3410 lines
96 KiB
C
3410 lines
96 KiB
C
/* Interface GDB to the GNU Hurd.
|
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Copyright 1992, 1995, 1996, 1997, 1998, 1999, 2000, 2001
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Free Software Foundation, Inc.
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This file is part of GDB.
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Written by Miles Bader <miles@gnu.ai.mit.edu>
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Some code and ideas from m3-nat.c by Jukka Virtanen <jtv@hut.fi>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
|
||
(at your option) any later version.
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||
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||
This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
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||
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||
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,
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Boston, MA 02111-1307, USA.
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*/
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#include <ctype.h>
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#include <errno.h>
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#include <limits.h>
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#include <setjmp.h>
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#include <signal.h>
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#include <stdio.h>
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#include "gdb_string.h"
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#include <sys/ptrace.h>
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#include <mach.h>
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#include <mach_error.h>
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#include <mach/exception.h>
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#include <mach/message.h>
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#include <mach/notify.h>
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#include <mach/vm_attributes.h>
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#include <hurd.h>
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#include <hurd/interrupt.h>
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#include <hurd/msg.h>
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#include <hurd/msg_request.h>
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#include <hurd/process.h>
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#include <hurd/process_request.h>
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#include <hurd/signal.h>
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#include <hurd/sigpreempt.h>
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#include <portinfo.h>
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#include "defs.h"
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#include "inferior.h"
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#include "symtab.h"
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||
#include "value.h"
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||
#include "language.h"
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||
#include "target.h"
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||
#include "gdb_wait.h"
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||
#include "gdbcmd.h"
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#include "gdbcore.h"
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#include "gdbthread.h"
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#include "gdb_assert.h"
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#include "gdb_obstack.h"
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#include "gnu-nat.h"
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#include "exc_request_S.h"
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#include "notify_S.h"
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#include "process_reply_S.h"
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#include "msg_reply_S.h"
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#include "exc_request_U.h"
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#include "msg_U.h"
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static process_t proc_server = MACH_PORT_NULL;
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/* If we've sent a proc_wait_request to the proc server, the pid of the
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||
process we asked about. We can only ever have one outstanding. */
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int proc_wait_pid = 0;
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/* The number of wait requests we've sent, and expect replies from. */
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int proc_waits_pending = 0;
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int gnu_debug_flag = 0;
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/* Forward decls */
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extern struct target_ops gnu_ops;
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||
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struct inf *make_inf ();
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||
void inf_clear_wait (struct inf *inf);
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||
void inf_cleanup (struct inf *inf);
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||
void inf_startup (struct inf *inf, int pid);
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int inf_update_suspends (struct inf *inf);
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void inf_set_pid (struct inf *inf, pid_t pid);
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void inf_validate_procs (struct inf *inf);
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void inf_steal_exc_ports (struct inf *inf);
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void inf_restore_exc_ports (struct inf *inf);
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||
struct proc *inf_tid_to_proc (struct inf *inf, int tid);
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||
void inf_set_threads_resume_sc (struct inf *inf,
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struct proc *run_thread,
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||
int run_others);
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||
int inf_set_threads_resume_sc_for_signal_thread (struct inf *inf);
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void inf_suspend (struct inf *inf);
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||
void inf_resume (struct inf *inf);
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||
void inf_set_step_thread (struct inf *inf, struct proc *proc);
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||
void inf_detach (struct inf *inf);
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||
void inf_attach (struct inf *inf, int pid);
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||
void inf_signal (struct inf *inf, enum target_signal sig);
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||
void inf_continue (struct inf *inf);
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#define inf_debug(_inf, msg, args...) \
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do { struct inf *__inf = (_inf); \
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debug ("{inf %d %p}: " msg, __inf->pid, __inf , ##args); } while (0)
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|
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void proc_abort (struct proc *proc, int force);
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||
struct proc *make_proc (struct inf *inf, mach_port_t port, int tid);
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||
struct proc *_proc_free (struct proc *proc);
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||
int proc_update_sc (struct proc *proc);
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||
error_t proc_get_exception_port (struct proc *proc, mach_port_t * port);
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||
error_t proc_set_exception_port (struct proc *proc, mach_port_t port);
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static mach_port_t _proc_get_exc_port (struct proc *proc);
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void proc_steal_exc_port (struct proc *proc, mach_port_t exc_port);
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||
void proc_restore_exc_port (struct proc *proc);
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int proc_trace (struct proc *proc, int set);
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||
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||
/* Evaluate RPC_EXPR in a scope with the variables MSGPORT and REFPORT bound
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to INF's msg port and task port respectively. If it has no msg port,
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EIEIO is returned. INF must refer to a running process! */
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#define INF_MSGPORT_RPC(inf, rpc_expr) \
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HURD_MSGPORT_RPC (proc_getmsgport (proc_server, inf->pid, &msgport), \
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(refport = inf->task->port, 0), 0, \
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msgport ? (rpc_expr) : EIEIO)
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/* Like INF_MSGPORT_RPC, but will also resume the signal thread to ensure
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there's someone around to deal with the RPC (and resuspend things
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afterwards). This effects INF's threads' resume_sc count. */
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#define INF_RESUME_MSGPORT_RPC(inf, rpc_expr) \
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(inf_set_threads_resume_sc_for_signal_thread (inf) \
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||
? ({ error_t __e; \
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inf_resume (inf); \
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__e = INF_MSGPORT_RPC (inf, rpc_expr); \
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inf_suspend (inf); \
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__e; }) \
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: EIEIO)
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/* The state passed by an exception message. */
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||
struct exc_state
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{
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||
int exception; /* The exception code */
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int code, subcode;
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||
mach_port_t handler; /* The real exception port to handle this. */
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mach_port_t reply; /* The reply port from the exception call. */
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||
};
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||
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||
/* The results of the last wait an inf did. */
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||
struct inf_wait
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{
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||
struct target_waitstatus status; /* The status returned to gdb. */
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||
struct exc_state exc; /* The exception that caused us to return. */
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||
struct proc *thread; /* The thread in question. */
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||
int suppress; /* Something trivial happened. */
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||
};
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/* The state of an inferior. */
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struct inf
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{
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/* Fields describing the current inferior. */
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struct proc *task; /* The mach task. */
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struct proc *threads; /* A linked list of all threads in TASK. */
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||
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/* True if THREADS needn't be validated by querying the task. We assume that
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||
we and the task in question are the only ones frobbing the thread list,
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so as long as we don't let any code run, we don't have to worry about
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THREADS changing. */
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int threads_up_to_date;
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pid_t pid; /* The real system PID. */
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struct inf_wait wait; /* What to return from target_wait. */
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/* One thread proc in INF may be in `single-stepping mode'. This is it. */
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struct proc *step_thread;
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/* The thread we think is the signal thread. */
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struct proc *signal_thread;
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mach_port_t event_port; /* Where we receive various msgs. */
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/* True if we think at least one thread in the inferior could currently be
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running. */
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unsigned int running:1;
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/* True if the process has stopped (in the proc server sense). Note that
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since a proc server `stop' leaves the signal thread running, the inf can
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be RUNNING && STOPPED... */
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unsigned int stopped:1;
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/* True if the inferior has no message port. */
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unsigned int nomsg:1;
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/* True if the inferior is traced. */
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unsigned int traced:1;
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/* True if we shouldn't try waiting for the inferior, usually because we
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||
can't for some reason. */
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unsigned int no_wait:1;
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/* When starting a new inferior, we don't try to validate threads until all
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the proper execs have been done. This is a count of how many execs we
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expect to happen. */
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unsigned pending_execs;
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/* Fields describing global state */
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/* The task suspend count used when gdb has control. This is normally 1 to
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make things easier for us, but sometimes (like when attaching to vital
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system servers) it may be desirable to let the task continue to run
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(pausing individual threads as necessary). */
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int pause_sc;
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/* The task suspend count left when detaching from a task. */
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int detach_sc;
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/* The initial values used for the run_sc and pause_sc of newly discovered
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threads -- see the definition of those fields in struct proc. */
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int default_thread_run_sc;
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int default_thread_pause_sc;
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int default_thread_detach_sc;
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/* True if the process should be traced when started/attached. Newly
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started processes *must* be traced at first to exec them properly, but
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if this is false, tracing is turned off as soon it has done so. */
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int want_signals;
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/* True if exceptions from the inferior process should be trapped. This
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must be on to use breakpoints. */
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int want_exceptions;
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};
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int
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__proc_pid (struct proc *proc)
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{
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return proc->inf->pid;
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}
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/* Update PROC's real suspend count to match it's desired one. Returns true
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if we think PROC is now in a runnable state. */
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int
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proc_update_sc (struct proc *proc)
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{
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int running;
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int err = 0;
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int delta = proc->sc - proc->cur_sc;
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if (delta)
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proc_debug (proc, "sc: %d --> %d", proc->cur_sc, proc->sc);
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if (proc->sc == 0 && proc->state_changed)
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/* Since PROC may start running, we must write back any state changes. */
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{
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gdb_assert (proc_is_thread (proc));
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proc_debug (proc, "storing back changed thread state");
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err = thread_set_state (proc->port, THREAD_STATE_FLAVOR,
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(thread_state_t) &proc->state, THREAD_STATE_SIZE);
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if (!err)
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proc->state_changed = 0;
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}
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if (delta > 0)
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{
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while (delta-- > 0 && !err)
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{
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if (proc_is_task (proc))
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err = task_suspend (proc->port);
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else
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err = thread_suspend (proc->port);
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}
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}
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else
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{
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while (delta++ < 0 && !err)
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{
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if (proc_is_task (proc))
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err = task_resume (proc->port);
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else
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err = thread_resume (proc->port);
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}
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}
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if (!err)
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proc->cur_sc = proc->sc;
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/* If we got an error, then the task/thread has disappeared. */
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running = !err && proc->sc == 0;
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proc_debug (proc, "is %s", err ? "dead" : running ? "running" : "suspended");
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if (err)
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proc_debug (proc, "err = %s", safe_strerror (err));
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if (running)
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{
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proc->aborted = 0;
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proc->state_valid = proc->state_changed = 0;
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proc->fetched_regs = 0;
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}
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return running;
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}
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/* Thread_abort is called on PROC if needed. PROC must be a thread proc.
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If PROC is deemed `precious', then nothing is done unless FORCE is true.
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In particular, a thread is precious if it's running (in which case forcing
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it includes suspending it first), or if it has an exception pending. */
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void
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proc_abort (struct proc *proc, int force)
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{
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gdb_assert (proc_is_thread (proc));
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if (!proc->aborted)
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{
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struct inf *inf = proc->inf;
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int running = (proc->cur_sc == 0 && inf->task->cur_sc == 0);
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if (running && force)
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{
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proc->sc = 1;
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inf_update_suspends (proc->inf);
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running = 0;
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warning ("Stopped %s.", proc_string (proc));
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}
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else if (proc == inf->wait.thread && inf->wait.exc.reply && !force)
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/* An exception is pending on PROC, which don't mess with. */
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running = 1;
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if (!running)
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/* We only abort the thread if it's not actually running. */
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{
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thread_abort (proc->port);
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proc_debug (proc, "aborted");
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proc->aborted = 1;
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}
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else
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proc_debug (proc, "not aborting");
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}
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}
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/* Make sure that the state field in PROC is up to date, and return a pointer
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to it, or 0 if something is wrong. If WILL_MODIFY is true, makes sure
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that the thread is stopped and aborted first, and sets the state_changed
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field in PROC to true. */
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thread_state_t
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proc_get_state (struct proc *proc, int will_modify)
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{
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int was_aborted = proc->aborted;
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proc_debug (proc, "updating state info%s",
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will_modify ? " (with intention to modify)" : "");
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proc_abort (proc, will_modify);
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if (!was_aborted && proc->aborted)
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/* PROC's state may have changed since we last fetched it. */
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proc->state_valid = 0;
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||
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||
if (!proc->state_valid)
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{
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||
mach_msg_type_number_t state_size = THREAD_STATE_SIZE;
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error_t err =
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thread_get_state (proc->port, THREAD_STATE_FLAVOR,
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(thread_state_t) &proc->state, &state_size);
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proc_debug (proc, "getting thread state");
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proc->state_valid = !err;
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||
}
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||
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||
if (proc->state_valid)
|
||
{
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||
if (will_modify)
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||
proc->state_changed = 1;
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return (thread_state_t) &proc->state;
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||
}
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else
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return 0;
|
||
}
|
||
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||
|
||
/* Set PORT to PROC's exception port. */
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||
error_t
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||
proc_get_exception_port (struct proc * proc, mach_port_t * port)
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||
{
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||
if (proc_is_task (proc))
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return task_get_exception_port (proc->port, port);
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||
else
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||
return thread_get_exception_port (proc->port, port);
|
||
}
|
||
|
||
/* Set PROC's exception port to PORT. */
|
||
error_t
|
||
proc_set_exception_port (struct proc * proc, mach_port_t port)
|
||
{
|
||
proc_debug (proc, "setting exception port: %d", port);
|
||
if (proc_is_task (proc))
|
||
return task_set_exception_port (proc->port, port);
|
||
else
|
||
return thread_set_exception_port (proc->port, port);
|
||
}
|
||
|
||
/* Get PROC's exception port, cleaning up a bit if proc has died. */
|
||
static mach_port_t
|
||
_proc_get_exc_port (struct proc *proc)
|
||
{
|
||
mach_port_t exc_port;
|
||
error_t err = proc_get_exception_port (proc, &exc_port);
|
||
|
||
if (err)
|
||
/* PROC must be dead. */
|
||
{
|
||
if (proc->exc_port)
|
||
mach_port_deallocate (mach_task_self (), proc->exc_port);
|
||
proc->exc_port = MACH_PORT_NULL;
|
||
if (proc->saved_exc_port)
|
||
mach_port_deallocate (mach_task_self (), proc->saved_exc_port);
|
||
proc->saved_exc_port = MACH_PORT_NULL;
|
||
}
|
||
|
||
return exc_port;
|
||
}
|
||
|
||
/* Replace PROC's exception port with EXC_PORT, unless it's already been
|
||
done. Stash away any existing exception port so we can restore it later. */
|
||
void
|
||
proc_steal_exc_port (struct proc *proc, mach_port_t exc_port)
|
||
{
|
||
mach_port_t cur_exc_port = _proc_get_exc_port (proc);
|
||
|
||
if (cur_exc_port)
|
||
{
|
||
error_t err = 0;
|
||
|
||
proc_debug (proc, "inserting exception port: %d", exc_port);
|
||
|
||
if (cur_exc_port != exc_port)
|
||
/* Put in our exception port. */
|
||
err = proc_set_exception_port (proc, exc_port);
|
||
|
||
if (err || cur_exc_port == proc->exc_port)
|
||
/* We previously set the exception port, and it's still set. So we
|
||
just keep the old saved port which is what the proc set. */
|
||
{
|
||
if (cur_exc_port)
|
||
mach_port_deallocate (mach_task_self (), cur_exc_port);
|
||
}
|
||
else
|
||
/* Keep a copy of PROC's old exception port so it can be restored. */
|
||
{
|
||
if (proc->saved_exc_port)
|
||
mach_port_deallocate (mach_task_self (), proc->saved_exc_port);
|
||
proc->saved_exc_port = cur_exc_port;
|
||
}
|
||
|
||
proc_debug (proc, "saved exception port: %d", proc->saved_exc_port);
|
||
|
||
if (!err)
|
||
proc->exc_port = exc_port;
|
||
else
|
||
warning ("Error setting exception port for %s: %s",
|
||
proc_string (proc), safe_strerror (err));
|
||
}
|
||
}
|
||
|
||
/* If we previously replaced PROC's exception port, put back what we
|
||
found there at the time, unless *our* exception port has since been
|
||
overwritten, in which case who knows what's going on. */
|
||
void
|
||
proc_restore_exc_port (struct proc *proc)
|
||
{
|
||
mach_port_t cur_exc_port = _proc_get_exc_port (proc);
|
||
|
||
if (cur_exc_port)
|
||
{
|
||
error_t err = 0;
|
||
|
||
proc_debug (proc, "restoring real exception port");
|
||
|
||
if (proc->exc_port == cur_exc_port)
|
||
/* Our's is still there. */
|
||
err = proc_set_exception_port (proc, proc->saved_exc_port);
|
||
|
||
if (proc->saved_exc_port)
|
||
mach_port_deallocate (mach_task_self (), proc->saved_exc_port);
|
||
proc->saved_exc_port = MACH_PORT_NULL;
|
||
|
||
if (!err)
|
||
proc->exc_port = MACH_PORT_NULL;
|
||
else
|
||
warning ("Error setting exception port for %s: %s",
|
||
proc_string (proc), safe_strerror (err));
|
||
}
|
||
}
|
||
|
||
|
||
/* Turns hardware tracing in PROC on or off when SET is true or false,
|
||
respectively. Returns true on success. */
|
||
int
|
||
proc_trace (struct proc *proc, int set)
|
||
{
|
||
thread_state_t state = proc_get_state (proc, 1);
|
||
|
||
if (!state)
|
||
return 0; /* the thread must be dead. */
|
||
|
||
proc_debug (proc, "tracing %s", set ? "on" : "off");
|
||
|
||
if (set)
|
||
{
|
||
/* XXX We don't get the exception unless the thread has its own
|
||
exception port???? */
|
||
if (proc->exc_port == MACH_PORT_NULL)
|
||
proc_steal_exc_port (proc, proc->inf->event_port);
|
||
THREAD_STATE_SET_TRACED (state);
|
||
}
|
||
else
|
||
THREAD_STATE_CLEAR_TRACED (state);
|
||
|
||
return 1;
|
||
}
|
||
|
||
|
||
/* A variable from which to assign new TIDs. */
|
||
static int next_thread_id = 1;
|
||
|
||
/* Returns a new proc structure with the given fields. Also adds a
|
||
notification for PORT becoming dead to be sent to INF's notify port. */
|
||
struct proc *
|
||
make_proc (struct inf *inf, mach_port_t port, int tid)
|
||
{
|
||
error_t err;
|
||
mach_port_t prev_port = MACH_PORT_NULL;
|
||
struct proc *proc = xmalloc (sizeof (struct proc));
|
||
|
||
proc->port = port;
|
||
proc->tid = tid;
|
||
proc->inf = inf;
|
||
proc->next = 0;
|
||
proc->saved_exc_port = MACH_PORT_NULL;
|
||
proc->exc_port = MACH_PORT_NULL;
|
||
|
||
proc->sc = 0;
|
||
proc->cur_sc = 0;
|
||
|
||
/* Note that these are all the values for threads; the task simply uses the
|
||
corresponding field in INF directly. */
|
||
proc->run_sc = inf->default_thread_run_sc;
|
||
proc->pause_sc = inf->default_thread_pause_sc;
|
||
proc->detach_sc = inf->default_thread_detach_sc;
|
||
proc->resume_sc = proc->run_sc;
|
||
|
||
proc->aborted = 0;
|
||
proc->dead = 0;
|
||
proc->state_valid = 0;
|
||
proc->state_changed = 0;
|
||
|
||
proc_debug (proc, "is new");
|
||
|
||
/* Get notified when things die. */
|
||
err =
|
||
mach_port_request_notification (mach_task_self (), port,
|
||
MACH_NOTIFY_DEAD_NAME, 1,
|
||
inf->event_port,
|
||
MACH_MSG_TYPE_MAKE_SEND_ONCE,
|
||
&prev_port);
|
||
if (err)
|
||
warning ("Couldn't request notification for port %d: %s",
|
||
port, safe_strerror (err));
|
||
else
|
||
{
|
||
proc_debug (proc, "notifications to: %d", inf->event_port);
|
||
if (prev_port != MACH_PORT_NULL)
|
||
mach_port_deallocate (mach_task_self (), prev_port);
|
||
}
|
||
|
||
if (inf->want_exceptions)
|
||
{
|
||
if (proc_is_task (proc))
|
||
/* Make the task exception port point to us. */
|
||
proc_steal_exc_port (proc, inf->event_port);
|
||
else
|
||
/* Just clear thread exception ports -- they default to the
|
||
task one. */
|
||
proc_steal_exc_port (proc, MACH_PORT_NULL);
|
||
}
|
||
|
||
return proc;
|
||
}
|
||
|
||
/* Frees PROC and any resources it uses, and returns the value of PROC's
|
||
next field. */
|
||
struct proc *
|
||
_proc_free (struct proc *proc)
|
||
{
|
||
struct inf *inf = proc->inf;
|
||
struct proc *next = proc->next;
|
||
|
||
proc_debug (proc, "freeing...");
|
||
|
||
if (proc == inf->step_thread)
|
||
/* Turn off single stepping. */
|
||
inf_set_step_thread (inf, 0);
|
||
if (proc == inf->wait.thread)
|
||
inf_clear_wait (inf);
|
||
if (proc == inf->signal_thread)
|
||
inf->signal_thread = 0;
|
||
|
||
if (proc->port != MACH_PORT_NULL)
|
||
{
|
||
if (proc->exc_port != MACH_PORT_NULL)
|
||
/* Restore the original exception port. */
|
||
proc_restore_exc_port (proc);
|
||
if (proc->cur_sc != 0)
|
||
/* Resume the thread/task. */
|
||
{
|
||
proc->sc = 0;
|
||
proc_update_sc (proc);
|
||
}
|
||
mach_port_deallocate (mach_task_self (), proc->port);
|
||
}
|
||
|
||
xfree (proc);
|
||
return next;
|
||
}
|
||
|
||
|
||
struct inf *
|
||
make_inf (void)
|
||
{
|
||
struct inf *inf = xmalloc (sizeof (struct inf));
|
||
|
||
inf->task = 0;
|
||
inf->threads = 0;
|
||
inf->threads_up_to_date = 0;
|
||
inf->pid = 0;
|
||
inf->wait.status.kind = TARGET_WAITKIND_SPURIOUS;
|
||
inf->wait.thread = 0;
|
||
inf->wait.exc.handler = MACH_PORT_NULL;
|
||
inf->wait.exc.reply = MACH_PORT_NULL;
|
||
inf->step_thread = 0;
|
||
inf->signal_thread = 0;
|
||
inf->event_port = MACH_PORT_NULL;
|
||
inf->running = 0;
|
||
inf->stopped = 0;
|
||
inf->nomsg = 1;
|
||
inf->traced = 0;
|
||
inf->no_wait = 0;
|
||
inf->pending_execs = 0;
|
||
inf->pause_sc = 1;
|
||
inf->detach_sc = 0;
|
||
inf->default_thread_run_sc = 0;
|
||
inf->default_thread_pause_sc = 0;
|
||
inf->default_thread_detach_sc = 0;
|
||
inf->want_signals = 1; /* By default */
|
||
inf->want_exceptions = 1; /* By default */
|
||
|
||
return inf;
|
||
}
|
||
|
||
/* Clear INF's target wait status. */
|
||
void
|
||
inf_clear_wait (struct inf *inf)
|
||
{
|
||
inf_debug (inf, "clearing wait");
|
||
inf->wait.status.kind = TARGET_WAITKIND_SPURIOUS;
|
||
inf->wait.thread = 0;
|
||
inf->wait.suppress = 0;
|
||
if (inf->wait.exc.handler != MACH_PORT_NULL)
|
||
{
|
||
mach_port_deallocate (mach_task_self (), inf->wait.exc.handler);
|
||
inf->wait.exc.handler = MACH_PORT_NULL;
|
||
}
|
||
if (inf->wait.exc.reply != MACH_PORT_NULL)
|
||
{
|
||
mach_port_deallocate (mach_task_self (), inf->wait.exc.reply);
|
||
inf->wait.exc.reply = MACH_PORT_NULL;
|
||
}
|
||
}
|
||
|
||
|
||
void
|
||
inf_cleanup (struct inf *inf)
|
||
{
|
||
inf_debug (inf, "cleanup");
|
||
|
||
inf_clear_wait (inf);
|
||
|
||
inf_set_pid (inf, -1);
|
||
inf->pid = 0;
|
||
inf->running = 0;
|
||
inf->stopped = 0;
|
||
inf->nomsg = 1;
|
||
inf->traced = 0;
|
||
inf->no_wait = 0;
|
||
inf->pending_execs = 0;
|
||
|
||
if (inf->event_port)
|
||
{
|
||
mach_port_destroy (mach_task_self (), inf->event_port);
|
||
inf->event_port = MACH_PORT_NULL;
|
||
}
|
||
}
|
||
|
||
void
|
||
inf_startup (struct inf *inf, int pid)
|
||
{
|
||
error_t err;
|
||
|
||
inf_debug (inf, "startup: pid = %d", pid);
|
||
|
||
inf_cleanup (inf);
|
||
|
||
/* Make the port on which we receive all events. */
|
||
err = mach_port_allocate (mach_task_self (),
|
||
MACH_PORT_RIGHT_RECEIVE, &inf->event_port);
|
||
if (err)
|
||
error ("Error allocating event port: %s", safe_strerror (err));
|
||
|
||
/* Make a send right for it, so we can easily copy it for other people. */
|
||
mach_port_insert_right (mach_task_self (), inf->event_port,
|
||
inf->event_port, MACH_MSG_TYPE_MAKE_SEND);
|
||
inf_set_pid (inf, pid);
|
||
}
|
||
|
||
|
||
/* Close current process, if any, and attach INF to process PORT. */
|
||
void
|
||
inf_set_pid (struct inf *inf, pid_t pid)
|
||
{
|
||
task_t task_port;
|
||
struct proc *task = inf->task;
|
||
|
||
inf_debug (inf, "setting pid: %d", pid);
|
||
|
||
if (pid < 0)
|
||
task_port = MACH_PORT_NULL;
|
||
else
|
||
{
|
||
error_t err = proc_pid2task (proc_server, pid, &task_port);
|
||
if (err)
|
||
error ("Error getting task for pid %d: %s", pid, safe_strerror (err));
|
||
}
|
||
|
||
inf_debug (inf, "setting task: %d", task_port);
|
||
|
||
if (inf->pause_sc)
|
||
task_suspend (task_port);
|
||
|
||
if (task && task->port != task_port)
|
||
{
|
||
inf->task = 0;
|
||
inf_validate_procs (inf); /* Trash all the threads. */
|
||
_proc_free (task); /* And the task. */
|
||
}
|
||
|
||
if (task_port != MACH_PORT_NULL)
|
||
{
|
||
inf->task = make_proc (inf, task_port, PROC_TID_TASK);
|
||
inf->threads_up_to_date = 0;
|
||
}
|
||
|
||
if (inf->task)
|
||
{
|
||
inf->pid = pid;
|
||
if (inf->pause_sc)
|
||
/* Reflect task_suspend above. */
|
||
inf->task->sc = inf->task->cur_sc = 1;
|
||
}
|
||
else
|
||
inf->pid = -1;
|
||
}
|
||
|
||
|
||
/* Validates INF's stopped, nomsg and traced field from the actual
|
||
proc server state. Note that the traced field is only updated from
|
||
the proc server state if we do not have a message port. If we do
|
||
have a message port we'd better look at the tracemask itself. */
|
||
static void
|
||
inf_validate_procinfo (struct inf *inf)
|
||
{
|
||
char *noise;
|
||
mach_msg_type_number_t noise_len = 0;
|
||
struct procinfo *pi;
|
||
mach_msg_type_number_t pi_len = 0;
|
||
int info_flags = 0;
|
||
error_t err =
|
||
proc_getprocinfo (proc_server, inf->pid, &info_flags,
|
||
(procinfo_t *) &pi, &pi_len, &noise, &noise_len);
|
||
|
||
if (!err)
|
||
{
|
||
inf->stopped = !!(pi->state & PI_STOPPED);
|
||
inf->nomsg = !!(pi->state & PI_NOMSG);
|
||
if (inf->nomsg)
|
||
inf->traced = !!(pi->state & PI_TRACED);
|
||
vm_deallocate (mach_task_self (), (vm_address_t) pi, pi_len);
|
||
if (noise_len > 0)
|
||
vm_deallocate (mach_task_self (), (vm_address_t) noise, noise_len);
|
||
}
|
||
}
|
||
|
||
/* Validates INF's task suspend count. If it's higher than we expect,
|
||
verify with the user before `stealing' the extra count. */
|
||
static void
|
||
inf_validate_task_sc (struct inf *inf)
|
||
{
|
||
char *noise;
|
||
mach_msg_type_number_t noise_len = 0;
|
||
struct procinfo *pi;
|
||
mach_msg_type_number_t pi_len = 0;
|
||
int info_flags = PI_FETCH_TASKINFO;
|
||
int suspend_count = -1;
|
||
error_t err;
|
||
|
||
retry:
|
||
err = proc_getprocinfo (proc_server, inf->pid, &info_flags,
|
||
(procinfo_t *) &pi, &pi_len, &noise, &noise_len);
|
||
if (err)
|
||
{
|
||
inf->task->dead = 1; /* oh well */
|
||
return;
|
||
}
|
||
|
||
if (inf->task->cur_sc < pi->taskinfo.suspend_count && suspend_count == -1)
|
||
{
|
||
/* The proc server might have suspended the task while stopping
|
||
it. This happens when the task is handling a traced signal.
|
||
Refetch the suspend count. The proc server should be
|
||
finished stopping the task by now. */
|
||
suspend_count = pi->taskinfo.suspend_count;
|
||
goto retry;
|
||
}
|
||
|
||
suspend_count = pi->taskinfo.suspend_count;
|
||
|
||
vm_deallocate (mach_task_self (), (vm_address_t) pi, pi_len);
|
||
if (noise_len > 0)
|
||
vm_deallocate (mach_task_self (), (vm_address_t) pi, pi_len);
|
||
|
||
if (inf->task->cur_sc < suspend_count)
|
||
{
|
||
int abort;
|
||
|
||
target_terminal_ours (); /* Allow I/O. */
|
||
abort = !query ("Pid %d has an additional task suspend count of %d;"
|
||
" clear it? ", inf->pid,
|
||
suspend_count - inf->task->cur_sc);
|
||
target_terminal_inferior (); /* Give it back to the child. */
|
||
|
||
if (abort)
|
||
error ("Additional task suspend count left untouched.");
|
||
|
||
inf->task->cur_sc = suspend_count;
|
||
}
|
||
}
|
||
|
||
/* Turns tracing for INF on or off, depending on ON, unless it already
|
||
is. If INF is running, the resume_sc count of INF's threads will
|
||
be modified, and the signal thread will briefly be run to change
|
||
the trace state. */
|
||
void
|
||
inf_set_traced (struct inf *inf, int on)
|
||
{
|
||
if (on == inf->traced)
|
||
return;
|
||
|
||
if (inf->task && !inf->task->dead)
|
||
/* Make it take effect immediately. */
|
||
{
|
||
sigset_t mask = on ? ~(sigset_t) 0 : 0;
|
||
error_t err =
|
||
INF_RESUME_MSGPORT_RPC (inf, msg_set_init_int (msgport, refport,
|
||
INIT_TRACEMASK, mask));
|
||
if (err == EIEIO)
|
||
{
|
||
if (on)
|
||
warning ("Can't modify tracing state for pid %d: %s",
|
||
inf->pid, "No signal thread");
|
||
inf->traced = on;
|
||
}
|
||
else if (err)
|
||
warning ("Can't modify tracing state for pid %d: %s",
|
||
inf->pid, safe_strerror (err));
|
||
else
|
||
inf->traced = on;
|
||
}
|
||
else
|
||
inf->traced = on;
|
||
}
|
||
|
||
|
||
/* Makes all the real suspend count deltas of all the procs in INF
|
||
match the desired values. Careful to always do thread/task suspend
|
||
counts in the safe order. Returns true if at least one thread is
|
||
thought to be running. */
|
||
int
|
||
inf_update_suspends (struct inf *inf)
|
||
{
|
||
struct proc *task = inf->task;
|
||
/* We don't have to update INF->threads even though we're iterating over it
|
||
because we'll change a thread only if it already has an existing proc
|
||
entry. */
|
||
|
||
inf_debug (inf, "updating suspend counts");
|
||
|
||
if (task)
|
||
{
|
||
struct proc *thread;
|
||
int task_running = (task->sc == 0), thread_running = 0;
|
||
|
||
if (task->sc > task->cur_sc)
|
||
/* The task is becoming _more_ suspended; do before any threads. */
|
||
task_running = proc_update_sc (task);
|
||
|
||
if (inf->pending_execs)
|
||
/* When we're waiting for an exec, things may be happening behind our
|
||
back, so be conservative. */
|
||
thread_running = 1;
|
||
|
||
/* Do all the thread suspend counts. */
|
||
for (thread = inf->threads; thread; thread = thread->next)
|
||
thread_running |= proc_update_sc (thread);
|
||
|
||
if (task->sc != task->cur_sc)
|
||
/* We didn't do the task first, because we wanted to wait for the
|
||
threads; do it now. */
|
||
task_running = proc_update_sc (task);
|
||
|
||
inf_debug (inf, "%srunning...",
|
||
(thread_running && task_running) ? "" : "not ");
|
||
|
||
inf->running = thread_running && task_running;
|
||
|
||
/* Once any thread has executed some code, we can't depend on the
|
||
threads list any more. */
|
||
if (inf->running)
|
||
inf->threads_up_to_date = 0;
|
||
|
||
return inf->running;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Converts a GDB pid to a struct proc. */
|
||
struct proc *
|
||
inf_tid_to_thread (struct inf *inf, int tid)
|
||
{
|
||
struct proc *thread = inf->threads;
|
||
|
||
while (thread)
|
||
if (thread->tid == tid)
|
||
return thread;
|
||
else
|
||
thread = thread->next;
|
||
return 0;
|
||
}
|
||
|
||
/* Converts a thread port to a struct proc. */
|
||
struct proc *
|
||
inf_port_to_thread (struct inf *inf, mach_port_t port)
|
||
{
|
||
struct proc *thread = inf->threads;
|
||
while (thread)
|
||
if (thread->port == port)
|
||
return thread;
|
||
else
|
||
thread = thread->next;
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Make INF's list of threads be consistent with reality of TASK. */
|
||
void
|
||
inf_validate_procs (struct inf *inf)
|
||
{
|
||
thread_array_t threads;
|
||
mach_msg_type_number_t num_threads, i;
|
||
struct proc *task = inf->task;
|
||
|
||
/* If no threads are currently running, this function will guarantee that
|
||
things are up to date. The exception is if there are zero threads --
|
||
then it is almost certainly in an odd state, and probably some outside
|
||
agent will create threads. */
|
||
inf->threads_up_to_date = inf->threads ? !inf->running : 0;
|
||
|
||
if (task)
|
||
{
|
||
error_t err = task_threads (task->port, &threads, &num_threads);
|
||
inf_debug (inf, "fetching threads");
|
||
if (err)
|
||
/* TASK must be dead. */
|
||
{
|
||
task->dead = 1;
|
||
task = 0;
|
||
}
|
||
}
|
||
|
||
if (!task)
|
||
{
|
||
num_threads = 0;
|
||
inf_debug (inf, "no task");
|
||
}
|
||
|
||
{
|
||
/* Make things normally linear. */
|
||
mach_msg_type_number_t search_start = 0;
|
||
/* Which thread in PROCS corresponds to each task thread, & the task. */
|
||
struct proc *matched[num_threads + 1];
|
||
/* The last thread in INF->threads, so we can add to the end. */
|
||
struct proc *last = 0;
|
||
/* The current thread we're considering. */
|
||
struct proc *thread = inf->threads;
|
||
|
||
memset (matched, 0, sizeof (matched));
|
||
|
||
while (thread)
|
||
{
|
||
mach_msg_type_number_t left;
|
||
|
||
for (i = search_start, left = num_threads; left; i++, left--)
|
||
{
|
||
if (i >= num_threads)
|
||
i -= num_threads; /* I wrapped around. */
|
||
if (thread->port == threads[i])
|
||
/* We already know about this thread. */
|
||
{
|
||
matched[i] = thread;
|
||
last = thread;
|
||
thread = thread->next;
|
||
search_start++;
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (!left)
|
||
{
|
||
proc_debug (thread, "died!");
|
||
thread->port = MACH_PORT_NULL;
|
||
thread = _proc_free (thread); /* THREAD is dead. */
|
||
(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 (pid_to_ptid (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. */
|
||
int
|
||
inf_update_procs (struct inf *inf)
|
||
{
|
||
if (!inf->task)
|
||
return 0;
|
||
if (!inf->threads_up_to_date)
|
||
inf_validate_procs (inf);
|
||
return !!inf->task;
|
||
}
|
||
|
||
/* Sets the resume_sc of each thread in inf. That of RUN_THREAD is set to 0,
|
||
and others are set to their run_sc if RUN_OTHERS is true, and otherwise
|
||
their pause_sc. */
|
||
void
|
||
inf_set_threads_resume_sc (struct inf *inf,
|
||
struct proc *run_thread, int run_others)
|
||
{
|
||
struct proc *thread;
|
||
inf_update_procs (inf);
|
||
for (thread = inf->threads; thread; thread = thread->next)
|
||
if (thread == run_thread)
|
||
thread->resume_sc = 0;
|
||
else if (run_others)
|
||
thread->resume_sc = thread->run_sc;
|
||
else
|
||
thread->resume_sc = thread->pause_sc;
|
||
}
|
||
|
||
|
||
/* Cause INF to continue execution immediately; individual threads may still
|
||
be suspended (but their suspend counts will be updated). */
|
||
void
|
||
inf_resume (struct inf *inf)
|
||
{
|
||
struct proc *thread;
|
||
|
||
inf_update_procs (inf);
|
||
|
||
for (thread = inf->threads; thread; thread = thread->next)
|
||
thread->sc = thread->resume_sc;
|
||
|
||
if (inf->task)
|
||
{
|
||
if (!inf->pending_execs)
|
||
/* Try to make sure our task count is correct -- in the case where
|
||
we're waiting for an exec though, things are too volatile, so just
|
||
assume things will be reasonable (which they usually will be). */
|
||
inf_validate_task_sc (inf);
|
||
inf->task->sc = 0;
|
||
}
|
||
|
||
inf_update_suspends (inf);
|
||
}
|
||
|
||
/* Cause INF to stop execution immediately; individual threads may still
|
||
be running. */
|
||
void
|
||
inf_suspend (struct inf *inf)
|
||
{
|
||
struct proc *thread;
|
||
|
||
inf_update_procs (inf);
|
||
|
||
for (thread = inf->threads; thread; thread = thread->next)
|
||
thread->sc = thread->pause_sc;
|
||
|
||
if (inf->task)
|
||
inf->task->sc = inf->pause_sc;
|
||
|
||
inf_update_suspends (inf);
|
||
}
|
||
|
||
|
||
/* INF has one thread PROC that is in single-stepping mode. This
|
||
function changes it to be PROC, changing any old step_thread to be
|
||
a normal one. A PROC of 0 clears any existing value. */
|
||
void
|
||
inf_set_step_thread (struct inf *inf, struct proc *thread)
|
||
{
|
||
gdb_assert (!thread || proc_is_thread (thread));
|
||
|
||
if (thread)
|
||
inf_debug (inf, "setting step thread: %d/%d", inf->pid, thread->tid);
|
||
else
|
||
inf_debug (inf, "clearing step thread");
|
||
|
||
if (inf->step_thread != thread)
|
||
{
|
||
if (inf->step_thread && inf->step_thread->port != MACH_PORT_NULL)
|
||
if (!proc_trace (inf->step_thread, 0))
|
||
return;
|
||
if (thread && proc_trace (thread, 1))
|
||
inf->step_thread = thread;
|
||
else
|
||
inf->step_thread = 0;
|
||
}
|
||
}
|
||
|
||
|
||
/* Set up the thread resume_sc's so that only the signal thread is running
|
||
(plus whatever other thread are set to always run). Returns true if we
|
||
did so, or false if we can't find a signal thread. */
|
||
int
|
||
inf_set_threads_resume_sc_for_signal_thread (struct inf *inf)
|
||
{
|
||
if (inf->signal_thread)
|
||
{
|
||
inf_set_threads_resume_sc (inf, inf->signal_thread, 0);
|
||
return 1;
|
||
}
|
||
else
|
||
return 0;
|
||
}
|
||
|
||
static void
|
||
inf_update_signal_thread (struct inf *inf)
|
||
{
|
||
/* XXX for now we assume that if there's a msgport, the 2nd thread is
|
||
the signal thread. */
|
||
inf->signal_thread = inf->threads ? inf->threads->next : 0;
|
||
}
|
||
|
||
|
||
/* Detachs from INF's inferior task, letting it run once again... */
|
||
void
|
||
inf_detach (struct inf *inf)
|
||
{
|
||
struct proc *task = inf->task;
|
||
|
||
inf_debug (inf, "detaching...");
|
||
|
||
inf_clear_wait (inf);
|
||
inf_set_step_thread (inf, 0);
|
||
|
||
if (task)
|
||
{
|
||
struct proc *thread;
|
||
|
||
inf_validate_procinfo (inf);
|
||
|
||
inf_set_traced (inf, 0);
|
||
if (inf->stopped)
|
||
{
|
||
if (inf->nomsg)
|
||
inf_continue (inf);
|
||
else
|
||
inf_signal (inf, 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, safe_strerror (err));
|
||
|
||
#undef NAME
|
||
}
|
||
|
||
|
||
/* Continue INF without delivering a signal. This is meant to be used
|
||
when INF does not have a message port. */
|
||
void
|
||
inf_continue (struct inf *inf)
|
||
{
|
||
process_t proc;
|
||
error_t err = proc_pid2proc (proc_server, inf->pid, &proc);
|
||
|
||
if (!err)
|
||
{
|
||
inf_debug (inf, "continuing process");
|
||
|
||
err = proc_mark_cont (proc);
|
||
if (!err)
|
||
{
|
||
struct proc *thread;
|
||
|
||
for (thread = inf->threads; thread; thread = thread->next)
|
||
thread_resume (thread->port);
|
||
|
||
inf->stopped = 0;
|
||
}
|
||
}
|
||
|
||
if (err)
|
||
warning ("Can't continue process: %s", safe_strerror (err));
|
||
}
|
||
|
||
|
||
/* The inferior used for all gdb target ops. */
|
||
struct inf *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 ptid_t
|
||
gnu_wait (ptid_t 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;
|
||
|
||
extern int exc_server (mach_msg_header_t *, mach_msg_header_t *);
|
||
extern int msg_reply_server (mach_msg_header_t *, mach_msg_header_t *);
|
||
extern int notify_server (mach_msg_header_t *, mach_msg_header_t *);
|
||
extern int process_reply_server (mach_msg_header_t *, mach_msg_header_t *);
|
||
|
||
gdb_assert (inf->task);
|
||
|
||
if (!inf->threads && !inf->pending_execs)
|
||
/* No threads! Assume that maybe some outside agency is frobbing our
|
||
task, and really look for new threads. If we can't find any, just tell
|
||
the user to try again later. */
|
||
{
|
||
inf_validate_procs (inf);
|
||
if (!inf->threads && !inf->task->dead)
|
||
error ("There are no threads; try again later.");
|
||
}
|
||
|
||
waiting_inf = inf;
|
||
|
||
inf_debug (inf, "waiting for: %d", PIDGET (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", safe_strerror (err));
|
||
else
|
||
{
|
||
inf_debug (inf, "waits pending: %d", proc_waits_pending);
|
||
proc_wait_pid = inf->pid;
|
||
/* Even if proc_waits_pending was > 0 before, we still won't
|
||
get any other replies, because it was either from a
|
||
different INF, or a different process attached to INF --
|
||
and the event port, which is the wait reply port, changes
|
||
when you switch processes. */
|
||
proc_waits_pending = 1;
|
||
}
|
||
}
|
||
|
||
inf_clear_wait (inf);
|
||
|
||
/* What can happen? (1) Dead name notification; (2) Exceptions arrive;
|
||
(3) wait reply from the proc server. */
|
||
|
||
inf_debug (inf, "waiting for an event...");
|
||
err = mach_msg (&msg.hdr, MACH_RCV_MSG | MACH_RCV_INTERRUPT,
|
||
0, sizeof (struct msg), inf->event_port,
|
||
MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
|
||
|
||
/* Re-suspend the task. */
|
||
inf_suspend (inf);
|
||
|
||
if (!inf->task && inf->pending_execs)
|
||
/* When doing an exec, it's possible that the old task wasn't reused
|
||
(e.g., setuid execs). So if the task seems to have disappeared,
|
||
attempt to refetch it, as the pid should still be the same. */
|
||
inf_set_pid (inf, inf->pid);
|
||
|
||
if (err == EMACH_RCV_INTERRUPTED)
|
||
inf_debug (inf, "interrupted");
|
||
else if (err)
|
||
error ("Couldn't wait for an event: %s", safe_strerror (err));
|
||
else
|
||
{
|
||
struct
|
||
{
|
||
mach_msg_header_t hdr;
|
||
mach_msg_type_t err_type;
|
||
kern_return_t err;
|
||
char noise[200];
|
||
}
|
||
reply;
|
||
|
||
inf_debug (inf, "event: msgid = %d", msg.hdr.msgh_id);
|
||
|
||
/* Handle what we got. */
|
||
if (!notify_server (&msg.hdr, &reply.hdr)
|
||
&& !exc_server (&msg.hdr, &reply.hdr)
|
||
&& !process_reply_server (&msg.hdr, &reply.hdr)
|
||
&& !msg_reply_server (&msg.hdr, &reply.hdr))
|
||
/* Whatever it is, it's something strange. */
|
||
error ("Got a strange event, msg id = %d.", msg.hdr.msgh_id);
|
||
|
||
if (reply.err)
|
||
error ("Handling event, msgid = %d: %s",
|
||
msg.hdr.msgh_id, safe_strerror (reply.err));
|
||
}
|
||
|
||
if (inf->pending_execs)
|
||
/* We're waiting for the inferior to finish execing. */
|
||
{
|
||
struct inf_wait *w = &inf->wait;
|
||
enum target_waitkind kind = w->status.kind;
|
||
|
||
if (kind == TARGET_WAITKIND_SPURIOUS)
|
||
/* Since gdb is actually counting the number of times the inferior
|
||
stops, expecting one stop per exec, we only return major events
|
||
while execing. */
|
||
{
|
||
w->suppress = 1;
|
||
inf_debug (inf, "pending_execs = %d, ignoring minor event",
|
||
inf->pending_execs);
|
||
}
|
||
else if (kind == TARGET_WAITKIND_STOPPED
|
||
&& w->status.value.sig == 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 = pid_to_ptid (thread->tid);
|
||
else
|
||
thread = inf_tid_to_thread (inf, PIDGET (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 = pid_to_ptid (inf->threads->tid); /* The first available thread. */
|
||
else
|
||
tid = inferior_ptid; /* let wait_for_inferior handle exit case */
|
||
}
|
||
|
||
if (thread && PIDGET (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)", PIDGET (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, subcode);
|
||
|
||
if (!thread)
|
||
/* We don't know about thread? */
|
||
{
|
||
inf_update_procs (inf);
|
||
thread = inf_port_to_thread (inf, thread_port);
|
||
if (!thread)
|
||
/* Give up, the generating thread is gone. */
|
||
return 0;
|
||
}
|
||
|
||
mach_port_deallocate (mach_task_self (), thread_port);
|
||
mach_port_deallocate (mach_task_self (), task_port);
|
||
|
||
if (!thread->aborted)
|
||
/* THREAD hasn't been aborted since this exception happened (abortion
|
||
clears any exception state), so it must be real. */
|
||
{
|
||
/* Store away the details; this will destroy any previous info. */
|
||
inf->wait.thread = thread;
|
||
|
||
inf->wait.status.kind = TARGET_WAITKIND_STOPPED;
|
||
|
||
if (exception == EXC_BREAKPOINT)
|
||
/* GDB likes to get SIGTRAP for breakpoints. */
|
||
{
|
||
inf->wait.status.value.sig = 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 exception port <%d>",
|
||
thread->saved_exc_port);
|
||
inf->wait.exc.handler = thread->saved_exc_port;
|
||
}
|
||
else
|
||
{
|
||
inf_debug (waiting_inf, "Handler is task exception port <%d>",
|
||
inf->task->saved_exc_port);
|
||
inf->wait.exc.handler = inf->task->saved_exc_port;
|
||
gdb_assert (inf->task->exc_port == port);
|
||
}
|
||
if (inf->wait.exc.handler != MACH_PORT_NULL)
|
||
/* Add a reference to the exception handler. */
|
||
mach_port_mod_refs (mach_task_self (),
|
||
inf->wait.exc.handler, MACH_PORT_RIGHT_SEND,
|
||
1);
|
||
|
||
inf->wait.exc.exception = exception;
|
||
inf->wait.exc.code = code;
|
||
inf->wait.exc.subcode = subcode;
|
||
inf->wait.exc.reply = reply_port;
|
||
|
||
/* Exceptions are encoded in the signal space by putting them after
|
||
_NSIG; this assumes they're positive (and not extremely large)! */
|
||
inf->wait.status.value.sig =
|
||
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;
|
||
}
|
||
|
||
if (inf->task->dead)
|
||
/* Since the task is dead, its threads are dying with it. */
|
||
inf->wait.suppress = 1;
|
||
}
|
||
|
||
mach_port_deallocate (mach_task_self (), dead_port);
|
||
inf->threads_up_to_date = 0; /* Just in case */
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
static error_t
|
||
ill_rpc (char *fun)
|
||
{
|
||
warning ("illegal rpc: %s", fun);
|
||
return 0;
|
||
}
|
||
|
||
error_t
|
||
do_mach_notify_no_senders (mach_port_t notify, mach_port_mscount_t count)
|
||
{
|
||
return ill_rpc ("do_mach_notify_no_senders");
|
||
}
|
||
|
||
error_t
|
||
do_mach_notify_port_deleted (mach_port_t notify, mach_port_t name)
|
||
{
|
||
return ill_rpc ("do_mach_notify_port_deleted");
|
||
}
|
||
|
||
error_t
|
||
do_mach_notify_msg_accepted (mach_port_t notify, mach_port_t name)
|
||
{
|
||
return ill_rpc ("do_mach_notify_msg_accepted");
|
||
}
|
||
|
||
error_t
|
||
do_mach_notify_port_destroyed (mach_port_t notify, mach_port_t name)
|
||
{
|
||
return ill_rpc ("do_mach_notify_port_destroyed");
|
||
}
|
||
|
||
error_t
|
||
do_mach_notify_send_once (mach_port_t notify)
|
||
{
|
||
return ill_rpc ("do_mach_notify_send_once");
|
||
}
|
||
|
||
|
||
/* Process_reply server routines. We only use process_wait_reply. */
|
||
|
||
error_t
|
||
S_proc_wait_reply (mach_port_t reply, error_t err,
|
||
int status, int sigcode, rusage_t rusage, pid_t pid)
|
||
{
|
||
struct inf *inf = waiting_inf;
|
||
|
||
inf_debug (inf, "err = %s, pid = %d, status = 0x%x, sigcode = %d",
|
||
err ? safe_strerror (err) : "0", pid, status, sigcode);
|
||
|
||
if (err && proc_wait_pid && (!inf->task || !inf->task->port))
|
||
/* Ack. The task has died, but the task-died notification code didn't
|
||
tell anyone because it thought a more detailed reply from the
|
||
procserver was forthcoming. However, we now learn that won't
|
||
happen... So we have to act like the task just died, and this time,
|
||
tell the world. */
|
||
inf_task_died_status (inf);
|
||
|
||
if (--proc_waits_pending == 0)
|
||
/* PROC_WAIT_PID represents the most recent wait. We will always get
|
||
replies in order because the proc server is single threaded. */
|
||
proc_wait_pid = 0;
|
||
|
||
inf_debug (inf, "waits pending now: %d", proc_waits_pending);
|
||
|
||
if (err)
|
||
{
|
||
if (err != EINTR)
|
||
{
|
||
warning ("Can't wait for pid %d: %s", inf->pid, safe_strerror (err));
|
||
inf->no_wait = 1;
|
||
|
||
/* Since we can't see the inferior's signals, don't trap them. */
|
||
inf_set_traced (inf, 0);
|
||
}
|
||
}
|
||
else if (pid == inf->pid)
|
||
{
|
||
store_waitstatus (&inf->wait.status, status);
|
||
if (inf->wait.status.kind == TARGET_WAITKIND_STOPPED)
|
||
/* The process has sent us a signal, and stopped itself in a sane
|
||
state pending our actions. */
|
||
{
|
||
inf_debug (inf, "process has stopped itself");
|
||
inf->stopped = 1;
|
||
}
|
||
}
|
||
else
|
||
inf->wait.suppress = 1; /* Something odd happened. Ignore. */
|
||
|
||
return 0;
|
||
}
|
||
|
||
error_t
|
||
S_proc_setmsgport_reply (mach_port_t reply, error_t err,
|
||
mach_port_t old_msg_port)
|
||
{
|
||
return ill_rpc ("S_proc_setmsgport_reply");
|
||
}
|
||
|
||
error_t
|
||
S_proc_getmsgport_reply (mach_port_t reply, error_t err, mach_port_t msg_port)
|
||
{
|
||
return ill_rpc ("S_proc_getmsgport_reply");
|
||
}
|
||
|
||
|
||
/* Msg_reply server routines. We only use msg_sig_post_untraced_reply. */
|
||
|
||
error_t
|
||
S_msg_sig_post_untraced_reply (mach_port_t reply, error_t err)
|
||
{
|
||
struct inf *inf = waiting_inf;
|
||
|
||
if (err == EBUSY)
|
||
/* EBUSY is what we get when the crash server has grabbed control of the
|
||
process and doesn't like what signal we tried to send it. Just act
|
||
like the process stopped (using a signal of 0 should mean that the
|
||
*next* time the user continues, it will pass signal 0, which the crash
|
||
server should like). */
|
||
{
|
||
inf->wait.status.kind = TARGET_WAITKIND_STOPPED;
|
||
inf->wait.status.value.sig = TARGET_SIGNAL_0;
|
||
}
|
||
else if (err)
|
||
warning ("Signal delivery failed: %s", safe_strerror (err));
|
||
|
||
if (err)
|
||
/* We only get this reply when we've posted a signal to a process which we
|
||
thought was stopped, and which we expected to continue after the signal.
|
||
Given that the signal has failed for some reason, it's reasonable to
|
||
assume it's still stopped. */
|
||
inf->stopped = 1;
|
||
else
|
||
inf->wait.suppress = 1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
error_t
|
||
S_msg_sig_post_reply (mach_port_t reply, error_t err)
|
||
{
|
||
return ill_rpc ("S_msg_sig_post_reply");
|
||
}
|
||
|
||
|
||
/* Returns the number of messages queued for the receive right PORT. */
|
||
static mach_port_msgcount_t
|
||
port_msgs_queued (mach_port_t port)
|
||
{
|
||
struct mach_port_status status;
|
||
error_t err =
|
||
mach_port_get_receive_status (mach_task_self (), port, &status);
|
||
|
||
if (err)
|
||
return 0;
|
||
else
|
||
return status.mps_msgcount;
|
||
}
|
||
|
||
|
||
/* Resume execution of the inferior process.
|
||
|
||
If STEP is nonzero, single-step it.
|
||
If SIGNAL is nonzero, give it that signal.
|
||
|
||
TID STEP:
|
||
-1 true Single step the current thread allowing other threads to run.
|
||
-1 false Continue the current thread allowing other threads to run.
|
||
X true Single step the given thread, don't allow any others to run.
|
||
X false Continue the given thread, do not allow any others to run.
|
||
(Where X, of course, is anything except -1)
|
||
|
||
Note that a resume may not `take' if there are pending exceptions/&c
|
||
still unprocessed from the last resume we did (any given resume may result
|
||
in multiple events returned by wait).
|
||
*/
|
||
static void
|
||
gnu_resume (ptid_t 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", PIDGET (tid), step, sig);
|
||
|
||
inf_validate_procinfo (inf);
|
||
|
||
if (sig != TARGET_SIGNAL_0 || inf->stopped)
|
||
{
|
||
if (sig == TARGET_SIGNAL_0 && inf->nomsg)
|
||
inf_continue (inf);
|
||
else
|
||
inf_signal (inf, sig);
|
||
}
|
||
else if (inf->wait.exc.reply != MACH_PORT_NULL)
|
||
/* We received an exception to which we have chosen not to forward, so
|
||
abort the faulting thread, which will perhaps retake it. */
|
||
{
|
||
proc_abort (inf->wait.thread, 1);
|
||
warning ("Aborting %s with unforwarded exception %s.",
|
||
proc_string (inf->wait.thread),
|
||
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 (PIDGET (tid) < 0)
|
||
/* Allow all threads to run, except perhaps single-stepping one. */
|
||
{
|
||
inf_debug (inf, "running all threads; tid = %d", PIDGET (inferior_ptid));
|
||
tid = inferior_ptid; /* What to step. */
|
||
inf_set_threads_resume_sc (inf, 0, 1);
|
||
}
|
||
else
|
||
/* Just allow a single thread to run. */
|
||
{
|
||
struct proc *thread = inf_tid_to_thread (inf, PIDGET (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, PIDGET (tid));
|
||
if (!step_thread)
|
||
warning ("Can't step thread id %d: no such thread.", PIDGET (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 (void)
|
||
{
|
||
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 (void)
|
||
{
|
||
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 (void)
|
||
{
|
||
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 (void)
|
||
{
|
||
if (!current_inferior)
|
||
current_inferior = make_inf ();
|
||
return current_inferior;
|
||
}
|
||
|
||
static void
|
||
gnu_create_inferior (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!");
|
||
}
|
||
void 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->nomsg = 1;
|
||
inf->traced = 1;
|
||
|
||
/* Now let the child run again, knowing that it will stop immediately
|
||
because of the ptrace. */
|
||
inf_resume (inf);
|
||
inferior_ptid = pid_to_ptid (inf_pick_first_thread ());
|
||
|
||
startup_inferior (inf->pending_execs);
|
||
}
|
||
|
||
inf_debug (inf, "creating inferior");
|
||
|
||
fork_inferior (exec_file, allargs, env, trace_me, attach_to_child,
|
||
NULL, NULL);
|
||
|
||
inf_validate_procinfo (inf);
|
||
inf_update_signal_thread (inf);
|
||
inf_set_traced (inf, inf->want_signals);
|
||
|
||
/* Execing the process will have trashed our exception ports; steal them
|
||
back (or make sure they're restored if the user wants that). */
|
||
if (inf->want_exceptions)
|
||
inf_steal_exc_ports (inf);
|
||
else
|
||
inf_restore_exc_ports (inf);
|
||
|
||
/* 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 (void)
|
||
{
|
||
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 (char *args, int from_tty)
|
||
{
|
||
int pid;
|
||
char *exec_file;
|
||
struct inf *inf = cur_inf ();
|
||
|
||
if (!args)
|
||
error_no_arg ("process-id 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_ptid = pid_to_ptid (inf_pick_first_thread ());
|
||
|
||
attach_flag = 1;
|
||
push_target (&gnu_ops);
|
||
|
||
/* We have to initialize the terminal settings now, since the code
|
||
below might try to restore them. */
|
||
target_terminal_init ();
|
||
|
||
/* If the process was stopped before we attached, make it continue the next
|
||
time the user does a continue. */
|
||
inf_validate_procinfo (inf);
|
||
|
||
inf_update_signal_thread (inf);
|
||
inf_set_traced (inf, inf->want_signals);
|
||
|
||
#if 0 /* Do we need this? */
|
||
renumber_threads (0); /* Give our threads reasonable names. */
|
||
#endif
|
||
}
|
||
|
||
|
||
/* Take a program previously attached to and detaches it.
|
||
The program resumes execution and will no longer stop
|
||
on signals, etc. We'd better not have left any breakpoints
|
||
in the program or it'll die when it hits one. For this
|
||
to work, it may be necessary for the process to have been
|
||
previously attached. It *might* work if the program was
|
||
started via fork. */
|
||
static void
|
||
gnu_detach (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_ptid = null_ptid;
|
||
|
||
unpush_target (&gnu_ops); /* Pop out of handling an inferior */
|
||
}
|
||
#endif /* ATTACH_DETACH */
|
||
|
||
|
||
static void
|
||
gnu_terminal_init_inferior (void)
|
||
{
|
||
gdb_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 (void)
|
||
{
|
||
#ifdef CHILD_PREPARE_TO_STORE
|
||
CHILD_PREPARE_TO_STORE ();
|
||
#endif
|
||
}
|
||
|
||
static void
|
||
gnu_open (char *arg, int from_tty)
|
||
{
|
||
error ("Use the \"run\" command to start a Unix child process.");
|
||
}
|
||
|
||
static void
|
||
gnu_stop (void)
|
||
{
|
||
error ("to_stop target function not implemented");
|
||
}
|
||
|
||
static char *
|
||
gnu_pid_to_exec_file (int pid)
|
||
{
|
||
error ("to_pid_to_exec_file target function not implemented");
|
||
return NULL;
|
||
}
|
||
|
||
|
||
static int
|
||
gnu_thread_alive (ptid_t tid)
|
||
{
|
||
inf_update_procs (current_inferior);
|
||
return !!inf_tid_to_thread (current_inferior, PIDGET (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_t task, CORE_ADDR addr, char *myaddr, int length)
|
||
{
|
||
error_t err;
|
||
vm_address_t low_address = (vm_address_t) trunc_page (addr);
|
||
vm_size_t aligned_length =
|
||
(vm_size_t) round_page (addr + length) - low_address;
|
||
pointer_t copied;
|
||
int copy_count;
|
||
|
||
/* Get memory from inferior with page aligned addresses */
|
||
err = vm_read (task, low_address, aligned_length, &copied, ©_count);
|
||
if (err)
|
||
return 0;
|
||
|
||
err = hurd_safe_copyin (myaddr, (void *) addr - low_address + copied, length);
|
||
if (err)
|
||
{
|
||
warning ("Read from inferior faulted: %s", safe_strerror (err));
|
||
length = 0;
|
||
}
|
||
|
||
err = vm_deallocate (mach_task_self (), copied, copy_count);
|
||
if (err)
|
||
warning ("gnu_read_inferior vm_deallocate failed: %s", safe_strerror (err));
|
||
|
||
return length;
|
||
}
|
||
|
||
#define CHK_GOTO_OUT(str,ret) \
|
||
do if (ret != KERN_SUCCESS) { errstr = #str; goto out; } while(0)
|
||
|
||
struct vm_region_list
|
||
{
|
||
struct vm_region_list *next;
|
||
vm_prot_t protection;
|
||
vm_address_t start;
|
||
vm_size_t length;
|
||
};
|
||
|
||
struct obstack region_obstack;
|
||
|
||
/* Write gdb's LEN bytes from MYADDR and copy it to ADDR in inferior
|
||
task's address space. */
|
||
int
|
||
gnu_write_inferior (task_t task, CORE_ADDR addr, char *myaddr, int length)
|
||
{
|
||
error_t err = 0;
|
||
vm_address_t low_address = (vm_address_t) trunc_page (addr);
|
||
vm_size_t aligned_length =
|
||
(vm_size_t) round_page (addr + length) - low_address;
|
||
pointer_t copied;
|
||
int copy_count;
|
||
int deallocate = 0;
|
||
|
||
char *errstr = "Bug in gnu_write_inferior";
|
||
|
||
struct vm_region_list *region_element;
|
||
struct vm_region_list *region_head = (struct vm_region_list *) NULL;
|
||
|
||
/* Get memory from inferior with page aligned addresses */
|
||
err = vm_read (task,
|
||
low_address,
|
||
aligned_length,
|
||
&copied,
|
||
©_count);
|
||
CHK_GOTO_OUT ("gnu_write_inferior vm_read failed", err);
|
||
|
||
deallocate++;
|
||
|
||
err = hurd_safe_copyout ((void *) addr - low_address + copied,
|
||
myaddr, length);
|
||
CHK_GOTO_OUT ("Write to inferior faulted", err);
|
||
|
||
obstack_init (®ion_obstack);
|
||
|
||
/* Do writes atomically.
|
||
First check for holes and unwritable memory. */
|
||
{
|
||
vm_size_t remaining_length = aligned_length;
|
||
vm_address_t region_address = low_address;
|
||
|
||
struct vm_region_list *scan;
|
||
|
||
while (region_address < low_address + aligned_length)
|
||
{
|
||
vm_prot_t protection;
|
||
vm_prot_t max_protection;
|
||
vm_inherit_t inheritance;
|
||
boolean_t shared;
|
||
mach_port_t object_name;
|
||
vm_offset_t offset;
|
||
vm_size_t region_length = remaining_length;
|
||
vm_address_t old_address = region_address;
|
||
|
||
err = vm_region (task,
|
||
®ion_address,
|
||
®ion_length,
|
||
&protection,
|
||
&max_protection,
|
||
&inheritance,
|
||
&shared,
|
||
&object_name,
|
||
&offset);
|
||
CHK_GOTO_OUT ("vm_region failed", err);
|
||
|
||
/* Check for holes in memory */
|
||
if (old_address != region_address)
|
||
{
|
||
warning ("No memory at 0x%x. Nothing written",
|
||
old_address);
|
||
err = KERN_SUCCESS;
|
||
length = 0;
|
||
goto out;
|
||
}
|
||
|
||
if (!(max_protection & VM_PROT_WRITE))
|
||
{
|
||
warning ("Memory at address 0x%x is unwritable. Nothing written",
|
||
old_address);
|
||
err = KERN_SUCCESS;
|
||
length = 0;
|
||
goto out;
|
||
}
|
||
|
||
/* Chain the regions for later use */
|
||
region_element =
|
||
(struct vm_region_list *)
|
||
obstack_alloc (®ion_obstack, sizeof (struct vm_region_list));
|
||
|
||
region_element->protection = protection;
|
||
region_element->start = region_address;
|
||
region_element->length = region_length;
|
||
|
||
/* Chain the regions along with protections */
|
||
region_element->next = region_head;
|
||
region_head = region_element;
|
||
|
||
region_address += region_length;
|
||
remaining_length = remaining_length - region_length;
|
||
}
|
||
|
||
/* If things fail after this, we give up.
|
||
Somebody is messing up inferior_task's mappings. */
|
||
|
||
/* Enable writes to the chained vm regions */
|
||
for (scan = region_head; scan; scan = scan->next)
|
||
{
|
||
if (!(scan->protection & VM_PROT_WRITE))
|
||
{
|
||
err = vm_protect (task,
|
||
scan->start,
|
||
scan->length,
|
||
FALSE,
|
||
scan->protection | VM_PROT_WRITE);
|
||
CHK_GOTO_OUT ("vm_protect: enable write failed", err);
|
||
}
|
||
}
|
||
|
||
err = vm_write (task,
|
||
low_address,
|
||
copied,
|
||
aligned_length);
|
||
CHK_GOTO_OUT ("vm_write failed", err);
|
||
|
||
/* Set up the original region protections, if they were changed */
|
||
for (scan = region_head; scan; scan = scan->next)
|
||
{
|
||
if (!(scan->protection & VM_PROT_WRITE))
|
||
{
|
||
err = vm_protect (task,
|
||
scan->start,
|
||
scan->length,
|
||
FALSE,
|
||
scan->protection);
|
||
CHK_GOTO_OUT ("vm_protect: enable write failed", err);
|
||
}
|
||
}
|
||
}
|
||
|
||
out:
|
||
if (deallocate)
|
||
{
|
||
obstack_free (®ion_obstack, 0);
|
||
|
||
(void) vm_deallocate (mach_task_self (),
|
||
copied,
|
||
copy_count);
|
||
}
|
||
|
||
if (err != KERN_SUCCESS)
|
||
{
|
||
warning ("%s: %s", errstr, mach_error_string (err));
|
||
return 0;
|
||
}
|
||
|
||
return length;
|
||
}
|
||
|
||
|
||
/* Return 0 on failure, number of bytes handled otherwise. TARGET
|
||
is ignored. */
|
||
static int
|
||
gnu_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write,
|
||
struct mem_attrib *attrib,
|
||
struct target_ops *target)
|
||
{
|
||
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", (void *) memaddr, len,
|
||
write ? "<--" : "-->", myaddr);
|
||
if (write)
|
||
return gnu_write_inferior (task, memaddr, myaddr, len);
|
||
else
|
||
return gnu_read_inferior (task, memaddr, myaddr, len);
|
||
}
|
||
}
|
||
|
||
/* Call FUNC on each memory region in the task. */
|
||
static int
|
||
gnu_find_memory_regions (int (*func) (CORE_ADDR,
|
||
unsigned long,
|
||
int, int, int,
|
||
void *),
|
||
void *data)
|
||
{
|
||
error_t err;
|
||
task_t task;
|
||
vm_address_t region_address, last_region_address, last_region_end;
|
||
vm_prot_t last_protection;
|
||
|
||
if (current_inferior == 0 || current_inferior->task == 0)
|
||
return 0;
|
||
task = current_inferior->task->port;
|
||
if (task == MACH_PORT_NULL)
|
||
return 0;
|
||
|
||
region_address = last_region_address = last_region_end = VM_MIN_ADDRESS;
|
||
last_protection = VM_PROT_NONE;
|
||
while (region_address < VM_MAX_ADDRESS)
|
||
{
|
||
vm_prot_t protection;
|
||
vm_prot_t max_protection;
|
||
vm_inherit_t inheritance;
|
||
boolean_t shared;
|
||
mach_port_t object_name;
|
||
vm_offset_t offset;
|
||
vm_size_t region_length = VM_MAX_ADDRESS - region_address;
|
||
vm_address_t old_address = region_address;
|
||
|
||
err = vm_region (task,
|
||
®ion_address,
|
||
®ion_length,
|
||
&protection,
|
||
&max_protection,
|
||
&inheritance,
|
||
&shared,
|
||
&object_name,
|
||
&offset);
|
||
if (err == KERN_NO_SPACE)
|
||
break;
|
||
if (err != KERN_SUCCESS)
|
||
{
|
||
warning ("vm_region failed: %s", mach_error_string (err));
|
||
return -1;
|
||
}
|
||
|
||
if (protection == last_protection && region_address == last_region_end)
|
||
/* This region is contiguous with and indistinguishable from
|
||
the previous one, so we just extend that one. */
|
||
last_region_end = region_address += region_length;
|
||
else
|
||
{
|
||
/* This region is distinct from the last one we saw, so report
|
||
that previous one. */
|
||
if (last_protection != VM_PROT_NONE)
|
||
(*func) (last_region_address,
|
||
last_region_end - last_region_address,
|
||
last_protection & VM_PROT_READ,
|
||
last_protection & VM_PROT_WRITE,
|
||
last_protection & VM_PROT_EXECUTE,
|
||
data);
|
||
last_region_address = region_address;
|
||
last_region_end = region_address += region_length;
|
||
last_protection = protection;
|
||
}
|
||
}
|
||
|
||
/* Report the final region. */
|
||
if (last_region_end > last_region_address && last_protection != VM_PROT_NONE)
|
||
(*func) (last_region_address, last_region_end - last_region_address,
|
||
last_protection & VM_PROT_READ,
|
||
last_protection & VM_PROT_WRITE,
|
||
last_protection & VM_PROT_EXECUTE,
|
||
data);
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Return printable description of proc. */
|
||
char *
|
||
proc_string (struct proc *proc)
|
||
{
|
||
static char tid_str[80];
|
||
if (proc_is_task (proc))
|
||
sprintf (tid_str, "process %d", proc->inf->pid);
|
||
else
|
||
sprintf (tid_str, "thread %d.%d",
|
||
proc->inf->pid, pid_to_thread_id (MERGEPID (proc->tid, 0)));
|
||
return tid_str;
|
||
}
|
||
|
||
static char *
|
||
gnu_pid_to_str (ptid_t ptid)
|
||
{
|
||
struct inf *inf = current_inferior;
|
||
int tid = PIDGET (ptid);
|
||
struct proc *thread = inf_tid_to_thread (inf, tid);
|
||
|
||
if (thread)
|
||
return proc_string (thread);
|
||
else
|
||
{
|
||
static char tid_str[80];
|
||
sprintf (tid_str, "bogus thread id %d", tid);
|
||
return tid_str;
|
||
}
|
||
}
|
||
|
||
|
||
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_attach = gnu_attach; /* to_attach */
|
||
gnu_ops.to_detach = gnu_detach; /* to_detach */
|
||
gnu_ops.to_resume = gnu_resume; /* to_resume */
|
||
gnu_ops.to_wait = gnu_wait; /* to_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_find_memory_regions = gnu_find_memory_regions;
|
||
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_save_ours = terminal_save_ours;
|
||
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_create_inferior = gnu_create_inferior; /* to_create_inferior */
|
||
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_thread_alive = gnu_thread_alive; /* to_thread_alive */
|
||
gnu_ops.to_pid_to_str = gnu_pid_to_str; /* to_pid_to_str */
|
||
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_stratum = process_stratum; /* to_stratum */
|
||
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_magic = OPS_MAGIC; /* to_magic */
|
||
} /* init_gnu_ops */
|
||
|
||
|
||
/* User task commands. */
|
||
|
||
struct cmd_list_element *set_task_cmd_list = 0;
|
||
struct cmd_list_element *show_task_cmd_list = 0;
|
||
/* User thread commands. */
|
||
|
||
/* Commands with a prefix of `set/show thread'. */
|
||
extern struct cmd_list_element *thread_cmd_list;
|
||
struct cmd_list_element *set_thread_cmd_list = NULL;
|
||
struct cmd_list_element *show_thread_cmd_list = NULL;
|
||
|
||
/* Commands with a prefix of `set/show thread default'. */
|
||
struct cmd_list_element *set_thread_default_cmd_list = NULL;
|
||
struct cmd_list_element *show_thread_default_cmd_list = NULL;
|
||
|
||
static void
|
||
set_thread_cmd (char *args, int from_tty)
|
||
{
|
||
printf_unfiltered ("\"set thread\" must be followed by the name of a thread property, or \"default\".\n");
|
||
}
|
||
|
||
static void
|
||
show_thread_cmd (char *args, int from_tty)
|
||
{
|
||
printf_unfiltered ("\"show thread\" must be followed by the name of a thread property, or \"default\".\n");
|
||
}
|
||
|
||
static void
|
||
set_thread_default_cmd (char *args, int from_tty)
|
||
{
|
||
printf_unfiltered ("\"set thread default\" must be followed by the name of a thread property.\n");
|
||
}
|
||
|
||
static void
|
||
show_thread_default_cmd (char *args, int from_tty)
|
||
{
|
||
printf_unfiltered ("\"show thread default\" must be followed by the name of a thread property.\n");
|
||
}
|
||
|
||
static int
|
||
parse_int_arg (char *args, char *cmd_prefix)
|
||
{
|
||
if (args)
|
||
{
|
||
char *arg_end;
|
||
int val = strtoul (args, &arg_end, 10);
|
||
if (*args && *arg_end == '\0')
|
||
return val;
|
||
}
|
||
error ("Illegal argument for \"%s\" command, should be an integer.", cmd_prefix);
|
||
}
|
||
|
||
static int
|
||
_parse_bool_arg (char *args, char *t_val, char *f_val, char *cmd_prefix)
|
||
{
|
||
if (!args || strcmp (args, t_val) == 0)
|
||
return 1;
|
||
else if (strcmp (args, f_val) == 0)
|
||
return 0;
|
||
else
|
||
error ("Illegal argument for \"%s\" command, should be \"%s\" or \"%s\".",
|
||
cmd_prefix, t_val, f_val);
|
||
}
|
||
|
||
#define parse_bool_arg(args, cmd_prefix) \
|
||
_parse_bool_arg (args, "on", "off", cmd_prefix)
|
||
|
||
static void
|
||
check_empty (char *args, char *cmd_prefix)
|
||
{
|
||
if (args)
|
||
error ("Garbage after \"%s\" command: `%s'", cmd_prefix, args);
|
||
}
|
||
|
||
/* Returns the alive thread named by INFERIOR_PID, or signals an error. */
|
||
static struct proc *
|
||
cur_thread (void)
|
||
{
|
||
struct inf *inf = cur_inf ();
|
||
struct proc *thread = inf_tid_to_thread (inf, PIDGET (inferior_ptid));
|
||
if (!thread)
|
||
error ("No current thread.");
|
||
return thread;
|
||
}
|
||
|
||
/* Returns the current inferior, but signals an error if it has no task. */
|
||
static struct inf *
|
||
active_inf (void)
|
||
{
|
||
struct inf *inf = cur_inf ();
|
||
if (!inf->task)
|
||
error ("No current process.");
|
||
return inf;
|
||
}
|
||
|
||
|
||
static void
|
||
set_task_pause_cmd (char *args, int from_tty)
|
||
{
|
||
struct inf *inf = cur_inf ();
|
||
int old_sc = inf->pause_sc;
|
||
|
||
inf->pause_sc = parse_bool_arg (args, "set task pause");
|
||
|
||
if (old_sc == 0 && inf->pause_sc != 0)
|
||
/* If the task is currently unsuspended, immediately suspend it,
|
||
otherwise wait until the next time it gets control. */
|
||
inf_suspend (inf);
|
||
}
|
||
|
||
static void
|
||
show_task_pause_cmd (char *args, int from_tty)
|
||
{
|
||
struct inf *inf = cur_inf ();
|
||
check_empty (args, "show task pause");
|
||
printf_unfiltered ("The inferior task %s suspended while gdb has control.\n",
|
||
inf->task
|
||
? (inf->pause_sc == 0 ? "isn't" : "is")
|
||
: (inf->pause_sc == 0 ? "won't be" : "will be"));
|
||
}
|
||
|
||
static void
|
||
set_task_detach_sc_cmd (char *args, int from_tty)
|
||
{
|
||
cur_inf ()->detach_sc = parse_int_arg (args, "set task detach-suspend-count");
|
||
}
|
||
|
||
static void
|
||
show_task_detach_sc_cmd (char *args, int from_tty)
|
||
{
|
||
check_empty (args, "show task detach-suspend-count");
|
||
printf_unfiltered ("The inferior task will be left with a suspend count of %d when detaching.\n",
|
||
cur_inf ()->detach_sc);
|
||
}
|
||
|
||
|
||
static void
|
||
set_thread_default_pause_cmd (char *args, int from_tty)
|
||
{
|
||
struct inf *inf = cur_inf ();
|
||
inf->default_thread_pause_sc =
|
||
parse_bool_arg (args, "set thread default pause") ? 0 : 1;
|
||
}
|
||
|
||
static void
|
||
show_thread_default_pause_cmd (char *args, int from_tty)
|
||
{
|
||
struct inf *inf = cur_inf ();
|
||
int sc = inf->default_thread_pause_sc;
|
||
check_empty (args, "show thread default pause");
|
||
printf_unfiltered ("New threads %s suspended while gdb has control%s.\n",
|
||
sc ? "are" : "aren't",
|
||
!sc && inf->pause_sc ? " (but the task is)" : "");
|
||
}
|
||
|
||
static void
|
||
set_thread_default_run_cmd (char *args, int from_tty)
|
||
{
|
||
struct inf *inf = cur_inf ();
|
||
inf->default_thread_run_sc =
|
||
parse_bool_arg (args, "set thread default run") ? 0 : 1;
|
||
}
|
||
|
||
static void
|
||
show_thread_default_run_cmd (char *args, int from_tty)
|
||
{
|
||
struct inf *inf = cur_inf ();
|
||
check_empty (args, "show thread default run");
|
||
printf_unfiltered ("New threads %s allowed to run.\n",
|
||
inf->default_thread_run_sc == 0 ? "are" : "aren't");
|
||
}
|
||
|
||
static void
|
||
set_thread_default_detach_sc_cmd (char *args, int from_tty)
|
||
{
|
||
cur_inf ()->default_thread_detach_sc =
|
||
parse_int_arg (args, "set thread default detach-suspend-count");
|
||
}
|
||
|
||
static void
|
||
show_thread_default_detach_sc_cmd (char *args, int from_tty)
|
||
{
|
||
check_empty (args, "show thread default detach-suspend-count");
|
||
printf_unfiltered ("New threads will get a detach-suspend-count of %d.\n",
|
||
cur_inf ()->default_thread_detach_sc);
|
||
}
|
||
|
||
|
||
/* Steal a send right called NAME in the inferior task, and make it PROC's
|
||
saved exception port. */
|
||
static void
|
||
steal_exc_port (struct proc *proc, mach_port_t name)
|
||
{
|
||
error_t err;
|
||
mach_port_t port;
|
||
mach_msg_type_name_t port_type;
|
||
|
||
if (!proc || !proc->inf->task)
|
||
error ("No inferior task.");
|
||
|
||
err = mach_port_extract_right (proc->inf->task->port,
|
||
name, MACH_MSG_TYPE_COPY_SEND,
|
||
&port, &port_type);
|
||
if (err)
|
||
error ("Couldn't extract send right %d from inferior: %s",
|
||
name, safe_strerror (err));
|
||
|
||
if (proc->saved_exc_port)
|
||
/* Get rid of our reference to the old one. */
|
||
mach_port_deallocate (mach_task_self (), proc->saved_exc_port);
|
||
|
||
proc->saved_exc_port = port;
|
||
|
||
if (!proc->exc_port)
|
||
/* If PROC is a thread, we may not have set its exception port before.
|
||
We can't use proc_steal_exc_port because it also sets saved_exc_port. */
|
||
{
|
||
proc->exc_port = proc->inf->event_port;
|
||
err = proc_set_exception_port (proc, proc->exc_port);
|
||
error ("Can't set exception port for %s: %s",
|
||
proc_string (proc), safe_strerror (err));
|
||
}
|
||
}
|
||
|
||
static void
|
||
set_task_exc_port_cmd (char *args, int from_tty)
|
||
{
|
||
struct inf *inf = cur_inf ();
|
||
if (!args)
|
||
error ("No argument to \"set task exception-port\" command.");
|
||
steal_exc_port (inf->task, parse_and_eval_address (args));
|
||
}
|
||
|
||
static void
|
||
set_stopped_cmd (char *args, int from_tty)
|
||
{
|
||
cur_inf ()->stopped = _parse_bool_arg (args, "yes", "no", "set stopped");
|
||
}
|
||
|
||
static void
|
||
show_stopped_cmd (char *args, int from_tty)
|
||
{
|
||
struct inf *inf = active_inf ();
|
||
check_empty (args, "show stopped");
|
||
printf_unfiltered ("The inferior process %s stopped.\n",
|
||
inf->stopped ? "is" : "isn't");
|
||
}
|
||
|
||
static void
|
||
set_sig_thread_cmd (char *args, int from_tty)
|
||
{
|
||
struct inf *inf = cur_inf ();
|
||
|
||
if (!args || (!isdigit (*args) && strcmp (args, "none") != 0))
|
||
error ("Illegal argument to \"set signal-thread\" command.\n"
|
||
"Should be an integer thread ID, or `none'.");
|
||
|
||
if (strcmp (args, "none") == 0)
|
||
inf->signal_thread = 0;
|
||
else
|
||
{
|
||
int tid = PIDGET (thread_id_to_pid (atoi (args)));
|
||
if (tid < 0)
|
||
error ("Thread ID %s not known. Use the \"info threads\" command to\n"
|
||
"see the IDs of currently known threads.", args);
|
||
inf->signal_thread = inf_tid_to_thread (inf, tid);
|
||
}
|
||
}
|
||
|
||
static void
|
||
show_sig_thread_cmd (char *args, int from_tty)
|
||
{
|
||
struct inf *inf = active_inf ();
|
||
check_empty (args, "show signal-thread");
|
||
if (inf->signal_thread)
|
||
printf_unfiltered ("The signal thread is %s.\n",
|
||
proc_string (inf->signal_thread));
|
||
else
|
||
printf_unfiltered ("There is no signal thread.\n");
|
||
}
|
||
|
||
|
||
static void
|
||
set_signals_cmd (char *args, int from_tty)
|
||
{
|
||
struct inf *inf = cur_inf ();
|
||
|
||
inf->want_signals = parse_bool_arg (args, "set signals");
|
||
|
||
if (inf->task && inf->want_signals != inf->traced)
|
||
/* Make this take effect immediately in a running process. */
|
||
inf_set_traced (inf, inf->want_signals);
|
||
}
|
||
|
||
static void
|
||
show_signals_cmd (char *args, int from_tty)
|
||
{
|
||
struct inf *inf = cur_inf ();
|
||
check_empty (args, "show signals");
|
||
printf_unfiltered ("The inferior process's signals %s intercepted.\n",
|
||
inf->task
|
||
? (inf->traced ? "are" : "aren't")
|
||
: (inf->want_signals ? "will be" : "won't be"));
|
||
}
|
||
|
||
static void
|
||
set_exceptions_cmd (char *args, int from_tty)
|
||
{
|
||
struct inf *inf = cur_inf ();
|
||
int val = parse_bool_arg (args, "set exceptions");
|
||
|
||
if (inf->task && inf->want_exceptions != val)
|
||
/* Make this take effect immediately in a running process. */
|
||
/* XXX */ ;
|
||
|
||
inf->want_exceptions = val;
|
||
}
|
||
|
||
static void
|
||
show_exceptions_cmd (char *args, int from_tty)
|
||
{
|
||
struct inf *inf = cur_inf ();
|
||
check_empty (args, "show exceptions");
|
||
printf_unfiltered ("Exceptions in the inferior %s trapped.\n",
|
||
inf->task
|
||
? (inf->want_exceptions ? "are" : "aren't")
|
||
: (inf->want_exceptions ? "will be" : "won't be"));
|
||
}
|
||
|
||
|
||
static void
|
||
set_task_cmd (char *args, int from_tty)
|
||
{
|
||
printf_unfiltered ("\"set task\" must be followed by the name"
|
||
" of a task property.\n");
|
||
}
|
||
|
||
static void
|
||
show_task_cmd (char *args, int from_tty)
|
||
{
|
||
struct inf *inf = cur_inf ();
|
||
|
||
check_empty (args, "show task");
|
||
|
||
show_signals_cmd (0, from_tty);
|
||
show_exceptions_cmd (0, from_tty);
|
||
show_task_pause_cmd (0, from_tty);
|
||
|
||
if (inf->pause_sc == 0)
|
||
show_thread_default_pause_cmd (0, from_tty);
|
||
show_thread_default_run_cmd (0, from_tty);
|
||
|
||
if (inf->task)
|
||
{
|
||
show_stopped_cmd (0, from_tty);
|
||
show_sig_thread_cmd (0, from_tty);
|
||
}
|
||
|
||
if (inf->detach_sc != 0)
|
||
show_task_detach_sc_cmd (0, from_tty);
|
||
if (inf->default_thread_detach_sc != 0)
|
||
show_thread_default_detach_sc_cmd (0, from_tty);
|
||
}
|
||
|
||
|
||
static void
|
||
set_noninvasive_cmd (char *args, int from_tty)
|
||
{
|
||
/* Invert the sense of the arg for each component. */
|
||
char *inv_args = parse_bool_arg (args, "set noninvasive") ? "off" : "on";
|
||
|
||
set_task_pause_cmd (inv_args, from_tty);
|
||
set_signals_cmd (inv_args, from_tty);
|
||
set_exceptions_cmd (inv_args, from_tty);
|
||
}
|
||
|
||
|
||
static void
|
||
info_port_rights (char *args, mach_port_type_t only)
|
||
{
|
||
struct inf *inf = active_inf ();
|
||
struct value *vmark = value_mark ();
|
||
|
||
if (args)
|
||
/* Explicit list of port rights. */
|
||
{
|
||
while (*args)
|
||
{
|
||
struct value *val = parse_to_comma_and_eval (&args);
|
||
long right = value_as_long (val);
|
||
error_t err =
|
||
print_port_info (right, 0, inf->task->port, PORTINFO_DETAILS,
|
||
stdout);
|
||
if (err)
|
||
error ("%ld: %s.", right, safe_strerror (err));
|
||
}
|
||
}
|
||
else
|
||
/* Print all of them. */
|
||
{
|
||
error_t err =
|
||
print_task_ports_info (inf->task->port, only, PORTINFO_DETAILS,
|
||
stdout);
|
||
if (err)
|
||
error ("%s.", safe_strerror (err));
|
||
}
|
||
|
||
value_free_to_mark (vmark);
|
||
}
|
||
|
||
static void
|
||
info_send_rights_cmd (char *args, int from_tty)
|
||
{
|
||
info_port_rights (args, MACH_PORT_TYPE_SEND);
|
||
}
|
||
|
||
static void
|
||
info_recv_rights_cmd (char *args, int from_tty)
|
||
{
|
||
info_port_rights (args, MACH_PORT_TYPE_RECEIVE);
|
||
}
|
||
|
||
static void
|
||
info_port_sets_cmd (char *args, int from_tty)
|
||
{
|
||
info_port_rights (args, MACH_PORT_TYPE_PORT_SET);
|
||
}
|
||
|
||
static void
|
||
info_dead_names_cmd (char *args, int from_tty)
|
||
{
|
||
info_port_rights (args, MACH_PORT_TYPE_DEAD_NAME);
|
||
}
|
||
|
||
static void
|
||
info_port_rights_cmd (char *args, int from_tty)
|
||
{
|
||
info_port_rights (args, ~0);
|
||
}
|
||
|
||
|
||
static void
|
||
add_task_commands (void)
|
||
{
|
||
add_cmd ("pause", class_run, set_thread_default_pause_cmd,
|
||
"Set whether the new threads are suspended while gdb has control.\n\
|
||
This property normally has no effect because the whole task is\n\
|
||
suspended, however, that may be disabled with \"set task pause off\".\n\
|
||
The default value is \"off\".",
|
||
&set_thread_default_cmd_list);
|
||
add_cmd ("pause", no_class, show_thread_default_pause_cmd,
|
||
"Show whether new threads are suspended while gdb has control.",
|
||
&show_thread_default_cmd_list);
|
||
|
||
add_cmd ("run", class_run, set_thread_default_run_cmd,
|
||
"Set whether new threads are allowed to run \
|
||
(once gdb has noticed them).",
|
||
&set_thread_default_cmd_list);
|
||
add_cmd ("run", no_class, show_thread_default_run_cmd,
|
||
"Show whether new threads are allowed to run \
|
||
(once gdb has noticed them).",
|
||
&show_thread_default_cmd_list);
|
||
|
||
add_cmd ("detach-suspend-count", class_run, set_thread_default_detach_sc_cmd,
|
||
"Set the default detach-suspend-count value for new threads.",
|
||
&set_thread_default_cmd_list);
|
||
add_cmd ("detach-suspend-count", no_class, show_thread_default_detach_sc_cmd,
|
||
"Show the default detach-suspend-count value for new threads.",
|
||
&show_thread_default_cmd_list);
|
||
|
||
add_cmd ("signals", class_run, set_signals_cmd,
|
||
"Set whether the inferior process's signals will be intercepted.\n\
|
||
Mach exceptions (such as breakpoint traps) are not affected.",
|
||
&setlist);
|
||
add_alias_cmd ("sigs", "signals", class_run, 1, &setlist);
|
||
add_cmd ("signals", no_class, show_signals_cmd,
|
||
"Show whether the inferior process's signals will be intercepted.",
|
||
&showlist);
|
||
add_alias_cmd ("sigs", "signals", no_class, 1, &showlist);
|
||
|
||
add_cmd ("signal-thread", class_run, set_sig_thread_cmd,
|
||
"Set the thread that gdb thinks is the libc signal thread.\n\
|
||
This thread is run when delivering a signal to a non-stopped process.",
|
||
&setlist);
|
||
add_alias_cmd ("sigthread", "signal-thread", class_run, 1, &setlist);
|
||
add_cmd ("signal-thread", no_class, show_sig_thread_cmd,
|
||
"Set the thread that gdb thinks is the libc signal thread.",
|
||
&showlist);
|
||
add_alias_cmd ("sigthread", "signal-thread", no_class, 1, &showlist);
|
||
|
||
add_cmd ("stopped", class_run, set_stopped_cmd,
|
||
"Set whether gdb thinks the inferior process is stopped \
|
||
as with SIGSTOP.\n\
|
||
Stopped process will be continued by sending them a signal.",
|
||
&setlist);
|
||
add_cmd ("stopped", no_class, show_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 happens\n\
|
||
until the next time the program is continued.\n\
|
||
When setting this to \"off\", \"set thread default pause on\" can be\n\
|
||
used to pause individual threads by default instead.",
|
||
&set_task_cmd_list);
|
||
add_cmd ("pause", no_class, show_task_pause_cmd,
|
||
"Show whether the task is suspended while gdb has control.",
|
||
&show_task_cmd_list);
|
||
|
||
add_cmd ("detach-suspend-count", class_run, set_task_detach_sc_cmd,
|
||
"Set the suspend count will leave on the thread when detaching.",
|
||
&set_task_cmd_list);
|
||
add_cmd ("detach-suspend-count", no_class, show_task_detach_sc_cmd,
|
||
"Show the suspend count will leave on the thread when detaching.",
|
||
&show_task_cmd_list);
|
||
|
||
add_cmd ("exception-port", no_class, set_task_exc_port_cmd,
|
||
"Set the task exception port to which we forward exceptions.\n\
|
||
The argument should be the value of the send right in the task.",
|
||
&set_task_cmd_list);
|
||
add_alias_cmd ("excp", "exception-port", no_class, 1, &set_task_cmd_list);
|
||
add_alias_cmd ("exc-port", "exception-port", no_class, 1,
|
||
&set_task_cmd_list);
|
||
|
||
/* 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\n\
|
||
`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_port_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.", safe_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));
|
||
}
|
||
|
||
|
||
static void
|
||
add_thread_commands (void)
|
||
{
|
||
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 happens\n\
|
||
until the next time the program is continued. This property normally\n\
|
||
has no effect because the whole task is suspended, however, that may\n\
|
||
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.\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.",
|
||
&show_thread_cmd_list);
|
||
|
||
add_cmd ("exception-port", no_class, set_thread_exc_port_cmd,
|
||
"Set the thread exception port to which we forward exceptions.\n\
|
||
This overrides 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\n\
|
||
to the thread's initial suspend-count when gdb notices the threads.",
|
||
&thread_cmd_list);
|
||
}
|
||
|
||
|
||
void
|
||
_initialize_gnu_nat (void)
|
||
{
|
||
proc_server = getproc ();
|
||
|
||
init_gnu_ops ();
|
||
add_target (&gnu_ops);
|
||
|
||
add_task_commands ();
|
||
add_thread_commands ();
|
||
add_set_cmd ("gnu-debug", class_maintenance,
|
||
var_boolean, (char *) &gnu_debug_flag,
|
||
"Set debugging output for the gnu backend.", &maintenancelist);
|
||
}
|
||
|
||
#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 (CORE_ADDR pc, int amount)
|
||
{
|
||
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", safe_strerror (ret));
|
||
}
|
||
#endif /* FLUSH_INFERIOR_CACHE */
|