diff options
Diffstat (limited to 'gdb/gnu-nat.c')
| -rw-r--r-- | gdb/gnu-nat.c | 479 |
1 files changed, 383 insertions, 96 deletions
diff --git a/gdb/gnu-nat.c b/gdb/gnu-nat.c index 2d9cbed..55953c0 100644 --- a/gdb/gnu-nat.c +++ b/gdb/gnu-nat.c @@ -49,6 +49,8 @@ #include <hurd/interrupt.h> #include <hurd/sigpreempt.h> +#include <portinfo.h> + #include "defs.h" #include "inferior.h" #include "symtab.h" @@ -217,10 +219,14 @@ struct inf (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 @@ -255,7 +261,7 @@ proc_update_sc (struct proc *proc) assert (proc_is_thread (proc)); proc_debug (proc, "storing back changed thread state"); err = thread_set_state (proc->port, THREAD_STATE_FLAVOR, - &proc->state, THREAD_STATE_SIZE); + (thread_state_t)&proc->state, THREAD_STATE_SIZE); if (! err) proc->state_changed = 0; } @@ -353,7 +359,7 @@ proc_get_state (struct proc *proc, int will_modify) mach_msg_type_number_t state_size = THREAD_STATE_SIZE; error_t err = thread_get_state (proc->port, THREAD_STATE_FLAVOR, - &proc->state, &state_size); + (thread_state_t)&proc->state, &state_size); proc_debug (proc, "getting thread state"); proc->state_valid = !err; } @@ -362,7 +368,7 @@ proc_get_state (struct proc *proc, int will_modify) { if (will_modify) proc->state_changed = 1; - return &proc->state; + return (thread_state_t)&proc->state; } else return 0; @@ -524,12 +530,19 @@ make_proc (struct inf *inf, mach_port_t port, int tid) 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; @@ -623,8 +636,10 @@ struct inf *make_inf () 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 */ @@ -733,8 +748,9 @@ inf_validate_stopped (struct inf *inf) 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, 0, + proc_getprocinfo (proc_server, inf->pid, &info_flags, (procinfo_t *)&pi, &pi_len, &noise, &noise_len); if (! err) @@ -746,17 +762,31 @@ inf_validate_stopped (struct inf *inf) } } -/* Validates INF's task suspend count. */ +/* 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) { struct task_basic_info info; mach_msg_type_number_t info_len = TASK_BASIC_INFO_COUNT; - error_t err = task_info (inf->task->port, TASK_BASIC_INFO, &info, &info_len); - if (! err) + error_t err = + task_info (inf->task->port, TASK_BASIC_INFO, (task_info_t)&info, &info_len); + + if (err) + inf->task->dead = 1; /* oh well */ + else if (inf->task->cur_sc < info.suspend_count) { - if (inf->task->cur_sc < info.suspend_count) - warning ("Pid %d is suspended; continuing will clear existing suspend count.", inf->pid); + int abort; + + target_terminal_ours (); /* Allow I/O. */ + abort = + !query ("Pid %d has an additional task suspend count of %d; clear it? ", + inf->pid, info.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 = info.suspend_count; } } @@ -768,16 +798,20 @@ void inf_set_traced (struct inf *inf, int on) { if (on != inf->traced) - if (inf->task) + if (inf->task && !inf->task->dead) /* Make it take effect immediately. */ { - error_t (*f)(mach_port_t, mach_port_t, int) = - on ? msg_set_some_exec_flags : msg_clear_some_exec_flags; + sigset_t mask = on ? ~(sigset_t)0 : 0; error_t err = - INF_RESUME_MSGPORT_RPC (inf, (*f)(msgport, refport, EXEC_TRACED)); + INF_RESUME_MSGPORT_RPC (inf, msg_set_init_int (msgport, refport, + INIT_TRACEMASK, mask)); if (err == EIEIO) - warning ("Can't modify tracing state for pid %d: No signal thread", - inf->pid); + { + if (on) + warning ("Can't modify tracing state for pid %d: No signal thread", + inf->pid); + inf->traced = on; + } else if (err) warning ("Can't modify tracing state for pid %d: %s", inf->pid, strerror (err)); @@ -875,7 +909,11 @@ inf_validate_procs (struct inf *inf) unsigned num_threads; struct proc *task = inf->task; - inf->threads_up_to_date = !inf->running; + /* 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) { @@ -884,9 +922,8 @@ inf_validate_procs (struct inf *inf) if (err) /* TASK must be dead. */ { - task->port = MACH_PORT_NULL; - _proc_free (task); - task = inf->task = 0; + task->dead = 1; + task = 0; } } @@ -996,7 +1033,14 @@ inf_resume (struct inf *inf) thread->sc = thread->resume_sc; if (inf->task) - inf->task->sc = 0; + { + 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); } @@ -1087,12 +1131,12 @@ inf_detach (struct inf *inf) inf_signal (inf, TARGET_SIGNAL_0); proc_restore_exc_port (task); - task->sc = 0; + task->sc = inf->detach_sc; for (thread = inf->threads; thread; thread = thread->next) { proc_restore_exc_port (thread); - thread->sc = 0; + thread->sc = thread->detach_sc; } inf_update_suspends (inf); @@ -1188,7 +1232,7 @@ inf_signal (struct inf *inf, enum target_signal sig) e->exception, e->code, e->subcode); } else - warning ("Can't forward spontaneous exception (%s).", NAME); + error ("Can't forward spontaneous exception (%s).", NAME); } else /* A Unix signal. */ @@ -1202,7 +1246,7 @@ inf_signal (struct inf *inf, enum target_signal sig) msg_sig_post_untraced_request (msgport, inf->event_port, MACH_MSG_TYPE_MAKE_SEND_ONCE, - host_sig, + host_sig, 0, refport)); if (! err) /* Posting an untraced signal automatically continues it. @@ -1220,9 +1264,8 @@ inf_signal (struct inf *inf, enum target_signal sig) { 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, refport)); + INF_RESUME_MSGPORT_RPC (inf, msg_sig_post_untraced (msgport, + host_sig, 0, refport)); } if (err == EIEIO) @@ -1254,6 +1297,18 @@ gnu_wait (int tid, struct target_waitstatus *status) struct proc *thread; struct inf *inf = current_inferior; + 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: %d", tid); @@ -1269,7 +1324,7 @@ gnu_wait (int tid, struct target_waitstatus *status) 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); + interrupt_operation (proc_server, 0); } err = @@ -1294,14 +1349,14 @@ gnu_wait (int tid, struct target_waitstatus *status) (3) wait reply from the proc server. */ inf_debug (inf, "waiting for an event..."); - err = _hurd_intr_rpc_mach_msg (&msg.hdr, MACH_RCV_MSG, 0, - sizeof (struct msg), - inf->event_port, MACH_PORT_NULL); + 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 (err == EINTR) + if (err == EMACH_RCV_INTERRUPTED) inf_debug (inf, "interrupted"); else if (err) error ("Couldn't wait for an event: %s", strerror (err)); @@ -1339,17 +1394,25 @@ gnu_wait (int tid, struct target_waitstatus *status) /* 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; + { + 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 == TARGET_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! */ - { - prune_threads (1); /* Get rid of the old shell threads */ - renumber_threads (0); /* Give our threads reasonable names. */ - } + { + if (--inf->pending_execs == 0) + /* We're done! */ + { + prune_threads (1); /* Get rid of the old shell threads */ + renumber_threads (0); /* Give our threads reasonable names. */ + } + inf_debug (inf, "pending exec completed, pending_execs => %d", + inf->pending_execs); + } } if (inf->wait.suppress) @@ -1442,9 +1505,15 @@ S_exception_raise_request (mach_port_t port, mach_port_t reply_port, /* Record the exception so that we can forward it later. */ { if (thread->exc_port == port) - inf->wait.exc.handler = thread->saved_exc_port; + { + inf_debug (waiting_inf, "Handler is thread exeption port <%d>", + thread->saved_exc_port); + inf->wait.exc.handler = thread->saved_exc_port; + } else { + inf_debug (waiting_inf, "Handler is task exeption port <%d>", + inf->task->saved_exc_port); inf->wait.exc.handler = inf->task->saved_exc_port; assert (inf->task->exc_port == port); } @@ -1484,9 +1553,8 @@ inf_task_died_status (struct inf *inf) inf->wait.status.kind = TARGET_WAITKIND_SIGNALLED; inf->wait.status.value.sig = TARGET_SIGNAL_KILL; } - -/* Notify server routines. The only real one is dead name notification. */ +/* 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) { @@ -1522,7 +1590,7 @@ do_mach_notify_dead_name (mach_port_t notify, mach_port_t dead_port) return 0; } - + static error_t ill_rpc (char *fun) { @@ -1564,12 +1632,12 @@ do_mach_notify_send_once (mach_port_t notify) error_t S_proc_wait_reply (mach_port_t reply, error_t err, - int status, rusage_t rusage, pid_t pid) + 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", - err ? strerror (err) : "0", pid, status); + inf_debug (inf, "err = %s, pid = %d, status = 0x%x, sigcode = %d", + err ? 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 @@ -1606,10 +1674,6 @@ S_proc_wait_reply (mach_port_t reply, error_t err, { inf_debug (inf, "process has stopped itself"); inf->stopped = 1; - - /* We recheck the task suspend count here because the crash server - messes with it in an unfriendly way, right before `stopping'. */ - inf_validate_task_sc (inf); } } else @@ -1724,6 +1788,8 @@ gnu_resume (int tid, int step, enum target_signal sig) the process, as we're just going to stop it right away anyway. */ return; + inf_update_procs (inf); + if (tid < 0) /* Allow all threads to run, except perhaps single-stepping one. */ { @@ -1735,8 +1801,8 @@ gnu_resume (int tid, int step, enum target_signal sig) /* Just allow a single thread to run. */ { struct proc *thread = inf_tid_to_thread (inf, tid); - assert (thread); - + if (! thread) + error ("Can't run single thread id %d: no such thread!"); inf_debug (inf, "running one thread: %d/%d", inf->pid, thread->tid); inf_set_threads_resume_sc (inf, thread, 0); } @@ -1744,8 +1810,10 @@ gnu_resume (int tid, int step, enum target_signal sig) if (step) { step_thread = inf_tid_to_thread (inf, tid); - assert (step_thread); - inf_debug (inf, "stepping thread: %d/%d", inf->pid, step_thread->tid); + if (! step_thread) + warning ("Can't step thread id %d: no such thread.", tid); + else + inf_debug (inf, "stepping thread: %d/%d", inf->pid, step_thread->tid); } if (step_thread != inf->step_thread) inf_set_step_thread (inf, step_thread); @@ -1762,8 +1830,7 @@ gnu_kill_inferior () { proc_debug (task, "terminating..."); task_terminate (task->port); - task->port = MACH_PORT_NULL; - inf_validate_procs (current_inferior); /* Clear out the thread list &c */ + inf_set_task (current_inferior, MACH_PORT_NULL); } target_mourn_inferior (); } @@ -1813,9 +1880,10 @@ gnu_create_inferior (exec_file, allargs, env) { /* We're in the child; make this process stop as soon as it execs. */ inf_debug (inf, "tracing self"); - ptrace (PTRACE_TRACEME, 0, 0, 0); + if (ptrace (PTRACE_TRACEME) != 0) + error ("ptrace (PTRACE_TRACEME) failed!"); } - void attach_to_child (int pid) + int attach_to_child (int pid) { /* Attach to the now stopped child, which is actually a shell... */ inf_debug (inf, "attaching to child: %d", pid); @@ -1834,6 +1902,8 @@ gnu_create_inferior (exec_file, allargs, env) inf_resume (inf); startup_inferior (pid, inf->pending_execs); + + return pid; } inf_debug (inf, "creating inferior"); @@ -1912,7 +1982,8 @@ gnu_attach (args, from_tty) /* If the process was stopped before we attached, make it continue the next time the user does a continue. */ inf_validate_stopped (inf); - inf_validate_task_sc (inf); + + renumber_threads (0); /* Give our threads reasonable names. */ } /* Take a program previously attached to and detaches it. @@ -2320,6 +2391,19 @@ extern struct cmd_list_element *set_thread_default_cmd_list; extern struct cmd_list_element *show_thread_default_cmd_list; 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) @@ -2352,6 +2436,16 @@ cur_thread () return thread; } +/* Returns the current inferior, but signals an error if it has no task. */ +static struct inf * +active_inf () +{ + 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) { @@ -2378,6 +2472,20 @@ show_task_pause_cmd (char *args, int from_tty) } 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 (); @@ -2393,7 +2501,7 @@ show_thread_default_pause_cmd (char *args, int from_tty) 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)" : ""); + !sc && inf->pause_sc ? " (but the task is)" : ""); } static void @@ -2413,6 +2521,21 @@ show_thread_default_run_cmd (char *args, int from_tty) 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 @@ -2448,7 +2571,7 @@ steal_exc_port (struct proc *proc, mach_port_t name) proc_string (proc), strerror (err)); } } - + static void set_task_exc_port_cmd (char *args, int from_tty) { @@ -2459,30 +2582,6 @@ set_task_exc_port_cmd (char *args, int from_tty) } static void -set_signals_cmd (char *args, int from_tty) -{ - int trace; - 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_stopped_cmd (char *args, int from_tty) { cur_inf ()->stopped = _parse_bool_arg (args, "yes", "no", "set stopped"); @@ -2491,10 +2590,8 @@ set_stopped_cmd (char *args, int from_tty) static void show_stopped_cmd (char *args, int from_tty) { - struct inf *inf = cur_inf (); + struct inf *inf = active_inf (); check_empty (args, "show stopped"); - if (! inf->task) - error ("No current process."); printf_unfiltered ("The inferior process %s stopped.\n", inf->stopped ? "is" : "isn't"); } @@ -2524,16 +2621,38 @@ set_sig_thread_cmd (char *args, int from_tty) static void show_sig_thread_cmd (char *args, int from_tty) { - struct inf *inf = cur_inf (); + struct inf *inf = active_inf (); check_empty (args, "show signal-thread"); - if (! inf->task) - error ("No current process."); 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) +{ + int trace; + 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) @@ -2558,7 +2677,7 @@ show_exceptions_cmd (char *args, int from_tty) ? (inf->want_exceptions ? "are" : "aren't") : (inf->want_exceptions ? "will be" : "won't be")); } - + static void set_task_cmd (char *args, int from_tty) { @@ -2585,8 +2704,83 @@ show_task_cmd (char *args, int from_tty) 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 (); + value_ptr vmark = value_mark (); + + if (args) + /* Explicit list of port rights. */ + { + while (*args) + { + value_ptr 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, 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.", 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 () { add_cmd ("pause", class_run, set_thread_default_pause_cmd, @@ -2605,6 +2799,12 @@ static void add_task_commands () "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" @@ -2645,8 +2845,6 @@ them).", "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); @@ -2664,6 +2862,12 @@ them).", 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" @@ -2671,12 +2875,41 @@ them).", &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); + + /* A convenient way of turning on all options require to noninvasively + debug running tasks. */ + add_cmd ("noninvasive", no_class, set_noninvasive_cmd, + "Set task options so that we interfere as little as possible.\n" + "This is the same as setting `task pause', `exceptions', and" + "`signals' to the opposite value.", + &setlist); + + /* Commands to show information about the task's ports. */ + add_cmd ("send-rights", class_info, info_send_rights_cmd, + "Show information about the task's send rights", + &infolist); + add_cmd ("receive-rights", class_info, info_recv_rights_cmd, + "Show information about the task's receive rights", + &infolist); + add_cmd ("port-rights", class_info, info_send_rights_cmd, + "Show information about the task's port rights", + &infolist); + add_cmd ("port-sets", class_info, info_port_sets_cmd, + "Show information about the task's port sets", + &infolist); + add_cmd ("dead-names", class_info, info_dead_names_cmd, + "Show information about the task's dead names", + &infolist); + add_info_alias ("ports", "port-rights", 1); + add_info_alias ("port", "port-rights", 1); + add_info_alias ("psets", "port-sets", 1); } /* User thread commands. */ extern struct cmd_list_element *set_thread_cmd_list; extern struct cmd_list_element *show_thread_cmd_list; +extern struct cmd_list_element *thread_cmd_list; static void set_thread_pause_cmd (char *args, int from_tty) @@ -2699,7 +2932,7 @@ show_thread_pause_cmd (char *args, int from_tty) printf_unfiltered ("Thread %s %s suspended while gdb has control%s.\n", proc_string (thread), sc ? "is" : "isn't", - !sc && thread->inf->pause_sc ? "(but the task is)" : ""); + !sc && thread->inf->pause_sc ? " (but the task is)" : ""); } static void @@ -2714,12 +2947,28 @@ show_thread_run_cmd (char *args, int from_tty) { struct proc *thread = cur_thread (); check_empty (args, "show thread run"); - printf_unfiltered ("Thread %s allowed to run.", + printf_unfiltered ("Thread %s %s allowed to run.", proc_string (thread), thread->run_sc == 0 ? "is" : "isn't"); } static void +set_thread_detach_sc_cmd (char *args, int from_tty) +{ + cur_thread ()->detach_sc = parse_int_arg (args, "set thread detach-suspend-count"); +} + +static void +show_thread_detach_sc_cmd (char *args, int from_tty) +{ + struct proc *thread = cur_thread (); + check_empty (args, "show thread detach-suspend-count"); + printf_unfiltered ("Thread %s will be left with a suspend count of %d when detaching.\n", + proc_string (thread), + thread->detach_sc); +} + +static void set_thread_exc_port_cmd (char *args, int from_tty) { struct proc *thread = cur_thread (); @@ -2737,9 +2986,30 @@ set_thread_cmd (char *args, int from_tty) static void show_thread_cmd (char *args, int from_tty) { + struct proc *thread = cur_thread (); check_empty (args, "show thread"); show_thread_run_cmd (0, from_tty); show_thread_pause_cmd (0, from_tty); + if (thread->detach_sc != 0) + show_thread_detach_sc_cmd (0, from_tty); +} + +static void +thread_takeover_sc_cmd (char *args, int from_tty) +{ + struct proc *thread = cur_thread (); + thread_basic_info_data_t _info; + thread_basic_info_t info = &_info; + mach_msg_type_number_t info_len = THREAD_BASIC_INFO_COUNT; + error_t err = + thread_info (thread->port, THREAD_BASIC_INFO, (int *)&info, &info_len); + if (err) + error ("%s.", strerror (err)); + thread->sc = info->suspend_count; + if (from_tty) + printf_unfiltered ("Suspend count was %d.\n", thread->sc); + if (info != &_info) + vm_deallocate (mach_task_self (), (vm_address_t)info, info_len * sizeof (int)); } add_thread_commands () @@ -2763,6 +3033,17 @@ add_thread_commands () "Show whether the current thread is allowed to run.", &show_thread_cmd_list); + add_cmd ("detach-suspend-count", class_run, set_thread_detach_sc_cmd, + "Set the suspend count will leave on the thread when detaching.\n" + "Note that this is relative to suspend count when gdb noticed the thread;\n" + "use the `thread takeover-suspend-count' to force it to an absolute value.", + &set_thread_cmd_list); + add_cmd ("detach-suspend-count", no_class, show_thread_detach_sc_cmd, + "Show the suspend count will leave on the thread when detaching." + "Note that this is relative to suspend count when gdb noticed the thread;\n" + "use the `thread takeover-suspend-count' to force it to an absolute value.", + &show_thread_cmd_list); + add_cmd ("exception-port", no_class, set_thread_exc_port_cmd, "Set the exception port to which we forward exceptions for the\n" "current thread, overriding the task exception port.\n" @@ -2770,6 +3051,12 @@ add_thread_commands () &set_thread_cmd_list); add_alias_cmd ("excp", "exception-port", no_class, 1, &set_thread_cmd_list); add_alias_cmd ("exc-port", "exception-port", no_class, 1, &set_thread_cmd_list); + + add_cmd ("takeover-suspend-count", no_class, thread_takeover_sc_cmd, + "Force the threads absolute suspend-count to be gdb's.\n" + "Prior to giving this command, gdb's thread suspend-counts are relative to\n" + "the thread's initial suspend-count when gdb notices the threads.", + &thread_cmd_list); } void |