
2814 | cur_inf ()->stopped = _parse_bool_arg (args, "yes", "no", "set stopped"); | |
2815 | } | |
2816 | ||
2817 | static void | |
2818 | show_stopped_cmd (char *args, int from_tty) | |
2819 | { | |
2820 | struct inf *inf = active_inf (); | |
2821 | check_empty (args, "show stopped"); | |
2822 | printf_unfiltered ("The inferior process %s stopped.\n", | |
2823 | inf->stopped ? "is" : "isn't"); | |
2824 | } | |
2825 | ||
c5aa993b | 2826 | static void |
c906108c SS |
2827 | set_sig_thread_cmd (char *args, int from_tty) |
2828 | { | |
c906108c SS |
2829 | struct inf *inf = cur_inf (); |
2830 | ||
c5aa993b | 2831 | if (!args || (!isdigit (*args) && strcmp (args, "none") != 0)) |
c906108c SS |
2832 | error ("Illegal argument to \"set signal-thread\" command.\n" |
2833 | "Should be an integer thread ID, or `none'."); | |
2834 | ||
2835 | if (strcmp (args, "none") == 0) | |
2836 | inf->signal_thread = 0; | |
2837 | else | |
2838 | { | |
2839 | int tid = thread_id_to_pid (atoi (args)); | |
2840 | if (tid < 0) | |
2841 | error ("Thread ID %s not known. Use the \"info threads\" command to\n" | |
2842 | "see the IDs of currently known threads.", args); | |
2843 | inf->signal_thread = inf_tid_to_thread (inf, tid); | |
2844 | } | |
2845 | } | |
2846 | ||
2847 | static void | |
2848 | show_sig_thread_cmd (char *args, int from_tty) | |
2849 | { | |
2850 | struct inf *inf = active_inf (); | |
2851 | check_empty (args, "show signal-thread"); | |
2852 | if (inf->signal_thread) | |
2853 | printf_unfiltered ("The signal thread is %s.\n", | |
2854 | proc_string (inf->signal_thread)); | |
2855 | else | |
2856 | printf_unfiltered ("There is no signal thread.\n"); | |
2857 | } | |
942fd805 | 2858 | |
c906108c | 2859 | \f |
c5aa993b | 2860 | static void |
c906108c SS |
2861 | set_signals_cmd (char *args, int from_tty) |
2862 | { | |
c906108c SS |
2863 | struct inf *inf = cur_inf (); |
2864 | ||
2865 | inf->want_signals = parse_bool_arg (args, "set signals"); | |
2866 | ||
2867 | if (inf->task && inf->want_signals != inf->traced) | |
2868 | /* Make this take effect immediately in a running process. */ | |
2869 | inf_set_traced (inf, inf->want_signals); | |
2870 | } | |
2871 | ||
2872 | static void | |
2873 | show_signals_cmd (char *args, int from_tty) | |
2874 | { | |
2875 | struct inf *inf = cur_inf (); | |
2876 | check_empty (args, "show signals"); | |
2877 | printf_unfiltered ("The inferior process's signals %s intercepted.\n", | |
2878 | inf->task | |
2879 | ? (inf->traced ? "are" : "aren't") | |
2880 | : (inf->want_signals ? "will be" : "won't be")); | |
2881 | } | |
2882 | ||
c5aa993b | 2883 | static void |
c906108c SS |
2884 | set_exceptions_cmd (char *args, int from_tty) |
2885 | { | |
2886 | struct inf *inf = cur_inf (); | |
2887 | int val = parse_bool_arg (args, "set exceptions"); | |
2888 | ||
2889 | if (inf->task && inf->want_exceptions != val) | |
2890 | /* Make this take effect immediately in a running process. */ | |
c5aa993b | 2891 | /* XXX */ ; |
c906108c SS |
2892 | |
2893 | inf->want_exceptions = val; | |
2894 | } | |
2895 | ||
2896 | static void | |
2897 | show_exceptions_cmd (char *args, int from_tty) | |
2898 | { | |
2899 | struct inf *inf = cur_inf (); | |
2900 | check_empty (args, "show exceptions"); | |
2901 | printf_unfiltered ("Exceptions in the inferior %s trapped.\n", | |
2902 | inf->task | |
2903 | ? (inf->want_exceptions ? "are" : "aren't") | |
2904 | : (inf->want_exceptions ? "will be" : "won't be")); | |
2905 | } | |
942fd805 | 2906 | |
c906108c SS |
2907 | \f |
2908 | static void | |
2909 | set_task_cmd (char *args, int from_tty) | |
2910 | { | |
942fd805 MK |
2911 | printf_unfiltered ("\"set task\" must be followed by the name" |
2912 | " of a task property.\n"); | |
c906108c SS |
2913 | } |
2914 | ||
2915 | static void | |
2916 | show_task_cmd (char *args, int from_tty) | |
2917 | { | |
2918 | struct inf *inf = cur_inf (); | |
2919 | ||
2920 | check_empty (args, "show task"); | |
2921 | ||
2922 | show_signals_cmd (0, from_tty); | |
2923 | show_exceptions_cmd (0, from_tty); | |
2924 | show_task_pause_cmd (0, from_tty); | |
2925 | ||
2926 | if (inf->pause_sc == 0) | |
2927 | show_thread_default_pause_cmd (0, from_tty); | |
2928 | show_thread_default_run_cmd (0, from_tty); | |
2929 | ||
2930 | if (inf->task) | |
2931 | { | |
2932 | show_stopped_cmd (0, from_tty); | |
2933 | show_sig_thread_cmd (0, from_tty); | |
2934 | } | |
2935 | ||
2936 | if (inf->detach_sc != 0) | |
2937 | show_task_detach_sc_cmd (0, from_tty); | |
2938 | if (inf->default_thread_detach_sc != 0) | |
2939 | show_thread_default_detach_sc_cmd (0, from_tty); | |
2940 | } | |
942fd805 | 2941 | |
c906108c SS |
2942 | \f |
2943 | static void | |
2944 | set_noninvasive_cmd (char *args, int from_tty) | |
2945 | { | |
2946 | /* Invert the sense of the arg for each component. */ | |
2947 | char *inv_args = parse_bool_arg (args, "set noninvasive") ? "off" : "on"; | |
2948 | ||
2949 | set_task_pause_cmd (inv_args, from_tty); | |
2950 | set_signals_cmd (inv_args, from_tty); | |
2951 | set_exceptions_cmd (inv_args, from_tty); | |
2952 | } | |
942fd805 | 2953 | |
c906108c SS |
2954 | \f |
2955 | static void | |
2956 | info_port_rights (char *args, mach_port_type_t only) | |
2957 | { | |
2958 | struct inf *inf = active_inf (); | |
2959 | value_ptr vmark = value_mark (); | |
2960 | ||
2961 | if (args) | |
2962 | /* Explicit list of port rights. */ | |
2963 | { | |
2964 | while (*args) | |
2965 | { | |
2966 | value_ptr val = parse_to_comma_and_eval (&args); | |
2967 | long right = value_as_long (val); | |
2968 | error_t err = | |
c5aa993b JM |
2969 | print_port_info (right, 0, inf->task->port, PORTINFO_DETAILS, |
2970 | stdout); | |
c906108c SS |
2971 | if (err) |
2972 | error ("%ld: %s.", right, strerror (err)); | |
2973 | } | |
2974 | } | |
2975 | else | |
2976 | /* Print all of them. */ | |
2977 | { | |
2978 | error_t err = | |
c5aa993b JM |
2979 | print_task_ports_info (inf->task->port, only, PORTINFO_DETAILS, |
2980 | stdout); | |
c906108c SS |
2981 | if (err) |
2982 | error ("%s.", strerror (err)); | |
2983 | } | |
2984 | ||
2985 | value_free_to_mark (vmark); | |
2986 | } | |
2987 | ||
2988 | static void | |
2989 | info_send_rights_cmd (char *args, int from_tty) | |
2990 | { | |
2991 | info_port_rights (args, MACH_PORT_TYPE_SEND); | |
2992 | } | |
942fd805 | 2993 | |
c906108c SS |
2994 | static void |
2995 | info_recv_rights_cmd (char *args, int from_tty) | |
2996 | { | |
2997 | info_port_rights (args, MACH_PORT_TYPE_RECEIVE); | |
2998 | } | |
942fd805 | 2999 | |
c906108c SS |
3000 | static void |
3001 | info_port_sets_cmd (char *args, int from_tty) | |
3002 | { | |
3003 | info_port_rights (args, MACH_PORT_TYPE_PORT_SET); | |
3004 | } | |
942fd805 | 3005 | |
c906108c SS |
3006 | static void |
3007 | info_dead_names_cmd (char *args, int from_tty) | |
3008 | { | |
3009 | info_port_rights (args, MACH_PORT_TYPE_DEAD_NAME); | |
3010 | } | |
942fd805 | 3011 | |
c906108c SS |
3012 | static void |
3013 | info_port_rights_cmd (char *args, int from_tty) | |
3014 | { | |
3015 | info_port_rights (args, ~0); | |
3016 | } | |
942fd805 | 3017 | |
c906108c | 3018 | \f |
c5aa993b | 3019 | static void |
942fd805 | 3020 | add_task_commands (void) |
c906108c SS |
3021 | { |
3022 | add_cmd ("pause", class_run, set_thread_default_pause_cmd, | |
942fd805 MK |
3023 | "Set whether the new threads are suspended while gdb has control.\n\ |
3024 | This property normally has no effect because the whole task is\n\ | |
3025 | suspended, however, that may be disabled with \"set task pause off\".\n\ | |
3026 | The default value is \"off\".", | |
c906108c SS |
3027 | &set_thread_default_cmd_list); |
3028 | add_cmd ("pause", no_class, show_thread_default_pause_cmd, | |
3029 | "Show whether new threads are suspended while gdb has control.", | |
3030 | &show_thread_default_cmd_list); | |
942fd805 | 3031 | |
c906108c | 3032 | add_cmd ("run", class_run, set_thread_default_run_cmd, |
942fd805 MK |
3033 | "Set whether new threads are allowed to run \ |
3034 | (once gdb has noticed them).", | |
c906108c SS |
3035 | &set_thread_default_cmd_list); |
3036 | add_cmd ("run", no_class, show_thread_default_run_cmd, | |
942fd805 MK |
3037 | "Show whether new threads are allowed to run \ |
3038 | (once gdb has noticed them).", | |
c906108c | 3039 | &show_thread_default_cmd_list); |
942fd805 | 3040 | |
c906108c SS |
3041 | add_cmd ("detach-suspend-count", class_run, set_thread_default_detach_sc_cmd, |
3042 | "Set the default detach-suspend-count value for new threads.", | |
3043 | &set_thread_default_cmd_list); | |
3044 | add_cmd ("detach-suspend-count", no_class, show_thread_default_detach_sc_cmd, | |
3045 | "Show the default detach-suspend-count value for new threads.", | |
3046 | &show_thread_default_cmd_list); | |
3047 | ||
3048 | add_cmd ("signals", class_run, set_signals_cmd, | |
942fd805 MK |
3049 | "Set whether the inferior process's signals will be intercepted.\n\ |
3050 | Mach exceptions (such as breakpoint traps) are not affected.", | |
c906108c SS |
3051 | &setlist); |
3052 | add_alias_cmd ("sigs", "signals", class_run, 1, &setlist); | |
3053 | add_cmd ("signals", no_class, show_signals_cmd, | |
942fd805 | 3054 | "Show whether the inferior process's signals will be intercepted.", |
c906108c SS |
3055 | &showlist); |
3056 | add_alias_cmd ("sigs", "signals", no_class, 1, &showlist); | |
3057 | ||
3058 | add_cmd ("signal-thread", class_run, set_sig_thread_cmd, | |
942fd805 MK |
3059 | "Set the thread that gdb thinks is the libc signal thread.\n\ |
3060 | This thread is run when delivering a signal to a non-stopped process.", | |
c906108c SS |
3061 | &setlist); |
3062 | add_alias_cmd ("sigthread", "signal-thread", class_run, 1, &setlist); | |
3063 | add_cmd ("signal-thread", no_class, show_sig_thread_cmd, | |
3064 | "Set the thread that gdb thinks is the libc signal thread.", | |
3065 | &showlist); | |
3066 | add_alias_cmd ("sigthread", "signal-thread", no_class, 1, &showlist); | |
3067 | ||
3068 | add_cmd ("stopped", class_run, set_stopped_cmd, | |
942fd805 MK |
3069 | "Set whether gdb thinks the inferior process is stopped \ |
3070 | as with SIGSTOP.\n\ | |
3071 | Stopped process will be continued by sending them a signal.", | |
c906108c SS |
3072 | &setlist); |
3073 | add_cmd ("stopped", no_class, show_signals_cmd, | |
942fd805 MK |
3074 | "Show whether gdb thinks the inferior process is stopped \ |
3075 | as with SIGSTOP.", | |
c906108c SS |
3076 | &showlist); |
3077 | ||
3078 | add_cmd ("exceptions", class_run, set_exceptions_cmd, | |
942fd805 MK |
3079 | "Set whether exceptions in the inferior process will be trapped.\n\ |
3080 | When exceptions are turned off, neither breakpoints nor single-stepping\n\ | |
3081 | will work.", | |
c906108c SS |
3082 | &setlist); |
3083 | /* Allow `set exc' despite conflict with `set exception-port'. */ | |
3084 | add_alias_cmd ("exc", "exceptions", class_run, 1, &setlist); | |
3085 | add_cmd ("exceptions", no_class, show_exceptions_cmd, | |
942fd805 | 3086 | "Show whether exceptions in the inferior process will be trapped.", |
c906108c SS |
3087 | &showlist); |
3088 | ||
3089 | add_prefix_cmd ("task", no_class, set_task_cmd, | |
3090 | "Command prefix for setting task attributes.", | |
3091 | &set_task_cmd_list, "set task ", 0, &setlist); | |
3092 | add_prefix_cmd ("task", no_class, show_task_cmd, | |
3093 | "Command prefix for showing task attributes.", | |
3094 | &show_task_cmd_list, "show task ", 0, &showlist); | |
3095 | ||
3096 | add_cmd ("pause", class_run, set_task_pause_cmd, | |
942fd805 MK |
3097 | "Set whether the task is suspended while gdb has control.\n\ |
3098 | A value of \"on\" takes effect immediately, otherwise nothing happens\n\ | |
3099 | until the next time the program is continued.\n\ | |
3100 | When setting this to \"off\", \"set thread default pause on\" can be\n\ | |
3101 | used to pause individual threads by default instead.", | |
c906108c SS |
3102 | &set_task_cmd_list); |
3103 | add_cmd ("pause", no_class, show_task_pause_cmd, | |
3104 | "Show whether the task is suspended while gdb has control.", | |
3105 | &show_task_cmd_list); | |
942fd805 | 3106 | |
c906108c SS |
3107 | add_cmd ("detach-suspend-count", class_run, set_task_detach_sc_cmd, |
3108 | "Set the suspend count will leave on the thread when detaching.", | |
3109 | &set_task_cmd_list); | |
3110 | add_cmd ("detach-suspend-count", no_class, show_task_detach_sc_cmd, | |
3111 | "Show the suspend count will leave on the thread when detaching.", | |
3112 | &show_task_cmd_list); | |
3113 | ||
3114 | add_cmd ("exception-port", no_class, set_task_exc_port_cmd, | |
942fd805 MK |
3115 | "Set the task exception port to which we forward exceptions.\n\ |
3116 | The argument should be the value of the send right in the task.", | |
c906108c SS |
3117 | &set_task_cmd_list); |
3118 | add_alias_cmd ("excp", "exception-port", no_class, 1, &set_task_cmd_list); | |
942fd805 MK |
3119 | add_alias_cmd ("exc-port", "exception-port", no_class, 1, |
3120 | &set_task_cmd_list); | |
c906108c SS |
3121 | |
3122 | /* A convenient way of turning on all options require to noninvasively | |
3123 | debug running tasks. */ | |
3124 | add_cmd ("noninvasive", no_class, set_noninvasive_cmd, | |
942fd805 MK |
3125 | "Set task options so that we interfere as little as possible.\n\ |
3126 | This is the same as setting `task pause', `exceptions', and\n\ | |
3127 | `signals' to the opposite value.", | |
c906108c SS |
3128 | &setlist); |
3129 | ||
3130 | /* Commands to show information about the task's ports. */ | |
3131 | add_cmd ("send-rights", class_info, info_send_rights_cmd, | |
3132 | "Show information about the task's send rights", | |
3133 | &infolist); | |
3134 | add_cmd ("receive-rights", class_info, info_recv_rights_cmd, | |
3135 | "Show information about the task's receive rights", | |
3136 | &infolist); | |
942fd805 | 3137 | add_cmd ("port-rights", class_info, info_port_rights_cmd, |
c906108c SS |
3138 | "Show information about the task's port rights", |
3139 | &infolist); | |
3140 | add_cmd ("port-sets", class_info, info_port_sets_cmd, | |
3141 | "Show information about the task's port sets", | |
3142 | &infolist); | |
3143 | add_cmd ("dead-names", class_info, info_dead_names_cmd, | |
3144 | "Show information about the task's dead names", | |
3145 | &infolist); | |
3146 | add_info_alias ("ports", "port-rights", 1); | |
3147 | add_info_alias ("port", "port-rights", 1); | |
3148 | add_info_alias ("psets", "port-sets", 1); | |
3149 | } | |
c906108c | 3150 | |
942fd805 | 3151 | \f |
c906108c SS |
3152 | static void |
3153 | set_thread_pause_cmd (char *args, int from_tty) | |
3154 | { | |
3155 | struct proc *thread = cur_thread (); | |
3156 | int old_sc = thread->pause_sc; | |
3157 | thread->pause_sc = parse_bool_arg (args, "set thread pause"); | |
3158 | if (old_sc == 0 && thread->pause_sc != 0 && thread->inf->pause_sc == 0) | |
3159 | /* If the task is currently unsuspended, immediately suspend it, | |
3160 | otherwise wait until the next time it gets control. */ | |
3161 | inf_suspend (thread->inf); | |
3162 | } | |
3163 | ||
3164 | static void | |
3165 | show_thread_pause_cmd (char *args, int from_tty) | |
3166 | { | |
3167 | struct proc *thread = cur_thread (); | |
3168 | int sc = thread->pause_sc; | |
3169 | check_empty (args, "show task pause"); | |
3170 | printf_unfiltered ("Thread %s %s suspended while gdb has control%s.\n", | |
3171 | proc_string (thread), | |
3172 | sc ? "is" : "isn't", | |
942fd805 | 3173 | !sc && thread->inf->pause_sc ? " (but the task is)" : ""); |
c906108c SS |
3174 | } |
3175 | ||
3176 | static void | |
3177 | set_thread_run_cmd (char *args, int from_tty) | |
3178 | { | |
3179 | struct proc *thread = cur_thread (); | |
3180 | thread->run_sc = parse_bool_arg (args, "set thread run") ? 0 : 1; | |
3181 | } | |
3182 | ||
3183 | static void | |
3184 | show_thread_run_cmd (char *args, int from_tty) | |
3185 | { | |
3186 | struct proc *thread = cur_thread (); | |
3187 | check_empty (args, "show thread run"); | |
3188 | printf_unfiltered ("Thread %s %s allowed to run.", | |
3189 | proc_string (thread), | |
3190 | thread->run_sc == 0 ? "is" : "isn't"); | |
3191 | } | |
3192 | ||
3193 | static void | |
3194 | set_thread_detach_sc_cmd (char *args, int from_tty) | |
3195 | { | |
942fd805 MK |
3196 | cur_thread ()->detach_sc = parse_int_arg (args, |
3197 | "set thread detach-suspend-count"); | |
c906108c SS |
3198 | } |
3199 | ||
3200 | static void | |
3201 | show_thread_detach_sc_cmd (char *args, int from_tty) | |
3202 | { | |
3203 | struct proc *thread = cur_thread (); | |
3204 | check_empty (args, "show thread detach-suspend-count"); | |
942fd805 MK |
3205 | printf_unfiltered ("Thread %s will be left with a suspend count" |
3206 | " of %d when detaching.\n", | |
c906108c SS |
3207 | proc_string (thread), |
3208 | thread->detach_sc); | |
3209 | } | |
3210 | ||
3211 | static void | |
3212 | set_thread_exc_port_cmd (char *args, int from_tty) | |
3213 | { | |
3214 | struct proc *thread = cur_thread (); | |
3215 | if (!args) | |
3216 | error ("No argument to \"set thread exception-port\" command."); | |
3217 | steal_exc_port (thread, parse_and_eval_address (args)); | |
3218 | } | |
3219 | ||
3220 | #if 0 | |
3221 | static void | |
3222 | show_thread_cmd (char *args, int from_tty) | |
3223 | { | |
3224 | struct proc *thread = cur_thread (); | |
3225 | check_empty (args, "show thread"); | |
3226 | show_thread_run_cmd (0, from_tty); | |
3227 | show_thread_pause_cmd (0, from_tty); | |
3228 | if (thread->detach_sc != 0) | |
3229 | show_thread_detach_sc_cmd (0, from_tty); | |
3230 | } | |
3231 | #endif | |
3232 | ||
3233 | static void | |
3234 | thread_takeover_sc_cmd (char *args, int from_tty) | |
3235 | { | |
3236 | struct proc *thread = cur_thread (); | |
3237 | thread_basic_info_data_t _info; | |
3238 | thread_basic_info_t info = &_info; | |
3239 | mach_msg_type_number_t info_len = THREAD_BASIC_INFO_COUNT; | |
3240 | error_t err = | |
c5aa993b | 3241 | thread_info (thread->port, THREAD_BASIC_INFO, (int *) &info, &info_len); |
c906108c SS |
3242 | if (err) |
3243 | error ("%s.", strerror (err)); | |
3244 | thread->sc = info->suspend_count; | |
3245 | if (from_tty) | |
3246 | printf_unfiltered ("Suspend count was %d.\n", thread->sc); | |
3247 | if (info != &_info) | |
942fd805 MK |
3248 | vm_deallocate (mach_task_self (), (vm_address_t) info, |
3249 | info_len * sizeof (int)); | |
c906108c SS |
3250 | } |
3251 | ||
942fd805 MK |
3252 | \f |
3253 | static void | |
3254 | add_thread_commands (void) | |
c906108c SS |
3255 | { |
3256 | add_prefix_cmd ("thread", no_class, set_thread_cmd, | |
3257 | "Command prefix for setting thread properties.", | |
3258 | &set_thread_cmd_list, "set thread ", 0, &setlist); | |
3259 | add_prefix_cmd ("default", no_class, show_thread_cmd, | |
3260 | "Command prefix for setting default thread properties.", | |
3261 | &set_thread_default_cmd_list, "set thread default ", 0, | |
3262 | &set_thread_cmd_list); | |
3263 | add_prefix_cmd ("thread", no_class, set_thread_default_cmd, | |
3264 | "Command prefix for showing thread properties.", | |
3265 | &show_thread_cmd_list, "show thread ", 0, &showlist); | |
3266 | add_prefix_cmd ("default", no_class, show_thread_default_cmd, | |
3267 | "Command prefix for showing default thread properties.", | |
3268 | &show_thread_default_cmd_list, "show thread default ", 0, | |
3269 | &show_thread_cmd_list); | |
3270 | ||
3271 | add_cmd ("pause", class_run, set_thread_pause_cmd, | |
942fd805 MK |
3272 | "Set whether the current thread is suspended \ |
3273 | while gdb has control.\n\ | |
3274 | A value of \"on\" takes effect immediately, otherwise nothing happens\n\ | |
3275 | until the next time the program is continued. This property normally\n\ | |
3276 | has no effect because the whole task is suspended, however, that may\n\ | |
3277 | be disabled with \"set task pause off\".\n\ | |
3278 | The default value is \"off\".", | |
c906108c SS |
3279 | &set_thread_cmd_list); |
3280 | add_cmd ("pause", no_class, show_thread_pause_cmd, | |
942fd805 MK |
3281 | "Show whether the current thread is suspended \ |
3282 | while gdb has control.", | |
c906108c SS |
3283 | &show_thread_cmd_list); |
3284 | ||
3285 | add_cmd ("run", class_run, set_thread_run_cmd, | |
3286 | "Set whether the current thread is allowed to run.", | |
3287 | &set_thread_cmd_list); | |
3288 | add_cmd ("run", no_class, show_thread_run_cmd, | |
3289 | "Show whether the current thread is allowed to run.", | |
3290 | &show_thread_cmd_list); | |
3291 | ||
3292 | add_cmd ("detach-suspend-count", class_run, set_thread_detach_sc_cmd, | |
942fd805 MK |
3293 | "Set the suspend count will leave on the thread when detaching.\n\ |
3294 | Note that this is relative to suspend count when gdb noticed the thread;\n\ | |
3295 | use the `thread takeover-suspend-count' to force it to an absolute value.", | |
c906108c SS |
3296 | &set_thread_cmd_list); |
3297 | add_cmd ("detach-suspend-count", no_class, show_thread_detach_sc_cmd, | |
942fd805 MK |
3298 | "Show the suspend count will leave on the thread when detaching.\n\ |
3299 | Note that this is relative to suspend count when gdb noticed the thread;\n\ | |
3300 | use the `thread takeover-suspend-count' to force it to an absolute value.", | |
c906108c SS |
3301 | &show_thread_cmd_list); |
3302 | ||
3303 | add_cmd ("exception-port", no_class, set_thread_exc_port_cmd, | |
942fd805 MK |
3304 | "Set the thread exception port to which we forward exceptions.\n\ |
3305 | This overrides the task exception port.\n\ | |
3306 | The argument should be the value of the send right in the task.", | |
c906108c SS |
3307 | &set_thread_cmd_list); |
3308 | add_alias_cmd ("excp", "exception-port", no_class, 1, &set_thread_cmd_list); | |
942fd805 MK |
3309 | add_alias_cmd ("exc-port", "exception-port", no_class, 1, |
3310 | &set_thread_cmd_list); | |
c906108c SS |
3311 | |
3312 | add_cmd ("takeover-suspend-count", no_class, thread_takeover_sc_cmd, | |
942fd805 MK |
3313 | "Force the threads absolute suspend-count to be gdb's.\n\ |
3314 | Prior to giving this command, gdb's thread suspend-counts are relative\n\ | |
3315 | to the thread's initial suspend-count when gdb notices the threads.", | |
c906108c SS |
3316 | &thread_cmd_list); |
3317 | } | |
942fd805 | 3318 | |
c906108c SS |
3319 | \f |
3320 | void | |
942fd805 | 3321 | _initialize_gnu_nat (void) |
c906108c SS |
3322 | { |
3323 | proc_server = getproc (); | |
942fd805 | 3324 | |
c5aa993b | 3325 | init_gnu_ops (); |
c906108c | 3326 | add_target (&gnu_ops); |
942fd805 | 3327 | |
c906108c SS |
3328 | add_task_commands (); |
3329 | add_thread_commands (); | |
c906108c | 3330 | add_set_cmd ("gnu-debug", class_maintenance, |
c5aa993b | 3331 | var_boolean, (char *) &gnu_debug_flag, |
942fd805 | 3332 | "Set debugging output for the gnu backend.", &maintenancelist); |
c906108c SS |
3333 | } |
3334 | \f | |
3335 | #ifdef FLUSH_INFERIOR_CACHE | |
3336 | ||
3337 | /* When over-writing code on some machines the I-Cache must be flushed | |
3338 | explicitly, because it is not kept coherent by the lazy hardware. | |
3339 | This definitely includes breakpoints, for instance, or else we | |
3340 | end up looping in mysterious Bpt traps */ | |
3341 | ||
3342 | void | |
fba45db2 | 3343 | flush_inferior_icache (CORE_ADDR pc, int amount) |
c906108c SS |
3344 | { |
3345 | vm_machine_attribute_val_t flush = MATTR_VAL_ICACHE_FLUSH; | |
c5aa993b JM |
3346 | error_t ret; |
3347 | ||
c906108c SS |
3348 | ret = vm_machine_attribute (current_inferior->task->port, |
3349 | pc, | |
3350 | amount, | |
3351 | MATTR_CACHE, | |
3352 | &flush); | |
3353 | if (ret != KERN_SUCCESS) | |
3354 | warning ("Error flushing inferior's cache : %s", strerror (ret)); | |
3355 | } | |
c5aa993b | 3356 | #endif /* FLUSH_INFERIOR_CACHE */ |