1 /* Interface GDB to the GNU Hurd.
2 Copyright (C) 1992, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2006, 2007,
3 2008, 2009, 2010 Free Software Foundation, Inc.
5 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>.
31 #include "gdb_string.h"
32 #include <sys/ptrace.h>
35 #include <mach_error.h>
36 #include <mach/exception.h>
37 #include <mach/message.h>
38 #include <mach/notify.h>
39 #include <mach/vm_attributes.h>
42 #include <hurd/interrupt.h>
44 #include <hurd/msg_request.h>
45 #include <hurd/process.h>
46 /* Defined in <hurd/process.h>, but we need forward declarations from
47 <hurd/process_request.h> as well. */
49 #include <hurd/process_request.h>
50 #include <hurd/signal.h>
51 #include <hurd/sigpreempt.h>
64 #include "gdbthread.h"
65 #include "gdb_assert.h"
66 #include "gdb_obstack.h"
69 #include "inf-child.h"
71 #include "exc_request_S.h"
73 #include "process_reply_S.h"
74 #include "msg_reply_S.h"
75 #include "exc_request_U.h"
78 static process_t proc_server = MACH_PORT_NULL;
80 /* If we've sent a proc_wait_request to the proc server, the pid of the
81 process we asked about. We can only ever have one outstanding. */
82 int proc_wait_pid = 0;
84 /* The number of wait requests we've sent, and expect replies from. */
85 int proc_waits_pending = 0;
87 int gnu_debug_flag = 0;
91 struct inf *make_inf ();
92 void inf_clear_wait (struct inf *inf);
93 void inf_cleanup (struct inf *inf);
94 void inf_startup (struct inf *inf, int pid);
95 int inf_update_suspends (struct inf *inf);
96 void inf_set_pid (struct inf *inf, pid_t pid);
97 void inf_validate_procs (struct inf *inf);
98 void inf_steal_exc_ports (struct inf *inf);
99 void inf_restore_exc_ports (struct inf *inf);
100 struct proc *inf_tid_to_proc (struct inf *inf, int tid);
101 void inf_set_threads_resume_sc (struct inf *inf,
102 struct proc *run_thread,
104 int inf_set_threads_resume_sc_for_signal_thread (struct inf *inf);
105 void inf_suspend (struct inf *inf);
106 void inf_resume (struct inf *inf);
107 void inf_set_step_thread (struct inf *inf, struct proc *proc);
108 void inf_detach (struct inf *inf);
109 void inf_attach (struct inf *inf, int pid);
110 void inf_signal (struct inf *inf, enum target_signal sig);
111 void inf_continue (struct inf *inf);
113 #define inf_debug(_inf, msg, args...) \
114 do { struct inf *__inf = (_inf); \
115 debug ("{inf %d %s}: " msg, __inf->pid, \
116 host_address_to_string (__inf) , ##args); } while (0)
118 void proc_abort (struct proc *proc, int force);
119 struct proc *make_proc (struct inf *inf, mach_port_t port, int tid);
120 struct proc *_proc_free (struct proc *proc);
121 int proc_update_sc (struct proc *proc);
122 error_t proc_get_exception_port (struct proc *proc, mach_port_t * port);
123 error_t proc_set_exception_port (struct proc *proc, mach_port_t port);
124 static mach_port_t _proc_get_exc_port (struct proc *proc);
125 void proc_steal_exc_port (struct proc *proc, mach_port_t exc_port);
126 void proc_restore_exc_port (struct proc *proc);
127 int proc_trace (struct proc *proc, int set);
129 /* Evaluate RPC_EXPR in a scope with the variables MSGPORT and REFPORT bound
130 to INF's msg port and task port respectively. If it has no msg port,
131 EIEIO is returned. INF must refer to a running process! */
132 #define INF_MSGPORT_RPC(inf, rpc_expr) \
133 HURD_MSGPORT_RPC (proc_getmsgport (proc_server, inf->pid, &msgport), \
134 (refport = inf->task->port, 0), 0, \
135 msgport ? (rpc_expr) : EIEIO)
137 /* Like INF_MSGPORT_RPC, but will also resume the signal thread to ensure
138 there's someone around to deal with the RPC (and resuspend things
139 afterwards). This effects INF's threads' resume_sc count. */
140 #define INF_RESUME_MSGPORT_RPC(inf, rpc_expr) \
141 (inf_set_threads_resume_sc_for_signal_thread (inf) \
144 __e = INF_MSGPORT_RPC (inf, rpc_expr); \
150 /* The state passed by an exception message. */
153 int exception; /* The exception code */
155 mach_port_t handler; /* The real exception port to handle this. */
156 mach_port_t reply; /* The reply port from the exception call. */
159 /* The results of the last wait an inf did. */
162 struct target_waitstatus status; /* The status returned to gdb. */
163 struct exc_state exc; /* The exception that caused us to return. */
164 struct proc *thread; /* The thread in question. */
165 int suppress; /* Something trivial happened. */
168 /* The state of an inferior. */
171 /* Fields describing the current inferior. */
173 struct proc *task; /* The mach task. */
174 struct proc *threads; /* A linked list of all threads in TASK. */
176 /* True if THREADS needn't be validated by querying the task. We assume that
177 we and the task in question are the only ones frobbing the thread list,
178 so as long as we don't let any code run, we don't have to worry about
180 int threads_up_to_date;
182 pid_t pid; /* The real system PID. */
184 struct inf_wait wait; /* What to return from target_wait. */
186 /* One thread proc in INF may be in `single-stepping mode'. This is it. */
187 struct proc *step_thread;
189 /* The thread we think is the signal thread. */
190 struct proc *signal_thread;
192 mach_port_t event_port; /* Where we receive various msgs. */
194 /* True if we think at least one thread in the inferior could currently be
196 unsigned int running:1;
198 /* True if the process has stopped (in the proc server sense). Note that
199 since a proc server `stop' leaves the signal thread running, the inf can
200 be RUNNING && STOPPED... */
201 unsigned int stopped:1;
203 /* True if the inferior has no message port. */
204 unsigned int nomsg:1;
206 /* True if the inferior is traced. */
207 unsigned int traced:1;
209 /* True if we shouldn't try waiting for the inferior, usually because we
210 can't for some reason. */
211 unsigned int no_wait:1;
213 /* When starting a new inferior, we don't try to validate threads until all
214 the proper execs have been done. This is a count of how many execs we
216 unsigned pending_execs;
218 /* Fields describing global state */
220 /* The task suspend count used when gdb has control. This is normally 1 to
221 make things easier for us, but sometimes (like when attaching to vital
222 system servers) it may be desirable to let the task continue to run
223 (pausing individual threads as necessary). */
226 /* The task suspend count left when detaching from a task. */
229 /* The initial values used for the run_sc and pause_sc of newly discovered
230 threads -- see the definition of those fields in struct proc. */
231 int default_thread_run_sc;
232 int default_thread_pause_sc;
233 int default_thread_detach_sc;
235 /* True if the process should be traced when started/attached. Newly
236 started processes *must* be traced at first to exec them properly, but
237 if this is false, tracing is turned off as soon it has done so. */
240 /* True if exceptions from the inferior process should be trapped. This
241 must be on to use breakpoints. */
247 __proc_pid (struct proc *proc)
249 return proc->inf->pid;
253 /* Update PROC's real suspend count to match it's desired one. Returns true
254 if we think PROC is now in a runnable state. */
256 proc_update_sc (struct proc *proc)
260 int delta = proc->sc - proc->cur_sc;
263 proc_debug (proc, "sc: %d --> %d", proc->cur_sc, proc->sc);
265 if (proc->sc == 0 && proc->state_changed)
266 /* Since PROC may start running, we must write back any state changes. */
268 gdb_assert (proc_is_thread (proc));
269 proc_debug (proc, "storing back changed thread state");
270 err = thread_set_state (proc->port, THREAD_STATE_FLAVOR,
271 (thread_state_t) &proc->state, THREAD_STATE_SIZE);
273 proc->state_changed = 0;
278 while (delta-- > 0 && !err)
280 if (proc_is_task (proc))
281 err = task_suspend (proc->port);
283 err = thread_suspend (proc->port);
288 while (delta++ < 0 && !err)
290 if (proc_is_task (proc))
291 err = task_resume (proc->port);
293 err = thread_resume (proc->port);
297 proc->cur_sc = proc->sc;
299 /* If we got an error, then the task/thread has disappeared. */
300 running = !err && proc->sc == 0;
302 proc_debug (proc, "is %s", err ? "dead" : running ? "running" : "suspended");
304 proc_debug (proc, "err = %s", safe_strerror (err));
309 proc->state_valid = proc->state_changed = 0;
310 proc->fetched_regs = 0;
317 /* Thread_abort is called on PROC if needed. PROC must be a thread proc.
318 If PROC is deemed `precious', then nothing is done unless FORCE is true.
319 In particular, a thread is precious if it's running (in which case forcing
320 it includes suspending it first), or if it has an exception pending. */
322 proc_abort (struct proc *proc, int force)
324 gdb_assert (proc_is_thread (proc));
328 struct inf *inf = proc->inf;
329 int running = (proc->cur_sc == 0 && inf->task->cur_sc == 0);
331 if (running && force)
334 inf_update_suspends (proc->inf);
336 warning (_("Stopped %s."), proc_string (proc));
338 else if (proc == inf->wait.thread && inf->wait.exc.reply && !force)
339 /* An exception is pending on PROC, which don't mess with. */
343 /* We only abort the thread if it's not actually running. */
345 thread_abort (proc->port);
346 proc_debug (proc, "aborted");
350 proc_debug (proc, "not aborting");
354 /* Make sure that the state field in PROC is up to date, and return a pointer
355 to it, or 0 if something is wrong. If WILL_MODIFY is true, makes sure
356 that the thread is stopped and aborted first, and sets the state_changed
357 field in PROC to true. */
359 proc_get_state (struct proc *proc, int will_modify)
361 int was_aborted = proc->aborted;
363 proc_debug (proc, "updating state info%s",
364 will_modify ? " (with intention to modify)" : "");
366 proc_abort (proc, will_modify);
368 if (!was_aborted && proc->aborted)
369 /* PROC's state may have changed since we last fetched it. */
370 proc->state_valid = 0;
372 if (!proc->state_valid)
374 mach_msg_type_number_t state_size = THREAD_STATE_SIZE;
376 thread_get_state (proc->port, THREAD_STATE_FLAVOR,
377 (thread_state_t) &proc->state, &state_size);
378 proc_debug (proc, "getting thread state");
379 proc->state_valid = !err;
382 if (proc->state_valid)
385 proc->state_changed = 1;
386 return (thread_state_t) &proc->state;
393 /* Set PORT to PROC's exception port. */
395 proc_get_exception_port (struct proc * proc, mach_port_t * port)
397 if (proc_is_task (proc))
398 return task_get_exception_port (proc->port, port);
400 return thread_get_exception_port (proc->port, port);
403 /* Set PROC's exception port to PORT. */
405 proc_set_exception_port (struct proc * proc, mach_port_t port)
407 proc_debug (proc, "setting exception port: %d", port);
408 if (proc_is_task (proc))
409 return task_set_exception_port (proc->port, port);
411 return thread_set_exception_port (proc->port, port);
414 /* Get PROC's exception port, cleaning up a bit if proc has died. */
416 _proc_get_exc_port (struct proc *proc)
418 mach_port_t exc_port;
419 error_t err = proc_get_exception_port (proc, &exc_port);
422 /* PROC must be dead. */
425 mach_port_deallocate (mach_task_self (), proc->exc_port);
426 proc->exc_port = MACH_PORT_NULL;
427 if (proc->saved_exc_port)
428 mach_port_deallocate (mach_task_self (), proc->saved_exc_port);
429 proc->saved_exc_port = MACH_PORT_NULL;
435 /* Replace PROC's exception port with EXC_PORT, unless it's already been
436 done. Stash away any existing exception port so we can restore it later. */
438 proc_steal_exc_port (struct proc *proc, mach_port_t exc_port)
440 mach_port_t cur_exc_port = _proc_get_exc_port (proc);
446 proc_debug (proc, "inserting exception port: %d", exc_port);
448 if (cur_exc_port != exc_port)
449 /* Put in our exception port. */
450 err = proc_set_exception_port (proc, exc_port);
452 if (err || cur_exc_port == proc->exc_port)
453 /* We previously set the exception port, and it's still set. So we
454 just keep the old saved port which is what the proc set. */
457 mach_port_deallocate (mach_task_self (), cur_exc_port);
460 /* Keep a copy of PROC's old exception port so it can be restored. */
462 if (proc->saved_exc_port)
463 mach_port_deallocate (mach_task_self (), proc->saved_exc_port);
464 proc->saved_exc_port = cur_exc_port;
467 proc_debug (proc, "saved exception port: %d", proc->saved_exc_port);
470 proc->exc_port = exc_port;
472 warning (_("Error setting exception port for %s: %s"),
473 proc_string (proc), safe_strerror (err));
477 /* If we previously replaced PROC's exception port, put back what we
478 found there at the time, unless *our* exception port has since been
479 overwritten, in which case who knows what's going on. */
481 proc_restore_exc_port (struct proc *proc)
483 mach_port_t cur_exc_port = _proc_get_exc_port (proc);
489 proc_debug (proc, "restoring real exception port");
491 if (proc->exc_port == cur_exc_port)
492 /* Our's is still there. */
493 err = proc_set_exception_port (proc, proc->saved_exc_port);
495 if (proc->saved_exc_port)
496 mach_port_deallocate (mach_task_self (), proc->saved_exc_port);
497 proc->saved_exc_port = MACH_PORT_NULL;
500 proc->exc_port = MACH_PORT_NULL;
502 warning (_("Error setting exception port for %s: %s"),
503 proc_string (proc), safe_strerror (err));
508 /* Turns hardware tracing in PROC on or off when SET is true or false,
509 respectively. Returns true on success. */
511 proc_trace (struct proc *proc, int set)
513 thread_state_t state = proc_get_state (proc, 1);
516 return 0; /* the thread must be dead. */
518 proc_debug (proc, "tracing %s", set ? "on" : "off");
522 /* XXX We don't get the exception unless the thread has its own
523 exception port???? */
524 if (proc->exc_port == MACH_PORT_NULL)
525 proc_steal_exc_port (proc, proc->inf->event_port);
526 THREAD_STATE_SET_TRACED (state);
529 THREAD_STATE_CLEAR_TRACED (state);
535 /* A variable from which to assign new TIDs. */
536 static int next_thread_id = 1;
538 /* Returns a new proc structure with the given fields. Also adds a
539 notification for PORT becoming dead to be sent to INF's notify port. */
541 make_proc (struct inf *inf, mach_port_t port, int tid)
544 mach_port_t prev_port = MACH_PORT_NULL;
545 struct proc *proc = xmalloc (sizeof (struct proc));
551 proc->saved_exc_port = MACH_PORT_NULL;
552 proc->exc_port = MACH_PORT_NULL;
557 /* Note that these are all the values for threads; the task simply uses the
558 corresponding field in INF directly. */
559 proc->run_sc = inf->default_thread_run_sc;
560 proc->pause_sc = inf->default_thread_pause_sc;
561 proc->detach_sc = inf->default_thread_detach_sc;
562 proc->resume_sc = proc->run_sc;
566 proc->state_valid = 0;
567 proc->state_changed = 0;
569 proc_debug (proc, "is new");
571 /* Get notified when things die. */
573 mach_port_request_notification (mach_task_self (), port,
574 MACH_NOTIFY_DEAD_NAME, 1,
576 MACH_MSG_TYPE_MAKE_SEND_ONCE,
579 warning (_("Couldn't request notification for port %d: %s"),
580 port, safe_strerror (err));
583 proc_debug (proc, "notifications to: %d", inf->event_port);
584 if (prev_port != MACH_PORT_NULL)
585 mach_port_deallocate (mach_task_self (), prev_port);
588 if (inf->want_exceptions)
590 if (proc_is_task (proc))
591 /* Make the task exception port point to us. */
592 proc_steal_exc_port (proc, inf->event_port);
594 /* Just clear thread exception ports -- they default to the
596 proc_steal_exc_port (proc, MACH_PORT_NULL);
602 /* Frees PROC and any resources it uses, and returns the value of PROC's
605 _proc_free (struct proc *proc)
607 struct inf *inf = proc->inf;
608 struct proc *next = proc->next;
610 proc_debug (proc, "freeing...");
612 if (proc == inf->step_thread)
613 /* Turn off single stepping. */
614 inf_set_step_thread (inf, 0);
615 if (proc == inf->wait.thread)
616 inf_clear_wait (inf);
617 if (proc == inf->signal_thread)
618 inf->signal_thread = 0;
620 if (proc->port != MACH_PORT_NULL)
622 if (proc->exc_port != MACH_PORT_NULL)
623 /* Restore the original exception port. */
624 proc_restore_exc_port (proc);
625 if (proc->cur_sc != 0)
626 /* Resume the thread/task. */
629 proc_update_sc (proc);
631 mach_port_deallocate (mach_task_self (), proc->port);
642 struct inf *inf = xmalloc (sizeof (struct inf));
646 inf->threads_up_to_date = 0;
648 inf->wait.status.kind = TARGET_WAITKIND_SPURIOUS;
649 inf->wait.thread = 0;
650 inf->wait.exc.handler = MACH_PORT_NULL;
651 inf->wait.exc.reply = MACH_PORT_NULL;
652 inf->step_thread = 0;
653 inf->signal_thread = 0;
654 inf->event_port = MACH_PORT_NULL;
660 inf->pending_execs = 0;
663 inf->default_thread_run_sc = 0;
664 inf->default_thread_pause_sc = 0;
665 inf->default_thread_detach_sc = 0;
666 inf->want_signals = 1; /* By default */
667 inf->want_exceptions = 1; /* By default */
672 /* Clear INF's target wait status. */
674 inf_clear_wait (struct inf *inf)
676 inf_debug (inf, "clearing wait");
677 inf->wait.status.kind = TARGET_WAITKIND_SPURIOUS;
678 inf->wait.thread = 0;
679 inf->wait.suppress = 0;
680 if (inf->wait.exc.handler != MACH_PORT_NULL)
682 mach_port_deallocate (mach_task_self (), inf->wait.exc.handler);
683 inf->wait.exc.handler = MACH_PORT_NULL;
685 if (inf->wait.exc.reply != MACH_PORT_NULL)
687 mach_port_deallocate (mach_task_self (), inf->wait.exc.reply);
688 inf->wait.exc.reply = MACH_PORT_NULL;
694 inf_cleanup (struct inf *inf)
696 inf_debug (inf, "cleanup");
698 inf_clear_wait (inf);
700 inf_set_pid (inf, -1);
707 inf->pending_execs = 0;
711 mach_port_destroy (mach_task_self (), inf->event_port);
712 inf->event_port = MACH_PORT_NULL;
717 inf_startup (struct inf *inf, int pid)
721 inf_debug (inf, "startup: pid = %d", pid);
725 /* Make the port on which we receive all events. */
726 err = mach_port_allocate (mach_task_self (),
727 MACH_PORT_RIGHT_RECEIVE, &inf->event_port);
729 error (_("Error allocating event port: %s"), safe_strerror (err));
731 /* Make a send right for it, so we can easily copy it for other people. */
732 mach_port_insert_right (mach_task_self (), inf->event_port,
733 inf->event_port, MACH_MSG_TYPE_MAKE_SEND);
734 inf_set_pid (inf, pid);
738 /* Close current process, if any, and attach INF to process PORT. */
740 inf_set_pid (struct inf *inf, pid_t pid)
743 struct proc *task = inf->task;
745 inf_debug (inf, "setting pid: %d", pid);
748 task_port = MACH_PORT_NULL;
751 error_t err = proc_pid2task (proc_server, pid, &task_port);
753 error (_("Error getting task for pid %d: %s"), pid, safe_strerror (err));
756 inf_debug (inf, "setting task: %d", task_port);
759 task_suspend (task_port);
761 if (task && task->port != task_port)
764 inf_validate_procs (inf); /* Trash all the threads. */
765 _proc_free (task); /* And the task. */
768 if (task_port != MACH_PORT_NULL)
770 inf->task = make_proc (inf, task_port, PROC_TID_TASK);
771 inf->threads_up_to_date = 0;
778 /* Reflect task_suspend above. */
779 inf->task->sc = inf->task->cur_sc = 1;
786 /* Validates INF's stopped, nomsg and traced field from the actual
787 proc server state. Note that the traced field is only updated from
788 the proc server state if we do not have a message port. If we do
789 have a message port we'd better look at the tracemask itself. */
791 inf_validate_procinfo (struct inf *inf)
794 mach_msg_type_number_t noise_len = 0;
796 mach_msg_type_number_t pi_len = 0;
799 proc_getprocinfo (proc_server, inf->pid, &info_flags,
800 (procinfo_t *) &pi, &pi_len, &noise, &noise_len);
804 inf->stopped = !!(pi->state & PI_STOPPED);
805 inf->nomsg = !!(pi->state & PI_NOMSG);
807 inf->traced = !!(pi->state & PI_TRACED);
808 vm_deallocate (mach_task_self (), (vm_address_t) pi, pi_len);
810 vm_deallocate (mach_task_self (), (vm_address_t) noise, noise_len);
814 /* Validates INF's task suspend count. If it's higher than we expect,
815 verify with the user before `stealing' the extra count. */
817 inf_validate_task_sc (struct inf *inf)
820 mach_msg_type_number_t noise_len = 0;
822 mach_msg_type_number_t pi_len = 0;
823 int info_flags = PI_FETCH_TASKINFO;
824 int suspend_count = -1;
828 err = proc_getprocinfo (proc_server, inf->pid, &info_flags,
829 (procinfo_t *) &pi, &pi_len, &noise, &noise_len);
832 inf->task->dead = 1; /* oh well */
836 if (inf->task->cur_sc < pi->taskinfo.suspend_count && suspend_count == -1)
838 /* The proc server might have suspended the task while stopping
839 it. This happens when the task is handling a traced signal.
840 Refetch the suspend count. The proc server should be
841 finished stopping the task by now. */
842 suspend_count = pi->taskinfo.suspend_count;
846 suspend_count = pi->taskinfo.suspend_count;
848 vm_deallocate (mach_task_self (), (vm_address_t) pi, pi_len);
850 vm_deallocate (mach_task_self (), (vm_address_t) pi, pi_len);
852 if (inf->task->cur_sc < suspend_count)
856 target_terminal_ours (); /* Allow I/O. */
857 abort = !query (_("Pid %d has an additional task suspend count of %d;"
858 " clear it? "), inf->pid,
859 suspend_count - inf->task->cur_sc);
860 target_terminal_inferior (); /* Give it back to the child. */
863 error (_("Additional task suspend count left untouched."));
865 inf->task->cur_sc = suspend_count;
869 /* Turns tracing for INF on or off, depending on ON, unless it already
870 is. If INF is running, the resume_sc count of INF's threads will
871 be modified, and the signal thread will briefly be run to change
874 inf_set_traced (struct inf *inf, int on)
876 if (on == inf->traced)
879 if (inf->task && !inf->task->dead)
880 /* Make it take effect immediately. */
882 sigset_t mask = on ? ~(sigset_t) 0 : 0;
884 INF_RESUME_MSGPORT_RPC (inf, msg_set_init_int (msgport, refport,
885 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;
912 /* We don't have to update INF->threads even though we're iterating over it
913 because we'll change a thread only if it already has an existing proc
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;
978 if (thread->port == port)
981 thread = thread->next;
986 /* Make INF's list of threads be consistent with reality of TASK. */
988 inf_validate_procs (struct inf *inf)
990 thread_array_t threads;
991 mach_msg_type_number_t num_threads, i;
992 struct proc *task = inf->task;
994 /* If no threads are currently running, this function will guarantee that
995 things are up to date. The exception is if there are zero threads --
996 then it is almost certainly in an odd state, and probably some outside
997 agent will create threads. */
998 inf->threads_up_to_date = inf->threads ? !inf->running : 0;
1002 error_t err = task_threads (task->port, &threads, &num_threads);
1003 inf_debug (inf, "fetching threads");
1005 /* TASK must be dead. */
1015 inf_debug (inf, "no task");
1019 /* Make things normally linear. */
1020 mach_msg_type_number_t search_start = 0;
1021 /* Which thread in PROCS corresponds to each task thread, & the task. */
1022 struct proc *matched[num_threads + 1];
1023 /* The last thread in INF->threads, so we can add to the end. */
1024 struct proc *last = 0;
1025 /* The current thread we're considering. */
1026 struct proc *thread = inf->threads;
1028 memset (matched, 0, sizeof (matched));
1032 mach_msg_type_number_t left;
1034 for (i = search_start, left = num_threads; left; i++, left--)
1036 if (i >= num_threads)
1037 i -= num_threads; /* I wrapped around. */
1038 if (thread->port == threads[i])
1039 /* We already know about this thread. */
1041 matched[i] = thread;
1043 thread = thread->next;
1051 proc_debug (thread, "died!");
1052 thread->port = MACH_PORT_NULL;
1053 thread = _proc_free (thread); /* THREAD is dead. */
1055 last->next = thread;
1057 inf->threads = thread;
1061 for (i = 0; i < num_threads; i++)
1064 /* Throw away the duplicate send right. */
1065 mach_port_deallocate (mach_task_self (), threads[i]);
1067 /* THREADS[I] is a thread we don't know about yet! */
1071 thread = make_proc (inf, threads[i], next_thread_id++);
1073 last->next = thread;
1075 inf->threads = thread;
1077 proc_debug (thread, "new thread: %d", threads[i]);
1079 ptid = ptid_build (inf->pid, 0, thread->tid);
1081 /* Tell GDB's generic thread code. */
1083 if (ptid_equal (inferior_ptid, pid_to_ptid (inf->pid)))
1084 /* This is the first time we're hearing about thread
1085 ids, after a fork-child. */
1086 thread_change_ptid (inferior_ptid, ptid);
1087 else if (inf->pending_execs != 0)
1088 /* This is a shell thread. */
1089 add_thread_silent (ptid);
1095 vm_deallocate (mach_task_self (),
1096 (vm_address_t) threads, (num_threads * sizeof (thread_t)));
1101 /* Makes sure that INF's thread list is synced with the actual process. */
1103 inf_update_procs (struct inf *inf)
1107 if (!inf->threads_up_to_date)
1108 inf_validate_procs (inf);
1112 /* Sets the resume_sc of each thread in inf. That of RUN_THREAD is set to 0,
1113 and others are set to their run_sc if RUN_OTHERS is true, and otherwise
1116 inf_set_threads_resume_sc (struct inf *inf,
1117 struct proc *run_thread, int run_others)
1119 struct proc *thread;
1120 inf_update_procs (inf);
1121 for (thread = inf->threads; thread; thread = thread->next)
1122 if (thread == run_thread)
1123 thread->resume_sc = 0;
1124 else if (run_others)
1125 thread->resume_sc = thread->run_sc;
1127 thread->resume_sc = thread->pause_sc;
1131 /* Cause INF to continue execution immediately; individual threads may still
1132 be suspended (but their suspend counts will be updated). */
1134 inf_resume (struct inf *inf)
1136 struct proc *thread;
1138 inf_update_procs (inf);
1140 for (thread = inf->threads; thread; thread = thread->next)
1141 thread->sc = thread->resume_sc;
1145 if (!inf->pending_execs)
1146 /* Try to make sure our task count is correct -- in the case where
1147 we're waiting for an exec though, things are too volatile, so just
1148 assume things will be reasonable (which they usually will be). */
1149 inf_validate_task_sc (inf);
1153 inf_update_suspends (inf);
1156 /* Cause INF to stop execution immediately; individual threads may still
1159 inf_suspend (struct inf *inf)
1161 struct proc *thread;
1163 inf_update_procs (inf);
1165 for (thread = inf->threads; thread; thread = thread->next)
1166 thread->sc = thread->pause_sc;
1169 inf->task->sc = inf->pause_sc;
1171 inf_update_suspends (inf);
1175 /* INF has one thread PROC that is in single-stepping mode. This
1176 function changes it to be PROC, changing any old step_thread to be
1177 a normal one. A PROC of 0 clears any existing value. */
1179 inf_set_step_thread (struct inf *inf, struct proc *thread)
1181 gdb_assert (!thread || proc_is_thread (thread));
1184 inf_debug (inf, "setting step thread: %d/%d", inf->pid, thread->tid);
1186 inf_debug (inf, "clearing step thread");
1188 if (inf->step_thread != thread)
1190 if (inf->step_thread && inf->step_thread->port != MACH_PORT_NULL)
1191 if (!proc_trace (inf->step_thread, 0))
1193 if (thread && proc_trace (thread, 1))
1194 inf->step_thread = thread;
1196 inf->step_thread = 0;
1201 /* Set up the thread resume_sc's so that only the signal thread is running
1202 (plus whatever other thread are set to always run). Returns true if we
1203 did so, or false if we can't find a signal thread. */
1205 inf_set_threads_resume_sc_for_signal_thread (struct inf *inf)
1207 if (inf->signal_thread)
1209 inf_set_threads_resume_sc (inf, inf->signal_thread, 0);
1217 inf_update_signal_thread (struct inf *inf)
1219 /* XXX for now we assume that if there's a msgport, the 2nd thread is
1220 the signal thread. */
1221 inf->signal_thread = inf->threads ? inf->threads->next : 0;
1225 /* Detachs from INF's inferior task, letting it run once again... */
1227 inf_detach (struct inf *inf)
1229 struct proc *task = inf->task;
1231 inf_debug (inf, "detaching...");
1233 inf_clear_wait (inf);
1234 inf_set_step_thread (inf, 0);
1238 struct proc *thread;
1240 inf_validate_procinfo (inf);
1242 inf_set_traced (inf, 0);
1248 inf_signal (inf, TARGET_SIGNAL_0);
1251 proc_restore_exc_port (task);
1252 task->sc = inf->detach_sc;
1254 for (thread = inf->threads; thread; thread = thread->next)
1256 proc_restore_exc_port (thread);
1257 thread->sc = thread->detach_sc;
1260 inf_update_suspends (inf);
1266 /* Attaches INF to the process with process id PID, returning it in a
1267 suspended state suitable for debugging. */
1269 inf_attach (struct inf *inf, int pid)
1271 inf_debug (inf, "attaching: %d", pid);
1276 inf_startup (inf, pid);
1280 /* Makes sure that we've got our exception ports entrenched in the process. */
1282 inf_steal_exc_ports (struct inf *inf)
1284 struct proc *thread;
1286 inf_debug (inf, "stealing exception ports");
1288 inf_set_step_thread (inf, 0); /* The step thread is special. */
1290 proc_steal_exc_port (inf->task, inf->event_port);
1291 for (thread = inf->threads; thread; thread = thread->next)
1292 proc_steal_exc_port (thread, MACH_PORT_NULL);
1295 /* Makes sure the process has its own exception ports. */
1297 inf_restore_exc_ports (struct inf *inf)
1299 struct proc *thread;
1301 inf_debug (inf, "restoring exception ports");
1303 inf_set_step_thread (inf, 0); /* The step thread is special. */
1305 proc_restore_exc_port (inf->task);
1306 for (thread = inf->threads; thread; thread = thread->next)
1307 proc_restore_exc_port (thread);
1311 /* Deliver signal SIG to INF. If INF is stopped, delivering a signal, even
1312 signal 0, will continue it. INF is assumed to be in a paused state, and
1313 the resume_sc's of INF's threads may be affected. */
1315 inf_signal (struct inf *inf, enum target_signal sig)
1318 int host_sig = target_signal_to_host (sig);
1320 #define NAME target_signal_to_name (sig)
1322 if (host_sig >= _NSIG)
1323 /* A mach exception. Exceptions are encoded in the signal space by
1324 putting them after _NSIG; this assumes they're positive (and not
1325 extremely large)! */
1327 struct inf_wait *w = &inf->wait;
1328 if (w->status.kind == TARGET_WAITKIND_STOPPED
1329 && w->status.value.sig == sig
1330 && w->thread && !w->thread->aborted)
1331 /* We're passing through the last exception we received. This is
1332 kind of bogus, because exceptions are per-thread whereas gdb
1333 treats signals as per-process. We just forward the exception to
1334 the correct handler, even it's not for the same thread as TID --
1335 i.e., we pretend it's global. */
1337 struct exc_state *e = &w->exc;
1338 inf_debug (inf, "passing through exception:"
1339 " task = %d, thread = %d, exc = %d"
1340 ", code = %d, subcode = %d",
1341 w->thread->port, inf->task->port,
1342 e->exception, e->code, e->subcode);
1344 exception_raise_request (e->handler,
1345 e->reply, MACH_MSG_TYPE_MOVE_SEND_ONCE,
1346 w->thread->port, inf->task->port,
1347 e->exception, e->code, e->subcode);
1350 error (_("Can't forward spontaneous exception (%s)."), NAME);
1353 /* A Unix signal. */
1355 /* The process is stopped and expecting a signal. Just send off a
1356 request and let it get handled when we resume everything. */
1358 inf_debug (inf, "sending %s to stopped process", NAME);
1360 INF_MSGPORT_RPC (inf,
1361 msg_sig_post_untraced_request (msgport,
1363 MACH_MSG_TYPE_MAKE_SEND_ONCE,
1367 /* Posting an untraced signal automatically continues it.
1368 We clear this here rather than when we get the reply
1369 because we'd rather assume it's not stopped when it
1370 actually is, than the reverse. */
1374 /* It's not expecting it. We have to let just the signal thread
1375 run, and wait for it to get into a reasonable state before we
1376 can continue the rest of the process. When we finally resume the
1377 process the signal we request will be the very first thing that
1380 inf_debug (inf, "sending %s to unstopped process"
1381 " (so resuming signal thread)", NAME);
1383 INF_RESUME_MSGPORT_RPC (inf,
1384 msg_sig_post_untraced (msgport, host_sig,
1389 /* Can't do too much... */
1390 warning (_("Can't deliver signal %s: No signal thread."), NAME);
1392 warning (_("Delivering signal %s: %s"), NAME, safe_strerror (err));
1398 /* Continue INF without delivering a signal. This is meant to be used
1399 when INF does not have a message port. */
1401 inf_continue (struct inf *inf)
1404 error_t err = proc_pid2proc (proc_server, inf->pid, &proc);
1408 inf_debug (inf, "continuing process");
1410 err = proc_mark_cont (proc);
1413 struct proc *thread;
1415 for (thread = inf->threads; thread; thread = thread->next)
1416 thread_resume (thread->port);
1423 warning (_("Can't continue process: %s"), safe_strerror (err));
1427 /* The inferior used for all gdb target ops. */
1428 struct inf *gnu_current_inf = 0;
1430 /* The inferior being waited for by gnu_wait. Since GDB is decidely not
1431 multi-threaded, we don't bother to lock this. */
1432 struct inf *waiting_inf;
1434 /* Wait for something to happen in the inferior, returning what in STATUS. */
1436 gnu_wait (struct target_ops *ops,
1437 ptid_t ptid, struct target_waitstatus *status, int options)
1441 mach_msg_header_t hdr;
1442 mach_msg_type_t type;
1446 struct proc *thread;
1447 struct inf *inf = gnu_current_inf;
1449 extern int exc_server (mach_msg_header_t *, mach_msg_header_t *);
1450 extern int msg_reply_server (mach_msg_header_t *, mach_msg_header_t *);
1451 extern int notify_server (mach_msg_header_t *, mach_msg_header_t *);
1452 extern int process_reply_server (mach_msg_header_t *, mach_msg_header_t *);
1454 gdb_assert (inf->task);
1456 if (!inf->threads && !inf->pending_execs)
1457 /* No threads! Assume that maybe some outside agency is frobbing our
1458 task, and really look for new threads. If we can't find any, just tell
1459 the user to try again later. */
1461 inf_validate_procs (inf);
1462 if (!inf->threads && !inf->task->dead)
1463 error (_("There are no threads; try again later."));
1468 inf_debug (inf, "waiting for: %s", target_pid_to_str (ptid));
1471 if (proc_wait_pid != inf->pid && !inf->no_wait)
1472 /* Always get information on events from the proc server. */
1474 inf_debug (inf, "requesting wait on pid %d", inf->pid);
1477 /* The proc server is single-threaded, and only allows a single
1478 outstanding wait request, so we have to cancel the previous one. */
1480 inf_debug (inf, "cancelling previous wait on pid %d", proc_wait_pid);
1481 interrupt_operation (proc_server, 0);
1485 proc_wait_request (proc_server, inf->event_port, inf->pid, WUNTRACED);
1487 warning (_("wait request failed: %s"), safe_strerror (err));
1490 inf_debug (inf, "waits pending: %d", proc_waits_pending);
1491 proc_wait_pid = inf->pid;
1492 /* Even if proc_waits_pending was > 0 before, we still won't
1493 get any other replies, because it was either from a
1494 different INF, or a different process attached to INF --
1495 and the event port, which is the wait reply port, changes
1496 when you switch processes. */
1497 proc_waits_pending = 1;
1501 inf_clear_wait (inf);
1503 /* What can happen? (1) Dead name notification; (2) Exceptions arrive;
1504 (3) wait reply from the proc server. */
1506 inf_debug (inf, "waiting for an event...");
1507 err = mach_msg (&msg.hdr, MACH_RCV_MSG | MACH_RCV_INTERRUPT,
1508 0, sizeof (struct msg), inf->event_port,
1509 MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
1511 /* Re-suspend the task. */
1514 if (!inf->task && inf->pending_execs)
1515 /* When doing an exec, it's possible that the old task wasn't reused
1516 (e.g., setuid execs). So if the task seems to have disappeared,
1517 attempt to refetch it, as the pid should still be the same. */
1518 inf_set_pid (inf, inf->pid);
1520 if (err == EMACH_RCV_INTERRUPTED)
1521 inf_debug (inf, "interrupted");
1523 error (_("Couldn't wait for an event: %s"), safe_strerror (err));
1528 mach_msg_header_t hdr;
1529 mach_msg_type_t err_type;
1535 inf_debug (inf, "event: msgid = %d", msg.hdr.msgh_id);
1537 /* Handle what we got. */
1538 if (!notify_server (&msg.hdr, &reply.hdr)
1539 && !exc_server (&msg.hdr, &reply.hdr)
1540 && !process_reply_server (&msg.hdr, &reply.hdr)
1541 && !msg_reply_server (&msg.hdr, &reply.hdr))
1542 /* Whatever it is, it's something strange. */
1543 error (_("Got a strange event, msg id = %d."), msg.hdr.msgh_id);
1546 error (_("Handling event, msgid = %d: %s"),
1547 msg.hdr.msgh_id, safe_strerror (reply.err));
1550 if (inf->pending_execs)
1551 /* We're waiting for the inferior to finish execing. */
1553 struct inf_wait *w = &inf->wait;
1554 enum target_waitkind kind = w->status.kind;
1556 if (kind == TARGET_WAITKIND_SPURIOUS)
1557 /* Since gdb is actually counting the number of times the inferior
1558 stops, expecting one stop per exec, we only return major events
1562 inf_debug (inf, "pending_execs = %d, ignoring minor event",
1563 inf->pending_execs);
1565 else if (kind == TARGET_WAITKIND_STOPPED
1566 && w->status.value.sig == TARGET_SIGNAL_TRAP)
1567 /* Ah hah! A SIGTRAP from the inferior while starting up probably
1568 means we've succesfully completed an exec! */
1570 if (--inf->pending_execs == 0)
1573 #if 0 /* do we need this? */
1574 prune_threads (1); /* Get rid of the old shell threads */
1575 renumber_threads (0); /* Give our threads reasonable names. */
1578 inf_debug (inf, "pending exec completed, pending_execs => %d",
1579 inf->pending_execs);
1581 else if (kind == TARGET_WAITKIND_STOPPED)
1582 /* It's possible that this signal is because of a crashed process
1583 being handled by the hurd crash server; in this case, the process
1584 will have an extra task suspend, which we need to know about.
1585 Since the code in inf_resume that normally checks for this is
1586 disabled while INF->pending_execs, we do the check here instead. */
1587 inf_validate_task_sc (inf);
1590 if (inf->wait.suppress)
1591 /* Some totally spurious event happened that we don't consider
1592 worth returning to gdb. Just keep waiting. */
1594 inf_debug (inf, "suppressing return, rewaiting...");
1599 /* Pass back out our results. */
1600 memcpy (status, &inf->wait.status, sizeof (*status));
1602 thread = inf->wait.thread;
1604 ptid = ptid_build (inf->pid, 0, thread->tid);
1605 else if (ptid_equal (ptid, minus_one_ptid))
1606 thread = inf_tid_to_thread (inf, -1);
1608 thread = inf_tid_to_thread (inf, ptid_get_tid (ptid));
1610 if (!thread || thread->port == MACH_PORT_NULL)
1612 /* TID is dead; try and find a new thread. */
1613 if (inf_update_procs (inf) && inf->threads)
1614 ptid = ptid_build (inf->pid, 0, inf->threads->tid); /* The first available thread. */
1616 ptid = inferior_ptid; /* let wait_for_inferior handle exit case */
1620 && !ptid_equal (ptid, minus_one_ptid)
1621 && status->kind != TARGET_WAITKIND_SPURIOUS
1622 && inf->pause_sc == 0 && thread->pause_sc == 0)
1623 /* If something actually happened to THREAD, make sure we
1627 inf_update_suspends (inf);
1630 inf_debug (inf, "returning ptid = %s, status = %s (%d)",
1631 target_pid_to_str (ptid),
1632 status->kind == TARGET_WAITKIND_EXITED ? "EXITED"
1633 : status->kind == TARGET_WAITKIND_STOPPED ? "STOPPED"
1634 : status->kind == TARGET_WAITKIND_SIGNALLED ? "SIGNALLED"
1635 : status->kind == TARGET_WAITKIND_LOADED ? "LOADED"
1636 : status->kind == TARGET_WAITKIND_SPURIOUS ? "SPURIOUS"
1638 status->value.integer);
1644 /* The rpc handler called by exc_server. */
1646 S_exception_raise_request (mach_port_t port, mach_port_t reply_port,
1647 thread_t thread_port, task_t task_port,
1648 int exception, int code, int subcode)
1650 struct inf *inf = waiting_inf;
1651 struct proc *thread = inf_port_to_thread (inf, thread_port);
1653 inf_debug (waiting_inf,
1654 "thread = %d, task = %d, exc = %d, code = %d, subcode = %d",
1655 thread_port, task_port, exception, code, subcode);
1658 /* We don't know about thread? */
1660 inf_update_procs (inf);
1661 thread = inf_port_to_thread (inf, thread_port);
1663 /* Give up, the generating thread is gone. */
1667 mach_port_deallocate (mach_task_self (), thread_port);
1668 mach_port_deallocate (mach_task_self (), task_port);
1670 if (!thread->aborted)
1671 /* THREAD hasn't been aborted since this exception happened (abortion
1672 clears any exception state), so it must be real. */
1674 /* Store away the details; this will destroy any previous info. */
1675 inf->wait.thread = thread;
1677 inf->wait.status.kind = TARGET_WAITKIND_STOPPED;
1679 if (exception == EXC_BREAKPOINT)
1680 /* GDB likes to get SIGTRAP for breakpoints. */
1682 inf->wait.status.value.sig = TARGET_SIGNAL_TRAP;
1683 mach_port_deallocate (mach_task_self (), reply_port);
1686 /* Record the exception so that we can forward it later. */
1688 if (thread->exc_port == port)
1690 inf_debug (waiting_inf, "Handler is thread exception port <%d>",
1691 thread->saved_exc_port);
1692 inf->wait.exc.handler = thread->saved_exc_port;
1696 inf_debug (waiting_inf, "Handler is task exception port <%d>",
1697 inf->task->saved_exc_port);
1698 inf->wait.exc.handler = inf->task->saved_exc_port;
1699 gdb_assert (inf->task->exc_port == port);
1701 if (inf->wait.exc.handler != MACH_PORT_NULL)
1702 /* Add a reference to the exception handler. */
1703 mach_port_mod_refs (mach_task_self (),
1704 inf->wait.exc.handler, MACH_PORT_RIGHT_SEND,
1707 inf->wait.exc.exception = exception;
1708 inf->wait.exc.code = code;
1709 inf->wait.exc.subcode = subcode;
1710 inf->wait.exc.reply = reply_port;
1712 /* Exceptions are encoded in the signal space by putting them after
1713 _NSIG; this assumes they're positive (and not extremely large)! */
1714 inf->wait.status.value.sig =
1715 target_signal_from_host (_NSIG + exception);
1719 /* A supppressed exception, which ignore. */
1721 inf->wait.suppress = 1;
1722 mach_port_deallocate (mach_task_self (), reply_port);
1729 /* Fill in INF's wait field after a task has died without giving us more
1730 detailed information. */
1732 inf_task_died_status (struct inf *inf)
1734 warning (_("Pid %d died with unknown exit status, using SIGKILL."), inf->pid);
1735 inf->wait.status.kind = TARGET_WAITKIND_SIGNALLED;
1736 inf->wait.status.value.sig = TARGET_SIGNAL_KILL;
1739 /* Notify server routines. The only real one is dead name notification. */
1741 do_mach_notify_dead_name (mach_port_t notify, mach_port_t dead_port)
1743 struct inf *inf = waiting_inf;
1745 inf_debug (waiting_inf, "port = %d", dead_port);
1747 if (inf->task && inf->task->port == dead_port)
1749 proc_debug (inf->task, "is dead");
1750 inf->task->port = MACH_PORT_NULL;
1751 if (proc_wait_pid == inf->pid)
1752 /* We have a wait outstanding on the process, which will return more
1753 detailed information, so delay until we get that. */
1754 inf->wait.suppress = 1;
1756 /* We never waited for the process (maybe it wasn't a child), so just
1757 pretend it got a SIGKILL. */
1758 inf_task_died_status (inf);
1762 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 */
1784 warning (_("illegal rpc: %s"), fun);
1789 do_mach_notify_no_senders (mach_port_t notify, mach_port_mscount_t count)
1791 return ill_rpc ("do_mach_notify_no_senders");
1795 do_mach_notify_port_deleted (mach_port_t notify, mach_port_t name)
1797 return ill_rpc ("do_mach_notify_port_deleted");
1801 do_mach_notify_msg_accepted (mach_port_t notify, mach_port_t name)
1803 return ill_rpc ("do_mach_notify_msg_accepted");
1807 do_mach_notify_port_destroyed (mach_port_t notify, mach_port_t name)
1809 return ill_rpc ("do_mach_notify_port_destroyed");
1813 do_mach_notify_send_once (mach_port_t notify)
1815 return ill_rpc ("do_mach_notify_send_once");
1819 /* Process_reply server routines. We only use process_wait_reply. */
1822 S_proc_wait_reply (mach_port_t reply, error_t err,
1823 int status, int sigcode, rusage_t rusage, pid_t pid)
1825 struct inf *inf = waiting_inf;
1827 inf_debug (inf, "err = %s, pid = %d, status = 0x%x, sigcode = %d",
1828 err ? safe_strerror (err) : "0", pid, status, sigcode);
1830 if (err && proc_wait_pid && (!inf->task || !inf->task->port))
1831 /* Ack. The task has died, but the task-died notification code didn't
1832 tell anyone because it thought a more detailed reply from the
1833 procserver was forthcoming. However, we now learn that won't
1834 happen... So we have to act like the task just died, and this time,
1836 inf_task_died_status (inf);
1838 if (--proc_waits_pending == 0)
1839 /* PROC_WAIT_PID represents the most recent wait. We will always get
1840 replies in order because the proc server is single threaded. */
1843 inf_debug (inf, "waits pending now: %d", proc_waits_pending);
1849 warning (_("Can't wait for pid %d: %s"), inf->pid, safe_strerror (err));
1852 /* Since we can't see the inferior's signals, don't trap them. */
1853 inf_set_traced (inf, 0);
1856 else if (pid == inf->pid)
1858 store_waitstatus (&inf->wait.status, status);
1859 if (inf->wait.status.kind == TARGET_WAITKIND_STOPPED)
1860 /* The process has sent us a signal, and stopped itself in a sane
1861 state pending our actions. */
1863 inf_debug (inf, "process has stopped itself");
1868 inf->wait.suppress = 1; /* Something odd happened. Ignore. */
1874 S_proc_setmsgport_reply (mach_port_t reply, error_t err,
1875 mach_port_t old_msg_port)
1877 return ill_rpc ("S_proc_setmsgport_reply");
1881 S_proc_getmsgport_reply (mach_port_t reply, error_t err, mach_port_t msg_port)
1883 return ill_rpc ("S_proc_getmsgport_reply");
1887 /* Msg_reply server routines. We only use msg_sig_post_untraced_reply. */
1890 S_msg_sig_post_untraced_reply (mach_port_t reply, error_t err)
1892 struct inf *inf = waiting_inf;
1895 /* EBUSY is what we get when the crash server has grabbed control of the
1896 process and doesn't like what signal we tried to send it. Just act
1897 like the process stopped (using a signal of 0 should mean that the
1898 *next* time the user continues, it will pass signal 0, which the crash
1899 server should like). */
1901 inf->wait.status.kind = TARGET_WAITKIND_STOPPED;
1902 inf->wait.status.value.sig = TARGET_SIGNAL_0;
1905 warning (_("Signal delivery failed: %s"), safe_strerror (err));
1908 /* We only get this reply when we've posted a signal to a process which we
1909 thought was stopped, and which we expected to continue after the signal.
1910 Given that the signal has failed for some reason, it's reasonable to
1911 assume it's still stopped. */
1914 inf->wait.suppress = 1;
1920 S_msg_sig_post_reply (mach_port_t reply, error_t err)
1922 return ill_rpc ("S_msg_sig_post_reply");
1926 /* Returns the number of messages queued for the receive right PORT. */
1927 static mach_port_msgcount_t
1928 port_msgs_queued (mach_port_t port)
1930 struct mach_port_status status;
1932 mach_port_get_receive_status (mach_task_self (), port, &status);
1937 return status.mps_msgcount;
1941 /* Resume execution of the inferior process.
1943 If STEP is nonzero, single-step it.
1944 If SIGNAL is nonzero, give it that signal.
1947 -1 true Single step the current thread allowing other threads to run.
1948 -1 false Continue the current thread allowing other threads to run.
1949 X true Single step the given thread, don't allow any others to run.
1950 X false Continue the given thread, do not allow any others to run.
1951 (Where X, of course, is anything except -1)
1953 Note that a resume may not `take' if there are pending exceptions/&c
1954 still unprocessed from the last resume we did (any given resume may result
1955 in multiple events returned by wait).
1958 gnu_resume (struct target_ops *ops,
1959 ptid_t ptid, int step, enum target_signal sig)
1961 struct proc *step_thread = 0;
1963 struct inf *inf = gnu_current_inf;
1965 inf_debug (inf, "ptid = %s, step = %d, sig = %d",
1966 target_pid_to_str (ptid), step, sig);
1968 inf_validate_procinfo (inf);
1970 if (sig != TARGET_SIGNAL_0 || inf->stopped)
1972 if (sig == TARGET_SIGNAL_0 && inf->nomsg)
1975 inf_signal (inf, sig);
1977 else if (inf->wait.exc.reply != MACH_PORT_NULL)
1978 /* We received an exception to which we have chosen not to forward, so
1979 abort the faulting thread, which will perhaps retake it. */
1981 proc_abort (inf->wait.thread, 1);
1982 warning (_("Aborting %s with unforwarded exception %s."),
1983 proc_string (inf->wait.thread),
1984 target_signal_to_name (inf->wait.status.value.sig));
1987 if (port_msgs_queued (inf->event_port))
1988 /* If there are still messages in our event queue, don't bother resuming
1989 the process, as we're just going to stop it right away anyway. */
1992 inf_update_procs (inf);
1994 /* A specific PTID means `step only this process id'. */
1995 resume_all = ptid_equal (ptid, minus_one_ptid);
1998 /* Allow all threads to run, except perhaps single-stepping one. */
2000 inf_debug (inf, "running all threads; tid = %d", PIDGET (inferior_ptid));
2001 ptid = inferior_ptid; /* What to step. */
2002 inf_set_threads_resume_sc (inf, 0, 1);
2005 /* Just allow a single thread to run. */
2007 struct proc *thread = inf_tid_to_thread (inf, ptid_get_tid (ptid));
2009 error (_("Can't run single thread id %s: no such thread!"),
2010 target_pid_to_str (ptid));
2011 inf_debug (inf, "running one thread: %s", target_pid_to_str (ptid));
2012 inf_set_threads_resume_sc (inf, thread, 0);
2017 step_thread = inf_tid_to_thread (inf, ptid_get_tid (ptid));
2019 warning (_("Can't step thread id %s: no such thread."),
2020 target_pid_to_str (ptid));
2022 inf_debug (inf, "stepping thread: %s", target_pid_to_str (ptid));
2024 if (step_thread != inf->step_thread)
2025 inf_set_step_thread (inf, step_thread);
2027 inf_debug (inf, "here we go...");
2033 gnu_kill_inferior (struct target_ops *ops)
2035 struct proc *task = gnu_current_inf->task;
2038 proc_debug (task, "terminating...");
2039 task_terminate (task->port);
2040 inf_set_pid (gnu_current_inf, -1);
2042 target_mourn_inferior ();
2045 /* Clean up after the inferior dies. */
2047 gnu_mourn_inferior (struct target_ops *ops)
2049 inf_debug (gnu_current_inf, "rip");
2050 inf_detach (gnu_current_inf);
2051 unpush_target (ops);
2052 generic_mourn_inferior ();
2056 /* Fork an inferior process, and start debugging it. */
2058 /* Set INFERIOR_PID to the first thread available in the child, if any. */
2060 inf_pick_first_thread (void)
2062 if (gnu_current_inf->task && gnu_current_inf->threads)
2063 /* The first thread. */
2064 return gnu_current_inf->threads->tid;
2066 /* What may be the next thread. */
2067 return next_thread_id;
2073 if (!gnu_current_inf)
2074 gnu_current_inf = make_inf ();
2075 return gnu_current_inf;
2079 gnu_create_inferior (struct target_ops *ops,
2080 char *exec_file, char *allargs, char **env,
2083 struct inf *inf = cur_inf ();
2088 /* We're in the child; make this process stop as soon as it execs. */
2089 inf_debug (inf, "tracing self");
2090 if (ptrace (PTRACE_TRACEME) != 0)
2091 error (_("ptrace (PTRACE_TRACEME) failed!"));
2094 inf_debug (inf, "creating inferior");
2096 pid = fork_inferior (exec_file, allargs, env, trace_me, NULL, NULL, NULL);
2098 /* Attach to the now stopped child, which is actually a shell... */
2099 inf_debug (inf, "attaching to child: %d", pid);
2101 inf_attach (inf, pid);
2105 inf->pending_execs = 2;
2109 /* Now let the child run again, knowing that it will stop
2110 immediately because of the ptrace. */
2113 /* We now have thread info. */
2114 thread_change_ptid (inferior_ptid,
2115 ptid_build (inf->pid, 0, inf_pick_first_thread ()));
2117 startup_inferior (inf->pending_execs);
2119 inf_validate_procinfo (inf);
2120 inf_update_signal_thread (inf);
2121 inf_set_traced (inf, inf->want_signals);
2123 /* Execing the process will have trashed our exception ports; steal them
2124 back (or make sure they're restored if the user wants that). */
2125 if (inf->want_exceptions)
2126 inf_steal_exc_ports (inf);
2128 inf_restore_exc_ports (inf);
2132 /* Attach to process PID, then initialize for debugging it
2133 and wait for the trace-trap that results from attaching. */
2135 gnu_attach (struct target_ops *ops, char *args, int from_tty)
2139 struct inf *inf = cur_inf ();
2140 struct inferior *inferior;
2143 error_no_arg (_("process-id to attach"));
2147 if (pid == getpid ()) /* Trying to masturbate? */
2148 error (_("I refuse to debug myself!"));
2152 exec_file = (char *) get_exec_file (0);
2155 printf_unfiltered ("Attaching to program `%s', pid %d\n",
2158 printf_unfiltered ("Attaching to pid %d\n", pid);
2160 gdb_flush (gdb_stdout);
2163 inf_debug (inf, "attaching to pid: %d", pid);
2165 inf_attach (inf, pid);
2169 inferior = current_inferior ();
2170 inferior_appeared (inferior, pid);
2171 inferior->attach_flag = 1;
2173 inf_update_procs (inf);
2175 inferior_ptid = ptid_build (pid, 0, inf_pick_first_thread ());
2177 /* We have to initialize the terminal settings now, since the code
2178 below might try to restore them. */
2179 target_terminal_init ();
2181 /* If the process was stopped before we attached, make it continue the next
2182 time the user does a continue. */
2183 inf_validate_procinfo (inf);
2185 inf_update_signal_thread (inf);
2186 inf_set_traced (inf, inf->want_signals);
2188 #if 0 /* Do we need this? */
2189 renumber_threads (0); /* Give our threads reasonable names. */
2194 /* Take a program previously attached to and detaches it.
2195 The program resumes execution and will no longer stop
2196 on signals, etc. We'd better not have left any breakpoints
2197 in the program or it'll die when it hits one. For this
2198 to work, it may be necessary for the process to have been
2199 previously attached. It *might* work if the program was
2200 started via fork. */
2202 gnu_detach (struct target_ops *ops, char *args, int from_tty)
2208 char *exec_file = get_exec_file (0);
2210 printf_unfiltered ("Detaching from program `%s' pid %d\n",
2211 exec_file, gnu_current_inf->pid);
2213 printf_unfiltered ("Detaching from pid %d\n", gnu_current_inf->pid);
2214 gdb_flush (gdb_stdout);
2217 pid = gnu_current_inf->pid;
2219 inf_detach (gnu_current_inf);
2221 inferior_ptid = null_ptid;
2222 detach_inferior (pid);
2224 unpush_target (ops); /* Pop out of handling an inferior */
2228 gnu_terminal_init_inferior (void)
2230 gdb_assert (gnu_current_inf);
2231 terminal_init_inferior_with_pgrp (gnu_current_inf->pid);
2235 gnu_stop (ptid_t ptid)
2237 error (_("to_stop target function not implemented"));
2241 gnu_thread_alive (struct target_ops *ops, ptid_t ptid)
2243 inf_update_procs (gnu_current_inf);
2244 return !!inf_tid_to_thread (gnu_current_inf,
2245 ptid_get_tid (ptid));
2249 /* Read inferior task's LEN bytes from ADDR and copy it to MYADDR in
2250 gdb's address space. Return 0 on failure; number of bytes read
2253 gnu_read_inferior (task_t task, CORE_ADDR addr, char *myaddr, int length)
2256 vm_address_t low_address = (vm_address_t) trunc_page (addr);
2257 vm_size_t aligned_length =
2258 (vm_size_t) round_page (addr + length) - low_address;
2262 /* Get memory from inferior with page aligned addresses */
2263 err = vm_read (task, low_address, aligned_length, &copied, ©_count);
2267 err = hurd_safe_copyin (myaddr, (void *) (addr - low_address + copied), length);
2270 warning (_("Read from inferior faulted: %s"), safe_strerror (err));
2274 err = vm_deallocate (mach_task_self (), copied, copy_count);
2276 warning (_("gnu_read_inferior vm_deallocate failed: %s"), safe_strerror (err));
2281 #define CHK_GOTO_OUT(str,ret) \
2282 do if (ret != KERN_SUCCESS) { errstr = #str; goto out; } while(0)
2284 struct vm_region_list
2286 struct vm_region_list *next;
2287 vm_prot_t protection;
2292 struct obstack region_obstack;
2294 /* Write gdb's LEN bytes from MYADDR and copy it to ADDR in inferior
2295 task's address space. */
2297 gnu_write_inferior (task_t task, CORE_ADDR addr, char *myaddr, int length)
2300 vm_address_t low_address = (vm_address_t) trunc_page (addr);
2301 vm_size_t aligned_length =
2302 (vm_size_t) round_page (addr + length) - low_address;
2307 char *errstr = "Bug in gnu_write_inferior";
2309 struct vm_region_list *region_element;
2310 struct vm_region_list *region_head = (struct vm_region_list *) NULL;
2312 /* Get memory from inferior with page aligned addresses */
2313 err = vm_read (task,
2318 CHK_GOTO_OUT ("gnu_write_inferior vm_read failed", err);
2322 err = hurd_safe_copyout ((void *) (addr - low_address + copied),
2324 CHK_GOTO_OUT ("Write to inferior faulted", err);
2326 obstack_init (®ion_obstack);
2328 /* Do writes atomically.
2329 First check for holes and unwritable memory. */
2331 vm_size_t remaining_length = aligned_length;
2332 vm_address_t region_address = low_address;
2334 struct vm_region_list *scan;
2336 while (region_address < low_address + aligned_length)
2338 vm_prot_t protection;
2339 vm_prot_t max_protection;
2340 vm_inherit_t inheritance;
2342 mach_port_t object_name;
2344 vm_size_t region_length = remaining_length;
2345 vm_address_t old_address = region_address;
2347 err = vm_region (task,
2356 CHK_GOTO_OUT ("vm_region failed", err);
2358 /* Check for holes in memory */
2359 if (old_address != region_address)
2361 warning (_("No memory at 0x%x. Nothing written"),
2368 if (!(max_protection & VM_PROT_WRITE))
2370 warning (_("Memory at address 0x%x is unwritable. Nothing written"),
2377 /* Chain the regions for later use */
2379 (struct vm_region_list *)
2380 obstack_alloc (®ion_obstack, sizeof (struct vm_region_list));
2382 region_element->protection = protection;
2383 region_element->start = region_address;
2384 region_element->length = region_length;
2386 /* Chain the regions along with protections */
2387 region_element->next = region_head;
2388 region_head = region_element;
2390 region_address += region_length;
2391 remaining_length = remaining_length - region_length;
2394 /* If things fail after this, we give up.
2395 Somebody is messing up inferior_task's mappings. */
2397 /* Enable writes to the chained vm regions */
2398 for (scan = region_head; scan; scan = scan->next)
2400 if (!(scan->protection & VM_PROT_WRITE))
2402 err = vm_protect (task,
2406 scan->protection | VM_PROT_WRITE);
2407 CHK_GOTO_OUT ("vm_protect: enable write failed", err);
2411 err = vm_write (task,
2415 CHK_GOTO_OUT ("vm_write failed", err);
2417 /* Set up the original region protections, if they were changed */
2418 for (scan = region_head; scan; scan = scan->next)
2420 if (!(scan->protection & VM_PROT_WRITE))
2422 err = vm_protect (task,
2427 CHK_GOTO_OUT ("vm_protect: enable write failed", err);
2435 obstack_free (®ion_obstack, 0);
2437 (void) vm_deallocate (mach_task_self (),
2442 if (err != KERN_SUCCESS)
2444 warning (_("%s: %s"), errstr, mach_error_string (err));
2452 /* Return 0 on failure, number of bytes handled otherwise. TARGET
2455 gnu_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write,
2456 struct mem_attrib *attrib,
2457 struct target_ops *target)
2459 task_t task = (gnu_current_inf
2460 ? (gnu_current_inf->task
2461 ? gnu_current_inf->task->port : 0)
2464 if (task == MACH_PORT_NULL)
2468 inf_debug (gnu_current_inf, "%s %s[%d] %s %s",
2469 write ? "writing" : "reading",
2470 paddress (target_gdbarch, memaddr), len,
2471 write ? "<--" : "-->", host_address_to_string (myaddr));
2473 return gnu_write_inferior (task, memaddr, myaddr, len);
2475 return gnu_read_inferior (task, memaddr, myaddr, len);
2479 /* Call FUNC on each memory region in the task. */
2481 gnu_find_memory_regions (int (*func) (CORE_ADDR,
2489 vm_address_t region_address, last_region_address, last_region_end;
2490 vm_prot_t last_protection;
2492 if (gnu_current_inf == 0 || gnu_current_inf->task == 0)
2494 task = gnu_current_inf->task->port;
2495 if (task == MACH_PORT_NULL)
2498 region_address = last_region_address = last_region_end = VM_MIN_ADDRESS;
2499 last_protection = VM_PROT_NONE;
2500 while (region_address < VM_MAX_ADDRESS)
2502 vm_prot_t protection;
2503 vm_prot_t max_protection;
2504 vm_inherit_t inheritance;
2506 mach_port_t object_name;
2508 vm_size_t region_length = VM_MAX_ADDRESS - region_address;
2509 vm_address_t old_address = region_address;
2511 err = vm_region (task,
2520 if (err == KERN_NO_SPACE)
2522 if (err != KERN_SUCCESS)
2524 warning (_("vm_region failed: %s"), mach_error_string (err));
2528 if (protection == last_protection && region_address == last_region_end)
2529 /* This region is contiguous with and indistinguishable from
2530 the previous one, so we just extend that one. */
2531 last_region_end = region_address += region_length;
2534 /* This region is distinct from the last one we saw, so report
2535 that previous one. */
2536 if (last_protection != VM_PROT_NONE)
2537 (*func) (last_region_address,
2538 last_region_end - last_region_address,
2539 last_protection & VM_PROT_READ,
2540 last_protection & VM_PROT_WRITE,
2541 last_protection & VM_PROT_EXECUTE,
2543 last_region_address = region_address;
2544 last_region_end = region_address += region_length;
2545 last_protection = protection;
2549 /* Report the final region. */
2550 if (last_region_end > last_region_address && last_protection != VM_PROT_NONE)
2551 (*func) (last_region_address, last_region_end - last_region_address,
2552 last_protection & VM_PROT_READ,
2553 last_protection & VM_PROT_WRITE,
2554 last_protection & VM_PROT_EXECUTE,
2561 /* Return printable description of proc. */
2563 proc_string (struct proc *proc)
2565 static char tid_str[80];
2566 if (proc_is_task (proc))
2567 sprintf (tid_str, "process %d", proc->inf->pid);
2569 sprintf (tid_str, "Thread %d.%d",
2570 proc->inf->pid, proc->tid);
2575 gnu_pid_to_str (struct target_ops *ops, ptid_t ptid)
2577 struct inf *inf = gnu_current_inf;
2578 int tid = ptid_get_tid (ptid);
2579 struct proc *thread = inf_tid_to_thread (inf, tid);
2582 return proc_string (thread);
2585 static char tid_str[80];
2586 sprintf (tid_str, "bogus thread id %d", tid);
2592 /* Create a prototype generic GNU/Hurd target. The client can
2593 override it with local methods. */
2598 struct target_ops *t = inf_child_target ();
2600 t->to_shortname = "GNU";
2601 t->to_longname = "GNU Hurd process";
2602 t->to_doc = "GNU Hurd process";
2604 t->to_attach = gnu_attach;
2605 t->to_attach_no_wait = 1;
2606 t->to_detach = gnu_detach;
2607 t->to_resume = gnu_resume;
2608 t->to_wait = gnu_wait;
2609 t->deprecated_xfer_memory = gnu_xfer_memory;
2610 t->to_find_memory_regions = gnu_find_memory_regions;
2611 t->to_terminal_init = gnu_terminal_init_inferior;
2612 t->to_kill = gnu_kill_inferior;
2613 t->to_create_inferior = gnu_create_inferior;
2614 t->to_mourn_inferior = gnu_mourn_inferior;
2615 t->to_thread_alive = gnu_thread_alive;
2616 t->to_pid_to_str = gnu_pid_to_str;
2617 t->to_stop = gnu_stop;
2623 /* User task commands. */
2625 struct cmd_list_element *set_task_cmd_list = 0;
2626 struct cmd_list_element *show_task_cmd_list = 0;
2627 /* User thread commands. */
2629 /* Commands with a prefix of `set/show thread'. */
2630 extern struct cmd_list_element *thread_cmd_list;
2631 struct cmd_list_element *set_thread_cmd_list = NULL;
2632 struct cmd_list_element *show_thread_cmd_list = NULL;
2634 /* Commands with a prefix of `set/show thread default'. */
2635 struct cmd_list_element *set_thread_default_cmd_list = NULL;
2636 struct cmd_list_element *show_thread_default_cmd_list = NULL;
2639 set_thread_cmd (char *args, int from_tty)
2641 printf_unfiltered ("\"set thread\" must be followed by the name of a thread property, or \"default\".\n");
2645 show_thread_cmd (char *args, int from_tty)
2647 printf_unfiltered ("\"show thread\" must be followed by the name of a thread property, or \"default\".\n");
2651 set_thread_default_cmd (char *args, int from_tty)
2653 printf_unfiltered ("\"set thread default\" must be followed by the name of a thread property.\n");
2657 show_thread_default_cmd (char *args, int from_tty)
2659 printf_unfiltered ("\"show thread default\" must be followed by the name of a thread property.\n");
2663 parse_int_arg (char *args, char *cmd_prefix)
2668 int val = strtoul (args, &arg_end, 10);
2669 if (*args && *arg_end == '\0')
2672 error (_("Illegal argument for \"%s\" command, should be an integer."), cmd_prefix);
2676 _parse_bool_arg (char *args, char *t_val, char *f_val, char *cmd_prefix)
2678 if (!args || strcmp (args, t_val) == 0)
2680 else if (strcmp (args, f_val) == 0)
2683 error (_("Illegal argument for \"%s\" command, should be \"%s\" or \"%s\"."),
2684 cmd_prefix, t_val, f_val);
2687 #define parse_bool_arg(args, cmd_prefix) \
2688 _parse_bool_arg (args, "on", "off", cmd_prefix)
2691 check_empty (char *args, char *cmd_prefix)
2694 error (_("Garbage after \"%s\" command: `%s'"), cmd_prefix, args);
2697 /* Returns the alive thread named by INFERIOR_PID, or signals an error. */
2698 static struct proc *
2701 struct inf *inf = cur_inf ();
2702 struct proc *thread = inf_tid_to_thread (inf,
2703 ptid_get_tid (inferior_ptid));
2705 error (_("No current thread."));
2709 /* Returns the current inferior, but signals an error if it has no task. */
2713 struct inf *inf = cur_inf ();
2715 error (_("No current process."));
2721 set_task_pause_cmd (char *args, int from_tty)
2723 struct inf *inf = cur_inf ();
2724 int old_sc = inf->pause_sc;
2726 inf->pause_sc = parse_bool_arg (args, "set task pause");
2728 if (old_sc == 0 && inf->pause_sc != 0)
2729 /* If the task is currently unsuspended, immediately suspend it,
2730 otherwise wait until the next time it gets control. */
2735 show_task_pause_cmd (char *args, int from_tty)
2737 struct inf *inf = cur_inf ();
2738 check_empty (args, "show task pause");
2739 printf_unfiltered ("The inferior task %s suspended while gdb has control.\n",
2741 ? (inf->pause_sc == 0 ? "isn't" : "is")
2742 : (inf->pause_sc == 0 ? "won't be" : "will be"));
2746 set_task_detach_sc_cmd (char *args, int from_tty)
2748 cur_inf ()->detach_sc = parse_int_arg (args, "set task detach-suspend-count");
2752 show_task_detach_sc_cmd (char *args, int from_tty)
2754 check_empty (args, "show task detach-suspend-count");
2755 printf_unfiltered ("The inferior task will be left with a suspend count of %d when detaching.\n",
2756 cur_inf ()->detach_sc);
2761 set_thread_default_pause_cmd (char *args, int from_tty)
2763 struct inf *inf = cur_inf ();
2764 inf->default_thread_pause_sc =
2765 parse_bool_arg (args, "set thread default pause") ? 0 : 1;
2769 show_thread_default_pause_cmd (char *args, int from_tty)
2771 struct inf *inf = cur_inf ();
2772 int sc = inf->default_thread_pause_sc;
2773 check_empty (args, "show thread default pause");
2774 printf_unfiltered ("New threads %s suspended while gdb has control%s.\n",
2775 sc ? "are" : "aren't",
2776 !sc && inf->pause_sc ? " (but the task is)" : "");
2780 set_thread_default_run_cmd (char *args, int from_tty)
2782 struct inf *inf = cur_inf ();
2783 inf->default_thread_run_sc =
2784 parse_bool_arg (args, "set thread default run") ? 0 : 1;
2788 show_thread_default_run_cmd (char *args, int from_tty)
2790 struct inf *inf = cur_inf ();
2791 check_empty (args, "show thread default run");
2792 printf_unfiltered ("New threads %s allowed to run.\n",
2793 inf->default_thread_run_sc == 0 ? "are" : "aren't");
2797 set_thread_default_detach_sc_cmd (char *args, int from_tty)
2799 cur_inf ()->default_thread_detach_sc =
2800 parse_int_arg (args, "set thread default detach-suspend-count");
2804 show_thread_default_detach_sc_cmd (char *args, int from_tty)
2806 check_empty (args, "show thread default detach-suspend-count");
2807 printf_unfiltered ("New threads will get a detach-suspend-count of %d.\n",
2808 cur_inf ()->default_thread_detach_sc);
2812 /* Steal a send right called NAME in the inferior task, and make it PROC's
2813 saved exception port. */
2815 steal_exc_port (struct proc *proc, mach_port_t name)
2819 mach_msg_type_name_t port_type;
2821 if (!proc || !proc->inf->task)
2822 error (_("No inferior task."));
2824 err = mach_port_extract_right (proc->inf->task->port,
2825 name, MACH_MSG_TYPE_COPY_SEND,
2828 error (_("Couldn't extract send right %d from inferior: %s"),
2829 name, safe_strerror (err));
2831 if (proc->saved_exc_port)
2832 /* Get rid of our reference to the old one. */
2833 mach_port_deallocate (mach_task_self (), proc->saved_exc_port);
2835 proc->saved_exc_port = port;
2837 if (!proc->exc_port)
2838 /* If PROC is a thread, we may not have set its exception port before.
2839 We can't use proc_steal_exc_port because it also sets saved_exc_port. */
2841 proc->exc_port = proc->inf->event_port;
2842 err = proc_set_exception_port (proc, proc->exc_port);
2843 error (_("Can't set exception port for %s: %s"),
2844 proc_string (proc), safe_strerror (err));
2849 set_task_exc_port_cmd (char *args, int from_tty)
2851 struct inf *inf = cur_inf ();
2853 error (_("No argument to \"set task exception-port\" command."));
2854 steal_exc_port (inf->task, parse_and_eval_address (args));
2858 set_stopped_cmd (char *args, int from_tty)
2860 cur_inf ()->stopped = _parse_bool_arg (args, "yes", "no", "set stopped");
2864 show_stopped_cmd (char *args, int from_tty)
2866 struct inf *inf = active_inf ();
2867 check_empty (args, "show stopped");
2868 printf_unfiltered ("The inferior process %s stopped.\n",
2869 inf->stopped ? "is" : "isn't");
2873 set_sig_thread_cmd (char *args, int from_tty)
2875 struct inf *inf = cur_inf ();
2877 if (!args || (!isdigit (*args) && strcmp (args, "none") != 0))
2878 error (_("Illegal argument to \"set signal-thread\" command.\n"
2879 "Should be an integer thread ID, or `none'."));
2881 if (strcmp (args, "none") == 0)
2882 inf->signal_thread = 0;
2885 int tid = ptid_get_tid (thread_id_to_pid (atoi (args)));
2887 error (_("Thread ID %s not known. Use the \"info threads\" command to\n"
2888 "see the IDs of currently known threads."), args);
2889 inf->signal_thread = inf_tid_to_thread (inf, tid);
2894 show_sig_thread_cmd (char *args, int from_tty)
2896 struct inf *inf = active_inf ();
2897 check_empty (args, "show signal-thread");
2898 if (inf->signal_thread)
2899 printf_unfiltered ("The signal thread is %s.\n",
2900 proc_string (inf->signal_thread));
2902 printf_unfiltered ("There is no signal thread.\n");
2907 set_signals_cmd (char *args, int from_tty)
2909 struct inf *inf = cur_inf ();
2911 inf->want_signals = parse_bool_arg (args, "set signals");
2913 if (inf->task && inf->want_signals != inf->traced)
2914 /* Make this take effect immediately in a running process. */
2915 inf_set_traced (inf, inf->want_signals);
2919 show_signals_cmd (char *args, int from_tty)
2921 struct inf *inf = cur_inf ();
2922 check_empty (args, "show signals");
2923 printf_unfiltered ("The inferior process's signals %s intercepted.\n",
2925 ? (inf->traced ? "are" : "aren't")
2926 : (inf->want_signals ? "will be" : "won't be"));
2930 set_exceptions_cmd (char *args, int from_tty)
2932 struct inf *inf = cur_inf ();
2933 int val = parse_bool_arg (args, "set exceptions");
2935 if (inf->task && inf->want_exceptions != val)
2936 /* Make this take effect immediately in a running process. */
2939 inf->want_exceptions = val;
2943 show_exceptions_cmd (char *args, int from_tty)
2945 struct inf *inf = cur_inf ();
2946 check_empty (args, "show exceptions");
2947 printf_unfiltered ("Exceptions in the inferior %s trapped.\n",
2949 ? (inf->want_exceptions ? "are" : "aren't")
2950 : (inf->want_exceptions ? "will be" : "won't be"));
2955 set_task_cmd (char *args, int from_tty)
2957 printf_unfiltered ("\"set task\" must be followed by the name"
2958 " of a task property.\n");
2962 show_task_cmd (char *args, int from_tty)
2964 struct inf *inf = cur_inf ();
2966 check_empty (args, "show task");
2968 show_signals_cmd (0, from_tty);
2969 show_exceptions_cmd (0, from_tty);
2970 show_task_pause_cmd (0, from_tty);
2972 if (inf->pause_sc == 0)
2973 show_thread_default_pause_cmd (0, from_tty);
2974 show_thread_default_run_cmd (0, from_tty);
2978 show_stopped_cmd (0, from_tty);
2979 show_sig_thread_cmd (0, from_tty);
2982 if (inf->detach_sc != 0)
2983 show_task_detach_sc_cmd (0, from_tty);
2984 if (inf->default_thread_detach_sc != 0)
2985 show_thread_default_detach_sc_cmd (0, from_tty);
2990 set_noninvasive_cmd (char *args, int from_tty)
2992 /* Invert the sense of the arg for each component. */
2993 char *inv_args = parse_bool_arg (args, "set noninvasive") ? "off" : "on";
2995 set_task_pause_cmd (inv_args, from_tty);
2996 set_signals_cmd (inv_args, from_tty);
2997 set_exceptions_cmd (inv_args, from_tty);
3002 info_port_rights (char *args, mach_port_type_t only)
3004 struct inf *inf = active_inf ();
3005 struct value *vmark = value_mark ();
3008 /* Explicit list of port rights. */
3012 struct value *val = parse_to_comma_and_eval (&args);
3013 long right = value_as_long (val);
3015 print_port_info (right, 0, inf->task->port, PORTINFO_DETAILS,
3018 error (_("%ld: %s."), right, safe_strerror (err));
3022 /* Print all of them. */
3025 print_task_ports_info (inf->task->port, only, PORTINFO_DETAILS,
3028 error (_("%s."), safe_strerror (err));
3031 value_free_to_mark (vmark);
3035 info_send_rights_cmd (char *args, int from_tty)
3037 info_port_rights (args, MACH_PORT_TYPE_SEND);
3041 info_recv_rights_cmd (char *args, int from_tty)
3043 info_port_rights (args, MACH_PORT_TYPE_RECEIVE);
3047 info_port_sets_cmd (char *args, int from_tty)
3049 info_port_rights (args, MACH_PORT_TYPE_PORT_SET);
3053 info_dead_names_cmd (char *args, int from_tty)
3055 info_port_rights (args, MACH_PORT_TYPE_DEAD_NAME);
3059 info_port_rights_cmd (char *args, int from_tty)
3061 info_port_rights (args, ~0);
3066 add_task_commands (void)
3068 add_cmd ("pause", class_run, set_thread_default_pause_cmd, _("\
3069 Set whether the new threads are suspended while gdb has control.\n\
3070 This property normally has no effect because the whole task is\n\
3071 suspended, however, that may be disabled with \"set task pause off\".\n\
3072 The default value is \"off\"."),
3073 &set_thread_default_cmd_list);
3074 add_cmd ("pause", no_class, show_thread_default_pause_cmd, _("\
3075 Show whether new threads are suspended while gdb has control."),
3076 &show_thread_default_cmd_list);
3078 add_cmd ("run", class_run, set_thread_default_run_cmd, _("\
3079 Set whether new threads are allowed to run (once gdb has noticed them)."),
3080 &set_thread_default_cmd_list);
3081 add_cmd ("run", no_class, show_thread_default_run_cmd, _("\
3082 Show whether new threads are allowed to run (once gdb has noticed them)."),
3083 &show_thread_default_cmd_list);
3085 add_cmd ("detach-suspend-count", class_run, set_thread_default_detach_sc_cmd,
3086 _("Set the default detach-suspend-count value for new threads."),
3087 &set_thread_default_cmd_list);
3088 add_cmd ("detach-suspend-count", no_class, show_thread_default_detach_sc_cmd,
3089 _("Show the default detach-suspend-count value for new threads."),
3090 &show_thread_default_cmd_list);
3092 add_cmd ("signals", class_run, set_signals_cmd, _("\
3093 Set whether the inferior process's signals will be intercepted.\n\
3094 Mach exceptions (such as breakpoint traps) are not affected."),
3096 add_alias_cmd ("sigs", "signals", class_run, 1, &setlist);
3097 add_cmd ("signals", no_class, show_signals_cmd, _("\
3098 Show whether the inferior process's signals will be intercepted."),
3100 add_alias_cmd ("sigs", "signals", no_class, 1, &showlist);
3102 add_cmd ("signal-thread", class_run, set_sig_thread_cmd, _("\
3103 Set the thread that gdb thinks is the libc signal thread.\n\
3104 This thread is run when delivering a signal to a non-stopped process."),
3106 add_alias_cmd ("sigthread", "signal-thread", class_run, 1, &setlist);
3107 add_cmd ("signal-thread", no_class, show_sig_thread_cmd, _("\
3108 Set the thread that gdb thinks is the libc signal thread."),
3110 add_alias_cmd ("sigthread", "signal-thread", no_class, 1, &showlist);
3112 add_cmd ("stopped", class_run, set_stopped_cmd, _("\
3113 Set whether gdb thinks the inferior process is stopped as with SIGSTOP.\n\
3114 Stopped process will be continued by sending them a signal."),
3116 add_cmd ("stopped", no_class, show_stopped_cmd, _("\
3117 Show whether gdb thinks the inferior process is stopped as with SIGSTOP."),
3120 add_cmd ("exceptions", class_run, set_exceptions_cmd, _("\
3121 Set whether exceptions in the inferior process will be trapped.\n\
3122 When exceptions are turned off, neither breakpoints nor single-stepping\n\
3125 /* Allow `set exc' despite conflict with `set exception-port'. */
3126 add_alias_cmd ("exc", "exceptions", class_run, 1, &setlist);
3127 add_cmd ("exceptions", no_class, show_exceptions_cmd, _("\
3128 Show whether exceptions in the inferior process will be trapped."),
3131 add_prefix_cmd ("task", no_class, set_task_cmd,
3132 _("Command prefix for setting task attributes."),
3133 &set_task_cmd_list, "set task ", 0, &setlist);
3134 add_prefix_cmd ("task", no_class, show_task_cmd,
3135 _("Command prefix for showing task attributes."),
3136 &show_task_cmd_list, "show task ", 0, &showlist);
3138 add_cmd ("pause", class_run, set_task_pause_cmd, _("\
3139 Set whether the task is suspended while gdb has control.\n\
3140 A value of \"on\" takes effect immediately, otherwise nothing happens\n\
3141 until the next time the program is continued.\n\
3142 When setting this to \"off\", \"set thread default pause on\" can be\n\
3143 used to pause individual threads by default instead."),
3144 &set_task_cmd_list);
3145 add_cmd ("pause", no_class, show_task_pause_cmd,
3146 _("Show whether the task is suspended while gdb has control."),
3147 &show_task_cmd_list);
3149 add_cmd ("detach-suspend-count", class_run, set_task_detach_sc_cmd,
3150 _("Set the suspend count will leave on the thread when detaching."),
3151 &set_task_cmd_list);
3152 add_cmd ("detach-suspend-count", no_class, show_task_detach_sc_cmd,
3153 _("Show the suspend count will leave on the thread when detaching."),
3154 &show_task_cmd_list);
3156 add_cmd ("exception-port", no_class, set_task_exc_port_cmd, _("\
3157 Set the task exception port to which we forward exceptions.\n\
3158 The argument should be the value of the send right in the task."),
3159 &set_task_cmd_list);
3160 add_alias_cmd ("excp", "exception-port", no_class, 1, &set_task_cmd_list);
3161 add_alias_cmd ("exc-port", "exception-port", no_class, 1,
3162 &set_task_cmd_list);
3164 /* A convenient way of turning on all options require to noninvasively
3165 debug running tasks. */
3166 add_cmd ("noninvasive", no_class, set_noninvasive_cmd, _("\
3167 Set task options so that we interfere as little as possible.\n\
3168 This is the same as setting `task pause', `exceptions', and\n\
3169 `signals' to the opposite value."),
3172 /* Commands to show information about the task's ports. */
3173 add_cmd ("send-rights", class_info, info_send_rights_cmd,
3174 _("Show information about the task's send rights"),
3176 add_cmd ("receive-rights", class_info, info_recv_rights_cmd,
3177 _("Show information about the task's receive rights"),
3179 add_cmd ("port-rights", class_info, info_port_rights_cmd,
3180 _("Show information about the task's port rights"),
3182 add_cmd ("port-sets", class_info, info_port_sets_cmd,
3183 _("Show information about the task's port sets"),
3185 add_cmd ("dead-names", class_info, info_dead_names_cmd,
3186 _("Show information about the task's dead names"),
3188 add_info_alias ("ports", "port-rights", 1);
3189 add_info_alias ("port", "port-rights", 1);
3190 add_info_alias ("psets", "port-sets", 1);
3195 set_thread_pause_cmd (char *args, int from_tty)
3197 struct proc *thread = cur_thread ();
3198 int old_sc = thread->pause_sc;
3199 thread->pause_sc = parse_bool_arg (args, "set thread pause");
3200 if (old_sc == 0 && thread->pause_sc != 0 && thread->inf->pause_sc == 0)
3201 /* If the task is currently unsuspended, immediately suspend it,
3202 otherwise wait until the next time it gets control. */
3203 inf_suspend (thread->inf);
3207 show_thread_pause_cmd (char *args, int from_tty)
3209 struct proc *thread = cur_thread ();
3210 int sc = thread->pause_sc;
3211 check_empty (args, "show task pause");
3212 printf_unfiltered ("Thread %s %s suspended while gdb has control%s.\n",
3213 proc_string (thread),
3214 sc ? "is" : "isn't",
3215 !sc && thread->inf->pause_sc ? " (but the task is)" : "");
3219 set_thread_run_cmd (char *args, int from_tty)
3221 struct proc *thread = cur_thread ();
3222 thread->run_sc = parse_bool_arg (args, "set thread run") ? 0 : 1;
3226 show_thread_run_cmd (char *args, int from_tty)
3228 struct proc *thread = cur_thread ();
3229 check_empty (args, "show thread run");
3230 printf_unfiltered ("Thread %s %s allowed to run.",
3231 proc_string (thread),
3232 thread->run_sc == 0 ? "is" : "isn't");
3236 set_thread_detach_sc_cmd (char *args, int from_tty)
3238 cur_thread ()->detach_sc = parse_int_arg (args,
3239 "set thread detach-suspend-count");
3243 show_thread_detach_sc_cmd (char *args, int from_tty)
3245 struct proc *thread = cur_thread ();
3246 check_empty (args, "show thread detach-suspend-count");
3247 printf_unfiltered ("Thread %s will be left with a suspend count"
3248 " of %d when detaching.\n",
3249 proc_string (thread),
3254 set_thread_exc_port_cmd (char *args, int from_tty)
3256 struct proc *thread = cur_thread ();
3258 error (_("No argument to \"set thread exception-port\" command."));
3259 steal_exc_port (thread, parse_and_eval_address (args));
3264 show_thread_cmd (char *args, int from_tty)
3266 struct proc *thread = cur_thread ();
3267 check_empty (args, "show thread");
3268 show_thread_run_cmd (0, from_tty);
3269 show_thread_pause_cmd (0, from_tty);
3270 if (thread->detach_sc != 0)
3271 show_thread_detach_sc_cmd (0, from_tty);
3276 thread_takeover_sc_cmd (char *args, int from_tty)
3278 struct proc *thread = cur_thread ();
3279 thread_basic_info_data_t _info;
3280 thread_basic_info_t info = &_info;
3281 mach_msg_type_number_t info_len = THREAD_BASIC_INFO_COUNT;
3283 thread_info (thread->port, THREAD_BASIC_INFO, (int *) &info, &info_len);
3285 error (("%s."), safe_strerror (err));
3286 thread->sc = info->suspend_count;
3288 printf_unfiltered ("Suspend count was %d.\n", thread->sc);
3290 vm_deallocate (mach_task_self (), (vm_address_t) info,
3291 info_len * sizeof (int));
3296 add_thread_commands (void)
3298 add_prefix_cmd ("thread", no_class, set_thread_cmd,
3299 _("Command prefix for setting thread properties."),
3300 &set_thread_cmd_list, "set thread ", 0, &setlist);
3301 add_prefix_cmd ("default", no_class, show_thread_cmd,
3302 _("Command prefix for setting default thread properties."),
3303 &set_thread_default_cmd_list, "set thread default ", 0,
3304 &set_thread_cmd_list);
3305 add_prefix_cmd ("thread", no_class, set_thread_default_cmd,
3306 _("Command prefix for showing thread properties."),
3307 &show_thread_cmd_list, "show thread ", 0, &showlist);
3308 add_prefix_cmd ("default", no_class, show_thread_default_cmd,
3309 _("Command prefix for showing default thread properties."),
3310 &show_thread_default_cmd_list, "show thread default ", 0,
3311 &show_thread_cmd_list);
3313 add_cmd ("pause", class_run, set_thread_pause_cmd, _("\
3314 Set whether the current thread is suspended while gdb has control.\n\
3315 A value of \"on\" takes effect immediately, otherwise nothing happens\n\
3316 until the next time the program is continued. This property normally\n\
3317 has no effect because the whole task is suspended, however, that may\n\
3318 be disabled with \"set task pause off\".\n\
3319 The default value is \"off\"."),
3320 &set_thread_cmd_list);
3321 add_cmd ("pause", no_class, show_thread_pause_cmd, _("\
3322 Show whether the current thread is suspended while gdb has control."),
3323 &show_thread_cmd_list);
3325 add_cmd ("run", class_run, set_thread_run_cmd,
3326 _("Set whether the current thread is allowed to run."),
3327 &set_thread_cmd_list);
3328 add_cmd ("run", no_class, show_thread_run_cmd,
3329 _("Show whether the current thread is allowed to run."),
3330 &show_thread_cmd_list);
3332 add_cmd ("detach-suspend-count", class_run, set_thread_detach_sc_cmd, _("\
3333 Set the suspend count will leave on the thread when detaching.\n\
3334 Note that this is relative to suspend count when gdb noticed the thread;\n\
3335 use the `thread takeover-suspend-count' to force it to an absolute value."),
3336 &set_thread_cmd_list);
3337 add_cmd ("detach-suspend-count", no_class, show_thread_detach_sc_cmd, _("\
3338 Show the suspend count will leave on the thread when detaching.\n\
3339 Note that this is relative to suspend count when gdb noticed the thread;\n\
3340 use the `thread takeover-suspend-count' to force it to an absolute value."),
3341 &show_thread_cmd_list);
3343 add_cmd ("exception-port", no_class, set_thread_exc_port_cmd, _("\
3344 Set the thread exception port to which we forward exceptions.\n\
3345 This overrides the task exception port.\n\
3346 The argument should be the value of the send right in the task."),
3347 &set_thread_cmd_list);
3348 add_alias_cmd ("excp", "exception-port", no_class, 1, &set_thread_cmd_list);
3349 add_alias_cmd ("exc-port", "exception-port", no_class, 1,
3350 &set_thread_cmd_list);
3352 add_cmd ("takeover-suspend-count", no_class, thread_takeover_sc_cmd, _("\
3353 Force the threads absolute suspend-count to be gdb's.\n\
3354 Prior to giving this command, gdb's thread suspend-counts are relative\n\
3355 to the thread's initial suspend-count when gdb notices the threads."),
3361 _initialize_gnu_nat (void)
3363 proc_server = getproc ();
3365 add_task_commands ();
3366 add_thread_commands ();
3367 add_setshow_boolean_cmd ("gnu-nat", class_maintenance,
3369 _("Set debugging output for the gnu backend."),
3370 _("Show debugging output for the gnu backend."),
3378 #ifdef FLUSH_INFERIOR_CACHE
3380 /* When over-writing code on some machines the I-Cache must be flushed
3381 explicitly, because it is not kept coherent by the lazy hardware.
3382 This definitely includes breakpoints, for instance, or else we
3383 end up looping in mysterious Bpt traps */
3386 flush_inferior_icache (CORE_ADDR pc, int amount)
3388 vm_machine_attribute_val_t flush = MATTR_VAL_ICACHE_FLUSH;
3391 ret = vm_machine_attribute (gnu_current_inf->task->port,
3396 if (ret != KERN_SUCCESS)
3397 warning (_("Error flushing inferior's cache : %s"), safe_strerror (ret));
3399 #endif /* FLUSH_INFERIOR_CACHE */