gdb/stop-gdb.c

   1 /* A client to make GDB return to command level in Mach 3.
   2    Copyright 1992, 1993, 1994, 2000 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 /* Authors: Jukka Virtanen <jtv@hut.fi> and Peter Stout <pds@cs.cmu.edu>.
  22
  23    A simple client to make GDB (versions 4.4 and later) on Mach 3 return
  24    to the command level when it is waiting for the inferior to stop.
  25
  26    Actions: Lookup the send right to the GDB message port from the
  27    NetMsgServer.
  28
  29    Send an asynchronous message with msgh_id
  30    GDB_MESSAGE_ID_STOP to that port.
  31  */
  32
  33 #include <stdio.h>
  34
  35 #include "defs.h"
  36
  37 #include <mach.h>
  38 #include <mach/message.h>
  39 #include <mach_error.h>
  40 #include <servers/netname.h>
  41 #include <servers/netname_defs.h>
  42
  43 void
  44 main (int argc, char **argv)
  45 {
  46   kern_return_t kr;
  47   mach_msg_header_t msg;
  48   mach_port_t gdb_port;
  49   char *host;
  50   char *name;
  51
  52   if (argc == 1)
  53     argv[argc++] = GDB_DEF_NAME;
  54
  55   if (argc != 2)
  56     {
  57       fprintf (stderr, "Usage : %s <GDB name>\n", argv[0]);
  58       exit (1);
  59     }
  60
  61   /* Allow the user to specify a remote host.  */
  62   host = strchr (argv[1], '@');
  63   if (host)
  64     *(host++) = '\0';
  65   else
  66     host = (char *) "";
  67
  68   name = malloc (strlen (argv[1]) + sizeof (GDB_NAME_PREFIX));
  69   if (name == NULL)
  70     {
  71       fprintf (stderr, "Unable to allocate memory for name.");
  72       exit (1);
  73     }
  74
  75   strcpy (name, GDB_NAME_PREFIX);
  76   strcat (name, argv[1]);
  77
  78   /* Look up the GDB service port.  For convenience, add the
  79      GDB_NAME_PREFIX the argument before looking up the name.
  80      For backwards compatibility, do it without.  */
  81
  82   kr = netname_look_up (name_server_port, host, name, &gdb_port);
  83   if (kr == NETNAME_NOT_CHECKED_IN)
  84     kr = netname_look_up (name_server_port, host, argv[1], &gdb_port);
  85   if (kr != KERN_SUCCESS)
  86     {
  87       fprintf (stderr, "Unable to lookup the GDB service port: %s.\n",
  88                mach_error_string (kr));
  89       exit (1);
  90     }
  91
  92   /* Code generated by mig stub generator, with minor cleanups :-)
  93
  94      simpleroutine stop_inferior(gdb_port : mach_port_t);  */
  95
  96   msg.msgh_bits = MACH_MSGH_BITS (MACH_MSG_TYPE_COPY_SEND, 0);
  97   msg.msgh_remote_port = gdb_port;
  98   msg.msgh_local_port = MACH_PORT_NULL;
  99   msg.msgh_size = sizeof (msg);
 100   msg.msgh_seqno = 0;
 101   msg.msgh_id = GDB_MESSAGE_ID_STOP;
 102
 103   kr = mach_msg_send (&msg);
 104   if (kr != KERN_SUCCESS)
 105     fprintf (stderr, "Message not sent, return code %d : %s\n", kr,
 106              mach_error_string (kr));
 107
 108   exit (kr != KERN_SUCCESS);
 109 }