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/>. */
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>
63 #include "gdbthread.h"
64 #include "gdb_assert.h"
65 #include "gdb_obstack.h"
68 #include "inf-child.h"
70 #include "exc_request_S.h"
72 #include "process_reply_S.h"
73 #include "msg_reply_S.h"
74 #include "exc_request_U.h"
77 static process_t proc_server = MACH_PORT_NULL;
79 /* If we've sent a proc_wait_request to the proc server, the pid of the
80 process we asked about. We can only ever have one outstanding. */
81 int proc_wait_pid = 0;
83 /* The number of wait requests we've sent, and expect replies from. */
84 int proc_waits_pending = 0;
86 int gnu_debug_flag = 0;
90 static struct inf *make_inf ();
91 void inf_clear_wait (struct inf *inf);
92 void inf_cleanup (struct inf *inf);
93 void inf_startup (struct inf *inf, int pid);
94 int inf_update_suspends (struct inf *inf);
95 void inf_set_pid (struct inf *inf, pid_t pid);
96 void inf_validate_procs (struct inf *inf);
97 void inf_steal_exc_ports (struct inf *inf);
98 void inf_restore_exc_ports (struct inf *inf);
99 void inf_set_threads_resume_sc (struct inf *inf,
100 struct proc *run_thread,
102 int inf_set_threads_resume_sc_for_signal_thread (struct inf *inf);
103 void inf_suspend (struct inf *inf);
104 void inf_resume (struct inf *inf);
105 void inf_set_step_thread (struct inf *inf, struct proc *proc);
106 void inf_detach (struct inf *inf);
107 void inf_attach (struct inf *inf, int pid);
108 void inf_signal (struct inf *inf, enum gdb_signal sig);
109 void inf_continue (struct inf *inf);
111 #define inf_debug(_inf, msg, args...) \
112 do { struct inf *__inf = (_inf); \
113 debug ("{inf %d %s}: " msg, __inf->pid, \
114 host_address_to_string (__inf) , ##args); } while (0)
116 void proc_abort (struct proc *proc, int force);
117 struct proc *make_proc (struct inf *inf, mach_port_t port, int tid);
118 struct proc *_proc_free (struct proc *proc);
119 int proc_update_sc (struct proc *proc);
120 error_t proc_get_exception_port (struct proc *proc, mach_port_t * port);
121 error_t proc_set_exception_port (struct proc *proc, mach_port_t port);
122 static mach_port_t _proc_get_exc_port (struct proc *proc);
123 void proc_steal_exc_port (struct proc *proc, mach_port_t exc_port);
124 void proc_restore_exc_port (struct proc *proc);
125 int proc_trace (struct proc *proc, int set);
127 /* Evaluate RPC_EXPR in a scope with the variables MSGPORT and REFPORT bound
128 to INF's msg port and task port respectively. If it has no msg port,
129 EIEIO is returned. INF must refer to a running process! */
130 #define INF_MSGPORT_RPC(inf, rpc_expr) \
131 HURD_MSGPORT_RPC (proc_getmsgport (proc_server, inf->pid, &msgport), \
132 (refport = inf->task->port, 0), 0, \
133 msgport ? (rpc_expr) : EIEIO)
135 /* Like INF_MSGPORT_RPC, but will also resume the signal thread to ensure
136 there's someone around to deal with the RPC (and resuspend things
137 afterwards). This effects INF's threads' resume_sc count. */
138 #define INF_RESUME_MSGPORT_RPC(inf, rpc_expr) \
139 (inf_set_threads_resume_sc_for_signal_thread (inf) \
142 __e = INF_MSGPORT_RPC (inf, rpc_expr); \
148 /* The state passed by an exception message. */
151 int exception; /* The exception code. */
153 mach_port_t handler; /* The real exception port to handle this. */
154 mach_port_t reply; /* The reply port from the exception call. */
157 /* The results of the last wait an inf did. */
160 struct target_waitstatus status; /* The status returned to gdb. */
161 struct exc_state exc; /* The exception that caused us to return. */
162 struct proc *thread; /* The thread in question. */
163 int suppress; /* Something trivial happened. */
166 /* The state of an inferior. */
169 /* Fields describing the current inferior. */
171 struct proc *task; /* The mach task. */
172 struct proc *threads; /* A linked list of all threads in TASK. */
174 /* True if THREADS needn't be validated by querying the task. We
175 assume that we and the task in question are the only ones
176 frobbing the thread list, so as long as we don't let any code
177 run, we don't have to worry about THREADS changing. */
178 int threads_up_to_date;
180 pid_t pid; /* The real system PID. */
182 struct inf_wait wait; /* What to return from target_wait. */
184 /* One thread proc in INF may be in `single-stepping mode'. This
186 struct proc *step_thread;
188 /* The thread we think is the signal thread. */
189 struct proc *signal_thread;
191 mach_port_t event_port; /* Where we receive various msgs. */
193 /* True if we think at least one thread in the inferior could currently be
195 unsigned int running:1;
197 /* True if the process has stopped (in the proc server sense). Note that
198 since a proc server `stop' leaves the signal thread running, the inf can
199 be RUNNING && STOPPED... */
200 unsigned int stopped:1;
202 /* True if the inferior has no message port. */
203 unsigned int nomsg:1;
205 /* True if the inferior is traced. */
206 unsigned int traced:1;
208 /* True if we shouldn't try waiting for the inferior, usually because we
209 can't for some reason. */
210 unsigned int no_wait:1;
212 /* When starting a new inferior, we don't try to validate threads until all
213 the proper execs have been done, which this flag states we still
215 unsigned int pending_execs:1;
217 /* Fields describing global state. */
219 /* The task suspend count used when gdb has control. This is normally 1 to
220 make things easier for us, but sometimes (like when attaching to vital
221 system servers) it may be desirable to let the task continue to run
222 (pausing individual threads as necessary). */
225 /* The task suspend count left when detaching from a task. */
228 /* The initial values used for the run_sc and pause_sc of newly discovered
229 threads -- see the definition of those fields in struct proc. */
230 int default_thread_run_sc;
231 int default_thread_pause_sc;
232 int default_thread_detach_sc;
234 /* True if the process should be traced when started/attached. Newly
235 started processes *must* be traced at first to exec them properly, but
236 if this is false, tracing is turned off as soon it has done so. */
239 /* True if exceptions from the inferior process should be trapped. This
240 must be on to use breakpoints. */
246 __proc_pid (struct proc *proc)
248 return proc->inf->pid;
252 /* Update PROC's real suspend count to match it's desired one. Returns true
253 if we think PROC is now in a runnable state. */
255 proc_update_sc (struct proc *proc)
259 int delta = proc->sc - proc->cur_sc;
262 proc_debug (proc, "sc: %d --> %d", proc->cur_sc, proc->sc);
264 if (proc->sc == 0 && proc->state_changed)
265 /* Since PROC may start running, we must write back any state changes. */
267 gdb_assert (proc_is_thread (proc));
268 proc_debug (proc, "storing back changed thread state");
269 err = thread_set_state (proc->port, THREAD_STATE_FLAVOR,
270 (thread_state_t) &proc->state, THREAD_STATE_SIZE);
272 proc->state_changed = 0;
277 while (delta-- > 0 && !err)
279 if (proc_is_task (proc))
280 err = task_suspend (proc->port);
282 err = thread_suspend (proc->port);
287 while (delta++ < 0 && !err)
289 if (proc_is_task (proc))
290 err = task_resume (proc->port);
292 err = thread_resume (proc->port);
296 proc->cur_sc = proc->sc;
298 /* If we got an error, then the task/thread has disappeared. */
299 running = !err && proc->sc == 0;
301 proc_debug (proc, "is %s", err ? "dead" : running ? "running" : "suspended");
303 proc_debug (proc, "err = %s", safe_strerror (err));
308 proc->state_valid = proc->state_changed = 0;
309 proc->fetched_regs = 0;
316 /* Thread_abort is called on PROC if needed. PROC must be a thread proc.
317 If PROC is deemed `precious', then nothing is done unless FORCE is true.
318 In particular, a thread is precious if it's running (in which case forcing
319 it includes suspending it first), or if it has an exception pending. */
321 proc_abort (struct proc *proc, int force)
323 gdb_assert (proc_is_thread (proc));
327 struct inf *inf = proc->inf;
328 int running = (proc->cur_sc == 0 && inf->task->cur_sc == 0);
330 if (running && force)
333 inf_update_suspends (proc->inf);
335 warning (_("Stopped %s."), proc_string (proc));
337 else if (proc == inf->wait.thread && inf->wait.exc.reply && !force)
338 /* An exception is pending on PROC, which don't mess with. */
342 /* We only abort the thread if it's not actually running. */
344 thread_abort (proc->port);
345 proc_debug (proc, "aborted");
349 proc_debug (proc, "not aborting");
353 /* Make sure that the state field in PROC is up to date, and return a pointer
354 to it, or 0 if something is wrong. If WILL_MODIFY is true, makes sure
355 that the thread is stopped and aborted first, and sets the state_changed
356 field in PROC to true. */
358 proc_get_state (struct proc *proc, int will_modify)
360 int was_aborted = proc->aborted;
362 proc_debug (proc, "updating state info%s",
363 will_modify ? " (with intention to modify)" : "");
365 proc_abort (proc, will_modify);
367 if (!was_aborted && proc->aborted)
368 /* PROC's state may have changed since we last fetched it. */
369 proc->state_valid = 0;
371 if (!proc->state_valid)
373 mach_msg_type_number_t state_size = THREAD_STATE_SIZE;
375 thread_get_state (proc->port, THREAD_STATE_FLAVOR,
376 (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: %lu", 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
436 been done. Stash away any existing exception port so we can
439 proc_steal_exc_port (struct proc *proc, mach_port_t exc_port)
441 mach_port_t cur_exc_port = _proc_get_exc_port (proc);
447 proc_debug (proc, "inserting exception port: %lu", exc_port);
449 if (cur_exc_port != exc_port)
450 /* Put in our exception port. */
451 err = proc_set_exception_port (proc, exc_port);
453 if (err || cur_exc_port == proc->exc_port)
454 /* We previously set the exception port, and it's still set. So we
455 just keep the old saved port which is what the proc set. */
458 mach_port_deallocate (mach_task_self (), cur_exc_port);
461 /* Keep a copy of PROC's old exception port so it can be restored. */
463 if (proc->saved_exc_port)
464 mach_port_deallocate (mach_task_self (), proc->saved_exc_port);
465 proc->saved_exc_port = cur_exc_port;
468 proc_debug (proc, "saved exception port: %lu", proc->saved_exc_port);
471 proc->exc_port = exc_port;
473 warning (_("Error setting exception port for %s: %s"),
474 proc_string (proc), safe_strerror (err));
478 /* If we previously replaced PROC's exception port, put back what we
479 found there at the time, unless *our* exception port has since been
480 overwritten, in which case who knows what's going on. */
482 proc_restore_exc_port (struct proc *proc)
484 mach_port_t cur_exc_port = _proc_get_exc_port (proc);
490 proc_debug (proc, "restoring real exception port");
492 if (proc->exc_port == cur_exc_port)
493 /* Our's is still there. */
494 err = proc_set_exception_port (proc, proc->saved_exc_port);
496 if (proc->saved_exc_port)
497 mach_port_deallocate (mach_task_self (), proc->saved_exc_port);
498 proc->saved_exc_port = MACH_PORT_NULL;
501 proc->exc_port = MACH_PORT_NULL;
503 warning (_("Error setting exception port for %s: %s"),
504 proc_string (proc), safe_strerror (err));
509 /* Turns hardware tracing in PROC on or off when SET is true or false,
510 respectively. Returns true on success. */
512 proc_trace (struct proc *proc, int set)
514 thread_state_t state = proc_get_state (proc, 1);
517 return 0; /* The thread must be dead. */
519 proc_debug (proc, "tracing %s", set ? "on" : "off");
523 /* XXX We don't get the exception unless the thread has its own
524 exception port???? */
525 if (proc->exc_port == MACH_PORT_NULL)
526 proc_steal_exc_port (proc, proc->inf->event_port);
527 THREAD_STATE_SET_TRACED (state);
530 THREAD_STATE_CLEAR_TRACED (state);
536 /* A variable from which to assign new TIDs. */
537 static int next_thread_id = 1;
539 /* Returns a new proc structure with the given fields. Also adds a
540 notification for PORT becoming dead to be sent to INF's notify port. */
542 make_proc (struct inf *inf, mach_port_t port, int tid)
545 mach_port_t prev_port = MACH_PORT_NULL;
546 struct proc *proc = xmalloc (sizeof (struct proc));
552 proc->saved_exc_port = MACH_PORT_NULL;
553 proc->exc_port = MACH_PORT_NULL;
558 /* Note that these are all the values for threads; the task simply uses the
559 corresponding field in INF directly. */
560 proc->run_sc = inf->default_thread_run_sc;
561 proc->pause_sc = inf->default_thread_pause_sc;
562 proc->detach_sc = inf->default_thread_detach_sc;
563 proc->resume_sc = proc->run_sc;
567 proc->state_valid = 0;
568 proc->state_changed = 0;
570 proc_debug (proc, "is new");
572 /* Get notified when things die. */
574 mach_port_request_notification (mach_task_self (), port,
575 MACH_NOTIFY_DEAD_NAME, 1,
577 MACH_MSG_TYPE_MAKE_SEND_ONCE,
580 warning (_("Couldn't request notification for port %lu: %s"),
581 port, safe_strerror (err));
584 proc_debug (proc, "notifications to: %lu", inf->event_port);
585 if (prev_port != MACH_PORT_NULL)
586 mach_port_deallocate (mach_task_self (), prev_port);
589 if (inf->want_exceptions)
591 if (proc_is_task (proc))
592 /* Make the task exception port point to us. */
593 proc_steal_exc_port (proc, inf->event_port);
595 /* Just clear thread exception ports -- they default to the
597 proc_steal_exc_port (proc, MACH_PORT_NULL);
603 /* Frees PROC and any resources it uses, and returns the value of PROC's
606 _proc_free (struct proc *proc)
608 struct inf *inf = proc->inf;
609 struct proc *next = proc->next;
611 proc_debug (proc, "freeing...");
613 if (proc == inf->step_thread)
614 /* Turn off single stepping. */
615 inf_set_step_thread (inf, 0);
616 if (proc == inf->wait.thread)
617 inf_clear_wait (inf);
618 if (proc == inf->signal_thread)
619 inf->signal_thread = 0;
621 if (proc->port != MACH_PORT_NULL)
623 if (proc->exc_port != MACH_PORT_NULL)
624 /* Restore the original exception port. */
625 proc_restore_exc_port (proc);
626 if (proc->cur_sc != 0)
627 /* Resume the thread/task. */
630 proc_update_sc (proc);
632 mach_port_deallocate (mach_task_self (), proc->port);
643 struct inf *inf = xmalloc (sizeof (struct inf));
647 inf->threads_up_to_date = 0;
649 inf->wait.status.kind = TARGET_WAITKIND_SPURIOUS;
650 inf->wait.thread = 0;
651 inf->wait.exc.handler = MACH_PORT_NULL;
652 inf->wait.exc.reply = MACH_PORT_NULL;
653 inf->step_thread = 0;
654 inf->signal_thread = 0;
655 inf->event_port = MACH_PORT_NULL;
661 inf->pending_execs = 0;
664 inf->default_thread_run_sc = 0;
665 inf->default_thread_pause_sc = 0;
666 inf->default_thread_detach_sc = 0;
667 inf->want_signals = 1; /* By default */
668 inf->want_exceptions = 1; /* By default */
673 /* Clear INF's target wait status. */
675 inf_clear_wait (struct inf *inf)
677 inf_debug (inf, "clearing wait");
678 inf->wait.status.kind = TARGET_WAITKIND_SPURIOUS;
679 inf->wait.thread = 0;
680 inf->wait.suppress = 0;
681 if (inf->wait.exc.handler != MACH_PORT_NULL)
683 mach_port_deallocate (mach_task_self (), inf->wait.exc.handler);
684 inf->wait.exc.handler = MACH_PORT_NULL;
686 if (inf->wait.exc.reply != MACH_PORT_NULL)
688 mach_port_deallocate (mach_task_self (), inf->wait.exc.reply);
689 inf->wait.exc.reply = MACH_PORT_NULL;
695 inf_cleanup (struct inf *inf)
697 inf_debug (inf, "cleanup");
699 inf_clear_wait (inf);
701 inf_set_pid (inf, -1);
708 inf->pending_execs = 0;
712 mach_port_destroy (mach_task_self (), inf->event_port);
713 inf->event_port = MACH_PORT_NULL;
718 inf_startup (struct inf *inf, int pid)
722 inf_debug (inf, "startup: pid = %d", pid);
726 /* Make the port on which we receive all events. */
727 err = mach_port_allocate (mach_task_self (),
728 MACH_PORT_RIGHT_RECEIVE, &inf->event_port);
730 error (_("Error allocating event port: %s"), safe_strerror (err));
732 /* Make a send right for it, so we can easily copy it for other people. */
733 mach_port_insert_right (mach_task_self (), inf->event_port,
734 inf->event_port, MACH_MSG_TYPE_MAKE_SEND);
735 inf_set_pid (inf, pid);
739 /* Close current process, if any, and attach INF to process PORT. */
741 inf_set_pid (struct inf *inf, pid_t pid)
744 struct proc *task = inf->task;
746 inf_debug (inf, "setting pid: %d", pid);
749 task_port = MACH_PORT_NULL;
752 error_t err = proc_pid2task (proc_server, pid, &task_port);
755 error (_("Error getting task for pid %d: %s"),
756 pid, safe_strerror (err));
759 inf_debug (inf, "setting task: %lu", task_port);
762 task_suspend (task_port);
764 if (task && task->port != task_port)
767 inf_validate_procs (inf); /* Trash all the threads. */
768 _proc_free (task); /* And the task. */
771 if (task_port != MACH_PORT_NULL)
773 inf->task = make_proc (inf, task_port, PROC_TID_TASK);
774 inf->threads_up_to_date = 0;
781 /* Reflect task_suspend above. */
782 inf->task->sc = inf->task->cur_sc = 1;
789 /* Validates INF's stopped, nomsg and traced field from the actual
790 proc server state. Note that the traced field is only updated from
791 the proc server state if we do not have a message port. If we do
792 have a message port we'd better look at the tracemask itself. */
794 inf_validate_procinfo (struct inf *inf)
797 mach_msg_type_number_t noise_len = 0;
799 mach_msg_type_number_t pi_len = 0;
802 proc_getprocinfo (proc_server, inf->pid, &info_flags,
803 (procinfo_t *) &pi, &pi_len, &noise, &noise_len);
807 inf->stopped = !!(pi->state & PI_STOPPED);
808 inf->nomsg = !!(pi->state & PI_NOMSG);
810 inf->traced = !!(pi->state & PI_TRACED);
811 vm_deallocate (mach_task_self (), (vm_address_t) pi, pi_len);
813 vm_deallocate (mach_task_self (), (vm_address_t) noise, noise_len);
817 /* Validates INF's task suspend count. If it's higher than we expect,
818 verify with the user before `stealing' the extra count. */
820 inf_validate_task_sc (struct inf *inf)
823 mach_msg_type_number_t noise_len = 0;
825 mach_msg_type_number_t pi_len = 0;
826 int info_flags = PI_FETCH_TASKINFO;
827 int suspend_count = -1;
831 err = proc_getprocinfo (proc_server, inf->pid, &info_flags,
832 (procinfo_t *) &pi, &pi_len, &noise, &noise_len);
835 inf->task->dead = 1; /* oh well */
839 if (inf->task->cur_sc < pi->taskinfo.suspend_count && suspend_count == -1)
841 /* The proc server might have suspended the task while stopping
842 it. This happens when the task is handling a traced signal.
843 Refetch the suspend count. The proc server should be
844 finished stopping the task by now. */
845 suspend_count = pi->taskinfo.suspend_count;
849 suspend_count = pi->taskinfo.suspend_count;
851 vm_deallocate (mach_task_self (), (vm_address_t) pi, pi_len);
853 vm_deallocate (mach_task_self (), (vm_address_t) pi, pi_len);
855 if (inf->task->cur_sc < suspend_count)
859 target_terminal_ours (); /* Allow I/O. */
860 abort = !query (_("Pid %d has an additional task suspend count of %d;"
861 " clear it? "), inf->pid,
862 suspend_count - inf->task->cur_sc);
863 target_terminal_inferior (); /* Give it back to the child. */
866 error (_("Additional task suspend count left untouched."));
868 inf->task->cur_sc = suspend_count;
872 /* Turns tracing for INF on or off, depending on ON, unless it already
873 is. If INF is running, the resume_sc count of INF's threads will
874 be modified, and the signal thread will briefly be run to change
877 inf_set_traced (struct inf *inf, int on)
879 if (on == inf->traced)
882 if (inf->task && !inf->task->dead)
883 /* Make it take effect immediately. */
885 sigset_t mask = on ? ~(sigset_t) 0 : 0;
887 INF_RESUME_MSGPORT_RPC (inf, msg_set_init_int (msgport, refport,
888 INIT_TRACEMASK, mask));
893 warning (_("Can't modify tracing state for pid %d: %s"),
894 inf->pid, "No signal thread");
898 warning (_("Can't modify tracing state for pid %d: %s"),
899 inf->pid, safe_strerror (err));
908 /* Makes all the real suspend count deltas of all the procs in INF
909 match the desired values. Careful to always do thread/task suspend
910 counts in the safe order. Returns true if at least one thread is
911 thought to be running. */
913 inf_update_suspends (struct inf *inf)
915 struct proc *task = inf->task;
917 /* We don't have to update INF->threads even though we're iterating over it
918 because we'll change a thread only if it already has an existing proc
920 inf_debug (inf, "updating suspend counts");
925 int task_running = (task->sc == 0), thread_running = 0;
927 if (task->sc > task->cur_sc)
928 /* The task is becoming _more_ suspended; do before any threads. */
929 task_running = proc_update_sc (task);
931 if (inf->pending_execs)
932 /* When we're waiting for an exec, things may be happening behind our
933 back, so be conservative. */
936 /* Do all the thread suspend counts. */
937 for (thread = inf->threads; thread; thread = thread->next)
938 thread_running |= proc_update_sc (thread);
940 if (task->sc != task->cur_sc)
941 /* We didn't do the task first, because we wanted to wait for the
942 threads; do it now. */
943 task_running = proc_update_sc (task);
945 inf_debug (inf, "%srunning...",
946 (thread_running && task_running) ? "" : "not ");
948 inf->running = thread_running && task_running;
950 /* Once any thread has executed some code, we can't depend on the
951 threads list any more. */
953 inf->threads_up_to_date = 0;
962 /* Converts a GDB pid to a struct proc. */
964 inf_tid_to_thread (struct inf *inf, int tid)
966 struct proc *thread = inf->threads;
969 if (thread->tid == tid)
972 thread = thread->next;
976 /* Converts a thread port to a struct proc. */
978 inf_port_to_thread (struct inf *inf, mach_port_t port)
980 struct proc *thread = inf->threads;
983 if (thread->port == port)
986 thread = thread->next;
991 /* Make INF's list of threads be consistent with reality of TASK. */
993 inf_validate_procs (struct inf *inf)
995 thread_array_t threads;
996 mach_msg_type_number_t num_threads, i;
997 struct proc *task = inf->task;
999 /* If no threads are currently running, this function will guarantee that
1000 things are up to date. The exception is if there are zero threads --
1001 then it is almost certainly in an odd state, and probably some outside
1002 agent will create threads. */
1003 inf->threads_up_to_date = inf->threads ? !inf->running : 0;
1007 error_t err = task_threads (task->port, &threads, &num_threads);
1009 inf_debug (inf, "fetching threads");
1011 /* TASK must be dead. */
1021 inf_debug (inf, "no task");
1025 /* Make things normally linear. */
1026 mach_msg_type_number_t search_start = 0;
1027 /* Which thread in PROCS corresponds to each task thread, & the task. */
1028 struct proc *matched[num_threads + 1];
1029 /* The last thread in INF->threads, so we can add to the end. */
1030 struct proc *last = 0;
1031 /* The current thread we're considering. */
1032 struct proc *thread = inf->threads;
1034 memset (matched, 0, sizeof (matched));
1038 mach_msg_type_number_t left;
1040 for (i = search_start, left = num_threads; left; i++, left--)
1042 if (i >= num_threads)
1043 i -= num_threads; /* I wrapped around. */
1044 if (thread->port == threads[i])
1045 /* We already know about this thread. */
1047 matched[i] = thread;
1049 thread = thread->next;
1057 proc_debug (thread, "died!");
1058 thread->port = MACH_PORT_NULL;
1059 thread = _proc_free (thread); /* THREAD is dead. */
1061 last->next = thread;
1063 inf->threads = thread;
1067 for (i = 0; i < num_threads; i++)
1070 /* Throw away the duplicate send right. */
1071 mach_port_deallocate (mach_task_self (), threads[i]);
1073 /* THREADS[I] is a thread we don't know about yet! */
1077 thread = make_proc (inf, threads[i], next_thread_id++);
1079 last->next = thread;
1081 inf->threads = thread;
1083 proc_debug (thread, "new thread: %lu", threads[i]);
1085 ptid = ptid_build (inf->pid, thread->tid, 0);
1087 /* Tell GDB's generic thread code. */
1089 if (ptid_equal (inferior_ptid, pid_to_ptid (inf->pid)))
1090 /* This is the first time we're hearing about thread
1091 ids, after a fork-child. */
1092 thread_change_ptid (inferior_ptid, ptid);
1093 else if (inf->pending_execs != 0)
1094 /* This is a shell thread. */
1095 add_thread_silent (ptid);
1101 vm_deallocate (mach_task_self (),
1102 (vm_address_t) threads, (num_threads * sizeof (thread_t)));
1107 /* Makes sure that INF's thread list is synced with the actual process. */
1109 inf_update_procs (struct inf *inf)
1113 if (!inf->threads_up_to_date)
1114 inf_validate_procs (inf);
1118 /* Sets the resume_sc of each thread in inf. That of RUN_THREAD is set to 0,
1119 and others are set to their run_sc if RUN_OTHERS is true, and otherwise
1122 inf_set_threads_resume_sc (struct inf *inf,
1123 struct proc *run_thread, int run_others)
1125 struct proc *thread;
1127 inf_update_procs (inf);
1128 for (thread = inf->threads; thread; thread = thread->next)
1129 if (thread == run_thread)
1130 thread->resume_sc = 0;
1131 else if (run_others)
1132 thread->resume_sc = thread->run_sc;
1134 thread->resume_sc = thread->pause_sc;
1138 /* Cause INF to continue execution immediately; individual threads may still
1139 be suspended (but their suspend counts will be updated). */
1141 inf_resume (struct inf *inf)
1143 struct proc *thread;
1145 inf_update_procs (inf);
1147 for (thread = inf->threads; thread; thread = thread->next)
1148 thread->sc = thread->resume_sc;
1152 if (!inf->pending_execs)
1153 /* Try to make sure our task count is correct -- in the case where
1154 we're waiting for an exec though, things are too volatile, so just
1155 assume things will be reasonable (which they usually will be). */
1156 inf_validate_task_sc (inf);
1160 inf_update_suspends (inf);
1163 /* Cause INF to stop execution immediately; individual threads may still
1166 inf_suspend (struct inf *inf)
1168 struct proc *thread;
1170 inf_update_procs (inf);
1172 for (thread = inf->threads; thread; thread = thread->next)
1173 thread->sc = thread->pause_sc;
1176 inf->task->sc = inf->pause_sc;
1178 inf_update_suspends (inf);
1182 /* INF has one thread PROC that is in single-stepping mode. This
1183 function changes it to be PROC, changing any old step_thread to be
1184 a normal one. A PROC of 0 clears any existing value. */
1186 inf_set_step_thread (struct inf *inf, struct proc *thread)
1188 gdb_assert (!thread || proc_is_thread (thread));
1191 inf_debug (inf, "setting step thread: %d/%d", inf->pid, thread->tid);
1193 inf_debug (inf, "clearing step thread");
1195 if (inf->step_thread != thread)
1197 if (inf->step_thread && inf->step_thread->port != MACH_PORT_NULL)
1198 if (!proc_trace (inf->step_thread, 0))
1200 if (thread && proc_trace (thread, 1))
1201 inf->step_thread = thread;
1203 inf->step_thread = 0;
1208 /* Set up the thread resume_sc's so that only the signal thread is running
1209 (plus whatever other thread are set to always run). Returns true if we
1210 did so, or false if we can't find a signal thread. */
1212 inf_set_threads_resume_sc_for_signal_thread (struct inf *inf)
1214 if (inf->signal_thread)
1216 inf_set_threads_resume_sc (inf, inf->signal_thread, 0);
1224 inf_update_signal_thread (struct inf *inf)
1226 /* XXX for now we assume that if there's a msgport, the 2nd thread is
1227 the signal thread. */
1228 inf->signal_thread = inf->threads ? inf->threads->next : 0;
1232 /* Detachs from INF's inferior task, letting it run once again... */
1234 inf_detach (struct inf *inf)
1236 struct proc *task = inf->task;
1238 inf_debug (inf, "detaching...");
1240 inf_clear_wait (inf);
1241 inf_set_step_thread (inf, 0);
1245 struct proc *thread;
1247 inf_validate_procinfo (inf);
1249 inf_set_traced (inf, 0);
1255 inf_signal (inf, GDB_SIGNAL_0);
1258 proc_restore_exc_port (task);
1259 task->sc = inf->detach_sc;
1261 for (thread = inf->threads; thread; thread = thread->next)
1263 proc_restore_exc_port (thread);
1264 thread->sc = thread->detach_sc;
1267 inf_update_suspends (inf);
1273 /* Attaches INF to the process with process id PID, returning it in a
1274 suspended state suitable for debugging. */
1276 inf_attach (struct inf *inf, int pid)
1278 inf_debug (inf, "attaching: %d", pid);
1283 inf_startup (inf, pid);
1287 /* Makes sure that we've got our exception ports entrenched in the process. */
1289 inf_steal_exc_ports (struct inf *inf)
1291 struct proc *thread;
1293 inf_debug (inf, "stealing exception ports");
1295 inf_set_step_thread (inf, 0); /* The step thread is special. */
1297 proc_steal_exc_port (inf->task, inf->event_port);
1298 for (thread = inf->threads; thread; thread = thread->next)
1299 proc_steal_exc_port (thread, MACH_PORT_NULL);
1302 /* Makes sure the process has its own exception ports. */
1304 inf_restore_exc_ports (struct inf *inf)
1306 struct proc *thread;
1308 inf_debug (inf, "restoring exception ports");
1310 inf_set_step_thread (inf, 0); /* The step thread is special. */
1312 proc_restore_exc_port (inf->task);
1313 for (thread = inf->threads; thread; thread = thread->next)
1314 proc_restore_exc_port (thread);
1318 /* Deliver signal SIG to INF. If INF is stopped, delivering a signal, even
1319 signal 0, will continue it. INF is assumed to be in a paused state, and
1320 the resume_sc's of INF's threads may be affected. */
1322 inf_signal (struct inf *inf, enum gdb_signal sig)
1325 int host_sig = gdb_signal_to_host (sig);
1327 #define NAME gdb_signal_to_name (sig)
1329 if (host_sig >= _NSIG)
1330 /* A mach exception. Exceptions are encoded in the signal space by
1331 putting them after _NSIG; this assumes they're positive (and not
1332 extremely large)! */
1334 struct inf_wait *w = &inf->wait;
1336 if (w->status.kind == TARGET_WAITKIND_STOPPED
1337 && w->status.value.sig == sig
1338 && w->thread && !w->thread->aborted)
1339 /* We're passing through the last exception we received. This is
1340 kind of bogus, because exceptions are per-thread whereas gdb
1341 treats signals as per-process. We just forward the exception to
1342 the correct handler, even it's not for the same thread as TID --
1343 i.e., we pretend it's global. */
1345 struct exc_state *e = &w->exc;
1347 inf_debug (inf, "passing through exception:"
1348 " task = %lu, thread = %lu, exc = %d"
1349 ", code = %d, subcode = %d",
1350 w->thread->port, inf->task->port,
1351 e->exception, e->code, e->subcode);
1353 exception_raise_request (e->handler,
1354 e->reply, MACH_MSG_TYPE_MOVE_SEND_ONCE,
1355 w->thread->port, inf->task->port,
1356 e->exception, e->code, e->subcode);
1359 error (_("Can't forward spontaneous exception (%s)."), NAME);
1362 /* A Unix signal. */
1364 /* The process is stopped and expecting a signal. Just send off a
1365 request and let it get handled when we resume everything. */
1367 inf_debug (inf, "sending %s to stopped process", NAME);
1369 INF_MSGPORT_RPC (inf,
1370 msg_sig_post_untraced_request (msgport,
1372 MACH_MSG_TYPE_MAKE_SEND_ONCE,
1376 /* Posting an untraced signal automatically continues it.
1377 We clear this here rather than when we get the reply
1378 because we'd rather assume it's not stopped when it
1379 actually is, than the reverse. */
1383 /* It's not expecting it. We have to let just the signal thread
1384 run, and wait for it to get into a reasonable state before we
1385 can continue the rest of the process. When we finally resume the
1386 process the signal we request will be the very first thing that
1389 inf_debug (inf, "sending %s to unstopped process"
1390 " (so resuming signal thread)", NAME);
1392 INF_RESUME_MSGPORT_RPC (inf,
1393 msg_sig_post_untraced (msgport, host_sig,
1398 /* Can't do too much... */
1399 warning (_("Can't deliver signal %s: No signal thread."), NAME);
1401 warning (_("Delivering signal %s: %s"), NAME, safe_strerror (err));
1407 /* Continue INF without delivering a signal. This is meant to be used
1408 when INF does not have a message port. */
1410 inf_continue (struct inf *inf)
1413 error_t err = proc_pid2proc (proc_server, inf->pid, &proc);
1417 inf_debug (inf, "continuing process");
1419 err = proc_mark_cont (proc);
1422 struct proc *thread;
1424 for (thread = inf->threads; thread; thread = thread->next)
1425 thread_resume (thread->port);
1432 warning (_("Can't continue process: %s"), safe_strerror (err));
1436 /* The inferior used for all gdb target ops. */
1437 struct inf *gnu_current_inf = 0;
1439 /* The inferior being waited for by gnu_wait. Since GDB is decidely not
1440 multi-threaded, we don't bother to lock this. */
1441 struct inf *waiting_inf;
1443 /* Wait for something to happen in the inferior, returning what in STATUS. */
1445 gnu_wait (struct target_ops *ops,
1446 ptid_t ptid, struct target_waitstatus *status, int options)
1450 mach_msg_header_t hdr;
1451 mach_msg_type_t type;
1455 struct proc *thread;
1456 struct inf *inf = gnu_current_inf;
1458 extern int exc_server (mach_msg_header_t *, mach_msg_header_t *);
1459 extern int msg_reply_server (mach_msg_header_t *, mach_msg_header_t *);
1460 extern int notify_server (mach_msg_header_t *, mach_msg_header_t *);
1461 extern int process_reply_server (mach_msg_header_t *, mach_msg_header_t *);
1463 gdb_assert (inf->task);
1465 if (!inf->threads && !inf->pending_execs)
1466 /* No threads! Assume that maybe some outside agency is frobbing our
1467 task, and really look for new threads. If we can't find any, just tell
1468 the user to try again later. */
1470 inf_validate_procs (inf);
1471 if (!inf->threads && !inf->task->dead)
1472 error (_("There are no threads; try again later."));
1477 inf_debug (inf, "waiting for: %s", target_pid_to_str (ptid));
1480 if (proc_wait_pid != inf->pid && !inf->no_wait)
1481 /* Always get information on events from the proc server. */
1483 inf_debug (inf, "requesting wait on pid %d", inf->pid);
1486 /* The proc server is single-threaded, and only allows a single
1487 outstanding wait request, so we have to cancel the previous one. */
1489 inf_debug (inf, "cancelling previous wait on pid %d", proc_wait_pid);
1490 interrupt_operation (proc_server, 0);
1494 proc_wait_request (proc_server, inf->event_port, inf->pid, WUNTRACED);
1496 warning (_("wait request failed: %s"), safe_strerror (err));
1499 inf_debug (inf, "waits pending: %d", proc_waits_pending);
1500 proc_wait_pid = inf->pid;
1501 /* Even if proc_waits_pending was > 0 before, we still won't
1502 get any other replies, because it was either from a
1503 different INF, or a different process attached to INF --
1504 and the event port, which is the wait reply port, changes
1505 when you switch processes. */
1506 proc_waits_pending = 1;
1510 inf_clear_wait (inf);
1512 /* What can happen? (1) Dead name notification; (2) Exceptions arrive;
1513 (3) wait reply from the proc server. */
1515 inf_debug (inf, "waiting for an event...");
1516 err = mach_msg (&msg.hdr, MACH_RCV_MSG | MACH_RCV_INTERRUPT,
1517 0, sizeof (struct msg), inf->event_port,
1518 MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
1520 /* Re-suspend the task. */
1523 if (!inf->task && inf->pending_execs)
1524 /* When doing an exec, it's possible that the old task wasn't reused
1525 (e.g., setuid execs). So if the task seems to have disappeared,
1526 attempt to refetch it, as the pid should still be the same. */
1527 inf_set_pid (inf, inf->pid);
1529 if (err == EMACH_RCV_INTERRUPTED)
1530 inf_debug (inf, "interrupted");
1532 error (_("Couldn't wait for an event: %s"), safe_strerror (err));
1537 mach_msg_header_t hdr;
1538 mach_msg_type_t err_type;
1544 inf_debug (inf, "event: msgid = %d", msg.hdr.msgh_id);
1546 /* Handle what we got. */
1547 if (!notify_server (&msg.hdr, &reply.hdr)
1548 && !exc_server (&msg.hdr, &reply.hdr)
1549 && !process_reply_server (&msg.hdr, &reply.hdr)
1550 && !msg_reply_server (&msg.hdr, &reply.hdr))
1551 /* Whatever it is, it's something strange. */
1552 error (_("Got a strange event, msg id = %d."), msg.hdr.msgh_id);
1555 error (_("Handling event, msgid = %d: %s"),
1556 msg.hdr.msgh_id, safe_strerror (reply.err));
1559 if (inf->pending_execs)
1560 /* We're waiting for the inferior to finish execing. */
1562 struct inf_wait *w = &inf->wait;
1563 enum target_waitkind kind = w->status.kind;
1565 if (kind == TARGET_WAITKIND_SPURIOUS)
1566 /* Since gdb is actually counting the number of times the inferior
1567 stops, expecting one stop per exec, we only return major events
1571 inf_debug (inf, "pending_execs, ignoring minor event");
1573 else if (kind == TARGET_WAITKIND_STOPPED
1574 && w->status.value.sig == GDB_SIGNAL_TRAP)
1575 /* Ah hah! A SIGTRAP from the inferior while starting up probably
1576 means we've succesfully completed an exec! */
1578 inf_debug (inf, "one pending exec completed");
1580 else if (kind == TARGET_WAITKIND_STOPPED)
1581 /* It's possible that this signal is because of a crashed process
1582 being handled by the hurd crash server; in this case, the process
1583 will have an extra task suspend, which we need to know about.
1584 Since the code in inf_resume that normally checks for this is
1585 disabled while INF->pending_execs, we do the check here instead. */
1586 inf_validate_task_sc (inf);
1589 if (inf->wait.suppress)
1590 /* Some totally spurious event happened that we don't consider
1591 worth returning to gdb. Just keep waiting. */
1593 inf_debug (inf, "suppressing return, rewaiting...");
1598 /* Pass back out our results. */
1599 memcpy (status, &inf->wait.status, sizeof (*status));
1601 thread = inf->wait.thread;
1603 ptid = ptid_build (inf->pid, thread->tid, 0);
1604 else if (ptid_equal (ptid, minus_one_ptid))
1605 thread = inf_tid_to_thread (inf, -1);
1607 thread = inf_tid_to_thread (inf, ptid_get_lwp (ptid));
1609 if (!thread || thread->port == MACH_PORT_NULL)
1611 /* TID is dead; try and find a new thread. */
1612 if (inf_update_procs (inf) && inf->threads)
1613 ptid = ptid_build (inf->pid, inf->threads->tid, 0); /* The first
1617 ptid = inferior_ptid; /* let wait_for_inferior handle exit case */
1621 && !ptid_equal (ptid, minus_one_ptid)
1622 && status->kind != TARGET_WAITKIND_SPURIOUS
1623 && inf->pause_sc == 0 && thread->pause_sc == 0)
1624 /* If something actually happened to THREAD, make sure we
1628 inf_update_suspends (inf);
1631 inf_debug (inf, "returning ptid = %s, status = %s (%d)",
1632 target_pid_to_str (ptid),
1633 status->kind == TARGET_WAITKIND_EXITED ? "EXITED"
1634 : status->kind == TARGET_WAITKIND_STOPPED ? "STOPPED"
1635 : status->kind == TARGET_WAITKIND_SIGNALLED ? "SIGNALLED"
1636 : status->kind == TARGET_WAITKIND_LOADED ? "LOADED"
1637 : status->kind == TARGET_WAITKIND_SPURIOUS ? "SPURIOUS"
1639 status->value.integer);
1645 /* The rpc handler called by exc_server. */
1647 S_exception_raise_request (mach_port_t port, mach_port_t reply_port,
1648 thread_t thread_port, task_t task_port,
1649 int exception, int code, int subcode)
1651 struct inf *inf = waiting_inf;
1652 struct proc *thread = inf_port_to_thread (inf, thread_port);
1654 inf_debug (waiting_inf,
1655 "thread = %lu, task = %lu, exc = %d, code = %d, subcode = %d",
1656 thread_port, task_port, exception, code, subcode);
1659 /* We don't know about thread? */
1661 inf_update_procs (inf);
1662 thread = inf_port_to_thread (inf, thread_port);
1664 /* Give up, the generating thread is gone. */
1668 mach_port_deallocate (mach_task_self (), thread_port);
1669 mach_port_deallocate (mach_task_self (), task_port);
1671 if (!thread->aborted)
1672 /* THREAD hasn't been aborted since this exception happened (abortion
1673 clears any exception state), so it must be real. */
1675 /* Store away the details; this will destroy any previous info. */
1676 inf->wait.thread = thread;
1678 inf->wait.status.kind = TARGET_WAITKIND_STOPPED;
1680 if (exception == EXC_BREAKPOINT)
1681 /* GDB likes to get SIGTRAP for breakpoints. */
1683 inf->wait.status.value.sig = GDB_SIGNAL_TRAP;
1684 mach_port_deallocate (mach_task_self (), reply_port);
1687 /* Record the exception so that we can forward it later. */
1689 if (thread->exc_port == port)
1691 inf_debug (waiting_inf, "Handler is thread exception port <%lu>",
1692 thread->saved_exc_port);
1693 inf->wait.exc.handler = thread->saved_exc_port;
1697 inf_debug (waiting_inf, "Handler is task exception port <%lu>",
1698 inf->task->saved_exc_port);
1699 inf->wait.exc.handler = inf->task->saved_exc_port;
1700 gdb_assert (inf->task->exc_port == port);
1702 if (inf->wait.exc.handler != MACH_PORT_NULL)
1703 /* Add a reference to the exception handler. */
1704 mach_port_mod_refs (mach_task_self (),
1705 inf->wait.exc.handler, MACH_PORT_RIGHT_SEND,
1708 inf->wait.exc.exception = exception;
1709 inf->wait.exc.code = code;
1710 inf->wait.exc.subcode = subcode;
1711 inf->wait.exc.reply = reply_port;
1713 /* Exceptions are encoded in the signal space by putting
1714 them after _NSIG; this assumes they're positive (and not
1715 extremely large)! */
1716 inf->wait.status.value.sig =
1717 gdb_signal_from_host (_NSIG + exception);
1721 /* A supppressed exception, which ignore. */
1723 inf->wait.suppress = 1;
1724 mach_port_deallocate (mach_task_self (), reply_port);
1731 /* Fill in INF's wait field after a task has died without giving us more
1732 detailed information. */
1734 inf_task_died_status (struct inf *inf)
1736 warning (_("Pid %d died with unknown exit status, using SIGKILL."),
1738 inf->wait.status.kind = TARGET_WAITKIND_SIGNALLED;
1739 inf->wait.status.value.sig = GDB_SIGNAL_KILL;
1742 /* Notify server routines. The only real one is dead name notification. */
1744 do_mach_notify_dead_name (mach_port_t notify, mach_port_t dead_port)
1746 struct inf *inf = waiting_inf;
1748 inf_debug (waiting_inf, "port = %lu", dead_port);
1750 if (inf->task && inf->task->port == dead_port)
1752 proc_debug (inf->task, "is dead");
1753 inf->task->port = MACH_PORT_NULL;
1754 if (proc_wait_pid == inf->pid)
1755 /* We have a wait outstanding on the process, which will return more
1756 detailed information, so delay until we get that. */
1757 inf->wait.suppress = 1;
1759 /* We never waited for the process (maybe it wasn't a child), so just
1760 pretend it got a SIGKILL. */
1761 inf_task_died_status (inf);
1765 struct proc *thread = inf_port_to_thread (inf, dead_port);
1769 proc_debug (thread, "is dead");
1770 thread->port = MACH_PORT_NULL;
1773 if (inf->task->dead)
1774 /* Since the task is dead, its threads are dying with it. */
1775 inf->wait.suppress = 1;
1778 mach_port_deallocate (mach_task_self (), dead_port);
1779 inf->threads_up_to_date = 0; /* Just in case. */
1785 #define ILL_RPC(fun, ...) \
1786 extern kern_return_t fun (__VA_ARGS__); \
1787 kern_return_t fun (__VA_ARGS__) \
1789 warning (_("illegal rpc: %s"), #fun); \
1793 ILL_RPC (do_mach_notify_no_senders,
1794 mach_port_t notify, mach_port_mscount_t count)
1795 ILL_RPC (do_mach_notify_port_deleted,
1796 mach_port_t notify, mach_port_t name)
1797 ILL_RPC (do_mach_notify_msg_accepted,
1798 mach_port_t notify, mach_port_t name)
1799 ILL_RPC (do_mach_notify_port_destroyed,
1800 mach_port_t notify, mach_port_t name)
1801 ILL_RPC (do_mach_notify_send_once,
1804 /* Process_reply server routines. We only use process_wait_reply. */
1807 S_proc_wait_reply (mach_port_t reply, error_t err,
1808 int status, int sigcode, rusage_t rusage, pid_t pid)
1810 struct inf *inf = waiting_inf;
1812 inf_debug (inf, "err = %s, pid = %d, status = 0x%x, sigcode = %d",
1813 err ? safe_strerror (err) : "0", pid, status, sigcode);
1815 if (err && proc_wait_pid && (!inf->task || !inf->task->port))
1816 /* Ack. The task has died, but the task-died notification code didn't
1817 tell anyone because it thought a more detailed reply from the
1818 procserver was forthcoming. However, we now learn that won't
1819 happen... So we have to act like the task just died, and this time,
1821 inf_task_died_status (inf);
1823 if (--proc_waits_pending == 0)
1824 /* PROC_WAIT_PID represents the most recent wait. We will always get
1825 replies in order because the proc server is single threaded. */
1828 inf_debug (inf, "waits pending now: %d", proc_waits_pending);
1834 warning (_("Can't wait for pid %d: %s"),
1835 inf->pid, safe_strerror (err));
1838 /* Since we can't see the inferior's signals, don't trap them. */
1839 inf_set_traced (inf, 0);
1842 else if (pid == inf->pid)
1844 store_waitstatus (&inf->wait.status, status);
1845 if (inf->wait.status.kind == TARGET_WAITKIND_STOPPED)
1846 /* The process has sent us a signal, and stopped itself in a sane
1847 state pending our actions. */
1849 inf_debug (inf, "process has stopped itself");
1854 inf->wait.suppress = 1; /* Something odd happened. Ignore. */
1859 ILL_RPC (S_proc_setmsgport_reply,
1860 mach_port_t reply_port, kern_return_t return_code,
1861 mach_port_t oldmsgport)
1862 ILL_RPC (S_proc_getmsgport_reply,
1863 mach_port_t reply_port, kern_return_t return_code,
1864 mach_port_t msgports)
1865 ILL_RPC (S_proc_pid2task_reply,
1866 mach_port_t reply_port, kern_return_t return_code, mach_port_t task)
1867 ILL_RPC (S_proc_task2pid_reply,
1868 mach_port_t reply_port, kern_return_t return_code, pid_t pid)
1869 ILL_RPC (S_proc_task2proc_reply,
1870 mach_port_t reply_port, kern_return_t return_code, mach_port_t proc)
1871 ILL_RPC (S_proc_proc2task_reply,
1872 mach_port_t reply_port, kern_return_t return_code, mach_port_t task)
1873 ILL_RPC (S_proc_pid2proc_reply,
1874 mach_port_t reply_port, kern_return_t return_code, mach_port_t proc)
1875 ILL_RPC (S_proc_getprocinfo_reply,
1876 mach_port_t reply_port, kern_return_t return_code,
1877 int flags, procinfo_t procinfo, mach_msg_type_number_t procinfoCnt,
1878 data_t threadwaits, mach_msg_type_number_t threadwaitsCnt)
1879 ILL_RPC (S_proc_getprocargs_reply,
1880 mach_port_t reply_port, kern_return_t return_code,
1881 data_t procargs, mach_msg_type_number_t procargsCnt)
1882 ILL_RPC (S_proc_getprocenv_reply,
1883 mach_port_t reply_port, kern_return_t return_code,
1884 data_t procenv, mach_msg_type_number_t procenvCnt)
1885 ILL_RPC (S_proc_getloginid_reply,
1886 mach_port_t reply_port, kern_return_t return_code, pid_t login_id)
1887 ILL_RPC (S_proc_getloginpids_reply,
1888 mach_port_t reply_port, kern_return_t return_code,
1889 pidarray_t pids, mach_msg_type_number_t pidsCnt)
1890 ILL_RPC (S_proc_getlogin_reply,
1891 mach_port_t reply_port, kern_return_t return_code, string_t logname)
1892 ILL_RPC (S_proc_getsid_reply,
1893 mach_port_t reply_port, kern_return_t return_code, pid_t sid)
1894 ILL_RPC (S_proc_getsessionpgids_reply,
1895 mach_port_t reply_port, kern_return_t return_code,
1896 pidarray_t pgidset, mach_msg_type_number_t pgidsetCnt)
1897 ILL_RPC (S_proc_getsessionpids_reply,
1898 mach_port_t reply_port, kern_return_t return_code,
1899 pidarray_t pidset, mach_msg_type_number_t pidsetCnt)
1900 ILL_RPC (S_proc_getsidport_reply,
1901 mach_port_t reply_port, kern_return_t return_code,
1902 mach_port_t sessport)
1903 ILL_RPC (S_proc_getpgrp_reply,
1904 mach_port_t reply_port, kern_return_t return_code, pid_t pgrp)
1905 ILL_RPC (S_proc_getpgrppids_reply,
1906 mach_port_t reply_port, kern_return_t return_code,
1907 pidarray_t pidset, mach_msg_type_number_t pidsetCnt)
1908 ILL_RPC (S_proc_get_tty_reply,
1909 mach_port_t reply_port, kern_return_t return_code, mach_port_t tty)
1910 ILL_RPC (S_proc_getnports_reply,
1911 mach_port_t reply_port, kern_return_t return_code,
1912 mach_msg_type_number_t nports)
1913 ILL_RPC (S_proc_is_important_reply,
1914 mach_port_t reply_port, kern_return_t return_code,
1915 boolean_t essential)
1916 ILL_RPC (S_proc_get_code_reply,
1917 mach_port_t reply_port, kern_return_t return_code,
1918 vm_address_t start_code, vm_address_t end_code)
1920 /* Msg_reply server routines. We only use msg_sig_post_untraced_reply. */
1923 S_msg_sig_post_untraced_reply (mach_port_t reply, error_t err)
1925 struct inf *inf = waiting_inf;
1928 /* EBUSY is what we get when the crash server has grabbed control of the
1929 process and doesn't like what signal we tried to send it. Just act
1930 like the process stopped (using a signal of 0 should mean that the
1931 *next* time the user continues, it will pass signal 0, which the crash
1932 server should like). */
1934 inf->wait.status.kind = TARGET_WAITKIND_STOPPED;
1935 inf->wait.status.value.sig = GDB_SIGNAL_0;
1938 warning (_("Signal delivery failed: %s"), safe_strerror (err));
1941 /* We only get this reply when we've posted a signal to a process which we
1942 thought was stopped, and which we expected to continue after the signal.
1943 Given that the signal has failed for some reason, it's reasonable to
1944 assume it's still stopped. */
1947 inf->wait.suppress = 1;
1952 ILL_RPC (S_msg_sig_post_reply,
1953 mach_port_t reply, error_t err)
1955 /* Returns the number of messages queued for the receive right PORT. */
1956 static mach_port_msgcount_t
1957 port_msgs_queued (mach_port_t port)
1959 struct mach_port_status status;
1961 mach_port_get_receive_status (mach_task_self (), port, &status);
1966 return status.mps_msgcount;
1970 /* Resume execution of the inferior process.
1972 If STEP is nonzero, single-step it.
1973 If SIGNAL is nonzero, give it that signal.
1976 -1 true Single step the current thread allowing other threads to run.
1977 -1 false Continue the current thread allowing other threads to run.
1978 X true Single step the given thread, don't allow any others to run.
1979 X false Continue the given thread, do not allow any others to run.
1980 (Where X, of course, is anything except -1)
1982 Note that a resume may not `take' if there are pending exceptions/&c
1983 still unprocessed from the last resume we did (any given resume may result
1984 in multiple events returned by wait). */
1987 gnu_resume (struct target_ops *ops,
1988 ptid_t ptid, int step, enum gdb_signal sig)
1990 struct proc *step_thread = 0;
1992 struct inf *inf = gnu_current_inf;
1994 inf_debug (inf, "ptid = %s, step = %d, sig = %d",
1995 target_pid_to_str (ptid), step, sig);
1997 inf_validate_procinfo (inf);
1999 if (sig != GDB_SIGNAL_0 || inf->stopped)
2001 if (sig == GDB_SIGNAL_0 && inf->nomsg)
2004 inf_signal (inf, sig);
2006 else if (inf->wait.exc.reply != MACH_PORT_NULL)
2007 /* We received an exception to which we have chosen not to forward, so
2008 abort the faulting thread, which will perhaps retake it. */
2010 proc_abort (inf->wait.thread, 1);
2011 warning (_("Aborting %s with unforwarded exception %s."),
2012 proc_string (inf->wait.thread),
2013 gdb_signal_to_name (inf->wait.status.value.sig));
2016 if (port_msgs_queued (inf->event_port))
2017 /* If there are still messages in our event queue, don't bother resuming
2018 the process, as we're just going to stop it right away anyway. */
2021 inf_update_procs (inf);
2023 /* A specific PTID means `step only this process id'. */
2024 resume_all = ptid_equal (ptid, minus_one_ptid);
2027 /* Allow all threads to run, except perhaps single-stepping one. */
2029 inf_debug (inf, "running all threads; tid = %d",
2030 ptid_get_pid (inferior_ptid));
2031 ptid = inferior_ptid; /* What to step. */
2032 inf_set_threads_resume_sc (inf, 0, 1);
2035 /* Just allow a single thread to run. */
2037 struct proc *thread = inf_tid_to_thread (inf, ptid_get_lwp (ptid));
2040 error (_("Can't run single thread id %s: no such thread!"),
2041 target_pid_to_str (ptid));
2042 inf_debug (inf, "running one thread: %s", target_pid_to_str (ptid));
2043 inf_set_threads_resume_sc (inf, thread, 0);
2048 step_thread = inf_tid_to_thread (inf, ptid_get_lwp (ptid));
2050 warning (_("Can't step thread id %s: no such thread."),
2051 target_pid_to_str (ptid));
2053 inf_debug (inf, "stepping thread: %s", target_pid_to_str (ptid));
2055 if (step_thread != inf->step_thread)
2056 inf_set_step_thread (inf, step_thread);
2058 inf_debug (inf, "here we go...");
2064 gnu_kill_inferior (struct target_ops *ops)
2066 struct proc *task = gnu_current_inf->task;
2070 proc_debug (task, "terminating...");
2071 task_terminate (task->port);
2072 inf_set_pid (gnu_current_inf, -1);
2074 target_mourn_inferior ();
2077 /* Clean up after the inferior dies. */
2079 gnu_mourn_inferior (struct target_ops *ops)
2081 inf_debug (gnu_current_inf, "rip");
2082 inf_detach (gnu_current_inf);
2083 generic_mourn_inferior ();
2084 inf_child_maybe_unpush_target (ops);
2088 /* Fork an inferior process, and start debugging it. */
2090 /* Set INFERIOR_PID to the first thread available in the child, if any. */
2092 inf_pick_first_thread (void)
2094 if (gnu_current_inf->task && gnu_current_inf->threads)
2095 /* The first thread. */
2096 return gnu_current_inf->threads->tid;
2098 /* What may be the next thread. */
2099 return next_thread_id;
2105 if (!gnu_current_inf)
2106 gnu_current_inf = make_inf ();
2107 return gnu_current_inf;
2111 gnu_create_inferior (struct target_ops *ops,
2112 char *exec_file, char *allargs, char **env,
2115 struct inf *inf = cur_inf ();
2118 void trace_me (void)
2120 /* We're in the child; make this process stop as soon as it execs. */
2121 inf_debug (inf, "tracing self");
2122 if (ptrace (PTRACE_TRACEME) != 0)
2123 error (_("ptrace (PTRACE_TRACEME) failed!"));
2126 inf_debug (inf, "creating inferior");
2128 pid = fork_inferior (exec_file, allargs, env, trace_me,
2129 NULL, NULL, NULL, NULL);
2131 /* Attach to the now stopped child, which is actually a shell... */
2132 inf_debug (inf, "attaching to child: %d", pid);
2134 inf_attach (inf, pid);
2138 inf->pending_execs = 1;
2142 /* Now let the child run again, knowing that it will stop
2143 immediately because of the ptrace. */
2146 /* We now have thread info. */
2147 thread_change_ptid (inferior_ptid,
2148 ptid_build (inf->pid, inf_pick_first_thread (), 0));
2150 startup_inferior (START_INFERIOR_TRAPS_EXPECTED);
2151 inf->pending_execs = 0;
2153 inf_validate_procinfo (inf);
2154 inf_update_signal_thread (inf);
2155 inf_set_traced (inf, inf->want_signals);
2157 /* Execing the process will have trashed our exception ports; steal them
2158 back (or make sure they're restored if the user wants that). */
2159 if (inf->want_exceptions)
2160 inf_steal_exc_ports (inf);
2162 inf_restore_exc_ports (inf);
2166 /* Attach to process PID, then initialize for debugging it
2167 and wait for the trace-trap that results from attaching. */
2169 gnu_attach (struct target_ops *ops, char *args, int from_tty)
2173 struct inf *inf = cur_inf ();
2174 struct inferior *inferior;
2176 pid = parse_pid_to_attach (args);
2178 if (pid == getpid ()) /* Trying to masturbate? */
2179 error (_("I refuse to debug myself!"));
2183 exec_file = (char *) get_exec_file (0);
2186 printf_unfiltered ("Attaching to program `%s', pid %d\n",
2189 printf_unfiltered ("Attaching to pid %d\n", pid);
2191 gdb_flush (gdb_stdout);
2194 inf_debug (inf, "attaching to pid: %d", pid);
2196 inf_attach (inf, pid);
2200 inferior = current_inferior ();
2201 inferior_appeared (inferior, pid);
2202 inferior->attach_flag = 1;
2204 inf_update_procs (inf);
2206 inferior_ptid = ptid_build (pid, inf_pick_first_thread (), 0);
2208 /* We have to initialize the terminal settings now, since the code
2209 below might try to restore them. */
2210 target_terminal_init ();
2212 /* If the process was stopped before we attached, make it continue the next
2213 time the user does a continue. */
2214 inf_validate_procinfo (inf);
2216 inf_update_signal_thread (inf);
2217 inf_set_traced (inf, inf->want_signals);
2219 #if 0 /* Do we need this? */
2220 renumber_threads (0); /* Give our threads reasonable names. */
2225 /* Take a program previously attached to and detaches it.
2226 The program resumes execution and will no longer stop
2227 on signals, etc. We'd better not have left any breakpoints
2228 in the program or it'll die when it hits one. For this
2229 to work, it may be necessary for the process to have been
2230 previously attached. It *might* work if the program was
2231 started via fork. */
2233 gnu_detach (struct target_ops *ops, const char *args, int from_tty)
2239 char *exec_file = get_exec_file (0);
2242 printf_unfiltered ("Detaching from program `%s' pid %d\n",
2243 exec_file, gnu_current_inf->pid);
2245 printf_unfiltered ("Detaching from pid %d\n", gnu_current_inf->pid);
2246 gdb_flush (gdb_stdout);
2249 pid = gnu_current_inf->pid;
2251 inf_detach (gnu_current_inf);
2253 inferior_ptid = null_ptid;
2254 detach_inferior (pid);
2256 inf_child_maybe_unpush_target (ops);
2260 gnu_terminal_init (struct target_ops *self)
2262 gdb_assert (gnu_current_inf);
2263 child_terminal_init_with_pgrp (gnu_current_inf->pid);
2267 gnu_stop (struct target_ops *self, ptid_t ptid)
2269 error (_("to_stop target function not implemented"));
2273 gnu_thread_alive (struct target_ops *ops, ptid_t ptid)
2275 inf_update_procs (gnu_current_inf);
2276 return !!inf_tid_to_thread (gnu_current_inf,
2277 ptid_get_lwp (ptid));
2281 /* Read inferior task's LEN bytes from ADDR and copy it to MYADDR in
2282 gdb's address space. Return 0 on failure; number of bytes read
2285 gnu_read_inferior (task_t task, CORE_ADDR addr, gdb_byte *myaddr, int length)
2288 vm_address_t low_address = (vm_address_t) trunc_page (addr);
2289 vm_size_t aligned_length =
2290 (vm_size_t) round_page (addr + length) - low_address;
2292 mach_msg_type_number_t copy_count;
2294 /* Get memory from inferior with page aligned addresses. */
2295 err = vm_read (task, low_address, aligned_length, &copied, ©_count);
2299 err = hurd_safe_copyin (myaddr, (void *) (addr - low_address + copied),
2303 warning (_("Read from inferior faulted: %s"), safe_strerror (err));
2307 err = vm_deallocate (mach_task_self (), copied, copy_count);
2309 warning (_("gnu_read_inferior vm_deallocate failed: %s"),
2310 safe_strerror (err));
2315 #define CHK_GOTO_OUT(str,ret) \
2316 do if (ret != KERN_SUCCESS) { errstr = #str; goto out; } while(0)
2318 struct vm_region_list
2320 struct vm_region_list *next;
2321 vm_prot_t protection;
2326 struct obstack region_obstack;
2328 /* Write gdb's LEN bytes from MYADDR and copy it to ADDR in inferior
2329 task's address space. */
2331 gnu_write_inferior (task_t task, CORE_ADDR addr,
2332 const gdb_byte *myaddr, int length)
2335 vm_address_t low_address = (vm_address_t) trunc_page (addr);
2336 vm_size_t aligned_length =
2337 (vm_size_t) round_page (addr + length) - low_address;
2339 mach_msg_type_number_t copy_count;
2342 char *errstr = "Bug in gnu_write_inferior";
2344 struct vm_region_list *region_element;
2345 struct vm_region_list *region_head = (struct vm_region_list *) NULL;
2347 /* Get memory from inferior with page aligned addresses. */
2348 err = vm_read (task,
2353 CHK_GOTO_OUT ("gnu_write_inferior vm_read failed", err);
2357 err = hurd_safe_copyout ((void *) (addr - low_address + copied),
2359 CHK_GOTO_OUT ("Write to inferior faulted", err);
2361 obstack_init (®ion_obstack);
2363 /* Do writes atomically.
2364 First check for holes and unwritable memory. */
2366 vm_size_t remaining_length = aligned_length;
2367 vm_address_t region_address = low_address;
2369 struct vm_region_list *scan;
2371 while (region_address < low_address + aligned_length)
2373 vm_prot_t protection;
2374 vm_prot_t max_protection;
2375 vm_inherit_t inheritance;
2377 mach_port_t object_name;
2379 vm_size_t region_length = remaining_length;
2380 vm_address_t old_address = region_address;
2382 err = vm_region (task,
2391 CHK_GOTO_OUT ("vm_region failed", err);
2393 /* Check for holes in memory. */
2394 if (old_address != region_address)
2396 warning (_("No memory at 0x%lx. Nothing written"),
2403 if (!(max_protection & VM_PROT_WRITE))
2405 warning (_("Memory at address 0x%lx is unwritable. "
2413 /* Chain the regions for later use. */
2415 (struct vm_region_list *)
2416 obstack_alloc (®ion_obstack, sizeof (struct vm_region_list));
2418 region_element->protection = protection;
2419 region_element->start = region_address;
2420 region_element->length = region_length;
2422 /* Chain the regions along with protections. */
2423 region_element->next = region_head;
2424 region_head = region_element;
2426 region_address += region_length;
2427 remaining_length = remaining_length - region_length;
2430 /* If things fail after this, we give up.
2431 Somebody is messing up inferior_task's mappings. */
2433 /* Enable writes to the chained vm regions. */
2434 for (scan = region_head; scan; scan = scan->next)
2436 if (!(scan->protection & VM_PROT_WRITE))
2438 err = vm_protect (task,
2442 scan->protection | VM_PROT_WRITE);
2443 CHK_GOTO_OUT ("vm_protect: enable write failed", err);
2447 err = vm_write (task,
2451 CHK_GOTO_OUT ("vm_write failed", err);
2453 /* Set up the original region protections, if they were changed. */
2454 for (scan = region_head; scan; scan = scan->next)
2456 if (!(scan->protection & VM_PROT_WRITE))
2458 err = vm_protect (task,
2463 CHK_GOTO_OUT ("vm_protect: enable write failed", err);
2471 obstack_free (®ion_obstack, 0);
2473 (void) vm_deallocate (mach_task_self (),
2478 if (err != KERN_SUCCESS)
2480 warning (_("%s: %s"), errstr, mach_error_string (err));
2489 /* Implement the to_xfer_partial target_ops method for
2490 TARGET_OBJECT_MEMORY. */
2492 static enum target_xfer_status
2493 gnu_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf,
2494 CORE_ADDR memaddr, ULONGEST len, ULONGEST *xfered_len)
2496 task_t task = (gnu_current_inf
2497 ? (gnu_current_inf->task
2498 ? gnu_current_inf->task->port : 0)
2502 if (task == MACH_PORT_NULL)
2503 return TARGET_XFER_E_IO;
2505 if (writebuf != NULL)
2507 inf_debug (gnu_current_inf, "writing %s[%s] <-- %s",
2508 paddress (target_gdbarch (), memaddr), pulongest (len),
2509 host_address_to_string (writebuf));
2510 res = gnu_write_inferior (task, memaddr, writebuf, len);
2514 inf_debug (gnu_current_inf, "reading %s[%s] --> %s",
2515 paddress (target_gdbarch (), memaddr), pulongest (len),
2516 host_address_to_string (readbuf));
2517 res = gnu_read_inferior (task, memaddr, readbuf, len);
2519 gdb_assert (res >= 0);
2521 return TARGET_XFER_E_IO;
2524 *xfered_len = (ULONGEST) res;
2525 return TARGET_XFER_OK;
2529 /* Target to_xfer_partial implementation. */
2531 static enum target_xfer_status
2532 gnu_xfer_partial (struct target_ops *ops, enum target_object object,
2533 const char *annex, gdb_byte *readbuf,
2534 const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
2535 ULONGEST *xfered_len)
2539 case TARGET_OBJECT_MEMORY:
2540 return gnu_xfer_memory (readbuf, writebuf, offset, len, xfered_len);
2542 return TARGET_XFER_E_IO;
2546 /* Call FUNC on each memory region in the task. */
2548 gnu_find_memory_regions (struct target_ops *self,
2549 find_memory_region_ftype func, void *data)
2553 vm_address_t region_address, last_region_address, last_region_end;
2554 vm_prot_t last_protection;
2556 if (gnu_current_inf == 0 || gnu_current_inf->task == 0)
2558 task = gnu_current_inf->task->port;
2559 if (task == MACH_PORT_NULL)
2562 region_address = last_region_address = last_region_end = VM_MIN_ADDRESS;
2563 last_protection = VM_PROT_NONE;
2564 while (region_address < VM_MAX_ADDRESS)
2566 vm_prot_t protection;
2567 vm_prot_t max_protection;
2568 vm_inherit_t inheritance;
2570 mach_port_t object_name;
2572 vm_size_t region_length = VM_MAX_ADDRESS - region_address;
2573 vm_address_t old_address = region_address;
2575 err = vm_region (task,
2584 if (err == KERN_NO_SPACE)
2586 if (err != KERN_SUCCESS)
2588 warning (_("vm_region failed: %s"), mach_error_string (err));
2592 if (protection == last_protection && region_address == last_region_end)
2593 /* This region is contiguous with and indistinguishable from
2594 the previous one, so we just extend that one. */
2595 last_region_end = region_address += region_length;
2598 /* This region is distinct from the last one we saw, so report
2599 that previous one. */
2600 if (last_protection != VM_PROT_NONE)
2601 (*func) (last_region_address,
2602 last_region_end - last_region_address,
2603 last_protection & VM_PROT_READ,
2604 last_protection & VM_PROT_WRITE,
2605 last_protection & VM_PROT_EXECUTE,
2606 1, /* MODIFIED is unknown, pass it as true. */
2608 last_region_address = region_address;
2609 last_region_end = region_address += region_length;
2610 last_protection = protection;
2614 /* Report the final region. */
2615 if (last_region_end > last_region_address && last_protection != VM_PROT_NONE)
2616 (*func) (last_region_address, last_region_end - last_region_address,
2617 last_protection & VM_PROT_READ,
2618 last_protection & VM_PROT_WRITE,
2619 last_protection & VM_PROT_EXECUTE,
2620 1, /* MODIFIED is unknown, pass it as true. */
2627 /* Return printable description of proc. */
2629 proc_string (struct proc *proc)
2631 static char tid_str[80];
2633 if (proc_is_task (proc))
2634 xsnprintf (tid_str, sizeof (tid_str), "process %d", proc->inf->pid);
2636 xsnprintf (tid_str, sizeof (tid_str), "Thread %d.%d",
2637 proc->inf->pid, proc->tid);
2642 gnu_pid_to_str (struct target_ops *ops, ptid_t ptid)
2644 struct inf *inf = gnu_current_inf;
2645 int tid = ptid_get_lwp (ptid);
2646 struct proc *thread = inf_tid_to_thread (inf, tid);
2649 return proc_string (thread);
2652 static char tid_str[80];
2654 xsnprintf (tid_str, sizeof (tid_str), "bogus thread id %d", tid);
2660 /* Create a prototype generic GNU/Hurd target. The client can
2661 override it with local methods. */
2666 struct target_ops *t = inf_child_target ();
2668 t->to_attach = gnu_attach;
2669 t->to_attach_no_wait = 1;
2670 t->to_detach = gnu_detach;
2671 t->to_resume = gnu_resume;
2672 t->to_wait = gnu_wait;
2673 t->to_xfer_partial = gnu_xfer_partial;
2674 t->to_find_memory_regions = gnu_find_memory_regions;
2675 t->to_terminal_init = gnu_terminal_init;
2676 t->to_kill = gnu_kill_inferior;
2677 t->to_create_inferior = gnu_create_inferior;
2678 t->to_mourn_inferior = gnu_mourn_inferior;
2679 t->to_thread_alive = gnu_thread_alive;
2680 t->to_pid_to_str = gnu_pid_to_str;
2681 t->to_stop = gnu_stop;
2687 /* User task commands. */
2689 static struct cmd_list_element *set_task_cmd_list = 0;
2690 static struct cmd_list_element *show_task_cmd_list = 0;
2691 /* User thread commands. */
2693 /* Commands with a prefix of `set/show thread'. */
2694 extern struct cmd_list_element *thread_cmd_list;
2695 struct cmd_list_element *set_thread_cmd_list = NULL;
2696 struct cmd_list_element *show_thread_cmd_list = NULL;
2698 /* Commands with a prefix of `set/show thread default'. */
2699 struct cmd_list_element *set_thread_default_cmd_list = NULL;
2700 struct cmd_list_element *show_thread_default_cmd_list = NULL;
2703 set_thread_cmd (char *args, int from_tty)
2705 printf_unfiltered ("\"set thread\" must be followed by the "
2706 "name of a thread property, or \"default\".\n");
2710 show_thread_cmd (char *args, int from_tty)
2712 printf_unfiltered ("\"show thread\" must be followed by the "
2713 "name of a thread property, or \"default\".\n");
2717 set_thread_default_cmd (char *args, int from_tty)
2719 printf_unfiltered ("\"set thread default\" must be followed "
2720 "by the name of a thread property.\n");
2724 show_thread_default_cmd (char *args, int from_tty)
2726 printf_unfiltered ("\"show thread default\" must be followed "
2727 "by the name of a thread property.\n");
2731 parse_int_arg (char *args, char *cmd_prefix)
2736 int val = strtoul (args, &arg_end, 10);
2738 if (*args && *arg_end == '\0')
2741 error (_("Illegal argument for \"%s\" command, should be an integer."),
2746 _parse_bool_arg (char *args, char *t_val, char *f_val, char *cmd_prefix)
2748 if (!args || strcmp (args, t_val) == 0)
2750 else if (strcmp (args, f_val) == 0)
2753 error (_("Illegal argument for \"%s\" command, "
2754 "should be \"%s\" or \"%s\"."),
2755 cmd_prefix, t_val, f_val);
2758 #define parse_bool_arg(args, cmd_prefix) \
2759 _parse_bool_arg (args, "on", "off", cmd_prefix)
2762 check_empty (char *args, char *cmd_prefix)
2765 error (_("Garbage after \"%s\" command: `%s'"), cmd_prefix, args);
2768 /* Returns the alive thread named by INFERIOR_PID, or signals an error. */
2769 static struct proc *
2772 struct inf *inf = cur_inf ();
2773 struct proc *thread = inf_tid_to_thread (inf,
2774 ptid_get_lwp (inferior_ptid));
2776 error (_("No current thread."));
2780 /* Returns the current inferior, but signals an error if it has no task. */
2784 struct inf *inf = cur_inf ();
2787 error (_("No current process."));
2793 set_task_pause_cmd (char *args, int from_tty)
2795 struct inf *inf = cur_inf ();
2796 int old_sc = inf->pause_sc;
2798 inf->pause_sc = parse_bool_arg (args, "set task pause");
2800 if (old_sc == 0 && inf->pause_sc != 0)
2801 /* If the task is currently unsuspended, immediately suspend it,
2802 otherwise wait until the next time it gets control. */
2807 show_task_pause_cmd (char *args, int from_tty)
2809 struct inf *inf = cur_inf ();
2811 check_empty (args, "show task pause");
2812 printf_unfiltered ("The inferior task %s suspended while gdb has control.\n",
2814 ? (inf->pause_sc == 0 ? "isn't" : "is")
2815 : (inf->pause_sc == 0 ? "won't be" : "will be"));
2819 set_task_detach_sc_cmd (char *args, int from_tty)
2821 cur_inf ()->detach_sc = parse_int_arg (args,
2822 "set task detach-suspend-count");
2826 show_task_detach_sc_cmd (char *args, int from_tty)
2828 check_empty (args, "show task detach-suspend-count");
2829 printf_unfiltered ("The inferior task will be left with a "
2830 "suspend count of %d when detaching.\n",
2831 cur_inf ()->detach_sc);
2836 set_thread_default_pause_cmd (char *args, int from_tty)
2838 struct inf *inf = cur_inf ();
2840 inf->default_thread_pause_sc =
2841 parse_bool_arg (args, "set thread default pause") ? 0 : 1;
2845 show_thread_default_pause_cmd (char *args, int from_tty)
2847 struct inf *inf = cur_inf ();
2848 int sc = inf->default_thread_pause_sc;
2850 check_empty (args, "show thread default pause");
2851 printf_unfiltered ("New threads %s suspended while gdb has control%s.\n",
2852 sc ? "are" : "aren't",
2853 !sc && inf->pause_sc ? " (but the task is)" : "");
2857 set_thread_default_run_cmd (char *args, int from_tty)
2859 struct inf *inf = cur_inf ();
2861 inf->default_thread_run_sc =
2862 parse_bool_arg (args, "set thread default run") ? 0 : 1;
2866 show_thread_default_run_cmd (char *args, int from_tty)
2868 struct inf *inf = cur_inf ();
2870 check_empty (args, "show thread default run");
2871 printf_unfiltered ("New threads %s allowed to run.\n",
2872 inf->default_thread_run_sc == 0 ? "are" : "aren't");
2876 set_thread_default_detach_sc_cmd (char *args, int from_tty)
2878 cur_inf ()->default_thread_detach_sc =
2879 parse_int_arg (args, "set thread default detach-suspend-count");
2883 show_thread_default_detach_sc_cmd (char *args, int from_tty)
2885 check_empty (args, "show thread default detach-suspend-count");
2886 printf_unfiltered ("New threads will get a detach-suspend-count of %d.\n",
2887 cur_inf ()->default_thread_detach_sc);
2891 /* Steal a send right called NAME in the inferior task, and make it PROC's
2892 saved exception port. */
2894 steal_exc_port (struct proc *proc, mach_port_t name)
2898 mach_msg_type_name_t port_type;
2900 if (!proc || !proc->inf->task)
2901 error (_("No inferior task."));
2903 err = mach_port_extract_right (proc->inf->task->port,
2904 name, MACH_MSG_TYPE_COPY_SEND,
2907 error (_("Couldn't extract send right %lu from inferior: %s"),
2908 name, safe_strerror (err));
2910 if (proc->saved_exc_port)
2911 /* Get rid of our reference to the old one. */
2912 mach_port_deallocate (mach_task_self (), proc->saved_exc_port);
2914 proc->saved_exc_port = port;
2916 if (!proc->exc_port)
2917 /* If PROC is a thread, we may not have set its exception port
2918 before. We can't use proc_steal_exc_port because it also sets
2921 proc->exc_port = proc->inf->event_port;
2922 err = proc_set_exception_port (proc, proc->exc_port);
2923 error (_("Can't set exception port for %s: %s"),
2924 proc_string (proc), safe_strerror (err));
2929 set_task_exc_port_cmd (char *args, int from_tty)
2931 struct inf *inf = cur_inf ();
2934 error (_("No argument to \"set task exception-port\" command."));
2935 steal_exc_port (inf->task, parse_and_eval_address (args));
2939 set_stopped_cmd (char *args, int from_tty)
2941 cur_inf ()->stopped = _parse_bool_arg (args, "yes", "no", "set stopped");
2945 show_stopped_cmd (char *args, int from_tty)
2947 struct inf *inf = active_inf ();
2949 check_empty (args, "show stopped");
2950 printf_unfiltered ("The inferior process %s stopped.\n",
2951 inf->stopped ? "is" : "isn't");
2955 set_sig_thread_cmd (char *args, int from_tty)
2957 struct inf *inf = cur_inf ();
2959 if (!args || (!isdigit (*args) && strcmp (args, "none") != 0))
2960 error (_("Illegal argument to \"set signal-thread\" command.\n"
2961 "Should be an integer thread ID, or `none'."));
2963 if (strcmp (args, "none") == 0)
2964 inf->signal_thread = 0;
2967 ptid_t ptid = thread_id_to_pid (atoi (args));
2969 if (ptid_equal (ptid, minus_one_ptid))
2970 error (_("Thread ID %s not known. "
2971 "Use the \"info threads\" command to\n"
2972 "see the IDs of currently known threads."), args);
2973 inf->signal_thread = inf_tid_to_thread (inf, ptid_get_lwp (ptid));
2978 show_sig_thread_cmd (char *args, int from_tty)
2980 struct inf *inf = active_inf ();
2982 check_empty (args, "show signal-thread");
2983 if (inf->signal_thread)
2984 printf_unfiltered ("The signal thread is %s.\n",
2985 proc_string (inf->signal_thread));
2987 printf_unfiltered ("There is no signal thread.\n");
2992 set_signals_cmd (char *args, int from_tty)
2994 struct inf *inf = cur_inf ();
2996 inf->want_signals = parse_bool_arg (args, "set signals");
2998 if (inf->task && inf->want_signals != inf->traced)
2999 /* Make this take effect immediately in a running process. */
3000 inf_set_traced (inf, inf->want_signals);
3004 show_signals_cmd (char *args, int from_tty)
3006 struct inf *inf = cur_inf ();
3008 check_empty (args, "show signals");
3009 printf_unfiltered ("The inferior process's signals %s intercepted.\n",
3011 ? (inf->traced ? "are" : "aren't")
3012 : (inf->want_signals ? "will be" : "won't be"));
3016 set_exceptions_cmd (char *args, int from_tty)
3018 struct inf *inf = cur_inf ();
3019 int val = parse_bool_arg (args, "set exceptions");
3021 /* Make this take effect immediately in a running process. */
3024 inf->want_exceptions = val;
3028 show_exceptions_cmd (char *args, int from_tty)
3030 struct inf *inf = cur_inf ();
3032 check_empty (args, "show exceptions");
3033 printf_unfiltered ("Exceptions in the inferior %s trapped.\n",
3035 ? (inf->want_exceptions ? "are" : "aren't")
3036 : (inf->want_exceptions ? "will be" : "won't be"));
3041 set_task_cmd (char *args, int from_tty)
3043 printf_unfiltered ("\"set task\" must be followed by the name"
3044 " of a task property.\n");
3048 show_task_cmd (char *args, int from_tty)
3050 struct inf *inf = cur_inf ();
3052 check_empty (args, "show task");
3054 show_signals_cmd (0, from_tty);
3055 show_exceptions_cmd (0, from_tty);
3056 show_task_pause_cmd (0, from_tty);
3058 if (inf->pause_sc == 0)
3059 show_thread_default_pause_cmd (0, from_tty);
3060 show_thread_default_run_cmd (0, from_tty);
3064 show_stopped_cmd (0, from_tty);
3065 show_sig_thread_cmd (0, from_tty);
3068 if (inf->detach_sc != 0)
3069 show_task_detach_sc_cmd (0, from_tty);
3070 if (inf->default_thread_detach_sc != 0)
3071 show_thread_default_detach_sc_cmd (0, from_tty);
3076 set_noninvasive_cmd (char *args, int from_tty)
3078 /* Invert the sense of the arg for each component. */
3079 char *inv_args = parse_bool_arg (args, "set noninvasive") ? "off" : "on";
3081 set_task_pause_cmd (inv_args, from_tty);
3082 set_signals_cmd (inv_args, from_tty);
3083 set_exceptions_cmd (inv_args, from_tty);
3088 info_port_rights (const char *args, mach_port_type_t only)
3090 struct inf *inf = active_inf ();
3091 struct value *vmark = value_mark ();
3094 /* Explicit list of port rights. */
3098 struct value *val = parse_to_comma_and_eval (&args);
3099 long right = value_as_long (val);
3101 print_port_info (right, 0, inf->task->port, PORTINFO_DETAILS,
3105 error (_("%ld: %s."), right, safe_strerror (err));
3109 /* Print all of them. */
3112 print_task_ports_info (inf->task->port, only, PORTINFO_DETAILS,
3115 error (_("%s."), safe_strerror (err));
3118 value_free_to_mark (vmark);
3122 info_send_rights_cmd (char *args, int from_tty)
3124 info_port_rights (args, MACH_PORT_TYPE_SEND);
3128 info_recv_rights_cmd (char *args, int from_tty)
3130 info_port_rights (args, MACH_PORT_TYPE_RECEIVE);
3134 info_port_sets_cmd (char *args, int from_tty)
3136 info_port_rights (args, MACH_PORT_TYPE_PORT_SET);
3140 info_dead_names_cmd (char *args, int from_tty)
3142 info_port_rights (args, MACH_PORT_TYPE_DEAD_NAME);
3146 info_port_rights_cmd (char *args, int from_tty)
3148 info_port_rights (args, ~0);
3153 add_task_commands (void)
3155 add_cmd ("pause", class_run, set_thread_default_pause_cmd, _("\
3156 Set whether the new threads are suspended while gdb has control.\n\
3157 This property normally has no effect because the whole task is\n\
3158 suspended, however, that may be disabled with \"set task pause off\".\n\
3159 The default value is \"off\"."),
3160 &set_thread_default_cmd_list);
3161 add_cmd ("pause", no_class, show_thread_default_pause_cmd, _("\
3162 Show whether new threads are suspended while gdb has control."),
3163 &show_thread_default_cmd_list);
3165 add_cmd ("run", class_run, set_thread_default_run_cmd, _("\
3166 Set whether new threads are allowed to run (once gdb has noticed them)."),
3167 &set_thread_default_cmd_list);
3168 add_cmd ("run", no_class, show_thread_default_run_cmd, _("\
3169 Show whether new threads are allowed to run (once gdb has noticed them)."),
3170 &show_thread_default_cmd_list);
3172 add_cmd ("detach-suspend-count", class_run, set_thread_default_detach_sc_cmd,
3173 _("Set the default detach-suspend-count value for new threads."),
3174 &set_thread_default_cmd_list);
3175 add_cmd ("detach-suspend-count", no_class, show_thread_default_detach_sc_cmd,
3176 _("Show the default detach-suspend-count value for new threads."),
3177 &show_thread_default_cmd_list);
3179 add_cmd ("signals", class_run, set_signals_cmd, _("\
3180 Set whether the inferior process's signals will be intercepted.\n\
3181 Mach exceptions (such as breakpoint traps) are not affected."),
3183 add_alias_cmd ("sigs", "signals", class_run, 1, &setlist);
3184 add_cmd ("signals", no_class, show_signals_cmd, _("\
3185 Show whether the inferior process's signals will be intercepted."),
3187 add_alias_cmd ("sigs", "signals", no_class, 1, &showlist);
3189 add_cmd ("signal-thread", class_run, set_sig_thread_cmd, _("\
3190 Set the thread that gdb thinks is the libc signal thread.\n\
3191 This thread is run when delivering a signal to a non-stopped process."),
3193 add_alias_cmd ("sigthread", "signal-thread", class_run, 1, &setlist);
3194 add_cmd ("signal-thread", no_class, show_sig_thread_cmd, _("\
3195 Set the thread that gdb thinks is the libc signal thread."),
3197 add_alias_cmd ("sigthread", "signal-thread", no_class, 1, &showlist);
3199 add_cmd ("stopped", class_run, set_stopped_cmd, _("\
3200 Set whether gdb thinks the inferior process is stopped as with SIGSTOP.\n\
3201 Stopped process will be continued by sending them a signal."),
3203 add_cmd ("stopped", no_class, show_stopped_cmd, _("\
3204 Show whether gdb thinks the inferior process is stopped as with SIGSTOP."),
3207 add_cmd ("exceptions", class_run, set_exceptions_cmd, _("\
3208 Set whether exceptions in the inferior process will be trapped.\n\
3209 When exceptions are turned off, neither breakpoints nor single-stepping\n\
3212 /* Allow `set exc' despite conflict with `set exception-port'. */
3213 add_alias_cmd ("exc", "exceptions", class_run, 1, &setlist);
3214 add_cmd ("exceptions", no_class, show_exceptions_cmd, _("\
3215 Show whether exceptions in the inferior process will be trapped."),
3218 add_prefix_cmd ("task", no_class, set_task_cmd,
3219 _("Command prefix for setting task attributes."),
3220 &set_task_cmd_list, "set task ", 0, &setlist);
3221 add_prefix_cmd ("task", no_class, show_task_cmd,
3222 _("Command prefix for showing task attributes."),
3223 &show_task_cmd_list, "show task ", 0, &showlist);
3225 add_cmd ("pause", class_run, set_task_pause_cmd, _("\
3226 Set whether the task is suspended while gdb has control.\n\
3227 A value of \"on\" takes effect immediately, otherwise nothing happens\n\
3228 until the next time the program is continued.\n\
3229 When setting this to \"off\", \"set thread default pause on\" can be\n\
3230 used to pause individual threads by default instead."),
3231 &set_task_cmd_list);
3232 add_cmd ("pause", no_class, show_task_pause_cmd,
3233 _("Show whether the task is suspended while gdb has control."),
3234 &show_task_cmd_list);
3236 add_cmd ("detach-suspend-count", class_run, set_task_detach_sc_cmd,
3237 _("Set the suspend count will leave on the thread when detaching."),
3238 &set_task_cmd_list);
3239 add_cmd ("detach-suspend-count", no_class, show_task_detach_sc_cmd,
3240 _("Show the suspend count will leave "
3241 "on the thread when detaching."),
3242 &show_task_cmd_list);
3244 add_cmd ("exception-port", no_class, set_task_exc_port_cmd, _("\
3245 Set the task exception port to which we forward exceptions.\n\
3246 The argument should be the value of the send right in the task."),
3247 &set_task_cmd_list);
3248 add_alias_cmd ("excp", "exception-port", no_class, 1, &set_task_cmd_list);
3249 add_alias_cmd ("exc-port", "exception-port", no_class, 1,
3250 &set_task_cmd_list);
3252 /* A convenient way of turning on all options require to noninvasively
3253 debug running tasks. */
3254 add_cmd ("noninvasive", no_class, set_noninvasive_cmd, _("\
3255 Set task options so that we interfere as little as possible.\n\
3256 This is the same as setting `task pause', `exceptions', and\n\
3257 `signals' to the opposite value."),
3260 /* Commands to show information about the task's ports. */
3261 add_cmd ("send-rights", class_info, info_send_rights_cmd,
3262 _("Show information about the task's send rights"),
3264 add_cmd ("receive-rights", class_info, info_recv_rights_cmd,
3265 _("Show information about the task's receive rights"),
3267 add_cmd ("port-rights", class_info, info_port_rights_cmd,
3268 _("Show information about the task's port rights"),
3270 add_cmd ("port-sets", class_info, info_port_sets_cmd,
3271 _("Show information about the task's port sets"),
3273 add_cmd ("dead-names", class_info, info_dead_names_cmd,
3274 _("Show information about the task's dead names"),
3276 add_info_alias ("ports", "port-rights", 1);
3277 add_info_alias ("port", "port-rights", 1);
3278 add_info_alias ("psets", "port-sets", 1);
3283 set_thread_pause_cmd (char *args, int from_tty)
3285 struct proc *thread = cur_thread ();
3286 int old_sc = thread->pause_sc;
3288 thread->pause_sc = parse_bool_arg (args, "set thread pause");
3289 if (old_sc == 0 && thread->pause_sc != 0 && thread->inf->pause_sc == 0)
3290 /* If the task is currently unsuspended, immediately suspend it,
3291 otherwise wait until the next time it gets control. */
3292 inf_suspend (thread->inf);
3296 show_thread_pause_cmd (char *args, int from_tty)
3298 struct proc *thread = cur_thread ();
3299 int sc = thread->pause_sc;
3301 check_empty (args, "show task pause");
3302 printf_unfiltered ("Thread %s %s suspended while gdb has control%s.\n",
3303 proc_string (thread),
3304 sc ? "is" : "isn't",
3305 !sc && thread->inf->pause_sc ? " (but the task is)" : "");
3309 set_thread_run_cmd (char *args, int from_tty)
3311 struct proc *thread = cur_thread ();
3313 thread->run_sc = parse_bool_arg (args, "set thread run") ? 0 : 1;
3317 show_thread_run_cmd (char *args, int from_tty)
3319 struct proc *thread = cur_thread ();
3321 check_empty (args, "show thread run");
3322 printf_unfiltered ("Thread %s %s allowed to run.",
3323 proc_string (thread),
3324 thread->run_sc == 0 ? "is" : "isn't");
3328 set_thread_detach_sc_cmd (char *args, int from_tty)
3330 cur_thread ()->detach_sc = parse_int_arg (args,
3331 "set thread detach-suspend-count");
3335 show_thread_detach_sc_cmd (char *args, int from_tty)
3337 struct proc *thread = cur_thread ();
3339 check_empty (args, "show thread detach-suspend-count");
3340 printf_unfiltered ("Thread %s will be left with a suspend count"
3341 " of %d when detaching.\n",
3342 proc_string (thread),
3347 set_thread_exc_port_cmd (char *args, int from_tty)
3349 struct proc *thread = cur_thread ();
3352 error (_("No argument to \"set thread exception-port\" command."));
3353 steal_exc_port (thread, parse_and_eval_address (args));
3358 show_thread_cmd (char *args, int from_tty)
3360 struct proc *thread = cur_thread ();
3362 check_empty (args, "show thread");
3363 show_thread_run_cmd (0, from_tty);
3364 show_thread_pause_cmd (0, from_tty);
3365 if (thread->detach_sc != 0)
3366 show_thread_detach_sc_cmd (0, from_tty);
3371 thread_takeover_sc_cmd (char *args, int from_tty)
3373 struct proc *thread = cur_thread ();
3375 thread_basic_info_data_t _info;
3376 thread_basic_info_t info = &_info;
3377 mach_msg_type_number_t info_len = THREAD_BASIC_INFO_COUNT;
3379 thread_info (thread->port, THREAD_BASIC_INFO, (int *) &info, &info_len);
3381 error (("%s."), safe_strerror (err));
3382 thread->sc = info->suspend_count;
3384 printf_unfiltered ("Suspend count was %d.\n", thread->sc);
3386 vm_deallocate (mach_task_self (), (vm_address_t) info,
3387 info_len * sizeof (int));
3392 add_thread_commands (void)
3394 add_prefix_cmd ("thread", no_class, set_thread_cmd,
3395 _("Command prefix for setting thread properties."),
3396 &set_thread_cmd_list, "set thread ", 0, &setlist);
3397 add_prefix_cmd ("default", no_class, show_thread_cmd,
3398 _("Command prefix for setting default thread properties."),
3399 &set_thread_default_cmd_list, "set thread default ", 0,
3400 &set_thread_cmd_list);
3401 add_prefix_cmd ("thread", no_class, set_thread_default_cmd,
3402 _("Command prefix for showing thread properties."),
3403 &show_thread_cmd_list, "show thread ", 0, &showlist);
3404 add_prefix_cmd ("default", no_class, show_thread_default_cmd,
3405 _("Command prefix for showing default thread properties."),
3406 &show_thread_default_cmd_list, "show thread default ", 0,
3407 &show_thread_cmd_list);
3409 add_cmd ("pause", class_run, set_thread_pause_cmd, _("\
3410 Set whether the current thread is suspended while gdb has control.\n\
3411 A value of \"on\" takes effect immediately, otherwise nothing happens\n\
3412 until the next time the program is continued. This property normally\n\
3413 has no effect because the whole task is suspended, however, that may\n\
3414 be disabled with \"set task pause off\".\n\
3415 The default value is \"off\"."),
3416 &set_thread_cmd_list);
3417 add_cmd ("pause", no_class, show_thread_pause_cmd, _("\
3418 Show whether the current thread is suspended while gdb has control."),
3419 &show_thread_cmd_list);
3421 add_cmd ("run", class_run, set_thread_run_cmd,
3422 _("Set whether the current thread is allowed to run."),
3423 &set_thread_cmd_list);
3424 add_cmd ("run", no_class, show_thread_run_cmd,
3425 _("Show whether the current thread is allowed to run."),
3426 &show_thread_cmd_list);
3428 add_cmd ("detach-suspend-count", class_run, set_thread_detach_sc_cmd, _("\
3429 Set 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 &set_thread_cmd_list);
3433 add_cmd ("detach-suspend-count", no_class, show_thread_detach_sc_cmd, _("\
3434 Show the suspend count will leave on the thread when detaching.\n\
3435 Note that this is relative to suspend count when gdb noticed the thread;\n\
3436 use the `thread takeover-suspend-count' to force it to an absolute value."),
3437 &show_thread_cmd_list);
3439 add_cmd ("exception-port", no_class, set_thread_exc_port_cmd, _("\
3440 Set the thread exception port to which we forward exceptions.\n\
3441 This overrides the task exception port.\n\
3442 The argument should be the value of the send right in the task."),
3443 &set_thread_cmd_list);
3444 add_alias_cmd ("excp", "exception-port", no_class, 1, &set_thread_cmd_list);
3445 add_alias_cmd ("exc-port", "exception-port", no_class, 1,
3446 &set_thread_cmd_list);
3448 add_cmd ("takeover-suspend-count", no_class, thread_takeover_sc_cmd, _("\
3449 Force the threads absolute suspend-count to be gdb's.\n\
3450 Prior to giving this command, gdb's thread suspend-counts are relative\n\
3451 to the thread's initial suspend-count when gdb notices the threads."),
3457 /* -Wmissing-prototypes */
3458 extern initialize_file_ftype _initialize_gnu_nat;
3461 _initialize_gnu_nat (void)
3463 proc_server = getproc ();
3465 add_task_commands ();
3466 add_thread_commands ();
3467 add_setshow_boolean_cmd ("gnu-nat", class_maintenance,
3469 _("Set debugging output for the gnu backend."),
3470 _("Show debugging output for the gnu backend."),
3478 #ifdef FLUSH_INFERIOR_CACHE
3480 /* When over-writing code on some machines the I-Cache must be flushed
3481 explicitly, because it is not kept coherent by the lazy hardware.
3482 This definitely includes breakpoints, for instance, or else we
3483 end up looping in mysterious Bpt traps. */
3486 flush_inferior_icache (CORE_ADDR pc, int amount)
3488 vm_machine_attribute_val_t flush = MATTR_VAL_ICACHE_FLUSH;
3491 ret = vm_machine_attribute (gnu_current_inf->task->port,
3496 if (ret != KERN_SUCCESS)
3497 warning (_("Error flushing inferior's cache : %s"), safe_strerror (ret));
3499 #endif /* FLUSH_INFERIOR_CACHE */