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Diffstat (limited to 'gdb/gnu-nat.c')
| -rw-r--r-- | gdb/gnu-nat.c | 3201 |
1 files changed, 0 insertions, 3201 deletions
diff --git a/gdb/gnu-nat.c b/gdb/gnu-nat.c deleted file mode 100644 index 156d981..0000000 --- a/gdb/gnu-nat.c +++ /dev/null @@ -1,3201 +0,0 @@ -/* Interface GDB to the GNU Hurd - Copyright (C) 1992, 1995, 1996, 1997 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 2 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, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. -*/ - -#include <stdio.h> -#include <errno.h> -#include <signal.h> -#include <assert.h> -#include <setjmp.h> -#include <limits.h> -#include <sys/ptrace.h> - -/* We include this because we don't need the access macros and they conflict - with gdb's definitions (ick). This is very non standard! */ -#include <waitflags.h> - -#include <mach.h> -#include <mach/message.h> -#include <mach/notify.h> -#include <mach_error.h> -#include <mach/exception.h> -#include <mach/vm_attributes.h> - -#include <hurd/process.h> -#include <hurd/process_request.h> -#include <hurd/msg.h> -#include <hurd/msg_request.h> -#include <hurd/signal.h> -#include <hurd/interrupt.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 "wait.h" -#include "gdbcmd.h" -#include "gdbcore.h" - -#include "gnu-nat.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 */ - -extern struct target_ops gnu_ops; -extern char *strerror(); - -int inf_update_procs (struct inf *inf); -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); -inline void inf_set_threads_resume_sc (struct inf *inf, - struct proc *run_thread, - int run_others); -inline int inf_set_threads_resume_sc_for_signal_thread (struct inf *inf); -inline void inf_suspend (struct inf *inf); -inline 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 target_signal sig); - -#define inf_debug(_inf, msg, args...) \ - do { struct inf *__inf = (_inf); \ - debug ("{inf %d %p}: " msg, __inf->pid, __inf , ##args); } while (0) - -void proc_abort (struct proc *proc, int force); -thread_state_t proc_get_state (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); -char *proc_string (struct proc *proc); - -/* 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) - -#define MIG_SERVER_DIED EMIG_SERVER_DIED /* XXX */ - -/* 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. */ - 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... */ - int stopped : 1; - - /* True if the inferior is traced. */ - int traced : 1; - - /* True if we shouldn't try waiting for the inferior, usually because we - can't for some reason. */ - 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. */ - { - 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", 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) -{ - 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; - - 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), 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), 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 = malloc (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, 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); - } - - free (proc); - return next; -} - -struct inf *make_inf () -{ - struct inf *inf = malloc (sizeof (struct inf)); - - if (!inf) - return 0; - - 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->stopped = 0; - inf->running = 0; - 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->traced = 0; - inf->no_wait = 0; - inf->stopped = 0; - inf->running = 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", 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, 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) - inf->task->sc = inf->task->cur_sc = 1; /* Reflect task_suspend above */ - } - else - inf->pid = -1; -} - -/* Validates INF's stopped field from the actual proc server state. */ -static void -inf_validate_stopped (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); - 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) -{ - 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, (task_info_t)&info, &info_len); - - if (err) - inf->task->dead = 1; /* oh well */ - else if (inf->task->cur_sc < info.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, 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; - } -} - -/* 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) - 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: 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)); - 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) -{ - int i; - thread_array_t threads; - unsigned num_threads; - 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"); - } - - { - unsigned search_start = 0; /* Make things normally linear. */ - /* 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; - - bzero (matched, sizeof (matched)); - - while (thread) - { - unsigned 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. */ - (last ? last->next : 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! */ - { - thread = make_proc (inf, threads[i], next_thread_id++); - (last ? last->next : inf->threads) = thread; - last = thread; - proc_debug (thread, "new thread: %d", threads[i]); - add_thread (thread->tid); /* Tell GDB's generic thread code. */ - } - - 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. */ -inline 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. */ -inline 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). */ -inline 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. */ -inline 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) -{ - 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. */ -inline 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_set_traced (inf, 0); - if (inf->stopped) - inf_signal (inf, TARGET_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 target_signal sig) -{ - error_t err = 0; - int host_sig = target_signal_to_host (sig); - -#define NAME target_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, strerror (err)); - -#undef NAME -} - -/* The inferior used for all gdb target ops. */ -struct inf *current_inferior = 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 int -gnu_wait (int tid, struct target_waitstatus *status) -{ - 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 = 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); - - 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", 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", 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, 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 == 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! */ - { -#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. */ - bcopy (&inf->wait.status, status, sizeof (*status)); - - thread = inf->wait.thread; - if (thread) - tid = thread->tid; - else - thread = inf_tid_to_thread (inf, tid); - - if (!thread || thread->port == MACH_PORT_NULL) - /* TID is dead; try and find a new thread. */ - if (inf_update_procs (inf) && inf->threads) - tid = inf->threads->tid; /* The first available thread. */ - else - tid = inferior_pid; /* let wait_for_inferior handle exit case */ - - if (thread && tid >= 0 && 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 tid = %d, status = %s (%d)", tid, - 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 tid; -} - -/* 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); - - 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 = TARGET_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 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); - } - 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 = - target_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 = TARGET_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; - } - } - - 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 (__FUNCTION__); -} - -error_t -do_mach_notify_port_deleted (mach_port_t notify, mach_port_t name) -{ - return ill_rpc (__FUNCTION__); -} - -error_t -do_mach_notify_msg_accepted (mach_port_t notify, mach_port_t name) -{ - return ill_rpc (__FUNCTION__); -} - -error_t -do_mach_notify_port_destroyed (mach_port_t notify, mach_port_t name) -{ - return ill_rpc (__FUNCTION__); -} - -error_t -do_mach_notify_send_once (mach_port_t notify) -{ - return ill_rpc (__FUNCTION__); -} - -/* 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 ? 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, 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 (__FUNCTION__); -} - -error_t -S_proc_getmsgport_reply (mach_port_t reply, error_t err, mach_port_t msg_port) -{ - return ill_rpc (__FUNCTION__); -} - -/* 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 = TARGET_SIGNAL_0; - } - else if (err) - warning ("Signal delivery failed: %s", 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 (__FUNCTION__); -} - -/* 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 (int tid, int step, enum target_signal sig) -{ - struct proc *step_thread = 0; - struct inf *inf = current_inferior; - - inf_debug (inf, "tid = %d, step = %d, sig = %d", tid, step, sig); - - if (sig != TARGET_SIGNAL_0 || inf->stopped) - 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), - target_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); - - if (tid < 0) - /* Allow all threads to run, except perhaps single-stepping one. */ - { - inf_debug (inf, "running all threads; tid = %d", inferior_pid); - tid = inferior_pid; /* 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, tid); - 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); - } - - if (step) - { - step_thread = inf_tid_to_thread (inf, 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); - - inf_debug (inf, "here we go..."); - inf_resume (inf); -} - -static void -gnu_kill_inferior () -{ - struct proc *task = current_inferior->task; - if (task) - { - proc_debug (task, "terminating..."); - task_terminate (task->port); - inf_set_pid (current_inferior, -1); - } - target_mourn_inferior (); -} - -/* Clean up after the inferior dies. */ - -static void -gnu_mourn_inferior () -{ - inf_debug (current_inferior, "rip"); - inf_detach (current_inferior); - unpush_target (&gnu_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 () -{ - if (current_inferior->task && current_inferior->threads) - /* The first thread. */ - return current_inferior->threads->tid; - else - /* What may be the next thread. */ - return next_thread_id; -} - -static struct inf * -cur_inf () -{ - if (! current_inferior) - current_inferior = make_inf (); - return current_inferior; -} - -static void -gnu_create_inferior (exec_file, allargs, env) - char *exec_file; - char *allargs; - char **env; -{ - struct inf *inf = cur_inf (); - - 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!"); - } - 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); - - inf_attach (inf, pid); - - attach_flag = 0; - push_target (&gnu_ops); - - inf->pending_execs = 2; - inf->traced = 1; - - /* Now let the child run again, knowing that it will stop immediately - because of the ptrace. */ - inf_resume (inf); - inferior_pid = inf_pick_first_thread (); - - startup_inferior (inf->pending_execs); - - return inferior_pid; - } - - inf_debug (inf, "creating inferior"); - - fork_inferior (exec_file, allargs, env, trace_me, attach_to_child, NULL, NULL); - - 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); - - /* Here we go! */ - proceed ((CORE_ADDR) -1, 0, 0); -} - -/* Mark our target-struct as eligible for stray "run" and "attach" - commands. */ -static int -gnu_can_run () -{ - return 1; -} - -#ifdef ATTACH_DETACH - -/* Attach to process PID, then initialize for debugging it - and wait for the trace-trap that results from attaching. */ -static void -gnu_attach (args, from_tty) - char *args; - int from_tty; -{ - int pid; - char *exec_file; - struct inf *inf = cur_inf (); - - if (!args) - error_no_arg ("PID to attach"); - - pid = atoi (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); - inf_update_procs (inf); - - inferior_pid = inf_pick_first_thread (); - - attach_flag = 1; - push_target (&gnu_ops); - - inf_update_signal_thread (inf); - inf_set_traced (inf, inf->want_signals); - - /* If the process was stopped before we attached, make it continue the next - time the user does a continue. */ - inf_validate_stopped (inf); - -#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 (args, from_tty) - char *args; - int from_tty; -{ - if (from_tty) - { - char *exec_file = get_exec_file (0); - if (exec_file) - printf_unfiltered ("Detaching from program `%s' pid %d\n", - exec_file, current_inferior->pid); - else - printf_unfiltered ("Detaching from pid %d\n", current_inferior->pid); - gdb_flush (gdb_stdout); - } - - inf_detach (current_inferior); - - inferior_pid = 0; - - unpush_target (&gnu_ops); /* Pop out of handling an inferior */ -} -#endif /* ATTACH_DETACH */ - -static void -gnu_terminal_init_inferior () -{ - assert (current_inferior); - terminal_init_inferior_with_pgrp (current_inferior->pid); -} - -/* Get ready to modify the registers array. On machines which store - individual registers, this doesn't need to do anything. On machines - which store all the registers in one fell swoop, this makes sure - that registers contains all the registers from the program being - debugged. */ - -static void -gnu_prepare_to_store () -{ -#ifdef CHILD_PREPARE_TO_STORE - CHILD_PREPARE_TO_STORE (); -#endif -} - -static void -gnu_open (arg, from_tty) - char *arg; - int from_tty; -{ - error ("Use the \"run\" command to start a Unix child process."); -} - -static void -gnu_stop () -{ - error ("to_stop target function not implemented"); -} - -static void -gnu_pid_to_exec_file () -{ - error ("to_pid_to_exec_file target function not implemented"); -} - - -static int -gnu_thread_alive (int tid) -{ - inf_update_procs (current_inferior); - return !!inf_tid_to_thread (current_inferior, tid); -} - -/* - * 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, addr, myaddr, length) - 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", strerror (err)); - length = 0; - } - - err = vm_deallocate (mach_task_self (), copied, copy_count); - if (err) - warning ("gnu_read_inferior vm_deallocate failed: %s", 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, addr, myaddr, length) - 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) - { - boolean_t protection_changed = FALSE; - - 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) - { - boolean_t protection_changed = FALSE; - - 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. */ -static int -gnu_xfer_memory (memaddr, myaddr, len, write, target) - CORE_ADDR memaddr; - char *myaddr; - int len; - int write; - struct target_ops *target; /* IGNORED */ -{ - int result; - task_t task = - current_inferior - ? (current_inferior->task ? current_inferior->task->port : 0) - : 0; - - if (task == MACH_PORT_NULL) - return 0; - else - { - inf_debug (current_inferior, "%s %p[%d] %s %p", - write ? "writing" : "reading", memaddr, len, - write ? "<--" : "-->", myaddr); - if (write) - return gnu_write_inferior (task, memaddr, myaddr, len); - else - return gnu_read_inferior (task, memaddr, myaddr, len); - } -} - -extern void gnu_store_registers (int regno); -extern void gnu_fetch_registers (int regno); - -struct target_ops gnu_ops ; - -static void -init_gnu_ops(void) -{ - gnu_ops.to_shortname = "GNU"; /* to_shortname */ - gnu_ops.to_longname = "GNU Hurd process"; /* to_longname */ - gnu_ops.to_doc = "GNU Hurd process"; /* to_doc */ - gnu_ops.to_open = gnu_open; /* to_open */ - gnu_ops.to_close = 0; /* to_close */ - gnu_ops.to_attach = gnu_attach; /* to_attach */ - gnu_ops.to_post_attach = NULL; - gnu_ops.to_require_attach = NULL; /* to_require_attach */ - gnu_ops.to_detach = gnu_detach; /* to_detach */ - gnu_ops.to_require_detach = NULL; /* to_require_detach */ - gnu_ops.to_resume = gnu_resume; /* to_resume */ - gnu_ops.to_wait = gnu_wait; /* to_wait */ - gnu_ops.to_post_wait = NULL; /* to_post_wait */ - gnu_ops.to_fetch_registers = gnu_fetch_registers; /* to_fetch_registers */ - gnu_ops.to_store_registers = gnu_store_registers; /* to_store_registers */ - gnu_ops.to_prepare_to_store = gnu_prepare_to_store; /* to_prepare_to_store */ - gnu_ops.to_xfer_memory = gnu_xfer_memory; /* to_xfer_memory */ - gnu_ops.to_files_info = 0; /* to_files_info */ - gnu_ops.to_insert_breakpoint = memory_insert_breakpoint; - gnu_ops.to_remove_breakpoint = memory_remove_breakpoint; - gnu_ops.to_terminal_init = gnu_terminal_init_inferior; - gnu_ops.to_terminal_inferior = terminal_inferior; - gnu_ops.to_terminal_ours_for_output = terminal_ours_for_output; - gnu_ops.to_terminal_ours = terminal_ours; - gnu_ops.to_terminal_info = child_terminal_info; - gnu_ops.to_kill = gnu_kill_inferior; /* to_kill */ - gnu_ops.to_load = 0; /* to_load */ - gnu_ops.to_lookup_symbol = 0; /* to_lookup_symbol */ - gnu_ops.to_create_inferior = gnu_create_inferior; /* to_create_inferior */ - gnu_ops.to_post_startup_inferior = NULL; /* to_post_startup_inferior */ - gnu_ops.to_acknowledge_created_inferior = NULL; /* to_acknowledge_created_inferior */ - gnu_ops.to_clone_and_follow_inferior = NULL; /* to_clone_and_follow_inferior */ - gnu_ops.to_post_follow_inferior_by_clone = NULL; /* to_post_follow_inferior_by_clone */ - gnu_ops.to_insert_fork_catchpoint = NULL; - gnu_ops.to_remove_fork_catchpoint = NULL; - gnu_ops.to_insert_vfork_catchpoint = NULL; - gnu_ops.to_remove_vfork_catchpoint = NULL; - gnu_ops.to_has_forked = NULL; /* to_has_forked */ - gnu_ops.to_has_vforked = NULL; /* to_has_vforked */ - gnu_ops.to_can_follow_vfork_prior_to_exec = NULL; - gnu_ops.to_post_follow_vfork = NULL; /* to_post_follow_vfork */ - gnu_ops.to_insert_exec_catchpoint = NULL; - gnu_ops.to_remove_exec_catchpoint = NULL; - gnu_ops.to_has_execd = NULL; - gnu_ops.to_reported_exec_events_per_exec_call = NULL; - gnu_ops.to_has_exited = NULL; - gnu_ops.to_mourn_inferior = gnu_mourn_inferior; /* to_mourn_inferior */ - gnu_ops.to_can_run = gnu_can_run; /* to_can_run */ - gnu_ops.to_notice_signals = 0; /* to_notice_signals */ - gnu_ops.to_thread_alive = gnu_thread_alive;/* to_thread_alive */ - gnu_ops.to_stop = gnu_stop; /* to_stop */ - gnu_ops.to_pid_to_exec_file = gnu_pid_to_exec_file; /* to_pid_to_exec_file */ - gnu_ops.to_core_file_to_sym_file = NULL; - gnu_ops.to_stratum = process_stratum; /* to_stratum */ - gnu_ops.DONT_USE = 0; /* to_next */ - gnu_ops.to_has_all_memory = 1; /* to_has_all_memory */ - gnu_ops.to_has_memory = 1; /* to_has_memory */ - gnu_ops.to_has_stack = 1; /* to_has_stack */ - gnu_ops.to_has_registers = 1; /* to_has_registers */ - gnu_ops.to_has_execution = 1; /* to_has_execution */ - gnu_ops.to_sections = 0; /* sections */ - gnu_ops.to_sections_end = 0; /* sections_end */ - gnu_ops.to_magic = OPS_MAGIC ; /* to_magic */ -} /* init_gnu_ops */ - -/* 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, pid_to_thread_id (proc->tid)); - return tid_str; -} - -char * -gnu_target_pid_to_str (int tid) -{ - struct inf *inf = current_inferior; - 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; - } -} - -/* 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 () -{ - struct inf *inf = cur_inf (); - struct proc *thread = inf_tid_to_thread (inf, inferior_pid); - 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 () -{ - 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, 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), 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) -{ - int tid; - 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 = 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) -{ - 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) -{ - 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 (); - 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, - "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_signals_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\n" - "happens until the next time the program is continued.\n" - "When setting this to \"off\", \"set thread default pause on\"\n" - "can be 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); - - /* 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); -} - - -static void -set_thread_pause_cmd (char *args, int from_tty) -{ - struct proc *thread = cur_thread (); - int old_sc = thread->pause_sc; - thread->pause_sc = parse_bool_arg (args, "set thread pause"); - if (old_sc == 0 && thread->pause_sc != 0 && thread->inf->pause_sc == 0) - /* If the task is currently unsuspended, immediately suspend it, - otherwise wait until the next time it gets control. */ - inf_suspend (thread->inf); -} - -static void -show_thread_pause_cmd (char *args, int from_tty) -{ - struct proc *thread = cur_thread (); - int sc = thread->pause_sc; - check_empty (args, "show task pause"); - 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)" : ""); -} - -static void -set_thread_run_cmd (char *args, int from_tty) -{ - struct proc *thread = cur_thread (); - thread->run_sc = parse_bool_arg (args, "set thread run") ? 0 : 1; -} - -static void -show_thread_run_cmd (char *args, int from_tty) -{ - struct proc *thread = cur_thread (); - check_empty (args, "show thread 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 (); - if (!args) - error ("No argument to \"set thread exception-port\" command."); - steal_exc_port (thread, parse_and_eval_address (args)); -} - -#if 0 -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); -} -#endif - -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 () -{ - add_prefix_cmd ("thread", no_class, set_thread_cmd, - "Command prefix for setting thread properties.", - &set_thread_cmd_list, "set thread ", 0, &setlist); - add_prefix_cmd ("default", no_class, show_thread_cmd, - "Command prefix for setting default thread properties.", - &set_thread_default_cmd_list, "set thread default ", 0, - &set_thread_cmd_list); - add_prefix_cmd ("thread", no_class, set_thread_default_cmd, - "Command prefix for showing thread properties.", - &show_thread_cmd_list, "show thread ", 0, &showlist); - add_prefix_cmd ("default", no_class, show_thread_default_cmd, - "Command prefix for showing default thread properties.", - &show_thread_default_cmd_list, "show thread default ", 0, - &show_thread_cmd_list); - - add_cmd ("pause", class_run, set_thread_pause_cmd, - "Set whether the current thread is suspended while gdb has control.\n" - "A value of \"on\" takes effect immediately, otherwise nothing\n" - "happens until the next time the program is continued. This\n" - "property normally has no effect because the whole task is suspended,\n" - "however, that may be disabled with \"set task pause off\".\n" - "The default value is \"off\".", - &set_thread_cmd_list); - add_cmd ("pause", no_class, show_thread_pause_cmd, - "Show whether the current thread is suspended while gdb has control.", - &show_thread_cmd_list); - - add_cmd ("run", class_run, set_thread_run_cmd, - "Set whether the current thread is allowed to run.", - &set_thread_cmd_list); - add_cmd ("run", no_class, show_thread_run_cmd, - "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" - "The argument should be the value of the send right in the task.", - &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 -_initialize_gnu_nat () -{ - proc_server = getproc (); - init_gnu_ops() ; - add_target (&gnu_ops); - add_task_commands (); - add_thread_commands (); - -#if MAINTENANCE_CMDS - add_set_cmd ("gnu-debug", class_maintenance, - var_boolean, (char *)&gnu_debug_flag, - "Set debugging output for the gnu backend.", &maintenancelist); -#endif -} - -#ifdef FLUSH_INFERIOR_CACHE - -/* When over-writing code on some machines the I-Cache must be flushed - explicitly, because it is not kept coherent by the lazy hardware. - This definitely includes breakpoints, for instance, or else we - end up looping in mysterious Bpt traps */ - -void -flush_inferior_icache(pc, amount) - CORE_ADDR pc; -{ - vm_machine_attribute_val_t flush = MATTR_VAL_ICACHE_FLUSH; - error_t ret; - - ret = vm_machine_attribute (current_inferior->task->port, - pc, - amount, - MATTR_CACHE, - &flush); - if (ret != KERN_SUCCESS) - warning ("Error flushing inferior's cache : %s", strerror (ret)); -} -#endif FLUSH_INFERIOR_CACHE |