1 /* Interface GDB to the GNU Hurd.
2 Copyright (C) 1992-2014 Free Software Foundation, Inc.
4 This file is part of GDB.
6 Written by Miles Bader <miles@gnu.ai.mit.edu>
8 Some code and ideas from m3-nat.c by Jukka Virtanen <jtv@hut.fi>
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 3 of the License, or
13 (at your option) any later version.
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.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>. */
29 #include <sys/ptrace.h>
32 #include <mach_error.h>
33 #include <mach/exception.h>
34 #include <mach/message.h>
35 #include <mach/notify.h>
36 #include <mach/vm_attributes.h>
39 #include <hurd/interrupt.h>
41 #include <hurd/msg_request.h>
42 #include <hurd/process.h>
43 /* Defined in <hurd/process.h>, but we need forward declarations from
44 <hurd/process_request.h> as well. */
46 #include <hurd/process_request.h>
47 #include <hurd/signal.h>
48 #include <hurd/sigpreempt.h>
60 #include "gdbthread.h"
61 #include "gdb_obstack.h"
64 #include "inf-child.h"
66 #include "exc_request_S.h"
68 #include "process_reply_S.h"
69 #include "msg_reply_S.h"
70 #include "exc_request_U.h"
73 static process_t proc_server
= MACH_PORT_NULL
;
75 /* If we've sent a proc_wait_request to the proc server, the pid of the
76 process we asked about. We can only ever have one outstanding. */
77 int proc_wait_pid
= 0;
79 /* The number of wait requests we've sent, and expect replies from. */
80 int proc_waits_pending
= 0;
82 int gnu_debug_flag
= 0;
86 static struct inf
*make_inf ();
87 void inf_clear_wait (struct inf
*inf
);
88 void inf_cleanup (struct inf
*inf
);
89 void inf_startup (struct inf
*inf
, int pid
);
90 int inf_update_suspends (struct inf
*inf
);
91 void inf_set_pid (struct inf
*inf
, pid_t pid
);
92 void inf_validate_procs (struct inf
*inf
);
93 void inf_steal_exc_ports (struct inf
*inf
);
94 void inf_restore_exc_ports (struct inf
*inf
);
95 void inf_set_threads_resume_sc (struct inf
*inf
,
96 struct proc
*run_thread
,
98 int inf_set_threads_resume_sc_for_signal_thread (struct inf
*inf
);
99 void inf_suspend (struct inf
*inf
);
100 void inf_resume (struct inf
*inf
);
101 void inf_set_step_thread (struct inf
*inf
, struct proc
*proc
);
102 void inf_detach (struct inf
*inf
);
103 void inf_attach (struct inf
*inf
, int pid
);
104 void inf_signal (struct inf
*inf
, enum gdb_signal sig
);
105 void inf_continue (struct inf
*inf
);
107 #define inf_debug(_inf, msg, args...) \
108 do { struct inf *__inf = (_inf); \
109 debug ("{inf %d %s}: " msg, __inf->pid, \
110 host_address_to_string (__inf) , ##args); } while (0)
112 void proc_abort (struct proc
*proc
, int force
);
113 struct proc
*make_proc (struct inf
*inf
, mach_port_t port
, int tid
);
114 struct proc
*_proc_free (struct proc
*proc
);
115 int proc_update_sc (struct proc
*proc
);
116 error_t
proc_get_exception_port (struct proc
*proc
, mach_port_t
* port
);
117 error_t
proc_set_exception_port (struct proc
*proc
, mach_port_t port
);
118 static mach_port_t
_proc_get_exc_port (struct proc
*proc
);
119 void proc_steal_exc_port (struct proc
*proc
, mach_port_t exc_port
);
120 void proc_restore_exc_port (struct proc
*proc
);
121 int proc_trace (struct proc
*proc
, int set
);
123 /* Evaluate RPC_EXPR in a scope with the variables MSGPORT and REFPORT bound
124 to INF's msg port and task port respectively. If it has no msg port,
125 EIEIO is returned. INF must refer to a running process! */
126 #define INF_MSGPORT_RPC(inf, rpc_expr) \
127 HURD_MSGPORT_RPC (proc_getmsgport (proc_server, inf->pid, &msgport), \
128 (refport = inf->task->port, 0), 0, \
129 msgport ? (rpc_expr) : EIEIO)
131 /* Like INF_MSGPORT_RPC, but will also resume the signal thread to ensure
132 there's someone around to deal with the RPC (and resuspend things
133 afterwards). This effects INF's threads' resume_sc count. */
134 #define INF_RESUME_MSGPORT_RPC(inf, rpc_expr) \
135 (inf_set_threads_resume_sc_for_signal_thread (inf) \
138 __e = INF_MSGPORT_RPC (inf, rpc_expr); \
144 /* The state passed by an exception message. */
147 int exception
; /* The exception code. */
149 mach_port_t handler
; /* The real exception port to handle this. */
150 mach_port_t reply
; /* The reply port from the exception call. */
153 /* The results of the last wait an inf did. */
156 struct target_waitstatus status
; /* The status returned to gdb. */
157 struct exc_state exc
; /* The exception that caused us to return. */
158 struct proc
*thread
; /* The thread in question. */
159 int suppress
; /* Something trivial happened. */
162 /* The state of an inferior. */
165 /* Fields describing the current inferior. */
167 struct proc
*task
; /* The mach task. */
168 struct proc
*threads
; /* A linked list of all threads in TASK. */
170 /* True if THREADS needn't be validated by querying the task. We
171 assume that we and the task in question are the only ones
172 frobbing the thread list, so as long as we don't let any code
173 run, we don't have to worry about THREADS changing. */
174 int threads_up_to_date
;
176 pid_t pid
; /* The real system PID. */
178 struct inf_wait wait
; /* What to return from target_wait. */
180 /* One thread proc in INF may be in `single-stepping mode'. This
182 struct proc
*step_thread
;
184 /* The thread we think is the signal thread. */
185 struct proc
*signal_thread
;
187 mach_port_t event_port
; /* Where we receive various msgs. */
189 /* True if we think at least one thread in the inferior could currently be
191 unsigned int running
:1;
193 /* True if the process has stopped (in the proc server sense). Note that
194 since a proc server `stop' leaves the signal thread running, the inf can
195 be RUNNING && STOPPED... */
196 unsigned int stopped
:1;
198 /* True if the inferior has no message port. */
199 unsigned int nomsg
:1;
201 /* True if the inferior is traced. */
202 unsigned int traced
:1;
204 /* True if we shouldn't try waiting for the inferior, usually because we
205 can't for some reason. */
206 unsigned int no_wait
:1;
208 /* When starting a new inferior, we don't try to validate threads until all
209 the proper execs have been done, which this flag states we still
211 unsigned int pending_execs
:1;
213 /* Fields describing global state. */
215 /* The task suspend count used when gdb has control. This is normally 1 to
216 make things easier for us, but sometimes (like when attaching to vital
217 system servers) it may be desirable to let the task continue to run
218 (pausing individual threads as necessary). */
221 /* The task suspend count left when detaching from a task. */
224 /* The initial values used for the run_sc and pause_sc of newly discovered
225 threads -- see the definition of those fields in struct proc. */
226 int default_thread_run_sc
;
227 int default_thread_pause_sc
;
228 int default_thread_detach_sc
;
230 /* True if the process should be traced when started/attached. Newly
231 started processes *must* be traced at first to exec them properly, but
232 if this is false, tracing is turned off as soon it has done so. */
235 /* True if exceptions from the inferior process should be trapped. This
236 must be on to use breakpoints. */
242 __proc_pid (struct proc
*proc
)
244 return proc
->inf
->pid
;
248 /* Update PROC's real suspend count to match it's desired one. Returns true
249 if we think PROC is now in a runnable state. */
251 proc_update_sc (struct proc
*proc
)
255 int delta
= proc
->sc
- proc
->cur_sc
;
258 proc_debug (proc
, "sc: %d --> %d", proc
->cur_sc
, proc
->sc
);
260 if (proc
->sc
== 0 && proc
->state_changed
)
261 /* Since PROC may start running, we must write back any state changes. */
263 gdb_assert (proc_is_thread (proc
));
264 proc_debug (proc
, "storing back changed thread state");
265 err
= thread_set_state (proc
->port
, THREAD_STATE_FLAVOR
,
266 (thread_state_t
) &proc
->state
, THREAD_STATE_SIZE
);
268 proc
->state_changed
= 0;
273 while (delta
-- > 0 && !err
)
275 if (proc_is_task (proc
))
276 err
= task_suspend (proc
->port
);
278 err
= thread_suspend (proc
->port
);
283 while (delta
++ < 0 && !err
)
285 if (proc_is_task (proc
))
286 err
= task_resume (proc
->port
);
288 err
= thread_resume (proc
->port
);
292 proc
->cur_sc
= proc
->sc
;
294 /* If we got an error, then the task/thread has disappeared. */
295 running
= !err
&& proc
->sc
== 0;
297 proc_debug (proc
, "is %s", err
? "dead" : running
? "running" : "suspended");
299 proc_debug (proc
, "err = %s", safe_strerror (err
));
304 proc
->state_valid
= proc
->state_changed
= 0;
305 proc
->fetched_regs
= 0;
312 /* Thread_abort is called on PROC if needed. PROC must be a thread proc.
313 If PROC is deemed `precious', then nothing is done unless FORCE is true.
314 In particular, a thread is precious if it's running (in which case forcing
315 it includes suspending it first), or if it has an exception pending. */
317 proc_abort (struct proc
*proc
, int force
)
319 gdb_assert (proc_is_thread (proc
));
323 struct inf
*inf
= proc
->inf
;
324 int running
= (proc
->cur_sc
== 0 && inf
->task
->cur_sc
== 0);
326 if (running
&& force
)
329 inf_update_suspends (proc
->inf
);
331 warning (_("Stopped %s."), proc_string (proc
));
333 else if (proc
== inf
->wait
.thread
&& inf
->wait
.exc
.reply
&& !force
)
334 /* An exception is pending on PROC, which don't mess with. */
338 /* We only abort the thread if it's not actually running. */
340 thread_abort (proc
->port
);
341 proc_debug (proc
, "aborted");
345 proc_debug (proc
, "not aborting");
349 /* Make sure that the state field in PROC is up to date, and return a pointer
350 to it, or 0 if something is wrong. If WILL_MODIFY is true, makes sure
351 that the thread is stopped and aborted first, and sets the state_changed
352 field in PROC to true. */
354 proc_get_state (struct proc
*proc
, int will_modify
)
356 int was_aborted
= proc
->aborted
;
358 proc_debug (proc
, "updating state info%s",
359 will_modify
? " (with intention to modify)" : "");
361 proc_abort (proc
, will_modify
);
363 if (!was_aborted
&& proc
->aborted
)
364 /* PROC's state may have changed since we last fetched it. */
365 proc
->state_valid
= 0;
367 if (!proc
->state_valid
)
369 mach_msg_type_number_t state_size
= THREAD_STATE_SIZE
;
371 thread_get_state (proc
->port
, THREAD_STATE_FLAVOR
,
372 (thread_state_t
) &proc
->state
, &state_size
);
374 proc_debug (proc
, "getting thread state");
375 proc
->state_valid
= !err
;
378 if (proc
->state_valid
)
381 proc
->state_changed
= 1;
382 return (thread_state_t
) &proc
->state
;
389 /* Set PORT to PROC's exception port. */
391 proc_get_exception_port (struct proc
* proc
, mach_port_t
* port
)
393 if (proc_is_task (proc
))
394 return task_get_exception_port (proc
->port
, port
);
396 return thread_get_exception_port (proc
->port
, port
);
399 /* Set PROC's exception port to PORT. */
401 proc_set_exception_port (struct proc
* proc
, mach_port_t port
)
403 proc_debug (proc
, "setting exception port: %lu", port
);
404 if (proc_is_task (proc
))
405 return task_set_exception_port (proc
->port
, port
);
407 return thread_set_exception_port (proc
->port
, port
);
410 /* Get PROC's exception port, cleaning up a bit if proc has died. */
412 _proc_get_exc_port (struct proc
*proc
)
414 mach_port_t exc_port
;
415 error_t err
= proc_get_exception_port (proc
, &exc_port
);
418 /* PROC must be dead. */
421 mach_port_deallocate (mach_task_self (), proc
->exc_port
);
422 proc
->exc_port
= MACH_PORT_NULL
;
423 if (proc
->saved_exc_port
)
424 mach_port_deallocate (mach_task_self (), proc
->saved_exc_port
);
425 proc
->saved_exc_port
= MACH_PORT_NULL
;
431 /* Replace PROC's exception port with EXC_PORT, unless it's already
432 been done. Stash away any existing exception port so we can
435 proc_steal_exc_port (struct proc
*proc
, mach_port_t exc_port
)
437 mach_port_t cur_exc_port
= _proc_get_exc_port (proc
);
443 proc_debug (proc
, "inserting exception port: %lu", exc_port
);
445 if (cur_exc_port
!= exc_port
)
446 /* Put in our exception port. */
447 err
= proc_set_exception_port (proc
, exc_port
);
449 if (err
|| cur_exc_port
== proc
->exc_port
)
450 /* We previously set the exception port, and it's still set. So we
451 just keep the old saved port which is what the proc set. */
454 mach_port_deallocate (mach_task_self (), cur_exc_port
);
457 /* Keep a copy of PROC's old exception port so it can be restored. */
459 if (proc
->saved_exc_port
)
460 mach_port_deallocate (mach_task_self (), proc
->saved_exc_port
);
461 proc
->saved_exc_port
= cur_exc_port
;
464 proc_debug (proc
, "saved exception port: %lu", proc
->saved_exc_port
);
467 proc
->exc_port
= exc_port
;
469 warning (_("Error setting exception port for %s: %s"),
470 proc_string (proc
), safe_strerror (err
));
474 /* If we previously replaced PROC's exception port, put back what we
475 found there at the time, unless *our* exception port has since been
476 overwritten, in which case who knows what's going on. */
478 proc_restore_exc_port (struct proc
*proc
)
480 mach_port_t cur_exc_port
= _proc_get_exc_port (proc
);
486 proc_debug (proc
, "restoring real exception port");
488 if (proc
->exc_port
== cur_exc_port
)
489 /* Our's is still there. */
490 err
= proc_set_exception_port (proc
, proc
->saved_exc_port
);
492 if (proc
->saved_exc_port
)
493 mach_port_deallocate (mach_task_self (), proc
->saved_exc_port
);
494 proc
->saved_exc_port
= MACH_PORT_NULL
;
497 proc
->exc_port
= MACH_PORT_NULL
;
499 warning (_("Error setting exception port for %s: %s"),
500 proc_string (proc
), safe_strerror (err
));
505 /* Turns hardware tracing in PROC on or off when SET is true or false,
506 respectively. Returns true on success. */
508 proc_trace (struct proc
*proc
, int set
)
510 thread_state_t state
= proc_get_state (proc
, 1);
513 return 0; /* The thread must be dead. */
515 proc_debug (proc
, "tracing %s", set
? "on" : "off");
519 /* XXX We don't get the exception unless the thread has its own
520 exception port???? */
521 if (proc
->exc_port
== MACH_PORT_NULL
)
522 proc_steal_exc_port (proc
, proc
->inf
->event_port
);
523 THREAD_STATE_SET_TRACED (state
);
526 THREAD_STATE_CLEAR_TRACED (state
);
532 /* A variable from which to assign new TIDs. */
533 static int next_thread_id
= 1;
535 /* Returns a new proc structure with the given fields. Also adds a
536 notification for PORT becoming dead to be sent to INF's notify port. */
538 make_proc (struct inf
*inf
, mach_port_t port
, int tid
)
541 mach_port_t prev_port
= MACH_PORT_NULL
;
542 struct proc
*proc
= xmalloc (sizeof (struct proc
));
548 proc
->saved_exc_port
= MACH_PORT_NULL
;
549 proc
->exc_port
= MACH_PORT_NULL
;
554 /* Note that these are all the values for threads; the task simply uses the
555 corresponding field in INF directly. */
556 proc
->run_sc
= inf
->default_thread_run_sc
;
557 proc
->pause_sc
= inf
->default_thread_pause_sc
;
558 proc
->detach_sc
= inf
->default_thread_detach_sc
;
559 proc
->resume_sc
= proc
->run_sc
;
563 proc
->state_valid
= 0;
564 proc
->state_changed
= 0;
566 proc_debug (proc
, "is new");
568 /* Get notified when things die. */
570 mach_port_request_notification (mach_task_self (), port
,
571 MACH_NOTIFY_DEAD_NAME
, 1,
573 MACH_MSG_TYPE_MAKE_SEND_ONCE
,
576 warning (_("Couldn't request notification for port %lu: %s"),
577 port
, safe_strerror (err
));
580 proc_debug (proc
, "notifications to: %lu", inf
->event_port
);
581 if (prev_port
!= MACH_PORT_NULL
)
582 mach_port_deallocate (mach_task_self (), prev_port
);
585 if (inf
->want_exceptions
)
587 if (proc_is_task (proc
))
588 /* Make the task exception port point to us. */
589 proc_steal_exc_port (proc
, inf
->event_port
);
591 /* Just clear thread exception ports -- they default to the
593 proc_steal_exc_port (proc
, MACH_PORT_NULL
);
599 /* Frees PROC and any resources it uses, and returns the value of PROC's
602 _proc_free (struct proc
*proc
)
604 struct inf
*inf
= proc
->inf
;
605 struct proc
*next
= proc
->next
;
607 proc_debug (proc
, "freeing...");
609 if (proc
== inf
->step_thread
)
610 /* Turn off single stepping. */
611 inf_set_step_thread (inf
, 0);
612 if (proc
== inf
->wait
.thread
)
613 inf_clear_wait (inf
);
614 if (proc
== inf
->signal_thread
)
615 inf
->signal_thread
= 0;
617 if (proc
->port
!= MACH_PORT_NULL
)
619 if (proc
->exc_port
!= MACH_PORT_NULL
)
620 /* Restore the original exception port. */
621 proc_restore_exc_port (proc
);
622 if (proc
->cur_sc
!= 0)
623 /* Resume the thread/task. */
626 proc_update_sc (proc
);
628 mach_port_deallocate (mach_task_self (), proc
->port
);
639 struct inf
*inf
= xmalloc (sizeof (struct inf
));
643 inf
->threads_up_to_date
= 0;
645 inf
->wait
.status
.kind
= TARGET_WAITKIND_SPURIOUS
;
646 inf
->wait
.thread
= 0;
647 inf
->wait
.exc
.handler
= MACH_PORT_NULL
;
648 inf
->wait
.exc
.reply
= MACH_PORT_NULL
;
649 inf
->step_thread
= 0;
650 inf
->signal_thread
= 0;
651 inf
->event_port
= MACH_PORT_NULL
;
657 inf
->pending_execs
= 0;
660 inf
->default_thread_run_sc
= 0;
661 inf
->default_thread_pause_sc
= 0;
662 inf
->default_thread_detach_sc
= 0;
663 inf
->want_signals
= 1; /* By default */
664 inf
->want_exceptions
= 1; /* By default */
669 /* Clear INF's target wait status. */
671 inf_clear_wait (struct inf
*inf
)
673 inf_debug (inf
, "clearing wait");
674 inf
->wait
.status
.kind
= TARGET_WAITKIND_SPURIOUS
;
675 inf
->wait
.thread
= 0;
676 inf
->wait
.suppress
= 0;
677 if (inf
->wait
.exc
.handler
!= MACH_PORT_NULL
)
679 mach_port_deallocate (mach_task_self (), inf
->wait
.exc
.handler
);
680 inf
->wait
.exc
.handler
= MACH_PORT_NULL
;
682 if (inf
->wait
.exc
.reply
!= MACH_PORT_NULL
)
684 mach_port_deallocate (mach_task_self (), inf
->wait
.exc
.reply
);
685 inf
->wait
.exc
.reply
= MACH_PORT_NULL
;
691 inf_cleanup (struct inf
*inf
)
693 inf_debug (inf
, "cleanup");
695 inf_clear_wait (inf
);
697 inf_set_pid (inf
, -1);
704 inf
->pending_execs
= 0;
708 mach_port_destroy (mach_task_self (), inf
->event_port
);
709 inf
->event_port
= MACH_PORT_NULL
;
714 inf_startup (struct inf
*inf
, int pid
)
718 inf_debug (inf
, "startup: pid = %d", pid
);
722 /* Make the port on which we receive all events. */
723 err
= mach_port_allocate (mach_task_self (),
724 MACH_PORT_RIGHT_RECEIVE
, &inf
->event_port
);
726 error (_("Error allocating event port: %s"), safe_strerror (err
));
728 /* Make a send right for it, so we can easily copy it for other people. */
729 mach_port_insert_right (mach_task_self (), inf
->event_port
,
730 inf
->event_port
, MACH_MSG_TYPE_MAKE_SEND
);
731 inf_set_pid (inf
, pid
);
735 /* Close current process, if any, and attach INF to process PORT. */
737 inf_set_pid (struct inf
*inf
, pid_t pid
)
740 struct proc
*task
= inf
->task
;
742 inf_debug (inf
, "setting pid: %d", pid
);
745 task_port
= MACH_PORT_NULL
;
748 error_t err
= proc_pid2task (proc_server
, pid
, &task_port
);
751 error (_("Error getting task for pid %d: %s"),
752 pid
, safe_strerror (err
));
755 inf_debug (inf
, "setting task: %lu", task_port
);
758 task_suspend (task_port
);
760 if (task
&& task
->port
!= task_port
)
763 inf_validate_procs (inf
); /* Trash all the threads. */
764 _proc_free (task
); /* And the task. */
767 if (task_port
!= MACH_PORT_NULL
)
769 inf
->task
= make_proc (inf
, task_port
, PROC_TID_TASK
);
770 inf
->threads_up_to_date
= 0;
777 /* Reflect task_suspend above. */
778 inf
->task
->sc
= inf
->task
->cur_sc
= 1;
785 /* Validates INF's stopped, nomsg and traced field from the actual
786 proc server state. Note that the traced field is only updated from
787 the proc server state if we do not have a message port. If we do
788 have a message port we'd better look at the tracemask itself. */
790 inf_validate_procinfo (struct inf
*inf
)
793 mach_msg_type_number_t noise_len
= 0;
795 mach_msg_type_number_t pi_len
= 0;
798 proc_getprocinfo (proc_server
, inf
->pid
, &info_flags
,
799 (procinfo_t
*) &pi
, &pi_len
, &noise
, &noise_len
);
803 inf
->stopped
= !!(pi
->state
& PI_STOPPED
);
804 inf
->nomsg
= !!(pi
->state
& PI_NOMSG
);
806 inf
->traced
= !!(pi
->state
& PI_TRACED
);
807 vm_deallocate (mach_task_self (), (vm_address_t
) pi
, pi_len
);
809 vm_deallocate (mach_task_self (), (vm_address_t
) noise
, noise_len
);
813 /* Validates INF's task suspend count. If it's higher than we expect,
814 verify with the user before `stealing' the extra count. */
816 inf_validate_task_sc (struct inf
*inf
)
819 mach_msg_type_number_t noise_len
= 0;
821 mach_msg_type_number_t pi_len
= 0;
822 int info_flags
= PI_FETCH_TASKINFO
;
823 int suspend_count
= -1;
827 err
= proc_getprocinfo (proc_server
, inf
->pid
, &info_flags
,
828 (procinfo_t
*) &pi
, &pi_len
, &noise
, &noise_len
);
831 inf
->task
->dead
= 1; /* oh well */
835 if (inf
->task
->cur_sc
< pi
->taskinfo
.suspend_count
&& suspend_count
== -1)
837 /* The proc server might have suspended the task while stopping
838 it. This happens when the task is handling a traced signal.
839 Refetch the suspend count. The proc server should be
840 finished stopping the task by now. */
841 suspend_count
= pi
->taskinfo
.suspend_count
;
845 suspend_count
= pi
->taskinfo
.suspend_count
;
847 vm_deallocate (mach_task_self (), (vm_address_t
) pi
, pi_len
);
849 vm_deallocate (mach_task_self (), (vm_address_t
) pi
, pi_len
);
851 if (inf
->task
->cur_sc
< suspend_count
)
855 target_terminal_ours (); /* Allow I/O. */
856 abort
= !query (_("Pid %d has an additional task suspend count of %d;"
857 " clear it? "), inf
->pid
,
858 suspend_count
- inf
->task
->cur_sc
);
859 target_terminal_inferior (); /* Give it back to the child. */
862 error (_("Additional task suspend count left untouched."));
864 inf
->task
->cur_sc
= suspend_count
;
868 /* Turns tracing for INF on or off, depending on ON, unless it already
869 is. If INF is running, the resume_sc count of INF's threads will
870 be modified, and the signal thread will briefly be run to change
873 inf_set_traced (struct inf
*inf
, int on
)
875 if (on
== inf
->traced
)
878 if (inf
->task
&& !inf
->task
->dead
)
879 /* Make it take effect immediately. */
881 sigset_t mask
= on
? ~(sigset_t
) 0 : 0;
883 INF_RESUME_MSGPORT_RPC (inf
, msg_set_init_int (msgport
, refport
,
884 INIT_TRACEMASK
, mask
));
889 warning (_("Can't modify tracing state for pid %d: %s"),
890 inf
->pid
, "No signal thread");
894 warning (_("Can't modify tracing state for pid %d: %s"),
895 inf
->pid
, safe_strerror (err
));
904 /* Makes all the real suspend count deltas of all the procs in INF
905 match the desired values. Careful to always do thread/task suspend
906 counts in the safe order. Returns true if at least one thread is
907 thought to be running. */
909 inf_update_suspends (struct inf
*inf
)
911 struct proc
*task
= inf
->task
;
913 /* We don't have to update INF->threads even though we're iterating over it
914 because we'll change a thread only if it already has an existing proc
916 inf_debug (inf
, "updating suspend counts");
921 int task_running
= (task
->sc
== 0), thread_running
= 0;
923 if (task
->sc
> task
->cur_sc
)
924 /* The task is becoming _more_ suspended; do before any threads. */
925 task_running
= proc_update_sc (task
);
927 if (inf
->pending_execs
)
928 /* When we're waiting for an exec, things may be happening behind our
929 back, so be conservative. */
932 /* Do all the thread suspend counts. */
933 for (thread
= inf
->threads
; thread
; thread
= thread
->next
)
934 thread_running
|= proc_update_sc (thread
);
936 if (task
->sc
!= task
->cur_sc
)
937 /* We didn't do the task first, because we wanted to wait for the
938 threads; do it now. */
939 task_running
= proc_update_sc (task
);
941 inf_debug (inf
, "%srunning...",
942 (thread_running
&& task_running
) ? "" : "not ");
944 inf
->running
= thread_running
&& task_running
;
946 /* Once any thread has executed some code, we can't depend on the
947 threads list any more. */
949 inf
->threads_up_to_date
= 0;
958 /* Converts a GDB pid to a struct proc. */
960 inf_tid_to_thread (struct inf
*inf
, int tid
)
962 struct proc
*thread
= inf
->threads
;
965 if (thread
->tid
== tid
)
968 thread
= thread
->next
;
972 /* Converts a thread port to a struct proc. */
974 inf_port_to_thread (struct inf
*inf
, mach_port_t port
)
976 struct proc
*thread
= inf
->threads
;
979 if (thread
->port
== port
)
982 thread
= thread
->next
;
987 /* Make INF's list of threads be consistent with reality of TASK. */
989 inf_validate_procs (struct inf
*inf
)
991 thread_array_t threads
;
992 mach_msg_type_number_t num_threads
, i
;
993 struct proc
*task
= inf
->task
;
995 /* If no threads are currently running, this function will guarantee that
996 things are up to date. The exception is if there are zero threads --
997 then it is almost certainly in an odd state, and probably some outside
998 agent will create threads. */
999 inf
->threads_up_to_date
= inf
->threads
? !inf
->running
: 0;
1003 error_t err
= task_threads (task
->port
, &threads
, &num_threads
);
1005 inf_debug (inf
, "fetching threads");
1007 /* TASK must be dead. */
1017 inf_debug (inf
, "no task");
1021 /* Make things normally linear. */
1022 mach_msg_type_number_t search_start
= 0;
1023 /* Which thread in PROCS corresponds to each task thread, & the task. */
1024 struct proc
*matched
[num_threads
+ 1];
1025 /* The last thread in INF->threads, so we can add to the end. */
1026 struct proc
*last
= 0;
1027 /* The current thread we're considering. */
1028 struct proc
*thread
= inf
->threads
;
1030 memset (matched
, 0, sizeof (matched
));
1034 mach_msg_type_number_t left
;
1036 for (i
= search_start
, left
= num_threads
; left
; i
++, left
--)
1038 if (i
>= num_threads
)
1039 i
-= num_threads
; /* I wrapped around. */
1040 if (thread
->port
== threads
[i
])
1041 /* We already know about this thread. */
1043 matched
[i
] = thread
;
1045 thread
= thread
->next
;
1053 proc_debug (thread
, "died!");
1054 thread
->port
= MACH_PORT_NULL
;
1055 thread
= _proc_free (thread
); /* THREAD is dead. */
1057 last
->next
= thread
;
1059 inf
->threads
= thread
;
1063 for (i
= 0; i
< num_threads
; i
++)
1066 /* Throw away the duplicate send right. */
1067 mach_port_deallocate (mach_task_self (), threads
[i
]);
1069 /* THREADS[I] is a thread we don't know about yet! */
1073 thread
= make_proc (inf
, threads
[i
], next_thread_id
++);
1075 last
->next
= thread
;
1077 inf
->threads
= thread
;
1079 proc_debug (thread
, "new thread: %lu", threads
[i
]);
1081 ptid
= ptid_build (inf
->pid
, thread
->tid
, 0);
1083 /* Tell GDB's generic thread code. */
1085 if (ptid_equal (inferior_ptid
, pid_to_ptid (inf
->pid
)))
1086 /* This is the first time we're hearing about thread
1087 ids, after a fork-child. */
1088 thread_change_ptid (inferior_ptid
, ptid
);
1089 else if (inf
->pending_execs
!= 0)
1090 /* This is a shell thread. */
1091 add_thread_silent (ptid
);
1097 vm_deallocate (mach_task_self (),
1098 (vm_address_t
) threads
, (num_threads
* sizeof (thread_t
)));
1103 /* Makes sure that INF's thread list is synced with the actual process. */
1105 inf_update_procs (struct inf
*inf
)
1109 if (!inf
->threads_up_to_date
)
1110 inf_validate_procs (inf
);
1114 /* Sets the resume_sc of each thread in inf. That of RUN_THREAD is set to 0,
1115 and others are set to their run_sc if RUN_OTHERS is true, and otherwise
1118 inf_set_threads_resume_sc (struct inf
*inf
,
1119 struct proc
*run_thread
, int run_others
)
1121 struct proc
*thread
;
1123 inf_update_procs (inf
);
1124 for (thread
= inf
->threads
; thread
; thread
= thread
->next
)
1125 if (thread
== run_thread
)
1126 thread
->resume_sc
= 0;
1127 else if (run_others
)
1128 thread
->resume_sc
= thread
->run_sc
;
1130 thread
->resume_sc
= thread
->pause_sc
;
1134 /* Cause INF to continue execution immediately; individual threads may still
1135 be suspended (but their suspend counts will be updated). */
1137 inf_resume (struct inf
*inf
)
1139 struct proc
*thread
;
1141 inf_update_procs (inf
);
1143 for (thread
= inf
->threads
; thread
; thread
= thread
->next
)
1144 thread
->sc
= thread
->resume_sc
;
1148 if (!inf
->pending_execs
)
1149 /* Try to make sure our task count is correct -- in the case where
1150 we're waiting for an exec though, things are too volatile, so just
1151 assume things will be reasonable (which they usually will be). */
1152 inf_validate_task_sc (inf
);
1156 inf_update_suspends (inf
);
1159 /* Cause INF to stop execution immediately; individual threads may still
1162 inf_suspend (struct inf
*inf
)
1164 struct proc
*thread
;
1166 inf_update_procs (inf
);
1168 for (thread
= inf
->threads
; thread
; thread
= thread
->next
)
1169 thread
->sc
= thread
->pause_sc
;
1172 inf
->task
->sc
= inf
->pause_sc
;
1174 inf_update_suspends (inf
);
1178 /* INF has one thread PROC that is in single-stepping mode. This
1179 function changes it to be PROC, changing any old step_thread to be
1180 a normal one. A PROC of 0 clears any existing value. */
1182 inf_set_step_thread (struct inf
*inf
, struct proc
*thread
)
1184 gdb_assert (!thread
|| proc_is_thread (thread
));
1187 inf_debug (inf
, "setting step thread: %d/%d", inf
->pid
, thread
->tid
);
1189 inf_debug (inf
, "clearing step thread");
1191 if (inf
->step_thread
!= thread
)
1193 if (inf
->step_thread
&& inf
->step_thread
->port
!= MACH_PORT_NULL
)
1194 if (!proc_trace (inf
->step_thread
, 0))
1196 if (thread
&& proc_trace (thread
, 1))
1197 inf
->step_thread
= thread
;
1199 inf
->step_thread
= 0;
1204 /* Set up the thread resume_sc's so that only the signal thread is running
1205 (plus whatever other thread are set to always run). Returns true if we
1206 did so, or false if we can't find a signal thread. */
1208 inf_set_threads_resume_sc_for_signal_thread (struct inf
*inf
)
1210 if (inf
->signal_thread
)
1212 inf_set_threads_resume_sc (inf
, inf
->signal_thread
, 0);
1220 inf_update_signal_thread (struct inf
*inf
)
1222 /* XXX for now we assume that if there's a msgport, the 2nd thread is
1223 the signal thread. */
1224 inf
->signal_thread
= inf
->threads
? inf
->threads
->next
: 0;
1228 /* Detachs from INF's inferior task, letting it run once again... */
1230 inf_detach (struct inf
*inf
)
1232 struct proc
*task
= inf
->task
;
1234 inf_debug (inf
, "detaching...");
1236 inf_clear_wait (inf
);
1237 inf_set_step_thread (inf
, 0);
1241 struct proc
*thread
;
1243 inf_validate_procinfo (inf
);
1245 inf_set_traced (inf
, 0);
1251 inf_signal (inf
, GDB_SIGNAL_0
);
1254 proc_restore_exc_port (task
);
1255 task
->sc
= inf
->detach_sc
;
1257 for (thread
= inf
->threads
; thread
; thread
= thread
->next
)
1259 proc_restore_exc_port (thread
);
1260 thread
->sc
= thread
->detach_sc
;
1263 inf_update_suspends (inf
);
1269 /* Attaches INF to the process with process id PID, returning it in a
1270 suspended state suitable for debugging. */
1272 inf_attach (struct inf
*inf
, int pid
)
1274 inf_debug (inf
, "attaching: %d", pid
);
1279 inf_startup (inf
, pid
);
1283 /* Makes sure that we've got our exception ports entrenched in the process. */
1285 inf_steal_exc_ports (struct inf
*inf
)
1287 struct proc
*thread
;
1289 inf_debug (inf
, "stealing exception ports");
1291 inf_set_step_thread (inf
, 0); /* The step thread is special. */
1293 proc_steal_exc_port (inf
->task
, inf
->event_port
);
1294 for (thread
= inf
->threads
; thread
; thread
= thread
->next
)
1295 proc_steal_exc_port (thread
, MACH_PORT_NULL
);
1298 /* Makes sure the process has its own exception ports. */
1300 inf_restore_exc_ports (struct inf
*inf
)
1302 struct proc
*thread
;
1304 inf_debug (inf
, "restoring exception ports");
1306 inf_set_step_thread (inf
, 0); /* The step thread is special. */
1308 proc_restore_exc_port (inf
->task
);
1309 for (thread
= inf
->threads
; thread
; thread
= thread
->next
)
1310 proc_restore_exc_port (thread
);
1314 /* Deliver signal SIG to INF. If INF is stopped, delivering a signal, even
1315 signal 0, will continue it. INF is assumed to be in a paused state, and
1316 the resume_sc's of INF's threads may be affected. */
1318 inf_signal (struct inf
*inf
, enum gdb_signal sig
)
1321 int host_sig
= gdb_signal_to_host (sig
);
1323 #define NAME gdb_signal_to_name (sig)
1325 if (host_sig
>= _NSIG
)
1326 /* A mach exception. Exceptions are encoded in the signal space by
1327 putting them after _NSIG; this assumes they're positive (and not
1328 extremely large)! */
1330 struct inf_wait
*w
= &inf
->wait
;
1332 if (w
->status
.kind
== TARGET_WAITKIND_STOPPED
1333 && w
->status
.value
.sig
== sig
1334 && w
->thread
&& !w
->thread
->aborted
)
1335 /* We're passing through the last exception we received. This is
1336 kind of bogus, because exceptions are per-thread whereas gdb
1337 treats signals as per-process. We just forward the exception to
1338 the correct handler, even it's not for the same thread as TID --
1339 i.e., we pretend it's global. */
1341 struct exc_state
*e
= &w
->exc
;
1343 inf_debug (inf
, "passing through exception:"
1344 " task = %lu, thread = %lu, exc = %d"
1345 ", code = %d, subcode = %d",
1346 w
->thread
->port
, inf
->task
->port
,
1347 e
->exception
, e
->code
, e
->subcode
);
1349 exception_raise_request (e
->handler
,
1350 e
->reply
, MACH_MSG_TYPE_MOVE_SEND_ONCE
,
1351 w
->thread
->port
, inf
->task
->port
,
1352 e
->exception
, e
->code
, e
->subcode
);
1355 error (_("Can't forward spontaneous exception (%s)."), NAME
);
1358 /* A Unix signal. */
1360 /* The process is stopped and expecting a signal. Just send off a
1361 request and let it get handled when we resume everything. */
1363 inf_debug (inf
, "sending %s to stopped process", NAME
);
1365 INF_MSGPORT_RPC (inf
,
1366 msg_sig_post_untraced_request (msgport
,
1368 MACH_MSG_TYPE_MAKE_SEND_ONCE
,
1372 /* Posting an untraced signal automatically continues it.
1373 We clear this here rather than when we get the reply
1374 because we'd rather assume it's not stopped when it
1375 actually is, than the reverse. */
1379 /* It's not expecting it. We have to let just the signal thread
1380 run, and wait for it to get into a reasonable state before we
1381 can continue the rest of the process. When we finally resume the
1382 process the signal we request will be the very first thing that
1385 inf_debug (inf
, "sending %s to unstopped process"
1386 " (so resuming signal thread)", NAME
);
1388 INF_RESUME_MSGPORT_RPC (inf
,
1389 msg_sig_post_untraced (msgport
, host_sig
,
1394 /* Can't do too much... */
1395 warning (_("Can't deliver signal %s: No signal thread."), NAME
);
1397 warning (_("Delivering signal %s: %s"), NAME
, safe_strerror (err
));
1403 /* Continue INF without delivering a signal. This is meant to be used
1404 when INF does not have a message port. */
1406 inf_continue (struct inf
*inf
)
1409 error_t err
= proc_pid2proc (proc_server
, inf
->pid
, &proc
);
1413 inf_debug (inf
, "continuing process");
1415 err
= proc_mark_cont (proc
);
1418 struct proc
*thread
;
1420 for (thread
= inf
->threads
; thread
; thread
= thread
->next
)
1421 thread_resume (thread
->port
);
1428 warning (_("Can't continue process: %s"), safe_strerror (err
));
1432 /* The inferior used for all gdb target ops. */
1433 struct inf
*gnu_current_inf
= 0;
1435 /* The inferior being waited for by gnu_wait. Since GDB is decidely not
1436 multi-threaded, we don't bother to lock this. */
1437 struct inf
*waiting_inf
;
1439 /* Wait for something to happen in the inferior, returning what in STATUS. */
1441 gnu_wait (struct target_ops
*ops
,
1442 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
1446 mach_msg_header_t hdr
;
1447 mach_msg_type_t type
;
1451 struct proc
*thread
;
1452 struct inf
*inf
= gnu_current_inf
;
1454 extern int exc_server (mach_msg_header_t
*, mach_msg_header_t
*);
1455 extern int msg_reply_server (mach_msg_header_t
*, mach_msg_header_t
*);
1456 extern int notify_server (mach_msg_header_t
*, mach_msg_header_t
*);
1457 extern int process_reply_server (mach_msg_header_t
*, mach_msg_header_t
*);
1459 gdb_assert (inf
->task
);
1461 if (!inf
->threads
&& !inf
->pending_execs
)
1462 /* No threads! Assume that maybe some outside agency is frobbing our
1463 task, and really look for new threads. If we can't find any, just tell
1464 the user to try again later. */
1466 inf_validate_procs (inf
);
1467 if (!inf
->threads
&& !inf
->task
->dead
)
1468 error (_("There are no threads; try again later."));
1473 inf_debug (inf
, "waiting for: %s", target_pid_to_str (ptid
));
1476 if (proc_wait_pid
!= inf
->pid
&& !inf
->no_wait
)
1477 /* Always get information on events from the proc server. */
1479 inf_debug (inf
, "requesting wait on pid %d", inf
->pid
);
1482 /* The proc server is single-threaded, and only allows a single
1483 outstanding wait request, so we have to cancel the previous one. */
1485 inf_debug (inf
, "cancelling previous wait on pid %d", proc_wait_pid
);
1486 interrupt_operation (proc_server
, 0);
1490 proc_wait_request (proc_server
, inf
->event_port
, inf
->pid
, WUNTRACED
);
1492 warning (_("wait request failed: %s"), safe_strerror (err
));
1495 inf_debug (inf
, "waits pending: %d", proc_waits_pending
);
1496 proc_wait_pid
= inf
->pid
;
1497 /* Even if proc_waits_pending was > 0 before, we still won't
1498 get any other replies, because it was either from a
1499 different INF, or a different process attached to INF --
1500 and the event port, which is the wait reply port, changes
1501 when you switch processes. */
1502 proc_waits_pending
= 1;
1506 inf_clear_wait (inf
);
1508 /* What can happen? (1) Dead name notification; (2) Exceptions arrive;
1509 (3) wait reply from the proc server. */
1511 inf_debug (inf
, "waiting for an event...");
1512 err
= mach_msg (&msg
.hdr
, MACH_RCV_MSG
| MACH_RCV_INTERRUPT
,
1513 0, sizeof (struct msg
), inf
->event_port
,
1514 MACH_MSG_TIMEOUT_NONE
, MACH_PORT_NULL
);
1516 /* Re-suspend the task. */
1519 if (!inf
->task
&& inf
->pending_execs
)
1520 /* When doing an exec, it's possible that the old task wasn't reused
1521 (e.g., setuid execs). So if the task seems to have disappeared,
1522 attempt to refetch it, as the pid should still be the same. */
1523 inf_set_pid (inf
, inf
->pid
);
1525 if (err
== EMACH_RCV_INTERRUPTED
)
1526 inf_debug (inf
, "interrupted");
1528 error (_("Couldn't wait for an event: %s"), safe_strerror (err
));
1533 mach_msg_header_t hdr
;
1534 mach_msg_type_t err_type
;
1540 inf_debug (inf
, "event: msgid = %d", msg
.hdr
.msgh_id
);
1542 /* Handle what we got. */
1543 if (!notify_server (&msg
.hdr
, &reply
.hdr
)
1544 && !exc_server (&msg
.hdr
, &reply
.hdr
)
1545 && !process_reply_server (&msg
.hdr
, &reply
.hdr
)
1546 && !msg_reply_server (&msg
.hdr
, &reply
.hdr
))
1547 /* Whatever it is, it's something strange. */
1548 error (_("Got a strange event, msg id = %d."), msg
.hdr
.msgh_id
);
1551 error (_("Handling event, msgid = %d: %s"),
1552 msg
.hdr
.msgh_id
, safe_strerror (reply
.err
));
1555 if (inf
->pending_execs
)
1556 /* We're waiting for the inferior to finish execing. */
1558 struct inf_wait
*w
= &inf
->wait
;
1559 enum target_waitkind kind
= w
->status
.kind
;
1561 if (kind
== TARGET_WAITKIND_SPURIOUS
)
1562 /* Since gdb is actually counting the number of times the inferior
1563 stops, expecting one stop per exec, we only return major events
1567 inf_debug (inf
, "pending_execs, ignoring minor event");
1569 else if (kind
== TARGET_WAITKIND_STOPPED
1570 && w
->status
.value
.sig
== GDB_SIGNAL_TRAP
)
1571 /* Ah hah! A SIGTRAP from the inferior while starting up probably
1572 means we've succesfully completed an exec! */
1574 inf_debug (inf
, "one pending exec completed");
1576 else if (kind
== TARGET_WAITKIND_STOPPED
)
1577 /* It's possible that this signal is because of a crashed process
1578 being handled by the hurd crash server; in this case, the process
1579 will have an extra task suspend, which we need to know about.
1580 Since the code in inf_resume that normally checks for this is
1581 disabled while INF->pending_execs, we do the check here instead. */
1582 inf_validate_task_sc (inf
);
1585 if (inf
->wait
.suppress
)
1586 /* Some totally spurious event happened that we don't consider
1587 worth returning to gdb. Just keep waiting. */
1589 inf_debug (inf
, "suppressing return, rewaiting...");
1594 /* Pass back out our results. */
1595 memcpy (status
, &inf
->wait
.status
, sizeof (*status
));
1597 thread
= inf
->wait
.thread
;
1599 ptid
= ptid_build (inf
->pid
, thread
->tid
, 0);
1600 else if (ptid_equal (ptid
, minus_one_ptid
))
1601 thread
= inf_tid_to_thread (inf
, -1);
1603 thread
= inf_tid_to_thread (inf
, ptid_get_lwp (ptid
));
1605 if (!thread
|| thread
->port
== MACH_PORT_NULL
)
1607 /* TID is dead; try and find a new thread. */
1608 if (inf_update_procs (inf
) && inf
->threads
)
1609 ptid
= ptid_build (inf
->pid
, inf
->threads
->tid
, 0); /* The first
1613 ptid
= inferior_ptid
; /* let wait_for_inferior handle exit case */
1617 && !ptid_equal (ptid
, minus_one_ptid
)
1618 && status
->kind
!= TARGET_WAITKIND_SPURIOUS
1619 && inf
->pause_sc
== 0 && thread
->pause_sc
== 0)
1620 /* If something actually happened to THREAD, make sure we
1624 inf_update_suspends (inf
);
1627 inf_debug (inf
, "returning ptid = %s, status = %s (%d)",
1628 target_pid_to_str (ptid
),
1629 status
->kind
== TARGET_WAITKIND_EXITED
? "EXITED"
1630 : status
->kind
== TARGET_WAITKIND_STOPPED
? "STOPPED"
1631 : status
->kind
== TARGET_WAITKIND_SIGNALLED
? "SIGNALLED"
1632 : status
->kind
== TARGET_WAITKIND_LOADED
? "LOADED"
1633 : status
->kind
== TARGET_WAITKIND_SPURIOUS
? "SPURIOUS"
1635 status
->value
.integer
);
1641 /* The rpc handler called by exc_server. */
1643 S_exception_raise_request (mach_port_t port
, mach_port_t reply_port
,
1644 thread_t thread_port
, task_t task_port
,
1645 int exception
, int code
, int subcode
)
1647 struct inf
*inf
= waiting_inf
;
1648 struct proc
*thread
= inf_port_to_thread (inf
, thread_port
);
1650 inf_debug (waiting_inf
,
1651 "thread = %lu, task = %lu, exc = %d, code = %d, subcode = %d",
1652 thread_port
, task_port
, exception
, code
, subcode
);
1655 /* We don't know about thread? */
1657 inf_update_procs (inf
);
1658 thread
= inf_port_to_thread (inf
, thread_port
);
1660 /* Give up, the generating thread is gone. */
1664 mach_port_deallocate (mach_task_self (), thread_port
);
1665 mach_port_deallocate (mach_task_self (), task_port
);
1667 if (!thread
->aborted
)
1668 /* THREAD hasn't been aborted since this exception happened (abortion
1669 clears any exception state), so it must be real. */
1671 /* Store away the details; this will destroy any previous info. */
1672 inf
->wait
.thread
= thread
;
1674 inf
->wait
.status
.kind
= TARGET_WAITKIND_STOPPED
;
1676 if (exception
== EXC_BREAKPOINT
)
1677 /* GDB likes to get SIGTRAP for breakpoints. */
1679 inf
->wait
.status
.value
.sig
= GDB_SIGNAL_TRAP
;
1680 mach_port_deallocate (mach_task_self (), reply_port
);
1683 /* Record the exception so that we can forward it later. */
1685 if (thread
->exc_port
== port
)
1687 inf_debug (waiting_inf
, "Handler is thread exception port <%lu>",
1688 thread
->saved_exc_port
);
1689 inf
->wait
.exc
.handler
= thread
->saved_exc_port
;
1693 inf_debug (waiting_inf
, "Handler is task exception port <%lu>",
1694 inf
->task
->saved_exc_port
);
1695 inf
->wait
.exc
.handler
= inf
->task
->saved_exc_port
;
1696 gdb_assert (inf
->task
->exc_port
== port
);
1698 if (inf
->wait
.exc
.handler
!= MACH_PORT_NULL
)
1699 /* Add a reference to the exception handler. */
1700 mach_port_mod_refs (mach_task_self (),
1701 inf
->wait
.exc
.handler
, MACH_PORT_RIGHT_SEND
,
1704 inf
->wait
.exc
.exception
= exception
;
1705 inf
->wait
.exc
.code
= code
;
1706 inf
->wait
.exc
.subcode
= subcode
;
1707 inf
->wait
.exc
.reply
= reply_port
;
1709 /* Exceptions are encoded in the signal space by putting
1710 them after _NSIG; this assumes they're positive (and not
1711 extremely large)! */
1712 inf
->wait
.status
.value
.sig
=
1713 gdb_signal_from_host (_NSIG
+ exception
);
1717 /* A supppressed exception, which ignore. */
1719 inf
->wait
.suppress
= 1;
1720 mach_port_deallocate (mach_task_self (), reply_port
);
1727 /* Fill in INF's wait field after a task has died without giving us more
1728 detailed information. */
1730 inf_task_died_status (struct inf
*inf
)
1732 warning (_("Pid %d died with unknown exit status, using SIGKILL."),
1734 inf
->wait
.status
.kind
= TARGET_WAITKIND_SIGNALLED
;
1735 inf
->wait
.status
.value
.sig
= GDB_SIGNAL_KILL
;
1738 /* Notify server routines. The only real one is dead name notification. */
1740 do_mach_notify_dead_name (mach_port_t notify
, mach_port_t dead_port
)
1742 struct inf
*inf
= waiting_inf
;
1744 inf_debug (waiting_inf
, "port = %lu", dead_port
);
1746 if (inf
->task
&& inf
->task
->port
== dead_port
)
1748 proc_debug (inf
->task
, "is dead");
1749 inf
->task
->port
= MACH_PORT_NULL
;
1750 if (proc_wait_pid
== inf
->pid
)
1751 /* We have a wait outstanding on the process, which will return more
1752 detailed information, so delay until we get that. */
1753 inf
->wait
.suppress
= 1;
1755 /* We never waited for the process (maybe it wasn't a child), so just
1756 pretend it got a SIGKILL. */
1757 inf_task_died_status (inf
);
1761 struct proc
*thread
= inf_port_to_thread (inf
, dead_port
);
1765 proc_debug (thread
, "is dead");
1766 thread
->port
= MACH_PORT_NULL
;
1769 if (inf
->task
->dead
)
1770 /* Since the task is dead, its threads are dying with it. */
1771 inf
->wait
.suppress
= 1;
1774 mach_port_deallocate (mach_task_self (), dead_port
);
1775 inf
->threads_up_to_date
= 0; /* Just in case. */
1781 #define ILL_RPC(fun, ...) \
1782 extern kern_return_t fun (__VA_ARGS__); \
1783 kern_return_t fun (__VA_ARGS__) \
1785 warning (_("illegal rpc: %s"), #fun); \
1789 ILL_RPC (do_mach_notify_no_senders
,
1790 mach_port_t notify
, mach_port_mscount_t count
)
1791 ILL_RPC (do_mach_notify_port_deleted
,
1792 mach_port_t notify
, mach_port_t name
)
1793 ILL_RPC (do_mach_notify_msg_accepted
,
1794 mach_port_t notify
, mach_port_t name
)
1795 ILL_RPC (do_mach_notify_port_destroyed
,
1796 mach_port_t notify
, mach_port_t name
)
1797 ILL_RPC (do_mach_notify_send_once
,
1800 /* Process_reply server routines. We only use process_wait_reply. */
1803 S_proc_wait_reply (mach_port_t reply
, error_t err
,
1804 int status
, int sigcode
, rusage_t rusage
, pid_t pid
)
1806 struct inf
*inf
= waiting_inf
;
1808 inf_debug (inf
, "err = %s, pid = %d, status = 0x%x, sigcode = %d",
1809 err
? safe_strerror (err
) : "0", pid
, status
, sigcode
);
1811 if (err
&& proc_wait_pid
&& (!inf
->task
|| !inf
->task
->port
))
1812 /* Ack. The task has died, but the task-died notification code didn't
1813 tell anyone because it thought a more detailed reply from the
1814 procserver was forthcoming. However, we now learn that won't
1815 happen... So we have to act like the task just died, and this time,
1817 inf_task_died_status (inf
);
1819 if (--proc_waits_pending
== 0)
1820 /* PROC_WAIT_PID represents the most recent wait. We will always get
1821 replies in order because the proc server is single threaded. */
1824 inf_debug (inf
, "waits pending now: %d", proc_waits_pending
);
1830 warning (_("Can't wait for pid %d: %s"),
1831 inf
->pid
, safe_strerror (err
));
1834 /* Since we can't see the inferior's signals, don't trap them. */
1835 inf_set_traced (inf
, 0);
1838 else if (pid
== inf
->pid
)
1840 store_waitstatus (&inf
->wait
.status
, status
);
1841 if (inf
->wait
.status
.kind
== TARGET_WAITKIND_STOPPED
)
1842 /* The process has sent us a signal, and stopped itself in a sane
1843 state pending our actions. */
1845 inf_debug (inf
, "process has stopped itself");
1850 inf
->wait
.suppress
= 1; /* Something odd happened. Ignore. */
1855 ILL_RPC (S_proc_setmsgport_reply
,
1856 mach_port_t reply_port
, kern_return_t return_code
,
1857 mach_port_t oldmsgport
)
1858 ILL_RPC (S_proc_getmsgport_reply
,
1859 mach_port_t reply_port
, kern_return_t return_code
,
1860 mach_port_t msgports
)
1861 ILL_RPC (S_proc_pid2task_reply
,
1862 mach_port_t reply_port
, kern_return_t return_code
, mach_port_t task
)
1863 ILL_RPC (S_proc_task2pid_reply
,
1864 mach_port_t reply_port
, kern_return_t return_code
, pid_t pid
)
1865 ILL_RPC (S_proc_task2proc_reply
,
1866 mach_port_t reply_port
, kern_return_t return_code
, mach_port_t proc
)
1867 ILL_RPC (S_proc_proc2task_reply
,
1868 mach_port_t reply_port
, kern_return_t return_code
, mach_port_t task
)
1869 ILL_RPC (S_proc_pid2proc_reply
,
1870 mach_port_t reply_port
, kern_return_t return_code
, mach_port_t proc
)
1871 ILL_RPC (S_proc_getprocinfo_reply
,
1872 mach_port_t reply_port
, kern_return_t return_code
,
1873 int flags
, procinfo_t procinfo
, mach_msg_type_number_t procinfoCnt
,
1874 data_t threadwaits
, mach_msg_type_number_t threadwaitsCnt
)
1875 ILL_RPC (S_proc_getprocargs_reply
,
1876 mach_port_t reply_port
, kern_return_t return_code
,
1877 data_t procargs
, mach_msg_type_number_t procargsCnt
)
1878 ILL_RPC (S_proc_getprocenv_reply
,
1879 mach_port_t reply_port
, kern_return_t return_code
,
1880 data_t procenv
, mach_msg_type_number_t procenvCnt
)
1881 ILL_RPC (S_proc_getloginid_reply
,
1882 mach_port_t reply_port
, kern_return_t return_code
, pid_t login_id
)
1883 ILL_RPC (S_proc_getloginpids_reply
,
1884 mach_port_t reply_port
, kern_return_t return_code
,
1885 pidarray_t pids
, mach_msg_type_number_t pidsCnt
)
1886 ILL_RPC (S_proc_getlogin_reply
,
1887 mach_port_t reply_port
, kern_return_t return_code
, string_t logname
)
1888 ILL_RPC (S_proc_getsid_reply
,
1889 mach_port_t reply_port
, kern_return_t return_code
, pid_t sid
)
1890 ILL_RPC (S_proc_getsessionpgids_reply
,
1891 mach_port_t reply_port
, kern_return_t return_code
,
1892 pidarray_t pgidset
, mach_msg_type_number_t pgidsetCnt
)
1893 ILL_RPC (S_proc_getsessionpids_reply
,
1894 mach_port_t reply_port
, kern_return_t return_code
,
1895 pidarray_t pidset
, mach_msg_type_number_t pidsetCnt
)
1896 ILL_RPC (S_proc_getsidport_reply
,
1897 mach_port_t reply_port
, kern_return_t return_code
,
1898 mach_port_t sessport
)
1899 ILL_RPC (S_proc_getpgrp_reply
,
1900 mach_port_t reply_port
, kern_return_t return_code
, pid_t pgrp
)
1901 ILL_RPC (S_proc_getpgrppids_reply
,
1902 mach_port_t reply_port
, kern_return_t return_code
,
1903 pidarray_t pidset
, mach_msg_type_number_t pidsetCnt
)
1904 ILL_RPC (S_proc_get_tty_reply
,
1905 mach_port_t reply_port
, kern_return_t return_code
, mach_port_t tty
)
1906 ILL_RPC (S_proc_getnports_reply
,
1907 mach_port_t reply_port
, kern_return_t return_code
,
1908 mach_msg_type_number_t nports
)
1909 ILL_RPC (S_proc_is_important_reply
,
1910 mach_port_t reply_port
, kern_return_t return_code
,
1911 boolean_t essential
)
1912 ILL_RPC (S_proc_get_code_reply
,
1913 mach_port_t reply_port
, kern_return_t return_code
,
1914 vm_address_t start_code
, vm_address_t end_code
)
1916 /* Msg_reply server routines. We only use msg_sig_post_untraced_reply. */
1919 S_msg_sig_post_untraced_reply (mach_port_t reply
, error_t err
)
1921 struct inf
*inf
= waiting_inf
;
1924 /* EBUSY is what we get when the crash server has grabbed control of the
1925 process and doesn't like what signal we tried to send it. Just act
1926 like the process stopped (using a signal of 0 should mean that the
1927 *next* time the user continues, it will pass signal 0, which the crash
1928 server should like). */
1930 inf
->wait
.status
.kind
= TARGET_WAITKIND_STOPPED
;
1931 inf
->wait
.status
.value
.sig
= GDB_SIGNAL_0
;
1934 warning (_("Signal delivery failed: %s"), safe_strerror (err
));
1937 /* We only get this reply when we've posted a signal to a process which we
1938 thought was stopped, and which we expected to continue after the signal.
1939 Given that the signal has failed for some reason, it's reasonable to
1940 assume it's still stopped. */
1943 inf
->wait
.suppress
= 1;
1948 ILL_RPC (S_msg_sig_post_reply
,
1949 mach_port_t reply
, error_t err
)
1951 /* Returns the number of messages queued for the receive right PORT. */
1952 static mach_port_msgcount_t
1953 port_msgs_queued (mach_port_t port
)
1955 struct mach_port_status status
;
1957 mach_port_get_receive_status (mach_task_self (), port
, &status
);
1962 return status
.mps_msgcount
;
1966 /* Resume execution of the inferior process.
1968 If STEP is nonzero, single-step it.
1969 If SIGNAL is nonzero, give it that signal.
1972 -1 true Single step the current thread allowing other threads to run.
1973 -1 false Continue the current thread allowing other threads to run.
1974 X true Single step the given thread, don't allow any others to run.
1975 X false Continue the given thread, do not allow any others to run.
1976 (Where X, of course, is anything except -1)
1978 Note that a resume may not `take' if there are pending exceptions/&c
1979 still unprocessed from the last resume we did (any given resume may result
1980 in multiple events returned by wait). */
1983 gnu_resume (struct target_ops
*ops
,
1984 ptid_t ptid
, int step
, enum gdb_signal sig
)
1986 struct proc
*step_thread
= 0;
1988 struct inf
*inf
= gnu_current_inf
;
1990 inf_debug (inf
, "ptid = %s, step = %d, sig = %d",
1991 target_pid_to_str (ptid
), step
, sig
);
1993 inf_validate_procinfo (inf
);
1995 if (sig
!= GDB_SIGNAL_0
|| inf
->stopped
)
1997 if (sig
== GDB_SIGNAL_0
&& inf
->nomsg
)
2000 inf_signal (inf
, sig
);
2002 else if (inf
->wait
.exc
.reply
!= MACH_PORT_NULL
)
2003 /* We received an exception to which we have chosen not to forward, so
2004 abort the faulting thread, which will perhaps retake it. */
2006 proc_abort (inf
->wait
.thread
, 1);
2007 warning (_("Aborting %s with unforwarded exception %s."),
2008 proc_string (inf
->wait
.thread
),
2009 gdb_signal_to_name (inf
->wait
.status
.value
.sig
));
2012 if (port_msgs_queued (inf
->event_port
))
2013 /* If there are still messages in our event queue, don't bother resuming
2014 the process, as we're just going to stop it right away anyway. */
2017 inf_update_procs (inf
);
2019 /* A specific PTID means `step only this process id'. */
2020 resume_all
= ptid_equal (ptid
, minus_one_ptid
);
2023 /* Allow all threads to run, except perhaps single-stepping one. */
2025 inf_debug (inf
, "running all threads; tid = %d",
2026 ptid_get_pid (inferior_ptid
));
2027 ptid
= inferior_ptid
; /* What to step. */
2028 inf_set_threads_resume_sc (inf
, 0, 1);
2031 /* Just allow a single thread to run. */
2033 struct proc
*thread
= inf_tid_to_thread (inf
, ptid_get_lwp (ptid
));
2036 error (_("Can't run single thread id %s: no such thread!"),
2037 target_pid_to_str (ptid
));
2038 inf_debug (inf
, "running one thread: %s", target_pid_to_str (ptid
));
2039 inf_set_threads_resume_sc (inf
, thread
, 0);
2044 step_thread
= inf_tid_to_thread (inf
, ptid_get_lwp (ptid
));
2046 warning (_("Can't step thread id %s: no such thread."),
2047 target_pid_to_str (ptid
));
2049 inf_debug (inf
, "stepping thread: %s", target_pid_to_str (ptid
));
2051 if (step_thread
!= inf
->step_thread
)
2052 inf_set_step_thread (inf
, step_thread
);
2054 inf_debug (inf
, "here we go...");
2060 gnu_kill_inferior (struct target_ops
*ops
)
2062 struct proc
*task
= gnu_current_inf
->task
;
2066 proc_debug (task
, "terminating...");
2067 task_terminate (task
->port
);
2068 inf_set_pid (gnu_current_inf
, -1);
2070 target_mourn_inferior ();
2073 /* Clean up after the inferior dies. */
2075 gnu_mourn_inferior (struct target_ops
*ops
)
2077 inf_debug (gnu_current_inf
, "rip");
2078 inf_detach (gnu_current_inf
);
2079 inf_child_mourn_inferior (ops
);
2083 /* Fork an inferior process, and start debugging it. */
2085 /* Set INFERIOR_PID to the first thread available in the child, if any. */
2087 inf_pick_first_thread (void)
2089 if (gnu_current_inf
->task
&& gnu_current_inf
->threads
)
2090 /* The first thread. */
2091 return gnu_current_inf
->threads
->tid
;
2093 /* What may be the next thread. */
2094 return next_thread_id
;
2100 if (!gnu_current_inf
)
2101 gnu_current_inf
= make_inf ();
2102 return gnu_current_inf
;
2106 gnu_create_inferior (struct target_ops
*ops
,
2107 char *exec_file
, char *allargs
, char **env
,
2110 struct inf
*inf
= cur_inf ();
2113 void trace_me (void)
2115 /* We're in the child; make this process stop as soon as it execs. */
2116 inf_debug (inf
, "tracing self");
2117 if (ptrace (PTRACE_TRACEME
) != 0)
2118 error (_("ptrace (PTRACE_TRACEME) failed!"));
2121 inf_debug (inf
, "creating inferior");
2123 pid
= fork_inferior (exec_file
, allargs
, env
, trace_me
,
2124 NULL
, NULL
, NULL
, NULL
);
2126 /* Attach to the now stopped child, which is actually a shell... */
2127 inf_debug (inf
, "attaching to child: %d", pid
);
2129 inf_attach (inf
, pid
);
2133 inf
->pending_execs
= 1;
2137 /* Now let the child run again, knowing that it will stop
2138 immediately because of the ptrace. */
2141 /* We now have thread info. */
2142 thread_change_ptid (inferior_ptid
,
2143 ptid_build (inf
->pid
, inf_pick_first_thread (), 0));
2145 startup_inferior (START_INFERIOR_TRAPS_EXPECTED
);
2146 inf
->pending_execs
= 0;
2148 inf_validate_procinfo (inf
);
2149 inf_update_signal_thread (inf
);
2150 inf_set_traced (inf
, inf
->want_signals
);
2152 /* Execing the process will have trashed our exception ports; steal them
2153 back (or make sure they're restored if the user wants that). */
2154 if (inf
->want_exceptions
)
2155 inf_steal_exc_ports (inf
);
2157 inf_restore_exc_ports (inf
);
2161 /* Attach to process PID, then initialize for debugging it
2162 and wait for the trace-trap that results from attaching. */
2164 gnu_attach (struct target_ops
*ops
, const char *args
, int from_tty
)
2168 struct inf
*inf
= cur_inf ();
2169 struct inferior
*inferior
;
2171 pid
= parse_pid_to_attach (args
);
2173 if (pid
== getpid ()) /* Trying to masturbate? */
2174 error (_("I refuse to debug myself!"));
2178 exec_file
= (char *) get_exec_file (0);
2181 printf_unfiltered ("Attaching to program `%s', pid %d\n",
2184 printf_unfiltered ("Attaching to pid %d\n", pid
);
2186 gdb_flush (gdb_stdout
);
2189 inf_debug (inf
, "attaching to pid: %d", pid
);
2191 inf_attach (inf
, pid
);
2195 inferior
= current_inferior ();
2196 inferior_appeared (inferior
, pid
);
2197 inferior
->attach_flag
= 1;
2199 inf_update_procs (inf
);
2201 inferior_ptid
= ptid_build (pid
, inf_pick_first_thread (), 0);
2203 /* We have to initialize the terminal settings now, since the code
2204 below might try to restore them. */
2205 target_terminal_init ();
2207 /* If the process was stopped before we attached, make it continue the next
2208 time the user does a continue. */
2209 inf_validate_procinfo (inf
);
2211 inf_update_signal_thread (inf
);
2212 inf_set_traced (inf
, inf
->want_signals
);
2214 #if 0 /* Do we need this? */
2215 renumber_threads (0); /* Give our threads reasonable names. */
2220 /* Take a program previously attached to and detaches it.
2221 The program resumes execution and will no longer stop
2222 on signals, etc. We'd better not have left any breakpoints
2223 in the program or it'll die when it hits one. For this
2224 to work, it may be necessary for the process to have been
2225 previously attached. It *might* work if the program was
2226 started via fork. */
2228 gnu_detach (struct target_ops
*ops
, const char *args
, int from_tty
)
2234 char *exec_file
= get_exec_file (0);
2237 printf_unfiltered ("Detaching from program `%s' pid %d\n",
2238 exec_file
, gnu_current_inf
->pid
);
2240 printf_unfiltered ("Detaching from pid %d\n", gnu_current_inf
->pid
);
2241 gdb_flush (gdb_stdout
);
2244 pid
= gnu_current_inf
->pid
;
2246 inf_detach (gnu_current_inf
);
2248 inferior_ptid
= null_ptid
;
2249 detach_inferior (pid
);
2251 inf_child_maybe_unpush_target (ops
);
2255 gnu_terminal_init (struct target_ops
*self
)
2257 gdb_assert (gnu_current_inf
);
2258 child_terminal_init_with_pgrp (gnu_current_inf
->pid
);
2262 gnu_stop (struct target_ops
*self
, ptid_t ptid
)
2264 error (_("to_stop target function not implemented"));
2268 gnu_thread_alive (struct target_ops
*ops
, ptid_t ptid
)
2270 inf_update_procs (gnu_current_inf
);
2271 return !!inf_tid_to_thread (gnu_current_inf
,
2272 ptid_get_lwp (ptid
));
2276 /* Read inferior task's LEN bytes from ADDR and copy it to MYADDR in
2277 gdb's address space. Return 0 on failure; number of bytes read
2280 gnu_read_inferior (task_t task
, CORE_ADDR addr
, gdb_byte
*myaddr
, int length
)
2283 vm_address_t low_address
= (vm_address_t
) trunc_page (addr
);
2284 vm_size_t aligned_length
=
2285 (vm_size_t
) round_page (addr
+ length
) - low_address
;
2287 mach_msg_type_number_t copy_count
;
2289 /* Get memory from inferior with page aligned addresses. */
2290 err
= vm_read (task
, low_address
, aligned_length
, &copied
, ©_count
);
2294 err
= hurd_safe_copyin (myaddr
, (void *) (addr
- low_address
+ copied
),
2298 warning (_("Read from inferior faulted: %s"), safe_strerror (err
));
2302 err
= vm_deallocate (mach_task_self (), copied
, copy_count
);
2304 warning (_("gnu_read_inferior vm_deallocate failed: %s"),
2305 safe_strerror (err
));
2310 #define CHK_GOTO_OUT(str,ret) \
2311 do if (ret != KERN_SUCCESS) { errstr = #str; goto out; } while(0)
2313 struct vm_region_list
2315 struct vm_region_list
*next
;
2316 vm_prot_t protection
;
2321 struct obstack region_obstack
;
2323 /* Write gdb's LEN bytes from MYADDR and copy it to ADDR in inferior
2324 task's address space. */
2326 gnu_write_inferior (task_t task
, CORE_ADDR addr
,
2327 const gdb_byte
*myaddr
, int length
)
2330 vm_address_t low_address
= (vm_address_t
) trunc_page (addr
);
2331 vm_size_t aligned_length
=
2332 (vm_size_t
) round_page (addr
+ length
) - low_address
;
2334 mach_msg_type_number_t copy_count
;
2337 char *errstr
= "Bug in gnu_write_inferior";
2339 struct vm_region_list
*region_element
;
2340 struct vm_region_list
*region_head
= (struct vm_region_list
*) NULL
;
2342 /* Get memory from inferior with page aligned addresses. */
2343 err
= vm_read (task
,
2348 CHK_GOTO_OUT ("gnu_write_inferior vm_read failed", err
);
2352 err
= hurd_safe_copyout ((void *) (addr
- low_address
+ copied
),
2354 CHK_GOTO_OUT ("Write to inferior faulted", err
);
2356 obstack_init (®ion_obstack
);
2358 /* Do writes atomically.
2359 First check for holes and unwritable memory. */
2361 vm_size_t remaining_length
= aligned_length
;
2362 vm_address_t region_address
= low_address
;
2364 struct vm_region_list
*scan
;
2366 while (region_address
< low_address
+ aligned_length
)
2368 vm_prot_t protection
;
2369 vm_prot_t max_protection
;
2370 vm_inherit_t inheritance
;
2372 mach_port_t object_name
;
2374 vm_size_t region_length
= remaining_length
;
2375 vm_address_t old_address
= region_address
;
2377 err
= vm_region (task
,
2386 CHK_GOTO_OUT ("vm_region failed", err
);
2388 /* Check for holes in memory. */
2389 if (old_address
!= region_address
)
2391 warning (_("No memory at 0x%lx. Nothing written"),
2398 if (!(max_protection
& VM_PROT_WRITE
))
2400 warning (_("Memory at address 0x%lx is unwritable. "
2408 /* Chain the regions for later use. */
2410 (struct vm_region_list
*)
2411 obstack_alloc (®ion_obstack
, sizeof (struct vm_region_list
));
2413 region_element
->protection
= protection
;
2414 region_element
->start
= region_address
;
2415 region_element
->length
= region_length
;
2417 /* Chain the regions along with protections. */
2418 region_element
->next
= region_head
;
2419 region_head
= region_element
;
2421 region_address
+= region_length
;
2422 remaining_length
= remaining_length
- region_length
;
2425 /* If things fail after this, we give up.
2426 Somebody is messing up inferior_task's mappings. */
2428 /* Enable writes to the chained vm regions. */
2429 for (scan
= region_head
; scan
; scan
= scan
->next
)
2431 if (!(scan
->protection
& VM_PROT_WRITE
))
2433 err
= vm_protect (task
,
2437 scan
->protection
| VM_PROT_WRITE
);
2438 CHK_GOTO_OUT ("vm_protect: enable write failed", err
);
2442 err
= vm_write (task
,
2446 CHK_GOTO_OUT ("vm_write failed", err
);
2448 /* Set up the original region protections, if they were changed. */
2449 for (scan
= region_head
; scan
; scan
= scan
->next
)
2451 if (!(scan
->protection
& VM_PROT_WRITE
))
2453 err
= vm_protect (task
,
2458 CHK_GOTO_OUT ("vm_protect: enable write failed", err
);
2466 obstack_free (®ion_obstack
, 0);
2468 (void) vm_deallocate (mach_task_self (),
2473 if (err
!= KERN_SUCCESS
)
2475 warning (_("%s: %s"), errstr
, mach_error_string (err
));
2484 /* Implement the to_xfer_partial target_ops method for
2485 TARGET_OBJECT_MEMORY. */
2487 static enum target_xfer_status
2488 gnu_xfer_memory (gdb_byte
*readbuf
, const gdb_byte
*writebuf
,
2489 CORE_ADDR memaddr
, ULONGEST len
, ULONGEST
*xfered_len
)
2491 task_t task
= (gnu_current_inf
2492 ? (gnu_current_inf
->task
2493 ? gnu_current_inf
->task
->port
: 0)
2497 if (task
== MACH_PORT_NULL
)
2498 return TARGET_XFER_E_IO
;
2500 if (writebuf
!= NULL
)
2502 inf_debug (gnu_current_inf
, "writing %s[%s] <-- %s",
2503 paddress (target_gdbarch (), memaddr
), pulongest (len
),
2504 host_address_to_string (writebuf
));
2505 res
= gnu_write_inferior (task
, memaddr
, writebuf
, len
);
2509 inf_debug (gnu_current_inf
, "reading %s[%s] --> %s",
2510 paddress (target_gdbarch (), memaddr
), pulongest (len
),
2511 host_address_to_string (readbuf
));
2512 res
= gnu_read_inferior (task
, memaddr
, readbuf
, len
);
2514 gdb_assert (res
>= 0);
2516 return TARGET_XFER_E_IO
;
2519 *xfered_len
= (ULONGEST
) res
;
2520 return TARGET_XFER_OK
;
2524 /* Target to_xfer_partial implementation. */
2526 static enum target_xfer_status
2527 gnu_xfer_partial (struct target_ops
*ops
, enum target_object object
,
2528 const char *annex
, gdb_byte
*readbuf
,
2529 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
2530 ULONGEST
*xfered_len
)
2534 case TARGET_OBJECT_MEMORY
:
2535 return gnu_xfer_memory (readbuf
, writebuf
, offset
, len
, xfered_len
);
2537 return TARGET_XFER_E_IO
;
2541 /* Call FUNC on each memory region in the task. */
2543 gnu_find_memory_regions (struct target_ops
*self
,
2544 find_memory_region_ftype func
, void *data
)
2548 vm_address_t region_address
, last_region_address
, last_region_end
;
2549 vm_prot_t last_protection
;
2551 if (gnu_current_inf
== 0 || gnu_current_inf
->task
== 0)
2553 task
= gnu_current_inf
->task
->port
;
2554 if (task
== MACH_PORT_NULL
)
2557 region_address
= last_region_address
= last_region_end
= VM_MIN_ADDRESS
;
2558 last_protection
= VM_PROT_NONE
;
2559 while (region_address
< VM_MAX_ADDRESS
)
2561 vm_prot_t protection
;
2562 vm_prot_t max_protection
;
2563 vm_inherit_t inheritance
;
2565 mach_port_t object_name
;
2567 vm_size_t region_length
= VM_MAX_ADDRESS
- region_address
;
2568 vm_address_t old_address
= region_address
;
2570 err
= vm_region (task
,
2579 if (err
== KERN_NO_SPACE
)
2581 if (err
!= KERN_SUCCESS
)
2583 warning (_("vm_region failed: %s"), mach_error_string (err
));
2587 if (protection
== last_protection
&& region_address
== last_region_end
)
2588 /* This region is contiguous with and indistinguishable from
2589 the previous one, so we just extend that one. */
2590 last_region_end
= region_address
+= region_length
;
2593 /* This region is distinct from the last one we saw, so report
2594 that previous one. */
2595 if (last_protection
!= VM_PROT_NONE
)
2596 (*func
) (last_region_address
,
2597 last_region_end
- last_region_address
,
2598 last_protection
& VM_PROT_READ
,
2599 last_protection
& VM_PROT_WRITE
,
2600 last_protection
& VM_PROT_EXECUTE
,
2601 1, /* MODIFIED is unknown, pass it as true. */
2603 last_region_address
= region_address
;
2604 last_region_end
= region_address
+= region_length
;
2605 last_protection
= protection
;
2609 /* Report the final region. */
2610 if (last_region_end
> last_region_address
&& last_protection
!= VM_PROT_NONE
)
2611 (*func
) (last_region_address
, last_region_end
- last_region_address
,
2612 last_protection
& VM_PROT_READ
,
2613 last_protection
& VM_PROT_WRITE
,
2614 last_protection
& VM_PROT_EXECUTE
,
2615 1, /* MODIFIED is unknown, pass it as true. */
2622 /* Return printable description of proc. */
2624 proc_string (struct proc
*proc
)
2626 static char tid_str
[80];
2628 if (proc_is_task (proc
))
2629 xsnprintf (tid_str
, sizeof (tid_str
), "process %d", proc
->inf
->pid
);
2631 xsnprintf (tid_str
, sizeof (tid_str
), "Thread %d.%d",
2632 proc
->inf
->pid
, proc
->tid
);
2637 gnu_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
2639 struct inf
*inf
= gnu_current_inf
;
2640 int tid
= ptid_get_lwp (ptid
);
2641 struct proc
*thread
= inf_tid_to_thread (inf
, tid
);
2644 return proc_string (thread
);
2647 static char tid_str
[80];
2649 xsnprintf (tid_str
, sizeof (tid_str
), "bogus thread id %d", tid
);
2655 /* Create a prototype generic GNU/Hurd target. The client can
2656 override it with local methods. */
2661 struct target_ops
*t
= inf_child_target ();
2663 t
->to_attach
= gnu_attach
;
2664 t
->to_attach_no_wait
= 1;
2665 t
->to_detach
= gnu_detach
;
2666 t
->to_resume
= gnu_resume
;
2667 t
->to_wait
= gnu_wait
;
2668 t
->to_xfer_partial
= gnu_xfer_partial
;
2669 t
->to_find_memory_regions
= gnu_find_memory_regions
;
2670 t
->to_terminal_init
= gnu_terminal_init
;
2671 t
->to_kill
= gnu_kill_inferior
;
2672 t
->to_create_inferior
= gnu_create_inferior
;
2673 t
->to_mourn_inferior
= gnu_mourn_inferior
;
2674 t
->to_thread_alive
= gnu_thread_alive
;
2675 t
->to_pid_to_str
= gnu_pid_to_str
;
2676 t
->to_stop
= gnu_stop
;
2682 /* User task commands. */
2684 static struct cmd_list_element
*set_task_cmd_list
= 0;
2685 static struct cmd_list_element
*show_task_cmd_list
= 0;
2686 /* User thread commands. */
2688 /* Commands with a prefix of `set/show thread'. */
2689 extern struct cmd_list_element
*thread_cmd_list
;
2690 struct cmd_list_element
*set_thread_cmd_list
= NULL
;
2691 struct cmd_list_element
*show_thread_cmd_list
= NULL
;
2693 /* Commands with a prefix of `set/show thread default'. */
2694 struct cmd_list_element
*set_thread_default_cmd_list
= NULL
;
2695 struct cmd_list_element
*show_thread_default_cmd_list
= NULL
;
2698 set_thread_cmd (char *args
, int from_tty
)
2700 printf_unfiltered ("\"set thread\" must be followed by the "
2701 "name of a thread property, or \"default\".\n");
2705 show_thread_cmd (char *args
, int from_tty
)
2707 printf_unfiltered ("\"show thread\" must be followed by the "
2708 "name of a thread property, or \"default\".\n");
2712 set_thread_default_cmd (char *args
, int from_tty
)
2714 printf_unfiltered ("\"set thread default\" must be followed "
2715 "by the name of a thread property.\n");
2719 show_thread_default_cmd (char *args
, int from_tty
)
2721 printf_unfiltered ("\"show thread default\" must be followed "
2722 "by the name of a thread property.\n");
2726 parse_int_arg (char *args
, char *cmd_prefix
)
2731 int val
= strtoul (args
, &arg_end
, 10);
2733 if (*args
&& *arg_end
== '\0')
2736 error (_("Illegal argument for \"%s\" command, should be an integer."),
2741 _parse_bool_arg (char *args
, char *t_val
, char *f_val
, char *cmd_prefix
)
2743 if (!args
|| strcmp (args
, t_val
) == 0)
2745 else if (strcmp (args
, f_val
) == 0)
2748 error (_("Illegal argument for \"%s\" command, "
2749 "should be \"%s\" or \"%s\"."),
2750 cmd_prefix
, t_val
, f_val
);
2753 #define parse_bool_arg(args, cmd_prefix) \
2754 _parse_bool_arg (args, "on", "off", cmd_prefix)
2757 check_empty (char *args
, char *cmd_prefix
)
2760 error (_("Garbage after \"%s\" command: `%s'"), cmd_prefix
, args
);
2763 /* Returns the alive thread named by INFERIOR_PID, or signals an error. */
2764 static struct proc
*
2767 struct inf
*inf
= cur_inf ();
2768 struct proc
*thread
= inf_tid_to_thread (inf
,
2769 ptid_get_lwp (inferior_ptid
));
2771 error (_("No current thread."));
2775 /* Returns the current inferior, but signals an error if it has no task. */
2779 struct inf
*inf
= cur_inf ();
2782 error (_("No current process."));
2788 set_task_pause_cmd (char *args
, int from_tty
)
2790 struct inf
*inf
= cur_inf ();
2791 int old_sc
= inf
->pause_sc
;
2793 inf
->pause_sc
= parse_bool_arg (args
, "set task pause");
2795 if (old_sc
== 0 && inf
->pause_sc
!= 0)
2796 /* If the task is currently unsuspended, immediately suspend it,
2797 otherwise wait until the next time it gets control. */
2802 show_task_pause_cmd (char *args
, int from_tty
)
2804 struct inf
*inf
= cur_inf ();
2806 check_empty (args
, "show task pause");
2807 printf_unfiltered ("The inferior task %s suspended while gdb has control.\n",
2809 ? (inf
->pause_sc
== 0 ? "isn't" : "is")
2810 : (inf
->pause_sc
== 0 ? "won't be" : "will be"));
2814 set_task_detach_sc_cmd (char *args
, int from_tty
)
2816 cur_inf ()->detach_sc
= parse_int_arg (args
,
2817 "set task detach-suspend-count");
2821 show_task_detach_sc_cmd (char *args
, int from_tty
)
2823 check_empty (args
, "show task detach-suspend-count");
2824 printf_unfiltered ("The inferior task will be left with a "
2825 "suspend count of %d when detaching.\n",
2826 cur_inf ()->detach_sc
);
2831 set_thread_default_pause_cmd (char *args
, int from_tty
)
2833 struct inf
*inf
= cur_inf ();
2835 inf
->default_thread_pause_sc
=
2836 parse_bool_arg (args
, "set thread default pause") ? 0 : 1;
2840 show_thread_default_pause_cmd (char *args
, int from_tty
)
2842 struct inf
*inf
= cur_inf ();
2843 int sc
= inf
->default_thread_pause_sc
;
2845 check_empty (args
, "show thread default pause");
2846 printf_unfiltered ("New threads %s suspended while gdb has control%s.\n",
2847 sc
? "are" : "aren't",
2848 !sc
&& inf
->pause_sc
? " (but the task is)" : "");
2852 set_thread_default_run_cmd (char *args
, int from_tty
)
2854 struct inf
*inf
= cur_inf ();
2856 inf
->default_thread_run_sc
=
2857 parse_bool_arg (args
, "set thread default run") ? 0 : 1;
2861 show_thread_default_run_cmd (char *args
, int from_tty
)
2863 struct inf
*inf
= cur_inf ();
2865 check_empty (args
, "show thread default run");
2866 printf_unfiltered ("New threads %s allowed to run.\n",
2867 inf
->default_thread_run_sc
== 0 ? "are" : "aren't");
2871 set_thread_default_detach_sc_cmd (char *args
, int from_tty
)
2873 cur_inf ()->default_thread_detach_sc
=
2874 parse_int_arg (args
, "set thread default detach-suspend-count");
2878 show_thread_default_detach_sc_cmd (char *args
, int from_tty
)
2880 check_empty (args
, "show thread default detach-suspend-count");
2881 printf_unfiltered ("New threads will get a detach-suspend-count of %d.\n",
2882 cur_inf ()->default_thread_detach_sc
);
2886 /* Steal a send right called NAME in the inferior task, and make it PROC's
2887 saved exception port. */
2889 steal_exc_port (struct proc
*proc
, mach_port_t name
)
2893 mach_msg_type_name_t port_type
;
2895 if (!proc
|| !proc
->inf
->task
)
2896 error (_("No inferior task."));
2898 err
= mach_port_extract_right (proc
->inf
->task
->port
,
2899 name
, MACH_MSG_TYPE_COPY_SEND
,
2902 error (_("Couldn't extract send right %lu from inferior: %s"),
2903 name
, safe_strerror (err
));
2905 if (proc
->saved_exc_port
)
2906 /* Get rid of our reference to the old one. */
2907 mach_port_deallocate (mach_task_self (), proc
->saved_exc_port
);
2909 proc
->saved_exc_port
= port
;
2911 if (!proc
->exc_port
)
2912 /* If PROC is a thread, we may not have set its exception port
2913 before. We can't use proc_steal_exc_port because it also sets
2916 proc
->exc_port
= proc
->inf
->event_port
;
2917 err
= proc_set_exception_port (proc
, proc
->exc_port
);
2918 error (_("Can't set exception port for %s: %s"),
2919 proc_string (proc
), safe_strerror (err
));
2924 set_task_exc_port_cmd (char *args
, int from_tty
)
2926 struct inf
*inf
= cur_inf ();
2929 error (_("No argument to \"set task exception-port\" command."));
2930 steal_exc_port (inf
->task
, parse_and_eval_address (args
));
2934 set_stopped_cmd (char *args
, int from_tty
)
2936 cur_inf ()->stopped
= _parse_bool_arg (args
, "yes", "no", "set stopped");
2940 show_stopped_cmd (char *args
, int from_tty
)
2942 struct inf
*inf
= active_inf ();
2944 check_empty (args
, "show stopped");
2945 printf_unfiltered ("The inferior process %s stopped.\n",
2946 inf
->stopped
? "is" : "isn't");
2950 set_sig_thread_cmd (char *args
, int from_tty
)
2952 struct inf
*inf
= cur_inf ();
2954 if (!args
|| (!isdigit (*args
) && strcmp (args
, "none") != 0))
2955 error (_("Illegal argument to \"set signal-thread\" command.\n"
2956 "Should be an integer thread ID, or `none'."));
2958 if (strcmp (args
, "none") == 0)
2959 inf
->signal_thread
= 0;
2962 ptid_t ptid
= thread_id_to_pid (atoi (args
));
2964 if (ptid_equal (ptid
, minus_one_ptid
))
2965 error (_("Thread ID %s not known. "
2966 "Use the \"info threads\" command to\n"
2967 "see the IDs of currently known threads."), args
);
2968 inf
->signal_thread
= inf_tid_to_thread (inf
, ptid_get_lwp (ptid
));
2973 show_sig_thread_cmd (char *args
, int from_tty
)
2975 struct inf
*inf
= active_inf ();
2977 check_empty (args
, "show signal-thread");
2978 if (inf
->signal_thread
)
2979 printf_unfiltered ("The signal thread is %s.\n",
2980 proc_string (inf
->signal_thread
));
2982 printf_unfiltered ("There is no signal thread.\n");
2987 set_signals_cmd (char *args
, int from_tty
)
2989 struct inf
*inf
= cur_inf ();
2991 inf
->want_signals
= parse_bool_arg (args
, "set signals");
2993 if (inf
->task
&& inf
->want_signals
!= inf
->traced
)
2994 /* Make this take effect immediately in a running process. */
2995 inf_set_traced (inf
, inf
->want_signals
);
2999 show_signals_cmd (char *args
, int from_tty
)
3001 struct inf
*inf
= cur_inf ();
3003 check_empty (args
, "show signals");
3004 printf_unfiltered ("The inferior process's signals %s intercepted.\n",
3006 ? (inf
->traced
? "are" : "aren't")
3007 : (inf
->want_signals
? "will be" : "won't be"));
3011 set_exceptions_cmd (char *args
, int from_tty
)
3013 struct inf
*inf
= cur_inf ();
3014 int val
= parse_bool_arg (args
, "set exceptions");
3016 /* Make this take effect immediately in a running process. */
3019 inf
->want_exceptions
= val
;
3023 show_exceptions_cmd (char *args
, int from_tty
)
3025 struct inf
*inf
= cur_inf ();
3027 check_empty (args
, "show exceptions");
3028 printf_unfiltered ("Exceptions in the inferior %s trapped.\n",
3030 ? (inf
->want_exceptions
? "are" : "aren't")
3031 : (inf
->want_exceptions
? "will be" : "won't be"));
3036 set_task_cmd (char *args
, int from_tty
)
3038 printf_unfiltered ("\"set task\" must be followed by the name"
3039 " of a task property.\n");
3043 show_task_cmd (char *args
, int from_tty
)
3045 struct inf
*inf
= cur_inf ();
3047 check_empty (args
, "show task");
3049 show_signals_cmd (0, from_tty
);
3050 show_exceptions_cmd (0, from_tty
);
3051 show_task_pause_cmd (0, from_tty
);
3053 if (inf
->pause_sc
== 0)
3054 show_thread_default_pause_cmd (0, from_tty
);
3055 show_thread_default_run_cmd (0, from_tty
);
3059 show_stopped_cmd (0, from_tty
);
3060 show_sig_thread_cmd (0, from_tty
);
3063 if (inf
->detach_sc
!= 0)
3064 show_task_detach_sc_cmd (0, from_tty
);
3065 if (inf
->default_thread_detach_sc
!= 0)
3066 show_thread_default_detach_sc_cmd (0, from_tty
);
3071 set_noninvasive_cmd (char *args
, int from_tty
)
3073 /* Invert the sense of the arg for each component. */
3074 char *inv_args
= parse_bool_arg (args
, "set noninvasive") ? "off" : "on";
3076 set_task_pause_cmd (inv_args
, from_tty
);
3077 set_signals_cmd (inv_args
, from_tty
);
3078 set_exceptions_cmd (inv_args
, from_tty
);
3083 info_port_rights (const char *args
, mach_port_type_t only
)
3085 struct inf
*inf
= active_inf ();
3086 struct value
*vmark
= value_mark ();
3089 /* Explicit list of port rights. */
3093 struct value
*val
= parse_to_comma_and_eval (&args
);
3094 long right
= value_as_long (val
);
3096 print_port_info (right
, 0, inf
->task
->port
, PORTINFO_DETAILS
,
3100 error (_("%ld: %s."), right
, safe_strerror (err
));
3104 /* Print all of them. */
3107 print_task_ports_info (inf
->task
->port
, only
, PORTINFO_DETAILS
,
3110 error (_("%s."), safe_strerror (err
));
3113 value_free_to_mark (vmark
);
3117 info_send_rights_cmd (char *args
, int from_tty
)
3119 info_port_rights (args
, MACH_PORT_TYPE_SEND
);
3123 info_recv_rights_cmd (char *args
, int from_tty
)
3125 info_port_rights (args
, MACH_PORT_TYPE_RECEIVE
);
3129 info_port_sets_cmd (char *args
, int from_tty
)
3131 info_port_rights (args
, MACH_PORT_TYPE_PORT_SET
);
3135 info_dead_names_cmd (char *args
, int from_tty
)
3137 info_port_rights (args
, MACH_PORT_TYPE_DEAD_NAME
);
3141 info_port_rights_cmd (char *args
, int from_tty
)
3143 info_port_rights (args
, ~0);
3148 add_task_commands (void)
3150 add_cmd ("pause", class_run
, set_thread_default_pause_cmd
, _("\
3151 Set whether the new threads are suspended while gdb has control.\n\
3152 This property normally has no effect because the whole task is\n\
3153 suspended, however, that may be disabled with \"set task pause off\".\n\
3154 The default value is \"off\"."),
3155 &set_thread_default_cmd_list
);
3156 add_cmd ("pause", no_class
, show_thread_default_pause_cmd
, _("\
3157 Show whether new threads are suspended while gdb has control."),
3158 &show_thread_default_cmd_list
);
3160 add_cmd ("run", class_run
, set_thread_default_run_cmd
, _("\
3161 Set whether new threads are allowed to run (once gdb has noticed them)."),
3162 &set_thread_default_cmd_list
);
3163 add_cmd ("run", no_class
, show_thread_default_run_cmd
, _("\
3164 Show whether new threads are allowed to run (once gdb has noticed them)."),
3165 &show_thread_default_cmd_list
);
3167 add_cmd ("detach-suspend-count", class_run
, set_thread_default_detach_sc_cmd
,
3168 _("Set the default detach-suspend-count value for new threads."),
3169 &set_thread_default_cmd_list
);
3170 add_cmd ("detach-suspend-count", no_class
, show_thread_default_detach_sc_cmd
,
3171 _("Show the default detach-suspend-count value for new threads."),
3172 &show_thread_default_cmd_list
);
3174 add_cmd ("signals", class_run
, set_signals_cmd
, _("\
3175 Set whether the inferior process's signals will be intercepted.\n\
3176 Mach exceptions (such as breakpoint traps) are not affected."),
3178 add_alias_cmd ("sigs", "signals", class_run
, 1, &setlist
);
3179 add_cmd ("signals", no_class
, show_signals_cmd
, _("\
3180 Show whether the inferior process's signals will be intercepted."),
3182 add_alias_cmd ("sigs", "signals", no_class
, 1, &showlist
);
3184 add_cmd ("signal-thread", class_run
, set_sig_thread_cmd
, _("\
3185 Set the thread that gdb thinks is the libc signal thread.\n\
3186 This thread is run when delivering a signal to a non-stopped process."),
3188 add_alias_cmd ("sigthread", "signal-thread", class_run
, 1, &setlist
);
3189 add_cmd ("signal-thread", no_class
, show_sig_thread_cmd
, _("\
3190 Set the thread that gdb thinks is the libc signal thread."),
3192 add_alias_cmd ("sigthread", "signal-thread", no_class
, 1, &showlist
);
3194 add_cmd ("stopped", class_run
, set_stopped_cmd
, _("\
3195 Set whether gdb thinks the inferior process is stopped as with SIGSTOP.\n\
3196 Stopped process will be continued by sending them a signal."),
3198 add_cmd ("stopped", no_class
, show_stopped_cmd
, _("\
3199 Show whether gdb thinks the inferior process is stopped as with SIGSTOP."),
3202 add_cmd ("exceptions", class_run
, set_exceptions_cmd
, _("\
3203 Set whether exceptions in the inferior process will be trapped.\n\
3204 When exceptions are turned off, neither breakpoints nor single-stepping\n\
3207 /* Allow `set exc' despite conflict with `set exception-port'. */
3208 add_alias_cmd ("exc", "exceptions", class_run
, 1, &setlist
);
3209 add_cmd ("exceptions", no_class
, show_exceptions_cmd
, _("\
3210 Show whether exceptions in the inferior process will be trapped."),
3213 add_prefix_cmd ("task", no_class
, set_task_cmd
,
3214 _("Command prefix for setting task attributes."),
3215 &set_task_cmd_list
, "set task ", 0, &setlist
);
3216 add_prefix_cmd ("task", no_class
, show_task_cmd
,
3217 _("Command prefix for showing task attributes."),
3218 &show_task_cmd_list
, "show task ", 0, &showlist
);
3220 add_cmd ("pause", class_run
, set_task_pause_cmd
, _("\
3221 Set whether the task is suspended while gdb has control.\n\
3222 A value of \"on\" takes effect immediately, otherwise nothing happens\n\
3223 until the next time the program is continued.\n\
3224 When setting this to \"off\", \"set thread default pause on\" can be\n\
3225 used to pause individual threads by default instead."),
3226 &set_task_cmd_list
);
3227 add_cmd ("pause", no_class
, show_task_pause_cmd
,
3228 _("Show whether the task is suspended while gdb has control."),
3229 &show_task_cmd_list
);
3231 add_cmd ("detach-suspend-count", class_run
, set_task_detach_sc_cmd
,
3232 _("Set the suspend count will leave on the thread when detaching."),
3233 &set_task_cmd_list
);
3234 add_cmd ("detach-suspend-count", no_class
, show_task_detach_sc_cmd
,
3235 _("Show the suspend count will leave "
3236 "on the thread when detaching."),
3237 &show_task_cmd_list
);
3239 add_cmd ("exception-port", no_class
, set_task_exc_port_cmd
, _("\
3240 Set the task exception port to which we forward exceptions.\n\
3241 The argument should be the value of the send right in the task."),
3242 &set_task_cmd_list
);
3243 add_alias_cmd ("excp", "exception-port", no_class
, 1, &set_task_cmd_list
);
3244 add_alias_cmd ("exc-port", "exception-port", no_class
, 1,
3245 &set_task_cmd_list
);
3247 /* A convenient way of turning on all options require to noninvasively
3248 debug running tasks. */
3249 add_cmd ("noninvasive", no_class
, set_noninvasive_cmd
, _("\
3250 Set task options so that we interfere as little as possible.\n\
3251 This is the same as setting `task pause', `exceptions', and\n\
3252 `signals' to the opposite value."),
3255 /* Commands to show information about the task's ports. */
3256 add_cmd ("send-rights", class_info
, info_send_rights_cmd
,
3257 _("Show information about the task's send rights"),
3259 add_cmd ("receive-rights", class_info
, info_recv_rights_cmd
,
3260 _("Show information about the task's receive rights"),
3262 add_cmd ("port-rights", class_info
, info_port_rights_cmd
,
3263 _("Show information about the task's port rights"),
3265 add_cmd ("port-sets", class_info
, info_port_sets_cmd
,
3266 _("Show information about the task's port sets"),
3268 add_cmd ("dead-names", class_info
, info_dead_names_cmd
,
3269 _("Show information about the task's dead names"),
3271 add_info_alias ("ports", "port-rights", 1);
3272 add_info_alias ("port", "port-rights", 1);
3273 add_info_alias ("psets", "port-sets", 1);
3278 set_thread_pause_cmd (char *args
, int from_tty
)
3280 struct proc
*thread
= cur_thread ();
3281 int old_sc
= thread
->pause_sc
;
3283 thread
->pause_sc
= parse_bool_arg (args
, "set thread pause");
3284 if (old_sc
== 0 && thread
->pause_sc
!= 0 && thread
->inf
->pause_sc
== 0)
3285 /* If the task is currently unsuspended, immediately suspend it,
3286 otherwise wait until the next time it gets control. */
3287 inf_suspend (thread
->inf
);
3291 show_thread_pause_cmd (char *args
, int from_tty
)
3293 struct proc
*thread
= cur_thread ();
3294 int sc
= thread
->pause_sc
;
3296 check_empty (args
, "show task pause");
3297 printf_unfiltered ("Thread %s %s suspended while gdb has control%s.\n",
3298 proc_string (thread
),
3299 sc
? "is" : "isn't",
3300 !sc
&& thread
->inf
->pause_sc
? " (but the task is)" : "");
3304 set_thread_run_cmd (char *args
, int from_tty
)
3306 struct proc
*thread
= cur_thread ();
3308 thread
->run_sc
= parse_bool_arg (args
, "set thread run") ? 0 : 1;
3312 show_thread_run_cmd (char *args
, int from_tty
)
3314 struct proc
*thread
= cur_thread ();
3316 check_empty (args
, "show thread run");
3317 printf_unfiltered ("Thread %s %s allowed to run.",
3318 proc_string (thread
),
3319 thread
->run_sc
== 0 ? "is" : "isn't");
3323 set_thread_detach_sc_cmd (char *args
, int from_tty
)
3325 cur_thread ()->detach_sc
= parse_int_arg (args
,
3326 "set thread detach-suspend-count");
3330 show_thread_detach_sc_cmd (char *args
, int from_tty
)
3332 struct proc
*thread
= cur_thread ();
3334 check_empty (args
, "show thread detach-suspend-count");
3335 printf_unfiltered ("Thread %s will be left with a suspend count"
3336 " of %d when detaching.\n",
3337 proc_string (thread
),
3342 set_thread_exc_port_cmd (char *args
, int from_tty
)
3344 struct proc
*thread
= cur_thread ();
3347 error (_("No argument to \"set thread exception-port\" command."));
3348 steal_exc_port (thread
, parse_and_eval_address (args
));
3353 show_thread_cmd (char *args
, int from_tty
)
3355 struct proc
*thread
= cur_thread ();
3357 check_empty (args
, "show thread");
3358 show_thread_run_cmd (0, from_tty
);
3359 show_thread_pause_cmd (0, from_tty
);
3360 if (thread
->detach_sc
!= 0)
3361 show_thread_detach_sc_cmd (0, from_tty
);
3366 thread_takeover_sc_cmd (char *args
, int from_tty
)
3368 struct proc
*thread
= cur_thread ();
3370 thread_basic_info_data_t _info
;
3371 thread_basic_info_t info
= &_info
;
3372 mach_msg_type_number_t info_len
= THREAD_BASIC_INFO_COUNT
;
3374 thread_info (thread
->port
, THREAD_BASIC_INFO
, (int *) &info
, &info_len
);
3376 error (("%s."), safe_strerror (err
));
3377 thread
->sc
= info
->suspend_count
;
3379 printf_unfiltered ("Suspend count was %d.\n", thread
->sc
);
3381 vm_deallocate (mach_task_self (), (vm_address_t
) info
,
3382 info_len
* sizeof (int));
3387 add_thread_commands (void)
3389 add_prefix_cmd ("thread", no_class
, set_thread_cmd
,
3390 _("Command prefix for setting thread properties."),
3391 &set_thread_cmd_list
, "set thread ", 0, &setlist
);
3392 add_prefix_cmd ("default", no_class
, show_thread_cmd
,
3393 _("Command prefix for setting default thread properties."),
3394 &set_thread_default_cmd_list
, "set thread default ", 0,
3395 &set_thread_cmd_list
);
3396 add_prefix_cmd ("thread", no_class
, set_thread_default_cmd
,
3397 _("Command prefix for showing thread properties."),
3398 &show_thread_cmd_list
, "show thread ", 0, &showlist
);
3399 add_prefix_cmd ("default", no_class
, show_thread_default_cmd
,
3400 _("Command prefix for showing default thread properties."),
3401 &show_thread_default_cmd_list
, "show thread default ", 0,
3402 &show_thread_cmd_list
);
3404 add_cmd ("pause", class_run
, set_thread_pause_cmd
, _("\
3405 Set whether the current thread is suspended while gdb has control.\n\
3406 A value of \"on\" takes effect immediately, otherwise nothing happens\n\
3407 until the next time the program is continued. This property normally\n\
3408 has no effect because the whole task is suspended, however, that may\n\
3409 be disabled with \"set task pause off\".\n\
3410 The default value is \"off\"."),
3411 &set_thread_cmd_list
);
3412 add_cmd ("pause", no_class
, show_thread_pause_cmd
, _("\
3413 Show whether the current thread is suspended while gdb has control."),
3414 &show_thread_cmd_list
);
3416 add_cmd ("run", class_run
, set_thread_run_cmd
,
3417 _("Set whether the current thread is allowed to run."),
3418 &set_thread_cmd_list
);
3419 add_cmd ("run", no_class
, show_thread_run_cmd
,
3420 _("Show whether the current thread is allowed to run."),
3421 &show_thread_cmd_list
);
3423 add_cmd ("detach-suspend-count", class_run
, set_thread_detach_sc_cmd
, _("\
3424 Set the suspend count will leave on the thread when detaching.\n\
3425 Note that this is relative to suspend count when gdb noticed the thread;\n\
3426 use the `thread takeover-suspend-count' to force it to an absolute value."),
3427 &set_thread_cmd_list
);
3428 add_cmd ("detach-suspend-count", no_class
, show_thread_detach_sc_cmd
, _("\
3429 Show the suspend count will leave on the thread when detaching.\n\
3430 Note that this is relative to suspend count when gdb noticed the thread;\n\
3431 use the `thread takeover-suspend-count' to force it to an absolute value."),
3432 &show_thread_cmd_list
);
3434 add_cmd ("exception-port", no_class
, set_thread_exc_port_cmd
, _("\
3435 Set the thread exception port to which we forward exceptions.\n\
3436 This overrides the task exception port.\n\
3437 The argument should be the value of the send right in the task."),
3438 &set_thread_cmd_list
);
3439 add_alias_cmd ("excp", "exception-port", no_class
, 1, &set_thread_cmd_list
);
3440 add_alias_cmd ("exc-port", "exception-port", no_class
, 1,
3441 &set_thread_cmd_list
);
3443 add_cmd ("takeover-suspend-count", no_class
, thread_takeover_sc_cmd
, _("\
3444 Force the threads absolute suspend-count to be gdb's.\n\
3445 Prior to giving this command, gdb's thread suspend-counts are relative\n\
3446 to the thread's initial suspend-count when gdb notices the threads."),
3452 /* -Wmissing-prototypes */
3453 extern initialize_file_ftype _initialize_gnu_nat
;
3456 _initialize_gnu_nat (void)
3458 proc_server
= getproc ();
3460 add_task_commands ();
3461 add_thread_commands ();
3462 add_setshow_boolean_cmd ("gnu-nat", class_maintenance
,
3464 _("Set debugging output for the gnu backend."),
3465 _("Show debugging output for the gnu backend."),
3473 #ifdef FLUSH_INFERIOR_CACHE
3475 /* When over-writing code on some machines the I-Cache must be flushed
3476 explicitly, because it is not kept coherent by the lazy hardware.
3477 This definitely includes breakpoints, for instance, or else we
3478 end up looping in mysterious Bpt traps. */
3481 flush_inferior_icache (CORE_ADDR pc
, int amount
)
3483 vm_machine_attribute_val_t flush
= MATTR_VAL_ICACHE_FLUSH
;
3486 ret
= vm_machine_attribute (gnu_current_inf
->task
->port
,
3491 if (ret
!= KERN_SUCCESS
)
3492 warning (_("Error flushing inferior's cache : %s"), safe_strerror (ret
));
3494 #endif /* FLUSH_INFERIOR_CACHE */