| /* Interface GDB to the GNU Hurd. |
| Copyright (C) 1992, 1995-2001, 2006-2012 Free Software Foundation, |
| Inc. |
| |
| This file is part of GDB. |
| |
| Written by Miles Bader <miles@gnu.ai.mit.edu> |
| |
| Some code and ideas from m3-nat.c by Jukka Virtanen <jtv@hut.fi> |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include <ctype.h> |
| #include <errno.h> |
| #include <limits.h> |
| #include <setjmp.h> |
| #include <signal.h> |
| #include <stdio.h> |
| #include "gdb_string.h" |
| #include <sys/ptrace.h> |
| |
| #include <mach.h> |
| #include <mach_error.h> |
| #include <mach/exception.h> |
| #include <mach/message.h> |
| #include <mach/notify.h> |
| #include <mach/vm_attributes.h> |
| |
| #include <hurd.h> |
| #include <hurd/interrupt.h> |
| #include <hurd/msg.h> |
| #include <hurd/msg_request.h> |
| #include <hurd/process.h> |
| /* Defined in <hurd/process.h>, but we need forward declarations from |
| <hurd/process_request.h> as well. */ |
| #undef _process_user_ |
| #include <hurd/process_request.h> |
| #include <hurd/signal.h> |
| #include <hurd/sigpreempt.h> |
| |
| #include <portinfo.h> |
| |
| #include "defs.h" |
| #include "inferior.h" |
| #include "symtab.h" |
| #include "value.h" |
| #include "language.h" |
| #include "target.h" |
| #include "gdb_wait.h" |
| #include "gdbcmd.h" |
| #include "gdbcore.h" |
| #include "gdbthread.h" |
| #include "gdb_assert.h" |
| #include "gdb_obstack.h" |
| |
| #include "gnu-nat.h" |
| #include "inf-child.h" |
| |
| #include "exc_request_S.h" |
| #include "notify_S.h" |
| #include "process_reply_S.h" |
| #include "msg_reply_S.h" |
| #include "exc_request_U.h" |
| #include "msg_U.h" |
| |
| static process_t proc_server = MACH_PORT_NULL; |
| |
| /* If we've sent a proc_wait_request to the proc server, the pid of the |
| process we asked about. We can only ever have one outstanding. */ |
| int proc_wait_pid = 0; |
| |
| /* The number of wait requests we've sent, and expect replies from. */ |
| int proc_waits_pending = 0; |
| |
| int gnu_debug_flag = 0; |
| |
| /* Forward decls */ |
| |
| struct inf *make_inf (); |
| void inf_clear_wait (struct inf *inf); |
| void inf_cleanup (struct inf *inf); |
| void inf_startup (struct inf *inf, int pid); |
| int inf_update_suspends (struct inf *inf); |
| void inf_set_pid (struct inf *inf, pid_t pid); |
| void inf_validate_procs (struct inf *inf); |
| void inf_steal_exc_ports (struct inf *inf); |
| void inf_restore_exc_ports (struct inf *inf); |
| struct proc *inf_tid_to_proc (struct inf *inf, int tid); |
| void inf_set_threads_resume_sc (struct inf *inf, |
| struct proc *run_thread, |
| int run_others); |
| int inf_set_threads_resume_sc_for_signal_thread (struct inf *inf); |
| void inf_suspend (struct inf *inf); |
| void inf_resume (struct inf *inf); |
| void inf_set_step_thread (struct inf *inf, struct proc *proc); |
| void inf_detach (struct inf *inf); |
| void inf_attach (struct inf *inf, int pid); |
| void inf_signal (struct inf *inf, enum gdb_signal sig); |
| void inf_continue (struct inf *inf); |
| |
| #define inf_debug(_inf, msg, args...) \ |
| do { struct inf *__inf = (_inf); \ |
| debug ("{inf %d %s}: " msg, __inf->pid, \ |
| host_address_to_string (__inf) , ##args); } while (0) |
| |
| void proc_abort (struct proc *proc, int force); |
| struct proc *make_proc (struct inf *inf, mach_port_t port, int tid); |
| struct proc *_proc_free (struct proc *proc); |
| int proc_update_sc (struct proc *proc); |
| error_t proc_get_exception_port (struct proc *proc, mach_port_t * port); |
| error_t proc_set_exception_port (struct proc *proc, mach_port_t port); |
| static mach_port_t _proc_get_exc_port (struct proc *proc); |
| void proc_steal_exc_port (struct proc *proc, mach_port_t exc_port); |
| void proc_restore_exc_port (struct proc *proc); |
| int proc_trace (struct proc *proc, int set); |
| |
| /* Evaluate RPC_EXPR in a scope with the variables MSGPORT and REFPORT bound |
| to INF's msg port and task port respectively. If it has no msg port, |
| EIEIO is returned. INF must refer to a running process! */ |
| #define INF_MSGPORT_RPC(inf, rpc_expr) \ |
| HURD_MSGPORT_RPC (proc_getmsgport (proc_server, inf->pid, &msgport), \ |
| (refport = inf->task->port, 0), 0, \ |
| msgport ? (rpc_expr) : EIEIO) |
| |
| /* Like INF_MSGPORT_RPC, but will also resume the signal thread to ensure |
| there's someone around to deal with the RPC (and resuspend things |
| afterwards). This effects INF's threads' resume_sc count. */ |
| #define INF_RESUME_MSGPORT_RPC(inf, rpc_expr) \ |
| (inf_set_threads_resume_sc_for_signal_thread (inf) \ |
| ? ({ error_t __e; \ |
| inf_resume (inf); \ |
| __e = INF_MSGPORT_RPC (inf, rpc_expr); \ |
| inf_suspend (inf); \ |
| __e; }) \ |
| : EIEIO) |
| |
| |
| /* The state passed by an exception message. */ |
| struct exc_state |
| { |
| int exception; /* The exception code. */ |
| int code, subcode; |
| mach_port_t handler; /* The real exception port to handle this. */ |
| mach_port_t reply; /* The reply port from the exception call. */ |
| }; |
| |
| /* The results of the last wait an inf did. */ |
| struct inf_wait |
| { |
| struct target_waitstatus status; /* The status returned to gdb. */ |
| struct exc_state exc; /* The exception that caused us to return. */ |
| struct proc *thread; /* The thread in question. */ |
| int suppress; /* Something trivial happened. */ |
| }; |
| |
| /* The state of an inferior. */ |
| struct inf |
| { |
| /* Fields describing the current inferior. */ |
| |
| struct proc *task; /* The mach task. */ |
| struct proc *threads; /* A linked list of all threads in TASK. */ |
| |
| /* True if THREADS needn't be validated by querying the task. We |
| assume that we and the task in question are the only ones |
| frobbing the thread list, so as long as we don't let any code |
| run, we don't have to worry about THREADS changing. */ |
| int threads_up_to_date; |
| |
| pid_t pid; /* The real system PID. */ |
| |
| struct inf_wait wait; /* What to return from target_wait. */ |
| |
| /* One thread proc in INF may be in `single-stepping mode'. This |
| is it. */ |
| struct proc *step_thread; |
| |
| /* The thread we think is the signal thread. */ |
| struct proc *signal_thread; |
| |
| mach_port_t event_port; /* Where we receive various msgs. */ |
| |
| /* True if we think at least one thread in the inferior could currently be |
| running. */ |
| unsigned int running:1; |
| |
| /* True if the process has stopped (in the proc server sense). Note that |
| since a proc server `stop' leaves the signal thread running, the inf can |
| be RUNNING && STOPPED... */ |
| unsigned int stopped:1; |
| |
| /* True if the inferior has no message port. */ |
| unsigned int nomsg:1; |
| |
| /* True if the inferior is traced. */ |
| unsigned int traced:1; |
| |
| /* True if we shouldn't try waiting for the inferior, usually because we |
| can't for some reason. */ |
| unsigned int no_wait:1; |
| |
| /* When starting a new inferior, we don't try to validate threads until all |
| the proper execs have been done. This is a count of how many execs we |
| expect to happen. */ |
| unsigned pending_execs; |
| |
| /* Fields describing global state. */ |
| |
| /* The task suspend count used when gdb has control. This is normally 1 to |
| make things easier for us, but sometimes (like when attaching to vital |
| system servers) it may be desirable to let the task continue to run |
| (pausing individual threads as necessary). */ |
| int pause_sc; |
| |
| /* The task suspend count left when detaching from a task. */ |
| int detach_sc; |
| |
| /* The initial values used for the run_sc and pause_sc of newly discovered |
| threads -- see the definition of those fields in struct proc. */ |
| int default_thread_run_sc; |
| int default_thread_pause_sc; |
| int default_thread_detach_sc; |
| |
| /* True if the process should be traced when started/attached. Newly |
| started processes *must* be traced at first to exec them properly, but |
| if this is false, tracing is turned off as soon it has done so. */ |
| int want_signals; |
| |
| /* True if exceptions from the inferior process should be trapped. This |
| must be on to use breakpoints. */ |
| int want_exceptions; |
| }; |
| |
| |
| int |
| __proc_pid (struct proc *proc) |
| { |
| return proc->inf->pid; |
| } |
| |
| |
| /* Update PROC's real suspend count to match it's desired one. Returns true |
| if we think PROC is now in a runnable state. */ |
| int |
| proc_update_sc (struct proc *proc) |
| { |
| int running; |
| int err = 0; |
| int delta = proc->sc - proc->cur_sc; |
| |
| if (delta) |
| proc_debug (proc, "sc: %d --> %d", proc->cur_sc, proc->sc); |
| |
| if (proc->sc == 0 && proc->state_changed) |
| /* Since PROC may start running, we must write back any state changes. */ |
| { |
| gdb_assert (proc_is_thread (proc)); |
| proc_debug (proc, "storing back changed thread state"); |
| err = thread_set_state (proc->port, THREAD_STATE_FLAVOR, |
| (thread_state_t) &proc->state, THREAD_STATE_SIZE); |
| if (!err) |
| proc->state_changed = 0; |
| } |
| |
| if (delta > 0) |
| { |
| while (delta-- > 0 && !err) |
| { |
| if (proc_is_task (proc)) |
| err = task_suspend (proc->port); |
| else |
| err = thread_suspend (proc->port); |
| } |
| } |
| else |
| { |
| while (delta++ < 0 && !err) |
| { |
| if (proc_is_task (proc)) |
| err = task_resume (proc->port); |
| else |
| err = thread_resume (proc->port); |
| } |
| } |
| if (!err) |
| proc->cur_sc = proc->sc; |
| |
| /* If we got an error, then the task/thread has disappeared. */ |
| running = !err && proc->sc == 0; |
| |
| proc_debug (proc, "is %s", err ? "dead" : running ? "running" : "suspended"); |
| if (err) |
| proc_debug (proc, "err = %s", safe_strerror (err)); |
| |
| if (running) |
| { |
| proc->aborted = 0; |
| proc->state_valid = proc->state_changed = 0; |
| proc->fetched_regs = 0; |
| } |
| |
| return running; |
| } |
| |
| |
| /* Thread_abort is called on PROC if needed. PROC must be a thread proc. |
| If PROC is deemed `precious', then nothing is done unless FORCE is true. |
| In particular, a thread is precious if it's running (in which case forcing |
| it includes suspending it first), or if it has an exception pending. */ |
| void |
| proc_abort (struct proc *proc, int force) |
| { |
| gdb_assert (proc_is_thread (proc)); |
| |
| if (!proc->aborted) |
| { |
| struct inf *inf = proc->inf; |
| int running = (proc->cur_sc == 0 && inf->task->cur_sc == 0); |
| |
| if (running && force) |
| { |
| proc->sc = 1; |
| inf_update_suspends (proc->inf); |
| running = 0; |
| warning (_("Stopped %s."), proc_string (proc)); |
| } |
| else if (proc == inf->wait.thread && inf->wait.exc.reply && !force) |
| /* An exception is pending on PROC, which don't mess with. */ |
| running = 1; |
| |
| if (!running) |
| /* We only abort the thread if it's not actually running. */ |
| { |
| thread_abort (proc->port); |
| proc_debug (proc, "aborted"); |
| proc->aborted = 1; |
| } |
| else |
| proc_debug (proc, "not aborting"); |
| } |
| } |
| |
| /* Make sure that the state field in PROC is up to date, and return a pointer |
| to it, or 0 if something is wrong. If WILL_MODIFY is true, makes sure |
| that the thread is stopped and aborted first, and sets the state_changed |
| field in PROC to true. */ |
| thread_state_t |
| proc_get_state (struct proc *proc, int will_modify) |
| { |
| int was_aborted = proc->aborted; |
| |
| proc_debug (proc, "updating state info%s", |
| will_modify ? " (with intention to modify)" : ""); |
| |
| proc_abort (proc, will_modify); |
| |
| if (!was_aborted && proc->aborted) |
| /* PROC's state may have changed since we last fetched it. */ |
| proc->state_valid = 0; |
| |
| if (!proc->state_valid) |
| { |
| mach_msg_type_number_t state_size = THREAD_STATE_SIZE; |
| error_t err = |
| thread_get_state (proc->port, THREAD_STATE_FLAVOR, |
| (thread_state_t) &proc->state, &state_size); |
| |
| proc_debug (proc, "getting thread state"); |
| proc->state_valid = !err; |
| } |
| |
| if (proc->state_valid) |
| { |
| if (will_modify) |
| proc->state_changed = 1; |
| return (thread_state_t) &proc->state; |
| } |
| else |
| return 0; |
| } |
| |
| |
| /* Set PORT to PROC's exception port. */ |
| error_t |
| proc_get_exception_port (struct proc * proc, mach_port_t * port) |
| { |
| if (proc_is_task (proc)) |
| return task_get_exception_port (proc->port, port); |
| else |
| return thread_get_exception_port (proc->port, port); |
| } |
| |
| /* Set PROC's exception port to PORT. */ |
| error_t |
| proc_set_exception_port (struct proc * proc, mach_port_t port) |
| { |
| proc_debug (proc, "setting exception port: %d", port); |
| if (proc_is_task (proc)) |
| return task_set_exception_port (proc->port, port); |
| else |
| return thread_set_exception_port (proc->port, port); |
| } |
| |
| /* Get PROC's exception port, cleaning up a bit if proc has died. */ |
| static mach_port_t |
| _proc_get_exc_port (struct proc *proc) |
| { |
| mach_port_t exc_port; |
| error_t err = proc_get_exception_port (proc, &exc_port); |
| |
| if (err) |
| /* PROC must be dead. */ |
| { |
| if (proc->exc_port) |
| mach_port_deallocate (mach_task_self (), proc->exc_port); |
| proc->exc_port = MACH_PORT_NULL; |
| if (proc->saved_exc_port) |
| mach_port_deallocate (mach_task_self (), proc->saved_exc_port); |
| proc->saved_exc_port = MACH_PORT_NULL; |
| } |
| |
| return exc_port; |
| } |
| |
| /* Replace PROC's exception port with EXC_PORT, unless it's already |
| been done. Stash away any existing exception port so we can |
| restore it later. */ |
| void |
| proc_steal_exc_port (struct proc *proc, mach_port_t exc_port) |
| { |
| mach_port_t cur_exc_port = _proc_get_exc_port (proc); |
| |
| if (cur_exc_port) |
| { |
| error_t err = 0; |
| |
| proc_debug (proc, "inserting exception port: %d", exc_port); |
| |
| if (cur_exc_port != exc_port) |
| /* Put in our exception port. */ |
| err = proc_set_exception_port (proc, exc_port); |
| |
| if (err || cur_exc_port == proc->exc_port) |
| /* We previously set the exception port, and it's still set. So we |
| just keep the old saved port which is what the proc set. */ |
| { |
| if (cur_exc_port) |
| mach_port_deallocate (mach_task_self (), cur_exc_port); |
| } |
| else |
| /* Keep a copy of PROC's old exception port so it can be restored. */ |
| { |
| if (proc->saved_exc_port) |
| mach_port_deallocate (mach_task_self (), proc->saved_exc_port); |
| proc->saved_exc_port = cur_exc_port; |
| } |
| |
| proc_debug (proc, "saved exception port: %d", proc->saved_exc_port); |
| |
| if (!err) |
| proc->exc_port = exc_port; |
| else |
| warning (_("Error setting exception port for %s: %s"), |
| proc_string (proc), safe_strerror (err)); |
| } |
| } |
| |
| /* If we previously replaced PROC's exception port, put back what we |
| found there at the time, unless *our* exception port has since been |
| overwritten, in which case who knows what's going on. */ |
| void |
| proc_restore_exc_port (struct proc *proc) |
| { |
| mach_port_t cur_exc_port = _proc_get_exc_port (proc); |
| |
| if (cur_exc_port) |
| { |
| error_t err = 0; |
| |
| proc_debug (proc, "restoring real exception port"); |
| |
| if (proc->exc_port == cur_exc_port) |
| /* Our's is still there. */ |
| err = proc_set_exception_port (proc, proc->saved_exc_port); |
| |
| if (proc->saved_exc_port) |
| mach_port_deallocate (mach_task_self (), proc->saved_exc_port); |
| proc->saved_exc_port = MACH_PORT_NULL; |
| |
| if (!err) |
| proc->exc_port = MACH_PORT_NULL; |
| else |
| warning (_("Error setting exception port for %s: %s"), |
| proc_string (proc), safe_strerror (err)); |
| } |
| } |
| |
| |
| /* Turns hardware tracing in PROC on or off when SET is true or false, |
| respectively. Returns true on success. */ |
| int |
| proc_trace (struct proc *proc, int set) |
| { |
| thread_state_t state = proc_get_state (proc, 1); |
| |
| if (!state) |
| return 0; /* The thread must be dead. */ |
| |
| proc_debug (proc, "tracing %s", set ? "on" : "off"); |
| |
| if (set) |
| { |
| /* XXX We don't get the exception unless the thread has its own |
| exception port???? */ |
| if (proc->exc_port == MACH_PORT_NULL) |
| proc_steal_exc_port (proc, proc->inf->event_port); |
| THREAD_STATE_SET_TRACED (state); |
| } |
| else |
| THREAD_STATE_CLEAR_TRACED (state); |
| |
| return 1; |
| } |
| |
| |
| /* A variable from which to assign new TIDs. */ |
| static int next_thread_id = 1; |
| |
| /* Returns a new proc structure with the given fields. Also adds a |
| notification for PORT becoming dead to be sent to INF's notify port. */ |
| struct proc * |
| make_proc (struct inf *inf, mach_port_t port, int tid) |
| { |
| error_t err; |
| mach_port_t prev_port = MACH_PORT_NULL; |
| struct proc *proc = xmalloc (sizeof (struct proc)); |
| |
| proc->port = port; |
| proc->tid = tid; |
| proc->inf = inf; |
| proc->next = 0; |
| proc->saved_exc_port = MACH_PORT_NULL; |
| proc->exc_port = MACH_PORT_NULL; |
| |
| proc->sc = 0; |
| proc->cur_sc = 0; |
| |
| /* Note that these are all the values for threads; the task simply uses the |
| corresponding field in INF directly. */ |
| proc->run_sc = inf->default_thread_run_sc; |
| proc->pause_sc = inf->default_thread_pause_sc; |
| proc->detach_sc = inf->default_thread_detach_sc; |
| proc->resume_sc = proc->run_sc; |
| |
| proc->aborted = 0; |
| proc->dead = 0; |
| proc->state_valid = 0; |
| proc->state_changed = 0; |
| |
| proc_debug (proc, "is new"); |
| |
| /* Get notified when things die. */ |
| err = |
| mach_port_request_notification (mach_task_self (), port, |
| MACH_NOTIFY_DEAD_NAME, 1, |
| inf->event_port, |
| MACH_MSG_TYPE_MAKE_SEND_ONCE, |
| &prev_port); |
| if (err) |
| warning (_("Couldn't request notification for port %d: %s"), |
| port, safe_strerror (err)); |
| else |
| { |
| proc_debug (proc, "notifications to: %d", inf->event_port); |
| if (prev_port != MACH_PORT_NULL) |
| mach_port_deallocate (mach_task_self (), prev_port); |
| } |
| |
| if (inf->want_exceptions) |
| { |
| if (proc_is_task (proc)) |
| /* Make the task exception port point to us. */ |
| proc_steal_exc_port (proc, inf->event_port); |
| else |
| /* Just clear thread exception ports -- they default to the |
| task one. */ |
| proc_steal_exc_port (proc, MACH_PORT_NULL); |
| } |
| |
| return proc; |
| } |
| |
| /* Frees PROC and any resources it uses, and returns the value of PROC's |
| next field. */ |
| struct proc * |
| _proc_free (struct proc *proc) |
| { |
| struct inf *inf = proc->inf; |
| struct proc *next = proc->next; |
| |
| proc_debug (proc, "freeing..."); |
| |
| if (proc == inf->step_thread) |
| /* Turn off single stepping. */ |
| inf_set_step_thread (inf, 0); |
| if (proc == inf->wait.thread) |
| inf_clear_wait (inf); |
| if (proc == inf->signal_thread) |
| inf->signal_thread = 0; |
| |
| if (proc->port != MACH_PORT_NULL) |
| { |
| if (proc->exc_port != MACH_PORT_NULL) |
| /* Restore the original exception port. */ |
| proc_restore_exc_port (proc); |
| if (proc->cur_sc != 0) |
| /* Resume the thread/task. */ |
| { |
| proc->sc = 0; |
| proc_update_sc (proc); |
| } |
| mach_port_deallocate (mach_task_self (), proc->port); |
| } |
| |
| xfree (proc); |
| return next; |
| } |
| |
| |
| struct inf * |
| make_inf (void) |
| { |
| struct inf *inf = xmalloc (sizeof (struct inf)); |
| |
| inf->task = 0; |
| inf->threads = 0; |
| inf->threads_up_to_date = 0; |
| inf->pid = 0; |
| inf->wait.status.kind = TARGET_WAITKIND_SPURIOUS; |
| inf->wait.thread = 0; |
| inf->wait.exc.handler = MACH_PORT_NULL; |
| inf->wait.exc.reply = MACH_PORT_NULL; |
| inf->step_thread = 0; |
| inf->signal_thread = 0; |
| inf->event_port = MACH_PORT_NULL; |
| inf->running = 0; |
| inf->stopped = 0; |
| inf->nomsg = 1; |
| inf->traced = 0; |
| inf->no_wait = 0; |
| inf->pending_execs = 0; |
| inf->pause_sc = 1; |
| inf->detach_sc = 0; |
| inf->default_thread_run_sc = 0; |
| inf->default_thread_pause_sc = 0; |
| inf->default_thread_detach_sc = 0; |
| inf->want_signals = 1; /* By default */ |
| inf->want_exceptions = 1; /* By default */ |
| |
| return inf; |
| } |
| |
| /* Clear INF's target wait status. */ |
| void |
| inf_clear_wait (struct inf *inf) |
| { |
| inf_debug (inf, "clearing wait"); |
| inf->wait.status.kind = TARGET_WAITKIND_SPURIOUS; |
| inf->wait.thread = 0; |
| inf->wait.suppress = 0; |
| if (inf->wait.exc.handler != MACH_PORT_NULL) |
| { |
| mach_port_deallocate (mach_task_self (), inf->wait.exc.handler); |
| inf->wait.exc.handler = MACH_PORT_NULL; |
| } |
| if (inf->wait.exc.reply != MACH_PORT_NULL) |
| { |
| mach_port_deallocate (mach_task_self (), inf->wait.exc.reply); |
| inf->wait.exc.reply = MACH_PORT_NULL; |
| } |
| } |
| |
| |
| void |
| inf_cleanup (struct inf *inf) |
| { |
| inf_debug (inf, "cleanup"); |
| |
| inf_clear_wait (inf); |
| |
| inf_set_pid (inf, -1); |
| inf->pid = 0; |
| inf->running = 0; |
| inf->stopped = 0; |
| inf->nomsg = 1; |
| inf->traced = 0; |
| inf->no_wait = 0; |
| inf->pending_execs = 0; |
| |
| if (inf->event_port) |
| { |
| mach_port_destroy (mach_task_self (), inf->event_port); |
| inf->event_port = MACH_PORT_NULL; |
| } |
| } |
| |
| void |
| inf_startup (struct inf *inf, int pid) |
| { |
| error_t err; |
| |
| inf_debug (inf, "startup: pid = %d", pid); |
| |
| inf_cleanup (inf); |
| |
| /* Make the port on which we receive all events. */ |
| err = mach_port_allocate (mach_task_self (), |
| MACH_PORT_RIGHT_RECEIVE, &inf->event_port); |
| if (err) |
| error (_("Error allocating event port: %s"), safe_strerror (err)); |
| |
| /* Make a send right for it, so we can easily copy it for other people. */ |
| mach_port_insert_right (mach_task_self (), inf->event_port, |
| inf->event_port, MACH_MSG_TYPE_MAKE_SEND); |
| inf_set_pid (inf, pid); |
| } |
| |
| |
| /* Close current process, if any, and attach INF to process PORT. */ |
| void |
| inf_set_pid (struct inf *inf, pid_t pid) |
| { |
| task_t task_port; |
| struct proc *task = inf->task; |
| |
| inf_debug (inf, "setting pid: %d", pid); |
| |
| if (pid < 0) |
| task_port = MACH_PORT_NULL; |
| else |
| { |
| error_t err = proc_pid2task (proc_server, pid, &task_port); |
| |
| if (err) |
| error (_("Error getting task for pid %d: %s"), |
| pid, safe_strerror (err)); |
| } |
| |
| inf_debug (inf, "setting task: %d", task_port); |
| |
| if (inf->pause_sc) |
| task_suspend (task_port); |
| |
| if (task && task->port != task_port) |
| { |
| inf->task = 0; |
| inf_validate_procs (inf); /* Trash all the threads. */ |
| _proc_free (task); /* And the task. */ |
| } |
| |
| if (task_port != MACH_PORT_NULL) |
| { |
| inf->task = make_proc (inf, task_port, PROC_TID_TASK); |
| inf->threads_up_to_date = 0; |
| } |
| |
| if (inf->task) |
| { |
| inf->pid = pid; |
| if (inf->pause_sc) |
| /* Reflect task_suspend above. */ |
| inf->task->sc = inf->task->cur_sc = 1; |
| } |
| else |
| inf->pid = -1; |
| } |
| |
| |
| /* Validates INF's stopped, nomsg and traced field from the actual |
| proc server state. Note that the traced field is only updated from |
| the proc server state if we do not have a message port. If we do |
| have a message port we'd better look at the tracemask itself. */ |
| static void |
| inf_validate_procinfo (struct inf *inf) |
| { |
| char *noise; |
| mach_msg_type_number_t noise_len = 0; |
| struct procinfo *pi; |
| mach_msg_type_number_t pi_len = 0; |
| int info_flags = 0; |
| error_t err = |
| proc_getprocinfo (proc_server, inf->pid, &info_flags, |
| (procinfo_t *) &pi, &pi_len, &noise, &noise_len); |
| |
| if (!err) |
| { |
| inf->stopped = !!(pi->state & PI_STOPPED); |
| inf->nomsg = !!(pi->state & PI_NOMSG); |
| if (inf->nomsg) |
| inf->traced = !!(pi->state & PI_TRACED); |
| vm_deallocate (mach_task_self (), (vm_address_t) pi, pi_len); |
| if (noise_len > 0) |
| vm_deallocate (mach_task_self (), (vm_address_t) noise, noise_len); |
| } |
| } |
| |
| /* Validates INF's task suspend count. If it's higher than we expect, |
| verify with the user before `stealing' the extra count. */ |
| static void |
| inf_validate_task_sc (struct inf *inf) |
| { |
| char *noise; |
| mach_msg_type_number_t noise_len = 0; |
| struct procinfo *pi; |
| mach_msg_type_number_t pi_len = 0; |
| int info_flags = PI_FETCH_TASKINFO; |
| int suspend_count = -1; |
| error_t err; |
| |
| retry: |
| err = proc_getprocinfo (proc_server, inf->pid, &info_flags, |
| (procinfo_t *) &pi, &pi_len, &noise, &noise_len); |
| if (err) |
| { |
| inf->task->dead = 1; /* oh well */ |
| return; |
| } |
| |
| if (inf->task->cur_sc < pi->taskinfo.suspend_count && suspend_count == -1) |
| { |
| /* The proc server might have suspended the task while stopping |
| it. This happens when the task is handling a traced signal. |
| Refetch the suspend count. The proc server should be |
| finished stopping the task by now. */ |
| suspend_count = pi->taskinfo.suspend_count; |
| goto retry; |
| } |
| |
| suspend_count = pi->taskinfo.suspend_count; |
| |
| vm_deallocate (mach_task_self (), (vm_address_t) pi, pi_len); |
| if (noise_len > 0) |
| vm_deallocate (mach_task_self (), (vm_address_t) pi, pi_len); |
| |
| if (inf->task->cur_sc < suspend_count) |
| { |
| int abort; |
| |
| target_terminal_ours (); /* Allow I/O. */ |
| abort = !query (_("Pid %d has an additional task suspend count of %d;" |
| " clear it? "), inf->pid, |
| suspend_count - inf->task->cur_sc); |
| target_terminal_inferior (); /* Give it back to the child. */ |
| |
| if (abort) |
| error (_("Additional task suspend count left untouched.")); |
| |
| inf->task->cur_sc = suspend_count; |
| } |
| } |
| |
| /* Turns tracing for INF on or off, depending on ON, unless it already |
| is. If INF is running, the resume_sc count of INF's threads will |
| be modified, and the signal thread will briefly be run to change |
| the trace state. */ |
| void |
| inf_set_traced (struct inf *inf, int on) |
| { |
| if (on == inf->traced) |
| return; |
| |
| if (inf->task && !inf->task->dead) |
| /* Make it take effect immediately. */ |
| { |
| sigset_t mask = on ? ~(sigset_t) 0 : 0; |
| error_t err = |
| INF_RESUME_MSGPORT_RPC (inf, msg_set_init_int (msgport, refport, |
| INIT_TRACEMASK, mask)); |
| |
| if (err == EIEIO) |
| { |
| if (on) |
| warning (_("Can't modify tracing state for pid %d: %s"), |
| inf->pid, "No signal thread"); |
| inf->traced = on; |
| } |
| else if (err) |
| warning (_("Can't modify tracing state for pid %d: %s"), |
| inf->pid, safe_strerror (err)); |
| else |
| inf->traced = on; |
| } |
| else |
| inf->traced = on; |
| } |
| |
| |
| /* Makes all the real suspend count deltas of all the procs in INF |
| match the desired values. Careful to always do thread/task suspend |
| counts in the safe order. Returns true if at least one thread is |
| thought to be running. */ |
| int |
| inf_update_suspends (struct inf *inf) |
| { |
| struct proc *task = inf->task; |
| |
| /* We don't have to update INF->threads even though we're iterating over it |
| because we'll change a thread only if it already has an existing proc |
| entry. */ |
| inf_debug (inf, "updating suspend counts"); |
| |
| if (task) |
| { |
| struct proc *thread; |
| int task_running = (task->sc == 0), thread_running = 0; |
| |
| if (task->sc > task->cur_sc) |
| /* The task is becoming _more_ suspended; do before any threads. */ |
| task_running = proc_update_sc (task); |
| |
| if (inf->pending_execs) |
| /* When we're waiting for an exec, things may be happening behind our |
| back, so be conservative. */ |
| thread_running = 1; |
| |
| /* Do all the thread suspend counts. */ |
| for (thread = inf->threads; thread; thread = thread->next) |
| thread_running |= proc_update_sc (thread); |
| |
| if (task->sc != task->cur_sc) |
| /* We didn't do the task first, because we wanted to wait for the |
| threads; do it now. */ |
| task_running = proc_update_sc (task); |
| |
| inf_debug (inf, "%srunning...", |
| (thread_running && task_running) ? "" : "not "); |
| |
| inf->running = thread_running && task_running; |
| |
| /* Once any thread has executed some code, we can't depend on the |
| threads list any more. */ |
| if (inf->running) |
| inf->threads_up_to_date = 0; |
| |
| return inf->running; |
| } |
| |
| return 0; |
| } |
| |
| |
| /* Converts a GDB pid to a struct proc. */ |
| struct proc * |
| inf_tid_to_thread (struct inf *inf, int tid) |
| { |
| struct proc *thread = inf->threads; |
| |
| while (thread) |
| if (thread->tid == tid) |
| return thread; |
| else |
| thread = thread->next; |
| return 0; |
| } |
| |
| /* Converts a thread port to a struct proc. */ |
| struct proc * |
| inf_port_to_thread (struct inf *inf, mach_port_t port) |
| { |
| struct proc *thread = inf->threads; |
| |
| while (thread) |
| if (thread->port == port) |
| return thread; |
| else |
| thread = thread->next; |
| return 0; |
| } |
| |
| |
| /* Make INF's list of threads be consistent with reality of TASK. */ |
| void |
| inf_validate_procs (struct inf *inf) |
| { |
| thread_array_t threads; |
| mach_msg_type_number_t num_threads, i; |
| struct proc *task = inf->task; |
| |
| /* If no threads are currently running, this function will guarantee that |
| things are up to date. The exception is if there are zero threads -- |
| then it is almost certainly in an odd state, and probably some outside |
| agent will create threads. */ |
| inf->threads_up_to_date = inf->threads ? !inf->running : 0; |
| |
| if (task) |
| { |
| error_t err = task_threads (task->port, &threads, &num_threads); |
| |
| inf_debug (inf, "fetching threads"); |
| if (err) |
| /* TASK must be dead. */ |
| { |
| task->dead = 1; |
| task = 0; |
| } |
| } |
| |
| if (!task) |
| { |
| num_threads = 0; |
| inf_debug (inf, "no task"); |
| } |
| |
| { |
| /* Make things normally linear. */ |
| mach_msg_type_number_t search_start = 0; |
| /* Which thread in PROCS corresponds to each task thread, & the task. */ |
| struct proc *matched[num_threads + 1]; |
| /* The last thread in INF->threads, so we can add to the end. */ |
| struct proc *last = 0; |
| /* The current thread we're considering. */ |
| struct proc *thread = inf->threads; |
| |
| memset (matched, 0, sizeof (matched)); |
| |
| while (thread) |
| { |
| mach_msg_type_number_t left; |
| |
| for (i = search_start, left = num_threads; left; i++, left--) |
| { |
| if (i >= num_threads) |
| i -= num_threads; /* I wrapped around. */ |
| if (thread->port == threads[i]) |
| /* We already know about this thread. */ |
| { |
| matched[i] = thread; |
| last = thread; |
| thread = thread->next; |
| search_start++; |
| break; |
| } |
| } |
| |
| if (!left) |
| { |
| proc_debug (thread, "died!"); |
| thread->port = MACH_PORT_NULL; |
| thread = _proc_free (thread); /* THREAD is dead. */ |
| if (last) |
| last->next = thread; |
| else |
| inf->threads = thread; |
| } |
| } |
| |
| for (i = 0; i < num_threads; i++) |
| { |
| if (matched[i]) |
| /* Throw away the duplicate send right. */ |
| mach_port_deallocate (mach_task_self (), threads[i]); |
| else |
| /* THREADS[I] is a thread we don't know about yet! */ |
| { |
| ptid_t ptid; |
| |
| thread = make_proc (inf, threads[i], next_thread_id++); |
| if (last) |
| last->next = thread; |
| else |
| inf->threads = thread; |
| last = thread; |
| proc_debug (thread, "new thread: %d", threads[i]); |
| |
| ptid = ptid_build (inf->pid, 0, thread->tid); |
| |
| /* Tell GDB's generic thread code. */ |
| |
| if (ptid_equal (inferior_ptid, pid_to_ptid (inf->pid))) |
| /* This is the first time we're hearing about thread |
| ids, after a fork-child. */ |
| thread_change_ptid (inferior_ptid, ptid); |
| else if (inf->pending_execs != 0) |
| /* This is a shell thread. */ |
| add_thread_silent (ptid); |
| else |
| add_thread (ptid); |
| } |
| } |
| |
| vm_deallocate (mach_task_self (), |
| (vm_address_t) threads, (num_threads * sizeof (thread_t))); |
| } |
| } |
| |
| |
| /* Makes sure that INF's thread list is synced with the actual process. */ |
| int |
| inf_update_procs (struct inf *inf) |
| { |
| if (!inf->task) |
| return 0; |
| if (!inf->threads_up_to_date) |
| inf_validate_procs (inf); |
| return !!inf->task; |
| } |
| |
| /* Sets the resume_sc of each thread in inf. That of RUN_THREAD is set to 0, |
| and others are set to their run_sc if RUN_OTHERS is true, and otherwise |
| their pause_sc. */ |
| void |
| inf_set_threads_resume_sc (struct inf *inf, |
| struct proc *run_thread, int run_others) |
| { |
| struct proc *thread; |
| |
| inf_update_procs (inf); |
| for (thread = inf->threads; thread; thread = thread->next) |
| if (thread == run_thread) |
| thread->resume_sc = 0; |
| else if (run_others) |
| thread->resume_sc = thread->run_sc; |
| else |
| thread->resume_sc = thread->pause_sc; |
| } |
| |
| |
| /* Cause INF to continue execution immediately; individual threads may still |
| be suspended (but their suspend counts will be updated). */ |
| void |
| inf_resume (struct inf *inf) |
| { |
| struct proc *thread; |
| |
| inf_update_procs (inf); |
| |
| for (thread = inf->threads; thread; thread = thread->next) |
| thread->sc = thread->resume_sc; |
| |
| if (inf->task) |
| { |
| if (!inf->pending_execs) |
| /* Try to make sure our task count is correct -- in the case where |
| we're waiting for an exec though, things are too volatile, so just |
| assume things will be reasonable (which they usually will be). */ |
| inf_validate_task_sc (inf); |
| inf->task->sc = 0; |
| } |
| |
| inf_update_suspends (inf); |
| } |
| |
| /* Cause INF to stop execution immediately; individual threads may still |
| be running. */ |
| void |
| inf_suspend (struct inf *inf) |
| { |
| struct proc *thread; |
| |
| inf_update_procs (inf); |
| |
| for (thread = inf->threads; thread; thread = thread->next) |
| thread->sc = thread->pause_sc; |
| |
| if (inf->task) |
| inf->task->sc = inf->pause_sc; |
| |
| inf_update_suspends (inf); |
| } |
| |
| |
| /* INF has one thread PROC that is in single-stepping mode. This |
| function changes it to be PROC, changing any old step_thread to be |
| a normal one. A PROC of 0 clears any existing value. */ |
| void |
| inf_set_step_thread (struct inf *inf, struct proc *thread) |
| { |
| gdb_assert (!thread || proc_is_thread (thread)); |
| |
| if (thread) |
| inf_debug (inf, "setting step thread: %d/%d", inf->pid, thread->tid); |
| else |
| inf_debug (inf, "clearing step thread"); |
| |
| if (inf->step_thread != thread) |
| { |
| if (inf->step_thread && inf->step_thread->port != MACH_PORT_NULL) |
| if (!proc_trace (inf->step_thread, 0)) |
| return; |
| if (thread && proc_trace (thread, 1)) |
| inf->step_thread = thread; |
| else |
| inf->step_thread = 0; |
| } |
| } |
| |
| |
| /* Set up the thread resume_sc's so that only the signal thread is running |
| (plus whatever other thread are set to always run). Returns true if we |
| did so, or false if we can't find a signal thread. */ |
| int |
| inf_set_threads_resume_sc_for_signal_thread (struct inf *inf) |
| { |
| if (inf->signal_thread) |
| { |
| inf_set_threads_resume_sc (inf, inf->signal_thread, 0); |
| return 1; |
| } |
| else |
| return 0; |
| } |
| |
| static void |
| inf_update_signal_thread (struct inf *inf) |
| { |
| /* XXX for now we assume that if there's a msgport, the 2nd thread is |
| the signal thread. */ |
| inf->signal_thread = inf->threads ? inf->threads->next : 0; |
| } |
| |
| |
| /* Detachs from INF's inferior task, letting it run once again... */ |
| void |
| inf_detach (struct inf *inf) |
| { |
| struct proc *task = inf->task; |
| |
| inf_debug (inf, "detaching..."); |
| |
| inf_clear_wait (inf); |
| inf_set_step_thread (inf, 0); |
| |
| if (task) |
| { |
| struct proc *thread; |
| |
| inf_validate_procinfo (inf); |
| |
| inf_set_traced (inf, 0); |
| if (inf->stopped) |
| { |
| if (inf->nomsg) |
| inf_continue (inf); |
| else |
| inf_signal (inf, GDB_SIGNAL_0); |
| } |
| |
| proc_restore_exc_port (task); |
| task->sc = inf->detach_sc; |
| |
| for (thread = inf->threads; thread; thread = thread->next) |
| { |
| proc_restore_exc_port (thread); |
| thread->sc = thread->detach_sc; |
| } |
| |
| inf_update_suspends (inf); |
| } |
| |
| inf_cleanup (inf); |
| } |
| |
| /* Attaches INF to the process with process id PID, returning it in a |
| suspended state suitable for debugging. */ |
| void |
| inf_attach (struct inf *inf, int pid) |
| { |
| inf_debug (inf, "attaching: %d", pid); |
| |
| if (inf->pid) |
| inf_detach (inf); |
| |
| inf_startup (inf, pid); |
| } |
| |
| |
| /* Makes sure that we've got our exception ports entrenched in the process. */ |
| void |
| inf_steal_exc_ports (struct inf *inf) |
| { |
| struct proc *thread; |
| |
| inf_debug (inf, "stealing exception ports"); |
| |
| inf_set_step_thread (inf, 0); /* The step thread is special. */ |
| |
| proc_steal_exc_port (inf->task, inf->event_port); |
| for (thread = inf->threads; thread; thread = thread->next) |
| proc_steal_exc_port (thread, MACH_PORT_NULL); |
| } |
| |
| /* Makes sure the process has its own exception ports. */ |
| void |
| inf_restore_exc_ports (struct inf *inf) |
| { |
| struct proc *thread; |
| |
| inf_debug (inf, "restoring exception ports"); |
| |
| inf_set_step_thread (inf, 0); /* The step thread is special. */ |
| |
| proc_restore_exc_port (inf->task); |
| for (thread = inf->threads; thread; thread = thread->next) |
| proc_restore_exc_port (thread); |
| } |
| |
| |
| /* Deliver signal SIG to INF. If INF is stopped, delivering a signal, even |
| signal 0, will continue it. INF is assumed to be in a paused state, and |
| the resume_sc's of INF's threads may be affected. */ |
| void |
| inf_signal (struct inf *inf, enum gdb_signal sig) |
| { |
| error_t err = 0; |
| int host_sig = gdb_signal_to_host (sig); |
| |
| #define NAME gdb_signal_to_name (sig) |
| |
| if (host_sig >= _NSIG) |
| /* A mach exception. Exceptions are encoded in the signal space by |
| putting them after _NSIG; this assumes they're positive (and not |
| extremely large)! */ |
| { |
| struct inf_wait *w = &inf->wait; |
| |
| if (w->status.kind == TARGET_WAITKIND_STOPPED |
| && w->status.value.sig == sig |
| && w->thread && !w->thread->aborted) |
| /* We're passing through the last exception we received. This is |
| kind of bogus, because exceptions are per-thread whereas gdb |
| treats signals as per-process. We just forward the exception to |
| the correct handler, even it's not for the same thread as TID -- |
| i.e., we pretend it's global. */ |
| { |
| struct exc_state *e = &w->exc; |
| |
| inf_debug (inf, "passing through exception:" |
| " task = %d, thread = %d, exc = %d" |
| ", code = %d, subcode = %d", |
| w->thread->port, inf->task->port, |
| e->exception, e->code, e->subcode); |
| err = |
| exception_raise_request (e->handler, |
| e->reply, MACH_MSG_TYPE_MOVE_SEND_ONCE, |
| w->thread->port, inf->task->port, |
| e->exception, e->code, e->subcode); |
| } |
| else |
| error (_("Can't forward spontaneous exception (%s)."), NAME); |
| } |
| else |
| /* A Unix signal. */ |
| if (inf->stopped) |
| /* The process is stopped and expecting a signal. Just send off a |
| request and let it get handled when we resume everything. */ |
| { |
| inf_debug (inf, "sending %s to stopped process", NAME); |
| err = |
| INF_MSGPORT_RPC (inf, |
| msg_sig_post_untraced_request (msgport, |
| inf->event_port, |
| MACH_MSG_TYPE_MAKE_SEND_ONCE, |
| host_sig, 0, |
| refport)); |
| if (!err) |
| /* Posting an untraced signal automatically continues it. |
| We clear this here rather than when we get the reply |
| because we'd rather assume it's not stopped when it |
| actually is, than the reverse. */ |
| inf->stopped = 0; |
| } |
| else |
| /* It's not expecting it. We have to let just the signal thread |
| run, and wait for it to get into a reasonable state before we |
| can continue the rest of the process. When we finally resume the |
| process the signal we request will be the very first thing that |
| happens. */ |
| { |
| inf_debug (inf, "sending %s to unstopped process" |
| " (so resuming signal thread)", NAME); |
| err = |
| INF_RESUME_MSGPORT_RPC (inf, |
| msg_sig_post_untraced (msgport, host_sig, |
| 0, refport)); |
| } |
| |
| if (err == EIEIO) |
| /* Can't do too much... */ |
| warning (_("Can't deliver signal %s: No signal thread."), NAME); |
| else if (err) |
| warning (_("Delivering signal %s: %s"), NAME, safe_strerror (err)); |
| |
| #undef NAME |
| } |
| |
| |
| /* Continue INF without delivering a signal. This is meant to be used |
| when INF does not have a message port. */ |
| void |
| inf_continue (struct inf *inf) |
| { |
| process_t proc; |
| error_t err = proc_pid2proc (proc_server, inf->pid, &proc); |
| |
| if (!err) |
| { |
| inf_debug (inf, "continuing process"); |
| |
| err = proc_mark_cont (proc); |
| if (!err) |
| { |
| struct proc *thread; |
| |
| for (thread = inf->threads; thread; thread = thread->next) |
| thread_resume (thread->port); |
| |
| inf->stopped = 0; |
| } |
| } |
| |
| if (err) |
| warning (_("Can't continue process: %s"), safe_strerror (err)); |
| } |
| |
| |
| /* The inferior used for all gdb target ops. */ |
| struct inf *gnu_current_inf = 0; |
| |
| /* The inferior being waited for by gnu_wait. Since GDB is decidely not |
| multi-threaded, we don't bother to lock this. */ |
| struct inf *waiting_inf; |
| |
| /* Wait for something to happen in the inferior, returning what in STATUS. */ |
| static ptid_t |
| gnu_wait (struct target_ops *ops, |
| ptid_t ptid, struct target_waitstatus *status, int options) |
| { |
| struct msg |
| { |
| mach_msg_header_t hdr; |
| mach_msg_type_t type; |
| int data[8000]; |
| } msg; |
| error_t err; |
| struct proc *thread; |
| struct inf *inf = gnu_current_inf; |
| |
| extern int exc_server (mach_msg_header_t *, mach_msg_header_t *); |
| extern int msg_reply_server (mach_msg_header_t *, mach_msg_header_t *); |
| extern int notify_server (mach_msg_header_t *, mach_msg_header_t *); |
| extern int process_reply_server (mach_msg_header_t *, mach_msg_header_t *); |
| |
| gdb_assert (inf->task); |
| |
| if (!inf->threads && !inf->pending_execs) |
| /* No threads! Assume that maybe some outside agency is frobbing our |
| task, and really look for new threads. If we can't find any, just tell |
| the user to try again later. */ |
| { |
| inf_validate_procs (inf); |
| if (!inf->threads && !inf->task->dead) |
| error (_("There are no threads; try again later.")); |
| } |
| |
| waiting_inf = inf; |
| |
| inf_debug (inf, "waiting for: %s", target_pid_to_str (ptid)); |
| |
| rewait: |
| if (proc_wait_pid != inf->pid && !inf->no_wait) |
| /* Always get information on events from the proc server. */ |
| { |
| inf_debug (inf, "requesting wait on pid %d", inf->pid); |
| |
| if (proc_wait_pid) |
| /* The proc server is single-threaded, and only allows a single |
| outstanding wait request, so we have to cancel the previous one. */ |
| { |
| inf_debug (inf, "cancelling previous wait on pid %d", proc_wait_pid); |
| interrupt_operation (proc_server, 0); |
| } |
| |
| err = |
| proc_wait_request (proc_server, inf->event_port, inf->pid, WUNTRACED); |
| if (err) |
| warning (_("wait request failed: %s"), safe_strerror (err)); |
| else |
| { |
| inf_debug (inf, "waits pending: %d", proc_waits_pending); |
| proc_wait_pid = inf->pid; |
| /* Even if proc_waits_pending was > 0 before, we still won't |
| get any other replies, because it was either from a |
| different INF, or a different process attached to INF -- |
| and the event port, which is the wait reply port, changes |
| when you switch processes. */ |
| proc_waits_pending = 1; |
| } |
| } |
| |
| inf_clear_wait (inf); |
| |
| /* What can happen? (1) Dead name notification; (2) Exceptions arrive; |
| (3) wait reply from the proc server. */ |
| |
| inf_debug (inf, "waiting for an event..."); |
| err = mach_msg (&msg.hdr, MACH_RCV_MSG | MACH_RCV_INTERRUPT, |
| 0, sizeof (struct msg), inf->event_port, |
| MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL); |
| |
| /* Re-suspend the task. */ |
| inf_suspend (inf); |
| |
| if (!inf->task && inf->pending_execs) |
| /* When doing an exec, it's possible that the old task wasn't reused |
| (e.g., setuid execs). So if the task seems to have disappeared, |
| attempt to refetch it, as the pid should still be the same. */ |
| inf_set_pid (inf, inf->pid); |
| |
| if (err == EMACH_RCV_INTERRUPTED) |
| inf_debug (inf, "interrupted"); |
| else if (err) |
| error (_("Couldn't wait for an event: %s"), safe_strerror (err)); |
| else |
| { |
| struct |
| { |
| mach_msg_header_t hdr; |
| mach_msg_type_t err_type; |
| kern_return_t err; |
| char noise[200]; |
| } |
| reply; |
| |
| inf_debug (inf, "event: msgid = %d", msg.hdr.msgh_id); |
| |
| /* Handle what we got. */ |
| if (!notify_server (&msg.hdr, &reply.hdr) |
| && !exc_server (&msg.hdr, &reply.hdr) |
| && !process_reply_server (&msg.hdr, &reply.hdr) |
| && !msg_reply_server (&msg.hdr, &reply.hdr)) |
| /* Whatever it is, it's something strange. */ |
| error (_("Got a strange event, msg id = %d."), msg.hdr.msgh_id); |
| |
| if (reply.err) |
| error (_("Handling event, msgid = %d: %s"), |
| msg.hdr.msgh_id, safe_strerror (reply.err)); |
| } |
| |
| if (inf->pending_execs) |
| /* We're waiting for the inferior to finish execing. */ |
| { |
| struct inf_wait *w = &inf->wait; |
| enum target_waitkind kind = w->status.kind; |
| |
| if (kind == TARGET_WAITKIND_SPURIOUS) |
| /* Since gdb is actually counting the number of times the inferior |
| stops, expecting one stop per exec, we only return major events |
| while execing. */ |
| { |
| w->suppress = 1; |
| inf_debug (inf, "pending_execs = %d, ignoring minor event", |
| inf->pending_execs); |
| } |
| else if (kind == TARGET_WAITKIND_STOPPED |
| && w->status.value.sig == GDB_SIGNAL_TRAP) |
| /* Ah hah! A SIGTRAP from the inferior while starting up probably |
| means we've succesfully completed an exec! */ |
| { |
| if (--inf->pending_execs == 0) |
| /* We're done! */ |
| { |
| #if 0 /* do we need this? */ |
| prune_threads (1); /* Get rid of the old shell |
| threads. */ |
| renumber_threads (0); /* Give our threads reasonable |
| names. */ |
| #endif |
| } |
| inf_debug (inf, "pending exec completed, pending_execs => %d", |
| inf->pending_execs); |
| } |
| else if (kind == TARGET_WAITKIND_STOPPED) |
| /* It's possible that this signal is because of a crashed process |
| being handled by the hurd crash server; in this case, the process |
| will have an extra task suspend, which we need to know about. |
| Since the code in inf_resume that normally checks for this is |
| disabled while INF->pending_execs, we do the check here instead. */ |
| inf_validate_task_sc (inf); |
| } |
| |
| if (inf->wait.suppress) |
| /* Some totally spurious event happened that we don't consider |
| worth returning to gdb. Just keep waiting. */ |
| { |
| inf_debug (inf, "suppressing return, rewaiting..."); |
| inf_resume (inf); |
| goto rewait; |
| } |
| |
| /* Pass back out our results. */ |
| memcpy (status, &inf->wait.status, sizeof (*status)); |
| |
| thread = inf->wait.thread; |
| if (thread) |
| ptid = ptid_build (inf->pid, 0, thread->tid); |
| else if (ptid_equal (ptid, minus_one_ptid)) |
| thread = inf_tid_to_thread (inf, -1); |
| else |
| thread = inf_tid_to_thread (inf, ptid_get_tid (ptid)); |
| |
| if (!thread || thread->port == MACH_PORT_NULL) |
| { |
| /* TID is dead; try and find a new thread. */ |
| if (inf_update_procs (inf) && inf->threads) |
| ptid = ptid_build (inf->pid, 0, inf->threads->tid); /* The first |
| available |
| thread. */ |
| else |
| ptid = inferior_ptid; /* let wait_for_inferior handle exit case */ |
| } |
| |
| if (thread |
| && !ptid_equal (ptid, minus_one_ptid) |
| && status->kind != TARGET_WAITKIND_SPURIOUS |
| && inf->pause_sc == 0 && thread->pause_sc == 0) |
| /* If something actually happened to THREAD, make sure we |
| suspend it. */ |
| { |
| thread->sc = 1; |
| inf_update_suspends (inf); |
| } |
| |
| inf_debug (inf, "returning ptid = %s, status = %s (%d)", |
| target_pid_to_str (ptid), |
| status->kind == TARGET_WAITKIND_EXITED ? "EXITED" |
| : status->kind == TARGET_WAITKIND_STOPPED ? "STOPPED" |
| : status->kind == TARGET_WAITKIND_SIGNALLED ? "SIGNALLED" |
| : status->kind == TARGET_WAITKIND_LOADED ? "LOADED" |
| : status->kind == TARGET_WAITKIND_SPURIOUS ? "SPURIOUS" |
| : "?", |
| status->value.integer); |
| |
| return ptid; |
| } |
| |
| |
| /* The rpc handler called by exc_server. */ |
| error_t |
| S_exception_raise_request (mach_port_t port, mach_port_t reply_port, |
| thread_t thread_port, task_t task_port, |
| int exception, int code, int subcode) |
| { |
| struct inf *inf = waiting_inf; |
| struct proc *thread = inf_port_to_thread (inf, thread_port); |
| |
| inf_debug (waiting_inf, |
| "thread = %d, task = %d, exc = %d, code = %d, subcode = %d", |
| thread_port, task_port, exception, code, subcode); |
| |
| if (!thread) |
| /* We don't know about thread? */ |
| { |
| inf_update_procs (inf); |
| thread = inf_port_to_thread (inf, thread_port); |
| if (!thread) |
| /* Give up, the generating thread is gone. */ |
| return 0; |
| } |
| |
| mach_port_deallocate (mach_task_self (), thread_port); |
| mach_port_deallocate (mach_task_self (), task_port); |
| |
| if (!thread->aborted) |
| /* THREAD hasn't been aborted since this exception happened (abortion |
| clears any exception state), so it must be real. */ |
| { |
| /* Store away the details; this will destroy any previous info. */ |
| inf->wait.thread = thread; |
| |
| inf->wait.status.kind = TARGET_WAITKIND_STOPPED; |
| |
| if (exception == EXC_BREAKPOINT) |
| /* GDB likes to get SIGTRAP for breakpoints. */ |
| { |
| inf->wait.status.value.sig = GDB_SIGNAL_TRAP; |
| mach_port_deallocate (mach_task_self (), reply_port); |
| } |
| else |
| /* Record the exception so that we can forward it later. */ |
| { |
| if (thread->exc_port == port) |
| { |
| inf_debug (waiting_inf, "Handler is thread exception port <%d>", |
| thread->saved_exc_port); |
| inf->wait.exc.handler = thread->saved_exc_port; |
| } |
| else |
| { |
| inf_debug (waiting_inf, "Handler is task exception port <%d>", |
| inf->task->saved_exc_port); |
| inf->wait.exc.handler = inf->task->saved_exc_port; |
| gdb_assert (inf->task->exc_port == port); |
| } |
| if (inf->wait.exc.handler != MACH_PORT_NULL) |
| /* Add a reference to the exception handler. */ |
| mach_port_mod_refs (mach_task_self (), |
| inf->wait.exc.handler, MACH_PORT_RIGHT_SEND, |
| 1); |
| |
| inf->wait.exc.exception = exception; |
| inf->wait.exc.code = code; |
| inf->wait.exc.subcode = subcode; |
| inf->wait.exc.reply = reply_port; |
| |
| /* Exceptions are encoded in the signal space by putting |
| them after _NSIG; this assumes they're positive (and not |
| extremely large)! */ |
| inf->wait.status.value.sig = |
| gdb_signal_from_host (_NSIG + exception); |
| } |
| } |
| else |
| /* A supppressed exception, which ignore. */ |
| { |
| inf->wait.suppress = 1; |
| mach_port_deallocate (mach_task_self (), reply_port); |
| } |
| |
| return 0; |
| } |
| |
| |
| /* Fill in INF's wait field after a task has died without giving us more |
| detailed information. */ |
| void |
| inf_task_died_status (struct inf *inf) |
| { |
| warning (_("Pid %d died with unknown exit status, using SIGKILL."), |
| inf->pid); |
| inf->wait.status.kind = TARGET_WAITKIND_SIGNALLED; |
| inf->wait.status.value.sig = GDB_SIGNAL_KILL; |
| } |
| |
| /* Notify server routines. The only real one is dead name notification. */ |
| error_t |
| do_mach_notify_dead_name (mach_port_t notify, mach_port_t dead_port) |
| { |
| struct inf *inf = waiting_inf; |
| |
| inf_debug (waiting_inf, "port = %d", dead_port); |
| |
| if (inf->task && inf->task->port == dead_port) |
| { |
| proc_debug (inf->task, "is dead"); |
| inf->task->port = MACH_PORT_NULL; |
| if (proc_wait_pid == inf->pid) |
| /* We have a wait outstanding on the process, which will return more |
| detailed information, so delay until we get that. */ |
| inf->wait.suppress = 1; |
| else |
| /* We never waited for the process (maybe it wasn't a child), so just |
| pretend it got a SIGKILL. */ |
| inf_task_died_status (inf); |
| } |
| else |
| { |
| struct proc *thread = inf_port_to_thread (inf, dead_port); |
| |
| if (thread) |
| { |
| proc_debug (thread, "is dead"); |
| thread->port = MACH_PORT_NULL; |
| } |
| |
| if (inf->task->dead) |
| /* Since the task is dead, its threads are dying with it. */ |
| inf->wait.suppress = 1; |
| } |
| |
| mach_port_deallocate (mach_task_self (), dead_port); |
| inf->threads_up_to_date = 0; /* Just in case. */ |
| |
| return 0; |
| } |
| |
| |
| static error_t |
| ill_rpc (char *fun) |
| { |
| warning (_("illegal rpc: %s"), fun); |
| return 0; |
| } |
| |
| error_t |
| do_mach_notify_no_senders (mach_port_t notify, mach_port_mscount_t count) |
| { |
| return ill_rpc ("do_mach_notify_no_senders"); |
| } |
| |
| error_t |
| do_mach_notify_port_deleted (mach_port_t notify, mach_port_t name) |
| { |
| return ill_rpc ("do_mach_notify_port_deleted"); |
| } |
| |
| error_t |
| do_mach_notify_msg_accepted (mach_port_t notify, mach_port_t name) |
| { |
| return ill_rpc ("do_mach_notify_msg_accepted"); |
| } |
| |
| error_t |
| do_mach_notify_port_destroyed (mach_port_t notify, mach_port_t name) |
| { |
| return ill_rpc ("do_mach_notify_port_destroyed"); |
| } |
| |
| error_t |
| do_mach_notify_send_once (mach_port_t notify) |
| { |
| return ill_rpc ("do_mach_notify_send_once"); |
| } |
| |
| |
| /* Process_reply server routines. We only use process_wait_reply. */ |
| |
| error_t |
| S_proc_wait_reply (mach_port_t reply, error_t err, |
| int status, int sigcode, rusage_t rusage, pid_t pid) |
| { |
| struct inf *inf = waiting_inf; |
| |
| inf_debug (inf, "err = %s, pid = %d, status = 0x%x, sigcode = %d", |
| err ? safe_strerror (err) : "0", pid, status, sigcode); |
| |
| if (err && proc_wait_pid && (!inf->task || !inf->task->port)) |
| /* Ack. The task has died, but the task-died notification code didn't |
| tell anyone because it thought a more detailed reply from the |
| procserver was forthcoming. However, we now learn that won't |
| happen... So we have to act like the task just died, and this time, |
| tell the world. */ |
| inf_task_died_status (inf); |
| |
| if (--proc_waits_pending == 0) |
| /* PROC_WAIT_PID represents the most recent wait. We will always get |
| replies in order because the proc server is single threaded. */ |
| proc_wait_pid = 0; |
| |
| inf_debug (inf, "waits pending now: %d", proc_waits_pending); |
| |
| if (err) |
| { |
| if (err != EINTR) |
| { |
| warning (_("Can't wait for pid %d: %s"), |
| inf->pid, safe_strerror (err)); |
| inf->no_wait = 1; |
| |
| /* Since we can't see the inferior's signals, don't trap them. */ |
| inf_set_traced (inf, 0); |
| } |
| } |
| else if (pid == inf->pid) |
| { |
| store_waitstatus (&inf->wait.status, status); |
| if (inf->wait.status.kind == TARGET_WAITKIND_STOPPED) |
| /* The process has sent us a signal, and stopped itself in a sane |
| state pending our actions. */ |
| { |
| inf_debug (inf, "process has stopped itself"); |
| inf->stopped = 1; |
| } |
| } |
| else |
| inf->wait.suppress = 1; /* Something odd happened. Ignore. */ |
| |
| return 0; |
| } |
| |
| error_t |
| S_proc_setmsgport_reply (mach_port_t reply, error_t err, |
| mach_port_t old_msg_port) |
| { |
| return ill_rpc ("S_proc_setmsgport_reply"); |
| } |
| |
| error_t |
| S_proc_getmsgport_reply (mach_port_t reply, error_t err, mach_port_t msg_port) |
| { |
| return ill_rpc ("S_proc_getmsgport_reply"); |
| } |
| |
| |
| /* Msg_reply server routines. We only use msg_sig_post_untraced_reply. */ |
| |
| error_t |
| S_msg_sig_post_untraced_reply (mach_port_t reply, error_t err) |
| { |
| struct inf *inf = waiting_inf; |
| |
| if (err == EBUSY) |
| /* EBUSY is what we get when the crash server has grabbed control of the |
| process and doesn't like what signal we tried to send it. Just act |
| like the process stopped (using a signal of 0 should mean that the |
| *next* time the user continues, it will pass signal 0, which the crash |
| server should like). */ |
| { |
| inf->wait.status.kind = TARGET_WAITKIND_STOPPED; |
| inf->wait.status.value.sig = GDB_SIGNAL_0; |
| } |
| else if (err) |
| warning (_("Signal delivery failed: %s"), safe_strerror (err)); |
| |
| if (err) |
| /* We only get this reply when we've posted a signal to a process which we |
| thought was stopped, and which we expected to continue after the signal. |
| Given that the signal has failed for some reason, it's reasonable to |
| assume it's still stopped. */ |
| inf->stopped = 1; |
| else |
| inf->wait.suppress = 1; |
| |
| return 0; |
| } |
| |
| error_t |
| S_msg_sig_post_reply (mach_port_t reply, error_t err) |
| { |
| return ill_rpc ("S_msg_sig_post_reply"); |
| } |
| |
| |
| /* Returns the number of messages queued for the receive right PORT. */ |
| static mach_port_msgcount_t |
| port_msgs_queued (mach_port_t port) |
| { |
| struct mach_port_status status; |
| error_t err = |
| mach_port_get_receive_status (mach_task_self (), port, &status); |
| |
| if (err) |
| return 0; |
| else |
| return status.mps_msgcount; |
| } |
| |
| |
| /* Resume execution of the inferior process. |
| |
| If STEP is nonzero, single-step it. |
| If SIGNAL is nonzero, give it that signal. |
| |
| TID STEP: |
| -1 true Single step the current thread allowing other threads to run. |
| -1 false Continue the current thread allowing other threads to run. |
| X true Single step the given thread, don't allow any others to run. |
| X false Continue the given thread, do not allow any others to run. |
| (Where X, of course, is anything except -1) |
| |
| Note that a resume may not `take' if there are pending exceptions/&c |
| still unprocessed from the last resume we did (any given resume may result |
| in multiple events returned by wait). */ |
| |
| static void |
| gnu_resume (struct target_ops *ops, |
| ptid_t ptid, int step, enum gdb_signal sig) |
| { |
| struct proc *step_thread = 0; |
| int resume_all; |
| struct inf *inf = gnu_current_inf; |
| |
| inf_debug (inf, "ptid = %s, step = %d, sig = %d", |
| target_pid_to_str (ptid), step, sig); |
| |
| inf_validate_procinfo (inf); |
| |
| if (sig != GDB_SIGNAL_0 || inf->stopped) |
| { |
| if (sig == GDB_SIGNAL_0 && inf->nomsg) |
| inf_continue (inf); |
| else |
| inf_signal (inf, sig); |
| } |
| else if (inf->wait.exc.reply != MACH_PORT_NULL) |
| /* We received an exception to which we have chosen not to forward, so |
| abort the faulting thread, which will perhaps retake it. */ |
| { |
| proc_abort (inf->wait.thread, 1); |
| warning (_("Aborting %s with unforwarded exception %s."), |
| proc_string (inf->wait.thread), |
| gdb_signal_to_name (inf->wait.status.value.sig)); |
| } |
| |
| if (port_msgs_queued (inf->event_port)) |
| /* If there are still messages in our event queue, don't bother resuming |
| the process, as we're just going to stop it right away anyway. */ |
| return; |
| |
| inf_update_procs (inf); |
| |
| /* A specific PTID means `step only this process id'. */ |
| resume_all = ptid_equal (ptid, minus_one_ptid); |
| |
| if (resume_all) |
| /* Allow all threads to run, except perhaps single-stepping one. */ |
| { |
| inf_debug (inf, "running all threads; tid = %d", PIDGET (inferior_ptid)); |
| ptid = inferior_ptid; /* What to step. */ |
| inf_set_threads_resume_sc (inf, 0, 1); |
| } |
| else |
| /* Just allow a single thread to run. */ |
| { |
| struct proc *thread = inf_tid_to_thread (inf, ptid_get_tid (ptid)); |
| |
| if (!thread) |
| error (_("Can't run single thread id %s: no such thread!"), |
| target_pid_to_str (ptid)); |
| inf_debug (inf, "running one thread: %s", target_pid_to_str (ptid)); |
| inf_set_threads_resume_sc (inf, thread, 0); |
| } |
| |
| if (step) |
| { |
| step_thread = inf_tid_to_thread (inf, ptid_get_tid (ptid)); |
| if (!step_thread) |
| warning (_("Can't step thread id %s: no such thread."), |
| target_pid_to_str (ptid)); |
| else |
| inf_debug (inf, "stepping thread: %s", target_pid_to_str (ptid)); |
| } |
| if (step_thread != inf->step_thread) |
| inf_set_step_thread (inf, step_thread); |
| |
| inf_debug (inf, "here we go..."); |
| inf_resume (inf); |
| } |
| |
| |
| static void |
| gnu_kill_inferior (struct target_ops *ops) |
| { |
| struct proc *task = gnu_current_inf->task; |
| |
| if (task) |
| { |
| proc_debug (task, "terminating..."); |
| task_terminate (task->port); |
| inf_set_pid (gnu_current_inf, -1); |
| } |
| target_mourn_inferior (); |
| } |
| |
| /* Clean up after the inferior dies. */ |
| static void |
| gnu_mourn_inferior (struct target_ops *ops) |
| { |
| inf_debug (gnu_current_inf, "rip"); |
| inf_detach (gnu_current_inf); |
| unpush_target (ops); |
| generic_mourn_inferior (); |
| } |
| |
| |
| /* Fork an inferior process, and start debugging it. */ |
| |
| /* Set INFERIOR_PID to the first thread available in the child, if any. */ |
| static int |
| inf_pick_first_thread (void) |
| { |
| if (gnu_current_inf->task && gnu_current_inf->threads) |
| /* The first thread. */ |
| return gnu_current_inf->threads->tid; |
| else |
| /* What may be the next thread. */ |
| return next_thread_id; |
| } |
| |
| static struct inf * |
| cur_inf (void) |
| { |
| if (!gnu_current_inf) |
| gnu_current_inf = make_inf (); |
| return gnu_current_inf; |
| } |
| |
| static void |
| gnu_create_inferior (struct target_ops *ops, |
| char *exec_file, char *allargs, char **env, |
| int from_tty) |
| { |
| struct inf *inf = cur_inf (); |
| int pid; |
| |
| void trace_me () |
| { |
| /* We're in the child; make this process stop as soon as it execs. */ |
| inf_debug (inf, "tracing self"); |
| if (ptrace (PTRACE_TRACEME) != 0) |
| error (_("ptrace (PTRACE_TRACEME) failed!")); |
| } |
| |
| inf_debug (inf, "creating inferior"); |
| |
| pid = fork_inferior (exec_file, allargs, env, trace_me, |
| NULL, NULL, NULL, NULL); |
| |
| /* Attach to the now stopped child, which is actually a shell... */ |
| inf_debug (inf, "attaching to child: %d", pid); |
| |
| inf_attach (inf, pid); |
| |
| push_target (ops); |
| |
| inf->pending_execs = 2; |
| inf->nomsg = 1; |
| inf->traced = 1; |
| |
| /* Now let the child run again, knowing that it will stop |
| immediately because of the ptrace. */ |
| inf_resume (inf); |
| |
| /* We now have thread info. */ |
| thread_change_ptid (inferior_ptid, |
| ptid_build (inf->pid, 0, inf_pick_first_thread ())); |
| |
| startup_inferior (inf->pending_execs); |
| |
| inf_validate_procinfo (inf); |
| inf_update_signal_thread (inf); |
| inf_set_traced (inf, inf->want_signals); |
| |
| /* Execing the process will have trashed our exception ports; steal them |
| back (or make sure they're restored if the user wants that). */ |
| if (inf->want_exceptions) |
| inf_steal_exc_ports (inf); |
| else |
| inf_restore_exc_ports (inf); |
| } |
| |
| |
| /* Attach to process PID, then initialize for debugging it |
| and wait for the trace-trap that results from attaching. */ |
| static void |
| gnu_attach (struct target_ops *ops, char *args, int from_tty) |
| { |
| int pid; |
| char *exec_file; |
| struct inf *inf = cur_inf (); |
| struct inferior *inferior; |
| |
| pid = parse_pid_to_attach (args); |
| |
| if (pid == getpid ()) /* Trying to masturbate? */ |
| error (_("I refuse to debug myself!")); |
| |
| if (from_tty) |
| { |
| exec_file = (char *) get_exec_file (0); |
| |
| if (exec_file) |
| printf_unfiltered ("Attaching to program `%s', pid %d\n", |
| exec_file, pid); |
| else |
| printf_unfiltered ("Attaching to pid %d\n", pid); |
| |
| gdb_flush (gdb_stdout); |
| } |
| |
| inf_debug (inf, "attaching to pid: %d", pid); |
| |
| inf_attach (inf, pid); |
| |
| push_target (ops); |
| |
| inferior = current_inferior (); |
| inferior_appeared (inferior, pid); |
| inferior->attach_flag = 1; |
| |
| inf_update_procs (inf); |
| |
| inferior_ptid = ptid_build (pid, 0, inf_pick_first_thread ()); |
| |
| /* We have to initialize the terminal settings now, since the code |
| below might try to restore them. */ |
| target_terminal_init (); |
| |
| /* If the process was stopped before we attached, make it continue the next |
| time the user does a continue. */ |
| inf_validate_procinfo (inf); |
| |
| inf_update_signal_thread (inf); |
| inf_set_traced (inf, inf->want_signals); |
| |
| #if 0 /* Do we need this? */ |
| renumber_threads (0); /* Give our threads reasonable names. */ |
| #endif |
| } |
| |
| |
| /* Take a program previously attached to and detaches it. |
| The program resumes execution and will no longer stop |
| on signals, etc. We'd better not have left any breakpoints |
| in the program or it'll die when it hits one. For this |
| to work, it may be necessary for the process to have been |
| previously attached. It *might* work if the program was |
| started via fork. */ |
| static void |
| gnu_detach (struct target_ops *ops, char *args, int from_tty) |
| { |
| int pid; |
| |
| if (from_tty) |
| { |
| char *exec_file = get_exec_file (0); |
| |
| if (exec_file) |
| printf_unfiltered ("Detaching from program `%s' pid %d\n", |
| exec_file, gnu_current_inf->pid); |
| else |
| printf_unfiltered ("Detaching from pid %d\n", gnu_current_inf->pid); |
| gdb_flush (gdb_stdout); |
| } |
| |
| pid = gnu_current_inf->pid; |
| |
| inf_detach (gnu_current_inf); |
| |
| inferior_ptid = null_ptid; |
| detach_inferior (pid); |
| |
| unpush_target (ops); /* Pop out of handling an inferior. */ |
| } |
| |
| static void |
| gnu_terminal_init_inferior (void) |
| { |
| gdb_assert (gnu_current_inf); |
| terminal_init_inferior_with_pgrp (gnu_current_inf->pid); |
| } |
| |
| static void |
| gnu_stop (ptid_t ptid) |
| { |
| error (_("to_stop target function not implemented")); |
| } |
| |
| static int |
| gnu_thread_alive (struct target_ops *ops, ptid_t ptid) |
| { |
| inf_update_procs (gnu_current_inf); |
| return !!inf_tid_to_thread (gnu_current_inf, |
| ptid_get_tid (ptid)); |
| } |
| |
| |
| /* Read inferior task's LEN bytes from ADDR and copy it to MYADDR in |
| gdb's address space. Return 0 on failure; number of bytes read |
| otherwise. */ |
| int |
| gnu_read_inferior (task_t task, CORE_ADDR addr, char *myaddr, int length) |
| { |
| error_t err; |
| vm_address_t low_address = (vm_address_t) trunc_page (addr); |
| vm_size_t aligned_length = |
| (vm_size_t) round_page (addr + length) - low_address; |
| pointer_t copied; |
| int copy_count; |
| |
| /* Get memory from inferior with page aligned addresses. */ |
| err = vm_read (task, low_address, aligned_length, &copied, ©_count); |
| if (err) |
| return 0; |
| |
| err = hurd_safe_copyin (myaddr, (void *) (addr - low_address + copied), |
| length); |
| if (err) |
| { |
| warning (_("Read from inferior faulted: %s"), safe_strerror (err)); |
| length = 0; |
| } |
| |
| err = vm_deallocate (mach_task_self (), copied, copy_count); |
| if (err) |
| warning (_("gnu_read_inferior vm_deallocate failed: %s"), |
| safe_strerror (err)); |
| |
| return length; |
| } |
| |
| #define CHK_GOTO_OUT(str,ret) \ |
| do if (ret != KERN_SUCCESS) { errstr = #str; goto out; } while(0) |
| |
| struct vm_region_list |
| { |
| struct vm_region_list *next; |
| vm_prot_t protection; |
| vm_address_t start; |
| vm_size_t length; |
| }; |
| |
| struct obstack region_obstack; |
| |
| /* Write gdb's LEN bytes from MYADDR and copy it to ADDR in inferior |
| task's address space. */ |
| int |
| gnu_write_inferior (task_t task, CORE_ADDR addr, char *myaddr, int length) |
| { |
| error_t err = 0; |
| vm_address_t low_address = (vm_address_t) trunc_page (addr); |
| vm_size_t aligned_length = |
| (vm_size_t) round_page (addr + length) - low_address; |
| pointer_t copied; |
| int copy_count; |
| int deallocate = 0; |
| |
| char *errstr = "Bug in gnu_write_inferior"; |
| |
| struct vm_region_list *region_element; |
| struct vm_region_list *region_head = (struct vm_region_list *) NULL; |
| |
| /* Get memory from inferior with page aligned addresses. */ |
| err = vm_read (task, |
| low_address, |
| aligned_length, |
| &copied, |
| ©_count); |
| CHK_GOTO_OUT ("gnu_write_inferior vm_read failed", err); |
| |
| deallocate++; |
| |
| err = hurd_safe_copyout ((void *) (addr - low_address + copied), |
| myaddr, length); |
| CHK_GOTO_OUT ("Write to inferior faulted", err); |
| |
| obstack_init (®ion_obstack); |
| |
| /* Do writes atomically. |
| First check for holes and unwritable memory. */ |
| { |
| vm_size_t remaining_length = aligned_length; |
| vm_address_t region_address = low_address; |
| |
| struct vm_region_list *scan; |
| |
| while (region_address < low_address + aligned_length) |
| { |
| vm_prot_t protection; |
| vm_prot_t max_protection; |
| vm_inherit_t inheritance; |
| boolean_t shared; |
| mach_port_t object_name; |
| vm_offset_t offset; |
| vm_size_t region_length = remaining_length; |
| vm_address_t old_address = region_address; |
| |
| err = vm_region (task, |
| ®ion_address, |
| ®ion_length, |
| &protection, |
| &max_protection, |
| &inheritance, |
| &shared, |
| &object_name, |
| &offset); |
| CHK_GOTO_OUT ("vm_region failed", err); |
| |
| /* Check for holes in memory. */ |
| if (old_address != region_address) |
| { |
| warning (_("No memory at 0x%x. Nothing written"), |
| old_address); |
| err = KERN_SUCCESS; |
| length = 0; |
| goto out; |
| } |
| |
| if (!(max_protection & VM_PROT_WRITE)) |
| { |
| warning (_("Memory at address 0x%x is unwritable. " |
| "Nothing written"), |
| old_address); |
| err = KERN_SUCCESS; |
| length = 0; |
| goto out; |
| } |
| |
| /* Chain the regions for later use. */ |
| region_element = |
| (struct vm_region_list *) |
| obstack_alloc (®ion_obstack, sizeof (struct vm_region_list)); |
| |
| region_element->protection = protection; |
| region_element->start = region_address; |
| region_element->length = region_length; |
| |
| /* Chain the regions along with protections. */ |
| region_element->next = region_head; |
| region_head = region_element; |
| |
| region_address += region_length; |
| remaining_length = remaining_length - region_length; |
| } |
| |
| /* If things fail after this, we give up. |
| Somebody is messing up inferior_task's mappings. */ |
| |
| /* Enable writes to the chained vm regions. */ |
| for (scan = region_head; scan; scan = scan->next) |
| { |
| if (!(scan->protection & VM_PROT_WRITE)) |
| { |
| err = vm_protect (task, |
| scan->start, |
| scan->length, |
| FALSE, |
| scan->protection | VM_PROT_WRITE); |
| CHK_GOTO_OUT ("vm_protect: enable write failed", err); |
| } |
| } |
| |
| err = vm_write (task, |
| low_address, |
| copied, |
| aligned_length); |
| CHK_GOTO_OUT ("vm_write failed", err); |
| |
| /* Set up the original region protections, if they were changed. */ |
| for (scan = region_head; scan; scan = scan->next) |
| { |
| if (!(scan->protection & VM_PROT_WRITE)) |
| { |
| err = vm_protect (task, |
| scan->start, |
| scan->length, |
| FALSE, |
| scan->protection); |
| CHK_GOTO_OUT ("vm_protect: enable write failed", err); |
| } |
| } |
| } |
| |
| out: |
| if (deallocate) |
| { |
| obstack_free (®ion_obstack, 0); |
| |
| (void) vm_deallocate (mach_task_self (), |
| copied, |
| copy_count); |
| } |
| |
| if (err != KERN_SUCCESS) |
| { |
| warning (_("%s: %s"), errstr, mach_error_string (err)); |
| return 0; |
| } |
| |
| return length; |
| } |
| |
| |
| /* Return 0 on failure, number of bytes handled otherwise. TARGET |
| is ignored. */ |
| static int |
| gnu_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write, |
| struct mem_attrib *attrib, |
| struct target_ops *target) |
| { |
| task_t task = (gnu_current_inf |
| ? (gnu_current_inf->task |
| ? gnu_current_inf->task->port : 0) |
| : 0); |
| |
| if (task == MACH_PORT_NULL) |
| return 0; |
| else |
| { |
| inf_debug (gnu_current_inf, "%s %s[%d] %s %s", |
| write ? "writing" : "reading", |
| paddress (target_gdbarch, memaddr), len, |
| write ? "<--" : "-->", host_address_to_string (myaddr)); |
| if (write) |
| return gnu_write_inferior (task, memaddr, myaddr, len); |
| else |
| return gnu_read_inferior (task, memaddr, myaddr, len); |
| } |
| } |
| |
| /* Call FUNC on each memory region in the task. */ |
| static int |
| gnu_find_memory_regions (find_memory_region_ftype func, void *data) |
| { |
| error_t err; |
| task_t task; |
| vm_address_t region_address, last_region_address, last_region_end; |
| vm_prot_t last_protection; |
| |
| if (gnu_current_inf == 0 || gnu_current_inf->task == 0) |
| return 0; |
| task = gnu_current_inf->task->port; |
| if (task == MACH_PORT_NULL) |
| return 0; |
| |
| region_address = last_region_address = last_region_end = VM_MIN_ADDRESS; |
| last_protection = VM_PROT_NONE; |
| while (region_address < VM_MAX_ADDRESS) |
| { |
| vm_prot_t protection; |
| vm_prot_t max_protection; |
| vm_inherit_t inheritance; |
| boolean_t shared; |
| mach_port_t object_name; |
| vm_offset_t offset; |
| vm_size_t region_length = VM_MAX_ADDRESS - region_address; |
| vm_address_t old_address = region_address; |
| |
| err = vm_region (task, |
| ®ion_address, |
| ®ion_length, |
| &protection, |
| &max_protection, |
| &inheritance, |
| &shared, |
| &object_name, |
| &offset); |
| if (err == KERN_NO_SPACE) |
| break; |
| if (err != KERN_SUCCESS) |
| { |
| warning (_("vm_region failed: %s"), mach_error_string (err)); |
| return -1; |
| } |
| |
| if (protection == last_protection && region_address == last_region_end) |
| /* This region is contiguous with and indistinguishable from |
| the previous one, so we just extend that one. */ |
| last_region_end = region_address += region_length; |
| else |
| { |
| /* This region is distinct from the last one we saw, so report |
| that previous one. */ |
| if (last_protection != VM_PROT_NONE) |
| (*func) (last_region_address, |
| last_region_end - last_region_address, |
| last_protection & VM_PROT_READ, |
| last_protection & VM_PROT_WRITE, |
| last_protection & VM_PROT_EXECUTE, |
| data); |
| last_region_address = region_address; |
| last_region_end = region_address += region_length; |
| last_protection = protection; |
| } |
| } |
| |
| /* Report the final region. */ |
| if (last_region_end > last_region_address && last_protection != VM_PROT_NONE) |
| (*func) (last_region_address, last_region_end - last_region_address, |
| last_protection & VM_PROT_READ, |
| last_protection & VM_PROT_WRITE, |
| last_protection & VM_PROT_EXECUTE, |
| data); |
| |
| return 0; |
| } |
| |
| |
| /* Return printable description of proc. */ |
| char * |
| proc_string (struct proc *proc) |
| { |
| static char tid_str[80]; |
| |
| if (proc_is_task (proc)) |
| sprintf (tid_str, "process %d", proc->inf->pid); |
| else |
| sprintf (tid_str, "Thread %d.%d", |
| proc->inf->pid, proc->tid); |
| return tid_str; |
| } |
| |
| static char * |
| gnu_pid_to_str (struct target_ops *ops, ptid_t ptid) |
| { |
| struct inf *inf = gnu_current_inf; |
| int tid = ptid_get_tid (ptid); |
| struct proc *thread = inf_tid_to_thread (inf, tid); |
| |
| if (thread) |
| return proc_string (thread); |
| else |
| { |
| static char tid_str[80]; |
| |
| sprintf (tid_str, "bogus thread id %d", tid); |
| return tid_str; |
| } |
| } |
| |
| |
| /* Create a prototype generic GNU/Hurd target. The client can |
| override it with local methods. */ |
| |
| struct target_ops * |
| gnu_target (void) |
| { |
| struct target_ops *t = inf_child_target (); |
| |
| t->to_shortname = "GNU"; |
| t->to_longname = "GNU Hurd process"; |
| t->to_doc = "GNU Hurd process"; |
| |
| t->to_attach = gnu_attach; |
| t->to_attach_no_wait = 1; |
| t->to_detach = gnu_detach; |
| t->to_resume = gnu_resume; |
| t->to_wait = gnu_wait; |
| t->deprecated_xfer_memory = gnu_xfer_memory; |
| t->to_find_memory_regions = gnu_find_memory_regions; |
| t->to_terminal_init = gnu_terminal_init_inferior; |
| t->to_kill = gnu_kill_inferior; |
| t->to_create_inferior = gnu_create_inferior; |
| t->to_mourn_inferior = gnu_mourn_inferior; |
| t->to_thread_alive = gnu_thread_alive; |
| t->to_pid_to_str = gnu_pid_to_str; |
| t->to_stop = gnu_stop; |
| |
| return t; |
| } |
| |
| |
| /* User task commands. */ |
| |
| struct cmd_list_element *set_task_cmd_list = 0; |
| struct cmd_list_element *show_task_cmd_list = 0; |
| /* User thread commands. */ |
| |
| /* Commands with a prefix of `set/show thread'. */ |
| extern struct cmd_list_element *thread_cmd_list; |
| struct cmd_list_element *set_thread_cmd_list = NULL; |
| struct cmd_list_element *show_thread_cmd_list = NULL; |
| |
| /* Commands with a prefix of `set/show thread default'. */ |
| struct cmd_list_element *set_thread_default_cmd_list = NULL; |
| struct cmd_list_element *show_thread_default_cmd_list = NULL; |
| |
| static void |
| set_thread_cmd (char *args, int from_tty) |
| { |
| printf_unfiltered ("\"set thread\" must be followed by the " |
| "name of a thread property, or \"default\".\n"); |
| } |
| |
| static void |
| show_thread_cmd (char *args, int from_tty) |
| { |
| printf_unfiltered ("\"show thread\" must be followed by the " |
| "name of a thread property, or \"default\".\n"); |
| } |
| |
| static void |
| set_thread_default_cmd (char *args, int from_tty) |
| { |
| printf_unfiltered ("\"set thread default\" must be followed " |
| "by the name of a thread property.\n"); |
| } |
| |
| static void |
| show_thread_default_cmd (char *args, int from_tty) |
| { |
| printf_unfiltered ("\"show thread default\" must be followed " |
| "by the name of a thread property.\n"); |
| } |
| |
| static int |
| parse_int_arg (char *args, char *cmd_prefix) |
| { |
| if (args) |
| { |
| char *arg_end; |
| int val = strtoul (args, &arg_end, 10); |
| |
| if (*args && *arg_end == '\0') |
| return val; |
| } |
| error (_("Illegal argument for \"%s\" command, should be an integer."), |
| cmd_prefix); |
| } |
| |
| static int |
| _parse_bool_arg (char *args, char *t_val, char *f_val, char *cmd_prefix) |
| { |
| if (!args || strcmp (args, t_val) == 0) |
| return 1; |
| else if (strcmp (args, f_val) == 0) |
| return 0; |
| else |
| error (_("Illegal argument for \"%s\" command, " |
| "should be \"%s\" or \"%s\"."), |
| cmd_prefix, t_val, f_val); |
| } |
| |
| #define parse_bool_arg(args, cmd_prefix) \ |
| _parse_bool_arg (args, "on", "off", cmd_prefix) |
| |
| static void |
| check_empty (char *args, char *cmd_prefix) |
| { |
| if (args) |
| error (_("Garbage after \"%s\" command: `%s'"), cmd_prefix, args); |
| } |
| |
| /* Returns the alive thread named by INFERIOR_PID, or signals an error. */ |
| static struct proc * |
| cur_thread (void) |
| { |
| struct inf *inf = cur_inf (); |
| struct proc *thread = inf_tid_to_thread (inf, |
| ptid_get_tid (inferior_ptid)); |
| if (!thread) |
| error (_("No current thread.")); |
| return thread; |
| } |
| |
| /* Returns the current inferior, but signals an error if it has no task. */ |
| static struct inf * |
| active_inf (void) |
| { |
| struct inf *inf = cur_inf (); |
| |
| if (!inf->task) |
| error (_("No current process.")); |
| return inf; |
| } |
| |
| |
| static void |
| set_task_pause_cmd (char *args, int from_tty) |
| { |
| struct inf *inf = cur_inf (); |
| int old_sc = inf->pause_sc; |
| |
| inf->pause_sc = parse_bool_arg (args, "set task pause"); |
| |
| if (old_sc == 0 && inf->pause_sc != 0) |
| /* If the task is currently unsuspended, immediately suspend it, |
| otherwise wait until the next time it gets control. */ |
| inf_suspend (inf); |
| } |
| |
| static void |
| show_task_pause_cmd (char *args, int from_tty) |
| { |
| struct inf *inf = cur_inf (); |
| |
| check_empty (args, "show task pause"); |
| printf_unfiltered ("The inferior task %s suspended while gdb has control.\n", |
| inf->task |
| ? (inf->pause_sc == 0 ? "isn't" : "is") |
| : (inf->pause_sc == 0 ? "won't be" : "will be")); |
| } |
| |
| static void |
| set_task_detach_sc_cmd (char *args, int from_tty) |
| { |
| cur_inf ()->detach_sc = parse_int_arg (args, |
| "set task detach-suspend-count"); |
| } |
| |
| static void |
| show_task_detach_sc_cmd (char *args, int from_tty) |
| { |
| check_empty (args, "show task detach-suspend-count"); |
| printf_unfiltered ("The inferior task will be left with a " |
| "suspend count of %d when detaching.\n", |
| cur_inf ()->detach_sc); |
| } |
| |
| |
| static void |
| set_thread_default_pause_cmd (char *args, int from_tty) |
| { |
| struct inf *inf = cur_inf (); |
| |
| inf->default_thread_pause_sc = |
| parse_bool_arg (args, "set thread default pause") ? 0 : 1; |
| } |
| |
| static void |
| show_thread_default_pause_cmd (char *args, int from_tty) |
| { |
| struct inf *inf = cur_inf (); |
| int sc = inf->default_thread_pause_sc; |
| |
| check_empty (args, "show thread default pause"); |
| printf_unfiltered ("New threads %s suspended while gdb has control%s.\n", |
| sc ? "are" : "aren't", |
| !sc && inf->pause_sc ? " (but the task is)" : ""); |
| } |
| |
| static void |
| set_thread_default_run_cmd (char *args, int from_tty) |
| { |
| struct inf *inf = cur_inf (); |
| |
| inf->default_thread_run_sc = |
| parse_bool_arg (args, "set thread default run") ? 0 : 1; |
| } |
| |
| static void |
| show_thread_default_run_cmd (char *args, int from_tty) |
| { |
| struct inf *inf = cur_inf (); |
| |
| check_empty (args, "show thread default run"); |
| printf_unfiltered ("New threads %s allowed to run.\n", |
| inf->default_thread_run_sc == 0 ? "are" : "aren't"); |
| } |
| |
| static void |
| set_thread_default_detach_sc_cmd (char *args, int from_tty) |
| { |
| cur_inf ()->default_thread_detach_sc = |
| parse_int_arg (args, "set thread default detach-suspend-count"); |
| } |
| |
| static void |
| show_thread_default_detach_sc_cmd (char *args, int from_tty) |
| { |
| check_empty (args, "show thread default detach-suspend-count"); |
| printf_unfiltered ("New threads will get a detach-suspend-count of %d.\n", |
| cur_inf ()->default_thread_detach_sc); |
| } |
| |
| |
| /* Steal a send right called NAME in the inferior task, and make it PROC's |
| saved exception port. */ |
| static void |
| steal_exc_port (struct proc *proc, mach_port_t name) |
| { |
| error_t err; |
| mach_port_t port; |
| mach_msg_type_name_t port_type; |
| |
| if (!proc || !proc->inf->task) |
| error (_("No inferior task.")); |
| |
| err = mach_port_extract_right (proc->inf->task->port, |
| name, MACH_MSG_TYPE_COPY_SEND, |
| &port, &port_type); |
| if (err) |
| error (_("Couldn't extract send right %d from inferior: %s"), |
| name, safe_strerror (err)); |
| |
| if (proc->saved_exc_port) |
| /* Get rid of our reference to the old one. */ |
| mach_port_deallocate (mach_task_self (), proc->saved_exc_port); |
| |
| proc->saved_exc_port = port; |
| |
| if (!proc->exc_port) |
| /* If PROC is a thread, we may not have set its exception port |
| before. We can't use proc_steal_exc_port because it also sets |
| saved_exc_port. */ |
| { |
| proc->exc_port = proc->inf->event_port; |
| err = proc_set_exception_port (proc, proc->exc_port); |
| error (_("Can't set exception port for %s: %s"), |
| proc_string (proc), safe_strerror (err)); |
| } |
| } |
| |
| static void |
| set_task_exc_port_cmd (char *args, int from_tty) |
| { |
| struct inf *inf = cur_inf (); |
| |
| if (!args) |
| error (_("No argument to \"set task exception-port\" command.")); |
| steal_exc_port (inf->task, parse_and_eval_address (args)); |
| } |
| |
| static void |
| set_stopped_cmd (char *args, int from_tty) |
| { |
| cur_inf ()->stopped = _parse_bool_arg (args, "yes", "no", "set stopped"); |
| } |
| |
| static void |
| show_stopped_cmd (char *args, int from_tty) |
| { |
| struct inf *inf = active_inf (); |
| |
| check_empty (args, "show stopped"); |
| printf_unfiltered ("The inferior process %s stopped.\n", |
| inf->stopped ? "is" : "isn't"); |
| } |
| |
| static void |
| set_sig_thread_cmd (char *args, int from_tty) |
| { |
| struct inf *inf = cur_inf (); |
| |
| if (!args || (!isdigit (*args) && strcmp (args, "none") != 0)) |
| error (_("Illegal argument to \"set signal-thread\" command.\n" |
| "Should be an integer thread ID, or `none'.")); |
| |
| if (strcmp (args, "none") == 0) |
| inf->signal_thread = 0; |
| else |
| { |
| int tid = ptid_get_tid (thread_id_to_pid (atoi (args))); |
| |
| if (tid < 0) |
| error (_("Thread ID %s not known. " |
| "Use the \"info threads\" command to\n" |
| "see the IDs of currently known threads."), args); |
| inf->signal_thread = inf_tid_to_thread (inf, tid); |
| } |
| } |
| |
| static void |
| show_sig_thread_cmd (char *args, int from_tty) |
| { |
| struct inf *inf = active_inf (); |
| |
| check_empty (args, "show signal-thread"); |
| if (inf->signal_thread) |
| printf_unfiltered ("The signal thread is %s.\n", |
| proc_string (inf->signal_thread)); |
| else |
| printf_unfiltered ("There is no signal thread.\n"); |
| } |
| |
| |
| static void |
| set_signals_cmd (char *args, int from_tty) |
| { |
| struct inf *inf = cur_inf (); |
| |
| inf->want_signals = parse_bool_arg (args, "set signals"); |
| |
| if (inf->task && inf->want_signals != inf->traced) |
| /* Make this take effect immediately in a running process. */ |
| inf_set_traced (inf, inf->want_signals); |
| } |
| |
| static void |
| show_signals_cmd (char *args, int from_tty) |
| { |
| struct inf *inf = cur_inf (); |
| |
| check_empty (args, "show signals"); |
| printf_unfiltered ("The inferior process's signals %s intercepted.\n", |
| inf->task |
| ? (inf->traced ? "are" : "aren't") |
| : (inf->want_signals ? "will be" : "won't be")); |
| } |
| |
| static void |
| set_exceptions_cmd (char *args, int from_tty) |
| { |
| struct inf *inf = cur_inf (); |
| int val = parse_bool_arg (args, "set exceptions"); |
| |
| if (inf->task && inf->want_exceptions != val) |
| /* Make this take effect immediately in a running process. */ |
| /* XXX */ ; |
| |
| inf->want_exceptions = val; |
| } |
| |
| static void |
| show_exceptions_cmd (char *args, int from_tty) |
| { |
| struct inf *inf = cur_inf (); |
| |
| check_empty (args, "show exceptions"); |
| printf_unfiltered ("Exceptions in the inferior %s trapped.\n", |
| inf->task |
| ? (inf->want_exceptions ? "are" : "aren't") |
| : (inf->want_exceptions ? "will be" : "won't be")); |
| } |
| |
| |
| static void |
| set_task_cmd (char *args, int from_tty) |
| { |
| printf_unfiltered ("\"set task\" must be followed by the name" |
| " of a task property.\n"); |
| } |
| |
| static void |
| show_task_cmd (char *args, int from_tty) |
| { |
| struct inf *inf = cur_inf (); |
| |
| check_empty (args, "show task"); |
| |
| show_signals_cmd (0, from_tty); |
| show_exceptions_cmd (0, from_tty); |
| show_task_pause_cmd (0, from_tty); |
| |
| if (inf->pause_sc == 0) |
| show_thread_default_pause_cmd (0, from_tty); |
| show_thread_default_run_cmd (0, from_tty); |
| |
| if (inf->task) |
| { |
| show_stopped_cmd (0, from_tty); |
| show_sig_thread_cmd (0, from_tty); |
| } |
| |
| if (inf->detach_sc != 0) |
| show_task_detach_sc_cmd (0, from_tty); |
| if (inf->default_thread_detach_sc != 0) |
| show_thread_default_detach_sc_cmd (0, from_tty); |
| } |
| |
| |
| static void |
| set_noninvasive_cmd (char *args, int from_tty) |
| { |
| /* Invert the sense of the arg for each component. */ |
| char *inv_args = parse_bool_arg (args, "set noninvasive") ? "off" : "on"; |
| |
| set_task_pause_cmd (inv_args, from_tty); |
| set_signals_cmd (inv_args, from_tty); |
| set_exceptions_cmd (inv_args, from_tty); |
| } |
| |
| |
| static void |
| info_port_rights (char *args, mach_port_type_t only) |
| { |
| struct inf *inf = active_inf (); |
| struct value *vmark = value_mark (); |
| |
| if (args) |
| /* Explicit list of port rights. */ |
| { |
| while (*args) |
| { |
| struct value *val = parse_to_comma_and_eval (&args); |
| long right = value_as_long (val); |
| error_t err = |
| print_port_info (right, 0, inf->task->port, PORTINFO_DETAILS, |
| stdout); |
| |
| if (err) |
| error (_("%ld: %s."), right, safe_strerror (err)); |
| } |
| } |
| else |
| /* Print all of them. */ |
| { |
| error_t err = |
| print_task_ports_info (inf->task->port, only, PORTINFO_DETAILS, |
| stdout); |
| if (err) |
| error (_("%s."), safe_strerror (err)); |
| } |
| |
| value_free_to_mark (vmark); |
| } |
| |
| static void |
| info_send_rights_cmd (char *args, int from_tty) |
| { |
| info_port_rights (args, MACH_PORT_TYPE_SEND); |
| } |
| |
| static void |
| info_recv_rights_cmd (char *args, int from_tty) |
| { |
| info_port_rights (args, MACH_PORT_TYPE_RECEIVE); |
| } |
| |
| static void |
| info_port_sets_cmd (char *args, int from_tty) |
| { |
| info_port_rights (args, MACH_PORT_TYPE_PORT_SET); |
| } |
| |
| static void |
| info_dead_names_cmd (char *args, int from_tty) |
| { |
| info_port_rights (args, MACH_PORT_TYPE_DEAD_NAME); |
| } |
| |
| static void |
| info_port_rights_cmd (char *args, int from_tty) |
| { |
| info_port_rights (args, ~0); |
| } |
| |
| |
| static void |
| add_task_commands (void) |
| { |
| add_cmd ("pause", class_run, set_thread_default_pause_cmd, _("\ |
| Set whether the new threads are suspended while gdb has control.\n\ |
| This property normally has no effect because the whole task is\n\ |
| suspended, however, that may be disabled with \"set task pause off\".\n\ |
| The default value is \"off\"."), |
| &set_thread_default_cmd_list); |
| add_cmd ("pause", no_class, show_thread_default_pause_cmd, _("\ |
| Show whether new threads are suspended while gdb has control."), |
| &show_thread_default_cmd_list); |
| |
| add_cmd ("run", class_run, set_thread_default_run_cmd, _("\ |
| Set whether new threads are allowed to run (once gdb has noticed them)."), |
| &set_thread_default_cmd_list); |
| add_cmd ("run", no_class, show_thread_default_run_cmd, _("\ |
| Show whether new threads are allowed to run (once gdb has noticed them)."), |
| &show_thread_default_cmd_list); |
| |
| add_cmd ("detach-suspend-count", class_run, set_thread_default_detach_sc_cmd, |
| _("Set the default detach-suspend-count value for new threads."), |
| &set_thread_default_cmd_list); |
| add_cmd ("detach-suspend-count", no_class, show_thread_default_detach_sc_cmd, |
| _("Show the default detach-suspend-count value for new threads."), |
| &show_thread_default_cmd_list); |
| |
| add_cmd ("signals", class_run, set_signals_cmd, _("\ |
| Set whether the inferior process's signals will be intercepted.\n\ |
| Mach exceptions (such as breakpoint traps) are not affected."), |
| &setlist); |
| add_alias_cmd ("sigs", "signals", class_run, 1, &setlist); |
| add_cmd ("signals", no_class, show_signals_cmd, _("\ |
| Show whether the inferior process's signals will be intercepted."), |
| &showlist); |
| add_alias_cmd ("sigs", "signals", no_class, 1, &showlist); |
| |
| add_cmd ("signal-thread", class_run, set_sig_thread_cmd, _("\ |
| Set the thread that gdb thinks is the libc signal thread.\n\ |
| This thread is run when delivering a signal to a non-stopped process."), |
| &setlist); |
| add_alias_cmd ("sigthread", "signal-thread", class_run, 1, &setlist); |
| add_cmd ("signal-thread", no_class, show_sig_thread_cmd, _("\ |
| Set the thread that gdb thinks is the libc signal thread."), |
| &showlist); |
| add_alias_cmd ("sigthread", "signal-thread", no_class, 1, &showlist); |
| |
| add_cmd ("stopped", class_run, set_stopped_cmd, _("\ |
| Set whether gdb thinks the inferior process is stopped as with SIGSTOP.\n\ |
| Stopped process will be continued by sending them a signal."), |
| &setlist); |
| add_cmd ("stopped", no_class, show_stopped_cmd, _("\ |
| Show whether gdb thinks the inferior process is stopped as with SIGSTOP."), |
| &showlist); |
| |
| add_cmd ("exceptions", class_run, set_exceptions_cmd, _("\ |
| Set whether exceptions in the inferior process will be trapped.\n\ |
| When exceptions are turned off, neither breakpoints nor single-stepping\n\ |
| will work."), |
| &setlist); |
| /* Allow `set exc' despite conflict with `set exception-port'. */ |
| add_alias_cmd ("exc", "exceptions", class_run, 1, &setlist); |
| add_cmd ("exceptions", no_class, show_exceptions_cmd, _("\ |
| Show whether exceptions in the inferior process will be trapped."), |
| &showlist); |
| |
| add_prefix_cmd ("task", no_class, set_task_cmd, |
| _("Command prefix for setting task attributes."), |
| &set_task_cmd_list, "set task ", 0, &setlist); |
| add_prefix_cmd ("task", no_class, show_task_cmd, |
| _("Command prefix for showing task attributes."), |
| &show_task_cmd_list, "show task ", 0, &showlist); |
| |
| add_cmd ("pause", class_run, set_task_pause_cmd, _("\ |
| Set whether the task is suspended while gdb has control.\n\ |
| A value of \"on\" takes effect immediately, otherwise nothing happens\n\ |
| until the next time the program is continued.\n\ |
| When setting this to \"off\", \"set thread default pause on\" can be\n\ |
| used to pause individual threads by default instead."), |
| &set_task_cmd_list); |
| add_cmd ("pause", no_class, show_task_pause_cmd, |
| _("Show whether the task is suspended while gdb has control."), |
| &show_task_cmd_list); |
| |
| add_cmd ("detach-suspend-count", class_run, set_task_detach_sc_cmd, |
| _("Set the suspend count will leave on the thread when detaching."), |
| &set_task_cmd_list); |
| add_cmd ("detach-suspend-count", no_class, show_task_detach_sc_cmd, |
| _("Show the suspend count will leave " |
| "on the thread when detaching."), |
| &show_task_cmd_list); |
| |
| add_cmd ("exception-port", no_class, set_task_exc_port_cmd, _("\ |
| Set the task exception port to which we forward exceptions.\n\ |
| The argument should be the value of the send right in the task."), |
| &set_task_cmd_list); |
| add_alias_cmd ("excp", "exception-port", no_class, 1, &set_task_cmd_list); |
| add_alias_cmd ("exc-port", "exception-port", no_class, 1, |
| &set_task_cmd_list |