| 1 |
104 |
markom |
/* Handling of inferior events for the event loop for GDB, the GNU debugger.
|
| 2 |
|
|
Copyright 1999 Free Software Foundation, Inc.
|
| 3 |
|
|
Written by Elena Zannoni <ezannoni@cygnus.com> of Cygnus Solutions.
|
| 4 |
|
|
|
| 5 |
|
|
This file is part of GDB.
|
| 6 |
|
|
|
| 7 |
|
|
This program is free software; you can redistribute it and/or modify
|
| 8 |
|
|
it under the terms of the GNU General Public License as published by
|
| 9 |
|
|
the Free Software Foundation; either version 2 of the License, or
|
| 10 |
|
|
(at your option) any later version.
|
| 11 |
|
|
|
| 12 |
|
|
This program is distributed in the hope that it will be useful,
|
| 13 |
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
| 14 |
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
| 15 |
|
|
GNU General Public License for more details.
|
| 16 |
|
|
|
| 17 |
|
|
You should have received a copy of the GNU General Public License
|
| 18 |
|
|
along with this program; if not, write to the Free Software
|
| 19 |
|
|
Foundation, Inc., 59 Temple Place - Suite 330,
|
| 20 |
|
|
Boston, MA 02111-1307, USA. */
|
| 21 |
|
|
|
| 22 |
|
|
#include "defs.h"
|
| 23 |
|
|
#include "inferior.h" /* For fetch_inferior_event. */
|
| 24 |
|
|
#include "target.h" /* For enum inferior_event_type. */
|
| 25 |
|
|
#include "event-loop.h"
|
| 26 |
|
|
#include "event-top.h"
|
| 27 |
|
|
#include "inf-loop.h"
|
| 28 |
|
|
#include "remote.h"
|
| 29 |
|
|
|
| 30 |
|
|
static int fetch_inferior_event_wrapper (gdb_client_data client_data);
|
| 31 |
|
|
static void complete_execution (void);
|
| 32 |
|
|
|
| 33 |
|
|
void
|
| 34 |
|
|
inferior_event_handler_wrapper (gdb_client_data client_data)
|
| 35 |
|
|
{
|
| 36 |
|
|
inferior_event_handler (INF_QUIT_REQ, client_data);
|
| 37 |
|
|
}
|
| 38 |
|
|
|
| 39 |
|
|
/* General function to handle events in the inferior. So far it just
|
| 40 |
|
|
takes care of detecting errors reported by select() or poll(),
|
| 41 |
|
|
otherwise it assumes that all is OK, and goes on reading data from
|
| 42 |
|
|
the fd. This however may not always be what we want to do. */
|
| 43 |
|
|
void
|
| 44 |
|
|
inferior_event_handler (enum inferior_event_type event_type,
|
| 45 |
|
|
gdb_client_data client_data)
|
| 46 |
|
|
{
|
| 47 |
|
|
switch (event_type)
|
| 48 |
|
|
{
|
| 49 |
|
|
case INF_ERROR:
|
| 50 |
|
|
printf_unfiltered ("error detected from target.\n");
|
| 51 |
|
|
target_async (NULL, 0);
|
| 52 |
|
|
pop_target ();
|
| 53 |
|
|
discard_all_continuations ();
|
| 54 |
|
|
do_exec_error_cleanups (ALL_CLEANUPS);
|
| 55 |
|
|
break;
|
| 56 |
|
|
|
| 57 |
|
|
case INF_REG_EVENT:
|
| 58 |
|
|
/* Use catch errors for now, until the inner layers of
|
| 59 |
|
|
fetch_inferior_event (i.e. readchar) can return meaningful
|
| 60 |
|
|
error status. If an error occurs while getting an event from
|
| 61 |
|
|
the target, just get rid of the target. */
|
| 62 |
|
|
if (!catch_errors (fetch_inferior_event_wrapper,
|
| 63 |
|
|
client_data, "", RETURN_MASK_ALL))
|
| 64 |
|
|
{
|
| 65 |
|
|
target_async (NULL, 0);
|
| 66 |
|
|
pop_target ();
|
| 67 |
|
|
discard_all_continuations ();
|
| 68 |
|
|
do_exec_error_cleanups (ALL_CLEANUPS);
|
| 69 |
|
|
display_gdb_prompt (0);
|
| 70 |
|
|
}
|
| 71 |
|
|
break;
|
| 72 |
|
|
|
| 73 |
|
|
case INF_EXEC_COMPLETE:
|
| 74 |
|
|
/* Is there anything left to do for the command issued to
|
| 75 |
|
|
complete? */
|
| 76 |
|
|
do_all_continuations ();
|
| 77 |
|
|
/* Reset things after target has stopped for the async commands. */
|
| 78 |
|
|
complete_execution ();
|
| 79 |
|
|
break;
|
| 80 |
|
|
|
| 81 |
|
|
case INF_EXEC_CONTINUE:
|
| 82 |
|
|
/* Is there anything left to do for the command issued to
|
| 83 |
|
|
complete? */
|
| 84 |
|
|
do_all_intermediate_continuations ();
|
| 85 |
|
|
break;
|
| 86 |
|
|
|
| 87 |
|
|
case INF_QUIT_REQ:
|
| 88 |
|
|
/* FIXME: ezannoni 1999-10-04. This call should really be a
|
| 89 |
|
|
target vector entry, so that it can be used for any kind of
|
| 90 |
|
|
targets. */
|
| 91 |
|
|
async_remote_interrupt_twice (NULL);
|
| 92 |
|
|
break;
|
| 93 |
|
|
|
| 94 |
|
|
case INF_TIMER:
|
| 95 |
|
|
default:
|
| 96 |
|
|
printf_unfiltered ("Event type not recognized.\n");
|
| 97 |
|
|
break;
|
| 98 |
|
|
}
|
| 99 |
|
|
}
|
| 100 |
|
|
|
| 101 |
|
|
static int
|
| 102 |
|
|
fetch_inferior_event_wrapper (gdb_client_data client_data)
|
| 103 |
|
|
{
|
| 104 |
|
|
fetch_inferior_event (client_data);
|
| 105 |
|
|
return 1;
|
| 106 |
|
|
}
|
| 107 |
|
|
|
| 108 |
|
|
/* Reset proper settings after an asynchronous command has finished.
|
| 109 |
|
|
If the execution command was in synchronous mode, register stdin
|
| 110 |
|
|
with the event loop, and reset the prompt. */
|
| 111 |
|
|
|
| 112 |
|
|
static void
|
| 113 |
|
|
complete_execution (void)
|
| 114 |
|
|
{
|
| 115 |
|
|
target_executing = 0;
|
| 116 |
|
|
|
| 117 |
|
|
/* Unregister the inferior from the event loop. This is done so that
|
| 118 |
|
|
when the inferior is not running we don't get distracted by
|
| 119 |
|
|
spurious inferior output. */
|
| 120 |
|
|
target_async (NULL, 0);
|
| 121 |
|
|
|
| 122 |
|
|
if (sync_execution)
|
| 123 |
|
|
{
|
| 124 |
|
|
do_exec_error_cleanups (ALL_CLEANUPS);
|
| 125 |
|
|
display_gdb_prompt (0);
|
| 126 |
|
|
}
|
| 127 |
|
|
else
|
| 128 |
|
|
{
|
| 129 |
|
|
if (exec_done_display_p)
|
| 130 |
|
|
printf_unfiltered ("completed.\n");
|
| 131 |
|
|
}
|
| 132 |
|
|
}
|
