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. This is a count of how many execs we
215 unsigned pending_execs;
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: %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
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: %d", 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: %d", 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 %d: %s"),
581 port, safe_strerror (err));
584 proc_debug (proc, "notifications to: %d", 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: %d", 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: %d", 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 = %d, thread = %d, 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 = %d, ignoring minor event",
1572 inf->pending_execs);
1574 else if (kind == TARGET_WAITKIND_STOPPED
1575 && w->status.value.sig == GDB_SIGNAL_TRAP)
1576 /* Ah hah! A SIGTRAP from the inferior while starting up probably
1577 means we've succesfully completed an exec! */
1579 if (--inf->pending_execs == 0)
1582 #if 0 /* do we need this? */
1583 prune_threads (1); /* Get rid of the old shell
1585 renumber_threads (0); /* Give our threads reasonable
1589 inf_debug (inf, "pending exec completed, pending_execs => %d",
1590 inf->pending_execs);
1592 else if (kind == TARGET_WAITKIND_STOPPED)
1593 /* It's possible that this signal is because of a crashed process
1594 being handled by the hurd crash server; in this case, the process
1595 will have an extra task suspend, which we need to know about.
1596 Since the code in inf_resume that normally checks for this is
1597 disabled while INF->pending_execs, we do the check here instead. */
1598 inf_validate_task_sc (inf);
1601 if (inf->wait.suppress)
1602 /* Some totally spurious event happened that we don't consider
1603 worth returning to gdb. Just keep waiting. */
1605 inf_debug (inf, "suppressing return, rewaiting...");
1610 /* Pass back out our results. */
1611 memcpy (status, &inf->wait.status, sizeof (*status));
1613 thread = inf->wait.thread;
1615 ptid = ptid_build (inf->pid, thread->tid, 0);
1616 else if (ptid_equal (ptid, minus_one_ptid))
1617 thread = inf_tid_to_thread (inf, -1);
1619 thread = inf_tid_to_thread (inf, ptid_get_lwp (ptid));
1621 if (!thread || thread->port == MACH_PORT_NULL)
1623 /* TID is dead; try and find a new thread. */
1624 if (inf_update_procs (inf) && inf->threads)
1625 ptid = ptid_build (inf->pid, inf->threads->tid, 0); /* The first
1629 ptid = inferior_ptid; /* let wait_for_inferior handle exit case */
1633 && !ptid_equal (ptid, minus_one_ptid)
1634 && status->kind != TARGET_WAITKIND_SPURIOUS
1635 && inf->pause_sc == 0 && thread->pause_sc == 0)
1636 /* If something actually happened to THREAD, make sure we
1640 inf_update_suspends (inf);
1643 inf_debug (inf, "returning ptid = %s, status = %s (%d)",
1644 target_pid_to_str (ptid),
1645 status->kind == TARGET_WAITKIND_EXITED ? "EXITED"
1646 : status->kind == TARGET_WAITKIND_STOPPED ? "STOPPED"
1647 : status->kind == TARGET_WAITKIND_SIGNALLED ? "SIGNALLED"
1648 : status->kind == TARGET_WAITKIND_LOADED ? "LOADED"
1649 : status->kind == TARGET_WAITKIND_SPURIOUS ? "SPURIOUS"
1651 status->value.integer);
1657 /* The rpc handler called by exc_server. */
1659 S_exception_raise_request (mach_port_t port, mach_port_t reply_port,
1660 thread_t thread_port, task_t task_port,
1661 int exception, int code, int subcode)
1663 struct inf *inf = waiting_inf;
1664 struct proc *thread = inf_port_to_thread (inf, thread_port);
1666 inf_debug (waiting_inf,
1667 "thread = %d, task = %d, exc = %d, code = %d, subcode = %d",
1668 thread_port, task_port, exception, code, subcode);
1671 /* We don't know about thread? */
1673 inf_update_procs (inf);
1674 thread = inf_port_to_thread (inf, thread_port);
1676 /* Give up, the generating thread is gone. */
1680 mach_port_deallocate (mach_task_self (), thread_port);
1681 mach_port_deallocate (mach_task_self (), task_port);
1683 if (!thread->aborted)
1684 /* THREAD hasn't been aborted since this exception happened (abortion
1685 clears any exception state), so it must be real. */
1687 /* Store away the details; this will destroy any previous info. */
1688 inf->wait.thread = thread;
1690 inf->wait.status.kind = TARGET_WAITKIND_STOPPED;
1692 if (exception == EXC_BREAKPOINT)
1693 /* GDB likes to get SIGTRAP for breakpoints. */
1695 inf->wait.status.value.sig = GDB_SIGNAL_TRAP;
1696 mach_port_deallocate (mach_task_self (), reply_port);
1699 /* Record the exception so that we can forward it later. */
1701 if (thread->exc_port == port)
1703 inf_debug (waiting_inf, "Handler is thread exception port <%d>",
1704 thread->saved_exc_port);
1705 inf->wait.exc.handler = thread->saved_exc_port;
1709 inf_debug (waiting_inf, "Handler is task exception port <%d>",
1710 inf->task->saved_exc_port);
1711 inf->wait.exc.handler = inf->task->saved_exc_port;
1712 gdb_assert (inf->task->exc_port == port);
1714 if (inf->wait.exc.handler != MACH_PORT_NULL)
1715 /* Add a reference to the exception handler. */
1716 mach_port_mod_refs (mach_task_self (),
1717 inf->wait.exc.handler, MACH_PORT_RIGHT_SEND,
1720 inf->wait.exc.exception = exception;
1721 inf->wait.exc.code = code;
1722 inf->wait.exc.subcode = subcode;
1723 inf->wait.exc.reply = reply_port;
1725 /* Exceptions are encoded in the signal space by putting
1726 them after _NSIG; this assumes they're positive (and not
1727 extremely large)! */
1728 inf->wait.status.value.sig =
1729 gdb_signal_from_host (_NSIG + exception);
1733 /* A supppressed exception, which ignore. */
1735 inf->wait.suppress = 1;
1736 mach_port_deallocate (mach_task_self (), reply_port);
1743 /* Fill in INF's wait field after a task has died without giving us more
1744 detailed information. */
1746 inf_task_died_status (struct inf *inf)
1748 warning (_("Pid %d died with unknown exit status, using SIGKILL."),
1750 inf->wait.status.kind = TARGET_WAITKIND_SIGNALLED;
1751 inf->wait.status.value.sig = GDB_SIGNAL_KILL;
1754 /* Notify server routines. The only real one is dead name notification. */
1756 do_mach_notify_dead_name (mach_port_t notify, mach_port_t dead_port)
1758 struct inf *inf = waiting_inf;
1760 inf_debug (waiting_inf, "port = %d", dead_port);
1762 if (inf->task && inf->task->port == dead_port)
1764 proc_debug (inf->task, "is dead");
1765 inf->task->port = MACH_PORT_NULL;
1766 if (proc_wait_pid == inf->pid)
1767 /* We have a wait outstanding on the process, which will return more
1768 detailed information, so delay until we get that. */
1769 inf->wait.suppress = 1;
1771 /* We never waited for the process (maybe it wasn't a child), so just
1772 pretend it got a SIGKILL. */
1773 inf_task_died_status (inf);
1777 struct proc *thread = inf_port_to_thread (inf, dead_port);
1781 proc_debug (thread, "is dead");
1782 thread->port = MACH_PORT_NULL;
1785 if (inf->task->dead)
1786 /* Since the task is dead, its threads are dying with it. */
1787 inf->wait.suppress = 1;
1790 mach_port_deallocate (mach_task_self (), dead_port);
1791 inf->threads_up_to_date = 0; /* Just in case. */
1797 #define ILL_RPC(fun, ...) \
1798 kern_return_t fun (__VA_ARGS__) \
1800 warning (_("illegal rpc: %s"), #fun); \
1804 ILL_RPC (do_mach_notify_no_senders,
1805 mach_port_t notify, mach_port_mscount_t count)
1806 ILL_RPC (do_mach_notify_port_deleted,
1807 mach_port_t notify, mach_port_t name)
1808 ILL_RPC (do_mach_notify_msg_accepted,
1809 mach_port_t notify, mach_port_t name)
1810 ILL_RPC (do_mach_notify_port_destroyed,
1811 mach_port_t notify, mach_port_t name)
1812 ILL_RPC (do_mach_notify_send_once,
1815 /* Process_reply server routines. We only use process_wait_reply. */
1818 S_proc_wait_reply (mach_port_t reply, error_t err,
1819 int status, int sigcode, rusage_t rusage, pid_t pid)
1821 struct inf *inf = waiting_inf;
1823 inf_debug (inf, "err = %s, pid = %d, status = 0x%x, sigcode = %d",
1824 err ? safe_strerror (err) : "0", pid, status, sigcode);
1826 if (err && proc_wait_pid && (!inf->task || !inf->task->port))
1827 /* Ack. The task has died, but the task-died notification code didn't
1828 tell anyone because it thought a more detailed reply from the
1829 procserver was forthcoming. However, we now learn that won't
1830 happen... So we have to act like the task just died, and this time,
1832 inf_task_died_status (inf);
1834 if (--proc_waits_pending == 0)
1835 /* PROC_WAIT_PID represents the most recent wait. We will always get
1836 replies in order because the proc server is single threaded. */
1839 inf_debug (inf, "waits pending now: %d", proc_waits_pending);
1845 warning (_("Can't wait for pid %d: %s"),
1846 inf->pid, safe_strerror (err));
1849 /* Since we can't see the inferior's signals, don't trap them. */
1850 inf_set_traced (inf, 0);
1853 else if (pid == inf->pid)
1855 store_waitstatus (&inf->wait.status, status);
1856 if (inf->wait.status.kind == TARGET_WAITKIND_STOPPED)
1857 /* The process has sent us a signal, and stopped itself in a sane
1858 state pending our actions. */
1860 inf_debug (inf, "process has stopped itself");
1865 inf->wait.suppress = 1; /* Something odd happened. Ignore. */
1870 ILL_RPC (S_proc_setmsgport_reply,
1871 mach_port_t reply_port, kern_return_t return_code,
1872 mach_port_t oldmsgport)
1873 ILL_RPC (S_proc_getmsgport_reply,
1874 mach_port_t reply_port, kern_return_t return_code,
1875 mach_port_t msgports)
1876 ILL_RPC (S_proc_pid2task_reply,
1877 mach_port_t reply_port, kern_return_t return_code, mach_port_t task)
1878 ILL_RPC (S_proc_task2pid_reply,
1879 mach_port_t reply_port, kern_return_t return_code, pid_t pid)
1880 ILL_RPC (S_proc_task2proc_reply,
1881 mach_port_t reply_port, kern_return_t return_code, mach_port_t proc)
1882 ILL_RPC (S_proc_proc2task_reply,
1883 mach_port_t reply_port, kern_return_t return_code, mach_port_t task)
1884 ILL_RPC (S_proc_pid2proc_reply,
1885 mach_port_t reply_port, kern_return_t return_code, mach_port_t proc)
1886 ILL_RPC (S_proc_getprocinfo_reply,
1887 mach_port_t reply_port, kern_return_t return_code,
1888 int flags, procinfo_t procinfo, mach_msg_type_number_t procinfoCnt,
1889 data_t threadwaits, mach_msg_type_number_t threadwaitsCnt)
1890 ILL_RPC (S_proc_getprocargs_reply,
1891 mach_port_t reply_port, kern_return_t return_code,
1892 data_t procargs, mach_msg_type_number_t procargsCnt)
1893 ILL_RPC (S_proc_getprocenv_reply,
1894 mach_port_t reply_port, kern_return_t return_code,
1895 data_t procenv, mach_msg_type_number_t procenvCnt)
1896 ILL_RPC (S_proc_getloginid_reply,
1897 mach_port_t reply_port, kern_return_t return_code, pid_t login_id)
1898 ILL_RPC (S_proc_getloginpids_reply,
1899 mach_port_t reply_port, kern_return_t return_code,
1900 pidarray_t pids, mach_msg_type_number_t pidsCnt)
1901 ILL_RPC (S_proc_getlogin_reply,
1902 mach_port_t reply_port, kern_return_t return_code, string_t logname)
1903 ILL_RPC (S_proc_getsid_reply,
1904 mach_port_t reply_port, kern_return_t return_code, pid_t sid)
1905 ILL_RPC (S_proc_getsessionpgids_reply,
1906 mach_port_t reply_port, kern_return_t return_code,
1907 pidarray_t pgidset, mach_msg_type_number_t pgidsetCnt)
1908 ILL_RPC (S_proc_getsessionpids_reply,
1909 mach_port_t reply_port, kern_return_t return_code,
1910 pidarray_t pidset, mach_msg_type_number_t pidsetCnt)
1911 ILL_RPC (S_proc_getsidport_reply,
1912 mach_port_t reply_port, kern_return_t return_code,
1913 mach_port_t sessport)
1914 ILL_RPC (S_proc_getpgrp_reply,
1915 mach_port_t reply_port, kern_return_t return_code, pid_t pgrp)
1916 ILL_RPC (S_proc_getpgrppids_reply,
1917 mach_port_t reply_port, kern_return_t return_code,
1918 pidarray_t pidset, mach_msg_type_number_t pidsetCnt)
1919 ILL_RPC (S_proc_get_tty_reply,
1920 mach_port_t reply_port, kern_return_t return_code, mach_port_t tty)
1921 ILL_RPC (S_proc_getnports_reply,
1922 mach_port_t reply_port, kern_return_t return_code,
1923 mach_msg_type_number_t nports)
1924 ILL_RPC (S_proc_is_important_reply,
1925 mach_port_t reply_port, kern_return_t return_code,
1926 boolean_t essential)
1927 ILL_RPC (S_proc_get_code_reply,
1928 mach_port_t reply_port, kern_return_t return_code,
1929 vm_address_t start_code, vm_address_t end_code)
1931 /* Msg_reply server routines. We only use msg_sig_post_untraced_reply. */
1934 S_msg_sig_post_untraced_reply (mach_port_t reply, error_t err)
1936 struct inf *inf = waiting_inf;
1939 /* EBUSY is what we get when the crash server has grabbed control of the
1940 process and doesn't like what signal we tried to send it. Just act
1941 like the process stopped (using a signal of 0 should mean that the
1942 *next* time the user continues, it will pass signal 0, which the crash
1943 server should like). */
1945 inf->wait.status.kind = TARGET_WAITKIND_STOPPED;
1946 inf->wait.status.value.sig = GDB_SIGNAL_0;
1949 warning (_("Signal delivery failed: %s"), safe_strerror (err));
1952 /* We only get this reply when we've posted a signal to a process which we
1953 thought was stopped, and which we expected to continue after the signal.
1954 Given that the signal has failed for some reason, it's reasonable to
1955 assume it's still stopped. */
1958 inf->wait.suppress = 1;
1963 ILL_RPC (S_msg_sig_post_reply,
1964 mach_port_t reply, error_t err)
1966 /* Returns the number of messages queued for the receive right PORT. */
1967 static mach_port_msgcount_t
1968 port_msgs_queued (mach_port_t port)
1970 struct mach_port_status status;
1972 mach_port_get_receive_status (mach_task_self (), port, &status);
1977 return status.mps_msgcount;
1981 /* Resume execution of the inferior process.
1983 If STEP is nonzero, single-step it.
1984 If SIGNAL is nonzero, give it that signal.
1987 -1 true Single step the current thread allowing other threads to run.
1988 -1 false Continue the current thread allowing other threads to run.
1989 X true Single step the given thread, don't allow any others to run.
1990 X false Continue the given thread, do not allow any others to run.
1991 (Where X, of course, is anything except -1)
1993 Note that a resume may not `take' if there are pending exceptions/&c
1994 still unprocessed from the last resume we did (any given resume may result
1995 in multiple events returned by wait). */
1998 gnu_resume (struct target_ops *ops,
1999 ptid_t ptid, int step, enum gdb_signal sig)
2001 struct proc *step_thread = 0;
2003 struct inf *inf = gnu_current_inf;
2005 inf_debug (inf, "ptid = %s, step = %d, sig = %d",
2006 target_pid_to_str (ptid), step, sig);
2008 inf_validate_procinfo (inf);
2010 if (sig != GDB_SIGNAL_0 || inf->stopped)
2012 if (sig == GDB_SIGNAL_0 && inf->nomsg)
2015 inf_signal (inf, sig);
2017 else if (inf->wait.exc.reply != MACH_PORT_NULL)
2018 /* We received an exception to which we have chosen not to forward, so
2019 abort the faulting thread, which will perhaps retake it. */
2021 proc_abort (inf->wait.thread, 1);
2022 warning (_("Aborting %s with unforwarded exception %s."),
2023 proc_string (inf->wait.thread),
2024 gdb_signal_to_name (inf->wait.status.value.sig));
2027 if (port_msgs_queued (inf->event_port))
2028 /* If there are still messages in our event queue, don't bother resuming
2029 the process, as we're just going to stop it right away anyway. */
2032 inf_update_procs (inf);
2034 /* A specific PTID means `step only this process id'. */
2035 resume_all = ptid_equal (ptid, minus_one_ptid);
2038 /* Allow all threads to run, except perhaps single-stepping one. */
2040 inf_debug (inf, "running all threads; tid = %d",
2041 ptid_get_pid (inferior_ptid));
2042 ptid = inferior_ptid; /* What to step. */
2043 inf_set_threads_resume_sc (inf, 0, 1);
2046 /* Just allow a single thread to run. */
2048 struct proc *thread = inf_tid_to_thread (inf, ptid_get_lwp (ptid));
2051 error (_("Can't run single thread id %s: no such thread!"),
2052 target_pid_to_str (ptid));
2053 inf_debug (inf, "running one thread: %s", target_pid_to_str (ptid));
2054 inf_set_threads_resume_sc (inf, thread, 0);
2059 step_thread = inf_tid_to_thread (inf, ptid_get_lwp (ptid));
2061 warning (_("Can't step thread id %s: no such thread."),
2062 target_pid_to_str (ptid));
2064 inf_debug (inf, "stepping thread: %s", target_pid_to_str (ptid));
2066 if (step_thread != inf->step_thread)
2067 inf_set_step_thread (inf, step_thread);
2069 inf_debug (inf, "here we go...");
2075 gnu_kill_inferior (struct target_ops *ops)
2077 struct proc *task = gnu_current_inf->task;
2081 proc_debug (task, "terminating...");
2082 task_terminate (task->port);
2083 inf_set_pid (gnu_current_inf, -1);
2085 target_mourn_inferior ();
2088 /* Clean up after the inferior dies. */
2090 gnu_mourn_inferior (struct target_ops *ops)
2092 inf_debug (gnu_current_inf, "rip");
2093 inf_detach (gnu_current_inf);
2094 unpush_target (ops);
2095 generic_mourn_inferior ();
2099 /* Fork an inferior process, and start debugging it. */
2101 /* Set INFERIOR_PID to the first thread available in the child, if any. */
2103 inf_pick_first_thread (void)
2105 if (gnu_current_inf->task && gnu_current_inf->threads)
2106 /* The first thread. */
2107 return gnu_current_inf->threads->tid;
2109 /* What may be the next thread. */
2110 return next_thread_id;
2116 if (!gnu_current_inf)
2117 gnu_current_inf = make_inf ();
2118 return gnu_current_inf;
2122 gnu_create_inferior (struct target_ops *ops,
2123 char *exec_file, char *allargs, char **env,
2126 struct inf *inf = cur_inf ();
2129 void trace_me (void)
2131 /* We're in the child; make this process stop as soon as it execs. */
2132 inf_debug (inf, "tracing self");
2133 if (ptrace (PTRACE_TRACEME) != 0)
2134 error (_("ptrace (PTRACE_TRACEME) failed!"));
2137 inf_debug (inf, "creating inferior");
2139 pid = fork_inferior (exec_file, allargs, env, trace_me,
2140 NULL, NULL, NULL, NULL);
2142 /* Attach to the now stopped child, which is actually a shell... */
2143 inf_debug (inf, "attaching to child: %d", pid);
2145 inf_attach (inf, pid);
2149 inf->pending_execs = 2;
2153 /* Now let the child run again, knowing that it will stop
2154 immediately because of the ptrace. */
2157 /* We now have thread info. */
2158 thread_change_ptid (inferior_ptid,
2159 ptid_build (inf->pid, inf_pick_first_thread (), 0));
2161 startup_inferior (inf->pending_execs);
2163 inf_validate_procinfo (inf);
2164 inf_update_signal_thread (inf);
2165 inf_set_traced (inf, inf->want_signals);
2167 /* Execing the process will have trashed our exception ports; steal them
2168 back (or make sure they're restored if the user wants that). */
2169 if (inf->want_exceptions)
2170 inf_steal_exc_ports (inf);
2172 inf_restore_exc_ports (inf);
2176 /* Attach to process PID, then initialize for debugging it
2177 and wait for the trace-trap that results from attaching. */
2179 gnu_attach (struct target_ops *ops, char *args, int from_tty)
2183 struct inf *inf = cur_inf ();
2184 struct inferior *inferior;
2186 pid = parse_pid_to_attach (args);
2188 if (pid == getpid ()) /* Trying to masturbate? */
2189 error (_("I refuse to debug myself!"));
2193 exec_file = (char *) get_exec_file (0);
2196 printf_unfiltered ("Attaching to program `%s', pid %d\n",
2199 printf_unfiltered ("Attaching to pid %d\n", pid);
2201 gdb_flush (gdb_stdout);
2204 inf_debug (inf, "attaching to pid: %d", pid);
2206 inf_attach (inf, pid);
2210 inferior = current_inferior ();
2211 inferior_appeared (inferior, pid);
2212 inferior->attach_flag = 1;
2214 inf_update_procs (inf);
2216 inferior_ptid = ptid_build (pid, inf_pick_first_thread (), 0);
2218 /* We have to initialize the terminal settings now, since the code
2219 below might try to restore them. */
2220 target_terminal_init ();
2222 /* If the process was stopped before we attached, make it continue the next
2223 time the user does a continue. */
2224 inf_validate_procinfo (inf);
2226 inf_update_signal_thread (inf);
2227 inf_set_traced (inf, inf->want_signals);
2229 #if 0 /* Do we need this? */
2230 renumber_threads (0); /* Give our threads reasonable names. */
2235 /* Take a program previously attached to and detaches it.
2236 The program resumes execution and will no longer stop
2237 on signals, etc. We'd better not have left any breakpoints
2238 in the program or it'll die when it hits one. For this
2239 to work, it may be necessary for the process to have been
2240 previously attached. It *might* work if the program was
2241 started via fork. */
2243 gnu_detach (struct target_ops *ops, const char *args, int from_tty)
2249 char *exec_file = get_exec_file (0);
2252 printf_unfiltered ("Detaching from program `%s' pid %d\n",
2253 exec_file, gnu_current_inf->pid);
2255 printf_unfiltered ("Detaching from pid %d\n", gnu_current_inf->pid);
2256 gdb_flush (gdb_stdout);
2259 pid = gnu_current_inf->pid;
2261 inf_detach (gnu_current_inf);
2263 inferior_ptid = null_ptid;
2264 detach_inferior (pid);
2266 unpush_target (ops); /* Pop out of handling an inferior. */
2270 gnu_terminal_init_inferior (void)
2272 gdb_assert (gnu_current_inf);
2273 terminal_init_inferior_with_pgrp (gnu_current_inf->pid);
2277 gnu_stop (ptid_t ptid)
2279 error (_("to_stop target function not implemented"));
2283 gnu_thread_alive (struct target_ops *ops, ptid_t ptid)
2285 inf_update_procs (gnu_current_inf);
2286 return !!inf_tid_to_thread (gnu_current_inf,
2287 ptid_get_lwp (ptid));
2291 /* Read inferior task's LEN bytes from ADDR and copy it to MYADDR in
2292 gdb's address space. Return 0 on failure; number of bytes read
2295 gnu_read_inferior (task_t task, CORE_ADDR addr, gdb_byte *myaddr, int length)
2298 vm_address_t low_address = (vm_address_t) trunc_page (addr);
2299 vm_size_t aligned_length =
2300 (vm_size_t) round_page (addr + length) - low_address;
2304 /* Get memory from inferior with page aligned addresses. */
2305 err = vm_read (task, low_address, aligned_length, &copied, ©_count);
2309 err = hurd_safe_copyin (myaddr, (void *) (addr - low_address + copied),
2313 warning (_("Read from inferior faulted: %s"), safe_strerror (err));
2317 err = vm_deallocate (mach_task_self (), copied, copy_count);
2319 warning (_("gnu_read_inferior vm_deallocate failed: %s"),
2320 safe_strerror (err));
2325 #define CHK_GOTO_OUT(str,ret) \
2326 do if (ret != KERN_SUCCESS) { errstr = #str; goto out; } while(0)
2328 struct vm_region_list
2330 struct vm_region_list *next;
2331 vm_prot_t protection;
2336 struct obstack region_obstack;
2338 /* Write gdb's LEN bytes from MYADDR and copy it to ADDR in inferior
2339 task's address space. */
2341 gnu_write_inferior (task_t task, CORE_ADDR addr,
2342 const gdb_byte *myaddr, int length)
2345 vm_address_t low_address = (vm_address_t) trunc_page (addr);
2346 vm_size_t aligned_length =
2347 (vm_size_t) round_page (addr + length) - low_address;
2352 char *errstr = "Bug in gnu_write_inferior";
2354 struct vm_region_list *region_element;
2355 struct vm_region_list *region_head = (struct vm_region_list *) NULL;
2357 /* Get memory from inferior with page aligned addresses. */
2358 err = vm_read (task,
2363 CHK_GOTO_OUT ("gnu_write_inferior vm_read failed", err);
2367 err = hurd_safe_copyout ((void *) (addr - low_address + copied),
2369 CHK_GOTO_OUT ("Write to inferior faulted", err);
2371 obstack_init (®ion_obstack);
2373 /* Do writes atomically.
2374 First check for holes and unwritable memory. */
2376 vm_size_t remaining_length = aligned_length;
2377 vm_address_t region_address = low_address;
2379 struct vm_region_list *scan;
2381 while (region_address < low_address + aligned_length)
2383 vm_prot_t protection;
2384 vm_prot_t max_protection;
2385 vm_inherit_t inheritance;
2387 mach_port_t object_name;
2389 vm_size_t region_length = remaining_length;
2390 vm_address_t old_address = region_address;
2392 err = vm_region (task,
2401 CHK_GOTO_OUT ("vm_region failed", err);
2403 /* Check for holes in memory. */
2404 if (old_address != region_address)
2406 warning (_("No memory at 0x%x. Nothing written"),
2413 if (!(max_protection & VM_PROT_WRITE))
2415 warning (_("Memory at address 0x%x is unwritable. "
2423 /* Chain the regions for later use. */
2425 (struct vm_region_list *)
2426 obstack_alloc (®ion_obstack, sizeof (struct vm_region_list));
2428 region_element->protection = protection;
2429 region_element->start = region_address;
2430 region_element->length = region_length;
2432 /* Chain the regions along with protections. */
2433 region_element->next = region_head;
2434 region_head = region_element;
2436 region_address += region_length;
2437 remaining_length = remaining_length - region_length;
2440 /* If things fail after this, we give up.
2441 Somebody is messing up inferior_task's mappings. */
2443 /* Enable writes to the chained vm regions. */
2444 for (scan = region_head; scan; scan = scan->next)
2446 if (!(scan->protection & VM_PROT_WRITE))
2448 err = vm_protect (task,
2452 scan->protection | VM_PROT_WRITE);
2453 CHK_GOTO_OUT ("vm_protect: enable write failed", err);
2457 err = vm_write (task,
2461 CHK_GOTO_OUT ("vm_write failed", err);
2463 /* Set up the original region protections, if they were changed. */
2464 for (scan = region_head; scan; scan = scan->next)
2466 if (!(scan->protection & VM_PROT_WRITE))
2468 err = vm_protect (task,
2473 CHK_GOTO_OUT ("vm_protect: enable write failed", err);
2481 obstack_free (®ion_obstack, 0);
2483 (void) vm_deallocate (mach_task_self (),
2488 if (err != KERN_SUCCESS)
2490 warning (_("%s: %s"), errstr, mach_error_string (err));
2499 /* Implement the to_xfer_partial target_ops method for
2500 TARGET_OBJECT_MEMORY. */
2502 static enum target_xfer_status
2503 gnu_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf,
2504 CORE_ADDR memaddr, ULONGEST len, ULONGEST *xfered_len)
2506 task_t task = (gnu_current_inf
2507 ? (gnu_current_inf->task
2508 ? gnu_current_inf->task->port : 0)
2512 if (task == MACH_PORT_NULL)
2513 return TARGET_XFER_E_IO;
2515 if (writebuf != NULL)
2517 inf_debug (gnu_current_inf, "writing %s[%s] <-- %s",
2518 paddress (target_gdbarch (), memaddr), pulongest (len),
2519 host_address_to_string (writebuf));
2520 res = gnu_write_inferior (task, memaddr, writebuf, len);
2524 inf_debug (gnu_current_inf, "reading %s[%s] --> %s",
2525 paddress (target_gdbarch (), memaddr), pulongest (len),
2526 host_address_to_string (readbuf));
2527 res = gnu_read_inferior (task, memaddr, readbuf, len);
2529 gdb_assert (res >= 0);
2531 return TARGET_XFER_E_IO;
2534 *xfered_len = (ULONGEST) res;
2535 return TARGET_XFER_OK;
2539 /* Target to_xfer_partial implementation. */
2541 static enum target_xfer_status
2542 gnu_xfer_partial (struct target_ops *ops, enum target_object object,
2543 const char *annex, gdb_byte *readbuf,
2544 const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
2545 ULONGEST *xfered_len)
2549 case TARGET_OBJECT_MEMORY:
2550 return gnu_xfer_memory (readbuf, writebuf, offset, len, xfered_len);
2552 return TARGET_XFER_E_IO;
2556 /* Call FUNC on each memory region in the task. */
2558 gnu_find_memory_regions (find_memory_region_ftype func, void *data)
2562 vm_address_t region_address, last_region_address, last_region_end;
2563 vm_prot_t last_protection;
2565 if (gnu_current_inf == 0 || gnu_current_inf->task == 0)
2567 task = gnu_current_inf->task->port;
2568 if (task == MACH_PORT_NULL)
2571 region_address = last_region_address = last_region_end = VM_MIN_ADDRESS;
2572 last_protection = VM_PROT_NONE;
2573 while (region_address < VM_MAX_ADDRESS)
2575 vm_prot_t protection;
2576 vm_prot_t max_protection;
2577 vm_inherit_t inheritance;
2579 mach_port_t object_name;
2581 vm_size_t region_length = VM_MAX_ADDRESS - region_address;
2582 vm_address_t old_address = region_address;
2584 err = vm_region (task,
2593 if (err == KERN_NO_SPACE)
2595 if (err != KERN_SUCCESS)
2597 warning (_("vm_region failed: %s"), mach_error_string (err));
2601 if (protection == last_protection && region_address == last_region_end)
2602 /* This region is contiguous with and indistinguishable from
2603 the previous one, so we just extend that one. */
2604 last_region_end = region_address += region_length;
2607 /* This region is distinct from the last one we saw, so report
2608 that previous one. */
2609 if (last_protection != VM_PROT_NONE)
2610 (*func) (last_region_address,
2611 last_region_end - last_region_address,
2612 last_protection & VM_PROT_READ,
2613 last_protection & VM_PROT_WRITE,
2614 last_protection & VM_PROT_EXECUTE,
2615 1, /* MODIFIED is unknown, pass it as true. */
2617 last_region_address = region_address;
2618 last_region_end = region_address += region_length;
2619 last_protection = protection;
2623 /* Report the final region. */
2624 if (last_region_end > last_region_address && last_protection != VM_PROT_NONE)
2625 (*func) (last_region_address, last_region_end - last_region_address,
2626 last_protection & VM_PROT_READ,
2627 last_protection & VM_PROT_WRITE,
2628 last_protection & VM_PROT_EXECUTE,
2629 1, /* MODIFIED is unknown, pass it as true. */
2636 /* Return printable description of proc. */
2638 proc_string (struct proc *proc)
2640 static char tid_str[80];
2642 if (proc_is_task (proc))
2643 xsnprintf (tid_str, sizeof (tid_str), "process %d", proc->inf->pid);
2645 xsnprintf (tid_str, sizeof (tid_str), "Thread %d.%d",
2646 proc->inf->pid, proc->tid);
2651 gnu_pid_to_str (struct target_ops *ops, ptid_t ptid)
2653 struct inf *inf = gnu_current_inf;
2654 int tid = ptid_get_lwp (ptid);
2655 struct proc *thread = inf_tid_to_thread (inf, tid);
2658 return proc_string (thread);
2661 static char tid_str[80];
2663 xsnprintf (tid_str, sizeof (tid_str), "bogus thread id %d", tid);
2669 /* Create a prototype generic GNU/Hurd target. The client can
2670 override it with local methods. */
2675 struct target_ops *t = inf_child_target ();
2677 t->to_shortname = "GNU";
2678 t->to_longname = "GNU Hurd process";
2679 t->to_doc = "GNU Hurd process";
2681 t->to_attach = gnu_attach;
2682 t->to_attach_no_wait = 1;
2683 t->to_detach = gnu_detach;
2684 t->to_resume = gnu_resume;
2685 t->to_wait = gnu_wait;
2686 t->to_xfer_partial = gnu_xfer_partial;
2687 t->to_find_memory_regions = gnu_find_memory_regions;
2688 t->to_terminal_init = gnu_terminal_init_inferior;
2689 t->to_kill = gnu_kill_inferior;
2690 t->to_create_inferior = gnu_create_inferior;
2691 t->to_mourn_inferior = gnu_mourn_inferior;
2692 t->to_thread_alive = gnu_thread_alive;
2693 t->to_pid_to_str = gnu_pid_to_str;
2694 t->to_stop = gnu_stop;
2700 /* User task commands. */
2702 static struct cmd_list_element *set_task_cmd_list = 0;
2703 static struct cmd_list_element *show_task_cmd_list = 0;
2704 /* User thread commands. */
2706 /* Commands with a prefix of `set/show thread'. */
2707 extern struct cmd_list_element *thread_cmd_list;
2708 struct cmd_list_element *set_thread_cmd_list = NULL;
2709 struct cmd_list_element *show_thread_cmd_list = NULL;
2711 /* Commands with a prefix of `set/show thread default'. */
2712 struct cmd_list_element *set_thread_default_cmd_list = NULL;
2713 struct cmd_list_element *show_thread_default_cmd_list = NULL;
2716 set_thread_cmd (char *args, int from_tty)
2718 printf_unfiltered ("\"set thread\" must be followed by the "
2719 "name of a thread property, or \"default\".\n");
2723 show_thread_cmd (char *args, int from_tty)
2725 printf_unfiltered ("\"show thread\" must be followed by the "
2726 "name of a thread property, or \"default\".\n");
2730 set_thread_default_cmd (char *args, int from_tty)
2732 printf_unfiltered ("\"set thread default\" must be followed "
2733 "by the name of a thread property.\n");
2737 show_thread_default_cmd (char *args, int from_tty)
2739 printf_unfiltered ("\"show thread default\" must be followed "
2740 "by the name of a thread property.\n");
2744 parse_int_arg (char *args, char *cmd_prefix)
2749 int val = strtoul (args, &arg_end, 10);
2751 if (*args && *arg_end == '\0')
2754 error (_("Illegal argument for \"%s\" command, should be an integer."),
2759 _parse_bool_arg (char *args, char *t_val, char *f_val, char *cmd_prefix)
2761 if (!args || strcmp (args, t_val) == 0)
2763 else if (strcmp (args, f_val) == 0)
2766 error (_("Illegal argument for \"%s\" command, "
2767 "should be \"%s\" or \"%s\"."),
2768 cmd_prefix, t_val, f_val);
2771 #define parse_bool_arg(args, cmd_prefix) \
2772 _parse_bool_arg (args, "on", "off", cmd_prefix)
2775 check_empty (char *args, char *cmd_prefix)
2778 error (_("Garbage after \"%s\" command: `%s'"), cmd_prefix, args);
2781 /* Returns the alive thread named by INFERIOR_PID, or signals an error. */
2782 static struct proc *
2785 struct inf *inf = cur_inf ();
2786 struct proc *thread = inf_tid_to_thread (inf,
2787 ptid_get_lwp (inferior_ptid));
2789 error (_("No current thread."));
2793 /* Returns the current inferior, but signals an error if it has no task. */
2797 struct inf *inf = cur_inf ();
2800 error (_("No current process."));
2806 set_task_pause_cmd (char *args, int from_tty)
2808 struct inf *inf = cur_inf ();
2809 int old_sc = inf->pause_sc;
2811 inf->pause_sc = parse_bool_arg (args, "set task pause");
2813 if (old_sc == 0 && inf->pause_sc != 0)
2814 /* If the task is currently unsuspended, immediately suspend it,
2815 otherwise wait until the next time it gets control. */
2820 show_task_pause_cmd (char *args, int from_tty)
2822 struct inf *inf = cur_inf ();
2824 check_empty (args, "show task pause");
2825 printf_unfiltered ("The inferior task %s suspended while gdb has control.\n",
2827 ? (inf->pause_sc == 0 ? "isn't" : "is")
2828 : (inf->pause_sc == 0 ? "won't be" : "will be"));
2832 set_task_detach_sc_cmd (char *args, int from_tty)
2834 cur_inf ()->detach_sc = parse_int_arg (args,
2835 "set task detach-suspend-count");
2839 show_task_detach_sc_cmd (char *args, int from_tty)
2841 check_empty (args, "show task detach-suspend-count");
2842 printf_unfiltered ("The inferior task will be left with a "
2843 "suspend count of %d when detaching.\n",
2844 cur_inf ()->detach_sc);
2849 set_thread_default_pause_cmd (char *args, int from_tty)
2851 struct inf *inf = cur_inf ();
2853 inf->default_thread_pause_sc =
2854 parse_bool_arg (args, "set thread default pause") ? 0 : 1;
2858 show_thread_default_pause_cmd (char *args, int from_tty)
2860 struct inf *inf = cur_inf ();
2861 int sc = inf->default_thread_pause_sc;
2863 check_empty (args, "show thread default pause");
2864 printf_unfiltered ("New threads %s suspended while gdb has control%s.\n",
2865 sc ? "are" : "aren't",
2866 !sc && inf->pause_sc ? " (but the task is)" : "");
2870 set_thread_default_run_cmd (char *args, int from_tty)
2872 struct inf *inf = cur_inf ();
2874 inf->default_thread_run_sc =
2875 parse_bool_arg (args, "set thread default run") ? 0 : 1;
2879 show_thread_default_run_cmd (char *args, int from_tty)
2881 struct inf *inf = cur_inf ();
2883 check_empty (args, "show thread default run");
2884 printf_unfiltered ("New threads %s allowed to run.\n",
2885 inf->default_thread_run_sc == 0 ? "are" : "aren't");
2889 set_thread_default_detach_sc_cmd (char *args, int from_tty)
2891 cur_inf ()->default_thread_detach_sc =
2892 parse_int_arg (args, "set thread default detach-suspend-count");
2896 show_thread_default_detach_sc_cmd (char *args, int from_tty)
2898 check_empty (args, "show thread default detach-suspend-count");
2899 printf_unfiltered ("New threads will get a detach-suspend-count of %d.\n",
2900 cur_inf ()->default_thread_detach_sc);
2904 /* Steal a send right called NAME in the inferior task, and make it PROC's
2905 saved exception port. */
2907 steal_exc_port (struct proc *proc, mach_port_t name)
2911 mach_msg_type_name_t port_type;
2913 if (!proc || !proc->inf->task)
2914 error (_("No inferior task."));
2916 err = mach_port_extract_right (proc->inf->task->port,
2917 name, MACH_MSG_TYPE_COPY_SEND,
2920 error (_("Couldn't extract send right %d from inferior: %s"),
2921 name, safe_strerror (err));
2923 if (proc->saved_exc_port)
2924 /* Get rid of our reference to the old one. */
2925 mach_port_deallocate (mach_task_self (), proc->saved_exc_port);
2927 proc->saved_exc_port = port;
2929 if (!proc->exc_port)
2930 /* If PROC is a thread, we may not have set its exception port
2931 before. We can't use proc_steal_exc_port because it also sets
2934 proc->exc_port = proc->inf->event_port;
2935 err = proc_set_exception_port (proc, proc->exc_port);
2936 error (_("Can't set exception port for %s: %s"),
2937 proc_string (proc), safe_strerror (err));
2942 set_task_exc_port_cmd (char *args, int from_tty)
2944 struct inf *inf = cur_inf ();
2947 error (_("No argument to \"set task exception-port\" command."));
2948 steal_exc_port (inf->task, parse_and_eval_address (args));
2952 set_stopped_cmd (char *args, int from_tty)
2954 cur_inf ()->stopped = _parse_bool_arg (args, "yes", "no", "set stopped");
2958 show_stopped_cmd (char *args, int from_tty)
2960 struct inf *inf = active_inf ();
2962 check_empty (args, "show stopped");
2963 printf_unfiltered ("The inferior process %s stopped.\n",
2964 inf->stopped ? "is" : "isn't");
2968 set_sig_thread_cmd (char *args, int from_tty)
2970 struct inf *inf = cur_inf ();
2972 if (!args || (!isdigit (*args) && strcmp (args, "none") != 0))
2973 error (_("Illegal argument to \"set signal-thread\" command.\n"
2974 "Should be an integer thread ID, or `none'."));
2976 if (strcmp (args, "none") == 0)
2977 inf->signal_thread = 0;
2980 ptid_t ptid = thread_id_to_pid (atoi (args));
2982 if (ptid_equal (ptid, minus_one_ptid))
2983 error (_("Thread ID %s not known. "
2984 "Use the \"info threads\" command to\n"
2985 "see the IDs of currently known threads."), args);
2986 inf->signal_thread = inf_tid_to_thread (inf, ptid_get_lwp (ptid));
2991 show_sig_thread_cmd (char *args, int from_tty)
2993 struct inf *inf = active_inf ();
2995 check_empty (args, "show signal-thread");
2996 if (inf->signal_thread)
2997 printf_unfiltered ("The signal thread is %s.\n",
2998 proc_string (inf->signal_thread));
3000 printf_unfiltered ("There is no signal thread.\n");
3005 set_signals_cmd (char *args, int from_tty)
3007 struct inf *inf = cur_inf ();
3009 inf->want_signals = parse_bool_arg (args, "set signals");
3011 if (inf->task && inf->want_signals != inf->traced)
3012 /* Make this take effect immediately in a running process. */
3013 inf_set_traced (inf, inf->want_signals);
3017 show_signals_cmd (char *args, int from_tty)
3019 struct inf *inf = cur_inf ();
3021 check_empty (args, "show signals");
3022 printf_unfiltered ("The inferior process's signals %s intercepted.\n",
3024 ? (inf->traced ? "are" : "aren't")
3025 : (inf->want_signals ? "will be" : "won't be"));
3029 set_exceptions_cmd (char *args, int from_tty)
3031 struct inf *inf = cur_inf ();
3032 int val = parse_bool_arg (args, "set exceptions");
3034 /* Make this take effect immediately in a running process. */
3037 inf->want_exceptions = val;
3041 show_exceptions_cmd (char *args, int from_tty)
3043 struct inf *inf = cur_inf ();
3045 check_empty (args, "show exceptions");
3046 printf_unfiltered ("Exceptions in the inferior %s trapped.\n",
3048 ? (inf->want_exceptions ? "are" : "aren't")
3049 : (inf->want_exceptions ? "will be" : "won't be"));
3054 set_task_cmd (char *args, int from_tty)
3056 printf_unfiltered ("\"set task\" must be followed by the name"
3057 " of a task property.\n");
3061 show_task_cmd (char *args, int from_tty)
3063 struct inf *inf = cur_inf ();
3065 check_empty (args, "show task");
3067 show_signals_cmd (0, from_tty);
3068 show_exceptions_cmd (0, from_tty);
3069 show_task_pause_cmd (0, from_tty);
3071 if (inf->pause_sc == 0)
3072 show_thread_default_pause_cmd (0, from_tty);
3073 show_thread_default_run_cmd (0, from_tty);
3077 show_stopped_cmd (0, from_tty);
3078 show_sig_thread_cmd (0, from_tty);
3081 if (inf->detach_sc != 0)
3082 show_task_detach_sc_cmd (0, from_tty);
3083 if (inf->default_thread_detach_sc != 0)
3084 show_thread_default_detach_sc_cmd (0, from_tty);
3089 set_noninvasive_cmd (char *args, int from_tty)
3091 /* Invert the sense of the arg for each component. */
3092 char *inv_args = parse_bool_arg (args, "set noninvasive") ? "off" : "on";
3094 set_task_pause_cmd (inv_args, from_tty);
3095 set_signals_cmd (inv_args, from_tty);
3096 set_exceptions_cmd (inv_args, from_tty);
3101 info_port_rights (const char *args, mach_port_type_t only)
3103 struct inf *inf = active_inf ();
3104 struct value *vmark = value_mark ();
3107 /* Explicit list of port rights. */
3111 struct value *val = parse_to_comma_and_eval (&args);
3112 long right = value_as_long (val);
3114 print_port_info (right, 0, inf->task->port, PORTINFO_DETAILS,
3118 error (_("%ld: %s."), right, safe_strerror (err));
3122 /* Print all of them. */
3125 print_task_ports_info (inf->task->port, only, PORTINFO_DETAILS,
3128 error (_("%s."), safe_strerror (err));
3131 value_free_to_mark (vmark);
3135 info_send_rights_cmd (char *args, int from_tty)
3137 info_port_rights (args, MACH_PORT_TYPE_SEND);
3141 info_recv_rights_cmd (char *args, int from_tty)
3143 info_port_rights (args, MACH_PORT_TYPE_RECEIVE);
3147 info_port_sets_cmd (char *args, int from_tty)
3149 info_port_rights (args, MACH_PORT_TYPE_PORT_SET);
3153 info_dead_names_cmd (char *args, int from_tty)
3155 info_port_rights (args, MACH_PORT_TYPE_DEAD_NAME);
3159 info_port_rights_cmd (char *args, int from_tty)
3161 info_port_rights (args, ~0);
3166 add_task_commands (void)
3168 add_cmd ("pause", class_run, set_thread_default_pause_cmd, _("\
3169 Set whether the new threads are suspended while gdb has control.\n\
3170 This property normally has no effect because the whole task is\n\
3171 suspended, however, that may be disabled with \"set task pause off\".\n\
3172 The default value is \"off\"."),
3173 &set_thread_default_cmd_list);
3174 add_cmd ("pause", no_class, show_thread_default_pause_cmd, _("\
3175 Show whether new threads are suspended while gdb has control."),
3176 &show_thread_default_cmd_list);
3178 add_cmd ("run", class_run, set_thread_default_run_cmd, _("\
3179 Set whether new threads are allowed to run (once gdb has noticed them)."),
3180 &set_thread_default_cmd_list);
3181 add_cmd ("run", no_class, show_thread_default_run_cmd, _("\
3182 Show whether new threads are allowed to run (once gdb has noticed them)."),
3183 &show_thread_default_cmd_list);
3185 add_cmd ("detach-suspend-count", class_run, set_thread_default_detach_sc_cmd,
3186 _("Set the default detach-suspend-count value for new threads."),
3187 &set_thread_default_cmd_list);
3188 add_cmd ("detach-suspend-count", no_class, show_thread_default_detach_sc_cmd,
3189 _("Show the default detach-suspend-count value for new threads."),
3190 &show_thread_default_cmd_list);
3192 add_cmd ("signals", class_run, set_signals_cmd, _("\
3193 Set whether the inferior process's signals will be intercepted.\n\
3194 Mach exceptions (such as breakpoint traps) are not affected."),
3196 add_alias_cmd ("sigs", "signals", class_run, 1, &setlist);
3197 add_cmd ("signals", no_class, show_signals_cmd, _("\
3198 Show whether the inferior process's signals will be intercepted."),
3200 add_alias_cmd ("sigs", "signals", no_class, 1, &showlist);
3202 add_cmd ("signal-thread", class_run, set_sig_thread_cmd, _("\
3203 Set the thread that gdb thinks is the libc signal thread.\n\
3204 This thread is run when delivering a signal to a non-stopped process."),
3206 add_alias_cmd ("sigthread", "signal-thread", class_run, 1, &setlist);
3207 add_cmd ("signal-thread", no_class, show_sig_thread_cmd, _("\
3208 Set the thread that gdb thinks is the libc signal thread."),
3210 add_alias_cmd ("sigthread", "signal-thread", no_class, 1, &showlist);
3212 add_cmd ("stopped", class_run, set_stopped_cmd, _("\
3213 Set whether gdb thinks the inferior process is stopped as with SIGSTOP.\n\
3214 Stopped process will be continued by sending them a signal."),
3216 add_cmd ("stopped", no_class, show_stopped_cmd, _("\
3217 Show whether gdb thinks the inferior process is stopped as with SIGSTOP."),
3220 add_cmd ("exceptions", class_run, set_exceptions_cmd, _("\
3221 Set whether exceptions in the inferior process will be trapped.\n\
3222 When exceptions are turned off, neither breakpoints nor single-stepping\n\
3225 /* Allow `set exc' despite conflict with `set exception-port'. */
3226 add_alias_cmd ("exc", "exceptions", class_run, 1, &setlist);
3227 add_cmd ("exceptions", no_class, show_exceptions_cmd, _("\
3228 Show whether exceptions in the inferior process will be trapped."),
3231 add_prefix_cmd ("task", no_class, set_task_cmd,
3232 _("Command prefix for setting task attributes."),
3233 &set_task_cmd_list, "set task ", 0, &setlist);
3234 add_prefix_cmd ("task", no_class, show_task_cmd,
3235 _("Command prefix for showing task attributes."),
3236 &show_task_cmd_list, "show task ", 0, &showlist);
3238 add_cmd ("pause", class_run, set_task_pause_cmd, _("\
3239 Set whether the task is suspended while gdb has control.\n\
3240 A value of \"on\" takes effect immediately, otherwise nothing happens\n\
3241 until the next time the program is continued.\n\
3242 When setting this to \"off\", \"set thread default pause on\" can be\n\
3243 used to pause individual threads by default instead."),
3244 &set_task_cmd_list);
3245 add_cmd ("pause", no_class, show_task_pause_cmd,
3246 _("Show whether the task is suspended while gdb has control."),
3247 &show_task_cmd_list);
3249 add_cmd ("detach-suspend-count", class_run, set_task_detach_sc_cmd,
3250 _("Set the suspend count will leave on the thread when detaching."),
3251 &set_task_cmd_list);
3252 add_cmd ("detach-suspend-count", no_class, show_task_detach_sc_cmd,
3253 _("Show the suspend count will leave "
3254 "on the thread when detaching."),
3255 &show_task_cmd_list);
3257 add_cmd ("exception-port", no_class, set_task_exc_port_cmd, _("\
3258 Set the task exception port to which we forward exceptions.\n\
3259 The argument should be the value of the send right in the task."),
3260 &set_task_cmd_list);
3261 add_alias_cmd ("excp", "exception-port", no_class, 1, &set_task_cmd_list);
3262 add_alias_cmd ("exc-port", "exception-port", no_class, 1,
3263 &set_task_cmd_list);
3265 /* A convenient way of turning on all options require to noninvasively
3266 debug running tasks. */
3267 add_cmd ("noninvasive", no_class, set_noninvasive_cmd, _("\
3268 Set task options so that we interfere as little as possible.\n\
3269 This is the same as setting `task pause', `exceptions', and\n\
3270 `signals' to the opposite value."),
3273 /* Commands to show information about the task's ports. */
3274 add_cmd ("send-rights", class_info, info_send_rights_cmd,
3275 _("Show information about the task's send rights"),
3277 add_cmd ("receive-rights", class_info, info_recv_rights_cmd,
3278 _("Show information about the task's receive rights"),
3280 add_cmd ("port-rights", class_info, info_port_rights_cmd,
3281 _("Show information about the task's port rights"),
3283 add_cmd ("port-sets", class_info, info_port_sets_cmd,
3284 _("Show information about the task's port sets"),
3286 add_cmd ("dead-names", class_info, info_dead_names_cmd,
3287 _("Show information about the task's dead names"),
3289 add_info_alias ("ports", "port-rights", 1);
3290 add_info_alias ("port", "port-rights", 1);
3291 add_info_alias ("psets", "port-sets", 1);
3296 set_thread_pause_cmd (char *args, int from_tty)
3298 struct proc *thread = cur_thread ();
3299 int old_sc = thread->pause_sc;
3301 thread->pause_sc = parse_bool_arg (args, "set thread pause");
3302 if (old_sc == 0 && thread->pause_sc != 0 && thread->inf->pause_sc == 0)
3303 /* If the task is currently unsuspended, immediately suspend it,
3304 otherwise wait until the next time it gets control. */
3305 inf_suspend (thread->inf);
3309 show_thread_pause_cmd (char *args, int from_tty)
3311 struct proc *thread = cur_thread ();
3312 int sc = thread->pause_sc;
3314 check_empty (args, "show task pause");
3315 printf_unfiltered ("Thread %s %s suspended while gdb has control%s.\n",
3316 proc_string (thread),
3317 sc ? "is" : "isn't",
3318 !sc && thread->inf->pause_sc ? " (but the task is)" : "");
3322 set_thread_run_cmd (char *args, int from_tty)
3324 struct proc *thread = cur_thread ();
3326 thread->run_sc = parse_bool_arg (args, "set thread run") ? 0 : 1;
3330 show_thread_run_cmd (char *args, int from_tty)
3332 struct proc *thread = cur_thread ();
3334 check_empty (args, "show thread run");
3335 printf_unfiltered ("Thread %s %s allowed to run.",
3336 proc_string (thread),
3337 thread->run_sc == 0 ? "is" : "isn't");
3341 set_thread_detach_sc_cmd (char *args, int from_tty)
3343 cur_thread ()->detach_sc = parse_int_arg (args,
3344 "set thread detach-suspend-count");
3348 show_thread_detach_sc_cmd (char *args, int from_tty)
3350 struct proc *thread = cur_thread ();
3352 check_empty (args, "show thread detach-suspend-count");
3353 printf_unfiltered ("Thread %s will be left with a suspend count"
3354 " of %d when detaching.\n",
3355 proc_string (thread),
3360 set_thread_exc_port_cmd (char *args, int from_tty)
3362 struct proc *thread = cur_thread ();
3365 error (_("No argument to \"set thread exception-port\" command."));
3366 steal_exc_port (thread, parse_and_eval_address (args));
3371 show_thread_cmd (char *args, int from_tty)
3373 struct proc *thread = cur_thread ();
3375 check_empty (args, "show thread");
3376 show_thread_run_cmd (0, from_tty);
3377 show_thread_pause_cmd (0, from_tty);
3378 if (thread->detach_sc != 0)
3379 show_thread_detach_sc_cmd (0, from_tty);
3384 thread_takeover_sc_cmd (char *args, int from_tty)
3386 struct proc *thread = cur_thread ();
3388 thread_basic_info_data_t _info;
3389 thread_basic_info_t info = &_info;
3390 mach_msg_type_number_t info_len = THREAD_BASIC_INFO_COUNT;
3392 thread_info (thread->port, THREAD_BASIC_INFO, (int *) &info, &info_len);
3394 error (("%s."), safe_strerror (err));
3395 thread->sc = info->suspend_count;
3397 printf_unfiltered ("Suspend count was %d.\n", thread->sc);
3399 vm_deallocate (mach_task_self (), (vm_address_t) info,
3400 info_len * sizeof (int));
3405 add_thread_commands (void)
3407 add_prefix_cmd ("thread", no_class, set_thread_cmd,
3408 _("Command prefix for setting thread properties."),
3409 &set_thread_cmd_list, "set thread ", 0, &setlist);
3410 add_prefix_cmd ("default", no_class, show_thread_cmd,
3411 _("Command prefix for setting default thread properties."),
3412 &set_thread_default_cmd_list, "set thread default ", 0,
3413 &set_thread_cmd_list);
3414 add_prefix_cmd ("thread", no_class, set_thread_default_cmd,
3415 _("Command prefix for showing thread properties."),
3416 &show_thread_cmd_list, "show thread ", 0, &showlist);
3417 add_prefix_cmd ("default", no_class, show_thread_default_cmd,
3418 _("Command prefix for showing default thread properties."),
3419 &show_thread_default_cmd_list, "show thread default ", 0,
3420 &show_thread_cmd_list);
3422 add_cmd ("pause", class_run, set_thread_pause_cmd, _("\
3423 Set whether the current thread is suspended while gdb has control.\n\
3424 A value of \"on\" takes effect immediately, otherwise nothing happens\n\
3425 until the next time the program is continued. This property normally\n\
3426 has no effect because the whole task is suspended, however, that may\n\
3427 be disabled with \"set task pause off\".\n\
3428 The default value is \"off\"."),
3429 &set_thread_cmd_list);
3430 add_cmd ("pause", no_class, show_thread_pause_cmd, _("\
3431 Show whether the current thread is suspended while gdb has control."),
3432 &show_thread_cmd_list);
3434 add_cmd ("run", class_run, set_thread_run_cmd,
3435 _("Set whether the current thread is allowed to run."),
3436 &set_thread_cmd_list);
3437 add_cmd ("run", no_class, show_thread_run_cmd,
3438 _("Show whether the current thread is allowed to run."),
3439 &show_thread_cmd_list);
3441 add_cmd ("detach-suspend-count", class_run, set_thread_detach_sc_cmd, _("\
3442 Set the suspend count will leave on the thread when detaching.\n\
3443 Note that this is relative to suspend count when gdb noticed the thread;\n\
3444 use the `thread takeover-suspend-count' to force it to an absolute value."),
3445 &set_thread_cmd_list);
3446 add_cmd ("detach-suspend-count", no_class, show_thread_detach_sc_cmd, _("\
3447 Show the suspend count will leave on the thread when detaching.\n\
3448 Note that this is relative to suspend count when gdb noticed the thread;\n\
3449 use the `thread takeover-suspend-count' to force it to an absolute value."),
3450 &show_thread_cmd_list);
3452 add_cmd ("exception-port", no_class, set_thread_exc_port_cmd, _("\
3453 Set the thread exception port to which we forward exceptions.\n\
3454 This overrides the task exception port.\n\
3455 The argument should be the value of the send right in the task."),
3456 &set_thread_cmd_list);
3457 add_alias_cmd ("excp", "exception-port", no_class, 1, &set_thread_cmd_list);
3458 add_alias_cmd ("exc-port", "exception-port", no_class, 1,
3459 &set_thread_cmd_list);
3461 add_cmd ("takeover-suspend-count", no_class, thread_takeover_sc_cmd, _("\
3462 Force the threads absolute suspend-count to be gdb's.\n\
3463 Prior to giving this command, gdb's thread suspend-counts are relative\n\
3464 to the thread's initial suspend-count when gdb notices the threads."),
3470 /* -Wmissing-prototypes */
3471 extern initialize_file_ftype _initialize_gnu_nat;
3474 _initialize_gnu_nat (void)
3476 proc_server = getproc ();
3478 add_task_commands ();
3479 add_thread_commands ();
3480 add_setshow_boolean_cmd ("gnu-nat", class_maintenance,
3482 _("Set debugging output for the gnu backend."),
3483 _("Show debugging output for the gnu backend."),
3491 #ifdef FLUSH_INFERIOR_CACHE
3493 /* When over-writing code on some machines the I-Cache must be flushed
3494 explicitly, because it is not kept coherent by the lazy hardware.
3495 This definitely includes breakpoints, for instance, or else we
3496 end up looping in mysterious Bpt traps. */
3499 flush_inferior_icache (CORE_ADDR pc, int amount)
3501 vm_machine_attribute_val_t flush = MATTR_VAL_ICACHE_FLUSH;
3504 ret = vm_machine_attribute (gnu_current_inf->task->port,
3509 if (ret != KERN_SUCCESS)
3510 warning (_("Error flushing inferior's cache : %s"), safe_strerror (ret));
3512 #endif /* FLUSH_INFERIOR_CACHE */