1 /* Interface GDB to the GNU Hurd
2 Copyright (C) 1992, 1995, 1996, 1997, 1999 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 2 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, write to the Free Software
22 Foundation, Inc., 59 Temple Place - Suite 330,
23 Boston, MA 02111-1307, USA.
33 #include <sys/ptrace.h>
35 /* We include this because we don't need the access macros and they conflict
36 with gdb's definitions (ick). This is very non standard! */
37 #define _SYS_WAIT_H /* Inhibit warning from <bits/waitflags.h>. */
38 #include <bits/waitflags.h>
41 #include <mach/message.h>
42 #include <mach/notify.h>
43 #include <mach_error.h>
44 #include <mach/exception.h>
45 #include <mach/vm_attributes.h>
47 #include <hurd/process.h>
48 #include <hurd/process_request.h>
50 #include <hurd/msg_request.h>
51 #include <hurd/signal.h>
52 #include <hurd/interrupt.h>
53 #include <hurd/sigpreempt.h>
69 #include "exc_request_S.h"
71 #include "process_reply_S.h"
72 #include "msg_reply_S.h"
73 #include "exc_request_U.h"
76 static process_t proc_server = MACH_PORT_NULL;
78 /* If we've sent a proc_wait_request to the proc server, the pid of the
79 process we asked about. We can only ever have one outstanding. */
80 int proc_wait_pid = 0;
82 /* The number of wait requests we've sent, and expect replies from. */
83 int proc_waits_pending = 0;
85 int gnu_debug_flag = 0;
89 extern struct target_ops gnu_ops;
91 int inf_update_procs (struct inf *inf);
92 struct inf *make_inf ();
93 void inf_clear_wait (struct inf *inf);
94 void inf_cleanup (struct inf *inf);
95 void inf_startup (struct inf *inf, int pid);
96 int inf_update_suspends (struct inf *inf);
97 void inf_set_pid (struct inf *inf, pid_t pid);
98 void inf_validate_procs (struct inf *inf);
99 void inf_steal_exc_ports (struct inf *inf);
100 void inf_restore_exc_ports (struct inf *inf);
101 struct proc *inf_tid_to_proc (struct inf *inf, int tid);
102 inline void inf_set_threads_resume_sc (struct inf *inf,
103 struct proc *run_thread,
105 inline int inf_set_threads_resume_sc_for_signal_thread (struct inf *inf);
106 inline void inf_suspend (struct inf *inf);
107 inline void inf_resume (struct inf *inf);
108 void inf_set_step_thread (struct inf *inf, struct proc *proc);
109 void inf_detach (struct inf *inf);
110 void inf_attach (struct inf *inf, int pid);
111 void inf_signal (struct inf *inf, enum target_signal sig);
112 void inf_continue (struct inf *inf);
114 #define inf_debug(_inf, msg, args...) \
115 do { struct inf *__inf = (_inf); \
116 debug ("{inf %d %p}: " msg, __inf->pid, __inf , ##args); } while (0)
118 void proc_abort (struct proc *proc, int force);
119 thread_state_t proc_get_state (struct proc *proc, int force);
120 struct proc *make_proc (struct inf *inf, mach_port_t port, int tid);
121 struct proc *_proc_free (struct proc *proc);
122 int proc_update_sc (struct proc *proc);
123 error_t proc_get_exception_port (struct proc *proc, mach_port_t * port);
124 error_t proc_set_exception_port (struct proc *proc, mach_port_t port);
125 static mach_port_t _proc_get_exc_port (struct proc *proc);
126 void proc_steal_exc_port (struct proc *proc, mach_port_t exc_port);
127 void proc_restore_exc_port (struct proc *proc);
128 int proc_trace (struct proc *proc, int set);
129 char *proc_string (struct proc *proc);
131 /* Evaluate RPC_EXPR in a scope with the variables MSGPORT and REFPORT bound
132 to INF's msg port and task port respectively. If it has no msg port,
133 EIEIO is returned. INF must refer to a running process! */
134 #define INF_MSGPORT_RPC(inf, rpc_expr) \
135 HURD_MSGPORT_RPC (proc_getmsgport (proc_server, inf->pid, &msgport), \
136 (refport = inf->task->port, 0), 0, \
137 msgport ? (rpc_expr) : EIEIO)
139 /* Like INF_MSGPORT_RPC, but will also resume the signal thread to ensure
140 there's someone around to deal with the RPC (and resuspend things
141 afterwards). This effects INF's threads' resume_sc count. */
142 #define INF_RESUME_MSGPORT_RPC(inf, rpc_expr) \
143 (inf_set_threads_resume_sc_for_signal_thread (inf) \
146 __e = INF_MSGPORT_RPC (inf, rpc_expr); \
151 #define MIG_SERVER_DIED EMIG_SERVER_DIED /* XXX */
153 /* The state passed by an exception message. */
156 int exception; /* The exception code */
158 mach_port_t handler; /* The real exception port to handle this. */
159 mach_port_t reply; /* The reply port from the exception call. */
162 /* The results of the last wait an inf did. */
165 struct target_waitstatus status; /* The status returned to gdb. */
166 struct exc_state exc; /* The exception that caused us to return. */
167 struct proc *thread; /* The thread in question. */
168 int suppress; /* Something trivial happened. */
171 /* The state of an inferior. */
174 /* Fields describing the current inferior. */
176 struct proc *task; /* The mach task. */
177 struct proc *threads; /* A linked list of all threads in TASK. */
179 /* True if THREADS needn't be validated by querying the task. We assume that
180 we and the task in question are the only ones frobbing the thread list,
181 so as long as we don't let any code run, we don't have to worry about
183 int threads_up_to_date;
185 pid_t pid; /* The real system PID. */
187 struct inf_wait wait; /* What to return from target_wait. */
189 /* One thread proc in INF may be in `single-stepping mode'. This is it. */
190 struct proc *step_thread;
192 /* The thread we think is the signal thread. */
193 struct proc *signal_thread;
195 mach_port_t event_port; /* Where we receive various msgs. */
197 /* True if we think at least one thread in the inferior could currently be
199 unsigned int running:1;
201 /* True if the process has stopped (in the proc server sense). Note that
202 since a proc server `stop' leaves the signal thread running, the inf can
203 be RUNNING && STOPPED... */
204 unsigned int stopped:1;
206 /* True if the inferior has no message port. */
207 unsigned int nomsg:1;
209 /* True if the inferior is traced. */
210 unsigned int traced:1;
212 /* True if we shouldn't try waiting for the inferior, usually because we
213 can't for some reason. */
214 unsigned int no_wait:1;
216 /* When starting a new inferior, we don't try to validate threads until all
217 the proper execs have been done. This is a count of how many execs we
219 unsigned pending_execs;
221 /* Fields describing global state */
223 /* The task suspend count used when gdb has control. This is normally 1 to
224 make things easier for us, but sometimes (like when attaching to vital
225 system servers) it may be desirable to let the task continue to run
226 (pausing individual threads as necessary). */
229 /* The task suspend count left when detaching from a task. */
232 /* The initial values used for the run_sc and pause_sc of newly discovered
233 threads -- see the definition of those fields in struct proc. */
234 int default_thread_run_sc;
235 int default_thread_pause_sc;
236 int default_thread_detach_sc;
238 /* True if the process should be traced when started/attached. Newly
239 started processes *must* be traced at first to exec them properly, but
240 if this is false, tracing is turned off as soon it has done so. */
243 /* True if exceptions from the inferior process should be trapped. This
244 must be on to use breakpoints. */
250 __proc_pid (struct proc *proc)
252 return proc->inf->pid;
255 /* Update PROC's real suspend count to match it's desired one. Returns true
256 if we think PROC is now in a runnable state. */
258 proc_update_sc (struct proc *proc)
262 int delta = proc->sc - proc->cur_sc;
265 proc_debug (proc, "sc: %d --> %d", proc->cur_sc, proc->sc);
267 if (proc->sc == 0 && proc->state_changed)
268 /* Since PROC may start running, we must write back any state changes. */
270 assert (proc_is_thread (proc));
271 proc_debug (proc, "storing back changed thread state");
272 err = thread_set_state (proc->port, THREAD_STATE_FLAVOR,
273 (thread_state_t) & proc->state, THREAD_STATE_SIZE);
275 proc->state_changed = 0;
279 while (delta-- > 0 && !err)
280 if (proc_is_task (proc))
281 err = task_suspend (proc->port);
283 err = thread_suspend (proc->port);
285 while (delta++ < 0 && !err)
286 if (proc_is_task (proc))
287 err = task_resume (proc->port);
289 err = thread_resume (proc->port);
292 proc->cur_sc = proc->sc;
294 /* If we got an error, then the task/thread has disappeared. */
295 running = !err && proc->sc == 0;
297 proc_debug (proc, "is %s", err ? "dead" : running ? "running" : "suspended");
299 proc_debug (proc, "err = %s", strerror (err));
304 proc->state_valid = proc->state_changed = 0;
305 proc->fetched_regs = 0;
311 /* Thread_abort is called on PROC if needed. PROC must be a thread proc.
312 If PROC is deemed `precious', then nothing is done unless FORCE is true.
313 In particular, a thread is precious if it's running (in which case forcing
314 it includes suspending it first), or if it has an exception pending. */
316 proc_abort (struct proc *proc, int force)
318 assert (proc_is_thread (proc));
322 struct inf *inf = proc->inf;
323 int running = (proc->cur_sc == 0 && inf->task->cur_sc == 0);
325 if (running && force)
328 inf_update_suspends (proc->inf);
330 warning ("Stopped %s.", proc_string (proc));
332 else if (proc == inf->wait.thread && inf->wait.exc.reply && !force)
333 /* An exception is pending on PROC, which don't mess with. */
337 /* We only abort the thread if it's not actually running. */
339 thread_abort (proc->port);
340 proc_debug (proc, "aborted");
344 proc_debug (proc, "not aborting");
348 /* Make sure that the state field in PROC is up to date, and return a pointer
349 to it, or 0 if something is wrong. If WILL_MODIFY is true, makes sure
350 that the thread is stopped and aborted first, and sets the state_changed
351 field in PROC to true. */
353 proc_get_state (struct proc *proc, int will_modify)
355 int was_aborted = proc->aborted;
357 proc_debug (proc, "updating state info%s",
358 will_modify ? " (with intention to modify)" : "");
360 proc_abort (proc, will_modify);
362 if (!was_aborted && proc->aborted)
363 /* PROC's state may have changed since we last fetched it. */
364 proc->state_valid = 0;
366 if (!proc->state_valid)
368 mach_msg_type_number_t state_size = THREAD_STATE_SIZE;
370 thread_get_state (proc->port, THREAD_STATE_FLAVOR,
371 (thread_state_t) & proc->state, &state_size);
372 proc_debug (proc, "getting thread state");
373 proc->state_valid = !err;
376 if (proc->state_valid)
379 proc->state_changed = 1;
380 return (thread_state_t) & proc->state;
386 /* Set PORT to PROC's exception port. */
388 proc_get_exception_port (struct proc * proc, mach_port_t * port)
390 if (proc_is_task (proc))
391 return task_get_exception_port (proc->port, port);
393 return thread_get_exception_port (proc->port, port);
396 /* Set PROC's exception port to PORT. */
398 proc_set_exception_port (struct proc * proc, mach_port_t port)
400 proc_debug (proc, "setting exception port: %d", port);
401 if (proc_is_task (proc))
402 return task_set_exception_port (proc->port, port);
404 return thread_set_exception_port (proc->port, port);
407 /* Get PROC's exception port, cleaning up a bit if proc has died. */
409 _proc_get_exc_port (struct proc *proc)
411 mach_port_t exc_port;
412 error_t err = proc_get_exception_port (proc, &exc_port);
415 /* PROC must be dead. */
418 mach_port_deallocate (mach_task_self (), proc->exc_port);
419 proc->exc_port = MACH_PORT_NULL;
420 if (proc->saved_exc_port)
421 mach_port_deallocate (mach_task_self (), proc->saved_exc_port);
422 proc->saved_exc_port = MACH_PORT_NULL;
428 /* Replace PROC's exception port with EXC_PORT, unless it's already been
429 done. Stash away any existing exception port so we can restore it later. */
431 proc_steal_exc_port (struct proc *proc, mach_port_t exc_port)
433 mach_port_t cur_exc_port = _proc_get_exc_port (proc);
439 proc_debug (proc, "inserting exception port: %d", exc_port);
441 if (cur_exc_port != exc_port)
442 /* Put in our exception port. */
443 err = proc_set_exception_port (proc, exc_port);
445 if (err || cur_exc_port == proc->exc_port)
446 /* We previously set the exception port, and it's still set. So we
447 just keep the old saved port which is what the proc set. */
450 mach_port_deallocate (mach_task_self (), cur_exc_port);
453 /* Keep a copy of PROC's old exception port so it can be restored. */
455 if (proc->saved_exc_port)
456 mach_port_deallocate (mach_task_self (), proc->saved_exc_port);
457 proc->saved_exc_port = cur_exc_port;
460 proc_debug (proc, "saved exception port: %d", proc->saved_exc_port);
463 proc->exc_port = exc_port;
465 warning ("Error setting exception port for %s: %s",
466 proc_string (proc), strerror (err));
470 /* If we previously replaced PROC's exception port, put back what we
471 found there at the time, unless *our* exception port has since been
472 overwritten, in which case who knows what's going on. */
474 proc_restore_exc_port (struct proc *proc)
476 mach_port_t cur_exc_port = _proc_get_exc_port (proc);
482 proc_debug (proc, "restoring real exception port");
484 if (proc->exc_port == cur_exc_port)
485 /* Our's is still there. */
486 err = proc_set_exception_port (proc, proc->saved_exc_port);
488 if (proc->saved_exc_port)
489 mach_port_deallocate (mach_task_self (), proc->saved_exc_port);
490 proc->saved_exc_port = MACH_PORT_NULL;
493 proc->exc_port = MACH_PORT_NULL;
495 warning ("Error setting exception port for %s: %s",
496 proc_string (proc), strerror (err));
500 /* Turns hardware tracing in PROC on or off when SET is true or false,
501 respectively. Returns true on success. */
503 proc_trace (struct proc *proc, int set)
505 thread_state_t state = proc_get_state (proc, 1);
508 return 0; /* the thread must be dead. */
510 proc_debug (proc, "tracing %s", set ? "on" : "off");
514 /* XXX We don't get the exception unless the thread has its own
515 exception port???? */
516 if (proc->exc_port == MACH_PORT_NULL)
517 proc_steal_exc_port (proc, proc->inf->event_port);
518 THREAD_STATE_SET_TRACED (state);
521 THREAD_STATE_CLEAR_TRACED (state);
526 /* A variable from which to assign new TIDs. */
527 static int next_thread_id = 1;
529 /* Returns a new proc structure with the given fields. Also adds a
530 notification for PORT becoming dead to be sent to INF's notify port. */
532 make_proc (struct inf *inf, mach_port_t port, int tid)
535 mach_port_t prev_port = MACH_PORT_NULL;
536 struct proc *proc = malloc (sizeof (struct proc));
542 proc->saved_exc_port = MACH_PORT_NULL;
543 proc->exc_port = MACH_PORT_NULL;
548 /* Note that these are all the values for threads; the task simply uses the
549 corresponding field in INF directly. */
550 proc->run_sc = inf->default_thread_run_sc;
551 proc->pause_sc = inf->default_thread_pause_sc;
552 proc->detach_sc = inf->default_thread_detach_sc;
553 proc->resume_sc = proc->run_sc;
557 proc->state_valid = 0;
558 proc->state_changed = 0;
560 proc_debug (proc, "is new");
562 /* Get notified when things die. */
564 mach_port_request_notification (mach_task_self (), port,
565 MACH_NOTIFY_DEAD_NAME, 1,
567 MACH_MSG_TYPE_MAKE_SEND_ONCE,
570 warning ("Couldn't request notification for port %d: %s",
571 port, strerror (err));
574 proc_debug (proc, "notifications to: %d", inf->event_port);
575 if (prev_port != MACH_PORT_NULL)
576 mach_port_deallocate (mach_task_self (), prev_port);
579 if (inf->want_exceptions)
580 if (proc_is_task (proc))
581 /* Make the task exception port point to us. */
582 proc_steal_exc_port (proc, inf->event_port);
584 /* Just clear thread exception ports -- they default to the task one. */
585 proc_steal_exc_port (proc, MACH_PORT_NULL);
590 /* Frees PROC and any resources it uses, and returns the value of PROC's
593 _proc_free (struct proc *proc)
595 struct inf *inf = proc->inf;
596 struct proc *next = proc->next;
598 proc_debug (proc, "freeing...");
600 if (proc == inf->step_thread)
601 /* Turn off single stepping. */
602 inf_set_step_thread (inf, 0);
603 if (proc == inf->wait.thread)
604 inf_clear_wait (inf);
605 if (proc == inf->signal_thread)
606 inf->signal_thread = 0;
608 if (proc->port != MACH_PORT_NULL)
610 if (proc->exc_port != MACH_PORT_NULL)
611 /* Restore the original exception port. */
612 proc_restore_exc_port (proc);
613 if (proc->cur_sc != 0)
614 /* Resume the thread/task. */
617 proc_update_sc (proc);
619 mach_port_deallocate (mach_task_self (), proc->port);
629 struct inf *inf = malloc (sizeof (struct inf));
636 inf->threads_up_to_date = 0;
638 inf->wait.status.kind = TARGET_WAITKIND_SPURIOUS;
639 inf->wait.thread = 0;
640 inf->wait.exc.handler = MACH_PORT_NULL;
641 inf->wait.exc.reply = MACH_PORT_NULL;
642 inf->step_thread = 0;
643 inf->signal_thread = 0;
644 inf->event_port = MACH_PORT_NULL;
650 inf->pending_execs = 0;
653 inf->default_thread_run_sc = 0;
654 inf->default_thread_pause_sc = 0;
655 inf->default_thread_detach_sc = 0;
656 inf->want_signals = 1; /* By default */
657 inf->want_exceptions = 1; /* By default */
662 /* clear INF's target wait status. */
664 inf_clear_wait (struct inf *inf)
666 inf_debug (inf, "clearing wait");
667 inf->wait.status.kind = TARGET_WAITKIND_SPURIOUS;
668 inf->wait.thread = 0;
669 inf->wait.suppress = 0;
670 if (inf->wait.exc.handler != MACH_PORT_NULL)
672 mach_port_deallocate (mach_task_self (), inf->wait.exc.handler);
673 inf->wait.exc.handler = MACH_PORT_NULL;
675 if (inf->wait.exc.reply != MACH_PORT_NULL)
677 mach_port_deallocate (mach_task_self (), inf->wait.exc.reply);
678 inf->wait.exc.reply = MACH_PORT_NULL;
683 inf_cleanup (struct inf *inf)
685 inf_debug (inf, "cleanup");
687 inf_clear_wait (inf);
689 inf_set_pid (inf, -1);
696 inf->pending_execs = 0;
700 mach_port_destroy (mach_task_self (), inf->event_port);
701 inf->event_port = MACH_PORT_NULL;
706 inf_startup (struct inf *inf, int pid)
710 inf_debug (inf, "startup: pid = %d", pid);
714 /* Make the port on which we receive all events. */
715 err = mach_port_allocate (mach_task_self (),
716 MACH_PORT_RIGHT_RECEIVE, &inf->event_port);
718 error ("Error allocating event port: %s", strerror (err));
720 /* Make a send right for it, so we can easily copy it for other people. */
721 mach_port_insert_right (mach_task_self (), inf->event_port,
722 inf->event_port, MACH_MSG_TYPE_MAKE_SEND);
723 inf_set_pid (inf, pid);
726 /* close current process, if any, and attach INF to process PORT */
728 inf_set_pid (struct inf *inf, pid_t pid)
731 struct proc *task = inf->task;
733 inf_debug (inf, "setting pid: %d", pid);
736 task_port = MACH_PORT_NULL;
739 error_t err = proc_pid2task (proc_server, pid, &task_port);
741 error ("Error getting task for pid %d: %s", pid, strerror (err));
744 inf_debug (inf, "setting task: %d", task_port);
747 task_suspend (task_port);
749 if (task && task->port != task_port)
752 inf_validate_procs (inf); /* Trash all the threads. */
753 _proc_free (task); /* And the task. */
756 if (task_port != MACH_PORT_NULL)
758 inf->task = make_proc (inf, task_port, PROC_TID_TASK);
759 inf->threads_up_to_date = 0;
766 inf->task->sc = inf->task->cur_sc = 1; /* Reflect task_suspend above */
772 /* Validates INF's stopped, nomsg and traced field from the actual
773 proc server state. Note that the traced field is only updated from
774 the proc server state if we do not have a message port. If we do
775 have a message port we'd better look at the tracemask itself. */
777 inf_validate_procinfo (struct inf *inf)
780 mach_msg_type_number_t noise_len = 0;
782 mach_msg_type_number_t pi_len = 0;
785 proc_getprocinfo (proc_server, inf->pid, &info_flags,
786 (procinfo_t *) & pi, &pi_len, &noise, &noise_len);
790 inf->stopped = !!(pi->state & PI_STOPPED);
791 inf->nomsg = !!(pi->state & PI_NOMSG);
793 inf->traced = !!(pi->state & PI_TRACED);
794 vm_deallocate (mach_task_self (), (vm_address_t) pi, pi_len);
796 vm_deallocate (mach_task_self (), (vm_address_t) noise, noise_len);
800 /* Validates INF's task suspend count. If it's higher than we expect, verify
801 with the user before `stealing' the extra count. */
803 inf_validate_task_sc (struct inf *inf)
805 struct task_basic_info info;
806 mach_msg_type_number_t info_len = TASK_BASIC_INFO_COUNT;
808 task_info (inf->task->port, TASK_BASIC_INFO, (task_info_t) & info, &info_len);
811 inf->task->dead = 1; /* oh well */
812 else if (inf->task->cur_sc < info.suspend_count)
816 target_terminal_ours (); /* Allow I/O. */
818 !query ("Pid %d has an additional task suspend count of %d; clear it? ",
819 inf->pid, info.suspend_count - inf->task->cur_sc);
820 target_terminal_inferior (); /* Give it back to the child. */
823 error ("Additional task suspend count left untouched.");
825 inf->task->cur_sc = info.suspend_count;
829 /* Turns tracing for INF on or off, depending on ON, unless it already is.
830 If INF is running, the resume_sc count of INF's threads will be modified,
831 and the signal thread will briefly be run to change the trace state. */
833 inf_set_traced (struct inf *inf, int on)
835 if (on != inf->traced)
836 if (inf->task && !inf->task->dead)
837 /* Make it take effect immediately. */
839 sigset_t mask = on ? ~(sigset_t) 0 : 0;
841 INF_RESUME_MSGPORT_RPC (inf, msg_set_init_int (msgport, refport,
842 INIT_TRACEMASK, mask));
846 warning ("Can't modify tracing state for pid %d: No signal thread",
851 warning ("Can't modify tracing state for pid %d: %s",
852 inf->pid, strerror (err));
860 /* Makes all the real suspend count deltas of all the procs in INF match the
861 desired values. Careful to always do thread/task suspend counts in the
862 safe order. Returns true if at least one thread is thought to be running. */
864 inf_update_suspends (struct inf *inf)
866 struct proc *task = inf->task;
867 /* We don't have to update INF->threads even though we're iterating over it
868 because we'll change a thread only if it already has an existing proc
871 inf_debug (inf, "updating suspend counts");
876 int task_running = (task->sc == 0), thread_running = 0;
878 if (task->sc > task->cur_sc)
879 /* The task is becoming _more_ suspended; do before any threads. */
880 task_running = proc_update_sc (task);
882 if (inf->pending_execs)
883 /* When we're waiting for an exec, things may be happening behind our
884 back, so be conservative. */
887 /* Do all the thread suspend counts. */
888 for (thread = inf->threads; thread; thread = thread->next)
889 thread_running |= proc_update_sc (thread);
891 if (task->sc != task->cur_sc)
892 /* We didn't do the task first, because we wanted to wait for the
893 threads; do it now. */
894 task_running = proc_update_sc (task);
896 inf_debug (inf, "%srunning...",
897 (thread_running && task_running) ? "" : "not ");
899 inf->running = thread_running && task_running;
901 /* Once any thread has executed some code, we can't depend on the
902 threads list any more. */
904 inf->threads_up_to_date = 0;
912 /* Converts a GDB pid to a struct proc. */
914 inf_tid_to_thread (struct inf *inf, int tid)
916 struct proc *thread = inf->threads;
919 if (thread->tid == tid)
922 thread = thread->next;
926 /* Converts a thread port to a struct proc. */
928 inf_port_to_thread (struct inf *inf, mach_port_t port)
930 struct proc *thread = inf->threads;
932 if (thread->port == port)
935 thread = thread->next;
939 /* Make INF's list of threads be consistent with reality of TASK. */
941 inf_validate_procs (struct inf *inf)
944 thread_array_t threads;
945 unsigned num_threads;
946 struct proc *task = inf->task;
948 /* If no threads are currently running, this function will guarantee that
949 things are up to date. The exception is if there are zero threads --
950 then it is almost certainly in an odd state, and probably some outside
951 agent will create threads. */
952 inf->threads_up_to_date = inf->threads ? !inf->running : 0;
956 error_t err = task_threads (task->port, &threads, &num_threads);
957 inf_debug (inf, "fetching threads");
959 /* TASK must be dead. */
969 inf_debug (inf, "no task");
973 unsigned search_start = 0; /* Make things normally linear. */
974 /* Which thread in PROCS corresponds to each task thread, & the task. */
975 struct proc *matched[num_threads + 1];
976 /* The last thread in INF->threads, so we can add to the end. */
977 struct proc *last = 0;
978 /* The current thread we're considering. */
979 struct proc *thread = inf->threads;
981 bzero (matched, sizeof (matched));
987 for (i = search_start, left = num_threads; left; i++, left--)
989 if (i >= num_threads)
990 i -= num_threads; /* I wrapped around. */
991 if (thread->port == threads[i])
992 /* We already know about this thread. */
996 thread = thread->next;
1004 proc_debug (thread, "died!");
1005 thread->port = MACH_PORT_NULL;
1006 thread = _proc_free (thread); /* THREAD is dead. */
1007 (last ? last->next : inf->threads) = thread;
1011 for (i = 0; i < num_threads; i++)
1013 /* Throw away the duplicate send right. */
1014 mach_port_deallocate (mach_task_self (), threads[i]);
1016 /* THREADS[I] is a thread we don't know about yet! */
1018 thread = make_proc (inf, threads[i], next_thread_id++);
1019 (last ? last->next : inf->threads) = thread;
1021 proc_debug (thread, "new thread: %d", threads[i]);
1022 add_thread (thread->tid); /* Tell GDB's generic thread code. */
1025 vm_deallocate (mach_task_self (),
1026 (vm_address_t) threads, (num_threads * sizeof (thread_t)));
1030 /* Makes sure that INF's thread list is synced with the actual process. */
1032 inf_update_procs (struct inf *inf)
1036 if (!inf->threads_up_to_date)
1037 inf_validate_procs (inf);
1041 /* Sets the resume_sc of each thread in inf. That of RUN_THREAD is set to 0,
1042 and others are set to their run_sc if RUN_OTHERS is true, and otherwise
1045 inf_set_threads_resume_sc (struct inf *inf,
1046 struct proc *run_thread, int run_others)
1048 struct proc *thread;
1049 inf_update_procs (inf);
1050 for (thread = inf->threads; thread; thread = thread->next)
1051 if (thread == run_thread)
1052 thread->resume_sc = 0;
1053 else if (run_others)
1054 thread->resume_sc = thread->run_sc;
1056 thread->resume_sc = thread->pause_sc;
1059 /* Cause INF to continue execution immediately; individual threads may still
1060 be suspended (but their suspend counts will be updated). */
1062 inf_resume (struct inf *inf)
1064 struct proc *thread;
1066 inf_update_procs (inf);
1068 for (thread = inf->threads; thread; thread = thread->next)
1069 thread->sc = thread->resume_sc;
1073 if (!inf->pending_execs)
1074 /* Try to make sure our task count is correct -- in the case where
1075 we're waiting for an exec though, things are too volatile, so just
1076 assume things will be reasonable (which they usually will be). */
1077 inf_validate_task_sc (inf);
1081 inf_update_suspends (inf);
1084 /* Cause INF to stop execution immediately; individual threads may still
1087 inf_suspend (struct inf *inf)
1089 struct proc *thread;
1091 inf_update_procs (inf);
1093 for (thread = inf->threads; thread; thread = thread->next)
1094 thread->sc = thread->pause_sc;
1097 inf->task->sc = inf->pause_sc;
1099 inf_update_suspends (inf);
1102 /* INF has one thread PROC that is in single-stepping mode. This function
1103 changes it to be PROC, changing any old step_thread to be a normal one. A
1104 PROC of 0 clears any existing value. */
1106 inf_set_step_thread (struct inf *inf, struct proc *thread)
1108 assert (!thread || proc_is_thread (thread));
1111 inf_debug (inf, "setting step thread: %d/%d", inf->pid, thread->tid);
1113 inf_debug (inf, "clearing step thread");
1115 if (inf->step_thread != thread)
1117 if (inf->step_thread && inf->step_thread->port != MACH_PORT_NULL)
1118 if (!proc_trace (inf->step_thread, 0))
1120 if (thread && proc_trace (thread, 1))
1121 inf->step_thread = thread;
1123 inf->step_thread = 0;
1127 /* Set up the thread resume_sc's so that only the signal thread is running
1128 (plus whatever other thread are set to always run). Returns true if we
1129 did so, or false if we can't find a signal thread. */
1131 inf_set_threads_resume_sc_for_signal_thread (struct inf *inf)
1133 if (inf->signal_thread)
1135 inf_set_threads_resume_sc (inf, inf->signal_thread, 0);
1143 inf_update_signal_thread (struct inf *inf)
1145 /* XXX for now we assume that if there's a msgport, the 2nd thread is
1146 the signal thread. */
1147 inf->signal_thread = inf->threads ? inf->threads->next : 0;
1150 /* Detachs from INF's inferior task, letting it run once again... */
1152 inf_detach (struct inf *inf)
1154 struct proc *task = inf->task;
1156 inf_debug (inf, "detaching...");
1158 inf_clear_wait (inf);
1159 inf_set_step_thread (inf, 0);
1163 struct proc *thread;
1165 inf_validate_procinfo (inf);
1167 inf_set_traced (inf, 0);
1173 inf_signal (inf, TARGET_SIGNAL_0);
1176 proc_restore_exc_port (task);
1177 task->sc = inf->detach_sc;
1179 for (thread = inf->threads; thread; thread = thread->next)
1181 proc_restore_exc_port (thread);
1182 thread->sc = thread->detach_sc;
1185 inf_update_suspends (inf);
1191 /* Attaches INF to the process with process id PID, returning it in a suspended
1192 state suitable for debugging. */
1194 inf_attach (struct inf *inf, int pid)
1196 inf_debug (inf, "attaching: %d", pid);
1201 inf_startup (inf, pid);
1204 /* Makes sure that we've got our exception ports entrenched in the process. */
1206 inf_steal_exc_ports (struct inf *inf)
1208 struct proc *thread;
1210 inf_debug (inf, "stealing exception ports");
1212 inf_set_step_thread (inf, 0); /* The step thread is special. */
1214 proc_steal_exc_port (inf->task, inf->event_port);
1215 for (thread = inf->threads; thread; thread = thread->next)
1216 proc_steal_exc_port (thread, MACH_PORT_NULL);
1219 /* Makes sure the process has its own exception ports. */
1221 inf_restore_exc_ports (struct inf *inf)
1223 struct proc *thread;
1225 inf_debug (inf, "restoring exception ports");
1227 inf_set_step_thread (inf, 0); /* The step thread is special. */
1229 proc_restore_exc_port (inf->task);
1230 for (thread = inf->threads; thread; thread = thread->next)
1231 proc_restore_exc_port (thread);
1234 /* Deliver signal SIG to INF. If INF is stopped, delivering a signal, even
1235 signal 0, will continue it. INF is assumed to be in a paused state, and
1236 the resume_sc's of INF's threads may be affected. */
1238 inf_signal (struct inf *inf, enum target_signal sig)
1241 int host_sig = target_signal_to_host (sig);
1243 #define NAME target_signal_to_name (sig)
1245 if (host_sig >= _NSIG)
1246 /* A mach exception. Exceptions are encoded in the signal space by
1247 putting them after _NSIG; this assumes they're positive (and not
1248 extremely large)! */
1250 struct inf_wait *w = &inf->wait;
1251 if (w->status.kind == TARGET_WAITKIND_STOPPED
1252 && w->status.value.sig == sig
1253 && w->thread && !w->thread->aborted)
1254 /* We're passing through the last exception we received. This is
1255 kind of bogus, because exceptions are per-thread whereas gdb
1256 treats signals as per-process. We just forward the exception to
1257 the correct handler, even it's not for the same thread as TID --
1258 i.e., we pretend it's global. */
1260 struct exc_state *e = &w->exc;
1261 inf_debug (inf, "passing through exception:"
1262 " task = %d, thread = %d, exc = %d"
1263 ", code = %d, subcode = %d",
1264 w->thread->port, inf->task->port,
1265 e->exception, e->code, e->subcode);
1267 exception_raise_request (e->handler,
1268 e->reply, MACH_MSG_TYPE_MOVE_SEND_ONCE,
1269 w->thread->port, inf->task->port,
1270 e->exception, e->code, e->subcode);
1273 error ("Can't forward spontaneous exception (%s).", NAME);
1276 /* A Unix signal. */
1278 /* The process is stopped and expecting a signal. Just send off a
1279 request and let it get handled when we resume everything. */
1281 inf_debug (inf, "sending %s to stopped process", NAME);
1283 INF_MSGPORT_RPC (inf,
1284 msg_sig_post_untraced_request (msgport,
1286 MACH_MSG_TYPE_MAKE_SEND_ONCE,
1290 /* Posting an untraced signal automatically continues it.
1291 We clear this here rather than when we get the reply
1292 because we'd rather assume it's not stopped when it
1293 actually is, than the reverse. */
1297 /* It's not expecting it. We have to let just the signal thread
1298 run, and wait for it to get into a reasonable state before we
1299 can continue the rest of the process. When we finally resume the
1300 process the signal we request will be the very first thing that
1303 inf_debug (inf, "sending %s to unstopped process (so resuming signal thread)", NAME);
1305 INF_RESUME_MSGPORT_RPC (inf, msg_sig_post_untraced (msgport,
1306 host_sig, 0, refport));
1310 /* Can't do too much... */
1311 warning ("Can't deliver signal %s: No signal thread.", NAME);
1313 warning ("Delivering signal %s: %s", NAME, strerror (err));
1318 /* Continue INF without delivering a signal. This is meant to be used
1319 when INF does not have a message port. */
1321 inf_continue (struct inf *inf)
1324 error_t err = proc_pid2proc (proc_server, inf->pid, &proc);
1328 inf_debug (inf, "continuing process");
1330 err = proc_mark_cont (proc);
1333 struct proc *thread;
1335 for (thread = inf->threads; thread; thread = thread->next)
1336 thread_resume (thread->port);
1343 warning ("Can't continue process: %s", strerror (err));
1346 /* The inferior used for all gdb target ops. */
1347 struct inf *current_inferior = 0;
1349 /* The inferior being waited for by gnu_wait. Since GDB is decidely not
1350 multi-threaded, we don't bother to lock this. */
1351 struct inf *waiting_inf;
1353 /* Wait for something to happen in the inferior, returning what in STATUS. */
1355 gnu_wait (int tid, struct target_waitstatus *status)
1359 mach_msg_header_t hdr;
1360 mach_msg_type_t type;
1365 struct proc *thread;
1366 struct inf *inf = current_inferior;
1370 if (!inf->threads && !inf->pending_execs)
1371 /* No threads! Assume that maybe some outside agency is frobbing our
1372 task, and really look for new threads. If we can't find any, just tell
1373 the user to try again later. */
1375 inf_validate_procs (inf);
1376 if (!inf->threads && !inf->task->dead)
1377 error ("There are no threads; try again later.");
1382 inf_debug (inf, "waiting for: %d", tid);
1385 if (proc_wait_pid != inf->pid && !inf->no_wait)
1386 /* Always get information on events from the proc server. */
1388 inf_debug (inf, "requesting wait on pid %d", inf->pid);
1391 /* The proc server is single-threaded, and only allows a single
1392 outstanding wait request, so we have to cancel the previous one. */
1394 inf_debug (inf, "cancelling previous wait on pid %d", proc_wait_pid);
1395 interrupt_operation (proc_server, 0);
1399 proc_wait_request (proc_server, inf->event_port, inf->pid, WUNTRACED);
1401 warning ("wait request failed: %s", strerror (err));
1404 inf_debug (inf, "waits pending: %d", proc_waits_pending);
1405 proc_wait_pid = inf->pid;
1406 /* Even if proc_waits_pending was > 0 before, we still won't get
1407 any other replies, because it was either from a different INF,
1408 or a different process attached to INF -- and the event port,
1409 which is the wait reply port, changes when you switch processes. */
1410 proc_waits_pending = 1;
1414 inf_clear_wait (inf);
1416 /* What can happen? (1) Dead name notification; (2) Exceptions arrive;
1417 (3) wait reply from the proc server. */
1419 inf_debug (inf, "waiting for an event...");
1420 err = mach_msg (&msg.hdr, MACH_RCV_MSG | MACH_RCV_INTERRUPT,
1421 0, sizeof (struct msg), inf->event_port,
1422 MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
1424 /* Re-suspend the task. */
1427 if (!inf->task && inf->pending_execs)
1428 /* When doing an exec, it's possible that the old task wasn't reused
1429 (e.g., setuid execs). So if the task seems to have disappeared,
1430 attempt to refetch it, as the pid should still be the same. */
1431 inf_set_pid (inf, inf->pid);
1433 if (err == EMACH_RCV_INTERRUPTED)
1434 inf_debug (inf, "interrupted");
1436 error ("Couldn't wait for an event: %s", strerror (err));
1441 mach_msg_header_t hdr;
1442 mach_msg_type_t err_type;
1448 inf_debug (inf, "event: msgid = %d", msg.hdr.msgh_id);
1450 /* Handle what we got. */
1451 if (!notify_server (&msg.hdr, &reply.hdr)
1452 && !exc_server (&msg.hdr, &reply.hdr)
1453 && !process_reply_server (&msg.hdr, &reply.hdr)
1454 && !msg_reply_server (&msg.hdr, &reply.hdr))
1455 /* Whatever it is, it's something strange. */
1456 error ("Got a strange event, msg id = %d.", msg.hdr.msgh_id);
1459 error ("Handling event, msgid = %d: %s",
1460 msg.hdr.msgh_id, strerror (reply.err));
1463 if (inf->pending_execs)
1464 /* We're waiting for the inferior to finish execing. */
1466 struct inf_wait *w = &inf->wait;
1467 enum target_waitkind kind = w->status.kind;
1469 if (kind == TARGET_WAITKIND_SPURIOUS)
1470 /* Since gdb is actually counting the number of times the inferior
1471 stops, expecting one stop per exec, we only return major events
1475 inf_debug (inf, "pending_execs = %d, ignoring minor event",
1476 inf->pending_execs);
1478 else if (kind == TARGET_WAITKIND_STOPPED
1479 && w->status.value.sig == TARGET_SIGNAL_TRAP)
1480 /* Ah hah! A SIGTRAP from the inferior while starting up probably
1481 means we've succesfully completed an exec! */
1483 if (--inf->pending_execs == 0)
1486 #if 0 /* do we need this? */
1487 prune_threads (1); /* Get rid of the old shell threads */
1488 renumber_threads (0); /* Give our threads reasonable names. */
1491 inf_debug (inf, "pending exec completed, pending_execs => %d",
1492 inf->pending_execs);
1494 else if (kind == TARGET_WAITKIND_STOPPED)
1495 /* It's possible that this signal is because of a crashed process
1496 being handled by the hurd crash server; in this case, the process
1497 will have an extra task suspend, which we need to know about.
1498 Since the code in inf_resume that normally checks for this is
1499 disabled while INF->pending_execs, we do the check here instead. */
1500 inf_validate_task_sc (inf);
1503 if (inf->wait.suppress)
1504 /* Some totally spurious event happened that we don't consider
1505 worth returning to gdb. Just keep waiting. */
1507 inf_debug (inf, "suppressing return, rewaiting...");
1512 /* Pass back out our results. */
1513 bcopy (&inf->wait.status, status, sizeof (*status));
1515 thread = inf->wait.thread;
1519 thread = inf_tid_to_thread (inf, tid);
1521 if (!thread || thread->port == MACH_PORT_NULL)
1522 /* TID is dead; try and find a new thread. */
1523 if (inf_update_procs (inf) && inf->threads)
1524 tid = inf->threads->tid; /* The first available thread. */
1526 tid = inferior_pid; /* let wait_for_inferior handle exit case */
1528 if (thread && tid >= 0 && status->kind != TARGET_WAITKIND_SPURIOUS
1529 && inf->pause_sc == 0 && thread->pause_sc == 0)
1530 /* If something actually happened to THREAD, make sure we suspend it. */
1533 inf_update_suspends (inf);
1536 inf_debug (inf, "returning tid = %d, status = %s (%d)", tid,
1537 status->kind == TARGET_WAITKIND_EXITED ? "EXITED"
1538 : status->kind == TARGET_WAITKIND_STOPPED ? "STOPPED"
1539 : status->kind == TARGET_WAITKIND_SIGNALLED ? "SIGNALLED"
1540 : status->kind == TARGET_WAITKIND_LOADED ? "LOADED"
1541 : status->kind == TARGET_WAITKIND_SPURIOUS ? "SPURIOUS"
1543 status->value.integer);
1548 /* The rpc handler called by exc_server. */
1550 S_exception_raise_request (mach_port_t port, mach_port_t reply_port,
1551 thread_t thread_port, task_t task_port,
1552 int exception, int code, int subcode)
1554 struct inf *inf = waiting_inf;
1555 struct proc *thread = inf_port_to_thread (inf, thread_port);
1557 inf_debug (waiting_inf,
1558 "thread = %d, task = %d, exc = %d, code = %d, subcode = %d",
1559 thread_port, task_port, exception, code);
1562 /* We don't know about thread? */
1564 inf_update_procs (inf);
1565 thread = inf_port_to_thread (inf, thread_port);
1567 /* Give up, the generating thread is gone. */
1571 mach_port_deallocate (mach_task_self (), thread_port);
1572 mach_port_deallocate (mach_task_self (), task_port);
1574 if (!thread->aborted)
1575 /* THREAD hasn't been aborted since this exception happened (abortion
1576 clears any exception state), so it must be real. */
1578 /* Store away the details; this will destroy any previous info. */
1579 inf->wait.thread = thread;
1581 inf->wait.status.kind = TARGET_WAITKIND_STOPPED;
1583 if (exception == EXC_BREAKPOINT)
1584 /* GDB likes to get SIGTRAP for breakpoints. */
1586 inf->wait.status.value.sig = TARGET_SIGNAL_TRAP;
1587 mach_port_deallocate (mach_task_self (), reply_port);
1590 /* Record the exception so that we can forward it later. */
1592 if (thread->exc_port == port)
1594 inf_debug (waiting_inf, "Handler is thread exeption port <%d>",
1595 thread->saved_exc_port);
1596 inf->wait.exc.handler = thread->saved_exc_port;
1600 inf_debug (waiting_inf, "Handler is task exeption port <%d>",
1601 inf->task->saved_exc_port);
1602 inf->wait.exc.handler = inf->task->saved_exc_port;
1603 assert (inf->task->exc_port == port);
1605 if (inf->wait.exc.handler != MACH_PORT_NULL)
1606 /* Add a reference to the exception handler. */
1607 mach_port_mod_refs (mach_task_self (),
1608 inf->wait.exc.handler, MACH_PORT_RIGHT_SEND,
1611 inf->wait.exc.exception = exception;
1612 inf->wait.exc.code = code;
1613 inf->wait.exc.subcode = subcode;
1614 inf->wait.exc.reply = reply_port;
1616 /* Exceptions are encoded in the signal space by putting them after
1617 _NSIG; this assumes they're positive (and not extremely large)! */
1618 inf->wait.status.value.sig =
1619 target_signal_from_host (_NSIG + exception);
1623 /* A supppressed exception, which ignore. */
1625 inf->wait.suppress = 1;
1626 mach_port_deallocate (mach_task_self (), reply_port);
1632 /* Fill in INF's wait field after a task has died without giving us more
1633 detailed information. */
1635 inf_task_died_status (struct inf *inf)
1637 warning ("Pid %d died with unknown exit status, using SIGKILL.", inf->pid);
1638 inf->wait.status.kind = TARGET_WAITKIND_SIGNALLED;
1639 inf->wait.status.value.sig = TARGET_SIGNAL_KILL;
1642 /* Notify server routines. The only real one is dead name notification. */
1644 do_mach_notify_dead_name (mach_port_t notify, mach_port_t dead_port)
1646 struct inf *inf = waiting_inf;
1648 inf_debug (waiting_inf, "port = %d", dead_port);
1650 if (inf->task && inf->task->port == dead_port)
1652 proc_debug (inf->task, "is dead");
1653 inf->task->port = MACH_PORT_NULL;
1654 if (proc_wait_pid == inf->pid)
1655 /* We have a wait outstanding on the process, which will return more
1656 detailed information, so delay until we get that. */
1657 inf->wait.suppress = 1;
1659 /* We never waited for the process (maybe it wasn't a child), so just
1660 pretend it got a SIGKILL. */
1661 inf_task_died_status (inf);
1665 struct proc *thread = inf_port_to_thread (inf, dead_port);
1668 proc_debug (thread, "is dead");
1669 thread->port = MACH_PORT_NULL;
1673 mach_port_deallocate (mach_task_self (), dead_port);
1674 inf->threads_up_to_date = 0; /* Just in case */
1682 warning ("illegal rpc: %s", fun);
1687 do_mach_notify_no_senders (mach_port_t notify, mach_port_mscount_t count)
1689 return ill_rpc (__FUNCTION__);
1693 do_mach_notify_port_deleted (mach_port_t notify, mach_port_t name)
1695 return ill_rpc (__FUNCTION__);
1699 do_mach_notify_msg_accepted (mach_port_t notify, mach_port_t name)
1701 return ill_rpc (__FUNCTION__);
1705 do_mach_notify_port_destroyed (mach_port_t notify, mach_port_t name)
1707 return ill_rpc (__FUNCTION__);
1711 do_mach_notify_send_once (mach_port_t notify)
1713 return ill_rpc (__FUNCTION__);
1716 /* Process_reply server routines. We only use process_wait_reply. */
1719 S_proc_wait_reply (mach_port_t reply, error_t err,
1720 int status, int sigcode, rusage_t rusage, pid_t pid)
1722 struct inf *inf = waiting_inf;
1724 inf_debug (inf, "err = %s, pid = %d, status = 0x%x, sigcode = %d",
1725 err ? strerror (err) : "0", pid, status, sigcode);
1727 if (err && proc_wait_pid && (!inf->task || !inf->task->port))
1728 /* Ack. The task has died, but the task-died notification code didn't
1729 tell anyone because it thought a more detailed reply from the
1730 procserver was forthcoming. However, we now learn that won't
1731 happen... So we have to act like the task just died, and this time,
1733 inf_task_died_status (inf);
1735 if (--proc_waits_pending == 0)
1736 /* PROC_WAIT_PID represents the most recent wait. We will always get
1737 replies in order because the proc server is single threaded. */
1740 inf_debug (inf, "waits pending now: %d", proc_waits_pending);
1746 warning ("Can't wait for pid %d: %s", inf->pid, strerror (err));
1749 /* Since we can't see the inferior's signals, don't trap them. */
1750 inf_set_traced (inf, 0);
1753 else if (pid == inf->pid)
1755 store_waitstatus (&inf->wait.status, status);
1756 if (inf->wait.status.kind == TARGET_WAITKIND_STOPPED)
1757 /* The process has sent us a signal, and stopped itself in a sane
1758 state pending our actions. */
1760 inf_debug (inf, "process has stopped itself");
1765 inf->wait.suppress = 1; /* Something odd happened. Ignore. */
1771 S_proc_setmsgport_reply (mach_port_t reply, error_t err,
1772 mach_port_t old_msg_port)
1774 return ill_rpc (__FUNCTION__);
1778 S_proc_getmsgport_reply (mach_port_t reply, error_t err, mach_port_t msg_port)
1780 return ill_rpc (__FUNCTION__);
1783 /* Msg_reply server routines. We only use msg_sig_post_untraced_reply. */
1786 S_msg_sig_post_untraced_reply (mach_port_t reply, error_t err)
1788 struct inf *inf = waiting_inf;
1791 /* EBUSY is what we get when the crash server has grabbed control of the
1792 process and doesn't like what signal we tried to send it. Just act
1793 like the process stopped (using a signal of 0 should mean that the
1794 *next* time the user continues, it will pass signal 0, which the crash
1795 server should like). */
1797 inf->wait.status.kind = TARGET_WAITKIND_STOPPED;
1798 inf->wait.status.value.sig = TARGET_SIGNAL_0;
1801 warning ("Signal delivery failed: %s", strerror (err));
1804 /* We only get this reply when we've posted a signal to a process which we
1805 thought was stopped, and which we expected to continue after the signal.
1806 Given that the signal has failed for some reason, it's reasonable to
1807 assume it's still stopped. */
1810 inf->wait.suppress = 1;
1816 S_msg_sig_post_reply (mach_port_t reply, error_t err)
1818 return ill_rpc (__FUNCTION__);
1821 /* Returns the number of messages queued for the receive right PORT. */
1822 static mach_port_msgcount_t
1823 port_msgs_queued (mach_port_t port)
1825 struct mach_port_status status;
1827 mach_port_get_receive_status (mach_task_self (), port, &status);
1832 return status.mps_msgcount;
1835 /* Resume execution of the inferior process.
1837 If STEP is nonzero, single-step it.
1838 If SIGNAL is nonzero, give it that signal.
1841 -1 true Single step the current thread allowing other threads to run.
1842 -1 false Continue the current thread allowing other threads to run.
1843 X true Single step the given thread, don't allow any others to run.
1844 X false Continue the given thread, do not allow any others to run.
1845 (Where X, of course, is anything except -1)
1847 Note that a resume may not `take' if there are pending exceptions/&c
1848 still unprocessed from the last resume we did (any given resume may result
1849 in multiple events returned by wait).
1852 gnu_resume (int tid, int step, enum target_signal sig)
1854 struct proc *step_thread = 0;
1855 struct inf *inf = current_inferior;
1857 inf_debug (inf, "tid = %d, step = %d, sig = %d", tid, step, sig);
1859 inf_validate_procinfo (inf);
1861 if (sig != TARGET_SIGNAL_0 || inf->stopped)
1863 if (sig == TARGET_SIGNAL_0 && inf->nomsg)
1866 inf_signal (inf, sig);
1868 else if (inf->wait.exc.reply != MACH_PORT_NULL)
1869 /* We received an exception to which we have chosen not to forward, so
1870 abort the faulting thread, which will perhaps retake it. */
1872 proc_abort (inf->wait.thread, 1);
1873 warning ("Aborting %s with unforwarded exception %s.",
1874 proc_string (inf->wait.thread),
1875 target_signal_to_name (inf->wait.status.value.sig));
1878 if (port_msgs_queued (inf->event_port))
1879 /* If there are still messages in our event queue, don't bother resuming
1880 the process, as we're just going to stop it right away anyway. */
1883 inf_update_procs (inf);
1886 /* Allow all threads to run, except perhaps single-stepping one. */
1888 inf_debug (inf, "running all threads; tid = %d", inferior_pid);
1889 tid = inferior_pid; /* What to step. */
1890 inf_set_threads_resume_sc (inf, 0, 1);
1893 /* Just allow a single thread to run. */
1895 struct proc *thread = inf_tid_to_thread (inf, tid);
1897 error ("Can't run single thread id %d: no such thread!");
1898 inf_debug (inf, "running one thread: %d/%d", inf->pid, thread->tid);
1899 inf_set_threads_resume_sc (inf, thread, 0);
1904 step_thread = inf_tid_to_thread (inf, tid);
1906 warning ("Can't step thread id %d: no such thread.", tid);
1908 inf_debug (inf, "stepping thread: %d/%d", inf->pid, step_thread->tid);
1910 if (step_thread != inf->step_thread)
1911 inf_set_step_thread (inf, step_thread);
1913 inf_debug (inf, "here we go...");
1918 gnu_kill_inferior ()
1920 struct proc *task = current_inferior->task;
1923 proc_debug (task, "terminating...");
1924 task_terminate (task->port);
1925 inf_set_pid (current_inferior, -1);
1927 target_mourn_inferior ();
1930 /* Clean up after the inferior dies. */
1933 gnu_mourn_inferior ()
1935 inf_debug (current_inferior, "rip");
1936 inf_detach (current_inferior);
1937 unpush_target (&gnu_ops);
1938 generic_mourn_inferior ();
1941 /* Fork an inferior process, and start debugging it. */
1943 /* Set INFERIOR_PID to the first thread available in the child, if any. */
1945 inf_pick_first_thread ()
1947 if (current_inferior->task && current_inferior->threads)
1948 /* The first thread. */
1949 return current_inferior->threads->tid;
1951 /* What may be the next thread. */
1952 return next_thread_id;
1958 if (!current_inferior)
1959 current_inferior = make_inf ();
1960 return current_inferior;
1964 gnu_create_inferior (exec_file, allargs, env)
1969 struct inf *inf = cur_inf ();
1973 /* We're in the child; make this process stop as soon as it execs. */
1974 inf_debug (inf, "tracing self");
1975 if (ptrace (PTRACE_TRACEME) != 0)
1976 error ("ptrace (PTRACE_TRACEME) failed!");
1978 void attach_to_child (int pid)
1980 /* Attach to the now stopped child, which is actually a shell... */
1981 inf_debug (inf, "attaching to child: %d", pid);
1983 inf_attach (inf, pid);
1986 push_target (&gnu_ops);
1988 inf->pending_execs = 2;
1992 /* Now let the child run again, knowing that it will stop immediately
1993 because of the ptrace. */
1995 inferior_pid = inf_pick_first_thread ();
1997 startup_inferior (inf->pending_execs);
2000 inf_debug (inf, "creating inferior");
2002 fork_inferior (exec_file, allargs, env, trace_me, attach_to_child,
2005 inf_validate_procinfo (inf);
2006 inf_update_signal_thread (inf);
2007 inf_set_traced (inf, inf->want_signals);
2009 /* Execing the process will have trashed our exception ports; steal them
2010 back (or make sure they're restored if the user wants that). */
2011 if (inf->want_exceptions)
2012 inf_steal_exc_ports (inf);
2014 inf_restore_exc_ports (inf);
2017 proceed ((CORE_ADDR) -1, 0, 0);
2020 /* Mark our target-struct as eligible for stray "run" and "attach"
2028 #ifdef ATTACH_DETACH
2030 /* Attach to process PID, then initialize for debugging it
2031 and wait for the trace-trap that results from attaching. */
2033 gnu_attach (args, from_tty)
2039 struct inf *inf = cur_inf ();
2042 error_no_arg ("PID to attach");
2046 if (pid == getpid ()) /* Trying to masturbate? */
2047 error ("I refuse to debug myself!");
2051 exec_file = (char *) get_exec_file (0);
2054 printf_unfiltered ("Attaching to program `%s', pid %d\n",
2057 printf_unfiltered ("Attaching to pid %d\n", pid);
2059 gdb_flush (gdb_stdout);
2062 inf_debug (inf, "attaching to pid: %d", pid);
2064 inf_attach (inf, pid);
2065 inf_update_procs (inf);
2067 inferior_pid = inf_pick_first_thread ();
2070 push_target (&gnu_ops);
2072 /* We have to initialize the terminal settings now, since the code
2073 below might try to restore them. */
2074 target_terminal_init ();
2076 /* If the process was stopped before we attached, make it continue the next
2077 time the user does a continue. */
2078 inf_validate_procinfo (inf);
2080 inf_update_signal_thread (inf);
2081 inf_set_traced (inf, inf->want_signals);
2083 #if 0 /* Do we need this? */
2084 renumber_threads (0); /* Give our threads reasonable names. */
2088 /* Take a program previously attached to and detaches it.
2089 The program resumes execution and will no longer stop
2090 on signals, etc. We'd better not have left any breakpoints
2091 in the program or it'll die when it hits one. For this
2092 to work, it may be necessary for the process to have been
2093 previously attached. It *might* work if the program was
2094 started via fork. */
2096 gnu_detach (args, from_tty)
2102 char *exec_file = get_exec_file (0);
2104 printf_unfiltered ("Detaching from program `%s' pid %d\n",
2105 exec_file, current_inferior->pid);
2107 printf_unfiltered ("Detaching from pid %d\n", current_inferior->pid);
2108 gdb_flush (gdb_stdout);
2111 inf_detach (current_inferior);
2115 unpush_target (&gnu_ops); /* Pop out of handling an inferior */
2117 #endif /* ATTACH_DETACH */
2120 gnu_terminal_init_inferior ()
2122 assert (current_inferior);
2123 terminal_init_inferior_with_pgrp (current_inferior->pid);
2126 /* Get ready to modify the registers array. On machines which store
2127 individual registers, this doesn't need to do anything. On machines
2128 which store all the registers in one fell swoop, this makes sure
2129 that registers contains all the registers from the program being
2133 gnu_prepare_to_store ()
2135 #ifdef CHILD_PREPARE_TO_STORE
2136 CHILD_PREPARE_TO_STORE ();
2141 gnu_open (arg, from_tty)
2145 error ("Use the \"run\" command to start a Unix child process.");
2151 error ("to_stop target function not implemented");
2155 gnu_pid_to_exec_file ()
2157 error ("to_pid_to_exec_file target function not implemented");
2163 gnu_thread_alive (int tid)
2165 inf_update_procs (current_inferior);
2166 return !!inf_tid_to_thread (current_inferior, tid);
2170 * Read inferior task's LEN bytes from ADDR and copy it to MYADDR
2171 * in gdb's address space.
2173 * Return 0 on failure; number of bytes read otherwise.
2176 gnu_read_inferior (task, addr, myaddr, length)
2183 vm_address_t low_address = (vm_address_t) trunc_page (addr);
2184 vm_size_t aligned_length =
2185 (vm_size_t) round_page (addr + length) - low_address;
2189 /* Get memory from inferior with page aligned addresses */
2190 err = vm_read (task, low_address, aligned_length, &copied, ©_count);
2194 err = hurd_safe_copyin (myaddr, (void *) addr - low_address + copied, length);
2197 warning ("Read from inferior faulted: %s", strerror (err));
2201 err = vm_deallocate (mach_task_self (), copied, copy_count);
2203 warning ("gnu_read_inferior vm_deallocate failed: %s", strerror (err));
2208 #define CHK_GOTO_OUT(str,ret) \
2209 do if (ret != KERN_SUCCESS) { errstr = #str; goto out; } while(0)
2211 struct vm_region_list
2213 struct vm_region_list *next;
2214 vm_prot_t protection;
2219 struct obstack region_obstack;
2222 * Write gdb's LEN bytes from MYADDR and copy it to ADDR
2223 * in inferior task's address space.
2226 gnu_write_inferior (task, addr, myaddr, length)
2233 vm_address_t low_address = (vm_address_t) trunc_page (addr);
2234 vm_size_t aligned_length =
2235 (vm_size_t) round_page (addr + length) - low_address;
2240 char *errstr = "Bug in gnu_write_inferior";
2242 struct vm_region_list *region_element;
2243 struct vm_region_list *region_head = (struct vm_region_list *) NULL;
2245 /* Get memory from inferior with page aligned addresses */
2246 err = vm_read (task,
2251 CHK_GOTO_OUT ("gnu_write_inferior vm_read failed", err);
2255 err = hurd_safe_copyout ((void *) addr - low_address + copied, myaddr, length);
2256 CHK_GOTO_OUT ("Write to inferior faulted", err);
2258 obstack_init (®ion_obstack);
2260 /* Do writes atomically.
2261 * First check for holes and unwritable memory.
2264 vm_size_t remaining_length = aligned_length;
2265 vm_address_t region_address = low_address;
2267 struct vm_region_list *scan;
2269 while (region_address < low_address + aligned_length)
2271 vm_prot_t protection;
2272 vm_prot_t max_protection;
2273 vm_inherit_t inheritance;
2275 mach_port_t object_name;
2277 vm_size_t region_length = remaining_length;
2278 vm_address_t old_address = region_address;
2280 err = vm_region (task,
2289 CHK_GOTO_OUT ("vm_region failed", err);
2291 /* Check for holes in memory */
2292 if (old_address != region_address)
2294 warning ("No memory at 0x%x. Nothing written",
2301 if (!(max_protection & VM_PROT_WRITE))
2303 warning ("Memory at address 0x%x is unwritable. Nothing written",
2310 /* Chain the regions for later use */
2312 (struct vm_region_list *)
2313 obstack_alloc (®ion_obstack, sizeof (struct vm_region_list));
2315 region_element->protection = protection;
2316 region_element->start = region_address;
2317 region_element->length = region_length;
2319 /* Chain the regions along with protections */
2320 region_element->next = region_head;
2321 region_head = region_element;
2323 region_address += region_length;
2324 remaining_length = remaining_length - region_length;
2327 /* If things fail after this, we give up.
2328 * Somebody is messing up inferior_task's mappings.
2331 /* Enable writes to the chained vm regions */
2332 for (scan = region_head; scan; scan = scan->next)
2334 boolean_t protection_changed = FALSE;
2336 if (!(scan->protection & VM_PROT_WRITE))
2338 err = vm_protect (task,
2342 scan->protection | VM_PROT_WRITE);
2343 CHK_GOTO_OUT ("vm_protect: enable write failed", err);
2347 err = vm_write (task,
2351 CHK_GOTO_OUT ("vm_write failed", err);
2353 /* Set up the original region protections, if they were changed */
2354 for (scan = region_head; scan; scan = scan->next)
2356 boolean_t protection_changed = FALSE;
2358 if (!(scan->protection & VM_PROT_WRITE))
2360 err = vm_protect (task,
2365 CHK_GOTO_OUT ("vm_protect: enable write failed", err);
2373 obstack_free (®ion_obstack, 0);
2375 (void) vm_deallocate (mach_task_self (),
2380 if (err != KERN_SUCCESS)
2382 warning ("%s: %s", errstr, mach_error_string (err));
2389 /* Return 0 on failure, number of bytes handled otherwise. */
2391 gnu_xfer_memory (memaddr, myaddr, len, write, target)
2396 struct target_ops *target; /* IGNORED */
2401 ? (current_inferior->task ? current_inferior->task->port : 0)
2404 if (task == MACH_PORT_NULL)
2408 inf_debug (current_inferior, "%s %p[%d] %s %p",
2409 write ? "writing" : "reading", memaddr, len,
2410 write ? "<--" : "-->", myaddr);
2412 return gnu_write_inferior (task, memaddr, myaddr, len);
2414 return gnu_read_inferior (task, memaddr, myaddr, len);
2418 /* Return printable description of proc. */
2420 proc_string (struct proc *proc)
2422 static char tid_str[80];
2423 if (proc_is_task (proc))
2424 sprintf (tid_str, "process %d", proc->inf->pid);
2426 sprintf (tid_str, "thread %d.%d",
2427 proc->inf->pid, pid_to_thread_id (proc->tid));
2432 gnu_pid_to_str (int tid)
2434 struct inf *inf = current_inferior;
2435 struct proc *thread = inf_tid_to_thread (inf, tid);
2438 return proc_string (thread);
2441 static char tid_str[80];
2442 sprintf (tid_str, "bogus thread id %d", tid);
2447 extern void gnu_store_registers (int regno);
2448 extern void gnu_fetch_registers (int regno);
2450 struct target_ops gnu_ops;
2455 gnu_ops.to_shortname = "GNU"; /* to_shortname */
2456 gnu_ops.to_longname = "GNU Hurd process"; /* to_longname */
2457 gnu_ops.to_doc = "GNU Hurd process"; /* to_doc */
2458 gnu_ops.to_open = gnu_open; /* to_open */
2459 gnu_ops.to_close = 0; /* to_close */
2460 gnu_ops.to_attach = gnu_attach; /* to_attach */
2461 gnu_ops.to_post_attach = NULL;
2462 gnu_ops.to_require_attach = NULL; /* to_require_attach */
2463 gnu_ops.to_detach = gnu_detach; /* to_detach */
2464 gnu_ops.to_require_detach = NULL; /* to_require_detach */
2465 gnu_ops.to_resume = gnu_resume; /* to_resume */
2466 gnu_ops.to_wait = gnu_wait; /* to_wait */
2467 gnu_ops.to_post_wait = NULL; /* to_post_wait */
2468 gnu_ops.to_fetch_registers = gnu_fetch_registers; /* to_fetch_registers */
2469 gnu_ops.to_store_registers = gnu_store_registers; /* to_store_registers */
2470 gnu_ops.to_prepare_to_store = gnu_prepare_to_store; /* to_prepare_to_store */
2471 gnu_ops.to_xfer_memory = gnu_xfer_memory; /* to_xfer_memory */
2472 gnu_ops.to_files_info = 0; /* to_files_info */
2473 gnu_ops.to_insert_breakpoint = memory_insert_breakpoint;
2474 gnu_ops.to_remove_breakpoint = memory_remove_breakpoint;
2475 gnu_ops.to_terminal_init = gnu_terminal_init_inferior;
2476 gnu_ops.to_terminal_inferior = terminal_inferior;
2477 gnu_ops.to_terminal_ours_for_output = terminal_ours_for_output;
2478 gnu_ops.to_terminal_ours = terminal_ours;
2479 gnu_ops.to_terminal_info = child_terminal_info;
2480 gnu_ops.to_kill = gnu_kill_inferior; /* to_kill */
2481 gnu_ops.to_load = 0; /* to_load */
2482 gnu_ops.to_lookup_symbol = 0; /* to_lookup_symbol */
2483 gnu_ops.to_create_inferior = gnu_create_inferior; /* to_create_inferior */
2484 gnu_ops.to_post_startup_inferior = NULL; /* to_post_startup_inferior */
2485 gnu_ops.to_acknowledge_created_inferior = NULL; /* to_acknowledge_created_inferior */
2486 gnu_ops.to_clone_and_follow_inferior = NULL; /* to_clone_and_follow_inferior */
2487 gnu_ops.to_post_follow_inferior_by_clone = NULL; /* to_post_follow_inferior_by_clone */
2488 gnu_ops.to_insert_fork_catchpoint = NULL;
2489 gnu_ops.to_remove_fork_catchpoint = NULL;
2490 gnu_ops.to_insert_vfork_catchpoint = NULL;
2491 gnu_ops.to_remove_vfork_catchpoint = NULL;
2492 gnu_ops.to_has_forked = NULL; /* to_has_forked */
2493 gnu_ops.to_has_vforked = NULL; /* to_has_vforked */
2494 gnu_ops.to_can_follow_vfork_prior_to_exec = NULL;
2495 gnu_ops.to_post_follow_vfork = NULL; /* to_post_follow_vfork */
2496 gnu_ops.to_insert_exec_catchpoint = NULL;
2497 gnu_ops.to_remove_exec_catchpoint = NULL;
2498 gnu_ops.to_has_execd = NULL;
2499 gnu_ops.to_reported_exec_events_per_exec_call = NULL;
2500 gnu_ops.to_has_exited = NULL;
2501 gnu_ops.to_mourn_inferior = gnu_mourn_inferior; /* to_mourn_inferior */
2502 gnu_ops.to_can_run = gnu_can_run; /* to_can_run */
2503 gnu_ops.to_notice_signals = 0; /* to_notice_signals */
2504 gnu_ops.to_thread_alive = gnu_thread_alive; /* to_thread_alive */
2505 gnu_ops.to_pid_to_str = gnu_pid_to_str; /* to_pid_to_str */
2506 gnu_ops.to_stop = gnu_stop; /* to_stop */
2507 gnu_ops.to_pid_to_exec_file = gnu_pid_to_exec_file; /* to_pid_to_exec_file */
2508 gnu_ops.to_core_file_to_sym_file = NULL;
2509 gnu_ops.to_stratum = process_stratum; /* to_stratum */
2510 gnu_ops.DONT_USE = 0; /* to_next */
2511 gnu_ops.to_has_all_memory = 1; /* to_has_all_memory */
2512 gnu_ops.to_has_memory = 1; /* to_has_memory */
2513 gnu_ops.to_has_stack = 1; /* to_has_stack */
2514 gnu_ops.to_has_registers = 1; /* to_has_registers */
2515 gnu_ops.to_has_execution = 1; /* to_has_execution */
2516 gnu_ops.to_sections = 0; /* sections */
2517 gnu_ops.to_sections_end = 0; /* sections_end */
2518 gnu_ops.to_magic = OPS_MAGIC; /* to_magic */
2519 } /* init_gnu_ops */
2521 /* User task commands. */
2523 struct cmd_list_element *set_task_cmd_list = 0;
2524 struct cmd_list_element *show_task_cmd_list = 0;
2525 /* User thread commands. */
2527 /* Commands with a prefix of `set/show thread'. */
2528 extern struct cmd_list_element *thread_cmd_list;
2529 struct cmd_list_element *set_thread_cmd_list = NULL;
2530 struct cmd_list_element *show_thread_cmd_list = NULL;
2532 /* Commands with a prefix of `set/show thread default'. */
2533 struct cmd_list_element *set_thread_default_cmd_list = NULL;
2534 struct cmd_list_element *show_thread_default_cmd_list = NULL;
2537 set_thread_cmd (char *args, int from_tty)
2539 printf_unfiltered ("\"set thread\" must be followed by the name of a thread property, or \"default\".\n");
2543 show_thread_cmd (char *args, int from_tty)
2545 printf_unfiltered ("\"show thread\" must be followed by the name of a thread property, or \"default\".\n");
2549 set_thread_default_cmd (char *args, int from_tty)
2551 printf_unfiltered ("\"set thread default\" must be followed by the name of a thread property.\n");
2555 show_thread_default_cmd (char *args, int from_tty)
2557 printf_unfiltered ("\"show thread default\" must be followed by the name of a thread property.\n");
2561 parse_int_arg (char *args, char *cmd_prefix)
2566 int val = strtoul (args, &arg_end, 10);
2567 if (*args && *arg_end == '\0')
2570 error ("Illegal argument for \"%s\" command, should be an integer.", cmd_prefix);
2574 _parse_bool_arg (char *args, char *t_val, char *f_val, char *cmd_prefix)
2576 if (!args || strcmp (args, t_val) == 0)
2578 else if (strcmp (args, f_val) == 0)
2581 error ("Illegal argument for \"%s\" command, should be \"%s\" or \"%s\".",
2582 cmd_prefix, t_val, f_val);
2585 #define parse_bool_arg(args, cmd_prefix) \
2586 _parse_bool_arg (args, "on", "off", cmd_prefix)
2589 check_empty (char *args, char *cmd_prefix)
2592 error ("Garbage after \"%s\" command: `%s'", cmd_prefix, args);
2595 /* Returns the alive thread named by INFERIOR_PID, or signals an error. */
2596 static struct proc *
2599 struct inf *inf = cur_inf ();
2600 struct proc *thread = inf_tid_to_thread (inf, inferior_pid);
2602 error ("No current thread.");
2606 /* Returns the current inferior, but signals an error if it has no task. */
2610 struct inf *inf = cur_inf ();
2612 error ("No current process.");
2617 set_task_pause_cmd (char *args, int from_tty)
2619 struct inf *inf = cur_inf ();
2620 int old_sc = inf->pause_sc;
2622 inf->pause_sc = parse_bool_arg (args, "set task pause");
2624 if (old_sc == 0 && inf->pause_sc != 0)
2625 /* If the task is currently unsuspended, immediately suspend it,
2626 otherwise wait until the next time it gets control. */
2631 show_task_pause_cmd (char *args, int from_tty)
2633 struct inf *inf = cur_inf ();
2634 check_empty (args, "show task pause");
2635 printf_unfiltered ("The inferior task %s suspended while gdb has control.\n",
2637 ? (inf->pause_sc == 0 ? "isn't" : "is")
2638 : (inf->pause_sc == 0 ? "won't be" : "will be"));
2642 set_task_detach_sc_cmd (char *args, int from_tty)
2644 cur_inf ()->detach_sc = parse_int_arg (args, "set task detach-suspend-count");
2648 show_task_detach_sc_cmd (char *args, int from_tty)
2650 check_empty (args, "show task detach-suspend-count");
2651 printf_unfiltered ("The inferior task will be left with a suspend count of %d when detaching.\n",
2652 cur_inf ()->detach_sc);
2656 set_thread_default_pause_cmd (char *args, int from_tty)
2658 struct inf *inf = cur_inf ();
2659 inf->default_thread_pause_sc =
2660 parse_bool_arg (args, "set thread default pause") ? 0 : 1;
2664 show_thread_default_pause_cmd (char *args, int from_tty)
2666 struct inf *inf = cur_inf ();
2667 int sc = inf->default_thread_pause_sc;
2668 check_empty (args, "show thread default pause");
2669 printf_unfiltered ("New threads %s suspended while gdb has control%s.\n",
2670 sc ? "are" : "aren't",
2671 !sc && inf->pause_sc ? " (but the task is)" : "");
2675 set_thread_default_run_cmd (char *args, int from_tty)
2677 struct inf *inf = cur_inf ();
2678 inf->default_thread_run_sc =
2679 parse_bool_arg (args, "set thread default run") ? 0 : 1;
2683 show_thread_default_run_cmd (char *args, int from_tty)
2685 struct inf *inf = cur_inf ();
2686 check_empty (args, "show thread default run");
2687 printf_unfiltered ("New threads %s allowed to run.\n",
2688 inf->default_thread_run_sc == 0 ? "are" : "aren't");
2692 set_thread_default_detach_sc_cmd (char *args, int from_tty)
2694 cur_inf ()->default_thread_detach_sc =
2695 parse_int_arg (args, "set thread default detach-suspend-count");
2699 show_thread_default_detach_sc_cmd (char *args, int from_tty)
2701 check_empty (args, "show thread default detach-suspend-count");
2702 printf_unfiltered ("New threads will get a detach-suspend-count of %d.\n",
2703 cur_inf ()->default_thread_detach_sc);
2706 /* Steal a send right called NAME in the inferior task, and make it PROC's
2707 saved exception port. */
2709 steal_exc_port (struct proc *proc, mach_port_t name)
2713 mach_msg_type_name_t port_type;
2715 if (!proc || !proc->inf->task)
2716 error ("No inferior task.");
2718 err = mach_port_extract_right (proc->inf->task->port,
2719 name, MACH_MSG_TYPE_COPY_SEND,
2722 error ("Couldn't extract send right %d from inferior: %s",
2723 name, strerror (err));
2725 if (proc->saved_exc_port)
2726 /* Get rid of our reference to the old one. */
2727 mach_port_deallocate (mach_task_self (), proc->saved_exc_port);
2729 proc->saved_exc_port = port;
2731 if (!proc->exc_port)
2732 /* If PROC is a thread, we may not have set its exception port before.
2733 We can't use proc_steal_exc_port because it also sets saved_exc_port. */
2735 proc->exc_port = proc->inf->event_port;
2736 err = proc_set_exception_port (proc, proc->exc_port);
2737 error ("Can't set exception port for %s: %s",
2738 proc_string (proc), strerror (err));
2743 set_task_exc_port_cmd (char *args, int from_tty)
2745 struct inf *inf = cur_inf ();
2747 error ("No argument to \"set task exception-port\" command.");
2748 steal_exc_port (inf->task, parse_and_eval_address (args));
2752 set_stopped_cmd (char *args, int from_tty)
2754 cur_inf ()->stopped = _parse_bool_arg (args, "yes", "no", "set stopped");
2758 show_stopped_cmd (char *args, int from_tty)
2760 struct inf *inf = active_inf ();
2761 check_empty (args, "show stopped");
2762 printf_unfiltered ("The inferior process %s stopped.\n",
2763 inf->stopped ? "is" : "isn't");
2767 set_sig_thread_cmd (char *args, int from_tty)
2770 struct inf *inf = cur_inf ();
2772 if (!args || (!isdigit (*args) && strcmp (args, "none") != 0))
2773 error ("Illegal argument to \"set signal-thread\" command.\n"
2774 "Should be an integer thread ID, or `none'.");
2776 if (strcmp (args, "none") == 0)
2777 inf->signal_thread = 0;
2780 int tid = thread_id_to_pid (atoi (args));
2782 error ("Thread ID %s not known. Use the \"info threads\" command to\n"
2783 "see the IDs of currently known threads.", args);
2784 inf->signal_thread = inf_tid_to_thread (inf, tid);
2789 show_sig_thread_cmd (char *args, int from_tty)
2791 struct inf *inf = active_inf ();
2792 check_empty (args, "show signal-thread");
2793 if (inf->signal_thread)
2794 printf_unfiltered ("The signal thread is %s.\n",
2795 proc_string (inf->signal_thread));
2797 printf_unfiltered ("There is no signal thread.\n");
2801 set_signals_cmd (char *args, int from_tty)
2804 struct inf *inf = cur_inf ();
2806 inf->want_signals = parse_bool_arg (args, "set signals");
2808 if (inf->task && inf->want_signals != inf->traced)
2809 /* Make this take effect immediately in a running process. */
2810 inf_set_traced (inf, inf->want_signals);
2814 show_signals_cmd (char *args, int from_tty)
2816 struct inf *inf = cur_inf ();
2817 check_empty (args, "show signals");
2818 printf_unfiltered ("The inferior process's signals %s intercepted.\n",
2820 ? (inf->traced ? "are" : "aren't")
2821 : (inf->want_signals ? "will be" : "won't be"));
2825 set_exceptions_cmd (char *args, int from_tty)
2827 struct inf *inf = cur_inf ();
2828 int val = parse_bool_arg (args, "set exceptions");
2830 if (inf->task && inf->want_exceptions != val)
2831 /* Make this take effect immediately in a running process. */
2834 inf->want_exceptions = val;
2838 show_exceptions_cmd (char *args, int from_tty)
2840 struct inf *inf = cur_inf ();
2841 check_empty (args, "show exceptions");
2842 printf_unfiltered ("Exceptions in the inferior %s trapped.\n",
2844 ? (inf->want_exceptions ? "are" : "aren't")
2845 : (inf->want_exceptions ? "will be" : "won't be"));
2849 set_task_cmd (char *args, int from_tty)
2851 printf_unfiltered ("\"set task\" must be followed by the name of a task property.\n");
2855 show_task_cmd (char *args, int from_tty)
2857 struct inf *inf = cur_inf ();
2859 check_empty (args, "show task");
2861 show_signals_cmd (0, from_tty);
2862 show_exceptions_cmd (0, from_tty);
2863 show_task_pause_cmd (0, from_tty);
2865 if (inf->pause_sc == 0)
2866 show_thread_default_pause_cmd (0, from_tty);
2867 show_thread_default_run_cmd (0, from_tty);
2871 show_stopped_cmd (0, from_tty);
2872 show_sig_thread_cmd (0, from_tty);
2875 if (inf->detach_sc != 0)
2876 show_task_detach_sc_cmd (0, from_tty);
2877 if (inf->default_thread_detach_sc != 0)
2878 show_thread_default_detach_sc_cmd (0, from_tty);
2882 set_noninvasive_cmd (char *args, int from_tty)
2884 /* Invert the sense of the arg for each component. */
2885 char *inv_args = parse_bool_arg (args, "set noninvasive") ? "off" : "on";
2887 set_task_pause_cmd (inv_args, from_tty);
2888 set_signals_cmd (inv_args, from_tty);
2889 set_exceptions_cmd (inv_args, from_tty);
2893 info_port_rights (char *args, mach_port_type_t only)
2895 struct inf *inf = active_inf ();
2896 value_ptr vmark = value_mark ();
2899 /* Explicit list of port rights. */
2903 value_ptr val = parse_to_comma_and_eval (&args);
2904 long right = value_as_long (val);
2906 print_port_info (right, 0, inf->task->port, PORTINFO_DETAILS,
2909 error ("%ld: %s.", right, strerror (err));
2913 /* Print all of them. */
2916 print_task_ports_info (inf->task->port, only, PORTINFO_DETAILS,
2919 error ("%s.", strerror (err));
2922 value_free_to_mark (vmark);
2926 info_send_rights_cmd (char *args, int from_tty)
2928 info_port_rights (args, MACH_PORT_TYPE_SEND);
2931 info_recv_rights_cmd (char *args, int from_tty)
2933 info_port_rights (args, MACH_PORT_TYPE_RECEIVE);
2936 info_port_sets_cmd (char *args, int from_tty)
2938 info_port_rights (args, MACH_PORT_TYPE_PORT_SET);
2941 info_dead_names_cmd (char *args, int from_tty)
2943 info_port_rights (args, MACH_PORT_TYPE_DEAD_NAME);
2946 info_port_rights_cmd (char *args, int from_tty)
2948 info_port_rights (args, ~0);
2952 add_task_commands ()
2954 add_cmd ("pause", class_run, set_thread_default_pause_cmd,
2955 "Set whether the new threads are suspended while gdb has control.\n"
2956 "This property normally has no effect because the whole task is\n"
2957 "suspended, however, that may be disabled with \"set task pause off\".\n"
2958 "The default value is \"off\".",
2959 &set_thread_default_cmd_list);
2960 add_cmd ("pause", no_class, show_thread_default_pause_cmd,
2961 "Show whether new threads are suspended while gdb has control.",
2962 &show_thread_default_cmd_list);
2963 add_cmd ("run", class_run, set_thread_default_run_cmd,
2964 "Set whether new threads are allowed to run (once gdb has noticed them).",
2965 &set_thread_default_cmd_list);
2966 add_cmd ("run", no_class, show_thread_default_run_cmd,
2967 "Show whether new threads are allowed to run (once gdb has noticed them).",
2968 &show_thread_default_cmd_list);
2969 add_cmd ("detach-suspend-count", class_run, set_thread_default_detach_sc_cmd,
2970 "Set the default detach-suspend-count value for new threads.",
2971 &set_thread_default_cmd_list);
2972 add_cmd ("detach-suspend-count", no_class, show_thread_default_detach_sc_cmd,
2973 "Show the default detach-suspend-count value for new threads.",
2974 &show_thread_default_cmd_list);
2976 add_cmd ("signals", class_run, set_signals_cmd,
2977 "Set whether the inferior process's signals will be intercepted.\n"
2978 "Mach exceptions (such as breakpoint traps) are not affected.",
2980 add_alias_cmd ("sigs", "signals", class_run, 1, &setlist);
2981 add_cmd ("signals", no_class, show_signals_cmd,
2982 "Show whether the inferior process's signals will be intercepted.",
2984 add_alias_cmd ("sigs", "signals", no_class, 1, &showlist);
2986 add_cmd ("signal-thread", class_run, set_sig_thread_cmd,
2987 "Set the thread that gdb thinks is the libc signal thread.\n"
2988 "This thread is run when delivering a signal to a non-stopped process.",
2990 add_alias_cmd ("sigthread", "signal-thread", class_run, 1, &setlist);
2991 add_cmd ("signal-thread", no_class, show_sig_thread_cmd,
2992 "Set the thread that gdb thinks is the libc signal thread.",
2994 add_alias_cmd ("sigthread", "signal-thread", no_class, 1, &showlist);
2996 add_cmd ("stopped", class_run, set_stopped_cmd,
2997 "Set whether gdb thinks the inferior process is stopped as with SIGSTOP.\n"
2998 "Stopped process will be continued by sending them a signal.",
3000 add_cmd ("stopped", no_class, show_signals_cmd,
3001 "Show whether gdb thinks the inferior process is stopped as with SIGSTOP.",
3004 add_cmd ("exceptions", class_run, set_exceptions_cmd,
3005 "Set whether exceptions in the inferior process will be trapped.\n"
3006 "When exceptions are turned off, neither breakpoints nor single-stepping\n"
3009 /* Allow `set exc' despite conflict with `set exception-port'. */
3010 add_alias_cmd ("exc", "exceptions", class_run, 1, &setlist);
3011 add_cmd ("exceptions", no_class, show_exceptions_cmd,
3012 "Show whether exceptions in the inferior process will be trapped.",
3015 add_prefix_cmd ("task", no_class, set_task_cmd,
3016 "Command prefix for setting task attributes.",
3017 &set_task_cmd_list, "set task ", 0, &setlist);
3018 add_prefix_cmd ("task", no_class, show_task_cmd,
3019 "Command prefix for showing task attributes.",
3020 &show_task_cmd_list, "show task ", 0, &showlist);
3022 add_cmd ("pause", class_run, set_task_pause_cmd,
3023 "Set whether the task is suspended while gdb has control.\n"
3024 "A value of \"on\" takes effect immediately, otherwise nothing\n"
3025 "happens until the next time the program is continued.\n"
3026 "When setting this to \"off\", \"set thread default pause on\"\n"
3027 "can be used to pause individual threads by default instead.",
3028 &set_task_cmd_list);
3029 add_cmd ("pause", no_class, show_task_pause_cmd,
3030 "Show whether the task is suspended while gdb has control.",
3031 &show_task_cmd_list);
3032 add_cmd ("detach-suspend-count", class_run, set_task_detach_sc_cmd,
3033 "Set the suspend count will leave on the thread when detaching.",
3034 &set_task_cmd_list);
3035 add_cmd ("detach-suspend-count", no_class, show_task_detach_sc_cmd,
3036 "Show the suspend count will leave on the thread when detaching.",
3037 &show_task_cmd_list);
3039 add_cmd ("exception-port", no_class, set_task_exc_port_cmd,
3040 "Set the task exception port to which we forward exceptions.\n"
3041 "The argument should be the value of the send right in the task.",
3042 &set_task_cmd_list);
3043 add_alias_cmd ("excp", "exception-port", no_class, 1, &set_task_cmd_list);
3044 add_alias_cmd ("exc-port", "exception-port", no_class, 1, &set_task_cmd_list);
3046 /* A convenient way of turning on all options require to noninvasively
3047 debug running tasks. */
3048 add_cmd ("noninvasive", no_class, set_noninvasive_cmd,
3049 "Set task options so that we interfere as little as possible.\n"
3050 "This is the same as setting `task pause', `exceptions', and"
3051 "`signals' to the opposite value.",
3054 /* Commands to show information about the task's ports. */
3055 add_cmd ("send-rights", class_info, info_send_rights_cmd,
3056 "Show information about the task's send rights",
3058 add_cmd ("receive-rights", class_info, info_recv_rights_cmd,
3059 "Show information about the task's receive rights",
3061 add_cmd ("port-rights", class_info, info_send_rights_cmd,
3062 "Show information about the task's port rights",
3064 add_cmd ("port-sets", class_info, info_port_sets_cmd,
3065 "Show information about the task's port sets",
3067 add_cmd ("dead-names", class_info, info_dead_names_cmd,
3068 "Show information about the task's dead names",
3070 add_info_alias ("ports", "port-rights", 1);
3071 add_info_alias ("port", "port-rights", 1);
3072 add_info_alias ("psets", "port-sets", 1);
3077 set_thread_pause_cmd (char *args, int from_tty)
3079 struct proc *thread = cur_thread ();
3080 int old_sc = thread->pause_sc;
3081 thread->pause_sc = parse_bool_arg (args, "set thread pause");
3082 if (old_sc == 0 && thread->pause_sc != 0 && thread->inf->pause_sc == 0)
3083 /* If the task is currently unsuspended, immediately suspend it,
3084 otherwise wait until the next time it gets control. */
3085 inf_suspend (thread->inf);
3089 show_thread_pause_cmd (char *args, int from_tty)
3091 struct proc *thread = cur_thread ();
3092 int sc = thread->pause_sc;
3093 check_empty (args, "show task pause");
3094 printf_unfiltered ("Thread %s %s suspended while gdb has control%s.\n",
3095 proc_string (thread),
3096 sc ? "is" : "isn't",
3097 !sc && thread->inf->pause_sc ? " (but the task is)" : "");
3101 set_thread_run_cmd (char *args, int from_tty)
3103 struct proc *thread = cur_thread ();
3104 thread->run_sc = parse_bool_arg (args, "set thread run") ? 0 : 1;
3108 show_thread_run_cmd (char *args, int from_tty)
3110 struct proc *thread = cur_thread ();
3111 check_empty (args, "show thread run");
3112 printf_unfiltered ("Thread %s %s allowed to run.",
3113 proc_string (thread),
3114 thread->run_sc == 0 ? "is" : "isn't");
3118 set_thread_detach_sc_cmd (char *args, int from_tty)
3120 cur_thread ()->detach_sc = parse_int_arg (args, "set thread detach-suspend-count");
3124 show_thread_detach_sc_cmd (char *args, int from_tty)
3126 struct proc *thread = cur_thread ();
3127 check_empty (args, "show thread detach-suspend-count");
3128 printf_unfiltered ("Thread %s will be left with a suspend count of %d when detaching.\n",
3129 proc_string (thread),
3134 set_thread_exc_port_cmd (char *args, int from_tty)
3136 struct proc *thread = cur_thread ();
3138 error ("No argument to \"set thread exception-port\" command.");
3139 steal_exc_port (thread, parse_and_eval_address (args));
3144 show_thread_cmd (char *args, int from_tty)
3146 struct proc *thread = cur_thread ();
3147 check_empty (args, "show thread");
3148 show_thread_run_cmd (0, from_tty);
3149 show_thread_pause_cmd (0, from_tty);
3150 if (thread->detach_sc != 0)
3151 show_thread_detach_sc_cmd (0, from_tty);
3156 thread_takeover_sc_cmd (char *args, int from_tty)
3158 struct proc *thread = cur_thread ();
3159 thread_basic_info_data_t _info;
3160 thread_basic_info_t info = &_info;
3161 mach_msg_type_number_t info_len = THREAD_BASIC_INFO_COUNT;
3163 thread_info (thread->port, THREAD_BASIC_INFO, (int *) &info, &info_len);
3165 error ("%s.", strerror (err));
3166 thread->sc = info->suspend_count;
3168 printf_unfiltered ("Suspend count was %d.\n", thread->sc);
3170 vm_deallocate (mach_task_self (), (vm_address_t) info, info_len * sizeof (int));
3173 add_thread_commands ()
3175 add_prefix_cmd ("thread", no_class, set_thread_cmd,
3176 "Command prefix for setting thread properties.",
3177 &set_thread_cmd_list, "set thread ", 0, &setlist);
3178 add_prefix_cmd ("default", no_class, show_thread_cmd,
3179 "Command prefix for setting default thread properties.",
3180 &set_thread_default_cmd_list, "set thread default ", 0,
3181 &set_thread_cmd_list);
3182 add_prefix_cmd ("thread", no_class, set_thread_default_cmd,
3183 "Command prefix for showing thread properties.",
3184 &show_thread_cmd_list, "show thread ", 0, &showlist);
3185 add_prefix_cmd ("default", no_class, show_thread_default_cmd,
3186 "Command prefix for showing default thread properties.",
3187 &show_thread_default_cmd_list, "show thread default ", 0,
3188 &show_thread_cmd_list);
3190 add_cmd ("pause", class_run, set_thread_pause_cmd,
3191 "Set whether the current thread is suspended while gdb has control.\n"
3192 "A value of \"on\" takes effect immediately, otherwise nothing\n"
3193 "happens until the next time the program is continued. This\n"
3194 "property normally has no effect because the whole task is suspended,\n"
3195 "however, that may be disabled with \"set task pause off\".\n"
3196 "The default value is \"off\".",
3197 &set_thread_cmd_list);
3198 add_cmd ("pause", no_class, show_thread_pause_cmd,
3199 "Show whether the current thread is suspended while gdb has control.",
3200 &show_thread_cmd_list);
3202 add_cmd ("run", class_run, set_thread_run_cmd,
3203 "Set whether the current thread is allowed to run.",
3204 &set_thread_cmd_list);
3205 add_cmd ("run", no_class, show_thread_run_cmd,
3206 "Show whether the current thread is allowed to run.",
3207 &show_thread_cmd_list);
3209 add_cmd ("detach-suspend-count", class_run, set_thread_detach_sc_cmd,
3210 "Set the suspend count will leave on the thread when detaching.\n"
3211 "Note that this is relative to suspend count when gdb noticed the thread;\n"
3212 "use the `thread takeover-suspend-count' to force it to an absolute value.",
3213 &set_thread_cmd_list);
3214 add_cmd ("detach-suspend-count", no_class, show_thread_detach_sc_cmd,
3215 "Show the suspend count will leave on the thread when detaching."
3216 "Note that this is relative to suspend count when gdb noticed the thread;\n"
3217 "use the `thread takeover-suspend-count' to force it to an absolute value.",
3218 &show_thread_cmd_list);
3220 add_cmd ("exception-port", no_class, set_thread_exc_port_cmd,
3221 "Set the exception port to which we forward exceptions for the\n"
3222 "current thread, overriding the task exception port.\n"
3223 "The argument should be the value of the send right in the task.",
3224 &set_thread_cmd_list);
3225 add_alias_cmd ("excp", "exception-port", no_class, 1, &set_thread_cmd_list);
3226 add_alias_cmd ("exc-port", "exception-port", no_class, 1, &set_thread_cmd_list);
3228 add_cmd ("takeover-suspend-count", no_class, thread_takeover_sc_cmd,
3229 "Force the threads absolute suspend-count to be gdb's.\n"
3230 "Prior to giving this command, gdb's thread suspend-counts are relative to\n"
3231 "the thread's initial suspend-count when gdb notices the threads.",
3236 _initialize_gnu_nat ()
3238 proc_server = getproc ();
3240 add_target (&gnu_ops);
3241 add_task_commands ();
3242 add_thread_commands ();
3244 add_set_cmd ("gnu-debug", class_maintenance,
3245 var_boolean, (char *) &gnu_debug_flag,
3246 "Set debugging output for the gnu backend.", &maintenancelist);
3249 #ifdef FLUSH_INFERIOR_CACHE
3251 /* When over-writing code on some machines the I-Cache must be flushed
3252 explicitly, because it is not kept coherent by the lazy hardware.
3253 This definitely includes breakpoints, for instance, or else we
3254 end up looping in mysterious Bpt traps */
3257 flush_inferior_icache (pc, amount)
3260 vm_machine_attribute_val_t flush = MATTR_VAL_ICACHE_FLUSH;
3263 ret = vm_machine_attribute (current_inferior->task->port,
3268 if (ret != KERN_SUCCESS)
3269 warning ("Error flushing inferior's cache : %s", strerror (ret));
3271 #endif /* FLUSH_INFERIOR_CACHE */