OpenCores
URL https://opencores.org/ocsvn/openrisc_me/openrisc_me/trunk

Subversion Repositories openrisc_me

[/] [openrisc/] [trunk/] [gnu-src/] [gdb-7.2/] [gdb/] [inf-loop.c] - Blame information for rev 330

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 330 jeremybenn
/* Handling of inferior events for the event loop for GDB, the GNU debugger.
2
   Copyright (C) 1999, 2007, 2008, 2009, 2010 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 3 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, see <http://www.gnu.org/licenses/>. */
19
 
20
#include "defs.h"
21
#include "inferior.h"           /* For fetch_inferior_event. */
22
#include "target.h"             /* For enum inferior_event_type. */
23
#include "event-loop.h"
24
#include "event-top.h"
25
#include "inf-loop.h"
26
#include "remote.h"
27
#include "exceptions.h"
28
#include "language.h"
29
#include "gdbthread.h"
30
 
31
static int fetch_inferior_event_wrapper (gdb_client_data client_data);
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
  struct gdb_exception e;
48
  int was_sync = 0;
49
 
50
  switch (event_type)
51
    {
52
    case INF_ERROR:
53
      printf_unfiltered (_("error detected from target.\n"));
54
      pop_all_targets_above (file_stratum, 0);
55
      discard_all_intermediate_continuations ();
56
      discard_all_continuations ();
57
      async_enable_stdin ();
58
      break;
59
 
60
    case INF_REG_EVENT:
61
      /* Use catch errors for now, until the inner layers of
62
         fetch_inferior_event (i.e. readchar) can return meaningful
63
         error status.  If an error occurs while getting an event from
64
         the target, just get rid of the target. */
65
      if (!catch_errors (fetch_inferior_event_wrapper,
66
                         client_data, "", RETURN_MASK_ALL))
67
        {
68
          pop_all_targets_above (file_stratum, 0);
69
          discard_all_intermediate_continuations ();
70
          discard_all_continuations ();
71
          async_enable_stdin ();
72
          display_gdb_prompt (0);
73
        }
74
      break;
75
 
76
    case INF_EXEC_COMPLETE:
77
 
78
      if (!non_stop)
79
        {
80
          /* Unregister the inferior from the event loop. This is done
81
             so that when the inferior is not running we don't get
82
             distracted by spurious inferior output.  */
83
          if (target_has_execution)
84
            target_async (NULL, 0);
85
        }
86
 
87
      /* The call to async_enable_stdin below resets 'sync_execution'.
88
         However, if sync_execution is 1 now, we also need to show the
89
         prompt below, so save the current value.  */
90
      was_sync = sync_execution;
91
      async_enable_stdin ();
92
 
93
      /* Do all continuations associated with the whole inferior (not
94
         a particular thread).  */
95
      if (!ptid_equal (inferior_ptid, null_ptid))
96
        do_all_inferior_continuations ();
97
 
98
      /* If we were doing a multi-step (eg: step n, next n), but it
99
         got interrupted by a breakpoint, still do the pending
100
         continuations.  The continuation itself is responsible for
101
         distinguishing the cases.  The continuations are allowed to
102
         touch the inferior memory, e.g. to remove breakpoints, so run
103
         them before running breakpoint commands, which may resume the
104
         target.  */
105
      if (non_stop
106
          && target_has_execution
107
          && !ptid_equal (inferior_ptid, null_ptid))
108
        do_all_intermediate_continuations_thread (inferior_thread ());
109
      else
110
        do_all_intermediate_continuations ();
111
 
112
      /* Always finish the previous command before running any
113
         breakpoint commands.  Any stop cancels the previous command.
114
         E.g. a "finish" or "step-n" command interrupted by an
115
         unrelated breakpoint is canceled.  */
116
      if (non_stop
117
          && target_has_execution
118
          && !ptid_equal (inferior_ptid, null_ptid))
119
        do_all_continuations_thread (inferior_thread ());
120
      else
121
        do_all_continuations ();
122
 
123
      if (current_language != expected_language
124
          && language_mode == language_mode_auto)
125
        language_info (1);      /* Print what changed.  */
126
 
127
      /* Don't propagate breakpoint commands errors.  Either we're
128
         stopping or some command resumes the inferior.  The user will
129
         be informed.  */
130
      TRY_CATCH (e, RETURN_MASK_ALL)
131
        {
132
          bpstat_do_actions ();
133
        }
134
 
135
      if (!was_sync
136
          && exec_done_display_p
137
          && (ptid_equal (inferior_ptid, null_ptid)
138
              || !is_running (inferior_ptid)))
139
        printf_unfiltered (_("completed.\n"));
140
      break;
141
 
142
    case INF_EXEC_CONTINUE:
143
      /* Is there anything left to do for the command issued to
144
         complete? */
145
 
146
      if (non_stop)
147
        do_all_intermediate_continuations_thread (inferior_thread ());
148
      else
149
        do_all_intermediate_continuations ();
150
      break;
151
 
152
    case INF_QUIT_REQ:
153
      /* FIXME: ezannoni 1999-10-04. This call should really be a
154
         target vector entry, so that it can be used for any kind of
155
         targets. */
156
      async_remote_interrupt_twice (NULL);
157
      break;
158
 
159
    case INF_TIMER:
160
    default:
161
      printf_unfiltered (_("Event type not recognized.\n"));
162
      break;
163
    }
164
}
165
 
166
static int
167
fetch_inferior_event_wrapper (gdb_client_data client_data)
168
{
169
  fetch_inferior_event (client_data);
170
  return 1;
171
}

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.