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da59e081 | 1 | /* Interface GDB to the GNU Hurd. |
cce74817 | 2 | Copyright (C) 1992, 1995, 1996, 1997, 1999 Free Software Foundation, Inc. |
c906108c SS |
3 | |
4 | This file is part of GDB. | |
5 | ||
6 | Written by Miles Bader <miles@gnu.ai.mit.edu> | |
7 | ||
8 | Some code and ideas from m3-nat.c by Jukka Virtanen <jtv@hut.fi> | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program; if not, write to the Free Software | |
c5aa993b JM |
22 | Foundation, Inc., 59 Temple Place - Suite 330, |
23 | Boston, MA 02111-1307, USA. | |
24 | */ | |
c906108c SS |
25 | |
26 | #include <stdio.h> | |
7a292a7a | 27 | #include <string.h> |
c906108c SS |
28 | #include <errno.h> |
29 | #include <signal.h> | |
30 | #include <assert.h> | |
31 | #include <setjmp.h> | |
32 | #include <limits.h> | |
33 | #include <sys/ptrace.h> | |
34 | ||
35 | /* We include this because we don't need the access macros and they conflict | |
36 | with gdb's definitions (ick). This is very non standard! */ | |
7a292a7a SS |
37 | #define _SYS_WAIT_H /* Inhibit warning from <bits/waitflags.h>. */ |
38 | #include <bits/waitflags.h> | |
c906108c SS |
39 | |
40 | #include <mach.h> | |
41 | #include <mach/message.h> | |
42 | #include <mach/notify.h> | |
43 | #include <mach_error.h> | |
44 | #include <mach/exception.h> | |
45 | #include <mach/vm_attributes.h> | |
46 | ||
47 | #include <hurd/process.h> | |
48 | #include <hurd/process_request.h> | |
49 | #include <hurd/msg.h> | |
50 | #include <hurd/msg_request.h> | |
51 | #include <hurd/signal.h> | |
52 | #include <hurd/interrupt.h> | |
53 | #include <hurd/sigpreempt.h> | |
54 | ||
55 | #include <portinfo.h> | |
56 | ||
57 | #include "defs.h" | |
58 | #include "inferior.h" | |
59 | #include "symtab.h" | |
60 | #include "value.h" | |
61 | #include "language.h" | |
62 | #include "target.h" | |
03f2053f | 63 | #include "gdb_wait.h" |
c906108c SS |
64 | #include "gdbcmd.h" |
65 | #include "gdbcore.h" | |
66 | ||
67 | #include "gnu-nat.h" | |
68 | ||
69 | #include "exc_request_S.h" | |
70 | #include "notify_S.h" | |
71 | #include "process_reply_S.h" | |
72 | #include "msg_reply_S.h" | |
73 | #include "exc_request_U.h" | |
74 | #include "msg_U.h" | |
75 | ||
76 | static process_t proc_server = MACH_PORT_NULL; | |
77 | ||
78 | /* If we've sent a proc_wait_request to the proc server, the pid of the | |
79 | process we asked about. We can only ever have one outstanding. */ | |
80 | int proc_wait_pid = 0; | |
81 | ||
82 | /* The number of wait requests we've sent, and expect replies from. */ | |
83 | int proc_waits_pending = 0; | |
84 | ||
85 | int gnu_debug_flag = 0; | |
86 | ||
87 | /* Forward decls */ | |
88 | ||
89 | extern struct target_ops gnu_ops; | |
c906108c | 90 | |
c906108c SS |
91 | struct inf *make_inf (); |
92 | void inf_clear_wait (struct inf *inf); | |
93 | void inf_cleanup (struct inf *inf); | |
94 | void inf_startup (struct inf *inf, int pid); | |
95 | int inf_update_suspends (struct inf *inf); | |
96 | void inf_set_pid (struct inf *inf, pid_t pid); | |
97 | void inf_validate_procs (struct inf *inf); | |
98 | void inf_steal_exc_ports (struct inf *inf); | |
99 | void inf_restore_exc_ports (struct inf *inf); | |
100 | struct proc *inf_tid_to_proc (struct inf *inf, int tid); | |
c5aa993b JM |
101 | inline void inf_set_threads_resume_sc (struct inf *inf, |
102 | struct proc *run_thread, | |
c906108c SS |
103 | int run_others); |
104 | inline int inf_set_threads_resume_sc_for_signal_thread (struct inf *inf); | |
105 | inline void inf_suspend (struct inf *inf); | |
106 | inline void inf_resume (struct inf *inf); | |
107 | void inf_set_step_thread (struct inf *inf, struct proc *proc); | |
108 | void inf_detach (struct inf *inf); | |
109 | void inf_attach (struct inf *inf, int pid); | |
110 | void inf_signal (struct inf *inf, enum target_signal sig); | |
cce74817 | 111 | void inf_continue (struct inf *inf); |
c906108c SS |
112 | |
113 | #define inf_debug(_inf, msg, args...) \ | |
114 | do { struct inf *__inf = (_inf); \ | |
115 | debug ("{inf %d %p}: " msg, __inf->pid, __inf , ##args); } while (0) | |
116 | ||
117 | void proc_abort (struct proc *proc, int force); | |
c906108c SS |
118 | struct proc *make_proc (struct inf *inf, mach_port_t port, int tid); |
119 | struct proc *_proc_free (struct proc *proc); | |
120 | int proc_update_sc (struct proc *proc); | |
c5aa993b | 121 | error_t proc_get_exception_port (struct proc *proc, mach_port_t * port); |
c906108c SS |
122 | error_t proc_set_exception_port (struct proc *proc, mach_port_t port); |
123 | static mach_port_t _proc_get_exc_port (struct proc *proc); | |
124 | void proc_steal_exc_port (struct proc *proc, mach_port_t exc_port); | |
125 | void proc_restore_exc_port (struct proc *proc); | |
126 | int proc_trace (struct proc *proc, int set); | |
c906108c SS |
127 | |
128 | /* Evaluate RPC_EXPR in a scope with the variables MSGPORT and REFPORT bound | |
129 | to INF's msg port and task port respectively. If it has no msg port, | |
130 | EIEIO is returned. INF must refer to a running process! */ | |
131 | #define INF_MSGPORT_RPC(inf, rpc_expr) \ | |
132 | HURD_MSGPORT_RPC (proc_getmsgport (proc_server, inf->pid, &msgport), \ | |
133 | (refport = inf->task->port, 0), 0, \ | |
134 | msgport ? (rpc_expr) : EIEIO) | |
135 | ||
136 | /* Like INF_MSGPORT_RPC, but will also resume the signal thread to ensure | |
137 | there's someone around to deal with the RPC (and resuspend things | |
138 | afterwards). This effects INF's threads' resume_sc count. */ | |
139 | #define INF_RESUME_MSGPORT_RPC(inf, rpc_expr) \ | |
140 | (inf_set_threads_resume_sc_for_signal_thread (inf) \ | |
141 | ? ({ error_t __e; \ | |
142 | inf_resume (inf); \ | |
143 | __e = INF_MSGPORT_RPC (inf, rpc_expr); \ | |
144 | inf_suspend (inf); \ | |
145 | __e; }) \ | |
146 | : EIEIO) | |
147 | ||
c5aa993b | 148 | #define MIG_SERVER_DIED EMIG_SERVER_DIED /* XXX */ |
c906108c SS |
149 | \f |
150 | /* The state passed by an exception message. */ | |
151 | struct exc_state | |
c5aa993b JM |
152 | { |
153 | int exception; /* The exception code */ | |
154 | int code, subcode; | |
155 | mach_port_t handler; /* The real exception port to handle this. */ | |
156 | mach_port_t reply; /* The reply port from the exception call. */ | |
157 | }; | |
c906108c SS |
158 | |
159 | /* The results of the last wait an inf did. */ | |
160 | struct inf_wait | |
c5aa993b JM |
161 | { |
162 | struct target_waitstatus status; /* The status returned to gdb. */ | |
163 | struct exc_state exc; /* The exception that caused us to return. */ | |
164 | struct proc *thread; /* The thread in question. */ | |
165 | int suppress; /* Something trivial happened. */ | |
166 | }; | |
c906108c SS |
167 | |
168 | /* The state of an inferior. */ | |
169 | struct inf | |
c5aa993b JM |
170 | { |
171 | /* Fields describing the current inferior. */ | |
c906108c | 172 | |
c5aa993b JM |
173 | struct proc *task; /* The mach task. */ |
174 | struct proc *threads; /* A linked list of all threads in TASK. */ | |
c906108c | 175 | |
c5aa993b JM |
176 | /* True if THREADS needn't be validated by querying the task. We assume that |
177 | we and the task in question are the only ones frobbing the thread list, | |
178 | so as long as we don't let any code run, we don't have to worry about | |
179 | THREADS changing. */ | |
180 | int threads_up_to_date; | |
c906108c | 181 | |
c5aa993b | 182 | pid_t pid; /* The real system PID. */ |
c906108c | 183 | |
c5aa993b | 184 | struct inf_wait wait; /* What to return from target_wait. */ |
c906108c | 185 | |
c5aa993b JM |
186 | /* One thread proc in INF may be in `single-stepping mode'. This is it. */ |
187 | struct proc *step_thread; | |
c906108c | 188 | |
c5aa993b JM |
189 | /* The thread we think is the signal thread. */ |
190 | struct proc *signal_thread; | |
c906108c | 191 | |
c5aa993b | 192 | mach_port_t event_port; /* Where we receive various msgs. */ |
c906108c | 193 | |
c5aa993b JM |
194 | /* True if we think at least one thread in the inferior could currently be |
195 | running. */ | |
196 | unsigned int running:1; | |
c906108c | 197 | |
c5aa993b JM |
198 | /* True if the process has stopped (in the proc server sense). Note that |
199 | since a proc server `stop' leaves the signal thread running, the inf can | |
200 | be RUNNING && STOPPED... */ | |
201 | unsigned int stopped:1; | |
cce74817 | 202 | |
c5aa993b JM |
203 | /* True if the inferior has no message port. */ |
204 | unsigned int nomsg:1; | |
c906108c | 205 | |
c5aa993b JM |
206 | /* True if the inferior is traced. */ |
207 | unsigned int traced:1; | |
c906108c | 208 | |
c5aa993b JM |
209 | /* True if we shouldn't try waiting for the inferior, usually because we |
210 | can't for some reason. */ | |
211 | unsigned int no_wait:1; | |
c906108c | 212 | |
c5aa993b JM |
213 | /* When starting a new inferior, we don't try to validate threads until all |
214 | the proper execs have been done. This is a count of how many execs we | |
215 | expect to happen. */ | |
216 | unsigned pending_execs; | |
c906108c | 217 | |
c5aa993b | 218 | /* Fields describing global state */ |
c906108c | 219 | |
c5aa993b JM |
220 | /* The task suspend count used when gdb has control. This is normally 1 to |
221 | make things easier for us, but sometimes (like when attaching to vital | |
222 | system servers) it may be desirable to let the task continue to run | |
223 | (pausing individual threads as necessary). */ | |
224 | int pause_sc; | |
c906108c | 225 | |
c5aa993b JM |
226 | /* The task suspend count left when detaching from a task. */ |
227 | int detach_sc; | |
c906108c | 228 | |
c5aa993b JM |
229 | /* The initial values used for the run_sc and pause_sc of newly discovered |
230 | threads -- see the definition of those fields in struct proc. */ | |
231 | int default_thread_run_sc; | |
232 | int default_thread_pause_sc; | |
233 | int default_thread_detach_sc; | |
c906108c | 234 | |
c5aa993b JM |
235 | /* True if the process should be traced when started/attached. Newly |
236 | started processes *must* be traced at first to exec them properly, but | |
237 | if this is false, tracing is turned off as soon it has done so. */ | |
238 | int want_signals; | |
c906108c | 239 | |
c5aa993b JM |
240 | /* True if exceptions from the inferior process should be trapped. This |
241 | must be on to use breakpoints. */ | |
242 | int want_exceptions; | |
243 | }; | |
c906108c SS |
244 | |
245 | ||
c5aa993b JM |
246 | int |
247 | __proc_pid (struct proc *proc) | |
c906108c SS |
248 | { |
249 | return proc->inf->pid; | |
250 | } | |
251 | \f | |
252 | /* Update PROC's real suspend count to match it's desired one. Returns true | |
253 | if we think PROC is now in a runnable state. */ | |
254 | int | |
255 | proc_update_sc (struct proc *proc) | |
256 | { | |
257 | int running; | |
c5aa993b | 258 | int err = 0; |
c906108c SS |
259 | int delta = proc->sc - proc->cur_sc; |
260 | ||
261 | if (delta) | |
262 | proc_debug (proc, "sc: %d --> %d", proc->cur_sc, proc->sc); | |
263 | ||
264 | if (proc->sc == 0 && proc->state_changed) | |
265 | /* Since PROC may start running, we must write back any state changes. */ | |
266 | { | |
267 | assert (proc_is_thread (proc)); | |
268 | proc_debug (proc, "storing back changed thread state"); | |
269 | err = thread_set_state (proc->port, THREAD_STATE_FLAVOR, | |
c5aa993b JM |
270 | (thread_state_t) & proc->state, THREAD_STATE_SIZE); |
271 | if (!err) | |
c906108c SS |
272 | proc->state_changed = 0; |
273 | } | |
274 | ||
275 | if (delta > 0) | |
276 | while (delta-- > 0 && !err) | |
277 | if (proc_is_task (proc)) | |
278 | err = task_suspend (proc->port); | |
279 | else | |
280 | err = thread_suspend (proc->port); | |
281 | else | |
282 | while (delta++ < 0 && !err) | |
283 | if (proc_is_task (proc)) | |
284 | err = task_resume (proc->port); | |
285 | else | |
286 | err = thread_resume (proc->port); | |
287 | ||
c5aa993b | 288 | if (!err) |
c906108c SS |
289 | proc->cur_sc = proc->sc; |
290 | ||
291 | /* If we got an error, then the task/thread has disappeared. */ | |
292 | running = !err && proc->sc == 0; | |
293 | ||
294 | proc_debug (proc, "is %s", err ? "dead" : running ? "running" : "suspended"); | |
295 | if (err) | |
296 | proc_debug (proc, "err = %s", strerror (err)); | |
297 | ||
298 | if (running) | |
299 | { | |
300 | proc->aborted = 0; | |
301 | proc->state_valid = proc->state_changed = 0; | |
302 | proc->fetched_regs = 0; | |
303 | } | |
304 | ||
305 | return running; | |
306 | } | |
307 | \f | |
308 | /* Thread_abort is called on PROC if needed. PROC must be a thread proc. | |
309 | If PROC is deemed `precious', then nothing is done unless FORCE is true. | |
310 | In particular, a thread is precious if it's running (in which case forcing | |
311 | it includes suspending it first), or if it has an exception pending. */ | |
312 | void | |
313 | proc_abort (struct proc *proc, int force) | |
314 | { | |
315 | assert (proc_is_thread (proc)); | |
316 | ||
c5aa993b | 317 | if (!proc->aborted) |
c906108c SS |
318 | { |
319 | struct inf *inf = proc->inf; | |
320 | int running = (proc->cur_sc == 0 && inf->task->cur_sc == 0); | |
321 | ||
322 | if (running && force) | |
323 | { | |
324 | proc->sc = 1; | |
325 | inf_update_suspends (proc->inf); | |
326 | running = 0; | |
327 | warning ("Stopped %s.", proc_string (proc)); | |
328 | } | |
329 | else if (proc == inf->wait.thread && inf->wait.exc.reply && !force) | |
330 | /* An exception is pending on PROC, which don't mess with. */ | |
331 | running = 1; | |
332 | ||
c5aa993b | 333 | if (!running) |
c906108c SS |
334 | /* We only abort the thread if it's not actually running. */ |
335 | { | |
336 | thread_abort (proc->port); | |
337 | proc_debug (proc, "aborted"); | |
338 | proc->aborted = 1; | |
339 | } | |
340 | else | |
341 | proc_debug (proc, "not aborting"); | |
342 | } | |
343 | } | |
344 | ||
345 | /* Make sure that the state field in PROC is up to date, and return a pointer | |
346 | to it, or 0 if something is wrong. If WILL_MODIFY is true, makes sure | |
347 | that the thread is stopped and aborted first, and sets the state_changed | |
348 | field in PROC to true. */ | |
349 | thread_state_t | |
350 | proc_get_state (struct proc *proc, int will_modify) | |
351 | { | |
352 | int was_aborted = proc->aborted; | |
353 | ||
354 | proc_debug (proc, "updating state info%s", | |
355 | will_modify ? " (with intention to modify)" : ""); | |
356 | ||
357 | proc_abort (proc, will_modify); | |
358 | ||
c5aa993b | 359 | if (!was_aborted && proc->aborted) |
c906108c SS |
360 | /* PROC's state may have changed since we last fetched it. */ |
361 | proc->state_valid = 0; | |
362 | ||
c5aa993b | 363 | if (!proc->state_valid) |
c906108c SS |
364 | { |
365 | mach_msg_type_number_t state_size = THREAD_STATE_SIZE; | |
366 | error_t err = | |
c5aa993b JM |
367 | thread_get_state (proc->port, THREAD_STATE_FLAVOR, |
368 | (thread_state_t) & proc->state, &state_size); | |
c906108c SS |
369 | proc_debug (proc, "getting thread state"); |
370 | proc->state_valid = !err; | |
371 | } | |
372 | ||
373 | if (proc->state_valid) | |
374 | { | |
375 | if (will_modify) | |
376 | proc->state_changed = 1; | |
c5aa993b | 377 | return (thread_state_t) & proc->state; |
c906108c SS |
378 | } |
379 | else | |
380 | return 0; | |
381 | } | |
382 | \f | |
383 | /* Set PORT to PROC's exception port. */ | |
384 | error_t | |
c5aa993b | 385 | proc_get_exception_port (struct proc * proc, mach_port_t * port) |
c906108c SS |
386 | { |
387 | if (proc_is_task (proc)) | |
388 | return task_get_exception_port (proc->port, port); | |
389 | else | |
390 | return thread_get_exception_port (proc->port, port); | |
391 | } | |
392 | ||
393 | /* Set PROC's exception port to PORT. */ | |
394 | error_t | |
c5aa993b | 395 | proc_set_exception_port (struct proc * proc, mach_port_t port) |
c906108c SS |
396 | { |
397 | proc_debug (proc, "setting exception port: %d", port); | |
398 | if (proc_is_task (proc)) | |
399 | return task_set_exception_port (proc->port, port); | |
400 | else | |
401 | return thread_set_exception_port (proc->port, port); | |
402 | } | |
403 | ||
404 | /* Get PROC's exception port, cleaning up a bit if proc has died. */ | |
405 | static mach_port_t | |
406 | _proc_get_exc_port (struct proc *proc) | |
407 | { | |
408 | mach_port_t exc_port; | |
409 | error_t err = proc_get_exception_port (proc, &exc_port); | |
410 | ||
411 | if (err) | |
412 | /* PROC must be dead. */ | |
413 | { | |
414 | if (proc->exc_port) | |
415 | mach_port_deallocate (mach_task_self (), proc->exc_port); | |
416 | proc->exc_port = MACH_PORT_NULL; | |
417 | if (proc->saved_exc_port) | |
418 | mach_port_deallocate (mach_task_self (), proc->saved_exc_port); | |
419 | proc->saved_exc_port = MACH_PORT_NULL; | |
420 | } | |
421 | ||
422 | return exc_port; | |
423 | } | |
424 | ||
425 | /* Replace PROC's exception port with EXC_PORT, unless it's already been | |
426 | done. Stash away any existing exception port so we can restore it later. */ | |
427 | void | |
428 | proc_steal_exc_port (struct proc *proc, mach_port_t exc_port) | |
429 | { | |
430 | mach_port_t cur_exc_port = _proc_get_exc_port (proc); | |
431 | ||
432 | if (cur_exc_port) | |
433 | { | |
434 | error_t err; | |
435 | ||
436 | proc_debug (proc, "inserting exception port: %d", exc_port); | |
437 | ||
438 | if (cur_exc_port != exc_port) | |
439 | /* Put in our exception port. */ | |
440 | err = proc_set_exception_port (proc, exc_port); | |
441 | ||
442 | if (err || cur_exc_port == proc->exc_port) | |
443 | /* We previously set the exception port, and it's still set. So we | |
444 | just keep the old saved port which is what the proc set. */ | |
445 | { | |
446 | if (cur_exc_port) | |
447 | mach_port_deallocate (mach_task_self (), cur_exc_port); | |
448 | } | |
449 | else | |
450 | /* Keep a copy of PROC's old exception port so it can be restored. */ | |
451 | { | |
452 | if (proc->saved_exc_port) | |
453 | mach_port_deallocate (mach_task_self (), proc->saved_exc_port); | |
454 | proc->saved_exc_port = cur_exc_port; | |
455 | } | |
456 | ||
457 | proc_debug (proc, "saved exception port: %d", proc->saved_exc_port); | |
458 | ||
459 | if (!err) | |
460 | proc->exc_port = exc_port; | |
461 | else | |
462 | warning ("Error setting exception port for %s: %s", | |
463 | proc_string (proc), strerror (err)); | |
464 | } | |
465 | } | |
466 | ||
467 | /* If we previously replaced PROC's exception port, put back what we | |
468 | found there at the time, unless *our* exception port has since been | |
469 | overwritten, in which case who knows what's going on. */ | |
470 | void | |
471 | proc_restore_exc_port (struct proc *proc) | |
472 | { | |
473 | mach_port_t cur_exc_port = _proc_get_exc_port (proc); | |
474 | ||
475 | if (cur_exc_port) | |
476 | { | |
477 | error_t err = 0; | |
478 | ||
479 | proc_debug (proc, "restoring real exception port"); | |
480 | ||
481 | if (proc->exc_port == cur_exc_port) | |
482 | /* Our's is still there. */ | |
483 | err = proc_set_exception_port (proc, proc->saved_exc_port); | |
484 | ||
485 | if (proc->saved_exc_port) | |
486 | mach_port_deallocate (mach_task_self (), proc->saved_exc_port); | |
487 | proc->saved_exc_port = MACH_PORT_NULL; | |
488 | ||
489 | if (!err) | |
490 | proc->exc_port = MACH_PORT_NULL; | |
491 | else | |
492 | warning ("Error setting exception port for %s: %s", | |
493 | proc_string (proc), strerror (err)); | |
494 | } | |
495 | } | |
496 | \f | |
497 | /* Turns hardware tracing in PROC on or off when SET is true or false, | |
498 | respectively. Returns true on success. */ | |
499 | int | |
500 | proc_trace (struct proc *proc, int set) | |
501 | { | |
502 | thread_state_t state = proc_get_state (proc, 1); | |
503 | ||
c5aa993b | 504 | if (!state) |
c906108c SS |
505 | return 0; /* the thread must be dead. */ |
506 | ||
507 | proc_debug (proc, "tracing %s", set ? "on" : "off"); | |
c5aa993b | 508 | |
c906108c SS |
509 | if (set) |
510 | { | |
511 | /* XXX We don't get the exception unless the thread has its own | |
c5aa993b | 512 | exception port???? */ |
c906108c SS |
513 | if (proc->exc_port == MACH_PORT_NULL) |
514 | proc_steal_exc_port (proc, proc->inf->event_port); | |
515 | THREAD_STATE_SET_TRACED (state); | |
516 | } | |
517 | else | |
518 | THREAD_STATE_CLEAR_TRACED (state); | |
519 | ||
520 | return 1; | |
521 | } | |
522 | \f | |
523 | /* A variable from which to assign new TIDs. */ | |
524 | static int next_thread_id = 1; | |
525 | ||
526 | /* Returns a new proc structure with the given fields. Also adds a | |
527 | notification for PORT becoming dead to be sent to INF's notify port. */ | |
528 | struct proc * | |
529 | make_proc (struct inf *inf, mach_port_t port, int tid) | |
530 | { | |
531 | error_t err; | |
532 | mach_port_t prev_port = MACH_PORT_NULL; | |
533 | struct proc *proc = malloc (sizeof (struct proc)); | |
534 | ||
535 | proc->port = port; | |
536 | proc->tid = tid; | |
537 | proc->inf = inf; | |
538 | proc->next = 0; | |
539 | proc->saved_exc_port = MACH_PORT_NULL; | |
540 | proc->exc_port = MACH_PORT_NULL; | |
541 | ||
542 | proc->sc = 0; | |
543 | proc->cur_sc = 0; | |
544 | ||
545 | /* Note that these are all the values for threads; the task simply uses the | |
546 | corresponding field in INF directly. */ | |
547 | proc->run_sc = inf->default_thread_run_sc; | |
548 | proc->pause_sc = inf->default_thread_pause_sc; | |
549 | proc->detach_sc = inf->default_thread_detach_sc; | |
550 | proc->resume_sc = proc->run_sc; | |
551 | ||
552 | proc->aborted = 0; | |
553 | proc->dead = 0; | |
554 | proc->state_valid = 0; | |
555 | proc->state_changed = 0; | |
556 | ||
557 | proc_debug (proc, "is new"); | |
558 | ||
559 | /* Get notified when things die. */ | |
560 | err = | |
c5aa993b | 561 | mach_port_request_notification (mach_task_self (), port, |
c906108c SS |
562 | MACH_NOTIFY_DEAD_NAME, 1, |
563 | inf->event_port, | |
564 | MACH_MSG_TYPE_MAKE_SEND_ONCE, | |
565 | &prev_port); | |
566 | if (err) | |
567 | warning ("Couldn't request notification for port %d: %s", | |
568 | port, strerror (err)); | |
569 | else | |
570 | { | |
571 | proc_debug (proc, "notifications to: %d", inf->event_port); | |
572 | if (prev_port != MACH_PORT_NULL) | |
573 | mach_port_deallocate (mach_task_self (), prev_port); | |
574 | } | |
575 | ||
576 | if (inf->want_exceptions) | |
577 | if (proc_is_task (proc)) | |
578 | /* Make the task exception port point to us. */ | |
579 | proc_steal_exc_port (proc, inf->event_port); | |
580 | else | |
581 | /* Just clear thread exception ports -- they default to the task one. */ | |
582 | proc_steal_exc_port (proc, MACH_PORT_NULL); | |
583 | ||
584 | return proc; | |
585 | } | |
586 | ||
587 | /* Frees PROC and any resources it uses, and returns the value of PROC's | |
588 | next field. */ | |
589 | struct proc * | |
590 | _proc_free (struct proc *proc) | |
591 | { | |
592 | struct inf *inf = proc->inf; | |
593 | struct proc *next = proc->next; | |
594 | ||
595 | proc_debug (proc, "freeing..."); | |
596 | ||
597 | if (proc == inf->step_thread) | |
598 | /* Turn off single stepping. */ | |
599 | inf_set_step_thread (inf, 0); | |
600 | if (proc == inf->wait.thread) | |
601 | inf_clear_wait (inf); | |
602 | if (proc == inf->signal_thread) | |
603 | inf->signal_thread = 0; | |
604 | ||
605 | if (proc->port != MACH_PORT_NULL) | |
606 | { | |
607 | if (proc->exc_port != MACH_PORT_NULL) | |
608 | /* Restore the original exception port. */ | |
609 | proc_restore_exc_port (proc); | |
610 | if (proc->cur_sc != 0) | |
611 | /* Resume the thread/task. */ | |
612 | { | |
613 | proc->sc = 0; | |
614 | proc_update_sc (proc); | |
615 | } | |
616 | mach_port_deallocate (mach_task_self (), proc->port); | |
617 | } | |
618 | ||
619 | free (proc); | |
620 | return next; | |
621 | } | |
622 | \f | |
c5aa993b JM |
623 | struct inf * |
624 | make_inf () | |
c906108c SS |
625 | { |
626 | struct inf *inf = malloc (sizeof (struct inf)); | |
627 | ||
628 | if (!inf) | |
629 | return 0; | |
630 | ||
631 | inf->task = 0; | |
632 | inf->threads = 0; | |
633 | inf->threads_up_to_date = 0; | |
634 | inf->pid = 0; | |
635 | inf->wait.status.kind = TARGET_WAITKIND_SPURIOUS; | |
636 | inf->wait.thread = 0; | |
637 | inf->wait.exc.handler = MACH_PORT_NULL; | |
638 | inf->wait.exc.reply = MACH_PORT_NULL; | |
639 | inf->step_thread = 0; | |
640 | inf->signal_thread = 0; | |
641 | inf->event_port = MACH_PORT_NULL; | |
c906108c | 642 | inf->running = 0; |
cce74817 JM |
643 | inf->stopped = 0; |
644 | inf->nomsg = 1; | |
c906108c SS |
645 | inf->traced = 0; |
646 | inf->no_wait = 0; | |
647 | inf->pending_execs = 0; | |
648 | inf->pause_sc = 1; | |
649 | inf->detach_sc = 0; | |
650 | inf->default_thread_run_sc = 0; | |
651 | inf->default_thread_pause_sc = 0; | |
652 | inf->default_thread_detach_sc = 0; | |
653 | inf->want_signals = 1; /* By default */ | |
654 | inf->want_exceptions = 1; /* By default */ | |
655 | ||
656 | return inf; | |
657 | } | |
658 | ||
659 | /* clear INF's target wait status. */ | |
660 | void | |
661 | inf_clear_wait (struct inf *inf) | |
662 | { | |
663 | inf_debug (inf, "clearing wait"); | |
664 | inf->wait.status.kind = TARGET_WAITKIND_SPURIOUS; | |
665 | inf->wait.thread = 0; | |
666 | inf->wait.suppress = 0; | |
667 | if (inf->wait.exc.handler != MACH_PORT_NULL) | |
668 | { | |
669 | mach_port_deallocate (mach_task_self (), inf->wait.exc.handler); | |
670 | inf->wait.exc.handler = MACH_PORT_NULL; | |
671 | } | |
672 | if (inf->wait.exc.reply != MACH_PORT_NULL) | |
673 | { | |
674 | mach_port_deallocate (mach_task_self (), inf->wait.exc.reply); | |
675 | inf->wait.exc.reply = MACH_PORT_NULL; | |
676 | } | |
677 | } | |
678 | \f | |
679 | void | |
680 | inf_cleanup (struct inf *inf) | |
681 | { | |
682 | inf_debug (inf, "cleanup"); | |
683 | ||
684 | inf_clear_wait (inf); | |
685 | ||
686 | inf_set_pid (inf, -1); | |
687 | inf->pid = 0; | |
cce74817 JM |
688 | inf->running = 0; |
689 | inf->stopped = 0; | |
690 | inf->nomsg = 1; | |
c906108c SS |
691 | inf->traced = 0; |
692 | inf->no_wait = 0; | |
c906108c SS |
693 | inf->pending_execs = 0; |
694 | ||
695 | if (inf->event_port) | |
696 | { | |
697 | mach_port_destroy (mach_task_self (), inf->event_port); | |
698 | inf->event_port = MACH_PORT_NULL; | |
699 | } | |
700 | } | |
701 | ||
702 | void | |
703 | inf_startup (struct inf *inf, int pid) | |
704 | { | |
705 | error_t err; | |
706 | ||
707 | inf_debug (inf, "startup: pid = %d", pid); | |
708 | ||
709 | inf_cleanup (inf); | |
710 | ||
711 | /* Make the port on which we receive all events. */ | |
712 | err = mach_port_allocate (mach_task_self (), | |
713 | MACH_PORT_RIGHT_RECEIVE, &inf->event_port); | |
714 | if (err) | |
715 | error ("Error allocating event port: %s", strerror (err)); | |
716 | ||
717 | /* Make a send right for it, so we can easily copy it for other people. */ | |
718 | mach_port_insert_right (mach_task_self (), inf->event_port, | |
719 | inf->event_port, MACH_MSG_TYPE_MAKE_SEND); | |
720 | inf_set_pid (inf, pid); | |
721 | } | |
722 | \f | |
723 | /* close current process, if any, and attach INF to process PORT */ | |
c5aa993b | 724 | void |
c906108c SS |
725 | inf_set_pid (struct inf *inf, pid_t pid) |
726 | { | |
727 | task_t task_port; | |
728 | struct proc *task = inf->task; | |
729 | ||
730 | inf_debug (inf, "setting pid: %d", pid); | |
731 | ||
732 | if (pid < 0) | |
733 | task_port = MACH_PORT_NULL; | |
734 | else | |
735 | { | |
736 | error_t err = proc_pid2task (proc_server, pid, &task_port); | |
737 | if (err) | |
738 | error ("Error getting task for pid %d: %s", pid, strerror (err)); | |
739 | } | |
740 | ||
741 | inf_debug (inf, "setting task: %d", task_port); | |
742 | ||
743 | if (inf->pause_sc) | |
744 | task_suspend (task_port); | |
745 | ||
746 | if (task && task->port != task_port) | |
747 | { | |
748 | inf->task = 0; | |
749 | inf_validate_procs (inf); /* Trash all the threads. */ | |
750 | _proc_free (task); /* And the task. */ | |
751 | } | |
752 | ||
753 | if (task_port != MACH_PORT_NULL) | |
754 | { | |
755 | inf->task = make_proc (inf, task_port, PROC_TID_TASK); | |
756 | inf->threads_up_to_date = 0; | |
757 | } | |
758 | ||
759 | if (inf->task) | |
760 | { | |
761 | inf->pid = pid; | |
762 | if (inf->pause_sc) | |
c5aa993b | 763 | inf->task->sc = inf->task->cur_sc = 1; /* Reflect task_suspend above */ |
c906108c SS |
764 | } |
765 | else | |
766 | inf->pid = -1; | |
767 | } | |
768 | \f | |
cce74817 JM |
769 | /* Validates INF's stopped, nomsg and traced field from the actual |
770 | proc server state. Note that the traced field is only updated from | |
771 | the proc server state if we do not have a message port. If we do | |
772 | have a message port we'd better look at the tracemask itself. */ | |
c906108c | 773 | static void |
cce74817 | 774 | inf_validate_procinfo (struct inf *inf) |
c906108c SS |
775 | { |
776 | char *noise; | |
777 | mach_msg_type_number_t noise_len = 0; | |
778 | struct procinfo *pi; | |
779 | mach_msg_type_number_t pi_len = 0; | |
780 | int info_flags = 0; | |
781 | error_t err = | |
c5aa993b JM |
782 | proc_getprocinfo (proc_server, inf->pid, &info_flags, |
783 | (procinfo_t *) & pi, &pi_len, &noise, &noise_len); | |
c906108c | 784 | |
c5aa993b | 785 | if (!err) |
c906108c SS |
786 | { |
787 | inf->stopped = !!(pi->state & PI_STOPPED); | |
cce74817 JM |
788 | inf->nomsg = !!(pi->state & PI_NOMSG); |
789 | if (inf->nomsg) | |
790 | inf->traced = !!(pi->state & PI_TRACED); | |
c5aa993b | 791 | vm_deallocate (mach_task_self (), (vm_address_t) pi, pi_len); |
c906108c | 792 | if (noise_len > 0) |
c5aa993b | 793 | vm_deallocate (mach_task_self (), (vm_address_t) noise, noise_len); |
c906108c SS |
794 | } |
795 | } | |
796 | ||
797 | /* Validates INF's task suspend count. If it's higher than we expect, verify | |
798 | with the user before `stealing' the extra count. */ | |
799 | static void | |
800 | inf_validate_task_sc (struct inf *inf) | |
801 | { | |
802 | struct task_basic_info info; | |
803 | mach_msg_type_number_t info_len = TASK_BASIC_INFO_COUNT; | |
804 | error_t err = | |
c5aa993b | 805 | task_info (inf->task->port, TASK_BASIC_INFO, (task_info_t) & info, &info_len); |
c906108c SS |
806 | |
807 | if (err) | |
808 | inf->task->dead = 1; /* oh well */ | |
809 | else if (inf->task->cur_sc < info.suspend_count) | |
810 | { | |
811 | int abort; | |
812 | ||
813 | target_terminal_ours (); /* Allow I/O. */ | |
814 | abort = | |
815 | !query ("Pid %d has an additional task suspend count of %d; clear it? ", | |
816 | inf->pid, info.suspend_count - inf->task->cur_sc); | |
c5aa993b | 817 | target_terminal_inferior (); /* Give it back to the child. */ |
c906108c SS |
818 | |
819 | if (abort) | |
820 | error ("Additional task suspend count left untouched."); | |
821 | ||
822 | inf->task->cur_sc = info.suspend_count; | |
823 | } | |
824 | } | |
825 | ||
826 | /* Turns tracing for INF on or off, depending on ON, unless it already is. | |
827 | If INF is running, the resume_sc count of INF's threads will be modified, | |
828 | and the signal thread will briefly be run to change the trace state. */ | |
829 | void | |
830 | inf_set_traced (struct inf *inf, int on) | |
831 | { | |
832 | if (on != inf->traced) | |
833 | if (inf->task && !inf->task->dead) | |
834 | /* Make it take effect immediately. */ | |
835 | { | |
c5aa993b | 836 | sigset_t mask = on ? ~(sigset_t) 0 : 0; |
c906108c | 837 | error_t err = |
c5aa993b JM |
838 | INF_RESUME_MSGPORT_RPC (inf, msg_set_init_int (msgport, refport, |
839 | INIT_TRACEMASK, mask)); | |
c906108c SS |
840 | if (err == EIEIO) |
841 | { | |
842 | if (on) | |
843 | warning ("Can't modify tracing state for pid %d: No signal thread", | |
844 | inf->pid); | |
845 | inf->traced = on; | |
846 | } | |
847 | else if (err) | |
848 | warning ("Can't modify tracing state for pid %d: %s", | |
849 | inf->pid, strerror (err)); | |
850 | else | |
851 | inf->traced = on; | |
852 | } | |
853 | else | |
854 | inf->traced = on; | |
855 | } | |
856 | \f | |
857 | /* Makes all the real suspend count deltas of all the procs in INF match the | |
858 | desired values. Careful to always do thread/task suspend counts in the | |
c5aa993b | 859 | safe order. Returns true if at least one thread is thought to be running. */ |
c906108c SS |
860 | int |
861 | inf_update_suspends (struct inf *inf) | |
862 | { | |
863 | struct proc *task = inf->task; | |
864 | /* We don't have to update INF->threads even though we're iterating over it | |
865 | because we'll change a thread only if it already has an existing proc | |
866 | entry. */ | |
867 | ||
868 | inf_debug (inf, "updating suspend counts"); | |
869 | ||
870 | if (task) | |
871 | { | |
872 | struct proc *thread; | |
873 | int task_running = (task->sc == 0), thread_running = 0; | |
874 | ||
875 | if (task->sc > task->cur_sc) | |
876 | /* The task is becoming _more_ suspended; do before any threads. */ | |
877 | task_running = proc_update_sc (task); | |
878 | ||
879 | if (inf->pending_execs) | |
880 | /* When we're waiting for an exec, things may be happening behind our | |
881 | back, so be conservative. */ | |
882 | thread_running = 1; | |
883 | ||
884 | /* Do all the thread suspend counts. */ | |
885 | for (thread = inf->threads; thread; thread = thread->next) | |
886 | thread_running |= proc_update_sc (thread); | |
887 | ||
888 | if (task->sc != task->cur_sc) | |
889 | /* We didn't do the task first, because we wanted to wait for the | |
890 | threads; do it now. */ | |
891 | task_running = proc_update_sc (task); | |
892 | ||
893 | inf_debug (inf, "%srunning...", | |
894 | (thread_running && task_running) ? "" : "not "); | |
895 | ||
896 | inf->running = thread_running && task_running; | |
897 | ||
898 | /* Once any thread has executed some code, we can't depend on the | |
c5aa993b | 899 | threads list any more. */ |
c906108c SS |
900 | if (inf->running) |
901 | inf->threads_up_to_date = 0; | |
902 | ||
903 | return inf->running; | |
904 | } | |
905 | ||
906 | return 0; | |
907 | } | |
908 | \f | |
909 | /* Converts a GDB pid to a struct proc. */ | |
910 | struct proc * | |
911 | inf_tid_to_thread (struct inf *inf, int tid) | |
912 | { | |
913 | struct proc *thread = inf->threads; | |
914 | ||
915 | while (thread) | |
916 | if (thread->tid == tid) | |
917 | return thread; | |
918 | else | |
919 | thread = thread->next; | |
920 | return 0; | |
921 | } | |
922 | ||
923 | /* Converts a thread port to a struct proc. */ | |
924 | struct proc * | |
925 | inf_port_to_thread (struct inf *inf, mach_port_t port) | |
926 | { | |
927 | struct proc *thread = inf->threads; | |
928 | while (thread) | |
929 | if (thread->port == port) | |
930 | return thread; | |
931 | else | |
932 | thread = thread->next; | |
933 | return 0; | |
934 | } | |
935 | \f | |
936 | /* Make INF's list of threads be consistent with reality of TASK. */ | |
937 | void | |
938 | inf_validate_procs (struct inf *inf) | |
939 | { | |
940 | int i; | |
941 | thread_array_t threads; | |
942 | unsigned num_threads; | |
943 | struct proc *task = inf->task; | |
944 | ||
945 | /* If no threads are currently running, this function will guarantee that | |
946 | things are up to date. The exception is if there are zero threads -- | |
947 | then it is almost certainly in an odd state, and probably some outside | |
948 | agent will create threads. */ | |
949 | inf->threads_up_to_date = inf->threads ? !inf->running : 0; | |
950 | ||
951 | if (task) | |
952 | { | |
953 | error_t err = task_threads (task->port, &threads, &num_threads); | |
954 | inf_debug (inf, "fetching threads"); | |
955 | if (err) | |
956 | /* TASK must be dead. */ | |
957 | { | |
958 | task->dead = 1; | |
959 | task = 0; | |
960 | } | |
961 | } | |
962 | ||
963 | if (!task) | |
964 | { | |
965 | num_threads = 0; | |
966 | inf_debug (inf, "no task"); | |
967 | } | |
968 | ||
969 | { | |
970 | unsigned search_start = 0; /* Make things normally linear. */ | |
971 | /* Which thread in PROCS corresponds to each task thread, & the task. */ | |
972 | struct proc *matched[num_threads + 1]; | |
973 | /* The last thread in INF->threads, so we can add to the end. */ | |
974 | struct proc *last = 0; | |
975 | /* The current thread we're considering. */ | |
976 | struct proc *thread = inf->threads; | |
977 | ||
978 | bzero (matched, sizeof (matched)); | |
979 | ||
980 | while (thread) | |
981 | { | |
982 | unsigned left; | |
983 | ||
984 | for (i = search_start, left = num_threads; left; i++, left--) | |
985 | { | |
986 | if (i >= num_threads) | |
c5aa993b | 987 | i -= num_threads; /* I wrapped around. */ |
c906108c SS |
988 | if (thread->port == threads[i]) |
989 | /* We already know about this thread. */ | |
990 | { | |
991 | matched[i] = thread; | |
992 | last = thread; | |
993 | thread = thread->next; | |
994 | search_start++; | |
995 | break; | |
996 | } | |
997 | } | |
998 | ||
c5aa993b | 999 | if (!left) |
c906108c SS |
1000 | { |
1001 | proc_debug (thread, "died!"); | |
1002 | thread->port = MACH_PORT_NULL; | |
c5aa993b | 1003 | thread = _proc_free (thread); /* THREAD is dead. */ |
c906108c SS |
1004 | (last ? last->next : inf->threads) = thread; |
1005 | } | |
1006 | } | |
1007 | ||
1008 | for (i = 0; i < num_threads; i++) | |
1009 | if (matched[i]) | |
1010 | /* Throw away the duplicate send right. */ | |
1011 | mach_port_deallocate (mach_task_self (), threads[i]); | |
1012 | else | |
1013 | /* THREADS[I] is a thread we don't know about yet! */ | |
1014 | { | |
1015 | thread = make_proc (inf, threads[i], next_thread_id++); | |
1016 | (last ? last->next : inf->threads) = thread; | |
1017 | last = thread; | |
1018 | proc_debug (thread, "new thread: %d", threads[i]); | |
c5aa993b | 1019 | add_thread (thread->tid); /* Tell GDB's generic thread code. */ |
c906108c SS |
1020 | } |
1021 | ||
c5aa993b JM |
1022 | vm_deallocate (mach_task_self (), |
1023 | (vm_address_t) threads, (num_threads * sizeof (thread_t))); | |
c906108c SS |
1024 | } |
1025 | } | |
1026 | \f | |
1027 | /* Makes sure that INF's thread list is synced with the actual process. */ | |
1028 | inline int | |
1029 | inf_update_procs (struct inf *inf) | |
1030 | { | |
c5aa993b | 1031 | if (!inf->task) |
c906108c | 1032 | return 0; |
c5aa993b | 1033 | if (!inf->threads_up_to_date) |
c906108c SS |
1034 | inf_validate_procs (inf); |
1035 | return !!inf->task; | |
1036 | } | |
1037 | ||
1038 | /* Sets the resume_sc of each thread in inf. That of RUN_THREAD is set to 0, | |
1039 | and others are set to their run_sc if RUN_OTHERS is true, and otherwise | |
1040 | their pause_sc. */ | |
c5aa993b | 1041 | inline void |
c906108c SS |
1042 | inf_set_threads_resume_sc (struct inf *inf, |
1043 | struct proc *run_thread, int run_others) | |
1044 | { | |
1045 | struct proc *thread; | |
1046 | inf_update_procs (inf); | |
1047 | for (thread = inf->threads; thread; thread = thread->next) | |
1048 | if (thread == run_thread) | |
1049 | thread->resume_sc = 0; | |
1050 | else if (run_others) | |
1051 | thread->resume_sc = thread->run_sc; | |
1052 | else | |
1053 | thread->resume_sc = thread->pause_sc; | |
1054 | } | |
1055 | \f | |
1056 | /* Cause INF to continue execution immediately; individual threads may still | |
1057 | be suspended (but their suspend counts will be updated). */ | |
1058 | inline void | |
1059 | inf_resume (struct inf *inf) | |
1060 | { | |
1061 | struct proc *thread; | |
1062 | ||
1063 | inf_update_procs (inf); | |
1064 | ||
1065 | for (thread = inf->threads; thread; thread = thread->next) | |
1066 | thread->sc = thread->resume_sc; | |
1067 | ||
1068 | if (inf->task) | |
1069 | { | |
c5aa993b | 1070 | if (!inf->pending_execs) |
c906108c SS |
1071 | /* Try to make sure our task count is correct -- in the case where |
1072 | we're waiting for an exec though, things are too volatile, so just | |
1073 | assume things will be reasonable (which they usually will be). */ | |
1074 | inf_validate_task_sc (inf); | |
1075 | inf->task->sc = 0; | |
1076 | } | |
1077 | ||
1078 | inf_update_suspends (inf); | |
1079 | } | |
1080 | ||
1081 | /* Cause INF to stop execution immediately; individual threads may still | |
1082 | be running. */ | |
1083 | inline void | |
1084 | inf_suspend (struct inf *inf) | |
1085 | { | |
1086 | struct proc *thread; | |
1087 | ||
1088 | inf_update_procs (inf); | |
1089 | ||
1090 | for (thread = inf->threads; thread; thread = thread->next) | |
1091 | thread->sc = thread->pause_sc; | |
1092 | ||
1093 | if (inf->task) | |
1094 | inf->task->sc = inf->pause_sc; | |
1095 | ||
1096 | inf_update_suspends (inf); | |
1097 | } | |
1098 | \f | |
1099 | /* INF has one thread PROC that is in single-stepping mode. This function | |
1100 | changes it to be PROC, changing any old step_thread to be a normal one. A | |
1101 | PROC of 0 clears any existing value. */ | |
1102 | void | |
1103 | inf_set_step_thread (struct inf *inf, struct proc *thread) | |
1104 | { | |
1105 | assert (!thread || proc_is_thread (thread)); | |
1106 | ||
1107 | if (thread) | |
1108 | inf_debug (inf, "setting step thread: %d/%d", inf->pid, thread->tid); | |
1109 | else | |
1110 | inf_debug (inf, "clearing step thread"); | |
1111 | ||
1112 | if (inf->step_thread != thread) | |
1113 | { | |
1114 | if (inf->step_thread && inf->step_thread->port != MACH_PORT_NULL) | |
c5aa993b | 1115 | if (!proc_trace (inf->step_thread, 0)) |
c906108c SS |
1116 | return; |
1117 | if (thread && proc_trace (thread, 1)) | |
1118 | inf->step_thread = thread; | |
1119 | else | |
1120 | inf->step_thread = 0; | |
1121 | } | |
1122 | } | |
1123 | \f | |
1124 | /* Set up the thread resume_sc's so that only the signal thread is running | |
1125 | (plus whatever other thread are set to always run). Returns true if we | |
1126 | did so, or false if we can't find a signal thread. */ | |
1127 | inline int | |
1128 | inf_set_threads_resume_sc_for_signal_thread (struct inf *inf) | |
1129 | { | |
1130 | if (inf->signal_thread) | |
1131 | { | |
1132 | inf_set_threads_resume_sc (inf, inf->signal_thread, 0); | |
1133 | return 1; | |
1134 | } | |
1135 | else | |
1136 | return 0; | |
1137 | } | |
1138 | ||
1139 | static void | |
1140 | inf_update_signal_thread (struct inf *inf) | |
1141 | { | |
1142 | /* XXX for now we assume that if there's a msgport, the 2nd thread is | |
1143 | the signal thread. */ | |
1144 | inf->signal_thread = inf->threads ? inf->threads->next : 0; | |
1145 | } | |
1146 | \f | |
1147 | /* Detachs from INF's inferior task, letting it run once again... */ | |
1148 | void | |
1149 | inf_detach (struct inf *inf) | |
1150 | { | |
1151 | struct proc *task = inf->task; | |
1152 | ||
1153 | inf_debug (inf, "detaching..."); | |
1154 | ||
1155 | inf_clear_wait (inf); | |
1156 | inf_set_step_thread (inf, 0); | |
1157 | ||
1158 | if (task) | |
1159 | { | |
1160 | struct proc *thread; | |
1161 | ||
cce74817 JM |
1162 | inf_validate_procinfo (inf); |
1163 | ||
c906108c SS |
1164 | inf_set_traced (inf, 0); |
1165 | if (inf->stopped) | |
cce74817 JM |
1166 | { |
1167 | if (inf->nomsg) | |
1168 | inf_continue (inf); | |
1169 | else | |
1170 | inf_signal (inf, TARGET_SIGNAL_0); | |
1171 | } | |
c906108c SS |
1172 | |
1173 | proc_restore_exc_port (task); | |
1174 | task->sc = inf->detach_sc; | |
1175 | ||
1176 | for (thread = inf->threads; thread; thread = thread->next) | |
1177 | { | |
1178 | proc_restore_exc_port (thread); | |
1179 | thread->sc = thread->detach_sc; | |
1180 | } | |
1181 | ||
1182 | inf_update_suspends (inf); | |
1183 | } | |
1184 | ||
1185 | inf_cleanup (inf); | |
1186 | } | |
1187 | ||
1188 | /* Attaches INF to the process with process id PID, returning it in a suspended | |
1189 | state suitable for debugging. */ | |
1190 | void | |
1191 | inf_attach (struct inf *inf, int pid) | |
1192 | { | |
1193 | inf_debug (inf, "attaching: %d", pid); | |
1194 | ||
1195 | if (inf->pid) | |
1196 | inf_detach (inf); | |
1197 | ||
1198 | inf_startup (inf, pid); | |
1199 | } | |
1200 | \f | |
1201 | /* Makes sure that we've got our exception ports entrenched in the process. */ | |
c5aa993b JM |
1202 | void |
1203 | inf_steal_exc_ports (struct inf *inf) | |
c906108c SS |
1204 | { |
1205 | struct proc *thread; | |
1206 | ||
1207 | inf_debug (inf, "stealing exception ports"); | |
1208 | ||
1209 | inf_set_step_thread (inf, 0); /* The step thread is special. */ | |
1210 | ||
1211 | proc_steal_exc_port (inf->task, inf->event_port); | |
1212 | for (thread = inf->threads; thread; thread = thread->next) | |
1213 | proc_steal_exc_port (thread, MACH_PORT_NULL); | |
1214 | } | |
1215 | ||
1216 | /* Makes sure the process has its own exception ports. */ | |
c5aa993b JM |
1217 | void |
1218 | inf_restore_exc_ports (struct inf *inf) | |
c906108c SS |
1219 | { |
1220 | struct proc *thread; | |
1221 | ||
1222 | inf_debug (inf, "restoring exception ports"); | |
1223 | ||
1224 | inf_set_step_thread (inf, 0); /* The step thread is special. */ | |
1225 | ||
1226 | proc_restore_exc_port (inf->task); | |
1227 | for (thread = inf->threads; thread; thread = thread->next) | |
1228 | proc_restore_exc_port (thread); | |
1229 | } | |
1230 | \f | |
1231 | /* Deliver signal SIG to INF. If INF is stopped, delivering a signal, even | |
1232 | signal 0, will continue it. INF is assumed to be in a paused state, and | |
1233 | the resume_sc's of INF's threads may be affected. */ | |
1234 | void | |
1235 | inf_signal (struct inf *inf, enum target_signal sig) | |
1236 | { | |
1237 | error_t err = 0; | |
1238 | int host_sig = target_signal_to_host (sig); | |
1239 | ||
1240 | #define NAME target_signal_to_name (sig) | |
1241 | ||
1242 | if (host_sig >= _NSIG) | |
1243 | /* A mach exception. Exceptions are encoded in the signal space by | |
1244 | putting them after _NSIG; this assumes they're positive (and not | |
1245 | extremely large)! */ | |
1246 | { | |
1247 | struct inf_wait *w = &inf->wait; | |
1248 | if (w->status.kind == TARGET_WAITKIND_STOPPED | |
1249 | && w->status.value.sig == sig | |
1250 | && w->thread && !w->thread->aborted) | |
1251 | /* We're passing through the last exception we received. This is | |
1252 | kind of bogus, because exceptions are per-thread whereas gdb | |
1253 | treats signals as per-process. We just forward the exception to | |
1254 | the correct handler, even it's not for the same thread as TID -- | |
1255 | i.e., we pretend it's global. */ | |
1256 | { | |
1257 | struct exc_state *e = &w->exc; | |
1258 | inf_debug (inf, "passing through exception:" | |
1259 | " task = %d, thread = %d, exc = %d" | |
1260 | ", code = %d, subcode = %d", | |
1261 | w->thread->port, inf->task->port, | |
1262 | e->exception, e->code, e->subcode); | |
1263 | err = | |
1264 | exception_raise_request (e->handler, | |
1265 | e->reply, MACH_MSG_TYPE_MOVE_SEND_ONCE, | |
1266 | w->thread->port, inf->task->port, | |
1267 | e->exception, e->code, e->subcode); | |
1268 | } | |
1269 | else | |
1270 | error ("Can't forward spontaneous exception (%s).", NAME); | |
1271 | } | |
1272 | else | |
1273 | /* A Unix signal. */ | |
c5aa993b JM |
1274 | if (inf->stopped) |
1275 | /* The process is stopped and expecting a signal. Just send off a | |
1276 | request and let it get handled when we resume everything. */ | |
1277 | { | |
1278 | inf_debug (inf, "sending %s to stopped process", NAME); | |
1279 | err = | |
1280 | INF_MSGPORT_RPC (inf, | |
1281 | msg_sig_post_untraced_request (msgport, | |
1282 | inf->event_port, | |
1283 | MACH_MSG_TYPE_MAKE_SEND_ONCE, | |
1284 | host_sig, 0, | |
1285 | refport)); | |
1286 | if (!err) | |
1287 | /* Posting an untraced signal automatically continues it. | |
1288 | We clear this here rather than when we get the reply | |
1289 | because we'd rather assume it's not stopped when it | |
1290 | actually is, than the reverse. */ | |
1291 | inf->stopped = 0; | |
1292 | } | |
1293 | else | |
1294 | /* It's not expecting it. We have to let just the signal thread | |
1295 | run, and wait for it to get into a reasonable state before we | |
1296 | can continue the rest of the process. When we finally resume the | |
1297 | process the signal we request will be the very first thing that | |
1298 | happens. */ | |
1299 | { | |
1300 | inf_debug (inf, "sending %s to unstopped process (so resuming signal thread)", NAME); | |
1301 | err = | |
1302 | INF_RESUME_MSGPORT_RPC (inf, msg_sig_post_untraced (msgport, | |
1303 | host_sig, 0, refport)); | |
1304 | } | |
c906108c SS |
1305 | |
1306 | if (err == EIEIO) | |
1307 | /* Can't do too much... */ | |
1308 | warning ("Can't deliver signal %s: No signal thread.", NAME); | |
1309 | else if (err) | |
1310 | warning ("Delivering signal %s: %s", NAME, strerror (err)); | |
1311 | ||
1312 | #undef NAME | |
1313 | } | |
1314 | \f | |
cce74817 JM |
1315 | /* Continue INF without delivering a signal. This is meant to be used |
1316 | when INF does not have a message port. */ | |
1317 | void | |
1318 | inf_continue (struct inf *inf) | |
1319 | { | |
1320 | process_t proc; | |
1321 | error_t err = proc_pid2proc (proc_server, inf->pid, &proc); | |
1322 | ||
c5aa993b | 1323 | if (!err) |
cce74817 JM |
1324 | { |
1325 | inf_debug (inf, "continuing process"); | |
1326 | ||
1327 | err = proc_mark_cont (proc); | |
c5aa993b | 1328 | if (!err) |
cce74817 JM |
1329 | { |
1330 | struct proc *thread; | |
1331 | ||
1332 | for (thread = inf->threads; thread; thread = thread->next) | |
1333 | thread_resume (thread->port); | |
c5aa993b | 1334 | |
cce74817 JM |
1335 | inf->stopped = 0; |
1336 | } | |
1337 | } | |
1338 | ||
1339 | if (err) | |
1340 | warning ("Can't continue process: %s", strerror (err)); | |
1341 | } | |
1342 | \f | |
c906108c SS |
1343 | /* The inferior used for all gdb target ops. */ |
1344 | struct inf *current_inferior = 0; | |
1345 | ||
1346 | /* The inferior being waited for by gnu_wait. Since GDB is decidely not | |
1347 | multi-threaded, we don't bother to lock this. */ | |
1348 | struct inf *waiting_inf; | |
1349 | ||
1350 | /* Wait for something to happen in the inferior, returning what in STATUS. */ | |
1351 | static int | |
1352 | gnu_wait (int tid, struct target_waitstatus *status) | |
1353 | { | |
c5aa993b JM |
1354 | struct msg |
1355 | { | |
1356 | mach_msg_header_t hdr; | |
1357 | mach_msg_type_t type; | |
1358 | int data[8000]; | |
1359 | } | |
1360 | msg; | |
c906108c SS |
1361 | error_t err; |
1362 | struct proc *thread; | |
1363 | struct inf *inf = current_inferior; | |
1364 | ||
1365 | assert (inf->task); | |
1366 | ||
1367 | if (!inf->threads && !inf->pending_execs) | |
1368 | /* No threads! Assume that maybe some outside agency is frobbing our | |
1369 | task, and really look for new threads. If we can't find any, just tell | |
1370 | the user to try again later. */ | |
1371 | { | |
1372 | inf_validate_procs (inf); | |
1373 | if (!inf->threads && !inf->task->dead) | |
1374 | error ("There are no threads; try again later."); | |
1375 | } | |
1376 | ||
1377 | waiting_inf = inf; | |
1378 | ||
1379 | inf_debug (inf, "waiting for: %d", tid); | |
1380 | ||
c5aa993b | 1381 | rewait: |
c906108c SS |
1382 | if (proc_wait_pid != inf->pid && !inf->no_wait) |
1383 | /* Always get information on events from the proc server. */ | |
1384 | { | |
1385 | inf_debug (inf, "requesting wait on pid %d", inf->pid); | |
1386 | ||
1387 | if (proc_wait_pid) | |
1388 | /* The proc server is single-threaded, and only allows a single | |
1389 | outstanding wait request, so we have to cancel the previous one. */ | |
1390 | { | |
1391 | inf_debug (inf, "cancelling previous wait on pid %d", proc_wait_pid); | |
1392 | interrupt_operation (proc_server, 0); | |
1393 | } | |
1394 | ||
1395 | err = | |
1396 | proc_wait_request (proc_server, inf->event_port, inf->pid, WUNTRACED); | |
1397 | if (err) | |
1398 | warning ("wait request failed: %s", strerror (err)); | |
1399 | else | |
1400 | { | |
1401 | inf_debug (inf, "waits pending: %d", proc_waits_pending); | |
1402 | proc_wait_pid = inf->pid; | |
1403 | /* Even if proc_waits_pending was > 0 before, we still won't get | |
1404 | any other replies, because it was either from a different INF, | |
1405 | or a different process attached to INF -- and the event port, | |
c5aa993b | 1406 | which is the wait reply port, changes when you switch processes. */ |
c906108c SS |
1407 | proc_waits_pending = 1; |
1408 | } | |
1409 | } | |
1410 | ||
1411 | inf_clear_wait (inf); | |
1412 | ||
1413 | /* What can happen? (1) Dead name notification; (2) Exceptions arrive; | |
1414 | (3) wait reply from the proc server. */ | |
1415 | ||
1416 | inf_debug (inf, "waiting for an event..."); | |
1417 | err = mach_msg (&msg.hdr, MACH_RCV_MSG | MACH_RCV_INTERRUPT, | |
1418 | 0, sizeof (struct msg), inf->event_port, | |
1419 | MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL); | |
1420 | ||
1421 | /* Re-suspend the task. */ | |
1422 | inf_suspend (inf); | |
1423 | ||
1424 | if (!inf->task && inf->pending_execs) | |
1425 | /* When doing an exec, it's possible that the old task wasn't reused | |
1426 | (e.g., setuid execs). So if the task seems to have disappeared, | |
1427 | attempt to refetch it, as the pid should still be the same. */ | |
1428 | inf_set_pid (inf, inf->pid); | |
1429 | ||
1430 | if (err == EMACH_RCV_INTERRUPTED) | |
1431 | inf_debug (inf, "interrupted"); | |
1432 | else if (err) | |
1433 | error ("Couldn't wait for an event: %s", strerror (err)); | |
1434 | else | |
1435 | { | |
c5aa993b JM |
1436 | struct |
1437 | { | |
1438 | mach_msg_header_t hdr; | |
1439 | mach_msg_type_t err_type; | |
1440 | kern_return_t err; | |
1441 | char noise[200]; | |
1442 | } | |
1443 | reply; | |
c906108c SS |
1444 | |
1445 | inf_debug (inf, "event: msgid = %d", msg.hdr.msgh_id); | |
1446 | ||
1447 | /* Handle what we got. */ | |
c5aa993b JM |
1448 | if (!notify_server (&msg.hdr, &reply.hdr) |
1449 | && !exc_server (&msg.hdr, &reply.hdr) | |
1450 | && !process_reply_server (&msg.hdr, &reply.hdr) | |
1451 | && !msg_reply_server (&msg.hdr, &reply.hdr)) | |
c906108c SS |
1452 | /* Whatever it is, it's something strange. */ |
1453 | error ("Got a strange event, msg id = %d.", msg.hdr.msgh_id); | |
1454 | ||
1455 | if (reply.err) | |
1456 | error ("Handling event, msgid = %d: %s", | |
1457 | msg.hdr.msgh_id, strerror (reply.err)); | |
1458 | } | |
1459 | ||
1460 | if (inf->pending_execs) | |
1461 | /* We're waiting for the inferior to finish execing. */ | |
1462 | { | |
1463 | struct inf_wait *w = &inf->wait; | |
1464 | enum target_waitkind kind = w->status.kind; | |
1465 | ||
1466 | if (kind == TARGET_WAITKIND_SPURIOUS) | |
1467 | /* Since gdb is actually counting the number of times the inferior | |
1468 | stops, expecting one stop per exec, we only return major events | |
1469 | while execing. */ | |
1470 | { | |
1471 | w->suppress = 1; | |
1472 | inf_debug (inf, "pending_execs = %d, ignoring minor event", | |
1473 | inf->pending_execs); | |
1474 | } | |
1475 | else if (kind == TARGET_WAITKIND_STOPPED | |
1476 | && w->status.value.sig == TARGET_SIGNAL_TRAP) | |
1477 | /* Ah hah! A SIGTRAP from the inferior while starting up probably | |
1478 | means we've succesfully completed an exec! */ | |
1479 | { | |
1480 | if (--inf->pending_execs == 0) | |
1481 | /* We're done! */ | |
1482 | { | |
c5aa993b | 1483 | #if 0 /* do we need this? */ |
c906108c | 1484 | prune_threads (1); /* Get rid of the old shell threads */ |
c5aa993b | 1485 | renumber_threads (0); /* Give our threads reasonable names. */ |
c906108c SS |
1486 | #endif |
1487 | } | |
1488 | inf_debug (inf, "pending exec completed, pending_execs => %d", | |
1489 | inf->pending_execs); | |
1490 | } | |
1491 | else if (kind == TARGET_WAITKIND_STOPPED) | |
1492 | /* It's possible that this signal is because of a crashed process | |
1493 | being handled by the hurd crash server; in this case, the process | |
1494 | will have an extra task suspend, which we need to know about. | |
1495 | Since the code in inf_resume that normally checks for this is | |
1496 | disabled while INF->pending_execs, we do the check here instead. */ | |
1497 | inf_validate_task_sc (inf); | |
1498 | } | |
1499 | ||
1500 | if (inf->wait.suppress) | |
1501 | /* Some totally spurious event happened that we don't consider | |
1502 | worth returning to gdb. Just keep waiting. */ | |
1503 | { | |
1504 | inf_debug (inf, "suppressing return, rewaiting..."); | |
1505 | inf_resume (inf); | |
1506 | goto rewait; | |
1507 | } | |
1508 | ||
1509 | /* Pass back out our results. */ | |
1510 | bcopy (&inf->wait.status, status, sizeof (*status)); | |
1511 | ||
1512 | thread = inf->wait.thread; | |
1513 | if (thread) | |
1514 | tid = thread->tid; | |
1515 | else | |
1516 | thread = inf_tid_to_thread (inf, tid); | |
1517 | ||
1518 | if (!thread || thread->port == MACH_PORT_NULL) | |
1519 | /* TID is dead; try and find a new thread. */ | |
1520 | if (inf_update_procs (inf) && inf->threads) | |
1521 | tid = inf->threads->tid; /* The first available thread. */ | |
1522 | else | |
c5aa993b | 1523 | tid = inferior_pid; /* let wait_for_inferior handle exit case */ |
c906108c SS |
1524 | |
1525 | if (thread && tid >= 0 && status->kind != TARGET_WAITKIND_SPURIOUS | |
1526 | && inf->pause_sc == 0 && thread->pause_sc == 0) | |
1527 | /* If something actually happened to THREAD, make sure we suspend it. */ | |
1528 | { | |
1529 | thread->sc = 1; | |
1530 | inf_update_suspends (inf); | |
c5aa993b | 1531 | } |
c906108c SS |
1532 | |
1533 | inf_debug (inf, "returning tid = %d, status = %s (%d)", tid, | |
1534 | status->kind == TARGET_WAITKIND_EXITED ? "EXITED" | |
1535 | : status->kind == TARGET_WAITKIND_STOPPED ? "STOPPED" | |
1536 | : status->kind == TARGET_WAITKIND_SIGNALLED ? "SIGNALLED" | |
1537 | : status->kind == TARGET_WAITKIND_LOADED ? "LOADED" | |
1538 | : status->kind == TARGET_WAITKIND_SPURIOUS ? "SPURIOUS" | |
1539 | : "?", | |
1540 | status->value.integer); | |
1541 | ||
1542 | return tid; | |
1543 | } | |
1544 | \f | |
1545 | /* The rpc handler called by exc_server. */ | |
1546 | error_t | |
1547 | S_exception_raise_request (mach_port_t port, mach_port_t reply_port, | |
1548 | thread_t thread_port, task_t task_port, | |
1549 | int exception, int code, int subcode) | |
1550 | { | |
1551 | struct inf *inf = waiting_inf; | |
1552 | struct proc *thread = inf_port_to_thread (inf, thread_port); | |
1553 | ||
1554 | inf_debug (waiting_inf, | |
1555 | "thread = %d, task = %d, exc = %d, code = %d, subcode = %d", | |
1556 | thread_port, task_port, exception, code); | |
1557 | ||
1558 | if (!thread) | |
1559 | /* We don't know about thread? */ | |
1560 | { | |
1561 | inf_update_procs (inf); | |
1562 | thread = inf_port_to_thread (inf, thread_port); | |
1563 | if (!thread) | |
1564 | /* Give up, the generating thread is gone. */ | |
1565 | return 0; | |
1566 | } | |
1567 | ||
1568 | mach_port_deallocate (mach_task_self (), thread_port); | |
1569 | mach_port_deallocate (mach_task_self (), task_port); | |
1570 | ||
c5aa993b | 1571 | if (!thread->aborted) |
c906108c SS |
1572 | /* THREAD hasn't been aborted since this exception happened (abortion |
1573 | clears any exception state), so it must be real. */ | |
1574 | { | |
1575 | /* Store away the details; this will destroy any previous info. */ | |
1576 | inf->wait.thread = thread; | |
1577 | ||
1578 | inf->wait.status.kind = TARGET_WAITKIND_STOPPED; | |
1579 | ||
1580 | if (exception == EXC_BREAKPOINT) | |
1581 | /* GDB likes to get SIGTRAP for breakpoints. */ | |
1582 | { | |
1583 | inf->wait.status.value.sig = TARGET_SIGNAL_TRAP; | |
1584 | mach_port_deallocate (mach_task_self (), reply_port); | |
1585 | } | |
1586 | else | |
1587 | /* Record the exception so that we can forward it later. */ | |
1588 | { | |
1589 | if (thread->exc_port == port) | |
1590 | { | |
1591 | inf_debug (waiting_inf, "Handler is thread exeption port <%d>", | |
1592 | thread->saved_exc_port); | |
1593 | inf->wait.exc.handler = thread->saved_exc_port; | |
1594 | } | |
1595 | else | |
1596 | { | |
1597 | inf_debug (waiting_inf, "Handler is task exeption port <%d>", | |
1598 | inf->task->saved_exc_port); | |
1599 | inf->wait.exc.handler = inf->task->saved_exc_port; | |
1600 | assert (inf->task->exc_port == port); | |
1601 | } | |
1602 | if (inf->wait.exc.handler != MACH_PORT_NULL) | |
1603 | /* Add a reference to the exception handler. */ | |
1604 | mach_port_mod_refs (mach_task_self (), | |
1605 | inf->wait.exc.handler, MACH_PORT_RIGHT_SEND, | |
1606 | 1); | |
1607 | ||
1608 | inf->wait.exc.exception = exception; | |
1609 | inf->wait.exc.code = code; | |
1610 | inf->wait.exc.subcode = subcode; | |
1611 | inf->wait.exc.reply = reply_port; | |
1612 | ||
1613 | /* Exceptions are encoded in the signal space by putting them after | |
1614 | _NSIG; this assumes they're positive (and not extremely large)! */ | |
1615 | inf->wait.status.value.sig = | |
1616 | target_signal_from_host (_NSIG + exception); | |
1617 | } | |
1618 | } | |
1619 | else | |
1620 | /* A supppressed exception, which ignore. */ | |
1621 | { | |
1622 | inf->wait.suppress = 1; | |
1623 | mach_port_deallocate (mach_task_self (), reply_port); | |
1624 | } | |
1625 | ||
1626 | return 0; | |
1627 | } | |
1628 | \f | |
1629 | /* Fill in INF's wait field after a task has died without giving us more | |
1630 | detailed information. */ | |
1631 | void | |
1632 | inf_task_died_status (struct inf *inf) | |
1633 | { | |
1634 | warning ("Pid %d died with unknown exit status, using SIGKILL.", inf->pid); | |
1635 | inf->wait.status.kind = TARGET_WAITKIND_SIGNALLED; | |
1636 | inf->wait.status.value.sig = TARGET_SIGNAL_KILL; | |
1637 | } | |
1638 | ||
1639 | /* Notify server routines. The only real one is dead name notification. */ | |
1640 | error_t | |
1641 | do_mach_notify_dead_name (mach_port_t notify, mach_port_t dead_port) | |
1642 | { | |
1643 | struct inf *inf = waiting_inf; | |
1644 | ||
1645 | inf_debug (waiting_inf, "port = %d", dead_port); | |
1646 | ||
1647 | if (inf->task && inf->task->port == dead_port) | |
1648 | { | |
1649 | proc_debug (inf->task, "is dead"); | |
1650 | inf->task->port = MACH_PORT_NULL; | |
1651 | if (proc_wait_pid == inf->pid) | |
1652 | /* We have a wait outstanding on the process, which will return more | |
1653 | detailed information, so delay until we get that. */ | |
1654 | inf->wait.suppress = 1; | |
1655 | else | |
1656 | /* We never waited for the process (maybe it wasn't a child), so just | |
1657 | pretend it got a SIGKILL. */ | |
1658 | inf_task_died_status (inf); | |
1659 | } | |
1660 | else | |
1661 | { | |
1662 | struct proc *thread = inf_port_to_thread (inf, dead_port); | |
1663 | if (thread) | |
1664 | { | |
1665 | proc_debug (thread, "is dead"); | |
1666 | thread->port = MACH_PORT_NULL; | |
1667 | } | |
1668 | } | |
1669 | ||
1670 | mach_port_deallocate (mach_task_self (), dead_port); | |
c5aa993b | 1671 | inf->threads_up_to_date = 0; /* Just in case */ |
c906108c SS |
1672 | |
1673 | return 0; | |
1674 | } | |
1675 | \f | |
1676 | static error_t | |
1677 | ill_rpc (char *fun) | |
1678 | { | |
1679 | warning ("illegal rpc: %s", fun); | |
1680 | return 0; | |
1681 | } | |
1682 | ||
1683 | error_t | |
1684 | do_mach_notify_no_senders (mach_port_t notify, mach_port_mscount_t count) | |
1685 | { | |
1686 | return ill_rpc (__FUNCTION__); | |
1687 | } | |
1688 | ||
1689 | error_t | |
1690 | do_mach_notify_port_deleted (mach_port_t notify, mach_port_t name) | |
1691 | { | |
1692 | return ill_rpc (__FUNCTION__); | |
1693 | } | |
1694 | ||
1695 | error_t | |
1696 | do_mach_notify_msg_accepted (mach_port_t notify, mach_port_t name) | |
1697 | { | |
1698 | return ill_rpc (__FUNCTION__); | |
1699 | } | |
1700 | ||
1701 | error_t | |
1702 | do_mach_notify_port_destroyed (mach_port_t notify, mach_port_t name) | |
1703 | { | |
1704 | return ill_rpc (__FUNCTION__); | |
1705 | } | |
1706 | ||
1707 | error_t | |
1708 | do_mach_notify_send_once (mach_port_t notify) | |
1709 | { | |
1710 | return ill_rpc (__FUNCTION__); | |
1711 | } | |
1712 | \f | |
1713 | /* Process_reply server routines. We only use process_wait_reply. */ | |
1714 | ||
1715 | error_t | |
1716 | S_proc_wait_reply (mach_port_t reply, error_t err, | |
1717 | int status, int sigcode, rusage_t rusage, pid_t pid) | |
1718 | { | |
1719 | struct inf *inf = waiting_inf; | |
1720 | ||
1721 | inf_debug (inf, "err = %s, pid = %d, status = 0x%x, sigcode = %d", | |
1722 | err ? strerror (err) : "0", pid, status, sigcode); | |
1723 | ||
1724 | if (err && proc_wait_pid && (!inf->task || !inf->task->port)) | |
1725 | /* Ack. The task has died, but the task-died notification code didn't | |
1726 | tell anyone because it thought a more detailed reply from the | |
1727 | procserver was forthcoming. However, we now learn that won't | |
1728 | happen... So we have to act like the task just died, and this time, | |
1729 | tell the world. */ | |
1730 | inf_task_died_status (inf); | |
1731 | ||
1732 | if (--proc_waits_pending == 0) | |
1733 | /* PROC_WAIT_PID represents the most recent wait. We will always get | |
1734 | replies in order because the proc server is single threaded. */ | |
1735 | proc_wait_pid = 0; | |
1736 | ||
1737 | inf_debug (inf, "waits pending now: %d", proc_waits_pending); | |
1738 | ||
1739 | if (err) | |
1740 | { | |
1741 | if (err != EINTR) | |
1742 | { | |
1743 | warning ("Can't wait for pid %d: %s", inf->pid, strerror (err)); | |
1744 | inf->no_wait = 1; | |
1745 | ||
1746 | /* Since we can't see the inferior's signals, don't trap them. */ | |
1747 | inf_set_traced (inf, 0); | |
1748 | } | |
1749 | } | |
1750 | else if (pid == inf->pid) | |
1751 | { | |
1752 | store_waitstatus (&inf->wait.status, status); | |
1753 | if (inf->wait.status.kind == TARGET_WAITKIND_STOPPED) | |
1754 | /* The process has sent us a signal, and stopped itself in a sane | |
1755 | state pending our actions. */ | |
1756 | { | |
1757 | inf_debug (inf, "process has stopped itself"); | |
1758 | inf->stopped = 1; | |
1759 | } | |
1760 | } | |
1761 | else | |
1762 | inf->wait.suppress = 1; /* Something odd happened. Ignore. */ | |
1763 | ||
1764 | return 0; | |
1765 | } | |
1766 | ||
1767 | error_t | |
1768 | S_proc_setmsgport_reply (mach_port_t reply, error_t err, | |
1769 | mach_port_t old_msg_port) | |
1770 | { | |
1771 | return ill_rpc (__FUNCTION__); | |
1772 | } | |
1773 | ||
1774 | error_t | |
1775 | S_proc_getmsgport_reply (mach_port_t reply, error_t err, mach_port_t msg_port) | |
1776 | { | |
1777 | return ill_rpc (__FUNCTION__); | |
1778 | } | |
1779 | \f | |
1780 | /* Msg_reply server routines. We only use msg_sig_post_untraced_reply. */ | |
1781 | ||
1782 | error_t | |
1783 | S_msg_sig_post_untraced_reply (mach_port_t reply, error_t err) | |
1784 | { | |
1785 | struct inf *inf = waiting_inf; | |
1786 | ||
1787 | if (err == EBUSY) | |
1788 | /* EBUSY is what we get when the crash server has grabbed control of the | |
1789 | process and doesn't like what signal we tried to send it. Just act | |
1790 | like the process stopped (using a signal of 0 should mean that the | |
1791 | *next* time the user continues, it will pass signal 0, which the crash | |
1792 | server should like). */ | |
1793 | { | |
1794 | inf->wait.status.kind = TARGET_WAITKIND_STOPPED; | |
1795 | inf->wait.status.value.sig = TARGET_SIGNAL_0; | |
1796 | } | |
1797 | else if (err) | |
1798 | warning ("Signal delivery failed: %s", strerror (err)); | |
1799 | ||
1800 | if (err) | |
1801 | /* We only get this reply when we've posted a signal to a process which we | |
1802 | thought was stopped, and which we expected to continue after the signal. | |
1803 | Given that the signal has failed for some reason, it's reasonable to | |
1804 | assume it's still stopped. */ | |
1805 | inf->stopped = 1; | |
1806 | else | |
1807 | inf->wait.suppress = 1; | |
1808 | ||
1809 | return 0; | |
1810 | } | |
1811 | ||
1812 | error_t | |
1813 | S_msg_sig_post_reply (mach_port_t reply, error_t err) | |
1814 | { | |
1815 | return ill_rpc (__FUNCTION__); | |
1816 | } | |
1817 | \f | |
1818 | /* Returns the number of messages queued for the receive right PORT. */ | |
1819 | static mach_port_msgcount_t | |
1820 | port_msgs_queued (mach_port_t port) | |
1821 | { | |
1822 | struct mach_port_status status; | |
1823 | error_t err = | |
c5aa993b | 1824 | mach_port_get_receive_status (mach_task_self (), port, &status); |
c906108c SS |
1825 | |
1826 | if (err) | |
1827 | return 0; | |
1828 | else | |
1829 | return status.mps_msgcount; | |
1830 | } | |
1831 | \f | |
1832 | /* Resume execution of the inferior process. | |
1833 | ||
1834 | If STEP is nonzero, single-step it. | |
1835 | If SIGNAL is nonzero, give it that signal. | |
1836 | ||
1837 | TID STEP: | |
1838 | -1 true Single step the current thread allowing other threads to run. | |
1839 | -1 false Continue the current thread allowing other threads to run. | |
1840 | X true Single step the given thread, don't allow any others to run. | |
1841 | X false Continue the given thread, do not allow any others to run. | |
1842 | (Where X, of course, is anything except -1) | |
1843 | ||
1844 | Note that a resume may not `take' if there are pending exceptions/&c | |
1845 | still unprocessed from the last resume we did (any given resume may result | |
1846 | in multiple events returned by wait). | |
c5aa993b | 1847 | */ |
c906108c SS |
1848 | static void |
1849 | gnu_resume (int tid, int step, enum target_signal sig) | |
1850 | { | |
1851 | struct proc *step_thread = 0; | |
1852 | struct inf *inf = current_inferior; | |
1853 | ||
1854 | inf_debug (inf, "tid = %d, step = %d, sig = %d", tid, step, sig); | |
1855 | ||
cce74817 | 1856 | inf_validate_procinfo (inf); |
c5aa993b | 1857 | |
c906108c | 1858 | if (sig != TARGET_SIGNAL_0 || inf->stopped) |
cce74817 JM |
1859 | { |
1860 | if (sig == TARGET_SIGNAL_0 && inf->nomsg) | |
1861 | inf_continue (inf); | |
1862 | else | |
1863 | inf_signal (inf, sig); | |
1864 | } | |
c906108c SS |
1865 | else if (inf->wait.exc.reply != MACH_PORT_NULL) |
1866 | /* We received an exception to which we have chosen not to forward, so | |
1867 | abort the faulting thread, which will perhaps retake it. */ | |
1868 | { | |
1869 | proc_abort (inf->wait.thread, 1); | |
1870 | warning ("Aborting %s with unforwarded exception %s.", | |
1871 | proc_string (inf->wait.thread), | |
1872 | target_signal_to_name (inf->wait.status.value.sig)); | |
1873 | } | |
1874 | ||
1875 | if (port_msgs_queued (inf->event_port)) | |
1876 | /* If there are still messages in our event queue, don't bother resuming | |
1877 | the process, as we're just going to stop it right away anyway. */ | |
1878 | return; | |
1879 | ||
1880 | inf_update_procs (inf); | |
1881 | ||
1882 | if (tid < 0) | |
1883 | /* Allow all threads to run, except perhaps single-stepping one. */ | |
1884 | { | |
1885 | inf_debug (inf, "running all threads; tid = %d", inferior_pid); | |
1886 | tid = inferior_pid; /* What to step. */ | |
1887 | inf_set_threads_resume_sc (inf, 0, 1); | |
1888 | } | |
1889 | else | |
1890 | /* Just allow a single thread to run. */ | |
1891 | { | |
1892 | struct proc *thread = inf_tid_to_thread (inf, tid); | |
c5aa993b | 1893 | if (!thread) |
c906108c SS |
1894 | error ("Can't run single thread id %d: no such thread!"); |
1895 | inf_debug (inf, "running one thread: %d/%d", inf->pid, thread->tid); | |
1896 | inf_set_threads_resume_sc (inf, thread, 0); | |
1897 | } | |
1898 | ||
1899 | if (step) | |
1900 | { | |
1901 | step_thread = inf_tid_to_thread (inf, tid); | |
c5aa993b | 1902 | if (!step_thread) |
c906108c SS |
1903 | warning ("Can't step thread id %d: no such thread.", tid); |
1904 | else | |
1905 | inf_debug (inf, "stepping thread: %d/%d", inf->pid, step_thread->tid); | |
1906 | } | |
1907 | if (step_thread != inf->step_thread) | |
1908 | inf_set_step_thread (inf, step_thread); | |
1909 | ||
1910 | inf_debug (inf, "here we go..."); | |
1911 | inf_resume (inf); | |
1912 | } | |
1913 | \f | |
1914 | static void | |
1915 | gnu_kill_inferior () | |
1916 | { | |
1917 | struct proc *task = current_inferior->task; | |
1918 | if (task) | |
1919 | { | |
1920 | proc_debug (task, "terminating..."); | |
1921 | task_terminate (task->port); | |
1922 | inf_set_pid (current_inferior, -1); | |
1923 | } | |
1924 | target_mourn_inferior (); | |
1925 | } | |
1926 | ||
1927 | /* Clean up after the inferior dies. */ | |
1928 | ||
1929 | static void | |
1930 | gnu_mourn_inferior () | |
1931 | { | |
1932 | inf_debug (current_inferior, "rip"); | |
1933 | inf_detach (current_inferior); | |
1934 | unpush_target (&gnu_ops); | |
1935 | generic_mourn_inferior (); | |
1936 | } | |
1937 | \f | |
1938 | /* Fork an inferior process, and start debugging it. */ | |
1939 | ||
1940 | /* Set INFERIOR_PID to the first thread available in the child, if any. */ | |
1941 | static int | |
1942 | inf_pick_first_thread () | |
1943 | { | |
1944 | if (current_inferior->task && current_inferior->threads) | |
1945 | /* The first thread. */ | |
1946 | return current_inferior->threads->tid; | |
1947 | else | |
1948 | /* What may be the next thread. */ | |
1949 | return next_thread_id; | |
1950 | } | |
1951 | ||
1952 | static struct inf * | |
1953 | cur_inf () | |
1954 | { | |
c5aa993b | 1955 | if (!current_inferior) |
c906108c SS |
1956 | current_inferior = make_inf (); |
1957 | return current_inferior; | |
1958 | } | |
1959 | ||
1960 | static void | |
1961 | gnu_create_inferior (exec_file, allargs, env) | |
1962 | char *exec_file; | |
1963 | char *allargs; | |
1964 | char **env; | |
1965 | { | |
1966 | struct inf *inf = cur_inf (); | |
1967 | ||
1968 | void trace_me () | |
c5aa993b JM |
1969 | { |
1970 | /* We're in the child; make this process stop as soon as it execs. */ | |
1971 | inf_debug (inf, "tracing self"); | |
1972 | if (ptrace (PTRACE_TRACEME) != 0) | |
1973 | error ("ptrace (PTRACE_TRACEME) failed!"); | |
1974 | } | |
7a292a7a | 1975 | void attach_to_child (int pid) |
c5aa993b JM |
1976 | { |
1977 | /* Attach to the now stopped child, which is actually a shell... */ | |
1978 | inf_debug (inf, "attaching to child: %d", pid); | |
c906108c | 1979 | |
c5aa993b | 1980 | inf_attach (inf, pid); |
c906108c | 1981 | |
c5aa993b JM |
1982 | attach_flag = 0; |
1983 | push_target (&gnu_ops); | |
c906108c | 1984 | |
c5aa993b JM |
1985 | inf->pending_execs = 2; |
1986 | inf->nomsg = 1; | |
1987 | inf->traced = 1; | |
c906108c | 1988 | |
c5aa993b JM |
1989 | /* Now let the child run again, knowing that it will stop immediately |
1990 | because of the ptrace. */ | |
1991 | inf_resume (inf); | |
1992 | inferior_pid = inf_pick_first_thread (); | |
c906108c | 1993 | |
c5aa993b JM |
1994 | startup_inferior (inf->pending_execs); |
1995 | } | |
c906108c SS |
1996 | |
1997 | inf_debug (inf, "creating inferior"); | |
1998 | ||
7a292a7a SS |
1999 | fork_inferior (exec_file, allargs, env, trace_me, attach_to_child, |
2000 | NULL, NULL); | |
c906108c | 2001 | |
cce74817 | 2002 | inf_validate_procinfo (inf); |
c906108c SS |
2003 | inf_update_signal_thread (inf); |
2004 | inf_set_traced (inf, inf->want_signals); | |
2005 | ||
2006 | /* Execing the process will have trashed our exception ports; steal them | |
2007 | back (or make sure they're restored if the user wants that). */ | |
2008 | if (inf->want_exceptions) | |
2009 | inf_steal_exc_ports (inf); | |
2010 | else | |
2011 | inf_restore_exc_ports (inf); | |
2012 | ||
2013 | /* Here we go! */ | |
2acceee2 | 2014 | proceed ((CORE_ADDR) -1, 0, 0); |
c906108c SS |
2015 | } |
2016 | ||
2017 | /* Mark our target-struct as eligible for stray "run" and "attach" | |
2018 | commands. */ | |
2019 | static int | |
2020 | gnu_can_run () | |
2021 | { | |
2022 | return 1; | |
2023 | } | |
2024 | \f | |
2025 | #ifdef ATTACH_DETACH | |
2026 | ||
2027 | /* Attach to process PID, then initialize for debugging it | |
2028 | and wait for the trace-trap that results from attaching. */ | |
2029 | static void | |
2030 | gnu_attach (args, from_tty) | |
2031 | char *args; | |
2032 | int from_tty; | |
2033 | { | |
2034 | int pid; | |
2035 | char *exec_file; | |
2036 | struct inf *inf = cur_inf (); | |
2037 | ||
2038 | if (!args) | |
2039 | error_no_arg ("PID to attach"); | |
2040 | ||
2041 | pid = atoi (args); | |
2042 | ||
c5aa993b | 2043 | if (pid == getpid ()) /* Trying to masturbate? */ |
c906108c SS |
2044 | error ("I refuse to debug myself!"); |
2045 | ||
2046 | if (from_tty) | |
2047 | { | |
2048 | exec_file = (char *) get_exec_file (0); | |
2049 | ||
2050 | if (exec_file) | |
2051 | printf_unfiltered ("Attaching to program `%s', pid %d\n", | |
2052 | exec_file, pid); | |
2053 | else | |
2054 | printf_unfiltered ("Attaching to pid %d\n", pid); | |
2055 | ||
2056 | gdb_flush (gdb_stdout); | |
2057 | } | |
2058 | ||
2059 | inf_debug (inf, "attaching to pid: %d", pid); | |
2060 | ||
2061 | inf_attach (inf, pid); | |
2062 | inf_update_procs (inf); | |
2063 | ||
2064 | inferior_pid = inf_pick_first_thread (); | |
2065 | ||
2066 | attach_flag = 1; | |
2067 | push_target (&gnu_ops); | |
2068 | ||
b83266a0 SS |
2069 | /* We have to initialize the terminal settings now, since the code |
2070 | below might try to restore them. */ | |
2071 | target_terminal_init (); | |
c5aa993b | 2072 | |
c906108c SS |
2073 | /* If the process was stopped before we attached, make it continue the next |
2074 | time the user does a continue. */ | |
cce74817 JM |
2075 | inf_validate_procinfo (inf); |
2076 | ||
2077 | inf_update_signal_thread (inf); | |
2078 | inf_set_traced (inf, inf->want_signals); | |
c906108c | 2079 | |
c5aa993b | 2080 | #if 0 /* Do we need this? */ |
c906108c SS |
2081 | renumber_threads (0); /* Give our threads reasonable names. */ |
2082 | #endif | |
2083 | } | |
2084 | \f | |
2085 | /* Take a program previously attached to and detaches it. | |
2086 | The program resumes execution and will no longer stop | |
2087 | on signals, etc. We'd better not have left any breakpoints | |
2088 | in the program or it'll die when it hits one. For this | |
2089 | to work, it may be necessary for the process to have been | |
2090 | previously attached. It *might* work if the program was | |
2091 | started via fork. */ | |
2092 | static void | |
2093 | gnu_detach (args, from_tty) | |
2094 | char *args; | |
2095 | int from_tty; | |
2096 | { | |
2097 | if (from_tty) | |
2098 | { | |
2099 | char *exec_file = get_exec_file (0); | |
2100 | if (exec_file) | |
2101 | printf_unfiltered ("Detaching from program `%s' pid %d\n", | |
2102 | exec_file, current_inferior->pid); | |
2103 | else | |
2104 | printf_unfiltered ("Detaching from pid %d\n", current_inferior->pid); | |
2105 | gdb_flush (gdb_stdout); | |
2106 | } | |
c5aa993b | 2107 | |
c906108c SS |
2108 | inf_detach (current_inferior); |
2109 | ||
2110 | inferior_pid = 0; | |
2111 | ||
c5aa993b | 2112 | unpush_target (&gnu_ops); /* Pop out of handling an inferior */ |
c906108c SS |
2113 | } |
2114 | #endif /* ATTACH_DETACH */ | |
2115 | ||
2116 | static void | |
2117 | gnu_terminal_init_inferior () | |
2118 | { | |
2119 | assert (current_inferior); | |
2120 | terminal_init_inferior_with_pgrp (current_inferior->pid); | |
2121 | } | |
2122 | ||
2123 | /* Get ready to modify the registers array. On machines which store | |
2124 | individual registers, this doesn't need to do anything. On machines | |
2125 | which store all the registers in one fell swoop, this makes sure | |
2126 | that registers contains all the registers from the program being | |
2127 | debugged. */ | |
2128 | ||
2129 | static void | |
2130 | gnu_prepare_to_store () | |
2131 | { | |
2132 | #ifdef CHILD_PREPARE_TO_STORE | |
2133 | CHILD_PREPARE_TO_STORE (); | |
2134 | #endif | |
2135 | } | |
2136 | ||
2137 | static void | |
2138 | gnu_open (arg, from_tty) | |
2139 | char *arg; | |
2140 | int from_tty; | |
2141 | { | |
2142 | error ("Use the \"run\" command to start a Unix child process."); | |
2143 | } | |
2144 | ||
2145 | static void | |
2146 | gnu_stop () | |
2147 | { | |
2148 | error ("to_stop target function not implemented"); | |
2149 | } | |
2150 | ||
7a292a7a | 2151 | static char * |
c906108c SS |
2152 | gnu_pid_to_exec_file () |
2153 | { | |
2154 | error ("to_pid_to_exec_file target function not implemented"); | |
7a292a7a | 2155 | return NULL; |
c906108c | 2156 | } |
c5aa993b | 2157 | |
c906108c SS |
2158 | |
2159 | static int | |
2160 | gnu_thread_alive (int tid) | |
2161 | { | |
2162 | inf_update_procs (current_inferior); | |
2163 | return !!inf_tid_to_thread (current_inferior, tid); | |
2164 | } | |
2165 | \f | |
2166 | /* | |
2167 | * Read inferior task's LEN bytes from ADDR and copy it to MYADDR | |
2168 | * in gdb's address space. | |
2169 | * | |
2170 | * Return 0 on failure; number of bytes read otherwise. | |
2171 | */ | |
2172 | int | |
2173 | gnu_read_inferior (task, addr, myaddr, length) | |
2174 | task_t task; | |
2175 | CORE_ADDR addr; | |
2176 | char *myaddr; | |
2177 | int length; | |
2178 | { | |
2179 | error_t err; | |
2180 | vm_address_t low_address = (vm_address_t) trunc_page (addr); | |
2181 | vm_size_t aligned_length = | |
c5aa993b JM |
2182 | (vm_size_t) round_page (addr + length) - low_address; |
2183 | pointer_t copied; | |
2184 | int copy_count; | |
c906108c SS |
2185 | |
2186 | /* Get memory from inferior with page aligned addresses */ | |
2187 | err = vm_read (task, low_address, aligned_length, &copied, ©_count); | |
2188 | if (err) | |
2189 | return 0; | |
2190 | ||
c5aa993b | 2191 | err = hurd_safe_copyin (myaddr, (void *) addr - low_address + copied, length); |
c906108c SS |
2192 | if (err) |
2193 | { | |
2194 | warning ("Read from inferior faulted: %s", strerror (err)); | |
2195 | length = 0; | |
2196 | } | |
2197 | ||
2198 | err = vm_deallocate (mach_task_self (), copied, copy_count); | |
2199 | if (err) | |
2200 | warning ("gnu_read_inferior vm_deallocate failed: %s", strerror (err)); | |
2201 | ||
2202 | return length; | |
2203 | } | |
2204 | ||
2205 | #define CHK_GOTO_OUT(str,ret) \ | |
2206 | do if (ret != KERN_SUCCESS) { errstr = #str; goto out; } while(0) | |
2207 | ||
c5aa993b JM |
2208 | struct vm_region_list |
2209 | { | |
c906108c | 2210 | struct vm_region_list *next; |
c5aa993b JM |
2211 | vm_prot_t protection; |
2212 | vm_address_t start; | |
2213 | vm_size_t length; | |
c906108c SS |
2214 | }; |
2215 | ||
c5aa993b | 2216 | struct obstack region_obstack; |
c906108c SS |
2217 | |
2218 | /* | |
2219 | * Write gdb's LEN bytes from MYADDR and copy it to ADDR | |
2220 | * in inferior task's address space. | |
2221 | */ | |
2222 | int | |
2223 | gnu_write_inferior (task, addr, myaddr, length) | |
2224 | task_t task; | |
2225 | CORE_ADDR addr; | |
2226 | char *myaddr; | |
2227 | int length; | |
2228 | { | |
2229 | error_t err = 0; | |
c5aa993b JM |
2230 | vm_address_t low_address = (vm_address_t) trunc_page (addr); |
2231 | vm_size_t aligned_length = | |
2232 | (vm_size_t) round_page (addr + length) - low_address; | |
2233 | pointer_t copied; | |
2234 | int copy_count; | |
2235 | int deallocate = 0; | |
c906108c | 2236 | |
c5aa993b | 2237 | char *errstr = "Bug in gnu_write_inferior"; |
c906108c SS |
2238 | |
2239 | struct vm_region_list *region_element; | |
c5aa993b | 2240 | struct vm_region_list *region_head = (struct vm_region_list *) NULL; |
c906108c SS |
2241 | |
2242 | /* Get memory from inferior with page aligned addresses */ | |
2243 | err = vm_read (task, | |
2244 | low_address, | |
2245 | aligned_length, | |
2246 | &copied, | |
2247 | ©_count); | |
2248 | CHK_GOTO_OUT ("gnu_write_inferior vm_read failed", err); | |
2249 | ||
2250 | deallocate++; | |
2251 | ||
c5aa993b | 2252 | err = hurd_safe_copyout ((void *) addr - low_address + copied, myaddr, length); |
c906108c SS |
2253 | CHK_GOTO_OUT ("Write to inferior faulted", err); |
2254 | ||
2255 | obstack_init (®ion_obstack); | |
2256 | ||
2257 | /* Do writes atomically. | |
2258 | * First check for holes and unwritable memory. | |
2259 | */ | |
2260 | { | |
c5aa993b JM |
2261 | vm_size_t remaining_length = aligned_length; |
2262 | vm_address_t region_address = low_address; | |
c906108c SS |
2263 | |
2264 | struct vm_region_list *scan; | |
2265 | ||
c5aa993b | 2266 | while (region_address < low_address + aligned_length) |
c906108c SS |
2267 | { |
2268 | vm_prot_t protection; | |
2269 | vm_prot_t max_protection; | |
2270 | vm_inherit_t inheritance; | |
2271 | boolean_t shared; | |
2272 | mach_port_t object_name; | |
2273 | vm_offset_t offset; | |
c5aa993b JM |
2274 | vm_size_t region_length = remaining_length; |
2275 | vm_address_t old_address = region_address; | |
2276 | ||
c906108c SS |
2277 | err = vm_region (task, |
2278 | ®ion_address, | |
2279 | ®ion_length, | |
2280 | &protection, | |
2281 | &max_protection, | |
2282 | &inheritance, | |
2283 | &shared, | |
2284 | &object_name, | |
2285 | &offset); | |
2286 | CHK_GOTO_OUT ("vm_region failed", err); | |
2287 | ||
2288 | /* Check for holes in memory */ | |
2289 | if (old_address != region_address) | |
2290 | { | |
2291 | warning ("No memory at 0x%x. Nothing written", | |
2292 | old_address); | |
2293 | err = KERN_SUCCESS; | |
2294 | length = 0; | |
2295 | goto out; | |
2296 | } | |
2297 | ||
2298 | if (!(max_protection & VM_PROT_WRITE)) | |
2299 | { | |
2300 | warning ("Memory at address 0x%x is unwritable. Nothing written", | |
2301 | old_address); | |
2302 | err = KERN_SUCCESS; | |
2303 | length = 0; | |
2304 | goto out; | |
2305 | } | |
2306 | ||
2307 | /* Chain the regions for later use */ | |
c5aa993b | 2308 | region_element = |
c906108c | 2309 | (struct vm_region_list *) |
c5aa993b JM |
2310 | obstack_alloc (®ion_obstack, sizeof (struct vm_region_list)); |
2311 | ||
c906108c | 2312 | region_element->protection = protection; |
c5aa993b JM |
2313 | region_element->start = region_address; |
2314 | region_element->length = region_length; | |
c906108c SS |
2315 | |
2316 | /* Chain the regions along with protections */ | |
2317 | region_element->next = region_head; | |
c5aa993b JM |
2318 | region_head = region_element; |
2319 | ||
c906108c SS |
2320 | region_address += region_length; |
2321 | remaining_length = remaining_length - region_length; | |
2322 | } | |
2323 | ||
2324 | /* If things fail after this, we give up. | |
2325 | * Somebody is messing up inferior_task's mappings. | |
2326 | */ | |
c5aa993b | 2327 | |
c906108c SS |
2328 | /* Enable writes to the chained vm regions */ |
2329 | for (scan = region_head; scan; scan = scan->next) | |
2330 | { | |
2331 | boolean_t protection_changed = FALSE; | |
c5aa993b | 2332 | |
c906108c SS |
2333 | if (!(scan->protection & VM_PROT_WRITE)) |
2334 | { | |
2335 | err = vm_protect (task, | |
2336 | scan->start, | |
2337 | scan->length, | |
2338 | FALSE, | |
2339 | scan->protection | VM_PROT_WRITE); | |
2340 | CHK_GOTO_OUT ("vm_protect: enable write failed", err); | |
2341 | } | |
2342 | } | |
2343 | ||
2344 | err = vm_write (task, | |
2345 | low_address, | |
2346 | copied, | |
2347 | aligned_length); | |
2348 | CHK_GOTO_OUT ("vm_write failed", err); | |
c5aa993b | 2349 | |
c906108c SS |
2350 | /* Set up the original region protections, if they were changed */ |
2351 | for (scan = region_head; scan; scan = scan->next) | |
2352 | { | |
2353 | boolean_t protection_changed = FALSE; | |
c5aa993b | 2354 | |
c906108c SS |
2355 | if (!(scan->protection & VM_PROT_WRITE)) |
2356 | { | |
2357 | err = vm_protect (task, | |
2358 | scan->start, | |
2359 | scan->length, | |
2360 | FALSE, | |
2361 | scan->protection); | |
2362 | CHK_GOTO_OUT ("vm_protect: enable write failed", err); | |
2363 | } | |
2364 | } | |
2365 | } | |
2366 | ||
c5aa993b | 2367 | out: |
c906108c SS |
2368 | if (deallocate) |
2369 | { | |
2370 | obstack_free (®ion_obstack, 0); | |
c5aa993b | 2371 | |
c906108c SS |
2372 | (void) vm_deallocate (mach_task_self (), |
2373 | copied, | |
2374 | copy_count); | |
2375 | } | |
2376 | ||
2377 | if (err != KERN_SUCCESS) | |
2378 | { | |
2379 | warning ("%s: %s", errstr, mach_error_string (err)); | |
2380 | return 0; | |
2381 | } | |
2382 | ||
2383 | return length; | |
2384 | } | |
2385 | \f | |
2386 | /* Return 0 on failure, number of bytes handled otherwise. */ | |
2387 | static int | |
2388 | gnu_xfer_memory (memaddr, myaddr, len, write, target) | |
2389 | CORE_ADDR memaddr; | |
2390 | char *myaddr; | |
2391 | int len; | |
2392 | int write; | |
2393 | struct target_ops *target; /* IGNORED */ | |
2394 | { | |
2395 | int result; | |
2396 | task_t task = | |
c5aa993b JM |
2397 | current_inferior |
2398 | ? (current_inferior->task ? current_inferior->task->port : 0) | |
2399 | : 0; | |
c906108c SS |
2400 | |
2401 | if (task == MACH_PORT_NULL) | |
2402 | return 0; | |
2403 | else | |
2404 | { | |
2405 | inf_debug (current_inferior, "%s %p[%d] %s %p", | |
2406 | write ? "writing" : "reading", memaddr, len, | |
2407 | write ? "<--" : "-->", myaddr); | |
2408 | if (write) | |
2409 | return gnu_write_inferior (task, memaddr, myaddr, len); | |
2410 | else | |
c5aa993b | 2411 | return gnu_read_inferior (task, memaddr, myaddr, len); |
c906108c SS |
2412 | } |
2413 | } | |
2414 | \f | |
ed9a39eb JM |
2415 | /* Return printable description of proc. */ |
2416 | static char * | |
2417 | proc_string (struct proc *proc) | |
2418 | { | |
2419 | static char tid_str[80]; | |
2420 | if (proc_is_task (proc)) | |
2421 | sprintf (tid_str, "process %d", proc->inf->pid); | |
2422 | else | |
2423 | sprintf (tid_str, "thread %d.%d", | |
2424 | proc->inf->pid, pid_to_thread_id (proc->tid)); | |
2425 | return tid_str; | |
2426 | } | |
2427 | ||
2428 | static char * | |
2429 | gnu_pid_to_str (int tid) | |
2430 | { | |
2431 | struct inf *inf = current_inferior; | |
2432 | struct proc *thread = inf_tid_to_thread (inf, tid); | |
2433 | ||
2434 | if (thread) | |
2435 | return proc_string (thread); | |
2436 | else | |
2437 | { | |
2438 | static char tid_str[80]; | |
2439 | sprintf (tid_str, "bogus thread id %d", tid); | |
2440 | return tid_str; | |
2441 | } | |
2442 | } | |
2443 | \f | |
c906108c SS |
2444 | extern void gnu_store_registers (int regno); |
2445 | extern void gnu_fetch_registers (int regno); | |
2446 | ||
c5aa993b | 2447 | struct target_ops gnu_ops; |
c906108c SS |
2448 | |
2449 | static void | |
c5aa993b JM |
2450 | init_gnu_ops (void) |
2451 | { | |
2452 | gnu_ops.to_shortname = "GNU"; /* to_shortname */ | |
2453 | gnu_ops.to_longname = "GNU Hurd process"; /* to_longname */ | |
2454 | gnu_ops.to_doc = "GNU Hurd process"; /* to_doc */ | |
2455 | gnu_ops.to_open = gnu_open; /* to_open */ | |
2456 | gnu_ops.to_close = 0; /* to_close */ | |
2457 | gnu_ops.to_attach = gnu_attach; /* to_attach */ | |
c906108c | 2458 | gnu_ops.to_post_attach = NULL; |
c5aa993b JM |
2459 | gnu_ops.to_require_attach = NULL; /* to_require_attach */ |
2460 | gnu_ops.to_detach = gnu_detach; /* to_detach */ | |
2461 | gnu_ops.to_require_detach = NULL; /* to_require_detach */ | |
2462 | gnu_ops.to_resume = gnu_resume; /* to_resume */ | |
2463 | gnu_ops.to_wait = gnu_wait; /* to_wait */ | |
2464 | gnu_ops.to_post_wait = NULL; /* to_post_wait */ | |
2465 | gnu_ops.to_fetch_registers = gnu_fetch_registers; /* to_fetch_registers */ | |
2466 | gnu_ops.to_store_registers = gnu_store_registers; /* to_store_registers */ | |
2467 | gnu_ops.to_prepare_to_store = gnu_prepare_to_store; /* to_prepare_to_store */ | |
2468 | gnu_ops.to_xfer_memory = gnu_xfer_memory; /* to_xfer_memory */ | |
2469 | gnu_ops.to_files_info = 0; /* to_files_info */ | |
2470 | gnu_ops.to_insert_breakpoint = memory_insert_breakpoint; | |
2471 | gnu_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
2472 | gnu_ops.to_terminal_init = gnu_terminal_init_inferior; | |
2473 | gnu_ops.to_terminal_inferior = terminal_inferior; | |
2474 | gnu_ops.to_terminal_ours_for_output = terminal_ours_for_output; | |
2475 | gnu_ops.to_terminal_ours = terminal_ours; | |
2476 | gnu_ops.to_terminal_info = child_terminal_info; | |
2477 | gnu_ops.to_kill = gnu_kill_inferior; /* to_kill */ | |
2478 | gnu_ops.to_load = 0; /* to_load */ | |
2479 | gnu_ops.to_lookup_symbol = 0; /* to_lookup_symbol */ | |
2480 | gnu_ops.to_create_inferior = gnu_create_inferior; /* to_create_inferior */ | |
2481 | gnu_ops.to_post_startup_inferior = NULL; /* to_post_startup_inferior */ | |
2482 | gnu_ops.to_acknowledge_created_inferior = NULL; /* to_acknowledge_created_inferior */ | |
2483 | gnu_ops.to_clone_and_follow_inferior = NULL; /* to_clone_and_follow_inferior */ | |
2484 | gnu_ops.to_post_follow_inferior_by_clone = NULL; /* to_post_follow_inferior_by_clone */ | |
c906108c SS |
2485 | gnu_ops.to_insert_fork_catchpoint = NULL; |
2486 | gnu_ops.to_remove_fork_catchpoint = NULL; | |
2487 | gnu_ops.to_insert_vfork_catchpoint = NULL; | |
2488 | gnu_ops.to_remove_vfork_catchpoint = NULL; | |
c5aa993b JM |
2489 | gnu_ops.to_has_forked = NULL; /* to_has_forked */ |
2490 | gnu_ops.to_has_vforked = NULL; /* to_has_vforked */ | |
c906108c | 2491 | gnu_ops.to_can_follow_vfork_prior_to_exec = NULL; |
c5aa993b | 2492 | gnu_ops.to_post_follow_vfork = NULL; /* to_post_follow_vfork */ |
c906108c SS |
2493 | gnu_ops.to_insert_exec_catchpoint = NULL; |
2494 | gnu_ops.to_remove_exec_catchpoint = NULL; | |
2495 | gnu_ops.to_has_execd = NULL; | |
2496 | gnu_ops.to_reported_exec_events_per_exec_call = NULL; | |
2497 | gnu_ops.to_has_exited = NULL; | |
c5aa993b JM |
2498 | gnu_ops.to_mourn_inferior = gnu_mourn_inferior; /* to_mourn_inferior */ |
2499 | gnu_ops.to_can_run = gnu_can_run; /* to_can_run */ | |
2500 | gnu_ops.to_notice_signals = 0; /* to_notice_signals */ | |
2501 | gnu_ops.to_thread_alive = gnu_thread_alive; /* to_thread_alive */ | |
ed9a39eb | 2502 | gnu_ops.to_pid_to_str = gnu_pid_to_str; /* to_pid_to_str */ |
c5aa993b JM |
2503 | gnu_ops.to_stop = gnu_stop; /* to_stop */ |
2504 | gnu_ops.to_pid_to_exec_file = gnu_pid_to_exec_file; /* to_pid_to_exec_file */ | |
c906108c | 2505 | gnu_ops.to_core_file_to_sym_file = NULL; |
c5aa993b JM |
2506 | gnu_ops.to_stratum = process_stratum; /* to_stratum */ |
2507 | gnu_ops.DONT_USE = 0; /* to_next */ | |
2508 | gnu_ops.to_has_all_memory = 1; /* to_has_all_memory */ | |
2509 | gnu_ops.to_has_memory = 1; /* to_has_memory */ | |
2510 | gnu_ops.to_has_stack = 1; /* to_has_stack */ | |
2511 | gnu_ops.to_has_registers = 1; /* to_has_registers */ | |
2512 | gnu_ops.to_has_execution = 1; /* to_has_execution */ | |
2513 | gnu_ops.to_sections = 0; /* sections */ | |
2514 | gnu_ops.to_sections_end = 0; /* sections_end */ | |
2515 | gnu_ops.to_magic = OPS_MAGIC; /* to_magic */ | |
2516 | } /* init_gnu_ops */ | |
c906108c | 2517 | \f |
c906108c SS |
2518 | /* User task commands. */ |
2519 | ||
2520 | struct cmd_list_element *set_task_cmd_list = 0; | |
2521 | struct cmd_list_element *show_task_cmd_list = 0; | |
2522 | /* User thread commands. */ | |
2523 | ||
2524 | /* Commands with a prefix of `set/show thread'. */ | |
2525 | extern struct cmd_list_element *thread_cmd_list; | |
2526 | struct cmd_list_element *set_thread_cmd_list = NULL; | |
2527 | struct cmd_list_element *show_thread_cmd_list = NULL; | |
2528 | ||
2529 | /* Commands with a prefix of `set/show thread default'. */ | |
2530 | struct cmd_list_element *set_thread_default_cmd_list = NULL; | |
2531 | struct cmd_list_element *show_thread_default_cmd_list = NULL; | |
2532 | ||
2533 | static void | |
2534 | set_thread_cmd (char *args, int from_tty) | |
2535 | { | |
9846de1b | 2536 | printf_unfiltered ("\"set thread\" must be followed by the name of a thread property, or \"default\".\n"); |
c906108c SS |
2537 | } |
2538 | ||
2539 | static void | |
2540 | show_thread_cmd (char *args, int from_tty) | |
2541 | { | |
2542 | printf_unfiltered ("\"show thread\" must be followed by the name of a thread property, or \"default\".\n"); | |
2543 | } | |
2544 | ||
2545 | static void | |
2546 | set_thread_default_cmd (char *args, int from_tty) | |
2547 | { | |
2548 | printf_unfiltered ("\"set thread default\" must be followed by the name of a thread property.\n"); | |
2549 | } | |
2550 | ||
2551 | static void | |
2552 | show_thread_default_cmd (char *args, int from_tty) | |
2553 | { | |
2554 | printf_unfiltered ("\"show thread default\" must be followed by the name of a thread property.\n"); | |
2555 | } | |
2556 | ||
2557 | static int | |
2558 | parse_int_arg (char *args, char *cmd_prefix) | |
2559 | { | |
2560 | if (args) | |
2561 | { | |
2562 | char *arg_end; | |
2563 | int val = strtoul (args, &arg_end, 10); | |
2564 | if (*args && *arg_end == '\0') | |
2565 | return val; | |
2566 | } | |
2567 | error ("Illegal argument for \"%s\" command, should be an integer.", cmd_prefix); | |
2568 | } | |
2569 | ||
2570 | static int | |
2571 | _parse_bool_arg (char *args, char *t_val, char *f_val, char *cmd_prefix) | |
2572 | { | |
2573 | if (!args || strcmp (args, t_val) == 0) | |
2574 | return 1; | |
2575 | else if (strcmp (args, f_val) == 0) | |
2576 | return 0; | |
2577 | else | |
2578 | error ("Illegal argument for \"%s\" command, should be \"%s\" or \"%s\".", | |
2579 | cmd_prefix, t_val, f_val); | |
2580 | } | |
2581 | ||
2582 | #define parse_bool_arg(args, cmd_prefix) \ | |
2583 | _parse_bool_arg (args, "on", "off", cmd_prefix) | |
2584 | ||
2585 | static void | |
2586 | check_empty (char *args, char *cmd_prefix) | |
2587 | { | |
2588 | if (args) | |
2589 | error ("Garbage after \"%s\" command: `%s'", cmd_prefix, args); | |
2590 | } | |
2591 | ||
2592 | /* Returns the alive thread named by INFERIOR_PID, or signals an error. */ | |
2593 | static struct proc * | |
2594 | cur_thread () | |
2595 | { | |
2596 | struct inf *inf = cur_inf (); | |
2597 | struct proc *thread = inf_tid_to_thread (inf, inferior_pid); | |
2598 | if (!thread) | |
2599 | error ("No current thread."); | |
2600 | return thread; | |
2601 | } | |
2602 | ||
2603 | /* Returns the current inferior, but signals an error if it has no task. */ | |
2604 | static struct inf * | |
2605 | active_inf () | |
2606 | { | |
2607 | struct inf *inf = cur_inf (); | |
c5aa993b | 2608 | if (!inf->task) |
c906108c SS |
2609 | error ("No current process."); |
2610 | return inf; | |
2611 | } | |
2612 | \f | |
2613 | static void | |
2614 | set_task_pause_cmd (char *args, int from_tty) | |
2615 | { | |
2616 | struct inf *inf = cur_inf (); | |
2617 | int old_sc = inf->pause_sc; | |
2618 | ||
2619 | inf->pause_sc = parse_bool_arg (args, "set task pause"); | |
2620 | ||
2621 | if (old_sc == 0 && inf->pause_sc != 0) | |
2622 | /* If the task is currently unsuspended, immediately suspend it, | |
2623 | otherwise wait until the next time it gets control. */ | |
2624 | inf_suspend (inf); | |
2625 | } | |
2626 | ||
2627 | static void | |
2628 | show_task_pause_cmd (char *args, int from_tty) | |
2629 | { | |
2630 | struct inf *inf = cur_inf (); | |
2631 | check_empty (args, "show task pause"); | |
2632 | printf_unfiltered ("The inferior task %s suspended while gdb has control.\n", | |
2633 | inf->task | |
2634 | ? (inf->pause_sc == 0 ? "isn't" : "is") | |
2635 | : (inf->pause_sc == 0 ? "won't be" : "will be")); | |
2636 | } | |
2637 | ||
2638 | static void | |
2639 | set_task_detach_sc_cmd (char *args, int from_tty) | |
2640 | { | |
2641 | cur_inf ()->detach_sc = parse_int_arg (args, "set task detach-suspend-count"); | |
2642 | } | |
2643 | ||
2644 | static void | |
2645 | show_task_detach_sc_cmd (char *args, int from_tty) | |
2646 | { | |
2647 | check_empty (args, "show task detach-suspend-count"); | |
2648 | printf_unfiltered ("The inferior task will be left with a suspend count of %d when detaching.\n", | |
2649 | cur_inf ()->detach_sc); | |
2650 | } | |
2651 | \f | |
2652 | static void | |
2653 | set_thread_default_pause_cmd (char *args, int from_tty) | |
2654 | { | |
2655 | struct inf *inf = cur_inf (); | |
2656 | inf->default_thread_pause_sc = | |
2657 | parse_bool_arg (args, "set thread default pause") ? 0 : 1; | |
2658 | } | |
2659 | ||
2660 | static void | |
2661 | show_thread_default_pause_cmd (char *args, int from_tty) | |
2662 | { | |
2663 | struct inf *inf = cur_inf (); | |
2664 | int sc = inf->default_thread_pause_sc; | |
2665 | check_empty (args, "show thread default pause"); | |
2666 | printf_unfiltered ("New threads %s suspended while gdb has control%s.\n", | |
2667 | sc ? "are" : "aren't", | |
2668 | !sc && inf->pause_sc ? " (but the task is)" : ""); | |
2669 | } | |
2670 | ||
2671 | static void | |
2672 | set_thread_default_run_cmd (char *args, int from_tty) | |
2673 | { | |
2674 | struct inf *inf = cur_inf (); | |
2675 | inf->default_thread_run_sc = | |
2676 | parse_bool_arg (args, "set thread default run") ? 0 : 1; | |
2677 | } | |
2678 | ||
2679 | static void | |
2680 | show_thread_default_run_cmd (char *args, int from_tty) | |
2681 | { | |
2682 | struct inf *inf = cur_inf (); | |
2683 | check_empty (args, "show thread default run"); | |
2684 | printf_unfiltered ("New threads %s allowed to run.\n", | |
2685 | inf->default_thread_run_sc == 0 ? "are" : "aren't"); | |
2686 | } | |
2687 | ||
2688 | static void | |
2689 | set_thread_default_detach_sc_cmd (char *args, int from_tty) | |
2690 | { | |
2691 | cur_inf ()->default_thread_detach_sc = | |
2692 | parse_int_arg (args, "set thread default detach-suspend-count"); | |
2693 | } | |
2694 | ||
2695 | static void | |
2696 | show_thread_default_detach_sc_cmd (char *args, int from_tty) | |
2697 | { | |
2698 | check_empty (args, "show thread default detach-suspend-count"); | |
2699 | printf_unfiltered ("New threads will get a detach-suspend-count of %d.\n", | |
2700 | cur_inf ()->default_thread_detach_sc); | |
2701 | } | |
2702 | \f | |
2703 | /* Steal a send right called NAME in the inferior task, and make it PROC's | |
2704 | saved exception port. */ | |
2705 | static void | |
2706 | steal_exc_port (struct proc *proc, mach_port_t name) | |
2707 | { | |
2708 | error_t err; | |
2709 | mach_port_t port; | |
2710 | mach_msg_type_name_t port_type; | |
2711 | ||
2712 | if (!proc || !proc->inf->task) | |
2713 | error ("No inferior task."); | |
2714 | ||
2715 | err = mach_port_extract_right (proc->inf->task->port, | |
2716 | name, MACH_MSG_TYPE_COPY_SEND, | |
2717 | &port, &port_type); | |
2718 | if (err) | |
2719 | error ("Couldn't extract send right %d from inferior: %s", | |
2720 | name, strerror (err)); | |
2721 | ||
2722 | if (proc->saved_exc_port) | |
2723 | /* Get rid of our reference to the old one. */ | |
2724 | mach_port_deallocate (mach_task_self (), proc->saved_exc_port); | |
2725 | ||
2726 | proc->saved_exc_port = port; | |
2727 | ||
c5aa993b | 2728 | if (!proc->exc_port) |
c906108c SS |
2729 | /* If PROC is a thread, we may not have set its exception port before. |
2730 | We can't use proc_steal_exc_port because it also sets saved_exc_port. */ | |
2731 | { | |
c5aa993b JM |
2732 | proc->exc_port = proc->inf->event_port; |
2733 | err = proc_set_exception_port (proc, proc->exc_port); | |
2734 | error ("Can't set exception port for %s: %s", | |
2735 | proc_string (proc), strerror (err)); | |
c906108c SS |
2736 | } |
2737 | } | |
2738 | \f | |
2739 | static void | |
2740 | set_task_exc_port_cmd (char *args, int from_tty) | |
2741 | { | |
2742 | struct inf *inf = cur_inf (); | |
2743 | if (!args) | |
2744 | error ("No argument to \"set task exception-port\" command."); | |
2745 | steal_exc_port (inf->task, parse_and_eval_address (args)); | |
2746 | } | |
2747 | ||
c5aa993b | 2748 | static void |
c906108c SS |
2749 | set_stopped_cmd (char *args, int from_tty) |
2750 | { | |
2751 | cur_inf ()->stopped = _parse_bool_arg (args, "yes", "no", "set stopped"); | |
2752 | } | |
2753 | ||
2754 | static void | |
2755 | show_stopped_cmd (char *args, int from_tty) | |
2756 | { | |
2757 | struct inf *inf = active_inf (); | |
2758 | check_empty (args, "show stopped"); | |
2759 | printf_unfiltered ("The inferior process %s stopped.\n", | |
2760 | inf->stopped ? "is" : "isn't"); | |
2761 | } | |
2762 | ||
c5aa993b | 2763 | static void |
c906108c SS |
2764 | set_sig_thread_cmd (char *args, int from_tty) |
2765 | { | |
2766 | int tid; | |
2767 | struct inf *inf = cur_inf (); | |
2768 | ||
c5aa993b | 2769 | if (!args || (!isdigit (*args) && strcmp (args, "none") != 0)) |
c906108c SS |
2770 | error ("Illegal argument to \"set signal-thread\" command.\n" |
2771 | "Should be an integer thread ID, or `none'."); | |
2772 | ||
2773 | if (strcmp (args, "none") == 0) | |
2774 | inf->signal_thread = 0; | |
2775 | else | |
2776 | { | |
2777 | int tid = thread_id_to_pid (atoi (args)); | |
2778 | if (tid < 0) | |
2779 | error ("Thread ID %s not known. Use the \"info threads\" command to\n" | |
2780 | "see the IDs of currently known threads.", args); | |
2781 | inf->signal_thread = inf_tid_to_thread (inf, tid); | |
2782 | } | |
2783 | } | |
2784 | ||
2785 | static void | |
2786 | show_sig_thread_cmd (char *args, int from_tty) | |
2787 | { | |
2788 | struct inf *inf = active_inf (); | |
2789 | check_empty (args, "show signal-thread"); | |
2790 | if (inf->signal_thread) | |
2791 | printf_unfiltered ("The signal thread is %s.\n", | |
2792 | proc_string (inf->signal_thread)); | |
2793 | else | |
2794 | printf_unfiltered ("There is no signal thread.\n"); | |
2795 | } | |
2796 | \f | |
c5aa993b | 2797 | static void |
c906108c SS |
2798 | set_signals_cmd (char *args, int from_tty) |
2799 | { | |
2800 | int trace; | |
2801 | struct inf *inf = cur_inf (); | |
2802 | ||
2803 | inf->want_signals = parse_bool_arg (args, "set signals"); | |
2804 | ||
2805 | if (inf->task && inf->want_signals != inf->traced) | |
2806 | /* Make this take effect immediately in a running process. */ | |
2807 | inf_set_traced (inf, inf->want_signals); | |
2808 | } | |
2809 | ||
2810 | static void | |
2811 | show_signals_cmd (char *args, int from_tty) | |
2812 | { | |
2813 | struct inf *inf = cur_inf (); | |
2814 | check_empty (args, "show signals"); | |
2815 | printf_unfiltered ("The inferior process's signals %s intercepted.\n", | |
2816 | inf->task | |
2817 | ? (inf->traced ? "are" : "aren't") | |
2818 | : (inf->want_signals ? "will be" : "won't be")); | |
2819 | } | |
2820 | ||
c5aa993b | 2821 | static void |
c906108c SS |
2822 | set_exceptions_cmd (char *args, int from_tty) |
2823 | { | |
2824 | struct inf *inf = cur_inf (); | |
2825 | int val = parse_bool_arg (args, "set exceptions"); | |
2826 | ||
2827 | if (inf->task && inf->want_exceptions != val) | |
2828 | /* Make this take effect immediately in a running process. */ | |
c5aa993b | 2829 | /* XXX */ ; |
c906108c SS |
2830 | |
2831 | inf->want_exceptions = val; | |
2832 | } | |
2833 | ||
2834 | static void | |
2835 | show_exceptions_cmd (char *args, int from_tty) | |
2836 | { | |
2837 | struct inf *inf = cur_inf (); | |
2838 | check_empty (args, "show exceptions"); | |
2839 | printf_unfiltered ("Exceptions in the inferior %s trapped.\n", | |
2840 | inf->task | |
2841 | ? (inf->want_exceptions ? "are" : "aren't") | |
2842 | : (inf->want_exceptions ? "will be" : "won't be")); | |
2843 | } | |
2844 | \f | |
2845 | static void | |
2846 | set_task_cmd (char *args, int from_tty) | |
2847 | { | |
2848 | printf_unfiltered ("\"set task\" must be followed by the name of a task property.\n"); | |
2849 | } | |
2850 | ||
2851 | static void | |
2852 | show_task_cmd (char *args, int from_tty) | |
2853 | { | |
2854 | struct inf *inf = cur_inf (); | |
2855 | ||
2856 | check_empty (args, "show task"); | |
2857 | ||
2858 | show_signals_cmd (0, from_tty); | |
2859 | show_exceptions_cmd (0, from_tty); | |
2860 | show_task_pause_cmd (0, from_tty); | |
2861 | ||
2862 | if (inf->pause_sc == 0) | |
2863 | show_thread_default_pause_cmd (0, from_tty); | |
2864 | show_thread_default_run_cmd (0, from_tty); | |
2865 | ||
2866 | if (inf->task) | |
2867 | { | |
2868 | show_stopped_cmd (0, from_tty); | |
2869 | show_sig_thread_cmd (0, from_tty); | |
2870 | } | |
2871 | ||
2872 | if (inf->detach_sc != 0) | |
2873 | show_task_detach_sc_cmd (0, from_tty); | |
2874 | if (inf->default_thread_detach_sc != 0) | |
2875 | show_thread_default_detach_sc_cmd (0, from_tty); | |
2876 | } | |
2877 | \f | |
2878 | static void | |
2879 | set_noninvasive_cmd (char *args, int from_tty) | |
2880 | { | |
2881 | /* Invert the sense of the arg for each component. */ | |
2882 | char *inv_args = parse_bool_arg (args, "set noninvasive") ? "off" : "on"; | |
2883 | ||
2884 | set_task_pause_cmd (inv_args, from_tty); | |
2885 | set_signals_cmd (inv_args, from_tty); | |
2886 | set_exceptions_cmd (inv_args, from_tty); | |
2887 | } | |
2888 | \f | |
2889 | static void | |
2890 | info_port_rights (char *args, mach_port_type_t only) | |
2891 | { | |
2892 | struct inf *inf = active_inf (); | |
2893 | value_ptr vmark = value_mark (); | |
2894 | ||
2895 | if (args) | |
2896 | /* Explicit list of port rights. */ | |
2897 | { | |
2898 | while (*args) | |
2899 | { | |
2900 | value_ptr val = parse_to_comma_and_eval (&args); | |
2901 | long right = value_as_long (val); | |
2902 | error_t err = | |
c5aa993b JM |
2903 | print_port_info (right, 0, inf->task->port, PORTINFO_DETAILS, |
2904 | stdout); | |
c906108c SS |
2905 | if (err) |
2906 | error ("%ld: %s.", right, strerror (err)); | |
2907 | } | |
2908 | } | |
2909 | else | |
2910 | /* Print all of them. */ | |
2911 | { | |
2912 | error_t err = | |
c5aa993b JM |
2913 | print_task_ports_info (inf->task->port, only, PORTINFO_DETAILS, |
2914 | stdout); | |
c906108c SS |
2915 | if (err) |
2916 | error ("%s.", strerror (err)); | |
2917 | } | |
2918 | ||
2919 | value_free_to_mark (vmark); | |
2920 | } | |
2921 | ||
2922 | static void | |
2923 | info_send_rights_cmd (char *args, int from_tty) | |
2924 | { | |
2925 | info_port_rights (args, MACH_PORT_TYPE_SEND); | |
2926 | } | |
2927 | static void | |
2928 | info_recv_rights_cmd (char *args, int from_tty) | |
2929 | { | |
2930 | info_port_rights (args, MACH_PORT_TYPE_RECEIVE); | |
2931 | } | |
2932 | static void | |
2933 | info_port_sets_cmd (char *args, int from_tty) | |
2934 | { | |
2935 | info_port_rights (args, MACH_PORT_TYPE_PORT_SET); | |
2936 | } | |
2937 | static void | |
2938 | info_dead_names_cmd (char *args, int from_tty) | |
2939 | { | |
2940 | info_port_rights (args, MACH_PORT_TYPE_DEAD_NAME); | |
2941 | } | |
2942 | static void | |
2943 | info_port_rights_cmd (char *args, int from_tty) | |
2944 | { | |
2945 | info_port_rights (args, ~0); | |
2946 | } | |
2947 | \f | |
c5aa993b JM |
2948 | static void |
2949 | add_task_commands () | |
c906108c SS |
2950 | { |
2951 | add_cmd ("pause", class_run, set_thread_default_pause_cmd, | |
c5aa993b | 2952 | "Set whether the new threads are suspended while gdb has control.\n" |
c906108c | 2953 | "This property normally has no effect because the whole task is\n" |
c5aa993b | 2954 | "suspended, however, that may be disabled with \"set task pause off\".\n" |
c906108c SS |
2955 | "The default value is \"off\".", |
2956 | &set_thread_default_cmd_list); | |
2957 | add_cmd ("pause", no_class, show_thread_default_pause_cmd, | |
2958 | "Show whether new threads are suspended while gdb has control.", | |
2959 | &show_thread_default_cmd_list); | |
2960 | add_cmd ("run", class_run, set_thread_default_run_cmd, | |
c5aa993b | 2961 | "Set whether new threads are allowed to run (once gdb has noticed them).", |
c906108c SS |
2962 | &set_thread_default_cmd_list); |
2963 | add_cmd ("run", no_class, show_thread_default_run_cmd, | |
c5aa993b | 2964 | "Show whether new threads are allowed to run (once gdb has noticed them).", |
c906108c SS |
2965 | &show_thread_default_cmd_list); |
2966 | add_cmd ("detach-suspend-count", class_run, set_thread_default_detach_sc_cmd, | |
2967 | "Set the default detach-suspend-count value for new threads.", | |
2968 | &set_thread_default_cmd_list); | |
2969 | add_cmd ("detach-suspend-count", no_class, show_thread_default_detach_sc_cmd, | |
2970 | "Show the default detach-suspend-count value for new threads.", | |
2971 | &show_thread_default_cmd_list); | |
2972 | ||
2973 | add_cmd ("signals", class_run, set_signals_cmd, | |
c5aa993b | 2974 | "Set whether the inferior process's signals will be intercepted.\n" |
c906108c SS |
2975 | "Mach exceptions (such as breakpoint traps) are not affected.", |
2976 | &setlist); | |
2977 | add_alias_cmd ("sigs", "signals", class_run, 1, &setlist); | |
2978 | add_cmd ("signals", no_class, show_signals_cmd, | |
c5aa993b | 2979 | "Show whether the inferior process's signals will be intercepted.", |
c906108c SS |
2980 | &showlist); |
2981 | add_alias_cmd ("sigs", "signals", no_class, 1, &showlist); | |
2982 | ||
2983 | add_cmd ("signal-thread", class_run, set_sig_thread_cmd, | |
2984 | "Set the thread that gdb thinks is the libc signal thread.\n" | |
c5aa993b | 2985 | "This thread is run when delivering a signal to a non-stopped process.", |
c906108c SS |
2986 | &setlist); |
2987 | add_alias_cmd ("sigthread", "signal-thread", class_run, 1, &setlist); | |
2988 | add_cmd ("signal-thread", no_class, show_sig_thread_cmd, | |
2989 | "Set the thread that gdb thinks is the libc signal thread.", | |
2990 | &showlist); | |
2991 | add_alias_cmd ("sigthread", "signal-thread", no_class, 1, &showlist); | |
2992 | ||
2993 | add_cmd ("stopped", class_run, set_stopped_cmd, | |
c5aa993b | 2994 | "Set whether gdb thinks the inferior process is stopped as with SIGSTOP.\n" |
c906108c SS |
2995 | "Stopped process will be continued by sending them a signal.", |
2996 | &setlist); | |
2997 | add_cmd ("stopped", no_class, show_signals_cmd, | |
c5aa993b | 2998 | "Show whether gdb thinks the inferior process is stopped as with SIGSTOP.", |
c906108c SS |
2999 | &showlist); |
3000 | ||
3001 | add_cmd ("exceptions", class_run, set_exceptions_cmd, | |
c5aa993b JM |
3002 | "Set whether exceptions in the inferior process will be trapped.\n" |
3003 | "When exceptions are turned off, neither breakpoints nor single-stepping\n" | |
c906108c SS |
3004 | "will work.", |
3005 | &setlist); | |
3006 | /* Allow `set exc' despite conflict with `set exception-port'. */ | |
3007 | add_alias_cmd ("exc", "exceptions", class_run, 1, &setlist); | |
3008 | add_cmd ("exceptions", no_class, show_exceptions_cmd, | |
c5aa993b | 3009 | "Show whether exceptions in the inferior process will be trapped.", |
c906108c SS |
3010 | &showlist); |
3011 | ||
3012 | add_prefix_cmd ("task", no_class, set_task_cmd, | |
3013 | "Command prefix for setting task attributes.", | |
3014 | &set_task_cmd_list, "set task ", 0, &setlist); | |
3015 | add_prefix_cmd ("task", no_class, show_task_cmd, | |
3016 | "Command prefix for showing task attributes.", | |
3017 | &show_task_cmd_list, "show task ", 0, &showlist); | |
3018 | ||
3019 | add_cmd ("pause", class_run, set_task_pause_cmd, | |
3020 | "Set whether the task is suspended while gdb has control.\n" | |
3021 | "A value of \"on\" takes effect immediately, otherwise nothing\n" | |
3022 | "happens until the next time the program is continued.\n" | |
3023 | "When setting this to \"off\", \"set thread default pause on\"\n" | |
3024 | "can be used to pause individual threads by default instead.", | |
3025 | &set_task_cmd_list); | |
3026 | add_cmd ("pause", no_class, show_task_pause_cmd, | |
3027 | "Show whether the task is suspended while gdb has control.", | |
3028 | &show_task_cmd_list); | |
3029 | add_cmd ("detach-suspend-count", class_run, set_task_detach_sc_cmd, | |
3030 | "Set the suspend count will leave on the thread when detaching.", | |
3031 | &set_task_cmd_list); | |
3032 | add_cmd ("detach-suspend-count", no_class, show_task_detach_sc_cmd, | |
3033 | "Show the suspend count will leave on the thread when detaching.", | |
3034 | &show_task_cmd_list); | |
3035 | ||
3036 | add_cmd ("exception-port", no_class, set_task_exc_port_cmd, | |
3037 | "Set the task exception port to which we forward exceptions.\n" | |
3038 | "The argument should be the value of the send right in the task.", | |
3039 | &set_task_cmd_list); | |
3040 | add_alias_cmd ("excp", "exception-port", no_class, 1, &set_task_cmd_list); | |
3041 | add_alias_cmd ("exc-port", "exception-port", no_class, 1, &set_task_cmd_list); | |
3042 | ||
3043 | /* A convenient way of turning on all options require to noninvasively | |
3044 | debug running tasks. */ | |
3045 | add_cmd ("noninvasive", no_class, set_noninvasive_cmd, | |
3046 | "Set task options so that we interfere as little as possible.\n" | |
3047 | "This is the same as setting `task pause', `exceptions', and" | |
3048 | "`signals' to the opposite value.", | |
3049 | &setlist); | |
3050 | ||
3051 | /* Commands to show information about the task's ports. */ | |
3052 | add_cmd ("send-rights", class_info, info_send_rights_cmd, | |
3053 | "Show information about the task's send rights", | |
3054 | &infolist); | |
3055 | add_cmd ("receive-rights", class_info, info_recv_rights_cmd, | |
3056 | "Show information about the task's receive rights", | |
3057 | &infolist); | |
3058 | add_cmd ("port-rights", class_info, info_send_rights_cmd, | |
3059 | "Show information about the task's port rights", | |
3060 | &infolist); | |
3061 | add_cmd ("port-sets", class_info, info_port_sets_cmd, | |
3062 | "Show information about the task's port sets", | |
3063 | &infolist); | |
3064 | add_cmd ("dead-names", class_info, info_dead_names_cmd, | |
3065 | "Show information about the task's dead names", | |
3066 | &infolist); | |
3067 | add_info_alias ("ports", "port-rights", 1); | |
3068 | add_info_alias ("port", "port-rights", 1); | |
3069 | add_info_alias ("psets", "port-sets", 1); | |
3070 | } | |
3071 | \f | |
3072 | ||
3073 | static void | |
3074 | set_thread_pause_cmd (char *args, int from_tty) | |
3075 | { | |
3076 | struct proc *thread = cur_thread (); | |
3077 | int old_sc = thread->pause_sc; | |
3078 | thread->pause_sc = parse_bool_arg (args, "set thread pause"); | |
3079 | if (old_sc == 0 && thread->pause_sc != 0 && thread->inf->pause_sc == 0) | |
3080 | /* If the task is currently unsuspended, immediately suspend it, | |
3081 | otherwise wait until the next time it gets control. */ | |
3082 | inf_suspend (thread->inf); | |
3083 | } | |
3084 | ||
3085 | static void | |
3086 | show_thread_pause_cmd (char *args, int from_tty) | |
3087 | { | |
3088 | struct proc *thread = cur_thread (); | |
3089 | int sc = thread->pause_sc; | |
3090 | check_empty (args, "show task pause"); | |
3091 | printf_unfiltered ("Thread %s %s suspended while gdb has control%s.\n", | |
3092 | proc_string (thread), | |
3093 | sc ? "is" : "isn't", | |
c5aa993b | 3094 | !sc && thread->inf->pause_sc ? " (but the task is)" : ""); |
c906108c SS |
3095 | } |
3096 | ||
3097 | static void | |
3098 | set_thread_run_cmd (char *args, int from_tty) | |
3099 | { | |
3100 | struct proc *thread = cur_thread (); | |
3101 | thread->run_sc = parse_bool_arg (args, "set thread run") ? 0 : 1; | |
3102 | } | |
3103 | ||
3104 | static void | |
3105 | show_thread_run_cmd (char *args, int from_tty) | |
3106 | { | |
3107 | struct proc *thread = cur_thread (); | |
3108 | check_empty (args, "show thread run"); | |
3109 | printf_unfiltered ("Thread %s %s allowed to run.", | |
3110 | proc_string (thread), | |
3111 | thread->run_sc == 0 ? "is" : "isn't"); | |
3112 | } | |
3113 | ||
3114 | static void | |
3115 | set_thread_detach_sc_cmd (char *args, int from_tty) | |
3116 | { | |
3117 | cur_thread ()->detach_sc = parse_int_arg (args, "set thread detach-suspend-count"); | |
3118 | } | |
3119 | ||
3120 | static void | |
3121 | show_thread_detach_sc_cmd (char *args, int from_tty) | |
3122 | { | |
3123 | struct proc *thread = cur_thread (); | |
3124 | check_empty (args, "show thread detach-suspend-count"); | |
3125 | printf_unfiltered ("Thread %s will be left with a suspend count of %d when detaching.\n", | |
3126 | proc_string (thread), | |
3127 | thread->detach_sc); | |
3128 | } | |
3129 | ||
3130 | static void | |
3131 | set_thread_exc_port_cmd (char *args, int from_tty) | |
3132 | { | |
3133 | struct proc *thread = cur_thread (); | |
3134 | if (!args) | |
3135 | error ("No argument to \"set thread exception-port\" command."); | |
3136 | steal_exc_port (thread, parse_and_eval_address (args)); | |
3137 | } | |
3138 | ||
3139 | #if 0 | |
3140 | static void | |
3141 | show_thread_cmd (char *args, int from_tty) | |
3142 | { | |
3143 | struct proc *thread = cur_thread (); | |
3144 | check_empty (args, "show thread"); | |
3145 | show_thread_run_cmd (0, from_tty); | |
3146 | show_thread_pause_cmd (0, from_tty); | |
3147 | if (thread->detach_sc != 0) | |
3148 | show_thread_detach_sc_cmd (0, from_tty); | |
3149 | } | |
3150 | #endif | |
3151 | ||
3152 | static void | |
3153 | thread_takeover_sc_cmd (char *args, int from_tty) | |
3154 | { | |
3155 | struct proc *thread = cur_thread (); | |
3156 | thread_basic_info_data_t _info; | |
3157 | thread_basic_info_t info = &_info; | |
3158 | mach_msg_type_number_t info_len = THREAD_BASIC_INFO_COUNT; | |
3159 | error_t err = | |
c5aa993b | 3160 | thread_info (thread->port, THREAD_BASIC_INFO, (int *) &info, &info_len); |
c906108c SS |
3161 | if (err) |
3162 | error ("%s.", strerror (err)); | |
3163 | thread->sc = info->suspend_count; | |
3164 | if (from_tty) | |
3165 | printf_unfiltered ("Suspend count was %d.\n", thread->sc); | |
3166 | if (info != &_info) | |
c5aa993b | 3167 | vm_deallocate (mach_task_self (), (vm_address_t) info, info_len * sizeof (int)); |
c906108c SS |
3168 | } |
3169 | ||
3170 | add_thread_commands () | |
3171 | { | |
3172 | add_prefix_cmd ("thread", no_class, set_thread_cmd, | |
3173 | "Command prefix for setting thread properties.", | |
3174 | &set_thread_cmd_list, "set thread ", 0, &setlist); | |
3175 | add_prefix_cmd ("default", no_class, show_thread_cmd, | |
3176 | "Command prefix for setting default thread properties.", | |
3177 | &set_thread_default_cmd_list, "set thread default ", 0, | |
3178 | &set_thread_cmd_list); | |
3179 | add_prefix_cmd ("thread", no_class, set_thread_default_cmd, | |
3180 | "Command prefix for showing thread properties.", | |
3181 | &show_thread_cmd_list, "show thread ", 0, &showlist); | |
3182 | add_prefix_cmd ("default", no_class, show_thread_default_cmd, | |
3183 | "Command prefix for showing default thread properties.", | |
3184 | &show_thread_default_cmd_list, "show thread default ", 0, | |
3185 | &show_thread_cmd_list); | |
3186 | ||
3187 | add_cmd ("pause", class_run, set_thread_pause_cmd, | |
c5aa993b | 3188 | "Set whether the current thread is suspended while gdb has control.\n" |
c906108c SS |
3189 | "A value of \"on\" takes effect immediately, otherwise nothing\n" |
3190 | "happens until the next time the program is continued. This\n" | |
c5aa993b | 3191 | "property normally has no effect because the whole task is suspended,\n" |
c906108c SS |
3192 | "however, that may be disabled with \"set task pause off\".\n" |
3193 | "The default value is \"off\".", | |
3194 | &set_thread_cmd_list); | |
3195 | add_cmd ("pause", no_class, show_thread_pause_cmd, | |
c5aa993b | 3196 | "Show whether the current thread is suspended while gdb has control.", |
c906108c SS |
3197 | &show_thread_cmd_list); |
3198 | ||
3199 | add_cmd ("run", class_run, set_thread_run_cmd, | |
3200 | "Set whether the current thread is allowed to run.", | |
3201 | &set_thread_cmd_list); | |
3202 | add_cmd ("run", no_class, show_thread_run_cmd, | |
3203 | "Show whether the current thread is allowed to run.", | |
3204 | &show_thread_cmd_list); | |
3205 | ||
3206 | add_cmd ("detach-suspend-count", class_run, set_thread_detach_sc_cmd, | |
3207 | "Set the suspend count will leave on the thread when detaching.\n" | |
3208 | "Note that this is relative to suspend count when gdb noticed the thread;\n" | |
3209 | "use the `thread takeover-suspend-count' to force it to an absolute value.", | |
3210 | &set_thread_cmd_list); | |
3211 | add_cmd ("detach-suspend-count", no_class, show_thread_detach_sc_cmd, | |
3212 | "Show the suspend count will leave on the thread when detaching." | |
3213 | "Note that this is relative to suspend count when gdb noticed the thread;\n" | |
3214 | "use the `thread takeover-suspend-count' to force it to an absolute value.", | |
3215 | &show_thread_cmd_list); | |
3216 | ||
3217 | add_cmd ("exception-port", no_class, set_thread_exc_port_cmd, | |
3218 | "Set the exception port to which we forward exceptions for the\n" | |
3219 | "current thread, overriding the task exception port.\n" | |
3220 | "The argument should be the value of the send right in the task.", | |
3221 | &set_thread_cmd_list); | |
3222 | add_alias_cmd ("excp", "exception-port", no_class, 1, &set_thread_cmd_list); | |
3223 | add_alias_cmd ("exc-port", "exception-port", no_class, 1, &set_thread_cmd_list); | |
3224 | ||
3225 | add_cmd ("takeover-suspend-count", no_class, thread_takeover_sc_cmd, | |
3226 | "Force the threads absolute suspend-count to be gdb's.\n" | |
3227 | "Prior to giving this command, gdb's thread suspend-counts are relative to\n" | |
c5aa993b | 3228 | "the thread's initial suspend-count when gdb notices the threads.", |
c906108c SS |
3229 | &thread_cmd_list); |
3230 | } | |
3231 | \f | |
3232 | void | |
3233 | _initialize_gnu_nat () | |
3234 | { | |
3235 | proc_server = getproc (); | |
c5aa993b | 3236 | init_gnu_ops (); |
c906108c SS |
3237 | add_target (&gnu_ops); |
3238 | add_task_commands (); | |
3239 | add_thread_commands (); | |
3240 | ||
c906108c | 3241 | add_set_cmd ("gnu-debug", class_maintenance, |
c5aa993b JM |
3242 | var_boolean, (char *) &gnu_debug_flag, |
3243 | "Set debugging output for the gnu backend.", &maintenancelist); | |
c906108c SS |
3244 | } |
3245 | \f | |
3246 | #ifdef FLUSH_INFERIOR_CACHE | |
3247 | ||
3248 | /* When over-writing code on some machines the I-Cache must be flushed | |
3249 | explicitly, because it is not kept coherent by the lazy hardware. | |
3250 | This definitely includes breakpoints, for instance, or else we | |
3251 | end up looping in mysterious Bpt traps */ | |
3252 | ||
3253 | void | |
c5aa993b | 3254 | flush_inferior_icache (pc, amount) |
c906108c SS |
3255 | CORE_ADDR pc; |
3256 | { | |
3257 | vm_machine_attribute_val_t flush = MATTR_VAL_ICACHE_FLUSH; | |
c5aa993b JM |
3258 | error_t ret; |
3259 | ||
c906108c SS |
3260 | ret = vm_machine_attribute (current_inferior->task->port, |
3261 | pc, | |
3262 | amount, | |
3263 | MATTR_CACHE, | |
3264 | &flush); | |
3265 | if (ret != KERN_SUCCESS) | |
3266 | warning ("Error flushing inferior's cache : %s", strerror (ret)); | |
3267 | } | |
c5aa993b | 3268 | #endif /* FLUSH_INFERIOR_CACHE */ |